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 kref
*);
99 /* Must be called under the client_lock */
100 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
102 kref_put(&ses
->se_ref
, free_session
);
105 static void nfsd4_get_session(struct nfsd4_session
*ses
)
107 kref_get(&ses
->se_ref
);
111 nfs4_unlock_state(void)
113 mutex_unlock(&client_mutex
);
117 opaque_hashval(const void *ptr
, int nbytes
)
119 unsigned char *cptr
= (unsigned char *) ptr
;
129 static struct list_head del_recall_lru
;
131 static void nfsd4_free_file(struct nfs4_file
*f
)
133 kmem_cache_free(file_slab
, f
);
137 put_nfs4_file(struct nfs4_file
*fi
)
139 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
140 list_del(&fi
->fi_hash
);
141 spin_unlock(&recall_lock
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 atomic_inc(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned long max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for lock and open owners */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
169 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
171 return ret
& OWNER_HASH_MASK
;
174 /* hash table for nfs4_file */
175 #define FILE_HASH_BITS 8
176 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
178 static unsigned int file_hashval(struct inode
*ino
)
180 /* XXX: why are we hashing on inode pointer, anyway? */
181 return hash_ptr(ino
, FILE_HASH_BITS
);
184 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
186 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
188 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
189 atomic_inc(&fp
->fi_access
[oflag
]);
192 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
194 if (oflag
== O_RDWR
) {
195 __nfs4_file_get_access(fp
, O_RDONLY
);
196 __nfs4_file_get_access(fp
, O_WRONLY
);
198 __nfs4_file_get_access(fp
, oflag
);
201 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
203 if (fp
->fi_fds
[oflag
]) {
204 fput(fp
->fi_fds
[oflag
]);
205 fp
->fi_fds
[oflag
] = NULL
;
209 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
211 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
212 nfs4_file_put_fd(fp
, oflag
);
214 * It's also safe to get rid of the RDWR open *if*
215 * we no longer have need of the other kind of access
216 * or if we already have the other kind of open:
218 if (fp
->fi_fds
[1-oflag
]
219 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
220 nfs4_file_put_fd(fp
, O_RDWR
);
224 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
226 if (oflag
== O_RDWR
) {
227 __nfs4_file_put_access(fp
, O_RDONLY
);
228 __nfs4_file_put_access(fp
, O_WRONLY
);
230 __nfs4_file_put_access(fp
, oflag
);
233 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
236 struct idr
*stateids
= &cl
->cl_stateids
;
237 static int min_stateid
= 0;
238 struct nfs4_stid
*stid
;
241 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
245 new_id
= idr_alloc(stateids
, stid
, min_stateid
, 0, GFP_KERNEL
);
248 stid
->sc_client
= cl
;
250 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
251 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
252 /* Will be incremented before return to client: */
253 stid
->sc_stateid
.si_generation
= 0;
256 * It shouldn't be a problem to reuse an opaque stateid value.
257 * I don't think it is for 4.1. But with 4.0 I worry that, for
258 * example, a stray write retransmission could be accepted by
259 * the server when it should have been rejected. Therefore,
260 * adopt a trick from the sctp code to attempt to maximize the
261 * amount of time until an id is reused, by ensuring they always
262 * "increase" (mod INT_MAX):
265 min_stateid
= new_id
+1;
266 if (min_stateid
== INT_MAX
)
274 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
276 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
279 static struct nfs4_delegation
*
280 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
282 struct nfs4_delegation
*dp
;
283 struct nfs4_file
*fp
= stp
->st_file
;
285 dprintk("NFSD alloc_init_deleg\n");
287 * Major work on the lease subsystem (for example, to support
288 * calbacks on stat) will be required before we can support
289 * write delegations properly.
291 if (type
!= NFS4_OPEN_DELEGATE_READ
)
293 if (fp
->fi_had_conflict
)
295 if (num_delegations
> max_delegations
)
297 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
300 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
302 * delegation seqid's are never incremented. The 4.1 special
303 * meaning of seqid 0 isn't meaningful, really, but let's avoid
304 * 0 anyway just for consistency and use 1:
306 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
308 INIT_LIST_HEAD(&dp
->dl_perfile
);
309 INIT_LIST_HEAD(&dp
->dl_perclnt
);
310 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
314 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
316 atomic_set(&dp
->dl_count
, 1);
317 nfsd4_init_callback(&dp
->dl_recall
);
321 static void free_stid(struct nfs4_stid
*s
, struct kmem_cache
*slab
)
323 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
325 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
326 kmem_cache_free(slab
, s
);
330 nfs4_put_delegation(struct nfs4_delegation
*dp
)
332 if (atomic_dec_and_test(&dp
->dl_count
)) {
333 dprintk("NFSD: freeing dp %p\n",dp
);
334 put_nfs4_file(dp
->dl_file
);
335 free_stid(&dp
->dl_stid
, deleg_slab
);
340 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
342 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
343 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
345 fput(fp
->fi_deleg_file
);
346 fp
->fi_deleg_file
= NULL
;
350 static void unhash_stid(struct nfs4_stid
*s
)
355 /* Called under the state lock. */
357 unhash_delegation(struct nfs4_delegation
*dp
)
359 unhash_stid(&dp
->dl_stid
);
360 list_del_init(&dp
->dl_perclnt
);
361 spin_lock(&recall_lock
);
362 list_del_init(&dp
->dl_perfile
);
363 list_del_init(&dp
->dl_recall_lru
);
364 spin_unlock(&recall_lock
);
365 nfs4_put_deleg_lease(dp
->dl_file
);
366 nfs4_put_delegation(dp
);
373 static unsigned int clientid_hashval(u32 id
)
375 return id
& CLIENT_HASH_MASK
;
378 static unsigned int clientstr_hashval(const char *name
)
380 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
384 * We store the NONE, READ, WRITE, and BOTH bits separately in the
385 * st_{access,deny}_bmap field of the stateid, in order to track not
386 * only what share bits are currently in force, but also what
387 * combinations of share bits previous opens have used. This allows us
388 * to enforce the recommendation of rfc 3530 14.2.19 that the server
389 * return an error if the client attempt to downgrade to a combination
390 * of share bits not explicable by closing some of its previous opens.
392 * XXX: This enforcement is actually incomplete, since we don't keep
393 * track of access/deny bit combinations; so, e.g., we allow:
395 * OPEN allow read, deny write
396 * OPEN allow both, deny none
397 * DOWNGRADE allow read, deny none
399 * which we should reject.
402 bmap_to_share_mode(unsigned long bmap
) {
404 unsigned int access
= 0;
406 for (i
= 1; i
< 4; i
++) {
407 if (test_bit(i
, &bmap
))
414 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
415 unsigned int access
, deny
;
417 access
= bmap_to_share_mode(stp
->st_access_bmap
);
418 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
419 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
424 /* set share access for a given stateid */
426 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
428 __set_bit(access
, &stp
->st_access_bmap
);
431 /* clear share access for a given stateid */
433 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
435 __clear_bit(access
, &stp
->st_access_bmap
);
438 /* test whether a given stateid has access */
440 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
442 return test_bit(access
, &stp
->st_access_bmap
);
445 /* set share deny for a given stateid */
447 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
449 __set_bit(access
, &stp
->st_deny_bmap
);
452 /* clear share deny for a given stateid */
454 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
456 __clear_bit(access
, &stp
->st_deny_bmap
);
459 /* test whether a given stateid is denying specific access */
461 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
463 return test_bit(access
, &stp
->st_deny_bmap
);
466 static int nfs4_access_to_omode(u32 access
)
468 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
469 case NFS4_SHARE_ACCESS_READ
:
471 case NFS4_SHARE_ACCESS_WRITE
:
473 case NFS4_SHARE_ACCESS_BOTH
:
480 /* release all access and file references for a given stateid */
482 release_all_access(struct nfs4_ol_stateid
*stp
)
486 for (i
= 1; i
< 4; i
++) {
487 if (test_access(i
, stp
))
488 nfs4_file_put_access(stp
->st_file
,
489 nfs4_access_to_omode(i
));
490 clear_access(i
, stp
);
494 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
496 list_del(&stp
->st_perfile
);
497 list_del(&stp
->st_perstateowner
);
500 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
502 release_all_access(stp
);
503 put_nfs4_file(stp
->st_file
);
507 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
509 free_stid(&stp
->st_stid
, stateid_slab
);
512 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
516 unhash_generic_stateid(stp
);
517 unhash_stid(&stp
->st_stid
);
518 file
= find_any_file(stp
->st_file
);
520 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
521 close_generic_stateid(stp
);
522 free_generic_stateid(stp
);
525 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
527 struct nfs4_ol_stateid
*stp
;
529 list_del(&lo
->lo_owner
.so_strhash
);
530 list_del(&lo
->lo_perstateid
);
531 list_del(&lo
->lo_owner_ino_hash
);
532 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
533 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
534 struct nfs4_ol_stateid
, st_perstateowner
);
535 release_lock_stateid(stp
);
539 static void release_lockowner(struct nfs4_lockowner
*lo
)
541 unhash_lockowner(lo
);
542 nfs4_free_lockowner(lo
);
546 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
548 struct nfs4_lockowner
*lo
;
550 while (!list_empty(&open_stp
->st_lockowners
)) {
551 lo
= list_entry(open_stp
->st_lockowners
.next
,
552 struct nfs4_lockowner
, lo_perstateid
);
553 release_lockowner(lo
);
557 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
559 unhash_generic_stateid(stp
);
560 release_stateid_lockowners(stp
);
561 close_generic_stateid(stp
);
564 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
566 unhash_open_stateid(stp
);
567 unhash_stid(&stp
->st_stid
);
568 free_generic_stateid(stp
);
571 static void unhash_openowner(struct nfs4_openowner
*oo
)
573 struct nfs4_ol_stateid
*stp
;
575 list_del(&oo
->oo_owner
.so_strhash
);
576 list_del(&oo
->oo_perclient
);
577 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
578 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
579 struct nfs4_ol_stateid
, st_perstateowner
);
580 release_open_stateid(stp
);
584 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
586 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
589 unhash_stid(&s
->st_stid
);
590 free_generic_stateid(s
);
591 oo
->oo_last_closed_stid
= NULL
;
595 static void release_openowner(struct nfs4_openowner
*oo
)
597 unhash_openowner(oo
);
598 list_del(&oo
->oo_close_lru
);
599 release_last_closed_stateid(oo
);
600 nfs4_free_openowner(oo
);
604 hash_sessionid(struct nfs4_sessionid
*sessionid
)
606 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
608 return sid
->sequence
% SESSION_HASH_SIZE
;
613 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
615 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
616 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
620 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
627 gen_sessionid(struct nfsd4_session
*ses
)
629 struct nfs4_client
*clp
= ses
->se_client
;
630 struct nfsd4_sessionid
*sid
;
632 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
633 sid
->clientid
= clp
->cl_clientid
;
634 sid
->sequence
= current_sessionid
++;
639 * The protocol defines ca_maxresponssize_cached to include the size of
640 * the rpc header, but all we need to cache is the data starting after
641 * the end of the initial SEQUENCE operation--the rest we regenerate
642 * each time. Therefore we can advertise a ca_maxresponssize_cached
643 * value that is the number of bytes in our cache plus a few additional
644 * bytes. In order to stay on the safe side, and not promise more than
645 * we can cache, those additional bytes must be the minimum possible: 24
646 * bytes of rpc header (xid through accept state, with AUTH_NULL
647 * verifier), 12 for the compound header (with zero-length tag), and 44
648 * for the SEQUENCE op response:
650 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
653 free_session_slots(struct nfsd4_session
*ses
)
657 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
658 kfree(ses
->se_slots
[i
]);
662 * We don't actually need to cache the rpc and session headers, so we
663 * can allocate a little less for each slot:
665 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
667 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
670 static int nfsd4_sanitize_slot_size(u32 size
)
672 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
673 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
679 * XXX: If we run out of reserved DRC memory we could (up to a point)
680 * re-negotiate active sessions and reduce their slot usage to make
681 * room for new connections. For now we just fail the create session.
