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 INIT_LIST_HEAD(&clp
->cl_idhash
);
381 INIT_LIST_HEAD(&clp
->cl_strhash
);
382 INIT_LIST_HEAD(&clp
->cl_openowners
);
383 INIT_LIST_HEAD(&clp
->cl_delegations
);
384 INIT_LIST_HEAD(&clp
->cl_lru
);
390 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
391 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
395 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
396 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
397 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
401 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
403 target
->cr_uid
= source
->cr_uid
;
404 target
->cr_gid
= source
->cr_gid
;
405 target
->cr_group_info
= source
->cr_group_info
;
406 get_group_info(target
->cr_group_info
);
410 same_name(const char *n1
, const char *n2
) {
411 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
415 cmp_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
) {
416 return(!memcmp(v1
->data
,v2
->data
,sizeof(v1
->data
)));
420 cmp_clid(clientid_t
* cl1
, clientid_t
* cl2
) {
421 return((cl1
->cl_boot
== cl2
->cl_boot
) &&
422 (cl1
->cl_id
== cl2
->cl_id
));
425 /* XXX what about NGROUP */
427 cmp_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
){
428 return(cr1
->cr_uid
== cr2
->cr_uid
);
433 gen_clid(struct nfs4_client
*clp
) {
434 clp
->cl_clientid
.cl_boot
= boot_time
;
435 clp
->cl_clientid
.cl_id
= current_clientid
++;
439 gen_confirm(struct nfs4_client
*clp
) {
444 p
= (u32
*)clp
->cl_confirm
.data
;
450 check_name(struct xdr_netobj name
) {
454 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
455 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
462 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
464 unsigned int idhashval
;
466 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
467 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
468 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
469 list_add_tail(&clp
->cl_lru
, &client_lru
);
470 clp
->cl_time
= get_seconds();
474 move_to_confirmed(struct nfs4_client
*clp
)
476 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
477 unsigned int strhashval
;
479 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
480 list_del_init(&clp
->cl_strhash
);
481 list_del_init(&clp
->cl_idhash
);
482 list_add(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
483 strhashval
= clientstr_hashval(clp
->cl_recdir
);
484 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
488 static struct nfs4_client
*
489 find_confirmed_client(clientid_t
*clid
)
491 struct nfs4_client
*clp
;
492 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
494 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
495 if (cmp_clid(&clp
->cl_clientid
, clid
))
501 static struct nfs4_client
*
502 find_unconfirmed_client(clientid_t
*clid
)
504 struct nfs4_client
*clp
;
505 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
507 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
508 if (cmp_clid(&clp
->cl_clientid
, clid
))
514 static struct nfs4_client
*
515 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
517 struct nfs4_client
*clp
;
519 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
520 if (same_name(clp
->cl_recdir
, dname
))
526 static struct nfs4_client
*
527 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
529 struct nfs4_client
*clp
;
531 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
532 if (same_name(clp
->cl_recdir
, dname
))
538 /* a helper function for parse_callback */
540 parse_octet(unsigned int *lenp
, char **addrp
)
542 unsigned int len
= *lenp
;
554 if ((c
< '0') || (c
> '9')) {
560 n
= (n
* 10) + (c
- '0');
571 /* parse and set the setclientid ipv4 callback address */
573 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
578 u32 addrlen
= addr_len
;
579 char *addr
= addr_val
;
584 for(i
= 4; i
> 0 ; i
--) {
585 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
588 cbaddr
|= (temp
<< shift
);
596 for(i
= 2; i
> 0 ; i
--) {
597 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
600 cbport
|= (temp
<< shift
);
609 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
611 struct nfs4_callback
*cb
= &clp
->cl_callback
;
613 /* Currently, we only support tcp for the callback channel */
614 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
617 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
618 &cb
->cb_addr
, &cb
->cb_port
)))
620 cb
->cb_prog
= se
->se_callback_prog
;
621 cb
->cb_ident
= se
->se_callback_ident
;
624 printk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
625 "will not receive delegations\n",
626 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
632 * RFC 3010 has a complex implmentation description of processing a
633 * SETCLIENTID request consisting of 5 bullets, labeled as
634 * CASE0 - CASE4 below.
637 * callback information will be processed in a future patch
639 * an unconfirmed record is added when:
640 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
641 * CASE 1: confirmed record found with matching name, principal,
642 * verifier, and clientid.
643 * CASE 2: confirmed record found with matching name, principal,
644 * and there is no unconfirmed record with matching
647 * an unconfirmed record is replaced when:
648 * CASE 3: confirmed record found with matching name, principal,
649 * and an unconfirmed record is found with matching
650 * name, principal, and with clientid and
651 * confirm that does not match the confirmed record.
652 * CASE 4: there is no confirmed record with matching name and
653 * principal. there is an unconfirmed record with
654 * matching name, principal.
656 * an unconfirmed record is deleted when:
657 * CASE 1: an unconfirmed record that matches input name, verifier,
658 * and confirmed clientid.
659 * CASE 4: any unconfirmed records with matching name and principal
660 * that exist after an unconfirmed record has been replaced
661 * as described above.
665 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_setclientid
*setclid
)
667 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
668 struct xdr_netobj clname
= {
669 .len
= setclid
->se_namelen
,
670 .data
= setclid
->se_name
,
672 nfs4_verifier clverifier
= setclid
->se_verf
;
673 unsigned int strhashval
;
674 struct nfs4_client
*conf
, *unconf
, *new;
676 char dname
[HEXDIR_LEN
];
678 status
= nfserr_inval
;
679 if (!check_name(clname
))
682 status
= nfs4_make_rec_clidname(dname
, &clname
);
687 * XXX The Duplicate Request Cache (DRC) has been checked (??)
688 * We get here on a DRC miss.
691 strhashval
= clientstr_hashval(dname
);
694 conf
= find_confirmed_client_by_str(dname
, strhashval
);
698 * clname match, confirmed, different principal
699 * or different ip_address
701 status
= nfserr_clid_inuse
;
702 if (!cmp_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
703 || conf
->cl_addr
!= ip_addr
) {
704 printk("NFSD: setclientid: string in use by client"
705 "(clientid %08x/%08x)\n",
706 conf
->cl_clientid
.cl_boot
, conf
->cl_clientid
.cl_id
);
710 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
711 status
= nfserr_resource
;
715 * placed first, because it is the normal case.
718 expire_client(unconf
);
719 new = create_client(clname
, dname
);
722 copy_verf(new, &clverifier
);
723 new->cl_addr
= ip_addr
;
724 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
727 gen_callback(new, setclid
);
728 add_to_unconfirmed(new, strhashval
);
729 } else if (cmp_verf(&conf
->cl_verifier
, &clverifier
)) {
732 * cl_name match, confirmed, principal match
733 * verifier match: probable callback update
735 * remove any unconfirmed nfs4_client with
736 * matching cl_name, cl_verifier, and cl_clientid
738 * create and insert an unconfirmed nfs4_client with same
739 * cl_name, cl_verifier, and cl_clientid as existing
740 * nfs4_client, but with the new callback info and a
744 /* Note this is removing unconfirmed {*x***},
745 * which is stronger than RFC recommended {vxc**}.
746 * This has the advantage that there is at most
747 * one {*x***} in either list at any time.
749 expire_client(unconf
);
751 new = create_client(clname
, dname
);
754 copy_verf(new,&conf
->cl_verifier
);
755 new->cl_addr
= ip_addr
;
756 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
757 copy_clid(new, conf
);
759 gen_callback(new, setclid
);
760 add_to_unconfirmed(new,strhashval
);
761 } else if (!unconf
) {
764 * clname match, confirmed, principal match
765 * verfier does not match
766 * no unconfirmed. create a new unconfirmed nfs4_client
767 * using input clverifier, clname, and callback info
768 * and generate a new cl_clientid and cl_confirm.
