2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
42 #include <linux/sunrpc/clnt.h>
46 #define NFSDDBG_FACILITY NFSDDBG_PROC
49 time_t nfsd4_lease
= 90; /* default lease time */
50 time_t nfsd4_grace
= 90;
51 static time_t boot_time
;
52 static u32 current_ownerid
= 1;
53 static u32 current_fileid
= 1;
54 static u32 current_delegid
= 1;
55 static stateid_t zerostateid
; /* bits all 0 */
56 static stateid_t onestateid
; /* bits all 1 */
57 static u64 current_sessionid
= 1;
59 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
60 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
62 /* forward declarations */
63 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
64 static struct nfs4_stateid
* search_for_stateid(stateid_t
*stid
);
65 static struct nfs4_delegation
* search_for_delegation(stateid_t
*stid
);
66 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
67 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
);
71 /* Currently used for almost all code touching nfsv4 state: */
72 static DEFINE_MUTEX(client_mutex
);
75 * Currently used for the del_recall_lru and file hash table. In an
76 * effort to decrease the scope of the client_mutex, this spinlock may
77 * eventually cover more:
79 static DEFINE_SPINLOCK(recall_lock
);
81 static struct kmem_cache
*stateowner_slab
= NULL
;
82 static struct kmem_cache
*file_slab
= NULL
;
83 static struct kmem_cache
*stateid_slab
= NULL
;
84 static struct kmem_cache
*deleg_slab
= NULL
;
89 mutex_lock(&client_mutex
);
93 nfs4_unlock_state(void)
95 mutex_unlock(&client_mutex
);
99 opaque_hashval(const void *ptr
, int nbytes
)
101 unsigned char *cptr
= (unsigned char *) ptr
;
111 static struct list_head del_recall_lru
;
114 put_nfs4_file(struct nfs4_file
*fi
)
116 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
117 list_del(&fi
->fi_hash
);
118 spin_unlock(&recall_lock
);
120 kmem_cache_free(file_slab
, fi
);
125 get_nfs4_file(struct nfs4_file
*fi
)
127 atomic_inc(&fi
->fi_ref
);
130 static int num_delegations
;
131 unsigned int max_delegations
;
134 * Open owner state (share locks)
137 /* hash tables for open owners */
138 #define OPEN_OWNER_HASH_BITS 8
139 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
140 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
142 static unsigned int open_ownerid_hashval(const u32 id
)
144 return id
& OPEN_OWNER_HASH_MASK
;
147 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
151 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
153 return ret
& OPEN_OWNER_HASH_MASK
;
156 static struct list_head open_ownerid_hashtbl
[OPEN_OWNER_HASH_SIZE
];
157 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
159 /* hash table for nfs4_file */
160 #define FILE_HASH_BITS 8
161 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
163 /* hash table for (open)nfs4_stateid */
164 #define STATEID_HASH_BITS 10
165 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
166 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
168 static unsigned int file_hashval(struct inode
*ino
)
170 /* XXX: why are we hashing on inode pointer, anyway? */
171 return hash_ptr(ino
, FILE_HASH_BITS
);
174 static unsigned int stateid_hashval(u32 owner_id
, u32 file_id
)
176 return (owner_id
+ file_id
) & STATEID_HASH_MASK
;
179 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
180 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
182 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
184 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
185 atomic_inc(&fp
->fi_access
[oflag
]);
188 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
190 if (oflag
== O_RDWR
) {
191 __nfs4_file_get_access(fp
, O_RDONLY
);
192 __nfs4_file_get_access(fp
, O_WRONLY
);
194 __nfs4_file_get_access(fp
, oflag
);
197 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
199 if (fp
->fi_fds
[oflag
]) {
200 fput(fp
->fi_fds
[oflag
]);
201 fp
->fi_fds
[oflag
] = NULL
;
205 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
207 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
208 nfs4_file_put_fd(fp
, O_RDWR
);
209 nfs4_file_put_fd(fp
, oflag
);
213 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
215 if (oflag
== O_RDWR
) {
216 __nfs4_file_put_access(fp
, O_RDONLY
);
217 __nfs4_file_put_access(fp
, O_WRONLY
);
219 __nfs4_file_put_access(fp
, oflag
);
222 static struct nfs4_delegation
*
223 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
225 struct nfs4_delegation
*dp
;
226 struct nfs4_file
*fp
= stp
->st_file
;
228 dprintk("NFSD alloc_init_deleg\n");
230 * Major work on the lease subsystem (for example, to support
231 * calbacks on stat) will be required before we can support
232 * write delegations properly.
234 if (type
!= NFS4_OPEN_DELEGATE_READ
)
236 if (fp
->fi_had_conflict
)
238 if (num_delegations
> max_delegations
)
240 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
244 INIT_LIST_HEAD(&dp
->dl_perfile
);
245 INIT_LIST_HEAD(&dp
->dl_perclnt
);
246 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
251 dp
->dl_stateid
.si_boot
= boot_time
;
252 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
253 dp
->dl_stateid
.si_fileid
= 0;
254 dp
->dl_stateid
.si_generation
= 0;
255 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
257 atomic_set(&dp
->dl_count
, 1);
258 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
263 nfs4_put_delegation(struct nfs4_delegation
*dp
)
265 if (atomic_dec_and_test(&dp
->dl_count
)) {
266 dprintk("NFSD: freeing dp %p\n",dp
);
267 put_nfs4_file(dp
->dl_file
);
268 kmem_cache_free(deleg_slab
, dp
);
273 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
275 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
276 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
278 fput(fp
->fi_deleg_file
);
279 fp
->fi_deleg_file
= NULL
;
283 /* Called under the state lock. */
285 unhash_delegation(struct nfs4_delegation
*dp
)
287 list_del_init(&dp
->dl_perclnt
);
288 spin_lock(&recall_lock
);
289 list_del_init(&dp
->dl_perfile
);
290 list_del_init(&dp
->dl_recall_lru
);
291 spin_unlock(&recall_lock
);
292 nfs4_put_deleg_lease(dp
->dl_file
);
293 nfs4_put_delegation(dp
);
300 /* client_lock protects the client lru list and session hash table */
301 static DEFINE_SPINLOCK(client_lock
);
303 /* Hash tables for nfs4_clientid state */
304 #define CLIENT_HASH_BITS 4
305 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
306 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
308 static unsigned int clientid_hashval(u32 id
)
310 return id
& CLIENT_HASH_MASK
;
313 static unsigned int clientstr_hashval(const char *name
)
315 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
319 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
320 * used in reboot/reset lease grace period processing
322 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
323 * setclientid_confirmed info.
325 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
328 * client_lru holds client queue ordered by nfs4_client.cl_time
331 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
332 * for last close replay.
334 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
335 static int reclaim_str_hashtbl_size
= 0;
336 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
337 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
338 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
339 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
340 static struct list_head client_lru
;
341 static struct list_head close_lru
;
344 * We store the NONE, READ, WRITE, and BOTH bits separately in the
345 * st_{access,deny}_bmap field of the stateid, in order to track not
346 * only what share bits are currently in force, but also what
347 * combinations of share bits previous opens have used. This allows us
348 * to enforce the recommendation of rfc 3530 14.2.19 that the server
349 * return an error if the client attempt to downgrade to a combination
350 * of share bits not explicable by closing some of its previous opens.
352 * XXX: This enforcement is actually incomplete, since we don't keep
353 * track of access/deny bit combinations; so, e.g., we allow:
355 * OPEN allow read, deny write
356 * OPEN allow both, deny none
357 * DOWNGRADE allow read, deny none
359 * which we should reject.
362 set_access(unsigned int *access
, unsigned long bmap
) {
366 for (i
= 1; i
< 4; i
++) {
367 if (test_bit(i
, &bmap
))
373 set_deny(unsigned int *deny
, unsigned long bmap
) {
377 for (i
= 0; i
< 4; i
++) {
378 if (test_bit(i
, &bmap
))
384 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
385 unsigned int access
, deny
;
387 set_access(&access
, stp
->st_access_bmap
);
388 set_deny(&deny
, stp
->st_deny_bmap
);
389 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
394 static int nfs4_access_to_omode(u32 access
)
396 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
397 case NFS4_SHARE_ACCESS_READ
:
399 case NFS4_SHARE_ACCESS_WRITE
:
401 case NFS4_SHARE_ACCESS_BOTH
:
407 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
409 list_del(&stp
->st_hash
);
410 list_del(&stp
->st_perfile
);
411 list_del(&stp
->st_perstateowner
);
414 static void free_generic_stateid(struct nfs4_stateid
*stp
)
418 if (stp
->st_access_bmap
) {
419 for (i
= 1; i
< 4; i
++) {
420 if (test_bit(i
, &stp
->st_access_bmap
))
421 nfs4_file_put_access(stp
->st_file
,
422 nfs4_access_to_omode(i
));
425 put_nfs4_file(stp
->st_file
);
426 kmem_cache_free(stateid_slab
, stp
);
429 static void release_lock_stateid(struct nfs4_stateid
*stp
)
433 unhash_generic_stateid(stp
);
434 file
= find_any_file(stp
->st_file
);
436 locks_remove_posix(file
, (fl_owner_t
)stp
->st_stateowner
);
437 free_generic_stateid(stp
);
440 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
442 struct nfs4_stateid
*stp
;
444 list_del(&sop
->so_idhash
);
445 list_del(&sop
->so_strhash
);
446 list_del(&sop
->so_perstateid
);
447 while (!list_empty(&sop
->so_stateids
)) {
448 stp
= list_first_entry(&sop
->so_stateids
,
449 struct nfs4_stateid
, st_perstateowner
);
450 release_lock_stateid(stp
);
454 static void release_lockowner(struct nfs4_stateowner
*sop
)
456 unhash_lockowner(sop
);
457 nfs4_put_stateowner(sop
);
461 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
463 struct nfs4_stateowner
*lock_sop
;
465 while (!list_empty(&open_stp
->st_lockowners
)) {
466 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
467 struct nfs4_stateowner
, so_perstateid
);
468 /* list_del(&open_stp->st_lockowners); */
469 BUG_ON(lock_sop
->so_is_open_owner
);
470 release_lockowner(lock_sop
);
474 static void release_open_stateid(struct nfs4_stateid
*stp
)
476 unhash_generic_stateid(stp
);
477 release_stateid_lockowners(stp
);
478 free_generic_stateid(stp
);
481 static void unhash_openowner(struct nfs4_stateowner
*sop
)
483 struct nfs4_stateid
*stp
;
485 list_del(&sop
->so_idhash
);
486 list_del(&sop
->so_strhash
);
487 list_del(&sop
->so_perclient
);
488 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
489 while (!list_empty(&sop
->so_stateids
)) {
490 stp
= list_first_entry(&sop
->so_stateids
,
491 struct nfs4_stateid
, st_perstateowner
);
492 release_open_stateid(stp
);
496 static void release_openowner(struct nfs4_stateowner
*sop
)
498 unhash_openowner(sop
);
499 list_del(&sop
->so_close_lru
);
500 nfs4_put_stateowner(sop
);
503 #define SESSION_HASH_SIZE 512
504 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
507 hash_sessionid(struct nfs4_sessionid
*sessionid
)
509 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
511 return sid
->sequence
% SESSION_HASH_SIZE
;
515 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
517 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
518 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
522 gen_sessionid(struct nfsd4_session
*ses
)
524 struct nfs4_client
*clp
= ses
->se_client
;
525 struct nfsd4_sessionid
*sid
;
527 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
528 sid
->clientid
= clp
->cl_clientid
;
529 sid
->sequence
= current_sessionid
++;
534 * The protocol defines ca_maxresponssize_cached to include the size of
535 * the rpc header, but all we need to cache is the data starting after
536 * the end of the initial SEQUENCE operation--the rest we regenerate
537 * each time. Therefore we can advertise a ca_maxresponssize_cached
538 * value that is the number of bytes in our cache plus a few additional
539 * bytes. In order to stay on the safe side, and not promise more than
540 * we can cache, those additional bytes must be the minimum possible: 24
541 * bytes of rpc header (xid through accept state, with AUTH_NULL
542 * verifier), 12 for the compound header (with zero-length tag), and 44
543 * for the SEQUENCE op response:
545 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
548 free_session_slots(struct nfsd4_session
*ses
)
552 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
553 kfree(ses
->se_slots
[i
]);
557 * We don't actually need to cache the rpc and session headers, so we
558 * can allocate a little less for each slot:
560 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
562 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
565 static int nfsd4_sanitize_slot_size(u32 size
)
567 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
568 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
574 * XXX: If we run out of reserved DRC memory we could (up to a point)
575 * re-negotiate active sessions and reduce their slot usage to make
576 * rooom for new connections. For now we just fail the create session.
