2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/sunrpc/svcauth_gss.h>
41 #include <linux/sunrpc/clnt.h>
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
48 time_t nfsd4_lease
= 90; /* default lease time */
49 time_t nfsd4_grace
= 90;
50 static time_t boot_time
;
51 static u32 current_ownerid
= 1;
52 static u32 current_fileid
= 1;
53 static u32 current_delegid
= 1;
54 static stateid_t zerostateid
; /* bits all 0 */
55 static stateid_t onestateid
; /* bits all 1 */
56 static u64 current_sessionid
= 1;
58 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
59 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
61 /* forward declarations */
62 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
63 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
64 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
65 static void nfs4_set_recdir(char *recdir
);
69 /* Currently used for almost all code touching nfsv4 state: */
70 static DEFINE_MUTEX(client_mutex
);
73 * Currently used for the del_recall_lru and file hash table. In an
74 * effort to decrease the scope of the client_mutex, this spinlock may
75 * eventually cover more:
77 static DEFINE_SPINLOCK(recall_lock
);
79 static struct kmem_cache
*stateowner_slab
= NULL
;
80 static struct kmem_cache
*file_slab
= NULL
;
81 static struct kmem_cache
*stateid_slab
= NULL
;
82 static struct kmem_cache
*deleg_slab
= NULL
;
87 mutex_lock(&client_mutex
);
91 nfs4_unlock_state(void)
93 mutex_unlock(&client_mutex
);
97 opaque_hashval(const void *ptr
, int nbytes
)
99 unsigned char *cptr
= (unsigned char *) ptr
;
109 static struct list_head del_recall_lru
;
112 put_nfs4_file(struct nfs4_file
*fi
)
114 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
115 list_del(&fi
->fi_hash
);
116 spin_unlock(&recall_lock
);
118 kmem_cache_free(file_slab
, fi
);
123 get_nfs4_file(struct nfs4_file
*fi
)
125 atomic_inc(&fi
->fi_ref
);
128 static int num_delegations
;
129 unsigned int max_delegations
;
132 * Open owner state (share locks)
135 /* hash tables for nfs4_stateowner */
136 #define OWNER_HASH_BITS 8
137 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
138 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
140 #define ownerid_hashval(id) \
141 ((id) & OWNER_HASH_MASK)
142 #define ownerstr_hashval(clientid, ownername) \
143 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
145 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
146 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
148 /* hash table for nfs4_file */
149 #define FILE_HASH_BITS 8
150 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
151 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
152 /* hash table for (open)nfs4_stateid */
153 #define STATEID_HASH_BITS 10
154 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
155 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
157 #define file_hashval(x) \
158 hash_ptr(x, FILE_HASH_BITS)
159 #define stateid_hashval(owner_id, file_id) \
160 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
162 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
163 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
165 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
167 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
168 atomic_inc(&fp
->fi_access
[oflag
]);
171 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
173 if (oflag
== O_RDWR
) {
174 __nfs4_file_get_access(fp
, O_RDONLY
);
175 __nfs4_file_get_access(fp
, O_WRONLY
);
177 __nfs4_file_get_access(fp
, oflag
);
180 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
182 if (fp
->fi_fds
[oflag
]) {
183 fput(fp
->fi_fds
[oflag
]);
184 fp
->fi_fds
[oflag
] = NULL
;
188 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
190 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
191 nfs4_file_put_fd(fp
, O_RDWR
);
192 nfs4_file_put_fd(fp
, oflag
);
196 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
198 if (oflag
== O_RDWR
) {
199 __nfs4_file_put_access(fp
, O_RDONLY
);
200 __nfs4_file_put_access(fp
, O_WRONLY
);
202 __nfs4_file_put_access(fp
, oflag
);
205 static struct nfs4_delegation
*
206 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
208 struct nfs4_delegation
*dp
;
209 struct nfs4_file
*fp
= stp
->st_file
;
211 dprintk("NFSD alloc_init_deleg\n");
213 * Major work on the lease subsystem (for example, to support
214 * calbacks on stat) will be required before we can support
215 * write delegations properly.
217 if (type
!= NFS4_OPEN_DELEGATE_READ
)
219 if (fp
->fi_had_conflict
)
221 if (num_delegations
> max_delegations
)
223 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
227 INIT_LIST_HEAD(&dp
->dl_perfile
);
228 INIT_LIST_HEAD(&dp
->dl_perclnt
);
229 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
233 nfs4_file_get_access(fp
, O_RDONLY
);
236 dp
->dl_stateid
.si_boot
= boot_time
;
237 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
238 dp
->dl_stateid
.si_fileid
= 0;
239 dp
->dl_stateid
.si_generation
= 0;
240 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
242 atomic_set(&dp
->dl_count
, 1);
243 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
244 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
245 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
250 nfs4_put_delegation(struct nfs4_delegation
*dp
)
252 if (atomic_dec_and_test(&dp
->dl_count
)) {
253 dprintk("NFSD: freeing dp %p\n",dp
);
254 put_nfs4_file(dp
->dl_file
);
255 kmem_cache_free(deleg_slab
, dp
);
260 /* Remove the associated file_lock first, then remove the delegation.
261 * lease_modify() is called to remove the FS_LEASE file_lock from
262 * the i_flock list, eventually calling nfsd's lock_manager
263 * fl_release_callback.
266 nfs4_close_delegation(struct nfs4_delegation
*dp
)
268 struct file
*filp
= find_readable_file(dp
->dl_file
);
270 dprintk("NFSD: close_delegation dp %p\n",dp
);
272 vfs_setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
273 nfs4_file_put_access(dp
->dl_file
, O_RDONLY
);
276 /* Called under the state lock. */
278 unhash_delegation(struct nfs4_delegation
*dp
)
280 list_del_init(&dp
->dl_perfile
);
281 list_del_init(&dp
->dl_perclnt
);
282 spin_lock(&recall_lock
);
283 list_del_init(&dp
->dl_recall_lru
);
284 spin_unlock(&recall_lock
);
285 nfs4_close_delegation(dp
);
286 nfs4_put_delegation(dp
);
293 /* client_lock protects the client lru list and session hash table */
294 static DEFINE_SPINLOCK(client_lock
);
296 /* Hash tables for nfs4_clientid state */
297 #define CLIENT_HASH_BITS 4
298 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
299 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
301 #define clientid_hashval(id) \
302 ((id) & CLIENT_HASH_MASK)
303 #define clientstr_hashval(name) \
304 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
306 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
307 * used in reboot/reset lease grace period processing
309 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
310 * setclientid_confirmed info.
312 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
315 * client_lru holds client queue ordered by nfs4_client.cl_time
318 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
319 * for last close replay.
321 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
322 static int reclaim_str_hashtbl_size
= 0;
323 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
324 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
325 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
326 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
327 static struct list_head client_lru
;
328 static struct list_head close_lru
;
330 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
332 list_del(&stp
->st_hash
);
333 list_del(&stp
->st_perfile
);
334 list_del(&stp
->st_perstateowner
);
337 static void free_generic_stateid(struct nfs4_stateid
*stp
)
339 put_nfs4_file(stp
->st_file
);
340 kmem_cache_free(stateid_slab
, stp
);
343 static void release_lock_stateid(struct nfs4_stateid
*stp
)
347 unhash_generic_stateid(stp
);
348 file
= find_any_file(stp
->st_file
);
350 locks_remove_posix(file
, (fl_owner_t
)stp
->st_stateowner
);
351 free_generic_stateid(stp
);
354 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
356 struct nfs4_stateid
*stp
;
358 list_del(&sop
->so_idhash
);
359 list_del(&sop
->so_strhash
);
360 list_del(&sop
->so_perstateid
);
361 while (!list_empty(&sop
->so_stateids
)) {
362 stp
= list_first_entry(&sop
->so_stateids
,
363 struct nfs4_stateid
, st_perstateowner
);
364 release_lock_stateid(stp
);
368 static void release_lockowner(struct nfs4_stateowner
*sop
)
370 unhash_lockowner(sop
);
371 nfs4_put_stateowner(sop
);
375 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
377 struct nfs4_stateowner
*lock_sop
;
379 while (!list_empty(&open_stp
->st_lockowners
)) {
380 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
381 struct nfs4_stateowner
, so_perstateid
);
382 /* list_del(&open_stp->st_lockowners); */
383 BUG_ON(lock_sop
->so_is_open_owner
);
384 release_lockowner(lock_sop
);
389 * We store the NONE, READ, WRITE, and BOTH bits separately in the
390 * st_{access,deny}_bmap field of the stateid, in order to track not
391 * only what share bits are currently in force, but also what
392 * combinations of share bits previous opens have used. This allows us
393 * to enforce the recommendation of rfc 3530 14.2.19 that the server
394 * return an error if the client attempt to downgrade to a combination
395 * of share bits not explicable by closing some of its previous opens.
397 * XXX: This enforcement is actually incomplete, since we don't keep
398 * track of access/deny bit combinations; so, e.g., we allow:
400 * OPEN allow read, deny write
401 * OPEN allow both, deny none
402 * DOWNGRADE allow read, deny none
404 * which we should reject.
407 set_access(unsigned int *access
, unsigned long bmap
) {
411 for (i
= 1; i
< 4; i
++) {
412 if (test_bit(i
, &bmap
))
418 set_deny(unsigned int *deny
, unsigned long bmap
) {
422 for (i
= 0; i
< 4; i
++) {
423 if (test_bit(i
, &bmap
))
429 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
430 unsigned int access
, deny
;
432 set_access(&access
, stp
->st_access_bmap
);
433 set_deny(&deny
, stp
->st_deny_bmap
);
434 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
439 static int nfs4_access_to_omode(u32 access
)
441 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
442 case NFS4_SHARE_ACCESS_READ
:
444 case NFS4_SHARE_ACCESS_WRITE
:
446 case NFS4_SHARE_ACCESS_BOTH
:
452 static int nfs4_access_bmap_to_omode(struct nfs4_stateid
*stp
)
456 set_access(&access
, stp
->st_access_bmap
);
457 return nfs4_access_to_omode(access
);
460 static void release_open_stateid(struct nfs4_stateid
*stp
)
462 int oflag
= nfs4_access_bmap_to_omode(stp
);
464 unhash_generic_stateid(stp
);
465 release_stateid_lockowners(stp
);
466 nfs4_file_put_access(stp
->st_file
, oflag
);
467 free_generic_stateid(stp
);
470 static void unhash_openowner(struct nfs4_stateowner
*sop
)
472 struct nfs4_stateid
*stp
;
474 list_del(&sop
->so_idhash
);
475 list_del(&sop
->so_strhash
);
476 list_del(&sop
->so_perclient
);
477 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
478 while (!list_empty(&sop
->so_stateids
)) {
479 stp
= list_first_entry(&sop
->so_stateids
,
480 struct nfs4_stateid
, st_perstateowner
);
481 release_open_stateid(stp
);
485 static void release_openowner(struct nfs4_stateowner
*sop
)
487 unhash_openowner(sop
);
488 list_del(&sop
->so_close_lru
);
489 nfs4_put_stateowner(sop
);
492 #define SESSION_HASH_SIZE 512
493 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
496 hash_sessionid(struct nfs4_sessionid
*sessionid
)
498 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
500 return sid
->sequence
% SESSION_HASH_SIZE
;
504 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
506 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
507 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
511 gen_sessionid(struct nfsd4_session
*ses
)
513 struct nfs4_client
*clp
= ses
->se_client
;
514 struct nfsd4_sessionid
*sid
;
516 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
517 sid
->clientid
= clp
->cl_clientid
;
518 sid
->sequence
= current_sessionid
++;
523 * The protocol defines ca_maxresponssize_cached to include the size of
524 * the rpc header, but all we need to cache is the data starting after
525 * the end of the initial SEQUENCE operation--the rest we regenerate
526 * each time. Therefore we can advertise a ca_maxresponssize_cached
527 * value that is the number of bytes in our cache plus a few additional
528 * bytes. In order to stay on the safe side, and not promise more than
529 * we can cache, those additional bytes must be the minimum possible: 24
530 * bytes of rpc header (xid through accept state, with AUTH_NULL
531 * verifier), 12 for the compound header (with zero-length tag), and 44
532 * for the SEQUENCE op response:
534 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
537 free_session_slots(struct nfsd4_session
*ses
)
541 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
542 kfree(ses
->se_slots
[i
]);
546 * We don't actually need to cache the rpc and session headers, so we
547 * can allocate a little less for each slot:
549 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
551 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
554 static int nfsd4_sanitize_slot_size(u32 size
)
556 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
557 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
563 * XXX: If we run out of reserved DRC memory we could (up to a point)
564 * re-negotiate active sessions and reduce their slot usage to make
565 * rooom for new connections. For now we just fail the create session.
