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)
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
);
234 dp
->dl_stateid
.si_boot
= boot_time
;
235 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
236 dp
->dl_stateid
.si_fileid
= 0;
237 dp
->dl_stateid
.si_generation
= 0;
238 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
240 atomic_set(&dp
->dl_count
, 1);
241 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
246 nfs4_put_delegation(struct nfs4_delegation
*dp
)
248 if (atomic_dec_and_test(&dp
->dl_count
)) {
249 dprintk("NFSD: freeing dp %p\n",dp
);
250 put_nfs4_file(dp
->dl_file
);
251 kmem_cache_free(deleg_slab
, dp
);
256 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
258 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
259 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
261 fput(fp
->fi_deleg_file
);
262 fp
->fi_deleg_file
= NULL
;
266 /* Called under the state lock. */
268 unhash_delegation(struct nfs4_delegation
*dp
)
270 list_del_init(&dp
->dl_perclnt
);
271 spin_lock(&recall_lock
);
272 list_del_init(&dp
->dl_perfile
);
273 list_del_init(&dp
->dl_recall_lru
);
274 spin_unlock(&recall_lock
);
275 nfs4_put_deleg_lease(dp
->dl_file
);
276 nfs4_put_delegation(dp
);
283 /* client_lock protects the client lru list and session hash table */
284 static DEFINE_SPINLOCK(client_lock
);
286 /* Hash tables for nfs4_clientid state */
287 #define CLIENT_HASH_BITS 4
288 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
289 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
291 #define clientid_hashval(id) \
292 ((id) & CLIENT_HASH_MASK)
293 #define clientstr_hashval(name) \
294 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
296 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
297 * used in reboot/reset lease grace period processing
299 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
300 * setclientid_confirmed info.
302 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
305 * client_lru holds client queue ordered by nfs4_client.cl_time
308 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
309 * for last close replay.
311 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
312 static int reclaim_str_hashtbl_size
= 0;
313 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
314 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
315 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
316 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
317 static struct list_head client_lru
;
318 static struct list_head close_lru
;
321 * We store the NONE, READ, WRITE, and BOTH bits separately in the
322 * st_{access,deny}_bmap field of the stateid, in order to track not
323 * only what share bits are currently in force, but also what
324 * combinations of share bits previous opens have used. This allows us
325 * to enforce the recommendation of rfc 3530 14.2.19 that the server
326 * return an error if the client attempt to downgrade to a combination
327 * of share bits not explicable by closing some of its previous opens.
329 * XXX: This enforcement is actually incomplete, since we don't keep
330 * track of access/deny bit combinations; so, e.g., we allow:
332 * OPEN allow read, deny write
333 * OPEN allow both, deny none
334 * DOWNGRADE allow read, deny none
336 * which we should reject.
339 set_access(unsigned int *access
, unsigned long bmap
) {
343 for (i
= 1; i
< 4; i
++) {
344 if (test_bit(i
, &bmap
))
350 set_deny(unsigned int *deny
, unsigned long bmap
) {
354 for (i
= 0; i
< 4; i
++) {
355 if (test_bit(i
, &bmap
))
361 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
362 unsigned int access
, deny
;
364 set_access(&access
, stp
->st_access_bmap
);
365 set_deny(&deny
, stp
->st_deny_bmap
);
366 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
371 static int nfs4_access_to_omode(u32 access
)
373 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
374 case NFS4_SHARE_ACCESS_READ
:
376 case NFS4_SHARE_ACCESS_WRITE
:
378 case NFS4_SHARE_ACCESS_BOTH
:
384 static int nfs4_access_bmap_to_omode(struct nfs4_stateid
*stp
)
388 set_access(&access
, stp
->st_access_bmap
);
389 return nfs4_access_to_omode(access
);
392 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
394 list_del(&stp
->st_hash
);
395 list_del(&stp
->st_perfile
);
396 list_del(&stp
->st_perstateowner
);
399 static void free_generic_stateid(struct nfs4_stateid
*stp
)
403 if (stp
->st_access_bmap
) {
404 oflag
= nfs4_access_bmap_to_omode(stp
);
405 nfs4_file_put_access(stp
->st_file
, oflag
);
407 put_nfs4_file(stp
->st_file
);
408 kmem_cache_free(stateid_slab
, stp
);
411 static void release_lock_stateid(struct nfs4_stateid
*stp
)
415 unhash_generic_stateid(stp
);
416 file
= find_any_file(stp
->st_file
);
418 locks_remove_posix(file
, (fl_owner_t
)stp
->st_stateowner
);
419 free_generic_stateid(stp
);
422 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
424 struct nfs4_stateid
*stp
;
426 list_del(&sop
->so_idhash
);
427 list_del(&sop
->so_strhash
);
428 list_del(&sop
->so_perstateid
);
429 while (!list_empty(&sop
->so_stateids
)) {
430 stp
= list_first_entry(&sop
->so_stateids
,
431 struct nfs4_stateid
, st_perstateowner
);
432 release_lock_stateid(stp
);
436 static void release_lockowner(struct nfs4_stateowner
*sop
)
438 unhash_lockowner(sop
);
439 nfs4_put_stateowner(sop
);
443 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
445 struct nfs4_stateowner
*lock_sop
;
447 while (!list_empty(&open_stp
->st_lockowners
)) {
448 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
449 struct nfs4_stateowner
, so_perstateid
);
450 /* list_del(&open_stp->st_lockowners); */
451 BUG_ON(lock_sop
->so_is_open_owner
);
452 release_lockowner(lock_sop
);
456 static void release_open_stateid(struct nfs4_stateid
*stp
)
458 unhash_generic_stateid(stp
);
459 release_stateid_lockowners(stp
);
460 free_generic_stateid(stp
);
463 static void unhash_openowner(struct nfs4_stateowner
*sop
)
465 struct nfs4_stateid
*stp
;
467 list_del(&sop
->so_idhash
);
468 list_del(&sop
->so_strhash
);
469 list_del(&sop
->so_perclient
);
470 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
471 while (!list_empty(&sop
->so_stateids
)) {
472 stp
= list_first_entry(&sop
->so_stateids
,
473 struct nfs4_stateid
, st_perstateowner
);
474 release_open_stateid(stp
);
478 static void release_openowner(struct nfs4_stateowner
*sop
)
480 unhash_openowner(sop
);
481 list_del(&sop
->so_close_lru
);
482 nfs4_put_stateowner(sop
);
485 #define SESSION_HASH_SIZE 512
486 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
489 hash_sessionid(struct nfs4_sessionid
*sessionid
)
491 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
493 return sid
->sequence
% SESSION_HASH_SIZE
;
497 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
499 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
500 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
504 gen_sessionid(struct nfsd4_session
*ses
)
506 struct nfs4_client
*clp
= ses
->se_client
;
507 struct nfsd4_sessionid
*sid
;
509 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
510 sid
->clientid
= clp
->cl_clientid
;
511 sid
->sequence
= current_sessionid
++;
516 * The protocol defines ca_maxresponssize_cached to include the size of
517 * the rpc header, but all we need to cache is the data starting after
518 * the end of the initial SEQUENCE operation--the rest we regenerate
519 * each time. Therefore we can advertise a ca_maxresponssize_cached
520 * value that is the number of bytes in our cache plus a few additional
521 * bytes. In order to stay on the safe side, and not promise more than
522 * we can cache, those additional bytes must be the minimum possible: 24
523 * bytes of rpc header (xid through accept state, with AUTH_NULL
524 * verifier), 12 for the compound header (with zero-length tag), and 44
525 * for the SEQUENCE op response:
527 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
530 free_session_slots(struct nfsd4_session
*ses
)
534 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
535 kfree(ses
->se_slots
[i
]);
539 * We don't actually need to cache the rpc and session headers, so we
540 * can allocate a little less for each slot:
542 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
544 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
547 static int nfsd4_sanitize_slot_size(u32 size
)
549 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
550 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
556 * XXX: If we run out of reserved DRC memory we could (up to a point)
557 * re-negotiate active sessions and reduce their slot usage to make
558 * rooom for new connections. For now we just fail the create session.
560 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
564 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
566 spin_lock(&nfsd_drc_lock
);
567 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
568 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
569 num
= min_t(int, num
, avail
/ slotsize
);
570 nfsd_drc_mem_used
+= num
* slotsize
;
571 spin_unlock(&nfsd_drc_lock
);
576 static void nfsd4_put_drc_mem(int slotsize
, int num
)
578 spin_lock(&nfsd_drc_lock
);
579 nfsd_drc_mem_used
-= slotsize
* num
;
580 spin_unlock(&nfsd_drc_lock
);
583 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
585 struct nfsd4_session
*new;
588 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
589 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
590 mem
= numslots
* sizeof(struct nfsd4_slot
*);
592 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
595 /* allocate each struct nfsd4_slot and data cache in one piece */
596 for (i
= 0; i
< numslots
; i
++) {
597 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
598 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
599 if (!new->se_slots
[i
])
605 kfree(new->se_slots
[i
]);
610 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
612 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
614 new->maxreqs
= numslots
;
615 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
616 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
617 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
618 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
619 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
622 static void free_conn(struct nfsd4_conn
*c
)
624 svc_xprt_put(c
->cn_xprt
);
628 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
630 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
631 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
633 spin_lock(&clp
->cl_lock
);
634 if (!list_empty(&c
->cn_persession
)) {
635 list_del(&c
->cn_persession
);
638 spin_unlock(&clp
->cl_lock
);
639 nfsd4_probe_callback(clp
);
642 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
644 struct nfsd4_conn
*conn
;
646 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
649 svc_xprt_get(rqstp
->rq_xprt
);
650 conn
->cn_xprt
= rqstp
->rq_xprt
;
651 conn
->cn_flags
= flags
;
652 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
656 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
658 conn
->cn_session
= ses
;
659 list_add(&conn
->cn_persession
, &ses
->se_conns
);
662 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
664 struct nfs4_client
*clp
= ses
->se_client
;
666 spin_lock(&clp
->cl_lock
);
667 __nfsd4_hash_conn(conn
, ses
);
668 spin_unlock(&clp
->cl_lock
);
671 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
673 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
674 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
677 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
679 struct nfsd4_conn
*conn
;
682 conn
= alloc_conn(rqstp
, dir
);
684 return nfserr_jukebox
;
685 nfsd4_hash_conn(conn
, ses
);
686 ret
= nfsd4_register_conn(conn
);
688 /* oops; xprt is already down: */
689 nfsd4_conn_lost(&conn
->cn_xpt_user
);
693 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
695 u32 dir
= NFS4_CDFC4_FORE
;
697 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
698 dir
|= NFS4_CDFC4_BACK
;
700 return nfsd4_new_conn(rqstp
, ses
, dir
);
703 /* must be called under client_lock */
704 static void nfsd4_del_conns(struct nfsd4_session
*s
)
706 struct nfs4_client
*clp
= s
->se_client
;
707 struct nfsd4_conn
*c
;
709 spin_lock(&clp
->cl_lock
);
710 while (!list_empty(&s
->se_conns
)) {
711 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
712 list_del_init(&c
->cn_persession
);
713 spin_unlock(&clp
->cl_lock
);
715 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
718 spin_lock(&clp
->cl_lock
);
720 spin_unlock(&clp
->cl_lock
);
723 void free_session(struct kref
*kref
)
725 struct nfsd4_session
*ses
;
728 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
729 nfsd4_del_conns(ses
);
730 spin_lock(&nfsd_drc_lock
);
731 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
732 nfsd_drc_mem_used
-= mem
;
733 spin_unlock(&nfsd_drc_lock
);
734 free_session_slots(ses
);
738 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
740 struct nfsd4_session
*new;
741 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
742 int numslots
, slotsize
;
747 * Note decreasing slot size below client's request may
748 * make it difficult for client to function correctly, whereas
749 * decreasing the number of slots will (just?) affect
750 * performance. When short on memory we therefore prefer to
751 * decrease number of slots instead of their size.
