2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
46 #include "current_stateid.h"
50 #define NFSDDBG_FACILITY NFSDDBG_PROC
52 #define all_ones {{~0,~0},~0}
53 static const stateid_t one_stateid
= {
55 .si_opaque
= all_ones
,
57 static const stateid_t zero_stateid
= {
60 static const stateid_t currentstateid
= {
64 static u64 current_sessionid
= 1;
66 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
67 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
68 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
75 /* Currently used for almost all code touching nfsv4 state: */
76 static DEFINE_MUTEX(client_mutex
);
79 * Currently used for the del_recall_lru and file hash table. In an
80 * effort to decrease the scope of the client_mutex, this spinlock may
81 * eventually cover more:
83 static DEFINE_SPINLOCK(recall_lock
);
85 static struct kmem_cache
*openowner_slab
= NULL
;
86 static struct kmem_cache
*lockowner_slab
= NULL
;
87 static struct kmem_cache
*file_slab
= NULL
;
88 static struct kmem_cache
*stateid_slab
= NULL
;
89 static struct kmem_cache
*deleg_slab
= NULL
;
94 mutex_lock(&client_mutex
);
97 static void free_session(struct kref
*);
99 /* Must be called under the client_lock */
100 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
102 kref_put(&ses
->se_ref
, free_session
);
105 static void nfsd4_get_session(struct nfsd4_session
*ses
)
107 kref_get(&ses
->se_ref
);
111 nfs4_unlock_state(void)
113 mutex_unlock(&client_mutex
);
117 opaque_hashval(const void *ptr
, int nbytes
)
119 unsigned char *cptr
= (unsigned char *) ptr
;
129 static struct list_head del_recall_lru
;
131 static void nfsd4_free_file(struct nfs4_file
*f
)
133 kmem_cache_free(file_slab
, f
);
137 put_nfs4_file(struct nfs4_file
*fi
)
139 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
140 list_del(&fi
->fi_hash
);
141 spin_unlock(&recall_lock
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 atomic_inc(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned long max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for lock and open owners */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
169 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
171 return ret
& OWNER_HASH_MASK
;
174 /* hash table for nfs4_file */
175 #define FILE_HASH_BITS 8
176 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
178 static unsigned int file_hashval(struct inode
*ino
)
180 /* XXX: why are we hashing on inode pointer, anyway? */
181 return hash_ptr(ino
, FILE_HASH_BITS
);
184 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
186 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
188 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
189 atomic_inc(&fp
->fi_access
[oflag
]);
192 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
194 if (oflag
== O_RDWR
) {
195 __nfs4_file_get_access(fp
, O_RDONLY
);
196 __nfs4_file_get_access(fp
, O_WRONLY
);
198 __nfs4_file_get_access(fp
, oflag
);
201 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
203 if (fp
->fi_fds
[oflag
]) {
204 fput(fp
->fi_fds
[oflag
]);
205 fp
->fi_fds
[oflag
] = NULL
;
209 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
211 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
212 nfs4_file_put_fd(fp
, oflag
);
214 * It's also safe to get rid of the RDWR open *if*
215 * we no longer have need of the other kind of access
216 * or if we already have the other kind of open:
218 if (fp
->fi_fds
[1-oflag
]
219 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
220 nfs4_file_put_fd(fp
, O_RDWR
);
224 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
226 if (oflag
== O_RDWR
) {
227 __nfs4_file_put_access(fp
, O_RDONLY
);
228 __nfs4_file_put_access(fp
, O_WRONLY
);
230 __nfs4_file_put_access(fp
, oflag
);
233 static inline int get_new_stid(struct nfs4_stid
*stid
)
235 static int min_stateid
= 0;
236 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
240 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
242 * Note: the necessary preallocation was done in
243 * nfs4_alloc_stateid(). The idr code caps the number of
244 * preallocations that can exist at a time, but the state lock
245 * prevents anyone from using ours before we get here:
249 * It shouldn't be a problem to reuse an opaque stateid value.
250 * I don't think it is for 4.1. But with 4.0 I worry that, for
251 * example, a stray write retransmission could be accepted by
252 * the server when it should have been rejected. Therefore,
253 * adopt a trick from the sctp code to attempt to maximize the
254 * amount of time until an id is reused, by ensuring they always
255 * "increase" (mod INT_MAX):
258 min_stateid
= new_stid
+1;
259 if (min_stateid
== INT_MAX
)
264 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
267 struct idr
*stateids
= &cl
->cl_stateids
;
268 static int min_stateid
= 0;
269 struct nfs4_stid
*stid
;
272 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
276 if (!idr_pre_get(stateids
, GFP_KERNEL
))
278 if (idr_get_new_above(stateids
, stid
, min_stateid
, &new_id
))
280 stid
->sc_client
= cl
;
282 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
283 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
284 /* Will be incremented before return to client: */
285 stid
->sc_stateid
.si_generation
= 0;
288 * It shouldn't be a problem to reuse an opaque stateid value.
289 * I don't think it is for 4.1. But with 4.0 I worry that, for
290 * example, a stray write retransmission could be accepted by
291 * the server when it should have been rejected. Therefore,
292 * adopt a trick from the sctp code to attempt to maximize the
293 * amount of time until an id is reused, by ensuring they always
294 * "increase" (mod INT_MAX):
297 min_stateid
= new_id
+1;
298 if (min_stateid
== INT_MAX
)
306 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
308 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
311 static struct nfs4_delegation
*
312 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
314 struct nfs4_delegation
*dp
;
315 struct nfs4_file
*fp
= stp
->st_file
;
317 dprintk("NFSD alloc_init_deleg\n");
319 * Major work on the lease subsystem (for example, to support
320 * calbacks on stat) will be required before we can support
321 * write delegations properly.
323 if (type
!= NFS4_OPEN_DELEGATE_READ
)
325 if (fp
->fi_had_conflict
)
327 if (num_delegations
> max_delegations
)
329 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
332 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
334 * delegation seqid's are never incremented. The 4.1 special
335 * meaning of seqid 0 isn't meaningful, really, but let's avoid
336 * 0 anyway just for consistency and use 1:
338 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
340 INIT_LIST_HEAD(&dp
->dl_perfile
);
341 INIT_LIST_HEAD(&dp
->dl_perclnt
);
342 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
346 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
348 atomic_set(&dp
->dl_count
, 1);
349 nfsd4_init_callback(&dp
->dl_recall
);
353 static void free_stid(struct nfs4_stid
*s
, struct kmem_cache
*slab
)
355 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
357 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
358 kmem_cache_free(slab
, s
);
362 nfs4_put_delegation(struct nfs4_delegation
*dp
)
364 if (atomic_dec_and_test(&dp
->dl_count
)) {
365 dprintk("NFSD: freeing dp %p\n",dp
);
366 put_nfs4_file(dp
->dl_file
);
367 free_stid(&dp
->dl_stid
, deleg_slab
);
372 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
374 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
375 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
377 fput(fp
->fi_deleg_file
);
378 fp
->fi_deleg_file
= NULL
;
382 static void unhash_stid(struct nfs4_stid
*s
)
387 /* Called under the state lock. */
389 unhash_delegation(struct nfs4_delegation
*dp
)
391 unhash_stid(&dp
->dl_stid
);
392 list_del_init(&dp
->dl_perclnt
);
393 spin_lock(&recall_lock
);
394 list_del_init(&dp
->dl_perfile
);
395 list_del_init(&dp
->dl_recall_lru
);
396 spin_unlock(&recall_lock
);
397 nfs4_put_deleg_lease(dp
->dl_file
);
398 nfs4_put_delegation(dp
);
405 static unsigned int clientid_hashval(u32 id
)
407 return id
& CLIENT_HASH_MASK
;
410 static unsigned int clientstr_hashval(const char *name
)
412 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
416 * We store the NONE, READ, WRITE, and BOTH bits separately in the
417 * st_{access,deny}_bmap field of the stateid, in order to track not
418 * only what share bits are currently in force, but also what
419 * combinations of share bits previous opens have used. This allows us
420 * to enforce the recommendation of rfc 3530 14.2.19 that the server
421 * return an error if the client attempt to downgrade to a combination
422 * of share bits not explicable by closing some of its previous opens.
424 * XXX: This enforcement is actually incomplete, since we don't keep
425 * track of access/deny bit combinations; so, e.g., we allow:
427 * OPEN allow read, deny write
428 * OPEN allow both, deny none
429 * DOWNGRADE allow read, deny none
431 * which we should reject.
434 bmap_to_share_mode(unsigned long bmap
) {
436 unsigned int access
= 0;
438 for (i
= 1; i
< 4; i
++) {
439 if (test_bit(i
, &bmap
))
446 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
447 unsigned int access
, deny
;
449 access
= bmap_to_share_mode(stp
->st_access_bmap
);
450 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
451 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
456 /* set share access for a given stateid */
458 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
460 __set_bit(access
, &stp
->st_access_bmap
);
463 /* clear share access for a given stateid */
465 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
467 __clear_bit(access
, &stp
->st_access_bmap
);
470 /* test whether a given stateid has access */
472 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
474 return test_bit(access
, &stp
->st_access_bmap
);
477 /* set share deny for a given stateid */
479 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
481 __set_bit(access
, &stp
->st_deny_bmap
);
484 /* clear share deny for a given stateid */
486 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
488 __clear_bit(access
, &stp
->st_deny_bmap
);
491 /* test whether a given stateid is denying specific access */
493 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
495 return test_bit(access
, &stp
->st_deny_bmap
);
498 static int nfs4_access_to_omode(u32 access
)
500 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
501 case NFS4_SHARE_ACCESS_READ
:
503 case NFS4_SHARE_ACCESS_WRITE
:
505 case NFS4_SHARE_ACCESS_BOTH
:
512 /* release all access and file references for a given stateid */
514 release_all_access(struct nfs4_ol_stateid
*stp
)
518 for (i
= 1; i
< 4; i
++) {
519 if (test_access(i
, stp
))
520 nfs4_file_put_access(stp
->st_file
,
521 nfs4_access_to_omode(i
));
522 clear_access(i
, stp
);
526 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
528 list_del(&stp
->st_perfile
);
529 list_del(&stp
->st_perstateowner
);
532 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
534 release_all_access(stp
);
535 put_nfs4_file(stp
->st_file
);
539 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
541 free_stid(&stp
->st_stid
, stateid_slab
);
544 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
548 unhash_generic_stateid(stp
);
549 unhash_stid(&stp
->st_stid
);
550 file
= find_any_file(stp
->st_file
);
552 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
553 close_generic_stateid(stp
);
554 free_generic_stateid(stp
);
557 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
559 struct nfs4_ol_stateid
*stp
;
561 list_del(&lo
->lo_owner
.so_strhash
);
562 list_del(&lo
->lo_perstateid
);
563 list_del(&lo
->lo_owner_ino_hash
);
564 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
565 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
566 struct nfs4_ol_stateid
, st_perstateowner
);
567 release_lock_stateid(stp
);
571 static void release_lockowner(struct nfs4_lockowner
*lo
)
573 unhash_lockowner(lo
);
574 nfs4_free_lockowner(lo
);
578 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
580 struct nfs4_lockowner
*lo
;
582 while (!list_empty(&open_stp
->st_lockowners
)) {
583 lo
= list_entry(open_stp
->st_lockowners
.next
,
584 struct nfs4_lockowner
, lo_perstateid
);
585 release_lockowner(lo
);
589 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
591 unhash_generic_stateid(stp
);
592 release_stateid_lockowners(stp
);
593 close_generic_stateid(stp
);
596 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
598 unhash_open_stateid(stp
);
599 unhash_stid(&stp
->st_stid
);
600 free_generic_stateid(stp
);
603 static void unhash_openowner(struct nfs4_openowner
*oo
)
605 struct nfs4_ol_stateid
*stp
;
607 list_del(&oo
->oo_owner
.so_strhash
);
608 list_del(&oo
->oo_perclient
);
609 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
610 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
611 struct nfs4_ol_stateid
, st_perstateowner
);
612 release_open_stateid(stp
);
616 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
618 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
621 unhash_stid(&s
->st_stid
);
622 free_generic_stateid(s
);
623 oo
->oo_last_closed_stid
= NULL
;
627 static void release_openowner(struct nfs4_openowner
*oo
)
629 unhash_openowner(oo
);
630 list_del(&oo
->oo_close_lru
);
631 release_last_closed_stateid(oo
);
632 nfs4_free_openowner(oo
);
636 hash_sessionid(struct nfs4_sessionid
*sessionid
)
638 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
640 return sid
->sequence
% SESSION_HASH_SIZE
;
645 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
647 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
648 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
652 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
659 gen_sessionid(struct nfsd4_session
*ses
)
661 struct nfs4_client
*clp
= ses
->se_client
;
662 struct nfsd4_sessionid
*sid
;
664 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
665 sid
->clientid
= clp
->cl_clientid
;
666 sid
->sequence
= current_sessionid
++;
671 * The protocol defines ca_maxresponssize_cached to include the size of
672 * the rpc header, but all we need to cache is the data starting after
673 * the end of the initial SEQUENCE operation--the rest we regenerate
674 * each time. Therefore we can advertise a ca_maxresponssize_cached
675 * value that is the number of bytes in our cache plus a few additional
676 * bytes. In order to stay on the safe side, and not promise more than
677 * we can cache, those additional bytes must be the minimum possible: 24
678 * bytes of rpc header (xid through accept state, with AUTH_NULL
679 * verifier), 12 for the compound header (with zero-length tag), and 44
680 * for the SEQUENCE op response:
682 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
685 free_session_slots(struct nfsd4_session
*ses
)
689 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
690 kfree(ses
->se_slots
[i
]);
694 * We don't actually need to cache the rpc and session headers, so we
695 * can allocate a little less for each slot:
697 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
699 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
702 static int nfsd4_sanitize_slot_size(u32 size
)
704 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
705 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
711 * XXX: If we run out of reserved DRC memory we could (up to a point)
712 * re-negotiate active sessions and reduce their slot usage to make
713 * room for new connections. For now we just fail the create session.
