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_del_perfile
);
158 INIT_LIST_HEAD(&dp
->dl_del_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_del_perfile
, &fp
->fi_delegations
);
180 list_add(&dp
->dl_del_perclnt
, &clp
->cl_del_perclnt
);
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_del_perfile
);
218 list_del_init(&dp
->dl_del_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_del_perclnt
)) {
349 dp
= list_entry(clp
->cl_del_perclnt
.next
, struct nfs4_delegation
, dl_del_perclnt
);
350 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
352 list_del_init(&dp
->dl_del_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_perclient
)) {
365 sop
= list_entry(clp
->cl_perclient
.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_perclient
);
384 INIT_LIST_HEAD(&clp
->cl_del_perclnt
);
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
*clp
, *conf
= NULL
, *unconf
= NULL
;
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.
850 clp
= find_confirmed_client(clid
);
852 status
= nfserr_clid_inuse
;
853 if (clp
->cl_addr
!= ip_addr
) {
854 printk("NFSD: setclientid: string in use by client"
855 "(clientid %08x/%08x)\n",
856 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
861 clp
= find_unconfirmed_client(clid
);
863 status
= nfserr_clid_inuse
;
864 if (clp
->cl_addr
!= ip_addr
) {
865 printk("NFSD: setclientid: string in use by client"
866 "(clientid %08x/%08x)\n",
867 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
873 * unconf record that matches input clientid and input confirm.
874 * conf record that matches input clientid.
875 * conf and unconf records match names, verifiers
877 if ((conf
&& unconf
) &&
878 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
879 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
880 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
881 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
882 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
883 status
= nfserr_clid_inuse
;
885 /* XXX: We just turn off callbacks until we can handle
886 * change request correctly. */
888 clp
->cl_callback
.cb_parsed
= 0;
890 expire_client(unconf
);
896 * conf record that matches input clientid.
897 * if unconf record that matches input clientid, then unconf->cl_name
898 * or unconf->cl_verifier don't match the conf record.
900 else if ((conf
&& !unconf
) ||
902 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
903 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
904 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
)) {
905 status
= nfserr_clid_inuse
;
912 * conf record not found.
913 * unconf record found.
914 * unconf->cl_confirm matches input confirm
916 else if (!conf
&& unconf
&& cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
917 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
918 status
= nfserr_clid_inuse
;
921 clientstr_hashval(unconf
->cl_recdir
);
922 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
928 move_to_confirmed(unconf
);
933 * conf record not found, or if conf, then conf->cl_confirm does not
934 * match input confirm.
935 * unconf record not found, or if unconf, then unconf->cl_confirm
936 * does not match input confirm.
938 else if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
))) &&
939 (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
, &confirm
)))) {
940 status
= nfserr_stale_clientid
;
943 /* check that we have hit one of the cases...*/
944 status
= nfserr_clid_inuse
;
948 nfsd4_probe_callback(clp
);
954 * Open owner state (share locks)
957 /* hash tables for nfs4_stateowner */
958 #define OWNER_HASH_BITS 8
959 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
960 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
962 #define ownerid_hashval(id) \
963 ((id) & OWNER_HASH_MASK)
964 #define ownerstr_hashval(clientid, ownername) \
965 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
967 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
968 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
970 /* hash table for nfs4_file */
971 #define FILE_HASH_BITS 8
972 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
973 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
974 /* hash table for (open)nfs4_stateid */
975 #define STATEID_HASH_BITS 10
976 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
977 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
979 #define file_hashval(x) \
980 hash_ptr(x, FILE_HASH_BITS)
981 #define stateid_hashval(owner_id, file_id) \
982 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
984 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
985 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
987 /* OPEN Share state helper functions */
988 static inline struct nfs4_file
*
989 alloc_init_file(struct inode
*ino
)
991 struct nfs4_file
*fp
;
992 unsigned int hashval
= file_hashval(ino
);
994 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
996 kref_init(&fp
->fi_ref
);
997 INIT_LIST_HEAD(&fp
->fi_hash
);
998 INIT_LIST_HEAD(&fp
->fi_stateids
);
999 INIT_LIST_HEAD(&fp
->fi_delegations
);
1000 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
1001 fp
->fi_inode
= igrab(ino
);
1002 fp
->fi_id
= current_fileid
++;
1009 nfsd4_free_slab(kmem_cache_t
**slab
)
1015 status
= kmem_cache_destroy(*slab
);
1021 nfsd4_free_slabs(void)
1023 nfsd4_free_slab(&stateowner_slab
);
1024 nfsd4_free_slab(&file_slab
);
1025 nfsd4_free_slab(&stateid_slab
);
1026 nfsd4_free_slab(&deleg_slab
);
1030 nfsd4_init_slabs(void)
1032 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1033 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1034 if (stateowner_slab
== NULL
)
1036 file_slab
= kmem_cache_create("nfsd4_files",
1037 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1038 if (file_slab
== NULL
)
1040 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1041 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1042 if (stateid_slab
== NULL
)
1044 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1045 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1046 if (deleg_slab
== NULL
)
1051 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1056 nfs4_free_stateowner(struct kref
*kref
)
1058 struct nfs4_stateowner
*sop
=
1059 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1060 kfree(sop
->so_owner
.data
);
1061 kmem_cache_free(stateowner_slab
, sop
);
1064 static inline struct nfs4_stateowner
*
1065 alloc_stateowner(struct xdr_netobj
*owner
)
1067 struct nfs4_stateowner
*sop
;
1069 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1070 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1071 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1072 sop
->so_owner
.len
= owner
->len
;
1073 kref_init(&sop
->so_ref
);
1076 kmem_cache_free(stateowner_slab
, sop
);
1081 static struct nfs4_stateowner
*
1082 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1083 struct nfs4_stateowner
*sop
;
1084 struct nfs4_replay
*rp
;
1085 unsigned int idhashval
;
1087 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1089 idhashval
= ownerid_hashval(current_ownerid
);
1090 INIT_LIST_HEAD(&sop
->so_idhash
);
1091 INIT_LIST_HEAD(&sop
->so_strhash
);
1092 INIT_LIST_HEAD(&sop
->so_perclient
);
1093 INIT_LIST_HEAD(&sop
->so_perfilestate
);
1094 INIT_LIST_HEAD(&sop
->so_perlockowner
); /* not used */
1095 INIT_LIST_HEAD(&sop
->so_close_lru
);
1097 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1098 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1099 list_add(&sop
->so_perclient
, &clp
->cl_perclient
);
1100 sop
->so_is_open_owner
= 1;
1101 sop
->so_id
= current_ownerid
++;
1102 sop
->so_client
= clp
;
1103 sop
