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 bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1270 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1273 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1274 return service
== RPC_GSS_SVC_INTEGRITY
||
1275 service
== RPC_GSS_SVC_PRIVACY
;
1278 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1280 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1282 if (!cl
->cl_mach_cred
)
1284 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1286 if (!svc_rqst_integrity_protected(rqstp
))
1288 if (!cr
->cr_principal
)
1290 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1293 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1295 static u32 current_clientid
= 1;
1297 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1298 clp
->cl_clientid
.cl_id
= current_clientid
++;
1301 static void gen_confirm(struct nfs4_client
*clp
)
1306 verf
[0] = (__be32
)get_seconds();
1307 verf
[1] = (__be32
)i
++;
1308 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1311 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1313 struct nfs4_stid
*ret
;
1315 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1316 if (!ret
|| !ret
->sc_type
)
1321 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1323 struct nfs4_stid
*s
;
1325 s
= find_stateid(cl
, t
);
1328 if (typemask
& s
->sc_type
)
1333 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1334 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1336 struct nfs4_client
*clp
;
1337 struct sockaddr
*sa
= svc_addr(rqstp
);
1339 struct net
*net
= SVC_NET(rqstp
);
1340 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1342 clp
= alloc_client(name
);
1346 INIT_LIST_HEAD(&clp
->cl_sessions
);
1347 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1349 spin_lock(&nn
->client_lock
);
1351 spin_unlock(&nn
->client_lock
);
1354 idr_init(&clp
->cl_stateids
);
1355 atomic_set(&clp
->cl_refcount
, 0);
1356 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1357 INIT_LIST_HEAD(&clp
->cl_idhash
);
1358 INIT_LIST_HEAD(&clp
->cl_openowners
);
1359 INIT_LIST_HEAD(&clp
->cl_delegations
);
1360 INIT_LIST_HEAD(&clp
->cl_lru
);
1361 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1362 INIT_LIST_HEAD(&clp
->cl_revoked
);
1363 spin_lock_init(&clp
->cl_lock
);
1364 nfsd4_init_callback(&clp
->cl_cb_null
);
1365 clp
->cl_time
= get_seconds();
1366 clear_bit(0, &clp
->cl_cb_slot_busy
);
1367 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1368 copy_verf(clp
, verf
);
1369 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1371 clp
->cl_cb_session
= NULL
;
1377 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1379 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1380 struct nfs4_client
*clp
;
1383 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1386 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1387 new = &((*new)->rb_left
);
1389 new = &((*new)->rb_right
);
1392 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1393 rb_insert_color(&new_clp
->cl_namenode
, root
);
1396 static struct nfs4_client
*
1397 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1400 struct rb_node
*node
= root
->rb_node
;
1401 struct nfs4_client
*clp
;
1404 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1405 cmp
= compare_blob(&clp
->cl_name
, name
);
1407 node
= node
->rb_left
;
1409 node
= node
->rb_right
;
1417 add_to_unconfirmed(struct nfs4_client
*clp
)
1419 unsigned int idhashval
;
1420 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1422 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1423 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1424 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1425 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1430 move_to_confirmed(struct nfs4_client
*clp
)
1432 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1433 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1435 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1436 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1437 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1438 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1439 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1443 static struct nfs4_client
*
1444 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1446 struct nfs4_client
*clp
;
1447 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1449 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1450 if (same_clid(&clp
->cl_clientid
, clid
)) {
1451 if ((bool)clp
->cl_minorversion
!= sessions
)
1460 static struct nfs4_client
*
1461 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1463 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1465 return find_client_in_id_table(tbl
, clid
, sessions
);
1468 static struct nfs4_client
*
1469 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1471 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1473 return find_client_in_id_table(tbl
, clid
, sessions
);
1476 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1478 return clp
->cl_exchange_flags
!= 0;
1481 static struct nfs4_client
*
1482 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1484 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1487 static struct nfs4_client
*
1488 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1490 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1494 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1496 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1497 struct sockaddr
*sa
= svc_addr(rqstp
);
1498 u32 scopeid
= rpc_get_scope_id(sa
);
1499 unsigned short expected_family
;
1501 /* Currently, we only support tcp and tcp6 for the callback channel */
1502 if (se
->se_callback_netid_len
== 3 &&
1503 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1504 expected_family
= AF_INET
;
1505 else if (se
->se_callback_netid_len
== 4 &&
1506 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1507 expected_family
= AF_INET6
;
1511 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1512 se
->se_callback_addr_len
,
1513 (struct sockaddr
*)&conn
->cb_addr
,
1514 sizeof(conn
->cb_addr
));
1516 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1519 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1520 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1522 conn
->cb_prog
= se
->se_callback_prog
;
1523 conn
->cb_ident
= se
->se_callback_ident
;
1524 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1527 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1528 conn
->cb_addrlen
= 0;
1529 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1530 "will not receive delegations\n",
1531 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1537 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1540 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1542 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1545 dprintk("--> %s slot %p\n", __func__
, slot
);
1547 slot
->sl_opcnt
= resp
->opcnt
;
1548 slot
->sl_status
= resp
->cstate
.status
;
1550 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1551 if (nfsd4_not_cached(resp
)) {
1552 slot
->sl_datalen
= 0;
1555 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1556 base
= (char *)resp
->cstate
.datap
-
1557 (char *)resp
->xbuf
->head
[0].iov_base
;
1558 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1560 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1565 * Encode the replay sequence operation from the slot values.
1566 * If cachethis is FALSE encode the uncached rep error on the next
1567 * operation which sets resp->p and increments resp->opcnt for
1568 * nfs4svc_encode_compoundres.
1572 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1573 struct nfsd4_compoundres
*resp
)
1575 struct nfsd4_op
*op
;
1576 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1578 /* Encode the replayed sequence operation */
1579 op
= &args
->ops
[resp
->opcnt
- 1];
1580 nfsd4_encode_operation(resp
, op
);
1582 /* Return nfserr_retry_uncached_rep in next operation. */
1583 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1584 op
= &args
->ops
[resp
->opcnt
++];
1585 op
->status
= nfserr_retry_uncached_rep
;
1586 nfsd4_encode_operation(resp
, op
);
1592 * The sequence operation is not cached because we can use the slot and
1596 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1597 struct nfsd4_sequence
*seq
)
1599 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1602 dprintk("--> %s slot %p\n", __func__
, slot
);
1604 /* Either returns 0 or nfserr_retry_uncached */
1605 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1606 if (status
== nfserr_retry_uncached_rep
)
1609 /* The sequence operation has been encoded, cstate->datap set. */
1610 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1612 resp
->opcnt
= slot
->sl_opcnt
;
1613 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1614 status
= slot
->sl_status
;
1620 * Set the exchange_id flags returned by the server.
1623 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1625 /* pNFS is not supported */
1626 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1628 /* Referrals are supported, Migration is not. */
1629 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1631 /* set the wire flags to return to client. */
1632 clid
->flags
= new->cl_exchange_flags
;
1635 static bool client_has_state(struct nfs4_client
*clp
)
1638 * Note clp->cl_openowners check isn't quite right: there's no
1639 * need to count owners without stateid's.
1641 * Also note we should probably be using this in 4.0 case too.
1643 return !list_empty(&clp
->cl_openowners
)
1644 || !list_empty(&clp
->cl_delegations
)
1645 || !list_empty(&clp
->cl_sessions
);
1649 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1650 struct nfsd4_compound_state
*cstate
,
1651 struct nfsd4_exchange_id
*exid
)
1653 struct nfs4_client
*unconf
, *conf
, *new;
1655 char addr_str
[INET6_ADDRSTRLEN
];
1656 nfs4_verifier verf
= exid
->verifier
;
1657 struct sockaddr
*sa
= svc_addr(rqstp
);
1658 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1659 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1661 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1662 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1663 "ip_addr=%s flags %x, spa_how %d\n",
1664 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1665 addr_str
, exid
->flags
, exid
->spa_how
);
1667 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1668 return nfserr_inval
;
1670 switch (exid
->spa_how
) {
1672 if (!svc_rqst_integrity_protected(rqstp
))
1673 return nfserr_inval
;
1676 default: /* checked by xdr code */
1679 return nfserr_encr_alg_unsupp
;
1682 /* Cases below refer to rfc 5661 section 18.35.4: */
1684 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1686 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1687 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1690 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1691 status
= nfserr_inval
;
1694 if (!mach_creds_match(conf
, rqstp
)) {
1695 status
= nfserr_wrong_cred
;
1698 if (!creds_match
) { /* case 9 */
1699 status
= nfserr_perm
;
1702 if (!verfs_match
) { /* case 8 */
1703 status
= nfserr_not_same
;
1707 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1711 if (!creds_match
) { /* case 3 */
1712 if (client_has_state(conf
)) {
1713 status
= nfserr_clid_inuse
;
1716 expire_client(conf
);
1719 if (verfs_match
) { /* case 2 */
1720 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1724 /* case 5, client reboot */
1728 if (update
) { /* case 7 */
1729 status
= nfserr_noent
;
1733 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1734 if (unconf
) /* case 4, possible retry or client restart */
1735 expire_client(unconf
);
1737 /* case 1 (normal case) */
1739 new = create_client(exid
->clname
, rqstp
, &verf
);
1741 status
= nfserr_jukebox
;
1744 new->cl_minorversion
= cstate
->minorversion
;
1745 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1748 add_to_unconfirmed(new);
1750 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1751 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1753 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1754 nfsd4_set_ex_flags(new, exid
);
1756 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1757 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1761 nfs4_unlock_state();
1766 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1768 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1771 /* The slot is in use, and no response has been sent. */
1773 if (seqid
== slot_seqid
)
1774 return nfserr_jukebox
;
1776 return nfserr_seq_misordered
;
1778 /* Note unsigned 32-bit arithmetic handles wraparound: */
1779 if (likely(seqid
== slot_seqid
+ 1))
1781 if (seqid
== slot_seqid
)
1782 return nfserr_replay_cache
;
1783 return nfserr_seq_misordered
;
1787 * Cache the create session result into the create session single DRC
1788 * slot cache by saving the xdr structure. sl_seqid has been set.
