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>
46 #include "current_stateid.h"
50 #define NFSDDBG_FACILITY NFSDDBG_PROC
52 #define all_ones {{~0,~0},~0}
53 static const stateid_t one_stateid
= {
55 .si_opaque
= all_ones
,
57 static const stateid_t zero_stateid
= {
60 static const stateid_t currentstateid
= {
64 static u64 current_sessionid
= 1;
66 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
67 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
68 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
75 /* Currently used for almost all code touching nfsv4 state: */
76 static DEFINE_MUTEX(client_mutex
);
79 * Currently used for the del_recall_lru and file hash table. In an
80 * effort to decrease the scope of the client_mutex, this spinlock may
81 * eventually cover more:
83 static DEFINE_SPINLOCK(recall_lock
);
85 static struct kmem_cache
*openowner_slab
= NULL
;
86 static struct kmem_cache
*lockowner_slab
= NULL
;
87 static struct kmem_cache
*file_slab
= NULL
;
88 static struct kmem_cache
*stateid_slab
= NULL
;
89 static struct kmem_cache
*deleg_slab
= NULL
;
94 mutex_lock(&client_mutex
);
97 static void free_session(struct nfsd4_session
*);
99 void nfsd4_put_session(struct nfsd4_session
*ses
)
101 atomic_dec(&ses
->se_ref
);
104 static bool is_session_dead(struct nfsd4_session
*ses
)
106 return ses
->se_flags
& NFS4_SESSION_DEAD
;
109 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
)
111 if (atomic_read(&ses
->se_ref
))
112 return nfserr_jukebox
;
113 ses
->se_flags
|= NFS4_SESSION_DEAD
;
117 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
119 if (is_session_dead(ses
))
120 return nfserr_badsession
;
121 atomic_inc(&ses
->se_ref
);
126 nfs4_unlock_state(void)
128 mutex_unlock(&client_mutex
);
131 static bool is_client_expired(struct nfs4_client
*clp
)
133 return clp
->cl_time
== 0;
136 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
138 if (atomic_read(&clp
->cl_refcount
))
139 return nfserr_jukebox
;
144 static __be32
mark_client_expired(struct nfs4_client
*clp
)
146 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
149 spin_lock(&nn
->client_lock
);
150 ret
= mark_client_expired_locked(clp
);
151 spin_unlock(&nn
->client_lock
);
155 static __be32
get_client_locked(struct nfs4_client
*clp
)
157 if (is_client_expired(clp
))
158 return nfserr_expired
;
159 atomic_inc(&clp
->cl_refcount
);
163 /* must be called under the client_lock */
165 renew_client_locked(struct nfs4_client
*clp
)
167 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
169 if (is_client_expired(clp
)) {
171 printk("%s: client (clientid %08x/%08x) already expired\n",
173 clp
->cl_clientid
.cl_boot
,
174 clp
->cl_clientid
.cl_id
);
178 dprintk("renewing client (clientid %08x/%08x)\n",
179 clp
->cl_clientid
.cl_boot
,
180 clp
->cl_clientid
.cl_id
);
181 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
182 clp
->cl_time
= get_seconds();
186 renew_client(struct nfs4_client
*clp
)
188 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
190 spin_lock(&nn
->client_lock
);
191 renew_client_locked(clp
);
192 spin_unlock(&nn
->client_lock
);
195 void put_client_renew_locked(struct nfs4_client
*clp
)
197 if (!atomic_dec_and_test(&clp
->cl_refcount
))
199 if (!is_client_expired(clp
))
200 renew_client_locked(clp
);
203 void put_client_renew(struct nfs4_client
*clp
)
205 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
207 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
209 if (!is_client_expired(clp
))
210 renew_client_locked(clp
);
211 spin_unlock(&nn
->client_lock
);
216 opaque_hashval(const void *ptr
, int nbytes
)
218 unsigned char *cptr
= (unsigned char *) ptr
;
228 static void nfsd4_free_file(struct nfs4_file
*f
)
230 kmem_cache_free(file_slab
, f
);
234 put_nfs4_file(struct nfs4_file
*fi
)
236 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
237 hlist_del(&fi
->fi_hash
);
238 spin_unlock(&recall_lock
);
245 get_nfs4_file(struct nfs4_file
*fi
)
247 atomic_inc(&fi
->fi_ref
);
250 static int num_delegations
;
251 unsigned long max_delegations
;
254 * Open owner state (share locks)
257 /* hash tables for lock and open owners */
258 #define OWNER_HASH_BITS 8
259 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
260 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
262 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
266 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
268 return ret
& OWNER_HASH_MASK
;
271 /* hash table for nfs4_file */
272 #define FILE_HASH_BITS 8
273 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
275 static unsigned int file_hashval(struct inode
*ino
)
277 /* XXX: why are we hashing on inode pointer, anyway? */
278 return hash_ptr(ino
, FILE_HASH_BITS
);
281 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
283 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
285 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
286 atomic_inc(&fp
->fi_access
[oflag
]);
289 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
291 if (oflag
== O_RDWR
) {
292 __nfs4_file_get_access(fp
, O_RDONLY
);
293 __nfs4_file_get_access(fp
, O_WRONLY
);
295 __nfs4_file_get_access(fp
, oflag
);
298 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
300 if (fp
->fi_fds
[oflag
]) {
301 fput(fp
->fi_fds
[oflag
]);
302 fp
->fi_fds
[oflag
] = NULL
;
306 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
308 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
309 nfs4_file_put_fd(fp
, oflag
);
311 * It's also safe to get rid of the RDWR open *if*
312 * we no longer have need of the other kind of access
313 * or if we already have the other kind of open:
315 if (fp
->fi_fds
[1-oflag
]
316 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
317 nfs4_file_put_fd(fp
, O_RDWR
);
321 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
323 if (oflag
== O_RDWR
) {
324 __nfs4_file_put_access(fp
, O_RDONLY
);
325 __nfs4_file_put_access(fp
, O_WRONLY
);
327 __nfs4_file_put_access(fp
, oflag
);
330 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
333 struct idr
*stateids
= &cl
->cl_stateids
;
334 static int min_stateid
= 0;
335 struct nfs4_stid
*stid
;
338 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
342 new_id
= idr_alloc(stateids
, stid
, min_stateid
, 0, GFP_KERNEL
);
345 stid
->sc_client
= cl
;
347 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
348 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
349 /* Will be incremented before return to client: */
350 stid
->sc_stateid
.si_generation
= 0;
353 * It shouldn't be a problem to reuse an opaque stateid value.
354 * I don't think it is for 4.1. But with 4.0 I worry that, for
355 * example, a stray write retransmission could be accepted by
356 * the server when it should have been rejected. Therefore,
357 * adopt a trick from the sctp code to attempt to maximize the
358 * amount of time until an id is reused, by ensuring they always
359 * "increase" (mod INT_MAX):
362 min_stateid
= new_id
+1;
363 if (min_stateid
== INT_MAX
)
371 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
373 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
376 static struct nfs4_delegation
*
377 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
379 struct nfs4_delegation
*dp
;
380 struct nfs4_file
*fp
= stp
->st_file
;
382 dprintk("NFSD alloc_init_deleg\n");
384 * Major work on the lease subsystem (for example, to support
385 * calbacks on stat) will be required before we can support
386 * write delegations properly.
388 if (type
!= NFS4_OPEN_DELEGATE_READ
)
390 if (fp
->fi_had_conflict
)
392 if (num_delegations
> max_delegations
)
394 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
397 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
399 * delegation seqid's are never incremented. The 4.1 special
400 * meaning of seqid 0 isn't meaningful, really, but let's avoid
401 * 0 anyway just for consistency and use 1:
403 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
405 INIT_LIST_HEAD(&dp
->dl_perfile
);
406 INIT_LIST_HEAD(&dp
->dl_perclnt
);
407 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
411 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
413 atomic_set(&dp
->dl_count
, 1);
414 nfsd4_init_callback(&dp
->dl_recall
);
418 static void remove_stid(struct nfs4_stid
*s
)
420 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
422 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
426 nfs4_put_delegation(struct nfs4_delegation
*dp
)
428 if (atomic_dec_and_test(&dp
->dl_count
)) {
429 kmem_cache_free(deleg_slab
, dp
);
434 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
436 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
437 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
439 fput(fp
->fi_deleg_file
);
440 fp
->fi_deleg_file
= NULL
;
444 static void unhash_stid(struct nfs4_stid
*s
)
449 /* Called under the state lock. */
451 unhash_delegation(struct nfs4_delegation
*dp
)
453 unhash_stid(&dp
->dl_stid
);
454 list_del_init(&dp
->dl_perclnt
);
455 spin_lock(&recall_lock
);
456 list_del_init(&dp
->dl_perfile
);
457 list_del_init(&dp
->dl_recall_lru
);
458 spin_unlock(&recall_lock
);
459 nfs4_put_deleg_lease(dp
->dl_file
);
460 put_nfs4_file(dp
->dl_file
);
462 remove_stid(&dp
->dl_stid
);
463 nfs4_put_delegation(dp
);
470 static unsigned int clientid_hashval(u32 id
)
472 return id
& CLIENT_HASH_MASK
;
475 static unsigned int clientstr_hashval(const char *name
)
477 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
481 * We store the NONE, READ, WRITE, and BOTH bits separately in the
482 * st_{access,deny}_bmap field of the stateid, in order to track not
483 * only what share bits are currently in force, but also what
484 * combinations of share bits previous opens have used. This allows us
485 * to enforce the recommendation of rfc 3530 14.2.19 that the server
486 * return an error if the client attempt to downgrade to a combination
487 * of share bits not explicable by closing some of its previous opens.
489 * XXX: This enforcement is actually incomplete, since we don't keep
490 * track of access/deny bit combinations; so, e.g., we allow:
492 * OPEN allow read, deny write
493 * OPEN allow both, deny none
494 * DOWNGRADE allow read, deny none
496 * which we should reject.
