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 might_lock(&state_lock);
259 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
260 hlist_del(&fi->fi_hash);
261 spin_unlock(&state_lock);
268 get_nfs4_file(struct nfs4_file *fi)
270 atomic_inc(&fi->fi_ref);
274 __nfs4_get_fd(struct nfs4_file *f, int oflag)
276 if (f->fi_fds[oflag])
277 return get_file(f->fi_fds[oflag]);
282 find_writeable_file_locked(struct nfs4_file *f)
286 lockdep_assert_held(&f->fi_lock);
288 ret = __nfs4_get_fd(f, O_WRONLY);
290 ret = __nfs4_get_fd(f, O_RDWR);
295 find_writeable_file(struct nfs4_file *f)
299 spin_lock(&f->fi_lock);
300 ret = find_writeable_file_locked(f);
301 spin_unlock(&f->fi_lock);
306 static struct file *find_readable_file_locked(struct nfs4_file *f)
310 lockdep_assert_held(&f->fi_lock);
312 ret = __nfs4_get_fd(f, O_RDONLY);
314 ret = __nfs4_get_fd(f, O_RDWR);
319 find_readable_file(struct nfs4_file *f)
323 spin_lock(&f->fi_lock);
324 ret = find_readable_file_locked(f);
325 spin_unlock(&f->fi_lock);
331 find_any_file(struct nfs4_file *f)
335 spin_lock(&f->fi_lock);
336 ret = __nfs4_get_fd(f, O_RDWR);
338 ret = __nfs4_get_fd(f, O_WRONLY);
340 ret = __nfs4_get_fd(f, O_RDONLY);
342 spin_unlock(&f->fi_lock);
346 static int num_delegations;
347 unsigned long max_delegations;
350 * Open owner state (share locks)
353 /* hash tables for lock and open owners */
354 #define OWNER_HASH_BITS 8
355 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
356 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
358 static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
362 ret = opaque_hashval(ownername->data, ownername->len);
364 return ret & OWNER_HASH_MASK;
367 /* hash table for nfs4_file */
368 #define FILE_HASH_BITS 8
369 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
371 static unsigned int file_hashval(struct inode *ino)
373 /* XXX: why are we hashing on inode pointer, anyway? */
374 return hash_ptr(ino, FILE_HASH_BITS);
377 static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
380 __nfs4_file_get_access(struct nfs4_file *fp, u32 access)
382 lockdep_assert_held(&fp->fi_lock);
384 if (access & NFS4_SHARE_ACCESS_WRITE)
385 atomic_inc(&fp->fi_access[O_WRONLY]);
386 if (access & NFS4_SHARE_ACCESS_READ)
387 atomic_inc(&fp->fi_access[O_RDONLY]);
391 nfs4_file_get_access(struct nfs4_file *fp, u32 access)
393 lockdep_assert_held(&fp->fi_lock);
395 /* Does this access mode make sense? */
396 if (access & ~NFS4_SHARE_ACCESS_BOTH)
399 /* Does it conflict with a deny mode already set? */
400 if ((access & fp->fi_share_deny) != 0)
401 return nfserr_share_denied;
403 __nfs4_file_get_access(fp, access);
407 static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
409 /* Common case is that there is no deny mode. */
411 /* Does this deny mode make sense? */
412 if (deny & ~NFS4_SHARE_DENY_BOTH)
415 if ((deny & NFS4_SHARE_DENY_READ) &&
416 atomic_read(&fp->fi_access[O_RDONLY]))
417 return nfserr_share_denied;
419 if ((deny & NFS4_SHARE_DENY_WRITE) &&
420 atomic_read(&fp->fi_access[O_WRONLY]))
421 return nfserr_share_denied;
426 static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
428 might_lock(&fp->fi_lock);
430 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
431 struct file *f1 = NULL;
432 struct file *f2 = NULL;
434 swap(f1, fp->fi_fds[oflag]);
435 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
436 swap(f2, fp->fi_fds[O_RDWR]);
437 spin_unlock(&fp->fi_lock);
445 static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
447 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
449 if (access & NFS4_SHARE_ACCESS_WRITE)
450 __nfs4_file_put_access(fp, O_WRONLY);
451 if (access & NFS4_SHARE_ACCESS_READ)
452 __nfs4_file_put_access(fp, O_RDONLY);
455 static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
458 struct idr *stateids = &cl->cl_stateids;
459 struct nfs4_stid *stid;
462 stid = kmem_cache_alloc(slab, GFP_KERNEL);
466 new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL);
469 stid->sc_client = cl;
471 stid->sc_stateid.si_opaque.so_id = new_id;
472 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
473 /* Will be incremented before return to client: */
474 stid->sc_stateid.si_generation = 0;
477 * It shouldn't be a problem to reuse an opaque stateid value.
478 * I don't think it is for 4.1. But with 4.0 I worry that, for
479 * example, a stray write retransmission could be accepted by
480 * the server when it should have been rejected. Therefore,
481 * adopt a trick from the sctp code to attempt to maximize the
482 * amount of time until an id is reused, by ensuring they always
483 * "increase" (mod INT_MAX):
487 kmem_cache_free(slab, stid);
491 static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
493 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
497 * When we recall a delegation, we should be careful not to hand it
498 * out again straight away.
499 * To ensure this we keep a pair of bloom filters ('new' and 'old')
500 * in which the filehandles of recalled delegations are "stored".
501 * If a filehandle appear in either filter, a delegation is blocked.
502 * When a delegation is recalled, the filehandle is stored in the "new"
504 * Every 30 seconds we swap the filters and clear the "new" one,
505 * unless both are empty of course.
507 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
508 * low 3 bytes as hash-table indices.
510 * 'state_lock', which is always held when block_delegations() is called,
511 * is used to manage concurrent access. Testing does not need the lock
512 * except when swapping the two filters.
514 static struct bloom_pair {
515 int entries, old_entries;
517 int new; /* index into 'set' */
518 DECLARE_BITMAP(set[2], 256);
519 } blocked_delegations;
521 static int delegation_blocked(struct knfsd_fh *fh)
524 struct bloom_pair *bd = &blocked_delegations;
526 if (bd->entries == 0)
528 if (seconds_since_boot() - bd->swap_time > 30) {
529 spin_lock(&state_lock);
530 if (seconds_since_boot() - bd->swap_time > 30) {
531 bd->entries -= bd->old_entries;
532 bd->old_entries = bd->entries;
533 memset(bd->set[bd->new], 0,
536 bd->swap_time = seconds_since_boot();
538 spin_unlock(&state_lock);
540 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
541 if (test_bit(hash&255, bd->set[0]) &&
542 test_bit((hash>>8)&255, bd->set[0]) &&
543 test_bit((hash>>16)&255, bd->set[0]))
546 if (test_bit(hash&255, bd->set[1]) &&
547 test_bit((hash>>8)&255, bd->set[1]) &&
548 test_bit((hash>>16)&255, bd->set[1]))
554 static void block_delegations(struct knfsd_fh *fh)
557 struct bloom_pair *bd = &blocked_delegations;
559 lockdep_assert_held(&state_lock);
561 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
563 __set_bit(hash&255, bd->set[bd->new]);
564 __set_bit((hash>>8)&255, bd->set[bd->new]);
565 __set_bit((hash>>16)&255, bd->set[bd->new]);
566 if (bd->entries == 0)
567 bd->swap_time = seconds_since_boot();
571 static struct nfs4_delegation *
572 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh)
574 struct nfs4_delegation *dp;
576 dprintk("NFSD alloc_init_deleg\n");
577 if (num_delegations > max_delegations)
579 if (delegation_blocked(¤t_fh->fh_handle))
581 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
585 * delegation seqid's are never incremented. The 4.1 special
586 * meaning of seqid 0 isn't meaningful, really, but let's avoid
587 * 0 anyway just for consistency and use 1:
589 dp->dl_stid.sc_stateid.si_generation = 1;
591 INIT_LIST_HEAD(&dp->dl_perfile);
592 INIT_LIST_HEAD(&dp->dl_perclnt);
593 INIT_LIST_HEAD(&dp->dl_recall_lru);
595 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
596 fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle);
598 atomic_set(&dp->dl_count, 1);
599 INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall);
603 static void remove_stid(struct nfs4_stid *s)
605 struct idr *stateids = &s->sc_client->cl_stateids;
607 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
610 static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
612 kmem_cache_free(slab, s);
616 nfs4_put_delegation(struct nfs4_delegation *dp)
618 if (atomic_dec_and_test(&dp->dl_count)) {
619 nfs4_free_stid(deleg_slab, &dp->dl_stid);
624 static void nfs4_put_deleg_lease(struct nfs4_file *fp)
628 if (atomic_dec_and_test(&fp->fi_delegees)) {
629 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
631 fput(fp->fi_deleg_file);
632 fp->fi_deleg_file = NULL;
636 static void unhash_stid(struct nfs4_stid *s)
642 hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
644 lockdep_assert_held(&state_lock);
646 dp->dl_stid.sc_type = NFS4_DELEG_STID;
647 spin_lock(&fp->fi_lock);
648 list_add(&dp->dl_perfile, &fp->fi_delegations);
649 spin_unlock(&fp->fi_lock);
650 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
653 /* Called under the state lock. */
655 unhash_delegation(struct nfs4_delegation *dp)
657 struct nfs4_file *fp = dp->dl_file;
659 spin_lock(&state_lock);
660 list_del_init(&dp->dl_perclnt);
661 list_del_init(&dp->dl_recall_lru);
662 spin_lock(&fp->fi_lock);
663 list_del_init(&dp->dl_perfile);
664 spin_unlock(&fp->fi_lock);
665 spin_unlock(&state_lock);
667 nfs4_put_deleg_lease(fp);
675 static void destroy_revoked_delegation(struct nfs4_delegation *dp)
677 list_del_init(&dp->dl_recall_lru);
678 remove_stid(&dp->dl_stid);
679 nfs4_put_delegation(dp);
682 static void destroy_delegation(struct nfs4_delegation *dp)
684 unhash_delegation(dp);
685 remove_stid(&dp->dl_stid);
686 nfs4_put_delegation(dp);
689 static void revoke_delegation(struct nfs4_delegation *dp)
691 struct nfs4_client *clp = dp->dl_stid.sc_client;
693 if (clp->cl_minorversion == 0)
694 destroy_delegation(dp);
696 unhash_delegation(dp);
697 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
698 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
706 static unsigned int clientid_hashval(u32 id)
708 return id & CLIENT_HASH_MASK;
711 static unsigned int clientstr_hashval(const char *name)
713 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
717 * We store the NONE, READ, WRITE, and BOTH bits separately in the
718 * st_{access,deny}_bmap field of the stateid, in order to track not
719 * only what share bits are currently in force, but also what
720 * combinations of share bits previous opens have used. This allows us
721 * to enforce the recommendation of rfc 3530 14.2.19 that the server
722 * return an error if the client attempt to downgrade to a combination
723 * of share bits not explicable by closing some of its previous opens.
725 * XXX: This enforcement is actually incomplete, since we don't keep
726 * track of access/deny bit combinations; so, e.g., we allow:
728 * OPEN allow read, deny write
729 * OPEN allow both, deny none
730 * DOWNGRADE allow read, deny none
732 * which we should reject.
735 bmap_to_share_mode(unsigned long bmap) {
737 unsigned int access = 0;
739 for (i = 1; i < 4; i++) {
740 if (test_bit(i, &bmap))
746 /* set share access for a given stateid */
748 set_access(u32 access, struct nfs4_ol_stateid *stp)
750 unsigned char mask = 1 << access;
752 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
753 stp->st_access_bmap |= mask;
756 /* clear share access for a given stateid */
758 clear_access(u32 access, struct nfs4_ol_stateid *stp)
760 unsigned char mask = 1 << access;
762 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
763 stp->st_access_bmap &= ~mask;
766 /* test whether a given stateid has access */
768 test_access(u32 access, struct nfs4_ol_stateid *stp)
770 unsigned char mask = 1 << access;
772 return (bool)(stp->st_access_bmap & mask);
775 /* set share deny for a given stateid */
777 set_deny(u32 deny, struct nfs4_ol_stateid *stp)
779 unsigned char mask = 1 << deny;
781 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
782 stp->st_deny_bmap |= mask;
785 /* clear share deny for a given stateid */
787 clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
789 unsigned char mask = 1 << deny;
791 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
792 stp->st_deny_bmap &= ~mask;
795 /* test whether a given stateid is denying specific access */
797 test_deny(u32 deny, struct nfs4_ol_stateid *stp)
799 unsigned char mask = 1 << deny;
801 return (bool)(stp->st_deny_bmap & mask);
804 static int nfs4_access_to_omode(u32 access)
806 switch (access & NFS4_SHARE_ACCESS_BOTH) {
807 case NFS4_SHARE_ACCESS_READ:
809 case NFS4_SHARE_ACCESS_WRITE:
811 case NFS4_SHARE_ACCESS_BOTH:
819 * A stateid that had a deny mode associated with it is being released
820 * or downgraded. Recalculate the deny mode on the file.
