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
;
107 static void nfsd4_free_file(struct nfs4_file
*f
)
109 kmem_cache_free(file_slab
, f
);
113 put_nfs4_file(struct nfs4_file
*fi
)
115 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
116 list_del(&fi
->fi_hash
);
117 spin_unlock(&recall_lock
);
124 get_nfs4_file(struct nfs4_file
*fi
)
126 atomic_inc(&fi
->fi_ref
);
129 static int num_delegations
;
130 unsigned int max_delegations
;
133 * Open owner state (share locks)
136 /* hash tables for open owners */
137 #define OPEN_OWNER_HASH_BITS 8
138 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
139 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
141 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
145 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
147 return ret
& OPEN_OWNER_HASH_MASK
;
150 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
152 /* hash table for nfs4_file */
153 #define FILE_HASH_BITS 8
154 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
156 static unsigned int file_hashval(struct inode
*ino
)
158 /* XXX: why are we hashing on inode pointer, anyway? */
159 return hash_ptr(ino
, FILE_HASH_BITS
);
162 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
164 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
166 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
167 atomic_inc(&fp
->fi_access
[oflag
]);
170 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
172 if (oflag
== O_RDWR
) {
173 __nfs4_file_get_access(fp
, O_RDONLY
);
174 __nfs4_file_get_access(fp
, O_WRONLY
);
176 __nfs4_file_get_access(fp
, oflag
);
179 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
181 if (fp
->fi_fds
[oflag
]) {
182 fput(fp
->fi_fds
[oflag
]);
183 fp
->fi_fds
[oflag
] = NULL
;
187 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
189 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
190 nfs4_file_put_fd(fp
, oflag
);
192 * It's also safe to get rid of the RDWR open *if*
193 * we no longer have need of the other kind of access
194 * or if we already have the other kind of open:
196 if (fp
->fi_fds
[1-oflag
]
197 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
198 nfs4_file_put_fd(fp
, O_RDWR
);
202 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
204 if (oflag
== O_RDWR
) {
205 __nfs4_file_put_access(fp
, O_RDONLY
);
206 __nfs4_file_put_access(fp
, O_WRONLY
);
208 __nfs4_file_put_access(fp
, oflag
);
211 static inline int get_new_stid(struct nfs4_stid
*stid
)
213 static int min_stateid
= 0;
214 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
218 if (!idr_pre_get(stateids
, GFP_KERNEL
))
221 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
223 * All this code is currently serialized; the preallocation
224 * above should still be ours:
228 * It shouldn't be a problem to reuse an opaque stateid value.
229 * I don't think it is for 4.1. But with 4.0 I worry that, for
230 * example, a stray write retransmission could be accepted by
231 * the server when it should have been rejected. Therefore,
232 * adopt a trick from the sctp code to attempt to maximize the
233 * amount of time until an id is reused, by ensuring they always
234 * "increase" (mod INT_MAX):
237 min_stateid
= new_stid
+1;
238 if (min_stateid
== INT_MAX
)
243 static inline __be32
init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
245 stateid_t
*s
= &stid
->sc_stateid
;
248 stid
->sc_type
= type
;
249 stid
->sc_client
= cl
;
250 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
251 new_id
= get_new_stid(stid
);
253 return nfserr_jukebox
;
254 s
->si_opaque
.so_id
= (u32
)new_id
;
255 /* Will be incremented before return to client: */
256 s
->si_generation
= 0;
260 static struct nfs4_delegation
*
261 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
263 struct nfs4_delegation
*dp
;
264 struct nfs4_file
*fp
= stp
->st_file
;
267 dprintk("NFSD alloc_init_deleg\n");
269 * Major work on the lease subsystem (for example, to support
270 * calbacks on stat) will be required before we can support
271 * write delegations properly.
273 if (type
!= NFS4_OPEN_DELEGATE_READ
)
275 if (fp
->fi_had_conflict
)
277 if (num_delegations
> max_delegations
)
279 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
282 status
= init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
284 kmem_cache_free(deleg_slab
, dp
);
288 * delegation seqid's are never incremented. The 4.1 special
289 * meaning of seqid 0 isn't meaningful, really, but let's avoid
290 * 0 anyway just for consistency and use 1:
292 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
294 INIT_LIST_HEAD(&dp
->dl_perfile
);
295 INIT_LIST_HEAD(&dp
->dl_perclnt
);
296 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
300 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
302 atomic_set(&dp
->dl_count
, 1);
303 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
308 nfs4_put_delegation(struct nfs4_delegation
*dp
)
310 if (atomic_dec_and_test(&dp
->dl_count
)) {
311 dprintk("NFSD: freeing dp %p\n",dp
);
312 put_nfs4_file(dp
->dl_file
);
313 kmem_cache_free(deleg_slab
, dp
);
318 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
320 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
321 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
323 fput(fp
->fi_deleg_file
);
324 fp
->fi_deleg_file
= NULL
;
328 static void unhash_stid(struct nfs4_stid
*s
)
330 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
332 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
335 /* Called under the state lock. */
337 unhash_delegation(struct nfs4_delegation
*dp
)
339 unhash_stid(&dp
->dl_stid
);
340 list_del_init(&dp
->dl_perclnt
);
341 spin_lock(&recall_lock
);
342 list_del_init(&dp
->dl_perfile
);
343 list_del_init(&dp
->dl_recall_lru
);
344 spin_unlock(&recall_lock
);
345 nfs4_put_deleg_lease(dp
->dl_file
);
346 nfs4_put_delegation(dp
);
353 /* client_lock protects the client lru list and session hash table */
354 static DEFINE_SPINLOCK(client_lock
);
356 /* Hash tables for nfs4_clientid state */
357 #define CLIENT_HASH_BITS 4
358 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
359 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
361 static unsigned int clientid_hashval(u32 id
)
363 return id
& CLIENT_HASH_MASK
;
366 static unsigned int clientstr_hashval(const char *name
)
368 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
372 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
373 * used in reboot/reset lease grace period processing
375 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
376 * setclientid_confirmed info.
378 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
381 * client_lru holds client queue ordered by nfs4_client.cl_time
384 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
385 * for last close replay.
387 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
388 static int reclaim_str_hashtbl_size
= 0;
389 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
390 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
391 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
392 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
393 static struct list_head client_lru
;
394 static struct list_head close_lru
;
397 * We store the NONE, READ, WRITE, and BOTH bits separately in the
398 * st_{access,deny}_bmap field of the stateid, in order to track not
399 * only what share bits are currently in force, but also what
400 * combinations of share bits previous opens have used. This allows us
401 * to enforce the recommendation of rfc 3530 14.2.19 that the server
402 * return an error if the client attempt to downgrade to a combination
403 * of share bits not explicable by closing some of its previous opens.
405 * XXX: This enforcement is actually incomplete, since we don't keep
406 * track of access/deny bit combinations; so, e.g., we allow:
408 * OPEN allow read, deny write
409 * OPEN allow both, deny none
410 * DOWNGRADE allow read, deny none
412 * which we should reject.
415 set_access(unsigned int *access
, unsigned long bmap
) {
419 for (i
= 1; i
< 4; i
++) {
420 if (test_bit(i
, &bmap
))
426 set_deny(unsigned int *deny
, unsigned long bmap
) {
430 for (i
= 0; i
< 4; i
++) {
431 if (test_bit(i
, &bmap
))
437 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
438 unsigned int access
, deny
;
440 set_access(&access
, stp
->st_access_bmap
);
441 set_deny(&deny
, stp
->st_deny_bmap
);
442 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
447 static int nfs4_access_to_omode(u32 access
)
449 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
450 case NFS4_SHARE_ACCESS_READ
:
452 case NFS4_SHARE_ACCESS_WRITE
:
454 case NFS4_SHARE_ACCESS_BOTH
:
460 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
462 list_del(&stp
->st_perfile
);
463 list_del(&stp
->st_perstateowner
);
466 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
470 if (stp
->st_access_bmap
) {
471 for (i
= 1; i
< 4; i
++) {
472 if (test_bit(i
, &stp
->st_access_bmap
))
473 nfs4_file_put_access(stp
->st_file
,
474 nfs4_access_to_omode(i
));
475 __clear_bit(i
, &stp
->st_access_bmap
);
478 put_nfs4_file(stp
->st_file
);
482 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
484 kmem_cache_free(stateid_slab
, stp
);
487 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
491 unhash_generic_stateid(stp
);
492 unhash_stid(&stp
->st_stid
);
493 file
= find_any_file(stp
->st_file
);
495 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
496 close_generic_stateid(stp
);
497 free_generic_stateid(stp
);
500 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
502 struct nfs4_ol_stateid
*stp
;
504 list_del(&lo
->lo_owner
.so_strhash
);
505 list_del(&lo
->lo_perstateid
);
506 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
507 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
508 struct nfs4_ol_stateid
, st_perstateowner
);
509 release_lock_stateid(stp
);
513 static void release_lockowner(struct nfs4_lockowner
*lo
)
515 unhash_lockowner(lo
);
516 nfs4_free_lockowner(lo
);
520 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
522 struct nfs4_lockowner
*lo
;
524 while (!list_empty(&open_stp
->st_lockowners
)) {
525 lo
= list_entry(open_stp
->st_lockowners
.next
,
526 struct nfs4_lockowner
, lo_perstateid
);
527 release_lockowner(lo
);
531 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
533 unhash_generic_stateid(stp
);
534 release_stateid_lockowners(stp
);
535 close_generic_stateid(stp
);
538 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
540 unhash_open_stateid(stp
);
541 unhash_stid(&stp
->st_stid
);
542 free_generic_stateid(stp
);
545 static void unhash_openowner(struct nfs4_openowner
*oo
)
547 struct nfs4_ol_stateid
*stp
;
549 list_del(&oo
->oo_owner
.so_strhash
);
550 list_del(&oo
->oo_perclient
);
551 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
552 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
553 struct nfs4_ol_stateid
, st_perstateowner
);
554 release_open_stateid(stp
);
558 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
560 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
563 unhash_stid(&s
->st_stid
);
564 free_generic_stateid(s
);
565 oo
->oo_last_closed_stid
= NULL
;
569 static void release_openowner(struct nfs4_openowner
*oo
)
571 unhash_openowner(oo
);
572 list_del(&oo
->oo_close_lru
);
573 release_last_closed_stateid(oo
);
574 nfs4_free_openowner(oo
);
577 #define SESSION_HASH_SIZE 512
578 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
581 hash_sessionid(struct nfs4_sessionid
*sessionid
)
583 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
585 return sid
->sequence
% SESSION_HASH_SIZE
;
589 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
591 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
592 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
596 gen_sessionid(struct nfsd4_session
*ses
)
598 struct nfs4_client
*clp
= ses
->se_client
;
599 struct nfsd4_sessionid
*sid
;
601 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
602 sid
->clientid
= clp
->cl_clientid
;
603 sid
->sequence
= current_sessionid
++;
608 * The protocol defines ca_maxresponssize_cached to include the size of
609 * the rpc header, but all we need to cache is the data starting after
610 * the end of the initial SEQUENCE operation--the rest we regenerate
611 * each time. Therefore we can advertise a ca_maxresponssize_cached
612 * value that is the number of bytes in our cache plus a few additional
613 * bytes. In order to stay on the safe side, and not promise more than
614 * we can cache, those additional bytes must be the minimum possible: 24
615 * bytes of rpc header (xid through accept state, with AUTH_NULL
616 * verifier), 12 for the compound header (with zero-length tag), and 44
617 * for the SEQUENCE op response:
619 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
622 free_session_slots(struct nfsd4_session
*ses
)
626 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
627 kfree(ses
->se_slots
[i
]);
631 * We don't actually need to cache the rpc and session headers, so we
632 * can allocate a little less for each slot:
634 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
636 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
639 static int nfsd4_sanitize_slot_size(u32 size
)
641 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
642 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
648 * XXX: If we run out of reserved DRC memory we could (up to a point)
649 * re-negotiate active sessions and reduce their slot usage to make
650 * rooom for new connections. For now we just fail the create session.