578 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
582 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
584 spin_lock(&nfsd_drc_lock
);
585 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
586 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
587 num
= min_t(int, num
, avail
/ slotsize
);
588 nfsd_drc_mem_used
+= num
* slotsize
;
589 spin_unlock(&nfsd_drc_lock
);
594 static void nfsd4_put_drc_mem(int slotsize
, int num
)
596 spin_lock(&nfsd_drc_lock
);
597 nfsd_drc_mem_used
-= slotsize
* num
;
598 spin_unlock(&nfsd_drc_lock
);
601 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
603 struct nfsd4_session
*new;
606 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
607 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
608 mem
= numslots
* sizeof(struct nfsd4_slot
*);
610 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
613 /* allocate each struct nfsd4_slot and data cache in one piece */
614 for (i
= 0; i
< numslots
; i
++) {
615 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
616 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
617 if (!new->se_slots
[i
])
623 kfree(new->se_slots
[i
]);
628 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
630 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
632 new->maxreqs
= numslots
;
633 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
634 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
635 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
636 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
637 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
640 static void free_conn(struct nfsd4_conn
*c
)
642 svc_xprt_put(c
->cn_xprt
);
646 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
648 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
649 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
651 spin_lock(&clp
->cl_lock
);
652 if (!list_empty(&c
->cn_persession
)) {
653 list_del(&c
->cn_persession
);
656 spin_unlock(&clp
->cl_lock
);
657 nfsd4_probe_callback(clp
);
660 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
662 struct nfsd4_conn
*conn
;
664 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
667 svc_xprt_get(rqstp
->rq_xprt
);
668 conn
->cn_xprt
= rqstp
->rq_xprt
;
669 conn
->cn_flags
= flags
;
670 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
674 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
676 conn
->cn_session
= ses
;
677 list_add(&conn
->cn_persession
, &ses
->se_conns
);
680 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
682 struct nfs4_client
*clp
= ses
->se_client
;
684 spin_lock(&clp
->cl_lock
);
685 __nfsd4_hash_conn(conn
, ses
);
686 spin_unlock(&clp
->cl_lock
);
689 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
691 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
692 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
695 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
697 struct nfsd4_conn
*conn
;
700 conn
= alloc_conn(rqstp
, dir
);
702 return nfserr_jukebox
;
703 nfsd4_hash_conn(conn
, ses
);
704 ret
= nfsd4_register_conn(conn
);
706 /* oops; xprt is already down: */
707 nfsd4_conn_lost(&conn
->cn_xpt_user
);
711 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
713 u32 dir
= NFS4_CDFC4_FORE
;
715 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
716 dir
|= NFS4_CDFC4_BACK
;
718 return nfsd4_new_conn(rqstp
, ses
, dir
);
721 /* must be called under client_lock */
722 static void nfsd4_del_conns(struct nfsd4_session
*s
)
724 struct nfs4_client
*clp
= s
->se_client
;
725 struct nfsd4_conn
*c
;
727 spin_lock(&clp
->cl_lock
);
728 while (!list_empty(&s
->se_conns
)) {
729 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
730 list_del_init(&c
->cn_persession
);
731 spin_unlock(&clp
->cl_lock
);
733 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
736 spin_lock(&clp
->cl_lock
);
738 spin_unlock(&clp
->cl_lock
);
741 void free_session(struct kref
*kref
)
743 struct nfsd4_session
*ses
;
746 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
747 nfsd4_del_conns(ses
);
748 spin_lock(&nfsd_drc_lock
);
749 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
750 nfsd_drc_mem_used
-= mem
;
751 spin_unlock(&nfsd_drc_lock
);
752 free_session_slots(ses
);
756 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
758 struct nfsd4_session
*new;
759 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
760 int numslots
, slotsize
;
765 * Note decreasing slot size below client's request may
766 * make it difficult for client to function correctly, whereas
767 * decreasing the number of slots will (just?) affect
768 * performance. When short on memory we therefore prefer to
769 * decrease number of slots instead of their size.
771 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
772 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
776 new = alloc_session(slotsize
, numslots
);
778 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
781 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
783 new->se_client
= clp
;
786 INIT_LIST_HEAD(&new->se_conns
);
788 new->se_cb_seq_nr
= 1;
789 new->se_flags
= cses
->flags
;
790 new->se_cb_prog
= cses
->callback_prog
;
791 kref_init(&new->se_ref
);
792 idx
= hash_sessionid(&new->se_sessionid
);
793 spin_lock(&client_lock
);
794 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
795 spin_lock(&clp
->cl_lock
);
796 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
797 spin_unlock(&clp
->cl_lock
);
798 spin_unlock(&client_lock
);
800 status
= nfsd4_new_conn_from_crses(rqstp
, new);
801 /* whoops: benny points out, status is ignored! (err, or bogus) */
803 free_session(&new->se_ref
);
806 if (cses
->flags
& SESSION4_BACK_CHAN
) {
807 struct sockaddr
*sa
= svc_addr(rqstp
);
809 * This is a little silly; with sessions there's no real
810 * use for the callback address. Use the peer address
811 * as a reasonable default for now, but consider fixing
812 * the rpc client not to require an address in the
815 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
816 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
818 nfsd4_probe_callback(clp
);
822 /* caller must hold client_lock */
823 static struct nfsd4_session
*
824 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
826 struct nfsd4_session
*elem
;
829 dump_sessionid(__func__
, sessionid
);
830 idx
= hash_sessionid(sessionid
);
831 /* Search in the appropriate list */
832 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
833 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
834 NFS4_MAX_SESSIONID_LEN
)) {
839 dprintk("%s: session not found\n", __func__
);
843 /* caller must hold client_lock */
845 unhash_session(struct nfsd4_session
*ses
)
847 list_del(&ses
->se_hash
);
848 spin_lock(&ses
->se_client
->cl_lock
);
849 list_del(&ses
->se_perclnt
);
850 spin_unlock(&ses
->se_client
->cl_lock
);
853 /* must be called under the client_lock */
855 renew_client_locked(struct nfs4_client
*clp
)
857 if (is_client_expired(clp
)) {
858 dprintk("%s: client (clientid %08x/%08x) already expired\n",
860 clp
->cl_clientid
.cl_boot
,
861 clp
->cl_clientid
.cl_id
);
866 * Move client to the end to the LRU list.
868 dprintk("renewing client (clientid %08x/%08x)\n",
869 clp
->cl_clientid
.cl_boot
,
870 clp
->cl_clientid
.cl_id
);
871 list_move_tail(&clp
->cl_lru
, &client_lru
);
872 clp
->cl_time
= get_seconds();
876 renew_client(struct nfs4_client
*clp
)
878 spin_lock(&client_lock
);
879 renew_client_locked(clp
);
880 spin_unlock(&client_lock
);
883 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
885 STALE_CLIENTID(clientid_t
*clid
)
887 if (clid
->cl_boot
== boot_time
)
889 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
890 clid
->cl_boot
, clid
->cl_id
, boot_time
);
895 * XXX Should we use a slab cache ?
896 * This type of memory management is somewhat inefficient, but we use it
897 * anyway since SETCLIENTID is not a common operation.
899 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
901 struct nfs4_client
*clp
;
903 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
906 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
907 if (clp
->cl_name
.data
== NULL
) {
911 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
912 clp
->cl_name
.len
= name
.len
;
917 free_client(struct nfs4_client
*clp
)
919 while (!list_empty(&clp
->cl_sessions
)) {
920 struct nfsd4_session
*ses
;
921 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
923 list_del(&ses
->se_perclnt
);
924 nfsd4_put_session(ses
);
926 if (clp
->cl_cred
.cr_group_info
)
927 put_group_info(clp
->cl_cred
.cr_group_info
);
928 kfree(clp
->cl_principal
);
929 kfree(clp
->cl_name
.data
);
934 release_session_client(struct nfsd4_session
*session
)
936 struct nfs4_client
*clp
= session
->se_client
;
938 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
940 if (is_client_expired(clp
)) {
942 session
->se_client
= NULL
;
944 renew_client_locked(clp
);
945 spin_unlock(&client_lock
);
948 /* must be called under the client_lock */
950 unhash_client_locked(struct nfs4_client
*clp
)
952 struct nfsd4_session
*ses
;
954 mark_client_expired(clp
);
955 list_del(&clp
->cl_lru
);
956 spin_lock(&clp
->cl_lock
);
957 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
958 list_del_init(&ses
->se_hash
);
959 spin_unlock(&clp
->cl_lock
);
963 expire_client(struct nfs4_client
*clp
)
965 struct nfs4_stateowner
*sop
;
966 struct nfs4_delegation
*dp
;
967 struct list_head reaplist
;
969 INIT_LIST_HEAD(&reaplist
);
970 spin_lock(&recall_lock
);
971 while (!list_empty(&clp
->cl_delegations
)) {
972 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
973 list_del_init(&dp
->dl_perclnt
);
974 list_move(&dp
->dl_recall_lru
, &reaplist
);
976 spin_unlock(&recall_lock
);
977 while (!list_empty(&reaplist
)) {
978 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
979 list_del_init(&dp
->dl_recall_lru
);
980 unhash_delegation(dp
);
982 while (!list_empty(&clp
->cl_openowners
)) {
983 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
984 release_openowner(sop
);
986 nfsd4_shutdown_callback(clp
);
987 if (clp
->cl_cb_conn
.cb_xprt
)
988 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
989 list_del(&clp
->cl_idhash
);
990 list_del(&clp
->cl_strhash
);
991 spin_lock(&client_lock
);
992 unhash_client_locked(clp
);
993 if (atomic_read(&clp
->cl_refcount
) == 0)
995 spin_unlock(&client_lock
);
998 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1000 memcpy(target
->cl_verifier
.data
, source
->data
,
1001 sizeof(target
->cl_verifier
.data
));
1004 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1006 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1007 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1010 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1012 target
->cr_uid
= source
->cr_uid
;
1013 target
->cr_gid
= source
->cr_gid
;
1014 target
->cr_group_info
= source
->cr_group_info
;
1015 get_group_info(target
->cr_group_info
);
1018 static int same_name(const char *n1
, const char *n2
)
1020 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1024 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1026 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1030 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1032 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1035 /* XXX what about NGROUP */
1037 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1039 return cr1
->cr_uid
== cr2
->cr_uid
;
1042 static void gen_clid(struct nfs4_client
*clp
)
1044 static u32 current_clientid
= 1;
1046 clp
->cl_clientid
.cl_boot
= boot_time
;
1047 clp
->cl_clientid
.cl_id
= current_clientid
++;
1050 static void gen_confirm(struct nfs4_client
*clp
)
1055 p
= (u32
*)clp
->cl_confirm
.data
;
1056 *p
++ = get_seconds();
1060 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1061 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1063 struct nfs4_client
*clp
;
1064 struct sockaddr
*sa
= svc_addr(rqstp
);
1067 clp
= alloc_client(name
);
1071 INIT_LIST_HEAD(&clp
->cl_sessions
);
1073 princ
= svc_gss_principal(rqstp
);
1075 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1076 if (clp
->cl_principal
== NULL
) {
1082 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1083 atomic_set(&clp
->cl_refcount
, 0);
1084 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1085 INIT_LIST_HEAD(&clp
->cl_idhash
);
1086 INIT_LIST_HEAD(&clp
->cl_strhash
);
1087 INIT_LIST_HEAD(&clp
->cl_openowners
);
1088 INIT_LIST_HEAD(&clp
->cl_delegations
);
1089 INIT_LIST_HEAD(&clp
->cl_lru
);
1090 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1091 spin_lock_init(&clp
->cl_lock
);
1092 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1093 clp
->cl_time
= get_seconds();
1094 clear_bit(0, &clp
->cl_cb_slot_busy
);
1095 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1096 copy_verf(clp
, verf
);
1097 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1098 clp
->cl_flavor
= rqstp
->rq_flavor
;
1099 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1101 clp
->cl_cb_session
= NULL
;
1105 static int check_name(struct xdr_netobj name
)
1109 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1110 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1117 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1119 unsigned int idhashval
;
1121 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1122 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1123 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1128 move_to_confirmed(struct nfs4_client
*clp
)
1130 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1131 unsigned int strhashval
;
1133 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1134 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1135 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1136 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1140 static struct nfs4_client
*
1141 find_confirmed_client(clientid_t
*clid
)
1143 struct nfs4_client
*clp
;
1144 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1146 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1147 if (same_clid(&clp
->cl_clientid
, clid
))
1153 static struct nfs4_client
*
1154 find_unconfirmed_client(clientid_t
*clid
)
1156 struct nfs4_client
*clp
;
1157 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1159 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1160 if (same_clid(&clp
->cl_clientid
, clid
))
1166 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1168 return clp
->cl_exchange_flags
!= 0;
1171 static struct nfs4_client
*
1172 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1174 struct nfs4_client
*clp
;
1176 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1177 if (same_name(clp
->cl_recdir
, dname
))
1183 static struct nfs4_client
*
1184 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1186 struct nfs4_client
*clp
;
1188 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1189 if (same_name(clp
->cl_recdir
, dname
))
1195 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1199 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1200 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1203 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1204 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1210 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1212 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1213 struct sockaddr
*sa
= svc_addr(rqstp
);
1214 u32 scopeid
= rpc_get_scope_id(sa
);
1215 unsigned short expected_family
;
1217 /* Currently, we only support tcp and tcp6 for the callback channel */
1218 if (se
->se_callback_netid_len
== 3 &&
1219 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1220 expected_family
= AF_INET
;
1221 else if (se
->se_callback_netid_len
== 4 &&
1222 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1223 expected_family
= AF_INET6
;
1227 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1228 se
->se_callback_addr_len
,
1229 (struct sockaddr
*)&conn
->cb_addr
,
1230 sizeof(conn
->cb_addr
));
1232 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1235 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1236 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1238 conn
->cb_prog
= se
->se_callback_prog
;
1239 conn
->cb_ident
= se
->se_callback_ident
;
1240 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1243 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1244 conn
->cb_addrlen
= 0;
1245 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1246 "will not receive delegations\n",
1247 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1253 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1256 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1258 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1261 dprintk("--> %s slot %p\n", __func__
, slot
);
1263 slot
->sl_opcnt
= resp
->opcnt
;
1264 slot
->sl_status
= resp
->cstate
.status
;
1266 if (nfsd4_not_cached(resp
)) {
1267 slot
->sl_datalen
= 0;
1270 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1271 base
= (char *)resp
->cstate
.datap
-
1272 (char *)resp
->xbuf
->head
[0].iov_base
;
1273 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1275 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1280 * Encode the replay sequence operation from the slot values.