823 recalculate_deny_mode(struct nfs4_file *fp)
825 struct nfs4_ol_stateid *stp;
827 spin_lock(&fp->fi_lock);
828 fp->fi_share_deny = 0;
829 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
830 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
831 spin_unlock(&fp->fi_lock);
835 reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
840 for (i = 1; i < 4; i++) {
841 if ((i & deny) != i) {
847 /* Recalculate per-file deny mode if there was a change */
849 recalculate_deny_mode(stp->st_file);
852 /* release all access and file references for a given stateid */
854 release_all_access(struct nfs4_ol_stateid *stp)
857 struct nfs4_file *fp = stp->st_file;
859 if (fp && stp->st_deny_bmap != 0)
860 recalculate_deny_mode(fp);
862 for (i = 1; i < 4; i++) {
863 if (test_access(i, stp))
864 nfs4_file_put_access(stp->st_file, i);
865 clear_access(i, stp);
869 static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
871 struct nfs4_file *fp = stp->st_file;
873 spin_lock(&fp->fi_lock);
874 list_del(&stp->st_perfile);
875 spin_unlock(&fp->fi_lock);
876 list_del(&stp->st_perstateowner);
879 static void close_generic_stateid(struct nfs4_ol_stateid *stp)
881 release_all_access(stp);
882 put_nfs4_file(stp->st_file);
886 static void free_generic_stateid(struct nfs4_ol_stateid *stp)
888 remove_stid(&stp->st_stid);
889 nfs4_free_stid(stateid_slab, &stp->st_stid);
892 static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
896 list_del(&stp->st_locks);
897 unhash_generic_stateid(stp);
898 unhash_stid(&stp->st_stid);
899 file = find_any_file(stp->st_file);
901 filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner));
902 close_generic_stateid(stp);
903 free_generic_stateid(stp);
906 static void unhash_lockowner(struct nfs4_lockowner *lo)
908 struct nfs4_ol_stateid *stp;
910 list_del(&lo->lo_owner.so_strhash);
911 while (!list_empty(&lo->lo_owner.so_stateids)) {
912 stp = list_first_entry(&lo->lo_owner.so_stateids,
913 struct nfs4_ol_stateid, st_perstateowner);
914 __release_lock_stateid(stp);
918 static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
920 kfree(lo->lo_owner.so_owner.data);
921 kmem_cache_free(lockowner_slab, lo);
924 static void release_lockowner(struct nfs4_lockowner *lo)
926 unhash_lockowner(lo);
927 nfs4_free_lockowner(lo);
930 static void release_lockowner_if_empty(struct nfs4_lockowner *lo)
932 if (list_empty(&lo->lo_owner.so_stateids))
933 release_lockowner(lo);
936 static void release_lock_stateid(struct nfs4_ol_stateid *stp)
938 struct nfs4_lockowner *lo;
940 lo = lockowner(stp->st_stateowner);
941 __release_lock_stateid(stp);
942 release_lockowner_if_empty(lo);
945 static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp)
947 struct nfs4_ol_stateid *stp;
949 while (!list_empty(&open_stp->st_locks)) {
950 stp = list_entry(open_stp->st_locks.next,
951 struct nfs4_ol_stateid, st_locks);
952 release_lock_stateid(stp);
956 static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
958 unhash_generic_stateid(stp);
959 release_open_stateid_locks(stp);
960 close_generic_stateid(stp);
963 static void release_open_stateid(struct nfs4_ol_stateid *stp)
965 unhash_open_stateid(stp);
966 free_generic_stateid(stp);
969 static void unhash_openowner(struct nfs4_openowner *oo)
971 struct nfs4_ol_stateid *stp;
973 list_del(&oo->oo_owner.so_strhash);
974 list_del(&oo->oo_perclient);
975 while (!list_empty(&oo->oo_owner.so_stateids)) {
976 stp = list_first_entry(&oo->oo_owner.so_stateids,
977 struct nfs4_ol_stateid, st_perstateowner);
978 release_open_stateid(stp);
982 static void release_last_closed_stateid(struct nfs4_openowner *oo)
984 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
987 free_generic_stateid(s);
988 oo->oo_last_closed_stid = NULL;
992 static void nfs4_free_openowner(struct nfs4_openowner *oo)
994 kfree(oo->oo_owner.so_owner.data);
995 kmem_cache_free(openowner_slab, oo);
998 static void release_openowner(struct nfs4_openowner *oo)
1000 unhash_openowner(oo);
1001 list_del(&oo->oo_close_lru);
1002 release_last_closed_stateid(oo);
1003 nfs4_free_openowner(oo);
1007 hash_sessionid(struct nfs4_sessionid *sessionid)
1009 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1011 return sid->sequence % SESSION_HASH_SIZE;
1016 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1018 u32 *ptr = (u32 *)(&sessionid->data[0]);
1019 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1023 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1029 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1030 * won't be used for replay.
1032 void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1034 struct nfs4_stateowner *so = cstate->replay_owner;
1036 if (nfserr == nfserr_replay_me)
1039 if (!seqid_mutating_err(ntohl(nfserr))) {
1040 cstate->replay_owner = NULL;
1045 if (so->so_is_open_owner)
1046 release_last_closed_stateid(openowner(so));
1052 gen_sessionid(struct nfsd4_session *ses)
1054 struct nfs4_client *clp = ses->se_client;
1055 struct nfsd4_sessionid *sid;
1057 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1058 sid->clientid = clp->cl_clientid;
1059 sid->sequence = current_sessionid++;
1064 * The protocol defines ca_maxresponssize_cached to include the size of
1065 * the rpc header, but all we need to cache is the data starting after
1066 * the end of the initial SEQUENCE operation--the rest we regenerate
1067 * each time. Therefore we can advertise a ca_maxresponssize_cached
1068 * value that is the number of bytes in our cache plus a few additional
1069 * bytes. In order to stay on the safe side, and not promise more than
1070 * we can cache, those additional bytes must be the minimum possible: 24
1071 * bytes of rpc header (xid through accept state, with AUTH_NULL
1072 * verifier), 12 for the compound header (with zero-length tag), and 44
1073 * for the SEQUENCE op response:
1075 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1078 free_session_slots(struct nfsd4_session *ses)
1082 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
1083 kfree(ses->se_slots[i]);
1087 * We don't actually need to cache the rpc and session headers, so we
1088 * can allocate a little less for each slot:
1090 static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1094 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1097 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1098 return size + sizeof(struct nfsd4_slot);
1102 * XXX: If we run out of reserved DRC memory we could (up to a point)
1103 * re-negotiate active sessions and reduce their slot usage to make
1104 * room for new connections. For now we just fail the create session.
1106 static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
1108 u32 slotsize = slot_bytes(ca);
1109 u32 num = ca->maxreqs;
1112 spin_lock(&nfsd_drc_lock);
1113 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1114 nfsd_drc_max_mem - nfsd_drc_mem_used);
1115 num = min_t(int, num, avail / slotsize);
1116 nfsd_drc_mem_used += num * slotsize;
1117 spin_unlock(&nfsd_drc_lock);
1122 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1124 int slotsize = slot_bytes(ca);
1126 spin_lock(&nfsd_drc_lock);
1127 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1128 spin_unlock(&nfsd_drc_lock);
1131 static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1132 struct nfsd4_channel_attrs *battrs)
1134 int numslots = fattrs->maxreqs;
1135 int slotsize = slot_bytes(fattrs);
1136 struct nfsd4_session *new;
1139 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1140 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1141 mem = numslots * sizeof(struct nfsd4_slot *);
1143 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1146 /* allocate each struct nfsd4_slot and data cache in one piece */
1147 for (i = 0; i < numslots; i++) {
1148 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1149 if (!new->se_slots[i])
1153 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1154 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1159 kfree(new->se_slots[i]);
1164 static void free_conn(struct nfsd4_conn *c)
1166 svc_xprt_put(c->cn_xprt);
1170 static void nfsd4_conn_lost(struct svc_xpt_user *u)
1172 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1173 struct nfs4_client *clp = c->cn_session->se_client;
1175 spin_lock(&clp->cl_lock);
1176 if (!list_empty(&c->cn_persession)) {
1177 list_del(&c->cn_persession);
1180 nfsd4_probe_callback(clp);
1181 spin_unlock(&clp->cl_lock);
1184 static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1186 struct nfsd4_conn *conn;
1188 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1191 svc_xprt_get(rqstp->rq_xprt);
1192 conn->cn_xprt = rqstp->rq_xprt;
1193 conn->cn_flags = flags;
1194 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1198 static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1200 conn->cn_session = ses;
1201 list_add(&conn->cn_persession, &ses->se_conns);
1204 static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1206 struct nfs4_client *clp = ses->se_client;
1208 spin_lock(&clp->cl_lock);
1209 __nfsd4_hash_conn(conn, ses);
1210 spin_unlock(&clp->cl_lock);
1213 static int nfsd4_register_conn(struct nfsd4_conn *conn)
1215 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1216 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1219 static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1223 nfsd4_hash_conn(conn, ses);
1224 ret = nfsd4_register_conn(conn);
1226 /* oops; xprt is already down: */
1227 nfsd4_conn_lost(&conn->cn_xpt_user);
1228 if (conn->cn_flags & NFS4_CDFC4_BACK) {
1229 /* callback channel may be back up */
1230 nfsd4_probe_callback(ses->se_client);
1234 static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1236 u32 dir = NFS4_CDFC4_FORE;
1238 if (cses->flags & SESSION4_BACK_CHAN)
1239 dir |= NFS4_CDFC4_BACK;
1240 return alloc_conn(rqstp, dir);
1243 /* must be called under client_lock */
1244 static void nfsd4_del_conns(struct nfsd4_session *s)
1246 struct nfs4_client *clp = s->se_client;
1247 struct nfsd4_conn *c;
1249 spin_lock(&clp->cl_lock);
1250 while (!list_empty(&s->se_conns)) {
1251 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1252 list_del_init(&c->cn_persession);
1253 spin_unlock(&clp->cl_lock);
1255 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1258 spin_lock(&clp->cl_lock);
1260 spin_unlock(&clp->cl_lock);
1263 static void __free_session(struct nfsd4_session *ses)
1265 free_session_slots(ses);
1269 static void free_session(struct nfsd4_session *ses)
1271 struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
1273 lockdep_assert_held(&nn->client_lock);
1274 nfsd4_del_conns(ses);
1275 nfsd4_put_drc_mem(&ses->se_fchannel);
1276 __free_session(ses);
1279 static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1282 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1284 new->se_client = clp;
1287 INIT_LIST_HEAD(&new->se_conns);
1289 new->se_cb_seq_nr = 1;
1290 new->se_flags = cses->flags;
1291 new->se_cb_prog = cses->callback_prog;
1292 new->se_cb_sec = cses->cb_sec;
1293 atomic_set(&new->se_ref, 0);
1294 idx = hash_sessionid(&new->se_sessionid);
1295 spin_lock(&nn->client_lock);
1296 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1297 spin_lock(&clp->cl_lock);
1298 list_add(&new->se_perclnt, &clp->cl_sessions);
1299 spin_unlock(&clp->cl_lock);
1300 spin_unlock(&nn->client_lock);
1302 if (cses->flags & SESSION4_BACK_CHAN) {
1303 struct sockaddr *sa = svc_addr(rqstp);
1305 * This is a little silly; with sessions there's no real
1306 * use for the callback address. Use the peer address
1307 * as a reasonable default for now, but consider fixing
1308 * the rpc client not to require an address in the
1311 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1312 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1316 /* caller must hold client_lock */
1317 static struct nfsd4_session *
1318 __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1320 struct nfsd4_session *elem;
1322 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1324 dump_sessionid(__func__, sessionid);
1325 idx = hash_sessionid(sessionid);
1326 /* Search in the appropriate list */
1327 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1328 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1329 NFS4_MAX_SESSIONID_LEN)) {
1334 dprintk("%s: session not found\n", __func__);
1338 static struct nfsd4_session *
1339 find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1342 struct nfsd4_session *session;
1343 __be32 status = nfserr_badsession;
1345 session = __find_in_sessionid_hashtbl(sessionid, net);
1348 status = nfsd4_get_session_locked(session);
1356 /* caller must hold client_lock */
1358 unhash_session(struct nfsd4_session *ses)
1360 list_del(&ses->se_hash);
1361 spin_lock(&ses->se_client->cl_lock);
1362 list_del(&ses->se_perclnt);
1363 spin_unlock(&ses->se_client->cl_lock);
1366 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1368 STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1370 if (clid->cl_boot == nn->boot_time)
1372 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1373 clid->cl_boot, clid->cl_id, nn->boot_time);
1378 * XXX Should we use a slab cache ?
1379 * This type of memory management is somewhat inefficient, but we use it
1380 * anyway since SETCLIENTID is not a common operation.
1382 static struct nfs4_client *alloc_client(struct xdr_netobj name)
1384 struct nfs4_client *clp;
1386 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1389 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
1390 if (clp->cl_name.data == NULL) {
1394 clp->cl_name.len = name.len;
1395 INIT_LIST_HEAD(&clp->cl_sessions);
1396 idr_init(&clp->cl_stateids);
1397 atomic_set(&clp->cl_refcount, 0);
1398 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1399 INIT_LIST_HEAD(&clp->cl_idhash);
1400 INIT_LIST_HEAD(&clp->cl_openowners);
1401 INIT_LIST_HEAD(&clp->cl_delegations);
1402 INIT_LIST_HEAD(&clp->cl_lru);
1403 INIT_LIST_HEAD(&clp->cl_callbacks);
1404 INIT_LIST_HEAD(&clp->cl_revoked);
1405 spin_lock_init(&clp->cl_lock);
1406 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1411 free_client(struct nfs4_client *clp)
1413 struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
1415 lockdep_assert_held(&nn->client_lock);
1416 while (!list_empty(&clp->cl_sessions)) {
1417 struct nfsd4_session *ses;
1418 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1420 list_del(&ses->se_perclnt);
1421 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1424 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1425 free_svc_cred(&clp->cl_cred);
1426 kfree(clp->cl_name.data);
1427 idr_destroy(&clp->cl_stateids);
1431 /* must be called under the client_lock */
1433 unhash_client_locked(struct nfs4_client *clp)
1435 struct nfsd4_session *ses;
1437 list_del(&clp->cl_lru);
1438 spin_lock(&clp->cl_lock);
1439 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1440 list_del_init(&ses->se_hash);
1441 spin_unlock(&clp->cl_lock);
1445 destroy_client(struct nfs4_client *clp)
1447 struct nfs4_openowner *oo;
1448 struct nfs4_delegation *dp;
1449 struct list_head reaplist;
1450 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1452 INIT_LIST_HEAD(&reaplist);
1453 spin_lock(&state_lock);
1454 while (!list_empty(&clp->cl_delegations)) {
1455 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1456 list_del_init(&dp->dl_perclnt);
1457 /* Ensure that deleg break won't try to requeue it */
1459 list_move(&dp->dl_recall_lru, &reaplist);
1461 spin_unlock(&state_lock);
1462 while (!list_empty(&reaplist)) {
1463 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1464 destroy_delegation(dp);
1466 list_splice_init(&clp->cl_revoked, &reaplist);
1467 while (!list_empty(&reaplist)) {
1468 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1469 destroy_revoked_delegation(dp);
1471 while (!list_empty(&clp->cl_openowners)) {
1472 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1473 release_openowner(oo);
1475 nfsd4_shutdown_callback(clp);
1476 if (clp->cl_cb_conn.cb_xprt)
1477 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
1478 list_del(&clp->cl_idhash);
1479 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1480 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1482 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1483 spin_lock(&nn->client_lock);
1484 unhash_client_locked(clp);
1485 WARN_ON_ONCE(atomic_read(&clp->cl_refcount));
1487 spin_unlock(&nn->client_lock);
1490 static void expire_client(struct nfs4_client *clp)
1492 nfsd4_client_record_remove(clp);
1493 destroy_client(clp);
1496 static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1498 memcpy(target->cl_verifier.data, source->data,
1499 sizeof(target->cl_verifier.data));
1502 static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1504 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1505 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1508 static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1510 if (source->cr_principal) {
1511 target->cr_principal =
1512 kstrdup(source->cr_principal, GFP_KERNEL);
1513 if (target->cr_principal == NULL)
1516 target->cr_principal = NULL;
1517 target->cr_flavor = source->cr_flavor;
1518 target->cr_uid = source->cr_uid;
1519 target->cr_gid = source->cr_gid;
1520 target->cr_group_info = source->cr_group_info;
1521 get_group_info(target->cr_group_info);
1522 target->cr_gss_mech = source->cr_gss_mech;
1523 if (source->cr_gss_mech)
1524 gss_mech_get(source->cr_gss_mech);
1529 compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1533 res = o1->len - o2->len;
1536 return (long long)memcmp(o1->data, o2->data, o1->len);
1539 static int same_name(const char *n1, const char *n2)
1541 return 0 == memcmp(n1, n2, HEXDIR_LEN);
1545 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1547 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
1551 same_clid(clientid_t *cl1, clientid_t *cl2)
1553 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
1556 static bool groups_equal(struct group_info *g1, struct group_info *g2)
1560 if (g1->ngroups != g2->ngroups)
1562 for (i=0; i<g1->ngroups; i++)
1563 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
1569 * RFC 3530 language requires clid_inuse be returned when the
1570 * "principal" associated with a requests differs from that previously
1571 * used. We use uid, gid's, and gss principal string as our best
1572 * approximation. We also don't want to allow non-gss use of a client
1573 * established using gss: in theory cr_principal should catch that
1574 * change, but in practice cr_principal can be null even in the gss case
1575 * since gssd doesn't always pass down a principal string.