652 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
656 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
658 spin_lock(&nfsd_drc_lock
);
659 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
660 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
661 num
= min_t(int, num
, avail
/ slotsize
);
662 nfsd_drc_mem_used
+= num
* slotsize
;
663 spin_unlock(&nfsd_drc_lock
);
668 static void nfsd4_put_drc_mem(int slotsize
, int num
)
670 spin_lock(&nfsd_drc_lock
);
671 nfsd_drc_mem_used
-= slotsize
* num
;
672 spin_unlock(&nfsd_drc_lock
);
675 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
677 struct nfsd4_session
*new;
680 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
681 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
682 mem
= numslots
* sizeof(struct nfsd4_slot
*);
684 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
687 /* allocate each struct nfsd4_slot and data cache in one piece */
688 for (i
= 0; i
< numslots
; i
++) {
689 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
690 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
691 if (!new->se_slots
[i
])
697 kfree(new->se_slots
[i
]);
702 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
704 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
706 new->maxreqs
= numslots
;
707 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
708 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
709 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
710 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
711 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
714 static void free_conn(struct nfsd4_conn
*c
)
716 svc_xprt_put(c
->cn_xprt
);
720 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
722 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
723 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
725 spin_lock(&clp
->cl_lock
);
726 if (!list_empty(&c
->cn_persession
)) {
727 list_del(&c
->cn_persession
);
730 spin_unlock(&clp
->cl_lock
);
731 nfsd4_probe_callback(clp
);
734 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
736 struct nfsd4_conn
*conn
;
738 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
741 svc_xprt_get(rqstp
->rq_xprt
);
742 conn
->cn_xprt
= rqstp
->rq_xprt
;
743 conn
->cn_flags
= flags
;
744 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
748 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
750 conn
->cn_session
= ses
;
751 list_add(&conn
->cn_persession
, &ses
->se_conns
);
754 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
756 struct nfs4_client
*clp
= ses
->se_client
;
758 spin_lock(&clp
->cl_lock
);
759 __nfsd4_hash_conn(conn
, ses
);
760 spin_unlock(&clp
->cl_lock
);
763 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
765 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
766 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
769 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
771 struct nfsd4_conn
*conn
;
774 conn
= alloc_conn(rqstp
, dir
);
776 return nfserr_jukebox
;
777 nfsd4_hash_conn(conn
, ses
);
778 ret
= nfsd4_register_conn(conn
);
780 /* oops; xprt is already down: */
781 nfsd4_conn_lost(&conn
->cn_xpt_user
);
785 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
787 u32 dir
= NFS4_CDFC4_FORE
;
789 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
790 dir
|= NFS4_CDFC4_BACK
;
792 return nfsd4_new_conn(rqstp
, ses
, dir
);
795 /* must be called under client_lock */
796 static void nfsd4_del_conns(struct nfsd4_session
*s
)
798 struct nfs4_client
*clp
= s
->se_client
;
799 struct nfsd4_conn
*c
;
801 spin_lock(&clp
->cl_lock
);
802 while (!list_empty(&s
->se_conns
)) {
803 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
804 list_del_init(&c
->cn_persession
);
805 spin_unlock(&clp
->cl_lock
);
807 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
810 spin_lock(&clp
->cl_lock
);
812 spin_unlock(&clp
->cl_lock
);
815 void free_session(struct kref
*kref
)
817 struct nfsd4_session
*ses
;
820 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
821 nfsd4_del_conns(ses
);
822 spin_lock(&nfsd_drc_lock
);
823 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
824 nfsd_drc_mem_used
-= mem
;
825 spin_unlock(&nfsd_drc_lock
);
826 free_session_slots(ses
);
830 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
832 struct nfsd4_session
*new;
833 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
834 int numslots
, slotsize
;
839 * Note decreasing slot size below client's request may
840 * make it difficult for client to function correctly, whereas
841 * decreasing the number of slots will (just?) affect
842 * performance. When short on memory we therefore prefer to
843 * decrease number of slots instead of their size.
845 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
846 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
850 new = alloc_session(slotsize
, numslots
);
852 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
855 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
857 new->se_client
= clp
;
860 INIT_LIST_HEAD(&new->se_conns
);
862 new->se_cb_seq_nr
= 1;
863 new->se_flags
= cses
->flags
;
864 new->se_cb_prog
= cses
->callback_prog
;
865 kref_init(&new->se_ref
);
866 idx
= hash_sessionid(&new->se_sessionid
);
867 spin_lock(&client_lock
);
868 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
869 spin_lock(&clp
->cl_lock
);
870 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
871 spin_unlock(&clp
->cl_lock
);
872 spin_unlock(&client_lock
);
874 status
= nfsd4_new_conn_from_crses(rqstp
, new);
875 /* whoops: benny points out, status is ignored! (err, or bogus) */
877 free_session(&new->se_ref
);
880 if (cses
->flags
& SESSION4_BACK_CHAN
) {
881 struct sockaddr
*sa
= svc_addr(rqstp
);
883 * This is a little silly; with sessions there's no real
884 * use for the callback address. Use the peer address
885 * as a reasonable default for now, but consider fixing
886 * the rpc client not to require an address in the
889 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
890 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
892 nfsd4_probe_callback(clp
);
896 /* caller must hold client_lock */
897 static struct nfsd4_session
*
898 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
900 struct nfsd4_session
*elem
;
903 dump_sessionid(__func__
, sessionid
);
904 idx
= hash_sessionid(sessionid
);
905 /* Search in the appropriate list */
906 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
907 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
908 NFS4_MAX_SESSIONID_LEN
)) {
913 dprintk("%s: session not found\n", __func__
);
917 /* caller must hold client_lock */
919 unhash_session(struct nfsd4_session
*ses
)
921 list_del(&ses
->se_hash
);
922 spin_lock(&ses
->se_client
->cl_lock
);
923 list_del(&ses
->se_perclnt
);
924 spin_unlock(&ses
->se_client
->cl_lock
);
927 /* must be called under the client_lock */
929 renew_client_locked(struct nfs4_client
*clp
)
931 if (is_client_expired(clp
)) {
932 dprintk("%s: client (clientid %08x/%08x) already expired\n",
934 clp
->cl_clientid
.cl_boot
,
935 clp
->cl_clientid
.cl_id
);
939 dprintk("renewing client (clientid %08x/%08x)\n",
940 clp
->cl_clientid
.cl_boot
,
941 clp
->cl_clientid
.cl_id
);
942 list_move_tail(&clp
->cl_lru
, &client_lru
);
943 clp
->cl_time
= get_seconds();
947 renew_client(struct nfs4_client
*clp
)
949 spin_lock(&client_lock
);
950 renew_client_locked(clp
);
951 spin_unlock(&client_lock
);
954 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
956 STALE_CLIENTID(clientid_t
*clid
)
958 if (clid
->cl_boot
== boot_time
)
960 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
961 clid
->cl_boot
, clid
->cl_id
, boot_time
);
966 * XXX Should we use a slab cache ?
967 * This type of memory management is somewhat inefficient, but we use it
968 * anyway since SETCLIENTID is not a common operation.
970 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
972 struct nfs4_client
*clp
;
974 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
977 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
978 if (clp
->cl_name
.data
== NULL
) {
982 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
983 clp
->cl_name
.len
= name
.len
;
988 free_client(struct nfs4_client
*clp
)
990 while (!list_empty(&clp
->cl_sessions
)) {
991 struct nfsd4_session
*ses
;
992 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
994 list_del(&ses
->se_perclnt
);
995 nfsd4_put_session(ses
);
997 if (clp
->cl_cred
.cr_group_info
)
998 put_group_info(clp
->cl_cred
.cr_group_info
);
999 kfree(clp
->cl_principal
);
1000 kfree(clp
->cl_name
.data
);
1005 release_session_client(struct nfsd4_session
*session
)
1007 struct nfs4_client
*clp
= session
->se_client
;
1009 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1011 if (is_client_expired(clp
)) {
1013 session
->se_client
= NULL
;
1015 renew_client_locked(clp
);
1016 spin_unlock(&client_lock
);
1019 /* must be called under the client_lock */
1021 unhash_client_locked(struct nfs4_client
*clp
)
1023 struct nfsd4_session
*ses
;
1025 mark_client_expired(clp
);
1026 list_del(&clp
->cl_lru
);
1027 spin_lock(&clp
->cl_lock
);
1028 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1029 list_del_init(&ses
->se_hash
);
1030 spin_unlock(&clp
->cl_lock
);
1034 expire_client(struct nfs4_client
*clp
)
1036 struct nfs4_openowner
*oo
;
1037 struct nfs4_delegation
*dp
;
1038 struct list_head reaplist
;
1040 INIT_LIST_HEAD(&reaplist
);
1041 spin_lock(&recall_lock
);
1042 while (!list_empty(&clp
->cl_delegations
)) {
1043 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1044 list_del_init(&dp
->dl_perclnt
);
1045 list_move(&dp
->dl_recall_lru
, &reaplist
);
1047 spin_unlock(&recall_lock
);
1048 while (!list_empty(&reaplist
)) {
1049 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1050 list_del_init(&dp
->dl_recall_lru
);
1051 unhash_delegation(dp
);
1053 while (!list_empty(&clp
->cl_openowners
)) {
1054 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1055 release_openowner(oo
);
1057 nfsd4_shutdown_callback(clp
);
1058 if (clp
->cl_cb_conn
.cb_xprt
)
1059 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1060 list_del(&clp
->cl_idhash
);
1061 list_del(&clp
->cl_strhash
);
1062 spin_lock(&client_lock
);
1063 unhash_client_locked(clp
);
1064 if (atomic_read(&clp
->cl_refcount
) == 0)
1066 spin_unlock(&client_lock
);
1069 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1071 memcpy(target
->cl_verifier
.data
, source
->data
,
1072 sizeof(target
->cl_verifier
.data
));
1075 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1077 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1078 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1081 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1083 target
->cr_uid
= source
->cr_uid
;
1084 target
->cr_gid
= source
->cr_gid
;
1085 target
->cr_group_info
= source
->cr_group_info
;
1086 get_group_info(target
->cr_group_info
);
1089 static int same_name(const char *n1
, const char *n2
)
1091 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1095 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1097 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1101 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1103 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1106 /* XXX what about NGROUP */
1108 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1110 return cr1
->cr_uid
== cr2
->cr_uid
;
1113 static void gen_clid(struct nfs4_client
*clp
)
1115 static u32 current_clientid
= 1;
1117 clp
->cl_clientid
.cl_boot
= boot_time
;
1118 clp
->cl_clientid
.cl_id
= current_clientid
++;
1121 static void gen_confirm(struct nfs4_client
*clp
)
1126 p
= (u32
*)clp
->cl_confirm
.data
;
1127 *p
++ = get_seconds();
1131 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1133 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1136 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1138 struct nfs4_stid
*s
;
1140 s
= find_stateid(cl
, t
);
1143 if (typemask
& s
->sc_type
)
1148 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1149 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1151 struct nfs4_client
*clp
;
1152 struct sockaddr
*sa
= svc_addr(rqstp
);
1155 clp
= alloc_client(name
);
1159 INIT_LIST_HEAD(&clp
->cl_sessions
);
1161 princ
= svc_gss_principal(rqstp
);
1163 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1164 if (clp
->cl_principal
== NULL
) {
1170 idr_init(&clp
->cl_stateids
);
1171 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1172 atomic_set(&clp
->cl_refcount
, 0);
1173 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1174 INIT_LIST_HEAD(&clp
->cl_idhash
);
1175 INIT_LIST_HEAD(&clp
->cl_strhash
);
1176 INIT_LIST_HEAD(&clp
->cl_openowners
);
1177 INIT_LIST_HEAD(&clp
->cl_delegations
);
1178 INIT_LIST_HEAD(&clp
->cl_lru
);
1179 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1180 spin_lock_init(&clp
->cl_lock
);
1181 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1182 clp
->cl_time
= get_seconds();
1183 clear_bit(0, &clp
->cl_cb_slot_busy
);
1184 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1185 copy_verf(clp
, verf
);
1186 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1187 clp
->cl_flavor
= rqstp
->rq_flavor
;
1188 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1190 clp
->cl_cb_session
= NULL
;
1195 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1197 unsigned int idhashval
;
1199 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1200 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1201 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1206 move_to_confirmed(struct nfs4_client
*clp
)
1208 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1209 unsigned int strhashval
;
1211 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1212 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1213 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1214 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1218 static struct nfs4_client
*
1219 find_confirmed_client(clientid_t
