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>
44 #include <linux/hash.h>
48 #include "current_stateid.h"
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 #define all_ones {{~0,~0},~0}
55 static const stateid_t one_stateid = {
57 .si_opaque = all_ones,
59 static const stateid_t zero_stateid = {
62 static const stateid_t currentstateid = {
66 static u64 current_sessionid = 1;
68 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
69 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
70 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
77 /* Currently used for almost all code touching nfsv4 state: */
78 static DEFINE_MUTEX(client_mutex);
81 * Currently used for the del_recall_lru and file hash table. In an
82 * effort to decrease the scope of the client_mutex, this spinlock may
83 * eventually cover more:
85 static DEFINE_SPINLOCK(state_lock);
87 static struct kmem_cache *openowner_slab;
88 static struct kmem_cache *lockowner_slab;
89 static struct kmem_cache *file_slab;
90 static struct kmem_cache *stateid_slab;
91 static struct kmem_cache *deleg_slab;
96 mutex_lock(&client_mutex);
99 static void free_session(struct nfsd4_session *);
101 static bool is_session_dead(struct nfsd4_session *ses)
103 return ses->se_flags & NFS4_SESSION_DEAD;
106 static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
108 if (atomic_read(&ses->se_ref) > ref_held_by_me)
109 return nfserr_jukebox;
110 ses->se_flags |= NFS4_SESSION_DEAD;
115 nfs4_unlock_state(void)
117 mutex_unlock(&client_mutex);
120 static bool is_client_expired(struct nfs4_client *clp)
122 return clp->cl_time == 0;
125 static __be32 mark_client_expired_locked(struct nfs4_client *clp)
127 if (atomic_read(&clp->cl_refcount))
128 return nfserr_jukebox;
133 static __be32 mark_client_expired(struct nfs4_client *clp)
135 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
138 spin_lock(&nn->client_lock);
139 ret = mark_client_expired_locked(clp);
140 spin_unlock(&nn->client_lock);
144 static __be32 get_client_locked(struct nfs4_client *clp)
146 if (is_client_expired(clp))
147 return nfserr_expired;
148 atomic_inc(&clp->cl_refcount);
152 /* must be called under the client_lock */
154 renew_client_locked(struct nfs4_client *clp)
156 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
158 if (is_client_expired(clp)) {
160 printk("%s: client (clientid %08x/%08x) already expired\n",
162 clp->cl_clientid.cl_boot,
163 clp->cl_clientid.cl_id);
167 dprintk("renewing client (clientid %08x/%08x)\n",
168 clp->cl_clientid.cl_boot,
169 clp->cl_clientid.cl_id);
170 list_move_tail(&clp->cl_lru, &nn->client_lru);
171 clp->cl_time = get_seconds();
175 renew_client(struct nfs4_client *clp)
177 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
179 spin_lock(&nn->client_lock);
180 renew_client_locked(clp);
181 spin_unlock(&nn->client_lock);
184 static void put_client_renew_locked(struct nfs4_client *clp)
186 if (!atomic_dec_and_test(&clp->cl_refcount))
188 if (!is_client_expired(clp))
189 renew_client_locked(clp);
192 static void put_client_renew(struct nfs4_client *clp)
194 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
196 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
198 if (!is_client_expired(clp))
199 renew_client_locked(clp);
200 spin_unlock(&nn->client_lock);
203 static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
207 if (is_session_dead(ses))
208 return nfserr_badsession;
209 status = get_client_locked(ses->se_client);
212 atomic_inc(&ses->se_ref);
216 static void nfsd4_put_session_locked(struct nfsd4_session *ses)
218 struct nfs4_client *clp = ses->se_client;
220 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
222 put_client_renew_locked(clp);
225 static void nfsd4_put_session(struct nfsd4_session *ses)
227 struct nfs4_client *clp = ses->se_client;
228 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
230 spin_lock(&nn->client_lock);
231 nfsd4_put_session_locked(ses);
232 spin_unlock(&nn->client_lock);
237 opaque_hashval(const void *ptr, int nbytes)
239 unsigned char *cptr = (unsigned char *) ptr;
249 static void nfsd4_free_file(struct nfs4_file *f)
251 kmem_cache_free(file_slab, f);
255 put_nfs4_file(struct nfs4_file *fi)
257 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
258 hlist_del(&fi->fi_hash);
259 spin_unlock(&state_lock);
266 get_nfs4_file(struct nfs4_file *fi)
268 atomic_inc(&fi->fi_ref);
272 __nfs4_get_fd(struct nfs4_file *f, int oflag)
274 if (f->fi_fds[oflag])
275 return get_file(f->fi_fds[oflag]);
280 find_writeable_file_locked(struct nfs4_file *f)
284 lockdep_assert_held(&f->fi_lock);
286 ret = __nfs4_get_fd(f, O_WRONLY);
288 ret = __nfs4_get_fd(f, O_RDWR);
293 find_writeable_file(struct nfs4_file *f)
297 spin_lock(&f->fi_lock);
298 ret = find_writeable_file_locked(f);
299 spin_unlock(&f->fi_lock);
304 static struct file *find_readable_file_locked(struct nfs4_file *f)
308 lockdep_assert_held(&f->fi_lock);
310 ret = __nfs4_get_fd(f, O_RDONLY);
312 ret = __nfs4_get_fd(f, O_RDWR);
317 find_readable_file(struct nfs4_file *f)
321 spin_lock(&f->fi_lock);
322 ret = find_readable_file_locked(f);
323 spin_unlock(&f->fi_lock);
329 find_any_file(struct nfs4_file *f)
333 spin_lock(&f->fi_lock);
334 ret = __nfs4_get_fd(f, O_RDWR);
336 ret = __nfs4_get_fd(f, O_WRONLY);
338 ret = __nfs4_get_fd(f, O_RDONLY);
340 spin_unlock(&f->fi_lock);
344 static int num_delegations;
345 unsigned long max_delegations;
348 * Open owner state (share locks)
351 /* hash tables for lock and open owners */
352 #define OWNER_HASH_BITS 8
353 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
354 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
356 static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
360 ret = opaque_hashval(ownername->data, ownername->len);
362 return ret & OWNER_HASH_MASK;
365 /* hash table for nfs4_file */
366 #define FILE_HASH_BITS 8
367 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
369 static unsigned int file_hashval(struct inode *ino)
371 /* XXX: why are we hashing on inode pointer, anyway? */
372 return hash_ptr(ino, FILE_HASH_BITS);
375 static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
378 __nfs4_file_get_access(struct nfs4_file *fp, u32 access)
380 if (access & NFS4_SHARE_ACCESS_WRITE)
381 atomic_inc(&fp->fi_access[O_WRONLY]);
382 if (access & NFS4_SHARE_ACCESS_READ)
383 atomic_inc(&fp->fi_access[O_RDONLY]);
387 nfs4_file_get_access(struct nfs4_file *fp, u32 access)
389 /* Does this access mode make sense? */
390 if (access & ~NFS4_SHARE_ACCESS_BOTH)
393 __nfs4_file_get_access(fp, access);
397 static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
399 might_lock(&fp->fi_lock);
401 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
402 struct file *f1 = NULL;
403 struct file *f2 = NULL;
405 swap(f1, fp->fi_fds[oflag]);
406 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
407 swap(f2, fp->fi_fds[O_RDWR]);
408 spin_unlock(&fp->fi_lock);
416 static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
418 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
420 if (access & NFS4_SHARE_ACCESS_WRITE)
421 __nfs4_file_put_access(fp, O_WRONLY);
422 if (access & NFS4_SHARE_ACCESS_READ)
423 __nfs4_file_put_access(fp, O_RDONLY);
426 static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
429 struct idr *stateids = &cl->cl_stateids;
430 struct nfs4_stid *stid;
433 stid = kmem_cache_alloc(slab, GFP_KERNEL);
437 new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL);
440 stid->sc_client = cl;
442 stid->sc_stateid.si_opaque.so_id = new_id;
443 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
444 /* Will be incremented before return to client: */
445 stid->sc_stateid.si_generation = 0;
448 * It shouldn't be a problem to reuse an opaque stateid value.
449 * I don't think it is for 4.1. But with 4.0 I worry that, for
450 * example, a stray write retransmission could be accepted by
451 * the server when it should have been rejected. Therefore,
452 * adopt a trick from the sctp code to attempt to maximize the
453 * amount of time until an id is reused, by ensuring they always
454 * "increase" (mod INT_MAX):
458 kmem_cache_free(slab, stid);
462 static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
464 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
468 * When we recall a delegation, we should be careful not to hand it
469 * out again straight away.
470 * To ensure this we keep a pair of bloom filters ('new' and 'old')
471 * in which the filehandles of recalled delegations are "stored".
472 * If a filehandle appear in either filter, a delegation is blocked.
473 * When a delegation is recalled, the filehandle is stored in the "new"
475 * Every 30 seconds we swap the filters and clear the "new" one,
476 * unless both are empty of course.
478 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
479 * low 3 bytes as hash-table indices.
481 * 'state_lock', which is always held when block_delegations() is called,
482 * is used to manage concurrent access. Testing does not need the lock
483 * except when swapping the two filters.
485 static struct bloom_pair {
486 int entries, old_entries;
488 int new; /* index into 'set' */
489 DECLARE_BITMAP(set[2], 256);
490 } blocked_delegations;
492 static int delegation_blocked(struct knfsd_fh *fh)
495 struct bloom_pair *bd = &blocked_delegations;
497 if (bd->entries == 0)
499 if (seconds_since_boot() - bd->swap_time > 30) {
500 spin_lock(&state_lock);
501 if (seconds_since_boot() - bd->swap_time > 30) {
502 bd->entries -= bd->old_entries;
503 bd->old_entries = bd->entries;
504 memset(bd->set[bd->new], 0,
507 bd->swap_time = seconds_since_boot();
509 spin_unlock(&state_lock);
511 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
512 if (test_bit(hash&255, bd->set[0]) &&
513 test_bit((hash>>8)&255, bd->set[0]) &&
514 test_bit((hash>>16)&255, bd->set[0]))
517 if (test_bit(hash&255, bd->set[1]) &&
518 test_bit((hash>>8)&255, bd->set[1]) &&
519 test_bit((hash>>16)&255, bd->set[1]))
525 static void block_delegations(struct knfsd_fh *fh)
528 struct bloom_pair *bd = &blocked_delegations;
530 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
532 __set_bit(hash&255, bd->set[bd->new]);
533 __set_bit((hash>>8)&255, bd->set[bd->new]);
534 __set_bit((hash>>16)&255, bd->set[bd->new]);
535 if (bd->entries == 0)
536 bd->swap_time = seconds_since_boot();
540 static struct nfs4_delegation *
541 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh)
543 struct nfs4_delegation *dp;
545 dprintk("NFSD alloc_init_deleg\n");
546 if (num_delegations > max_delegations)
548 if (delegation_blocked(¤t_fh->fh_handle))
550 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
554 * delegation seqid's are never incremented. The 4.1 special
555 * meaning of seqid 0 isn't meaningful, really, but let's avoid
556 * 0 anyway just for consistency and use 1:
558 dp->dl_stid.sc_stateid.si_generation = 1;
560 INIT_LIST_HEAD(&dp->dl_perfile);
561 INIT_LIST_HEAD(&dp->dl_perclnt);
562 INIT_LIST_HEAD(&dp->dl_recall_lru);
564 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
565 fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle);
567 atomic_set(&dp->dl_count, 1);
568 nfsd4_init_callback(&dp->dl_recall);
572 static void remove_stid(struct nfs4_stid *s)
574 struct idr *stateids = &s->sc_client->cl_stateids;
576 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
579 static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
581 kmem_cache_free(slab, s);
585 nfs4_put_delegation(struct nfs4_delegation *dp)
587 if (atomic_dec_and_test(&dp->dl_count)) {
588 nfs4_free_stid(deleg_slab, &dp->dl_stid);
593 static void nfs4_put_deleg_lease(struct nfs4_file *fp)
597 if (atomic_dec_and_test(&fp->fi_delegees)) {
598 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
600 fput(fp->fi_deleg_file);
601 fp->fi_deleg_file = NULL;
605 static void unhash_stid(struct nfs4_stid *s)
611 hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
613 lockdep_assert_held(&state_lock);
615 dp->dl_stid.sc_type = NFS4_DELEG_STID;
616 list_add(&dp->dl_perfile, &fp->fi_delegations);
617 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
620 /* Called under the state lock. */
622 unhash_delegation(struct nfs4_delegation *dp)
624 spin_lock(&state_lock);
625 list_del_init(&dp->dl_perclnt);
626 list_del_init(&dp->dl_perfile);
627 list_del_init(&dp->dl_recall_lru);
628 spin_unlock(&state_lock);
630 nfs4_put_deleg_lease(dp->dl_file);
631 put_nfs4_file(dp->dl_file);
638 static void destroy_revoked_delegation(struct nfs4_delegation *dp)
640 list_del_init(&dp->dl_recall_lru);
641 remove_stid(&dp->dl_stid);
642 nfs4_put_delegation(dp);
645 static void destroy_delegation(struct nfs4_delegation *dp)
647 unhash_delegation(dp);
648 remove_stid(&dp->dl_stid);
649 nfs4_put_delegation(dp);
652 static void revoke_delegation(struct nfs4_delegation *dp)
654 struct nfs4_client *clp = dp->dl_stid.sc_client;
656 if (clp->cl_minorversion == 0)
657 destroy_delegation(dp);
659 unhash_delegation(dp);
660 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
661 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
669 static unsigned int clientid_hashval(u32 id)
671 return id & CLIENT_HASH_MASK;
674 static unsigned int clientstr_hashval(const char *name)
676 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
680 * We store the NONE, READ, WRITE, and BOTH bits separately in the
681 * st_{access,deny}_bmap field of the stateid, in order to track not
682 * only what share bits are currently in force, but also what
683 * combinations of share bits previous opens have used. This allows us
684 * to enforce the recommendation of rfc 3530 14.2.19 that the server
685 * return an error if the client attempt to downgrade to a combination
686 * of share bits not explicable by closing some of its previous opens.
688 * XXX: This enforcement is actually incomplete, since we don't keep
689 * track of access/deny bit combinations; so, e.g., we allow:
691 * OPEN allow read, deny write
692 * OPEN allow both, deny none
693 * DOWNGRADE allow read, deny none
695 * which we should reject.