1789 * Do this for solo or embedded create session operations.
1792 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1793 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1795 slot
->sl_status
= nfserr
;
1796 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1800 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1801 struct nfsd4_clid_slot
*slot
)
1803 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1804 return slot
->sl_status
;
1807 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1808 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1809 1 + /* MIN tag is length with zero, only length */ \
1810 3 + /* version, opcount, opcode */ \
1811 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1812 /* seqid, slotID, slotID, cache */ \
1813 4 ) * sizeof(__be32))
1815 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1816 2 + /* verifier: AUTH_NULL, length 0 */\
1818 1 + /* MIN tag is length with zero, only length */ \
1819 3 + /* opcount, opcode, opstatus*/ \
1820 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1821 /* seqid, slotID, slotID, slotID, status */ \
1822 5 ) * sizeof(__be32))
1824 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1826 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1828 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1829 return nfserr_toosmall
;
1830 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1831 return nfserr_toosmall
;
1832 ca
->headerpadsz
= 0;
1833 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1834 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1835 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1836 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1837 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1838 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1840 * Note decreasing slot size below client's request may make it
1841 * difficult for client to function correctly, whereas
1842 * decreasing the number of slots will (just?) affect
1843 * performance. When short on memory we therefore prefer to
1844 * decrease number of slots instead of their size. Clients that
1845 * request larger slots than they need will get poor results:
1847 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1849 return nfserr_jukebox
;
1854 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1856 ca
->headerpadsz
= 0;
1859 * These RPC_MAX_HEADER macros are overkill, especially since we
1860 * don't even do gss on the backchannel yet. But this is still
1861 * less than 1k. Tighten up this estimate in the unlikely event
1862 * it turns out to be a problem for some client:
1864 if (ca
->maxreq_sz
< NFS4_enc_cb_recall_sz
+ RPC_MAX_HEADER_WITH_AUTH
)
1865 return nfserr_toosmall
;
1866 if (ca
->maxresp_sz
< NFS4_dec_cb_recall_sz
+ RPC_MAX_REPHEADER_WITH_AUTH
)
1867 return nfserr_toosmall
;
1868 ca
->maxresp_cached
= 0;
1870 return nfserr_toosmall
;
1875 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1877 switch (cbs
->flavor
) {
1883 * GSS case: the spec doesn't allow us to return this
1884 * error. But it also doesn't allow us not to support
1886 * I'd rather this fail hard than return some error the
1887 * client might think it can already handle:
1889 return nfserr_encr_alg_unsupp
;
1894 nfsd4_create_session(struct svc_rqst
*rqstp
,
1895 struct nfsd4_compound_state
*cstate
,
1896 struct nfsd4_create_session
*cr_ses
)
1898 struct sockaddr
*sa
= svc_addr(rqstp
);
1899 struct nfs4_client
*conf
, *unconf
;
1900 struct nfsd4_session
*new;
1901 struct nfsd4_conn
*conn
;
1902 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1904 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1906 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1907 return nfserr_inval
;
1908 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
1911 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1914 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1917 status
= nfserr_jukebox
;
1918 new = alloc_session(&cr_ses
->fore_channel
);
1920 goto out_release_drc_mem
;
1921 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1923 goto out_free_session
;
1926 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1927 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1928 WARN_ON_ONCE(conf
&& unconf
);
1931 status
= nfserr_wrong_cred
;
1932 if (!mach_creds_match(conf
, rqstp
))
1934 cs_slot
= &conf
->cl_cs_slot
;
1935 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1936 if (status
== nfserr_replay_cache
) {
1937 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1939 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1940 status
= nfserr_seq_misordered
;
1943 } else if (unconf
) {
1944 struct nfs4_client
*old
;
1945 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1946 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1947 status
= nfserr_clid_inuse
;
1950 status
= nfserr_wrong_cred
;
1951 if (!mach_creds_match(unconf
, rqstp
))
1953 cs_slot
= &unconf
->cl_cs_slot
;
1954 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1956 /* an unconfirmed replay returns misordered */
1957 status
= nfserr_seq_misordered
;
1960 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1962 status
= mark_client_expired(old
);
1967 move_to_confirmed(unconf
);
1970 status
= nfserr_stale_clientid
;
1975 * We do not support RDMA or persistent sessions
1977 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1978 cr_ses
->flags
&= ~SESSION4_RDMA
;
1980 init_session(rqstp
, new, conf
, cr_ses
);
1981 nfsd4_init_conn(rqstp
, conn
, new);
1983 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1984 NFS4_MAX_SESSIONID_LEN
);
1985 cs_slot
->sl_seqid
++;
1986 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1988 /* cache solo and embedded create sessions under the state lock */
1989 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1990 nfs4_unlock_state();
1993 nfs4_unlock_state();
1996 __free_session(new);
1997 out_release_drc_mem
:
1998 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2002 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2005 case NFS4_CDFC4_FORE
:
2006 case NFS4_CDFC4_BACK
:
2008 case NFS4_CDFC4_FORE_OR_BOTH
:
2009 case NFS4_CDFC4_BACK_OR_BOTH
:
2010 *dir
= NFS4_CDFC4_BOTH
;
2013 return nfserr_inval
;
2016 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2018 struct nfsd4_session
*session
= cstate
->session
;
2019 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2022 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2025 spin_lock(&nn
->client_lock
);
2026 session
->se_cb_prog
= bc
->bc_cb_program
;
2027 session
->se_cb_sec
= bc
->bc_cb_sec
;
2028 spin_unlock(&nn
->client_lock
);
2030 nfsd4_probe_callback(session
->se_client
);
2035 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2036 struct nfsd4_compound_state
*cstate
,
2037 struct nfsd4_bind_conn_to_session
*bcts
)
2040 struct nfsd4_conn
*conn
;
2041 struct nfsd4_session
*session
;
2042 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2044 if (!nfsd4_last_compound_op(rqstp
))
2045 return nfserr_not_only_op
;
2047 spin_lock(&nn
->client_lock
);
2048 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2049 spin_unlock(&nn
->client_lock
);
2050 status
= nfserr_badsession
;
2053 status
= nfserr_wrong_cred
;
2054 if (!mach_creds_match(session
->se_client
, rqstp
))
2056 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2059 conn
= alloc_conn(rqstp
, bcts
->dir
);
2060 status
= nfserr_jukebox
;
2063 nfsd4_init_conn(rqstp
, conn
, session
);
2066 nfs4_unlock_state();
2070 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2074 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2078 nfsd4_destroy_session(struct svc_rqst
*r
,
2079 struct nfsd4_compound_state
*cstate
,
2080 struct nfsd4_destroy_session
*sessionid
)
2082 struct nfsd4_session
*ses
;
2084 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2087 status
= nfserr_not_only_op
;
2088 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2089 if (!nfsd4_last_compound_op(r
))
2092 dump_sessionid(__func__
, &sessionid
->sessionid
);
2093 spin_lock(&nn
->client_lock
);
2094 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2095 status
= nfserr_badsession
;
2097 goto out_client_lock
;
2098 status
= nfserr_wrong_cred
;
2099 if (!mach_creds_match(ses
->se_client
, r
))
2100 goto out_client_lock
;
2101 status
= mark_session_dead_locked(ses
);
2103 goto out_client_lock
;
2104 unhash_session(ses
);
2105 spin_unlock(&nn
->client_lock
);
2107 nfsd4_probe_callback_sync(ses
->se_client
);
2109 spin_lock(&nn
->client_lock
);
2113 spin_unlock(&nn
->client_lock
);
2115 nfs4_unlock_state();
2119 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2121 struct nfsd4_conn
*c
;
2123 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2124 if (c
->cn_xprt
== xpt
) {
2131 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2133 struct nfs4_client
*clp
= ses
->se_client
;
2134 struct nfsd4_conn
*c
;
2135 __be32 status
= nfs_ok
;
2138 spin_lock(&clp
->cl_lock
);
2139 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2142 status
= nfserr_conn_not_bound_to_session
;
2143 if (clp
->cl_mach_cred
)
2145 __nfsd4_hash_conn(new, ses
);
2146 spin_unlock(&clp
->cl_lock
);
2147 ret
= nfsd4_register_conn(new);
2149 /* oops; xprt is already down: */
2150 nfsd4_conn_lost(&new->cn_xpt_user
);
2153 spin_unlock(&clp
->cl_lock
);
2158 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2160 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2162 return args
->opcnt
> session
->se_fchannel
.maxops
;
2165 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2166 struct nfsd4_session
*session
)
2168 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2170 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2174 nfsd4_sequence(struct svc_rqst
*rqstp
,
2175 struct nfsd4_compound_state
*cstate
,
2176 struct nfsd4_sequence
*seq
)
2178 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2179 struct nfsd4_session
*session
;
2180 struct nfs4_client
*clp
;
2181 struct nfsd4_slot
*slot
;
2182 struct nfsd4_conn
*conn
;
2184 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2186 if (resp
->opcnt
!= 1)
2187 return nfserr_sequence_pos
;
2190 * Will be either used or freed by nfsd4_sequence_check_conn
2193 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2195 return nfserr_jukebox
;
2197 spin_lock(&nn
->client_lock
);
2198 status
= nfserr_badsession
;
2199 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2201 goto out_no_session
;
2202 clp
= session
->se_client
;
2203 status
= get_client_locked(clp
);
2205 goto out_no_session
;
2206 status
= nfsd4_get_session_locked(session
);
2208 goto out_put_client
;
2210 status
= nfserr_too_many_ops
;
2211 if (nfsd4_session_too_many_ops(rqstp
, session
))
2212 goto out_put_session
;
2214 status
= nfserr_req_too_big
;
2215 if (nfsd4_request_too_big(rqstp
, session
))
2216 goto out_put_session
;
2218 status
= nfserr_badslot
;
2219 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2220 goto out_put_session
;
2222 slot
= session
->se_slots
[seq
->slotid
];
2223 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2225 /* We do not negotiate the number of slots yet, so set the
2226 * maxslots to the session maxreqs which is used to encode
2227 * sr_highest_slotid and the sr_target_slot id to maxslots */
2228 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2230 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2231 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2232 if (status
== nfserr_replay_cache
) {
2233 status
= nfserr_seq_misordered
;
2234 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2235 goto out_put_session
;
2236 cstate
->slot
= slot
;
2237 cstate
->session
= session
;
2238 /* Return the cached reply status and set cstate->status
2239 * for nfsd4_proc_compound processing */
2240 status
= nfsd4_replay_cache_entry(resp
, seq
);
2241 cstate
->status
= nfserr_replay_cache
;
2245 goto out_put_session
;
2247 status
= nfsd4_sequence_check_conn(conn
, session
);
2250 goto out_put_session
;
2252 /* Success! bump slot seqid */
2253 slot
->sl_seqid
= seq
->seqid
;
2254 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2256 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2258 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2260 cstate
->slot
= slot
;
2261 cstate
->session
= session
;
2264 switch (clp
->cl_cb_state
) {
2266 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2268 case NFSD4_CB_FAULT
:
2269 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2272 seq
->status_flags
= 0;
2274 if (!list_empty(&clp
->cl_revoked
))
2275 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2278 spin_unlock(&nn
->client_lock
);
2281 nfsd4_put_session(session
);
2283 put_client_renew_locked(clp
);
2284 goto out_no_session
;
2288 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2290 struct nfs4_client
*conf
, *unconf
, *clp
;
2292 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2295 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2296 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2297 WARN_ON_ONCE(conf
&& unconf
);
2302 if (client_has_state(conf
)) {
2303 status
= nfserr_clientid_busy
;
2309 status
= nfserr_stale_clientid
;
2312 if (!mach_creds_match(clp
, rqstp
)) {
2313 status
= nfserr_wrong_cred
;
2318 nfs4_unlock_state();
2323 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2327 if (rc
->rca_one_fs
) {
2328 if (!cstate
->current_fh
.fh_dentry
)
2329 return nfserr_nofilehandle
;
2331 * We don't take advantage of the rca_one_fs case.
