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>
51 #include <linux/namei.h>
52 #include <linux/swap.h>
53 #include <linux/mutex.h>
54 #include <linux/lockd/bind.h>
55 #include <linux/module.h>
57 #define NFSDDBG_FACILITY NFSDDBG_PROC
60 static time_t lease_time
= 90; /* default lease time */
61 static time_t user_lease_time
= 90;
62 static time_t boot_time
;
63 static int in_grace
= 1;
64 static u32 current_clientid
= 1;
65 static u32 current_ownerid
= 1;
66 static u32 current_fileid
= 1;
67 static u32 current_delegid
= 1;
69 static stateid_t zerostateid
; /* bits all 0 */
70 static stateid_t onestateid
; /* bits all 1 */
72 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
73 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
77 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
78 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
79 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
80 static void nfs4_set_recdir(char *recdir
);
85 * protects clientid_hashtbl[], clientstr_hashtbl[],
86 * unconfstr_hashtbl[], uncofid_hashtbl[].
88 static DEFINE_MUTEX(client_mutex
);
90 static struct kmem_cache
*stateowner_slab
= NULL
;
91 static struct kmem_cache
*file_slab
= NULL
;
92 static struct kmem_cache
*stateid_slab
= NULL
;
93 static struct kmem_cache
*deleg_slab
= NULL
;
98 mutex_lock(&client_mutex
);
102 nfs4_unlock_state(void)
104 mutex_unlock(&client_mutex
);
108 opaque_hashval(const void *ptr
, int nbytes
)
110 unsigned char *cptr
= (unsigned char *) ptr
;
120 /* forward declarations */
121 static void release_stateowner(struct nfs4_stateowner
*sop
);
122 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
128 /* recall_lock protects the del_recall_lru */
129 static DEFINE_SPINLOCK(recall_lock
);
130 static struct list_head del_recall_lru
;
133 free_nfs4_file(struct kref
*kref
)
135 struct nfs4_file
*fp
= container_of(kref
, struct nfs4_file
, fi_ref
);
136 list_del(&fp
->fi_hash
);
138 kmem_cache_free(file_slab
, fp
);
142 put_nfs4_file(struct nfs4_file
*fi
)
144 kref_put(&fi
->fi_ref
, free_nfs4_file
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 kref_get(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned int max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for nfs4_stateowner */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 #define ownerid_hashval(id) \
166 ((id) & OWNER_HASH_MASK)
167 #define ownerstr_hashval(clientid, ownername) \
168 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
170 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
171 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
173 /* hash table for nfs4_file */
174 #define FILE_HASH_BITS 8
175 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
176 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
177 /* hash table for (open)nfs4_stateid */
178 #define STATEID_HASH_BITS 10
179 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
180 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
182 #define file_hashval(x) \
183 hash_ptr(x, FILE_HASH_BITS)
184 #define stateid_hashval(owner_id, file_id) \
185 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
187 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
188 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
190 static struct nfs4_delegation
*
191 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
193 struct nfs4_delegation
*dp
;
194 struct nfs4_file
*fp
= stp
->st_file
;
195 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
197 dprintk("NFSD alloc_init_deleg\n");
198 if (fp
->fi_had_conflict
)
200 if (num_delegations
> max_delegations
)
202 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
206 INIT_LIST_HEAD(&dp
->dl_perfile
);
207 INIT_LIST_HEAD(&dp
->dl_perclnt
);
208 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
213 get_file(stp
->st_vfs_file
);
214 dp
->dl_vfs_file
= stp
->st_vfs_file
;
216 dp
->dl_recall
.cbr_dp
= NULL
;
217 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
218 dp
->dl_recall
.cbr_trunc
= 0;
219 dp
->dl_stateid
.si_boot
= boot_time
;
220 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
221 dp
->dl_stateid
.si_fileid
= 0;
222 dp
->dl_stateid
.si_generation
= 0;
223 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
224 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
225 current_fh
->fh_handle
.fh_size
);
227 atomic_set(&dp
->dl_count
, 1);
228 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
229 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
234 nfs4_put_delegation(struct nfs4_delegation
*dp
)
236 if (atomic_dec_and_test(&dp
->dl_count
)) {
237 dprintk("NFSD: freeing dp %p\n",dp
);
238 put_nfs4_file(dp
->dl_file
);
239 kmem_cache_free(deleg_slab
, dp
);
244 /* Remove the associated file_lock first, then remove the delegation.
245 * lease_modify() is called to remove the FS_LEASE file_lock from
246 * the i_flock list, eventually calling nfsd's lock_manager
247 * fl_release_callback.
250 nfs4_close_delegation(struct nfs4_delegation
*dp
)
252 struct file
*filp
= dp
->dl_vfs_file
;
254 dprintk("NFSD: close_delegation dp %p\n",dp
);
255 dp
->dl_vfs_file
= NULL
;
256 /* The following nfsd_close may not actually close the file,
257 * but we want to remove the lease in any case. */
259 vfs_setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
263 /* Called under the state lock. */
265 unhash_delegation(struct nfs4_delegation
*dp
)
267 list_del_init(&dp
->dl_perfile
);
268 list_del_init(&dp
->dl_perclnt
);
269 spin_lock(&recall_lock
);
270 list_del_init(&dp
->dl_recall_lru
);
271 spin_unlock(&recall_lock
);
272 nfs4_close_delegation(dp
);
273 nfs4_put_delegation(dp
);
280 /* Hash tables for nfs4_clientid state */
281 #define CLIENT_HASH_BITS 4
282 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
283 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
285 #define clientid_hashval(id) \
286 ((id) & CLIENT_HASH_MASK)
287 #define clientstr_hashval(name) \
288 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
290 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
291 * used in reboot/reset lease grace period processing
293 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
294 * setclientid_confirmed info.
296 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
299 * client_lru holds client queue ordered by nfs4_client.cl_time
302 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
303 * for last close replay.
305 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
306 static int reclaim_str_hashtbl_size
= 0;
307 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
308 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
309 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
310 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
311 static struct list_head client_lru
;
312 static struct list_head close_lru
;
315 renew_client(struct nfs4_client
*clp
)
318 * Move client to the end to the LRU list.
320 dprintk("renewing client (clientid %08x/%08x)\n",
321 clp
->cl_clientid
.cl_boot
,
322 clp
->cl_clientid
.cl_id
);
323 list_move_tail(&clp
->cl_lru
, &client_lru
);
324 clp
->cl_time
= get_seconds();
327 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
329 STALE_CLIENTID(clientid_t
*clid
)
331 if (clid
->cl_boot
== boot_time
)
333 dprintk("NFSD stale clientid (%08x/%08x)\n",
334 clid
->cl_boot
, clid
->cl_id
);
339 * XXX Should we use a slab cache ?
340 * This type of memory management is somewhat inefficient, but we use it
341 * anyway since SETCLIENTID is not a common operation.
