2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
42 #include <linux/sunrpc/clnt.h>
46 #define NFSDDBG_FACILITY NFSDDBG_PROC
49 time_t nfsd4_lease
= 90; /* default lease time */
50 time_t nfsd4_grace
= 90;
51 static time_t boot_time
;
52 static stateid_t zerostateid
; /* bits all 0 */
53 static stateid_t onestateid
; /* bits all 1 */
54 static u64 current_sessionid
= 1;
56 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
57 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
59 /* forward declarations */
60 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
64 /* Currently used for almost all code touching nfsv4 state: */
65 static DEFINE_MUTEX(client_mutex
);
68 * Currently used for the del_recall_lru and file hash table. In an
69 * effort to decrease the scope of the client_mutex, this spinlock may
70 * eventually cover more:
72 static DEFINE_SPINLOCK(recall_lock
);
74 static struct kmem_cache
*openowner_slab
= NULL
;
75 static struct kmem_cache
*lockowner_slab
= NULL
;
76 static struct kmem_cache
*file_slab
= NULL
;
77 static struct kmem_cache
*stateid_slab
= NULL
;
78 static struct kmem_cache
*deleg_slab
= NULL
;
83 mutex_lock(&client_mutex
);
87 nfs4_unlock_state(void)
89 mutex_unlock(&client_mutex
);
93 opaque_hashval(const void *ptr
, int nbytes
)
95 unsigned char *cptr
= (unsigned char *) ptr
;
105 static struct list_head del_recall_lru
;
107 static void nfsd4_free_file(struct nfs4_file
*f
)
109 kmem_cache_free(file_slab
, f
);
113 put_nfs4_file(struct nfs4_file
*fi
)
115 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
116 list_del(&fi
->fi_hash
);
117 spin_unlock(&recall_lock
);
124 get_nfs4_file(struct nfs4_file
*fi
)
126 atomic_inc(&fi
->fi_ref
);
129 static int num_delegations
;
130 unsigned int max_delegations
;
133 * Open owner state (share locks)
136 /* hash tables for open owners */
137 #define OPEN_OWNER_HASH_BITS 8
138 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
139 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
141 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
145 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
147 return ret
& OPEN_OWNER_HASH_MASK
;
150 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
152 /* hash table for nfs4_file */
153 #define FILE_HASH_BITS 8
154 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
156 static unsigned int file_hashval(struct inode
*ino
)
158 /* XXX: why are we hashing on inode pointer, anyway? */
159 return hash_ptr(ino
, FILE_HASH_BITS
);
162 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
164 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
166 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
167 atomic_inc(&fp
->fi_access
[oflag
]);
170 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
172 if (oflag
== O_RDWR
) {
173 __nfs4_file_get_access(fp
, O_RDONLY
);
174 __nfs4_file_get_access(fp
, O_WRONLY
);
176 __nfs4_file_get_access(fp
, oflag
);
179 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
181 if (fp
->fi_fds
[oflag
]) {
182 fput(fp
->fi_fds
[oflag
]);
183 fp
->fi_fds
[oflag
] = NULL
;
187 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
189 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
190 nfs4_file_put_fd(fp
, oflag
);
192 * It's also safe to get rid of the RDWR open *if*
193 * we no longer have need of the other kind of access
194 * or if we already have the other kind of open:
196 if (fp
->fi_fds
[1-oflag
]
197 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
198 nfs4_file_put_fd(fp
, O_RDWR
);
202 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
204 if (oflag
== O_RDWR
) {
205 __nfs4_file_put_access(fp
, O_RDONLY
);
206 __nfs4_file_put_access(fp
, O_WRONLY
);
208 __nfs4_file_put_access(fp
, oflag
);
211 static inline int get_new_stid(struct nfs4_stid
*stid
)
213 static int min_stateid
= 0;
214 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
218 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
220 * Note: the necessary preallocation was done in
221 * nfs4_alloc_stateid(). The idr code caps the number of
222 * preallocations that can exist at a time, but the state lock
223 * prevents anyone from using ours before we get here:
227 * It shouldn't be a problem to reuse an opaque stateid value.
228 * I don't think it is for 4.1. But with 4.0 I worry that, for
229 * example, a stray write retransmission could be accepted by
230 * the server when it should have been rejected. Therefore,
231 * adopt a trick from the sctp code to attempt to maximize the
232 * amount of time until an id is reused, by ensuring they always
233 * "increase" (mod INT_MAX):
236 min_stateid
= new_stid
+1;
237 if (min_stateid
== INT_MAX
)
242 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
244 stateid_t
*s
= &stid
->sc_stateid
;
247 stid
->sc_type
= type
;
248 stid
->sc_client
= cl
;
249 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
250 new_id
= get_new_stid(stid
);
251 s
->si_opaque
.so_id
= (u32
)new_id
;
252 /* Will be incremented before return to client: */
253 s
->si_generation
= 0;
256 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
258 struct idr
*stateids
= &cl
->cl_stateids
;
260 if (!idr_pre_get(stateids
, GFP_KERNEL
))
263 * Note: if we fail here (or any time between now and the time
264 * we actually get the new idr), we won't need to undo the idr
265 * preallocation, since the idr code caps the number of
266 * preallocated entries.
268 return kmem_cache_alloc(slab
, GFP_KERNEL
);
271 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
273 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
276 static struct nfs4_delegation
*
277 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
279 struct nfs4_delegation
*dp
;
280 struct nfs4_file
*fp
= stp
->st_file
;
282 dprintk("NFSD alloc_init_deleg\n");
284 * Major work on the lease subsystem (for example, to support
285 * calbacks on stat) will be required before we can support
286 * write delegations properly.
288 if (type
!= NFS4_OPEN_DELEGATE_READ
)
290 if (fp
->fi_had_conflict
)
292 if (num_delegations
> max_delegations
)
294 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
297 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
299 * delegation seqid's are never incremented. The 4.1 special
300 * meaning of seqid 0 isn't meaningful, really, but let's avoid
301 * 0 anyway just for consistency and use 1:
303 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
305 INIT_LIST_HEAD(&dp
->dl_perfile
);
306 INIT_LIST_HEAD(&dp
->dl_perclnt
);
307 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
311 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
313 atomic_set(&dp
->dl_count
, 1);
314 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
319 nfs4_put_delegation(struct nfs4_delegation
*dp
)
321 if (atomic_dec_and_test(&dp
->dl_count
)) {
322 dprintk("NFSD: freeing dp %p\n",dp
);
323 put_nfs4_file(dp
->dl_file
);
324 kmem_cache_free(deleg_slab
, dp
);
329 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
331 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
332 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
334 fput(fp
->fi_deleg_file
);
335 fp
->fi_deleg_file
= NULL
;
339 static void unhash_stid(struct nfs4_stid
*s
)
341 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
343 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
346 /* Called under the state lock. */
348 unhash_delegation(struct nfs4_delegation
*dp
)
350 unhash_stid(&dp
->dl_stid
);
351 list_del_init(&dp
->dl_perclnt
);
352 spin_lock(&recall_lock
);
353 list_del_init(&dp
->dl_perfile
);
354 list_del_init(&dp
->dl_recall_lru
);
355 spin_unlock(&recall_lock
);
356 nfs4_put_deleg_lease(dp
->dl_file
);
357 nfs4_put_delegation(dp
);
364 /* client_lock protects the client lru list and session hash table */
365 static DEFINE_SPINLOCK(client_lock
);
367 /* Hash tables for nfs4_clientid state */
368 #define CLIENT_HASH_BITS 4
369 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
370 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
372 static unsigned int clientid_hashval(u32 id
)
374 return id
& CLIENT_HASH_MASK
;
377 static unsigned int clientstr_hashval(const char *name
)
379 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
383 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
384 * used in reboot/reset lease grace period processing
386 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
387 * setclientid_confirmed info.
389 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
392 * client_lru holds client queue ordered by nfs4_client.cl_time
395 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
396 * for last close replay.
398 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
399 static int reclaim_str_hashtbl_size
= 0;
400 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
401 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
402 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
403 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
404 static struct list_head client_lru
;
405 static struct list_head close_lru
;
408 * We store the NONE, READ, WRITE, and BOTH bits separately in the
409 * st_{access,deny}_bmap field of the stateid, in order to track not
410 * only what share bits are currently in force, but also what
411 * combinations of share bits previous opens have used. This allows us
412 * to enforce the recommendation of rfc 3530 14.2.19 that the server
413 * return an error if the client attempt to downgrade to a combination
414 * of share bits not explicable by closing some of its previous opens.
416 * XXX: This enforcement is actually incomplete, since we don't keep
417 * track of access/deny bit combinations; so, e.g., we allow:
419 * OPEN allow read, deny write
420 * OPEN allow both, deny none
421 * DOWNGRADE allow read, deny none
423 * which we should reject.
426 set_access(unsigned int *access
, unsigned long bmap
) {
430 for (i
= 1; i
< 4; i
++) {
431 if (test_bit(i
, &bmap
))
437 set_deny(unsigned int *deny
, unsigned long bmap
) {
441 for (i
= 0; i
< 4; i
++) {
442 if (test_bit(i
, &bmap
))
448 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
449 unsigned int access
, deny
;
451 set_access(&access
, stp
->st_access_bmap
);
452 set_deny(&deny
, stp
->st_deny_bmap
);
453 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
458 static int nfs4_access_to_omode(u32 access
)
460 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
461 case NFS4_SHARE_ACCESS_READ
:
463 case NFS4_SHARE_ACCESS_WRITE
:
465 case NFS4_SHARE_ACCESS_BOTH
:
471 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
473 list_del(&stp
->st_perfile
);
474 list_del(&stp
->st_perstateowner
);
477 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
481 if (stp
->st_access_bmap
) {
482 for (i
= 1; i
< 4; i
++) {
483 if (test_bit(i
, &stp
->st_access_bmap
))
484 nfs4_file_put_access(stp
->st_file
,
485 nfs4_access_to_omode(i
));
486 __clear_bit(i
, &stp
->st_access_bmap
);
489 put_nfs4_file(stp
->st_file
);
493 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
495 kmem_cache_free(stateid_slab
, stp
);
498 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
502 unhash_generic_stateid(stp
);
503 unhash_stid(&stp
->st_stid
);
504 file
= find_any_file(stp
->st_file
);
506 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
507 close_generic_stateid(stp
);
508 free_generic_stateid(stp
);
511 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
513 struct nfs4_ol_stateid
*stp
;
515 list_del(&lo
->lo_owner
.so_strhash
);
516 list_del(&lo
->lo_perstateid
);
517 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
518 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
519 struct nfs4_ol_stateid
, st_perstateowner
);
520 release_lock_stateid(stp
);
524 static void release_lockowner(struct nfs4_lockowner
*lo
)
526 unhash_lockowner(lo
);
527 nfs4_free_lockowner(lo
);
531 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
533 struct nfs4_lockowner
*lo
;
535 while (!list_empty(&open_stp
->st_lockowners
)) {
536 lo
= list_entry(open_stp
->st_lockowners
.next
,
537 struct nfs4_lockowner
, lo_perstateid
);
538 release_lockowner(lo
);
542 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
544 unhash_generic_stateid(stp
);
545 release_stateid_lockowners(stp
);
546 close_generic_stateid(stp
);
549 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
551 unhash_open_stateid(stp
);
552 unhash_stid(&stp
->st_stid
);
553 free_generic_stateid(stp
);
556 static void unhash_openowner(struct nfs4_openowner
*oo
)
558 struct nfs4_ol_stateid
*stp
;
560 list_del(&oo
->oo_owner
.so_strhash
);
561 list_del(&oo
->oo_perclient
);
562 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
563 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
564 struct nfs4_ol_stateid
, st_perstateowner
);
565 release_open_stateid(stp
);
569 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
571 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
574 unhash_stid(&s
->st_stid
);
575 free_generic_stateid(s
);
576 oo
->oo_last_closed_stid
= NULL
;
580 static void release_openowner(struct nfs4_openowner
*oo
)
582 unhash_openowner(oo
);
583 list_del(&oo
->oo_close_lru
);
584 release_last_closed_stateid(oo
);
585 nfs4_free_openowner(oo
);
588 #define SESSION_HASH_SIZE 512
589 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
592 hash_sessionid(struct nfs4_sessionid
*sessionid
)
594 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
596 return sid
->sequence
% SESSION_HASH_SIZE
;
600 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
602 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
603 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
607 gen_sessionid(struct nfsd4_session
*ses
)
609 struct nfs4_client
*clp
= ses
->se_client
;
610 struct nfsd4_sessionid
*sid
;
612 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
613 sid
->clientid
= clp
->cl_clientid
;
614 sid
->sequence
= current_sessionid
++;
619 * The protocol defines ca_maxresponssize_cached to include the size of
620 * the rpc header, but all we need to cache is the data starting after
621 * the end of the initial SEQUENCE operation--the rest we regenerate
622 * each time. Therefore we can advertise a ca_maxresponssize_cached
623 * value that is the number of bytes in our cache plus a few additional
624 * bytes. In order to stay on the safe side, and not promise more than
625 * we can cache, those additional bytes must be the minimum possible: 24
626 * bytes of rpc header (xid through accept state, with AUTH_NULL
627 * verifier), 12 for the compound header (with zero-length tag), and 44
628 * for the SEQUENCE op response:
630 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
633 free_session_slots(struct nfsd4_session
*ses
)
637 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
638 kfree(ses
->se_slots
[i
]);
642 * We don't actually need to cache the rpc and session headers, so we
643 * can allocate a little less for each slot:
645 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
647 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
650 static int nfsd4_sanitize_slot_size(u32 size
)
652 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
653 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
659 * XXX: If we run out of reserved DRC memory we could (up to a point)
660 * re-negotiate active sessions and reduce their slot usage to make
661 * rooom for new connections. For now we just fail the create session.