1281 * If cachethis is FALSE encode the uncached rep error on the next
1282 * operation which sets resp->p and increments resp->opcnt for
1283 * nfs4svc_encode_compoundres.
1287 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1288 struct nfsd4_compoundres
*resp
)
1290 struct nfsd4_op
*op
;
1291 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1293 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1294 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1296 /* Encode the replayed sequence operation */
1297 op
= &args
->ops
[resp
->opcnt
- 1];
1298 nfsd4_encode_operation(resp
, op
);
1300 /* Return nfserr_retry_uncached_rep in next operation. */
1301 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1302 op
= &args
->ops
[resp
->opcnt
++];
1303 op
->status
= nfserr_retry_uncached_rep
;
1304 nfsd4_encode_operation(resp
, op
);
1310 * The sequence operation is not cached because we can use the slot and
1314 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1315 struct nfsd4_sequence
*seq
)
1317 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1320 dprintk("--> %s slot %p\n", __func__
, slot
);
1322 /* Either returns 0 or nfserr_retry_uncached */
1323 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1324 if (status
== nfserr_retry_uncached_rep
)
1327 /* The sequence operation has been encoded, cstate->datap set. */
1328 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1330 resp
->opcnt
= slot
->sl_opcnt
;
1331 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1332 status
= slot
->sl_status
;
1338 * Set the exchange_id flags returned by the server.
1341 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1343 /* pNFS is not supported */
1344 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1346 /* Referrals are supported, Migration is not. */
1347 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1349 /* set the wire flags to return to client. */
1350 clid
->flags
= new->cl_exchange_flags
;
1354 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1355 struct nfsd4_compound_state
*cstate
,
1356 struct nfsd4_exchange_id
*exid
)
1358 struct nfs4_client
*unconf
, *conf
, *new;
1360 unsigned int strhashval
;
1361 char dname
[HEXDIR_LEN
];
1362 char addr_str
[INET6_ADDRSTRLEN
];
1363 nfs4_verifier verf
= exid
->verifier
;
1364 struct sockaddr
*sa
= svc_addr(rqstp
);
1366 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1367 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1368 "ip_addr=%s flags %x, spa_how %d\n",
1369 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1370 addr_str
, exid
->flags
, exid
->spa_how
);
1372 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1373 return nfserr_inval
;
1375 /* Currently only support SP4_NONE */
1376 switch (exid
->spa_how
) {
1380 return nfserr_serverfault
;
1382 BUG(); /* checked by xdr code */
1384 return nfserr_serverfault
; /* no excuse :-/ */
1387 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1392 strhashval
= clientstr_hashval(dname
);
1397 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1399 if (!clp_used_exchangeid(conf
)) {
1400 status
= nfserr_clid_inuse
; /* XXX: ? */
1403 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1404 /* 18.35.4 case 8 */
1405 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1406 status
= nfserr_not_same
;
1409 /* Client reboot: destroy old state */
1410 expire_client(conf
);
1413 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1414 /* 18.35.4 case 9 */
1415 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1416 status
= nfserr_perm
;
1419 expire_client(conf
);
1423 * Set bit when the owner id and verifier map to an already
1424 * confirmed client id (18.35.3).
1426 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1429 * Falling into 18.35.4 case 2, possible router replay.
1430 * Leave confirmed record intact and return same result.
1432 copy_verf(conf
, &verf
);
1437 /* 18.35.4 case 7 */
1438 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1439 status
= nfserr_noent
;
1443 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1446 * Possible retry or client restart. Per 18.35.4 case 4,
1447 * a new unconfirmed record should be generated regardless
1448 * of whether any properties have changed.
1450 expire_client(unconf
);
1455 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1457 status
= nfserr_jukebox
;
1462 add_to_unconfirmed(new, strhashval
);
1464 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1465 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1468 nfsd4_set_ex_flags(new, exid
);
1470 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1471 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1475 nfs4_unlock_state();
1477 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1482 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1484 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1487 /* The slot is in use, and no response has been sent. */
1489 if (seqid
== slot_seqid
)
1490 return nfserr_jukebox
;
1492 return nfserr_seq_misordered
;
1495 if (likely(seqid
== slot_seqid
+ 1))
1498 if (seqid
== slot_seqid
)
1499 return nfserr_replay_cache
;
1501 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1503 /* Misordered replay or misordered new request */
1504 return nfserr_seq_misordered
;
1508 * Cache the create session result into the create session single DRC
1509 * slot cache by saving the xdr structure. sl_seqid has been set.
1510 * Do this for solo or embedded create session operations.
1513 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1514 struct nfsd4_clid_slot
*slot
, int nfserr
)
1516 slot
->sl_status
= nfserr
;
1517 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1521 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1522 struct nfsd4_clid_slot
*slot
)
1524 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1525 return slot
->sl_status
;
1528 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1529 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1530 1 + /* MIN tag is length with zero, only length */ \
1531 3 + /* version, opcount, opcode */ \
1532 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1533 /* seqid, slotID, slotID, cache */ \
1534 4 ) * sizeof(__be32))
1536 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1537 2 + /* verifier: AUTH_NULL, length 0 */\
1539 1 + /* MIN tag is length with zero, only length */ \
1540 3 + /* opcount, opcode, opstatus*/ \
1541 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1542 /* seqid, slotID, slotID, slotID, status */ \
1543 5 ) * sizeof(__be32))
1545 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1547 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1548 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1552 nfsd4_create_session(struct svc_rqst
*rqstp
,
1553 struct nfsd4_compound_state
*cstate
,
1554 struct nfsd4_create_session
*cr_ses
)
1556 struct sockaddr
*sa
= svc_addr(rqstp
);
1557 struct nfs4_client
*conf
, *unconf
;
1558 struct nfsd4_session
*new;
1559 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1560 bool confirm_me
= false;
1563 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1564 return nfserr_inval
;
1567 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1568 conf
= find_confirmed_client(&cr_ses
->clientid
);
1571 cs_slot
= &conf
->cl_cs_slot
;
1572 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1573 if (status
== nfserr_replay_cache
) {
1574 dprintk("Got a create_session replay! seqid= %d\n",
1576 /* Return the cached reply status */
1577 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1579 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1580 status
= nfserr_seq_misordered
;
1581 dprintk("Sequence misordered!\n");
1582 dprintk("Expected seqid= %d but got seqid= %d\n",
1583 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1586 } else if (unconf
) {
1587 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1588 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1589 status
= nfserr_clid_inuse
;
1593 cs_slot
= &unconf
->cl_cs_slot
;
1594 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1596 /* an unconfirmed replay returns misordered */
1597 status
= nfserr_seq_misordered
;
1604 status
= nfserr_stale_clientid
;
1609 * XXX: we should probably set this at creation time, and check
1610 * for consistent minorversion use throughout:
1612 conf
->cl_minorversion
= 1;
1614 * We do not support RDMA or persistent sessions
1616 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1617 cr_ses
->flags
&= ~SESSION4_RDMA
;
1619 status
= nfserr_toosmall
;
1620 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1623 status
= nfserr_jukebox
;
1624 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1628 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1629 NFS4_MAX_SESSIONID_LEN
);
1630 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1631 sizeof(struct nfsd4_channel_attrs
));
1632 cs_slot
->sl_seqid
++;
1633 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1635 /* cache solo and embedded create sessions under the state lock */
1636 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1638 move_to_confirmed(conf
);
1640 nfs4_unlock_state();
1641 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1645 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1647 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1648 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1650 return argp
->opcnt
== resp
->opcnt
;
1653 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1656 case NFS4_CDFC4_FORE
:
1657 case NFS4_CDFC4_BACK
:
1659 case NFS4_CDFC4_FORE_OR_BOTH
:
1660 case NFS4_CDFC4_BACK_OR_BOTH
:
1661 *dir
= NFS4_CDFC4_BOTH
;
1664 return nfserr_inval
;
1667 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1668 struct nfsd4_compound_state
*cstate
,
1669 struct nfsd4_bind_conn_to_session
*bcts
)
1673 if (!nfsd4_last_compound_op(rqstp
))
1674 return nfserr_not_only_op
;
1675 spin_lock(&client_lock
);
1676 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1677 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1678 * client_lock iself: */
1679 if (cstate
->session
) {
1680 nfsd4_get_session(cstate
->session
);
1681 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1683 spin_unlock(&client_lock
);
1684 if (!cstate
->session
)
1685 return nfserr_badsession
;
1687 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1689 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1693 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1697 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1701 nfsd4_destroy_session(struct svc_rqst
*r
,
1702 struct nfsd4_compound_state
*cstate
,
1703 struct nfsd4_destroy_session
*sessionid
)
1705 struct nfsd4_session
*ses
;
1706 u32 status
= nfserr_badsession
;
1709 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1710 * - Should we return nfserr_back_chan_busy if waiting for
1711 * callbacks on to-be-destroyed session?
1712 * - Do we need to clear any callback info from previous session?
