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;
57 static time_t boot_time
;
58 static int in_grace
= 1;
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 static stateid_t zerostateid
; /* bits all 0 */
65 static stateid_t onestateid
; /* bits all 1 */
67 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
68 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
72 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
73 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
78 * protects clientid_hashtbl[], clientstr_hashtbl[],
79 * unconfstr_hashtbl[], uncofid_hashtbl[].
81 static DECLARE_MUTEX(client_sema
);
83 static kmem_cache_t
*stateowner_slab
= NULL
;
84 static kmem_cache_t
*file_slab
= NULL
;
85 static kmem_cache_t
*stateid_slab
= NULL
;
86 static kmem_cache_t
*deleg_slab
= NULL
;
95 nfs4_unlock_state(void)
101 opaque_hashval(const void *ptr
, int nbytes
)
103 unsigned char *cptr
= (unsigned char *) ptr
;
113 /* forward declarations */
114 static void release_stateowner(struct nfs4_stateowner
*sop
);
115 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
121 /* recall_lock protects the del_recall_lru */
122 static spinlock_t recall_lock
= SPIN_LOCK_UNLOCKED
;
123 static struct list_head del_recall_lru
;
126 free_nfs4_file(struct kref
*kref
)
128 struct nfs4_file
*fp
= container_of(kref
, struct nfs4_file
, fi_ref
);
129 list_del(&fp
->fi_hash
);
131 kmem_cache_free(file_slab
, fp
);
135 put_nfs4_file(struct nfs4_file
*fi
)
137 kref_put(&fi
->fi_ref
, free_nfs4_file
);
141 get_nfs4_file(struct nfs4_file
*fi
)
143 kref_get(&fi
->fi_ref
);
146 static struct nfs4_delegation
*
147 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
149 struct nfs4_delegation
*dp
;
150 struct nfs4_file
*fp
= stp
->st_file
;
151 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
153 dprintk("NFSD alloc_init_deleg\n");
154 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
157 INIT_LIST_HEAD(&dp
->dl_perfile
);
158 INIT_LIST_HEAD(&dp
->dl_perclnt
);
159 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
164 get_file(stp
->st_vfs_file
);
165 dp
->dl_vfs_file
= stp
->st_vfs_file
;
167 dp
->dl_recall
.cbr_dp
= NULL
;
168 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
169 dp
->dl_recall
.cbr_trunc
= 0;
170 dp
->dl_stateid
.si_boot
= boot_time
;
171 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
172 dp
->dl_stateid
.si_fileid
= 0;
173 dp
->dl_stateid
.si_generation
= 0;
174 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
175 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
176 current_fh
->fh_handle
.fh_size
);
178 atomic_set(&dp
->dl_count
, 1);
179 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
180 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
185 nfs4_put_delegation(struct nfs4_delegation
*dp
)
187 if (atomic_dec_and_test(&dp
->dl_count
)) {
188 dprintk("NFSD: freeing dp %p\n",dp
);
189 put_nfs4_file(dp
->dl_file
);
190 kmem_cache_free(deleg_slab
, dp
);
194 /* Remove the associated file_lock first, then remove the delegation.
195 * lease_modify() is called to remove the FS_LEASE file_lock from
196 * the i_flock list, eventually calling nfsd's lock_manager
197 * fl_release_callback.
200 nfs4_close_delegation(struct nfs4_delegation
*dp
)
202 struct file
*filp
= dp
->dl_vfs_file
;
204 dprintk("NFSD: close_delegation dp %p\n",dp
);
205 dp
->dl_vfs_file
= NULL
;
206 /* The following nfsd_close may not actually close the file,
207 * but we want to remove the lease in any case. */
209 setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
213 /* Called under the state lock. */
215 unhash_delegation(struct nfs4_delegation
*dp
)
217 list_del_init(&dp
->dl_perfile
);
218 list_del_init(&dp
->dl_perclnt
);
219 spin_lock(&recall_lock
);
220 list_del_init(&dp
->dl_recall_lru
);
221 spin_unlock(&recall_lock
);
222 nfs4_close_delegation(dp
);
223 nfs4_put_delegation(dp
);
230 /* Hash tables for nfs4_clientid state */
231 #define CLIENT_HASH_BITS 4
232 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
233 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
235 #define clientid_hashval(id) \
236 ((id) & CLIENT_HASH_MASK)
237 #define clientstr_hashval(name) \
238 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
240 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
241 * used in reboot/reset lease grace period processing
243 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
244 * setclientid_confirmed info.
246 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
249 * client_lru holds client queue ordered by nfs4_client.cl_time
252 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
253 * for last close replay.
255 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
256 static int reclaim_str_hashtbl_size
= 0;
257 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
258 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
259 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
260 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
261 static struct list_head client_lru
;
262 static struct list_head close_lru
;
265 renew_client(struct nfs4_client
*clp
)
268 * Move client to the end to the LRU list.
270 dprintk("renewing client (clientid %08x/%08x)\n",
271 clp
->cl_clientid
.cl_boot
,
272 clp
->cl_clientid
.cl_id
);
273 list_move_tail(&clp
->cl_lru
, &client_lru
);
274 clp
->cl_time
= get_seconds();
277 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
279 STALE_CLIENTID(clientid_t
*clid
)
281 if (clid
->cl_boot
== boot_time
)
283 dprintk("NFSD stale clientid (%08x/%08x)\n",
284 clid
->cl_boot
, clid
->cl_id
);
289 * XXX Should we use a slab cache ?
290 * This type of memory management is somewhat inefficient, but we use it
291 * anyway since SETCLIENTID is not a common operation.
293 static inline struct nfs4_client
*
294 alloc_client(struct xdr_netobj name
)
296 struct nfs4_client
*clp
;
298 if ((clp
= kmalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
299 memset(clp
, 0, sizeof(*clp
));
300 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
301 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
302 clp
->cl_name
.len
= name
.len
;
313 free_client(struct nfs4_client
*clp
)
315 if (clp
->cl_cred
.cr_group_info
)
316 put_group_info(clp
->cl_cred
.cr_group_info
);
317 kfree(clp
->cl_name
.data
);
322 put_nfs4_client(struct nfs4_client
*clp
)
324 if (atomic_dec_and_test(&clp
->cl_count
))
329 expire_client(struct nfs4_client
*clp
)
331 struct nfs4_stateowner
*sop
;
332 struct nfs4_delegation
*dp
;
333 struct nfs4_callback
*cb
= &clp
->cl_callback
;
334 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
335 struct list_head reaplist
;
337 dprintk("NFSD: expire_client cl_count %d\n",
338 atomic_read(&clp
->cl_count
));
340 /* shutdown rpc client, ending any outstanding recall rpcs */
341 if (atomic_read(&cb
->cb_set
) == 1 && clnt
) {
342 rpc_shutdown_client(clnt
);
343 clnt
= clp
->cl_callback
.cb_client
= NULL
;
346 INIT_LIST_HEAD(&reaplist
);
347 spin_lock(&recall_lock
);
348 while (!list_empty(&clp
->cl_delegations
)) {
349 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
350 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
352 list_del_init(&dp
->dl_perclnt
);
353 list_move(&dp
->dl_recall_lru
, &reaplist
);
355 spin_unlock(&recall_lock
);
356 while (!list_empty(&reaplist
)) {
357 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
358 list_del_init(&dp
->dl_recall_lru
);
359 unhash_delegation(dp
);
361 list_del(&clp
->cl_idhash
);
362 list_del(&clp
->cl_strhash
);
363 list_del(&clp
->cl_lru
);
364 while (!list_empty(&clp
->cl_openowners
)) {
365 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
366 release_stateowner(sop
);
368 put_nfs4_client(clp
);
371 static struct nfs4_client
*
372 create_client(struct xdr_netobj name
, char *recdir
) {
373 struct nfs4_client
*clp
;
375 if (!(clp
= alloc_client(name
)))
377 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
378 atomic_set(&clp
->cl_count
, 1);
379 atomic_set(&clp
->cl_callback
.cb_set
, 0);
380 clp
->cl_callback
.cb_parsed
= 0;
381 INIT_LIST_HEAD(&clp
->cl_idhash
);
382 INIT_LIST_HEAD(&clp
->cl_strhash
);
383 INIT_LIST_HEAD(&clp
->cl_openowners
);
384 INIT_LIST_HEAD(&clp
->cl_delegations
);
385 INIT_LIST_HEAD(&clp
->cl_lru
);
391 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
392 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
396 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
397 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
398 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
402 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
404 target
->cr_uid
= source
->cr_uid
;
405 target
->cr_gid
= source
->cr_gid
;
406 target
->cr_group_info
= source
->cr_group_info
;
407 get_group_info(target
->cr_group_info
);
411 same_name(const char *n1
, const char *n2
) {
412 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
416 cmp_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
) {
417 return(!memcmp(v1
->data
,v2
->data
,sizeof(v1
->data
)));
421 cmp_clid(clientid_t
* cl1
, clientid_t
* cl2
) {
422 return((cl1
->cl_boot
== cl2
->cl_boot
) &&
423 (cl1
->cl_id
== cl2
->cl_id
));
426 /* XXX what about NGROUP */
428 cmp_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
){
429 return(cr1
->cr_uid
== cr2
->cr_uid
);
434 gen_clid(struct nfs4_client
*clp
) {
435 clp
->cl_clientid
.cl_boot
= boot_time
;
436 clp
->cl_clientid
.cl_id
= current_clientid
++;
440 gen_confirm(struct nfs4_client
*clp
) {
445 p
= (u32
*)clp
->cl_confirm
.data
;
451 check_name(struct xdr_netobj name
) {