770 new = create_client(clname
, dname
);
773 copy_verf(new,&clverifier
);
774 new->cl_addr
= ip_addr
;
775 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
778 gen_callback(new, setclid
);
779 add_to_unconfirmed(new, strhashval
);
780 } else if (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
783 * confirmed found (name, principal match)
784 * confirmed verifier does not match input clverifier
786 * unconfirmed found (name match)
787 * confirmed->cl_confirm != unconfirmed->cl_confirm
789 * remove unconfirmed.
791 * create an unconfirmed nfs4_client
792 * with same cl_name as existing confirmed nfs4_client,
793 * but with new callback info, new cl_clientid,
794 * new cl_verifier and a new cl_confirm
796 expire_client(unconf
);
797 new = create_client(clname
, dname
);
800 copy_verf(new,&clverifier
);
801 new->cl_addr
= ip_addr
;
802 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
805 gen_callback(new, setclid
);
806 add_to_unconfirmed(new, strhashval
);
808 /* No cases hit !!! */
809 status
= nfserr_inval
;
813 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
814 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
815 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
824 * RFC 3010 has a complex implmentation description of processing a
825 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
826 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
828 * NOTE: callback information will be processed here in a future patch
831 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
, struct nfsd4_setclientid_confirm
*setclientid_confirm
)
833 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
834 struct nfs4_client
*conf
, *unconf
;
835 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
836 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
839 if (STALE_CLIENTID(clid
))
840 return nfserr_stale_clientid
;
842 * XXX The Duplicate Request Cache (DRC) has been checked (??)
843 * We get here on a DRC miss.
848 conf
= find_confirmed_client(clid
);
849 unconf
= find_unconfirmed_client(clid
);
851 status
= nfserr_clid_inuse
;
852 if (conf
&& conf
->cl_addr
!= ip_addr
)
854 if (unconf
&& unconf
->cl_addr
!= ip_addr
)
857 if ((conf
&& unconf
) &&
858 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
859 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
860 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
861 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
863 * unconf record that matches input clientid and input confirm.
864 * conf record that matches input clientid.
865 * conf and unconf records match names, verifiers
867 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
868 status
= nfserr_clid_inuse
;
870 /* XXX: We just turn off callbacks until we can handle
871 * change request correctly. */
872 atomic_set(&conf
->cl_callback
.cb_set
, 0);
874 expire_client(unconf
);
878 } else if ((conf
&& !unconf
) ||
880 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
881 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
883 * conf record that matches input clientid.
884 * if unconf record matches input clientid, then
885 * unconf->cl_name or unconf->cl_verifier don't match the
888 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
))
889 status
= nfserr_clid_inuse
;
892 } else if (!conf
&& unconf
893 && cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
895 * conf record not found.
896 * unconf record found.
897 * unconf->cl_confirm matches input confirm
899 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
900 status
= nfserr_clid_inuse
;
903 clientstr_hashval(unconf
->cl_recdir
);
904 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
909 move_to_confirmed(unconf
);
913 } else if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
)))
914 && (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
,
917 * conf record not found, or if conf, conf->cl_confirm does not
918 * match input confirm.
919 * unconf record not found, or if unconf, unconf->cl_confirm
920 * does not match input confirm.
922 status
= nfserr_stale_clientid
;
924 /* check that we have hit one of the cases...*/
925 status
= nfserr_clid_inuse
;
929 nfsd4_probe_callback(conf
);
935 * Open owner state (share locks)
938 /* hash tables for nfs4_stateowner */
939 #define OWNER_HASH_BITS 8
940 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
941 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
943 #define ownerid_hashval(id) \
944 ((id) & OWNER_HASH_MASK)
945 #define ownerstr_hashval(clientid, ownername) \
946 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
948 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
949 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
951 /* hash table for nfs4_file */
952 #define FILE_HASH_BITS 8
953 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
954 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
955 /* hash table for (open)nfs4_stateid */
956 #define STATEID_HASH_BITS 10
957 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
958 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
960 #define file_hashval(x) \
961 hash_ptr(x, FILE_HASH_BITS)
962 #define stateid_hashval(owner_id, file_id) \
963 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
965 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
966 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
968 /* OPEN Share state helper functions */
969 static inline struct nfs4_file
*
970 alloc_init_file(struct inode
*ino
)
972 struct nfs4_file
*fp
;
973 unsigned int hashval
= file_hashval(ino
);
975 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
977 kref_init(&fp
->fi_ref
);
978 INIT_LIST_HEAD(&fp
->fi_hash
);
979 INIT_LIST_HEAD(&fp
->fi_stateids
);
980 INIT_LIST_HEAD(&fp
->fi_delegations
);
981 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
982 fp
->fi_inode
= igrab(ino
);
983 fp
->fi_id
= current_fileid
++;
990 nfsd4_free_slab(kmem_cache_t
**slab
)
996 status
= kmem_cache_destroy(*slab
);
1002 nfsd4_free_slabs(void)
1004 nfsd4_free_slab(&stateowner_slab
);
1005 nfsd4_free_slab(&file_slab
);
1006 nfsd4_free_slab(&stateid_slab
);
1007 nfsd4_free_slab(&deleg_slab
);
1011 nfsd4_init_slabs(void)
1013 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1014 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1015 if (stateowner_slab
== NULL
)
1017 file_slab
= kmem_cache_create("nfsd4_files",
1018 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1019 if (file_slab
== NULL
)
1021 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1022 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1023 if (stateid_slab
== NULL
)
1025 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1026 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1027 if (deleg_slab
== NULL
)
1032 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1037 nfs4_free_stateowner(struct kref
*kref
)
1039 struct nfs4_stateowner
*sop
=
1040 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1041 kfree(sop
->so_owner
.data
);
1042 kmem_cache_free(stateowner_slab
, sop
);
1045 static inline struct nfs4_stateowner
*
1046 alloc_stateowner(struct xdr_netobj
*owner
)
1048 struct nfs4_stateowner
*sop
;
1050 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1051 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1052 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1053 sop
->so_owner
.len
= owner
->len
;
1054 kref_init(&sop
->so_ref
);
1057 kmem_cache_free(stateowner_slab
, sop
);
1062 static struct nfs4_stateowner
*
1063 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1064 struct nfs4_stateowner
*sop
;
1065 struct nfs4_replay
*rp
;
1066 unsigned int idhashval
;
1068 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1070 idhashval
= ownerid_hashval(current_ownerid
);
1071 INIT_LIST_HEAD(&sop
->so_idhash
);
1072 INIT_LIST_HEAD(&sop
->so_strhash
);
1073 INIT_LIST_HEAD(&sop
->so_perclient
);
1074 INIT_LIST_HEAD(&sop
->so_stateids
);
1075 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1076 INIT_LIST_HEAD(&sop
->so_close_lru
);
1078 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1079 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1080 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1081 sop
->so_is_open_owner
= 1;
1082 sop
->so_id
= current_ownerid
++;
1083 sop
->so_client
= clp
;
1084 sop
->so_seqid
= open
->op_seqid
;
1085 sop
->so_confirmed
= 0;
1086 rp
= &sop
->so_replay
;
1087 rp
->rp_status
= NFSERR_SERVERFAULT
;
1089 rp
->rp_buf
= rp
->rp_ibuf
;
1094 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1096 struct nfs4_stateowner
*lock_sop
;
1098 while (!list_empty(&open_stp
->st_lockowners
)) {
1099 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1100 struct nfs4_stateowner
, so_perstateid
);
1101 /* list_del(&open_stp->st_lockowners); */
1102 BUG_ON(lock_sop
->so_is_open_owner
);
1103 release_stateowner(lock_sop
);
1108 unhash_stateowner(struct nfs4_stateowner
*sop
)
1110 struct nfs4_stateid
*stp
;
