2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/sunrpc/svcauth_gss.h>
41 #include <linux/sunrpc/clnt.h>
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
48 time_t nfsd4_lease
= 90; /* default lease time */
49 time_t nfsd4_grace
= 90;
50 static time_t boot_time
;
51 static u32 current_ownerid
= 1;
52 static u32 current_fileid
= 1;
53 static u32 current_delegid
= 1;
54 static stateid_t zerostateid
; /* bits all 0 */
55 static stateid_t onestateid
; /* bits all 1 */
56 static u64 current_sessionid
= 1;
58 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
59 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
61 /* forward declarations */
62 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
63 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
64 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
65 static void nfs4_set_recdir(char *recdir
);
69 /* Currently used for almost all code touching nfsv4 state: */
70 static DEFINE_MUTEX(client_mutex
);
73 * Currently used for the del_recall_lru and file hash table. In an
74 * effort to decrease the scope of the client_mutex, this spinlock may
75 * eventually cover more:
77 static DEFINE_SPINLOCK(recall_lock
);
79 static struct kmem_cache
*stateowner_slab
= NULL
;
80 static struct kmem_cache
*file_slab
= NULL
;
81 static struct kmem_cache
*stateid_slab
= NULL
;
82 static struct kmem_cache
*deleg_slab
= NULL
;
87 mutex_lock(&client_mutex
);
91 nfs4_unlock_state(void)
93 mutex_unlock(&client_mutex
);
97 opaque_hashval(const void *ptr
, int nbytes
)
99 unsigned char *cptr
= (unsigned char *) ptr
;
109 static struct list_head del_recall_lru
;
112 put_nfs4_file(struct nfs4_file
*fi
)
114 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
115 list_del(&fi
->fi_hash
);
116 spin_unlock(&recall_lock
);
118 kmem_cache_free(file_slab
, fi
);
123 get_nfs4_file(struct nfs4_file
*fi
)
125 atomic_inc(&fi
->fi_ref
);
128 static int num_delegations
;
129 unsigned int max_delegations
;
132 * Open owner state (share locks)
135 /* hash tables for nfs4_stateowner */
136 #define OWNER_HASH_BITS 8
137 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
138 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
140 #define ownerid_hashval(id) \
141 ((id) & OWNER_HASH_MASK)
142 #define ownerstr_hashval(clientid, ownername) \
143 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
145 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
146 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
148 /* hash table for nfs4_file */
149 #define FILE_HASH_BITS 8
150 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
151 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
152 /* hash table for (open)nfs4_stateid */
153 #define STATEID_HASH_BITS 10
154 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
155 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
157 #define file_hashval(x) \
158 hash_ptr(x, FILE_HASH_BITS)
159 #define stateid_hashval(owner_id, file_id) \
160 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
162 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
163 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
165 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
167 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
168 atomic_inc(&fp
->fi_access
[oflag
]);
171 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
173 if (oflag
== O_RDWR
) {
174 __nfs4_file_get_access(fp
, O_RDONLY
);
175 __nfs4_file_get_access(fp
, O_WRONLY
);
177 __nfs4_file_get_access(fp
, oflag
);
180 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
182 if (fp
->fi_fds
[oflag
]) {
183 fput(fp
->fi_fds
[oflag
]);
184 fp
->fi_fds
[oflag
] = NULL
;
188 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
190 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
191 nfs4_file_put_fd(fp
, O_RDWR
);
192 nfs4_file_put_fd(fp
, oflag
);
196 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
198 if (oflag
== O_RDWR
) {
199 __nfs4_file_put_access(fp
, O_RDONLY
);
200 __nfs4_file_put_access(fp
, O_WRONLY
);
202 __nfs4_file_put_access(fp
, oflag
);
205 static struct nfs4_delegation
*
206 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
208 struct nfs4_delegation
*dp
;
209 struct nfs4_file
*fp
= stp
->st_file
;
211 dprintk("NFSD alloc_init_deleg\n");
213 * Major work on the lease subsystem (for example, to support
214 * calbacks on stat) will be required before we can support
215 * write delegations properly.
217 if (type
!= NFS4_OPEN_DELEGATE_READ
)
219 if (fp
->fi_had_conflict
)
221 if (num_delegations
> max_delegations
)
223 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
227 INIT_LIST_HEAD(&dp
->dl_perfile
);
228 INIT_LIST_HEAD(&dp
->dl_perclnt
);
229 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
233 dp
->dl_vfs_file
= find_readable_file(fp
);
234 get_file(dp
->dl_vfs_file
);
237 dp
->dl_stateid
.si_boot
= boot_time
;
238 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
239 dp
->dl_stateid
.si_fileid
= 0;
240 dp
->dl_stateid
.si_generation
= 0;
241 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
243 atomic_set(&dp
->dl_count
, 1);
244 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
245 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
246 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
251 nfs4_put_delegation(struct nfs4_delegation
*dp
)
253 if (atomic_dec_and_test(&dp
->dl_count
)) {
254 dprintk("NFSD: freeing dp %p\n",dp
);
255 put_nfs4_file(dp
->dl_file
);
256 fput(dp
->dl_vfs_file
);
257 kmem_cache_free(deleg_slab
, dp
);
262 /* Remove the associated file_lock first, then remove the delegation.
263 * lease_modify() is called to remove the FS_LEASE file_lock from
264 * the i_flock list, eventually calling nfsd's lock_manager
265 * fl_release_callback.
268 nfs4_close_delegation(struct nfs4_delegation
*dp
)
270 dprintk("NFSD: close_delegation dp %p\n",dp
);
271 /* XXX: do we even need this check?: */
273 vfs_setlease(dp
->dl_vfs_file
, F_UNLCK
, &dp
->dl_flock
);
276 /* Called under the state lock. */
278 unhash_delegation(struct nfs4_delegation
*dp
)
280 list_del_init(&dp
->dl_perfile
);
281 list_del_init(&dp
->dl_perclnt
);
282 spin_lock(&recall_lock
);
283 list_del_init(&dp
->dl_recall_lru
);
284 spin_unlock(&recall_lock
);
285 nfs4_close_delegation(dp
);
286 nfs4_put_delegation(dp
);
293 /* client_lock protects the client lru list and session hash table */
294 static DEFINE_SPINLOCK(client_lock
);
296 /* Hash tables for nfs4_clientid state */
297 #define CLIENT_HASH_BITS 4
298 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
299 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
301 #define clientid_hashval(id) \
302 ((id) & CLIENT_HASH_MASK)
303 #define clientstr_hashval(name) \
304 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
306 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
307 * used in reboot/reset lease grace period processing
309 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
310 * setclientid_confirmed info.
312 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
315 * client_lru holds client queue ordered by nfs4_client.cl_time
318 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
319 * for last close replay.
321 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
322 static int reclaim_str_hashtbl_size
= 0;
323 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
324 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
325 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
326 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
327 static struct list_head client_lru
;
328 static struct list_head close_lru
;
330 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
332 list_del(&stp
->st_hash
);
333 list_del(&stp
->st_perfile
);
334 list_del(&stp
->st_perstateowner
);
337 static void free_generic_stateid(struct nfs4_stateid
*stp
)
339 put_nfs4_file(stp
->st_file
);
340 kmem_cache_free(stateid_slab
, stp
);
343 static void release_lock_stateid(struct nfs4_stateid
*stp
)
347 unhash_generic_stateid(stp
);
348 file
= find_any_file(stp
->st_file
);
350 locks_remove_posix(file
, (fl_owner_t
)stp
->st_stateowner
);
351 free_generic_stateid(stp
);
354 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
356 struct nfs4_stateid
*stp
;
358 list_del(&sop
->so_idhash
);
359 list_del(&sop
->so_strhash
);
360 list_del(&sop
->so_perstateid
);
361 while (!list_empty(&sop
->so_stateids
)) {
362 stp
= list_first_entry(&sop
->so_stateids
,
363 struct nfs4_stateid
, st_perstateowner
);
364 release_lock_stateid(stp
);
368 static void release_lockowner(struct nfs4_stateowner
*sop
)
370 unhash_lockowner(sop
);
371 nfs4_put_stateowner(sop
);
375 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
377 struct nfs4_stateowner
*lock_sop
;
379 while (!list_empty(&open_stp
->st_lockowners
)) {
380 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
381 struct nfs4_stateowner
, so_perstateid
);
382 /* list_del(&open_stp->st_lockowners); */
383 BUG_ON(lock_sop
->so_is_open_owner
);
384 release_lockowner(lock_sop
);
389 * We store the NONE, READ, WRITE, and BOTH bits separately in the
390 * st_{access,deny}_bmap field of the stateid, in order to track not
391 * only what share bits are currently in force, but also what
392 * combinations of share bits previous opens have used. This allows us
393 * to enforce the recommendation of rfc 3530 14.2.19 that the server
394 * return an error if the client attempt to downgrade to a combination
395 * of share bits not explicable by closing some of its previous opens.
397 * XXX: This enforcement is actually incomplete, since we don't keep
398 * track of access/deny bit combinations; so, e.g., we allow:
400 * OPEN allow read, deny write
401 * OPEN allow both, deny none
402 * DOWNGRADE allow read, deny none
404 * which we should reject.
407 set_access(unsigned int *access
, unsigned long bmap
) {
411 for (i
= 1; i
< 4; i
++) {
412 if (test_bit(i
, &bmap
))
418 set_deny(unsigned int *deny
, unsigned long bmap
) {
422 for (i
= 0; i
< 4; i
++) {
423 if (test_bit(i
, &bmap
))
429 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
430 unsigned int access
, deny
;
432 set_access(&access
, stp
->st_access_bmap
);
433 set_deny(&deny
, stp
->st_deny_bmap
);
434 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
439 static int nfs4_access_to_omode(u32 access
)
441 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
442 case NFS4_SHARE_ACCESS_READ
:
444 case NFS4_SHARE_ACCESS_WRITE
:
446 case NFS4_SHARE_ACCESS_BOTH
:
452 static int nfs4_access_bmap_to_omode(struct nfs4_stateid
*stp
)
456 set_access(&access
, stp
->st_access_bmap
);
457 return nfs4_access_to_omode(access
);
460 static void release_open_stateid(struct nfs4_stateid
*stp
)
462 int oflag
= nfs4_access_bmap_to_omode(stp
);
464 unhash_generic_stateid(stp
);
465 release_stateid_lockowners(stp
);
466 nfs4_file_put_access(stp
->st_file
, oflag
);
467 free_generic_stateid(stp
);
470 static void unhash_openowner(struct nfs4_stateowner
*sop
)
472 struct nfs4_stateid
*stp
;
474 list_del(&sop
->so_idhash
);
475 list_del(&sop
->so_strhash
);
476 list_del(&sop
->so_perclient
);
477 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
478 while (!list_empty(&sop
->so_stateids
)) {
479 stp
= list_first_entry(&sop
->so_stateids
,
480 struct nfs4_stateid
, st_perstateowner
);
481 release_open_stateid(stp
);
485 static void release_openowner(struct nfs4_stateowner
*sop
)
487 unhash_openowner(sop
);
488 list_del(&sop
->so_close_lru
);
489 nfs4_put_stateowner(sop
);
492 #define SESSION_HASH_SIZE 512
493 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
496 hash_sessionid(struct nfs4_sessionid
*sessionid
)
498 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
500 return sid
->sequence
% SESSION_HASH_SIZE
;
504 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
506 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
507 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
511 gen_sessionid(struct nfsd4_session
*ses
)
513 struct nfs4_client
*clp
= ses
->se_client
;
514 struct nfsd4_sessionid
*sid
;
516 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
517 sid
->clientid
= clp
->cl_clientid
;
518 sid
->sequence
= current_sessionid
++;
523 * The protocol defines ca_maxresponssize_cached to include the size of
524 * the rpc header, but all we need to cache is the data starting after
525 * the end of the initial SEQUENCE operation--the rest we regenerate
526 * each time. Therefore we can advertise a ca_maxresponssize_cached
527 * value that is the number of bytes in our cache plus a few additional
528 * bytes. In order to stay on the safe side, and not promise more than
529 * we can cache, those additional bytes must be the minimum possible: 24
530 * bytes of rpc header (xid through accept state, with AUTH_NULL
531 * verifier), 12 for the compound header (with zero-length tag), and 44
532 * for the SEQUENCE op response:
534 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
537 free_session_slots(struct nfsd4_session
*ses
)
541 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
542 kfree(ses
->se_slots
[i
]);
546 * We don't actually need to cache the rpc and session headers, so we
547 * can allocate a little less for each slot:
549 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
551 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
554 static int nfsd4_sanitize_slot_size(u32 size
)
556 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
557 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
563 * XXX: If we run out of reserved DRC memory we could (up to a point)
564 * re-negotiate active sessions and reduce their slot usage to make
565 * rooom for new connections. For now we just fail the create session.