455 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
456 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
463 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
465 unsigned int idhashval
;
467 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
468 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
469 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
470 list_add_tail(&clp
->cl_lru
, &client_lru
);
471 clp
->cl_time
= get_seconds();
475 move_to_confirmed(struct nfs4_client
*clp
)
477 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
478 unsigned int strhashval
;
480 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
481 list_del_init(&clp
->cl_strhash
);
482 list_del_init(&clp
->cl_idhash
);
483 list_add(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
484 strhashval
= clientstr_hashval(clp
->cl_recdir
);
485 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
489 static struct nfs4_client
*
490 find_confirmed_client(clientid_t
*clid
)
492 struct nfs4_client
*clp
;
493 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
495 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
496 if (cmp_clid(&clp
->cl_clientid
, clid
))
502 static struct nfs4_client
*
503 find_unconfirmed_client(clientid_t
*clid
)
505 struct nfs4_client
*clp
;
506 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
508 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
509 if (cmp_clid(&clp
->cl_clientid
, clid
))
515 static struct nfs4_client
*
516 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
518 struct nfs4_client
*clp
;
520 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
521 if (same_name(clp
->cl_recdir
, dname
))
527 static struct nfs4_client
*
528 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
530 struct nfs4_client
*clp
;
532 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
533 if (same_name(clp
->cl_recdir
, dname
))
539 /* a helper function for parse_callback */
541 parse_octet(unsigned int *lenp
, char **addrp
)
543 unsigned int len
= *lenp
;
555 if ((c
< '0') || (c
> '9')) {
561 n
= (n
* 10) + (c
- '0');
572 /* parse and set the setclientid ipv4 callback address */
574 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
579 u32 addrlen
= addr_len
;
580 char *addr
= addr_val
;
585 for(i
= 4; i
> 0 ; i
--) {
586 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
589 cbaddr
|= (temp
<< shift
);
597 for(i
= 2; i
> 0 ; i
--) {
598 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
601 cbport
|= (temp
<< shift
);
610 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
612 struct nfs4_callback
*cb
= &clp
->cl_callback
;
614 /* Currently, we only support tcp for the callback channel */
615 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
618 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
619 &cb
->cb_addr
, &cb
->cb_port
)))
621 cb
->cb_prog
= se
->se_callback_prog
;
622 cb
->cb_ident
= se
->se_callback_ident
;
626 printk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
627 "will not receive delegations\n",
628 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
635 * RFC 3010 has a complex implmentation description of processing a
636 * SETCLIENTID request consisting of 5 bullets, labeled as
637 * CASE0 - CASE4 below.
640 * callback information will be processed in a future patch
642 * an unconfirmed record is added when:
643 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
644 * CASE 1: confirmed record found with matching name, principal,
645 * verifier, and clientid.
646 * CASE 2: confirmed record found with matching name, principal,
647 * and there is no unconfirmed record with matching
650 * an unconfirmed record is replaced when:
651 * CASE 3: confirmed record found with matching name, principal,
652 * and an unconfirmed record is found with matching
653 * name, principal, and with clientid and
654 * confirm that does not match the confirmed record.
655 * CASE 4: there is no confirmed record with matching name and
656 * principal. there is an unconfirmed record with
657 * matching name, principal.
659 * an unconfirmed record is deleted when:
660 * CASE 1: an unconfirmed record that matches input name, verifier,
661 * and confirmed clientid.
662 * CASE 4: any unconfirmed records with matching name and principal
663 * that exist after an unconfirmed record has been replaced
664 * as described above.
668 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_setclientid
*setclid
)
670 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
671 struct xdr_netobj clname
= {
672 .len
= setclid
->se_namelen
,
673 .data
= setclid
->se_name
,
675 nfs4_verifier clverifier
= setclid
->se_verf
;
676 unsigned int strhashval
;
677 struct nfs4_client
*conf
, *unconf
, *new;
679 char dname
[HEXDIR_LEN
];
681 status
= nfserr_inval
;
682 if (!check_name(clname
))
685 status
= nfs4_make_rec_clidname(dname
, &clname
);
690 * XXX The Duplicate Request Cache (DRC) has been checked (??)
691 * We get here on a DRC miss.
694 strhashval
= clientstr_hashval(dname
);
697 conf
= find_confirmed_client_by_str(dname
, strhashval
);
701 * clname match, confirmed, different principal
702 * or different ip_address
704 status
= nfserr_clid_inuse
;
705 if (!cmp_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
706 || conf
->cl_addr
!= ip_addr
) {
707 printk("NFSD: setclientid: string in use by client"
708 "(clientid %08x/%08x)\n",
709 conf
->cl_clientid
.cl_boot
, conf
->cl_clientid
.cl_id
);
713 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
714 status
= nfserr_resource
;
718 * placed first, because it is the normal case.
721 expire_client(unconf
);
722 new = create_client(clname
, dname
);
725 copy_verf(new, &clverifier
);
726 new->cl_addr
= ip_addr
;
727 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
730 gen_callback(new, setclid
);
731 add_to_unconfirmed(new, strhashval
);
732 } else if (cmp_verf(&conf
->cl_verifier
, &clverifier
)) {
735 * cl_name match, confirmed, principal match
736 * verifier match: probable callback update
738 * remove any unconfirmed nfs4_client with
739 * matching cl_name, cl_verifier, and cl_clientid
741 * create and insert an unconfirmed nfs4_client with same
742 * cl_name, cl_verifier, and cl_clientid as existing
743 * nfs4_client, but with the new callback info and a
747 /* Note this is removing unconfirmed {*x***},
748 * which is stronger than RFC recommended {vxc**}.
749 * This has the advantage that there is at most
750 * one {*x***} in either list at any time.
752 expire_client(unconf
);
754 new = create_client(clname
, dname
);
757 copy_verf(new,&conf
->cl_verifier
);
758 new->cl_addr
= ip_addr
;
759 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
760 copy_clid(new, conf
);
762 gen_callback(new, setclid
);
763 add_to_unconfirmed(new,strhashval
);
764 } else if (!unconf
) {
767 * clname match, confirmed, principal match
768 * verfier does not match
769 * no unconfirmed. create a new unconfirmed nfs4_client
770 * using input clverifier, clname, and callback info
771 * and generate a new cl_clientid and cl_confirm.
773 new = create_client(clname
, dname
);
776 copy_verf(new,&clverifier
);
777 new->cl_addr
= ip_addr
;
778 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
781 gen_callback(new, setclid
);
782 add_to_unconfirmed(new, strhashval
);
783 } else if (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
786 * confirmed found (name, principal match)
787 * confirmed verifier does not match input clverifier
789 * unconfirmed found (name match)
790 * confirmed->cl_confirm != unconfirmed->cl_confirm
792 * remove unconfirmed.
794 * create an unconfirmed nfs4_client
795 * with same cl_name as existing confirmed nfs4_client,
796 * but with new callback info, new cl_clientid,
797 * new cl_verifier and a new cl_confirm
799 expire_client(unconf
);
800 new = create_client(clname
, dname
);
803 copy_verf(new,&clverifier
);
804 new->cl_addr
= ip_addr
;
805 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
808 gen_callback(new, setclid
);
809 add_to_unconfirmed(new, strhashval
);
811 /* No cases hit !!! */
812 status
= nfserr_inval
;
816 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
817 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
818 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
827 * RFC 3010 has a complex implmentation description of processing a
828 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
829 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
831 * NOTE: callback information will be processed here in a future patch
834 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
, struct nfsd4_setclientid_confirm
*setclientid_confirm
)
836 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
837 struct nfs4_client
*conf
, *unconf
;
838 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
839 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
842 if (STALE_CLIENTID(clid
))
843 return nfserr_stale_clientid
;
845 * XXX The Duplicate Request Cache (DRC) has been checked (??)
846 * We get here on a DRC miss.
851 conf
= find_confirmed_client(clid
);
852 unconf
= find_unconfirmed_client(clid
);
854 status
= nfserr_clid_inuse
;
855 if (conf
&& conf
->cl_addr
!= ip_addr
)
857 if (unconf
&& unconf
->cl_addr
!= ip_addr
)
860 if ((conf
&& unconf
) &&
861 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
862 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
863 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
864 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
866 * unconf record that matches input clientid and input confirm.
