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 stateid_t zerostateid
; /* bits all 0 */
53 static stateid_t onestateid
; /* bits all 1 */
54 static u64 current_sessionid
= 1;
56 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
57 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
59 /* forward declarations */
60 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
64 /* Currently used for almost all code touching nfsv4 state: */
65 static DEFINE_MUTEX(client_mutex
);
68 * Currently used for the del_recall_lru and file hash table. In an
69 * effort to decrease the scope of the client_mutex, this spinlock may
70 * eventually cover more:
72 static DEFINE_SPINLOCK(recall_lock
);
74 static struct kmem_cache
*openowner_slab
= NULL
;
75 static struct kmem_cache
*lockowner_slab
= NULL
;
76 static struct kmem_cache
*file_slab
= NULL
;
77 static struct kmem_cache
*stateid_slab
= NULL
;
78 static struct kmem_cache
*deleg_slab
= NULL
;
83 mutex_lock(&client_mutex
);
87 nfs4_unlock_state(void)
89 mutex_unlock(&client_mutex
);
93 opaque_hashval(const void *ptr
, int nbytes
)
95 unsigned char *cptr
= (unsigned char *) ptr
;
105 static struct list_head del_recall_lru
;
108 put_nfs4_file(struct nfs4_file
*fi
)
110 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
111 list_del(&fi
->fi_hash
);
112 spin_unlock(&recall_lock
);
114 kmem_cache_free(file_slab
, fi
);
119 get_nfs4_file(struct nfs4_file
*fi
)
121 atomic_inc(&fi
->fi_ref
);
124 static int num_delegations
;
125 unsigned int max_delegations
;
128 * Open owner state (share locks)
131 /* hash tables for open owners */
132 #define OPEN_OWNER_HASH_BITS 8
133 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
134 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
136 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
140 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
142 return ret
& OPEN_OWNER_HASH_MASK
;
145 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
147 /* hash table for nfs4_file */
148 #define FILE_HASH_BITS 8
149 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
151 static unsigned int file_hashval(struct inode
*ino
)
153 /* XXX: why are we hashing on inode pointer, anyway? */
154 return hash_ptr(ino
, FILE_HASH_BITS
);
157 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
159 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
161 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
162 atomic_inc(&fp
->fi_access
[oflag
]);
165 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
167 if (oflag
== O_RDWR
) {
168 __nfs4_file_get_access(fp
, O_RDONLY
);
169 __nfs4_file_get_access(fp
, O_WRONLY
);
171 __nfs4_file_get_access(fp
, oflag
);
174 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
176 if (fp
->fi_fds
[oflag
]) {
177 fput(fp
->fi_fds
[oflag
]);
178 fp
->fi_fds
[oflag
] = NULL
;
182 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
184 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
185 nfs4_file_put_fd(fp
, oflag
);
187 * It's also safe to get rid of the RDWR open *if*
188 * we no longer have need of the other kind of access
189 * or if we already have the other kind of open:
191 if (fp
->fi_fds
[1-oflag
]
192 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
193 nfs4_file_put_fd(fp
, O_RDWR
);
197 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
199 if (oflag
== O_RDWR
) {
200 __nfs4_file_put_access(fp
, O_RDONLY
);
201 __nfs4_file_put_access(fp
, O_WRONLY
);
203 __nfs4_file_put_access(fp
, oflag
);
206 static inline int get_new_stid(struct nfs4_stid
*stid
)
208 static int min_stateid
= 0;
209 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
213 if (!idr_pre_get(stateids
, GFP_KERNEL
))
216 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
218 * All this code is currently serialized; the preallocation
219 * above should still be ours:
223 * It shouldn't be a problem to reuse an opaque stateid value.
224 * I don't think it is for 4.1. But with 4.0 I worry that, for
225 * example, a stray write retransmission could be accepted by
226 * the server when it should have been rejected. Therefore,
227 * adopt a trick from the sctp code to attempt to maximize the
228 * amount of time until an id is reused, by ensuring they always
229 * "increase" (mod INT_MAX):
232 min_stateid
= new_stid
+1;
233 if (min_stateid
== INT_MAX
)
238 static inline __be32
init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
240 stateid_t
*s
= &stid
->sc_stateid
;
243 stid
->sc_type
= type
;
244 stid
->sc_client
= cl
;
245 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
246 new_id
= get_new_stid(stid
);
248 return nfserr_jukebox
;
249 s
->si_opaque
.so_id
= (u32
)new_id
;
250 /* Will be incremented before return to client: */
251 s
->si_generation
= 0;
255 static struct nfs4_delegation
*
256 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
258 struct nfs4_delegation
*dp
;
259 struct nfs4_file
*fp
= stp
->st_file
;
262 dprintk("NFSD alloc_init_deleg\n");
264 * Major work on the lease subsystem (for example, to support
265 * calbacks on stat) will be required before we can support
266 * write delegations properly.
268 if (type
!= NFS4_OPEN_DELEGATE_READ
)
270 if (fp
->fi_had_conflict
)
272 if (num_delegations
> max_delegations
)
274 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
277 status
= init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
279 kmem_cache_free(deleg_slab
, dp
);
283 * delegation seqid's are never incremented. The 4.1 special
284 * meaning of seqid 0 isn't meaningful, really, but let's avoid
285 * 0 anyway just for consistency and use 1:
287 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
289 INIT_LIST_HEAD(&dp
->dl_perfile
);
290 INIT_LIST_HEAD(&dp
->dl_perclnt
);
291 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
295 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
297 atomic_set(&dp
->dl_count
, 1);
298 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
303 nfs4_put_delegation(struct nfs4_delegation
*dp
)
305 if (atomic_dec_and_test(&dp
->dl_count
)) {
306 dprintk("NFSD: freeing dp %p\n",dp
);
307 put_nfs4_file(dp
->dl_file
);
308 kmem_cache_free(deleg_slab
, dp
);
313 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
315 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
316 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
318 fput(fp
->fi_deleg_file
);
319 fp
->fi_deleg_file
= NULL
;
323 static void unhash_stid(struct nfs4_stid
*s
)
325 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
327 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
330 /* Called under the state lock. */
332 unhash_delegation(struct nfs4_delegation
*dp
)
334 unhash_stid(&dp
->dl_stid
);
335 list_del_init(&dp
->dl_perclnt
);
336 spin_lock(&recall_lock
);
337 list_del_init(&dp
->dl_perfile
);
338 list_del_init(&dp
->dl_recall_lru
);
339 spin_unlock(&recall_lock
);
340 nfs4_put_deleg_lease(dp
->dl_file
);
341 nfs4_put_delegation(dp
);
348 /* client_lock protects the client lru list and session hash table */
349 static DEFINE_SPINLOCK(client_lock
);
351 /* Hash tables for nfs4_clientid state */
352 #define CLIENT_HASH_BITS 4
353 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
354 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
356 static unsigned int clientid_hashval(u32 id
)
358 return id
& CLIENT_HASH_MASK
;
361 static unsigned int clientstr_hashval(const char *name
)
363 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
367 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
368 * used in reboot/reset lease grace period processing
370 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
371 * setclientid_confirmed info.
373 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
376 * client_lru holds client queue ordered by nfs4_client.cl_time
379 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
380 * for last close replay.
382 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
383 static int reclaim_str_hashtbl_size
= 0;
384 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
385 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
386 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
387 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
388 static struct list_head client_lru
;
389 static struct list_head close_lru
;
392 * We store the NONE, READ, WRITE, and BOTH bits separately in the
393 * st_{access,deny}_bmap field of the stateid, in order to track not
394 * only what share bits are currently in force, but also what
395 * combinations of share bits previous opens have used. This allows us
396 * to enforce the recommendation of rfc 3530 14.2.19 that the server
397 * return an error if the client attempt to downgrade to a combination
398 * of share bits not explicable by closing some of its previous opens.
400 * XXX: This enforcement is actually incomplete, since we don't keep
401 * track of access/deny bit combinations; so, e.g., we allow:
403 * OPEN allow read, deny write
404 * OPEN allow both, deny none
405 * DOWNGRADE allow read, deny none
407 * which we should reject.
410 set_access(unsigned int *access
, unsigned long bmap
) {
414 for (i
= 1; i
< 4; i
++) {
415 if (test_bit(i
, &bmap
))
421 set_deny(unsigned int *deny
, unsigned long bmap
) {
425 for (i
= 0; i
< 4; i
++) {
426 if (test_bit(i
, &bmap
))
432 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
433 unsigned int access
, deny
;
435 set_access(&access
, stp
->st_access_bmap
);
436 set_deny(&deny
, stp
->st_deny_bmap
);
437 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
442 static int nfs4_access_to_omode(u32 access
)
444 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
445 case NFS4_SHARE_ACCESS_READ
:
447 case NFS4_SHARE_ACCESS_WRITE
:
449 case NFS4_SHARE_ACCESS_BOTH
:
455 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
457 list_del(&stp
->st_perfile
);
458 list_del(&stp
->st_perstateowner
);
461 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
465 if (stp
->st_access_bmap
) {
466 for (i
= 1; i
< 4; i
++) {
467 if (test_bit(i
, &stp
->st_access_bmap
))
468 nfs4_file_put_access(stp
->st_file
,
469 nfs4_access_to_omode(i
));
470 __clear_bit(i
, &stp
->st_access_bmap
);
473 put_nfs4_file(stp
->st_file
);
477 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
479 kmem_cache_free(stateid_slab
, stp
);
482 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
486 unhash_generic_stateid(stp
);
487 unhash_stid(&stp
->st_stid
);
488 file
= find_any_file(stp
->st_file
);
490 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
491 close_generic_stateid(stp
);
492 free_generic_stateid(stp
);
495 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
497 struct nfs4_ol_stateid
*stp
;
499 list_del(&lo
->lo_owner
.so_strhash
);
500 list_del(&lo
->lo_perstateid
);
501 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
502 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
503 struct nfs4_ol_stateid
, st_perstateowner
);
504 release_lock_stateid(stp
);
508 static void release_lockowner(struct nfs4_lockowner
*lo
)
510 unhash_lockowner(lo
);
511 nfs4_free_lockowner(lo
);
515 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
517 struct nfs4_lockowner
*lo
;
519 while (!list_empty(&open_stp
->st_lockowners
)) {
520 lo
= list_entry(open_stp
->st_lockowners
.next
,
521 struct nfs4_lockowner
, lo_perstateid
);
522 release_lockowner(lo
);
526 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
528 unhash_generic_stateid(stp
);
529 release_stateid_lockowners(stp
);
530 close_generic_stateid(stp
);
533 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
535 unhash_open_stateid(stp
);
536 unhash_stid(&stp
->st_stid
);
537 free_generic_stateid(stp
);
540 static void unhash_openowner(struct nfs4_openowner
*oo
)
542 struct nfs4_ol_stateid
*stp
;
544 list_del(&oo
->oo_owner
.so_strhash
);
545 list_del(&oo
->oo_perclient
);
546 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
547 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
548 struct nfs4_ol_stateid
, st_perstateowner
);
549 release_open_stateid(stp
);
553 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
555 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
558 unhash_stid(&s
->st_stid
);
559 free_generic_stateid(s
);
560 oo
->oo_last_closed_stid
= NULL
;
564 static void release_openowner(struct nfs4_openowner
*oo
)
566 unhash_openowner(oo
);
567 list_del(&oo
->oo_close_lru
);
568 release_last_closed_stateid(oo
);
569 nfs4_free_openowner(oo
);
572 #define SESSION_HASH_SIZE 512
573 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
576 hash_sessionid(struct nfs4_sessionid
*sessionid
)
578 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
580 return sid
->sequence
% SESSION_HASH_SIZE
;
584 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
586 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
587 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
591 gen_sessionid(struct nfsd4_session
*ses
)
593 struct nfs4_client
*clp
= ses
->se_client
;
594 struct nfsd4_sessionid
*sid
;
596 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
597 sid
->clientid
= clp
->cl_clientid
;
598 sid
->sequence
= current_sessionid
++;
603 * The protocol defines ca_maxresponssize_cached to include the size of
604 * the rpc header, but all we need to cache is the data starting after
605 * the end of the initial SEQUENCE operation--the rest we regenerate
606 * each time. Therefore we can advertise a ca_maxresponssize_cached
607 * value that is the number of bytes in our cache plus a few additional
608 * bytes. In order to stay on the safe side, and not promise more than
609 * we can cache, those additional bytes must be the minimum possible: 24
610 * bytes of rpc header (xid through accept state, with AUTH_NULL
611 * verifier), 12 for the compound header (with zero-length tag), and 44
612 * for the SEQUENCE op response:
614 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
617 free_session_slots(struct nfsd4_session
*ses
)
621 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
622 kfree(ses
->se_slots
[i
]);
626 * We don't actually need to cache the rpc and session headers, so we
627 * can allocate a little less for each slot:
629 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
631 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
634 static int nfsd4_sanitize_slot_size(u32 size
)
636 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
637 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
643 * XXX: If we run out of reserved DRC memory we could (up to a point)
644 * re-negotiate active sessions and reduce their slot usage to make
645 * rooom for new connections. For now we just fail the create session.