2332 * That's OK, it's optional, we can safely ignore it.
2338 status
= nfserr_complete_already
;
2339 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2340 &cstate
->session
->se_client
->cl_flags
))
2343 status
= nfserr_stale_clientid
;
2344 if (is_client_expired(cstate
->session
->se_client
))
2346 * The following error isn't really legal.
2347 * But we only get here if the client just explicitly
2348 * destroyed the client. Surely it no longer cares what
2349 * error it gets back on an operation for the dead
2355 nfsd4_client_record_create(cstate
->session
->se_client
);
2357 nfs4_unlock_state();
2362 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2363 struct nfsd4_setclientid
*setclid
)
2365 struct xdr_netobj clname
= setclid
->se_name
;
2366 nfs4_verifier clverifier
= setclid
->se_verf
;
2367 struct nfs4_client
*conf
, *unconf
, *new;
2369 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2371 /* Cases below refer to rfc 3530 section 14.2.33: */
2373 conf
= find_confirmed_client_by_name(&clname
, nn
);
2376 status
= nfserr_clid_inuse
;
2377 if (clp_used_exchangeid(conf
))
2379 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2380 char addr_str
[INET6_ADDRSTRLEN
];
2381 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2383 dprintk("NFSD: setclientid: string in use by client "
2384 "at %s\n", addr_str
);
2388 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2390 expire_client(unconf
);
2391 status
= nfserr_jukebox
;
2392 new = create_client(clname
, rqstp
, &clverifier
);
2395 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2396 /* case 1: probable callback update */
2397 copy_clid(new, conf
);
2398 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2400 new->cl_minorversion
= 0;
2401 gen_callback(new, setclid
, rqstp
);
2402 add_to_unconfirmed(new);
2403 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2404 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2405 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2408 nfs4_unlock_state();
2414 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2415 struct nfsd4_compound_state
*cstate
,
2416 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2418 struct nfs4_client
*conf
, *unconf
;
2419 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2420 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2422 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2424 if (STALE_CLIENTID(clid
, nn
))
2425 return nfserr_stale_clientid
;
2428 conf
= find_confirmed_client(clid
, false, nn
);
2429 unconf
= find_unconfirmed_client(clid
, false, nn
);
2431 * We try hard to give out unique clientid's, so if we get an
2432 * attempt to confirm the same clientid with a different cred,
2433 * there's a bug somewhere. Let's charitably assume it's our
2436 status
= nfserr_serverfault
;
2437 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2439 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2441 /* cases below refer to rfc 3530 section 14.2.34: */
2442 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2443 if (conf
&& !unconf
) /* case 2: probable retransmit */
2445 else /* case 4: client hasn't noticed we rebooted yet? */
2446 status
= nfserr_stale_clientid
;
2450 if (conf
) { /* case 1: callback update */
2451 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2452 nfsd4_probe_callback(conf
);
2453 expire_client(unconf
);
2454 } else { /* case 3: normal case; new or rebooted client */
2455 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2457 status
= mark_client_expired(conf
);
2460 expire_client(conf
);
2462 move_to_confirmed(unconf
);
2463 nfsd4_probe_callback(unconf
);
2466 nfs4_unlock_state();
2470 static struct nfs4_file
*nfsd4_alloc_file(void)
2472 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2475 /* OPEN Share state helper functions */
2476 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2478 unsigned int hashval
= file_hashval(ino
);
2480 atomic_set(&fp
->fi_ref
, 1);
2481 INIT_LIST_HEAD(&fp
->fi_stateids
);
2482 INIT_LIST_HEAD(&fp
->fi_delegations
);
2483 fp
->fi_inode
= igrab(ino
);
2484 fp
->fi_had_conflict
= false;
2485 fp
->fi_lease
= NULL
;
2486 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2487 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2488 spin_lock(&recall_lock
);
2489 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2490 spin_unlock(&recall_lock
);
2494 nfsd4_free_slab(struct kmem_cache
**slab
)
2498 kmem_cache_destroy(*slab
);
2503 nfsd4_free_slabs(void)
2505 nfsd4_free_slab(&openowner_slab
);
2506 nfsd4_free_slab(&lockowner_slab
);
2507 nfsd4_free_slab(&file_slab
);
2508 nfsd4_free_slab(&stateid_slab
);
2509 nfsd4_free_slab(&deleg_slab
);
2513 nfsd4_init_slabs(void)
2515 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2516 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2517 if (openowner_slab
== NULL
)
2519 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2520 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2521 if (lockowner_slab
== NULL
)
2523 file_slab
= kmem_cache_create("nfsd4_files",
2524 sizeof(struct nfs4_file
), 0, 0, NULL
);
2525 if (file_slab
== NULL
)
2527 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2528 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2529 if (stateid_slab
== NULL
)
2531 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2532 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2533 if (deleg_slab
== NULL
)
2538 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2542 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2544 kfree(oo
->oo_owner
.so_owner
.data
);
2545 kmem_cache_free(openowner_slab
, oo
);
2548 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2550 kfree(lo
->lo_owner
.so_owner
.data
);
2551 kmem_cache_free(lockowner_slab
, lo
);
2554 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2556 rp
->rp_status
= nfserr_serverfault
;
2558 rp
->rp_buf
= rp
->rp_ibuf
;
2561 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2563 struct nfs4_stateowner
*sop
;
2565 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2569 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2570 if (!sop
->so_owner
.data
) {
2571 kmem_cache_free(slab
, sop
);
2574 sop
->so_owner
.len
= owner
->len
;
2576 INIT_LIST_HEAD(&sop
->so_stateids
);
2577 sop
->so_client
= clp
;
2578 init_nfs4_replay(&sop
->so_replay
);
2582 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2584 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2586 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2587 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2590 static struct nfs4_openowner
*
2591 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2592 struct nfs4_openowner
*oo
;
2594 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2597 oo
->oo_owner
.so_is_open_owner
= 1;
2598 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2599 oo
->oo_flags
= NFS4_OO_NEW
;
2601 oo
->oo_last_closed_stid
= NULL
;
2602 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2603 hash_openowner(oo
, clp
, strhashval
);
2607 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2608 struct nfs4_openowner
*oo
= open
->op_openowner
;
2610 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2611 INIT_LIST_HEAD(&stp
->st_lockowners
);
2612 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2613 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2614 stp
->st_stateowner
= &oo
->oo_owner
;
2617 stp
->st_access_bmap
= 0;
2618 stp
->st_deny_bmap
= 0;
2619 set_access(open
->op_share_access
, stp
);
2620 set_deny(open
->op_share_deny
, stp
);
2621 stp
->st_openstp
= NULL
;
2625 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2627 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2629 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2631 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2632 oo
->oo_time
= get_seconds();
2636 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2639 return (sop
->so_owner
.len
== owner
->len
) &&
2640 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2641 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2644 static struct nfs4_openowner
*
2645 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2646 bool sessions
, struct nfsd_net
*nn
)
2648 struct nfs4_stateowner
*so
;
2649 struct nfs4_openowner
*oo
;
2650 struct nfs4_client
*clp
;
2652 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2653 if (!so
->so_is_open_owner
)
2655 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2657 clp
= oo
->oo_owner
.so_client
;
2658 if ((bool)clp
->cl_minorversion
!= sessions
)
2660 renew_client(oo
->oo_owner
.so_client
);
2667 /* search file_hashtbl[] for file */
2668 static struct nfs4_file
*
2669 find_file(struct inode
*ino
)
2671 unsigned int hashval
= file_hashval(ino
);
2672 struct nfs4_file
*fp
;
2674 spin_lock(&recall_lock
);
2675 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2676 if (fp
->fi_inode
== ino
) {
2678 spin_unlock(&recall_lock
);
2682 spin_unlock(&recall_lock
);
2687 * Called to check deny when READ with all zero stateid or
2688 * WRITE with all zero or all one stateid
2691 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2693 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2694 struct nfs4_file
*fp
;
2695 struct nfs4_ol_stateid
*stp
;
2698 fp
= find_file(ino
);
2701 ret
= nfserr_locked
;
2702 /* Search for conflicting share reservations */
2703 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2704 if (test_deny(deny_type
, stp
) ||
2705 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2714 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2716 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2717 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2719 /* We're assuming the state code never drops its reference
2720 * without first removing the lease. Since we're in this lease
2721 * callback (and since the lease code is serialized by the kernel
2722 * lock) we know the server hasn't removed the lease yet, we know
2723 * it's safe to take a reference: */
2724 atomic_inc(&dp
->dl_count
);
2726 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2728 /* only place dl_time is set. protected by lock_flocks*/
2729 dp
->dl_time
= get_seconds();
2731 nfsd4_cb_recall(dp
);
2734 /* Called from break_lease() with lock_flocks() held. */