753 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
754 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
758 new = alloc_session(slotsize
, numslots
);
760 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
763 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
765 new->se_client
= clp
;
768 INIT_LIST_HEAD(&new->se_conns
);
770 new->se_cb_seq_nr
= 1;
771 new->se_flags
= cses
->flags
;
772 new->se_cb_prog
= cses
->callback_prog
;
773 kref_init(&new->se_ref
);
774 idx
= hash_sessionid(&new->se_sessionid
);
775 spin_lock(&client_lock
);
776 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
777 spin_lock(&clp
->cl_lock
);
778 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
779 spin_unlock(&clp
->cl_lock
);
780 spin_unlock(&client_lock
);
782 status
= nfsd4_new_conn_from_crses(rqstp
, new);
783 /* whoops: benny points out, status is ignored! (err, or bogus) */
785 free_session(&new->se_ref
);
788 if (cses
->flags
& SESSION4_BACK_CHAN
) {
789 struct sockaddr
*sa
= svc_addr(rqstp
);
791 * This is a little silly; with sessions there's no real
792 * use for the callback address. Use the peer address
793 * as a reasonable default for now, but consider fixing
794 * the rpc client not to require an address in the
797 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
798 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
800 nfsd4_probe_callback(clp
);
804 /* caller must hold client_lock */
805 static struct nfsd4_session
*
806 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
808 struct nfsd4_session
*elem
;
811 dump_sessionid(__func__
, sessionid
);
812 idx
= hash_sessionid(sessionid
);
813 /* Search in the appropriate list */
814 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
815 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
816 NFS4_MAX_SESSIONID_LEN
)) {
821 dprintk("%s: session not found\n", __func__
);
825 /* caller must hold client_lock */
827 unhash_session(struct nfsd4_session
*ses
)
829 list_del(&ses
->se_hash
);
830 spin_lock(&ses
->se_client
->cl_lock
);
831 list_del(&ses
->se_perclnt
);
832 spin_unlock(&ses
->se_client
->cl_lock
);
835 /* must be called under the client_lock */
837 renew_client_locked(struct nfs4_client
*clp
)
839 if (is_client_expired(clp
)) {
840 dprintk("%s: client (clientid %08x/%08x) already expired\n",
842 clp
->cl_clientid
.cl_boot
,
843 clp
->cl_clientid
.cl_id
);
848 * Move client to the end to the LRU list.
850 dprintk("renewing client (clientid %08x/%08x)\n",
851 clp
->cl_clientid
.cl_boot
,
852 clp
->cl_clientid
.cl_id
);
853 list_move_tail(&clp
->cl_lru
, &client_lru
);
854 clp
->cl_time
= get_seconds();
858 renew_client(struct nfs4_client
*clp
)
860 spin_lock(&client_lock
);
861 renew_client_locked(clp
);
862 spin_unlock(&client_lock
);
865 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
867 STALE_CLIENTID(clientid_t
*clid
)
869 if (clid
->cl_boot
== boot_time
)
871 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
872 clid
->cl_boot
, clid
->cl_id
, boot_time
);
877 * XXX Should we use a slab cache ?
878 * This type of memory management is somewhat inefficient, but we use it
879 * anyway since SETCLIENTID is not a common operation.
881 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
883 struct nfs4_client
*clp
;
885 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
888 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
889 if (clp
->cl_name
.data
== NULL
) {
893 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
894 clp
->cl_name
.len
= name
.len
;
899 free_client(struct nfs4_client
*clp
)
901 while (!list_empty(&clp
->cl_sessions
)) {
902 struct nfsd4_session
*ses
;
903 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
905 list_del(&ses
->se_perclnt
);
906 nfsd4_put_session(ses
);
908 if (clp
->cl_cred
.cr_group_info
)
909 put_group_info(clp
->cl_cred
.cr_group_info
);
910 kfree(clp
->cl_principal
);
911 kfree(clp
->cl_name
.data
);
916 release_session_client(struct nfsd4_session
*session
)
918 struct nfs4_client
*clp
= session
->se_client
;
920 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
922 if (is_client_expired(clp
)) {
924 session
->se_client
= NULL
;
926 renew_client_locked(clp
);
927 spin_unlock(&client_lock
);
930 /* must be called under the client_lock */
932 unhash_client_locked(struct nfs4_client
*clp
)
934 struct nfsd4_session
*ses
;
936 mark_client_expired(clp
);
937 list_del(&clp
->cl_lru
);
938 spin_lock(&clp
->cl_lock
);
939 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
940 list_del_init(&ses
->se_hash
);
941 spin_unlock(&clp
->cl_lock
);
945 expire_client(struct nfs4_client
*clp
)
947 struct nfs4_stateowner
*sop
;
948 struct nfs4_delegation
*dp
;
949 struct list_head reaplist
;
951 INIT_LIST_HEAD(&reaplist
);
952 spin_lock(&recall_lock
);
953 while (!list_empty(&clp
->cl_delegations
)) {
954 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
955 list_del_init(&dp
->dl_perclnt
);
956 list_move(&dp
->dl_recall_lru
, &reaplist
);
958 spin_unlock(&recall_lock
);
959 while (!list_empty(&reaplist
)) {
960 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
961 list_del_init(&dp
->dl_recall_lru
);
962 unhash_delegation(dp
);
964 while (!list_empty(&clp
->cl_openowners
)) {
965 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
966 release_openowner(sop
);
968 nfsd4_shutdown_callback(clp
);
969 if (clp
->cl_cb_conn
.cb_xprt
)
970 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
971 list_del(&clp
->cl_idhash
);
972 list_del(&clp
->cl_strhash
);
973 spin_lock(&client_lock
);
974 unhash_client_locked(clp
);
975 if (atomic_read(&clp
->cl_refcount
) == 0)
977 spin_unlock(&client_lock
);
980 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
982 memcpy(target
->cl_verifier
.data
, source
->data
,
983 sizeof(target
->cl_verifier
.data
));
986 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
988 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
989 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
992 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
994 target
->cr_uid
= source
->cr_uid
;
995 target
->cr_gid
= source
->cr_gid
;
996 target
->cr_group_info
= source
->cr_group_info
;
997 get_group_info(target
->cr_group_info
);
1000 static int same_name(const char *n1
, const char *n2
)
1002 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1006 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1008 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1012 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1014 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1017 /* XXX what about NGROUP */
1019 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1021 return cr1
->cr_uid
== cr2
->cr_uid
;
1024 static void gen_clid(struct nfs4_client
*clp
)
1026 static u32 current_clientid
= 1;
1028 clp
->cl_clientid
.cl_boot
= boot_time
;
1029 clp
->cl_clientid
.cl_id
= current_clientid
++;
1032 static void gen_confirm(struct nfs4_client
*clp
)
1037 p
= (u32
*)clp
->cl_confirm
.data
;
1038 *p
++ = get_seconds();
1042 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1043 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1045 struct nfs4_client
*clp
;
1046 struct sockaddr
*sa
= svc_addr(rqstp
);
1049 clp
= alloc_client(name
);
1053 INIT_LIST_HEAD(&clp
->cl_sessions
);
1055 princ
= svc_gss_principal(rqstp
);
1057 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1058 if (clp
->cl_principal
== NULL
) {
1064 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1065 atomic_set(&clp
->cl_refcount
, 0);
1066 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1067 INIT_LIST_HEAD(&clp
->cl_idhash
);
1068 INIT_LIST_HEAD(&clp
->cl_strhash
);
1069 INIT_LIST_HEAD(&clp
->cl_openowners
);
1070 INIT_LIST_HEAD(&clp
->cl_delegations
);
1071 INIT_LIST_HEAD(&clp
->cl_lru
);
1072 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1073 spin_lock_init(&clp
->cl_lock
);
1074 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1075 clp
->cl_time
= get_seconds();
1076 clear_bit(0, &clp
->cl_cb_slot_busy
);
1077 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1078 copy_verf(clp
, verf
);
1079 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1080 clp
->cl_flavor
= rqstp
->rq_flavor
;
1081 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1083 clp
->cl_cb_session
= NULL
;
1087 static int check_name(struct xdr_netobj name
)
1091 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1092 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1099 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1101 unsigned int idhashval
;
1103 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1104 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1105 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1110 move_to_confirmed(struct nfs4_client
*clp
)
1112 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1113 unsigned int strhashval
;
1115 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1116 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1117 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1118 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1122 static struct nfs4_client
*
1123 find_confirmed_client(clientid_t
*clid
)
1125 struct nfs4_client
*clp
;
1126 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1128 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1129 if (same_clid(&clp
->cl_clientid
, clid
))
1135 static struct nfs4_client
*
1136 find_unconfirmed_client(clientid_t
*clid
)
1138 struct nfs4_client
*clp
;
1139 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1141 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1142 if (same_clid(&clp
->cl_clientid
, clid
))
1148 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1150 return clp
->cl_exchange_flags
!= 0;
1153 static struct nfs4_client
*
1154 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1156 struct nfs4_client
*clp
;
1158 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1159 if (same_name(clp
->cl_recdir
, dname
))
1165 static struct nfs4_client
*
1166 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1168 struct nfs4_client
*clp
;
1170 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1171 if (same_name(clp
->cl_recdir
, dname
))
1177 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1181 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1182 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1185 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1186 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1192 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1194 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1195 struct sockaddr
*sa
= svc_addr(rqstp
);
1196 u32 scopeid
= rpc_get_scope_id(sa
);
1197 unsigned short expected_family
;
1199 /* Currently, we only support tcp and tcp6 for the callback channel */
1200 if (se
->se_callback_netid_len
== 3 &&
1201 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1202 expected_family
= AF_INET
;
1203 else if (se
->se_callback_netid_len
== 4 &&
1204 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1205 expected_family
= AF_INET6
;
1209 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1210 se
->se_callback_addr_len
,
1211 (struct sockaddr
*)&conn
->cb_addr
,
1212 sizeof(conn
->cb_addr
));
1214 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1217 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1218 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1220 conn
->cb_prog
= se
->se_callback_prog
;
1221 conn
->cb_ident
= se
->se_callback_ident
;
1222 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1225 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1226 conn
->cb_addrlen
= 0;
1227 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1228 "will not receive delegations\n",
1229 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1235 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1238 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1240 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1243 dprintk("--> %s slot %p\n", __func__
, slot
);
1245 slot
->sl_opcnt
= resp
->opcnt
;
1246 slot
->sl_status
= resp
->cstate
.status
;
1248 if (nfsd4_not_cached(resp
)) {
1249 slot
->sl_datalen
= 0;
1252 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1253 base
= (char *)resp
->cstate
.datap
-
1254 (char *)resp
->xbuf
->head
[0].iov_base
;
1255 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1257 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1262 * Encode the replay sequence operation from the slot values.
1263 * If cachethis is FALSE encode the uncached rep error on the next
1264 * operation which sets resp->p and increments resp->opcnt for
1265 * nfs4svc_encode_compoundres.