683 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
687 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
689 spin_lock(&nfsd_drc_lock
);
690 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
691 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
692 num
= min_t(int, num
, avail
/ slotsize
);
693 nfsd_drc_mem_used
+= num
* slotsize
;
694 spin_unlock(&nfsd_drc_lock
);
699 static void nfsd4_put_drc_mem(int slotsize
, int num
)
701 spin_lock(&nfsd_drc_lock
);
702 nfsd_drc_mem_used
-= slotsize
* num
;
703 spin_unlock(&nfsd_drc_lock
);
706 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
708 struct nfsd4_session
*new;
711 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
712 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
713 mem
= numslots
* sizeof(struct nfsd4_slot
*);
715 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
718 /* allocate each struct nfsd4_slot and data cache in one piece */
719 for (i
= 0; i
< numslots
; i
++) {
720 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
721 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
722 if (!new->se_slots
[i
])
728 kfree(new->se_slots
[i
]);
733 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new,
734 struct nfsd4_channel_attrs
*req
,
735 int numslots
, int slotsize
,
738 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
740 new->maxreqs
= numslots
;
741 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
742 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
743 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
744 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
745 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
748 static void free_conn(struct nfsd4_conn
*c
)
750 svc_xprt_put(c
->cn_xprt
);
754 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
756 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
757 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
759 spin_lock(&clp
->cl_lock
);
760 if (!list_empty(&c
->cn_persession
)) {
761 list_del(&c
->cn_persession
);
764 nfsd4_probe_callback(clp
);
765 spin_unlock(&clp
->cl_lock
);
768 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
770 struct nfsd4_conn
*conn
;
772 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
775 svc_xprt_get(rqstp
->rq_xprt
);
776 conn
->cn_xprt
= rqstp
->rq_xprt
;
777 conn
->cn_flags
= flags
;
778 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
782 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
784 conn
->cn_session
= ses
;
785 list_add(&conn
->cn_persession
, &ses
->se_conns
);
788 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
790 struct nfs4_client
*clp
= ses
->se_client
;
792 spin_lock(&clp
->cl_lock
);
793 __nfsd4_hash_conn(conn
, ses
);
794 spin_unlock(&clp
->cl_lock
);
797 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
799 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
800 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
803 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
807 nfsd4_hash_conn(conn
, ses
);
808 ret
= nfsd4_register_conn(conn
);
810 /* oops; xprt is already down: */
811 nfsd4_conn_lost(&conn
->cn_xpt_user
);
812 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
813 /* callback channel may be back up */
814 nfsd4_probe_callback(ses
->se_client
);
818 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
820 u32 dir
= NFS4_CDFC4_FORE
;
822 if (cses
->flags
& SESSION4_BACK_CHAN
)
823 dir
|= NFS4_CDFC4_BACK
;
824 return alloc_conn(rqstp
, dir
);
827 /* must be called under client_lock */
828 static void nfsd4_del_conns(struct nfsd4_session
*s
)
830 struct nfs4_client
*clp
= s
->se_client
;
831 struct nfsd4_conn
*c
;
833 spin_lock(&clp
->cl_lock
);
834 while (!list_empty(&s
->se_conns
)) {
835 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
836 list_del_init(&c
->cn_persession
);
837 spin_unlock(&clp
->cl_lock
);
839 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
842 spin_lock(&clp
->cl_lock
);
844 spin_unlock(&clp
->cl_lock
);
847 static void __free_session(struct nfsd4_session
*ses
)
849 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
850 free_session_slots(ses
);
854 static void free_session(struct kref
*kref
)
856 struct nfsd4_session
*ses
;
859 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
860 nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
862 lockdep_assert_held(&nn
->client_lock
);
863 nfsd4_del_conns(ses
);
867 static void nfsd4_put_session(struct nfsd4_session
*ses
)
869 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
871 spin_lock(&nn
->client_lock
);
872 nfsd4_put_session_locked(ses
);
873 spin_unlock(&nn
->client_lock
);
876 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
,
879 struct nfsd4_session
*new;
880 int numslots
, slotsize
;
882 * Note decreasing slot size below client's request may
883 * make it difficult for client to function correctly, whereas
884 * decreasing the number of slots will (just?) affect
885 * performance. When short on memory we therefore prefer to
886 * decrease number of slots instead of their size.
888 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
889 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
893 new = __alloc_session(slotsize
, numslots
);
895 nfsd4_put_drc_mem(slotsize
, numslots
);
898 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
, nn
);
902 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
905 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
907 new->se_client
= clp
;
910 INIT_LIST_HEAD(&new->se_conns
);
912 new->se_cb_seq_nr
= 1;
913 new->se_flags
= cses
->flags
;
914 new->se_cb_prog
= cses
->callback_prog
;
915 new->se_cb_sec
= cses
->cb_sec
;
916 kref_init(&new->se_ref
);
917 idx
= hash_sessionid(&new->se_sessionid
);
918 spin_lock(&nn
->client_lock
);
919 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
920 spin_lock(&clp
->cl_lock
);
921 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
922 spin_unlock(&clp
->cl_lock
);
923 spin_unlock(&nn
->client_lock
);
925 if (cses
->flags
& SESSION4_BACK_CHAN
) {
926 struct sockaddr
*sa
= svc_addr(rqstp
);
928 * This is a little silly; with sessions there's no real
929 * use for the callback address. Use the peer address
930 * as a reasonable default for now, but consider fixing
931 * the rpc client not to require an address in the
934 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
935 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
939 /* caller must hold client_lock */
940 static struct nfsd4_session
*
941 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
943 struct nfsd4_session
*elem
;
945 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
947 dump_sessionid(__func__
, sessionid
);
948 idx
= hash_sessionid(sessionid
);
949 /* Search in the appropriate list */
950 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
951 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
952 NFS4_MAX_SESSIONID_LEN
)) {
957 dprintk("%s: session not found\n", __func__
);
961 /* caller must hold client_lock */
963 unhash_session(struct nfsd4_session
*ses
)
965 list_del(&ses
->se_hash
);
966 spin_lock(&ses
->se_client
->cl_lock
);
967 list_del(&ses
->se_perclnt
);
968 spin_unlock(&ses
->se_client
->cl_lock
);
971 /* must be called under the client_lock */
973 renew_client_locked(struct nfs4_client
*clp
)
975 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
977 if (is_client_expired(clp
)) {
979 printk("%s: client (clientid %08x/%08x) already expired\n",
981 clp
->cl_clientid
.cl_boot
,
982 clp
->cl_clientid
.cl_id
);
986 dprintk("renewing client (clientid %08x/%08x)\n",
987 clp
->cl_clientid
.cl_boot
,
988 clp
->cl_clientid
.cl_id
);
989 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
990 clp
->cl_time
= get_seconds();
994 renew_client(struct nfs4_client
*clp
)
996 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
998 spin_lock(&nn
->client_lock
);
999 renew_client_locked(clp
);
1000 spin_unlock(&nn
->client_lock
);
1003 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1005 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1007 if (clid
->cl_boot
== nn
->boot_time
)
1009 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1010 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1015 * XXX Should we use a slab cache ?
1016 * This type of memory management is somewhat inefficient, but we use it
1017 * anyway since SETCLIENTID is not a common operation.
1019 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1021 struct nfs4_client
*clp
;
1023 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1026 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1027 if (clp
->cl_name
.data
== NULL
) {
1031 clp
->cl_name
.len
= name
.len
;
1036 free_client(struct nfs4_client
*clp
)
1038 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1040 lockdep_assert_held(&nn
->client_lock
);
1041 while (!list_empty(&clp
->cl_sessions
)) {
1042 struct nfsd4_session
*ses
;
1043 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1045 list_del(&ses
->se_perclnt
);
1046 nfsd4_put_session_locked(ses
);
1048 free_svc_cred(&clp
->cl_cred
);
1049 kfree(clp
->cl_name
.data
);
1050 idr_destroy(&clp
->cl_stateids
);
1055 release_session_client(struct nfsd4_session
*session
)
1057 struct nfs4_client
*clp
= session
->se_client
;
1058 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1060 nfsd4_put_session(session
);
1061 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
1064 * At this point we also know all sessions have refcnt 1,
1065 * so free_client will delete them all if necessary:
1067 if (is_client_expired(clp
))
1070 renew_client_locked(clp
);
1071 spin_unlock(&nn
->client_lock
);
1074 /* must be called under the client_lock */
1076 unhash_client_locked(struct nfs4_client
*clp
)
1078 struct nfsd4_session
*ses
;
1080 mark_client_expired(clp
);
1081 list_del(&clp
->cl_lru
);
1082 spin_lock(&clp
->cl_lock
);
1083 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1084 list_del_init(&ses
->se_hash
);
1085 spin_unlock(&clp
->cl_lock
);
1089 destroy_client(struct nfs4_client
*clp
)
1091 struct nfs4_openowner
*oo
;
1092 struct nfs4_delegation
*dp
;
1093 struct list_head reaplist
;
1094 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1096 INIT_LIST_HEAD(&reaplist
);
1097 spin_lock(&recall_lock
);
1098 while (!list_empty(&clp
->cl_delegations
)) {
1099 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1100 list_del_init(&dp
->dl_perclnt
);
1101 list_move(&dp
->dl_recall_lru
, &reaplist
);
1103 spin_unlock(&recall_lock
);
1104 while (!list_empty(&reaplist
)) {
1105 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1106 unhash_delegation(dp
);
1108 while (!list_empty(&clp
->cl_openowners
)) {
1109 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1110 release_openowner(oo
);
1112 nfsd4_shutdown_callback(clp
);
1113 if (clp
->cl_cb_conn
.cb_xprt
)
1114 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1115 list_del(&clp
->cl_idhash
);
1116 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1117 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1119 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1120 spin_lock(&nn
->client_lock
);
1121 unhash_client_locked(clp
);
1122 if (atomic_read(&clp
->cl_refcount
) == 0)
1124 spin_unlock(&nn
->client_lock
);
1127 static void expire_client(struct nfs4_client
*clp
)
1129 nfsd4_client_record_remove(clp
);
1130 destroy_client(clp
);
1133 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1135 memcpy(target
->cl_verifier
.data
, source
->data
,
1136 sizeof(target
->cl_verifier
.data
));
1139 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1141 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1142 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1145 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1147 if (source
->cr_principal
) {
1148 target
->cr_principal
=
1149 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1150 if (target
->cr_principal
== NULL
)
1153 target
->cr_principal
= NULL
;
1154 target
->cr_flavor
= source
->cr_flavor
;
1155 target
->cr_uid
= source
->cr_uid
;
1156 target
->cr_gid
= source
->cr_gid
;
1157 target
->cr_group_info
= source
->cr_group_info
;
1158 get_group_info(target
->cr_group_info
);
1163 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1167 res
= o1
->len
- o2
->len
;
1170 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1173 static int same_name(const char *n1
, const char *n2
)
1175 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1179 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1181 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1185 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1187 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1190 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1194 if (g1
->ngroups
!= g2
->ngroups
)
1196 for (i
=0; i
<g1
->ngroups
; i
++)
1197 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1203 * RFC 3530 language requires clid_inuse be returned when the
1204 * "principal" associated with a requests differs from that previously
1205 * used. We use uid, gid's, and gss principal string as our best
1206 * approximation. We also don't want to allow non-gss use of a client
1207 * established using gss: in theory cr_principal should catch that
1208 * change, but in practice cr_principal can be null even in the gss case
1209 * since gssd doesn't always pass down a principal string.