647 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
651 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
653 spin_lock(&nfsd_drc_lock
);
654 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
655 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
656 num
= min_t(int, num
, avail
/ slotsize
);
657 nfsd_drc_mem_used
+= num
* slotsize
;
658 spin_unlock(&nfsd_drc_lock
);
663 static void nfsd4_put_drc_mem(int slotsize
, int num
)
665 spin_lock(&nfsd_drc_lock
);
666 nfsd_drc_mem_used
-= slotsize
* num
;
667 spin_unlock(&nfsd_drc_lock
);
670 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
672 struct nfsd4_session
*new;
675 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
676 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
677 mem
= numslots
* sizeof(struct nfsd4_slot
*);
679 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
682 /* allocate each struct nfsd4_slot and data cache in one piece */
683 for (i
= 0; i
< numslots
; i
++) {
684 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
685 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
686 if (!new->se_slots
[i
])
692 kfree(new->se_slots
[i
]);
697 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
699 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
701 new->maxreqs
= numslots
;
702 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
703 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
704 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
705 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
706 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
709 static void free_conn(struct nfsd4_conn
*c
)
711 svc_xprt_put(c
->cn_xprt
);
715 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
717 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
718 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
720 spin_lock(&clp
->cl_lock
);
721 if (!list_empty(&c
->cn_persession
)) {
722 list_del(&c
->cn_persession
);
725 spin_unlock(&clp
->cl_lock
);
726 nfsd4_probe_callback(clp
);
729 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
731 struct nfsd4_conn
*conn
;
733 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
736 svc_xprt_get(rqstp
->rq_xprt
);
737 conn
->cn_xprt
= rqstp
->rq_xprt
;
738 conn
->cn_flags
= flags
;
739 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
743 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
745 conn
->cn_session
= ses
;
746 list_add(&conn
->cn_persession
, &ses
->se_conns
);
749 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
751 struct nfs4_client
*clp
= ses
->se_client
;
753 spin_lock(&clp
->cl_lock
);
754 __nfsd4_hash_conn(conn
, ses
);
755 spin_unlock(&clp
->cl_lock
);
758 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
760 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
761 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
764 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
766 struct nfsd4_conn
*conn
;
769 conn
= alloc_conn(rqstp
, dir
);
771 return nfserr_jukebox
;
772 nfsd4_hash_conn(conn
, ses
);
773 ret
= nfsd4_register_conn(conn
);
775 /* oops; xprt is already down: */
776 nfsd4_conn_lost(&conn
->cn_xpt_user
);
780 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
782 u32 dir
= NFS4_CDFC4_FORE
;
784 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
785 dir
|= NFS4_CDFC4_BACK
;
787 return nfsd4_new_conn(rqstp
, ses
, dir
);
790 /* must be called under client_lock */
791 static void nfsd4_del_conns(struct nfsd4_session
*s
)
793 struct nfs4_client
*clp
= s
->se_client
;
794 struct nfsd4_conn
*c
;
796 spin_lock(&clp
->cl_lock
);
797 while (!list_empty(&s
->se_conns
)) {
798 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
799 list_del_init(&c
->cn_persession
);
800 spin_unlock(&clp
->cl_lock
);
802 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
805 spin_lock(&clp
->cl_lock
);
807 spin_unlock(&clp
->cl_lock
);
810 void free_session(struct kref
*kref
)
812 struct nfsd4_session
*ses
;
815 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
816 nfsd4_del_conns(ses
);
817 spin_lock(&nfsd_drc_lock
);
818 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
819 nfsd_drc_mem_used
-= mem
;
820 spin_unlock(&nfsd_drc_lock
);
821 free_session_slots(ses
);
825 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
827 struct nfsd4_session
*new;
828 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
829 int numslots
, slotsize
;
834 * Note decreasing slot size below client's request may
835 * make it difficult for client to function correctly, whereas
836 * decreasing the number of slots will (just?) affect
837 * performance. When short on memory we therefore prefer to
838 * decrease number of slots instead of their size.
840 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
841 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
845 new = alloc_session(slotsize
, numslots
);
847 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
850 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
852 new->se_client
= clp
;
855 INIT_LIST_HEAD(&new->se_conns
);
857 new->se_cb_seq_nr
= 1;
858 new->se_flags
= cses
->flags
;
859 new->se_cb_prog
= cses
->callback_prog
;
860 kref_init(&new->se_ref
);
861 idx
= hash_sessionid(&new->se_sessionid
);
862 spin_lock(&client_lock
);
863 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
864 spin_lock(&clp
->cl_lock
);
865 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
866 spin_unlock(&clp
->cl_lock
);
867 spin_unlock(&client_lock
);
869 status
= nfsd4_new_conn_from_crses(rqstp
, new);
870 /* whoops: benny points out, status is ignored! (err, or bogus) */
872 free_session(&new->se_ref
);
875 if (cses
->flags
& SESSION4_BACK_CHAN
) {
876 struct sockaddr
*sa
= svc_addr(rqstp
);
878 * This is a little silly; with sessions there's no real
879 * use for the callback address. Use the peer address
880 * as a reasonable default for now, but consider fixing
881 * the rpc client not to require an address in the
884 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
885 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
887 nfsd4_probe_callback(clp
);
891 /* caller must hold client_lock */
892 static struct nfsd4_session
*
893 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
895 struct nfsd4_session
*elem
;
898 dump_sessionid(__func__
, sessionid
);
899 idx
= hash_sessionid(sessionid
);
900 /* Search in the appropriate list */
901 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
902 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
903 NFS4_MAX_SESSIONID_LEN
)) {
908 dprintk("%s: session not found\n", __func__
);
912 /* caller must hold client_lock */
914 unhash_session(struct nfsd4_session
*ses
)
916 list_del(&ses
->se_hash
);
917 spin_lock(&ses
->se_client
->cl_lock
);
918 list_del(&ses
->se_perclnt
);
919 spin_unlock(&ses
->se_client
->cl_lock
);
922 /* must be called under the client_lock */
924 renew_client_locked(struct nfs4_client
*clp
)
926 if (is_client_expired(clp
)) {
927 dprintk("%s: client (clientid %08x/%08x) already expired\n",
929 clp
->cl_clientid
.cl_boot
,
930 clp
->cl_clientid
.cl_id
);
935 * Move client to the end to the LRU list.
937 dprintk("renewing client (clientid %08x/%08x)\n",
938 clp
->cl_clientid
.cl_boot
,
939 clp
->cl_clientid
.cl_id
);
940 list_move_tail(&clp
->cl_lru
, &client_lru
);
941 clp
->cl_time
= get_seconds();
945 renew_client(struct nfs4_client
*clp
)
947 spin_lock(&client_lock
);
948 renew_client_locked(clp
);
949 spin_unlock(&client_lock
);
952 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
954 STALE_CLIENTID(clientid_t
*clid
)
956 if (clid
->cl_boot
== boot_time
)
958 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
959 clid
->cl_boot
, clid
->cl_id
, boot_time
);
964 * XXX Should we use a slab cache ?
965 * This type of memory management is somewhat inefficient, but we use it
966 * anyway since SETCLIENTID is not a common operation.
