2 * linux/fs/nfsd/nfs4state.c
4 * Copyright (c) 2001 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <kandros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/param.h>
38 #include <linux/major.h>
39 #include <linux/slab.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/cache.h>
44 #include <linux/file.h>
45 #include <linux/mount.h>
46 #include <linux/workqueue.h>
47 #include <linux/smp_lock.h>
48 #include <linux/kthread.h>
49 #include <linux/nfs4.h>
50 #include <linux/nfsd/state.h>
51 #include <linux/nfsd/xdr4.h>
52 #include <linux/namei.h>
53 #include <linux/swap.h>
54 #include <linux/mutex.h>
55 #include <linux/lockd/bind.h>
56 #include <linux/module.h>
57 #include <linux/sunrpc/svcauth_gss.h>
58 #include <linux/sunrpc/clnt.h>
60 #define NFSDDBG_FACILITY NFSDDBG_PROC
63 static time_t lease_time
= 90; /* default lease time */
64 static time_t user_lease_time
= 90;
65 static time_t boot_time
;
66 static u32 current_ownerid
= 1;
67 static u32 current_fileid
= 1;
68 static u32 current_delegid
= 1;
70 static stateid_t zerostateid
; /* bits all 0 */
71 static stateid_t onestateid
; /* bits all 1 */
72 static u64 current_sessionid
= 1;
74 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
75 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
77 /* forward declarations */
78 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
79 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
80 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
81 static void nfs4_set_recdir(char *recdir
);
85 /* Currently used for almost all code touching nfsv4 state: */
86 static DEFINE_MUTEX(client_mutex
);
89 * Currently used for the del_recall_lru and file hash table. In an
90 * effort to decrease the scope of the client_mutex, this spinlock may
91 * eventually cover more:
93 static DEFINE_SPINLOCK(recall_lock
);
95 static struct kmem_cache
*stateowner_slab
= NULL
;
96 static struct kmem_cache
*file_slab
= NULL
;
97 static struct kmem_cache
*stateid_slab
= NULL
;
98 static struct kmem_cache
*deleg_slab
= NULL
;
101 nfs4_lock_state(void)
103 mutex_lock(&client_mutex
);
107 nfs4_unlock_state(void)
109 mutex_unlock(&client_mutex
);
113 opaque_hashval(const void *ptr
, int nbytes
)
115 unsigned char *cptr
= (unsigned char *) ptr
;
125 static struct list_head del_recall_lru
;
128 put_nfs4_file(struct nfs4_file
*fi
)
130 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
131 list_del(&fi
->fi_hash
);
132 spin_unlock(&recall_lock
);
134 kmem_cache_free(file_slab
, fi
);
139 get_nfs4_file(struct nfs4_file
*fi
)
141 atomic_inc(&fi
->fi_ref
);
144 static int num_delegations
;
145 unsigned int max_delegations
;
148 * Open owner state (share locks)
151 /* hash tables for nfs4_stateowner */
152 #define OWNER_HASH_BITS 8
153 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
154 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
156 #define ownerid_hashval(id) \
157 ((id) & OWNER_HASH_MASK)
158 #define ownerstr_hashval(clientid, ownername) \
159 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
161 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
162 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
164 /* hash table for nfs4_file */
165 #define FILE_HASH_BITS 8
166 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
167 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
168 /* hash table for (open)nfs4_stateid */
169 #define STATEID_HASH_BITS 10
170 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
171 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
173 #define file_hashval(x) \
174 hash_ptr(x, FILE_HASH_BITS)
175 #define stateid_hashval(owner_id, file_id) \
176 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
178 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
179 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
181 static struct nfs4_delegation
*
182 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
184 struct nfs4_delegation
*dp
;
185 struct nfs4_file
*fp
= stp
->st_file
;
186 struct nfs4_cb_conn
*cb
= &stp
->st_stateowner
->so_client
->cl_cb_conn
;
188 dprintk("NFSD alloc_init_deleg\n");
189 if (fp
->fi_had_conflict
)
191 if (num_delegations
> max_delegations
)
193 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
197 INIT_LIST_HEAD(&dp
->dl_perfile
);
198 INIT_LIST_HEAD(&dp
->dl_perclnt
);
199 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
204 get_file(stp
->st_vfs_file
);
205 dp
->dl_vfs_file
= stp
->st_vfs_file
;
207 dp
->dl_ident
= cb
->cb_ident
;
208 dp
->dl_stateid
.si_boot
= get_seconds();
209 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
210 dp
->dl_stateid
.si_fileid
= 0;
211 dp
->dl_stateid
.si_generation
= 0;
212 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
214 atomic_set(&dp
->dl_count
, 1);
215 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
216 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
221 nfs4_put_delegation(struct nfs4_delegation
*dp
)
223 if (atomic_dec_and_test(&dp
->dl_count
)) {
224 dprintk("NFSD: freeing dp %p\n",dp
);
225 put_nfs4_file(dp
->dl_file
);
226 kmem_cache_free(deleg_slab
, dp
);
231 /* Remove the associated file_lock first, then remove the delegation.
232 * lease_modify() is called to remove the FS_LEASE file_lock from
233 * the i_flock list, eventually calling nfsd's lock_manager
234 * fl_release_callback.
237 nfs4_close_delegation(struct nfs4_delegation
*dp
)
239 struct file
*filp
= dp
->dl_vfs_file
;
241 dprintk("NFSD: close_delegation dp %p\n",dp
);
242 dp
->dl_vfs_file
= NULL
;
243 /* The following nfsd_close may not actually close the file,
244 * but we want to remove the lease in any case. */
246 vfs_setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
250 /* Called under the state lock. */
252 unhash_delegation(struct nfs4_delegation
*dp
)
254 list_del_init(&dp
->dl_perfile
);
255 list_del_init(&dp
->dl_perclnt
);
256 spin_lock(&recall_lock
);
257 list_del_init(&dp
->dl_recall_lru
);
258 spin_unlock(&recall_lock
);
259 nfs4_close_delegation(dp
);
260 nfs4_put_delegation(dp
);
267 /* Hash tables for nfs4_clientid state */
268 #define CLIENT_HASH_BITS 4
269 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
270 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
272 #define clientid_hashval(id) \
273 ((id) & CLIENT_HASH_MASK)
274 #define clientstr_hashval(name) \
275 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
277 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
278 * used in reboot/reset lease grace period processing
280 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
281 * setclientid_confirmed info.
283 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
286 * client_lru holds client queue ordered by nfs4_client.cl_time
289 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
290 * for last close replay.
292 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
293 static int reclaim_str_hashtbl_size
= 0;
294 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
295 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
296 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
297 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
298 static struct list_head client_lru
;
299 static struct list_head close_lru
;
301 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
303 list_del(&stp
->st_hash
);
304 list_del(&stp
->st_perfile
);
305 list_del(&stp
->st_perstateowner
);
308 static void free_generic_stateid(struct nfs4_stateid
*stp
)
310 put_nfs4_file(stp
->st_file
);
311 kmem_cache_free(stateid_slab
, stp
);
314 static void release_lock_stateid(struct nfs4_stateid
*stp
)
316 unhash_generic_stateid(stp
);
317 locks_remove_posix(stp
->st_vfs_file
, (fl_owner_t
)stp
->st_stateowner
);
318 free_generic_stateid(stp
);
321 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
323 struct nfs4_stateid
*stp
;
325 list_del(&sop
->so_idhash
);
326 list_del(&sop
->so_strhash
);
327 list_del(&sop
->so_perstateid
);
328 while (!list_empty(&sop
->so_stateids
)) {
329 stp
= list_first_entry(&sop
->so_stateids
,
330 struct nfs4_stateid
, st_perstateowner
);
331 release_lock_stateid(stp
);
335 static void release_lockowner(struct nfs4_stateowner
*sop
)
337 unhash_lockowner(sop
);
338 nfs4_put_stateowner(sop
);
342 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
344 struct nfs4_stateowner
*lock_sop
;
346 while (!list_empty(&open_stp
->st_lockowners
)) {
347 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
348 struct nfs4_stateowner
, so_perstateid
);
349 /* list_del(&open_stp->st_lockowners); */
350 BUG_ON(lock_sop
->so_is_open_owner
);
351 release_lockowner(lock_sop
);
355 static void release_open_stateid(struct nfs4_stateid
*stp
)
357 unhash_generic_stateid(stp
);
358 release_stateid_lockowners(stp
);
359 nfsd_close(stp
->st_vfs_file
);
360 free_generic_stateid(stp
);
363 static void unhash_openowner(struct nfs4_stateowner
*sop
)
365 struct nfs4_stateid
*stp
;
367 list_del(&sop
->so_idhash
);
368 list_del(&sop
->so_strhash
);
369 list_del(&sop
->so_perclient
);
370 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
371 while (!list_empty(&sop
->so_stateids
)) {
372 stp
= list_first_entry(&sop
->so_stateids
,
373 struct nfs4_stateid
, st_perstateowner
);
374 release_open_stateid(stp
);
378 static void release_openowner(struct nfs4_stateowner
*sop
)
380 unhash_openowner(sop
);
381 list_del(&sop
->so_close_lru
);
382 nfs4_put_stateowner(sop
);
385 static DEFINE_SPINLOCK(sessionid_lock
);
386 #define SESSION_HASH_SIZE 512
387 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
390 hash_sessionid(struct nfs4_sessionid
*sessionid
)
392 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
394 return sid
->sequence
% SESSION_HASH_SIZE
;
398 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
400 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
401 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
405 gen_sessionid(struct nfsd4_session
*ses
)
407 struct nfs4_client
*clp
= ses
->se_client
;
408 struct nfsd4_sessionid
*sid
;
410 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
411 sid
->clientid
= clp
->cl_clientid
;
412 sid
->sequence
= current_sessionid
++;
417 * The protocol defines ca_maxresponssize_cached to include the size of
418 * the rpc header, but all we need to cache is the data starting after
419 * the end of the initial SEQUENCE operation--the rest we regenerate
420 * each time. Therefore we can advertise a ca_maxresponssize_cached
421 * value that is the number of bytes in our cache plus a few additional
422 * bytes. In order to stay on the safe side, and not promise more than
423 * we can cache, those additional bytes must be the minimum possible: 24
424 * bytes of rpc header (xid through accept state, with AUTH_NULL
425 * verifier), 12 for the compound header (with zero-length tag), and 44
426 * for the SEQUENCE op response:
428 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
431 * Give the client the number of ca_maxresponsesize_cached slots it
432 * requests, of size bounded by NFSD_SLOT_CACHE_SIZE,
433 * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more
434 * than NFSD_MAX_SLOTS_PER_SESSION.
436 * If we run out of reserved DRC memory we should (up to a point)
437 * re-negotiate active sessions and reduce their slot usage to make
438 * rooom for new connections. For now we just fail the create session.