->so_seqid
= open
->op_seqid
;
1104 sop
->so_confirmed
= 0;
1105 rp
= &sop
->so_replay
;
1106 rp
->rp_status
= NFSERR_SERVERFAULT
;
1108 rp
->rp_buf
= rp
->rp_ibuf
;
1113 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1115 struct nfs4_stateowner
*lock_sop
;
1117 while (!list_empty(&open_stp
->st_perlockowner
)) {
1118 lock_sop
= list_entry(open_stp
->st_perlockowner
.next
,
1119 struct nfs4_stateowner
, so_perlockowner
);
1120 /* list_del(&open_stp->st_perlockowner); */
1121 BUG_ON(lock_sop
->so_is_open_owner
);
1122 release_stateowner(lock_sop
);
1127 unhash_stateowner(struct nfs4_stateowner
*sop
)
1129 struct nfs4_stateid
*stp
;
1131 list_del(&sop
->so_idhash
);
1132 list_del(&sop
->so_strhash
);
1133 if (sop
->so_is_open_owner
)
1134 list_del(&sop
->so_perclient
);
1135 list_del(&sop
->so_perlockowner
);
1136 while (!list_empty(&sop
->so_perfilestate
)) {
1137 stp
= list_entry(sop
->so_perfilestate
.next
,
1138 struct nfs4_stateid
, st_perfilestate
);
1139 if (sop
->so_is_open_owner
)
1140 release_stateid(stp
, OPEN_STATE
);
1142 release_stateid(stp
, LOCK_STATE
);
1147 release_stateowner(struct nfs4_stateowner
*sop
)
1149 unhash_stateowner(sop
);
1150 list_del(&sop
->so_close_lru
);
1151 nfs4_put_stateowner(sop
);
1155 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1156 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1157 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1159 INIT_LIST_HEAD(&stp
->st_hash
);
1160 INIT_LIST_HEAD(&stp
->st_perfilestate
);
1161 INIT_LIST_HEAD(&stp
->st_perlockowner
);
1162 INIT_LIST_HEAD(&stp
->st_perfile
);
1163 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1164 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
1165 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1166 stp
->st_stateowner
= sop
;
1169 stp
->st_stateid
.si_boot
= boot_time
;
1170 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1171 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1172 stp
->st_stateid
.si_generation
= 0;
1173 stp
->st_access_bmap
= 0;
1174 stp
->st_deny_bmap
= 0;
1175 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1176 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1180 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1182 struct file
*filp
= stp
->st_vfs_file
;
1184 list_del(&stp
->st_hash
);
1185 list_del(&stp
->st_perfile
);
1186 list_del(&stp
->st_perfilestate
);
1187 if (flags
& OPEN_STATE
) {
1188 release_stateid_lockowners(stp
);
1189 stp
->st_vfs_file
= NULL
;
1191 } else if (flags
& LOCK_STATE
)
1192 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1193 put_nfs4_file(stp
->st_file
);
1194 kmem_cache_free(stateid_slab
, stp
);
1199 move_to_close_lru(struct nfs4_stateowner
*sop
)
1201 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1203 unhash_stateowner(sop
);
1204 list_add_tail(&sop
->so_close_lru
, &close_lru
);
1205 sop
->so_time
= get_seconds();
1209 release_state_owner(struct nfs4_stateid
*stp
, int flag
)
1211 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1213 dprintk("NFSD: release_state_owner\n");
1214 release_stateid(stp
, flag
);
1216 /* place unused nfs4_stateowners on so_close_lru list to be
1217 * released by the laundromat service after the lease period
1218 * to enable us to handle CLOSE replay
1220 if (sop
->so_confirmed
&& list_empty(&sop
->so_perfilestate
))
1221 move_to_close_lru(sop
);
1225 cmp_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
, clientid_t
*clid
) {
1226 return ((sop
->so_owner
.len
== owner
->len
) &&
1227 !memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1228 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
));
1231 static struct nfs4_stateowner
*
1232 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1234 struct nfs4_stateowner
*so
= NULL
;
1236 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1237 if (cmp_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1243 /* search file_hashtbl[] for file */
1244 static struct nfs4_file
*
1245 find_file(struct inode
*ino
)
1247 unsigned int hashval
= file_hashval(ino
);
1248 struct nfs4_file
*fp
;
1250 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1251 if (fp
->fi_inode
== ino
) {
1259 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1260 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1263 set_access(unsigned int *access
, unsigned long bmap
) {
1267 for (i
= 1; i
< 4; i
++) {
1268 if (test_bit(i
, &bmap
))
1274 set_deny(unsigned int *deny
, unsigned long bmap
) {
1278 for (i
= 0; i
< 4; i
++) {
1279 if (test_bit(i
, &bmap
))
1285 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1286 unsigned int access
, deny
;
1288 set_access(&access
, stp
->st_access_bmap
);
1289 set_deny(&deny
, stp
->st_deny_bmap
);
1290 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1296 * Called to check deny when READ with all zero stateid or
1297 * WRITE with all zero or all one stateid
1300 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1302 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1303 struct nfs4_file
*fp
;
1304 struct nfs4_stateid
*stp
;
1307 dprintk("NFSD: nfs4_share_conflict\n");
1309 fp
= find_file(ino
);
1312 ret
= nfserr_share_denied
;
1313 /* Search for conflicting share reservations */
1314 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1315 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1316 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1326 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1328 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1329 put_write_access(filp
->f_dentry
->d_inode
);
1330 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1335 * Recall a delegation
1338 do_recall(void *__dp
)
1340 struct nfs4_delegation
*dp
= __dp
;
1342 daemonize("nfsv4-recall");
1344 nfsd4_cb_recall(dp
);
1349 * Spawn a thread to perform a recall on the delegation represented
1350 * by the lease (file_lock)
1352 * Called from break_lease() with lock_kernel() held.
1353 * Note: we assume break_lease will only call this *once* for any given
1357 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1359 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1360 struct task_struct
*t
;
1362 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1366 /* We're assuming the state code never drops its reference
1367 * without first removing the lease. Since we're in this lease
1368 * callback (and since the lease code is serialized by the kernel
1369 * lock) we know the server hasn't removed the lease yet, we know
1370 * it's safe to take a reference: */
1371 atomic_inc(&dp
->dl_count
);
1373 spin_lock(&recall_lock
);
1374 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1375 spin_unlock(&recall_lock
);
1377 /* only place dl_time is set. protected by lock_kernel*/
1378 dp
->dl_time
= get_seconds();
1380 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1381 fl
->fl_break_time
= jiffies
+ NFSD_LEASE_TIME
* HZ
;
1383 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1385 struct nfs4_client
*clp
= dp
->dl_client
;
1387 printk(KERN_INFO
"NFSD: Callback thread failed for "
1388 "for client (clientid %08x/%08x)\n",
1389 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1390 nfs4_put_delegation(dp
);
1395 * The file_lock is being reapd.
1397 * Called by locks_free_lock() with lock_kernel() held.
1400 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1402 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1404 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1406 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1408 dp
->dl_flock
= NULL
;
1412 * Set the delegation file_lock back pointer.
1414 * Called from __setlease() with lock_kernel() held.