1269 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1270 struct nfsd4_compoundres
*resp
)
1272 struct nfsd4_op
*op
;
1273 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1275 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1276 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1278 /* Encode the replayed sequence operation */
1279 op
= &args
->ops
[resp
->opcnt
- 1];
1280 nfsd4_encode_operation(resp
, op
);
1282 /* Return nfserr_retry_uncached_rep in next operation. */
1283 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1284 op
= &args
->ops
[resp
->opcnt
++];
1285 op
->status
= nfserr_retry_uncached_rep
;
1286 nfsd4_encode_operation(resp
, op
);
1292 * The sequence operation is not cached because we can use the slot and
1296 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1297 struct nfsd4_sequence
*seq
)
1299 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1302 dprintk("--> %s slot %p\n", __func__
, slot
);
1304 /* Either returns 0 or nfserr_retry_uncached */
1305 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1306 if (status
== nfserr_retry_uncached_rep
)
1309 /* The sequence operation has been encoded, cstate->datap set. */
1310 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1312 resp
->opcnt
= slot
->sl_opcnt
;
1313 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1314 status
= slot
->sl_status
;
1320 * Set the exchange_id flags returned by the server.
1323 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1325 /* pNFS is not supported */
1326 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1328 /* Referrals are supported, Migration is not. */
1329 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1331 /* set the wire flags to return to client. */
1332 clid
->flags
= new->cl_exchange_flags
;
1336 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1337 struct nfsd4_compound_state
*cstate
,
1338 struct nfsd4_exchange_id
*exid
)
1340 struct nfs4_client
*unconf
, *conf
, *new;
1342 unsigned int strhashval
;
1343 char dname
[HEXDIR_LEN
];
1344 char addr_str
[INET6_ADDRSTRLEN
];
1345 nfs4_verifier verf
= exid
->verifier
;
1346 struct sockaddr
*sa
= svc_addr(rqstp
);
1348 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1349 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1350 "ip_addr=%s flags %x, spa_how %d\n",
1351 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1352 addr_str
, exid
->flags
, exid
->spa_how
);
1354 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1355 return nfserr_inval
;
1357 /* Currently only support SP4_NONE */
1358 switch (exid
->spa_how
) {
1362 return nfserr_serverfault
;
1364 BUG(); /* checked by xdr code */
1366 return nfserr_serverfault
; /* no excuse :-/ */
1369 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1374 strhashval
= clientstr_hashval(dname
);
1379 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1381 if (!clp_used_exchangeid(conf
)) {
1382 status
= nfserr_clid_inuse
; /* XXX: ? */
1385 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1386 /* 18.35.4 case 8 */
1387 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1388 status
= nfserr_not_same
;
1391 /* Client reboot: destroy old state */
1392 expire_client(conf
);
1395 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1396 /* 18.35.4 case 9 */
1397 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1398 status
= nfserr_perm
;
1401 expire_client(conf
);
1405 * Set bit when the owner id and verifier map to an already
1406 * confirmed client id (18.35.3).
1408 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1411 * Falling into 18.35.4 case 2, possible router replay.
1412 * Leave confirmed record intact and return same result.
1414 copy_verf(conf
, &verf
);
1419 /* 18.35.4 case 7 */
1420 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1421 status
= nfserr_noent
;
1425 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1428 * Possible retry or client restart. Per 18.35.4 case 4,
1429 * a new unconfirmed record should be generated regardless
1430 * of whether any properties have changed.
1432 expire_client(unconf
);
1437 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1439 status
= nfserr_jukebox
;
1444 add_to_unconfirmed(new, strhashval
);
1446 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1447 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1450 nfsd4_set_ex_flags(new, exid
);
1452 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1453 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1457 nfs4_unlock_state();
1459 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1464 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1466 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1469 /* The slot is in use, and no response has been sent. */
1471 if (seqid
== slot_seqid
)
1472 return nfserr_jukebox
;
1474 return nfserr_seq_misordered
;
1477 if (likely(seqid
== slot_seqid
+ 1))
1480 if (seqid
== slot_seqid
)
1481 return nfserr_replay_cache
;
1483 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1485 /* Misordered replay or misordered new request */
1486 return nfserr_seq_misordered
;
1490 * Cache the create session result into the create session single DRC
1491 * slot cache by saving the xdr structure. sl_seqid has been set.
1492 * Do this for solo or embedded create session operations.
1495 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1496 struct nfsd4_clid_slot
*slot
, int nfserr
)
1498 slot
->sl_status
= nfserr
;
1499 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1503 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1504 struct nfsd4_clid_slot
*slot
)
1506 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1507 return slot
->sl_status
;
1511 nfsd4_create_session(struct svc_rqst
*rqstp
,
1512 struct nfsd4_compound_state
*cstate
,
1513 struct nfsd4_create_session
*cr_ses
)
1515 struct sockaddr
*sa
= svc_addr(rqstp
);
1516 struct nfs4_client
*conf
, *unconf
;
1517 struct nfsd4_session
*new;
1518 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1519 bool confirm_me
= false;
1523 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1524 conf
= find_confirmed_client(&cr_ses
->clientid
);
1527 cs_slot
= &conf
->cl_cs_slot
;
1528 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1529 if (status
== nfserr_replay_cache
) {
1530 dprintk("Got a create_session replay! seqid= %d\n",
1532 /* Return the cached reply status */
1533 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1535 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1536 status
= nfserr_seq_misordered
;
1537 dprintk("Sequence misordered!\n");
1538 dprintk("Expected seqid= %d but got seqid= %d\n",
1539 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1542 } else if (unconf
) {
1543 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1544 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1545 status
= nfserr_clid_inuse
;
1549 cs_slot
= &unconf
->cl_cs_slot
;
1550 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1552 /* an unconfirmed replay returns misordered */
1553 status
= nfserr_seq_misordered
;
1560 status
= nfserr_stale_clientid
;
1565 * XXX: we should probably set this at creation time, and check
1566 * for consistent minorversion use throughout:
1568 conf
->cl_minorversion
= 1;
1570 * We do not support RDMA or persistent sessions
1572 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1573 cr_ses
->flags
&= ~SESSION4_RDMA
;
1575 status
= nfserr_jukebox
;
1576 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1580 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1581 NFS4_MAX_SESSIONID_LEN
);
1582 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1583 sizeof(struct nfsd4_channel_attrs
));
1584 cs_slot
->sl_seqid
++;
1585 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1587 /* cache solo and embedded create sessions under the state lock */
1588 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1590 move_to_confirmed(conf
);
1592 nfs4_unlock_state();
1593 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1597 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1599 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1600 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1602 return argp
->opcnt
== resp
->opcnt
;
1605 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1608 case NFS4_CDFC4_FORE
:
1609 case NFS4_CDFC4_BACK
:
1611 case NFS4_CDFC4_FORE_OR_BOTH
:
1612 case NFS4_CDFC4_BACK_OR_BOTH
:
1613 *dir
= NFS4_CDFC4_BOTH
;
1616 return nfserr_inval
;
1619 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1620 struct nfsd4_compound_state
*cstate
,
1621 struct nfsd4_bind_conn_to_session
*bcts
)
1625 if (!nfsd4_last_compound_op(rqstp
))
1626 return nfserr_not_only_op
;
1627 spin_lock(&client_lock
);
1628 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1629 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1630 * client_lock iself: */
1631 if (cstate
->session
) {
1632 nfsd4_get_session(cstate
->session
);
1633 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1635 spin_unlock(&client_lock
);
1636 if (!cstate
->session
)
1637 return nfserr_badsession
;
1639 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1640 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1644 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1648 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1652 nfsd4_destroy_session(struct svc_rqst
*r
,
1653 struct nfsd4_compound_state
*cstate
,
1654 struct nfsd4_destroy_session
*sessionid
)
1656 struct nfsd4_session
*ses
;
1657 u32 status
= nfserr_badsession
;
1660 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1661 * - Should we return nfserr_back_chan_busy if waiting for
1662 * callbacks on to-be-destroyed session?
1663 * - Do we need to clear any callback info from previous session?
1666 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1667 if (!nfsd4_last_compound_op(r
))
1668 return nfserr_not_only_op
;
1670 dump_sessionid(__func__
, &sessionid
->sessionid
);
1671 spin_lock(&client_lock
);
1672 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1674 spin_unlock(&client_lock
);
1678 unhash_session(ses
);
1679 spin_unlock(&client_lock
);
1682 nfsd4_probe_callback_sync(ses
->se_client
);
1683 nfs4_unlock_state();
1685 nfsd4_del_conns(ses
);
1687 nfsd4_put_session(ses
);
1690 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1694 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1696 struct nfsd4_conn
*c
;
1698 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1699 if (c
->cn_xprt
== xpt
) {
1706 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1708 struct nfs4_client
*clp
= ses
->se_client
;
1709 struct nfsd4_conn
*c
;
1712 spin_lock(&clp
->cl_lock
);
1713 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1715 spin_unlock(&clp
->cl_lock
);
1719 __nfsd4_hash_conn(new, ses
);
1720 spin_unlock(&clp
->cl_lock
);
1721 ret
= nfsd4_register_conn(new);
1723 /* oops; xprt is already down: */
1724 nfsd4_conn_lost(&new->cn_xpt_user
);
1729 nfsd4_sequence(struct svc_rqst
*rqstp
,
1730 struct nfsd4_compound_state
*cstate
,
1731 struct nfsd4_sequence
*seq
)
1733 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1734 struct nfsd4_session
*session
;
1735 struct nfsd4_slot
*slot
;
1736 struct nfsd4_conn
*conn
;
1739 if (resp
->opcnt
!= 1)
1740 return nfserr_sequence_pos
;
1743 * Will be either used or freed by nfsd4_sequence_check_conn
1746 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1748 return nfserr_jukebox
;
1750 spin_lock(&client_lock
);
1751 status
= nfserr_badsession
;
1752 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1756 status
= nfserr_badslot
;
1757 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1760 slot
= session
->se_slots
[seq
->slotid
];
1761 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1763 /* We do not negotiate the number of slots yet, so set the
1764 * maxslots to the session maxreqs which is used to encode
1765 * sr_highest_slotid and the sr_target_slot id to maxslots */
1766 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1768 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1769 if (status
== nfserr_replay_cache
) {
1770 cstate
->slot
= slot
;
1771 cstate
->session
= session
;
1772 /* Return the cached reply status and set cstate->status
1773 * for nfsd4_proc_compound processing */
1774 status
= nfsd4_replay_cache_entry(resp
, seq
);
1775 cstate
->status
= nfserr_replay_cache
;
1781 nfsd4_sequence_check_conn(conn
, session
);
1784 /* Success! bump slot seqid */
1785 slot
->sl_inuse
= true;
1786 slot
->sl_seqid
= seq
->seqid
;
1787 slot
->sl_cachethis
= seq
->cachethis
;
1789 cstate
->slot
= slot
;
1790 cstate
->session
= session
;
1793 /* Hold a session reference until done processing the compound. */
1794 if (cstate
->session
) {
1795 struct nfs4_client
*clp
= session
->se_client
;
1797 nfsd4_get_session(cstate
->session
);
1798 atomic_inc(&clp
->cl_refcount
);
1799 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1800 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1803 spin_unlock(&client_lock
);
1804 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1809 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1811 if (rc
->rca_one_fs
) {
1812 if (!cstate
->current_fh
.fh_dentry
)
1813 return nfserr_nofilehandle
;
1815 * We don't take advantage of the rca_one_fs case.
1816 * That's OK, it's optional, we can safely ignore it.