499 bmap_to_share_mode(unsigned long bmap
) {
501 unsigned int access
= 0;
503 for (i
= 1; i
< 4; i
++) {
504 if (test_bit(i
, &bmap
))
511 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
512 unsigned int access
, deny
;
514 access
= bmap_to_share_mode(stp
->st_access_bmap
);
515 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
516 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
521 /* set share access for a given stateid */
523 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
525 __set_bit(access
, &stp
->st_access_bmap
);
528 /* clear share access for a given stateid */
530 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
532 __clear_bit(access
, &stp
->st_access_bmap
);
535 /* test whether a given stateid has access */
537 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
539 return test_bit(access
, &stp
->st_access_bmap
);
542 /* set share deny for a given stateid */
544 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
546 __set_bit(access
, &stp
->st_deny_bmap
);
549 /* clear share deny for a given stateid */
551 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
553 __clear_bit(access
, &stp
->st_deny_bmap
);
556 /* test whether a given stateid is denying specific access */
558 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
560 return test_bit(access
, &stp
->st_deny_bmap
);
563 static int nfs4_access_to_omode(u32 access
)
565 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
566 case NFS4_SHARE_ACCESS_READ
:
568 case NFS4_SHARE_ACCESS_WRITE
:
570 case NFS4_SHARE_ACCESS_BOTH
:
577 /* release all access and file references for a given stateid */
579 release_all_access(struct nfs4_ol_stateid
*stp
)
583 for (i
= 1; i
< 4; i
++) {
584 if (test_access(i
, stp
))
585 nfs4_file_put_access(stp
->st_file
,
586 nfs4_access_to_omode(i
));
587 clear_access(i
, stp
);
591 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
593 list_del(&stp
->st_perfile
);
594 list_del(&stp
->st_perstateowner
);
597 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
599 release_all_access(stp
);
600 put_nfs4_file(stp
->st_file
);
604 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
606 remove_stid(&stp
->st_stid
);
607 kmem_cache_free(stateid_slab
, stp
);
610 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
614 unhash_generic_stateid(stp
);
615 unhash_stid(&stp
->st_stid
);
616 file
= find_any_file(stp
->st_file
);
618 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
619 close_generic_stateid(stp
);
620 free_generic_stateid(stp
);
623 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
625 struct nfs4_ol_stateid
*stp
;
627 list_del(&lo
->lo_owner
.so_strhash
);
628 list_del(&lo
->lo_perstateid
);
629 list_del(&lo
->lo_owner_ino_hash
);
630 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
631 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
632 struct nfs4_ol_stateid
, st_perstateowner
);
633 release_lock_stateid(stp
);
637 static void release_lockowner(struct nfs4_lockowner
*lo
)
639 unhash_lockowner(lo
);
640 nfs4_free_lockowner(lo
);
644 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
646 struct nfs4_lockowner
*lo
;
648 while (!list_empty(&open_stp
->st_lockowners
)) {
649 lo
= list_entry(open_stp
->st_lockowners
.next
,
650 struct nfs4_lockowner
, lo_perstateid
);
651 release_lockowner(lo
);
655 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
657 unhash_generic_stateid(stp
);
658 release_stateid_lockowners(stp
);
659 close_generic_stateid(stp
);
662 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
664 unhash_open_stateid(stp
);
665 unhash_stid(&stp
->st_stid
);
666 free_generic_stateid(stp
);
669 static void unhash_openowner(struct nfs4_openowner
*oo
)
671 struct nfs4_ol_stateid
*stp
;
673 list_del(&oo
->oo_owner
.so_strhash
);
674 list_del(&oo
->oo_perclient
);
675 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
676 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
677 struct nfs4_ol_stateid
, st_perstateowner
);
678 release_open_stateid(stp
);
682 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
684 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
687 unhash_stid(&s
->st_stid
);
688 free_generic_stateid(s
);
689 oo
->oo_last_closed_stid
= NULL
;
693 static void release_openowner(struct nfs4_openowner
*oo
)
695 unhash_openowner(oo
);
696 list_del(&oo
->oo_close_lru
);
697 release_last_closed_stateid(oo
);
698 nfs4_free_openowner(oo
);
702 hash_sessionid(struct nfs4_sessionid
*sessionid
)
704 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
706 return sid
->sequence
% SESSION_HASH_SIZE
;
711 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
713 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
714 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
718 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
725 gen_sessionid(struct nfsd4_session
*ses
)
727 struct nfs4_client
*clp
= ses
->se_client
;
728 struct nfsd4_sessionid
*sid
;
730 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
731 sid
->clientid
= clp
->cl_clientid
;
732 sid
->sequence
= current_sessionid
++;
737 * The protocol defines ca_maxresponssize_cached to include the size of
738 * the rpc header, but all we need to cache is the data starting after
739 * the end of the initial SEQUENCE operation--the rest we regenerate
740 * each time. Therefore we can advertise a ca_maxresponssize_cached
741 * value that is the number of bytes in our cache plus a few additional
742 * bytes. In order to stay on the safe side, and not promise more than
743 * we can cache, those additional bytes must be the minimum possible: 24
744 * bytes of rpc header (xid through accept state, with AUTH_NULL
745 * verifier), 12 for the compound header (with zero-length tag), and 44
746 * for the SEQUENCE op response:
748 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
751 free_session_slots(struct nfsd4_session
*ses
)
755 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
756 kfree(ses
->se_slots
[i
]);
760 * We don't actually need to cache the rpc and session headers, so we
761 * can allocate a little less for each slot:
763 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
765 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
768 static int nfsd4_sanitize_slot_size(u32 size
)
770 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
771 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
777 * XXX: If we run out of reserved DRC memory we could (up to a point)
778 * re-negotiate active sessions and reduce their slot usage to make
779 * room for new connections. For now we just fail the create session.
781 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
785 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
787 spin_lock(&nfsd_drc_lock
);
788 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
789 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
790 num
= min_t(int, num
, avail
/ slotsize
);
791 nfsd_drc_mem_used
+= num
* slotsize
;
792 spin_unlock(&nfsd_drc_lock
);
797 static void nfsd4_put_drc_mem(int slotsize
, int num
)
799 spin_lock(&nfsd_drc_lock
);
800 nfsd_drc_mem_used
-= slotsize
* num
;
801 spin_unlock(&nfsd_drc_lock
);
804 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
806 struct nfsd4_session
*new;
809 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
810 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
811 mem
= numslots
* sizeof(struct nfsd4_slot
*);
813 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
816 /* allocate each struct nfsd4_slot and data cache in one piece */
817 for (i
= 0; i
< numslots
; i
++) {
818 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
819 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
820 if (!new->se_slots
[i
])
826 kfree(new->se_slots
[i
]);
831 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new,
832 struct nfsd4_channel_attrs
*req
,
833 int numslots
, int slotsize
,
836 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
838 new->maxreqs
= numslots
;
839 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
840 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
841 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
842 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
843 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
846 static void free_conn(struct nfsd4_conn
*c
)
848 svc_xprt_put(c
->cn_xprt
);
852 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
854 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
855 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
857 spin_lock(&clp
->cl_lock
);
858 if (!list_empty(&c
->cn_persession
)) {
859 list_del(&c
->cn_persession
);
862 nfsd4_probe_callback(clp
);
863 spin_unlock(&clp
->cl_lock
);
866 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
868 struct nfsd4_conn
*conn
;
870 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
873 svc_xprt_get(rqstp
->rq_xprt
);
874 conn
->cn_xprt
= rqstp
->rq_xprt
;
875 conn
->cn_flags
= flags
;
876 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
880 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
882 conn
->cn_session
= ses
;
883 list_add(&conn
->cn_persession
, &ses
->se_conns
);
886 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
888 struct nfs4_client
*clp
= ses
->se_client
;
890 spin_lock(&clp
->cl_lock
);
891 __nfsd4_hash_conn(conn
, ses
);
892 spin_unlock(&clp
->cl_lock
);
895 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
897 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
898 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
901 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
905 nfsd4_hash_conn(conn
, ses
);
906 ret
= nfsd4_register_conn(conn
);
908 /* oops; xprt is already down: */
909 nfsd4_conn_lost(&conn
->cn_xpt_user
);
910 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
911 /* callback channel may be back up */
912 nfsd4_probe_callback(ses
->se_client
);
916 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
918 u32 dir
= NFS4_CDFC4_FORE
;
920 if (cses
->flags
& SESSION4_BACK_CHAN
)
921 dir
|= NFS4_CDFC4_BACK
;
922 return alloc_conn(rqstp
, dir
);
925 /* must be called under client_lock */
926 static void nfsd4_del_conns(struct nfsd4_session
*s
)
928 struct nfs4_client
*clp
= s
->se_client
;
929 struct nfsd4_conn
*c
;
931 spin_lock(&clp
->cl_lock
);
932 while (!list_empty(&s
->se_conns
)) {
933 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
934 list_del_init(&c
->cn_persession
);
935 spin_unlock(&clp
->cl_lock
);
937 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
940 spin_lock(&clp
->cl_lock
);
942 spin_unlock(&clp
->cl_lock
);
945 static void __free_session(struct nfsd4_session
*ses
)
947 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
948 free_session_slots(ses
);
952 static void free_session(struct nfsd4_session
*ses
)
954 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
956 lockdep_assert_held(&nn
->client_lock
);
957 nfsd4_del_conns(ses
);
961 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
,
964 struct nfsd4_session
*new;
965 int numslots
, slotsize
;
967 * Note decreasing slot size below client's request may
968 * make it difficult for client to function correctly, whereas
969 * decreasing the number of slots will (just?) affect
970 * performance. When short on memory we therefore prefer to
971 * decrease number of slots instead of their size.
973 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
974 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
978 new = __alloc_session(slotsize
, numslots
);
980 nfsd4_put_drc_mem(slotsize
, numslots
);
983 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
, nn
);
987 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
990 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
992 new->se_client
= clp
;
995 INIT_LIST_HEAD(&new->se_conns
);
997 new->se_cb_seq_nr
= 1;
998 new->se_flags
= cses
->flags
;
999 new->se_cb_prog
= cses
->callback_prog
;
1000 new->se_cb_sec
= cses
->cb_sec
;
1001 atomic_set(&new->se_ref
, 0);
1002 idx
= hash_sessionid(&new->se_sessionid
);
1003 spin_lock(&nn
->client_lock
);
1004 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1005 spin_lock(&clp
->cl_lock
);
1006 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1007 spin_unlock(&clp
->cl_lock
);
1008 spin_unlock(&nn
->client_lock
);
1010 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1011 struct sockaddr
*sa
= svc_addr(rqstp
);
1013 * This is a little silly; with sessions there's no real
1014 * use for the callback address. Use the peer address
1015 * as a reasonable default for now, but consider fixing
1016 * the rpc client not to require an address in the
1019 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1020 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1024 /* caller must hold client_lock */
1025 static struct nfsd4_session
*
1026 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1028 struct nfsd4_session
*elem
;
1030 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1032 dump_sessionid(__func__
, sessionid
);
1033 idx
= hash_sessionid(sessionid
);
1034 /* Search in the appropriate list */
1035 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1036 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1037 NFS4_MAX_SESSIONID_LEN
)) {
1042 dprintk("%s: session not found\n", __func__
);
1046 /* caller must hold client_lock */
1048 unhash_session(struct nfsd4_session
*ses
)
1050 list_del(&ses
->se_hash
);
1051 spin_lock(&ses
->se_client
->cl_lock
);
1052 list_del(&ses
->se_perclnt
);
1053 spin_unlock(&ses
->se_client
->cl_lock
);
1056 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1058 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1060 if (clid
->cl_boot
== nn
->boot_time
)
1062 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1063 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1068 * XXX Should we use a slab cache ?
1069 * This type of memory management is somewhat inefficient, but we use it
1070 * anyway since SETCLIENTID is not a common operation.
1072 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1074 struct nfs4_client
*clp
;
1076 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1079 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1080 if (clp
->cl_name
.data
== NULL
) {
1084 clp
->cl_name
.len
= name
.len
;
1089 free_client(struct nfs4_client
*clp
)
1091 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1093 lockdep_assert_held(&nn
->client_lock
);
1094 while (!list_empty(&clp
->cl_sessions
)) {
1095 struct nfsd4_session
*ses
;
1096 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1098 list_del(&ses
->se_perclnt
);
1099 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1102 free_svc_cred(&clp
->cl_cred
);
1103 kfree(clp
->cl_name
.data
);
1104 idr_destroy(&clp
->cl_stateids
);
1108 /* must be called under the client_lock */
1110 unhash_client_locked(struct nfs4_client
*clp
)
1112 struct nfsd4_session
*ses
;
1114 list_del(&clp
->cl_lru
);
1115 spin_lock(&clp
->cl_lock
);
1116 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1117 list_del_init(&ses
->se_hash
);
1118 spin_unlock(&clp
->cl_lock
);
1122 destroy_client(struct nfs4_client
*clp
)
1124 struct nfs4_openowner
*oo
;
1125 struct nfs4_delegation
*dp
;
1126 struct list_head reaplist
;
1127 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1129 INIT_LIST_HEAD(&reaplist
);
1130 spin_lock(&recall_lock
);
1131 while (!list_empty(&clp
->cl_delegations
)) {
1132 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1133 list_del_init(&dp
->dl_perclnt
);
1134 list_move(&dp
->dl_recall_lru
, &reaplist
);
1136 spin_unlock(&recall_lock
);
1137 while (!list_empty(&reaplist
)) {
1138 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1139 unhash_delegation(dp
);
1141 while (!list_empty(&clp
->cl_openowners
)) {
1142 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1143 release_openowner(oo
);
1145 nfsd4_shutdown_callback(clp
);
1146 if (clp
->cl_cb_conn
.cb_xprt
)
1147 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1148 list_del(&clp
->cl_idhash
);
1149 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1150 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1152 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1153 spin_lock(&nn
->client_lock
);
1154 unhash_client_locked(clp
);
1155 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1157 spin_unlock(&nn
->client_lock
);
1160 static void expire_client(struct nfs4_client
*clp
)
1162 nfsd4_client_record_remove(clp
);
1163 destroy_client(clp
);
1166 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1168 memcpy(target
->cl_verifier
.data
, source
->data
,
1169 sizeof(target
->cl_verifier
.data
));
1172 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1174 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1175 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1178 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1180 if (source
->cr_principal
) {
1181 target
->cr_principal
=
1182 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1183 if (target
->cr_principal
== NULL
)
1186 target
->cr_principal
= NULL
;
1187 target
->cr_flavor
= source
->cr_flavor
;
1188 target
->cr_uid
= source
->cr_uid
;
1189 target
->cr_gid
= source
->cr_gid
;
1190 target
->cr_group_info
= source
->cr_group_info
;
1191 get_group_info(target
->cr_group_info
);
1196 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1200 res
= o1
->len
- o2
->len
;
1203 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1206 static int same_name(const char *n1
, const char *n2
)
1208 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1212 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1214 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1218 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1220 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1223 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1227 if (g1
->ngroups
!= g2
->ngroups
)
1229 for (i
=0; i
<g1
->ngroups
; i
++)
1230 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1236 * RFC 3530 language requires clid_inuse be returned when the
1237 * "principal" associated with a requests differs from that previously
1238 * used. We use uid, gid's, and gss principal string as our best
1239 * approximation. We also don't want to allow non-gss use of a client
1240 * established using gss: in theory cr_principal should catch that
1241 * change, but in practice cr_principal can be null even in the gss case
1242 * since gssd doesn't always pass down a principal string.