343 static inline struct nfs4_client
*
344 alloc_client(struct xdr_netobj name
)
346 struct nfs4_client
*clp
;
348 if ((clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
349 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
350 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
351 clp
->cl_name
.len
= name
.len
;
362 free_client(struct nfs4_client
*clp
)
364 if (clp
->cl_cred
.cr_group_info
)
365 put_group_info(clp
->cl_cred
.cr_group_info
);
366 kfree(clp
->cl_name
.data
);
371 put_nfs4_client(struct nfs4_client
*clp
)
373 if (atomic_dec_and_test(&clp
->cl_count
))
378 shutdown_callback_client(struct nfs4_client
*clp
)
380 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
382 /* shutdown rpc client, ending any outstanding recall rpcs */
384 clp
->cl_callback
.cb_client
= NULL
;
385 rpc_shutdown_client(clnt
);
390 expire_client(struct nfs4_client
*clp
)
392 struct nfs4_stateowner
*sop
;
393 struct nfs4_delegation
*dp
;
394 struct list_head reaplist
;
396 dprintk("NFSD: expire_client cl_count %d\n",
397 atomic_read(&clp
->cl_count
));
399 shutdown_callback_client(clp
);
401 INIT_LIST_HEAD(&reaplist
);
402 spin_lock(&recall_lock
);
403 while (!list_empty(&clp
->cl_delegations
)) {
404 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
405 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
407 list_del_init(&dp
->dl_perclnt
);
408 list_move(&dp
->dl_recall_lru
, &reaplist
);
410 spin_unlock(&recall_lock
);
411 while (!list_empty(&reaplist
)) {
412 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
413 list_del_init(&dp
->dl_recall_lru
);
414 unhash_delegation(dp
);
416 list_del(&clp
->cl_idhash
);
417 list_del(&clp
->cl_strhash
);
418 list_del(&clp
->cl_lru
);
419 while (!list_empty(&clp
->cl_openowners
)) {
420 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
421 release_stateowner(sop
);
423 put_nfs4_client(clp
);
426 static struct nfs4_client
*
427 create_client(struct xdr_netobj name
, char *recdir
) {
428 struct nfs4_client
*clp
;
430 if (!(clp
= alloc_client(name
)))
432 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
433 atomic_set(&clp
->cl_count
, 1);
434 atomic_set(&clp
->cl_callback
.cb_set
, 0);
435 INIT_LIST_HEAD(&clp
->cl_idhash
);
436 INIT_LIST_HEAD(&clp
->cl_strhash
);
437 INIT_LIST_HEAD(&clp
->cl_openowners
);
438 INIT_LIST_HEAD(&clp
->cl_delegations
);
439 INIT_LIST_HEAD(&clp
->cl_lru
);
445 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
446 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
450 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
451 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
452 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
456 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
458 target
->cr_uid
= source
->cr_uid
;
459 target
->cr_gid
= source
->cr_gid
;
460 target
->cr_group_info
= source
->cr_group_info
;
461 get_group_info(target
->cr_group_info
);
465 same_name(const char *n1
, const char *n2
)
467 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
471 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
473 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
477 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
479 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
482 /* XXX what about NGROUP */
484 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
486 return cr1
->cr_uid
== cr2
->cr_uid
;
490 gen_clid(struct nfs4_client
*clp
) {
491 clp
->cl_clientid
.cl_boot
= boot_time
;
492 clp
->cl_clientid
.cl_id
= current_clientid
++;
496 gen_confirm(struct nfs4_client
*clp
) {
501 p
= (u32
*)clp
->cl_confirm
.data
;
507 check_name(struct xdr_netobj name
) {
511 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
512 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
519 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
521 unsigned int idhashval
;
523 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
524 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
525 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
526 list_add_tail(&clp
->cl_lru
, &client_lru
);
527 clp
->cl_time
= get_seconds();
531 move_to_confirmed(struct nfs4_client
*clp
)
533 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
534 unsigned int strhashval
;
536 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
537 list_del_init(&clp
->cl_strhash
);
538 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
539 strhashval
= clientstr_hashval(clp
->cl_recdir
);
540 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
544 static struct nfs4_client
*
545 find_confirmed_client(clientid_t
*clid
)
547 struct nfs4_client
*clp
;
548 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
550 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
551 if (same_clid(&clp
->cl_clientid
, clid
))
557 static struct nfs4_client
*
558 find_unconfirmed_client(clientid_t
*clid
)
560 struct nfs4_client
*clp
;
561 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
563 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
564 if (same_clid(&clp
->cl_clientid
, clid
))
570 static struct nfs4_client
*
571 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
573 struct nfs4_client
*clp
;
575 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
576 if (same_name(clp
->cl_recdir
, dname
))
582 static struct nfs4_client
*
583 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
585 struct nfs4_client
*clp
;
587 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
588 if (same_name(clp
->cl_recdir
, dname
))
594 /* a helper function for parse_callback */
596 parse_octet(unsigned int *lenp
, char **addrp
)
598 unsigned int len
= *lenp
;
610 if ((c
< '0') || (c
> '9')) {
616 n
= (n
* 10) + (c
- '0');
627 /* parse and set the setclientid ipv4 callback address */
629 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
634 u32 addrlen
= addr_len
;
635 char *addr
= addr_val
;
640 for(i
= 4; i
> 0 ; i
--) {
641 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
644 cbaddr
|= (temp
<< shift
);
652 for(i
= 2; i
> 0 ; i
--) {
653 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
656 cbport
|= (temp
<< shift
);
665 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
667 struct nfs4_callback
*cb
= &clp
->cl_callback
;
669 /* Currently, we only support tcp for the callback channel */
670 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
673 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
674 &cb
->cb_addr
, &cb
->cb_port
)))
676 cb
->cb_prog
= se
->se_callback_prog
;
677 cb
->cb_ident
= se
->se_callback_ident
;
680 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
681 "will not receive delegations\n",
682 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
688 * RFC 3010 has a complex implmentation description of processing a
689 * SETCLIENTID request consisting of 5 bullets, labeled as
690 * CASE0 - CASE4 below.
693 * callback information will be processed in a future patch
695 * an unconfirmed record is added when:
696 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
697 * CASE 1: confirmed record found with matching name, principal,
698 * verifier, and clientid.
699 * CASE 2: confirmed record found with matching name, principal,
700 * and there is no unconfirmed record with matching
703 * an unconfirmed record is replaced when:
704 * CASE 3: confirmed record found with matching name, principal,
705 * and an unconfirmed record is found with matching
706 * name, principal, and with clientid and
707 * confirm that does not match the confirmed record.
708 * CASE 4: there is no confirmed record with matching name and
709 * principal. there is an unconfirmed record with
710 * matching name, principal.
712 * an unconfirmed record is deleted when:
713 * CASE 1: an unconfirmed record that matches input name, verifier,
714 * and confirmed clientid.
715 * CASE 4: any unconfirmed records with matching name and principal
716 * that exist after an unconfirmed record has been replaced
717 * as described above.
721 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
722 struct nfsd4_setclientid
*setclid
)
724 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
725 struct xdr_netobj clname
= {
726 .len
= setclid
->se_namelen
,
727 .data
= setclid
->se_name
,
729 nfs4_verifier clverifier
= setclid
->se_verf
;
730 unsigned int strhashval
;
731 struct nfs4_client
*conf
, *unconf
, *new;
733 char dname
[HEXDIR_LEN
];
735 if (!check_name(clname
))
738 status
= nfs4_make_rec_clidname(dname
, &clname
);
743 * XXX The Duplicate Request Cache (DRC) has been checked (??)
744 * We get here on a DRC miss.
747 strhashval
= clientstr_hashval(dname
);
750 conf
= find_confirmed_client_by_str(dname
, strhashval
);
754 * clname match, confirmed, different principal
755 * or different ip_address
757 status
= nfserr_clid_inuse
;
758 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
759 || conf
->cl_addr
!= sin
->sin_addr
.s_addr
) {
760 dprintk("NFSD: setclientid: string in use by client"
761 "at %u.%u.%u.%u\n", NIPQUAD(conf
->cl_addr
));
765 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
766 status
= nfserr_resource
;
770 * placed first, because it is the normal case.
773 expire_client(unconf
);
774 new = create_client(clname
, dname
);
777 copy_verf(new, &clverifier
);
778 new->cl_addr
= sin
->sin_addr
.s_addr
;
779 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
782 gen_callback(new, setclid
);
783 add_to_unconfirmed(new, strhashval
);
784 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
787 * cl_name match, confirmed, principal match
788 * verifier match: probable callback update
790 * remove any unconfirmed nfs4_client with
791 * matching cl_name, cl_verifier, and cl_clientid
793 * create and insert an unconfirmed nfs4_client with same
794 * cl_name, cl_verifier, and cl_clientid as existing
795 * nfs4_client, but with the new callback info and a
799 /* Note this is removing unconfirmed {*x***},
800 * which is stronger than RFC recommended {vxc**}.
801 * This has the advantage that there is at most
802 * one {*x***} in either list at any time.
804 expire_client(unconf
);
806 new = create_client(clname
, dname
);
809 copy_verf(new,&conf
->cl_verifier
);
810 new->cl_addr
= sin
->sin_addr
.s_addr
;
811 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
812 copy_clid(new, conf
);
814 gen_callback(new, setclid
);
815 add_to_unconfirmed(new,strhashval
);
816 } else if (!unconf
) {
819 * clname match, confirmed, principal match
820 * verfier does not match
821 * no unconfirmed. create a new unconfirmed nfs4_client
822 * using input clverifier, clname, and callback info
823 * and generate a new cl_clientid and cl_confirm.
825 new = create_client(clname
, dname
);
828 copy_verf(new,&clverifier
);
829 new->cl_addr
= sin
->sin_addr
.s_addr
;
830 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
833 gen_callback(new, setclid
);
834 add_to_unconfirmed(new, strhashval
);
835 } else if (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
838 * confirmed found (name, principal match)
839 * confirmed verifier does not match input clverifier
841 * unconfirmed found (name match)
842 * confirmed->cl_confirm != unconfirmed->cl_confirm
844 * remove unconfirmed.
846 * create an unconfirmed nfs4_client
847 * with same cl_name as existing confirmed nfs4_client,
848 * but with new callback info, new cl_clientid,
849 * new cl_verifier and a new cl_confirm
851 expire_client(unconf
);
852 new = create_client(clname
, dname
);
855 copy_verf(new,&clverifier
);
856 new->cl_addr
= sin
->sin_addr
.s_addr
;
857 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
860 gen_callback(new, setclid
);
861 add_to_unconfirmed(new, strhashval
);
863 /* No cases hit !!! */
864 status
= nfserr_inval
;
868 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
869 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
870 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
879 * RFC 3010 has a complex implmentation description of processing a
880 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
881 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
883 * NOTE: callback information will be processed here in a future patch
886 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
887 struct nfsd4_compound_state
*cstate
,
888 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
890 struct sockaddr_in
*sin
= svc_addr_in(rqstp
);
891 struct nfs4_client
*conf
, *unconf
;
892 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
893 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
896 if (STALE_CLIENTID(clid
))
897 return nfserr_stale_clientid
;
899 * XXX The Duplicate Request Cache (DRC) has been checked (??)
900 * We get here on a DRC miss.