567 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
571 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
573 spin_lock(&nfsd_drc_lock
);
574 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
575 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
576 num
= min_t(int, num
, avail
/ slotsize
);
577 nfsd_drc_mem_used
+= num
* slotsize
;
578 spin_unlock(&nfsd_drc_lock
);
583 static void nfsd4_put_drc_mem(int slotsize
, int num
)
585 spin_lock(&nfsd_drc_lock
);
586 nfsd_drc_mem_used
-= slotsize
* num
;
587 spin_unlock(&nfsd_drc_lock
);
590 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
592 struct nfsd4_session
*new;
595 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
596 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
597 mem
= numslots
* sizeof(struct nfsd4_slot
*);
599 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
602 /* allocate each struct nfsd4_slot and data cache in one piece */
603 for (i
= 0; i
< numslots
; i
++) {
604 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
605 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
606 if (!new->se_slots
[i
])
612 kfree(new->se_slots
[i
]);
617 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
619 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
621 new->maxreqs
= numslots
;
622 new->maxresp_cached
= slotsize
+ NFSD_MIN_HDR_SEQ_SZ
;
623 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
624 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
625 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
628 static void free_conn(struct nfsd4_conn
*c
)
630 svc_xprt_put(c
->cn_xprt
);
634 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
636 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
637 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
639 spin_lock(&clp
->cl_lock
);
640 if (!list_empty(&c
->cn_persession
)) {
641 list_del(&c
->cn_persession
);
644 spin_unlock(&clp
->cl_lock
);
645 nfsd4_probe_callback(clp
);
648 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
650 struct nfsd4_conn
*conn
;
652 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
655 svc_xprt_get(rqstp
->rq_xprt
);
656 conn
->cn_xprt
= rqstp
->rq_xprt
;
657 conn
->cn_flags
= flags
;
658 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
662 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
664 conn
->cn_session
= ses
;
665 list_add(&conn
->cn_persession
, &ses
->se_conns
);
668 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
670 struct nfs4_client
*clp
= ses
->se_client
;
672 spin_lock(&clp
->cl_lock
);
673 __nfsd4_hash_conn(conn
, ses
);
674 spin_unlock(&clp
->cl_lock
);
677 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
679 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
680 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
683 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
685 struct nfsd4_conn
*conn
;
688 conn
= alloc_conn(rqstp
, dir
);
690 return nfserr_jukebox
;
691 nfsd4_hash_conn(conn
, ses
);
692 ret
= nfsd4_register_conn(conn
);
694 /* oops; xprt is already down: */
695 nfsd4_conn_lost(&conn
->cn_xpt_user
);
699 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
701 u32 dir
= NFS4_CDFC4_FORE
;
703 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
704 dir
|= NFS4_CDFC4_BACK
;
706 return nfsd4_new_conn(rqstp
, ses
, dir
);
709 /* must be called under client_lock */
710 static void nfsd4_del_conns(struct nfsd4_session
*s
)
712 struct nfs4_client
*clp
= s
->se_client
;
713 struct nfsd4_conn
*c
;
715 spin_lock(&clp
->cl_lock
);
716 while (!list_empty(&s
->se_conns
)) {
717 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
718 list_del_init(&c
->cn_persession
);
719 spin_unlock(&clp
->cl_lock
);
721 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
724 spin_lock(&clp
->cl_lock
);
726 spin_unlock(&clp
->cl_lock
);
729 void free_session(struct kref
*kref
)
731 struct nfsd4_session
*ses
;
734 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
735 nfsd4_del_conns(ses
);
736 spin_lock(&nfsd_drc_lock
);
737 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
738 nfsd_drc_mem_used
-= mem
;
739 spin_unlock(&nfsd_drc_lock
);
740 free_session_slots(ses
);
744 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
746 struct nfsd4_session
*new;
747 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
748 int numslots
, slotsize
;
753 * Note decreasing slot size below client's request may
754 * make it difficult for client to function correctly, whereas
755 * decreasing the number of slots will (just?) affect
756 * performance. When short on memory we therefore prefer to
757 * decrease number of slots instead of their size.
759 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
760 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
764 new = alloc_session(slotsize
, numslots
);
766 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
769 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
771 new->se_client
= clp
;
774 INIT_LIST_HEAD(&new->se_conns
);
776 new->se_cb_seq_nr
= 1;
777 new->se_flags
= cses
->flags
;
778 new->se_cb_prog
= cses
->callback_prog
;
779 kref_init(&new->se_ref
);
780 idx
= hash_sessionid(&new->se_sessionid
);
781 spin_lock(&client_lock
);
782 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
783 spin_lock(&clp
->cl_lock
);
784 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
785 spin_unlock(&clp
->cl_lock
);
786 spin_unlock(&client_lock
);
788 status
= nfsd4_new_conn_from_crses(rqstp
, new);
789 /* whoops: benny points out, status is ignored! (err, or bogus) */
791 free_session(&new->se_ref
);
794 if (cses
->flags
& SESSION4_BACK_CHAN
) {
795 struct sockaddr
*sa
= svc_addr(rqstp
);
797 * This is a little silly; with sessions there's no real
798 * use for the callback address. Use the peer address
799 * as a reasonable default for now, but consider fixing
800 * the rpc client not to require an address in the
803 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
804 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
806 nfsd4_probe_callback(clp
);
810 /* caller must hold client_lock */
811 static struct nfsd4_session
*
812 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
814 struct nfsd4_session
*elem
;
817 dump_sessionid(__func__
, sessionid
);
818 idx
= hash_sessionid(sessionid
);
819 /* Search in the appropriate list */
820 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
821 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
822 NFS4_MAX_SESSIONID_LEN
)) {
827 dprintk("%s: session not found\n", __func__
);
831 /* caller must hold client_lock */
833 unhash_session(struct nfsd4_session
*ses
)
835 list_del(&ses
->se_hash
);
836 spin_lock(&ses
->se_client
->cl_lock
);
837 list_del(&ses
->se_perclnt
);
838 spin_unlock(&ses
->se_client
->cl_lock
);
841 /* must be called under the client_lock */
843 renew_client_locked(struct nfs4_client
*clp
)
845 if (is_client_expired(clp
)) {
846 dprintk("%s: client (clientid %08x/%08x) already expired\n",
848 clp
->cl_clientid
.cl_boot
,
849 clp
->cl_clientid
.cl_id
);
854 * Move client to the end to the LRU list.
856 dprintk("renewing client (clientid %08x/%08x)\n",
857 clp
->cl_clientid
.cl_boot
,
858 clp
->cl_clientid
.cl_id
);
859 list_move_tail(&clp
->cl_lru
, &client_lru
);
860 clp
->cl_time
= get_seconds();
864 renew_client(struct nfs4_client
*clp
)
866 spin_lock(&client_lock
);
867 renew_client_locked(clp
);
868 spin_unlock(&client_lock
);
871 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
873 STALE_CLIENTID(clientid_t
*clid
)
875 if (clid
->cl_boot
== boot_time
)
877 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
878 clid
->cl_boot
, clid
->cl_id
, boot_time
);
883 * XXX Should we use a slab cache ?
884 * This type of memory management is somewhat inefficient, but we use it
885 * anyway since SETCLIENTID is not a common operation.
887 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
889 struct nfs4_client
*clp
;
891 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
894 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
895 if (clp
->cl_name
.data
== NULL
) {
899 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
900 clp
->cl_name
.len
= name
.len
;
905 free_client(struct nfs4_client
*clp
)
907 while (!list_empty(&clp
->cl_sessions
)) {
908 struct nfsd4_session
*ses
;
909 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
911 list_del(&ses
->se_perclnt
);
912 nfsd4_put_session(ses
);
914 if (clp
->cl_cred
.cr_group_info
)
915 put_group_info(clp
->cl_cred
.cr_group_info
);
916 kfree(clp
->cl_principal
);
917 kfree(clp
->cl_name
.data
);
922 release_session_client(struct nfsd4_session
*session
)
924 struct nfs4_client
*clp
= session
->se_client
;
926 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
928 if (is_client_expired(clp
)) {
930 session
->se_client
= NULL
;
932 renew_client_locked(clp
);
933 spin_unlock(&client_lock
);
936 /* must be called under the client_lock */
938 unhash_client_locked(struct nfs4_client
*clp
)
940 struct nfsd4_session
*ses
;
942 mark_client_expired(clp
);
943 list_del(&clp
->cl_lru
);
944 spin_lock(&clp
->cl_lock
);
945 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
946 list_del_init(&ses
->se_hash
);
947 spin_unlock(&clp
->cl_lock
);
951 expire_client(struct nfs4_client
*clp
)
953 struct nfs4_stateowner
*sop
;
954 struct nfs4_delegation
*dp
;
955 struct list_head reaplist
;
957 INIT_LIST_HEAD(&reaplist
);
958 spin_lock(&recall_lock
);
959 while (!list_empty(&clp
->cl_delegations
)) {
960 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
961 list_del_init(&dp
->dl_perclnt
);
962 list_move(&dp
->dl_recall_lru
, &reaplist
);
964 spin_unlock(&recall_lock
);
965 while (!list_empty(&reaplist
)) {
966 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
967 list_del_init(&dp
->dl_recall_lru
);
968 unhash_delegation(dp
);
970 while (!list_empty(&clp
->cl_openowners
)) {
971 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
972 release_openowner(sop
);
974 nfsd4_shutdown_callback(clp
);
975 if (clp
->cl_cb_conn
.cb_xprt
)
976 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
977 list_del(&clp
->cl_idhash
);
978 list_del(&clp
->cl_strhash
);
979 spin_lock(&client_lock
);
980 unhash_client_locked(clp
);
981 if (atomic_read(&clp
->cl_refcount
) == 0)
983 spin_unlock(&client_lock
);
986 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
988 memcpy(target
->cl_verifier
.data
, source
->data
,
989 sizeof(target
->cl_verifier
.data
));
992 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
994 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
995 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
998 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1000 target
->cr_uid
= source
->cr_uid
;
1001 target
->cr_gid
= source
->cr_gid
;
1002 target
->cr_group_info
= source
->cr_group_info
;
1003 get_group_info(target
->cr_group_info
);
1006 static int same_name(const char *n1
, const char *n2
)
1008 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1012 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1014 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1018 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1020 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1023 /* XXX what about NGROUP */
1025 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1027 return cr1
->cr_uid
== cr2
->cr_uid
;
1030 static void gen_clid(struct nfs4_client
*clp
)
1032 static u32 current_clientid
= 1;
1034 clp
->cl_clientid
.cl_boot
= boot_time
;
1035 clp
->cl_clientid
.cl_id
= current_clientid
++;
1038 static void gen_confirm(struct nfs4_client
*clp
)
1043 p
= (u32
*)clp
->cl_confirm
.data
;
1044 *p
++ = get_seconds();
1048 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1049 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1051 struct nfs4_client
*clp
;
1052 struct sockaddr
*sa
= svc_addr(rqstp
);
1055 clp
= alloc_client(name
);
1059 INIT_LIST_HEAD(&clp
->cl_sessions
);
1061 princ
= svc_gss_principal(rqstp
);
1063 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1064 if (clp
->cl_principal
== NULL
) {
1070 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1071 atomic_set(&clp
->cl_refcount
, 0);
1072 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1073 INIT_LIST_HEAD(&clp
->cl_idhash
);
1074 INIT_LIST_HEAD(&clp
->cl_strhash
);
1075 INIT_LIST_HEAD(&clp
->cl_openowners
);
1076 INIT_LIST_HEAD(&clp
->cl_delegations
);
1077 INIT_LIST_HEAD(&clp
->cl_lru
);
1078 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1079 spin_lock_init(&clp
->cl_lock
);
1080 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1081 clp
->cl_time
= get_seconds();
1082 clear_bit(0, &clp
->cl_cb_slot_busy
);
1083 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1084 copy_verf(clp
, verf
);
1085 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1086 clp
->cl_flavor
= rqstp
->rq_flavor
;
1087 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1089 clp
->cl_cb_session
= NULL
;
1093 static int check_name(struct xdr_netobj name
)
1097 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1098 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1105 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1107 unsigned int idhashval
;
1109 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1110 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1111 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1116 move_to_confirmed(struct nfs4_client
*clp
)
1118 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1119 unsigned int strhashval
;