2735 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2737 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2738 struct nfs4_delegation
*dp
;
2741 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2744 if (fp
->fi_had_conflict
) {
2745 WARN(1, "duplicate break on %p\n", fp
);
2749 * We don't want the locks code to timeout the lease for us;
2750 * we'll remove it ourself if a delegation isn't returned
2753 fl
->fl_break_time
= 0;
2755 spin_lock(&recall_lock
);
2756 fp
->fi_had_conflict
= true;
2757 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2758 nfsd_break_one_deleg(dp
);
2759 spin_unlock(&recall_lock
);
2763 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2766 return lease_modify(onlist
, arg
);
2771 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2772 .lm_break
= nfsd_break_deleg_cb
,
2773 .lm_change
= nfsd_change_deleg_cb
,
2776 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2778 if (nfsd4_has_session(cstate
))
2780 if (seqid
== so
->so_seqid
- 1)
2781 return nfserr_replay_me
;
2782 if (seqid
== so
->so_seqid
)
2784 return nfserr_bad_seqid
;
2788 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2789 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2791 clientid_t
*clientid
= &open
->op_clientid
;
2792 struct nfs4_client
*clp
= NULL
;
2793 unsigned int strhashval
;
2794 struct nfs4_openowner
*oo
= NULL
;
2797 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2798 return nfserr_stale_clientid
;
2800 * In case we need it later, after we've already created the
2801 * file and don't want to risk a further failure:
2803 open
->op_file
= nfsd4_alloc_file();
2804 if (open
->op_file
== NULL
)
2805 return nfserr_jukebox
;
2807 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2808 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2809 open
->op_openowner
= oo
;
2811 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2814 return nfserr_expired
;
2817 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2818 /* Replace unconfirmed owners without checking for replay. */
2819 clp
= oo
->oo_owner
.so_client
;
2820 release_openowner(oo
);
2821 open
->op_openowner
= NULL
;
2824 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2827 clp
= oo
->oo_owner
.so_client
;
2830 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2832 return nfserr_jukebox
;
2833 open
->op_openowner
= oo
;
2835 open
->op_stp
= nfs4_alloc_stateid(clp
);
2837 return nfserr_jukebox
;
2841 static inline __be32
2842 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2844 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2845 return nfserr_openmode
;
2850 static int share_access_to_flags(u32 share_access
)
2852 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2855 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2857 struct nfs4_stid
*ret
;
2859 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2862 return delegstateid(ret
);
2865 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2867 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2868 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2872 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2873 struct nfs4_delegation
**dp
)
2876 __be32 status
= nfserr_bad_stateid
;
2878 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2881 flags
= share_access_to_flags(open
->op_share_access
);
2882 status
= nfs4_check_delegmode(*dp
, flags
);
2886 if (!nfsd4_is_deleg_cur(open
))
2890 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2895 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2897 struct nfs4_ol_stateid
*local
;
2898 struct nfs4_openowner
*oo
= open
->op_openowner
;
2900 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2901 /* ignore lock owners */
2902 if (local
->st_stateowner
->so_is_open_owner
== 0)
2904 /* remember if we have seen this open owner */
2905 if (local
->st_stateowner
== &oo
->oo_owner
)
2907 /* check for conflicting share reservations */
2908 if (!test_share(local
, open
))
2909 return nfserr_share_denied
;
2914 static inline int nfs4_access_to_access(u32 nfs4_access
)
2918 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2919 flags
|= NFSD_MAY_READ
;
2920 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2921 flags
|= NFSD_MAY_WRITE
;
2925 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2926 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2929 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2930 int access
= nfs4_access_to_access(open
->op_share_access
);
2932 if (!fp
->fi_fds
[oflag
]) {
2933 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2934 &fp
->fi_fds
[oflag
]);
2938 nfs4_file_get_access(fp
, oflag
);
2943 static inline __be32
2944 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2945 struct nfsd4_open
*open
)
2947 struct iattr iattr
= {
2948 .ia_valid
= ATTR_SIZE
,
2951 if (!open
->op_truncate
)
2953 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2954 return nfserr_inval
;
2955 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2959 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
)
2961 u32 op_share_access
= open
->op_share_access
;
2965 new_access
= !test_access(op_share_access
, stp
);
2967 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2971 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2974 int oflag
= nfs4_access_to_omode(op_share_access
);
2975 nfs4_file_put_access(fp
, oflag
);
2979 /* remember the open */
2980 set_access(op_share_access
, stp
);
2981 set_deny(open
->op_share_deny
, stp
);
2988 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2990 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2993 /* Should we give out recallable state?: */
2994 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2996 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2999 * In the sessions case, since we don't have to establish a
3000 * separate connection for callbacks, we assume it's OK
3001 * until we hear otherwise:
3003 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3006 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3008 struct file_lock
*fl
;
3010 fl
= locks_alloc_lock();
3013 locks_init_lock(fl
);
3014 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3015 fl
->fl_flags
= FL_LEASE
;
3016 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3017 fl
->fl_end
= OFFSET_MAX
;
3018 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3019 fl
->fl_pid
= current
->tgid
;
3023 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
3025 struct nfs4_file
*fp
= dp
->dl_file
;
3026 struct file_lock
*fl
;
3029 fl
= nfs4_alloc_init_lease(dp
, flag
);
3032 fl
->fl_file
= find_readable_file(fp
);
3033 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3034 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3036 list_del_init(&dp
->dl_perclnt
);
3037 locks_free_lock(fl
);
3041 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3042 atomic_set(&fp
->fi_delegees
, 1);
3043 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3047 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
3049 struct nfs4_file
*fp
= dp
->dl_file
;
3052 return nfs4_setlease(dp
, flag
);
3053 spin_lock(&recall_lock
);
3054 if (fp
->fi_had_conflict
) {
3055 spin_unlock(&recall_lock
);
3058 atomic_inc(&fp
->fi_delegees
);
3059 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3060 spin_unlock(&recall_lock
);
3061 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3065 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3067 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3068 if (status
== -EAGAIN
)
3069 open
->op_why_no_deleg
= WND4_CONTENTION
;
3071 open
->op_why_no_deleg
= WND4_RESOURCE
;
3072 switch (open
->op_deleg_want
) {
3073 case NFS4_SHARE_WANT_READ_DELEG
:
3074 case NFS4_SHARE_WANT_WRITE_DELEG
:
3075 case NFS4_SHARE_WANT_ANY_DELEG
:
3077 case NFS4_SHARE_WANT_CANCEL
:
3078 open
->op_why_no_deleg
= WND4_CANCELLED
;
3080 case NFS4_SHARE_WANT_NO_DELEG
:
3087 * Attempt to hand out a delegation.
3090 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3091 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3093 struct nfs4_delegation
*dp
;
3094 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3096 int status
= 0, flag
= 0;
3098 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3099 flag
= NFS4_OPEN_DELEGATE_NONE
;
3100 open
->op_recall
= 0;
3101 switch (open
->op_claim_type
) {
3102 case NFS4_OPEN_CLAIM_PREVIOUS
:
3104 open
->op_recall
= 1;
3105 flag
= open
->op_delegate_type
;
3106 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
3109 case NFS4_OPEN_CLAIM_NULL
:
3110 /* Let's not give out any delegations till everyone's
3111 * had the chance to reclaim theirs.... */
3112 if (locks_in_grace(net
))
3114 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3116 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3117 flag
= NFS4_OPEN_DELEGATE_WRITE
;
3119 flag
= NFS4_OPEN_DELEGATE_READ
;
3125 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
3128 status
= nfs4_set_delegation(dp
, flag
);
3132 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3134 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3135 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3137 open
->op_delegate_type
= flag
;
3138 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
3139 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3140 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
3141 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3143 /* 4.1 client asking for a delegation? */
3144 if (open
->op_deleg_want
)
3145 nfsd4_open_deleg_none_ext(open
, status
);
3149 unhash_stid(&dp
->dl_stid
);
3150 nfs4_put_delegation(dp
);
3152 flag
= NFS4_OPEN_DELEGATE_NONE
;
3156 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3157 struct nfs4_delegation
*dp
)
3159 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3160 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3161 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3162 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3163 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3164 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3165 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3166 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3168 /* Otherwise the client must be confused wanting a delegation
3169 * it already has, therefore we don't return
3170 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3175 * called with nfs4_lock_state() held.
