2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
36 #include <linux/smp_lock.h>
37 #include <linux/namei.h>
38 #include <linux/swap.h>
39 #include <linux/sunrpc/svcauth_gss.h>
40 #include <linux/sunrpc/clnt.h>
44 #define NFSDDBG_FACILITY NFSDDBG_PROC
47 time_t nfsd4_lease
= 90; /* default lease time */
48 time_t nfsd4_grace
= 90;
49 static time_t boot_time
;
50 static u32 current_ownerid
= 1;
51 static u32 current_fileid
= 1;
52 static u32 current_delegid
= 1;
54 static stateid_t zerostateid
; /* bits all 0 */
55 static stateid_t onestateid
; /* bits all 1 */
56 static u64 current_sessionid
= 1;
58 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
59 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
61 /* forward declarations */
62 static struct nfs4_stateid
* find_stateid(stateid_t
*stid
, int flags
);
63 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
64 static char user_recovery_dirname
[PATH_MAX
] = "/var/lib/nfs/v4recovery";
65 static void nfs4_set_recdir(char *recdir
);
69 /* Currently used for almost all code touching nfsv4 state: */
70 static DEFINE_MUTEX(client_mutex
);
73 * Currently used for the del_recall_lru and file hash table. In an
74 * effort to decrease the scope of the client_mutex, this spinlock may
75 * eventually cover more:
77 static DEFINE_SPINLOCK(recall_lock
);
79 static struct kmem_cache
*stateowner_slab
= NULL
;
80 static struct kmem_cache
*file_slab
= NULL
;
81 static struct kmem_cache
*stateid_slab
= NULL
;
82 static struct kmem_cache
*deleg_slab
= NULL
;
87 mutex_lock(&client_mutex
);
91 nfs4_unlock_state(void)
93 mutex_unlock(&client_mutex
);
97 opaque_hashval(const void *ptr
, int nbytes
)
99 unsigned char *cptr
= (unsigned char *) ptr
;
109 static struct list_head del_recall_lru
;
112 put_nfs4_file(struct nfs4_file
*fi
)
114 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
115 list_del(&fi
->fi_hash
);
116 spin_unlock(&recall_lock
);
118 kmem_cache_free(file_slab
, fi
);
123 get_nfs4_file(struct nfs4_file
*fi
)
125 atomic_inc(&fi
->fi_ref
);
128 static int num_delegations
;
129 unsigned int max_delegations
;
132 * Open owner state (share locks)
135 /* hash tables for nfs4_stateowner */
136 #define OWNER_HASH_BITS 8
137 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
138 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
140 #define ownerid_hashval(id) \
141 ((id) & OWNER_HASH_MASK)
142 #define ownerstr_hashval(clientid, ownername) \
143 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
145 static struct list_head ownerid_hashtbl
[OWNER_HASH_SIZE
];
146 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
148 /* hash table for nfs4_file */
149 #define FILE_HASH_BITS 8
150 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
151 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
152 /* hash table for (open)nfs4_stateid */
153 #define STATEID_HASH_BITS 10
154 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
155 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
157 #define file_hashval(x) \
158 hash_ptr(x, FILE_HASH_BITS)
159 #define stateid_hashval(owner_id, file_id) \
160 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
162 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
163 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
165 static struct nfs4_delegation
*
166 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
168 struct nfs4_delegation
*dp
;
169 struct nfs4_file
*fp
= stp
->st_file
;
170 struct nfs4_cb_conn
*cb
= &stp
->st_stateowner
->so_client
->cl_cb_conn
;
172 dprintk("NFSD alloc_init_deleg\n");
173 if (fp
->fi_had_conflict
)
175 if (num_delegations
> max_delegations
)
177 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
181 INIT_LIST_HEAD(&dp
->dl_perfile
);
182 INIT_LIST_HEAD(&dp
->dl_perclnt
);
183 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
188 get_file(stp
->st_vfs_file
);
189 dp
->dl_vfs_file
= stp
->st_vfs_file
;
191 dp
->dl_ident
= cb
->cb_ident
;
192 dp
->dl_stateid
.si_boot
= get_seconds();
193 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
194 dp
->dl_stateid
.si_fileid
= 0;
195 dp
->dl_stateid
.si_generation
= 0;
196 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
198 atomic_set(&dp
->dl_count
, 1);
199 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
200 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
201 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
206 nfs4_put_delegation(struct nfs4_delegation
*dp
)
208 if (atomic_dec_and_test(&dp
->dl_count
)) {
209 dprintk("NFSD: freeing dp %p\n",dp
);
210 put_nfs4_file(dp
->dl_file
);
211 kmem_cache_free(deleg_slab
, dp
);
216 /* Remove the associated file_lock first, then remove the delegation.
217 * lease_modify() is called to remove the FS_LEASE file_lock from
218 * the i_flock list, eventually calling nfsd's lock_manager
219 * fl_release_callback.
222 nfs4_close_delegation(struct nfs4_delegation
*dp
)
224 struct file
*filp
= dp
->dl_vfs_file
;
226 dprintk("NFSD: close_delegation dp %p\n",dp
);
227 dp
->dl_vfs_file
= NULL
;
228 /* The following nfsd_close may not actually close the file,
229 * but we want to remove the lease in any case. */
231 vfs_setlease(filp
, F_UNLCK
, &dp
->dl_flock
);
235 /* Called under the state lock. */
237 unhash_delegation(struct nfs4_delegation
*dp
)
239 list_del_init(&dp
->dl_perfile
);
240 list_del_init(&dp
->dl_perclnt
);
241 spin_lock(&recall_lock
);
242 list_del_init(&dp
->dl_recall_lru
);
243 spin_unlock(&recall_lock
);
244 nfs4_close_delegation(dp
);
245 nfs4_put_delegation(dp
);
252 /* Hash tables for nfs4_clientid state */
253 #define CLIENT_HASH_BITS 4
254 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
255 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
257 #define clientid_hashval(id) \
258 ((id) & CLIENT_HASH_MASK)
259 #define clientstr_hashval(name) \
260 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
262 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
263 * used in reboot/reset lease grace period processing
265 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
266 * setclientid_confirmed info.
268 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
271 * client_lru holds client queue ordered by nfs4_client.cl_time
274 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
275 * for last close replay.
277 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
278 static int reclaim_str_hashtbl_size
= 0;
279 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
280 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
281 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
282 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
283 static struct list_head client_lru
;
284 static struct list_head close_lru
;
286 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
288 list_del(&stp
->st_hash
);
289 list_del(&stp
->st_perfile
);
290 list_del(&stp
->st_perstateowner
);
293 static void free_generic_stateid(struct nfs4_stateid
*stp
)
295 put_nfs4_file(stp
->st_file
);
296 kmem_cache_free(stateid_slab
, stp
);
299 static void release_lock_stateid(struct nfs4_stateid
*stp
)
301 unhash_generic_stateid(stp
);
302 locks_remove_posix(stp
->st_vfs_file
, (fl_owner_t
)stp
->st_stateowner
);
303 free_generic_stateid(stp
);
306 static void unhash_lockowner(struct nfs4_stateowner
*sop
)
308 struct nfs4_stateid
*stp
;
310 list_del(&sop
->so_idhash
);
311 list_del(&sop
->so_strhash
);
312 list_del(&sop
->so_perstateid
);
313 while (!list_empty(&sop
->so_stateids
)) {
314 stp
= list_first_entry(&sop
->so_stateids
,
315 struct nfs4_stateid
, st_perstateowner
);
316 release_lock_stateid(stp
);
320 static void release_lockowner(struct nfs4_stateowner
*sop
)
322 unhash_lockowner(sop
);
323 nfs4_put_stateowner(sop
);
327 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
329 struct nfs4_stateowner
*lock_sop
;
331 while (!list_empty(&open_stp
->st_lockowners
)) {
332 lock_sop
= list_entry(open_stp
->st_lockowners
.next
,
333 struct nfs4_stateowner
, so_perstateid
);
334 /* list_del(&open_stp->st_lockowners); */
335 BUG_ON(lock_sop
->so_is_open_owner
);
336 release_lockowner(lock_sop
);
340 static void release_open_stateid(struct nfs4_stateid
*stp
)
342 unhash_generic_stateid(stp
);
343 release_stateid_lockowners(stp
);
344 nfsd_close(stp
->st_vfs_file
);
345 free_generic_stateid(stp
);
348 static void unhash_openowner(struct nfs4_stateowner
*sop
)
350 struct nfs4_stateid
*stp
;
352 list_del(&sop
->so_idhash
);
353 list_del(&sop
->so_strhash
);
354 list_del(&sop
->so_perclient
);
355 list_del(&sop
->so_perstateid
); /* XXX: necessary? */
356 while (!list_empty(&sop
->so_stateids
)) {
357 stp
= list_first_entry(&sop
->so_stateids
,
358 struct nfs4_stateid
, st_perstateowner
);
359 release_open_stateid(stp
);
363 static void release_openowner(struct nfs4_stateowner
*sop
)
365 unhash_openowner(sop
);
366 list_del(&sop
->so_close_lru
);
367 nfs4_put_stateowner(sop
);
370 static DEFINE_SPINLOCK(sessionid_lock
);
371 #define SESSION_HASH_SIZE 512
372 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
375 hash_sessionid(struct nfs4_sessionid
*sessionid
)
377 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
379 return sid
->sequence
% SESSION_HASH_SIZE
;
383 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
385 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
386 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
390 gen_sessionid(struct nfsd4_session
*ses
)
392 struct nfs4_client
*clp
= ses
->se_client
;
393 struct nfsd4_sessionid
*sid
;
395 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
396 sid
->clientid
= clp
->cl_clientid
;
397 sid
->sequence
= current_sessionid
++;
402 * The protocol defines ca_maxresponssize_cached to include the size of
403 * the rpc header, but all we need to cache is the data starting after
404 * the end of the initial SEQUENCE operation--the rest we regenerate
405 * each time. Therefore we can advertise a ca_maxresponssize_cached
406 * value that is the number of bytes in our cache plus a few additional
407 * bytes. In order to stay on the safe side, and not promise more than
408 * we can cache, those additional bytes must be the minimum possible: 24
409 * bytes of rpc header (xid through accept state, with AUTH_NULL
410 * verifier), 12 for the compound header (with zero-length tag), and 44
411 * for the SEQUENCE op response:
413 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
416 * Give the client the number of ca_maxresponsesize_cached slots it
417 * requests, of size bounded by NFSD_SLOT_CACHE_SIZE,
418 * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more
419 * than NFSD_MAX_SLOTS_PER_SESSION.
421 * If we run out of reserved DRC memory we should (up to a point)
422 * re-negotiate active sessions and reduce their slot usage to make
423 * rooom for new connections. For now we just fail the create session.
425 static int set_forechannel_drc_size(struct nfsd4_channel_attrs
*fchan
)
427 int mem
, size
= fchan
->maxresp_cached
;
429 if (fchan
->maxreqs
< 1)
432 if (size
< NFSD_MIN_HDR_SEQ_SZ
)
433 size
= NFSD_MIN_HDR_SEQ_SZ
;
434 size
-= NFSD_MIN_HDR_SEQ_SZ
;
435 if (size
> NFSD_SLOT_CACHE_SIZE
)
436 size
= NFSD_SLOT_CACHE_SIZE
;
438 /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */
439 mem
= fchan
->maxreqs
* size
;
440 if (mem
> NFSD_MAX_MEM_PER_SESSION
) {
441 fchan
->maxreqs
= NFSD_MAX_MEM_PER_SESSION
/ size
;
442 if (fchan
->maxreqs
> NFSD_MAX_SLOTS_PER_SESSION
)
443 fchan
->maxreqs
= NFSD_MAX_SLOTS_PER_SESSION
;
444 mem
= fchan
->maxreqs
* size
;
447 spin_lock(&nfsd_drc_lock
);
448 /* bound the total session drc memory ussage */
449 if (mem
+ nfsd_drc_mem_used
> nfsd_drc_max_mem
) {
450 fchan
->maxreqs
= (nfsd_drc_max_mem
- nfsd_drc_mem_used
) / size
;
451 mem
= fchan
->maxreqs
* size
;
453 nfsd_drc_mem_used
+= mem
;
454 spin_unlock(&nfsd_drc_lock
);
456 if (fchan
->maxreqs
== 0)
457 return nfserr_serverfault
;
459 fchan
->maxresp_cached
= size
+ NFSD_MIN_HDR_SEQ_SZ
;
464 * fchan holds the client values on input, and the server values on output
465 * sv_max_mesg is the maximum payload plus one page for overhead.