1121 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1122 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1123 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1124 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1128 static struct nfs4_client
*
1129 find_confirmed_client(clientid_t
*clid
)
1131 struct nfs4_client
*clp
;
1132 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1134 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1135 if (same_clid(&clp
->cl_clientid
, clid
))
1141 static struct nfs4_client
*
1142 find_unconfirmed_client(clientid_t
*clid
)
1144 struct nfs4_client
*clp
;
1145 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1147 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1148 if (same_clid(&clp
->cl_clientid
, clid
))
1154 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1156 return clp
->cl_exchange_flags
!= 0;
1159 static struct nfs4_client
*
1160 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1162 struct nfs4_client
*clp
;
1164 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1165 if (same_name(clp
->cl_recdir
, dname
))
1171 static struct nfs4_client
*
1172 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1174 struct nfs4_client
*clp
;
1176 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1177 if (same_name(clp
->cl_recdir
, dname
))
1183 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1187 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1188 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1191 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1192 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1198 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1200 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1201 struct sockaddr
*sa
= svc_addr(rqstp
);
1202 u32 scopeid
= rpc_get_scope_id(sa
);
1203 unsigned short expected_family
;
1205 /* Currently, we only support tcp and tcp6 for the callback channel */
1206 if (se
->se_callback_netid_len
== 3 &&
1207 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1208 expected_family
= AF_INET
;
1209 else if (se
->se_callback_netid_len
== 4 &&
1210 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1211 expected_family
= AF_INET6
;
1215 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1216 se
->se_callback_addr_len
,
1217 (struct sockaddr
*)&conn
->cb_addr
,
1218 sizeof(conn
->cb_addr
));
1220 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1223 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1224 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1226 conn
->cb_prog
= se
->se_callback_prog
;
1227 conn
->cb_ident
= se
->se_callback_ident
;
1228 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1231 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1232 conn
->cb_addrlen
= 0;
1233 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1234 "will not receive delegations\n",
1235 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1241 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1244 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1246 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1249 dprintk("--> %s slot %p\n", __func__
, slot
);
1251 slot
->sl_opcnt
= resp
->opcnt
;
1252 slot
->sl_status
= resp
->cstate
.status
;
1254 if (nfsd4_not_cached(resp
)) {
1255 slot
->sl_datalen
= 0;
1258 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1259 base
= (char *)resp
->cstate
.datap
-
1260 (char *)resp
->xbuf
->head
[0].iov_base
;
1261 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1263 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1268 * Encode the replay sequence operation from the slot values.
1269 * If cachethis is FALSE encode the uncached rep error on the next
1270 * operation which sets resp->p and increments resp->opcnt for
1271 * nfs4svc_encode_compoundres.
1275 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1276 struct nfsd4_compoundres
*resp
)
1278 struct nfsd4_op
*op
;
1279 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1281 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1282 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1284 /* Encode the replayed sequence operation */
1285 op
= &args
->ops
[resp
->opcnt
- 1];
1286 nfsd4_encode_operation(resp
, op
);
1288 /* Return nfserr_retry_uncached_rep in next operation. */
1289 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1290 op
= &args
->ops
[resp
->opcnt
++];
1291 op
->status
= nfserr_retry_uncached_rep
;
1292 nfsd4_encode_operation(resp
, op
);
1298 * The sequence operation is not cached because we can use the slot and
1302 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1303 struct nfsd4_sequence
*seq
)
1305 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1308 dprintk("--> %s slot %p\n", __func__
, slot
);
1310 /* Either returns 0 or nfserr_retry_uncached */
1311 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1312 if (status
== nfserr_retry_uncached_rep
)
1315 /* The sequence operation has been encoded, cstate->datap set. */
1316 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1318 resp
->opcnt
= slot
->sl_opcnt
;
1319 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1320 status
= slot
->sl_status
;
1326 * Set the exchange_id flags returned by the server.
1329 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1331 /* pNFS is not supported */
1332 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1334 /* Referrals are supported, Migration is not. */
1335 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1337 /* set the wire flags to return to client. */
1338 clid
->flags
= new->cl_exchange_flags
;
1342 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1343 struct nfsd4_compound_state
*cstate
,
1344 struct nfsd4_exchange_id
*exid
)
1346 struct nfs4_client
*unconf
, *conf
, *new;
1348 unsigned int strhashval
;
1349 char dname
[HEXDIR_LEN
];
1350 char addr_str
[INET6_ADDRSTRLEN
];
1351 nfs4_verifier verf
= exid
->verifier
;
1352 struct sockaddr
*sa
= svc_addr(rqstp
);
1354 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1355 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1356 "ip_addr=%s flags %x, spa_how %d\n",
1357 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1358 addr_str
, exid
->flags
, exid
->spa_how
);
1360 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1361 return nfserr_inval
;
1363 /* Currently only support SP4_NONE */
1364 switch (exid
->spa_how
) {
1368 return nfserr_serverfault
;
1370 BUG(); /* checked by xdr code */
1372 return nfserr_serverfault
; /* no excuse :-/ */
1375 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1380 strhashval
= clientstr_hashval(dname
);
1385 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1387 if (!clp_used_exchangeid(conf
)) {
1388 status
= nfserr_clid_inuse
; /* XXX: ? */
1391 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1392 /* 18.35.4 case 8 */
1393 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1394 status
= nfserr_not_same
;
1397 /* Client reboot: destroy old state */
1398 expire_client(conf
);
1401 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1402 /* 18.35.4 case 9 */
1403 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1404 status
= nfserr_perm
;
1407 expire_client(conf
);
1411 * Set bit when the owner id and verifier map to an already
1412 * confirmed client id (18.35.3).
1414 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1417 * Falling into 18.35.4 case 2, possible router replay.
1418 * Leave confirmed record intact and return same result.
1420 copy_verf(conf
, &verf
);
1425 /* 18.35.4 case 7 */
1426 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1427 status
= nfserr_noent
;
1431 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1434 * Possible retry or client restart. Per 18.35.4 case 4,
1435 * a new unconfirmed record should be generated regardless
1436 * of whether any properties have changed.
1438 expire_client(unconf
);
1443 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1445 status
= nfserr_jukebox
;
1450 add_to_unconfirmed(new, strhashval
);
1452 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1453 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1456 nfsd4_set_ex_flags(new, exid
);
1458 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1459 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1463 nfs4_unlock_state();
1465 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1470 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1472 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1475 /* The slot is in use, and no response has been sent. */
1477 if (seqid
== slot_seqid
)
1478 return nfserr_jukebox
;
1480 return nfserr_seq_misordered
;
1483 if (likely(seqid
== slot_seqid
+ 1))
1486 if (seqid
== slot_seqid
)
1487 return nfserr_replay_cache
;
1489 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1491 /* Misordered replay or misordered new request */
1492 return nfserr_seq_misordered
;
1496 * Cache the create session result into the create session single DRC
1497 * slot cache by saving the xdr structure. sl_seqid has been set.
1498 * Do this for solo or embedded create session operations.
1501 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1502 struct nfsd4_clid_slot
*slot
, int nfserr
)
1504 slot
->sl_status
= nfserr
;
1505 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1509 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1510 struct nfsd4_clid_slot
*slot
)
1512 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1513 return slot
->sl_status
;
1517 nfsd4_create_session(struct svc_rqst
*rqstp
,
1518 struct nfsd4_compound_state
*cstate
,
1519 struct nfsd4_create_session
*cr_ses
)
1521 struct sockaddr
*sa
= svc_addr(rqstp
);
1522 struct nfs4_client
*conf
, *unconf
;
1523 struct nfsd4_session
*new;
1524 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1525 bool confirm_me
= false;
1529 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1530 conf
= find_confirmed_client(&cr_ses
->clientid
);
1533 cs_slot
= &conf
->cl_cs_slot
;
1534 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1535 if (status
== nfserr_replay_cache
) {
1536 dprintk("Got a create_session replay! seqid= %d\n",
1538 /* Return the cached reply status */
1539 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1541 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1542 status
= nfserr_seq_misordered
;
1543 dprintk("Sequence misordered!\n");
1544 dprintk("Expected seqid= %d but got seqid= %d\n",
1545 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1548 } else if (unconf
) {
1549 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1550 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1551 status
= nfserr_clid_inuse
;
1555 cs_slot
= &unconf
->cl_cs_slot
;
1556 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1558 /* an unconfirmed replay returns misordered */
1559 status
= nfserr_seq_misordered
;
1566 status
= nfserr_stale_clientid
;
1571 * XXX: we should probably set this at creation time, and check
1572 * for consistent minorversion use throughout:
1574 conf
->cl_minorversion
= 1;
1576 * We do not support RDMA or persistent sessions
1578 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1579 cr_ses
->flags
&= ~SESSION4_RDMA
;
1581 status
= nfserr_jukebox
;
1582 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1586 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1587 NFS4_MAX_SESSIONID_LEN
);
1588 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1589 sizeof(struct nfsd4_channel_attrs
));
1590 cs_slot
->sl_seqid
++;
1591 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1593 /* cache solo and embedded create sessions under the state lock */
1594 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1596 move_to_confirmed(conf
);
1598 nfs4_unlock_state();
1599 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1603 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1605 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1606 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1608 return argp
->opcnt
== resp
->opcnt
;
1611 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1614 case NFS4_CDFC4_FORE
:
1615 case NFS4_CDFC4_BACK
:
1617 case NFS4_CDFC4_FORE_OR_BOTH
:
1618 case NFS4_CDFC4_BACK_OR_BOTH
:
1619 *dir
= NFS4_CDFC4_BOTH
;
1622 return nfserr_inval
;
1625 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1626 struct nfsd4_compound_state
*cstate
,
1627 struct nfsd4_bind_conn_to_session
*bcts
)
1631 if (!nfsd4_last_compound_op(rqstp
))
1632 return nfserr_not_only_op
;
1633 spin_lock(&client_lock
);
1634 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1635 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1636 * client_lock iself: */
1637 if (cstate
->session
) {
1638 nfsd4_get_session(cstate
->session
);
1639 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1641 spin_unlock(&client_lock
);
1642 if (!cstate
->session
)
1643 return nfserr_badsession
;
1645 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1646 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1650 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1654 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1658 nfsd4_destroy_session(struct svc_rqst
*r
,
1659 struct nfsd4_compound_state
*cstate
,
1660 struct nfsd4_destroy_session
*sessionid
)
1662 struct nfsd4_session
*ses
;
1663 u32 status
= nfserr_badsession
;
1666 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1667 * - Should we return nfserr_back_chan_busy if waiting for
1668 * callbacks on to-be-destroyed session?
1669 * - Do we need to clear any callback info from previous session?