3178 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3180 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3181 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3182 struct nfs4_file
*fp
= NULL
;
3183 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3184 struct nfs4_ol_stateid
*stp
= NULL
;
3185 struct nfs4_delegation
*dp
= NULL
;
3189 * Lookup file; if found, lookup stateid and check open request,
3190 * and check for delegations in the process of being recalled.
3191 * If not found, create the nfs4_file struct
3193 fp
= find_file(ino
);
3195 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3197 status
= nfs4_check_deleg(cl
, open
, &dp
);
3201 status
= nfserr_bad_stateid
;
3202 if (nfsd4_is_deleg_cur(open
))
3204 status
= nfserr_jukebox
;
3206 open
->op_file
= NULL
;
3207 nfsd4_init_file(fp
, ino
);
3211 * OPEN the file, or upgrade an existing OPEN.
3212 * If truncate fails, the OPEN fails.
3215 /* Stateid was found, this is an OPEN upgrade */
3216 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3220 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3223 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3227 open
->op_stp
= NULL
;
3228 init_open_stateid(stp
, fp
, open
);
3230 update_stateid(&stp
->st_stid
.sc_stateid
);
3231 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3233 if (nfsd4_has_session(&resp
->cstate
)) {
3234 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3236 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3237 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3238 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3244 * Attempt to hand out a delegation. No error return, because the
3245 * OPEN succeeds even if we fail.
3247 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3251 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3252 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3254 /* 4.1 client trying to upgrade/downgrade delegation? */
3255 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3256 open
->op_deleg_want
)
3257 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3261 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3262 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3264 * To finish the open response, we just need to set the rflags.
3266 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3267 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3268 !nfsd4_has_session(&resp
->cstate
))
3269 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3274 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3276 if (open
->op_openowner
) {
3277 struct nfs4_openowner
*oo
= open
->op_openowner
;
3279 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3280 list_del_init(&oo
->oo_close_lru
);
3281 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3283 release_openowner(oo
);
3284 open
->op_openowner
= NULL
;
3286 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3290 nfsd4_free_file(open
->op_file
);
3292 free_generic_stateid(open
->op_stp
);
3295 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3297 struct nfs4_client
*found
;
3299 if (STALE_CLIENTID(clid
, nn
))
3300 return nfserr_stale_clientid
;
3301 found
= find_confirmed_client(clid
, session
, nn
);
3304 return found
? nfs_ok
: nfserr_expired
;
3308 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3311 struct nfs4_client
*clp
;
3313 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3316 dprintk("process_renew(%08x/%08x): starting\n",
3317 clid
->cl_boot
, clid
->cl_id
);
3318 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3321 status
= nfserr_cb_path_down
;
3322 if (!list_empty(&clp
->cl_delegations
)
3323 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3327 nfs4_unlock_state();
3332 nfsd4_end_grace(struct nfsd_net
*nn
)
3334 /* do nothing if grace period already ended */
3335 if (nn
->grace_ended
)
3338 dprintk("NFSD: end of grace period\n");
3339 nn
->grace_ended
= true;
3340 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3341 locks_end_grace(&nn
->nfsd4_manager
);
3343 * Now that every NFSv4 client has had the chance to recover and
3344 * to see the (possibly new, possibly shorter) lease time, we
3345 * can safely set the next grace time to the current lease time:
3347 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3351 nfs4_laundromat(struct nfsd_net
*nn
)
3353 struct nfs4_client
*clp
;
3354 struct nfs4_openowner
*oo
;
3355 struct nfs4_delegation
*dp
;
3356 struct list_head
*pos
, *next
, reaplist
;
3357 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3358 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3359 time_t u
, test_val
= nn
->nfsd4_lease
;
3363 dprintk("NFSD: laundromat service - starting\n");
3364 nfsd4_end_grace(nn
);
3365 INIT_LIST_HEAD(&reaplist
);
3366 spin_lock(&nn
->client_lock
);
3367 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3368 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3369 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3370 t
= clp
->cl_time
- cutoff
;
3371 if (clientid_val
> t
)
3375 if (mark_client_expired_locked(clp
)) {
3376 dprintk("NFSD: client in use (clientid %08x)\n",
3377 clp
->cl_clientid
.cl_id
);
3380 list_move(&clp
->cl_lru
, &reaplist
);
3382 spin_unlock(&nn
->client_lock
);
3383 list_for_each_safe(pos
, next
, &reaplist
) {
3384 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3385 dprintk("NFSD: purging unused client (clientid %08x)\n",
3386 clp
->cl_clientid
.cl_id
);
3389 spin_lock(&recall_lock
);
3390 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3391 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3392 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3394 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3395 u
= dp
->dl_time
- cutoff
;
3400 list_move(&dp
->dl_recall_lru
, &reaplist
);
3402 spin_unlock(&recall_lock
);
3403 list_for_each_safe(pos
, next
, &reaplist
) {
3404 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3405 revoke_delegation(dp
);
3407 test_val
= nn
->nfsd4_lease
;
3408 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3409 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3410 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3411 u
= oo
->oo_time
- cutoff
;
3416 release_openowner(oo
);
3418 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3419 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3420 nfs4_unlock_state();
3421 return clientid_val
;
3424 static struct workqueue_struct
*laundry_wq
;
3425 static void laundromat_main(struct work_struct
*);
3428 laundromat_main(struct work_struct
*laundry
)
3431 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3433 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3436 t
= nfs4_laundromat(nn
);
3437 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3438 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3441 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3443 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3444 return nfserr_bad_stateid
;
3449 access_permit_read(struct nfs4_ol_stateid
*stp
)
3451 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3452 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3453 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3457 access_permit_write(struct nfs4_ol_stateid
*stp
)
3459 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3460 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3464 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3466 __be32 status
= nfserr_openmode
;
3468 /* For lock stateid's, we test the parent open, not the lock: */
3469 if (stp
->st_openstp
)
3470 stp
= stp
->st_openstp
;
3471 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3473 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3480 static inline __be32
3481 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3483 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3485 else if (locks_in_grace(net
)) {
3486 /* Answer in remaining cases depends on existence of
3487 * conflicting state; so we must wait out the grace period. */
3488 return nfserr_grace
;
3489 } else if (flags
& WR_STATE
)
3490 return nfs4_share_conflict(current_fh
,
3491 NFS4_SHARE_DENY_WRITE
);
3492 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3493 return nfs4_share_conflict(current_fh
,
3494 NFS4_SHARE_DENY_READ
);
3498 * Allow READ/WRITE during grace period on recovered state only for files
3499 * that are not able to provide mandatory locking.
3502 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3504 return locks_in_grace(net
) && mandatory_lock(inode
);
3507 /* Returns true iff a is later than b: */
3508 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3510 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3513 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3516 * When sessions are used the stateid generation number is ignored
3519 if (has_session
&& in
->si_generation
== 0)
3522 if (in
->si_generation
== ref
->si_generation
)
3525 /* If the client sends us a stateid from the future, it's buggy: */
3526 if (stateid_generation_after(in
, ref
))
3527 return nfserr_bad_stateid
;
3529 * However, we could see a stateid from the past, even from a
3530 * non-buggy client. For example, if the client sends a lock
3531 * while some IO is outstanding, the lock may bump si_generation
3532 * while the IO is still in flight. The client could avoid that
3533 * situation by waiting for responses on all the IO requests,
3534 * but better performance may result in retrying IO that
3535 * receives an old_stateid error if requests are rarely
3536 * reordered in flight:
3538 return nfserr_old_stateid
;
3541 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3543 struct nfs4_stid
*s
;
3544 struct nfs4_ol_stateid
*ols
;
3547 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3548 return nfserr_bad_stateid
;
3549 /* Client debugging aid. */
3550 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3551 char addr_str
[INET6_ADDRSTRLEN
];
3552 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3554 pr_warn_ratelimited("NFSD: client %s testing state ID "
3555 "with incorrect client ID\n", addr_str
);
3556 return nfserr_bad_stateid
;
3558 s
= find_stateid(cl
, stateid
);
3560 return nfserr_bad_stateid
;
3561 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3564 switch (s
->sc_type
) {
3565 case NFS4_DELEG_STID
:
3567 case NFS4_REVOKED_DELEG_STID
:
3568 return nfserr_deleg_revoked
;
3569 case NFS4_OPEN_STID
:
3570 case NFS4_LOCK_STID
:
3571 ols
= openlockstateid(s
);
3572 if (ols
->st_stateowner
->so_is_open_owner
3573 && !(openowner(ols
->st_stateowner
)->oo_flags
3574 & NFS4_OO_CONFIRMED
))
3575 return nfserr_bad_stateid
;
3578 printk("unknown stateid type %x\n", s
->sc_type
);
3579 case NFS4_CLOSED_STID
:
3580 return nfserr_bad_stateid
;
3584 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3585 struct nfs4_stid
**s
, bool sessions
,
3586 struct nfsd_net
*nn
)
3588 struct nfs4_client
*cl
;
3591 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3592 return nfserr_bad_stateid
;
3593 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3595 if (status
== nfserr_stale_clientid
)
3596 return nfserr_stale_stateid
;
3599 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3601 return nfserr_bad_stateid
;
3606 * Checks for stateid operations
3609 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3610 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3612 struct nfs4_stid
*s
;
3613 struct nfs4_ol_stateid
*stp
= NULL
;
3614 struct nfs4_delegation
*dp
= NULL
;
3615 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3616 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3617 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3623 if (grace_disallows_io(net
, ino
))
3624 return nfserr_grace
;
3626 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3627 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3629 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3630 &s
, cstate
->minorversion
, nn
);
3633 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3636 switch (s
->sc_type
) {
3637 case NFS4_DELEG_STID
:
3638 dp
= delegstateid(s
);
3639 status
= nfs4_check_delegmode(dp
, flags
);
3643 *filpp
= dp
->dl_file
->fi_deleg_file
;
3646 status
= nfserr_serverfault
;
3651 case NFS4_OPEN_STID
:
3652 case NFS4_LOCK_STID
:
3653 stp
= openlockstateid(s
);
3654 status
= nfs4_check_fh(current_fh
, stp
);
3657 if (stp
->st_stateowner
->so_is_open_owner
3658 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3660 status
= nfs4_check_openmode(stp
, flags
);
3664 if (flags
& RD_STATE
)
3665 *filpp
= find_readable_file(stp
->st_file
);
3667 *filpp
= find_writeable_file(stp
->st_file
);
3671 return nfserr_bad_stateid
;
3679 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3681 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3682 return nfserr_locks_held
;
3683 release_lock_stateid(stp
);
3688 * Test if the stateid is valid
3691 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3692 struct nfsd4_test_stateid
*test_stateid
)
3694 struct nfsd4_test_stateid_id
*stateid
;
3695 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3698 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3699 stateid
->ts_id_status
=
3700 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3701 nfs4_unlock_state();
3707 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3708 struct nfsd4_free_stateid
*free_stateid
)
3710 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3711 struct nfs4_stid
*s
;
3712 struct nfs4_delegation
*dp
;
3713 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3714 __be32 ret
= nfserr_bad_stateid
;
3717 s
= find_stateid(cl
, stateid
);
3720 switch (s
->sc_type
) {
3721 case NFS4_DELEG_STID
:
3722 ret
= nfserr_locks_held
;
3724 case NFS4_OPEN_STID
:
3725 case NFS4_LOCK_STID
:
3726 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3729 if (s
->sc_type
== NFS4_LOCK_STID
)
3730 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3732 ret
= nfserr_locks_held
;
3734 case NFS4_REVOKED_DELEG_STID
:
3735 dp
= delegstateid(s
);
3736 destroy_revoked_delegation(dp
);
3740 ret
= nfserr_bad_stateid
;
3743 nfs4_unlock_state();
3750 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3751 RD_STATE
: WR_STATE
;
3754 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3756 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3757 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3760 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3763 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3764 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3766 * "Closed" stateid's exist *only* to return
3767 * nfserr_replay_me from the previous step, and
3768 * revoked delegations are kept only for free_stateid.