440 static int set_forechannel_drc_size(struct nfsd4_channel_attrs
*fchan
)
442 int mem
, size
= fchan
->maxresp_cached
;
444 if (fchan
->maxreqs
< 1)
447 if (size
< NFSD_MIN_HDR_SEQ_SZ
)
448 size
= NFSD_MIN_HDR_SEQ_SZ
;
449 size
-= NFSD_MIN_HDR_SEQ_SZ
;
450 if (size
> NFSD_SLOT_CACHE_SIZE
)
451 size
= NFSD_SLOT_CACHE_SIZE
;
453 /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */
454 mem
= fchan
->maxreqs
* size
;
455 if (mem
> NFSD_MAX_MEM_PER_SESSION
) {
456 fchan
->maxreqs
= NFSD_MAX_MEM_PER_SESSION
/ size
;
457 if (fchan
->maxreqs
> NFSD_MAX_SLOTS_PER_SESSION
)
458 fchan
->maxreqs
= NFSD_MAX_SLOTS_PER_SESSION
;
459 mem
= fchan
->maxreqs
* size
;
462 spin_lock(&nfsd_drc_lock
);
463 /* bound the total session drc memory ussage */
464 if (mem
+ nfsd_drc_mem_used
> nfsd_drc_max_mem
) {
465 fchan
->maxreqs
= (nfsd_drc_max_mem
- nfsd_drc_mem_used
) / size
;
466 mem
= fchan
->maxreqs
* size
;
468 nfsd_drc_mem_used
+= mem
;
469 spin_unlock(&nfsd_drc_lock
);
471 if (fchan
->maxreqs
== 0)
472 return nfserr_serverfault
;
474 fchan
->maxresp_cached
= size
+ NFSD_MIN_HDR_SEQ_SZ
;
479 * fchan holds the client values on input, and the server values on output
481 static int init_forechannel_attrs(struct svc_rqst
*rqstp
,
482 struct nfsd4_channel_attrs
*session_fchan
,
483 struct nfsd4_channel_attrs
*fchan
)
486 __u32 maxcount
= svc_max_payload(rqstp
);
488 /* headerpadsz set to zero in encode routine */
490 /* Use the client's max request and max response size if possible */
491 if (fchan
->maxreq_sz
> maxcount
)
492 fchan
->maxreq_sz
= maxcount
;
493 session_fchan
->maxreq_sz
= fchan
->maxreq_sz
;
495 if (fchan
->maxresp_sz
> maxcount
)
496 fchan
->maxresp_sz
= maxcount
;
497 session_fchan
->maxresp_sz
= fchan
->maxresp_sz
;
499 /* Use the client's maxops if possible */
500 if (fchan
->maxops
> NFSD_MAX_OPS_PER_COMPOUND
)
501 fchan
->maxops
= NFSD_MAX_OPS_PER_COMPOUND
;
502 session_fchan
->maxops
= fchan
->maxops
;
504 /* FIXME: Error means no more DRC pages so the server should
505 * recover pages from existing sessions. For now fail session
508 status
= set_forechannel_drc_size(fchan
);
510 session_fchan
->maxresp_cached
= fchan
->maxresp_cached
;
511 session_fchan
->maxreqs
= fchan
->maxreqs
;
513 dprintk("%s status %d\n", __func__
, status
);
518 free_session_slots(struct nfsd4_session
*ses
)
522 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
523 kfree(ses
->se_slots
[i
]);
527 alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
,
528 struct nfsd4_create_session
*cses
)
530 struct nfsd4_session
*new, tmp
;
531 struct nfsd4_slot
*sp
;
532 int idx
, slotsize
, cachesize
, i
;
535 memset(&tmp
, 0, sizeof(tmp
));
537 /* FIXME: For now, we just accept the client back channel attributes. */
538 tmp
.se_bchannel
= cses
->back_channel
;
539 status
= init_forechannel_attrs(rqstp
, &tmp
.se_fchannel
,
540 &cses
->fore_channel
);
544 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
)
545 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
547 status
= nfserr_serverfault
;
548 /* allocate struct nfsd4_session and slot table pointers in one piece */
549 slotsize
= tmp
.se_fchannel
.maxreqs
* sizeof(struct nfsd4_slot
*);
550 new = kzalloc(sizeof(*new) + slotsize
, GFP_KERNEL
);
554 memcpy(new, &tmp
, sizeof(*new));
556 /* allocate each struct nfsd4_slot and data cache in one piece */
557 cachesize
= new->se_fchannel
.maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
558 for (i
= 0; i
< new->se_fchannel
.maxreqs
; i
++) {
559 sp
= kzalloc(sizeof(*sp
) + cachesize
, GFP_KERNEL
);
562 new->se_slots
[i
] = sp
;
565 new->se_client
= clp
;
567 idx
= hash_sessionid(&new->se_sessionid
);
568 memcpy(clp
->cl_sessionid
.data
, new->se_sessionid
.data
,
569 NFS4_MAX_SESSIONID_LEN
);
571 new->se_flags
= cses
->flags
;
572 kref_init(&new->se_ref
);
573 spin_lock(&sessionid_lock
);
574 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
575 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
576 spin_unlock(&sessionid_lock
);
582 free_session_slots(new);
587 /* caller must hold sessionid_lock */
588 static struct nfsd4_session
*
589 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
591 struct nfsd4_session
*elem
;
594 dump_sessionid(__func__
, sessionid
);
595 idx
= hash_sessionid(sessionid
);
596 dprintk("%s: idx is %d\n", __func__
, idx
);
597 /* Search in the appropriate list */
598 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
599 dump_sessionid("list traversal", &elem
->se_sessionid
);
600 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
601 NFS4_MAX_SESSIONID_LEN
)) {
606 dprintk("%s: session not found\n", __func__
);
610 /* caller must hold sessionid_lock */
612 unhash_session(struct nfsd4_session
*ses
)
614 list_del(&ses
->se_hash
);
615 list_del(&ses
->se_perclnt
);
619 release_session(struct nfsd4_session
*ses
)
621 spin_lock(&sessionid_lock
);
623 spin_unlock(&sessionid_lock
);
624 nfsd4_put_session(ses
);
628 free_session(struct kref
*kref
)
630 struct nfsd4_session
*ses
;
632 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
633 spin_lock(&nfsd_drc_lock
);
634 nfsd_drc_mem_used
-= ses
->se_fchannel
.maxreqs
* NFSD_SLOT_CACHE_SIZE
;
635 spin_unlock(&nfsd_drc_lock
);
636 free_session_slots(ses
);
641 renew_client(struct nfs4_client
*clp
)
644 * Move client to the end to the LRU list.
646 dprintk("renewing client (clientid %08x/%08x)\n",
647 clp
->cl_clientid
.cl_boot
,
648 clp
->cl_clientid
.cl_id
);
649 list_move_tail(&clp
->cl_lru
, &client_lru
);
650 clp
->cl_time
= get_seconds();
653 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
655 STALE_CLIENTID(clientid_t
*clid
)
657 if (clid
->cl_boot
== boot_time
)
659 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
660 clid
->cl_boot
, clid
->cl_id
, boot_time
);
665 * XXX Should we use a slab cache ?
666 * This type of memory management is somewhat inefficient, but we use it
667 * anyway since SETCLIENTID is not a common operation.
669 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
671 struct nfs4_client
*clp
;
673 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
676 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
677 if (clp
->cl_name
.data
== NULL
) {
681 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
682 clp
->cl_name
.len
= name
.len
;
687 shutdown_callback_client(struct nfs4_client
*clp
)
689 struct rpc_clnt
*clnt
= clp
->cl_cb_conn
.cb_client
;
693 * Callback threads take a reference on the client, so there
694 * should be no outstanding callbacks at this point.
696 clp
->cl_cb_conn
.cb_client
= NULL
;
697 rpc_shutdown_client(clnt
);
702 free_client(struct nfs4_client
*clp
)
704 shutdown_callback_client(clp
);
706 svc_xprt_put(clp
->cl_cb_xprt
);
707 if (clp
->cl_cred
.cr_group_info
)
708 put_group_info(clp
->cl_cred
.cr_group_info
);
709 kfree(clp
->cl_principal
);
710 kfree(clp
->cl_name
.data
);
715 put_nfs4_client(struct nfs4_client
*clp
)
717 if (atomic_dec_and_test(&clp
->cl_count
))
722 expire_client(struct nfs4_client
*clp
)
724 struct nfs4_stateowner
*sop
;
725 struct nfs4_delegation
*dp
;
726 struct list_head reaplist
;
728 dprintk("NFSD: expire_client cl_count %d\n",
729 atomic_read(&clp
->cl_count
));
731 INIT_LIST_HEAD(&reaplist
);
732 spin_lock(&recall_lock
);
733 while (!list_empty(&clp
->cl_delegations
)) {
734 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
735 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
737 list_del_init(&dp
->dl_perclnt
);
738 list_move(&dp
->dl_recall_lru
, &reaplist
);
740 spin_unlock(&recall_lock
);
741 while (!list_empty(&reaplist
)) {
742 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
743 list_del_init(&dp
->dl_recall_lru
);
744 unhash_delegation(dp
);
746 list_del(&clp
->cl_idhash
);
747 list_del(&clp
->cl_strhash
);
748 list_del(&clp
->cl_lru
);
749 while (!list_empty(&clp
->cl_openowners
)) {
750 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
751 release_openowner(sop
);
753 while (!list_empty(&clp
->cl_sessions
)) {
754 struct nfsd4_session
*ses
;
755 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
757 release_session(ses
);
759 put_nfs4_client(clp
);
762 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
764 memcpy(target
->cl_verifier
.data
, source
->data
,
765 sizeof(target
->cl_verifier
.data
));
768 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
770 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
771 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
774 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
776 target
->cr_uid
= source
->cr_uid
;
777 target
->cr_gid
= source
->cr_gid
;
778 target
->cr_group_info
= source
->cr_group_info
;
779 get_group_info(target
->cr_group_info
);
782 static int same_name(const char *n1
, const char *n2
)
784 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
788 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
790 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
794 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
796 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
799 /* XXX what about NGROUP */
801 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
803 return cr1
->cr_uid
== cr2
->cr_uid
;
806 static void gen_clid(struct nfs4_client
*clp
)
808 static u32 current_clientid
= 1;
810 clp
->cl_clientid
.cl_boot
= boot_time
;
811 clp
->cl_clientid
.cl_id
= current_clientid
++;
814 static void gen_confirm(struct nfs4_client
*clp
)
819 p
= (u32
*)clp
->cl_confirm
.data
;
820 *p
++ = get_seconds();
824 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
825 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
827 struct nfs4_client
*clp
;
828 struct sockaddr
*sa
= svc_addr(rqstp
);
831 clp
= alloc_client(name
);
835 princ
= svc_gss_principal(rqstp
);
837 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
838 if (clp
->cl_principal
== NULL
) {
844 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
845 atomic_set(&clp
->cl_count
, 1);
846 atomic_set(&clp
->cl_cb_conn
.cb_set
, 0);
847 INIT_LIST_HEAD(&clp
->cl_idhash
);
848 INIT_LIST_HEAD(&clp
->cl_strhash
);
849 INIT_LIST_HEAD(&clp
->cl_openowners
);
850 INIT_LIST_HEAD(&clp
->cl_delegations
);
851 INIT_LIST_HEAD(&clp
->cl_sessions
);
852 INIT_LIST_HEAD(&clp
->cl_lru
);
853 clear_bit(0, &clp
->cl_cb_slot_busy
);
854 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
855 copy_verf(clp
, verf
);
856 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
857 clp
->cl_flavor
= rqstp
->rq_flavor
;
858 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
864 static int check_name(struct xdr_netobj name
)
868 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
869 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
876 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
878 unsigned int idhashval
;
880 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
881 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
882 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
883 list_add_tail(&clp
->cl_lru
, &client_lru
);
884 clp
->cl_time
= get_seconds();
888 move_to_confirmed(struct nfs4_client
*clp
)
890 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
891 unsigned int strhashval
;
893 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
894 list_del_init(&clp
->cl_strhash
);
895 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
896 strhashval
= clientstr_hashval(clp
->cl_recdir
);
897 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
901 static struct nfs4_client
*
902 find_confirmed_client(clientid_t
*clid
)
904 struct nfs4_client
*clp
;
905 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
907 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
908 if (same_clid(&clp
->cl_clientid
, clid
))
914 static struct nfs4_client
*
915 find_unconfirmed_client(clientid_t
*clid
)
917 struct nfs4_client
*clp
;
918 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
920 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
921 if (same_clid(&clp
->cl_clientid
, clid
))
928 * Return 1 iff clp's clientid establishment method matches the use_exchange_id
929 * parameter. Matching is based on the fact the at least one of the
930 * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1
932 * FIXME: we need to unify the clientid namespaces for nfsv4.x
933 * and correctly deal with client upgrade/downgrade in EXCHANGE_ID
934 * and SET_CLIENTID{,_CONFIRM}
937 match_clientid_establishment(struct nfs4_client
*clp
, bool use_exchange_id
)
939 bool has_exchange_flags
= (clp
->cl_exchange_flags
!= 0);
940 return use_exchange_id
== has_exchange_flags
;
943 static struct nfs4_client
*
944 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
,
945 bool use_exchange_id
)
947 struct nfs4_client
*clp
;
949 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
950 if (same_name(clp
->cl_recdir
, dname
) &&
951 match_clientid_establishment(clp
, use_exchange_id
))
957 static struct nfs4_client
*
958 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
,
959 bool use_exchange_id
)
961 struct nfs4_client
*clp
;
963 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
964 if (same_name(clp
->cl_recdir
, dname
) &&
965 match_clientid_establishment(clp
, use_exchange_id
))
972 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, u32 scopeid
)
974 struct nfs4_cb_conn
*cb
= &clp
->cl_cb_conn
;
975 unsigned short expected_family
;
977 /* Currently, we only support tcp and tcp6 for the callback channel */
978 if (se
->se_callback_netid_len
== 3 &&
979 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
980 expected_family
= AF_INET
;
981 else if (se
->se_callback_netid_len
== 4 &&
982 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
983 expected_family
= AF_INET6
;
987 cb
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
988 se
->se_callback_addr_len
,
989 (struct sockaddr
*) &cb
->cb_addr
,
990 sizeof(cb
->cb_addr
));
992 if (!cb
->cb_addrlen
|| cb
->cb_addr
.ss_family
!= expected_family
)
995 if (cb
->cb_addr
.ss_family
== AF_INET6
)
996 ((struct sockaddr_in6
*) &cb
->cb_addr
)->sin6_scope_id
= scopeid
;
998 cb
->cb_minorversion
= 0;
999 cb
->cb_prog
= se
->se_callback_prog
;
1000 cb
->cb_ident
= se
->se_callback_ident
;
1003 cb
->cb_addr
.ss_family
= AF_UNSPEC
;
1005 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1006 "will not receive delegations\n",
1007 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1013 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1016 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1018 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1021 dprintk("--> %s slot %p\n", __func__
, slot
);
1023 slot
->sl_opcnt
= resp
->opcnt
;
1024 slot
->sl_status
= resp
->cstate
.status
;
1026 if (nfsd4_not_cached(resp
)) {
1027 slot
->sl_datalen
= 0;
1030 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1031 base
= (char *)resp
->cstate
.datap
-
1032 (char *)resp
->xbuf
->head
[0].iov_base
;
1033 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1035 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1040 * Encode the replay sequence operation from the slot values.