1211 static bool is_gss_cred(struct svc_cred
*cr
)
1213 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1214 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1219 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1221 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1222 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1223 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1224 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1226 if (cr1
->cr_principal
== cr2
->cr_principal
)
1228 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1230 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1233 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1235 static u32 current_clientid
= 1;
1237 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1238 clp
->cl_clientid
.cl_id
= current_clientid
++;
1241 static void gen_confirm(struct nfs4_client
*clp
)
1246 verf
[0] = (__be32
)get_seconds();
1247 verf
[1] = (__be32
)i
++;
1248 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1251 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1253 struct nfs4_stid
*ret
;
1255 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1256 if (!ret
|| !ret
->sc_type
)
1261 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1263 struct nfs4_stid
*s
;
1265 s
= find_stateid(cl
, t
);
1268 if (typemask
& s
->sc_type
)
1273 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1274 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1276 struct nfs4_client
*clp
;
1277 struct sockaddr
*sa
= svc_addr(rqstp
);
1279 struct net
*net
= SVC_NET(rqstp
);
1280 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1282 clp
= alloc_client(name
);
1286 INIT_LIST_HEAD(&clp
->cl_sessions
);
1287 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1289 spin_lock(&nn
->client_lock
);
1291 spin_unlock(&nn
->client_lock
);
1294 idr_init(&clp
->cl_stateids
);
1295 atomic_set(&clp
->cl_refcount
, 0);
1296 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1297 INIT_LIST_HEAD(&clp
->cl_idhash
);
1298 INIT_LIST_HEAD(&clp
->cl_openowners
);
1299 INIT_LIST_HEAD(&clp
->cl_delegations
);
1300 INIT_LIST_HEAD(&clp
->cl_lru
);
1301 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1302 spin_lock_init(&clp
->cl_lock
);
1303 nfsd4_init_callback(&clp
->cl_cb_null
);
1304 clp
->cl_time
= get_seconds();
1305 clear_bit(0, &clp
->cl_cb_slot_busy
);
1306 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1307 copy_verf(clp
, verf
);
1308 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1310 clp
->cl_cb_session
= NULL
;
1316 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1318 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1319 struct nfs4_client
*clp
;
1322 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1325 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1326 new = &((*new)->rb_left
);
1328 new = &((*new)->rb_right
);
1331 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1332 rb_insert_color(&new_clp
->cl_namenode
, root
);
1335 static struct nfs4_client
*
1336 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1339 struct rb_node
*node
= root
->rb_node
;
1340 struct nfs4_client
*clp
;
1343 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1344 cmp
= compare_blob(&clp
->cl_name
, name
);
1346 node
= node
->rb_left
;
1348 node
= node
->rb_right
;
1356 add_to_unconfirmed(struct nfs4_client
*clp
)
1358 unsigned int idhashval
;
1359 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1361 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1362 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1363 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1364 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1369 move_to_confirmed(struct nfs4_client
*clp
)
1371 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1372 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1374 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1375 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1376 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1377 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1378 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1382 static struct nfs4_client
*
1383 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1385 struct nfs4_client
*clp
;
1386 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1388 list_for_each_entry(clp
, &nn
->conf_id_hashtbl
[idhashval
], cl_idhash
) {
1389 if (same_clid(&clp
->cl_clientid
, clid
)) {
1390 if ((bool)clp
->cl_minorversion
!= sessions
)
1399 static struct nfs4_client
*
1400 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1402 struct nfs4_client
*clp
;
1403 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1405 list_for_each_entry(clp
, &nn
->unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1406 if (same_clid(&clp
->cl_clientid
, clid
)) {
1407 if ((bool)clp
->cl_minorversion
!= sessions
)
1415 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1417 return clp
->cl_exchange_flags
!= 0;
1420 static struct nfs4_client
*
1421 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1423 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1426 static struct nfs4_client
*
1427 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1429 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1433 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1435 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1436 struct sockaddr
*sa
= svc_addr(rqstp
);
1437 u32 scopeid
= rpc_get_scope_id(sa
);
1438 unsigned short expected_family
;
1440 /* Currently, we only support tcp and tcp6 for the callback channel */
1441 if (se
->se_callback_netid_len
== 3 &&
1442 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1443 expected_family
= AF_INET
;
1444 else if (se
->se_callback_netid_len
== 4 &&
1445 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1446 expected_family
= AF_INET6
;
1450 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1451 se
->se_callback_addr_len
,
1452 (struct sockaddr
*)&conn
->cb_addr
,
1453 sizeof(conn
->cb_addr
));
1455 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1458 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1459 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1461 conn
->cb_prog
= se
->se_callback_prog
;
1462 conn
->cb_ident
= se
->se_callback_ident
;
1463 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1466 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1467 conn
->cb_addrlen
= 0;
1468 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1469 "will not receive delegations\n",
1470 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1476 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1479 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1481 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1484 dprintk("--> %s slot %p\n", __func__
, slot
);
1486 slot
->sl_opcnt
= resp
->opcnt
;
1487 slot
->sl_status
= resp
->cstate
.status
;
1489 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1490 if (nfsd4_not_cached(resp
)) {
1491 slot
->sl_datalen
= 0;
1494 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1495 base
= (char *)resp
->cstate
.datap
-
1496 (char *)resp
->xbuf
->head
[0].iov_base
;
1497 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1499 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1504 * Encode the replay sequence operation from the slot values.
1505 * If cachethis is FALSE encode the uncached rep error on the next
1506 * operation which sets resp->p and increments resp->opcnt for
1507 * nfs4svc_encode_compoundres.
1511 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1512 struct nfsd4_compoundres
*resp
)
1514 struct nfsd4_op
*op
;
1515 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1517 /* Encode the replayed sequence operation */
1518 op
= &args
->ops
[resp
->opcnt
- 1];
1519 nfsd4_encode_operation(resp
, op
);
1521 /* Return nfserr_retry_uncached_rep in next operation. */
1522 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1523 op
= &args
->ops
[resp
->opcnt
++];
1524 op
->status
= nfserr_retry_uncached_rep
;
1525 nfsd4_encode_operation(resp
, op
);
1531 * The sequence operation is not cached because we can use the slot and
1535 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1536 struct nfsd4_sequence
*seq
)
1538 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1541 dprintk("--> %s slot %p\n", __func__
, slot
);
1543 /* Either returns 0 or nfserr_retry_uncached */
1544 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1545 if (status
== nfserr_retry_uncached_rep
)
1548 /* The sequence operation has been encoded, cstate->datap set. */
1549 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1551 resp
->opcnt
= slot
->sl_opcnt
;
1552 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1553 status
= slot
->sl_status
;
1559 * Set the exchange_id flags returned by the server.
1562 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1564 /* pNFS is not supported */
1565 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1567 /* Referrals are supported, Migration is not. */
1568 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1570 /* set the wire flags to return to client. */
1571 clid
->flags
= new->cl_exchange_flags
;
1574 static bool client_has_state(struct nfs4_client
*clp
)
1577 * Note clp->cl_openowners check isn't quite right: there's no
1578 * need to count owners without stateid's.
1580 * Also note we should probably be using this in 4.0 case too.
1582 return !list_empty(&clp
->cl_openowners
)
1583 || !list_empty(&clp
->cl_delegations
)
1584 || !list_empty(&clp
->cl_sessions
);
1588 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1589 struct nfsd4_compound_state
*cstate
,
1590 struct nfsd4_exchange_id
*exid
)
1592 struct nfs4_client
*unconf
, *conf
, *new;
1594 char addr_str
[INET6_ADDRSTRLEN
];
1595 nfs4_verifier verf
= exid
->verifier
;
1596 struct sockaddr
*sa
= svc_addr(rqstp
);
1597 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1598 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1600 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1601 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1602 "ip_addr=%s flags %x, spa_how %d\n",
1603 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1604 addr_str
, exid
->flags
, exid
->spa_how
);
1606 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1607 return nfserr_inval
;
1609 /* Currently only support SP4_NONE */
1610 switch (exid
->spa_how
) {
1613 default: /* checked by xdr code */
1617 return nfserr_serverfault
; /* no excuse :-/ */
1620 /* Cases below refer to rfc 5661 section 18.35.4: */
1622 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1624 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1625 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1628 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1629 status
= nfserr_inval
;
1632 if (!creds_match
) { /* case 9 */
1633 status
= nfserr_perm
;
1636 if (!verfs_match
) { /* case 8 */
1637 status
= nfserr_not_same
;
1641 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1645 if (!creds_match
) { /* case 3 */
1646 if (client_has_state(conf
)) {
1647 status
= nfserr_clid_inuse
;
1650 expire_client(conf
);
1653 if (verfs_match
) { /* case 2 */
1654 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1658 /* case 5, client reboot */
1662 if (update
) { /* case 7 */
1663 status
= nfserr_noent
;
1667 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1668 if (unconf
) /* case 4, possible retry or client restart */
1669 expire_client(unconf
);
1671 /* case 1 (normal case) */
1673 new = create_client(exid
->clname
, rqstp
, &verf
);
1675 status
= nfserr_jukebox
;
1678 new->cl_minorversion
= 1;
1681 add_to_unconfirmed(new);
1683 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1684 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1686 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1687 nfsd4_set_ex_flags(new, exid
);
1689 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1690 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1694 nfs4_unlock_state();
1699 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1701 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1704 /* The slot is in use, and no response has been sent. */
1706 if (seqid
== slot_seqid
)
1707 return nfserr_jukebox
;
1709 return nfserr_seq_misordered
;
1711 /* Note unsigned 32-bit arithmetic handles wraparound: */
1712 if (likely(seqid
== slot_seqid
+ 1))
1714 if (seqid
== slot_seqid
)
1715 return nfserr_replay_cache
;
1716 return nfserr_seq_misordered
;
1720 * Cache the create session result into the create session single DRC
1721 * slot cache by saving the xdr structure. sl_seqid has been set.
1722 * Do this for solo or embedded create session operations.
1725 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1726 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1728 slot
->sl_status
= nfserr
;
1729 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1733 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1734 struct nfsd4_clid_slot
*slot
)
1736 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1737 return slot
->sl_status
;
1740 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1741 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1742 1 + /* MIN tag is length with zero, only length */ \
1743 3 + /* version, opcount, opcode */ \
1744 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1745 /* seqid, slotID, slotID, cache */ \
1746 4 ) * sizeof(__be32))
1748 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1749 2 + /* verifier: AUTH_NULL, length 0 */\
1751 1 + /* MIN tag is length with zero, only length */ \
1752 3 + /* opcount, opcode, opstatus*/ \
1753 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1754 /* seqid, slotID, slotID, slotID, status */ \
1755 5 ) * sizeof(__be32))
1757 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1759 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1760 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1764 nfsd4_create_session(struct svc_rqst
*rqstp
,
1765 struct nfsd4_compound_state
*cstate
,
1766 struct nfsd4_create_session
*cr_ses
)
1768 struct sockaddr
*sa
= svc_addr(rqstp
);
1769 struct nfs4_client
*conf
, *unconf
;
1770 struct nfsd4_session
*new;
1771 struct nfsd4_conn
*conn
;
1772 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1774 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1776 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1777 return nfserr_inval
;
1778 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1779 return nfserr_toosmall
;
1780 new = alloc_session(&cr_ses
->fore_channel
, nn
);
1782 return nfserr_jukebox
;
1783 status
= nfserr_jukebox
;
1784 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1786 goto out_free_session
;
1789 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1790 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1791 WARN_ON_ONCE(conf
&& unconf
);
1794 cs_slot
= &conf
->cl_cs_slot
;
1795 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1796 if (status
== nfserr_replay_cache
) {
1797 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1799 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1800 status
= nfserr_seq_misordered
;
1803 } else if (unconf
) {
1804 struct nfs4_client
*old
;
1805 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1806 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1807 status
= nfserr_clid_inuse
;
1810 cs_slot
= &unconf
->cl_cs_slot
;
1811 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1813 /* an unconfirmed replay returns misordered */
1814 status
= nfserr_seq_misordered
;
1817 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1820 move_to_confirmed(unconf
);
1823 status
= nfserr_stale_clientid
;
1828 * We do not support RDMA or persistent sessions
1830 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1831 cr_ses
->flags
&= ~SESSION4_RDMA
;
1833 init_session(rqstp
, new, conf
, cr_ses
);
1834 nfsd4_init_conn(rqstp
, conn
, new);
1836 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1837 NFS4_MAX_SESSIONID_LEN
);
1838 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1839 sizeof(struct nfsd4_channel_attrs
));
1840 cs_slot
->sl_seqid
++;
1841 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1843 /* cache solo and embedded create sessions under the state lock */
1844 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1845 nfs4_unlock_state();
1848 nfs4_unlock_state();
1851 __free_session(new);
1855 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1858 case NFS4_CDFC4_FORE
:
1859 case NFS4_CDFC4_BACK
:
1861 case NFS4_CDFC4_FORE_OR_BOTH
:
1862 case NFS4_CDFC4_BACK_OR_BOTH
:
1863 *dir
= NFS4_CDFC4_BOTH
;
1866 return nfserr_inval
;
1869 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1871 struct nfsd4_session
*session
= cstate
->session
;
1872 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1874 spin_lock(&nn
->client_lock
);
1875 session
->se_cb_prog
= bc
->bc_cb_program
;
1876 session
->se_cb_sec
= bc
->bc_cb_sec
;
1877 spin_unlock(&nn
->client_lock
);
1879 nfsd4_probe_callback(session
->se_client
);
1884 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1885 struct nfsd4_compound_state
*cstate
,
1886 struct nfsd4_bind_conn_to_session
*bcts
)
1889 struct nfsd4_conn
*conn
;
1890 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1892 if (!nfsd4_last_compound_op(rqstp
))
1893 return nfserr_not_only_op
;
1894 spin_lock(&nn
->client_lock
);
1895 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1896 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1897 * client_lock iself: */
1898 if (cstate
->session
) {
1899 nfsd4_get_session(cstate
->session
);
1900 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1902 spin_unlock(&nn
->client_lock
);
1903 if (!cstate
->session
)
1904 return nfserr_badsession
;
1906 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1909 conn
= alloc_conn(rqstp
, bcts
->dir
);
1911 return nfserr_jukebox
;
1912 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1916 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1920 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1924 nfsd4_destroy_session(struct svc_rqst
*r
,
1925 struct nfsd4_compound_state
*cstate
,
1926 struct nfsd4_destroy_session
*sessionid
)
1928 struct nfsd4_session
*ses
;
1929 __be32 status
= nfserr_badsession
;
1930 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
1933 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1934 * - Should we return nfserr_back_chan_busy if waiting for
1935 * callbacks on to-be-destroyed session?