1417 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1419 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1421 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1428 * Called from __setlease() with lock_kernel() held
1431 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1433 struct nfs4_delegation
*onlistd
=
1434 (struct nfs4_delegation
*)onlist
->fl_owner
;
1435 struct nfs4_delegation
*tryd
=
1436 (struct nfs4_delegation
*)try->fl_owner
;
1438 if (onlist
->fl_lmops
!= try->fl_lmops
)
1441 return onlistd
->dl_client
== tryd
->dl_client
;
1446 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1449 return lease_modify(onlist
, arg
);
1454 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1455 .fl_break
= nfsd_break_deleg_cb
,
1456 .fl_release_private
= nfsd_release_deleg_cb
,
1457 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1458 .fl_mylease
= nfsd_same_client_deleg_cb
,
1459 .fl_change
= nfsd_change_deleg_cb
,
1464 * nfsd4_process_open1()
1465 * lookup stateowner.
1477 * called with nfs4_lock_state() held.
1480 nfsd4_process_open1(struct nfsd4_open
*open
)
1483 clientid_t
*clientid
= &open
->op_clientid
;
1484 struct nfs4_client
*clp
= NULL
;
1485 unsigned int strhashval
;
1486 struct nfs4_stateowner
*sop
= NULL
;
1488 status
= nfserr_inval
;
1489 if (!check_name(open
->op_owner
))
1492 if (STALE_CLIENTID(&open
->op_clientid
))
1493 return nfserr_stale_clientid
;
1495 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1496 sop
= find_openstateowner_str(strhashval
, open
);
1498 open
->op_stateowner
= sop
;
1499 /* check for replay */
1500 if (open
->op_seqid
== sop
->so_seqid
){
1501 if (sop
->so_replay
.rp_buflen
)
1502 return NFSERR_REPLAY_ME
;
1504 /* The original OPEN failed so spectacularly
1505 * that we don't even have replay data saved!
1506 * Therefore, we have no choice but to continue
1507 * processing this OPEN; presumably, we'll
1508 * fail again for the same reason.
1510 dprintk("nfsd4_process_open1:"
1511 " replay with no replay cache\n");
1514 } else if (sop
->so_confirmed
) {
1515 if (open
->op_seqid
== sop
->so_seqid
+ 1)
1517 status
= nfserr_bad_seqid
;
1520 /* If we get here, we received an OPEN for an
1521 * unconfirmed nfs4_stateowner. Since the seqid's are
1522 * different, purge the existing nfs4_stateowner, and
1523 * instantiate a new one.
1525 clp
= sop
->so_client
;
1526 release_stateowner(sop
);
1529 /* nfs4_stateowner not found.
1530 * Verify clientid and instantiate new nfs4_stateowner.
1531 * If verify fails this is presumably the result of the
1532 * client's lease expiring.
1534 status
= nfserr_expired
;
1535 clp
= find_confirmed_client(clientid
);
1539 status
= nfserr_resource
;
1540 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1543 open
->op_stateowner
= sop
;
1546 renew_client(sop
->so_client
);
1548 if (status
&& open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1549 status
= nfserr_reclaim_bad
;
1554 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1556 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1557 return nfserr_openmode
;
1562 static struct nfs4_delegation
*
1563 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1565 struct nfs4_delegation
*dp
;
1567 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_del_perfile
) {
1568 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1575 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1576 struct nfs4_delegation
**dp
)
1579 int status
= nfserr_bad_stateid
;
1581 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1584 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1585 RD_STATE
: WR_STATE
;
1586 status
= nfs4_check_delegmode(*dp
, flags
);
1590 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1594 open
->op_stateowner
->so_confirmed
= 1;
1599 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1601 struct nfs4_stateid
*local
;
1602 int status
= nfserr_share_denied
;
1603 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1605 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1606 /* ignore lock owners */
1607 if (local
->st_stateowner
->so_is_open_owner
== 0)
1609 /* remember if we have seen this open owner */
1610 if (local
->st_stateowner
== sop
)
1612 /* check for conflicting share reservations */
1613 if (!test_share(local
, open
))
1621 static inline struct nfs4_stateid
*
1622 nfs4_alloc_stateid(void)
1624 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1628 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1629 struct nfs4_delegation
*dp
,
1630 struct svc_fh
*cur_fh
, int flags
)
1632 struct nfs4_stateid
*stp
;
1634 stp
= nfs4_alloc_stateid();
1636 return nfserr_resource
;
1639 get_file(dp
->dl_vfs_file
);
1640 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1643 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1646 if (status
== nfserr_dropit
)
1647 status
= nfserr_jukebox
;
1648 kmem_cache_free(stateid_slab
, stp
);
1657 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1658 struct nfsd4_open
*open
)
1660 struct iattr iattr
= {
1661 .ia_valid
= ATTR_SIZE
,
1664 if (!open
->op_truncate
)
1666 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1668 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1672 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1674 struct file
*filp
= stp
->st_vfs_file
;
1675 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1676 unsigned int share_access
;
1679 set_access(&share_access
, stp
->st_access_bmap
);
1680 share_access
= ~share_access
;
1681 share_access
&= open
->op_share_access
;
1683 if (!(share_access
& NFS4_SHARE_ACCESS_WRITE
))
1684 return nfsd4_truncate(rqstp
, cur_fh
, open
);
1686 status
= get_write_access(inode
);
1688 return nfserrno(status
);
1689 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1691 put_write_access(inode
);
1694 /* remember the open */
1695 filp
->f_mode
= (filp
->f_mode
| FMODE_WRITE
) & ~FMODE_READ
;
1696 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1697 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1703 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1705 nfs4_set_claim_prev(struct nfsd4_open
*open
, int *status
)
1707 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1709 *status
= nfserr_reclaim_bad
;
1711 open
->op_stateowner
->so_confirmed
= 1;
1712 open
->op_stateowner
->so_seqid
--;
1718 * Attempt to hand out a delegation.
1721 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1723 struct nfs4_delegation
*dp
;
1724 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1725 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1726 struct file_lock fl
, *flp
= &fl
;
1727 int status
, flag
= 0;
1729 flag
= NFS4_OPEN_DELEGATE_NONE
;
1730 open
->op_recall
= 0;
1731 switch (open
->op_claim_type
) {
1732 case NFS4_OPEN_CLAIM_PREVIOUS
:
1733 if (!atomic_read(&cb
->cb_set
))
1734 open
->op_recall
= 1;
1735 flag
= open
->op_delegate_type
;
1736 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1739 case NFS4_OPEN_CLAIM_NULL
:
1740 /* Let's not give out any delegations till everyone's
1741 * had the chance to reclaim theirs.... */
1742 if (nfs4_in_grace())
1744 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1746 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1747 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1749 flag
= NFS4_OPEN_DELEGATE_READ
;
1755 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1757 flag
= NFS4_OPEN_DELEGATE_NONE
;
1760 locks_init_lock(&fl
);
1761 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1762 fl
.fl_flags
= FL_LEASE
;
1763 fl
.fl_end
= OFFSET_MAX
;
1764 fl
.fl_owner
= (fl_owner_t
)dp
;
1765 fl
.fl_file
= stp
->st_vfs_file
;
1766 fl
.fl_pid
= current
->tgid
;
1768 /* setlease checks to see if delegation should be handed out.