1041 * If cachethis is FALSE encode the uncached rep error on the next
1042 * operation which sets resp->p and increments resp->opcnt for
1043 * nfs4svc_encode_compoundres.
1047 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1048 struct nfsd4_compoundres
*resp
)
1050 struct nfsd4_op
*op
;
1051 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1053 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1054 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1056 /* Encode the replayed sequence operation */
1057 op
= &args
->ops
[resp
->opcnt
- 1];
1058 nfsd4_encode_operation(resp
, op
);
1060 /* Return nfserr_retry_uncached_rep in next operation. */
1061 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1062 op
= &args
->ops
[resp
->opcnt
++];
1063 op
->status
= nfserr_retry_uncached_rep
;
1064 nfsd4_encode_operation(resp
, op
);
1070 * The sequence operation is not cached because we can use the slot and
1074 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1075 struct nfsd4_sequence
*seq
)
1077 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1080 dprintk("--> %s slot %p\n", __func__
, slot
);
1082 /* Either returns 0 or nfserr_retry_uncached */
1083 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1084 if (status
== nfserr_retry_uncached_rep
)
1087 /* The sequence operation has been encoded, cstate->datap set. */
1088 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1090 resp
->opcnt
= slot
->sl_opcnt
;
1091 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1092 status
= slot
->sl_status
;
1098 * Set the exchange_id flags returned by the server.
1101 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1103 /* pNFS is not supported */
1104 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1106 /* Referrals are supported, Migration is not. */
1107 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1109 /* set the wire flags to return to client. */
1110 clid
->flags
= new->cl_exchange_flags
;
1114 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1115 struct nfsd4_compound_state
*cstate
,
1116 struct nfsd4_exchange_id
*exid
)
1118 struct nfs4_client
*unconf
, *conf
, *new;
1120 unsigned int strhashval
;
1121 char dname
[HEXDIR_LEN
];
1122 char addr_str
[INET6_ADDRSTRLEN
];
1123 nfs4_verifier verf
= exid
->verifier
;
1124 struct sockaddr
*sa
= svc_addr(rqstp
);
1126 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1127 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1128 "ip_addr=%s flags %x, spa_how %d\n",
1129 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1130 addr_str
, exid
->flags
, exid
->spa_how
);
1132 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1133 return nfserr_inval
;
1135 /* Currently only support SP4_NONE */
1136 switch (exid
->spa_how
) {
1140 return nfserr_encr_alg_unsupp
;
1142 BUG(); /* checked by xdr code */
1144 return nfserr_serverfault
; /* no excuse :-/ */
1147 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1152 strhashval
= clientstr_hashval(dname
);
1157 conf
= find_confirmed_client_by_str(dname
, strhashval
, true);
1159 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1160 /* 18.35.4 case 8 */
1161 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1162 status
= nfserr_not_same
;
1165 /* Client reboot: destroy old state */
1166 expire_client(conf
);
1169 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1170 /* 18.35.4 case 9 */
1171 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1172 status
= nfserr_perm
;
1175 expire_client(conf
);
1179 * Set bit when the owner id and verifier map to an already
1180 * confirmed client id (18.35.3).
1182 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1185 * Falling into 18.35.4 case 2, possible router replay.
1186 * Leave confirmed record intact and return same result.
1188 copy_verf(conf
, &verf
);
1193 /* 18.35.4 case 7 */
1194 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1195 status
= nfserr_noent
;
1199 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, true);
1202 * Possible retry or client restart. Per 18.35.4 case 4,
1203 * a new unconfirmed record should be generated regardless
1204 * of whether any properties have changed.
1206 expire_client(unconf
);
1211 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1213 status
= nfserr_serverfault
;
1218 add_to_unconfirmed(new, strhashval
);
1220 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1221 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1224 nfsd4_set_ex_flags(new, exid
);
1226 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1227 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1231 nfs4_unlock_state();
1233 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1238 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1240 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1243 /* The slot is in use, and no response has been sent. */
1245 if (seqid
== slot_seqid
)
1246 return nfserr_jukebox
;
1248 return nfserr_seq_misordered
;
1251 if (likely(seqid
== slot_seqid
+ 1))
1254 if (seqid
== slot_seqid
)
1255 return nfserr_replay_cache
;
1257 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1259 /* Misordered replay or misordered new request */
1260 return nfserr_seq_misordered
;
1264 * Cache the create session result into the create session single DRC
1265 * slot cache by saving the xdr structure. sl_seqid has been set.
1266 * Do this for solo or embedded create session operations.
1269 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1270 struct nfsd4_clid_slot
*slot
, int nfserr
)
1272 slot
->sl_status
= nfserr
;
1273 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1277 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1278 struct nfsd4_clid_slot
*slot
)
1280 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1281 return slot
->sl_status
;
1285 nfsd4_create_session(struct svc_rqst
*rqstp
,
1286 struct nfsd4_compound_state
*cstate
,
1287 struct nfsd4_create_session
*cr_ses
)
1289 struct sockaddr
*sa
= svc_addr(rqstp
);
1290 struct nfs4_client
*conf
, *unconf
;
1291 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1295 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1296 conf
= find_confirmed_client(&cr_ses
->clientid
);
1299 cs_slot
= &conf
->cl_cs_slot
;
1300 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1301 if (status
== nfserr_replay_cache
) {
1302 dprintk("Got a create_session replay! seqid= %d\n",
1304 /* Return the cached reply status */
1305 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1307 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1308 status
= nfserr_seq_misordered
;
1309 dprintk("Sequence misordered!\n");
1310 dprintk("Expected seqid= %d but got seqid= %d\n",
1311 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1314 cs_slot
->sl_seqid
++;
1315 } else if (unconf
) {
1316 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1317 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1318 status
= nfserr_clid_inuse
;
1322 cs_slot
= &unconf
->cl_cs_slot
;
1323 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1325 /* an unconfirmed replay returns misordered */
1326 status
= nfserr_seq_misordered
;
1330 cs_slot
->sl_seqid
++; /* from 0 to 1 */
1331 move_to_confirmed(unconf
);
1334 * We do not support RDMA or persistent sessions
1336 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1337 cr_ses
->flags
&= ~SESSION4_RDMA
;
1339 if (cr_ses
->flags
& SESSION4_BACK_CHAN
) {
1340 unconf
->cl_cb_xprt
= rqstp
->rq_xprt
;
1341 svc_xprt_get(unconf
->cl_cb_xprt
);
1343 (struct sockaddr
*)&unconf
->cl_cb_conn
.cb_addr
,
1345 unconf
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1346 unconf
->cl_cb_conn
.cb_minorversion
=
1347 cstate
->minorversion
;
1348 unconf
->cl_cb_conn
.cb_prog
= cr_ses
->callback_prog
;
1349 unconf
->cl_cb_seq_nr
= 1;
1350 nfsd4_probe_callback(unconf
);
1354 status
= nfserr_stale_clientid
;
1358 status
= alloc_init_session(rqstp
, conf
, cr_ses
);
1362 memcpy(cr_ses
->sessionid
.data
, conf
->cl_sessionid
.data
,
1363 NFS4_MAX_SESSIONID_LEN
);
1364 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1367 /* cache solo and embedded create sessions under the state lock */
1368 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1370 nfs4_unlock_state();
1371 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1376 nfsd4_destroy_session(struct svc_rqst
*r
,
1377 struct nfsd4_compound_state
*cstate
,
1378 struct nfsd4_destroy_session
*sessionid
)
1380 struct nfsd4_session
*ses
;
1381 u32 status
= nfserr_badsession
;
1384 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1385 * - Should we return nfserr_back_chan_busy if waiting for
1386 * callbacks on to-be-destroyed session?
1387 * - Do we need to clear any callback info from previous session?
1390 dump_sessionid(__func__
, &sessionid
->sessionid
);
1391 spin_lock(&sessionid_lock
);
1392 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1394 spin_unlock(&sessionid_lock
);
1398 unhash_session(ses
);
1399 spin_unlock(&sessionid_lock
);
1401 /* wait for callbacks */
1402 shutdown_callback_client(ses
->se_client
);
1403 nfsd4_put_session(ses
);
1406 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1411 nfsd4_sequence(struct svc_rqst
*rqstp
,
1412 struct nfsd4_compound_state
*cstate
,
1413 struct nfsd4_sequence
*seq
)
1415 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1416 struct nfsd4_session
*session
;
1417 struct nfsd4_slot
*slot
;
1420 if (resp
->opcnt
!= 1)
1421 return nfserr_sequence_pos
;
1423 spin_lock(&sessionid_lock
);
1424 status
= nfserr_badsession
;
1425 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1429 status
= nfserr_badslot
;
1430 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1433 slot
= session
->se_slots
[seq
->slotid
];
1434 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1436 /* We do not negotiate the number of slots yet, so set the
1437 * maxslots to the session maxreqs which is used to encode
1438 * sr_highest_slotid and the sr_target_slot id to maxslots */
1439 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1441 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1442 if (status
== nfserr_replay_cache
) {
1443 cstate
->slot
= slot
;
1444 cstate
->session
= session
;
1445 /* Return the cached reply status and set cstate->status
1446 * for nfsd4_proc_compound processing */
1447 status
= nfsd4_replay_cache_entry(resp
, seq
);
1448 cstate
->status
= nfserr_replay_cache
;
1454 /* Success! bump slot seqid */
1455 slot
->sl_inuse
= true;
1456 slot
->sl_seqid
= seq
->seqid
;
1457 slot
->sl_cachethis
= seq
->cachethis
;
1459 cstate
->slot
= slot
;
1460 cstate
->session
= session
;
1462 /* Hold a session reference until done processing the compound:
1463 * nfsd4_put_session called only if the cstate slot is set.
