2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/clnt.h>
46 #include "current_stateid.h"
47 #include "fault_inject.h"
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 time_t nfsd4_lease
= 90; /* default lease time */
55 time_t nfsd4_grace
= 90;
57 #define all_ones {{~0,~0},~0}
58 static const stateid_t one_stateid
= {
60 .si_opaque
= all_ones
,
62 static const stateid_t zero_stateid
= {
65 static const stateid_t currentstateid
= {
69 static u64 current_sessionid
= 1;
71 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
72 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
73 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
80 /* Currently used for almost all code touching nfsv4 state: */
81 static DEFINE_MUTEX(client_mutex
);
84 * Currently used for the del_recall_lru and file hash table. In an
85 * effort to decrease the scope of the client_mutex, this spinlock may
86 * eventually cover more:
88 static DEFINE_SPINLOCK(recall_lock
);
90 static struct kmem_cache
*openowner_slab
= NULL
;
91 static struct kmem_cache
*lockowner_slab
= NULL
;
92 static struct kmem_cache
*file_slab
= NULL
;
93 static struct kmem_cache
*stateid_slab
= NULL
;
94 static struct kmem_cache
*deleg_slab
= NULL
;
99 mutex_lock(&client_mutex
);
102 static void free_session(struct kref
*);
104 /* Must be called under the client_lock */
105 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
107 kref_put(&ses
->se_ref
, free_session
);
110 static void nfsd4_get_session(struct nfsd4_session
*ses
)
112 kref_get(&ses
->se_ref
);
116 nfs4_unlock_state(void)
118 mutex_unlock(&client_mutex
);
122 opaque_hashval(const void *ptr
, int nbytes
)
124 unsigned char *cptr
= (unsigned char *) ptr
;
134 static struct list_head del_recall_lru
;
136 static void nfsd4_free_file(struct nfs4_file
*f
)
138 kmem_cache_free(file_slab
, f
);
142 put_nfs4_file(struct nfs4_file
*fi
)
144 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
145 list_del(&fi
->fi_hash
);
146 spin_unlock(&recall_lock
);
153 get_nfs4_file(struct nfs4_file
*fi
)
155 atomic_inc(&fi
->fi_ref
);
158 static int num_delegations
;
159 unsigned int max_delegations
;
162 * Open owner state (share locks)
165 /* hash tables for lock and open owners */
166 #define OWNER_HASH_BITS 8
167 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
168 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
170 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
174 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
176 return ret
& OWNER_HASH_MASK
;
179 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
181 /* hash table for nfs4_file */
182 #define FILE_HASH_BITS 8
183 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
185 static unsigned int file_hashval(struct inode
*ino
)
187 /* XXX: why are we hashing on inode pointer, anyway? */
188 return hash_ptr(ino
, FILE_HASH_BITS
);
191 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
193 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
195 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
196 atomic_inc(&fp
->fi_access
[oflag
]);
199 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
201 if (oflag
== O_RDWR
) {
202 __nfs4_file_get_access(fp
, O_RDONLY
);
203 __nfs4_file_get_access(fp
, O_WRONLY
);
205 __nfs4_file_get_access(fp
, oflag
);
208 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
210 if (fp
->fi_fds
[oflag
]) {
211 fput(fp
->fi_fds
[oflag
]);
212 fp
->fi_fds
[oflag
] = NULL
;
216 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
218 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
219 nfs4_file_put_fd(fp
, oflag
);
221 * It's also safe to get rid of the RDWR open *if*
222 * we no longer have need of the other kind of access
223 * or if we already have the other kind of open:
225 if (fp
->fi_fds
[1-oflag
]
226 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
227 nfs4_file_put_fd(fp
, O_RDWR
);
231 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
233 if (oflag
== O_RDWR
) {
234 __nfs4_file_put_access(fp
, O_RDONLY
);
235 __nfs4_file_put_access(fp
, O_WRONLY
);
237 __nfs4_file_put_access(fp
, oflag
);
240 static inline int get_new_stid(struct nfs4_stid
*stid
)
242 static int min_stateid
= 0;
243 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
247 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
249 * Note: the necessary preallocation was done in
250 * nfs4_alloc_stateid(). The idr code caps the number of
251 * preallocations that can exist at a time, but the state lock
252 * prevents anyone from using ours before we get here:
256 * It shouldn't be a problem to reuse an opaque stateid value.
257 * I don't think it is for 4.1. But with 4.0 I worry that, for
258 * example, a stray write retransmission could be accepted by
259 * the server when it should have been rejected. Therefore,
260 * adopt a trick from the sctp code to attempt to maximize the
261 * amount of time until an id is reused, by ensuring they always
262 * "increase" (mod INT_MAX):
265 min_stateid
= new_stid
+1;
266 if (min_stateid
== INT_MAX
)
271 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
273 stateid_t
*s
= &stid
->sc_stateid
;
276 stid
->sc_type
= type
;
277 stid
->sc_client
= cl
;
278 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
279 new_id
= get_new_stid(stid
);
280 s
->si_opaque
.so_id
= (u32
)new_id
;
281 /* Will be incremented before return to client: */
282 s
->si_generation
= 0;
285 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
287 struct idr
*stateids
= &cl
->cl_stateids
;
289 if (!idr_pre_get(stateids
, GFP_KERNEL
))
292 * Note: if we fail here (or any time between now and the time
293 * we actually get the new idr), we won't need to undo the idr
294 * preallocation, since the idr code caps the number of
295 * preallocated entries.
297 return kmem_cache_alloc(slab
, GFP_KERNEL
);
300 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
302 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
305 static struct nfs4_delegation
*
306 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
308 struct nfs4_delegation
*dp
;
309 struct nfs4_file
*fp
= stp
->st_file
;
311 dprintk("NFSD alloc_init_deleg\n");
313 * Major work on the lease subsystem (for example, to support
314 * calbacks on stat) will be required before we can support
315 * write delegations properly.
317 if (type
!= NFS4_OPEN_DELEGATE_READ
)
319 if (fp
->fi_had_conflict
)
321 if (num_delegations
> max_delegations
)
323 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
326 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
328 * delegation seqid's are never incremented. The 4.1 special
329 * meaning of seqid 0 isn't meaningful, really, but let's avoid
330 * 0 anyway just for consistency and use 1:
332 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
334 INIT_LIST_HEAD(&dp
->dl_perfile
);
335 INIT_LIST_HEAD(&dp
->dl_perclnt
);
336 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
340 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
342 atomic_set(&dp
->dl_count
, 1);
343 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
348 nfs4_put_delegation(struct nfs4_delegation
*dp
)
350 if (atomic_dec_and_test(&dp
->dl_count
)) {
351 dprintk("NFSD: freeing dp %p\n",dp
);
352 put_nfs4_file(dp
->dl_file
);
353 kmem_cache_free(deleg_slab
, dp
);
358 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
360 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
361 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
363 fput(fp
->fi_deleg_file
);
364 fp
->fi_deleg_file
= NULL
;
368 static void unhash_stid(struct nfs4_stid
*s
)
370 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
372 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
375 /* Called under the state lock. */
377 unhash_delegation(struct nfs4_delegation
*dp
)
379 unhash_stid(&dp
->dl_stid
);
380 list_del_init(&dp
->dl_perclnt
);
381 spin_lock(&recall_lock
);
382 list_del_init(&dp
->dl_perfile
);
383 list_del_init(&dp
->dl_recall_lru
);
384 spin_unlock(&recall_lock
);
385 nfs4_put_deleg_lease(dp
->dl_file
);
386 nfs4_put_delegation(dp
);
393 /* client_lock protects the client lru list and session hash table */
394 static DEFINE_SPINLOCK(client_lock
);
396 /* Hash tables for nfs4_clientid state */
397 #define CLIENT_HASH_BITS 4
398 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
399 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
401 static unsigned int clientid_hashval(u32 id
)
403 return id
& CLIENT_HASH_MASK
;
406 static unsigned int clientstr_hashval(const char *name
)
408 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
412 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
413 * used in reboot/reset lease grace period processing
415 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
416 * setclientid_confirmed info.
418 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
421 * client_lru holds client queue ordered by nfs4_client.cl_time
424 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
425 * for last close replay.
427 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
428 static int reclaim_str_hashtbl_size
= 0;
429 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
430 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
431 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
432 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
433 static struct list_head client_lru
;
434 static struct list_head close_lru
;
437 * We store the NONE, READ, WRITE, and BOTH bits separately in the
438 * st_{access,deny}_bmap field of the stateid, in order to track not
439 * only what share bits are currently in force, but also what
440 * combinations of share bits previous opens have used. This allows us
441 * to enforce the recommendation of rfc 3530 14.2.19 that the server
442 * return an error if the client attempt to downgrade to a combination
443 * of share bits not explicable by closing some of its previous opens.
445 * XXX: This enforcement is actually incomplete, since we don't keep
446 * track of access/deny bit combinations; so, e.g., we allow:
448 * OPEN allow read, deny write
449 * OPEN allow both, deny none
450 * DOWNGRADE allow read, deny none
452 * which we should reject.
455 bmap_to_share_mode(unsigned long bmap
) {
457 unsigned int access
= 0;
459 for (i
= 1; i
< 4; i
++) {
460 if (test_bit(i
, &bmap
))
467 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
468 unsigned int access
, deny
;
470 access
= bmap_to_share_mode(stp
->st_access_bmap
);
471 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
472 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
477 /* set share access for a given stateid */
479 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
481 __set_bit(access
, &stp
->st_access_bmap
);
484 /* clear share access for a given stateid */
486 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
488 __clear_bit(access
, &stp
->st_access_bmap
);
491 /* test whether a given stateid has access */
493 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
495 return test_bit(access
, &stp
->st_access_bmap
);
498 /* set share deny for a given stateid */
500 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
502 __set_bit(access
, &stp
->st_deny_bmap
);
505 /* clear share deny for a given stateid */
507 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
509 __clear_bit(access
, &stp
->st_deny_bmap
);
512 /* test whether a given stateid is denying specific access */
514 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
516 return test_bit(access
, &stp
->st_deny_bmap
);
519 static int nfs4_access_to_omode(u32 access
)
521 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
522 case NFS4_SHARE_ACCESS_READ
:
524 case NFS4_SHARE_ACCESS_WRITE
:
526 case NFS4_SHARE_ACCESS_BOTH
:
532 /* release all access and file references for a given stateid */
534 release_all_access(struct nfs4_ol_stateid
*stp
)
538 for (i
= 1; i
< 4; i
++) {
539 if (test_access(i
, stp
))
540 nfs4_file_put_access(stp
->st_file
,
541 nfs4_access_to_omode(i
));
542 clear_access(i
, stp
);
546 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
548 list_del(&stp
->st_perfile
);
549 list_del(&stp
->st_perstateowner
);
552 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
554 release_all_access(stp
);
555 put_nfs4_file(stp
->st_file
);
559 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
561 kmem_cache_free(stateid_slab
, stp
);
564 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
568 unhash_generic_stateid(stp
);
569 unhash_stid(&stp
->st_stid
);
570 file
= find_any_file(stp
->st_file
);
572 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
573 close_generic_stateid(stp
);
574 free_generic_stateid(stp
);
577 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
579 struct nfs4_ol_stateid
*stp
;
581 list_del(&lo
->lo_owner
.so_strhash
);
582 list_del(&lo
->lo_perstateid
);
583 list_del(&lo
->lo_owner_ino_hash
);
584 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
585 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
586 struct nfs4_ol_stateid
, st_perstateowner
);
587 release_lock_stateid(stp
);
591 static void release_lockowner(struct nfs4_lockowner
*lo
)
593 unhash_lockowner(lo
);
594 nfs4_free_lockowner(lo
);
598 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
600 struct nfs4_lockowner
*lo
;
602 while (!list_empty(&open_stp
->st_lockowners
)) {
603 lo
= list_entry(open_stp
->st_lockowners
.next
,
604 struct nfs4_lockowner
, lo_perstateid
);
605 release_lockowner(lo
);
609 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
611 unhash_generic_stateid(stp
);
612 release_stateid_lockowners(stp
);
613 close_generic_stateid(stp
);
616 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
618 unhash_open_stateid(stp
);
619 unhash_stid(&stp
->st_stid
);
620 free_generic_stateid(stp
);
623 static void unhash_openowner(struct nfs4_openowner
*oo
)
625 struct nfs4_ol_stateid
*stp
;
627 list_del(&oo
->oo_owner
.so_strhash
);
628 list_del(&oo
->oo_perclient
);
629 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
630 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
631 struct nfs4_ol_stateid
, st_perstateowner
);
632 release_open_stateid(stp
);
636 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
638 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
641 unhash_stid(&s
->st_stid
);
642 free_generic_stateid(s
);
643 oo
->oo_last_closed_stid
= NULL
;
647 static void release_openowner(struct nfs4_openowner
*oo
)
649 unhash_openowner(oo
);
650 list_del(&oo
->oo_close_lru
);
651 release_last_closed_stateid(oo
);
652 nfs4_free_openowner(oo
);
655 #define SESSION_HASH_SIZE 512
656 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
659 hash_sessionid(struct nfs4_sessionid
*sessionid
)
661 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
663 return sid
->sequence
% SESSION_HASH_SIZE
;
668 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
670 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
671 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
675 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
682 gen_sessionid(struct nfsd4_session
*ses
)
684 struct nfs4_client
*clp
= ses
->se_client
;
685 struct nfsd4_sessionid
*sid
;
687 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
688 sid
->clientid
= clp
->cl_clientid
;
689 sid
->sequence
= current_sessionid
++;
694 * The protocol defines ca_maxresponssize_cached to include the size of
695 * the rpc header, but all we need to cache is the data starting after
696 * the end of the initial SEQUENCE operation--the rest we regenerate
697 * each time. Therefore we can advertise a ca_maxresponssize_cached
698 * value that is the number of bytes in our cache plus a few additional
699 * bytes. In order to stay on the safe side, and not promise more than
700 * we can cache, those additional bytes must be the minimum possible: 24
701 * bytes of rpc header (xid through accept state, with AUTH_NULL
702 * verifier), 12 for the compound header (with zero-length tag), and 44
703 * for the SEQUENCE op response:
705 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
708 free_session_slots(struct nfsd4_session
*ses
)
712 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
713 kfree(ses
->se_slots
[i
]);
717 * We don't actually need to cache the rpc and session headers, so we
718 * can allocate a little less for each slot:
720 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
722 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
725 static int nfsd4_sanitize_slot_size(u32 size
)
727 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
728 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
734 * XXX: If we run out of reserved DRC memory we could (up to a point)
735 * re-negotiate active sessions and reduce their slot usage to make
736 * room for new connections. For now we just fail the create session.