1769 * the lock_manager callbacks fl_mylease and fl_change are used
1771 if ((status
= setlease(stp
->st_vfs_file
,
1772 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1773 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1774 unhash_delegation(dp
);
1775 flag
= NFS4_OPEN_DELEGATE_NONE
;
1779 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1781 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1782 dp
->dl_stateid
.si_boot
,
1783 dp
->dl_stateid
.si_stateownerid
,
1784 dp
->dl_stateid
.si_fileid
,
1785 dp
->dl_stateid
.si_generation
);
1787 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1788 && flag
== NFS4_OPEN_DELEGATE_NONE
1789 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1790 printk("NFSD: WARNING: refusing delegation reclaim\n");
1791 open
->op_delegate_type
= flag
;
1795 * called with nfs4_lock_state() held.
1798 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1800 struct nfs4_file
*fp
= NULL
;
1801 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1802 struct nfs4_stateid
*stp
= NULL
;
1803 struct nfs4_delegation
*dp
= NULL
;
1806 status
= nfserr_inval
;
1807 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1810 * Lookup file; if found, lookup stateid and check open request,
1811 * and check for delegations in the process of being recalled.
1812 * If not found, create the nfs4_file struct
1814 fp
= find_file(ino
);
1816 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1818 status
= nfs4_check_deleg(fp
, open
, &dp
);
1822 status
= nfserr_bad_stateid
;
1823 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1825 status
= nfserr_resource
;
1826 fp
= alloc_init_file(ino
);
1832 * OPEN the file, or upgrade an existing OPEN.
1833 * If truncate fails, the OPEN fails.
1836 /* Stateid was found, this is an OPEN upgrade */
1837 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1841 /* Stateid was not found, this is a new OPEN */
1843 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1847 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1850 init_stateid(stp
, fp
, open
);
1851 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1853 release_stateid(stp
, OPEN_STATE
);
1857 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1860 * Attempt to hand out a delegation. No error return, because the
1861 * OPEN succeeds even if we fail.
1863 nfs4_open_delegation(current_fh
, open
, stp
);
1867 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1868 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1869 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1873 /* CLAIM_PREVIOUS has different error returns */
1874 nfs4_set_claim_prev(open
, &status
);
1876 * To finish the open response, we just need to set the rflags.
1878 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1879 if (!open
->op_stateowner
->so_confirmed
)
1880 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1885 static struct workqueue_struct
*laundry_wq
;
1886 static struct work_struct laundromat_work
;
1887 static void laundromat_main(void *);
1888 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1891 nfsd4_renew(clientid_t
*clid
)
1893 struct nfs4_client
*clp
;
1897 dprintk("process_renew(%08x/%08x): starting\n",
1898 clid
->cl_boot
, clid
->cl_id
);
1899 status
= nfserr_stale_clientid
;
1900 if (STALE_CLIENTID(clid
))
1902 clp
= find_confirmed_client(clid
);
1903 status
= nfserr_expired
;
1905 /* We assume the client took too long to RENEW. */
1906 dprintk("nfsd4_renew: clientid not found!\n");
1910 status
= nfserr_cb_path_down
;
1911 if (!list_empty(&clp
->cl_del_perclnt
)
1912 && !atomic_read(&clp
->cl_callback
.cb_set
))
1916 nfs4_unlock_state();
1923 dprintk("NFSD: end of grace period\n");
1928 nfs4_laundromat(void)
1930 struct nfs4_client
*clp
;
1931 struct nfs4_stateowner
*sop
;
1932 struct nfs4_delegation
*dp
;
1933 struct list_head
*pos
, *next
, reaplist
;
1934 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1935 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1936 time_t u
, test_val
= NFSD_LEASE_TIME
;
1940 dprintk("NFSD: laundromat service - starting\n");
1943 list_for_each_safe(pos
, next
, &client_lru
) {
1944 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1945 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1946 t
= clp
->cl_time
- cutoff
;
1947 if (clientid_val
> t
)
1951 dprintk("NFSD: purging unused client (clientid %08x)\n",
1952 clp
->cl_clientid
.cl_id
);
1955 INIT_LIST_HEAD(&reaplist
);
1956 spin_lock(&recall_lock
);
1957 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1958 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1959 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1960 u
= dp
->dl_time
- cutoff
;
1965 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1967 list_move(&dp
->dl_recall_lru
, &reaplist
);
1969 spin_unlock(&recall_lock
);
1970 list_for_each_safe(pos
, next
, &reaplist
) {
1971 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1972 list_del_init(&dp
->dl_recall_lru
);
1973 unhash_delegation(dp
);
1975 test_val
= NFSD_LEASE_TIME
;
1976 list_for_each_safe(pos
, next
, &close_lru
) {
1977 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1978 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1979 u
= sop
->so_time
- cutoff
;
1984 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1986 list_del(&sop
->so_close_lru
);
1987 nfs4_put_stateowner(sop
);
1989 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1990 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1991 nfs4_unlock_state();
1992 return clientid_val
;
1996 laundromat_main(void *not_used
)
2000 t
= nfs4_laundromat();
2001 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2002 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2005 /* search ownerid_hashtbl[] and close_lru for stateid owner
2006 * (stateid->si_stateownerid)
2008 static struct nfs4_stateowner
*
2009 find_openstateowner_id(u32 st_id
, int flags
) {
2010 struct nfs4_stateowner
*local
= NULL
;
2012 dprintk("NFSD: find_openstateowner_id %d\n", st_id
);
2013 if (flags
& CLOSE_STATE
) {
2014 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
2015 if (local
->so_id
== st_id
)
2023 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2025 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
2029 STALE_STATEID(stateid_t
*stateid
)
2031 if (stateid
->si_boot
== boot_time
)
2033 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2034 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2035 stateid
->si_generation
);
2040 access_permit_read(unsigned long access_bmap
)
2042 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2043 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2044 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2048 access_permit_write(unsigned long access_bmap
)
2050 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2051 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2055 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2057 int status
= nfserr_openmode
;
2059 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2061 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2069 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2071 /* Trying to call delegreturn with a special stateid? Yuch: */
2072 if (!(flags
& (RD_STATE
| WR_STATE
)))
2073 return nfserr_bad_stateid
;
2074 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2076 else if (nfs4_in_grace()) {
2077 /* Answer in remaining cases depends on existance of
2078 * conflicting state; so we must wait out the grace period. */
2079 return nfserr_grace
;
2080 } else if (flags
& WR_STATE
)
2081 return nfs4_share_conflict(current_fh
,
2082 NFS4_SHARE_DENY_WRITE
);
2083 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2084 return nfs4_share_conflict(current_fh
,
2085 NFS4_SHARE_DENY_READ
);
2089 * Allow READ/WRITE during grace period on recovered state only for files
2090 * that are not able to provide mandatory locking.
