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/mutex.h>
54 #define NFSDDBG_FACILITY NFSDDBG_PROC
57 static time_t lease_time
= 90; /* default lease time */
58 static time_t user_lease_time
= 90;
59 static time_t boot_time
;
60 static int in_grace
= 1;
61 static u32 current_clientid
= 1;
62 static u32 current_ownerid
= 1;
63 static u32 current_fileid
= 1;
64 static u32 current_delegid
= 1;
66 static stateid_t zerostateid
; /* bits all 0 */
67 static stateid_t onestateid
; /* bits all 1 */
69 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
70 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
74 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
75 static void release_stateid_lockowners(struct nfs4_stateid
*open_stp
);
76 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
77 static void nfs4_set_recdir(char *recdir
);
82 * protects clientid_hashtbl[], clientstr_hashtbl[],
83 * unconfstr_hashtbl[], uncofid_hashtbl[].
85 static DEFINE_MUTEX(client_mutex
);
87 static kmem_cache_t
*stateowner_slab
= NULL
;
88 static kmem_cache_t
*file_slab
= NULL
;
89 static kmem_cache_t
*stateid_slab
= NULL
;
90 static kmem_cache_t
*deleg_slab
= NULL
;
95 mutex_lock(&client_mutex
);
99 nfs4_unlock_state(void)
101 mutex_unlock(&client_mutex
);
105 opaque_hashval(const void *ptr
, int nbytes
)
107 unsigned char *cptr
= (unsigned char *) ptr
;
117 /* forward declarations */
118 static void release_stateowner(struct nfs4_stateowner
*sop
);
119 static void release_stateid(struct nfs4_stateid
*stp
, int flags
);
125 /* recall_lock protects the del_recall_lru */
126 static spinlock_t recall_lock
= SPIN_LOCK_UNLOCKED
;
127 static struct list_head del_recall_lru
;
130 free_nfs4_file(struct kref
*kref
)
132 struct nfs4_file
*fp
= container_of(kref
, struct nfs4_file
, fi_ref
);
133 list_del(&fp
->fi_hash
);
135 kmem_cache_free(file_slab
, fp
);
139 put_nfs4_file(struct nfs4_file
*fi
)
141 kref_put(&fi
->fi_ref
, free_nfs4_file
);
145 get_nfs4_file(struct nfs4_file
*fi
)
147 kref_get(&fi
->fi_ref
);
150 static int num_delegations
;
153 * Open owner state (share locks)
156 /* hash tables for nfs4_stateowner */
157 #define OWNER_HASH_BITS 8
158 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
159 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
161 #define ownerid_hashval(id) \
162 ((id) & OWNER_HASH_MASK)
163 #define ownerstr_hashval(clientid, ownername) \
164 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
166 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
167 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
169 /* hash table for nfs4_file */
170 #define FILE_HASH_BITS 8
171 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
172 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
173 /* hash table for (open)nfs4_stateid */
174 #define STATEID_HASH_BITS 10
175 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
176 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
178 #define file_hashval(x) \
179 hash_ptr(x, FILE_HASH_BITS)
180 #define stateid_hashval(owner_id, file_id) \
181 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
183 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
184 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
186 static struct nfs4_delegation
*
187 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
189 struct nfs4_delegation
*dp
;
190 struct nfs4_file
*fp
= stp
->st_file
;
191 struct nfs4_callback
*cb
= &stp
->st_stateowner
->so_client
->cl_callback
;
193 dprintk("NFSD alloc_init_deleg\n");
194 if (num_delegations
> STATEID_HASH_SIZE
* 4)
196 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
200 INIT_LIST_HEAD(&dp
->dl_perfile
);
201 INIT_LIST_HEAD(&dp
->dl_perclnt
);
202 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
207 get_file(stp
->st_vfs_file
);
208 dp
->dl_vfs_file
= stp
->st_vfs_file
;
210 dp
->dl_recall
.cbr_dp
= NULL
;
211 dp
->dl_recall
.cbr_ident
= cb
->cb_ident
;
212 dp
->dl_recall
.cbr_trunc
= 0;
213 dp
->dl_stateid
.si_boot
= boot_time
;
214 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
215 dp
->dl_stateid
.si_fileid
= 0;
216 dp
->dl_stateid
.si_generation
= 0;
217 dp
->dl_fhlen
= current_fh
->fh_handle
.fh_size
;
218 memcpy(dp
->dl_fhval
, ¤t_fh
->fh_handle
.fh_base
,
219 current_fh
->fh_handle
.fh_size
);
221 atomic_set(&dp
->dl_count
, 1);
222 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
223 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
228 nfs4_put_delegation(struct nfs4_delegation
*dp
)
230 if (atomic_dec_and_test(&dp
->dl_count
)) {
231 dprintk("NFSD: freeing dp %p\n",dp
);
232 put_nfs4_file(dp
->dl_file
);
233 kmem_cache_free(deleg_slab
, dp
);
238 /* Remove the associated file_lock first, then remove the delegation.
239 * lease_modify() is called to remove the FS_LEASE file_lock from
240 * the i_flock list, eventually calling nfsd's lock_manager
241 * fl_release_callback.
244 nfs4_close_delegation(struct nfs4_delegation
*dp
)
246 struct file
*filp
= dp
->dl_vfs_file
;
248 dprintk("NFSD: close_delegation dp %p\n",dp
);
249 dp
->dl_vfs_file
= NULL
;
250 /* The following nfsd_close may not actually close the file,
251 * but we want to remove the lease in any case. */
253 setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
257 /* Called under the state lock. */
259 unhash_delegation(struct nfs4_delegation
*dp
)
261 list_del_init(&dp
->dl_perfile
);
262 list_del_init(&dp
->dl_perclnt
);
263 spin_lock(&recall_lock
);
264 list_del_init(&dp
->dl_recall_lru
);
265 spin_unlock(&recall_lock
);
266 nfs4_close_delegation(dp
);
267 nfs4_put_delegation(dp
);
274 /* Hash tables for nfs4_clientid state */
275 #define CLIENT_HASH_BITS 4
276 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
277 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
279 #define clientid_hashval(id) \
280 ((id) & CLIENT_HASH_MASK)
281 #define clientstr_hashval(name) \
282 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
284 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
285 * used in reboot/reset lease grace period processing
287 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
288 * setclientid_confirmed info.
290 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
293 * client_lru holds client queue ordered by nfs4_client.cl_time
296 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
297 * for last close replay.
299 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
300 static int reclaim_str_hashtbl_size
= 0;
301 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
302 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
303 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
304 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
305 static struct list_head client_lru
;
306 static struct list_head close_lru
;
309 renew_client(struct nfs4_client
*clp
)
312 * Move client to the end to the LRU list.
314 dprintk("renewing client (clientid %08x/%08x)\n",
315 clp
->cl_clientid
.cl_boot
,
316 clp
->cl_clientid
.cl_id
);
317 list_move_tail(&clp
->cl_lru
, &client_lru
);
318 clp
->cl_time
= get_seconds();
321 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
323 STALE_CLIENTID(clientid_t
*clid
)
325 if (clid
->cl_boot
== boot_time
)
327 dprintk("NFSD stale clientid (%08x/%08x)\n",
328 clid
->cl_boot
, clid
->cl_id
);
333 * XXX Should we use a slab cache ?
334 * This type of memory management is somewhat inefficient, but we use it
335 * anyway since SETCLIENTID is not a common operation.