738 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
742 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
744 spin_lock(&nfsd_drc_lock
);
745 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
746 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
747 num
= min_t(int, num
, avail
/ slotsize
);
748 nfsd_drc_mem_used
+= num
* slotsize
;
749 spin_unlock(&nfsd_drc_lock
);
754 static void nfsd4_put_drc_mem(int slotsize
, int num
)
756 spin_lock(&nfsd_drc_lock
);
757 nfsd_drc_mem_used
-= slotsize
* num
;
758 spin_unlock(&nfsd_drc_lock
);
761 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
763 struct nfsd4_session
*new;
766 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
767 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
768 mem
= numslots
* sizeof(struct nfsd4_slot
*);
770 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
773 /* allocate each struct nfsd4_slot and data cache in one piece */
774 for (i
= 0; i
< numslots
; i
++) {
775 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
776 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
777 if (!new->se_slots
[i
])
783 kfree(new->se_slots
[i
]);
788 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
790 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
792 new->maxreqs
= numslots
;
793 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
794 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
795 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
796 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
797 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
800 static void free_conn(struct nfsd4_conn
*c
)
802 svc_xprt_put(c
->cn_xprt
);
806 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
808 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
809 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
811 spin_lock(&clp
->cl_lock
);
812 if (!list_empty(&c
->cn_persession
)) {
813 list_del(&c
->cn_persession
);
816 spin_unlock(&clp
->cl_lock
);
817 nfsd4_probe_callback(clp
);
820 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
822 struct nfsd4_conn
*conn
;
824 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
827 svc_xprt_get(rqstp
->rq_xprt
);
828 conn
->cn_xprt
= rqstp
->rq_xprt
;
829 conn
->cn_flags
= flags
;
830 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
834 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
836 conn
->cn_session
= ses
;
837 list_add(&conn
->cn_persession
, &ses
->se_conns
);
840 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
842 struct nfs4_client
*clp
= ses
->se_client
;
844 spin_lock(&clp
->cl_lock
);
845 __nfsd4_hash_conn(conn
, ses
);
846 spin_unlock(&clp
->cl_lock
);
849 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
851 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
852 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
855 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
857 struct nfsd4_conn
*conn
;
860 conn
= alloc_conn(rqstp
, dir
);
862 return nfserr_jukebox
;
863 nfsd4_hash_conn(conn
, ses
);
864 ret
= nfsd4_register_conn(conn
);
866 /* oops; xprt is already down: */
867 nfsd4_conn_lost(&conn
->cn_xpt_user
);
868 if (ses
->se_client
->cl_cb_state
== NFSD4_CB_DOWN
&&
869 dir
& NFS4_CDFC4_BACK
) {
870 /* callback channel may be back up */
871 nfsd4_probe_callback(ses
->se_client
);
876 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
878 u32 dir
= NFS4_CDFC4_FORE
;
880 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
881 dir
|= NFS4_CDFC4_BACK
;
883 return nfsd4_new_conn(rqstp
, ses
, dir
);
886 /* must be called under client_lock */
887 static void nfsd4_del_conns(struct nfsd4_session
*s
)
889 struct nfs4_client
*clp
= s
->se_client
;
890 struct nfsd4_conn
*c
;
892 spin_lock(&clp
->cl_lock
);
893 while (!list_empty(&s
->se_conns
)) {
894 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
895 list_del_init(&c
->cn_persession
);
896 spin_unlock(&clp
->cl_lock
);
898 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
901 spin_lock(&clp
->cl_lock
);
903 spin_unlock(&clp
->cl_lock
);
906 static void free_session(struct kref
*kref
)
908 struct nfsd4_session
*ses
;
911 lockdep_assert_held(&client_lock
);
912 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
913 nfsd4_del_conns(ses
);
914 spin_lock(&nfsd_drc_lock
);
915 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
916 nfsd_drc_mem_used
-= mem
;
917 spin_unlock(&nfsd_drc_lock
);
918 free_session_slots(ses
);
922 void nfsd4_put_session(struct nfsd4_session
*ses
)
924 spin_lock(&client_lock
);
925 nfsd4_put_session_locked(ses
);
926 spin_unlock(&client_lock
);
929 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
931 struct nfsd4_session
*new;
932 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
933 int numslots
, slotsize
;
938 * Note decreasing slot size below client's request may
939 * make it difficult for client to function correctly, whereas
940 * decreasing the number of slots will (just?) affect
941 * performance. When short on memory we therefore prefer to
942 * decrease number of slots instead of their size.
944 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
945 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
949 new = alloc_session(slotsize
, numslots
);
951 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
954 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
956 new->se_client
= clp
;
959 INIT_LIST_HEAD(&new->se_conns
);
961 new->se_cb_seq_nr
= 1;
962 new->se_flags
= cses
->flags
;
963 new->se_cb_prog
= cses
->callback_prog
;
964 kref_init(&new->se_ref
);
965 idx
= hash_sessionid(&new->se_sessionid
);
966 spin_lock(&client_lock
);
967 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
968 spin_lock(&clp
->cl_lock
);
969 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
970 spin_unlock(&clp
->cl_lock
);
971 spin_unlock(&client_lock
);
973 status
= nfsd4_new_conn_from_crses(rqstp
, new);
974 /* whoops: benny points out, status is ignored! (err, or bogus) */
976 spin_lock(&client_lock
);
977 free_session(&new->se_ref
);
978 spin_unlock(&client_lock
);
981 if (cses
->flags
& SESSION4_BACK_CHAN
) {
982 struct sockaddr
*sa
= svc_addr(rqstp
);
984 * This is a little silly; with sessions there's no real
985 * use for the callback address. Use the peer address
986 * as a reasonable default for now, but consider fixing
987 * the rpc client not to require an address in the
990 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
991 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
993 nfsd4_probe_callback(clp
);
997 /* caller must hold client_lock */
998 static struct nfsd4_session
*
999 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
1001 struct nfsd4_session
*elem
;
1004 dump_sessionid(__func__
, sessionid
);
1005 idx
= hash_sessionid(sessionid
);
1006 /* Search in the appropriate list */
1007 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
1008 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1009 NFS4_MAX_SESSIONID_LEN
)) {
1014 dprintk("%s: session not found\n", __func__
);
1018 /* caller must hold client_lock */
1020 unhash_session(struct nfsd4_session
*ses
)
1022 list_del(&ses
->se_hash
);
1023 spin_lock(&ses
->se_client
->cl_lock
);
1024 list_del(&ses
->se_perclnt
);
1025 spin_unlock(&ses
->se_client
->cl_lock
);
1028 /* must be called under the client_lock */
1030 renew_client_locked(struct nfs4_client
*clp
)
1032 if (is_client_expired(clp
)) {
1034 printk("%s: client (clientid %08x/%08x) already expired\n",
1036 clp
->cl_clientid
.cl_boot
,
1037 clp
->cl_clientid
.cl_id
);
1041 dprintk("renewing client (clientid %08x/%08x)\n",
1042 clp
->cl_clientid
.cl_boot
,
1043 clp
->cl_clientid
.cl_id
);
1044 list_move_tail(&clp
->cl_lru
, &client_lru
);
1045 clp
->cl_time
= get_seconds();
1049 renew_client(struct nfs4_client
*clp
)
1051 spin_lock(&client_lock
);
1052 renew_client_locked(clp
);
1053 spin_unlock(&client_lock
);
1056 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1058 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1060 if (clid
->cl_boot
== nn
->boot_time
)
1062 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1063 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1068 * XXX Should we use a slab cache ?
1069 * This type of memory management is somewhat inefficient, but we use it
1070 * anyway since SETCLIENTID is not a common operation.