3770 return nfserr_bad_stateid
;
3771 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3774 return nfs4_check_fh(current_fh
, stp
);
3778 * Checks for sequence id mutating operations.
3781 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3782 stateid_t
*stateid
, char typemask
,
3783 struct nfs4_ol_stateid
**stpp
,
3784 struct nfsd_net
*nn
)
3787 struct nfs4_stid
*s
;
3789 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3790 seqid
, STATEID_VAL(stateid
));
3793 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3794 cstate
->minorversion
, nn
);
3797 *stpp
= openlockstateid(s
);
3798 if (!nfsd4_has_session(cstate
))
3799 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3801 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3804 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3805 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3808 struct nfs4_openowner
*oo
;
3810 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3811 NFS4_OPEN_STID
, stpp
, nn
);
3814 oo
= openowner((*stpp
)->st_stateowner
);
3815 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3816 return nfserr_bad_stateid
;
3821 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3822 struct nfsd4_open_confirm
*oc
)
3825 struct nfs4_openowner
*oo
;
3826 struct nfs4_ol_stateid
*stp
;
3827 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3829 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3830 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3831 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3833 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3839 status
= nfs4_preprocess_seqid_op(cstate
,
3840 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3841 NFS4_OPEN_STID
, &stp
, nn
);
3844 oo
= openowner(stp
->st_stateowner
);
3845 status
= nfserr_bad_stateid
;
3846 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3848 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3849 update_stateid(&stp
->st_stid
.sc_stateid
);
3850 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3851 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3852 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3854 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3857 nfsd4_bump_seqid(cstate
, status
);
3858 if (!cstate
->replay_owner
)
3859 nfs4_unlock_state();
3863 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3865 if (!test_access(access
, stp
))
3867 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3868 clear_access(access
, stp
);
3871 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3873 switch (to_access
) {
3874 case NFS4_SHARE_ACCESS_READ
:
3875 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3876 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3878 case NFS4_SHARE_ACCESS_WRITE
:
3879 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3880 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3882 case NFS4_SHARE_ACCESS_BOTH
:
3890 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3893 for (i
= 0; i
< 4; i
++) {
3894 if ((i
& deny
) != i
)
3900 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3901 struct nfsd4_compound_state
*cstate
,
3902 struct nfsd4_open_downgrade
*od
)
3905 struct nfs4_ol_stateid
*stp
;
3906 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3908 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3909 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3910 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3912 /* We don't yet support WANT bits: */
3913 if (od
->od_deleg_want
)
3914 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3918 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3919 &od
->od_stateid
, &stp
, nn
);
3922 status
= nfserr_inval
;
3923 if (!test_access(od
->od_share_access
, stp
)) {
3924 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3925 stp
->st_access_bmap
, od
->od_share_access
);
3928 if (!test_deny(od
->od_share_deny
, stp
)) {
3929 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3930 stp
->st_deny_bmap
, od
->od_share_deny
);
3933 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3935 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3937 update_stateid(&stp
->st_stid
.sc_stateid
);
3938 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3941 nfsd4_bump_seqid(cstate
, status
);
3942 if (!cstate
->replay_owner
)
3943 nfs4_unlock_state();
3947 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3949 unhash_open_stateid(s
);
3950 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3954 * nfs4_unlock_state() called after encode
3957 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3958 struct nfsd4_close
*close
)
3961 struct nfs4_openowner
*oo
;
3962 struct nfs4_ol_stateid
*stp
;
3963 struct net
*net
= SVC_NET(rqstp
);
3964 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3966 dprintk("NFSD: nfsd4_close on file %.*s\n",
3967 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3968 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3971 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3973 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3975 nfsd4_bump_seqid(cstate
, status
);
3978 oo
= openowner(stp
->st_stateowner
);
3979 update_stateid(&stp
->st_stid
.sc_stateid
);
3980 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3982 nfsd4_close_open_stateid(stp
);
3984 if (cstate
->minorversion
) {
3985 unhash_stid(&stp
->st_stid
);
3986 free_generic_stateid(stp
);
3988 oo
->oo_last_closed_stid
= stp
;
3990 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3991 if (cstate
->minorversion
)
3992 release_openowner(oo
);
3995 * In the 4.0 case we need to keep the owners around a
3996 * little while to handle CLOSE replay.
3998 move_to_close_lru(oo
, SVC_NET(rqstp
));
4002 if (!cstate
->replay_owner
)
4003 nfs4_unlock_state();
4008 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4009 struct nfsd4_delegreturn
*dr
)
4011 struct nfs4_delegation
*dp
;
4012 stateid_t
*stateid
= &dr
->dr_stateid
;
4013 struct nfs4_stid
*s
;
4015 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4017 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4021 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4022 cstate
->minorversion
, nn
);
4025 dp
= delegstateid(s
);
4026 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4030 destroy_delegation(dp
);
4032 nfs4_unlock_state();
4038 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4040 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4043 end_offset(u64 start
, u64 len
)
4048 return end
>= start
? end
: NFS4_MAX_UINT64
;
4051 /* last octet in a range */
4053 last_byte_offset(u64 start
, u64 len
)
4059 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4062 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4064 return (file_hashval(inode
) + cl_id
4065 + opaque_hashval(ownername
->data
, ownername
->len
))
4066 & LOCKOWNER_INO_HASH_MASK
;
4070 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4071 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4072 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4073 * locking, this prevents us from being completely protocol-compliant. The
4074 * real solution to this problem is to start using unsigned file offsets in
4075 * the VFS, but this is a very deep change!
4078 nfs4_transform_lock_offset(struct file_lock
*lock
)
4080 if (lock
->fl_start
< 0)
4081 lock
->fl_start
= OFFSET_MAX
;
4082 if (lock
->fl_end
< 0)
4083 lock
->fl_end
= OFFSET_MAX
;
4086 /* Hack!: For now, we're defining this just so we can use a pointer to it
4087 * as a unique cookie to identify our (NFSv4's) posix locks. */
4088 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4092 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4094 struct nfs4_lockowner
*lo
;
4096 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4097 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4098 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4099 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4100 if (!deny
->ld_owner
.data
)
4101 /* We just don't care that much */
4103 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4104 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4107 deny
->ld_owner
.len
= 0;
4108 deny
->ld_owner
.data
= NULL
;
4109 deny
->ld_clientid
.cl_boot
= 0;
4110 deny
->ld_clientid
.cl_id
= 0;
4112 deny
->ld_start
= fl
->fl_start
;
4113 deny
->ld_length
= NFS4_MAX_UINT64
;
4114 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4115 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4116 deny
->ld_type
= NFS4_READ_LT
;
4117 if (fl
->fl_type
!= F_RDLCK
)
4118 deny
->ld_type
= NFS4_WRITE_LT
;
4121 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4123 struct nfs4_ol_stateid
*lst
;
4125 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4127 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4128 struct nfs4_ol_stateid
, st_perstateowner
);
4129 return lst
->st_file
->fi_inode
== inode
;
4132 static struct nfs4_lockowner
*
4133 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4134 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4136 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4137 struct nfs4_lockowner
*lo
;
4139 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4140 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4146 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4148 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4149 unsigned int inohash
= lockowner_ino_hashval(inode
,
4150 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4151 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4153 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4154 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4155 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4159 * Alloc a lock owner structure.