567 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
571 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
573 spin_lock(&nfsd_drc_lock
);
574 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
575 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
576 num
= min_t(int, num
, avail
/ slotsize
);
577 nfsd_drc_mem_used
+= num
* slotsize
;
578 spin_unlock(&nfsd_drc_lock
);
583 static void nfsd4_put_drc_mem(int slotsize
, int num
)
585 spin_lock(&nfsd_drc_lock
);
586 nfsd_drc_mem_used
-= slotsize
* num
;
587 spin_unlock(&nfsd_drc_lock
);
590 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
592 struct nfsd4_session
*new;
595 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
596 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
597 mem
= numslots
* sizeof(struct nfsd4_slot
*);
599 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
602 /* allocate each struct nfsd4_slot and data cache in one piece */
603 for (i
= 0; i
< numslots
; i
++) {
604 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
605 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
606 if (!new->se_slots
[i
])
612 kfree(new->se_slots
[i
]);
617 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
619 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
621 new->maxreqs
= numslots
;
622 new->maxresp_cached
= slotsize
+ NFSD_MIN_HDR_SEQ_SZ
;
623 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
624 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
625 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
628 static void free_conn(struct nfsd4_conn
*c
)
630 svc_xprt_put(c
->cn_xprt
);
634 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
636 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
637 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
639 spin_lock(&clp
->cl_lock
);
640 if (!list_empty(&c
->cn_persession
)) {
641 list_del(&c
->cn_persession
);
644 spin_unlock(&clp
->cl_lock
);
647 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
649 struct nfsd4_conn
*conn
;
651 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
654 svc_xprt_get(rqstp
->rq_xprt
);
655 conn
->cn_xprt
= rqstp
->rq_xprt
;
656 conn
->cn_flags
= flags
;
657 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
661 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
663 conn
->cn_session
= ses
;
664 list_add(&conn
->cn_persession
, &ses
->se_conns
);
667 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
669 struct nfs4_client
*clp
= ses
->se_client
;
671 spin_lock(&clp
->cl_lock
);
672 __nfsd4_hash_conn(conn
, ses
);
673 spin_unlock(&clp
->cl_lock
);
676 static void nfsd4_register_conn(struct nfsd4_conn
*conn
)
678 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
679 register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
682 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
684 struct nfsd4_conn
*conn
;
685 u32 flags
= NFS4_CDFC4_FORE
;
687 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
688 flags
|= NFS4_CDFC4_BACK
;
689 conn
= alloc_conn(rqstp
, flags
);
691 return nfserr_jukebox
;
692 nfsd4_hash_conn(conn
, ses
);
693 nfsd4_register_conn(conn
);
697 static void nfsd4_del_conns(struct nfsd4_session
*s
)
699 struct nfs4_client
*clp
= s
->se_client
;
700 struct nfsd4_conn
*c
;
702 spin_lock(&clp
->cl_lock
);
703 while (!list_empty(&s
->se_conns
)) {
704 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
705 list_del_init(&c
->cn_persession
);
706 spin_unlock(&clp
->cl_lock
);
708 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
711 spin_lock(&clp
->cl_lock
);
713 spin_unlock(&clp
->cl_lock
);
716 void free_session(struct kref
*kref
)
718 struct nfsd4_session
*ses
;
721 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
722 nfsd4_del_conns(ses
);
723 spin_lock(&nfsd_drc_lock
);
724 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
725 nfsd_drc_mem_used
-= mem
;
726 spin_unlock(&nfsd_drc_lock
);
727 free_session_slots(ses
);
731 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
733 struct nfsd4_session
*new;
734 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
735 int numslots
, slotsize
;
740 * Note decreasing slot size below client's request may
741 * make it difficult for client to function correctly, whereas
742 * decreasing the number of slots will (just?) affect
743 * performance. When short on memory we therefore prefer to
744 * decrease number of slots instead of their size.
746 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
747 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
749 new = alloc_session(slotsize
, numslots
);
751 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
754 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
756 new->se_client
= clp
;
759 INIT_LIST_HEAD(&new->se_conns
);
761 new->se_cb_seq_nr
= 1;
762 new->se_flags
= cses
->flags
;
763 new->se_cb_prog
= cses
->callback_prog
;
764 kref_init(&new->se_ref
);
765 idx
= hash_sessionid(&new->se_sessionid
);
766 spin_lock(&client_lock
);
767 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
768 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
769 spin_unlock(&client_lock
);
771 status
= nfsd4_new_conn(rqstp
, new);
772 /* whoops: benny points out, status is ignored! (err, or bogus) */
774 free_session(&new->se_ref
);
777 if (!clp
->cl_cb_session
&& (cses
->flags
& SESSION4_BACK_CHAN
)) {
778 struct sockaddr
*sa
= svc_addr(rqstp
);
780 clp
->cl_cb_session
= new;
781 clp
->cl_cb_conn
.cb_xprt
= rqstp
->rq_xprt
;
782 svc_xprt_get(rqstp
->rq_xprt
);
783 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
784 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
785 nfsd4_probe_callback(clp
);
790 /* caller must hold client_lock */
791 static struct nfsd4_session
*
792 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
794 struct nfsd4_session
*elem
;
797 dump_sessionid(__func__
, sessionid
);
798 idx
= hash_sessionid(sessionid
);
799 /* Search in the appropriate list */
800 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
801 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
802 NFS4_MAX_SESSIONID_LEN
)) {
807 dprintk("%s: session not found\n", __func__
);
811 /* caller must hold client_lock */
813 unhash_session(struct nfsd4_session
*ses
)
815 list_del(&ses
->se_hash
);
816 list_del(&ses
->se_perclnt
);
819 /* must be called under the client_lock */
821 renew_client_locked(struct nfs4_client
*clp
)
823 if (is_client_expired(clp
)) {
824 dprintk("%s: client (clientid %08x/%08x) already expired\n",
826 clp
->cl_clientid
.cl_boot
,
827 clp
->cl_clientid
.cl_id
);
832 * Move client to the end to the LRU list.
834 dprintk("renewing client (clientid %08x/%08x)\n",
835 clp
->cl_clientid
.cl_boot
,
836 clp
->cl_clientid
.cl_id
);
837 list_move_tail(&clp
->cl_lru
, &client_lru
);
838 clp
->cl_time
= get_seconds();
842 renew_client(struct nfs4_client
*clp
)
844 spin_lock(&client_lock
);
845 renew_client_locked(clp
);
846 spin_unlock(&client_lock
);
849 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
851 STALE_CLIENTID(clientid_t
*clid
)
853 if (clid
->cl_boot
== boot_time
)
855 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
856 clid
->cl_boot
, clid
->cl_id
, boot_time
);
861 * XXX Should we use a slab cache ?
862 * This type of memory management is somewhat inefficient, but we use it
863 * anyway since SETCLIENTID is not a common operation.
865 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
867 struct nfs4_client
*clp
;
869 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
872 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
873 if (clp
->cl_name
.data
== NULL
) {
877 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
878 clp
->cl_name
.len
= name
.len
;
883 free_client(struct nfs4_client
*clp
)
885 while (!list_empty(&clp
->cl_sessions
)) {
886 struct nfsd4_session
*ses
;
887 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
889 list_del(&ses
->se_perclnt
);
890 nfsd4_put_session(ses
);
892 if (clp
->cl_cred
.cr_group_info
)
893 put_group_info(clp
->cl_cred
.cr_group_info
);
894 kfree(clp
->cl_principal
);
895 kfree(clp
->cl_name
.data
);
900 release_session_client(struct nfsd4_session
*session
)
902 struct nfs4_client
*clp
= session
->se_client
;
904 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
906 if (is_client_expired(clp
)) {
908 session
->se_client
= NULL
;
910 renew_client_locked(clp
);
911 spin_unlock(&client_lock
);
914 /* must be called under the client_lock */
916 unhash_client_locked(struct nfs4_client
*clp
)
918 struct nfsd4_session
*ses
;
920 mark_client_expired(clp
);
921 list_del(&clp
->cl_lru
);
922 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
923 list_del_init(&ses
->se_hash
);
927 expire_client(struct nfs4_client
*clp
)
929 struct nfs4_stateowner
*sop
;
930 struct nfs4_delegation
*dp
;
931 struct list_head reaplist
;
933 INIT_LIST_HEAD(&reaplist
);
934 spin_lock(&recall_lock
);
935 while (!list_empty(&clp
->cl_delegations
)) {
936 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
937 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
939 list_del_init(&dp
->dl_perclnt
);
940 list_move(&dp
->dl_recall_lru
, &reaplist
);
942 spin_unlock(&recall_lock
);
943 while (!list_empty(&reaplist
)) {
944 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
945 list_del_init(&dp
->dl_recall_lru
);
946 unhash_delegation(dp
);
948 while (!list_empty(&clp
->cl_openowners
)) {
949 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
950 release_openowner(sop
);
952 nfsd4_shutdown_callback(clp
);
953 if (clp
->cl_cb_conn
.cb_xprt
)
954 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
955 list_del(&clp
->cl_idhash
);
956 list_del(&clp
->cl_strhash
);
957 spin_lock(&client_lock
);
958 unhash_client_locked(clp
);
959 if (atomic_read(&clp
->cl_refcount
) == 0)
961 spin_unlock(&client_lock
);
964 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
966 memcpy(target
->cl_verifier
.data
, source
->data
,
967 sizeof(target
->cl_verifier
.data
));
970 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
972 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
973 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
976 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
978 target
->cr_uid
= source
->cr_uid
;
979 target
->cr_gid
= source
->cr_gid
;
980 target
->cr_group_info
= source
->cr_group_info
;
981 get_group_info(target
->cr_group_info
);
984 static int same_name(const char *n1
, const char *n2
)
986 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
990 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
992 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
996 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
998 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1001 /* XXX what about NGROUP */
1003 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1005 return cr1
->cr_uid
== cr2
->cr_uid
;
1008 static void gen_clid(struct nfs4_client
*clp
)
1010 static u32 current_clientid
= 1;
1012 clp
->cl_clientid
.cl_boot
= boot_time
;
1013 clp
->cl_clientid
.cl_id
= current_clientid
++;
1016 static void gen_confirm(struct nfs4_client
*clp
)
1021 p
= (u32
*)clp
->cl_confirm
.data
;
1022 *p
++ = get_seconds();
1026 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1027 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1029 struct nfs4_client
*clp
;
1030 struct sockaddr
*sa
= svc_addr(rqstp
);
1033 clp
= alloc_client(name
);
1037 INIT_LIST_HEAD(&clp
->cl_sessions
);
1039 princ
= svc_gss_principal(rqstp
);
1041 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1042 if (clp
->cl_principal
== NULL
) {
1048 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1049 atomic_set(&clp
->cl_refcount
, 0);
1050 atomic_set(&clp
->cl_cb_set
, 0);
1051 INIT_LIST_HEAD(&clp
->cl_idhash
);
1052 INIT_LIST_HEAD(&clp
->cl_strhash
);
1053 INIT_LIST_HEAD(&clp
->cl_openowners
);
1054 INIT_LIST_HEAD(&clp
->cl_delegations
);
1055 INIT_LIST_HEAD(&clp
->cl_lru
);
1056 spin_lock_init(&clp
->cl_lock
);
1057 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1058 clp
->cl_time
= get_seconds();
1059 clear_bit(0, &clp
->cl_cb_slot_busy
);
1060 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1061 copy_verf(clp
, verf
);
1062 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1063 clp
->cl_flavor
= rqstp
->rq_flavor
;
1064 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1066 clp
->cl_cb_session
= NULL
;
1070 static int check_name(struct xdr_netobj name
)
1074 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1075 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1082 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1084 unsigned int idhashval
;
1086 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1087 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1088 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1093 move_to_confirmed(struct nfs4_client