1465 nfsd4_get_session(session
);
1467 spin_unlock(&sessionid_lock
);
1468 /* Renew the clientid on success and on replay */
1469 if (cstate
->session
) {
1471 renew_client(session
->se_client
);
1472 nfs4_unlock_state();
1474 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1479 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1480 struct nfsd4_setclientid
*setclid
)
1482 struct sockaddr
*sa
= svc_addr(rqstp
);
1483 struct xdr_netobj clname
= {
1484 .len
= setclid
->se_namelen
,
1485 .data
= setclid
->se_name
,
1487 nfs4_verifier clverifier
= setclid
->se_verf
;
1488 unsigned int strhashval
;
1489 struct nfs4_client
*conf
, *unconf
, *new;
1491 char dname
[HEXDIR_LEN
];
1493 if (!check_name(clname
))
1494 return nfserr_inval
;
1496 status
= nfs4_make_rec_clidname(dname
, &clname
);
1501 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1502 * We get here on a DRC miss.
1505 strhashval
= clientstr_hashval(dname
);
1508 conf
= find_confirmed_client_by_str(dname
, strhashval
, false);
1510 /* RFC 3530 14.2.33 CASE 0: */
1511 status
= nfserr_clid_inuse
;
1512 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1513 char addr_str
[INET6_ADDRSTRLEN
];
1514 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1516 dprintk("NFSD: setclientid: string in use by client "
1517 "at %s\n", addr_str
);
1522 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1523 * has a description of SETCLIENTID request processing consisting
1524 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1526 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, false);
1527 status
= nfserr_resource
;
1530 * RFC 3530 14.2.33 CASE 4:
1531 * placed first, because it is the normal case
1534 expire_client(unconf
);
1535 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1539 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1541 * RFC 3530 14.2.33 CASE 1:
1542 * probable callback update
1545 /* Note this is removing unconfirmed {*x***},
1546 * which is stronger than RFC recommended {vxc**}.
1547 * This has the advantage that there is at most
1548 * one {*x***} in either list at any time.
1550 expire_client(unconf
);
1552 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1555 copy_clid(new, conf
);
1556 } else if (!unconf
) {
1558 * RFC 3530 14.2.33 CASE 2:
1559 * probable client reboot; state will be removed if
1562 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1568 * RFC 3530 14.2.33 CASE 3:
1569 * probable client reboot; state will be removed if
1572 expire_client(unconf
);
1573 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1578 gen_callback(new, setclid
, rpc_get_scope_id(sa
));
1579 add_to_unconfirmed(new, strhashval
);
1580 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1581 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
1582 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
1585 nfs4_unlock_state();
1591 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1592 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1593 * bullets, labeled as CASE1 - CASE4 below.
1596 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
1597 struct nfsd4_compound_state
*cstate
,
1598 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
1600 struct sockaddr
*sa
= svc_addr(rqstp
);
1601 struct nfs4_client
*conf
, *unconf
;
1602 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
1603 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
1606 if (STALE_CLIENTID(clid
))
1607 return nfserr_stale_clientid
;
1609 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1610 * We get here on a DRC miss.
1615 conf
= find_confirmed_client(clid
);
1616 unconf
= find_unconfirmed_client(clid
);
1618 status
= nfserr_clid_inuse
;
1619 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
1621 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
1625 * section 14.2.34 of RFC 3530 has a description of
1626 * SETCLIENTID_CONFIRM request processing consisting
1627 * of 4 bullet points, labeled as CASE1 - CASE4 below.
1629 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
1631 * RFC 3530 14.2.34 CASE 1:
1634 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
1635 status
= nfserr_clid_inuse
;
1637 /* XXX: We just turn off callbacks until we can handle
1638 * change request correctly. */
1639 atomic_set(&conf
->cl_cb_conn
.cb_set
, 0);
1640 expire_client(unconf
);
1644 } else if (conf
&& !unconf
) {
1646 * RFC 3530 14.2.34 CASE 2:
1647 * probable retransmitted request; play it safe and
1650 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
1651 status
= nfserr_clid_inuse
;
1654 } else if (!conf
&& unconf
1655 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
1657 * RFC 3530 14.2.34 CASE 3:
1658 * Normal case; new or rebooted client:
1660 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
1661 status
= nfserr_clid_inuse
;
1664 clientstr_hashval(unconf
->cl_recdir
);
1665 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
1668 nfsd4_remove_clid_dir(conf
);
1669 expire_client(conf
);
1671 move_to_confirmed(unconf
);
1673 nfsd4_probe_callback(conf
);
1676 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
1677 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
1680 * RFC 3530 14.2.34 CASE 4:
1681 * Client probably hasn't noticed that we rebooted yet.
1683 status
= nfserr_stale_clientid
;
1685 /* check that we have hit one of the cases...*/
1686 status
= nfserr_clid_inuse
;
1689 nfs4_unlock_state();
1693 /* OPEN Share state helper functions */
1694 static inline struct nfs4_file
*
1695 alloc_init_file(struct inode
*ino
)
1697 struct nfs4_file
*fp
;
1698 unsigned int hashval
= file_hashval(ino
);
1700 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
1702 atomic_set(&fp
->fi_ref
, 1);
1703 INIT_LIST_HEAD(&fp
->fi_hash
);
1704 INIT_LIST_HEAD(&fp
->fi_stateids
);
1705 INIT_LIST_HEAD(&fp
->fi_delegations
);
1706 spin_lock(&recall_lock
);
1707 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
1708 spin_unlock(&recall_lock
);
1709 fp
->fi_inode
= igrab(ino
);
1710 fp
->fi_id
= current_fileid
++;
1711 fp
->fi_had_conflict
= false;
1718 nfsd4_free_slab(struct kmem_cache
**slab
)
1722 kmem_cache_destroy(*slab
);
1727 nfsd4_free_slabs(void)
1729 nfsd4_free_slab(&stateowner_slab
);
1730 nfsd4_free_slab(&file_slab
);
1731 nfsd4_free_slab(&stateid_slab
);
1732 nfsd4_free_slab(&deleg_slab
);
1736 nfsd4_init_slabs(void)
1738 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1739 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
1740 if (stateowner_slab
== NULL
)
1742 file_slab
= kmem_cache_create("nfsd4_files",
1743 sizeof(struct nfs4_file
), 0, 0, NULL
);
1744 if (file_slab
== NULL
)
1746 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1747 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
1748 if (stateid_slab
== NULL
)
1750 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1751 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
1752 if (deleg_slab
== NULL
)
1757 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1762 nfs4_free_stateowner(struct kref
*kref
)
1764 struct nfs4_stateowner
*sop
=
1765 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1766 kfree(sop
->so_owner
.data
);
1767 kmem_cache_free(stateowner_slab
, sop
);
1770 static inline struct nfs4_stateowner
*
1771 alloc_stateowner(struct xdr_netobj
*owner
)
1773 struct nfs4_stateowner
*sop
;
1775 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1776 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1777 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1778 sop
->so_owner
.len
= owner
->len
;
1779 kref_init(&sop
->so_ref
);
1782 kmem_cache_free(stateowner_slab
, sop
);
1787 static struct nfs4_stateowner
*
1788 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1789 struct nfs4_stateowner
*sop
;
1790 struct nfs4_replay
*rp
;
1791 unsigned int idhashval
;
1793 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1795 idhashval
= ownerid_hashval(current_ownerid
);
1796 INIT_LIST_HEAD(&sop
->so_idhash
);
1797 INIT_LIST_HEAD(&sop
->so_strhash
);
1798 INIT_LIST_HEAD(&sop
->so_perclient
);
1799 INIT_LIST_HEAD(&sop
->so_stateids
);
1800 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1801 INIT_LIST_HEAD(&sop
->so_close_lru
);
1803 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1804 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1805 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1806 sop
->so_is_open_owner
= 1;
1807 sop
->so_id
= current_ownerid
++;
1808 sop
->so_client
= clp
;
1809 sop
->so_seqid
= open
->op_seqid
;
1810 sop
->so_confirmed
= 0;
1811 rp
= &sop
->so_replay
;
1812 rp
->rp_status
= nfserr_serverfault
;
1814 rp
->rp_buf
= rp
->rp_ibuf
;
1819 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1820 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1821 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1823 INIT_LIST_HEAD(&stp
->st_hash
);
1824 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1825 INIT_LIST_HEAD(&stp
->st_lockowners
);
1826 INIT_LIST_HEAD(&stp
->st_perfile
);
1827 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1828 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1829 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1830 stp
->st_stateowner
= sop
;
1833 stp
->st_stateid
.si_boot
= get_seconds();
1834 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1835 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1836 stp
->st_stateid
.si_generation
= 0;
1837 stp
->st_access_bmap
= 0;
1838 stp
->st_deny_bmap
= 0;
1839 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
1840 &stp
->st_access_bmap
);
1841 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1842 stp
->st_openstp
= NULL
;
1846 move_to_close_lru(struct nfs4_stateowner
*sop
)
1848 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1850 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1851 sop
->so_time
= get_seconds();
1855 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1858 return (sop
->so_owner
.len
== owner
->len
) &&
1859 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1860 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1863 static struct nfs4_stateowner
*
1864 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1866 struct nfs4_stateowner
*so
= NULL
;
1868 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1869 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1875 /* search file_hashtbl[] for file */
1876 static struct nfs4_file
*
1877 find_file(struct inode
*ino
)
1879 unsigned int hashval
= file_hashval(ino
);
1880 struct nfs4_file
*fp
;
1882 spin_lock(&recall_lock
);
1883 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1884 if (fp
->fi_inode
== ino
) {
1886 spin_unlock(&recall_lock
);
1890 spin_unlock(&recall_lock
);
1894 static inline int access_valid(u32 x
, u32 minorversion
)
1896 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
1898 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
1900 x
&= ~NFS4_SHARE_ACCESS_MASK
;
1901 if (minorversion
&& x
) {
1902 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
1904 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
1906 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
1913 static inline int deny_valid(u32 x
)
1915 /* Note: unlike access bits, deny bits may be zero. */
1916 return x
<= NFS4_SHARE_DENY_BOTH
;
1920 * We store the NONE, READ, WRITE, and BOTH bits separately in the
1921 * st_{access,deny}_bmap field of the stateid, in order to track not
1922 * only what share bits are currently in force, but also what
1923 * combinations of share bits previous opens have used. This allows us
1924 * to enforce the recommendation of rfc 3530 14.2.19 that the server
1925 * return an error if the client attempt to downgrade to a combination
1926 * of share bits not explicable by closing some of its previous opens.
1928 * XXX: This enforcement is actually incomplete, since we don't keep
1929 * track of access/deny bit combinations; so, e.g., we allow:
1931 * OPEN allow read, deny write
1932 * OPEN allow both, deny none
1933 * DOWNGRADE allow read, deny none
1935 * which we should reject.
1938 set_access(unsigned int *access
, unsigned long bmap
) {
1942 for (i
= 1; i
< 4; i
++) {
1943 if (test_bit(i
, &bmap
))
1949 set_deny(unsigned int *deny
, unsigned long bmap
) {
1953 for (i
= 0; i
< 4; i
++) {
1954 if (test_bit(i
, &bmap
))
1960 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1961 unsigned int access
, deny
;
1963 set_access(&access
, stp
->st_access_bmap
);
1964 set_deny(&deny
, stp
->st_deny_bmap
);
1965 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1971 * Called to check deny when READ with all zero stateid or
1972 * WRITE with all zero or all one stateid
1975 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1977 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1978 struct nfs4_file
*fp
;
1979 struct nfs4_stateid
*stp
;
1982 dprintk("NFSD: nfs4_share_conflict\n");
1984 fp
= find_file(ino
);
1987 ret
= nfserr_locked
;
1988 /* Search for conflicting share reservations */
1989 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1990 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1991 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2001 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
2003 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
2004 drop_file_write_access(filp
);
2005 spin_lock(&filp
->f_lock
);
2006 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
2007 spin_unlock(&filp
->f_lock
);
2012 * Spawn a thread to perform a recall on the delegation represented
2013 * by the lease (file_lock)
2015 * Called from break_lease() with lock_kernel() held.