1936 * - Do we need to clear any callback info from previous session?
1939 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1940 if (!nfsd4_last_compound_op(r
))
1941 return nfserr_not_only_op
;
1943 dump_sessionid(__func__
, &sessionid
->sessionid
);
1944 spin_lock(&nn
->client_lock
);
1945 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
1947 spin_unlock(&nn
->client_lock
);
1951 unhash_session(ses
);
1952 spin_unlock(&nn
->client_lock
);
1955 nfsd4_probe_callback_sync(ses
->se_client
);
1956 nfs4_unlock_state();
1958 spin_lock(&nn
->client_lock
);
1959 nfsd4_del_conns(ses
);
1960 nfsd4_put_session_locked(ses
);
1961 spin_unlock(&nn
->client_lock
);
1967 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1969 struct nfsd4_conn
*c
;
1971 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1972 if (c
->cn_xprt
== xpt
) {
1979 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1981 struct nfs4_client
*clp
= ses
->se_client
;
1982 struct nfsd4_conn
*c
;
1985 spin_lock(&clp
->cl_lock
);
1986 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1988 spin_unlock(&clp
->cl_lock
);
1992 __nfsd4_hash_conn(new, ses
);
1993 spin_unlock(&clp
->cl_lock
);
1994 ret
= nfsd4_register_conn(new);
1996 /* oops; xprt is already down: */
1997 nfsd4_conn_lost(&new->cn_xpt_user
);
2001 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2003 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2005 return args
->opcnt
> session
->se_fchannel
.maxops
;
2008 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2009 struct nfsd4_session
*session
)
2011 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2013 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2017 nfsd4_sequence(struct svc_rqst
*rqstp
,
2018 struct nfsd4_compound_state
*cstate
,
2019 struct nfsd4_sequence
*seq
)
2021 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2022 struct nfsd4_session
*session
;
2023 struct nfsd4_slot
*slot
;
2024 struct nfsd4_conn
*conn
;
2026 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2028 if (resp
->opcnt
!= 1)
2029 return nfserr_sequence_pos
;
2032 * Will be either used or freed by nfsd4_sequence_check_conn
2035 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2037 return nfserr_jukebox
;
2039 spin_lock(&nn
->client_lock
);
2040 status
= nfserr_badsession
;
2041 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2045 status
= nfserr_too_many_ops
;
2046 if (nfsd4_session_too_many_ops(rqstp
, session
))
2049 status
= nfserr_req_too_big
;
2050 if (nfsd4_request_too_big(rqstp
, session
))
2053 status
= nfserr_badslot
;
2054 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2057 slot
= session
->se_slots
[seq
->slotid
];
2058 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2060 /* We do not negotiate the number of slots yet, so set the
2061 * maxslots to the session maxreqs which is used to encode
2062 * sr_highest_slotid and the sr_target_slot id to maxslots */
2063 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2065 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2066 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2067 if (status
== nfserr_replay_cache
) {
2068 status
= nfserr_seq_misordered
;
2069 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2071 cstate
->slot
= slot
;
2072 cstate
->session
= session
;
2073 /* Return the cached reply status and set cstate->status
2074 * for nfsd4_proc_compound processing */
2075 status
= nfsd4_replay_cache_entry(resp
, seq
);
2076 cstate
->status
= nfserr_replay_cache
;
2082 nfsd4_sequence_check_conn(conn
, session
);
2085 /* Success! bump slot seqid */
2086 slot
->sl_seqid
= seq
->seqid
;
2087 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2089 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2091 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2093 cstate
->slot
= slot
;
2094 cstate
->session
= session
;
2097 /* Hold a session reference until done processing the compound. */
2098 if (cstate
->session
) {
2099 struct nfs4_client
*clp
= session
->se_client
;
2101 nfsd4_get_session(cstate
->session
);
2102 atomic_inc(&clp
->cl_refcount
);
2103 switch (clp
->cl_cb_state
) {
2105 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2107 case NFSD4_CB_FAULT
:
2108 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2111 seq
->status_flags
= 0;
2115 spin_unlock(&nn
->client_lock
);
2120 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2122 struct nfs4_client
*conf
, *unconf
, *clp
;
2124 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2127 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2128 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2129 WARN_ON_ONCE(conf
&& unconf
);
2134 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2135 status
= nfserr_clientid_busy
;
2139 /* rfc5661 18.50.3 */
2140 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2141 status
= nfserr_clientid_busy
;
2147 status
= nfserr_stale_clientid
;
2153 nfs4_unlock_state();
2158 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2162 if (rc
->rca_one_fs
) {
2163 if (!cstate
->current_fh
.fh_dentry
)
2164 return nfserr_nofilehandle
;
2166 * We don't take advantage of the rca_one_fs case.
2167 * That's OK, it's optional, we can safely ignore it.
2173 status
= nfserr_complete_already
;
2174 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2175 &cstate
->session
->se_client
->cl_flags
))
2178 status
= nfserr_stale_clientid
;
2179 if (is_client_expired(cstate
->session
->se_client
))
2181 * The following error isn't really legal.
2182 * But we only get here if the client just explicitly
2183 * destroyed the client. Surely it no longer cares what
2184 * error it gets back on an operation for the dead
2190 nfsd4_client_record_create(cstate
->session
->se_client
);
2192 nfs4_unlock_state();
2197 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2198 struct nfsd4_setclientid
*setclid
)
2200 struct xdr_netobj clname
= setclid
->se_name
;
2201 nfs4_verifier clverifier
= setclid
->se_verf
;
2202 struct nfs4_client
*conf
, *unconf
, *new;
2204 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2206 /* Cases below refer to rfc 3530 section 14.2.33: */
2208 conf
= find_confirmed_client_by_name(&clname
, nn
);
2211 status
= nfserr_clid_inuse
;
2212 if (clp_used_exchangeid(conf
))
2214 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2215 char addr_str
[INET6_ADDRSTRLEN
];
2216 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2218 dprintk("NFSD: setclientid: string in use by client "
2219 "at %s\n", addr_str
);
2223 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2225 expire_client(unconf
);
2226 status
= nfserr_jukebox
;
2227 new = create_client(clname
, rqstp
, &clverifier
);
2230 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2231 /* case 1: probable callback update */
2232 copy_clid(new, conf
);
2233 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2235 new->cl_minorversion
= 0;
2236 gen_callback(new, setclid
, rqstp
);
2237 add_to_unconfirmed(new);
2238 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2239 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2240 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2243 nfs4_unlock_state();
2249 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2250 struct nfsd4_compound_state
*cstate
,
2251 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2253 struct nfs4_client
*conf
, *unconf
;
2254 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2255 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2257 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2259 if (STALE_CLIENTID(clid
, nn
))
2260 return nfserr_stale_clientid
;
2263 conf
= find_confirmed_client(clid
, false, nn
);
2264 unconf
= find_unconfirmed_client(clid
, false, nn
);
2266 * We try hard to give out unique clientid's, so if we get an
2267 * attempt to confirm the same clientid with a different cred,
2268 * there's a bug somewhere. Let's charitably assume it's our
2271 status
= nfserr_serverfault
;
2272 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2274 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2276 /* cases below refer to rfc 3530 section 14.2.34: */
2277 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2278 if (conf
&& !unconf
) /* case 2: probable retransmit */
2280 else /* case 4: client hasn't noticed we rebooted yet? */
2281 status
= nfserr_stale_clientid
;
2285 if (conf
) { /* case 1: callback update */
2286 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2287 nfsd4_probe_callback(conf
);
2288 expire_client(unconf
);
2289 } else { /* case 3: normal case; new or rebooted client */
2290 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2292 expire_client(conf
);
2293 move_to_confirmed(unconf
);
2294 nfsd4_probe_callback(unconf
);
2297 nfs4_unlock_state();
2301 static struct nfs4_file
*nfsd4_alloc_file(void)
2303 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2306 /* OPEN Share state helper functions */
2307 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2309 unsigned int hashval
= file_hashval(ino
);
2311 atomic_set(&fp
->fi_ref
, 1);
2312 INIT_LIST_HEAD(&fp
->fi_hash
);
2313 INIT_LIST_HEAD(&fp
->fi_stateids
);
2314 INIT_LIST_HEAD(&fp
->fi_delegations
);
2315 fp
->fi_inode
= igrab(ino
);
2316 fp
->fi_had_conflict
= false;
2317 fp
->fi_lease
= NULL
;
2318 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2319 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2320 spin_lock(&recall_lock
);
2321 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2322 spin_unlock(&recall_lock
);
2326 nfsd4_free_slab(struct kmem_cache
**slab
)
2330 kmem_cache_destroy(*slab
);
2335 nfsd4_free_slabs(void)
2337 nfsd4_free_slab(&openowner_slab
);
2338 nfsd4_free_slab(&lockowner_slab
);
2339 nfsd4_free_slab(&file_slab
);
2340 nfsd4_free_slab(&stateid_slab
);
2341 nfsd4_free_slab(&deleg_slab
);
2345 nfsd4_init_slabs(void)
2347 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2348 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2349 if (openowner_slab
== NULL
)
2351 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2352 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2353 if (lockowner_slab
== NULL
)
2355 file_slab
= kmem_cache_create("nfsd4_files",
2356 sizeof(struct nfs4_file
), 0, 0, NULL
);
2357 if (file_slab
== NULL
)
2359 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2360 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2361 if (stateid_slab
== NULL
)
2363 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2364 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2365 if (deleg_slab
== NULL
)
2370 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2374 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2376 kfree(oo
->oo_owner
.so_owner
.data
);
2377 kmem_cache_free(openowner_slab
, oo
);
2380 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2382 kfree(lo
->lo_owner
.so_owner
.data
);
2383 kmem_cache_free(lockowner_slab
, lo
);
2386 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2388 rp
->rp_status
= nfserr_serverfault
;
2390 rp
->rp_buf
= rp
->rp_ibuf
;
2393 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2395 struct nfs4_stateowner
*sop
;
2397 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2401 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2402 if (!sop
->so_owner
.data
) {
2403 kmem_cache_free(slab
, sop
);
2406 sop
->so_owner
.len
= owner
->len
;
2408 INIT_LIST_HEAD(&sop
->so_stateids
);
2409 sop
->so_client
= clp
;
2410 init_nfs4_replay(&sop
->so_replay
);
2414 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2416 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2418 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2419 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2422 static struct nfs4_openowner
*
2423 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2424 struct nfs4_openowner
*oo
;
2426 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2429 oo
->oo_owner
.so_is_open_owner
= 1;
2430 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2431 oo
->oo_flags
= NFS4_OO_NEW
;
2433 oo
->oo_last_closed_stid
= NULL
;
2434 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2435 hash_openowner(oo
, clp
, strhashval
);
2439 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2440 struct nfs4_openowner
*oo
= open
->op_openowner
;
2442 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2443 INIT_LIST_HEAD(&stp
->st_lockowners
);
2444 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2445 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2446 stp
->st_stateowner
= &oo
->oo_owner
;
2449 stp
->st_access_bmap
= 0;
2450 stp
->st_deny_bmap
= 0;
2451 set_access(open
->op_share_access
, stp
);
2452 set_deny(open
->op_share_deny
, stp
);
2453 stp
->st_openstp
= NULL
;
2457 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2459 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2461 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2463 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2464 oo
->oo_time
= get_seconds();
2468 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2471 return (sop
->so_owner
.len
== owner
->len
) &&
2472 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2473 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2476 static struct nfs4_openowner
*
2477 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2478 bool sessions
, struct nfsd_net
*nn
)
2480 struct nfs4_stateowner
*so
;
2481 struct nfs4_openowner
*oo
;
2482 struct nfs4_client
*clp
;
2484 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2485 if (!so
->so_is_open_owner
)
2487 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2489 clp
= oo
->oo_owner
.so_client
;
2490 if ((bool)clp
->cl_minorversion
!= sessions
)
2492 renew_client(oo
->oo_owner
.so_client
);
2499 /* search file_hashtbl[] for file */
2500 static struct nfs4_file
*
2501 find_file(struct inode
*ino
)
2503 unsigned int hashval
= file_hashval(ino
);
2504 struct nfs4_file
*fp
;
2506 spin_lock(&recall_lock
);
2507 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2508 if (fp