1112 list_del(&sop
->so_idhash
);
1113 list_del(&sop
->so_strhash
);
1114 if (sop
->so_is_open_owner
)
1115 list_del(&sop
->so_perclient
);
1116 list_del(&sop
->so_perstateid
);
1117 while (!list_empty(&sop
->so_stateids
)) {
1118 stp
= list_entry(sop
->so_stateids
.next
,
1119 struct nfs4_stateid
, st_perstateowner
);
1120 if (sop
->so_is_open_owner
)
1121 release_stateid(stp
, OPEN_STATE
);
1123 release_stateid(stp
, LOCK_STATE
);
1128 release_stateowner(struct nfs4_stateowner
*sop
)
1130 unhash_stateowner(sop
);
1131 list_del(&sop
->so_close_lru
);
1132 nfs4_put_stateowner(sop
);
1136 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1137 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1138 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1140 INIT_LIST_HEAD(&stp
->st_hash
);
1141 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1142 INIT_LIST_HEAD(&stp
->st_lockowners
);
1143 INIT_LIST_HEAD(&stp
->st_perfile
);
1144 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1145 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1146 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1147 stp
->st_stateowner
= sop
;
1150 stp
->st_stateid
.si_boot
= boot_time
;
1151 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1152 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1153 stp
->st_stateid
.si_generation
= 0;
1154 stp
->st_access_bmap
= 0;
1155 stp
->st_deny_bmap
= 0;
1156 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1157 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1161 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1163 struct file
*filp
= stp
->st_vfs_file
;
1165 list_del(&stp
->st_hash
);
1166 list_del(&stp
->st_perfile
);
1167 list_del(&stp
->st_perstateowner
);
1168 if (flags
& OPEN_STATE
) {
1169 release_stateid_lockowners(stp
);
1170 stp
->st_vfs_file
= NULL
;
1172 } else if (flags
& LOCK_STATE
)
1173 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1174 put_nfs4_file(stp
->st_file
);
1175 kmem_cache_free(stateid_slab
, stp
);
1180 move_to_close_lru(struct nfs4_stateowner
*sop
)
1182 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1184 unhash_stateowner(sop
);
1185 list_add_tail(&sop
->so_close_lru
, &close_lru
);
1186 sop
->so_time
= get_seconds();
1190 release_state_owner(struct nfs4_stateid
*stp
, int flag
)
1192 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1194 dprintk("NFSD: release_state_owner\n");
1195 release_stateid(stp
, flag
);
1197 /* place unused nfs4_stateowners on so_close_lru list to be
1198 * released by the laundromat service after the lease period
1199 * to enable us to handle CLOSE replay
1201 if (sop
->so_confirmed
&& list_empty(&sop
->so_stateids
))
1202 move_to_close_lru(sop
);
1206 cmp_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
, clientid_t
*clid
) {
1207 return ((sop
->so_owner
.len
== owner
->len
) &&
1208 !memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1209 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
));
1212 static struct nfs4_stateowner
*
1213 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1215 struct nfs4_stateowner
*so
= NULL
;
1217 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1218 if (cmp_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1224 /* search file_hashtbl[] for file */
1225 static struct nfs4_file
*
1226 find_file(struct inode
*ino
)
1228 unsigned int hashval
= file_hashval(ino
);
1229 struct nfs4_file
*fp
;
1231 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1232 if (fp
->fi_inode
== ino
) {
1240 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1241 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1244 set_access(unsigned int *access
, unsigned long bmap
) {
1248 for (i
= 1; i
< 4; i
++) {
1249 if (test_bit(i
, &bmap
))
1255 set_deny(unsigned int *deny
, unsigned long bmap
) {
1259 for (i
= 0; i
< 4; i
++) {
1260 if (test_bit(i
, &bmap
))
1266 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1267 unsigned int access
, deny
;
1269 set_access(&access
, stp
->st_access_bmap
);
1270 set_deny(&deny
, stp
->st_deny_bmap
);
1271 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1277 * Called to check deny when READ with all zero stateid or
1278 * WRITE with all zero or all one stateid
1281 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1283 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1284 struct nfs4_file
*fp
;
1285 struct nfs4_stateid
*stp
;
1288 dprintk("NFSD: nfs4_share_conflict\n");
1290 fp
= find_file(ino
);
1293 ret
= nfserr_share_denied
;
1294 /* Search for conflicting share reservations */
1295 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1296 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1297 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1307 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1309 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1310 put_write_access(filp
->f_dentry
->d_inode
);
1311 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1316 * Recall a delegation
1319 do_recall(void *__dp
)
1321 struct nfs4_delegation
*dp
= __dp
;
1323 daemonize("nfsv4-recall");
1325 nfsd4_cb_recall(dp
);
1330 * Spawn a thread to perform a recall on the delegation represented
1331 * by the lease (file_lock)
1333 * Called from break_lease() with lock_kernel() held.
1334 * Note: we assume break_lease will only call this *once* for any given
1338 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1340 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1341 struct task_struct
*t
;
1343 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1347 /* We're assuming the state code never drops its reference
1348 * without first removing the lease. Since we're in this lease
1349 * callback (and since the lease code is serialized by the kernel
1350 * lock) we know the server hasn't removed the lease yet, we know
1351 * it's safe to take a reference: */
1352 atomic_inc(&dp
->dl_count
);
1354 spin_lock(&recall_lock
);
1355 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1356 spin_unlock(&recall_lock
);
1358 /* only place dl_time is set. protected by lock_kernel*/
1359 dp
->dl_time
= get_seconds();
1361 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1362 fl
->fl_break_time
= jiffies
+ NFSD_LEASE_TIME
* HZ
;
1364 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1366 struct nfs4_client
*clp
= dp
->dl_client
;
1368 printk(KERN_INFO
"NFSD: Callback thread failed for "
1369 "for client (clientid %08x/%08x)\n",
1370 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1371 nfs4_put_delegation(dp
);
1376 * The file_lock is being reapd.
1378 * Called by locks_free_lock() with lock_kernel() held.
1381 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1383 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1385 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1387 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1389 dp
->dl_flock
= NULL
;
1393 * Set the delegation file_lock back pointer.
1395 * Called from __setlease() with lock_kernel() held.
1398 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1400 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1402 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1409 * Called from __setlease() with lock_kernel() held
1412 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1414 struct nfs4_delegation
*onlistd
=
1415 (struct nfs4_delegation
*)onlist
->fl_owner
;
1416 struct nfs4_delegation
*tryd
=
1417 (struct nfs4_delegation
*)try->fl_owner
;
1419 if (onlist
->fl_lmops
!= try->fl_lmops
)
1422 return onlistd
->dl_client
== tryd
->dl_client
;
1427 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1430 return lease_modify(onlist
, arg
);
1435 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1436 .fl_break
= nfsd_break_deleg_cb
,
1437 .fl_release_private
= nfsd_release_deleg_cb
,
1438 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1439 .fl_mylease
= nfsd_same_client_deleg_cb
,
1440 .fl_change
= nfsd_change_deleg_cb
,
1445 * nfsd4_process_open1()
1446 * lookup stateowner.
1458 * called with nfs4_lock_state() held.
1461 nfsd4_process_open1(struct nfsd4_open
*open
)
1464 clientid_t
*clientid
= &open
->op_clientid
;
1465 struct nfs4_client
*clp
= NULL
;
1466 unsigned int strhashval
;
1467 struct nfs4_stateowner
*sop
= NULL
;
1469 status
= nfserr_inval
;
1470 if (!check_name(open
->op_owner
))
1473 if (STALE_CLIENTID(&open
->op_clientid
))
1474 return nfserr_stale_clientid
;
1476 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1477 sop
= find_openstateowner_str(strhashval
, open
);
1479 open
->op_stateowner
= sop
;
1480 /* check for replay */
1481 if (open
->op_seqid
== sop
->so_seqid
){
1482 if (sop
->so_replay
.rp_buflen
)
1483 return NFSERR_REPLAY_ME
;
1485 /* The original OPEN failed so spectacularly
1486 * that we don't even have replay data saved!
1487 * Therefore, we have no choice but to continue
1488 * processing this OPEN; presumably, we'll
1489 * fail again for the same reason.
