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/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
42 #include <linux/sunrpc/clnt.h>
46 #define NFSDDBG_FACILITY NFSDDBG_PROC
49 time_t nfsd4_lease
= 90; /* default lease time */
50 time_t nfsd4_grace
= 90;
51 static time_t boot_time
;
52 static u32 current_ownerid
= 1;
53 static u32 current_fileid
= 1;
54 static u32 current_delegid
= 1;
55 static stateid_t zerostateid
; /* bits all 0 */
56 static stateid_t onestateid
; /* bits all 1 */
57 static u64 current_sessionid
= 1;
59 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
60 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
62 /* forward declarations */
63 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
64 static struct nfs4_delegation
* search_for_delegation(stateid_t
*stid
);
65 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
66 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
);
70 /* Currently used for almost all code touching nfsv4 state: */
71 static DEFINE_MUTEX(client_mutex
);
74 * Currently used for the del_recall_lru and file hash table. In an
75 * effort to decrease the scope of the client_mutex, this spinlock may
76 * eventually cover more:
78 static DEFINE_SPINLOCK(recall_lock
);
80 static struct kmem_cache
*stateowner_slab
= NULL
;
81 static struct kmem_cache
*file_slab
= NULL
;
82 static struct kmem_cache
*stateid_slab
= NULL
;
83 static struct kmem_cache
*deleg_slab
= NULL
;
88 mutex_lock(&client_mutex
);
92 nfs4_unlock_state(void)
94 mutex_unlock(&client_mutex
);
98 opaque_hashval(const void *ptr
, int nbytes
)
100 unsigned char *cptr
= (unsigned char *) ptr
;
110 static struct list_head del_recall_lru
;
113 put_nfs4_file(struct nfs4_file
*fi
)
115 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
116 list_del(&fi
->fi_hash
);
117 spin_unlock(&recall_lock
);
119 kmem_cache_free(file_slab
, fi
);
124 get_nfs4_file(struct nfs4_file
*fi
)
126 atomic_inc(&fi
->fi_ref
);
129 static int num_delegations
;
130 unsigned int max_delegations
;
133 * Open owner state (share locks)
136 /* hash tables for open owners */
137 #define OPEN_OWNER_HASH_BITS 8
138 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
139 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
141 static unsigned int open_ownerid_hashval(const u32 id
)
143 return id
& OPEN_OWNER_HASH_MASK
;
146 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
150 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
152 return ret
& OPEN_OWNER_HASH_MASK
;
155 static struct list_head open_ownerid_hashtbl
[OPEN_OWNER_HASH_SIZE
];
156 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
158 /* hash table for nfs4_file */
159 #define FILE_HASH_BITS 8
160 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
162 /* hash table for (open)nfs4_stateid */
163 #define STATEID_HASH_BITS 10
164 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
165 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
167 static unsigned int file_hashval(struct inode
*ino
)
169 /* XXX: why are we hashing on inode pointer, anyway? */
170 return hash_ptr(ino
, FILE_HASH_BITS
);
173 static unsigned int stateid_hashval(u32 owner_id
, u32 file_id
)
175 return (owner_id
+ file_id
) & STATEID_HASH_MASK
;
178 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
179 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
181 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
183 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
184 atomic_inc(&fp
->fi_access
[oflag
]);
187 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
189 if (oflag
== O_RDWR
) {
190 __nfs4_file_get_access(fp
, O_RDONLY
);
191 __nfs4_file_get_access(fp
, O_WRONLY
);
193 __nfs4_file_get_access(fp
, oflag
);
196 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
198 if (fp
->fi_fds
[oflag
]) {
199 fput(fp
->fi_fds
[oflag
]);
200 fp
->fi_fds
[oflag
] = NULL
;
204 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
206 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
207 nfs4_file_put_fd(fp
, O_RDWR
);
208 nfs4_file_put_fd(fp
, oflag
);
212 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
214 if (oflag
== O_RDWR
) {
215 __nfs4_file_put_access(fp
, O_RDONLY
);
216 __nfs4_file_put_access(fp
, O_WRONLY
);
218 __nfs4_file_put_access(fp
, oflag
);
221 static struct nfs4_delegation
*
222 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
224 struct nfs4_delegation
*dp
;
225 struct nfs4_file
*fp
= stp
->st_file
;
227 dprintk("NFSD alloc_init_deleg\n");
229 * Major work on the lease subsystem (for example, to support
230 * calbacks on stat) will be required before we can support
231 * write delegations properly.
233 if (type
!= NFS4_OPEN_DELEGATE_READ
)
235 if (fp
->fi_had_conflict
)
237 if (num_delegations
> max_delegations
)
239 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
243 INIT_LIST_HEAD(&dp
->dl_perfile
);
244 INIT_LIST_HEAD(&dp
->dl_perclnt
);
245 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
250 dp
->dl_stateid
.si_boot
= boot_time
;
251 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
252 dp
->dl_stateid
.si_fileid
= 0;
253 dp
->dl_stateid
.si_generation
= 1;
254 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
256 atomic_set(&dp
->dl_count
, 1);
257 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
262 nfs4_put_delegation(struct nfs4_delegation
*dp
)
264 if (atomic_dec_and_test(&dp
->dl_count
)) {
265 dprintk("NFSD: freeing dp %p\n",dp
);
266 put_nfs4_file(dp
->dl_file
);
267 kmem_cache_free(deleg_slab
, dp
);
272 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
274 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
275 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
277 fput(fp
->fi_deleg_file
);
278 fp
->fi_deleg_file
= NULL
;
282 /* Called under the state lock. */
284 unhash_delegation(struct nfs4_delegation
*dp
)
286 list_del_init(&dp
->dl_perclnt
);
287 spin_lock(&recall_lock
);
288 list_del_init(&dp
->dl_perfile
);
289 list_del_init(&dp
->dl_recall_lru
);
290 spin_unlock(&recall_lock
);
291 nfs4_put_deleg_lease(dp
->dl_file
);
292 nfs4_put_delegation(dp
);
299 /* client_lock protects the client lru list and session hash table */
300 static DEFINE_SPINLOCK(client_lock
);
302 /* Hash tables for nfs4_clientid state */
303 #define CLIENT_HASH_BITS 4
304 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
305 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
307 static unsigned int clientid_hashval(u32 id
)
309 return id
& CLIENT_HASH_MASK
;
312 static unsigned int clientstr_hashval(const char *name
)
314 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
318 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
319 * used in reboot/reset lease grace period processing
321 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
322 * setclientid_confirmed info.
324 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
327 * client_lru holds client queue ordered by nfs4_client.cl_time
330 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
331 * for last close replay.
333 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
334 static int reclaim_str_hashtbl_size
= 0;
335 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
336 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
337 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
338 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
339 static struct list_head client_lru
;
340 static struct list_head close_lru
;
343 * We store the NONE, READ, WRITE, and BOTH bits separately in the
344 * st_{access,deny}_bmap field of the stateid, in order to track not
345 * only what share bits are currently in force, but also what
346 * combinations of share bits previous opens have used. This allows us
347 * to enforce the recommendation of rfc 3530 14.2.19 that the server
348 * return an error if the client attempt to downgrade to a combination
349 * of share bits not explicable by closing some of its previous opens.
351 * XXX: This enforcement is actually incomplete, since we don't keep
352 * track of access/deny bit combinations; so, e.g., we allow:
354 * OPEN allow read, deny write
355 * OPEN allow both, deny none
356 * DOWNGRADE allow read, deny none
358 * which we should reject.
361 set_access(unsigned int *access
, unsigned long bmap
) {
365 for (i
= 1; i
< 4; i
++) {
366 if (test_bit(i
, &bmap
))
372 set_deny(unsigned int *deny
, unsigned long bmap
) {
376 for (i
= 0; i
< 4; i
++) {
377 if (test_bit(i
, &bmap
))
383 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
384 unsigned int access
, deny
;
386 set_access(&access
, stp
->st_access_bmap
);
387 set_deny(&deny
, stp
->st_deny_bmap
);
388 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
393 static int nfs4_access_to_omode(u32 access
)
395 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
396 case NFS4_SHARE_ACCESS_READ
:
398 case NFS4_SHARE_ACCESS_WRITE
:
400 case NFS4_SHARE_ACCESS_BOTH
:
406 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
408 list_del(&stp
->st_hash
);
409 list_del(&stp
->st_perfile
);
410 list_del(&stp
->st_perstateowner
);
413 static void free_generic_stateid(struct nfs4_stateid
*stp
)
417 if (stp
->st_access_bmap
) {
418 for (i
= 1; i
< 4; i
++) {
419 if (test_bit(i
, &stp
->st_access_bmap
))
420 nfs4_file_put_access(stp
->st_file
,
421 nfs4_access_to_omode(i
));
424 put_nfs4_file(stp
->st_file
);
425 kmem_cache_free(stateid_slab
, stp
);
428 static void release_lock_stateid(struct nfs4_stateid
*stp
)
432 unhash_generic_stateid(stp
);
433 file
= find_any_file(stp
->st_file
);
435 locks_remove_posix(file
, (fl_owner_t
)stp
->st_stateowner
);
436 free_generic_stateid(stp
);
439 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
441 struct nfs4_stateid
*stp
;
443 list_del(&sop
->so_idhash
);
444 list_del(&sop
->so_strhash
);
445 list_del(&sop
->so_perstateid
);
446 while (!list_empty(&sop
->so_stateids
)) {
447 stp
= list_first_entry(&sop
->so_stateids
,
448 struct nfs4_stateid
, st_perstateowner
);
449 release_lock_stateid(stp
);
453 static void release_lockowner(struct nfs4_stateowner
*sop
)
455 unhash_lockowner(sop
);
456 nfs4_free_stateowner(sop
);
460 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
462 struct nfs4_stateowner
*lock_sop
;
464 while (!list_empty(&open_stp
->st_lockowners
)) {
465 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
466 struct nfs4_stateowner
, so_perstateid
);
467 /* list_del(&open_stp->st_lockowners); */
468 BUG_ON(lock_sop
->so_is_open_owner
);
469 release_lockowner(lock_sop
);
473 static void release_open_stateid(struct nfs4_stateid
*stp
)
475 unhash_generic_stateid(stp
);
476 release_stateid_lockowners(stp
);
477 free_generic_stateid(stp
);
480 static void unhash_openowner(struct nfs4_stateowner
*sop
)
482 struct nfs4_stateid
*stp
;
484 list_del(&sop
->so_idhash
);
485 list_del(&sop
->so_strhash
);
486 list_del(&sop
->so_perclient
);
487 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
488 while (!list_empty(&sop
->so_stateids
)) {
489 stp
= list_first_entry(&sop
->so_stateids
,
490 struct nfs4_stateid
, st_perstateowner
);
491 release_open_stateid(stp
);
495 static void release_openowner(struct nfs4_stateowner
*sop
)
497 unhash_openowner(sop
);
498 list_del(&sop
->so_close_lru
);
499 nfs4_free_stateowner(sop
);
502 #define SESSION_HASH_SIZE 512
503 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
506 hash_sessionid(struct nfs4_sessionid
*sessionid
)
508 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
510 return sid
->sequence
% SESSION_HASH_SIZE
;
514 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
516 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
517 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
521 gen_sessionid(struct nfsd4_session
*ses
)
523 struct nfs4_client
*clp
= ses
->se_client
;
524 struct nfsd4_sessionid
*sid
;
526 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
527 sid
->clientid
= clp
->cl_clientid
;
528 sid
->sequence
= current_sessionid
++;
533 * The protocol defines ca_maxresponssize_cached to include the size of
534 * the rpc header, but all we need to cache is the data starting after
535 * the end of the initial SEQUENCE operation--the rest we regenerate
536 * each time. Therefore we can advertise a ca_maxresponssize_cached
537 * value that is the number of bytes in our cache plus a few additional
538 * bytes. In order to stay on the safe side, and not promise more than
539 * we can cache, those additional bytes must be the minimum possible: 24
540 * bytes of rpc header (xid through accept state, with AUTH_NULL
541 * verifier), 12 for the compound header (with zero-length tag), and 44
542 * for the SEQUENCE op response:
544 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
547 free_session_slots(struct nfsd4_session
*ses
)
551 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
552 kfree(ses
->se_slots
[i
]);
556 * We don't actually need to cache the rpc and session headers, so we
557 * can allocate a little less for each slot:
559 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
561 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
564 static int nfsd4_sanitize_slot_size(u32 size
)
566 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
567 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
573 * XXX: If we run out of reserved DRC memory we could (up to a point)
574 * re-negotiate active sessions and reduce their slot usage to make
575 * rooom for new connections. For now we just fail the create session.