663 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
667 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
669 spin_lock(&nfsd_drc_lock
);
670 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
671 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
672 num
= min_t(int, num
, avail
/ slotsize
);
673 nfsd_drc_mem_used
+= num
* slotsize
;
674 spin_unlock(&nfsd_drc_lock
);
679 static void nfsd4_put_drc_mem(int slotsize
, int num
)
681 spin_lock(&nfsd_drc_lock
);
682 nfsd_drc_mem_used
-= slotsize
* num
;
683 spin_unlock(&nfsd_drc_lock
);
686 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
688 struct nfsd4_session
*new;
691 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
692 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
693 mem
= numslots
* sizeof(struct nfsd4_slot
*);
695 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
698 /* allocate each struct nfsd4_slot and data cache in one piece */
699 for (i
= 0; i
< numslots
; i
++) {
700 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
701 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
702 if (!new->se_slots
[i
])
708 kfree(new->se_slots
[i
]);
713 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
715 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
717 new->maxreqs
= numslots
;
718 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
719 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
720 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
721 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
722 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
725 static void free_conn(struct nfsd4_conn
*c
)
727 svc_xprt_put(c
->cn_xprt
);
731 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
733 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
734 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
736 spin_lock(&clp
->cl_lock
);
737 if (!list_empty(&c
->cn_persession
)) {
738 list_del(&c
->cn_persession
);
741 spin_unlock(&clp
->cl_lock
);
742 nfsd4_probe_callback(clp
);
745 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
747 struct nfsd4_conn
*conn
;
749 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
752 svc_xprt_get(rqstp
->rq_xprt
);
753 conn
->cn_xprt
= rqstp
->rq_xprt
;
754 conn
->cn_flags
= flags
;
755 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
759 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
761 conn
->cn_session
= ses
;
762 list_add(&conn
->cn_persession
, &ses
->se_conns
);
765 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
767 struct nfs4_client
*clp
= ses
->se_client
;
769 spin_lock(&clp
->cl_lock
);
770 __nfsd4_hash_conn(conn
, ses
);
771 spin_unlock(&clp
->cl_lock
);
774 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
776 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
777 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
780 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
782 struct nfsd4_conn
*conn
;
785 conn
= alloc_conn(rqstp
, dir
);
787 return nfserr_jukebox
;
788 nfsd4_hash_conn(conn
, ses
);
789 ret
= nfsd4_register_conn(conn
);
791 /* oops; xprt is already down: */
792 nfsd4_conn_lost(&conn
->cn_xpt_user
);
796 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
798 u32 dir
= NFS4_CDFC4_FORE
;
800 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
801 dir
|= NFS4_CDFC4_BACK
;
803 return nfsd4_new_conn(rqstp
, ses
, dir
);
806 /* must be called under client_lock */
807 static void nfsd4_del_conns(struct nfsd4_session
*s
)
809 struct nfs4_client
*clp
= s
->se_client
;
810 struct nfsd4_conn
*c
;
812 spin_lock(&clp
->cl_lock
);
813 while (!list_empty(&s
->se_conns
)) {
814 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
815 list_del_init(&c
->cn_persession
);
816 spin_unlock(&clp
->cl_lock
);
818 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
821 spin_lock(&clp
->cl_lock
);
823 spin_unlock(&clp
->cl_lock
);
826 void free_session(struct kref
*kref
)
828 struct nfsd4_session
*ses
;
831 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
832 nfsd4_del_conns(ses
);
833 spin_lock(&nfsd_drc_lock
);
834 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
835 nfsd_drc_mem_used
-= mem
;
836 spin_unlock(&nfsd_drc_lock
);
837 free_session_slots(ses
);
841 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
843 struct nfsd4_session
*new;
844 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
845 int numslots
, slotsize
;
850 * Note decreasing slot size below client's request may
851 * make it difficult for client to function correctly, whereas
852 * decreasing the number of slots will (just?) affect
853 * performance. When short on memory we therefore prefer to
854 * decrease number of slots instead of their size.
856 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
857 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
861 new = alloc_session(slotsize
, numslots
);
863 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
866 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
868 new->se_client
= clp
;
871 INIT_LIST_HEAD(&new->se_conns
);
873 new->se_cb_seq_nr
= 1;
874 new->se_flags
= cses
->flags
;
875 new->se_cb_prog
= cses
->callback_prog
;
876 kref_init(&new->se_ref
);
877 idx
= hash_sessionid(&new->se_sessionid
);
878 spin_lock(&client_lock
);
879 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
880 spin_lock(&clp
->cl_lock
);
881 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
882 spin_unlock(&clp
->cl_lock
);
883 spin_unlock(&client_lock
);
885 status
= nfsd4_new_conn_from_crses(rqstp
, new);
886 /* whoops: benny points out, status is ignored! (err, or bogus) */
888 free_session(&new->se_ref
);
891 if (cses
->flags
& SESSION4_BACK_CHAN
) {
892 struct sockaddr
*sa
= svc_addr(rqstp
);
894 * This is a little silly; with sessions there's no real
895 * use for the callback address. Use the peer address
896 * as a reasonable default for now, but consider fixing
897 * the rpc client not to require an address in the
900 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
901 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
903 nfsd4_probe_callback(clp
);
907 /* caller must hold client_lock */
908 static struct nfsd4_session
*
909 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
911 struct nfsd4_session
*elem
;
914 dump_sessionid(__func__
, sessionid
);
915 idx
= hash_sessionid(sessionid
);
916 /* Search in the appropriate list */
917 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
918 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
919 NFS4_MAX_SESSIONID_LEN
)) {
924 dprintk("%s: session not found\n", __func__
);
928 /* caller must hold client_lock */
930 unhash_session(struct nfsd4_session
*ses
)
932 list_del(&ses
->se_hash
);
933 spin_lock(&ses
->se_client
->cl_lock
);
934 list_del(&ses
->se_perclnt
);
935 spin_unlock(&ses
->se_client
->cl_lock
);
938 /* must be called under the client_lock */
940 renew_client_locked(struct nfs4_client
*clp
)
942 if (is_client_expired(clp
)) {
943 dprintk("%s: client (clientid %08x/%08x) already expired\n",
945 clp
->cl_clientid
.cl_boot
,
946 clp
->cl_clientid
.cl_id
);
950 dprintk("renewing client (clientid %08x/%08x)\n",
951 clp
->cl_clientid
.cl_boot
,
952 clp
->cl_clientid
.cl_id
);
953 list_move_tail(&clp
->cl_lru
, &client_lru
);
954 clp
->cl_time
= get_seconds();
958 renew_client(struct nfs4_client
*clp
)
960 spin_lock(&client_lock
);
961 renew_client_locked(clp
);
962 spin_unlock(&client_lock
);
965 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
967 STALE_CLIENTID(clientid_t
*clid
)
969 if (clid
->cl_boot
== boot_time
)
971 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
972 clid
->cl_boot
, clid
->cl_id
, boot_time
);
977 * XXX Should we use a slab cache ?
978 * This type of memory management is somewhat inefficient, but we use it
979 * anyway since SETCLIENTID is not a common operation.