1577 static bool is_gss_cred(struct svc_cred *cr)
1579 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1580 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1585 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1587 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
1588 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1589 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
1590 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1592 if (cr1->cr_principal == cr2->cr_principal)
1594 if (!cr1->cr_principal || !cr2->cr_principal)
1596 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
1599 static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1601 struct svc_cred *cr = &rqstp->rq_cred;
1604 if (!cr->cr_gss_mech)
1606 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1607 return service == RPC_GSS_SVC_INTEGRITY ||
1608 service == RPC_GSS_SVC_PRIVACY;
1611 static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1613 struct svc_cred *cr = &rqstp->rq_cred;
1615 if (!cl->cl_mach_cred)
1617 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1619 if (!svc_rqst_integrity_protected(rqstp))
1621 if (!cr->cr_principal)
1623 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1626 static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
1628 static u32 current_clientid = 1;
1630 clp->cl_clientid.cl_boot = nn->boot_time;
1631 clp->cl_clientid.cl_id = current_clientid++;
1634 static void gen_confirm(struct nfs4_client *clp)
1640 * This is opaque to client, so no need to byte-swap. Use
1641 * __force to keep sparse happy
1643 verf[0] = (__force __be32)get_seconds();
1644 verf[1] = (__force __be32)i++;
1645 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
1648 static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
1650 struct nfs4_stid *ret;
1652 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1653 if (!ret || !ret->sc_type)
1658 static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
1660 struct nfs4_stid *s;
1662 s = find_stateid(cl, t);
1665 if (typemask & s->sc_type)
1670 static struct nfs4_client *create_client(struct xdr_netobj name,
1671 struct svc_rqst *rqstp, nfs4_verifier *verf)
1673 struct nfs4_client *clp;
1674 struct sockaddr *sa = svc_addr(rqstp);
1676 struct net *net = SVC_NET(rqstp);
1677 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1679 clp = alloc_client(name);
1683 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1685 spin_lock(&nn->client_lock);
1687 spin_unlock(&nn->client_lock);
1690 INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null);
1691 clp->cl_time = get_seconds();
1692 clear_bit(0, &clp->cl_cb_slot_busy);
1693 copy_verf(clp, verf);
1694 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
1696 clp->cl_cb_session = NULL;
1702 add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1704 struct rb_node **new = &(root->rb_node), *parent = NULL;
1705 struct nfs4_client *clp;
1708 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1711 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1712 new = &((*new)->rb_left);
1714 new = &((*new)->rb_right);
1717 rb_link_node(&new_clp->cl_namenode, parent, new);
1718 rb_insert_color(&new_clp->cl_namenode, root);
1721 static struct nfs4_client *
1722 find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1725 struct rb_node *node = root->rb_node;
1726 struct nfs4_client *clp;
1729 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1730 cmp = compare_blob(&clp->cl_name, name);
1732 node = node->rb_left;
1734 node = node->rb_right;
1742 add_to_unconfirmed(struct nfs4_client *clp)
1744 unsigned int idhashval;
1745 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1747 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1748 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
1749 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1750 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
1755 move_to_confirmed(struct nfs4_client *clp)
1757 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1758 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1760 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
1761 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
1762 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1763 add_clp_to_name_tree(clp, &nn->conf_name_tree);
1764 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1768 static struct nfs4_client *
1769 find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
1771 struct nfs4_client *clp;
1772 unsigned int idhashval = clientid_hashval(clid->cl_id);
1774 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
1775 if (same_clid(&clp->cl_clientid, clid)) {
1776 if ((bool)clp->cl_minorversion != sessions)
1785 static struct nfs4_client *
1786 find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1788 struct list_head *tbl = nn->conf_id_hashtbl;
1790 return find_client_in_id_table(tbl, clid, sessions);
1793 static struct nfs4_client *
1794 find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1796 struct list_head *tbl = nn->unconf_id_hashtbl;
1798 return find_client_in_id_table(tbl, clid, sessions);
1801 static bool clp_used_exchangeid(struct nfs4_client *clp)
1803 return clp->cl_exchange_flags != 0;
1806 static struct nfs4_client *
1807 find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1809 return find_clp_in_name_tree(name, &nn->conf_name_tree);
1812 static struct nfs4_client *
1813 find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1815 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
1819 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
1821 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
1822 struct sockaddr *sa = svc_addr(rqstp);
1823 u32 scopeid = rpc_get_scope_id(sa);
1824 unsigned short expected_family;
1826 /* Currently, we only support tcp and tcp6 for the callback channel */
1827 if (se->se_callback_netid_len == 3 &&
1828 !memcmp(se->se_callback_netid_val, "tcp", 3))
1829 expected_family = AF_INET;
1830 else if (se->se_callback_netid_len == 4 &&
1831 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1832 expected_family = AF_INET6;
1836 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
1837 se->se_callback_addr_len,
1838 (struct sockaddr *)&conn->cb_addr,
1839 sizeof(conn->cb_addr));
1841 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
1844 if (conn->cb_addr.ss_family == AF_INET6)
1845 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
1847 conn->cb_prog = se->se_callback_prog;
1848 conn->cb_ident = se->se_callback_ident;
1849 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
1852 conn->cb_addr.ss_family = AF_UNSPEC;
1853 conn->cb_addrlen = 0;
1854 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
1855 "will not receive delegations\n",
1856 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1862 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1865 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1867 struct xdr_buf *buf = resp->xdr.buf;
1868 struct nfsd4_slot *slot = resp->cstate.slot;
1871 dprintk("--> %s slot %p\n", __func__, slot);
1873 slot->sl_opcnt = resp->opcnt;
1874 slot->sl_status = resp->cstate.status;
1876 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
1877 if (nfsd4_not_cached(resp)) {
1878 slot->sl_datalen = 0;
1881 base = resp->cstate.data_offset;
1882 slot->sl_datalen = buf->len - base;
1883 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
1884 WARN("%s: sessions DRC could not cache compound\n", __func__);
1889 * Encode the replay sequence operation from the slot values.
1890 * If cachethis is FALSE encode the uncached rep error on the next
1891 * operation which sets resp->p and increments resp->opcnt for
1892 * nfs4svc_encode_compoundres.
1896 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1897 struct nfsd4_compoundres *resp)
1899 struct nfsd4_op *op;
1900 struct nfsd4_slot *slot = resp->cstate.slot;
1902 /* Encode the replayed sequence operation */
1903 op = &args->ops[resp->opcnt - 1];
1904 nfsd4_encode_operation(resp, op);
1906 /* Return nfserr_retry_uncached_rep in next operation. */
1907 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
1908 op = &args->ops[resp->opcnt++];
1909 op->status = nfserr_retry_uncached_rep;
1910 nfsd4_encode_operation(resp, op);
1916 * The sequence operation is not cached because we can use the slot and
1920 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1921 struct nfsd4_sequence *seq)
1923 struct nfsd4_slot *slot = resp->cstate.slot;
1924 struct xdr_stream *xdr = &resp->xdr;
1928 dprintk("--> %s slot %p\n", __func__, slot);
1930 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1934 p = xdr_reserve_space(xdr, slot->sl_datalen);
1937 return nfserr_serverfault;
1939 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
1940 xdr_commit_encode(xdr);
1942 resp->opcnt = slot->sl_opcnt;
1943 return slot->sl_status;
1947 * Set the exchange_id flags returned by the server.
1950 nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1952 /* pNFS is not supported */
1953 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1955 /* Referrals are supported, Migration is not. */
1956 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1958 /* set the wire flags to return to client. */
1959 clid->flags = new->cl_exchange_flags;
1962 static bool client_has_state(struct nfs4_client *clp)
1965 * Note clp->cl_openowners check isn't quite right: there's no
1966 * need to count owners without stateid's.
1968 * Also note we should probably be using this in 4.0 case too.
1970 return !list_empty(&clp->cl_openowners)
1971 || !list_empty(&clp->cl_delegations)
1972 || !list_empty(&clp->cl_sessions);
1976 nfsd4_exchange_id(struct svc_rqst *rqstp,
1977 struct nfsd4_compound_state *cstate,
1978 struct nfsd4_exchange_id *exid)
1980 struct nfs4_client *unconf, *conf, *new;
1982 char addr_str[INET6_ADDRSTRLEN];
1983 nfs4_verifier verf = exid->verifier;
1984 struct sockaddr *sa = svc_addr(rqstp);
1985 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
1986 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1988 rpc_ntop(sa, addr_str, sizeof(addr_str));
1989 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1990 "ip_addr=%s flags %x, spa_how %d\n",
1991 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
1992 addr_str, exid->flags, exid->spa_how);
1994 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
1995 return nfserr_inval;
1997 switch (exid->spa_how) {
1999 if (!svc_rqst_integrity_protected(rqstp))
2000 return nfserr_inval;
2003 default: /* checked by xdr code */
2006 return nfserr_encr_alg_unsupp;
2009 /* Cases below refer to rfc 5661 section 18.35.4: */
2011 conf = find_confirmed_client_by_name(&exid->clname, nn);
2013 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
2014 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
2017 if (!clp_used_exchangeid(conf)) { /* buggy client */
2018 status = nfserr_inval;
2021 if (!mach_creds_match(conf, rqstp)) {
2022 status = nfserr_wrong_cred;
2025 if (!creds_match) { /* case 9 */
2026 status = nfserr_perm;
2029 if (!verfs_match) { /* case 8 */
2030 status = nfserr_not_same;
2034 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
2038 if (!creds_match) { /* case 3 */
2039 if (client_has_state(conf)) {
2040 status = nfserr_clid_inuse;
2043 expire_client(conf);
2046 if (verfs_match) { /* case 2 */
2047 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
2051 /* case 5, client reboot */
2055 if (update) { /* case 7 */
2056 status = nfserr_noent;
2060 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
2061 if (unconf) /* case 4, possible retry or client restart */
2062 expire_client(unconf);
2064 /* case 1 (normal case) */
2066 new = create_client(exid->clname, rqstp, &verf);
2068 status = nfserr_jukebox;
2071 new->cl_minorversion = cstate->minorversion;
2072 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
2075 add_to_unconfirmed(new);
2077 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
2078 exid->clientid.cl_id = new->cl_clientid.cl_id;
2080 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
2081 nfsd4_set_ex_flags(new, exid);
2083 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2084 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
2088 nfs4_unlock_state();
2093 check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
2095 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2098 /* The slot is in use, and no response has been sent. */
2100 if (seqid == slot_seqid)
2101 return nfserr_jukebox;
2103 return nfserr_seq_misordered;
2105 /* Note unsigned 32-bit arithmetic handles wraparound: */
2106 if (likely(seqid == slot_seqid + 1))
2108 if (seqid == slot_seqid)
2109 return nfserr_replay_cache;
2110 return nfserr_seq_misordered;
2114 * Cache the create session result into the create session single DRC
2115 * slot cache by saving the xdr structure. sl_seqid has been set.
2116 * Do this for solo or embedded create session operations.