715 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
719 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
721 spin_lock(&nfsd_drc_lock
);
722 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
723 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
724 num
= min_t(int, num
, avail
/ slotsize
);
725 nfsd_drc_mem_used
+= num
* slotsize
;
726 spin_unlock(&nfsd_drc_lock
);
731 static void nfsd4_put_drc_mem(int slotsize
, int num
)
733 spin_lock(&nfsd_drc_lock
);
734 nfsd_drc_mem_used
-= slotsize
* num
;
735 spin_unlock(&nfsd_drc_lock
);
738 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
740 struct nfsd4_session
*new;
743 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
744 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
745 mem
= numslots
* sizeof(struct nfsd4_slot
*);
747 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
750 /* allocate each struct nfsd4_slot and data cache in one piece */
751 for (i
= 0; i
< numslots
; i
++) {
752 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
753 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
754 if (!new->se_slots
[i
])
760 kfree(new->se_slots
[i
]);
765 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new,
766 struct nfsd4_channel_attrs
*req
,
767 int numslots
, int slotsize
,
770 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
772 new->maxreqs
= numslots
;
773 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
774 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
775 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
776 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
777 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
780 static void free_conn(struct nfsd4_conn
*c
)
782 svc_xprt_put(c
->cn_xprt
);
786 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
788 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
789 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
791 spin_lock(&clp
->cl_lock
);
792 if (!list_empty(&c
->cn_persession
)) {
793 list_del(&c
->cn_persession
);
796 spin_unlock(&clp
->cl_lock
);
797 nfsd4_probe_callback(clp
);
800 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
802 struct nfsd4_conn
*conn
;
804 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
807 svc_xprt_get(rqstp
->rq_xprt
);
808 conn
->cn_xprt
= rqstp
->rq_xprt
;
809 conn
->cn_flags
= flags
;
810 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
814 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
816 conn
->cn_session
= ses
;
817 list_add(&conn
->cn_persession
, &ses
->se_conns
);
820 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
822 struct nfs4_client
*clp
= ses
->se_client
;
824 spin_lock(&clp
->cl_lock
);
825 __nfsd4_hash_conn(conn
, ses
);
826 spin_unlock(&clp
->cl_lock
);
829 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
831 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
832 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
835 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
839 nfsd4_hash_conn(conn
, ses
);
840 ret
= nfsd4_register_conn(conn
);
842 /* oops; xprt is already down: */
843 nfsd4_conn_lost(&conn
->cn_xpt_user
);
844 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
845 /* callback channel may be back up */
846 nfsd4_probe_callback(ses
->se_client
);
850 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
852 u32 dir
= NFS4_CDFC4_FORE
;
854 if (cses
->flags
& SESSION4_BACK_CHAN
)
855 dir
|= NFS4_CDFC4_BACK
;
856 return alloc_conn(rqstp
, dir
);
859 /* must be called under client_lock */
860 static void nfsd4_del_conns(struct nfsd4_session
*s
)
862 struct nfs4_client
*clp
= s
->se_client
;
863 struct nfsd4_conn
*c
;
865 spin_lock(&clp
->cl_lock
);
866 while (!list_empty(&s
->se_conns
)) {
867 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
868 list_del_init(&c
->cn_persession
);
869 spin_unlock(&clp
->cl_lock
);
871 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
874 spin_lock(&clp
->cl_lock
);
876 spin_unlock(&clp
->cl_lock
);
879 static void __free_session(struct nfsd4_session
*ses
)
881 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
882 free_session_slots(ses
);
886 static void free_session(struct kref
*kref
)
888 struct nfsd4_session
*ses
;
891 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
892 nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
894 lockdep_assert_held(&nn
->client_lock
);
895 nfsd4_del_conns(ses
);
899 void nfsd4_put_session(struct nfsd4_session
*ses
)
901 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
903 spin_lock(&nn
->client_lock
);
904 nfsd4_put_session_locked(ses
);
905 spin_unlock(&nn
->client_lock
);
908 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
,
911 struct nfsd4_session
*new;
912 int numslots
, slotsize
;
914 * Note decreasing slot size below client's request may
915 * make it difficult for client to function correctly, whereas
916 * decreasing the number of slots will (just?) affect
917 * performance. When short on memory we therefore prefer to
918 * decrease number of slots instead of their size.
920 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
921 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
925 new = __alloc_session(slotsize
, numslots
);
927 nfsd4_put_drc_mem(slotsize
, numslots
);
930 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
, nn
);
934 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
937 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
939 new->se_client
= clp
;
942 INIT_LIST_HEAD(&new->se_conns
);
944 new->se_cb_seq_nr
= 1;
945 new->se_flags
= cses
->flags
;
946 new->se_cb_prog
= cses
->callback_prog
;
947 new->se_cb_sec
= cses
->cb_sec
;
948 kref_init(&new->se_ref
);
949 idx
= hash_sessionid(&new->se_sessionid
);
950 spin_lock(&nn
->client_lock
);
951 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
952 spin_lock(&clp
->cl_lock
);
953 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
954 spin_unlock(&clp
->cl_lock
);
955 spin_unlock(&nn
->client_lock
);
957 if (cses
->flags
& SESSION4_BACK_CHAN
) {
958 struct sockaddr
*sa
= svc_addr(rqstp
);
960 * This is a little silly; with sessions there's no real
961 * use for the callback address. Use the peer address
962 * as a reasonable default for now, but consider fixing
963 * the rpc client not to require an address in the
966 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
967 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
971 /* caller must hold client_lock */
972 static struct nfsd4_session
*
973 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
975 struct nfsd4_session
*elem
;
977 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
979 dump_sessionid(__func__
, sessionid
);
980 idx
= hash_sessionid(sessionid
);
981 /* Search in the appropriate list */
982 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
983 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
984 NFS4_MAX_SESSIONID_LEN
)) {
989 dprintk("%s: session not found\n", __func__
);
993 /* caller must hold client_lock */
995 unhash_session(struct nfsd4_session
*ses
)
997 list_del(&ses
->se_hash
);
998 spin_lock(&ses
->se_client
->cl_lock
);
999 list_del(&ses
->se_perclnt
);
1000 spin_unlock(&ses
->se_client
->cl_lock
);
1003 /* must be called under the client_lock */
1005 renew_client_locked(struct nfs4_client
*clp
)
1007 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1009 if (is_client_expired(clp
)) {
1011 printk("%s: client (clientid %08x/%08x) already expired\n",
1013 clp
->cl_clientid
.cl_boot
,
1014 clp
->cl_clientid
.cl_id
);
1018 dprintk("renewing client (clientid %08x/%08x)\n",
1019 clp
->cl_clientid
.cl_boot
,
1020 clp
->cl_clientid
.cl_id
);
1021 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
1022 clp
->cl_time
= get_seconds();
1026 renew_client(struct nfs4_client
*clp
)
1028 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1030 spin_lock(&nn
->client_lock
);
1031 renew_client_locked(clp
);
1032 spin_unlock(&nn
->client_lock
);
1035 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1037 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1039 if (clid
->cl_boot
== nn
->boot_time
)
1041 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1042 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1047 * XXX Should we use a slab cache ?
1048 * This type of memory management is somewhat inefficient, but we use it
1049 * anyway since SETCLIENTID is not a common operation.
1051 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1053 struct nfs4_client
*clp
;
1055 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1058 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1059 if (clp
->cl_name
.data
== NULL
) {
1063 clp
->cl_name
.len
= name
.len
;
1068 free_client(struct nfs4_client
*clp
)
1070 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1072 lockdep_assert_held(&nn
->client_lock
);
1073 while (!list_empty(&clp
->cl_sessions
)) {
1074 struct nfsd4_session
*ses
;
1075 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1077 list_del(&ses
->se_perclnt
);
1078 nfsd4_put_session_locked(ses
);
1080 free_svc_cred(&clp
->cl_cred
);
1081 kfree(clp
->cl_name
.data
);
1082 idr_destroy(&clp
->cl_stateids
);
1087 release_session_client(struct nfsd4_session
*session
)
1089 struct nfs4_client
*clp
= session
->se_client
;
1090 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1092 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
1094 if (is_client_expired(clp
)) {
1096 session
->se_client
= NULL
;
1098 renew_client_locked(clp
);
1099 spin_unlock(&nn
->client_lock
);
1102 /* must be called under the client_lock */
1104 unhash_client_locked(struct nfs4_client
*clp
)
1106 struct nfsd4_session
*ses
;
1108 mark_client_expired(clp
);
1109 list_del(&clp
->cl_lru
);
1110 spin_lock(&clp
->cl_lock
);
1111 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1112 list_del_init(&ses
->se_hash
);
1113 spin_unlock(&clp
->cl_lock
);
1117 destroy_client(struct nfs4_client
*clp
)
1119 struct nfs4_openowner
*oo
;
1120 struct nfs4_delegation
*dp
;
1121 struct list_head reaplist
;
1122 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1124 INIT_LIST_HEAD(&reaplist
);
1125 spin_lock(&recall_lock
);
1126 while (!list_empty(&clp
->cl_delegations
)) {
1127 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1128 list_del_init(&dp
->dl_perclnt
);
1129 list_move(&dp
->dl_recall_lru
, &reaplist
);
1131 spin_unlock(&recall_lock
);
1132 while (!list_empty(&reaplist
)) {
1133 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1134 unhash_delegation(dp
);
1136 while (!list_empty(&clp
->cl_openowners
)) {
1137 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1138 release_openowner(oo
);
1140 nfsd4_shutdown_callback(clp
);
1141 if (clp
->cl_cb_conn
.cb_xprt
)
1142 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1143 list_del(&clp
->cl_idhash
);
1144 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1145 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1147 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1148 spin_lock(&nn
->client_lock
);
1149 unhash_client_locked(clp
);
1150 if (atomic_read(&clp
->cl_refcount
) == 0)
1152 spin_unlock(&nn
->client_lock
);
1155 static void expire_client(struct nfs4_client
*clp
)
1157 nfsd4_client_record_remove(clp
);
1158 destroy_client(clp
);
1161 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1163 memcpy(target
->cl_verifier
.data
, source
->data
,
1164 sizeof(target
->cl_verifier
.data
));
1167 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1169 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1170 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1173 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1175 if (source
->cr_principal
) {
1176 target
->cr_principal
=
1177 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1178 if (target
->cr_principal
== NULL
)
1181 target
->cr_principal
= NULL
;
1182 target
->cr_flavor
= source
->cr_flavor
;
1183 target
->cr_uid
= source
->cr_uid
;
1184 target
->cr_gid
= source
->cr_gid
;
1185 target
->cr_group_info
= source
->cr_group_info
;
1186 get_group_info(target
->cr_group_info
);
1191 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1195 res
= o1
->len
- o2
->len
;
1198 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1201 static int same_name(const char *n1
, const char *n2
)
1203 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1207 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1209 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1213 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1215 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1218 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1222 if (g1
->ngroups
!= g2
->ngroups
)
1224 for (i
=0; i
<g1
->ngroups
; i
++)
1225 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1231 * RFC 3530 language requires clid_inuse be returned when the
1232 * "principal" associated with a requests differs from that previously
1233 * used. We use uid, gid's, and gss principal string as our best
1234 * approximation. We also don't want to allow non-gss use of a client
1235 * established using gss: in theory cr_principal should catch that
1236 * change, but in practice cr_principal can be null even in the gss case
1237 * since gssd doesn't always pass down a principal string.
