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35#include <linux/file.h>
36#include <linux/fs.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/jhash.h>
45#include "xdr4.h"
46#include "xdr4cb.h"
47#include "vfs.h"
48#include "current_stateid.h"
49
50#include "netns.h"
51#include "pnfs.h"
52
53#define NFSDDBG_FACILITY NFSDDBG_PROC
54
55#define all_ones {{~0,~0},~0}
56static const stateid_t one_stateid = {
57 .si_generation = ~0,
58 .si_opaque = all_ones,
59};
60static const stateid_t zero_stateid = {
61
62};
63static const stateid_t currentstateid = {
64 .si_generation = 1,
65};
66static const stateid_t close_stateid = {
67 .si_generation = 0xffffffffU,
68};
69
70static u64 current_sessionid = 1;
71
72#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
73#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
74#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
75#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
76
77
78static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
79static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
80
81
82
83
84
85
86
87
88static DEFINE_SPINLOCK(state_lock);
89
90enum nfsd4_st_mutex_lock_subclass {
91 OPEN_STATEID_MUTEX = 0,
92 LOCK_STATEID_MUTEX = 1,
93};
94
95
96
97
98
99static DECLARE_WAIT_QUEUE_HEAD(close_wq);
100
101static struct kmem_cache *client_slab;
102static struct kmem_cache *openowner_slab;
103static struct kmem_cache *lockowner_slab;
104static struct kmem_cache *file_slab;
105static struct kmem_cache *stateid_slab;
106static struct kmem_cache *deleg_slab;
107static struct kmem_cache *odstate_slab;
108
109static void free_session(struct nfsd4_session *);
110
111static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
112static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
113
114static bool is_session_dead(struct nfsd4_session *ses)
115{
116 return ses->se_flags & NFS4_SESSION_DEAD;
117}
118
119static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
120{
121 if (atomic_read(&ses->se_ref) > ref_held_by_me)
122 return nfserr_jukebox;
123 ses->se_flags |= NFS4_SESSION_DEAD;
124 return nfs_ok;
125}
126
127static bool is_client_expired(struct nfs4_client *clp)
128{
129 return clp->cl_time == 0;
130}
131
132static __be32 get_client_locked(struct nfs4_client *clp)
133{
134 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
135
136 lockdep_assert_held(&nn->client_lock);
137
138 if (is_client_expired(clp))
139 return nfserr_expired;
140 atomic_inc(&clp->cl_refcount);
141 return nfs_ok;
142}
143
144
145static inline void
146renew_client_locked(struct nfs4_client *clp)
147{
148 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
149
150 if (is_client_expired(clp)) {
151 WARN_ON(1);
152 printk("%s: client (clientid %08x/%08x) already expired\n",
153 __func__,
154 clp->cl_clientid.cl_boot,
155 clp->cl_clientid.cl_id);
156 return;
157 }
158
159 dprintk("renewing client (clientid %08x/%08x)\n",
160 clp->cl_clientid.cl_boot,
161 clp->cl_clientid.cl_id);
162 list_move_tail(&clp->cl_lru, &nn->client_lru);
163 clp->cl_time = get_seconds();
164}
165
166static void put_client_renew_locked(struct nfs4_client *clp)
167{
168 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
169
170 lockdep_assert_held(&nn->client_lock);
171
172 if (!atomic_dec_and_test(&clp->cl_refcount))
173 return;
174 if (!is_client_expired(clp))
175 renew_client_locked(clp);
176}
177
178static void put_client_renew(struct nfs4_client *clp)
179{
180 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
181
182 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
183 return;
184 if (!is_client_expired(clp))
185 renew_client_locked(clp);
186 spin_unlock(&nn->client_lock);
187}
188
189static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
190{
191 __be32 status;
192
193 if (is_session_dead(ses))
194 return nfserr_badsession;
195 status = get_client_locked(ses->se_client);
196 if (status)
197 return status;
198 atomic_inc(&ses->se_ref);
199 return nfs_ok;
200}
201
202static void nfsd4_put_session_locked(struct nfsd4_session *ses)
203{
204 struct nfs4_client *clp = ses->se_client;
205 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
206
207 lockdep_assert_held(&nn->client_lock);
208
209 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
210 free_session(ses);
211 put_client_renew_locked(clp);
212}
213
214static void nfsd4_put_session(struct nfsd4_session *ses)
215{
216 struct nfs4_client *clp = ses->se_client;
217 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
218
219 spin_lock(&nn->client_lock);
220 nfsd4_put_session_locked(ses);
221 spin_unlock(&nn->client_lock);
222}
223
224static struct nfsd4_blocked_lock *
225find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
226 struct nfsd_net *nn)
227{
228 struct nfsd4_blocked_lock *cur, *found = NULL;
229
230 spin_lock(&nn->blocked_locks_lock);
231 list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
232 if (fh_match(fh, &cur->nbl_fh)) {
233 list_del_init(&cur->nbl_list);
234 list_del_init(&cur->nbl_lru);
235 found = cur;
236 break;
237 }
238 }
239 spin_unlock(&nn->blocked_locks_lock);
240 if (found)
241 posix_unblock_lock(&found->nbl_lock);
242 return found;
243}
244
245static struct nfsd4_blocked_lock *
246find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
247 struct nfsd_net *nn)
248{
249 struct nfsd4_blocked_lock *nbl;
250
251 nbl = find_blocked_lock(lo, fh, nn);
252 if (!nbl) {
253 nbl= kmalloc(sizeof(*nbl), GFP_KERNEL);
254 if (nbl) {
255 fh_copy_shallow(&nbl->nbl_fh, fh);
256 locks_init_lock(&nbl->nbl_lock);
257 nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,
258 &nfsd4_cb_notify_lock_ops,
259 NFSPROC4_CLNT_CB_NOTIFY_LOCK);
260 }
261 }
262 return nbl;
263}
264
265static void
266free_blocked_lock(struct nfsd4_blocked_lock *nbl)
267{
268 locks_release_private(&nbl->nbl_lock);
269 kfree(nbl);
270}
271
272static void
273remove_blocked_locks(struct nfs4_lockowner *lo)
274{
275 struct nfs4_client *clp = lo->lo_owner.so_client;
276 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
277 struct nfsd4_blocked_lock *nbl;
278 LIST_HEAD(reaplist);
279
280
281 spin_lock(&nn->blocked_locks_lock);
282 while (!list_empty(&lo->lo_blocked)) {
283 nbl = list_first_entry(&lo->lo_blocked,
284 struct nfsd4_blocked_lock,
285 nbl_list);
286 list_del_init(&nbl->nbl_list);
287 list_move(&nbl->nbl_lru, &reaplist);
288 }
289 spin_unlock(&nn->blocked_locks_lock);
290
291
292 while (!list_empty(&reaplist)) {
293 nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock,
294 nbl_lru);
295 list_del_init(&nbl->nbl_lru);
296 posix_unblock_lock(&nbl->nbl_lock);
297 free_blocked_lock(nbl);
298 }
299}
300
301static int
302nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
303{
304
305
306
307
308
309 switch (task->tk_status) {
310 case -NFS4ERR_DELAY:
311 rpc_delay(task, 1 * HZ);
312 return 0;
313 default:
314 return 1;
315 }
316}
317
318static void
319nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb)
320{
321 struct nfsd4_blocked_lock *nbl = container_of(cb,
322 struct nfsd4_blocked_lock, nbl_cb);
323
324 free_blocked_lock(nbl);
325}
326
327static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
328 .done = nfsd4_cb_notify_lock_done,
329 .release = nfsd4_cb_notify_lock_release,
330};
331
332static inline struct nfs4_stateowner *
333nfs4_get_stateowner(struct nfs4_stateowner *sop)
334{
335 atomic_inc(&sop->so_count);
336 return sop;
337}
338
339static int
340same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
341{
342 return (sop->so_owner.len == owner->len) &&
343 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
344}
345
346static struct nfs4_openowner *
347find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
348 struct nfs4_client *clp)
349{
350 struct nfs4_stateowner *so;
351
352 lockdep_assert_held(&clp->cl_lock);
353
354 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
355 so_strhash) {
356 if (!so->so_is_open_owner)
357 continue;
358 if (same_owner_str(so, &open->op_owner))
359 return openowner(nfs4_get_stateowner(so));
360 }
361 return NULL;
362}
363
364static struct nfs4_openowner *
365find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
366 struct nfs4_client *clp)
367{
368 struct nfs4_openowner *oo;
369
370 spin_lock(&clp->cl_lock);
371 oo = find_openstateowner_str_locked(hashval, open, clp);
372 spin_unlock(&clp->cl_lock);
373 return oo;
374}
375
376static inline u32
377opaque_hashval(const void *ptr, int nbytes)
378{
379 unsigned char *cptr = (unsigned char *) ptr;
380
381 u32 x = 0;
382 while (nbytes--) {
383 x *= 37;
384 x += *cptr++;
385 }
386 return x;
387}
388
389static void nfsd4_free_file_rcu(struct rcu_head *rcu)
390{
391 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
392
393 kmem_cache_free(file_slab, fp);
394}
395
396void
397put_nfs4_file(struct nfs4_file *fi)
398{
399 might_lock(&state_lock);
400
401 if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {
402 hlist_del_rcu(&fi->fi_hash);
403 spin_unlock(&state_lock);
404 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
405 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
406 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
407 }
408}
409
410static struct file *
411__nfs4_get_fd(struct nfs4_file *f, int oflag)
412{
413 if (f->fi_fds[oflag])
414 return get_file(f->fi_fds[oflag]);
415 return NULL;
416}
417
418static struct file *
419find_writeable_file_locked(struct nfs4_file *f)
420{
421 struct file *ret;
422
423 lockdep_assert_held(&f->fi_lock);
424
425 ret = __nfs4_get_fd(f, O_WRONLY);
426 if (!ret)
427 ret = __nfs4_get_fd(f, O_RDWR);
428 return ret;
429}
430
431static struct file *
432find_writeable_file(struct nfs4_file *f)
433{
434 struct file *ret;
435
436 spin_lock(&f->fi_lock);
437 ret = find_writeable_file_locked(f);
438 spin_unlock(&f->fi_lock);
439
440 return ret;
441}
442
443static struct file *find_readable_file_locked(struct nfs4_file *f)
444{
445 struct file *ret;
446
447 lockdep_assert_held(&f->fi_lock);
448
449 ret = __nfs4_get_fd(f, O_RDONLY);
450 if (!ret)
451 ret = __nfs4_get_fd(f, O_RDWR);
452 return ret;
453}
454
455static struct file *
456find_readable_file(struct nfs4_file *f)
457{
458 struct file *ret;
459
460 spin_lock(&f->fi_lock);
461 ret = find_readable_file_locked(f);
462 spin_unlock(&f->fi_lock);
463
464 return ret;
465}
466
467struct file *
468find_any_file(struct nfs4_file *f)
469{
470 struct file *ret;
471
472 spin_lock(&f->fi_lock);
473 ret = __nfs4_get_fd(f, O_RDWR);
474 if (!ret) {
475 ret = __nfs4_get_fd(f, O_WRONLY);
476 if (!ret)
477 ret = __nfs4_get_fd(f, O_RDONLY);
478 }
479 spin_unlock(&f->fi_lock);
480 return ret;
481}
482
483static atomic_long_t num_delegations;
484unsigned long max_delegations;
485
486
487
488
489
490
491#define OWNER_HASH_BITS 8
492#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
493#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
494
495static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
496{
497 unsigned int ret;
498
499 ret = opaque_hashval(ownername->data, ownername->len);
500 return ret & OWNER_HASH_MASK;
501}
502
503
504#define FILE_HASH_BITS 8
505#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
506
507static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
508{
509 return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
510}
511
512static unsigned int file_hashval(struct knfsd_fh *fh)
513{
514 return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
515}
516
517static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
518
519static void
520__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
521{
522 lockdep_assert_held(&fp->fi_lock);
523
524 if (access & NFS4_SHARE_ACCESS_WRITE)
525 atomic_inc(&fp->fi_access[O_WRONLY]);
526 if (access & NFS4_SHARE_ACCESS_READ)
527 atomic_inc(&fp->fi_access[O_RDONLY]);
528}
529
530static __be32
531nfs4_file_get_access(struct nfs4_file *fp, u32 access)
532{
533 lockdep_assert_held(&fp->fi_lock);
534
535
536 if (access & ~NFS4_SHARE_ACCESS_BOTH)
537 return nfserr_inval;
538
539
540 if ((access & fp->fi_share_deny) != 0)
541 return nfserr_share_denied;
542
543 __nfs4_file_get_access(fp, access);
544 return nfs_ok;
545}
546
547static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
548{
549
550 if (deny) {
551
552 if (deny & ~NFS4_SHARE_DENY_BOTH)
553 return nfserr_inval;
554
555 if ((deny & NFS4_SHARE_DENY_READ) &&
556 atomic_read(&fp->fi_access[O_RDONLY]))
557 return nfserr_share_denied;
558
559 if ((deny & NFS4_SHARE_DENY_WRITE) &&
560 atomic_read(&fp->fi_access[O_WRONLY]))
561 return nfserr_share_denied;
562 }
563 return nfs_ok;
564}
565
566static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
567{
568 might_lock(&fp->fi_lock);
569
570 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
571 struct file *f1 = NULL;
572 struct file *f2 = NULL;
573
574 swap(f1, fp->fi_fds[oflag]);
575 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
576 swap(f2, fp->fi_fds[O_RDWR]);
577 spin_unlock(&fp->fi_lock);
578 if (f1)
579 fput(f1);
580 if (f2)
581 fput(f2);
582 }
583}
584