905 conf
= find_confirmed_client(clid
);
906 unconf
= find_unconfirmed_client(clid
);
908 status
= nfserr_clid_inuse
;
909 if (conf
&& conf
->cl_addr
!= sin
->sin_addr
.s_addr
)
911 if (unconf
&& unconf
->cl_addr
!= sin
->sin_addr
.s_addr
)
914 if ((conf
&& unconf
) &&
915 (same_verf(&unconf
->cl_confirm
, &confirm
)) &&
916 (same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
917 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
918 (!same_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
920 * unconf record that matches input clientid and input confirm.
921 * conf record that matches input clientid.
922 * conf and unconf records match names, verifiers
924 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
925 status
= nfserr_clid_inuse
;
927 /* XXX: We just turn off callbacks until we can handle
928 * change request correctly. */
929 atomic_set(&conf
->cl_callback
.cb_set
, 0);
931 nfsd4_remove_clid_dir(unconf
);
932 expire_client(unconf
);
936 } else if ((conf
&& !unconf
) ||
938 (!same_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
939 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
941 * conf record that matches input clientid.
942 * if unconf record matches input clientid, then
943 * unconf->cl_name or unconf->cl_verifier don't match the
946 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
947 status
= nfserr_clid_inuse
;
950 } else if (!conf
&& unconf
951 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
953 * conf record not found.
954 * unconf record found.
955 * unconf->cl_confirm matches input confirm
957 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
958 status
= nfserr_clid_inuse
;
961 clientstr_hashval(unconf
->cl_recdir
);
962 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
965 nfsd4_remove_clid_dir(conf
);
968 move_to_confirmed(unconf
);
972 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
973 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
976 * conf record not found, or if conf, conf->cl_confirm does not
977 * match input confirm.
978 * unconf record not found, or if unconf, unconf->cl_confirm
979 * does not match input confirm.
981 status
= nfserr_stale_clientid
;
983 /* check that we have hit one of the cases...*/
984 status
= nfserr_clid_inuse
;
988 nfsd4_probe_callback(conf
);
993 /* OPEN Share state helper functions */
994 static inline struct nfs4_file
*
995 alloc_init_file(struct inode
*ino
)
997 struct nfs4_file
*fp
;
998 unsigned int hashval
= file_hashval(ino
);
1000 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
1002 kref_init(&fp
->fi_ref
);
1003 INIT_LIST_HEAD(&fp
->fi_hash
);
1004 INIT_LIST_HEAD(&fp
->fi_stateids
);
1005 INIT_LIST_HEAD(&fp
->fi_delegations
);
1006 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
1007 fp
->fi_inode
= igrab(ino
);
1008 fp
->fi_id
= current_fileid
++;
1009 fp
->fi_had_conflict
= false;
1016 nfsd4_free_slab(struct kmem_cache
**slab
)
1020 kmem_cache_destroy(*slab
);
1025 nfsd4_free_slabs(void)
1027 nfsd4_free_slab(&stateowner_slab
);
1028 nfsd4_free_slab(&file_slab
);
1029 nfsd4_free_slab(&stateid_slab
);
1030 nfsd4_free_slab(&deleg_slab
);
1034 nfsd4_init_slabs(void)
1036 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1037 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
1038 if (stateowner_slab
== NULL
)
1040 file_slab
= kmem_cache_create("nfsd4_files",
1041 sizeof(struct nfs4_file
), 0, 0, NULL
);
1042 if (file_slab
== NULL
)
1044 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1045 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
1046 if (stateid_slab
== NULL
)
1048 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1049 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
1050 if (deleg_slab
== NULL
)
1055 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1060 nfs4_free_stateowner(struct kref
*kref
)
1062 struct nfs4_stateowner
*sop
=
1063 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1064 kfree(sop
->so_owner
.data
);
1065 kmem_cache_free(stateowner_slab
, sop
);
1068 static inline struct nfs4_stateowner
*
1069 alloc_stateowner(struct xdr_netobj
*owner
)
1071 struct nfs4_stateowner
*sop
;
1073 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1074 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1075 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1076 sop
->so_owner
.len
= owner
->len
;
1077 kref_init(&sop
->so_ref
);
1080 kmem_cache_free(stateowner_slab
, sop
);
1085 static struct nfs4_stateowner
*
1086 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1087 struct nfs4_stateowner
*sop
;
1088 struct nfs4_replay
*rp
;
1089 unsigned int idhashval
;
1091 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1093 idhashval
= ownerid_hashval(current_ownerid
);
1094 INIT_LIST_HEAD(&sop
->so_idhash
);
1095 INIT_LIST_HEAD(&sop
->so_strhash
);
1096 INIT_LIST_HEAD(&sop
->so_perclient
);
1097 INIT_LIST_HEAD(&sop
->so_stateids
);
1098 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1099 INIT_LIST_HEAD(&sop
->so_close_lru
);
1101 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1102 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1103 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1104 sop
->so_is_open_owner
= 1;
1105 sop
->so_id
= current_ownerid
++;
1106 sop
->so_client
= clp
;
1107 sop
->so_seqid
= open
->op_seqid
;
1108 sop
->so_confirmed
= 0;
1109 rp
= &sop
->so_replay
;
1110 rp
->rp_status
= nfserr_serverfault
;
1112 rp
->rp_buf
= rp
->rp_ibuf
;
1117 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1119 struct nfs4_stateowner
*lock_sop
;
1121 while (!list_empty(&open_stp
->st_lockowners
)) {
1122 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1123 struct nfs4_stateowner
, so_perstateid
);
1124 /* list_del(&open_stp->st_lockowners); */
1125 BUG_ON(lock_sop
->so_is_open_owner
);
1126 release_stateowner(lock_sop
);
1131 unhash_stateowner(struct nfs4_stateowner
*sop
)
1133 struct nfs4_stateid
*stp
;
1135 list_del(&sop
->so_idhash
);
1136 list_del(&sop
->so_strhash
);
1137 if (sop
->so_is_open_owner
)
1138 list_del(&sop
->so_perclient
);
1139 list_del(&sop
->so_perstateid
);
1140 while (!list_empty(&sop
->so_stateids
)) {
1141 stp
= list_entry(sop
->so_stateids
.next
,
1142 struct nfs4_stateid
, st_perstateowner
);
1143 if (sop
->so_is_open_owner
)
1144 release_stateid(stp
, OPEN_STATE
);
1146 release_stateid(stp
, LOCK_STATE
);
1151 release_stateowner(struct nfs4_stateowner
*sop
)
1153 unhash_stateowner(sop
);
1154 list_del(&sop
->so_close_lru
);
1155 nfs4_put_stateowner(sop
);
1159 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1160 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1161 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1163 INIT_LIST_HEAD(&stp
->st_hash
);
1164 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1165 INIT_LIST_HEAD(&stp
->st_lockowners
);
1166 INIT_LIST_HEAD(&stp
->st_perfile
);
1167 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1168 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1169 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1170 stp
->st_stateowner
= sop
;
1173 stp
->st_stateid
.si_boot
= boot_time
;
1174 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1175 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1176 stp
->st_stateid
.si_generation
= 0;
1177 stp
->st_access_bmap
= 0;
1178 stp
->st_deny_bmap
= 0;
1179 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1180 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1181 stp
->st_openstp
= NULL
;
1185 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1187 struct file
*filp
= stp
->st_vfs_file
;
1189 list_del(&stp
->st_hash
);
1190 list_del(&stp
->st_perfile
);
1191 list_del(&stp
->st_perstateowner
);
1192 if (flags
& OPEN_STATE
) {
1193 release_stateid_lockowners(stp
);
1194 stp
->st_vfs_file
= NULL
;
1196 } else if (flags
& LOCK_STATE
)
1197 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1198 put_nfs4_file(stp
->st_file
);
1199 kmem_cache_free(stateid_slab
, stp
);
1203 move_to_close_lru(struct nfs4_stateowner
*sop
)
1205 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1207 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1208 sop
->so_time
= get_seconds();
1212 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1215 return (sop
->so_owner
.len
== owner
->len
) &&
1216 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1217 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1220 static struct nfs4_stateowner
*
1221 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1223 struct nfs4_stateowner
*so
= NULL
;
1225 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1226 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1232 /* search file_hashtbl[] for file */
1233 static struct nfs4_file
*
1234 find_file(struct inode
*ino
)
1236 unsigned int hashval
= file_hashval(ino
);
1237 struct nfs4_file
*fp
;
1239 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1240 if (fp
->fi_inode
== ino
) {
1248 static int access_valid(u32 x
)
1250 return (x
> 0 && x
< 4);
1253 static int deny_valid(u32 x
)
1255 return (x
>= 0 && x
< 5);
1259 set_access(unsigned int *access
, unsigned long bmap
) {
1263 for (i
= 1; i
< 4; i
++) {
1264 if (test_bit(i
, &bmap
))
1270 set_deny(unsigned int *deny
, unsigned long bmap
) {
1274 for (i
= 0; i
< 4; i
++) {
1275 if (test_bit(i
, &bmap
))
1281 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1282 unsigned int access
, deny
;
1284 set_access(&access
, stp
->st_access_bmap
);
1285 set_deny(&deny
, stp
->st_deny_bmap
);
1286 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1292 * Called to check deny when READ with all zero stateid or
1293 * WRITE with all zero or all one stateid
1296 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1298 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1299 struct nfs4_file
*fp
;
1300 struct nfs4_stateid
*stp
;
1303 dprintk("NFSD: nfs4_share_conflict\n");
1305 fp
= find_file(ino
);
1308 ret
= nfserr_locked
;
1309 /* Search for conflicting share reservations */
1310 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1311 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1312 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1322 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1324 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1325 put_write_access(filp
->f_path
.dentry
->d_inode
);
1326 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1331 * Recall a delegation
1334 do_recall(void *__dp
)
1336 struct nfs4_delegation
*dp
= __dp
;
1338 dp
->dl_file
->fi_had_conflict
= true;
1339 nfsd4_cb_recall(dp
);
1344 * Spawn a thread to perform a recall on the delegation represented
1345 * by the lease (file_lock)
1347 * Called from break_lease() with lock_kernel() held.