4160 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4163 * strhashval = ownerstr_hashval
4166 static struct nfs4_lockowner
*
4167 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4168 struct nfs4_lockowner
*lo
;
4170 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4173 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4174 lo
->lo_owner
.so_is_open_owner
= 0;
4175 /* It is the openowner seqid that will be incremented in encode in the
4176 * case of new lockowners; so increment the lock seqid manually: */
4177 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4178 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4182 static struct nfs4_ol_stateid
*
4183 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4185 struct nfs4_ol_stateid
*stp
;
4186 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4188 stp
= nfs4_alloc_stateid(clp
);
4191 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4192 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4193 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4194 stp
->st_stateowner
= &lo
->lo_owner
;
4197 stp
->st_access_bmap
= 0;
4198 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4199 stp
->st_openstp
= open_stp
;
4204 check_lock_length(u64 offset
, u64 length
)
4206 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4207 LOFF_OVERFLOW(offset
, length
)));
4210 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4212 struct nfs4_file
*fp
= lock_stp
->st_file
;
4213 int oflag
= nfs4_access_to_omode(access
);
4215 if (test_access(access
, lock_stp
))
4217 nfs4_file_get_access(fp
, oflag
);
4218 set_access(access
, lock_stp
);
4221 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)
4223 struct nfs4_file
*fi
= ost
->st_file
;
4224 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4225 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4226 struct nfs4_lockowner
*lo
;
4227 unsigned int strhashval
;
4228 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4230 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4231 &lock
->v
.new.owner
, nn
);
4233 if (!cstate
->minorversion
)
4234 return nfserr_bad_seqid
;
4235 /* XXX: a lockowner always has exactly one stateid: */
4236 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4237 struct nfs4_ol_stateid
, st_perstateowner
);
4240 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4241 &lock
->v
.new.owner
);
4242 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4244 return nfserr_jukebox
;
4245 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4247 release_lockowner(lo
);
4248 return nfserr_jukebox
;
4258 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4259 struct nfsd4_lock
*lock
)
4261 struct nfs4_openowner
*open_sop
= NULL
;
4262 struct nfs4_lockowner
*lock_sop
= NULL
;
4263 struct nfs4_ol_stateid
*lock_stp
;
4264 struct file
*filp
= NULL
;
4265 struct file_lock
*file_lock
= NULL
;
4266 struct file_lock
*conflock
= NULL
;
4268 bool new_state
= false;
4271 struct net
*net
= SVC_NET(rqstp
);
4272 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4274 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4275 (long long) lock
->lk_offset
,
4276 (long long) lock
->lk_length
);
4278 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4279 return nfserr_inval
;
4281 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4282 S_IFREG
, NFSD_MAY_LOCK
))) {
4283 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4289 if (lock
->lk_is_new
) {
4290 struct nfs4_ol_stateid
*open_stp
= NULL
;
4292 if (nfsd4_has_session(cstate
))
4293 /* See rfc 5661 18.10.3: given clientid is ignored: */
4294 memcpy(&lock
->v
.new.clientid
,
4295 &cstate
->session
->se_client
->cl_clientid
,
4296 sizeof(clientid_t
));
4298 status
= nfserr_stale_clientid
;
4299 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4302 /* validate and update open stateid and open seqid */
4303 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4304 lock
->lk_new_open_seqid
,
4305 &lock
->lk_new_open_stateid
,
4309 open_sop
= openowner(open_stp
->st_stateowner
);
4310 status
= nfserr_bad_stateid
;
4311 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4312 &lock
->v
.new.clientid
))
4314 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4315 &lock_stp
, &new_state
);
4317 status
= nfs4_preprocess_seqid_op(cstate
,
4318 lock
->lk_old_lock_seqid
,
4319 &lock
->lk_old_lock_stateid
,
4320 NFS4_LOCK_STID
, &lock_stp
, nn
);
4323 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4325 lkflg
= setlkflg(lock
->lk_type
);
4326 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4330 status
= nfserr_grace
;
4331 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4333 status
= nfserr_no_grace
;
4334 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4337 file_lock
= locks_alloc_lock();
4339 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4340 status
= nfserr_jukebox
;
4344 locks_init_lock(file_lock
);
4345 switch (lock
->lk_type
) {
4348 filp
= find_readable_file(lock_stp
->st_file
);
4350 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4351 file_lock
->fl_type
= F_RDLCK
;
4354 case NFS4_WRITEW_LT
:
4355 filp
= find_writeable_file(lock_stp
->st_file
);
4357 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4358 file_lock
->fl_type
= F_WRLCK
;
4361 status
= nfserr_inval
;
4365 status
= nfserr_openmode
;
4368 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4369 file_lock
->fl_pid
= current
->tgid
;
4370 file_lock
->fl_file
= filp
;
4371 file_lock
->fl_flags
= FL_POSIX
;
4372 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4373 file_lock
->fl_start
= lock
->lk_offset
;
4374 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4375 nfs4_transform_lock_offset(file_lock
);
4377 conflock
= locks_alloc_lock();
4379 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4380 status
= nfserr_jukebox
;
4384 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4386 case 0: /* success! */
4387 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4388 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4392 case (EAGAIN
): /* conflock holds conflicting lock */
4393 status
= nfserr_denied
;
4394 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4395 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4398 status
= nfserr_deadlock
;
4401 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4402 status
= nfserrno(err
);
4406 if (status
&& new_state
)
4407 release_lockowner(lock_sop
);
4408 nfsd4_bump_seqid(cstate
, status
);
4409 if (!cstate
->replay_owner
)
4410 nfs4_unlock_state();
4412 locks_free_lock(file_lock
);
4414 locks_free_lock(conflock
);
4419 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4420 * so we do a temporary open here just to get an open file to pass to
4421 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4424 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4427 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4429 err
= nfserrno(vfs_test_lock(file
, lock
));
4439 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4440 struct nfsd4_lockt
*lockt
)
4442 struct inode
*inode
;
4443 struct file_lock
*file_lock
= NULL
;
4444 struct nfs4_lockowner
*lo
;
4446 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4448 if (locks_in_grace(SVC_NET(rqstp
)))
4449 return nfserr_grace
;
4451 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4452 return nfserr_inval
;
4456 if (!nfsd4_has_session(cstate
)) {
4457 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4462 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4465 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4466 file_lock
= locks_alloc_lock();
4468 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4469 status
= nfserr_jukebox
;
4472 locks_init_lock(file_lock
);
4473 switch (lockt
->lt_type
) {
4476 file_lock
->fl_type
= F_RDLCK
;
4479 case NFS4_WRITEW_LT
:
4480 file_lock
->fl_type
= F_WRLCK
;
4483 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4484 status
= nfserr_inval
;
4488 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4490 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4491 file_lock
->fl_pid
= current
->tgid
;
4492 file_lock
->fl_flags
= FL_POSIX
;
4494 file_lock
->fl_start
= lockt
->lt_offset
;
4495 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4497 nfs4_transform_lock_offset(file_lock
);
4499 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4503 if (file_lock
->fl_type
!= F_UNLCK
) {
4504 status
= nfserr_denied
;
4505 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4508 nfs4_unlock_state();
4510 locks_free_lock(file_lock
);
4515 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4516 struct nfsd4_locku
*locku
)
4518 struct nfs4_lockowner
*lo
;
4519 struct nfs4_ol_stateid
*stp
;
4520 struct file
*filp
= NULL
;
4521 struct file_lock
*file_lock
= NULL
;
4524 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4526 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4527 (long long) locku
->lu_offset
,
4528 (long long) locku
->lu_length
);
4530 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4531 return nfserr_inval
;
4535 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4536 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4540 filp
= find_any_file(stp
->st_file
);
4542 status
= nfserr_lock_range
;
4545 file_lock
= locks_alloc_lock();
4547 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4548 status
= nfserr_jukebox
;
4551 lo
= lockowner(stp
->st_stateowner
);
4552 locks_init_lock(file_lock
);
4553 file_lock
->fl_type
= F_UNLCK
;
4554 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4555 file_lock
->fl_pid
= current
->tgid
;
4556 file_lock
->fl_file
= filp
;
4557 file_lock
->fl_flags
= FL_POSIX
;
4558 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4559 file_lock
->fl_start
= locku
->lu_offset
;
4561 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4563 nfs4_transform_lock_offset(file_lock
);
4565 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4567 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4570 update_stateid(&stp
->st_stid
.sc_stateid
);
4571 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4573 if (nfsd4_has_session(cstate
) && !check_for_locks(stp
->st_file
, lo
)) {
4574 WARN_ON_ONCE(cstate
->replay_owner
);
4575 release_lockowner(lo
);
4579 nfsd4_bump_seqid(cstate
, status
);
4580 if (!cstate
->replay_owner
)
4581 nfs4_unlock_state();
4583 locks_free_lock(file_lock
);
4587 status
= nfserrno(err
);
4593 * 1: locks held by lockowner
4594 * 0: no locks held by lockowner
4597 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4599 struct file_lock
**flpp
;
4600 struct inode
*inode
= filp
->fi_inode
;
4604 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4605 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4616 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4617 struct nfsd4_compound_state
*cstate
,
4618 struct nfsd4_release_lockowner
*rlockowner
)
4620 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4621 struct nfs4_stateowner
*sop
;
4622 struct nfs4_lockowner
*lo
;
4623 struct nfs4_ol_stateid
*stp
;
4624 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4625 struct list_head matches
;
4626 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4628 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4630 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4631 clid
->cl_boot
, clid
->cl_id
);
4635 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4639 status
= nfserr_locks_held
;
4640 INIT_LIST_HEAD(&matches
);
4642 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4643 if (sop
->so_is_open_owner
)
4645 if (!same_owner_str(sop
, owner
, clid
))
4647 list_for_each_entry(stp
, &sop
->so_stateids
,
4649 lo
= lockowner(sop
);
4650 if (check_for_locks(stp
->st_file
, lo
))
4652 list_add(&lo
->lo_list
, &matches
);
4655 /* Clients probably won't expect us to return with some (but not all)
4656 * of the lockowner state released; so don't release any until all
4657 * have been checked. */
4659 while (!list_empty(&matches
)) {
4660 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4662 /* unhash_stateowner deletes so_perclient only
4663 * for openowners. */
4664 list_del(&lo
->lo_list
);
4665 release_lockowner(lo
);
4668 nfs4_unlock_state();
4672 static inline struct nfs4_client_reclaim
*
4675 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4679 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4681 struct nfs4_client_reclaim
*crp
;
4683 crp
= nfsd4_find_reclaim_client(name
, nn
);
4684 return (crp
&& crp
->cr_clp
);
4688 * failure => all reset bets are off, nfserr_no_grace...