467 static int init_forechannel_attrs(struct svc_rqst
*rqstp
,
468 struct nfsd4_channel_attrs
*session_fchan
,
469 struct nfsd4_channel_attrs
*fchan
)
472 __u32 maxcount
= nfsd_serv
->sv_max_mesg
;
474 /* headerpadsz set to zero in encode routine */
476 /* Use the client's max request and max response size if possible */
477 if (fchan
->maxreq_sz
> maxcount
)
478 fchan
->maxreq_sz
= maxcount
;
479 session_fchan
->maxreq_sz
= fchan
->maxreq_sz
;
481 if (fchan
->maxresp_sz
> maxcount
)
482 fchan
->maxresp_sz
= maxcount
;
483 session_fchan
->maxresp_sz
= fchan
->maxresp_sz
;
485 /* Use the client's maxops if possible */
486 if (fchan
->maxops
> NFSD_MAX_OPS_PER_COMPOUND
)
487 fchan
->maxops
= NFSD_MAX_OPS_PER_COMPOUND
;
488 session_fchan
->maxops
= fchan
->maxops
;
490 /* FIXME: Error means no more DRC pages so the server should
491 * recover pages from existing sessions. For now fail session
494 status
= set_forechannel_drc_size(fchan
);
496 session_fchan
->maxresp_cached
= fchan
->maxresp_cached
;
497 session_fchan
->maxreqs
= fchan
->maxreqs
;
499 dprintk("%s status %d\n", __func__
, status
);
504 free_session_slots(struct nfsd4_session
*ses
)
508 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
509 kfree(ses
->se_slots
[i
]);
513 * We don't actually need to cache the rpc and session headers, so we
514 * can allocate a little less for each slot:
516 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
518 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
522 alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
,
523 struct nfsd4_create_session
*cses
)
525 struct nfsd4_session
*new, tmp
;
526 struct nfsd4_slot
*sp
;
527 int idx
, slotsize
, cachesize
, i
;
530 memset(&tmp
, 0, sizeof(tmp
));
532 /* FIXME: For now, we just accept the client back channel attributes. */
533 tmp
.se_bchannel
= cses
->back_channel
;
534 status
= init_forechannel_attrs(rqstp
, &tmp
.se_fchannel
,
535 &cses
->fore_channel
);
539 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
)
540 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
542 status
= nfserr_serverfault
;
543 /* allocate struct nfsd4_session and slot table pointers in one piece */
544 slotsize
= tmp
.se_fchannel
.maxreqs
* sizeof(struct nfsd4_slot
*);
545 new = kzalloc(sizeof(*new) + slotsize
, GFP_KERNEL
);
549 memcpy(new, &tmp
, sizeof(*new));
551 /* allocate each struct nfsd4_slot and data cache in one piece */
552 cachesize
= slot_bytes(&new->se_fchannel
);
553 for (i
= 0; i
< new->se_fchannel
.maxreqs
; i
++) {
554 sp
= kzalloc(sizeof(*sp
) + cachesize
, GFP_KERNEL
);
557 new->se_slots
[i
] = sp
;
560 new->se_client
= clp
;
562 idx
= hash_sessionid(&new->se_sessionid
);
563 memcpy(clp
->cl_sessionid
.data
, new->se_sessionid
.data
,
564 NFS4_MAX_SESSIONID_LEN
);
566 new->se_flags
= cses
->flags
;
567 kref_init(&new->se_ref
);
568 spin_lock(&sessionid_lock
);
569 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
570 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
571 spin_unlock(&sessionid_lock
);
577 free_session_slots(new);
582 /* caller must hold sessionid_lock */
583 static struct nfsd4_session
*
584 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
586 struct nfsd4_session
*elem
;
589 dump_sessionid(__func__
, sessionid
);
590 idx
= hash_sessionid(sessionid
);
591 dprintk("%s: idx is %d\n", __func__
, idx
);
592 /* Search in the appropriate list */
593 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
594 dump_sessionid("list traversal", &elem
->se_sessionid
);
595 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
596 NFS4_MAX_SESSIONID_LEN
)) {
601 dprintk("%s: session not found\n", __func__
);
605 /* caller must hold sessionid_lock */
607 unhash_session(struct nfsd4_session
*ses
)
609 list_del(&ses
->se_hash
);
610 list_del(&ses
->se_perclnt
);
614 release_session(struct nfsd4_session
*ses
)
616 spin_lock(&sessionid_lock
);
618 spin_unlock(&sessionid_lock
);
619 nfsd4_put_session(ses
);
623 free_session(struct kref
*kref
)
625 struct nfsd4_session
*ses
;
628 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
629 spin_lock(&nfsd_drc_lock
);
630 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
631 nfsd_drc_mem_used
-= mem
;
632 spin_unlock(&nfsd_drc_lock
);
633 free_session_slots(ses
);
638 renew_client(struct nfs4_client
*clp
)
641 * Move client to the end to the LRU list.
643 dprintk("renewing client (clientid %08x/%08x)\n",
644 clp
->cl_clientid
.cl_boot
,
645 clp
->cl_clientid
.cl_id
);
646 list_move_tail(&clp
->cl_lru
, &client_lru
);
647 clp
->cl_time
= get_seconds();
650 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
652 STALE_CLIENTID(clientid_t
*clid
)
654 if (clid
->cl_boot
== boot_time
)
656 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
657 clid
->cl_boot
, clid
->cl_id
, boot_time
);
662 * XXX Should we use a slab cache ?
663 * This type of memory management is somewhat inefficient, but we use it
664 * anyway since SETCLIENTID is not a common operation.
666 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
668 struct nfs4_client
*clp
;
670 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
673 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
674 if (clp
->cl_name
.data
== NULL
) {
678 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
679 clp
->cl_name
.len
= name
.len
;
684 free_client(struct nfs4_client
*clp
)
686 if (clp
->cl_cred
.cr_group_info
)
687 put_group_info(clp
->cl_cred
.cr_group_info
);
688 kfree(clp
->cl_principal
);
689 kfree(clp
->cl_name
.data
);
694 expire_client(struct nfs4_client
*clp
)
696 struct nfs4_stateowner
*sop
;
697 struct nfs4_delegation
*dp
;
698 struct list_head reaplist
;
700 INIT_LIST_HEAD(&reaplist
);
701 spin_lock(&recall_lock
);
702 while (!list_empty(&clp
->cl_delegations
)) {
703 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
704 dprintk("NFSD: expire client. dp %p, fp %p\n", dp
,
706 list_del_init(&dp
->dl_perclnt
);
707 list_move(&dp
->dl_recall_lru
, &reaplist
);
709 spin_unlock(&recall_lock
);
710 while (!list_empty(&reaplist
)) {
711 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
712 list_del_init(&dp
->dl_recall_lru
);
713 unhash_delegation(dp
);
715 list_del(&clp
->cl_idhash
);
716 list_del(&clp
->cl_strhash
);
717 list_del(&clp
->cl_lru
);
718 while (!list_empty(&clp
->cl_openowners
)) {
719 sop
= list_entry(clp
->cl_openowners
.next
, struct nfs4_stateowner
, so_perclient
);
720 release_openowner(sop
);
722 while (!list_empty(&clp
->cl_sessions
)) {
723 struct nfsd4_session
*ses
;
724 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
726 release_session(ses
);
728 nfsd4_set_callback_client(clp
, NULL
);
729 if (clp
->cl_cb_conn
.cb_xprt
)
730 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
734 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
736 memcpy(target
->cl_verifier
.data
, source
->data
,
737 sizeof(target
->cl_verifier
.data
));
740 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
742 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
743 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
746 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
748 target
->cr_uid
= source
->cr_uid
;
749 target
->cr_gid
= source
->cr_gid
;
750 target
->cr_group_info
= source
->cr_group_info
;
751 get_group_info(target
->cr_group_info
);
754 static int same_name(const char *n1
, const char *n2
)
756 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
760 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
762 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
766 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
768 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
771 /* XXX what about NGROUP */
773 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
775 return cr1
->cr_uid
== cr2
->cr_uid
;
778 static void gen_clid(struct nfs4_client
*clp
)
780 static u32 current_clientid
= 1;
782 clp
->cl_clientid
.cl_boot
= boot_time
;
783 clp
->cl_clientid
.cl_id
= current_clientid
++;
786 static void gen_confirm(struct nfs4_client
*clp
)
791 p
= (u32
*)clp
->cl_confirm
.data
;
792 *p
++ = get_seconds();
796 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
797 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
799 struct nfs4_client
*clp
;
800 struct sockaddr
*sa
= svc_addr(rqstp
);
803 clp
= alloc_client(name
);
807 princ
= svc_gss_principal(rqstp
);
809 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
810 if (clp
->cl_principal
== NULL
) {
816 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
817 atomic_set(&clp
->cl_cb_set
, 0);
818 INIT_LIST_HEAD(&clp
->cl_idhash
);
819 INIT_LIST_HEAD(&clp
->cl_strhash
);
820 INIT_LIST_HEAD(&clp
->cl_openowners
);
821 INIT_LIST_HEAD(&clp
->cl_delegations
);
822 INIT_LIST_HEAD(&clp
->cl_sessions
);
823 INIT_LIST_HEAD(&clp
->cl_lru
);
824 clear_bit(0, &clp
->cl_cb_slot_busy
);
825 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
826 copy_verf(clp
, verf
);
827 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
828 clp
->cl_flavor
= rqstp
->rq_flavor
;
829 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
835 static int check_name(struct xdr_netobj name
)
839 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
840 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
847 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
849 unsigned int idhashval
;
851 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
852 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
853 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
854 list_add_tail(&clp
->cl_lru
, &client_lru
);
855 clp
->cl_time
= get_seconds();
859 move_to_confirmed(struct nfs4_client
*clp
)
861 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
862 unsigned int strhashval
;
864 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
865 list_del_init(&clp
->cl_strhash
);
866 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
867 strhashval
= clientstr_hashval(clp
->cl_recdir
);
868 list_add(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
872 static struct nfs4_client
*
873 find_confirmed_client(clientid_t
*clid
)
875 struct nfs4_client
*clp
;
876 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
878 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
879 if (same_clid(&clp
->cl_clientid
, clid
))
885 static struct nfs4_client
*
886 find_unconfirmed_client(clientid_t
*clid
)
888 struct nfs4_client
*clp
;
889 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
891 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
892 if (same_clid(&clp
->cl_clientid
, clid
))
899 * Return 1 iff clp's clientid establishment method matches the use_exchange_id
900 * parameter. Matching is based on the fact the at least one of the
901 * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1
903 * FIXME: we need to unify the clientid namespaces for nfsv4.x
904 * and correctly deal with client upgrade/downgrade in EXCHANGE_ID
905 * and SET_CLIENTID{,_CONFIRM}
908 match_clientid_establishment(struct nfs4_client
*clp
, bool use_exchange_id
)
910 bool has_exchange_flags
= (clp
->cl_exchange_flags
!= 0);
911 return use_exchange_id
== has_exchange_flags
;
914 static struct nfs4_client
*
915 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
,
916 bool use_exchange_id
)
918 struct nfs4_client
*clp
;
920 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
921 if (same_name(clp
->cl_recdir
, dname
) &&
922 match_clientid_establishment(clp
, use_exchange_id
))
928 static struct nfs4_client
*
929 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
,
930 bool use_exchange_id
)
932 struct nfs4_client
*clp
;
934 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
935 if (same_name(clp
->cl_recdir
, dname
) &&
936 match_clientid_establishment(clp
, use_exchange_id
))
943 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, u32 scopeid
)
945 struct nfs4_cb_conn
*cb
= &clp
->cl_cb_conn
;
946 unsigned short expected_family
;
948 /* Currently, we only support tcp and tcp6 for the callback channel */
949 if (se
->se_callback_netid_len
== 3 &&
950 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
951 expected_family
= AF_INET
;
952 else if (se
->se_callback_netid_len
== 4 &&
953 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
954 expected_family
= AF_INET6
;
958 cb
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
959 se
->se_callback_addr_len
,
960 (struct sockaddr
*) &cb
->cb_addr
,
961 sizeof(cb
->cb_addr
));
963 if (!cb
->cb_addrlen
|| cb
->cb_addr
.ss_family
!= expected_family
)
966 if (cb
->cb_addr
.ss_family
== AF_INET6
)
967 ((struct sockaddr_in6
*) &cb
->cb_addr
)->sin6_scope_id
= scopeid
;
969 cb
->cb_minorversion
= 0;
970 cb
->cb_prog
= se
->se_callback_prog
;
971 cb
->cb_ident
= se
->se_callback_ident
;
974 cb
->cb_addr
.ss_family
= AF_UNSPEC
;
976 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
977 "will not receive delegations\n",
978 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
984 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
987 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
989 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
992 dprintk("--> %s slot %p\n", __func__
, slot
);
994 slot
->sl_opcnt
= resp
->opcnt
;
995 slot
->sl_status
= resp
->cstate
.status
;
997 if (nfsd4_not_cached(resp
)) {
998 slot
->sl_datalen
= 0;
1001 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1002 base
= (char *)resp
->cstate
.datap
-
1003 (char *)resp
->xbuf
->head
[0].iov_base
;
1004 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1006 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1011 * Encode the replay sequence operation from the slot values.