->fi_inode
== ino
) {
2510 spin_unlock(&recall_lock
);
2514 spin_unlock(&recall_lock
);
2519 * Called to check deny when READ with all zero stateid or
2520 * WRITE with all zero or all one stateid
2523 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2525 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2526 struct nfs4_file
*fp
;
2527 struct nfs4_ol_stateid
*stp
;
2530 fp
= find_file(ino
);
2533 ret
= nfserr_locked
;
2534 /* Search for conflicting share reservations */
2535 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2536 if (test_deny(deny_type
, stp
) ||
2537 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2546 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2548 /* We're assuming the state code never drops its reference
2549 * without first removing the lease. Since we're in this lease
2550 * callback (and since the lease code is serialized by the kernel
2551 * lock) we know the server hasn't removed the lease yet, we know
2552 * it's safe to take a reference: */
2553 atomic_inc(&dp
->dl_count
);
2555 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2557 /* only place dl_time is set. protected by lock_flocks*/
2558 dp
->dl_time
= get_seconds();
2560 nfsd4_cb_recall(dp
);
2563 /* Called from break_lease() with lock_flocks() held. */
2564 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2566 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2567 struct nfs4_delegation
*dp
;
2570 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2573 if (fp
->fi_had_conflict
) {
2574 WARN(1, "duplicate break on %p\n", fp
);
2578 * We don't want the locks code to timeout the lease for us;
2579 * we'll remove it ourself if a delegation isn't returned
2582 fl
->fl_break_time
= 0;
2584 spin_lock(&recall_lock
);
2585 fp
->fi_had_conflict
= true;
2586 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2587 nfsd_break_one_deleg(dp
);
2588 spin_unlock(&recall_lock
);
2592 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2595 return lease_modify(onlist
, arg
);
2600 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2601 .lm_break
= nfsd_break_deleg_cb
,
2602 .lm_change
= nfsd_change_deleg_cb
,
2605 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2607 if (nfsd4_has_session(cstate
))
2609 if (seqid
== so
->so_seqid
- 1)
2610 return nfserr_replay_me
;
2611 if (seqid
== so
->so_seqid
)
2613 return nfserr_bad_seqid
;
2617 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2618 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2620 clientid_t
*clientid
= &open
->op_clientid
;
2621 struct nfs4_client
*clp
= NULL
;
2622 unsigned int strhashval
;
2623 struct nfs4_openowner
*oo
= NULL
;
2626 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2627 return nfserr_stale_clientid
;
2629 * In case we need it later, after we've already created the
2630 * file and don't want to risk a further failure:
2632 open
->op_file
= nfsd4_alloc_file();
2633 if (open
->op_file
== NULL
)
2634 return nfserr_jukebox
;
2636 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2637 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2638 open
->op_openowner
= oo
;
2640 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2643 return nfserr_expired
;
2646 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2647 /* Replace unconfirmed owners without checking for replay. */
2648 clp
= oo
->oo_owner
.so_client
;
2649 release_openowner(oo
);
2650 open
->op_openowner
= NULL
;
2653 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2656 clp
= oo
->oo_owner
.so_client
;
2659 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2661 return nfserr_jukebox
;
2662 open
->op_openowner
= oo
;
2664 open
->op_stp
= nfs4_alloc_stateid(clp
);
2666 return nfserr_jukebox
;
2670 static inline __be32
2671 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2673 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2674 return nfserr_openmode
;
2679 static int share_access_to_flags(u32 share_access
)
2681 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2684 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2686 struct nfs4_stid
*ret
;
2688 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2691 return delegstateid(ret
);
2694 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2696 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2697 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2701 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2702 struct nfs4_delegation
**dp
)
2705 __be32 status
= nfserr_bad_stateid
;
2707 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2710 flags
= share_access_to_flags(open
->op_share_access
);
2711 status
= nfs4_check_delegmode(*dp
, flags
);
2715 if (!nfsd4_is_deleg_cur(open
))
2719 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2724 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2726 struct nfs4_ol_stateid
*local
;
2727 struct nfs4_openowner
*oo
= open
->op_openowner
;
2729 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2730 /* ignore lock owners */
2731 if (local
->st_stateowner
->so_is_open_owner
== 0)
2733 /* remember if we have seen this open owner */
2734 if (local
->st_stateowner
== &oo
->oo_owner
)
2736 /* check for conflicting share reservations */
2737 if (!test_share(local
, open
))
2738 return nfserr_share_denied
;
2743 static inline int nfs4_access_to_access(u32 nfs4_access
)
2747 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2748 flags
|= NFSD_MAY_READ
;
2749 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2750 flags
|= NFSD_MAY_WRITE
;
2754 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2755 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2758 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2759 int access
= nfs4_access_to_access(open
->op_share_access
);
2761 if (!fp
->fi_fds
[oflag
]) {
2762 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2763 &fp
->fi_fds
[oflag
]);
2767 nfs4_file_get_access(fp
, oflag
);
2772 static inline __be32
2773 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2774 struct nfsd4_open
*open
)
2776 struct iattr iattr
= {
2777 .ia_valid
= ATTR_SIZE
,
2780 if (!open
->op_truncate
)
2782 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2783 return nfserr_inval
;
2784 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2788 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
)
2790 u32 op_share_access
= open
->op_share_access
;
2794 new_access
= !test_access(op_share_access
, stp
);
2796 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2800 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2803 int oflag
= nfs4_access_to_omode(op_share_access
);
2804 nfs4_file_put_access(fp
, oflag
);
2808 /* remember the open */
2809 set_access(op_share_access
, stp
);
2810 set_deny(open
->op_share_deny
, stp
);
2817 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2819 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2822 /* Should we give out recallable state?: */
2823 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2825 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2828 * In the sessions case, since we don't have to establish a
2829 * separate connection for callbacks, we assume it's OK
2830 * until we hear otherwise:
2832 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2835 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2837 struct file_lock
*fl
;
2839 fl
= locks_alloc_lock();
2842 locks_init_lock(fl
);
2843 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2844 fl
->fl_flags
= FL_LEASE
;
2845 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2846 fl
->fl_end
= OFFSET_MAX
;
2847 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2848 fl
->fl_pid
= current
->tgid
;
2852 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2854 struct nfs4_file
*fp
= dp
->dl_file
;
2855 struct file_lock
*fl
;
2858 fl
= nfs4_alloc_init_lease(dp
, flag
);
2861 fl
->fl_file
= find_readable_file(fp
);
2862 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2863 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2865 list_del_init(&dp
->dl_perclnt
);
2866 locks_free_lock(fl
);
2870 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2871 atomic_set(&fp
->fi_delegees
, 1);
2872 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2876 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2878 struct nfs4_file
*fp
= dp
->dl_file
;
2881 return nfs4_setlease(dp
, flag
);
2882 spin_lock(&recall_lock
);
2883 if (fp
->fi_had_conflict
) {
2884 spin_unlock(&recall_lock
);
2887 atomic_inc(&fp
->fi_delegees
);
2888 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2889 spin_unlock(&recall_lock
);
2890 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2894 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2896 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2897 if (status
== -EAGAIN
)
2898 open
->op_why_no_deleg
= WND4_CONTENTION
;
2900 open
->op_why_no_deleg
= WND4_RESOURCE
;
2901 switch (open
->op_deleg_want
) {
2902 case NFS4_SHARE_WANT_READ_DELEG
:
2903 case NFS4_SHARE_WANT_WRITE_DELEG
:
2904 case NFS4_SHARE_WANT_ANY_DELEG
:
2906 case NFS4_SHARE_WANT_CANCEL
:
2907 open
->op_why_no_deleg
= WND4_CANCELLED
;
2909 case NFS4_SHARE_WANT_NO_DELEG
:
2916 * Attempt to hand out a delegation.
2919 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2920 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2922 struct nfs4_delegation
*dp
;
2923 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2925 int status
= 0, flag
= 0;
2927 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2928 flag
= NFS4_OPEN_DELEGATE_NONE
;
2929 open
->op_recall
= 0;
2930 switch (open
->op_claim_type
) {
2931 case NFS4_OPEN_CLAIM_PREVIOUS
:
2933 open
->op_recall
= 1;
2934 flag
= open
->op_delegate_type
;
2935 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2938 case NFS4_OPEN_CLAIM_NULL
:
2939 /* Let's not give out any delegations till everyone's
2940 * had the chance to reclaim theirs.... */
2941 if (locks_in_grace(net
))
2943 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2945 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2946 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2948 flag
= NFS4_OPEN_DELEGATE_READ
;
2954 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2957 status
= nfs4_set_delegation(dp
, flag
);
2961 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2963 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2964 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2966 open
->op_delegate_type
= flag
;
2967 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2968 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2969 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2970 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2972 /* 4.1 client asking for a delegation? */
2973 if (open
->op_deleg_want
)
2974 nfsd4_open_deleg_none_ext(open
, status
);
2978 unhash_stid(&dp
->dl_stid
);
2979 nfs4_put_delegation(dp
);
2981 flag
= NFS4_OPEN_DELEGATE_NONE
;
2985 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2986 struct nfs4_delegation
*dp
)
2988 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
2989 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2990 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2991 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
2992 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
2993 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2994 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2995 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
2997 /* Otherwise the client must be confused wanting a delegation
2998 * it already has, therefore we don't return
2999 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3004 * called with nfs4_lock_state() held.
3007 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3009 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3010 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3011 struct nfs4_file
*fp
= NULL
;
3012 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3013 struct nfs4_ol_stateid
*stp
= NULL
;
3014 struct nfs4_delegation
*dp
= NULL
;
3018 * Lookup file; if found, lookup stateid and check open request,
3019 * and check for delegations in the process of being recalled.
3020 * If not found, create the nfs4_file struct
3022 fp
= find_file(ino
);
3024 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3026 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3030 status
= nfserr_bad_stateid
;
3031 if (nfsd4_is_deleg_cur(open
))
3033 status
= nfserr_jukebox
;
3035 open
->op_file
= NULL
;
3036 nfsd4_init_file(fp
, ino
);
3040 * OPEN the file, or upgrade an existing OPEN.
3041 * If truncate fails, the OPEN fails.
3044 /* Stateid was found, this is an OPEN upgrade */
3045 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3049 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3052 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3056 open
->op_stp
= NULL
;
3057 init_open_stateid(stp
, fp
, open
);
3059 update_stateid(&stp
->st_stid
.sc_stateid
);
3060 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3062 if (nfsd4_has_session(&resp
->cstate
)) {
3063 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3065 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3066 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3067 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3073 * Attempt to hand out a delegation. No error return, because the
3074 * OPEN succeeds even if we fail.
3076 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3080 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3081 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3083 /* 4.1 client trying to upgrade/downgrade delegation? */
3084 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3085 open
->op_deleg_want
)
3086 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3090 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3091 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3093 * To finish the open response, we just need to set the rflags.