698 bmap_to_share_mode(unsigned long bmap) {
700 unsigned int access = 0;
702 for (i = 1; i < 4; i++) {
703 if (test_bit(i, &bmap))
710 test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
711 unsigned int access, deny;
713 access = bmap_to_share_mode(stp->st_access_bmap);
714 deny = bmap_to_share_mode(stp->st_deny_bmap);
715 if ((access & open->op_share_deny) || (deny & open->op_share_access))
720 /* set share access for a given stateid */
722 set_access(u32 access, struct nfs4_ol_stateid *stp)
724 unsigned char mask = 1 << access;
726 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
727 stp->st_access_bmap |= mask;
730 /* clear share access for a given stateid */
732 clear_access(u32 access, struct nfs4_ol_stateid *stp)
734 unsigned char mask = 1 << access;
736 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
737 stp->st_access_bmap &= ~mask;
740 /* test whether a given stateid has access */
742 test_access(u32 access, struct nfs4_ol_stateid *stp)
744 unsigned char mask = 1 << access;
746 return (bool)(stp->st_access_bmap & mask);
749 /* set share deny for a given stateid */
751 set_deny(u32 deny, struct nfs4_ol_stateid *stp)
753 unsigned char mask = 1 << deny;
755 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
756 stp->st_deny_bmap |= mask;
759 /* clear share deny for a given stateid */
761 clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
763 unsigned char mask = 1 << deny;
765 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
766 stp->st_deny_bmap &= ~mask;
769 /* test whether a given stateid is denying specific access */
771 test_deny(u32 deny, struct nfs4_ol_stateid *stp)
773 unsigned char mask = 1 << deny;
775 return (bool)(stp->st_deny_bmap & mask);
778 static int nfs4_access_to_omode(u32 access)
780 switch (access & NFS4_SHARE_ACCESS_BOTH) {
781 case NFS4_SHARE_ACCESS_READ:
783 case NFS4_SHARE_ACCESS_WRITE:
785 case NFS4_SHARE_ACCESS_BOTH:
792 /* release all access and file references for a given stateid */
794 release_all_access(struct nfs4_ol_stateid *stp)
798 for (i = 1; i < 4; i++) {
799 if (test_access(i, stp))
800 nfs4_file_put_access(stp->st_file, i);
801 clear_access(i, stp);
805 static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
807 struct nfs4_file *fp = stp->st_file;
809 spin_lock(&fp->fi_lock);
810 list_del(&stp->st_perfile);
811 spin_unlock(&fp->fi_lock);
812 list_del(&stp->st_perstateowner);
815 static void close_generic_stateid(struct nfs4_ol_stateid *stp)
817 release_all_access(stp);
818 put_nfs4_file(stp->st_file);
822 static void free_generic_stateid(struct nfs4_ol_stateid *stp)
824 remove_stid(&stp->st_stid);
825 nfs4_free_stid(stateid_slab, &stp->st_stid);
828 static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
832 list_del(&stp->st_locks);
833 unhash_generic_stateid(stp);
834 unhash_stid(&stp->st_stid);
835 file = find_any_file(stp->st_file);
837 filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner));
838 close_generic_stateid(stp);
839 free_generic_stateid(stp);
842 static void unhash_lockowner(struct nfs4_lockowner *lo)
844 struct nfs4_ol_stateid *stp;
846 list_del(&lo->lo_owner.so_strhash);
847 while (!list_empty(&lo->lo_owner.so_stateids)) {
848 stp = list_first_entry(&lo->lo_owner.so_stateids,
849 struct nfs4_ol_stateid, st_perstateowner);
850 __release_lock_stateid(stp);
854 static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
856 kfree(lo->lo_owner.so_owner.data);
857 kmem_cache_free(lockowner_slab, lo);
860 static void release_lockowner(struct nfs4_lockowner *lo)
862 unhash_lockowner(lo);
863 nfs4_free_lockowner(lo);
866 static void release_lockowner_if_empty(struct nfs4_lockowner *lo)
868 if (list_empty(&lo->lo_owner.so_stateids))
869 release_lockowner(lo);
872 static void release_lock_stateid(struct nfs4_ol_stateid *stp)
874 struct nfs4_lockowner *lo;
876 lo = lockowner(stp->st_stateowner);
877 __release_lock_stateid(stp);
878 release_lockowner_if_empty(lo);
881 static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp)
883 struct nfs4_ol_stateid *stp;
885 while (!list_empty(&open_stp->st_locks)) {
886 stp = list_entry(open_stp->st_locks.next,
887 struct nfs4_ol_stateid, st_locks);
888 release_lock_stateid(stp);
892 static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
894 unhash_generic_stateid(stp);
895 release_open_stateid_locks(stp);
896 close_generic_stateid(stp);
899 static void release_open_stateid(struct nfs4_ol_stateid *stp)
901 unhash_open_stateid(stp);
902 free_generic_stateid(stp);
905 static void unhash_openowner(struct nfs4_openowner *oo)
907 struct nfs4_ol_stateid *stp;
909 list_del(&oo->oo_owner.so_strhash);
910 list_del(&oo->oo_perclient);
911 while (!list_empty(&oo->oo_owner.so_stateids)) {
912 stp = list_first_entry(&oo->oo_owner.so_stateids,
913 struct nfs4_ol_stateid, st_perstateowner);
914 release_open_stateid(stp);
918 static void release_last_closed_stateid(struct nfs4_openowner *oo)
920 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
923 free_generic_stateid(s);
924 oo->oo_last_closed_stid = NULL;
928 static void nfs4_free_openowner(struct nfs4_openowner *oo)
930 kfree(oo->oo_owner.so_owner.data);
931 kmem_cache_free(openowner_slab, oo);
934 static void release_openowner(struct nfs4_openowner *oo)
936 unhash_openowner(oo);
937 list_del(&oo->oo_close_lru);
938 release_last_closed_stateid(oo);
939 nfs4_free_openowner(oo);
943 hash_sessionid(struct nfs4_sessionid *sessionid)
945 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
947 return sid->sequence % SESSION_HASH_SIZE;
952 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
954 u32 *ptr = (u32 *)(&sessionid->data[0]);
955 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
959 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
965 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
966 * won't be used for replay.
968 void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
970 struct nfs4_stateowner *so = cstate->replay_owner;
972 if (nfserr == nfserr_replay_me)
975 if (!seqid_mutating_err(ntohl(nfserr))) {
976 cstate->replay_owner = NULL;
981 if (so->so_is_open_owner)
982 release_last_closed_stateid(openowner(so));
988 gen_sessionid(struct nfsd4_session *ses)
990 struct nfs4_client *clp = ses->se_client;
991 struct nfsd4_sessionid *sid;
993 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
994 sid->clientid = clp->cl_clientid;
995 sid->sequence = current_sessionid++;
1000 * The protocol defines ca_maxresponssize_cached to include the size of
1001 * the rpc header, but all we need to cache is the data starting after
1002 * the end of the initial SEQUENCE operation--the rest we regenerate
1003 * each time. Therefore we can advertise a ca_maxresponssize_cached
1004 * value that is the number of bytes in our cache plus a few additional
1005 * bytes. In order to stay on the safe side, and not promise more than
1006 * we can cache, those additional bytes must be the minimum possible: 24
1007 * bytes of rpc header (xid through accept state, with AUTH_NULL
1008 * verifier), 12 for the compound header (with zero-length tag), and 44
1009 * for the SEQUENCE op response:
1011 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1014 free_session_slots(struct nfsd4_session *ses)
1018 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
1019 kfree(ses->se_slots[i]);
1023 * We don't actually need to cache the rpc and session headers, so we
1024 * can allocate a little less for each slot:
1026 static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1030 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1033 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1034 return size + sizeof(struct nfsd4_slot);
1038 * XXX: If we run out of reserved DRC memory we could (up to a point)
1039 * re-negotiate active sessions and reduce their slot usage to make
1040 * room for new connections. For now we just fail the create session.
1042 static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
1044 u32 slotsize = slot_bytes(ca);
1045 u32 num = ca->maxreqs;
1048 spin_lock(&nfsd_drc_lock);
1049 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1050 nfsd_drc_max_mem - nfsd_drc_mem_used);
1051 num = min_t(int, num, avail / slotsize);
1052 nfsd_drc_mem_used += num * slotsize;
1053 spin_unlock(&nfsd_drc_lock);
1058 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1060 int slotsize = slot_bytes(ca);
1062 spin_lock(&nfsd_drc_lock);
1063 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1064 spin_unlock(&nfsd_drc_lock);
1067 static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1068 struct nfsd4_channel_attrs *battrs)
1070 int numslots = fattrs->maxreqs;
1071 int slotsize = slot_bytes(fattrs);
1072 struct nfsd4_session *new;
1075 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1076 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1077 mem = numslots * sizeof(struct nfsd4_slot *);
1079 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1082 /* allocate each struct nfsd4_slot and data cache in one piece */
1083 for (i = 0; i < numslots; i++) {
1084 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1085 if (!new->se_slots[i])
1089 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1090 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1095 kfree(new->se_slots[i]);
1100 static void free_conn(struct nfsd4_conn *c)
1102 svc_xprt_put(c->cn_xprt);
1106 static void nfsd4_conn_lost(struct svc_xpt_user *u)
1108 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1109 struct nfs4_client *clp = c->cn_session->se_client;
1111 spin_lock(&clp->cl_lock);
1112 if (!list_empty(&c->cn_persession)) {
1113 list_del(&c->cn_persession);
1116 nfsd4_probe_callback(clp);
1117 spin_unlock(&clp->cl_lock);
1120 static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1122 struct nfsd4_conn *conn;
1124 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1127 svc_xprt_get(rqstp->rq_xprt);
1128 conn->cn_xprt = rqstp->rq_xprt;
1129 conn->cn_flags = flags;
1130 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1134 static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1136 conn->cn_session = ses;
1137 list_add(&conn->cn_persession, &ses->se_conns);
1140 static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1142 struct nfs4_client *clp = ses->se_client;
1144 spin_lock(&clp->cl_lock);
1145 __nfsd4_hash_conn(conn, ses);
1146 spin_unlock(&clp->cl_lock);
1149 static int nfsd4_register_conn(struct nfsd4_conn *conn)
1151 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1152 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1155 static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1159 nfsd4_hash_conn(conn, ses);
1160 ret = nfsd4_register_conn(conn);
1162 /* oops; xprt is already down: */
1163 nfsd4_conn_lost(&conn->cn_xpt_user);
1164 if (conn->cn_flags & NFS4_CDFC4_BACK) {
1165 /* callback channel may be back up */
1166 nfsd4_probe_callback(ses->se_client);
1170 static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1172 u32 dir = NFS4_CDFC4_FORE;
1174 if (cses->flags & SESSION4_BACK_CHAN)
1175 dir |= NFS4_CDFC4_BACK;
1176 return alloc_conn(rqstp, dir);
1179 /* must be called under client_lock */
1180 static void nfsd4_del_conns(struct nfsd4_session *s)
1182 struct nfs4_client *clp = s->se_client;
1183 struct nfsd4_conn *c;
1185 spin_lock(&clp->cl_lock);
1186 while (!list_empty(&s->se_conns)) {
1187 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1188 list_del_init(&c->cn_persession);
1189 spin_unlock(&clp->cl_lock);
1191 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1194 spin_lock(&clp->cl_lock);
1196 spin_unlock(&clp->cl_lock);
1199 static void __free_session(struct nfsd4_session *ses)
1201 free_session_slots(ses);
1205 static void free_session(struct nfsd4_session *ses)
1207 struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
1209 lockdep_assert_held(&nn->client_lock);
1210 nfsd4_del_conns(ses);
1211 nfsd4_put_drc_mem(&ses->se_fchannel);
1212 __free_session(ses);
1215 static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1218 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1220 new->se_client = clp;
1223 INIT_LIST_HEAD(&new->se_conns);
1225 new->se_cb_seq_nr = 1;
1226 new->se_flags = cses->flags;
1227 new->se_cb_prog = cses->callback_prog;
1228 new->se_cb_sec = cses->cb_sec;
1229 atomic_set(&new->se_ref, 0);
1230 idx = hash_sessionid(&new->se_sessionid);
1231 spin_lock(&nn->client_lock);
1232 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1233 spin_lock(&clp->cl_lock);
1234 list_add(&new->se_perclnt, &clp->cl_sessions);
1235 spin_unlock(&clp->cl_lock);
1236 spin_unlock(&nn->client_lock);
1238 if (cses->flags & SESSION4_BACK_CHAN) {
1239 struct sockaddr *sa = svc_addr(rqstp);
1241 * This is a little silly; with sessions there's no real
1242 * use for the callback address. Use the peer address
1243 * as a reasonable default for now, but consider fixing
1244 * the rpc client not to require an address in the
1247 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1248 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1252 /* caller must hold client_lock */
1253 static struct nfsd4_session *
1254 __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1256 struct nfsd4_session *elem;
1258 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1260 dump_sessionid(__func__, sessionid);
1261 idx = hash_sessionid(sessionid);
1262 /* Search in the appropriate list */
1263 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1264 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1265 NFS4_MAX_SESSIONID_LEN)) {
1270 dprintk("%s: session not found\n", __func__);
1274 static struct nfsd4_session *
1275 find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1278 struct nfsd4_session *session;
1279 __be32 status = nfserr_badsession;
1281 session = __find_in_sessionid_hashtbl(sessionid, net);
1284 status = nfsd4_get_session_locked(session);
1292 /* caller must hold client_lock */
1294 unhash_session(struct nfsd4_session *ses)
1296 list_del(&ses->se_hash);
1297 spin_lock(&ses->se_client->cl_lock);
1298 list_del(&ses->se_perclnt);
1299 spin_unlock(&ses->se_client->cl_lock);
1302 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1304 STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1306 if (clid->cl_boot == nn->boot_time)
1308 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1309 clid->cl_boot, clid->cl_id, nn->boot_time);
1314 * XXX Should we use a slab cache ?
1315 * This type of memory management is somewhat inefficient, but we use it
1316 * anyway since SETCLIENTID is not a common operation.