981 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
983 struct nfs4_client
*clp
;
985 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
988 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
989 if (clp
->cl_name
.data
== NULL
) {
993 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
994 clp
->cl_name
.len
= name
.len
;
999 free_client(struct nfs4_client
*clp
)
1001 while (!list_empty(&clp
->cl_sessions
)) {
1002 struct nfsd4_session
*ses
;
1003 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1005 list_del(&ses
->se_perclnt
);
1006 nfsd4_put_session(ses
);
1008 if (clp
->cl_cred
.cr_group_info
)
1009 put_group_info(clp
->cl_cred
.cr_group_info
);
1010 kfree(clp
->cl_principal
);
1011 kfree(clp
->cl_name
.data
);
1016 release_session_client(struct nfsd4_session
*session
)
1018 struct nfs4_client
*clp
= session
->se_client
;
1020 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1022 if (is_client_expired(clp
)) {
1024 session
->se_client
= NULL
;
1026 renew_client_locked(clp
);
1027 spin_unlock(&client_lock
);
1030 /* must be called under the client_lock */
1032 unhash_client_locked(struct nfs4_client
*clp
)
1034 struct nfsd4_session
*ses
;
1036 mark_client_expired(clp
);
1037 list_del(&clp
->cl_lru
);
1038 spin_lock(&clp
->cl_lock
);
1039 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1040 list_del_init(&ses
->se_hash
);
1041 spin_unlock(&clp
->cl_lock
);
1045 expire_client(struct nfs4_client
*clp
)
1047 struct nfs4_openowner
*oo
;
1048 struct nfs4_delegation
*dp
;
1049 struct list_head reaplist
;
1051 INIT_LIST_HEAD(&reaplist
);
1052 spin_lock(&recall_lock
);
1053 while (!list_empty(&clp
->cl_delegations
)) {
1054 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1055 list_del_init(&dp
->dl_perclnt
);
1056 list_move(&dp
->dl_recall_lru
, &reaplist
);
1058 spin_unlock(&recall_lock
);
1059 while (!list_empty(&reaplist
)) {
1060 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1061 list_del_init(&dp
->dl_recall_lru
);
1062 unhash_delegation(dp
);
1064 while (!list_empty(&clp
->cl_openowners
)) {
1065 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1066 release_openowner(oo
);
1068 nfsd4_shutdown_callback(clp
);
1069 if (clp
->cl_cb_conn
.cb_xprt
)
1070 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1071 list_del(&clp
->cl_idhash
);
1072 list_del(&clp
->cl_strhash
);
1073 spin_lock(&client_lock
);
1074 unhash_client_locked(clp
);
1075 if (atomic_read(&clp
->cl_refcount
) == 0)
1077 spin_unlock(&client_lock
);
1080 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1082 memcpy(target
->cl_verifier
.data
, source
->data
,
1083 sizeof(target
->cl_verifier
.data
));
1086 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1088 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1089 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1092 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1094 target
->cr_uid
= source
->cr_uid
;
1095 target
->cr_gid
= source
->cr_gid
;
1096 target
->cr_group_info
= source
->cr_group_info
;
1097 get_group_info(target
->cr_group_info
);
1100 static int same_name(const char *n1
, const char *n2
)
1102 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1106 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1108 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1112 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1114 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1117 /* XXX what about NGROUP */
1119 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1121 return cr1
->cr_uid
== cr2
->cr_uid
;
1124 static void gen_clid(struct nfs4_client
*clp
)
1126 static u32 current_clientid
= 1;
1128 clp
->cl_clientid
.cl_boot
= boot_time
;
1129 clp
->cl_clientid
.cl_id
= current_clientid
++;
1132 static void gen_confirm(struct nfs4_client
*clp
)
1137 p
= (u32
*)clp
->cl_confirm
.data
;
1138 *p
++ = get_seconds();
1142 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1144 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1147 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1149 struct nfs4_stid
*s
;
1151 s
= find_stateid(cl
, t
);
1154 if (typemask
& s
->sc_type
)
1159 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1160 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1162 struct nfs4_client
*clp
;
1163 struct sockaddr
*sa
= svc_addr(rqstp
);
1166 clp
= alloc_client(name
);
1170 INIT_LIST_HEAD(&clp
->cl_sessions
);
1172 princ
= svc_gss_principal(rqstp
);
1174 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1175 if (clp
->cl_principal
== NULL
) {
1181 idr_init(&clp
->cl_stateids
);
1182 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1183 atomic_set(&clp
->cl_refcount
, 0);
1184 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1185 INIT_LIST_HEAD(&clp
->cl_idhash
);
1186 INIT_LIST_HEAD(&clp
->cl_strhash
);
1187 INIT_LIST_HEAD(&clp
->cl_openowners
);
1188 INIT_LIST_HEAD(&clp
->cl_delegations
);
1189 INIT_LIST_HEAD(&clp
->cl_lru
);
1190 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1191 spin_lock_init(&clp
->cl_lock
);
1192 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1193 clp
->cl_time
= get_seconds();
1194 clear_bit(0, &clp
->cl_cb_slot_busy
);
1195 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1196 copy_verf(clp
, verf
);
1197 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1198 clp
->cl_flavor
= rqstp
->rq_flavor
;
1199 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1201 clp
->cl_cb_session
= NULL
;
1206 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1208 unsigned int idhashval
;
1210 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1211 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1212 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1217 move_to_confirmed(struct nfs4_client
*clp
)
1219 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1220 unsigned int strhashval
;
1222 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1223 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1224 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1225 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1229 static struct nfs4_client
*
1230 find_confirmed_client(clientid_t
*clid
)
1232 struct nfs4_client
*clp
;
1233 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1235 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1236 if (same_clid(&clp
->cl_clientid
, clid
)) {
1244 static struct nfs4_client
*
1245 find_unconfirmed_client(clientid_t
*clid
)
1247 struct nfs4_client
*clp
;
1248 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1250 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1251 if (same_clid(&clp
->cl_clientid
, clid
))
1257 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1259 return clp
->cl_exchange_flags
!= 0;
1262 static struct nfs4_client
*
1263 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1265 struct nfs4_client
*clp
;
1267 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1268 if (same_name(clp
->cl_recdir
, dname
))
1274 static struct nfs4_client
*
1275 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1277 struct nfs4_client
*clp
;
1279 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1280 if (same_name(clp
->cl_recdir
, dname
))
1287 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1289 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1290 struct sockaddr
*sa
= svc_addr(rqstp
);
1291 u32 scopeid
= rpc_get_scope_id(sa
);
1292 unsigned short expected_family
;
1294 /* Currently, we only support tcp and tcp6 for the callback channel */
1295 if (se
->se_callback_netid_len
== 3 &&
1296 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1297 expected_family
= AF_INET
;
1298 else if (se
->se_callback_netid_len
== 4 &&
1299 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1300 expected_family
= AF_INET6
;
1304 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1305 se
->se_callback_addr_len
,
1306 (struct sockaddr
*)&conn
->cb_addr
,
1307 sizeof(conn
->cb_addr
));
1309 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1312 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1313 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1315 conn
->cb_prog
= se
->se_callback_prog
;
1316 conn
->cb_ident
= se
->se_callback_ident
;
1317 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1320 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1321 conn
->cb_addrlen
= 0;
1322 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1323 "will not receive delegations\n",
1324 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1330 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1333 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1335 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1338 dprintk("--> %s slot %p\n", __func__
, slot
);
1340 slot
->sl_opcnt
= resp
->opcnt
;
1341 slot
->sl_status
= resp
->cstate
.status
;
1343 if (nfsd4_not_cached(resp
)) {
1344 slot
->sl_datalen
= 0;
1347 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1348 base
= (char *)resp
->cstate
.datap
-
1349 (char *)resp
->xbuf
->head
[0].iov_base
;
1350 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1352 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1357 * Encode the replay sequence operation from the slot values.
1358 * If cachethis is FALSE encode the uncached rep error on the next
1359 * operation which sets resp->p and increments resp->opcnt for
1360 * nfs4svc_encode_compoundres.
1364 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1365 struct nfsd4_compoundres
*resp
)
1367 struct nfsd4_op
*op
;
1368 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1370 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1371 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1373 /* Encode the replayed sequence operation */
1374 op
= &args
->ops
[resp
->opcnt
- 1];
1375 nfsd4_encode_operation(resp
, op
);
1377 /* Return nfserr_retry_uncached_rep in next operation. */
1378 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1379 op
= &args
->ops
[resp
->opcnt
++];
1380 op
->status
= nfserr_retry_uncached_rep
;
1381 nfsd4_encode_operation(resp
, op
);
1387 * The sequence operation is not cached because we can use the slot and
1391 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1392 struct nfsd4_sequence
*seq
)
1394 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1397 dprintk("--> %s slot %p\n", __func__
, slot
);
1399 /* Either returns 0 or nfserr_retry_uncached */
1400 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1401 if (status
== nfserr_retry_uncached_rep
)
1404 /* The sequence operation has been encoded, cstate->datap set. */
1405 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1407 resp
->opcnt
= slot
->sl_opcnt
;
1408 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1409 status
= slot
->sl_status
;
1415 * Set the exchange_id flags returned by the server.
1418 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1420 /* pNFS is not supported */
1421 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1423 /* Referrals are supported, Migration is not. */
1424 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1426 /* set the wire flags to return to client. */
1427 clid
->flags
= new->cl_exchange_flags
;
1431 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1432 struct nfsd4_compound_state
*cstate
,
1433 struct nfsd4_exchange_id
*exid
)
1435 struct nfs4_client
*unconf
, *conf
, *new;
1437 unsigned int strhashval
;
1438 char dname
[HEXDIR_LEN
];
1439 char addr_str
[INET6_ADDRSTRLEN
];
1440 nfs4_verifier verf
= exid
->verifier
;
1441 struct sockaddr
*sa
= svc_addr(rqstp
);
1443 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1444 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1445 "ip_addr=%s flags %x, spa_how %d\n",
1446 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1447 addr_str
, exid
->flags
, exid
->spa_how
);
1449 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1450 return nfserr_inval
;
1452 /* Currently only support SP4_NONE */
1453 switch (exid
->spa_how
) {
1457 return nfserr_serverfault
;
1459 BUG(); /* checked by xdr code */
1461 return nfserr_serverfault
; /* no excuse :-/ */
1464 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1469 strhashval
= clientstr_hashval(dname
);
1474 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1476 if (!clp_used_exchangeid(conf
)) {
1477 status
= nfserr_clid_inuse
; /* XXX: ? */
1480 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1481 /* 18.35.4 case 8 */
1482 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1483 status
= nfserr_not_same
;
1486 /* Client reboot: destroy old state */
1487 expire_client(conf
);
1490 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1491 /* 18.35.4 case 9 */
1492 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1493 status
= nfserr_perm
;
1496 expire_client(conf
);
1500 * Set bit when the owner id and verifier map to an already
1501 * confirmed client id (18.35.3).
1503 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1506 * Falling into 18.35.4 case 2, possible router replay.
1507 * Leave confirmed record intact and return same result.
1509 copy_verf(conf
, &verf
);
1514 /* 18.35.4 case 7 */
1515 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1516 status
= nfserr_noent
;
1520 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1523 * Possible retry or client restart. Per 18.35.4 case 4,
1524 * a new unconfirmed record should be generated regardless
1525 * of whether any properties have changed.
1527 expire_client(unconf
);
1532 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1534 status
= nfserr_jukebox
;
1539 add_to_unconfirmed(new, strhashval
);
1541 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1542 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1545 nfsd4_set_ex_flags(new, exid
);
1547 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1548 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1552 nfs4_unlock_state();
1554 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1559 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1561 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1564 /* The slot is in use, and no response has been sent. */
1566 if (seqid
== slot_seqid
)
1567 return nfserr_jukebox
;
1569 return nfserr_seq_misordered
;
1572 if (likely(seqid
== slot_seqid
+ 1))
1575 if (seqid
== slot_seqid
)
1576 return nfserr_replay_cache
;
1578 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1580 /* Misordered replay or misordered new request */
1581 return nfserr_seq_misordered
;
1585 * Cache the create session result into the create session single DRC
1586 * slot cache by saving the xdr structure. sl_seqid has been set.
1587 * Do this for solo or embedded create session operations.