1072 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1074 struct nfs4_client
*clp
;
1076 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1079 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1080 if (clp
->cl_name
.data
== NULL
) {
1084 clp
->cl_name
.len
= name
.len
;
1089 free_client(struct nfs4_client
*clp
)
1091 lockdep_assert_held(&client_lock
);
1092 while (!list_empty(&clp
->cl_sessions
)) {
1093 struct nfsd4_session
*ses
;
1094 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1096 list_del(&ses
->se_perclnt
);
1097 nfsd4_put_session_locked(ses
);
1099 free_svc_cred(&clp
->cl_cred
);
1100 kfree(clp
->cl_name
.data
);
1105 release_session_client(struct nfsd4_session
*session
)
1107 struct nfs4_client
*clp
= session
->se_client
;
1109 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1111 if (is_client_expired(clp
)) {
1113 session
->se_client
= NULL
;
1115 renew_client_locked(clp
);
1116 spin_unlock(&client_lock
);
1119 /* must be called under the client_lock */
1121 unhash_client_locked(struct nfs4_client
*clp
)
1123 struct nfsd4_session
*ses
;
1125 mark_client_expired(clp
);
1126 list_del(&clp
->cl_lru
);
1127 spin_lock(&clp
->cl_lock
);
1128 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1129 list_del_init(&ses
->se_hash
);
1130 spin_unlock(&clp
->cl_lock
);
1134 expire_client(struct nfs4_client
*clp
)
1136 struct nfs4_openowner
*oo
;
1137 struct nfs4_delegation
*dp
;
1138 struct list_head reaplist
;
1140 INIT_LIST_HEAD(&reaplist
);
1141 spin_lock(&recall_lock
);
1142 while (!list_empty(&clp
->cl_delegations
)) {
1143 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1144 list_del_init(&dp
->dl_perclnt
);
1145 list_move(&dp
->dl_recall_lru
, &reaplist
);
1147 spin_unlock(&recall_lock
);
1148 while (!list_empty(&reaplist
)) {
1149 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1150 unhash_delegation(dp
);
1152 while (!list_empty(&clp
->cl_openowners
)) {
1153 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1154 release_openowner(oo
);
1156 nfsd4_shutdown_callback(clp
);
1157 if (clp
->cl_cb_conn
.cb_xprt
)
1158 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1159 list_del(&clp
->cl_idhash
);
1160 list_del(&clp
->cl_strhash
);
1161 spin_lock(&client_lock
);
1162 unhash_client_locked(clp
);
1163 if (atomic_read(&clp
->cl_refcount
) == 0)
1165 spin_unlock(&client_lock
);
1168 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1170 memcpy(target
->cl_verifier
.data
, source
->data
,
1171 sizeof(target
->cl_verifier
.data
));
1174 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1176 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1177 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1180 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1182 if (source
->cr_principal
) {
1183 target
->cr_principal
=
1184 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1185 if (target
->cr_principal
== NULL
)
1188 target
->cr_principal
= NULL
;
1189 target
->cr_flavor
= source
->cr_flavor
;
1190 target
->cr_uid
= source
->cr_uid
;
1191 target
->cr_gid
= source
->cr_gid
;
1192 target
->cr_group_info
= source
->cr_group_info
;
1193 get_group_info(target
->cr_group_info
);
1197 static int same_name(const char *n1
, const char *n2
)
1199 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1203 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1205 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1209 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1211 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1214 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1218 if (g1
->ngroups
!= g2
->ngroups
)
1220 for (i
=0; i
<g1
->ngroups
; i
++)
1221 if (GROUP_AT(g1
, i
) != GROUP_AT(g2
, i
))
1227 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1229 if ((cr1
->cr_flavor
!= cr2
->cr_flavor
)
1230 || (cr1
->cr_uid
!= cr2
->cr_uid
)
1231 || (cr1
->cr_gid
!= cr2
->cr_gid
)
1232 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1234 if (cr1
->cr_principal
== cr2
->cr_principal
)
1236 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1238 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1241 static void gen_clid(struct nfs4_client
*clp
)
1243 static u32 current_clientid
= 1;
1244 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
1246 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1247 clp
->cl_clientid
.cl_id
= current_clientid
++;
1250 static void gen_confirm(struct nfs4_client
*clp
)
1255 verf
[0] = (__be32
)get_seconds();
1256 verf
[1] = (__be32
)i
++;
1257 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1260 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1262 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1265 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1267 struct nfs4_stid
*s
;
1269 s
= find_stateid(cl
, t
);
1272 if (typemask
& s
->sc_type
)
1277 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1278 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1280 struct nfs4_client
*clp
;
1281 struct sockaddr
*sa
= svc_addr(rqstp
);
1284 clp
= alloc_client(name
);
1288 INIT_LIST_HEAD(&clp
->cl_sessions
);
1289 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1291 spin_lock(&client_lock
);
1293 spin_unlock(&client_lock
);
1296 idr_init(&clp
->cl_stateids
);
1297 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1298 atomic_set(&clp
->cl_refcount
, 0);
1299 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1300 INIT_LIST_HEAD(&clp
->cl_idhash
);
1301 INIT_LIST_HEAD(&clp
->cl_strhash
);
1302 INIT_LIST_HEAD(&clp
->cl_openowners
);
1303 INIT_LIST_HEAD(&clp
->cl_delegations
);
1304 INIT_LIST_HEAD(&clp
->cl_lru
);
1305 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1306 spin_lock_init(&clp
->cl_lock
);
1307 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1308 clp
->cl_time
= get_seconds();
1309 clear_bit(0, &clp
->cl_cb_slot_busy
);
1310 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1311 copy_verf(clp
, verf
);
1312 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1314 clp
->cl_cb_session
= NULL
;
1319 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1321 unsigned int idhashval
;
1323 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1324 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1325 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1330 move_to_confirmed(struct nfs4_client
*clp
)
1332 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1333 unsigned int strhashval
;
1335 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1336 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1337 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1338 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1342 static struct nfs4_client
*
1343 find_confirmed_client(clientid_t
*clid
)
1345 struct nfs4_client
*clp
;
1346 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1348 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1349 if (same_clid(&clp
->cl_clientid
, clid
)) {
1357 static struct nfs4_client
*
1358 find_unconfirmed_client(clientid_t
*clid
)
1360 struct nfs4_client
*clp
;
1361 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1363 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1364 if (same_clid(&clp
->cl_clientid
, clid
))
1370 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1372 return clp
->cl_exchange_flags
!= 0;
1375 static struct nfs4_client
*
1376 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1378 struct nfs4_client
*clp
;
1380 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1381 if (same_name(clp
->cl_recdir
, dname
))
1387 static struct nfs4_client
*
1388 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1390 struct nfs4_client
*clp
;
1392 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1393 if (same_name(clp
->cl_recdir
, dname
))
1400 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1402 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1403 struct sockaddr
*sa
= svc_addr(rqstp
);
1404 u32 scopeid
= rpc_get_scope_id(sa
);
1405 unsigned short expected_family
;
1407 /* Currently, we only support tcp and tcp6 for the callback channel */
1408 if (se
->se_callback_netid_len
== 3 &&
1409 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1410 expected_family
= AF_INET
;
1411 else if (se
->se_callback_netid_len
== 4 &&
1412 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1413 expected_family
= AF_INET6
;
1417 conn
->cb_addrlen
= rpc_uaddr2sockaddr(&init_net
, se
->se_callback_addr_val
,
1418 se
->se_callback_addr_len
,
1419 (struct sockaddr
*)&conn
->cb_addr
,
1420 sizeof(conn
->cb_addr
));
1422 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1425 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1426 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1428 conn
->cb_prog
= se
->se_callback_prog
;
1429 conn
->cb_ident
= se
->se_callback_ident
;
1430 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1433 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1434 conn
->cb_addrlen
= 0;
1435 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1436 "will not receive delegations\n",
1437 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1443 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1446 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1448 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1451 dprintk("--> %s slot %p\n", __func__
, slot
);
1453 slot
->sl_opcnt
= resp
->opcnt
;
1454 slot
->sl_status
= resp
->cstate
.status
;
1456 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1457 if (nfsd4_not_cached(resp
)) {
1458 slot
->sl_datalen
= 0;
1461 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1462 base
= (char *)resp
->cstate
.datap
-
1463 (char *)resp
->xbuf
->head
[0].iov_base
;
1464 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1466 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1471 * Encode the replay sequence operation from the slot values.
1472 * If cachethis is FALSE encode the uncached rep error on the next
1473 * operation which sets resp->p and increments resp->opcnt for
1474 * nfs4svc_encode_compoundres.
1478 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1479 struct nfsd4_compoundres
*resp
)
1481 struct nfsd4_op
*op
;
1482 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1484 /* Encode the replayed sequence operation */
1485 op
= &args
->ops
[resp
->opcnt
- 1];
1486 nfsd4_encode_operation(resp
, op
);
1488 /* Return nfserr_retry_uncached_rep in next operation. */
1489 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1490 op
= &args
->ops
[resp
->opcnt
++];
1491 op
->status
= nfserr_retry_uncached_rep
;
1492 nfsd4_encode_operation(resp
, op
);
1498 * The sequence operation is not cached because we can use the slot and
1502 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1503 struct nfsd4_sequence
*seq
)
1505 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1508 dprintk("--> %s slot %p\n", __func__
, slot
);
1510 /* Either returns 0 or nfserr_retry_uncached */
1511 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1512 if (status
== nfserr_retry_uncached_rep
)
1515 /* The sequence operation has been encoded, cstate->datap set. */
1516 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1518 resp
->opcnt
= slot
->sl_opcnt
;
1519 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1520 status
= slot
->sl_status
;
1526 * Set the exchange_id flags returned by the server.
1529 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1531 /* pNFS is not supported */
1532 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1534 /* Referrals are supported, Migration is not. */
1535 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1537 /* set the wire flags to return to client. */
1538 clid
->flags
= new->cl_exchange_flags
;
1541 static bool client_has_state(struct nfs4_client
*clp
)
1544 * Note clp->cl_openowners check isn't quite right: there's no
1545 * need to count owners without stateid's.
1547 * Also note we should probably be using this in 4.0 case too.
1549 return !list_empty(&clp
->cl_openowners
)
1550 || !list_empty(&clp
->cl_delegations
)
1551 || !list_empty(&clp
->cl_sessions
);
1555 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1556 struct nfsd4_compound_state
*cstate
,
1557 struct nfsd4_exchange_id
*exid
)
1559 struct nfs4_client
*unconf
, *conf
, *new;
1561 unsigned int strhashval
;
1562 char dname
[HEXDIR_LEN
];
1563 char addr_str
[INET6_ADDRSTRLEN
];
1564 nfs4_verifier verf
= exid
->verifier
;
1565 struct sockaddr
*sa
= svc_addr(rqstp
);
1566 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1568 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1569 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1570 "ip_addr=%s flags %x, spa_how %d\n",
1571 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1572 addr_str
, exid
->flags
, exid
->spa_how
);
1574 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1575 return nfserr_inval
;
1577 /* Currently only support SP4_NONE */
1578 switch (exid
->spa_how
) {
1582 return nfserr_serverfault
;
1584 BUG(); /* checked by xdr code */
1586 return nfserr_serverfault
; /* no excuse :-/ */
1589 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1594 strhashval
= clientstr_hashval(dname
);
1596 /* Cases below refer to rfc 5661 section 18.35.4: */
1598 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1600 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1601 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1604 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1605 status
= nfserr_inval
;
1608 if (!creds_match
) { /* case 9 */
1609 status
= nfserr_perm
;
1612 if (!verfs_match
) { /* case 8 */
1613 status
= nfserr_not_same
;
1617 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1621 if (!creds_match
) { /* case 3 */
1622 if (client_has_state(conf
)) {
1623 status
= nfserr_clid_inuse
;
1626 expire_client(conf
);
1629 if (verfs_match
) { /* case 2 */
1630 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1634 /* case 5, client reboot */
1638 if (update
) { /* case 7 */
1639 status
= nfserr_noent
;
1643 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1644 if (unconf
) /* case 4, possible retry or client restart */
1645 expire_client(unconf
);
1647 /* case 1 (normal case) */
1649 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1651 status
= nfserr_jukebox
;
1656 add_to_unconfirmed(new, strhashval
);
1658 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1659 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1661 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1662 nfsd4_set_ex_flags(new, exid
);
1664 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1665 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1669 nfs4_unlock_state();
1674 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1676 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1679 /* The slot is in use, and no response has been sent. */
1681 if (seqid
== slot_seqid
)
1682 return nfserr_jukebox
;
1684 return nfserr_seq_misordered
;
1686 /* Note unsigned 32-bit arithmetic handles wraparound: */
1687 if (likely(seqid
== slot_seqid
+ 1))
1689 if (seqid
== slot_seqid
)
1690 return nfserr_replay_cache
;
1691 return nfserr_seq_misordered
;
1695 * Cache the create session result into the create session single DRC
1696 * slot cache by saving the xdr structure. sl_seqid has been set.
1697 * Do this for solo or embedded create session operations.
1700 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1701 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1703 slot
->sl_status
= nfserr
;
1704 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1708 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1709 struct nfsd4_clid_slot
*slot
)
1711 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1712 return slot
->sl_status
;
1715 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1716 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1717 1 + /* MIN tag is length with zero, only length */ \
1718 3 + /* version, opcount, opcode */ \
1719 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1720 /* seqid, slotID, slotID, cache */ \
1721 4 ) * sizeof(__be32))
1723 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1724 2 + /* verifier: AUTH_NULL, length 0 */\
1726 1 + /* MIN tag is length with zero, only length */ \
1727 3 + /* opcount, opcode, opstatus*/ \
1728 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1729 /* seqid, slotID, slotID, slotID, status */ \
1730 5 ) * sizeof(__be32))
1732 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1734 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1735 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1739 nfsd4_create_session(struct svc_rqst
*rqstp
,
1740 struct nfsd4_compound_state
*cstate
,
1741 struct nfsd4_create_session
*cr_ses
)
1743 struct sockaddr
*sa
= svc_addr(rqstp
);
1744 struct nfs4_client
*conf
, *unconf
;
1745 struct nfsd4_session
*new;
1746 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1747 bool confirm_me
= false;
1750 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1751 return nfserr_inval
;
1754 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1755 conf
= find_confirmed_client(&cr_ses
->clientid
);
1758 cs_slot
= &conf
->cl_cs_slot
;
1759 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1760 if (status
== nfserr_replay_cache
) {
1761 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1763 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1764 status
= nfserr_seq_misordered
;
1767 } else if (unconf
) {
1768 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1769 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1770 status
= nfserr_clid_inuse
;
1773 cs_slot
= &unconf
->cl_cs_slot
;
1774 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1776 /* an unconfirmed replay returns misordered */
1777 status
= nfserr_seq_misordered
;
1783 status
= nfserr_stale_clientid
;
1788 * XXX: we should probably set this at creation time, and check
1789 * for consistent minorversion use throughout:
1791 conf
->cl_minorversion
= 1;
1793 * We do not support RDMA or persistent sessions
1795 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1796 cr_ses
->flags
&= ~SESSION4_RDMA
;
1798 status
= nfserr_toosmall
;
1799 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1802 status
= nfserr_jukebox
;
1803 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1807 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1808 NFS4_MAX_SESSIONID_LEN
);
1809 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1810 sizeof(struct nfsd4_channel_attrs
));
1811 cs_slot
->sl_seqid
++;
1812 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1814 /* cache solo and embedded create sessions under the state lock */
1815 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1817 unsigned int hash
= clientstr_hashval(unconf
->cl_recdir
);
1818 struct nfs4_client
*old
=
1819 find_confirmed_client_by_str(conf
->cl_recdir
, hash
);
1822 move_to_confirmed(conf
);
1825 nfs4_unlock_state();
1826 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1830 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1832 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1833 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1835 return argp
->opcnt
== resp
->opcnt
;
1838 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1841 case NFS4_CDFC4_FORE
:
1842 case NFS4_CDFC4_BACK
:
1844 case NFS4_CDFC4_FORE_OR_BOTH
:
1845 case NFS4_CDFC4_BACK_OR_BOTH
:
1846 *dir
= NFS4_CDFC4_BOTH
;
1849 return nfserr_inval
;
1852 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1853 struct nfsd4_compound_state
*cstate
,
1854 struct nfsd4_bind_conn_to_session
*bcts
)
1858 if (!nfsd4_last_compound_op(rqstp
))
1859 return nfserr_not_only_op
;
1860 spin_lock(&client_lock
);
1861 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1862 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1863 * client_lock iself: */
1864 if (cstate
->session
) {
1865 nfsd4_get_session(cstate
->session
);
1866 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1868 spin_unlock(&client_lock
);
1869 if (!cstate
->session
)
1870 return nfserr_badsession
;
1872 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1874 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1878 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1882 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1886 nfsd4_destroy_session(struct svc_rqst
*r
,
1887 struct nfsd4_compound_state
*cstate
,
1888 struct nfsd4_destroy_session
*sessionid
)
1890 struct nfsd4_session
*ses
;
1891 __be32 status
= nfserr_badsession
;
1894 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1895 * - Should we return nfserr_back_chan_busy if waiting for
1896 * callbacks on to-be-destroyed session?