337 static inline struct nfs4_client
*
338 alloc_client(struct xdr_netobj name
)
340 struct nfs4_client
*clp
;
342 if ((clp
= kmalloc(sizeof(struct nfs4_client
), GFP_KERNEL
))!= NULL
) {
343 memset(clp
, 0, sizeof(*clp
));
344 if ((clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
)) != NULL
) {
345 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
346 clp
->cl_name
.len
= name
.len
;
357 free_client(struct nfs4_client
*clp
)
359 if (clp
->cl_cred
.cr_group_info
)
360 put_group_info(clp
->cl_cred
.cr_group_info
);
361 kfree(clp
->cl_name
.data
);
366 put_nfs4_client(struct nfs4_client
*clp
)
368 if (atomic_dec_and_test(&clp
->cl_count
))
373 shutdown_callback_client(struct nfs4_client
*clp
)
375 struct rpc_clnt
*clnt
= clp
->cl_callback
.cb_client
;
377 /* shutdown rpc client, ending any outstanding recall rpcs */
379 clp
->cl_callback
.cb_client
= NULL
;
380 rpc_shutdown_client(clnt
);
386 expire_client(struct nfs4_client
*clp
)
388 struct nfs4_stateowner
*sop
;
389 struct nfs4_delegation
*dp
;
390 struct list_head reaplist
;
392 dprintk("NFSD: expire_client cl_count %d\n",
393 atomic_read(&clp
->cl_count
));
395 shutdown_callback_client(clp
);
397 INIT_LIST_HEAD(&reaplist
);
398 spin_lock(&recall_lock
);
399 while (!list_empty(&clp
->cl_delegations
)) {
400 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
401 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
403 list_del_init(&dp
->dl_perclnt
);
404 list_move(&dp
->dl_recall_lru
, &reaplist
);
406 spin_unlock(&recall_lock
);
407 while (!list_empty(&reaplist
)) {
408 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
409 list_del_init(&dp
->dl_recall_lru
);
410 unhash_delegation(dp
);
412 list_del(&clp
->cl_idhash
);
413 list_del(&clp
->cl_strhash
);
414 list_del(&clp
->cl_lru
);
415 while (!list_empty(&clp
->cl_openowners
)) {
416 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
417 release_stateowner(sop
);
419 put_nfs4_client(clp
);
422 static struct nfs4_client
*
423 create_client(struct xdr_netobj name
, char *recdir
) {
424 struct nfs4_client
*clp
;
426 if (!(clp
= alloc_client(name
)))
428 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
429 atomic_set(&clp
->cl_count
, 1);
430 atomic_set(&clp
->cl_callback
.cb_set
, 0);
431 INIT_LIST_HEAD(&clp
->cl_idhash
);
432 INIT_LIST_HEAD(&clp
->cl_strhash
);
433 INIT_LIST_HEAD(&clp
->cl_openowners
);
434 INIT_LIST_HEAD(&clp
->cl_delegations
);
435 INIT_LIST_HEAD(&clp
->cl_lru
);
441 copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
) {
442 memcpy(target
->cl_verifier
.data
, source
->data
, sizeof(target
->cl_verifier
.data
));
446 copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
) {
447 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
448 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
452 copy_cred(struct svc_cred
*target
, struct svc_cred
*source
) {
454 target
->cr_uid
= source
->cr_uid
;
455 target
->cr_gid
= source
->cr_gid
;
456 target
->cr_group_info
= source
->cr_group_info
;
457 get_group_info(target
->cr_group_info
);
461 same_name(const char *n1
, const char *n2
) {
462 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
466 cmp_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
) {
467 return(!memcmp(v1
->data
,v2
->data
,sizeof(v1
->data
)));
471 cmp_clid(clientid_t
* cl1
, clientid_t
* cl2
) {
472 return((cl1
->cl_boot
== cl2
->cl_boot
) &&
473 (cl1
->cl_id
== cl2
->cl_id
));
476 /* XXX what about NGROUP */
478 cmp_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
){
479 return(cr1
->cr_uid
== cr2
->cr_uid
);
484 gen_clid(struct nfs4_client
*clp
) {
485 clp
->cl_clientid
.cl_boot
= boot_time
;
486 clp
->cl_clientid
.cl_id
= current_clientid
++;
490 gen_confirm(struct nfs4_client
*clp
) {
495 p
= (u32
*)clp
->cl_confirm
.data
;
501 check_name(struct xdr_netobj name
) {
505 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
506 printk("NFSD: check_name: name too long(%d)!\n", name
.len
);
513 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
515 unsigned int idhashval
;
517 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
518 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
519 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
520 list_add_tail(&clp
->cl_lru
, &client_lru
);
521 clp
->cl_time
= get_seconds();
525 move_to_confirmed(struct nfs4_client
*clp
)
527 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
528 unsigned int strhashval
;
530 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
531 list_del_init(&clp
->cl_strhash
);
532 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
533 strhashval
= clientstr_hashval(clp
->cl_recdir
);
534 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
538 static struct nfs4_client
*
539 find_confirmed_client(clientid_t
*clid
)
541 struct nfs4_client
*clp
;
542 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
544 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
545 if (cmp_clid(&clp
->cl_clientid
, clid
))
551 static struct nfs4_client
*
552 find_unconfirmed_client(clientid_t
*clid
)
554 struct nfs4_client
*clp
;
555 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
557 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
558 if (cmp_clid(&clp
->cl_clientid
, clid
))
564 static struct nfs4_client
*
565 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
567 struct nfs4_client
*clp
;
569 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
570 if (same_name(clp
->cl_recdir
, dname
))
576 static struct nfs4_client
*
577 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
579 struct nfs4_client
*clp
;
581 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
582 if (same_name(clp
->cl_recdir
, dname
))
588 /* a helper function for parse_callback */
590 parse_octet(unsigned int *lenp
, char **addrp
)
592 unsigned int len
= *lenp
;
604 if ((c
< '0') || (c
> '9')) {
610 n
= (n
* 10) + (c
- '0');
621 /* parse and set the setclientid ipv4 callback address */
623 parse_ipv4(unsigned int addr_len
, char *addr_val
, unsigned int *cbaddrp
, unsigned short *cbportp
)
628 u32 addrlen
= addr_len
;
629 char *addr
= addr_val
;
634 for(i
= 4; i
> 0 ; i
--) {
635 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
638 cbaddr
|= (temp
<< shift
);
646 for(i
= 2; i
> 0 ; i
--) {
647 if ((temp
= parse_octet(&addrlen
, &addr
)) < 0) {
650 cbport
|= (temp
<< shift
);
659 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
)
661 struct nfs4_callback
*cb
= &clp
->cl_callback
;
663 /* Currently, we only support tcp for the callback channel */
664 if ((se
->se_callback_netid_len
!= 3) || memcmp((char *)se
->se_callback_netid_val
, "tcp", 3))
667 if ( !(parse_ipv4(se
->se_callback_addr_len
, se
->se_callback_addr_val
,
668 &cb
->cb_addr
, &cb
->cb_port
)))
670 cb
->cb_prog
= se
->se_callback_prog
;
671 cb
->cb_ident
= se
->se_callback_ident
;
674 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
675 "will not receive delegations\n",
676 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
682 * RFC 3010 has a complex implmentation description of processing a
683 * SETCLIENTID request consisting of 5 bullets, labeled as
684 * CASE0 - CASE4 below.
687 * callback information will be processed in a future patch
689 * an unconfirmed record is added when:
690 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
691 * CASE 1: confirmed record found with matching name, principal,
692 * verifier, and clientid.
693 * CASE 2: confirmed record found with matching name, principal,
694 * and there is no unconfirmed record with matching
697 * an unconfirmed record is replaced when:
698 * CASE 3: confirmed record found with matching name, principal,
699 * and an unconfirmed record is found with matching
700 * name, principal, and with clientid and
701 * confirm that does not match the confirmed record.
702 * CASE 4: there is no confirmed record with matching name and
703 * principal. there is an unconfirmed record with
704 * matching name, principal.
706 * an unconfirmed record is deleted when:
707 * CASE 1: an unconfirmed record that matches input name, verifier,
708 * and confirmed clientid.
709 * CASE 4: any unconfirmed records with matching name and principal
710 * that exist after an unconfirmed record has been replaced
711 * as described above.
715 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_setclientid
*setclid
)
717 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
718 struct xdr_netobj clname
= {
719 .len
= setclid
->se_namelen
,
720 .data
= setclid
->se_name
,
722 nfs4_verifier clverifier
= setclid
->se_verf
;
723 unsigned int strhashval
;
724 struct nfs4_client
*conf
, *unconf
, *new;
726 char dname
[HEXDIR_LEN
];
728 if (!check_name(clname
))
731 status
= nfs4_make_rec_clidname(dname
, &clname
);
736 * XXX The Duplicate Request Cache (DRC) has been checked (??)
737 * We get here on a DRC miss.
740 strhashval
= clientstr_hashval(dname
);
743 conf
= find_confirmed_client_by_str(dname
, strhashval
);
747 * clname match, confirmed, different principal
748 * or different ip_address
750 status
= nfserr_clid_inuse
;
751 if (!cmp_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)
752 || conf
->cl_addr
!= ip_addr
) {
753 printk("NFSD: setclientid: string in use by client"
754 "(clientid %08x/%08x)\n",
755 conf
->cl_clientid
.cl_boot
, conf
->cl_clientid
.cl_id
);
759 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
760 status
= nfserr_resource
;
764 * placed first, because it is the normal case.
767 expire_client(unconf
);
768 new = create_client(clname
, dname
);
771 copy_verf(new, &clverifier
);
772 new->cl_addr
= ip_addr
;
773 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
776 gen_callback(new, setclid
);
777 add_to_unconfirmed(new, strhashval
);
778 } else if (cmp_verf(&conf
->cl_verifier
, &clverifier
)) {
781 * cl_name match, confirmed, principal match
782 * verifier match: probable callback update
784 * remove any unconfirmed nfs4_client with
785 * matching cl_name, cl_verifier, and cl_clientid
787 * create and insert an unconfirmed nfs4_client with same
788 * cl_name, cl_verifier, and cl_clientid as existing
789 * nfs4_client, but with the new callback info and a
793 /* Note this is removing unconfirmed {*x***},
794 * which is stronger than RFC recommended {vxc**}.
795 * This has the advantage that there is at most
796 * one {*x***} in either list at any time.
798 expire_client(unconf
);
800 new = create_client(clname
, dname
);
803 copy_verf(new,&conf
->cl_verifier
);
804 new->cl_addr
= ip_addr
;
805 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
806 copy_clid(new, conf
);
808 gen_callback(new, setclid
);
809 add_to_unconfirmed(new,strhashval
);
810 } else if (!unconf
) {
813 * clname match, confirmed, principal match
814 * verfier does not match
815 * no unconfirmed. create a new unconfirmed nfs4_client
816 * using input clverifier, clname, and callback info
817 * and generate a new cl_clientid and cl_confirm.