1590 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1591 struct nfsd4_clid_slot
*slot
, int nfserr
)
1593 slot
->sl_status
= nfserr
;
1594 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1598 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1599 struct nfsd4_clid_slot
*slot
)
1601 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1602 return slot
->sl_status
;
1605 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1606 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1607 1 + /* MIN tag is length with zero, only length */ \
1608 3 + /* version, opcount, opcode */ \
1609 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1610 /* seqid, slotID, slotID, cache */ \
1611 4 ) * sizeof(__be32))
1613 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1614 2 + /* verifier: AUTH_NULL, length 0 */\
1616 1 + /* MIN tag is length with zero, only length */ \
1617 3 + /* opcount, opcode, opstatus*/ \
1618 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1619 /* seqid, slotID, slotID, slotID, status */ \
1620 5 ) * sizeof(__be32))
1622 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1624 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1625 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1629 nfsd4_create_session(struct svc_rqst
*rqstp
,
1630 struct nfsd4_compound_state
*cstate
,
1631 struct nfsd4_create_session
*cr_ses
)
1633 struct sockaddr
*sa
= svc_addr(rqstp
);
1634 struct nfs4_client
*conf
, *unconf
;
1635 struct nfsd4_session
*new;
1636 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1637 bool confirm_me
= false;
1640 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1641 return nfserr_inval
;
1644 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1645 conf
= find_confirmed_client(&cr_ses
->clientid
);
1648 cs_slot
= &conf
->cl_cs_slot
;
1649 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1650 if (status
== nfserr_replay_cache
) {
1651 dprintk("Got a create_session replay! seqid= %d\n",
1653 /* Return the cached reply status */
1654 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1656 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1657 status
= nfserr_seq_misordered
;
1658 dprintk("Sequence misordered!\n");
1659 dprintk("Expected seqid= %d but got seqid= %d\n",
1660 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1663 } else if (unconf
) {
1664 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1665 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1666 status
= nfserr_clid_inuse
;
1670 cs_slot
= &unconf
->cl_cs_slot
;
1671 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1673 /* an unconfirmed replay returns misordered */
1674 status
= nfserr_seq_misordered
;
1681 status
= nfserr_stale_clientid
;
1686 * XXX: we should probably set this at creation time, and check
1687 * for consistent minorversion use throughout:
1689 conf
->cl_minorversion
= 1;
1691 * We do not support RDMA or persistent sessions
1693 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1694 cr_ses
->flags
&= ~SESSION4_RDMA
;
1696 status
= nfserr_toosmall
;
1697 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1700 status
= nfserr_jukebox
;
1701 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1705 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1706 NFS4_MAX_SESSIONID_LEN
);
1707 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1708 sizeof(struct nfsd4_channel_attrs
));
1709 cs_slot
->sl_seqid
++;
1710 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1712 /* cache solo and embedded create sessions under the state lock */
1713 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1715 move_to_confirmed(conf
);
1717 nfs4_unlock_state();
1718 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1722 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1724 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1725 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1727 return argp
->opcnt
== resp
->opcnt
;
1730 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1733 case NFS4_CDFC4_FORE
:
1734 case NFS4_CDFC4_BACK
:
1736 case NFS4_CDFC4_FORE_OR_BOTH
:
1737 case NFS4_CDFC4_BACK_OR_BOTH
:
1738 *dir
= NFS4_CDFC4_BOTH
;
1741 return nfserr_inval
;
1744 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1745 struct nfsd4_compound_state
*cstate
,
1746 struct nfsd4_bind_conn_to_session
*bcts
)
1750 if (!nfsd4_last_compound_op(rqstp
))
1751 return nfserr_not_only_op
;
1752 spin_lock(&client_lock
);
1753 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1754 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1755 * client_lock iself: */
1756 if (cstate
->session
) {
1757 nfsd4_get_session(cstate
->session
);
1758 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1760 spin_unlock(&client_lock
);
1761 if (!cstate
->session
)
1762 return nfserr_badsession
;
1764 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1766 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1770 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1774 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1778 nfsd4_destroy_session(struct svc_rqst
*r
,
1779 struct nfsd4_compound_state
*cstate
,
1780 struct nfsd4_destroy_session
*sessionid
)
1782 struct nfsd4_session
*ses
;
1783 u32 status
= nfserr_badsession
;
1786 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1787 * - Should we return nfserr_back_chan_busy if waiting for
1788 * callbacks on to-be-destroyed session?
1789 * - Do we need to clear any callback info from previous session?
1792 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1793 if (!nfsd4_last_compound_op(r
))
1794 return nfserr_not_only_op
;
1796 dump_sessionid(__func__
, &sessionid
->sessionid
);
1797 spin_lock(&client_lock
);
1798 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1800 spin_unlock(&client_lock
);
1804 unhash_session(ses
);
1805 spin_unlock(&client_lock
);
1808 nfsd4_probe_callback_sync(ses
->se_client
);
1809 nfs4_unlock_state();
1811 nfsd4_del_conns(ses
);
1813 nfsd4_put_session(ses
);
1816 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1820 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1822 struct nfsd4_conn
*c
;
1824 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1825 if (c
->cn_xprt
== xpt
) {
1832 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1834 struct nfs4_client
*clp
= ses
->se_client
;
1835 struct nfsd4_conn
*c
;
1838 spin_lock(&clp
->cl_lock
);
1839 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1841 spin_unlock(&clp
->cl_lock
);
1845 __nfsd4_hash_conn(new, ses
);
1846 spin_unlock(&clp
->cl_lock
);
1847 ret
= nfsd4_register_conn(new);
1849 /* oops; xprt is already down: */
1850 nfsd4_conn_lost(&new->cn_xpt_user
);
1854 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1856 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1858 return args
->opcnt
> session
->se_fchannel
.maxops
;
1861 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1862 struct nfsd4_session
*session
)
1864 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1866 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1870 nfsd4_sequence(struct svc_rqst
*rqstp
,
1871 struct nfsd4_compound_state
*cstate
,
1872 struct nfsd4_sequence
*seq
)
1874 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1875 struct nfsd4_session
*session
;
1876 struct nfsd4_slot
*slot
;
1877 struct nfsd4_conn
*conn
;
1880 if (resp
->opcnt
!= 1)
1881 return nfserr_sequence_pos
;
1884 * Will be either used or freed by nfsd4_sequence_check_conn
1887 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1889 return nfserr_jukebox
;
1891 spin_lock(&client_lock
);
1892 status
= nfserr_badsession
;
1893 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1897 status
= nfserr_too_many_ops
;
1898 if (nfsd4_session_too_many_ops(rqstp
, session
))
1901 status
= nfserr_req_too_big
;
1902 if (nfsd4_request_too_big(rqstp
, session
))
1905 status
= nfserr_badslot
;
1906 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1909 slot
= session
->se_slots
[seq
->slotid
];
1910 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1912 /* We do not negotiate the number of slots yet, so set the
1913 * maxslots to the session maxreqs which is used to encode
1914 * sr_highest_slotid and the sr_target_slot id to maxslots */
1915 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1917 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1918 if (status
== nfserr_replay_cache
) {
1919 cstate
->slot
= slot
;
1920 cstate
->session
= session
;
1921 /* Return the cached reply status and set cstate->status
1922 * for nfsd4_proc_compound processing */
1923 status
= nfsd4_replay_cache_entry(resp
, seq
);
1924 cstate
->status
= nfserr_replay_cache
;
1930 nfsd4_sequence_check_conn(conn
, session
);
1933 /* Success! bump slot seqid */
1934 slot
->sl_inuse
= true;
1935 slot
->sl_seqid
= seq
->seqid
;
1936 slot
->sl_cachethis
= seq
->cachethis
;
1938 cstate
->slot
= slot
;
1939 cstate
->session
= session
;
1942 /* Hold a session reference until done processing the compound. */
1943 if (cstate
->session
) {
1944 struct nfs4_client
*clp
= session
->se_client
;
1946 nfsd4_get_session(cstate
->session
);
1947 atomic_inc(&clp
->cl_refcount
);
1948 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1949 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1952 spin_unlock(&client_lock
);
1953 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1958 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1962 if (rc
->rca_one_fs
) {
1963 if (!cstate
->current_fh
.fh_dentry
)
1964 return nfserr_nofilehandle
;
1966 * We don't take advantage of the rca_one_fs case.
1967 * That's OK, it's optional, we can safely ignore it.
1973 status
= nfserr_complete_already
;
1974 if (cstate
->session
->se_client
->cl_firststate
)
1977 status
= nfserr_stale_clientid
;
1978 if (is_client_expired(cstate
->session
->se_client
))
1980 * The following error isn't really legal.
1981 * But we only get here if the client just explicitly
1982 * destroyed the client. Surely it no longer cares what
1983 * error it gets back on an operation for the dead
1989 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1991 nfs4_unlock_state();
1996 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1997 struct nfsd4_setclientid
*setclid
)
1999 struct xdr_netobj clname
= setclid
->se_name
;
2000 nfs4_verifier clverifier
= setclid
->se_verf
;
2001 unsigned int strhashval
;
2002 struct nfs4_client
*conf
, *unconf
, *new;
2004 char dname
[HEXDIR_LEN
];
2006 status
= nfs4_make_rec_clidname(dname
, &clname
);
2011 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2012 * We get here on a DRC miss.
2015 strhashval
= clientstr_hashval(dname
);
2018 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2020 /* RFC 3530 14.2.33 CASE 0: */
2021 status
= nfserr_clid_inuse
;
2022 if (clp_used_exchangeid(conf
))
2024 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2025 char addr_str
[INET6_ADDRSTRLEN
];
2026 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2028 dprintk("NFSD: setclientid: string in use by client "
2029 "at %s\n", addr_str
);
2034 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2035 * has a description of SETCLIENTID request processing consisting
2036 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2038 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2039 status
= nfserr_jukebox
;
2042 * RFC 3530 14.2.33 CASE 4:
2043 * placed first, because it is the normal case
2046 expire_client(unconf
);
2047 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2051 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2053 * RFC 3530 14.2.33 CASE 1:
2054 * probable callback update
2057 /* Note this is removing unconfirmed {*x***},
2058 * which is stronger than RFC recommended {vxc**}.
2059 * This has the advantage that there is at most
2060 * one {*x***} in either list at any time.
2062 expire_client(unconf
);
2064 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2067 copy_clid(new, conf
);
2068 } else if (!unconf
) {
2070 * RFC 3530 14.2.33 CASE 2:
2071 * probable client reboot; state will be removed if
2074 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2080 * RFC 3530 14.2.33 CASE 3:
2081 * probable client reboot; state will be removed if
2084 expire_client(unconf
);
2085 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2091 * XXX: we should probably set this at creation time, and check
2092 * for consistent minorversion use throughout:
2094 new->cl_minorversion
= 0;
2095 gen_callback(new, setclid
, rqstp
);
2096 add_to_unconfirmed(new, strhashval
);
2097 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2098 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2099 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2102 nfs4_unlock_state();
2108 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2109 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2110 * bullets, labeled as CASE1 - CASE4 below.
2113 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2114 struct nfsd4_compound_state
*cstate
,
2115 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2117 struct sockaddr
*sa
= svc_addr(rqstp
);
2118 struct nfs4_client
*conf
, *unconf
;
2119 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2120 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2123 if (STALE_CLIENTID(clid
))
2124 return nfserr_stale_clientid
;
2126 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2127 * We get here on a DRC miss.
2132 conf
= find_confirmed_client(clid
);
2133 unconf
= find_unconfirmed_client(clid
);
2135 status
= nfserr_clid_inuse
;
2136 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2138 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2142 * section 14.2.34 of RFC 3530 has a description of
2143 * SETCLIENTID_CONFIRM request processing consisting
2144 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2146 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2148 * RFC 3530 14.2.34 CASE 1:
2151 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2152 status
= nfserr_clid_inuse
;
2154 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2155 nfsd4_probe_callback(conf
);
2156 expire_client(unconf
);
2160 } else if (conf
&& !unconf
) {
2162 * RFC 3530 14.2.34 CASE 2:
2163 * probable retransmitted request; play it safe and
2166 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2167 status
= nfserr_clid_inuse
;
2170 } else if (!conf
&& unconf
2171 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2173 * RFC 3530 14.2.34 CASE 3:
2174 * Normal case; new or rebooted client:
2176 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2177 status
= nfserr_clid_inuse
;
2180 clientstr_hashval(unconf
->cl_recdir
);
2181 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2184 nfsd4_remove_clid_dir(conf
);
2185 expire_client(conf
);
2187 move_to_confirmed(unconf
);
2189 nfsd4_probe_callback(conf
);
2192 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2193 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2196 * RFC 3530 14.2.34 CASE 4:
2197 * Client probably hasn't noticed that we rebooted yet.