1897 * - Do we need to clear any callback info from previous session?
1900 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1901 if (!nfsd4_last_compound_op(r
))
1902 return nfserr_not_only_op
;
1904 dump_sessionid(__func__
, &sessionid
->sessionid
);
1905 spin_lock(&client_lock
);
1906 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1908 spin_unlock(&client_lock
);
1912 unhash_session(ses
);
1913 spin_unlock(&client_lock
);
1916 nfsd4_probe_callback_sync(ses
->se_client
);
1917 nfs4_unlock_state();
1919 spin_lock(&client_lock
);
1920 nfsd4_del_conns(ses
);
1921 nfsd4_put_session_locked(ses
);
1922 spin_unlock(&client_lock
);
1925 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1929 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1931 struct nfsd4_conn
*c
;
1933 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1934 if (c
->cn_xprt
== xpt
) {
1941 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1943 struct nfs4_client
*clp
= ses
->se_client
;
1944 struct nfsd4_conn
*c
;
1947 spin_lock(&clp
->cl_lock
);
1948 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1950 spin_unlock(&clp
->cl_lock
);
1954 __nfsd4_hash_conn(new, ses
);
1955 spin_unlock(&clp
->cl_lock
);
1956 ret
= nfsd4_register_conn(new);
1958 /* oops; xprt is already down: */
1959 nfsd4_conn_lost(&new->cn_xpt_user
);
1963 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1965 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1967 return args
->opcnt
> session
->se_fchannel
.maxops
;
1970 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1971 struct nfsd4_session
*session
)
1973 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1975 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1979 nfsd4_sequence(struct svc_rqst
*rqstp
,
1980 struct nfsd4_compound_state
*cstate
,
1981 struct nfsd4_sequence
*seq
)
1983 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1984 struct nfsd4_session
*session
;
1985 struct nfsd4_slot
*slot
;
1986 struct nfsd4_conn
*conn
;
1989 if (resp
->opcnt
!= 1)
1990 return nfserr_sequence_pos
;
1993 * Will be either used or freed by nfsd4_sequence_check_conn
1996 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1998 return nfserr_jukebox
;
2000 spin_lock(&client_lock
);
2001 status
= nfserr_badsession
;
2002 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
2006 status
= nfserr_too_many_ops
;
2007 if (nfsd4_session_too_many_ops(rqstp
, session
))
2010 status
= nfserr_req_too_big
;
2011 if (nfsd4_request_too_big(rqstp
, session
))
2014 status
= nfserr_badslot
;
2015 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2018 slot
= session
->se_slots
[seq
->slotid
];
2019 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2021 /* We do not negotiate the number of slots yet, so set the
2022 * maxslots to the session maxreqs which is used to encode
2023 * sr_highest_slotid and the sr_target_slot id to maxslots */
2024 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2026 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2027 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2028 if (status
== nfserr_replay_cache
) {
2029 status
= nfserr_seq_misordered
;
2030 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2032 cstate
->slot
= slot
;
2033 cstate
->session
= session
;
2034 /* Return the cached reply status and set cstate->status
2035 * for nfsd4_proc_compound processing */
2036 status
= nfsd4_replay_cache_entry(resp
, seq
);
2037 cstate
->status
= nfserr_replay_cache
;
2043 nfsd4_sequence_check_conn(conn
, session
);
2046 /* Success! bump slot seqid */
2047 slot
->sl_seqid
= seq
->seqid
;
2048 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2050 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2052 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2054 cstate
->slot
= slot
;
2055 cstate
->session
= session
;
2058 /* Hold a session reference until done processing the compound. */
2059 if (cstate
->session
) {
2060 struct nfs4_client
*clp
= session
->se_client
;
2062 nfsd4_get_session(cstate
->session
);
2063 atomic_inc(&clp
->cl_refcount
);
2064 switch (clp
->cl_cb_state
) {
2066 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2068 case NFSD4_CB_FAULT
:
2069 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2072 seq
->status_flags
= 0;
2076 spin_unlock(&client_lock
);
2077 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2082 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2084 struct nfs4_client
*conf
, *unconf
, *clp
;
2088 unconf
= find_unconfirmed_client(&dc
->clientid
);
2089 conf
= find_confirmed_client(&dc
->clientid
);
2094 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2095 status
= nfserr_clientid_busy
;
2099 /* rfc5661 18.50.3 */
2100 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2101 status
= nfserr_clientid_busy
;
2107 status
= nfserr_stale_clientid
;
2113 nfs4_unlock_state();
2114 dprintk("%s return %d\n", __func__
, ntohl(status
));
2119 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2123 if (rc
->rca_one_fs
) {
2124 if (!cstate
->current_fh
.fh_dentry
)
2125 return nfserr_nofilehandle
;
2127 * We don't take advantage of the rca_one_fs case.
2128 * That's OK, it's optional, we can safely ignore it.
2134 status
= nfserr_complete_already
;
2135 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2136 &cstate
->session
->se_client
->cl_flags
))
2139 status
= nfserr_stale_clientid
;
2140 if (is_client_expired(cstate
->session
->se_client
))
2142 * The following error isn't really legal.
2143 * But we only get here if the client just explicitly
2144 * destroyed the client. Surely it no longer cares what
2145 * error it gets back on an operation for the dead
2151 nfsd4_client_record_create(cstate
->session
->se_client
);
2153 nfs4_unlock_state();
2158 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2159 struct nfsd4_setclientid
*setclid
)
2161 struct xdr_netobj clname
= setclid
->se_name
;
2162 nfs4_verifier clverifier
= setclid
->se_verf
;
2163 unsigned int strhashval
;
2164 struct nfs4_client
*conf
, *unconf
, *new;
2166 char dname
[HEXDIR_LEN
];
2168 status
= nfs4_make_rec_clidname(dname
, &clname
);
2172 strhashval
= clientstr_hashval(dname
);
2174 /* Cases below refer to rfc 3530 section 14.2.33: */
2176 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2179 status
= nfserr_clid_inuse
;
2180 if (clp_used_exchangeid(conf
))
2182 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2183 char addr_str
[INET6_ADDRSTRLEN
];
2184 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2186 dprintk("NFSD: setclientid: string in use by client "
2187 "at %s\n", addr_str
);
2191 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2193 expire_client(unconf
);
2194 status
= nfserr_jukebox
;
2195 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2198 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2199 /* case 1: probable callback update */
2200 copy_clid(new, conf
);
2201 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2204 * XXX: we should probably set this at creation time, and check
2205 * for consistent minorversion use throughout:
2207 new->cl_minorversion
= 0;
2208 gen_callback(new, setclid
, rqstp
);
2209 add_to_unconfirmed(new, strhashval
);
2210 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2211 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2212 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2215 nfs4_unlock_state();
2221 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2222 struct nfsd4_compound_state
*cstate
,
2223 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2225 struct nfs4_client
*conf
, *unconf
;
2226 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2227 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2229 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
2231 if (STALE_CLIENTID(clid
, nn
))
2232 return nfserr_stale_clientid
;
2235 conf
= find_confirmed_client(clid
);
2236 unconf
= find_unconfirmed_client(clid
);
2238 * We try hard to give out unique clientid's, so if we get an
2239 * attempt to confirm the same clientid with a different cred,
2240 * there's a bug somewhere. Let's charitably assume it's our
2243 status
= nfserr_serverfault
;
2244 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2246 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2248 /* cases below refer to rfc 3530 section 14.2.34: */
2249 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2250 if (conf
&& !unconf
) /* case 2: probable retransmit */
2252 else /* case 4: client hasn't noticed we rebooted yet? */
2253 status
= nfserr_stale_clientid
;
2257 if (conf
) { /* case 1: callback update */
2258 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2259 nfsd4_probe_callback(conf
);
2260 expire_client(unconf
);
2261 } else { /* case 3: normal case; new or rebooted client */
2262 unsigned int hash
= clientstr_hashval(unconf
->cl_recdir
);
2264 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
, hash
);
2266 nfsd4_client_record_remove(conf
);
2267 expire_client(conf
);
2269 move_to_confirmed(unconf
);
2270 nfsd4_probe_callback(unconf
);
2273 nfs4_unlock_state();
2277 static struct nfs4_file
*nfsd4_alloc_file(void)
2279 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2282 /* OPEN Share state helper functions */
2283 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2285 unsigned int hashval
= file_hashval(ino
);
2287 atomic_set(&fp
->fi_ref
, 1);
2288 INIT_LIST_HEAD(&fp
->fi_hash
);
2289 INIT_LIST_HEAD(&fp
->fi_stateids
);
2290 INIT_LIST_HEAD(&fp
->fi_delegations
);
2291 fp
->fi_inode
= igrab(ino
);
2292 fp
->fi_had_conflict
= false;
2293 fp
->fi_lease
= NULL
;
2294 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2295 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2296 spin_lock(&recall_lock
);
2297 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2298 spin_unlock(&recall_lock
);
2302 nfsd4_free_slab(struct kmem_cache
**slab
)
2306 kmem_cache_destroy(*slab
);
2311 nfsd4_free_slabs(void)
2313 nfsd4_free_slab(&openowner_slab
);
2314 nfsd4_free_slab(&lockowner_slab
);
2315 nfsd4_free_slab(&file_slab
);
2316 nfsd4_free_slab(&stateid_slab
);
2317 nfsd4_free_slab(&deleg_slab
);
2321 nfsd4_init_slabs(void)
2323 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2324 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2325 if (openowner_slab
== NULL
)
2327 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2328 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2329 if (lockowner_slab
== NULL
)
2331 file_slab
= kmem_cache_create("nfsd4_files",
2332 sizeof(struct nfs4_file
), 0, 0, NULL
);
2333 if (file_slab
== NULL
)
2335 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2336 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2337 if (stateid_slab
== NULL
)
2339 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2340 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2341 if (deleg_slab
== NULL
)
2346 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2350 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2352 kfree(oo
->oo_owner
.so_owner
.data
);
2353 kmem_cache_free(openowner_slab
, oo
);
2356 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2358 kfree(lo
->lo_owner
.so_owner
.data
);
2359 kmem_cache_free(lockowner_slab
, lo
);
2362 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2364 rp
->rp_status
= nfserr_serverfault
;
2366 rp
->rp_buf
= rp
->rp_ibuf
;
2369 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2371 struct nfs4_stateowner
*sop
;
2373 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2377 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2378 if (!sop
->so_owner
.data
) {
2379 kmem_cache_free(slab
, sop
);
2382 sop
->so_owner
.len
= owner
->len
;
2384 INIT_LIST_HEAD(&sop
->so_stateids
);
2385 sop
->so_client
= clp
;
2386 init_nfs4_replay(&sop
->so_replay
);
2390 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2392 list_add(&oo
->oo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2393 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2396 static struct nfs4_openowner
*
2397 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2398 struct nfs4_openowner
*oo
;
2400 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2403 oo
->oo_owner
.so_is_open_owner
= 1;
2404 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2405 oo
->oo_flags
= NFS4_OO_NEW
;
2407 oo
->oo_last_closed_stid
= NULL
;
2408 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2409 hash_openowner(oo
, clp
, strhashval
);
2413 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2414 struct nfs4_openowner
*oo
= open
->op_openowner
;
2415 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2417 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2418 INIT_LIST_HEAD(&stp
->st_lockowners
);
2419 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2420 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2421 stp
->st_stateowner
= &oo
->oo_owner
;
2424 stp
->st_access_bmap
= 0;
2425 stp
->st_deny_bmap
= 0;
2426 set_access(open
->op_share_access
, stp
);
2427 set_deny(open
->op_share_deny
, stp
);
2428 stp
->st_openstp
= NULL
;
2432 move_to_close_lru(struct nfs4_openowner
*oo
)
2434 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2436 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2437 oo
->oo_time
= get_seconds();
2441 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2444 return (sop
->so_owner
.len
== owner
->len
) &&
2445 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2446 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2449 static struct nfs4_openowner