1318 static struct nfs4_client *alloc_client(struct xdr_netobj name)
1320 struct nfs4_client *clp;
1322 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1325 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
1326 if (clp->cl_name.data == NULL) {
1330 clp->cl_name.len = name.len;
1331 INIT_LIST_HEAD(&clp->cl_sessions);
1332 idr_init(&clp->cl_stateids);
1333 atomic_set(&clp->cl_refcount, 0);
1334 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1335 INIT_LIST_HEAD(&clp->cl_idhash);
1336 INIT_LIST_HEAD(&clp->cl_openowners);
1337 INIT_LIST_HEAD(&clp->cl_delegations);
1338 INIT_LIST_HEAD(&clp->cl_lru);
1339 INIT_LIST_HEAD(&clp->cl_callbacks);
1340 INIT_LIST_HEAD(&clp->cl_revoked);
1341 spin_lock_init(&clp->cl_lock);
1342 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1347 free_client(struct nfs4_client *clp)
1349 struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
1351 lockdep_assert_held(&nn->client_lock);
1352 while (!list_empty(&clp->cl_sessions)) {
1353 struct nfsd4_session *ses;
1354 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1356 list_del(&ses->se_perclnt);
1357 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1360 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1361 free_svc_cred(&clp->cl_cred);
1362 kfree(clp->cl_name.data);
1363 idr_destroy(&clp->cl_stateids);
1367 /* must be called under the client_lock */
1369 unhash_client_locked(struct nfs4_client *clp)
1371 struct nfsd4_session *ses;
1373 list_del(&clp->cl_lru);
1374 spin_lock(&clp->cl_lock);
1375 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1376 list_del_init(&ses->se_hash);
1377 spin_unlock(&clp->cl_lock);
1381 destroy_client(struct nfs4_client *clp)
1383 struct nfs4_openowner *oo;
1384 struct nfs4_delegation *dp;
1385 struct list_head reaplist;
1386 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1388 INIT_LIST_HEAD(&reaplist);
1389 spin_lock(&state_lock);
1390 while (!list_empty(&clp->cl_delegations)) {
1391 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1392 list_del_init(&dp->dl_perclnt);
1393 /* Ensure that deleg break won't try to requeue it */
1395 list_move(&dp->dl_recall_lru, &reaplist);
1397 spin_unlock(&state_lock);
1398 while (!list_empty(&reaplist)) {
1399 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1400 destroy_delegation(dp);
1402 list_splice_init(&clp->cl_revoked, &reaplist);
1403 while (!list_empty(&reaplist)) {
1404 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1405 destroy_revoked_delegation(dp);
1407 while (!list_empty(&clp->cl_openowners)) {
1408 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1409 release_openowner(oo);
1411 nfsd4_shutdown_callback(clp);
1412 if (clp->cl_cb_conn.cb_xprt)
1413 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
1414 list_del(&clp->cl_idhash);
1415 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1416 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1418 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1419 spin_lock(&nn->client_lock);
1420 unhash_client_locked(clp);
1421 WARN_ON_ONCE(atomic_read(&clp->cl_refcount));
1423 spin_unlock(&nn->client_lock);
1426 static void expire_client(struct nfs4_client *clp)
1428 nfsd4_client_record_remove(clp);
1429 destroy_client(clp);
1432 static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1434 memcpy(target->cl_verifier.data, source->data,
1435 sizeof(target->cl_verifier.data));
1438 static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1440 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1441 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1444 static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1446 if (source->cr_principal) {
1447 target->cr_principal =
1448 kstrdup(source->cr_principal, GFP_KERNEL);
1449 if (target->cr_principal == NULL)
1452 target->cr_principal = NULL;
1453 target->cr_flavor = source->cr_flavor;
1454 target->cr_uid = source->cr_uid;
1455 target->cr_gid = source->cr_gid;
1456 target->cr_group_info = source->cr_group_info;
1457 get_group_info(target->cr_group_info);
1458 target->cr_gss_mech = source->cr_gss_mech;
1459 if (source->cr_gss_mech)
1460 gss_mech_get(source->cr_gss_mech);
1465 compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1469 res = o1->len - o2->len;
1472 return (long long)memcmp(o1->data, o2->data, o1->len);
1475 static int same_name(const char *n1, const char *n2)
1477 return 0 == memcmp(n1, n2, HEXDIR_LEN);
1481 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1483 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
1487 same_clid(clientid_t *cl1, clientid_t *cl2)
1489 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
1492 static bool groups_equal(struct group_info *g1, struct group_info *g2)
1496 if (g1->ngroups != g2->ngroups)
1498 for (i=0; i<g1->ngroups; i++)
1499 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
1505 * RFC 3530 language requires clid_inuse be returned when the
1506 * "principal" associated with a requests differs from that previously
1507 * used. We use uid, gid's, and gss principal string as our best
1508 * approximation. We also don't want to allow non-gss use of a client
1509 * established using gss: in theory cr_principal should catch that
1510 * change, but in practice cr_principal can be null even in the gss case
1511 * since gssd doesn't always pass down a principal string.
1513 static bool is_gss_cred(struct svc_cred *cr)
1515 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1516 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1521 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1523 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
1524 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1525 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
1526 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1528 if (cr1->cr_principal == cr2->cr_principal)
1530 if (!cr1->cr_principal || !cr2->cr_principal)
1532 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
1535 static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1537 struct svc_cred *cr = &rqstp->rq_cred;
1540 if (!cr->cr_gss_mech)
1542 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1543 return service == RPC_GSS_SVC_INTEGRITY ||
1544 service == RPC_GSS_SVC_PRIVACY;
1547 static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1549 struct svc_cred *cr = &rqstp->rq_cred;
1551 if (!cl->cl_mach_cred)
1553 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1555 if (!svc_rqst_integrity_protected(rqstp))
1557 if (!cr->cr_principal)
1559 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1562 static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
1564 static u32 current_clientid = 1;
1566 clp->cl_clientid.cl_boot = nn->boot_time;
1567 clp->cl_clientid.cl_id = current_clientid++;
1570 static void gen_confirm(struct nfs4_client *clp)
1576 * This is opaque to client, so no need to byte-swap. Use
1577 * __force to keep sparse happy
1579 verf[0] = (__force __be32)get_seconds();
1580 verf[1] = (__force __be32)i++;
1581 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
1584 static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
1586 struct nfs4_stid *ret;
1588 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1589 if (!ret || !ret->sc_type)
1594 static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
1596 struct nfs4_stid *s;
1598 s = find_stateid(cl, t);
1601 if (typemask & s->sc_type)
1606 static struct nfs4_client *create_client(struct xdr_netobj name,
1607 struct svc_rqst *rqstp, nfs4_verifier *verf)
1609 struct nfs4_client *clp;
1610 struct sockaddr *sa = svc_addr(rqstp);
1612 struct net *net = SVC_NET(rqstp);
1613 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1615 clp = alloc_client(name);
1619 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1621 spin_lock(&nn->client_lock);
1623 spin_unlock(&nn->client_lock);
1626 nfsd4_init_callback(&clp->cl_cb_null);
1627 clp->cl_time = get_seconds();
1628 clear_bit(0, &clp->cl_cb_slot_busy);
1629 copy_verf(clp, verf);
1630 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
1632 clp->cl_cb_session = NULL;
1638 add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1640 struct rb_node **new = &(root->rb_node), *parent = NULL;
1641 struct nfs4_client *clp;
1644 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1647 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1648 new = &((*new)->rb_left);
1650 new = &((*new)->rb_right);
1653 rb_link_node(&new_clp->cl_namenode, parent, new);
1654 rb_insert_color(&new_clp->cl_namenode, root);
1657 static struct nfs4_client *
1658 find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1661 struct rb_node *node = root->rb_node;
1662 struct nfs4_client *clp;
1665 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1666 cmp = compare_blob(&clp->cl_name, name);
1668 node = node->rb_left;
1670 node = node->rb_right;
1678 add_to_unconfirmed(struct nfs4_client *clp)
1680 unsigned int idhashval;
1681 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1683 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1684 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
1685 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1686 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
1691 move_to_confirmed(struct nfs4_client *clp)
1693 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1694 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1696 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
1697 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
1698 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1699 add_clp_to_name_tree(clp, &nn->conf_name_tree);
1700 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1704 static struct nfs4_client *
1705 find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
1707 struct nfs4_client *clp;
1708 unsigned int idhashval = clientid_hashval(clid->cl_id);
1710 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
1711 if (same_clid(&clp->cl_clientid, clid)) {
1712 if ((bool)clp->cl_minorversion != sessions)
1721 static struct nfs4_client *
1722 find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1724 struct list_head *tbl = nn->conf_id_hashtbl;
1726 return find_client_in_id_table(tbl, clid, sessions);
1729 static struct nfs4_client *
1730 find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1732 struct list_head *tbl = nn->unconf_id_hashtbl;
1734 return find_client_in_id_table(tbl, clid, sessions);
1737 static bool clp_used_exchangeid(struct nfs4_client *clp)
1739 return clp->cl_exchange_flags != 0;
1742 static struct nfs4_client *
1743 find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1745 return find_clp_in_name_tree(name, &nn->conf_name_tree);
1748 static struct nfs4_client *
1749 find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1751 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
1755 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
1757 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
1758 struct sockaddr *sa = svc_addr(rqstp);
1759 u32 scopeid = rpc_get_scope_id(sa);
1760 unsigned short expected_family;
1762 /* Currently, we only support tcp and tcp6 for the callback channel */
1763 if (se->se_callback_netid_len == 3 &&
1764 !memcmp(se->se_callback_netid_val, "tcp", 3))
1765 expected_family = AF_INET;
1766 else if (se->se_callback_netid_len == 4 &&
1767 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1768 expected_family = AF_INET6;
1772 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
1773 se->se_callback_addr_len,
1774 (struct sockaddr *)&conn->cb_addr,
1775 sizeof(conn->cb_addr));
1777 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
1780 if (conn->cb_addr.ss_family == AF_INET6)
1781 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
1783 conn->cb_prog = se->se_callback_prog;
1784 conn->cb_ident = se->se_callback_ident;
1785 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
1788 conn->cb_addr.ss_family = AF_UNSPEC;
1789 conn->cb_addrlen = 0;
1790 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
1791 "will not receive delegations\n",
1792 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1798 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1801 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1803 struct xdr_buf *buf = resp->xdr.buf;
1804 struct nfsd4_slot *slot = resp->cstate.slot;
1807 dprintk("--> %s slot %p\n", __func__, slot);
1809 slot->sl_opcnt = resp->opcnt;
1810 slot->sl_status = resp->cstate.status;
1812 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
1813 if (nfsd4_not_cached(resp)) {
1814 slot->sl_datalen = 0;
1817 base = resp->cstate.data_offset;
1818 slot->sl_datalen = buf->len - base;
1819 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
1820 WARN("%s: sessions DRC could not cache compound\n", __func__);
1825 * Encode the replay sequence operation from the slot values.
1826 * If cachethis is FALSE encode the uncached rep error on the next
1827 * operation which sets resp->p and increments resp->opcnt for
1828 * nfs4svc_encode_compoundres.
1832 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1833 struct nfsd4_compoundres *resp)
1835 struct nfsd4_op *op;
1836 struct nfsd4_slot *slot = resp->cstate.slot;
1838 /* Encode the replayed sequence operation */
1839 op = &args->ops[resp->opcnt - 1];
1840 nfsd4_encode_operation(resp, op);
1842 /* Return nfserr_retry_uncached_rep in next operation. */
1843 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
1844 op = &args->ops[resp->opcnt++];
1845 op->status = nfserr_retry_uncached_rep;
1846 nfsd4_encode_operation(resp, op);
1852 * The sequence operation is not cached because we can use the slot and
1856 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1857 struct nfsd4_sequence *seq)
1859 struct nfsd4_slot *slot = resp->cstate.slot;
1860 struct xdr_stream *xdr = &resp->xdr;
1864 dprintk("--> %s slot %p\n", __func__, slot);
1866 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1870 p = xdr_reserve_space(xdr, slot->sl_datalen);
1873 return nfserr_serverfault;
1875 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
1876 xdr_commit_encode(xdr);
1878 resp->opcnt = slot->sl_opcnt;
1879 return slot->sl_status;
1883 * Set the exchange_id flags returned by the server.
1886 nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1888 /* pNFS is not supported */
1889 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1891 /* Referrals are supported, Migration is not. */
1892 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1894 /* set the wire flags to return to client. */
1895 clid->flags = new->cl_exchange_flags;
1898 static bool client_has_state(struct nfs4_client *clp)
1901 * Note clp->cl_openowners check isn't quite right: there's no
1902 * need to count owners without stateid's.
1904 * Also note we should probably be using this in 4.0 case too.
1906 return !list_empty(&clp->cl_openowners)
1907 || !list_empty(&clp->cl_delegations)
1908 || !list_empty(&clp->cl_sessions);
1912 nfsd4_exchange_id(struct svc_rqst *rqstp,
1913 struct nfsd4_compound_state *cstate,
1914 struct nfsd4_exchange_id *exid)
1916 struct nfs4_client *unconf, *conf, *new;
1918 char addr_str[INET6_ADDRSTRLEN];
1919 nfs4_verifier verf = exid->verifier;
1920 struct sockaddr *sa = svc_addr(rqstp);
1921 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
1922 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1924 rpc_ntop(sa, addr_str, sizeof(addr_str));
1925 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1926 "ip_addr=%s flags %x, spa_how %d\n",
1927 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
1928 addr_str, exid->flags, exid->spa_how);
1930 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
1931 return nfserr_inval;
1933 switch (exid->spa_how) {
1935 if (!svc_rqst_integrity_protected(rqstp))
1936 return nfserr_inval;
1939 default: /* checked by xdr code */
1942 return nfserr_encr_alg_unsupp;
1945 /* Cases below refer to rfc 5661 section 18.35.4: */
1947 conf = find_confirmed_client_by_name(&exid->clname, nn);
1949 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
1950 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
1953 if (!clp_used_exchangeid(conf)) { /* buggy client */
1954 status = nfserr_inval;
1957 if (!mach_creds_match(conf, rqstp)) {
1958 status = nfserr_wrong_cred;
1961 if (!creds_match) { /* case 9 */
1962 status = nfserr_perm;
1965 if (!verfs_match) { /* case 8 */
1966 status = nfserr_not_same;
1970 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1974 if (!creds_match) { /* case 3 */
1975 if (client_has_state(conf)) {
1976 status = nfserr_clid_inuse;
1979 expire_client(conf);
1982 if (verfs_match) { /* case 2 */
1983 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
1987 /* case 5, client reboot */
1991 if (update) { /* case 7 */
1992 status = nfserr_noent;
1996 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
1997 if (unconf) /* case 4, possible retry or client restart */
1998 expire_client(unconf);
2000 /* case 1 (normal case) */
2002 new = create_client(exid->clname, rqstp, &verf);
2004 status = nfserr_jukebox;
2007 new->cl_minorversion = cstate->minorversion;
2008 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
2011 add_to_unconfirmed(new);
2013 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
2014 exid->clientid.cl_id = new->cl_clientid.cl_id;
2016 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
2017 nfsd4_set_ex_flags(new, exid);
2019 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2020 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
2024 nfs4_unlock_state();
2029 check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
2031 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2034 /* The slot is in use, and no response has been sent. */
2036 if (seqid == slot_seqid)
2037 return nfserr_jukebox;
2039 return nfserr_seq_misordered;
2041 /* Note unsigned 32-bit arithmetic handles wraparound: */
2042 if (likely(seqid == slot_seqid + 1))
2044 if (seqid == slot_seqid)
2045 return nfserr_replay_cache;
2046 return nfserr_seq_misordered;
2050 * Cache the create session result into the create session single DRC
2051 * slot cache by saving the xdr structure. sl_seqid has been set.
2052 * Do this for solo or embedded create session operations.