819 new = create_client(clname
, dname
);
822 copy_verf(new,&clverifier
);
823 new->cl_addr
= ip_addr
;
824 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
827 gen_callback(new, setclid
);
828 add_to_unconfirmed(new, strhashval
);
829 } else if (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
)) {
832 * confirmed found (name, principal match)
833 * confirmed verifier does not match input clverifier
835 * unconfirmed found (name match)
836 * confirmed->cl_confirm != unconfirmed->cl_confirm
838 * remove unconfirmed.
840 * create an unconfirmed nfs4_client
841 * with same cl_name as existing confirmed nfs4_client,
842 * but with new callback info, new cl_clientid,
843 * new cl_verifier and a new cl_confirm
845 expire_client(unconf
);
846 new = create_client(clname
, dname
);
849 copy_verf(new,&clverifier
);
850 new->cl_addr
= ip_addr
;
851 copy_cred(&new->cl_cred
,&rqstp
->rq_cred
);
854 gen_callback(new, setclid
);
855 add_to_unconfirmed(new, strhashval
);
857 /* No cases hit !!! */
858 status
= nfserr_inval
;
862 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
863 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
864 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
873 * RFC 3010 has a complex implmentation description of processing a
874 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
875 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
877 * NOTE: callback information will be processed here in a future patch
880 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
, struct nfsd4_setclientid_confirm
*setclientid_confirm
)
882 u32 ip_addr
= rqstp
->rq_addr
.sin_addr
.s_addr
;
883 struct nfs4_client
*conf
, *unconf
;
884 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
885 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
888 if (STALE_CLIENTID(clid
))
889 return nfserr_stale_clientid
;
891 * XXX The Duplicate Request Cache (DRC) has been checked (??)
892 * We get here on a DRC miss.
897 conf
= find_confirmed_client(clid
);
898 unconf
= find_unconfirmed_client(clid
);
900 status
= nfserr_clid_inuse
;
901 if (conf
&& conf
->cl_addr
!= ip_addr
)
903 if (unconf
&& unconf
->cl_addr
!= ip_addr
)
906 if ((conf
&& unconf
) &&
907 (cmp_verf(&unconf
->cl_confirm
, &confirm
)) &&
908 (cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
)) &&
909 (same_name(conf
->cl_recdir
,unconf
->cl_recdir
)) &&
910 (!cmp_verf(&conf
->cl_confirm
, &unconf
->cl_confirm
))) {
912 * unconf record that matches input clientid and input confirm.
913 * conf record that matches input clientid.
914 * conf and unconf records match names, verifiers
916 if (!cmp_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
917 status
= nfserr_clid_inuse
;
919 /* XXX: We just turn off callbacks until we can handle
920 * change request correctly. */
921 atomic_set(&conf
->cl_callback
.cb_set
, 0);
923 nfsd4_remove_clid_dir(unconf
);
924 expire_client(unconf
);
928 } else if ((conf
&& !unconf
) ||
930 (!cmp_verf(&conf
->cl_verifier
, &unconf
->cl_verifier
) ||
931 !same_name(conf
->cl_recdir
, unconf
->cl_recdir
)))) {
933 * conf record that matches input clientid.
934 * if unconf record matches input clientid, then
935 * unconf->cl_name or unconf->cl_verifier don't match the
938 if (!cmp_creds(&conf
->cl_cred
,&rqstp
->rq_cred
))
939 status
= nfserr_clid_inuse
;
942 } else if (!conf
&& unconf
943 && cmp_verf(&unconf
->cl_confirm
, &confirm
)) {
945 * conf record not found.
946 * unconf record found.
947 * unconf->cl_confirm matches input confirm
949 if (!cmp_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
950 status
= nfserr_clid_inuse
;
953 clientstr_hashval(unconf
->cl_recdir
);
954 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
957 nfsd4_remove_clid_dir(conf
);
960 move_to_confirmed(unconf
);
964 } else if ((!conf
|| (conf
&& !cmp_verf(&conf
->cl_confirm
, &confirm
)))
965 && (!unconf
|| (unconf
&& !cmp_verf(&unconf
->cl_confirm
,
968 * conf record not found, or if conf, conf->cl_confirm does not
969 * match input confirm.
970 * unconf record not found, or if unconf, unconf->cl_confirm
971 * does not match input confirm.
973 status
= nfserr_stale_clientid
;
975 /* check that we have hit one of the cases...*/
976 status
= nfserr_clid_inuse
;
980 nfsd4_probe_callback(conf
);
985 /* OPEN Share state helper functions */
986 static inline struct nfs4_file
*
987 alloc_init_file(struct inode
*ino
)
989 struct nfs4_file
*fp
;
990 unsigned int hashval
= file_hashval(ino
);
992 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
994 kref_init(&fp
->fi_ref
);
995 INIT_LIST_HEAD(&fp
->fi_hash
);
996 INIT_LIST_HEAD(&fp
->fi_stateids
);
997 INIT_LIST_HEAD(&fp
->fi_delegations
);
998 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
999 fp
->fi_inode
= igrab(ino
);
1000 fp
->fi_id
= current_fileid
++;
1007 nfsd4_free_slab(kmem_cache_t
**slab
)
1013 status
= kmem_cache_destroy(*slab
);
1019 nfsd4_free_slabs(void)
1021 nfsd4_free_slab(&stateowner_slab
);
1022 nfsd4_free_slab(&file_slab
);
1023 nfsd4_free_slab(&stateid_slab
);
1024 nfsd4_free_slab(&deleg_slab
);
1028 nfsd4_init_slabs(void)
1030 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1031 sizeof(struct nfs4_stateowner
), 0, 0, NULL
, NULL
);
1032 if (stateowner_slab
== NULL
)
1034 file_slab
= kmem_cache_create("nfsd4_files",
1035 sizeof(struct nfs4_file
), 0, 0, NULL
, NULL
);
1036 if (file_slab
== NULL
)
1038 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1039 sizeof(struct nfs4_stateid
), 0, 0, NULL
, NULL
);
1040 if (stateid_slab
== NULL
)
1042 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1043 sizeof(struct nfs4_delegation
), 0, 0, NULL
, NULL
);
1044 if (deleg_slab
== NULL
)
1049 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1054 nfs4_free_stateowner(struct kref
*kref
)
1056 struct nfs4_stateowner
*sop
=
1057 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1058 kfree(sop
->so_owner
.data
);
1059 kmem_cache_free(stateowner_slab
, sop
);
1062 static inline struct nfs4_stateowner
*
1063 alloc_stateowner(struct xdr_netobj
*owner
)
1065 struct nfs4_stateowner
*sop
;
1067 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1068 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1069 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1070 sop
->so_owner
.len
= owner
->len
;
1071 kref_init(&sop
->so_ref
);
1074 kmem_cache_free(stateowner_slab
, sop
);
1079 static struct nfs4_stateowner
*
1080 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1081 struct nfs4_stateowner
*sop
;
1082 struct nfs4_replay
*rp
;
1083 unsigned int idhashval
;
1085 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1087 idhashval
= ownerid_hashval(current_ownerid
);
1088 INIT_LIST_HEAD(&sop
->so_idhash
);
1089 INIT_LIST_HEAD(&sop
->so_strhash
);
1090 INIT_LIST_HEAD(&sop
->so_perclient
);
1091 INIT_LIST_HEAD(&sop
->so_stateids
);
1092 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1093 INIT_LIST_HEAD(&sop
->so_close_lru
);
1095 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1096 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1097 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1098 sop
->so_is_open_owner
= 1;
1099 sop
->so_id
= current_ownerid
++;
1100 sop
->so_client
= clp
;
1101 sop
->so_seqid
= open
->op_seqid
;
1102 sop
->so_confirmed
= 0;
1103 rp
= &sop
->so_replay
;
1104 rp
->rp_status
= nfserr_serverfault
;
1106 rp
->rp_buf
= rp
->rp_ibuf
;
1111 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
1113 struct nfs4_stateowner
*lock_sop
;
1115 while (!list_empty(&open_stp
->st_lockowners
)) {
1116 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
1117 struct nfs4_stateowner
, so_perstateid
);
1118 /* list_del(&open_stp->st_lockowners); */
1119 BUG_ON(lock_sop
->so_is_open_owner
);
1120 release_stateowner(lock_sop
);
1125 unhash_stateowner(struct nfs4_stateowner
*sop
)
1127 struct nfs4_stateid
*stp
;
1129 list_del(&sop
->so_idhash
);
1130 list_del(&sop
->so_strhash
);
1131 if (sop
->so_is_open_owner
)
1132 list_del(&sop
->so_perclient
);
1133 list_del(&sop
->so_perstateid
);
1134 while (!list_empty(&sop
->so_stateids
)) {
1135 stp
= list_entry(sop
->so_stateids
.next
,
1136 struct nfs4_stateid
, st_perstateowner
);
1137 if (sop
->so_is_open_owner
)
1138 release_stateid(stp
, OPEN_STATE
);
1140 release_stateid(stp
, LOCK_STATE
);
1145 release_stateowner(struct nfs4_stateowner
*sop
)
1147 unhash_stateowner(sop
);
1148 list_del(&sop
->so_close_lru
);
1149 nfs4_put_stateowner(sop
);
1153 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1154 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1155 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1157 INIT_LIST_HEAD(&stp
->st_hash
);
1158 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1159 INIT_LIST_HEAD(&stp
->st_lockowners
);
1160 INIT_LIST_HEAD(&stp
->st_perfile
);
1161 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1162 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1163 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1164 stp
->st_stateowner
= sop
;
1167 stp
->st_stateid
.si_boot
= boot_time
;
1168 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1169 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1170 stp
->st_stateid
.si_generation
= 0;
1171 stp
->st_access_bmap
= 0;
1172 stp
->st_deny_bmap
= 0;
1173 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1174 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1175 stp
->st_openstp
= NULL
;
1179 release_stateid(struct nfs4_stateid
*stp
, int flags
)
1181 struct file
*filp
= stp
->st_vfs_file
;
1183 list_del(&stp
->st_hash
);
1184 list_del(&stp
->st_perfile
);
1185 list_del(&stp
->st_perstateowner
);
1186 if (flags
& OPEN_STATE
) {
1187 release_stateid_lockowners(stp
);
1188 stp
->st_vfs_file
= NULL
;
1190 } else if (flags
& LOCK_STATE
)
1191 locks_remove_posix(filp
, (fl_owner_t
) stp
->st_stateowner
);
1192 put_nfs4_file(stp
->st_file
);
1193 kmem_cache_free(stateid_slab
, stp
);
1197 move_to_close_lru(struct nfs4_stateowner
*sop
)
1199 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1201 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1202 sop
->so_time
= get_seconds();
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_locked
;
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(struct nfsd4_open
*open
)
1447 clientid_t
*clientid
= &open
->op_clientid
;
1448 struct nfs4_client
*clp
= NULL
;
1449 unsigned int strhashval
;
1450 struct nfs4_stateowner
*sop
= NULL
;
1452 if (!check_name(open
->op_owner
))
1453 return nfserr_inval
;
1455 if (STALE_CLIENTID(&open
->op_clientid
))
1456 return nfserr_stale_clientid
;
1458 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
1459 sop
= find_openstateowner_str(strhashval
, open
);
1460 open
->op_stateowner
= sop
;
1462 /* Make sure the client's lease hasn't expired. */
1463 clp
= find_confirmed_client(clientid
);
1465 return nfserr_expired
;
1468 if (!sop
->so_confirmed
) {
1469 /* Replace unconfirmed owners without checking for replay. */
1470 clp
= sop
->so_client
;
1471 release_stateowner(sop
);
1472 open
->op_stateowner
= NULL
;
1475 if (open
->op_seqid
== sop
->so_seqid
- 1) {
1476 if (sop
->so_replay
.rp_buflen
)
1477 return NFSERR_REPLAY_ME
;
1478 /* The original OPEN failed so spectacularly
1479 * that we don't even have replay data saved!