*clp
)
1095 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1096 unsigned int strhashval
;
1098 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1099 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1100 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1101 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1105 static struct nfs4_client
*
1106 find_confirmed_client(clientid_t
*clid
)
1108 struct nfs4_client
*clp
;
1109 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1111 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1112 if (same_clid(&clp
->cl_clientid
, clid
))
1118 static struct nfs4_client
*
1119 find_unconfirmed_client(clientid_t
*clid
)
1121 struct nfs4_client
*clp
;
1122 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1124 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1125 if (same_clid(&clp
->cl_clientid
, clid
))
1132 * Return 1 iff clp's clientid establishment method matches the use_exchange_id
1133 * parameter. Matching is based on the fact the at least one of the
1134 * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1
1136 * FIXME: we need to unify the clientid namespaces for nfsv4.x
1137 * and correctly deal with client upgrade/downgrade in EXCHANGE_ID
1138 * and SET_CLIENTID{,_CONFIRM}
1141 match_clientid_establishment(struct nfs4_client
*clp
, bool use_exchange_id
)
1143 bool has_exchange_flags
= (clp
->cl_exchange_flags
!= 0);
1144 return use_exchange_id
== has_exchange_flags
;
1147 static struct nfs4_client
*
1148 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
,
1149 bool use_exchange_id
)
1151 struct nfs4_client
*clp
;
1153 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1154 if (same_name(clp
->cl_recdir
, dname
) &&
1155 match_clientid_establishment(clp
, use_exchange_id
))
1161 static struct nfs4_client
*
1162 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
,
1163 bool use_exchange_id
)
1165 struct nfs4_client
*clp
;
1167 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1168 if (same_name(clp
->cl_recdir
, dname
) &&
1169 match_clientid_establishment(clp
, use_exchange_id
))
1176 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, u32 scopeid
)
1178 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1179 unsigned short expected_family
;
1181 /* Currently, we only support tcp and tcp6 for the callback channel */
1182 if (se
->se_callback_netid_len
== 3 &&
1183 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1184 expected_family
= AF_INET
;
1185 else if (se
->se_callback_netid_len
== 4 &&
1186 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1187 expected_family
= AF_INET6
;
1191 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1192 se
->se_callback_addr_len
,
1193 (struct sockaddr
*)&conn
->cb_addr
,
1194 sizeof(conn
->cb_addr
));
1196 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1199 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1200 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1202 conn
->cb_prog
= se
->se_callback_prog
;
1203 conn
->cb_ident
= se
->se_callback_ident
;
1206 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1207 conn
->cb_addrlen
= 0;
1208 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1209 "will not receive delegations\n",
1210 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1216 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1219 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1221 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1224 dprintk("--> %s slot %p\n", __func__
, slot
);
1226 slot
->sl_opcnt
= resp
->opcnt
;
1227 slot
->sl_status
= resp
->cstate
.status
;
1229 if (nfsd4_not_cached(resp
)) {
1230 slot
->sl_datalen
= 0;
1233 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1234 base
= (char *)resp
->cstate
.datap
-
1235 (char *)resp
->xbuf
->head
[0].iov_base
;
1236 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1238 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1243 * Encode the replay sequence operation from the slot values.
1244 * If cachethis is FALSE encode the uncached rep error on the next
1245 * operation which sets resp->p and increments resp->opcnt for
1246 * nfs4svc_encode_compoundres.
1250 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1251 struct nfsd4_compoundres
*resp
)
1253 struct nfsd4_op
*op
;
1254 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1256 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1257 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1259 /* Encode the replayed sequence operation */
1260 op
= &args
->ops
[resp
->opcnt
- 1];
1261 nfsd4_encode_operation(resp
, op
);
1263 /* Return nfserr_retry_uncached_rep in next operation. */
1264 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1265 op
= &args
->ops
[resp
->opcnt
++];
1266 op
->status
= nfserr_retry_uncached_rep
;
1267 nfsd4_encode_operation(resp
, op
);
1273 * The sequence operation is not cached because we can use the slot and
1277 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1278 struct nfsd4_sequence
*seq
)
1280 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1283 dprintk("--> %s slot %p\n", __func__
, slot
);
1285 /* Either returns 0 or nfserr_retry_uncached */
1286 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1287 if (status
== nfserr_retry_uncached_rep
)
1290 /* The sequence operation has been encoded, cstate->datap set. */
1291 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1293 resp
->opcnt
= slot
->sl_opcnt
;
1294 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1295 status
= slot
->sl_status
;
1301 * Set the exchange_id flags returned by the server.
1304 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1306 /* pNFS is not supported */
1307 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1309 /* Referrals are supported, Migration is not. */
1310 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1312 /* set the wire flags to return to client. */
1313 clid
->flags
= new->cl_exchange_flags
;
1317 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1318 struct nfsd4_compound_state
*cstate
,
1319 struct nfsd4_exchange_id
*exid
)
1321 struct nfs4_client
*unconf
, *conf
, *new;
1323 unsigned int strhashval
;
1324 char dname
[HEXDIR_LEN
];
1325 char addr_str
[INET6_ADDRSTRLEN
];
1326 nfs4_verifier verf
= exid
->verifier
;
1327 struct sockaddr
*sa
= svc_addr(rqstp
);
1329 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1330 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1331 "ip_addr=%s flags %x, spa_how %d\n",
1332 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1333 addr_str
, exid
->flags
, exid
->spa_how
);
1335 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1336 return nfserr_inval
;
1338 /* Currently only support SP4_NONE */
1339 switch (exid
->spa_how
) {
1343 return nfserr_encr_alg_unsupp
;
1345 BUG(); /* checked by xdr code */
1347 return nfserr_serverfault
; /* no excuse :-/ */
1350 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1355 strhashval
= clientstr_hashval(dname
);
1360 conf
= find_confirmed_client_by_str(dname
, strhashval
, true);
1362 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1363 /* 18.35.4 case 8 */
1364 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1365 status
= nfserr_not_same
;
1368 /* Client reboot: destroy old state */
1369 expire_client(conf
);
1372 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1373 /* 18.35.4 case 9 */
1374 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1375 status
= nfserr_perm
;
1378 expire_client(conf
);
1382 * Set bit when the owner id and verifier map to an already
1383 * confirmed client id (18.35.3).
1385 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1388 * Falling into 18.35.4 case 2, possible router replay.
1389 * Leave confirmed record intact and return same result.
1391 copy_verf(conf
, &verf
);
1396 /* 18.35.4 case 7 */
1397 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1398 status
= nfserr_noent
;
1402 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, true);
1405 * Possible retry or client restart. Per 18.35.4 case 4,
1406 * a new unconfirmed record should be generated regardless
1407 * of whether any properties have changed.
1409 expire_client(unconf
);
1414 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1416 status
= nfserr_jukebox
;
1421 add_to_unconfirmed(new, strhashval
);
1423 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1424 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1427 nfsd4_set_ex_flags(new, exid
);
1429 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1430 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1434 nfs4_unlock_state();
1436 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1441 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1443 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1446 /* The slot is in use, and no response has been sent. */
1448 if (seqid
== slot_seqid
)
1449 return nfserr_jukebox
;
1451 return nfserr_seq_misordered
;
1454 if (likely(seqid
== slot_seqid
+ 1))
1457 if (seqid
== slot_seqid
)
1458 return nfserr_replay_cache
;
1460 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1462 /* Misordered replay or misordered new request */
1463 return nfserr_seq_misordered
;
1467 * Cache the create session result into the create session single DRC
1468 * slot cache by saving the xdr structure. sl_seqid has been set.
1469 * Do this for solo or embedded create session operations.
1472 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1473 struct nfsd4_clid_slot
*slot
, int nfserr
)
1475 slot
->sl_status
= nfserr
;
1476 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1480 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1481 struct nfsd4_clid_slot
*slot
)
1483 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1484 return slot
->sl_status
;
1488 nfsd4_create_session(struct svc_rqst
*rqstp
,
1489 struct nfsd4_compound_state
*cstate
,
1490 struct nfsd4_create_session
*cr_ses
)
1492 struct sockaddr
*sa
= svc_addr(rqstp
);
1493 struct nfs4_client
*conf
, *unconf
;
1494 struct nfsd4_session
*new;
1495 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1496 bool confirm_me
= false;
1500 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1501 conf
= find_confirmed_client(&cr_ses
->clientid
);
1504 cs_slot
= &conf
->cl_cs_slot
;
1505 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1506 if (status
== nfserr_replay_cache
) {
1507 dprintk("Got a create_session replay! seqid= %d\n",
1509 /* Return the cached reply status */
1510 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1512 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1513 status
= nfserr_seq_misordered
;
1514 dprintk("Sequence misordered!\n");
1515 dprintk("Expected seqid= %d but got seqid= %d\n",
1516 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1519 } else if (unconf
) {
1520 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1521 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1522 status
= nfserr_clid_inuse
;
1526 cs_slot
= &unconf
->cl_cs_slot
;
1527 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1529 /* an unconfirmed replay returns misordered */
1530 status
= nfserr_seq_misordered
;
1537 status
= nfserr_stale_clientid
;
1542 * XXX: we should probably set this at creation time, and check
1543 * for consistent minorversion use throughout:
1545 conf
->cl_minorversion
= 1;
1547 * We do not support RDMA or persistent sessions
1549 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1550 cr_ses
->flags
&= ~SESSION4_RDMA
;
1552 status
= nfserr_jukebox
;
1553 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1557 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1558 NFS4_MAX_SESSIONID_LEN
);
1559 cs_slot
->sl_seqid
++;
1560 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1562 /* cache solo and embedded create sessions under the state lock */
1563 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1565 move_to_confirmed(conf
);
1567 nfs4_unlock_state();
1568 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1572 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1574 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1575 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1577 return argp
->opcnt
== resp
->opcnt
;
1580 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1584 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1588 nfsd4_destroy_session(struct svc_rqst
*r
,
1589 struct nfsd4_compound_state
*cstate
,
1590 struct nfsd4_destroy_session
*sessionid
)
1592 struct nfsd4_session
*ses
;
1593 u32 status
= nfserr_badsession
;
1596 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1597 * - Should we return nfserr_back_chan_busy if waiting for
1598 * callbacks on to-be-destroyed session?
1599 * - Do we need to clear any callback info from previous session?