4690 struct nfs4_client_reclaim
*
4691 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4693 unsigned int strhashval
;
4694 struct nfs4_client_reclaim
*crp
;
4696 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4697 crp
= alloc_reclaim();
4699 strhashval
= clientstr_hashval(name
);
4700 INIT_LIST_HEAD(&crp
->cr_strhash
);
4701 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4702 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4704 nn
->reclaim_str_hashtbl_size
++;
4710 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4712 list_del(&crp
->cr_strhash
);
4714 nn
->reclaim_str_hashtbl_size
--;
4718 nfs4_release_reclaim(struct nfsd_net
*nn
)
4720 struct nfs4_client_reclaim
*crp
= NULL
;
4723 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4724 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4725 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4726 struct nfs4_client_reclaim
, cr_strhash
);
4727 nfs4_remove_reclaim_record(crp
, nn
);
4730 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4734 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4735 struct nfs4_client_reclaim
*
4736 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4738 unsigned int strhashval
;
4739 struct nfs4_client_reclaim
*crp
= NULL
;
4741 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4743 strhashval
= clientstr_hashval(recdir
);
4744 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4745 if (same_name(crp
->cr_recdir
, recdir
)) {
4753 * Called from OPEN. Look for clientid in reclaim list.
4756 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4758 struct nfs4_client
*clp
;
4760 /* find clientid in conf_id_hashtbl */
4761 clp
= find_confirmed_client(clid
, sessions
, nn
);
4763 return nfserr_reclaim_bad
;
4765 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4768 #ifdef CONFIG_NFSD_FAULT_INJECTION
4770 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4772 if (mark_client_expired(clp
))
4778 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4780 char buf
[INET6_ADDRSTRLEN
];
4781 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4782 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4786 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4789 char buf
[INET6_ADDRSTRLEN
];
4790 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4791 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4794 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4796 struct nfs4_openowner
*oop
;
4797 struct nfs4_lockowner
*lop
, *lo_next
;
4798 struct nfs4_ol_stateid
*stp
, *st_next
;
4801 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4802 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4803 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4815 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4817 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4820 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4822 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4823 nfsd_print_count(clp
, count
, "locked files");
4827 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4829 struct nfs4_openowner
*oop
, *next
;
4832 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4842 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4844 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4847 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4849 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4850 nfsd_print_count(clp
, count
, "open files");
4854 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4855 struct list_head
*victims
)
4857 struct nfs4_delegation
*dp
, *next
;
4860 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4862 list_move(&dp
->dl_recall_lru
, victims
);
4869 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4871 struct nfs4_delegation
*dp
, *next
;
4875 spin_lock(&recall_lock
);
4876 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4877 spin_unlock(&recall_lock
);
4879 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4880 revoke_delegation(dp
);
4885 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4887 struct nfs4_delegation
*dp
, *next
;
4891 spin_lock(&recall_lock
);
4892 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4893 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4894 nfsd_break_one_deleg(dp
);
4895 spin_unlock(&recall_lock
);
4900 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4904 spin_lock(&recall_lock
);
4905 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4906 spin_unlock(&recall_lock
);
4908 nfsd_print_count(clp
, count
, "delegations");
4912 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4914 struct nfs4_client
*clp
, *next
;
4916 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4918 if (!nfsd_netns_ready(nn
))
4921 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4922 count
+= func(clp
, max
- count
);
4923 if ((max
!= 0) && (count
>= max
))
4930 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4932 struct nfs4_client
*clp
;
4933 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4935 if (!nfsd_netns_ready(nn
))
4938 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4939 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4945 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4947 /* initialization to perform at module load time: */
4950 nfs4_state_init(void)
4955 * Since the lifetime of a delegation isn't limited to that of an open, a
4956 * client may quite reasonably hang on to a delegation as long as it has
4957 * the inode cached. This becomes an obvious problem the first time a
4958 * client's inode cache approaches the size of the server's total memory.
4960 * For now we avoid this problem by imposing a hard limit on the number
4961 * of delegations, which varies according to the server's memory size.
4964 set_max_delegations(void)
4967 * Allow at most 4 delegations per megabyte of RAM. Quick
4968 * estimates suggest that in the worst case (where every delegation
4969 * is for a different inode), a delegation could take about 1.5K,
4970 * giving a worst case usage of about 6% of memory.
4972 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4975 static int nfs4_state_create_net(struct net
*net
)
4977 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4980 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4981 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4982 if (!nn
->conf_id_hashtbl
)
4984 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4985 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4986 if (!nn
->unconf_id_hashtbl
)
4988 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4989 OWNER_HASH_SIZE
, GFP_KERNEL
);
4990 if (!nn
->ownerstr_hashtbl
)
4992 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4993 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4994 if (!nn
->lockowner_ino_hashtbl
)
4995 goto err_lockowner_ino
;
4996 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4997 SESSION_HASH_SIZE
, GFP_KERNEL
);
4998 if (!nn
->sessionid_hashtbl
)
5001 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5002 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5003 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5005 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5006 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5007 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5008 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5009 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5010 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5011 nn
->conf_name_tree
= RB_ROOT
;
5012 nn
->unconf_name_tree
= RB_ROOT
;
5013 INIT_LIST_HEAD(&nn
->client_lru
);
5014 INIT_LIST_HEAD(&nn
->close_lru
);
5015 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5016 spin_lock_init(&nn
->client_lock
);
5018 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5024 kfree(nn
->lockowner_ino_hashtbl
);
5026 kfree(nn
->ownerstr_hashtbl
);
5028 kfree(nn
->unconf_id_hashtbl
);
5030 kfree(nn
->conf_id_hashtbl
);
5036 nfs4_state_destroy_net(struct net
*net
)
5039 struct nfs4_client
*clp
= NULL
;
5040 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5041 struct rb_node
*node
, *tmp
;
5043 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5044 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5045 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5046 destroy_client(clp
);
5050 node
= rb_first(&nn
->unconf_name_tree
);
5051 while (node
!= NULL
) {
5053 node
= rb_next(tmp
);
5054 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
5055 rb_erase(tmp
, &nn
->unconf_name_tree
);
5056 destroy_client(clp
);
5059 kfree(nn
->sessionid_hashtbl
);
5060 kfree(nn
->lockowner_ino_hashtbl
);
5061 kfree(nn
->ownerstr_hashtbl
);
5062 kfree(nn
->unconf_id_hashtbl
);
5063 kfree(nn
->conf_id_hashtbl
);
5068 nfs4_state_start_net(struct net
*net
)
5070 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5073 ret
= nfs4_state_create_net(net
);
5076 nfsd4_client_tracking_init(net
);
5077 nn
->boot_time
= get_seconds();
5078 locks_start_grace(net
, &nn
->nfsd4_manager
);
5079 nn
->grace_ended
= false;
5080 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5081 nn
->nfsd4_grace
, net
);
5082 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5086 /* initialization to perform when the nfsd service is started: */
5089 nfs4_state_start(void)
5093 ret
= set_callback_cred();
5096 laundry_wq
= create_singlethread_workqueue("nfsd4");
5097 if (laundry_wq
== NULL
) {
5101 ret
= nfsd4_create_callback_queue();
5103 goto out_free_laundry
;
5105 set_max_delegations();
5110 destroy_workqueue(laundry_wq
);
5115 /* should be called with the state lock held */
5117 nfs4_state_shutdown_net(struct net
*net
)
5119 struct nfs4_delegation
*dp
= NULL
;
5120 struct list_head
*pos
, *next
, reaplist
;
5121 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5123 cancel_delayed_work_sync(&nn
->laundromat_work
);
5124 locks_end_grace(&nn
->nfsd4_manager
);
5126 INIT_LIST_HEAD(&reaplist
);
5127 spin_lock(&recall_lock
);
5128 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5129 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5130 list_move(&dp
->dl_recall_lru
, &reaplist
);
5132 spin_unlock(&recall_lock
);
5133 list_for_each_safe(pos
, next
, &reaplist
) {
5134 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5135 destroy_delegation(dp
);
5138 nfsd4_client_tracking_exit(net
);
5139 nfs4_state_destroy_net(net
);
5143 nfs4_state_shutdown(void)
5145 destroy_workqueue(laundry_wq
);
5146 nfsd4_destroy_callback_queue();
5150 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5152 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5153 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5157 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5159 if (cstate
->minorversion
) {
5160 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5161 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5166 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5168 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5172 * functions to set current state id
5175 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5177 put_stateid(cstate
, &odp
->od_stateid
);
5181 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5183 put_stateid(cstate
, &open
->op_stateid
);
5187 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5189 put_stateid(cstate
, &close
->cl_stateid
);
5193 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5195 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5199 * functions to consume current state id
5203 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5205 get_stateid(cstate
, &odp
->od_stateid
);
5209 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5211 get_stateid(cstate
, &drp
->dr_stateid
);
5215 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5217 get_stateid(cstate
, &fsp
->fr_stateid
);
5221 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5223 get_stateid(cstate
, &setattr
->sa_stateid
);
5227 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5229 get_stateid(cstate
, &close
->cl_stateid
);
5233 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5235 get_stateid(cstate
, &locku
->lu_stateid
);
5239 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5241 get_stateid(cstate
, &read
->rd_stateid
);
5245 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5247 get_stateid(cstate
, &write
->wr_stateid
);