2199 status
= nfserr_stale_clientid
;
2201 /* check that we have hit one of the cases...*/
2202 status
= nfserr_clid_inuse
;
2205 nfs4_unlock_state();
2209 static struct nfs4_file
*nfsd4_alloc_file(void)
2211 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2214 /* OPEN Share state helper functions */
2215 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2217 unsigned int hashval
= file_hashval(ino
);
2219 atomic_set(&fp
->fi_ref
, 1);
2220 INIT_LIST_HEAD(&fp
->fi_hash
);
2221 INIT_LIST_HEAD(&fp
->fi_stateids
);
2222 INIT_LIST_HEAD(&fp
->fi_delegations
);
2223 fp
->fi_inode
= igrab(ino
);
2224 fp
->fi_had_conflict
= false;
2225 fp
->fi_lease
= NULL
;
2226 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2227 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2228 spin_lock(&recall_lock
);
2229 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2230 spin_unlock(&recall_lock
);
2234 nfsd4_free_slab(struct kmem_cache
**slab
)
2238 kmem_cache_destroy(*slab
);
2243 nfsd4_free_slabs(void)
2245 nfsd4_free_slab(&openowner_slab
);
2246 nfsd4_free_slab(&lockowner_slab
);
2247 nfsd4_free_slab(&file_slab
);
2248 nfsd4_free_slab(&stateid_slab
);
2249 nfsd4_free_slab(&deleg_slab
);
2253 nfsd4_init_slabs(void)
2255 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2256 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2257 if (openowner_slab
== NULL
)
2259 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2260 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2261 if (lockowner_slab
== NULL
)
2263 file_slab
= kmem_cache_create("nfsd4_files",
2264 sizeof(struct nfs4_file
), 0, 0, NULL
);
2265 if (file_slab
== NULL
)
2267 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2268 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2269 if (stateid_slab
== NULL
)
2271 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2272 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2273 if (deleg_slab
== NULL
)
2278 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2282 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2284 kfree(oo
->oo_owner
.so_owner
.data
);
2285 kmem_cache_free(openowner_slab
, oo
);
2288 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2290 kfree(lo
->lo_owner
.so_owner
.data
);
2291 kmem_cache_free(lockowner_slab
, lo
);
2294 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2296 rp
->rp_status
= nfserr_serverfault
;
2298 rp
->rp_buf
= rp
->rp_ibuf
;
2301 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2303 struct nfs4_stateowner
*sop
;
2305 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2309 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2310 if (!sop
->so_owner
.data
) {
2311 kmem_cache_free(slab
, sop
);
2314 sop
->so_owner
.len
= owner
->len
;
2316 INIT_LIST_HEAD(&sop
->so_stateids
);
2317 sop
->so_client
= clp
;
2318 init_nfs4_replay(&sop
->so_replay
);
2322 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2324 list_add(&oo
->oo_owner
.so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2325 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2328 static struct nfs4_openowner
*
2329 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2330 struct nfs4_openowner
*oo
;
2332 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2335 oo
->oo_owner
.so_is_open_owner
= 1;
2336 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2337 oo
->oo_flags
= NFS4_OO_NEW
;
2339 oo
->oo_last_closed_stid
= NULL
;
2340 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2341 hash_openowner(oo
, clp
, strhashval
);
2345 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2346 struct nfs4_openowner
*oo
= open
->op_openowner
;
2347 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2349 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2350 INIT_LIST_HEAD(&stp
->st_lockowners
);
2351 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2352 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2353 stp
->st_stateowner
= &oo
->oo_owner
;
2356 stp
->st_access_bmap
= 0;
2357 stp
->st_deny_bmap
= 0;
2358 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
2359 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2360 stp
->st_openstp
= NULL
;
2364 move_to_close_lru(struct nfs4_openowner
*oo
)
2366 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2368 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2369 oo
->oo_time
= get_seconds();
2373 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2376 return (sop
->so_owner
.len
== owner
->len
) &&
2377 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2378 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2381 static struct nfs4_openowner
*
2382 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2384 struct nfs4_stateowner
*so
;
2385 struct nfs4_openowner
*oo
;
2387 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2388 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2390 renew_client(oo
->oo_owner
.so_client
);
2397 /* search file_hashtbl[] for file */
2398 static struct nfs4_file
*
2399 find_file(struct inode
*ino
)
2401 unsigned int hashval
= file_hashval(ino
);
2402 struct nfs4_file
*fp
;
2404 spin_lock(&recall_lock
);
2405 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2406 if (fp
->fi_inode
== ino
) {
2408 spin_unlock(&recall_lock
);
2412 spin_unlock(&recall_lock
);
2417 * Called to check deny when READ with all zero stateid or
2418 * WRITE with all zero or all one stateid
2421 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2423 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2424 struct nfs4_file
*fp
;
2425 struct nfs4_ol_stateid
*stp
;
2428 dprintk("NFSD: nfs4_share_conflict\n");
2430 fp
= find_file(ino
);
2433 ret
= nfserr_locked
;
2434 /* Search for conflicting share reservations */
2435 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2436 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2437 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2446 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2448 /* We're assuming the state code never drops its reference
2449 * without first removing the lease. Since we're in this lease
2450 * callback (and since the lease code is serialized by the kernel
2451 * lock) we know the server hasn't removed the lease yet, we know
2452 * it's safe to take a reference: */
2453 atomic_inc(&dp
->dl_count
);
2455 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2457 /* only place dl_time is set. protected by lock_flocks*/
2458 dp
->dl_time
= get_seconds();
2460 nfsd4_cb_recall(dp
);
2463 /* Called from break_lease() with lock_flocks() held. */
2464 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2466 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2467 struct nfs4_delegation
*dp
;
2470 /* We assume break_lease is only called once per lease: */
2471 BUG_ON(fp
->fi_had_conflict
);
2473 * We don't want the locks code to timeout the lease for us;
2474 * we'll remove it ourself if a delegation isn't returned
2477 fl
->fl_break_time
= 0;
2479 spin_lock(&recall_lock
);
2480 fp
->fi_had_conflict
= true;
2481 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2482 nfsd_break_one_deleg(dp
);
2483 spin_unlock(&recall_lock
);
2487 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2490 return lease_modify(onlist
, arg
);
2495 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2496 .lm_break
= nfsd_break_deleg_cb
,
2497 .lm_change
= nfsd_change_deleg_cb
,
2500 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2502 if (nfsd4_has_session(cstate
))
2504 if (seqid
== so
->so_seqid
- 1)
2505 return nfserr_replay_me
;
2506 if (seqid
== so
->so_seqid
)
2508 return nfserr_bad_seqid
;
2512 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2513 struct nfsd4_open
*open
)
2515 clientid_t
*clientid
= &open
->op_clientid
;
2516 struct nfs4_client
*clp
= NULL
;
2517 unsigned int strhashval
;
2518 struct nfs4_openowner
*oo
= NULL
;
2521 if (STALE_CLIENTID(&open
->op_clientid
))
2522 return nfserr_stale_clientid
;
2524 * In case we need it later, after we've already created the
2525 * file and don't want to risk a further failure:
2527 open
->op_file
= nfsd4_alloc_file();
2528 if (open
->op_file
== NULL
)
2529 return nfserr_jukebox
;
2531 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2532 oo
= find_openstateowner_str(strhashval
, open
);
2533 open
->op_openowner
= oo
;
2535 clp
= find_confirmed_client(clientid
);
2537 return nfserr_expired
;
2540 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2541 /* Replace unconfirmed owners without checking for replay. */
2542 clp
= oo
->oo_owner
.so_client
;
2543 release_openowner(oo
);
2544 open
->op_openowner
= NULL
;
2547 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2550 clp
= oo
->oo_owner
.so_client
;
2553 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2555 return nfserr_jukebox
;
2556 open
->op_openowner
= oo
;
2558 open
->op_stp
= nfs4_alloc_stateid(clp
);
2560 return nfserr_jukebox
;
2564 static inline __be32
2565 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2567 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2568 return nfserr_openmode
;
2573 static int share_access_to_flags(u32 share_access
)
2575 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2577 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2580 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2582 struct nfs4_stid
*ret
;
2584 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2587 return delegstateid(ret
);
2590 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2592 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2593 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2597 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2598 struct nfs4_delegation
**dp
)
2601 __be32 status
= nfserr_bad_stateid
;
2603 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2606 flags
= share_access_to_flags(open
->op_share_access
);
2607 status
= nfs4_check_delegmode(*dp
, flags
);
2611 if (!nfsd4_is_deleg_cur(open
))
2615 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2620 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2622 struct nfs4_ol_stateid
*local
;
2623 struct nfs4_openowner
*oo
= open
->op_openowner
;
2625 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2626 /* ignore lock owners */
2627 if (local
->st_stateowner
->so_is_open_owner
== 0)
2629 /* remember if we have seen this open owner */
2630 if (local
->st_stateowner
== &oo
->oo_owner
)
2632 /* check for conflicting share reservations */
2633 if (!test_share(local
, open
))
2634 return nfserr_share_denied
;
2639 static void nfs4_free_stateid(struct nfs4_ol_stateid
*s
)
2641 kmem_cache_free(stateid_slab
, s
);
2644 static inline int nfs4_access_to_access(u32 nfs4_access
)
2648 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2649 flags
|= NFSD_MAY_READ
;
2650 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2651 flags
|= NFSD_MAY_WRITE
;
2655 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2656 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2659 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2660 int access
= nfs4_access_to_access(open
->op_share_access
);
2662 if (!fp
->fi_fds
[oflag
]) {
2663 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2664 &fp
->fi_fds
[oflag
]);
2668 nfs4_file_get_access(fp
, oflag
);
2673 static inline __be32
2674 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2675 struct nfsd4_open
*open
)
2677 struct iattr iattr
= {
2678 .ia_valid
= ATTR_SIZE
,
2681 if (!open
->op_truncate
)
2683 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2684 return nfserr_inval
;
2685 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2689 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
)
2691 u32 op_share_access
= open
->op_share_access
;
2695 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2697 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2701 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2704 int oflag
= nfs4_access_to_omode(op_share_access
);
2705 nfs4_file_put_access(fp
, oflag
);
2709 /* remember the open */
2710 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2711 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2718 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2720 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2721 open
->op_openowner
->oo_owner
.so_client
->cl_firststate
= 1;
2724 /* Should we give out recallable state?: */
2725 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2727 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2730 * In the sessions case, since we don't have to establish a
2731 * separate connection for callbacks, we assume it's OK
2732 * until we hear otherwise:
2734 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2737 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2739 struct file_lock
*fl
;
2741 fl
= locks_alloc_lock();
2744 locks_init_lock(fl
);
2745 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2746 fl
->fl_flags
= FL_LEASE
;
2747 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2748 fl
->fl_end
= OFFSET_MAX
;
2749 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2750 fl
->fl_pid
= current
->tgid
;
2754 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2756 struct nfs4_file
*fp
= dp
->dl_file
;
2757 struct file_lock
*fl
;
2760 fl
= nfs4_alloc_init_lease(dp
, flag
);
2763 fl
->fl_file
= find_readable_file(fp
);
2764 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2765 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2767 list_del_init(&dp
->dl_perclnt
);
2768 locks_free_lock(fl
);
2772 fp
->fi_deleg_file
= fl
->fl_file
;
2773 get_file(fp
->fi_deleg_file
);
2774 atomic_set(&fp
->fi_delegees
, 1);
2775 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2779 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2781 struct nfs4_file
*fp
= dp
->dl_file
;
2784 return nfs4_setlease(dp
, flag
);
2785 spin_lock(&recall_lock
);
2786 if (fp
->fi_had_conflict
) {
2787 spin_unlock(&recall_lock
);
2790 atomic_inc(&fp
->fi_delegees
);
2791 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2792 spin_unlock(&recall_lock
);
2793 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2798 * Attempt to hand out a delegation.