*clid
)
1221 struct nfs4_client
*clp
;
1222 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1224 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1225 if (same_clid(&clp
->cl_clientid
, clid
)) {
1233 static struct nfs4_client
*
1234 find_unconfirmed_client(clientid_t
*clid
)
1236 struct nfs4_client
*clp
;
1237 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1239 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1240 if (same_clid(&clp
->cl_clientid
, clid
))
1246 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1248 return clp
->cl_exchange_flags
!= 0;
1251 static struct nfs4_client
*
1252 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1254 struct nfs4_client
*clp
;
1256 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1257 if (same_name(clp
->cl_recdir
, dname
))
1263 static struct nfs4_client
*
1264 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1266 struct nfs4_client
*clp
;
1268 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1269 if (same_name(clp
->cl_recdir
, dname
))
1276 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1278 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1279 struct sockaddr
*sa
= svc_addr(rqstp
);
1280 u32 scopeid
= rpc_get_scope_id(sa
);
1281 unsigned short expected_family
;
1283 /* Currently, we only support tcp and tcp6 for the callback channel */
1284 if (se
->se_callback_netid_len
== 3 &&
1285 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1286 expected_family
= AF_INET
;
1287 else if (se
->se_callback_netid_len
== 4 &&
1288 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1289 expected_family
= AF_INET6
;
1293 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1294 se
->se_callback_addr_len
,
1295 (struct sockaddr
*)&conn
->cb_addr
,
1296 sizeof(conn
->cb_addr
));
1298 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1301 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1302 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1304 conn
->cb_prog
= se
->se_callback_prog
;
1305 conn
->cb_ident
= se
->se_callback_ident
;
1306 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1309 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1310 conn
->cb_addrlen
= 0;
1311 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1312 "will not receive delegations\n",
1313 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1319 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1322 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1324 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1327 dprintk("--> %s slot %p\n", __func__
, slot
);
1329 slot
->sl_opcnt
= resp
->opcnt
;
1330 slot
->sl_status
= resp
->cstate
.status
;
1332 if (nfsd4_not_cached(resp
)) {
1333 slot
->sl_datalen
= 0;
1336 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1337 base
= (char *)resp
->cstate
.datap
-
1338 (char *)resp
->xbuf
->head
[0].iov_base
;
1339 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1341 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1346 * Encode the replay sequence operation from the slot values.
1347 * If cachethis is FALSE encode the uncached rep error on the next
1348 * operation which sets resp->p and increments resp->opcnt for
1349 * nfs4svc_encode_compoundres.
1353 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1354 struct nfsd4_compoundres
*resp
)
1356 struct nfsd4_op
*op
;
1357 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1359 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1360 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1362 /* Encode the replayed sequence operation */
1363 op
= &args
->ops
[resp
->opcnt
- 1];
1364 nfsd4_encode_operation(resp
, op
);
1366 /* Return nfserr_retry_uncached_rep in next operation. */
1367 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1368 op
= &args
->ops
[resp
->opcnt
++];
1369 op
->status
= nfserr_retry_uncached_rep
;
1370 nfsd4_encode_operation(resp
, op
);
1376 * The sequence operation is not cached because we can use the slot and
1380 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1381 struct nfsd4_sequence
*seq
)
1383 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1386 dprintk("--> %s slot %p\n", __func__
, slot
);
1388 /* Either returns 0 or nfserr_retry_uncached */
1389 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1390 if (status
== nfserr_retry_uncached_rep
)
1393 /* The sequence operation has been encoded, cstate->datap set. */
1394 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1396 resp
->opcnt
= slot
->sl_opcnt
;
1397 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1398 status
= slot
->sl_status
;
1404 * Set the exchange_id flags returned by the server.
1407 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1409 /* pNFS is not supported */
1410 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1412 /* Referrals are supported, Migration is not. */
1413 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1415 /* set the wire flags to return to client. */
1416 clid
->flags
= new->cl_exchange_flags
;
1420 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1421 struct nfsd4_compound_state
*cstate
,
1422 struct nfsd4_exchange_id
*exid
)
1424 struct nfs4_client
*unconf
, *conf
, *new;
1426 unsigned int strhashval
;
1427 char dname
[HEXDIR_LEN
];
1428 char addr_str
[INET6_ADDRSTRLEN
];
1429 nfs4_verifier verf
= exid
->verifier
;
1430 struct sockaddr
*sa
= svc_addr(rqstp
);
1432 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1433 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1434 "ip_addr=%s flags %x, spa_how %d\n",
1435 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1436 addr_str
, exid
->flags
, exid
->spa_how
);
1438 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1439 return nfserr_inval
;
1441 /* Currently only support SP4_NONE */
1442 switch (exid
->spa_how
) {
1446 return nfserr_serverfault
;
1448 BUG(); /* checked by xdr code */
1450 return nfserr_serverfault
; /* no excuse :-/ */
1453 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1458 strhashval
= clientstr_hashval(dname
);
1463 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1465 if (!clp_used_exchangeid(conf
)) {
1466 status
= nfserr_clid_inuse
; /* XXX: ? */
1469 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1470 /* 18.35.4 case 8 */
1471 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1472 status
= nfserr_not_same
;
1475 /* Client reboot: destroy old state */
1476 expire_client(conf
);
1479 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1480 /* 18.35.4 case 9 */
1481 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1482 status
= nfserr_perm
;
1485 expire_client(conf
);
1489 * Set bit when the owner id and verifier map to an already
1490 * confirmed client id (18.35.3).
1492 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1495 * Falling into 18.35.4 case 2, possible router replay.
1496 * Leave confirmed record intact and return same result.
1498 copy_verf(conf
, &verf
);
1503 /* 18.35.4 case 7 */
1504 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1505 status
= nfserr_noent
;
1509 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1512 * Possible retry or client restart. Per 18.35.4 case 4,
1513 * a new unconfirmed record should be generated regardless
1514 * of whether any properties have changed.
1516 expire_client(unconf
);
1521 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1523 status
= nfserr_jukebox
;
1528 add_to_unconfirmed(new, strhashval
);
1530 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1531 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1534 nfsd4_set_ex_flags(new, exid
);
1536 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1537 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1541 nfs4_unlock_state();
1543 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1548 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1550 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1553 /* The slot is in use, and no response has been sent. */
1555 if (seqid
== slot_seqid
)
1556 return nfserr_jukebox
;
1558 return nfserr_seq_misordered
;
1561 if (likely(seqid
== slot_seqid
+ 1))
1564 if (seqid
== slot_seqid
)
1565 return nfserr_replay_cache
;
1567 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1569 /* Misordered replay or misordered new request */
1570 return nfserr_seq_misordered
;
1574 * Cache the create session result into the create session single DRC
1575 * slot cache by saving the xdr structure. sl_seqid has been set.
1576 * Do this for solo or embedded create session operations.
1579 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1580 struct nfsd4_clid_slot
*slot
, int nfserr
)
1582 slot
->sl_status
= nfserr
;
1583 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1587 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1588 struct nfsd4_clid_slot
*slot
)
1590 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1591 return slot
->sl_status
;
1594 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1595 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1596 1 + /* MIN tag is length with zero, only length */ \
1597 3 + /* version, opcount, opcode */ \
1598 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1599 /* seqid, slotID, slotID, cache */ \
1600 4 ) * sizeof(__be32))
1602 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1603 2 + /* verifier: AUTH_NULL, length 0 */\
1605 1 + /* MIN tag is length with zero, only length */ \
1606 3 + /* opcount, opcode, opstatus*/ \
1607 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1608 /* seqid, slotID, slotID, slotID, status */ \
1609 5 ) * sizeof(__be32))
1611 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1613 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1614 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1618 nfsd4_create_session(struct svc_rqst
*rqstp
,
1619 struct nfsd4_compound_state
*cstate
,
1620 struct nfsd4_create_session
*cr_ses
)
1622 struct sockaddr
*sa
= svc_addr(rqstp
);
1623 struct nfs4_client
*conf
, *unconf
;
1624 struct nfsd4_session
*new;
1625 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1626 bool confirm_me
= false;
1629 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1630 return nfserr_inval
;
1633 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1634 conf
= find_confirmed_client(&cr_ses
->clientid
);
1637 cs_slot
= &conf
->cl_cs_slot
;
1638 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1639 if (status
== nfserr_replay_cache
) {
1640 dprintk("Got a create_session replay! seqid= %d\n",
1642 /* Return the cached reply status */
1643 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1645 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1646 status
= nfserr_seq_misordered
;
1647 dprintk("Sequence misordered!\n");
1648 dprintk("Expected seqid= %d but got seqid= %d\n",
1649 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1652 } else if (unconf
) {
1653 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1654 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1655 status
= nfserr_clid_inuse
;
1659 cs_slot
= &unconf
->cl_cs_slot
;
1660 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1662 /* an unconfirmed replay returns misordered */
1663 status
= nfserr_seq_misordered
;
1670 status
= nfserr_stale_clientid
;
1675 * XXX: we should probably set this at creation time, and check
1676 * for consistent minorversion use throughout:
1678 conf
->cl_minorversion
= 1;
1680 * We do not support RDMA or persistent sessions
1682 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1683 cr_ses
->flags
&= ~SESSION4_RDMA
;
1685 status
= nfserr_toosmall
;
1686 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1689 status
= nfserr_jukebox
;
1690 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1694 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1695 NFS4_MAX_SESSIONID_LEN
);
1696 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1697 sizeof(struct nfsd4_channel_attrs
));
1698 cs_slot
->sl_seqid
++;
1699 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1701 /* cache solo and embedded create sessions under the state lock */
1702 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1704 move_to_confirmed(conf
);
1706 nfs4_unlock_state();
1707 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1711 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1713 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1714 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1716 return argp
->opcnt
== resp
->opcnt
;
1719 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1722 case NFS4_CDFC4_FORE
:
1723 case NFS4_CDFC4_BACK
:
1725 case NFS4_CDFC4_FORE_OR_BOTH
:
1726 case NFS4_CDFC4_BACK_OR_BOTH
:
1727 *dir
= NFS4_CDFC4_BOTH
;
1730 return nfserr_inval
;
1733 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1734 struct nfsd4_compound_state
*cstate
,
1735 struct nfsd4_bind_conn_to_session
*bcts
)
1739 if (!nfsd4_last_compound_op(rqstp
))
1740 return nfserr_not_only_op
;
1741 spin_lock(&client_lock
);
1742 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1743 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1744 * client_lock iself: */
1745 if (cstate
->session
) {
1746 nfsd4_get_session(cstate
->session
);
1747 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1749 spin_unlock(&client_lock
);
1750 if (!cstate
->session
)
1751 return nfserr_badsession
;
1753 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1755 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1759 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1763 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1767 nfsd4_destroy_session(struct svc_rqst
*r
,
1768 struct nfsd4_compound_state
*cstate
,
1769 struct nfsd4_destroy_session
*sessionid
)
1771 struct nfsd4_session
*ses
;
1772 u32 status
= nfserr_badsession
;
1775 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1776 * - Should we return nfserr_back_chan_busy if waiting for
1777 * callbacks on to-be-destroyed session?