2016 * Note: we assume break_lease will only call this *once* for any given
2020 void nfsd_break_deleg_cb(struct file_lock
*fl
)
2022 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2024 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
2028 /* We're assuming the state code never drops its reference
2029 * without first removing the lease. Since we're in this lease
2030 * callback (and since the lease code is serialized by the kernel
2031 * lock) we know the server hasn't removed the lease yet, we know
2032 * it's safe to take a reference: */
2033 atomic_inc(&dp
->dl_count
);
2034 atomic_inc(&dp
->dl_client
->cl_count
);
2036 spin_lock(&recall_lock
);
2037 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2038 spin_unlock(&recall_lock
);
2040 /* only place dl_time is set. protected by lock_kernel*/
2041 dp
->dl_time
= get_seconds();
2044 * We don't want the locks code to timeout the lease for us;
2045 * we'll remove it ourself if the delegation isn't returned
2048 fl
->fl_break_time
= 0;
2050 dp
->dl_file
->fi_had_conflict
= true;
2051 nfsd4_cb_recall(dp
);
2055 * The file_lock is being reapd.
2057 * Called by locks_free_lock() with lock_kernel() held.
2060 void nfsd_release_deleg_cb(struct file_lock
*fl
)
2062 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2064 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
2066 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
2068 dp
->dl_flock
= NULL
;
2072 * Set the delegation file_lock back pointer.
2074 * Called from setlease() with lock_kernel() held.
2077 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
2079 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
2081 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
2088 * Called from setlease() with lock_kernel() held
2091 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
2093 struct nfs4_delegation
*onlistd
=
2094 (struct nfs4_delegation
*)onlist
->fl_owner
;
2095 struct nfs4_delegation
*tryd
=
2096 (struct nfs4_delegation
*)try->fl_owner
;
2098 if (onlist
->fl_lmops
!= try->fl_lmops
)
2101 return onlistd
->dl_client
== tryd
->dl_client
;
2106 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2109 return lease_modify(onlist
, arg
);
2114 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2115 .fl_break
= nfsd_break_deleg_cb
,
2116 .fl_release_private
= nfsd_release_deleg_cb
,
2117 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
2118 .fl_mylease
= nfsd_same_client_deleg_cb
,
2119 .fl_change
= nfsd_change_deleg_cb
,
2124 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2125 struct nfsd4_open
*open
)
2127 clientid_t
*clientid
= &open
->op_clientid
;
2128 struct nfs4_client
*clp
= NULL
;
2129 unsigned int strhashval
;
2130 struct nfs4_stateowner
*sop
= NULL
;
2132 if (!check_name(open
->op_owner
))
2133 return nfserr_inval
;
2135 if (STALE_CLIENTID(&open
->op_clientid
))
2136 return nfserr_stale_clientid
;
2138 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
2139 sop
= find_openstateowner_str(strhashval
, open
);
2140 open
->op_stateowner
= sop
;
2142 /* Make sure the client's lease hasn't expired. */
2143 clp
= find_confirmed_client(clientid
);
2145 return nfserr_expired
;
2148 /* When sessions are used, skip open sequenceid processing */
2149 if (nfsd4_has_session(cstate
))
2151 if (!sop
->so_confirmed
) {
2152 /* Replace unconfirmed owners without checking for replay. */
2153 clp
= sop
->so_client
;
2154 release_openowner(sop
);
2155 open
->op_stateowner
= NULL
;
2158 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2159 if (sop
->so_replay
.rp_buflen
)
2160 return nfserr_replay_me
;
2161 /* The original OPEN failed so spectacularly
2162 * that we don't even have replay data saved!
2163 * Therefore, we have no choice but to continue
2164 * processing this OPEN; presumably, we'll
2165 * fail again for the same reason.
2167 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2170 if (open
->op_seqid
!= sop
->so_seqid
)
2171 return nfserr_bad_seqid
;
2173 if (open
->op_stateowner
== NULL
) {
2174 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2176 return nfserr_resource
;
2177 open
->op_stateowner
= sop
;
2179 list_del_init(&sop
->so_close_lru
);
2180 renew_client(sop
->so_client
);
2184 static inline __be32
2185 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2187 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2188 return nfserr_openmode
;
2193 static struct nfs4_delegation
*
2194 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2196 struct nfs4_delegation
*dp
;
2198 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
2199 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
2206 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2207 struct nfs4_delegation
**dp
)
2210 __be32 status
= nfserr_bad_stateid
;
2212 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2215 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
2216 RD_STATE
: WR_STATE
;
2217 status
= nfs4_check_delegmode(*dp
, flags
);
2221 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2225 open
->op_stateowner
->so_confirmed
= 1;
2230 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2232 struct nfs4_stateid
*local
;
2233 __be32 status
= nfserr_share_denied
;
2234 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2236 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2237 /* ignore lock owners */
2238 if (local
->st_stateowner
->so_is_open_owner
== 0)
2240 /* remember if we have seen this open owner */
2241 if (local
->st_stateowner
== sop
)
2243 /* check for conflicting share reservations */
2244 if (!test_share(local
, open
))
2252 static inline struct nfs4_stateid
*
2253 nfs4_alloc_stateid(void)
2255 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2259 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2260 struct nfs4_delegation
*dp
,
2261 struct svc_fh
*cur_fh
, int flags
)
2263 struct nfs4_stateid
*stp
;
2265 stp
= nfs4_alloc_stateid();
2267 return nfserr_resource
;
2270 get_file(dp
->dl_vfs_file
);
2271 stp
->st_vfs_file
= dp
->dl_vfs_file
;
2274 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
2277 if (status
== nfserr_dropit
)
2278 status
= nfserr_jukebox
;
2279 kmem_cache_free(stateid_slab
, stp
);
2287 static inline __be32
2288 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2289 struct nfsd4_open
*open
)
2291 struct iattr iattr
= {
2292 .ia_valid
= ATTR_SIZE
,
2295 if (!open
->op_truncate
)
2297 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2298 return nfserr_inval
;
2299 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2303 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2305 struct file
*filp
= stp
->st_vfs_file
;
2306 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2307 unsigned int share_access
, new_writer
;
2310 set_access(&share_access
, stp
->st_access_bmap
);
2311 new_writer
= (~share_access
) & open
->op_share_access
2312 & NFS4_SHARE_ACCESS_WRITE
;
2315 int err
= get_write_access(inode
);
2317 return nfserrno(err
);
2318 err
= mnt_want_write(cur_fh
->fh_export
->ex_path
.mnt
);
2320 return nfserrno(err
);
2321 file_take_write(filp
);
2323 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2326 put_write_access(inode
);
2329 /* remember the open */
2330 filp
->f_mode
|= open
->op_share_access
;
2331 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
2332 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2339 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2341 open
->op_stateowner
->so_confirmed
= 1;
2342 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2346 * Attempt to hand out a delegation.
2349 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2351 struct nfs4_delegation
*dp
;
2352 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2353 struct nfs4_cb_conn
*cb
= &sop
->so_client
->cl_cb_conn
;
2354 struct file_lock fl
, *flp
= &fl
;
2355 int status
, flag
= 0;
2357 flag
= NFS4_OPEN_DELEGATE_NONE
;
2358 open
->op_recall
= 0;
2359 switch (open
->op_claim_type
) {
2360 case NFS4_OPEN_CLAIM_PREVIOUS
:
2361 if (!atomic_read(&cb
->cb_set
))
2362 open
->op_recall
= 1;
2363 flag
= open
->op_delegate_type
;
2364 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2367 case NFS4_OPEN_CLAIM_NULL
:
2368 /* Let's not give out any delegations till everyone's
2369 * had the chance to reclaim theirs.... */
2370 if (locks_in_grace())
2372 if (!atomic_read(&cb
->cb_set
) || !sop
->so_confirmed
)
2374 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2375 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2377 flag
= NFS4_OPEN_DELEGATE_READ
;
2383 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2385 flag
= NFS4_OPEN_DELEGATE_NONE
;
2388 locks_init_lock(&fl
);
2389 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
2390 fl
.fl_flags
= FL_LEASE
;
2391 fl
.fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2392 fl
.fl_end
= OFFSET_MAX
;
2393 fl
.fl_owner
= (fl_owner_t
)dp
;
2394 fl
.fl_file
= stp
->st_vfs_file
;
2395 fl
.fl_pid
= current
->tgid
;
2397 /* vfs_setlease checks to see if delegation should be handed out.
2398 * the lock_manager callbacks fl_mylease and fl_change are used
2400 if ((status
= vfs_setlease(stp
->st_vfs_file
, fl
.fl_type
, &flp
))) {
2401 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
2402 unhash_delegation(dp
);
2403 flag
= NFS4_OPEN_DELEGATE_NONE
;
2407 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2409 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
2410 dp
->dl_stateid
.si_boot
,
2411 dp
->dl_stateid
.si_stateownerid
,
2412 dp
->dl_stateid
.si_fileid
,
2413 dp
->dl_stateid
.si_generation
);
2415 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2416 && flag
== NFS4_OPEN_DELEGATE_NONE
2417 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2418 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2419 open
->op_delegate_type
= flag
;
2423 * called with nfs4_lock_state() held.
2426 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2428 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2429 struct nfs4_file
*fp
= NULL
;
2430 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2431 struct nfs4_stateid
*stp
= NULL
;
2432 struct nfs4_delegation
*dp
= NULL
;
2435 status
= nfserr_inval
;
2436 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2437 || !deny_valid(open
->op_share_deny
))
2440 * Lookup file; if found, lookup stateid and check open request,
2441 * and check for delegations in the process of being recalled.
2442 * If not found, create the nfs4_file struct
2444 fp
= find_file(ino
);
2446 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2448 status
= nfs4_check_deleg(fp
, open
, &dp
);
2452 status
= nfserr_bad_stateid
;
2453 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2455 status
= nfserr_resource
;
2456 fp
= alloc_init_file(ino
);
2462 * OPEN the file, or upgrade an existing OPEN.
2463 * If truncate fails, the OPEN fails.
2466 /* Stateid was found, this is an OPEN upgrade */
2467 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
2470 update_stateid(&stp
->st_stateid
);
2472 /* Stateid was not found, this is a new OPEN */
2474 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
2475 flags
|= NFSD_MAY_READ
;
2476 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2477 flags
|= NFSD_MAY_WRITE
;
2478 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
2481 init_stateid(stp
, fp
, open
);
2482 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2484 release_open_stateid(stp
);
2487 if (nfsd4_has_session(&resp
->cstate
))
2488 update_stateid(&stp
->st_stateid
);
2490 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2492 if (nfsd4_has_session(&resp
->cstate
))
2493 open
->op_stateowner
->so_confirmed
= 1;
2496 * Attempt to hand out a delegation. No error return, because the
2497 * OPEN succeeds even if we fail.
2499 nfs4_open_delegation(current_fh
, open
, stp
);
2503 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
2504 stp
->st_stateid
.si_boot
, stp
->st_stateid
.si_stateownerid
,
2505 stp
->st_stateid
.si_fileid
, stp
->st_stateid
.si_generation
);
2509 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2510 nfs4_set_claim_prev(open
);
2512 * To finish the open response, we just need to set the rflags.