1672 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1673 if (!nfsd4_last_compound_op(r
))
1674 return nfserr_not_only_op
;
1676 dump_sessionid(__func__
, &sessionid
->sessionid
);
1677 spin_lock(&client_lock
);
1678 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1680 spin_unlock(&client_lock
);
1684 unhash_session(ses
);
1685 spin_unlock(&client_lock
);
1688 nfsd4_probe_callback_sync(ses
->se_client
);
1689 nfs4_unlock_state();
1691 nfsd4_del_conns(ses
);
1693 nfsd4_put_session(ses
);
1696 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1700 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1702 struct nfsd4_conn
*c
;
1704 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1705 if (c
->cn_xprt
== xpt
) {
1712 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1714 struct nfs4_client
*clp
= ses
->se_client
;
1715 struct nfsd4_conn
*c
;
1718 spin_lock(&clp
->cl_lock
);
1719 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1721 spin_unlock(&clp
->cl_lock
);
1725 __nfsd4_hash_conn(new, ses
);
1726 spin_unlock(&clp
->cl_lock
);
1727 ret
= nfsd4_register_conn(new);
1729 /* oops; xprt is already down: */
1730 nfsd4_conn_lost(&new->cn_xpt_user
);
1735 nfsd4_sequence(struct svc_rqst
*rqstp
,
1736 struct nfsd4_compound_state
*cstate
,
1737 struct nfsd4_sequence
*seq
)
1739 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1740 struct nfsd4_session
*session
;
1741 struct nfsd4_slot
*slot
;
1742 struct nfsd4_conn
*conn
;
1745 if (resp
->opcnt
!= 1)
1746 return nfserr_sequence_pos
;
1749 * Will be either used or freed by nfsd4_sequence_check_conn
1752 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1754 return nfserr_jukebox
;
1756 spin_lock(&client_lock
);
1757 status
= nfserr_badsession
;
1758 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1762 status
= nfserr_badslot
;
1763 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1766 slot
= session
->se_slots
[seq
->slotid
];
1767 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1769 /* We do not negotiate the number of slots yet, so set the
1770 * maxslots to the session maxreqs which is used to encode
1771 * sr_highest_slotid and the sr_target_slot id to maxslots */
1772 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1774 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1775 if (status
== nfserr_replay_cache
) {
1776 cstate
->slot
= slot
;
1777 cstate
->session
= session
;
1778 /* Return the cached reply status and set cstate->status
1779 * for nfsd4_proc_compound processing */
1780 status
= nfsd4_replay_cache_entry(resp
, seq
);
1781 cstate
->status
= nfserr_replay_cache
;
1787 nfsd4_sequence_check_conn(conn
, session
);
1790 /* Success! bump slot seqid */
1791 slot
->sl_inuse
= true;
1792 slot
->sl_seqid
= seq
->seqid
;
1793 slot
->sl_cachethis
= seq
->cachethis
;
1795 cstate
->slot
= slot
;
1796 cstate
->session
= session
;
1799 /* Hold a session reference until done processing the compound. */
1800 if (cstate
->session
) {
1801 struct nfs4_client
*clp
= session
->se_client
;
1803 nfsd4_get_session(cstate
->session
);
1804 atomic_inc(&clp
->cl_refcount
);
1805 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1806 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1809 spin_unlock(&client_lock
);
1810 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1815 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1817 if (rc
->rca_one_fs
) {
1818 if (!cstate
->current_fh
.fh_dentry
)
1819 return nfserr_nofilehandle
;
1821 * We don't take advantage of the rca_one_fs case.
1822 * That's OK, it's optional, we can safely ignore it.
1827 if (is_client_expired(cstate
->session
->se_client
)) {
1828 nfs4_unlock_state();
1830 * The following error isn't really legal.
1831 * But we only get here if the client just explicitly
1832 * destroyed the client. Surely it no longer cares what
1833 * error it gets back on an operation for the dead
1836 return nfserr_stale_clientid
;
1838 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1839 nfs4_unlock_state();
1844 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1845 struct nfsd4_setclientid
*setclid
)
1847 struct xdr_netobj clname
= {
1848 .len
= setclid
->se_namelen
,
1849 .data
= setclid
->se_name
,
1851 nfs4_verifier clverifier
= setclid
->se_verf
;
1852 unsigned int strhashval
;
1853 struct nfs4_client
*conf
, *unconf
, *new;
1855 char dname
[HEXDIR_LEN
];
1857 if (!check_name(clname
))
1858 return nfserr_inval
;
1860 status
= nfs4_make_rec_clidname(dname
, &clname
);
1865 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1866 * We get here on a DRC miss.
1869 strhashval
= clientstr_hashval(dname
);
1872 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1874 /* RFC 3530 14.2.33 CASE 0: */
1875 status
= nfserr_clid_inuse
;
1876 if (clp_used_exchangeid(conf
))
1878 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1879 char addr_str
[INET6_ADDRSTRLEN
];
1880 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1882 dprintk("NFSD: setclientid: string in use by client "
1883 "at %s\n", addr_str
);
1888 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1889 * has a description of SETCLIENTID request processing consisting
1890 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1892 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1893 status
= nfserr_resource
;
1896 * RFC 3530 14.2.33 CASE 4:
1897 * placed first, because it is the normal case
1900 expire_client(unconf
);
1901 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1905 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1907 * RFC 3530 14.2.33 CASE 1:
1908 * probable callback update
1911 /* Note this is removing unconfirmed {*x***},
1912 * which is stronger than RFC recommended {vxc**}.
1913 * This has the advantage that there is at most
1914 * one {*x***} in either list at any time.
1916 expire_client(unconf
);
1918 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1921 copy_clid(new, conf
);
1922 } else if (!unconf
) {
1924 * RFC 3530 14.2.33 CASE 2:
1925 * probable client reboot; state will be removed if
1928 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1934 * RFC 3530 14.2.33 CASE 3:
1935 * probable client reboot; state will be removed if
1938 expire_client(unconf
);
1939 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1945 * XXX: we should probably set this at creation time, and check
1946 * for consistent minorversion use throughout:
1948 new->cl_minorversion
= 0;
1949 gen_callback(new, setclid
, rqstp
);
1950 add_to_unconfirmed(new, strhashval
);
1951 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1952 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
1953 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
1956 nfs4_unlock_state();
1962 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1963 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1964 * bullets, labeled as CASE1 - CASE4 below.
1967 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
1968 struct nfsd4_compound_state
*cstate
,
1969 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
1971 struct sockaddr
*sa
= svc_addr(rqstp
);
1972 struct nfs4_client
*conf
, *unconf
;
1973 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
1974 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
1977 if (STALE_CLIENTID(clid
))
1978 return nfserr_stale_clientid
;
1980 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1981 * We get here on a DRC miss.
1986 conf
= find_confirmed_client(clid
);
1987 unconf
= find_unconfirmed_client(clid
);
1989 status
= nfserr_clid_inuse
;
1990 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
1992 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
1996 * section 14.2.34 of RFC 3530 has a description of
1997 * SETCLIENTID_CONFIRM request processing consisting
1998 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2000 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2002 * RFC 3530 14.2.34 CASE 1:
2005 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2006 status
= nfserr_clid_inuse
;
2008 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2009 nfsd4_probe_callback(conf
);
2010 expire_client(unconf
);
2014 } else if (conf
&& !unconf
) {
2016 * RFC 3530 14.2.34 CASE 2:
2017 * probable retransmitted request; play it safe and
2020 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2021 status
= nfserr_clid_inuse
;
2024 } else if (!conf
&& unconf
2025 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2027 * RFC 3530 14.2.34 CASE 3:
2028 * Normal case; new or rebooted client:
2030 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2031 status
= nfserr_clid_inuse
;
2034 clientstr_hashval(unconf
->cl_recdir
);
2035 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2038 nfsd4_remove_clid_dir(conf
);
2039 expire_client(conf
);
2041 move_to_confirmed(unconf
);
2043 nfsd4_probe_callback(conf
);
2046 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2047 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2050 * RFC 3530 14.2.34 CASE 4:
2051 * Client probably hasn't noticed that we rebooted yet.
2053 status
= nfserr_stale_clientid
;
2055 /* check that we have hit one of the cases...*/
2056 status
= nfserr_clid_inuse
;
2059 nfs4_unlock_state();
2063 /* OPEN Share state helper functions */
2064 static inline struct nfs4_file
*
2065 alloc_init_file(struct inode
*ino
)
2067 struct nfs4_file
*fp
;
2068 unsigned int hashval
= file_hashval(ino
);
2070 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2072 atomic_set(&fp
->fi_ref
, 1);
2073 INIT_LIST_HEAD(&fp
->fi_hash
);
2074 INIT_LIST_HEAD(&fp
->fi_stateids
);
2075 INIT_LIST_HEAD(&fp
->fi_delegations
);
2076 fp
->fi_inode
= igrab(ino
);
2077 fp
->fi_id
= current_fileid
++;
2078 fp
->fi_had_conflict
= false;
2079 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2080 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2081 spin_lock(&recall_lock
);
2082 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2083 spin_unlock(&recall_lock
);
2090 nfsd4_free_slab(struct kmem_cache
**slab
)
2094 kmem_cache_destroy(*slab
);
2099 nfsd4_free_slabs(void)
2101 nfsd4_free_slab(&stateowner_slab
);
2102 nfsd4_free_slab(&file_slab
);
2103 nfsd4_free_slab(&stateid_slab
);
2104 nfsd4_free_slab(&deleg_slab
);
2108 nfsd4_init_slabs(void)
2110 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
2111 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
2112 if (stateowner_slab
== NULL
)
2114 file_slab
= kmem_cache_create("nfsd4_files",
2115 sizeof(struct nfs4_file
), 0, 0, NULL
);
2116 if (file_slab
== NULL
)
2118 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2119 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2120 if (stateid_slab
== NULL
)
2122 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2123 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2124 if (deleg_slab
== NULL
)
2129 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2134 nfs4_free_stateowner(struct kref
*kref
)
2136 struct nfs4_stateowner
*sop
=
2137 container_of(kref
, struct nfs4_stateowner
, so_ref
);
2138 kfree(sop
->so_owner
.data
);
2139 kmem_cache_free(stateowner_slab
, sop
);
2142 static inline struct nfs4_stateowner
*
2143 alloc_stateowner(struct xdr_netobj
*owner
)
2145 struct nfs4_stateowner
*sop
;
2147 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
2148 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
2149 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
2150 sop
->so_owner
.len
= owner
->len
;
2151 kref_init(&sop
->so_ref
);
2154 kmem_cache_free(stateowner_slab
, sop
);
2159 static struct nfs4_stateowner
*
2160 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2161 struct nfs4_stateowner
*sop
;
2162 struct nfs4_replay
*rp
;
2163 unsigned int idhashval
;
2165 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
2167 idhashval
= ownerid_hashval(current_ownerid
);
2168 INIT_LIST_HEAD(&sop
->so_idhash
);
2169 INIT_LIST_HEAD(&sop
->so_strhash
);
2170 INIT_LIST_HEAD(&sop
->so_perclient
);
2171 INIT_LIST_HEAD(&sop
->so_stateids
);
2172 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
2173 INIT_LIST_HEAD(&sop
->so_close_lru
);
2175 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
2176 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2177 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
2178 sop
->so_is_open_owner
= 1;
2179 sop
->so_id
= current_ownerid
++;
2180 sop
->so_client
= clp
;
2181 sop
->so_seqid
= open
->op_seqid
;
2182 sop
->so_confirmed
= 0;
2183 rp
= &sop
->so_replay
;
2184 rp
->rp_status
= nfserr_serverfault
;
2186 rp
->rp_buf
= rp
->rp_ibuf
;
2191 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2192 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2193 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2195 INIT_LIST_HEAD(&stp
->st_hash
);
2196 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2197 INIT_LIST_HEAD(&stp
->st_lockowners
);
2198 INIT_LIST_HEAD(&stp
->st_perfile
);
2199 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2200 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2201 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2202 stp
->st_stateowner
= sop
;
2205 stp
->st_stateid
.si_boot
= boot_time
;
2206 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2207 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2208 stp
->st_stateid
.si_generation
= 0;
2209 stp
->st_access_bmap
= 0;
2210 stp
->st_deny_bmap
= 0;
2211 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2212 &stp
->st_access_bmap
);
2213 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2214 stp
->st_openstp
= NULL
;
2218 move_to_close_lru(struct nfs4_stateowner
*sop
)
2220 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
2222 list_move_tail(&sop
->so_close_lru
, &close_lru
);
2223 sop
->so_time
= get_seconds();
2227 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2230 return (sop
->so_owner
.len
== owner
->len
) &&
2231 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2232 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2235 static struct nfs4_stateowner
*
2236 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2238 struct nfs4_stateowner
*so
= NULL
;
2240 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2241 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2247 /* search file_hashtbl[] for file */
2248 static struct nfs4_file
*
2249 find_file(struct inode
*ino
)
2251 unsigned int hashval
= file_hashval(ino
);
2252 struct nfs4_file
*fp
;
2254 spin_lock(&recall_lock
);
2255 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2256 if (fp
->fi_inode
== ino
) {
2258 spin_unlock(&recall_lock
);
2262 spin_unlock(&recall_lock
);
2266 static inline int access_valid(u32 x
, u32 minorversion
)
2268 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2270 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2272 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2273 if (minorversion
&& x
) {
2274 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2276 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2278 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2285 static inline int deny_valid(u32 x
)
2287 /* Note: unlike access bits, deny bits may be zero. */
2288 return x
<= NFS4_SHARE_DENY_BOTH
;
2292 * Called to check deny when READ with all zero stateid or
2293 * WRITE with all zero or all one stateid
2296 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2298 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2299 struct nfs4_file
*fp
;
2300 struct nfs4_stateid
*stp
;
2303 dprintk("NFSD: nfs4_share_conflict\n");
2305 fp
= find_file(ino
);
2308 ret
= nfserr_locked
;
2309 /* Search for conflicting share reservations */
2310 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2311 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2312 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2322 nfs4_file_downgrade(struct nfs4_file
*fp
, unsigned int share_access
)
2324 if (share_access
& NFS4_SHARE_ACCESS_WRITE
)
2325 nfs4_file_put_access(fp
, O_WRONLY
);
2326 if (share_access
& NFS4_SHARE_ACCESS_READ
)
2327 nfs4_file_put_access(fp
, O_RDONLY
);
2330 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2332 /* We're assuming the state code never drops its reference
2333 * without first removing the lease. Since we're in this lease
2334 * callback (and since the lease code is serialized by the kernel
2335 * lock) we know the server hasn't removed the lease yet, we know
2336 * it's safe to take a reference: */
2337 atomic_inc(&dp
->dl_count
);
2339 spin_lock(&recall_lock
);
2340 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2341 spin_unlock(&recall_lock
);
2343 /* only place dl_time is set. protected by lock_flocks*/
2344 dp
->dl_time
= get_seconds();
2346 nfsd4_cb_recall(dp
);
2350 * Called from break_lease() with lock_flocks() held.