1480 * Therefore, we have no choice but to continue
1481 * processing this OPEN; presumably, we'll
1482 * fail again for the same reason.
1484 dprintk("nfsd4_process_open1: replay with no replay cache\n");
1487 if (open
->op_seqid
!= sop
->so_seqid
)
1488 return nfserr_bad_seqid
;
1490 if (open
->op_stateowner
== NULL
) {
1491 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
1493 return nfserr_resource
;
1494 open
->op_stateowner
= sop
;
1496 list_del_init(&sop
->so_close_lru
);
1497 renew_client(sop
->so_client
);
1502 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
1504 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
1505 return nfserr_openmode
;
1510 static struct nfs4_delegation
*
1511 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
1513 struct nfs4_delegation
*dp
;
1515 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
1516 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
1523 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
1524 struct nfs4_delegation
**dp
)
1527 int status
= nfserr_bad_stateid
;
1529 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
1532 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
1533 RD_STATE
: WR_STATE
;
1534 status
= nfs4_check_delegmode(*dp
, flags
);
1538 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1542 open
->op_stateowner
->so_confirmed
= 1;
1547 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
1549 struct nfs4_stateid
*local
;
1550 int status
= nfserr_share_denied
;
1551 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1553 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
1554 /* ignore lock owners */
1555 if (local
->st_stateowner
->so_is_open_owner
== 0)
1557 /* remember if we have seen this open owner */
1558 if (local
->st_stateowner
== sop
)
1560 /* check for conflicting share reservations */
1561 if (!test_share(local
, open
))
1569 static inline struct nfs4_stateid
*
1570 nfs4_alloc_stateid(void)
1572 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
1576 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
1577 struct nfs4_delegation
*dp
,
1578 struct svc_fh
*cur_fh
, int flags
)
1580 struct nfs4_stateid
*stp
;
1582 stp
= nfs4_alloc_stateid();
1584 return nfserr_resource
;
1587 get_file(dp
->dl_vfs_file
);
1588 stp
->st_vfs_file
= dp
->dl_vfs_file
;
1591 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
1594 if (status
== nfserr_dropit
)
1595 status
= nfserr_jukebox
;
1596 kmem_cache_free(stateid_slab
, stp
);
1605 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
1606 struct nfsd4_open
*open
)
1608 struct iattr iattr
= {
1609 .ia_valid
= ATTR_SIZE
,
1612 if (!open
->op_truncate
)
1614 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
1615 return nfserr_inval
;
1616 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
1620 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
1622 struct file
*filp
= stp
->st_vfs_file
;
1623 struct inode
*inode
= filp
->f_dentry
->d_inode
;
1624 unsigned int share_access
, new_writer
;
1627 set_access(&share_access
, stp
->st_access_bmap
);
1628 new_writer
= (~share_access
) & open
->op_share_access
1629 & NFS4_SHARE_ACCESS_WRITE
;
1632 status
= get_write_access(inode
);
1634 return nfserrno(status
);
1636 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
1639 put_write_access(inode
);
1642 /* remember the open */
1643 filp
->f_mode
|= open
->op_share_access
;
1644 set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
1645 set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1652 nfs4_set_claim_prev(struct nfsd4_open
*open
)
1654 open
->op_stateowner
->so_confirmed
= 1;
1655 open
->op_stateowner
->so_client
->cl_firststate
= 1;
1659 * Attempt to hand out a delegation.
1662 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
1664 struct nfs4_delegation
*dp
;
1665 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
1666 struct nfs4_callback
*cb
= &sop
->so_client
->cl_callback
;
1667 struct file_lock fl
, *flp
= &fl
;
1668 int status
, flag
= 0;
1670 flag
= NFS4_OPEN_DELEGATE_NONE
;
1671 open
->op_recall
= 0;
1672 switch (open
->op_claim_type
) {
1673 case NFS4_OPEN_CLAIM_PREVIOUS
:
1674 if (!atomic_read(&cb
->cb_set
))
1675 open
->op_recall
= 1;
1676 flag
= open
->op_delegate_type
;
1677 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
1680 case NFS4_OPEN_CLAIM_NULL
:
1681 /* Let's not give out any delegations till everyone's
1682 * had the chance to reclaim theirs.... */
1683 if (nfs4_in_grace())
1685 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
1687 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1688 flag
= NFS4_OPEN_DELEGATE_WRITE
;
1690 flag
= NFS4_OPEN_DELEGATE_READ
;
1696 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
1698 flag
= NFS4_OPEN_DELEGATE_NONE
;
1701 locks_init_lock(&fl
);
1702 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
1703 fl
.fl_flags
= FL_LEASE
;
1704 fl
.fl_end
= OFFSET_MAX
;
1705 fl
.fl_owner
= (fl_owner_t
)dp
;
1706 fl
.fl_file
= stp
->st_vfs_file
;
1707 fl
.fl_pid
= current
->tgid
;
1709 /* setlease checks to see if delegation should be handed out.
1710 * the lock_manager callbacks fl_mylease and fl_change are used
1712 if ((status
= setlease(stp
->st_vfs_file
,
1713 flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
, &flp
))) {
1714 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
1715 unhash_delegation(dp
);
1716 flag
= NFS4_OPEN_DELEGATE_NONE
;
1720 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
1722 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1723 dp
->dl_stateid
.si_boot
,
1724 dp
->dl_stateid
.si_stateownerid
,
1725 dp
->dl_stateid
.si_fileid
,
1726 dp
->dl_stateid
.si_generation
);
1728 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
1729 && flag
== NFS4_OPEN_DELEGATE_NONE
1730 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
1731 printk("NFSD: WARNING: refusing delegation reclaim\n");
1732 open
->op_delegate_type
= flag
;
1736 * called with nfs4_lock_state() held.
1739 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
1741 struct nfs4_file
*fp
= NULL
;
1742 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1743 struct nfs4_stateid
*stp
= NULL
;
1744 struct nfs4_delegation
*dp
= NULL
;
1747 status
= nfserr_inval
;
1748 if (!TEST_ACCESS(open
->op_share_access
) || !TEST_DENY(open
->op_share_deny
))
1751 * Lookup file; if found, lookup stateid and check open request,
1752 * and check for delegations in the process of being recalled.
1753 * If not found, create the nfs4_file struct
1755 fp
= find_file(ino
);
1757 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
1759 status
= nfs4_check_deleg(fp
, open
, &dp
);
1763 status
= nfserr_bad_stateid
;
1764 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
1766 status
= nfserr_resource
;
1767 fp
= alloc_init_file(ino
);
1773 * OPEN the file, or upgrade an existing OPEN.
1774 * If truncate fails, the OPEN fails.
1777 /* Stateid was found, this is an OPEN upgrade */
1778 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
1781 update_stateid(&stp
->st_stateid
);
1783 /* Stateid was not found, this is a new OPEN */
1785 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
1789 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
1792 init_stateid(stp
, fp
, open
);
1793 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
1795 release_stateid(stp
, OPEN_STATE
);
1799 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
1802 * Attempt to hand out a delegation. No error return, because the
1803 * OPEN succeeds even if we fail.