2514 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2515 if (!open
->op_stateowner
->so_confirmed
&&
2516 !nfsd4_has_session(&resp
->cstate
))
2517 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2523 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2526 struct nfs4_client
*clp
;
2530 dprintk("process_renew(%08x/%08x): starting\n",
2531 clid
->cl_boot
, clid
->cl_id
);
2532 status
= nfserr_stale_clientid
;
2533 if (STALE_CLIENTID(clid
))
2535 clp
= find_confirmed_client(clid
);
2536 status
= nfserr_expired
;
2538 /* We assume the client took too long to RENEW. */
2539 dprintk("nfsd4_renew: clientid not found!\n");
2543 status
= nfserr_cb_path_down
;
2544 if (!list_empty(&clp
->cl_delegations
)
2545 && !atomic_read(&clp
->cl_cb_conn
.cb_set
))
2549 nfs4_unlock_state();
2553 struct lock_manager nfsd4_manager
= {
2557 nfsd4_end_grace(void)
2559 dprintk("NFSD: end of grace period\n");
2560 nfsd4_recdir_purge_old();
2561 locks_end_grace(&nfsd4_manager
);
2565 nfs4_laundromat(void)
2567 struct nfs4_client
*clp
;
2568 struct nfs4_stateowner
*sop
;
2569 struct nfs4_delegation
*dp
;
2570 struct list_head
*pos
, *next
, reaplist
;
2571 time_t cutoff
= get_seconds() - NFSD_LEASE_TIME
;
2572 time_t t
, clientid_val
= NFSD_LEASE_TIME
;
2573 time_t u
, test_val
= NFSD_LEASE_TIME
;
2577 dprintk("NFSD: laundromat service - starting\n");
2578 if (locks_in_grace())
2580 list_for_each_safe(pos
, next
, &client_lru
) {
2581 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2582 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
2583 t
= clp
->cl_time
- cutoff
;
2584 if (clientid_val
> t
)
2588 dprintk("NFSD: purging unused client (clientid %08x)\n",
2589 clp
->cl_clientid
.cl_id
);
2590 nfsd4_remove_clid_dir(clp
);
2593 INIT_LIST_HEAD(&reaplist
);
2594 spin_lock(&recall_lock
);
2595 list_for_each_safe(pos
, next
, &del_recall_lru
) {
2596 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2597 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
2598 u
= dp
->dl_time
- cutoff
;
2603 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
2605 list_move(&dp
->dl_recall_lru
, &reaplist
);
2607 spin_unlock(&recall_lock
);
2608 list_for_each_safe(pos
, next
, &reaplist
) {
2609 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2610 list_del_init(&dp
->dl_recall_lru
);
2611 unhash_delegation(dp
);
2613 test_val
= NFSD_LEASE_TIME
;
2614 list_for_each_safe(pos
, next
, &close_lru
) {
2615 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
2616 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
2617 u
= sop
->so_time
- cutoff
;
2622 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2624 release_openowner(sop
);
2626 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
2627 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
2628 nfs4_unlock_state();
2629 return clientid_val
;
2632 static struct workqueue_struct
*laundry_wq
;
2633 static void laundromat_main(struct work_struct
*);
2634 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
2637 laundromat_main(struct work_struct
*not_used
)
2641 t
= nfs4_laundromat();
2642 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2643 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2646 static struct nfs4_stateowner
*
2647 search_close_lru(u32 st_id
, int flags
)
2649 struct nfs4_stateowner
*local
= NULL
;
2651 if (flags
& CLOSE_STATE
) {
2652 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
2653 if (local
->so_id
== st_id
)
2661 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2663 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
2667 STALE_STATEID(stateid_t
*stateid
)
2669 if (time_after((unsigned long)boot_time
,
2670 (unsigned long)stateid
->si_boot
)) {
2671 dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2672 stateid
->si_boot
, stateid
->si_stateownerid
,
2673 stateid
->si_fileid
, stateid
->si_generation
);
2680 EXPIRED_STATEID(stateid_t
*stateid
)
2682 if (time_before((unsigned long)boot_time
,
2683 ((unsigned long)stateid
->si_boot
)) &&
2684 time_before((unsigned long)(stateid
->si_boot
+ lease_time
), get_seconds())) {
2685 dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n",
2686 stateid
->si_boot
, stateid
->si_stateownerid
,
2687 stateid
->si_fileid
, stateid
->si_generation
);
2694 stateid_error_map(stateid_t
*stateid
)
2696 if (STALE_STATEID(stateid
))
2697 return nfserr_stale_stateid
;
2698 if (EXPIRED_STATEID(stateid
))
2699 return nfserr_expired
;
2701 dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n",
2702 stateid
->si_boot
, stateid
->si_stateownerid
,
2703 stateid
->si_fileid
, stateid
->si_generation
);
2704 return nfserr_bad_stateid
;
2708 access_permit_read(unsigned long access_bmap
)
2710 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2711 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2712 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2716 access_permit_write(unsigned long access_bmap
)
2718 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2719 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2723 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2725 __be32 status
= nfserr_openmode
;
2727 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2729 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2736 static inline __be32
2737 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2739 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2741 else if (locks_in_grace()) {
2742 /* Answer in remaining cases depends on existance of
2743 * conflicting state; so we must wait out the grace period. */
2744 return nfserr_grace
;
2745 } else if (flags
& WR_STATE
)
2746 return nfs4_share_conflict(current_fh
,
2747 NFS4_SHARE_DENY_WRITE
);
2748 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2749 return nfs4_share_conflict(current_fh
,
2750 NFS4_SHARE_DENY_READ
);
2754 * Allow READ/WRITE during grace period on recovered state only for files
2755 * that are not able to provide mandatory locking.
2758 grace_disallows_io(struct inode
*inode
)
2760 return locks_in_grace() && mandatory_lock(inode
);
2763 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, int flags
)
2766 * When sessions are used the stateid generation number is ignored
2769 if ((flags
& HAS_SESSION
) && in
->si_generation
== 0)
2772 /* If the client sends us a stateid from the future, it's buggy: */
2773 if (in
->si_generation
> ref
->si_generation
)
2774 return nfserr_bad_stateid
;
2776 * The following, however, can happen. For example, if the
2777 * client sends an open and some IO at the same time, the open
2778 * may bump si_generation while the IO is still in flight.
2779 * Thanks to hard links and renames, the client never knows what
2780 * file an open will affect. So it could avoid that situation
2781 * only by serializing all opens and IO from the same open
2782 * owner. To recover from the old_stateid error, the client
2783 * will just have to retry the IO:
2785 if (in
->si_generation
< ref
->si_generation
)
2786 return nfserr_old_stateid
;
2791 static int is_delegation_stateid(stateid_t
*stateid
)
2793 return stateid
->si_fileid
== 0;
2797 * Checks for stateid operations
2800 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
2801 stateid_t
*stateid
, int flags
, struct file
**filpp
)
2803 struct nfs4_stateid
*stp
= NULL
;
2804 struct nfs4_delegation
*dp
= NULL
;
2805 struct svc_fh
*current_fh
= &cstate
->current_fh
;
2806 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2812 if (grace_disallows_io(ino
))
2813 return nfserr_grace
;
2815 if (nfsd4_has_session(cstate
))
2816 flags
|= HAS_SESSION
;
2818 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2819 return check_special_stateids(current_fh
, stateid
, flags
);
2821 status
= nfserr_stale_stateid
;
2822 if (STALE_STATEID(stateid
))
2825 status
= nfserr_bad_stateid
;
2826 if (is_delegation_stateid(stateid
)) {
2827 dp
= find_delegation_stateid(ino
, stateid
);
2829 status
= stateid_error_map(stateid
);
2832 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
,
2836 status
= nfs4_check_delegmode(dp
, flags
);
2839 renew_client(dp
->dl_client
);
2841 *filpp
= dp
->dl_vfs_file
;
2842 } else { /* open or lock stateid */
2843 stp
= find_stateid(stateid
, flags
);
2845 status
= stateid_error_map(stateid
);
2848 if (nfs4_check_fh(current_fh
, stp
))
2850 if (!stp
->st_stateowner
->so_confirmed
)
2852 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
2856 status
= nfs4_check_openmode(stp
, flags
);
2859 renew_client(stp
->st_stateowner
->so_client
);
2861 *filpp
= stp
->st_vfs_file
;
2871 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2872 RD_STATE
: WR_STATE
;
2876 * Checks for sequence id mutating operations.
2879 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
2880 stateid_t
*stateid
, int flags
,
2881 struct nfs4_stateowner
**sopp
,
2882 struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
2884 struct nfs4_stateid
*stp
;
2885 struct nfs4_stateowner
*sop
;
2886 struct svc_fh
*current_fh
= &cstate
->current_fh
;
2889 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2890 "stateid = (%08x/%08x/%08x/%08x)\n", seqid
,
2891 stateid
->si_boot
, stateid
->si_stateownerid
, stateid
->si_fileid
,
2892 stateid
->si_generation
);
2897 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2898 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2899 return nfserr_bad_stateid
;
2902 if (STALE_STATEID(stateid
))
2903 return nfserr_stale_stateid
;
2905 if (nfsd4_has_session(cstate
))
2906 flags
|= HAS_SESSION
;
2909 * We return BAD_STATEID if filehandle doesn't match stateid,
2910 * the confirmed flag is incorrecly set, or the generation
2911 * number is incorrect.
2913 stp
= find_stateid(stateid
, flags
);
2916 * Also, we should make sure this isn't just the result of
2919 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2921 return stateid_error_map(stateid
);
2927 *sopp
= sop
= stp
->st_stateowner
;
2930 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2931 struct nfs4_client
*clp
= sop
->so_client
;
2935 lkflg
= setlkflg(lock
->lk_type
);
2937 if (lock
->lk_is_new
) {
2938 if (!sop
->so_is_open_owner
)
2939 return nfserr_bad_stateid
;
2940 if (!(flags
& HAS_SESSION
) &&
2941 !same_clid(&clp
->cl_clientid
, lockclid
))
2942 return nfserr_bad_stateid
;
2943 /* stp is the open stateid */
2944 status
= nfs4_check_openmode(stp
, lkflg
);
2948 /* stp is the lock stateid */
2949 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2955 if (nfs4_check_fh(current_fh
, stp
)) {
2956 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2957 return nfserr_bad_stateid
;
2961 * We now validate the seqid and stateid generation numbers.
2962 * For the moment, we ignore the possibility of
2963 * generation number wraparound.