1491 dprintk("nfsd4_process_open1:"
1492 " replay with no replay cache\n");
1495 } else if (sop
->so_confirmed
) {
1496 if (open
->op_seqid
== sop
->so_seqid
+ 1)
1498 status
= nfserr_bad_seqid
;
1501 /* If we get here, we received an OPEN for an
1502 * unconfirmed nfs4_stateowner. Since the seqid's are
1503 * different, purge the existing nfs4_stateowner, and
1504 * instantiate a new one.
1506 clp
= sop
->so_client
;
1507 release_stateowner(sop
);
1510 /* nfs4_stateowner not found.
1511 * Verify clientid and instantiate new nfs4_stateowner.
1512 * If verify fails this is presumably the result of the
1513 * client's lease expiring.
1515 status
= nfserr_expired
;
1516 clp
= find_confirmed_client(clientid
);
1520 status
= nfserr_resource
;
1521 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1524 open
->op_stateowner
= sop
;
1527 renew_client(sop
->so_client
);
1529 if (status
&& open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1530 status
= nfserr_reclaim_bad
;
1535 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1537 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1538 return nfserr_openmode
;
1543 static struct nfs4_delegation
*
1544 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1546 struct nfs4_delegation
*dp
;
1548 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1549 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1556 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1557 struct nfs4_delegation
**dp
)
1560 int status
= nfserr_bad_stateid
;
1562 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1565 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1566 RD_STATE
: WR_STATE
;
1567 status
= nfs4_check_delegmode(*dp
, flags
);
1571 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1575 open
->op_stateowner
->so_confirmed
= 1;
1580 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1582 struct nfs4_stateid
*local
;
1583 int status
= nfserr_share_denied
;
1584 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1586 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1587 /* ignore lock owners */
1588 if (local
->st_stateowner
->so_is_open_owner
== 0)
1590 /* remember if we have seen this open owner */
1591 if (local
->st_stateowner
== sop
)
1593 /* check for conflicting share reservations */
1594 if (!test_share(local
, open
))
1602 static inline struct nfs4_stateid
*
1603 nfs4_alloc_stateid(void)
1605 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1609 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1610 struct nfs4_delegation
*dp
,
1611 struct svc_fh
*cur_fh
, int flags
)
1613 struct nfs4_stateid
*stp
;
1615 stp
= nfs4_alloc_stateid();
1617 return nfserr_resource
;
1620 get_file(dp
->dl_vfs_file
);
1621 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1624 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1627 if (status
== nfserr_dropit
)
1628 status
= nfserr_jukebox
;
1629 kmem_cache_free(stateid_slab
, stp
);
1638 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1639 struct nfsd4_open
*open
)
1641 struct iattr iattr
= {
1642 .ia_valid
= ATTR_SIZE
,
1645 if (!open
->op_truncate
)
1647 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1649 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1653 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1655 struct file
*filp
= stp
->st_vfs_file
;
1656 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1657 unsigned int share_access
;
1660 set_access(&share_access
, stp
->st_access_bmap
);
1661 share_access
= ~share_access
;
1662 share_access
&= open
->op_share_access
;
1664 if (!(share_access
& NFS4_SHARE_ACCESS_WRITE
))
1665 return nfsd4_truncate(rqstp
, cur_fh
, open
);
1667 status
= get_write_access(inode
);
1669 return nfserrno(status
);
1670 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1672 put_write_access(inode
);
1675 /* remember the open */
1676 filp
->f_mode
= (filp
->f_mode
| FMODE_WRITE
) & ~FMODE_READ
;
1677 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1678 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1684 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1686 nfs4_set_claim_prev(struct nfsd4_open
*open
, int *status
)
1688 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1690 *status
= nfserr_reclaim_bad
;
1692 open
->op_stateowner
->so_confirmed
= 1;
1693 open
->op_stateowner
->so_seqid
--;
1699 * Attempt to hand out a delegation.
1702 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1704 struct nfs4_delegation
*dp
;
1705 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1706 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1707 struct file_lock fl
, *flp
= &fl
;
1708 int status
, flag
= 0;
1710 flag
= NFS4_OPEN_DELEGATE_NONE
;
1711 open
->op_recall
= 0;
1712 switch (open
->op_claim_type
) {
1713 case NFS4_OPEN_CLAIM_PREVIOUS
:
1714 if (!atomic_read(&cb
->cb_set
))
1715 open
->op_recall
= 1;
1716 flag
= open
->op_delegate_type
;
1717 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1720 case NFS4_OPEN_CLAIM_NULL
:
1721 /* Let's not give out any delegations till everyone's
1722 * had the chance to reclaim theirs.... */
1723 if (nfs4_in_grace())
1725 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1727 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1728 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1730 flag
= NFS4_OPEN_DELEGATE_READ
;
1736 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1738 flag
= NFS4_OPEN_DELEGATE_NONE
;
1741 locks_init_lock(&fl
);
1742 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1743 fl
.fl_flags
= FL_LEASE
;
1744 fl
.fl_end
= OFFSET_MAX
;
1745 fl
.fl_owner
= (fl_owner_t
)dp
;
1746 fl
.fl_file
= stp
->st_vfs_file
;
1747 fl
.fl_pid
= current
->tgid
;
1749 /* setlease checks to see if delegation should be handed out.
1750 * the lock_manager callbacks fl_mylease and fl_change are used
1752 if ((status
= setlease(stp
->st_vfs_file
,
1753 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1754 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1755 unhash_delegation(dp
);
1756 flag
= NFS4_OPEN_DELEGATE_NONE
;
1760 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1762 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1763 dp
->dl_stateid
.si_boot
,
1764 dp
->dl_stateid
.si_stateownerid
,
1765 dp
->dl_stateid
.si_fileid
,
1766 dp
->dl_stateid
.si_generation
);
1768 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1769 && flag
== NFS4_OPEN_DELEGATE_NONE
1770 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1771 printk("NFSD: WARNING: refusing delegation reclaim\n");
1772 open
->op_delegate_type
= flag
;
1776 * called with nfs4_lock_state() held.
1779 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1781 struct nfs4_file
*fp
= NULL
;
1782 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1783 struct nfs4_stateid
*stp
= NULL
;
1784 struct nfs4_delegation
*dp
= NULL
;
1787 status
= nfserr_inval
;
1788 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1791 * Lookup file; if found, lookup stateid and check open request,
1792 * and check for delegations in the process of being recalled.
1793 * If not found, create the nfs4_file struct
1795 fp
= find_file(ino
);
1797 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1799 status
= nfs4_check_deleg(fp
, open
, &dp
);
1803 status
= nfserr_bad_stateid
;
1804 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1806 status
= nfserr_resource
;
1807 fp
= alloc_init_file(ino
);
1813 * OPEN the file, or upgrade an existing OPEN.
1814 * If truncate fails, the OPEN fails.
1817 /* Stateid was found, this is an OPEN upgrade */
1818 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1822 /* Stateid was not found, this is a new OPEN */
1824 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1828 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1831 init_stateid(stp
, fp
, open
);
1832 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1834 release_stateid(stp
, OPEN_STATE
);
1838 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1841 * Attempt to hand out a delegation. No error return, because the
1842 * OPEN succeeds even if we fail.
1844 nfs4_open_delegation(current_fh
, open
, stp
);
1848 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1849 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1850 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1854 /* CLAIM_PREVIOUS has different error returns */
1855 nfs4_set_claim_prev(open
, &status
);
1857 * To finish the open response, we just need to set the rflags.