867 * conf record that matches input clientid.
868 * conf and unconf records match names, verifiers
870 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
871 status
= nfserr_clid_inuse
;
873 /* XXX: We just turn off callbacks until we can handle
874 * change request correctly. */
875 conf
->cl_callback
.cb_parsed
= 0;
877 expire_client(unconf
);
881 } else if ((conf
&& !unconf
) ||
883 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
884 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
886 * conf record that matches input clientid.
887 * if unconf record matches input clientid, then
888 * unconf->cl_name or unconf->cl_verifier don't match the
891 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
))
892 status
= nfserr_clid_inuse
;
895 } else if (!conf
&& unconf
896 && cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
898 * conf record not found.
899 * unconf record found.
900 * unconf->cl_confirm matches input confirm
902 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
903 status
= nfserr_clid_inuse
;
906 clientstr_hashval(unconf
->cl_recdir
);
907 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
912 move_to_confirmed(unconf
);
916 } else if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
)))
917 && (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
,
920 * conf record not found, or if conf, conf->cl_confirm does not
921 * match input confirm.
922 * unconf record not found, or if unconf, unconf->cl_confirm
923 * does not match input confirm.
925 status
= nfserr_stale_clientid
;
927 /* check that we have hit one of the cases...*/
928 status
= nfserr_clid_inuse
;
932 nfsd4_probe_callback(conf
);
938 * Open owner state (share locks)
941 /* hash tables for nfs4_stateowner */
942 #define OWNER_HASH_BITS 8
943 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
944 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
946 #define ownerid_hashval(id) \
947 ((id) & OWNER_HASH_MASK)
948 #define ownerstr_hashval(clientid, ownername) \
949 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
951 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
952 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
954 /* hash table for nfs4_file */
955 #define FILE_HASH_BITS 8
956 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
957 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
958 /* hash table for (open)nfs4_stateid */
959 #define STATEID_HASH_BITS 10
960 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
961 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
963 #define file_hashval(x) \
964 hash_ptr(x, FILE_HASH_BITS)
965 #define stateid_hashval(owner_id, file_id) \
966 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
968 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
969 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
971 /* OPEN Share state helper functions */
972 static inline struct nfs4_file
*
973 alloc_init_file(struct inode
*ino
)
975 struct nfs4_file
*fp
;
976 unsigned int hashval
= file_hashval(ino
);
978 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
980 kref_init(&fp
->fi_ref
);
981 INIT_LIST_HEAD(&fp
->fi_hash
);
982 INIT_LIST_HEAD(&fp
->fi_stateids
);
983 INIT_LIST_HEAD(&fp
->fi_delegations
);
984 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
985 fp
->fi_inode
= igrab(ino
);
986 fp
->fi_id
= current_fileid
++;
993 nfsd4_free_slab(kmem_cache_t
**slab
)
999 status
= kmem_cache_destroy(*slab
);
1005 nfsd4_free_slabs(void)
1007 nfsd4_free_slab(&stateowner_slab
);
1008 nfsd4_free_slab(&file_slab
);
1009 nfsd4_free_slab(&stateid_slab
);
1010 nfsd4_free_slab(&deleg_slab
);
1014 nfsd4_init_slabs(void)
1016 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1017 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1018 if (stateowner_slab
== NULL
)
1020 file_slab
= kmem_cache_create("nfsd4_files",
1021 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1022 if (file_slab
== NULL
)
1024 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1025 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1026 if (stateid_slab
== NULL
)
1028 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1029 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1030 if (deleg_slab
== NULL
)
1035 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1040 nfs4_free_stateowner(struct kref
*kref
)
1042 struct nfs4_stateowner
*sop
=
1043 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1044 kfree(sop
->so_owner
.data
);
1045 kmem_cache_free(stateowner_slab
, sop
);
1048 static inline struct nfs4_stateowner
*
1049 alloc_stateowner(struct xdr_netobj
*owner
)
1051 struct nfs4_stateowner
*sop
;
1053 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1054 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1055 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1056 sop
->so_owner
.len
= owner
->len
;
1057 kref_init(&sop
->so_ref
);
1060 kmem_cache_free(stateowner_slab
, sop
);
1065 static struct nfs4_stateowner
*
1066 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1067 struct nfs4_stateowner
*sop
;
1068 struct nfs4_replay
*rp
;
1069 unsigned int idhashval
;
1071 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1073 idhashval
= ownerid_hashval(current_ownerid
);
1074 INIT_LIST_HEAD(&sop
->so_idhash
);
1075 INIT_LIST_HEAD(&sop
->so_strhash
);
1076 INIT_LIST_HEAD(&sop
->so_perclient
);
1077 INIT_LIST_HEAD(&sop
->so_stateids
);
1078 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1079 INIT_LIST_HEAD(&sop
->so_close_lru
);
1081 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1082 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1083 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1084 sop
->so_is_open_owner
= 1;
1085 sop
->so_id
= current_ownerid
++;
1086 sop
->so_client
= clp
;
1087 sop
->so_seqid
= open
->op_seqid
;
1088 sop
->so_confirmed
= 0;
1089 rp
= &sop
->so_replay
;
1090 rp
->rp_status
= NFSERR_SERVERFAULT
;
1092 rp
->rp_buf
= rp
->rp_ibuf
;
1097 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1099 struct nfs4_stateowner
*lock_sop
;
1101 while (!list_empty(&open_stp
->st_lockowners
)) {
1102 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1103 struct nfs4_stateowner
, so_perstateid
);
1104 /* list_del(&open_stp->st_lockowners); */
1105 BUG_ON(lock_sop
->so_is_open_owner
);
1106 release_stateowner(lock_sop
);
1111 unhash_stateowner(struct nfs4_stateowner
*sop
)
1113 struct nfs4_stateid
*stp
;
1115 list_del(&sop
->so_idhash
);
1116 list_del(&sop
->so_strhash
);
1117 if (sop
->so_is_open_owner
)
1118 list_del(&sop
->so_perclient
);
1119 list_del(&sop
->so_perstateid
);
1120 while (!list_empty(&sop
->so_stateids
)) {
1121 stp
= list_entry(sop
->so_stateids
.next
,
1122 struct nfs4_stateid
, st_perstateowner
);
1123 if (sop
->so_is_open_owner
)
1124 release_stateid(stp
, OPEN_STATE
);
1126 release_stateid(stp
, LOCK_STATE
);
1131 release_stateowner(struct nfs4_stateowner
*sop
)
1133 unhash_stateowner(sop
);
1134 list_del(&sop
->so_close_lru
);
1135 nfs4_put_stateowner(sop
);
1139 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1140 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1141 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1143 INIT_LIST_HEAD(&stp
->st_hash
);
1144 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1145 INIT_LIST_HEAD(&stp
->st_lockowners
);
1146 INIT_LIST_HEAD(&stp
->st_perfile
);
1147 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1148 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1149 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1150 stp
->st_stateowner
= sop
;
1153 stp
->st_stateid
.si_boot
= boot_time
;
1154 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1155 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1156 stp
->st_stateid
.si_generation
= 0;
1157 stp
->st_access_bmap
= 0;
1158 stp
->st_deny_bmap
= 0;
1159 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1160 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1164 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1166 struct file
*filp
= stp
->st_vfs_file
;
1168 list_del(&stp
->st_hash
);
1169 list_del(&stp
->st_perfile
);
1170 list_del(&stp
->st_perstateowner
);
1171 if (flags
& OPEN_STATE
) {
1172 release_stateid_lockowners(stp
);
1173 stp
->st_vfs_file
= NULL
;
1175 } else if (flags
& LOCK_STATE
)
1176 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1177 put_nfs4_file(stp
->st_file
);
1178 kmem_cache_free(stateid_slab
, stp
);
1183 move_to_close_lru(struct nfs4_stateowner
*sop
)
1185 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1187 unhash_stateowner(sop
);
1188 list_add_tail(&sop
->so_close_lru
, &close_lru
);
1189 sop
->so_time
= get_seconds();
1193 release_state_owner(struct nfs4_stateid
*stp
, int flag
)
1195 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
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_stateids
))
1205 move_to_close_lru(sop
);
1209 cmp_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
, clientid_t
*clid
) {
1210 return ((sop
->so_owner
.len
== owner
->len
) &&
1211 !memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1212 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
));
1215 static struct nfs4_stateowner
*
1216 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1218 struct nfs4_stateowner
*so
= NULL
;
1220 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1221 if (cmp_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1227 /* search file_hashtbl[] for file */
1228 static struct nfs4_file
*
1229 find_file(struct inode
*ino
)
1231 unsigned int hashval
= file_hashval(ino
);
1232 struct nfs4_file
*fp
;
1234 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1235 if (fp
->fi_inode
== ino
) {
1243 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1244 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1247 set_access(unsigned int *access
, unsigned long bmap
) {
1251 for (i
= 1; i
< 4; i
++) {
1252 if (test_bit(i
, &bmap
))
1258 set_deny(unsigned int *deny
, unsigned long bmap
) {
1262 for (i
= 0; i
< 4; i
++) {
1263 if (test_bit(i
, &bmap
))
1269 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1270 unsigned int access
, deny
;
1272 set_access(&access
, stp
->st_access_bmap
);
1273 set_deny(&deny
, stp
->st_deny_bmap
);
1274 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1280 * Called to check deny when READ with all zero stateid or
1281 * WRITE with all zero or all one stateid
1284 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1286 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1287 struct nfs4_file
*fp
;
1288 struct nfs4_stateid
*stp
;
1291 dprintk("NFSD: nfs4_share_conflict\n");
1293 fp
= find_file(ino
);
1296 ret
= nfserr_share_denied
;
1297 /* Search for conflicting share reservations */
1298 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1299 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1300 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1310 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1312 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1313 put_write_access(filp
->f_dentry
->d_inode
);
1314 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1319 * Recall a delegation
1322 do_recall(void *__dp
)
1324 struct nfs4_delegation
*dp
= __dp
;
1326 daemonize("nfsv4-recall");
1328 nfsd4_cb_recall(dp
);
1333 * Spawn a thread to perform a recall on the delegation represented
1334 * by the lease (file_lock)
1336 * Called from break_lease() with lock_kernel() held.