1715 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1716 if (!nfsd4_last_compound_op(r
))
1717 return nfserr_not_only_op
;
1719 dump_sessionid(__func__
, &sessionid
->sessionid
);
1720 spin_lock(&client_lock
);
1721 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1723 spin_unlock(&client_lock
);
1727 unhash_session(ses
);
1728 spin_unlock(&client_lock
);
1731 nfsd4_probe_callback_sync(ses
->se_client
);
1732 nfs4_unlock_state();
1734 nfsd4_del_conns(ses
);
1736 nfsd4_put_session(ses
);
1739 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1743 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1745 struct nfsd4_conn
*c
;
1747 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1748 if (c
->cn_xprt
== xpt
) {
1755 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1757 struct nfs4_client
*clp
= ses
->se_client
;
1758 struct nfsd4_conn
*c
;
1761 spin_lock(&clp
->cl_lock
);
1762 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1764 spin_unlock(&clp
->cl_lock
);
1768 __nfsd4_hash_conn(new, ses
);
1769 spin_unlock(&clp
->cl_lock
);
1770 ret
= nfsd4_register_conn(new);
1772 /* oops; xprt is already down: */
1773 nfsd4_conn_lost(&new->cn_xpt_user
);
1777 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1779 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1781 return args
->opcnt
> session
->se_fchannel
.maxops
;
1784 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1785 struct nfsd4_session
*session
)
1787 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1789 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1793 nfsd4_sequence(struct svc_rqst
*rqstp
,
1794 struct nfsd4_compound_state
*cstate
,
1795 struct nfsd4_sequence
*seq
)
1797 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1798 struct nfsd4_session
*session
;
1799 struct nfsd4_slot
*slot
;
1800 struct nfsd4_conn
*conn
;
1803 if (resp
->opcnt
!= 1)
1804 return nfserr_sequence_pos
;
1807 * Will be either used or freed by nfsd4_sequence_check_conn
1810 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1812 return nfserr_jukebox
;
1814 spin_lock(&client_lock
);
1815 status
= nfserr_badsession
;
1816 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1820 status
= nfserr_too_many_ops
;
1821 if (nfsd4_session_too_many_ops(rqstp
, session
))
1824 status
= nfserr_req_too_big
;
1825 if (nfsd4_request_too_big(rqstp
, session
))
1828 status
= nfserr_badslot
;
1829 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1832 slot
= session
->se_slots
[seq
->slotid
];
1833 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1835 /* We do not negotiate the number of slots yet, so set the
1836 * maxslots to the session maxreqs which is used to encode
1837 * sr_highest_slotid and the sr_target_slot id to maxslots */
1838 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1840 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1841 if (status
== nfserr_replay_cache
) {
1842 cstate
->slot
= slot
;
1843 cstate
->session
= session
;
1844 /* Return the cached reply status and set cstate->status
1845 * for nfsd4_proc_compound processing */
1846 status
= nfsd4_replay_cache_entry(resp
, seq
);
1847 cstate
->status
= nfserr_replay_cache
;
1853 nfsd4_sequence_check_conn(conn
, session
);
1856 /* Success! bump slot seqid */
1857 slot
->sl_inuse
= true;
1858 slot
->sl_seqid
= seq
->seqid
;
1859 slot
->sl_cachethis
= seq
->cachethis
;
1861 cstate
->slot
= slot
;
1862 cstate
->session
= session
;
1865 /* Hold a session reference until done processing the compound. */
1866 if (cstate
->session
) {
1867 struct nfs4_client
*clp
= session
->se_client
;
1869 nfsd4_get_session(cstate
->session
);
1870 atomic_inc(&clp
->cl_refcount
);
1871 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1872 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1875 spin_unlock(&client_lock
);
1876 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1881 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1885 if (rc
->rca_one_fs
) {
1886 if (!cstate
->current_fh
.fh_dentry
)
1887 return nfserr_nofilehandle
;
1889 * We don't take advantage of the rca_one_fs case.
1890 * That's OK, it's optional, we can safely ignore it.
1896 status
= nfserr_complete_already
;
1897 if (cstate
->session
->se_client
->cl_firststate
)
1900 status
= nfserr_stale_clientid
;
1901 if (is_client_expired(cstate
->session
->se_client
))
1903 * The following error isn't really legal.
1904 * But we only get here if the client just explicitly
1905 * destroyed the client. Surely it no longer cares what
1906 * error it gets back on an operation for the dead
1912 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1914 nfs4_unlock_state();
1919 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1920 struct nfsd4_setclientid
*setclid
)
1922 struct xdr_netobj clname
= {
1923 .len
= setclid
->se_namelen
,
1924 .data
= setclid
->se_name
,
1926 nfs4_verifier clverifier
= setclid
->se_verf
;
1927 unsigned int strhashval
;
1928 struct nfs4_client
*conf
, *unconf
, *new;
1930 char dname
[HEXDIR_LEN
];
1932 if (!check_name(clname
))
1933 return nfserr_inval
;
1935 status
= nfs4_make_rec_clidname(dname
, &clname
);
1940 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1941 * We get here on a DRC miss.
1944 strhashval
= clientstr_hashval(dname
);
1947 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1949 /* RFC 3530 14.2.33 CASE 0: */
1950 status
= nfserr_clid_inuse
;
1951 if (clp_used_exchangeid(conf
))
1953 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1954 char addr_str
[INET6_ADDRSTRLEN
];
1955 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1957 dprintk("NFSD: setclientid: string in use by client "
1958 "at %s\n", addr_str
);
1963 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1964 * has a description of SETCLIENTID request processing consisting
1965 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1967 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1968 status
= nfserr_jukebox
;
1971 * RFC 3530 14.2.33 CASE 4:
1972 * placed first, because it is the normal case
1975 expire_client(unconf
);
1976 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1980 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1982 * RFC 3530 14.2.33 CASE 1:
1983 * probable callback update
1986 /* Note this is removing unconfirmed {*x***},
1987 * which is stronger than RFC recommended {vxc**}.
1988 * This has the advantage that there is at most
1989 * one {*x***} in either list at any time.
1991 expire_client(unconf
);
1993 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1996 copy_clid(new, conf
);
1997 } else if (!unconf
) {
1999 * RFC 3530 14.2.33 CASE 2:
2000 * probable client reboot; state will be removed if
2003 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2009 * RFC 3530 14.2.33 CASE 3:
2010 * probable client reboot; state will be removed if
2013 expire_client(unconf
);
2014 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2020 * XXX: we should probably set this at creation time, and check
2021 * for consistent minorversion use throughout:
2023 new->cl_minorversion
= 0;
2024 gen_callback(new, setclid
, rqstp
);
2025 add_to_unconfirmed(new, strhashval
);
2026 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2027 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2028 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2031 nfs4_unlock_state();
2037 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2038 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2039 * bullets, labeled as CASE1 - CASE4 below.
2042 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2043 struct nfsd4_compound_state
*cstate
,
2044 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2046 struct sockaddr
*sa
= svc_addr(rqstp
);
2047 struct nfs4_client
*conf
, *unconf
;
2048 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2049 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2052 if (STALE_CLIENTID(clid
))
2053 return nfserr_stale_clientid
;
2055 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2056 * We get here on a DRC miss.
2061 conf
= find_confirmed_client(clid
);
2062 unconf
= find_unconfirmed_client(clid
);
2064 status
= nfserr_clid_inuse
;
2065 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2067 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2071 * section 14.2.34 of RFC 3530 has a description of
2072 * SETCLIENTID_CONFIRM request processing consisting
2073 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2075 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2077 * RFC 3530 14.2.34 CASE 1:
2080 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2081 status
= nfserr_clid_inuse
;
2083 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2084 nfsd4_probe_callback(conf
);
2085 expire_client(unconf
);
2089 } else if (conf
&& !unconf
) {
2091 * RFC 3530 14.2.34 CASE 2:
2092 * probable retransmitted request; play it safe and
2095 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2096 status
= nfserr_clid_inuse
;
2099 } else if (!conf
&& unconf
2100 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2102 * RFC 3530 14.2.34 CASE 3:
2103 * Normal case; new or rebooted client:
2105 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2106 status
= nfserr_clid_inuse
;
2109 clientstr_hashval(unconf
->cl_recdir
);
2110 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2113 nfsd4_remove_clid_dir(conf
);
2114 expire_client(conf
);
2116 move_to_confirmed(unconf
);
2118 nfsd4_probe_callback(conf
);
2121 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2122 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2125 * RFC 3530 14.2.34 CASE 4:
2126 * Client probably hasn't noticed that we rebooted yet.
2128 status
= nfserr_stale_clientid
;
2130 /* check that we have hit one of the cases...*/
2131 status
= nfserr_clid_inuse
;
2134 nfs4_unlock_state();
2138 /* OPEN Share state helper functions */
2139 static inline struct nfs4_file
*
2140 alloc_init_file(struct inode
*ino
)
2142 struct nfs4_file
*fp
;
2143 unsigned int hashval
= file_hashval(ino
);
2145 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2147 atomic_set(&fp
->fi_ref
, 1);
2148 INIT_LIST_HEAD(&fp
->fi_hash
);
2149 INIT_LIST_HEAD(&fp
->fi_stateids
);
2150 INIT_LIST_HEAD(&fp
->fi_delegations
);
2151 fp
->fi_inode
= igrab(ino
);
2152 fp
->fi_id
= current_fileid
++;
2153 fp
->fi_had_conflict
= false;
2154 fp
->fi_lease
= NULL
;
2155 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2156 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2157 spin_lock(&recall_lock
);
2158 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2159 spin_unlock(&recall_lock
);
2166 nfsd4_free_slab(struct kmem_cache
**slab
)
2170 kmem_cache_destroy(*slab
);
2175 nfsd4_free_slabs(void)
2177 nfsd4_free_slab(&stateowner_slab
);
2178 nfsd4_free_slab(&file_slab
);
2179 nfsd4_free_slab(&stateid_slab
);
2180 nfsd4_free_slab(&deleg_slab
);
2184 nfsd4_init_slabs(void)
2186 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
2187 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
2188 if (stateowner_slab
== NULL
)
2190 file_slab
= kmem_cache_create("nfsd4_files",
2191 sizeof(struct nfs4_file
), 0, 0, NULL
);
2192 if (file_slab
== NULL
)
2194 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2195 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2196 if (stateid_slab
== NULL
)
2198 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2199 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2200 if (deleg_slab
== NULL
)
2205 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2210 nfs4_free_stateowner(struct kref
*kref
)
2212 struct nfs4_stateowner
*sop
=
2213 container_of(kref
, struct nfs4_stateowner
, so_ref
);
2214 kfree(sop
->so_owner
.data
);
2215 kmem_cache_free(stateowner_slab
, sop
);
2218 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2220 rp
->rp_status
= nfserr_serverfault
;
2222 rp
->rp_buf
= rp
->rp_ibuf
;
2225 static inline struct nfs4_stateowner
*alloc_stateowner(struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2227 struct nfs4_stateowner
*sop
;
2229 sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
);
2233 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2234 if (!sop
->so_owner
.data
) {
2235 kmem_cache_free(stateowner_slab
, sop
);
2238 sop
->so_owner
.len
= owner
->len
;
2240 kref_init(&sop
->so_ref
);
2241 INIT_LIST_HEAD(&sop
->so_perclient
);
2242 INIT_LIST_HEAD(&sop
->so_stateids
);
2243 INIT_LIST_HEAD(&sop
->so_perstateid
);
2244 INIT_LIST_HEAD(&sop
->so_close_lru
);
2245 sop
->so_id
= current_ownerid
++;
2247 sop
->so_client
= clp
;
2248 init_nfs4_replay(&sop
->so_replay
);
2252 static void hash_openowner(struct nfs4_stateowner
*sop
, struct nfs4_client
*clp
, unsigned int strhashval
)
2254 unsigned int idhashval
;
2256 idhashval
= open_ownerid_hashval(sop
->so_id
);
2257 list_add(&sop
->so_idhash
, &open_ownerid_hashtbl
[idhashval
]);
2258 list_add(&sop
->so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2259 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
2262 static struct nfs4_stateowner
*
2263 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2264 struct nfs4_stateowner
*sop
;
2266 sop
= alloc_stateowner(&open
->op_owner
, clp
);
2269 sop
->so_is_open_owner
= 1;
2270 sop
->so_seqid
= open
->op_seqid
;
2271 sop
->so_confirmed
= 0;
2272 hash_openowner(sop
, clp
, strhashval
);
2277 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2278 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2279 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
2281 INIT_LIST_HEAD(&stp
->st_hash
);
2282 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2283 INIT_LIST_HEAD(&stp
->st_lockowners
);
2284 INIT_LIST_HEAD(&stp
->st_perfile
);
2285 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2286 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
2287 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2288 stp
->st_type
= NFS4_OPEN_STID
;
2289 stp
->st_stateowner
= sop
;
2292 stp
->st_stateid
.si_boot
= boot_time
;
2293 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
2294 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2295 stp
->st_stateid
.si_generation
= 0;
2296 stp
->st_access_bmap
= 0;
2297 stp
->st_deny_bmap
= 0;
2298 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2299 &stp
->st_access_bmap
);
2300 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2301 stp
->st_openstp
= NULL
;
2305 move_to_close_lru(struct nfs4_stateowner
*sop
)
2307 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
2309 list_move_tail(&sop
->so_close_lru
, &close_lru
);
2310 sop
->so_time
= get_seconds();