1348 * Note: we assume break_lease will only call this *once* for any given
1352 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1354 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1355 struct task_struct
*t
;
1357 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1361 /* We're assuming the state code never drops its reference
1362 * without first removing the lease. Since we're in this lease
1363 * callback (and since the lease code is serialized by the kernel
1364 * lock) we know the server hasn't removed the lease yet, we know
1365 * it's safe to take a reference: */
1366 atomic_inc(&dp
->dl_count
);
1368 spin_lock(&recall_lock
);
1369 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
1370 spin_unlock(&recall_lock
);
1372 /* only place dl_time is set. protected by lock_kernel*/
1373 dp
->dl_time
= get_seconds();
1375 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1376 fl
->fl_break_time
= jiffies
+ NFSD_LEASE_TIME
* HZ
;
1378 t
= kthread_run(do_recall
, dp
, "%s", "nfs4_cb_recall");
1380 struct nfs4_client
*clp
= dp
->dl_client
;
1382 printk(KERN_INFO
"NFSD: Callback thread failed for "
1383 "for client (clientid %08x/%08x)\n",
1384 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1385 nfs4_put_delegation(dp
);
1390 * The file_lock is being reapd.
1392 * Called by locks_free_lock() with lock_kernel() held.
1395 void nfsd_release_deleg_cb(struct file_lock
*fl
)
1397 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1399 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
1401 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
1403 dp
->dl_flock
= NULL
;
1407 * Set the delegation file_lock back pointer.
1409 * Called from setlease() with lock_kernel() held.
1412 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
1414 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
1416 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
1423 * Called from setlease() with lock_kernel() held
1426 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
1428 struct nfs4_delegation
*onlistd
=
1429 (struct nfs4_delegation
*)onlist
->fl_owner
;
1430 struct nfs4_delegation
*tryd
=
1431 (struct nfs4_delegation
*)try->fl_owner
;
1433 if (onlist
->fl_lmops
!= try->fl_lmops
)
1436 return onlistd
->dl_client
== tryd
->dl_client
;
1441 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
1444 return lease_modify(onlist
, arg
);
1449 static struct lock_manager_operations nfsd_lease_mng_ops
= {
1450 .fl_break
= nfsd_break_deleg_cb
,
1451 .fl_release_private
= nfsd_release_deleg_cb
,
1452 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
1453 .fl_mylease
= nfsd_same_client_deleg_cb
,
1454 .fl_change
= nfsd_change_deleg_cb
,
1459 nfsd4_process_open1(struct nfsd4_open
*open
)
1461 clientid_t
*clientid
= &open
->op_clientid
;
1462 struct nfs4_client
*clp
= NULL
;
1463 unsigned int strhashval
;
1464 struct nfs4_stateowner
*sop
= NULL
;
1466 if (!check_name(open
->op_owner
))
1467 return nfserr_inval
;
1469 if (STALE_CLIENTID(&open
->op_clientid
))
1470 return nfserr_stale_clientid
;
1472 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1473 sop
= find_openstateowner_str(strhashval
, open
);
1474 open
->op_stateowner
= sop
;
1476 /* Make sure the client's lease hasn't expired. */
1477 clp
= find_confirmed_client(clientid
);
1479 return nfserr_expired
;
1482 if (!sop
->so_confirmed
) {
1483 /* Replace unconfirmed owners without checking for replay. */
1484 clp
= sop
->so_client
;
1485 release_stateowner(sop
);
1486 open
->op_stateowner
= NULL
;
1489 if (open
->op_seqid
== sop
->so_seqid
- 1) {
1490 if (sop
->so_replay
.rp_buflen
)
1491 return nfserr_replay_me
;
1492 /* The original OPEN failed so spectacularly
1493 * that we don't even have replay data saved!
1494 * Therefore, we have no choice but to continue
1495 * processing this OPEN; presumably, we'll
1496 * fail again for the same reason.
1498 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1501 if (open
->op_seqid
!= sop
->so_seqid
)
1502 return nfserr_bad_seqid
;
1504 if (open
->op_stateowner
== NULL
) {
1505 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1507 return nfserr_resource
;
1508 open
->op_stateowner
= sop
;
1510 list_del_init(&sop
->so_close_lru
);
1511 renew_client(sop
->so_client
);
1515 static inline __be32
1516 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1518 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1519 return nfserr_openmode
;
1524 static struct nfs4_delegation
*
1525 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1527 struct nfs4_delegation
*dp
;
1529 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1530 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1537 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1538 struct nfs4_delegation
**dp
)
1541 __be32 status
= nfserr_bad_stateid
;
1543 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1546 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1547 RD_STATE
: WR_STATE
;
1548 status
= nfs4_check_delegmode(*dp
, flags
);
1552 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1556 open
->op_stateowner
->so_confirmed
= 1;
1561 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1563 struct nfs4_stateid
*local
;
1564 __be32 status
= nfserr_share_denied
;
1565 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1567 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1568 /* ignore lock owners */
1569 if (local
->st_stateowner
->so_is_open_owner
== 0)
1571 /* remember if we have seen this open owner */
1572 if (local
->st_stateowner
== sop
)
1574 /* check for conflicting share reservations */
1575 if (!test_share(local
, open
))
1583 static inline struct nfs4_stateid
*
1584 nfs4_alloc_stateid(void)
1586 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1590 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1591 struct nfs4_delegation
*dp
,
1592 struct svc_fh
*cur_fh
, int flags
)
1594 struct nfs4_stateid
*stp
;
1596 stp
= nfs4_alloc_stateid();
1598 return nfserr_resource
;
1601 get_file(dp
->dl_vfs_file
);
1602 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1605 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1608 if (status
== nfserr_dropit
)
1609 status
= nfserr_jukebox
;
1610 kmem_cache_free(stateid_slab
, stp
);
1618 static inline __be32
1619 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1620 struct nfsd4_open
*open
)
1622 struct iattr iattr
= {
1623 .ia_valid
= ATTR_SIZE
,
1626 if (!open
->op_truncate
)
1628 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1629 return nfserr_inval
;
1630 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1634 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1636 struct file
*filp
= stp
->st_vfs_file
;
1637 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1638 unsigned int share_access
, new_writer
;
1641 set_access(&share_access
, stp
->st_access_bmap
);
1642 new_writer
= (~share_access
) & open
->op_share_access
1643 & NFS4_SHARE_ACCESS_WRITE
;
1646 int err
= get_write_access(inode
);
1648 return nfserrno(err
);
1650 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1653 put_write_access(inode
);
1656 /* remember the open */
1657 filp
->f_mode
|= open
->op_share_access
;
1658 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1659 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1666 nfs4_set_claim_prev(struct nfsd4_open
*open
)
1668 open
->op_stateowner
->so_confirmed
= 1;
1669 open
->op_stateowner
->so_client
->cl_firststate
= 1;
1673 * Attempt to hand out a delegation.
1676 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1678 struct nfs4_delegation
*dp
;
1679 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1680 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1681 struct file_lock fl
, *flp
= &fl
;
1682 int status
, flag
= 0;
1684 flag
= NFS4_OPEN_DELEGATE_NONE
;
1685 open
->op_recall
= 0;
1686 switch (open
->op_claim_type
) {
1687 case NFS4_OPEN_CLAIM_PREVIOUS
:
1688 if (!atomic_read(&cb
->cb_set
))
1689 open
->op_recall
= 1;
1690 flag
= open
->op_delegate_type
;
1691 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1694 case NFS4_OPEN_CLAIM_NULL
:
1695 /* Let's not give out any delegations till everyone's
1696 * had the chance to reclaim theirs.... */
1697 if (nfs4_in_grace())
1699 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1701 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1702 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1704 flag
= NFS4_OPEN_DELEGATE_READ
;
1710 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1712 flag
= NFS4_OPEN_DELEGATE_NONE
;
1715 locks_init_lock(&fl
);
1716 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1717 fl
.fl_flags
= FL_LEASE
;
1718 fl
.fl_end
= OFFSET_MAX
;
1719 fl
.fl_owner
= (fl_owner_t
)dp
;
1720 fl
.fl_file
= stp
->st_vfs_file
;
1721 fl
.fl_pid
= current
->tgid
;
1723 /* vfs_setlease checks to see if delegation should be handed out.
