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/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
47 #include "current_stateid.h"
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
53 #define all_ones {{~0,~0},~0}
54 static const stateid_t one_stateid
= {
56 .si_opaque
= all_ones
,
58 static const stateid_t zero_stateid
= {
61 static const stateid_t currentstateid
= {
65 static u64 current_sessionid
= 1;
67 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
68 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
69 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
71 /* forward declarations */
72 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
76 /* Currently used for almost all code touching nfsv4 state: */
77 static DEFINE_MUTEX(client_mutex
);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(recall_lock
);
86 static struct kmem_cache
*openowner_slab
= NULL
;
87 static struct kmem_cache
*lockowner_slab
= NULL
;
88 static struct kmem_cache
*file_slab
= NULL
;
89 static struct kmem_cache
*stateid_slab
= NULL
;
90 static struct kmem_cache
*deleg_slab
= NULL
;
95 mutex_lock(&client_mutex
);
98 static void free_session(struct nfsd4_session
*);
100 void nfsd4_put_session(struct nfsd4_session
*ses
)
102 atomic_dec(&ses
->se_ref
);
105 static bool is_session_dead(struct nfsd4_session
*ses
)
107 return ses
->se_flags
& NFS4_SESSION_DEAD
;
110 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
)
112 if (atomic_read(&ses
->se_ref
))
113 return nfserr_jukebox
;
114 ses
->se_flags
|= NFS4_SESSION_DEAD
;
118 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
120 if (is_session_dead(ses
))
121 return nfserr_badsession
;
122 atomic_inc(&ses
->se_ref
);
127 nfs4_unlock_state(void)
129 mutex_unlock(&client_mutex
);
132 static bool is_client_expired(struct nfs4_client
*clp
)
134 return clp
->cl_time
== 0;
137 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
139 if (atomic_read(&clp
->cl_refcount
))
140 return nfserr_jukebox
;
145 static __be32
mark_client_expired(struct nfs4_client
*clp
)
147 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
150 spin_lock(&nn
->client_lock
);
151 ret
= mark_client_expired_locked(clp
);
152 spin_unlock(&nn
->client_lock
);
156 static __be32
get_client_locked(struct nfs4_client
*clp
)
158 if (is_client_expired(clp
))
159 return nfserr_expired
;
160 atomic_inc(&clp
->cl_refcount
);
164 /* must be called under the client_lock */
166 renew_client_locked(struct nfs4_client
*clp
)
168 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
170 if (is_client_expired(clp
)) {
172 printk("%s: client (clientid %08x/%08x) already expired\n",
174 clp
->cl_clientid
.cl_boot
,
175 clp
->cl_clientid
.cl_id
);
179 dprintk("renewing client (clientid %08x/%08x)\n",
180 clp
->cl_clientid
.cl_boot
,
181 clp
->cl_clientid
.cl_id
);
182 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
183 clp
->cl_time
= get_seconds();
187 renew_client(struct nfs4_client
*clp
)
189 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
191 spin_lock(&nn
->client_lock
);
192 renew_client_locked(clp
);
193 spin_unlock(&nn
->client_lock
);
196 static void put_client_renew_locked(struct nfs4_client
*clp
)
198 if (!atomic_dec_and_test(&clp
->cl_refcount
))
200 if (!is_client_expired(clp
))
201 renew_client_locked(clp
);
204 void put_client_renew(struct nfs4_client
*clp
)
206 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
208 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
210 if (!is_client_expired(clp
))
211 renew_client_locked(clp
);
212 spin_unlock(&nn
->client_lock
);
217 opaque_hashval(const void *ptr
, int nbytes
)
219 unsigned char *cptr
= (unsigned char *) ptr
;
229 static void nfsd4_free_file(struct nfs4_file
*f
)
231 kmem_cache_free(file_slab
, f
);
235 put_nfs4_file(struct nfs4_file
*fi
)
237 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
238 hlist_del(&fi
->fi_hash
);
239 spin_unlock(&recall_lock
);
246 get_nfs4_file(struct nfs4_file
*fi
)
248 atomic_inc(&fi
->fi_ref
);
251 static int num_delegations
;
252 unsigned long max_delegations
;
255 * Open owner state (share locks)
258 /* hash tables for lock and open owners */
259 #define OWNER_HASH_BITS 8
260 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
261 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
263 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
267 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
269 return ret
& OWNER_HASH_MASK
;
272 /* hash table for nfs4_file */
273 #define FILE_HASH_BITS 8
274 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
276 static unsigned int file_hashval(struct inode
*ino
)
278 /* XXX: why are we hashing on inode pointer, anyway? */
279 return hash_ptr(ino
, FILE_HASH_BITS
);
282 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
284 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
286 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
287 atomic_inc(&fp
->fi_access
[oflag
]);
290 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
292 if (oflag
== O_RDWR
) {
293 __nfs4_file_get_access(fp
, O_RDONLY
);
294 __nfs4_file_get_access(fp
, O_WRONLY
);
296 __nfs4_file_get_access(fp
, oflag
);
299 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
301 if (fp
->fi_fds
[oflag
]) {
302 fput(fp
->fi_fds
[oflag
]);
303 fp
->fi_fds
[oflag
] = NULL
;
307 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
309 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
310 nfs4_file_put_fd(fp
, oflag
);
311 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
312 nfs4_file_put_fd(fp
, O_RDWR
);
316 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
318 if (oflag
== O_RDWR
) {
319 __nfs4_file_put_access(fp
, O_RDONLY
);
320 __nfs4_file_put_access(fp
, O_WRONLY
);
322 __nfs4_file_put_access(fp
, oflag
);
325 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
328 struct idr
*stateids
= &cl
->cl_stateids
;
329 struct nfs4_stid
*stid
;
332 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
336 new_id
= idr_alloc_cyclic(stateids
, stid
, 0, 0, GFP_KERNEL
);
339 stid
->sc_client
= cl
;
341 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
342 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
343 /* Will be incremented before return to client: */
344 stid
->sc_stateid
.si_generation
= 0;
347 * It shouldn't be a problem to reuse an opaque stateid value.
348 * I don't think it is for 4.1. But with 4.0 I worry that, for
349 * example, a stray write retransmission could be accepted by
350 * the server when it should have been rejected. Therefore,
351 * adopt a trick from the sctp code to attempt to maximize the
352 * amount of time until an id is reused, by ensuring they always
353 * "increase" (mod INT_MAX):
357 kmem_cache_free(slab
, stid
);
361 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
363 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
366 static struct nfs4_delegation
*
367 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
369 struct nfs4_delegation
*dp
;
370 struct nfs4_file
*fp
= stp
->st_file
;
372 dprintk("NFSD alloc_init_deleg\n");
374 * Major work on the lease subsystem (for example, to support
375 * calbacks on stat) will be required before we can support
376 * write delegations properly.
378 if (type
!= NFS4_OPEN_DELEGATE_READ
)
380 if (fp
->fi_had_conflict
)
382 if (num_delegations
> max_delegations
)
384 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
387 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
389 * delegation seqid's are never incremented. The 4.1 special
390 * meaning of seqid 0 isn't meaningful, really, but let's avoid
391 * 0 anyway just for consistency and use 1:
393 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
395 INIT_LIST_HEAD(&dp
->dl_perfile
);
396 INIT_LIST_HEAD(&dp
->dl_perclnt
);
397 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
401 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
403 atomic_set(&dp
->dl_count
, 1);
404 nfsd4_init_callback(&dp
->dl_recall
);
408 static void remove_stid(struct nfs4_stid
*s
)
410 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
412 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
416 nfs4_put_delegation(struct nfs4_delegation
*dp
)
418 if (atomic_dec_and_test(&dp
->dl_count
)) {
419 kmem_cache_free(deleg_slab
, dp
);
424 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
426 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
427 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
429 fput(fp
->fi_deleg_file
);
430 fp
->fi_deleg_file
= NULL
;
434 static void unhash_stid(struct nfs4_stid
*s
)
439 /* Called under the state lock. */
441 unhash_delegation(struct nfs4_delegation
*dp
)
443 list_del_init(&dp
->dl_perclnt
);
444 spin_lock(&recall_lock
);
445 list_del_init(&dp
->dl_perfile
);
446 list_del_init(&dp
->dl_recall_lru
);
447 spin_unlock(&recall_lock
);
448 nfs4_put_deleg_lease(dp
->dl_file
);
449 put_nfs4_file(dp
->dl_file
);
455 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
457 list_del_init(&dp
->dl_recall_lru
);
458 remove_stid(&dp
->dl_stid
);
459 nfs4_put_delegation(dp
);
462 static void destroy_delegation(struct nfs4_delegation
*dp
)
464 unhash_delegation(dp
);
465 remove_stid(&dp
->dl_stid
);
466 nfs4_put_delegation(dp
);
469 static void revoke_delegation(struct nfs4_delegation
*dp
)
471 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
473 if (clp
->cl_minorversion
== 0)
474 destroy_delegation(dp
);
476 unhash_delegation(dp
);
477 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
478 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
486 static unsigned int clientid_hashval(u32 id
)
488 return id
& CLIENT_HASH_MASK
;
491 static unsigned int clientstr_hashval(const char *name
)
493 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
497 * We store the NONE, READ, WRITE, and BOTH bits separately in the
498 * st_{access,deny}_bmap field of the stateid, in order to track not
499 * only what share bits are currently in force, but also what
500 * combinations of share bits previous opens have used. This allows us
501 * to enforce the recommendation of rfc 3530 14.2.19 that the server
502 * return an error if the client attempt to downgrade to a combination
503 * of share bits not explicable by closing some of its previous opens.
505 * XXX: This enforcement is actually incomplete, since we don't keep
506 * track of access/deny bit combinations; so, e.g., we allow:
508 * OPEN allow read, deny write
509 * OPEN allow both, deny none
510 * DOWNGRADE allow read, deny none
512 * which we should reject.
515 bmap_to_share_mode(unsigned long bmap
) {
517 unsigned int access
= 0;
519 for (i
= 1; i
< 4; i
++) {
520 if (test_bit(i
, &bmap
))
527 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
528 unsigned int access
, deny
;
530 access
= bmap_to_share_mode(stp
->st_access_bmap
);
531 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
532 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
537 /* set share access for a given stateid */
539 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
541 __set_bit(access
, &stp
->st_access_bmap
);
544 /* clear share access for a given stateid */
546 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
548 __clear_bit(access
, &stp
->st_access_bmap
);
551 /* test whether a given stateid has access */
553 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
555 return test_bit(access
, &stp
->st_access_bmap
);
558 /* set share deny for a given stateid */
560 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
562 __set_bit(access
, &stp
->st_deny_bmap
);
565 /* clear share deny for a given stateid */
567 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
569 __clear_bit(access
, &stp
->st_deny_bmap
);
572 /* test whether a given stateid is denying specific access */
574 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
576 return test_bit(access
, &stp
->st_deny_bmap
);
579 static int nfs4_access_to_omode(u32 access
)
581 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
582 case NFS4_SHARE_ACCESS_READ
:
584 case NFS4_SHARE_ACCESS_WRITE
:
586 case NFS4_SHARE_ACCESS_BOTH
:
593 /* release all access and file references for a given stateid */
595 release_all_access(struct nfs4_ol_stateid
*stp
)
599 for (i
= 1; i
< 4; i
++) {
600 if (test_access(i
, stp
))
601 nfs4_file_put_access(stp
->st_file
,
602 nfs4_access_to_omode(i
));
603 clear_access(i
, stp
);
607 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
609 list_del(&stp
->st_perfile
);
610 list_del(&stp
->st_perstateowner
);
613 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
615 release_all_access(stp
);
616 put_nfs4_file(stp
->st_file
);
620 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
622 remove_stid(&stp
->st_stid
);
623 kmem_cache_free(stateid_slab
, stp
);
626 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
630 unhash_generic_stateid(stp
);
631 unhash_stid(&stp
->st_stid
);
632 file
= find_any_file(stp
->st_file
);
634 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
635 close_generic_stateid(stp
);
636 free_generic_stateid(stp
);
639 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
641 struct nfs4_ol_stateid
*stp
;
643 list_del(&lo
->lo_owner
.so_strhash
);
644 list_del(&lo
->lo_perstateid
);
645 list_del(&lo
->lo_owner_ino_hash
);
646 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
647 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
648 struct nfs4_ol_stateid
, st_perstateowner
);
649 release_lock_stateid(stp
);
653 static void release_lockowner(struct nfs4_lockowner
*lo
)
655 unhash_lockowner(lo
);
656 nfs4_free_lockowner(lo
);
660 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
662 struct nfs4_lockowner
*lo
;
664 while (!list_empty(&open_stp
->st_lockowners
)) {
665 lo
= list_entry(open_stp
->st_lockowners
.next
,
666 struct nfs4_lockowner
, lo_perstateid
);
667 release_lockowner(lo
);
671 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
673 unhash_generic_stateid(stp
);
674 release_stateid_lockowners(stp
);
675 close_generic_stateid(stp
);
678 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
680 unhash_open_stateid(stp
);
681 unhash_stid(&stp
->st_stid
);
682 free_generic_stateid(stp
);
685 static void unhash_openowner(struct nfs4_openowner
*oo
)
687 struct nfs4_ol_stateid
*stp
;
689 list_del(&oo
->oo_owner
.so_strhash
);
690 list_del(&oo
->oo_perclient
);
691 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
692 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
693 struct nfs4_ol_stateid
, st_perstateowner
);
694 release_open_stateid(stp
);
698 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
700 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
703 unhash_stid(&s
->st_stid
);
704 free_generic_stateid(s
);
705 oo
->oo_last_closed_stid
= NULL
;
709 static void release_openowner(struct nfs4_openowner
*oo
)
711 unhash_openowner(oo
);
712 list_del(&oo
->oo_close_lru
);
713 release_last_closed_stateid(oo
);
714 nfs4_free_openowner(oo
);
718 hash_sessionid(struct nfs4_sessionid
*sessionid
)
720 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
722 return sid
->sequence
% SESSION_HASH_SIZE
;
727 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
729 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
730 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
734 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
740 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
741 * won't be used for replay.