2801 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2803 struct nfs4_delegation
*dp
;
2804 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2806 int status
, flag
= 0;
2808 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2809 flag
= NFS4_OPEN_DELEGATE_NONE
;
2810 open
->op_recall
= 0;
2811 switch (open
->op_claim_type
) {
2812 case NFS4_OPEN_CLAIM_PREVIOUS
:
2814 open
->op_recall
= 1;
2815 flag
= open
->op_delegate_type
;
2816 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2819 case NFS4_OPEN_CLAIM_NULL
:
2820 /* Let's not give out any delegations till everyone's
2821 * had the chance to reclaim theirs.... */
2822 if (locks_in_grace())
2824 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2826 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2827 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2829 flag
= NFS4_OPEN_DELEGATE_READ
;
2835 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2838 status
= nfs4_set_delegation(dp
, flag
);
2842 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2844 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2845 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2847 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2848 && flag
== NFS4_OPEN_DELEGATE_NONE
2849 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2850 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2851 open
->op_delegate_type
= flag
;
2854 nfs4_put_delegation(dp
);
2856 flag
= NFS4_OPEN_DELEGATE_NONE
;
2861 * called with nfs4_lock_state() held.
2864 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2866 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2867 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
2868 struct nfs4_file
*fp
= NULL
;
2869 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2870 struct nfs4_ol_stateid
*stp
= NULL
;
2871 struct nfs4_delegation
*dp
= NULL
;
2875 * Lookup file; if found, lookup stateid and check open request,
2876 * and check for delegations in the process of being recalled.
2877 * If not found, create the nfs4_file struct
2879 fp
= find_file(ino
);
2881 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2883 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
2887 status
= nfserr_bad_stateid
;
2888 if (nfsd4_is_deleg_cur(open
))
2890 status
= nfserr_jukebox
;
2892 open
->op_file
= NULL
;
2893 nfsd4_init_file(fp
, ino
);
2897 * OPEN the file, or upgrade an existing OPEN.
2898 * If truncate fails, the OPEN fails.
2901 /* Stateid was found, this is an OPEN upgrade */
2902 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2906 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
2910 open
->op_stp
= NULL
;
2911 init_open_stateid(stp
, fp
, open
);
2912 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2914 release_open_stateid(stp
);
2918 update_stateid(&stp
->st_stid
.sc_stateid
);
2919 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
2921 if (nfsd4_has_session(&resp
->cstate
))
2922 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2925 * Attempt to hand out a delegation. No error return, because the
2926 * OPEN succeeds even if we fail.
2928 nfs4_open_delegation(current_fh
, open
, stp
);
2932 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2933 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
2937 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2938 nfs4_set_claim_prev(open
);
2940 * To finish the open response, we just need to set the rflags.
2942 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2943 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
2944 !nfsd4_has_session(&resp
->cstate
))
2945 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2950 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
2952 if (open
->op_openowner
) {
2953 struct nfs4_openowner
*oo
= open
->op_openowner
;
2955 if (!list_empty(&oo
->oo_owner
.so_stateids
))
2956 list_del_init(&oo
->oo_close_lru
);
2957 if (oo
->oo_flags
& NFS4_OO_NEW
) {
2959 release_openowner(oo
);
2960 open
->op_openowner
= NULL
;
2962 oo
->oo_flags
&= ~NFS4_OO_NEW
;
2966 nfsd4_free_file(open
->op_file
);
2968 nfs4_free_stateid(open
->op_stp
);
2972 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2975 struct nfs4_client
*clp
;
2979 dprintk("process_renew(%08x/%08x): starting\n",
2980 clid
->cl_boot
, clid
->cl_id
);
2981 status
= nfserr_stale_clientid
;
2982 if (STALE_CLIENTID(clid
))
2984 clp
= find_confirmed_client(clid
);
2985 status
= nfserr_expired
;
2987 /* We assume the client took too long to RENEW. */
2988 dprintk("nfsd4_renew: clientid not found!\n");
2991 status
= nfserr_cb_path_down
;
2992 if (!list_empty(&clp
->cl_delegations
)
2993 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
2997 nfs4_unlock_state();
3001 static struct lock_manager nfsd4_manager
= {
3005 nfsd4_end_grace(void)
3007 dprintk("NFSD: end of grace period\n");
3008 nfsd4_recdir_purge_old();
3009 locks_end_grace(&nfsd4_manager
);
3011 * Now that every NFSv4 client has had the chance to recover and
3012 * to see the (possibly new, possibly shorter) lease time, we
3013 * can safely set the next grace time to the current lease time:
3015 nfsd4_grace
= nfsd4_lease
;
3019 nfs4_laundromat(void)
3021 struct nfs4_client
*clp
;
3022 struct nfs4_openowner
*oo
;
3023 struct nfs4_delegation
*dp
;
3024 struct list_head
*pos
, *next
, reaplist
;
3025 time_t cutoff
= get_seconds() - nfsd4_lease
;
3026 time_t t
, clientid_val
= nfsd4_lease
;
3027 time_t u
, test_val
= nfsd4_lease
;
3031 dprintk("NFSD: laundromat service - starting\n");
3032 if (locks_in_grace())
3034 INIT_LIST_HEAD(&reaplist
);
3035 spin_lock(&client_lock
);
3036 list_for_each_safe(pos
, next
, &client_lru
) {
3037 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3038 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3039 t
= clp
->cl_time
- cutoff
;
3040 if (clientid_val
> t
)
3044 if (atomic_read(&clp
->cl_refcount
)) {
3045 dprintk("NFSD: client in use (clientid %08x)\n",
3046 clp
->cl_clientid
.cl_id
);
3049 unhash_client_locked(clp
);
3050 list_add(&clp
->cl_lru
, &reaplist
);
3052 spin_unlock(&client_lock
);
3053 list_for_each_safe(pos
, next
, &reaplist
) {
3054 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3055 dprintk("NFSD: purging unused client (clientid %08x)\n",
3056 clp
->cl_clientid
.cl_id
);
3057 nfsd4_remove_clid_dir(clp
);
3060 spin_lock(&recall_lock
);
3061 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3062 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3063 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3064 u
= dp
->dl_time
- cutoff
;
3069 list_move(&dp
->dl_recall_lru
, &reaplist
);
3071 spin_unlock(&recall_lock
);
3072 list_for_each_safe(pos
, next
, &reaplist
) {
3073 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3074 list_del_init(&dp
->dl_recall_lru
);
3075 unhash_delegation(dp
);
3077 test_val
= nfsd4_lease
;
3078 list_for_each_safe(pos
, next
, &close_lru
) {
3079 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3080 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3081 u
= oo
->oo_time
- cutoff
;
3086 release_openowner(oo
);
3088 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3089 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3090 nfs4_unlock_state();
3091 return clientid_val
;
3094 static struct workqueue_struct
*laundry_wq
;
3095 static void laundromat_main(struct work_struct
*);
3096 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3099 laundromat_main(struct work_struct
*not_used
)
3103 t
= nfs4_laundromat();
3104 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3105 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3108 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3110 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3111 return nfserr_bad_stateid
;
3116 STALE_STATEID(stateid_t
*stateid
)
3118 if (stateid
->si_opaque
.so_clid
.cl_boot
== boot_time
)
3120 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3121 STATEID_VAL(stateid
));
3126 access_permit_read(unsigned long access_bmap
)
3128 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3129 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3130 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3134 access_permit_write(unsigned long access_bmap
)
3136 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3137 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3141 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3143 __be32 status
= nfserr_openmode
;
3145 /* For lock stateid's, we test the parent open, not the lock: */
3146 if (stp
->st_openstp
)
3147 stp
= stp
->st_openstp
;
3148 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3150 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3157 static inline __be32
3158 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3160 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3162 else if (locks_in_grace()) {
3163 /* Answer in remaining cases depends on existence of
3164 * conflicting state; so we must wait out the grace period. */
3165 return nfserr_grace
;
3166 } else if (flags
& WR_STATE
)
3167 return nfs4_share_conflict(current_fh
,
3168 NFS4_SHARE_DENY_WRITE
);
3169 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3170 return nfs4_share_conflict(current_fh
,
3171 NFS4_SHARE_DENY_READ
);
3175 * Allow READ/WRITE during grace period on recovered state only for files
3176 * that are not able to provide mandatory locking.
3179 grace_disallows_io(struct inode
*inode
)
3181 return locks_in_grace() && mandatory_lock(inode
);
3184 /* Returns true iff a is later than b: */
3185 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3187 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3190 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3193 * When sessions are used the stateid generation number is ignored
3196 if (has_session
&& in
->si_generation
== 0)
3199 if (in
->si_generation
== ref
->si_generation
)
3202 /* If the client sends us a stateid from the future, it's buggy: */
3203 if (stateid_generation_after(in
, ref
))
3204 return nfserr_bad_stateid
;
3206 * However, we could see a stateid from the past, even from a
3207 * non-buggy client. For example, if the client sends a lock
3208 * while some IO is outstanding, the lock may bump si_generation
3209 * while the IO is still in flight. The client could avoid that
3210 * situation by waiting for responses on all the IO requests,
3211 * but better performance may result in retrying IO that
3212 * receives an old_stateid error if requests are rarely
3213 * reordered in flight:
3215 return nfserr_old_stateid
;
3218 __be32
nfs4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3220 struct nfs4_stid
*s
;
3221 struct nfs4_ol_stateid
*ols
;
3224 if (STALE_STATEID(stateid
))
3225 return nfserr_stale_stateid
;
3227 s
= find_stateid(cl
, stateid
);
3229 return nfserr_stale_stateid
;
3230 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3233 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3235 ols
= openlockstateid(s
);
3236 if (ols
->st_stateowner
->so_is_open_owner
3237 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3238 return nfserr_bad_stateid
;
3242 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
)
3244 struct nfs4_client
*cl
;
3246 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3247 return nfserr_bad_stateid
;
3248 if (STALE_STATEID(stateid
))
3249 return nfserr_stale_stateid
;
3250 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
);
3252 return nfserr_expired
;
3253 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3255 return nfserr_bad_stateid
;
3261 * Checks for stateid operations
3264 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3265 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3267 struct nfs4_stid
*s
;
3268 struct nfs4_ol_stateid
*stp
= NULL
;
3269 struct nfs4_delegation
*dp
= NULL
;
3270 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3271 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3277 if (grace_disallows_io(ino
))
3278 return nfserr_grace
;
3280 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3281 return check_special_stateids(current_fh
, stateid
, flags
);
3283 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
);
3286 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3289 switch (s
->sc_type
) {
3290 case NFS4_DELEG_STID
:
3291 dp
= delegstateid(s
);
3292 status
= nfs4_check_delegmode(dp
, flags
);
3296 *filpp
= dp
->dl_file
->fi_deleg_file
;
3300 case NFS4_OPEN_STID
:
3301 case NFS4_LOCK_STID
:
3302 stp
= openlockstateid(s
);
3303 status
= nfs4_check_fh(current_fh
, stp
);
3306 if (stp
->st_stateowner
->so_is_open_owner
3307 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3309 status
= nfs4_check_openmode(stp
, flags
);
3313 if (flags
& RD_STATE
)
3314 *filpp
= find_readable_file(stp
->st_file
);
3316 *filpp
= find_writeable_file(stp
->st_file
);
3320 return nfserr_bad_stateid
;
3328 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3330 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3331 return nfserr_locks_held
;
3332 release_lock_stateid(stp
);
3337 * Test if the stateid is valid
3340 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3341 struct nfsd4_test_stateid
*test_stateid
)
3343 /* real work is done during encoding */
3348 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3349 struct nfsd4_free_stateid
*free_stateid
)
3351 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3352 struct nfs4_stid
*s
;
3353 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3354 __be32 ret
= nfserr_bad_stateid
;
3357 s
= find_stateid(cl
, stateid
);
3360 switch (s
->sc_type
) {
3361 case NFS4_DELEG_STID
:
3362 ret
= nfserr_locks_held
;
3364 case NFS4_OPEN_STID
:
3365 case NFS4_LOCK_STID
:
3366 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3369 if (s
->sc_type
== NFS4_LOCK_STID
)
3370 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3372 ret
= nfserr_locks_held
;
3375 ret
= nfserr_bad_stateid
;
3378 nfs4_unlock_state();
3385 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3386 RD_STATE
: WR_STATE
;
3389 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3391 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3392 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3395 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3398 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3400 * "Closed" stateid's exist *only* to return
3401 * nfserr_replay_me from the previous step.