2093 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2095 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2096 && MANDATORY_LOCK(inode
);
2100 * Checks for stateid operations
2103 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2105 struct nfs4_stateid
*stp
= NULL
;
2106 struct nfs4_delegation
*dp
= NULL
;
2108 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2111 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2112 stateid
->si_boot
, stateid
->si_stateownerid
,
2113 stateid
->si_fileid
, stateid
->si_generation
);
2117 if (io_during_grace_disallowed(ino
, flags
))
2118 return nfserr_grace
;
2120 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2121 return check_special_stateids(current_fh
, stateid
, flags
);
2124 status
= nfserr_stale_stateid
;
2125 if (STALE_STATEID(stateid
))
2129 status
= nfserr_bad_stateid
;
2130 if (!stateid
->si_fileid
) { /* delegation stateid */
2131 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2132 dprintk("NFSD: delegation stateid not found\n");
2133 if (nfs4_in_grace())
2134 status
= nfserr_grace
;
2137 stidp
= &dp
->dl_stateid
;
2138 } else { /* open or lock stateid */
2139 if (!(stp
= find_stateid(stateid
, flags
))) {
2140 dprintk("NFSD: open or lock stateid not found\n");
2141 if (nfs4_in_grace())
2142 status
= nfserr_grace
;
2145 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2147 if (!stp
->st_stateowner
->so_confirmed
)
2149 stidp
= &stp
->st_stateid
;
2151 if (stateid
->si_generation
> stidp
->si_generation
)
2155 status
= nfserr_old_stateid
;
2156 if (stateid
->si_generation
< stidp
->si_generation
)
2159 if ((status
= nfs4_check_openmode(stp
,flags
)))
2161 renew_client(stp
->st_stateowner
->so_client
);
2163 *filpp
= stp
->st_vfs_file
;
2165 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2167 renew_client(dp
->dl_client
);
2168 if (flags
& DELEG_RET
)
2169 unhash_delegation(dp
);
2171 *filpp
= dp
->dl_vfs_file
;
2180 * Checks for sequence id mutating operations.
2183 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
)
2186 struct nfs4_stateid
*stp
;
2187 struct nfs4_stateowner
*sop
;
2189 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2190 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2191 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2192 stateid
->si_generation
);
2197 status
= nfserr_bad_stateid
;
2198 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2199 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2203 status
= nfserr_stale_stateid
;
2204 if (STALE_STATEID(stateid
))
2207 * We return BAD_STATEID if filehandle doesn't match stateid,
2208 * the confirmed flag is incorrecly set, or the generation
2209 * number is incorrect.
2210 * If there is no entry in the openfile table for this id,
2211 * we can't always return BAD_STATEID;
2212 * this might be a retransmitted CLOSE which has arrived after
2213 * the openfile has been released.
2215 if (!(stp
= find_stateid(stateid
, flags
)))
2216 goto no_nfs4_stateid
;
2218 status
= nfserr_bad_stateid
;
2220 /* for new lock stateowners:
2221 * check that the lock->v.new.open_stateid
2222 * refers to an open stateowner
2224 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2225 * as the open_stateid->st_stateowner->so_client->clientid
2228 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2229 struct nfs4_client
*clp
= sop
->so_client
;
2231 if (!sop
->so_is_open_owner
)
2233 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2237 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2238 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2243 *sopp
= sop
= stp
->st_stateowner
;
2246 * We now validate the seqid and stateid generation numbers.
2247 * For the moment, we ignore the possibility of
2248 * generation number wraparound.
2250 if (seqid
!= sop
->so_seqid
+ 1)
2253 if (sop
->so_confirmed
) {
2254 if (flags
& CONFIRM
) {
2255 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2260 if (!(flags
& CONFIRM
)) {
2261 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2265 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2266 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2270 status
= nfserr_old_stateid
;
2271 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2272 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2275 /* XXX renew the client lease here */
2284 * We determine whether this is a bad stateid or a replay,
2285 * starting by trying to look up the stateowner.
2286 * If stateowner is not found - stateid is bad.
2288 if (!(sop
= find_openstateowner_id(stateid
->si_stateownerid
, flags
))) {
2289 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2290 status
= nfserr_bad_stateid
;
2296 if (seqid
== sop
->so_seqid
) {
2297 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2298 /* indicate replay to calling function */
2299 status
= NFSERR_REPLAY_ME
;
2301 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop
->so_seqid
+1, seqid
);
2304 status
= nfserr_bad_seqid
;
2310 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
)
2313 struct nfs4_stateowner
*sop
;
2314 struct nfs4_stateid
*stp
;
2316 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2317 (int)current_fh
->fh_dentry
->d_name
.len
,
2318 current_fh
->fh_dentry
->d_name
.name
);
2320 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2325 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2326 &oc
->oc_req_stateid
,
2327 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2328 &oc
->oc_stateowner
, &stp
, NULL
)))
2331 sop
= oc
->oc_stateowner
;
2332 sop
->so_confirmed
= 1;
2333 update_stateid(&stp
->st_stateid
);
2334 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2335 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2336 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2337 stp
->st_stateid
.si_boot
,
2338 stp
->st_stateid
.si_stateownerid
,
2339 stp
->st_stateid
.si_fileid
,
2340 stp
->st_stateid
.si_generation
);
2342 if (oc
->oc_stateowner
)
2343 nfs4_get_stateowner(oc
->oc_stateowner
);
2344 nfs4_unlock_state();
2350 * unset all bits in union bitmap (bmap) that
2351 * do not exist in share (from successful OPEN_DOWNGRADE)
2354 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2357 for (i
= 1; i
< 4; i
++) {
2358 if ((i
& access
) != i
)
2359 __clear_bit(i
, bmap
);
2364 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2367 for (i
= 0; i
< 4; i
++) {
2368 if ((i
& deny
) != i
)
2369 __clear_bit(i
, bmap
);
2374 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
)
2377 struct nfs4_stateid
*stp
;
2378 unsigned int share_access
;
2380 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2381 (int)current_fh
->fh_dentry
->d_name
.len
,
2382 current_fh
->fh_dentry
->d_name
.name
);
2384 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2385 return nfserr_inval
;
2388 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2390 CHECK_FH
| OPEN_STATE
,
2391 &od
->od_stateowner
, &stp
, NULL
)))
2394 status
= nfserr_inval
;
2395 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2396 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2397 stp
->st_access_bmap
, od
->od_share_access
);
2400 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2401 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2402 stp
->st_deny_bmap
, od
->od_share_deny
);
2405 set_access(&share_access
, stp
->st_access_bmap
);
2406 nfs4_file_downgrade(stp
->st_vfs_file
,
2407 share_access
& ~od
->od_share_access
);
2409 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2410 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2412 update_stateid(&stp
->st_stateid
);
2413 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2416 if (od
->od_stateowner
)
2417 nfs4_get_stateowner(od
->od_stateowner
);
2418 nfs4_unlock_state();
2423 * nfs4_unlock_state() called after encode
2426 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
)
2429 struct nfs4_stateid
*stp
;
2431 dprintk("NFSD: nfsd4_close on file %.*s\n",
2432 (int)current_fh
->fh_dentry
->d_name
.len
,
2433 current_fh
->fh_dentry
->d_name
.name
);
2436 /* check close_lru for replay */
2437 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2439 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2440 &close
->cl_stateowner
, &stp
, NULL
)))
2443 * Return success, but first update the stateid.