743 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
745 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
747 if (nfserr
== nfserr_replay_me
)
750 if (!seqid_mutating_err(ntohl(nfserr
))) {
751 cstate
->replay_owner
= NULL
;
756 if (so
->so_is_open_owner
)
757 release_last_closed_stateid(openowner(so
));
763 gen_sessionid(struct nfsd4_session
*ses
)
765 struct nfs4_client
*clp
= ses
->se_client
;
766 struct nfsd4_sessionid
*sid
;
768 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
769 sid
->clientid
= clp
->cl_clientid
;
770 sid
->sequence
= current_sessionid
++;
775 * The protocol defines ca_maxresponssize_cached to include the size of
776 * the rpc header, but all we need to cache is the data starting after
777 * the end of the initial SEQUENCE operation--the rest we regenerate
778 * each time. Therefore we can advertise a ca_maxresponssize_cached
779 * value that is the number of bytes in our cache plus a few additional
780 * bytes. In order to stay on the safe side, and not promise more than
781 * we can cache, those additional bytes must be the minimum possible: 24
782 * bytes of rpc header (xid through accept state, with AUTH_NULL
783 * verifier), 12 for the compound header (with zero-length tag), and 44
784 * for the SEQUENCE op response:
786 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
789 free_session_slots(struct nfsd4_session
*ses
)
793 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
794 kfree(ses
->se_slots
[i
]);
798 * We don't actually need to cache the rpc and session headers, so we
799 * can allocate a little less for each slot:
801 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
805 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
808 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
809 return size
+ sizeof(struct nfsd4_slot
);
813 * XXX: If we run out of reserved DRC memory we could (up to a point)
814 * re-negotiate active sessions and reduce their slot usage to make
815 * room for new connections. For now we just fail the create session.
817 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
819 u32 slotsize
= slot_bytes(ca
);
820 u32 num
= ca
->maxreqs
;
823 spin_lock(&nfsd_drc_lock
);
824 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
825 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
826 num
= min_t(int, num
, avail
/ slotsize
);
827 nfsd_drc_mem_used
+= num
* slotsize
;
828 spin_unlock(&nfsd_drc_lock
);
833 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
835 int slotsize
= slot_bytes(ca
);
837 spin_lock(&nfsd_drc_lock
);
838 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
839 spin_unlock(&nfsd_drc_lock
);
842 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*attrs
)
844 int numslots
= attrs
->maxreqs
;
845 int slotsize
= slot_bytes(attrs
);
846 struct nfsd4_session
*new;
849 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
850 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
851 mem
= numslots
* sizeof(struct nfsd4_slot
*);
853 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
856 /* allocate each struct nfsd4_slot and data cache in one piece */
857 for (i
= 0; i
< numslots
; i
++) {
858 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
859 if (!new->se_slots
[i
])
865 kfree(new->se_slots
[i
]);
870 static void free_conn(struct nfsd4_conn
*c
)
872 svc_xprt_put(c
->cn_xprt
);
876 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
878 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
879 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
881 spin_lock(&clp
->cl_lock
);
882 if (!list_empty(&c
->cn_persession
)) {
883 list_del(&c
->cn_persession
);
886 nfsd4_probe_callback(clp
);
887 spin_unlock(&clp
->cl_lock
);
890 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
892 struct nfsd4_conn
*conn
;
894 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
897 svc_xprt_get(rqstp
->rq_xprt
);
898 conn
->cn_xprt
= rqstp
->rq_xprt
;
899 conn
->cn_flags
= flags
;
900 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
904 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
906 conn
->cn_session
= ses
;
907 list_add(&conn
->cn_persession
, &ses
->se_conns
);
910 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
912 struct nfs4_client
*clp
= ses
->se_client
;
914 spin_lock(&clp
->cl_lock
);
915 __nfsd4_hash_conn(conn
, ses
);
916 spin_unlock(&clp
->cl_lock
);
919 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
921 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
922 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
925 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
929 nfsd4_hash_conn(conn
, ses
);
930 ret
= nfsd4_register_conn(conn
);
932 /* oops; xprt is already down: */
933 nfsd4_conn_lost(&conn
->cn_xpt_user
);
934 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
935 /* callback channel may be back up */
936 nfsd4_probe_callback(ses
->se_client
);
940 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
942 u32 dir
= NFS4_CDFC4_FORE
;
944 if (cses
->flags
& SESSION4_BACK_CHAN
)
945 dir
|= NFS4_CDFC4_BACK
;
946 return alloc_conn(rqstp
, dir
);
949 /* must be called under client_lock */
950 static void nfsd4_del_conns(struct nfsd4_session
*s
)
952 struct nfs4_client
*clp
= s
->se_client
;
953 struct nfsd4_conn
*c
;
955 spin_lock(&clp
->cl_lock
);
956 while (!list_empty(&s
->se_conns
)) {
957 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
958 list_del_init(&c
->cn_persession
);
959 spin_unlock(&clp
->cl_lock
);
961 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
964 spin_lock(&clp
->cl_lock
);
966 spin_unlock(&clp
->cl_lock
);
969 static void __free_session(struct nfsd4_session
*ses
)
971 free_session_slots(ses
);
975 static void free_session(struct nfsd4_session
*ses
)
977 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
979 lockdep_assert_held(&nn
->client_lock
);
980 nfsd4_del_conns(ses
);
981 nfsd4_put_drc_mem(&ses
->se_fchannel
);
985 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
988 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
990 new->se_client
= clp
;
993 INIT_LIST_HEAD(&new->se_conns
);
995 new->se_cb_seq_nr
= 1;
996 new->se_flags
= cses
->flags
;
997 new->se_cb_prog
= cses
->callback_prog
;
998 new->se_cb_sec
= cses
->cb_sec
;
999 atomic_set(&new->se_ref
, 0);
1000 idx
= hash_sessionid(&new->se_sessionid
);
1001 spin_lock(&nn
->client_lock
);
1002 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1003 spin_lock(&clp
->cl_lock
);
1004 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1005 spin_unlock(&clp
->cl_lock
);
1006 spin_unlock(&nn
->client_lock
);
1007 memcpy(&new->se_fchannel
, &cses
->fore_channel
,
1008 sizeof(struct nfsd4_channel_attrs
));
1009 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1010 struct sockaddr
*sa
= svc_addr(rqstp
);
1012 * This is a little silly; with sessions there's no real
1013 * use for the callback address. Use the peer address
1014 * as a reasonable default for now, but consider fixing
1015 * the rpc client not to require an address in the
1018 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1019 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1023 /* caller must hold client_lock */
1024 static struct nfsd4_session
*
1025 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1027 struct nfsd4_session
*elem
;
1029 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1031 dump_sessionid(__func__
, sessionid
);
1032 idx
= hash_sessionid(sessionid
);
1033 /* Search in the appropriate list */
1034 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1035 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1036 NFS4_MAX_SESSIONID_LEN
)) {
1041 dprintk("%s: session not found\n", __func__
);
1045 /* caller must hold client_lock */
1047 unhash_session(struct nfsd4_session
*ses
)
1049 list_del(&ses
->se_hash
);
1050 spin_lock(&ses
->se_client
->cl_lock
);
1051 list_del(&ses
->se_perclnt
);
1052 spin_unlock(&ses
->se_client
->cl_lock
);
1055 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1057 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1059 if (clid
->cl_boot
== nn
->boot_time
)
1061 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1062 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1067 * XXX Should we use a slab cache ?
1068 * This type of memory management is somewhat inefficient, but we use it
1069 * anyway since SETCLIENTID is not a common operation.
1071 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1073 struct nfs4_client
*clp
;
1075 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1078 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1079 if (clp
->cl_name
.data
== NULL
) {
1083 clp
->cl_name
.len
= name
.len
;
1088 free_client(struct nfs4_client
*clp
)
1090 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1092 lockdep_assert_held(&nn
->client_lock
);
1093 while (!list_empty(&clp
->cl_sessions
)) {
1094 struct nfsd4_session
*ses
;
1095 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1097 list_del(&ses
->se_perclnt
);
1098 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1101 free_svc_cred(&clp
->cl_cred
);
1102 kfree(clp
->cl_name
.data
);
1103 idr_destroy(&clp
->cl_stateids
);
1107 /* must be called under the client_lock */
1109 unhash_client_locked(struct nfs4_client
*clp
)
1111 struct nfsd4_session
*ses
;
1113 list_del(&clp
->cl_lru
);
1114 spin_lock(&clp
->cl_lock
);
1115 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1116 list_del_init(&ses
->se_hash
);
1117 spin_unlock(&clp
->cl_lock
);
1121 destroy_client(struct nfs4_client
*clp
)
1123 struct nfs4_openowner
*oo
;
1124 struct nfs4_delegation
*dp
;
1125 struct list_head reaplist
;
1126 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1128 INIT_LIST_HEAD(&reaplist
);
1129 spin_lock(&recall_lock
);
1130 while (!list_empty(&clp
->cl_delegations
)) {
1131 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1132 list_del_init(&dp
->dl_perclnt
);
1133 list_move(&dp
->dl_recall_lru
, &reaplist
);
1135 spin_unlock(&recall_lock
);
1136 while (!list_empty(&reaplist
)) {
1137 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1138 destroy_delegation(dp
);
1140 while (!list_empty(&clp
->cl_openowners
)) {
1141 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1142 release_openowner(oo
);
1144 nfsd4_shutdown_callback(clp
);
1145 if (clp
->cl_cb_conn
.cb_xprt
)
1146 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1147 list_del(&clp
->cl_idhash
);
1148 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1149 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1151 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1152 spin_lock(&nn
->client_lock
);
1153 unhash_client_locked(clp
);
1154 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1156 spin_unlock(&nn
->client_lock
);
1159 static void expire_client(struct nfs4_client
*clp
)
1161 nfsd4_client_record_remove(clp
);
1162 destroy_client(clp
);
1165 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1167 memcpy(target
->cl_verifier
.data
, source
->data
,
1168 sizeof(target
->cl_verifier
.data
));
1171 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1173 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1174 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1177 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1179 if (source
->cr_principal
) {
1180 target
->cr_principal
=
1181 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1182 if (target
->cr_principal
== NULL
)
1185 target
->cr_principal
= NULL
;
1186 target
->cr_flavor
= source
->cr_flavor
;
1187 target
->cr_uid
= source
->cr_uid
;
1188 target
->cr_gid
= source
->cr_gid
;
1189 target
->cr_group_info
= source
->cr_group_info
;
1190 get_group_info(target
->cr_group_info
);
1191 target
->cr_gss_mech
= source
->cr_gss_mech
;
1192 if (source
->cr_gss_mech
)
1193 gss_mech_get(source
->cr_gss_mech
);
1198 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1202 res
= o1
->len
- o2
->len
;
1205 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1208 static int same_name(const char *n1
, const char *n2
)
1210 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1214 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1216 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1220 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1222 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1225 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1229 if (g1
->ngroups
!= g2
->ngroups
)
1231 for (i
=0; i
<g1
->ngroups
; i
++)
1232 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1238 * RFC 3530 language requires clid_inuse be returned when the
1239 * "principal" associated with a requests differs from that previously
1240 * used. We use uid, gid's, and gss principal string as our best
1241 * approximation. We also don't want to allow non-gss use of a client
1242 * established using gss: in theory cr_principal should catch that
1243 * change, but in practice cr_principal can be null even in the gss case
1244 * since gssd doesn't always pass down a principal string.