1239 static bool is_gss_cred(struct svc_cred
*cr
)
1241 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1242 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1247 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1249 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1250 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1251 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1252 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1254 if (cr1
->cr_principal
== cr2
->cr_principal
)
1256 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1258 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1261 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1263 static u32 current_clientid
= 1;
1265 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1266 clp
->cl_clientid
.cl_id
= current_clientid
++;
1269 static void gen_confirm(struct nfs4_client
*clp
)
1274 verf
[0] = (__be32
)get_seconds();
1275 verf
[1] = (__be32
)i
++;
1276 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1279 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1281 struct nfs4_stid
*ret
;
1283 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1284 if (!ret
|| !ret
->sc_type
)
1289 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1291 struct nfs4_stid
*s
;
1293 s
= find_stateid(cl
, t
);
1296 if (typemask
& s
->sc_type
)
1301 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1302 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1304 struct nfs4_client
*clp
;
1305 struct sockaddr
*sa
= svc_addr(rqstp
);
1307 struct net
*net
= SVC_NET(rqstp
);
1308 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1310 clp
= alloc_client(name
);
1314 INIT_LIST_HEAD(&clp
->cl_sessions
);
1315 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1317 spin_lock(&nn
->client_lock
);
1319 spin_unlock(&nn
->client_lock
);
1322 idr_init(&clp
->cl_stateids
);
1323 atomic_set(&clp
->cl_refcount
, 0);
1324 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1325 INIT_LIST_HEAD(&clp
->cl_idhash
);
1326 INIT_LIST_HEAD(&clp
->cl_openowners
);
1327 INIT_LIST_HEAD(&clp
->cl_delegations
);
1328 INIT_LIST_HEAD(&clp
->cl_lru
);
1329 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1330 spin_lock_init(&clp
->cl_lock
);
1331 nfsd4_init_callback(&clp
->cl_cb_null
);
1332 clp
->cl_time
= get_seconds();
1333 clear_bit(0, &clp
->cl_cb_slot_busy
);
1334 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1335 copy_verf(clp
, verf
);
1336 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1338 clp
->cl_cb_session
= NULL
;
1344 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1346 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1347 struct nfs4_client
*clp
;
1350 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1353 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1354 new = &((*new)->rb_left
);
1356 new = &((*new)->rb_right
);
1359 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1360 rb_insert_color(&new_clp
->cl_namenode
, root
);
1363 static struct nfs4_client
*
1364 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1367 struct rb_node
*node
= root
->rb_node
;
1368 struct nfs4_client
*clp
;
1371 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1372 cmp
= compare_blob(&clp
->cl_name
, name
);
1374 node
= node
->rb_left
;
1376 node
= node
->rb_right
;
1384 add_to_unconfirmed(struct nfs4_client
*clp
)
1386 unsigned int idhashval
;
1387 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1389 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1390 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1391 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1392 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1397 move_to_confirmed(struct nfs4_client
*clp
)
1399 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1400 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1402 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1403 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1404 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1405 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1406 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1410 static struct nfs4_client
*
1411 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1413 struct nfs4_client
*clp
;
1414 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1416 list_for_each_entry(clp
, &nn
->conf_id_hashtbl
[idhashval
], cl_idhash
) {
1417 if (same_clid(&clp
->cl_clientid
, clid
)) {
1418 if ((bool)clp
->cl_minorversion
!= sessions
)
1427 static struct nfs4_client
*
1428 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1430 struct nfs4_client
*clp
;
1431 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1433 list_for_each_entry(clp
, &nn
->unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1434 if (same_clid(&clp
->cl_clientid
, clid
)) {
1435 if ((bool)clp
->cl_minorversion
!= sessions
)
1443 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1445 return clp
->cl_exchange_flags
!= 0;
1448 static struct nfs4_client
*
1449 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1451 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1454 static struct nfs4_client
*
1455 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1457 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1461 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1463 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1464 struct sockaddr
*sa
= svc_addr(rqstp
);
1465 u32 scopeid
= rpc_get_scope_id(sa
);
1466 unsigned short expected_family
;
1468 /* Currently, we only support tcp and tcp6 for the callback channel */
1469 if (se
->se_callback_netid_len
== 3 &&
1470 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1471 expected_family
= AF_INET
;
1472 else if (se
->se_callback_netid_len
== 4 &&
1473 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1474 expected_family
= AF_INET6
;
1478 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1479 se
->se_callback_addr_len
,
1480 (struct sockaddr
*)&conn
->cb_addr
,
1481 sizeof(conn
->cb_addr
));
1483 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1486 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1487 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1489 conn
->cb_prog
= se
->se_callback_prog
;
1490 conn
->cb_ident
= se
->se_callback_ident
;
1491 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1494 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1495 conn
->cb_addrlen
= 0;
1496 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1497 "will not receive delegations\n",
1498 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1504 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1507 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1509 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1512 dprintk("--> %s slot %p\n", __func__
, slot
);
1514 slot
->sl_opcnt
= resp
->opcnt
;
1515 slot
->sl_status
= resp
->cstate
.status
;
1517 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1518 if (nfsd4_not_cached(resp
)) {
1519 slot
->sl_datalen
= 0;
1522 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1523 base
= (char *)resp
->cstate
.datap
-
1524 (char *)resp
->xbuf
->head
[0].iov_base
;
1525 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1527 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1532 * Encode the replay sequence operation from the slot values.
1533 * If cachethis is FALSE encode the uncached rep error on the next
1534 * operation which sets resp->p and increments resp->opcnt for
1535 * nfs4svc_encode_compoundres.
1539 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1540 struct nfsd4_compoundres
*resp
)
1542 struct nfsd4_op
*op
;
1543 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1545 /* Encode the replayed sequence operation */
1546 op
= &args
->ops
[resp
->opcnt
- 1];
1547 nfsd4_encode_operation(resp
, op
);
1549 /* Return nfserr_retry_uncached_rep in next operation. */
1550 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1551 op
= &args
->ops
[resp
->opcnt
++];
1552 op
->status
= nfserr_retry_uncached_rep
;
1553 nfsd4_encode_operation(resp
, op
);
1559 * The sequence operation is not cached because we can use the slot and
1563 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1564 struct nfsd4_sequence
*seq
)
1566 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1569 dprintk("--> %s slot %p\n", __func__
, slot
);
1571 /* Either returns 0 or nfserr_retry_uncached */
1572 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1573 if (status
== nfserr_retry_uncached_rep
)
1576 /* The sequence operation has been encoded, cstate->datap set. */
1577 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1579 resp
->opcnt
= slot
->sl_opcnt
;
1580 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1581 status
= slot
->sl_status
;
1587 * Set the exchange_id flags returned by the server.
1590 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1592 /* pNFS is not supported */
1593 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1595 /* Referrals are supported, Migration is not. */
1596 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1598 /* set the wire flags to return to client. */
1599 clid
->flags
= new->cl_exchange_flags
;
1602 static bool client_has_state(struct nfs4_client
*clp
)
1605 * Note clp->cl_openowners check isn't quite right: there's no
1606 * need to count owners without stateid's.
1608 * Also note we should probably be using this in 4.0 case too.
1610 return !list_empty(&clp
->cl_openowners
)
1611 || !list_empty(&clp
->cl_delegations
)
1612 || !list_empty(&clp
->cl_sessions
);
1616 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1617 struct nfsd4_compound_state
*cstate
,
1618 struct nfsd4_exchange_id
*exid
)
1620 struct nfs4_client
*unconf
, *conf
, *new;
1622 char addr_str
[INET6_ADDRSTRLEN
];
1623 nfs4_verifier verf
= exid
->verifier
;
1624 struct sockaddr
*sa
= svc_addr(rqstp
);
1625 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1626 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1628 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1629 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1630 "ip_addr=%s flags %x, spa_how %d\n",
1631 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1632 addr_str
, exid
->flags
, exid
->spa_how
);
1634 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1635 return nfserr_inval
;
1637 /* Currently only support SP4_NONE */
1638 switch (exid
->spa_how
) {
1641 default: /* checked by xdr code */
1645 return nfserr_serverfault
; /* no excuse :-/ */
1648 /* Cases below refer to rfc 5661 section 18.35.4: */
1650 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1652 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1653 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1656 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1657 status
= nfserr_inval
;
1660 if (!creds_match
) { /* case 9 */
1661 status
= nfserr_perm
;
1664 if (!verfs_match
) { /* case 8 */
1665 status
= nfserr_not_same
;
1669 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1673 if (!creds_match
) { /* case 3 */
1674 if (client_has_state(conf
)) {
1675 status
= nfserr_clid_inuse
;
1678 expire_client(conf
);
1681 if (verfs_match
) { /* case 2 */
1682 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1686 /* case 5, client reboot */
1690 if (update
) { /* case 7 */
1691 status
= nfserr_noent
;
1695 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1696 if (unconf
) /* case 4, possible retry or client restart */
1697 expire_client(unconf
);
1699 /* case 1 (normal case) */
1701 new = create_client(exid
->clname
, rqstp
, &verf
);
1703 status
= nfserr_jukebox
;
1706 new->cl_minorversion
= 1;
1709 add_to_unconfirmed(new);
1711 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1712 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1714 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1715 nfsd4_set_ex_flags(new, exid
);
1717 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1718 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1722 nfs4_unlock_state();
1727 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1729 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1732 /* The slot is in use, and no response has been sent. */
1734 if (seqid
== slot_seqid
)
1735 return nfserr_jukebox
;
1737 return nfserr_seq_misordered
;
1739 /* Note unsigned 32-bit arithmetic handles wraparound: */
1740 if (likely(seqid
== slot_seqid
+ 1))
1742 if (seqid
== slot_seqid
)
1743 return nfserr_replay_cache
;
1744 return nfserr_seq_misordered
;
1748 * Cache the create session result into the create session single DRC
1749 * slot cache by saving the xdr structure. sl_seqid has been set.
1750 * Do this for solo or embedded create session operations.