2119 nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
2120 struct nfsd4_clid_slot *slot, __be32 nfserr)
2122 slot->sl_status = nfserr;
2123 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2127 nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2128 struct nfsd4_clid_slot *slot)
2130 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2131 return slot->sl_status;
2134 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2135 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2136 1 + /* MIN tag is length with zero, only length */ \
2137 3 + /* version, opcount, opcode */ \
2138 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2139 /* seqid, slotID, slotID, cache */ \
2140 4 ) * sizeof(__be32))
2142 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2143 2 + /* verifier: AUTH_NULL, length 0 */\
2145 1 + /* MIN tag is length with zero, only length */ \
2146 3 + /* opcount, opcode, opstatus*/ \
2147 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2148 /* seqid, slotID, slotID, slotID, status */ \
2149 5 ) * sizeof(__be32))
2151 static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
2153 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2155 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2156 return nfserr_toosmall;
2157 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2158 return nfserr_toosmall;
2159 ca->headerpadsz = 0;
2160 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2161 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2162 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2163 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2164 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2165 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2167 * Note decreasing slot size below client's request may make it
2168 * difficult for client to function correctly, whereas
2169 * decreasing the number of slots will (just?) affect
2170 * performance. When short on memory we therefore prefer to
2171 * decrease number of slots instead of their size. Clients that
2172 * request larger slots than they need will get poor results:
2174 ca->maxreqs = nfsd4_get_drc_mem(ca);
2176 return nfserr_jukebox;
2181 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2182 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2183 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2184 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2186 static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2188 ca->headerpadsz = 0;
2191 * These RPC_MAX_HEADER macros are overkill, especially since we
2192 * don't even do gss on the backchannel yet. But this is still
2193 * less than 1k. Tighten up this estimate in the unlikely event
2194 * it turns out to be a problem for some client:
2196 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
2197 return nfserr_toosmall;
2198 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
2199 return nfserr_toosmall;
2200 ca->maxresp_cached = 0;
2202 return nfserr_toosmall;
2207 static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2209 switch (cbs->flavor) {
2215 * GSS case: the spec doesn't allow us to return this
2216 * error. But it also doesn't allow us not to support
2218 * I'd rather this fail hard than return some error the
2219 * client might think it can already handle:
2221 return nfserr_encr_alg_unsupp;
2226 nfsd4_create_session(struct svc_rqst *rqstp,
2227 struct nfsd4_compound_state *cstate,
2228 struct nfsd4_create_session *cr_ses)
2230 struct sockaddr *sa = svc_addr(rqstp);
2231 struct nfs4_client *conf, *unconf;
2232 struct nfsd4_session *new;
2233 struct nfsd4_conn *conn;
2234 struct nfsd4_clid_slot *cs_slot = NULL;
2236 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2238 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2239 return nfserr_inval;
2240 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2243 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
2246 status = check_backchannel_attrs(&cr_ses->back_channel);
2248 goto out_release_drc_mem;
2249 status = nfserr_jukebox;
2250 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
2252 goto out_release_drc_mem;
2253 conn = alloc_conn_from_crses(rqstp, cr_ses);
2255 goto out_free_session;
2258 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
2259 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
2260 WARN_ON_ONCE(conf && unconf);
2263 status = nfserr_wrong_cred;
2264 if (!mach_creds_match(conf, rqstp))
2266 cs_slot = &conf->cl_cs_slot;
2267 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2268 if (status == nfserr_replay_cache) {
2269 status = nfsd4_replay_create_session(cr_ses, cs_slot);
2271 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
2272 status = nfserr_seq_misordered;
2275 } else if (unconf) {
2276 struct nfs4_client *old;
2277 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
2278 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
2279 status = nfserr_clid_inuse;
2282 status = nfserr_wrong_cred;
2283 if (!mach_creds_match(unconf, rqstp))
2285 cs_slot = &unconf->cl_cs_slot;
2286 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2288 /* an unconfirmed replay returns misordered */
2289 status = nfserr_seq_misordered;
2292 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
2294 status = mark_client_expired(old);
2299 move_to_confirmed(unconf);
2302 status = nfserr_stale_clientid;
2307 * We do not support RDMA or persistent sessions
2309 cr_ses->flags &= ~SESSION4_PERSIST;
2310 cr_ses->flags &= ~SESSION4_RDMA;
2312 init_session(rqstp, new, conf, cr_ses);
2313 nfsd4_init_conn(rqstp, conn, new);
2315 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
2316 NFS4_MAX_SESSIONID_LEN);
2317 cs_slot->sl_seqid++;
2318 cr_ses->seqid = cs_slot->sl_seqid;
2320 /* cache solo and embedded create sessions under the state lock */
2321 nfsd4_cache_create_session(cr_ses, cs_slot, status);
2322 nfs4_unlock_state();
2325 nfs4_unlock_state();
2328 __free_session(new);
2329 out_release_drc_mem:
2330 nfsd4_put_drc_mem(&cr_ses->fore_channel);
2334 static __be32 nfsd4_map_bcts_dir(u32 *dir)
2337 case NFS4_CDFC4_FORE:
2338 case NFS4_CDFC4_BACK:
2340 case NFS4_CDFC4_FORE_OR_BOTH:
2341 case NFS4_CDFC4_BACK_OR_BOTH:
2342 *dir = NFS4_CDFC4_BOTH;
2345 return nfserr_inval;
2348 __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2350 struct nfsd4_session *session = cstate->session;
2351 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2354 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2357 spin_lock(&nn->client_lock);
2358 session->se_cb_prog = bc->bc_cb_program;
2359 session->se_cb_sec = bc->bc_cb_sec;
2360 spin_unlock(&nn->client_lock);
2362 nfsd4_probe_callback(session->se_client);
2367 __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2368 struct nfsd4_compound_state *cstate,
2369 struct nfsd4_bind_conn_to_session *bcts)
2372 struct nfsd4_conn *conn;
2373 struct nfsd4_session *session;
2374 struct net *net = SVC_NET(rqstp);
2375 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2377 if (!nfsd4_last_compound_op(rqstp))
2378 return nfserr_not_only_op;
2380 spin_lock(&nn->client_lock);
2381 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
2382 spin_unlock(&nn->client_lock);
2384 goto out_no_session;
2385 status = nfserr_wrong_cred;
2386 if (!mach_creds_match(session->se_client, rqstp))
2388 status = nfsd4_map_bcts_dir(&bcts->dir);
2391 conn = alloc_conn(rqstp, bcts->dir);
2392 status = nfserr_jukebox;
2395 nfsd4_init_conn(rqstp, conn, session);
2398 nfsd4_put_session(session);
2400 nfs4_unlock_state();
2404 static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2408 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2412 nfsd4_destroy_session(struct svc_rqst *r,
2413 struct nfsd4_compound_state *cstate,
2414 struct nfsd4_destroy_session *sessionid)
2416 struct nfsd4_session *ses;
2418 int ref_held_by_me = 0;
2419 struct net *net = SVC_NET(r);
2420 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2423 status = nfserr_not_only_op;
2424 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
2425 if (!nfsd4_last_compound_op(r))
2429 dump_sessionid(__func__, &sessionid->sessionid);
2430 spin_lock(&nn->client_lock);
2431 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
2433 goto out_client_lock;
2434 status = nfserr_wrong_cred;
2435 if (!mach_creds_match(ses->se_client, r))
2436 goto out_put_session;
2437 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
2439 goto out_put_session;
2440 unhash_session(ses);
2441 spin_unlock(&nn->client_lock);
2443 nfsd4_probe_callback_sync(ses->se_client);
2445 spin_lock(&nn->client_lock);
2448 nfsd4_put_session_locked(ses);
2450 spin_unlock(&nn->client_lock);
2452 nfs4_unlock_state();
2456 static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
2458 struct nfsd4_conn *c;
2460 list_for_each_entry(c, &s->se_conns, cn_persession) {
2461 if (c->cn_xprt == xpt) {
2468 static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
2470 struct nfs4_client *clp = ses->se_client;
2471 struct nfsd4_conn *c;
2472 __be32 status = nfs_ok;
2475 spin_lock(&clp->cl_lock);
2476 c = __nfsd4_find_conn(new->cn_xprt, ses);
2479 status = nfserr_conn_not_bound_to_session;
2480 if (clp->cl_mach_cred)
2482 __nfsd4_hash_conn(new, ses);
2483 spin_unlock(&clp->cl_lock);
2484 ret = nfsd4_register_conn(new);
2486 /* oops; xprt is already down: */
2487 nfsd4_conn_lost(&new->cn_xpt_user);
2490 spin_unlock(&clp->cl_lock);
2495 static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2497 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2499 return args->opcnt > session->se_fchannel.maxops;
2502 static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2503 struct nfsd4_session *session)
2505 struct xdr_buf *xb = &rqstp->rq_arg;
2507 return xb->len > session->se_fchannel.maxreq_sz;
2511 nfsd4_sequence(struct svc_rqst *rqstp,
2512 struct nfsd4_compound_state *cstate,
2513 struct nfsd4_sequence *seq)
2515 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2516 struct xdr_stream *xdr = &resp->xdr;
2517 struct nfsd4_session *session;
2518 struct nfs4_client *clp;
2519 struct nfsd4_slot *slot;
2520 struct nfsd4_conn *conn;
2523 struct net *net = SVC_NET(rqstp);
2524 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2526 if (resp->opcnt != 1)
2527 return nfserr_sequence_pos;
2530 * Will be either used or freed by nfsd4_sequence_check_conn
2533 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2535 return nfserr_jukebox;
2537 spin_lock(&nn->client_lock);
2538 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
2540 goto out_no_session;
2541 clp = session->se_client;
2543 status = nfserr_too_many_ops;
2544 if (nfsd4_session_too_many_ops(rqstp, session))
2545 goto out_put_session;
2547 status = nfserr_req_too_big;
2548 if (nfsd4_request_too_big(rqstp, session))
2549 goto out_put_session;
2551 status = nfserr_badslot;
2552 if (seq->slotid >= session->se_fchannel.maxreqs)
2553 goto out_put_session;
2555 slot = session->se_slots[seq->slotid];
2556 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2558 /* We do not negotiate the number of slots yet, so set the
2559 * maxslots to the session maxreqs which is used to encode
2560 * sr_highest_slotid and the sr_target_slot id to maxslots */
2561 seq->maxslots = session->se_fchannel.maxreqs;
2563 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2564 slot->sl_flags & NFSD4_SLOT_INUSE);
2565 if (status == nfserr_replay_cache) {
2566 status = nfserr_seq_misordered;
2567 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
2568 goto out_put_session;
2569 cstate->slot = slot;
2570 cstate->session = session;
2572 /* Return the cached reply status and set cstate->status
2573 * for nfsd4_proc_compound processing */
2574 status = nfsd4_replay_cache_entry(resp, seq);
2575 cstate->status = nfserr_replay_cache;
2579 goto out_put_session;
2581 status = nfsd4_sequence_check_conn(conn, session);
2584 goto out_put_session;
2586 buflen = (seq->cachethis) ?
2587 session->se_fchannel.maxresp_cached :
2588 session->se_fchannel.maxresp_sz;
2589 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2591 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
2592 goto out_put_session;
2593 svc_reserve(rqstp, buflen);
2596 /* Success! bump slot seqid */
2597 slot->sl_seqid = seq->seqid;
2598 slot->sl_flags |= NFSD4_SLOT_INUSE;
2600 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
2602 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
2604 cstate->slot = slot;
2605 cstate->session = session;
2609 switch (clp->cl_cb_state) {
2611 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2613 case NFSD4_CB_FAULT:
2614 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2617 seq->status_flags = 0;
2619 if (!list_empty(&clp->cl_revoked))
2620 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
2624 spin_unlock(&nn->client_lock);
2627 nfsd4_put_session_locked(session);
2628 goto out_no_session;
2632 nfsd4_sequence_done(struct nfsd4_compoundres *resp)
2634 struct nfsd4_compound_state *cs = &resp->cstate;
2636 if (nfsd4_has_session(cs)) {
2637 if (cs->status != nfserr_replay_cache) {
2638 nfsd4_store_cache_entry(resp);
2639 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
2641 /* Drop session reference that was taken in nfsd4_sequence() */
2642 nfsd4_put_session(cs->session);
2644 put_client_renew(cs->clp);
2648 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2650 struct nfs4_client *conf, *unconf, *clp;
2652 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2655 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
2656 conf = find_confirmed_client(&dc->clientid, true, nn);
2657 WARN_ON_ONCE(conf && unconf);
2662 if (client_has_state(conf)) {
2663 status = nfserr_clientid_busy;
2669 status = nfserr_stale_clientid;
2672 if (!mach_creds_match(clp, rqstp)) {
2673 status = nfserr_wrong_cred;
2678 nfs4_unlock_state();
2683 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2687 if (rc->rca_one_fs) {
2688 if (!cstate->current_fh.fh_dentry)
2689 return nfserr_nofilehandle;
2691 * We don't take advantage of the rca_one_fs case.
2692 * That's OK, it's optional, we can safely ignore it.
2698 status = nfserr_complete_already;
2699 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2700 &cstate->session->se_client->cl_flags))
2703 status = nfserr_stale_clientid;
2704 if (is_client_expired(cstate->session->se_client))
2706 * The following error isn't really legal.
2707 * But we only get here if the client just explicitly
2708 * destroyed the client. Surely it no longer cares what
2709 * error it gets back on an operation for the dead
2715 nfsd4_client_record_create(cstate->session->se_client);
2717 nfs4_unlock_state();
2722 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2723 struct nfsd4_setclientid *setclid)
2725 struct xdr_netobj clname = setclid->se_name;
2726 nfs4_verifier clverifier = setclid->se_verf;
2727 struct nfs4_client *conf, *unconf, *new;
2729 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2731 /* Cases below refer to rfc 3530 section 14.2.33: */
2733 conf = find_confirmed_client_by_name(&clname, nn);
2736 status = nfserr_clid_inuse;
2737 if (clp_used_exchangeid(conf))
2739 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
2740 char addr_str[INET6_ADDRSTRLEN];
2741 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2743 dprintk("NFSD: setclientid: string in use by client "
2744 "at %s\n", addr_str);
2748 unconf = find_unconfirmed_client_by_name(&clname, nn);
2750 expire_client(unconf);
2751 status = nfserr_jukebox;
2752 new = create_client(clname, rqstp, &clverifier);
2755 if (conf && same_verf(&conf->cl_verifier, &clverifier))
2756 /* case 1: probable callback update */
2757 copy_clid(new, conf);
2758 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2760 new->cl_minorversion = 0;
2761 gen_callback(new, setclid, rqstp);
2762 add_to_unconfirmed(new);
2763 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2764 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2765 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2768 nfs4_unlock_state();
2774 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2775 struct nfsd4_compound_state *cstate,
2776 struct nfsd4_setclientid_confirm *setclientid_confirm)
2778 struct nfs4_client *conf, *unconf;
2779 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2780 clientid_t * clid = &setclientid_confirm->sc_clientid;
2782 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2784 if (STALE_CLIENTID(clid, nn))
2785 return nfserr_stale_clientid;
2788 conf = find_confirmed_client(clid, false, nn);
2789 unconf = find_unconfirmed_client(clid, false, nn);
2791 * We try hard to give out unique clientid's, so if we get an
2792 * attempt to confirm the same clientid with a different cred,
2793 * there's a bug somewhere. Let's charitably assume it's our
2796 status = nfserr_serverfault;
2797 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2799 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2801 /* cases below refer to rfc 3530 section 14.2.34: */
2802 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2803 if (conf && !unconf) /* case 2: probable retransmit */
2805 else /* case 4: client hasn't noticed we rebooted yet? */
2806 status = nfserr_stale_clientid;
2810 if (conf) { /* case 1: callback update */