1805 nfs4_open_delegation(current_fh
, open
, stp
);
1809 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1810 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
1811 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
1815 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
1816 nfs4_set_claim_prev(open
);
1818 * To finish the open response, we just need to set the rflags.
1820 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
1821 if (!open
->op_stateowner
->so_confirmed
)
1822 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
1827 static struct workqueue_struct
*laundry_wq
;
1828 static struct work_struct laundromat_work
;
1829 static void laundromat_main(void *);
1830 static DECLARE_WORK(laundromat_work
, laundromat_main
, NULL
);
1833 nfsd4_renew(clientid_t
*clid
)
1835 struct nfs4_client
*clp
;
1839 dprintk("process_renew(%08x/%08x): starting\n",
1840 clid
->cl_boot
, clid
->cl_id
);
1841 status
= nfserr_stale_clientid
;
1842 if (STALE_CLIENTID(clid
))
1844 clp
= find_confirmed_client(clid
);
1845 status
= nfserr_expired
;
1847 /* We assume the client took too long to RENEW. */
1848 dprintk("nfsd4_renew: clientid not found!\n");
1852 status
= nfserr_cb_path_down
;
1853 if (!list_empty(&clp
->cl_delegations
)
1854 && !atomic_read(&clp
->cl_callback
.cb_set
))
1858 nfs4_unlock_state();
1865 dprintk("NFSD: end of grace period\n");
1866 nfsd4_recdir_purge_old();
1871 nfs4_laundromat(void)
1873 struct nfs4_client
*clp
;
1874 struct nfs4_stateowner
*sop
;
1875 struct nfs4_delegation
*dp
;
1876 struct list_head
*pos
, *next
, reaplist
;
1877 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
1878 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
1879 time_t u
, test_val
= NFSD_LEASE_TIME
;
1883 dprintk("NFSD: laundromat service - starting\n");
1886 list_for_each_safe(pos
, next
, &client_lru
) {
1887 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
1888 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
1889 t
= clp
->cl_time
- cutoff
;
1890 if (clientid_val
> t
)
1894 dprintk("NFSD: purging unused client (clientid %08x)\n",
1895 clp
->cl_clientid
.cl_id
);
1896 nfsd4_remove_clid_dir(clp
);
1899 INIT_LIST_HEAD(&reaplist
);
1900 spin_lock(&recall_lock
);
1901 list_for_each_safe(pos
, next
, &del_recall_lru
) {
1902 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1903 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
1904 u
= dp
->dl_time
- cutoff
;
1909 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1911 list_move(&dp
->dl_recall_lru
, &reaplist
);
1913 spin_unlock(&recall_lock
);
1914 list_for_each_safe(pos
, next
, &reaplist
) {
1915 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
1916 list_del_init(&dp
->dl_recall_lru
);
1917 unhash_delegation(dp
);
1919 test_val
= NFSD_LEASE_TIME
;
1920 list_for_each_safe(pos
, next
, &close_lru
) {
1921 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
1922 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
1923 u
= sop
->so_time
- cutoff
;
1928 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1930 release_stateowner(sop
);
1932 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
1933 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
1934 nfs4_unlock_state();
1935 return clientid_val
;
1939 laundromat_main(void *not_used
)
1943 t
= nfs4_laundromat();
1944 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
1945 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
1948 static struct nfs4_stateowner
*
1949 search_close_lru(u32 st_id
, int flags
)
1951 struct nfs4_stateowner
*local
= NULL
;
1953 if (flags
& CLOSE_STATE
) {
1954 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
1955 if (local
->so_id
== st_id
)
1963 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
1965 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_dentry
->d_inode
;
1969 STALE_STATEID(stateid_t
*stateid
)
1971 if (stateid
->si_boot
== boot_time
)
1973 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1974 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
1975 stateid
->si_generation
);
1980 access_permit_read(unsigned long access_bmap
)
1982 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
1983 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
1984 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
1988 access_permit_write(unsigned long access_bmap
)
1990 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
1991 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
1995 int nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
1997 int status
= nfserr_openmode
;
1999 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2001 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2009 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2011 /* Trying to call delegreturn with a special stateid? Yuch: */
2012 if (!(flags
& (RD_STATE
| WR_STATE
)))
2013 return nfserr_bad_stateid
;
2014 else if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2016 else if (nfs4_in_grace()) {
2017 /* Answer in remaining cases depends on existance of
2018 * conflicting state; so we must wait out the grace period. */
2019 return nfserr_grace
;
2020 } else if (flags
& WR_STATE
)
2021 return nfs4_share_conflict(current_fh
,
2022 NFS4_SHARE_DENY_WRITE
);
2023 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2024 return nfs4_share_conflict(current_fh
,
2025 NFS4_SHARE_DENY_READ
);
2029 * Allow READ/WRITE during grace period on recovered state only for files
2030 * that are not able to provide mandatory locking.
2033 io_during_grace_disallowed(struct inode
*inode
, int flags
)
2035 return nfs4_in_grace() && (flags
& (RD_STATE
| WR_STATE
))
2036 && MANDATORY_LOCK(inode
);
2040 * Checks for stateid operations
2043 nfs4_preprocess_stateid_op(struct svc_fh
*current_fh
, stateid_t
*stateid
, int flags
, struct file
**filpp
)
2045 struct nfs4_stateid
*stp
= NULL
;
2046 struct nfs4_delegation
*dp
= NULL
;
2048 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2051 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2052 stateid
->si_boot
, stateid
->si_stateownerid
,
2053 stateid
->si_fileid
, stateid
->si_generation
);
2057 if (io_during_grace_disallowed(ino
, flags
))
2058 return nfserr_grace
;
2060 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2061 return check_special_stateids(current_fh
, stateid
, flags
);
2064 status
= nfserr_stale_stateid
;
2065 if (STALE_STATEID(stateid
))
2069 status
= nfserr_bad_stateid
;
2070 if (!stateid
->si_fileid
) { /* delegation stateid */
2071 if(!(dp
= find_delegation_stateid(ino
, stateid
))) {
2072 dprintk("NFSD: delegation stateid not found\n");
2073 if (nfs4_in_grace())
2074 status
= nfserr_grace
;
2077 stidp
= &dp
->dl_stateid
;
2078 } else { /* open or lock stateid */
2079 if (!(stp
= find_stateid(stateid
, flags
))) {
2080 dprintk("NFSD: open or lock stateid not found\n");
2081 if (nfs4_in_grace())
2082 status
= nfserr_grace
;
2085 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
))
2087 if (!stp
->st_stateowner
->so_confirmed
)
2089 stidp
= &stp
->st_stateid
;
2091 if (stateid
->si_generation
> stidp
->si_generation
)
2095 status
= nfserr_old_stateid
;
2096 if (stateid
->si_generation
< stidp
->si_generation
)
2099 if ((status
= nfs4_check_openmode(stp
,flags
)))
2101 renew_client(stp
->st_stateowner
->so_client
);
2103 *filpp
= stp
->st_vfs_file
;
2105 if ((status
= nfs4_check_delegmode(dp
, flags
)))
2107 renew_client(dp
->dl_client
);
2108 if (flags
& DELEG_RET
)
2109 unhash_delegation(dp
);
2111 *filpp
= dp
->dl_vfs_file
;
2121 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2122 RD_STATE
: WR_STATE
;
2126 * Checks for sequence id mutating operations.
2129 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
)
2131 struct nfs4_stateid
*stp
;
2132 struct nfs4_stateowner
*sop
;
2134 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2135 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2136 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2137 stateid
->si_generation
);
2142 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2143 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2144 return nfserr_bad_stateid
;
2147 if (STALE_STATEID(stateid
))
2148 return nfserr_stale_stateid
;
2150 * We return BAD_STATEID if filehandle doesn't match stateid,
2151 * the confirmed flag is incorrecly set, or the generation
2152 * number is incorrect.
2154 stp
= find_stateid(stateid
, flags
);
2157 * Also, we should make sure this isn't just the result of
2160 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2162 return nfserr_bad_stateid
;
2168 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2169 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2170 struct nfs4_client
*clp
= sop
->so_client
;
2174 lkflg
= setlkflg(lock
->lk_type
);
2176 if (lock
->lk_is_new
) {
2177 if (!sop
->so_is_open_owner
)
2178 return nfserr_bad_stateid
;
2179 if (!cmp_clid(&clp
->cl_clientid
, lockclid
))
2180 return nfserr_bad_stateid
;
2181 /* stp is the open stateid */
2182 status
= nfs4_check_openmode(stp
, lkflg
);
2186 /* stp is the lock stateid */
2187 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2194 if ((flags
& CHECK_FH
) && nfs4_check_fh(current_fh
, stp
)) {
2195 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2196 return nfserr_bad_stateid
;
2200 *sopp
= sop
= stp
->st_stateowner
;
2203 * We now validate the seqid and stateid generation numbers.
2204 * For the moment, we ignore the possibility of
2205 * generation number wraparound.