2351 * Note: we assume break_lease will only call this *once* for any given
2354 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2356 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2360 * We don't want the locks code to timeout the lease for us;
2361 * we'll remove it ourself if the delegation isn't returned
2364 fl
->fl_break_time
= 0;
2366 nfsd_break_one_deleg(dp
);
2367 dp
->dl_file
->fi_had_conflict
= true;
2371 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2374 return lease_modify(onlist
, arg
);
2379 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2380 .fl_break
= nfsd_break_deleg_cb
,
2381 .fl_change
= nfsd_change_deleg_cb
,
2386 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2387 struct nfsd4_open
*open
)
2389 clientid_t
*clientid
= &open
->op_clientid
;
2390 struct nfs4_client
*clp
= NULL
;
2391 unsigned int strhashval
;
2392 struct nfs4_stateowner
*sop
= NULL
;
2394 if (!check_name(open
->op_owner
))
2395 return nfserr_inval
;
2397 if (STALE_CLIENTID(&open
->op_clientid
))
2398 return nfserr_stale_clientid
;
2400 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
2401 sop
= find_openstateowner_str(strhashval
, open
);
2402 open
->op_stateowner
= sop
;
2404 /* Make sure the client's lease hasn't expired. */
2405 clp
= find_confirmed_client(clientid
);
2407 return nfserr_expired
;
2410 /* When sessions are used, skip open sequenceid processing */
2411 if (nfsd4_has_session(cstate
))
2413 if (!sop
->so_confirmed
) {
2414 /* Replace unconfirmed owners without checking for replay. */
2415 clp
= sop
->so_client
;
2416 release_openowner(sop
);
2417 open
->op_stateowner
= NULL
;
2420 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2421 if (sop
->so_replay
.rp_buflen
)
2422 return nfserr_replay_me
;
2423 /* The original OPEN failed so spectacularly
2424 * that we don't even have replay data saved!
2425 * Therefore, we have no choice but to continue
2426 * processing this OPEN; presumably, we'll
2427 * fail again for the same reason.
2429 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2432 if (open
->op_seqid
!= sop
->so_seqid
)
2433 return nfserr_bad_seqid
;
2435 if (open
->op_stateowner
== NULL
) {
2436 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2438 return nfserr_resource
;
2439 open
->op_stateowner
= sop
;
2441 list_del_init(&sop
->so_close_lru
);
2442 renew_client(sop
->so_client
);
2446 static inline __be32
2447 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2449 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2450 return nfserr_openmode
;
2455 static struct nfs4_delegation
*
2456 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2458 struct nfs4_delegation
*dp
;
2460 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
2461 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
2467 int share_access_to_flags(u32 share_access
)
2469 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2471 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2475 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2476 struct nfs4_delegation
**dp
)
2479 __be32 status
= nfserr_bad_stateid
;
2481 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2484 flags
= share_access_to_flags(open
->op_share_access
);
2485 status
= nfs4_check_delegmode(*dp
, flags
);
2489 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2493 open
->op_stateowner
->so_confirmed
= 1;
2498 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2500 struct nfs4_stateid
*local
;
2501 __be32 status
= nfserr_share_denied
;
2502 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2504 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2505 /* ignore lock owners */
2506 if (local
->st_stateowner
->so_is_open_owner
== 0)
2508 /* remember if we have seen this open owner */
2509 if (local
->st_stateowner
== sop
)
2511 /* check for conflicting share reservations */
2512 if (!test_share(local
, open
))
2520 static inline struct nfs4_stateid
*
2521 nfs4_alloc_stateid(void)
2523 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2526 static inline int nfs4_access_to_access(u32 nfs4_access
)
2530 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2531 flags
|= NFSD_MAY_READ
;
2532 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2533 flags
|= NFSD_MAY_WRITE
;
2537 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
2538 *fp
, struct svc_fh
*cur_fh
, u32 nfs4_access
)
2541 int oflag
= nfs4_access_to_omode(nfs4_access
);
2542 int access
= nfs4_access_to_access(nfs4_access
);
2544 if (!fp
->fi_fds
[oflag
]) {
2545 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2546 &fp
->fi_fds
[oflag
]);
2550 nfs4_file_get_access(fp
, oflag
);
2556 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2557 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2558 struct nfsd4_open
*open
)
2560 struct nfs4_stateid
*stp
;
2563 stp
= nfs4_alloc_stateid();
2565 return nfserr_resource
;
2567 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
->op_share_access
);
2569 kmem_cache_free(stateid_slab
, stp
);
2576 static inline __be32
2577 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2578 struct nfsd4_open
*open
)
2580 struct iattr iattr
= {
2581 .ia_valid
= ATTR_SIZE
,
2584 if (!open
->op_truncate
)
2586 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2587 return nfserr_inval
;
2588 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2592 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2594 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2598 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2600 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, op_share_access
);
2604 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2607 int oflag
= nfs4_access_to_omode(new_access
);
2608 nfs4_file_put_access(fp
, oflag
);
2612 /* remember the open */
2613 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2614 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2621 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2623 open
->op_stateowner
->so_confirmed
= 1;
2624 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2627 /* Should we give out recallable state?: */
2628 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2630 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2633 * In the sessions case, since we don't have to establish a
2634 * separate connection for callbacks, we assume it's OK
2635 * until we hear otherwise:
2637 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2640 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2642 struct file_lock
*fl
;
2644 fl
= locks_alloc_lock();
2647 locks_init_lock(fl
);
2648 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2649 fl
->fl_flags
= FL_LEASE
;
2650 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2651 fl
->fl_end
= OFFSET_MAX
;
2652 fl
->fl_owner
= (fl_owner_t
)dp
;
2653 fl
->fl_file
= dp
->dl_vfs_file
;
2654 BUG_ON(!fl
->fl_file
);
2655 fl
->fl_pid
= current
->tgid
;
2660 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2662 struct file_lock
*fl
;
2665 fl
= nfs4_alloc_init_lease(dp
, flag
);
2668 status
= vfs_setlease(dp
->dl_vfs_file
, fl
->fl_type
, &fl
);
2670 dp
->dl_flock
= NULL
;
2671 locks_free_lock(fl
);
2678 * Attempt to hand out a delegation.
2681 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2683 struct nfs4_delegation
*dp
;
2684 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2686 int status
, flag
= 0;
2688 cb_up
= nfsd4_cb_channel_good(sop
->so_client
);
2689 flag
= NFS4_OPEN_DELEGATE_NONE
;
2690 open
->op_recall
= 0;
2691 switch (open
->op_claim_type
) {
2692 case NFS4_OPEN_CLAIM_PREVIOUS
:
2694 open
->op_recall
= 1;
2695 flag
= open
->op_delegate_type
;
2696 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2699 case NFS4_OPEN_CLAIM_NULL
:
2700 /* Let's not give out any delegations till everyone's
2701 * had the chance to reclaim theirs.... */
2702 if (locks_in_grace())
2704 if (!cb_up
|| !sop
->so_confirmed
)
2706 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2707 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2709 flag
= NFS4_OPEN_DELEGATE_READ
;
2715 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2718 status
= nfs4_setlease(dp
, flag
);
2722 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2724 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2725 STATEID_VAL(&dp
->dl_stateid
));
2727 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2728 && flag
== NFS4_OPEN_DELEGATE_NONE
2729 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2730 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2731 open
->op_delegate_type
= flag
;
2734 unhash_delegation(dp
);
2736 flag
= NFS4_OPEN_DELEGATE_NONE
;
2741 * called with nfs4_lock_state() held.
2744 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2746 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2747 struct nfs4_file
*fp
= NULL
;
2748 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2749 struct nfs4_stateid
*stp
= NULL
;
2750 struct nfs4_delegation
*dp
= NULL
;
2753 status
= nfserr_inval
;
2754 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2755 || !deny_valid(open
->op_share_deny
))
2758 * Lookup file; if found, lookup stateid and check open request,
2759 * and check for delegations in the process of being recalled.
2760 * If not found, create the nfs4_file struct
2762 fp
= find_file(ino
);
2764 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2766 status
= nfs4_check_deleg(fp
, open
, &dp
);
2770 status
= nfserr_bad_stateid
;
2771 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2773 status
= nfserr_resource
;
2774 fp
= alloc_init_file(ino
);
2780 * OPEN the file, or upgrade an existing OPEN.
2781 * If truncate fails, the OPEN fails.
2784 /* Stateid was found, this is an OPEN upgrade */
2785 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2788 update_stateid(&stp
->st_stateid
);
2790 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2793 init_stateid(stp
, fp
, open
);
2794 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2796 release_open_stateid(stp
);
2799 if (nfsd4_has_session(&resp
->cstate
))
2800 update_stateid(&stp
->st_stateid
);
2802 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2804 if (nfsd4_has_session(&resp
->cstate
))
2805 open
->op_stateowner
->so_confirmed
= 1;
2808 * Attempt to hand out a delegation. No error return, because the
2809 * OPEN succeeds even if we fail.