1778 * - Do we need to clear any callback info from previous session?
1781 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1782 if (!nfsd4_last_compound_op(r
))
1783 return nfserr_not_only_op
;
1785 dump_sessionid(__func__
, &sessionid
->sessionid
);
1786 spin_lock(&client_lock
);
1787 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1789 spin_unlock(&client_lock
);
1793 unhash_session(ses
);
1794 spin_unlock(&client_lock
);
1797 nfsd4_probe_callback_sync(ses
->se_client
);
1798 nfs4_unlock_state();
1800 nfsd4_del_conns(ses
);
1802 nfsd4_put_session(ses
);
1805 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1809 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1811 struct nfsd4_conn
*c
;
1813 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1814 if (c
->cn_xprt
== xpt
) {
1821 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1823 struct nfs4_client
*clp
= ses
->se_client
;
1824 struct nfsd4_conn
*c
;
1827 spin_lock(&clp
->cl_lock
);
1828 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1830 spin_unlock(&clp
->cl_lock
);
1834 __nfsd4_hash_conn(new, ses
);
1835 spin_unlock(&clp
->cl_lock
);
1836 ret
= nfsd4_register_conn(new);
1838 /* oops; xprt is already down: */
1839 nfsd4_conn_lost(&new->cn_xpt_user
);
1843 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1845 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1847 return args
->opcnt
> session
->se_fchannel
.maxops
;
1850 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1851 struct nfsd4_session
*session
)
1853 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1855 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1859 nfsd4_sequence(struct svc_rqst
*rqstp
,
1860 struct nfsd4_compound_state
*cstate
,
1861 struct nfsd4_sequence
*seq
)
1863 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1864 struct nfsd4_session
*session
;
1865 struct nfsd4_slot
*slot
;
1866 struct nfsd4_conn
*conn
;
1869 if (resp
->opcnt
!= 1)
1870 return nfserr_sequence_pos
;
1873 * Will be either used or freed by nfsd4_sequence_check_conn
1876 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1878 return nfserr_jukebox
;
1880 spin_lock(&client_lock
);
1881 status
= nfserr_badsession
;
1882 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1886 status
= nfserr_too_many_ops
;
1887 if (nfsd4_session_too_many_ops(rqstp
, session
))
1890 status
= nfserr_req_too_big
;
1891 if (nfsd4_request_too_big(rqstp
, session
))
1894 status
= nfserr_badslot
;
1895 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1898 slot
= session
->se_slots
[seq
->slotid
];
1899 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1901 /* We do not negotiate the number of slots yet, so set the
1902 * maxslots to the session maxreqs which is used to encode
1903 * sr_highest_slotid and the sr_target_slot id to maxslots */
1904 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1906 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1907 if (status
== nfserr_replay_cache
) {
1908 cstate
->slot
= slot
;
1909 cstate
->session
= session
;
1910 /* Return the cached reply status and set cstate->status
1911 * for nfsd4_proc_compound processing */
1912 status
= nfsd4_replay_cache_entry(resp
, seq
);
1913 cstate
->status
= nfserr_replay_cache
;
1919 nfsd4_sequence_check_conn(conn
, session
);
1922 /* Success! bump slot seqid */
1923 slot
->sl_inuse
= true;
1924 slot
->sl_seqid
= seq
->seqid
;
1925 slot
->sl_cachethis
= seq
->cachethis
;
1927 cstate
->slot
= slot
;
1928 cstate
->session
= session
;
1931 /* Hold a session reference until done processing the compound. */
1932 if (cstate
->session
) {
1933 struct nfs4_client
*clp
= session
->se_client
;
1935 nfsd4_get_session(cstate
->session
);
1936 atomic_inc(&clp
->cl_refcount
);
1937 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1938 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1941 spin_unlock(&client_lock
);
1942 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1947 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1951 if (rc
->rca_one_fs
) {
1952 if (!cstate
->current_fh
.fh_dentry
)
1953 return nfserr_nofilehandle
;
1955 * We don't take advantage of the rca_one_fs case.
1956 * That's OK, it's optional, we can safely ignore it.
1962 status
= nfserr_complete_already
;
1963 if (cstate
->session
->se_client
->cl_firststate
)
1966 status
= nfserr_stale_clientid
;
1967 if (is_client_expired(cstate
->session
->se_client
))
1969 * The following error isn't really legal.
1970 * But we only get here if the client just explicitly
1971 * destroyed the client. Surely it no longer cares what
1972 * error it gets back on an operation for the dead
1978 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1980 nfs4_unlock_state();
1985 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1986 struct nfsd4_setclientid
*setclid
)
1988 struct xdr_netobj clname
= setclid
->se_name
;
1989 nfs4_verifier clverifier
= setclid
->se_verf
;
1990 unsigned int strhashval
;
1991 struct nfs4_client
*conf
, *unconf
, *new;
1993 char dname
[HEXDIR_LEN
];
1995 status
= nfs4_make_rec_clidname(dname
, &clname
);
2000 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2001 * We get here on a DRC miss.
2004 strhashval
= clientstr_hashval(dname
);
2007 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2009 /* RFC 3530 14.2.33 CASE 0: */
2010 status
= nfserr_clid_inuse
;
2011 if (clp_used_exchangeid(conf
))
2013 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2014 char addr_str
[INET6_ADDRSTRLEN
];
2015 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2017 dprintk("NFSD: setclientid: string in use by client "
2018 "at %s\n", addr_str
);
2023 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2024 * has a description of SETCLIENTID request processing consisting
2025 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2027 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2028 status
= nfserr_jukebox
;
2031 * RFC 3530 14.2.33 CASE 4:
2032 * placed first, because it is the normal case
2035 expire_client(unconf
);
2036 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2040 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2042 * RFC 3530 14.2.33 CASE 1:
2043 * probable callback update
2046 /* Note this is removing unconfirmed {*x***},
2047 * which is stronger than RFC recommended {vxc**}.
2048 * This has the advantage that there is at most
2049 * one {*x***} in either list at any time.
2051 expire_client(unconf
);
2053 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2056 copy_clid(new, conf
);
2057 } else if (!unconf
) {
2059 * RFC 3530 14.2.33 CASE 2:
2060 * probable client reboot; state will be removed if
2063 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2069 * RFC 3530 14.2.33 CASE 3:
2070 * probable client reboot; state will be removed if
2073 expire_client(unconf
);
2074 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2080 * XXX: we should probably set this at creation time, and check
2081 * for consistent minorversion use throughout:
2083 new->cl_minorversion
= 0;
2084 gen_callback(new, setclid
, rqstp
);
2085 add_to_unconfirmed(new, strhashval
);
2086 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2087 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2088 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2091 nfs4_unlock_state();
2097 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2098 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2099 * bullets, labeled as CASE1 - CASE4 below.
2102 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2103 struct nfsd4_compound_state
*cstate
,
2104 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2106 struct sockaddr
*sa
= svc_addr(rqstp
);
2107 struct nfs4_client
*conf
, *unconf
;
2108 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2109 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2112 if (STALE_CLIENTID(clid
))
2113 return nfserr_stale_clientid
;
2115 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2116 * We get here on a DRC miss.
2121 conf
= find_confirmed_client(clid
);
2122 unconf
= find_unconfirmed_client(clid
);
2124 status
= nfserr_clid_inuse
;
2125 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2127 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2131 * section 14.2.34 of RFC 3530 has a description of
2132 * SETCLIENTID_CONFIRM request processing consisting
2133 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2135 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2137 * RFC 3530 14.2.34 CASE 1:
2140 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2141 status
= nfserr_clid_inuse
;
2143 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2144 nfsd4_probe_callback(conf
);
2145 expire_client(unconf
);
2149 } else if (conf
&& !unconf
) {
2151 * RFC 3530 14.2.34 CASE 2:
2152 * probable retransmitted request; play it safe and
2155 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2156 status
= nfserr_clid_inuse
;
2159 } else if (!conf
&& unconf
2160 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2162 * RFC 3530 14.2.34 CASE 3:
2163 * Normal case; new or rebooted client:
2165 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2166 status
= nfserr_clid_inuse
;
2169 clientstr_hashval(unconf
->cl_recdir
);
2170 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2173 nfsd4_remove_clid_dir(conf
);
2174 expire_client(conf
);
2176 move_to_confirmed(unconf
);
2178 nfsd4_probe_callback(conf
);
2181 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2182 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2185 * RFC 3530 14.2.34 CASE 4:
2186 * Client probably hasn't noticed that we rebooted yet.