2055 nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
2056 struct nfsd4_clid_slot *slot, __be32 nfserr)
2058 slot->sl_status = nfserr;
2059 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2063 nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2064 struct nfsd4_clid_slot *slot)
2066 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2067 return slot->sl_status;
2070 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2071 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2072 1 + /* MIN tag is length with zero, only length */ \
2073 3 + /* version, opcount, opcode */ \
2074 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2075 /* seqid, slotID, slotID, cache */ \
2076 4 ) * sizeof(__be32))
2078 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2079 2 + /* verifier: AUTH_NULL, length 0 */\
2081 1 + /* MIN tag is length with zero, only length */ \
2082 3 + /* opcount, opcode, opstatus*/ \
2083 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2084 /* seqid, slotID, slotID, slotID, status */ \
2085 5 ) * sizeof(__be32))
2087 static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
2089 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2091 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2092 return nfserr_toosmall;
2093 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2094 return nfserr_toosmall;
2095 ca->headerpadsz = 0;
2096 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2097 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2098 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2099 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2100 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2101 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2103 * Note decreasing slot size below client's request may make it
2104 * difficult for client to function correctly, whereas
2105 * decreasing the number of slots will (just?) affect
2106 * performance. When short on memory we therefore prefer to
2107 * decrease number of slots instead of their size. Clients that
2108 * request larger slots than they need will get poor results:
2110 ca->maxreqs = nfsd4_get_drc_mem(ca);
2112 return nfserr_jukebox;
2117 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2118 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2119 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2120 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2122 static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2124 ca->headerpadsz = 0;
2127 * These RPC_MAX_HEADER macros are overkill, especially since we
2128 * don't even do gss on the backchannel yet. But this is still
2129 * less than 1k. Tighten up this estimate in the unlikely event
2130 * it turns out to be a problem for some client:
2132 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
2133 return nfserr_toosmall;
2134 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
2135 return nfserr_toosmall;
2136 ca->maxresp_cached = 0;
2138 return nfserr_toosmall;
2143 static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2145 switch (cbs->flavor) {
2151 * GSS case: the spec doesn't allow us to return this
2152 * error. But it also doesn't allow us not to support
2154 * I'd rather this fail hard than return some error the
2155 * client might think it can already handle:
2157 return nfserr_encr_alg_unsupp;
2162 nfsd4_create_session(struct svc_rqst *rqstp,
2163 struct nfsd4_compound_state *cstate,
2164 struct nfsd4_create_session *cr_ses)
2166 struct sockaddr *sa = svc_addr(rqstp);
2167 struct nfs4_client *conf, *unconf;
2168 struct nfsd4_session *new;
2169 struct nfsd4_conn *conn;
2170 struct nfsd4_clid_slot *cs_slot = NULL;
2172 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2174 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2175 return nfserr_inval;
2176 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2179 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
2182 status = check_backchannel_attrs(&cr_ses->back_channel);
2184 goto out_release_drc_mem;
2185 status = nfserr_jukebox;
2186 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
2188 goto out_release_drc_mem;
2189 conn = alloc_conn_from_crses(rqstp, cr_ses);
2191 goto out_free_session;
2194 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
2195 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
2196 WARN_ON_ONCE(conf && unconf);
2199 status = nfserr_wrong_cred;
2200 if (!mach_creds_match(conf, rqstp))
2202 cs_slot = &conf->cl_cs_slot;
2203 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2204 if (status == nfserr_replay_cache) {
2205 status = nfsd4_replay_create_session(cr_ses, cs_slot);
2207 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
2208 status = nfserr_seq_misordered;
2211 } else if (unconf) {
2212 struct nfs4_client *old;
2213 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
2214 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
2215 status = nfserr_clid_inuse;
2218 status = nfserr_wrong_cred;
2219 if (!mach_creds_match(unconf, rqstp))
2221 cs_slot = &unconf->cl_cs_slot;
2222 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2224 /* an unconfirmed replay returns misordered */
2225 status = nfserr_seq_misordered;
2228 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
2230 status = mark_client_expired(old);
2235 move_to_confirmed(unconf);
2238 status = nfserr_stale_clientid;
2243 * We do not support RDMA or persistent sessions
2245 cr_ses->flags &= ~SESSION4_PERSIST;
2246 cr_ses->flags &= ~SESSION4_RDMA;
2248 init_session(rqstp, new, conf, cr_ses);
2249 nfsd4_init_conn(rqstp, conn, new);
2251 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
2252 NFS4_MAX_SESSIONID_LEN);
2253 cs_slot->sl_seqid++;
2254 cr_ses->seqid = cs_slot->sl_seqid;
2256 /* cache solo and embedded create sessions under the state lock */
2257 nfsd4_cache_create_session(cr_ses, cs_slot, status);
2258 nfs4_unlock_state();
2261 nfs4_unlock_state();
2264 __free_session(new);
2265 out_release_drc_mem:
2266 nfsd4_put_drc_mem(&cr_ses->fore_channel);
2270 static __be32 nfsd4_map_bcts_dir(u32 *dir)
2273 case NFS4_CDFC4_FORE:
2274 case NFS4_CDFC4_BACK:
2276 case NFS4_CDFC4_FORE_OR_BOTH:
2277 case NFS4_CDFC4_BACK_OR_BOTH:
2278 *dir = NFS4_CDFC4_BOTH;
2281 return nfserr_inval;
2284 __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2286 struct nfsd4_session *session = cstate->session;
2287 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2290 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2293 spin_lock(&nn->client_lock);
2294 session->se_cb_prog = bc->bc_cb_program;
2295 session->se_cb_sec = bc->bc_cb_sec;
2296 spin_unlock(&nn->client_lock);
2298 nfsd4_probe_callback(session->se_client);
2303 __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2304 struct nfsd4_compound_state *cstate,
2305 struct nfsd4_bind_conn_to_session *bcts)
2308 struct nfsd4_conn *conn;
2309 struct nfsd4_session *session;
2310 struct net *net = SVC_NET(rqstp);
2311 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2313 if (!nfsd4_last_compound_op(rqstp))
2314 return nfserr_not_only_op;
2316 spin_lock(&nn->client_lock);
2317 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
2318 spin_unlock(&nn->client_lock);
2320 goto out_no_session;
2321 status = nfserr_wrong_cred;
2322 if (!mach_creds_match(session->se_client, rqstp))
2324 status = nfsd4_map_bcts_dir(&bcts->dir);
2327 conn = alloc_conn(rqstp, bcts->dir);
2328 status = nfserr_jukebox;
2331 nfsd4_init_conn(rqstp, conn, session);
2334 nfsd4_put_session(session);
2336 nfs4_unlock_state();
2340 static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2344 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2348 nfsd4_destroy_session(struct svc_rqst *r,
2349 struct nfsd4_compound_state *cstate,
2350 struct nfsd4_destroy_session *sessionid)
2352 struct nfsd4_session *ses;
2354 int ref_held_by_me = 0;
2355 struct net *net = SVC_NET(r);
2356 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2359 status = nfserr_not_only_op;
2360 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
2361 if (!nfsd4_last_compound_op(r))
2365 dump_sessionid(__func__, &sessionid->sessionid);
2366 spin_lock(&nn->client_lock);
2367 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
2369 goto out_client_lock;
2370 status = nfserr_wrong_cred;
2371 if (!mach_creds_match(ses->se_client, r))
2372 goto out_put_session;
2373 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
2375 goto out_put_session;
2376 unhash_session(ses);
2377 spin_unlock(&nn->client_lock);
2379 nfsd4_probe_callback_sync(ses->se_client);
2381 spin_lock(&nn->client_lock);
2384 nfsd4_put_session_locked(ses);
2386 spin_unlock(&nn->client_lock);
2388 nfs4_unlock_state();
2392 static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
2394 struct nfsd4_conn *c;
2396 list_for_each_entry(c, &s->se_conns, cn_persession) {
2397 if (c->cn_xprt == xpt) {
2404 static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
2406 struct nfs4_client *clp = ses->se_client;
2407 struct nfsd4_conn *c;
2408 __be32 status = nfs_ok;
2411 spin_lock(&clp->cl_lock);
2412 c = __nfsd4_find_conn(new->cn_xprt, ses);
2415 status = nfserr_conn_not_bound_to_session;
2416 if (clp->cl_mach_cred)
2418 __nfsd4_hash_conn(new, ses);
2419 spin_unlock(&clp->cl_lock);
2420 ret = nfsd4_register_conn(new);
2422 /* oops; xprt is already down: */
2423 nfsd4_conn_lost(&new->cn_xpt_user);
2426 spin_unlock(&clp->cl_lock);
2431 static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2433 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2435 return args->opcnt > session->se_fchannel.maxops;
2438 static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2439 struct nfsd4_session *session)
2441 struct xdr_buf *xb = &rqstp->rq_arg;
2443 return xb->len > session->se_fchannel.maxreq_sz;
2447 nfsd4_sequence(struct svc_rqst *rqstp,
2448 struct nfsd4_compound_state *cstate,
2449 struct nfsd4_sequence *seq)
2451 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2452 struct xdr_stream *xdr = &resp->xdr;
2453 struct nfsd4_session *session;
2454 struct nfs4_client *clp;
2455 struct nfsd4_slot *slot;
2456 struct nfsd4_conn *conn;
2459 struct net *net = SVC_NET(rqstp);
2460 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2462 if (resp->opcnt != 1)
2463 return nfserr_sequence_pos;
2466 * Will be either used or freed by nfsd4_sequence_check_conn
2469 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2471 return nfserr_jukebox;
2473 spin_lock(&nn->client_lock);
2474 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
2476 goto out_no_session;
2477 clp = session->se_client;
2479 status = nfserr_too_many_ops;
2480 if (nfsd4_session_too_many_ops(rqstp, session))
2481 goto out_put_session;
2483 status = nfserr_req_too_big;
2484 if (nfsd4_request_too_big(rqstp, session))
2485 goto out_put_session;
2487 status = nfserr_badslot;
2488 if (seq->slotid >= session->se_fchannel.maxreqs)
2489 goto out_put_session;
2491 slot = session->se_slots[seq->slotid];
2492 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2494 /* We do not negotiate the number of slots yet, so set the
2495 * maxslots to the session maxreqs which is used to encode
2496 * sr_highest_slotid and the sr_target_slot id to maxslots */
2497 seq->maxslots = session->se_fchannel.maxreqs;
2499 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2500 slot->sl_flags & NFSD4_SLOT_INUSE);
2501 if (status == nfserr_replay_cache) {
2502 status = nfserr_seq_misordered;
2503 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
2504 goto out_put_session;
2505 cstate->slot = slot;
2506 cstate->session = session;
2508 /* Return the cached reply status and set cstate->status
2509 * for nfsd4_proc_compound processing */
2510 status = nfsd4_replay_cache_entry(resp, seq);
2511 cstate->status = nfserr_replay_cache;
2515 goto out_put_session;
2517 status = nfsd4_sequence_check_conn(conn, session);
2520 goto out_put_session;
2522 buflen = (seq->cachethis) ?
2523 session->se_fchannel.maxresp_cached :
2524 session->se_fchannel.maxresp_sz;
2525 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2527 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
2528 goto out_put_session;
2529 svc_reserve(rqstp, buflen);
2532 /* Success! bump slot seqid */
2533 slot->sl_seqid = seq->seqid;
2534 slot->sl_flags |= NFSD4_SLOT_INUSE;
2536 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
2538 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
2540 cstate->slot = slot;
2541 cstate->session = session;
2545 switch (clp->cl_cb_state) {
2547 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2549 case NFSD4_CB_FAULT:
2550 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2553 seq->status_flags = 0;
2555 if (!list_empty(&clp->cl_revoked))
2556 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
2560 spin_unlock(&nn->client_lock);
2563 nfsd4_put_session_locked(session);
2564 goto out_no_session;
2568 nfsd4_sequence_done(struct nfsd4_compoundres *resp)
2570 struct nfsd4_compound_state *cs = &resp->cstate;
2572 if (nfsd4_has_session(cs)) {
2573 if (cs->status != nfserr_replay_cache) {
2574 nfsd4_store_cache_entry(resp);
2575 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
2577 /* Drop session reference that was taken in nfsd4_sequence() */
2578 nfsd4_put_session(cs->session);
2580 put_client_renew(cs->clp);
2584 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2586 struct nfs4_client *conf, *unconf, *clp;
2588 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2591 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
2592 conf = find_confirmed_client(&dc->clientid, true, nn);
2593 WARN_ON_ONCE(conf && unconf);
2598 if (client_has_state(conf)) {
2599 status = nfserr_clientid_busy;
2605 status = nfserr_stale_clientid;
2608 if (!mach_creds_match(clp, rqstp)) {
2609 status = nfserr_wrong_cred;
2614 nfs4_unlock_state();
2619 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2623 if (rc->rca_one_fs) {
2624 if (!cstate->current_fh.fh_dentry)
2625 return nfserr_nofilehandle;
2627 * We don't take advantage of the rca_one_fs case.
2628 * That's OK, it's optional, we can safely ignore it.
2634 status = nfserr_complete_already;
2635 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2636 &cstate->session->se_client->cl_flags))
2639 status = nfserr_stale_clientid;
2640 if (is_client_expired(cstate->session->se_client))
2642 * The following error isn't really legal.