1602 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1603 if (!nfsd4_last_compound_op(r
))
1604 return nfserr_not_only_op
;
1606 dump_sessionid(__func__
, &sessionid
->sessionid
);
1607 spin_lock(&client_lock
);
1608 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1610 spin_unlock(&client_lock
);
1614 unhash_session(ses
);
1615 spin_unlock(&client_lock
);
1618 /* wait for callbacks */
1619 nfsd4_shutdown_callback(ses
->se_client
);
1620 nfs4_unlock_state();
1622 nfsd4_del_conns(ses
);
1624 nfsd4_put_session(ses
);
1627 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1631 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1633 struct nfsd4_conn
*c
;
1635 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1636 if (c
->cn_xprt
== xpt
) {
1643 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1645 struct nfs4_client
*clp
= ses
->se_client
;
1646 struct nfsd4_conn
*c
;
1648 spin_lock(&clp
->cl_lock
);
1649 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1651 spin_unlock(&clp
->cl_lock
);
1655 __nfsd4_hash_conn(new, ses
);
1656 spin_unlock(&clp
->cl_lock
);
1657 nfsd4_register_conn(new);
1662 nfsd4_sequence(struct svc_rqst
*rqstp
,
1663 struct nfsd4_compound_state
*cstate
,
1664 struct nfsd4_sequence
*seq
)
1666 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1667 struct nfsd4_session
*session
;
1668 struct nfsd4_slot
*slot
;
1669 struct nfsd4_conn
*conn
;
1672 if (resp
->opcnt
!= 1)
1673 return nfserr_sequence_pos
;
1676 * Will be either used or freed by nfsd4_sequence_check_conn
1679 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1681 return nfserr_jukebox
;
1683 spin_lock(&client_lock
);
1684 status
= nfserr_badsession
;
1685 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1689 status
= nfserr_badslot
;
1690 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1693 slot
= session
->se_slots
[seq
->slotid
];
1694 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1696 /* We do not negotiate the number of slots yet, so set the
1697 * maxslots to the session maxreqs which is used to encode
1698 * sr_highest_slotid and the sr_target_slot id to maxslots */
1699 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1701 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1702 if (status
== nfserr_replay_cache
) {
1703 cstate
->slot
= slot
;
1704 cstate
->session
= session
;
1705 /* Return the cached reply status and set cstate->status
1706 * for nfsd4_proc_compound processing */
1707 status
= nfsd4_replay_cache_entry(resp
, seq
);
1708 cstate
->status
= nfserr_replay_cache
;
1714 nfsd4_sequence_check_conn(conn
, session
);
1717 /* Success! bump slot seqid */
1718 slot
->sl_inuse
= true;
1719 slot
->sl_seqid
= seq
->seqid
;
1720 slot
->sl_cachethis
= seq
->cachethis
;
1722 cstate
->slot
= slot
;
1723 cstate
->session
= session
;
1726 /* Hold a session reference until done processing the compound. */
1727 if (cstate
->session
) {
1728 nfsd4_get_session(cstate
->session
);
1729 atomic_inc(&session
->se_client
->cl_refcount
);
1732 spin_unlock(&client_lock
);
1733 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1738 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1740 if (rc
->rca_one_fs
) {
1741 if (!cstate
->current_fh
.fh_dentry
)
1742 return nfserr_nofilehandle
;
1744 * We don't take advantage of the rca_one_fs case.
1745 * That's OK, it's optional, we can safely ignore it.
1750 if (is_client_expired(cstate
->session
->se_client
)) {
1751 nfs4_unlock_state();
1753 * The following error isn't really legal.
1754 * But we only get here if the client just explicitly
1755 * destroyed the client. Surely it no longer cares what
1756 * error it gets back on an operation for the dead
1759 return nfserr_stale_clientid
;
1761 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1762 nfs4_unlock_state();
1767 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1768 struct nfsd4_setclientid
*setclid
)
1770 struct sockaddr
*sa
= svc_addr(rqstp
);
1771 struct xdr_netobj clname
= {
1772 .len
= setclid
->se_namelen
,
1773 .data
= setclid
->se_name
,
1775 nfs4_verifier clverifier
= setclid
->se_verf
;
1776 unsigned int strhashval
;
1777 struct nfs4_client
*conf
, *unconf
, *new;
1779 char dname
[HEXDIR_LEN
];
1781 if (!check_name(clname
))
1782 return nfserr_inval
;
1784 status
= nfs4_make_rec_clidname(dname
, &clname
);
1789 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1790 * We get here on a DRC miss.
1793 strhashval
= clientstr_hashval(dname
);
1796 conf
= find_confirmed_client_by_str(dname
, strhashval
, false);
1798 /* RFC 3530 14.2.33 CASE 0: */
1799 status
= nfserr_clid_inuse
;
1800 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1801 char addr_str
[INET6_ADDRSTRLEN
];
1802 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1804 dprintk("NFSD: setclientid: string in use by client "
1805 "at %s\n", addr_str
);
1810 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1811 * has a description of SETCLIENTID request processing consisting
1812 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1814 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, false);
1815 status
= nfserr_resource
;
1818 * RFC 3530 14.2.33 CASE 4:
1819 * placed first, because it is the normal case
1822 expire_client(unconf
);
1823 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1827 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1829 * RFC 3530 14.2.33 CASE 1:
1830 * probable callback update
1833 /* Note this is removing unconfirmed {*x***},
1834 * which is stronger than RFC recommended {vxc**}.
1835 * This has the advantage that there is at most
1836 * one {*x***} in either list at any time.
1838 expire_client(unconf
);
1840 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1843 copy_clid(new, conf
);
1844 } else if (!unconf
) {
1846 * RFC 3530 14.2.33 CASE 2:
1847 * probable client reboot; state will be removed if
1850 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1856 * RFC 3530 14.2.33 CASE 3:
1857 * probable client reboot; state will be removed if
1860 expire_client(unconf
);
1861 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1867 * XXX: we should probably set this at creation time, and check
1868 * for consistent minorversion use throughout:
1870 new->cl_minorversion
= 0;
1871 gen_callback(new, setclid
, rpc_get_scope_id(sa
));
1872 add_to_unconfirmed(new, strhashval
);
1873 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1874 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
1875 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
1878 nfs4_unlock_state();
1884 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1885 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1886 * bullets, labeled as CASE1 - CASE4 below.
1889 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
1890 struct nfsd4_compound_state
*cstate
,
1891 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
1893 struct sockaddr
*sa
= svc_addr(rqstp
);
1894 struct nfs4_client
*conf
, *unconf
;
1895 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
1896 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
1899 if (STALE_CLIENTID(clid
))
1900 return nfserr_stale_clientid
;
1902 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1903 * We get here on a DRC miss.
1908 conf
= find_confirmed_client(clid
);
1909 unconf
= find_unconfirmed_client(clid
);
1911 status
= nfserr_clid_inuse
;
1912 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
1914 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
1918 * section 14.2.34 of RFC 3530 has a description of
1919 * SETCLIENTID_CONFIRM request processing consisting
1920 * of 4 bullet points, labeled as CASE1 - CASE4 below.
1922 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
1924 * RFC 3530 14.2.34 CASE 1:
1927 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
1928 status
= nfserr_clid_inuse
;
1930 atomic_set(&conf
->cl_cb_set
, 0);
1931 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
1932 nfsd4_probe_callback(conf
);
1933 expire_client(unconf
);
1937 } else if (conf
&& !unconf
) {
1939 * RFC 3530 14.2.34 CASE 2:
1940 * probable retransmitted request; play it safe and
1943 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
1944 status
= nfserr_clid_inuse
;
1947 } else if (!conf
&& unconf
1948 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
1950 * RFC 3530 14.2.34 CASE 3:
1951 * Normal case; new or rebooted client:
1953 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
1954 status
= nfserr_clid_inuse
;
1957 clientstr_hashval(unconf
->cl_recdir
);
1958 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
1961 nfsd4_remove_clid_dir(conf
);
1962 expire_client(conf
);
1964 move_to_confirmed(unconf
);
1966 nfsd4_probe_callback(conf
);
1969 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
1970 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
1973 * RFC 3530 14.2.34 CASE 4:
1974 * Client probably hasn't noticed that we rebooted yet.
1976 status
= nfserr_stale_clientid
;
1978 /* check that we have hit one of the cases...*/
1979 status
= nfserr_clid_inuse
;
1982 nfs4_unlock_state();
1986 /* OPEN Share state helper functions */
1987 static inline struct nfs4_file
*
1988 alloc_init_file(struct inode
*ino
)
1990 struct nfs4_file
*fp
;
1991 unsigned int hashval
= file_hashval(ino
);
1993 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
1995 atomic_set(&fp
->fi_ref
, 1);
1996 INIT_LIST_HEAD(&fp
->fi_hash
);
1997 INIT_LIST_HEAD(&fp
->fi_stateids
);
1998 INIT_LIST_HEAD(&fp
->fi_delegations
);
1999 fp
->fi_inode
= igrab(ino
);
2000 fp
->fi_id
= current_fileid
++;
2001 fp
->fi_had_conflict
= false;
2002 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2003 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2004 spin_lock(&recall_lock
);
2005 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2006 spin_unlock(&recall_lock
);
2013 nfsd4_free_slab(struct kmem_cache
**slab
)
2017 kmem_cache_destroy(*slab
);
2022 nfsd4_free_slabs(void)
2024 nfsd4_free_slab(&stateowner_slab
);
2025 nfsd4_free_slab(&file_slab
);
2026 nfsd4_free_slab(&stateid_slab
);
2027 nfsd4_free_slab(&deleg_slab
);
2031 nfsd4_init_slabs(void)
2033 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
2034 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
2035 if (stateowner_slab
== NULL
)
2037 file_slab
= kmem_cache_create("nfsd4_files",
2038 sizeof(struct nfs4_file
), 0, 0, NULL
);
2039 if (file_slab
== NULL
)
2041 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2042 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2043 if (stateid_slab
== NULL
)
2045 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2046 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2047 if (deleg_slab
== NULL
)
2052 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2057 nfs4_free_stateowner(struct kref
*kref
)
2059 struct nfs4_stateowner
*sop
=
2060 container_of(kref
, struct nfs4_stateowner
, so_ref
);
2061 kfree(sop
->so_owner
.data
);
2062 kmem_cache_free(stateowner_slab
, sop
);
2065 static inline struct nfs4_stateowner
*
2066 alloc_stateowner(struct xdr_netobj
*owner
)
2068 struct nfs4_stateowner
*sop
;
2070 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
2071 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
2072 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
2073 sop
->so_owner
.len
= owner
->len
;
2074 kref_init(&sop
->so_ref
);
2077 kmem_cache_free(stateowner_slab
, sop
);
2082 static struct nfs4_stateowner
*
2083 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2084 struct nfs4_stateowner
*sop
;
2085 struct nfs4_replay
*rp
;
2086 unsigned int idhashval
;
2088 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
2090 idhashval
= ownerid_hashval(current_ownerid
);
2091 INIT_LIST_HEAD(&sop
->so_idhash
);
2092 INIT_LIST_HEAD(&sop
->so_strhash
);
2093 INIT_LIST_HEAD(&sop
->so_perclient
);
2094 INIT_LIST_HEAD(&sop
->so_stateids
);
2095 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
2096 INIT_LIST_HEAD(&sop
->so_close_lru
);
2098 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
2099 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2100 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
2101 sop
->so_is_open_owner
= 1;
2102 sop
->so_id
= current_ownerid
++;
2103 sop
->so_client
= clp
;
2104 sop
->so_seqid
= open
->op_seqid
;
2105 sop
->so_confirmed
= 0;
2106 rp
= &sop
->so_replay
;
2107 rp
->rp_status
= nfserr_serverfault
;
2109 rp
->rp_buf
= rp
->rp_ibuf
;
2114 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2115 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2116 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2118 INIT_LIST_HEAD(&stp
->st_hash
);
2119 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2120 INIT_LIST_HEAD(&stp
->st_lockowners
);
2121 INIT_LIST_HEAD(&stp
->st_perfile
);
2122 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2123 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2124 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2125 stp
->st_stateowner
= sop
;
2128 stp
->st_stateid
.si_boot
= boot_time
;
2129 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2130 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2131 stp
->st_stateid
.si_generation
= 0;
2132 stp
->st_access_bmap
= 0;
2133 stp
->st_deny_bmap
= 0;
2134 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2135 &stp
->st_access_bmap
);
2136 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2137 stp
->st_openstp
= NULL
;
2141 move_to_close_lru(struct nfs4_stateowner
*sop
)
2143 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
2145 list_move_tail(&sop
->so_close_lru
, &close_lru
);
2146 sop
->so_time
= get_seconds();
2150 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2153 return (sop
->so_owner
.len
== owner
->len
) &&
2154 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2155 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2158 static struct nfs4_stateowner
*
2159 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2161 struct nfs4_stateowner
*so
= NULL
;
2163 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2164 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2170 /* search file_hashtbl[] for file */
2171 static struct nfs4_file
*
2172 find_file(struct inode
*ino
)
2174 unsigned int hashval
= file_hashval(ino
);
2175 struct nfs4_file
*fp
;
2177 spin_lock(&recall_lock
);
2178 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2179 if (fp
->fi_inode
== ino
) {
2181 spin_unlock(&recall_lock
);
2185 spin_unlock(&recall_lock
);
2189 static inline int access_valid(u32 x
, u32 minorversion
)
2191 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2193 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2195 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2196 if (minorversion
&& x
) {
2197 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2199 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2201 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2208 static inline int deny_valid(u32 x
)
2210 /* Note: unlike access bits, deny bits may be zero. */
2211 return x
<= NFS4_SHARE_DENY_BOTH
;
2215 * Called to check deny when READ with all zero stateid or
2216 * WRITE with all zero or all one stateid
2219 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2221 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2222 struct nfs4_file
*fp
;
2223 struct nfs4_stateid
*stp
;
2226 dprintk("NFSD: nfs4_share_conflict\n");
2228 fp
= find_file(ino
);
2231 ret
= nfserr_locked
;
2232 /* Search for conflicting share reservations */
2233 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2234 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2235 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2245 nfs4_file_downgrade(struct nfs4_file
*fp
, unsigned int share_access
)
2247 if (share_access
& NFS4_SHARE_ACCESS_WRITE
)
2248 nfs4_file_put_access(fp
, O_WRONLY
);
2249 if (share_access
& NFS4_SHARE_ACCESS_READ
)
2250 nfs4_file_put_access(fp
, O_RDONLY
);
2254 * Spawn a thread to perform a recall on the delegation represented
2255 * by the lease (file_lock)
2257 * Called from break_lease() with lock_kernel() held.