2188 status
= nfserr_stale_clientid
;
2190 /* check that we have hit one of the cases...*/
2191 status
= nfserr_clid_inuse
;
2194 nfs4_unlock_state();
2198 static struct nfs4_file
*nfsd4_alloc_file(void)
2200 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2203 /* OPEN Share state helper functions */
2204 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2206 unsigned int hashval
= file_hashval(ino
);
2208 atomic_set(&fp
->fi_ref
, 1);
2209 INIT_LIST_HEAD(&fp
->fi_hash
);
2210 INIT_LIST_HEAD(&fp
->fi_stateids
);
2211 INIT_LIST_HEAD(&fp
->fi_delegations
);
2212 fp
->fi_inode
= igrab(ino
);
2213 fp
->fi_had_conflict
= false;
2214 fp
->fi_lease
= NULL
;
2215 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2216 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2217 spin_lock(&recall_lock
);
2218 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2219 spin_unlock(&recall_lock
);
2223 nfsd4_free_slab(struct kmem_cache
**slab
)
2227 kmem_cache_destroy(*slab
);
2232 nfsd4_free_slabs(void)
2234 nfsd4_free_slab(&openowner_slab
);
2235 nfsd4_free_slab(&lockowner_slab
);
2236 nfsd4_free_slab(&file_slab
);
2237 nfsd4_free_slab(&stateid_slab
);
2238 nfsd4_free_slab(&deleg_slab
);
2242 nfsd4_init_slabs(void)
2244 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2245 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2246 if (openowner_slab
== NULL
)
2248 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2249 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2250 if (lockowner_slab
== NULL
)
2252 file_slab
= kmem_cache_create("nfsd4_files",
2253 sizeof(struct nfs4_file
), 0, 0, NULL
);
2254 if (file_slab
== NULL
)
2256 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2257 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2258 if (stateid_slab
== NULL
)
2260 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2261 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2262 if (deleg_slab
== NULL
)
2267 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2271 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2273 kfree(oo
->oo_owner
.so_owner
.data
);
2274 kmem_cache_free(openowner_slab
, oo
);
2277 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2279 kfree(lo
->lo_owner
.so_owner
.data
);
2280 kmem_cache_free(lockowner_slab
, lo
);
2283 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2285 rp
->rp_status
= nfserr_serverfault
;
2287 rp
->rp_buf
= rp
->rp_ibuf
;
2290 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2292 struct nfs4_stateowner
*sop
;
2294 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2298 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2299 if (!sop
->so_owner
.data
) {
2300 kmem_cache_free(slab
, sop
);
2303 sop
->so_owner
.len
= owner
->len
;
2305 INIT_LIST_HEAD(&sop
->so_stateids
);
2306 sop
->so_client
= clp
;
2307 init_nfs4_replay(&sop
->so_replay
);
2311 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2313 list_add(&oo
->oo_owner
.so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2314 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2317 static struct nfs4_openowner
*
2318 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2319 struct nfs4_openowner
*oo
;
2321 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2324 oo
->oo_owner
.so_is_open_owner
= 1;
2325 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2326 oo
->oo_flags
= NFS4_OO_NEW
;
2328 oo
->oo_last_closed_stid
= NULL
;
2329 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2330 hash_openowner(oo
, clp
, strhashval
);
2334 static inline __be32
init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2335 struct nfs4_openowner
*oo
= open
->op_openowner
;
2336 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2339 status
= init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2342 INIT_LIST_HEAD(&stp
->st_lockowners
);
2343 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2344 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2345 stp
->st_stateowner
= &oo
->oo_owner
;
2348 stp
->st_access_bmap
= 0;
2349 stp
->st_deny_bmap
= 0;
2350 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
2351 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2352 stp
->st_openstp
= NULL
;
2357 move_to_close_lru(struct nfs4_openowner
*oo
)
2359 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2361 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2362 oo
->oo_time
= get_seconds();
2366 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2369 return (sop
->so_owner
.len
== owner
->len
) &&
2370 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2371 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2374 static struct nfs4_openowner
*
2375 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2377 struct nfs4_stateowner
*so
;
2378 struct nfs4_openowner
*oo
;
2380 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2381 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2383 renew_client(oo
->oo_owner
.so_client
);
2390 /* search file_hashtbl[] for file */
2391 static struct nfs4_file
*
2392 find_file(struct inode
*ino
)
2394 unsigned int hashval
= file_hashval(ino
);
2395 struct nfs4_file
*fp
;
2397 spin_lock(&recall_lock
);
2398 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2399 if (fp
->fi_inode
== ino
) {
2401 spin_unlock(&recall_lock
);
2405 spin_unlock(&recall_lock
);
2410 * Called to check deny when READ with all zero stateid or
2411 * WRITE with all zero or all one stateid
2414 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2416 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2417 struct nfs4_file
*fp
;
2418 struct nfs4_ol_stateid
*stp
;
2421 dprintk("NFSD: nfs4_share_conflict\n");
2423 fp
= find_file(ino
);
2426 ret
= nfserr_locked
;
2427 /* Search for conflicting share reservations */
2428 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2429 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2430 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2439 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2441 /* We're assuming the state code never drops its reference
2442 * without first removing the lease. Since we're in this lease
2443 * callback (and since the lease code is serialized by the kernel
2444 * lock) we know the server hasn't removed the lease yet, we know
2445 * it's safe to take a reference: */
2446 atomic_inc(&dp
->dl_count
);
2448 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2450 /* only place dl_time is set. protected by lock_flocks*/
2451 dp
->dl_time
= get_seconds();
2453 nfsd4_cb_recall(dp
);
2456 /* Called from break_lease() with lock_flocks() held. */
2457 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2459 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2460 struct nfs4_delegation
*dp
;
2463 /* We assume break_lease is only called once per lease: */
2464 BUG_ON(fp
->fi_had_conflict
);
2466 * We don't want the locks code to timeout the lease for us;
2467 * we'll remove it ourself if a delegation isn't returned
2470 fl
->fl_break_time
= 0;
2472 spin_lock(&recall_lock
);
2473 fp
->fi_had_conflict
= true;
2474 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2475 nfsd_break_one_deleg(dp
);
2476 spin_unlock(&recall_lock
);
2480 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2483 return lease_modify(onlist
, arg
);
2488 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2489 .lm_break
= nfsd_break_deleg_cb
,
2490 .lm_change
= nfsd_change_deleg_cb
,
2493 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2495 if (nfsd4_has_session(cstate
))
2497 if (seqid
== so
->so_seqid
- 1)
2498 return nfserr_replay_me
;
2499 if (seqid
== so
->so_seqid
)
2501 return nfserr_bad_seqid
;
2505 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2506 struct nfsd4_open
*open
)
2508 clientid_t
*clientid
= &open
->op_clientid
;
2509 struct nfs4_client
*clp
= NULL
;
2510 unsigned int strhashval
;
2511 struct nfs4_openowner
*oo
= NULL
;
2513 if (STALE_CLIENTID(&open
->op_clientid
))
2514 return nfserr_stale_clientid
;
2516 * In case we need it later, after we've already created the
2517 * file and don't want to risk a further failure:
2519 open
->op_file
= nfsd4_alloc_file();
2520 if (open
->op_file
== NULL
)
2521 return nfserr_jukebox
;
2523 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2524 oo
= find_openstateowner_str(strhashval
, open
);
2525 open
->op_openowner
= oo
;
2527 clp
= find_confirmed_client(clientid
);
2529 return nfserr_expired
;
2532 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2533 /* Replace unconfirmed owners without checking for replay. */
2534 clp
= oo
->oo_owner
.so_client
;
2535 release_openowner(oo
);
2536 open
->op_openowner
= NULL
;
2539 return nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2541 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2543 return nfserr_jukebox
;
2544 open
->op_openowner
= oo
;
2548 static inline __be32
2549 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2551 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2552 return nfserr_openmode
;
2557 static int share_access_to_flags(u32 share_access
)
2559 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2561 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2564 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2566 struct nfs4_stid
*ret
;
2568 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2571 return delegstateid(ret
);
2575 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2576 struct nfs4_delegation
**dp
)
2579 __be32 status
= nfserr_bad_stateid
;
2581 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2584 flags
= share_access_to_flags(open
->op_share_access
);
2585 status
= nfs4_check_delegmode(*dp
, flags
);
2589 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2593 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2598 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2600 struct nfs4_ol_stateid
*local
;
2601 struct nfs4_openowner
*oo
= open
->op_openowner
;
2603 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2604 /* ignore lock owners */
2605 if (local
->st_stateowner
->so_is_open_owner
== 0)
2607 /* remember if we have seen this open owner */
2608 if (local
->st_stateowner
== &oo
->oo_owner
)
2610 /* check for conflicting share reservations */
2611 if (!test_share(local
, open
))
2612 return nfserr_share_denied
;
2617 static inline struct nfs4_ol_stateid
*
2618 nfs4_alloc_stateid(void)
2620 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2623 static inline int nfs4_access_to_access(u32 nfs4_access
)
2627 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2628 flags
|= NFSD_MAY_READ
;
2629 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2630 flags
|= NFSD_MAY_WRITE
;
2634 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2635 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2638 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2639 int access
= nfs4_access_to_access(open
->op_share_access
);
2641 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2642 * allowing it to break the lease and return EAGAIN leaves the
2643 * client unable to make progress in returning the delegation */
2644 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2645 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2647 if (!fp
->fi_fds
[oflag
]) {
2648 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2649 &fp
->fi_fds
[oflag
]);
2653 nfs4_file_get_access(fp
, oflag
);
2659 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_ol_stateid
**stpp
,
2660 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2661 struct nfsd4_open
*open
)
2663 struct nfs4_ol_stateid
*stp
;
2666 stp
= nfs4_alloc_stateid();
2668 return nfserr_jukebox
;
2670 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2672 kmem_cache_free(stateid_slab
, stp
);
2679 static inline __be32
2680 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2681 struct nfsd4_open
*open
)
2683 struct iattr iattr
= {
2684 .ia_valid
= ATTR_SIZE
,
2687 if (!open
->op_truncate
)
2689 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2690 return nfserr_inval
;
2691 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2695 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
)
2697 u32 op_share_access
= open
->op_share_access
;
2701 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2703 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2707 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2710 int oflag
= nfs4_access_to_omode(op_share_access
);
2711 nfs4_file_put_access(fp
, oflag
);
2715 /* remember the open */
2716 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2717 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2724 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2726 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2727 open
->op_openowner
->oo_owner
.so_client
->cl_firststate
= 1;
2730 /* Should we give out recallable state?: */
2731 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2733 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2736 * In the sessions case, since we don't have to establish a
2737 * separate connection for callbacks, we assume it's OK
2738 * until we hear otherwise:
2740 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2743 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2745 struct file_lock
*fl
;
2747 fl
= locks_alloc_lock();
2750 locks_init_lock(fl
);
2751 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2752 fl
->fl_flags
= FL_LEASE
;
2753 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2754 fl
->fl_end
= OFFSET_MAX
;
2755 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2756 fl
->fl_pid
= current
->tgid
;
2760 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2762 struct nfs4_file
*fp
= dp
->dl_file
;
2763 struct file_lock
*fl
;
2766 fl
= nfs4_alloc_init_lease(dp
, flag
);
2769 fl
->fl_file
= find_readable_file(fp
);
2770 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2771 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2773 list_del_init(&dp
->dl_perclnt
);
2774 locks_free_lock(fl
);
2778 fp
->fi_deleg_file
= fl
->fl_file
;
2779 get_file(fp
->fi_deleg_file
);
2780 atomic_set(&fp
->fi_delegees
, 1);
2781 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2785 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2787 struct nfs4_file
*fp
= dp
->dl_file
;
2790 return nfs4_setlease(dp
, flag
);
2791 spin_lock(&recall_lock
);
2792 if (fp
->fi_had_conflict
) {
2793 spin_unlock(&recall_lock
);
2796 atomic_inc(&fp
->fi_delegees
);
2797 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2798 spin_unlock(&recall_lock
);
2799 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2804 * Attempt to hand out a delegation.
2807 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2809 struct nfs4_delegation
*dp
;
2810 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2812 int status
, flag
= 0;
2814 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2815 flag
= NFS4_OPEN_DELEGATE_NONE
;
2816 open
->op_recall
= 0;
2817 switch (open
->op_claim_type
) {
2818 case NFS4_OPEN_CLAIM_PREVIOUS
:
2820 open
->op_recall
= 1;
2821 flag
= open
->op_delegate_type
;
2822 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2825 case NFS4_OPEN_CLAIM_NULL
:
2826 /* Let's not give out any delegations till everyone's
2827 * had the chance to reclaim theirs.... */
2828 if (locks_in_grace())
2830 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2832 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2833 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2835 flag
= NFS4_OPEN_DELEGATE_READ
;
2841 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2844 status
= nfs4_set_delegation(dp
, flag
);
2848 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2850 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2851 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2853 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2854 && flag
== NFS4_OPEN_DELEGATE_NONE
2855 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2856 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2857 open
->op_delegate_type
= flag
;
2860 nfs4_put_delegation(dp
);
2862 flag
= NFS4_OPEN_DELEGATE_NONE
;
2867 * called with nfs4_lock_state() held.