2643 * But we only get here if the client just explicitly
2644 * destroyed the client. Surely it no longer cares what
2645 * error it gets back on an operation for the dead
2651 nfsd4_client_record_create(cstate->session->se_client);
2653 nfs4_unlock_state();
2658 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2659 struct nfsd4_setclientid *setclid)
2661 struct xdr_netobj clname = setclid->se_name;
2662 nfs4_verifier clverifier = setclid->se_verf;
2663 struct nfs4_client *conf, *unconf, *new;
2665 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2667 /* Cases below refer to rfc 3530 section 14.2.33: */
2669 conf = find_confirmed_client_by_name(&clname, nn);
2672 status = nfserr_clid_inuse;
2673 if (clp_used_exchangeid(conf))
2675 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
2676 char addr_str[INET6_ADDRSTRLEN];
2677 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2679 dprintk("NFSD: setclientid: string in use by client "
2680 "at %s\n", addr_str);
2684 unconf = find_unconfirmed_client_by_name(&clname, nn);
2686 expire_client(unconf);
2687 status = nfserr_jukebox;
2688 new = create_client(clname, rqstp, &clverifier);
2691 if (conf && same_verf(&conf->cl_verifier, &clverifier))
2692 /* case 1: probable callback update */
2693 copy_clid(new, conf);
2694 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2696 new->cl_minorversion = 0;
2697 gen_callback(new, setclid, rqstp);
2698 add_to_unconfirmed(new);
2699 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2700 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2701 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2704 nfs4_unlock_state();
2710 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2711 struct nfsd4_compound_state *cstate,
2712 struct nfsd4_setclientid_confirm *setclientid_confirm)
2714 struct nfs4_client *conf, *unconf;
2715 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2716 clientid_t * clid = &setclientid_confirm->sc_clientid;
2718 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2720 if (STALE_CLIENTID(clid, nn))
2721 return nfserr_stale_clientid;
2724 conf = find_confirmed_client(clid, false, nn);
2725 unconf = find_unconfirmed_client(clid, false, nn);
2727 * We try hard to give out unique clientid's, so if we get an
2728 * attempt to confirm the same clientid with a different cred,
2729 * there's a bug somewhere. Let's charitably assume it's our
2732 status = nfserr_serverfault;
2733 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2735 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2737 /* cases below refer to rfc 3530 section 14.2.34: */
2738 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2739 if (conf && !unconf) /* case 2: probable retransmit */
2741 else /* case 4: client hasn't noticed we rebooted yet? */
2742 status = nfserr_stale_clientid;
2746 if (conf) { /* case 1: callback update */
2747 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2748 nfsd4_probe_callback(conf);
2749 expire_client(unconf);
2750 } else { /* case 3: normal case; new or rebooted client */
2751 conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
2753 status = mark_client_expired(conf);
2756 expire_client(conf);
2758 move_to_confirmed(unconf);
2759 nfsd4_probe_callback(unconf);
2762 nfs4_unlock_state();
2766 static struct nfs4_file *nfsd4_alloc_file(void)
2768 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2771 /* OPEN Share state helper functions */
2772 static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2774 unsigned int hashval = file_hashval(ino);
2776 lockdep_assert_held(&state_lock);
2778 atomic_set(&fp->fi_ref, 1);
2779 spin_lock_init(&fp->fi_lock);
2780 INIT_LIST_HEAD(&fp->fi_stateids);
2781 INIT_LIST_HEAD(&fp->fi_delegations);
2784 fp->fi_had_conflict = false;
2785 fp->fi_lease = NULL;
2786 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2787 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2788 hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
2792 nfsd4_free_slabs(void)
2794 kmem_cache_destroy(openowner_slab);
2795 kmem_cache_destroy(lockowner_slab);
2796 kmem_cache_destroy(file_slab);
2797 kmem_cache_destroy(stateid_slab);
2798 kmem_cache_destroy(deleg_slab);
2802 nfsd4_init_slabs(void)
2804 openowner_slab = kmem_cache_create("nfsd4_openowners",
2805 sizeof(struct nfs4_openowner), 0, 0, NULL);
2806 if (openowner_slab == NULL)
2808 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
2809 sizeof(struct nfs4_lockowner), 0, 0, NULL);
2810 if (lockowner_slab == NULL)
2811 goto out_free_openowner_slab;
2812 file_slab = kmem_cache_create("nfsd4_files",
2813 sizeof(struct nfs4_file), 0, 0, NULL);
2814 if (file_slab == NULL)
2815 goto out_free_lockowner_slab;
2816 stateid_slab = kmem_cache_create("nfsd4_stateids",
2817 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
2818 if (stateid_slab == NULL)
2819 goto out_free_file_slab;
2820 deleg_slab = kmem_cache_create("nfsd4_delegations",
2821 sizeof(struct nfs4_delegation), 0, 0, NULL);
2822 if (deleg_slab == NULL)
2823 goto out_free_stateid_slab;
2826 out_free_stateid_slab:
2827 kmem_cache_destroy(stateid_slab);
2829 kmem_cache_destroy(file_slab);
2830 out_free_lockowner_slab:
2831 kmem_cache_destroy(lockowner_slab);
2832 out_free_openowner_slab:
2833 kmem_cache_destroy(openowner_slab);
2835 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2839 static void init_nfs4_replay(struct nfs4_replay *rp)
2841 rp->rp_status = nfserr_serverfault;
2843 rp->rp_buf = rp->rp_ibuf;
2846 static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
2848 struct nfs4_stateowner *sop;
2850 sop = kmem_cache_alloc(slab, GFP_KERNEL);
2854 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2855 if (!sop->so_owner.data) {
2856 kmem_cache_free(slab, sop);
2859 sop->so_owner.len = owner->len;
2861 INIT_LIST_HEAD(&sop->so_stateids);
2862 sop->so_client = clp;
2863 init_nfs4_replay(&sop->so_replay);
2867 static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
2869 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2871 list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
2872 list_add(&oo->oo_perclient, &clp->cl_openowners);
2875 static struct nfs4_openowner *
2876 alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
2877 struct nfsd4_compound_state *cstate)
2879 struct nfs4_client *clp = cstate->clp;
2880 struct nfs4_openowner *oo;
2882 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2885 oo->oo_owner.so_is_open_owner = 1;
2886 oo->oo_owner.so_seqid = open->op_seqid;
2887 oo->oo_flags = NFS4_OO_NEW;
2888 if (nfsd4_has_session(cstate))
2889 oo->oo_flags |= NFS4_OO_CONFIRMED;
2891 oo->oo_last_closed_stid = NULL;
2892 INIT_LIST_HEAD(&oo->oo_close_lru);
2893 hash_openowner(oo, clp, strhashval);
2897 static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
2898 struct nfs4_openowner *oo = open->op_openowner;
2900 stp->st_stid.sc_type = NFS4_OPEN_STID;
2901 INIT_LIST_HEAD(&stp->st_locks);
2902 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
2903 stp->st_stateowner = &oo->oo_owner;
2906 stp->st_access_bmap = 0;
2907 stp->st_deny_bmap = 0;
2908 set_access(open->op_share_access, stp);
2909 set_deny(open->op_share_deny, stp);
2910 stp->st_openstp = NULL;
2911 spin_lock(&fp->fi_lock);
2912 list_add(&stp->st_perfile, &fp->fi_stateids);
2913 spin_unlock(&fp->fi_lock);
2917 move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
2919 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2921 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
2923 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
2924 oo->oo_time = get_seconds();
2928 same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2931 return (sop->so_owner.len == owner->len) &&
2932 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2933 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
2936 static struct nfs4_openowner *
2937 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
2938 bool sessions, struct nfsd_net *nn)
2940 struct nfs4_stateowner *so;
2941 struct nfs4_openowner *oo;
2942 struct nfs4_client *clp;
2944 list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
2945 if (!so->so_is_open_owner)
2947 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2949 clp = oo->oo_owner.so_client;
2950 if ((bool)clp->cl_minorversion != sessions)
2952 renew_client(oo->oo_owner.so_client);
2959 /* search file_hashtbl[] for file */
2960 static struct nfs4_file *
2961 find_file_locked(struct inode *ino)
2963 unsigned int hashval = file_hashval(ino);
2964 struct nfs4_file *fp;
2966 lockdep_assert_held(&state_lock);
2968 hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
2969 if (fp->fi_inode == ino) {
2977 static struct nfs4_file *
2978 find_file(struct inode *ino)
2980 struct nfs4_file *fp;
2982 spin_lock(&state_lock);
2983 fp = find_file_locked(ino);
2984 spin_unlock(&state_lock);
2988 static struct nfs4_file *
2989 find_or_add_file(struct inode *ino, struct nfs4_file *new)
2991 struct nfs4_file *fp;
2993 spin_lock(&state_lock);
2994 fp = find_file_locked(ino);
2996 nfsd4_init_file(new, ino);
2999 spin_unlock(&state_lock);
3005 * Called to check deny when READ with all zero stateid or
3006 * WRITE with all zero or all one stateid
3009 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3011 struct inode *ino = current_fh->fh_dentry->d_inode;
3012 struct nfs4_file *fp;
3013 struct nfs4_ol_stateid *stp;
3016 fp = find_file(ino);
3019 ret = nfserr_locked;
3020 /* Search for conflicting share reservations */
3021 spin_lock(&fp->fi_lock);
3022 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
3023 if (test_deny(deny_type, stp) ||
3024 test_deny(NFS4_SHARE_DENY_BOTH, stp))
3029 spin_unlock(&fp->fi_lock);
3034 static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3036 struct nfs4_client *clp = dp->dl_stid.sc_client;
3037 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
3039 lockdep_assert_held(&state_lock);
3040 /* We're assuming the state code never drops its reference
3041 * without first removing the lease. Since we're in this lease
3042 * callback (and since the lease code is serialized by the kernel
3043 * lock) we know the server hasn't removed the lease yet, we know
3044 * it's safe to take a reference: */
3045 atomic_inc(&dp->dl_count);
3048 * If the dl_time != 0, then we know that it has already been
3049 * queued for a lease break. Don't queue it again.
3051 if (dp->dl_time == 0) {
3052 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
3053 dp->dl_time = get_seconds();
3056 block_delegations(&dp->dl_fh);
3058 nfsd4_cb_recall(dp);
3061 /* Called from break_lease() with i_lock held. */
3062 static void nfsd_break_deleg_cb(struct file_lock *fl)
3064 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
3065 struct nfs4_delegation *dp;
3068 WARN(1, "(%p)->fl_owner NULL\n", fl);
3071 if (fp->fi_had_conflict) {
3072 WARN(1, "duplicate break on %p\n", fp);
3076 * We don't want the locks code to timeout the lease for us;
3077 * we'll remove it ourself if a delegation isn't returned
3080 fl->fl_break_time = 0;
3082 spin_lock(&state_lock);
3083 fp->fi_had_conflict = true;
3084 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
3085 nfsd_break_one_deleg(dp);
3086 spin_unlock(&state_lock);
3090 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
3093 return lease_modify(onlist, arg);
3098 static const struct lock_manager_operations nfsd_lease_mng_ops = {
3099 .lm_break = nfsd_break_deleg_cb,
3100 .lm_change = nfsd_change_deleg_cb,
3103 static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3105 if (nfsd4_has_session(cstate))
3107 if (seqid == so->so_seqid - 1)
3108 return nfserr_replay_me;
3109 if (seqid == so->so_seqid)
3111 return nfserr_bad_seqid;
3114 static __be32 lookup_clientid(clientid_t *clid,
3115 struct nfsd4_compound_state *cstate,
3116 struct nfsd_net *nn)
3118 struct nfs4_client *found;
3121 found = cstate->clp;
3122 if (!same_clid(&found->cl_clientid, clid))
3123 return nfserr_stale_clientid;
3127 if (STALE_CLIENTID(clid, nn))
3128 return nfserr_stale_clientid;
3131 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3132 * cached already then we know this is for is for v4.0 and "sessions"
3135 WARN_ON_ONCE(cstate->session);
3136 found = find_confirmed_client(clid, false, nn);
3138 return nfserr_expired;
3140 /* Cache the nfs4_client in cstate! */
3141 cstate->clp = found;
3142 atomic_inc(&found->cl_refcount);
3147 nfsd4_process_open1(struct nfsd4_compound_state *cstate,
3148 struct nfsd4_open *open, struct nfsd_net *nn)
3150 clientid_t *clientid = &open->op_clientid;
3151 struct nfs4_client *clp = NULL;
3152 unsigned int strhashval;
3153 struct nfs4_openowner *oo = NULL;
3156 if (STALE_CLIENTID(&open->op_clientid, nn))
3157 return nfserr_stale_clientid;
3159 * In case we need it later, after we've already created the
3160 * file and don't want to risk a further failure:
3162 open->op_file = nfsd4_alloc_file();
3163 if (open->op_file == NULL)
3164 return nfserr_jukebox;
3166 status = lookup_clientid(clientid, cstate, nn);
3171 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
3172 oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
3173 open->op_openowner = oo;
3177 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
3178 /* Replace unconfirmed owners without checking for replay. */
3179 release_openowner(oo);
3180 open->op_openowner = NULL;
3183 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3188 oo = alloc_init_open_stateowner(strhashval, open, cstate);
3190 return nfserr_jukebox;
3191 open->op_openowner = oo;
3193 open->op_stp = nfs4_alloc_stateid(clp);
3195 return nfserr_jukebox;
3199 static inline __be32
3200 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3202 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3203 return nfserr_openmode;
3208 static int share_access_to_flags(u32 share_access)
3210 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3213 static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
3215 struct nfs4_stid *ret;
3217 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
3220 return delegstateid(ret);
3223 static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3225 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3226 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3230 nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
3231 struct nfs4_delegation **dp)
3234 __be32 status = nfserr_bad_stateid;
3236 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
3239 flags = share_access_to_flags(open->op_share_access);
3240 status = nfs4_check_delegmode(*dp, flags);
3244 if (!nfsd4_is_deleg_cur(open))
3248 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3253 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
3255 struct nfs4_ol_stateid *local;
3256 struct nfs4_openowner *oo = open->op_openowner;
3258 spin_lock(&fp->fi_lock);
3259 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3260 /* ignore lock owners */
3261 if (local->st_stateowner->so_is_open_owner == 0)
3263 /* remember if we have seen this open owner */
3264 if (local->st_stateowner == &oo->oo_owner)
3266 /* check for conflicting share reservations */
3267 if (!test_share(local, open)) {
3268 spin_unlock(&fp->fi_lock);
3269 return nfserr_share_denied;
3272 spin_unlock(&fp->fi_lock);
3276 static inline int nfs4_access_to_access(u32 nfs4_access)
3280 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
3281 flags |= NFSD_MAY_READ;
3282 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
3283 flags |= NFSD_MAY_WRITE;
3287 static inline __be32
3288 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
3289 struct nfsd4_open *open)
3291 struct iattr iattr = {
3292 .ia_valid = ATTR_SIZE,
3295 if (!open->op_truncate)
3297 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
3298 return nfserr_inval;
3299 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
3302 static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
3303 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
3304 struct nfsd4_open *open)
3306 struct file *filp = NULL;
3308 int oflag = nfs4_access_to_omode(open->op_share_access);
3309 int access = nfs4_access_to_access(open->op_share_access);
3311 spin_lock(&fp->fi_lock);
3312 if (!fp->fi_fds[oflag]) {
3313 spin_unlock(&fp->fi_lock);
3314 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
3317 spin_lock(&fp->fi_lock);
3318 if (!fp->fi_fds[oflag]) {
3319 fp->fi_fds[oflag] = filp;
3323 status = nfs4_file_get_access(fp, open->op_share_access);
3324 spin_unlock(&fp->fi_lock);
3328 goto out_put_access;
3330 status = nfsd4_truncate(rqstp, cur_fh, open);
3332 goto out_put_access;
3334 /* Set access and deny bits in stateid */
3335 set_access(open->op_share_access, stp);
3336 set_deny(open->op_share_deny, stp);
3340 nfs4_file_put_access(fp, open->op_share_access);
3346 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)
3350 if (!test_access(open->op_share_access, stp))
3351 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
3353 status = nfsd4_truncate(rqstp, cur_fh, open);
3362 nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
3364 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3367 /* Should we give out recallable state?: */
3368 static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3370 if (clp->cl_cb_state == NFSD4_CB_UP)
3373 * In the sessions case, since we don't have to establish a
3374 * separate connection for callbacks, we assume it's OK
3375 * until we hear otherwise:
3377 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3380 static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
3382 struct file_lock *fl;
3384 fl = locks_alloc_lock();
3387 locks_init_lock(fl);
3388 fl->fl_lmops = &nfsd_lease_mng_ops;
3389 fl->fl_flags = FL_DELEG;
3390 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3391 fl->fl_end = OFFSET_MAX;
3392 fl->fl_owner = (fl_owner_t)(dp->dl_file);
3393 fl->fl_pid = current->tgid;
3397 static int nfs4_setlease(struct nfs4_delegation *dp)
3399 struct nfs4_file *fp = dp->dl_file;
3400 struct file_lock *fl;
3403 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
3406 fl->fl_file = find_readable_file(fp);
3407 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
3411 fp->fi_deleg_file = fl->fl_file;
3412 atomic_set(&fp->fi_delegees, 1);
3413 spin_lock(&state_lock);
3414 hash_delegation_locked(dp, fp);
3415 spin_unlock(&state_lock);
3420 locks_free_lock(fl);
3424 static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
3426 if (fp->fi_had_conflict)
3431 return nfs4_setlease(dp);
3432 spin_lock(&state_lock);
3433 atomic_inc(&fp->fi_delegees);
3434 if (fp->fi_had_conflict) {
3435 spin_unlock(&state_lock);
3438 hash_delegation_locked(dp, fp);
3439 spin_unlock(&state_lock);
3443 static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
3445 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3446 if (status == -EAGAIN)
3447 open->op_why_no_deleg = WND4_CONTENTION;
3449 open->op_why_no_deleg = WND4_RESOURCE;
3450 switch (open->op_deleg_want) {
3451 case NFS4_SHARE_WANT_READ_DELEG:
3452 case NFS4_SHARE_WANT_WRITE_DELEG:
3453 case NFS4_SHARE_WANT_ANY_DELEG:
3455 case NFS4_SHARE_WANT_CANCEL:
3456 open->op_why_no_deleg = WND4_CANCELLED;
3458 case NFS4_SHARE_WANT_NO_DELEG:
3465 * Attempt to hand out a delegation.