2258 * Note: we assume break_lease will only call this *once* for any given
2262 void nfsd_break_deleg_cb(struct file_lock
*fl
)
2264 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2266 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
2270 /* We're assuming the state code never drops its reference
2271 * without first removing the lease. Since we're in this lease
2272 * callback (and since the lease code is serialized by the kernel
2273 * lock) we know the server hasn't removed the lease yet, we know
2274 * it's safe to take a reference: */
2275 atomic_inc(&dp
->dl_count
);
2277 spin_lock(&recall_lock
);
2278 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2279 spin_unlock(&recall_lock
);
2281 /* only place dl_time is set. protected by lock_kernel*/
2282 dp
->dl_time
= get_seconds();
2285 * We don't want the locks code to timeout the lease for us;
2286 * we'll remove it ourself if the delegation isn't returned
2289 fl
->fl_break_time
= 0;
2291 dp
->dl_file
->fi_had_conflict
= true;
2292 nfsd4_cb_recall(dp
);
2296 * The file_lock is being reapd.
2298 * Called by locks_free_lock() with lock_kernel() held.
2301 void nfsd_release_deleg_cb(struct file_lock
*fl
)
2303 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2305 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
2307 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
2309 dp
->dl_flock
= NULL
;
2313 * Called from setlease() with lock_kernel() held
2316 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
2318 struct nfs4_delegation
*onlistd
=
2319 (struct nfs4_delegation
*)onlist
->fl_owner
;
2320 struct nfs4_delegation
*tryd
=
2321 (struct nfs4_delegation
*)try->fl_owner
;
2323 if (onlist
->fl_lmops
!= try->fl_lmops
)
2326 return onlistd
->dl_client
== tryd
->dl_client
;
2331 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2334 return lease_modify(onlist
, arg
);
2339 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2340 .fl_break
= nfsd_break_deleg_cb
,
2341 .fl_release_private
= nfsd_release_deleg_cb
,
2342 .fl_mylease
= nfsd_same_client_deleg_cb
,
2343 .fl_change
= nfsd_change_deleg_cb
,
2348 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2349 struct nfsd4_open
*open
)
2351 clientid_t
*clientid
= &open
->op_clientid
;
2352 struct nfs4_client
*clp
= NULL
;
2353 unsigned int strhashval
;
2354 struct nfs4_stateowner
*sop
= NULL
;
2356 if (!check_name(open
->op_owner
))
2357 return nfserr_inval
;
2359 if (STALE_CLIENTID(&open
->op_clientid
))
2360 return nfserr_stale_clientid
;
2362 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
2363 sop
= find_openstateowner_str(strhashval
, open
);
2364 open
->op_stateowner
= sop
;
2366 /* Make sure the client's lease hasn't expired. */
2367 clp
= find_confirmed_client(clientid
);
2369 return nfserr_expired
;
2372 /* When sessions are used, skip open sequenceid processing */
2373 if (nfsd4_has_session(cstate
))
2375 if (!sop
->so_confirmed
) {
2376 /* Replace unconfirmed owners without checking for replay. */
2377 clp
= sop
->so_client
;
2378 release_openowner(sop
);
2379 open
->op_stateowner
= NULL
;
2382 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2383 if (sop
->so_replay
.rp_buflen
)
2384 return nfserr_replay_me
;
2385 /* The original OPEN failed so spectacularly
2386 * that we don't even have replay data saved!
2387 * Therefore, we have no choice but to continue
2388 * processing this OPEN; presumably, we'll
2389 * fail again for the same reason.
2391 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2394 if (open
->op_seqid
!= sop
->so_seqid
)
2395 return nfserr_bad_seqid
;
2397 if (open
->op_stateowner
== NULL
) {
2398 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2400 return nfserr_resource
;
2401 open
->op_stateowner
= sop
;
2403 list_del_init(&sop
->so_close_lru
);
2404 renew_client(sop
->so_client
);
2408 static inline __be32
2409 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2411 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2412 return nfserr_openmode
;
2417 static struct nfs4_delegation
*
2418 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2420 struct nfs4_delegation
*dp
;
2422 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
2423 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
2429 int share_access_to_flags(u32 share_access
)
2431 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2433 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2437 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2438 struct nfs4_delegation
**dp
)
2441 __be32 status
= nfserr_bad_stateid
;
2443 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2446 flags
= share_access_to_flags(open
->op_share_access
);
2447 status
= nfs4_check_delegmode(*dp
, flags
);
2451 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2455 open
->op_stateowner
->so_confirmed
= 1;
2460 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2462 struct nfs4_stateid
*local
;
2463 __be32 status
= nfserr_share_denied
;
2464 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2466 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2467 /* ignore lock owners */
2468 if (local
->st_stateowner
->so_is_open_owner
== 0)
2470 /* remember if we have seen this open owner */
2471 if (local
->st_stateowner
== sop
)
2473 /* check for conflicting share reservations */
2474 if (!test_share(local
, open
))
2482 static inline struct nfs4_stateid
*
2483 nfs4_alloc_stateid(void)
2485 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2488 static inline int nfs4_access_to_access(u32 nfs4_access
)
2492 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2493 flags
|= NFSD_MAY_READ
;
2494 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2495 flags
|= NFSD_MAY_WRITE
;
2499 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
2500 *fp
, struct svc_fh
*cur_fh
, u32 nfs4_access
)
2503 int oflag
= nfs4_access_to_omode(nfs4_access
);
2504 int access
= nfs4_access_to_access(nfs4_access
);
2506 if (!fp
->fi_fds
[oflag
]) {
2507 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2508 &fp
->fi_fds
[oflag
]);
2509 if (status
== nfserr_dropit
)
2510 status
= nfserr_jukebox
;
2514 nfs4_file_get_access(fp
, oflag
);
2520 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2521 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2522 struct nfsd4_open
*open
)
2524 struct nfs4_stateid
*stp
;
2527 stp
= nfs4_alloc_stateid();
2529 return nfserr_resource
;
2531 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
->op_share_access
);
2533 kmem_cache_free(stateid_slab
, stp
);
2540 static inline __be32
2541 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2542 struct nfsd4_open
*open
)
2544 struct iattr iattr
= {
2545 .ia_valid
= ATTR_SIZE
,
2548 if (!open
->op_truncate
)
2550 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2551 return nfserr_inval
;
2552 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2556 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2558 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2562 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2564 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, op_share_access
);
2568 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2571 int oflag
= nfs4_access_to_omode(new_access
);
2572 nfs4_file_put_access(fp
, oflag
);
2576 /* remember the open */
2577 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2578 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2585 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2587 open
->op_stateowner
->so_confirmed
= 1;
2588 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2592 * Attempt to hand out a delegation.
2595 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2597 struct nfs4_delegation
*dp
;
2598 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2599 int cb_up
= atomic_read(&sop
->so_client
->cl_cb_set
);
2600 struct file_lock
*fl
;
2601 int status
, flag
= 0;
2603 flag
= NFS4_OPEN_DELEGATE_NONE
;
2604 open
->op_recall
= 0;
2605 switch (open
->op_claim_type
) {
2606 case NFS4_OPEN_CLAIM_PREVIOUS
:
2608 open
->op_recall
= 1;
2609 flag
= open
->op_delegate_type
;
2610 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2613 case NFS4_OPEN_CLAIM_NULL
:
2614 /* Let's not give out any delegations till everyone's
2615 * had the chance to reclaim theirs.... */
2616 if (locks_in_grace())
2618 if (!cb_up
|| !sop
->so_confirmed
)
2620 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2621 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2623 flag
= NFS4_OPEN_DELEGATE_READ
;
2629 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2631 flag
= NFS4_OPEN_DELEGATE_NONE
;
2635 fl
= locks_alloc_lock();
2638 locks_init_lock(fl
);
2639 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2640 fl
->fl_flags
= FL_LEASE
;
2641 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2642 fl
->fl_end
= OFFSET_MAX
;
2643 fl
->fl_owner
= (fl_owner_t
)dp
;
2644 fl
->fl_file
= find_readable_file(stp
->st_file
);
2645 BUG_ON(!fl
->fl_file
);
2646 fl
->fl_pid
= current
->tgid
;
2649 /* vfs_setlease checks to see if delegation should be handed out.
2650 * the lock_manager callbacks fl_mylease and fl_change are used
2652 if ((status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
))) {
2653 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
2654 dp
->dl_flock
= NULL
;
2655 locks_free_lock(fl
);
2656 unhash_delegation(dp
);
2657 flag
= NFS4_OPEN_DELEGATE_NONE
;
2661 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2663 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2664 STATEID_VAL(&dp
->dl_stateid
));
2666 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2667 && flag
== NFS4_OPEN_DELEGATE_NONE
2668 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2669 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2670 open
->op_delegate_type
= flag
;
2674 * called with nfs4_lock_state() held.
2677 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2679 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2680 struct nfs4_file
*fp
= NULL
;
2681 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2682 struct nfs4_stateid
*stp
= NULL
;
2683 struct nfs4_delegation
*dp
= NULL
;
2686 status
= nfserr_inval
;
2687 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2688 || !deny_valid(open
->op_share_deny
))
2691 * Lookup file; if found, lookup stateid and check open request,
2692 * and check for delegations in the process of being recalled.
2693 * If not found, create the nfs4_file struct
2695 fp
= find_file(ino
);
2697 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2699 status
= nfs4_check_deleg(fp
, open
, &dp
);
2703 status
= nfserr_bad_stateid
;
2704 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2706 status
= nfserr_resource
;
2707 fp
= alloc_init_file(ino
);
2713 * OPEN the file, or upgrade an existing OPEN.
2714 * If truncate fails, the OPEN fails.
2717 /* Stateid was found, this is an OPEN upgrade */
2718 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2721 update_stateid(&stp
->st_stateid
);
2723 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2726 init_stateid(stp
, fp
, open
);
2727 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2729 release_open_stateid(stp
);
2732 if (nfsd4_has_session(&resp
->cstate
))
2733 update_stateid(&stp
->st_stateid
);
2735 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2737 if (nfsd4_has_session(&resp
->cstate
))
2738 open
->op_stateowner
->so_confirmed
= 1;
2741 * Attempt to hand out a delegation. No error return, because the
2742 * OPEN succeeds even if we fail.