2314 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2317 return (sop
->so_owner
.len
== owner
->len
) &&
2318 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2319 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2322 static struct nfs4_stateowner
*
2323 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2325 struct nfs4_stateowner
*so
= NULL
;
2327 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2328 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2334 /* search file_hashtbl[] for file */
2335 static struct nfs4_file
*
2336 find_file(struct inode
*ino
)
2338 unsigned int hashval
= file_hashval(ino
);
2339 struct nfs4_file
*fp
;
2341 spin_lock(&recall_lock
);
2342 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2343 if (fp
->fi_inode
== ino
) {
2345 spin_unlock(&recall_lock
);
2349 spin_unlock(&recall_lock
);
2353 static inline int access_valid(u32 x
, u32 minorversion
)
2355 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2357 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2359 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2360 if (minorversion
&& x
) {
2361 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2363 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2365 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2372 static inline int deny_valid(u32 x
)
2374 /* Note: unlike access bits, deny bits may be zero. */
2375 return x
<= NFS4_SHARE_DENY_BOTH
;
2379 * Called to check deny when READ with all zero stateid or
2380 * WRITE with all zero or all one stateid
2383 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2385 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2386 struct nfs4_file
*fp
;
2387 struct nfs4_stateid
*stp
;
2390 dprintk("NFSD: nfs4_share_conflict\n");
2392 fp
= find_file(ino
);
2395 ret
= nfserr_locked
;
2396 /* Search for conflicting share reservations */
2397 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2398 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2399 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2408 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2410 /* We're assuming the state code never drops its reference
2411 * without first removing the lease. Since we're in this lease
2412 * callback (and since the lease code is serialized by the kernel
2413 * lock) we know the server hasn't removed the lease yet, we know
2414 * it's safe to take a reference: */
2415 atomic_inc(&dp
->dl_count
);
2417 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2419 /* only place dl_time is set. protected by lock_flocks*/
2420 dp
->dl_time
= get_seconds();
2422 nfsd4_cb_recall(dp
);
2425 /* Called from break_lease() with lock_flocks() held. */
2426 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2428 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2429 struct nfs4_delegation
*dp
;
2432 /* We assume break_lease is only called once per lease: */
2433 BUG_ON(fp
->fi_had_conflict
);
2435 * We don't want the locks code to timeout the lease for us;
2436 * we'll remove it ourself if a delegation isn't returned
2439 fl
->fl_break_time
= 0;
2441 spin_lock(&recall_lock
);
2442 fp
->fi_had_conflict
= true;
2443 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2444 nfsd_break_one_deleg(dp
);
2445 spin_unlock(&recall_lock
);
2449 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2452 return lease_modify(onlist
, arg
);
2457 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2458 .lm_break
= nfsd_break_deleg_cb
,
2459 .lm_change
= nfsd_change_deleg_cb
,
2464 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2465 struct nfsd4_open
*open
)
2467 clientid_t
*clientid
= &open
->op_clientid
;
2468 struct nfs4_client
*clp
= NULL
;
2469 unsigned int strhashval
;
2470 struct nfs4_stateowner
*sop
= NULL
;
2472 if (!check_name(open
->op_owner
))
2473 return nfserr_inval
;
2475 if (STALE_CLIENTID(&open
->op_clientid
))
2476 return nfserr_stale_clientid
;
2478 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2479 sop
= find_openstateowner_str(strhashval
, open
);
2480 open
->op_stateowner
= sop
;
2482 /* Make sure the client's lease hasn't expired. */
2483 clp
= find_confirmed_client(clientid
);
2485 return nfserr_expired
;
2488 /* When sessions are used, skip open sequenceid processing */
2489 if (nfsd4_has_session(cstate
))
2491 if (!sop
->so_confirmed
) {
2492 /* Replace unconfirmed owners without checking for replay. */
2493 clp
= sop
->so_client
;
2494 release_openowner(sop
);
2495 open
->op_stateowner
= NULL
;
2498 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2499 if (sop
->so_replay
.rp_buflen
)
2500 return nfserr_replay_me
;
2501 /* The original OPEN failed so spectacularly
2502 * that we don't even have replay data saved!
2503 * Therefore, we have no choice but to continue
2504 * processing this OPEN; presumably, we'll
2505 * fail again for the same reason.
2507 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2510 if (open
->op_seqid
!= sop
->so_seqid
)
2511 return nfserr_bad_seqid
;
2513 if (open
->op_stateowner
== NULL
) {
2514 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2516 return nfserr_jukebox
;
2517 open
->op_stateowner
= sop
;
2519 list_del_init(&sop
->so_close_lru
);
2520 renew_client(sop
->so_client
);
2524 static inline __be32
2525 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2527 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2528 return nfserr_openmode
;
2533 static struct nfs4_delegation
*
2534 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2536 struct nfs4_delegation
*dp
;
2538 spin_lock(&recall_lock
);
2539 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2540 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
) {
2541 spin_unlock(&recall_lock
);
2544 spin_unlock(&recall_lock
);
2548 static int share_access_to_flags(u32 share_access
)
2550 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2552 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2556 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2557 struct nfs4_delegation
**dp
)
2560 __be32 status
= nfserr_bad_stateid
;
2562 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2565 flags
= share_access_to_flags(open
->op_share_access
);
2566 status
= nfs4_check_delegmode(*dp
, flags
);
2570 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2574 open
->op_stateowner
->so_confirmed
= 1;
2579 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2581 struct nfs4_stateid
*local
;
2582 __be32 status
= nfserr_share_denied
;
2583 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2585 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2586 /* ignore lock owners */
2587 if (local
->st_stateowner
->so_is_open_owner
== 0)
2589 /* remember if we have seen this open owner */
2590 if (local
->st_stateowner
== sop
)
2592 /* check for conflicting share reservations */
2593 if (!test_share(local
, open
))
2601 static inline struct nfs4_stateid
*
2602 nfs4_alloc_stateid(void)
2604 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2607 static inline int nfs4_access_to_access(u32 nfs4_access
)
2611 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2612 flags
|= NFSD_MAY_READ
;
2613 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2614 flags
|= NFSD_MAY_WRITE
;
2618 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2619 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2622 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2623 int access
= nfs4_access_to_access(open
->op_share_access
);
2625 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2626 * allowing it to break the lease and return EAGAIN leaves the
2627 * client unable to make progress in returning the delegation */
2628 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2629 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2631 if (!fp
->fi_fds
[oflag
]) {
2632 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2633 &fp
->fi_fds
[oflag
]);
2637 nfs4_file_get_access(fp
, oflag
);
2643 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2644 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2645 struct nfsd4_open
*open
)
2647 struct nfs4_stateid
*stp
;
2650 stp
= nfs4_alloc_stateid();
2652 return nfserr_jukebox
;
2654 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2656 kmem_cache_free(stateid_slab
, stp
);
2663 static inline __be32
2664 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2665 struct nfsd4_open
*open
)
2667 struct iattr iattr
= {
2668 .ia_valid
= ATTR_SIZE
,
2671 if (!open
->op_truncate
)
2673 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2674 return nfserr_inval
;
2675 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2679 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2681 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2685 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2687 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2691 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2694 int oflag
= nfs4_access_to_omode(op_share_access
);
2695 nfs4_file_put_access(fp
, oflag
);
2699 /* remember the open */
2700 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2701 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2708 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2710 open
->op_stateowner
->so_confirmed
= 1;
2711 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2714 /* Should we give out recallable state?: */
2715 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2717 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2720 * In the sessions case, since we don't have to establish a
2721 * separate connection for callbacks, we assume it's OK
2722 * until we hear otherwise:
2724 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2727 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2729 struct file_lock
*fl
;
2731 fl
= locks_alloc_lock();
2734 locks_init_lock(fl
);
2735 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2736 fl
->fl_flags
= FL_LEASE
;
2737 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2738 fl
->fl_end
= OFFSET_MAX
;
2739 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2740 fl
->fl_pid
= current
->tgid
;
2744 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2746 struct nfs4_file
*fp
= dp
->dl_file
;
2747 struct file_lock
*fl
;
2750 fl
= nfs4_alloc_init_lease(dp
, flag
);
2753 fl
->fl_file
= find_readable_file(fp
);
2754 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2755 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2757 list_del_init(&dp
->dl_perclnt
);
2758 locks_free_lock(fl
);
2762 fp
->fi_deleg_file
= fl
->fl_file
;
2763 get_file(fp
->fi_deleg_file
);
2764 atomic_set(&fp
->fi_delegees
, 1);
2765 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2769 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2771 struct nfs4_file
*fp
= dp
->dl_file
;
2774 return nfs4_setlease(dp
, flag
);
2775 spin_lock(&recall_lock
);
2776 if (fp
->fi_had_conflict
) {
2777 spin_unlock(&recall_lock
);
2780 atomic_inc(&fp
->fi_delegees
);
2781 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2782 spin_unlock(&recall_lock
);
2783 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2788 * Attempt to hand out a delegation.
2791 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2793 struct nfs4_delegation
*dp
;
2794 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2796 int status
, flag
= 0;
2798 cb_up
= nfsd4_cb_channel_good(sop
->so_client
);
2799 flag
= NFS4_OPEN_DELEGATE_NONE
;
2800 open
->op_recall
= 0;
2801 switch (open
->op_claim_type
) {
2802 case NFS4_OPEN_CLAIM_PREVIOUS
:
2804 open
->op_recall
= 1;
2805 flag
= open
->op_delegate_type
;
2806 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2809 case NFS4_OPEN_CLAIM_NULL
:
2810 /* Let's not give out any delegations till everyone's
2811 * had the chance to reclaim theirs.... */
2812 if (locks_in_grace())
2814 if (!cb_up
|| !sop
->so_confirmed
)
2816 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2817 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2819 flag
= NFS4_OPEN_DELEGATE_READ
;
2825 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2828 status
= nfs4_set_delegation(dp
, flag
);
2832 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2834 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2835 STATEID_VAL(&dp
->dl_stateid
));
2837 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2838 && flag
== NFS4_OPEN_DELEGATE_NONE
2839 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2840 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2841 open
->op_delegate_type
= flag
;
2844 nfs4_put_delegation(dp
);
2846 flag
= NFS4_OPEN_DELEGATE_NONE
;
2851 * called with nfs4_lock_state() held.
2854 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2856 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2857 struct nfs4_file
*fp
= NULL
;
2858 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2859 struct nfs4_stateid
*stp
= NULL
;
2860 struct nfs4_delegation
*dp
= NULL
;
2863 status
= nfserr_inval
;
2864 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2865 || !deny_valid(open
->op_share_deny
))
2868 * Lookup file; if found, lookup stateid and check open request,
2869 * and check for delegations in the process of being recalled.
2870 * If not found, create the nfs4_file struct
2872 fp
= find_file(ino
);
2874 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2876 status
= nfs4_check_deleg(fp
, open
, &dp
);
2880 status
= nfserr_bad_stateid
;
2881 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2883 status
= nfserr_jukebox
;
2884 fp
= alloc_init_file(ino
);
2890 * OPEN the file, or upgrade an existing OPEN.
2891 * If truncate fails, the OPEN fails.
2894 /* Stateid was found, this is an OPEN upgrade */
2895 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2898 update_stateid(&stp
->st_stateid
);
2900 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2903 init_stateid(stp
, fp
, open
);
2904 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2906 release_open_stateid(stp
);
2909 if (nfsd4_has_session(&resp
->cstate
))
2910 update_stateid(&stp
->st_stateid
);
2912 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2914 if (nfsd4_has_session(&resp
->cstate
))
2915 open
->op_stateowner
->so_confirmed
= 1;
2918 * Attempt to hand out a delegation. No error return, because the
2919 * OPEN succeeds even if we fail.
2921 nfs4_open_delegation(current_fh
, open
, stp
);
2925 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2926 STATEID_VAL(&stp
->st_stateid
));
2930 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2931 nfs4_set_claim_prev(open
);
2933 * To finish the open response, we just need to set the rflags.