1246 static bool is_gss_cred(struct svc_cred
*cr
)
1248 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1249 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1254 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1256 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1257 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1258 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1259 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1261 if (cr1
->cr_principal
== cr2
->cr_principal
)
1263 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1265 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1268 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1270 static u32 current_clientid
= 1;
1272 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1273 clp
->cl_clientid
.cl_id
= current_clientid
++;
1276 static void gen_confirm(struct nfs4_client
*clp
)
1281 verf
[0] = (__be32
)get_seconds();
1282 verf
[1] = (__be32
)i
++;
1283 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1286 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1288 struct nfs4_stid
*ret
;
1290 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1291 if (!ret
|| !ret
->sc_type
)
1296 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1298 struct nfs4_stid
*s
;
1300 s
= find_stateid(cl
, t
);
1303 if (typemask
& s
->sc_type
)
1308 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1309 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1311 struct nfs4_client
*clp
;
1312 struct sockaddr
*sa
= svc_addr(rqstp
);
1314 struct net
*net
= SVC_NET(rqstp
);
1315 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1317 clp
= alloc_client(name
);
1321 INIT_LIST_HEAD(&clp
->cl_sessions
);
1322 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1324 spin_lock(&nn
->client_lock
);
1326 spin_unlock(&nn
->client_lock
);
1329 idr_init(&clp
->cl_stateids
);
1330 atomic_set(&clp
->cl_refcount
, 0);
1331 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1332 INIT_LIST_HEAD(&clp
->cl_idhash
);
1333 INIT_LIST_HEAD(&clp
->cl_openowners
);
1334 INIT_LIST_HEAD(&clp
->cl_delegations
);
1335 INIT_LIST_HEAD(&clp
->cl_lru
);
1336 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1337 INIT_LIST_HEAD(&clp
->cl_revoked
);
1338 spin_lock_init(&clp
->cl_lock
);
1339 nfsd4_init_callback(&clp
->cl_cb_null
);
1340 clp
->cl_time
= get_seconds();
1341 clear_bit(0, &clp
->cl_cb_slot_busy
);
1342 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1343 copy_verf(clp
, verf
);
1344 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1346 clp
->cl_cb_session
= NULL
;
1352 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1354 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1355 struct nfs4_client
*clp
;
1358 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1361 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1362 new = &((*new)->rb_left
);
1364 new = &((*new)->rb_right
);
1367 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1368 rb_insert_color(&new_clp
->cl_namenode
, root
);
1371 static struct nfs4_client
*
1372 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1375 struct rb_node
*node
= root
->rb_node
;
1376 struct nfs4_client
*clp
;
1379 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1380 cmp
= compare_blob(&clp
->cl_name
, name
);
1382 node
= node
->rb_left
;
1384 node
= node
->rb_right
;
1392 add_to_unconfirmed(struct nfs4_client
*clp
)
1394 unsigned int idhashval
;
1395 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1397 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1398 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1399 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1400 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1405 move_to_confirmed(struct nfs4_client
*clp
)
1407 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1408 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1410 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1411 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1412 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1413 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1414 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1418 static struct nfs4_client
*
1419 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1421 struct nfs4_client
*clp
;
1422 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1424 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1425 if (same_clid(&clp
->cl_clientid
, clid
)) {
1426 if ((bool)clp
->cl_minorversion
!= sessions
)
1435 static struct nfs4_client
*
1436 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1438 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1440 return find_client_in_id_table(tbl
, clid
, sessions
);
1443 static struct nfs4_client
*
1444 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1446 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1448 return find_client_in_id_table(tbl
, clid
, sessions
);
1451 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1453 return clp
->cl_exchange_flags
!= 0;
1456 static struct nfs4_client
*
1457 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1459 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1462 static struct nfs4_client
*
1463 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1465 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1469 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1471 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1472 struct sockaddr
*sa
= svc_addr(rqstp
);
1473 u32 scopeid
= rpc_get_scope_id(sa
);
1474 unsigned short expected_family
;
1476 /* Currently, we only support tcp and tcp6 for the callback channel */
1477 if (se
->se_callback_netid_len
== 3 &&
1478 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1479 expected_family
= AF_INET
;
1480 else if (se
->se_callback_netid_len
== 4 &&
1481 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1482 expected_family
= AF_INET6
;
1486 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1487 se
->se_callback_addr_len
,
1488 (struct sockaddr
*)&conn
->cb_addr
,
1489 sizeof(conn
->cb_addr
));
1491 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1494 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1495 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1497 conn
->cb_prog
= se
->se_callback_prog
;
1498 conn
->cb_ident
= se
->se_callback_ident
;
1499 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1502 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1503 conn
->cb_addrlen
= 0;
1504 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1505 "will not receive delegations\n",
1506 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1512 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1515 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1517 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1520 dprintk("--> %s slot %p\n", __func__
, slot
);
1522 slot
->sl_opcnt
= resp
->opcnt
;
1523 slot
->sl_status
= resp
->cstate
.status
;
1525 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1526 if (nfsd4_not_cached(resp
)) {
1527 slot
->sl_datalen
= 0;
1530 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1531 base
= (char *)resp
->cstate
.datap
-
1532 (char *)resp
->xbuf
->head
[0].iov_base
;
1533 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1535 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1540 * Encode the replay sequence operation from the slot values.
1541 * If cachethis is FALSE encode the uncached rep error on the next
1542 * operation which sets resp->p and increments resp->opcnt for
1543 * nfs4svc_encode_compoundres.
1547 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1548 struct nfsd4_compoundres
*resp
)
1550 struct nfsd4_op
*op
;
1551 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1553 /* Encode the replayed sequence operation */
1554 op
= &args
->ops
[resp
->opcnt
- 1];
1555 nfsd4_encode_operation(resp
, op
);
1557 /* Return nfserr_retry_uncached_rep in next operation. */
1558 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1559 op
= &args
->ops
[resp
->opcnt
++];
1560 op
->status
= nfserr_retry_uncached_rep
;
1561 nfsd4_encode_operation(resp
, op
);
1567 * The sequence operation is not cached because we can use the slot and
1571 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1572 struct nfsd4_sequence
*seq
)
1574 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1577 dprintk("--> %s slot %p\n", __func__
, slot
);
1579 /* Either returns 0 or nfserr_retry_uncached */
1580 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1581 if (status
== nfserr_retry_uncached_rep
)
1584 /* The sequence operation has been encoded, cstate->datap set. */
1585 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1587 resp
->opcnt
= slot
->sl_opcnt
;
1588 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1589 status
= slot
->sl_status
;
1595 * Set the exchange_id flags returned by the server.
1598 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1600 /* pNFS is not supported */
1601 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1603 /* Referrals are supported, Migration is not. */
1604 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1606 /* set the wire flags to return to client. */
1607 clid
->flags
= new->cl_exchange_flags
;
1610 static bool client_has_state(struct nfs4_client
*clp
)
1613 * Note clp->cl_openowners check isn't quite right: there's no
1614 * need to count owners without stateid's.
1616 * Also note we should probably be using this in 4.0 case too.
1618 return !list_empty(&clp
->cl_openowners
)
1619 || !list_empty(&clp
->cl_delegations
)
1620 || !list_empty(&clp
->cl_sessions
);
1624 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1625 struct nfsd4_compound_state
*cstate
,
1626 struct nfsd4_exchange_id
*exid
)
1628 struct nfs4_client
*unconf
, *conf
, *new;
1630 char addr_str
[INET6_ADDRSTRLEN
];
1631 nfs4_verifier verf
= exid
->verifier
;
1632 struct sockaddr
*sa
= svc_addr(rqstp
);
1633 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1634 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1636 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1637 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1638 "ip_addr=%s flags %x, spa_how %d\n",
1639 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1640 addr_str
, exid
->flags
, exid
->spa_how
);
1642 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1643 return nfserr_inval
;
1645 /* Currently only support SP4_NONE */
1646 switch (exid
->spa_how
) {
1649 default: /* checked by xdr code */
1652 return nfserr_encr_alg_unsupp
;
1654 return nfserr_serverfault
; /* no excuse :-/ */
1657 /* Cases below refer to rfc 5661 section 18.35.4: */
1659 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1661 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1662 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1665 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1666 status
= nfserr_inval
;
1669 if (!creds_match
) { /* case 9 */
1670 status
= nfserr_perm
;
1673 if (!verfs_match
) { /* case 8 */
1674 status
= nfserr_not_same
;
1678 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1682 if (!creds_match
) { /* case 3 */
1683 if (client_has_state(conf
)) {
1684 status
= nfserr_clid_inuse
;
1687 expire_client(conf
);
1690 if (verfs_match
) { /* case 2 */
1691 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1695 /* case 5, client reboot */
1699 if (update
) { /* case 7 */
1700 status
= nfserr_noent
;
1704 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1705 if (unconf
) /* case 4, possible retry or client restart */
1706 expire_client(unconf
);
1708 /* case 1 (normal case) */
1710 new = create_client(exid
->clname
, rqstp
, &verf
);
1712 status
= nfserr_jukebox
;
1715 new->cl_minorversion
= cstate
->minorversion
;
1718 add_to_unconfirmed(new);
1720 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1721 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1723 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1724 nfsd4_set_ex_flags(new, exid
);
1726 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1727 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1731 nfs4_unlock_state();
1736 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1738 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1741 /* The slot is in use, and no response has been sent. */
1743 if (seqid
== slot_seqid
)
1744 return nfserr_jukebox
;
1746 return nfserr_seq_misordered
;
1748 /* Note unsigned 32-bit arithmetic handles wraparound: */
1749 if (likely(seqid
== slot_seqid
+ 1))
1751 if (seqid
== slot_seqid
)
1752 return nfserr_replay_cache
;
1753 return nfserr_seq_misordered
;
1757 * Cache the create session result into the create session single DRC
1758 * slot cache by saving the xdr structure. sl_seqid has been set.
1759 * Do this for solo or embedded create session operations.