2870 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2872 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2873 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
2874 struct nfs4_file
*fp
= NULL
;
2875 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2876 struct nfs4_ol_stateid
*stp
= NULL
;
2877 struct nfs4_delegation
*dp
= NULL
;
2881 * Lookup file; if found, lookup stateid and check open request,
2882 * and check for delegations in the process of being recalled.
2883 * If not found, create the nfs4_file struct
2885 fp
= find_file(ino
);
2887 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2889 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
2893 status
= nfserr_bad_stateid
;
2894 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2896 status
= nfserr_jukebox
;
2898 open
->op_file
= NULL
;
2899 nfsd4_init_file(fp
, ino
);
2903 * OPEN the file, or upgrade an existing OPEN.
2904 * If truncate fails, the OPEN fails.
2907 /* Stateid was found, this is an OPEN upgrade */
2908 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2912 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2915 status
= init_open_stateid(stp
, fp
, open
);
2917 release_open_stateid(stp
);
2920 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2922 release_open_stateid(stp
);
2926 update_stateid(&stp
->st_stid
.sc_stateid
);
2927 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
2929 if (nfsd4_has_session(&resp
->cstate
))
2930 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2933 * Attempt to hand out a delegation. No error return, because the
2934 * OPEN succeeds even if we fail.
2936 nfs4_open_delegation(current_fh
, open
, stp
);
2940 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2941 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
2945 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2946 nfs4_set_claim_prev(open
);
2948 * To finish the open response, we just need to set the rflags.
2950 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2951 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
2952 !nfsd4_has_session(&resp
->cstate
))
2953 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2958 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
2960 if (open
->op_openowner
) {
2961 struct nfs4_openowner
*oo
= open
->op_openowner
;
2963 if (!list_empty(&oo
->oo_owner
.so_stateids
))
2964 list_del_init(&oo
->oo_close_lru
);
2965 if (oo
->oo_flags
& NFS4_OO_NEW
) {
2967 release_openowner(oo
);
2968 open
->op_openowner
= NULL
;
2970 oo
->oo_flags
&= ~NFS4_OO_NEW
;
2974 nfsd4_free_file(open
->op_file
);
2978 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2981 struct nfs4_client
*clp
;
2985 dprintk("process_renew(%08x/%08x): starting\n",
2986 clid
->cl_boot
, clid
->cl_id
);
2987 status
= nfserr_stale_clientid
;
2988 if (STALE_CLIENTID(clid
))
2990 clp
= find_confirmed_client(clid
);
2991 status
= nfserr_expired
;
2993 /* We assume the client took too long to RENEW. */
2994 dprintk("nfsd4_renew: clientid not found!\n");
2997 status
= nfserr_cb_path_down
;
2998 if (!list_empty(&clp
->cl_delegations
)
2999 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3003 nfs4_unlock_state();
3007 static struct lock_manager nfsd4_manager
= {
3011 nfsd4_end_grace(void)
3013 dprintk("NFSD: end of grace period\n");
3014 nfsd4_recdir_purge_old();
3015 locks_end_grace(&nfsd4_manager
);
3017 * Now that every NFSv4 client has had the chance to recover and
3018 * to see the (possibly new, possibly shorter) lease time, we
3019 * can safely set the next grace time to the current lease time:
3021 nfsd4_grace
= nfsd4_lease
;
3025 nfs4_laundromat(void)
3027 struct nfs4_client
*clp
;
3028 struct nfs4_openowner
*oo
;
3029 struct nfs4_delegation
*dp
;
3030 struct list_head
*pos
, *next
, reaplist
;
3031 time_t cutoff
= get_seconds() - nfsd4_lease
;
3032 time_t t
, clientid_val
= nfsd4_lease
;
3033 time_t u
, test_val
= nfsd4_lease
;
3037 dprintk("NFSD: laundromat service - starting\n");
3038 if (locks_in_grace())
3040 INIT_LIST_HEAD(&reaplist
);
3041 spin_lock(&client_lock
);
3042 list_for_each_safe(pos
, next
, &client_lru
) {
3043 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3044 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3045 t
= clp
->cl_time
- cutoff
;
3046 if (clientid_val
> t
)
3050 if (atomic_read(&clp
->cl_refcount
)) {
3051 dprintk("NFSD: client in use (clientid %08x)\n",
3052 clp
->cl_clientid
.cl_id
);
3055 unhash_client_locked(clp
);
3056 list_add(&clp
->cl_lru
, &reaplist
);
3058 spin_unlock(&client_lock
);
3059 list_for_each_safe(pos
, next
, &reaplist
) {
3060 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3061 dprintk("NFSD: purging unused client (clientid %08x)\n",
3062 clp
->cl_clientid
.cl_id
);
3063 nfsd4_remove_clid_dir(clp
);
3066 spin_lock(&recall_lock
);
3067 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3068 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3069 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3070 u
= dp
->dl_time
- cutoff
;
3075 list_move(&dp
->dl_recall_lru
, &reaplist
);
3077 spin_unlock(&recall_lock
);
3078 list_for_each_safe(pos
, next
, &reaplist
) {
3079 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3080 list_del_init(&dp
->dl_recall_lru
);
3081 unhash_delegation(dp
);
3083 test_val
= nfsd4_lease
;
3084 list_for_each_safe(pos
, next
, &close_lru
) {
3085 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3086 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3087 u
= oo
->oo_time
- cutoff
;
3092 release_openowner(oo
);
3094 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3095 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3096 nfs4_unlock_state();
3097 return clientid_val
;
3100 static struct workqueue_struct
*laundry_wq
;
3101 static void laundromat_main(struct work_struct
*);
3102 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3105 laundromat_main(struct work_struct
*not_used
)
3109 t
= nfs4_laundromat();
3110 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3111 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3114 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3116 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3117 return nfserr_bad_stateid
;
3122 STALE_STATEID(stateid_t
*stateid
)
3124 if (stateid
->si_opaque
.so_clid
.cl_boot
== boot_time
)
3126 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3127 STATEID_VAL(stateid
));
3132 access_permit_read(unsigned long access_bmap
)
3134 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3135 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3136 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3140 access_permit_write(unsigned long access_bmap
)
3142 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3143 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3147 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3149 __be32 status
= nfserr_openmode
;
3151 /* For lock stateid's, we test the parent open, not the lock: */
3152 if (stp
->st_openstp
)
3153 stp
= stp
->st_openstp
;
3154 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3156 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3163 static inline __be32
3164 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3166 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3168 else if (locks_in_grace()) {
3169 /* Answer in remaining cases depends on existence of
3170 * conflicting state; so we must wait out the grace period. */
3171 return nfserr_grace
;
3172 } else if (flags
& WR_STATE
)
3173 return nfs4_share_conflict(current_fh
,
3174 NFS4_SHARE_DENY_WRITE
);
3175 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3176 return nfs4_share_conflict(current_fh
,
3177 NFS4_SHARE_DENY_READ
);
3181 * Allow READ/WRITE during grace period on recovered state only for files
3182 * that are not able to provide mandatory locking.
3185 grace_disallows_io(struct inode
*inode
)
3187 return locks_in_grace() && mandatory_lock(inode
);
3190 /* Returns true iff a is later than b: */
3191 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3193 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3196 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3199 * When sessions are used the stateid generation number is ignored
3202 if (has_session
&& in
->si_generation
== 0)
3205 if (in
->si_generation
== ref
->si_generation
)
3208 /* If the client sends us a stateid from the future, it's buggy: */
3209 if (stateid_generation_after(in
, ref
))
3210 return nfserr_bad_stateid
;
3212 * However, we could see a stateid from the past, even from a
3213 * non-buggy client. For example, if the client sends a lock
3214 * while some IO is outstanding, the lock may bump si_generation
3215 * while the IO is still in flight. The client could avoid that
3216 * situation by waiting for responses on all the IO requests,
3217 * but better performance may result in retrying IO that
3218 * receives an old_stateid error if requests are rarely
3219 * reordered in flight:
3221 return nfserr_old_stateid
;
3224 __be32
nfs4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3226 struct nfs4_stid
*s
;
3227 struct nfs4_ol_stateid
*ols
;
3230 if (STALE_STATEID(stateid
))
3231 return nfserr_stale_stateid
;
3233 s
= find_stateid(cl
, stateid
);
3235 return nfserr_stale_stateid
;
3236 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3239 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3241 ols
= openlockstateid(s
);
3242 if (ols
->st_stateowner
->so_is_open_owner
3243 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3244 return nfserr_bad_stateid
;
3248 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
)
3250 struct nfs4_client
*cl
;
3252 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3253 return nfserr_bad_stateid
;
3254 if (STALE_STATEID(stateid
))
3255 return nfserr_stale_stateid
;
3256 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
);
3258 return nfserr_expired
;
3259 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3261 return nfserr_bad_stateid
;
3267 * Checks for stateid operations
3270 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3271 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3273 struct nfs4_stid
*s
;
3274 struct nfs4_ol_stateid
*stp
= NULL
;
3275 struct nfs4_delegation
*dp
= NULL
;
3276 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3277 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3283 if (grace_disallows_io(ino
))
3284 return nfserr_grace
;
3286 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3287 return check_special_stateids(current_fh
, stateid
, flags
);
3289 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
);
3292 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3295 switch (s
->sc_type
) {
3296 case NFS4_DELEG_STID
:
3297 dp
= delegstateid(s
);
3298 status
= nfs4_check_delegmode(dp
, flags
);
3302 *filpp
= dp
->dl_file
->fi_deleg_file
;
3306 case NFS4_OPEN_STID
:
3307 case NFS4_LOCK_STID
:
3308 stp
= openlockstateid(s
);
3309 status
= nfs4_check_fh(current_fh
, stp
);
3312 if (stp
->st_stateowner
->so_is_open_owner
3313 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3315 status
= nfs4_check_openmode(stp
, flags
);
3319 if (flags
& RD_STATE
)
3320 *filpp
= find_readable_file(stp
->st_file
);
3322 *filpp
= find_writeable_file(stp
->st_file
);
3326 return nfserr_bad_stateid
;
3334 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3336 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3337 return nfserr_locks_held
;
3338 release_lock_stateid(stp
);
3343 * Test if the stateid is valid
3346 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3347 struct nfsd4_test_stateid
*test_stateid
)
3349 /* real work is done during encoding */
3354 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3355 struct nfsd4_free_stateid
*free_stateid
)
3357 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3358 struct nfs4_stid
*s
;
3359 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3360 __be32 ret
= nfserr_bad_stateid
;
3363 s
= find_stateid(cl
, stateid
);
3366 switch (s
->sc_type
) {
3367 case NFS4_DELEG_STID
:
3368 ret
= nfserr_locks_held
;
3370 case NFS4_OPEN_STID
:
3371 case NFS4_LOCK_STID
:
3372 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3375 if (s
->sc_type
== NFS4_LOCK_STID
)
3376 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3378 ret
= nfserr_locks_held
;
3381 ret
= nfserr_bad_stateid
;
3384 nfs4_unlock_state();
3391 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3392 RD_STATE
: WR_STATE
;
3395 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3397 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3398 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3401 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3404 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3406 * "Closed" stateid's exist *only* to return
3407 * nfserr_replay_me from the previous step.