1753 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1754 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1756 slot
->sl_status
= nfserr
;
1757 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1761 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1762 struct nfsd4_clid_slot
*slot
)
1764 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1765 return slot
->sl_status
;
1768 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1769 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1770 1 + /* MIN tag is length with zero, only length */ \
1771 3 + /* version, opcount, opcode */ \
1772 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1773 /* seqid, slotID, slotID, cache */ \
1774 4 ) * sizeof(__be32))
1776 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1777 2 + /* verifier: AUTH_NULL, length 0 */\
1779 1 + /* MIN tag is length with zero, only length */ \
1780 3 + /* opcount, opcode, opstatus*/ \
1781 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1782 /* seqid, slotID, slotID, slotID, status */ \
1783 5 ) * sizeof(__be32))
1785 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1787 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1788 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1792 nfsd4_create_session(struct svc_rqst
*rqstp
,
1793 struct nfsd4_compound_state
*cstate
,
1794 struct nfsd4_create_session
*cr_ses
)
1796 struct sockaddr
*sa
= svc_addr(rqstp
);
1797 struct nfs4_client
*conf
, *unconf
;
1798 struct nfsd4_session
*new;
1799 struct nfsd4_conn
*conn
;
1800 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1802 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1804 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1805 return nfserr_inval
;
1806 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1807 return nfserr_toosmall
;
1808 new = alloc_session(&cr_ses
->fore_channel
, nn
);
1810 return nfserr_jukebox
;
1811 status
= nfserr_jukebox
;
1812 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1814 goto out_free_session
;
1817 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1818 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1821 cs_slot
= &conf
->cl_cs_slot
;
1822 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1823 if (status
== nfserr_replay_cache
) {
1824 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1826 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1827 status
= nfserr_seq_misordered
;
1830 } else if (unconf
) {
1831 struct nfs4_client
*old
;
1832 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1833 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1834 status
= nfserr_clid_inuse
;
1837 cs_slot
= &unconf
->cl_cs_slot
;
1838 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1840 /* an unconfirmed replay returns misordered */
1841 status
= nfserr_seq_misordered
;
1844 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1847 move_to_confirmed(unconf
);
1850 status
= nfserr_stale_clientid
;
1855 * We do not support RDMA or persistent sessions
1857 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1858 cr_ses
->flags
&= ~SESSION4_RDMA
;
1860 init_session(rqstp
, new, conf
, cr_ses
);
1861 nfsd4_init_conn(rqstp
, conn
, new);
1863 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1864 NFS4_MAX_SESSIONID_LEN
);
1865 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1866 sizeof(struct nfsd4_channel_attrs
));
1867 cs_slot
->sl_seqid
++;
1868 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1870 /* cache solo and embedded create sessions under the state lock */
1871 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1872 nfs4_unlock_state();
1874 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1877 nfs4_unlock_state();
1880 __free_session(new);
1884 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1887 case NFS4_CDFC4_FORE
:
1888 case NFS4_CDFC4_BACK
:
1890 case NFS4_CDFC4_FORE_OR_BOTH
:
1891 case NFS4_CDFC4_BACK_OR_BOTH
:
1892 *dir
= NFS4_CDFC4_BOTH
;
1895 return nfserr_inval
;
1898 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1900 struct nfsd4_session
*session
= cstate
->session
;
1901 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1903 spin_lock(&nn
->client_lock
);
1904 session
->se_cb_prog
= bc
->bc_cb_program
;
1905 session
->se_cb_sec
= bc
->bc_cb_sec
;
1906 spin_unlock(&nn
->client_lock
);
1908 nfsd4_probe_callback(session
->se_client
);
1913 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1914 struct nfsd4_compound_state
*cstate
,
1915 struct nfsd4_bind_conn_to_session
*bcts
)
1918 struct nfsd4_conn
*conn
;
1919 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1921 if (!nfsd4_last_compound_op(rqstp
))
1922 return nfserr_not_only_op
;
1923 spin_lock(&nn
->client_lock
);
1924 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1925 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1926 * client_lock iself: */
1927 if (cstate
->session
) {
1928 nfsd4_get_session(cstate
->session
);
1929 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1931 spin_unlock(&nn
->client_lock
);
1932 if (!cstate
->session
)
1933 return nfserr_badsession
;
1935 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1938 conn
= alloc_conn(rqstp
, bcts
->dir
);
1940 return nfserr_jukebox
;
1941 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1945 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1949 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1953 nfsd4_destroy_session(struct svc_rqst
*r
,
1954 struct nfsd4_compound_state
*cstate
,
1955 struct nfsd4_destroy_session
*sessionid
)
1957 struct nfsd4_session
*ses
;
1958 __be32 status
= nfserr_badsession
;
1959 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
1962 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1963 * - Should we return nfserr_back_chan_busy if waiting for
1964 * callbacks on to-be-destroyed session?
1965 * - Do we need to clear any callback info from previous session?
1968 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1969 if (!nfsd4_last_compound_op(r
))
1970 return nfserr_not_only_op
;
1972 dump_sessionid(__func__
, &sessionid
->sessionid
);
1973 spin_lock(&nn
->client_lock
);
1974 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
1976 spin_unlock(&nn
->client_lock
);
1980 unhash_session(ses
);
1981 spin_unlock(&nn
->client_lock
);
1984 nfsd4_probe_callback_sync(ses
->se_client
);
1985 nfs4_unlock_state();
1987 spin_lock(&nn
->client_lock
);
1988 nfsd4_del_conns(ses
);
1989 nfsd4_put_session_locked(ses
);
1990 spin_unlock(&nn
->client_lock
);
1993 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1997 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1999 struct nfsd4_conn
*c
;
2001 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2002 if (c
->cn_xprt
== xpt
) {
2009 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2011 struct nfs4_client
*clp
= ses
->se_client
;
2012 struct nfsd4_conn
*c
;
2015 spin_lock(&clp
->cl_lock
);
2016 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2018 spin_unlock(&clp
->cl_lock
);
2022 __nfsd4_hash_conn(new, ses
);
2023 spin_unlock(&clp
->cl_lock
);
2024 ret
= nfsd4_register_conn(new);
2026 /* oops; xprt is already down: */
2027 nfsd4_conn_lost(&new->cn_xpt_user
);
2031 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2033 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2035 return args
->opcnt
> session
->se_fchannel
.maxops
;
2038 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2039 struct nfsd4_session
*session
)
2041 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2043 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2047 nfsd4_sequence(struct svc_rqst
*rqstp
,
2048 struct nfsd4_compound_state
*cstate
,
2049 struct nfsd4_sequence
*seq
)
2051 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2052 struct nfsd4_session
*session
;
2053 struct nfsd4_slot
*slot
;
2054 struct nfsd4_conn
*conn
;
2056 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2058 if (resp
->opcnt
!= 1)
2059 return nfserr_sequence_pos
;
2062 * Will be either used or freed by nfsd4_sequence_check_conn
2065 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2067 return nfserr_jukebox
;
2069 spin_lock(&nn
->client_lock
);
2070 status
= nfserr_badsession
;
2071 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2075 status
= nfserr_too_many_ops
;
2076 if (nfsd4_session_too_many_ops(rqstp
, session
))
2079 status
= nfserr_req_too_big
;
2080 if (nfsd4_request_too_big(rqstp
, session
))
2083 status
= nfserr_badslot
;
2084 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2087 slot
= session
->se_slots
[seq
->slotid
];
2088 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2090 /* We do not negotiate the number of slots yet, so set the
2091 * maxslots to the session maxreqs which is used to encode
2092 * sr_highest_slotid and the sr_target_slot id to maxslots */
2093 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2095 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2096 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2097 if (status
== nfserr_replay_cache
) {
2098 status
= nfserr_seq_misordered
;
2099 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2101 cstate
->slot
= slot
;
2102 cstate
->session
= session
;
2103 /* Return the cached reply status and set cstate->status
2104 * for nfsd4_proc_compound processing */
2105 status
= nfsd4_replay_cache_entry(resp
, seq
);
2106 cstate
->status
= nfserr_replay_cache
;
2112 nfsd4_sequence_check_conn(conn
, session
);
2115 /* Success! bump slot seqid */
2116 slot
->sl_seqid
= seq
->seqid
;
2117 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2119 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2121 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2123 cstate
->slot
= slot
;
2124 cstate
->session
= session
;
2127 /* Hold a session reference until done processing the compound. */
2128 if (cstate
->session
) {
2129 struct nfs4_client
*clp
= session
->se_client
;
2131 nfsd4_get_session(cstate
->session
);
2132 atomic_inc(&clp
->cl_refcount
);
2133 switch (clp
->cl_cb_state
) {
2135 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2137 case NFSD4_CB_FAULT
:
2138 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2141 seq
->status_flags
= 0;
2145 spin_unlock(&nn
->client_lock
);
2146 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2151 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2153 struct nfs4_client
*conf
, *unconf
, *clp
;
2155 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2158 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2159 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2164 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2165 status
= nfserr_clientid_busy
;
2169 /* rfc5661 18.50.3 */
2170 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2171 status
= nfserr_clientid_busy
;
2177 status
= nfserr_stale_clientid
;
2183 nfs4_unlock_state();
2184 dprintk("%s return %d\n", __func__
, ntohl(status
));
2189 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2193 if (rc
->rca_one_fs
) {
2194 if (!cstate
->current_fh
.fh_dentry
)
2195 return nfserr_nofilehandle
;
2197 * We don't take advantage of the rca_one_fs case.
2198 * That's OK, it's optional, we can safely ignore it.
2204 status
= nfserr_complete_already
;
2205 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2206 &cstate
->session
->se_client
->cl_flags
))
2209 status
= nfserr_stale_clientid
;
2210 if (is_client_expired(cstate
->session
->se_client
))
2212 * The following error isn't really legal.
2213 * But we only get here if the client just explicitly
2214 * destroyed the client. Surely it no longer cares what
2215 * error it gets back on an operation for the dead
2221 nfsd4_client_record_create(cstate
->session
->se_client
);
2223 nfs4_unlock_state();
2228 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2229 struct nfsd4_setclientid
*setclid
)
2231 struct xdr_netobj clname
= setclid
->se_name
;
2232 nfs4_verifier clverifier
= setclid
->se_verf
;
2233 struct nfs4_client
*conf
, *unconf
, *new;
2235 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2237 /* Cases below refer to rfc 3530 section 14.2.33: */
2239 conf
= find_confirmed_client_by_name(&clname
, nn
);
2242 status
= nfserr_clid_inuse
;
2243 if (clp_used_exchangeid(conf
))
2245 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2246 char addr_str
[INET6_ADDRSTRLEN
];
2247 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2249 dprintk("NFSD: setclientid: string in use by client "
2250 "at %s\n", addr_str
);
2254 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2256 expire_client(unconf
);
2257 status
= nfserr_jukebox
;
2258 new = create_client(clname
, rqstp
, &clverifier
);
2261 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2262 /* case 1: probable callback update */
2263 copy_clid(new, conf
);
2264 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2266 new->cl_minorversion
= 0;
2267 gen_callback(new, setclid
, rqstp
);
2268 add_to_unconfirmed(new);
2269 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2270 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2271 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2274 nfs4_unlock_state();
2280 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2281 struct nfsd4_compound_state
*cstate
,
2282 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2284 struct nfs4_client
*conf
, *unconf
;
2285 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2286 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2288 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2290 if (STALE_CLIENTID(clid
, nn
))
2291 return nfserr_stale_clientid
;
2294 conf
= find_confirmed_client(clid
, false, nn
);
2295 unconf
= find_unconfirmed_client(clid
, false, nn
);
2297 * We try hard to give out unique clientid's, so if we get an
2298 * attempt to confirm the same clientid with a different cred,
2299 * there's a bug somewhere. Let's charitably assume it's our
2302 status
= nfserr_serverfault
;
2303 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2305 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2307 /* cases below refer to rfc 3530 section 14.2.34: */
2308 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2309 if (conf
&& !unconf
) /* case 2: probable retransmit */
2311 else /* case 4: client hasn't noticed we rebooted yet? */
2312 status
= nfserr_stale_clientid
;
2316 if (conf
) { /* case 1: callback update */
2317 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2318 nfsd4_probe_callback(conf
);
2319 expire_client(unconf
);
2320 } else { /* case 3: normal case; new or rebooted client */
2321 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2323 expire_client(conf
);
2324 move_to_confirmed(unconf
);
2325 nfsd4_probe_callback(unconf
);
2328 nfs4_unlock_state();
2332 static struct nfs4_file
*nfsd4_alloc_file(void)
2334 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2337 /* OPEN Share state helper functions */
2338 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2340 unsigned int hashval
= file_hashval(ino
);
2342 atomic_set(&fp
->fi_ref
, 1);
2343 INIT_LIST_HEAD(&fp
->fi_hash
);
2344 INIT_LIST_HEAD(&fp
->fi_stateids
);
2345 INIT_LIST_HEAD(&fp
->fi_delegations
);
2346 fp
->fi_inode
= igrab(ino
);
2347 fp
->fi_had_conflict
= false;
2348 fp
->fi_lease
= NULL
;
2349 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2350 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2351 spin_lock(&recall_lock
);
2352 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2353 spin_unlock(&recall_lock
);
2357 nfsd4_free_slab(struct kmem_cache
**slab
)
2361 kmem_cache_destroy(*slab
);
2366 nfsd4_free_slabs(void)
2368 nfsd4_free_slab(&openowner_slab
);
2369 nfsd4_free_slab(&lockowner_slab
);
2370 nfsd4_free_slab(&file_slab
);
2371 nfsd4_free_slab(&stateid_slab
);
2372 nfsd4_free_slab(&deleg_slab
);
2376 nfsd4_init_slabs(void)
2378 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2379 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2380 if (openowner_slab
== NULL
)
2382 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2383 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2384 if (lockowner_slab
== NULL
)
2386 file_slab
= kmem_cache_create("nfsd4_files",
2387 sizeof(struct nfs4_file
), 0, 0, NULL
);
2388 if (file_slab
== NULL
)
2390 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2391 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2392 if (stateid_slab