*
2450 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2452 struct nfs4_stateowner
*so
;
2453 struct nfs4_openowner
*oo
;
2455 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2456 if (!so
->so_is_open_owner
)
2458 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2460 renew_client(oo
->oo_owner
.so_client
);
2467 /* search file_hashtbl[] for file */
2468 static struct nfs4_file
*
2469 find_file(struct inode
*ino
)
2471 unsigned int hashval
= file_hashval(ino
);
2472 struct nfs4_file
*fp
;
2474 spin_lock(&recall_lock
);
2475 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2476 if (fp
->fi_inode
== ino
) {
2478 spin_unlock(&recall_lock
);
2482 spin_unlock(&recall_lock
);
2487 * Called to check deny when READ with all zero stateid or
2488 * WRITE with all zero or all one stateid
2491 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2493 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2494 struct nfs4_file
*fp
;
2495 struct nfs4_ol_stateid
*stp
;
2498 dprintk("NFSD: nfs4_share_conflict\n");
2500 fp
= find_file(ino
);
2503 ret
= nfserr_locked
;
2504 /* Search for conflicting share reservations */
2505 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2506 if (test_deny(deny_type
, stp
) ||
2507 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2516 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2518 /* We're assuming the state code never drops its reference
2519 * without first removing the lease. Since we're in this lease
2520 * callback (and since the lease code is serialized by the kernel
2521 * lock) we know the server hasn't removed the lease yet, we know
2522 * it's safe to take a reference: */
2523 atomic_inc(&dp
->dl_count
);
2525 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2527 /* only place dl_time is set. protected by lock_flocks*/
2528 dp
->dl_time
= get_seconds();
2530 nfsd4_cb_recall(dp
);
2533 /* Called from break_lease() with lock_flocks() held. */
2534 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2536 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2537 struct nfs4_delegation
*dp
;
2540 /* We assume break_lease is only called once per lease: */
2541 BUG_ON(fp
->fi_had_conflict
);
2543 * We don't want the locks code to timeout the lease for us;
2544 * we'll remove it ourself if a delegation isn't returned
2547 fl
->fl_break_time
= 0;
2549 spin_lock(&recall_lock
);
2550 fp
->fi_had_conflict
= true;
2551 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2552 nfsd_break_one_deleg(dp
);
2553 spin_unlock(&recall_lock
);
2557 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2560 return lease_modify(onlist
, arg
);
2565 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2566 .lm_break
= nfsd_break_deleg_cb
,
2567 .lm_change
= nfsd_change_deleg_cb
,
2570 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2572 if (nfsd4_has_session(cstate
))
2574 if (seqid
== so
->so_seqid
- 1)
2575 return nfserr_replay_me
;
2576 if (seqid
== so
->so_seqid
)
2578 return nfserr_bad_seqid
;
2582 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2583 struct nfsd4_open
*open
)
2585 clientid_t
*clientid
= &open
->op_clientid
;
2586 struct nfs4_client
*clp
= NULL
;
2587 unsigned int strhashval
;
2588 struct nfs4_openowner
*oo
= NULL
;
2590 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
2592 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2593 return nfserr_stale_clientid
;
2595 * In case we need it later, after we've already created the
2596 * file and don't want to risk a further failure:
2598 open
->op_file
= nfsd4_alloc_file();
2599 if (open
->op_file
== NULL
)
2600 return nfserr_jukebox
;
2602 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2603 oo
= find_openstateowner_str(strhashval
, open
);
2604 open
->op_openowner
= oo
;
2606 clp
= find_confirmed_client(clientid
);
2608 return nfserr_expired
;
2611 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2612 /* Replace unconfirmed owners without checking for replay. */
2613 clp
= oo
->oo_owner
.so_client
;
2614 release_openowner(oo
);
2615 open
->op_openowner
= NULL
;
2618 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2621 clp
= oo
->oo_owner
.so_client
;
2624 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2626 return nfserr_jukebox
;
2627 open
->op_openowner
= oo
;
2629 open
->op_stp
= nfs4_alloc_stateid(clp
);
2631 return nfserr_jukebox
;
2635 static inline __be32
2636 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2638 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2639 return nfserr_openmode
;
2644 static int share_access_to_flags(u32 share_access
)
2646 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2649 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2651 struct nfs4_stid
*ret
;
2653 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2656 return delegstateid(ret
);
2659 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2661 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2662 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2666 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2667 struct nfs4_delegation
**dp
)
2670 __be32 status
= nfserr_bad_stateid
;
2672 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2675 flags
= share_access_to_flags(open
->op_share_access
);
2676 status
= nfs4_check_delegmode(*dp
, flags
);
2680 if (!nfsd4_is_deleg_cur(open
))
2684 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2689 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2691 struct nfs4_ol_stateid
*local
;
2692 struct nfs4_openowner
*oo
= open
->op_openowner
;
2694 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2695 /* ignore lock owners */
2696 if (local
->st_stateowner
->so_is_open_owner
== 0)
2698 /* remember if we have seen this open owner */
2699 if (local
->st_stateowner
== &oo
->oo_owner
)
2701 /* check for conflicting share reservations */
2702 if (!test_share(local
, open
))
2703 return nfserr_share_denied
;
2708 static void nfs4_free_stateid(struct nfs4_ol_stateid
*s
)
2710 kmem_cache_free(stateid_slab
, s
);
2713 static inline int nfs4_access_to_access(u32 nfs4_access
)
2717 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2718 flags
|= NFSD_MAY_READ
;
2719 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2720 flags
|= NFSD_MAY_WRITE
;
2724 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2725 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2728 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2729 int access
= nfs4_access_to_access(open
->op_share_access
);
2731 if (!fp
->fi_fds
[oflag
]) {
2732 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2733 &fp
->fi_fds
[oflag
]);
2737 nfs4_file_get_access(fp
, oflag
);
2742 static inline __be32
2743 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2744 struct nfsd4_open
*open
)
2746 struct iattr iattr
= {
2747 .ia_valid
= ATTR_SIZE
,
2750 if (!open
->op_truncate
)
2752 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2753 return nfserr_inval
;
2754 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2758 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
2760 u32 op_share_access
= open
->op_share_access
;
2764 new_access
= !test_access(op_share_access
, stp
);
2766 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2770 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2773 int oflag
= nfs4_access_to_omode(op_share_access
);
2774 nfs4_file_put_access(fp
, oflag
);
2778 /* remember the open */
2779 set_access(op_share_access
, stp
);
2780 set_deny(open
->op_share_deny
, stp
);
2787 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2789 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2792 /* Should we give out recallable state?: */
2793 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2795 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2798 * In the sessions case, since we don't have to establish a
2799 * separate connection for callbacks, we assume it's OK
2800 * until we hear otherwise:
2802 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2805 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2807 struct file_lock
*fl
;
2809 fl
= locks_alloc_lock();
2812 locks_init_lock(fl
);
2813 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2814 fl
->fl_flags
= FL_LEASE
;
2815 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2816 fl
->fl_end
= OFFSET_MAX
;
2817 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2818 fl
->fl_pid
= current
->tgid
;
2822 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2824 struct nfs4_file
*fp
= dp
->dl_file
;
2825 struct file_lock
*fl
;
2828 fl
= nfs4_alloc_init_lease(dp
, flag
);
2831 fl
->fl_file
= find_readable_file(fp
);
2832 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2833 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2835 list_del_init(&dp
->dl_perclnt
);
2836 locks_free_lock(fl
);
2840 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2841 atomic_set(&fp
->fi_delegees
, 1);
2842 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2846 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2848 struct nfs4_file
*fp
= dp
->dl_file
;
2851 return nfs4_setlease(dp
, flag
);
2852 spin_lock(&recall_lock
);
2853 if (fp
->fi_had_conflict
) {
2854 spin_unlock(&recall_lock
);
2857 atomic_inc(&fp
->fi_delegees
);
2858 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2859 spin_unlock(&recall_lock
);
2860 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2864 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2866 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2867 if (status
== -EAGAIN
)
2868 open
->op_why_no_deleg
= WND4_CONTENTION
;
2870 open
->op_why_no_deleg
= WND4_RESOURCE
;
2871 switch (open
->op_deleg_want
) {
2872 case NFS4_SHARE_WANT_READ_DELEG
:
2873 case NFS4_SHARE_WANT_WRITE_DELEG
:
2874 case NFS4_SHARE_WANT_ANY_DELEG
:
2876 case NFS4_SHARE_WANT_CANCEL
:
2877 open
->op_why_no_deleg
= WND4_CANCELLED
;
2879 case NFS4_SHARE_WANT_NO_DELEG
:
2880 BUG(); /* not supposed to get here */
2886 * Attempt to hand out a delegation.
2889 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2890 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2892 struct nfs4_delegation
*dp
;
2893 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2895 int status
= 0, flag
= 0;
2897 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2898 flag
= NFS4_OPEN_DELEGATE_NONE
;
2899 open
->op_recall
= 0;
2900 switch (open
->op_claim_type
) {
2901 case NFS4_OPEN_CLAIM_PREVIOUS
:
2903 open
->op_recall
= 1;
2904 flag
= open
->op_delegate_type
;
2905 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2908 case NFS4_OPEN_CLAIM_NULL
:
2909 /* Let's not give out any delegations till everyone's
2910 * had the chance to reclaim theirs.... */
2911 if (locks_in_grace(net
))
2913 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2915 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2916 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2918 flag
= NFS4_OPEN_DELEGATE_READ
;
2924 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2927 status
= nfs4_set_delegation(dp
, flag
);
2931 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2933 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2934 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2936 open
->op_delegate_type
= flag
;
2937 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2938 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2939 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2940 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2942 /* 4.1 client asking for a delegation? */
2943 if (open
->op_deleg_want
)
2944 nfsd4_open_deleg_none_ext(open
, status
);
2948 nfs4_put_delegation(dp
);
2950 flag
= NFS4_OPEN_DELEGATE_NONE
;
2954 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2955 struct nfs4_delegation
*dp
)
2957 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
2958 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2959 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2960 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
2961 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
2962 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2963 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2964 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
2966 /* Otherwise the client must be confused wanting a delegation
2967 * it already has, therefore we don't return
2968 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
2973 * called with nfs4_lock_state() held.
2976 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2978 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2979 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
2980 struct nfs4_file
*fp
= NULL
;
2981 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2982 struct nfs4_ol_stateid
*stp
= NULL
;
2983 struct nfs4_delegation
*dp
= NULL
;
2987 * Lookup file; if found, lookup stateid and check open request,
2988 * and check for delegations in the process of being recalled.
2989 * If not found, create the nfs4_file struct
2991 fp
= find_file(ino
);
2993 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2995 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
2999 status
= nfserr_bad_stateid
;
3000 if (nfsd4_is_deleg_cur(open
))
3002 status
= nfserr_jukebox
;
3004 open
->op_file
= NULL
;
3005 nfsd4_init_file(fp
, ino
);
3009 * OPEN the file, or upgrade an existing OPEN.
3010 * If truncate fails, the OPEN fails.