3467 * Note we don't support write delegations, and won't until the vfs has
3468 * proper support for them.
3471 nfs4_open_delegation(struct net *net, struct svc_fh *fh,
3472 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
3474 struct nfs4_delegation *dp;
3475 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
3479 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
3480 open->op_recall = 0;
3481 switch (open->op_claim_type) {
3482 case NFS4_OPEN_CLAIM_PREVIOUS:
3484 open->op_recall = 1;
3485 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
3488 case NFS4_OPEN_CLAIM_NULL:
3489 case NFS4_OPEN_CLAIM_FH:
3491 * Let's not give out any delegations till everyone's
3492 * had the chance to reclaim theirs....
3494 if (locks_in_grace(net))
3496 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
3499 * Also, if the file was opened for write or
3500 * create, there's a good chance the client's
3501 * about to write to it, resulting in an
3502 * immediate recall (since we don't support
3503 * write delegations):
3505 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
3507 if (open->op_create == NFS4_OPEN_CREATE)
3513 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh);
3516 status = nfs4_set_delegation(dp, stp->st_file);
3520 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
3522 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
3523 STATEID_VAL(&dp->dl_stid.sc_stateid));
3524 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
3527 destroy_delegation(dp);
3529 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
3530 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
3531 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
3532 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3533 open->op_recall = 1;
3536 /* 4.1 client asking for a delegation? */
3537 if (open->op_deleg_want)
3538 nfsd4_open_deleg_none_ext(open, status);
3542 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
3543 struct nfs4_delegation *dp)
3545 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
3546 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3547 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3548 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
3549 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
3550 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3551 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3552 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
3554 /* Otherwise the client must be confused wanting a delegation
3555 * it already has, therefore we don't return
3556 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3561 * called with nfs4_lock_state() held.
3564 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
3566 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3567 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
3568 struct nfs4_file *fp = NULL;
3569 struct inode *ino = current_fh->fh_dentry->d_inode;
3570 struct nfs4_ol_stateid *stp = NULL;
3571 struct nfs4_delegation *dp = NULL;
3575 * Lookup file; if found, lookup stateid and check open request,
3576 * and check for delegations in the process of being recalled.
3577 * If not found, create the nfs4_file struct
3579 fp = find_or_add_file(ino, open->op_file);
3580 if (fp != open->op_file) {
3581 if ((status = nfs4_check_open(fp, open, &stp)))
3583 status = nfs4_check_deleg(cl, open, &dp);
3587 open->op_file = NULL;
3588 status = nfserr_bad_stateid;
3589 if (nfsd4_is_deleg_cur(open))
3591 status = nfserr_jukebox;
3595 * OPEN the file, or upgrade an existing OPEN.
3596 * If truncate fails, the OPEN fails.
3599 /* Stateid was found, this is an OPEN upgrade */
3600 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
3605 open->op_stp = NULL;
3606 init_open_stateid(stp, fp, open);
3607 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
3609 release_open_stateid(stp);
3613 update_stateid(&stp->st_stid.sc_stateid);
3614 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
3616 if (nfsd4_has_session(&resp->cstate)) {
3617 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3618 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3619 open->op_why_no_deleg = WND4_NOT_WANTED;
3625 * Attempt to hand out a delegation. No error return, because the
3626 * OPEN succeeds even if we fail.
3628 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
3632 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
3633 STATEID_VAL(&stp->st_stid.sc_stateid));
3635 /* 4.1 client trying to upgrade/downgrade delegation? */
3636 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
3637 open->op_deleg_want)
3638 nfsd4_deleg_xgrade_none_ext(open, dp);
3642 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
3643 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
3645 * To finish the open response, we just need to set the rflags.
3647 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
3648 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
3649 !nfsd4_has_session(&resp->cstate))
3650 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3655 void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3657 if (open->op_openowner) {
3658 struct nfs4_openowner *oo = open->op_openowner;
3660 if (!list_empty(&oo->oo_owner.so_stateids))
3661 list_del_init(&oo->oo_close_lru);
3662 if (oo->oo_flags & NFS4_OO_NEW) {
3664 release_openowner(oo);
3665 open->op_openowner = NULL;
3667 oo->oo_flags &= ~NFS4_OO_NEW;
3671 nfsd4_free_file(open->op_file);
3673 free_generic_stateid(open->op_stp);
3677 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3680 struct nfs4_client *clp;
3682 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3685 dprintk("process_renew(%08x/%08x): starting\n",
3686 clid->cl_boot, clid->cl_id);
3687 status = lookup_clientid(clid, cstate, nn);
3691 status = nfserr_cb_path_down;
3692 if (!list_empty(&clp->cl_delegations)
3693 && clp->cl_cb_state != NFSD4_CB_UP)
3697 nfs4_unlock_state();
3702 nfsd4_end_grace(struct nfsd_net *nn)
3704 /* do nothing if grace period already ended */
3705 if (nn->grace_ended)
3708 dprintk("NFSD: end of grace period\n");
3709 nn->grace_ended = true;
3710 nfsd4_record_grace_done(nn, nn->boot_time);
3711 locks_end_grace(&nn->nfsd4_manager);
3713 * Now that every NFSv4 client has had the chance to recover and
3714 * to see the (possibly new, possibly shorter) lease time, we
3715 * can safely set the next grace time to the current lease time:
3717 nn->nfsd4_grace = nn->nfsd4_lease;
3721 nfs4_laundromat(struct nfsd_net *nn)
3723 struct nfs4_client *clp;
3724 struct nfs4_openowner *oo;
3725 struct nfs4_delegation *dp;
3726 struct list_head *pos, *next, reaplist;
3727 time_t cutoff = get_seconds() - nn->nfsd4_lease;
3728 time_t t, new_timeo = nn->nfsd4_lease;
3732 dprintk("NFSD: laundromat service - starting\n");
3733 nfsd4_end_grace(nn);
3734 INIT_LIST_HEAD(&reaplist);
3735 spin_lock(&nn->client_lock);
3736 list_for_each_safe(pos, next, &nn->client_lru) {
3737 clp = list_entry(pos, struct nfs4_client, cl_lru);
3738 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3739 t = clp->cl_time - cutoff;
3740 new_timeo = min(new_timeo, t);
3743 if (mark_client_expired_locked(clp)) {
3744 dprintk("NFSD: client in use (clientid %08x)\n",
3745 clp->cl_clientid.cl_id);
3748 list_move(&clp->cl_lru, &reaplist);
3750 spin_unlock(&nn->client_lock);
3751 list_for_each_safe(pos, next, &reaplist) {
3752 clp = list_entry(pos, struct nfs4_client, cl_lru);
3753 dprintk("NFSD: purging unused client (clientid %08x)\n",
3754 clp->cl_clientid.cl_id);
3757 spin_lock(&state_lock);
3758 list_for_each_safe(pos, next, &nn->del_recall_lru) {
3759 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3760 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
3762 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3763 t = dp->dl_time - cutoff;
3764 new_timeo = min(new_timeo, t);
3767 list_move(&dp->dl_recall_lru, &reaplist);
3769 spin_unlock(&state_lock);
3770 list_for_each_safe(pos, next, &reaplist) {
3771 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3772 revoke_delegation(dp);
3774 list_for_each_safe(pos, next, &nn->close_lru) {
3775 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3776 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3777 t = oo->oo_time - cutoff;
3778 new_timeo = min(new_timeo, t);
3781 release_openowner(oo);
3783 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
3784 nfs4_unlock_state();
3788 static struct workqueue_struct *laundry_wq;
3789 static void laundromat_main(struct work_struct *);
3792 laundromat_main(struct work_struct *laundry)
3795 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
3797 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
3800 t = nfs4_laundromat(nn);
3801 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
3802 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
3805 static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
3807 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3808 return nfserr_bad_stateid;
3813 access_permit_read(struct nfs4_ol_stateid *stp)
3815 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3816 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3817 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
3821 access_permit_write(struct nfs4_ol_stateid *stp)
3823 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3824 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
3828 __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
3830 __be32 status = nfserr_openmode;
3832 /* For lock stateid's, we test the parent open, not the lock: */
3833 if (stp->st_openstp)
3834 stp = stp->st_openstp;
3835 if ((flags & WR_STATE) && !access_permit_write(stp))
3837 if ((flags & RD_STATE) && !access_permit_read(stp))
3844 static inline __be32
3845 check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
3847 if (ONE_STATEID(stateid) && (flags & RD_STATE))
3849 else if (locks_in_grace(net)) {
3850 /* Answer in remaining cases depends on existence of
3851 * conflicting state; so we must wait out the grace period. */
3852 return nfserr_grace;
3853 } else if (flags & WR_STATE)
3854 return nfs4_share_conflict(current_fh,
3855 NFS4_SHARE_DENY_WRITE);
3856 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3857 return nfs4_share_conflict(current_fh,
3858 NFS4_SHARE_DENY_READ);
3862 * Allow READ/WRITE during grace period on recovered state only for files
3863 * that are not able to provide mandatory locking.
3866 grace_disallows_io(struct net *net, struct inode *inode)
3868 return locks_in_grace(net) && mandatory_lock(inode);
3871 /* Returns true iff a is later than b: */
3872 static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3874 return (s32)(a->si_generation - b->si_generation) > 0;
3877 static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
3880 * When sessions are used the stateid generation number is ignored
3883 if (has_session && in->si_generation == 0)
3886 if (in->si_generation == ref->si_generation)
3889 /* If the client sends us a stateid from the future, it's buggy: */
3890 if (stateid_generation_after(in, ref))
3891 return nfserr_bad_stateid;
3893 * However, we could see a stateid from the past, even from a
3894 * non-buggy client. For example, if the client sends a lock
3895 * while some IO is outstanding, the lock may bump si_generation
3896 * while the IO is still in flight. The client could avoid that
3897 * situation by waiting for responses on all the IO requests,
3898 * but better performance may result in retrying IO that
3899 * receives an old_stateid error if requests are rarely
3900 * reordered in flight:
3902 return nfserr_old_stateid;
3905 static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
3907 struct nfs4_stid *s;
3908 struct nfs4_ol_stateid *ols;
3911 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3912 return nfserr_bad_stateid;
3913 /* Client debugging aid. */
3914 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
3915 char addr_str[INET6_ADDRSTRLEN];
3916 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
3918 pr_warn_ratelimited("NFSD: client %s testing state ID "
3919 "with incorrect client ID\n", addr_str);
3920 return nfserr_bad_stateid;
3922 s = find_stateid(cl, stateid);
3924 return nfserr_bad_stateid;
3925 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
3928 switch (s->sc_type) {
3929 case NFS4_DELEG_STID:
3931 case NFS4_REVOKED_DELEG_STID:
3932 return nfserr_deleg_revoked;
3933 case NFS4_OPEN_STID:
3934 case NFS4_LOCK_STID:
3935 ols = openlockstateid(s);
3936 if (ols->st_stateowner->so_is_open_owner
3937 && !(openowner(ols->st_stateowner)->oo_flags
3938 & NFS4_OO_CONFIRMED))
3939 return nfserr_bad_stateid;
3942 printk("unknown stateid type %x\n", s->sc_type);
3943 case NFS4_CLOSED_STID:
3944 return nfserr_bad_stateid;
3949 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
3950 stateid_t *stateid, unsigned char typemask,
3951 struct nfs4_stid **s, struct nfsd_net *nn)
3955 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3956 return nfserr_bad_stateid;
3957 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
3958 if (status == nfserr_stale_clientid) {
3959 if (cstate->session)
3960 return nfserr_bad_stateid;
3961 return nfserr_stale_stateid;
3965 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
3967 return nfserr_bad_stateid;
3972 * Checks for stateid operations
3975 nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
3976 stateid_t *stateid, int flags, struct file **filpp)
3978 struct nfs4_stid *s;
3979 struct nfs4_ol_stateid *stp = NULL;
3980 struct nfs4_delegation *dp = NULL;
3981 struct svc_fh *current_fh = &cstate->current_fh;
3982 struct inode *ino = current_fh->fh_dentry->d_inode;
3983 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3984 struct file *file = NULL;
3990 if (grace_disallows_io(net, ino))
3991 return nfserr_grace;
3993 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3994 return check_special_stateids(net, current_fh, stateid, flags);
3998 status = nfsd4_lookup_stateid(cstate, stateid,
3999 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
4003 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
4006 switch (s->sc_type) {
4007 case NFS4_DELEG_STID:
4008 dp = delegstateid(s);
4009 status = nfs4_check_delegmode(dp, flags);
4013 file = dp->dl_file->fi_deleg_file;
4016 status = nfserr_serverfault;
4022 case NFS4_OPEN_STID:
4023 case NFS4_LOCK_STID:
4024 stp = openlockstateid(s);
4025 status = nfs4_check_fh(current_fh, stp);
4028 if (stp->st_stateowner->so_is_open_owner
4029 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4031 status = nfs4_check_openmode(stp, flags);
4035 if (flags & RD_STATE)
4036 file = find_readable_file(stp->st_file);
4038 file = find_writeable_file(stp->st_file);
4042 status = nfserr_bad_stateid;
4049 nfs4_unlock_state();
4054 nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
4056 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
4058 if (check_for_locks(stp->st_file, lo))
4059 return nfserr_locks_held;
4060 release_lockowner_if_empty(lo);
4065 * Test if the stateid is valid
4068 nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4069 struct nfsd4_test_stateid *test_stateid)
4071 struct nfsd4_test_stateid_id *stateid;
4072 struct nfs4_client *cl = cstate->session->se_client;
4075 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
4076 stateid->ts_id_status =
4077 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
4078 nfs4_unlock_state();
4084 nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4085 struct nfsd4_free_stateid *free_stateid)
4087 stateid_t *stateid = &free_stateid->fr_stateid;
4088 struct nfs4_stid *s;
4089 struct nfs4_delegation *dp;
4090 struct nfs4_client *cl = cstate->session->se_client;
4091 __be32 ret = nfserr_bad_stateid;
4094 s = find_stateid(cl, stateid);
4097 switch (s->sc_type) {
4098 case NFS4_DELEG_STID:
4099 ret = nfserr_locks_held;
4101 case NFS4_OPEN_STID:
4102 case NFS4_LOCK_STID:
4103 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4106 if (s->sc_type == NFS4_LOCK_STID)
4107 ret = nfsd4_free_lock_stateid(openlockstateid(s));
4109 ret = nfserr_locks_held;
4111 case NFS4_REVOKED_DELEG_STID:
4112 dp = delegstateid(s);
4113 destroy_revoked_delegation(dp);
4117 ret = nfserr_bad_stateid;
4120 nfs4_unlock_state();
4127 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
4128 RD_STATE : WR_STATE;
4131 static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
4133 struct svc_fh *current_fh = &cstate->current_fh;
4134 struct nfs4_stateowner *sop = stp->st_stateowner;
4137 status = nfsd4_check_seqid(cstate, sop, seqid);
4140 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
4141 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
4143 * "Closed" stateid's exist *only* to return
4144 * nfserr_replay_me from the previous step, and
4145 * revoked delegations are kept only for free_stateid.