2446 update_stateid(&stp
->st_stateid
);
2447 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2449 /* release_state_owner() calls nfsd_close() if needed */
2450 release_state_owner(stp
, OPEN_STATE
);
2452 if (close
->cl_stateowner
)
2453 nfs4_get_stateowner(close
->cl_stateowner
);
2454 nfs4_unlock_state();
2459 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2463 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2467 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2468 nfs4_unlock_state();
2475 * Lock owner state (byte-range locks)
2477 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2478 #define LOCK_HASH_BITS 8
2479 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2480 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2482 #define lockownerid_hashval(id) \
2483 ((id) & LOCK_HASH_MASK)
2485 static inline unsigned int
2486 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2487 struct xdr_netobj
*ownername
)
2489 return (file_hashval(inode
) + cl_id
2490 + opaque_hashval(ownername
->data
, ownername
->len
))
2494 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2495 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2496 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2498 static struct nfs4_stateid
*
2499 find_stateid(stateid_t
*stid
, int flags
)
2501 struct nfs4_stateid
*local
= NULL
;
2502 u32 st_id
= stid
->si_stateownerid
;
2503 u32 f_id
= stid
->si_fileid
;
2504 unsigned int hashval
;
2506 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2507 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2508 hashval
= stateid_hashval(st_id
, f_id
);
2509 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2510 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2511 (local
->st_stateid
.si_fileid
== f_id
))
2515 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2516 hashval
= stateid_hashval(st_id
, f_id
);
2517 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2518 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2519 (local
->st_stateid
.si_fileid
== f_id
))
2523 printk("NFSD: find_stateid: ERROR: no state flag\n");
2527 static struct nfs4_delegation
*
2528 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2530 struct nfs4_file
*fp
;
2531 struct nfs4_delegation
*dl
;
2533 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2534 stid
->si_boot
, stid
->si_stateownerid
,
2535 stid
->si_fileid
, stid
->si_generation
);
2537 fp
= find_file(ino
);
2540 dl
= find_delegation_file(fp
, stid
);
2546 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2547 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2548 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2549 * locking, this prevents us from being completely protocol-compliant. The
2550 * real solution to this problem is to start using unsigned file offsets in
2551 * the VFS, but this is a very deep change!
2554 nfs4_transform_lock_offset(struct file_lock
*lock
)
2556 if (lock
->fl_start
< 0)
2557 lock
->fl_start
= OFFSET_MAX
;
2558 if (lock
->fl_end
< 0)
2559 lock
->fl_end
= OFFSET_MAX
;
2563 nfs4_verify_lock_stateowner(struct nfs4_stateowner
*sop
, unsigned int hashval
)
2565 struct nfs4_stateowner
*local
= NULL
;
2568 if (hashval
>= LOCK_HASH_SIZE
)
2570 list_for_each_entry(local
, &lock_ownerid_hashtbl
[hashval
], so_idhash
) {
2582 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2584 struct nfs4_stateowner
*sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2585 unsigned int hval
= lockownerid_hashval(sop
->so_id
);
2587 deny
->ld_sop
= NULL
;
2588 if (nfs4_verify_lock_stateowner(sop
, hval
)) {
2589 kref_get(&sop
->so_ref
);
2591 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2593 deny
->ld_start
= fl
->fl_start
;
2594 deny
->ld_length
= ~(u64
)0;
2595 if (fl
->fl_end
!= ~(u64
)0)
2596 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2597 deny
->ld_type
= NFS4_READ_LT
;
2598 if (fl
->fl_type
!= F_RDLCK
)
2599 deny
->ld_type
= NFS4_WRITE_LT
;
2602 static struct nfs4_stateowner
*
2603 find_lockstateowner(struct xdr_netobj
*owner
, clientid_t
*clid
)
2605 struct nfs4_stateowner
*local
= NULL
;
2608 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2609 list_for_each_entry(local
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2610 if (!cmp_owner_str(local
, owner
, clid
))
2618 static struct nfs4_stateowner
*
2619 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2620 struct xdr_netobj
*owner
)
2622 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2623 struct nfs4_stateowner
*op
;
2625 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2626 if (cmp_owner_str(op
, owner
, clid
))
2633 * Alloc a lock owner structure.
2634 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2637 * strhashval = lock_ownerstr_hashval
2638 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2641 static struct nfs4_stateowner
*
2642 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2643 struct nfs4_stateowner
*sop
;
2644 struct nfs4_replay
*rp
;
2645 unsigned int idhashval
;
2647 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2649 idhashval
= lockownerid_hashval(current_ownerid
);
2650 INIT_LIST_HEAD(&sop
->so_idhash
);
2651 INIT_LIST_HEAD(&sop
->so_strhash
);
2652 INIT_LIST_HEAD(&sop
->so_perclient
);
2653 INIT_LIST_HEAD(&sop
->so_perfilestate
);
2654 INIT_LIST_HEAD(&sop
->so_perlockowner
);
2655 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2657 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2658 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2659 list_add(&sop
->so_perlockowner
, &open_stp
->st_perlockowner
);
2660 sop
->so_is_open_owner
= 0;
2661 sop
->so_id
= current_ownerid
++;
2662 sop
->so_client
= clp
;
2663 sop
->so_seqid
= lock
->lk_new_lock_seqid
- 1;
2664 sop
->so_confirmed
= 1;
2665 rp
= &sop
->so_replay
;
2666 rp
->rp_status
= NFSERR_SERVERFAULT
;
2668 rp
->rp_buf
= rp
->rp_ibuf
;
2672 static struct nfs4_stateid
*
2673 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2675 struct nfs4_stateid
*stp
;
2676 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2678 stp
= nfs4_alloc_stateid();
2681 INIT_LIST_HEAD(&stp
->st_hash
);
2682 INIT_LIST_HEAD(&stp
->st_perfile
);
2683 INIT_LIST_HEAD(&stp
->st_perfilestate
);
2684 INIT_LIST_HEAD(&stp
->st_perlockowner
); /* not used */
2685 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2686 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2687 list_add(&stp
->st_perfilestate
, &sop
->so_perfilestate
);
2688 stp
->st_stateowner
= sop
;
2691 stp
->st_stateid
.si_boot
= boot_time
;
2692 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2693 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2694 stp
->st_stateid
.si_generation
= 0;
2695 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2696 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2697 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2704 check_lock_length(u64 offset
, u64 length
)
2706 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2707 LOFF_OVERFLOW(offset
, length
)));
2714 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
)
2716 struct nfs4_stateowner
*lock_sop
= NULL
, *open_sop
= NULL
;
2717 struct nfs4_stateid
*lock_stp
;
2719 struct file_lock file_lock
;
2720 struct file_lock
*conflock
;
2722 unsigned int strhashval
;
2724 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2725 (long long) lock
->lk_offset
,
2726 (long long) lock
->lk_length
);
2728 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2729 return nfserr_grace
;
2730 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2731 return nfserr_no_grace
;
2733 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2734 return nfserr_inval
;
2738 if (lock
->lk_is_new
) {
2740 * Client indicates that this is a new lockowner.