1859 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1860 if (!open
->op_stateowner
->so_confirmed
)
1861 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1866 static struct workqueue_struct
*laundry_wq
;
1867 static struct work_struct laundromat_work
;
1868 static void laundromat_main(void *);
1869 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1872 nfsd4_renew(clientid_t
*clid
)
1874 struct nfs4_client
*clp
;
1878 dprintk("process_renew(%08x/%08x): starting\n",
1879 clid
->cl_boot
, clid
->cl_id
);
1880 status
= nfserr_stale_clientid
;
1881 if (STALE_CLIENTID(clid
))
1883 clp
= find_confirmed_client(clid
);
1884 status
= nfserr_expired
;
1886 /* We assume the client took too long to RENEW. */
1887 dprintk("nfsd4_renew: clientid not found!\n");
1891 status
= nfserr_cb_path_down
;
1892 if (!list_empty(&clp
->cl_delegations
)
1893 && !atomic_read(&clp
->cl_callback
.cb_set
))
1897 nfs4_unlock_state();
1904 dprintk("NFSD: end of grace period\n");
1909 nfs4_laundromat(void)
1911 struct nfs4_client
*clp
;
1912 struct nfs4_stateowner
*sop
;
1913 struct nfs4_delegation
*dp
;
1914 struct list_head
*pos
, *next
, reaplist
;
1915 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1916 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1917 time_t u
, test_val
= NFSD_LEASE_TIME
;
1921 dprintk("NFSD: laundromat service - starting\n");
1924 list_for_each_safe(pos
, next
, &client_lru
) {
1925 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1926 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1927 t
= clp
->cl_time
- cutoff
;
1928 if (clientid_val
> t
)
1932 dprintk("NFSD: purging unused client (clientid %08x)\n",
1933 clp
->cl_clientid
.cl_id
);
1936 INIT_LIST_HEAD(&reaplist
);
1937 spin_lock(&recall_lock
);
1938 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1939 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1940 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1941 u
= dp
->dl_time
- cutoff
;
1946 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1948 list_move(&dp
->dl_recall_lru
, &reaplist
);
1950 spin_unlock(&recall_lock
);
1951 list_for_each_safe(pos
, next
, &reaplist
) {
1952 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1953 list_del_init(&dp
->dl_recall_lru
);
1954 unhash_delegation(dp
);
1956 test_val
= NFSD_LEASE_TIME
;
1957 list_for_each_safe(pos
, next
, &close_lru
) {
1958 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1959 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1960 u
= sop
->so_time
- cutoff
;
1965 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1967 list_del(&sop
->so_close_lru
);
1968 nfs4_put_stateowner(sop
);
1970 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1971 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1972 nfs4_unlock_state();
1973 return clientid_val
;
1977 laundromat_main(void *not_used
)
1981 t
= nfs4_laundromat();
1982 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1983 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1986 /* search ownerid_hashtbl[] and close_lru for stateid owner
1987 * (stateid->si_stateownerid)
1989 static struct nfs4_stateowner
*
1990 find_openstateowner_id(u32 st_id
, int flags
) {
1991 struct nfs4_stateowner
*local
= NULL
;
1993 dprintk("NFSD: find_openstateowner_id %d\n", st_id
);
1994 if (flags
& CLOSE_STATE
) {
1995 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1996 if (local
->so_id
== st_id
)
2004 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2006 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
2010 STALE_STATEID(stateid_t
*stateid
)
2012 if (stateid
->si_boot
== boot_time
)
2014 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2015 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2016 stateid
->si_generation
);
2021 access_permit_read(unsigned long access_bmap
)
2023 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2024 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2025 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2029 access_permit_write(unsigned long access_bmap
)
2031 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2032 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2036 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2038 int status
= nfserr_openmode
;
2040 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2042 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2050 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2052 /* Trying to call delegreturn with a special stateid? Yuch: */
2053 if (!(flags
& (RD_STATE
| WR_STATE
)))
2054 return nfserr_bad_stateid
;
2055 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2057 else if (nfs4_in_grace()) {
2058 /* Answer in remaining cases depends on existance of
2059 * conflicting state; so we must wait out the grace period. */
2060 return nfserr_grace
;
2061 } else if (flags
& WR_STATE
)
2062 return nfs4_share_conflict(current_fh
,
2063 NFS4_SHARE_DENY_WRITE
);
2064 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2065 return nfs4_share_conflict(current_fh
,
2066 NFS4_SHARE_DENY_READ
);
2070 * Allow READ/WRITE during grace period on recovered state only for files
2071 * that are not able to provide mandatory locking.
2074 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2076 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2077 && MANDATORY_LOCK(inode
);
2081 * Checks for stateid operations
2084 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2086 struct nfs4_stateid
*stp
= NULL
;
2087 struct nfs4_delegation
*dp
= NULL
;
2089 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2092 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2093 stateid
->si_boot
, stateid
->si_stateownerid
,
2094 stateid
->si_fileid
, stateid
->si_generation
);
2098 if (io_during_grace_disallowed(ino
, flags
))
2099 return nfserr_grace
;
2101 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2102 return check_special_stateids(current_fh
, stateid
, flags
);
2105 status
= nfserr_stale_stateid
;
2106 if (STALE_STATEID(stateid
))
2110 status
= nfserr_bad_stateid
;
2111 if (!stateid
->si_fileid
) { /* delegation stateid */
2112 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2113 dprintk("NFSD: delegation stateid not found\n");
2114 if (nfs4_in_grace())
2115 status
= nfserr_grace
;
2118 stidp
= &dp
->dl_stateid
;
2119 } else { /* open or lock stateid */
2120 if (!(stp
= find_stateid(stateid
, flags
))) {
2121 dprintk("NFSD: open or lock stateid not found\n");
2122 if (nfs4_in_grace())
2123 status
= nfserr_grace
;
2126 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2128 if (!stp
->st_stateowner
->so_confirmed
)
2130 stidp
= &stp
->st_stateid
;
2132 if (stateid
->si_generation
> stidp
->si_generation
)
2136 status
= nfserr_old_stateid
;
2137 if (stateid
->si_generation
< stidp
->si_generation
)
2140 if ((status
= nfs4_check_openmode(stp
,flags
)))
2142 renew_client(stp
->st_stateowner
->so_client
);
2144 *filpp
= stp
->st_vfs_file
;
2146 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2148 renew_client(dp
->dl_client
);
2149 if (flags
& DELEG_RET
)
2150 unhash_delegation(dp
);
2152 *filpp
= dp
->dl_vfs_file
;
2161 * Checks for sequence id mutating operations.
2164 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
)
2167 struct nfs4_stateid
*stp
;
2168 struct nfs4_stateowner
*sop
;
2170 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2171 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2172 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2173 stateid
->si_generation
);
2178 status
= nfserr_bad_stateid
;
2179 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2180 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2184 status
= nfserr_stale_stateid
;
2185 if (STALE_STATEID(stateid
))
2188 * We return BAD_STATEID if filehandle doesn't match stateid,
2189 * the confirmed flag is incorrecly set, or the generation
2190 * number is incorrect.
2191 * If there is no entry in the openfile table for this id,
2192 * we can't always return BAD_STATEID;
2193 * this might be a retransmitted CLOSE which has arrived after
2194 * the openfile has been released.
2196 if (!(stp
= find_stateid(stateid
, flags
)))
2197 goto no_nfs4_stateid
;
2199 status
= nfserr_bad_stateid
;
2201 /* for new lock stateowners:
2202 * check that the lock->v.new.open_stateid
2203 * refers to an open stateowner
2205 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2206 * as the open_stateid->st_stateowner->so_client->clientid
2209 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2210 struct nfs4_client
*clp
= sop
->so_client
;
2212 if (!sop
->so_is_open_owner
)
2214 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2218 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2219 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2224 *sopp
= sop
= stp
->st_stateowner
;
2227 * We now validate the seqid and stateid generation numbers.
2228 * For the moment, we ignore the possibility of
2229 * generation number wraparound.
2231 if (seqid
!= sop
->so_seqid
+ 1)
2234 if (sop
->so_confirmed
) {
2235 if (flags
& CONFIRM
) {
2236 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2241 if (!(flags
& CONFIRM
)) {
2242 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2246 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2247 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2251 status
= nfserr_old_stateid
;
2252 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2253 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2256 /* XXX renew the client lease here */
2265 * We determine whether this is a bad stateid or a replay,
2266 * starting by trying to look up the stateowner.
2267 * If stateowner is not found - stateid is bad.