585static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
586{
587 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
588
589 if (access & NFS4_SHARE_ACCESS_WRITE)
590 __nfs4_file_put_access(fp, O_WRONLY);
591 if (access & NFS4_SHARE_ACCESS_READ)
592 __nfs4_file_put_access(fp, O_RDONLY);
593}
594
595
596
597
598
599
600
601
602static struct nfs4_clnt_odstate *
603alloc_clnt_odstate(struct nfs4_client *clp)
604{
605 struct nfs4_clnt_odstate *co;
606
607 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
608 if (co) {
609 co->co_client = clp;
610 refcount_set(&co->co_odcount, 1);
611 }
612 return co;
613}
614
615static void
616hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
617{
618 struct nfs4_file *fp = co->co_file;
619
620 lockdep_assert_held(&fp->fi_lock);
621 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
622}
623
624static inline void
625get_clnt_odstate(struct nfs4_clnt_odstate *co)
626{
627 if (co)
628 refcount_inc(&co->co_odcount);
629}
630
631static void
632put_clnt_odstate(struct nfs4_clnt_odstate *co)
633{
634 struct nfs4_file *fp;
635
636 if (!co)
637 return;
638
639 fp = co->co_file;
640 if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
641 list_del(&co->co_perfile);
642 spin_unlock(&fp->fi_lock);
643
644 nfsd4_return_all_file_layouts(co->co_client, fp);
645 kmem_cache_free(odstate_slab, co);
646 }
647}
648
649static struct nfs4_clnt_odstate *
650find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
651{
652 struct nfs4_clnt_odstate *co;
653 struct nfs4_client *cl;
654
655 if (!new)
656 return NULL;
657
658 cl = new->co_client;
659
660 spin_lock(&fp->fi_lock);
661 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
662 if (co->co_client == cl) {
663 get_clnt_odstate(co);
664 goto out;
665 }
666 }
667 co = new;
668 co->co_file = fp;
669 hash_clnt_odstate_locked(new);
670out:
671 spin_unlock(&fp->fi_lock);
672 return co;
673}
674
675struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
676 void (*sc_free)(struct nfs4_stid *))
677{
678 struct nfs4_stid *stid;
679 int new_id;
680
681 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
682 if (!stid)
683 return NULL;
684
685 idr_preload(GFP_KERNEL);
686 spin_lock(&cl->cl_lock);
687 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
688 spin_unlock(&cl->cl_lock);
689 idr_preload_end();
690 if (new_id < 0)
691 goto out_free;
692
693 stid->sc_free = sc_free;
694 stid->sc_client = cl;
695 stid->sc_stateid.si_opaque.so_id = new_id;
696 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
697
698 refcount_set(&stid->sc_count, 1);
699 spin_lock_init(&stid->sc_lock);
700
701
702
703
704
705
706
707
708
709
710 return stid;
711out_free:
712 kmem_cache_free(slab, stid);
713 return NULL;
714}
715
716static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
717{
718 struct nfs4_stid *stid;
719
720 stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid);
721 if (!stid)
722 return NULL;
723
724 return openlockstateid(stid);
725}
726
727static void nfs4_free_deleg(struct nfs4_stid *stid)
728{
729 kmem_cache_free(deleg_slab, stid);
730 atomic_long_dec(&num_delegations);
731}
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751static DEFINE_SPINLOCK(blocked_delegations_lock);
752static struct bloom_pair {
753 int entries, old_entries;
754 time_t swap_time;
755 int new;
756 DECLARE_BITMAP(set[2], 256);
757} blocked_delegations;
758
759static int delegation_blocked(struct knfsd_fh *fh)
760{
761 u32 hash;
762 struct bloom_pair *bd = &blocked_delegations;
763
764 if (bd->entries == 0)
765 return 0;
766 if (seconds_since_boot() - bd->swap_time > 30) {
767 spin_lock(&blocked_delegations_lock);
768 if (seconds_since_boot() - bd->swap_time > 30) {
769 bd->entries -= bd->old_entries;
770 bd->old_entries = bd->entries;
771 memset(bd->set[bd->new], 0,
772 sizeof(bd->set[0]));
773 bd->new = 1-bd->new;
774 bd->swap_time = seconds_since_boot();
775 }
776 spin_unlock(&blocked_delegations_lock);
777 }
778 hash = jhash(&fh->fh_base, fh->fh_size, 0);
779 if (test_bit(hash&255, bd->set[0]) &&
780 test_bit((hash>>8)&255, bd->set[0]) &&
781 test_bit((hash>>16)&255, bd->set[0]))
782 return 1;
783
784 if (test_bit(hash&255, bd->set[1]) &&
785 test_bit((hash>>8)&255, bd->set[1]) &&
786 test_bit((hash>>16)&255, bd->set[1]))
787 return 1;
788
789 return 0;
790}
791
792static void block_delegations(struct knfsd_fh *fh)
793{
794 u32 hash;
795 struct bloom_pair *bd = &blocked_delegations;
796
797 hash = jhash(&fh->fh_base, fh->fh_size, 0);
798
799 spin_lock(&blocked_delegations_lock);
800 __set_bit(hash&255, bd->set[bd->new]);
801 __set_bit((hash>>8)&255, bd->set[bd->new]);
802 __set_bit((hash>>16)&255, bd->set[bd->new]);
803 if (bd->entries == 0)
804 bd->swap_time = seconds_since_boot();
805 bd->entries += 1;
806 spin_unlock(&blocked_delegations_lock);
807}
808
809static struct nfs4_delegation *
810alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
811 struct svc_fh *current_fh,
812 struct nfs4_clnt_odstate *odstate)
813{
814 struct nfs4_delegation *dp;
815 long n;
816
817 dprintk("NFSD alloc_init_deleg\n");
818 n = atomic_long_inc_return(&num_delegations);
819 if (n < 0 || n > max_delegations)
820 goto out_dec;
821 if (delegation_blocked(¤t_fh->fh_handle))
822 goto out_dec;
823 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg));
824 if (dp == NULL)
825 goto out_dec;
826
827
828
829
830
831
832 dp->dl_stid.sc_stateid.si_generation = 1;
833 INIT_LIST_HEAD(&dp->dl_perfile);
834 INIT_LIST_HEAD(&dp->dl_perclnt);
835 INIT_LIST_HEAD(&dp->dl_recall_lru);
836 dp->dl_clnt_odstate = odstate;
837 get_clnt_odstate(odstate);
838 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
839 dp->dl_retries = 1;
840 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
841 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
842 get_nfs4_file(fp);
843 dp->dl_stid.sc_file = fp;
844 return dp;
845out_dec:
846 atomic_long_dec(&num_delegations);
847 return NULL;
848}
849
850void
851nfs4_put_stid(struct nfs4_stid *s)
852{
853 struct nfs4_file *fp = s->sc_file;
854 struct nfs4_client *clp = s->sc_client;
855
856 might_lock(&clp->cl_lock);
857
858 if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
859 wake_up_all(&close_wq);
860 return;
861 }
862 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
863 spin_unlock(&clp->cl_lock);
864 s->sc_free(s);
865 if (fp)
866 put_nfs4_file(fp);
867}
868
869void
870nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
871{
872 stateid_t *src = &stid->sc_stateid;
873
874 spin_lock(&stid->sc_lock);
875 if (unlikely(++src->si_generation == 0))
876 src->si_generation = 1;
877 memcpy(dst, src, sizeof(*dst));
878 spin_unlock(&stid->sc_lock);
879}
880
881static void put_deleg_file(struct nfs4_file *fp)
882{
883 struct file *filp = NULL;
884
885 spin_lock(&fp->fi_lock);
886 if (--fp->fi_delegees == 0)
887 swap(filp, fp->fi_deleg_file);
888 spin_unlock(&fp->fi_lock);
889
890 if (filp)
891 fput(filp);
892}
893
894static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp)
895{
896 struct nfs4_file *fp = dp->dl_stid.sc_file;
897 struct file *filp = fp->fi_deleg_file;
898
899 WARN_ON_ONCE(!fp->fi_delegees);
900
901 vfs_setlease(filp, F_UNLCK, NULL, (void **)&dp);
902 put_deleg_file(fp);
903}
904
905static void destroy_unhashed_deleg(struct nfs4_delegation *dp)
906{
907 put_clnt_odstate(dp->dl_clnt_odstate);
908 nfs4_unlock_deleg_lease(dp);
909 nfs4_put_stid(&dp->dl_stid);
910}
911
912void nfs4_unhash_stid(struct nfs4_stid *s)
913{
914 s->sc_type = 0;
915}
916
917
918
919
920
921
922
923
924
925
926static bool
927nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp)
928{
929 struct nfs4_delegation *searchdp = NULL;
930 struct nfs4_client *searchclp = NULL;
931
932 lockdep_assert_held(&state_lock);
933 lockdep_assert_held(&fp->fi_lock);
934
935 list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {
936 searchclp = searchdp->dl_stid.sc_client;
937 if (clp == searchclp) {
938 return true;
939 }
940 }
941 return false;
942}
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957static int
958hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
959{
960 struct nfs4_client *clp = dp->dl_stid.sc_client;
961
962 lockdep_assert_held(&state_lock);
963 lockdep_assert_held(&fp->fi_lock);
964
965 if (nfs4_delegation_exists(clp, fp))
966 return -EAGAIN;
967 refcount_inc(&dp->dl_stid.sc_count);
968 dp->dl_stid.sc_type = NFS4_DELEG_STID;
969 list_add(&dp->dl_perfile, &fp->fi_delegations);
970 list_add(&dp->dl_perclnt, &clp->cl_delegations);
971 return 0;
972}
973
974static bool
975unhash_delegation_locked(struct nfs4_delegation *dp)
976{
977 struct nfs4_file *fp = dp->dl_stid.sc_file;
978
979 lockdep_assert_held(&state_lock);
980
981 if (list_empty(&dp->dl_perfile))
982 return false;
983
984 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
985
986 ++dp->dl_time;
987 spin_lock(&fp->fi_lock);
988 list_del_init(&dp->dl_perclnt);
989 list_del_init(&dp->dl_recall_lru);
990 list_del_init(&dp->dl_perfile);
991 spin_unlock(&fp->fi_lock);
992 return true;
993}
994
995static void destroy_delegation(struct nfs4_delegation *dp)
996{
997 bool unhashed;
998
999 spin_lock(&state_lock);
1000 unhashed = unhash_delegation_locked(dp);
1001 spin_unlock(&state_lock);
1002 if (unhashed)
1003 destroy_unhashed_deleg(dp);
1004}
1005
1006static void revoke_delegation(struct nfs4_delegation *dp)
1007{
1008 struct nfs4_client *clp = dp->dl_stid.sc_client;
1009
1010 WARN_ON(!list_empty(&dp->dl_recall_lru));
1011
1012 if (clp->cl_minorversion) {
1013 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
1014 refcount_inc(&dp->dl_stid.sc_count);
1015 spin_lock(&clp->cl_lock);
1016 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
1017 spin_unlock(&clp->cl_lock);
1018 }
1019 destroy_unhashed_deleg(dp);
1020}
1021
1022
1023
1024
1025
1026static unsigned int clientid_hashval(u32 id)
1027{
1028 return id & CLIENT_HASH_MASK;
1029}
1030
1031static unsigned int clientstr_hashval(const char *name)
1032{
1033 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
1034}
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054static unsigned int
1055bmap_to_share_mode(unsigned long bmap) {
1056 int i;
1057 unsigned int access = 0;
1058
1059 for (i = 1; i < 4; i++) {
1060 if (test_bit(i, &bmap))
1061 access |= i;
1062 }
1063 return access;
1064}
1065
1066
1067static inline void
1068set_access(u32 access, struct nfs4_ol_stateid *stp)
1069{
1070 unsigned char mask = 1 << access;
1071
1072 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1073 stp->st_access_bmap |= mask;
1074}
1075
1076
1077static inline void
1078clear_access(u32 access, struct nfs4_ol_stateid *stp)
1079{
1080 unsigned char mask = 1 << access;
1081
1082 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1083 stp->st_access_bmap &= ~mask;
1084}
1085
1086
1087static inline bool
1088test_access(u32 access, struct nfs4_ol_stateid *stp)
1089{
1090 unsigned char mask = 1 << access;
1091
1092 return (bool)(stp->st_access_bmap & mask);
1093}
1094
1095
1096static inline void
1097set_deny(u32 deny, struct nfs4_ol_stateid *stp)
1098{
1099 unsigned char mask = 1 << deny;
1100
1101 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1102 stp->st_deny_bmap |= mask;
1103}
1104
1105
1106static inline void
1107clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
1108{
1109 unsigned char mask = 1 << deny;
1110
1111 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1112 stp->st_deny_bmap &= ~mask;
1113}
1114
1115
1116static inline bool
1117test_deny(u32 deny, struct nfs4_ol_stateid *stp)
1118{
1119 unsigned char mask = 1 << deny;
1120
1121 return (bool)(stp->st_deny_bmap & mask);
1122}
1123
1124static int nfs4_access_to_omode(u32 access)
1125{
1126 switch (access & NFS4_SHARE_ACCESS_BOTH) {
1127 case NFS4_SHARE_ACCESS_READ:
1128 return O_RDONLY;
1129 case NFS4_SHARE_ACCESS_WRITE:
1130 return O_WRONLY;
1131 case NFS4_SHARE_ACCESS_BOTH:
1132 return O_RDWR;
1133 }
1134 WARN_ON_ONCE(1);
1135 return O_RDONLY;
1136}
1137
1138
1139
1140
1141
1142static void
1143recalculate_deny_mode(struct nfs4_file *fp)
1144{
1145 struct nfs4_ol_stateid *stp;
1146
1147 spin_lock(&fp->fi_lock);
1148 fp->fi_share_deny = 0;
1149 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
1150 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
1151 spin_unlock(&fp->fi_lock);
1152}
1153
1154static void
1155reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
1156{
1157 int i;
1158 bool change = false;
1159
1160 for (i = 1; i < 4; i++) {
1161 if ((i & deny) != i) {
1162 change = true;
1163 clear_deny(i, stp);
1164 }
1165 }
1166
1167
1168 if (change)
1169 recalculate_deny_mode(stp->st_stid.sc_file);
1170}
1171
1172
1173static void
1174release_all_access(struct nfs4_ol_stateid *stp)
1175{
1176 int i;
1177 struct nfs4_file *fp = stp->st_stid.sc_file;
1178
1179 if (fp && stp->st_deny_bmap != 0)
1180 recalculate_deny_mode(fp);
1181
1182 for (i = 1; i < 4; i++) {
1183 if (test_access(i, stp))
1184 nfs4_file_put_access(stp->st_stid.sc_file, i);
1185 clear_access(i, stp);
1186 }
1187}
1188