1012 * If cachethis is FALSE encode the uncached rep error on the next
1013 * operation which sets resp->p and increments resp->opcnt for
1014 * nfs4svc_encode_compoundres.
1018 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1019 struct nfsd4_compoundres
*resp
)
1021 struct nfsd4_op
*op
;
1022 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1024 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1025 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1027 /* Encode the replayed sequence operation */
1028 op
= &args
->ops
[resp
->opcnt
- 1];
1029 nfsd4_encode_operation(resp
, op
);
1031 /* Return nfserr_retry_uncached_rep in next operation. */
1032 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1033 op
= &args
->ops
[resp
->opcnt
++];
1034 op
->status
= nfserr_retry_uncached_rep
;
1035 nfsd4_encode_operation(resp
, op
);
1041 * The sequence operation is not cached because we can use the slot and
1045 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1046 struct nfsd4_sequence
*seq
)
1048 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1051 dprintk("--> %s slot %p\n", __func__
, slot
);
1053 /* Either returns 0 or nfserr_retry_uncached */
1054 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1055 if (status
== nfserr_retry_uncached_rep
)
1058 /* The sequence operation has been encoded, cstate->datap set. */
1059 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1061 resp
->opcnt
= slot
->sl_opcnt
;
1062 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1063 status
= slot
->sl_status
;
1069 * Set the exchange_id flags returned by the server.
1072 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1074 /* pNFS is not supported */
1075 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1077 /* Referrals are supported, Migration is not. */
1078 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1080 /* set the wire flags to return to client. */
1081 clid
->flags
= new->cl_exchange_flags
;
1085 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1086 struct nfsd4_compound_state
*cstate
,
1087 struct nfsd4_exchange_id
*exid
)
1089 struct nfs4_client
*unconf
, *conf
, *new;
1091 unsigned int strhashval
;
1092 char dname
[HEXDIR_LEN
];
1093 char addr_str
[INET6_ADDRSTRLEN
];
1094 nfs4_verifier verf
= exid
->verifier
;
1095 struct sockaddr
*sa
= svc_addr(rqstp
);
1097 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1098 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1099 "ip_addr=%s flags %x, spa_how %d\n",
1100 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1101 addr_str
, exid
->flags
, exid
->spa_how
);
1103 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1104 return nfserr_inval
;
1106 /* Currently only support SP4_NONE */
1107 switch (exid
->spa_how
) {
1111 return nfserr_encr_alg_unsupp
;
1113 BUG(); /* checked by xdr code */
1115 return nfserr_serverfault
; /* no excuse :-/ */
1118 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1123 strhashval
= clientstr_hashval(dname
);
1128 conf
= find_confirmed_client_by_str(dname
, strhashval
, true);
1130 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1131 /* 18.35.4 case 8 */
1132 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1133 status
= nfserr_not_same
;
1136 /* Client reboot: destroy old state */
1137 expire_client(conf
);
1140 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1141 /* 18.35.4 case 9 */
1142 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1143 status
= nfserr_perm
;
1146 expire_client(conf
);
1150 * Set bit when the owner id and verifier map to an already
1151 * confirmed client id (18.35.3).
1153 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1156 * Falling into 18.35.4 case 2, possible router replay.
1157 * Leave confirmed record intact and return same result.
1159 copy_verf(conf
, &verf
);
1164 /* 18.35.4 case 7 */
1165 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1166 status
= nfserr_noent
;
1170 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, true);
1173 * Possible retry or client restart. Per 18.35.4 case 4,
1174 * a new unconfirmed record should be generated regardless
1175 * of whether any properties have changed.
1177 expire_client(unconf
);
1182 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1184 status
= nfserr_serverfault
;
1189 add_to_unconfirmed(new, strhashval
);
1191 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1192 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1195 nfsd4_set_ex_flags(new, exid
);
1197 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1198 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1202 nfs4_unlock_state();
1204 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1209 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1211 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1214 /* The slot is in use, and no response has been sent. */
1216 if (seqid
== slot_seqid
)
1217 return nfserr_jukebox
;
1219 return nfserr_seq_misordered
;
1222 if (likely(seqid
== slot_seqid
+ 1))
1225 if (seqid
== slot_seqid
)
1226 return nfserr_replay_cache
;
1228 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1230 /* Misordered replay or misordered new request */
1231 return nfserr_seq_misordered
;
1235 * Cache the create session result into the create session single DRC
1236 * slot cache by saving the xdr structure. sl_seqid has been set.
1237 * Do this for solo or embedded create session operations.
1240 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1241 struct nfsd4_clid_slot
*slot
, int nfserr
)
1243 slot
->sl_status
= nfserr
;
1244 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1248 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1249 struct nfsd4_clid_slot
*slot
)
1251 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1252 return slot
->sl_status
;
1256 nfsd4_create_session(struct svc_rqst
*rqstp
,
1257 struct nfsd4_compound_state
*cstate
,
1258 struct nfsd4_create_session
*cr_ses
)
1260 struct sockaddr
*sa
= svc_addr(rqstp
);
1261 struct nfs4_client
*conf
, *unconf
;
1262 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1266 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1267 conf
= find_confirmed_client(&cr_ses
->clientid
);
1270 cs_slot
= &conf
->cl_cs_slot
;
1271 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1272 if (status
== nfserr_replay_cache
) {
1273 dprintk("Got a create_session replay! seqid= %d\n",
1275 /* Return the cached reply status */
1276 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1278 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1279 status
= nfserr_seq_misordered
;
1280 dprintk("Sequence misordered!\n");
1281 dprintk("Expected seqid= %d but got seqid= %d\n",
1282 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1285 cs_slot
->sl_seqid
++;
1286 } else if (unconf
) {
1287 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1288 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1289 status
= nfserr_clid_inuse
;
1293 cs_slot
= &unconf
->cl_cs_slot
;
1294 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1296 /* an unconfirmed replay returns misordered */
1297 status
= nfserr_seq_misordered
;
1301 cs_slot
->sl_seqid
++; /* from 0 to 1 */
1302 move_to_confirmed(unconf
);
1304 if (cr_ses
->flags
& SESSION4_BACK_CHAN
) {
1305 unconf
->cl_cb_conn
.cb_xprt
= rqstp
->rq_xprt
;
1306 svc_xprt_get(rqstp
->rq_xprt
);
1308 (struct sockaddr
*)&unconf
->cl_cb_conn
.cb_addr
,
1310 unconf
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1311 unconf
->cl_cb_conn
.cb_minorversion
=
1312 cstate
->minorversion
;
1313 unconf
->cl_cb_conn
.cb_prog
= cr_ses
->callback_prog
;
1314 unconf
->cl_cb_seq_nr
= 1;
1315 nfsd4_probe_callback(unconf
, &unconf
->cl_cb_conn
);
1319 status
= nfserr_stale_clientid
;
1324 * We do not support RDMA or persistent sessions
1326 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1327 cr_ses
->flags
&= ~SESSION4_RDMA
;
1329 status
= alloc_init_session(rqstp
, conf
, cr_ses
);
1333 memcpy(cr_ses
->sessionid
.data
, conf
->cl_sessionid
.data
,
1334 NFS4_MAX_SESSIONID_LEN
);
1335 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1338 /* cache solo and embedded create sessions under the state lock */
1339 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1341 nfs4_unlock_state();
1342 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1347 nfsd4_destroy_session(struct svc_rqst
*r
,
1348 struct nfsd4_compound_state
*cstate
,
1349 struct nfsd4_destroy_session
*sessionid
)
1351 struct nfsd4_session
*ses
;
1352 u32 status
= nfserr_badsession
;
1355 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1356 * - Should we return nfserr_back_chan_busy if waiting for
1357 * callbacks on to-be-destroyed session?
1358 * - Do we need to clear any callback info from previous session?
1361 dump_sessionid(__func__
, &sessionid
->sessionid
);
1362 spin_lock(&sessionid_lock
);
1363 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1365 spin_unlock(&sessionid_lock
);
1369 unhash_session(ses
);
1370 spin_unlock(&sessionid_lock
);
1372 /* wait for callbacks */
1373 nfsd4_set_callback_client(ses
->se_client
, NULL
);
1374 nfsd4_put_session(ses
);
1377 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1382 nfsd4_sequence(struct svc_rqst
*rqstp
,
1383 struct nfsd4_compound_state
*cstate
,
1384 struct nfsd4_sequence
*seq
)
1386 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1387 struct nfsd4_session
*session
;
1388 struct nfsd4_slot
*slot
;
1391 if (resp
->opcnt
!= 1)
1392 return nfserr_sequence_pos
;
1394 spin_lock(&sessionid_lock
);
1395 status
= nfserr_badsession
;
1396 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1400 status
= nfserr_badslot
;
1401 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1404 slot
= session
->se_slots
[seq
->slotid
];
1405 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1407 /* We do not negotiate the number of slots yet, so set the
1408 * maxslots to the session maxreqs which is used to encode
1409 * sr_highest_slotid and the sr_target_slot id to maxslots */
1410 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1412 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1413 if (status
== nfserr_replay_cache
) {
1414 cstate
->slot
= slot
;
1415 cstate
->session
= session
;
1416 /* Return the cached reply status and set cstate->status
1417 * for nfsd4_proc_compound processing */
1418 status
= nfsd4_replay_cache_entry(resp
, seq
);
1419 cstate
->status
= nfserr_replay_cache
;
1425 /* Success! bump slot seqid */
1426 slot
->sl_inuse
= true;
1427 slot
->sl_seqid
= seq
->seqid
;
1428 slot
->sl_cachethis
= seq
->cachethis
;
1430 cstate
->slot
= slot
;
1431 cstate
->session
= session
;
1433 /* Hold a session reference until done processing the compound:
1434 * nfsd4_put_session called only if the cstate slot is set.
1436 nfsd4_get_session(session
);
1438 spin_unlock(&sessionid_lock
);
1439 /* Renew the clientid on success and on replay */
1440 if (cstate
->session
) {
1442 renew_client(session
->se_client
);
1443 nfs4_unlock_state();
1445 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1450 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1451 struct nfsd4_setclientid
*setclid
)
1453 struct sockaddr
*sa
= svc_addr(rqstp
);
1454 struct xdr_netobj clname
= {
1455 .len
= setclid
->se_namelen
,
1456 .data
= setclid
->se_name
,
1458 nfs4_verifier clverifier
= setclid
->se_verf
;
1459 unsigned int strhashval
;
1460 struct nfs4_client
*conf
, *unconf
, *new;
1462 char dname
[HEXDIR_LEN
];
1464 if (!check_name(clname
))
1465 return nfserr_inval
;
1467 status
= nfs4_make_rec_clidname(dname
, &clname
);
1472 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1473 * We get here on a DRC miss.
1476 strhashval
= clientstr_hashval(dname
);
1479 conf
= find_confirmed_client_by_str(dname
, strhashval
, false);
1481 /* RFC 3530 14.2.33 CASE 0: */
1482 status
= nfserr_clid_inuse
;
1483 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1484 char addr_str
[INET6_ADDRSTRLEN
];
1485 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1487 dprintk("NFSD: setclientid: string in use by client "
1488 "at %s\n", addr_str
);
1493 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1494 * has a description of SETCLIENTID request processing consisting
1495 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1497 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
, false);
1498 status
= nfserr_resource
;
1501 * RFC 3530 14.2.33 CASE 4:
1502 * placed first, because it is the normal case
1505 expire_client(unconf
);
1506 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1510 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
1512 * RFC 3530 14.2.33 CASE 1:
1513 * probable callback update
1516 /* Note this is removing unconfirmed {*x***},
1517 * which is stronger than RFC recommended {vxc**}.
1518 * This has the advantage that there is at most
1519 * one {*x***} in either list at any time.