2741 * Use open owner and open stateid to create lock owner and lock
2744 struct nfs4_stateid
*open_stp
= NULL
;
2745 struct nfs4_file
*fp
;
2747 status
= nfserr_stale_clientid
;
2748 if (STALE_CLIENTID(&lock
->lk_new_clientid
)) {
2749 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2753 /* is the new lock seqid presented by the client zero? */
2754 status
= nfserr_bad_seqid
;
2755 if (lock
->v
.new.lock_seqid
!= 0)
2758 /* validate and update open stateid and open seqid */
2759 status
= nfs4_preprocess_seqid_op(current_fh
,
2760 lock
->lk_new_open_seqid
,
2761 &lock
->lk_new_open_stateid
,
2762 CHECK_FH
| OPEN_STATE
,
2763 &open_sop
, &open_stp
,
2764 &lock
->v
.new.clientid
);
2766 if (lock
->lk_reclaim
)
2767 status
= nfserr_reclaim_bad
;
2770 /* create lockowner and lock stateid */
2771 fp
= open_stp
->st_file
;
2772 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2773 open_sop
->so_client
->cl_clientid
.cl_id
,
2774 &lock
->v
.new.owner
);
2776 * If we already have this lock owner, the client is in
2777 * error (or our bookeeping is wrong!)
2778 * for asking for a 'new lock'.
2780 status
= nfserr_bad_stateid
;
2781 lock_sop
= find_lockstateowner(&lock
->v
.new.owner
,
2782 &lock
->v
.new.clientid
);
2785 status
= nfserr_resource
;
2786 if (!(lock
->lk_stateowner
= alloc_init_lock_stateowner(strhashval
, open_sop
->so_client
, open_stp
, lock
)))
2788 if ((lock_stp
= alloc_init_lock_stateid(lock
->lk_stateowner
,
2789 fp
, open_stp
)) == NULL
) {
2790 release_stateowner(lock
->lk_stateowner
);
2791 lock
->lk_stateowner
= NULL
;
2794 /* bump the open seqid used to create the lock */
2795 open_sop
->so_seqid
++;
2797 /* lock (lock owner + lock stateid) already exists */
2798 status
= nfs4_preprocess_seqid_op(current_fh
,
2799 lock
->lk_old_lock_seqid
,
2800 &lock
->lk_old_lock_stateid
,
2801 CHECK_FH
| LOCK_STATE
,
2802 &lock
->lk_stateowner
, &lock_stp
, NULL
);
2806 /* lock->lk_stateowner and lock_stp have been created or found */
2807 filp
= lock_stp
->st_vfs_file
;
2809 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2810 printk("NFSD: nfsd4_lock: permission denied!\n");
2814 locks_init_lock(&file_lock
);
2815 switch (lock
->lk_type
) {
2818 file_lock
.fl_type
= F_RDLCK
;
2821 case NFS4_WRITEW_LT
:
2822 file_lock
.fl_type
= F_WRLCK
;
2825 status
= nfserr_inval
;
2828 file_lock
.fl_owner
= (fl_owner_t
) lock
->lk_stateowner
;
2829 file_lock
.fl_pid
= current
->tgid
;
2830 file_lock
.fl_file
= filp
;
2831 file_lock
.fl_flags
= FL_POSIX
;
2833 file_lock
.fl_start
= lock
->lk_offset
;
2834 if ((lock
->lk_length
== ~(u64
)0) ||
2835 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2836 file_lock
.fl_end
= ~(u64
)0;
2838 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2839 nfs4_transform_lock_offset(&file_lock
);
2842 * Try to lock the file in the VFS.
2843 * Note: locks.c uses the BKL to protect the inode's lock list.
2846 status
= posix_lock_file(filp
, &file_lock
);
2847 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2848 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2849 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status
);
2851 case 0: /* success! */
2852 update_stateid(&lock_stp
->st_stateid
);
2853 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2857 goto conflicting_lock
;
2859 status
= nfserr_deadlock
;
2861 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status
);
2862 goto out_destroy_new_stateid
;
2866 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2867 status
= nfserr_denied
;
2868 /* XXX There is a race here. Future patch needed to provide
2869 * an atomic posix_lock_and_test_file
2871 if (!(conflock
= posix_test_lock(filp
, &file_lock
))) {
2872 status
= nfserr_serverfault
;
2875 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
2877 out_destroy_new_stateid
:
2878 if (lock
->lk_is_new
) {
2879 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2881 * An error encountered after instantiation of the new
2882 * stateid has forced us to destroy it.
2884 if (!seqid_mutating_err(status
))
2885 open_sop
->so_seqid
--;
2887 release_state_owner(lock_stp
, LOCK_STATE
);
2890 if (lock
->lk_stateowner
)
2891 nfs4_get_stateowner(lock
->lk_stateowner
);
2892 nfs4_unlock_state();
2900 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2902 struct inode
*inode
;
2904 struct file_lock file_lock
;
2905 struct file_lock
*conflicting_lock
;
2908 if (nfs4_in_grace())
2909 return nfserr_grace
;
2911 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2912 return nfserr_inval
;
2914 lockt
->lt_stateowner
= NULL
;
2917 status
= nfserr_stale_clientid
;
2918 if (STALE_CLIENTID(&lockt
->lt_clientid
)) {
2919 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2923 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2924 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2925 if (status
== nfserr_symlink
)
2926 status
= nfserr_inval
;
2930 inode
= current_fh
->fh_dentry
->d_inode
;
2931 locks_init_lock(&file_lock
);
2932 switch (lockt
->lt_type
) {
2935 file_lock
.fl_type
= F_RDLCK
;
2938 case NFS4_WRITEW_LT
:
2939 file_lock
.fl_type
= F_WRLCK
;
2942 printk("NFSD: nfs4_lockt: bad lock type!\n");
2943 status
= nfserr_inval
;
2947 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2948 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2949 if (lockt
->lt_stateowner
)
2950 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2951 file_lock
.fl_pid
= current
->tgid
;
2952 file_lock
.fl_flags
= FL_POSIX
;
2954 file_lock
.fl_start
= lockt
->lt_offset
;
2955 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2956 file_lock
.fl_end
= ~(u64
)0;
2958 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2960 nfs4_transform_lock_offset(&file_lock
);
2962 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2963 * since LOCKT doesn't require an OPEN, and therefore a struct
2964 * file may not exist, pass posix_test_lock a struct file with
2965 * only the dentry:inode set.