3403 return nfserr_bad_stateid
;
3404 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3407 return nfs4_check_fh(current_fh
, stp
);
3411 * Checks for sequence id mutating operations.
3414 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3415 stateid_t
*stateid
, char typemask
,
3416 struct nfs4_ol_stateid
**stpp
)
3419 struct nfs4_stid
*s
;
3421 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3422 seqid
, STATEID_VAL(stateid
));
3425 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
);
3428 *stpp
= openlockstateid(s
);
3429 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3431 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3434 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3437 struct nfs4_openowner
*oo
;
3439 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3440 NFS4_OPEN_STID
, stpp
);
3443 oo
= openowner((*stpp
)->st_stateowner
);
3444 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3445 return nfserr_bad_stateid
;
3450 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3451 struct nfsd4_open_confirm
*oc
)
3454 struct nfs4_openowner
*oo
;
3455 struct nfs4_ol_stateid
*stp
;
3457 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3458 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3459 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3461 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3467 status
= nfs4_preprocess_seqid_op(cstate
,
3468 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3469 NFS4_OPEN_STID
, &stp
);
3472 oo
= openowner(stp
->st_stateowner
);
3473 status
= nfserr_bad_stateid
;
3474 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3476 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3477 update_stateid(&stp
->st_stid
.sc_stateid
);
3478 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3479 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3480 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3482 nfsd4_create_clid_dir(oo
->oo_owner
.so_client
);
3485 if (!cstate
->replay_owner
)
3486 nfs4_unlock_state();
3490 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3492 if (!test_bit(access
, &stp
->st_access_bmap
))
3494 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3495 __clear_bit(access
, &stp
->st_access_bmap
);
3498 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3500 switch (to_access
) {
3501 case NFS4_SHARE_ACCESS_READ
:
3502 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3503 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3505 case NFS4_SHARE_ACCESS_WRITE
:
3506 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3507 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3509 case NFS4_SHARE_ACCESS_BOTH
:
3517 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3520 for (i
= 0; i
< 4; i
++) {
3521 if ((i
& deny
) != i
)
3522 __clear_bit(i
, bmap
);
3527 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3528 struct nfsd4_compound_state
*cstate
,
3529 struct nfsd4_open_downgrade
*od
)
3532 struct nfs4_ol_stateid
*stp
;
3534 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3535 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3536 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3538 /* We don't yet support WANT bits: */
3539 od
->od_share_access
&= NFS4_SHARE_ACCESS_MASK
;
3542 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3543 &od
->od_stateid
, &stp
);
3546 status
= nfserr_inval
;
3547 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3548 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3549 stp
->st_access_bmap
, od
->od_share_access
);
3552 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3553 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3554 stp
->st_deny_bmap
, od
->od_share_deny
);
3557 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3559 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3561 update_stateid(&stp
->st_stid
.sc_stateid
);
3562 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3565 if (!cstate
->replay_owner
)
3566 nfs4_unlock_state();
3570 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3572 struct nfs4_openowner
*oo
;
3573 struct nfs4_ol_stateid
*s
;
3575 if (!so
->so_is_open_owner
)
3578 s
= oo
->oo_last_closed_stid
;
3581 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3582 /* Release the last_closed_stid on the next seqid bump: */
3583 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3586 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3587 release_last_closed_stateid(oo
);
3590 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3592 unhash_open_stateid(s
);
3593 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3597 * nfs4_unlock_state() called after encode
3600 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3601 struct nfsd4_close
*close
)
3604 struct nfs4_openowner
*oo
;
3605 struct nfs4_ol_stateid
*stp
;
3607 dprintk("NFSD: nfsd4_close on file %.*s\n",
3608 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3609 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3612 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3614 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3618 oo
= openowner(stp
->st_stateowner
);
3620 update_stateid(&stp
->st_stid
.sc_stateid
);
3621 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3623 nfsd4_close_open_stateid(stp
);
3624 oo
->oo_last_closed_stid
= stp
;
3626 /* place unused nfs4_stateowners on so_close_lru list to be
3627 * released by the laundromat service after the lease period
3628 * to enable us to handle CLOSE replay
3630 if (list_empty(&oo
->oo_owner
.so_stateids
))
3631 move_to_close_lru(oo
);
3633 if (!cstate
->replay_owner
)
3634 nfs4_unlock_state();
3639 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3640 struct nfsd4_delegreturn
*dr
)
3642 struct nfs4_delegation
*dp
;
3643 stateid_t
*stateid
= &dr
->dr_stateid
;
3644 struct nfs4_stid
*s
;
3645 struct inode
*inode
;
3648 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3650 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3653 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
);
3656 dp
= delegstateid(s
);
3657 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3661 unhash_delegation(dp
);
3663 nfs4_unlock_state();
3670 * Lock owner state (byte-range locks)
3672 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3673 #define LOCK_HASH_BITS 8
3674 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3675 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3678 end_offset(u64 start
, u64 len
)
3683 return end
>= start
? end
: NFS4_MAX_UINT64
;
3686 /* last octet in a range */
3688 last_byte_offset(u64 start
, u64 len
)
3694 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3697 static inline unsigned int
3698 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3699 struct xdr_netobj
*ownername
)
3701 return (file_hashval(inode
) + cl_id
3702 + opaque_hashval(ownername
->data
, ownername
->len
))
3706 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3709 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3710 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3711 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3712 * locking, this prevents us from being completely protocol-compliant. The
3713 * real solution to this problem is to start using unsigned file offsets in
3714 * the VFS, but this is a very deep change!
3717 nfs4_transform_lock_offset(struct file_lock
*lock
)
3719 if (lock
->fl_start
< 0)
3720 lock
->fl_start
= OFFSET_MAX
;
3721 if (lock
->fl_end
< 0)
3722 lock
->fl_end
= OFFSET_MAX
;
3725 /* Hack!: For now, we're defining this just so we can use a pointer to it
3726 * as a unique cookie to identify our (NFSv4's) posix locks. */
3727 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3731 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3733 struct nfs4_lockowner
*lo
;
3735 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3736 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3737 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3738 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3739 if (!deny
->ld_owner
.data
)
3740 /* We just don't care that much */
3742 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3743 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3746 deny
->ld_owner
.len
= 0;
3747 deny
->ld_owner
.data
= NULL
;
3748 deny
->ld_clientid
.cl_boot
= 0;
3749 deny
->ld_clientid
.cl_id
= 0;
3751 deny
->ld_start
= fl
->fl_start
;
3752 deny
->ld_length
= NFS4_MAX_UINT64
;
3753 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3754 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3755 deny
->ld_type
= NFS4_READ_LT
;
3756 if (fl
->fl_type
!= F_RDLCK
)
3757 deny
->ld_type
= NFS4_WRITE_LT
;
3760 static struct nfs4_lockowner
*
3761 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3762 struct xdr_netobj
*owner
)
3764 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3765 struct nfs4_stateowner
*op
;
3767 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3768 if (same_owner_str(op
, owner
, clid
))
3769 return lockowner(op
);
3774 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3776 list_add(&lo
->lo_owner
.so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3777 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3781 * Alloc a lock owner structure.
3782 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3785 * strhashval = lock_ownerstr_hashval
3788 static struct nfs4_lockowner
*
3789 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3790 struct nfs4_lockowner
*lo
;
3792 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3795 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3796 lo
->lo_owner
.so_is_open_owner
= 0;
3797 /* It is the openowner seqid that will be incremented in encode in the
3798 * case of new lockowners; so increment the lock seqid manually: */
3799 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3800 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3804 static struct nfs4_ol_stateid
*
3805 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3807 struct nfs4_ol_stateid
*stp
;
3808 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3810 stp
= nfs4_alloc_stateid(clp
);
3813 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3814 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3815 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3816 stp
->st_stateowner
= &lo
->lo_owner
;
3819 stp
->st_access_bmap
= 0;
3820 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3821 stp
->st_openstp
= open_stp
;
3826 check_lock_length(u64 offset
, u64 length
)
3828 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3829 LOFF_OVERFLOW(offset
, length
)));
3832 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
3834 struct nfs4_file
*fp
= lock_stp
->st_file
;
3835 int oflag
= nfs4_access_to_omode(access
);
3837 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3839 nfs4_file_get_access(fp
, oflag
);
3840 __set_bit(access
, &lock_stp
->st_access_bmap
);
3847 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3848 struct nfsd4_lock
*lock
)
3850 struct nfs4_openowner
*open_sop
= NULL
;
3851 struct nfs4_lockowner
*lock_sop
= NULL
;
3852 struct nfs4_ol_stateid
*lock_stp
;
3853 struct nfs4_file
*fp
;
3854 struct file
*filp
= NULL
;
3855 struct file_lock file_lock
;
3856 struct file_lock conflock
;
3858 unsigned int strhashval
;
3862 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3863 (long long) lock
->lk_offset
,
3864 (long long) lock
->lk_length
);
3866 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3867 return nfserr_inval
;
3869 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3870 S_IFREG
, NFSD_MAY_LOCK
))) {
3871 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3877 if (lock
->lk_is_new
) {
3879 * Client indicates that this is a new lockowner.
3880 * Use open owner and open stateid to create lock owner and
3883 struct nfs4_ol_stateid
*open_stp
= NULL
;
3885 status
= nfserr_stale_clientid
;
3886 if (!nfsd4_has_session(cstate
) &&
3887 STALE_CLIENTID(&lock
->lk_new_clientid
))
3890 /* validate and update open stateid and open seqid */
3891 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
3892 lock
->lk_new_open_seqid
,
3893 &lock
->lk_new_open_stateid
,
3897 open_sop
= openowner(open_stp
->st_stateowner
);
3898 status
= nfserr_bad_stateid
;
3899 if (!nfsd4_has_session(cstate
) &&
3900 !same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
3901 &lock
->v
.new.clientid
))
3903 /* create lockowner and lock stateid */
3904 fp
= open_stp
->st_file
;
3905 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3906 open_sop
->oo_owner
.so_client
->cl_clientid
.cl_id
,
3907 &lock
->v
.new.owner
);
3908 /* XXX: Do we need to check for duplicate stateowners on
3909 * the same file, or should they just be allowed (and
3910 * create new stateids)? */
3911 status
= nfserr_jukebox
;
3912 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3913 open_sop
->oo_owner
.so_client
, open_stp
, lock
);
3914 if (lock_sop
== NULL
)
3916 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3917 if (lock_stp
== NULL
)
3920 /* lock (lock owner + lock stateid) already exists */
3921 status
= nfs4_preprocess_seqid_op(cstate
,
3922 lock
->lk_old_lock_seqid
,
3923 &lock
->lk_old_lock_stateid
,
3924 NFS4_LOCK_STID
, &lock_stp
);
3927 lock_sop
= lockowner(lock_stp
->st_stateowner
);
3928 fp
= lock_stp
->st_file
;
3930 /* lock_sop and lock_stp have been created or found */
3932 lkflg
= setlkflg(lock
->lk_type
);
3933 status
= nfs4_check_openmode(lock_stp
, lkflg
);
3937 status
= nfserr_grace
;
3938 if (locks_in_grace() && !lock
->lk_reclaim
)
3940 status
= nfserr_no_grace
;
3941 if (!locks_in_grace() && lock
->lk_reclaim
)
3944 locks_init_lock(&file_lock
);
3945 switch (lock
->lk_type
) {
3948 filp
= find_readable_file(lock_stp
->st_file
);
3950 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
3951 file_lock
.fl_type
= F_RDLCK
;
3954 case NFS4_WRITEW_LT
:
3955 filp
= find_writeable_file(lock_stp
->st_file
);
3957 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
3958 file_lock
.fl_type
= F_WRLCK
;
3961 status
= nfserr_inval
;
3965 status
= nfserr_openmode
;
3968 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3969 file_lock
.fl_pid
= current
->tgid
;
3970 file_lock
.fl_file
= filp
;
3971 file_lock
.fl_flags
= FL_POSIX
;
3972 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3974 file_lock
.fl_start
= lock
->lk_offset
;
3975 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3976 nfs4_transform_lock_offset(&file_lock
);
3979 * Try to lock the file in the VFS.