== NULL
)
2394 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2395 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2396 if (deleg_slab
== NULL
)
2401 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2405 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2407 kfree(oo
->oo_owner
.so_owner
.data
);
2408 kmem_cache_free(openowner_slab
, oo
);
2411 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2413 kfree(lo
->lo_owner
.so_owner
.data
);
2414 kmem_cache_free(lockowner_slab
, lo
);
2417 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2419 rp
->rp_status
= nfserr_serverfault
;
2421 rp
->rp_buf
= rp
->rp_ibuf
;
2424 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2426 struct nfs4_stateowner
*sop
;
2428 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2432 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2433 if (!sop
->so_owner
.data
) {
2434 kmem_cache_free(slab
, sop
);
2437 sop
->so_owner
.len
= owner
->len
;
2439 INIT_LIST_HEAD(&sop
->so_stateids
);
2440 sop
->so_client
= clp
;
2441 init_nfs4_replay(&sop
->so_replay
);
2445 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2447 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2449 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2450 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2453 static struct nfs4_openowner
*
2454 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2455 struct nfs4_openowner
*oo
;
2457 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2460 oo
->oo_owner
.so_is_open_owner
= 1;
2461 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2462 oo
->oo_flags
= NFS4_OO_NEW
;
2464 oo
->oo_last_closed_stid
= NULL
;
2465 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2466 hash_openowner(oo
, clp
, strhashval
);
2470 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2471 struct nfs4_openowner
*oo
= open
->op_openowner
;
2473 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2474 INIT_LIST_HEAD(&stp
->st_lockowners
);
2475 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2476 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2477 stp
->st_stateowner
= &oo
->oo_owner
;
2480 stp
->st_access_bmap
= 0;
2481 stp
->st_deny_bmap
= 0;
2482 set_access(open
->op_share_access
, stp
);
2483 set_deny(open
->op_share_deny
, stp
);
2484 stp
->st_openstp
= NULL
;
2488 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2490 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2492 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2494 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2495 oo
->oo_time
= get_seconds();
2499 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2502 return (sop
->so_owner
.len
== owner
->len
) &&
2503 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2504 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2507 static struct nfs4_openowner
*
2508 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2509 bool sessions
, struct nfsd_net
*nn
)
2511 struct nfs4_stateowner
*so
;
2512 struct nfs4_openowner
*oo
;
2513 struct nfs4_client
*clp
;
2515 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2516 if (!so
->so_is_open_owner
)
2518 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2520 clp
= oo
->oo_owner
.so_client
;
2521 if ((bool)clp
->cl_minorversion
!= sessions
)
2523 renew_client(oo
->oo_owner
.so_client
);
2530 /* search file_hashtbl[] for file */
2531 static struct nfs4_file
*
2532 find_file(struct inode
*ino
)
2534 unsigned int hashval
= file_hashval(ino
);
2535 struct nfs4_file
*fp
;
2537 spin_lock(&recall_lock
);
2538 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2539 if (fp
->fi_inode
== ino
) {
2541 spin_unlock(&recall_lock
);
2545 spin_unlock(&recall_lock
);
2550 * Called to check deny when READ with all zero stateid or
2551 * WRITE with all zero or all one stateid
2554 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2556 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2557 struct nfs4_file
*fp
;
2558 struct nfs4_ol_stateid
*stp
;
2561 dprintk("NFSD: nfs4_share_conflict\n");
2563 fp
= find_file(ino
);
2566 ret
= nfserr_locked
;
2567 /* Search for conflicting share reservations */
2568 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2569 if (test_deny(deny_type
, stp
) ||
2570 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2579 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2581 /* We're assuming the state code never drops its reference
2582 * without first removing the lease. Since we're in this lease
2583 * callback (and since the lease code is serialized by the kernel
2584 * lock) we know the server hasn't removed the lease yet, we know
2585 * it's safe to take a reference: */
2586 atomic_inc(&dp
->dl_count
);
2588 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2590 /* only place dl_time is set. protected by lock_flocks*/
2591 dp
->dl_time
= get_seconds();
2593 nfsd4_cb_recall(dp
);
2596 /* Called from break_lease() with lock_flocks() held. */
2597 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2599 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2600 struct nfs4_delegation
*dp
;
2603 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2606 if (fp
->fi_had_conflict
) {
2607 WARN(1, "duplicate break on %p\n", fp
);
2611 * We don't want the locks code to timeout the lease for us;
2612 * we'll remove it ourself if a delegation isn't returned
2615 fl
->fl_break_time
= 0;
2617 spin_lock(&recall_lock
);
2618 fp
->fi_had_conflict
= true;
2619 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2620 nfsd_break_one_deleg(dp
);
2621 spin_unlock(&recall_lock
);
2625 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2628 return lease_modify(onlist
, arg
);
2633 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2634 .lm_break
= nfsd_break_deleg_cb
,
2635 .lm_change
= nfsd_change_deleg_cb
,
2638 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2640 if (nfsd4_has_session(cstate
))
2642 if (seqid
== so
->so_seqid
- 1)
2643 return nfserr_replay_me
;
2644 if (seqid
== so
->so_seqid
)
2646 return nfserr_bad_seqid
;
2650 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2651 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2653 clientid_t
*clientid
= &open
->op_clientid
;
2654 struct nfs4_client
*clp
= NULL
;
2655 unsigned int strhashval
;
2656 struct nfs4_openowner
*oo
= NULL
;
2659 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2660 return nfserr_stale_clientid
;
2662 * In case we need it later, after we've already created the
2663 * file and don't want to risk a further failure:
2665 open
->op_file
= nfsd4_alloc_file();
2666 if (open
->op_file
== NULL
)
2667 return nfserr_jukebox
;
2669 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2670 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2671 open
->op_openowner
= oo
;
2673 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2676 return nfserr_expired
;
2679 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2680 /* Replace unconfirmed owners without checking for replay. */
2681 clp
= oo
->oo_owner
.so_client
;
2682 release_openowner(oo
);
2683 open
->op_openowner
= NULL
;
2686 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2689 clp
= oo
->oo_owner
.so_client
;
2692 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2694 return nfserr_jukebox
;
2695 open
->op_openowner
= oo
;
2697 open
->op_stp
= nfs4_alloc_stateid(clp
);
2699 return nfserr_jukebox
;
2703 static inline __be32
2704 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2706 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2707 return nfserr_openmode
;
2712 static int share_access_to_flags(u32 share_access
)
2714 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2717 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2719 struct nfs4_stid
*ret
;
2721 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2724 return delegstateid(ret
);
2727 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2729 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2730 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2734 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2735 struct nfs4_delegation
**dp
)
2738 __be32 status
= nfserr_bad_stateid
;
2740 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2743 flags
= share_access_to_flags(open
->op_share_access
);
2744 status
= nfs4_check_delegmode(*dp
, flags
);
2748 if (!nfsd4_is_deleg_cur(open
))
2752 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2757 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2759 struct nfs4_ol_stateid
*local
;
2760 struct nfs4_openowner
*oo
= open
->op_openowner
;
2762 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2763 /* ignore lock owners */
2764 if (local
->st_stateowner
->so_is_open_owner
== 0)
2766 /* remember if we have seen this open owner */
2767 if (local
->st_stateowner
== &oo
->oo_owner
)
2769 /* check for conflicting share reservations */
2770 if (!test_share(local
, open
))
2771 return nfserr_share_denied
;
2776 static inline int nfs4_access_to_access(u32 nfs4_access
)
2780 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2781 flags
|= NFSD_MAY_READ
;
2782 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2783 flags
|= NFSD_MAY_WRITE
;
2787 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2788 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2791 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2792 int access
= nfs4_access_to_access(open
->op_share_access
);
2794 if (!fp
->fi_fds
[oflag
]) {
2795 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2796 &fp
->fi_fds
[oflag
]);
2800 nfs4_file_get_access(fp
, oflag
);
2805 static inline __be32
2806 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2807 struct nfsd4_open
*open
)
2809 struct iattr iattr
= {
2810 .ia_valid
= ATTR_SIZE
,
2813 if (!open
->op_truncate
)
2815 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2816 return nfserr_inval
;
2817 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2821 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
)
2823 u32 op_share_access
= open
->op_share_access
;
2827 new_access
= !test_access(op_share_access
, stp
);
2829 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2833 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2836 int oflag
= nfs4_access_to_omode(op_share_access
);
2837 nfs4_file_put_access(fp
, oflag
);
2841 /* remember the open */
2842 set_access(op_share_access
, stp
);
2843 set_deny(open
->op_share_deny
, stp
);
2850 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2852 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2855 /* Should we give out recallable state?: */
2856 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2858 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2861 * In the sessions case, since we don't have to establish a
2862 * separate connection for callbacks, we assume it's OK
2863 * until we hear otherwise:
2865 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2868 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2870 struct file_lock
*fl
;
2872 fl
= locks_alloc_lock();
2875 locks_init_lock(fl
);
2876 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2877 fl
->fl_flags
= FL_LEASE
;
2878 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2879 fl
->fl_end
= OFFSET_MAX
;
2880 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2881 fl
->fl_pid
= current
->tgid
;
2885 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2887 struct nfs4_file
*fp
= dp
->dl_file
;
2888 struct file_lock
*fl
;
2891 fl
= nfs4_alloc_init_lease(dp
, flag
);
2894 fl
->fl_file
= find_readable_file(fp
);
2895 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2896 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2898 list_del_init(&dp
->dl_perclnt
);
2899 locks_free_lock(fl
);
2903 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2904 atomic_set(&fp
->fi_delegees
, 1);
2905 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2909 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2911 struct nfs4_file
*fp
= dp
->dl_file
;
2914 return nfs4_setlease(dp
, flag
);
2915 spin_lock(&recall_lock
);
2916 if (fp
->fi_had_conflict
) {
2917 spin_unlock(&recall_lock
);
2920 atomic_inc(&fp
->fi_delegees
);
2921 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2922 spin_unlock(&recall_lock
);
2923 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2927 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2929 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2930 if (status
== -EAGAIN
)
2931 open
->op_why_no_deleg
= WND4_CONTENTION
;
2933 open
->op_why_no_deleg
= WND4_RESOURCE
;
2934 switch (open
->op_deleg_want
) {
2935 case NFS4_SHARE_WANT_READ_DELEG
:
2936 case NFS4_SHARE_WANT_WRITE_DELEG
:
2937 case NFS4_SHARE_WANT_ANY_DELEG
:
2939 case NFS4_SHARE_WANT_CANCEL
:
2940 open
->op_why_no_deleg
= WND4_CANCELLED
;
2942 case NFS4_SHARE_WANT_NO_DELEG
:
2949 * Attempt to hand out a delegation.
2952 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2953 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2955 struct nfs4_delegation
*dp
;
2956 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2958 int status
= 0, flag
= 0;
2960 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2961 flag
= NFS4_OPEN_DELEGATE_NONE
;
2962 open
->op_recall
= 0;
2963 switch (open
->op_claim_type
) {
2964 case NFS4_OPEN_CLAIM_PREVIOUS
:
2966 open
->op_recall
= 1;
2967 flag
= open
->op_delegate_type
;
2968 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2971 case NFS4_OPEN_CLAIM_NULL
:
2972 /* Let's not give out any delegations till everyone's
2973 * had the chance to reclaim theirs.... */
2974 if (locks_in_grace(net
))
2976 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2978 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2979 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2981 flag
= NFS4_OPEN_DELEGATE_READ
;
2987 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2990 status
= nfs4_set_delegation(dp
, flag
);
2994 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2996 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2997 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2999 open
->op_delegate_type
= flag
;
3000 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
3001 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3002 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
3003 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3005 /* 4.1 client asking for a delegation? */
3006 if (open
->op_deleg_want
)
3007 nfsd4_open_deleg_none_ext(open
, status
);
3011 unhash_stid(&dp
->dl_stid
);
3012 nfs4_put_delegation(dp
);
3014 flag
= NFS4_OPEN_DELEGATE_NONE
;
3018 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3019 struct nfs4_delegation
*dp
)
3021 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3022 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3023 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3024 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3025 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3026 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3027 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3028 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3030 /* Otherwise the client must be confused wanting a delegation
3031 * it already has, therefore we don't return
3032 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3037 * called with nfs4_lock_state() held.
3040 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3042 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3043 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3044 struct nfs4_file
*fp
= NULL
;
3045 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3046 struct nfs4_ol_stateid
*stp
= NULL
;
3047 struct nfs4_delegation
*dp
= NULL
;
3051 * Lookup file; if found, lookup stateid and check open request,
3052 * and check for delegations in the process of being recalled.
3053 * If not found, create the nfs4_file struct
3055 fp
= find_file(ino
);
3057 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3059 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3063 status
= nfserr_bad_stateid
;
3064 if (nfsd4_is_deleg_cur(open
))
3066 status
= nfserr_jukebox
;
3068 open
->op_file
= NULL
;
3069 nfsd4_init_file(fp
, ino
);
3073 * OPEN the file, or upgrade an existing OPEN.
3074 * If truncate fails, the OPEN fails.