1762 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1763 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1765 slot
->sl_status
= nfserr
;
1766 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1770 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1771 struct nfsd4_clid_slot
*slot
)
1773 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1774 return slot
->sl_status
;
1777 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1778 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1779 1 + /* MIN tag is length with zero, only length */ \
1780 3 + /* version, opcount, opcode */ \
1781 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1782 /* seqid, slotID, slotID, cache */ \
1783 4 ) * sizeof(__be32))
1785 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1786 2 + /* verifier: AUTH_NULL, length 0 */\
1788 1 + /* MIN tag is length with zero, only length */ \
1789 3 + /* opcount, opcode, opstatus*/ \
1790 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1791 /* seqid, slotID, slotID, slotID, status */ \
1792 5 ) * sizeof(__be32))
1794 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1796 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1798 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1799 return nfserr_toosmall
;
1800 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1801 return nfserr_toosmall
;
1802 ca
->headerpadsz
= 0;
1803 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1804 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1805 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1806 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1807 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1808 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1810 * Note decreasing slot size below client's request may make it
1811 * difficult for client to function correctly, whereas
1812 * decreasing the number of slots will (just?) affect
1813 * performance. When short on memory we therefore prefer to
1814 * decrease number of slots instead of their size. Clients that
1815 * request larger slots than they need will get poor results:
1817 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1819 return nfserr_jukebox
;
1824 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1826 ca
->headerpadsz
= 0;
1829 * These RPC_MAX_HEADER macros are overkill, especially since we
1830 * don't even do gss on the backchannel yet. But this is still
1831 * less than 1k. Tighten up this estimate in the unlikely event
1832 * it turns out to be a problem for some client:
1834 if (ca
->maxreq_sz
< NFS4_enc_cb_recall_sz
+ RPC_MAX_HEADER_WITH_AUTH
)
1835 return nfserr_toosmall
;
1836 if (ca
->maxresp_sz
< NFS4_dec_cb_recall_sz
+ RPC_MAX_REPHEADER_WITH_AUTH
)
1837 return nfserr_toosmall
;
1838 ca
->maxresp_cached
= 0;
1840 return nfserr_toosmall
;
1846 nfsd4_create_session(struct svc_rqst
*rqstp
,
1847 struct nfsd4_compound_state
*cstate
,
1848 struct nfsd4_create_session
*cr_ses
)
1850 struct sockaddr
*sa
= svc_addr(rqstp
);
1851 struct nfs4_client
*conf
, *unconf
;
1852 struct nfsd4_session
*new;
1853 struct nfsd4_conn
*conn
;
1854 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1856 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1858 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1859 return nfserr_inval
;
1860 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1863 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1866 status
= nfserr_jukebox
;
1867 new = alloc_session(&cr_ses
->fore_channel
);
1869 goto out_release_drc_mem
;
1870 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1872 goto out_free_session
;
1875 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1876 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1877 WARN_ON_ONCE(conf
&& unconf
);
1880 cs_slot
= &conf
->cl_cs_slot
;
1881 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1882 if (status
== nfserr_replay_cache
) {
1883 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1885 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1886 status
= nfserr_seq_misordered
;
1889 } else if (unconf
) {
1890 struct nfs4_client
*old
;
1891 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1892 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1893 status
= nfserr_clid_inuse
;
1896 cs_slot
= &unconf
->cl_cs_slot
;
1897 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1899 /* an unconfirmed replay returns misordered */
1900 status
= nfserr_seq_misordered
;
1903 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1905 status
= mark_client_expired(old
);
1910 move_to_confirmed(unconf
);
1913 status
= nfserr_stale_clientid
;
1918 * We do not support RDMA or persistent sessions
1920 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1921 cr_ses
->flags
&= ~SESSION4_RDMA
;
1923 init_session(rqstp
, new, conf
, cr_ses
);
1924 nfsd4_init_conn(rqstp
, conn
, new);
1926 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1927 NFS4_MAX_SESSIONID_LEN
);
1928 cs_slot
->sl_seqid
++;
1929 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1931 /* cache solo and embedded create sessions under the state lock */
1932 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1933 nfs4_unlock_state();
1936 nfs4_unlock_state();
1939 __free_session(new);
1940 out_release_drc_mem
:
1941 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
1945 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1948 case NFS4_CDFC4_FORE
:
1949 case NFS4_CDFC4_BACK
:
1951 case NFS4_CDFC4_FORE_OR_BOTH
:
1952 case NFS4_CDFC4_BACK_OR_BOTH
:
1953 *dir
= NFS4_CDFC4_BOTH
;
1956 return nfserr_inval
;
1959 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1961 struct nfsd4_session
*session
= cstate
->session
;
1962 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1964 spin_lock(&nn
->client_lock
);
1965 session
->se_cb_prog
= bc
->bc_cb_program
;
1966 session
->se_cb_sec
= bc
->bc_cb_sec
;
1967 spin_unlock(&nn
->client_lock
);
1969 nfsd4_probe_callback(session
->se_client
);
1974 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1975 struct nfsd4_compound_state
*cstate
,
1976 struct nfsd4_bind_conn_to_session
*bcts
)
1979 struct nfsd4_conn
*conn
;
1980 struct nfsd4_session
*session
;
1981 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1983 if (!nfsd4_last_compound_op(rqstp
))
1984 return nfserr_not_only_op
;
1986 spin_lock(&nn
->client_lock
);
1987 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1988 spin_unlock(&nn
->client_lock
);
1989 status
= nfserr_badsession
;
1992 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1995 conn
= alloc_conn(rqstp
, bcts
->dir
);
1996 status
= nfserr_jukebox
;
1999 nfsd4_init_conn(rqstp
, conn
, session
);
2002 nfs4_unlock_state();
2006 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2010 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2014 nfsd4_destroy_session(struct svc_rqst
*r
,
2015 struct nfsd4_compound_state
*cstate
,
2016 struct nfsd4_destroy_session
*sessionid
)
2018 struct nfsd4_session
*ses
;
2020 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2023 status
= nfserr_not_only_op
;
2024 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2025 if (!nfsd4_last_compound_op(r
))
2028 dump_sessionid(__func__
, &sessionid
->sessionid
);
2029 spin_lock(&nn
->client_lock
);
2030 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2031 status
= nfserr_badsession
;
2033 goto out_client_lock
;
2034 status
= mark_session_dead_locked(ses
);
2036 goto out_client_lock
;
2037 unhash_session(ses
);
2038 spin_unlock(&nn
->client_lock
);
2040 nfsd4_probe_callback_sync(ses
->se_client
);
2042 spin_lock(&nn
->client_lock
);
2046 spin_unlock(&nn
->client_lock
);
2048 nfs4_unlock_state();
2052 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2054 struct nfsd4_conn
*c
;
2056 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2057 if (c
->cn_xprt
== xpt
) {
2064 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2066 struct nfs4_client
*clp
= ses
->se_client
;
2067 struct nfsd4_conn
*c
;
2070 spin_lock(&clp
->cl_lock
);
2071 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2073 spin_unlock(&clp
->cl_lock
);
2077 __nfsd4_hash_conn(new, ses
);
2078 spin_unlock(&clp
->cl_lock
);
2079 ret
= nfsd4_register_conn(new);
2081 /* oops; xprt is already down: */
2082 nfsd4_conn_lost(&new->cn_xpt_user
);
2086 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2088 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2090 return args
->opcnt
> session
->se_fchannel
.maxops
;
2093 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2094 struct nfsd4_session
*session
)
2096 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2098 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2102 nfsd4_sequence(struct svc_rqst
*rqstp
,
2103 struct nfsd4_compound_state
*cstate
,
2104 struct nfsd4_sequence
*seq
)
2106 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2107 struct nfsd4_session
*session
;
2108 struct nfs4_client
*clp
;
2109 struct nfsd4_slot
*slot
;
2110 struct nfsd4_conn
*conn
;
2112 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2114 if (resp
->opcnt
!= 1)
2115 return nfserr_sequence_pos
;
2118 * Will be either used or freed by nfsd4_sequence_check_conn
2121 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2123 return nfserr_jukebox
;
2125 spin_lock(&nn
->client_lock
);
2126 status
= nfserr_badsession
;
2127 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2129 goto out_no_session
;
2130 clp
= session
->se_client
;
2131 status
= get_client_locked(clp
);
2133 goto out_no_session
;
2134 status
= nfsd4_get_session_locked(session
);
2136 goto out_put_client
;
2138 status
= nfserr_too_many_ops
;
2139 if (nfsd4_session_too_many_ops(rqstp
, session
))
2140 goto out_put_session
;
2142 status
= nfserr_req_too_big
;
2143 if (nfsd4_request_too_big(rqstp
, session
))
2144 goto out_put_session
;
2146 status
= nfserr_badslot
;
2147 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2148 goto out_put_session
;
2150 slot
= session
->se_slots
[seq
->slotid
];
2151 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2153 /* We do not negotiate the number of slots yet, so set the
2154 * maxslots to the session maxreqs which is used to encode
2155 * sr_highest_slotid and the sr_target_slot id to maxslots */
2156 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2158 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2159 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2160 if (status
== nfserr_replay_cache
) {
2161 status
= nfserr_seq_misordered
;
2162 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2163 goto out_put_session
;
2164 cstate
->slot
= slot
;
2165 cstate
->session
= session
;
2166 /* Return the cached reply status and set cstate->status
2167 * for nfsd4_proc_compound processing */
2168 status
= nfsd4_replay_cache_entry(resp
, seq
);
2169 cstate
->status
= nfserr_replay_cache
;
2173 goto out_put_session
;
2175 nfsd4_sequence_check_conn(conn
, session
);
2178 /* Success! bump slot seqid */
2179 slot
->sl_seqid
= seq
->seqid
;
2180 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2182 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2184 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2186 cstate
->slot
= slot
;
2187 cstate
->session
= session
;
2190 switch (clp
->cl_cb_state
) {
2192 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2194 case NFSD4_CB_FAULT
:
2195 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2198 seq
->status_flags
= 0;
2200 if (!list_empty(&clp
->cl_revoked
))
2201 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2204 spin_unlock(&nn
->client_lock
);
2207 nfsd4_put_session(session
);
2209 put_client_renew_locked(clp
);
2210 goto out_no_session
;
2214 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2216 struct nfs4_client
*conf
, *unconf
, *clp
;
2218 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2221 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2222 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2223 WARN_ON_ONCE(conf
&& unconf
);
2228 if (client_has_state(conf
)) {
2229 status
= nfserr_clientid_busy
;
2235 status
= nfserr_stale_clientid
;
2241 nfs4_unlock_state();
2246 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2250 if (rc
->rca_one_fs
) {
2251 if (!cstate
->current_fh
.fh_dentry
)
2252 return nfserr_nofilehandle
;
2254 * We don't take advantage of the rca_one_fs case.
2255 * That's OK, it's optional, we can safely ignore it.
2261 status
= nfserr_complete_already
;
2262 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2263 &cstate
->session
->se_client
->cl_flags
))
2266 status
= nfserr_stale_clientid
;
2267 if (is_client_expired(cstate
->session
->se_client
))
2269 * The following error isn't really legal.
2270 * But we only get here if the client just explicitly
2271 * destroyed the client. Surely it no longer cares what
2272 * error it gets back on an operation for the dead
2278 nfsd4_client_record_create(cstate
->session
->se_client
);
2280 nfs4_unlock_state();
2285 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2286 struct nfsd4_setclientid
*setclid
)
2288 struct xdr_netobj clname
= setclid
->se_name
;
2289 nfs4_verifier clverifier
= setclid
->se_verf
;
2290 struct nfs4_client
*conf
, *unconf
, *new;
2292 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2294 /* Cases below refer to rfc 3530 section 14.2.33: */
2296 conf
= find_confirmed_client_by_name(&clname
, nn
);
2299 status
= nfserr_clid_inuse
;
2300 if (clp_used_exchangeid(conf
))
2302 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2303 char addr_str
[INET6_ADDRSTRLEN
];
2304 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2306 dprintk("NFSD: setclientid: string in use by client "
2307 "at %s\n", addr_str
);
2311 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2313 expire_client(unconf
);
2314 status
= nfserr_jukebox
;
2315 new = create_client(clname
, rqstp
, &clverifier
);
2318 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2319 /* case 1: probable callback update */
2320 copy_clid(new, conf
);
2321 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2323 new->cl_minorversion
= 0;
2324 gen_callback(new, setclid
, rqstp
);
2325 add_to_unconfirmed(new);
2326 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2327 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2328 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2331 nfs4_unlock_state();
2337 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2338 struct nfsd4_compound_state
*cstate
,
2339 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2341 struct nfs4_client
*conf
, *unconf
;
2342 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2343 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2345 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2347 if (STALE_CLIENTID(clid
, nn
))
2348 return nfserr_stale_clientid
;
2351 conf
= find_confirmed_client(clid
, false, nn
);
2352 unconf
= find_unconfirmed_client(clid
, false, nn
);
2354 * We try hard to give out unique clientid's, so if we get an
2355 * attempt to confirm the same clientid with a different cred,
2356 * there's a bug somewhere. Let's charitably assume it's our
2359 status
= nfserr_serverfault
;
2360 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2362 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2364 /* cases below refer to rfc 3530 section 14.2.34: */
2365 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2366 if (conf
&& !unconf
) /* case 2: probable retransmit */
2368 else /* case 4: client hasn't noticed we rebooted yet? */
2369 status
= nfserr_stale_clientid
;
2373 if (conf
) { /* case 1: callback update */
2374 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2375 nfsd4_probe_callback(conf
);
2376 expire_client(unconf
);
2377 } else { /* case 3: normal case; new or rebooted client */
2378 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2380 status
= mark_client_expired(conf
);
2383 expire_client(conf
);
2385 move_to_confirmed(unconf
);
2386 nfsd4_probe_callback(unconf
);
2389 nfs4_unlock_state();
2393 static struct nfs4_file
*nfsd4_alloc_file(void)
2395 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2398 /* OPEN Share state helper functions */
2399 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2401 unsigned int hashval
= file_hashval(ino
);
2403 atomic_set(&fp
->fi_ref
, 1);
2404 INIT_LIST_HEAD(&fp
->fi_stateids
);
2405 INIT_LIST_HEAD(&fp
->fi_delegations
);
2406 fp
->fi_inode
= igrab(ino
);
2407 fp
->fi_had_conflict
= false;
2408 fp
->fi_lease
= NULL
;
2409 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2410 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2411 spin_lock(&recall_lock
);
2412 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2413 spin_unlock(&recall_lock
);
2417 nfsd4_free_slab(struct kmem_cache
**slab
)
2421 kmem_cache_destroy(*slab
);
2426 nfsd4_free_slabs(void)
2428 nfsd4_free_slab(&openowner_slab
);
2429 nfsd4_free_slab(&lockowner_slab
);
2430 nfsd4_free_slab(&file_slab
);
2431 nfsd4_free_slab(&stateid_slab