1244 static bool is_gss_cred(struct svc_cred
*cr
)
1246 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1247 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1252 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1254 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1255 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1256 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1257 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1259 if (cr1
->cr_principal
== cr2
->cr_principal
)
1261 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1263 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1266 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1268 static u32 current_clientid
= 1;
1270 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1271 clp
->cl_clientid
.cl_id
= current_clientid
++;
1274 static void gen_confirm(struct nfs4_client
*clp
)
1279 verf
[0] = (__be32
)get_seconds();
1280 verf
[1] = (__be32
)i
++;
1281 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1284 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1286 struct nfs4_stid
*ret
;
1288 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1289 if (!ret
|| !ret
->sc_type
)
1294 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1296 struct nfs4_stid
*s
;
1298 s
= find_stateid(cl
, t
);
1301 if (typemask
& s
->sc_type
)
1306 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1307 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1309 struct nfs4_client
*clp
;
1310 struct sockaddr
*sa
= svc_addr(rqstp
);
1312 struct net
*net
= SVC_NET(rqstp
);
1313 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1315 clp
= alloc_client(name
);
1319 INIT_LIST_HEAD(&clp
->cl_sessions
);
1320 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1322 spin_lock(&nn
->client_lock
);
1324 spin_unlock(&nn
->client_lock
);
1327 idr_init(&clp
->cl_stateids
);
1328 atomic_set(&clp
->cl_refcount
, 0);
1329 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1330 INIT_LIST_HEAD(&clp
->cl_idhash
);
1331 INIT_LIST_HEAD(&clp
->cl_openowners
);
1332 INIT_LIST_HEAD(&clp
->cl_delegations
);
1333 INIT_LIST_HEAD(&clp
->cl_lru
);
1334 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1335 spin_lock_init(&clp
->cl_lock
);
1336 nfsd4_init_callback(&clp
->cl_cb_null
);
1337 clp
->cl_time
= get_seconds();
1338 clear_bit(0, &clp
->cl_cb_slot_busy
);
1339 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1340 copy_verf(clp
, verf
);
1341 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1343 clp
->cl_cb_session
= NULL
;
1349 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1351 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1352 struct nfs4_client
*clp
;
1355 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1358 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1359 new = &((*new)->rb_left
);
1361 new = &((*new)->rb_right
);
1364 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1365 rb_insert_color(&new_clp
->cl_namenode
, root
);
1368 static struct nfs4_client
*
1369 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1372 struct rb_node
*node
= root
->rb_node
;
1373 struct nfs4_client
*clp
;
1376 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1377 cmp
= compare_blob(&clp
->cl_name
, name
);
1379 node
= node
->rb_left
;
1381 node
= node
->rb_right
;
1389 add_to_unconfirmed(struct nfs4_client
*clp
)
1391 unsigned int idhashval
;
1392 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1394 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1395 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1396 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1397 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1402 move_to_confirmed(struct nfs4_client
*clp
)
1404 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1405 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1407 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1408 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1409 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1410 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1411 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1415 static struct nfs4_client
*
1416 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1418 struct nfs4_client
*clp
;
1419 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1421 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1422 if (same_clid(&clp
->cl_clientid
, clid
)) {
1423 if ((bool)clp
->cl_minorversion
!= sessions
)
1432 static struct nfs4_client
*
1433 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1435 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1437 return find_client_in_id_table(tbl
, clid
, sessions
);
1440 static struct nfs4_client
*
1441 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1443 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1445 return find_client_in_id_table(tbl
, clid
, sessions
);
1448 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1450 return clp
->cl_exchange_flags
!= 0;
1453 static struct nfs4_client
*
1454 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1456 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1459 static struct nfs4_client
*
1460 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1462 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1466 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1468 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1469 struct sockaddr
*sa
= svc_addr(rqstp
);
1470 u32 scopeid
= rpc_get_scope_id(sa
);
1471 unsigned short expected_family
;
1473 /* Currently, we only support tcp and tcp6 for the callback channel */
1474 if (se
->se_callback_netid_len
== 3 &&
1475 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1476 expected_family
= AF_INET
;
1477 else if (se
->se_callback_netid_len
== 4 &&
1478 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1479 expected_family
= AF_INET6
;
1483 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1484 se
->se_callback_addr_len
,
1485 (struct sockaddr
*)&conn
->cb_addr
,
1486 sizeof(conn
->cb_addr
));
1488 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1491 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1492 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1494 conn
->cb_prog
= se
->se_callback_prog
;
1495 conn
->cb_ident
= se
->se_callback_ident
;
1496 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1499 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1500 conn
->cb_addrlen
= 0;
1501 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1502 "will not receive delegations\n",
1503 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1509 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1512 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1514 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1517 dprintk("--> %s slot %p\n", __func__
, slot
);
1519 slot
->sl_opcnt
= resp
->opcnt
;
1520 slot
->sl_status
= resp
->cstate
.status
;
1522 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1523 if (nfsd4_not_cached(resp
)) {
1524 slot
->sl_datalen
= 0;
1527 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1528 base
= (char *)resp
->cstate
.datap
-
1529 (char *)resp
->xbuf
->head
[0].iov_base
;
1530 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1532 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1537 * Encode the replay sequence operation from the slot values.
1538 * If cachethis is FALSE encode the uncached rep error on the next
1539 * operation which sets resp->p and increments resp->opcnt for
1540 * nfs4svc_encode_compoundres.
1544 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1545 struct nfsd4_compoundres
*resp
)
1547 struct nfsd4_op
*op
;
1548 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1550 /* Encode the replayed sequence operation */
1551 op
= &args
->ops
[resp
->opcnt
- 1];
1552 nfsd4_encode_operation(resp
, op
);
1554 /* Return nfserr_retry_uncached_rep in next operation. */
1555 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1556 op
= &args
->ops
[resp
->opcnt
++];
1557 op
->status
= nfserr_retry_uncached_rep
;
1558 nfsd4_encode_operation(resp
, op
);
1564 * The sequence operation is not cached because we can use the slot and
1568 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1569 struct nfsd4_sequence
*seq
)
1571 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1574 dprintk("--> %s slot %p\n", __func__
, slot
);
1576 /* Either returns 0 or nfserr_retry_uncached */
1577 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1578 if (status
== nfserr_retry_uncached_rep
)
1581 /* The sequence operation has been encoded, cstate->datap set. */
1582 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1584 resp
->opcnt
= slot
->sl_opcnt
;
1585 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1586 status
= slot
->sl_status
;
1592 * Set the exchange_id flags returned by the server.
1595 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1597 /* pNFS is not supported */
1598 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1600 /* Referrals are supported, Migration is not. */
1601 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1603 /* set the wire flags to return to client. */
1604 clid
->flags
= new->cl_exchange_flags
;
1607 static bool client_has_state(struct nfs4_client
*clp
)
1610 * Note clp->cl_openowners check isn't quite right: there's no
1611 * need to count owners without stateid's.
1613 * Also note we should probably be using this in 4.0 case too.
1615 return !list_empty(&clp
->cl_openowners
)
1616 || !list_empty(&clp
->cl_delegations
)
1617 || !list_empty(&clp
->cl_sessions
);
1621 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1622 struct nfsd4_compound_state
*cstate
,
1623 struct nfsd4_exchange_id
*exid
)
1625 struct nfs4_client
*unconf
, *conf
, *new;
1627 char addr_str
[INET6_ADDRSTRLEN
];
1628 nfs4_verifier verf
= exid
->verifier
;
1629 struct sockaddr
*sa
= svc_addr(rqstp
);
1630 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1631 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1633 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1634 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1635 "ip_addr=%s flags %x, spa_how %d\n",
1636 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1637 addr_str
, exid
->flags
, exid
->spa_how
);
1639 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1640 return nfserr_inval
;
1642 /* Currently only support SP4_NONE */
1643 switch (exid
->spa_how
) {
1646 default: /* checked by xdr code */
1650 return nfserr_serverfault
; /* no excuse :-/ */
1653 /* Cases below refer to rfc 5661 section 18.35.4: */
1655 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1657 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1658 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1661 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1662 status
= nfserr_inval
;
1665 if (!creds_match
) { /* case 9 */
1666 status
= nfserr_perm
;
1669 if (!verfs_match
) { /* case 8 */
1670 status
= nfserr_not_same
;
1674 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1678 if (!creds_match
) { /* case 3 */
1679 if (client_has_state(conf
)) {
1680 status
= nfserr_clid_inuse
;
1683 expire_client(conf
);
1686 if (verfs_match
) { /* case 2 */
1687 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1691 /* case 5, client reboot */
1695 if (update
) { /* case 7 */
1696 status
= nfserr_noent
;
1700 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1701 if (unconf
) /* case 4, possible retry or client restart */
1702 expire_client(unconf
);
1704 /* case 1 (normal case) */
1706 new = create_client(exid
->clname
, rqstp
, &verf
);
1708 status
= nfserr_jukebox
;
1711 new->cl_minorversion
= 1;
1714 add_to_unconfirmed(new);
1716 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1717 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1719 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1720 nfsd4_set_ex_flags(new, exid
);
1722 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1723 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1727 nfs4_unlock_state();
1732 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1734 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1737 /* The slot is in use, and no response has been sent. */
1739 if (seqid
== slot_seqid
)
1740 return nfserr_jukebox
;
1742 return nfserr_seq_misordered
;
1744 /* Note unsigned 32-bit arithmetic handles wraparound: */
1745 if (likely(seqid
== slot_seqid
+ 1))
1747 if (seqid
== slot_seqid
)
1748 return nfserr_replay_cache
;
1749 return nfserr_seq_misordered
;
1753 * Cache the create session result into the create session single DRC
1754 * slot cache by saving the xdr structure. sl_seqid has been set.
1755 * Do this for solo or embedded create session operations.