1724 * the lock_manager callbacks fl_mylease and fl_change are used
1726 if ((status
= vfs_setlease(stp
->st_vfs_file
,
1727 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1728 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1729 unhash_delegation(dp
);
1730 flag
= NFS4_OPEN_DELEGATE_NONE
;
1734 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1736 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1737 dp
->dl_stateid
.si_boot
,
1738 dp
->dl_stateid
.si_stateownerid
,
1739 dp
->dl_stateid
.si_fileid
,
1740 dp
->dl_stateid
.si_generation
);
1742 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1743 && flag
== NFS4_OPEN_DELEGATE_NONE
1744 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1745 printk("NFSD: WARNING: refusing delegation reclaim\n");
1746 open
->op_delegate_type
= flag
;
1750 * called with nfs4_lock_state() held.
1753 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1755 struct nfs4_file
*fp
= NULL
;
1756 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1757 struct nfs4_stateid
*stp
= NULL
;
1758 struct nfs4_delegation
*dp
= NULL
;
1761 status
= nfserr_inval
;
1762 if (!access_valid(open
->op_share_access
)
1763 || !deny_valid(open
->op_share_deny
))
1766 * Lookup file; if found, lookup stateid and check open request,
1767 * and check for delegations in the process of being recalled.
1768 * If not found, create the nfs4_file struct
1770 fp
= find_file(ino
);
1772 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1774 status
= nfs4_check_deleg(fp
, open
, &dp
);
1778 status
= nfserr_bad_stateid
;
1779 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1781 status
= nfserr_resource
;
1782 fp
= alloc_init_file(ino
);
1788 * OPEN the file, or upgrade an existing OPEN.
1789 * If truncate fails, the OPEN fails.
1792 /* Stateid was found, this is an OPEN upgrade */
1793 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1796 update_stateid(&stp
->st_stateid
);
1798 /* Stateid was not found, this is a new OPEN */
1800 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
1802 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1804 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1807 init_stateid(stp
, fp
, open
);
1808 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1810 release_stateid(stp
, OPEN_STATE
);
1814 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1817 * Attempt to hand out a delegation. No error return, because the
1818 * OPEN succeeds even if we fail.
1820 nfs4_open_delegation(current_fh
, open
, stp
);
1824 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1825 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1826 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1830 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1831 nfs4_set_claim_prev(open
);
1833 * To finish the open response, we just need to set the rflags.
1835 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1836 if (!open
->op_stateowner
->so_confirmed
)
1837 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1842 static struct workqueue_struct
*laundry_wq
;
1843 static void laundromat_main(struct work_struct
*);
1844 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
1847 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1850 struct nfs4_client
*clp
;
1854 dprintk("process_renew(%08x/%08x): starting\n",
1855 clid
->cl_boot
, clid
->cl_id
);
1856 status
= nfserr_stale_clientid
;
1857 if (STALE_CLIENTID(clid
))
1859 clp
= find_confirmed_client(clid
);
1860 status
= nfserr_expired
;
1862 /* We assume the client took too long to RENEW. */
1863 dprintk("nfsd4_renew: clientid not found!\n");
1867 status
= nfserr_cb_path_down
;
1868 if (!list_empty(&clp
->cl_delegations
)
1869 && !atomic_read(&clp
->cl_callback
.cb_set
))
1873 nfs4_unlock_state();
1880 dprintk("NFSD: end of grace period\n");
1881 nfsd4_recdir_purge_old();
1886 nfs4_laundromat(void)
1888 struct nfs4_client
*clp
;
1889 struct nfs4_stateowner
*sop
;
1890 struct nfs4_delegation
*dp
;
1891 struct list_head
*pos
, *next
, reaplist
;
1892 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1893 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1894 time_t u
, test_val
= NFSD_LEASE_TIME
;
1898 dprintk("NFSD: laundromat service - starting\n");
1901 list_for_each_safe(pos
, next
, &client_lru
) {
1902 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1903 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1904 t
= clp
->cl_time
- cutoff
;
1905 if (clientid_val
> t
)
1909 dprintk("NFSD: purging unused client (clientid %08x)\n",
1910 clp
->cl_clientid
.cl_id
);
1911 nfsd4_remove_clid_dir(clp
);
1914 INIT_LIST_HEAD(&reaplist
);
1915 spin_lock(&recall_lock
);
1916 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1917 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1918 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1919 u
= dp
->dl_time
- cutoff
;
1924 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1926 list_move(&dp
->dl_recall_lru
, &reaplist
);
1928 spin_unlock(&recall_lock
);
1929 list_for_each_safe(pos
, next
, &reaplist
) {
1930 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1931 list_del_init(&dp
->dl_recall_lru
);
1932 unhash_delegation(dp
);
1934 test_val
= NFSD_LEASE_TIME
;
1935 list_for_each_safe(pos
, next
, &close_lru
) {
1936 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1937 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1938 u
= sop
->so_time
- cutoff
;
1943 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1945 release_stateowner(sop
);
1947 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1948 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1949 nfs4_unlock_state();
1950 return clientid_val
;
1954 laundromat_main(struct work_struct
*not_used
)
1958 t
= nfs4_laundromat();
1959 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1960 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1963 static struct nfs4_stateowner
*
1964 search_close_lru(u32 st_id
, int flags
)
1966 struct nfs4_stateowner
*local
= NULL
;
1968 if (flags
& CLOSE_STATE
) {
1969 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1970 if (local
->so_id
== st_id
)
1978 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1980 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
1984 STALE_STATEID(stateid_t
*stateid
)
1986 if (stateid
->si_boot
== boot_time
)
1988 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1989 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1990 stateid
->si_generation
);
1995 access_permit_read(unsigned long access_bmap
)
1997 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1998 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1999 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2003 access_permit_write(unsigned long access_bmap
)
2005 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2006 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2010 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2012 __be32 status
= nfserr_openmode
;
2014 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2016 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2023 static inline __be32
2024 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2026 /* Trying to call delegreturn with a special stateid? Yuch: */
2027 if (!(flags
& (RD_STATE
| WR_STATE
)))
2028 return nfserr_bad_stateid
;
2029 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2031 else if (nfs4_in_grace()) {
2032 /* Answer in remaining cases depends on existance of
2033 * conflicting state; so we must wait out the grace period. */
2034 return nfserr_grace
;
2035 } else if (flags
& WR_STATE
)
2036 return nfs4_share_conflict(current_fh
,
2037 NFS4_SHARE_DENY_WRITE
);
2038 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2039 return nfs4_share_conflict(current_fh
,
2040 NFS4_SHARE_DENY_READ
);
2044 * Allow READ/WRITE during grace period on recovered state only for files
2045 * that are not able to provide mandatory locking.
2048 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2050 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2051 && MANDATORY_LOCK(inode
);
2055 * Checks for stateid operations
2058 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2060 struct nfs4_stateid
*stp
= NULL
;
2061 struct nfs4_delegation
*dp
= NULL
;
2063 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2066 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2067 stateid
->si_boot
, stateid
->si_stateownerid
,
2068 stateid
->si_fileid
, stateid
->si_generation
);
2072 if (io_during_grace_disallowed(ino
, flags
))
2073 return nfserr_grace
;
2075 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2076 return check_special_stateids(current_fh
, stateid
, flags
);
2079 status
= nfserr_stale_stateid
;
2080 if (STALE_STATEID(stateid
))
2084 status
= nfserr_bad_stateid
;
2085 if (!stateid
->si_fileid
) { /* delegation stateid */
2086 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2087 dprintk("NFSD: delegation stateid not found\n");
2090 stidp
= &dp
->dl_stateid
;
2091 } else { /* open or lock stateid */
2092 if (!(stp
= find_stateid(stateid
, flags
))) {
2093 dprintk("NFSD: open or lock stateid not found\n");
2096 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2098 if (!stp
->st_stateowner
->so_confirmed
)
2100 stidp
= &stp
->st_stateid
;
2102 if (stateid
->si_generation
> stidp
->si_generation
)
2106 status
= nfserr_old_stateid
;
2107 if (stateid
->si_generation
< stidp
->si_generation
)
2110 if ((status
= nfs4_check_openmode(stp
,flags
)))
2112 renew_client(stp
->st_stateowner
->so_client
);
2114 *filpp
= stp
->st_vfs_file
;
2116 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2118 renew_client(dp
->dl_client
);
2119 if (flags
& DELEG_RET
)
2120 unhash_delegation(dp
);
2122 *filpp
= dp
->dl_vfs_file
;
2132 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2133 RD_STATE
: WR_STATE
;
2137 * Checks for sequence id mutating operations.
2140 nfs4_preprocess_seqid_op(struct svc_fh
*current_fh
, u32 seqid
, stateid_t
*stateid
, int flags
, struct nfs4_stateowner
**sopp
, struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
2142 struct nfs4_stateid
*stp
;
2143 struct nfs4_stateowner
*sop
;
2145 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2146 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2147 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2148 stateid
->si_generation
);
2153 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2154 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2155 return nfserr_bad_stateid
;
2158 if (STALE_STATEID(stateid
))
2159 return nfserr_stale_stateid
;
2161 * We return BAD_STATEID if filehandle doesn't match stateid,
2162 * the confirmed flag is incorrecly set, or the generation
2163 * number is incorrect.