2811 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2812 nfsd4_probe_callback(conf);
2813 expire_client(unconf);
2814 } else { /* case 3: normal case; new or rebooted client */
2815 conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
2817 status = mark_client_expired(conf);
2820 expire_client(conf);
2822 move_to_confirmed(unconf);
2823 nfsd4_probe_callback(unconf);
2826 nfs4_unlock_state();
2830 static struct nfs4_file *nfsd4_alloc_file(void)
2832 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2835 /* OPEN Share state helper functions */
2836 static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2838 unsigned int hashval = file_hashval(ino);
2840 lockdep_assert_held(&state_lock);
2842 atomic_set(&fp->fi_ref, 1);
2843 spin_lock_init(&fp->fi_lock);
2844 INIT_LIST_HEAD(&fp->fi_stateids);
2845 INIT_LIST_HEAD(&fp->fi_delegations);
2848 fp->fi_had_conflict = false;
2849 fp->fi_lease = NULL;
2850 fp->fi_share_deny = 0;
2851 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2852 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2853 hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
2857 nfsd4_free_slabs(void)
2859 kmem_cache_destroy(openowner_slab);
2860 kmem_cache_destroy(lockowner_slab);
2861 kmem_cache_destroy(file_slab);
2862 kmem_cache_destroy(stateid_slab);
2863 kmem_cache_destroy(deleg_slab);
2867 nfsd4_init_slabs(void)
2869 openowner_slab = kmem_cache_create("nfsd4_openowners",
2870 sizeof(struct nfs4_openowner), 0, 0, NULL);
2871 if (openowner_slab == NULL)
2873 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
2874 sizeof(struct nfs4_lockowner), 0, 0, NULL);
2875 if (lockowner_slab == NULL)
2876 goto out_free_openowner_slab;
2877 file_slab = kmem_cache_create("nfsd4_files",
2878 sizeof(struct nfs4_file), 0, 0, NULL);
2879 if (file_slab == NULL)
2880 goto out_free_lockowner_slab;
2881 stateid_slab = kmem_cache_create("nfsd4_stateids",
2882 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
2883 if (stateid_slab == NULL)
2884 goto out_free_file_slab;
2885 deleg_slab = kmem_cache_create("nfsd4_delegations",
2886 sizeof(struct nfs4_delegation), 0, 0, NULL);
2887 if (deleg_slab == NULL)
2888 goto out_free_stateid_slab;
2891 out_free_stateid_slab:
2892 kmem_cache_destroy(stateid_slab);
2894 kmem_cache_destroy(file_slab);
2895 out_free_lockowner_slab:
2896 kmem_cache_destroy(lockowner_slab);
2897 out_free_openowner_slab:
2898 kmem_cache_destroy(openowner_slab);
2900 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2904 static void init_nfs4_replay(struct nfs4_replay *rp)
2906 rp->rp_status = nfserr_serverfault;
2908 rp->rp_buf = rp->rp_ibuf;
2911 static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
2913 struct nfs4_stateowner *sop;
2915 sop = kmem_cache_alloc(slab, GFP_KERNEL);
2919 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2920 if (!sop->so_owner.data) {
2921 kmem_cache_free(slab, sop);
2924 sop->so_owner.len = owner->len;
2926 INIT_LIST_HEAD(&sop->so_stateids);
2927 sop->so_client = clp;
2928 init_nfs4_replay(&sop->so_replay);
2932 static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
2934 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2936 list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
2937 list_add(&oo->oo_perclient, &clp->cl_openowners);
2940 static struct nfs4_openowner *
2941 alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
2942 struct nfsd4_compound_state *cstate)
2944 struct nfs4_client *clp = cstate->clp;
2945 struct nfs4_openowner *oo;
2947 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2950 oo->oo_owner.so_is_open_owner = 1;
2951 oo->oo_owner.so_seqid = open->op_seqid;
2952 oo->oo_flags = NFS4_OO_NEW;
2953 if (nfsd4_has_session(cstate))
2954 oo->oo_flags |= NFS4_OO_CONFIRMED;
2956 oo->oo_last_closed_stid = NULL;
2957 INIT_LIST_HEAD(&oo->oo_close_lru);
2958 hash_openowner(oo, clp, strhashval);
2962 static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
2963 struct nfs4_openowner *oo = open->op_openowner;
2965 stp->st_stid.sc_type = NFS4_OPEN_STID;
2966 INIT_LIST_HEAD(&stp->st_locks);
2967 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
2968 stp->st_stateowner = &oo->oo_owner;
2971 stp->st_access_bmap = 0;
2972 stp->st_deny_bmap = 0;
2973 set_access(open->op_share_access, stp);
2974 set_deny(open->op_share_deny, stp);
2975 stp->st_openstp = NULL;
2976 spin_lock(&fp->fi_lock);
2977 list_add(&stp->st_perfile, &fp->fi_stateids);
2978 spin_unlock(&fp->fi_lock);
2982 move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
2984 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2986 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
2988 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
2989 oo->oo_time = get_seconds();
2993 same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2996 return (sop->so_owner.len == owner->len) &&
2997 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2998 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
3001 static struct nfs4_openowner *
3002 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
3003 bool sessions, struct nfsd_net *nn)
3005 struct nfs4_stateowner *so;
3006 struct nfs4_openowner *oo;
3007 struct nfs4_client *clp;
3009 list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
3010 if (!so->so_is_open_owner)
3012 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
3014 clp = oo->oo_owner.so_client;
3015 if ((bool)clp->cl_minorversion != sessions)
3017 renew_client(oo->oo_owner.so_client);
3024 /* search file_hashtbl[] for file */
3025 static struct nfs4_file *
3026 find_file_locked(struct inode *ino)
3028 unsigned int hashval = file_hashval(ino);
3029 struct nfs4_file *fp;
3031 lockdep_assert_held(&state_lock);
3033 hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
3034 if (fp->fi_inode == ino) {
3042 static struct nfs4_file *
3043 find_file(struct inode *ino)
3045 struct nfs4_file *fp;
3047 spin_lock(&state_lock);
3048 fp = find_file_locked(ino);
3049 spin_unlock(&state_lock);
3053 static struct nfs4_file *
3054 find_or_add_file(struct inode *ino, struct nfs4_file *new)
3056 struct nfs4_file *fp;
3058 spin_lock(&state_lock);
3059 fp = find_file_locked(ino);
3061 nfsd4_init_file(new, ino);
3064 spin_unlock(&state_lock);
3070 * Called to check deny when READ with all zero stateid or
3071 * WRITE with all zero or all one stateid
3074 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3076 struct inode *ino = current_fh->fh_dentry->d_inode;
3077 struct nfs4_file *fp;
3078 __be32 ret = nfs_ok;
3080 fp = find_file(ino);
3083 /* Check for conflicting share reservations */
3084 spin_lock(&fp->fi_lock);
3085 if (fp->fi_share_deny & deny_type)
3086 ret = nfserr_locked;
3087 spin_unlock(&fp->fi_lock);
3092 void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp)
3094 struct nfs4_client *clp = dp->dl_stid.sc_client;
3095 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
3098 * We can't do this in nfsd_break_deleg_cb because it is
3099 * already holding inode->i_lock
3101 spin_lock(&state_lock);
3102 block_delegations(&dp->dl_fh);
3104 * If the dl_time != 0, then we know that it has already been
3105 * queued for a lease break. Don't queue it again.
3107 if (dp->dl_time == 0) {
3108 dp->dl_time = get_seconds();
3109 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
3111 spin_unlock(&state_lock);
3114 static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3117 * We're assuming the state code never drops its reference
3118 * without first removing the lease. Since we're in this lease
3119 * callback (and since the lease code is serialized by the kernel
3120 * lock) we know the server hasn't removed the lease yet, we know
3121 * it's safe to take a reference.
3123 atomic_inc(&dp->dl_count);
3124 nfsd4_cb_recall(dp);
3127 /* Called from break_lease() with i_lock held. */
3128 static void nfsd_break_deleg_cb(struct file_lock *fl)
3130 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
3131 struct nfs4_delegation *dp;
3134 WARN(1, "(%p)->fl_owner NULL\n", fl);
3137 if (fp->fi_had_conflict) {
3138 WARN(1, "duplicate break on %p\n", fp);
3142 * We don't want the locks code to timeout the lease for us;
3143 * we'll remove it ourself if a delegation isn't returned
3146 fl->fl_break_time = 0;
3148 fp->fi_had_conflict = true;
3149 spin_lock(&fp->fi_lock);
3150 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
3151 nfsd_break_one_deleg(dp);
3152 spin_unlock(&fp->fi_lock);
3156 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
3159 return lease_modify(onlist, arg);
3164 static const struct lock_manager_operations nfsd_lease_mng_ops = {
3165 .lm_break = nfsd_break_deleg_cb,
3166 .lm_change = nfsd_change_deleg_cb,
3169 static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3171 if (nfsd4_has_session(cstate))
3173 if (seqid == so->so_seqid - 1)
3174 return nfserr_replay_me;
3175 if (seqid == so->so_seqid)
3177 return nfserr_bad_seqid;
3180 static __be32 lookup_clientid(clientid_t *clid,
3181 struct nfsd4_compound_state *cstate,
3182 struct nfsd_net *nn)
3184 struct nfs4_client *found;
3187 found = cstate->clp;
3188 if (!same_clid(&found->cl_clientid, clid))
3189 return nfserr_stale_clientid;
3193 if (STALE_CLIENTID(clid, nn))
3194 return nfserr_stale_clientid;
3197 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3198 * cached already then we know this is for is for v4.0 and "sessions"
3201 WARN_ON_ONCE(cstate->session);
3202 found = find_confirmed_client(clid, false, nn);
3204 return nfserr_expired;
3206 /* Cache the nfs4_client in cstate! */
3207 cstate->clp = found;
3208 atomic_inc(&found->cl_refcount);
3213 nfsd4_process_open1(struct nfsd4_compound_state *cstate,
3214 struct nfsd4_open *open, struct nfsd_net *nn)
3216 clientid_t *clientid = &open->op_clientid;
3217 struct nfs4_client *clp = NULL;
3218 unsigned int strhashval;
3219 struct nfs4_openowner *oo = NULL;
3222 if (STALE_CLIENTID(&open->op_clientid, nn))
3223 return nfserr_stale_clientid;
3225 * In case we need it later, after we've already created the
3226 * file and don't want to risk a further failure:
3228 open->op_file = nfsd4_alloc_file();
3229 if (open->op_file == NULL)
3230 return nfserr_jukebox;
3232 status = lookup_clientid(clientid, cstate, nn);
3237 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
3238 oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
3239 open->op_openowner = oo;
3243 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
3244 /* Replace unconfirmed owners without checking for replay. */
3245 release_openowner(oo);
3246 open->op_openowner = NULL;
3249 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3254 oo = alloc_init_open_stateowner(strhashval, open, cstate);
3256 return nfserr_jukebox;
3257 open->op_openowner = oo;
3259 open->op_stp = nfs4_alloc_stateid(clp);
3261 return nfserr_jukebox;
3265 static inline __be32
3266 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3268 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3269 return nfserr_openmode;
3274 static int share_access_to_flags(u32 share_access)
3276 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3279 static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
3281 struct nfs4_stid *ret;
3283 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
3286 return delegstateid(ret);
3289 static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3291 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3292 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3296 nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
3297 struct nfs4_delegation **dp)
3300 __be32 status = nfserr_bad_stateid;
3302 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
3305 flags = share_access_to_flags(open->op_share_access);
3306 status = nfs4_check_delegmode(*dp, flags);
3310 if (!nfsd4_is_deleg_cur(open))
3314 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3318 static struct nfs4_ol_stateid *
3319 nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
3321 struct nfs4_ol_stateid *local, *ret = NULL;
3322 struct nfs4_openowner *oo = open->op_openowner;
3324 spin_lock(&fp->fi_lock);
3325 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3326 /* ignore lock owners */
3327 if (local->st_stateowner->so_is_open_owner == 0)
3329 if (local->st_stateowner == &oo->oo_owner) {
3334 spin_unlock(&fp->fi_lock);
3338 static inline int nfs4_access_to_access(u32 nfs4_access)
3342 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
3343 flags |= NFSD_MAY_READ;
3344 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
3345 flags |= NFSD_MAY_WRITE;
3349 static inline __be32
3350 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
3351 struct nfsd4_open *open)
3353 struct iattr iattr = {
3354 .ia_valid = ATTR_SIZE,
3357 if (!open->op_truncate)
3359 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
3360 return nfserr_inval;
3361 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
3364 static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
3365 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
3366 struct nfsd4_open *open)
3368 struct file *filp = NULL;
3370 int oflag = nfs4_access_to_omode(open->op_share_access);
3371 int access = nfs4_access_to_access(open->op_share_access);
3372 unsigned char old_access_bmap, old_deny_bmap;
3374 spin_lock(&fp->fi_lock);
3377 * Are we trying to set a deny mode that would conflict with
3380 status = nfs4_file_check_deny(fp, open->op_share_deny);
3381 if (status != nfs_ok) {
3382 spin_unlock(&fp->fi_lock);
3386 /* set access to the file */
3387 status = nfs4_file_get_access(fp, open->op_share_access);
3388 if (status != nfs_ok) {
3389 spin_unlock(&fp->fi_lock);
3393 /* Set access bits in stateid */
3394 old_access_bmap = stp->st_access_bmap;
3395 set_access(open->op_share_access, stp);
3397 /* Set new deny mask */
3398 old_deny_bmap = stp->st_deny_bmap;
3399 set_deny(open->op_share_deny, stp);
3400 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
3402 if (!fp->fi_fds[oflag]) {
3403 spin_unlock(&fp->fi_lock);
3404 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
3406 goto out_put_access;
3407 spin_lock(&fp->fi_lock);
3408 if (!fp->fi_fds[oflag]) {
3409 fp->fi_fds[oflag] = filp;
3413 spin_unlock(&fp->fi_lock);
3417 status = nfsd4_truncate(rqstp, cur_fh, open);
3419 goto out_put_access;
3423 stp->st_access_bmap = old_access_bmap;
3424 nfs4_file_put_access(fp, open->op_share_access);
3425 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
3430 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)
3433 unsigned char old_deny_bmap;
3435 if (!test_access(open->op_share_access, stp))
3436 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
3438 /* test and set deny mode */
3439 spin_lock(&fp->fi_lock);
3440 status = nfs4_file_check_deny(fp, open->op_share_deny);
3441 if (status == nfs_ok) {
3442 old_deny_bmap = stp->st_deny_bmap;
3443 set_deny(open->op_share_deny, stp);
3444 fp->fi_share_deny |=
3445 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
3447 spin_unlock(&fp->fi_lock);
3449 if (status != nfs_ok)
3452 status = nfsd4_truncate(rqstp, cur_fh, open);
3453 if (status != nfs_ok)
3454 reset_union_bmap_deny(old_deny_bmap, stp);
3459 nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
3461 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3464 /* Should we give out recallable state?: */
3465 static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3467 if (clp->cl_cb_state == NFSD4_CB_UP)
3470 * In the sessions case, since we don't have to establish a
3471 * separate connection for callbacks, we assume it's OK
3472 * until we hear otherwise:
3474 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3477 static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
3479 struct file_lock *fl;
3481 fl = locks_alloc_lock();
3484 locks_init_lock(fl);
3485 fl->fl_lmops = &nfsd_lease_mng_ops;
3486 fl->fl_flags = FL_DELEG;
3487 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3488 fl->fl_end = OFFSET_MAX;
3489 fl->fl_owner = (fl_owner_t)(dp->dl_file);
3490 fl->fl_pid = current->tgid;
3494 static int nfs4_setlease(struct nfs4_delegation *dp)
3496 struct nfs4_file *fp = dp->dl_file;
3497 struct file_lock *fl;
3500 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
3503 fl->fl_file = find_readable_file(fp);
3504 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
3508 fp->fi_deleg_file = fl->fl_file;
3509 atomic_set(&fp->fi_delegees, 1);
3510 spin_lock(&state_lock);
3511 hash_delegation_locked(dp, fp);
3512 spin_unlock(&state_lock);
3517 locks_free_lock(fl);
3521 static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
3523 if (fp->fi_had_conflict)
3528 return nfs4_setlease(dp);
3529 spin_lock(&state_lock);
3530 atomic_inc(&fp->fi_delegees);
3531 if (fp->fi_had_conflict) {
3532 spin_unlock(&state_lock);
3535 hash_delegation_locked(dp, fp);
3536 spin_unlock(&state_lock);
3540 static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
3542 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3543 if (status == -EAGAIN)
3544 open->op_why_no_deleg = WND4_CONTENTION;
3546 open->op_why_no_deleg = WND4_RESOURCE;
3547 switch (open->op_deleg_want) {
3548 case NFS4_SHARE_WANT_READ_DELEG:
3549 case NFS4_SHARE_WANT_WRITE_DELEG:
3550 case NFS4_SHARE_WANT_ANY_DELEG:
3552 case NFS4_SHARE_WANT_CANCEL:
3553 open->op_why_no_deleg = WND4_CANCELLED;
3555 case NFS4_SHARE_WANT_NO_DELEG:
3562 * Attempt to hand out a delegation.