577 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
581 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
583 spin_lock(&nfsd_drc_lock
);
584 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
585 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
586 num
= min_t(int, num
, avail
/ slotsize
);
587 nfsd_drc_mem_used
+= num
* slotsize
;
588 spin_unlock(&nfsd_drc_lock
);
593 static void nfsd4_put_drc_mem(int slotsize
, int num
)
595 spin_lock(&nfsd_drc_lock
);
596 nfsd_drc_mem_used
-= slotsize
* num
;
597 spin_unlock(&nfsd_drc_lock
);
600 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
602 struct nfsd4_session
*new;
605 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
606 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
607 mem
= numslots
* sizeof(struct nfsd4_slot
*);
609 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
612 /* allocate each struct nfsd4_slot and data cache in one piece */
613 for (i
= 0; i
< numslots
; i
++) {
614 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
615 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
616 if (!new->se_slots
[i
])
622 kfree(new->se_slots
[i
]);
627 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
629 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
631 new->maxreqs
= numslots
;
632 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
633 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
634 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
635 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
636 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
639 static void free_conn(struct nfsd4_conn
*c
)
641 svc_xprt_put(c
->cn_xprt
);
645 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
647 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
648 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
650 spin_lock(&clp
->cl_lock
);
651 if (!list_empty(&c
->cn_persession
)) {
652 list_del(&c
->cn_persession
);
655 spin_unlock(&clp
->cl_lock
);
656 nfsd4_probe_callback(clp
);
659 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
661 struct nfsd4_conn
*conn
;
663 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
666 svc_xprt_get(rqstp
->rq_xprt
);
667 conn
->cn_xprt
= rqstp
->rq_xprt
;
668 conn
->cn_flags
= flags
;
669 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
673 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
675 conn
->cn_session
= ses
;
676 list_add(&conn
->cn_persession
, &ses
->se_conns
);
679 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
681 struct nfs4_client
*clp
= ses
->se_client
;
683 spin_lock(&clp
->cl_lock
);
684 __nfsd4_hash_conn(conn
, ses
);
685 spin_unlock(&clp
->cl_lock
);
688 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
690 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
691 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
694 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
696 struct nfsd4_conn
*conn
;
699 conn
= alloc_conn(rqstp
, dir
);
701 return nfserr_jukebox
;
702 nfsd4_hash_conn(conn
, ses
);
703 ret
= nfsd4_register_conn(conn
);
705 /* oops; xprt is already down: */
706 nfsd4_conn_lost(&conn
->cn_xpt_user
);
710 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
712 u32 dir
= NFS4_CDFC4_FORE
;
714 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
715 dir
|= NFS4_CDFC4_BACK
;
717 return nfsd4_new_conn(rqstp
, ses
, dir
);
720 /* must be called under client_lock */
721 static void nfsd4_del_conns(struct nfsd4_session
*s
)
723 struct nfs4_client
*clp
= s
->se_client
;
724 struct nfsd4_conn
*c
;
726 spin_lock(&clp
->cl_lock
);
727 while (!list_empty(&s
->se_conns
)) {
728 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
729 list_del_init(&c
->cn_persession
);
730 spin_unlock(&clp
->cl_lock
);
732 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
735 spin_lock(&clp
->cl_lock
);
737 spin_unlock(&clp
->cl_lock
);
740 void free_session(struct kref
*kref
)
742 struct nfsd4_session
*ses
;
745 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
746 nfsd4_del_conns(ses
);
747 spin_lock(&nfsd_drc_lock
);
748 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
749 nfsd_drc_mem_used
-= mem
;
750 spin_unlock(&nfsd_drc_lock
);
751 free_session_slots(ses
);
755 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
757 struct nfsd4_session
*new;
758 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
759 int numslots
, slotsize
;
764 * Note decreasing slot size below client's request may
765 * make it difficult for client to function correctly, whereas
766 * decreasing the number of slots will (just?) affect
767 * performance. When short on memory we therefore prefer to
768 * decrease number of slots instead of their size.
770 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
771 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
775 new = alloc_session(slotsize
, numslots
);
777 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
780 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
782 new->se_client
= clp
;
785 INIT_LIST_HEAD(&new->se_conns
);
787 new->se_cb_seq_nr
= 1;
788 new->se_flags
= cses
->flags
;
789 new->se_cb_prog
= cses
->callback_prog
;
790 kref_init(&new->se_ref
);
791 idx
= hash_sessionid(&new->se_sessionid
);
792 spin_lock(&client_lock
);
793 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
794 spin_lock(&clp
->cl_lock
);
795 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
796 spin_unlock(&clp
->cl_lock
);
797 spin_unlock(&client_lock
);
799 status
= nfsd4_new_conn_from_crses(rqstp
, new);
800 /* whoops: benny points out, status is ignored! (err, or bogus) */
802 free_session(&new->se_ref
);
805 if (cses
->flags
& SESSION4_BACK_CHAN
) {
806 struct sockaddr
*sa
= svc_addr(rqstp
);
808 * This is a little silly; with sessions there's no real
809 * use for the callback address. Use the peer address
810 * as a reasonable default for now, but consider fixing
811 * the rpc client not to require an address in the
814 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
815 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
817 nfsd4_probe_callback(clp
);
821 /* caller must hold client_lock */
822 static struct nfsd4_session
*
823 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
825 struct nfsd4_session
*elem
;
828 dump_sessionid(__func__
, sessionid
);
829 idx
= hash_sessionid(sessionid
);
830 /* Search in the appropriate list */
831 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
832 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
833 NFS4_MAX_SESSIONID_LEN
)) {
838 dprintk("%s: session not found\n", __func__
);
842 /* caller must hold client_lock */
844 unhash_session(struct nfsd4_session
*ses
)
846 list_del(&ses
->se_hash
);
847 spin_lock(&ses
->se_client
->cl_lock
);
848 list_del(&ses
->se_perclnt
);
849 spin_unlock(&ses
->se_client
->cl_lock
);
852 /* must be called under the client_lock */
854 renew_client_locked(struct nfs4_client
*clp
)
856 if (is_client_expired(clp
)) {
857 dprintk("%s: client (clientid %08x/%08x) already expired\n",
859 clp
->cl_clientid
.cl_boot
,
860 clp
->cl_clientid
.cl_id
);
865 * Move client to the end to the LRU list.
867 dprintk("renewing client (clientid %08x/%08x)\n",
868 clp
->cl_clientid
.cl_boot
,
869 clp
->cl_clientid
.cl_id
);
870 list_move_tail(&clp
->cl_lru
, &client_lru
);
871 clp
->cl_time
= get_seconds();
875 renew_client(struct nfs4_client
*clp
)
877 spin_lock(&client_lock
);
878 renew_client_locked(clp
);
879 spin_unlock(&client_lock
);
882 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
884 STALE_CLIENTID(clientid_t
*clid
)
886 if (clid
->cl_boot
== boot_time
)
888 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
889 clid
->cl_boot
, clid
->cl_id
, boot_time
);
894 * XXX Should we use a slab cache ?
895 * This type of memory management is somewhat inefficient, but we use it
896 * anyway since SETCLIENTID is not a common operation.
898 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
900 struct nfs4_client
*clp
;
902 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
905 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
906 if (clp
->cl_name
.data
== NULL
) {
910 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
911 clp
->cl_name
.len
= name
.len
;
916 free_client(struct nfs4_client
*clp
)
918 while (!list_empty(&clp
->cl_sessions
)) {
919 struct nfsd4_session
*ses
;
920 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
922 list_del(&ses
->se_perclnt
);
923 nfsd4_put_session(ses
);
925 if (clp
->cl_cred
.cr_group_info
)
926 put_group_info(clp
->cl_cred
.cr_group_info
);
927 kfree(clp
->cl_principal
);
928 kfree(clp
->cl_name
.data
);
933 release_session_client(struct nfsd4_session
*session
)
935 struct nfs4_client
*clp
= session
->se_client
;
937 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
939 if (is_client_expired(clp
)) {
941 session
->se_client
= NULL
;
943 renew_client_locked(clp
);
944 spin_unlock(&client_lock
);
947 /* must be called under the client_lock */
949 unhash_client_locked(struct nfs4_client
*clp
)
951 struct nfsd4_session
*ses
;
953 mark_client_expired(clp
);
954 list_del(&clp
->cl_lru
);
955 spin_lock(&clp
->cl_lock
);
956 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
957 list_del_init(&ses
->se_hash
);
958 spin_unlock(&clp
->cl_lock
);
962 expire_client(struct nfs4_client
*clp
)
964 struct nfs4_stateowner
*sop
;
965 struct nfs4_delegation
*dp
;
966 struct list_head reaplist
;
968 INIT_LIST_HEAD(&reaplist
);
969 spin_lock(&recall_lock
);
970 while (!list_empty(&clp
->cl_delegations
)) {
971 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
972 list_del_init(&dp
->dl_perclnt
);
973 list_move(&dp
->dl_recall_lru
, &reaplist
);
975 spin_unlock(&recall_lock
);
976 while (!list_empty(&reaplist
)) {
977 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
978 list_del_init(&dp
->dl_recall_lru
);
979 unhash_delegation(dp
);
981 while (!list_empty(&clp
->cl_openowners
)) {
982 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
983 release_openowner(sop
);
985 nfsd4_shutdown_callback(clp
);
986 if (clp
->cl_cb_conn
.cb_xprt
)
987 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
988 list_del(&clp
->cl_idhash
);
989 list_del(&clp
->cl_strhash
);
990 spin_lock(&client_lock
);
991 unhash_client_locked(clp
);
992 if (atomic_read(&clp
->cl_refcount
) == 0)
994 spin_unlock(&client_lock
);
997 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
999 memcpy(target
->cl_verifier
.data
, source
->data
,
1000 sizeof(target
->cl_verifier
.data
));
1003 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1005 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1006 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1009 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1011 target
->cr_uid
= source
->cr_uid
;
1012 target
->cr_gid
= source
->cr_gid
;
1013 target
->cr_group_info
= source
->cr_group_info
;
1014 get_group_info(target
->cr_group_info
);
1017 static int same_name(const char *n1
, const char *n2
)
1019 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1023 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1025 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1029 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1031 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1034 /* XXX what about NGROUP */
1036 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1038 return cr1
->cr_uid
== cr2
->cr_uid
;
1041 static void gen_clid(struct nfs4_client
*clp
)
1043 static u32 current_clientid
= 1;
1045 clp
->cl_clientid
.cl_boot
= boot_time
;
1046 clp
->cl_clientid
.cl_id
= current_clientid
++;
1049 static void gen_confirm(struct nfs4_client
*clp
)
1054 p
= (u32
*)clp
->cl_confirm
.data
;
1055 *p
++ = get_seconds();
1059 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1060 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1062 struct nfs4_client
*clp
;
1063 struct sockaddr
*sa
= svc_addr(rqstp
);
1066 clp
= alloc_client(name
);
1070 INIT_LIST_HEAD(&clp
->cl_sessions
);
1072 princ
= svc_gss_principal(rqstp
);
1074 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1075 if (clp
->cl_principal
== NULL
) {
1081 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1082 atomic_set(&clp
->cl_refcount
, 0);
1083 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1084 INIT_LIST_HEAD(&clp
->cl_idhash
);
1085 INIT_LIST_HEAD(&clp
->cl_strhash
);
1086 INIT_LIST_HEAD(&clp
->cl_openowners
);
1087 INIT_LIST_HEAD(&clp
->cl_delegations
);
1088 INIT_LIST_HEAD(&clp
->cl_lru
);
1089 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1090 spin_lock_init(&clp
->cl_lock
);
1091 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1092 clp
->cl_time
= get_seconds();
1093 clear_bit(0, &clp
->cl_cb_slot_busy
);
1094 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1095 copy_verf(clp
, verf
);
1096 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1097 clp
->cl_flavor
= rqstp
->rq_flavor
;
1098 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1100 clp
->cl_cb_session
= NULL
;
1104 static int check_name(struct xdr_netobj name
)
1108 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1109 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1116 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1118 unsigned int idhashval
;
1120 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1121 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1122 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1127 move_to_confirmed(struct nfs4_client
*clp
)
1129 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1130 unsigned int strhashval
;
1132 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1133 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1134 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1135 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1139 static struct nfs4_client
*
1140 find_confirmed_client(clientid_t
*clid
)
1142 struct nfs4_client
*clp
;
1143 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1145 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1146 if (same_clid(&clp
->cl_clientid
, clid
))
1152 static struct nfs4_client
*
1153 find_unconfirmed_client(clientid_t
*clid
)
1155 struct nfs4_client
*clp
;
1156 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1158 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1159 if (same_clid(&clp
->cl_clientid
, clid
))
1165 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1167 return clp
->cl_exchange_flags
!= 0;
1170 static struct nfs4_client
*
1171 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1173 struct nfs4_client
*clp
;
1175 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1176 if (same_name(clp
->cl_recdir
, dname
))
1182 static struct nfs4_client
*
1183 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1185 struct nfs4_client
*clp
;
1187 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1188 if (same_name(clp
->cl_recdir
, dname
))
1194 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1198 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1199 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1202 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1203 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1209 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1211 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1212 struct sockaddr
*sa
= svc_addr(rqstp
);
1213 u32 scopeid
= rpc_get_scope_id(sa
);
1214 unsigned short expected_family
;
1216 /* Currently, we only support tcp and tcp6 for the callback channel */
1217 if (se
->se_callback_netid_len
== 3 &&
1218 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1219 expected_family
= AF_INET
;
1220 else if (se
->se_callback_netid_len
== 4 &&
1221 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1222 expected_family
= AF_INET6
;
1226 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1227 se
->se_callback_addr_len
,
1228 (struct sockaddr
*)&conn
->cb_addr
,
1229 sizeof(conn
->cb_addr
));
1231 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1234 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1235 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1237 conn
->cb_prog
= se
->se_callback_prog
;
1238 conn
->cb_ident
= se
->se_callback_ident
;
1239 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1242 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1243 conn
->cb_addrlen
= 0;
1244 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1245 "will not receive delegations\n",
1246 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1252 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1255 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1257 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1260 dprintk("--> %s slot %p\n", __func__
, slot
);
1262 slot
->sl_opcnt
= resp
->opcnt
;
1263 slot
->sl_status
= resp
->cstate
.status
;
1265 if (nfsd4_not_cached(resp
)) {
1266 slot
->sl_datalen
= 0;
1269 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1270 base
= (char *)resp
->cstate
.datap
-
1271 (char *)resp
->xbuf
->head
[0].iov_base
;
1272 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1274 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1279 * Encode the replay sequence operation from the slot values.