);
2432 nfsd4_free_slab(&deleg_slab
);
2436 nfsd4_init_slabs(void)
2438 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2439 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2440 if (openowner_slab
== NULL
)
2442 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2443 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2444 if (lockowner_slab
== NULL
)
2446 file_slab
= kmem_cache_create("nfsd4_files",
2447 sizeof(struct nfs4_file
), 0, 0, NULL
);
2448 if (file_slab
== NULL
)
2450 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2451 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2452 if (stateid_slab
== NULL
)
2454 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2455 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2456 if (deleg_slab
== NULL
)
2461 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2465 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2467 kfree(oo
->oo_owner
.so_owner
.data
);
2468 kmem_cache_free(openowner_slab
, oo
);
2471 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2473 kfree(lo
->lo_owner
.so_owner
.data
);
2474 kmem_cache_free(lockowner_slab
, lo
);
2477 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2479 rp
->rp_status
= nfserr_serverfault
;
2481 rp
->rp_buf
= rp
->rp_ibuf
;
2484 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2486 struct nfs4_stateowner
*sop
;
2488 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2492 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2493 if (!sop
->so_owner
.data
) {
2494 kmem_cache_free(slab
, sop
);
2497 sop
->so_owner
.len
= owner
->len
;
2499 INIT_LIST_HEAD(&sop
->so_stateids
);
2500 sop
->so_client
= clp
;
2501 init_nfs4_replay(&sop
->so_replay
);
2505 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2507 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2509 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2510 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2513 static struct nfs4_openowner
*
2514 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2515 struct nfs4_openowner
*oo
;
2517 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2520 oo
->oo_owner
.so_is_open_owner
= 1;
2521 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2522 oo
->oo_flags
= NFS4_OO_NEW
;
2524 oo
->oo_last_closed_stid
= NULL
;
2525 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2526 hash_openowner(oo
, clp
, strhashval
);
2530 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2531 struct nfs4_openowner
*oo
= open
->op_openowner
;
2533 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2534 INIT_LIST_HEAD(&stp
->st_lockowners
);
2535 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2536 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2537 stp
->st_stateowner
= &oo
->oo_owner
;
2540 stp
->st_access_bmap
= 0;
2541 stp
->st_deny_bmap
= 0;
2542 set_access(open
->op_share_access
, stp
);
2543 set_deny(open
->op_share_deny
, stp
);
2544 stp
->st_openstp
= NULL
;
2548 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2550 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2552 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2554 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2555 oo
->oo_time
= get_seconds();
2559 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2562 return (sop
->so_owner
.len
== owner
->len
) &&
2563 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2564 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2567 static struct nfs4_openowner
*
2568 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2569 bool sessions
, struct nfsd_net
*nn
)
2571 struct nfs4_stateowner
*so
;
2572 struct nfs4_openowner
*oo
;
2573 struct nfs4_client
*clp
;
2575 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2576 if (!so
->so_is_open_owner
)
2578 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2580 clp
= oo
->oo_owner
.so_client
;
2581 if ((bool)clp
->cl_minorversion
!= sessions
)
2583 renew_client(oo
->oo_owner
.so_client
);
2590 /* search file_hashtbl[] for file */
2591 static struct nfs4_file
*
2592 find_file(struct inode
*ino
)
2594 unsigned int hashval
= file_hashval(ino
);
2595 struct nfs4_file
*fp
;
2597 spin_lock(&recall_lock
);
2598 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2599 if (fp
->fi_inode
== ino
) {
2601 spin_unlock(&recall_lock
);
2605 spin_unlock(&recall_lock
);
2610 * Called to check deny when READ with all zero stateid or
2611 * WRITE with all zero or all one stateid
2614 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2616 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2617 struct nfs4_file
*fp
;
2618 struct nfs4_ol_stateid
*stp
;
2621 fp
= find_file(ino
);
2624 ret
= nfserr_locked
;
2625 /* Search for conflicting share reservations */
2626 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2627 if (test_deny(deny_type
, stp
) ||
2628 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2637 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2639 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2640 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2642 /* We're assuming the state code never drops its reference
2643 * without first removing the lease. Since we're in this lease
2644 * callback (and since the lease code is serialized by the kernel
2645 * lock) we know the server hasn't removed the lease yet, we know
2646 * it's safe to take a reference: */
2647 atomic_inc(&dp
->dl_count
);
2649 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2651 /* only place dl_time is set. protected by lock_flocks*/
2652 dp
->dl_time
= get_seconds();
2654 nfsd4_cb_recall(dp
);
2657 /* Called from break_lease() with lock_flocks() held. */
2658 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2660 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2661 struct nfs4_delegation
*dp
;
2664 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2667 if (fp
->fi_had_conflict
) {
2668 WARN(1, "duplicate break on %p\n", fp
);
2672 * We don't want the locks code to timeout the lease for us;
2673 * we'll remove it ourself if a delegation isn't returned
2676 fl
->fl_break_time
= 0;
2678 spin_lock(&recall_lock
);
2679 fp
->fi_had_conflict
= true;
2680 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2681 nfsd_break_one_deleg(dp
);
2682 spin_unlock(&recall_lock
);
2686 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2689 return lease_modify(onlist
, arg
);
2694 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2695 .lm_break
= nfsd_break_deleg_cb
,
2696 .lm_change
= nfsd_change_deleg_cb
,
2699 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2701 if (nfsd4_has_session(cstate
))
2703 if (seqid
== so
->so_seqid
- 1)
2704 return nfserr_replay_me
;
2705 if (seqid
== so
->so_seqid
)
2707 return nfserr_bad_seqid
;
2711 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2712 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2714 clientid_t
*clientid
= &open
->op_clientid
;
2715 struct nfs4_client
*clp
= NULL
;
2716 unsigned int strhashval
;
2717 struct nfs4_openowner
*oo
= NULL
;
2720 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2721 return nfserr_stale_clientid
;
2723 * In case we need it later, after we've already created the
2724 * file and don't want to risk a further failure:
2726 open
->op_file
= nfsd4_alloc_file();
2727 if (open
->op_file
== NULL
)
2728 return nfserr_jukebox
;
2730 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2731 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2732 open
->op_openowner
= oo
;
2734 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2737 return nfserr_expired
;
2740 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2741 /* Replace unconfirmed owners without checking for replay. */
2742 clp
= oo
->oo_owner
.so_client
;
2743 release_openowner(oo
);
2744 open
->op_openowner
= NULL
;
2747 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2750 clp
= oo
->oo_owner
.so_client
;
2753 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2755 return nfserr_jukebox
;
2756 open
->op_openowner
= oo
;
2758 open
->op_stp
= nfs4_alloc_stateid(clp
);
2760 return nfserr_jukebox
;
2764 static inline __be32
2765 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2767 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2768 return nfserr_openmode
;
2773 static int share_access_to_flags(u32 share_access
)
2775 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2778 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2780 struct nfs4_stid
*ret
;
2782 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2785 return delegstateid(ret
);
2788 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2790 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2791 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2795 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2796 struct nfs4_delegation
**dp
)
2799 __be32 status
= nfserr_bad_stateid
;
2801 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2804 flags
= share_access_to_flags(open
->op_share_access
);
2805 status
= nfs4_check_delegmode(*dp
, flags
);
2809 if (!nfsd4_is_deleg_cur(open
))
2813 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2818 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2820 struct nfs4_ol_stateid
*local
;
2821 struct nfs4_openowner
*oo
= open
->op_openowner
;
2823 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2824 /* ignore lock owners */
2825 if (local
->st_stateowner
->so_is_open_owner
== 0)
2827 /* remember if we have seen this open owner */
2828 if (local
->st_stateowner
== &oo
->oo_owner
)
2830 /* check for conflicting share reservations */
2831 if (!test_share(local
, open
))
2832 return nfserr_share_denied
;
2837 static inline int nfs4_access_to_access(u32 nfs4_access
)
2841 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2842 flags
|= NFSD_MAY_READ
;
2843 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2844 flags
|= NFSD_MAY_WRITE
;
2848 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2849 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2852 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2853 int access
= nfs4_access_to_access(open
->op_share_access
);
2855 if (!fp
->fi_fds
[oflag
]) {
2856 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2857 &fp
->fi_fds
[oflag
]);
2861 nfs4_file_get_access(fp
, oflag
);
2866 static inline __be32
2867 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2868 struct nfsd4_open
*open
)
2870 struct iattr iattr
= {
2871 .ia_valid
= ATTR_SIZE
,
2874 if (!open
->op_truncate
)
2876 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2877 return nfserr_inval
;
2878 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2882 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
)
2884 u32 op_share_access
= open
->op_share_access
;
2888 new_access
= !test_access(op_share_access
, stp
);
2890 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2894 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2897 int oflag
= nfs4_access_to_omode(op_share_access
);
2898 nfs4_file_put_access(fp
, oflag
);
2902 /* remember the open */
2903 set_access(op_share_access
, stp
);
2904 set_deny(open
->op_share_deny
, stp
);
2911 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2913 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2916 /* Should we give out recallable state?: */
2917 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2919 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2922 * In the sessions case, since we don't have to establish a
2923 * separate connection for callbacks, we assume it's OK
2924 * until we hear otherwise:
2926 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2929 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2931 struct file_lock
*fl
;
2933 fl
= locks_alloc_lock();
2936 locks_init_lock(fl
);
2937 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2938 fl
->fl_flags
= FL_LEASE
;
2939 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2940 fl
->fl_end
= OFFSET_MAX
;
2941 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2942 fl
->fl_pid
= current
->tgid
;
2946 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2948 struct nfs4_file
*fp
= dp
->dl_file
;
2949 struct file_lock
*fl
;
2952 fl
= nfs4_alloc_init_lease(dp
, flag
);
2955 fl
->fl_file
= find_readable_file(fp
);
2956 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2957 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2959 list_del_init(&dp
->dl_perclnt
);
2960 locks_free_lock(fl
);
2964 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2965 atomic_set(&fp
->fi_delegees
, 1);
2966 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2970 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2972 struct nfs4_file
*fp
= dp
->dl_file
;
2975 return nfs4_setlease(dp
, flag
);
2976 spin_lock(&recall_lock
);
2977 if (fp
->fi_had_conflict
) {
2978 spin_unlock(&recall_lock
);
2981 atomic_inc(&fp
->fi_delegees
);
2982 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2983 spin_unlock(&recall_lock
);
2984 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2988 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2990 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2991 if (status
== -EAGAIN
)
2992 open
->op_why_no_deleg
= WND4_CONTENTION
;
2994 open
->op_why_no_deleg
= WND4_RESOURCE
;
2995 switch (open
->op_deleg_want
) {
2996 case NFS4_SHARE_WANT_READ_DELEG
:
2997 case NFS4_SHARE_WANT_WRITE_DELEG
:
2998 case NFS4_SHARE_WANT_ANY_DELEG
:
3000 case NFS4_SHARE_WANT_CANCEL
:
3001 open
->op_why_no_deleg
= WND4_CANCELLED
;
3003 case NFS4_SHARE_WANT_NO_DELEG
:
3010 * Attempt to hand out a delegation.
3013 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3014 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3016 struct nfs4_delegation
*dp
;
3017 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3019 int status
= 0, flag
= 0;
3021 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3022 flag
= NFS4_OPEN_DELEGATE_NONE
;
3023 open
->op_recall
= 0;
3024 switch (open
->op_claim_type
) {
3025 case NFS4_OPEN_CLAIM_PREVIOUS
:
3027 open
->op_recall
= 1;
3028 flag
= open
->op_delegate_type
;
3029 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
3032 case NFS4_OPEN_CLAIM_NULL
:
3033 /* Let's not give out any delegations till everyone's
3034 * had the chance to reclaim theirs.... */
3035 if (locks_in_grace(net
))
3037 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3039 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3040 flag
= NFS4_OPEN_DELEGATE_WRITE
;
3042 flag
= NFS4_OPEN_DELEGATE_READ
;
3048 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
3051 status
= nfs4_set_delegation(dp
, flag
);
3055 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3057 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3058 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3060 open
->op_delegate_type
= flag
;
3061 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
3062 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3063 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
3064 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3066 /* 4.1 client asking for a delegation? */
3067 if (open
->op_deleg_want
)
3068 nfsd4_open_deleg_none_ext(open
, status
);
3072 unhash_stid(&dp
->dl_stid
);
3073 nfs4_put_delegation(dp
);
3075 flag
= NFS4_OPEN_DELEGATE_NONE
;
3079 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3080 struct nfs4_delegation
*dp
)
3082 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3083 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3084 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3085 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3086 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3087 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3088 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3089 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3091 /* Otherwise the client must be confused wanting a delegation
3092 * it already has, therefore we don't return
3093 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3098 * called with nfs4_lock_state() held.
3101 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3103 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3104 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3105 struct nfs4_file
*fp
= NULL
;
3106 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3107 struct nfs4_ol_stateid
*stp
= NULL
;
3108 struct nfs4_delegation
*dp
= NULL
;
3112 * Lookup file; if found, lookup stateid and check open request,
3113 * and check for delegations in the process of being recalled.
3114 * If not found, create the nfs4_file struct
3116 fp
= find_file(ino
);
3118 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3120 status
= nfs4_check_deleg(cl
, open
, &dp
);
3124 status
= nfserr_bad_stateid
;
3125 if (nfsd4_is_deleg_cur(open
))
3127 status
= nfserr_jukebox
;
3129 open
->op_file
= NULL
;
3130 nfsd4_init_file(fp
, ino
);
3134 * OPEN the file, or upgrade an existing OPEN.
3135 * If truncate fails, the OPEN fails.