3077 /* Stateid was found, this is an OPEN upgrade */
3078 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3082 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3085 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3089 open
->op_stp
= NULL
;
3090 init_open_stateid(stp
, fp
, open
);
3092 update_stateid(&stp
->st_stid
.sc_stateid
);
3093 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3095 if (nfsd4_has_session(&resp
->cstate
)) {
3096 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3098 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3099 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3100 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3106 * Attempt to hand out a delegation. No error return, because the
3107 * OPEN succeeds even if we fail.
3109 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3113 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3114 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3116 /* 4.1 client trying to upgrade/downgrade delegation? */
3117 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3118 open
->op_deleg_want
)
3119 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3123 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3124 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3126 * To finish the open response, we just need to set the rflags.
3128 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3129 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3130 !nfsd4_has_session(&resp
->cstate
))
3131 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3136 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3138 if (open
->op_openowner
) {
3139 struct nfs4_openowner
*oo
= open
->op_openowner
;
3141 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3142 list_del_init(&oo
->oo_close_lru
);
3143 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3145 release_openowner(oo
);
3146 open
->op_openowner
= NULL
;
3148 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3152 nfsd4_free_file(open
->op_file
);
3154 free_generic_stateid(open
->op_stp
);
3157 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3159 struct nfs4_client
*found
;
3161 if (STALE_CLIENTID(clid
, nn
))
3162 return nfserr_stale_clientid
;
3163 found
= find_confirmed_client(clid
, session
, nn
);
3166 return found
? nfs_ok
: nfserr_expired
;
3170 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3173 struct nfs4_client
*clp
;
3175 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3178 dprintk("process_renew(%08x/%08x): starting\n",
3179 clid
->cl_boot
, clid
->cl_id
);
3180 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3183 status
= nfserr_cb_path_down
;
3184 if (!list_empty(&clp
->cl_delegations
)
3185 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3189 nfs4_unlock_state();
3194 nfsd4_end_grace(struct nfsd_net
*nn
)
3196 /* do nothing if grace period already ended */
3197 if (nn
->grace_ended
)
3200 dprintk("NFSD: end of grace period\n");
3201 nn
->grace_ended
= true;
3202 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3203 locks_end_grace(&nn
->nfsd4_manager
);
3205 * Now that every NFSv4 client has had the chance to recover and
3206 * to see the (possibly new, possibly shorter) lease time, we
3207 * can safely set the next grace time to the current lease time:
3209 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3213 nfs4_laundromat(struct nfsd_net
*nn
)
3215 struct nfs4_client
*clp
;
3216 struct nfs4_openowner
*oo
;
3217 struct nfs4_delegation
*dp
;
3218 struct list_head
*pos
, *next
, reaplist
;
3219 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3220 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3221 time_t u
, test_val
= nn
->nfsd4_lease
;
3225 dprintk("NFSD: laundromat service - starting\n");
3226 nfsd4_end_grace(nn
);
3227 INIT_LIST_HEAD(&reaplist
);
3228 spin_lock(&nn
->client_lock
);
3229 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3230 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3231 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3232 t
= clp
->cl_time
- cutoff
;
3233 if (clientid_val
> t
)
3237 if (atomic_read(&clp
->cl_refcount
)) {
3238 dprintk("NFSD: client in use (clientid %08x)\n",
3239 clp
->cl_clientid
.cl_id
);
3242 unhash_client_locked(clp
);
3243 list_add(&clp
->cl_lru
, &reaplist
);
3245 spin_unlock(&nn
->client_lock
);
3246 list_for_each_safe(pos
, next
, &reaplist
) {
3247 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3248 dprintk("NFSD: purging unused client (clientid %08x)\n",
3249 clp
->cl_clientid
.cl_id
);
3252 spin_lock(&recall_lock
);
3253 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3254 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3255 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3257 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3258 u
= dp
->dl_time
- cutoff
;
3263 list_move(&dp
->dl_recall_lru
, &reaplist
);
3265 spin_unlock(&recall_lock
);
3266 list_for_each_safe(pos
, next
, &reaplist
) {
3267 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3268 unhash_delegation(dp
);
3270 test_val
= nn
->nfsd4_lease
;
3271 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3272 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3273 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3274 u
= oo
->oo_time
- cutoff
;
3279 release_openowner(oo
);
3281 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3282 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3283 nfs4_unlock_state();
3284 return clientid_val
;
3287 static struct workqueue_struct
*laundry_wq
;
3288 static void laundromat_main(struct work_struct
*);
3291 laundromat_main(struct work_struct
*laundry
)
3294 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3296 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3299 t
= nfs4_laundromat(nn
);
3300 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3301 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3304 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3306 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3307 return nfserr_bad_stateid
;
3312 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3314 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3316 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3317 STATEID_VAL(stateid
));
3322 access_permit_read(struct nfs4_ol_stateid
*stp
)
3324 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3325 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3326 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3330 access_permit_write(struct nfs4_ol_stateid
*stp
)
3332 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3333 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3337 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3339 __be32 status
= nfserr_openmode
;
3341 /* For lock stateid's, we test the parent open, not the lock: */
3342 if (stp
->st_openstp
)
3343 stp
= stp
->st_openstp
;
3344 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3346 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3353 static inline __be32
3354 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3356 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3358 else if (locks_in_grace(net
)) {
3359 /* Answer in remaining cases depends on existence of
3360 * conflicting state; so we must wait out the grace period. */
3361 return nfserr_grace
;
3362 } else if (flags
& WR_STATE
)
3363 return nfs4_share_conflict(current_fh
,
3364 NFS4_SHARE_DENY_WRITE
);
3365 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3366 return nfs4_share_conflict(current_fh
,
3367 NFS4_SHARE_DENY_READ
);
3371 * Allow READ/WRITE during grace period on recovered state only for files
3372 * that are not able to provide mandatory locking.
3375 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3377 return locks_in_grace(net
) && mandatory_lock(inode
);
3380 /* Returns true iff a is later than b: */
3381 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3383 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3386 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3389 * When sessions are used the stateid generation number is ignored
3392 if (has_session
&& in
->si_generation
== 0)
3395 if (in
->si_generation
== ref
->si_generation
)
3398 /* If the client sends us a stateid from the future, it's buggy: */
3399 if (stateid_generation_after(in
, ref
))
3400 return nfserr_bad_stateid
;
3402 * However, we could see a stateid from the past, even from a
3403 * non-buggy client. For example, if the client sends a lock
3404 * while some IO is outstanding, the lock may bump si_generation
3405 * while the IO is still in flight. The client could avoid that
3406 * situation by waiting for responses on all the IO requests,
3407 * but better performance may result in retrying IO that
3408 * receives an old_stateid error if requests are rarely
3409 * reordered in flight:
3411 return nfserr_old_stateid
;
3414 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3416 struct nfs4_stid
*s
;
3417 struct nfs4_ol_stateid
*ols
;
3420 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3421 return nfserr_bad_stateid
;
3422 /* Client debugging aid. */
3423 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3424 char addr_str
[INET6_ADDRSTRLEN
];
3425 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3427 pr_warn_ratelimited("NFSD: client %s testing state ID "
3428 "with incorrect client ID\n", addr_str
);
3429 return nfserr_bad_stateid
;
3431 s
= find_stateid(cl
, stateid
);
3433 return nfserr_bad_stateid
;
3434 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3437 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3439 ols
= openlockstateid(s
);
3440 if (ols
->st_stateowner
->so_is_open_owner
3441 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3442 return nfserr_bad_stateid
;
3446 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3447 struct nfs4_stid
**s
, bool sessions
,
3448 struct nfsd_net
*nn
)
3450 struct nfs4_client
*cl
;
3452 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3453 return nfserr_bad_stateid
;
3454 if (STALE_STATEID(stateid
, nn
))
3455 return nfserr_stale_stateid
;
3456 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
, sessions
, nn
);
3458 return nfserr_expired
;
3459 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3461 return nfserr_bad_stateid
;
3467 * Checks for stateid operations
3470 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3471 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3473 struct nfs4_stid
*s
;
3474 struct nfs4_ol_stateid
*stp
= NULL
;
3475 struct nfs4_delegation
*dp
= NULL
;
3476 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3477 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3478 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3484 if (grace_disallows_io(net
, ino
))
3485 return nfserr_grace
;
3487 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3488 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3490 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3491 &s
, cstate
->minorversion
, nn
);
3494 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3497 switch (s
->sc_type
) {
3498 case NFS4_DELEG_STID
:
3499 dp
= delegstateid(s
);
3500 status
= nfs4_check_delegmode(dp
, flags
);
3504 *filpp
= dp
->dl_file
->fi_deleg_file
;
3507 status
= nfserr_serverfault
;
3512 case NFS4_OPEN_STID
:
3513 case NFS4_LOCK_STID
:
3514 stp
= openlockstateid(s
);
3515 status
= nfs4_check_fh(current_fh
, stp
);
3518 if (stp
->st_stateowner
->so_is_open_owner
3519 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3521 status
= nfs4_check_openmode(stp
, flags
);
3525 if (flags
& RD_STATE
)
3526 *filpp
= find_readable_file(stp
->st_file
);
3528 *filpp
= find_writeable_file(stp
->st_file
);
3532 return nfserr_bad_stateid
;
3540 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3542 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3543 return nfserr_locks_held
;
3544 release_lock_stateid(stp
);
3549 * Test if the stateid is valid
3552 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3553 struct nfsd4_test_stateid
*test_stateid
)
3555 struct nfsd4_test_stateid_id
*stateid
;
3556 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3559 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3560 stateid
->ts_id_status
=
3561 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3562 nfs4_unlock_state();
3568 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3569 struct nfsd4_free_stateid
*free_stateid
)
3571 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3572 struct nfs4_stid
*s
;
3573 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3574 __be32 ret
= nfserr_bad_stateid
;
3577 s
= find_stateid(cl
, stateid
);
3580 switch (s
->sc_type
) {
3581 case NFS4_DELEG_STID
:
3582 ret
= nfserr_locks_held
;
3584 case NFS4_OPEN_STID
:
3585 case NFS4_LOCK_STID
:
3586 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3589 if (s
->sc_type
== NFS4_LOCK_STID
)
3590 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3592 ret
= nfserr_locks_held
;
3595 ret
= nfserr_bad_stateid
;
3598 nfs4_unlock_state();
3605 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3606 RD_STATE
: WR_STATE
;
3609 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3611 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3612 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3615 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3618 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3620 * "Closed" stateid's exist *only* to return
3621 * nfserr_replay_me from the previous step.
3623 return nfserr_bad_stateid
;
3624 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3627 return nfs4_check_fh(current_fh
, stp
);
3631 * Checks for sequence id mutating operations.