2935 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2936 if (!open
->op_stateowner
->so_confirmed
&&
2937 !nfsd4_has_session(&resp
->cstate
))
2938 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2944 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2947 struct nfs4_client
*clp
;
2951 dprintk("process_renew(%08x/%08x): starting\n",
2952 clid
->cl_boot
, clid
->cl_id
);
2953 status
= nfserr_stale_clientid
;
2954 if (STALE_CLIENTID(clid
))
2956 clp
= find_confirmed_client(clid
);
2957 status
= nfserr_expired
;
2959 /* We assume the client took too long to RENEW. */
2960 dprintk("nfsd4_renew: clientid not found!\n");
2964 status
= nfserr_cb_path_down
;
2965 if (!list_empty(&clp
->cl_delegations
)
2966 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2970 nfs4_unlock_state();
2974 static struct lock_manager nfsd4_manager
= {
2978 nfsd4_end_grace(void)
2980 dprintk("NFSD: end of grace period\n");
2981 nfsd4_recdir_purge_old();
2982 locks_end_grace(&nfsd4_manager
);
2984 * Now that every NFSv4 client has had the chance to recover and
2985 * to see the (possibly new, possibly shorter) lease time, we
2986 * can safely set the next grace time to the current lease time:
2988 nfsd4_grace
= nfsd4_lease
;
2992 nfs4_laundromat(void)
2994 struct nfs4_client
*clp
;
2995 struct nfs4_stateowner
*sop
;
2996 struct nfs4_delegation
*dp
;
2997 struct list_head
*pos
, *next
, reaplist
;
2998 time_t cutoff
= get_seconds() - nfsd4_lease
;
2999 time_t t
, clientid_val
= nfsd4_lease
;
3000 time_t u
, test_val
= nfsd4_lease
;
3004 dprintk("NFSD: laundromat service - starting\n");
3005 if (locks_in_grace())
3007 INIT_LIST_HEAD(&reaplist
);
3008 spin_lock(&client_lock
);
3009 list_for_each_safe(pos
, next
, &client_lru
) {
3010 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3011 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3012 t
= clp
->cl_time
- cutoff
;
3013 if (clientid_val
> t
)
3017 if (atomic_read(&clp
->cl_refcount
)) {
3018 dprintk("NFSD: client in use (clientid %08x)\n",
3019 clp
->cl_clientid
.cl_id
);
3022 unhash_client_locked(clp
);
3023 list_add(&clp
->cl_lru
, &reaplist
);
3025 spin_unlock(&client_lock
);
3026 list_for_each_safe(pos
, next
, &reaplist
) {
3027 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3028 dprintk("NFSD: purging unused client (clientid %08x)\n",
3029 clp
->cl_clientid
.cl_id
);
3030 nfsd4_remove_clid_dir(clp
);
3033 spin_lock(&recall_lock
);
3034 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3035 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3036 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3037 u
= dp
->dl_time
- cutoff
;
3042 list_move(&dp
->dl_recall_lru
, &reaplist
);
3044 spin_unlock(&recall_lock
);
3045 list_for_each_safe(pos
, next
, &reaplist
) {
3046 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3047 list_del_init(&dp
->dl_recall_lru
);
3048 unhash_delegation(dp
);
3050 test_val
= nfsd4_lease
;
3051 list_for_each_safe(pos
, next
, &close_lru
) {
3052 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
3053 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
3054 u
= sop
->so_time
- cutoff
;
3059 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
3061 release_openowner(sop
);
3063 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3064 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3065 nfs4_unlock_state();
3066 return clientid_val
;
3069 static struct workqueue_struct
*laundry_wq
;
3070 static void laundromat_main(struct work_struct
*);
3071 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3074 laundromat_main(struct work_struct
*not_used
)
3078 t
= nfs4_laundromat();
3079 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3080 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3083 static struct nfs4_stateowner
*
3084 search_close_lru(u32 st_id
, int flags
)
3086 struct nfs4_stateowner
*local
= NULL
;
3088 if (flags
& CLOSE_STATE
) {
3089 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
3090 if (local
->so_id
== st_id
)
3098 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
3100 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
3104 STALE_STATEID(stateid_t
*stateid
)
3106 if (stateid
->si_boot
== boot_time
)
3108 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3109 STATEID_VAL(stateid
));
3114 access_permit_read(unsigned long access_bmap
)
3116 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3117 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3118 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3122 access_permit_write(unsigned long access_bmap
)
3124 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3125 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3129 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
3131 __be32 status
= nfserr_openmode
;
3133 /* For lock stateid's, we test the parent open, not the lock: */
3134 if (stp
->st_openstp
)
3135 stp
= stp
->st_openstp
;
3136 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3138 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3145 static inline __be32
3146 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3148 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3150 else if (locks_in_grace()) {
3151 /* Answer in remaining cases depends on existence of
3152 * conflicting state; so we must wait out the grace period. */
3153 return nfserr_grace
;
3154 } else if (flags
& WR_STATE
)
3155 return nfs4_share_conflict(current_fh
,
3156 NFS4_SHARE_DENY_WRITE
);
3157 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3158 return nfs4_share_conflict(current_fh
,
3159 NFS4_SHARE_DENY_READ
);
3163 * Allow READ/WRITE during grace period on recovered state only for files
3164 * that are not able to provide mandatory locking.
3167 grace_disallows_io(struct inode
*inode
)
3169 return locks_in_grace() && mandatory_lock(inode
);
3172 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3175 * When sessions are used the stateid generation number is ignored
3178 if (has_session
&& in
->si_generation
== 0)
3181 /* If the client sends us a stateid from the future, it's buggy: */
3182 if (in
->si_generation
> ref
->si_generation
)
3183 return nfserr_bad_stateid
;
3185 * The following, however, can happen. For example, if the
3186 * client sends an open and some IO at the same time, the open
3187 * may bump si_generation while the IO is still in flight.
3188 * Thanks to hard links and renames, the client never knows what
3189 * file an open will affect. So it could avoid that situation
3190 * only by serializing all opens and IO from the same open
3191 * owner. To recover from the old_stateid error, the client
3192 * will just have to retry the IO:
3194 if (in
->si_generation
< ref
->si_generation
)
3195 return nfserr_old_stateid
;
3200 static int is_delegation_stateid(stateid_t
*stateid
)
3202 return stateid
->si_fileid
== 0;
3205 __be32
nfs4_validate_stateid(stateid_t
*stateid
, bool has_session
)
3207 struct nfs4_stateid
*stp
= NULL
;
3208 __be32 status
= nfserr_stale_stateid
;
3210 if (STALE_STATEID(stateid
))
3213 status
= nfserr_expired
;
3214 stp
= search_for_stateid(stateid
);
3217 status
= nfserr_bad_stateid
;
3219 if (!stp
->st_stateowner
->so_confirmed
)
3222 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, has_session
);
3232 * Checks for stateid operations
3235 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3236 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3238 struct nfs4_stateid
*stp
= NULL
;
3239 struct nfs4_delegation
*dp
= NULL
;
3240 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3241 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3247 if (grace_disallows_io(ino
))
3248 return nfserr_grace
;
3250 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3251 return check_special_stateids(current_fh
, stateid
, flags
);
3253 status
= nfserr_stale_stateid
;
3254 if (STALE_STATEID(stateid
))
3258 * We assume that any stateid that has the current boot time,
3259 * but that we can't find, is expired:
3261 status
= nfserr_expired
;
3262 if (is_delegation_stateid(stateid
)) {
3263 dp
= find_delegation_stateid(ino
, stateid
);
3266 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3269 status
= nfs4_check_delegmode(dp
, flags
);
3272 renew_client(dp
->dl_client
);
3274 *filpp
= dp
->dl_file
->fi_deleg_file
;
3277 } else { /* open or lock stateid */
3278 stp
= find_stateid(stateid
, flags
);
3281 status
= nfserr_bad_stateid
;
3282 if (nfs4_check_fh(current_fh
, stp
))
3284 if (!stp
->st_stateowner
->so_confirmed
)
3286 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3287 nfsd4_has_session(cstate
));
3290 status
= nfs4_check_openmode(stp
, flags
);
3293 renew_client(stp
->st_stateowner
->so_client
);
3295 if (flags
& RD_STATE
)
3296 *filpp
= find_readable_file(stp
->st_file
);
3298 *filpp
= find_writeable_file(stp
->st_file
);
3307 nfsd4_free_delegation_stateid(stateid_t
*stateid
)
3309 struct nfs4_delegation
*dp
= search_for_delegation(stateid
);
3311 return nfserr_locks_held
;
3312 return nfserr_bad_stateid
;
3316 nfsd4_free_lock_stateid(struct nfs4_stateid
*stp
)
3318 if (check_for_locks(stp
->st_file
, stp
->st_stateowner
))
3319 return nfserr_locks_held
;
3320 release_lock_stateid(stp
);
3325 * Test if the stateid is valid
3328 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3329 struct nfsd4_test_stateid
*test_stateid
)
3331 test_stateid
->ts_has_session
= nfsd4_has_session(cstate
);
3339 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3340 struct nfsd4_free_stateid
*free_stateid
)
3342 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3343 struct nfs4_stateid
*stp
;
3347 if (is_delegation_stateid(stateid
)) {
3348 ret
= nfsd4_free_delegation_stateid(stateid
);
3352 stp
= search_for_stateid(stateid
);
3354 ret
= nfserr_bad_stateid
;
3357 if (stateid
->si_generation
!= 0) {
3358 if (stateid
->si_generation
< stp
->st_stateid
.si_generation
) {
3359 ret
= nfserr_old_stateid
;
3362 if (stateid
->si_generation
> stp
->st_stateid
.si_generation
) {
3363 ret
= nfserr_bad_stateid
;
3368 if (stp
->st_type
== NFS4_OPEN_STID
) {
3369 ret
= nfserr_locks_held
;
3372 ret
= nfsd4_free_lock_stateid(stp
);
3377 nfs4_unlock_state();
3384 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3385 RD_STATE
: WR_STATE
;
3389 * Checks for sequence id mutating operations.
3392 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3393 stateid_t
*stateid
, int flags
,
3394 struct nfs4_stateowner
**sopp
,
3395 struct nfs4_stateid
**stpp
)
3397 struct nfs4_stateid
*stp
;
3398 struct nfs4_stateowner
*sop
;
3399 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3402 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3403 seqid
, STATEID_VAL(stateid
));
3408 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
3409 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
3410 return nfserr_bad_stateid
;
3413 if (STALE_STATEID(stateid
))
3414 return nfserr_stale_stateid
;
3417 * We return BAD_STATEID if filehandle doesn't match stateid,
3418 * the confirmed flag is incorrecly set, or the generation
3419 * number is incorrect.
3421 stp
= find_stateid(stateid
, flags
);
3424 * Also, we should make sure this isn't just the result of
3427 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
3428 /* It's not stale; let's assume it's expired: */
3430 return nfserr_expired
;
3436 *sopp
= sop
= stp
->st_stateowner
;
3438 if (nfs4_check_fh(current_fh
, stp
)) {
3439 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
3440 return nfserr_bad_stateid
;
3444 * We now validate the seqid and stateid generation numbers.
3445 * For the moment, we ignore the possibility of
3446 * generation number wraparound.