1758 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1759 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1761 slot
->sl_status
= nfserr
;
1762 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1766 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1767 struct nfsd4_clid_slot
*slot
)
1769 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1770 return slot
->sl_status
;
1773 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1774 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1775 1 + /* MIN tag is length with zero, only length */ \
1776 3 + /* version, opcount, opcode */ \
1777 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1778 /* seqid, slotID, slotID, cache */ \
1779 4 ) * sizeof(__be32))
1781 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1782 2 + /* verifier: AUTH_NULL, length 0 */\
1784 1 + /* MIN tag is length with zero, only length */ \
1785 3 + /* opcount, opcode, opstatus*/ \
1786 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1787 /* seqid, slotID, slotID, slotID, status */ \
1788 5 ) * sizeof(__be32))
1790 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1792 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1793 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1797 nfsd4_create_session(struct svc_rqst
*rqstp
,
1798 struct nfsd4_compound_state
*cstate
,
1799 struct nfsd4_create_session
*cr_ses
)
1801 struct sockaddr
*sa
= svc_addr(rqstp
);
1802 struct nfs4_client
*conf
, *unconf
;
1803 struct nfsd4_session
*new;
1804 struct nfsd4_conn
*conn
;
1805 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1807 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1809 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1810 return nfserr_inval
;
1811 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1812 return nfserr_toosmall
;
1813 new = alloc_session(&cr_ses
->fore_channel
, nn
);
1815 return nfserr_jukebox
;
1816 status
= nfserr_jukebox
;
1817 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1819 goto out_free_session
;
1822 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1823 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1824 WARN_ON_ONCE(conf
&& unconf
);
1827 cs_slot
= &conf
->cl_cs_slot
;
1828 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1829 if (status
== nfserr_replay_cache
) {
1830 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1832 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1833 status
= nfserr_seq_misordered
;
1836 } else if (unconf
) {
1837 struct nfs4_client
*old
;
1838 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1839 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1840 status
= nfserr_clid_inuse
;
1843 cs_slot
= &unconf
->cl_cs_slot
;
1844 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1846 /* an unconfirmed replay returns misordered */
1847 status
= nfserr_seq_misordered
;
1850 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1852 status
= mark_client_expired(old
);
1857 move_to_confirmed(unconf
);
1860 status
= nfserr_stale_clientid
;
1865 * We do not support RDMA or persistent sessions
1867 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1868 cr_ses
->flags
&= ~SESSION4_RDMA
;
1870 init_session(rqstp
, new, conf
, cr_ses
);
1871 nfsd4_init_conn(rqstp
, conn
, new);
1873 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1874 NFS4_MAX_SESSIONID_LEN
);
1875 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1876 sizeof(struct nfsd4_channel_attrs
));
1877 cs_slot
->sl_seqid
++;
1878 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1880 /* cache solo and embedded create sessions under the state lock */
1881 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1882 nfs4_unlock_state();
1885 nfs4_unlock_state();
1888 __free_session(new);
1892 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1895 case NFS4_CDFC4_FORE
:
1896 case NFS4_CDFC4_BACK
:
1898 case NFS4_CDFC4_FORE_OR_BOTH
:
1899 case NFS4_CDFC4_BACK_OR_BOTH
:
1900 *dir
= NFS4_CDFC4_BOTH
;
1903 return nfserr_inval
;
1906 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1908 struct nfsd4_session
*session
= cstate
->session
;
1909 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1911 spin_lock(&nn
->client_lock
);
1912 session
->se_cb_prog
= bc
->bc_cb_program
;
1913 session
->se_cb_sec
= bc
->bc_cb_sec
;
1914 spin_unlock(&nn
->client_lock
);
1916 nfsd4_probe_callback(session
->se_client
);
1921 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1922 struct nfsd4_compound_state
*cstate
,
1923 struct nfsd4_bind_conn_to_session
*bcts
)
1926 struct nfsd4_conn
*conn
;
1927 struct nfsd4_session
*session
;
1928 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1930 if (!nfsd4_last_compound_op(rqstp
))
1931 return nfserr_not_only_op
;
1933 spin_lock(&nn
->client_lock
);
1934 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1935 spin_unlock(&nn
->client_lock
);
1936 status
= nfserr_badsession
;
1939 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1942 conn
= alloc_conn(rqstp
, bcts
->dir
);
1943 status
= nfserr_jukebox
;
1946 nfsd4_init_conn(rqstp
, conn
, session
);
1949 nfs4_unlock_state();
1953 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1957 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1961 nfsd4_destroy_session(struct svc_rqst
*r
,
1962 struct nfsd4_compound_state
*cstate
,
1963 struct nfsd4_destroy_session
*sessionid
)
1965 struct nfsd4_session
*ses
;
1967 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
1970 status
= nfserr_not_only_op
;
1971 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1972 if (!nfsd4_last_compound_op(r
))
1975 dump_sessionid(__func__
, &sessionid
->sessionid
);
1976 spin_lock(&nn
->client_lock
);
1977 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
1978 status
= nfserr_badsession
;
1980 goto out_client_lock
;
1981 status
= mark_session_dead_locked(ses
);
1983 goto out_client_lock
;
1984 unhash_session(ses
);
1985 spin_unlock(&nn
->client_lock
);
1987 nfsd4_probe_callback_sync(ses
->se_client
);
1989 spin_lock(&nn
->client_lock
);
1993 spin_unlock(&nn
->client_lock
);
1995 nfs4_unlock_state();
1999 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2001 struct nfsd4_conn
*c
;
2003 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2004 if (c
->cn_xprt
== xpt
) {
2011 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2013 struct nfs4_client
*clp
= ses
->se_client
;
2014 struct nfsd4_conn
*c
;
2017 spin_lock(&clp
->cl_lock
);
2018 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2020 spin_unlock(&clp
->cl_lock
);
2024 __nfsd4_hash_conn(new, ses
);
2025 spin_unlock(&clp
->cl_lock
);
2026 ret
= nfsd4_register_conn(new);
2028 /* oops; xprt is already down: */
2029 nfsd4_conn_lost(&new->cn_xpt_user
);
2033 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2035 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2037 return args
->opcnt
> session
->se_fchannel
.maxops
;
2040 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2041 struct nfsd4_session
*session
)
2043 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2045 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2049 nfsd4_sequence(struct svc_rqst
*rqstp
,
2050 struct nfsd4_compound_state
*cstate
,
2051 struct nfsd4_sequence
*seq
)
2053 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2054 struct nfsd4_session
*session
;
2055 struct nfs4_client
*clp
;
2056 struct nfsd4_slot
*slot
;
2057 struct nfsd4_conn
*conn
;
2059 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2061 if (resp
->opcnt
!= 1)
2062 return nfserr_sequence_pos
;
2065 * Will be either used or freed by nfsd4_sequence_check_conn
2068 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2070 return nfserr_jukebox
;
2072 spin_lock(&nn
->client_lock
);
2073 status
= nfserr_badsession
;
2074 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2076 goto out_no_session
;
2077 clp
= session
->se_client
;
2078 status
= get_client_locked(clp
);
2080 goto out_no_session
;
2081 status
= nfsd4_get_session_locked(session
);
2083 goto out_put_client
;
2085 status
= nfserr_too_many_ops
;
2086 if (nfsd4_session_too_many_ops(rqstp
, session
))
2087 goto out_put_session
;
2089 status
= nfserr_req_too_big
;
2090 if (nfsd4_request_too_big(rqstp
, session
))
2091 goto out_put_session
;
2093 status
= nfserr_badslot
;
2094 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2095 goto out_put_session
;
2097 slot
= session
->se_slots
[seq
->slotid
];
2098 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2100 /* We do not negotiate the number of slots yet, so set the
2101 * maxslots to the session maxreqs which is used to encode
2102 * sr_highest_slotid and the sr_target_slot id to maxslots */
2103 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2105 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2106 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2107 if (status
== nfserr_replay_cache
) {
2108 status
= nfserr_seq_misordered
;
2109 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2110 goto out_put_session
;
2111 cstate
->slot
= slot
;
2112 cstate
->session
= session
;
2113 /* Return the cached reply status and set cstate->status
2114 * for nfsd4_proc_compound processing */
2115 status
= nfsd4_replay_cache_entry(resp
, seq
);
2116 cstate
->status
= nfserr_replay_cache
;
2120 goto out_put_session
;
2122 nfsd4_sequence_check_conn(conn
, session
);
2125 /* Success! bump slot seqid */
2126 slot
->sl_seqid
= seq
->seqid
;
2127 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2129 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2131 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2133 cstate
->slot
= slot
;
2134 cstate
->session
= session
;
2137 switch (clp
->cl_cb_state
) {
2139 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2141 case NFSD4_CB_FAULT
:
2142 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2145 seq
->status_flags
= 0;
2149 spin_unlock(&nn
->client_lock
);
2152 nfsd4_put_session(session
);
2154 put_client_renew_locked(clp
);
2155 goto out_no_session
;
2159 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2161 struct nfs4_client
*conf
, *unconf
, *clp
;
2163 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2166 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2167 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2168 WARN_ON_ONCE(conf
&& unconf
);
2173 if (client_has_state(conf
)) {
2174 status
= nfserr_clientid_busy
;
2180 status
= nfserr_stale_clientid
;
2186 nfs4_unlock_state();
2191 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2195 if (rc
->rca_one_fs
) {
2196 if (!cstate
->current_fh
.fh_dentry
)
2197 return nfserr_nofilehandle
;
2199 * We don't take advantage of the rca_one_fs case.
2200 * That's OK, it's optional, we can safely ignore it.
2206 status
= nfserr_complete_already
;
2207 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2208 &cstate
->session
->se_client
->cl_flags
))
2211 status
= nfserr_stale_clientid
;
2212 if (is_client_expired(cstate
->session
->se_client
))
2214 * The following error isn't really legal.
2215 * But we only get here if the client just explicitly
2216 * destroyed the client. Surely it no longer cares what
2217 * error it gets back on an operation for the dead
2223 nfsd4_client_record_create(cstate
->session
->se_client
);
2225 nfs4_unlock_state();
2230 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2231 struct nfsd4_setclientid
*setclid
)
2233 struct xdr_netobj clname
= setclid
->se_name
;
2234 nfs4_verifier clverifier
= setclid
->se_verf
;
2235 struct nfs4_client
*conf
, *unconf
, *new;
2237 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2239 /* Cases below refer to rfc 3530 section 14.2.33: */
2241 conf
= find_confirmed_client_by_name(&clname
, nn
);
2244 status
= nfserr_clid_inuse
;
2245 if (clp_used_exchangeid(conf
))
2247 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2248 char addr_str
[INET6_ADDRSTRLEN
];
2249 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2251 dprintk("NFSD: setclientid: string in use by client "
2252 "at %s\n", addr_str
);
2256 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2258 expire_client(unconf
);
2259 status
= nfserr_jukebox
;
2260 new = create_client(clname
, rqstp
, &clverifier
);
2263 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2264 /* case 1: probable callback update */
2265 copy_clid(new, conf
);
2266 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2268 new->cl_minorversion
= 0;
2269 gen_callback(new, setclid
, rqstp
);
2270 add_to_unconfirmed(new);
2271 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2272 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2273 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2276 nfs4_unlock_state();
2282 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2283 struct nfsd4_compound_state
*cstate
,
2284 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2286 struct nfs4_client
*conf
, *unconf
;
2287 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2288 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2290 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2292 if (STALE_CLIENTID(clid
, nn
))
2293 return nfserr_stale_clientid
;
2296 conf
= find_confirmed_client(clid
, false, nn
);
2297 unconf
= find_unconfirmed_client(clid
, false, nn
);
2299 * We try hard to give out unique clientid's, so if we get an
2300 * attempt to confirm the same clientid with a different cred,
2301 * there's a bug somewhere. Let's charitably assume it's our
2304 status
= nfserr_serverfault
;
2305 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2307 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2309 /* cases below refer to rfc 3530 section 14.2.34: */
2310 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2311 if (conf
&& !unconf
) /* case 2: probable retransmit */
2313 else /* case 4: client hasn't noticed we rebooted yet? */
2314 status
= nfserr_stale_clientid
;
2318 if (conf
) { /* case 1: callback update */
2319 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2320 nfsd4_probe_callback(conf
);
2321 expire_client(unconf
);
2322 } else { /* case 3: normal case; new or rebooted client */
2323 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2325 status
= mark_client_expired(conf
);
2328 expire_client(conf
);
2330 move_to_confirmed(unconf
);
2331 nfsd4_probe_callback(unconf
);
2334 nfs4_unlock_state();
2338 static struct nfs4_file
*nfsd4_alloc_file(void)
2340 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2343 /* OPEN Share state helper functions */
2344 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2346 unsigned int hashval
= file_hashval(ino
);
2348 atomic_set(&fp
->fi_ref
, 1);
2349 INIT_LIST_HEAD(&fp
->fi_stateids
);
2350 INIT_LIST_HEAD(&fp
->fi_delegations
);
2351 fp
->fi_inode
= igrab(ino
);
2352 fp
->fi_had_conflict
= false;
2353 fp
->fi_lease
= NULL
;
2354 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2355 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2356 spin_lock(&recall_lock
);
2357 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2358 spin_unlock(&recall_lock
);
2362 nfsd4_free_slab(struct kmem_cache
**slab
)
2366 kmem_cache_destroy(*slab
);
2371 nfsd4_free_slabs(void)
2373 nfsd4_free_slab(&openowner_slab
);
2374 nfsd4_free_slab(&lockowner_slab
);
2375 nfsd4_free_slab(&file_slab
);
2376 nfsd4_free_slab(&stateid_slab
);
2377 nfsd4_free_slab(&deleg_slab
);
2381 nfsd4_init_slabs(void)
2383 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2384 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2385 if (openowner_slab
== NULL
)
2387 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2388 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2389 if (lockowner_slab
== NULL
)
2391 file_slab
= kmem_cache_create("nfsd4_files",
2392 sizeof(struct nfs4_file
), 0, 0, NULL
);
2393 if (file_slab
== NULL
)
2395 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2396 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2397 if (stateid_slab
== NULL
)
2399 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2400 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2401 if (deleg_slab
== NULL
)