968 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
970 struct nfs4_client
*clp
;
972 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
975 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
976 if (clp
->cl_name
.data
== NULL
) {
980 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
981 clp
->cl_name
.len
= name
.len
;
986 free_client(struct nfs4_client
*clp
)
988 while (!list_empty(&clp
->cl_sessions
)) {
989 struct nfsd4_session
*ses
;
990 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
992 list_del(&ses
->se_perclnt
);
993 nfsd4_put_session(ses
);
995 if (clp
->cl_cred
.cr_group_info
)
996 put_group_info(clp
->cl_cred
.cr_group_info
);
997 kfree(clp
->cl_principal
);
998 kfree(clp
->cl_name
.data
);
1003 release_session_client(struct nfsd4_session
*session
)
1005 struct nfs4_client
*clp
= session
->se_client
;
1007 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1009 if (is_client_expired(clp
)) {
1011 session
->se_client
= NULL
;
1013 renew_client_locked(clp
);
1014 spin_unlock(&client_lock
);
1017 /* must be called under the client_lock */
1019 unhash_client_locked(struct nfs4_client
*clp
)
1021 struct nfsd4_session
*ses
;
1023 mark_client_expired(clp
);
1024 list_del(&clp
->cl_lru
);
1025 spin_lock(&clp
->cl_lock
);
1026 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1027 list_del_init(&ses
->se_hash
);
1028 spin_unlock(&clp
->cl_lock
);
1032 expire_client(struct nfs4_client
*clp
)
1034 struct nfs4_openowner
*oo
;
1035 struct nfs4_delegation
*dp
;
1036 struct list_head reaplist
;
1038 INIT_LIST_HEAD(&reaplist
);
1039 spin_lock(&recall_lock
);
1040 while (!list_empty(&clp
->cl_delegations
)) {
1041 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1042 list_del_init(&dp
->dl_perclnt
);
1043 list_move(&dp
->dl_recall_lru
, &reaplist
);
1045 spin_unlock(&recall_lock
);
1046 while (!list_empty(&reaplist
)) {
1047 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1048 list_del_init(&dp
->dl_recall_lru
);
1049 unhash_delegation(dp
);
1051 while (!list_empty(&clp
->cl_openowners
)) {
1052 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1053 release_openowner(oo
);
1055 nfsd4_shutdown_callback(clp
);
1056 if (clp
->cl_cb_conn
.cb_xprt
)
1057 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1058 list_del(&clp
->cl_idhash
);
1059 list_del(&clp
->cl_strhash
);
1060 spin_lock(&client_lock
);
1061 unhash_client_locked(clp
);
1062 if (atomic_read(&clp
->cl_refcount
) == 0)
1064 spin_unlock(&client_lock
);
1067 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1069 memcpy(target
->cl_verifier
.data
, source
->data
,
1070 sizeof(target
->cl_verifier
.data
));
1073 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1075 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1076 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1079 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1081 target
->cr_uid
= source
->cr_uid
;
1082 target
->cr_gid
= source
->cr_gid
;
1083 target
->cr_group_info
= source
->cr_group_info
;
1084 get_group_info(target
->cr_group_info
);
1087 static int same_name(const char *n1
, const char *n2
)
1089 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1093 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1095 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1099 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1101 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1104 /* XXX what about NGROUP */
1106 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1108 return cr1
->cr_uid
== cr2
->cr_uid
;
1111 static void gen_clid(struct nfs4_client
*clp
)
1113 static u32 current_clientid
= 1;
1115 clp
->cl_clientid
.cl_boot
= boot_time
;
1116 clp
->cl_clientid
.cl_id
= current_clientid
++;
1119 static void gen_confirm(struct nfs4_client
*clp
)
1124 p
= (u32
*)clp
->cl_confirm
.data
;
1125 *p
++ = get_seconds();
1129 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1131 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1134 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1136 struct nfs4_stid
*s
;
1138 s
= find_stateid(cl
, t
);
1141 if (typemask
& s
->sc_type
)
1146 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1147 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1149 struct nfs4_client
*clp
;
1150 struct sockaddr
*sa
= svc_addr(rqstp
);
1153 clp
= alloc_client(name
);
1157 INIT_LIST_HEAD(&clp
->cl_sessions
);
1159 princ
= svc_gss_principal(rqstp
);
1161 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1162 if (clp
->cl_principal
== NULL
) {
1168 idr_init(&clp
->cl_stateids
);
1169 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1170 atomic_set(&clp
->cl_refcount
, 0);
1171 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1172 INIT_LIST_HEAD(&clp
->cl_idhash
);
1173 INIT_LIST_HEAD(&clp
->cl_strhash
);
1174 INIT_LIST_HEAD(&clp
->cl_openowners
);
1175 INIT_LIST_HEAD(&clp
->cl_delegations
);
1176 INIT_LIST_HEAD(&clp
->cl_lru
);
1177 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1178 spin_lock_init(&clp
->cl_lock
);
1179 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1180 clp
->cl_time
= get_seconds();
1181 clear_bit(0, &clp
->cl_cb_slot_busy
);
1182 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1183 copy_verf(clp
, verf
);
1184 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1185 clp
->cl_flavor
= rqstp
->rq_flavor
;
1186 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1188 clp
->cl_cb_session
= NULL
;
1193 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1195 unsigned int idhashval
;
1197 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1198 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1199 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1204 move_to_confirmed(struct nfs4_client
*clp
)
1206 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1207 unsigned int strhashval
;
1209 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1210 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1211 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1212 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1216 static struct nfs4_client
*
1217 find_confirmed_client(clientid_t
*clid
)
1219 struct nfs4_client
*clp
;
1220 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1222 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1223 if (same_clid(&clp
->cl_clientid
, clid
))
1229 static struct nfs4_client
*
1230 find_unconfirmed_client(clientid_t
*clid
)
1232 struct nfs4_client
*clp
;
1233 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1235 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1236 if (same_clid(&clp
->cl_clientid
, clid
))
1242 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1244 return clp
->cl_exchange_flags
!= 0;
1247 static struct nfs4_client
*
1248 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1250 struct nfs4_client
*clp
;
1252 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1253 if (same_name(clp
->cl_recdir
, dname
))
1259 static struct nfs4_client
*
1260 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1262 struct nfs4_client
*clp
;
1264 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1265 if (same_name(clp
->cl_recdir
, dname
))
1272 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1274 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1275 struct sockaddr
*sa
= svc_addr(rqstp
);
1276 u32 scopeid
= rpc_get_scope_id(sa
);
1277 unsigned short expected_family
;
1279 /* Currently, we only support tcp and tcp6 for the callback channel */
1280 if (se
->se_callback_netid_len
== 3 &&
1281 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1282 expected_family
= AF_INET
;
1283 else if (se
->se_callback_netid_len
== 4 &&
1284 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1285 expected_family
= AF_INET6
;
1289 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1290 se
->se_callback_addr_len
,
1291 (struct sockaddr
*)&conn
->cb_addr
,
1292 sizeof(conn
->cb_addr
));
1294 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1297 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1298 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1300 conn
->cb_prog
= se
->se_callback_prog
;
1301 conn
->cb_ident
= se
->se_callback_ident
;
1302 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1305 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1306 conn
->cb_addrlen
= 0;
1307 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1308 "will not receive delegations\n",
1309 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1315 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1318 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1320 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1323 dprintk("--> %s slot %p\n", __func__
, slot
);
1325 slot
->sl_opcnt
= resp
->opcnt
;
1326 slot
->sl_status
= resp
->cstate
.status
;
1328 if (nfsd4_not_cached(resp
)) {
1329 slot
->sl_datalen
= 0;
1332 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1333 base
= (char *)resp
->cstate
.datap
-
1334 (char *)resp
->xbuf
->head
[0].iov_base
;
1335 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1337 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1342 * Encode the replay sequence operation from the slot values.
1343 * If cachethis is FALSE encode the uncached rep error on the next
1344 * operation which sets resp->p and increments resp->opcnt for
1345 * nfs4svc_encode_compoundres.
1349 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1350 struct nfsd4_compoundres
*resp
)
1352 struct nfsd4_op
*op
;
1353 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1355 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1356 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1358 /* Encode the replayed sequence operation */
1359 op
= &args
->ops
[resp
->opcnt
- 1];
1360 nfsd4_encode_operation(resp
, op
);
1362 /* Return nfserr_retry_uncached_rep in next operation. */
1363 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1364 op
= &args
->ops
[resp
->opcnt
++];
1365 op
->status
= nfserr_retry_uncached_rep
;
1366 nfsd4_encode_operation(resp
, op
);
1372 * The sequence operation is not cached because we can use the slot and
1376 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1377 struct nfsd4_sequence
*seq
)
1379 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1382 dprintk("--> %s slot %p\n", __func__
, slot
);
1384 /* Either returns 0 or nfserr_retry_uncached */
1385 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1386 if (status
== nfserr_retry_uncached_rep
)
1389 /* The sequence operation has been encoded, cstate->datap set. */
1390 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1392 resp
->opcnt
= slot
->sl_opcnt
;
1393 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1394 status
= slot
->sl_status
;
1400 * Set the exchange_id flags returned by the server.
1403 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1405 /* pNFS is not supported */
1406 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1408 /* Referrals are supported, Migration is not. */
1409 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1411 /* set the wire flags to return to client. */
1412 clid
->flags
= new->cl_exchange_flags
;
1416 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1417 struct nfsd4_compound_state
*cstate
,
1418 struct nfsd4_exchange_id
*exid
)
1420 struct nfs4_client
*unconf
, *conf
, *new;
1422 unsigned int strhashval
;
1423 char dname
[HEXDIR_LEN
];
1424 char addr_str
[INET6_ADDRSTRLEN
];
1425 nfs4_verifier verf
= exid
->verifier
;
1426 struct sockaddr
*sa
= svc_addr(rqstp
);
1428 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1429 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1430 "ip_addr=%s flags %x, spa_how %d\n",
1431 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1432 addr_str
, exid
->flags
, exid
->spa_how
);
1434 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1435 return nfserr_inval
;
1437 /* Currently only support SP4_NONE */
1438 switch (exid
->spa_how
) {
1442 return nfserr_serverfault
;
1444 BUG(); /* checked by xdr code */
1446 return nfserr_serverfault
; /* no excuse :-/ */
1449 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1454 strhashval
= clientstr_hashval(dname
);
1459 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1461 if (!clp_used_exchangeid(conf
)) {
1462 status
= nfserr_clid_inuse
; /* XXX: ? */
1465 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1466 /* 18.35.4 case 8 */
1467 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1468 status
= nfserr_not_same
;
1471 /* Client reboot: destroy old state */
1472 expire_client(conf
);
1475 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1476 /* 18.35.4 case 9 */
1477 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1478 status
= nfserr_perm
;
1481 expire_client(conf
);
1485 * Set bit when the owner id and verifier map to an already
1486 * confirmed client id (18.35.3).
1488 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1491 * Falling into 18.35.4 case 2, possible router replay.
1492 * Leave confirmed record intact and return same result.
1494 copy_verf(conf
, &verf
);
1499 /* 18.35.4 case 7 */
1500 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1501 status
= nfserr_noent
;
1505 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1508 * Possible retry or client restart. Per 18.35.4 case 4,
1509 * a new unconfirmed record should be generated regardless
1510 * of whether any properties have changed.
1512 expire_client(unconf
);
1517 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1519 status
= nfserr_jukebox
;
1524 add_to_unconfirmed(new, strhashval
);
1526 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1527 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1530 nfsd4_set_ex_flags(new, exid
);
1532 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1533 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1537 nfs4_unlock_state();
1539 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1544 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1546 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1549 /* The slot is in use, and no response has been sent. */
1551 if (seqid
== slot_seqid
)
1552 return nfserr_jukebox
;
1554 return nfserr_seq_misordered
;
1557 if (likely(seqid
== slot_seqid
+ 1))
1560 if (seqid
== slot_seqid
)
1561 return nfserr_replay_cache
;
1563 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1565 /* Misordered replay or misordered new request */
1566 return nfserr_seq_misordered
;
1570 * Cache the create session result into the create session single DRC
1571 * slot cache by saving the xdr structure. sl_seqid has been set.
1572 * Do this for solo or embedded create session operations.