1280 * If cachethis is FALSE encode the uncached rep error on the next
1281 * operation which sets resp->p and increments resp->opcnt for
1282 * nfs4svc_encode_compoundres.
1286 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1287 struct nfsd4_compoundres
*resp
)
1289 struct nfsd4_op
*op
;
1290 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1292 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1293 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1295 /* Encode the replayed sequence operation */
1296 op
= &args
->ops
[resp
->opcnt
- 1];
1297 nfsd4_encode_operation(resp
, op
);
1299 /* Return nfserr_retry_uncached_rep in next operation. */
1300 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1301 op
= &args
->ops
[resp
->opcnt
++];
1302 op
->status
= nfserr_retry_uncached_rep
;
1303 nfsd4_encode_operation(resp
, op
);
1309 * The sequence operation is not cached because we can use the slot and
1313 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1314 struct nfsd4_sequence
*seq
)
1316 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1319 dprintk("--> %s slot %p\n", __func__
, slot
);
1321 /* Either returns 0 or nfserr_retry_uncached */
1322 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1323 if (status
== nfserr_retry_uncached_rep
)
1326 /* The sequence operation has been encoded, cstate->datap set. */
1327 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1329 resp
->opcnt
= slot
->sl_opcnt
;
1330 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1331 status
= slot
->sl_status
;
1337 * Set the exchange_id flags returned by the server.
1340 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1342 /* pNFS is not supported */
1343 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1345 /* Referrals are supported, Migration is not. */
1346 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1348 /* set the wire flags to return to client. */
1349 clid
->flags
= new->cl_exchange_flags
;
1353 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1354 struct nfsd4_compound_state
*cstate
,
1355 struct nfsd4_exchange_id
*exid
)
1357 struct nfs4_client
*unconf
, *conf
, *new;
1359 unsigned int strhashval
;
1360 char dname
[HEXDIR_LEN
];
1361 char addr_str
[INET6_ADDRSTRLEN
];
1362 nfs4_verifier verf
= exid
->verifier
;
1363 struct sockaddr
*sa
= svc_addr(rqstp
);
1365 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1366 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1367 "ip_addr=%s flags %x, spa_how %d\n",
1368 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1369 addr_str
, exid
->flags
, exid
->spa_how
);
1371 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1372 return nfserr_inval
;
1374 /* Currently only support SP4_NONE */
1375 switch (exid
->spa_how
) {
1379 return nfserr_serverfault
;
1381 BUG(); /* checked by xdr code */
1383 return nfserr_serverfault
; /* no excuse :-/ */
1386 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1391 strhashval
= clientstr_hashval(dname
);
1396 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1398 if (!clp_used_exchangeid(conf
)) {
1399 status
= nfserr_clid_inuse
; /* XXX: ? */
1402 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1403 /* 18.35.4 case 8 */
1404 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1405 status
= nfserr_not_same
;
1408 /* Client reboot: destroy old state */
1409 expire_client(conf
);
1412 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1413 /* 18.35.4 case 9 */
1414 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1415 status
= nfserr_perm
;
1418 expire_client(conf
);
1422 * Set bit when the owner id and verifier map to an already
1423 * confirmed client id (18.35.3).
1425 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1428 * Falling into 18.35.4 case 2, possible router replay.
1429 * Leave confirmed record intact and return same result.
1431 copy_verf(conf
, &verf
);
1436 /* 18.35.4 case 7 */
1437 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1438 status
= nfserr_noent
;
1442 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1445 * Possible retry or client restart. Per 18.35.4 case 4,
1446 * a new unconfirmed record should be generated regardless
1447 * of whether any properties have changed.
1449 expire_client(unconf
);
1454 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1456 status
= nfserr_jukebox
;
1461 add_to_unconfirmed(new, strhashval
);
1463 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1464 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1467 nfsd4_set_ex_flags(new, exid
);
1469 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1470 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1474 nfs4_unlock_state();
1476 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1481 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1483 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1486 /* The slot is in use, and no response has been sent. */
1488 if (seqid
== slot_seqid
)
1489 return nfserr_jukebox
;
1491 return nfserr_seq_misordered
;
1494 if (likely(seqid
== slot_seqid
+ 1))
1497 if (seqid
== slot_seqid
)
1498 return nfserr_replay_cache
;
1500 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1502 /* Misordered replay or misordered new request */
1503 return nfserr_seq_misordered
;
1507 * Cache the create session result into the create session single DRC
1508 * slot cache by saving the xdr structure. sl_seqid has been set.
1509 * Do this for solo or embedded create session operations.
1512 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1513 struct nfsd4_clid_slot
*slot
, int nfserr
)
1515 slot
->sl_status
= nfserr
;
1516 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1520 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1521 struct nfsd4_clid_slot
*slot
)
1523 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1524 return slot
->sl_status
;
1527 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1528 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1529 1 + /* MIN tag is length with zero, only length */ \
1530 3 + /* version, opcount, opcode */ \
1531 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1532 /* seqid, slotID, slotID, cache */ \
1533 4 ) * sizeof(__be32))
1535 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1536 2 + /* verifier: AUTH_NULL, length 0 */\
1538 1 + /* MIN tag is length with zero, only length */ \
1539 3 + /* opcount, opcode, opstatus*/ \
1540 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1541 /* seqid, slotID, slotID, slotID, status */ \
1542 5 ) * sizeof(__be32))
1544 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1546 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1547 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1551 nfsd4_create_session(struct svc_rqst
*rqstp
,
1552 struct nfsd4_compound_state
*cstate
,
1553 struct nfsd4_create_session
*cr_ses
)
1555 struct sockaddr
*sa
= svc_addr(rqstp
);
1556 struct nfs4_client
*conf
, *unconf
;
1557 struct nfsd4_session
*new;
1558 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1559 bool confirm_me
= false;
1562 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1563 return nfserr_inval
;
1566 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1567 conf
= find_confirmed_client(&cr_ses
->clientid
);
1570 cs_slot
= &conf
->cl_cs_slot
;
1571 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1572 if (status
== nfserr_replay_cache
) {
1573 dprintk("Got a create_session replay! seqid= %d\n",
1575 /* Return the cached reply status */
1576 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1578 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1579 status
= nfserr_seq_misordered
;
1580 dprintk("Sequence misordered!\n");
1581 dprintk("Expected seqid= %d but got seqid= %d\n",
1582 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1585 } else if (unconf
) {
1586 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1587 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1588 status
= nfserr_clid_inuse
;
1592 cs_slot
= &unconf
->cl_cs_slot
;
1593 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1595 /* an unconfirmed replay returns misordered */
1596 status
= nfserr_seq_misordered
;
1603 status
= nfserr_stale_clientid
;
1608 * XXX: we should probably set this at creation time, and check
1609 * for consistent minorversion use throughout:
1611 conf
->cl_minorversion
= 1;
1613 * We do not support RDMA or persistent sessions
1615 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1616 cr_ses
->flags
&= ~SESSION4_RDMA
;
1618 status
= nfserr_toosmall
;
1619 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1622 status
= nfserr_jukebox
;
1623 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1627 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1628 NFS4_MAX_SESSIONID_LEN
);
1629 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1630 sizeof(struct nfsd4_channel_attrs
));
1631 cs_slot
->sl_seqid
++;
1632 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1634 /* cache solo and embedded create sessions under the state lock */
1635 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1637 move_to_confirmed(conf
);
1639 nfs4_unlock_state();
1640 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1644 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1646 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1647 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1649 return argp
->opcnt
== resp
->opcnt
;
1652 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1655 case NFS4_CDFC4_FORE
:
1656 case NFS4_CDFC4_BACK
:
1658 case NFS4_CDFC4_FORE_OR_BOTH
:
1659 case NFS4_CDFC4_BACK_OR_BOTH
:
1660 *dir
= NFS4_CDFC4_BOTH
;
1663 return nfserr_inval
;
1666 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1667 struct nfsd4_compound_state
*cstate
,
1668 struct nfsd4_bind_conn_to_session
*bcts
)
1672 if (!nfsd4_last_compound_op(rqstp
))
1673 return nfserr_not_only_op
;
1674 spin_lock(&client_lock
);
1675 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1676 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1677 * client_lock iself: */
1678 if (cstate
->session
) {
1679 nfsd4_get_session(cstate
->session
);
1680 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1682 spin_unlock(&client_lock
);
1683 if (!cstate
->session
)
1684 return nfserr_badsession
;
1686 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1688 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1692 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1696 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1700 nfsd4_destroy_session(struct svc_rqst
*r
,
1701 struct nfsd4_compound_state
*cstate
,
1702 struct nfsd4_destroy_session
*sessionid
)
1704 struct nfsd4_session
*ses
;
1705 u32 status
= nfserr_badsession
;
1708 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1709 * - Should we return nfserr_back_chan_busy if waiting for
1710 * callbacks on to-be-destroyed session?
1711 * - Do we need to clear any callback info from previous session?