3138 /* Stateid was found, this is an OPEN upgrade */
3139 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3143 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3146 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3150 open
->op_stp
= NULL
;
3151 init_open_stateid(stp
, fp
, open
);
3153 update_stateid(&stp
->st_stid
.sc_stateid
);
3154 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3156 if (nfsd4_has_session(&resp
->cstate
)) {
3157 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3159 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3160 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3161 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3167 * Attempt to hand out a delegation. No error return, because the
3168 * OPEN succeeds even if we fail.
3170 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3174 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3175 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3177 /* 4.1 client trying to upgrade/downgrade delegation? */
3178 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3179 open
->op_deleg_want
)
3180 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3184 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3185 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3187 * To finish the open response, we just need to set the rflags.
3189 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3190 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3191 !nfsd4_has_session(&resp
->cstate
))
3192 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3197 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3199 if (open
->op_openowner
) {
3200 struct nfs4_openowner
*oo
= open
->op_openowner
;
3202 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3203 list_del_init(&oo
->oo_close_lru
);
3204 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3206 release_openowner(oo
);
3207 open
->op_openowner
= NULL
;
3209 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3213 nfsd4_free_file(open
->op_file
);
3215 free_generic_stateid(open
->op_stp
);
3218 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3220 struct nfs4_client
*found
;
3222 if (STALE_CLIENTID(clid
, nn
))
3223 return nfserr_stale_clientid
;
3224 found
= find_confirmed_client(clid
, session
, nn
);
3227 return found
? nfs_ok
: nfserr_expired
;
3231 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3234 struct nfs4_client
*clp
;
3236 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3239 dprintk("process_renew(%08x/%08x): starting\n",
3240 clid
->cl_boot
, clid
->cl_id
);
3241 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3244 status
= nfserr_cb_path_down
;
3245 if (!list_empty(&clp
->cl_delegations
)
3246 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3250 nfs4_unlock_state();
3255 nfsd4_end_grace(struct nfsd_net
*nn
)
3257 /* do nothing if grace period already ended */
3258 if (nn
->grace_ended
)
3261 dprintk("NFSD: end of grace period\n");
3262 nn
->grace_ended
= true;
3263 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3264 locks_end_grace(&nn
->nfsd4_manager
);
3266 * Now that every NFSv4 client has had the chance to recover and
3267 * to see the (possibly new, possibly shorter) lease time, we
3268 * can safely set the next grace time to the current lease time:
3270 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3274 nfs4_laundromat(struct nfsd_net
*nn
)
3276 struct nfs4_client
*clp
;
3277 struct nfs4_openowner
*oo
;
3278 struct nfs4_delegation
*dp
;
3279 struct list_head
*pos
, *next
, reaplist
;
3280 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3281 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3282 time_t u
, test_val
= nn
->nfsd4_lease
;
3286 dprintk("NFSD: laundromat service - starting\n");
3287 nfsd4_end_grace(nn
);
3288 INIT_LIST_HEAD(&reaplist
);
3289 spin_lock(&nn
->client_lock
);
3290 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3291 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3292 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3293 t
= clp
->cl_time
- cutoff
;
3294 if (clientid_val
> t
)
3298 if (mark_client_expired_locked(clp
)) {
3299 dprintk("NFSD: client in use (clientid %08x)\n",
3300 clp
->cl_clientid
.cl_id
);
3303 list_move(&clp
->cl_lru
, &reaplist
);
3305 spin_unlock(&nn
->client_lock
);
3306 list_for_each_safe(pos
, next
, &reaplist
) {
3307 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3308 dprintk("NFSD: purging unused client (clientid %08x)\n",
3309 clp
->cl_clientid
.cl_id
);
3312 spin_lock(&recall_lock
);
3313 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3314 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3315 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3317 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3318 u
= dp
->dl_time
- cutoff
;
3323 list_move(&dp
->dl_recall_lru
, &reaplist
);
3325 spin_unlock(&recall_lock
);
3326 list_for_each_safe(pos
, next
, &reaplist
) {
3327 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3328 revoke_delegation(dp
);
3330 test_val
= nn
->nfsd4_lease
;
3331 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3332 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3333 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3334 u
= oo
->oo_time
- cutoff
;
3339 release_openowner(oo
);
3341 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3342 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3343 nfs4_unlock_state();
3344 return clientid_val
;
3347 static struct workqueue_struct
*laundry_wq
;
3348 static void laundromat_main(struct work_struct
*);
3351 laundromat_main(struct work_struct
*laundry
)
3354 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3356 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3359 t
= nfs4_laundromat(nn
);
3360 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3361 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3364 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3366 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3367 return nfserr_bad_stateid
;
3372 access_permit_read(struct nfs4_ol_stateid
*stp
)
3374 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3375 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3376 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3380 access_permit_write(struct nfs4_ol_stateid
*stp
)
3382 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3383 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3387 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3389 __be32 status
= nfserr_openmode
;
3391 /* For lock stateid's, we test the parent open, not the lock: */
3392 if (stp
->st_openstp
)
3393 stp
= stp
->st_openstp
;
3394 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3396 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3403 static inline __be32
3404 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3406 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3408 else if (locks_in_grace(net
)) {
3409 /* Answer in remaining cases depends on existence of
3410 * conflicting state; so we must wait out the grace period. */
3411 return nfserr_grace
;
3412 } else if (flags
& WR_STATE
)
3413 return nfs4_share_conflict(current_fh
,
3414 NFS4_SHARE_DENY_WRITE
);
3415 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3416 return nfs4_share_conflict(current_fh
,
3417 NFS4_SHARE_DENY_READ
);
3421 * Allow READ/WRITE during grace period on recovered state only for files
3422 * that are not able to provide mandatory locking.
3425 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3427 return locks_in_grace(net
) && mandatory_lock(inode
);
3430 /* Returns true iff a is later than b: */
3431 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3433 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3436 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3439 * When sessions are used the stateid generation number is ignored
3442 if (has_session
&& in
->si_generation
== 0)
3445 if (in
->si_generation
== ref
->si_generation
)
3448 /* If the client sends us a stateid from the future, it's buggy: */
3449 if (stateid_generation_after(in
, ref
))
3450 return nfserr_bad_stateid
;
3452 * However, we could see a stateid from the past, even from a
3453 * non-buggy client. For example, if the client sends a lock
3454 * while some IO is outstanding, the lock may bump si_generation
3455 * while the IO is still in flight. The client could avoid that
3456 * situation by waiting for responses on all the IO requests,
3457 * but better performance may result in retrying IO that
3458 * receives an old_stateid error if requests are rarely
3459 * reordered in flight:
3461 return nfserr_old_stateid
;
3464 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3466 struct nfs4_stid
*s
;
3467 struct nfs4_ol_stateid
*ols
;
3470 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3471 return nfserr_bad_stateid
;
3472 /* Client debugging aid. */
3473 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3474 char addr_str
[INET6_ADDRSTRLEN
];
3475 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3477 pr_warn_ratelimited("NFSD: client %s testing state ID "
3478 "with incorrect client ID\n", addr_str
);
3479 return nfserr_bad_stateid
;
3481 s
= find_stateid(cl
, stateid
);
3483 return nfserr_bad_stateid
;
3484 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3487 switch (s
->sc_type
) {
3488 case NFS4_DELEG_STID
:
3490 case NFS4_REVOKED_DELEG_STID
:
3491 return nfserr_deleg_revoked
;
3492 case NFS4_OPEN_STID
:
3493 case NFS4_LOCK_STID
:
3494 ols
= openlockstateid(s
);
3495 if (ols
->st_stateowner
->so_is_open_owner
3496 && !(openowner(ols
->st_stateowner
)->oo_flags
3497 & NFS4_OO_CONFIRMED
))
3498 return nfserr_bad_stateid
;
3501 printk("unknown stateid type %x\n", s
->sc_type
);
3502 case NFS4_CLOSED_STID
:
3503 return nfserr_bad_stateid
;
3507 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3508 struct nfs4_stid
**s
, bool sessions
,
3509 struct nfsd_net
*nn
)
3511 struct nfs4_client
*cl
;
3514 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3515 return nfserr_bad_stateid
;
3516 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3518 if (status
== nfserr_stale_clientid
)
3519 return nfserr_stale_stateid
;
3522 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3524 return nfserr_bad_stateid
;
3529 * Checks for stateid operations
3532 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3533 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3535 struct nfs4_stid
*s
;
3536 struct nfs4_ol_stateid
*stp
= NULL
;
3537 struct nfs4_delegation
*dp
= NULL
;
3538 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3539 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3540 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3546 if (grace_disallows_io(net
, ino
))
3547 return nfserr_grace
;
3549 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3550 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3552 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3553 &s
, cstate
->minorversion
, nn
);
3556 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3559 switch (s
->sc_type
) {
3560 case NFS4_DELEG_STID
:
3561 dp
= delegstateid(s
);
3562 status
= nfs4_check_delegmode(dp
, flags
);
3566 *filpp
= dp
->dl_file
->fi_deleg_file
;
3569 status
= nfserr_serverfault
;
3574 case NFS4_OPEN_STID
:
3575 case NFS4_LOCK_STID
:
3576 stp
= openlockstateid(s
);
3577 status
= nfs4_check_fh(current_fh
, stp
);
3580 if (stp
->st_stateowner
->so_is_open_owner
3581 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3583 status
= nfs4_check_openmode(stp
, flags
);
3587 if (flags
& RD_STATE
)
3588 *filpp
= find_readable_file(stp
->st_file
);
3590 *filpp
= find_writeable_file(stp
->st_file
);
3594 return nfserr_bad_stateid
;
3602 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3604 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3605 return nfserr_locks_held
;
3606 release_lock_stateid(stp
);
3611 * Test if the stateid is valid
3614 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3615 struct nfsd4_test_stateid
*test_stateid
)
3617 struct nfsd4_test_stateid_id
*stateid
;
3618 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3621 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3622 stateid
->ts_id_status
=
3623 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3624 nfs4_unlock_state();
3630 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3631 struct nfsd4_free_stateid
*free_stateid
)
3633 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3634 struct nfs4_stid
*s
;
3635 struct nfs4_delegation
*dp
;
3636 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3637 __be32 ret
= nfserr_bad_stateid
;
3640 s
= find_stateid(cl
, stateid
);
3643 switch (s
->sc_type
) {
3644 case NFS4_DELEG_STID
:
3645 ret
= nfserr_locks_held
;
3647 case NFS4_OPEN_STID
:
3648 case NFS4_LOCK_STID
:
3649 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3652 if (s
->sc_type
== NFS4_LOCK_STID
)
3653 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3655 ret
= nfserr_locks_held
;
3657 case NFS4_REVOKED_DELEG_STID
:
3658 dp
= delegstateid(s
);
3659 destroy_revoked_delegation(dp
);
3663 ret
= nfserr_bad_stateid
;
3666 nfs4_unlock_state();
3673 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3674 RD_STATE
: WR_STATE
;
3677 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3679 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3680 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3683 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3686 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3687 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3689 * "Closed" stateid's exist *only* to return
3690 * nfserr_replay_me from the previous step, and
3691 * revoked delegations are kept only for free_stateid.
3693 return nfserr_bad_stateid
;
3694 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3697 return nfs4_check_fh(current_fh
, stp
);
3701 * Checks for sequence id mutating operations.