1821 if (is_client_expired(cstate
->session
->se_client
)) {
1822 nfs4_unlock_state();
1824 * The following error isn't really legal.
1825 * But we only get here if the client just explicitly
1826 * destroyed the client. Surely it no longer cares what
1827 * error it gets back on an operation for the dead
1830 return nfserr_stale_clientid
;
1832 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1833 nfs4_unlock_state();
1838 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1839 struct nfsd4_setclientid
*setclid
)
1841 struct xdr_netobj clname
= {
1842 .len
= setclid
->se_namelen
,
1843 .data
= setclid
->se_name
,
1845 nfs4_verifier clverifier
= setclid
->se_verf
;
1846 unsigned int strhashval
;
1847 struct nfs4_client
*conf
, *unconf
, *new;
1849 char dname
[HEXDIR_LEN
];
1851 if (!check_name(clname
))
1852 return nfserr_inval
;
1854 status
= nfs4_make_rec_clidname(dname
, &clname
);
1859 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1860 * We get here on a DRC miss.
1863 strhashval
= clientstr_hashval(dname
);
1866 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1868 /* RFC 3530 14.2.33 CASE 0: */
1869 status
= nfserr_clid_inuse
;
1870 if (clp_used_exchangeid(conf
))
1872 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1873 char addr_str
[INET6_ADDRSTRLEN
];
1874 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1876 dprintk("NFSD: setclientid: string in use by client "
1877 "at %s\n", addr_str
);
1882 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1883 * has a description of SETCLIENTID request processing consisting
1884 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1886 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1887 status
= nfserr_resource
;
1890 * RFC 3530 14.2.33 CASE 4:
1891 * placed first, because it is the normal case
1894 expire_client(unconf
);
1895 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1899 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1901 * RFC 3530 14.2.33 CASE 1:
1902 * probable callback update
1905 /* Note this is removing unconfirmed {*x***},
1906 * which is stronger than RFC recommended {vxc**}.
1907 * This has the advantage that there is at most
1908 * one {*x***} in either list at any time.
1910 expire_client(unconf
);
1912 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1915 copy_clid(new, conf
);
1916 } else if (!unconf
) {
1918 * RFC 3530 14.2.33 CASE 2:
1919 * probable client reboot; state will be removed if
1922 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1928 * RFC 3530 14.2.33 CASE 3:
1929 * probable client reboot; state will be removed if
1932 expire_client(unconf
);
1933 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1939 * XXX: we should probably set this at creation time, and check
1940 * for consistent minorversion use throughout:
1942 new->cl_minorversion
= 0;
1943 gen_callback(new, setclid
, rqstp
);
1944 add_to_unconfirmed(new, strhashval
);
1945 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1946 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
1947 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
1950 nfs4_unlock_state();
1956 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1957 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1958 * bullets, labeled as CASE1 - CASE4 below.
1961 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
1962 struct nfsd4_compound_state
*cstate
,
1963 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
1965 struct sockaddr
*sa
= svc_addr(rqstp
);
1966 struct nfs4_client
*conf
, *unconf
;
1967 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
1968 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
1971 if (STALE_CLIENTID(clid
))
1972 return nfserr_stale_clientid
;
1974 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1975 * We get here on a DRC miss.
1980 conf
= find_confirmed_client(clid
);
1981 unconf
= find_unconfirmed_client(clid
);
1983 status
= nfserr_clid_inuse
;
1984 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
1986 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
1990 * section 14.2.34 of RFC 3530 has a description of
1991 * SETCLIENTID_CONFIRM request processing consisting
1992 * of 4 bullet points, labeled as CASE1 - CASE4 below.
1994 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
1996 * RFC 3530 14.2.34 CASE 1:
1999 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2000 status
= nfserr_clid_inuse
;
2002 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2003 nfsd4_probe_callback(conf
);
2004 expire_client(unconf
);
2008 } else if (conf
&& !unconf
) {
2010 * RFC 3530 14.2.34 CASE 2:
2011 * probable retransmitted request; play it safe and
2014 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2015 status
= nfserr_clid_inuse
;
2018 } else if (!conf
&& unconf
2019 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2021 * RFC 3530 14.2.34 CASE 3:
2022 * Normal case; new or rebooted client:
2024 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2025 status
= nfserr_clid_inuse
;
2028 clientstr_hashval(unconf
->cl_recdir
);
2029 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2032 nfsd4_remove_clid_dir(conf
);
2033 expire_client(conf
);
2035 move_to_confirmed(unconf
);
2037 nfsd4_probe_callback(conf
);
2040 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2041 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2044 * RFC 3530 14.2.34 CASE 4:
2045 * Client probably hasn't noticed that we rebooted yet.
2047 status
= nfserr_stale_clientid
;
2049 /* check that we have hit one of the cases...*/
2050 status
= nfserr_clid_inuse
;
2053 nfs4_unlock_state();
2057 /* OPEN Share state helper functions */
2058 static inline struct nfs4_file
*
2059 alloc_init_file(struct inode
*ino
)
2061 struct nfs4_file
*fp
;
2062 unsigned int hashval
= file_hashval(ino
);
2064 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2066 atomic_set(&fp
->fi_ref
, 1);
2067 INIT_LIST_HEAD(&fp
->fi_hash
);
2068 INIT_LIST_HEAD(&fp
->fi_stateids
);
2069 INIT_LIST_HEAD(&fp
->fi_delegations
);
2070 fp
->fi_inode
= igrab(ino
);
2071 fp
->fi_id
= current_fileid
++;
2072 fp
->fi_had_conflict
= false;
2073 fp
->fi_lease
= NULL
;
2074 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2075 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2076 spin_lock(&recall_lock
);
2077 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2078 spin_unlock(&recall_lock
);
2085 nfsd4_free_slab(struct kmem_cache
**slab
)
2089 kmem_cache_destroy(*slab
);
2094 nfsd4_free_slabs(void)
2096 nfsd4_free_slab(&stateowner_slab
);
2097 nfsd4_free_slab(&file_slab
);
2098 nfsd4_free_slab(&stateid_slab
);
2099 nfsd4_free_slab(&deleg_slab
);
2103 nfsd4_init_slabs(void)
2105 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
2106 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
2107 if (stateowner_slab
== NULL
)
2109 file_slab
= kmem_cache_create("nfsd4_files",
2110 sizeof(struct nfs4_file
), 0, 0, NULL
);
2111 if (file_slab
== NULL
)
2113 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2114 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2115 if (stateid_slab
== NULL
)
2117 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2118 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2119 if (deleg_slab
== NULL
)
2124 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2129 nfs4_free_stateowner(struct kref
*kref
)
2131 struct nfs4_stateowner
*sop
=
2132 container_of(kref
, struct nfs4_stateowner
, so_ref
);
2133 kfree(sop
->so_owner
.data
);
2134 kmem_cache_free(stateowner_slab
, sop
);
2137 static inline struct nfs4_stateowner
*
2138 alloc_stateowner(struct xdr_netobj
*owner
)
2140 struct nfs4_stateowner
*sop
;
2142 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
2143 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
2144 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
2145 sop
->so_owner
.len
= owner
->len
;
2146 kref_init(&sop
->so_ref
);
2149 kmem_cache_free(stateowner_slab
, sop
);
2154 static struct nfs4_stateowner
*
2155 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2156 struct nfs4_stateowner
*sop
;
2157 struct nfs4_replay
*rp
;
2158 unsigned int idhashval
;
2160 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
2162 idhashval
= ownerid_hashval(current_ownerid
);
2163 INIT_LIST_HEAD(&sop
->so_idhash
);
2164 INIT_LIST_HEAD(&sop
->so_strhash
);
2165 INIT_LIST_HEAD(&sop
->so_perclient
);
2166 INIT_LIST_HEAD(&sop
->so_stateids
);
2167 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
2168 INIT_LIST_HEAD(&sop
->so_close_lru
);
2170 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
2171 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2172 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
2173 sop
->so_is_open_owner
= 1;
2174 sop
->so_id
= current_ownerid
++;
2175 sop
->so_client
= clp
;
2176 sop
->so_seqid
= open
->op_seqid
;
2177 sop
->so_confirmed
= 0;
2178 rp
= &sop
->so_replay
;
2179 rp
->rp_status
= nfserr_serverfault
;
2181 rp
->rp_buf
= rp
->rp_ibuf
;
2186 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2187 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2188 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2190 INIT_LIST_HEAD(&stp
->st_hash
);
2191 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2192 INIT_LIST_HEAD(&stp
->st_lockowners
);
2193 INIT_LIST_HEAD(&stp
->st_perfile
);
2194 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2195 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2196 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2197 stp
->st_stateowner
= sop
;
2200 stp
->st_stateid
.si_boot
= boot_time
;
2201 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2202 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2203 stp
->st_stateid
.si_generation
= 0;
2204 stp
->st_access_bmap
= 0;
2205 stp
->st_deny_bmap
= 0;
2206 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2207 &stp
->st_access_bmap
);
2208 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2209 stp
->st_openstp
= NULL
;
2213 move_to_close_lru(struct nfs4_stateowner
*sop
)
2215 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
2217 list_move_tail(&sop
->so_close_lru
, &close_lru
);
2218 sop
->so_time
= get_seconds();
2222 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2225 return (sop
->so_owner
.len
== owner
->len
) &&
2226 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2227 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2230 static struct nfs4_stateowner
*
2231 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2233 struct nfs4_stateowner
*so
= NULL
;
2235 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2236 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2242 /* search file_hashtbl[] for file */
2243 static struct nfs4_file
*
2244 find_file(struct inode
*ino
)
2246 unsigned int hashval
= file_hashval(ino
);
2247 struct nfs4_file
*fp
;
2249 spin_lock(&recall_lock
);
2250 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2251 if (fp
->fi_inode
== ino
) {
2253 spin_unlock(&recall_lock
);
2257 spin_unlock(&recall_lock
);
2261 static inline int access_valid(u32 x
, u32 minorversion
)
2263 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2265 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2267 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2268 if (minorversion
&& x
) {
2269 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2271 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2273 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2280 static inline int deny_valid(u32 x
)
2282 /* Note: unlike access bits, deny bits may be zero. */
2283 return x
<= NFS4_SHARE_DENY_BOTH
;
2287 * Called to check deny when READ with all zero stateid or
2288 * WRITE with all zero or all one stateid
2291 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2293 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2294 struct nfs4_file
*fp
;
2295 struct nfs4_stateid
*stp
;
2298 dprintk("NFSD: nfs4_share_conflict\n");
2300 fp
= find_file(ino
);
2303 ret
= nfserr_locked
;
2304 /* Search for conflicting share reservations */
2305 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2306 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2307 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2317 nfs4_file_downgrade(struct nfs4_file
*fp
, unsigned int share_access
)
2319 if (share_access
& NFS4_SHARE_ACCESS_WRITE
)
2320 nfs4_file_put_access(fp
, O_WRONLY
);
2321 if (share_access
& NFS4_SHARE_ACCESS_READ
)
2322 nfs4_file_put_access(fp
, O_RDONLY
);
2325 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2327 /* We're assuming the state code never drops its reference
2328 * without first removing the lease. Since we're in this lease
2329 * callback (and since the lease code is serialized by the kernel
2330 * lock) we know the server hasn't removed the lease yet, we know
2331 * it's safe to take a reference: */
2332 atomic_inc(&dp
->dl_count
);
2334 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2336 /* only place dl_time is set. protected by lock_flocks*/
2337 dp
->dl_time
= get_seconds();
2339 nfsd4_cb_recall(dp
);
2342 /* Called from break_lease() with lock_flocks() held. */
2343 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2345 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2346 struct nfs4_delegation
*dp
;
2349 /* We assume break_lease is only called once per lease: */
2350 BUG_ON(fp
->fi_had_conflict
);
2352 * We don't want the locks code to timeout the lease for us;
2353 * we'll remove it ourself if a delegation isn't returned
2356 fl
->fl_break_time
= 0;
2358 spin_lock(&recall_lock
);
2359 fp
->fi_had_conflict
= true;
2360 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2361 nfsd_break_one_deleg(dp
);
2362 spin_unlock(&recall_lock
);
2366 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2369 return lease_modify(onlist
, arg
);
2374 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2375 .fl_break
= nfsd_break_deleg_cb
,
2376 .fl_change
= nfsd_change_deleg_cb
,
2381 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2382 struct nfsd4_open
*open
)
2384 clientid_t
*clientid
= &open
->op_clientid
;
2385 struct nfs4_client
*clp
= NULL
;
2386 unsigned int strhashval
;
2387 struct nfs4_stateowner
*sop
= NULL
;
2389 if (!check_name(open
->op_owner
))
2390 return nfserr_inval
;
2392 if (STALE_CLIENTID(&open
->op_clientid
))
2393 return nfserr_stale_clientid
;
2395 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
2396 sop
= find_openstateowner_str(strhashval
, open
);
2397 open
->op_stateowner
= sop
;
2399 /* Make sure the client's lease hasn't expired. */
2400 clp
= find_confirmed_client(clientid
);
2402 return nfserr_expired
;
2405 /* When sessions are used, skip open sequenceid processing */
2406 if (nfsd4_has_session(cstate
))
2408 if (!sop
->so_confirmed
) {
2409 /* Replace unconfirmed owners without checking for replay. */
2410 clp
= sop
->so_client
;
2411 release_openowner(sop
);
2412 open
->op_stateowner
= NULL
;
2415 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2416 if (sop
->so_replay
.rp_buflen
)
2417 return nfserr_replay_me
;
2418 /* The original OPEN failed so spectacularly
2419 * that we don't even have replay data saved!