1189static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
1190{
1191 kfree(sop->so_owner.data);
1192 sop->so_ops->so_free(sop);
1193}
1194
1195static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
1196{
1197 struct nfs4_client *clp = sop->so_client;
1198
1199 might_lock(&clp->cl_lock);
1200
1201 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
1202 return;
1203 sop->so_ops->so_unhash(sop);
1204 spin_unlock(&clp->cl_lock);
1205 nfs4_free_stateowner(sop);
1206}
1207
1208static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
1209{
1210 struct nfs4_file *fp = stp->st_stid.sc_file;
1211
1212 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1213
1214 if (list_empty(&stp->st_perfile))
1215 return false;
1216
1217 spin_lock(&fp->fi_lock);
1218 list_del_init(&stp->st_perfile);
1219 spin_unlock(&fp->fi_lock);
1220 list_del(&stp->st_perstateowner);
1221 return true;
1222}
1223
1224static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
1225{
1226 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1227
1228 put_clnt_odstate(stp->st_clnt_odstate);
1229 release_all_access(stp);
1230 if (stp->st_stateowner)
1231 nfs4_put_stateowner(stp->st_stateowner);
1232 kmem_cache_free(stateid_slab, stid);
1233}
1234
1235static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
1236{
1237 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1238 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
1239 struct file *file;
1240
1241 file = find_any_file(stp->st_stid.sc_file);
1242 if (file)
1243 filp_close(file, (fl_owner_t)lo);
1244 nfs4_free_ol_stateid(stid);
1245}
1246
1247
1248
1249
1250
1251
1252static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1253 struct list_head *reaplist)
1254{
1255 struct nfs4_stid *s = &stp->st_stid;
1256 struct nfs4_client *clp = s->sc_client;
1257
1258 lockdep_assert_held(&clp->cl_lock);
1259
1260 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1261
1262 if (!refcount_dec_and_test(&s->sc_count)) {
1263 wake_up_all(&close_wq);
1264 return;
1265 }
1266
1267 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1268 list_add(&stp->st_locks, reaplist);
1269}
1270
1271static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
1272{
1273 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1274
1275 list_del_init(&stp->st_locks);
1276 nfs4_unhash_stid(&stp->st_stid);
1277 return unhash_ol_stateid(stp);
1278}
1279
1280static void release_lock_stateid(struct nfs4_ol_stateid *stp)
1281{
1282 struct nfs4_client *clp = stp->st_stid.sc_client;
1283 bool unhashed;
1284
1285 spin_lock(&clp->cl_lock);
1286 unhashed = unhash_lock_stateid(stp);
1287 spin_unlock(&clp->cl_lock);
1288 if (unhashed)
1289 nfs4_put_stid(&stp->st_stid);
1290}
1291
1292static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
1293{
1294 struct nfs4_client *clp = lo->lo_owner.so_client;
1295
1296 lockdep_assert_held(&clp->cl_lock);
1297
1298 list_del_init(&lo->lo_owner.so_strhash);
1299}
1300
1301
1302
1303
1304
1305static void
1306free_ol_stateid_reaplist(struct list_head *reaplist)
1307{
1308 struct nfs4_ol_stateid *stp;
1309 struct nfs4_file *fp;
1310
1311 might_sleep();
1312
1313 while (!list_empty(reaplist)) {
1314 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1315 st_locks);
1316 list_del(&stp->st_locks);
1317 fp = stp->st_stid.sc_file;
1318 stp->st_stid.sc_free(&stp->st_stid);
1319 if (fp)
1320 put_nfs4_file(fp);
1321 }
1322}
1323
1324static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1325 struct list_head *reaplist)
1326{
1327 struct nfs4_ol_stateid *stp;
1328
1329 lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);
1330
1331 while (!list_empty(&open_stp->st_locks)) {
1332 stp = list_entry(open_stp->st_locks.next,
1333 struct nfs4_ol_stateid, st_locks);
1334 WARN_ON(!unhash_lock_stateid(stp));
1335 put_ol_stateid_locked(stp, reaplist);
1336 }
1337}
1338
1339static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
1340 struct list_head *reaplist)
1341{
1342 bool unhashed;
1343
1344 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1345
1346 unhashed = unhash_ol_stateid(stp);
1347 release_open_stateid_locks(stp, reaplist);
1348 return unhashed;
1349}
1350
1351static void release_open_stateid(struct nfs4_ol_stateid *stp)
1352{
1353 LIST_HEAD(reaplist);
1354
1355 spin_lock(&stp->st_stid.sc_client->cl_lock);
1356 if (unhash_open_stateid(stp, &reaplist))
1357 put_ol_stateid_locked(stp, &reaplist);
1358 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1359 free_ol_stateid_reaplist(&reaplist);
1360}
1361
1362static void unhash_openowner_locked(struct nfs4_openowner *oo)
1363{
1364 struct nfs4_client *clp = oo->oo_owner.so_client;
1365
1366 lockdep_assert_held(&clp->cl_lock);
1367
1368 list_del_init(&oo->oo_owner.so_strhash);
1369 list_del_init(&oo->oo_perclient);
1370}
1371
1372static void release_last_closed_stateid(struct nfs4_openowner *oo)
1373{
1374 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1375 nfsd_net_id);
1376 struct nfs4_ol_stateid *s;
1377
1378 spin_lock(&nn->client_lock);
1379 s = oo->oo_last_closed_stid;
1380 if (s) {
1381 list_del_init(&oo->oo_close_lru);
1382 oo->oo_last_closed_stid = NULL;
1383 }
1384 spin_unlock(&nn->client_lock);
1385 if (s)
1386 nfs4_put_stid(&s->st_stid);
1387}
1388
1389static void release_openowner(struct nfs4_openowner *oo)
1390{
1391 struct nfs4_ol_stateid *stp;
1392 struct nfs4_client *clp = oo->oo_owner.so_client;
1393 struct list_head reaplist;
1394
1395 INIT_LIST_HEAD(&reaplist);
1396
1397 spin_lock(&clp->cl_lock);
1398 unhash_openowner_locked(oo);
1399 while (!list_empty(&oo->oo_owner.so_stateids)) {
1400 stp = list_first_entry(&oo->oo_owner.so_stateids,
1401 struct nfs4_ol_stateid, st_perstateowner);
1402 if (unhash_open_stateid(stp, &reaplist))
1403 put_ol_stateid_locked(stp, &reaplist);
1404 }
1405 spin_unlock(&clp->cl_lock);
1406 free_ol_stateid_reaplist(&reaplist);
1407 release_last_closed_stateid(oo);
1408 nfs4_put_stateowner(&oo->oo_owner);
1409}
1410
1411static inline int
1412hash_sessionid(struct nfs4_sessionid *sessionid)
1413{
1414 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1415
1416 return sid->sequence % SESSION_HASH_SIZE;
1417}
1418
1419#ifdef CONFIG_SUNRPC_DEBUG
1420static inline void
1421dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1422{
1423 u32 *ptr = (u32 *)(&sessionid->data[0]);
1424 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1425}
1426#else
1427static inline void
1428dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1429{
1430}
1431#endif
1432
1433
1434
1435
1436
1437void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1438{
1439 struct nfs4_stateowner *so = cstate->replay_owner;
1440
1441 if (nfserr == nfserr_replay_me)
1442 return;
1443
1444 if (!seqid_mutating_err(ntohl(nfserr))) {
1445 nfsd4_cstate_clear_replay(cstate);
1446 return;
1447 }
1448 if (!so)
1449 return;
1450 if (so->so_is_open_owner)
1451 release_last_closed_stateid(openowner(so));
1452 so->so_seqid++;
1453 return;
1454}
1455
1456static void
1457gen_sessionid(struct nfsd4_session *ses)
1458{
1459 struct nfs4_client *clp = ses->se_client;
1460 struct nfsd4_sessionid *sid;
1461
1462 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1463 sid->clientid = clp->cl_clientid;
1464 sid->sequence = current_sessionid++;
1465 sid->reserved = 0;
1466}
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1481
1482static void
1483free_session_slots(struct nfsd4_session *ses)
1484{
1485 int i;
1486
1487 for (i = 0; i < ses->se_fchannel.maxreqs; i++) {
1488 free_svc_cred(&ses->se_slots[i]->sl_cred);
1489 kfree(ses->se_slots[i]);
1490 }
1491}
1492
1493
1494
1495
1496
1497static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1498{
1499 u32 size;
1500
1501 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1502 size = 0;
1503 else
1504 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1505 return size + sizeof(struct nfsd4_slot);
1506}
1507
1508
1509
1510
1511
1512
1513static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
1514{
1515 u32 slotsize = slot_bytes(ca);
1516 u32 num = ca->maxreqs;
1517 int avail;
1518
1519 spin_lock(&nfsd_drc_lock);
1520 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1521 nfsd_drc_max_mem - nfsd_drc_mem_used);
1522
1523
1524
1525
1526 avail = clamp_t(int, avail, slotsize, avail/3);
1527 num = min_t(int, num, avail / slotsize);
1528 nfsd_drc_mem_used += num * slotsize;
1529 spin_unlock(&nfsd_drc_lock);
1530
1531 return num;
1532}
1533
1534static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1535{
1536 int slotsize = slot_bytes(ca);
1537
1538 spin_lock(&nfsd_drc_lock);
1539 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1540 spin_unlock(&nfsd_drc_lock);
1541}
1542
1543static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1544 struct nfsd4_channel_attrs *battrs)
1545{
1546 int numslots = fattrs->maxreqs;
1547 int slotsize = slot_bytes(fattrs);
1548 struct nfsd4_session *new;
1549 int mem, i;
1550
1551 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1552 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1553 mem = numslots * sizeof(struct nfsd4_slot *);
1554
1555 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1556 if (!new)
1557 return NULL;
1558
1559 for (i = 0; i < numslots; i++) {
1560 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1561 if (!new->se_slots[i])
1562 goto out_free;
1563 }
1564
1565 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1566 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1567
1568 return new;
1569out_free:
1570 while (i--)
1571 kfree(new->se_slots[i]);
1572 kfree(new);
1573 return NULL;
1574}
1575
1576static void free_conn(struct nfsd4_conn *c)
1577{
1578 svc_xprt_put(c->cn_xprt);
1579 kfree(c);
1580}
1581
1582static void nfsd4_conn_lost(struct svc_xpt_user *u)
1583{
1584 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1585 struct nfs4_client *clp = c->cn_session->se_client;
1586
1587 spin_lock(&clp->cl_lock);
1588 if (!list_empty(&c->cn_persession)) {
1589 list_del(&c->cn_persession);
1590 free_conn(c);
1591 }
1592 nfsd4_probe_callback(clp);
1593 spin_unlock(&clp->cl_lock);
1594}
1595
1596static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1597{
1598 struct nfsd4_conn *conn;
1599
1600 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1601 if (!conn)
1602 return NULL;
1603 svc_xprt_get(rqstp->rq_xprt);
1604 conn->cn_xprt = rqstp->rq_xprt;
1605 conn->cn_flags = flags;
1606 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1607 return conn;
1608}
1609
1610static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1611{
1612 conn->cn_session = ses;
1613 list_add(&conn->cn_persession, &ses->se_conns);
1614}
1615
1616static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1617{
1618 struct nfs4_client *clp = ses->se_client;
1619
1620 spin_lock(&clp->cl_lock);
1621 __nfsd4_hash_conn(conn, ses);
1622 spin_unlock(&clp->cl_lock);
1623}
1624
1625static int nfsd4_register_conn(struct nfsd4_conn *conn)
1626{
1627 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1628 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1629}
1630
1631static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1632{
1633 int ret;
1634
1635 nfsd4_hash_conn(conn, ses);
1636 ret = nfsd4_register_conn(conn);
1637 if (ret)
1638
1639 nfsd4_conn_lost(&conn->cn_xpt_user);
1640
1641 nfsd4_probe_callback_sync(ses->se_client);
1642}
1643
1644static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1645{
1646 u32 dir = NFS4_CDFC4_FORE;
1647
1648 if (cses->flags & SESSION4_BACK_CHAN)
1649 dir |= NFS4_CDFC4_BACK;
1650 return alloc_conn(rqstp, dir);
1651}
1652
1653
1654static void nfsd4_del_conns(struct nfsd4_session *s)
1655{
1656 struct nfs4_client *clp = s->se_client;
1657 struct nfsd4_conn *c;
1658
1659 spin_lock(&clp->cl_lock);
1660 while (!list_empty(&s->se_conns)) {
1661 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1662 list_del_init(&c->cn_persession);
1663 spin_unlock(&clp->cl_lock);
1664
1665 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1666 free_conn(c);
1667
1668 spin_lock(&clp->cl_lock);
1669 }
1670 spin_unlock(&clp->cl_lock);
1671}
1672
1673static void __free_session(struct nfsd4_session *ses)
1674{
1675 free_session_slots(ses);
1676 kfree(ses);
1677}
1678
1679static void free_session(struct nfsd4_session *ses)
1680{
1681 nfsd4_del_conns(ses);
1682 nfsd4_put_drc_mem(&ses->se_fchannel);
1683 __free_session(ses);
1684}
1685
1686static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1687{
1688 int idx;
1689 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1690
1691 new->se_client = clp;
1692 gen_sessionid(new);
1693
1694 INIT_LIST_HEAD(&new->se_conns);
1695
1696 new->se_cb_seq_nr = 1;
1697 new->se_flags = cses->flags;
1698 new->se_cb_prog = cses->callback_prog;
1699 new->se_cb_sec = cses->cb_sec;
1700 atomic_set(&new->se_ref, 0);
1701 idx = hash_sessionid(&new->se_sessionid);
1702 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1703 spin_lock(&clp->cl_lock);
1704 list_add(&new->se_perclnt, &clp->cl_sessions);
1705 spin_unlock(&clp->cl_lock);
1706