2811 nfs4_open_delegation(current_fh
, open
, stp
);
2815 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2816 STATEID_VAL(&stp
->st_stateid
));
2820 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2821 nfs4_set_claim_prev(open
);
2823 * To finish the open response, we just need to set the rflags.
2825 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2826 if (!open
->op_stateowner
->so_confirmed
&&
2827 !nfsd4_has_session(&resp
->cstate
))
2828 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2834 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2837 struct nfs4_client
*clp
;
2841 dprintk("process_renew(%08x/%08x): starting\n",
2842 clid
->cl_boot
, clid
->cl_id
);
2843 status
= nfserr_stale_clientid
;
2844 if (STALE_CLIENTID(clid
))
2846 clp
= find_confirmed_client(clid
);
2847 status
= nfserr_expired
;
2849 /* We assume the client took too long to RENEW. */
2850 dprintk("nfsd4_renew: clientid not found!\n");
2854 status
= nfserr_cb_path_down
;
2855 if (!list_empty(&clp
->cl_delegations
)
2856 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2860 nfs4_unlock_state();
2864 struct lock_manager nfsd4_manager
= {
2868 nfsd4_end_grace(void)
2870 dprintk("NFSD: end of grace period\n");
2871 nfsd4_recdir_purge_old();
2872 locks_end_grace(&nfsd4_manager
);
2874 * Now that every NFSv4 client has had the chance to recover and
2875 * to see the (possibly new, possibly shorter) lease time, we
2876 * can safely set the next grace time to the current lease time:
2878 nfsd4_grace
= nfsd4_lease
;
2882 nfs4_laundromat(void)
2884 struct nfs4_client
*clp
;
2885 struct nfs4_stateowner
*sop
;
2886 struct nfs4_delegation
*dp
;
2887 struct list_head
*pos
, *next
, reaplist
;
2888 time_t cutoff
= get_seconds() - nfsd4_lease
;
2889 time_t t
, clientid_val
= nfsd4_lease
;
2890 time_t u
, test_val
= nfsd4_lease
;
2894 dprintk("NFSD: laundromat service - starting\n");
2895 if (locks_in_grace())
2897 INIT_LIST_HEAD(&reaplist
);
2898 spin_lock(&client_lock
);
2899 list_for_each_safe(pos
, next
, &client_lru
) {
2900 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2901 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
2902 t
= clp
->cl_time
- cutoff
;
2903 if (clientid_val
> t
)
2907 if (atomic_read(&clp
->cl_refcount
)) {
2908 dprintk("NFSD: client in use (clientid %08x)\n",
2909 clp
->cl_clientid
.cl_id
);
2912 unhash_client_locked(clp
);
2913 list_add(&clp
->cl_lru
, &reaplist
);
2915 spin_unlock(&client_lock
);
2916 list_for_each_safe(pos
, next
, &reaplist
) {
2917 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2918 dprintk("NFSD: purging unused client (clientid %08x)\n",
2919 clp
->cl_clientid
.cl_id
);
2920 nfsd4_remove_clid_dir(clp
);
2923 spin_lock(&recall_lock
);
2924 list_for_each_safe(pos
, next
, &del_recall_lru
) {
2925 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2926 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
2927 u
= dp
->dl_time
- cutoff
;
2932 list_move(&dp
->dl_recall_lru
, &reaplist
);
2934 spin_unlock(&recall_lock
);
2935 list_for_each_safe(pos
, next
, &reaplist
) {
2936 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2937 list_del_init(&dp
->dl_recall_lru
);
2938 unhash_delegation(dp
);
2940 test_val
= nfsd4_lease
;
2941 list_for_each_safe(pos
, next
, &close_lru
) {
2942 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
2943 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
2944 u
= sop
->so_time
- cutoff
;
2949 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2951 release_openowner(sop
);
2953 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
2954 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
2955 nfs4_unlock_state();
2956 return clientid_val
;
2959 static struct workqueue_struct
*laundry_wq
;
2960 static void laundromat_main(struct work_struct
*);
2961 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
2964 laundromat_main(struct work_struct
*not_used
)
2968 t
= nfs4_laundromat();
2969 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2970 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2973 static struct nfs4_stateowner
*
2974 search_close_lru(u32 st_id
, int flags
)
2976 struct nfs4_stateowner
*local
= NULL
;
2978 if (flags
& CLOSE_STATE
) {
2979 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
2980 if (local
->so_id
== st_id
)
2988 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2990 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
2994 STALE_STATEID(stateid_t
*stateid
)
2996 if (stateid
->si_boot
== boot_time
)
2998 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
2999 STATEID_VAL(stateid
));
3004 access_permit_read(unsigned long access_bmap
)
3006 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3007 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3008 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3012 access_permit_write(unsigned long access_bmap
)
3014 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3015 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3019 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
3021 __be32 status
= nfserr_openmode
;
3023 /* For lock stateid's, we test the parent open, not the lock: */
3024 if (stp
->st_openstp
)
3025 stp
= stp
->st_openstp
;
3026 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3028 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3035 static inline __be32
3036 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3038 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3040 else if (locks_in_grace()) {
3041 /* Answer in remaining cases depends on existance of
3042 * conflicting state; so we must wait out the grace period. */
3043 return nfserr_grace
;
3044 } else if (flags
& WR_STATE
)
3045 return nfs4_share_conflict(current_fh
,
3046 NFS4_SHARE_DENY_WRITE
);
3047 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3048 return nfs4_share_conflict(current_fh
,
3049 NFS4_SHARE_DENY_READ
);
3053 * Allow READ/WRITE during grace period on recovered state only for files
3054 * that are not able to provide mandatory locking.
3057 grace_disallows_io(struct inode
*inode
)
3059 return locks_in_grace() && mandatory_lock(inode
);
3062 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, int flags
)
3065 * When sessions are used the stateid generation number is ignored
3068 if ((flags
& HAS_SESSION
) && in
->si_generation
== 0)
3071 /* If the client sends us a stateid from the future, it's buggy: */
3072 if (in
->si_generation
> ref
->si_generation
)
3073 return nfserr_bad_stateid
;
3075 * The following, however, can happen. For example, if the
3076 * client sends an open and some IO at the same time, the open
3077 * may bump si_generation while the IO is still in flight.
3078 * Thanks to hard links and renames, the client never knows what
3079 * file an open will affect. So it could avoid that situation
3080 * only by serializing all opens and IO from the same open
3081 * owner. To recover from the old_stateid error, the client
3082 * will just have to retry the IO:
3084 if (in
->si_generation
< ref
->si_generation
)
3085 return nfserr_old_stateid
;
3090 static int is_delegation_stateid(stateid_t
*stateid
)
3092 return stateid
->si_fileid
== 0;
3096 * Checks for stateid operations
3099 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3100 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3102 struct nfs4_stateid
*stp
= NULL
;
3103 struct nfs4_delegation
*dp
= NULL
;
3104 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3105 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3111 if (grace_disallows_io(ino
))
3112 return nfserr_grace
;
3114 if (nfsd4_has_session(cstate
))
3115 flags
|= HAS_SESSION
;
3117 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3118 return check_special_stateids(current_fh
, stateid
, flags
);
3120 status
= nfserr_stale_stateid
;
3121 if (STALE_STATEID(stateid
))
3125 * We assume that any stateid that has the current boot time,
3126 * but that we can't find, is expired:
3128 status
= nfserr_expired
;
3129 if (is_delegation_stateid(stateid
)) {
3130 dp
= find_delegation_stateid(ino
, stateid
);
3133 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
,
3137 status
= nfs4_check_delegmode(dp
, flags
);
3140 renew_client(dp
->dl_client
);
3142 *filpp
= find_readable_file(dp
->dl_file
);
3145 } else { /* open or lock stateid */
3146 stp
= find_stateid(stateid
, flags
);
3149 status
= nfserr_bad_stateid
;
3150 if (nfs4_check_fh(current_fh
, stp
))
3152 if (!stp
->st_stateowner
->so_confirmed
)
3154 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3158 status
= nfs4_check_openmode(stp
, flags
);
3161 renew_client(stp
->st_stateowner
->so_client
);
3163 if (flags
& RD_STATE
)
3164 *filpp
= find_readable_file(stp
->st_file
);
3166 *filpp
= find_writeable_file(stp
->st_file
);
3177 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3178 RD_STATE
: WR_STATE
;
3182 * Checks for sequence id mutating operations.
3185 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3186 stateid_t
*stateid
, int flags
,
3187 struct nfs4_stateowner
**sopp
,
3188 struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
3190 struct nfs4_stateid
*stp
;
3191 struct nfs4_stateowner
*sop
;
3192 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3195 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3196 seqid
, STATEID_VAL(stateid
));
3201 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
3202 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
3203 return nfserr_bad_stateid
;
3206 if (STALE_STATEID(stateid
))
3207 return nfserr_stale_stateid
;
3209 if (nfsd4_has_session(cstate
))
3210 flags
|= HAS_SESSION
;
3213 * We return BAD_STATEID if filehandle doesn't match stateid,
3214 * the confirmed flag is incorrecly set, or the generation
3215 * number is incorrect.
3217 stp
= find_stateid(stateid
, flags
);
3220 * Also, we should make sure this isn't just the result of
3223 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
3224 /* It's not stale; let's assume it's expired: */
3226 return nfserr_expired
;
3232 *sopp
= sop
= stp
->st_stateowner
;
3235 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
3236 struct nfs4_client
*clp
= sop
->so_client
;
3240 lkflg
= setlkflg(lock
->lk_type
);
3242 if (lock
->lk_is_new
) {
3243 if (!sop
->so_is_open_owner
)
3244 return nfserr_bad_stateid
;
3245 if (!(flags
& HAS_SESSION
) &&
3246 !same_clid(&clp
->cl_clientid
, lockclid
))
3247 return nfserr_bad_stateid
;
3248 /* stp is the open stateid */
3249 status
= nfs4_check_openmode(stp
, lkflg
);
3253 /* stp is the lock stateid */
3254 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
3260 if (nfs4_check_fh(current_fh
, stp
)) {
3261 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3262 return nfserr_bad_stateid
;
3266 * We now validate the seqid and stateid generation numbers.
3267 * For the moment, we ignore the possibility of
3268 * generation number wraparound.