4147 return nfserr_bad_stateid;
4148 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
4151 return nfs4_check_fh(current_fh, stp);
4155 * Checks for sequence id mutating operations.
4158 nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4159 stateid_t *stateid, char typemask,
4160 struct nfs4_ol_stateid **stpp,
4161 struct nfsd_net *nn)
4164 struct nfs4_stid *s;
4165 struct nfs4_ol_stateid *stp = NULL;
4167 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
4168 seqid, STATEID_VAL(stateid));
4171 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
4174 stp = openlockstateid(s);
4175 if (!nfsd4_has_session(cstate))
4176 cstate->replay_owner = stp->st_stateowner;
4178 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
4184 static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4185 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
4188 struct nfs4_openowner *oo;
4190 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
4191 NFS4_OPEN_STID, stpp, nn);
4194 oo = openowner((*stpp)->st_stateowner);
4195 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
4196 return nfserr_bad_stateid;
4201 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4202 struct nfsd4_open_confirm *oc)
4205 struct nfs4_openowner *oo;
4206 struct nfs4_ol_stateid *stp;
4207 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4209 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4210 cstate->current_fh.fh_dentry);
4212 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
4218 status = nfs4_preprocess_seqid_op(cstate,
4219 oc->oc_seqid, &oc->oc_req_stateid,
4220 NFS4_OPEN_STID, &stp, nn);
4223 oo = openowner(stp->st_stateowner);
4224 status = nfserr_bad_stateid;
4225 if (oo->oo_flags & NFS4_OO_CONFIRMED)
4227 oo->oo_flags |= NFS4_OO_CONFIRMED;
4228 update_stateid(&stp->st_stid.sc_stateid);
4229 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4230 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
4231 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
4233 nfsd4_client_record_create(oo->oo_owner.so_client);
4236 nfsd4_bump_seqid(cstate, status);
4237 if (!cstate->replay_owner)
4238 nfs4_unlock_state();
4242 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
4244 if (!test_access(access, stp))
4246 nfs4_file_put_access(stp->st_file, access);
4247 clear_access(access, stp);
4250 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
4252 switch (to_access) {
4253 case NFS4_SHARE_ACCESS_READ:
4254 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
4255 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4257 case NFS4_SHARE_ACCESS_WRITE:
4258 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
4259 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4261 case NFS4_SHARE_ACCESS_BOTH:
4269 reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
4273 for (i = 1; i < 4; i++) {
4274 if ((i & deny) != i)
4280 nfsd4_open_downgrade(struct svc_rqst *rqstp,
4281 struct nfsd4_compound_state *cstate,
4282 struct nfsd4_open_downgrade *od)
4285 struct nfs4_ol_stateid *stp;
4286 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4288 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4289 cstate->current_fh.fh_dentry);
4291 /* We don't yet support WANT bits: */
4292 if (od->od_deleg_want)
4293 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
4297 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
4298 &od->od_stateid, &stp, nn);
4301 status = nfserr_inval;
4302 if (!test_access(od->od_share_access, stp)) {
4303 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
4304 stp->st_access_bmap, od->od_share_access);
4307 if (!test_deny(od->od_share_deny, stp)) {
4308 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
4309 stp->st_deny_bmap, od->od_share_deny);
4312 nfs4_stateid_downgrade(stp, od->od_share_access);
4314 reset_union_bmap_deny(od->od_share_deny, stp);
4316 update_stateid(&stp->st_stid.sc_stateid);
4317 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4320 nfsd4_bump_seqid(cstate, status);
4321 if (!cstate->replay_owner)
4322 nfs4_unlock_state();
4326 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4328 struct nfs4_client *clp = s->st_stid.sc_client;
4329 struct nfs4_openowner *oo = openowner(s->st_stateowner);
4331 s->st_stid.sc_type = NFS4_CLOSED_STID;
4332 unhash_open_stateid(s);
4334 if (clp->cl_minorversion) {
4335 free_generic_stateid(s);
4336 if (list_empty(&oo->oo_owner.so_stateids))
4337 release_openowner(oo);
4339 oo->oo_last_closed_stid = s;
4341 * In the 4.0 case we need to keep the owners around a
4342 * little while to handle CLOSE replay.
4344 if (list_empty(&oo->oo_owner.so_stateids))
4345 move_to_close_lru(oo, clp->net);
4350 * nfs4_unlock_state() called after encode
4353 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4354 struct nfsd4_close *close)
4357 struct nfs4_ol_stateid *stp;
4358 struct net *net = SVC_NET(rqstp);
4359 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4361 dprintk("NFSD: nfsd4_close on file %pd\n",
4362 cstate->current_fh.fh_dentry);
4365 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
4367 NFS4_OPEN_STID|NFS4_CLOSED_STID,
4369 nfsd4_bump_seqid(cstate, status);
4372 update_stateid(&stp->st_stid.sc_stateid);
4373 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4375 nfsd4_close_open_stateid(stp);
4377 if (!cstate->replay_owner)
4378 nfs4_unlock_state();
4383 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4384 struct nfsd4_delegreturn *dr)
4386 struct nfs4_delegation *dp;
4387 stateid_t *stateid = &dr->dr_stateid;
4388 struct nfs4_stid *s;
4390 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4392 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4396 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
4399 dp = delegstateid(s);
4400 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
4404 destroy_delegation(dp);
4406 nfs4_unlock_state();
4412 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4415 end_offset(u64 start, u64 len)
4420 return end >= start ? end: NFS4_MAX_UINT64;
4423 /* last octet in a range */
4425 last_byte_offset(u64 start, u64 len)
4431 return end > start ? end - 1: NFS4_MAX_UINT64;
4435 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4436 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4437 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4438 * locking, this prevents us from being completely protocol-compliant. The
4439 * real solution to this problem is to start using unsigned file offsets in
4440 * the VFS, but this is a very deep change!
4443 nfs4_transform_lock_offset(struct file_lock *lock)
4445 if (lock->fl_start < 0)
4446 lock->fl_start = OFFSET_MAX;
4447 if (lock->fl_end < 0)
4448 lock->fl_end = OFFSET_MAX;
4451 /* Hack!: For now, we're defining this just so we can use a pointer to it
4452 * as a unique cookie to identify our (NFSv4's) posix locks. */
4453 static const struct lock_manager_operations nfsd_posix_mng_ops = {
4457 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
4459 struct nfs4_lockowner *lo;
4461 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
4462 lo = (struct nfs4_lockowner *) fl->fl_owner;
4463 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
4464 lo->lo_owner.so_owner.len, GFP_KERNEL);
4465 if (!deny->ld_owner.data)
4466 /* We just don't care that much */
4468 deny->ld_owner.len = lo->lo_owner.so_owner.len;
4469 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
4472 deny->ld_owner.len = 0;
4473 deny->ld_owner.data = NULL;
4474 deny->ld_clientid.cl_boot = 0;
4475 deny->ld_clientid.cl_id = 0;
4477 deny->ld_start = fl->fl_start;
4478 deny->ld_length = NFS4_MAX_UINT64;
4479 if (fl->fl_end != NFS4_MAX_UINT64)
4480 deny->ld_length = fl->fl_end - fl->fl_start + 1;
4481 deny->ld_type = NFS4_READ_LT;
4482 if (fl->fl_type != F_RDLCK)
4483 deny->ld_type = NFS4_WRITE_LT;
4486 static struct nfs4_lockowner *
4487 find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
4488 struct nfsd_net *nn)
4490 unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner);
4491 struct nfs4_stateowner *so;
4493 list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) {
4494 if (so->so_is_open_owner)
4496 if (!same_owner_str(so, owner, clid))
4498 return lockowner(so);
4504 * Alloc a lock owner structure.
4505 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4508 * strhashval = ownerstr_hashval
4510 static struct nfs4_lockowner *
4511 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) {
4512 struct nfs4_lockowner *lo;
4513 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
4515 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
4518 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
4519 lo->lo_owner.so_is_open_owner = 0;
4520 /* It is the openowner seqid that will be incremented in encode in the
4521 * case of new lockowners; so increment the lock seqid manually: */
4522 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
4523 list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
4527 static struct nfs4_ol_stateid *
4528 alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
4530 struct nfs4_ol_stateid *stp;
4531 struct nfs4_client *clp = lo->lo_owner.so_client;
4533 stp = nfs4_alloc_stateid(clp);
4536 stp->st_stid.sc_type = NFS4_LOCK_STID;
4537 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
4538 stp->st_stateowner = &lo->lo_owner;
4541 stp->st_access_bmap = 0;
4542 stp->st_deny_bmap = open_stp->st_deny_bmap;
4543 stp->st_openstp = open_stp;
4544 list_add(&stp->st_locks, &open_stp->st_locks);
4545 spin_lock(&fp->fi_lock);
4546 list_add(&stp->st_perfile, &fp->fi_stateids);
4547 spin_unlock(&fp->fi_lock);
4551 static struct nfs4_ol_stateid *
4552 find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
4554 struct nfs4_ol_stateid *lst;
4556 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
4557 if (lst->st_file == fp)
4565 check_lock_length(u64 offset, u64 length)
4567 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
4568 LOFF_OVERFLOW(offset, length)));
4571 static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
4573 struct nfs4_file *fp = lock_stp->st_file;
4575 if (test_access(access, lock_stp))
4577 __nfs4_file_get_access(fp, access);
4578 set_access(access, lock_stp);
4581 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)
4583 struct nfs4_file *fi = ost->st_file;
4584 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4585 struct nfs4_client *cl = oo->oo_owner.so_client;
4586 struct nfs4_lockowner *lo;
4587 unsigned int strhashval;
4588 struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
4590 lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn);
4592 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
4593 &lock->v.new.owner);
4594 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4596 return nfserr_jukebox;
4598 /* with an existing lockowner, seqids must be the same */
4599 if (!cstate->minorversion &&
4600 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
4601 return nfserr_bad_seqid;
4604 *lst = find_lock_stateid(lo, fi);
4606 *lst = alloc_init_lock_stateid(lo, fi, ost);
4608 release_lockowner_if_empty(lo);
4609 return nfserr_jukebox;
4620 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4621 struct nfsd4_lock *lock)
4623 struct nfs4_openowner *open_sop = NULL;
4624 struct nfs4_lockowner *lock_sop = NULL;
4625 struct nfs4_ol_stateid *lock_stp;
4626 struct file *filp = NULL;
4627 struct file_lock *file_lock = NULL;
4628 struct file_lock *conflock = NULL;
4630 bool new_state = false;
4633 struct net *net = SVC_NET(rqstp);
4634 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4636 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4637 (long long) lock->lk_offset,
4638 (long long) lock->lk_length);
4640 if (check_lock_length(lock->lk_offset, lock->lk_length))
4641 return nfserr_inval;
4643 if ((status = fh_verify(rqstp, &cstate->current_fh,
4644 S_IFREG, NFSD_MAY_LOCK))) {
4645 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4651 if (lock->lk_is_new) {
4652 struct nfs4_ol_stateid *open_stp = NULL;
4654 if (nfsd4_has_session(cstate))
4655 /* See rfc 5661 18.10.3: given clientid is ignored: */
4656 memcpy(&lock->v.new.clientid,
4657 &cstate->session->se_client->cl_clientid,
4658 sizeof(clientid_t));
4660 status = nfserr_stale_clientid;
4661 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
4664 /* validate and update open stateid and open seqid */
4665 status = nfs4_preprocess_confirmed_seqid_op(cstate,
4666 lock->lk_new_open_seqid,
4667 &lock->lk_new_open_stateid,
4671 open_sop = openowner(open_stp->st_stateowner);
4672 status = nfserr_bad_stateid;
4673 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
4674 &lock->v.new.clientid))
4676 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4677 &lock_stp, &new_state);
4679 status = nfs4_preprocess_seqid_op(cstate,
4680 lock->lk_old_lock_seqid,
4681 &lock->lk_old_lock_stateid,
4682 NFS4_LOCK_STID, &lock_stp, nn);
4685 lock_sop = lockowner(lock_stp->st_stateowner);
4687 lkflg = setlkflg(lock->lk_type);
4688 status = nfs4_check_openmode(lock_stp, lkflg);
4692 status = nfserr_grace;
4693 if (locks_in_grace(net) && !lock->lk_reclaim)
4695 status = nfserr_no_grace;
4696 if (!locks_in_grace(net) && lock->lk_reclaim)
4699 file_lock = locks_alloc_lock();
4701 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4702 status = nfserr_jukebox;
4706 locks_init_lock(file_lock);
4707 switch (lock->lk_type) {
4710 filp = find_readable_file(lock_stp->st_file);
4712 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
4713 file_lock->fl_type = F_RDLCK;
4716 case NFS4_WRITEW_LT:
4717 filp = find_writeable_file(lock_stp->st_file);
4719 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
4720 file_lock->fl_type = F_WRLCK;
4723 status = nfserr_inval;
4727 status = nfserr_openmode;
4730 file_lock->fl_owner = (fl_owner_t)lock_sop;
4731 file_lock->fl_pid = current->tgid;
4732 file_lock->fl_file = filp;
4733 file_lock->fl_flags = FL_POSIX;
4734 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4735 file_lock->fl_start = lock->lk_offset;
4736 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4737 nfs4_transform_lock_offset(file_lock);
4739 conflock = locks_alloc_lock();
4741 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4742 status = nfserr_jukebox;
4746 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
4748 case 0: /* success! */
4749 update_stateid(&lock_stp->st_stid.sc_stateid);
4750 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
4754 case (EAGAIN): /* conflock holds conflicting lock */
4755 status = nfserr_denied;
4756 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4757 nfs4_set_lock_denied(conflock, &lock->lk_denied);
4760 status = nfserr_deadlock;
4763 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
4764 status = nfserrno(err);
4770 if (status && new_state)
4771 release_lock_stateid(lock_stp);
4772 nfsd4_bump_seqid(cstate, status);
4773 if (!cstate->replay_owner)
4774 nfs4_unlock_state();
4776 locks_free_lock(file_lock);
4778 locks_free_lock(conflock);
4783 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4784 * so we do a temporary open here just to get an open file to pass to
4785 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4788 static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
4791 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4793 err = nfserrno(vfs_test_lock(file, lock));
4803 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4804 struct nfsd4_lockt *lockt)
4806 struct file_lock *file_lock = NULL;
4807 struct nfs4_lockowner *lo;
4809 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4811 if (locks_in_grace(SVC_NET(rqstp)))
4812 return nfserr_grace;
4814 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4815 return nfserr_inval;
4819 if (!nfsd4_has_session(cstate)) {
4820 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
4825 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4828 file_lock = locks_alloc_lock();
4830 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4831 status = nfserr_jukebox;
4834 locks_init_lock(file_lock);
4835 switch (lockt->lt_type) {
4838 file_lock->fl_type = F_RDLCK;
4841 case NFS4_WRITEW_LT:
4842 file_lock->fl_type = F_WRLCK;
4845 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4846 status = nfserr_inval;
4850 lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn);