2207 if (seqid
!= sop
->so_seqid
)
2210 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2211 printk("NFSD: preprocess_seqid_op: expected"
2212 " unconfirmed stateowner!\n");
2213 return nfserr_bad_stateid
;
2215 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2216 printk("NFSD: preprocess_seqid_op: stateowner not"
2217 " confirmed yet!\n");
2218 return nfserr_bad_stateid
;
2220 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
2221 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2222 return nfserr_bad_stateid
;
2225 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
2226 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2227 return nfserr_old_stateid
;
2229 renew_client(sop
->so_client
);
2233 if (seqid
== sop
->so_seqid
- 1) {
2234 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2235 /* indicate replay to calling function */
2236 return NFSERR_REPLAY_ME
;
2238 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2239 sop
->so_seqid
, seqid
);
2241 return nfserr_bad_seqid
;
2245 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_confirm
*oc
, struct nfs4_stateowner
**replay_owner
)
2248 struct nfs4_stateowner
*sop
;
2249 struct nfs4_stateid
*stp
;
2251 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2252 (int)current_fh
->fh_dentry
->d_name
.len
,
2253 current_fh
->fh_dentry
->d_name
.name
);
2255 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2260 if ((status
= nfs4_preprocess_seqid_op(current_fh
, oc
->oc_seqid
,
2261 &oc
->oc_req_stateid
,
2262 CHECK_FH
| CONFIRM
| OPEN_STATE
,
2263 &oc
->oc_stateowner
, &stp
, NULL
)))
2266 sop
= oc
->oc_stateowner
;
2267 sop
->so_confirmed
= 1;
2268 update_stateid(&stp
->st_stateid
);
2269 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2270 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2271 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
2272 stp
->st_stateid
.si_boot
,
2273 stp
->st_stateid
.si_stateownerid
,
2274 stp
->st_stateid
.si_fileid
,
2275 stp
->st_stateid
.si_generation
);
2277 nfsd4_create_clid_dir(sop
->so_client
);
2279 if (oc
->oc_stateowner
) {
2280 nfs4_get_stateowner(oc
->oc_stateowner
);
2281 *replay_owner
= oc
->oc_stateowner
;
2283 nfs4_unlock_state();
2289 * unset all bits in union bitmap (bmap) that
2290 * do not exist in share (from successful OPEN_DOWNGRADE)
2293 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
2296 for (i
= 1; i
< 4; i
++) {
2297 if ((i
& access
) != i
)
2298 __clear_bit(i
, bmap
);
2303 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
2306 for (i
= 0; i
< 4; i
++) {
2307 if ((i
& deny
) != i
)
2308 __clear_bit(i
, bmap
);
2313 nfsd4_open_downgrade(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open_downgrade
*od
, struct nfs4_stateowner
**replay_owner
)
2316 struct nfs4_stateid
*stp
;
2317 unsigned int share_access
;
2319 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2320 (int)current_fh
->fh_dentry
->d_name
.len
,
2321 current_fh
->fh_dentry
->d_name
.name
);
2323 if (!TEST_ACCESS(od
->od_share_access
) || !TEST_DENY(od
->od_share_deny
))
2324 return nfserr_inval
;
2327 if ((status
= nfs4_preprocess_seqid_op(current_fh
, od
->od_seqid
,
2329 CHECK_FH
| OPEN_STATE
,
2330 &od
->od_stateowner
, &stp
, NULL
)))
2333 status
= nfserr_inval
;
2334 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
2335 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2336 stp
->st_access_bmap
, od
->od_share_access
);
2339 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
2340 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2341 stp
->st_deny_bmap
, od
->od_share_deny
);
2344 set_access(&share_access
, stp
->st_access_bmap
);
2345 nfs4_file_downgrade(stp
->st_vfs_file
,
2346 share_access
& ~od
->od_share_access
);
2348 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
2349 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
2351 update_stateid(&stp
->st_stateid
);
2352 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2355 if (od
->od_stateowner
) {
2356 nfs4_get_stateowner(od
->od_stateowner
);
2357 *replay_owner
= od
->od_stateowner
;
2359 nfs4_unlock_state();
2364 * nfs4_unlock_state() called after encode
2367 nfsd4_close(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_close
*close
, struct nfs4_stateowner
**replay_owner
)
2370 struct nfs4_stateid
*stp
;
2372 dprintk("NFSD: nfsd4_close on file %.*s\n",
2373 (int)current_fh
->fh_dentry
->d_name
.len
,
2374 current_fh
->fh_dentry
->d_name
.name
);
2377 /* check close_lru for replay */
2378 if ((status
= nfs4_preprocess_seqid_op(current_fh
, close
->cl_seqid
,
2380 CHECK_FH
| OPEN_STATE
| CLOSE_STATE
,
2381 &close
->cl_stateowner
, &stp
, NULL
)))
2384 update_stateid(&stp
->st_stateid
);
2385 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2387 /* release_stateid() calls nfsd_close() if needed */
2388 release_stateid(stp
, OPEN_STATE
);
2390 /* place unused nfs4_stateowners on so_close_lru list to be
2391 * released by the laundromat service after the lease period
2392 * to enable us to handle CLOSE replay
2394 if (list_empty(&close
->cl_stateowner
->so_stateids
))
2395 move_to_close_lru(close
->cl_stateowner
);
2397 if (close
->cl_stateowner
) {
2398 nfs4_get_stateowner(close
->cl_stateowner
);
2399 *replay_owner
= close
->cl_stateowner
;
2401 nfs4_unlock_state();
2406 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_delegreturn
*dr
)
2410 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0)))
2414 status
= nfs4_preprocess_stateid_op(current_fh
, &dr
->dr_stateid
, DELEG_RET
, NULL
);
2415 nfs4_unlock_state();
2422 * Lock owner state (byte-range locks)
2424 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2425 #define LOCK_HASH_BITS 8
2426 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2427 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2429 #define lockownerid_hashval(id) \
2430 ((id) & LOCK_HASH_MASK)
2432 static inline unsigned int
2433 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
2434 struct xdr_netobj
*ownername
)
2436 return (file_hashval(inode
) + cl_id
2437 + opaque_hashval(ownername
->data
, ownername
->len
))
2441 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
2442 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
2443 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
2445 static struct nfs4_stateid
*
2446 find_stateid(stateid_t
*stid
, int flags
)
2448 struct nfs4_stateid
*local
= NULL
;
2449 u32 st_id
= stid
->si_stateownerid
;
2450 u32 f_id
= stid
->si_fileid
;
2451 unsigned int hashval
;
2453 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
2454 if ((flags
& LOCK_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2455 hashval
= stateid_hashval(st_id
, f_id
);
2456 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
2457 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2458 (local
->st_stateid
.si_fileid
== f_id
))
2462 if ((flags
& OPEN_STATE
) || (flags
& RD_STATE
) || (flags
& WR_STATE
)) {
2463 hashval
= stateid_hashval(st_id
, f_id
);
2464 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
2465 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
2466 (local
->st_stateid
.si_fileid
== f_id
))
2473 static struct nfs4_delegation
*
2474 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
2476 struct nfs4_file
*fp
;
2477 struct nfs4_delegation
*dl
;
2479 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2480 stid
->si_boot
, stid
->si_stateownerid
,
2481 stid
->si_fileid
, stid
->si_generation
);
2483 fp
= find_file(ino
);
2486 dl
= find_delegation_file(fp
, stid
);
2492 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2493 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2494 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2495 * locking, this prevents us from being completely protocol-compliant. The
2496 * real solution to this problem is to start using unsigned file offsets in
2497 * the VFS, but this is a very deep change!
2500 nfs4_transform_lock_offset(struct file_lock
*lock
)
2502 if (lock
->fl_start
< 0)
2503 lock
->fl_start
= OFFSET_MAX
;
2504 if (lock
->fl_end
< 0)
2505 lock
->fl_end
= OFFSET_MAX
;
2508 /* Hack!: For now, we're defining this just so we can use a pointer to it
2509 * as a unique cookie to identify our (NFSv4's) posix locks. */
2510 static struct lock_manager_operations nfsd_posix_mng_ops
= {
2514 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
2516 struct nfs4_stateowner
*sop
;
2519 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
2520 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
2521 hval
= lockownerid_hashval(sop
->so_id
);
2522 kref_get(&sop
->so_ref
);
2524 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
2526 deny
->ld_sop
= NULL
;
2527 deny
->ld_clientid
.cl_boot
= 0;
2528 deny
->ld_clientid
.cl_id
= 0;
2530 deny
->ld_start
= fl
->fl_start
;
2531 deny
->ld_length
= ~(u64
)0;
2532 if (fl
->fl_end
!= ~(u64
)0)
2533 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
2534 deny
->ld_type
= NFS4_READ_LT
;
2535 if (fl
->fl_type
!= F_RDLCK
)
2536 deny
->ld_type
= NFS4_WRITE_LT
;
2539 static struct nfs4_stateowner
*
2540 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
2541 struct xdr_netobj
*owner
)
2543 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
2544 struct nfs4_stateowner
*op
;
2546 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
2547 if (cmp_owner_str(op
, owner
, clid
))
2554 * Alloc a lock owner structure.