2420 * Therefore, we have no choice but to continue
2421 * processing this OPEN; presumably, we'll
2422 * fail again for the same reason.
2424 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2427 if (open
->op_seqid
!= sop
->so_seqid
)
2428 return nfserr_bad_seqid
;
2430 if (open
->op_stateowner
== NULL
) {
2431 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2433 return nfserr_resource
;
2434 open
->op_stateowner
= sop
;
2436 list_del_init(&sop
->so_close_lru
);
2437 renew_client(sop
->so_client
);
2441 static inline __be32
2442 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2444 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2445 return nfserr_openmode
;
2450 static struct nfs4_delegation
*
2451 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2453 struct nfs4_delegation
*dp
;
2455 spin_lock(&recall_lock
);
2456 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2457 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
) {
2458 spin_unlock(&recall_lock
);
2461 spin_unlock(&recall_lock
);
2465 int share_access_to_flags(u32 share_access
)
2467 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2469 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2473 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2474 struct nfs4_delegation
**dp
)
2477 __be32 status
= nfserr_bad_stateid
;
2479 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2482 flags
= share_access_to_flags(open
->op_share_access
);
2483 status
= nfs4_check_delegmode(*dp
, flags
);
2487 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2491 open
->op_stateowner
->so_confirmed
= 1;
2496 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2498 struct nfs4_stateid
*local
;
2499 __be32 status
= nfserr_share_denied
;
2500 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2502 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2503 /* ignore lock owners */
2504 if (local
->st_stateowner
->so_is_open_owner
== 0)
2506 /* remember if we have seen this open owner */
2507 if (local
->st_stateowner
== sop
)
2509 /* check for conflicting share reservations */
2510 if (!test_share(local
, open
))
2518 static inline struct nfs4_stateid
*
2519 nfs4_alloc_stateid(void)
2521 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2524 static inline int nfs4_access_to_access(u32 nfs4_access
)
2528 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2529 flags
|= NFSD_MAY_READ
;
2530 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2531 flags
|= NFSD_MAY_WRITE
;
2535 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
2536 *fp
, struct svc_fh
*cur_fh
, u32 nfs4_access
)
2539 int oflag
= nfs4_access_to_omode(nfs4_access
);
2540 int access
= nfs4_access_to_access(nfs4_access
);
2542 if (!fp
->fi_fds
[oflag
]) {
2543 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2544 &fp
->fi_fds
[oflag
]);
2548 nfs4_file_get_access(fp
, oflag
);
2554 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2555 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2556 struct nfsd4_open
*open
)
2558 struct nfs4_stateid
*stp
;
2561 stp
= nfs4_alloc_stateid();
2563 return nfserr_resource
;
2565 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
->op_share_access
);
2567 kmem_cache_free(stateid_slab
, stp
);
2574 static inline __be32
2575 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2576 struct nfsd4_open
*open
)
2578 struct iattr iattr
= {
2579 .ia_valid
= ATTR_SIZE
,
2582 if (!open
->op_truncate
)
2584 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2585 return nfserr_inval
;
2586 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2590 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2592 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2596 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2598 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, op_share_access
);
2602 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2605 int oflag
= nfs4_access_to_omode(new_access
);
2606 nfs4_file_put_access(fp
, oflag
);
2610 /* remember the open */
2611 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2612 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2619 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2621 open
->op_stateowner
->so_confirmed
= 1;
2622 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2625 /* Should we give out recallable state?: */
2626 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2628 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2631 * In the sessions case, since we don't have to establish a
2632 * separate connection for callbacks, we assume it's OK
2633 * until we hear otherwise:
2635 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2638 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2640 struct file_lock
*fl
;
2642 fl
= locks_alloc_lock();
2645 locks_init_lock(fl
);
2646 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2647 fl
->fl_flags
= FL_LEASE
;
2648 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2649 fl
->fl_end
= OFFSET_MAX
;
2650 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2651 fl
->fl_pid
= current
->tgid
;
2655 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2657 struct nfs4_file
*fp
= dp
->dl_file
;
2658 struct file_lock
*fl
;
2661 fl
= nfs4_alloc_init_lease(dp
, flag
);
2664 fl
->fl_file
= find_readable_file(fp
);
2665 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2666 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2668 list_del_init(&dp
->dl_perclnt
);
2669 locks_free_lock(fl
);
2673 fp
->fi_deleg_file
= fl
->fl_file
;
2674 get_file(fp
->fi_deleg_file
);
2675 atomic_set(&fp
->fi_delegees
, 1);
2676 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2680 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2682 struct nfs4_file
*fp
= dp
->dl_file
;
2685 return nfs4_setlease(dp
, flag
);
2686 spin_lock(&recall_lock
);
2687 if (fp
->fi_had_conflict
) {
2688 spin_unlock(&recall_lock
);
2691 atomic_inc(&fp
->fi_delegees
);
2692 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2693 spin_unlock(&recall_lock
);
2694 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2699 * Attempt to hand out a delegation.
2702 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2704 struct nfs4_delegation
*dp
;
2705 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2707 int status
, flag
= 0;
2709 cb_up
= nfsd4_cb_channel_good(sop
->so_client
);
2710 flag
= NFS4_OPEN_DELEGATE_NONE
;
2711 open
->op_recall
= 0;
2712 switch (open
->op_claim_type
) {
2713 case NFS4_OPEN_CLAIM_PREVIOUS
:
2715 open
->op_recall
= 1;
2716 flag
= open
->op_delegate_type
;
2717 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2720 case NFS4_OPEN_CLAIM_NULL
:
2721 /* Let's not give out any delegations till everyone's
2722 * had the chance to reclaim theirs.... */
2723 if (locks_in_grace())
2725 if (!cb_up
|| !sop
->so_confirmed
)
2727 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2728 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2730 flag
= NFS4_OPEN_DELEGATE_READ
;
2736 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2739 status
= nfs4_set_delegation(dp
, flag
);
2743 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2745 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2746 STATEID_VAL(&dp
->dl_stateid
));
2748 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2749 && flag
== NFS4_OPEN_DELEGATE_NONE
2750 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2751 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2752 open
->op_delegate_type
= flag
;
2755 nfs4_put_delegation(dp
);
2757 flag
= NFS4_OPEN_DELEGATE_NONE
;
2762 * called with nfs4_lock_state() held.
2765 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2767 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2768 struct nfs4_file
*fp
= NULL
;
2769 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2770 struct nfs4_stateid
*stp
= NULL
;
2771 struct nfs4_delegation
*dp
= NULL
;
2774 status
= nfserr_inval
;
2775 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2776 || !deny_valid(open
->op_share_deny
))
2779 * Lookup file; if found, lookup stateid and check open request,
2780 * and check for delegations in the process of being recalled.
2781 * If not found, create the nfs4_file struct
2783 fp
= find_file(ino
);
2785 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2787 status
= nfs4_check_deleg(fp
, open
, &dp
);
2791 status
= nfserr_bad_stateid
;
2792 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2794 status
= nfserr_resource
;
2795 fp
= alloc_init_file(ino
);
2801 * OPEN the file, or upgrade an existing OPEN.
2802 * If truncate fails, the OPEN fails.
2805 /* Stateid was found, this is an OPEN upgrade */
2806 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2809 update_stateid(&stp
->st_stateid
);
2811 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2814 init_stateid(stp
, fp
, open
);
2815 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2817 release_open_stateid(stp
);
2820 if (nfsd4_has_session(&resp
->cstate
))
2821 update_stateid(&stp
->st_stateid
);
2823 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2825 if (nfsd4_has_session(&resp
->cstate
))
2826 open
->op_stateowner
->so_confirmed
= 1;
2829 * Attempt to hand out a delegation. No error return, because the
2830 * OPEN succeeds even if we fail.
2832 nfs4_open_delegation(current_fh
, open
, stp
);
2836 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2837 STATEID_VAL(&stp
->st_stateid
));
2841 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2842 nfs4_set_claim_prev(open
);
2844 * To finish the open response, we just need to set the rflags.