1707 {
1708 struct sockaddr *sa = svc_addr(rqstp);
1709
1710
1711
1712
1713
1714
1715
1716 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1717 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1718 }
1719}
1720
1721
1722static struct nfsd4_session *
1723__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1724{
1725 struct nfsd4_session *elem;
1726 int idx;
1727 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1728
1729 lockdep_assert_held(&nn->client_lock);
1730
1731 dump_sessionid(__func__, sessionid);
1732 idx = hash_sessionid(sessionid);
1733
1734 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1735 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1736 NFS4_MAX_SESSIONID_LEN)) {
1737 return elem;
1738 }
1739 }
1740
1741 dprintk("%s: session not found\n", __func__);
1742 return NULL;
1743}
1744
1745static struct nfsd4_session *
1746find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1747 __be32 *ret)
1748{
1749 struct nfsd4_session *session;
1750 __be32 status = nfserr_badsession;
1751
1752 session = __find_in_sessionid_hashtbl(sessionid, net);
1753 if (!session)
1754 goto out;
1755 status = nfsd4_get_session_locked(session);
1756 if (status)
1757 session = NULL;
1758out:
1759 *ret = status;
1760 return session;
1761}
1762
1763
1764static void
1765unhash_session(struct nfsd4_session *ses)
1766{
1767 struct nfs4_client *clp = ses->se_client;
1768 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1769
1770 lockdep_assert_held(&nn->client_lock);
1771
1772 list_del(&ses->se_hash);
1773 spin_lock(&ses->se_client->cl_lock);
1774 list_del(&ses->se_perclnt);
1775 spin_unlock(&ses->se_client->cl_lock);
1776}
1777
1778
1779static int
1780STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1781{
1782
1783
1784
1785
1786
1787 if (clid->cl_boot == (u32)nn->boot_time)
1788 return 0;
1789 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1790 clid->cl_boot, clid->cl_id, nn->boot_time);
1791 return 1;
1792}
1793
1794
1795
1796
1797
1798
1799static struct nfs4_client *alloc_client(struct xdr_netobj name)
1800{
1801 struct nfs4_client *clp;
1802 int i;
1803
1804 clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
1805 if (clp == NULL)
1806 return NULL;
1807 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
1808 if (clp->cl_name.data == NULL)
1809 goto err_no_name;
1810 clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
1811 OWNER_HASH_SIZE, GFP_KERNEL);
1812 if (!clp->cl_ownerstr_hashtbl)
1813 goto err_no_hashtbl;
1814 for (i = 0; i < OWNER_HASH_SIZE; i++)
1815 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
1816 clp->cl_name.len = name.len;
1817 INIT_LIST_HEAD(&clp->cl_sessions);
1818 idr_init(&clp->cl_stateids);
1819 atomic_set(&clp->cl_refcount, 0);
1820 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1821 INIT_LIST_HEAD(&clp->cl_idhash);
1822 INIT_LIST_HEAD(&clp->cl_openowners);
1823 INIT_LIST_HEAD(&clp->cl_delegations);
1824 INIT_LIST_HEAD(&clp->cl_lru);
1825 INIT_LIST_HEAD(&clp->cl_revoked);
1826#ifdef CONFIG_NFSD_PNFS
1827 INIT_LIST_HEAD(&clp->cl_lo_states);
1828#endif
1829 spin_lock_init(&clp->cl_lock);
1830 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1831 return clp;
1832err_no_hashtbl:
1833 kfree(clp->cl_name.data);
1834err_no_name:
1835 kmem_cache_free(client_slab, clp);
1836 return NULL;
1837}
1838
1839static void
1840free_client(struct nfs4_client *clp)
1841{
1842 while (!list_empty(&clp->cl_sessions)) {
1843 struct nfsd4_session *ses;
1844 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1845 se_perclnt);
1846 list_del(&ses->se_perclnt);
1847 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1848 free_session(ses);
1849 }
1850 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1851 free_svc_cred(&clp->cl_cred);
1852 kfree(clp->cl_ownerstr_hashtbl);
1853 kfree(clp->cl_name.data);
1854 idr_destroy(&clp->cl_stateids);
1855 kmem_cache_free(client_slab, clp);
1856}
1857
1858
1859static void
1860unhash_client_locked(struct nfs4_client *clp)
1861{
1862 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1863 struct nfsd4_session *ses;
1864
1865 lockdep_assert_held(&nn->client_lock);
1866
1867
1868 clp->cl_time = 0;
1869
1870 if (!list_empty(&clp->cl_idhash)) {
1871 list_del_init(&clp->cl_idhash);
1872 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1873 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1874 else
1875 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1876 }
1877 list_del_init(&clp->cl_lru);
1878 spin_lock(&clp->cl_lock);
1879 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1880 list_del_init(&ses->se_hash);
1881 spin_unlock(&clp->cl_lock);
1882}
1883
1884static void
1885unhash_client(struct nfs4_client *clp)
1886{
1887 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1888
1889 spin_lock(&nn->client_lock);
1890 unhash_client_locked(clp);
1891 spin_unlock(&nn->client_lock);
1892}
1893
1894static __be32 mark_client_expired_locked(struct nfs4_client *clp)
1895{
1896 if (atomic_read(&clp->cl_refcount))
1897 return nfserr_jukebox;
1898 unhash_client_locked(clp);
1899 return nfs_ok;
1900}
1901
1902static void
1903__destroy_client(struct nfs4_client *clp)
1904{
1905 int i;
1906 struct nfs4_openowner *oo;
1907 struct nfs4_delegation *dp;
1908 struct list_head reaplist;
1909
1910 INIT_LIST_HEAD(&reaplist);
1911 spin_lock(&state_lock);
1912 while (!list_empty(&clp->cl_delegations)) {
1913 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1914 WARN_ON(!unhash_delegation_locked(dp));
1915 list_add(&dp->dl_recall_lru, &reaplist);
1916 }
1917 spin_unlock(&state_lock);
1918 while (!list_empty(&reaplist)) {
1919 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1920 list_del_init(&dp->dl_recall_lru);
1921 destroy_unhashed_deleg(dp);
1922 }
1923 while (!list_empty(&clp->cl_revoked)) {
1924 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
1925 list_del_init(&dp->dl_recall_lru);
1926 nfs4_put_stid(&dp->dl_stid);
1927 }
1928 while (!list_empty(&clp->cl_openowners)) {
1929 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1930 nfs4_get_stateowner(&oo->oo_owner);
1931 release_openowner(oo);
1932 }
1933 for (i = 0; i < OWNER_HASH_SIZE; i++) {
1934 struct nfs4_stateowner *so, *tmp;
1935
1936 list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],
1937 so_strhash) {
1938
1939 WARN_ON_ONCE(so->so_is_open_owner);
1940 remove_blocked_locks(lockowner(so));
1941 }
1942 }
1943 nfsd4_return_all_client_layouts(clp);
1944 nfsd4_shutdown_callback(clp);
1945 if (clp->cl_cb_conn.cb_xprt)
1946 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
1947 free_client(clp);
1948}
1949
1950static void
1951destroy_client(struct nfs4_client *clp)
1952{
1953 unhash_client(clp);
1954 __destroy_client(clp);
1955}
1956
1957static void expire_client(struct nfs4_client *clp)
1958{
1959 unhash_client(clp);
1960 nfsd4_client_record_remove(clp);
1961 __destroy_client(clp);
1962}
1963
1964static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1965{
1966 memcpy(target->cl_verifier.data, source->data,
1967 sizeof(target->cl_verifier.data));
1968}
1969
1970static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1971{
1972 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1973 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1974}
1975
1976static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1977{
1978 target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);
1979 target->cr_raw_principal = kstrdup(source->cr_raw_principal,
1980 GFP_KERNEL);
1981 if ((source->cr_principal && ! target->cr_principal) ||
1982 (source->cr_raw_principal && ! target->cr_raw_principal))
1983 return -ENOMEM;
1984
1985 target->cr_flavor = source->cr_flavor;
1986 target->cr_uid = source->cr_uid;
1987 target->cr_gid = source->cr_gid;
1988 target->cr_group_info = source->cr_group_info;
1989 get_group_info(target->cr_group_info);
1990 target->cr_gss_mech = source->cr_gss_mech;
1991 if (source->cr_gss_mech)
1992 gss_mech_get(source->cr_gss_mech);
1993 return 0;
1994}
1995
1996static int
1997compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1998{
1999 if (o1->len < o2->len)
2000 return -1;
2001 if (o1->len > o2->len)
2002 return 1;
2003 return memcmp(o1->data, o2->data, o1->len);
2004}
2005
2006static int same_name(const char *n1, const char *n2)
2007{
2008 return 0 == memcmp(n1, n2, HEXDIR_LEN);
2009}
2010
2011static int
2012same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
2013{
2014 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
2015}
2016
2017static int
2018same_clid(clientid_t *cl1, clientid_t *cl2)
2019{
2020 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
2021}
2022
2023static bool groups_equal(struct group_info *g1, struct group_info *g2)
2024{
2025 int i;
2026
2027 if (g1->ngroups != g2->ngroups)
2028 return false;
2029 for (i=0; i<g1->ngroups; i++)
2030 if (!gid_eq(g1->gid[i], g2->gid[i]))
2031 return false;
2032 return true;
2033}
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044static bool is_gss_cred(struct svc_cred *cr)
2045{
2046
2047 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
2048}
2049
2050
2051static bool
2052same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
2053{
2054 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
2055 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
2056 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
2057 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
2058 return false;
2059 if (cr1->cr_principal == cr2->cr_principal)
2060 return true;
2061 if (!cr1->cr_principal || !cr2->cr_principal)
2062 return false;
2063 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
2064}
2065
2066static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
2067{
2068 struct svc_cred *cr = &rqstp->rq_cred;
2069 u32 service;
2070
2071 if (!cr->cr_gss_mech)
2072 return false;
2073 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
2074 return service == RPC_GSS_SVC_INTEGRITY ||
2075 service == RPC_GSS_SVC_PRIVACY;
2076}
2077
2078bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
2079{
2080 struct svc_cred *cr = &rqstp->rq_cred;
2081
2082 if (!cl->cl_mach_cred)
2083 return true;
2084 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
2085 return false;
2086 if (!svc_rqst_integrity_protected(rqstp))
2087 return false;
2088 if (cl->cl_cred.cr_raw_principal)
2089 return 0 == strcmp(cl->cl_cred.cr_raw_principal,
2090 cr->cr_raw_principal);
2091 if (!cr->cr_principal)
2092 return false;
2093 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
2094}
2095
2096static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
2097{
2098 __be32 verf[2];
2099
2100
2101
2102
2103
2104 verf[0] = (__force __be32)get_seconds();
2105 verf[1] = (__force __be32)nn->clverifier_counter++;
2106 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
2107}
2108
2109static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
2110{
2111 clp->cl_clientid.cl_boot = nn->boot_time;
2112 clp->cl_clientid.cl_id = nn->clientid_counter++;
2113 gen_confirm(clp, nn);
2114}
2115
2116static struct nfs4_stid *
2117find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
2118{
2119 struct nfs4_stid *ret;
2120
2121 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
2122 if (!ret || !ret->sc_type)
2123 return NULL;
2124 return ret;
2125}
2126
2127static struct nfs4_stid *
2128find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
2129{
2130 struct nfs4_stid *s;
2131
2132 spin_lock(&cl->cl_lock);
2133 s = find_stateid_locked(cl, t);
2134 if (s != NULL) {
2135 if (typemask & s->sc_type)
2136 refcount_inc(&s->sc_count);
2137 else
2138 s = NULL;
2139 }
2140 spin_unlock(&cl->cl_lock);
2141 return s;
2142}
2143
2144static struct nfs4_client *create_client(struct xdr_netobj name,
2145 struct svc_rqst *rqstp, nfs4_verifier *verf)
2146{
2147 struct nfs4_client *clp;
2148 struct sockaddr *sa = svc_addr(rqstp);
2149 int ret;
2150 struct net *net = SVC_NET(rqstp);
2151
2152 clp = alloc_client(name);
2153 if (clp == NULL)
2154 return NULL;
2155
2156 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
2157 if (ret) {
2158 free_client(clp);
2159 return NULL;
2160 }
2161 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
2162 clp->cl_time = get_seconds();
2163 clear_bit(0, &clp->cl_cb_slot_busy);
2164 copy_verf(clp, verf);
2165 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
2166 clp->cl_cb_session = NULL;
2167 clp->net = net;
2168 return clp;
2169}
2170
2171static void
2172add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
2173{
2174 struct rb_node **new = &(root->rb_node), *parent = NULL;
2175 struct nfs4_client *clp;
2176
2177 while (*new) {
2178 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
2179 parent = *new;
2180
2181 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
2182 new = &((*new)->rb_left);
2183 else
2184 new = &((*new)->rb_right);
2185 }
2186
2187 rb_link_node(&new_clp->cl_namenode, parent, new);
2188 rb_insert_color(&new_clp->cl_namenode, root);
2189}
2190
2191static struct nfs4_client *
2192find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