2269 if (!(sop
= find_openstateowner_id(stateid
->si_stateownerid
, flags
))) {
2270 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2271 status
= nfserr_bad_stateid
;
2277 if (seqid
== sop
->so_seqid
) {
2278 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2279 /* indicate replay to calling function */
2280 status
= NFSERR_REPLAY_ME
;
2282 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop
->so_seqid
+1, seqid
);
2285 status
= nfserr_bad_seqid
;
2291 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
)
2294 struct nfs4_stateowner
*sop
;
2295 struct nfs4_stateid
*stp
;
2297 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2298 (int)current_fh
->fh_dentry
->d_name
.len
,
2299 current_fh
->fh_dentry
->d_name
.name
);
2301 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2306 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2307 &oc
->oc_req_stateid
,
2308 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2309 &oc
->oc_stateowner
, &stp
, NULL
)))
2312 sop
= oc
->oc_stateowner
;
2313 sop
->so_confirmed
= 1;
2314 update_stateid(&stp
->st_stateid
);
2315 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2316 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2317 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2318 stp
->st_stateid
.si_boot
,
2319 stp
->st_stateid
.si_stateownerid
,
2320 stp
->st_stateid
.si_fileid
,
2321 stp
->st_stateid
.si_generation
);
2323 if (oc
->oc_stateowner
)
2324 nfs4_get_stateowner(oc
->oc_stateowner
);
2325 nfs4_unlock_state();
2331 * unset all bits in union bitmap (bmap) that
2332 * do not exist in share (from successful OPEN_DOWNGRADE)
2335 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2338 for (i
= 1; i
< 4; i
++) {
2339 if ((i
& access
) != i
)
2340 __clear_bit(i
, bmap
);
2345 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2348 for (i
= 0; i
< 4; i
++) {
2349 if ((i
& deny
) != i
)
2350 __clear_bit(i
, bmap
);
2355 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
)
2358 struct nfs4_stateid
*stp
;
2359 unsigned int share_access
;
2361 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2362 (int)current_fh
->fh_dentry
->d_name
.len
,
2363 current_fh
->fh_dentry
->d_name
.name
);
2365 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2366 return nfserr_inval
;
2369 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2371 CHECK_FH
| OPEN_STATE
,
2372 &od
->od_stateowner
, &stp
, NULL
)))
2375 status
= nfserr_inval
;
2376 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2377 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2378 stp
->st_access_bmap
, od
->od_share_access
);
2381 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2382 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2383 stp
->st_deny_bmap
, od
->od_share_deny
);
2386 set_access(&share_access
, stp
->st_access_bmap
);
2387 nfs4_file_downgrade(stp
->st_vfs_file
,
2388 share_access
& ~od
->od_share_access
);
2390 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2391 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2393 update_stateid(&stp
->st_stateid
);
2394 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2397 if (od
->od_stateowner
)
2398 nfs4_get_stateowner(od
->od_stateowner
);
2399 nfs4_unlock_state();
2404 * nfs4_unlock_state() called after encode
2407 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
)
2410 struct nfs4_stateid
*stp
;
2412 dprintk("NFSD: nfsd4_close on file %.*s\n",
2413 (int)current_fh
->fh_dentry
->d_name
.len
,
2414 current_fh
->fh_dentry
->d_name
.name
);
2417 /* check close_lru for replay */
2418 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2420 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2421 &close
->cl_stateowner
, &stp
, NULL
)))
2424 * Return success, but first update the stateid.
2427 update_stateid(&stp
->st_stateid
);
2428 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2430 /* release_state_owner() calls nfsd_close() if needed */
2431 release_state_owner(stp
, OPEN_STATE
);
2433 if (close
->cl_stateowner
)
2434 nfs4_get_stateowner(close
->cl_stateowner
);
2435 nfs4_unlock_state();
2440 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2444 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2448 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2449 nfs4_unlock_state();
2456 * Lock owner state (byte-range locks)
2458 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2459 #define LOCK_HASH_BITS 8
2460 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2461 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2463 #define lockownerid_hashval(id) \
2464 ((id) & LOCK_HASH_MASK)
2466 static inline unsigned int
2467 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2468 struct xdr_netobj
*ownername
)
2470 return (file_hashval(inode
) + cl_id
2471 + opaque_hashval(ownername
->data
, ownername
->len
))
2475 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2476 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2477 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2479 static struct nfs4_stateid
*
2480 find_stateid(stateid_t
*stid
, int flags
)
2482 struct nfs4_stateid
*local
= NULL
;
2483 u32 st_id
= stid
->si_stateownerid
;
2484 u32 f_id
= stid
->si_fileid
;
2485 unsigned int hashval
;
2487 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2488 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2489 hashval
= stateid_hashval(st_id
, f_id
);
2490 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2491 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2492 (local
->st_stateid
.si_fileid
== f_id
))
2496 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2497 hashval
= stateid_hashval(st_id
, f_id
);
2498 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2499 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2500 (local
->st_stateid
.si_fileid
== f_id
))
2504 printk("NFSD: find_stateid: ERROR: no state flag\n");
2508 static struct nfs4_delegation
*
2509 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2511 struct nfs4_file
*fp
;
2512 struct nfs4_delegation
*dl
;
2514 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2515 stid
->si_boot
, stid
->si_stateownerid
,
2516 stid
->si_fileid
, stid
->si_generation
);
2518 fp
= find_file(ino
);
2521 dl
= find_delegation_file(fp
, stid
);
2527 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2528 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2529 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2530 * locking, this prevents us from being completely protocol-compliant. The
2531 * real solution to this problem is to start using unsigned file offsets in
2532 * the VFS, but this is a very deep change!
2535 nfs4_transform_lock_offset(struct file_lock
*lock
)
2537 if (lock
->fl_start
< 0)
2538 lock
->fl_start
= OFFSET_MAX
;
2539 if (lock
->fl_end
< 0)
2540 lock
->fl_end
= OFFSET_MAX
;
2544 nfs4_verify_lock_stateowner(struct nfs4_stateowner
*sop
, unsigned int hashval
)
2546 struct nfs4_stateowner
*local
= NULL
;
2549 if (hashval
>= LOCK_HASH_SIZE
)
2551 list_for_each_entry(local
, &lock_ownerid_hashtbl
[hashval
], so_idhash
) {
2563 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2565 struct nfs4_stateowner
*sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2566 unsigned int hval
= lockownerid_hashval(sop
->so_id
);
2568 deny
->ld_sop
= NULL
;
2569 if (nfs4_verify_lock_stateowner(sop
, hval
)) {
2570 kref_get(&sop
->so_ref
);
2572 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2574 deny
->ld_start
= fl
->fl_start
;
2575 deny
->ld_length
= ~(u64
)0;
2576 if (fl
->fl_end
!= ~(u64
)0)
2577 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2578 deny
->ld_type
= NFS4_READ_LT
;
2579 if (fl
->fl_type
!= F_RDLCK
)
2580 deny
->ld_type
= NFS4_WRITE_LT
;
2583 static struct nfs4_stateowner
*
2584 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2585 struct xdr_netobj
*owner
)
2587 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2588 struct nfs4_stateowner
*op
;
2590 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2591 if (cmp_owner_str(op
, owner
, clid
))
2598 * Alloc a lock owner structure.