1714 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1715 if (!nfsd4_last_compound_op(r
))
1716 return nfserr_not_only_op
;
1718 dump_sessionid(__func__
, &sessionid
->sessionid
);
1719 spin_lock(&client_lock
);
1720 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1722 spin_unlock(&client_lock
);
1726 unhash_session(ses
);
1727 spin_unlock(&client_lock
);
1730 nfsd4_probe_callback_sync(ses
->se_client
);
1731 nfs4_unlock_state();
1733 nfsd4_del_conns(ses
);
1735 nfsd4_put_session(ses
);
1738 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1742 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1744 struct nfsd4_conn
*c
;
1746 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1747 if (c
->cn_xprt
== xpt
) {
1754 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1756 struct nfs4_client
*clp
= ses
->se_client
;
1757 struct nfsd4_conn
*c
;
1760 spin_lock(&clp
->cl_lock
);
1761 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1763 spin_unlock(&clp
->cl_lock
);
1767 __nfsd4_hash_conn(new, ses
);
1768 spin_unlock(&clp
->cl_lock
);
1769 ret
= nfsd4_register_conn(new);
1771 /* oops; xprt is already down: */
1772 nfsd4_conn_lost(&new->cn_xpt_user
);
1776 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1778 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1780 return args
->opcnt
> session
->se_fchannel
.maxops
;
1783 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1784 struct nfsd4_session
*session
)
1786 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1788 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1792 nfsd4_sequence(struct svc_rqst
*rqstp
,
1793 struct nfsd4_compound_state
*cstate
,
1794 struct nfsd4_sequence
*seq
)
1796 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1797 struct nfsd4_session
*session
;
1798 struct nfsd4_slot
*slot
;
1799 struct nfsd4_conn
*conn
;
1802 if (resp
->opcnt
!= 1)
1803 return nfserr_sequence_pos
;
1806 * Will be either used or freed by nfsd4_sequence_check_conn
1809 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1811 return nfserr_jukebox
;
1813 spin_lock(&client_lock
);
1814 status
= nfserr_badsession
;
1815 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1819 status
= nfserr_too_many_ops
;
1820 if (nfsd4_session_too_many_ops(rqstp
, session
))
1823 status
= nfserr_req_too_big
;
1824 if (nfsd4_request_too_big(rqstp
, session
))
1827 status
= nfserr_badslot
;
1828 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1831 slot
= session
->se_slots
[seq
->slotid
];
1832 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1834 /* We do not negotiate the number of slots yet, so set the
1835 * maxslots to the session maxreqs which is used to encode
1836 * sr_highest_slotid and the sr_target_slot id to maxslots */
1837 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1839 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1840 if (status
== nfserr_replay_cache
) {
1841 cstate
->slot
= slot
;
1842 cstate
->session
= session
;
1843 /* Return the cached reply status and set cstate->status
1844 * for nfsd4_proc_compound processing */
1845 status
= nfsd4_replay_cache_entry(resp
, seq
);
1846 cstate
->status
= nfserr_replay_cache
;
1852 nfsd4_sequence_check_conn(conn
, session
);
1855 /* Success! bump slot seqid */
1856 slot
->sl_inuse
= true;
1857 slot
->sl_seqid
= seq
->seqid
;
1858 slot
->sl_cachethis
= seq
->cachethis
;
1860 cstate
->slot
= slot
;
1861 cstate
->session
= session
;
1864 /* Hold a session reference until done processing the compound. */
1865 if (cstate
->session
) {
1866 struct nfs4_client
*clp
= session
->se_client
;
1868 nfsd4_get_session(cstate
->session
);
1869 atomic_inc(&clp
->cl_refcount
);
1870 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1871 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1874 spin_unlock(&client_lock
);
1875 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1880 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1884 if (rc
->rca_one_fs
) {
1885 if (!cstate
->current_fh
.fh_dentry
)
1886 return nfserr_nofilehandle
;
1888 * We don't take advantage of the rca_one_fs case.
1889 * That's OK, it's optional, we can safely ignore it.
1895 status
= nfserr_complete_already
;
1896 if (cstate
->session
->se_client
->cl_firststate
)
1899 status
= nfserr_stale_clientid
;
1900 if (is_client_expired(cstate
->session
->se_client
))
1902 * The following error isn't really legal.
1903 * But we only get here if the client just explicitly
1904 * destroyed the client. Surely it no longer cares what
1905 * error it gets back on an operation for the dead
1911 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1913 nfs4_unlock_state();
1918 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1919 struct nfsd4_setclientid
*setclid
)
1921 struct xdr_netobj clname
= {
1922 .len
= setclid
->se_namelen
,
1923 .data
= setclid
->se_name
,
1925 nfs4_verifier clverifier
= setclid
->se_verf
;
1926 unsigned int strhashval
;
1927 struct nfs4_client
*conf
, *unconf
, *new;
1929 char dname
[HEXDIR_LEN
];
1931 if (!check_name(clname
))
1932 return nfserr_inval
;
1934 status
= nfs4_make_rec_clidname(dname
, &clname
);
1939 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1940 * We get here on a DRC miss.
1943 strhashval
= clientstr_hashval(dname
);
1946 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1948 /* RFC 3530 14.2.33 CASE 0: */
1949 status
= nfserr_clid_inuse
;
1950 if (clp_used_exchangeid(conf
))
1952 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1953 char addr_str
[INET6_ADDRSTRLEN
];
1954 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1956 dprintk("NFSD: setclientid: string in use by client "
1957 "at %s\n", addr_str
);
1962 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1963 * has a description of SETCLIENTID request processing consisting
1964 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1966 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1967 status
= nfserr_jukebox
;
1970 * RFC 3530 14.2.33 CASE 4:
1971 * placed first, because it is the normal case
1974 expire_client(unconf
);
1975 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1979 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1981 * RFC 3530 14.2.33 CASE 1:
1982 * probable callback update
1985 /* Note this is removing unconfirmed {*x***},
1986 * which is stronger than RFC recommended {vxc**}.
1987 * This has the advantage that there is at most
1988 * one {*x***} in either list at any time.
1990 expire_client(unconf
);
1992 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1995 copy_clid(new, conf
);
1996 } else if (!unconf
) {
1998 * RFC 3530 14.2.33 CASE 2:
1999 * probable client reboot; state will be removed if
2002 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2008 * RFC 3530 14.2.33 CASE 3:
2009 * probable client reboot; state will be removed if
2012 expire_client(unconf
);
2013 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2019 * XXX: we should probably set this at creation time, and check
2020 * for consistent minorversion use throughout:
2022 new->cl_minorversion
= 0;
2023 gen_callback(new, setclid
, rqstp
);
2024 add_to_unconfirmed(new, strhashval
);
2025 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2026 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2027 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2030 nfs4_unlock_state();
2036 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2037 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2038 * bullets, labeled as CASE1 - CASE4 below.
2041 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2042 struct nfsd4_compound_state
*cstate
,
2043 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2045 struct sockaddr
*sa
= svc_addr(rqstp
);
2046 struct nfs4_client
*conf
, *unconf
;
2047 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2048 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2051 if (STALE_CLIENTID(clid
))
2052 return nfserr_stale_clientid
;
2054 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2055 * We get here on a DRC miss.
2060 conf
= find_confirmed_client(clid
);
2061 unconf
= find_unconfirmed_client(clid
);
2063 status
= nfserr_clid_inuse
;
2064 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2066 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2070 * section 14.2.34 of RFC 3530 has a description of
2071 * SETCLIENTID_CONFIRM request processing consisting
2072 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2074 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2076 * RFC 3530 14.2.34 CASE 1:
2079 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2080 status
= nfserr_clid_inuse
;
2082 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2083 nfsd4_probe_callback(conf
);
2084 expire_client(unconf
);
2088 } else if (conf
&& !unconf
) {
2090 * RFC 3530 14.2.34 CASE 2:
2091 * probable retransmitted request; play it safe and
2094 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2095 status
= nfserr_clid_inuse
;
2098 } else if (!conf
&& unconf
2099 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2101 * RFC 3530 14.2.34 CASE 3:
2102 * Normal case; new or rebooted client:
2104 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2105 status
= nfserr_clid_inuse
;
2108 clientstr_hashval(unconf
->cl_recdir
);
2109 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2112 nfsd4_remove_clid_dir(conf
);
2113 expire_client(conf
);
2115 move_to_confirmed(unconf
);
2117 nfsd4_probe_callback(conf
);
2120 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2121 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2124 * RFC 3530 14.2.34 CASE 4:
2125 * Client probably hasn't noticed that we rebooted yet.
2127 status
= nfserr_stale_clientid
;
2129 /* check that we have hit one of the cases...*/
2130 status
= nfserr_clid_inuse
;
2133 nfs4_unlock_state();
2137 /* OPEN Share state helper functions */
2138 static inline struct nfs4_file
*
2139 alloc_init_file(struct inode
*ino
)
2141 struct nfs4_file
*fp
;
2142 unsigned int hashval
= file_hashval(ino
);
2144 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2146 atomic_set(&fp
->fi_ref
, 1);
2147 INIT_LIST_HEAD(&fp
->fi_hash
);
2148 INIT_LIST_HEAD(&fp
->fi_stateids
);
2149 INIT_LIST_HEAD(&fp
->fi_delegations
);
2150 fp
->fi_inode
= igrab(ino
);
2151 fp
->fi_id
= current_fileid
++;
2152 fp
->fi_had_conflict
= false;
2153 fp
->fi_lease
= NULL
;
2154 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2155 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2156 spin_lock(&recall_lock
);
2157 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2158 spin_unlock(&recall_lock
);
2165 nfsd4_free_slab(struct kmem_cache
**slab
)
2169 kmem_cache_destroy(*slab
);
2174 nfsd4_free_slabs(void)
2176 nfsd4_free_slab(&stateowner_slab
);
2177 nfsd4_free_slab(&file_slab
);
2178 nfsd4_free_slab(&stateid_slab
);
2179 nfsd4_free_slab(&deleg_slab
);
2183 nfsd4_init_slabs(void)
2185 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
2186 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
2187 if (stateowner_slab
== NULL
)
2189 file_slab
= kmem_cache_create("nfsd4_files",
2190 sizeof(struct nfs4_file
), 0, 0, NULL
);
2191 if (file_slab
== NULL
)
2193 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2194 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2195 if (stateid_slab
== NULL
)
2197 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2198 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2199 if (deleg_slab
== NULL
)
2204 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2209 nfs4_free_stateowner(struct nfs4_stateowner
*sop
)
2211 kfree(sop
->so_owner
.data
);
2212 kmem_cache_free(stateowner_slab
, sop
);
2215 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2217 rp
->rp_status
= nfserr_serverfault
;
2219 rp
->rp_buf
= rp
->rp_ibuf
;
2222 static inline struct nfs4_stateowner
*alloc_stateowner(struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2224 struct nfs4_stateowner
*sop
;
2226 sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
);
2230 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2231 if (!sop
->so_owner
.data
) {
2232 kmem_cache_free(stateowner_slab
, sop
);
2235 sop
->so_owner
.len
= owner
->len
;
2237 INIT_LIST_HEAD(&sop
->so_perclient
);
2238 INIT_LIST_HEAD(&sop
->so_stateids
);
2239 INIT_LIST_HEAD(&sop
->so_perstateid
);
2240 INIT_LIST_HEAD(&sop
->so_close_lru
);
2241 sop
->so_id
= current_ownerid
++;
2243 sop
->so_client
= clp
;
2244 init_nfs4_replay(&sop
->so_replay
);
2248 static void hash_openowner(struct nfs4_stateowner
*sop
, struct nfs4_client
*clp
, unsigned int strhashval
)
2250 unsigned int idhashval
;
2252 idhashval
= open_ownerid_hashval(sop
->so_id
);
2253 list_add(&sop
->so_idhash
, &open_ownerid_hashtbl
[idhashval
]);
2254 list_add(&sop
->so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2255 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
2258 static struct nfs4_stateowner
*
2259 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2260 struct nfs4_stateowner
*sop
;
2262 sop
= alloc_stateowner(&open
->op_owner
, clp
);
2265 sop
->so_is_open_owner
= 1;
2266 sop
->so_seqid
= open
->op_seqid
;
2267 sop
->so_confirmed
= 0;
2268 hash_openowner(sop
, clp
, strhashval
);
2273 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2274 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2275 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2277 INIT_LIST_HEAD(&stp
->st_hash
);
2278 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2279 INIT_LIST_HEAD(&stp
->st_lockowners
);
2280 INIT_LIST_HEAD(&stp
->st_perfile
);
2281 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2282 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2283 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2284 stp
->st_type
= NFS4_OPEN_STID
;
2285 stp
->st_stateowner
= sop
;
2288 stp
->st_stateid
.si_boot
= boot_time
;
2289 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2290 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2291 /* note will be incremented before first return to client: */
2292 stp
->st_stateid
.si_generation
= 0;
2293 stp
->st_access_bmap
= 0;
2294 stp
->st_deny_bmap
= 0;
2295 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2296 &stp
->st_access_bmap