1337 * Note: we assume break_lease will only call this *once* for any given
1341 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1343 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1344 struct task_struct
*t
;
1346 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1350 /* We're assuming the state code never drops its reference
1351 * without first removing the lease. Since we're in this lease
1352 * callback (and since the lease code is serialized by the kernel
1353 * lock) we know the server hasn't removed the lease yet, we know
1354 * it's safe to take a reference: */
1355 atomic_inc(&dp
->dl_count
);
1357 spin_lock(&recall_lock
);
1358 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1359 spin_unlock(&recall_lock
);
1361 /* only place dl_time is set. protected by lock_kernel*/
1362 dp
->dl_time
= get_seconds();
1364 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1365 fl
->fl_break_time
= jiffies
+ NFSD_LEASE_TIME
* HZ
;
1367 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1369 struct nfs4_client
*clp
= dp
->dl_client
;
1371 printk(KERN_INFO
"NFSD: Callback thread failed for "
1372 "for client (clientid %08x/%08x)\n",
1373 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1374 nfs4_put_delegation(dp
);
1379 * The file_lock is being reapd.
1381 * Called by locks_free_lock() with lock_kernel() held.
1384 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1386 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1388 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1390 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1392 dp
->dl_flock
= NULL
;
1396 * Set the delegation file_lock back pointer.
1398 * Called from __setlease() with lock_kernel() held.
1401 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1403 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1405 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1412 * Called from __setlease() with lock_kernel() held
1415 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1417 struct nfs4_delegation
*onlistd
=
1418 (struct nfs4_delegation
*)onlist
->fl_owner
;
1419 struct nfs4_delegation
*tryd
=
1420 (struct nfs4_delegation
*)try->fl_owner
;
1422 if (onlist
->fl_lmops
!= try->fl_lmops
)
1425 return onlistd
->dl_client
== tryd
->dl_client
;
1430 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1433 return lease_modify(onlist
, arg
);
1438 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1439 .fl_break
= nfsd_break_deleg_cb
,
1440 .fl_release_private
= nfsd_release_deleg_cb
,
1441 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1442 .fl_mylease
= nfsd_same_client_deleg_cb
,
1443 .fl_change
= nfsd_change_deleg_cb
,
1448 * nfsd4_process_open1()
1449 * lookup stateowner.
1461 * called with nfs4_lock_state() held.
1464 nfsd4_process_open1(struct nfsd4_open
*open
)
1467 clientid_t
*clientid
= &open
->op_clientid
;
1468 struct nfs4_client
*clp
= NULL
;
1469 unsigned int strhashval
;
1470 struct nfs4_stateowner
*sop
= NULL
;
1472 status
= nfserr_inval
;
1473 if (!check_name(open
->op_owner
))
1476 if (STALE_CLIENTID(&open
->op_clientid
))
1477 return nfserr_stale_clientid
;
1479 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1480 sop
= find_openstateowner_str(strhashval
, open
);
1482 open
->op_stateowner
= sop
;
1483 /* check for replay */
1484 if (open
->op_seqid
== sop
->so_seqid
){
1485 if (sop
->so_replay
.rp_buflen
)
1486 return NFSERR_REPLAY_ME
;
1488 /* The original OPEN failed so spectacularly
1489 * that we don't even have replay data saved!
1490 * Therefore, we have no choice but to continue
1491 * processing this OPEN; presumably, we'll
1492 * fail again for the same reason.
1494 dprintk("nfsd4_process_open1:"
1495 " replay with no replay cache\n");
1498 } else if (sop
->so_confirmed
) {
1499 if (open
->op_seqid
== sop
->so_seqid
+ 1)
1501 status
= nfserr_bad_seqid
;
1504 /* If we get here, we received an OPEN for an
1505 * unconfirmed nfs4_stateowner. Since the seqid's are
1506 * different, purge the existing nfs4_stateowner, and
1507 * instantiate a new one.
1509 clp
= sop
->so_client
;
1510 release_stateowner(sop
);
1513 /* nfs4_stateowner not found.
1514 * Verify clientid and instantiate new nfs4_stateowner.
1515 * If verify fails this is presumably the result of the
1516 * client's lease expiring.
1518 status
= nfserr_expired
;
1519 clp
= find_confirmed_client(clientid
);
1523 status
= nfserr_resource
;
1524 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1527 open
->op_stateowner
= sop
;
1530 renew_client(sop
->so_client
);
1532 if (status
&& open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1533 status
= nfserr_reclaim_bad
;
1538 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1540 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1541 return nfserr_openmode
;
1546 static struct nfs4_delegation
*
1547 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1549 struct nfs4_delegation
*dp
;
1551 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1552 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1559 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1560 struct nfs4_delegation
**dp
)
1563 int status
= nfserr_bad_stateid
;
1565 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1568 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1569 RD_STATE
: WR_STATE
;
1570 status
= nfs4_check_delegmode(*dp
, flags
);
1574 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1578 open
->op_stateowner
->so_confirmed
= 1;
1583 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1585 struct nfs4_stateid
*local
;
1586 int status
= nfserr_share_denied
;
1587 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1589 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1590 /* ignore lock owners */
1591 if (local
->st_stateowner
->so_is_open_owner
== 0)
1593 /* remember if we have seen this open owner */
1594 if (local
->st_stateowner
== sop
)
1596 /* check for conflicting share reservations */
1597 if (!test_share(local
, open
))
1605 static inline struct nfs4_stateid
*
1606 nfs4_alloc_stateid(void)
1608 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1612 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1613 struct nfs4_delegation
*dp
,
1614 struct svc_fh
*cur_fh
, int flags
)
1616 struct nfs4_stateid
*stp
;
1618 stp
= nfs4_alloc_stateid();
1620 return nfserr_resource
;
1623 get_file(dp
->dl_vfs_file
);
1624 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1627 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1630 if (status
== nfserr_dropit
)
1631 status
= nfserr_jukebox
;
1632 kmem_cache_free(stateid_slab
, stp
);
1641 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1642 struct nfsd4_open
*open
)
1644 struct iattr iattr
= {
1645 .ia_valid
= ATTR_SIZE
,
1648 if (!open
->op_truncate
)
1650 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1652 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1656 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1658 struct file
*filp
= stp
->st_vfs_file
;
1659 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1660 unsigned int share_access
;
1663 set_access(&share_access
, stp
->st_access_bmap
);
1664 share_access
= ~share_access
;
1665 share_access
&= open
->op_share_access
;
1667 if (!(share_access
& NFS4_SHARE_ACCESS_WRITE
))
1668 return nfsd4_truncate(rqstp
, cur_fh
, open
);
1670 status
= get_write_access(inode
);
1672 return nfserrno(status
);
1673 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1675 put_write_access(inode
);
1678 /* remember the open */
1679 filp
->f_mode
= (filp
->f_mode
| FMODE_WRITE
) & ~FMODE_READ
;
1680 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1681 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1687 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1689 nfs4_set_claim_prev(struct nfsd4_open
*open
, int *status
)
1691 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1693 *status
= nfserr_reclaim_bad
;
1695 open
->op_stateowner
->so_confirmed
= 1;
1696 open
->op_stateowner
->so_seqid
--;
1702 * Attempt to hand out a delegation.