2599 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2602 * strhashval = lock_ownerstr_hashval
2603 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2606 static struct nfs4_stateowner
*
2607 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2608 struct nfs4_stateowner
*sop
;
2609 struct nfs4_replay
*rp
;
2610 unsigned int idhashval
;
2612 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2614 idhashval
= lockownerid_hashval(current_ownerid
);
2615 INIT_LIST_HEAD(&sop
->so_idhash
);
2616 INIT_LIST_HEAD(&sop
->so_strhash
);
2617 INIT_LIST_HEAD(&sop
->so_perclient
);
2618 INIT_LIST_HEAD(&sop
->so_stateids
);
2619 INIT_LIST_HEAD(&sop
->so_perstateid
);
2620 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2622 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2623 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2624 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2625 sop
->so_is_open_owner
= 0;
2626 sop
->so_id
= current_ownerid
++;
2627 sop
->so_client
= clp
;
2628 sop
->so_seqid
= lock
->lk_new_lock_seqid
- 1;
2629 sop
->so_confirmed
= 1;
2630 rp
= &sop
->so_replay
;
2631 rp
->rp_status
= NFSERR_SERVERFAULT
;
2633 rp
->rp_buf
= rp
->rp_ibuf
;
2637 static struct nfs4_stateid
*
2638 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2640 struct nfs4_stateid
*stp
;
2641 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2643 stp
= nfs4_alloc_stateid();
2646 INIT_LIST_HEAD(&stp
->st_hash
);
2647 INIT_LIST_HEAD(&stp
->st_perfile
);
2648 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2649 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2650 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2651 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2652 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2653 stp
->st_stateowner
= sop
;
2656 stp
->st_stateid
.si_boot
= boot_time
;
2657 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2658 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2659 stp
->st_stateid
.si_generation
= 0;
2660 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2661 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2662 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2669 check_lock_length(u64 offset
, u64 length
)
2671 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2672 LOFF_OVERFLOW(offset
, length
)));
2679 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
)
2681 struct nfs4_stateowner
*open_sop
= NULL
;
2682 struct nfs4_stateid
*lock_stp
;
2684 struct file_lock file_lock
;
2685 struct file_lock
*conflock
;
2687 unsigned int strhashval
;
2689 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2690 (long long) lock
->lk_offset
,
2691 (long long) lock
->lk_length
);
2693 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2694 return nfserr_grace
;
2695 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2696 return nfserr_no_grace
;
2698 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2699 return nfserr_inval
;
2703 if (lock
->lk_is_new
) {
2705 * Client indicates that this is a new lockowner.
2706 * Use open owner and open stateid to create lock owner and lock
2709 struct nfs4_stateid
*open_stp
= NULL
;
2710 struct nfs4_file
*fp
;
2712 status
= nfserr_stale_clientid
;
2713 if (STALE_CLIENTID(&lock
->lk_new_clientid
)) {
2714 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2718 /* is the new lock seqid presented by the client zero? */
2719 status
= nfserr_bad_seqid
;
2720 if (lock
->v
.new.lock_seqid
!= 0)
2723 /* validate and update open stateid and open seqid */
2724 status
= nfs4_preprocess_seqid_op(current_fh
,
2725 lock
->lk_new_open_seqid
,
2726 &lock
->lk_new_open_stateid
,
2727 CHECK_FH
| OPEN_STATE
,
2728 &open_sop
, &open_stp
,
2729 &lock
->v
.new.clientid
);
2731 if (lock
->lk_reclaim
)
2732 status
= nfserr_reclaim_bad
;
2735 /* create lockowner and lock stateid */
2736 fp
= open_stp
->st_file
;
2737 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2738 open_sop
->so_client
->cl_clientid
.cl_id
,
2739 &lock
->v
.new.owner
);
2740 /* XXX: Do we need to check for duplicate stateowners on
2741 * the same file, or should they just be allowed (and
2742 * create new stateids)? */
2743 status
= nfserr_resource
;
2744 if (!(lock
->lk_stateowner
= alloc_init_lock_stateowner(strhashval
, open_sop
->so_client
, open_stp
, lock
)))
2746 if ((lock_stp
= alloc_init_lock_stateid(lock
->lk_stateowner
,
2747 fp
, open_stp
)) == NULL
) {
2748 release_stateowner(lock
->lk_stateowner
);
2749 lock
->lk_stateowner
= NULL
;
2752 /* bump the open seqid used to create the lock */
2753 open_sop
->so_seqid
++;
2755 /* lock (lock owner + lock stateid) already exists */
2756 status
= nfs4_preprocess_seqid_op(current_fh
,
2757 lock
->lk_old_lock_seqid
,
2758 &lock
->lk_old_lock_stateid
,
2759 CHECK_FH
| LOCK_STATE
,
2760 &lock
->lk_stateowner
, &lock_stp
, NULL
);
2764 /* lock->lk_stateowner and lock_stp have been created or found */
2765 filp
= lock_stp
->st_vfs_file
;
2767 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2768 printk("NFSD: nfsd4_lock: permission denied!\n");
2772 locks_init_lock(&file_lock
);
2773 switch (lock
->lk_type
) {
2776 file_lock
.fl_type
= F_RDLCK
;
2779 case NFS4_WRITEW_LT
:
2780 file_lock
.fl_type
= F_WRLCK
;
2783 status
= nfserr_inval
;
2786 file_lock
.fl_owner
= (fl_owner_t
) lock
->lk_stateowner
;
2787 file_lock
.fl_pid
= current
->tgid
;
2788 file_lock
.fl_file
= filp
;
2789 file_lock
.fl_flags
= FL_POSIX
;
2791 file_lock
.fl_start
= lock
->lk_offset
;
2792 if ((lock
->lk_length
== ~(u64
)0) ||
2793 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2794 file_lock
.fl_end
= ~(u64
)0;
2796 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2797 nfs4_transform_lock_offset(&file_lock
);
2800 * Try to lock the file in the VFS.
2801 * Note: locks.c uses the BKL to protect the inode's lock list.
2804 status
= posix_lock_file(filp
, &file_lock
);
2805 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2806 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2807 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status
);
2809 case 0: /* success! */
2810 update_stateid(&lock_stp
->st_stateid
);
2811 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2815 goto conflicting_lock
;
2817 status
= nfserr_deadlock
;
2819 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status
);
2820 goto out_destroy_new_stateid
;
2824 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2825 status
= nfserr_denied
;
2826 /* XXX There is a race here. Future patch needed to provide
2827 * an atomic posix_lock_and_test_file
2829 if (!(conflock
= posix_test_lock(filp
, &file_lock
))) {
2830 status
= nfserr_serverfault
;
2833 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
2835 out_destroy_new_stateid
:
2836 if (lock
->lk_is_new
) {
2837 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2839 * An error encountered after instantiation of the new
2840 * stateid has forced us to destroy it.
2842 if (!seqid_mutating_err(status
))
2843 open_sop
->so_seqid
--;
2845 release_state_owner(lock_stp
, LOCK_STATE
);
2848 if (lock
->lk_stateowner
)
2849 nfs4_get_stateowner(lock
->lk_stateowner
);
2850 nfs4_unlock_state();
2858 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2860 struct inode
*inode
;
2862 struct file_lock file_lock
;
2863 struct file_lock
*conflicting_lock
;
2866 if (nfs4_in_grace())
2867 return nfserr_grace
;
2869 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2870 return nfserr_inval
;
2872 lockt
->lt_stateowner
= NULL
;
2875 status
= nfserr_stale_clientid
;
2876 if (STALE_CLIENTID(&lockt
->lt_clientid
)) {
2877 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2881 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2882 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2883 if (status
== nfserr_symlink
)
2884 status
= nfserr_inval
;
2888 inode
= current_fh
->fh_dentry
->d_inode
;
2889 locks_init_lock(&file_lock
);
2890 switch (lockt
->lt_type
) {
2893 file_lock
.fl_type
= F_RDLCK
;
2896 case NFS4_WRITEW_LT
:
2897 file_lock
.fl_type
= F_WRLCK
;
2900 printk("NFSD: nfs4_lockt: bad lock type!\n");
2901 status
= nfserr_inval
;
2905 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2906 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2907 if (lockt
->lt_stateowner
)
2908 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2909 file_lock
.fl_pid
= current
->tgid
;
2910 file_lock
.fl_flags
= FL_POSIX
;
2912 file_lock
.fl_start
= lockt
->lt_offset
;
2913 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2914 file_lock
.fl_end
= ~(u64
)0;
2916 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2918 nfs4_transform_lock_offset(&file_lock
);
2920 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2921 * since LOCKT doesn't require an OPEN, and therefore a struct
2922 * file may not exist, pass posix_test_lock a struct file with
2923 * only the dentry:inode set.