3409 return nfserr_bad_stateid
;
3410 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3413 return nfs4_check_fh(current_fh
, stp
);
3417 * Checks for sequence id mutating operations.
3420 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3421 stateid_t
*stateid
, char typemask
,
3422 struct nfs4_ol_stateid
**stpp
)
3425 struct nfs4_stid
*s
;
3427 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3428 seqid
, STATEID_VAL(stateid
));
3431 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
);
3434 *stpp
= openlockstateid(s
);
3435 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3437 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3440 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3443 struct nfs4_openowner
*oo
;
3445 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3446 NFS4_OPEN_STID
, stpp
);
3449 oo
= openowner((*stpp
)->st_stateowner
);
3450 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3451 return nfserr_bad_stateid
;
3456 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3457 struct nfsd4_open_confirm
*oc
)
3460 struct nfs4_openowner
*oo
;
3461 struct nfs4_ol_stateid
*stp
;
3463 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3464 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3465 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3467 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3473 status
= nfs4_preprocess_seqid_op(cstate
,
3474 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3475 NFS4_OPEN_STID
, &stp
);
3478 oo
= openowner(stp
->st_stateowner
);
3479 status
= nfserr_bad_stateid
;
3480 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3482 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3483 update_stateid(&stp
->st_stid
.sc_stateid
);
3484 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3485 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3486 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3488 nfsd4_create_clid_dir(oo
->oo_owner
.so_client
);
3491 if (!cstate
->replay_owner
)
3492 nfs4_unlock_state();
3496 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3498 if (!test_bit(access
, &stp
->st_access_bmap
))
3500 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3501 __clear_bit(access
, &stp
->st_access_bmap
);
3504 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3506 switch (to_access
) {
3507 case NFS4_SHARE_ACCESS_READ
:
3508 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3509 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3511 case NFS4_SHARE_ACCESS_WRITE
:
3512 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3513 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3515 case NFS4_SHARE_ACCESS_BOTH
:
3523 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3526 for (i
= 0; i
< 4; i
++) {
3527 if ((i
& deny
) != i
)
3528 __clear_bit(i
, bmap
);
3533 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3534 struct nfsd4_compound_state
*cstate
,
3535 struct nfsd4_open_downgrade
*od
)
3538 struct nfs4_ol_stateid
*stp
;
3540 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3541 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3542 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3544 /* We don't yet support WANT bits: */
3545 od
->od_share_access
&= NFS4_SHARE_ACCESS_MASK
;
3548 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3549 &od
->od_stateid
, &stp
);
3552 status
= nfserr_inval
;
3553 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3554 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3555 stp
->st_access_bmap
, od
->od_share_access
);
3558 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3559 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3560 stp
->st_deny_bmap
, od
->od_share_deny
);
3563 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3565 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3567 update_stateid(&stp
->st_stid
.sc_stateid
);
3568 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3571 if (!cstate
->replay_owner
)
3572 nfs4_unlock_state();
3576 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3578 struct nfs4_openowner
*oo
;
3579 struct nfs4_ol_stateid
*s
;
3581 if (!so
->so_is_open_owner
)
3584 s
= oo
->oo_last_closed_stid
;
3587 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3588 /* Release the last_closed_stid on the next seqid bump: */
3589 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3592 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3593 release_last_closed_stateid(oo
);
3596 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3598 unhash_open_stateid(s
);
3599 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3603 * nfs4_unlock_state() called after encode
3606 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3607 struct nfsd4_close
*close
)
3610 struct nfs4_openowner
*oo
;
3611 struct nfs4_ol_stateid
*stp
;
3613 dprintk("NFSD: nfsd4_close on file %.*s\n",
3614 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3615 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3618 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3620 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3624 oo
= openowner(stp
->st_stateowner
);
3626 update_stateid(&stp
->st_stid
.sc_stateid
);
3627 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3629 nfsd4_close_open_stateid(stp
);
3630 oo
->oo_last_closed_stid
= stp
;
3632 /* place unused nfs4_stateowners on so_close_lru list to be
3633 * released by the laundromat service after the lease period
3634 * to enable us to handle CLOSE replay
3636 if (list_empty(&oo
->oo_owner
.so_stateids
))
3637 move_to_close_lru(oo
);
3639 if (!cstate
->replay_owner
)
3640 nfs4_unlock_state();
3645 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3646 struct nfsd4_delegreturn
*dr
)
3648 struct nfs4_delegation
*dp
;
3649 stateid_t
*stateid
= &dr
->dr_stateid
;
3650 struct nfs4_stid
*s
;
3651 struct inode
*inode
;
3654 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3656 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3659 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
);
3662 dp
= delegstateid(s
);
3663 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3667 unhash_delegation(dp
);
3669 nfs4_unlock_state();
3676 * Lock owner state (byte-range locks)
3678 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3679 #define LOCK_HASH_BITS 8
3680 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3681 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3684 end_offset(u64 start
, u64 len
)
3689 return end
>= start
? end
: NFS4_MAX_UINT64
;
3692 /* last octet in a range */
3694 last_byte_offset(u64 start
, u64 len
)
3700 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3703 static inline unsigned int
3704 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3705 struct xdr_netobj
*ownername
)
3707 return (file_hashval(inode
) + cl_id
3708 + opaque_hashval(ownername
->data
, ownername
->len
))
3712 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3715 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3716 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3717 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3718 * locking, this prevents us from being completely protocol-compliant. The
3719 * real solution to this problem is to start using unsigned file offsets in
3720 * the VFS, but this is a very deep change!
3723 nfs4_transform_lock_offset(struct file_lock
*lock
)
3725 if (lock
->fl_start
< 0)
3726 lock
->fl_start
= OFFSET_MAX
;
3727 if (lock
->fl_end
< 0)
3728 lock
->fl_end
= OFFSET_MAX
;
3731 /* Hack!: For now, we're defining this just so we can use a pointer to it
3732 * as a unique cookie to identify our (NFSv4's) posix locks. */
3733 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3737 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3739 struct nfs4_lockowner
*lo
;
3741 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3742 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3743 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3744 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3745 if (!deny
->ld_owner
.data
)
3746 /* We just don't care that much */
3748 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3749 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3752 deny
->ld_owner
.len
= 0;
3753 deny
->ld_owner
.data
= NULL
;
3754 deny
->ld_clientid
.cl_boot
= 0;
3755 deny
->ld_clientid
.cl_id
= 0;
3757 deny
->ld_start
= fl
->fl_start
;
3758 deny
->ld_length
= NFS4_MAX_UINT64
;
3759 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3760 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3761 deny
->ld_type
= NFS4_READ_LT
;
3762 if (fl
->fl_type
!= F_RDLCK
)
3763 deny
->ld_type
= NFS4_WRITE_LT
;
3766 static struct nfs4_lockowner
*
3767 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3768 struct xdr_netobj
*owner
)
3770 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3771 struct nfs4_stateowner
*op
;
3773 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3774 if (same_owner_str(op
, owner
, clid
))
3775 return lockowner(op
);
3780 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3782 list_add(&lo
->lo_owner
.so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3783 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3787 * Alloc a lock owner structure.
3788 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3791 * strhashval = lock_ownerstr_hashval
3794 static struct nfs4_lockowner
*
3795 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3796 struct nfs4_lockowner
*lo
;
3798 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3801 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3802 lo
->lo_owner
.so_is_open_owner
= 0;
3803 /* It is the openowner seqid that will be incremented in encode in the
3804 * case of new lockowners; so increment the lock seqid manually: */
3805 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3806 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3810 static struct nfs4_ol_stateid
*
3811 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3813 struct nfs4_ol_stateid
*stp
;
3814 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3817 stp
= nfs4_alloc_stateid();
3820 status
= init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3822 free_generic_stateid(stp
);
3825 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3826 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3827 stp
->st_stateowner
= &lo
->lo_owner
;
3830 stp
->st_access_bmap
= 0;
3831 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3832 stp
->st_openstp
= open_stp
;
3837 check_lock_length(u64 offset
, u64 length
)
3839 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3840 LOFF_OVERFLOW(offset
, length
)));
3843 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
3845 struct nfs4_file
*fp
= lock_stp
->st_file
;
3846 int oflag
= nfs4_access_to_omode(access
);
3848 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3850 nfs4_file_get_access(fp
, oflag
);
3851 __set_bit(access
, &lock_stp
->st_access_bmap
);
3858 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3859 struct nfsd4_lock
*lock
)
3861 struct nfs4_openowner
*open_sop
= NULL
;
3862 struct nfs4_lockowner
*lock_sop
= NULL
;
3863 struct nfs4_ol_stateid
*lock_stp
;
3864 struct nfs4_file
*fp
;
3865 struct file
*filp
= NULL
;
3866 struct file_lock file_lock
;
3867 struct file_lock conflock
;
3869 unsigned int strhashval
;
3873 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3874 (long long) lock
->lk_offset
,
3875 (long long) lock
->lk_length
);
3877 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3878 return nfserr_inval
;
3880 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3881 S_IFREG
, NFSD_MAY_LOCK
))) {
3882 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3888 if (lock
->lk_is_new
) {
3890 * Client indicates that this is a new lockowner.
3891 * Use open owner and open stateid to create lock owner and
3894 struct nfs4_ol_stateid
*open_stp
= NULL
;
3896 status
= nfserr_stale_clientid
;
3897 if (!nfsd4_has_session(cstate
) &&
3898 STALE_CLIENTID(&lock
->lk_new_clientid
))
3901 /* validate and update open stateid and open seqid */
3902 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
3903 lock
->lk_new_open_seqid
,
3904 &lock
->lk_new_open_stateid
,
3908 open_sop
= openowner(open_stp
->st_stateowner
);
3909 status
= nfserr_bad_stateid
;
3910 if (!nfsd4_has_session(cstate
) &&
3911 !same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
3912 &lock
->v
.new.clientid
))
3914 /* create lockowner and lock stateid */
3915 fp
= open_stp
->st_file
;
3916 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3917 open_sop
->oo_owner
.so_client
->cl_clientid
.cl_id
,
3918 &lock
->v
.new.owner
);
3919 /* XXX: Do we need to check for duplicate stateowners on
3920 * the same file, or should they just be allowed (and
3921 * create new stateids)? */
3922 status
= nfserr_jukebox
;
3923 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3924 open_sop
->oo_owner
.so_client
, open_stp
, lock
);
3925 if (lock_sop
== NULL
)
3927 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3928 if (lock_stp
== NULL
)
3931 /* lock (lock owner + lock stateid) already exists */
3932 status
= nfs4_preprocess_seqid_op(cstate
,
3933 lock
->lk_old_lock_seqid
,
3934 &lock
->lk_old_lock_stateid
,
3935 NFS4_LOCK_STID
, &lock_stp
);
3938 lock_sop
= lockowner(lock_stp
->st_stateowner
);
3939 fp
= lock_stp
->st_file
;
3941 /* lock_sop and lock_stp have been created or found */
3943 lkflg
= setlkflg(lock
->lk_type
);
3944 status
= nfs4_check_openmode(lock_stp
, lkflg
);
3948 status
= nfserr_grace
;
3949 if (locks_in_grace() && !lock
->lk_reclaim
)
3951 status
= nfserr_no_grace
;
3952 if (!locks_in_grace() && lock
->lk_reclaim
)
3955 locks_init_lock(&file_lock
);
3956 switch (lock
->lk_type
) {
3959 filp
= find_readable_file(lock_stp
->st_file
);
3961 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
3962 file_lock
.fl_type
= F_RDLCK
;
3965 case NFS4_WRITEW_LT
:
3966 filp
= find_writeable_file(lock_stp
->st_file
);
3968 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
3969 file_lock
.fl_type
= F_WRLCK
;
3972 status
= nfserr_inval
;
3976 status
= nfserr_openmode
;
3979 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3980 file_lock
.fl_pid
= current
->tgid
;
3981 file_lock
.fl_file
= filp
;
3982 file_lock
.fl_flags
= FL_POSIX
;
3983 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3985 file_lock
.fl_start
= lock
->lk_offset
;
3986 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3987 nfs4_transform_lock_offset(&file_lock
);
3990 * Try to lock the file in the VFS.