2965 if (!(flags
& HAS_SESSION
) && seqid
!= sop
->so_seqid
)
2968 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2969 dprintk("NFSD: preprocess_seqid_op: expected"
2970 " unconfirmed stateowner!\n");
2971 return nfserr_bad_stateid
;
2973 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2974 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2975 " confirmed yet!\n");
2976 return nfserr_bad_stateid
;
2978 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, flags
);
2981 renew_client(sop
->so_client
);
2985 if (seqid
== sop
->so_seqid
- 1) {
2986 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2987 /* indicate replay to calling function */
2988 return nfserr_replay_me
;
2990 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2991 sop
->so_seqid
, seqid
);
2993 return nfserr_bad_seqid
;
2997 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2998 struct nfsd4_open_confirm
*oc
)
3001 struct nfs4_stateowner
*sop
;
3002 struct nfs4_stateid
*stp
;
3004 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3005 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3006 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3008 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3014 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3015 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3016 CONFIRM
| OPEN_STATE
,
3017 &oc
->oc_stateowner
, &stp
, NULL
)))
3020 sop
= oc
->oc_stateowner
;
3021 sop
->so_confirmed
= 1;
3022 update_stateid(&stp
->st_stateid
);
3023 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3024 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
3025 "stateid=(%08x/%08x/%08x/%08x)\n", oc
->oc_seqid
,
3026 stp
->st_stateid
.si_boot
,
3027 stp
->st_stateid
.si_stateownerid
,
3028 stp
->st_stateid
.si_fileid
,
3029 stp
->st_stateid
.si_generation
);
3031 nfsd4_create_clid_dir(sop
->so_client
);
3033 if (oc
->oc_stateowner
) {
3034 nfs4_get_stateowner(oc
->oc_stateowner
);
3035 cstate
->replay_owner
= oc
->oc_stateowner
;
3037 nfs4_unlock_state();
3043 * unset all bits in union bitmap (bmap) that
3044 * do not exist in share (from successful OPEN_DOWNGRADE)
3047 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
3050 for (i
= 1; i
< 4; i
++) {
3051 if ((i
& access
) != i
)
3052 __clear_bit(i
, bmap
);
3057 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3060 for (i
= 0; i
< 4; i
++) {
3061 if ((i
& deny
) != i
)
3062 __clear_bit(i
, bmap
);
3067 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3068 struct nfsd4_compound_state
*cstate
,
3069 struct nfsd4_open_downgrade
*od
)
3072 struct nfs4_stateid
*stp
;
3073 unsigned int share_access
;
3075 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3076 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3077 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3079 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3080 || !deny_valid(od
->od_share_deny
))
3081 return nfserr_inval
;
3082 /* We don't yet support WANT bits: */
3083 od
->od_share_access
&= NFS4_SHARE_ACCESS_MASK
;
3086 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3090 &od
->od_stateowner
, &stp
, NULL
)))
3093 status
= nfserr_inval
;
3094 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3095 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3096 stp
->st_access_bmap
, od
->od_share_access
);
3099 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3100 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3101 stp
->st_deny_bmap
, od
->od_share_deny
);
3104 set_access(&share_access
, stp
->st_access_bmap
);
3105 nfs4_file_downgrade(stp
->st_vfs_file
,
3106 share_access
& ~od
->od_share_access
);
3108 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
3109 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3111 update_stateid(&stp
->st_stateid
);
3112 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3115 if (od
->od_stateowner
) {
3116 nfs4_get_stateowner(od
->od_stateowner
);
3117 cstate
->replay_owner
= od
->od_stateowner
;
3119 nfs4_unlock_state();
3124 * nfs4_unlock_state() called after encode
3127 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3128 struct nfsd4_close
*close
)
3131 struct nfs4_stateid
*stp
;
3133 dprintk("NFSD: nfsd4_close on file %.*s\n",
3134 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3135 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3138 /* check close_lru for replay */
3139 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3142 OPEN_STATE
| CLOSE_STATE
,
3143 &close
->cl_stateowner
, &stp
, NULL
)))
3146 update_stateid(&stp
->st_stateid
);
3147 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3149 /* release_stateid() calls nfsd_close() if needed */
3150 release_open_stateid(stp
);
3152 /* place unused nfs4_stateowners on so_close_lru list to be
3153 * released by the laundromat service after the lease period
3154 * to enable us to handle CLOSE replay
3156 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3157 move_to_close_lru(close
->cl_stateowner
);
3159 if (close
->cl_stateowner
) {
3160 nfs4_get_stateowner(close
->cl_stateowner
);
3161 cstate
->replay_owner
= close
->cl_stateowner
;
3163 nfs4_unlock_state();
3168 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3169 struct nfsd4_delegreturn
*dr
)
3171 struct nfs4_delegation
*dp
;
3172 stateid_t
*stateid
= &dr
->dr_stateid
;
3173 struct inode
*inode
;
3177 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3179 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3181 if (nfsd4_has_session(cstate
))
3182 flags
|= HAS_SESSION
;
3184 status
= nfserr_bad_stateid
;
3185 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3187 status
= nfserr_stale_stateid
;
3188 if (STALE_STATEID(stateid
))
3190 status
= nfserr_bad_stateid
;
3191 if (!is_delegation_stateid(stateid
))
3193 dp
= find_delegation_stateid(inode
, stateid
);
3195 status
= stateid_error_map(stateid
);
3198 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, flags
);
3201 renew_client(dp
->dl_client
);
3203 unhash_delegation(dp
);
3205 nfs4_unlock_state();
3212 * Lock owner state (byte-range locks)
3214 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3215 #define LOCK_HASH_BITS 8
3216 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3217 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3220 end_offset(u64 start
, u64 len
)
3225 return end
>= start
? end
: NFS4_MAX_UINT64
;
3228 /* last octet in a range */
3230 last_byte_offset(u64 start
, u64 len
)
3236 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3239 #define lockownerid_hashval(id) \
3240 ((id) & LOCK_HASH_MASK)
3242 static inline unsigned int
3243 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3244 struct xdr_netobj
*ownername
)
3246 return (file_hashval(inode
) + cl_id
3247 + opaque_hashval(ownername
->data
, ownername
->len
))
3251 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3252 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3253 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3255 static struct nfs4_stateid
*
3256 find_stateid(stateid_t
*stid
, int flags
)
3258 struct nfs4_stateid
*local
;
3259 u32 st_id
= stid
->si_stateownerid
;
3260 u32 f_id
= stid
->si_fileid
;
3261 unsigned int hashval
;
3263 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3264 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3265 hashval
= stateid_hashval(st_id
, f_id
);
3266 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3267 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3268 (local
->st_stateid
.si_fileid
== f_id
))
3273 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3274 hashval
= stateid_hashval(st_id
, f_id
);
3275 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3276 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3277 (local
->st_stateid
.si_fileid
== f_id
))
3284 static struct nfs4_delegation
*
3285 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3287 struct nfs4_file
*fp
;
3288 struct nfs4_delegation
*dl
;
3290 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
3291 stid
->si_boot
, stid
->si_stateownerid
,
3292 stid
->si_fileid
, stid
->si_generation
);
3294 fp
= find_file(ino
);
3297 dl
= find_delegation_file(fp
, stid
);
3303 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3304 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3305 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3306 * locking, this prevents us from being completely protocol-compliant. The
3307 * real solution to this problem is to start using unsigned file offsets in
3308 * the VFS, but this is a very deep change!
3311 nfs4_transform_lock_offset(struct file_lock
*lock
)
3313 if (lock
->fl_start
< 0)
3314 lock
->fl_start
= OFFSET_MAX
;
3315 if (lock
->fl_end
< 0)
3316 lock
->fl_end
= OFFSET_MAX
;
3319 /* Hack!: For now, we're defining this just so we can use a pointer to it
3320 * as a unique cookie to identify our (NFSv4's) posix locks. */
3321 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3325 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3327 struct nfs4_stateowner
*sop
;
3330 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3331 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3332 hval
= lockownerid_hashval(sop
->so_id
);
3333 kref_get(&sop
->so_ref
);
3335 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3337 deny
->ld_sop
= NULL
;
3338 deny
->ld_clientid
.cl_boot
= 0;
3339 deny
->ld_clientid
.cl_id
= 0;
3341 deny
->ld_start
= fl
->fl_start
;
3342 deny
->ld_length
= NFS4_MAX_UINT64
;
3343 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3344 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3345 deny
->ld_type
= NFS4_READ_LT
;
3346 if (fl
->fl_type
!= F_RDLCK
)
3347 deny
->ld_type
= NFS4_WRITE_LT
;
3350 static struct nfs4_stateowner
*
3351 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3352 struct xdr_netobj
*owner
)
3354 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3355 struct nfs4_stateowner
*op
;
3357 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3358 if (same_owner_str(op
, owner
, clid
))
3365 * Alloc a lock owner structure.
3366 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3369 * strhashval = lock_ownerstr_hashval
3372 static struct nfs4_stateowner
*
3373 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3374 struct nfs4_stateowner
*sop
;
3375 struct nfs4_replay
*rp
;
3376 unsigned int idhashval
;
3378 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
3380 idhashval
= lockownerid_hashval(current_ownerid
);
3381 INIT_LIST_HEAD(&sop
->so_idhash
);
3382 INIT_LIST_HEAD(&sop
->so_strhash
);
3383 INIT_LIST_HEAD(&sop
->so_perclient
);
3384 INIT_LIST_HEAD(&sop
->so_stateids
);
3385 INIT_LIST_HEAD(&sop
->so_perstateid
);
3386 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
3388 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3389 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3390 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3391 sop
->so_is_open_owner
= 0;
3392 sop
->so_id
= current_ownerid
++;
3393 sop
->so_client
= clp
;
3394 /* It is the openowner seqid that will be incremented in encode in the
3395 * case of new lockowners; so increment the lock seqid manually: */
3396 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3397 sop
->so_confirmed
= 1;
3398 rp
= &sop
->so_replay
;
3399 rp
->rp_status
= nfserr_serverfault
;
3401 rp
->rp_buf
= rp
->rp_ibuf
;
3405 static struct nfs4_stateid
*
3406 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3408 struct nfs4_stateid
*stp
;
3409 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3411 stp
= nfs4_alloc_stateid();
3414 INIT_LIST_HEAD(&stp
->st_hash
);
3415 INIT_LIST_HEAD(&stp
->st_perfile
);
3416 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3417 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3418 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3419 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3420 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3421 stp
->st_stateowner
= sop
;
3424 stp
->st_stateid
.si_boot
= get_seconds();
3425 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3426 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3427 stp
->st_stateid
.si_generation
= 0;
3428 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
3429 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
3430 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3431 stp
->st_openstp
= open_stp
;
3438 check_lock_length(u64 offset
, u64 length
)
3440 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3441 LOFF_OVERFLOW(offset
, length
)));
3448 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3449 struct nfsd4_lock
*lock
)
3451 struct nfs4_stateowner
*open_sop
= NULL
;
3452 struct nfs4_stateowner
*lock_sop
= NULL
;
3453 struct nfs4_stateid
*lock_stp
;
3455 struct file_lock file_lock
;
3456 struct file_lock conflock
;
3458 unsigned int strhashval
;
3462 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3463 (long long) lock
->lk_offset
,
3464 (long long) lock
->lk_length
);
3466 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3467 return nfserr_inval
;
3469 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3470 S_IFREG
, NFSD_MAY_LOCK
))) {
3471 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3477 if (lock
->lk_is_new
) {
3479 * Client indicates that this is a new lockowner.
3480 * Use open owner and open stateid to create lock owner and
3483 struct nfs4_stateid
*open_stp
= NULL
;
3484 struct nfs4_file
*fp
;
3486 status
= nfserr_stale_clientid
;
3487 if (!nfsd4_has_session(cstate
) &&
3488 STALE_CLIENTID(&lock
->lk_new_clientid
))
3491 /* validate and update open stateid and open seqid */
3492 status
= nfs4_preprocess_seqid_op(cstate
,
3493 lock
->lk_new_open_seqid
,
3494 &lock
->lk_new_open_stateid
,
3496 &lock
->lk_replay_owner
, &open_stp
,
3500 open_sop
= lock
->lk_replay_owner
;
3501 /* create lockowner and lock stateid */
3502 fp
= open_stp
->st_file
;
3503 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3504 open_sop
->so_client
->cl_clientid
.cl_id
,
3505 &lock
->v
.new.owner
);
3506 /* XXX: Do we need to check for duplicate stateowners on
3507 * the same file, or should they just be allowed (and
3508 * create new stateids)? */
3509 status
= nfserr_resource
;
3510 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3511 open_sop
->so_client
, open_stp
, lock
);
3512 if (lock_sop
== NULL
)
3514 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3515 if (lock_stp
== NULL
)
3518 /* lock (lock owner + lock stateid) already exists */
3519 status
= nfs4_preprocess_seqid_op(cstate
,
3520 lock
->lk_old_lock_seqid
,
3521 &lock
->lk_old_lock_stateid
,
3523 &lock
->lk_replay_owner
, &lock_stp
, lock
);
3526 lock_sop
= lock
->lk_replay_owner
;
3528 /* lock->lk_replay_owner and lock_stp have been created or found */
3529 filp
= lock_stp
->st_vfs_file
;
3531 status
= nfserr_grace
;
3532 if (locks_in_grace() && !lock
->lk_reclaim
)
3534 status
= nfserr_no_grace
;
3535 if (!locks_in_grace() && lock
->lk_reclaim
)
3538 locks_init_lock(&file_lock
);
3539 switch (lock
->lk_type
) {
3542 file_lock
.fl_type
= F_RDLCK
;
3546 case NFS4_WRITEW_LT
:
3547 file_lock
.fl_type
= F_WRLCK
;
3551 status
= nfserr_inval
;
3554 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3555 file_lock
.fl_pid
= current
->tgid
;
3556 file_lock
.fl_file
= filp
;
3557 file_lock
.fl_flags
= FL_POSIX
;
3558 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3560 file_lock
.fl_start
= lock
->lk_offset
;
3561 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3562 nfs4_transform_lock_offset(&file_lock
);
3565 * Try to lock the file in the VFS.
3566 * Note: locks.c uses the BKL to protect the inode's lock list.