1705 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1707 struct nfs4_delegation
*dp
;
1708 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1709 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1710 struct file_lock fl
, *flp
= &fl
;
1711 int status
, flag
= 0;
1713 flag
= NFS4_OPEN_DELEGATE_NONE
;
1714 open
->op_recall
= 0;
1715 switch (open
->op_claim_type
) {
1716 case NFS4_OPEN_CLAIM_PREVIOUS
:
1717 if (!atomic_read(&cb
->cb_set
))
1718 open
->op_recall
= 1;
1719 flag
= open
->op_delegate_type
;
1720 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1723 case NFS4_OPEN_CLAIM_NULL
:
1724 /* Let's not give out any delegations till everyone's
1725 * had the chance to reclaim theirs.... */
1726 if (nfs4_in_grace())
1728 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1730 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1731 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1733 flag
= NFS4_OPEN_DELEGATE_READ
;
1739 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1741 flag
= NFS4_OPEN_DELEGATE_NONE
;
1744 locks_init_lock(&fl
);
1745 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1746 fl
.fl_flags
= FL_LEASE
;
1747 fl
.fl_end
= OFFSET_MAX
;
1748 fl
.fl_owner
= (fl_owner_t
)dp
;
1749 fl
.fl_file
= stp
->st_vfs_file
;
1750 fl
.fl_pid
= current
->tgid
;
1752 /* setlease checks to see if delegation should be handed out.
1753 * the lock_manager callbacks fl_mylease and fl_change are used
1755 if ((status
= setlease(stp
->st_vfs_file
,
1756 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1757 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1758 unhash_delegation(dp
);
1759 flag
= NFS4_OPEN_DELEGATE_NONE
;
1763 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1765 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1766 dp
->dl_stateid
.si_boot
,
1767 dp
->dl_stateid
.si_stateownerid
,
1768 dp
->dl_stateid
.si_fileid
,
1769 dp
->dl_stateid
.si_generation
);
1771 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1772 && flag
== NFS4_OPEN_DELEGATE_NONE
1773 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1774 printk("NFSD: WARNING: refusing delegation reclaim\n");
1775 open
->op_delegate_type
= flag
;
1779 * called with nfs4_lock_state() held.
1782 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1784 struct nfs4_file
*fp
= NULL
;
1785 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1786 struct nfs4_stateid
*stp
= NULL
;
1787 struct nfs4_delegation
*dp
= NULL
;
1790 status
= nfserr_inval
;
1791 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1794 * Lookup file; if found, lookup stateid and check open request,
1795 * and check for delegations in the process of being recalled.
1796 * If not found, create the nfs4_file struct
1798 fp
= find_file(ino
);
1800 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1802 status
= nfs4_check_deleg(fp
, open
, &dp
);
1806 status
= nfserr_bad_stateid
;
1807 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1809 status
= nfserr_resource
;
1810 fp
= alloc_init_file(ino
);
1816 * OPEN the file, or upgrade an existing OPEN.
1817 * If truncate fails, the OPEN fails.
1820 /* Stateid was found, this is an OPEN upgrade */
1821 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1825 /* Stateid was not found, this is a new OPEN */
1827 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1831 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1834 init_stateid(stp
, fp
, open
);
1835 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1837 release_stateid(stp
, OPEN_STATE
);
1841 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1844 * Attempt to hand out a delegation. No error return, because the
1845 * OPEN succeeds even if we fail.
1847 nfs4_open_delegation(current_fh
, open
, stp
);
1851 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1852 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1853 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1857 /* CLAIM_PREVIOUS has different error returns */
1858 nfs4_set_claim_prev(open
, &status
);
1860 * To finish the open response, we just need to set the rflags.
1862 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1863 if (!open
->op_stateowner
->so_confirmed
)
1864 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1869 static struct workqueue_struct
*laundry_wq
;
1870 static struct work_struct laundromat_work
;
1871 static void laundromat_main(void *);
1872 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1875 nfsd4_renew(clientid_t
*clid
)
1877 struct nfs4_client
*clp
;
1881 dprintk("process_renew(%08x/%08x): starting\n",
1882 clid
->cl_boot
, clid
->cl_id
);
1883 status
= nfserr_stale_clientid
;
1884 if (STALE_CLIENTID(clid
))
1886 clp
= find_confirmed_client(clid
);
1887 status
= nfserr_expired
;
1889 /* We assume the client took too long to RENEW. */
1890 dprintk("nfsd4_renew: clientid not found!\n");
1894 status
= nfserr_cb_path_down
;
1895 if (!list_empty(&clp
->cl_delegations
)
1896 && !atomic_read(&clp
->cl_callback
.cb_set
))
1900 nfs4_unlock_state();
1907 dprintk("NFSD: end of grace period\n");
1912 nfs4_laundromat(void)
1914 struct nfs4_client
*clp
;
1915 struct nfs4_stateowner
*sop
;
1916 struct nfs4_delegation
*dp
;
1917 struct list_head
*pos
, *next
, reaplist
;
1918 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1919 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1920 time_t u
, test_val
= NFSD_LEASE_TIME
;
1924 dprintk("NFSD: laundromat service - starting\n");
1927 list_for_each_safe(pos
, next
, &client_lru
) {
1928 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1929 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1930 t
= clp
->cl_time
- cutoff
;
1931 if (clientid_val
> t
)
1935 dprintk("NFSD: purging unused client (clientid %08x)\n",
1936 clp
->cl_clientid
.cl_id
);
1939 INIT_LIST_HEAD(&reaplist
);
1940 spin_lock(&recall_lock
);
1941 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1942 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1943 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1944 u
= dp
->dl_time
- cutoff
;
1949 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1951 list_move(&dp
->dl_recall_lru
, &reaplist
);
1953 spin_unlock(&recall_lock
);
1954 list_for_each_safe(pos
, next
, &reaplist
) {
1955 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1956 list_del_init(&dp
->dl_recall_lru
);
1957 unhash_delegation(dp
);
1959 test_val
= NFSD_LEASE_TIME
;
1960 list_for_each_safe(pos
, next
, &close_lru
) {
1961 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1962 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1963 u
= sop
->so_time
- cutoff
;
1968 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1970 list_del(&sop
->so_close_lru
);
1971 nfs4_put_stateowner(sop
);
1973 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1974 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1975 nfs4_unlock_state();
1976 return clientid_val
;
1980 laundromat_main(void *not_used
)
1984 t
= nfs4_laundromat();
1985 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1986 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1989 /* search ownerid_hashtbl[] and close_lru for stateid owner
1990 * (stateid->si_stateownerid)
1992 static struct nfs4_stateowner
*
1993 find_openstateowner_id(u32 st_id
, int flags
) {
1994 struct nfs4_stateowner
*local
= NULL
;
1996 dprintk("NFSD: find_openstateowner_id %d\n", st_id
);
1997 if (flags
& CLOSE_STATE
) {
1998 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1999 if (local
->so_id
== st_id
)
2007 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2009 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
2013 STALE_STATEID(stateid_t
*stateid
)
2015 if (stateid
->si_boot
== boot_time
)
2017 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2018 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2019 stateid
->si_generation
);
2024 access_permit_read(unsigned long access_bmap
)
2026 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2027 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2028 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2032 access_permit_write(unsigned long access_bmap
)
2034 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2035 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2039 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2041 int status
= nfserr_openmode
;
2043 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2045 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2053 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2055 /* Trying to call delegreturn with a special stateid? Yuch: */
2056 if (!(flags
& (RD_STATE
| WR_STATE
)))
2057 return nfserr_bad_stateid
;
2058 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2060 else if (nfs4_in_grace()) {
2061 /* Answer in remaining cases depends on existance of
2062 * conflicting state; so we must wait out the grace period. */
2063 return nfserr_grace
;
2064 } else if (flags
& WR_STATE
)
2065 return nfs4_share_conflict(current_fh
,
2066 NFS4_SHARE_DENY_WRITE
);
2067 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2068 return nfs4_share_conflict(current_fh
,
2069 NFS4_SHARE_DENY_READ
);
2073 * Allow READ/WRITE during grace period on recovered state only for files
2074 * that are not able to provide mandatory locking.
2077 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2079 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2080 && MANDATORY_LOCK(inode
);
2084 * Checks for stateid operations
2087 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2089 struct nfs4_stateid
*stp
= NULL
;
2090 struct nfs4_delegation
*dp
= NULL
;
2092 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2095 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2096 stateid
->si_boot
, stateid
->si_stateownerid
,
2097 stateid
->si_fileid
, stateid
->si_generation
);
2101 if (io_during_grace_disallowed(ino
, flags
))
2102 return nfserr_grace
;
2104 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2105 return check_special_stateids(current_fh
, stateid
, flags
);
2108 status
= nfserr_stale_stateid
;
2109 if (STALE_STATEID(stateid
))
2113 status
= nfserr_bad_stateid
;
2114 if (!stateid
->si_fileid
) { /* delegation stateid */
2115 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2116 dprintk("NFSD: delegation stateid not found\n");
2117 if (nfs4_in_grace())
2118 status
= nfserr_grace
;
2121 stidp
= &dp
->dl_stateid
;
2122 } else { /* open or lock stateid */
2123 if (!(stp
= find_stateid(stateid
, flags
))) {
2124 dprintk("NFSD: open or lock stateid not found\n");
2125 if (nfs4_in_grace())
2126 status
= nfserr_grace
;
2129 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2131 if (!stp
->st_stateowner
->so_confirmed
)
2133 stidp
= &stp
->st_stateid
;
2135 if (stateid
->si_generation
> stidp
->si_generation
)
2139 status
= nfserr_old_stateid
;
2140 if (stateid
->si_generation
< stidp
->si_generation
)
2143 if ((status
= nfs4_check_openmode(stp
,flags
)))
2145 renew_client(stp
->st_stateowner
->so_client
);
2147 *filpp
= stp
->st_vfs_file
;
2149 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2151 renew_client(dp
->dl_client
);
2152 if (flags
& DELEG_RET
)
2153 unhash_delegation(dp
);
2155 *filpp
= dp
->dl_vfs_file
;
2164 * Checks for sequence id mutating operations.