1575 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1576 struct nfsd4_clid_slot
*slot
, int nfserr
)
1578 slot
->sl_status
= nfserr
;
1579 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1583 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1584 struct nfsd4_clid_slot
*slot
)
1586 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1587 return slot
->sl_status
;
1590 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1591 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1592 1 + /* MIN tag is length with zero, only length */ \
1593 3 + /* version, opcount, opcode */ \
1594 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1595 /* seqid, slotID, slotID, cache */ \
1596 4 ) * sizeof(__be32))
1598 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1599 2 + /* verifier: AUTH_NULL, length 0 */\
1601 1 + /* MIN tag is length with zero, only length */ \
1602 3 + /* opcount, opcode, opstatus*/ \
1603 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1604 /* seqid, slotID, slotID, slotID, status */ \
1605 5 ) * sizeof(__be32))
1607 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1609 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1610 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1614 nfsd4_create_session(struct svc_rqst
*rqstp
,
1615 struct nfsd4_compound_state
*cstate
,
1616 struct nfsd4_create_session
*cr_ses
)
1618 struct sockaddr
*sa
= svc_addr(rqstp
);
1619 struct nfs4_client
*conf
, *unconf
;
1620 struct nfsd4_session
*new;
1621 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1622 bool confirm_me
= false;
1625 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1626 return nfserr_inval
;
1629 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1630 conf
= find_confirmed_client(&cr_ses
->clientid
);
1633 cs_slot
= &conf
->cl_cs_slot
;
1634 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1635 if (status
== nfserr_replay_cache
) {
1636 dprintk("Got a create_session replay! seqid= %d\n",
1638 /* Return the cached reply status */
1639 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1641 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1642 status
= nfserr_seq_misordered
;
1643 dprintk("Sequence misordered!\n");
1644 dprintk("Expected seqid= %d but got seqid= %d\n",
1645 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1648 } else if (unconf
) {
1649 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1650 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1651 status
= nfserr_clid_inuse
;
1655 cs_slot
= &unconf
->cl_cs_slot
;
1656 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1658 /* an unconfirmed replay returns misordered */
1659 status
= nfserr_seq_misordered
;
1666 status
= nfserr_stale_clientid
;
1671 * XXX: we should probably set this at creation time, and check
1672 * for consistent minorversion use throughout:
1674 conf
->cl_minorversion
= 1;
1676 * We do not support RDMA or persistent sessions
1678 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1679 cr_ses
->flags
&= ~SESSION4_RDMA
;
1681 status
= nfserr_toosmall
;
1682 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1685 status
= nfserr_jukebox
;
1686 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1690 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1691 NFS4_MAX_SESSIONID_LEN
);
1692 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1693 sizeof(struct nfsd4_channel_attrs
));
1694 cs_slot
->sl_seqid
++;
1695 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1697 /* cache solo and embedded create sessions under the state lock */
1698 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1700 move_to_confirmed(conf
);
1702 nfs4_unlock_state();
1703 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1707 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1709 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1710 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1712 return argp
->opcnt
== resp
->opcnt
;
1715 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1718 case NFS4_CDFC4_FORE
:
1719 case NFS4_CDFC4_BACK
:
1721 case NFS4_CDFC4_FORE_OR_BOTH
:
1722 case NFS4_CDFC4_BACK_OR_BOTH
:
1723 *dir
= NFS4_CDFC4_BOTH
;
1726 return nfserr_inval
;
1729 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1730 struct nfsd4_compound_state
*cstate
,
1731 struct nfsd4_bind_conn_to_session
*bcts
)
1735 if (!nfsd4_last_compound_op(rqstp
))
1736 return nfserr_not_only_op
;
1737 spin_lock(&client_lock
);
1738 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1739 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1740 * client_lock iself: */
1741 if (cstate
->session
) {
1742 nfsd4_get_session(cstate
->session
);
1743 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1745 spin_unlock(&client_lock
);
1746 if (!cstate
->session
)
1747 return nfserr_badsession
;
1749 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1751 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1755 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1759 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1763 nfsd4_destroy_session(struct svc_rqst
*r
,
1764 struct nfsd4_compound_state
*cstate
,
1765 struct nfsd4_destroy_session
*sessionid
)
1767 struct nfsd4_session
*ses
;
1768 u32 status
= nfserr_badsession
;
1771 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1772 * - Should we return nfserr_back_chan_busy if waiting for
1773 * callbacks on to-be-destroyed session?
1774 * - Do we need to clear any callback info from previous session?
1777 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1778 if (!nfsd4_last_compound_op(r
))
1779 return nfserr_not_only_op
;
1781 dump_sessionid(__func__
, &sessionid
->sessionid
);
1782 spin_lock(&client_lock
);
1783 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1785 spin_unlock(&client_lock
);
1789 unhash_session(ses
);
1790 spin_unlock(&client_lock
);
1793 nfsd4_probe_callback_sync(ses
->se_client
);
1794 nfs4_unlock_state();
1796 nfsd4_del_conns(ses
);
1798 nfsd4_put_session(ses
);
1801 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1805 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1807 struct nfsd4_conn
*c
;
1809 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1810 if (c
->cn_xprt
== xpt
) {
1817 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1819 struct nfs4_client
*clp
= ses
->se_client
;
1820 struct nfsd4_conn
*c
;
1823 spin_lock(&clp
->cl_lock
);
1824 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1826 spin_unlock(&clp
->cl_lock
);
1830 __nfsd4_hash_conn(new, ses
);
1831 spin_unlock(&clp
->cl_lock
);
1832 ret
= nfsd4_register_conn(new);
1834 /* oops; xprt is already down: */
1835 nfsd4_conn_lost(&new->cn_xpt_user
);
1839 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1841 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1843 return args
->opcnt
> session
->se_fchannel
.maxops
;
1846 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1847 struct nfsd4_session
*session
)
1849 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1851 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1855 nfsd4_sequence(struct svc_rqst
*rqstp
,
1856 struct nfsd4_compound_state
*cstate
,
1857 struct nfsd4_sequence
*seq
)
1859 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1860 struct nfsd4_session
*session
;
1861 struct nfsd4_slot
*slot
;
1862 struct nfsd4_conn
*conn
;
1865 if (resp
->opcnt
!= 1)
1866 return nfserr_sequence_pos
;
1869 * Will be either used or freed by nfsd4_sequence_check_conn
1872 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1874 return nfserr_jukebox
;
1876 spin_lock(&client_lock
);
1877 status
= nfserr_badsession
;
1878 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1882 status
= nfserr_too_many_ops
;
1883 if (nfsd4_session_too_many_ops(rqstp
, session
))
1886 status
= nfserr_req_too_big
;
1887 if (nfsd4_request_too_big(rqstp
, session
))
1890 status
= nfserr_badslot
;
1891 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1894 slot
= session
->se_slots
[seq
->slotid
];
1895 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1897 /* We do not negotiate the number of slots yet, so set the
1898 * maxslots to the session maxreqs which is used to encode
1899 * sr_highest_slotid and the sr_target_slot id to maxslots */
1900 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1902 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1903 if (status
== nfserr_replay_cache
) {
1904 cstate
->slot
= slot
;
1905 cstate
->session
= session
;
1906 /* Return the cached reply status and set cstate->status
1907 * for nfsd4_proc_compound processing */
1908 status
= nfsd4_replay_cache_entry(resp
, seq
);
1909 cstate
->status
= nfserr_replay_cache
;
1915 nfsd4_sequence_check_conn(conn
, session
);
1918 /* Success! bump slot seqid */
1919 slot
->sl_inuse
= true;
1920 slot
->sl_seqid
= seq
->seqid
;
1921 slot
->sl_cachethis
= seq
->cachethis
;
1923 cstate
->slot
= slot
;
1924 cstate
->session
= session
;
1927 /* Hold a session reference until done processing the compound. */
1928 if (cstate
->session
) {
1929 struct nfs4_client
*clp
= session
->se_client
;
1931 nfsd4_get_session(cstate
->session
);
1932 atomic_inc(&clp
->cl_refcount
);
1933 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1934 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1937 spin_unlock(&client_lock
);
1938 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1943 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1947 if (rc
->rca_one_fs
) {
1948 if (!cstate
->current_fh
.fh_dentry
)
1949 return nfserr_nofilehandle
;
1951 * We don't take advantage of the rca_one_fs case.
1952 * That's OK, it's optional, we can safely ignore it.
1958 status
= nfserr_complete_already
;
1959 if (cstate
->session
->se_client
->cl_firststate
)
1962 status
= nfserr_stale_clientid
;
1963 if (is_client_expired(cstate
->session
->se_client
))
1965 * The following error isn't really legal.
1966 * But we only get here if the client just explicitly
1967 * destroyed the client. Surely it no longer cares what
1968 * error it gets back on an operation for the dead
1974 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1976 nfs4_unlock_state();
1981 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1982 struct nfsd4_setclientid
*setclid
)
1984 struct xdr_netobj clname
= setclid
->se_name
;
1985 nfs4_verifier clverifier
= setclid
->se_verf
;
1986 unsigned int strhashval
;
1987 struct nfs4_client
*conf
, *unconf
, *new;
1989 char dname
[HEXDIR_LEN
];
1991 status
= nfs4_make_rec_clidname(dname
, &clname
);
1996 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1997 * We get here on a DRC miss.
2000 strhashval
= clientstr_hashval(dname
);
2003 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2005 /* RFC 3530 14.2.33 CASE 0: */
2006 status
= nfserr_clid_inuse
;
2007 if (clp_used_exchangeid(conf
))
2009 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2010 char addr_str
[INET6_ADDRSTRLEN
];
2011 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2013 dprintk("NFSD: setclientid: string in use by client "
2014 "at %s\n", addr_str
);
2019 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2020 * has a description of SETCLIENTID request processing consisting
2021 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2023 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2024 status
= nfserr_jukebox
;
2027 * RFC 3530 14.2.33 CASE 4:
2028 * placed first, because it is the normal case
2031 expire_client(unconf
);
2032 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2036 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2038 * RFC 3530 14.2.33 CASE 1:
2039 * probable callback update
2042 /* Note this is removing unconfirmed {*x***},
2043 * which is stronger than RFC recommended {vxc**}.
2044 * This has the advantage that there is at most
2045 * one {*x***} in either list at any time.
2047 expire_client(unconf
);
2049 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2052 copy_clid(new, conf
);
2053 } else if (!unconf
) {
2055 * RFC 3530 14.2.33 CASE 2:
2056 * probable client reboot; state will be removed if
2059 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2065 * RFC 3530 14.2.33 CASE 3:
2066 * probable client reboot; state will be removed if
2069 expire_client(unconf
);
2070 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2076 * XXX: we should probably set this at creation time, and check
2077 * for consistent minorversion use throughout:
2079 new->cl_minorversion
= 0;
2080 gen_callback(new, setclid
, rqstp
);
2081 add_to_unconfirmed(new, strhashval
);
2082 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2083 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2084 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2087 nfs4_unlock_state();
2093 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2094 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2095 * bullets, labeled as CASE1 - CASE4 below.
2098 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2099 struct nfsd4_compound_state
*cstate
,
2100 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2102 struct sockaddr
*sa
= svc_addr(rqstp
);
2103 struct nfs4_client
*conf
, *unconf
;
2104 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2105 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2108 if (STALE_CLIENTID(clid
))
2109 return nfserr_stale_clientid
;
2111 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2112 * We get here on a DRC miss.
2117 conf
= find_confirmed_client(clid
);
2118 unconf
= find_unconfirmed_client(clid
);
2120 status
= nfserr_clid_inuse
;
2121 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2123 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2127 * section 14.2.34 of RFC 3530 has a description of
2128 * SETCLIENTID_CONFIRM request processing consisting
2129 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2131 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2133 * RFC 3530 14.2.34 CASE 1:
2136 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2137 status
= nfserr_clid_inuse
;
2139 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2140 nfsd4_probe_callback(conf
);
2141 expire_client(unconf
);
2145 } else if (conf
&& !unconf
) {
2147 * RFC 3530 14.2.34 CASE 2:
2148 * probable retransmitted request; play it safe and
2151 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2152 status
= nfserr_clid_inuse
;
2155 } else if (!conf
&& unconf
2156 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2158 * RFC 3530 14.2.34 CASE 3:
2159 * Normal case; new or rebooted client:
2161 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2162 status
= nfserr_clid_inuse
;
2165 clientstr_hashval(unconf
->cl_recdir
);
2166 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2169 nfsd4_remove_clid_dir(conf
);
2170 expire_client(conf
);
2172 move_to_confirmed(unconf
);
2174 nfsd4_probe_callback(conf
);
2177 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2178 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2181 * RFC 3530 14.2.34 CASE 4:
2182 * Client probably hasn't noticed that we rebooted yet.