2744 nfs4_open_delegation(current_fh
, open
, stp
);
2748 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2749 STATEID_VAL(&stp
->st_stateid
));
2753 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2754 nfs4_set_claim_prev(open
);
2756 * To finish the open response, we just need to set the rflags.
2758 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2759 if (!open
->op_stateowner
->so_confirmed
&&
2760 !nfsd4_has_session(&resp
->cstate
))
2761 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2767 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2770 struct nfs4_client
*clp
;
2774 dprintk("process_renew(%08x/%08x): starting\n",
2775 clid
->cl_boot
, clid
->cl_id
);
2776 status
= nfserr_stale_clientid
;
2777 if (STALE_CLIENTID(clid
))
2779 clp
= find_confirmed_client(clid
);
2780 status
= nfserr_expired
;
2782 /* We assume the client took too long to RENEW. */
2783 dprintk("nfsd4_renew: clientid not found!\n");
2787 status
= nfserr_cb_path_down
;
2788 if (!list_empty(&clp
->cl_delegations
)
2789 && !atomic_read(&clp
->cl_cb_set
))
2793 nfs4_unlock_state();
2797 struct lock_manager nfsd4_manager
= {
2801 nfsd4_end_grace(void)
2803 dprintk("NFSD: end of grace period\n");
2804 nfsd4_recdir_purge_old();
2805 locks_end_grace(&nfsd4_manager
);
2807 * Now that every NFSv4 client has had the chance to recover and
2808 * to see the (possibly new, possibly shorter) lease time, we
2809 * can safely set the next grace time to the current lease time:
2811 nfsd4_grace
= nfsd4_lease
;
2815 nfs4_laundromat(void)
2817 struct nfs4_client
*clp
;
2818 struct nfs4_stateowner
*sop
;
2819 struct nfs4_delegation
*dp
;
2820 struct list_head
*pos
, *next
, reaplist
;
2821 time_t cutoff
= get_seconds() - nfsd4_lease
;
2822 time_t t
, clientid_val
= nfsd4_lease
;
2823 time_t u
, test_val
= nfsd4_lease
;
2827 dprintk("NFSD: laundromat service - starting\n");
2828 if (locks_in_grace())
2830 INIT_LIST_HEAD(&reaplist
);
2831 spin_lock(&client_lock
);
2832 list_for_each_safe(pos
, next
, &client_lru
) {
2833 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2834 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
2835 t
= clp
->cl_time
- cutoff
;
2836 if (clientid_val
> t
)
2840 if (atomic_read(&clp
->cl_refcount
)) {
2841 dprintk("NFSD: client in use (clientid %08x)\n",
2842 clp
->cl_clientid
.cl_id
);
2845 unhash_client_locked(clp
);
2846 list_add(&clp
->cl_lru
, &reaplist
);
2848 spin_unlock(&client_lock
);
2849 list_for_each_safe(pos
, next
, &reaplist
) {
2850 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2851 dprintk("NFSD: purging unused client (clientid %08x)\n",
2852 clp
->cl_clientid
.cl_id
);
2853 nfsd4_remove_clid_dir(clp
);
2856 spin_lock(&recall_lock
);
2857 list_for_each_safe(pos
, next
, &del_recall_lru
) {
2858 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2859 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
2860 u
= dp
->dl_time
- cutoff
;
2865 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
2867 list_move(&dp
->dl_recall_lru
, &reaplist
);
2869 spin_unlock(&recall_lock
);
2870 list_for_each_safe(pos
, next
, &reaplist
) {
2871 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2872 list_del_init(&dp
->dl_recall_lru
);
2873 unhash_delegation(dp
);
2875 test_val
= nfsd4_lease
;
2876 list_for_each_safe(pos
, next
, &close_lru
) {
2877 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
2878 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
2879 u
= sop
->so_time
- cutoff
;
2884 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2886 release_openowner(sop
);
2888 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
2889 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
2890 nfs4_unlock_state();
2891 return clientid_val
;
2894 static struct workqueue_struct
*laundry_wq
;
2895 static void laundromat_main(struct work_struct
*);
2896 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
2899 laundromat_main(struct work_struct
*not_used
)
2903 t
= nfs4_laundromat();
2904 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2905 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2908 static struct nfs4_stateowner
*
2909 search_close_lru(u32 st_id
, int flags
)
2911 struct nfs4_stateowner
*local
= NULL
;
2913 if (flags
& CLOSE_STATE
) {
2914 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
2915 if (local
->so_id
== st_id
)
2923 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2925 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
2929 STALE_STATEID(stateid_t
*stateid
)
2931 if (stateid
->si_boot
== boot_time
)
2933 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
2934 STATEID_VAL(stateid
));
2939 access_permit_read(unsigned long access_bmap
)
2941 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2942 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2943 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2947 access_permit_write(unsigned long access_bmap
)
2949 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2950 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2954 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2956 __be32 status
= nfserr_openmode
;
2958 /* For lock stateid's, we test the parent open, not the lock: */
2959 if (stp
->st_openstp
)
2960 stp
= stp
->st_openstp
;
2961 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2963 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2970 static inline __be32
2971 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2973 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2975 else if (locks_in_grace()) {
2976 /* Answer in remaining cases depends on existance of
2977 * conflicting state; so we must wait out the grace period. */
2978 return nfserr_grace
;
2979 } else if (flags
& WR_STATE
)
2980 return nfs4_share_conflict(current_fh
,
2981 NFS4_SHARE_DENY_WRITE
);
2982 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2983 return nfs4_share_conflict(current_fh
,
2984 NFS4_SHARE_DENY_READ
);
2988 * Allow READ/WRITE during grace period on recovered state only for files
2989 * that are not able to provide mandatory locking.
2992 grace_disallows_io(struct inode
*inode
)
2994 return locks_in_grace() && mandatory_lock(inode
);
2997 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, int flags
)
3000 * When sessions are used the stateid generation number is ignored
3003 if ((flags
& HAS_SESSION
) && in
->si_generation
== 0)
3006 /* If the client sends us a stateid from the future, it's buggy: */
3007 if (in
->si_generation
> ref
->si_generation
)
3008 return nfserr_bad_stateid
;
3010 * The following, however, can happen. For example, if the
3011 * client sends an open and some IO at the same time, the open
3012 * may bump si_generation while the IO is still in flight.
3013 * Thanks to hard links and renames, the client never knows what
3014 * file an open will affect. So it could avoid that situation
3015 * only by serializing all opens and IO from the same open
3016 * owner. To recover from the old_stateid error, the client
3017 * will just have to retry the IO:
3019 if (in
->si_generation
< ref
->si_generation
)
3020 return nfserr_old_stateid
;
3025 static int is_delegation_stateid(stateid_t
*stateid
)
3027 return stateid
->si_fileid
== 0;
3031 * Checks for stateid operations
3034 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3035 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3037 struct nfs4_stateid
*stp
= NULL
;
3038 struct nfs4_delegation
*dp
= NULL
;
3039 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3040 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3046 if (grace_disallows_io(ino
))
3047 return nfserr_grace
;
3049 if (nfsd4_has_session(cstate
))
3050 flags
|= HAS_SESSION
;
3052 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3053 return check_special_stateids(current_fh
, stateid
, flags
);
3055 status
= nfserr_stale_stateid
;
3056 if (STALE_STATEID(stateid
))
3060 * We assume that any stateid that has the current boot time,
3061 * but that we can't find, is expired:
3063 status
= nfserr_expired
;
3064 if (is_delegation_stateid(stateid
)) {
3065 dp
= find_delegation_stateid(ino
, stateid
);
3068 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
,
3072 status
= nfs4_check_delegmode(dp
, flags
);
3075 renew_client(dp
->dl_client
);
3077 *filpp
= find_readable_file(dp
->dl_file
);
3079 } else { /* open or lock stateid */
3080 stp
= find_stateid(stateid
, flags
);
3083 status
= nfserr_bad_stateid
;
3084 if (nfs4_check_fh(current_fh
, stp
))
3086 if (!stp
->st_stateowner
->so_confirmed
)
3088 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3092 status
= nfs4_check_openmode(stp
, flags
);
3095 renew_client(stp
->st_stateowner
->so_client
);
3097 if (flags
& RD_STATE
)
3098 *filpp
= find_readable_file(stp
->st_file
);
3100 *filpp
= find_writeable_file(stp
->st_file
);
3111 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3112 RD_STATE
: WR_STATE
;
3116 * Checks for sequence id mutating operations.
3119 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3120 stateid_t
*stateid
, int flags
,
3121 struct nfs4_stateowner
**sopp
,
3122 struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
3124 struct nfs4_stateid
*stp
;
3125 struct nfs4_stateowner
*sop
;
3126 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3129 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3130 seqid
, STATEID_VAL(stateid
));
3135 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
3136 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
3137 return nfserr_bad_stateid
;
3140 if (STALE_STATEID(stateid
))
3141 return nfserr_stale_stateid
;
3143 if (nfsd4_has_session(cstate
))
3144 flags
|= HAS_SESSION
;
3147 * We return BAD_STATEID if filehandle doesn't match stateid,
3148 * the confirmed flag is incorrecly set, or the generation
3149 * number is incorrect.
3151 stp
= find_stateid(stateid
, flags
);
3154 * Also, we should make sure this isn't just the result of
3157 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
3158 /* It's not stale; let's assume it's expired: */
3160 return nfserr_expired
;
3166 *sopp
= sop
= stp
->st_stateowner
;
3169 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
3170 struct nfs4_client
*clp
= sop
->so_client
;
3174 lkflg
= setlkflg(lock
->lk_type
);
3176 if (lock
->lk_is_new
) {
3177 if (!sop
->so_is_open_owner
)
3178 return nfserr_bad_stateid
;
3179 if (!(flags
& HAS_SESSION
) &&
3180 !same_clid(&clp
->cl_clientid
, lockclid
))
3181 return nfserr_bad_stateid
;
3182 /* stp is the open stateid */
3183 status
= nfs4_check_openmode(stp
, lkflg
);
3187 /* stp is the lock stateid */
3188 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
3194 if (nfs4_check_fh(current_fh
, stp
)) {
3195 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3196 return nfserr_bad_stateid
;
3200 * We now validate the seqid and stateid generation numbers.
3201 * For the moment, we ignore the possibility of
3202 * generation number wraparound.