2846 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2847 if (!open
->op_stateowner
->so_confirmed
&&
2848 !nfsd4_has_session(&resp
->cstate
))
2849 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2855 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2858 struct nfs4_client
*clp
;
2862 dprintk("process_renew(%08x/%08x): starting\n",
2863 clid
->cl_boot
, clid
->cl_id
);
2864 status
= nfserr_stale_clientid
;
2865 if (STALE_CLIENTID(clid
))
2867 clp
= find_confirmed_client(clid
);
2868 status
= nfserr_expired
;
2870 /* We assume the client took too long to RENEW. */
2871 dprintk("nfsd4_renew: clientid not found!\n");
2875 status
= nfserr_cb_path_down
;
2876 if (!list_empty(&clp
->cl_delegations
)
2877 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2881 nfs4_unlock_state();
2885 struct lock_manager nfsd4_manager
= {
2889 nfsd4_end_grace(void)
2891 dprintk("NFSD: end of grace period\n");
2892 nfsd4_recdir_purge_old();
2893 locks_end_grace(&nfsd4_manager
);
2895 * Now that every NFSv4 client has had the chance to recover and
2896 * to see the (possibly new, possibly shorter) lease time, we
2897 * can safely set the next grace time to the current lease time:
2899 nfsd4_grace
= nfsd4_lease
;
2903 nfs4_laundromat(void)
2905 struct nfs4_client
*clp
;
2906 struct nfs4_stateowner
*sop
;
2907 struct nfs4_delegation
*dp
;
2908 struct list_head
*pos
, *next
, reaplist
;
2909 time_t cutoff
= get_seconds() - nfsd4_lease
;
2910 time_t t
, clientid_val
= nfsd4_lease
;
2911 time_t u
, test_val
= nfsd4_lease
;
2915 dprintk("NFSD: laundromat service - starting\n");
2916 if (locks_in_grace())
2918 INIT_LIST_HEAD(&reaplist
);
2919 spin_lock(&client_lock
);
2920 list_for_each_safe(pos
, next
, &client_lru
) {
2921 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2922 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
2923 t
= clp
->cl_time
- cutoff
;
2924 if (clientid_val
> t
)
2928 if (atomic_read(&clp
->cl_refcount
)) {
2929 dprintk("NFSD: client in use (clientid %08x)\n",
2930 clp
->cl_clientid
.cl_id
);
2933 unhash_client_locked(clp
);
2934 list_add(&clp
->cl_lru
, &reaplist
);
2936 spin_unlock(&client_lock
);
2937 list_for_each_safe(pos
, next
, &reaplist
) {
2938 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2939 dprintk("NFSD: purging unused client (clientid %08x)\n",
2940 clp
->cl_clientid
.cl_id
);
2941 nfsd4_remove_clid_dir(clp
);
2944 spin_lock(&recall_lock
);
2945 list_for_each_safe(pos
, next
, &del_recall_lru
) {
2946 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2947 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
2948 u
= dp
->dl_time
- cutoff
;
2953 list_move(&dp
->dl_recall_lru
, &reaplist
);
2955 spin_unlock(&recall_lock
);
2956 list_for_each_safe(pos
, next
, &reaplist
) {
2957 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2958 list_del_init(&dp
->dl_recall_lru
);
2959 unhash_delegation(dp
);
2961 test_val
= nfsd4_lease
;
2962 list_for_each_safe(pos
, next
, &close_lru
) {
2963 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
2964 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
2965 u
= sop
->so_time
- cutoff
;
2970 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2972 release_openowner(sop
);
2974 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
2975 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
2976 nfs4_unlock_state();
2977 return clientid_val
;
2980 static struct workqueue_struct
*laundry_wq
;
2981 static void laundromat_main(struct work_struct
*);
2982 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
2985 laundromat_main(struct work_struct
*not_used
)
2989 t
= nfs4_laundromat();
2990 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2991 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2994 static struct nfs4_stateowner
*
2995 search_close_lru(u32 st_id
, int flags
)
2997 struct nfs4_stateowner
*local
= NULL
;
2999 if (flags
& CLOSE_STATE
) {
3000 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
3001 if (local
->so_id
== st_id
)
3009 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
3011 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
3015 STALE_STATEID(stateid_t
*stateid
)
3017 if (stateid
->si_boot
== boot_time
)
3019 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3020 STATEID_VAL(stateid
));
3025 access_permit_read(unsigned long access_bmap
)
3027 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3028 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3029 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3033 access_permit_write(unsigned long access_bmap
)
3035 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3036 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3040 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
3042 __be32 status
= nfserr_openmode
;
3044 /* For lock stateid's, we test the parent open, not the lock: */
3045 if (stp
->st_openstp
)
3046 stp
= stp
->st_openstp
;
3047 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3049 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3056 static inline __be32
3057 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3059 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3061 else if (locks_in_grace()) {
3062 /* Answer in remaining cases depends on existence of
3063 * conflicting state; so we must wait out the grace period. */
3064 return nfserr_grace
;
3065 } else if (flags
& WR_STATE
)
3066 return nfs4_share_conflict(current_fh
,
3067 NFS4_SHARE_DENY_WRITE
);
3068 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3069 return nfs4_share_conflict(current_fh
,
3070 NFS4_SHARE_DENY_READ
);
3074 * Allow READ/WRITE during grace period on recovered state only for files
3075 * that are not able to provide mandatory locking.
3078 grace_disallows_io(struct inode
*inode
)
3080 return locks_in_grace() && mandatory_lock(inode
);
3083 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, int flags
)
3086 * When sessions are used the stateid generation number is ignored
3089 if ((flags
& HAS_SESSION
) && in
->si_generation
== 0)
3092 /* If the client sends us a stateid from the future, it's buggy: */
3093 if (in
->si_generation
> ref
->si_generation
)
3094 return nfserr_bad_stateid
;
3096 * The following, however, can happen. For example, if the
3097 * client sends an open and some IO at the same time, the open
3098 * may bump si_generation while the IO is still in flight.
3099 * Thanks to hard links and renames, the client never knows what
3100 * file an open will affect. So it could avoid that situation
3101 * only by serializing all opens and IO from the same open
3102 * owner. To recover from the old_stateid error, the client
3103 * will just have to retry the IO:
3105 if (in
->si_generation
< ref
->si_generation
)
3106 return nfserr_old_stateid
;
3111 static int is_delegation_stateid(stateid_t
*stateid
)
3113 return stateid
->si_fileid
== 0;
3117 * Checks for stateid operations
3120 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3121 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3123 struct nfs4_stateid
*stp
= NULL
;
3124 struct nfs4_delegation
*dp
= NULL
;
3125 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3126 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3132 if (grace_disallows_io(ino
))
3133 return nfserr_grace
;
3135 if (nfsd4_has_session(cstate
))
3136 flags
|= HAS_SESSION
;
3138 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3139 return check_special_stateids(current_fh
, stateid
, flags
);
3141 status
= nfserr_stale_stateid
;
3142 if (STALE_STATEID(stateid
))
3146 * We assume that any stateid that has the current boot time,
3147 * but that we can't find, is expired:
3149 status
= nfserr_expired
;
3150 if (is_delegation_stateid(stateid
)) {
3151 dp
= find_delegation_stateid(ino
, stateid
);
3154 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
,
3158 status
= nfs4_check_delegmode(dp
, flags
);
3161 renew_client(dp
->dl_client
);
3163 *filpp
= dp
->dl_file
->fi_deleg_file
;
3166 } else { /* open or lock stateid */
3167 stp
= find_stateid(stateid
, flags
);
3170 status
= nfserr_bad_stateid
;
3171 if (nfs4_check_fh(current_fh
, stp
))
3173 if (!stp
->st_stateowner
->so_confirmed
)
3175 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3179 status
= nfs4_check_openmode(stp
, flags
);
3182 renew_client(stp
->st_stateowner
->so_client
);
3184 if (flags
& RD_STATE
)
3185 *filpp
= find_readable_file(stp
->st_file
);
3187 *filpp
= find_writeable_file(stp
->st_file
);
3198 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3199 RD_STATE
: WR_STATE
;
3203 * Checks for sequence id mutating operations.
3206 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3207 stateid_t
*stateid
, int flags
,
3208 struct nfs4_stateowner
**sopp
,
3209 struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
3211 struct nfs4_stateid
*stp
;
3212 struct nfs4_stateowner
*sop
;
3213 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3216 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3217 seqid
, STATEID_VAL(stateid
));
3222 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
3223 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
3224 return nfserr_bad_stateid
;
3227 if (STALE_STATEID(stateid
))
3228 return nfserr_stale_stateid
;
3230 if (nfsd4_has_session(cstate
))
3231 flags
|= HAS_SESSION
;
3234 * We return BAD_STATEID if filehandle doesn't match stateid,
3235 * the confirmed flag is incorrecly set, or the generation
3236 * number is incorrect.
3238 stp
= find_stateid(stateid
, flags
);
3241 * Also, we should make sure this isn't just the result of
3244 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
3245 /* It's not stale; let's assume it's expired: */
3247 return nfserr_expired
;
3253 *sopp
= sop
= stp
->st_stateowner
;
3256 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
3257 struct nfs4_client
*clp
= sop
->so_client
;
3261 lkflg
= setlkflg(lock
->lk_type
);
3263 if (lock
->lk_is_new
) {
3264 if (!sop
->so_is_open_owner
)
3265 return nfserr_bad_stateid
;
3266 if (!(flags
& HAS_SESSION
) &&
3267 !same_clid(&clp
->cl_clientid
, lockclid
))
3268 return nfserr_bad_stateid
;
3269 /* stp is the open stateid */
3270 status
= nfs4_check_openmode(stp
, lkflg
);
3274 /* stp is the lock stateid */
3275 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
3281 if (nfs4_check_fh(current_fh
, stp
)) {
3282 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3283 return nfserr_bad_stateid
;
3287 * We now validate the seqid and stateid generation numbers.
3288 * For the moment, we ignore the possibility of
3289 * generation number wraparound.