2184 status
= nfserr_stale_clientid
;
2186 /* check that we have hit one of the cases...*/
2187 status
= nfserr_clid_inuse
;
2190 nfs4_unlock_state();
2194 /* OPEN Share state helper functions */
2195 static inline struct nfs4_file
*
2196 alloc_init_file(struct inode
*ino
)
2198 struct nfs4_file
*fp
;
2199 unsigned int hashval
= file_hashval(ino
);
2201 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2203 atomic_set(&fp
->fi_ref
, 1);
2204 INIT_LIST_HEAD(&fp
->fi_hash
);
2205 INIT_LIST_HEAD(&fp
->fi_stateids
);
2206 INIT_LIST_HEAD(&fp
->fi_delegations
);
2207 fp
->fi_inode
= igrab(ino
);
2208 fp
->fi_had_conflict
= false;
2209 fp
->fi_lease
= NULL
;
2210 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2211 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2212 spin_lock(&recall_lock
);
2213 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2214 spin_unlock(&recall_lock
);
2221 nfsd4_free_slab(struct kmem_cache
**slab
)
2225 kmem_cache_destroy(*slab
);
2230 nfsd4_free_slabs(void)
2232 nfsd4_free_slab(&openowner_slab
);
2233 nfsd4_free_slab(&lockowner_slab
);
2234 nfsd4_free_slab(&file_slab
);
2235 nfsd4_free_slab(&stateid_slab
);
2236 nfsd4_free_slab(&deleg_slab
);
2240 nfsd4_init_slabs(void)
2242 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2243 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2244 if (openowner_slab
== NULL
)
2246 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2247 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2248 if (lockowner_slab
== NULL
)
2250 file_slab
= kmem_cache_create("nfsd4_files",
2251 sizeof(struct nfs4_file
), 0, 0, NULL
);
2252 if (file_slab
== NULL
)
2254 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2255 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2256 if (stateid_slab
== NULL
)
2258 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2259 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2260 if (deleg_slab
== NULL
)
2265 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2269 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2271 kfree(oo
->oo_owner
.so_owner
.data
);
2272 kmem_cache_free(openowner_slab
, oo
);
2275 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2277 kfree(lo
->lo_owner
.so_owner
.data
);
2278 kmem_cache_free(lockowner_slab
, lo
);
2281 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2283 rp
->rp_status
= nfserr_serverfault
;
2285 rp
->rp_buf
= rp
->rp_ibuf
;
2288 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2290 struct nfs4_stateowner
*sop
;
2292 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2296 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2297 if (!sop
->so_owner
.data
) {
2298 kmem_cache_free(slab
, sop
);
2301 sop
->so_owner
.len
= owner
->len
;
2303 INIT_LIST_HEAD(&sop
->so_stateids
);
2304 sop
->so_client
= clp
;
2305 init_nfs4_replay(&sop
->so_replay
);
2309 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2311 list_add(&oo
->oo_owner
.so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2312 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2315 static struct nfs4_openowner
*
2316 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2317 struct nfs4_openowner
*oo
;
2319 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2322 oo
->oo_owner
.so_is_open_owner
= 1;
2323 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2326 oo
->oo_last_closed_stid
= NULL
;
2327 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2328 hash_openowner(oo
, clp
, strhashval
);
2332 static inline __be32
init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2333 struct nfs4_openowner
*oo
= open
->op_openowner
;
2334 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2337 status
= init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2340 INIT_LIST_HEAD(&stp
->st_lockowners
);
2341 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2342 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2343 stp
->st_stateowner
= &oo
->oo_owner
;
2346 stp
->st_access_bmap
= 0;
2347 stp
->st_deny_bmap
= 0;
2348 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2349 &stp
->st_access_bmap
);
2350 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2351 stp
->st_openstp
= NULL
;
2356 move_to_close_lru(struct nfs4_openowner
*oo
)
2358 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2360 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2361 oo
->oo_time
= get_seconds();
2365 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2368 return (sop
->so_owner
.len
== owner
->len
) &&
2369 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2370 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2373 static struct nfs4_openowner
*
2374 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2376 struct nfs4_stateowner
*so
= NULL
;
2378 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2379 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2380 return container_of(so
, struct nfs4_openowner
, oo_owner
);
2385 /* search file_hashtbl[] for file */
2386 static struct nfs4_file
*
2387 find_file(struct inode
*ino
)
2389 unsigned int hashval
= file_hashval(ino
);
2390 struct nfs4_file
*fp
;
2392 spin_lock(&recall_lock
);
2393 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2394 if (fp
->fi_inode
== ino
) {
2396 spin_unlock(&recall_lock
);
2400 spin_unlock(&recall_lock
);
2405 * Called to check deny when READ with all zero stateid or
2406 * WRITE with all zero or all one stateid
2409 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2411 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2412 struct nfs4_file
*fp
;
2413 struct nfs4_ol_stateid
*stp
;
2416 dprintk("NFSD: nfs4_share_conflict\n");
2418 fp
= find_file(ino
);
2421 ret
= nfserr_locked
;
2422 /* Search for conflicting share reservations */
2423 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2424 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2425 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2434 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2436 /* We're assuming the state code never drops its reference
2437 * without first removing the lease. Since we're in this lease
2438 * callback (and since the lease code is serialized by the kernel
2439 * lock) we know the server hasn't removed the lease yet, we know
2440 * it's safe to take a reference: */
2441 atomic_inc(&dp
->dl_count
);
2443 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2445 /* only place dl_time is set. protected by lock_flocks*/
2446 dp
->dl_time
= get_seconds();
2448 nfsd4_cb_recall(dp
);
2451 /* Called from break_lease() with lock_flocks() held. */
2452 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2454 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2455 struct nfs4_delegation
*dp
;
2458 /* We assume break_lease is only called once per lease: */
2459 BUG_ON(fp
->fi_had_conflict
);
2461 * We don't want the locks code to timeout the lease for us;
2462 * we'll remove it ourself if a delegation isn't returned
2465 fl
->fl_break_time
= 0;
2467 spin_lock(&recall_lock
);
2468 fp
->fi_had_conflict
= true;
2469 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2470 nfsd_break_one_deleg(dp
);
2471 spin_unlock(&recall_lock
);
2475 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2478 return lease_modify(onlist
, arg
);
2483 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2484 .lm_break
= nfsd_break_deleg_cb
,
2485 .lm_change
= nfsd_change_deleg_cb
,
2488 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2490 if (nfsd4_has_session(cstate
))
2492 if (seqid
== so
->so_seqid
- 1)
2493 return nfserr_replay_me
;
2494 if (seqid
== so
->so_seqid
)
2496 return nfserr_bad_seqid
;
2500 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2501 struct nfsd4_open
*open
)
2503 clientid_t
*clientid
= &open
->op_clientid
;
2504 struct nfs4_client
*clp
= NULL
;
2505 unsigned int strhashval
;
2506 struct nfs4_openowner
*oo
= NULL
;
2509 if (STALE_CLIENTID(&open
->op_clientid
))
2510 return nfserr_stale_clientid
;
2512 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2513 oo
= find_openstateowner_str(strhashval
, open
);
2514 open
->op_openowner
= oo
;
2516 /* Make sure the client's lease hasn't expired. */
2517 clp
= find_confirmed_client(clientid
);
2519 return nfserr_expired
;
2522 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2523 /* Replace unconfirmed owners without checking for replay. */
2524 clp
= oo
->oo_owner
.so_client
;
2525 release_openowner(oo
);
2526 open
->op_openowner
= NULL
;
2529 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2533 if (open
->op_openowner
== NULL
) {
2534 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2536 return nfserr_jukebox
;
2537 open
->op_openowner
= oo
;
2539 list_del_init(&oo
->oo_close_lru
);
2540 renew_client(oo
->oo_owner
.so_client
);
2544 static inline __be32
2545 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2547 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2548 return nfserr_openmode
;
2553 static int share_access_to_flags(u32 share_access
)
2555 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2557 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2560 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2562 struct nfs4_stid
*ret
;
2564 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2567 return delegstateid(ret
);
2571 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2572 struct nfs4_delegation
**dp
)
2575 __be32 status
= nfserr_bad_stateid
;
2577 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2580 flags
= share_access_to_flags(open
->op_share_access
);
2581 status
= nfs4_check_delegmode(*dp
, flags
);
2585 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2589 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2594 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2596 struct nfs4_ol_stateid
*local
;
2597 struct nfs4_openowner
*oo
= open
->op_openowner
;
2599 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2600 /* ignore lock owners */
2601 if (local
->st_stateowner
->so_is_open_owner
== 0)
2603 /* remember if we have seen this open owner */
2604 if (local
->st_stateowner
== &oo
->oo_owner
)
2606 /* check for conflicting share reservations */
2607 if (!test_share(local
, open
))
2608 return nfserr_share_denied
;
2613 static inline struct nfs4_ol_stateid
*
2614 nfs4_alloc_stateid(void)
2616 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2619 static inline int nfs4_access_to_access(u32 nfs4_access
)
2623 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2624 flags
|= NFSD_MAY_READ
;
2625 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2626 flags
|= NFSD_MAY_WRITE
;
2630 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2631 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2634 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2635 int access
= nfs4_access_to_access(open
->op_share_access
);
2637 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2638 * allowing it to break the lease and return EAGAIN leaves the
2639 * client unable to make progress in returning the delegation */
2640 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2641 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2643 if (!fp
->fi_fds
[oflag
]) {
2644 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2645 &fp
->fi_fds
[oflag
]);
2649 nfs4_file_get_access(fp
, oflag
);
2655 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_ol_stateid
**stpp
,
2656 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2657 struct nfsd4_open
*open
)
2659 struct nfs4_ol_stateid
*stp
;
2662 stp
= nfs4_alloc_stateid();
2664 return nfserr_jukebox
;
2666 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2668 kmem_cache_free(stateid_slab
, stp
);
2675 static inline __be32
2676 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2677 struct nfsd4_open
*open
)
2679 struct iattr iattr
= {
2680 .ia_valid
= ATTR_SIZE
,
2683 if (!open
->op_truncate
)
2685 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2686 return nfserr_inval
;
2687 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2691 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
2693 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2697 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2699 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2703 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2706 int oflag
= nfs4_access_to_omode(op_share_access
);
2707 nfs4_file_put_access(fp
, oflag
);
2711 /* remember the open */
2712 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2713 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2720 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2722 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2723 open
->op_openowner
->oo_owner
.so_client
->cl_firststate
= 1;
2726 /* Should we give out recallable state?: */
2727 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2729 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2732 * In the sessions case, since we don't have to establish a
2733 * separate connection for callbacks, we assume it's OK
2734 * until we hear otherwise:
2736 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2739 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2741 struct file_lock
*fl
;
2743 fl
= locks_alloc_lock();
2746 locks_init_lock(fl
);
2747 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2748 fl
->fl_flags
= FL_LEASE
;
2749 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2750 fl
->fl_end
= OFFSET_MAX
;
2751 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2752 fl
->fl_pid
= current
->tgid
;
2756 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2758 struct nfs4_file
*fp
= dp
->dl_file
;
2759 struct file_lock
*fl
;
2762 fl
= nfs4_alloc_init_lease(dp
, flag
);
2765 fl
->fl_file
= find_readable_file(fp
);
2766 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2767 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2769 list_del_init(&dp
->dl_perclnt
);
2770 locks_free_lock(fl
);
2774 fp
->fi_deleg_file
= fl
->fl_file
;
2775 get_file(fp
->fi_deleg_file
);
2776 atomic_set(&fp
->fi_delegees
, 1);
2777 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2781 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2783 struct nfs4_file
*fp
= dp
->dl_file
;
2786 return nfs4_setlease(dp
, flag
);
2787 spin_lock(&recall_lock
);
2788 if (fp
->fi_had_conflict
) {
2789 spin_unlock(&recall_lock
);
2792 atomic_inc(&fp
->fi_delegees
);
2793 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2794 spin_unlock(&recall_lock
);
2795 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2800 * Attempt to hand out a delegation.