2167 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
)
2170 struct nfs4_stateid
*stp
;
2171 struct nfs4_stateowner
*sop
;
2173 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2174 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2175 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2176 stateid
->si_generation
);
2181 status
= nfserr_bad_stateid
;
2182 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2183 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2187 status
= nfserr_stale_stateid
;
2188 if (STALE_STATEID(stateid
))
2191 * We return BAD_STATEID if filehandle doesn't match stateid,
2192 * the confirmed flag is incorrecly set, or the generation
2193 * number is incorrect.
2194 * If there is no entry in the openfile table for this id,
2195 * we can't always return BAD_STATEID;
2196 * this might be a retransmitted CLOSE which has arrived after
2197 * the openfile has been released.
2199 if (!(stp
= find_stateid(stateid
, flags
)))
2200 goto no_nfs4_stateid
;
2202 status
= nfserr_bad_stateid
;
2204 /* for new lock stateowners:
2205 * check that the lock->v.new.open_stateid
2206 * refers to an open stateowner
2208 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2209 * as the open_stateid->st_stateowner->so_client->clientid
2212 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2213 struct nfs4_client
*clp
= sop
->so_client
;
2215 if (!sop
->so_is_open_owner
)
2217 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2221 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2222 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2227 *sopp
= sop
= stp
->st_stateowner
;
2230 * We now validate the seqid and stateid generation numbers.
2231 * For the moment, we ignore the possibility of
2232 * generation number wraparound.
2234 if (seqid
!= sop
->so_seqid
+ 1)
2237 if (sop
->so_confirmed
) {
2238 if (flags
& CONFIRM
) {
2239 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2244 if (!(flags
& CONFIRM
)) {
2245 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2249 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2250 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2254 status
= nfserr_old_stateid
;
2255 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2256 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2259 /* XXX renew the client lease here */
2268 * We determine whether this is a bad stateid or a replay,
2269 * starting by trying to look up the stateowner.
2270 * If stateowner is not found - stateid is bad.
2272 if (!(sop
= find_openstateowner_id(stateid
->si_stateownerid
, flags
))) {
2273 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2274 status
= nfserr_bad_stateid
;
2280 if (seqid
== sop
->so_seqid
) {
2281 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2282 /* indicate replay to calling function */
2283 status
= NFSERR_REPLAY_ME
;
2285 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop
->so_seqid
+1, seqid
);
2288 status
= nfserr_bad_seqid
;
2294 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
)
2297 struct nfs4_stateowner
*sop
;
2298 struct nfs4_stateid
*stp
;
2300 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2301 (int)current_fh
->fh_dentry
->d_name
.len
,
2302 current_fh
->fh_dentry
->d_name
.name
);
2304 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2309 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2310 &oc
->oc_req_stateid
,
2311 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2312 &oc
->oc_stateowner
, &stp
, NULL
)))
2315 sop
= oc
->oc_stateowner
;
2316 sop
->so_confirmed
= 1;
2317 update_stateid(&stp
->st_stateid
);
2318 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2319 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2320 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2321 stp
->st_stateid
.si_boot
,
2322 stp
->st_stateid
.si_stateownerid
,
2323 stp
->st_stateid
.si_fileid
,
2324 stp
->st_stateid
.si_generation
);
2326 if (oc
->oc_stateowner
)
2327 nfs4_get_stateowner(oc
->oc_stateowner
);
2328 nfs4_unlock_state();
2334 * unset all bits in union bitmap (bmap) that
2335 * do not exist in share (from successful OPEN_DOWNGRADE)
2338 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2341 for (i
= 1; i
< 4; i
++) {
2342 if ((i
& access
) != i
)
2343 __clear_bit(i
, bmap
);
2348 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2351 for (i
= 0; i
< 4; i
++) {
2352 if ((i
& deny
) != i
)
2353 __clear_bit(i
, bmap
);
2358 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
)
2361 struct nfs4_stateid
*stp
;
2362 unsigned int share_access
;
2364 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2365 (int)current_fh
->fh_dentry
->d_name
.len
,
2366 current_fh
->fh_dentry
->d_name
.name
);
2368 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2369 return nfserr_inval
;
2372 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2374 CHECK_FH
| OPEN_STATE
,
2375 &od
->od_stateowner
, &stp
, NULL
)))
2378 status
= nfserr_inval
;
2379 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2380 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2381 stp
->st_access_bmap
, od
->od_share_access
);
2384 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2385 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2386 stp
->st_deny_bmap
, od
->od_share_deny
);
2389 set_access(&share_access
, stp
->st_access_bmap
);
2390 nfs4_file_downgrade(stp
->st_vfs_file
,
2391 share_access
& ~od
->od_share_access
);
2393 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2394 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2396 update_stateid(&stp
->st_stateid
);
2397 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2400 if (od
->od_stateowner
)
2401 nfs4_get_stateowner(od
->od_stateowner
);
2402 nfs4_unlock_state();
2407 * nfs4_unlock_state() called after encode
2410 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
)
2413 struct nfs4_stateid
*stp
;
2415 dprintk("NFSD: nfsd4_close on file %.*s\n",
2416 (int)current_fh
->fh_dentry
->d_name
.len
,
2417 current_fh
->fh_dentry
->d_name
.name
);
2420 /* check close_lru for replay */
2421 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2423 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2424 &close
->cl_stateowner
, &stp
, NULL
)))
2427 * Return success, but first update the stateid.
2430 update_stateid(&stp
->st_stateid
);
2431 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2433 /* release_state_owner() calls nfsd_close() if needed */
2434 release_state_owner(stp
, OPEN_STATE
);
2436 if (close
->cl_stateowner
)
2437 nfs4_get_stateowner(close
->cl_stateowner
);
2438 nfs4_unlock_state();
2443 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2447 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2451 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2452 nfs4_unlock_state();
2459 * Lock owner state (byte-range locks)
2461 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2462 #define LOCK_HASH_BITS 8
2463 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2464 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2466 #define lockownerid_hashval(id) \
2467 ((id) & LOCK_HASH_MASK)
2469 static inline unsigned int
2470 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2471 struct xdr_netobj
*ownername
)
2473 return (file_hashval(inode
) + cl_id
2474 + opaque_hashval(ownername
->data
, ownername
->len
))
2478 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2479 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2480 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2482 static struct nfs4_stateid
*
2483 find_stateid(stateid_t
*stid
, int flags
)
2485 struct nfs4_stateid
*local
= NULL
;
2486 u32 st_id
= stid
->si_stateownerid
;
2487 u32 f_id
= stid
->si_fileid
;
2488 unsigned int hashval
;
2490 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2491 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2492 hashval
= stateid_hashval(st_id
, f_id
);
2493 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2494 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2495 (local
->st_stateid
.si_fileid
== f_id
))
2499 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2500 hashval
= stateid_hashval(st_id
, f_id
);
2501 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2502 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2503 (local
->st_stateid
.si_fileid
== f_id
))
2507 printk("NFSD: find_stateid: ERROR: no state flag\n");
2511 static struct nfs4_delegation
*
2512 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2514 struct nfs4_file
*fp
;
2515 struct nfs4_delegation
*dl
;
2517 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2518 stid
->si_boot
, stid
->si_stateownerid
,
2519 stid
->si_fileid
, stid
->si_generation
);
2521 fp
= find_file(ino
);
2524 dl
= find_delegation_file(fp
, stid
);
2530 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2531 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2532 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2533 * locking, this prevents us from being completely protocol-compliant. The
2534 * real solution to this problem is to start using unsigned file offsets in
2535 * the VFS, but this is a very deep change!