3564 * Note we don't support write delegations, and won't until the vfs has
3565 * proper support for them.
3568 nfs4_open_delegation(struct net *net, struct svc_fh *fh,
3569 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
3571 struct nfs4_delegation *dp;
3572 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
3576 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
3577 open->op_recall = 0;
3578 switch (open->op_claim_type) {
3579 case NFS4_OPEN_CLAIM_PREVIOUS:
3581 open->op_recall = 1;
3582 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
3585 case NFS4_OPEN_CLAIM_NULL:
3586 case NFS4_OPEN_CLAIM_FH:
3588 * Let's not give out any delegations till everyone's
3589 * had the chance to reclaim theirs....
3591 if (locks_in_grace(net))
3593 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
3596 * Also, if the file was opened for write or
3597 * create, there's a good chance the client's
3598 * about to write to it, resulting in an
3599 * immediate recall (since we don't support
3600 * write delegations):
3602 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
3604 if (open->op_create == NFS4_OPEN_CREATE)
3610 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh);
3613 status = nfs4_set_delegation(dp, stp->st_file);
3617 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
3619 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
3620 STATEID_VAL(&dp->dl_stid.sc_stateid));
3621 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
3624 destroy_delegation(dp);
3626 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
3627 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
3628 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
3629 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3630 open->op_recall = 1;
3633 /* 4.1 client asking for a delegation? */
3634 if (open->op_deleg_want)
3635 nfsd4_open_deleg_none_ext(open, status);
3639 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
3640 struct nfs4_delegation *dp)
3642 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
3643 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3644 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3645 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
3646 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
3647 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3648 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3649 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
3651 /* Otherwise the client must be confused wanting a delegation
3652 * it already has, therefore we don't return
3653 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3658 * called with nfs4_lock_state() held.
3661 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
3663 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3664 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
3665 struct nfs4_file *fp = NULL;
3666 struct inode *ino = current_fh->fh_dentry->d_inode;
3667 struct nfs4_ol_stateid *stp = NULL;
3668 struct nfs4_delegation *dp = NULL;
3672 * Lookup file; if found, lookup stateid and check open request,
3673 * and check for delegations in the process of being recalled.
3674 * If not found, create the nfs4_file struct
3676 fp = find_or_add_file(ino, open->op_file);
3677 if (fp != open->op_file) {
3678 status = nfs4_check_deleg(cl, open, &dp);
3681 stp = nfsd4_find_existing_open(fp, open);
3683 open->op_file = NULL;
3684 status = nfserr_bad_stateid;
3685 if (nfsd4_is_deleg_cur(open))
3687 status = nfserr_jukebox;
3691 * OPEN the file, or upgrade an existing OPEN.
3692 * If truncate fails, the OPEN fails.
3695 /* Stateid was found, this is an OPEN upgrade */
3696 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
3701 open->op_stp = NULL;
3702 init_open_stateid(stp, fp, open);
3703 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
3705 release_open_stateid(stp);
3709 update_stateid(&stp->st_stid.sc_stateid);
3710 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
3712 if (nfsd4_has_session(&resp->cstate)) {
3713 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3714 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3715 open->op_why_no_deleg = WND4_NOT_WANTED;
3721 * Attempt to hand out a delegation. No error return, because the
3722 * OPEN succeeds even if we fail.
3724 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
3728 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
3729 STATEID_VAL(&stp->st_stid.sc_stateid));
3731 /* 4.1 client trying to upgrade/downgrade delegation? */
3732 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
3733 open->op_deleg_want)
3734 nfsd4_deleg_xgrade_none_ext(open, dp);
3738 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
3739 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
3741 * To finish the open response, we just need to set the rflags.
3743 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
3744 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
3745 !nfsd4_has_session(&resp->cstate))
3746 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3751 void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3753 if (open->op_openowner) {
3754 struct nfs4_openowner *oo = open->op_openowner;
3756 if (!list_empty(&oo->oo_owner.so_stateids))
3757 list_del_init(&oo->oo_close_lru);
3758 if (oo->oo_flags & NFS4_OO_NEW) {
3760 release_openowner(oo);
3761 open->op_openowner = NULL;
3763 oo->oo_flags &= ~NFS4_OO_NEW;
3767 nfsd4_free_file(open->op_file);
3769 free_generic_stateid(open->op_stp);
3773 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3776 struct nfs4_client *clp;
3778 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3781 dprintk("process_renew(%08x/%08x): starting\n",
3782 clid->cl_boot, clid->cl_id);
3783 status = lookup_clientid(clid, cstate, nn);
3787 status = nfserr_cb_path_down;
3788 if (!list_empty(&clp->cl_delegations)
3789 && clp->cl_cb_state != NFSD4_CB_UP)
3793 nfs4_unlock_state();
3798 nfsd4_end_grace(struct nfsd_net *nn)
3800 /* do nothing if grace period already ended */
3801 if (nn->grace_ended)
3804 dprintk("NFSD: end of grace period\n");
3805 nn->grace_ended = true;
3806 nfsd4_record_grace_done(nn, nn->boot_time);
3807 locks_end_grace(&nn->nfsd4_manager);
3809 * Now that every NFSv4 client has had the chance to recover and
3810 * to see the (possibly new, possibly shorter) lease time, we
3811 * can safely set the next grace time to the current lease time:
3813 nn->nfsd4_grace = nn->nfsd4_lease;
3817 nfs4_laundromat(struct nfsd_net *nn)
3819 struct nfs4_client *clp;
3820 struct nfs4_openowner *oo;
3821 struct nfs4_delegation *dp;
3822 struct list_head *pos, *next, reaplist;
3823 time_t cutoff = get_seconds() - nn->nfsd4_lease;
3824 time_t t, new_timeo = nn->nfsd4_lease;
3828 dprintk("NFSD: laundromat service - starting\n");
3829 nfsd4_end_grace(nn);
3830 INIT_LIST_HEAD(&reaplist);
3831 spin_lock(&nn->client_lock);
3832 list_for_each_safe(pos, next, &nn->client_lru) {
3833 clp = list_entry(pos, struct nfs4_client, cl_lru);
3834 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3835 t = clp->cl_time - cutoff;
3836 new_timeo = min(new_timeo, t);
3839 if (mark_client_expired_locked(clp)) {
3840 dprintk("NFSD: client in use (clientid %08x)\n",
3841 clp->cl_clientid.cl_id);
3844 list_move(&clp->cl_lru, &reaplist);
3846 spin_unlock(&nn->client_lock);
3847 list_for_each_safe(pos, next, &reaplist) {
3848 clp = list_entry(pos, struct nfs4_client, cl_lru);
3849 dprintk("NFSD: purging unused client (clientid %08x)\n",
3850 clp->cl_clientid.cl_id);
3853 spin_lock(&state_lock);
3854 list_for_each_safe(pos, next, &nn->del_recall_lru) {
3855 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3856 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
3858 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3859 t = dp->dl_time - cutoff;
3860 new_timeo = min(new_timeo, t);
3863 list_move(&dp->dl_recall_lru, &reaplist);
3865 spin_unlock(&state_lock);
3866 list_for_each_safe(pos, next, &reaplist) {
3867 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3868 revoke_delegation(dp);
3870 list_for_each_safe(pos, next, &nn->close_lru) {
3871 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3872 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3873 t = oo->oo_time - cutoff;
3874 new_timeo = min(new_timeo, t);
3877 release_openowner(oo);
3879 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
3880 nfs4_unlock_state();
3884 static struct workqueue_struct *laundry_wq;
3885 static void laundromat_main(struct work_struct *);
3888 laundromat_main(struct work_struct *laundry)
3891 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
3893 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
3896 t = nfs4_laundromat(nn);
3897 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
3898 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
3901 static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
3903 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3904 return nfserr_bad_stateid;
3909 access_permit_read(struct nfs4_ol_stateid *stp)
3911 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3912 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3913 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
3917 access_permit_write(struct nfs4_ol_stateid *stp)
3919 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3920 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
3924 __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
3926 __be32 status = nfserr_openmode;
3928 /* For lock stateid's, we test the parent open, not the lock: */
3929 if (stp->st_openstp)
3930 stp = stp->st_openstp;
3931 if ((flags & WR_STATE) && !access_permit_write(stp))
3933 if ((flags & RD_STATE) && !access_permit_read(stp))
3940 static inline __be32
3941 check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
3943 if (ONE_STATEID(stateid) && (flags & RD_STATE))
3945 else if (locks_in_grace(net)) {
3946 /* Answer in remaining cases depends on existence of
3947 * conflicting state; so we must wait out the grace period. */
3948 return nfserr_grace;
3949 } else if (flags & WR_STATE)
3950 return nfs4_share_conflict(current_fh,
3951 NFS4_SHARE_DENY_WRITE);
3952 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3953 return nfs4_share_conflict(current_fh,
3954 NFS4_SHARE_DENY_READ);
3958 * Allow READ/WRITE during grace period on recovered state only for files
3959 * that are not able to provide mandatory locking.
3962 grace_disallows_io(struct net *net, struct inode *inode)
3964 return locks_in_grace(net) && mandatory_lock(inode);
3967 /* Returns true iff a is later than b: */
3968 static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3970 return (s32)(a->si_generation - b->si_generation) > 0;
3973 static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
3976 * When sessions are used the stateid generation number is ignored
3979 if (has_session && in->si_generation == 0)
3982 if (in->si_generation == ref->si_generation)
3985 /* If the client sends us a stateid from the future, it's buggy: */
3986 if (stateid_generation_after(in, ref))
3987 return nfserr_bad_stateid;
3989 * However, we could see a stateid from the past, even from a
3990 * non-buggy client. For example, if the client sends a lock
3991 * while some IO is outstanding, the lock may bump si_generation
3992 * while the IO is still in flight. The client could avoid that
3993 * situation by waiting for responses on all the IO requests,
3994 * but better performance may result in retrying IO that
3995 * receives an old_stateid error if requests are rarely
3996 * reordered in flight:
3998 return nfserr_old_stateid;
4001 static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
4003 struct nfs4_stid *s;
4004 struct nfs4_ol_stateid *ols;
4007 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4008 return nfserr_bad_stateid;
4009 /* Client debugging aid. */
4010 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
4011 char addr_str[INET6_ADDRSTRLEN];
4012 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
4014 pr_warn_ratelimited("NFSD: client %s testing state ID "
4015 "with incorrect client ID\n", addr_str);
4016 return nfserr_bad_stateid;
4018 s = find_stateid(cl, stateid);
4020 return nfserr_bad_stateid;
4021 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
4024 switch (s->sc_type) {
4025 case NFS4_DELEG_STID:
4027 case NFS4_REVOKED_DELEG_STID:
4028 return nfserr_deleg_revoked;
4029 case NFS4_OPEN_STID:
4030 case NFS4_LOCK_STID:
4031 ols = openlockstateid(s);
4032 if (ols->st_stateowner->so_is_open_owner
4033 && !(openowner(ols->st_stateowner)->oo_flags
4034 & NFS4_OO_CONFIRMED))
4035 return nfserr_bad_stateid;
4038 printk("unknown stateid type %x\n", s->sc_type);
4039 case NFS4_CLOSED_STID:
4040 return nfserr_bad_stateid;
4045 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
4046 stateid_t *stateid, unsigned char typemask,
4047 struct nfs4_stid **s, struct nfsd_net *nn)
4051 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4052 return nfserr_bad_stateid;
4053 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
4054 if (status == nfserr_stale_clientid) {
4055 if (cstate->session)
4056 return nfserr_bad_stateid;
4057 return nfserr_stale_stateid;
4061 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
4063 return nfserr_bad_stateid;
4068 * Checks for stateid operations
4071 nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
4072 stateid_t *stateid, int flags, struct file **filpp)
4074 struct nfs4_stid *s;
4075 struct nfs4_ol_stateid *stp = NULL;
4076 struct nfs4_delegation *dp = NULL;
4077 struct svc_fh *current_fh = &cstate->current_fh;
4078 struct inode *ino = current_fh->fh_dentry->d_inode;
4079 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4080 struct file *file = NULL;
4086 if (grace_disallows_io(net, ino))
4087 return nfserr_grace;
4089 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4090 return check_special_stateids(net, current_fh, stateid, flags);
4094 status = nfsd4_lookup_stateid(cstate, stateid,
4095 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
4099 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
4102 switch (s->sc_type) {
4103 case NFS4_DELEG_STID:
4104 dp = delegstateid(s);
4105 status = nfs4_check_delegmode(dp, flags);
4109 file = dp->dl_file->fi_deleg_file;
4112 status = nfserr_serverfault;
4118 case NFS4_OPEN_STID:
4119 case NFS4_LOCK_STID:
4120 stp = openlockstateid(s);
4121 status = nfs4_check_fh(current_fh, stp);
4124 if (stp->st_stateowner->so_is_open_owner
4125 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4127 status = nfs4_check_openmode(stp, flags);
4131 if (flags & RD_STATE)
4132 file = find_readable_file(stp->st_file);
4134 file = find_writeable_file(stp->st_file);
4138 status = nfserr_bad_stateid;
4145 nfs4_unlock_state();
4150 nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
4152 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
4154 if (check_for_locks(stp->st_file, lo))
4155 return nfserr_locks_held;
4156 release_lockowner_if_empty(lo);
4161 * Test if the stateid is valid
4164 nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4165 struct nfsd4_test_stateid *test_stateid)
4167 struct nfsd4_test_stateid_id *stateid;
4168 struct nfs4_client *cl = cstate->session->se_client;
4171 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
4172 stateid->ts_id_status =
4173 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
4174 nfs4_unlock_state();
4180 nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4181 struct nfsd4_free_stateid *free_stateid)
4183 stateid_t *stateid = &free_stateid->fr_stateid;
4184 struct nfs4_stid *s;
4185 struct nfs4_delegation *dp;
4186 struct nfs4_client *cl = cstate->session->se_client;
4187 __be32 ret = nfserr_bad_stateid;
4190 s = find_stateid(cl, stateid);
4193 switch (s->sc_type) {
4194 case NFS4_DELEG_STID:
4195 ret = nfserr_locks_held;
4197 case NFS4_OPEN_STID:
4198 case NFS4_LOCK_STID:
4199 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4202 if (s->sc_type == NFS4_LOCK_STID)
4203 ret = nfsd4_free_lock_stateid(openlockstateid(s));
4205 ret = nfserr_locks_held;
4207 case NFS4_REVOKED_DELEG_STID:
4208 dp = delegstateid(s);
4209 destroy_revoked_delegation(dp);
4213 ret = nfserr_bad_stateid;
4216 nfs4_unlock_state();
4223 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
4224 RD_STATE : WR_STATE;
4227 static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
4229 struct svc_fh *current_fh = &cstate->current_fh;
4230 struct nfs4_stateowner *sop = stp->st_stateowner;
4233 status = nfsd4_check_seqid(cstate, sop, seqid);
4236 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
4237 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
4239 * "Closed" stateid's exist *only* to return
4240 * nfserr_replay_me from the previous step, and
4241 * revoked delegations are kept only for free_stateid.