3270 if (!(flags
& HAS_SESSION
) && seqid
!= sop
->so_seqid
)
3273 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
3274 dprintk("NFSD: preprocess_seqid_op: expected"
3275 " unconfirmed stateowner!\n");
3276 return nfserr_bad_stateid
;
3278 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
3279 dprintk("NFSD: preprocess_seqid_op: stateowner not"
3280 " confirmed yet!\n");
3281 return nfserr_bad_stateid
;
3283 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, flags
);
3286 renew_client(sop
->so_client
);
3290 if (seqid
== sop
->so_seqid
- 1) {
3291 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
3292 /* indicate replay to calling function */
3293 return nfserr_replay_me
;
3295 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
3296 sop
->so_seqid
, seqid
);
3298 return nfserr_bad_seqid
;
3302 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3303 struct nfsd4_open_confirm
*oc
)
3306 struct nfs4_stateowner
*sop
;
3307 struct nfs4_stateid
*stp
;
3309 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3310 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3311 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3313 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3319 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3320 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3321 CONFIRM
| OPEN_STATE
,
3322 &oc
->oc_stateowner
, &stp
, NULL
)))
3325 sop
= oc
->oc_stateowner
;
3326 sop
->so_confirmed
= 1;
3327 update_stateid(&stp
->st_stateid
);
3328 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3329 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3330 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3332 nfsd4_create_clid_dir(sop
->so_client
);
3334 if (oc
->oc_stateowner
) {
3335 nfs4_get_stateowner(oc
->oc_stateowner
);
3336 cstate
->replay_owner
= oc
->oc_stateowner
;
3338 nfs4_unlock_state();
3344 * unset all bits in union bitmap (bmap) that
3345 * do not exist in share (from successful OPEN_DOWNGRADE)
3348 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
3351 for (i
= 1; i
< 4; i
++) {
3352 if ((i
& access
) != i
)
3353 __clear_bit(i
, bmap
);
3358 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3361 for (i
= 0; i
< 4; i
++) {
3362 if ((i
& deny
) != i
)
3363 __clear_bit(i
, bmap
);
3368 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3369 struct nfsd4_compound_state
*cstate
,
3370 struct nfsd4_open_downgrade
*od
)
3373 struct nfs4_stateid
*stp
;
3374 unsigned int share_access
;
3376 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3377 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3378 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3380 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3381 || !deny_valid(od
->od_share_deny
))
3382 return nfserr_inval
;
3385 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3389 &od
->od_stateowner
, &stp
, NULL
)))
3392 status
= nfserr_inval
;
3393 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3394 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3395 stp
->st_access_bmap
, od
->od_share_access
);
3398 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3399 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3400 stp
->st_deny_bmap
, od
->od_share_deny
);
3403 set_access(&share_access
, stp
->st_access_bmap
);
3404 nfs4_file_downgrade(stp
->st_file
, share_access
& ~od
->od_share_access
);
3406 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
3407 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3409 update_stateid(&stp
->st_stateid
);
3410 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3413 if (od
->od_stateowner
) {
3414 nfs4_get_stateowner(od
->od_stateowner
);
3415 cstate
->replay_owner
= od
->od_stateowner
;
3417 nfs4_unlock_state();
3422 * nfs4_unlock_state() called after encode
3425 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3426 struct nfsd4_close
*close
)
3429 struct nfs4_stateid
*stp
;
3431 dprintk("NFSD: nfsd4_close on file %.*s\n",
3432 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3433 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3436 /* check close_lru for replay */
3437 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3440 OPEN_STATE
| CLOSE_STATE
,
3441 &close
->cl_stateowner
, &stp
, NULL
)))
3444 update_stateid(&stp
->st_stateid
);
3445 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3447 /* release_stateid() calls nfsd_close() if needed */
3448 release_open_stateid(stp
);
3450 /* place unused nfs4_stateowners on so_close_lru list to be
3451 * released by the laundromat service after the lease period
3452 * to enable us to handle CLOSE replay
3454 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3455 move_to_close_lru(close
->cl_stateowner
);
3457 if (close
->cl_stateowner
) {
3458 nfs4_get_stateowner(close
->cl_stateowner
);
3459 cstate
->replay_owner
= close
->cl_stateowner
;
3461 nfs4_unlock_state();
3466 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3467 struct nfsd4_delegreturn
*dr
)
3469 struct nfs4_delegation
*dp
;
3470 stateid_t
*stateid
= &dr
->dr_stateid
;
3471 struct inode
*inode
;
3475 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3477 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3479 if (nfsd4_has_session(cstate
))
3480 flags
|= HAS_SESSION
;
3482 status
= nfserr_bad_stateid
;
3483 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3485 status
= nfserr_stale_stateid
;
3486 if (STALE_STATEID(stateid
))
3488 status
= nfserr_bad_stateid
;
3489 if (!is_delegation_stateid(stateid
))
3491 status
= nfserr_expired
;
3492 dp
= find_delegation_stateid(inode
, stateid
);
3495 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, flags
);
3498 renew_client(dp
->dl_client
);
3500 unhash_delegation(dp
);
3502 nfs4_unlock_state();
3509 * Lock owner state (byte-range locks)
3511 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3512 #define LOCK_HASH_BITS 8
3513 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3514 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3517 end_offset(u64 start
, u64 len
)
3522 return end
>= start
? end
: NFS4_MAX_UINT64
;
3525 /* last octet in a range */
3527 last_byte_offset(u64 start
, u64 len
)
3533 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3536 #define lockownerid_hashval(id) \
3537 ((id) & LOCK_HASH_MASK)
3539 static inline unsigned int
3540 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3541 struct xdr_netobj
*ownername
)
3543 return (file_hashval(inode
) + cl_id
3544 + opaque_hashval(ownername
->data
, ownername
->len
))
3548 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3549 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3550 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3552 static struct nfs4_stateid
*
3553 find_stateid(stateid_t
*stid
, int flags
)
3555 struct nfs4_stateid
*local
;
3556 u32 st_id
= stid
->si_stateownerid
;
3557 u32 f_id
= stid
->si_fileid
;
3558 unsigned int hashval
;
3560 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3561 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3562 hashval
= stateid_hashval(st_id
, f_id
);
3563 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3564 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3565 (local
->st_stateid
.si_fileid
== f_id
))
3570 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3571 hashval
= stateid_hashval(st_id
, f_id
);
3572 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3573 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3574 (local
->st_stateid
.si_fileid
== f_id
))
3581 static struct nfs4_delegation
*
3582 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3584 struct nfs4_file
*fp
;
3585 struct nfs4_delegation
*dl
;
3587 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3590 fp
= find_file(ino
);
3593 dl
= find_delegation_file(fp
, stid
);
3599 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3600 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3601 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3602 * locking, this prevents us from being completely protocol-compliant. The
3603 * real solution to this problem is to start using unsigned file offsets in
3604 * the VFS, but this is a very deep change!
3607 nfs4_transform_lock_offset(struct file_lock
*lock
)
3609 if (lock
->fl_start
< 0)
3610 lock
->fl_start
= OFFSET_MAX
;
3611 if (lock
->fl_end
< 0)
3612 lock
->fl_end
= OFFSET_MAX
;
3615 /* Hack!: For now, we're defining this just so we can use a pointer to it
3616 * as a unique cookie to identify our (NFSv4's) posix locks. */
3617 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3621 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3623 struct nfs4_stateowner
*sop
;
3625 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3626 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3627 kref_get(&sop
->so_ref
);
3629 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3631 deny
->ld_sop
= NULL
;
3632 deny
->ld_clientid
.cl_boot
= 0;
3633 deny
->ld_clientid
.cl_id
= 0;
3635 deny
->ld_start
= fl
->fl_start
;
3636 deny
->ld_length
= NFS4_MAX_UINT64
;
3637 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3638 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3639 deny
->ld_type
= NFS4_READ_LT
;
3640 if (fl
->fl_type
!= F_RDLCK
)
3641 deny
->ld_type
= NFS4_WRITE_LT
;
3644 static struct nfs4_stateowner
*
3645 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3646 struct xdr_netobj
*owner
)
3648 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3649 struct nfs4_stateowner
*op
;
3651 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3652 if (same_owner_str(op
, owner
, clid
))
3659 * Alloc a lock owner structure.
3660 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3663 * strhashval = lock_ownerstr_hashval
3666 static struct nfs4_stateowner
*
3667 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3668 struct nfs4_stateowner
*sop
;
3669 struct nfs4_replay
*rp
;
3670 unsigned int idhashval
;
3672 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
3674 idhashval
= lockownerid_hashval(current_ownerid
);
3675 INIT_LIST_HEAD(&sop
->so_idhash
);
3676 INIT_LIST_HEAD(&sop
->so_strhash
);
3677 INIT_LIST_HEAD(&sop
->so_perclient
);
3678 INIT_LIST_HEAD(&sop
->so_stateids
);
3679 INIT_LIST_HEAD(&sop
->so_perstateid
);
3680 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
3682 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3683 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3684 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3685 sop
->so_is_open_owner
= 0;
3686 sop
->so_id
= current_ownerid
++;
3687 sop
->so_client
= clp
;
3688 /* It is the openowner seqid that will be incremented in encode in the
3689 * case of new lockowners; so increment the lock seqid manually: */
3690 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3691 sop
->so_confirmed
= 1;
3692 rp
= &sop
->so_replay
;
3693 rp
->rp_status
= nfserr_serverfault
;
3695 rp
->rp_buf
= rp
->rp_ibuf
;
3699 static struct nfs4_stateid
*
3700 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3702 struct nfs4_stateid
*stp
;
3703 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3705 stp
= nfs4_alloc_stateid();
3708 INIT_LIST_HEAD(&stp
->st_hash
);
3709 INIT_LIST_HEAD(&stp
->st_perfile
);
3710 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3711 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3712 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3713 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3714 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3715 stp
->st_stateowner
= sop
;
3718 stp
->st_stateid
.si_boot
= boot_time
;
3719 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3720 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3721 stp
->st_stateid
.si_generation
= 0;
3722 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3723 stp
->st_openstp
= open_stp
;
3730 check_lock_length(u64 offset
, u64 length
)
3732 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3733 LOFF_OVERFLOW(offset
, length
)));
3740 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3741 struct nfsd4_lock
*lock
)
3743 struct nfs4_stateowner
*open_sop
= NULL
;
3744 struct nfs4_stateowner
*lock_sop
= NULL
;
3745 struct nfs4_stateid
*lock_stp
;
3746 struct nfs4_file
*fp
;
3747 struct file
*filp
= NULL
;
3748 struct file_lock file_lock
;
3749 struct file_lock conflock
;
3751 unsigned int strhashval
;
3755 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3756 (long long) lock
->lk_offset
,
3757 (long long) lock
->lk_length
);
3759 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3760 return nfserr_inval
;
3762 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3763 S_IFREG
, NFSD_MAY_LOCK
))) {
3764 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3770 if (lock
->lk_is_new
) {
3772 * Client indicates that this is a new lockowner.
3773 * Use open owner and open stateid to create lock owner and
3776 struct nfs4_stateid
*open_stp
= NULL
;
3778 status
= nfserr_stale_clientid
;
3779 if (!nfsd4_has_session(cstate
) &&
3780 STALE_CLIENTID(&lock
->lk_new_clientid
))
3783 /* validate and update open stateid and open seqid */
3784 status
= nfs4_preprocess_seqid_op(cstate
,
3785 lock
->lk_new_open_seqid
,
3786 &lock
->lk_new_open_stateid
,
3788 &lock
->lk_replay_owner
, &open_stp
,
3792 open_sop
= lock
->lk_replay_owner
;
3793 /* create lockowner and lock stateid */
3794 fp
= open_stp
->st_file
;
3795 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3796 open_sop
->so_client
->cl_clientid
.cl_id
,
3797 &lock
->v
.new.owner
);
3798 /* XXX: Do we need to check for duplicate stateowners on
3799 * the same file, or should they just be allowed (and
3800 * create new stateids)? */
3801 status
= nfserr_resource
;
3802 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3803 open_sop
->so_client
, open_stp
, lock
);
3804 if (lock_sop
== NULL
)
3806 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3807 if (lock_stp
== NULL
)
3810 /* lock (lock owner + lock stateid) already exists */
3811 status
= nfs4_preprocess_seqid_op(cstate
,
3812 lock
->lk_old_lock_seqid
,
3813 &lock
->lk_old_lock_stateid
,
3815 &lock
->lk_replay_owner
, &lock_stp
, lock
);
3818 lock_sop
= lock
->lk_replay_owner
;
3819 fp
= lock_stp
->st_file
;
3821 /* lock->lk_replay_owner and lock_stp have been created or found */
3823 status
= nfserr_grace
;
3824 if (locks_in_grace() && !lock
->lk_reclaim
)
3826 status
= nfserr_no_grace
;
3827 if (!locks_in_grace() && lock
->lk_reclaim
)
3830 locks_init_lock(&file_lock
);
3831 switch (lock
->lk_type
) {
3834 if (find_readable_file(lock_stp
->st_file
)) {
3835 nfs4_get_vfs_file(rqstp
, fp
, &cstate
->current_fh
, NFS4_SHARE_ACCESS_READ
);
3836 filp
= find_readable_file(lock_stp
->st_file
);
3838 file_lock
.fl_type
= F_RDLCK
;
3842 case NFS4_WRITEW_LT
:
3843 if (find_writeable_file(lock_stp
->st_file
)) {
3844 nfs4_get_vfs_file(rqstp
, fp
, &cstate
->current_fh
, NFS4_SHARE_ACCESS_WRITE
);
3845 filp
= find_writeable_file(lock_stp
->st_file
);
3847 file_lock
.fl_type
= F_WRLCK
;
3851 status
= nfserr_inval
;
3855 status
= nfserr_openmode
;
3858 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3859 file_lock
.fl_pid
= current
->tgid
;
3860 file_lock
.fl_file
= filp
;
3861 file_lock
.fl_flags
= FL_POSIX
;
3862 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3864 file_lock
.fl_start
= lock
->lk_offset
;
3865 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3866 nfs4_transform_lock_offset(&file_lock
);
3869 * Try to lock the file in the VFS.