);
2297 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2298 stp
->st_openstp
= NULL
;
2302 move_to_close_lru(struct nfs4_stateowner
*sop
)
2304 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
2306 list_move_tail(&sop
->so_close_lru
, &close_lru
);
2307 sop
->so_time
= get_seconds();
2311 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2314 return (sop
->so_owner
.len
== owner
->len
) &&
2315 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2316 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2319 static struct nfs4_stateowner
*
2320 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2322 struct nfs4_stateowner
*so
= NULL
;
2324 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2325 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2331 /* search file_hashtbl[] for file */
2332 static struct nfs4_file
*
2333 find_file(struct inode
*ino
)
2335 unsigned int hashval
= file_hashval(ino
);
2336 struct nfs4_file
*fp
;
2338 spin_lock(&recall_lock
);
2339 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2340 if (fp
->fi_inode
== ino
) {
2342 spin_unlock(&recall_lock
);
2346 spin_unlock(&recall_lock
);
2350 static inline int access_valid(u32 x
, u32 minorversion
)
2352 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2354 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2356 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2357 if (minorversion
&& x
) {
2358 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2360 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2362 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2369 static inline int deny_valid(u32 x
)
2371 /* Note: unlike access bits, deny bits may be zero. */
2372 return x
<= NFS4_SHARE_DENY_BOTH
;
2376 * Called to check deny when READ with all zero stateid or
2377 * WRITE with all zero or all one stateid
2380 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2382 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2383 struct nfs4_file
*fp
;
2384 struct nfs4_stateid
*stp
;
2387 dprintk("NFSD: nfs4_share_conflict\n");
2389 fp
= find_file(ino
);
2392 ret
= nfserr_locked
;
2393 /* Search for conflicting share reservations */
2394 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2395 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2396 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2405 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2407 /* We're assuming the state code never drops its reference
2408 * without first removing the lease. Since we're in this lease
2409 * callback (and since the lease code is serialized by the kernel
2410 * lock) we know the server hasn't removed the lease yet, we know
2411 * it's safe to take a reference: */
2412 atomic_inc(&dp
->dl_count
);
2414 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2416 /* only place dl_time is set. protected by lock_flocks*/
2417 dp
->dl_time
= get_seconds();
2419 nfsd4_cb_recall(dp
);
2422 /* Called from break_lease() with lock_flocks() held. */
2423 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2425 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2426 struct nfs4_delegation
*dp
;
2429 /* We assume break_lease is only called once per lease: */
2430 BUG_ON(fp
->fi_had_conflict
);
2432 * We don't want the locks code to timeout the lease for us;
2433 * we'll remove it ourself if a delegation isn't returned
2436 fl
->fl_break_time
= 0;
2438 spin_lock(&recall_lock
);
2439 fp
->fi_had_conflict
= true;
2440 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2441 nfsd_break_one_deleg(dp
);
2442 spin_unlock(&recall_lock
);
2446 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2449 return lease_modify(onlist
, arg
);
2454 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2455 .lm_break
= nfsd_break_deleg_cb
,
2456 .lm_change
= nfsd_change_deleg_cb
,
2459 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2461 if (nfsd4_has_session(cstate
))
2463 if (seqid
== so
->so_seqid
- 1)
2464 return nfserr_replay_me
;
2465 if (seqid
== so
->so_seqid
)
2467 return nfserr_bad_seqid
;
2471 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2472 struct nfsd4_open
*open
)
2474 clientid_t
*clientid
= &open
->op_clientid
;
2475 struct nfs4_client
*clp
= NULL
;
2476 unsigned int strhashval
;
2477 struct nfs4_stateowner
*sop
= NULL
;
2480 if (!check_name(open
->op_owner
))
2481 return nfserr_inval
;
2483 if (STALE_CLIENTID(&open
->op_clientid
))
2484 return nfserr_stale_clientid
;
2486 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2487 sop
= find_openstateowner_str(strhashval
, open
);
2488 open
->op_stateowner
= sop
;
2490 /* Make sure the client's lease hasn't expired. */
2491 clp
= find_confirmed_client(clientid
);
2493 return nfserr_expired
;
2496 if (!sop
->so_confirmed
) {
2497 /* Replace unconfirmed owners without checking for replay. */
2498 clp
= sop
->so_client
;
2499 release_openowner(sop
);
2500 open
->op_stateowner
= NULL
;
2503 status
= nfsd4_check_seqid(cstate
, sop
, open
->op_seqid
);
2507 if (open
->op_stateowner
== NULL
) {
2508 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2510 return nfserr_jukebox
;
2511 open
->op_stateowner
= sop
;
2513 list_del_init(&sop
->so_close_lru
);
2514 renew_client(sop
->so_client
);
2518 static inline __be32
2519 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2521 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2522 return nfserr_openmode
;
2527 static struct nfs4_delegation
*
2528 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2530 struct nfs4_delegation
*dp
;
2532 spin_lock(&recall_lock
);
2533 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2534 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
) {
2535 spin_unlock(&recall_lock
);
2538 spin_unlock(&recall_lock
);
2542 static int share_access_to_flags(u32 share_access
)
2544 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2546 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2550 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2551 struct nfs4_delegation
**dp
)
2554 __be32 status
= nfserr_bad_stateid
;
2556 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2559 flags
= share_access_to_flags(open
->op_share_access
);
2560 status
= nfs4_check_delegmode(*dp
, flags
);
2564 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2568 open
->op_stateowner
->so_confirmed
= 1;
2573 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2575 struct nfs4_stateid
*local
;
2576 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2578 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2579 /* ignore lock owners */
2580 if (local
->st_stateowner
->so_is_open_owner
== 0)
2582 /* remember if we have seen this open owner */
2583 if (local
->st_stateowner
== sop
)
2585 /* check for conflicting share reservations */
2586 if (!test_share(local
, open
))
2587 return nfserr_share_denied
;
2592 static inline struct nfs4_stateid
*
2593 nfs4_alloc_stateid(void)
2595 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2598 static inline int nfs4_access_to_access(u32 nfs4_access
)
2602 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2603 flags
|= NFSD_MAY_READ
;
2604 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2605 flags
|= NFSD_MAY_WRITE
;
2609 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2610 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2613 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2614 int access
= nfs4_access_to_access(open
->op_share_access
);
2616 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2617 * allowing it to break the lease and return EAGAIN leaves the
2618 * client unable to make progress in returning the delegation */
2619 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2620 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2622 if (!fp
->fi_fds
[oflag
]) {
2623 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2624 &fp
->fi_fds
[oflag
]);
2628 nfs4_file_get_access(fp
, oflag
);
2634 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2635 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2636 struct nfsd4_open
*open
)
2638 struct nfs4_stateid
*stp
;
2641 stp
= nfs4_alloc_stateid();
2643 return nfserr_jukebox
;
2645 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2647 kmem_cache_free(stateid_slab
, stp
);
2654 static inline __be32
2655 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2656 struct nfsd4_open
*open
)
2658 struct iattr iattr
= {
2659 .ia_valid
= ATTR_SIZE
,
2662 if (!open
->op_truncate
)
2664 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2665 return nfserr_inval
;
2666 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2670 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2672 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2676 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2678 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2682 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2685 int oflag
= nfs4_access_to_omode(op_share_access
);
2686 nfs4_file_put_access(fp
, oflag
);
2690 /* remember the open */
2691 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2692 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2699 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2701 open
->op_stateowner
->so_confirmed
= 1;
2702 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2705 /* Should we give out recallable state?: */
2706 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2708 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2711 * In the sessions case, since we don't have to establish a
2712 * separate connection for callbacks, we assume it's OK
2713 * until we hear otherwise:
2715 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2718 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2720 struct file_lock
*fl
;
2722 fl
= locks_alloc_lock();
2725 locks_init_lock(fl
);
2726 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2727 fl
->fl_flags
= FL_LEASE
;
2728 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2729 fl
->fl_end
= OFFSET_MAX
;
2730 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2731 fl
->fl_pid
= current
->tgid
;
2735 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2737 struct nfs4_file
*fp
= dp
->dl_file
;
2738 struct file_lock
*fl
;
2741 fl
= nfs4_alloc_init_lease(dp
, flag
);
2744 fl
->fl_file
= find_readable_file(fp
);
2745 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2746 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2748 list_del_init(&dp
->dl_perclnt
);
2749 locks_free_lock(fl
);
2753 fp
->fi_deleg_file
= fl
->fl_file
;
2754 get_file(fp
->fi_deleg_file
);
2755 atomic_set(&fp
->fi_delegees
, 1);
2756 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2760 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2762 struct nfs4_file
*fp
= dp
->dl_file
;
2765 return nfs4_setlease(dp
, flag
);
2766 spin_lock(&recall_lock
);
2767 if (fp
->fi_had_conflict
) {
2768 spin_unlock(&recall_lock
);
2771 atomic_inc(&fp
->fi_delegees
);
2772 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2773 spin_unlock(&recall_lock
);
2774 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2779 * Attempt to hand out a delegation.
2782 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2784 struct nfs4_delegation
*dp
;
2785 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2787 int status
, flag
= 0;
2789 cb_up
= nfsd4_cb_channel_good(sop
->so_client
);
2790 flag
= NFS4_OPEN_DELEGATE_NONE
;
2791 open
->op_recall
= 0;
2792 switch (open
->op_claim_type
) {
2793 case NFS4_OPEN_CLAIM_PREVIOUS
:
2795 open
->op_recall
= 1;
2796 flag
= open
->op_delegate_type
;
2797 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2800 case NFS4_OPEN_CLAIM_NULL
:
2801 /* Let's not give out any delegations till everyone's
2802 * had the chance to reclaim theirs.... */
2803 if (locks_in_grace())
2805 if (!cb_up
|| !sop
->so_confirmed
)
2807 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2808 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2810 flag
= NFS4_OPEN_DELEGATE_READ
;
2816 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2819 status
= nfs4_set_delegation(dp
, flag
);
2823 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2825 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2826 STATEID_VAL(&dp
->dl_stateid
));
2828 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2829 && flag
== NFS4_OPEN_DELEGATE_NONE
2830 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2831 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2832 open
->op_delegate_type
= flag
;
2835 nfs4_put_delegation(dp
);
2837 flag
= NFS4_OPEN_DELEGATE_NONE
;
2842 * called with nfs4_lock_state() held.
2845 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2847 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2848 struct nfs4_file
*fp
= NULL
;
2849 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2850 struct nfs4_stateid
*stp
= NULL
;
2851 struct nfs4_delegation
*dp
= NULL
;
2854 status
= nfserr_inval
;
2855 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2856 || !deny_valid(open
->op_share_deny
))
2859 * Lookup file; if found, lookup stateid and check open request,
2860 * and check for delegations in the process of being recalled.
2861 * If not found, create the nfs4_file struct
2863 fp
= find_file(ino
);
2865 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2867 status
= nfs4_check_deleg(fp
, open
, &dp
);
2871 status
= nfserr_bad_stateid
;
2872 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2874 status
= nfserr_jukebox
;
2875 fp
= alloc_init_file(ino
);
2881 * OPEN the file, or upgrade an existing OPEN.
2882 * If truncate fails, the OPEN fails.
2885 /* Stateid was found, this is an OPEN upgrade */
2886 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2890 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2893 init_stateid(stp
, fp
, open
);
2894 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2896 release_open_stateid(stp
);
2900 update_stateid(&stp
->st_stateid
);
2901 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2903 if (nfsd4_has_session(&resp
->cstate
))
2904 open
->op_stateowner
->so_confirmed
= 1;
2907 * Attempt to hand out a delegation. No error return, because the
2908 * OPEN succeeds even if we fail.