4243 return nfserr_bad_stateid;
4244 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
4247 return nfs4_check_fh(current_fh, stp);
4251 * Checks for sequence id mutating operations.
4254 nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4255 stateid_t *stateid, char typemask,
4256 struct nfs4_ol_stateid **stpp,
4257 struct nfsd_net *nn)
4260 struct nfs4_stid *s;
4261 struct nfs4_ol_stateid *stp = NULL;
4263 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
4264 seqid, STATEID_VAL(stateid));
4267 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
4270 stp = openlockstateid(s);
4271 if (!nfsd4_has_session(cstate))
4272 cstate->replay_owner = stp->st_stateowner;
4274 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
4280 static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4281 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
4284 struct nfs4_openowner *oo;
4286 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
4287 NFS4_OPEN_STID, stpp, nn);
4290 oo = openowner((*stpp)->st_stateowner);
4291 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
4292 return nfserr_bad_stateid;
4297 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4298 struct nfsd4_open_confirm *oc)
4301 struct nfs4_openowner *oo;
4302 struct nfs4_ol_stateid *stp;
4303 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4305 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4306 cstate->current_fh.fh_dentry);
4308 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
4314 status = nfs4_preprocess_seqid_op(cstate,
4315 oc->oc_seqid, &oc->oc_req_stateid,
4316 NFS4_OPEN_STID, &stp, nn);
4319 oo = openowner(stp->st_stateowner);
4320 status = nfserr_bad_stateid;
4321 if (oo->oo_flags & NFS4_OO_CONFIRMED)
4323 oo->oo_flags |= NFS4_OO_CONFIRMED;
4324 update_stateid(&stp->st_stid.sc_stateid);
4325 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4326 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
4327 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
4329 nfsd4_client_record_create(oo->oo_owner.so_client);
4332 nfsd4_bump_seqid(cstate, status);
4333 if (!cstate->replay_owner)
4334 nfs4_unlock_state();
4338 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
4340 if (!test_access(access, stp))
4342 nfs4_file_put_access(stp->st_file, access);
4343 clear_access(access, stp);
4346 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
4348 switch (to_access) {
4349 case NFS4_SHARE_ACCESS_READ:
4350 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
4351 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4353 case NFS4_SHARE_ACCESS_WRITE:
4354 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
4355 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4357 case NFS4_SHARE_ACCESS_BOTH:
4365 nfsd4_open_downgrade(struct svc_rqst *rqstp,
4366 struct nfsd4_compound_state *cstate,
4367 struct nfsd4_open_downgrade *od)
4370 struct nfs4_ol_stateid *stp;
4371 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4373 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4374 cstate->current_fh.fh_dentry);
4376 /* We don't yet support WANT bits: */
4377 if (od->od_deleg_want)
4378 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
4382 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
4383 &od->od_stateid, &stp, nn);
4386 status = nfserr_inval;
4387 if (!test_access(od->od_share_access, stp)) {
4388 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
4389 stp->st_access_bmap, od->od_share_access);
4392 if (!test_deny(od->od_share_deny, stp)) {
4393 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
4394 stp->st_deny_bmap, od->od_share_deny);
4397 nfs4_stateid_downgrade(stp, od->od_share_access);
4399 reset_union_bmap_deny(od->od_share_deny, stp);
4401 update_stateid(&stp->st_stid.sc_stateid);
4402 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4405 nfsd4_bump_seqid(cstate, status);
4406 if (!cstate->replay_owner)
4407 nfs4_unlock_state();
4411 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4413 struct nfs4_client *clp = s->st_stid.sc_client;
4414 struct nfs4_openowner *oo = openowner(s->st_stateowner);
4416 s->st_stid.sc_type = NFS4_CLOSED_STID;
4417 unhash_open_stateid(s);
4419 if (clp->cl_minorversion) {
4420 free_generic_stateid(s);
4421 if (list_empty(&oo->oo_owner.so_stateids))
4422 release_openowner(oo);
4424 oo->oo_last_closed_stid = s;
4426 * In the 4.0 case we need to keep the owners around a
4427 * little while to handle CLOSE replay.
4429 if (list_empty(&oo->oo_owner.so_stateids))
4430 move_to_close_lru(oo, clp->net);
4435 * nfs4_unlock_state() called after encode
4438 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4439 struct nfsd4_close *close)
4442 struct nfs4_ol_stateid *stp;
4443 struct net *net = SVC_NET(rqstp);
4444 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4446 dprintk("NFSD: nfsd4_close on file %pd\n",
4447 cstate->current_fh.fh_dentry);
4450 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
4452 NFS4_OPEN_STID|NFS4_CLOSED_STID,
4454 nfsd4_bump_seqid(cstate, status);
4457 update_stateid(&stp->st_stid.sc_stateid);
4458 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4460 nfsd4_close_open_stateid(stp);
4462 if (!cstate->replay_owner)
4463 nfs4_unlock_state();
4468 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4469 struct nfsd4_delegreturn *dr)
4471 struct nfs4_delegation *dp;
4472 stateid_t *stateid = &dr->dr_stateid;
4473 struct nfs4_stid *s;
4475 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4477 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4481 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
4484 dp = delegstateid(s);
4485 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
4489 destroy_delegation(dp);
4491 nfs4_unlock_state();
4497 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4500 end_offset(u64 start, u64 len)
4505 return end >= start ? end: NFS4_MAX_UINT64;
4508 /* last octet in a range */
4510 last_byte_offset(u64 start, u64 len)
4516 return end > start ? end - 1: NFS4_MAX_UINT64;
4520 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4521 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4522 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4523 * locking, this prevents us from being completely protocol-compliant. The
4524 * real solution to this problem is to start using unsigned file offsets in
4525 * the VFS, but this is a very deep change!
4528 nfs4_transform_lock_offset(struct file_lock *lock)
4530 if (lock->fl_start < 0)
4531 lock->fl_start = OFFSET_MAX;
4532 if (lock->fl_end < 0)
4533 lock->fl_end = OFFSET_MAX;
4536 /* Hack!: For now, we're defining this just so we can use a pointer to it
4537 * as a unique cookie to identify our (NFSv4's) posix locks. */
4538 static const struct lock_manager_operations nfsd_posix_mng_ops = {
4542 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
4544 struct nfs4_lockowner *lo;
4546 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
4547 lo = (struct nfs4_lockowner *) fl->fl_owner;
4548 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
4549 lo->lo_owner.so_owner.len, GFP_KERNEL);
4550 if (!deny->ld_owner.data)
4551 /* We just don't care that much */
4553 deny->ld_owner.len = lo->lo_owner.so_owner.len;
4554 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
4557 deny->ld_owner.len = 0;
4558 deny->ld_owner.data = NULL;
4559 deny->ld_clientid.cl_boot = 0;
4560 deny->ld_clientid.cl_id = 0;
4562 deny->ld_start = fl->fl_start;
4563 deny->ld_length = NFS4_MAX_UINT64;
4564 if (fl->fl_end != NFS4_MAX_UINT64)
4565 deny->ld_length = fl->fl_end - fl->fl_start + 1;
4566 deny->ld_type = NFS4_READ_LT;
4567 if (fl->fl_type != F_RDLCK)
4568 deny->ld_type = NFS4_WRITE_LT;
4571 static struct nfs4_lockowner *
4572 find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
4573 struct nfsd_net *nn)
4575 unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner);
4576 struct nfs4_stateowner *so;
4578 list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) {
4579 if (so->so_is_open_owner)
4581 if (!same_owner_str(so, owner, clid))
4583 return lockowner(so);
4589 * Alloc a lock owner structure.
4590 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4593 * strhashval = ownerstr_hashval
4595 static struct nfs4_lockowner *
4596 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) {
4597 struct nfs4_lockowner *lo;
4598 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
4600 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
4603 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
4604 lo->lo_owner.so_is_open_owner = 0;
4605 /* It is the openowner seqid that will be incremented in encode in the
4606 * case of new lockowners; so increment the lock seqid manually: */
4607 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
4608 list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
4612 static struct nfs4_ol_stateid *
4613 alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
4615 struct nfs4_ol_stateid *stp;
4616 struct nfs4_client *clp = lo->lo_owner.so_client;
4618 stp = nfs4_alloc_stateid(clp);
4621 stp->st_stid.sc_type = NFS4_LOCK_STID;
4622 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
4623 stp->st_stateowner = &lo->lo_owner;
4626 stp->st_access_bmap = 0;
4627 stp->st_deny_bmap = open_stp->st_deny_bmap;
4628 stp->st_openstp = open_stp;
4629 list_add(&stp->st_locks, &open_stp->st_locks);
4630 spin_lock(&fp->fi_lock);
4631 list_add(&stp->st_perfile, &fp->fi_stateids);
4632 spin_unlock(&fp->fi_lock);
4636 static struct nfs4_ol_stateid *
4637 find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
4639 struct nfs4_ol_stateid *lst;
4641 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
4642 if (lst->st_file == fp)
4650 check_lock_length(u64 offset, u64 length)
4652 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
4653 LOFF_OVERFLOW(offset, length)));
4656 static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
4658 struct nfs4_file *fp = lock_stp->st_file;
4660 lockdep_assert_held(&fp->fi_lock);
4662 if (test_access(access, lock_stp))
4664 __nfs4_file_get_access(fp, access);
4665 set_access(access, lock_stp);
4668 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)
4670 struct nfs4_file *fi = ost->st_file;
4671 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4672 struct nfs4_client *cl = oo->oo_owner.so_client;
4673 struct nfs4_lockowner *lo;
4674 unsigned int strhashval;
4675 struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
4677 lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn);
4679 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
4680 &lock->v.new.owner);
4681 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4683 return nfserr_jukebox;
4685 /* with an existing lockowner, seqids must be the same */
4686 if (!cstate->minorversion &&
4687 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
4688 return nfserr_bad_seqid;
4691 *lst = find_lock_stateid(lo, fi);
4693 *lst = alloc_init_lock_stateid(lo, fi, ost);
4695 release_lockowner_if_empty(lo);
4696 return nfserr_jukebox;
4707 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4708 struct nfsd4_lock *lock)
4710 struct nfs4_openowner *open_sop = NULL;
4711 struct nfs4_lockowner *lock_sop = NULL;
4712 struct nfs4_ol_stateid *lock_stp;
4713 struct nfs4_file *fp;
4714 struct file *filp = NULL;
4715 struct file_lock *file_lock = NULL;
4716 struct file_lock *conflock = NULL;
4718 bool new_state = false;
4721 struct net *net = SVC_NET(rqstp);
4722 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4724 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4725 (long long) lock->lk_offset,
4726 (long long) lock->lk_length);
4728 if (check_lock_length(lock->lk_offset, lock->lk_length))
4729 return nfserr_inval;
4731 if ((status = fh_verify(rqstp, &cstate->current_fh,
4732 S_IFREG, NFSD_MAY_LOCK))) {
4733 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4739 if (lock->lk_is_new) {
4740 struct nfs4_ol_stateid *open_stp = NULL;
4742 if (nfsd4_has_session(cstate))
4743 /* See rfc 5661 18.10.3: given clientid is ignored: */
4744 memcpy(&lock->v.new.clientid,
4745 &cstate->session->se_client->cl_clientid,
4746 sizeof(clientid_t));
4748 status = nfserr_stale_clientid;
4749 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
4752 /* validate and update open stateid and open seqid */
4753 status = nfs4_preprocess_confirmed_seqid_op(cstate,
4754 lock->lk_new_open_seqid,
4755 &lock->lk_new_open_stateid,
4759 open_sop = openowner(open_stp->st_stateowner);
4760 status = nfserr_bad_stateid;
4761 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
4762 &lock->v.new.clientid))
4764 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4765 &lock_stp, &new_state);
4767 status = nfs4_preprocess_seqid_op(cstate,
4768 lock->lk_old_lock_seqid,
4769 &lock->lk_old_lock_stateid,
4770 NFS4_LOCK_STID, &lock_stp, nn);
4773 lock_sop = lockowner(lock_stp->st_stateowner);
4775 lkflg = setlkflg(lock->lk_type);
4776 status = nfs4_check_openmode(lock_stp, lkflg);
4780 status = nfserr_grace;
4781 if (locks_in_grace(net) && !lock->lk_reclaim)
4783 status = nfserr_no_grace;
4784 if (!locks_in_grace(net) && lock->lk_reclaim)
4787 file_lock = locks_alloc_lock();
4789 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4790 status = nfserr_jukebox;
4794 fp = lock_stp->st_file;
4795 locks_init_lock(file_lock);
4796 switch (lock->lk_type) {
4799 spin_lock(&fp->fi_lock);
4800 filp = find_readable_file_locked(fp);
4802 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
4803 spin_unlock(&fp->fi_lock);
4804 file_lock->fl_type = F_RDLCK;
4807 case NFS4_WRITEW_LT:
4808 spin_lock(&fp->fi_lock);
4809 filp = find_writeable_file_locked(fp);
4811 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
4812 spin_unlock(&fp->fi_lock);
4813 file_lock->fl_type = F_WRLCK;
4816 status = nfserr_inval;
4820 status = nfserr_openmode;
4823 file_lock->fl_owner = (fl_owner_t)lock_sop;
4824 file_lock->fl_pid = current->tgid;
4825 file_lock->fl_file = filp;
4826 file_lock->fl_flags = FL_POSIX;
4827 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4828 file_lock->fl_start = lock->lk_offset;
4829 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4830 nfs4_transform_lock_offset(file_lock);
4832 conflock = locks_alloc_lock();
4834 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4835 status = nfserr_jukebox;
4839 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
4841 case 0: /* success! */
4842 update_stateid(&lock_stp->st_stid.sc_stateid);
4843 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
4847 case (EAGAIN): /* conflock holds conflicting lock */
4848 status = nfserr_denied;
4849 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4850 nfs4_set_lock_denied(conflock, &lock->lk_denied);
4853 status = nfserr_deadlock;
4856 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
4857 status = nfserrno(err);
4863 if (status && new_state)
4864 release_lock_stateid(lock_stp);
4865 nfsd4_bump_seqid(cstate, status);
4866 if (!cstate->replay_owner)
4867 nfs4_unlock_state();
4869 locks_free_lock(file_lock);
4871 locks_free_lock(conflock);
4876 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4877 * so we do a temporary open here just to get an open file to pass to
4878 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4881 static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
4884 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4886 err = nfserrno(vfs_test_lock(file, lock));
4896 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4897 struct nfsd4_lockt *lockt)
4899 struct file_lock *file_lock = NULL;
4900 struct nfs4_lockowner *lo;
4902 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4904 if (locks_in_grace(SVC_NET(rqstp)))
4905 return nfserr_grace;
4907 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4908 return nfserr_inval;
4912 if (!nfsd4_has_session(cstate)) {
4913 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
4918 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4921 file_lock = locks_alloc_lock();
4923 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4924 status = nfserr_jukebox;
4927 locks_init_lock(file_lock);
4928 switch (lockt->lt_type) {
4931 file_lock->fl_type = F_RDLCK;
4934 case NFS4_WRITEW_LT:
4935 file_lock->fl_type = F_WRLCK;
4938 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4939 status = nfserr_inval;