2925 memset(&file
, 0, sizeof (struct file
));
2926 file
.f_dentry
= current_fh
->fh_dentry
;
2929 conflicting_lock
= posix_test_lock(&file
, &file_lock
);
2930 if (conflicting_lock
) {
2931 status
= nfserr_denied
;
2932 nfs4_set_lock_denied(conflicting_lock
, &lockt
->lt_denied
);
2935 nfs4_unlock_state();
2940 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
)
2942 struct nfs4_stateid
*stp
;
2943 struct file
*filp
= NULL
;
2944 struct file_lock file_lock
;
2947 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2948 (long long) locku
->lu_offset
,
2949 (long long) locku
->lu_length
);
2951 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2952 return nfserr_inval
;
2956 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
2959 CHECK_FH
| LOCK_STATE
,
2960 &locku
->lu_stateowner
, &stp
, NULL
)))
2963 filp
= stp
->st_vfs_file
;
2965 locks_init_lock(&file_lock
);
2966 file_lock
.fl_type
= F_UNLCK
;
2967 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2968 file_lock
.fl_pid
= current
->tgid
;
2969 file_lock
.fl_file
= filp
;
2970 file_lock
.fl_flags
= FL_POSIX
;
2971 file_lock
.fl_start
= locku
->lu_offset
;
2973 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2974 file_lock
.fl_end
= ~(u64
)0;
2976 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2977 nfs4_transform_lock_offset(&file_lock
);
2980 * Try to unlock the file in the VFS.
2982 status
= posix_lock_file(filp
, &file_lock
);
2983 if (file_lock
.fl_ops
&& file_lock
.fl_ops
->fl_release_private
)
2984 file_lock
.fl_ops
->fl_release_private(&file_lock
);
2986 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2990 * OK, unlock succeeded; the only thing left to do is update the stateid.
2992 update_stateid(&stp
->st_stateid
);
2993 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2996 if (locku
->lu_stateowner
)
2997 nfs4_get_stateowner(locku
->lu_stateowner
);
2998 nfs4_unlock_state();
3002 status
= nfserrno(status
);
3008 * 1: locks held by lockowner
3009 * 0: no locks held by lockowner
3012 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3014 struct file_lock
**flpp
;
3015 struct inode
*inode
= filp
->f_dentry
->d_inode
;
3019 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3020 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
)
3030 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
3032 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3033 struct nfs4_stateowner
*sop
;
3034 struct nfs4_stateid
*stp
;
3035 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3036 struct list_head matches
;
3040 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3041 clid
->cl_boot
, clid
->cl_id
);
3043 /* XXX check for lease expiration */
3045 status
= nfserr_stale_clientid
;
3046 if (STALE_CLIENTID(clid
)) {
3047 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3053 status
= nfserr_locks_held
;
3054 /* XXX: we're doing a linear search through all the lockowners.
3055 * Yipes! For now we'll just hope clients aren't really using
3056 * release_lockowner much, but eventually we have to fix these
3057 * data structures. */
3058 INIT_LIST_HEAD(&matches
);
3059 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3060 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
3061 if (!cmp_owner_str(sop
, owner
, clid
))
3063 list_for_each_entry(stp
, &sop
->so_stateids
,
3065 if (check_for_locks(stp
->st_vfs_file
, sop
))
3067 /* Note: so_perclient unused for lockowners,
3068 * so it's OK to fool with here. */
3069 list_add(&sop
->so_perclient
, &matches
);
3073 /* Clients probably won't expect us to return with some (but not all)
3074 * of the lockowner state released; so don't release any until all
3075 * have been checked. */
3077 list_for_each_entry(sop
, &matches
, so_perclient
) {
3078 release_stateowner(sop
);
3081 nfs4_unlock_state();
3085 static inline struct nfs4_client_reclaim
*
3088 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3092 * failure => all reset bets are off, nfserr_no_grace...
3095 nfs4_client_to_reclaim(char *name
)
3097 unsigned int strhashval
;
3098 struct nfs4_client_reclaim
*crp
= NULL
;
3100 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3101 crp
= alloc_reclaim();
3104 strhashval
= clientstr_hashval(name
);
3105 INIT_LIST_HEAD(&crp
->cr_strhash
);
3106 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3107 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3108 reclaim_str_hashtbl_size
++;
3113 nfs4_release_reclaim(void)
3115 struct nfs4_client_reclaim
*crp
= NULL
;
3118 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3119 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3120 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3121 struct nfs4_client_reclaim
, cr_strhash
);
3122 list_del(&crp
->cr_strhash
);
3124 reclaim_str_hashtbl_size
--;
3127 BUG_ON(reclaim_str_hashtbl_size
);
3131 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3132 static struct nfs4_client_reclaim
*
3133 nfs4_find_reclaim_client(clientid_t
*clid
)
3135 unsigned int strhashval
;
3136 struct nfs4_client
*clp
;
3137 struct nfs4_client_reclaim
*crp
= NULL
;
3140 /* find clientid in conf_id_hashtbl */
3141 clp
= find_confirmed_client(clid
);
3145 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3146 clp
->cl_name
.len
, clp
->cl_name
.data
,
3149 /* find clp->cl_name in reclaim_str_hashtbl */
3150 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3151 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3152 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3160 * Called from OPEN. Look for clientid in reclaim list.
3163 nfs4_check_open_reclaim(clientid_t
*clid
)
3165 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3168 /* initialization to perform at module load time: */
3171 nfs4_state_init(void)
3175 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3176 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3177 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3178 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3179 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3181 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3182 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3184 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3185 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3186 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3188 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3189 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3190 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3192 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3193 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3194 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3196 memset(&onestateid
, ~0, sizeof(stateid_t
));
3197 INIT_LIST_HEAD(&close_lru
);
3198 INIT_LIST_HEAD(&client_lru
);
3199 INIT_LIST_HEAD(&del_recall_lru
);
3200 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3201 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3202 reclaim_str_hashtbl_size
= 0;
3205 /* initialization to perform when the nfsd service is started: */
3208 __nfs4_state_start(void)
3212 boot_time
= get_seconds();
3213 grace_time
= max(user_lease_time
, lease_time
);
3214 lease_time
= user_lease_time
;
3216 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3217 laundry_wq
= create_singlethread_workqueue("nfsd4");
3218 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
*HZ
);
3222 nfs4_state_start(void)
3228 status
= nfsd4_init_slabs();
3231 __nfs4_state_start();
3243 nfs4_lease_time(void)
3249 __nfs4_state_shutdown(void)
3252 struct nfs4_client
*clp
= NULL
;
3253 struct nfs4_delegation
*dp
= NULL
;
3254 struct nfs4_stateowner
*sop
= NULL
;
3255 struct list_head
*pos
, *next
, reaplist
;
3257 list_for_each_safe(pos
, next
, &close_lru
) {
3258 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3259 list_del(&sop
->so_close_lru
);
3260 nfs4_put_stateowner(sop
);
3263 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3264 while (!list_empty(&conf_id_hashtbl
[i
])) {
3265 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3268 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3269 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3273 INIT_LIST_HEAD(&reaplist
);
3274 spin_lock(&recall_lock
);
3275 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3276 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3277 list_move(&dp
->dl_recall_lru
, &reaplist
);
3279 spin_unlock(&recall_lock
);
3280 list_for_each_safe(pos
, next
, &reaplist
) {
3281 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3282 list_del_init(&dp
->dl_recall_lru
);
3283 unhash_delegation(dp
);
3286 cancel_delayed_work(&laundromat_work
);
3287 flush_workqueue(laundry_wq
);
3288 destroy_workqueue(laundry_wq
);
3293 nfs4_state_shutdown(void)
3296 nfs4_release_reclaim();
3297 __nfs4_state_shutdown();
3299 nfs4_unlock_state();
3303 * Called when leasetime is changed.
3305 * The only way the protocol gives us to handle on-the-fly lease changes is to
3306 * simulate a reboot. Instead of doing that, we just wait till the next time
3307 * we start to register any changes in lease time. If the administrator
3308 * really wants to change the lease time *now*, they can go ahead and bring
3309 * nfsd down and then back up again after changing the lease time.
3312 nfs4_reset_lease(time_t leasetime
)
3315 user_lease_time
= leasetime
;