2910 nfs4_open_delegation(current_fh
, open
, stp
);
2914 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2915 STATEID_VAL(&stp
->st_stateid
));
2919 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2920 nfs4_set_claim_prev(open
);
2922 * To finish the open response, we just need to set the rflags.
2924 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2925 if (!open
->op_stateowner
->so_confirmed
&&
2926 !nfsd4_has_session(&resp
->cstate
))
2927 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2933 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2936 struct nfs4_client
*clp
;
2940 dprintk("process_renew(%08x/%08x): starting\n",
2941 clid
->cl_boot
, clid
->cl_id
);
2942 status
= nfserr_stale_clientid
;
2943 if (STALE_CLIENTID(clid
))
2945 clp
= find_confirmed_client(clid
);
2946 status
= nfserr_expired
;
2948 /* We assume the client took too long to RENEW. */
2949 dprintk("nfsd4_renew: clientid not found!\n");
2953 status
= nfserr_cb_path_down
;
2954 if (!list_empty(&clp
->cl_delegations
)
2955 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2959 nfs4_unlock_state();
2963 static struct lock_manager nfsd4_manager
= {
2967 nfsd4_end_grace(void)
2969 dprintk("NFSD: end of grace period\n");
2970 nfsd4_recdir_purge_old();
2971 locks_end_grace(&nfsd4_manager
);
2973 * Now that every NFSv4 client has had the chance to recover and
2974 * to see the (possibly new, possibly shorter) lease time, we
2975 * can safely set the next grace time to the current lease time:
2977 nfsd4_grace
= nfsd4_lease
;
2981 nfs4_laundromat(void)
2983 struct nfs4_client
*clp
;
2984 struct nfs4_stateowner
*sop
;
2985 struct nfs4_delegation
*dp
;
2986 struct list_head
*pos
, *next
, reaplist
;
2987 time_t cutoff
= get_seconds() - nfsd4_lease
;
2988 time_t t
, clientid_val
= nfsd4_lease
;
2989 time_t u
, test_val
= nfsd4_lease
;
2993 dprintk("NFSD: laundromat service - starting\n");
2994 if (locks_in_grace())
2996 INIT_LIST_HEAD(&reaplist
);
2997 spin_lock(&client_lock
);
2998 list_for_each_safe(pos
, next
, &client_lru
) {
2999 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3000 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3001 t
= clp
->cl_time
- cutoff
;
3002 if (clientid_val
> t
)
3006 if (atomic_read(&clp
->cl_refcount
)) {
3007 dprintk("NFSD: client in use (clientid %08x)\n",
3008 clp
->cl_clientid
.cl_id
);
3011 unhash_client_locked(clp
);
3012 list_add(&clp
->cl_lru
, &reaplist
);
3014 spin_unlock(&client_lock
);
3015 list_for_each_safe(pos
, next
, &reaplist
) {
3016 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3017 dprintk("NFSD: purging unused client (clientid %08x)\n",
3018 clp
->cl_clientid
.cl_id
);
3019 nfsd4_remove_clid_dir(clp
);
3022 spin_lock(&recall_lock
);
3023 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3024 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3025 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3026 u
= dp
->dl_time
- cutoff
;
3031 list_move(&dp
->dl_recall_lru
, &reaplist
);
3033 spin_unlock(&recall_lock
);
3034 list_for_each_safe(pos
, next
, &reaplist
) {
3035 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3036 list_del_init(&dp
->dl_recall_lru
);
3037 unhash_delegation(dp
);
3039 test_val
= nfsd4_lease
;
3040 list_for_each_safe(pos
, next
, &close_lru
) {
3041 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3042 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
3043 u
= sop
->so_time
- cutoff
;
3048 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
3050 release_openowner(sop
);
3052 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3053 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3054 nfs4_unlock_state();
3055 return clientid_val
;
3058 static struct workqueue_struct
*laundry_wq
;
3059 static void laundromat_main(struct work_struct
*);
3060 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3063 laundromat_main(struct work_struct
*not_used
)
3067 t
= nfs4_laundromat();
3068 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3069 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3072 static struct nfs4_stateowner
*
3073 search_close_lru(u32 st_id
, int flags
)
3075 struct nfs4_stateowner
*local
= NULL
;
3077 if (flags
& CLOSE_STATE
) {
3078 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
3079 if (local
->so_id
== st_id
)
3087 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
3089 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
3093 STALE_STATEID(stateid_t
*stateid
)
3095 if (stateid
->si_boot
== boot_time
)
3097 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3098 STATEID_VAL(stateid
));
3103 access_permit_read(unsigned long access_bmap
)
3105 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3106 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3107 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3111 access_permit_write(unsigned long access_bmap
)
3113 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3114 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3118 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
3120 __be32 status
= nfserr_openmode
;
3122 /* For lock stateid's, we test the parent open, not the lock: */
3123 if (stp
->st_openstp
)
3124 stp
= stp
->st_openstp
;
3125 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3127 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3134 static inline __be32
3135 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3137 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3139 else if (locks_in_grace()) {
3140 /* Answer in remaining cases depends on existence of
3141 * conflicting state; so we must wait out the grace period. */
3142 return nfserr_grace
;
3143 } else if (flags
& WR_STATE
)
3144 return nfs4_share_conflict(current_fh
,
3145 NFS4_SHARE_DENY_WRITE
);
3146 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3147 return nfs4_share_conflict(current_fh
,
3148 NFS4_SHARE_DENY_READ
);
3152 * Allow READ/WRITE during grace period on recovered state only for files
3153 * that are not able to provide mandatory locking.
3156 grace_disallows_io(struct inode
*inode
)
3158 return locks_in_grace() && mandatory_lock(inode
);
3161 /* Returns true iff a is later than b: */
3162 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3164 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3167 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3170 * When sessions are used the stateid generation number is ignored
3173 if (has_session
&& in
->si_generation
== 0)
3176 if (in
->si_generation
== ref
->si_generation
)
3179 /* If the client sends us a stateid from the future, it's buggy: */
3180 if (stateid_generation_after(in
, ref
))
3181 return nfserr_bad_stateid
;
3183 * However, we could see a stateid from the past, even from a
3184 * non-buggy client. For example, if the client sends a lock
3185 * while some IO is outstanding, the lock may bump si_generation
3186 * while the IO is still in flight. The client could avoid that
3187 * situation by waiting for responses on all the IO requests,
3188 * but better performance may result in retrying IO that
3189 * receives an old_stateid error if requests are rarely
3190 * reordered in flight:
3192 return nfserr_old_stateid
;
3195 static int is_delegation_stateid(stateid_t
*stateid
)
3197 return stateid
->si_fileid
== 0;
3200 __be32
nfs4_validate_stateid(stateid_t
*stateid
, bool has_session
)
3202 struct nfs4_stateid
*stp
= NULL
;
3203 __be32 status
= nfserr_stale_stateid
;
3205 if (STALE_STATEID(stateid
))
3208 status
= nfserr_expired
;
3209 stp
= find_stateid(stateid
, 0);
3212 status
= nfserr_bad_stateid
;
3214 if (!stp
->st_stateowner
->so_confirmed
)
3217 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, has_session
);
3227 * Checks for stateid operations
3230 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3231 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3233 struct nfs4_stateid
*stp
= NULL
;
3234 struct nfs4_delegation
*dp
= NULL
;
3235 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3236 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3242 if (grace_disallows_io(ino
))
3243 return nfserr_grace
;
3245 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3246 return check_special_stateids(current_fh
, stateid
, flags
);
3248 status
= nfserr_stale_stateid
;
3249 if (STALE_STATEID(stateid
))
3253 * We assume that any stateid that has the current boot time,
3254 * but that we can't find, is expired:
3256 status
= nfserr_expired
;
3257 if (is_delegation_stateid(stateid
)) {
3258 dp
= find_delegation_stateid(ino
, stateid
);
3261 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3264 status
= nfs4_check_delegmode(dp
, flags
);
3267 renew_client(dp
->dl_client
);
3269 *filpp
= dp
->dl_file
->fi_deleg_file
;
3272 } else { /* open or lock stateid */
3273 stp
= find_stateid(stateid
, flags
);
3276 status
= nfserr_bad_stateid
;
3277 if (nfs4_check_fh(current_fh
, stp
))
3279 if (!stp
->st_stateowner
->so_confirmed
)
3281 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3282 nfsd4_has_session(cstate
));
3285 status
= nfs4_check_openmode(stp
, flags
);
3288 renew_client(stp
->st_stateowner
->so_client
);
3290 if (flags
& RD_STATE
)
3291 *filpp
= find_readable_file(stp
->st_file
);
3293 *filpp
= find_writeable_file(stp
->st_file
);
3302 nfsd4_free_delegation_stateid(stateid_t
*stateid
)
3304 struct nfs4_delegation
*dp
= search_for_delegation(stateid
);
3306 return nfserr_locks_held
;
3307 return nfserr_bad_stateid
;
3311 nfsd4_free_lock_stateid(struct nfs4_stateid
*stp
)
3313 if (check_for_locks(stp
->st_file
, stp
->st_stateowner
))
3314 return nfserr_locks_held
;
3315 release_lock_stateid(stp
);
3320 * Test if the stateid is valid
3323 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3324 struct nfsd4_test_stateid
*test_stateid
)
3326 test_stateid
->ts_has_session
= nfsd4_has_session(cstate
);
3334 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3335 struct nfsd4_free_stateid
*free_stateid
)
3337 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3338 struct nfs4_stateid
*stp
;
3342 if (is_delegation_stateid(stateid
)) {
3343 ret
= nfsd4_free_delegation_stateid(stateid
);
3347 stp
= find_stateid(stateid
, 0);
3349 ret
= nfserr_bad_stateid
;
3352 ret
= check_stateid_generation(stateid
, &stp
->st_stateid
, 1);
3356 if (stp
->st_type
== NFS4_OPEN_STID
) {
3357 ret
= nfserr_locks_held
;
3360 ret
= nfsd4_free_lock_stateid(stp
);
3365 nfs4_unlock_state();
3372 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3373 RD_STATE
: WR_STATE
;
3377 * Checks for sequence id mutating operations.
3380 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3381 stateid_t
*stateid
, int flags
,
3382 struct nfs4_stateid
**stpp
)
3384 struct nfs4_stateid
*stp
;
3385 struct nfs4_stateowner
*sop
;
3386 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3389 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3390 seqid
, STATEID_VAL(stateid
));
3394 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
3395 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
3396 return nfserr_bad_stateid
;
3399 if (STALE_STATEID(stateid
))
3400 return nfserr_stale_stateid
;
3403 * We return BAD_STATEID if filehandle doesn't match stateid,
3404 * the confirmed flag is incorrecly set, or the generation
3405 * number is incorrect.