1521 expire_client(unconf
);
1523 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1526 copy_clid(new, conf
);
1527 } else if (!unconf
) {
1529 * RFC 3530 14.2.33 CASE 2:
1530 * probable client reboot; state will be removed if
1533 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1539 * RFC 3530 14.2.33 CASE 3:
1540 * probable client reboot; state will be removed if
1543 expire_client(unconf
);
1544 new = create_client(clname
, dname
, rqstp
, &clverifier
);
1549 gen_callback(new, setclid
, rpc_get_scope_id(sa
));
1550 add_to_unconfirmed(new, strhashval
);
1551 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1552 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
1553 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
1556 nfs4_unlock_state();
1562 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1563 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1564 * bullets, labeled as CASE1 - CASE4 below.
1567 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
1568 struct nfsd4_compound_state
*cstate
,
1569 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
1571 struct sockaddr
*sa
= svc_addr(rqstp
);
1572 struct nfs4_client
*conf
, *unconf
;
1573 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
1574 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
1577 if (STALE_CLIENTID(clid
))
1578 return nfserr_stale_clientid
;
1580 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1581 * We get here on a DRC miss.
1586 conf
= find_confirmed_client(clid
);
1587 unconf
= find_unconfirmed_client(clid
);
1589 status
= nfserr_clid_inuse
;
1590 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
1592 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
1596 * section 14.2.34 of RFC 3530 has a description of
1597 * SETCLIENTID_CONFIRM request processing consisting
1598 * of 4 bullet points, labeled as CASE1 - CASE4 below.
1600 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
1602 * RFC 3530 14.2.34 CASE 1:
1605 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
1606 status
= nfserr_clid_inuse
;
1608 atomic_set(&conf
->cl_cb_set
, 0);
1609 nfsd4_probe_callback(conf
, &unconf
->cl_cb_conn
);
1610 expire_client(unconf
);
1614 } else if (conf
&& !unconf
) {
1616 * RFC 3530 14.2.34 CASE 2:
1617 * probable retransmitted request; play it safe and
1620 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
1621 status
= nfserr_clid_inuse
;
1624 } else if (!conf
&& unconf
1625 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
1627 * RFC 3530 14.2.34 CASE 3:
1628 * Normal case; new or rebooted client:
1630 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
1631 status
= nfserr_clid_inuse
;
1634 clientstr_hashval(unconf
->cl_recdir
);
1635 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
1638 nfsd4_remove_clid_dir(conf
);
1639 expire_client(conf
);
1641 move_to_confirmed(unconf
);
1643 nfsd4_probe_callback(conf
, &conf
->cl_cb_conn
);
1646 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
1647 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
1650 * RFC 3530 14.2.34 CASE 4:
1651 * Client probably hasn't noticed that we rebooted yet.
1653 status
= nfserr_stale_clientid
;
1655 /* check that we have hit one of the cases...*/
1656 status
= nfserr_clid_inuse
;
1659 nfs4_unlock_state();
1663 /* OPEN Share state helper functions */
1664 static inline struct nfs4_file
*
1665 alloc_init_file(struct inode
*ino
)
1667 struct nfs4_file
*fp
;
1668 unsigned int hashval
= file_hashval(ino
);
1670 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
1672 atomic_set(&fp
->fi_ref
, 1);
1673 INIT_LIST_HEAD(&fp
->fi_hash
);
1674 INIT_LIST_HEAD(&fp
->fi_stateids
);
1675 INIT_LIST_HEAD(&fp
->fi_delegations
);
1676 spin_lock(&recall_lock
);
1677 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
1678 spin_unlock(&recall_lock
);
1679 fp
->fi_inode
= igrab(ino
);
1680 fp
->fi_id
= current_fileid
++;
1681 fp
->fi_had_conflict
= false;
1688 nfsd4_free_slab(struct kmem_cache
**slab
)
1692 kmem_cache_destroy(*slab
);
1697 nfsd4_free_slabs(void)
1699 nfsd4_free_slab(&stateowner_slab
);
1700 nfsd4_free_slab(&file_slab
);
1701 nfsd4_free_slab(&stateid_slab
);
1702 nfsd4_free_slab(&deleg_slab
);
1706 nfsd4_init_slabs(void)
1708 stateowner_slab
= kmem_cache_create("nfsd4_stateowners",
1709 sizeof(struct nfs4_stateowner
), 0, 0, NULL
);
1710 if (stateowner_slab
== NULL
)
1712 file_slab
= kmem_cache_create("nfsd4_files",
1713 sizeof(struct nfs4_file
), 0, 0, NULL
);
1714 if (file_slab
== NULL
)
1716 stateid_slab
= kmem_cache_create("nfsd4_stateids",
1717 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
1718 if (stateid_slab
== NULL
)
1720 deleg_slab
= kmem_cache_create("nfsd4_delegations",
1721 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
1722 if (deleg_slab
== NULL
)
1727 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1732 nfs4_free_stateowner(struct kref
*kref
)
1734 struct nfs4_stateowner
*sop
=
1735 container_of(kref
, struct nfs4_stateowner
, so_ref
);
1736 kfree(sop
->so_owner
.data
);
1737 kmem_cache_free(stateowner_slab
, sop
);
1740 static inline struct nfs4_stateowner
*
1741 alloc_stateowner(struct xdr_netobj
*owner
)
1743 struct nfs4_stateowner
*sop
;
1745 if ((sop
= kmem_cache_alloc(stateowner_slab
, GFP_KERNEL
))) {
1746 if ((sop
->so_owner
.data
= kmalloc(owner
->len
, GFP_KERNEL
))) {
1747 memcpy(sop
->so_owner
.data
, owner
->data
, owner
->len
);
1748 sop
->so_owner
.len
= owner
->len
;
1749 kref_init(&sop
->so_ref
);
1752 kmem_cache_free(stateowner_slab
, sop
);
1757 static struct nfs4_stateowner
*
1758 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
1759 struct nfs4_stateowner
*sop
;
1760 struct nfs4_replay
*rp
;
1761 unsigned int idhashval
;
1763 if (!(sop
= alloc_stateowner(&open
->op_owner
)))
1765 idhashval
= ownerid_hashval(current_ownerid
);
1766 INIT_LIST_HEAD(&sop
->so_idhash
);
1767 INIT_LIST_HEAD(&sop
->so_strhash
);
1768 INIT_LIST_HEAD(&sop
->so_perclient
);
1769 INIT_LIST_HEAD(&sop
->so_stateids
);
1770 INIT_LIST_HEAD(&sop
->so_perstateid
); /* not used */
1771 INIT_LIST_HEAD(&sop
->so_close_lru
);
1773 list_add(&sop
->so_idhash
, &ownerid_hashtbl
[idhashval
]);
1774 list_add(&sop
->so_strhash
, &ownerstr_hashtbl
[strhashval
]);
1775 list_add(&sop
->so_perclient
, &clp
->cl_openowners
);
1776 sop
->so_is_open_owner
= 1;
1777 sop
->so_id
= current_ownerid
++;
1778 sop
->so_client
= clp
;
1779 sop
->so_seqid
= open
->op_seqid
;
1780 sop
->so_confirmed
= 0;
1781 rp
= &sop
->so_replay
;
1782 rp
->rp_status
= nfserr_serverfault
;
1784 rp
->rp_buf
= rp
->rp_ibuf
;
1789 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
1790 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
1791 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
1793 INIT_LIST_HEAD(&stp
->st_hash
);
1794 INIT_LIST_HEAD(&stp
->st_perstateowner
);
1795 INIT_LIST_HEAD(&stp
->st_lockowners
);
1796 INIT_LIST_HEAD(&stp
->st_perfile
);
1797 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
1798 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
1799 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
1800 stp
->st_stateowner
= sop
;
1803 stp
->st_stateid
.si_boot
= get_seconds();
1804 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
1805 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
1806 stp
->st_stateid
.si_generation
= 0;
1807 stp
->st_access_bmap
= 0;
1808 stp
->st_deny_bmap
= 0;
1809 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
1810 &stp
->st_access_bmap
);
1811 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
1812 stp
->st_openstp
= NULL
;
1816 move_to_close_lru(struct nfs4_stateowner
*sop
)
1818 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop
);
1820 list_move_tail(&sop
->so_close_lru
, &close_lru
);
1821 sop
->so_time
= get_seconds();
1825 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
1828 return (sop
->so_owner
.len
== owner
->len
) &&
1829 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
1830 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
1833 static struct nfs4_stateowner
*
1834 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
1836 struct nfs4_stateowner
*so
= NULL
;
1838 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
1839 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
1845 /* search file_hashtbl[] for file */
1846 static struct nfs4_file
*
1847 find_file(struct inode
*ino
)
1849 unsigned int hashval
= file_hashval(ino
);
1850 struct nfs4_file
*fp
;
1852 spin_lock(&recall_lock
);
1853 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
1854 if (fp
->fi_inode
== ino
) {
1856 spin_unlock(&recall_lock
);
1860 spin_unlock(&recall_lock
);
1864 static inline int access_valid(u32 x
, u32 minorversion
)
1866 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
1868 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
1870 x
&= ~NFS4_SHARE_ACCESS_MASK
;
1871 if (minorversion
&& x
) {
1872 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
1874 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
1876 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
1883 static inline int deny_valid(u32 x
)
1885 /* Note: unlike access bits, deny bits may be zero. */
1886 return x
<= NFS4_SHARE_DENY_BOTH
;
1890 * We store the NONE, READ, WRITE, and BOTH bits separately in the
1891 * st_{access,deny}_bmap field of the stateid, in order to track not
1892 * only what share bits are currently in force, but also what
1893 * combinations of share bits previous opens have used. This allows us
1894 * to enforce the recommendation of rfc 3530 14.2.19 that the server
1895 * return an error if the client attempt to downgrade to a combination
1896 * of share bits not explicable by closing some of its previous opens.
1898 * XXX: This enforcement is actually incomplete, since we don't keep
1899 * track of access/deny bit combinations; so, e.g., we allow:
1901 * OPEN allow read, deny write
1902 * OPEN allow both, deny none
1903 * DOWNGRADE allow read, deny none
1905 * which we should reject.
1908 set_access(unsigned int *access
, unsigned long bmap
) {
1912 for (i
= 1; i
< 4; i
++) {
1913 if (test_bit(i
, &bmap
))
1919 set_deny(unsigned int *deny
, unsigned long bmap
) {
1923 for (i
= 0; i
< 4; i
++) {
1924 if (test_bit(i
, &bmap
))
1930 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
1931 unsigned int access
, deny
;
1933 set_access(&access
, stp
->st_access_bmap
);
1934 set_deny(&deny
, stp
->st_deny_bmap
);
1935 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
1941 * Called to check deny when READ with all zero stateid or
1942 * WRITE with all zero or all one stateid
1945 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
1947 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
1948 struct nfs4_file
*fp
;
1949 struct nfs4_stateid
*stp
;
1952 dprintk("NFSD: nfs4_share_conflict\n");
1954 fp
= find_file(ino
);
1957 ret
= nfserr_locked
;
1958 /* Search for conflicting share reservations */
1959 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
1960 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
1961 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
1971 nfs4_file_downgrade(struct file
*filp
, unsigned int share_access
)
1973 if (share_access
& NFS4_SHARE_ACCESS_WRITE
) {
1974 drop_file_write_access(filp
);
1975 spin_lock(&filp
->f_lock
);
1976 filp
->f_mode
= (filp
->f_mode
| FMODE_READ
) & ~FMODE_WRITE
;
1977 spin_unlock(&filp
->f_lock
);
1982 * Spawn a thread to perform a recall on the delegation represented
1983 * by the lease (file_lock)
1985 * Called from break_lease() with lock_kernel() held.
1986 * Note: we assume break_lease will only call this *once* for any given
1990 void nfsd_break_deleg_cb(struct file_lock
*fl
)
1992 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
1994 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp
,fl
);
1998 /* We're assuming the state code never drops its reference
1999 * without first removing the lease. Since we're in this lease
2000 * callback (and since the lease code is serialized by the kernel
2001 * lock) we know the server hasn't removed the lease yet, we know
2002 * it's safe to take a reference: */
2003 atomic_inc(&dp
->dl_count
);
2005 spin_lock(&recall_lock
);
2006 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2007 spin_unlock(&recall_lock
);
2009 /* only place dl_time is set. protected by lock_kernel*/
2010 dp
->dl_time
= get_seconds();
2013 * We don't want the locks code to timeout the lease for us;
2014 * we'll remove it ourself if the delegation isn't returned
2017 fl
->fl_break_time
= 0;
2019 dp
->dl_file
->fi_had_conflict
= true;
2020 nfsd4_cb_recall(dp
);
2024 * The file_lock is being reapd.