3204 if (!(flags
& HAS_SESSION
) && seqid
!= sop
->so_seqid
)
3207 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
3208 dprintk("NFSD: preprocess_seqid_op: expected"
3209 " unconfirmed stateowner!\n");
3210 return nfserr_bad_stateid
;
3212 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
3213 dprintk("NFSD: preprocess_seqid_op: stateowner not"
3214 " confirmed yet!\n");
3215 return nfserr_bad_stateid
;
3217 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, flags
);
3220 renew_client(sop
->so_client
);
3224 if (seqid
== sop
->so_seqid
- 1) {
3225 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
3226 /* indicate replay to calling function */
3227 return nfserr_replay_me
;
3229 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
3230 sop
->so_seqid
, seqid
);
3232 return nfserr_bad_seqid
;
3236 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3237 struct nfsd4_open_confirm
*oc
)
3240 struct nfs4_stateowner
*sop
;
3241 struct nfs4_stateid
*stp
;
3243 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3244 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3245 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3247 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3253 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3254 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3255 CONFIRM
| OPEN_STATE
,
3256 &oc
->oc_stateowner
, &stp
, NULL
)))
3259 sop
= oc
->oc_stateowner
;
3260 sop
->so_confirmed
= 1;
3261 update_stateid(&stp
->st_stateid
);
3262 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3263 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3264 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3266 nfsd4_create_clid_dir(sop
->so_client
);
3268 if (oc
->oc_stateowner
) {
3269 nfs4_get_stateowner(oc
->oc_stateowner
);
3270 cstate
->replay_owner
= oc
->oc_stateowner
;
3272 nfs4_unlock_state();
3278 * unset all bits in union bitmap (bmap) that
3279 * do not exist in share (from successful OPEN_DOWNGRADE)
3282 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
3285 for (i
= 1; i
< 4; i
++) {
3286 if ((i
& access
) != i
)
3287 __clear_bit(i
, bmap
);
3292 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3295 for (i
= 0; i
< 4; i
++) {
3296 if ((i
& deny
) != i
)
3297 __clear_bit(i
, bmap
);
3302 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3303 struct nfsd4_compound_state
*cstate
,
3304 struct nfsd4_open_downgrade
*od
)
3307 struct nfs4_stateid
*stp
;
3308 unsigned int share_access
;
3310 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3311 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3312 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3314 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3315 || !deny_valid(od
->od_share_deny
))
3316 return nfserr_inval
;
3319 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3323 &od
->od_stateowner
, &stp
, NULL
)))
3326 status
= nfserr_inval
;
3327 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3328 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3329 stp
->st_access_bmap
, od
->od_share_access
);
3332 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3333 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3334 stp
->st_deny_bmap
, od
->od_share_deny
);
3337 set_access(&share_access
, stp
->st_access_bmap
);
3338 nfs4_file_downgrade(stp
->st_file
, share_access
& ~od
->od_share_access
);
3340 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
3341 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3343 update_stateid(&stp
->st_stateid
);
3344 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3347 if (od
->od_stateowner
) {
3348 nfs4_get_stateowner(od
->od_stateowner
);
3349 cstate
->replay_owner
= od
->od_stateowner
;
3351 nfs4_unlock_state();
3356 * nfs4_unlock_state() called after encode
3359 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3360 struct nfsd4_close
*close
)
3363 struct nfs4_stateid
*stp
;
3365 dprintk("NFSD: nfsd4_close on file %.*s\n",
3366 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3367 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3370 /* check close_lru for replay */
3371 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3374 OPEN_STATE
| CLOSE_STATE
,
3375 &close
->cl_stateowner
, &stp
, NULL
)))
3378 update_stateid(&stp
->st_stateid
);
3379 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3381 /* release_stateid() calls nfsd_close() if needed */
3382 release_open_stateid(stp
);
3384 /* place unused nfs4_stateowners on so_close_lru list to be
3385 * released by the laundromat service after the lease period
3386 * to enable us to handle CLOSE replay
3388 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3389 move_to_close_lru(close
->cl_stateowner
);
3391 if (close
->cl_stateowner
) {
3392 nfs4_get_stateowner(close
->cl_stateowner
);
3393 cstate
->replay_owner
= close
->cl_stateowner
;
3395 nfs4_unlock_state();
3400 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3401 struct nfsd4_delegreturn
*dr
)
3403 struct nfs4_delegation
*dp
;
3404 stateid_t
*stateid
= &dr
->dr_stateid
;
3405 struct inode
*inode
;
3409 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3411 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3413 if (nfsd4_has_session(cstate
))
3414 flags
|= HAS_SESSION
;
3416 status
= nfserr_bad_stateid
;
3417 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3419 status
= nfserr_stale_stateid
;
3420 if (STALE_STATEID(stateid
))
3422 status
= nfserr_bad_stateid
;
3423 if (!is_delegation_stateid(stateid
))
3425 status
= nfserr_expired
;
3426 dp
= find_delegation_stateid(inode
, stateid
);
3429 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, flags
);
3432 renew_client(dp
->dl_client
);
3434 unhash_delegation(dp
);
3436 nfs4_unlock_state();
3443 * Lock owner state (byte-range locks)
3445 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3446 #define LOCK_HASH_BITS 8
3447 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3448 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3451 end_offset(u64 start
, u64 len
)
3456 return end
>= start
? end
: NFS4_MAX_UINT64
;
3459 /* last octet in a range */
3461 last_byte_offset(u64 start
, u64 len
)
3467 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3470 #define lockownerid_hashval(id) \
3471 ((id) & LOCK_HASH_MASK)
3473 static inline unsigned int
3474 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3475 struct xdr_netobj
*ownername
)
3477 return (file_hashval(inode
) + cl_id
3478 + opaque_hashval(ownername
->data
, ownername
->len
))
3482 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3483 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3484 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3486 static struct nfs4_stateid
*
3487 find_stateid(stateid_t
*stid
, int flags
)
3489 struct nfs4_stateid
*local
;
3490 u32 st_id
= stid
->si_stateownerid
;
3491 u32 f_id
= stid
->si_fileid
;
3492 unsigned int hashval
;
3494 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3495 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3496 hashval
= stateid_hashval(st_id
, f_id
);
3497 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3498 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3499 (local
->st_stateid
.si_fileid
== f_id
))
3504 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3505 hashval
= stateid_hashval(st_id
, f_id
);
3506 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3507 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3508 (local
->st_stateid
.si_fileid
== f_id
))
3515 static struct nfs4_delegation
*
3516 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3518 struct nfs4_file
*fp
;
3519 struct nfs4_delegation
*dl
;
3521 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3524 fp
= find_file(ino
);
3527 dl
= find_delegation_file(fp
, stid
);
3533 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3534 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3535 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3536 * locking, this prevents us from being completely protocol-compliant. The
3537 * real solution to this problem is to start using unsigned file offsets in
3538 * the VFS, but this is a very deep change!
3541 nfs4_transform_lock_offset(struct file_lock
*lock
)
3543 if (lock
->fl_start
< 0)
3544 lock
->fl_start
= OFFSET_MAX
;
3545 if (lock
->fl_end
< 0)
3546 lock
->fl_end
= OFFSET_MAX
;
3549 /* Hack!: For now, we're defining this just so we can use a pointer to it
3550 * as a unique cookie to identify our (NFSv4's) posix locks. */
3551 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3555 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3557 struct nfs4_stateowner
*sop
;
3559 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3560 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3561 kref_get(&sop
->so_ref
);
3563 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3565 deny
->ld_sop
= NULL
;
3566 deny
->ld_clientid
.cl_boot
= 0;
3567 deny
->ld_clientid
.cl_id
= 0;
3569 deny
->ld_start
= fl
->fl_start
;
3570 deny
->ld_length
= NFS4_MAX_UINT64
;
3571 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3572 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3573 deny
->ld_type
= NFS4_READ_LT
;
3574 if (fl
->fl_type
!= F_RDLCK
)
3575 deny
->ld_type
= NFS4_WRITE_LT
;
3578 static struct nfs4_stateowner
*
3579 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3580 struct xdr_netobj
*owner
)
3582 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3583 struct nfs4_stateowner
*op
;
3585 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3586 if (same_owner_str(op
, owner
, clid
))
3593 * Alloc a lock owner structure.
3594 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3597 * strhashval = lock_ownerstr_hashval
3600 static struct nfs4_stateowner
*
3601 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3602 struct nfs4_stateowner
*sop
;
3603 struct nfs4_replay
*rp
;
3604 unsigned int idhashval
;
3606 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
3608 idhashval
= lockownerid_hashval(current_ownerid
);
3609 INIT_LIST_HEAD(&sop
->so_idhash
);
3610 INIT_LIST_HEAD(&sop
->so_strhash
);
3611 INIT_LIST_HEAD(&sop
->so_perclient
);
3612 INIT_LIST_HEAD(&sop
->so_stateids
);
3613 INIT_LIST_HEAD(&sop
->so_perstateid
);
3614 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
3616 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3617 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3618 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3619 sop
->so_is_open_owner
= 0;
3620 sop
->so_id
= current_ownerid
++;
3621 sop
->so_client
= clp
;
3622 /* It is the openowner seqid that will be incremented in encode in the
3623 * case of new lockowners; so increment the lock seqid manually: */
3624 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3625 sop
->so_confirmed
= 1;
3626 rp
= &sop
->so_replay
;
3627 rp
->rp_status
= nfserr_serverfault
;
3629 rp
->rp_buf
= rp
->rp_ibuf
;
3633 static struct nfs4_stateid
*
3634 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3636 struct nfs4_stateid
*stp
;
3637 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3639 stp
= nfs4_alloc_stateid();
3642 INIT_LIST_HEAD(&stp
->st_hash
);
3643 INIT_LIST_HEAD(&stp
->st_perfile
);
3644 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3645 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3646 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3647 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3648 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3649 stp
->st_stateowner
= sop
;
3652 stp
->st_stateid
.si_boot
= boot_time
;
3653 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3654 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3655 stp
->st_stateid
.si_generation
= 0;
3656 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3657 stp
->st_openstp
= open_stp
;
3664 check_lock_length(u64 offset
, u64 length
)
3666 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3667 LOFF_OVERFLOW(offset
, length
)));
3674 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3675 struct nfsd4_lock
*lock
)
3677 struct nfs4_stateowner
*open_sop
= NULL
;
3678 struct nfs4_stateowner
*lock_sop
= NULL
;
3679 struct nfs4_stateid
*lock_stp
;
3680 struct nfs4_file
*fp
;
3681 struct file
*filp
= NULL
;
3682 struct file_lock file_lock
;
3683 struct file_lock conflock
;
3685 unsigned int strhashval
;
3689 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3690 (long long) lock
->lk_offset
,
3691 (long long) lock
->lk_length
);
3693 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3694 return nfserr_inval
;
3696 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3697 S_IFREG
, NFSD_MAY_LOCK
))) {
3698 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3704 if (lock
->lk_is_new
) {
3706 * Client indicates that this is a new lockowner.
3707 * Use open owner and open stateid to create lock owner and
3710 struct nfs4_stateid
*open_stp
= NULL
;
3712 status
= nfserr_stale_clientid
;
3713 if (!nfsd4_has_session(cstate
) &&
3714 STALE_CLIENTID(&lock
->lk_new_clientid
))
3717 /* validate and update open stateid and open seqid */
3718 status
= nfs4_preprocess_seqid_op(cstate
,
3719 lock
->lk_new_open_seqid
,
3720 &lock
->lk_new_open_stateid
,
3722 &lock
->lk_replay_owner
, &open_stp
,
3726 open_sop
= lock
->lk_replay_owner
;
3727 /* create lockowner and lock stateid */
3728 fp
= open_stp
->st_file
;
3729 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3730 open_sop
->so_client
->cl_clientid
.cl_id
,
3731 &lock
->v
.new.owner
);
3732 /* XXX: Do we need to check for duplicate stateowners on
3733 * the same file, or should they just be allowed (and
3734 * create new stateids)? */
3735 status
= nfserr_resource
;
3736 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3737 open_sop
->so_client
, open_stp
, lock
);
3738 if (lock_sop
== NULL
)
3740 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3741 if (lock_stp
== NULL
)
3744 /* lock (lock owner + lock stateid) already exists */
3745 status
= nfs4_preprocess_seqid_op(cstate
,
3746 lock
->lk_old_lock_seqid
,
3747 &lock
->lk_old_lock_stateid
,
3749 &lock
->lk_replay_owner
, &lock_stp
, lock
);
3752 lock_sop
= lock
->lk_replay_owner
;
3753 fp
= lock_stp
->st_file
;
3755 /* lock->lk_replay_owner and lock_stp have been created or found */
3757 status
= nfserr_grace
;
3758 if (locks_in_grace() && !lock
->lk_reclaim
)
3760 status
= nfserr_no_grace
;
3761 if (!locks_in_grace() && lock
->lk_reclaim
)
3764 locks_init_lock(&file_lock
);
3765 switch (lock
->lk_type
) {
3768 if (find_readable_file(lock_stp
->st_file
)) {
3769 nfs4_get_vfs_file(rqstp
, fp
, &cstate
->current_fh
, NFS4_SHARE_ACCESS_READ
);
3770 filp
= find_readable_file(lock_stp
->st_file
);
3772 file_lock
.fl_type
= F_RDLCK
;
3776 case NFS4_WRITEW_LT
:
3777 if (find_writeable_file(lock_stp
->st_file
)) {
3778 nfs4_get_vfs_file(rqstp
, fp
, &cstate
->current_fh
, NFS4_SHARE_ACCESS_WRITE
);
3779 filp
= find_writeable_file(lock_stp
->st_file
);
3781 file_lock
.fl_type
= F_WRLCK
;
3785 status
= nfserr_inval
;
3789 status
= nfserr_openmode
;
3792 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3793 file_lock
.fl_pid
= current
->tgid
;
3794 file_lock
.fl_file
= filp
;
3795 file_lock
.fl_flags
= FL_POSIX
;
3796 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3798 file_lock
.fl_start
= lock
->lk_offset
;
3799 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3800 nfs4_transform_lock_offset(&file_lock
);
3803 * Try to lock the file in the VFS.