2193{
2194 int cmp;
2195 struct rb_node *node = root->rb_node;
2196 struct nfs4_client *clp;
2197
2198 while (node) {
2199 clp = rb_entry(node, struct nfs4_client, cl_namenode);
2200 cmp = compare_blob(&clp->cl_name, name);
2201 if (cmp > 0)
2202 node = node->rb_left;
2203 else if (cmp < 0)
2204 node = node->rb_right;
2205 else
2206 return clp;
2207 }
2208 return NULL;
2209}
2210
2211static void
2212add_to_unconfirmed(struct nfs4_client *clp)
2213{
2214 unsigned int idhashval;
2215 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2216
2217 lockdep_assert_held(&nn->client_lock);
2218
2219 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2220 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
2221 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2222 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
2223 renew_client_locked(clp);
2224}
2225
2226static void
2227move_to_confirmed(struct nfs4_client *clp)
2228{
2229 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2230 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2231
2232 lockdep_assert_held(&nn->client_lock);
2233
2234 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
2235 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
2236 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
2237 add_clp_to_name_tree(clp, &nn->conf_name_tree);
2238 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2239 renew_client_locked(clp);
2240}
2241
2242static struct nfs4_client *
2243find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
2244{
2245 struct nfs4_client *clp;
2246 unsigned int idhashval = clientid_hashval(clid->cl_id);
2247
2248 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
2249 if (same_clid(&clp->cl_clientid, clid)) {
2250 if ((bool)clp->cl_minorversion != sessions)
2251 return NULL;
2252 renew_client_locked(clp);
2253 return clp;
2254 }
2255 }
2256 return NULL;
2257}
2258
2259static struct nfs4_client *
2260find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2261{
2262 struct list_head *tbl = nn->conf_id_hashtbl;
2263
2264 lockdep_assert_held(&nn->client_lock);
2265 return find_client_in_id_table(tbl, clid, sessions);
2266}
2267
2268static struct nfs4_client *
2269find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2270{
2271 struct list_head *tbl = nn->unconf_id_hashtbl;
2272
2273 lockdep_assert_held(&nn->client_lock);
2274 return find_client_in_id_table(tbl, clid, sessions);
2275}
2276
2277static bool clp_used_exchangeid(struct nfs4_client *clp)
2278{
2279 return clp->cl_exchange_flags != 0;
2280}
2281
2282static struct nfs4_client *
2283find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2284{
2285 lockdep_assert_held(&nn->client_lock);
2286 return find_clp_in_name_tree(name, &nn->conf_name_tree);
2287}
2288
2289static struct nfs4_client *
2290find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2291{
2292 lockdep_assert_held(&nn->client_lock);
2293 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
2294}
2295
2296static void
2297gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
2298{
2299 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
2300 struct sockaddr *sa = svc_addr(rqstp);
2301 u32 scopeid = rpc_get_scope_id(sa);
2302 unsigned short expected_family;
2303
2304
2305 if (se->se_callback_netid_len == 3 &&
2306 !memcmp(se->se_callback_netid_val, "tcp", 3))
2307 expected_family = AF_INET;
2308 else if (se->se_callback_netid_len == 4 &&
2309 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2310 expected_family = AF_INET6;
2311 else
2312 goto out_err;
2313
2314 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
2315 se->se_callback_addr_len,
2316 (struct sockaddr *)&conn->cb_addr,
2317 sizeof(conn->cb_addr));
2318
2319 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
2320 goto out_err;
2321
2322 if (conn->cb_addr.ss_family == AF_INET6)
2323 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
2324
2325 conn->cb_prog = se->se_callback_prog;
2326 conn->cb_ident = se->se_callback_ident;
2327 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
2328 return;
2329out_err:
2330 conn->cb_addr.ss_family = AF_UNSPEC;
2331 conn->cb_addrlen = 0;
2332 dprintk("NFSD: this client (clientid %08x/%08x) "
2333 "will not receive delegations\n",
2334 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
2335
2336 return;
2337}
2338
2339
2340
2341
2342static void
2343nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2344{
2345 struct xdr_buf *buf = resp->xdr.buf;
2346 struct nfsd4_slot *slot = resp->cstate.slot;
2347 unsigned int base;
2348
2349 dprintk("--> %s slot %p\n", __func__, slot);
2350
2351 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
2352 slot->sl_opcnt = resp->opcnt;
2353 slot->sl_status = resp->cstate.status;
2354 free_svc_cred(&slot->sl_cred);
2355 copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);
2356
2357 if (!nfsd4_cache_this(resp)) {
2358 slot->sl_flags &= ~NFSD4_SLOT_CACHED;
2359 return;
2360 }
2361 slot->sl_flags |= NFSD4_SLOT_CACHED;
2362
2363 base = resp->cstate.data_offset;
2364 slot->sl_datalen = buf->len - base;
2365 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
2366 WARN(1, "%s: sessions DRC could not cache compound\n",
2367 __func__);
2368 return;
2369}
2370
2371
2372
2373
2374
2375
2376
2377
2378static __be32
2379nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2380 struct nfsd4_compoundres *resp)
2381{
2382 struct nfsd4_op *op;
2383 struct nfsd4_slot *slot = resp->cstate.slot;
2384
2385
2386 op = &args->ops[resp->opcnt - 1];
2387 nfsd4_encode_operation(resp, op);
2388
2389 if (slot->sl_flags & NFSD4_SLOT_CACHED)
2390 return op->status;
2391 if (args->opcnt == 1) {
2392
2393
2394
2395
2396
2397 op->status = nfserr_seq_false_retry;
2398 } else {
2399 op = &args->ops[resp->opcnt++];
2400 op->status = nfserr_retry_uncached_rep;
2401 nfsd4_encode_operation(resp, op);
2402 }
2403 return op->status;
2404}
2405
2406
2407
2408
2409
2410static __be32
2411nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
2412 struct nfsd4_sequence *seq)
2413{
2414 struct nfsd4_slot *slot = resp->cstate.slot;
2415 struct xdr_stream *xdr = &resp->xdr;
2416 __be32 *p;
2417 __be32 status;
2418
2419 dprintk("--> %s slot %p\n", __func__, slot);
2420
2421 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
2422 if (status)
2423 return status;
2424
2425 p = xdr_reserve_space(xdr, slot->sl_datalen);
2426 if (!p) {
2427 WARN_ON_ONCE(1);
2428 return nfserr_serverfault;
2429 }
2430 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
2431 xdr_commit_encode(xdr);
2432
2433 resp->opcnt = slot->sl_opcnt;
2434 return slot->sl_status;
2435}
2436
2437
2438
2439
2440static void
2441nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
2442{
2443#ifdef CONFIG_NFSD_PNFS
2444 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
2445#else
2446 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
2447#endif
2448
2449
2450 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
2451
2452
2453 clid->flags = new->cl_exchange_flags;
2454}
2455
2456static bool client_has_openowners(struct nfs4_client *clp)
2457{
2458 struct nfs4_openowner *oo;
2459
2460 list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
2461 if (!list_empty(&oo->oo_owner.so_stateids))
2462 return true;
2463 }
2464 return false;
2465}
2466
2467static bool client_has_state(struct nfs4_client *clp)
2468{
2469 return client_has_openowners(clp)
2470#ifdef CONFIG_NFSD_PNFS
2471 || !list_empty(&clp->cl_lo_states)
2472#endif
2473 || !list_empty(&clp->cl_delegations)
2474 || !list_empty(&clp->cl_sessions);
2475}
2476
2477__be32
2478nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2479 union nfsd4_op_u *u)
2480{
2481 struct nfsd4_exchange_id *exid = &u->exchange_id;
2482 struct nfs4_client *conf, *new;
2483 struct nfs4_client *unconf = NULL;
2484 __be32 status;
2485 char addr_str[INET6_ADDRSTRLEN];
2486 nfs4_verifier verf = exid->verifier;
2487 struct sockaddr *sa = svc_addr(rqstp);
2488 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
2489 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2490
2491 rpc_ntop(sa, addr_str, sizeof(addr_str));
2492 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2493 "ip_addr=%s flags %x, spa_how %d\n",
2494 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
2495 addr_str, exid->flags, exid->spa_how);
2496
2497 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
2498 return nfserr_inval;
2499
2500 new = create_client(exid->clname, rqstp, &verf);
2501 if (new == NULL)
2502 return nfserr_jukebox;
2503
2504 switch (exid->spa_how) {
2505 case SP4_MACH_CRED:
2506 exid->spo_must_enforce[0] = 0;
2507 exid->spo_must_enforce[1] = (
2508 1 << (OP_BIND_CONN_TO_SESSION - 32) |
2509 1 << (OP_EXCHANGE_ID - 32) |
2510 1 << (OP_CREATE_SESSION - 32) |
2511 1 << (OP_DESTROY_SESSION - 32) |
2512 1 << (OP_DESTROY_CLIENTID - 32));
2513
2514 exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |
2515 1 << (OP_OPEN_DOWNGRADE) |
2516 1 << (OP_LOCKU) |
2517 1 << (OP_DELEGRETURN));
2518
2519 exid->spo_must_allow[1] &= (
2520 1 << (OP_TEST_STATEID - 32) |
2521 1 << (OP_FREE_STATEID - 32));
2522 if (!svc_rqst_integrity_protected(rqstp)) {
2523 status = nfserr_inval;
2524 goto out_nolock;
2525 }
2526
2527
2528
2529
2530
2531 if (!new->cl_cred.cr_principal &&
2532 !new->cl_cred.cr_raw_principal) {
2533 status = nfserr_serverfault;
2534 goto out_nolock;
2535 }
2536 new->cl_mach_cred = true;
2537 case SP4_NONE:
2538 break;
2539 default:
2540 WARN_ON_ONCE(1);
2541 case SP4_SSV:
2542 status = nfserr_encr_alg_unsupp;
2543 goto out_nolock;
2544 }
2545
2546
2547 spin_lock(&nn->client_lock);
2548 conf = find_confirmed_client_by_name(&exid->clname, nn);
2549 if (conf) {
2550 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
2551 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
2552
2553 if (update) {
2554 if (!clp_used_exchangeid(conf)) {
2555 status = nfserr_inval;
2556 goto out;
2557 }
2558 if (!nfsd4_mach_creds_match(conf, rqstp)) {
2559 status = nfserr_wrong_cred;
2560 goto out;
2561 }
2562 if (!creds_match) {
2563 status = nfserr_perm;
2564 goto out;
2565 }
2566 if (!verfs_match) {
2567 status = nfserr_not_same;
2568 goto out;
2569 }
2570
2571 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
2572 goto out_copy;
2573 }
2574 if (!creds_match) {
2575 if (client_has_state(conf)) {
2576 status = nfserr_clid_inuse;
2577 goto out;
2578 }
2579 goto out_new;
2580 }
2581 if (verfs_match) {
2582 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
2583 goto out_copy;
2584 }
2585
2586 conf = NULL;
2587 goto out_new;
2588 }
2589
2590 if (update) {
2591 status = nfserr_noent;
2592 goto out;
2593 }
2594
2595 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
2596 if (unconf)
2597 unhash_client_locked(unconf);
2598
2599
2600out_new:
2601 if (conf) {
2602 status = mark_client_expired_locked(conf);
2603 if (status)
2604 goto out;
2605 }
2606 new->cl_minorversion = cstate->minorversion;
2607 new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
2608 new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
2609
2610 gen_clid(new, nn);
2611 add_to_unconfirmed(new);
2612 swap(new, conf);
2613out_copy:
2614 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
2615 exid->clientid.cl_id = conf->cl_clientid.cl_id;
2616
2617 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
2618 nfsd4_set_ex_flags(conf, exid);
2619
2620 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2621 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
2622 status = nfs_ok;
2623
2624out:
2625 spin_unlock(&nn->client_lock);
2626out_nolock:
2627 if (new)
2628 expire_client(new);
2629 if (unconf)
2630 expire_client(unconf);
2631 return status;
2632}
2633
2634static __be32
2635check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
2636{
2637 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2638 slot_seqid);
2639
2640
2641 if (slot_inuse) {
2642 if (seqid == slot_seqid)
2643 return nfserr_jukebox;
2644 else
2645 return nfserr_seq_misordered;
2646 }
2647
2648 if (likely(seqid == slot_seqid + 1))
2649 return nfs_ok;
2650 if (seqid == slot_seqid)
2651 return nfserr_replay_cache;
2652 return nfserr_seq_misordered;
2653}
2654
2655
2656
2657
2658
2659
2660static void
2661nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
2662 struct nfsd4_clid_slot *slot, __be32 nfserr)
2663{
2664 slot->sl_status = nfserr;
2665 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2666}
2667
2668static __be32
2669nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2670 struct nfsd4_clid_slot *slot)
2671{
2672 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2673 return slot->sl_status;
2674}
2675
2676#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2677 2 * 2 + \
2678 1 + \
2679 3 + \
2680 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2681 \
2682 4 ) * sizeof(__be32))
2683
2684#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2685 2 + \
2686 1 + \
2687 1 + \
2688 3 + \
2689 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2690 \