3870 * Note: locks.c uses the BKL to protect the inode's lock list.
3873 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
3875 case 0: /* success! */
3876 update_stateid(&lock_stp
->st_stateid
);
3877 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
3881 case (EAGAIN
): /* conflock holds conflicting lock */
3882 status
= nfserr_denied
;
3883 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3884 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3887 status
= nfserr_deadlock
;
3890 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3891 status
= nfserr_resource
;
3895 if (status
&& lock
->lk_is_new
&& lock_sop
)
3896 release_lockowner(lock_sop
);
3897 if (lock
->lk_replay_owner
) {
3898 nfs4_get_stateowner(lock
->lk_replay_owner
);
3899 cstate
->replay_owner
= lock
->lk_replay_owner
;
3901 nfs4_unlock_state();
3906 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3907 * so we do a temporary open here just to get an open file to pass to
3908 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3911 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
3916 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
3919 err
= vfs_test_lock(file
, lock
);
3928 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3929 struct nfsd4_lockt
*lockt
)
3931 struct inode
*inode
;
3932 struct file_lock file_lock
;
3936 if (locks_in_grace())
3937 return nfserr_grace
;
3939 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
3940 return nfserr_inval
;
3942 lockt
->lt_stateowner
= NULL
;
3945 status
= nfserr_stale_clientid
;
3946 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
3949 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
3950 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
3951 if (status
== nfserr_symlink
)
3952 status
= nfserr_inval
;
3956 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3957 locks_init_lock(&file_lock
);
3958 switch (lockt
->lt_type
) {
3961 file_lock
.fl_type
= F_RDLCK
;
3964 case NFS4_WRITEW_LT
:
3965 file_lock
.fl_type
= F_WRLCK
;
3968 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
3969 status
= nfserr_inval
;
3973 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
3974 &lockt
->lt_clientid
, &lockt
->lt_owner
);
3975 if (lockt
->lt_stateowner
)
3976 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
3977 file_lock
.fl_pid
= current
->tgid
;
3978 file_lock
.fl_flags
= FL_POSIX
;
3980 file_lock
.fl_start
= lockt
->lt_offset
;
3981 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
3983 nfs4_transform_lock_offset(&file_lock
);
3986 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
3988 status
= nfserrno(error
);
3991 if (file_lock
.fl_type
!= F_UNLCK
) {
3992 status
= nfserr_denied
;
3993 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
3996 nfs4_unlock_state();
4001 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4002 struct nfsd4_locku
*locku
)
4004 struct nfs4_stateid
*stp
;
4005 struct file
*filp
= NULL
;
4006 struct file_lock file_lock
;
4010 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4011 (long long) locku
->lu_offset
,
4012 (long long) locku
->lu_length
);
4014 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4015 return nfserr_inval
;
4019 if ((status
= nfs4_preprocess_seqid_op(cstate
,
4023 &locku
->lu_stateowner
, &stp
, NULL
)))
4026 filp
= find_any_file(stp
->st_file
);
4028 status
= nfserr_lock_range
;
4032 locks_init_lock(&file_lock
);
4033 file_lock
.fl_type
= F_UNLCK
;
4034 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
4035 file_lock
.fl_pid
= current
->tgid
;
4036 file_lock
.fl_file
= filp
;
4037 file_lock
.fl_flags
= FL_POSIX
;
4038 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4039 file_lock
.fl_start
= locku
->lu_offset
;
4041 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4042 nfs4_transform_lock_offset(&file_lock
);
4045 * Try to unlock the file in the VFS.
4047 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4049 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4053 * OK, unlock succeeded; the only thing left to do is update the stateid.
4055 update_stateid(&stp
->st_stateid
);
4056 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
4059 if (locku
->lu_stateowner
) {
4060 nfs4_get_stateowner(locku
->lu_stateowner
);
4061 cstate
->replay_owner
= locku
->lu_stateowner
;
4063 nfs4_unlock_state();
4067 status
= nfserrno(err
);
4073 * 1: locks held by lockowner
4074 * 0: no locks held by lockowner
4077 check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
)
4079 struct file_lock
**flpp
;
4080 struct inode
*inode
= filp
->fi_inode
;
4084 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4085 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4096 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4097 struct nfsd4_compound_state
*cstate
,
4098 struct nfsd4_release_lockowner
*rlockowner
)
4100 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4101 struct nfs4_stateowner
*sop
;
4102 struct nfs4_stateid
*stp
;
4103 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4104 struct list_head matches
;
4108 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4109 clid
->cl_boot
, clid
->cl_id
);
4111 /* XXX check for lease expiration */
4113 status
= nfserr_stale_clientid
;
4114 if (STALE_CLIENTID(clid
))
4119 status
= nfserr_locks_held
;
4120 /* XXX: we're doing a linear search through all the lockowners.
4121 * Yipes! For now we'll just hope clients aren't really using
4122 * release_lockowner much, but eventually we have to fix these
4123 * data structures. */
4124 INIT_LIST_HEAD(&matches
);
4125 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4126 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4127 if (!same_owner_str(sop
, owner
, clid
))
4129 list_for_each_entry(stp
, &sop
->so_stateids
,
4131 if (check_for_locks(stp
->st_file
, sop
))
4133 /* Note: so_perclient unused for lockowners,
4134 * so it's OK to fool with here. */
4135 list_add(&sop
->so_perclient
, &matches
);
4139 /* Clients probably won't expect us to return with some (but not all)
4140 * of the lockowner state released; so don't release any until all
4141 * have been checked. */
4143 while (!list_empty(&matches
)) {
4144 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
4146 /* unhash_stateowner deletes so_perclient only
4147 * for openowners. */
4148 list_del(&sop
->so_perclient
);
4149 release_lockowner(sop
);
4152 nfs4_unlock_state();
4156 static inline struct nfs4_client_reclaim
*
4159 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4163 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4165 unsigned int strhashval
= clientstr_hashval(name
);
4166 struct nfs4_client
*clp
;
4168 clp
= find_confirmed_client_by_str(name
, strhashval
);
4173 * failure => all reset bets are off, nfserr_no_grace...
4176 nfs4_client_to_reclaim(const char *name
)
4178 unsigned int strhashval
;
4179 struct nfs4_client_reclaim
*crp
= NULL
;
4181 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4182 crp
= alloc_reclaim();
4185 strhashval
= clientstr_hashval(name
);
4186 INIT_LIST_HEAD(&crp
->cr_strhash
);
4187 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4188 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4189 reclaim_str_hashtbl_size
++;
4194 nfs4_release_reclaim(void)
4196 struct nfs4_client_reclaim
*crp
= NULL
;
4199 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4200 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4201 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4202 struct nfs4_client_reclaim
, cr_strhash
);
4203 list_del(&crp
->cr_strhash
);
4205 reclaim_str_hashtbl_size
--;
4208 BUG_ON(reclaim_str_hashtbl_size
);
4212 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4213 static struct nfs4_client_reclaim
*
4214 nfs4_find_reclaim_client(clientid_t
*clid
)
4216 unsigned int strhashval
;
4217 struct nfs4_client
*clp
;
4218 struct nfs4_client_reclaim
*crp
= NULL
;
4221 /* find clientid in conf_id_hashtbl */
4222 clp
= find_confirmed_client(clid
);
4226 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4227 clp
->cl_name
.len
, clp
->cl_name
.data
,
4230 /* find clp->cl_name in reclaim_str_hashtbl */
4231 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4232 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4233 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4241 * Called from OPEN. Look for clientid in reclaim list.
4244 nfs4_check_open_reclaim(clientid_t
*clid
)
4246 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4249 /* initialization to perform at module load time: */
4252 nfs4_state_init(void)
4256 status
= nfsd4_init_slabs();
4259 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4260 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4261 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4262 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4263 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4264 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4266 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4267 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4268 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4269 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4271 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4272 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4273 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
4275 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
4276 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4277 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
4279 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4280 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4281 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4283 memset(&onestateid
, ~0, sizeof(stateid_t
));
4284 INIT_LIST_HEAD(&close_lru
);
4285 INIT_LIST_HEAD(&client_lru
);
4286 INIT_LIST_HEAD(&del_recall_lru
);
4287 reclaim_str_hashtbl_size
= 0;
4292 nfsd4_load_reboot_recovery_data(void)
4297 nfsd4_init_recdir(user_recovery_dirname
);
4298 status
= nfsd4_recdir_load();
4299 nfs4_unlock_state();
4301 printk("NFSD: Failure reading reboot recovery data\n");
4305 * Since the lifetime of a delegation isn't limited to that of an open, a
4306 * client may quite reasonably hang on to a delegation as long as it has
4307 * the inode cached. This becomes an obvious problem the first time a
4308 * client's inode cache approaches the size of the server's total memory.
4310 * For now we avoid this problem by imposing a hard limit on the number
4311 * of delegations, which varies according to the server's memory size.
4314 set_max_delegations(void)
4317 * Allow at most 4 delegations per megabyte of RAM. Quick
4318 * estimates suggest that in the worst case (where every delegation
4319 * is for a different inode), a delegation could take about 1.5K,
4320 * giving a worst case usage of about 6% of memory.
4322 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4325 /* initialization to perform when the nfsd service is started: */
4328 __nfs4_state_start(void)
4332 boot_time
= get_seconds();
4333 locks_start_grace(&nfsd4_manager
);
4334 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4336 ret
= set_callback_cred();
4339 laundry_wq
= create_singlethread_workqueue("nfsd4");
4340 if (laundry_wq
== NULL
)
4342 ret
= nfsd4_create_callback_queue();
4344 goto out_free_laundry
;
4345 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4346 set_max_delegations();
4349 destroy_workqueue(laundry_wq
);
4354 nfs4_state_start(void)
4356 nfsd4_load_reboot_recovery_data();
4357 return __nfs4_state_start();
4361 __nfs4_state_shutdown(void)
4364 struct nfs4_client
*clp
= NULL
;
4365 struct nfs4_delegation
*dp
= NULL
;
4366 struct list_head
*pos
, *next
, reaplist
;
4368 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4369 while (!list_empty(&conf_id_hashtbl
[i
])) {
4370 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4373 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4374 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4378 INIT_LIST_HEAD(&reaplist
);
4379 spin_lock(&recall_lock
);
4380 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4381 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4382 list_move(&dp
->dl_recall_lru
, &reaplist
);
4384 spin_unlock(&recall_lock
);
4385 list_for_each_safe(pos
, next
, &reaplist
) {
4386 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4387 list_del_init(&dp
->dl_recall_lru
);
4388 unhash_delegation(dp
);
4391 nfsd4_shutdown_recdir();
4395 nfs4_state_shutdown(void)
4397 cancel_delayed_work_sync(&laundromat_work
);
4398 destroy_workqueue(laundry_wq
);
4399 locks_end_grace(&nfsd4_manager
);
4401 nfs4_release_reclaim();
4402 __nfs4_state_shutdown();
4403 nfs4_unlock_state();
4404 nfsd4_destroy_callback_queue();
4408 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4409 * accessed when nfsd is starting.
4412 nfs4_set_recdir(char *recdir
)
4414 strcpy(user_recovery_dirname
, recdir
);
4418 * Change the NFSv4 recovery directory to recdir.
4421 nfs4_reset_recoverydir(char *recdir
)
4426 status
= kern_path(recdir
, LOOKUP_FOLLOW
, &path
);
4430 if (S_ISDIR(path
.dentry
->d_inode
->i_mode
)) {
4431 nfs4_set_recdir(recdir
);
4439 nfs4_recoverydir(void)
4441 return user_recovery_dirname
;