3013 /* Stateid was found, this is an OPEN upgrade */
3014 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3018 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3021 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3025 open
->op_stp
= NULL
;
3026 init_open_stateid(stp
, fp
, open
);
3028 update_stateid(&stp
->st_stid
.sc_stateid
);
3029 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3031 if (nfsd4_has_session(&resp
->cstate
)) {
3032 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3034 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3035 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3036 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3042 * Attempt to hand out a delegation. No error return, because the
3043 * OPEN succeeds even if we fail.
3045 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3049 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3050 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3052 /* 4.1 client trying to upgrade/downgrade delegation? */
3053 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3054 open
->op_deleg_want
)
3055 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3059 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3060 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3062 * To finish the open response, we just need to set the rflags.
3064 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3065 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3066 !nfsd4_has_session(&resp
->cstate
))
3067 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3072 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3074 if (open
->op_openowner
) {
3075 struct nfs4_openowner
*oo
= open
->op_openowner
;
3077 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3078 list_del_init(&oo
->oo_close_lru
);
3079 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3081 release_openowner(oo
);
3082 open
->op_openowner
= NULL
;
3084 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3088 nfsd4_free_file(open
->op_file
);
3090 nfs4_free_stateid(open
->op_stp
);
3094 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3097 struct nfs4_client
*clp
;
3099 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
3102 dprintk("process_renew(%08x/%08x): starting\n",
3103 clid
->cl_boot
, clid
->cl_id
);
3104 status
= nfserr_stale_clientid
;
3105 if (STALE_CLIENTID(clid
, nn
))
3107 clp
= find_confirmed_client(clid
);
3108 status
= nfserr_expired
;
3110 /* We assume the client took too long to RENEW. */
3111 dprintk("nfsd4_renew: clientid not found!\n");
3114 status
= nfserr_cb_path_down
;
3115 if (!list_empty(&clp
->cl_delegations
)
3116 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3120 nfs4_unlock_state();
3125 nfsd4_end_grace(struct net
*net
)
3127 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3129 /* do nothing if grace period already ended */
3130 if (nn
->grace_ended
)
3133 dprintk("NFSD: end of grace period\n");
3134 nn
->grace_ended
= true;
3135 nfsd4_record_grace_done(net
, nn
->boot_time
);
3136 locks_end_grace(&nn
->nfsd4_manager
);
3138 * Now that every NFSv4 client has had the chance to recover and
3139 * to see the (possibly new, possibly shorter) lease time, we
3140 * can safely set the next grace time to the current lease time:
3142 nfsd4_grace
= nfsd4_lease
;
3146 nfs4_laundromat(void)
3148 struct nfs4_client
*clp
;
3149 struct nfs4_openowner
*oo
;
3150 struct nfs4_delegation
*dp
;
3151 struct list_head
*pos
, *next
, reaplist
;
3152 time_t cutoff
= get_seconds() - nfsd4_lease
;
3153 time_t t
, clientid_val
= nfsd4_lease
;
3154 time_t u
, test_val
= nfsd4_lease
;
3158 dprintk("NFSD: laundromat service - starting\n");
3159 nfsd4_end_grace(&init_net
);
3160 INIT_LIST_HEAD(&reaplist
);
3161 spin_lock(&client_lock
);
3162 list_for_each_safe(pos
, next
, &client_lru
) {
3163 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3164 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3165 t
= clp
->cl_time
- cutoff
;
3166 if (clientid_val
> t
)
3170 if (atomic_read(&clp
->cl_refcount
)) {
3171 dprintk("NFSD: client in use (clientid %08x)\n",
3172 clp
->cl_clientid
.cl_id
);
3175 unhash_client_locked(clp
);
3176 list_add(&clp
->cl_lru
, &reaplist
);
3178 spin_unlock(&client_lock
);
3179 list_for_each_safe(pos
, next
, &reaplist
) {
3180 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3181 dprintk("NFSD: purging unused client (clientid %08x)\n",
3182 clp
->cl_clientid
.cl_id
);
3183 nfsd4_client_record_remove(clp
);
3186 spin_lock(&recall_lock
);
3187 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3188 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3189 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3190 u
= dp
->dl_time
- cutoff
;
3195 list_move(&dp
->dl_recall_lru
, &reaplist
);
3197 spin_unlock(&recall_lock
);
3198 list_for_each_safe(pos
, next
, &reaplist
) {
3199 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3200 unhash_delegation(dp
);
3202 test_val
= nfsd4_lease
;
3203 list_for_each_safe(pos
, next
, &close_lru
) {
3204 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3205 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3206 u
= oo
->oo_time
- cutoff
;
3211 release_openowner(oo
);
3213 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3214 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3215 nfs4_unlock_state();
3216 return clientid_val
;
3219 static struct workqueue_struct
*laundry_wq
;
3220 static void laundromat_main(struct work_struct
*);
3221 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3224 laundromat_main(struct work_struct
*not_used
)
3228 t
= nfs4_laundromat();
3229 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3230 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3233 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3235 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3236 return nfserr_bad_stateid
;
3241 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3243 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3245 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3246 STATEID_VAL(stateid
));
3251 access_permit_read(struct nfs4_ol_stateid
*stp
)
3253 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3254 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3255 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3259 access_permit_write(struct nfs4_ol_stateid
*stp
)
3261 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3262 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3266 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3268 __be32 status
= nfserr_openmode
;
3270 /* For lock stateid's, we test the parent open, not the lock: */
3271 if (stp
->st_openstp
)
3272 stp
= stp
->st_openstp
;
3273 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3275 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3282 static inline __be32
3283 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3285 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3287 else if (locks_in_grace(net
)) {
3288 /* Answer in remaining cases depends on existence of
3289 * conflicting state; so we must wait out the grace period. */
3290 return nfserr_grace
;
3291 } else if (flags
& WR_STATE
)
3292 return nfs4_share_conflict(current_fh
,
3293 NFS4_SHARE_DENY_WRITE
);
3294 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3295 return nfs4_share_conflict(current_fh
,
3296 NFS4_SHARE_DENY_READ
);
3300 * Allow READ/WRITE during grace period on recovered state only for files
3301 * that are not able to provide mandatory locking.
3304 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3306 return locks_in_grace(net
) && mandatory_lock(inode
);
3309 /* Returns true iff a is later than b: */
3310 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3312 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3315 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3318 * When sessions are used the stateid generation number is ignored
3321 if (has_session
&& in
->si_generation
== 0)
3324 if (in
->si_generation
== ref
->si_generation
)
3327 /* If the client sends us a stateid from the future, it's buggy: */
3328 if (stateid_generation_after(in
, ref
))
3329 return nfserr_bad_stateid
;
3331 * However, we could see a stateid from the past, even from a
3332 * non-buggy client. For example, if the client sends a lock
3333 * while some IO is outstanding, the lock may bump si_generation
3334 * while the IO is still in flight. The client could avoid that
3335 * situation by waiting for responses on all the IO requests,
3336 * but better performance may result in retrying IO that
3337 * receives an old_stateid error if requests are rarely
3338 * reordered in flight:
3340 return nfserr_old_stateid
;
3343 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3345 struct nfs4_stid
*s
;
3346 struct nfs4_ol_stateid
*ols
;
3349 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3350 return nfserr_bad_stateid
;
3351 /* Client debugging aid. */
3352 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3353 char addr_str
[INET6_ADDRSTRLEN
];
3354 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3356 pr_warn_ratelimited("NFSD: client %s testing state ID "
3357 "with incorrect client ID\n", addr_str
);
3358 return nfserr_bad_stateid
;
3360 s
= find_stateid(cl
, stateid
);
3362 return nfserr_bad_stateid
;
3363 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3366 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3368 ols
= openlockstateid(s
);
3369 if (ols
->st_stateowner
->so_is_open_owner
3370 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3371 return nfserr_bad_stateid
;
3375 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
)
3377 struct nfs4_client
*cl
;
3378 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
3380 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3381 return nfserr_bad_stateid
;
3382 if (STALE_STATEID(stateid
, nn
))
3383 return nfserr_stale_stateid
;
3384 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
);
3386 return nfserr_expired
;
3387 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3389 return nfserr_bad_stateid
;
3395 * Checks for stateid operations
3398 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3399 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3401 struct nfs4_stid
*s
;
3402 struct nfs4_ol_stateid
*stp
= NULL
;
3403 struct nfs4_delegation
*dp
= NULL
;
3404 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3405 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3411 if (grace_disallows_io(net
, ino
))
3412 return nfserr_grace
;
3414 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3415 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3417 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
);
3420 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3423 switch (s
->sc_type
) {
3424 case NFS4_DELEG_STID
:
3425 dp
= delegstateid(s
);
3426 status
= nfs4_check_delegmode(dp
, flags
);
3430 *filpp
= dp
->dl_file
->fi_deleg_file
;
3434 case NFS4_OPEN_STID
:
3435 case NFS4_LOCK_STID
:
3436 stp
= openlockstateid(s
);
3437 status
= nfs4_check_fh(current_fh
, stp
);
3440 if (stp
->st_stateowner
->so_is_open_owner
3441 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3443 status
= nfs4_check_openmode(stp
, flags
);
3447 if (flags
& RD_STATE
)
3448 *filpp
= find_readable_file(stp
->st_file
);
3450 *filpp
= find_writeable_file(stp
->st_file
);
3454 return nfserr_bad_stateid
;
3462 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3464 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3465 return nfserr_locks_held
;
3466 release_lock_stateid(stp
);
3471 * Test if the stateid is valid
3474 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3475 struct nfsd4_test_stateid
*test_stateid
)
3477 struct nfsd4_test_stateid_id
*stateid
;
3478 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3481 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3482 stateid
->ts_id_status
=
3483 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3484 nfs4_unlock_state();
3490 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3491 struct nfsd4_free_stateid
*free_stateid
)
3493 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3494 struct nfs4_stid
*s
;
3495 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3496 __be32 ret
= nfserr_bad_stateid
;
3499 s
= find_stateid(cl
, stateid
);
3502 switch (s
->sc_type
) {
3503 case NFS4_DELEG_STID
:
3504 ret
= nfserr_locks_held
;
3506 case NFS4_OPEN_STID
:
3507 case NFS4_LOCK_STID
:
3508 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3511 if (s
->sc_type
== NFS4_LOCK_STID
)
3512 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3514 ret
= nfserr_locks_held
;
3517 ret
= nfserr_bad_stateid
;
3520 nfs4_unlock_state();
3527 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3528 RD_STATE
: WR_STATE
;
3531 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3533 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3534 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3537 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3540 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3542 * "Closed" stateid's exist *only* to return
3543 * nfserr_replay_me from the previous step.
3545 return nfserr_bad_stateid
;
3546 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3549 return nfs4_check_fh(current_fh
, stp
);
3553 * Checks for sequence id mutating operations.