2026 * Called by locks_free_lock() with lock_kernel() held.
2029 void nfsd_release_deleg_cb(struct file_lock
*fl
)
2031 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
2033 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl
,dp
, atomic_read(&dp
->dl_count
));
2035 if (!(fl
->fl_flags
& FL_LEASE
) || !dp
)
2037 dp
->dl_flock
= NULL
;
2041 * Set the delegation file_lock back pointer.
2043 * Called from setlease() with lock_kernel() held.
2046 void nfsd_copy_lock_deleg_cb(struct file_lock
*new, struct file_lock
*fl
)
2048 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)new->fl_owner
;
2050 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp
);
2057 * Called from setlease() with lock_kernel() held
2060 int nfsd_same_client_deleg_cb(struct file_lock
*onlist
, struct file_lock
*try)
2062 struct nfs4_delegation
*onlistd
=
2063 (struct nfs4_delegation
*)onlist
->fl_owner
;
2064 struct nfs4_delegation
*tryd
=
2065 (struct nfs4_delegation
*)try->fl_owner
;
2067 if (onlist
->fl_lmops
!= try->fl_lmops
)
2070 return onlistd
->dl_client
== tryd
->dl_client
;
2075 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2078 return lease_modify(onlist
, arg
);
2083 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2084 .fl_break
= nfsd_break_deleg_cb
,
2085 .fl_release_private
= nfsd_release_deleg_cb
,
2086 .fl_copy_lock
= nfsd_copy_lock_deleg_cb
,
2087 .fl_mylease
= nfsd_same_client_deleg_cb
,
2088 .fl_change
= nfsd_change_deleg_cb
,
2093 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2094 struct nfsd4_open
*open
)
2096 clientid_t
*clientid
= &open
->op_clientid
;
2097 struct nfs4_client
*clp
= NULL
;
2098 unsigned int strhashval
;
2099 struct nfs4_stateowner
*sop
= NULL
;
2101 if (!check_name(open
->op_owner
))
2102 return nfserr_inval
;
2104 if (STALE_CLIENTID(&open
->op_clientid
))
2105 return nfserr_stale_clientid
;
2107 strhashval
= ownerstr_hashval(clientid
->cl_id
, open
->op_owner
);
2108 sop
= find_openstateowner_str(strhashval
, open
);
2109 open
->op_stateowner
= sop
;
2111 /* Make sure the client's lease hasn't expired. */
2112 clp
= find_confirmed_client(clientid
);
2114 return nfserr_expired
;
2117 /* When sessions are used, skip open sequenceid processing */
2118 if (nfsd4_has_session(cstate
))
2120 if (!sop
->so_confirmed
) {
2121 /* Replace unconfirmed owners without checking for replay. */
2122 clp
= sop
->so_client
;
2123 release_openowner(sop
);
2124 open
->op_stateowner
= NULL
;
2127 if (open
->op_seqid
== sop
->so_seqid
- 1) {
2128 if (sop
->so_replay
.rp_buflen
)
2129 return nfserr_replay_me
;
2130 /* The original OPEN failed so spectacularly
2131 * that we don't even have replay data saved!
2132 * Therefore, we have no choice but to continue
2133 * processing this OPEN; presumably, we'll
2134 * fail again for the same reason.
2136 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2139 if (open
->op_seqid
!= sop
->so_seqid
)
2140 return nfserr_bad_seqid
;
2142 if (open
->op_stateowner
== NULL
) {
2143 sop
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2145 return nfserr_resource
;
2146 open
->op_stateowner
= sop
;
2148 list_del_init(&sop
->so_close_lru
);
2149 renew_client(sop
->so_client
);
2153 static inline __be32
2154 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2156 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2157 return nfserr_openmode
;
2162 static struct nfs4_delegation
*
2163 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2165 struct nfs4_delegation
*dp
;
2167 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
) {
2168 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
)
2175 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2176 struct nfs4_delegation
**dp
)
2179 __be32 status
= nfserr_bad_stateid
;
2181 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2184 flags
= open
->op_share_access
== NFS4_SHARE_ACCESS_READ
?
2185 RD_STATE
: WR_STATE
;
2186 status
= nfs4_check_delegmode(*dp
, flags
);
2190 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2194 open
->op_stateowner
->so_confirmed
= 1;
2199 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2201 struct nfs4_stateid
*local
;
2202 __be32 status
= nfserr_share_denied
;
2203 struct nfs4_stateowner
*sop
= open
->op_stateowner
;
2205 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2206 /* ignore lock owners */
2207 if (local
->st_stateowner
->so_is_open_owner
== 0)
2209 /* remember if we have seen this open owner */
2210 if (local
->st_stateowner
== sop
)
2212 /* check for conflicting share reservations */
2213 if (!test_share(local
, open
))
2221 static inline struct nfs4_stateid
*
2222 nfs4_alloc_stateid(void)
2224 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2228 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2229 struct nfs4_delegation
*dp
,
2230 struct svc_fh
*cur_fh
, int flags
)
2232 struct nfs4_stateid
*stp
;
2234 stp
= nfs4_alloc_stateid();
2236 return nfserr_resource
;
2239 get_file(dp
->dl_vfs_file
);
2240 stp
->st_vfs_file
= dp
->dl_vfs_file
;
2243 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, flags
,
2246 if (status
== nfserr_dropit
)
2247 status
= nfserr_jukebox
;
2248 kmem_cache_free(stateid_slab
, stp
);
2256 static inline __be32
2257 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2258 struct nfsd4_open
*open
)
2260 struct iattr iattr
= {
2261 .ia_valid
= ATTR_SIZE
,
2264 if (!open
->op_truncate
)
2266 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2267 return nfserr_inval
;
2268 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2272 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2274 struct file
*filp
= stp
->st_vfs_file
;
2275 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
2276 unsigned int share_access
, new_writer
;
2279 set_access(&share_access
, stp
->st_access_bmap
);
2280 new_writer
= (~share_access
) & open
->op_share_access
2281 & NFS4_SHARE_ACCESS_WRITE
;
2284 int err
= get_write_access(inode
);
2286 return nfserrno(err
);
2287 err
= mnt_want_write(cur_fh
->fh_export
->ex_path
.mnt
);
2289 return nfserrno(err
);
2290 file_take_write(filp
);
2292 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2295 put_write_access(inode
);
2298 /* remember the open */
2299 filp
->f_mode
|= open
->op_share_access
;
2300 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
2301 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2308 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2310 open
->op_stateowner
->so_confirmed
= 1;
2311 open
->op_stateowner
->so_client
->cl_firststate
= 1;
2315 * Attempt to hand out a delegation.
2318 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2320 struct nfs4_delegation
*dp
;
2321 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
2322 int cb_up
= atomic_read(&sop
->so_client
->cl_cb_set
);
2323 struct file_lock fl
, *flp
= &fl
;
2324 int status
, flag
= 0;
2326 flag
= NFS4_OPEN_DELEGATE_NONE
;
2327 open
->op_recall
= 0;
2328 switch (open
->op_claim_type
) {
2329 case NFS4_OPEN_CLAIM_PREVIOUS
:
2331 open
->op_recall
= 1;
2332 flag
= open
->op_delegate_type
;
2333 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2336 case NFS4_OPEN_CLAIM_NULL
:
2337 /* Let's not give out any delegations till everyone's
2338 * had the chance to reclaim theirs.... */
2339 if (locks_in_grace())
2341 if (!cb_up
|| !sop
->so_confirmed
)
2343 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2344 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2346 flag
= NFS4_OPEN_DELEGATE_READ
;
2352 dp
= alloc_init_deleg(sop
->so_client
, stp
, fh
, flag
);
2354 flag
= NFS4_OPEN_DELEGATE_NONE
;
2357 locks_init_lock(&fl
);
2358 fl
.fl_lmops
= &nfsd_lease_mng_ops
;
2359 fl
.fl_flags
= FL_LEASE
;
2360 fl
.fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2361 fl
.fl_end
= OFFSET_MAX
;
2362 fl
.fl_owner
= (fl_owner_t
)dp
;
2363 fl
.fl_file
= stp
->st_vfs_file
;
2364 fl
.fl_pid
= current
->tgid
;
2366 /* vfs_setlease checks to see if delegation should be handed out.
2367 * the lock_manager callbacks fl_mylease and fl_change are used
2369 if ((status
= vfs_setlease(stp
->st_vfs_file
, fl
.fl_type
, &flp
))) {
2370 dprintk("NFSD: setlease failed [%d], no delegation\n", status
);
2371 unhash_delegation(dp
);
2372 flag
= NFS4_OPEN_DELEGATE_NONE
;
2376 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2378 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2379 STATEID_VAL(&dp
->dl_stateid
));
2381 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2382 && flag
== NFS4_OPEN_DELEGATE_NONE
2383 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2384 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2385 open
->op_delegate_type
= flag
;
2389 * called with nfs4_lock_state() held.
2392 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2394 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2395 struct nfs4_file
*fp
= NULL
;
2396 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2397 struct nfs4_stateid
*stp
= NULL
;
2398 struct nfs4_delegation
*dp
= NULL
;
2401 status
= nfserr_inval
;
2402 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2403 || !deny_valid(open
->op_share_deny
))
2406 * Lookup file; if found, lookup stateid and check open request,
2407 * and check for delegations in the process of being recalled.
2408 * If not found, create the nfs4_file struct
2410 fp
= find_file(ino
);
2412 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2414 status
= nfs4_check_deleg(fp
, open
, &dp
);
2418 status
= nfserr_bad_stateid
;
2419 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2421 status
= nfserr_resource
;
2422 fp
= alloc_init_file(ino
);
2428 * OPEN the file, or upgrade an existing OPEN.
2429 * If truncate fails, the OPEN fails.
2432 /* Stateid was found, this is an OPEN upgrade */
2433 status
= nfs4_upgrade_open(rqstp
, current_fh
, stp
, open
);
2436 update_stateid(&stp
->st_stateid
);
2438 /* Stateid was not found, this is a new OPEN */
2440 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
2441 flags
|= NFSD_MAY_READ
;
2442 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2443 flags
|= NFSD_MAY_WRITE
;
2444 status
= nfs4_new_open(rqstp
, &stp
, dp
, current_fh
, flags
);
2447 init_stateid(stp
, fp
, open
);
2448 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2450 release_open_stateid(stp
);
2453 if (nfsd4_has_session(&resp
->cstate
))
2454 update_stateid(&stp
->st_stateid
);
2456 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2458 if (nfsd4_has_session(&resp
->cstate
)) {
2459 open
->op_stateowner
->so_confirmed
= 1;
2460 nfsd4_create_clid_dir(open
->op_stateowner
->so_client
);
2464 * Attempt to hand out a delegation. No error return, because the
2465 * OPEN succeeds even if we fail.
2467 nfs4_open_delegation(current_fh
, open
, stp
);
2471 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2472 STATEID_VAL(&stp
->st_stateid
));
2476 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2477 nfs4_set_claim_prev(open
);
2479 * To finish the open response, we just need to set the rflags.