3448 if (!nfsd4_has_session(cstate
) && seqid
!= sop
->so_seqid
)
3451 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
3452 dprintk("NFSD: preprocess_seqid_op: expected"
3453 " unconfirmed stateowner!\n");
3454 return nfserr_bad_stateid
;
3456 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
3457 dprintk("NFSD: preprocess_seqid_op: stateowner not"
3458 " confirmed yet!\n");
3459 return nfserr_bad_stateid
;
3461 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, nfsd4_has_session(cstate
));
3464 renew_client(sop
->so_client
);
3468 if (seqid
== sop
->so_seqid
- 1) {
3469 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
3470 /* indicate replay to calling function */
3471 return nfserr_replay_me
;
3473 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
3474 sop
->so_seqid
, seqid
);
3476 return nfserr_bad_seqid
;
3480 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3481 struct nfsd4_open_confirm
*oc
)
3484 struct nfs4_stateowner
*sop
;
3485 struct nfs4_stateid
*stp
;
3487 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3488 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3489 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3491 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3497 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3498 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3499 CONFIRM
| OPEN_STATE
,
3500 &oc
->oc_stateowner
, &stp
)))
3503 sop
= oc
->oc_stateowner
;
3504 sop
->so_confirmed
= 1;
3505 update_stateid(&stp
->st_stateid
);
3506 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3507 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3508 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3510 nfsd4_create_clid_dir(sop
->so_client
);
3512 if (oc
->oc_stateowner
) {
3513 nfs4_get_stateowner(oc
->oc_stateowner
);
3514 cstate
->replay_owner
= oc
->oc_stateowner
;
3516 nfs4_unlock_state();
3520 static inline void nfs4_file_downgrade(struct nfs4_stateid
*stp
, unsigned int to_access
)
3524 for (i
= 1; i
< 4; i
++) {
3525 if (test_bit(i
, &stp
->st_access_bmap
) && !(i
& to_access
)) {
3526 nfs4_file_put_access(stp
->st_file
, i
);
3527 __clear_bit(i
, &stp
->st_access_bmap
);
3533 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3536 for (i
= 0; i
< 4; i
++) {
3537 if ((i
& deny
) != i
)
3538 __clear_bit(i
, bmap
);
3543 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3544 struct nfsd4_compound_state
*cstate
,
3545 struct nfsd4_open_downgrade
*od
)
3548 struct nfs4_stateid
*stp
;
3550 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3551 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3552 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3554 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3555 || !deny_valid(od
->od_share_deny
))
3556 return nfserr_inval
;
3559 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3563 &od
->od_stateowner
, &stp
)))
3566 status
= nfserr_inval
;
3567 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3568 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3569 stp
->st_access_bmap
, od
->od_share_access
);
3572 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3573 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3574 stp
->st_deny_bmap
, od
->od_share_deny
);
3577 nfs4_file_downgrade(stp
, od
->od_share_access
);
3579 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3581 update_stateid(&stp
->st_stateid
);
3582 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3585 if (od
->od_stateowner
) {
3586 nfs4_get_stateowner(od
->od_stateowner
);
3587 cstate
->replay_owner
= od
->od_stateowner
;
3589 nfs4_unlock_state();
3594 * nfs4_unlock_state() called after encode
3597 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3598 struct nfsd4_close
*close
)
3601 struct nfs4_stateid
*stp
;
3603 dprintk("NFSD: nfsd4_close on file %.*s\n",
3604 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3605 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3608 /* check close_lru for replay */
3609 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3612 OPEN_STATE
| CLOSE_STATE
,
3613 &close
->cl_stateowner
, &stp
)))
3616 update_stateid(&stp
->st_stateid
);
3617 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3619 /* release_stateid() calls nfsd_close() if needed */
3620 release_open_stateid(stp
);
3622 /* place unused nfs4_stateowners on so_close_lru list to be
3623 * released by the laundromat service after the lease period
3624 * to enable us to handle CLOSE replay
3626 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3627 move_to_close_lru(close
->cl_stateowner
);
3629 if (close
->cl_stateowner
) {
3630 nfs4_get_stateowner(close
->cl_stateowner
);
3631 cstate
->replay_owner
= close
->cl_stateowner
;
3633 nfs4_unlock_state();
3638 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3639 struct nfsd4_delegreturn
*dr
)
3641 struct nfs4_delegation
*dp
;
3642 stateid_t
*stateid
= &dr
->dr_stateid
;
3643 struct inode
*inode
;
3646 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3648 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3651 status
= nfserr_bad_stateid
;
3652 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3654 status
= nfserr_stale_stateid
;
3655 if (STALE_STATEID(stateid
))
3657 status
= nfserr_bad_stateid
;
3658 if (!is_delegation_stateid(stateid
))
3660 status
= nfserr_expired
;
3661 dp
= find_delegation_stateid(inode
, stateid
);
3664 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3667 renew_client(dp
->dl_client
);
3669 unhash_delegation(dp
);
3671 nfs4_unlock_state();
3678 * Lock owner state (byte-range locks)
3680 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3681 #define LOCK_HASH_BITS 8
3682 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3683 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3686 end_offset(u64 start
, u64 len
)
3691 return end
>= start
? end
: NFS4_MAX_UINT64
;
3694 /* last octet in a range */
3696 last_byte_offset(u64 start
, u64 len
)
3702 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3705 static unsigned int lockownerid_hashval(u32 id
)
3707 return id
& LOCK_HASH_MASK
;
3710 static inline unsigned int
3711 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3712 struct xdr_netobj
*ownername
)
3714 return (file_hashval(inode
) + cl_id
3715 + opaque_hashval(ownername
->data
, ownername
->len
))
3719 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3720 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3721 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3724 same_stateid(stateid_t
*id_one
, stateid_t
*id_two
)
3726 if (id_one
->si_stateownerid
!= id_two
->si_stateownerid
)
3728 return id_one
->si_fileid
== id_two
->si_fileid
;
3731 static struct nfs4_stateid
*
3732 find_stateid(stateid_t
*stid
, int flags
)
3734 struct nfs4_stateid
*local
;
3735 u32 st_id
= stid
->si_stateownerid
;
3736 u32 f_id
= stid
->si_fileid
;
3737 unsigned int hashval
;
3739 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3740 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3741 hashval
= stateid_hashval(st_id
, f_id
);
3742 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3743 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3744 (local
->st_stateid
.si_fileid
== f_id
))
3749 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3750 hashval
= stateid_hashval(st_id
, f_id
);
3751 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3752 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3753 (local
->st_stateid
.si_fileid
== f_id
))
3760 static struct nfs4_stateid
*
3761 search_for_stateid(stateid_t
*stid
)
3763 struct nfs4_stateid
*local
;
3764 unsigned int hashval
= stateid_hashval(stid
->si_stateownerid
, stid
->si_fileid
);
3766 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3767 if (same_stateid(&local
->st_stateid
, stid
))
3771 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3772 if (same_stateid(&local
->st_stateid
, stid
))
3778 static struct nfs4_delegation
*
3779 search_for_delegation(stateid_t
*stid
)
3781 struct nfs4_file
*fp
;
3782 struct nfs4_delegation
*dp
;
3783 struct list_head
*pos
;
3786 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3787 list_for_each_entry(fp
, &file_hashtbl
[i
], fi_hash
) {
3788 list_for_each(pos
, &fp
->fi_delegations
) {
3789 dp
= list_entry(pos
, struct nfs4_delegation
, dl_perfile
);
3790 if (same_stateid(&dp
->dl_stateid
, stid
))
3798 static struct nfs4_delegation
*
3799 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3801 struct nfs4_file
*fp
;
3802 struct nfs4_delegation
*dl
;
3804 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3807 fp
= find_file(ino
);
3810 dl
= find_delegation_file(fp
, stid
);
3816 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3817 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3818 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3819 * locking, this prevents us from being completely protocol-compliant. The
3820 * real solution to this problem is to start using unsigned file offsets in
3821 * the VFS, but this is a very deep change!
3824 nfs4_transform_lock_offset(struct file_lock
*lock
)
3826 if (lock
->fl_start
< 0)
3827 lock
->fl_start
= OFFSET_MAX
;
3828 if (lock
->fl_end
< 0)
3829 lock
->fl_end
= OFFSET_MAX
;
3832 /* Hack!: For now, we're defining this just so we can use a pointer to it
3833 * as a unique cookie to identify our (NFSv4's) posix locks. */
3834 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3838 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3840 struct nfs4_stateowner
*sop
;
3842 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3843 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3844 kref_get(&sop
->so_ref
);
3846 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3848 deny
->ld_sop
= NULL
;
3849 deny
->ld_clientid
.cl_boot
= 0;
3850 deny
->ld_clientid
.cl_id
= 0;
3852 deny
->ld_start
= fl
->fl_start
;
3853 deny
->ld_length
= NFS4_MAX_UINT64
;
3854 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3855 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3856 deny
->ld_type
= NFS4_READ_LT
;
3857 if (fl
->fl_type
!= F_RDLCK
)
3858 deny
->ld_type
= NFS4_WRITE_LT
;
3861 static struct nfs4_stateowner
*
3862 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3863 struct xdr_netobj
*owner
)
3865 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3866 struct nfs4_stateowner
*op
;
3868 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3869 if (same_owner_str(op
, owner
, clid
))
3875 static void hash_lockowner(struct nfs4_stateowner
*sop
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
)
3877 unsigned int idhashval
;
3879 idhashval
= lockownerid_hashval(sop
->so_id
);
3880 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3881 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3882 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3886 * Alloc a lock owner structure.
3887 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3890 * strhashval = lock_ownerstr_hashval
3893 static struct nfs4_stateowner
*
3894 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3895 struct nfs4_stateowner
*sop
;
3897 sop
= alloc_stateowner(&lock
->lk_new_owner
, clp
);
3900 INIT_LIST_HEAD(&sop
->so_stateids
);
3901 sop
->so_is_open_owner
= 0;
3902 /* It is the openowner seqid that will be incremented in encode in the
3903 * case of new lockowners; so increment the lock seqid manually: */
3904 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3905 sop
->so_confirmed
= 1;
3906 hash_lockowner(sop
, strhashval
, clp
, open_stp
);
3910 static struct nfs4_stateid
*
3911 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3913 struct nfs4_stateid
*stp
;
3914 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3916 stp
= nfs4_alloc_stateid();
3919 INIT_LIST_HEAD(&stp
->st_hash
);
3920 INIT_LIST_HEAD(&stp
->st_perfile
);
3921 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3922 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3923 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3924 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3925 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3926 stp
->st_stateowner
= sop
;
3927 stp
->st_type
= NFS4_LOCK_STID
;
3930 stp
->st_stateid
.si_boot
= boot_time
;
3931 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3932 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3933 stp
->st_stateid
.si_generation
= 0;
3934 stp
->st_access_bmap
= 0;
3935 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3936 stp
->st_openstp
= open_stp
;
3943 check_lock_length(u64 offset
, u64 length
)
3945 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3946 LOFF_OVERFLOW(offset
, length
)));
3949 static void get_lock_access(struct nfs4_stateid
*lock_stp
, u32 access
)
3951 struct nfs4_file
*fp
= lock_stp
->st_file
;
3952 int oflag
= nfs4_access_to_omode(access
);
3954 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3956 nfs4_file_get_access(fp
, oflag
);
3957 __set_bit(access
, &lock_stp
->st_access_bmap
);
3964 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3965 struct nfsd4_lock
*lock
)
3967 struct nfs4_stateowner
*open_sop
= NULL
;
3968 struct nfs4_stateowner
*lock_sop
= NULL
;
3969 struct nfs4_stateid
*lock_stp
;
3970 struct nfs4_file
*fp
;
3971 struct file
*filp
= NULL
;
3972 struct file_lock file_lock
;
3973 struct file_lock conflock
;
3975 unsigned int strhashval
;
3979 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3980 (long long) lock
->lk_offset
,
3981 (long long) lock
->lk_length
);
3983 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3984 return nfserr_inval
;
3986 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3987 S_IFREG
, NFSD_MAY_LOCK
))) {
3988 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3994 if (lock
->lk_is_new
) {
3996 * Client indicates that this is a new lockowner.
3997 * Use open owner and open stateid to create lock owner and
4000 struct nfs4_stateid
*open_stp
= NULL
;
4002 status
= nfserr_stale_clientid
;
4003 if (!nfsd4_has_session(cstate
) &&
4004 STALE_CLIENTID(&lock
->lk_new_clientid
))
4007 /* validate and update open stateid and open seqid */
4008 status
= nfs4_preprocess_seqid_op(cstate
,
4009 lock
->lk_new_open_seqid
,
4010 &lock
->lk_new_open_stateid
,
4012 &lock
->lk_replay_owner
, &open_stp
);
4015 status
= nfserr_bad_stateid
;
4016 open_sop
= lock
->lk_replay_owner
;
4017 if (!nfsd4_has_session(cstate
) &&
4018 !same_clid(&open_sop
->so_client
->cl_clientid
,
4019 &lock
->v
.new.clientid
))
4021 /* create lockowner and lock stateid */
4022 fp
= open_stp
->st_file
;
4023 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
4024 open_sop
->so_client
->cl_clientid
.cl_id
,
4025 &lock
->v
.new.owner
);
4026 /* XXX: Do we need to check for duplicate stateowners on
4027 * the same file, or should they just be allowed (and
4028 * create new stateids)? */
4029 status
= nfserr_jukebox
;
4030 lock_sop
= alloc_init_lock_stateowner(strhashval
,
4031 open_sop
->so_client
, open_stp
, lock
);
4032 if (lock_sop
== NULL
)
4034 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
4035 if (lock_stp
== NULL
)
4038 /* lock (lock owner + lock stateid) already exists */
4039 status
= nfs4_preprocess_seqid_op(cstate
,
4040 lock
->lk_old_lock_seqid
,
4041 &lock
->lk_old_lock_stateid
,
4043 &lock
->lk_replay_owner
, &lock_stp
);
4046 lock_sop
= lock
->lk_replay_owner
;
4047 fp
= lock_stp
->st_file
;
4049 /* lock->lk_replay_owner and lock_stp have been created or found */
4051 lkflg
= setlkflg(lock
->lk_type
);
4052 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4056 status
= nfserr_grace
;
4057 if (locks_in_grace() && !lock
->lk_reclaim
)
4059 status
= nfserr_no_grace
;
4060 if (!locks_in_grace() && lock
->lk_reclaim
)
4063 locks_init_lock(&file_lock
);
4064 switch (lock
->lk_type
) {
4067 filp
= find_readable_file(lock_stp
->st_file
);
4069 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4070 file_lock
.fl_type
= F_RDLCK
;
4073 case NFS4_WRITEW_LT
:
4074 filp
= find_writeable_file(lock_stp
->st_file
);
4076 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4077 file_lock
.fl_type
= F_WRLCK
;
4080 status
= nfserr_inval
;
4084 status
= nfserr_openmode
;
4087 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4088 file_lock
.fl_pid
= current
->tgid
;
4089 file_lock
.fl_file
= filp
;
4090 file_lock
.fl_flags
= FL_POSIX
;
4091 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4093 file_lock
.fl_start
= lock
->lk_offset
;
4094 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4095 nfs4_transform_lock_offset(&file_lock
);
4098 * Try to lock the file in the VFS.