3704 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3705 stateid_t
*stateid
, char typemask
,
3706 struct nfs4_ol_stateid
**stpp
,
3707 struct nfsd_net
*nn
)
3710 struct nfs4_stid
*s
;
3712 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3713 seqid
, STATEID_VAL(stateid
));
3716 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3717 cstate
->minorversion
, nn
);
3720 *stpp
= openlockstateid(s
);
3721 if (!nfsd4_has_session(cstate
))
3722 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3724 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3727 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3728 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3731 struct nfs4_openowner
*oo
;
3733 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3734 NFS4_OPEN_STID
, stpp
, nn
);
3737 oo
= openowner((*stpp
)->st_stateowner
);
3738 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3739 return nfserr_bad_stateid
;
3744 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3745 struct nfsd4_open_confirm
*oc
)
3748 struct nfs4_openowner
*oo
;
3749 struct nfs4_ol_stateid
*stp
;
3750 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3752 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3753 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3754 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3756 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3762 status
= nfs4_preprocess_seqid_op(cstate
,
3763 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3764 NFS4_OPEN_STID
, &stp
, nn
);
3767 oo
= openowner(stp
->st_stateowner
);
3768 status
= nfserr_bad_stateid
;
3769 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3771 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3772 update_stateid(&stp
->st_stid
.sc_stateid
);
3773 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3774 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3775 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3777 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3780 nfsd4_bump_seqid(cstate
, status
);
3781 if (!cstate
->replay_owner
)
3782 nfs4_unlock_state();
3786 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3788 if (!test_access(access
, stp
))
3790 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3791 clear_access(access
, stp
);
3794 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3796 switch (to_access
) {
3797 case NFS4_SHARE_ACCESS_READ
:
3798 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3799 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3801 case NFS4_SHARE_ACCESS_WRITE
:
3802 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3803 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3805 case NFS4_SHARE_ACCESS_BOTH
:
3813 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3816 for (i
= 0; i
< 4; i
++) {
3817 if ((i
& deny
) != i
)
3823 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3824 struct nfsd4_compound_state
*cstate
,
3825 struct nfsd4_open_downgrade
*od
)
3828 struct nfs4_ol_stateid
*stp
;
3829 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3831 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3832 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3833 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3835 /* We don't yet support WANT bits: */
3836 if (od
->od_deleg_want
)
3837 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3841 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3842 &od
->od_stateid
, &stp
, nn
);
3845 status
= nfserr_inval
;
3846 if (!test_access(od
->od_share_access
, stp
)) {
3847 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3848 stp
->st_access_bmap
, od
->od_share_access
);
3851 if (!test_deny(od
->od_share_deny
, stp
)) {
3852 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3853 stp
->st_deny_bmap
, od
->od_share_deny
);
3856 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3858 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3860 update_stateid(&stp
->st_stid
.sc_stateid
);
3861 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3864 nfsd4_bump_seqid(cstate
, status
);
3865 if (!cstate
->replay_owner
)
3866 nfs4_unlock_state();
3870 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3872 unhash_open_stateid(s
);
3873 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3877 * nfs4_unlock_state() called after encode
3880 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3881 struct nfsd4_close
*close
)
3884 struct nfs4_openowner
*oo
;
3885 struct nfs4_ol_stateid
*stp
;
3886 struct net
*net
= SVC_NET(rqstp
);
3887 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3889 dprintk("NFSD: nfsd4_close on file %.*s\n",
3890 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3891 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3894 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3896 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3898 nfsd4_bump_seqid(cstate
, status
);
3901 oo
= openowner(stp
->st_stateowner
);
3902 update_stateid(&stp
->st_stid
.sc_stateid
);
3903 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3905 nfsd4_close_open_stateid(stp
);
3907 if (cstate
->minorversion
) {
3908 unhash_stid(&stp
->st_stid
);
3909 free_generic_stateid(stp
);
3911 oo
->oo_last_closed_stid
= stp
;
3913 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3914 if (cstate
->minorversion
)
3915 release_openowner(oo
);
3918 * In the 4.0 case we need to keep the owners around a
3919 * little while to handle CLOSE replay.
3921 move_to_close_lru(oo
, SVC_NET(rqstp
));
3925 if (!cstate
->replay_owner
)
3926 nfs4_unlock_state();
3931 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3932 struct nfsd4_delegreturn
*dr
)
3934 struct nfs4_delegation
*dp
;
3935 stateid_t
*stateid
= &dr
->dr_stateid
;
3936 struct nfs4_stid
*s
;
3938 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3940 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3944 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3945 cstate
->minorversion
, nn
);
3948 dp
= delegstateid(s
);
3949 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3953 destroy_delegation(dp
);
3955 nfs4_unlock_state();
3961 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3963 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3966 end_offset(u64 start
, u64 len
)
3971 return end
>= start
? end
: NFS4_MAX_UINT64
;
3974 /* last octet in a range */
3976 last_byte_offset(u64 start
, u64 len
)
3982 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3985 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3987 return (file_hashval(inode
) + cl_id
3988 + opaque_hashval(ownername
->data
, ownername
->len
))
3989 & LOCKOWNER_INO_HASH_MASK
;
3993 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3994 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3995 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3996 * locking, this prevents us from being completely protocol-compliant. The
3997 * real solution to this problem is to start using unsigned file offsets in
3998 * the VFS, but this is a very deep change!
4001 nfs4_transform_lock_offset(struct file_lock
*lock
)
4003 if (lock
->fl_start
< 0)
4004 lock
->fl_start
= OFFSET_MAX
;
4005 if (lock
->fl_end
< 0)
4006 lock
->fl_end
= OFFSET_MAX
;
4009 /* Hack!: For now, we're defining this just so we can use a pointer to it
4010 * as a unique cookie to identify our (NFSv4's) posix locks. */
4011 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4015 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4017 struct nfs4_lockowner
*lo
;
4019 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4020 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4021 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4022 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4023 if (!deny
->ld_owner
.data
)
4024 /* We just don't care that much */
4026 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4027 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4030 deny
->ld_owner
.len
= 0;
4031 deny
->ld_owner
.data
= NULL
;
4032 deny
->ld_clientid
.cl_boot
= 0;
4033 deny
->ld_clientid
.cl_id
= 0;
4035 deny
->ld_start
= fl
->fl_start
;
4036 deny
->ld_length
= NFS4_MAX_UINT64
;
4037 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4038 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4039 deny
->ld_type
= NFS4_READ_LT
;
4040 if (fl
->fl_type
!= F_RDLCK
)
4041 deny
->ld_type
= NFS4_WRITE_LT
;
4044 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4046 struct nfs4_ol_stateid
*lst
;
4048 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4050 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4051 struct nfs4_ol_stateid
, st_perstateowner
);
4052 return lst
->st_file
->fi_inode
== inode
;
4055 static struct nfs4_lockowner
*
4056 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4057 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4059 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4060 struct nfs4_lockowner
*lo
;
4062 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4063 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4069 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4071 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4072 unsigned int inohash
= lockowner_ino_hashval(inode
,
4073 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4074 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4076 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4077 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4078 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4082 * Alloc a lock owner structure.
4083 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4086 * strhashval = ownerstr_hashval
4089 static struct nfs4_lockowner
*
4090 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4091 struct nfs4_lockowner
*lo
;
4093 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4096 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4097 lo
->lo_owner
.so_is_open_owner
= 0;
4098 /* It is the openowner seqid that will be incremented in encode in the
4099 * case of new lockowners; so increment the lock seqid manually: */
4100 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4101 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4105 static struct nfs4_ol_stateid
*
4106 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4108 struct nfs4_ol_stateid
*stp
;
4109 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4111 stp
= nfs4_alloc_stateid(clp
);
4114 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4115 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4116 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4117 stp
->st_stateowner
= &lo
->lo_owner
;
4120 stp
->st_access_bmap
= 0;
4121 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4122 stp
->st_openstp
= open_stp
;
4127 check_lock_length(u64 offset
, u64 length
)
4129 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4130 LOFF_OVERFLOW(offset
, length
)));
4133 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4135 struct nfs4_file
*fp
= lock_stp
->st_file
;
4136 int oflag
= nfs4_access_to_omode(access
);
4138 if (test_access(access
, lock_stp
))
4140 nfs4_file_get_access(fp
, oflag
);
4141 set_access(access
, lock_stp
);
4144 static __be32
lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
, struct nfs4_ol_stateid
*ost
, struct nfsd4_lock
*lock
, struct nfs4_ol_stateid
**lst
, bool *new)
4146 struct nfs4_file
*fi
= ost
->st_file
;
4147 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4148 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4149 struct nfs4_lockowner
*lo
;
4150 unsigned int strhashval
;
4151 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4153 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4154 &lock
->v
.new.owner
, nn
);
4156 if (!cstate
->minorversion
)
4157 return nfserr_bad_seqid
;
4158 /* XXX: a lockowner always has exactly one stateid: */
4159 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4160 struct nfs4_ol_stateid
, st_perstateowner
);
4163 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4164 &lock
->v
.new.owner
);
4165 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4167 return nfserr_jukebox
;
4168 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4170 release_lockowner(lo
);
4171 return nfserr_jukebox
;
4181 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4182 struct nfsd4_lock
*lock
)
4184 struct nfs4_openowner
*open_sop
= NULL
;
4185 struct nfs4_lockowner
*lock_sop
= NULL
;
4186 struct nfs4_ol_stateid
*lock_stp
;
4187 struct file
*filp
= NULL
;
4188 struct file_lock
*file_lock
= NULL
;
4189 struct file_lock
*conflock
= NULL
;
4191 bool new_state
= false;
4194 struct net
*net
= SVC_NET(rqstp
);
4195 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4197 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4198 (long long) lock
->lk_offset
,
4199 (long long) lock
->lk_length
);
4201 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4202 return nfserr_inval
;
4204 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4205 S_IFREG
, NFSD_MAY_LOCK
))) {
4206 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4212 if (lock
->lk_is_new
) {
4213 struct nfs4_ol_stateid
*open_stp
= NULL
;
4215 if (nfsd4_has_session(cstate
))
4216 /* See rfc 5661 18.10.3: given clientid is ignored: */
4217 memcpy(&lock
->v
.new.clientid
,
4218 &cstate
->session
->se_client
->cl_clientid
,
4219 sizeof(clientid_t
));
4221 status
= nfserr_stale_clientid
;
4222 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4225 /* validate and update open stateid and open seqid */
4226 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4227 lock
->lk_new_open_seqid
,
4228 &lock
->lk_new_open_stateid
,
4232 open_sop
= openowner(open_stp
->st_stateowner
);
4233 status
= nfserr_bad_stateid
;
4234 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4235 &lock
->v
.new.clientid
))
4237 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4238 &lock_stp
, &new_state
);
4240 status
= nfs4_preprocess_seqid_op(cstate
,
4241 lock
->lk_old_lock_seqid
,
4242 &lock
->lk_old_lock_stateid
,
4243 NFS4_LOCK_STID
, &lock_stp
, nn
);
4246 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4248 lkflg
= setlkflg(lock
->lk_type
);
4249 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4253 status
= nfserr_grace
;
4254 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4256 status
= nfserr_no_grace
;
4257 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4260 file_lock
= locks_alloc_lock();
4262 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4263 status
= nfserr_jukebox
;
4267 locks_init_lock(file_lock
);
4268 switch (lock
->lk_type
) {
4271 filp
= find_readable_file(lock_stp
->st_file
);
4273 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4274 file_lock
->fl_type
= F_RDLCK
;
4277 case NFS4_WRITEW_LT
:
4278 filp
= find_writeable_file(lock_stp
->st_file
);
4280 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4281 file_lock
->fl_type
= F_WRLCK
;
4284 status
= nfserr_inval
;
4288 status
= nfserr_openmode
;
4291 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4292 file_lock
->fl_pid
= current
->tgid
;
4293 file_lock
->fl_file
= filp
;
4294 file_lock
->fl_flags
= FL_POSIX
;
4295 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4296 file_lock
->fl_start
= lock
->lk_offset
;
4297 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4298 nfs4_transform_lock_offset(file_lock
);
4300 conflock
= locks_alloc_lock();
4302 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4303 status
= nfserr_jukebox
;
4307 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4309 case 0: /* success! */
4310 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4311 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4315 case (EAGAIN
): /* conflock holds conflicting lock */
4316 status
= nfserr_denied
;
4317 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4318 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4321 status
= nfserr_deadlock
;
4324 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4325 status
= nfserrno(err
);
4329 if (status
&& new_state
)
4330 release_lockowner(lock_sop
);
4331 nfsd4_bump_seqid(cstate
, status
);
4332 if (!cstate
->replay_owner
)
4333 nfs4_unlock_state();
4335 locks_free_lock(file_lock
);
4337 locks_free_lock(conflock
);
4342 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4343 * so we do a temporary open here just to get an open file to pass to
4344 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4347 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4350 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4352 err
= nfserrno(vfs_test_lock(file
, lock
));
4362 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4363 struct nfsd4_lockt
*lockt
)
4365 struct inode
*inode
;
4366 struct file_lock
*file_lock
= NULL
;
4367 struct nfs4_lockowner
*lo
;
4369 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4371 if (locks_in_grace(SVC_NET(rqstp
)))
4372 return nfserr_grace
;
4374 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4375 return nfserr_inval
;
4379 if (!nfsd4_has_session(cstate
)) {
4380 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4385 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4388 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4389 file_lock
= locks_alloc_lock();
4391 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4392 status
= nfserr_jukebox
;
4395 locks_init_lock(file_lock
);
4396 switch (lockt
->lt_type
) {
4399 file_lock
->fl_type
= F_RDLCK
;
4402 case NFS4_WRITEW_LT
:
4403 file_lock
->fl_type
= F_WRLCK
;
4406 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4407 status
= nfserr_inval
;
4411 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4413 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4414 file_lock
->fl_pid
= current
->tgid
;
4415 file_lock
->fl_flags
= FL_POSIX
;
4417 file_lock
->fl_start
= lockt
->lt_offset
;
4418 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4420 nfs4_transform_lock_offset(file_lock
);
4422 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4426 if (file_lock
->fl_type
!= F_UNLCK
) {
4427 status
= nfserr_denied
;
4428 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4431 nfs4_unlock_state();
4433 locks_free_lock(file_lock
);
4438 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4439 struct nfsd4_locku
*locku
)
4441 struct nfs4_lockowner
*lo
;
4442 struct nfs4_ol_stateid
*stp
;
4443 struct file
*filp
= NULL
;
4444 struct file_lock
*file_lock
= NULL
;
4447 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4449 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4450 (long long) locku
->lu_offset
,
4451 (long long) locku
->lu_length
);
4453 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4454 return nfserr_inval
;
4458 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4459 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4463 filp
= find_any_file(stp
->st_file
);
4465 status
= nfserr_lock_range
;
4468 file_lock
= locks_alloc_lock();
4470 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4471 status
= nfserr_jukebox
;
4474 lo
= lockowner(stp
->st_stateowner
);
4475 locks_init_lock(file_lock
);
4476 file_lock
->fl_type
= F_UNLCK
;
4477 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4478 file_lock
->fl_pid
= current
->tgid
;
4479 file_lock
->fl_file
= filp
;
4480 file_lock
->fl_flags
= FL_POSIX
;
4481 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4482 file_lock
->fl_start
= locku
->lu_offset
;
4484 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4486 nfs4_transform_lock_offset(file_lock
);
4488 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4490 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4493 update_stateid(&stp
->st_stid
.sc_stateid
);
4494 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4496 if (nfsd4_has_session(cstate
) && !check_for_locks(stp
->st_file
, lo
)) {
4497 WARN_ON_ONCE(cstate
->replay_owner
);
4498 release_lockowner(lo
);
4502 nfsd4_bump_seqid(cstate
, status
);
4503 if (!cstate
->replay_owner
)
4504 nfs4_unlock_state();
4506 locks_free_lock(file_lock
);
4510 status
= nfserrno(err
);
4516 * 1: locks held by lockowner
4517 * 0: no locks held by lockowner
4520 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4522 struct file_lock
**flpp
;
4523 struct inode
*inode
= filp
->fi_inode
;
4527 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4528 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4539 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4540 struct nfsd4_compound_state
*cstate
,
4541 struct nfsd4_release_lockowner
*rlockowner
)
4543 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4544 struct nfs4_stateowner
*sop
;
4545 struct nfs4_lockowner
*lo
;
4546 struct nfs4_ol_stateid
*stp
;
4547 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4548 struct list_head matches
;
4549 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4551 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4553 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4554 clid
->cl_boot
, clid
->cl_id
);
4558 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4562 status
= nfserr_locks_held
;
4563 INIT_LIST_HEAD(&matches
);
4565 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4566 if (sop
->so_is_open_owner
)
4568 if (!same_owner_str(sop
, owner
, clid
))
4570 list_for_each_entry(stp
, &sop
->so_stateids
,
4572 lo
= lockowner(sop
);
4573 if (check_for_locks(stp
->st_file
, lo
))
4575 list_add(&lo
->lo_list
, &matches
);
4578 /* Clients probably won't expect us to return with some (but not all)
4579 * of the lockowner state released; so don't release any until all
4580 * have been checked. */
4582 while (!list_empty(&matches
)) {
4583 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4585 /* unhash_stateowner deletes so_perclient only
4586 * for openowners. */
4587 list_del(&lo
->lo_list
);
4588 release_lockowner(lo
);
4591 nfs4_unlock_state();
4595 static inline struct nfs4_client_reclaim
*
4598 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4602 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4604 struct nfs4_client_reclaim
*crp
;
4606 crp
= nfsd4_find_reclaim_client(name
, nn
);
4607 return (crp
&& crp
->cr_clp
);
4611 * failure => all reset bets are off, nfserr_no_grace...