3980 * Note: locks.c uses the BKL to protect the inode's lock list.
3983 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
3985 case 0: /* success! */
3986 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
3987 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
3991 case (EAGAIN
): /* conflock holds conflicting lock */
3992 status
= nfserr_denied
;
3993 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3994 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3997 status
= nfserr_deadlock
;
4000 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4001 status
= nfserrno(err
);
4005 if (status
&& lock
->lk_is_new
&& lock_sop
)
4006 release_lockowner(lock_sop
);
4007 if (!cstate
->replay_owner
)
4008 nfs4_unlock_state();
4013 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4014 * so we do a temporary open here just to get an open file to pass to
4015 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4018 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4023 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4026 err
= vfs_test_lock(file
, lock
);
4035 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4036 struct nfsd4_lockt
*lockt
)
4038 struct inode
*inode
;
4039 struct file_lock file_lock
;
4040 struct nfs4_lockowner
*lo
;
4044 if (locks_in_grace())
4045 return nfserr_grace
;
4047 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4048 return nfserr_inval
;
4052 status
= nfserr_stale_clientid
;
4053 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4056 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4059 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4060 locks_init_lock(&file_lock
);
4061 switch (lockt
->lt_type
) {
4064 file_lock
.fl_type
= F_RDLCK
;
4067 case NFS4_WRITEW_LT
:
4068 file_lock
.fl_type
= F_WRLCK
;
4071 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4072 status
= nfserr_inval
;
4076 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4078 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4079 file_lock
.fl_pid
= current
->tgid
;
4080 file_lock
.fl_flags
= FL_POSIX
;
4082 file_lock
.fl_start
= lockt
->lt_offset
;
4083 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4085 nfs4_transform_lock_offset(&file_lock
);
4088 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4090 status
= nfserrno(error
);
4093 if (file_lock
.fl_type
!= F_UNLCK
) {
4094 status
= nfserr_denied
;
4095 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4098 nfs4_unlock_state();
4103 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4104 struct nfsd4_locku
*locku
)
4106 struct nfs4_ol_stateid
*stp
;
4107 struct file
*filp
= NULL
;
4108 struct file_lock file_lock
;
4112 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4113 (long long) locku
->lu_offset
,
4114 (long long) locku
->lu_length
);
4116 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4117 return nfserr_inval
;
4121 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4122 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4125 filp
= find_any_file(stp
->st_file
);
4127 status
= nfserr_lock_range
;
4131 locks_init_lock(&file_lock
);
4132 file_lock
.fl_type
= F_UNLCK
;
4133 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4134 file_lock
.fl_pid
= current
->tgid
;
4135 file_lock
.fl_file
= filp
;
4136 file_lock
.fl_flags
= FL_POSIX
;
4137 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4138 file_lock
.fl_start
= locku
->lu_offset
;
4140 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4141 nfs4_transform_lock_offset(&file_lock
);
4144 * Try to unlock the file in the VFS.
4146 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4148 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4152 * OK, unlock succeeded; the only thing left to do is update the stateid.
4154 update_stateid(&stp
->st_stid
.sc_stateid
);
4155 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4158 if (!cstate
->replay_owner
)
4159 nfs4_unlock_state();
4163 status
= nfserrno(err
);
4169 * 1: locks held by lockowner
4170 * 0: no locks held by lockowner
4173 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4175 struct file_lock
**flpp
;
4176 struct inode
*inode
= filp
->fi_inode
;
4180 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4181 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4192 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4193 struct nfsd4_compound_state
*cstate
,
4194 struct nfsd4_release_lockowner
*rlockowner
)
4196 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4197 struct nfs4_stateowner
*sop
;
4198 struct nfs4_lockowner
*lo
;
4199 struct nfs4_ol_stateid
*stp
;
4200 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4201 struct list_head matches
;
4205 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4206 clid
->cl_boot
, clid
->cl_id
);
4208 /* XXX check for lease expiration */
4210 status
= nfserr_stale_clientid
;
4211 if (STALE_CLIENTID(clid
))
4216 status
= nfserr_locks_held
;
4217 /* XXX: we're doing a linear search through all the lockowners.
4218 * Yipes! For now we'll just hope clients aren't really using
4219 * release_lockowner much, but eventually we have to fix these
4220 * data structures. */
4221 INIT_LIST_HEAD(&matches
);
4222 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4223 list_for_each_entry(sop
, &lock_ownerstr_hashtbl
[i
], so_strhash
) {
4224 if (!same_owner_str(sop
, owner
, clid
))
4226 list_for_each_entry(stp
, &sop
->so_stateids
,
4228 lo
= lockowner(sop
);
4229 if (check_for_locks(stp
->st_file
, lo
))
4231 list_add(&lo
->lo_list
, &matches
);
4235 /* Clients probably won't expect us to return with some (but not all)
4236 * of the lockowner state released; so don't release any until all
4237 * have been checked. */
4239 while (!list_empty(&matches
)) {
4240 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4242 /* unhash_stateowner deletes so_perclient only
4243 * for openowners. */
4244 list_del(&lo
->lo_list
);
4245 release_lockowner(lo
);
4248 nfs4_unlock_state();
4252 static inline struct nfs4_client_reclaim
*
4255 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4259 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4261 unsigned int strhashval
= clientstr_hashval(name
);
4262 struct nfs4_client
*clp
;
4264 clp
= find_confirmed_client_by_str(name
, strhashval
);
4269 * failure => all reset bets are off, nfserr_no_grace...
4272 nfs4_client_to_reclaim(const char *name
)
4274 unsigned int strhashval
;
4275 struct nfs4_client_reclaim
*crp
= NULL
;
4277 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4278 crp
= alloc_reclaim();
4281 strhashval
= clientstr_hashval(name
);
4282 INIT_LIST_HEAD(&crp
->cr_strhash
);
4283 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4284 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4285 reclaim_str_hashtbl_size
++;
4290 nfs4_release_reclaim(void)
4292 struct nfs4_client_reclaim
*crp
= NULL
;
4295 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4296 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4297 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4298 struct nfs4_client_reclaim
, cr_strhash
);
4299 list_del(&crp
->cr_strhash
);
4301 reclaim_str_hashtbl_size
--;
4304 BUG_ON(reclaim_str_hashtbl_size
);
4308 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4309 static struct nfs4_client_reclaim
*
4310 nfs4_find_reclaim_client(clientid_t
*clid
)
4312 unsigned int strhashval
;
4313 struct nfs4_client
*clp
;
4314 struct nfs4_client_reclaim
*crp
= NULL
;
4317 /* find clientid in conf_id_hashtbl */
4318 clp
= find_confirmed_client(clid
);
4322 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4323 clp
->cl_name
.len
, clp
->cl_name
.data
,
4326 /* find clp->cl_name in reclaim_str_hashtbl */
4327 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4328 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4329 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4337 * Called from OPEN. Look for clientid in reclaim list.
4340 nfs4_check_open_reclaim(clientid_t
*clid
)
4342 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4345 /* initialization to perform at module load time: */
4348 nfs4_state_init(void)
4352 status
= nfsd4_init_slabs();
4355 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4356 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4357 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4358 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4359 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4360 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4362 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4363 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4364 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4365 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4367 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4368 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4370 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4371 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4373 memset(&onestateid
, ~0, sizeof(stateid_t
));
4374 INIT_LIST_HEAD(&close_lru
);
4375 INIT_LIST_HEAD(&client_lru
);
4376 INIT_LIST_HEAD(&del_recall_lru
);
4377 reclaim_str_hashtbl_size
= 0;
4382 nfsd4_load_reboot_recovery_data(void)
4387 nfsd4_init_recdir();
4388 status
= nfsd4_recdir_load();
4389 nfs4_unlock_state();
4391 printk("NFSD: Failure reading reboot recovery data\n");
4395 * Since the lifetime of a delegation isn't limited to that of an open, a
4396 * client may quite reasonably hang on to a delegation as long as it has
4397 * the inode cached. This becomes an obvious problem the first time a
4398 * client's inode cache approaches the size of the server's total memory.
4400 * For now we avoid this problem by imposing a hard limit on the number
4401 * of delegations, which varies according to the server's memory size.
4404 set_max_delegations(void)
4407 * Allow at most 4 delegations per megabyte of RAM. Quick
4408 * estimates suggest that in the worst case (where every delegation
4409 * is for a different inode), a delegation could take about 1.5K,
4410 * giving a worst case usage of about 6% of memory.
4412 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4415 /* initialization to perform when the nfsd service is started: */
4418 __nfs4_state_start(void)
4422 boot_time
= get_seconds();
4423 locks_start_grace(&nfsd4_manager
);
4424 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4426 ret
= set_callback_cred();
4429 laundry_wq
= create_singlethread_workqueue("nfsd4");
4430 if (laundry_wq
== NULL
)
4432 ret
= nfsd4_create_callback_queue();
4434 goto out_free_laundry
;
4435 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4436 set_max_delegations();
4439 destroy_workqueue(laundry_wq
);
4444 nfs4_state_start(void)
4446 nfsd4_load_reboot_recovery_data();
4447 return __nfs4_state_start();
4451 __nfs4_state_shutdown(void)
4454 struct nfs4_client
*clp
= NULL
;
4455 struct nfs4_delegation
*dp
= NULL
;
4456 struct list_head
*pos
, *next
, reaplist
;
4458 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4459 while (!list_empty(&conf_id_hashtbl
[i
])) {
4460 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4463 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4464 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4468 INIT_LIST_HEAD(&reaplist
);
4469 spin_lock(&recall_lock
);
4470 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4471 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4472 list_move(&dp
->dl_recall_lru
, &reaplist
);
4474 spin_unlock(&recall_lock
);
4475 list_for_each_safe(pos
, next
, &reaplist
) {
4476 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4477 list_del_init(&dp
->dl_recall_lru
);
4478 unhash_delegation(dp
);
4481 nfsd4_shutdown_recdir();
4485 nfs4_state_shutdown(void)
4487 cancel_delayed_work_sync(&laundromat_work
);
4488 destroy_workqueue(laundry_wq
);
4489 locks_end_grace(&nfsd4_manager
);
4491 nfs4_release_reclaim();
4492 __nfs4_state_shutdown();
4493 nfs4_unlock_state();
4494 nfsd4_destroy_callback_queue();