4852 file_lock->fl_owner = (fl_owner_t)lo;
4853 file_lock->fl_pid = current->tgid;
4854 file_lock->fl_flags = FL_POSIX;
4856 file_lock->fl_start = lockt->lt_offset;
4857 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
4859 nfs4_transform_lock_offset(file_lock);
4861 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
4865 if (file_lock->fl_type != F_UNLCK) {
4866 status = nfserr_denied;
4867 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
4870 nfs4_unlock_state();
4872 locks_free_lock(file_lock);
4877 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4878 struct nfsd4_locku *locku)
4880 struct nfs4_ol_stateid *stp;
4881 struct file *filp = NULL;
4882 struct file_lock *file_lock = NULL;
4885 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4887 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4888 (long long) locku->lu_offset,
4889 (long long) locku->lu_length);
4891 if (check_lock_length(locku->lu_offset, locku->lu_length))
4892 return nfserr_inval;
4896 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
4897 &locku->lu_stateid, NFS4_LOCK_STID,
4901 filp = find_any_file(stp->st_file);
4903 status = nfserr_lock_range;
4906 file_lock = locks_alloc_lock();
4908 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4909 status = nfserr_jukebox;
4912 locks_init_lock(file_lock);
4913 file_lock->fl_type = F_UNLCK;
4914 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
4915 file_lock->fl_pid = current->tgid;
4916 file_lock->fl_file = filp;
4917 file_lock->fl_flags = FL_POSIX;
4918 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4919 file_lock->fl_start = locku->lu_offset;
4921 file_lock->fl_end = last_byte_offset(locku->lu_offset,
4923 nfs4_transform_lock_offset(file_lock);
4925 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
4927 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4930 update_stateid(&stp->st_stid.sc_stateid);
4931 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4935 nfsd4_bump_seqid(cstate, status);
4936 if (!cstate->replay_owner)
4937 nfs4_unlock_state();
4939 locks_free_lock(file_lock);
4943 status = nfserrno(err);
4949 * 1: locks held by lockowner
4950 * 0: no locks held by lockowner
4953 check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
4955 struct file_lock **flpp;
4956 struct inode *inode = filp->fi_inode;
4959 spin_lock(&inode->i_lock);
4960 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
4961 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
4967 spin_unlock(&inode->i_lock);
4972 nfsd4_release_lockowner(struct svc_rqst *rqstp,
4973 struct nfsd4_compound_state *cstate,
4974 struct nfsd4_release_lockowner *rlockowner)
4976 clientid_t *clid = &rlockowner->rl_clientid;
4977 struct nfs4_stateowner *sop = NULL, *tmp;
4978 struct nfs4_lockowner *lo;
4979 struct nfs4_ol_stateid *stp;
4980 struct xdr_netobj *owner = &rlockowner->rl_owner;
4981 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
4983 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4985 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4986 clid->cl_boot, clid->cl_id);
4990 status = lookup_clientid(clid, cstate, nn);
4994 status = nfserr_locks_held;
4996 /* Find the matching lock stateowner */
4997 list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) {
4998 if (tmp->so_is_open_owner)
5000 if (same_owner_str(tmp, owner, clid)) {
5006 /* No matching owner found, maybe a replay? Just declare victory... */
5012 lo = lockowner(sop);
5013 /* see if there are still any locks associated with it */
5014 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
5015 if (check_for_locks(stp->st_file, lo))
5020 release_lockowner(lo);
5022 nfs4_unlock_state();
5026 static inline struct nfs4_client_reclaim *
5029 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
5033 nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
5035 struct nfs4_client_reclaim *crp;
5037 crp = nfsd4_find_reclaim_client(name, nn);
5038 return (crp && crp->cr_clp);
5042 * failure => all reset bets are off, nfserr_no_grace...
5044 struct nfs4_client_reclaim *
5045 nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
5047 unsigned int strhashval;
5048 struct nfs4_client_reclaim *crp;
5050 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
5051 crp = alloc_reclaim();
5053 strhashval = clientstr_hashval(name);
5054 INIT_LIST_HEAD(&crp->cr_strhash);
5055 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
5056 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
5058 nn->reclaim_str_hashtbl_size++;
5064 nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
5066 list_del(&crp->cr_strhash);
5068 nn->reclaim_str_hashtbl_size--;
5072 nfs4_release_reclaim(struct nfsd_net *nn)
5074 struct nfs4_client_reclaim *crp = NULL;
5077 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5078 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
5079 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
5080 struct nfs4_client_reclaim, cr_strhash);
5081 nfs4_remove_reclaim_record(crp, nn);
5084 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
5088 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
5089 struct nfs4_client_reclaim *
5090 nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
5092 unsigned int strhashval;
5093 struct nfs4_client_reclaim *crp = NULL;
5095 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
5097 strhashval = clientstr_hashval(recdir);
5098 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
5099 if (same_name(crp->cr_recdir, recdir)) {
5107 * Called from OPEN. Look for clientid in reclaim list.
5110 nfs4_check_open_reclaim(clientid_t *clid,
5111 struct nfsd4_compound_state *cstate,
5112 struct nfsd_net *nn)
5116 /* find clientid in conf_id_hashtbl */
5117 status = lookup_clientid(clid, cstate, nn);
5119 return nfserr_reclaim_bad;
5121 if (nfsd4_client_record_check(cstate->clp))
5122 return nfserr_reclaim_bad;
5127 #ifdef CONFIG_NFSD_FAULT_INJECTION
5129 u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
5131 if (mark_client_expired(clp))
5137 u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
5139 char buf[INET6_ADDRSTRLEN];
5140 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5141 printk(KERN_INFO "NFS Client: %s\n", buf);
5145 static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
5148 char buf[INET6_ADDRSTRLEN];
5149 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5150 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
5153 static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
5154 void (*func)(struct nfs4_ol_stateid *))
5156 struct nfs4_openowner *oop;
5157 struct nfs4_ol_stateid *stp, *st_next;
5158 struct nfs4_ol_stateid *lst, *lst_next;
5161 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
5162 list_for_each_entry_safe(stp, st_next,
5163 &oop->oo_owner.so_stateids, st_perstateowner) {
5164 list_for_each_entry_safe(lst, lst_next,
5165 &stp->st_locks, st_locks) {
5177 u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
5179 return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
5182 u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
5184 u64 count = nfsd_foreach_client_lock(clp, max, NULL);
5185 nfsd_print_count(clp, count, "locked files");
5189 static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
5191 struct nfs4_openowner *oop, *next;
5194 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
5204 u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
5206 return nfsd_foreach_client_open(clp, max, release_openowner);
5209 u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
5211 u64 count = nfsd_foreach_client_open(clp, max, NULL);
5212 nfsd_print_count(clp, count, "open files");
5216 static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
5217 struct list_head *victims)
5219 struct nfs4_delegation *dp, *next;
5222 lockdep_assert_held(&state_lock);
5223 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
5226 * It's not safe to mess with delegations that have a
5227 * non-zero dl_time. They might have already been broken
5228 * and could be processed by the laundromat outside of
5229 * the state_lock. Just leave them be.
5231 if (dp->dl_time != 0)
5235 * Increment dl_time to ensure that delegation breaks
5236 * don't monkey with it now that we are.
5239 list_move(&dp->dl_recall_lru, victims);
5247 u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
5249 struct nfs4_delegation *dp, *next;
5253 spin_lock(&state_lock);
5254 count = nfsd_find_all_delegations(clp, max, &victims);
5255 spin_unlock(&state_lock);
5257 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
5258 revoke_delegation(dp);
5263 u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
5265 struct nfs4_delegation *dp;
5269 spin_lock(&state_lock);
5270 count = nfsd_find_all_delegations(clp, max, &victims);
5271 while (!list_empty(&victims)) {
5272 dp = list_first_entry(&victims, struct nfs4_delegation,
5274 list_del_init(&dp->dl_recall_lru);
5276 nfsd_break_one_deleg(dp);
5278 spin_unlock(&state_lock);
5283 u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
5287 spin_lock(&state_lock);
5288 count = nfsd_find_all_delegations(clp, max, NULL);
5289 spin_unlock(&state_lock);
5291 nfsd_print_count(clp, count, "delegations");
5295 u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
5297 struct nfs4_client *clp, *next;
5299 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5301 if (!nfsd_netns_ready(nn))
5304 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
5305 count += func(clp, max - count);
5306 if ((max != 0) && (count >= max))
5313 struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
5315 struct nfs4_client *clp;
5316 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5318 if (!nfsd_netns_ready(nn))
5321 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
5322 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
5328 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5331 * Since the lifetime of a delegation isn't limited to that of an open, a
5332 * client may quite reasonably hang on to a delegation as long as it has
5333 * the inode cached. This becomes an obvious problem the first time a
5334 * client's inode cache approaches the size of the server's total memory.
5336 * For now we avoid this problem by imposing a hard limit on the number
5337 * of delegations, which varies according to the server's memory size.
5340 set_max_delegations(void)
5343 * Allow at most 4 delegations per megabyte of RAM. Quick
5344 * estimates suggest that in the worst case (where every delegation
5345 * is for a different inode), a delegation could take about 1.5K,
5346 * giving a worst case usage of about 6% of memory.
5348 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
5351 static int nfs4_state_create_net(struct net *net)
5353 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5356 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5357 CLIENT_HASH_SIZE, GFP_KERNEL);
5358 if (!nn->conf_id_hashtbl)
5360 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5361 CLIENT_HASH_SIZE, GFP_KERNEL);
5362 if (!nn->unconf_id_hashtbl)
5364 nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
5365 OWNER_HASH_SIZE, GFP_KERNEL);
5366 if (!nn->ownerstr_hashtbl)
5368 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
5369 SESSION_HASH_SIZE, GFP_KERNEL);
5370 if (!nn->sessionid_hashtbl)
5373 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5374 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
5375 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
5377 for (i = 0; i < OWNER_HASH_SIZE; i++)
5378 INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
5379 for (i = 0; i < SESSION_HASH_SIZE; i++)
5380 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
5381 nn->conf_name_tree = RB_ROOT;
5382 nn->unconf_name_tree = RB_ROOT;
5383 INIT_LIST_HEAD(&nn->client_lru);
5384 INIT_LIST_HEAD(&nn->close_lru);
5385 INIT_LIST_HEAD(&nn->del_recall_lru);
5386 spin_lock_init(&nn->client_lock);
5388 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
5394 kfree(nn->ownerstr_hashtbl);
5396 kfree(nn->unconf_id_hashtbl);
5398 kfree(nn->conf_id_hashtbl);
5404 nfs4_state_destroy_net(struct net *net)
5407 struct nfs4_client *clp = NULL;
5408 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5410 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5411 while (!list_empty(&nn->conf_id_hashtbl[i])) {
5412 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5413 destroy_client(clp);
5417 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5418 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
5419 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5420 destroy_client(clp);
5424 kfree(nn->sessionid_hashtbl);
5425 kfree(nn->ownerstr_hashtbl);
5426 kfree(nn->unconf_id_hashtbl);
5427 kfree(nn->conf_id_hashtbl);
5432 nfs4_state_start_net(struct net *net)
5434 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5437 ret = nfs4_state_create_net(net);
5440 nfsd4_client_tracking_init(net);
5441 nn->boot_time = get_seconds();
5442 locks_start_grace(net, &nn->nfsd4_manager);
5443 nn->grace_ended = false;
5444 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
5445 nn->nfsd4_grace, net);
5446 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
5450 /* initialization to perform when the nfsd service is started: */
5453 nfs4_state_start(void)
5457 ret = set_callback_cred();
5460 laundry_wq = create_singlethread_workqueue("nfsd4");
5461 if (laundry_wq == NULL) {
5465 ret = nfsd4_create_callback_queue();
5467 goto out_free_laundry;
5469 set_max_delegations();
5474 destroy_workqueue(laundry_wq);
5480 nfs4_state_shutdown_net(struct net *net)
5482 struct nfs4_delegation *dp = NULL;
5483 struct list_head *pos, *next, reaplist;
5484 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5486 cancel_delayed_work_sync(&nn->laundromat_work);
5487 locks_end_grace(&nn->nfsd4_manager);
5490 INIT_LIST_HEAD(&reaplist);
5491 spin_lock(&state_lock);
5492 list_for_each_safe(pos, next, &nn->del_recall_lru) {
5493 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5494 list_move(&dp->dl_recall_lru, &reaplist);
5496 spin_unlock(&state_lock);
5497 list_for_each_safe(pos, next, &reaplist) {
5498 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5499 destroy_delegation(dp);
5502 nfsd4_client_tracking_exit(net);
5503 nfs4_state_destroy_net(net);
5504 nfs4_unlock_state();
5508 nfs4_state_shutdown(void)
5510 destroy_workqueue(laundry_wq);
5511 nfsd4_destroy_callback_queue();
5515 get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5517 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
5518 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
5522 put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5524 if (cstate->minorversion) {
5525 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
5526 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5531 clear_current_stateid(struct nfsd4_compound_state *cstate)
5533 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5537 * functions to set current state id
5540 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5542 put_stateid(cstate, &odp->od_stateid);
5546 nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
5548 put_stateid(cstate, &open->op_stateid);
5552 nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5554 put_stateid(cstate, &close->cl_stateid);
5558 nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
5560 put_stateid(cstate, &lock->lk_resp_stateid);
5564 * functions to consume current state id
5568 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5570 get_stateid(cstate, &odp->od_stateid);
5574 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
5576 get_stateid(cstate, &drp->dr_stateid);
5580 nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
5582 get_stateid(cstate, &fsp->fr_stateid);
5586 nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
5588 get_stateid(cstate, &setattr->sa_stateid);
5592 nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5594 get_stateid(cstate, &close->cl_stateid);
5598 nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
5600 get_stateid(cstate, &locku->lu_stateid);
5604 nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
5606 get_stateid(cstate, &read->rd_stateid);
5610 nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
5612 get_stateid(cstate, &write->wr_stateid);