2481 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2482 if (!open
->op_stateowner
->so_confirmed
&&
2483 !nfsd4_has_session(&resp
->cstate
))
2484 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2490 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2493 struct nfs4_client
*clp
;
2497 dprintk("process_renew(%08x/%08x): starting\n",
2498 clid
->cl_boot
, clid
->cl_id
);
2499 status
= nfserr_stale_clientid
;
2500 if (STALE_CLIENTID(clid
))
2502 clp
= find_confirmed_client(clid
);
2503 status
= nfserr_expired
;
2505 /* We assume the client took too long to RENEW. */
2506 dprintk("nfsd4_renew: clientid not found!\n");
2510 status
= nfserr_cb_path_down
;
2511 if (!list_empty(&clp
->cl_delegations
)
2512 && !atomic_read(&clp
->cl_cb_set
))
2516 nfs4_unlock_state();
2520 struct lock_manager nfsd4_manager
= {
2524 nfsd4_end_grace(void)
2526 dprintk("NFSD: end of grace period\n");
2527 nfsd4_recdir_purge_old();
2528 locks_end_grace(&nfsd4_manager
);
2530 * Now that every NFSv4 client has had the chance to recover and
2531 * to see the (possibly new, possibly shorter) lease time, we
2532 * can safely set the next grace time to the current lease time:
2534 nfsd4_grace
= nfsd4_lease
;
2538 nfs4_laundromat(void)
2540 struct nfs4_client
*clp
;
2541 struct nfs4_stateowner
*sop
;
2542 struct nfs4_delegation
*dp
;
2543 struct list_head
*pos
, *next
, reaplist
;
2544 time_t cutoff
= get_seconds() - nfsd4_lease
;
2545 time_t t
, clientid_val
= nfsd4_lease
;
2546 time_t u
, test_val
= nfsd4_lease
;
2550 dprintk("NFSD: laundromat service - starting\n");
2551 if (locks_in_grace())
2553 list_for_each_safe(pos
, next
, &client_lru
) {
2554 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
2555 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
2556 t
= clp
->cl_time
- cutoff
;
2557 if (clientid_val
> t
)
2561 dprintk("NFSD: purging unused client (clientid %08x)\n",
2562 clp
->cl_clientid
.cl_id
);
2563 nfsd4_remove_clid_dir(clp
);
2566 INIT_LIST_HEAD(&reaplist
);
2567 spin_lock(&recall_lock
);
2568 list_for_each_safe(pos
, next
, &del_recall_lru
) {
2569 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2570 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
2571 u
= dp
->dl_time
- cutoff
;
2576 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
2578 list_move(&dp
->dl_recall_lru
, &reaplist
);
2580 spin_unlock(&recall_lock
);
2581 list_for_each_safe(pos
, next
, &reaplist
) {
2582 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
2583 list_del_init(&dp
->dl_recall_lru
);
2584 unhash_delegation(dp
);
2586 test_val
= nfsd4_lease
;
2587 list_for_each_safe(pos
, next
, &close_lru
) {
2588 sop
= list_entry(pos
, struct nfs4_stateowner
, so_close_lru
);
2589 if (time_after((unsigned long)sop
->so_time
, (unsigned long)cutoff
)) {
2590 u
= sop
->so_time
- cutoff
;
2595 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2597 release_openowner(sop
);
2599 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
2600 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
2601 nfs4_unlock_state();
2602 return clientid_val
;
2605 static struct workqueue_struct
*laundry_wq
;
2606 static void laundromat_main(struct work_struct
*);
2607 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
2610 laundromat_main(struct work_struct
*not_used
)
2614 t
= nfs4_laundromat();
2615 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
2616 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
2619 static struct nfs4_stateowner
*
2620 search_close_lru(u32 st_id
, int flags
)
2622 struct nfs4_stateowner
*local
= NULL
;
2624 if (flags
& CLOSE_STATE
) {
2625 list_for_each_entry(local
, &close_lru
, so_close_lru
) {
2626 if (local
->so_id
== st_id
)
2634 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
2636 return fhp
->fh_dentry
->d_inode
!= stp
->st_vfs_file
->f_path
.dentry
->d_inode
;
2640 STALE_STATEID(stateid_t
*stateid
)
2642 if (time_after((unsigned long)boot_time
,
2643 (unsigned long)stateid
->si_boot
)) {
2644 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
2645 STATEID_VAL(stateid
));
2652 EXPIRED_STATEID(stateid_t
*stateid
)
2654 if (time_before((unsigned long)boot_time
,
2655 ((unsigned long)stateid
->si_boot
)) &&
2656 time_before((unsigned long)(stateid
->si_boot
+ nfsd4_lease
), get_seconds())) {
2657 dprintk("NFSD: expired stateid " STATEID_FMT
"!\n",
2658 STATEID_VAL(stateid
));
2665 stateid_error_map(stateid_t
*stateid
)
2667 if (STALE_STATEID(stateid
))
2668 return nfserr_stale_stateid
;
2669 if (EXPIRED_STATEID(stateid
))
2670 return nfserr_expired
;
2672 dprintk("NFSD: bad stateid " STATEID_FMT
"!\n",
2673 STATEID_VAL(stateid
));
2674 return nfserr_bad_stateid
;
2678 access_permit_read(unsigned long access_bmap
)
2680 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
2681 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
2682 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
2686 access_permit_write(unsigned long access_bmap
)
2688 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
2689 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
2693 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
2695 __be32 status
= nfserr_openmode
;
2697 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
2699 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
2706 static inline __be32
2707 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
2709 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
2711 else if (locks_in_grace()) {
2712 /* Answer in remaining cases depends on existance of
2713 * conflicting state; so we must wait out the grace period. */
2714 return nfserr_grace
;
2715 } else if (flags
& WR_STATE
)
2716 return nfs4_share_conflict(current_fh
,
2717 NFS4_SHARE_DENY_WRITE
);
2718 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2719 return nfs4_share_conflict(current_fh
,
2720 NFS4_SHARE_DENY_READ
);
2724 * Allow READ/WRITE during grace period on recovered state only for files
2725 * that are not able to provide mandatory locking.
2728 grace_disallows_io(struct inode
*inode
)
2730 return locks_in_grace() && mandatory_lock(inode
);
2733 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, int flags
)
2736 * When sessions are used the stateid generation number is ignored
2739 if ((flags
& HAS_SESSION
) && in
->si_generation
== 0)
2742 /* If the client sends us a stateid from the future, it's buggy: */
2743 if (in
->si_generation
> ref
->si_generation
)
2744 return nfserr_bad_stateid
;
2746 * The following, however, can happen. For example, if the
2747 * client sends an open and some IO at the same time, the open
2748 * may bump si_generation while the IO is still in flight.
2749 * Thanks to hard links and renames, the client never knows what
2750 * file an open will affect. So it could avoid that situation
2751 * only by serializing all opens and IO from the same open
2752 * owner. To recover from the old_stateid error, the client
2753 * will just have to retry the IO:
2755 if (in
->si_generation
< ref
->si_generation
)
2756 return nfserr_old_stateid
;
2761 static int is_delegation_stateid(stateid_t
*stateid
)
2763 return stateid
->si_fileid
== 0;
2767 * Checks for stateid operations
2770 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
2771 stateid_t
*stateid
, int flags
, struct file
**filpp
)
2773 struct nfs4_stateid
*stp
= NULL
;
2774 struct nfs4_delegation
*dp
= NULL
;
2775 struct svc_fh
*current_fh
= &cstate
->current_fh
;
2776 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2782 if (grace_disallows_io(ino
))
2783 return nfserr_grace
;
2785 if (nfsd4_has_session(cstate
))
2786 flags
|= HAS_SESSION
;
2788 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
2789 return check_special_stateids(current_fh
, stateid
, flags
);
2791 status
= nfserr_stale_stateid
;
2792 if (STALE_STATEID(stateid
))
2795 status
= nfserr_bad_stateid
;
2796 if (is_delegation_stateid(stateid
)) {
2797 dp
= find_delegation_stateid(ino
, stateid
);
2799 status
= stateid_error_map(stateid
);
2802 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
,
2806 status
= nfs4_check_delegmode(dp
, flags
);
2809 renew_client(dp
->dl_client
);
2811 *filpp
= dp
->dl_vfs_file
;
2812 } else { /* open or lock stateid */
2813 stp
= find_stateid(stateid
, flags
);
2815 status
= stateid_error_map(stateid
);
2818 if (nfs4_check_fh(current_fh
, stp
))
2820 if (!stp
->st_stateowner
->so_confirmed
)
2822 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
2826 status
= nfs4_check_openmode(stp
, flags
);
2829 renew_client(stp
->st_stateowner
->so_client
);
2831 *filpp
= stp
->st_vfs_file
;
2841 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
2842 RD_STATE
: WR_STATE
;
2846 * Checks for sequence id mutating operations.
2849 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
2850 stateid_t
*stateid
, int flags
,
2851 struct nfs4_stateowner
**sopp
,
2852 struct nfs4_stateid
**stpp
, struct nfsd4_lock
*lock
)
2854 struct nfs4_stateid
*stp
;
2855 struct nfs4_stateowner
*sop
;
2856 struct svc_fh
*current_fh
= &cstate
->current_fh
;
2859 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
2860 seqid
, STATEID_VAL(stateid
));
2865 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
2866 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
2867 return nfserr_bad_stateid
;
2870 if (STALE_STATEID(stateid
))
2871 return nfserr_stale_stateid
;
2873 if (nfsd4_has_session(cstate
))
2874 flags
|= HAS_SESSION
;
2877 * We return BAD_STATEID if filehandle doesn't match stateid,
2878 * the confirmed flag is incorrecly set, or the generation
2879 * number is incorrect.
2881 stp
= find_stateid(stateid
, flags
);
2884 * Also, we should make sure this isn't just the result of
2887 sop
= search_close_lru(stateid
->si_stateownerid
, flags
);
2889 return stateid_error_map(stateid
);
2895 *sopp
= sop
= stp
->st_stateowner
;
2898 clientid_t
*lockclid
= &lock
->v
.new.clientid
;
2899 struct nfs4_client
*clp
= sop
->so_client
;
2903 lkflg
= setlkflg(lock
->lk_type
);
2905 if (lock
->lk_is_new
) {
2906 if (!sop
->so_is_open_owner
)
2907 return nfserr_bad_stateid
;
2908 if (!(flags
& HAS_SESSION
) &&
2909 !same_clid(&clp
->cl_clientid
, lockclid
))
2910 return nfserr_bad_stateid
;
2911 /* stp is the open stateid */
2912 status
= nfs4_check_openmode(stp
, lkflg
);
2916 /* stp is the lock stateid */
2917 status
= nfs4_check_openmode(stp
->st_openstp
, lkflg
);
2923 if (nfs4_check_fh(current_fh
, stp
)) {
2924 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2925 return nfserr_bad_stateid
;
2929 * We now validate the seqid and stateid generation numbers.
2930 * For the moment, we ignore the possibility of
2931 * generation number wraparound.