2406 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2410 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2412 kfree(oo
->oo_owner
.so_owner
.data
);
2413 kmem_cache_free(openowner_slab
, oo
);
2416 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2418 kfree(lo
->lo_owner
.so_owner
.data
);
2419 kmem_cache_free(lockowner_slab
, lo
);
2422 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2424 rp
->rp_status
= nfserr_serverfault
;
2426 rp
->rp_buf
= rp
->rp_ibuf
;
2429 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2431 struct nfs4_stateowner
*sop
;
2433 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2437 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2438 if (!sop
->so_owner
.data
) {
2439 kmem_cache_free(slab
, sop
);
2442 sop
->so_owner
.len
= owner
->len
;
2444 INIT_LIST_HEAD(&sop
->so_stateids
);
2445 sop
->so_client
= clp
;
2446 init_nfs4_replay(&sop
->so_replay
);
2450 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2452 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2454 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2455 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2458 static struct nfs4_openowner
*
2459 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2460 struct nfs4_openowner
*oo
;
2462 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2465 oo
->oo_owner
.so_is_open_owner
= 1;
2466 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2467 oo
->oo_flags
= NFS4_OO_NEW
;
2469 oo
->oo_last_closed_stid
= NULL
;
2470 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2471 hash_openowner(oo
, clp
, strhashval
);
2475 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2476 struct nfs4_openowner
*oo
= open
->op_openowner
;
2478 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2479 INIT_LIST_HEAD(&stp
->st_lockowners
);
2480 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2481 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2482 stp
->st_stateowner
= &oo
->oo_owner
;
2485 stp
->st_access_bmap
= 0;
2486 stp
->st_deny_bmap
= 0;
2487 set_access(open
->op_share_access
, stp
);
2488 set_deny(open
->op_share_deny
, stp
);
2489 stp
->st_openstp
= NULL
;
2493 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2495 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2497 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2499 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2500 oo
->oo_time
= get_seconds();
2504 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2507 return (sop
->so_owner
.len
== owner
->len
) &&
2508 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2509 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2512 static struct nfs4_openowner
*
2513 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2514 bool sessions
, struct nfsd_net
*nn
)
2516 struct nfs4_stateowner
*so
;
2517 struct nfs4_openowner
*oo
;
2518 struct nfs4_client
*clp
;
2520 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2521 if (!so
->so_is_open_owner
)
2523 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2525 clp
= oo
->oo_owner
.so_client
;
2526 if ((bool)clp
->cl_minorversion
!= sessions
)
2528 renew_client(oo
->oo_owner
.so_client
);
2535 /* search file_hashtbl[] for file */
2536 static struct nfs4_file
*
2537 find_file(struct inode
*ino
)
2539 unsigned int hashval
= file_hashval(ino
);
2540 struct nfs4_file
*fp
;
2542 spin_lock(&recall_lock
);
2543 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2544 if (fp
->fi_inode
== ino
) {
2546 spin_unlock(&recall_lock
);
2550 spin_unlock(&recall_lock
);
2555 * Called to check deny when READ with all zero stateid or
2556 * WRITE with all zero or all one stateid
2559 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2561 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2562 struct nfs4_file
*fp
;
2563 struct nfs4_ol_stateid
*stp
;
2566 fp
= find_file(ino
);
2569 ret
= nfserr_locked
;
2570 /* Search for conflicting share reservations */
2571 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2572 if (test_deny(deny_type
, stp
) ||
2573 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2582 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2584 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2585 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2587 /* We're assuming the state code never drops its reference
2588 * without first removing the lease. Since we're in this lease
2589 * callback (and since the lease code is serialized by the kernel
2590 * lock) we know the server hasn't removed the lease yet, we know
2591 * it's safe to take a reference: */
2592 atomic_inc(&dp
->dl_count
);
2594 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2596 /* only place dl_time is set. protected by lock_flocks*/
2597 dp
->dl_time
= get_seconds();
2599 nfsd4_cb_recall(dp
);
2602 /* Called from break_lease() with lock_flocks() held. */
2603 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2605 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2606 struct nfs4_delegation
*dp
;
2609 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2612 if (fp
->fi_had_conflict
) {
2613 WARN(1, "duplicate break on %p\n", fp
);
2617 * We don't want the locks code to timeout the lease for us;
2618 * we'll remove it ourself if a delegation isn't returned
2621 fl
->fl_break_time
= 0;
2623 spin_lock(&recall_lock
);
2624 fp
->fi_had_conflict
= true;
2625 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2626 nfsd_break_one_deleg(dp
);
2627 spin_unlock(&recall_lock
);
2631 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2634 return lease_modify(onlist
, arg
);
2639 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2640 .lm_break
= nfsd_break_deleg_cb
,
2641 .lm_change
= nfsd_change_deleg_cb
,
2644 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2646 if (nfsd4_has_session(cstate
))
2648 if (seqid
== so
->so_seqid
- 1)
2649 return nfserr_replay_me
;
2650 if (seqid
== so
->so_seqid
)
2652 return nfserr_bad_seqid
;
2656 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2657 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2659 clientid_t
*clientid
= &open
->op_clientid
;
2660 struct nfs4_client
*clp
= NULL
;
2661 unsigned int strhashval
;
2662 struct nfs4_openowner
*oo
= NULL
;
2665 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2666 return nfserr_stale_clientid
;
2668 * In case we need it later, after we've already created the
2669 * file and don't want to risk a further failure:
2671 open
->op_file
= nfsd4_alloc_file();
2672 if (open
->op_file
== NULL
)
2673 return nfserr_jukebox
;
2675 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2676 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2677 open
->op_openowner
= oo
;
2679 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2682 return nfserr_expired
;
2685 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2686 /* Replace unconfirmed owners without checking for replay. */
2687 clp
= oo
->oo_owner
.so_client
;
2688 release_openowner(oo
);
2689 open
->op_openowner
= NULL
;
2692 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2695 clp
= oo
->oo_owner
.so_client
;
2698 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2700 return nfserr_jukebox
;
2701 open
->op_openowner
= oo
;
2703 open
->op_stp
= nfs4_alloc_stateid(clp
);
2705 return nfserr_jukebox
;
2709 static inline __be32
2710 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2712 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2713 return nfserr_openmode
;
2718 static int share_access_to_flags(u32 share_access
)
2720 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2723 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2725 struct nfs4_stid
*ret
;
2727 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2730 return delegstateid(ret
);
2733 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2735 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2736 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2740 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2741 struct nfs4_delegation
**dp
)
2744 __be32 status
= nfserr_bad_stateid
;
2746 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2749 flags
= share_access_to_flags(open
->op_share_access
);
2750 status
= nfs4_check_delegmode(*dp
, flags
);
2754 if (!nfsd4_is_deleg_cur(open
))
2758 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2763 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2765 struct nfs4_ol_stateid
*local
;
2766 struct nfs4_openowner
*oo
= open
->op_openowner
;
2768 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2769 /* ignore lock owners */
2770 if (local
->st_stateowner
->so_is_open_owner
== 0)
2772 /* remember if we have seen this open owner */
2773 if (local
->st_stateowner
== &oo
->oo_owner
)
2775 /* check for conflicting share reservations */
2776 if (!test_share(local
, open
))
2777 return nfserr_share_denied
;
2782 static inline int nfs4_access_to_access(u32 nfs4_access
)
2786 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2787 flags
|= NFSD_MAY_READ
;
2788 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2789 flags
|= NFSD_MAY_WRITE
;
2793 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2794 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2797 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2798 int access
= nfs4_access_to_access(open
->op_share_access
);
2800 if (!fp
->fi_fds
[oflag
]) {
2801 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2802 &fp
->fi_fds
[oflag
]);
2806 nfs4_file_get_access(fp
, oflag
);
2811 static inline __be32
2812 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2813 struct nfsd4_open
*open
)
2815 struct iattr iattr
= {
2816 .ia_valid
= ATTR_SIZE
,
2819 if (!open
->op_truncate
)
2821 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2822 return nfserr_inval
;
2823 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2827 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
)
2829 u32 op_share_access
= open
->op_share_access
;
2833 new_access
= !test_access(op_share_access
, stp
);
2835 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2839 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2842 int oflag
= nfs4_access_to_omode(op_share_access
);
2843 nfs4_file_put_access(fp
, oflag
);
2847 /* remember the open */
2848 set_access(op_share_access
, stp
);
2849 set_deny(open
->op_share_deny
, stp
);
2856 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2858 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2861 /* Should we give out recallable state?: */
2862 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2864 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2867 * In the sessions case, since we don't have to establish a
2868 * separate connection for callbacks, we assume it's OK
2869 * until we hear otherwise:
2871 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2874 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2876 struct file_lock
*fl
;
2878 fl
= locks_alloc_lock();
2881 locks_init_lock(fl
);
2882 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2883 fl
->fl_flags
= FL_LEASE
;
2884 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2885 fl
->fl_end
= OFFSET_MAX
;
2886 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2887 fl
->fl_pid
= current
->tgid
;
2891 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2893 struct nfs4_file
*fp
= dp
->dl_file
;
2894 struct file_lock
*fl
;
2897 fl
= nfs4_alloc_init_lease(dp
, flag
);
2900 fl
->fl_file
= find_readable_file(fp
);
2901 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2902 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2904 list_del_init(&dp
->dl_perclnt
);
2905 locks_free_lock(fl
);
2909 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2910 atomic_set(&fp
->fi_delegees
, 1);
2911 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2915 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2917 struct nfs4_file
*fp
= dp
->dl_file
;
2920 return nfs4_setlease(dp
, flag
);
2921 spin_lock(&recall_lock
);
2922 if (fp
->fi_had_conflict
) {
2923 spin_unlock(&recall_lock
);
2926 atomic_inc(&fp
->fi_delegees
);
2927 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2928 spin_unlock(&recall_lock
);
2929 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2933 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2935 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2936 if (status
== -EAGAIN
)
2937 open
->op_why_no_deleg
= WND4_CONTENTION
;
2939 open
->op_why_no_deleg
= WND4_RESOURCE
;
2940 switch (open
->op_deleg_want
) {
2941 case NFS4_SHARE_WANT_READ_DELEG
:
2942 case NFS4_SHARE_WANT_WRITE_DELEG
:
2943 case NFS4_SHARE_WANT_ANY_DELEG
:
2945 case NFS4_SHARE_WANT_CANCEL
:
2946 open
->op_why_no_deleg
= WND4_CANCELLED
;
2948 case NFS4_SHARE_WANT_NO_DELEG
:
2955 * Attempt to hand out a delegation.
2958 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2959 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2961 struct nfs4_delegation
*dp
;
2962 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2964 int status
= 0, flag
= 0;
2966 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2967 flag
= NFS4_OPEN_DELEGATE_NONE
;
2968 open
->op_recall
= 0;
2969 switch (open
->op_claim_type
) {
2970 case NFS4_OPEN_CLAIM_PREVIOUS
:
2972 open
->op_recall
= 1;
2973 flag
= open
->op_delegate_type
;
2974 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2977 case NFS4_OPEN_CLAIM_NULL
:
2978 /* Let's not give out any delegations till everyone's
2979 * had the chance to reclaim theirs.... */
2980 if (locks_in_grace(net
))
2982 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2984 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2985 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2987 flag
= NFS4_OPEN_DELEGATE_READ
;
2993 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2996 status
= nfs4_set_delegation(dp
, flag
);
3000 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3002 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3003 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3005 open
->op_delegate_type
= flag
;
3006 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
3007 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3008 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
3009 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3011 /* 4.1 client asking for a delegation? */
3012 if (open
->op_deleg_want
)
3013 nfsd4_open_deleg_none_ext(open
, status
);
3017 unhash_stid(&dp
->dl_stid
);
3018 nfs4_put_delegation(dp
);
3020 flag
= NFS4_OPEN_DELEGATE_NONE
;
3024 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3025 struct nfs4_delegation
*dp
)
3027 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3028 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3029 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3030 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3031 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3032 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3033 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3034 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3036 /* Otherwise the client must be confused wanting a delegation
3037 * it already has, therefore we don't return
3038 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3043 * called with nfs4_lock_state() held.
3046 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3048 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3049 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3050 struct nfs4_file
*fp
= NULL
;
3051 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3052 struct nfs4_ol_stateid
*stp
= NULL
;
3053 struct nfs4_delegation
*dp
= NULL
;
3057 * Lookup file; if found, lookup stateid and check open request,
3058 * and check for delegations in the process of being recalled.
3059 * If not found, create the nfs4_file struct
3061 fp
= find_file(ino
);
3063 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3065 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3069 status
= nfserr_bad_stateid
;
3070 if (nfsd4_is_deleg_cur(open
))
3072 status
= nfserr_jukebox
;
3074 open
->op_file
= NULL
;
3075 nfsd4_init_file(fp
, ino
);
3079 * OPEN the file, or upgrade an existing OPEN.