4943 lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn);
4945 file_lock->fl_owner = (fl_owner_t)lo;
4946 file_lock->fl_pid = current->tgid;
4947 file_lock->fl_flags = FL_POSIX;
4949 file_lock->fl_start = lockt->lt_offset;
4950 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
4952 nfs4_transform_lock_offset(file_lock);
4954 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
4958 if (file_lock->fl_type != F_UNLCK) {
4959 status = nfserr_denied;
4960 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
4963 nfs4_unlock_state();
4965 locks_free_lock(file_lock);
4970 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4971 struct nfsd4_locku *locku)
4973 struct nfs4_ol_stateid *stp;
4974 struct file *filp = NULL;
4975 struct file_lock *file_lock = NULL;
4978 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4980 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4981 (long long) locku->lu_offset,
4982 (long long) locku->lu_length);
4984 if (check_lock_length(locku->lu_offset, locku->lu_length))
4985 return nfserr_inval;
4989 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
4990 &locku->lu_stateid, NFS4_LOCK_STID,
4994 filp = find_any_file(stp->st_file);
4996 status = nfserr_lock_range;
4999 file_lock = locks_alloc_lock();
5001 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5002 status = nfserr_jukebox;
5005 locks_init_lock(file_lock);
5006 file_lock->fl_type = F_UNLCK;
5007 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
5008 file_lock->fl_pid = current->tgid;
5009 file_lock->fl_file = filp;
5010 file_lock->fl_flags = FL_POSIX;
5011 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5012 file_lock->fl_start = locku->lu_offset;
5014 file_lock->fl_end = last_byte_offset(locku->lu_offset,
5016 nfs4_transform_lock_offset(file_lock);
5018 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
5020 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
5023 update_stateid(&stp->st_stid.sc_stateid);
5024 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
5028 nfsd4_bump_seqid(cstate, status);
5029 if (!cstate->replay_owner)
5030 nfs4_unlock_state();
5032 locks_free_lock(file_lock);
5036 status = nfserrno(err);
5042 * 1: locks held by lockowner
5043 * 0: no locks held by lockowner
5046 check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
5048 struct file_lock **flpp;
5049 struct inode *inode = filp->fi_inode;
5052 spin_lock(&inode->i_lock);
5053 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
5054 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
5060 spin_unlock(&inode->i_lock);
5065 nfsd4_release_lockowner(struct svc_rqst *rqstp,
5066 struct nfsd4_compound_state *cstate,
5067 struct nfsd4_release_lockowner *rlockowner)
5069 clientid_t *clid = &rlockowner->rl_clientid;
5070 struct nfs4_stateowner *sop = NULL, *tmp;
5071 struct nfs4_lockowner *lo;
5072 struct nfs4_ol_stateid *stp;
5073 struct xdr_netobj *owner = &rlockowner->rl_owner;
5074 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
5076 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5078 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5079 clid->cl_boot, clid->cl_id);
5083 status = lookup_clientid(clid, cstate, nn);
5087 status = nfserr_locks_held;
5089 /* Find the matching lock stateowner */
5090 list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) {
5091 if (tmp->so_is_open_owner)
5093 if (same_owner_str(tmp, owner, clid)) {
5099 /* No matching owner found, maybe a replay? Just declare victory... */
5105 lo = lockowner(sop);
5106 /* see if there are still any locks associated with it */
5107 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
5108 if (check_for_locks(stp->st_file, lo))
5113 release_lockowner(lo);
5115 nfs4_unlock_state();
5119 static inline struct nfs4_client_reclaim *
5122 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
5126 nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
5128 struct nfs4_client_reclaim *crp;
5130 crp = nfsd4_find_reclaim_client(name, nn);
5131 return (crp && crp->cr_clp);
5135 * failure => all reset bets are off, nfserr_no_grace...
5137 struct nfs4_client_reclaim *
5138 nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
5140 unsigned int strhashval;
5141 struct nfs4_client_reclaim *crp;
5143 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
5144 crp = alloc_reclaim();
5146 strhashval = clientstr_hashval(name);
5147 INIT_LIST_HEAD(&crp->cr_strhash);
5148 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
5149 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
5151 nn->reclaim_str_hashtbl_size++;
5157 nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
5159 list_del(&crp->cr_strhash);
5161 nn->reclaim_str_hashtbl_size--;
5165 nfs4_release_reclaim(struct nfsd_net *nn)
5167 struct nfs4_client_reclaim *crp = NULL;
5170 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5171 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
5172 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
5173 struct nfs4_client_reclaim, cr_strhash);
5174 nfs4_remove_reclaim_record(crp, nn);
5177 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
5181 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
5182 struct nfs4_client_reclaim *
5183 nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
5185 unsigned int strhashval;
5186 struct nfs4_client_reclaim *crp = NULL;
5188 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
5190 strhashval = clientstr_hashval(recdir);
5191 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
5192 if (same_name(crp->cr_recdir, recdir)) {
5200 * Called from OPEN. Look for clientid in reclaim list.
5203 nfs4_check_open_reclaim(clientid_t *clid,
5204 struct nfsd4_compound_state *cstate,
5205 struct nfsd_net *nn)
5209 /* find clientid in conf_id_hashtbl */
5210 status = lookup_clientid(clid, cstate, nn);
5212 return nfserr_reclaim_bad;
5214 if (nfsd4_client_record_check(cstate->clp))
5215 return nfserr_reclaim_bad;
5220 #ifdef CONFIG_NFSD_FAULT_INJECTION
5222 u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
5224 if (mark_client_expired(clp))
5230 u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
5232 char buf[INET6_ADDRSTRLEN];
5233 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5234 printk(KERN_INFO "NFS Client: %s\n", buf);
5238 static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
5241 char buf[INET6_ADDRSTRLEN];
5242 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5243 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
5246 static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
5247 void (*func)(struct nfs4_ol_stateid *))
5249 struct nfs4_openowner *oop;
5250 struct nfs4_ol_stateid *stp, *st_next;
5251 struct nfs4_ol_stateid *lst, *lst_next;
5254 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
5255 list_for_each_entry_safe(stp, st_next,
5256 &oop->oo_owner.so_stateids, st_perstateowner) {
5257 list_for_each_entry_safe(lst, lst_next,
5258 &stp->st_locks, st_locks) {
5270 u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
5272 return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
5275 u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
5277 u64 count = nfsd_foreach_client_lock(clp, max, NULL);
5278 nfsd_print_count(clp, count, "locked files");
5282 static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
5284 struct nfs4_openowner *oop, *next;
5287 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
5297 u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
5299 return nfsd_foreach_client_open(clp, max, release_openowner);
5302 u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
5304 u64 count = nfsd_foreach_client_open(clp, max, NULL);
5305 nfsd_print_count(clp, count, "open files");
5309 static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
5310 struct list_head *victims)
5312 struct nfs4_delegation *dp, *next;
5315 lockdep_assert_held(&state_lock);
5316 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
5319 * It's not safe to mess with delegations that have a
5320 * non-zero dl_time. They might have already been broken
5321 * and could be processed by the laundromat outside of
5322 * the state_lock. Just leave them be.
5324 if (dp->dl_time != 0)
5328 * Increment dl_time to ensure that delegation breaks
5329 * don't monkey with it now that we are.
5332 list_move(&dp->dl_recall_lru, victims);
5340 u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
5342 struct nfs4_delegation *dp, *next;
5346 spin_lock(&state_lock);
5347 count = nfsd_find_all_delegations(clp, max, &victims);
5348 spin_unlock(&state_lock);
5350 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
5351 revoke_delegation(dp);
5356 u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
5358 struct nfs4_delegation *dp;
5362 spin_lock(&state_lock);
5363 count = nfsd_find_all_delegations(clp, max, &victims);
5364 while (!list_empty(&victims)) {
5365 dp = list_first_entry(&victims, struct nfs4_delegation,
5367 list_del_init(&dp->dl_recall_lru);
5369 nfsd_break_one_deleg(dp);
5371 spin_unlock(&state_lock);
5376 u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
5380 spin_lock(&state_lock);
5381 count = nfsd_find_all_delegations(clp, max, NULL);
5382 spin_unlock(&state_lock);
5384 nfsd_print_count(clp, count, "delegations");
5388 u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
5390 struct nfs4_client *clp, *next;
5392 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5394 if (!nfsd_netns_ready(nn))
5397 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
5398 count += func(clp, max - count);
5399 if ((max != 0) && (count >= max))
5406 struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
5408 struct nfs4_client *clp;
5409 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5411 if (!nfsd_netns_ready(nn))
5414 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
5415 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
5421 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5424 * Since the lifetime of a delegation isn't limited to that of an open, a
5425 * client may quite reasonably hang on to a delegation as long as it has
5426 * the inode cached. This becomes an obvious problem the first time a
5427 * client's inode cache approaches the size of the server's total memory.
5429 * For now we avoid this problem by imposing a hard limit on the number
5430 * of delegations, which varies according to the server's memory size.
5433 set_max_delegations(void)
5436 * Allow at most 4 delegations per megabyte of RAM. Quick
5437 * estimates suggest that in the worst case (where every delegation
5438 * is for a different inode), a delegation could take about 1.5K,
5439 * giving a worst case usage of about 6% of memory.
5441 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
5444 static int nfs4_state_create_net(struct net *net)
5446 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5449 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5450 CLIENT_HASH_SIZE, GFP_KERNEL);
5451 if (!nn->conf_id_hashtbl)
5453 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5454 CLIENT_HASH_SIZE, GFP_KERNEL);
5455 if (!nn->unconf_id_hashtbl)
5457 nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
5458 OWNER_HASH_SIZE, GFP_KERNEL);
5459 if (!nn->ownerstr_hashtbl)
5461 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
5462 SESSION_HASH_SIZE, GFP_KERNEL);
5463 if (!nn->sessionid_hashtbl)
5466 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5467 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
5468 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
5470 for (i = 0; i < OWNER_HASH_SIZE; i++)
5471 INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
5472 for (i = 0; i < SESSION_HASH_SIZE; i++)
5473 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
5474 nn->conf_name_tree = RB_ROOT;
5475 nn->unconf_name_tree = RB_ROOT;
5476 INIT_LIST_HEAD(&nn->client_lru);
5477 INIT_LIST_HEAD(&nn->close_lru);
5478 INIT_LIST_HEAD(&nn->del_recall_lru);
5479 spin_lock_init(&nn->client_lock);
5481 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
5487 kfree(nn->ownerstr_hashtbl);
5489 kfree(nn->unconf_id_hashtbl);
5491 kfree(nn->conf_id_hashtbl);
5497 nfs4_state_destroy_net(struct net *net)
5500 struct nfs4_client *clp = NULL;
5501 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5503 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5504 while (!list_empty(&nn->conf_id_hashtbl[i])) {
5505 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5506 destroy_client(clp);
5510 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5511 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
5512 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5513 destroy_client(clp);
5517 kfree(nn->sessionid_hashtbl);
5518 kfree(nn->ownerstr_hashtbl);
5519 kfree(nn->unconf_id_hashtbl);
5520 kfree(nn->conf_id_hashtbl);
5525 nfs4_state_start_net(struct net *net)
5527 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5530 ret = nfs4_state_create_net(net);
5533 nfsd4_client_tracking_init(net);
5534 nn->boot_time = get_seconds();
5535 locks_start_grace(net, &nn->nfsd4_manager);
5536 nn->grace_ended = false;
5537 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
5538 nn->nfsd4_grace, net);
5539 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
5543 /* initialization to perform when the nfsd service is started: */
5546 nfs4_state_start(void)
5550 ret = set_callback_cred();
5553 laundry_wq = create_singlethread_workqueue("nfsd4");
5554 if (laundry_wq == NULL) {
5558 ret = nfsd4_create_callback_queue();
5560 goto out_free_laundry;
5562 set_max_delegations();
5567 destroy_workqueue(laundry_wq);
5573 nfs4_state_shutdown_net(struct net *net)
5575 struct nfs4_delegation *dp = NULL;
5576 struct list_head *pos, *next, reaplist;
5577 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5579 cancel_delayed_work_sync(&nn->laundromat_work);
5580 locks_end_grace(&nn->nfsd4_manager);
5583 INIT_LIST_HEAD(&reaplist);
5584 spin_lock(&state_lock);
5585 list_for_each_safe(pos, next, &nn->del_recall_lru) {
5586 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5587 list_move(&dp->dl_recall_lru, &reaplist);
5589 spin_unlock(&state_lock);
5590 list_for_each_safe(pos, next, &reaplist) {
5591 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5592 destroy_delegation(dp);
5595 nfsd4_client_tracking_exit(net);
5596 nfs4_state_destroy_net(net);
5597 nfs4_unlock_state();
5601 nfs4_state_shutdown(void)
5603 destroy_workqueue(laundry_wq);
5604 nfsd4_destroy_callback_queue();
5608 get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5610 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
5611 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
5615 put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5617 if (cstate->minorversion) {
5618 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
5619 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5624 clear_current_stateid(struct nfsd4_compound_state *cstate)
5626 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5630 * functions to set current state id
5633 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5635 put_stateid(cstate, &odp->od_stateid);
5639 nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
5641 put_stateid(cstate, &open->op_stateid);
5645 nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5647 put_stateid(cstate, &close->cl_stateid);
5651 nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
5653 put_stateid(cstate, &lock->lk_resp_stateid);
5657 * functions to consume current state id
5661 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5663 get_stateid(cstate, &odp->od_stateid);
5667 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
5669 get_stateid(cstate, &drp->dr_stateid);
5673 nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
5675 get_stateid(cstate, &fsp->fr_stateid);
5679 nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
5681 get_stateid(cstate, &setattr->sa_stateid);
5685 nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5687 get_stateid(cstate, &close->cl_stateid);
5691 nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
5693 get_stateid(cstate, &locku->lu_stateid);
5697 nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
5699 get_stateid(cstate, &read->rd_stateid);
5703 nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
5705 get_stateid(cstate, &write->wr_stateid);