3407 stp
= find_stateid(stateid
, flags
);
3410 * Also, we should make sure this isn't just the result of
3413 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
3414 /* It's not stale; let's assume it's expired: */
3416 return nfserr_expired
;
3417 cstate
->replay_owner
= sop
;
3418 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3421 return nfserr_bad_seqid
;
3425 sop
= stp
->st_stateowner
;
3426 cstate
->replay_owner
= sop
;
3428 if (nfs4_check_fh(current_fh
, stp
)) {
3429 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3430 return nfserr_bad_stateid
;
3433 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3437 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
3438 dprintk("NFSD: preprocess_seqid_op: stateowner not"
3439 " confirmed yet!\n");
3440 return nfserr_bad_stateid
;
3442 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, nfsd4_has_session(cstate
));
3445 renew_client(sop
->so_client
);
3450 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3451 struct nfsd4_open_confirm
*oc
)
3454 struct nfs4_stateowner
*sop
;
3455 struct nfs4_stateid
*stp
;
3457 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3458 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3459 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3461 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3467 status
= nfs4_preprocess_seqid_op(cstate
,
3468 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3469 CONFIRM
| OPEN_STATE
, &stp
);
3472 sop
= stp
->st_stateowner
;
3473 status
= nfserr_bad_stateid
;
3474 if (sop
->so_confirmed
)
3476 sop
->so_confirmed
= 1;
3477 update_stateid(&stp
->st_stateid
);
3478 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3479 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3480 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3482 nfsd4_create_clid_dir(sop
->so_client
);
3485 if (!cstate
->replay_owner
)
3486 nfs4_unlock_state();
3490 static inline void nfs4_file_downgrade(struct nfs4_stateid
*stp
, unsigned int to_access
)
3494 for (i
= 1; i
< 4; i
++) {
3495 if (test_bit(i
, &stp
->st_access_bmap
) && !(i
& to_access
)) {
3496 nfs4_file_put_access(stp
->st_file
, i
);
3497 __clear_bit(i
, &stp
->st_access_bmap
);
3503 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3506 for (i
= 0; i
< 4; i
++) {
3507 if ((i
& deny
) != i
)
3508 __clear_bit(i
, bmap
);
3513 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3514 struct nfsd4_compound_state
*cstate
,
3515 struct nfsd4_open_downgrade
*od
)
3518 struct nfs4_stateid
*stp
;
3520 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3521 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3522 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3524 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3525 || !deny_valid(od
->od_share_deny
))
3526 return nfserr_inval
;
3529 status
= nfs4_preprocess_seqid_op(cstate
, od
->od_seqid
,
3530 &od
->od_stateid
, OPEN_STATE
, &stp
);
3534 status
= nfserr_inval
;
3535 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3536 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3537 stp
->st_access_bmap
, od
->od_share_access
);
3540 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3541 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3542 stp
->st_deny_bmap
, od
->od_share_deny
);
3545 nfs4_file_downgrade(stp
, od
->od_share_access
);
3547 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3549 update_stateid(&stp
->st_stateid
);
3550 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3553 if (!cstate
->replay_owner
)
3554 nfs4_unlock_state();
3559 * nfs4_unlock_state() called after encode
3562 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3563 struct nfsd4_close
*close
)
3566 struct nfs4_stateid
*stp
;
3567 struct nfs4_stateowner
*so
;
3569 dprintk("NFSD: nfsd4_close on file %.*s\n",
3570 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3571 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3574 /* check close_lru for replay */
3575 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3577 OPEN_STATE
| CLOSE_STATE
, &stp
);
3580 so
= stp
->st_stateowner
;
3582 update_stateid(&stp
->st_stateid
);
3583 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3585 /* release_stateid() calls nfsd_close() if needed */
3586 release_open_stateid(stp
);
3588 /* place unused nfs4_stateowners on so_close_lru list to be
3589 * released by the laundromat service after the lease period
3590 * to enable us to handle CLOSE replay
3592 if (list_empty(&so
->so_stateids
))
3593 move_to_close_lru(so
);
3595 if (!cstate
->replay_owner
)
3596 nfs4_unlock_state();
3601 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3602 struct nfsd4_delegreturn
*dr
)
3604 struct nfs4_delegation
*dp
;
3605 stateid_t
*stateid
= &dr
->dr_stateid
;
3606 struct inode
*inode
;
3609 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3611 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3614 status
= nfserr_bad_stateid
;
3615 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3617 status
= nfserr_stale_stateid
;
3618 if (STALE_STATEID(stateid
))
3620 status
= nfserr_bad_stateid
;
3621 if (!is_delegation_stateid(stateid
))
3623 status
= nfserr_expired
;
3624 dp
= find_delegation_stateid(inode
, stateid
);
3627 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3630 renew_client(dp
->dl_client
);
3632 unhash_delegation(dp
);
3634 nfs4_unlock_state();
3641 * Lock owner state (byte-range locks)
3643 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3644 #define LOCK_HASH_BITS 8
3645 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3646 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3649 end_offset(u64 start
, u64 len
)
3654 return end
>= start
? end
: NFS4_MAX_UINT64
;
3657 /* last octet in a range */
3659 last_byte_offset(u64 start
, u64 len
)
3665 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3668 static unsigned int lockownerid_hashval(u32 id
)
3670 return id
& LOCK_HASH_MASK
;
3673 static inline unsigned int
3674 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3675 struct xdr_netobj
*ownername
)
3677 return (file_hashval(inode
) + cl_id
3678 + opaque_hashval(ownername
->data
, ownername
->len
))
3682 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3683 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3686 same_stateid(stateid_t
*id_one
, stateid_t
*id_two
)
3688 if (id_one
->si_stateownerid
!= id_two
->si_stateownerid
)
3690 return id_one
->si_fileid
== id_two
->si_fileid
;
3693 static struct nfs4_stateid
*find_stateid(stateid_t
*t
, int flags
)
3695 struct nfs4_stateid
*s
;
3696 unsigned int hashval
;
3698 hashval
= stateid_hashval(t
->si_stateownerid
, t
->si_fileid
);
3699 list_for_each_entry(s
, &stateid_hashtbl
[hashval
], st_hash
) {
3700 if (!same_stateid(&s
->st_stateid
, t
))
3702 if (flags
& LOCK_STATE
&& s
->st_type
!= NFS4_LOCK_STID
)
3704 if (flags
& OPEN_STATE
&& s
->st_type
!= NFS4_OPEN_STID
)
3711 static struct nfs4_delegation
*
3712 search_for_delegation(stateid_t
*stid
)
3714 struct nfs4_file
*fp
;
3715 struct nfs4_delegation
*dp
;
3716 struct list_head
*pos
;
3719 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3720 list_for_each_entry(fp
, &file_hashtbl
[i
], fi_hash
) {
3721 list_for_each(pos
, &fp
->fi_delegations
) {
3722 dp
= list_entry(pos
, struct nfs4_delegation
, dl_perfile
);
3723 if (same_stateid(&dp
->dl_stateid
, stid
))
3731 static struct nfs4_delegation
*
3732 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3734 struct nfs4_file
*fp
;
3735 struct nfs4_delegation
*dl
;
3737 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3740 fp
= find_file(ino
);
3743 dl
= find_delegation_file(fp
, stid
);
3749 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3750 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3751 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3752 * locking, this prevents us from being completely protocol-compliant. The
3753 * real solution to this problem is to start using unsigned file offsets in
3754 * the VFS, but this is a very deep change!
3757 nfs4_transform_lock_offset(struct file_lock
*lock
)
3759 if (lock
->fl_start
< 0)
3760 lock
->fl_start
= OFFSET_MAX
;
3761 if (lock
->fl_end
< 0)
3762 lock
->fl_end
= OFFSET_MAX
;
3765 /* Hack!: For now, we're defining this just so we can use a pointer to it
3766 * as a unique cookie to identify our (NFSv4's) posix locks. */
3767 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3771 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3773 struct nfs4_stateowner
*sop
;
3775 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3776 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3777 deny
->ld_owner
.data
= kmemdup(sop
->so_owner
.data
,
3778 sop
->so_owner
.len
, GFP_KERNEL
);
3779 if (!deny
->ld_owner
.data
)
3780 /* We just don't care that much */
3782 deny
->ld_owner
.len
= sop
->so_owner
.len
;
3783 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3786 deny
->ld_owner
.len
= 0;
3787 deny
->ld_owner
.data
= NULL
;
3788 deny
->ld_clientid
.cl_boot
= 0;
3789 deny
->ld_clientid
.cl_id
= 0;
3791 deny
->ld_start
= fl
->fl_start
;
3792 deny
->ld_length
= NFS4_MAX_UINT64
;
3793 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3794 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3795 deny
->ld_type
= NFS4_READ_LT
;
3796 if (fl
->fl_type
!= F_RDLCK
)
3797 deny
->ld_type
= NFS4_WRITE_LT
;
3800 static struct nfs4_stateowner
*
3801 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3802 struct xdr_netobj
*owner
)
3804 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3805 struct nfs4_stateowner
*op
;
3807 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3808 if (same_owner_str(op
, owner
, clid
))
3814 static void hash_lockowner(struct nfs4_stateowner
*sop
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
)
3816 unsigned int idhashval
;
3818 idhashval
= lockownerid_hashval(sop
->so_id
);
3819 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3820 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3821 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3825 * Alloc a lock owner structure.
3826 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3829 * strhashval = lock_ownerstr_hashval
3832 static struct nfs4_stateowner
*
3833 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3834 struct nfs4_stateowner
*sop
;
3836 sop
= alloc_stateowner(&lock
->lk_new_owner
, clp
);
3839 INIT_LIST_HEAD(&sop
->so_stateids
);
3840 sop
->so_is_open_owner
= 0;
3841 /* It is the openowner seqid that will be incremented in encode in the
3842 * case of new lockowners; so increment the lock seqid manually: */
3843 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3844 sop
->so_confirmed
= 1;
3845 hash_lockowner(sop
, strhashval
, clp
, open_stp
);
3849 static struct nfs4_stateid
*
3850 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3852 struct nfs4_stateid
*stp
;
3853 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3855 stp
= nfs4_alloc_stateid();
3858 INIT_LIST_HEAD(&stp
->st_hash
);
3859 INIT_LIST_HEAD(&stp
->st_perfile
);
3860 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3861 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3862 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
3863 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3864 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3865 stp
->st_stateowner
= sop
;
3866 stp
->st_type
= NFS4_LOCK_STID
;
3869 stp
->st_stateid
.si_boot
= boot_time
;
3870 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3871 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3872 /* note will be incremented before first return to client: */
3873 stp
->st_stateid
.si_generation
= 0;
3874 stp
->st_access_bmap
= 0;
3875 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3876 stp
->st_openstp
= open_stp
;
3883 check_lock_length(u64 offset
, u64 length
)
3885 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3886 LOFF_OVERFLOW(offset
, length
)));
3889 static void get_lock_access(struct nfs4_stateid
*lock_stp
, u32 access
)
3891 struct nfs4_file
*fp
= lock_stp
->st_file
;
3892 int oflag
= nfs4_access_to_omode(access
);
3894 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3896 nfs4_file_get_access(fp
, oflag
);
3897 __set_bit(access
, &lock_stp
->st_access_bmap
);
3904 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3905 struct nfsd4_lock
*lock
)
3907 struct nfs4_stateowner
*open_sop
= NULL
;
3908 struct nfs4_stateowner
*lock_sop
= NULL
;
3909 struct nfs4_stateid
*lock_stp
;
3910 struct nfs4_file
*fp
;
3911 struct file
*filp
= NULL
;
3912 struct file_lock file_lock
;
3913 struct file_lock conflock
;
3915 unsigned int strhashval
;
3919 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3920 (long long) lock
->lk_offset
,
3921 (long long) lock
->lk_length
);
3923 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3924 return nfserr_inval
;
3926 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3927 S_IFREG
, NFSD_MAY_LOCK
))) {
3928 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3934 if (lock
->lk_is_new
) {
3936 * Client indicates that this is a new lockowner.