3080 * If truncate fails, the OPEN fails.
3083 /* Stateid was found, this is an OPEN upgrade */
3084 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3088 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3091 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3095 open
->op_stp
= NULL
;
3096 init_open_stateid(stp
, fp
, open
);
3098 update_stateid(&stp
->st_stid
.sc_stateid
);
3099 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3101 if (nfsd4_has_session(&resp
->cstate
)) {
3102 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3104 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3105 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3106 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3112 * Attempt to hand out a delegation. No error return, because the
3113 * OPEN succeeds even if we fail.
3115 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3119 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3120 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3122 /* 4.1 client trying to upgrade/downgrade delegation? */
3123 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3124 open
->op_deleg_want
)
3125 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3129 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3130 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3132 * To finish the open response, we just need to set the rflags.
3134 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3135 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3136 !nfsd4_has_session(&resp
->cstate
))
3137 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3142 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3144 if (open
->op_openowner
) {
3145 struct nfs4_openowner
*oo
= open
->op_openowner
;
3147 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3148 list_del_init(&oo
->oo_close_lru
);
3149 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3151 release_openowner(oo
);
3152 open
->op_openowner
= NULL
;
3154 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3158 nfsd4_free_file(open
->op_file
);
3160 free_generic_stateid(open
->op_stp
);
3163 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3165 struct nfs4_client
*found
;
3167 if (STALE_CLIENTID(clid
, nn
))
3168 return nfserr_stale_clientid
;
3169 found
= find_confirmed_client(clid
, session
, nn
);
3172 return found
? nfs_ok
: nfserr_expired
;
3176 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3179 struct nfs4_client
*clp
;
3181 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3184 dprintk("process_renew(%08x/%08x): starting\n",
3185 clid
->cl_boot
, clid
->cl_id
);
3186 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3189 status
= nfserr_cb_path_down
;
3190 if (!list_empty(&clp
->cl_delegations
)
3191 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3195 nfs4_unlock_state();
3200 nfsd4_end_grace(struct nfsd_net
*nn
)
3202 /* do nothing if grace period already ended */
3203 if (nn
->grace_ended
)
3206 dprintk("NFSD: end of grace period\n");
3207 nn
->grace_ended
= true;
3208 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3209 locks_end_grace(&nn
->nfsd4_manager
);
3211 * Now that every NFSv4 client has had the chance to recover and
3212 * to see the (possibly new, possibly shorter) lease time, we
3213 * can safely set the next grace time to the current lease time:
3215 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3219 nfs4_laundromat(struct nfsd_net
*nn
)
3221 struct nfs4_client
*clp
;
3222 struct nfs4_openowner
*oo
;
3223 struct nfs4_delegation
*dp
;
3224 struct list_head
*pos
, *next
, reaplist
;
3225 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3226 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3227 time_t u
, test_val
= nn
->nfsd4_lease
;
3231 dprintk("NFSD: laundromat service - starting\n");
3232 nfsd4_end_grace(nn
);
3233 INIT_LIST_HEAD(&reaplist
);
3234 spin_lock(&nn
->client_lock
);
3235 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3236 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3237 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3238 t
= clp
->cl_time
- cutoff
;
3239 if (clientid_val
> t
)
3243 if (mark_client_expired_locked(clp
)) {
3244 dprintk("NFSD: client in use (clientid %08x)\n",
3245 clp
->cl_clientid
.cl_id
);
3248 list_move(&clp
->cl_lru
, &reaplist
);
3250 spin_unlock(&nn
->client_lock
);
3251 list_for_each_safe(pos
, next
, &reaplist
) {
3252 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3253 dprintk("NFSD: purging unused client (clientid %08x)\n",
3254 clp
->cl_clientid
.cl_id
);
3257 spin_lock(&recall_lock
);
3258 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3259 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3260 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3262 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3263 u
= dp
->dl_time
- cutoff
;
3268 list_move(&dp
->dl_recall_lru
, &reaplist
);
3270 spin_unlock(&recall_lock
);
3271 list_for_each_safe(pos
, next
, &reaplist
) {
3272 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3273 unhash_delegation(dp
);
3275 test_val
= nn
->nfsd4_lease
;
3276 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3277 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3278 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3279 u
= oo
->oo_time
- cutoff
;
3284 release_openowner(oo
);
3286 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3287 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3288 nfs4_unlock_state();
3289 return clientid_val
;
3292 static struct workqueue_struct
*laundry_wq
;
3293 static void laundromat_main(struct work_struct
*);
3296 laundromat_main(struct work_struct
*laundry
)
3299 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3301 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3304 t
= nfs4_laundromat(nn
);
3305 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3306 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3309 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3311 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3312 return nfserr_bad_stateid
;
3317 access_permit_read(struct nfs4_ol_stateid
*stp
)
3319 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3320 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3321 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3325 access_permit_write(struct nfs4_ol_stateid
*stp
)
3327 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3328 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3332 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3334 __be32 status
= nfserr_openmode
;
3336 /* For lock stateid's, we test the parent open, not the lock: */
3337 if (stp
->st_openstp
)
3338 stp
= stp
->st_openstp
;
3339 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3341 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3348 static inline __be32
3349 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3351 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3353 else if (locks_in_grace(net
)) {
3354 /* Answer in remaining cases depends on existence of
3355 * conflicting state; so we must wait out the grace period. */
3356 return nfserr_grace
;
3357 } else if (flags
& WR_STATE
)
3358 return nfs4_share_conflict(current_fh
,
3359 NFS4_SHARE_DENY_WRITE
);
3360 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3361 return nfs4_share_conflict(current_fh
,
3362 NFS4_SHARE_DENY_READ
);
3366 * Allow READ/WRITE during grace period on recovered state only for files
3367 * that are not able to provide mandatory locking.
3370 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3372 return locks_in_grace(net
) && mandatory_lock(inode
);
3375 /* Returns true iff a is later than b: */
3376 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3378 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3381 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3384 * When sessions are used the stateid generation number is ignored
3387 if (has_session
&& in
->si_generation
== 0)
3390 if (in
->si_generation
== ref
->si_generation
)
3393 /* If the client sends us a stateid from the future, it's buggy: */
3394 if (stateid_generation_after(in
, ref
))
3395 return nfserr_bad_stateid
;
3397 * However, we could see a stateid from the past, even from a
3398 * non-buggy client. For example, if the client sends a lock
3399 * while some IO is outstanding, the lock may bump si_generation
3400 * while the IO is still in flight. The client could avoid that
3401 * situation by waiting for responses on all the IO requests,
3402 * but better performance may result in retrying IO that
3403 * receives an old_stateid error if requests are rarely
3404 * reordered in flight:
3406 return nfserr_old_stateid
;
3409 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3411 struct nfs4_stid
*s
;
3412 struct nfs4_ol_stateid
*ols
;
3415 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3416 return nfserr_bad_stateid
;
3417 /* Client debugging aid. */
3418 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3419 char addr_str
[INET6_ADDRSTRLEN
];
3420 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3422 pr_warn_ratelimited("NFSD: client %s testing state ID "
3423 "with incorrect client ID\n", addr_str
);
3424 return nfserr_bad_stateid
;
3426 s
= find_stateid(cl
, stateid
);
3428 return nfserr_bad_stateid
;
3429 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3432 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3434 ols
= openlockstateid(s
);
3435 if (ols
->st_stateowner
->so_is_open_owner
3436 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3437 return nfserr_bad_stateid
;
3441 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3442 struct nfs4_stid
**s
, bool sessions
,
3443 struct nfsd_net
*nn
)
3445 struct nfs4_client
*cl
;
3448 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3449 return nfserr_bad_stateid
;
3450 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3452 if (status
== nfserr_stale_clientid
)
3453 return nfserr_stale_stateid
;
3456 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3458 return nfserr_bad_stateid
;
3463 * Checks for stateid operations
3466 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3467 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3469 struct nfs4_stid
*s
;
3470 struct nfs4_ol_stateid
*stp
= NULL
;
3471 struct nfs4_delegation
*dp
= NULL
;
3472 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3473 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3474 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3480 if (grace_disallows_io(net
, ino
))
3481 return nfserr_grace
;
3483 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3484 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3486 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3487 &s
, cstate
->minorversion
, nn
);
3490 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3493 switch (s
->sc_type
) {
3494 case NFS4_DELEG_STID
:
3495 dp
= delegstateid(s
);
3496 status
= nfs4_check_delegmode(dp
, flags
);
3500 *filpp
= dp
->dl_file
->fi_deleg_file
;
3503 status
= nfserr_serverfault
;
3508 case NFS4_OPEN_STID
:
3509 case NFS4_LOCK_STID
:
3510 stp
= openlockstateid(s
);
3511 status
= nfs4_check_fh(current_fh
, stp
);
3514 if (stp
->st_stateowner
->so_is_open_owner
3515 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3517 status
= nfs4_check_openmode(stp
, flags
);
3521 if (flags
& RD_STATE
)
3522 *filpp
= find_readable_file(stp
->st_file
);
3524 *filpp
= find_writeable_file(stp
->st_file
);
3528 return nfserr_bad_stateid
;
3536 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3538 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3539 return nfserr_locks_held
;
3540 release_lock_stateid(stp
);
3545 * Test if the stateid is valid
3548 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3549 struct nfsd4_test_stateid
*test_stateid
)
3551 struct nfsd4_test_stateid_id
*stateid
;
3552 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3555 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3556 stateid
->ts_id_status
=
3557 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3558 nfs4_unlock_state();
3564 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3565 struct nfsd4_free_stateid
*free_stateid
)
3567 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3568 struct nfs4_stid
*s
;
3569 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3570 __be32 ret
= nfserr_bad_stateid
;
3573 s
= find_stateid(cl
, stateid
);
3576 switch (s
->sc_type
) {
3577 case NFS4_DELEG_STID
:
3578 ret
= nfserr_locks_held
;
3580 case NFS4_OPEN_STID
:
3581 case NFS4_LOCK_STID
:
3582 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3585 if (s
->sc_type
== NFS4_LOCK_STID
)
3586 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3588 ret
= nfserr_locks_held
;
3591 ret
= nfserr_bad_stateid
;
3594 nfs4_unlock_state();
3601 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3602 RD_STATE
: WR_STATE
;
3605 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3607 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3608 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3611 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3614 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3616 * "Closed" stateid's exist *only* to return
3617 * nfserr_replay_me from the previous step.
3619 return nfserr_bad_stateid
;
3620 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3623 return nfs4_check_fh(current_fh
, stp
);
3627 * Checks for sequence id mutating operations.