4613 struct nfs4_client_reclaim
*
4614 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4616 unsigned int strhashval
;
4617 struct nfs4_client_reclaim
*crp
;
4619 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4620 crp
= alloc_reclaim();
4622 strhashval
= clientstr_hashval(name
);
4623 INIT_LIST_HEAD(&crp
->cr_strhash
);
4624 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4625 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4627 nn
->reclaim_str_hashtbl_size
++;
4633 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4635 list_del(&crp
->cr_strhash
);
4637 nn
->reclaim_str_hashtbl_size
--;
4641 nfs4_release_reclaim(struct nfsd_net
*nn
)
4643 struct nfs4_client_reclaim
*crp
= NULL
;
4646 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4647 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4648 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4649 struct nfs4_client_reclaim
, cr_strhash
);
4650 nfs4_remove_reclaim_record(crp
, nn
);
4653 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4657 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4658 struct nfs4_client_reclaim
*
4659 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4661 unsigned int strhashval
;
4662 struct nfs4_client_reclaim
*crp
= NULL
;
4664 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4666 strhashval
= clientstr_hashval(recdir
);
4667 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4668 if (same_name(crp
->cr_recdir
, recdir
)) {
4676 * Called from OPEN. Look for clientid in reclaim list.
4679 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4681 struct nfs4_client
*clp
;
4683 /* find clientid in conf_id_hashtbl */
4684 clp
= find_confirmed_client(clid
, sessions
, nn
);
4686 return nfserr_reclaim_bad
;
4688 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4691 #ifdef CONFIG_NFSD_FAULT_INJECTION
4693 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4695 if (mark_client_expired(clp
))
4701 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4703 char buf
[INET6_ADDRSTRLEN
];
4704 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4705 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4709 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4712 char buf
[INET6_ADDRSTRLEN
];
4713 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4714 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4717 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4719 struct nfs4_openowner
*oop
;
4720 struct nfs4_lockowner
*lop
, *lo_next
;
4721 struct nfs4_ol_stateid
*stp
, *st_next
;
4724 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4725 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4726 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4738 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4740 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4743 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4745 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4746 nfsd_print_count(clp
, count
, "locked files");
4750 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4752 struct nfs4_openowner
*oop
, *next
;
4755 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4765 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4767 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4770 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4772 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4773 nfsd_print_count(clp
, count
, "open files");
4777 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4778 struct list_head
*victims
)
4780 struct nfs4_delegation
*dp
, *next
;
4783 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4785 list_move(&dp
->dl_recall_lru
, victims
);
4792 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4794 struct nfs4_delegation
*dp
, *next
;
4798 spin_lock(&recall_lock
);
4799 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4800 spin_unlock(&recall_lock
);
4802 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4803 revoke_delegation(dp
);
4808 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4810 struct nfs4_delegation
*dp
, *next
;
4814 spin_lock(&recall_lock
);
4815 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4816 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4817 nfsd_break_one_deleg(dp
);
4818 spin_unlock(&recall_lock
);
4823 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4827 spin_lock(&recall_lock
);
4828 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4829 spin_unlock(&recall_lock
);
4831 nfsd_print_count(clp
, count
, "delegations");
4835 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4837 struct nfs4_client
*clp
, *next
;
4839 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4841 if (!nfsd_netns_ready(nn
))
4844 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4845 count
+= func(clp
, max
- count
);
4846 if ((max
!= 0) && (count
>= max
))
4853 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4855 struct nfs4_client
*clp
;
4856 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4858 if (!nfsd_netns_ready(nn
))
4861 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4862 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4868 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4870 /* initialization to perform at module load time: */
4873 nfs4_state_init(void)
4878 * Since the lifetime of a delegation isn't limited to that of an open, a
4879 * client may quite reasonably hang on to a delegation as long as it has
4880 * the inode cached. This becomes an obvious problem the first time a
4881 * client's inode cache approaches the size of the server's total memory.
4883 * For now we avoid this problem by imposing a hard limit on the number
4884 * of delegations, which varies according to the server's memory size.
4887 set_max_delegations(void)
4890 * Allow at most 4 delegations per megabyte of RAM. Quick
4891 * estimates suggest that in the worst case (where every delegation
4892 * is for a different inode), a delegation could take about 1.5K,
4893 * giving a worst case usage of about 6% of memory.
4895 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4898 static int nfs4_state_create_net(struct net
*net
)
4900 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4903 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4904 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4905 if (!nn
->conf_id_hashtbl
)
4907 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4908 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4909 if (!nn
->unconf_id_hashtbl
)
4911 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4912 OWNER_HASH_SIZE
, GFP_KERNEL
);
4913 if (!nn
->ownerstr_hashtbl
)
4915 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4916 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4917 if (!nn
->lockowner_ino_hashtbl
)
4918 goto err_lockowner_ino
;
4919 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4920 SESSION_HASH_SIZE
, GFP_KERNEL
);
4921 if (!nn
->sessionid_hashtbl
)
4924 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4925 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4926 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4928 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4929 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4930 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4931 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4932 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4933 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4934 nn
->conf_name_tree
= RB_ROOT
;
4935 nn
->unconf_name_tree
= RB_ROOT
;
4936 INIT_LIST_HEAD(&nn
->client_lru
);
4937 INIT_LIST_HEAD(&nn
->close_lru
);
4938 INIT_LIST_HEAD(&nn
->del_recall_lru
);
4939 spin_lock_init(&nn
->client_lock
);
4941 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4947 kfree(nn
->lockowner_ino_hashtbl
);
4949 kfree(nn
->ownerstr_hashtbl
);
4951 kfree(nn
->unconf_id_hashtbl
);
4953 kfree(nn
->conf_id_hashtbl
);
4959 nfs4_state_destroy_net(struct net
*net
)
4962 struct nfs4_client
*clp
= NULL
;
4963 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4964 struct rb_node
*node
, *tmp
;
4966 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4967 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4968 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4969 destroy_client(clp
);
4973 node
= rb_first(&nn
->unconf_name_tree
);
4974 while (node
!= NULL
) {
4976 node
= rb_next(tmp
);
4977 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4978 rb_erase(tmp
, &nn
->unconf_name_tree
);
4979 destroy_client(clp
);
4982 kfree(nn
->sessionid_hashtbl
);
4983 kfree(nn
->lockowner_ino_hashtbl
);
4984 kfree(nn
->ownerstr_hashtbl
);
4985 kfree(nn
->unconf_id_hashtbl
);
4986 kfree(nn
->conf_id_hashtbl
);
4991 nfs4_state_start_net(struct net
*net
)
4993 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4996 ret
= nfs4_state_create_net(net
);
4999 nfsd4_client_tracking_init(net
);
5000 nn
->boot_time
= get_seconds();
5001 locks_start_grace(net
, &nn
->nfsd4_manager
);
5002 nn
->grace_ended
= false;
5003 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5004 nn
->nfsd4_grace
, net
);
5005 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5009 /* initialization to perform when the nfsd service is started: */
5012 nfs4_state_start(void)
5016 ret
= set_callback_cred();
5019 laundry_wq
= create_singlethread_workqueue("nfsd4");
5020 if (laundry_wq
== NULL
) {
5024 ret
= nfsd4_create_callback_queue();
5026 goto out_free_laundry
;
5028 set_max_delegations();
5033 destroy_workqueue(laundry_wq
);
5038 /* should be called with the state lock held */
5040 nfs4_state_shutdown_net(struct net
*net
)
5042 struct nfs4_delegation
*dp
= NULL
;
5043 struct list_head
*pos
, *next
, reaplist
;
5044 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5046 cancel_delayed_work_sync(&nn
->laundromat_work
);
5047 locks_end_grace(&nn
->nfsd4_manager
);
5049 INIT_LIST_HEAD(&reaplist
);
5050 spin_lock(&recall_lock
);
5051 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5052 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5053 list_move(&dp
->dl_recall_lru
, &reaplist
);
5055 spin_unlock(&recall_lock
);
5056 list_for_each_safe(pos
, next
, &reaplist
) {
5057 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5058 destroy_delegation(dp
);
5061 nfsd4_client_tracking_exit(net
);
5062 nfs4_state_destroy_net(net
);
5066 nfs4_state_shutdown(void)
5068 destroy_workqueue(laundry_wq
);
5069 nfsd4_destroy_callback_queue();
5073 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5075 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5076 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5080 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5082 if (cstate
->minorversion
) {
5083 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5084 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5089 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5091 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5095 * functions to set current state id
5098 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5100 put_stateid(cstate
, &odp
->od_stateid
);
5104 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5106 put_stateid(cstate
, &open
->op_stateid
);
5110 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5112 put_stateid(cstate
, &close
->cl_stateid
);
5116 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5118 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5122 * functions to consume current state id
5126 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5128 get_stateid(cstate
, &odp
->od_stateid
);
5132 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5134 get_stateid(cstate
, &drp
->dr_stateid
);
5138 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5140 get_stateid(cstate
, &fsp
->fr_stateid
);
5144 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5146 get_stateid(cstate
, &setattr
->sa_stateid
);
5150 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5152 get_stateid(cstate
, &close
->cl_stateid
);
5156 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5158 get_stateid(cstate
, &locku
->lu_stateid
);
5162 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5164 get_stateid(cstate
, &read
->rd_stateid
);
5168 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5170 get_stateid(cstate
, &write
->wr_stateid
);