3569 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
3571 case 0: /* success! */
3572 update_stateid(&lock_stp
->st_stateid
);
3573 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
3577 case (EAGAIN
): /* conflock holds conflicting lock */
3578 status
= nfserr_denied
;
3579 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3580 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3583 status
= nfserr_deadlock
;
3586 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3587 status
= nfserr_resource
;
3591 if (status
&& lock
->lk_is_new
&& lock_sop
)
3592 release_lockowner(lock_sop
);
3593 if (lock
->lk_replay_owner
) {
3594 nfs4_get_stateowner(lock
->lk_replay_owner
);
3595 cstate
->replay_owner
= lock
->lk_replay_owner
;
3597 nfs4_unlock_state();
3602 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3603 * so we do a temporary open here just to get an open file to pass to
3604 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3607 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
3612 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
3615 err
= vfs_test_lock(file
, lock
);
3624 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3625 struct nfsd4_lockt
*lockt
)
3627 struct inode
*inode
;
3628 struct file_lock file_lock
;
3632 if (locks_in_grace())
3633 return nfserr_grace
;
3635 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
3636 return nfserr_inval
;
3638 lockt
->lt_stateowner
= NULL
;
3641 status
= nfserr_stale_clientid
;
3642 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
3645 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
3646 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
3647 if (status
== nfserr_symlink
)
3648 status
= nfserr_inval
;
3652 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3653 locks_init_lock(&file_lock
);
3654 switch (lockt
->lt_type
) {
3657 file_lock
.fl_type
= F_RDLCK
;
3660 case NFS4_WRITEW_LT
:
3661 file_lock
.fl_type
= F_WRLCK
;
3664 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
3665 status
= nfserr_inval
;
3669 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
3670 &lockt
->lt_clientid
, &lockt
->lt_owner
);
3671 if (lockt
->lt_stateowner
)
3672 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
3673 file_lock
.fl_pid
= current
->tgid
;
3674 file_lock
.fl_flags
= FL_POSIX
;
3676 file_lock
.fl_start
= lockt
->lt_offset
;
3677 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
3679 nfs4_transform_lock_offset(&file_lock
);
3682 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
3684 status
= nfserrno(error
);
3687 if (file_lock
.fl_type
!= F_UNLCK
) {
3688 status
= nfserr_denied
;
3689 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
3692 nfs4_unlock_state();
3697 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3698 struct nfsd4_locku
*locku
)
3700 struct nfs4_stateid
*stp
;
3701 struct file
*filp
= NULL
;
3702 struct file_lock file_lock
;
3706 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
3707 (long long) locku
->lu_offset
,
3708 (long long) locku
->lu_length
);
3710 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
3711 return nfserr_inval
;
3715 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3719 &locku
->lu_stateowner
, &stp
, NULL
)))
3722 filp
= stp
->st_vfs_file
;
3724 locks_init_lock(&file_lock
);
3725 file_lock
.fl_type
= F_UNLCK
;
3726 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
3727 file_lock
.fl_pid
= current
->tgid
;
3728 file_lock
.fl_file
= filp
;
3729 file_lock
.fl_flags
= FL_POSIX
;
3730 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3731 file_lock
.fl_start
= locku
->lu_offset
;
3733 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
3734 nfs4_transform_lock_offset(&file_lock
);
3737 * Try to unlock the file in the VFS.
3739 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
3741 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
3745 * OK, unlock succeeded; the only thing left to do is update the stateid.
3747 update_stateid(&stp
->st_stateid
);
3748 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3751 if (locku
->lu_stateowner
) {
3752 nfs4_get_stateowner(locku
->lu_stateowner
);
3753 cstate
->replay_owner
= locku
->lu_stateowner
;
3755 nfs4_unlock_state();
3759 status
= nfserrno(err
);
3765 * 1: locks held by lockowner
3766 * 0: no locks held by lockowner
3769 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3771 struct file_lock
**flpp
;
3772 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
3776 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3777 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
3788 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
3789 struct nfsd4_compound_state
*cstate
,
3790 struct nfsd4_release_lockowner
*rlockowner
)
3792 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3793 struct nfs4_stateowner
*sop
;
3794 struct nfs4_stateid
*stp
;
3795 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3796 struct list_head matches
;
3800 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3801 clid
->cl_boot
, clid
->cl_id
);
3803 /* XXX check for lease expiration */
3805 status
= nfserr_stale_clientid
;
3806 if (STALE_CLIENTID(clid
))
3811 status
= nfserr_locks_held
;
3812 /* XXX: we're doing a linear search through all the lockowners.
3813 * Yipes! For now we'll just hope clients aren't really using
3814 * release_lockowner much, but eventually we have to fix these
3815 * data structures. */
3816 INIT_LIST_HEAD(&matches
);
3817 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3818 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
3819 if (!same_owner_str(sop
, owner
, clid
))
3821 list_for_each_entry(stp
, &sop
->so_stateids
,
3823 if (check_for_locks(stp
->st_vfs_file
, sop
))
3825 /* Note: so_perclient unused for lockowners,
3826 * so it's OK to fool with here. */
3827 list_add(&sop
->so_perclient
, &matches
);
3831 /* Clients probably won't expect us to return with some (but not all)
3832 * of the lockowner state released; so don't release any until all
3833 * have been checked. */
3835 while (!list_empty(&matches
)) {
3836 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
3838 /* unhash_stateowner deletes so_perclient only
3839 * for openowners. */
3840 list_del(&sop
->so_perclient
);
3841 release_lockowner(sop
);
3844 nfs4_unlock_state();
3848 static inline struct nfs4_client_reclaim
*
3851 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3855 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
3857 unsigned int strhashval
= clientstr_hashval(name
);
3858 struct nfs4_client
*clp
;
3860 clp
= find_confirmed_client_by_str(name
, strhashval
, use_exchange_id
);
3865 * failure => all reset bets are off, nfserr_no_grace...
3868 nfs4_client_to_reclaim(const char *name
)
3870 unsigned int strhashval
;
3871 struct nfs4_client_reclaim
*crp
= NULL
;
3873 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3874 crp
= alloc_reclaim();
3877 strhashval
= clientstr_hashval(name
);
3878 INIT_LIST_HEAD(&crp
->cr_strhash
);
3879 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3880 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3881 reclaim_str_hashtbl_size
++;
3886 nfs4_release_reclaim(void)
3888 struct nfs4_client_reclaim
*crp
= NULL
;
3891 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3892 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3893 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3894 struct nfs4_client_reclaim
, cr_strhash
);
3895 list_del(&crp
->cr_strhash
);
3897 reclaim_str_hashtbl_size
--;
3900 BUG_ON(reclaim_str_hashtbl_size
);
3904 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3905 static struct nfs4_client_reclaim
*
3906 nfs4_find_reclaim_client(clientid_t
*clid
)
3908 unsigned int strhashval
;
3909 struct nfs4_client
*clp
;
3910 struct nfs4_client_reclaim
*crp
= NULL
;
3913 /* find clientid in conf_id_hashtbl */
3914 clp
= find_confirmed_client(clid
);
3918 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3919 clp
->cl_name
.len
, clp
->cl_name
.data
,
3922 /* find clp->cl_name in reclaim_str_hashtbl */
3923 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3924 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3925 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3933 * Called from OPEN. Look for clientid in reclaim list.
3936 nfs4_check_open_reclaim(clientid_t
*clid
)
3938 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3941 /* initialization to perform at module load time: */
3944 nfs4_state_init(void)
3948 status
= nfsd4_init_slabs();
3951 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3952 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3953 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3954 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3955 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3956 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3958 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
3959 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
3960 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3961 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3963 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3964 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3965 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3967 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3968 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3969 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3971 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3972 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3973 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3975 memset(&onestateid
, ~0, sizeof(stateid_t
));
3976 INIT_LIST_HEAD(&close_lru
);
3977 INIT_LIST_HEAD(&client_lru
);
3978 INIT_LIST_HEAD(&del_recall_lru
);
3979 reclaim_str_hashtbl_size
= 0;
3984 nfsd4_load_reboot_recovery_data(void)
3989 nfsd4_init_recdir(user_recovery_dirname
);
3990 status
= nfsd4_recdir_load();
3991 nfs4_unlock_state();
3993 printk("NFSD: Failure reading reboot recovery data\n");
3997 get_nfs4_grace_period(void)
3999 return max(user_lease_time
, lease_time
) * HZ
;
4003 * Since the lifetime of a delegation isn't limited to that of an open, a
4004 * client may quite reasonably hang on to a delegation as long as it has
4005 * the inode cached. This becomes an obvious problem the first time a
4006 * client's inode cache approaches the size of the server's total memory.
4008 * For now we avoid this problem by imposing a hard limit on the number
4009 * of delegations, which varies according to the server's memory size.
4012 set_max_delegations(void)
4015 * Allow at most 4 delegations per megabyte of RAM. Quick
4016 * estimates suggest that in the worst case (where every delegation
4017 * is for a different inode), a delegation could take about 1.5K,
4018 * giving a worst case usage of about 6% of memory.
4020 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4023 /* initialization to perform when the nfsd service is started: */
4026 __nfs4_state_start(void)
4028 unsigned long grace_time
;
4030 boot_time
= get_seconds();
4031 grace_time
= get_nfs4_grace_period();
4032 lease_time
= user_lease_time
;
4033 locks_start_grace(&nfsd4_manager
);
4034 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4036 laundry_wq
= create_singlethread_workqueue("nfsd4");
4037 if (laundry_wq
== NULL
)
4039 queue_delayed_work(laundry_wq
, &laundromat_work
, grace_time
);
4040 set_max_delegations();
4041 return set_callback_cred();
4045 nfs4_state_start(void)
4051 nfsd4_load_reboot_recovery_data();
4052 ret
= __nfs4_state_start();
4060 nfs4_lease_time(void)
4066 __nfs4_state_shutdown(void)
4069 struct nfs4_client
*clp
= NULL
;
4070 struct nfs4_delegation
*dp
= NULL
;
4071 struct list_head
*pos
, *next
, reaplist
;
4073 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4074 while (!list_empty(&conf_id_hashtbl
[i
])) {
4075 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4078 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4079 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4083 INIT_LIST_HEAD(&reaplist
);
4084 spin_lock(&recall_lock
);
4085 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4086 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4087 list_move(&dp
->dl_recall_lru
, &reaplist
);
4089 spin_unlock(&recall_lock
);
4090 list_for_each_safe(pos
, next
, &reaplist
) {
4091 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4092 list_del_init(&dp
->dl_recall_lru
);
4093 unhash_delegation(dp
);
4096 nfsd4_shutdown_recdir();
4101 nfs4_state_shutdown(void)
4103 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
4104 destroy_workqueue(laundry_wq
);
4105 locks_end_grace(&nfsd4_manager
);
4107 nfs4_release_reclaim();
4108 __nfs4_state_shutdown();
4109 nfs4_unlock_state();
4113 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4114 * accessed when nfsd is starting.
4117 nfs4_set_recdir(char *recdir
)
4119 strcpy(user_recovery_dirname
, recdir
);
4123 * Change the NFSv4 recovery directory to recdir.
4126 nfs4_reset_recoverydir(char *recdir
)
4131 status
= kern_path(recdir
, LOOKUP_FOLLOW
, &path
);
4135 if (S_ISDIR(path
.dentry
->d_inode
->i_mode
)) {
4136 nfs4_set_recdir(recdir
);
4144 nfs4_recoverydir(void)
4146 return user_recovery_dirname
;
4150 * Called when leasetime is changed.
4152 * The only way the protocol gives us to handle on-the-fly lease changes is to
4153 * simulate a reboot. Instead of doing that, we just wait till the next time
4154 * we start to register any changes in lease time. If the administrator
4155 * really wants to change the lease time *now*, they can go ahead and bring
4156 * nfsd down and then back up again after changing the lease time.
4158 * user_lease_time is protected by nfsd_mutex since it's only really accessed
4159 * when nfsd is starting
4162 nfs4_reset_lease(time_t leasetime
)
4164 user_lease_time
= leasetime
;