3556 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3557 stateid_t
*stateid
, char typemask
,
3558 struct nfs4_ol_stateid
**stpp
)
3561 struct nfs4_stid
*s
;
3563 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3564 seqid
, STATEID_VAL(stateid
));
3567 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
);
3570 *stpp
= openlockstateid(s
);
3571 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3573 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3576 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3579 struct nfs4_openowner
*oo
;
3581 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3582 NFS4_OPEN_STID
, stpp
);
3585 oo
= openowner((*stpp
)->st_stateowner
);
3586 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3587 return nfserr_bad_stateid
;
3592 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3593 struct nfsd4_open_confirm
*oc
)
3596 struct nfs4_openowner
*oo
;
3597 struct nfs4_ol_stateid
*stp
;
3599 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3600 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3601 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3603 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3609 status
= nfs4_preprocess_seqid_op(cstate
,
3610 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3611 NFS4_OPEN_STID
, &stp
);
3614 oo
= openowner(stp
->st_stateowner
);
3615 status
= nfserr_bad_stateid
;
3616 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3618 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3619 update_stateid(&stp
->st_stid
.sc_stateid
);
3620 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3621 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3622 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3624 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3627 if (!cstate
->replay_owner
)
3628 nfs4_unlock_state();
3632 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3634 if (!test_access(access
, stp
))
3636 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3637 clear_access(access
, stp
);
3640 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3642 switch (to_access
) {
3643 case NFS4_SHARE_ACCESS_READ
:
3644 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3645 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3647 case NFS4_SHARE_ACCESS_WRITE
:
3648 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3649 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3651 case NFS4_SHARE_ACCESS_BOTH
:
3659 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3662 for (i
= 0; i
< 4; i
++) {
3663 if ((i
& deny
) != i
)
3669 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3670 struct nfsd4_compound_state
*cstate
,
3671 struct nfsd4_open_downgrade
*od
)
3674 struct nfs4_ol_stateid
*stp
;
3676 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3677 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3678 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3680 /* We don't yet support WANT bits: */
3681 if (od
->od_deleg_want
)
3682 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3686 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3687 &od
->od_stateid
, &stp
);
3690 status
= nfserr_inval
;
3691 if (!test_access(od
->od_share_access
, stp
)) {
3692 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3693 stp
->st_access_bmap
, od
->od_share_access
);
3696 if (!test_deny(od
->od_share_deny
, stp
)) {
3697 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3698 stp
->st_deny_bmap
, od
->od_share_deny
);
3701 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3703 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3705 update_stateid(&stp
->st_stid
.sc_stateid
);
3706 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3709 if (!cstate
->replay_owner
)
3710 nfs4_unlock_state();
3714 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3716 struct nfs4_openowner
*oo
;
3717 struct nfs4_ol_stateid
*s
;
3719 if (!so
->so_is_open_owner
)
3722 s
= oo
->oo_last_closed_stid
;
3725 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3726 /* Release the last_closed_stid on the next seqid bump: */
3727 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3730 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3731 release_last_closed_stateid(oo
);
3734 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3736 unhash_open_stateid(s
);
3737 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3741 * nfs4_unlock_state() called after encode
3744 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3745 struct nfsd4_close
*close
)
3748 struct nfs4_openowner
*oo
;
3749 struct nfs4_ol_stateid
*stp
;
3751 dprintk("NFSD: nfsd4_close on file %.*s\n",
3752 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3753 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3756 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3758 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3762 oo
= openowner(stp
->st_stateowner
);
3764 update_stateid(&stp
->st_stid
.sc_stateid
);
3765 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3767 nfsd4_close_open_stateid(stp
);
3768 oo
->oo_last_closed_stid
= stp
;
3770 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3771 if (cstate
->minorversion
) {
3772 release_openowner(oo
);
3773 cstate
->replay_owner
= NULL
;
3776 * In the 4.0 case we need to keep the owners around a
3777 * little while to handle CLOSE replay.
3779 if (list_empty(&oo
->oo_owner
.so_stateids
))
3780 move_to_close_lru(oo
);
3784 if (!cstate
->replay_owner
)
3785 nfs4_unlock_state();
3790 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3791 struct nfsd4_delegreturn
*dr
)
3793 struct nfs4_delegation
*dp
;
3794 stateid_t
*stateid
= &dr
->dr_stateid
;
3795 struct nfs4_stid
*s
;
3796 struct inode
*inode
;
3799 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3801 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3804 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
);
3807 dp
= delegstateid(s
);
3808 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3812 unhash_delegation(dp
);
3814 nfs4_unlock_state();
3820 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3822 #define LOCKOWNER_INO_HASH_BITS 8
3823 #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
3824 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3827 end_offset(u64 start
, u64 len
)
3832 return end
>= start
? end
: NFS4_MAX_UINT64
;
3835 /* last octet in a range */
3837 last_byte_offset(u64 start
, u64 len
)
3843 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3846 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3848 return (file_hashval(inode
) + cl_id
3849 + opaque_hashval(ownername
->data
, ownername
->len
))
3850 & LOCKOWNER_INO_HASH_MASK
;
3853 static struct list_head lockowner_ino_hashtbl
[LOCKOWNER_INO_HASH_SIZE
];
3856 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3857 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3858 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3859 * locking, this prevents us from being completely protocol-compliant. The
3860 * real solution to this problem is to start using unsigned file offsets in
3861 * the VFS, but this is a very deep change!
3864 nfs4_transform_lock_offset(struct file_lock
*lock
)
3866 if (lock
->fl_start
< 0)
3867 lock
->fl_start
= OFFSET_MAX
;
3868 if (lock
->fl_end
< 0)
3869 lock
->fl_end
= OFFSET_MAX
;
3872 /* Hack!: For now, we're defining this just so we can use a pointer to it
3873 * as a unique cookie to identify our (NFSv4's) posix locks. */
3874 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3878 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3880 struct nfs4_lockowner
*lo
;
3882 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3883 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3884 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3885 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3886 if (!deny
->ld_owner
.data
)
3887 /* We just don't care that much */
3889 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3890 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3893 deny
->ld_owner
.len
= 0;
3894 deny
->ld_owner
.data
= NULL
;
3895 deny
->ld_clientid
.cl_boot
= 0;
3896 deny
->ld_clientid
.cl_id
= 0;
3898 deny
->ld_start
= fl
->fl_start
;
3899 deny
->ld_length
= NFS4_MAX_UINT64
;
3900 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3901 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3902 deny
->ld_type
= NFS4_READ_LT
;
3903 if (fl
->fl_type
!= F_RDLCK
)
3904 deny
->ld_type
= NFS4_WRITE_LT
;
3907 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3909 struct nfs4_ol_stateid
*lst
;
3911 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3913 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3914 struct nfs4_ol_stateid
, st_perstateowner
);
3915 return lst
->st_file
->fi_inode
== inode
;
3918 static struct nfs4_lockowner
*
3919 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3920 struct xdr_netobj
*owner
)
3922 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3923 struct nfs4_lockowner
*lo
;
3925 list_for_each_entry(lo
, &lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3926 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3932 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3934 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3935 unsigned int inohash
= lockowner_ino_hashval(inode
,
3936 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3938 list_add(&lo
->lo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
3939 list_add(&lo
->lo_owner_ino_hash
, &lockowner_ino_hashtbl
[inohash
]);
3940 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3944 * Alloc a lock owner structure.
3945 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3948 * strhashval = ownerstr_hashval
3951 static struct nfs4_lockowner
*
3952 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3953 struct nfs4_lockowner
*lo
;
3955 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3958 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3959 lo
->lo_owner
.so_is_open_owner
= 0;
3960 /* It is the openowner seqid that will be incremented in encode in the
3961 * case of new lockowners; so increment the lock seqid manually: */
3962 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3963 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3967 static struct nfs4_ol_stateid
*
3968 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3970 struct nfs4_ol_stateid
*stp
;
3971 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3973 stp
= nfs4_alloc_stateid(clp
);
3976 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3977 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3978 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3979 stp
->st_stateowner
= &lo
->lo_owner
;
3982 stp
->st_access_bmap
= 0;
3983 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3984 stp
->st_openstp
= open_stp
;
3989 check_lock_length(u64 offset
, u64 length
)
3991 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3992 LOFF_OVERFLOW(offset
, length
)));
3995 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
3997 struct nfs4_file
*fp
= lock_stp
->st_file
;
3998 int oflag
= nfs4_access_to_omode(access
);
4000 if (test_access(access
, lock_stp
))
4002 nfs4_file_get_access(fp
, oflag
);
4003 set_access(access
, lock_stp
);
4006 static __be32
lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
, struct nfs4_ol_stateid
*ost
, struct nfsd4_lock
*lock
, struct nfs4_ol_stateid
**lst
, bool *new)
4008 struct nfs4_file
*fi
= ost
->st_file
;
4009 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4010 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4011 struct nfs4_lockowner
*lo
;
4012 unsigned int strhashval
;
4014 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
, &lock
->v
.new.owner
);
4016 if (!cstate
->minorversion
)
4017 return nfserr_bad_seqid
;
4018 /* XXX: a lockowner always has exactly one stateid: */
4019 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4020 struct nfs4_ol_stateid
, st_perstateowner
);
4023 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4024 &lock
->v
.new.owner
);
4025 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4027 return nfserr_jukebox
;
4028 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4030 release_lockowner(lo
);
4031 return nfserr_jukebox
;
4041 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4042 struct nfsd4_lock
*lock
)
4044 struct nfs4_openowner
*open_sop
= NULL
;
4045 struct nfs4_lockowner
*lock_sop
= NULL
;
4046 struct nfs4_ol_stateid
*lock_stp
;
4047 struct file
*filp
= NULL
;
4048 struct file_lock file_lock
;
4049 struct file_lock conflock
;
4051 bool new_state
= false;
4054 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4056 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4057 (long long) lock
->lk_offset
,
4058 (long long) lock
->lk_length
);
4060 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4061 return nfserr_inval
;
4063 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4064 S_IFREG
, NFSD_MAY_LOCK
))) {
4065 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4071 if (lock
->lk_is_new
) {
4072 struct nfs4_ol_stateid
*open_stp
= NULL
;
4074 if (nfsd4_has_session(cstate
))
4075 /* See rfc 5661 18.10.3: given clientid is ignored: */
4076 memcpy(&lock
->v
.new.clientid
,
4077 &cstate
->session
->se_client
->cl_clientid
,
4078 sizeof(clientid_t
));
4080 status
= nfserr_stale_clientid
;
4081 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4084 /* validate and update open stateid and open seqid */
4085 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4086 lock
->lk_new_open_seqid
,
4087 &lock
->lk_new_open_stateid
,
4091 open_sop
= openowner(open_stp
->st_stateowner
);
4092 status
= nfserr_bad_stateid
;
4093 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4094 &lock
->v
.new.clientid
))
4096 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4097 &lock_stp
, &new_state
);
4099 status
= nfs4_preprocess_seqid_op(cstate
,
4100 lock
->lk_old_lock_seqid
,
4101 &lock
->lk_old_lock_stateid
,
4102 NFS4_LOCK_STID
, &lock_stp
);
4105 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4107 lkflg
= setlkflg(lock
->lk_type
);
4108 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4112 status
= nfserr_grace
;
4113 if (locks_in_grace(SVC_NET(rqstp
)) && !lock
->lk_reclaim
)
4115 status
= nfserr_no_grace
;
4116 if (!locks_in_grace(SVC_NET(rqstp
)) && lock
->lk_reclaim
)
4119 locks_init_lock(&file_lock
);
4120 switch (lock
->lk_type
) {
4123 filp
= find_readable_file(lock_stp
->st_file
);
4125 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4126 file_lock
.fl_type
= F_RDLCK
;
4129 case NFS4_WRITEW_LT
:
4130 filp
= find_writeable_file(lock_stp
->st_file
);
4132 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4133 file_lock
.fl_type
= F_WRLCK
;
4136 status
= nfserr_inval
;
4140 status
= nfserr_openmode
;
4143 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4144 file_lock
.fl_pid
= current
->tgid
;
4145 file_lock
.fl_file
= filp
;
4146 file_lock
.fl_flags
= FL_POSIX
;
4147 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4149 file_lock
.fl_start
= lock
->lk_offset
;
4150 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4151 nfs4_transform_lock_offset(&file_lock
);
4154 * Try to lock the file in the VFS.
4155 * Note: locks.c uses the BKL to protect the inode's lock list.
4158 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4160 case 0: /* success! */
4161 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4162 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4166 case (EAGAIN
): /* conflock holds conflicting lock */
4167 status
= nfserr_denied
;
4168 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4169 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4172 status
= nfserr_deadlock
;
4175 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4176 status
= nfserrno(err
);
4180 if (status
&& new_state
)
4181 release_lockowner(lock_sop
);
4182 if (!cstate
->replay_owner
)
4183 nfs4_unlock_state();
4188 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4189 * so we do a temporary open here just to get an open file to pass to
4190 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4193 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4196 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4198 err
= nfserrno(vfs_test_lock(file
, lock
));
4208 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4209 struct nfsd4_lockt
*lockt
)
4211 struct inode
*inode
;
4212 struct file_lock file_lock
;
4213 struct nfs4_lockowner
*lo
;
4215 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4217 if (locks_in_grace(SVC_NET(rqstp
)))
4218 return nfserr_grace
;
4220 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4221 return nfserr_inval
;
4225 status
= nfserr_stale_clientid
;
4226 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
, nn
))
4229 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4232 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4233 locks_init_lock(&file_lock
);
4234 switch (lockt
->lt_type
) {
4237 file_lock
.fl_type
= F_RDLCK
;
4240 case NFS4_WRITEW_LT
:
4241 file_lock
.fl_type
= F_WRLCK
;
4244 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4245 status
= nfserr_inval
;
4249 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4251 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4252 file_lock
.fl_pid
= current
->tgid
;
4253 file_lock
.fl_flags
= FL_POSIX
;
4255 file_lock
.fl_start
= lockt
->lt_offset
;
4256 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4258 nfs4_transform_lock_offset(&file_lock
);
4260 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4264 if (file_lock
.fl_type
!= F_UNLCK
) {
4265 status
= nfserr_denied
;
4266 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4269 nfs4_unlock_state();
4274 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4275 struct nfsd4_locku
*locku
)
4277 struct nfs4_ol_stateid
*stp
;
4278 struct file
*filp
= NULL
;
4279 struct file_lock file_lock
;
4283 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4284 (long long) locku
->lu_offset
,
4285 (long long) locku
->lu_length
);
4287 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4288 return nfserr_inval
;
4292 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4293 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4296 filp
= find_any_file(stp
->st_file
);
4298 status
= nfserr_lock_range
;
4302 locks_init_lock(&file_lock
);
4303 file_lock
.fl_type
= F_UNLCK
;
4304 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4305 file_lock
.fl_pid
= current
->tgid
;
4306 file_lock
.fl_file
= filp
;
4307 file_lock
.fl_flags
= FL_POSIX
;
4308 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4309 file_lock
.fl_start
= locku
->lu_offset
;
4311 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4312 nfs4_transform_lock_offset(&file_lock
);
4315 * Try to unlock the file in the VFS.