3095 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3096 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3097 !nfsd4_has_session(&resp
->cstate
))
3098 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3103 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3105 if (open
->op_openowner
) {
3106 struct nfs4_openowner
*oo
= open
->op_openowner
;
3108 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3109 list_del_init(&oo
->oo_close_lru
);
3110 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3112 release_openowner(oo
);
3113 open
->op_openowner
= NULL
;
3115 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3119 nfsd4_free_file(open
->op_file
);
3121 free_generic_stateid(open
->op_stp
);
3124 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3126 struct nfs4_client
*found
;
3128 if (STALE_CLIENTID(clid
, nn
))
3129 return nfserr_stale_clientid
;
3130 found
= find_confirmed_client(clid
, session
, nn
);
3133 return found
? nfs_ok
: nfserr_expired
;
3137 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3140 struct nfs4_client
*clp
;
3142 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3145 dprintk("process_renew(%08x/%08x): starting\n",
3146 clid
->cl_boot
, clid
->cl_id
);
3147 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3150 status
= nfserr_cb_path_down
;
3151 if (!list_empty(&clp
->cl_delegations
)
3152 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3156 nfs4_unlock_state();
3161 nfsd4_end_grace(struct nfsd_net
*nn
)
3163 /* do nothing if grace period already ended */
3164 if (nn
->grace_ended
)
3167 dprintk("NFSD: end of grace period\n");
3168 nn
->grace_ended
= true;
3169 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3170 locks_end_grace(&nn
->nfsd4_manager
);
3172 * Now that every NFSv4 client has had the chance to recover and
3173 * to see the (possibly new, possibly shorter) lease time, we
3174 * can safely set the next grace time to the current lease time:
3176 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3180 nfs4_laundromat(struct nfsd_net
*nn
)
3182 struct nfs4_client
*clp
;
3183 struct nfs4_openowner
*oo
;
3184 struct nfs4_delegation
*dp
;
3185 struct list_head
*pos
, *next
, reaplist
;
3186 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3187 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3188 time_t u
, test_val
= nn
->nfsd4_lease
;
3192 dprintk("NFSD: laundromat service - starting\n");
3193 nfsd4_end_grace(nn
);
3194 INIT_LIST_HEAD(&reaplist
);
3195 spin_lock(&nn
->client_lock
);
3196 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3197 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3198 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3199 t
= clp
->cl_time
- cutoff
;
3200 if (clientid_val
> t
)
3204 if (atomic_read(&clp
->cl_refcount
)) {
3205 dprintk("NFSD: client in use (clientid %08x)\n",
3206 clp
->cl_clientid
.cl_id
);
3209 unhash_client_locked(clp
);
3210 list_add(&clp
->cl_lru
, &reaplist
);
3212 spin_unlock(&nn
->client_lock
);
3213 list_for_each_safe(pos
, next
, &reaplist
) {
3214 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3215 dprintk("NFSD: purging unused client (clientid %08x)\n",
3216 clp
->cl_clientid
.cl_id
);
3219 spin_lock(&recall_lock
);
3220 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3221 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3222 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3224 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3225 u
= dp
->dl_time
- cutoff
;
3230 list_move(&dp
->dl_recall_lru
, &reaplist
);
3232 spin_unlock(&recall_lock
);
3233 list_for_each_safe(pos
, next
, &reaplist
) {
3234 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3235 unhash_delegation(dp
);
3237 test_val
= nn
->nfsd4_lease
;
3238 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3239 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3240 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3241 u
= oo
->oo_time
- cutoff
;
3246 release_openowner(oo
);
3248 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3249 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3250 nfs4_unlock_state();
3251 return clientid_val
;
3254 static struct workqueue_struct
*laundry_wq
;
3255 static void laundromat_main(struct work_struct
*);
3258 laundromat_main(struct work_struct
*laundry
)
3261 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3263 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3266 t
= nfs4_laundromat(nn
);
3267 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3268 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3271 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3273 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3274 return nfserr_bad_stateid
;
3279 access_permit_read(struct nfs4_ol_stateid
*stp
)
3281 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3282 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3283 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3287 access_permit_write(struct nfs4_ol_stateid
*stp
)
3289 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3290 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3294 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3296 __be32 status
= nfserr_openmode
;
3298 /* For lock stateid's, we test the parent open, not the lock: */
3299 if (stp
->st_openstp
)
3300 stp
= stp
->st_openstp
;
3301 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3303 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3310 static inline __be32
3311 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3313 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3315 else if (locks_in_grace(net
)) {
3316 /* Answer in remaining cases depends on existence of
3317 * conflicting state; so we must wait out the grace period. */
3318 return nfserr_grace
;
3319 } else if (flags
& WR_STATE
)
3320 return nfs4_share_conflict(current_fh
,
3321 NFS4_SHARE_DENY_WRITE
);
3322 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3323 return nfs4_share_conflict(current_fh
,
3324 NFS4_SHARE_DENY_READ
);
3328 * Allow READ/WRITE during grace period on recovered state only for files
3329 * that are not able to provide mandatory locking.
3332 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3334 return locks_in_grace(net
) && mandatory_lock(inode
);
3337 /* Returns true iff a is later than b: */
3338 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3340 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3343 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3346 * When sessions are used the stateid generation number is ignored
3349 if (has_session
&& in
->si_generation
== 0)
3352 if (in
->si_generation
== ref
->si_generation
)
3355 /* If the client sends us a stateid from the future, it's buggy: */
3356 if (stateid_generation_after(in
, ref
))
3357 return nfserr_bad_stateid
;
3359 * However, we could see a stateid from the past, even from a
3360 * non-buggy client. For example, if the client sends a lock
3361 * while some IO is outstanding, the lock may bump si_generation
3362 * while the IO is still in flight. The client could avoid that
3363 * situation by waiting for responses on all the IO requests,
3364 * but better performance may result in retrying IO that
3365 * receives an old_stateid error if requests are rarely
3366 * reordered in flight:
3368 return nfserr_old_stateid
;
3371 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3373 struct nfs4_stid
*s
;
3374 struct nfs4_ol_stateid
*ols
;
3377 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3378 return nfserr_bad_stateid
;
3379 /* Client debugging aid. */
3380 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3381 char addr_str
[INET6_ADDRSTRLEN
];
3382 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3384 pr_warn_ratelimited("NFSD: client %s testing state ID "
3385 "with incorrect client ID\n", addr_str
);
3386 return nfserr_bad_stateid
;
3388 s
= find_stateid(cl
, stateid
);
3390 return nfserr_bad_stateid
;
3391 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3394 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3396 ols
= openlockstateid(s
);
3397 if (ols
->st_stateowner
->so_is_open_owner
3398 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3399 return nfserr_bad_stateid
;
3403 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3404 struct nfs4_stid
**s
, bool sessions
,
3405 struct nfsd_net
*nn
)
3407 struct nfs4_client
*cl
;
3410 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3411 return nfserr_bad_stateid
;
3412 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3414 if (status
== nfserr_stale_clientid
)
3415 return nfserr_stale_stateid
;
3418 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3420 return nfserr_bad_stateid
;
3425 * Checks for stateid operations
3428 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3429 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3431 struct nfs4_stid
*s
;
3432 struct nfs4_ol_stateid
*stp
= NULL
;
3433 struct nfs4_delegation
*dp
= NULL
;
3434 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3435 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3436 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3442 if (grace_disallows_io(net
, ino
))
3443 return nfserr_grace
;
3445 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3446 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3448 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3449 &s
, cstate
->minorversion
, nn
);
3452 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3455 switch (s
->sc_type
) {
3456 case NFS4_DELEG_STID
:
3457 dp
= delegstateid(s
);
3458 status
= nfs4_check_delegmode(dp
, flags
);
3462 *filpp
= dp
->dl_file
->fi_deleg_file
;
3465 status
= nfserr_serverfault
;
3470 case NFS4_OPEN_STID
:
3471 case NFS4_LOCK_STID
:
3472 stp
= openlockstateid(s
);
3473 status
= nfs4_check_fh(current_fh
, stp
);
3476 if (stp
->st_stateowner
->so_is_open_owner
3477 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3479 status
= nfs4_check_openmode(stp
, flags
);
3483 if (flags
& RD_STATE
)
3484 *filpp
= find_readable_file(stp
->st_file
);
3486 *filpp
= find_writeable_file(stp
->st_file
);
3490 return nfserr_bad_stateid
;
3498 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3500 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3501 return nfserr_locks_held
;
3502 release_lock_stateid(stp
);
3507 * Test if the stateid is valid
3510 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3511 struct nfsd4_test_stateid
*test_stateid
)
3513 struct nfsd4_test_stateid_id
*stateid
;
3514 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3517 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3518 stateid
->ts_id_status
=
3519 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3520 nfs4_unlock_state();
3526 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3527 struct nfsd4_free_stateid
*free_stateid
)
3529 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3530 struct nfs4_stid
*s
;
3531 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3532 __be32 ret
= nfserr_bad_stateid
;
3535 s
= find_stateid(cl
, stateid
);
3538 switch (s
->sc_type
) {
3539 case NFS4_DELEG_STID
:
3540 ret
= nfserr_locks_held
;
3542 case NFS4_OPEN_STID
:
3543 case NFS4_LOCK_STID
:
3544 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3547 if (s
->sc_type
== NFS4_LOCK_STID
)
3548 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3550 ret
= nfserr_locks_held
;
3553 ret
= nfserr_bad_stateid
;
3556 nfs4_unlock_state();
3563 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3564 RD_STATE
: WR_STATE
;
3567 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3569 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3570 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3573 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3576 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3578 * "Closed" stateid's exist *only* to return
3579 * nfserr_replay_me from the previous step.
3581 return nfserr_bad_stateid
;
3582 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3585 return nfs4_check_fh(current_fh
, stp
);
3589 * Checks for sequence id mutating operations.
3592 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3593 stateid_t
*stateid
, char typemask
,
3594 struct nfs4_ol_stateid
**stpp
,
3595 struct nfsd_net
*nn
)
3598 struct nfs4_stid
*s
;
3600 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3601 seqid
, STATEID_VAL(stateid
));
3604 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3605 cstate
->minorversion
, nn
);
3608 *stpp
= openlockstateid(s
);
3609 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3611 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3614 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3615 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3618 struct nfs4_openowner
*oo
;
3620 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3621 NFS4_OPEN_STID
, stpp
, nn
);
3624 oo
= openowner((*stpp
)->st_stateowner
);
3625 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3626 return nfserr_bad_stateid
;
3631 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3632 struct nfsd4_open_confirm
*oc
)
3635 struct nfs4_openowner
*oo
;
3636 struct nfs4_ol_stateid
*stp
;
3637 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3639 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3640 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3641 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3643 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3649 status
= nfs4_preprocess_seqid_op(cstate
,
3650 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3651 NFS4_OPEN_STID
, &stp
, nn
);
3654 oo
= openowner(stp
->st_stateowner
);
3655 status
= nfserr_bad_stateid
;
3656 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3658 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3659 update_stateid(&stp
->st_stid
.sc_stateid
);
3660 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3661 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3662 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3664 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3667 if (!cstate
->replay_owner
)
3668 nfs4_unlock_state();
3672 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3674 if (!test_access(access
, stp
))
3676 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3677 clear_access(access
, stp
);
3680 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3682 switch (to_access
) {
3683 case NFS4_SHARE_ACCESS_READ
:
3684 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3685 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3687 case NFS4_SHARE_ACCESS_WRITE
:
3688 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3689 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3691 case NFS4_SHARE_ACCESS_BOTH
:
3699 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3702 for (i
= 0; i
< 4; i
++) {
3703 if ((i
& deny
) != i
)
3709 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3710 struct nfsd4_compound_state
*cstate
,
3711 struct nfsd4_open_downgrade
*od
)
3714 struct nfs4_ol_stateid
*stp
;
3715 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3717 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3718 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3719 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3721 /* We don't yet support WANT bits: */
3722 if (od
->od_deleg_want
)
3723 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3727 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3728 &od
->od_stateid
, &stp
, nn
);
3731 status
= nfserr_inval
;
3732 if (!test_access(od
->od_share_access
, stp
)) {
3733 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3734 stp
->st_access_bmap
, od
->od_share_access
);
3737 if (!test_deny(od
->od_share_deny
, stp
)) {
3738 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3739 stp
->st_deny_bmap
, od
->od_share_deny
);
3742 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3744 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3746 update_stateid(&stp
->st_stid
.sc_stateid
);
3747 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3750 if (!cstate
->replay_owner
)
3751 nfs4_unlock_state();
3755 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3757 struct nfs4_openowner
*oo
;
3758 struct nfs4_ol_stateid
*s
;
3760 if (!so
->so_is_open_owner
)
3763 s
= oo
->oo_last_closed_stid
;
3766 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3767 /* Release the last_closed_stid on the next seqid bump: */
3768 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3771 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3772 release_last_closed_stateid(oo
);
3775 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3777 unhash_open_stateid(s
);
3778 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3782 * nfs4_unlock_state() called after encode
3785 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3786 struct nfsd4_close
*close
)
3789 struct nfs4_openowner
*oo
;
3790 struct nfs4_ol_stateid
*stp
;
3791 struct net
*net
= SVC_NET(rqstp
);
3792 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3794 dprintk("NFSD: nfsd4_close on file %.*s\n",
3795 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3796 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3799 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3801 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3805 oo
= openowner(stp
->st_stateowner
);
3807 update_stateid(&stp
->st_stid
.sc_stateid
);
3808 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3810 nfsd4_close_open_stateid(stp
);
3811 release_last_closed_stateid(oo
);
3812 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3813 oo
->oo_last_closed_stid
= stp
;
3815 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3816 if (cstate
->minorversion
) {
3817 release_openowner(oo
);
3818 cstate
->replay_owner
= NULL
;
3821 * In the 4.0 case we need to keep the owners around a
3822 * little while to handle CLOSE replay.