2803 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2805 struct nfs4_delegation
*dp
;
2806 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2808 int status
, flag
= 0;
2810 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2811 flag
= NFS4_OPEN_DELEGATE_NONE
;
2812 open
->op_recall
= 0;
2813 switch (open
->op_claim_type
) {
2814 case NFS4_OPEN_CLAIM_PREVIOUS
:
2816 open
->op_recall
= 1;
2817 flag
= open
->op_delegate_type
;
2818 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2821 case NFS4_OPEN_CLAIM_NULL
:
2822 /* Let's not give out any delegations till everyone's
2823 * had the chance to reclaim theirs.... */
2824 if (locks_in_grace())
2826 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2828 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2829 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2831 flag
= NFS4_OPEN_DELEGATE_READ
;
2837 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2840 status
= nfs4_set_delegation(dp
, flag
);
2844 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2846 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2847 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2849 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2850 && flag
== NFS4_OPEN_DELEGATE_NONE
2851 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2852 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2853 open
->op_delegate_type
= flag
;
2856 nfs4_put_delegation(dp
);
2858 flag
= NFS4_OPEN_DELEGATE_NONE
;
2863 * called with nfs4_lock_state() held.
2866 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2868 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2869 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
2870 struct nfs4_file
*fp
= NULL
;
2871 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2872 struct nfs4_ol_stateid
*stp
= NULL
;
2873 struct nfs4_delegation
*dp
= NULL
;
2877 * Lookup file; if found, lookup stateid and check open request,
2878 * and check for delegations in the process of being recalled.
2879 * If not found, create the nfs4_file struct
2881 fp
= find_file(ino
);
2883 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2885 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
2889 status
= nfserr_bad_stateid
;
2890 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2892 status
= nfserr_jukebox
;
2893 fp
= alloc_init_file(ino
);
2899 * OPEN the file, or upgrade an existing OPEN.
2900 * If truncate fails, the OPEN fails.
2903 /* Stateid was found, this is an OPEN upgrade */
2904 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2908 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2911 status
= init_open_stateid(stp
, fp
, open
);
2913 release_open_stateid(stp
);
2916 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2918 release_open_stateid(stp
);
2922 update_stateid(&stp
->st_stid
.sc_stateid
);
2923 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
2925 if (nfsd4_has_session(&resp
->cstate
))
2926 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2929 * Attempt to hand out a delegation. No error return, because the
2930 * OPEN succeeds even if we fail.
2932 nfs4_open_delegation(current_fh
, open
, stp
);
2936 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2937 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
2941 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2942 nfs4_set_claim_prev(open
);
2944 * To finish the open response, we just need to set the rflags.
2946 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2947 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
2948 !nfsd4_has_session(&resp
->cstate
))
2949 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2955 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2958 struct nfs4_client
*clp
;
2962 dprintk("process_renew(%08x/%08x): starting\n",
2963 clid
->cl_boot
, clid
->cl_id
);
2964 status
= nfserr_stale_clientid
;
2965 if (STALE_CLIENTID(clid
))
2967 clp
= find_confirmed_client(clid
);
2968 status
= nfserr_expired
;
2970 /* We assume the client took too long to RENEW. */
2971 dprintk("nfsd4_renew: clientid not found!\n");
2975 status
= nfserr_cb_path_down
;
2976 if (!list_empty(&clp
->cl_delegations
)
2977 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2981 nfs4_unlock_state();
2985 static struct lock_manager nfsd4_manager
= {
2989 nfsd4_end_grace(void)
2991 dprintk("NFSD: end of grace period\n");
2992 nfsd4_recdir_purge_old();
2993 locks_end_grace(&nfsd4_manager
);
2995 * Now that every NFSv4 client has had the chance to recover and
2996 * to see the (possibly new, possibly shorter) lease time, we
2997 * can safely set the next grace time to the current lease time:
2999 nfsd4_grace
= nfsd4_lease
;
3003 nfs4_laundromat(void)
3005 struct nfs4_client
*clp
;
3006 struct nfs4_openowner
*oo
;
3007 struct nfs4_delegation
*dp
;
3008 struct list_head
*pos
, *next
, reaplist
;
3009 time_t cutoff
= get_seconds() - nfsd4_lease
;
3010 time_t t
, clientid_val
= nfsd4_lease
;
3011 time_t u
, test_val
= nfsd4_lease
;
3015 dprintk("NFSD: laundromat service - starting\n");
3016 if (locks_in_grace())
3018 INIT_LIST_HEAD(&reaplist
);
3019 spin_lock(&client_lock
);
3020 list_for_each_safe(pos
, next
, &client_lru
) {
3021 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3022 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3023 t
= clp
->cl_time
- cutoff
;
3024 if (clientid_val
> t
)
3028 if (atomic_read(&clp
->cl_refcount
)) {
3029 dprintk("NFSD: client in use (clientid %08x)\n",
3030 clp
->cl_clientid
.cl_id
);
3033 unhash_client_locked(clp
);
3034 list_add(&clp
->cl_lru
, &reaplist
);
3036 spin_unlock(&client_lock
);
3037 list_for_each_safe(pos
, next
, &reaplist
) {
3038 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3039 dprintk("NFSD: purging unused client (clientid %08x)\n",
3040 clp
->cl_clientid
.cl_id
);
3041 nfsd4_remove_clid_dir(clp
);
3044 spin_lock(&recall_lock
);
3045 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3046 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3047 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3048 u
= dp
->dl_time
- cutoff
;
3053 list_move(&dp
->dl_recall_lru
, &reaplist
);
3055 spin_unlock(&recall_lock
);
3056 list_for_each_safe(pos
, next
, &reaplist
) {
3057 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3058 list_del_init(&dp
->dl_recall_lru
);
3059 unhash_delegation(dp
);
3061 test_val
= nfsd4_lease
;
3062 list_for_each_safe(pos
, next
, &close_lru
) {
3063 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3064 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3065 u
= oo
->oo_time
- cutoff
;
3070 release_openowner(oo
);
3072 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3073 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3074 nfs4_unlock_state();
3075 return clientid_val
;
3078 static struct workqueue_struct
*laundry_wq
;
3079 static void laundromat_main(struct work_struct
*);
3080 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3083 laundromat_main(struct work_struct
*not_used
)
3087 t
= nfs4_laundromat();
3088 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3089 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3092 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3094 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3095 return nfserr_bad_stateid
;
3100 STALE_STATEID(stateid_t
*stateid
)
3102 if (stateid
->si_opaque
.so_clid
.cl_boot
== boot_time
)
3104 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3105 STATEID_VAL(stateid
));
3110 access_permit_read(unsigned long access_bmap
)
3112 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3113 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3114 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3118 access_permit_write(unsigned long access_bmap
)
3120 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3121 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3125 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3127 __be32 status
= nfserr_openmode
;
3129 /* For lock stateid's, we test the parent open, not the lock: */
3130 if (stp
->st_openstp
)
3131 stp
= stp
->st_openstp
;
3132 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3134 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3141 static inline __be32
3142 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3144 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3146 else if (locks_in_grace()) {
3147 /* Answer in remaining cases depends on existence of
3148 * conflicting state; so we must wait out the grace period. */
3149 return nfserr_grace
;
3150 } else if (flags
& WR_STATE
)
3151 return nfs4_share_conflict(current_fh
,
3152 NFS4_SHARE_DENY_WRITE
);
3153 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3154 return nfs4_share_conflict(current_fh
,
3155 NFS4_SHARE_DENY_READ
);
3159 * Allow READ/WRITE during grace period on recovered state only for files
3160 * that are not able to provide mandatory locking.
3163 grace_disallows_io(struct inode
*inode
)
3165 return locks_in_grace() && mandatory_lock(inode
);
3168 /* Returns true iff a is later than b: */
3169 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3171 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3174 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3177 * When sessions are used the stateid generation number is ignored
3180 if (has_session
&& in
->si_generation
== 0)
3183 if (in
->si_generation
== ref
->si_generation
)
3186 /* If the client sends us a stateid from the future, it's buggy: */
3187 if (stateid_generation_after(in
, ref
))
3188 return nfserr_bad_stateid
;
3190 * However, we could see a stateid from the past, even from a
3191 * non-buggy client. For example, if the client sends a lock
3192 * while some IO is outstanding, the lock may bump si_generation
3193 * while the IO is still in flight. The client could avoid that
3194 * situation by waiting for responses on all the IO requests,
3195 * but better performance may result in retrying IO that
3196 * receives an old_stateid error if requests are rarely
3197 * reordered in flight:
3199 return nfserr_old_stateid
;
3202 __be32
nfs4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3204 struct nfs4_stid
*s
;
3205 struct nfs4_ol_stateid
*ols
;
3208 if (STALE_STATEID(stateid
))
3209 return nfserr_stale_stateid
;
3211 s
= find_stateid(cl
, stateid
);
3213 return nfserr_stale_stateid
;
3214 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3217 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3219 ols
= openlockstateid(s
);
3220 if (ols
->st_stateowner
->so_is_open_owner
3221 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3222 return nfserr_bad_stateid
;
3226 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
)
3228 struct nfs4_client
*cl
;
3230 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3231 return nfserr_bad_stateid
;
3232 if (STALE_STATEID(stateid
))
3233 return nfserr_stale_stateid
;
3234 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
);
3236 return nfserr_expired
;
3237 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3239 return nfserr_bad_stateid
;
3245 * Checks for stateid operations
3248 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3249 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3251 struct nfs4_stid
*s
;
3252 struct nfs4_ol_stateid
*stp
= NULL
;
3253 struct nfs4_delegation
*dp
= NULL
;
3254 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3255 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3261 if (grace_disallows_io(ino
))
3262 return nfserr_grace
;
3264 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3265 return check_special_stateids(current_fh
, stateid
, flags
);
3267 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
);
3270 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3273 switch (s
->sc_type
) {
3274 case NFS4_DELEG_STID
:
3275 dp
= delegstateid(s
);
3276 status
= nfs4_check_delegmode(dp
, flags
);
3279 renew_client(dp
->dl_stid
.sc_client
);
3281 *filpp
= dp
->dl_file
->fi_deleg_file
;
3285 case NFS4_OPEN_STID
:
3286 case NFS4_LOCK_STID
:
3287 stp
= openlockstateid(s
);
3288 status
= nfs4_check_fh(current_fh
, stp
);
3291 if (stp
->st_stateowner
->so_is_open_owner
3292 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3294 status
= nfs4_check_openmode(stp
, flags
);
3297 renew_client(stp
->st_stateowner
->so_client
);
3299 if (flags
& RD_STATE
)
3300 *filpp
= find_readable_file(stp
->st_file
);
3302 *filpp
= find_writeable_file(stp
->st_file
);
3306 return nfserr_bad_stateid
;
3314 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3316 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3317 return nfserr_locks_held
;
3318 release_lock_stateid(stp
);
3323 * Test if the stateid is valid
3326 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3327 struct nfsd4_test_stateid
*test_stateid
)
3329 /* real work is done during encoding */
3334 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3335 struct nfsd4_free_stateid
*free_stateid
)
3337 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3338 struct nfs4_stid
*s
;
3339 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3340 __be32 ret
= nfserr_bad_stateid
;
3343 s
= find_stateid(cl
, stateid
);
3346 switch (s
->sc_type
) {
3347 case NFS4_DELEG_STID
:
3348 ret
= nfserr_locks_held
;
3350 case NFS4_OPEN_STID
:
3351 case NFS4_LOCK_STID
:
3352 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3355 if (s
->sc_type
== NFS4_LOCK_STID
)
3356 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3358 ret
= nfserr_locks_held
;
3361 ret
= nfserr_bad_stateid
;
3364 nfs4_unlock_state();
3371 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3372 RD_STATE
: WR_STATE
;
3375 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3377 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3378 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3381 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3384 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3386 * "Closed" stateid's exist *only* to return
3387 * nfserr_replay_me from the previous step.