2933 if (!(flags
& HAS_SESSION
) && seqid
!= sop
->so_seqid
)
2936 if (sop
->so_confirmed
&& flags
& CONFIRM
) {
2937 dprintk("NFSD: preprocess_seqid_op: expected"
2938 " unconfirmed stateowner!\n");
2939 return nfserr_bad_stateid
;
2941 if (!sop
->so_confirmed
&& !(flags
& CONFIRM
)) {
2942 dprintk("NFSD: preprocess_seqid_op: stateowner not"
2943 " confirmed yet!\n");
2944 return nfserr_bad_stateid
;
2946 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, flags
);
2949 renew_client(sop
->so_client
);
2953 if (seqid
== sop
->so_seqid
- 1) {
2954 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
2955 /* indicate replay to calling function */
2956 return nfserr_replay_me
;
2958 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
2959 sop
->so_seqid
, seqid
);
2961 return nfserr_bad_seqid
;
2965 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2966 struct nfsd4_open_confirm
*oc
)
2969 struct nfs4_stateowner
*sop
;
2970 struct nfs4_stateid
*stp
;
2972 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2973 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
2974 cstate
->current_fh
.fh_dentry
->d_name
.name
);
2976 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
2982 if ((status
= nfs4_preprocess_seqid_op(cstate
,
2983 oc
->oc_seqid
, &oc
->oc_req_stateid
,
2984 CONFIRM
| OPEN_STATE
,
2985 &oc
->oc_stateowner
, &stp
, NULL
)))
2988 sop
= oc
->oc_stateowner
;
2989 sop
->so_confirmed
= 1;
2990 update_stateid(&stp
->st_stateid
);
2991 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2992 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
2993 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
2995 nfsd4_create_clid_dir(sop
->so_client
);
2997 if (oc
->oc_stateowner
) {
2998 nfs4_get_stateowner(oc
->oc_stateowner
);
2999 cstate
->replay_owner
= oc
->oc_stateowner
;
3001 nfs4_unlock_state();
3007 * unset all bits in union bitmap (bmap) that
3008 * do not exist in share (from successful OPEN_DOWNGRADE)
3011 reset_union_bmap_access(unsigned long access
, unsigned long *bmap
)
3014 for (i
= 1; i
< 4; i
++) {
3015 if ((i
& access
) != i
)
3016 __clear_bit(i
, bmap
);
3021 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3024 for (i
= 0; i
< 4; i
++) {
3025 if ((i
& deny
) != i
)
3026 __clear_bit(i
, bmap
);
3031 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3032 struct nfsd4_compound_state
*cstate
,
3033 struct nfsd4_open_downgrade
*od
)
3036 struct nfs4_stateid
*stp
;
3037 unsigned int share_access
;
3039 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3040 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3041 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3043 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3044 || !deny_valid(od
->od_share_deny
))
3045 return nfserr_inval
;
3048 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3052 &od
->od_stateowner
, &stp
, NULL
)))
3055 status
= nfserr_inval
;
3056 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3057 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3058 stp
->st_access_bmap
, od
->od_share_access
);
3061 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3062 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3063 stp
->st_deny_bmap
, od
->od_share_deny
);
3066 set_access(&share_access
, stp
->st_access_bmap
);
3067 nfs4_file_downgrade(stp
->st_vfs_file
,
3068 share_access
& ~od
->od_share_access
);
3070 reset_union_bmap_access(od
->od_share_access
, &stp
->st_access_bmap
);
3071 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3073 update_stateid(&stp
->st_stateid
);
3074 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3077 if (od
->od_stateowner
) {
3078 nfs4_get_stateowner(od
->od_stateowner
);
3079 cstate
->replay_owner
= od
->od_stateowner
;
3081 nfs4_unlock_state();
3086 * nfs4_unlock_state() called after encode
3089 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3090 struct nfsd4_close
*close
)
3093 struct nfs4_stateid
*stp
;
3095 dprintk("NFSD: nfsd4_close on file %.*s\n",
3096 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3097 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3100 /* check close_lru for replay */
3101 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3104 OPEN_STATE
| CLOSE_STATE
,
3105 &close
->cl_stateowner
, &stp
, NULL
)))
3108 update_stateid(&stp
->st_stateid
);
3109 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3111 /* release_stateid() calls nfsd_close() if needed */
3112 release_open_stateid(stp
);
3114 /* place unused nfs4_stateowners on so_close_lru list to be
3115 * released by the laundromat service after the lease period
3116 * to enable us to handle CLOSE replay
3118 if (list_empty(&close
->cl_stateowner
->so_stateids
))
3119 move_to_close_lru(close
->cl_stateowner
);
3121 if (close
->cl_stateowner
) {
3122 nfs4_get_stateowner(close
->cl_stateowner
);
3123 cstate
->replay_owner
= close
->cl_stateowner
;
3125 nfs4_unlock_state();
3130 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3131 struct nfsd4_delegreturn
*dr
)
3133 struct nfs4_delegation
*dp
;
3134 stateid_t
*stateid
= &dr
->dr_stateid
;
3135 struct inode
*inode
;
3139 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3141 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3143 if (nfsd4_has_session(cstate
))
3144 flags
|= HAS_SESSION
;
3146 status
= nfserr_bad_stateid
;
3147 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3149 status
= nfserr_stale_stateid
;
3150 if (STALE_STATEID(stateid
))
3152 status
= nfserr_bad_stateid
;
3153 if (!is_delegation_stateid(stateid
))
3155 dp
= find_delegation_stateid(inode
, stateid
);
3157 status
= stateid_error_map(stateid
);
3160 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, flags
);
3163 renew_client(dp
->dl_client
);
3165 unhash_delegation(dp
);
3167 nfs4_unlock_state();
3174 * Lock owner state (byte-range locks)
3176 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3177 #define LOCK_HASH_BITS 8
3178 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3179 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3182 end_offset(u64 start
, u64 len
)
3187 return end
>= start
? end
: NFS4_MAX_UINT64
;
3190 /* last octet in a range */
3192 last_byte_offset(u64 start
, u64 len
)
3198 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3201 #define lockownerid_hashval(id) \
3202 ((id) & LOCK_HASH_MASK)
3204 static inline unsigned int
3205 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3206 struct xdr_netobj
*ownername
)
3208 return (file_hashval(inode
) + cl_id
3209 + opaque_hashval(ownername
->data
, ownername
->len
))
3213 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3214 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3215 static struct list_head lockstateid_hashtbl
[STATEID_HASH_SIZE
];
3217 static struct nfs4_stateid
*
3218 find_stateid(stateid_t
*stid
, int flags
)
3220 struct nfs4_stateid
*local
;
3221 u32 st_id
= stid
->si_stateownerid
;
3222 u32 f_id
= stid
->si_fileid
;
3223 unsigned int hashval
;
3225 dprintk("NFSD: find_stateid flags 0x%x\n",flags
);
3226 if (flags
& (LOCK_STATE
| RD_STATE
| WR_STATE
)) {
3227 hashval
= stateid_hashval(st_id
, f_id
);
3228 list_for_each_entry(local
, &lockstateid_hashtbl
[hashval
], st_hash
) {
3229 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3230 (local
->st_stateid
.si_fileid
== f_id
))
3235 if (flags
& (OPEN_STATE
| RD_STATE
| WR_STATE
)) {
3236 hashval
= stateid_hashval(st_id
, f_id
);
3237 list_for_each_entry(local
, &stateid_hashtbl
[hashval
], st_hash
) {
3238 if ((local
->st_stateid
.si_stateownerid
== st_id
) &&
3239 (local
->st_stateid
.si_fileid
== f_id
))
3246 static struct nfs4_delegation
*
3247 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3249 struct nfs4_file
*fp
;
3250 struct nfs4_delegation
*dl
;
3252 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3255 fp
= find_file(ino
);
3258 dl
= find_delegation_file(fp
, stid
);
3264 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3265 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3266 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3267 * locking, this prevents us from being completely protocol-compliant. The
3268 * real solution to this problem is to start using unsigned file offsets in
3269 * the VFS, but this is a very deep change!
3272 nfs4_transform_lock_offset(struct file_lock
*lock
)
3274 if (lock
->fl_start
< 0)
3275 lock
->fl_start
= OFFSET_MAX
;
3276 if (lock
->fl_end
< 0)
3277 lock
->fl_end
= OFFSET_MAX
;
3280 /* Hack!: For now, we're defining this just so we can use a pointer to it
3281 * as a unique cookie to identify our (NFSv4's) posix locks. */
3282 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3286 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3288 struct nfs4_stateowner
*sop
;
3291 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3292 sop
= (struct nfs4_stateowner
*) fl
->fl_owner
;
3293 hval
= lockownerid_hashval(sop
->so_id
);
3294 kref_get(&sop
->so_ref
);
3296 deny
->ld_clientid
= sop
->so_client
->cl_clientid
;
3298 deny
->ld_sop
= NULL
;
3299 deny
->ld_clientid
.cl_boot
= 0;
3300 deny
->ld_clientid
.cl_id
= 0;
3302 deny
->ld_start
= fl
->fl_start
;
3303 deny
->ld_length
= NFS4_MAX_UINT64
;
3304 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3305 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3306 deny
->ld_type
= NFS4_READ_LT
;
3307 if (fl
->fl_type
!= F_RDLCK
)
3308 deny
->ld_type
= NFS4_WRITE_LT
;
3311 static struct nfs4_stateowner
*
3312 find_lockstateowner_str(struct inode
*inode
, clientid_t
*clid
,
3313 struct xdr_netobj
*owner
)
3315 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3316 struct nfs4_stateowner
*op
;
3318 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3319 if (same_owner_str(op
, owner
, clid
))
3326 * Alloc a lock owner structure.
3327 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3330 * strhashval = lock_ownerstr_hashval
3333 static struct nfs4_stateowner
*
3334 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3335 struct nfs4_stateowner
*sop
;
3336 struct nfs4_replay
*rp
;
3337 unsigned int idhashval
;
3339 if (!(sop
= alloc_stateowner(&lock
->lk_new_owner
)))
3341 idhashval
= lockownerid_hashval(current_ownerid
);
3342 INIT_LIST_HEAD(&sop
->so_idhash
);
3343 INIT_LIST_HEAD(&sop
->so_strhash
);
3344 INIT_LIST_HEAD(&sop
->so_perclient
);
3345 INIT_LIST_HEAD(&sop
->so_stateids
);
3346 INIT_LIST_HEAD(&sop
->so_perstateid
);
3347 INIT_LIST_HEAD(&sop
->so_close_lru
); /* not used */
3349 list_add(&sop
->so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3350 list_add(&sop
->so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3351 list_add(&sop
->so_perstateid
, &open_stp
->st_lockowners
);
3352 sop
->so_is_open_owner
= 0;
3353 sop
->so_id
= current_ownerid
++;
3354 sop
->so_client
= clp
;
3355 /* It is the openowner seqid that will be incremented in encode in the
3356 * case of new lockowners; so increment the lock seqid manually: */
3357 sop
->so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3358 sop
->so_confirmed
= 1;
3359 rp
= &sop
->so_replay
;
3360 rp
->rp_status
= nfserr_serverfault
;
3362 rp
->rp_buf
= rp
->rp_ibuf
;
3366 static struct nfs4_stateid
*
3367 alloc_init_lock_stateid(struct nfs4_stateowner
*sop
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3369 struct nfs4_stateid
*stp
;
3370 unsigned int hashval
= stateid_hashval(sop
->so_id
, fp
->fi_id
);
3372 stp
= nfs4_alloc_stateid();
3375 INIT_LIST_HEAD(&stp
->st_hash
);
3376 INIT_LIST_HEAD(&stp
->st_perfile
);
3377 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3378 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3379 list_add(&stp
->st_hash
, &lockstateid_hashtbl
[hashval
]);
3380 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3381 list_add(&stp
->st_perstateowner
, &sop
->so_stateids
);
3382 stp
->st_stateowner
= sop
;
3385 stp
->st_stateid
.si_boot
= get_seconds();
3386 stp
->st_stateid
.si_stateownerid
= sop
->so_id
;
3387 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3388 stp
->st_stateid
.si_generation
= 0;
3389 stp
->st_vfs_file
= open_stp
->st_vfs_file
; /* FIXME refcount?? */
3390 stp
->st_access_bmap
= open_stp
->st_access_bmap
;
3391 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3392 stp
->st_openstp
= open_stp
;
3399 check_lock_length(u64 offset
, u64 length
)
3401 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3402 LOFF_OVERFLOW(offset
, length
)));
3409 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3410 struct nfsd4_lock
*lock
)
3412 struct nfs4_stateowner
*open_sop
= NULL
;
3413 struct nfs4_stateowner
*lock_sop
= NULL
;
3414 struct nfs4_stateid
*lock_stp
;
3416 struct file_lock file_lock
;
3417 struct file_lock conflock
;
3419 unsigned int strhashval
;
3423 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3424 (long long) lock
->lk_offset
,
3425 (long long) lock
->lk_length
);
3427 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3428 return nfserr_inval
;
3430 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3431 S_IFREG
, NFSD_MAY_LOCK
))) {
3432 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3438 if (lock
->lk_is_new
) {
3440 * Client indicates that this is a new lockowner.
3441 * Use open owner and open stateid to create lock owner and
3444 struct nfs4_stateid
*open_stp
= NULL
;
3445 struct nfs4_file
*fp
;
3447 status
= nfserr_stale_clientid
;
3448 if (!nfsd4_has_session(cstate
) &&
3449 STALE_CLIENTID(&lock
->lk_new_clientid
))
3452 /* validate and update open stateid and open seqid */
3453 status
= nfs4_preprocess_seqid_op(cstate
,
3454 lock
->lk_new_open_seqid
,
3455 &lock
->lk_new_open_stateid
,
3457 &lock
->lk_replay_owner
, &open_stp
,
3461 open_sop
= lock
->lk_replay_owner
;
3462 /* create lockowner and lock stateid */
3463 fp
= open_stp
->st_file
;
3464 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3465 open_sop
->so_client
->cl_clientid
.cl_id
,
3466 &lock
->v
.new.owner
);
3467 /* XXX: Do we need to check for duplicate stateowners on
3468 * the same file, or should they just be allowed (and
3469 * create new stateids)? */
3470 status
= nfserr_resource
;
3471 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3472 open_sop
->so_client
, open_stp
, lock
);
3473 if (lock_sop
== NULL
)
3475 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3476 if (lock_stp
== NULL
)
3479 /* lock (lock owner + lock stateid) already exists */
3480 status
= nfs4_preprocess_seqid_op(cstate
,
3481 lock
->lk_old_lock_seqid
,
3482 &lock
->lk_old_lock_stateid
,
3484 &lock
->lk_replay_owner
, &lock_stp
, lock
);
3487 lock_sop
= lock
->lk_replay_owner
;
3489 /* lock->lk_replay_owner and lock_stp have been created or found */
3490 filp
= lock_stp
->st_vfs_file
;
3492 status
= nfserr_grace
;
3493 if (locks_in_grace() && !lock
->lk_reclaim
)
3495 status
= nfserr_no_grace
;
3496 if (!locks_in_grace() && lock
->lk_reclaim
)
3499 locks_init_lock(&file_lock
);
3500 switch (lock
->lk_type
) {
3503 file_lock
.fl_type
= F_RDLCK
;
3507 case NFS4_WRITEW_LT
:
3508 file_lock
.fl_type
= F_WRLCK
;
3512 status
= nfserr_inval
;
3515 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
3516 file_lock
.fl_pid
= current
->tgid
;
3517 file_lock
.fl_file
= filp
;
3518 file_lock
.fl_flags
= FL_POSIX
;
3519 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3521 file_lock
.fl_start
= lock
->lk_offset
;
3522 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
3523 nfs4_transform_lock_offset(&file_lock
);
3526 * Try to lock the file in the VFS.