2691 5 ) * sizeof(__be32))
2692
2693static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
2694{
2695 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2696
2697 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2698 return nfserr_toosmall;
2699 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2700 return nfserr_toosmall;
2701 ca->headerpadsz = 0;
2702 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2703 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2704 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2705 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2706 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2707 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2708
2709
2710
2711
2712
2713
2714
2715
2716 ca->maxreqs = nfsd4_get_drc_mem(ca);
2717 if (!ca->maxreqs)
2718 return nfserr_jukebox;
2719
2720 return nfs_ok;
2721}
2722
2723
2724
2725
2726
2727#define RPC_MAX_HEADER_WITH_AUTH_SYS \
2728 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2729
2730#define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2731 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2732
2733#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2734 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
2735#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2736 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2737 sizeof(__be32))
2738
2739static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2740{
2741 ca->headerpadsz = 0;
2742
2743 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
2744 return nfserr_toosmall;
2745 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
2746 return nfserr_toosmall;
2747 ca->maxresp_cached = 0;
2748 if (ca->maxops < 2)
2749 return nfserr_toosmall;
2750
2751 return nfs_ok;
2752}
2753
2754static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2755{
2756 switch (cbs->flavor) {
2757 case RPC_AUTH_NULL:
2758 case RPC_AUTH_UNIX:
2759 return nfs_ok;
2760 default:
2761
2762
2763
2764
2765
2766
2767
2768 return nfserr_encr_alg_unsupp;
2769 }
2770}
2771
2772__be32
2773nfsd4_create_session(struct svc_rqst *rqstp,
2774 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
2775{
2776 struct nfsd4_create_session *cr_ses = &u->create_session;
2777 struct sockaddr *sa = svc_addr(rqstp);
2778 struct nfs4_client *conf, *unconf;
2779 struct nfs4_client *old = NULL;
2780 struct nfsd4_session *new;
2781 struct nfsd4_conn *conn;
2782 struct nfsd4_clid_slot *cs_slot = NULL;
2783 __be32 status = 0;
2784 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2785
2786 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2787 return nfserr_inval;
2788 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2789 if (status)
2790 return status;
2791 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
2792 if (status)
2793 return status;
2794 status = check_backchannel_attrs(&cr_ses->back_channel);
2795 if (status)
2796 goto out_release_drc_mem;
2797 status = nfserr_jukebox;
2798 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
2799 if (!new)
2800 goto out_release_drc_mem;
2801 conn = alloc_conn_from_crses(rqstp, cr_ses);
2802 if (!conn)
2803 goto out_free_session;
2804
2805 spin_lock(&nn->client_lock);
2806 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
2807 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
2808 WARN_ON_ONCE(conf && unconf);
2809
2810 if (conf) {
2811 status = nfserr_wrong_cred;
2812 if (!nfsd4_mach_creds_match(conf, rqstp))
2813 goto out_free_conn;
2814 cs_slot = &conf->cl_cs_slot;
2815 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2816 if (status) {
2817 if (status == nfserr_replay_cache)
2818 status = nfsd4_replay_create_session(cr_ses, cs_slot);
2819 goto out_free_conn;
2820 }
2821 } else if (unconf) {
2822 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
2823 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
2824 status = nfserr_clid_inuse;
2825 goto out_free_conn;
2826 }
2827 status = nfserr_wrong_cred;
2828 if (!nfsd4_mach_creds_match(unconf, rqstp))
2829 goto out_free_conn;
2830 cs_slot = &unconf->cl_cs_slot;
2831 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2832 if (status) {
2833
2834 status = nfserr_seq_misordered;
2835 goto out_free_conn;
2836 }
2837 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
2838 if (old) {
2839 status = mark_client_expired_locked(old);
2840 if (status) {
2841 old = NULL;
2842 goto out_free_conn;
2843 }
2844 }
2845 move_to_confirmed(unconf);
2846 conf = unconf;
2847 } else {
2848 status = nfserr_stale_clientid;
2849 goto out_free_conn;
2850 }
2851 status = nfs_ok;
2852
2853 cr_ses->flags &= ~SESSION4_PERSIST;
2854
2855 cr_ses->flags &= ~SESSION4_RDMA;
2856
2857 init_session(rqstp, new, conf, cr_ses);
2858 nfsd4_get_session_locked(new);
2859
2860 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
2861 NFS4_MAX_SESSIONID_LEN);
2862 cs_slot->sl_seqid++;
2863 cr_ses->seqid = cs_slot->sl_seqid;
2864
2865
2866 nfsd4_cache_create_session(cr_ses, cs_slot, status);
2867 spin_unlock(&nn->client_lock);
2868
2869 nfsd4_init_conn(rqstp, conn, new);
2870 nfsd4_put_session(new);
2871 if (old)
2872 expire_client(old);
2873 return status;
2874out_free_conn:
2875 spin_unlock(&nn->client_lock);
2876 free_conn(conn);
2877 if (old)
2878 expire_client(old);
2879out_free_session:
2880 __free_session(new);
2881out_release_drc_mem:
2882 nfsd4_put_drc_mem(&cr_ses->fore_channel);
2883 return status;
2884}
2885
2886static __be32 nfsd4_map_bcts_dir(u32 *dir)
2887{
2888 switch (*dir) {
2889 case NFS4_CDFC4_FORE:
2890 case NFS4_CDFC4_BACK:
2891 return nfs_ok;
2892 case NFS4_CDFC4_FORE_OR_BOTH:
2893 case NFS4_CDFC4_BACK_OR_BOTH:
2894 *dir = NFS4_CDFC4_BOTH;
2895 return nfs_ok;
2896 };
2897 return nfserr_inval;
2898}
2899
2900__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp,
2901 struct nfsd4_compound_state *cstate,
2902 union nfsd4_op_u *u)
2903{
2904 struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
2905 struct nfsd4_session *session = cstate->session;
2906 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2907 __be32 status;
2908
2909 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2910 if (status)
2911 return status;
2912 spin_lock(&nn->client_lock);
2913 session->se_cb_prog = bc->bc_cb_program;
2914 session->se_cb_sec = bc->bc_cb_sec;
2915 spin_unlock(&nn->client_lock);
2916
2917 nfsd4_probe_callback(session->se_client);
2918
2919 return nfs_ok;
2920}
2921
2922__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2923 struct nfsd4_compound_state *cstate,
2924 union nfsd4_op_u *u)
2925{
2926 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
2927 __be32 status;
2928 struct nfsd4_conn *conn;
2929 struct nfsd4_session *session;
2930 struct net *net = SVC_NET(rqstp);
2931 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2932
2933 if (!nfsd4_last_compound_op(rqstp))
2934 return nfserr_not_only_op;
2935 spin_lock(&nn->client_lock);
2936 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
2937 spin_unlock(&nn->client_lock);
2938 if (!session)
2939 goto out_no_session;
2940 status = nfserr_wrong_cred;
2941 if (!nfsd4_mach_creds_match(session->se_client, rqstp))
2942 goto out;
2943 status = nfsd4_map_bcts_dir(&bcts->dir);
2944 if (status)
2945 goto out;
2946 conn = alloc_conn(rqstp, bcts->dir);
2947 status = nfserr_jukebox;
2948 if (!conn)
2949 goto out;
2950 nfsd4_init_conn(rqstp, conn, session);
2951 status = nfs_ok;
2952out:
2953 nfsd4_put_session(session);
2954out_no_session:
2955 return status;
2956}
2957
2958static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2959{
2960 if (!session)
2961 return false;
2962 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2963}
2964
2965__be32
2966nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate,
2967 union nfsd4_op_u *u)
2968{
2969 struct nfsd4_destroy_session *sessionid = &u->destroy_session;
2970 struct nfsd4_session *ses;
2971 __be32 status;
2972 int ref_held_by_me = 0;
2973 struct net *net = SVC_NET(r);
2974 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2975
2976 status = nfserr_not_only_op;
2977 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
2978 if (!nfsd4_last_compound_op(r))
2979 goto out;
2980 ref_held_by_me++;
2981 }
2982 dump_sessionid(__func__, &sessionid->sessionid);
2983 spin_lock(&nn->client_lock);
2984 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
2985 if (!ses)
2986 goto out_client_lock;
2987 status = nfserr_wrong_cred;
2988 if (!nfsd4_mach_creds_match(ses->se_client, r))
2989 goto out_put_session;
2990 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
2991 if (status)
2992 goto out_put_session;
2993 unhash_session(ses);
2994 spin_unlock(&nn->client_lock);
2995
2996 nfsd4_probe_callback_sync(ses->se_client);
2997
2998 spin_lock(&nn->client_lock);
2999 status = nfs_ok;
3000out_put_session:
3001 nfsd4_put_session_locked(ses);
3002out_client_lock:
3003 spin_unlock(&nn->client_lock);
3004out:
3005 return status;
3006}
3007
3008static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
3009{
3010 struct nfsd4_conn *c;
3011
3012 list_for_each_entry(c, &s->se_conns, cn_persession) {
3013 if (c->cn_xprt == xpt) {
3014 return c;
3015 }
3016 }
3017 return NULL;
3018}
3019
3020static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
3021{
3022 struct nfs4_client *clp = ses->se_client;
3023 struct nfsd4_conn *c;
3024 __be32 status = nfs_ok;
3025 int ret;
3026
3027 spin_lock(&clp->cl_lock);
3028 c = __nfsd4_find_conn(new->cn_xprt, ses);
3029 if (c)
3030 goto out_free;
3031 status = nfserr_conn_not_bound_to_session;
3032 if (clp->cl_mach_cred)
3033 goto out_free;
3034 __nfsd4_hash_conn(new, ses);
3035 spin_unlock(&clp->cl_lock);
3036 ret = nfsd4_register_conn(new);
3037 if (ret)
3038
3039 nfsd4_conn_lost(&new->cn_xpt_user);
3040 return nfs_ok;
3041out_free:
3042 spin_unlock(&clp->cl_lock);
3043 free_conn(new);
3044 return status;
3045}
3046
3047static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
3048{
3049 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3050
3051 return args->opcnt > session->se_fchannel.maxops;
3052}
3053
3054static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
3055 struct nfsd4_session *session)
3056{
3057 struct xdr_buf *xb = &rqstp->rq_arg;
3058
3059 return xb->len > session->se_fchannel.maxreq_sz;
3060}
3061
3062static bool replay_matches_cache(struct svc_rqst *rqstp,
3063 struct nfsd4_sequence *seq, struct nfsd4_slot *slot)
3064{
3065 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3066
3067 if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=
3068 (bool)seq->cachethis)
3069 return false;
3070
3071
3072
3073
3074
3075
3076 if (slot->sl_opcnt < argp->opcnt)
3077 return false;
3078
3079 if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))
3080 return false;
3081
3082
3083
3084
3085
3086
3087 return true;
3088}
3089
3090__be32
3091nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3092 union nfsd4_op_u *u)
3093{
3094 struct nfsd4_sequence *seq = &u->sequence;
3095 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3096 struct xdr_stream *xdr = &resp->xdr;
3097 struct nfsd4_session *session;
3098 struct nfs4_client *clp;
3099 struct nfsd4_slot *slot;
3100 struct nfsd4_conn *conn;
3101 __be32 status;
3102 int buflen;
3103 struct net *net = SVC_NET(rqstp);
3104 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3105
3106 if (resp->opcnt != 1)
3107 return nfserr_sequence_pos;
3108
3109
3110
3111
3112
3113 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
3114 if (!conn)
3115 return nfserr_jukebox;
3116
3117 spin_lock(&nn->client_lock);
3118 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
3119 if (!session)
3120 goto out_no_session;
3121 clp = session->se_client;
3122
3123 status = nfserr_too_many_ops;
3124 if (nfsd4_session_too_many_ops(rqstp, session))
3125 goto out_put_session;
3126
3127 status = nfserr_req_too_big;
3128 if (nfsd4_request_too_big(rqstp, session))
3129 goto out_put_session;
3130
3131 status = nfserr_badslot;
3132 if (seq->slotid >= session->se_fchannel.maxreqs)
3133 goto out_put_session;
3134
3135 slot = session->se_slots[seq->slotid];
3136 dprintk("%s: slotid %d\n", __func__, seq->slotid);
3137
3138
3139
3140
3141 seq->maxslots = session->se_fchannel.maxreqs;
3142
3143 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
3144 slot->sl_flags & NFSD4_SLOT_INUSE);
3145 if (status == nfserr_replay_cache) {
3146 status = nfserr_seq_misordered;
3147 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
3148 goto out_put_session;
3149 status = nfserr_seq_false_retry;
3150 if (!replay_matches_cache(rqstp, seq, slot))
3151 goto out_put_session;
3152 cstate->slot = slot;
3153 cstate->session = session;
3154 cstate->clp = clp;
3155
3156
3157 status = nfsd4_replay_cache_entry(resp, seq);
3158 cstate->status = nfserr_replay_cache;
3159 goto out;
3160 }
3161 if (status)
3162 goto out_put_session;
3163
3164 status = nfsd4_sequence_check_conn(conn, session);
3165 conn = NULL;
3166 if (status)
3167 goto out_put_session;
3168
3169 buflen = (seq->cachethis) ?