4317 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4319 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4323 * OK, unlock succeeded; the only thing left to do is update the stateid.
4325 update_stateid(&stp
->st_stid
.sc_stateid
);
4326 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4329 if (!cstate
->replay_owner
)
4330 nfs4_unlock_state();
4334 status
= nfserrno(err
);
4340 * 1: locks held by lockowner
4341 * 0: no locks held by lockowner
4344 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4346 struct file_lock
**flpp
;
4347 struct inode
*inode
= filp
->fi_inode
;
4351 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4352 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4363 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4364 struct nfsd4_compound_state
*cstate
,
4365 struct nfsd4_release_lockowner
*rlockowner
)
4367 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4368 struct nfs4_stateowner
*sop
;
4369 struct nfs4_lockowner
*lo
;
4370 struct nfs4_ol_stateid
*stp
;
4371 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4372 struct list_head matches
;
4373 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4375 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4377 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4378 clid
->cl_boot
, clid
->cl_id
);
4380 /* XXX check for lease expiration */
4382 status
= nfserr_stale_clientid
;
4383 if (STALE_CLIENTID(clid
, nn
))
4388 status
= nfserr_locks_held
;
4389 INIT_LIST_HEAD(&matches
);
4391 list_for_each_entry(sop
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
4392 if (sop
->so_is_open_owner
)
4394 if (!same_owner_str(sop
, owner
, clid
))
4396 list_for_each_entry(stp
, &sop
->so_stateids
,
4398 lo
= lockowner(sop
);
4399 if (check_for_locks(stp
->st_file
, lo
))
4401 list_add(&lo
->lo_list
, &matches
);
4404 /* Clients probably won't expect us to return with some (but not all)
4405 * of the lockowner state released; so don't release any until all
4406 * have been checked. */
4408 while (!list_empty(&matches
)) {
4409 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4411 /* unhash_stateowner deletes so_perclient only
4412 * for openowners. */
4413 list_del(&lo
->lo_list
);
4414 release_lockowner(lo
);
4417 nfs4_unlock_state();
4421 static inline struct nfs4_client_reclaim
*
4424 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4428 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4430 unsigned int strhashval
= clientstr_hashval(name
);
4431 struct nfs4_client
*clp
;
4433 clp
= find_confirmed_client_by_str(name
, strhashval
);
4436 return test_bit(NFSD4_CLIENT_STABLE
, &clp
->cl_flags
);
4440 * failure => all reset bets are off, nfserr_no_grace...
4443 nfs4_client_to_reclaim(const char *name
)
4445 unsigned int strhashval
;
4446 struct nfs4_client_reclaim
*crp
= NULL
;
4448 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4449 crp
= alloc_reclaim();
4452 strhashval
= clientstr_hashval(name
);
4453 INIT_LIST_HEAD(&crp
->cr_strhash
);
4454 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4455 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4456 reclaim_str_hashtbl_size
++;
4461 nfs4_release_reclaim(void)
4463 struct nfs4_client_reclaim
*crp
= NULL
;
4466 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4467 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4468 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4469 struct nfs4_client_reclaim
, cr_strhash
);
4470 list_del(&crp
->cr_strhash
);
4472 reclaim_str_hashtbl_size
--;
4475 BUG_ON(reclaim_str_hashtbl_size
);
4479 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4480 struct nfs4_client_reclaim
*
4481 nfsd4_find_reclaim_client(struct nfs4_client
*clp
)
4483 unsigned int strhashval
;
4484 struct nfs4_client_reclaim
*crp
= NULL
;
4486 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4487 clp
->cl_name
.len
, clp
->cl_name
.data
,
4490 /* find clp->cl_name in reclaim_str_hashtbl */
4491 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4492 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4493 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4501 * Called from OPEN. Look for clientid in reclaim list.
4504 nfs4_check_open_reclaim(clientid_t
*clid
)
4506 struct nfs4_client
*clp
;
4508 /* find clientid in conf_id_hashtbl */
4509 clp
= find_confirmed_client(clid
);
4511 return nfserr_reclaim_bad
;
4513 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4516 #ifdef CONFIG_NFSD_FAULT_INJECTION
4518 void nfsd_forget_clients(u64 num
)
4520 struct nfs4_client
*clp
, *next
;
4524 list_for_each_entry_safe(clp
, next
, &client_lru
, cl_lru
) {
4525 nfsd4_client_record_remove(clp
);
4530 nfs4_unlock_state();
4532 printk(KERN_INFO
"NFSD: Forgot %d clients", count
);
4535 static void release_lockowner_sop(struct nfs4_stateowner
*sop
)
4537 release_lockowner(lockowner(sop
));
4540 static void release_openowner_sop(struct nfs4_stateowner
*sop
)
4542 release_openowner(openowner(sop
));
4545 static int nfsd_release_n_owners(u64 num
, bool is_open_owner
,
4546 void (*release_sop
)(struct nfs4_stateowner
*))
4549 struct nfs4_stateowner
*sop
, *next
;
4551 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4552 list_for_each_entry_safe(sop
, next
, &ownerstr_hashtbl
[i
], so_strhash
) {
4553 if (sop
->so_is_open_owner
!= is_open_owner
)
4563 void nfsd_forget_locks(u64 num
)
4568 count
= nfsd_release_n_owners(num
, false, release_lockowner_sop
);
4569 nfs4_unlock_state();
4571 printk(KERN_INFO
"NFSD: Forgot %d locks", count
);
4574 void nfsd_forget_openowners(u64 num
)
4579 count
= nfsd_release_n_owners(num
, true, release_openowner_sop
);
4580 nfs4_unlock_state();
4582 printk(KERN_INFO
"NFSD: Forgot %d open owners", count
);
4585 int nfsd_process_n_delegations(u64 num
, struct list_head
*list
)
4588 struct nfs4_file
*fp
, *fnext
;
4589 struct nfs4_delegation
*dp
, *dnext
;
4591 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4592 list_for_each_entry_safe(fp
, fnext
, &file_hashtbl
[i
], fi_hash
) {
4593 list_for_each_entry_safe(dp
, dnext
, &fp
->fi_delegations
, dl_perfile
) {
4594 list_move(&dp
->dl_recall_lru
, list
);
4604 void nfsd_forget_delegations(u64 num
)
4608 struct nfs4_delegation
*dp
, *dnext
;
4610 spin_lock(&recall_lock
);
4611 count
= nfsd_process_n_delegations(num
, &victims
);
4612 spin_unlock(&recall_lock
);
4615 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
)
4616 unhash_delegation(dp
);
4617 nfs4_unlock_state();
4619 printk(KERN_INFO
"NFSD: Forgot %d delegations", count
);
4622 void nfsd_recall_delegations(u64 num
)
4626 struct nfs4_delegation
*dp
, *dnext
;
4628 spin_lock(&recall_lock
);
4629 count
= nfsd_process_n_delegations(num
, &victims
);
4630 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
) {
4631 list_del(&dp
->dl_recall_lru
);
4632 nfsd_break_one_deleg(dp
);
4634 spin_unlock(&recall_lock
);
4636 printk(KERN_INFO
"NFSD: Recalled %d delegations", count
);
4639 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4641 /* initialization to perform at module load time: */
4644 nfs4_state_init(void)
4648 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4649 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4650 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4651 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4652 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4653 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4655 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4656 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4657 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4658 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4660 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4661 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4663 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4664 INIT_LIST_HEAD(&lockowner_ino_hashtbl
[i
]);
4665 INIT_LIST_HEAD(&close_lru
);
4666 INIT_LIST_HEAD(&client_lru
);
4667 INIT_LIST_HEAD(&del_recall_lru
);
4668 reclaim_str_hashtbl_size
= 0;
4672 * Since the lifetime of a delegation isn't limited to that of an open, a
4673 * client may quite reasonably hang on to a delegation as long as it has
4674 * the inode cached. This becomes an obvious problem the first time a
4675 * client's inode cache approaches the size of the server's total memory.
4677 * For now we avoid this problem by imposing a hard limit on the number
4678 * of delegations, which varies according to the server's memory size.
4681 set_max_delegations(void)
4684 * Allow at most 4 delegations per megabyte of RAM. Quick
4685 * estimates suggest that in the worst case (where every delegation
4686 * is for a different inode), a delegation could take about 1.5K,
4687 * giving a worst case usage of about 6% of memory.
4689 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4692 /* initialization to perform when the nfsd service is started: */
4695 nfs4_state_start(void)
4697 struct net
*net
= &init_net
;
4698 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4702 * FIXME: For now, we hang most of the pernet global stuff off of
4703 * init_net until nfsd is fully containerized. Eventually, we'll
4704 * need to pass a net pointer into this function, take a reference
4705 * to that instead and then do most of the rest of this on a per-net
4709 nfsd4_client_tracking_init(net
);
4710 nn
->boot_time
= get_seconds();
4711 locks_start_grace(net
, &nn
->nfsd4_manager
);
4712 nn
->grace_ended
= false;
4713 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4715 ret
= set_callback_cred();
4720 laundry_wq
= create_singlethread_workqueue("nfsd4");
4721 if (laundry_wq
== NULL
) {
4725 ret
= nfsd4_create_callback_queue();
4727 goto out_free_laundry
;
4728 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4729 set_max_delegations();
4732 destroy_workqueue(laundry_wq
);
4734 nfsd4_client_tracking_exit(net
);
4740 __nfs4_state_shutdown(void)
4743 struct nfs4_client
*clp
= NULL
;
4744 struct nfs4_delegation
*dp
= NULL
;
4745 struct list_head
*pos
, *next
, reaplist
;
4747 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4748 while (!list_empty(&conf_id_hashtbl
[i
])) {
4749 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4752 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4753 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4757 INIT_LIST_HEAD(&reaplist
);
4758 spin_lock(&recall_lock
);
4759 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4760 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4761 list_move(&dp
->dl_recall_lru
, &reaplist
);
4763 spin_unlock(&recall_lock
);
4764 list_for_each_safe(pos
, next
, &reaplist
) {
4765 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4766 unhash_delegation(dp
);
4769 nfsd4_client_tracking_exit(&init_net
);
4774 nfs4_state_shutdown(void)
4776 struct net
*net
= &init_net
;
4777 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4779 cancel_delayed_work_sync(&laundromat_work
);
4780 destroy_workqueue(laundry_wq
);
4781 locks_end_grace(&nn
->nfsd4_manager
);
4783 __nfs4_state_shutdown();
4784 nfs4_unlock_state();
4785 nfsd4_destroy_callback_queue();
4789 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4791 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4792 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4796 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4798 if (cstate
->minorversion
) {
4799 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4800 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4805 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
4807 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4811 * functions to set current state id
4814 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4816 put_stateid(cstate
, &odp
->od_stateid
);
4820 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
4822 put_stateid(cstate
, &open
->op_stateid
);
4826 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4828 put_stateid(cstate
, &close
->cl_stateid
);
4832 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
4834 put_stateid(cstate
, &lock
->lk_resp_stateid
);
4838 * functions to consume current state id
4842 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4844 get_stateid(cstate
, &odp
->od_stateid
);
4848 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
4850 get_stateid(cstate
, &drp
->dr_stateid
);
4854 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
4856 get_stateid(cstate
, &fsp
->fr_stateid
);
4860 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
4862 get_stateid(cstate
, &setattr
->sa_stateid
);
4866 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4868 get_stateid(cstate
, &close
->cl_stateid
);
4872 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
4874 get_stateid(cstate
, &locku
->lu_stateid
);
4878 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
4880 get_stateid(cstate
, &read
->rd_stateid
);
4884 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
4886 get_stateid(cstate
, &write
->wr_stateid
);