2967 memset(&file
, 0, sizeof (struct file
));
2968 file
.f_dentry
= current_fh
->fh_dentry
;
2971 conflicting_lock
= posix_test_lock(&file
, &file_lock
);
2972 if (conflicting_lock
) {
2973 status
= nfserr_denied
;
2974 nfs4_set_lock_denied(conflicting_lock
, &lockt
->lt_denied
);
2977 nfs4_unlock_state();
2982 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
)
2984 struct nfs4_stateid
*stp
;
2985 struct file
*filp
= NULL
;
2986 struct file_lock file_lock
;
2989 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2990 (long long) locku
->lu_offset
,
2991 (long long) locku
->lu_length
);
2993 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2994 return nfserr_inval
;
2998 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
3001 CHECK_FH
| LOCK_STATE
,
3002 &locku
->lu_stateowner
, &stp
, NULL
)))
3005 filp
= stp
->st_vfs_file
;
3007 locks_init_lock(&file_lock
);
3008 file_lock
.fl_type
= F_UNLCK
;
3009 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
3010 file_lock
.fl_pid
= current
->tgid
;
3011 file_lock
.fl_file
= filp
;
3012 file_lock
.fl_flags
= FL_POSIX
;
3013 file_lock
.fl_start
= locku
->lu_offset
;
3015 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
3016 file_lock
.fl_end
= ~(u64
)0;
3018 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
3019 nfs4_transform_lock_offset(&file_lock
);
3022 * Try to unlock the file in the VFS.
3024 status
= posix_lock_file(filp
, &file_lock
);
3025 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
3026 file_lock
.fl_ops
->fl_release_private(&file_lock
);
3028 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
3032 * OK, unlock succeeded; the only thing left to do is update the stateid.
3034 update_stateid(&stp
->st_stateid
);
3035 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3038 if (locku
->lu_stateowner
)
3039 nfs4_get_stateowner(locku
->lu_stateowner
);
3040 nfs4_unlock_state();
3044 status
= nfserrno(status
);
3050 * 1: locks held by lockowner
3051 * 0: no locks held by lockowner
3054 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3056 struct file_lock
**flpp
;
3057 struct inode
*inode
= filp
->f_dentry
->d_inode
;
3061 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3062 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
)
3072 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
3074 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3075 struct nfs4_stateowner
*local
= NULL
;
3076 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3079 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3080 clid
->cl_boot
, clid
->cl_id
);
3082 /* XXX check for lease expiration */
3084 status
= nfserr_stale_clientid
;
3085 if (STALE_CLIENTID(clid
)) {
3086 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3093 local
= find_lockstateowner(owner
, clid
);
3095 struct nfs4_stateid
*stp
;
3097 /* check for any locks held by any stateid
3098 * associated with the (lock) stateowner */
3099 status
= nfserr_locks_held
;
3100 list_for_each_entry(stp
, &local
->so_perfilestate
,
3102 if (check_for_locks(stp
->st_vfs_file
, local
))
3105 /* no locks held by (lock) stateowner */
3107 release_stateowner(local
);
3110 nfs4_unlock_state();
3114 static inline struct nfs4_client_reclaim
*
3117 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3121 * failure => all reset bets are off, nfserr_no_grace...
3124 nfs4_client_to_reclaim(char *name
)
3126 unsigned int strhashval
;
3127 struct nfs4_client_reclaim
*crp
= NULL
;
3129 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3130 crp
= alloc_reclaim();
3133 strhashval
= clientstr_hashval(name
);
3134 INIT_LIST_HEAD(&crp
->cr_strhash
);
3135 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3136 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3137 reclaim_str_hashtbl_size
++;
3142 nfs4_release_reclaim(void)
3144 struct nfs4_client_reclaim
*crp
= NULL
;
3147 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3148 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3149 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3150 struct nfs4_client_reclaim
, cr_strhash
);
3151 list_del(&crp
->cr_strhash
);
3153 reclaim_str_hashtbl_size
--;
3156 BUG_ON(reclaim_str_hashtbl_size
);
3160 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3161 static struct nfs4_client_reclaim
*
3162 nfs4_find_reclaim_client(clientid_t
*clid
)
3164 unsigned int strhashval
;
3165 struct nfs4_client
*clp
;
3166 struct nfs4_client_reclaim
*crp
= NULL
;
3169 /* find clientid in conf_id_hashtbl */
3170 clp
= find_confirmed_client(clid
);
3174 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3175 clp
->cl_name
.len
, clp
->cl_name
.data
,
3178 /* find clp->cl_name in reclaim_str_hashtbl */
3179 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3180 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3181 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3189 * Called from OPEN. Look for clientid in reclaim list.
3192 nfs4_check_open_reclaim(clientid_t
*clid
)
3194 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3197 /* initialization to perform at module load time: */
3200 nfs4_state_init(void)
3204 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3205 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3206 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3207 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3208 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3210 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3211 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3213 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3214 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3215 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3217 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3218 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3219 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3221 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3222 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3223 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3225 memset(&onestateid
, ~0, sizeof(stateid_t
));
3226 INIT_LIST_HEAD(&close_lru
);
3227 INIT_LIST_HEAD(&client_lru
);
3228 INIT_LIST_HEAD(&del_recall_lru
);
3229 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3230 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3231 reclaim_str_hashtbl_size
= 0;
3234 /* initialization to perform when the nfsd service is started: */
3237 __nfs4_state_start(void)
3241 boot_time
= get_seconds();
3242 grace_time
= max(user_lease_time
, lease_time
);
3243 lease_time
= user_lease_time
;
3245 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3246 laundry_wq
= create_singlethread_workqueue("nfsd4");
3247 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
*HZ
);
3251 nfs4_state_start(void)
3257 status
= nfsd4_init_slabs();
3260 __nfs4_state_start();
3272 nfs4_lease_time(void)
3278 __nfs4_state_shutdown(void)
3281 struct nfs4_client
*clp
= NULL
;
3282 struct nfs4_delegation
*dp
= NULL
;
3283 struct nfs4_stateowner
*sop
= NULL
;
3284 struct list_head
*pos
, *next
, reaplist
;
3286 list_for_each_safe(pos
, next
, &close_lru
) {
3287 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3288 list_del(&sop
->so_close_lru
);
3289 nfs4_put_stateowner(sop
);
3292 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3293 while (!list_empty(&conf_id_hashtbl
[i
])) {
3294 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3297 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3298 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3302 INIT_LIST_HEAD(&reaplist
);
3303 spin_lock(&recall_lock
);
3304 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3305 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3306 list_move(&dp
->dl_recall_lru
, &reaplist
);
3308 spin_unlock(&recall_lock
);
3309 list_for_each_safe(pos
, next
, &reaplist
) {
3310 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3311 list_del_init(&dp
->dl_recall_lru
);
3312 unhash_delegation(dp
);
3315 cancel_delayed_work(&laundromat_work
);
3316 flush_workqueue(laundry_wq
);
3317 destroy_workqueue(laundry_wq
);
3322 nfs4_state_shutdown(void)
3325 nfs4_release_reclaim();
3326 __nfs4_state_shutdown();
3328 nfs4_unlock_state();
3332 * Called when leasetime is changed.
3334 * The only way the protocol gives us to handle on-the-fly lease changes is to
3335 * simulate a reboot. Instead of doing that, we just wait till the next time
3336 * we start to register any changes in lease time. If the administrator
3337 * really wants to change the lease time *now*, they can go ahead and bring
3338 * nfsd down and then back up again after changing the lease time.
3341 nfs4_reset_lease(time_t leasetime
)
3344 user_lease_time
= leasetime
;