3630 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3631 stateid_t
*stateid
, char typemask
,
3632 struct nfs4_ol_stateid
**stpp
,
3633 struct nfsd_net
*nn
)
3636 struct nfs4_stid
*s
;
3638 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3639 seqid
, STATEID_VAL(stateid
));
3642 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3643 cstate
->minorversion
, nn
);
3646 *stpp
= openlockstateid(s
);
3647 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3649 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3652 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3653 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3656 struct nfs4_openowner
*oo
;
3658 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3659 NFS4_OPEN_STID
, stpp
, nn
);
3662 oo
= openowner((*stpp
)->st_stateowner
);
3663 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3664 return nfserr_bad_stateid
;
3669 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3670 struct nfsd4_open_confirm
*oc
)
3673 struct nfs4_openowner
*oo
;
3674 struct nfs4_ol_stateid
*stp
;
3675 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3677 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3678 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3679 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3681 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3687 status
= nfs4_preprocess_seqid_op(cstate
,
3688 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3689 NFS4_OPEN_STID
, &stp
, nn
);
3692 oo
= openowner(stp
->st_stateowner
);
3693 status
= nfserr_bad_stateid
;
3694 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3696 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3697 update_stateid(&stp
->st_stid
.sc_stateid
);
3698 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3699 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3700 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3702 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3705 if (!cstate
->replay_owner
)
3706 nfs4_unlock_state();
3710 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3712 if (!test_access(access
, stp
))
3714 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3715 clear_access(access
, stp
);
3718 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3720 switch (to_access
) {
3721 case NFS4_SHARE_ACCESS_READ
:
3722 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3723 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3725 case NFS4_SHARE_ACCESS_WRITE
:
3726 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3727 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3729 case NFS4_SHARE_ACCESS_BOTH
:
3737 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3740 for (i
= 0; i
< 4; i
++) {
3741 if ((i
& deny
) != i
)
3747 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3748 struct nfsd4_compound_state
*cstate
,
3749 struct nfsd4_open_downgrade
*od
)
3752 struct nfs4_ol_stateid
*stp
;
3753 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3755 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3756 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3757 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3759 /* We don't yet support WANT bits: */
3760 if (od
->od_deleg_want
)
3761 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3765 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3766 &od
->od_stateid
, &stp
, nn
);
3769 status
= nfserr_inval
;
3770 if (!test_access(od
->od_share_access
, stp
)) {
3771 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3772 stp
->st_access_bmap
, od
->od_share_access
);
3775 if (!test_deny(od
->od_share_deny
, stp
)) {
3776 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3777 stp
->st_deny_bmap
, od
->od_share_deny
);
3780 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3782 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3784 update_stateid(&stp
->st_stid
.sc_stateid
);
3785 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3788 if (!cstate
->replay_owner
)
3789 nfs4_unlock_state();
3793 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3795 struct nfs4_openowner
*oo
;
3796 struct nfs4_ol_stateid
*s
;
3798 if (!so
->so_is_open_owner
)
3801 s
= oo
->oo_last_closed_stid
;
3804 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3805 /* Release the last_closed_stid on the next seqid bump: */
3806 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3809 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3810 release_last_closed_stateid(oo
);
3813 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3815 unhash_open_stateid(s
);
3816 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3820 * nfs4_unlock_state() called after encode
3823 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3824 struct nfsd4_close
*close
)
3827 struct nfs4_openowner
*oo
;
3828 struct nfs4_ol_stateid
*stp
;
3829 struct net
*net
= SVC_NET(rqstp
);
3830 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3832 dprintk("NFSD: nfsd4_close on file %.*s\n",
3833 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3834 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3837 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3839 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3843 oo
= openowner(stp
->st_stateowner
);
3845 update_stateid(&stp
->st_stid
.sc_stateid
);
3846 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3848 nfsd4_close_open_stateid(stp
);
3849 release_last_closed_stateid(oo
);
3850 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3851 oo
->oo_last_closed_stid
= stp
;
3853 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3854 if (cstate
->minorversion
) {
3855 release_openowner(oo
);
3856 cstate
->replay_owner
= NULL
;
3859 * In the 4.0 case we need to keep the owners around a
3860 * little while to handle CLOSE replay.
3862 if (list_empty(&oo
->oo_owner
.so_stateids
))
3863 move_to_close_lru(oo
, SVC_NET(rqstp
));
3867 if (!cstate
->replay_owner
)
3868 nfs4_unlock_state();
3873 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3874 struct nfsd4_delegreturn
*dr
)
3876 struct nfs4_delegation
*dp
;
3877 stateid_t
*stateid
= &dr
->dr_stateid
;
3878 struct nfs4_stid
*s
;
3880 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3882 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3886 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3887 cstate
->minorversion
, nn
);
3890 dp
= delegstateid(s
);
3891 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3895 unhash_delegation(dp
);
3897 nfs4_unlock_state();
3903 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3905 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3908 end_offset(u64 start
, u64 len
)
3913 return end
>= start
? end
: NFS4_MAX_UINT64
;
3916 /* last octet in a range */
3918 last_byte_offset(u64 start
, u64 len
)
3924 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3927 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3929 return (file_hashval(inode
) + cl_id
3930 + opaque_hashval(ownername
->data
, ownername
->len
))
3931 & LOCKOWNER_INO_HASH_MASK
;
3935 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3936 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3937 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3938 * locking, this prevents us from being completely protocol-compliant. The
3939 * real solution to this problem is to start using unsigned file offsets in
3940 * the VFS, but this is a very deep change!
3943 nfs4_transform_lock_offset(struct file_lock
*lock
)
3945 if (lock
->fl_start
< 0)
3946 lock
->fl_start
= OFFSET_MAX
;
3947 if (lock
->fl_end
< 0)
3948 lock
->fl_end
= OFFSET_MAX
;
3951 /* Hack!: For now, we're defining this just so we can use a pointer to it
3952 * as a unique cookie to identify our (NFSv4's) posix locks. */
3953 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3957 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3959 struct nfs4_lockowner
*lo
;
3961 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3962 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3963 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3964 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3965 if (!deny
->ld_owner
.data
)
3966 /* We just don't care that much */
3968 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3969 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3972 deny
->ld_owner
.len
= 0;
3973 deny
->ld_owner
.data
= NULL
;
3974 deny
->ld_clientid
.cl_boot
= 0;
3975 deny
->ld_clientid
.cl_id
= 0;
3977 deny
->ld_start
= fl
->fl_start
;
3978 deny
->ld_length
= NFS4_MAX_UINT64
;
3979 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3980 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3981 deny
->ld_type
= NFS4_READ_LT
;
3982 if (fl
->fl_type
!= F_RDLCK
)
3983 deny
->ld_type
= NFS4_WRITE_LT
;
3986 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3988 struct nfs4_ol_stateid
*lst
;
3990 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3992 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3993 struct nfs4_ol_stateid
, st_perstateowner
);
3994 return lst
->st_file
->fi_inode
== inode
;
3997 static struct nfs4_lockowner
*
3998 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3999 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4001 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4002 struct nfs4_lockowner
*lo
;
4004 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4005 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4011 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4013 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4014 unsigned int inohash
= lockowner_ino_hashval(inode
,
4015 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4016 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4018 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4019 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4020 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4024 * Alloc a lock owner structure.
4025 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4028 * strhashval = ownerstr_hashval
4031 static struct nfs4_lockowner
*
4032 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4033 struct nfs4_lockowner
*lo
;
4035 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4038 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4039 lo
->lo_owner
.so_is_open_owner
= 0;
4040 /* It is the openowner seqid that will be incremented in encode in the
4041 * case of new lockowners; so increment the lock seqid manually: */
4042 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4043 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4047 static struct nfs4_ol_stateid
*
4048 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4050 struct nfs4_ol_stateid
*stp
;
4051 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4053 stp
= nfs4_alloc_stateid(clp
);
4056 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4057 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4058 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4059 stp
->st_stateowner
= &lo
->lo_owner
;
4062 stp
->st_access_bmap
= 0;
4063 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4064 stp
->st_openstp
= open_stp
;
4069 check_lock_length(u64 offset
, u64 length
)
4071 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4072 LOFF_OVERFLOW(offset
, length
)));
4075 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4077 struct nfs4_file
*fp
= lock_stp
->st_file
;
4078 int oflag
= nfs4_access_to_omode(access
);
4080 if (test_access(access
, lock_stp
))
4082 nfs4_file_get_access(fp
, oflag
);
4083 set_access(access
, lock_stp
);
4086 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)
4088 struct nfs4_file
*fi
= ost
->st_file
;
4089 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4090 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4091 struct nfs4_lockowner
*lo
;
4092 unsigned int strhashval
;
4093 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4095 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4096 &lock
->v
.new.owner
, nn
);
4098 if (!cstate
->minorversion
)
4099 return nfserr_bad_seqid
;
4100 /* XXX: a lockowner always has exactly one stateid: */
4101 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4102 struct nfs4_ol_stateid
, st_perstateowner
);
4105 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4106 &lock
->v
.new.owner
);
4107 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4109 return nfserr_jukebox
;
4110 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4112 release_lockowner(lo
);
4113 return nfserr_jukebox
;
4123 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4124 struct nfsd4_lock
*lock
)
4126 struct nfs4_openowner
*open_sop
= NULL
;
4127 struct nfs4_lockowner
*lock_sop
= NULL
;
4128 struct nfs4_ol_stateid
*lock_stp
;
4129 struct file
*filp
= NULL
;
4130 struct file_lock
*file_lock
= NULL
;
4131 struct file_lock
*conflock
= NULL
;
4133 bool new_state
= false;
4136 struct net
*net
= SVC_NET(rqstp
);
4137 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4139 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4140 (long long) lock
->lk_offset
,
4141 (long long) lock
->lk_length
);
4143 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4144 return nfserr_inval
;
4146 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4147 S_IFREG
, NFSD_MAY_LOCK
))) {
4148 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4154 if (lock
->lk_is_new
) {
4155 struct nfs4_ol_stateid
*open_stp
= NULL
;
4157 if (nfsd4_has_session(cstate
))
4158 /* See rfc 5661 18.10.3: given clientid is ignored: */
4159 memcpy(&lock
->v
.new.clientid
,
4160 &cstate
->session
->se_client
->cl_clientid
,
4161 sizeof(clientid_t
));
4163 status
= nfserr_stale_clientid
;
4164 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4167 /* validate and update open stateid and open seqid */
4168 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4169 lock
->lk_new_open_seqid
,
4170 &lock
->lk_new_open_stateid
,
4174 open_sop
= openowner(open_stp
->st_stateowner
);
4175 status
= nfserr_bad_stateid
;
4176 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4177 &lock
->v
.new.clientid
))
4179 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4180 &lock_stp
, &new_state
);
4182 status
= nfs4_preprocess_seqid_op(cstate
,
4183 lock
->lk_old_lock_seqid
,
4184 &lock
->lk_old_lock_stateid
,
4185 NFS4_LOCK_STID
, &lock_stp
, nn
);
4188 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4190 lkflg
= setlkflg(lock
->lk_type
);
4191 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4195 status
= nfserr_grace
;
4196 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4198 status
= nfserr_no_grace
;
4199 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4202 file_lock
= locks_alloc_lock();
4204 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4205 status
= nfserr_jukebox
;
4209 locks_init_lock(file_lock
);
4210 switch (lock
->lk_type
) {
4213 filp
= find_readable_file(lock_stp
->st_file
);
4215 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4216 file_lock
->fl_type
= F_RDLCK
;
4219 case NFS4_WRITEW_LT
:
4220 filp
= find_writeable_file(lock_stp
->st_file
);
4222 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4223 file_lock
->fl_type
= F_WRLCK
;
4226 status
= nfserr_inval
;
4230 status
= nfserr_openmode
;
4233 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4234 file_lock
->fl_pid
= current
->tgid
;
4235 file_lock
->fl_file
= filp
;
4236 file_lock
->fl_flags
= FL_POSIX
;
4237 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4238 file_lock
->fl_start
= lock
->lk_offset
;
4239 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4240 nfs4_transform_lock_offset(file_lock
);
4242 conflock
= locks_alloc_lock();
4244 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4245 status
= nfserr_jukebox
;
4249 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4251 case 0: /* success! */
4252 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4253 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4257 case (EAGAIN
): /* conflock holds conflicting lock */
4258 status
= nfserr_denied
;
4259 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4260 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4263 status
= nfserr_deadlock
;
4266 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4267 status
= nfserrno(err
);
4271 if (status
&& new_state
)
4272 release_lockowner(lock_sop
);
4273 if (!cstate
->replay_owner
)
4274 nfs4_unlock_state();
4276 locks_free_lock(file_lock
);
4278 locks_free_lock(conflock
);
4283 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4284 * so we do a temporary open here just to get an open file to pass to
4285 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4288 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4291 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4293 err
= nfserrno(vfs_test_lock(file
, lock
));
4303 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4304 struct nfsd4_lockt
*lockt
)
4306 struct inode
*inode
;
4307 struct file_lock
*file_lock
= NULL
;
4308 struct nfs4_lockowner
*lo
;
4310 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4312 if (locks_in_grace(SVC_NET(rqstp
)))
4313 return nfserr_grace
;
4315 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4316 return nfserr_inval
;
4320 if (!nfsd4_has_session(cstate
)) {
4321 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4326 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4329 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4330 file_lock
= locks_alloc_lock();
4332 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4333 status
= nfserr_jukebox
;
4336 locks_init_lock(file_lock
);
4337 switch (lockt
->lt_type
) {
4340 file_lock
->fl_type
= F_RDLCK
;
4343 case NFS4_WRITEW_LT
:
4344 file_lock
->fl_type
= F_WRLCK
;
4347 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4348 status
= nfserr_inval
;
4352 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4354 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4355 file_lock
->fl_pid
= current
->tgid
;
4356 file_lock
->fl_flags
= FL_POSIX
;
4358 file_lock
->fl_start
= lockt
->lt_offset
;
4359 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4361 nfs4_transform_lock_offset(file_lock
);
4363 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4367 if (file_lock
->fl_type
!= F_UNLCK
) {
4368 status
= nfserr_denied
;
4369 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4372 nfs4_unlock_state();
4374 locks_free_lock(file_lock
);
4379 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4380 struct nfsd4_locku
*locku
)
4382 struct nfs4_ol_stateid
*stp
;
4383 struct file
*filp
= NULL
;
4384 struct file_lock
*file_lock
= NULL
;
4387 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4389 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4390 (long long) locku
->lu_offset
,
4391 (long long) locku
->lu_length
);
4393 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4394 return nfserr_inval
;
4398 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4399 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4403 filp
= find_any_file(stp
->st_file
);
4405 status
= nfserr_lock_range
;
4408 file_lock
= locks_alloc_lock();
4410 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4411 status
= nfserr_jukebox
;
4414 locks_init_lock(file_lock
);
4415 file_lock
->fl_type
= F_UNLCK
;
4416 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4417 file_lock
->fl_pid
= current
->tgid
;
4418 file_lock
->fl_file
= filp
;
4419 file_lock
->fl_flags
= FL_POSIX
;
4420 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4421 file_lock
->fl_start
= locku
->lu_offset
;
4423 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4425 nfs4_transform_lock_offset(file_lock
);
4428 * Try to unlock the file in the VFS.