2555 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2558 * strhashval = lock_ownerstr_hashval
2561 static struct nfs4_stateowner
*
2562 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
2563 struct nfs4_stateowner
*sop
;
2564 struct nfs4_replay
*rp
;
2565 unsigned int idhashval
;
2567 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
2569 idhashval
= lockownerid_hashval(current_ownerid
);
2570 INIT_LIST_HEAD(&sop
->so_idhash
);
2571 INIT_LIST_HEAD(&sop
->so_strhash
);
2572 INIT_LIST_HEAD(&sop
->so_perclient
);
2573 INIT_LIST_HEAD(&sop
->so_stateids
);
2574 INIT_LIST_HEAD(&sop
->so_perstateid
);
2575 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
2577 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
2578 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
2579 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
2580 sop
->so_is_open_owner
= 0;
2581 sop
->so_id
= current_ownerid
++;
2582 sop
->so_client
= clp
;
2583 /* It is the openowner seqid that will be incremented in encode in the
2584 * case of new lockowners; so increment the lock seqid manually: */
2585 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
2586 sop
->so_confirmed
= 1;
2587 rp
= &sop
->so_replay
;
2588 rp
->rp_status
= nfserr_serverfault
;
2590 rp
->rp_buf
= rp
->rp_ibuf
;
2594 static struct nfs4_stateid
*
2595 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
2597 struct nfs4_stateid
*stp
;
2598 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2600 stp
= nfs4_alloc_stateid();
2603 INIT_LIST_HEAD(&stp
->st_hash
);
2604 INIT_LIST_HEAD(&stp
->st_perfile
);
2605 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2606 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
2607 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
2608 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2609 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2610 stp
->st_stateowner
= sop
;
2613 stp
->st_stateid
.si_boot
= boot_time
;
2614 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2615 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2616 stp
->st_stateid
.si_generation
= 0;
2617 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
2618 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
2619 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
2620 stp
->st_openstp
= open_stp
;
2627 check_lock_length(u64 offset
, u64 length
)
2629 return ((length
== 0) || ((length
!= ~(u64
)0) &&
2630 LOFF_OVERFLOW(offset
, length
)));
2637 nfsd4_lock(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lock
*lock
, struct nfs4_stateowner
**replay_owner
)
2639 struct nfs4_stateowner
*open_sop
= NULL
;
2640 struct nfs4_stateowner
*lock_sop
= NULL
;
2641 struct nfs4_stateid
*lock_stp
;
2643 struct file_lock file_lock
;
2644 struct file_lock conflock
;
2646 unsigned int strhashval
;
2648 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2649 (long long) lock
->lk_offset
,
2650 (long long) lock
->lk_length
);
2652 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
2653 return nfserr_inval
;
2655 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, MAY_LOCK
))) {
2656 dprintk("NFSD: nfsd4_lock: permission denied!\n");
2662 if (lock
->lk_is_new
) {
2664 * Client indicates that this is a new lockowner.
2665 * Use open owner and open stateid to create lock owner and
2668 struct nfs4_stateid
*open_stp
= NULL
;
2669 struct nfs4_file
*fp
;
2671 status
= nfserr_stale_clientid
;
2672 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
2675 /* validate and update open stateid and open seqid */
2676 status
= nfs4_preprocess_seqid_op(current_fh
,
2677 lock
->lk_new_open_seqid
,
2678 &lock
->lk_new_open_stateid
,
2679 CHECK_FH
| OPEN_STATE
,
2680 &lock
->lk_replay_owner
, &open_stp
,
2684 open_sop
= lock
->lk_replay_owner
;
2685 /* create lockowner and lock stateid */
2686 fp
= open_stp
->st_file
;
2687 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
2688 open_sop
->so_client
->cl_clientid
.cl_id
,
2689 &lock
->v
.new.owner
);
2690 /* XXX: Do we need to check for duplicate stateowners on
2691 * the same file, or should they just be allowed (and
2692 * create new stateids)? */
2693 status
= nfserr_resource
;
2694 lock_sop
= alloc_init_lock_stateowner(strhashval
,
2695 open_sop
->so_client
, open_stp
, lock
);
2696 if (lock_sop
== NULL
)
2698 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
2699 if (lock_stp
== NULL
)
2702 /* lock (lock owner + lock stateid) already exists */
2703 status
= nfs4_preprocess_seqid_op(current_fh
,
2704 lock
->lk_old_lock_seqid
,
2705 &lock
->lk_old_lock_stateid
,
2706 CHECK_FH
| LOCK_STATE
,
2707 &lock
->lk_replay_owner
, &lock_stp
, lock
);
2710 lock_sop
= lock
->lk_replay_owner
;
2712 /* lock->lk_replay_owner and lock_stp have been created or found */
2713 filp
= lock_stp
->st_vfs_file
;
2715 status
= nfserr_grace
;
2716 if (nfs4_in_grace() && !lock
->lk_reclaim
)
2718 status
= nfserr_no_grace
;
2719 if (!nfs4_in_grace() && lock
->lk_reclaim
)
2722 locks_init_lock(&file_lock
);
2723 switch (lock
->lk_type
) {
2726 file_lock
.fl_type
= F_RDLCK
;
2729 case NFS4_WRITEW_LT
:
2730 file_lock
.fl_type
= F_WRLCK
;
2733 status
= nfserr_inval
;
2736 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
2737 file_lock
.fl_pid
= current
->tgid
;
2738 file_lock
.fl_file
= filp
;
2739 file_lock
.fl_flags
= FL_POSIX
;
2740 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2742 file_lock
.fl_start
= lock
->lk_offset
;
2743 if ((lock
->lk_length
== ~(u64
)0) ||
2744 LOFF_OVERFLOW(lock
->lk_offset
, lock
->lk_length
))
2745 file_lock
.fl_end
= ~(u64
)0;
2747 file_lock
.fl_end
= lock
->lk_offset
+ lock
->lk_length
- 1;
2748 nfs4_transform_lock_offset(&file_lock
);
2751 * Try to lock the file in the VFS.
2752 * Note: locks.c uses the BKL to protect the inode's lock list.
2755 /* XXX?: Just to divert the locks_release_private at the start of
2756 * locks_copy_lock: */
2757 conflock
.fl_ops
= NULL
;
2758 conflock
.fl_lmops
= NULL
;
2759 status
= posix_lock_file_conf(filp
, &file_lock
, &conflock
);
2760 dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status
);
2762 case 0: /* success! */
2763 update_stateid(&lock_stp
->st_stateid
);
2764 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
2767 case (EAGAIN
): /* conflock holds conflicting lock */
2768 status
= nfserr_denied
;
2769 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2770 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
2773 status
= nfserr_deadlock
;
2776 dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status
);
2777 status
= nfserr_resource
;
2781 if (status
&& lock
->lk_is_new
&& lock_sop
)
2782 release_stateowner(lock_sop
);
2783 if (lock
->lk_replay_owner
) {
2784 nfs4_get_stateowner(lock
->lk_replay_owner
);
2785 *replay_owner
= lock
->lk_replay_owner
;
2787 nfs4_unlock_state();
2795 nfsd4_lockt(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lockt
*lockt
)
2797 struct inode
*inode
;
2799 struct file_lock file_lock
;
2800 struct file_lock conflock
;
2803 if (nfs4_in_grace())
2804 return nfserr_grace
;
2806 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
2807 return nfserr_inval
;
2809 lockt
->lt_stateowner
= NULL
;
2812 status
= nfserr_stale_clientid
;
2813 if (STALE_CLIENTID(&lockt
->lt_clientid
))
2816 if ((status
= fh_verify(rqstp
, current_fh
, S_IFREG
, 0))) {
2817 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2818 if (status
== nfserr_symlink
)
2819 status
= nfserr_inval
;
2823 inode
= current_fh
->fh_dentry
->d_inode
;
2824 locks_init_lock(&file_lock
);
2825 switch (lockt
->lt_type
) {
2828 file_lock
.fl_type
= F_RDLCK
;
2831 case NFS4_WRITEW_LT
:
2832 file_lock
.fl_type
= F_WRLCK
;
2835 printk("NFSD: nfs4_lockt: bad lock type!\n");
2836 status
= nfserr_inval
;
2840 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
2841 &lockt
->lt_clientid
, &lockt
->lt_owner
);
2842 if (lockt
->lt_stateowner
)
2843 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
2844 file_lock
.fl_pid
= current
->tgid
;
2845 file_lock
.fl_flags
= FL_POSIX
;
2846 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2848 file_lock
.fl_start
= lockt
->lt_offset
;
2849 if ((lockt
->lt_length
== ~(u64
)0) || LOFF_OVERFLOW(lockt
->lt_offset
, lockt
->lt_length
))
2850 file_lock
.fl_end
= ~(u64
)0;
2852 file_lock
.fl_end
= lockt
->lt_offset
+ lockt
->lt_length
- 1;
2854 nfs4_transform_lock_offset(&file_lock
);
2856 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2857 * since LOCKT doesn't require an OPEN, and therefore a struct
2858 * file may not exist, pass posix_test_lock a struct file with
2859 * only the dentry:inode set.