3937 * Use open owner and open stateid to create lock owner and
3940 struct nfs4_stateid
*open_stp
= NULL
;
3942 status
= nfserr_stale_clientid
;
3943 if (!nfsd4_has_session(cstate
) &&
3944 STALE_CLIENTID(&lock
->lk_new_clientid
))
3947 /* validate and update open stateid and open seqid */
3948 status
= nfs4_preprocess_seqid_op(cstate
,
3949 lock
->lk_new_open_seqid
,
3950 &lock
->lk_new_open_stateid
,
3951 OPEN_STATE
, &open_stp
);
3954 status
= nfserr_bad_stateid
;
3955 open_sop
= open_stp
->st_stateowner
;
3956 if (!nfsd4_has_session(cstate
) &&
3957 !same_clid(&open_sop
->so_client
->cl_clientid
,
3958 &lock
->v
.new.clientid
))
3960 /* create lockowner and lock stateid */
3961 fp
= open_stp
->st_file
;
3962 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3963 open_sop
->so_client
->cl_clientid
.cl_id
,
3964 &lock
->v
.new.owner
);
3965 /* XXX: Do we need to check for duplicate stateowners on
3966 * the same file, or should they just be allowed (and
3967 * create new stateids)? */
3968 status
= nfserr_jukebox
;
3969 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3970 open_sop
->so_client
, open_stp
, lock
);
3971 if (lock_sop
== NULL
)
3973 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3974 if (lock_stp
== NULL
)
3977 /* lock (lock owner + lock stateid) already exists */
3978 status
= nfs4_preprocess_seqid_op(cstate
,
3979 lock
->lk_old_lock_seqid
,
3980 &lock
->lk_old_lock_stateid
,
3981 LOCK_STATE
, &lock_stp
);
3984 lock_sop
= lock_stp
->st_stateowner
;
3985 fp
= lock_stp
->st_file
;
3987 /* lock_sop and lock_stp have been created or found */
3989 lkflg
= setlkflg(lock
->lk_type
);
3990 status
= nfs4_check_openmode(lock_stp
, lkflg
);
3994 status
= nfserr_grace
;
3995 if (locks_in_grace() && !lock
->lk_reclaim
)
3997 status
= nfserr_no_grace
;
3998 if (!locks_in_grace() && lock
->lk_reclaim
)
4001 locks_init_lock(&file_lock
);
4002 switch (lock
->lk_type
) {
4005 filp
= find_readable_file(lock_stp
->st_file
);
4007 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4008 file_lock
.fl_type
= F_RDLCK
;
4011 case NFS4_WRITEW_LT
:
4012 filp
= find_writeable_file(lock_stp
->st_file
);
4014 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4015 file_lock
.fl_type
= F_WRLCK
;
4018 status
= nfserr_inval
;
4022 status
= nfserr_openmode
;
4025 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4026 file_lock
.fl_pid
= current
->tgid
;
4027 file_lock
.fl_file
= filp
;
4028 file_lock
.fl_flags
= FL_POSIX
;
4029 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4031 file_lock
.fl_start
= lock
->lk_offset
;
4032 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4033 nfs4_transform_lock_offset(&file_lock
);
4036 * Try to lock the file in the VFS.
4037 * Note: locks.c uses the BKL to protect the inode's lock list.
4040 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4042 case 0: /* success! */
4043 update_stateid(&lock_stp
->st_stateid
);
4044 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
4048 case (EAGAIN
): /* conflock holds conflicting lock */
4049 status
= nfserr_denied
;
4050 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4051 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4054 status
= nfserr_deadlock
;
4057 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4058 status
= nfserrno(err
);
4062 if (status
&& lock
->lk_is_new
&& lock_sop
)
4063 release_lockowner(lock_sop
);
4064 if (!cstate
->replay_owner
)
4065 nfs4_unlock_state();
4070 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4071 * so we do a temporary open here just to get an open file to pass to
4072 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4075 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4080 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4083 err
= vfs_test_lock(file
, lock
);
4092 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4093 struct nfsd4_lockt
*lockt
)
4095 struct inode
*inode
;
4096 struct file_lock file_lock
;
4097 struct nfs4_stateowner
*so
;
4101 if (locks_in_grace())
4102 return nfserr_grace
;
4104 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4105 return nfserr_inval
;
4109 status
= nfserr_stale_clientid
;
4110 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4113 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4116 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4117 locks_init_lock(&file_lock
);
4118 switch (lockt
->lt_type
) {
4121 file_lock
.fl_type
= F_RDLCK
;
4124 case NFS4_WRITEW_LT
:
4125 file_lock
.fl_type
= F_WRLCK
;
4128 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4129 status
= nfserr_inval
;
4133 so
= find_lockstateowner_str(inode
,
4134 &lockt
->lt_clientid
, &lockt
->lt_owner
);
4136 file_lock
.fl_owner
= (fl_owner_t
)so
;
4137 file_lock
.fl_pid
= current
->tgid
;
4138 file_lock
.fl_flags
= FL_POSIX
;
4140 file_lock
.fl_start
= lockt
->lt_offset
;
4141 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4143 nfs4_transform_lock_offset(&file_lock
);
4146 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4148 status
= nfserrno(error
);
4151 if (file_lock
.fl_type
!= F_UNLCK
) {
4152 status
= nfserr_denied
;
4153 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4156 nfs4_unlock_state();
4161 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4162 struct nfsd4_locku
*locku
)
4164 struct nfs4_stateid
*stp
;
4165 struct file
*filp
= NULL
;
4166 struct file_lock file_lock
;
4170 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4171 (long long) locku
->lu_offset
,
4172 (long long) locku
->lu_length
);
4174 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4175 return nfserr_inval
;
4179 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4180 &locku
->lu_stateid
, LOCK_STATE
, &stp
);
4183 filp
= find_any_file(stp
->st_file
);
4185 status
= nfserr_lock_range
;
4189 locks_init_lock(&file_lock
);
4190 file_lock
.fl_type
= F_UNLCK
;
4191 file_lock
.fl_owner
= (fl_owner_t
) stp
->st_stateowner
;
4192 file_lock
.fl_pid
= current
->tgid
;
4193 file_lock
.fl_file
= filp
;
4194 file_lock
.fl_flags
= FL_POSIX
;
4195 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4196 file_lock
.fl_start
= locku
->lu_offset
;
4198 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4199 nfs4_transform_lock_offset(&file_lock
);
4202 * Try to unlock the file in the VFS.
4204 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4206 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4210 * OK, unlock succeeded; the only thing left to do is update the stateid.
4212 update_stateid(&stp
->st_stateid
);
4213 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
4216 nfs4_unlock_state();
4220 status
= nfserrno(err
);
4226 * 1: locks held by lockowner
4227 * 0: no locks held by lockowner
4230 check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
)
4232 struct file_lock
**flpp
;
4233 struct inode
*inode
= filp
->fi_inode
;
4237 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4238 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4249 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4250 struct nfsd4_compound_state
*cstate
,
4251 struct nfsd4_release_lockowner
*rlockowner
)
4253 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4254 struct nfs4_stateowner
*sop
;
4255 struct nfs4_stateid
*stp
;
4256 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4257 struct list_head matches
;
4261 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4262 clid
->cl_boot
, clid
->cl_id
);
4264 /* XXX check for lease expiration */
4266 status
= nfserr_stale_clientid
;
4267 if (STALE_CLIENTID(clid
))
4272 status
= nfserr_locks_held
;
4273 /* XXX: we're doing a linear search through all the lockowners.
4274 * Yipes! For now we'll just hope clients aren't really using
4275 * release_lockowner much, but eventually we have to fix these
4276 * data structures. */
4277 INIT_LIST_HEAD(&matches
);
4278 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4279 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4280 if (!same_owner_str(sop
, owner
, clid
))
4282 list_for_each_entry(stp
, &sop
->so_stateids
,
4284 if (check_for_locks(stp
->st_file
, sop
))
4286 /* Note: so_perclient unused for lockowners,
4287 * so it's OK to fool with here. */
4288 list_add(&sop
->so_perclient
, &matches
);
4292 /* Clients probably won't expect us to return with some (but not all)
4293 * of the lockowner state released; so don't release any until all
4294 * have been checked. */
4296 while (!list_empty(&matches
)) {
4297 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
4299 /* unhash_stateowner deletes so_perclient only
4300 * for openowners. */
4301 list_del(&sop
->so_perclient
);
4302 release_lockowner(sop
);
4305 nfs4_unlock_state();
4309 static inline struct nfs4_client_reclaim
*
4312 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4316 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4318 unsigned int strhashval
= clientstr_hashval(name
);
4319 struct nfs4_client
*clp
;
4321 clp
= find_confirmed_client_by_str(name
, strhashval
);
4326 * failure => all reset bets are off, nfserr_no_grace...
4329 nfs4_client_to_reclaim(const char *name
)
4331 unsigned int strhashval
;
4332 struct nfs4_client_reclaim
*crp
= NULL
;
4334 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4335 crp
= alloc_reclaim();
4338 strhashval
= clientstr_hashval(name
);
4339 INIT_LIST_HEAD(&crp
->cr_strhash
);
4340 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4341 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4342 reclaim_str_hashtbl_size
++;
4347 nfs4_release_reclaim(void)
4349 struct nfs4_client_reclaim
*crp
= NULL
;
4352 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4353 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4354 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4355 struct nfs4_client_reclaim
, cr_strhash
);
4356 list_del(&crp
->cr_strhash
);
4358 reclaim_str_hashtbl_size
--;
4361 BUG_ON(reclaim_str_hashtbl_size
);
4365 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4366 static struct nfs4_client_reclaim
*
4367 nfs4_find_reclaim_client(clientid_t
*clid
)
4369 unsigned int strhashval
;
4370 struct nfs4_client
*clp
;
4371 struct nfs4_client_reclaim
*crp
= NULL
;
4374 /* find clientid in conf_id_hashtbl */
4375 clp
= find_confirmed_client(clid
);
4379 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4380 clp
->cl_name
.len
, clp
->cl_name
.data
,
4383 /* find clp->cl_name in reclaim_str_hashtbl */
4384 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4385 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4386 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4394 * Called from OPEN. Look for clientid in reclaim list.
4397 nfs4_check_open_reclaim(clientid_t
*clid
)
4399 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4402 /* initialization to perform at module load time: */
4405 nfs4_state_init(void)
4409 status
= nfsd4_init_slabs();
4412 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4413 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4414 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4415 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4416 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4417 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4419 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4420 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4421 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4422 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4424 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4425 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4426 INIT_LIST_HEAD(&open_ownerid_hashtbl
[i
]);
4428 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++)
4429 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4430 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4431 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4432 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4434 memset(&onestateid
, ~0, sizeof(stateid_t
));
4435 INIT_LIST_HEAD(&close_lru
);
4436 INIT_LIST_HEAD(&client_lru
);
4437 INIT_LIST_HEAD(&del_recall_lru
);
4438 reclaim_str_hashtbl_size
= 0;
4443 nfsd4_load_reboot_recovery_data(void)
4448 nfsd4_init_recdir();
4449 status
= nfsd4_recdir_load();
4450 nfs4_unlock_state();
4452 printk("NFSD: Failure reading reboot recovery data\n");
4456 * Since the lifetime of a delegation isn't limited to that of an open, a
4457 * client may quite reasonably hang on to a delegation as long as it has
4458 * the inode cached. This becomes an obvious problem the first time a
4459 * client's inode cache approaches the size of the server's total memory.
4461 * For now we avoid this problem by imposing a hard limit on the number
4462 * of delegations, which varies according to the server's memory size.
4465 set_max_delegations(void)
4468 * Allow at most 4 delegations per megabyte of RAM. Quick
4469 * estimates suggest that in the worst case (where every delegation
4470 * is for a different inode), a delegation could take about 1.5K,
4471 * giving a worst case usage of about 6% of memory.
4473 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4476 /* initialization to perform when the nfsd service is started: */
4479 __nfs4_state_start(void)
4483 boot_time
= get_seconds();
4484 locks_start_grace(&nfsd4_manager
);
4485 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4487 ret
= set_callback_cred();
4490 laundry_wq
= create_singlethread_workqueue("nfsd4");
4491 if (laundry_wq
== NULL
)
4493 ret
= nfsd4_create_callback_queue();
4495 goto out_free_laundry
;
4496 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4497 set_max_delegations();
4500 destroy_workqueue(laundry_wq
);
4505 nfs4_state_start(void)
4507 nfsd4_load_reboot_recovery_data();
4508 return __nfs4_state_start();
4512 __nfs4_state_shutdown(void)
4515 struct nfs4_client
*clp
= NULL
;
4516 struct nfs4_delegation
*dp
= NULL
;
4517 struct list_head
*pos
, *next
, reaplist
;
4519 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4520 while (!list_empty(&conf_id_hashtbl
[i
])) {
4521 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4524 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4525 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4529 INIT_LIST_HEAD(&reaplist
);
4530 spin_lock(&recall_lock
);
4531 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4532 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4533 list_move(&dp
->dl_recall_lru
, &reaplist
);
4535 spin_unlock(&recall_lock
);
4536 list_for_each_safe(pos
, next
, &reaplist
) {
4537 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4538 list_del_init(&dp
->dl_recall_lru
);
4539 unhash_delegation(dp
);
4542 nfsd4_shutdown_recdir();
4546 nfs4_state_shutdown(void)
4548 cancel_delayed_work_sync(&laundromat_work
);
4549 destroy_workqueue(laundry_wq
);
4550 locks_end_grace(&nfsd4_manager
);
4552 nfs4_release_reclaim();
4553 __nfs4_state_shutdown();
4554 nfs4_unlock_state();
4555 nfsd4_destroy_callback_queue();