3170 session->se_fchannel.maxresp_cached :
3171 session->se_fchannel.maxresp_sz;
3172 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
3173 nfserr_rep_too_big;
3174 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
3175 goto out_put_session;
3176 svc_reserve(rqstp, buflen);
3177
3178 status = nfs_ok;
3179
3180 slot->sl_seqid = seq->seqid;
3181 slot->sl_flags |= NFSD4_SLOT_INUSE;
3182 if (seq->cachethis)
3183 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
3184 else
3185 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
3186
3187 cstate->slot = slot;
3188 cstate->session = session;
3189 cstate->clp = clp;
3190
3191out:
3192 switch (clp->cl_cb_state) {
3193 case NFSD4_CB_DOWN:
3194 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
3195 break;
3196 case NFSD4_CB_FAULT:
3197 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
3198 break;
3199 default:
3200 seq->status_flags = 0;
3201 }
3202 if (!list_empty(&clp->cl_revoked))
3203 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
3204out_no_session:
3205 if (conn)
3206 free_conn(conn);
3207 spin_unlock(&nn->client_lock);
3208 return status;
3209out_put_session:
3210 nfsd4_put_session_locked(session);
3211 goto out_no_session;
3212}
3213
3214void
3215nfsd4_sequence_done(struct nfsd4_compoundres *resp)
3216{
3217 struct nfsd4_compound_state *cs = &resp->cstate;
3218
3219 if (nfsd4_has_session(cs)) {
3220 if (cs->status != nfserr_replay_cache) {
3221 nfsd4_store_cache_entry(resp);
3222 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3223 }
3224
3225 nfsd4_put_session(cs->session);
3226 } else if (cs->clp)
3227 put_client_renew(cs->clp);
3228}
3229
3230__be32
3231nfsd4_destroy_clientid(struct svc_rqst *rqstp,
3232 struct nfsd4_compound_state *cstate,
3233 union nfsd4_op_u *u)
3234{
3235 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
3236 struct nfs4_client *conf, *unconf;
3237 struct nfs4_client *clp = NULL;
3238 __be32 status = 0;
3239 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3240
3241 spin_lock(&nn->client_lock);
3242 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
3243 conf = find_confirmed_client(&dc->clientid, true, nn);
3244 WARN_ON_ONCE(conf && unconf);
3245
3246 if (conf) {
3247 if (client_has_state(conf)) {
3248 status = nfserr_clientid_busy;
3249 goto out;
3250 }
3251 status = mark_client_expired_locked(conf);
3252 if (status)
3253 goto out;
3254 clp = conf;
3255 } else if (unconf)
3256 clp = unconf;
3257 else {
3258 status = nfserr_stale_clientid;
3259 goto out;
3260 }
3261 if (!nfsd4_mach_creds_match(clp, rqstp)) {
3262 clp = NULL;
3263 status = nfserr_wrong_cred;
3264 goto out;
3265 }
3266 unhash_client_locked(clp);
3267out:
3268 spin_unlock(&nn->client_lock);
3269 if (clp)
3270 expire_client(clp);
3271 return status;
3272}
3273
3274__be32
3275nfsd4_reclaim_complete(struct svc_rqst *rqstp,
3276 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
3277{
3278 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
3279 __be32 status = 0;
3280
3281 if (rc->rca_one_fs) {
3282 if (!cstate->current_fh.fh_dentry)
3283 return nfserr_nofilehandle;
3284
3285
3286
3287
3288 return nfs_ok;
3289 }
3290
3291 status = nfserr_complete_already;
3292 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
3293 &cstate->session->se_client->cl_flags))
3294 goto out;
3295
3296 status = nfserr_stale_clientid;
3297 if (is_client_expired(cstate->session->se_client))
3298
3299
3300
3301
3302
3303
3304
3305 goto out;
3306
3307 status = nfs_ok;
3308 nfsd4_client_record_create(cstate->session->se_client);
3309out:
3310 return status;
3311}
3312
3313__be32
3314nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3315 union nfsd4_op_u *u)
3316{
3317 struct nfsd4_setclientid *setclid = &u->setclientid;
3318 struct xdr_netobj clname = setclid->se_name;
3319 nfs4_verifier clverifier = setclid->se_verf;
3320 struct nfs4_client *conf, *new;
3321 struct nfs4_client *unconf = NULL;
3322 __be32 status;
3323 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3324
3325 new = create_client(clname, rqstp, &clverifier);
3326 if (new == NULL)
3327 return nfserr_jukebox;
3328
3329 spin_lock(&nn->client_lock);
3330 conf = find_confirmed_client_by_name(&clname, nn);
3331 if (conf && client_has_state(conf)) {
3332
3333 status = nfserr_clid_inuse;
3334 if (clp_used_exchangeid(conf))
3335 goto out;
3336 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
3337 char addr_str[INET6_ADDRSTRLEN];
3338 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
3339 sizeof(addr_str));
3340 dprintk("NFSD: setclientid: string in use by client "
3341 "at %s\n", addr_str);
3342 goto out;
3343 }
3344 }
3345 unconf = find_unconfirmed_client_by_name(&clname, nn);
3346 if (unconf)
3347 unhash_client_locked(unconf);
3348 if (conf && same_verf(&conf->cl_verifier, &clverifier)) {
3349
3350 copy_clid(new, conf);
3351 gen_confirm(new, nn);
3352 } else
3353 gen_clid(new, nn);
3354 new->cl_minorversion = 0;
3355 gen_callback(new, setclid, rqstp);
3356 add_to_unconfirmed(new);
3357 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
3358 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
3359 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
3360 new = NULL;
3361 status = nfs_ok;
3362out:
3363 spin_unlock(&nn->client_lock);
3364 if (new)
3365 free_client(new);
3366 if (unconf)
3367 expire_client(unconf);
3368 return status;
3369}
3370
3371
3372__be32
3373nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
3374 struct nfsd4_compound_state *cstate,
3375 union nfsd4_op_u *u)
3376{
3377 struct nfsd4_setclientid_confirm *setclientid_confirm =
3378 &u->setclientid_confirm;
3379 struct nfs4_client *conf, *unconf;
3380 struct nfs4_client *old = NULL;
3381 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
3382 clientid_t * clid = &setclientid_confirm->sc_clientid;
3383 __be32 status;
3384 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3385
3386 if (STALE_CLIENTID(clid, nn))
3387 return nfserr_stale_clientid;
3388
3389 spin_lock(&nn->client_lock);
3390 conf = find_confirmed_client(clid, false, nn);
3391 unconf = find_unconfirmed_client(clid, false, nn);
3392
3393
3394
3395
3396
3397
3398
3399 status = nfserr_clid_inuse;
3400 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
3401 goto out;
3402 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
3403 goto out;
3404
3405 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
3406 if (conf && same_verf(&confirm, &conf->cl_confirm)) {
3407
3408 status = nfs_ok;
3409 } else
3410 status = nfserr_stale_clientid;
3411 goto out;
3412 }
3413 status = nfs_ok;
3414 if (conf) {
3415 old = unconf;
3416 unhash_client_locked(old);
3417 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
3418 } else {
3419 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3420 if (old) {
3421 status = nfserr_clid_inuse;
3422 if (client_has_state(old)
3423 && !same_creds(&unconf->cl_cred,
3424 &old->cl_cred))
3425 goto out;
3426 status = mark_client_expired_locked(old);
3427 if (status) {
3428 old = NULL;
3429 goto out;
3430 }
3431 }
3432 move_to_confirmed(unconf);
3433 conf = unconf;
3434 }
3435 get_client_locked(conf);
3436 spin_unlock(&nn->client_lock);
3437 nfsd4_probe_callback(conf);
3438 spin_lock(&nn->client_lock);
3439 put_client_renew_locked(conf);
3440out:
3441 spin_unlock(&nn->client_lock);
3442 if (old)
3443 expire_client(old);
3444 return status;
3445}
3446
3447static struct nfs4_file *nfsd4_alloc_file(void)
3448{
3449 return kmem_cache_alloc(file_slab, GFP_KERNEL);
3450}
3451
3452
3453static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
3454 struct nfs4_file *fp)
3455{
3456 lockdep_assert_held(&state_lock);
3457
3458 refcount_set(&fp->fi_ref, 1);
3459 spin_lock_init(&fp->fi_lock);
3460 INIT_LIST_HEAD(&fp->fi_stateids);
3461 INIT_LIST_HEAD(&fp->fi_delegations);
3462 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
3463 fh_copy_shallow(&fp->fi_fhandle, fh);
3464 fp->fi_deleg_file = NULL;
3465 fp->fi_had_conflict = false;
3466 fp->fi_share_deny = 0;
3467 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
3468 memset(fp->fi_access, 0, sizeof(fp->fi_access));
3469#ifdef CONFIG_NFSD_PNFS
3470 INIT_LIST_HEAD(&fp->fi_lo_states);
3471 atomic_set(&fp->fi_lo_recalls, 0);
3472#endif
3473 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
3474}
3475
3476void
3477nfsd4_free_slabs(void)
3478{
3479 kmem_cache_destroy(client_slab);
3480 kmem_cache_destroy(openowner_slab);
3481 kmem_cache_destroy(lockowner_slab);
3482 kmem_cache_destroy(file_slab);
3483 kmem_cache_destroy(stateid_slab);
3484 kmem_cache_destroy(deleg_slab);
3485 kmem_cache_destroy(odstate_slab);
3486}
3487
3488int
3489nfsd4_init_slabs(void)
3490{
3491 client_slab = kmem_cache_create("nfsd4_clients",
3492 sizeof(struct nfs4_client), 0, 0, NULL);
3493 if (client_slab == NULL)
3494 goto out;
3495 openowner_slab = kmem_cache_create("nfsd4_openowners",
3496 sizeof(struct nfs4_openowner), 0, 0, NULL);
3497 if (openowner_slab == NULL)
3498 goto out_free_client_slab;
3499 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
3500 sizeof(struct nfs4_lockowner), 0, 0, NULL);
3501 if (lockowner_slab == NULL)
3502 goto out_free_openowner_slab;
3503 file_slab = kmem_cache_create("nfsd4_files",
3504 sizeof(struct nfs4_file), 0, 0, NULL);
3505 if (file_slab == NULL)
3506 goto out_free_lockowner_slab;
3507 stateid_slab = kmem_cache_create("nfsd4_stateids",
3508 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
3509 if (stateid_slab == NULL)
3510 goto out_free_file_slab;
3511 deleg_slab = kmem_cache_create("nfsd4_delegations",
3512 sizeof(struct nfs4_delegation), 0, 0, NULL);
3513 if (deleg_slab == NULL)
3514 goto out_free_stateid_slab;
3515 odstate_slab = kmem_cache_create("nfsd4_odstate",
3516 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
3517 if (odstate_slab == NULL)
3518 goto out_free_deleg_slab;
3519 return 0;
3520
3521out_free_deleg_slab:
3522 kmem_cache_destroy(deleg_slab);
3523out_free_stateid_slab:
3524 kmem_cache_destroy(stateid_slab);
3525out_free_file_slab:
3526 kmem_cache_destroy(file_slab);
3527out_free_lockowner_slab:
3528 kmem_cache_destroy(lockowner_slab);
3529out_free_openowner_slab:
3530 kmem_cache_destroy(openowner_slab);
3531out_free_client_slab:
3532 kmem_cache_destroy(client_slab);
3533out:
3534 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3535 return -ENOMEM;
3536}
3537
3538static void init_nfs4_replay(struct nfs4_replay *rp)
3539{
3540 rp->rp_status = nfserr_serverfault;
3541 rp->rp_buflen = 0;
3542 rp->rp_buf = rp->rp_ibuf;
3543 mutex_init(&rp->rp_mutex);
3544}
3545
3546static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
3547 struct nfs4_stateowner *so)
3548{
3549 if (!nfsd4_has_session(cstate)) {
3550 mutex_lock(&so->so_replay.rp_mutex);
3551 cstate->replay_owner = nfs4_get_stateowner(so);
3552 }
3553}
3554
3555void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
3556{
3557 struct nfs4_stateowner *so = cstate->replay_owner;
3558
3559 if (so != NULL) {
3560 cstate->replay_owner = NULL;
3561 mutex_unlock(&so->so_replay.rp_mutex);
3562 nfs4_put_stateowner(so);
3563 }
3564}
3565
3566static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
3567{
3568 struct nfs4_stateowner *sop;
3569
3570 sop = kmem_cache_alloc(slab, GFP_KERNEL);
3571 if (!sop)
3572 return NULL;
3573
3574 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
3575 if (!sop->so_owner.data) {
3576 kmem_cache_free(slab, sop);
3577 return NULL;
3578 }
3579 sop->so_owner.len = owner->len;
3580
3581 INIT_LIST_HEAD(&sop->so_stateids);
3582 sop->so_client = clp;
3583 init_nfs4_replay(&sop->so_replay);
3584 atomic_set(&sop->so_count, 1);
3585 return sop;
3586}
3587
3588static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
3589{
3590 lockdep_assert_held(&clp->cl_lock);
3591
3592 list_add(&oo->oo_owner.so_strhash,
3593 &clp->cl_ownerstr_hashtbl[strhashval]);
3594 list_add(&oo->oo_perclient, &clp->cl_openowners);
3595}
3596
3597static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
3598{
3599 unhash_openowner_locked(openowner(so));
3600}
3601
3602static void nfs4_free_openowner(struct nfs4_stateowner *so)
3603{
3604 struct nfs4_openowner *oo = openowner(so);
3605
3606 kmem_cache_free(openowner_slab, oo);
3607}
3608
3609static const struct nfs4_stateowner_operations openowner_ops = {
3610 .so_unhash = nfs4_unhash_openowner,
3611 .so_free = nfs4_free_openowner,
3612};
3613
3614static struct nfs4_ol_stateid *
3615nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
3616{
3617 struct nfs4_ol_stateid *local, *ret = NULL;
3618 struct nfs4_openowner *oo = open->op_openowner;
3619
3620 lockdep_assert_held(&fp->fi_lock);
3621
3622 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3623
3624 if (local->st_stateowner->so_is_open_owner == 0)
3625 continue;
3626 if (local->st_stateowner != &oo->oo_owner)
3627 continue;
3628 if (local->st_stid.sc_type == NFS4_OPEN_STID) {
3629 ret = local;
3630 refcount_inc(&ret->st_stid.sc_count);
3631 break;
3632 }
3633 }
3634 return ret;
3635}
3636
3637static __be32
3638nfsd4_verify_open_stid(struct nfs4_stid *s)
3639{
3640 __be32 ret = nfs_ok;
3641
3642 switch (s->sc_type) {
3643 default:
3644 break;
3645 case 0:
3646 case NFS4_CLOSED_STID:
3647 case NFS4_CLOSED_DELEG_STID:
3648 ret = nfserr_bad_stateid;
3649 break;
3650 case NFS4_REVOKED_DELEG_STID:
3651 ret = nfserr_deleg_revoked;
3652 }
3653 return ret;
3654}
3655
3656
3657static __be32
3658nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp)
3659{
3660 __be32 ret;
3661
3662 mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);
3663 ret = nfsd4_verify_open_stid(&stp->st_stid);