4099 * Note: locks.c uses the BKL to protect the inode's lock list.
4102 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4104 case 0: /* success! */
4105 update_stateid(&lock_stp
->st_stateid
);
4106 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
4110 case (EAGAIN
): /* conflock holds conflicting lock */
4111 status
= nfserr_denied
;
4112 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4113 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4116 status
= nfserr_deadlock
;
4119 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4120 status
= nfserrno(err
);
4124 if (status
&& lock
->lk_is_new
&& lock_sop
)
4125 release_lockowner(lock_sop
);
4126 if (lock
->lk_replay_owner
) {
4127 nfs4_get_stateowner(lock
->lk_replay_owner
);
4128 cstate
->replay_owner
= lock
->lk_replay_owner
;
4130 nfs4_unlock_state();
4135 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4136 * so we do a temporary open here just to get an open file to pass to
4137 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4140 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4145 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4148 err
= vfs_test_lock(file
, lock
);
4157 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4158 struct nfsd4_lockt
*lockt
)
4160 struct inode
*inode
;
4161 struct file_lock file_lock
;
4165 if (locks_in_grace())
4166 return nfserr_grace
;
4168 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4169 return nfserr_inval
;
4171 lockt
->lt_stateowner
= NULL
;
4174 status
= nfserr_stale_clientid
;
4175 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4178 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4181 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4182 locks_init_lock(&file_lock
);
4183 switch (lockt
->lt_type
) {
4186 file_lock
.fl_type
= F_RDLCK
;
4189 case NFS4_WRITEW_LT
:
4190 file_lock
.fl_type
= F_WRLCK
;
4193 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4194 status
= nfserr_inval
;
4198 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
4199 &lockt
->lt_clientid
, &lockt
->lt_owner
);
4200 if (lockt
->lt_stateowner
)
4201 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
4202 file_lock
.fl_pid
= current
->tgid
;
4203 file_lock
.fl_flags
= FL_POSIX
;
4205 file_lock
.fl_start
= lockt
->lt_offset
;
4206 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4208 nfs4_transform_lock_offset(&file_lock
);
4211 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4213 status
= nfserrno(error
);
4216 if (file_lock
.fl_type
!= F_UNLCK
) {
4217 status
= nfserr_denied
;
4218 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4221 nfs4_unlock_state();
4226 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4227 struct nfsd4_locku
*locku
)
4229 struct nfs4_stateid
*stp
;
4230 struct file
*filp
= NULL
;
4231 struct file_lock file_lock
;
4235 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4236 (long long) locku
->lu_offset
,
4237 (long long) locku
->lu_length
);
4239 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4240 return nfserr_inval
;
4244 if ((status
= nfs4_preprocess_seqid_op(cstate
,
4248 &locku
->lu_stateowner
, &stp
)))
4251 filp
= find_any_file(stp
->st_file
);
4253 status
= nfserr_lock_range
;
4257 locks_init_lock(&file_lock
);
4258 file_lock
.fl_type
= F_UNLCK
;
4259 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
4260 file_lock
.fl_pid
= current
->tgid
;
4261 file_lock
.fl_file
= filp
;
4262 file_lock
.fl_flags
= FL_POSIX
;
4263 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4264 file_lock
.fl_start
= locku
->lu_offset
;
4266 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4267 nfs4_transform_lock_offset(&file_lock
);
4270 * Try to unlock the file in the VFS.
4272 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4274 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4278 * OK, unlock succeeded; the only thing left to do is update the stateid.
4280 update_stateid(&stp
->st_stateid
);
4281 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
4284 if (locku
->lu_stateowner
) {
4285 nfs4_get_stateowner(locku
->lu_stateowner
);
4286 cstate
->replay_owner
= locku
->lu_stateowner
;
4288 nfs4_unlock_state();
4292 status
= nfserrno(err
);
4298 * 1: locks held by lockowner
4299 * 0: no locks held by lockowner
4302 check_for_locks(struct nfs4_file
*filp
, struct nfs4_stateowner
*lowner
)
4304 struct file_lock
**flpp
;
4305 struct inode
*inode
= filp
->fi_inode
;
4309 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4310 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4321 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4322 struct nfsd4_compound_state
*cstate
,
4323 struct nfsd4_release_lockowner
*rlockowner
)
4325 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4326 struct nfs4_stateowner
*sop
;
4327 struct nfs4_stateid
*stp
;
4328 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4329 struct list_head matches
;
4333 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4334 clid
->cl_boot
, clid
->cl_id
);
4336 /* XXX check for lease expiration */
4338 status
= nfserr_stale_clientid
;
4339 if (STALE_CLIENTID(clid
))
4344 status
= nfserr_locks_held
;
4345 /* XXX: we're doing a linear search through all the lockowners.
4346 * Yipes! For now we'll just hope clients aren't really using
4347 * release_lockowner much, but eventually we have to fix these
4348 * data structures. */
4349 INIT_LIST_HEAD(&matches
);
4350 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4351 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4352 if (!same_owner_str(sop
, owner
, clid
))
4354 list_for_each_entry(stp
, &sop
->so_stateids
,
4356 if (check_for_locks(stp
->st_file
, sop
))
4358 /* Note: so_perclient unused for lockowners,
4359 * so it's OK to fool with here. */
4360 list_add(&sop
->so_perclient
, &matches
);
4364 /* Clients probably won't expect us to return with some (but not all)
4365 * of the lockowner state released; so don't release any until all
4366 * have been checked. */
4368 while (!list_empty(&matches
)) {
4369 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
4371 /* unhash_stateowner deletes so_perclient only
4372 * for openowners. */
4373 list_del(&sop
->so_perclient
);
4374 release_lockowner(sop
);
4377 nfs4_unlock_state();
4381 static inline struct nfs4_client_reclaim
*
4384 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4388 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4390 unsigned int strhashval
= clientstr_hashval(name
);
4391 struct nfs4_client
*clp
;
4393 clp
= find_confirmed_client_by_str(name
, strhashval
);
4398 * failure => all reset bets are off, nfserr_no_grace...
4401 nfs4_client_to_reclaim(const char *name
)
4403 unsigned int strhashval
;
4404 struct nfs4_client_reclaim
*crp
= NULL
;
4406 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4407 crp
= alloc_reclaim();
4410 strhashval
= clientstr_hashval(name
);
4411 INIT_LIST_HEAD(&crp
->cr_strhash
);
4412 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4413 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4414 reclaim_str_hashtbl_size
++;
4419 nfs4_release_reclaim(void)
4421 struct nfs4_client_reclaim
*crp
= NULL
;
4424 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4425 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4426 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4427 struct nfs4_client_reclaim
, cr_strhash
);
4428 list_del(&crp
->cr_strhash
);
4430 reclaim_str_hashtbl_size
--;
4433 BUG_ON(reclaim_str_hashtbl_size
);
4437 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4438 static struct nfs4_client_reclaim
*
4439 nfs4_find_reclaim_client(clientid_t
*clid
)
4441 unsigned int strhashval
;
4442 struct nfs4_client
*clp
;
4443 struct nfs4_client_reclaim
*crp
= NULL
;
4446 /* find clientid in conf_id_hashtbl */
4447 clp
= find_confirmed_client(clid
);
4451 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4452 clp
->cl_name
.len
, clp
->cl_name
.data
,
4455 /* find clp->cl_name in reclaim_str_hashtbl */
4456 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4457 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4458 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4466 * Called from OPEN. Look for clientid in reclaim list.
4469 nfs4_check_open_reclaim(clientid_t
*clid
)
4471 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4474 /* initialization to perform at module load time: */
4477 nfs4_state_init(void)
4481 status
= nfsd4_init_slabs();
4484 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4485 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4486 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4487 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4488 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4489 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4491 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4492 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4493 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4494 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4496 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4497 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4498 INIT_LIST_HEAD(&open_ownerid_hashtbl
[i
]);
4500 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
4501 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4502 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
4504 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4505 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4506 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4508 memset(&onestateid
, ~0, sizeof(stateid_t
));
4509 INIT_LIST_HEAD(&close_lru
);
4510 INIT_LIST_HEAD(&client_lru
);
4511 INIT_LIST_HEAD(&del_recall_lru
);
4512 reclaim_str_hashtbl_size
= 0;
4517 nfsd4_load_reboot_recovery_data(void)
4522 nfsd4_init_recdir();
4523 status
= nfsd4_recdir_load();
4524 nfs4_unlock_state();
4526 printk("NFSD: Failure reading reboot recovery data\n");
4530 * Since the lifetime of a delegation isn't limited to that of an open, a
4531 * client may quite reasonably hang on to a delegation as long as it has
4532 * the inode cached. This becomes an obvious problem the first time a
4533 * client's inode cache approaches the size of the server's total memory.
4535 * For now we avoid this problem by imposing a hard limit on the number
4536 * of delegations, which varies according to the server's memory size.
4539 set_max_delegations(void)
4542 * Allow at most 4 delegations per megabyte of RAM. Quick
4543 * estimates suggest that in the worst case (where every delegation
4544 * is for a different inode), a delegation could take about 1.5K,
4545 * giving a worst case usage of about 6% of memory.
4547 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4550 /* initialization to perform when the nfsd service is started: */
4553 __nfs4_state_start(void)
4557 boot_time
= get_seconds();
4558 locks_start_grace(&nfsd4_manager
);
4559 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4561 ret
= set_callback_cred();
4564 laundry_wq
= create_singlethread_workqueue("nfsd4");
4565 if (laundry_wq
== NULL
)
4567 ret
= nfsd4_create_callback_queue();
4569 goto out_free_laundry
;
4570 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4571 set_max_delegations();
4574 destroy_workqueue(laundry_wq
);
4579 nfs4_state_start(void)
4581 nfsd4_load_reboot_recovery_data();
4582 return __nfs4_state_start();
4586 __nfs4_state_shutdown(void)
4589 struct nfs4_client
*clp
= NULL
;
4590 struct nfs4_delegation
*dp
= NULL
;
4591 struct list_head
*pos
, *next
, reaplist
;
4593 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4594 while (!list_empty(&conf_id_hashtbl
[i
])) {
4595 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4598 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4599 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4603 INIT_LIST_HEAD(&reaplist
);
4604 spin_lock(&recall_lock
);
4605 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4606 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4607 list_move(&dp
->dl_recall_lru
, &reaplist
);
4609 spin_unlock(&recall_lock
);
4610 list_for_each_safe(pos
, next
, &reaplist
) {
4611 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4612 list_del_init(&dp
->dl_recall_lru
);
4613 unhash_delegation(dp
);
4616 nfsd4_shutdown_recdir();
4620 nfs4_state_shutdown(void)
4622 cancel_delayed_work_sync(&laundromat_work
);
4623 destroy_workqueue(laundry_wq
);
4624 locks_end_grace(&nfsd4_manager
);
4626 nfs4_release_reclaim();
4627 __nfs4_state_shutdown();
4628 nfs4_unlock_state();
4629 nfsd4_destroy_callback_queue();