3991 * Note: locks.c uses the BKL to protect the inode's lock list.
3994 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
3996 case 0: /* success! */
3997 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
3998 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4002 case (EAGAIN
): /* conflock holds conflicting lock */
4003 status
= nfserr_denied
;
4004 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4005 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4008 status
= nfserr_deadlock
;
4011 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4012 status
= nfserrno(err
);
4016 if (status
&& lock
->lk_is_new
&& lock_sop
)
4017 release_lockowner(lock_sop
);
4018 if (!cstate
->replay_owner
)
4019 nfs4_unlock_state();
4024 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4025 * so we do a temporary open here just to get an open file to pass to
4026 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4029 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4034 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4037 err
= vfs_test_lock(file
, lock
);
4046 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4047 struct nfsd4_lockt
*lockt
)
4049 struct inode
*inode
;
4050 struct file_lock file_lock
;
4051 struct nfs4_lockowner
*lo
;
4055 if (locks_in_grace())
4056 return nfserr_grace
;
4058 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4059 return nfserr_inval
;
4063 status
= nfserr_stale_clientid
;
4064 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4067 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4070 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4071 locks_init_lock(&file_lock
);
4072 switch (lockt
->lt_type
) {
4075 file_lock
.fl_type
= F_RDLCK
;
4078 case NFS4_WRITEW_LT
:
4079 file_lock
.fl_type
= F_WRLCK
;
4082 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4083 status
= nfserr_inval
;
4087 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4089 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4090 file_lock
.fl_pid
= current
->tgid
;
4091 file_lock
.fl_flags
= FL_POSIX
;
4093 file_lock
.fl_start
= lockt
->lt_offset
;
4094 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4096 nfs4_transform_lock_offset(&file_lock
);
4099 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4101 status
= nfserrno(error
);
4104 if (file_lock
.fl_type
!= F_UNLCK
) {
4105 status
= nfserr_denied
;
4106 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4109 nfs4_unlock_state();
4114 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4115 struct nfsd4_locku
*locku
)
4117 struct nfs4_ol_stateid
*stp
;
4118 struct file
*filp
= NULL
;
4119 struct file_lock file_lock
;
4123 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4124 (long long) locku
->lu_offset
,
4125 (long long) locku
->lu_length
);
4127 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4128 return nfserr_inval
;
4132 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4133 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4136 filp
= find_any_file(stp
->st_file
);
4138 status
= nfserr_lock_range
;
4142 locks_init_lock(&file_lock
);
4143 file_lock
.fl_type
= F_UNLCK
;
4144 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4145 file_lock
.fl_pid
= current
->tgid
;
4146 file_lock
.fl_file
= filp
;
4147 file_lock
.fl_flags
= FL_POSIX
;
4148 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4149 file_lock
.fl_start
= locku
->lu_offset
;
4151 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4152 nfs4_transform_lock_offset(&file_lock
);
4155 * Try to unlock the file in the VFS.
4157 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4159 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4163 * OK, unlock succeeded; the only thing left to do is update the stateid.
4165 update_stateid(&stp
->st_stid
.sc_stateid
);
4166 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4169 if (!cstate
->replay_owner
)
4170 nfs4_unlock_state();
4174 status
= nfserrno(err
);
4180 * 1: locks held by lockowner
4181 * 0: no locks held by lockowner
4184 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4186 struct file_lock
**flpp
;
4187 struct inode
*inode
= filp
->fi_inode
;
4191 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4192 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4203 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4204 struct nfsd4_compound_state
*cstate
,
4205 struct nfsd4_release_lockowner
*rlockowner
)
4207 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4208 struct nfs4_stateowner
*sop
;
4209 struct nfs4_lockowner
*lo
;
4210 struct nfs4_ol_stateid
*stp
;
4211 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4212 struct list_head matches
;
4216 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4217 clid
->cl_boot
, clid
->cl_id
);
4219 /* XXX check for lease expiration */
4221 status
= nfserr_stale_clientid
;
4222 if (STALE_CLIENTID(clid
))
4227 status
= nfserr_locks_held
;
4228 /* XXX: we're doing a linear search through all the lockowners.
4229 * Yipes! For now we'll just hope clients aren't really using
4230 * release_lockowner much, but eventually we have to fix these
4231 * data structures. */
4232 INIT_LIST_HEAD(&matches
);
4233 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4234 list_for_each_entry(sop
, &lock_ownerstr_hashtbl
[i
], so_strhash
) {
4235 if (!same_owner_str(sop
, owner
, clid
))
4237 list_for_each_entry(stp
, &sop
->so_stateids
,
4239 lo
= lockowner(sop
);
4240 if (check_for_locks(stp
->st_file
, lo
))
4242 list_add(&lo
->lo_list
, &matches
);
4246 /* Clients probably won't expect us to return with some (but not all)
4247 * of the lockowner state released; so don't release any until all
4248 * have been checked. */
4250 while (!list_empty(&matches
)) {
4251 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4253 /* unhash_stateowner deletes so_perclient only
4254 * for openowners. */
4255 list_del(&lo
->lo_list
);
4256 release_lockowner(lo
);
4259 nfs4_unlock_state();
4263 static inline struct nfs4_client_reclaim
*
4266 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4270 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4272 unsigned int strhashval
= clientstr_hashval(name
);
4273 struct nfs4_client
*clp
;
4275 clp
= find_confirmed_client_by_str(name
, strhashval
);
4280 * failure => all reset bets are off, nfserr_no_grace...
4283 nfs4_client_to_reclaim(const char *name
)
4285 unsigned int strhashval
;
4286 struct nfs4_client_reclaim
*crp
= NULL
;
4288 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4289 crp
= alloc_reclaim();
4292 strhashval
= clientstr_hashval(name
);
4293 INIT_LIST_HEAD(&crp
->cr_strhash
);
4294 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4295 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4296 reclaim_str_hashtbl_size
++;
4301 nfs4_release_reclaim(void)
4303 struct nfs4_client_reclaim
*crp
= NULL
;
4306 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4307 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4308 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4309 struct nfs4_client_reclaim
, cr_strhash
);
4310 list_del(&crp
->cr_strhash
);
4312 reclaim_str_hashtbl_size
--;
4315 BUG_ON(reclaim_str_hashtbl_size
);
4319 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4320 static struct nfs4_client_reclaim
*
4321 nfs4_find_reclaim_client(clientid_t
*clid
)
4323 unsigned int strhashval
;
4324 struct nfs4_client
*clp
;
4325 struct nfs4_client_reclaim
*crp
= NULL
;
4328 /* find clientid in conf_id_hashtbl */
4329 clp
= find_confirmed_client(clid
);
4333 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4334 clp
->cl_name
.len
, clp
->cl_name
.data
,
4337 /* find clp->cl_name in reclaim_str_hashtbl */
4338 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4339 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4340 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4348 * Called from OPEN. Look for clientid in reclaim list.
4351 nfs4_check_open_reclaim(clientid_t
*clid
)
4353 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4356 /* initialization to perform at module load time: */
4359 nfs4_state_init(void)
4363 status
= nfsd4_init_slabs();
4366 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4367 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4368 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4369 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4370 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4371 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4373 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4374 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4375 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4376 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4378 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4379 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4381 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4382 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4384 memset(&onestateid
, ~0, sizeof(stateid_t
));
4385 INIT_LIST_HEAD(&close_lru
);
4386 INIT_LIST_HEAD(&client_lru
);
4387 INIT_LIST_HEAD(&del_recall_lru
);
4388 reclaim_str_hashtbl_size
= 0;
4393 nfsd4_load_reboot_recovery_data(void)
4398 nfsd4_init_recdir();
4399 status
= nfsd4_recdir_load();
4400 nfs4_unlock_state();
4402 printk("NFSD: Failure reading reboot recovery data\n");
4406 * Since the lifetime of a delegation isn't limited to that of an open, a
4407 * client may quite reasonably hang on to a delegation as long as it has
4408 * the inode cached. This becomes an obvious problem the first time a
4409 * client's inode cache approaches the size of the server's total memory.
4411 * For now we avoid this problem by imposing a hard limit on the number
4412 * of delegations, which varies according to the server's memory size.
4415 set_max_delegations(void)
4418 * Allow at most 4 delegations per megabyte of RAM. Quick
4419 * estimates suggest that in the worst case (where every delegation
4420 * is for a different inode), a delegation could take about 1.5K,
4421 * giving a worst case usage of about 6% of memory.
4423 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4426 /* initialization to perform when the nfsd service is started: */
4429 __nfs4_state_start(void)
4433 boot_time
= get_seconds();
4434 locks_start_grace(&nfsd4_manager
);
4435 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4437 ret
= set_callback_cred();
4440 laundry_wq
= create_singlethread_workqueue("nfsd4");
4441 if (laundry_wq
== NULL
)
4443 ret
= nfsd4_create_callback_queue();
4445 goto out_free_laundry
;
4446 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4447 set_max_delegations();
4450 destroy_workqueue(laundry_wq
);
4455 nfs4_state_start(void)
4457 nfsd4_load_reboot_recovery_data();
4458 return __nfs4_state_start();
4462 __nfs4_state_shutdown(void)
4465 struct nfs4_client
*clp
= NULL
;
4466 struct nfs4_delegation
*dp
= NULL
;
4467 struct list_head
*pos
, *next
, reaplist
;
4469 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4470 while (!list_empty(&conf_id_hashtbl
[i
])) {
4471 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4474 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4475 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4479 INIT_LIST_HEAD(&reaplist
);
4480 spin_lock(&recall_lock
);
4481 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4482 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4483 list_move(&dp
->dl_recall_lru
, &reaplist
);
4485 spin_unlock(&recall_lock
);
4486 list_for_each_safe(pos
, next
, &reaplist
) {
4487 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4488 list_del_init(&dp
->dl_recall_lru
);
4489 unhash_delegation(dp
);
4492 nfsd4_shutdown_recdir();
4496 nfs4_state_shutdown(void)
4498 cancel_delayed_work_sync(&laundromat_work
);
4499 destroy_workqueue(laundry_wq
);
4500 locks_end_grace(&nfsd4_manager
);
4502 nfs4_release_reclaim();
4503 __nfs4_state_shutdown();
4504 nfs4_unlock_state();
4505 nfsd4_destroy_callback_queue();