2538 nfs4_transform_lock_offset(struct file_lock
*lock
)
2540 if (lock
->fl_start
< 0)
2541 lock
->fl_start
= OFFSET_MAX
;
2542 if (lock
->fl_end
< 0)
2543 lock
->fl_end
= OFFSET_MAX
;
2547 nfs4_verify_lock_stateowner(struct nfs4_stateowner
*sop
, unsigned int hashval
)
2549 struct nfs4_stateowner
*local
= NULL
;
2552 if (hashval
>= LOCK_HASH_SIZE
)
2554 list_for_each_entry(local
, &lock_ownerid_hashtbl
[hashval
], so_idhash
) {
2566 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2568 struct nfs4_stateowner
*sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2569 unsigned int hval
= lockownerid_hashval(sop
->so_id
);
2571 deny
->ld_sop
= NULL
;
2572 if (nfs4_verify_lock_stateowner(sop
, hval
)) {
2573 kref_get(&sop
->so_ref
);
2575 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2577 deny
->ld_start
= fl
->fl_start
;
2578 deny
->ld_length
= ~(u64
)0;
2579 if (fl
->fl_end
!= ~(u64
)0)
2580 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2581 deny
->ld_type
= NFS4_READ_LT
;
2582 if (fl
->fl_type
!= F_RDLCK
)
2583 deny
->ld_type
= NFS4_WRITE_LT
;
2586 static struct nfs4_stateowner
*
2587 find_lockstateowner(struct xdr_netobj
*owner
, clientid_t
*clid
)
2589 struct nfs4_stateowner
*local
= NULL
;
2592 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2593 list_for_each_entry(local
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2594 if (!cmp_owner_str(local
, owner
, clid
))
2602 static struct nfs4_stateowner
*
2603 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2604 struct xdr_netobj
*owner
)
2606 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2607 struct nfs4_stateowner
*op
;
2609 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2610 if (cmp_owner_str(op
, owner
, clid
))
2617 * Alloc a lock owner structure.
2618 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2621 * strhashval = lock_ownerstr_hashval
2622 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2625 static struct nfs4_stateowner
*
2626 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2627 struct nfs4_stateowner
*sop
;
2628 struct nfs4_replay
*rp
;
2629 unsigned int idhashval
;
2631 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2633 idhashval
= lockownerid_hashval(current_ownerid
);
2634 INIT_LIST_HEAD(&sop
->so_idhash
);
2635 INIT_LIST_HEAD(&sop
->so_strhash
);
2636 INIT_LIST_HEAD(&sop
->so_perclient
);
2637 INIT_LIST_HEAD(&sop
->so_stateids
);
2638 INIT_LIST_HEAD(&sop
->so_perstateid
);
2639 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2641 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2642 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2643 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2644 sop
->so_is_open_owner
= 0;
2645 sop
->so_id
= current_ownerid
++;
2646 sop
->so_client
= clp
;
2647 sop
->so_seqid
= lock
->lk_new_lock_seqid
- 1;
2648 sop
->so_confirmed
= 1;
2649 rp
= &sop
->so_replay
;
2650 rp
->rp_status
= NFSERR_SERVERFAULT
;
2652 rp
->rp_buf
= rp
->rp_ibuf
;
2656 static struct nfs4_stateid
*
2657 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2659 struct nfs4_stateid
*stp
;
2660 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2662 stp
= nfs4_alloc_stateid();
2665 INIT_LIST_HEAD(&stp
->st_hash
);
2666 INIT_LIST_HEAD(&stp
->st_perfile
);
2667 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2668 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2669 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2670 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2671 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2672 stp
->st_stateowner
= sop
;
2675 stp
->st_stateid
.si_boot
= boot_time
;
2676 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2677 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2678 stp
->st_stateid
.si_generation
= 0;
2679 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2680 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2681 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2688 check_lock_length(u64 offset
, u64 length
)
2690 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2691 LOFF_OVERFLOW(offset
, length
)));
2698 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
)
2700 struct nfs4_stateowner
*lock_sop
= NULL
, *open_sop
= NULL
;
2701 struct nfs4_stateid
*lock_stp
;
2703 struct file_lock file_lock
;
2704 struct file_lock
*conflock
;
2706 unsigned int strhashval
;
2708 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2709 (long long) lock
->lk_offset
,
2710 (long long) lock
->lk_length
);
2712 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2713 return nfserr_grace
;
2714 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2715 return nfserr_no_grace
;
2717 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2718 return nfserr_inval
;
2722 if (lock
->lk_is_new
) {
2724 * Client indicates that this is a new lockowner.
2725 * Use open owner and open stateid to create lock owner and lock
2728 struct nfs4_stateid
*open_stp
= NULL
;
2729 struct nfs4_file
*fp
;
2731 status
= nfserr_stale_clientid
;
2732 if (STALE_CLIENTID(&lock
->lk_new_clientid
)) {
2733 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2737 /* is the new lock seqid presented by the client zero? */
2738 status
= nfserr_bad_seqid
;
2739 if (lock
->v
.new.lock_seqid
!= 0)
2742 /* validate and update open stateid and open seqid */
2743 status
= nfs4_preprocess_seqid_op(current_fh
,
2744 lock
->lk_new_open_seqid
,
2745 &lock
->lk_new_open_stateid
,
2746 CHECK_FH
| OPEN_STATE
,
2747 &open_sop
, &open_stp
,
2748 &lock
->v
.new.clientid
);
2750 if (lock
->lk_reclaim
)
2751 status
= nfserr_reclaim_bad
;
2754 /* create lockowner and lock stateid */
2755 fp
= open_stp
->st_file
;
2756 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2757 open_sop
->so_client
->cl_clientid
.cl_id
,
2758 &lock
->v
.new.owner
);
2760 * If we already have this lock owner, the client is in
2761 * error (or our bookeeping is wrong!)
2762 * for asking for a 'new lock'.
2764 status
= nfserr_bad_stateid
;
2765 lock_sop
= find_lockstateowner(&lock
->v
.new.owner
,
2766 &lock
->v
.new.clientid
);
2769 status
= nfserr_resource
;
2770 if (!(lock
->lk_stateowner
= alloc_init_lock_stateowner(strhashval
, open_sop
->so_client
, open_stp
, lock
)))
2772 if ((lock_stp
= alloc_init_lock_stateid(lock
->lk_stateowner
,
2773 fp
, open_stp
)) == NULL
) {
2774 release_stateowner(lock
->lk_stateowner
);
2775 lock
->lk_stateowner
= NULL
;
2778 /* bump the open seqid used to create the lock */
2779 open_sop
->so_seqid
++;
2781 /* lock (lock owner + lock stateid) already exists */
2782 status
= nfs4_preprocess_seqid_op(current_fh
,
2783 lock
->lk_old_lock_seqid
,
2784 &lock
->lk_old_lock_stateid
,
2785 CHECK_FH
| LOCK_STATE
,
2786 &lock
->lk_stateowner
, &lock_stp
, NULL
);
2790 /* lock->lk_stateowner and lock_stp have been created or found */
2791 filp
= lock_stp
->st_vfs_file
;
2793 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2794 printk("NFSD: nfsd4_lock: permission denied!\n");
2798 locks_init_lock(&file_lock
);
2799 switch (lock
->lk_type
) {
2802 file_lock
.fl_type
= F_RDLCK
;
2805 case NFS4_WRITEW_LT
:
2806 file_lock
.fl_type
= F_WRLCK
;
2809 status
= nfserr_inval
;
2812 file_lock
.fl_owner
= (fl_owner_t
) lock
->lk_stateowner
;
2813 file_lock
.fl_pid
= current
->tgid
;
2814 file_lock
.fl_file
= filp
;
2815 file_lock
.fl_flags
= FL_POSIX
;
2817 file_lock
.fl_start
= lock
->lk_offset
;
2818 if ((lock
->lk_length
== ~(u64
)0) ||
2819 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2820 file_lock
.fl_end
= ~(u64
)0;
2822 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2823 nfs4_transform_lock_offset(&file_lock
);
2826 * Try to lock the file in the VFS.
2827 * Note: locks.c uses the BKL to protect the inode's lock list.
2830 status
= posix_lock_file(filp
, &file_lock
);
2831 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2832 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2833 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status
);
2835 case 0: /* success! */
2836 update_stateid(&lock_stp
->st_stateid
);
2837 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2841 goto conflicting_lock
;
2843 status
= nfserr_deadlock
;
2845 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status
);
2846 goto out_destroy_new_stateid
;
2850 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2851 status
= nfserr_denied
;
2852 /* XXX There is a race here. Future patch needed to provide
2853 * an atomic posix_lock_and_test_file
2855 if (!(conflock
= posix_test_lock(filp
, &file_lock
))) {
2856 status
= nfserr_serverfault
;
2859 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
2861 out_destroy_new_stateid
:
2862 if (lock
->lk_is_new
) {
2863 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2865 * An error encountered after instantiation of the new
2866 * stateid has forced us to destroy it.