3824 if (list_empty(&oo
->oo_owner
.so_stateids
))
3825 move_to_close_lru(oo
, SVC_NET(rqstp
));
3829 if (!cstate
->replay_owner
)
3830 nfs4_unlock_state();
3835 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3836 struct nfsd4_delegreturn
*dr
)
3838 struct nfs4_delegation
*dp
;
3839 stateid_t
*stateid
= &dr
->dr_stateid
;
3840 struct nfs4_stid
*s
;
3842 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3844 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3848 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3849 cstate
->minorversion
, nn
);
3852 dp
= delegstateid(s
);
3853 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3857 unhash_delegation(dp
);
3859 nfs4_unlock_state();
3865 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3867 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3870 end_offset(u64 start
, u64 len
)
3875 return end
>= start
? end
: NFS4_MAX_UINT64
;
3878 /* last octet in a range */
3880 last_byte_offset(u64 start
, u64 len
)
3886 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3889 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3891 return (file_hashval(inode
) + cl_id
3892 + opaque_hashval(ownername
->data
, ownername
->len
))
3893 & LOCKOWNER_INO_HASH_MASK
;
3897 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3898 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3899 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3900 * locking, this prevents us from being completely protocol-compliant. The
3901 * real solution to this problem is to start using unsigned file offsets in
3902 * the VFS, but this is a very deep change!
3905 nfs4_transform_lock_offset(struct file_lock
*lock
)
3907 if (lock
->fl_start
< 0)
3908 lock
->fl_start
= OFFSET_MAX
;
3909 if (lock
->fl_end
< 0)
3910 lock
->fl_end
= OFFSET_MAX
;
3913 /* Hack!: For now, we're defining this just so we can use a pointer to it
3914 * as a unique cookie to identify our (NFSv4's) posix locks. */
3915 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3919 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3921 struct nfs4_lockowner
*lo
;
3923 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3924 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3925 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3926 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3927 if (!deny
->ld_owner
.data
)
3928 /* We just don't care that much */
3930 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3931 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3934 deny
->ld_owner
.len
= 0;
3935 deny
->ld_owner
.data
= NULL
;
3936 deny
->ld_clientid
.cl_boot
= 0;
3937 deny
->ld_clientid
.cl_id
= 0;
3939 deny
->ld_start
= fl
->fl_start
;
3940 deny
->ld_length
= NFS4_MAX_UINT64
;
3941 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3942 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3943 deny
->ld_type
= NFS4_READ_LT
;
3944 if (fl
->fl_type
!= F_RDLCK
)
3945 deny
->ld_type
= NFS4_WRITE_LT
;
3948 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3950 struct nfs4_ol_stateid
*lst
;
3952 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3954 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3955 struct nfs4_ol_stateid
, st_perstateowner
);
3956 return lst
->st_file
->fi_inode
== inode
;
3959 static struct nfs4_lockowner
*
3960 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3961 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
3963 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3964 struct nfs4_lockowner
*lo
;
3966 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3967 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3973 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3975 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3976 unsigned int inohash
= lockowner_ino_hashval(inode
,
3977 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3978 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
3980 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
3981 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
3982 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3986 * Alloc a lock owner structure.
3987 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3990 * strhashval = ownerstr_hashval
3993 static struct nfs4_lockowner
*
3994 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3995 struct nfs4_lockowner
*lo
;
3997 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4000 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4001 lo
->lo_owner
.so_is_open_owner
= 0;
4002 /* It is the openowner seqid that will be incremented in encode in the
4003 * case of new lockowners; so increment the lock seqid manually: */
4004 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4005 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4009 static struct nfs4_ol_stateid
*
4010 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4012 struct nfs4_ol_stateid
*stp
;
4013 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4015 stp
= nfs4_alloc_stateid(clp
);
4018 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4019 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4020 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4021 stp
->st_stateowner
= &lo
->lo_owner
;
4024 stp
->st_access_bmap
= 0;
4025 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4026 stp
->st_openstp
= open_stp
;
4031 check_lock_length(u64 offset
, u64 length
)
4033 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4034 LOFF_OVERFLOW(offset
, length
)));
4037 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4039 struct nfs4_file
*fp
= lock_stp
->st_file
;
4040 int oflag
= nfs4_access_to_omode(access
);
4042 if (test_access(access
, lock_stp
))
4044 nfs4_file_get_access(fp
, oflag
);
4045 set_access(access
, lock_stp
);
4048 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)
4050 struct nfs4_file
*fi
= ost
->st_file
;
4051 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4052 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4053 struct nfs4_lockowner
*lo
;
4054 unsigned int strhashval
;
4055 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4057 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4058 &lock
->v
.new.owner
, nn
);
4060 if (!cstate
->minorversion
)
4061 return nfserr_bad_seqid
;
4062 /* XXX: a lockowner always has exactly one stateid: */
4063 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4064 struct nfs4_ol_stateid
, st_perstateowner
);
4067 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4068 &lock
->v
.new.owner
);
4069 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4071 return nfserr_jukebox
;
4072 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4074 release_lockowner(lo
);
4075 return nfserr_jukebox
;
4085 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4086 struct nfsd4_lock
*lock
)
4088 struct nfs4_openowner
*open_sop
= NULL
;
4089 struct nfs4_lockowner
*lock_sop
= NULL
;
4090 struct nfs4_ol_stateid
*lock_stp
;
4091 struct file
*filp
= NULL
;
4092 struct file_lock
*file_lock
= NULL
;
4093 struct file_lock
*conflock
= NULL
;
4095 bool new_state
= false;
4098 struct net
*net
= SVC_NET(rqstp
);
4099 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4101 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4102 (long long) lock
->lk_offset
,
4103 (long long) lock
->lk_length
);
4105 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4106 return nfserr_inval
;
4108 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4109 S_IFREG
, NFSD_MAY_LOCK
))) {
4110 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4116 if (lock
->lk_is_new
) {
4117 struct nfs4_ol_stateid
*open_stp
= NULL
;
4119 if (nfsd4_has_session(cstate
))
4120 /* See rfc 5661 18.10.3: given clientid is ignored: */
4121 memcpy(&lock
->v
.new.clientid
,
4122 &cstate
->session
->se_client
->cl_clientid
,
4123 sizeof(clientid_t
));
4125 status
= nfserr_stale_clientid
;
4126 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4129 /* validate and update open stateid and open seqid */
4130 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4131 lock
->lk_new_open_seqid
,
4132 &lock
->lk_new_open_stateid
,
4136 open_sop
= openowner(open_stp
->st_stateowner
);
4137 status
= nfserr_bad_stateid
;
4138 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4139 &lock
->v
.new.clientid
))
4141 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4142 &lock_stp
, &new_state
);
4144 status
= nfs4_preprocess_seqid_op(cstate
,
4145 lock
->lk_old_lock_seqid
,
4146 &lock
->lk_old_lock_stateid
,
4147 NFS4_LOCK_STID
, &lock_stp
, nn
);
4150 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4152 lkflg
= setlkflg(lock
->lk_type
);
4153 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4157 status
= nfserr_grace
;
4158 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4160 status
= nfserr_no_grace
;
4161 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4164 file_lock
= locks_alloc_lock();
4166 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4167 status
= nfserr_jukebox
;
4171 locks_init_lock(file_lock
);
4172 switch (lock
->lk_type
) {
4175 filp
= find_readable_file(lock_stp
->st_file
);
4177 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4178 file_lock
->fl_type
= F_RDLCK
;
4181 case NFS4_WRITEW_LT
:
4182 filp
= find_writeable_file(lock_stp
->st_file
);
4184 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4185 file_lock
->fl_type
= F_WRLCK
;
4188 status
= nfserr_inval
;
4192 status
= nfserr_openmode
;
4195 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4196 file_lock
->fl_pid
= current
->tgid
;
4197 file_lock
->fl_file
= filp
;
4198 file_lock
->fl_flags
= FL_POSIX
;
4199 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4200 file_lock
->fl_start
= lock
->lk_offset
;
4201 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4202 nfs4_transform_lock_offset(file_lock
);
4204 conflock
= locks_alloc_lock();
4206 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4207 status
= nfserr_jukebox
;
4211 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4213 case 0: /* success! */
4214 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4215 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4219 case (EAGAIN
): /* conflock holds conflicting lock */
4220 status
= nfserr_denied
;
4221 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4222 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4225 status
= nfserr_deadlock
;
4228 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4229 status
= nfserrno(err
);
4233 if (status
&& new_state
)
4234 release_lockowner(lock_sop
);
4235 if (!cstate
->replay_owner
)
4236 nfs4_unlock_state();
4238 locks_free_lock(file_lock
);
4240 locks_free_lock(conflock
);
4245 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4246 * so we do a temporary open here just to get an open file to pass to
4247 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4250 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4253 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4255 err
= nfserrno(vfs_test_lock(file
, lock
));
4265 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4266 struct nfsd4_lockt
*lockt
)
4268 struct inode
*inode
;
4269 struct file_lock
*file_lock
= NULL
;
4270 struct nfs4_lockowner
*lo
;
4272 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4274 if (locks_in_grace(SVC_NET(rqstp
)))
4275 return nfserr_grace
;
4277 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4278 return nfserr_inval
;
4282 if (!nfsd4_has_session(cstate
)) {
4283 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4288 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4291 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4292 file_lock
= locks_alloc_lock();
4294 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4295 status
= nfserr_jukebox
;
4298 locks_init_lock(file_lock
);
4299 switch (lockt
->lt_type
) {
4302 file_lock
->fl_type
= F_RDLCK
;
4305 case NFS4_WRITEW_LT
:
4306 file_lock
->fl_type
= F_WRLCK
;
4309 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4310 status
= nfserr_inval
;
4314 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4316 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4317 file_lock
->fl_pid
= current
->tgid
;
4318 file_lock
->fl_flags
= FL_POSIX
;
4320 file_lock
->fl_start
= lockt
->lt_offset
;
4321 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4323 nfs4_transform_lock_offset(file_lock
);
4325 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4329 if (file_lock
->fl_type
!= F_UNLCK
) {
4330 status
= nfserr_denied
;
4331 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4334 nfs4_unlock_state();
4336 locks_free_lock(file_lock
);
4341 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4342 struct nfsd4_locku
*locku
)
4344 struct nfs4_ol_stateid
*stp
;
4345 struct file
*filp
= NULL
;
4346 struct file_lock
*file_lock
= NULL
;
4349 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4351 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4352 (long long) locku
->lu_offset
,
4353 (long long) locku
->lu_length
);
4355 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4356 return nfserr_inval
;
4360 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4361 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4365 filp
= find_any_file(stp
->st_file
);
4367 status
= nfserr_lock_range
;
4370 file_lock
= locks_alloc_lock();
4372 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4373 status
= nfserr_jukebox
;
4376 locks_init_lock(file_lock
);
4377 file_lock
->fl_type
= F_UNLCK
;
4378 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4379 file_lock
->fl_pid
= current
->tgid
;
4380 file_lock
->fl_file
= filp
;
4381 file_lock
->fl_flags
= FL_POSIX
;
4382 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4383 file_lock
->fl_start
= locku
->lu_offset
;
4385 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4387 nfs4_transform_lock_offset(file_lock
);
4390 * Try to unlock the file in the VFS.