4430 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4432 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4436 * OK, unlock succeeded; the only thing left to do is update the stateid.
4438 update_stateid(&stp
->st_stid
.sc_stateid
);
4439 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4442 if (!cstate
->replay_owner
)
4443 nfs4_unlock_state();
4445 locks_free_lock(file_lock
);
4449 status
= nfserrno(err
);
4455 * 1: locks held by lockowner
4456 * 0: no locks held by lockowner
4459 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4461 struct file_lock
**flpp
;
4462 struct inode
*inode
= filp
->fi_inode
;
4466 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4467 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4478 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4479 struct nfsd4_compound_state
*cstate
,
4480 struct nfsd4_release_lockowner
*rlockowner
)
4482 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4483 struct nfs4_stateowner
*sop
;
4484 struct nfs4_lockowner
*lo
;
4485 struct nfs4_ol_stateid
*stp
;
4486 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4487 struct list_head matches
;
4488 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4490 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4492 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4493 clid
->cl_boot
, clid
->cl_id
);
4497 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4501 status
= nfserr_locks_held
;
4502 INIT_LIST_HEAD(&matches
);
4504 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4505 if (sop
->so_is_open_owner
)
4507 if (!same_owner_str(sop
, owner
, clid
))
4509 list_for_each_entry(stp
, &sop
->so_stateids
,
4511 lo
= lockowner(sop
);
4512 if (check_for_locks(stp
->st_file
, lo
))
4514 list_add(&lo
->lo_list
, &matches
);
4517 /* Clients probably won't expect us to return with some (but not all)
4518 * of the lockowner state released; so don't release any until all
4519 * have been checked. */
4521 while (!list_empty(&matches
)) {
4522 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4524 /* unhash_stateowner deletes so_perclient only
4525 * for openowners. */
4526 list_del(&lo
->lo_list
);
4527 release_lockowner(lo
);
4530 nfs4_unlock_state();
4534 static inline struct nfs4_client_reclaim
*
4537 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4541 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4543 struct nfs4_client_reclaim
*crp
;
4545 crp
= nfsd4_find_reclaim_client(name
, nn
);
4546 return (crp
&& crp
->cr_clp
);
4550 * failure => all reset bets are off, nfserr_no_grace...
4552 struct nfs4_client_reclaim
*
4553 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4555 unsigned int strhashval
;
4556 struct nfs4_client_reclaim
*crp
;
4558 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4559 crp
= alloc_reclaim();
4561 strhashval
= clientstr_hashval(name
);
4562 INIT_LIST_HEAD(&crp
->cr_strhash
);
4563 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4564 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4566 nn
->reclaim_str_hashtbl_size
++;
4572 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4574 list_del(&crp
->cr_strhash
);
4576 nn
->reclaim_str_hashtbl_size
--;
4580 nfs4_release_reclaim(struct nfsd_net
*nn
)
4582 struct nfs4_client_reclaim
*crp
= NULL
;
4585 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4586 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4587 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4588 struct nfs4_client_reclaim
, cr_strhash
);
4589 nfs4_remove_reclaim_record(crp
, nn
);
4592 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4596 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4597 struct nfs4_client_reclaim
*
4598 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4600 unsigned int strhashval
;
4601 struct nfs4_client_reclaim
*crp
= NULL
;
4603 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4605 strhashval
= clientstr_hashval(recdir
);
4606 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4607 if (same_name(crp
->cr_recdir
, recdir
)) {
4615 * Called from OPEN. Look for clientid in reclaim list.
4618 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4620 struct nfs4_client
*clp
;
4622 /* find clientid in conf_id_hashtbl */
4623 clp
= find_confirmed_client(clid
, sessions
, nn
);
4625 return nfserr_reclaim_bad
;
4627 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4630 #ifdef CONFIG_NFSD_FAULT_INJECTION
4632 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4634 if (mark_client_expired(clp
))
4640 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4642 char buf
[INET6_ADDRSTRLEN
];
4643 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4644 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4648 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4651 char buf
[INET6_ADDRSTRLEN
];
4652 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4653 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4656 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4658 struct nfs4_openowner
*oop
;
4659 struct nfs4_lockowner
*lop
, *lo_next
;
4660 struct nfs4_ol_stateid
*stp
, *st_next
;
4663 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4664 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4665 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4677 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4679 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4682 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4684 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4685 nfsd_print_count(clp
, count
, "locked files");
4689 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4691 struct nfs4_openowner
*oop
, *next
;
4694 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4704 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4706 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4709 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4711 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4712 nfsd_print_count(clp
, count
, "open files");
4716 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4717 struct list_head
*victims
)
4719 struct nfs4_delegation
*dp
, *next
;
4722 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4724 list_move(&dp
->dl_recall_lru
, victims
);
4731 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4733 struct nfs4_delegation
*dp
, *next
;
4737 spin_lock(&recall_lock
);
4738 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4739 spin_unlock(&recall_lock
);
4741 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4742 unhash_delegation(dp
);
4747 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4749 struct nfs4_delegation
*dp
, *next
;
4753 spin_lock(&recall_lock
);
4754 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4755 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4756 nfsd_break_one_deleg(dp
);
4757 spin_unlock(&recall_lock
);
4762 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4766 spin_lock(&recall_lock
);
4767 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4768 spin_unlock(&recall_lock
);
4770 nfsd_print_count(clp
, count
, "delegations");
4774 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4776 struct nfs4_client
*clp
, *next
;
4778 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4780 if (!nfsd_netns_ready(nn
))
4783 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4784 count
+= func(clp
, max
- count
);
4785 if ((max
!= 0) && (count
>= max
))
4792 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4794 struct nfs4_client
*clp
;
4795 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4797 if (!nfsd_netns_ready(nn
))
4800 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4801 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4807 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4809 /* initialization to perform at module load time: */
4812 nfs4_state_init(void)
4817 * Since the lifetime of a delegation isn't limited to that of an open, a
4818 * client may quite reasonably hang on to a delegation as long as it has
4819 * the inode cached. This becomes an obvious problem the first time a
4820 * client's inode cache approaches the size of the server's total memory.
4822 * For now we avoid this problem by imposing a hard limit on the number
4823 * of delegations, which varies according to the server's memory size.
4826 set_max_delegations(void)
4829 * Allow at most 4 delegations per megabyte of RAM. Quick
4830 * estimates suggest that in the worst case (where every delegation
4831 * is for a different inode), a delegation could take about 1.5K,
4832 * giving a worst case usage of about 6% of memory.
4834 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4837 static int nfs4_state_create_net(struct net
*net
)
4839 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4842 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4843 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4844 if (!nn
->conf_id_hashtbl
)
4846 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4847 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4848 if (!nn
->unconf_id_hashtbl
)
4850 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4851 OWNER_HASH_SIZE
, GFP_KERNEL
);
4852 if (!nn
->ownerstr_hashtbl
)
4854 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4855 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4856 if (!nn
->lockowner_ino_hashtbl
)
4857 goto err_lockowner_ino
;
4858 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4859 SESSION_HASH_SIZE
, GFP_KERNEL
);
4860 if (!nn
->sessionid_hashtbl
)
4863 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4864 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4865 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4867 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4868 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4869 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4870 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4871 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4872 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4873 nn
->conf_name_tree
= RB_ROOT
;
4874 nn
->unconf_name_tree
= RB_ROOT
;
4875 INIT_LIST_HEAD(&nn
->client_lru
);
4876 INIT_LIST_HEAD(&nn
->close_lru
);
4877 INIT_LIST_HEAD(&nn
->del_recall_lru
);
4878 spin_lock_init(&nn
->client_lock
);
4880 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4886 kfree(nn
->lockowner_ino_hashtbl
);
4888 kfree(nn
->ownerstr_hashtbl
);
4890 kfree(nn
->unconf_id_hashtbl
);
4892 kfree(nn
->conf_id_hashtbl
);
4898 nfs4_state_destroy_net(struct net
*net
)
4901 struct nfs4_client
*clp
= NULL
;
4902 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4903 struct rb_node
*node
, *tmp
;
4905 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4906 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4907 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4908 destroy_client(clp
);
4912 node
= rb_first(&nn
->unconf_name_tree
);
4913 while (node
!= NULL
) {
4915 node
= rb_next(tmp
);
4916 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4917 rb_erase(tmp
, &nn
->unconf_name_tree
);
4918 destroy_client(clp
);
4921 kfree(nn
->sessionid_hashtbl
);
4922 kfree(nn
->lockowner_ino_hashtbl
);
4923 kfree(nn
->ownerstr_hashtbl
);
4924 kfree(nn
->unconf_id_hashtbl
);
4925 kfree(nn
->conf_id_hashtbl
);
4930 nfs4_state_start_net(struct net
*net
)
4932 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4935 ret
= nfs4_state_create_net(net
);
4938 nfsd4_client_tracking_init(net
);
4939 nn
->boot_time
= get_seconds();
4940 locks_start_grace(net
, &nn
->nfsd4_manager
);
4941 nn
->grace_ended
= false;
4942 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
4943 nn
->nfsd4_grace
, net
);
4944 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
4948 /* initialization to perform when the nfsd service is started: */
4951 nfs4_state_start(void)
4955 ret
= set_callback_cred();
4958 laundry_wq
= create_singlethread_workqueue("nfsd4");
4959 if (laundry_wq
== NULL
) {
4963 ret
= nfsd4_create_callback_queue();
4965 goto out_free_laundry
;
4967 set_max_delegations();
4972 destroy_workqueue(laundry_wq
);
4977 /* should be called with the state lock held */
4979 nfs4_state_shutdown_net(struct net
*net
)
4981 struct nfs4_delegation
*dp
= NULL
;
4982 struct list_head
*pos
, *next
, reaplist
;
4983 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4985 cancel_delayed_work_sync(&nn
->laundromat_work
);
4986 locks_end_grace(&nn
->nfsd4_manager
);
4988 INIT_LIST_HEAD(&reaplist
);
4989 spin_lock(&recall_lock
);
4990 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4991 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4992 list_move(&dp
->dl_recall_lru
, &reaplist
);
4994 spin_unlock(&recall_lock
);
4995 list_for_each_safe(pos
, next
, &reaplist
) {
4996 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4997 unhash_delegation(dp
);
5000 nfsd4_client_tracking_exit(net
);
5001 nfs4_state_destroy_net(net
);
5005 nfs4_state_shutdown(void)
5007 destroy_workqueue(laundry_wq
);
5008 nfsd4_destroy_callback_queue();
5012 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5014 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5015 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5019 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5021 if (cstate
->minorversion
) {
5022 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5023 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5028 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5030 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5034 * functions to set current state id
5037 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5039 put_stateid(cstate
, &odp
->od_stateid
);
5043 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5045 put_stateid(cstate
, &open
->op_stateid
);
5049 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5051 put_stateid(cstate
, &close
->cl_stateid
);
5055 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5057 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5061 * functions to consume current state id
5065 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5067 get_stateid(cstate
, &odp
->od_stateid
);
5071 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5073 get_stateid(cstate
, &drp
->dr_stateid
);
5077 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5079 get_stateid(cstate
, &fsp
->fr_stateid
);
5083 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5085 get_stateid(cstate
, &setattr
->sa_stateid
);
5089 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5091 get_stateid(cstate
, &close
->cl_stateid
);
5095 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5097 get_stateid(cstate
, &locku
->lu_stateid
);
5101 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5103 get_stateid(cstate
, &read
->rd_stateid
);
5107 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5109 get_stateid(cstate
, &write
->wr_stateid
);