2868 if (!seqid_mutating_err(status
))
2869 open_sop
->so_seqid
--;
2871 release_state_owner(lock_stp
, LOCK_STATE
);
2874 if (lock
->lk_stateowner
)
2875 nfs4_get_stateowner(lock
->lk_stateowner
);
2876 nfs4_unlock_state();
2884 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2886 struct inode
*inode
;
2888 struct file_lock file_lock
;
2889 struct file_lock
*conflicting_lock
;
2892 if (nfs4_in_grace())
2893 return nfserr_grace
;
2895 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2896 return nfserr_inval
;
2898 lockt
->lt_stateowner
= NULL
;
2901 status
= nfserr_stale_clientid
;
2902 if (STALE_CLIENTID(&lockt
->lt_clientid
)) {
2903 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2907 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2908 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2909 if (status
== nfserr_symlink
)
2910 status
= nfserr_inval
;
2914 inode
= current_fh
->fh_dentry
->d_inode
;
2915 locks_init_lock(&file_lock
);
2916 switch (lockt
->lt_type
) {
2919 file_lock
.fl_type
= F_RDLCK
;
2922 case NFS4_WRITEW_LT
:
2923 file_lock
.fl_type
= F_WRLCK
;
2926 printk("NFSD: nfs4_lockt: bad lock type!\n");
2927 status
= nfserr_inval
;
2931 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2932 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2933 if (lockt
->lt_stateowner
)
2934 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2935 file_lock
.fl_pid
= current
->tgid
;
2936 file_lock
.fl_flags
= FL_POSIX
;
2938 file_lock
.fl_start
= lockt
->lt_offset
;
2939 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2940 file_lock
.fl_end
= ~(u64
)0;
2942 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2944 nfs4_transform_lock_offset(&file_lock
);
2946 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2947 * since LOCKT doesn't require an OPEN, and therefore a struct
2948 * file may not exist, pass posix_test_lock a struct file with
2949 * only the dentry:inode set.
2951 memset(&file
, 0, sizeof (struct file
));
2952 file
.f_dentry
= current_fh
->fh_dentry
;
2955 conflicting_lock
= posix_test_lock(&file
, &file_lock
);
2956 if (conflicting_lock
) {
2957 status
= nfserr_denied
;
2958 nfs4_set_lock_denied(conflicting_lock
, &lockt
->lt_denied
);
2961 nfs4_unlock_state();
2966 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
)
2968 struct nfs4_stateid
*stp
;
2969 struct file
*filp
= NULL
;
2970 struct file_lock file_lock
;
2973 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2974 (long long) locku
->lu_offset
,
2975 (long long) locku
->lu_length
);
2977 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2978 return nfserr_inval
;
2982 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
2985 CHECK_FH
| LOCK_STATE
,
2986 &locku
->lu_stateowner
, &stp
, NULL
)))
2989 filp
= stp
->st_vfs_file
;
2991 locks_init_lock(&file_lock
);
2992 file_lock
.fl_type
= F_UNLCK
;
2993 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2994 file_lock
.fl_pid
= current
->tgid
;
2995 file_lock
.fl_file
= filp
;
2996 file_lock
.fl_flags
= FL_POSIX
;
2997 file_lock
.fl_start
= locku
->lu_offset
;
2999 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
3000 file_lock
.fl_end
= ~(u64
)0;
3002 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
3003 nfs4_transform_lock_offset(&file_lock
);
3006 * Try to unlock the file in the VFS.
3008 status
= posix_lock_file(filp
, &file_lock
);
3009 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
3010 file_lock
.fl_ops
->fl_release_private(&file_lock
);
3012 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
3016 * OK, unlock succeeded; the only thing left to do is update the stateid.
3018 update_stateid(&stp
->st_stateid
);
3019 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3022 if (locku
->lu_stateowner
)
3023 nfs4_get_stateowner(locku
->lu_stateowner
);
3024 nfs4_unlock_state();
3028 status
= nfserrno(status
);
3034 * 1: locks held by lockowner
3035 * 0: no locks held by lockowner
3038 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3040 struct file_lock
**flpp
;
3041 struct inode
*inode
= filp
->f_dentry
->d_inode
;
3045 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3046 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
)
3056 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
3058 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3059 struct nfs4_stateowner
*local
= NULL
;
3060 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3063 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3064 clid
->cl_boot
, clid
->cl_id
);
3066 /* XXX check for lease expiration */
3068 status
= nfserr_stale_clientid
;
3069 if (STALE_CLIENTID(clid
)) {
3070 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3077 local
= find_lockstateowner(owner
, clid
);
3079 struct nfs4_stateid
*stp
;
3081 /* check for any locks held by any stateid
3082 * associated with the (lock) stateowner */
3083 status
= nfserr_locks_held
;
3084 list_for_each_entry(stp
, &local
->so_stateids
,
3086 if (check_for_locks(stp
->st_vfs_file
, local
))
3089 /* no locks held by (lock) stateowner */
3091 release_stateowner(local
);
3094 nfs4_unlock_state();
3098 static inline struct nfs4_client_reclaim
*
3101 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3105 * failure => all reset bets are off, nfserr_no_grace...
3108 nfs4_client_to_reclaim(char *name
)
3110 unsigned int strhashval
;
3111 struct nfs4_client_reclaim
*crp
= NULL
;
3113 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3114 crp
= alloc_reclaim();
3117 strhashval
= clientstr_hashval(name
);
3118 INIT_LIST_HEAD(&crp
->cr_strhash
);
3119 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3120 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3121 reclaim_str_hashtbl_size
++;
3126 nfs4_release_reclaim(void)
3128 struct nfs4_client_reclaim
*crp
= NULL
;
3131 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3132 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3133 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3134 struct nfs4_client_reclaim
, cr_strhash
);
3135 list_del(&crp
->cr_strhash
);
3137 reclaim_str_hashtbl_size
--;
3140 BUG_ON(reclaim_str_hashtbl_size
);
3144 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3145 static 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 with recdir %s\n",
3159 clp
->cl_name
.len
, clp
->cl_name
.data
,
3162 /* find clp->cl_name in reclaim_str_hashtbl */
3163 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3164 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3165 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3173 * Called from OPEN. Look for clientid in reclaim list.
3176 nfs4_check_open_reclaim(clientid_t
*clid
)
3178 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3181 /* initialization to perform at module load time: */
3184 nfs4_state_init(void)
3188 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3189 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3190 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3191 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3192 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3194 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3195 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3197 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3198 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3199 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3201 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3202 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3203 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3205 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3206 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3207 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3209 memset(&onestateid
, ~0, sizeof(stateid_t
));
3210 INIT_LIST_HEAD(&close_lru
);
3211 INIT_LIST_HEAD(&client_lru
);
3212 INIT_LIST_HEAD(&del_recall_lru
);
3213 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3214 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3215 reclaim_str_hashtbl_size
= 0;
3218 /* initialization to perform when the nfsd service is started: */
3221 __nfs4_state_start(void)
3225 boot_time
= get_seconds();
3226 grace_time
= max(user_lease_time
, lease_time
);
3227 lease_time
= user_lease_time
;
3229 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3230 laundry_wq
= create_singlethread_workqueue("nfsd4");
3231 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
*HZ
);
3235 nfs4_state_start(void)
3241 status
= nfsd4_init_slabs();
3244 __nfs4_state_start();
3256 nfs4_lease_time(void)
3262 __nfs4_state_shutdown(void)
3265 struct nfs4_client
*clp
= NULL
;
3266 struct nfs4_delegation
*dp
= NULL
;
3267 struct nfs4_stateowner
*sop
= NULL
;
3268 struct list_head
*pos
, *next
, reaplist
;
3270 list_for_each_safe(pos
, next
, &close_lru
) {
3271 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3272 list_del(&sop
->so_close_lru
);
3273 nfs4_put_stateowner(sop
);
3276 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3277 while (!list_empty(&conf_id_hashtbl
[i
])) {
3278 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3281 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3282 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3286 INIT_LIST_HEAD(&reaplist
);
3287 spin_lock(&recall_lock
);
3288 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3289 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3290 list_move(&dp
->dl_recall_lru
, &reaplist
);
3292 spin_unlock(&recall_lock
);
3293 list_for_each_safe(pos
, next
, &reaplist
) {
3294 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3295 list_del_init(&dp
->dl_recall_lru
);
3296 unhash_delegation(dp
);
3299 cancel_delayed_work(&laundromat_work
);
3300 flush_workqueue(laundry_wq
);
3301 destroy_workqueue(laundry_wq
);
3306 nfs4_state_shutdown(void)
3309 nfs4_release_reclaim();
3310 __nfs4_state_shutdown();
3312 nfs4_unlock_state();
3316 * Called when leasetime is changed.
3318 * The only way the protocol gives us to handle on-the-fly lease changes is to
3319 * simulate a reboot. Instead of doing that, we just wait till the next time
3320 * we start to register any changes in lease time. If the administrator
3321 * really wants to change the lease time *now*, they can go ahead and bring
3322 * nfsd down and then back up again after changing the lease time.
3325 nfs4_reset_lease(time_t leasetime
)
3328 user_lease_time
= leasetime
;