3527 * Note: locks.c uses the BKL to protect the inode's lock list.
3530 err
= vfs_lock_file(filp
, cmd
, &file_lock
, &conflock
);
3532 case 0: /* success! */
3533 update_stateid(&lock_stp
->st_stateid
);
3534 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
3538 case (EAGAIN
): /* conflock holds conflicting lock */
3539 status
= nfserr_denied
;
3540 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3541 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
3544 status
= nfserr_deadlock
;
3547 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
3548 status
= nfserr_resource
;
3552 if (status
&& lock
->lk_is_new
&& lock_sop
)
3553 release_lockowner(lock_sop
);
3554 if (lock
->lk_replay_owner
) {
3555 nfs4_get_stateowner(lock
->lk_replay_owner
);
3556 cstate
->replay_owner
= lock
->lk_replay_owner
;
3558 nfs4_unlock_state();
3563 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3564 * so we do a temporary open here just to get an open file to pass to
3565 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3568 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
3573 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
3576 err
= vfs_test_lock(file
, lock
);
3585 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3586 struct nfsd4_lockt
*lockt
)
3588 struct inode
*inode
;
3589 struct file_lock file_lock
;
3593 if (locks_in_grace())
3594 return nfserr_grace
;
3596 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
3597 return nfserr_inval
;
3599 lockt
->lt_stateowner
= NULL
;
3602 status
= nfserr_stale_clientid
;
3603 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
3606 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0))) {
3607 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
3608 if (status
== nfserr_symlink
)
3609 status
= nfserr_inval
;
3613 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3614 locks_init_lock(&file_lock
);
3615 switch (lockt
->lt_type
) {
3618 file_lock
.fl_type
= F_RDLCK
;
3621 case NFS4_WRITEW_LT
:
3622 file_lock
.fl_type
= F_WRLCK
;
3625 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
3626 status
= nfserr_inval
;
3630 lockt
->lt_stateowner
= find_lockstateowner_str(inode
,
3631 &lockt
->lt_clientid
, &lockt
->lt_owner
);
3632 if (lockt
->lt_stateowner
)
3633 file_lock
.fl_owner
= (fl_owner_t
)lockt
->lt_stateowner
;
3634 file_lock
.fl_pid
= current
->tgid
;
3635 file_lock
.fl_flags
= FL_POSIX
;
3637 file_lock
.fl_start
= lockt
->lt_offset
;
3638 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
3640 nfs4_transform_lock_offset(&file_lock
);
3643 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
3645 status
= nfserrno(error
);
3648 if (file_lock
.fl_type
!= F_UNLCK
) {
3649 status
= nfserr_denied
;
3650 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
3653 nfs4_unlock_state();
3658 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3659 struct nfsd4_locku
*locku
)
3661 struct nfs4_stateid
*stp
;
3662 struct file
*filp
= NULL
;
3663 struct file_lock file_lock
;
3667 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
3668 (long long) locku
->lu_offset
,
3669 (long long) locku
->lu_length
);
3671 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
3672 return nfserr_inval
;
3676 if ((status
= nfs4_preprocess_seqid_op(cstate
,
3680 &locku
->lu_stateowner
, &stp
, NULL
)))
3683 filp
= stp
->st_vfs_file
;
3685 locks_init_lock(&file_lock
);
3686 file_lock
.fl_type
= F_UNLCK
;
3687 file_lock
.fl_owner
= (fl_owner_t
) locku
->lu_stateowner
;
3688 file_lock
.fl_pid
= current
->tgid
;
3689 file_lock
.fl_file
= filp
;
3690 file_lock
.fl_flags
= FL_POSIX
;
3691 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
3692 file_lock
.fl_start
= locku
->lu_offset
;
3694 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
3695 nfs4_transform_lock_offset(&file_lock
);
3698 * Try to unlock the file in the VFS.
3700 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
3702 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
3706 * OK, unlock succeeded; the only thing left to do is update the stateid.
3708 update_stateid(&stp
->st_stateid
);
3709 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3712 if (locku
->lu_stateowner
) {
3713 nfs4_get_stateowner(locku
->lu_stateowner
);
3714 cstate
->replay_owner
= locku
->lu_stateowner
;
3716 nfs4_unlock_state();
3720 status
= nfserrno(err
);
3726 * 1: locks held by lockowner
3727 * 0: no locks held by lockowner
3730 check_for_locks(struct file
*filp
, struct nfs4_stateowner
*lowner
)
3732 struct file_lock
**flpp
;
3733 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
3737 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
3738 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
3749 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
3750 struct nfsd4_compound_state
*cstate
,
3751 struct nfsd4_release_lockowner
*rlockowner
)
3753 clientid_t
*clid
= &rlockowner
->rl_clientid
;
3754 struct nfs4_stateowner
*sop
;
3755 struct nfs4_stateid
*stp
;
3756 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
3757 struct list_head matches
;
3761 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3762 clid
->cl_boot
, clid
->cl_id
);
3764 /* XXX check for lease expiration */
3766 status
= nfserr_stale_clientid
;
3767 if (STALE_CLIENTID(clid
))
3772 status
= nfserr_locks_held
;
3773 /* XXX: we're doing a linear search through all the lockowners.
3774 * Yipes! For now we'll just hope clients aren't really using
3775 * release_lockowner much, but eventually we have to fix these
3776 * data structures. */
3777 INIT_LIST_HEAD(&matches
);
3778 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3779 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
3780 if (!same_owner_str(sop
, owner
, clid
))
3782 list_for_each_entry(stp
, &sop
->so_stateids
,
3784 if (check_for_locks(stp
->st_vfs_file
, sop
))
3786 /* Note: so_perclient unused for lockowners,
3787 * so it's OK to fool with here. */
3788 list_add(&sop
->so_perclient
, &matches
);
3792 /* Clients probably won't expect us to return with some (but not all)
3793 * of the lockowner state released; so don't release any until all
3794 * have been checked. */
3796 while (!list_empty(&matches
)) {
3797 sop
= list_entry(matches
.next
, struct nfs4_stateowner
,
3799 /* unhash_stateowner deletes so_perclient only
3800 * for openowners. */
3801 list_del(&sop
->so_perclient
);
3802 release_lockowner(sop
);
3805 nfs4_unlock_state();
3809 static inline struct nfs4_client_reclaim
*
3812 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
3816 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
3818 unsigned int strhashval
= clientstr_hashval(name
);
3819 struct nfs4_client
*clp
;
3821 clp
= find_confirmed_client_by_str(name
, strhashval
, use_exchange_id
);
3826 * failure => all reset bets are off, nfserr_no_grace...
3829 nfs4_client_to_reclaim(const char *name
)
3831 unsigned int strhashval
;
3832 struct nfs4_client_reclaim
*crp
= NULL
;
3834 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
3835 crp
= alloc_reclaim();
3838 strhashval
= clientstr_hashval(name
);
3839 INIT_LIST_HEAD(&crp
->cr_strhash
);
3840 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
3841 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
3842 reclaim_str_hashtbl_size
++;
3847 nfs4_release_reclaim(void)
3849 struct nfs4_client_reclaim
*crp
= NULL
;
3852 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3853 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
3854 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
3855 struct nfs4_client_reclaim
, cr_strhash
);
3856 list_del(&crp
->cr_strhash
);
3858 reclaim_str_hashtbl_size
--;
3861 BUG_ON(reclaim_str_hashtbl_size
);
3865 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3866 static struct nfs4_client_reclaim
*
3867 nfs4_find_reclaim_client(clientid_t
*clid
)
3869 unsigned int strhashval
;
3870 struct nfs4_client
*clp
;
3871 struct nfs4_client_reclaim
*crp
= NULL
;
3874 /* find clientid in conf_id_hashtbl */
3875 clp
= find_confirmed_client(clid
);
3879 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3880 clp
->cl_name
.len
, clp
->cl_name
.data
,
3883 /* find clp->cl_name in reclaim_str_hashtbl */
3884 strhashval
= clientstr_hashval(clp
->cl_recdir
);
3885 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
3886 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
3894 * Called from OPEN. Look for clientid in reclaim list.
3897 nfs4_check_open_reclaim(clientid_t
*clid
)
3899 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
3902 /* initialization to perform at module load time: */
3905 nfs4_state_init(void)
3909 status
= nfsd4_init_slabs();
3912 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
3913 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
3914 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
3915 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
3916 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
3917 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
3919 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
3920 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
3921 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3922 INIT_LIST_HEAD(&file_hashtbl
[i
]);
3924 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
3925 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
3926 INIT_LIST_HEAD(&ownerid_hashtbl
[i
]);
3928 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++) {
3929 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
3930 INIT_LIST_HEAD(&lockstateid_hashtbl
[i
]);
3932 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
3933 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
3934 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
3936 memset(&onestateid
, ~0, sizeof(stateid_t
));
3937 INIT_LIST_HEAD(&close_lru
);
3938 INIT_LIST_HEAD(&client_lru
);
3939 INIT_LIST_HEAD(&del_recall_lru
);
3940 reclaim_str_hashtbl_size
= 0;
3945 nfsd4_load_reboot_recovery_data(void)
3950 nfsd4_init_recdir(user_recovery_dirname
);
3951 status
= nfsd4_recdir_load();
3952 nfs4_unlock_state();
3954 printk("NFSD: Failure reading reboot recovery data\n");
3958 * Since the lifetime of a delegation isn't limited to that of an open, a
3959 * client may quite reasonably hang on to a delegation as long as it has
3960 * the inode cached. This becomes an obvious problem the first time a
3961 * client's inode cache approaches the size of the server's total memory.
3963 * For now we avoid this problem by imposing a hard limit on the number
3964 * of delegations, which varies according to the server's memory size.
3967 set_max_delegations(void)
3970 * Allow at most 4 delegations per megabyte of RAM. Quick
3971 * estimates suggest that in the worst case (where every delegation
3972 * is for a different inode), a delegation could take about 1.5K,
3973 * giving a worst case usage of about 6% of memory.
3975 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
3978 /* initialization to perform when the nfsd service is started: */
3981 __nfs4_state_start(void)
3985 boot_time
= get_seconds();
3986 locks_start_grace(&nfsd4_manager
);
3987 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
3989 ret
= set_callback_cred();
3992 laundry_wq
= create_singlethread_workqueue("nfsd4");
3993 if (laundry_wq
== NULL
)
3995 ret
= nfsd4_create_callback_queue();
3997 goto out_free_laundry
;
3998 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
3999 set_max_delegations();
4002 destroy_workqueue(laundry_wq
);
4007 nfs4_state_start(void)
4013 nfsd4_load_reboot_recovery_data();
4014 ret
= __nfs4_state_start();
4022 __nfs4_state_shutdown(void)
4025 struct nfs4_client
*clp
= NULL
;
4026 struct nfs4_delegation
*dp
= NULL
;
4027 struct list_head
*pos
, *next
, reaplist
;
4029 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4030 while (!list_empty(&conf_id_hashtbl
[i
])) {
4031 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4034 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4035 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4039 INIT_LIST_HEAD(&reaplist
);
4040 spin_lock(&recall_lock
);
4041 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4042 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4043 list_move(&dp
->dl_recall_lru
, &reaplist
);
4045 spin_unlock(&recall_lock
);
4046 list_for_each_safe(pos
, next
, &reaplist
) {
4047 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4048 list_del_init(&dp
->dl_recall_lru
);
4049 unhash_delegation(dp
);
4052 nfsd4_shutdown_recdir();
4057 nfs4_state_shutdown(void)
4059 cancel_rearming_delayed_workqueue(laundry_wq
, &laundromat_work
);
4060 destroy_workqueue(laundry_wq
);
4061 locks_end_grace(&nfsd4_manager
);
4063 nfs4_release_reclaim();
4064 __nfs4_state_shutdown();
4065 nfsd4_destroy_callback_queue();
4066 nfs4_unlock_state();
4070 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4071 * accessed when nfsd is starting.
4074 nfs4_set_recdir(char *recdir
)
4076 strcpy(user_recovery_dirname
, recdir
);
4080 * Change the NFSv4 recovery directory to recdir.
4083 nfs4_reset_recoverydir(char *recdir
)
4088 status
= kern_path(recdir
, LOOKUP_FOLLOW
, &path
);
4092 if (S_ISDIR(path
.dentry
->d_inode
->i_mode
)) {
4093 nfs4_set_recdir(recdir
);
4101 nfs4_recoverydir(void)
4103 return user_recovery_dirname
;