3389 return nfserr_bad_stateid
;
3390 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3393 return nfs4_check_fh(current_fh
, stp
);
3397 * Checks for sequence id mutating operations.
3400 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3401 stateid_t
*stateid
, char typemask
,
3402 struct nfs4_ol_stateid
**stpp
)
3405 struct nfs4_stid
*s
;
3407 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3408 seqid
, STATEID_VAL(stateid
));
3411 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
);
3414 *stpp
= openlockstateid(s
);
3415 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3416 renew_client((*stpp
)->st_stateowner
->so_client
);
3418 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3421 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3424 struct nfs4_openowner
*oo
;
3426 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3427 NFS4_OPEN_STID
, stpp
);
3430 oo
= openowner((*stpp
)->st_stateowner
);
3431 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3432 return nfserr_bad_stateid
;
3437 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3438 struct nfsd4_open_confirm
*oc
)
3441 struct nfs4_openowner
*oo
;
3442 struct nfs4_ol_stateid
*stp
;
3444 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3445 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3446 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3448 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3454 status
= nfs4_preprocess_seqid_op(cstate
,
3455 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3456 NFS4_OPEN_STID
, &stp
);
3459 oo
= openowner(stp
->st_stateowner
);
3460 status
= nfserr_bad_stateid
;
3461 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3463 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3464 update_stateid(&stp
->st_stid
.sc_stateid
);
3465 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3466 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3467 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3469 nfsd4_create_clid_dir(oo
->oo_owner
.so_client
);
3472 if (!cstate
->replay_owner
)
3473 nfs4_unlock_state();
3477 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3479 if (!test_bit(access
, &stp
->st_access_bmap
))
3481 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3482 __clear_bit(access
, &stp
->st_access_bmap
);
3485 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3487 switch (to_access
) {
3488 case NFS4_SHARE_ACCESS_READ
:
3489 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3490 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3492 case NFS4_SHARE_ACCESS_WRITE
:
3493 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3494 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3496 case NFS4_SHARE_ACCESS_BOTH
:
3504 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3507 for (i
= 0; i
< 4; i
++) {
3508 if ((i
& deny
) != i
)
3509 __clear_bit(i
, bmap
);
3514 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3515 struct nfsd4_compound_state
*cstate
,
3516 struct nfsd4_open_downgrade
*od
)
3519 struct nfs4_ol_stateid
*stp
;
3521 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3522 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3523 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3525 /* We don't yet support WANT bits: */
3526 od
->od_share_access
&= NFS4_SHARE_ACCESS_MASK
;
3529 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3530 &od
->od_stateid
, &stp
);
3533 status
= nfserr_inval
;
3534 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3535 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3536 stp
->st_access_bmap
, od
->od_share_access
);
3539 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3540 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3541 stp
->st_deny_bmap
, od
->od_share_deny
);
3544 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3546 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3548 update_stateid(&stp
->st_stid
.sc_stateid
);
3549 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3552 if (!cstate
->replay_owner
)
3553 nfs4_unlock_state();
3557 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3559 struct nfs4_openowner
*oo
;
3560 struct nfs4_ol_stateid
*s
;
3562 if (!so
->so_is_open_owner
)
3565 s
= oo
->oo_last_closed_stid
;
3568 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3569 /* Release the last_closed_stid on the next seqid bump: */
3570 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3573 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3574 release_last_closed_stateid(oo
);
3577 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3579 unhash_open_stateid(s
);
3580 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3584 * nfs4_unlock_state() called after encode
3587 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3588 struct nfsd4_close
*close
)
3591 struct nfs4_openowner
*oo
;
3592 struct nfs4_ol_stateid
*stp
;
3594 dprintk("NFSD: nfsd4_close on file %.*s\n",
3595 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3596 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3599 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3601 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3605 oo
= openowner(stp
->st_stateowner
);
3607 update_stateid(&stp
->st_stid
.sc_stateid
);
3608 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3610 nfsd4_close_open_stateid(stp
);
3611 oo
->oo_last_closed_stid
= stp
;
3613 /* place unused nfs4_stateowners on so_close_lru list to be
3614 * released by the laundromat service after the lease period
3615 * to enable us to handle CLOSE replay
3617 if (list_empty(&oo
->oo_owner
.so_stateids
))
3618 move_to_close_lru(oo
);
3620 if (!cstate
->replay_owner
)
3621 nfs4_unlock_state();
3626 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3627 struct nfsd4_delegreturn
*dr
)
3629 struct nfs4_delegation
*dp
;
3630 stateid_t
*stateid
= &dr
->dr_stateid
;
3631 struct nfs4_stid
*s
;
3632 struct inode
*inode
;
3635 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3637 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3640 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
);
3643 dp
= delegstateid(s
);
3644 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3647 renew_client(dp
->dl_stid
.sc_client
);
3649 unhash_delegation(dp
);
3651 nfs4_unlock_state();
3658 * Lock owner state (byte-range locks)
3660 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3661 #define LOCK_HASH_BITS 8
3662 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3663 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3666 end_offset(u64 start
, u64 len
)
3671 return end
>= start
? end
: NFS4_MAX_UINT64
;
3674 /* last octet in a range */
3676 last_byte_offset(u64 start
, u64 len
)
3682 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3685 static inline unsigned int
3686 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3687 struct xdr_netobj
*ownername
)
3689 return (file_hashval(inode
) + cl_id
3690 + opaque_hashval(ownername
->data
, ownername
->len
))
3694 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3697 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3698 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3699 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3700 * locking, this prevents us from being completely protocol-compliant. The
3701 * real solution to this problem is to start using unsigned file offsets in
3702 * the VFS, but this is a very deep change!
3705 nfs4_transform_lock_offset(struct file_lock
*lock
)
3707 if (lock
->fl_start
< 0)
3708 lock
->fl_start
= OFFSET_MAX
;
3709 if (lock
->fl_end
< 0)
3710 lock
->fl_end
= OFFSET_MAX
;
3713 /* Hack!: For now, we're defining this just so we can use a pointer to it
3714 * as a unique cookie to identify our (NFSv4's) posix locks. */
3715 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3719 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3721 struct nfs4_lockowner
*lo
;
3723 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3724 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3725 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3726 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3727 if (!deny
->ld_owner
.data
)
3728 /* We just don't care that much */
3730 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3731 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3734 deny
->ld_owner
.len
= 0;
3735 deny
->ld_owner
.data
= NULL
;
3736 deny
->ld_clientid
.cl_boot
= 0;
3737 deny
->ld_clientid
.cl_id
= 0;
3739 deny
->ld_start
= fl
->fl_start
;
3740 deny
->ld_length
= NFS4_MAX_UINT64
;
3741 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3742 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3743 deny
->ld_type
= NFS4_READ_LT
;
3744 if (fl
->fl_type
!= F_RDLCK
)
3745 deny
->ld_type
= NFS4_WRITE_LT
;
3748 static struct nfs4_lockowner
*
3749 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3750 struct xdr_netobj
*owner
)
3752 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3753 struct nfs4_stateowner
*op
;
3755 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3756 if (same_owner_str(op
, owner
, clid
))
3757 return lockowner(op
);
3762 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3764 list_add(&lo
->lo_owner
.so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3765 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3769 * Alloc a lock owner structure.
3770 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3773 * strhashval = lock_ownerstr_hashval
3776 static struct nfs4_lockowner
*
3777 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3778 struct nfs4_lockowner
*lo
;
3780 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3783 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3784 lo
->lo_owner
.so_is_open_owner
= 0;
3785 /* It is the openowner seqid that will be incremented in encode in the
3786 * case of new lockowners; so increment the lock seqid manually: */
3787 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3788 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3792 static struct nfs4_ol_stateid
*
3793 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3795 struct nfs4_ol_stateid
*stp
;
3796 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3799 stp
= nfs4_alloc_stateid();
3802 status
= init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3804 free_generic_stateid(stp
);
3807 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3808 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3809 stp
->st_stateowner
= &lo
->lo_owner
;
3812 stp
->st_access_bmap
= 0;
3813 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3814 stp
->st_openstp
= open_stp
;
3819 check_lock_length(u64 offset
, u64 length
)
3821 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3822 LOFF_OVERFLOW(offset
, length
)));
3825 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
3827 struct nfs4_file
*fp
= lock_stp
->st_file
;
3828 int oflag
= nfs4_access_to_omode(access
);
3830 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3832 nfs4_file_get_access(fp
, oflag
);
3833 __set_bit(access
, &lock_stp
->st_access_bmap
);
3840 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3841 struct nfsd4_lock
*lock
)
3843 struct nfs4_openowner
*open_sop
= NULL
;
3844 struct nfs4_lockowner
*lock_sop
= NULL
;
3845 struct nfs4_ol_stateid
*lock_stp
;
3846 struct nfs4_file
*fp
;
3847 struct file
*filp
= NULL
;
3848 struct file_lock file_lock
;
3849 struct file_lock conflock
;
3851 unsigned int strhashval
;
3855 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3856 (long long) lock
->lk_offset
,
3857 (long long) lock
->lk_length
);
3859 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3860 return nfserr_inval
;
3862 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3863 S_IFREG
, NFSD_MAY_LOCK
))) {
3864 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3870 if (lock
->lk_is_new
) {
3872 * Client indicates that this is a new lockowner.
3873 * Use open owner and open stateid to create lock owner and
3876 struct nfs4_ol_stateid
*open_stp
= NULL
;
3878 status
= nfserr_stale_clientid
;
3879 if (!nfsd4_has_session(cstate
) &&
3880 STALE_CLIENTID(&lock
->lk_new_clientid
))
3883 /* validate and update open stateid and open seqid */
3884 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
3885 lock
->lk_new_open_seqid
,
3886 &lock
->lk_new_open_stateid
,
3890 open_sop
= openowner(open_stp
->st_stateowner
);
3891 status
= nfserr_bad_stateid
;
3892 if (!nfsd4_has_session(cstate
) &&
3893 !same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
3894 &lock
->v
.new.clientid
))
3896 /* create lockowner and lock stateid */
3897 fp
= open_stp
->st_file
;
3898 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3899 open_sop
->oo_owner
.so_client
->cl_clientid
.cl_id
,
3900 &lock
->v
.new.owner
);
3901 /* XXX: Do we need to check for duplicate stateowners on
3902 * the same file, or should they just be allowed (and
3903 * create new stateids)? */
3904 status
= nfserr_jukebox
;
3905 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3906 open_sop
->oo_owner
.so_client
, open_stp
, lock
);
3907 if (lock_sop
== NULL
)
3909 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3910 if (lock_stp
== NULL
)
3913 /* lock (lock owner + lock stateid) already exists */
3914 status
= nfs4_preprocess_seqid_op(cstate
,
3915 lock
->lk_old_lock_seqid
,
3916 &lock
->lk_old_lock_stateid
,
3917 NFS4_LOCK_STID
, &lock_stp
);
3920 lock_sop
= lockowner(lock_stp
->st_stateowner
);
3921 fp
= lock_stp
->st_file
;
3923 /* lock_sop and lock_stp have been created or found */
3925 lkflg
= setlkflg(lock
->lk_type
);
3926 status
= nfs4_check_openmode(lock_stp
, lkflg
);
3930 status
= nfserr_grace
;
3931 if (locks_in_grace() && !lock
->lk_reclaim
)
3933 status
= nfserr_no_grace
;
3934 if (!locks_in_grace() && lock
->lk_reclaim
)
3937 locks_init_lock(&file_lock
);
3938 switch (lock
->lk_type
) {
3941 filp
= find_readable_file(lock_stp
->st_file
);
3943 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
3944 file_lock
.fl_type
= F_RDLCK
;
3947 case NFS4_WRITEW_LT
:
3948 filp
= find_writeable_file(lock_stp
->st_file
);
3950 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
3951 file_lock
.fl_type
= F_WRLCK
;
3954 status
= nfserr_inval
;
3958 status
= nfserr_openmode
;
3961 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3962 file_lock
.fl_pid
= current
->tgid
;
3963 file_lock
.fl_file
= filp
;
3964 file_lock
.fl_flags
= FL_POSIX
;
3965 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3967 file_lock
.fl_start
= lock
->lk_offset
;
3968 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3969 nfs4_transform_lock_offset(&file_lock
);
3972 * Try to lock the file in the VFS.