2165 stp
= find_stateid(stateid
, flags
);
2168 * Also, we should make sure this isn't just the result of
2171 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2173 return nfserr_bad_stateid
;
2179 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2180 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2181 struct nfs4_client
*clp
= sop
->so_client
;
2185 lkflg
= setlkflg(lock
->lk_type
);
2187 if (lock
->lk_is_new
) {
2188 if (!sop
->so_is_open_owner
)
2189 return nfserr_bad_stateid
;
2190 if (!same_clid(&clp
->cl_clientid
, lockclid
))
2191 return nfserr_bad_stateid
;
2192 /* stp is the open stateid */
2193 status
= nfs4_check_openmode(stp
, lkflg
);
2197 /* stp is the lock stateid */
2198 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2204 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2205 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2206 return nfserr_bad_stateid
;
2210 *sopp
= sop
= stp
->st_stateowner
;
2213 * We now validate the seqid and stateid generation numbers.
2214 * For the moment, we ignore the possibility of
2215 * generation number wraparound.
2217 if (seqid
!= sop
->so_seqid
)
2220 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2221 printk("NFSD: preprocess_seqid_op: expected"
2222 " unconfirmed stateowner!\n");
2223 return nfserr_bad_stateid
;
2225 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2226 printk("NFSD: preprocess_seqid_op: stateowner not"
2227 " confirmed yet!\n");
2228 return nfserr_bad_stateid
;
2230 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2231 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2232 return nfserr_bad_stateid
;
2235 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2236 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2237 return nfserr_old_stateid
;
2239 renew_client(sop
->so_client
);
2243 if (seqid
== sop
->so_seqid
- 1) {
2244 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2245 /* indicate replay to calling function */
2246 return nfserr_replay_me
;
2248 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2249 sop
->so_seqid
, seqid
);
2251 return nfserr_bad_seqid
;
2255 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2256 struct nfsd4_open_confirm
*oc
)
2259 struct nfs4_stateowner
*sop
;
2260 struct nfs4_stateid
*stp
;
2262 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2263 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2264 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2266 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
2272 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2273 oc
->oc_seqid
, &oc
->oc_req_stateid
,
2274 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2275 &oc
->oc_stateowner
, &stp
, NULL
)))
2278 sop
= oc
->oc_stateowner
;
2279 sop
->so_confirmed
= 1;
2280 update_stateid(&stp
->st_stateid
);
2281 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2282 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2283 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2284 stp
->st_stateid
.si_boot
,
2285 stp
->st_stateid
.si_stateownerid
,
2286 stp
->st_stateid
.si_fileid
,
2287 stp
->st_stateid
.si_generation
);
2289 nfsd4_create_clid_dir(sop
->so_client
);
2291 if (oc
->oc_stateowner
) {
2292 nfs4_get_stateowner(oc
->oc_stateowner
);
2293 cstate
->replay_owner
= oc
->oc_stateowner
;
2295 nfs4_unlock_state();
2301 * unset all bits in union bitmap (bmap) that
2302 * do not exist in share (from successful OPEN_DOWNGRADE)
2305 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2308 for (i
= 1; i
< 4; i
++) {
2309 if ((i
& access
) != i
)
2310 __clear_bit(i
, bmap
);
2315 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2318 for (i
= 0; i
< 4; i
++) {
2319 if ((i
& deny
) != i
)
2320 __clear_bit(i
, bmap
);
2325 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
2326 struct nfsd4_compound_state
*cstate
,
2327 struct nfsd4_open_downgrade
*od
)
2330 struct nfs4_stateid
*stp
;
2331 unsigned int share_access
;
2333 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2334 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2335 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2337 if (!access_valid(od
->od_share_access
)
2338 || !deny_valid(od
->od_share_deny
))
2339 return nfserr_inval
;
2342 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2345 CHECK_FH
| OPEN_STATE
,
2346 &od
->od_stateowner
, &stp
, NULL
)))
2349 status
= nfserr_inval
;
2350 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2351 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2352 stp
->st_access_bmap
, od
->od_share_access
);
2355 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2356 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2357 stp
->st_deny_bmap
, od
->od_share_deny
);
2360 set_access(&share_access
, stp
->st_access_bmap
);
2361 nfs4_file_downgrade(stp
->st_vfs_file
,
2362 share_access
& ~od
->od_share_access
);
2364 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2365 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2367 update_stateid(&stp
->st_stateid
);
2368 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2371 if (od
->od_stateowner
) {
2372 nfs4_get_stateowner(od
->od_stateowner
);
2373 cstate
->replay_owner
= od
->od_stateowner
;
2375 nfs4_unlock_state();
2380 * nfs4_unlock_state() called after encode
2383 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2384 struct nfsd4_close
*close
)
2387 struct nfs4_stateid
*stp
;
2389 dprintk("NFSD: nfsd4_close on file %.*s\n",
2390 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2391 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2394 /* check close_lru for replay */
2395 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2398 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2399 &close
->cl_stateowner
, &stp
, NULL
)))
2402 update_stateid(&stp
->st_stateid
);
2403 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2405 /* release_stateid() calls nfsd_close() if needed */
2406 release_stateid(stp
, OPEN_STATE
);
2408 /* place unused nfs4_stateowners on so_close_lru list to be
2409 * released by the laundromat service after the lease period
2410 * to enable us to handle CLOSE replay
2412 if (list_empty(&close
->cl_stateowner
->so_stateids
))
2413 move_to_close_lru(close
->cl_stateowner
);
2415 if (close
->cl_stateowner
) {
2416 nfs4_get_stateowner(close
->cl_stateowner
);
2417 cstate
->replay_owner
= close
->cl_stateowner
;
2419 nfs4_unlock_state();
2424 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2425 struct nfsd4_delegreturn
*dr
)
2429 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
2433 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
2434 &dr
->dr_stateid
, DELEG_RET
, NULL
);
2435 nfs4_unlock_state();
2442 * Lock owner state (byte-range locks)
2444 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2445 #define LOCK_HASH_BITS 8
2446 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2447 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2449 #define lockownerid_hashval(id) \
2450 ((id) & LOCK_HASH_MASK)
2452 static inline unsigned int
2453 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2454 struct xdr_netobj
*ownername
)
2456 return (file_hashval(inode
) + cl_id
2457 + opaque_hashval(ownername
->data
, ownername
->len
))
2461 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2462 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2463 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2465 static struct nfs4_stateid
*
2466 find_stateid(stateid_t
*stid
, int flags
)
2468 struct nfs4_stateid
*local
= NULL
;
2469 u32 st_id
= stid
->si_stateownerid
;
2470 u32 f_id
= stid
->si_fileid
;
2471 unsigned int hashval
;
2473 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2474 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2475 hashval
= stateid_hashval(st_id
, f_id
);
2476 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2477 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2478 (local
->st_stateid
.si_fileid
== f_id
))
2482 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2483 hashval
= stateid_hashval(st_id
, f_id
);
2484 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2485 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2486 (local
->st_stateid
.si_fileid
== f_id
))
2493 static struct nfs4_delegation
*
2494 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2496 struct nfs4_file
*fp
;
2497 struct nfs4_delegation
*dl
;
2499 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2500 stid
->si_boot
, stid
->si_stateownerid
,
2501 stid
->si_fileid
, stid
->si_generation
);
2503 fp
= find_file(ino
);
2506 dl
= find_delegation_file(fp
, stid
);
2512 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2513 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2514 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2515 * locking, this prevents us from being completely protocol-compliant. The
2516 * real solution to this problem is to start using unsigned file offsets in
2517 * the VFS, but this is a very deep change!
2520 nfs4_transform_lock_offset(struct file_lock
*lock
)
2522 if (lock
->fl_start
< 0)
2523 lock
->fl_start
= OFFSET_MAX
;
2524 if (lock
->fl_end
< 0)
2525 lock
->fl_end
= OFFSET_MAX
;
2528 /* Hack!: For now, we're defining this just so we can use a pointer to it
2529 * as a unique cookie to identify our (NFSv4's) posix locks. */
2530 static struct lock_manager_operations nfsd_posix_mng_ops
= {
2534 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2536 struct nfs4_stateowner
*sop
;
2539 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
2540 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2541 hval
= lockownerid_hashval(sop
->so_id
);
2542 kref_get(&sop
->so_ref
);
2544 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2546 deny
->ld_sop
= NULL
;
2547 deny
->ld_clientid
.cl_boot
= 0;
2548 deny
->ld_clientid
.cl_id
= 0;
2550 deny
->ld_start
= fl
->fl_start
;
2551 deny
->ld_length
= ~(u64
)0;
2552 if (fl
->fl_end
!= ~(u64
)0)
2553 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2554 deny
->ld_type
= NFS4_READ_LT
;
2555 if (fl
->fl_type
!= F_RDLCK
)
2556 deny
->ld_type
= NFS4_WRITE_LT
;
2559 static struct nfs4_stateowner
*
2560 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2561 struct xdr_netobj
*owner
)
2563 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2564 struct nfs4_stateowner
*op
;
2566 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2567 if (same_owner_str(op
, owner
, clid
))
2574 * Alloc a lock owner structure.