4392 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4394 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4398 * OK, unlock succeeded; the only thing left to do is update the stateid.
4400 update_stateid(&stp
->st_stid
.sc_stateid
);
4401 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4404 if (!cstate
->replay_owner
)
4405 nfs4_unlock_state();
4407 locks_free_lock(file_lock
);
4411 status
= nfserrno(err
);
4417 * 1: locks held by lockowner
4418 * 0: no locks held by lockowner
4421 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4423 struct file_lock
**flpp
;
4424 struct inode
*inode
= filp
->fi_inode
;
4428 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4429 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4440 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4441 struct nfsd4_compound_state
*cstate
,
4442 struct nfsd4_release_lockowner
*rlockowner
)
4444 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4445 struct nfs4_stateowner
*sop
;
4446 struct nfs4_lockowner
*lo
;
4447 struct nfs4_ol_stateid
*stp
;
4448 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4449 struct list_head matches
;
4450 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4452 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4454 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4455 clid
->cl_boot
, clid
->cl_id
);
4459 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4463 status
= nfserr_locks_held
;
4464 INIT_LIST_HEAD(&matches
);
4466 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4467 if (sop
->so_is_open_owner
)
4469 if (!same_owner_str(sop
, owner
, clid
))
4471 list_for_each_entry(stp
, &sop
->so_stateids
,
4473 lo
= lockowner(sop
);
4474 if (check_for_locks(stp
->st_file
, lo
))
4476 list_add(&lo
->lo_list
, &matches
);
4479 /* Clients probably won't expect us to return with some (but not all)
4480 * of the lockowner state released; so don't release any until all
4481 * have been checked. */
4483 while (!list_empty(&matches
)) {
4484 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4486 /* unhash_stateowner deletes so_perclient only
4487 * for openowners. */
4488 list_del(&lo
->lo_list
);
4489 release_lockowner(lo
);
4492 nfs4_unlock_state();
4496 static inline struct nfs4_client_reclaim
*
4499 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4503 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4505 struct nfs4_client_reclaim
*crp
;
4507 crp
= nfsd4_find_reclaim_client(name
, nn
);
4508 return (crp
&& crp
->cr_clp
);
4512 * failure => all reset bets are off, nfserr_no_grace...
4514 struct nfs4_client_reclaim
*
4515 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4517 unsigned int strhashval
;
4518 struct nfs4_client_reclaim
*crp
;
4520 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4521 crp
= alloc_reclaim();
4523 strhashval
= clientstr_hashval(name
);
4524 INIT_LIST_HEAD(&crp
->cr_strhash
);
4525 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4526 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4528 nn
->reclaim_str_hashtbl_size
++;
4534 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4536 list_del(&crp
->cr_strhash
);
4538 nn
->reclaim_str_hashtbl_size
--;
4542 nfs4_release_reclaim(struct nfsd_net
*nn
)
4544 struct nfs4_client_reclaim
*crp
= NULL
;
4547 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4548 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4549 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4550 struct nfs4_client_reclaim
, cr_strhash
);
4551 nfs4_remove_reclaim_record(crp
, nn
);
4554 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4558 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4559 struct nfs4_client_reclaim
*
4560 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4562 unsigned int strhashval
;
4563 struct nfs4_client_reclaim
*crp
= NULL
;
4565 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4567 strhashval
= clientstr_hashval(recdir
);
4568 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4569 if (same_name(crp
->cr_recdir
, recdir
)) {
4577 * Called from OPEN. Look for clientid in reclaim list.
4580 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4582 struct nfs4_client
*clp
;
4584 /* find clientid in conf_id_hashtbl */
4585 clp
= find_confirmed_client(clid
, sessions
, nn
);
4587 return nfserr_reclaim_bad
;
4589 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4592 #ifdef CONFIG_NFSD_FAULT_INJECTION
4594 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4600 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4602 char buf
[INET6_ADDRSTRLEN
];
4603 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4604 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4608 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4611 char buf
[INET6_ADDRSTRLEN
];
4612 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4613 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4616 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4618 struct nfs4_openowner
*oop
;
4619 struct nfs4_lockowner
*lop
, *lo_next
;
4620 struct nfs4_ol_stateid
*stp
, *st_next
;
4623 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4624 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4625 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4637 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4639 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4642 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4644 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4645 nfsd_print_count(clp
, count
, "locked files");
4649 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4651 struct nfs4_openowner
*oop
, *next
;
4654 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4664 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4666 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4669 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4671 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4672 nfsd_print_count(clp
, count
, "open files");
4676 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4677 struct list_head
*victims
)
4679 struct nfs4_delegation
*dp
, *next
;
4682 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4684 list_move(&dp
->dl_recall_lru
, victims
);
4691 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4693 struct nfs4_delegation
*dp
, *next
;
4697 spin_lock(&recall_lock
);
4698 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4699 spin_unlock(&recall_lock
);
4701 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4702 unhash_delegation(dp
);
4707 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4709 struct nfs4_delegation
*dp
, *next
;
4713 spin_lock(&recall_lock
);
4714 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4715 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4716 nfsd_break_one_deleg(dp
);
4717 spin_unlock(&recall_lock
);
4722 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4726 spin_lock(&recall_lock
);
4727 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4728 spin_unlock(&recall_lock
);
4730 nfsd_print_count(clp
, count
, "delegations");
4734 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4736 struct nfs4_client
*clp
, *next
;
4738 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4740 if (!nfsd_netns_ready(nn
))
4743 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4744 count
+= func(clp
, max
- count
);
4745 if ((max
!= 0) && (count
>= max
))
4752 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4754 struct nfs4_client
*clp
;
4755 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4757 if (!nfsd_netns_ready(nn
))
4760 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4761 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4767 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4769 /* initialization to perform at module load time: */
4772 nfs4_state_init(void)
4776 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4777 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4779 INIT_LIST_HEAD(&del_recall_lru
);
4783 * Since the lifetime of a delegation isn't limited to that of an open, a
4784 * client may quite reasonably hang on to a delegation as long as it has
4785 * the inode cached. This becomes an obvious problem the first time a
4786 * client's inode cache approaches the size of the server's total memory.
4788 * For now we avoid this problem by imposing a hard limit on the number
4789 * of delegations, which varies according to the server's memory size.
4792 set_max_delegations(void)
4795 * Allow at most 4 delegations per megabyte of RAM. Quick
4796 * estimates suggest that in the worst case (where every delegation
4797 * is for a different inode), a delegation could take about 1.5K,
4798 * giving a worst case usage of about 6% of memory.
4800 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4803 static int nfs4_state_create_net(struct net
*net
)
4805 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4808 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4809 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4810 if (!nn
->conf_id_hashtbl
)
4812 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4813 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4814 if (!nn
->unconf_id_hashtbl
)
4816 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4817 OWNER_HASH_SIZE
, GFP_KERNEL
);
4818 if (!nn
->ownerstr_hashtbl
)
4820 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4821 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4822 if (!nn
->lockowner_ino_hashtbl
)
4823 goto err_lockowner_ino
;
4824 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4825 SESSION_HASH_SIZE
, GFP_KERNEL
);
4826 if (!nn
->sessionid_hashtbl
)
4829 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4830 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4831 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4833 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4834 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4835 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4836 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4837 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4838 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4839 nn
->conf_name_tree
= RB_ROOT
;
4840 nn
->unconf_name_tree
= RB_ROOT
;
4841 INIT_LIST_HEAD(&nn
->client_lru
);
4842 INIT_LIST_HEAD(&nn
->close_lru
);
4843 spin_lock_init(&nn
->client_lock
);
4845 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4851 kfree(nn
->lockowner_ino_hashtbl
);
4853 kfree(nn
->ownerstr_hashtbl
);
4855 kfree(nn
->unconf_id_hashtbl
);
4857 kfree(nn
->conf_id_hashtbl
);
4863 nfs4_state_destroy_net(struct net
*net
)
4866 struct nfs4_client
*clp
= NULL
;
4867 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4868 struct rb_node
*node
, *tmp
;
4870 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4871 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4872 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4873 destroy_client(clp
);
4877 node
= rb_first(&nn
->unconf_name_tree
);
4878 while (node
!= NULL
) {
4880 node
= rb_next(tmp
);
4881 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4882 rb_erase(tmp
, &nn
->unconf_name_tree
);
4883 destroy_client(clp
);
4886 kfree(nn
->sessionid_hashtbl
);
4887 kfree(nn
->lockowner_ino_hashtbl
);
4888 kfree(nn
->ownerstr_hashtbl
);
4889 kfree(nn
->unconf_id_hashtbl
);
4890 kfree(nn
->conf_id_hashtbl
);
4895 nfs4_state_start_net(struct net
*net
)
4897 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4900 ret
= nfs4_state_create_net(net
);
4903 nfsd4_client_tracking_init(net
);
4904 nn
->boot_time
= get_seconds();
4905 locks_start_grace(net
, &nn
->nfsd4_manager
);
4906 nn
->grace_ended
= false;
4907 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
4908 nn
->nfsd4_grace
, net
);
4909 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
4913 /* initialization to perform when the nfsd service is started: */
4916 nfs4_state_start(void)
4920 ret
= set_callback_cred();
4923 laundry_wq
= create_singlethread_workqueue("nfsd4");
4924 if (laundry_wq
== NULL
) {
4928 ret
= nfsd4_create_callback_queue();
4930 goto out_free_laundry
;
4932 set_max_delegations();
4937 destroy_workqueue(laundry_wq
);
4942 /* should be called with the state lock held */
4944 nfs4_state_shutdown_net(struct net
*net
)
4946 struct nfs4_delegation
*dp
= NULL
;
4947 struct list_head
*pos
, *next
, reaplist
;
4948 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4950 cancel_delayed_work_sync(&nn
->laundromat_work
);
4951 locks_end_grace(&nn
->nfsd4_manager
);
4953 INIT_LIST_HEAD(&reaplist
);
4954 spin_lock(&recall_lock
);
4955 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4956 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4957 if (dp
->dl_stid
.sc_client
->net
!= net
)
4959 list_move(&dp
->dl_recall_lru
, &reaplist
);
4961 spin_unlock(&recall_lock
);
4962 list_for_each_safe(pos
, next
, &reaplist
) {
4963 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4964 unhash_delegation(dp
);
4967 nfsd4_client_tracking_exit(net
);
4968 nfs4_state_destroy_net(net
);
4972 nfs4_state_shutdown(void)
4974 destroy_workqueue(laundry_wq
);
4975 nfsd4_destroy_callback_queue();
4979 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4981 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4982 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4986 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4988 if (cstate
->minorversion
) {
4989 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4990 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4995 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
4997 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5001 * functions to set current state id
5004 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5006 put_stateid(cstate
, &odp
->od_stateid
);
5010 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5012 put_stateid(cstate
, &open
->op_stateid
);
5016 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5018 put_stateid(cstate
, &close
->cl_stateid
);
5022 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5024 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5028 * functions to consume current state id
5032 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5034 get_stateid(cstate
, &odp
->od_stateid
);
5038 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5040 get_stateid(cstate
, &drp
->dr_stateid
);
5044 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5046 get_stateid(cstate
, &fsp
->fr_stateid
);
5050 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5052 get_stateid(cstate
, &setattr
->sa_stateid
);
5056 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5058 get_stateid(cstate
, &close
->cl_stateid
);
5062 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5064 get_stateid(cstate
, &locku
->lu_stateid
);
5068 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5070 get_stateid(cstate
, &read
->rd_stateid
);
5074 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5076 get_stateid(cstate
, &write
->wr_stateid
);