3291 if (!(flags
& HAS_SESSION
) && seqid
!= sop
->so_seqid
)
3294 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
3295 dprintk("NFSD: preprocess_seqid_op: expected"
3296 " unconfirmed stateowner!\n");
3297 return nfserr_bad_stateid
;
3299 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
3300 dprintk("NFSD: preprocess_seqid_op: stateowner not"
3301 " confirmed yet!\n");
3302 return nfserr_bad_stateid
;
3304 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, flags
);
3307 renew_client(sop
->so_client
);
3311 if (seqid
== sop
->so_seqid
- 1) {
3312 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
3313 /* indicate replay to calling function */
3314 return nfserr_replay_me
;
3316 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
3317 sop
->so_seqid
, seqid
);
3319 return nfserr_bad_seqid
;
3323 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3324 struct nfsd4_open_confirm
*oc
)
3327 struct nfs4_stateowner
*sop
;
3328 struct nfs4_stateid
*stp
;
3330 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3331 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3332 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3334 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3340 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3341 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3342 CONFIRM
| OPEN_STATE
,
3343 &oc
->oc_stateowner
, &stp
, NULL
)))
3346 sop
= oc
->oc_stateowner
;
3347 sop
->so_confirmed
= 1;
3348 update_stateid(&stp
->st_stateid
);
3349 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3350 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3351 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3353 nfsd4_create_clid_dir(sop
->so_client
);
3355 if (oc
->oc_stateowner
) {
3356 nfs4_get_stateowner(oc
->oc_stateowner
);
3357 cstate
->replay_owner
= oc
->oc_stateowner
;
3359 nfs4_unlock_state();
3365 * unset all bits in union bitmap (bmap) that
3366 * do not exist in share (from successful OPEN_DOWNGRADE)
3369 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
3372 for (i
= 1; i
< 4; i
++) {
3373 if ((i
& access
) != i
)
3374 __clear_bit(i
, bmap
);
3379 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3382 for (i
= 0; i
< 4; i
++) {
3383 if ((i
& deny
) != i
)
3384 __clear_bit(i
, bmap
);
3389 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3390 struct nfsd4_compound_state
*cstate
,
3391 struct nfsd4_open_downgrade
*od
)
3394 struct nfs4_stateid
*stp
;
3395 unsigned int share_access
;
3397 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3398 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3399 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3401 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3402 || !deny_valid(od
->od_share_deny
))
3403 return nfserr_inval
;
3406 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3410 &od
->od_stateowner
, &stp
, NULL
)))
3413 status
= nfserr_inval
;
3414 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3415 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3416 stp
->st_access_bmap
, od
->od_share_access
);
3419 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3420 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3421 stp
->st_deny_bmap
, od
->od_share_deny
);
3424 set_access(&share_access
, stp
->st_access_bmap
);
3425 nfs4_file_downgrade(stp
->st_file
, share_access
& ~od
->od_share_access
);
3427 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
3428 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3430 update_stateid(&stp
->st_stateid
);
3431 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3434 if (od
->od_stateowner
) {
3435 nfs4_get_stateowner(od
->od_stateowner
);
3436 cstate
->replay_owner
= od
->od_stateowner
;
3438 nfs4_unlock_state();
3443 * nfs4_unlock_state() called after encode
3446 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3447 struct nfsd4_close
*close
)
3450 struct nfs4_stateid
*stp
;
3452 dprintk("NFSD: nfsd4_close on file %.*s\n",
3453 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3454 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3457 /* check close_lru for replay */
3458 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3461 OPEN_STATE
| CLOSE_STATE
,
3462 &close
->cl_stateowner
, &stp
, NULL
)))
3465 update_stateid(&stp
->st_stateid
);
3466 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3468 /* release_stateid() calls nfsd_close() if needed */
3469 release_open_stateid(stp
);
3471 /* place unused nfs4_stateowners on so_close_lru list to be
3472 * released by the laundromat service after the lease period
3473 * to enable us to handle CLOSE replay
3475 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3476 move_to_close_lru(close
->cl_stateowner
);
3478 if (close
->cl_stateowner
) {
3479 nfs4_get_stateowner(close
->cl_stateowner
);
3480 cstate
->replay_owner
= close
->cl_stateowner
;
3482 nfs4_unlock_state();
3487 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3488 struct nfsd4_delegreturn
*dr
)
3490 struct nfs4_delegation
*dp
;
3491 stateid_t
*stateid
= &dr
->dr_stateid
;
3492 struct inode
*inode
;
3496 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3498 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3500 if (nfsd4_has_session(cstate
))
3501 flags
|= HAS_SESSION
;
3503 status
= nfserr_bad_stateid
;
3504 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3506 status
= nfserr_stale_stateid
;
3507 if (STALE_STATEID(stateid
))
3509 status
= nfserr_bad_stateid
;
3510 if (!is_delegation_stateid(stateid
))
3512 status
= nfserr_expired
;
3513 dp
= find_delegation_stateid(inode
, stateid
);
3516 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, flags
);
3519 renew_client(dp
->dl_client
);
3521 unhash_delegation(dp
);
3523 nfs4_unlock_state();
3530 * Lock owner state (byte-range locks)
3532 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3533 #define LOCK_HASH_BITS 8
3534 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3535 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3538 end_offset(u64 start
, u64 len
)
3543 return end
>= start
? end
: NFS4_MAX_UINT64
;
3546 /* last octet in a range */
3548 last_byte_offset(u64 start
, u64 len
)
3554 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3557 #define lockownerid_hashval(id) \
3558 ((id) & LOCK_HASH_MASK)
3560 static inline unsigned int
3561 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3562 struct xdr_netobj
*ownername
)
3564 return (file_hashval(inode
) + cl_id
3565 + opaque_hashval(ownername
->data
, ownername
->len
))
3569 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3570 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3571 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3573 static struct nfs4_stateid
*
3574 find_stateid(stateid_t
*stid
, int flags
)
3576 struct nfs4_stateid
*local
;
3577 u32 st_id
= stid
->si_stateownerid
;
3578 u32 f_id
= stid
->si_fileid
;
3579 unsigned int hashval
;
3581 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3582 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3583 hashval
= stateid_hashval(st_id
, f_id
);
3584 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3585 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3586 (local
->st_stateid
.si_fileid
== f_id
))
3591 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3592 hashval
= stateid_hashval(st_id
, f_id
);
3593 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3594 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3595 (local
->st_stateid
.si_fileid
== f_id
))
3602 static struct nfs4_delegation
*
3603 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3605 struct nfs4_file
*fp
;
3606 struct nfs4_delegation
*dl
;
3608 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3611 fp
= find_file(ino
);
3614 dl
= find_delegation_file(fp
, stid
);
3620 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3621 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3622 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3623 * locking, this prevents us from being completely protocol-compliant. The
3624 * real solution to this problem is to start using unsigned file offsets in
3625 * the VFS, but this is a very deep change!
3628 nfs4_transform_lock_offset(struct file_lock
*lock
)
3630 if (lock
->fl_start
< 0)
3631 lock
->fl_start
= OFFSET_MAX
;
3632 if (lock
->fl_end
< 0)
3633 lock
->fl_end
= OFFSET_MAX
;
3636 /* Hack!: For now, we're defining this just so we can use a pointer to it
3637 * as a unique cookie to identify our (NFSv4's) posix locks. */
3638 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3642 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3644 struct nfs4_stateowner
*sop
;
3646 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3647 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3648 kref_get(&sop
->so_ref
);
3650 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3652 deny
->ld_sop
= NULL
;
3653 deny
->ld_clientid
.cl_boot
= 0;
3654 deny
->ld_clientid
.cl_id
= 0;
3656 deny
->ld_start
= fl
->fl_start
;
3657 deny
->ld_length
= NFS4_MAX_UINT64
;
3658 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3659 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3660 deny
->ld_type
= NFS4_READ_LT
;
3661 if (fl
->fl_type
!= F_RDLCK
)
3662 deny
->ld_type
= NFS4_WRITE_LT
;
3665 static struct nfs4_stateowner
*
3666 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3667 struct xdr_netobj
*owner
)
3669 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3670 struct nfs4_stateowner
*op
;
3672 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3673 if (same_owner_str(op
, owner
, clid
))
3680 * Alloc a lock owner structure.
3681 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3684 * strhashval = lock_ownerstr_hashval
3687 static struct nfs4_stateowner
*
3688 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3689 struct nfs4_stateowner
*sop
;
3690 struct nfs4_replay
*rp
;
3691 unsigned int idhashval
;
3693 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
3695 idhashval
= lockownerid_hashval(current_ownerid
);
3696 INIT_LIST_HEAD(&sop
->so_idhash
);
3697 INIT_LIST_HEAD(&sop
->so_strhash
);
3698 INIT_LIST_HEAD(&sop
->so_perclient
);
3699 INIT_LIST_HEAD(&sop
->so_stateids
);
3700 INIT_LIST_HEAD(&sop
->so_perstateid
);
3701 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
3703 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3704 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3705 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3706 sop
->so_is_open_owner
= 0;
3707 sop
->so_id
= current_ownerid
++;
3708 sop
->so_client
= clp
;
3709 /* It is the openowner seqid that will be incremented in encode in the
3710 * case of new lockowners; so increment the lock seqid manually: */
3711 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3712 sop
->so_confirmed
= 1;
3713 rp
= &sop
->so_replay
;
3714 rp
->rp_status
= nfserr_serverfault
;
3716 rp
->rp_buf
= rp
->rp_ibuf
;
3720 static struct nfs4_stateid
*
3721 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3723 struct nfs4_stateid
*stp
;
3724 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3726 stp
= nfs4_alloc_stateid();
3729 INIT_LIST_HEAD(&stp
->st_hash
);
3730 INIT_LIST_HEAD(&stp
->st_perfile
);
3731 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3732 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3733 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3734 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3735 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3736 stp
->st_stateowner
= sop
;
3739 stp
->st_stateid
.si_boot
= boot_time
;
3740 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3741 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3742 stp
->st_stateid
.si_generation
= 0;
3743 stp
->st_access_bmap
= 0;
3744 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3745 stp
->st_openstp
= open_stp
;
3752 check_lock_length(u64 offset
, u64 length
)
3754 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3755 LOFF_OVERFLOW(offset
, length
)));
3758 static void get_lock_access(struct nfs4_stateid
*lock_stp
, u32 access
)
3760 struct nfs4_file
*fp
= lock_stp
->st_file
;
3761 int oflag
= nfs4_access_to_omode(access
);
3763 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3765 nfs4_file_get_access(fp
, oflag
);
3766 __set_bit(access
, &lock_stp
->st_access_bmap
);
3773 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3774 struct nfsd4_lock
*lock
)
3776 struct nfs4_stateowner
*open_sop
= NULL
;
3777 struct nfs4_stateowner
*lock_sop
= NULL
;
3778 struct nfs4_stateid
*lock_stp
;
3779 struct nfs4_file
*fp
;
3780 struct file
*filp
= NULL
;
3781 struct file_lock file_lock
;
3782 struct file_lock conflock
;
3784 unsigned int strhashval
;
3787 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3788 (long long) lock
->lk_offset
,
3789 (long long) lock
->lk_length
);
3791 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3792 return nfserr_inval
;
3794 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3795 S_IFREG
, NFSD_MAY_LOCK
))) {
3796 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3802 if (lock
->lk_is_new
) {
3804 * Client indicates that this is a new lockowner.
3805 * Use open owner and open stateid to create lock owner and
3808 struct nfs4_stateid
*open_stp
= NULL
;
3810 status
= nfserr_stale_clientid
;
3811 if (!nfsd4_has_session(cstate
) &&
3812 STALE_CLIENTID(&lock
->lk_new_clientid
))
3815 /* validate and update open stateid and open seqid */
3816 status
= nfs4_preprocess_seqid_op(cstate
,
3817 lock
->lk_new_open_seqid
,
3818 &lock
->lk_new_open_stateid
,
3820 &lock
->lk_replay_owner
, &open_stp
,
3824 open_sop
= lock
->lk_replay_owner
;
3825 /* create lockowner and lock stateid */
3826 fp
= open_stp
->st_file
;
3827 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3828 open_sop
->so_client
->cl_clientid
.cl_id
,
3829 &lock
->v
.new.owner
);
3830 /* XXX: Do we need to check for duplicate stateowners on
3831 * the same file, or should they just be allowed (and
3832 * create new stateids)? */
3833 status
= nfserr_resource
;
3834 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3835 open_sop
->so_client
, open_stp
, lock
);
3836 if (lock_sop
== NULL
)
3838 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3839 if (lock_stp
== NULL
)
3842 /* lock (lock owner + lock stateid) already exists */
3843 status
= nfs4_preprocess_seqid_op(cstate
,
3844 lock
->lk_old_lock_seqid
,
3845 &lock
->lk_old_lock_stateid
,
3847 &lock
->lk_replay_owner
, &lock_stp
, lock
);
3850 lock_sop
= lock
->lk_replay_owner
;
3851 fp
= lock_stp
->st_file
;
3853 /* lock->lk_replay_owner and lock_stp have been created or found */
3855 status
= nfserr_grace
;
3856 if (locks_in_grace() && !lock
->lk_reclaim
)
3858 status
= nfserr_no_grace
;
3859 if (!locks_in_grace() && lock
->lk_reclaim
)
3862 locks_init_lock(&file_lock
);
3863 switch (lock
->lk_type
) {
3866 filp
= find_readable_file(lock_stp
->st_file
);
3868 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
3869 file_lock
.fl_type
= F_RDLCK
;
3872 case NFS4_WRITEW_LT
:
3873 filp
= find_writeable_file(lock_stp
->st_file
);
3875 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
3876 file_lock
.fl_type
= F_WRLCK
;
3879 status
= nfserr_inval
;
3883 status
= nfserr_openmode
;
3886 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3887 file_lock
.fl_pid
= current
->tgid
;
3888 file_lock
.fl_file
= filp
;
3889 file_lock
.fl_flags
= FL_POSIX
;
3890 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3892 file_lock
.fl_start
= lock
->lk_offset
;
3893 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3894 nfs4_transform_lock_offset(&file_lock
);
3897 * Try to lock the file in the VFS.
3898 * Note: locks.c uses the BKL to protect the inode's lock list.