2575 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2578 * strhashval = lock_ownerstr_hashval
2581 static struct nfs4_stateowner
*
2582 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2583 struct nfs4_stateowner
*sop
;
2584 struct nfs4_replay
*rp
;
2585 unsigned int idhashval
;
2587 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2589 idhashval
= lockownerid_hashval(current_ownerid
);
2590 INIT_LIST_HEAD(&sop
->so_idhash
);
2591 INIT_LIST_HEAD(&sop
->so_strhash
);
2592 INIT_LIST_HEAD(&sop
->so_perclient
);
2593 INIT_LIST_HEAD(&sop
->so_stateids
);
2594 INIT_LIST_HEAD(&sop
->so_perstateid
);
2595 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2597 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2598 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2599 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2600 sop
->so_is_open_owner
= 0;
2601 sop
->so_id
= current_ownerid
++;
2602 sop
->so_client
= clp
;
2603 /* It is the openowner seqid that will be incremented in encode in the
2604 * case of new lockowners; so increment the lock seqid manually: */
2605 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
2606 sop
->so_confirmed
= 1;
2607 rp
= &sop
->so_replay
;
2608 rp
->rp_status
= nfserr_serverfault
;
2610 rp
->rp_buf
= rp
->rp_ibuf
;
2614 static struct nfs4_stateid
*
2615 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2617 struct nfs4_stateid
*stp
;
2618 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2620 stp
= nfs4_alloc_stateid();
2623 INIT_LIST_HEAD(&stp
->st_hash
);
2624 INIT_LIST_HEAD(&stp
->st_perfile
);
2625 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2626 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2627 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2628 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2629 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2630 stp
->st_stateowner
= sop
;
2633 stp
->st_stateid
.si_boot
= boot_time
;
2634 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2635 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2636 stp
->st_stateid
.si_generation
= 0;
2637 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2638 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2639 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2640 stp
->st_openstp
= open_stp
;
2647 check_lock_length(u64 offset
, u64 length
)
2649 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2650 LOFF_OVERFLOW(offset
, length
)));
2657 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2658 struct nfsd4_lock
*lock
)
2660 struct nfs4_stateowner
*open_sop
= NULL
;
2661 struct nfs4_stateowner
*lock_sop
= NULL
;
2662 struct nfs4_stateid
*lock_stp
;
2664 struct file_lock file_lock
;
2665 struct file_lock conflock
;
2667 unsigned int strhashval
;
2671 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2672 (long long) lock
->lk_offset
,
2673 (long long) lock
->lk_length
);
2675 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2676 return nfserr_inval
;
2678 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
2679 S_IFREG
, MAY_LOCK
))) {
2680 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2686 if (lock
->lk_is_new
) {
2688 * Client indicates that this is a new lockowner.
2689 * Use open owner and open stateid to create lock owner and
2692 struct nfs4_stateid
*open_stp
= NULL
;
2693 struct nfs4_file
*fp
;
2695 status
= nfserr_stale_clientid
;
2696 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
2699 /* validate and update open stateid and open seqid */
2700 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2701 lock
->lk_new_open_seqid
,
2702 &lock
->lk_new_open_stateid
,
2703 CHECK_FH
| OPEN_STATE
,
2704 &lock
->lk_replay_owner
, &open_stp
,
2708 open_sop
= lock
->lk_replay_owner
;
2709 /* create lockowner and lock stateid */
2710 fp
= open_stp
->st_file
;
2711 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2712 open_sop
->so_client
->cl_clientid
.cl_id
,
2713 &lock
->v
.new.owner
);
2714 /* XXX: Do we need to check for duplicate stateowners on
2715 * the same file, or should they just be allowed (and
2716 * create new stateids)? */
2717 status
= nfserr_resource
;
2718 lock_sop
= alloc_init_lock_stateowner(strhashval
,
2719 open_sop
->so_client
, open_stp
, lock
);
2720 if (lock_sop
== NULL
)
2722 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
2723 if (lock_stp
== NULL
)
2726 /* lock (lock owner + lock stateid) already exists */
2727 status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2728 lock
->lk_old_lock_seqid
,
2729 &lock
->lk_old_lock_stateid
,
2730 CHECK_FH
| LOCK_STATE
,
2731 &lock
->lk_replay_owner
, &lock_stp
, lock
);
2734 lock_sop
= lock
->lk_replay_owner
;
2736 /* lock->lk_replay_owner and lock_stp have been created or found */
2737 filp
= lock_stp
->st_vfs_file
;
2739 status
= nfserr_grace
;
2740 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2742 status
= nfserr_no_grace
;
2743 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2746 locks_init_lock(&file_lock
);
2747 switch (lock
->lk_type
) {
2750 file_lock
.fl_type
= F_RDLCK
;
2754 case NFS4_WRITEW_LT
:
2755 file_lock
.fl_type
= F_WRLCK
;
2759 status
= nfserr_inval
;
2762 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
2763 file_lock
.fl_pid
= current
->tgid
;
2764 file_lock
.fl_file
= filp
;
2765 file_lock
.fl_flags
= FL_POSIX
;
2766 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2768 file_lock
.fl_start
= lock
->lk_offset
;
2769 if ((lock
->lk_length
== ~(u64
)0) ||
2770 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2771 file_lock
.fl_end
= ~(u64
)0;
2773 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2774 nfs4_transform_lock_offset(&file_lock
);
2777 * Try to lock the file in the VFS.
2778 * Note: locks.c uses the BKL to protect the inode's lock list.
2781 /* XXX?: Just to divert the locks_release_private at the start of
2782 * locks_copy_lock: */
2783 locks_init_lock(&conflock
);
2784 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
2786 case 0: /* success! */
2787 update_stateid(&lock_stp
->st_stateid
);
2788 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2792 case (EAGAIN
): /* conflock holds conflicting lock */
2793 status
= nfserr_denied
;
2794 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2795 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
2798 status
= nfserr_deadlock
;
2801 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
2802 status
= nfserr_resource
;
2806 if (status
&& lock
->lk_is_new
&& lock_sop
)
2807 release_stateowner(lock_sop
);
2808 if (lock
->lk_replay_owner
) {
2809 nfs4_get_stateowner(lock
->lk_replay_owner
);
2810 cstate
->replay_owner
= lock
->lk_replay_owner
;
2812 nfs4_unlock_state();
2820 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2821 struct nfsd4_lockt
*lockt
)
2823 struct inode
*inode
;
2825 struct file_lock file_lock
;
2829 if (nfs4_in_grace())
2830 return nfserr_grace
;
2832 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2833 return nfserr_inval
;
2835 lockt
->lt_stateowner
= NULL
;
2838 status
= nfserr_stale_clientid
;
2839 if (STALE_CLIENTID(&lockt
->lt_clientid
))
2842 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
2843 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2844 if (status
== nfserr_symlink
)
2845 status
= nfserr_inval
;
2849 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
2850 locks_init_lock(&file_lock
);
2851 switch (lockt
->lt_type
) {
2854 file_lock
.fl_type
= F_RDLCK
;
2857 case NFS4_WRITEW_LT
:
2858 file_lock
.fl_type
= F_WRLCK
;
2861 printk("NFSD: nfs4_lockt: bad lock type!\n");
2862 status
= nfserr_inval
;
2866 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2867 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2868 if (lockt
->lt_stateowner
)
2869 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2870 file_lock
.fl_pid
= current
->tgid
;
2871 file_lock
.fl_flags
= FL_POSIX
;
2872 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2874 file_lock
.fl_start
= lockt
->lt_offset
;
2875 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2876 file_lock
.fl_end
= ~(u64
)0;
2878 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2880 nfs4_transform_lock_offset(&file_lock
);
2882 /* vfs_test_lock uses the struct file _only_ to resolve the inode.
2883 * since LOCKT doesn't require an OPEN, and therefore a struct
2884 * file may not exist, pass vfs_test_lock a struct file with
2885 * only the dentry:inode set.
2887 memset(&file
, 0, sizeof (struct file
));
2888 file
.f_path
.dentry
= cstate
->current_fh
.fh_dentry
;
2891 error
= vfs_test_lock(&file
, &file_lock
);
2893 status
= nfserrno(error
);
2896 if (file_lock
.fl_type
!= F_UNLCK
) {
2897 status
= nfserr_denied
;
2898 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
2901 nfs4_unlock_state();
2906 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2907 struct nfsd4_locku
*locku
)
2909 struct nfs4_stateid
*stp
;
2910 struct file
*filp
= NULL
;
2911 struct file_lock file_lock
;
2915 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2916 (long long) locku
->lu_offset
,
2917 (long long) locku
->lu_length
);
2919 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2920 return nfserr_inval
;
2924 if ((status
= nfs4_preprocess_seqid_op(&cstate
->current_fh
,
2927 CHECK_FH
| LOCK_STATE
,
2928 &locku
->lu_stateowner
, &stp
, NULL
)))
2931 filp
= stp
->st_vfs_file
;
2933 locks_init_lock(&file_lock
);
2934 file_lock
.fl_type
= F_UNLCK
;
2935 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2936 file_lock
.fl_pid
= current
->tgid
;
2937 file_lock
.fl_file
= filp
;
2938 file_lock
.fl_flags
= FL_POSIX
;
2939 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2940 file_lock
.fl_start
= locku
->lu_offset
;
2942 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2943 file_lock
.fl_end
= ~(u64
)0;
2945 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2946 nfs4_transform_lock_offset(&file_lock
);
2949 * Try to unlock the file in the VFS.