3634 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3635 stateid_t
*stateid
, char typemask
,
3636 struct nfs4_ol_stateid
**stpp
,
3637 struct nfsd_net
*nn
)
3640 struct nfs4_stid
*s
;
3642 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3643 seqid
, STATEID_VAL(stateid
));
3646 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3647 cstate
->minorversion
, nn
);
3650 *stpp
= openlockstateid(s
);
3651 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3653 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3656 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3657 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3660 struct nfs4_openowner
*oo
;
3662 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3663 NFS4_OPEN_STID
, stpp
, nn
);
3666 oo
= openowner((*stpp
)->st_stateowner
);
3667 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3668 return nfserr_bad_stateid
;
3673 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3674 struct nfsd4_open_confirm
*oc
)
3677 struct nfs4_openowner
*oo
;
3678 struct nfs4_ol_stateid
*stp
;
3679 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3681 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3682 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3683 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3685 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3691 status
= nfs4_preprocess_seqid_op(cstate
,
3692 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3693 NFS4_OPEN_STID
, &stp
, nn
);
3696 oo
= openowner(stp
->st_stateowner
);
3697 status
= nfserr_bad_stateid
;
3698 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3700 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3701 update_stateid(&stp
->st_stid
.sc_stateid
);
3702 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3703 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3704 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3706 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3709 if (!cstate
->replay_owner
)
3710 nfs4_unlock_state();
3714 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3716 if (!test_access(access
, stp
))
3718 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3719 clear_access(access
, stp
);
3722 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3724 switch (to_access
) {
3725 case NFS4_SHARE_ACCESS_READ
:
3726 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3727 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3729 case NFS4_SHARE_ACCESS_WRITE
:
3730 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3731 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3733 case NFS4_SHARE_ACCESS_BOTH
:
3741 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3744 for (i
= 0; i
< 4; i
++) {
3745 if ((i
& deny
) != i
)
3751 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3752 struct nfsd4_compound_state
*cstate
,
3753 struct nfsd4_open_downgrade
*od
)
3756 struct nfs4_ol_stateid
*stp
;
3757 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3759 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3760 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3761 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3763 /* We don't yet support WANT bits: */
3764 if (od
->od_deleg_want
)
3765 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3769 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3770 &od
->od_stateid
, &stp
, nn
);
3773 status
= nfserr_inval
;
3774 if (!test_access(od
->od_share_access
, stp
)) {
3775 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3776 stp
->st_access_bmap
, od
->od_share_access
);
3779 if (!test_deny(od
->od_share_deny
, stp
)) {
3780 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3781 stp
->st_deny_bmap
, od
->od_share_deny
);
3784 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3786 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3788 update_stateid(&stp
->st_stid
.sc_stateid
);
3789 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3792 if (!cstate
->replay_owner
)
3793 nfs4_unlock_state();
3797 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3799 struct nfs4_openowner
*oo
;
3800 struct nfs4_ol_stateid
*s
;
3802 if (!so
->so_is_open_owner
)
3805 s
= oo
->oo_last_closed_stid
;
3808 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3809 /* Release the last_closed_stid on the next seqid bump: */
3810 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3813 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3814 release_last_closed_stateid(oo
);
3817 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3819 unhash_open_stateid(s
);
3820 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3824 * nfs4_unlock_state() called after encode
3827 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3828 struct nfsd4_close
*close
)
3831 struct nfs4_openowner
*oo
;
3832 struct nfs4_ol_stateid
*stp
;
3833 struct net
*net
= SVC_NET(rqstp
);
3834 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3836 dprintk("NFSD: nfsd4_close on file %.*s\n",
3837 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3838 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3841 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3843 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3847 oo
= openowner(stp
->st_stateowner
);
3849 update_stateid(&stp
->st_stid
.sc_stateid
);
3850 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3852 nfsd4_close_open_stateid(stp
);
3853 release_last_closed_stateid(oo
);
3854 oo
->oo_last_closed_stid
= stp
;
3856 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3857 if (cstate
->minorversion
) {
3858 release_openowner(oo
);
3859 cstate
->replay_owner
= NULL
;
3862 * In the 4.0 case we need to keep the owners around a
3863 * little while to handle CLOSE replay.
3865 if (list_empty(&oo
->oo_owner
.so_stateids
))
3866 move_to_close_lru(oo
, SVC_NET(rqstp
));
3870 if (!cstate
->replay_owner
)
3871 nfs4_unlock_state();
3876 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3877 struct nfsd4_delegreturn
*dr
)
3879 struct nfs4_delegation
*dp
;
3880 stateid_t
*stateid
= &dr
->dr_stateid
;
3881 struct nfs4_stid
*s
;
3883 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3885 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3889 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3890 cstate
->minorversion
, nn
);
3893 dp
= delegstateid(s
);
3894 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3898 unhash_delegation(dp
);
3900 nfs4_unlock_state();
3906 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3908 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3911 end_offset(u64 start
, u64 len
)
3916 return end
>= start
? end
: NFS4_MAX_UINT64
;
3919 /* last octet in a range */
3921 last_byte_offset(u64 start
, u64 len
)
3927 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3930 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3932 return (file_hashval(inode
) + cl_id
3933 + opaque_hashval(ownername
->data
, ownername
->len
))
3934 & LOCKOWNER_INO_HASH_MASK
;
3938 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3939 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3940 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3941 * locking, this prevents us from being completely protocol-compliant. The
3942 * real solution to this problem is to start using unsigned file offsets in
3943 * the VFS, but this is a very deep change!
3946 nfs4_transform_lock_offset(struct file_lock
*lock
)
3948 if (lock
->fl_start
< 0)
3949 lock
->fl_start
= OFFSET_MAX
;
3950 if (lock
->fl_end
< 0)
3951 lock
->fl_end
= OFFSET_MAX
;
3954 /* Hack!: For now, we're defining this just so we can use a pointer to it
3955 * as a unique cookie to identify our (NFSv4's) posix locks. */
3956 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3960 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3962 struct nfs4_lockowner
*lo
;
3964 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3965 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3966 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3967 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3968 if (!deny
->ld_owner
.data
)
3969 /* We just don't care that much */
3971 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3972 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3975 deny
->ld_owner
.len
= 0;
3976 deny
->ld_owner
.data
= NULL
;
3977 deny
->ld_clientid
.cl_boot
= 0;
3978 deny
->ld_clientid
.cl_id
= 0;
3980 deny
->ld_start
= fl
->fl_start
;
3981 deny
->ld_length
= NFS4_MAX_UINT64
;
3982 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3983 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3984 deny
->ld_type
= NFS4_READ_LT
;
3985 if (fl
->fl_type
!= F_RDLCK
)
3986 deny
->ld_type
= NFS4_WRITE_LT
;
3989 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3991 struct nfs4_ol_stateid
*lst
;
3993 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3995 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3996 struct nfs4_ol_stateid
, st_perstateowner
);
3997 return lst
->st_file
->fi_inode
== inode
;
4000 static struct nfs4_lockowner
*
4001 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4002 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4004 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4005 struct nfs4_lockowner
*lo
;
4007 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4008 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4014 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4016 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4017 unsigned int inohash
= lockowner_ino_hashval(inode
,
4018 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4019 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4021 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4022 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4023 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4027 * Alloc a lock owner structure.
4028 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4031 * strhashval = ownerstr_hashval
4034 static struct nfs4_lockowner
*
4035 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4036 struct nfs4_lockowner
*lo
;
4038 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4041 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4042 lo
->lo_owner
.so_is_open_owner
= 0;
4043 /* It is the openowner seqid that will be incremented in encode in the
4044 * case of new lockowners; so increment the lock seqid manually: */
4045 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4046 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4050 static struct nfs4_ol_stateid
*
4051 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4053 struct nfs4_ol_stateid
*stp
;
4054 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4056 stp
= nfs4_alloc_stateid(clp
);
4059 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4060 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4061 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4062 stp
->st_stateowner
= &lo
->lo_owner
;
4065 stp
->st_access_bmap
= 0;
4066 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4067 stp
->st_openstp
= open_stp
;
4072 check_lock_length(u64 offset
, u64 length
)
4074 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4075 LOFF_OVERFLOW(offset
, length
)));
4078 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4080 struct nfs4_file
*fp
= lock_stp
->st_file
;
4081 int oflag
= nfs4_access_to_omode(access
);
4083 if (test_access(access
, lock_stp
))
4085 nfs4_file_get_access(fp
, oflag
);
4086 set_access(access
, lock_stp
);
4089 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)
4091 struct nfs4_file
*fi
= ost
->st_file
;
4092 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4093 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4094 struct nfs4_lockowner
*lo
;
4095 unsigned int strhashval
;
4096 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4098 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4099 &lock
->v
.new.owner
, nn
);
4101 if (!cstate
->minorversion
)
4102 return nfserr_bad_seqid
;
4103 /* XXX: a lockowner always has exactly one stateid: */
4104 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4105 struct nfs4_ol_stateid
, st_perstateowner
);
4108 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4109 &lock
->v
.new.owner
);
4110 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4112 return nfserr_jukebox
;
4113 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4115 release_lockowner(lo
);
4116 return nfserr_jukebox
;
4126 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4127 struct nfsd4_lock
*lock
)
4129 struct nfs4_openowner
*open_sop
= NULL
;
4130 struct nfs4_lockowner
*lock_sop
= NULL
;
4131 struct nfs4_ol_stateid
*lock_stp
;
4132 struct file
*filp
= NULL
;
4133 struct file_lock
*file_lock
= NULL
;
4134 struct file_lock
*conflock
= NULL
;
4136 bool new_state
= false;
4139 struct net
*net
= SVC_NET(rqstp
);
4140 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4142 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4143 (long long) lock
->lk_offset
,
4144 (long long) lock
->lk_length
);
4146 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4147 return nfserr_inval
;
4149 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4150 S_IFREG
, NFSD_MAY_LOCK
))) {
4151 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4157 if (lock
->lk_is_new
) {
4158 struct nfs4_ol_stateid
*open_stp
= NULL
;
4160 if (nfsd4_has_session(cstate
))
4161 /* See rfc 5661 18.10.3: given clientid is ignored: */
4162 memcpy(&lock
->v
.new.clientid
,
4163 &cstate
->session
->se_client
->cl_clientid
,
4164 sizeof(clientid_t
));
4166 status
= nfserr_stale_clientid
;
4167 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4170 /* validate and update open stateid and open seqid */
4171 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4172 lock
->lk_new_open_seqid
,
4173 &lock
->lk_new_open_stateid
,
4177 open_sop
= openowner(open_stp
->st_stateowner
);
4178 status
= nfserr_bad_stateid
;
4179 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4180 &lock
->v
.new.clientid
))
4182 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4183 &lock_stp
, &new_state
);
4185 status
= nfs4_preprocess_seqid_op(cstate
,
4186 lock
->lk_old_lock_seqid
,
4187 &lock
->lk_old_lock_stateid
,
4188 NFS4_LOCK_STID
, &lock_stp
, nn
);
4191 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4193 lkflg
= setlkflg(lock
->lk_type
);
4194 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4198 status
= nfserr_grace
;
4199 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4201 status
= nfserr_no_grace
;
4202 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4205 file_lock
= locks_alloc_lock();
4207 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4208 status
= nfserr_jukebox
;
4212 locks_init_lock(file_lock
);
4213 switch (lock
->lk_type
) {
4216 filp
= find_readable_file(lock_stp
->st_file
);
4218 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4219 file_lock
->fl_type
= F_RDLCK
;
4222 case NFS4_WRITEW_LT
:
4223 filp
= find_writeable_file(lock_stp
->st_file
);
4225 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4226 file_lock
->fl_type
= F_WRLCK
;
4229 status
= nfserr_inval
;
4233 status
= nfserr_openmode
;
4236 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4237 file_lock
->fl_pid
= current
->tgid
;
4238 file_lock
->fl_file
= filp
;
4239 file_lock
->fl_flags
= FL_POSIX
;
4240 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4241 file_lock
->fl_start
= lock
->lk_offset
;
4242 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4243 nfs4_transform_lock_offset(file_lock
);
4245 conflock
= locks_alloc_lock();
4247 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4248 status
= nfserr_jukebox
;
4252 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4254 case 0: /* success! */
4255 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4256 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4260 case (EAGAIN
): /* conflock holds conflicting lock */
4261 status
= nfserr_denied
;
4262 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4263 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4266 status
= nfserr_deadlock
;
4269 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4270 status
= nfserrno(err
);
4274 if (status
&& new_state
)
4275 release_lockowner(lock_sop
);
4276 if (!cstate
->replay_owner
)
4277 nfs4_unlock_state();
4279 locks_free_lock(file_lock
);
4281 locks_free_lock(conflock
);
4286 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4287 * so we do a temporary open here just to get an open file to pass to
4288 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4291 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4294 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4296 err
= nfserrno(vfs_test_lock(file
, lock
));
4306 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4307 struct nfsd4_lockt
*lockt
)
4309 struct inode
*inode
;
4310 struct file_lock
*file_lock
= NULL
;
4311 struct nfs4_lockowner
*lo
;
4313 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4315 if (locks_in_grace(SVC_NET(rqstp
)))
4316 return nfserr_grace
;
4318 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4319 return nfserr_inval
;
4323 if (!nfsd4_has_session(cstate
)) {
4324 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4329 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4332 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4333 file_lock
= locks_alloc_lock();
4335 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4336 status
= nfserr_jukebox
;
4339 locks_init_lock(file_lock
);
4340 switch (lockt
->lt_type
) {
4343 file_lock
->fl_type
= F_RDLCK
;
4346 case NFS4_WRITEW_LT
:
4347 file_lock
->fl_type
= F_WRLCK
;
4350 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4351 status
= nfserr_inval
;
4355 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4357 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4358 file_lock
->fl_pid
= current
->tgid
;
4359 file_lock
->fl_flags
= FL_POSIX
;
4361 file_lock
->fl_start
= lockt
->lt_offset
;
4362 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4364 nfs4_transform_lock_offset(file_lock
);
4366 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4370 if (file_lock
->fl_type
!= F_UNLCK
) {
4371 status
= nfserr_denied
;
4372 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4375 nfs4_unlock_state();
4377 locks_free_lock(file_lock
);
4382 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4383 struct nfsd4_locku
*locku
)
4385 struct nfs4_ol_stateid
*stp
;
4386 struct file
*filp
= NULL
;
4387 struct file_lock
*file_lock
= NULL
;
4390 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4392 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4393 (long long) locku
->lu_offset
,
4394 (long long) locku
->lu_length
);
4396 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4397 return nfserr_inval
;
4401 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4402 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4406 filp
= find_any_file(stp
->st_file
);
4408 status
= nfserr_lock_range
;
4411 file_lock
= locks_alloc_lock();
4413 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4414 status
= nfserr_jukebox
;
4417 locks_init_lock(file_lock
);
4418 file_lock
->fl_type
= F_UNLCK
;
4419 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4420 file_lock
->fl_pid
= current
->tgid
;
4421 file_lock
->fl_file
= filp
;
4422 file_lock
->fl_flags
= FL_POSIX
;
4423 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4424 file_lock
->fl_start
= locku
->lu_offset
;
4426 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4428 nfs4_transform_lock_offset(file_lock
);
4431 * Try to unlock the file in the VFS.