2861 memset(&file
, 0, sizeof (struct file
));
2862 file
.f_dentry
= current_fh
->fh_dentry
;
2865 if (posix_test_lock(&file
, &file_lock
, &conflock
)) {
2866 status
= nfserr_denied
;
2867 nfs4_set_lock_denied(&conflock
, &lockt
->lt_denied
);
2870 nfs4_unlock_state();
2875 nfsd4_locku(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_locku
*locku
, struct nfs4_stateowner
**replay_owner
)
2877 struct nfs4_stateid
*stp
;
2878 struct file
*filp
= NULL
;
2879 struct file_lock file_lock
;
2882 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2883 (long long) locku
->lu_offset
,
2884 (long long) locku
->lu_length
);
2886 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
2887 return nfserr_inval
;
2891 if ((status
= nfs4_preprocess_seqid_op(current_fh
,
2894 CHECK_FH
| LOCK_STATE
,
2895 &locku
->lu_stateowner
, &stp
, NULL
)))
2898 filp
= stp
->st_vfs_file
;
2900 locks_init_lock(&file_lock
);
2901 file_lock
.fl_type
= F_UNLCK
;
2902 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
2903 file_lock
.fl_pid
= current
->tgid
;
2904 file_lock
.fl_file
= filp
;
2905 file_lock
.fl_flags
= FL_POSIX
;
2906 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
2907 file_lock
.fl_start
= locku
->lu_offset
;
2909 if ((locku
->lu_length
== ~(u64
)0) || LOFF_OVERFLOW(locku
->lu_offset
, locku
->lu_length
))
2910 file_lock
.fl_end
= ~(u64
)0;
2912 file_lock
.fl_end
= locku
->lu_offset
+ locku
->lu_length
- 1;
2913 nfs4_transform_lock_offset(&file_lock
);
2916 * Try to unlock the file in the VFS.
2918 status
= posix_lock_file(filp
, &file_lock
);
2920 dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2924 * OK, unlock succeeded; the only thing left to do is update the stateid.
2926 update_stateid(&stp
->st_stateid
);
2927 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2930 if (locku
->lu_stateowner
) {
2931 nfs4_get_stateowner(locku
->lu_stateowner
);
2932 *replay_owner
= locku
->lu_stateowner
;
2934 nfs4_unlock_state();
2938 status
= nfserrno(status
);
2944 * 1: locks held by lockowner
2945 * 0: no locks held by lockowner
2948 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
2950 struct file_lock
**flpp
;
2951 struct inode
*inode
= filp
->f_dentry
->d_inode
;
2955 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
2956 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
2967 nfsd4_release_lockowner(struct svc_rqst
*rqstp
, struct nfsd4_release_lockowner
*rlockowner
)
2969 clientid_t
*clid
= &rlockowner
->rl_clientid
;
2970 struct nfs4_stateowner
*sop
;
2971 struct nfs4_stateid
*stp
;
2972 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
2973 struct list_head matches
;
2977 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2978 clid
->cl_boot
, clid
->cl_id
);
2980 /* XXX check for lease expiration */
2982 status
= nfserr_stale_clientid
;
2983 if (STALE_CLIENTID(clid
))
2988 status
= nfserr_locks_held
;
2989 /* XXX: we're doing a linear search through all the lockowners.
2990 * Yipes! For now we'll just hope clients aren't really using
2991 * release_lockowner much, but eventually we have to fix these
2992 * data structures. */
2993 INIT_LIST_HEAD(&matches
);
2994 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
2995 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
2996 if (!cmp_owner_str(sop
, owner
, clid
))
2998 list_for_each_entry(stp
, &sop
->so_stateids
,
3000 if (check_for_locks(stp
->st_vfs_file
, sop
))
3002 /* Note: so_perclient unused for lockowners,
3003 * so it's OK to fool with here. */
3004 list_add(&sop
->so_perclient
, &matches
);
3008 /* Clients probably won't expect us to return with some (but not all)
3009 * of the lockowner state released; so don't release any until all
3010 * have been checked. */
3012 while (!list_empty(&matches
)) {
3013 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
3015 /* unhash_stateowner deletes so_perclient only
3016 * for openowners. */
3017 list_del(&sop
->so_perclient
);
3018 release_stateowner(sop
);
3021 nfs4_unlock_state();
3025 static inline struct nfs4_client_reclaim
*
3028 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3032 nfs4_has_reclaimed_state(const char *name
)
3034 unsigned int strhashval
= clientstr_hashval(name
);
3035 struct nfs4_client
*clp
;
3037 clp
= find_confirmed_client_by_str(name
, strhashval
);
3042 * failure => all reset bets are off, nfserr_no_grace...
3045 nfs4_client_to_reclaim(const char *name
)
3047 unsigned int strhashval
;
3048 struct nfs4_client_reclaim
*crp
= NULL
;
3050 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3051 crp
= alloc_reclaim();
3054 strhashval
= clientstr_hashval(name
);
3055 INIT_LIST_HEAD(&crp
->cr_strhash
);
3056 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3057 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3058 reclaim_str_hashtbl_size
++;
3063 nfs4_release_reclaim(void)
3065 struct nfs4_client_reclaim
*crp
= NULL
;
3068 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3069 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3070 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3071 struct nfs4_client_reclaim
, cr_strhash
);
3072 list_del(&crp
->cr_strhash
);
3074 reclaim_str_hashtbl_size
--;
3077 BUG_ON(reclaim_str_hashtbl_size
);
3081 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3082 static struct nfs4_client_reclaim
*
3083 nfs4_find_reclaim_client(clientid_t
*clid
)
3085 unsigned int strhashval
;
3086 struct nfs4_client
*clp
;
3087 struct nfs4_client_reclaim
*crp
= NULL
;
3090 /* find clientid in conf_id_hashtbl */
3091 clp
= find_confirmed_client(clid
);
3095 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3096 clp
->cl_name
.len
, clp
->cl_name
.data
,
3099 /* find clp->cl_name in reclaim_str_hashtbl */
3100 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3101 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3102 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3110 * Called from OPEN. Look for clientid in reclaim list.
3113 nfs4_check_open_reclaim(clientid_t
*clid
)
3115 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3118 /* initialization to perform at module load time: */
3121 nfs4_state_init(void)
3125 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3126 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3127 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3128 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3129 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3131 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3132 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3134 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3135 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3136 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3138 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3139 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3140 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3142 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3143 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3144 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3146 memset(&onestateid
, ~0, sizeof(stateid_t
));
3147 INIT_LIST_HEAD(&close_lru
);
3148 INIT_LIST_HEAD(&client_lru
);
3149 INIT_LIST_HEAD(&del_recall_lru
);
3150 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++)
3151 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3152 reclaim_str_hashtbl_size
= 0;
3156 nfsd4_load_reboot_recovery_data(void)
3161 nfsd4_init_recdir(user_recovery_dirname
);
3162 status
= nfsd4_recdir_load();
3163 nfs4_unlock_state();
3165 printk("NFSD: Failure reading reboot recovery data\n");
3168 /* initialization to perform when the nfsd service is started: */
3171 __nfs4_state_start(void)
3175 boot_time
= get_seconds();
3176 grace_time
= max(user_lease_time
, lease_time
);
3177 lease_time
= user_lease_time
;
3179 printk("NFSD: starting %ld-second grace period\n", grace_time
);
3180 laundry_wq
= create_singlethread_workqueue("nfsd4");
3181 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
*HZ
);
3185 nfs4_state_start(void)
3191 status
= nfsd4_init_slabs();
3194 nfsd4_load_reboot_recovery_data();
3195 __nfs4_state_start();
3207 nfs4_lease_time(void)
3213 __nfs4_state_shutdown(void)
3216 struct nfs4_client
*clp
= NULL
;
3217 struct nfs4_delegation
*dp
= NULL
;
3218 struct list_head
*pos
, *next
, reaplist
;
3220 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3221 while (!list_empty(&conf_id_hashtbl
[i
])) {
3222 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
3225 while (!list_empty(&unconf_str_hashtbl
[i
])) {
3226 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
3230 INIT_LIST_HEAD(&reaplist
);
3231 spin_lock(&recall_lock
);
3232 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3233 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3234 list_move(&dp
->dl_recall_lru
, &reaplist
);
3236 spin_unlock(&recall_lock
);
3237 list_for_each_safe(pos
, next
, &reaplist
) {
3238 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3239 list_del_init(&dp
->dl_recall_lru
);
3240 unhash_delegation(dp
);
3243 cancel_delayed_work(&laundromat_work
);
3244 nfsd4_shutdown_recdir();
3249 nfs4_state_shutdown(void)
3251 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
3252 destroy_workqueue(laundry_wq
);
3254 nfs4_release_reclaim();
3255 __nfs4_state_shutdown();
3257 nfs4_unlock_state();
3261 nfs4_set_recdir(char *recdir
)
3264 strcpy(user_recovery_dirname
, recdir
);
3265 nfs4_unlock_state();
3269 * Change the NFSv4 recovery directory to recdir.
3272 nfs4_reset_recoverydir(char *recdir
)
3275 struct nameidata nd
;
3277 status
= path_lookup(recdir
, LOOKUP_FOLLOW
, &nd
);
3281 if (S_ISDIR(nd
.dentry
->d_inode
->i_mode
)) {
3282 nfs4_set_recdir(recdir
);
3290 * Called when leasetime is changed.
3292 * The only way the protocol gives us to handle on-the-fly lease changes is to
3293 * simulate a reboot. Instead of doing that, we just wait till the next time
3294 * we start to register any changes in lease time. If the administrator
3295 * really wants to change the lease time *now*, they can go ahead and bring
3296 * nfsd down and then back up again after changing the lease time.
3299 nfs4_reset_lease(time_t leasetime
)
3302 user_lease_time
= leasetime
;