2951 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
2953 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
2957 * OK, unlock succeeded; the only thing left to do is update the stateid.
2959 update_stateid(&stp
->st_stateid
);
2960 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2963 if (locku
->lu_stateowner
) {
2964 nfs4_get_stateowner(locku
->lu_stateowner
);
2965 cstate
->replay_owner
= locku
->lu_stateowner
;
2967 nfs4_unlock_state();
2971 status
= nfserrno(err
);
2977 * 1: locks held by lockowner
2978 * 0: no locks held by lockowner
2981 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
2983 struct file_lock
**flpp
;
2984 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2988 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
2989 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
3000 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
3001 struct nfsd4_compound_state
*cstate
,
3002 struct nfsd4_release_lockowner
*rlockowner
)
3004 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3005 struct nfs4_stateowner
*sop
;
3006 struct nfs4_stateid
*stp
;
3007 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3008 struct list_head matches
;
3012 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3013 clid
->cl_boot
, clid
->cl_id
);
3015 /* XXX check for lease expiration */
3017 status
= nfserr_stale_clientid
;
3018 if (STALE_CLIENTID(clid
))
3023 status
= nfserr_locks_held
;
3024 /* XXX: we're doing a linear search through all the lockowners.
3025 * Yipes! For now we'll just hope clients aren't really using
3026 * release_lockowner much, but eventually we have to fix these
3027 * data structures. */
3028 INIT_LIST_HEAD(&matches
);
3029 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3030 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
3031 if (!same_owner_str(sop
, owner
, clid
))
3033 list_for_each_entry(stp
, &sop
->so_stateids
,
3035 if (check_for_locks(stp
->st_vfs_file
, sop
))
3037 /* Note: so_perclient unused for lockowners,
3038 * so it's OK to fool with here. */
3039 list_add(&sop
->so_perclient
, &matches
);
3043 /* Clients probably won't expect us to return with some (but not all)
3044 * of the lockowner state released; so don't release any until all
3045 * have been checked. */
3047 while (!list_empty(&matches
)) {
3048 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
3050 /* unhash_stateowner deletes so_perclient only
3051 * for openowners. */
3052 list_del(&sop
->so_perclient
);
3053 release_stateowner(sop
);
3056 nfs4_unlock_state();
3060 static inline struct nfs4_client_reclaim
*
3063 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3067 nfs4_has_reclaimed_state(const char *name
)
3069 unsigned int strhashval
= clientstr_hashval(name
);
3070 struct nfs4_client
*clp
;
3072 clp
= find_confirmed_client_by_str(name
, strhashval
);
3077 * failure => all reset bets are off, nfserr_no_grace...
3080 nfs4_client_to_reclaim(const char *name
)
3082 unsigned int strhashval
;
3083 struct nfs4_client_reclaim
*crp
= NULL
;
3085 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3086 crp
= alloc_reclaim();
3089 strhashval
= clientstr_hashval(name
);
3090 INIT_LIST_HEAD(&crp
->cr_strhash
);
3091 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3092 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3093 reclaim_str_hashtbl_size
++;
3098 nfs4_release_reclaim(void)
3100 struct nfs4_client_reclaim
*crp
= NULL
;
3103 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3104 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3105 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3106 struct nfs4_client_reclaim
, cr_strhash
);
3107 list_del(&crp
->cr_strhash
);
3109 reclaim_str_hashtbl_size
--;
3112 BUG_ON(reclaim_str_hashtbl_size
);
3116 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3117 static struct nfs4_client_reclaim
*
3118 nfs4_find_reclaim_client(clientid_t
*clid
)
3120 unsigned int strhashval
;
3121 struct nfs4_client
*clp
;
3122 struct nfs4_client_reclaim
*crp
= NULL
;
3125 /* find clientid in conf_id_hashtbl */
3126 clp
= find_confirmed_client(clid
);
3130 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3131 clp
->cl_name
.len
, clp
->cl_name
.data
,
3134 /* find clp->cl_name in reclaim_str_hashtbl */
3135 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3136 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3137 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3145 * Called from OPEN. Look for clientid in reclaim list.
3148 nfs4_check_open_reclaim(clientid_t
*clid
)
3150 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3153 /* initialization to perform at module load time: */
3156 nfs4_state_init(void)
3160 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3161 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3162 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3163 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3164 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3166 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3167 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3169 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3170 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3171 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3173 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3174 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3175 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3177 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3178 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3179 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3181 memset(&onestateid
, ~0, sizeof(stateid_t
));
3182 INIT_LIST_HEAD(&close_lru
);
3183 INIT_LIST_HEAD(&client_lru
);
3184 INIT_LIST_HEAD(&del_recall_lru
);
3185 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3186 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3187 reclaim_str_hashtbl_size
= 0;
3191 nfsd4_load_reboot_recovery_data(void)
3196 nfsd4_init_recdir(user_recovery_dirname
);
3197 status
= nfsd4_recdir_load();
3198 nfs4_unlock_state();
3200 printk("NFSD: Failure reading reboot recovery data\n");
3204 get_nfs4_grace_period(void)
3206 return max(user_lease_time
, lease_time
) * HZ
;
3210 * Since the lifetime of a delegation isn't limited to that of an open, a
3211 * client may quite reasonably hang on to a delegation as long as it has
3212 * the inode cached. This becomes an obvious problem the first time a
3213 * client's inode cache approaches the size of the server's total memory.
3215 * For now we avoid this problem by imposing a hard limit on the number
3216 * of delegations, which varies according to the server's memory size.
3219 set_max_delegations(void)
3222 * Allow at most 4 delegations per megabyte of RAM. Quick
3223 * estimates suggest that in the worst case (where every delegation
3224 * is for a different inode), a delegation could take about 1.5K,
3225 * giving a worst case usage of about 6% of memory.
3227 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
3230 /* initialization to perform when the nfsd service is started: */
3233 __nfs4_state_start(void)
3235 unsigned long grace_time
;
3237 boot_time
= get_seconds();
3238 grace_time
= get_nfs_grace_period();
3239 lease_time
= user_lease_time
;
3241 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
3243 laundry_wq
= create_singlethread_workqueue("nfsd4");
3244 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
);
3245 set_max_delegations();
3249 nfs4_state_start(void)
3255 status
= nfsd4_init_slabs();
3258 nfsd4_load_reboot_recovery_data();
3259 __nfs4_state_start();
3271 nfs4_lease_time(void)
3277 __nfs4_state_shutdown(void)
3280 struct nfs4_client
*clp
= NULL
;
3281 struct nfs4_delegation
*dp
= NULL
;
3282 struct list_head
*pos
, *next
, reaplist
;
3284 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3285 while (!list_empty(&conf_id_hashtbl
[i
])) {
3286 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3289 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3290 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3294 INIT_LIST_HEAD(&reaplist
);
3295 spin_lock(&recall_lock
);
3296 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3297 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3298 list_move(&dp
->dl_recall_lru
, &reaplist
);
3300 spin_unlock(&recall_lock
);
3301 list_for_each_safe(pos
, next
, &reaplist
) {
3302 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3303 list_del_init(&dp
->dl_recall_lru
);
3304 unhash_delegation(dp
);
3307 nfsd4_shutdown_recdir();
3312 nfs4_state_shutdown(void)
3314 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
3315 destroy_workqueue(laundry_wq
);
3317 nfs4_release_reclaim();
3318 __nfs4_state_shutdown();
3320 nfs4_unlock_state();
3324 nfs4_set_recdir(char *recdir
)
3327 strcpy(user_recovery_dirname
, recdir
);
3328 nfs4_unlock_state();
3332 * Change the NFSv4 recovery directory to recdir.
3335 nfs4_reset_recoverydir(char *recdir
)
3338 struct nameidata nd
;
3340 status
= path_lookup(recdir
, LOOKUP_FOLLOW
, &nd
);
3344 if (S_ISDIR(nd
.dentry
->d_inode
->i_mode
)) {
3345 nfs4_set_recdir(recdir
);
3353 * Called when leasetime is changed.
3355 * The only way the protocol gives us to handle on-the-fly lease changes is to
3356 * simulate a reboot. Instead of doing that, we just wait till the next time
3357 * we start to register any changes in lease time. If the administrator
3358 * really wants to change the lease time *now*, they can go ahead and bring
3359 * nfsd down and then back up again after changing the lease time.
3362 nfs4_reset_lease(time_t leasetime
)
3365 user_lease_time
= leasetime
;