4433 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4435 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4439 * OK, unlock succeeded; the only thing left to do is update the stateid.
4441 update_stateid(&stp
->st_stid
.sc_stateid
);
4442 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4445 if (!cstate
->replay_owner
)
4446 nfs4_unlock_state();
4448 locks_free_lock(file_lock
);
4452 status
= nfserrno(err
);
4458 * 1: locks held by lockowner
4459 * 0: no locks held by lockowner
4462 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4464 struct file_lock
**flpp
;
4465 struct inode
*inode
= filp
->fi_inode
;
4469 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4470 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4481 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4482 struct nfsd4_compound_state
*cstate
,
4483 struct nfsd4_release_lockowner
*rlockowner
)
4485 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4486 struct nfs4_stateowner
*sop
;
4487 struct nfs4_lockowner
*lo
;
4488 struct nfs4_ol_stateid
*stp
;
4489 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4490 struct list_head matches
;
4491 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4493 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4495 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4496 clid
->cl_boot
, clid
->cl_id
);
4500 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4504 status
= nfserr_locks_held
;
4505 INIT_LIST_HEAD(&matches
);
4507 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4508 if (sop
->so_is_open_owner
)
4510 if (!same_owner_str(sop
, owner
, clid
))
4512 list_for_each_entry(stp
, &sop
->so_stateids
,
4514 lo
= lockowner(sop
);
4515 if (check_for_locks(stp
->st_file
, lo
))
4517 list_add(&lo
->lo_list
, &matches
);
4520 /* Clients probably won't expect us to return with some (but not all)
4521 * of the lockowner state released; so don't release any until all
4522 * have been checked. */
4524 while (!list_empty(&matches
)) {
4525 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4527 /* unhash_stateowner deletes so_perclient only
4528 * for openowners. */
4529 list_del(&lo
->lo_list
);
4530 release_lockowner(lo
);
4533 nfs4_unlock_state();
4537 static inline struct nfs4_client_reclaim
*
4540 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4544 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4546 struct nfs4_client_reclaim
*crp
;
4548 crp
= nfsd4_find_reclaim_client(name
, nn
);
4549 return (crp
&& crp
->cr_clp
);
4553 * failure => all reset bets are off, nfserr_no_grace...
4555 struct nfs4_client_reclaim
*
4556 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4558 unsigned int strhashval
;
4559 struct nfs4_client_reclaim
*crp
;
4561 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4562 crp
= alloc_reclaim();
4564 strhashval
= clientstr_hashval(name
);
4565 INIT_LIST_HEAD(&crp
->cr_strhash
);
4566 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4567 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4569 nn
->reclaim_str_hashtbl_size
++;
4575 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4577 list_del(&crp
->cr_strhash
);
4579 nn
->reclaim_str_hashtbl_size
--;
4583 nfs4_release_reclaim(struct nfsd_net
*nn
)
4585 struct nfs4_client_reclaim
*crp
= NULL
;
4588 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4589 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4590 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4591 struct nfs4_client_reclaim
, cr_strhash
);
4592 nfs4_remove_reclaim_record(crp
, nn
);
4595 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4599 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4600 struct nfs4_client_reclaim
*
4601 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4603 unsigned int strhashval
;
4604 struct nfs4_client_reclaim
*crp
= NULL
;
4606 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4608 strhashval
= clientstr_hashval(recdir
);
4609 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4610 if (same_name(crp
->cr_recdir
, recdir
)) {
4618 * Called from OPEN. Look for clientid in reclaim list.
4621 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4623 struct nfs4_client
*clp
;
4625 /* find clientid in conf_id_hashtbl */
4626 clp
= find_confirmed_client(clid
, sessions
, nn
);
4628 return nfserr_reclaim_bad
;
4630 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4633 #ifdef CONFIG_NFSD_FAULT_INJECTION
4635 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4641 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4643 char buf
[INET6_ADDRSTRLEN
];
4644 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4645 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4649 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4652 char buf
[INET6_ADDRSTRLEN
];
4653 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4654 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4657 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4659 struct nfs4_openowner
*oop
;
4660 struct nfs4_lockowner
*lop
, *lo_next
;
4661 struct nfs4_ol_stateid
*stp
, *st_next
;
4664 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4665 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4666 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4678 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4680 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4683 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4685 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4686 nfsd_print_count(clp
, count
, "locked files");
4690 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4692 struct nfs4_openowner
*oop
, *next
;
4695 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4705 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4707 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4710 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4712 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4713 nfsd_print_count(clp
, count
, "open files");
4717 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4718 struct list_head
*victims
)
4720 struct nfs4_delegation
*dp
, *next
;
4723 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4725 list_move(&dp
->dl_recall_lru
, victims
);
4732 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4734 struct nfs4_delegation
*dp
, *next
;
4738 spin_lock(&recall_lock
);
4739 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4740 spin_unlock(&recall_lock
);
4742 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4743 unhash_delegation(dp
);
4748 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4750 struct nfs4_delegation
*dp
, *next
;
4754 spin_lock(&recall_lock
);
4755 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4756 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4757 nfsd_break_one_deleg(dp
);
4758 spin_unlock(&recall_lock
);
4763 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4767 spin_lock(&recall_lock
);
4768 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4769 spin_unlock(&recall_lock
);
4771 nfsd_print_count(clp
, count
, "delegations");
4775 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4777 struct nfs4_client
*clp
, *next
;
4779 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4781 if (!nfsd_netns_ready(nn
))
4784 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4785 count
+= func(clp
, max
- count
);
4786 if ((max
!= 0) && (count
>= max
))
4793 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4795 struct nfs4_client
*clp
;
4796 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4798 if (!nfsd_netns_ready(nn
))
4801 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4802 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4808 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4810 /* initialization to perform at module load time: */
4813 nfs4_state_init(void)
4817 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4818 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4820 INIT_LIST_HEAD(&del_recall_lru
);
4824 * Since the lifetime of a delegation isn't limited to that of an open, a
4825 * client may quite reasonably hang on to a delegation as long as it has
4826 * the inode cached. This becomes an obvious problem the first time a
4827 * client's inode cache approaches the size of the server's total memory.
4829 * For now we avoid this problem by imposing a hard limit on the number
4830 * of delegations, which varies according to the server's memory size.
4833 set_max_delegations(void)
4836 * Allow at most 4 delegations per megabyte of RAM. Quick
4837 * estimates suggest that in the worst case (where every delegation
4838 * is for a different inode), a delegation could take about 1.5K,
4839 * giving a worst case usage of about 6% of memory.
4841 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4844 static int nfs4_state_create_net(struct net
*net
)
4846 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4849 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4850 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4851 if (!nn
->conf_id_hashtbl
)
4853 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4854 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4855 if (!nn
->unconf_id_hashtbl
)
4857 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4858 OWNER_HASH_SIZE
, GFP_KERNEL
);
4859 if (!nn
->ownerstr_hashtbl
)
4861 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4862 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4863 if (!nn
->lockowner_ino_hashtbl
)
4864 goto err_lockowner_ino
;
4865 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4866 SESSION_HASH_SIZE
, GFP_KERNEL
);
4867 if (!nn
->sessionid_hashtbl
)
4870 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4871 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4872 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4874 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4875 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4876 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4877 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4878 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4879 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4880 nn
->conf_name_tree
= RB_ROOT
;
4881 nn
->unconf_name_tree
= RB_ROOT
;
4882 INIT_LIST_HEAD(&nn
->client_lru
);
4883 INIT_LIST_HEAD(&nn
->close_lru
);
4884 spin_lock_init(&nn
->client_lock
);
4886 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4892 kfree(nn
->lockowner_ino_hashtbl
);
4894 kfree(nn
->ownerstr_hashtbl
);
4896 kfree(nn
->unconf_id_hashtbl
);
4898 kfree(nn
->conf_id_hashtbl
);
4904 nfs4_state_destroy_net(struct net
*net
)
4907 struct nfs4_client
*clp
= NULL
;
4908 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4909 struct rb_node
*node
, *tmp
;
4911 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4912 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4913 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4914 destroy_client(clp
);
4918 node
= rb_first(&nn
->unconf_name_tree
);
4919 while (node
!= NULL
) {
4921 node
= rb_next(tmp
);
4922 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4923 rb_erase(tmp
, &nn
->unconf_name_tree
);
4924 destroy_client(clp
);
4927 kfree(nn
->sessionid_hashtbl
);
4928 kfree(nn
->lockowner_ino_hashtbl
);
4929 kfree(nn
->ownerstr_hashtbl
);
4930 kfree(nn
->unconf_id_hashtbl
);
4931 kfree(nn
->conf_id_hashtbl
);
4936 nfs4_state_start_net(struct net
*net
)
4938 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4941 ret
= nfs4_state_create_net(net
);
4944 nfsd4_client_tracking_init(net
);
4945 nn
->boot_time
= get_seconds();
4946 locks_start_grace(net
, &nn
->nfsd4_manager
);
4947 nn
->grace_ended
= false;
4948 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
4949 nn
->nfsd4_grace
, net
);
4950 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
4954 /* initialization to perform when the nfsd service is started: */
4957 nfs4_state_start(void)
4961 ret
= set_callback_cred();
4964 laundry_wq
= create_singlethread_workqueue("nfsd4");
4965 if (laundry_wq
== NULL
) {
4969 ret
= nfsd4_create_callback_queue();
4971 goto out_free_laundry
;
4973 set_max_delegations();
4978 destroy_workqueue(laundry_wq
);
4983 /* should be called with the state lock held */
4985 nfs4_state_shutdown_net(struct net
*net
)
4987 struct nfs4_delegation
*dp
= NULL
;
4988 struct list_head
*pos
, *next
, reaplist
;
4989 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4991 cancel_delayed_work_sync(&nn
->laundromat_work
);
4992 locks_end_grace(&nn
->nfsd4_manager
);
4994 INIT_LIST_HEAD(&reaplist
);
4995 spin_lock(&recall_lock
);
4996 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4997 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4998 if (dp
->dl_stid
.sc_client
->net
!= net
)
5000 list_move(&dp
->dl_recall_lru
, &reaplist
);
5002 spin_unlock(&recall_lock
);
5003 list_for_each_safe(pos
, next
, &reaplist
) {
5004 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5005 unhash_delegation(dp
);
5008 nfsd4_client_tracking_exit(net
);
5009 nfs4_state_destroy_net(net
);
5013 nfs4_state_shutdown(void)
5015 destroy_workqueue(laundry_wq
);
5016 nfsd4_destroy_callback_queue();
5020 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5022 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5023 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5027 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5029 if (cstate
->minorversion
) {
5030 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5031 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5036 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5038 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5042 * functions to set current state id
5045 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5047 put_stateid(cstate
, &odp
->od_stateid
);
5051 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5053 put_stateid(cstate
, &open
->op_stateid
);
5057 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5059 put_stateid(cstate
, &close
->cl_stateid
);
5063 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5065 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5069 * functions to consume current state id
5073 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5075 get_stateid(cstate
, &odp
->od_stateid
);
5079 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5081 get_stateid(cstate
, &drp
->dr_stateid
);
5085 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5087 get_stateid(cstate
, &fsp
->fr_stateid
);
5091 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5093 get_stateid(cstate
, &setattr
->sa_stateid
);
5097 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5099 get_stateid(cstate
, &close
->cl_stateid
);
5103 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5105 get_stateid(cstate
, &locku
->lu_stateid
);
5109 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5111 get_stateid(cstate
, &read
->rd_stateid
);
5115 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5117 get_stateid(cstate
, &write
->wr_stateid
);