3973 * Note: locks.c uses the BKL to protect the inode's lock list.
3976 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
3978 case 0: /* success! */
3979 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
3980 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
3984 case (EAGAIN
): /* conflock holds conflicting lock */
3985 status
= nfserr_denied
;
3986 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3987 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3990 status
= nfserr_deadlock
;
3993 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3994 status
= nfserrno(err
);
3998 if (status
&& lock
->lk_is_new
&& lock_sop
)
3999 release_lockowner(lock_sop
);
4000 if (!cstate
->replay_owner
)
4001 nfs4_unlock_state();
4006 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4007 * so we do a temporary open here just to get an open file to pass to
4008 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4011 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4016 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4019 err
= vfs_test_lock(file
, lock
);
4028 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4029 struct nfsd4_lockt
*lockt
)
4031 struct inode
*inode
;
4032 struct file_lock file_lock
;
4033 struct nfs4_lockowner
*lo
;
4037 if (locks_in_grace())
4038 return nfserr_grace
;
4040 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4041 return nfserr_inval
;
4045 status
= nfserr_stale_clientid
;
4046 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4049 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4052 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4053 locks_init_lock(&file_lock
);
4054 switch (lockt
->lt_type
) {
4057 file_lock
.fl_type
= F_RDLCK
;
4060 case NFS4_WRITEW_LT
:
4061 file_lock
.fl_type
= F_WRLCK
;
4064 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4065 status
= nfserr_inval
;
4069 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4071 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4072 file_lock
.fl_pid
= current
->tgid
;
4073 file_lock
.fl_flags
= FL_POSIX
;
4075 file_lock
.fl_start
= lockt
->lt_offset
;
4076 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4078 nfs4_transform_lock_offset(&file_lock
);
4081 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4083 status
= nfserrno(error
);
4086 if (file_lock
.fl_type
!= F_UNLCK
) {
4087 status
= nfserr_denied
;
4088 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4091 nfs4_unlock_state();
4096 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4097 struct nfsd4_locku
*locku
)
4099 struct nfs4_ol_stateid
*stp
;
4100 struct file
*filp
= NULL
;
4101 struct file_lock file_lock
;
4105 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4106 (long long) locku
->lu_offset
,
4107 (long long) locku
->lu_length
);
4109 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4110 return nfserr_inval
;
4114 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4115 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4118 filp
= find_any_file(stp
->st_file
);
4120 status
= nfserr_lock_range
;
4124 locks_init_lock(&file_lock
);
4125 file_lock
.fl_type
= F_UNLCK
;
4126 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4127 file_lock
.fl_pid
= current
->tgid
;
4128 file_lock
.fl_file
= filp
;
4129 file_lock
.fl_flags
= FL_POSIX
;
4130 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4131 file_lock
.fl_start
= locku
->lu_offset
;
4133 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4134 nfs4_transform_lock_offset(&file_lock
);
4137 * Try to unlock the file in the VFS.
4139 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4141 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4145 * OK, unlock succeeded; the only thing left to do is update the stateid.
4147 update_stateid(&stp
->st_stid
.sc_stateid
);
4148 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4151 if (!cstate
->replay_owner
)
4152 nfs4_unlock_state();
4156 status
= nfserrno(err
);
4162 * 1: locks held by lockowner
4163 * 0: no locks held by lockowner
4166 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4168 struct file_lock
**flpp
;
4169 struct inode
*inode
= filp
->fi_inode
;
4173 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4174 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4185 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4186 struct nfsd4_compound_state
*cstate
,
4187 struct nfsd4_release_lockowner
*rlockowner
)
4189 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4190 struct nfs4_stateowner
*sop
;
4191 struct nfs4_lockowner
*lo
;
4192 struct nfs4_ol_stateid
*stp
;
4193 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4194 struct list_head matches
;
4198 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4199 clid
->cl_boot
, clid
->cl_id
);
4201 /* XXX check for lease expiration */
4203 status
= nfserr_stale_clientid
;
4204 if (STALE_CLIENTID(clid
))
4209 status
= nfserr_locks_held
;
4210 /* XXX: we're doing a linear search through all the lockowners.
4211 * Yipes! For now we'll just hope clients aren't really using
4212 * release_lockowner much, but eventually we have to fix these
4213 * data structures. */
4214 INIT_LIST_HEAD(&matches
);
4215 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4216 list_for_each_entry(sop
, &lock_ownerstr_hashtbl
[i
], so_strhash
) {
4217 if (!same_owner_str(sop
, owner
, clid
))
4219 list_for_each_entry(stp
, &sop
->so_stateids
,
4221 lo
= lockowner(sop
);
4222 if (check_for_locks(stp
->st_file
, lo
))
4224 list_add(&lo
->lo_list
, &matches
);
4228 /* Clients probably won't expect us to return with some (but not all)
4229 * of the lockowner state released; so don't release any until all
4230 * have been checked. */
4232 while (!list_empty(&matches
)) {
4233 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4235 /* unhash_stateowner deletes so_perclient only
4236 * for openowners. */
4237 list_del(&lo
->lo_list
);
4238 release_lockowner(lo
);
4241 nfs4_unlock_state();
4245 static inline struct nfs4_client_reclaim
*
4248 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4252 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4254 unsigned int strhashval
= clientstr_hashval(name
);
4255 struct nfs4_client
*clp
;
4257 clp
= find_confirmed_client_by_str(name
, strhashval
);
4262 * failure => all reset bets are off, nfserr_no_grace...
4265 nfs4_client_to_reclaim(const char *name
)
4267 unsigned int strhashval
;
4268 struct nfs4_client_reclaim
*crp
= NULL
;
4270 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4271 crp
= alloc_reclaim();
4274 strhashval
= clientstr_hashval(name
);
4275 INIT_LIST_HEAD(&crp
->cr_strhash
);
4276 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4277 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4278 reclaim_str_hashtbl_size
++;
4283 nfs4_release_reclaim(void)
4285 struct nfs4_client_reclaim
*crp
= NULL
;
4288 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4289 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4290 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4291 struct nfs4_client_reclaim
, cr_strhash
);
4292 list_del(&crp
->cr_strhash
);
4294 reclaim_str_hashtbl_size
--;
4297 BUG_ON(reclaim_str_hashtbl_size
);
4301 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4302 static struct nfs4_client_reclaim
*
4303 nfs4_find_reclaim_client(clientid_t
*clid
)
4305 unsigned int strhashval
;
4306 struct nfs4_client
*clp
;
4307 struct nfs4_client_reclaim
*crp
= NULL
;
4310 /* find clientid in conf_id_hashtbl */
4311 clp
= find_confirmed_client(clid
);
4315 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4316 clp
->cl_name
.len
, clp
->cl_name
.data
,
4319 /* find clp->cl_name in reclaim_str_hashtbl */
4320 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4321 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4322 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4330 * Called from OPEN. Look for clientid in reclaim list.
4333 nfs4_check_open_reclaim(clientid_t
*clid
)
4335 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4338 /* initialization to perform at module load time: */
4341 nfs4_state_init(void)
4345 status
= nfsd4_init_slabs();
4348 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4349 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4350 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4351 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4352 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4353 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4355 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4356 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4357 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4358 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4360 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4361 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4363 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4364 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4366 memset(&onestateid
, ~0, sizeof(stateid_t
));
4367 INIT_LIST_HEAD(&close_lru
);
4368 INIT_LIST_HEAD(&client_lru
);
4369 INIT_LIST_HEAD(&del_recall_lru
);
4370 reclaim_str_hashtbl_size
= 0;
4375 nfsd4_load_reboot_recovery_data(void)
4380 nfsd4_init_recdir();
4381 status
= nfsd4_recdir_load();
4382 nfs4_unlock_state();
4384 printk("NFSD: Failure reading reboot recovery data\n");
4388 * Since the lifetime of a delegation isn't limited to that of an open, a
4389 * client may quite reasonably hang on to a delegation as long as it has
4390 * the inode cached. This becomes an obvious problem the first time a
4391 * client's inode cache approaches the size of the server's total memory.
4393 * For now we avoid this problem by imposing a hard limit on the number
4394 * of delegations, which varies according to the server's memory size.
4397 set_max_delegations(void)
4400 * Allow at most 4 delegations per megabyte of RAM. Quick
4401 * estimates suggest that in the worst case (where every delegation
4402 * is for a different inode), a delegation could take about 1.5K,
4403 * giving a worst case usage of about 6% of memory.
4405 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4408 /* initialization to perform when the nfsd service is started: */
4411 __nfs4_state_start(void)
4415 boot_time
= get_seconds();
4416 locks_start_grace(&nfsd4_manager
);
4417 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4419 ret
= set_callback_cred();
4422 laundry_wq
= create_singlethread_workqueue("nfsd4");
4423 if (laundry_wq
== NULL
)
4425 ret
= nfsd4_create_callback_queue();
4427 goto out_free_laundry
;
4428 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4429 set_max_delegations();
4432 destroy_workqueue(laundry_wq
);
4437 nfs4_state_start(void)
4439 nfsd4_load_reboot_recovery_data();
4440 return __nfs4_state_start();
4444 __nfs4_state_shutdown(void)
4447 struct nfs4_client
*clp
= NULL
;
4448 struct nfs4_delegation
*dp
= NULL
;
4449 struct list_head
*pos
, *next
, reaplist
;
4451 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4452 while (!list_empty(&conf_id_hashtbl
[i
])) {
4453 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4456 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4457 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4461 INIT_LIST_HEAD(&reaplist
);
4462 spin_lock(&recall_lock
);
4463 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4464 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4465 list_move(&dp
->dl_recall_lru
, &reaplist
);
4467 spin_unlock(&recall_lock
);
4468 list_for_each_safe(pos
, next
, &reaplist
) {
4469 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4470 list_del_init(&dp
->dl_recall_lru
);
4471 unhash_delegation(dp
);
4474 nfsd4_shutdown_recdir();
4478 nfs4_state_shutdown(void)
4480 cancel_delayed_work_sync(&laundromat_work
);
4481 destroy_workqueue(laundry_wq
);
4482 locks_end_grace(&nfsd4_manager
);
4484 nfs4_release_reclaim();
4485 __nfs4_state_shutdown();
4486 nfs4_unlock_state();
4487 nfsd4_destroy_callback_queue();