3804 * Note: locks.c uses the BKL to protect the inode's lock list.
3807 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
3809 case 0: /* success! */
3810 update_stateid(&lock_stp
->st_stateid
);
3811 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
3815 case (EAGAIN
): /* conflock holds conflicting lock */
3816 status
= nfserr_denied
;
3817 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3818 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3821 status
= nfserr_deadlock
;
3824 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3825 status
= nfserr_resource
;
3829 if (status
&& lock
->lk_is_new
&& lock_sop
)
3830 release_lockowner(lock_sop
);
3831 if (lock
->lk_replay_owner
) {
3832 nfs4_get_stateowner(lock
->lk_replay_owner
);
3833 cstate
->replay_owner
= lock
->lk_replay_owner
;
3835 nfs4_unlock_state();
3840 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3841 * so we do a temporary open here just to get an open file to pass to
3842 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3845 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
3850 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
3853 err
= vfs_test_lock(file
, lock
);
3862 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3863 struct nfsd4_lockt
*lockt
)
3865 struct inode
*inode
;
3866 struct file_lock file_lock
;
3870 if (locks_in_grace())
3871 return nfserr_grace
;
3873 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
3874 return nfserr_inval
;
3876 lockt
->lt_stateowner
= NULL
;
3879 status
= nfserr_stale_clientid
;
3880 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
3883 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
3884 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
3885 if (status
== nfserr_symlink
)
3886 status
= nfserr_inval
;
3890 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3891 locks_init_lock(&file_lock
);
3892 switch (lockt
->lt_type
) {
3895 file_lock
.fl_type
= F_RDLCK
;
3898 case NFS4_WRITEW_LT
:
3899 file_lock
.fl_type
= F_WRLCK
;
3902 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
3903 status
= nfserr_inval
;
3907 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
3908 &lockt
->lt_clientid
, &lockt
->lt_owner
);
3909 if (lockt
->lt_stateowner
)
3910 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
3911 file_lock
.fl_pid
= current
->tgid
;
3912 file_lock
.fl_flags
= FL_POSIX
;
3914 file_lock
.fl_start
= lockt
->lt_offset
;
3915 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
3917 nfs4_transform_lock_offset(&file_lock
);
3920 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
3922 status
= nfserrno(error
);
3925 if (file_lock
.fl_type
!= F_UNLCK
) {
3926 status
= nfserr_denied
;
3927 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
3930 nfs4_unlock_state();
3935 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3936 struct nfsd4_locku
*locku
)
3938 struct nfs4_stateid
*stp
;
3939 struct file
*filp
= NULL
;
3940 struct file_lock file_lock
;
3944 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
3945 (long long) locku
->lu_offset
,
3946 (long long) locku
->lu_length
);
3948 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
3949 return nfserr_inval
;
3953 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3957 &locku
->lu_stateowner
, &stp
, NULL
)))
3960 filp
= find_any_file(stp
->st_file
);
3962 status
= nfserr_lock_range
;
3966 locks_init_lock(&file_lock
);
3967 file_lock
.fl_type
= F_UNLCK
;
3968 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
3969 file_lock
.fl_pid
= current
->tgid
;
3970 file_lock
.fl_file
= filp
;
3971 file_lock
.fl_flags
= FL_POSIX
;
3972 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3973 file_lock
.fl_start
= locku
->lu_offset
;
3975 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
3976 nfs4_transform_lock_offset(&file_lock
);
3979 * Try to unlock the file in the VFS.
3981 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
3983 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
3987 * OK, unlock succeeded; the only thing left to do is update the stateid.
3989 update_stateid(&stp
->st_stateid
);
3990 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3993 if (locku
->lu_stateowner
) {
3994 nfs4_get_stateowner(locku
->lu_stateowner
);
3995 cstate
->replay_owner
= locku
->lu_stateowner
;
3997 nfs4_unlock_state();
4001 status
= nfserrno(err
);
4007 * 1: locks held by lockowner
4008 * 0: no locks held by lockowner
4011 check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
)
4013 struct file_lock
**flpp
;
4014 struct inode
*inode
= filp
->fi_inode
;
4018 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4019 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4030 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4031 struct nfsd4_compound_state
*cstate
,
4032 struct nfsd4_release_lockowner
*rlockowner
)
4034 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4035 struct nfs4_stateowner
*sop
;
4036 struct nfs4_stateid
*stp
;
4037 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4038 struct list_head matches
;
4042 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4043 clid
->cl_boot
, clid
->cl_id
);
4045 /* XXX check for lease expiration */
4047 status
= nfserr_stale_clientid
;
4048 if (STALE_CLIENTID(clid
))
4053 status
= nfserr_locks_held
;
4054 /* XXX: we're doing a linear search through all the lockowners.
4055 * Yipes! For now we'll just hope clients aren't really using
4056 * release_lockowner much, but eventually we have to fix these
4057 * data structures. */
4058 INIT_LIST_HEAD(&matches
);
4059 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4060 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4061 if (!same_owner_str(sop
, owner
, clid
))
4063 list_for_each_entry(stp
, &sop
->so_stateids
,
4065 if (check_for_locks(stp
->st_file
, sop
))
4067 /* Note: so_perclient unused for lockowners,
4068 * so it's OK to fool with here. */
4069 list_add(&sop
->so_perclient
, &matches
);
4073 /* Clients probably won't expect us to return with some (but not all)
4074 * of the lockowner state released; so don't release any until all
4075 * have been checked. */
4077 while (!list_empty(&matches
)) {
4078 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
4080 /* unhash_stateowner deletes so_perclient only
4081 * for openowners. */
4082 list_del(&sop
->so_perclient
);
4083 release_lockowner(sop
);
4086 nfs4_unlock_state();
4090 static inline struct nfs4_client_reclaim
*
4093 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4097 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4099 unsigned int strhashval
= clientstr_hashval(name
);
4100 struct nfs4_client
*clp
;
4102 clp
= find_confirmed_client_by_str(name
, strhashval
, use_exchange_id
);
4107 * failure => all reset bets are off, nfserr_no_grace...
4110 nfs4_client_to_reclaim(const char *name
)
4112 unsigned int strhashval
;
4113 struct nfs4_client_reclaim
*crp
= NULL
;
4115 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4116 crp
= alloc_reclaim();
4119 strhashval
= clientstr_hashval(name
);
4120 INIT_LIST_HEAD(&crp
->cr_strhash
);
4121 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4122 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4123 reclaim_str_hashtbl_size
++;
4128 nfs4_release_reclaim(void)
4130 struct nfs4_client_reclaim
*crp
= NULL
;
4133 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4134 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4135 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4136 struct nfs4_client_reclaim
, cr_strhash
);
4137 list_del(&crp
->cr_strhash
);
4139 reclaim_str_hashtbl_size
--;
4142 BUG_ON(reclaim_str_hashtbl_size
);
4146 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4147 static struct nfs4_client_reclaim
*
4148 nfs4_find_reclaim_client(clientid_t
*clid
)
4150 unsigned int strhashval
;
4151 struct nfs4_client
*clp
;
4152 struct nfs4_client_reclaim
*crp
= NULL
;
4155 /* find clientid in conf_id_hashtbl */
4156 clp
= find_confirmed_client(clid
);
4160 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4161 clp
->cl_name
.len
, clp
->cl_name
.data
,
4164 /* find clp->cl_name in reclaim_str_hashtbl */
4165 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4166 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4167 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4175 * Called from OPEN. Look for clientid in reclaim list.
4178 nfs4_check_open_reclaim(clientid_t
*clid
)
4180 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4183 /* initialization to perform at module load time: */
4186 nfs4_state_init(void)
4190 status
= nfsd4_init_slabs();
4193 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4194 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4195 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4196 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4197 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4198 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4200 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4201 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4202 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4203 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4205 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4206 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4207 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
4209 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
4210 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4211 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
4213 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4214 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4215 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4217 memset(&onestateid
, ~0, sizeof(stateid_t
));
4218 INIT_LIST_HEAD(&close_lru
);
4219 INIT_LIST_HEAD(&client_lru
);
4220 INIT_LIST_HEAD(&del_recall_lru
);
4221 reclaim_str_hashtbl_size
= 0;
4226 nfsd4_load_reboot_recovery_data(void)
4231 nfsd4_init_recdir(user_recovery_dirname
);
4232 status
= nfsd4_recdir_load();
4233 nfs4_unlock_state();
4235 printk("NFSD: Failure reading reboot recovery data\n");
4239 * Since the lifetime of a delegation isn't limited to that of an open, a
4240 * client may quite reasonably hang on to a delegation as long as it has
4241 * the inode cached. This becomes an obvious problem the first time a
4242 * client's inode cache approaches the size of the server's total memory.
4244 * For now we avoid this problem by imposing a hard limit on the number
4245 * of delegations, which varies according to the server's memory size.
4248 set_max_delegations(void)
4251 * Allow at most 4 delegations per megabyte of RAM. Quick
4252 * estimates suggest that in the worst case (where every delegation
4253 * is for a different inode), a delegation could take about 1.5K,
4254 * giving a worst case usage of about 6% of memory.
4256 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4259 /* initialization to perform when the nfsd service is started: */
4262 __nfs4_state_start(void)
4266 boot_time
= get_seconds();
4267 locks_start_grace(&nfsd4_manager
);
4268 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4270 ret
= set_callback_cred();
4273 laundry_wq
= create_singlethread_workqueue("nfsd4");
4274 if (laundry_wq
== NULL
)
4276 ret
= nfsd4_create_callback_queue();
4278 goto out_free_laundry
;
4279 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4280 set_max_delegations();
4283 destroy_workqueue(laundry_wq
);
4288 nfs4_state_start(void)
4290 nfsd4_load_reboot_recovery_data();
4291 return __nfs4_state_start();
4295 __nfs4_state_shutdown(void)
4298 struct nfs4_client
*clp
= NULL
;
4299 struct nfs4_delegation
*dp
= NULL
;
4300 struct list_head
*pos
, *next
, reaplist
;
4302 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4303 while (!list_empty(&conf_id_hashtbl
[i
])) {
4304 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4307 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4308 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4312 INIT_LIST_HEAD(&reaplist
);
4313 spin_lock(&recall_lock
);
4314 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4315 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4316 list_move(&dp
->dl_recall_lru
, &reaplist
);
4318 spin_unlock(&recall_lock
);
4319 list_for_each_safe(pos
, next
, &reaplist
) {
4320 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4321 list_del_init(&dp
->dl_recall_lru
);
4322 unhash_delegation(dp
);
4325 nfsd4_shutdown_recdir();
4329 nfs4_state_shutdown(void)
4331 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
4332 destroy_workqueue(laundry_wq
);
4333 locks_end_grace(&nfsd4_manager
);
4335 nfs4_release_reclaim();
4336 __nfs4_state_shutdown();
4337 nfs4_unlock_state();
4338 nfsd4_destroy_callback_queue();
4342 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4343 * accessed when nfsd is starting.
4346 nfs4_set_recdir(char *recdir
)
4348 strcpy(user_recovery_dirname
, recdir
);
4352 * Change the NFSv4 recovery directory to recdir.
4355 nfs4_reset_recoverydir(char *recdir
)
4360 status
= kern_path(recdir
, LOOKUP_FOLLOW
, &path
);
4364 if (S_ISDIR(path
.dentry
->d_inode
->i_mode
)) {
4365 nfs4_set_recdir(recdir
);
4373 nfs4_recoverydir(void)
4375 return user_recovery_dirname
;