3901 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
3903 case 0: /* success! */
3904 update_stateid(&lock_stp
->st_stateid
);
3905 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
3909 case (EAGAIN
): /* conflock holds conflicting lock */
3910 status
= nfserr_denied
;
3911 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3912 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3915 status
= nfserr_deadlock
;
3918 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3919 status
= nfserr_resource
;
3923 if (status
&& lock
->lk_is_new
&& lock_sop
)
3924 release_lockowner(lock_sop
);
3925 if (lock
->lk_replay_owner
) {
3926 nfs4_get_stateowner(lock
->lk_replay_owner
);
3927 cstate
->replay_owner
= lock
->lk_replay_owner
;
3929 nfs4_unlock_state();
3934 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3935 * so we do a temporary open here just to get an open file to pass to
3936 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3939 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
3944 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
3947 err
= vfs_test_lock(file
, lock
);
3956 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3957 struct nfsd4_lockt
*lockt
)
3959 struct inode
*inode
;
3960 struct file_lock file_lock
;
3964 if (locks_in_grace())
3965 return nfserr_grace
;
3967 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
3968 return nfserr_inval
;
3970 lockt
->lt_stateowner
= NULL
;
3973 status
= nfserr_stale_clientid
;
3974 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
3977 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
3978 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
3979 if (status
== nfserr_symlink
)
3980 status
= nfserr_inval
;
3984 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3985 locks_init_lock(&file_lock
);
3986 switch (lockt
->lt_type
) {
3989 file_lock
.fl_type
= F_RDLCK
;
3992 case NFS4_WRITEW_LT
:
3993 file_lock
.fl_type
= F_WRLCK
;
3996 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
3997 status
= nfserr_inval
;
4001 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
4002 &lockt
->lt_clientid
, &lockt
->lt_owner
);
4003 if (lockt
->lt_stateowner
)
4004 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
4005 file_lock
.fl_pid
= current
->tgid
;
4006 file_lock
.fl_flags
= FL_POSIX
;
4008 file_lock
.fl_start
= lockt
->lt_offset
;
4009 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4011 nfs4_transform_lock_offset(&file_lock
);
4014 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4016 status
= nfserrno(error
);
4019 if (file_lock
.fl_type
!= F_UNLCK
) {
4020 status
= nfserr_denied
;
4021 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4024 nfs4_unlock_state();
4029 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4030 struct nfsd4_locku
*locku
)
4032 struct nfs4_stateid
*stp
;
4033 struct file
*filp
= NULL
;
4034 struct file_lock file_lock
;
4038 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4039 (long long) locku
->lu_offset
,
4040 (long long) locku
->lu_length
);
4042 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4043 return nfserr_inval
;
4047 if ((status
= nfs4_preprocess_seqid_op(cstate
,
4051 &locku
->lu_stateowner
, &stp
, NULL
)))
4054 filp
= find_any_file(stp
->st_file
);
4056 status
= nfserr_lock_range
;
4060 locks_init_lock(&file_lock
);
4061 file_lock
.fl_type
= F_UNLCK
;
4062 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
4063 file_lock
.fl_pid
= current
->tgid
;
4064 file_lock
.fl_file
= filp
;
4065 file_lock
.fl_flags
= FL_POSIX
;
4066 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4067 file_lock
.fl_start
= locku
->lu_offset
;
4069 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4070 nfs4_transform_lock_offset(&file_lock
);
4073 * Try to unlock the file in the VFS.
4075 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4077 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4081 * OK, unlock succeeded; the only thing left to do is update the stateid.
4083 update_stateid(&stp
->st_stateid
);
4084 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
4087 if (locku
->lu_stateowner
) {
4088 nfs4_get_stateowner(locku
->lu_stateowner
);
4089 cstate
->replay_owner
= locku
->lu_stateowner
;
4091 nfs4_unlock_state();
4095 status
= nfserrno(err
);
4101 * 1: locks held by lockowner
4102 * 0: no locks held by lockowner
4105 check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
)
4107 struct file_lock
**flpp
;
4108 struct inode
*inode
= filp
->fi_inode
;
4112 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4113 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4124 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4125 struct nfsd4_compound_state
*cstate
,
4126 struct nfsd4_release_lockowner
*rlockowner
)
4128 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4129 struct nfs4_stateowner
*sop
;
4130 struct nfs4_stateid
*stp
;
4131 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4132 struct list_head matches
;
4136 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4137 clid
->cl_boot
, clid
->cl_id
);
4139 /* XXX check for lease expiration */
4141 status
= nfserr_stale_clientid
;
4142 if (STALE_CLIENTID(clid
))
4147 status
= nfserr_locks_held
;
4148 /* XXX: we're doing a linear search through all the lockowners.
4149 * Yipes! For now we'll just hope clients aren't really using
4150 * release_lockowner much, but eventually we have to fix these
4151 * data structures. */
4152 INIT_LIST_HEAD(&matches
);
4153 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4154 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4155 if (!same_owner_str(sop
, owner
, clid
))
4157 list_for_each_entry(stp
, &sop
->so_stateids
,
4159 if (check_for_locks(stp
->st_file
, sop
))
4161 /* Note: so_perclient unused for lockowners,
4162 * so it's OK to fool with here. */
4163 list_add(&sop
->so_perclient
, &matches
);
4167 /* Clients probably won't expect us to return with some (but not all)
4168 * of the lockowner state released; so don't release any until all
4169 * have been checked. */
4171 while (!list_empty(&matches
)) {
4172 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
4174 /* unhash_stateowner deletes so_perclient only
4175 * for openowners. */
4176 list_del(&sop
->so_perclient
);
4177 release_lockowner(sop
);
4180 nfs4_unlock_state();
4184 static inline struct nfs4_client_reclaim
*
4187 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4191 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4193 unsigned int strhashval
= clientstr_hashval(name
);
4194 struct nfs4_client
*clp
;
4196 clp
= find_confirmed_client_by_str(name
, strhashval
);
4201 * failure => all reset bets are off, nfserr_no_grace...
4204 nfs4_client_to_reclaim(const char *name
)
4206 unsigned int strhashval
;
4207 struct nfs4_client_reclaim
*crp
= NULL
;
4209 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4210 crp
= alloc_reclaim();
4213 strhashval
= clientstr_hashval(name
);
4214 INIT_LIST_HEAD(&crp
->cr_strhash
);
4215 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4216 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4217 reclaim_str_hashtbl_size
++;
4222 nfs4_release_reclaim(void)
4224 struct nfs4_client_reclaim
*crp
= NULL
;
4227 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4228 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4229 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4230 struct nfs4_client_reclaim
, cr_strhash
);
4231 list_del(&crp
->cr_strhash
);
4233 reclaim_str_hashtbl_size
--;
4236 BUG_ON(reclaim_str_hashtbl_size
);
4240 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4241 static struct nfs4_client_reclaim
*
4242 nfs4_find_reclaim_client(clientid_t
*clid
)
4244 unsigned int strhashval
;
4245 struct nfs4_client
*clp
;
4246 struct nfs4_client_reclaim
*crp
= NULL
;
4249 /* find clientid in conf_id_hashtbl */
4250 clp
= find_confirmed_client(clid
);
4254 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4255 clp
->cl_name
.len
, clp
->cl_name
.data
,
4258 /* find clp->cl_name in reclaim_str_hashtbl */
4259 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4260 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4261 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4269 * Called from OPEN. Look for clientid in reclaim list.
4272 nfs4_check_open_reclaim(clientid_t
*clid
)
4274 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4277 /* initialization to perform at module load time: */
4280 nfs4_state_init(void)
4284 status
= nfsd4_init_slabs();
4287 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4288 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4289 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4290 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4291 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4292 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4294 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4295 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4296 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4297 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4299 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4300 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4301 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
4303 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
4304 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4305 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
4307 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4308 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4309 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4311 memset(&onestateid
, ~0, sizeof(stateid_t
));
4312 INIT_LIST_HEAD(&close_lru
);
4313 INIT_LIST_HEAD(&client_lru
);
4314 INIT_LIST_HEAD(&del_recall_lru
);
4315 reclaim_str_hashtbl_size
= 0;
4320 nfsd4_load_reboot_recovery_data(void)
4325 nfsd4_init_recdir(user_recovery_dirname
);
4326 status
= nfsd4_recdir_load();
4327 nfs4_unlock_state();
4329 printk("NFSD: Failure reading reboot recovery data\n");
4333 * Since the lifetime of a delegation isn't limited to that of an open, a
4334 * client may quite reasonably hang on to a delegation as long as it has
4335 * the inode cached. This becomes an obvious problem the first time a
4336 * client's inode cache approaches the size of the server's total memory.
4338 * For now we avoid this problem by imposing a hard limit on the number
4339 * of delegations, which varies according to the server's memory size.
4342 set_max_delegations(void)
4345 * Allow at most 4 delegations per megabyte of RAM. Quick
4346 * estimates suggest that in the worst case (where every delegation
4347 * is for a different inode), a delegation could take about 1.5K,
4348 * giving a worst case usage of about 6% of memory.
4350 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4353 /* initialization to perform when the nfsd service is started: */
4356 __nfs4_state_start(void)
4360 boot_time
= get_seconds();
4361 locks_start_grace(&nfsd4_manager
);
4362 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4364 ret
= set_callback_cred();
4367 laundry_wq
= create_singlethread_workqueue("nfsd4");
4368 if (laundry_wq
== NULL
)
4370 ret
= nfsd4_create_callback_queue();
4372 goto out_free_laundry
;
4373 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4374 set_max_delegations();
4377 destroy_workqueue(laundry_wq
);
4382 nfs4_state_start(void)
4384 nfsd4_load_reboot_recovery_data();
4385 return __nfs4_state_start();
4389 __nfs4_state_shutdown(void)
4392 struct nfs4_client
*clp
= NULL
;
4393 struct nfs4_delegation
*dp
= NULL
;
4394 struct list_head
*pos
, *next
, reaplist
;
4396 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4397 while (!list_empty(&conf_id_hashtbl
[i
])) {
4398 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4401 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4402 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4406 INIT_LIST_HEAD(&reaplist
);
4407 spin_lock(&recall_lock
);
4408 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4409 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4410 list_move(&dp
->dl_recall_lru
, &reaplist
);
4412 spin_unlock(&recall_lock
);
4413 list_for_each_safe(pos
, next
, &reaplist
) {
4414 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4415 list_del_init(&dp
->dl_recall_lru
);
4416 unhash_delegation(dp
);
4419 nfsd4_shutdown_recdir();
4423 nfs4_state_shutdown(void)
4425 cancel_delayed_work_sync(&laundromat_work
);
4426 destroy_workqueue(laundry_wq
);
4427 locks_end_grace(&nfsd4_manager
);
4429 nfs4_release_reclaim();
4430 __nfs4_state_shutdown();
4431 nfs4_unlock_state();
4432 nfsd4_destroy_callback_queue();
4436 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4437 * accessed when nfsd is starting.
4440 nfs4_set_recdir(char *recdir
)
4442 strcpy(user_recovery_dirname
, recdir
);
4446 * Change the NFSv4 recovery directory to recdir.
4449 nfs4_reset_recoverydir(char *recdir
)
4454 status
= kern_path(recdir
, LOOKUP_FOLLOW
, &path
);
4458 if (S_ISDIR(path
.dentry
->d_inode
->i_mode
)) {
4459 nfs4_set_recdir(recdir
);
4467 nfs4_recoverydir(void)
4469 return user_recovery_dirname
;