3664 if (ret != nfs_ok)
3665 mutex_unlock(&stp->st_mutex);
3666 return ret;
3667}
3668
3669static struct nfs4_ol_stateid *
3670nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
3671{
3672 struct nfs4_ol_stateid *stp;
3673 for (;;) {
3674 spin_lock(&fp->fi_lock);
3675 stp = nfsd4_find_existing_open(fp, open);
3676 spin_unlock(&fp->fi_lock);
3677 if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok)
3678 break;
3679 nfs4_put_stid(&stp->st_stid);
3680 }
3681 return stp;
3682}
3683
3684static struct nfs4_openowner *
3685alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
3686 struct nfsd4_compound_state *cstate)
3687{
3688 struct nfs4_client *clp = cstate->clp;
3689 struct nfs4_openowner *oo, *ret;
3690
3691 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
3692 if (!oo)
3693 return NULL;
3694 oo->oo_owner.so_ops = &openowner_ops;
3695 oo->oo_owner.so_is_open_owner = 1;
3696 oo->oo_owner.so_seqid = open->op_seqid;
3697 oo->oo_flags = 0;
3698 if (nfsd4_has_session(cstate))
3699 oo->oo_flags |= NFS4_OO_CONFIRMED;
3700 oo->oo_time = 0;
3701 oo->oo_last_closed_stid = NULL;
3702 INIT_LIST_HEAD(&oo->oo_close_lru);
3703 spin_lock(&clp->cl_lock);
3704 ret = find_openstateowner_str_locked(strhashval, open, clp);
3705 if (ret == NULL) {
3706 hash_openowner(oo, clp, strhashval);
3707 ret = oo;
3708 } else
3709 nfs4_free_stateowner(&oo->oo_owner);
3710
3711 spin_unlock(&clp->cl_lock);
3712 return ret;
3713}
3714
3715static struct nfs4_ol_stateid *
3716init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
3717{
3718
3719 struct nfs4_openowner *oo = open->op_openowner;
3720 struct nfs4_ol_stateid *retstp = NULL;
3721 struct nfs4_ol_stateid *stp;
3722
3723 stp = open->op_stp;
3724
3725 mutex_init(&stp->st_mutex);
3726 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
3727
3728retry:
3729 spin_lock(&oo->oo_owner.so_client->cl_lock);
3730 spin_lock(&fp->fi_lock);
3731
3732 retstp = nfsd4_find_existing_open(fp, open);
3733 if (retstp)
3734 goto out_unlock;
3735
3736 open->op_stp = NULL;
3737 refcount_inc(&stp->st_stid.sc_count);
3738 stp->st_stid.sc_type = NFS4_OPEN_STID;
3739 INIT_LIST_HEAD(&stp->st_locks);
3740 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
3741 get_nfs4_file(fp);
3742 stp->st_stid.sc_file = fp;
3743 stp->st_access_bmap = 0;
3744 stp->st_deny_bmap = 0;
3745 stp->st_openstp = NULL;
3746 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
3747 list_add(&stp->st_perfile, &fp->fi_stateids);
3748
3749out_unlock:
3750 spin_unlock(&fp->fi_lock);
3751 spin_unlock(&oo->oo_owner.so_client->cl_lock);
3752 if (retstp) {
3753
3754 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
3755 nfs4_put_stid(&retstp->st_stid);
3756 goto retry;
3757 }
3758
3759 mutex_unlock(&stp->st_mutex);
3760 stp = retstp;
3761 }
3762 return stp;
3763}
3764
3765
3766
3767
3768
3769
3770static void
3771move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
3772{
3773 struct nfs4_ol_stateid *last;
3774 struct nfs4_openowner *oo = openowner(s->st_stateowner);
3775 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
3776 nfsd_net_id);
3777
3778 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789 wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);
3790
3791 release_all_access(s);
3792 if (s->st_stid.sc_file) {
3793 put_nfs4_file(s->st_stid.sc_file);
3794 s->st_stid.sc_file = NULL;
3795 }
3796
3797 spin_lock(&nn->client_lock);
3798 last = oo->oo_last_closed_stid;
3799 oo->oo_last_closed_stid = s;
3800 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
3801 oo->oo_time = get_seconds();
3802 spin_unlock(&nn->client_lock);
3803 if (last)
3804 nfs4_put_stid(&last->st_stid);
3805}
3806
3807
3808static struct nfs4_file *
3809find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
3810{
3811 struct nfs4_file *fp;
3812
3813 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
3814 if (fh_match(&fp->fi_fhandle, fh)) {
3815 if (refcount_inc_not_zero(&fp->fi_ref))
3816 return fp;
3817 }
3818 }
3819 return NULL;
3820}
3821
3822struct nfs4_file *
3823find_file(struct knfsd_fh *fh)
3824{
3825 struct nfs4_file *fp;
3826 unsigned int hashval = file_hashval(fh);
3827
3828 rcu_read_lock();
3829 fp = find_file_locked(fh, hashval);
3830 rcu_read_unlock();
3831 return fp;
3832}
3833
3834static struct nfs4_file *
3835find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
3836{
3837 struct nfs4_file *fp;
3838 unsigned int hashval = file_hashval(fh);
3839
3840 rcu_read_lock();
3841 fp = find_file_locked(fh, hashval);
3842 rcu_read_unlock();
3843 if (fp)
3844 return fp;
3845
3846 spin_lock(&state_lock);
3847 fp = find_file_locked(fh, hashval);
3848 if (likely(fp == NULL)) {
3849 nfsd4_init_file(fh, hashval, new);
3850 fp = new;
3851 }
3852 spin_unlock(&state_lock);
3853
3854 return fp;
3855}
3856
3857
3858
3859
3860
3861static __be32
3862nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3863{
3864 struct nfs4_file *fp;
3865 __be32 ret = nfs_ok;
3866
3867 fp = find_file(¤t_fh->fh_handle);
3868 if (!fp)
3869 return ret;
3870
3871 spin_lock(&fp->fi_lock);
3872 if (fp->fi_share_deny & deny_type)
3873 ret = nfserr_locked;
3874 spin_unlock(&fp->fi_lock);
3875 put_nfs4_file(fp);
3876 return ret;
3877}
3878
3879static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
3880{
3881 struct nfs4_delegation *dp = cb_to_delegation(cb);
3882 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
3883 nfsd_net_id);
3884
3885 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
3886
3887
3888
3889
3890
3891
3892
3893
3894 spin_lock(&state_lock);
3895 if (dp->dl_time == 0) {
3896 dp->dl_time = get_seconds();
3897 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
3898 }
3899 spin_unlock(&state_lock);
3900}
3901
3902static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
3903 struct rpc_task *task)
3904{
3905 struct nfs4_delegation *dp = cb_to_delegation(cb);
3906
3907 if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID)
3908 return 1;
3909
3910 switch (task->tk_status) {
3911 case 0:
3912 return 1;
3913 case -EBADHANDLE:
3914 case -NFS4ERR_BAD_STATEID:
3915
3916
3917
3918
3919 if (dp->dl_retries--) {
3920 rpc_delay(task, 2 * HZ);
3921 return 0;
3922 }
3923
3924 default:
3925 return -1;
3926 }
3927}
3928
3929static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
3930{
3931 struct nfs4_delegation *dp = cb_to_delegation(cb);
3932
3933 nfs4_put_stid(&dp->dl_stid);
3934}
3935
3936static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
3937 .prepare = nfsd4_cb_recall_prepare,
3938 .done = nfsd4_cb_recall_done,
3939 .release = nfsd4_cb_recall_release,
3940};
3941
3942static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3943{
3944
3945
3946
3947
3948
3949
3950
3951 refcount_inc(&dp->dl_stid.sc_count);
3952 nfsd4_run_cb(&dp->dl_recall);
3953}
3954
3955
3956static bool
3957nfsd_break_deleg_cb(struct file_lock *fl)
3958{
3959 bool ret = false;
3960 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
3961 struct nfs4_file *fp = dp->dl_stid.sc_file;
3962
3963
3964
3965
3966
3967
3968 fl->fl_break_time = 0;
3969
3970 spin_lock(&fp->fi_lock);
3971 fp->fi_had_conflict = true;
3972 nfsd_break_one_deleg(dp);
3973 spin_unlock(&fp->fi_lock);
3974 return ret;
3975}
3976
3977static int
3978nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
3979 struct list_head *dispose)
3980{
3981 if (arg & F_UNLCK)
3982 return lease_modify(onlist, arg, dispose);
3983 else
3984 return -EAGAIN;
3985}
3986
3987static const struct lock_manager_operations nfsd_lease_mng_ops = {
3988 .lm_break = nfsd_break_deleg_cb,
3989 .lm_change = nfsd_change_deleg_cb,
3990};
3991
3992static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3993{
3994 if (nfsd4_has_session(cstate))
3995 return nfs_ok;
3996 if (seqid == so->so_seqid - 1)
3997 return nfserr_replay_me;
3998 if (seqid == so->so_seqid)
3999 return nfs_ok;
4000 return nfserr_bad_seqid;
4001}
4002
4003static __be32 lookup_clientid(clientid_t *clid,
4004 struct nfsd4_compound_state *cstate,
4005 struct nfsd_net *nn)
4006{
4007 struct nfs4_client *found;
4008
4009 if (cstate->clp) {
4010 found = cstate->clp;
4011 if (!same_clid(&found->cl_clientid, clid))
4012 return nfserr_stale_clientid;
4013 return nfs_ok;
4014 }
4015
4016 if (STALE_CLIENTID(clid, nn))
4017 return nfserr_stale_clientid;
4018
4019
4020
4021
4022
4023
4024 WARN_ON_ONCE(cstate->session);
4025 spin_lock(&nn->client_lock);
4026 found = find_confirmed_client(clid, false, nn);
4027 if (!found) {
4028 spin_unlock(&nn->client_lock);
4029 return nfserr_expired;
4030 }
4031 atomic_inc(&found->cl_refcount);
4032 spin_unlock(&nn->client_lock);
4033
4034
4035 cstate->clp = found;
4036 return nfs_ok;
4037}
4038
4039__be32
4040nfsd4_process_open1(struct nfsd4_compound_state *cstate,
4041 struct nfsd4_open *open, struct nfsd_net *nn)
4042{
4043 clientid_t *clientid = &open->op_clientid;
4044 struct nfs4_client *clp = NULL;
4045 unsigned int strhashval;
4046 struct nfs4_openowner *oo = NULL;
4047 __be32 status;
4048
4049 if (STALE_CLIENTID(&open->op_clientid, nn))
4050 return nfserr_stale_clientid;
4051
4052
4053
4054
4055 open->op_file = nfsd4_alloc_file();
4056 if (open->op_file == NULL)
4057 return nfserr_jukebox;
4058
4059 status = lookup_clientid(clientid, cstate, nn);
4060 if (status)
4061 return status;
4062 clp = cstate->clp;
4063
4064 strhashval = ownerstr_hashval(&open->op_owner);
4065 oo = find_openstateowner_str(strhashval, open, clp);
4066 open->op_openowner = oo;
4067 if (!oo) {
4068 goto new_owner;
4069 }
4070 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
4071
4072 release_openowner(oo);
4073 open->op_openowner = NULL;
4074 goto new_owner;
4075 }
4076 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
4077 if (status)
4078 return status;
4079 goto alloc_stateid;
4080new_owner:
4081 oo = alloc_init_open_stateowner(strhashval, open, cstate);
4082 if (oo == NULL)
4083 return nfserr_jukebox;
4084 open->op_openowner = oo;
4085alloc_stateid:
4086 open->op_stp = nfs4_alloc_open_stateid(clp);
4087 if (!open->op_stp)
4088 return nfserr_jukebox;
4089
4090 if (nfsd4_has_session(cstate) &&
4091 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
4092 open->op_odstate = alloc_clnt_odstate(clp);
4093 if (!open->op_odstate)
4094 return nfserr_jukebox;
4095 }
4096
4097 return nfs_ok;
4098}
4099
4100static inline __be32
4101nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
4102{
4103 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
4104 return nfserr_openmode;
4105 else
4106 return nfs_ok;
4107}
4108
4109static int share_access_to_flags(u32 share_access)
4110{
4111 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
4112}
4113
4114static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
4115{
4116 struct nfs4_stid *ret;
4117
4118 ret = find_stateid_by_type(cl, s,
4119 NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID);
4120 if (!ret)
4121 return NULL;
4122 return delegstateid(ret);
4123}
4124
4125static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
4126{
4127 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
4128 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
4129}
4130
4131static __be32
4132nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
4133 struct nfs4_delegation **dp)
4134{
4135 int flags;
4136 __be32 status = nfserr_bad_stateid;
4137 struct nfs4_delegation *deleg;
4138
4139 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
4140 if (deleg == NULL)
4141 goto out;
4142 if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {
4143 nfs4_put_stid(&deleg->dl_stid);
4144 if (cl->cl_minorversion)
4145 status = nfserr_deleg_revoked;
4146 goto out;
4147 }
4148 flags = share_access_to_flags(open->op_share_access);
4149 status = nfs4_check_delegmode(deleg, flags);
4150 if (status) {
4151 nfs4_put_stid(&deleg->dl_stid);
4152 goto out;
4153 }
4154 *dp = deleg;
4155out:
4156 if (!nfsd4_is_deleg_cur(open))
4157 return nfs_ok;
4158 if (status)
4159 return status;
4160 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4161 return nfs_ok;
4162}
4163
4164static inline int nfs4_access_to_access(u32 nfs4_access)
4165{
4166 int flags = 0;
4167
4168 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
4169 flags |= NFSD_MAY_READ;
4170 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
4171 flags |= NFSD_MAY_WRITE;
4172 return flags;
4173}
4174
4175static inline __be32
4176nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
4177 struct nfsd4_open *open)
4178{
4179 struct iattr iattr = {
4180 .ia_valid = ATTR_SIZE,
4181 .ia_size = 0,
4182 };
4183 if (!open->op_truncate)
4184 return 0;
4185 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
4186 return nfserr_inval;
4187 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
4188}
4189
4190static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
4191 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
4192 struct nfsd4_open *open)
4193{
4194 struct file *filp = NULL;
4195 __be32 status;
4196 int oflag = nfs4_access_to_omode(open->op_share_access);
4197 int access = nfs4_access_to_access(open->op_share_access);
4198 unsigned char old_access_bmap, old_deny_bmap;
4199
4200 spin_lock(&fp->fi_lock);
4201
4202
4203
4204
4205
4206 status = nfs4_file_check_deny(fp, open->op_share_deny);
4207 if (status != nfs_ok) {
4208 spin_unlock(&fp->fi_lock);
4209 goto out;
4210 }
4211
4212
4213 status = nfs4_file_get_access(fp, open->op_share_access);
4214 if (status != nfs_ok) {
4215 spin_unlock(&fp->fi_lock);
4216 goto out;
4217 }
4218
4219
4220 old_access_bmap = stp->st_access_bmap;
4221 set_access(open->op_share_access, stp);
4222
4223
4224 old_deny_bmap = stp->st_deny_bmap;
4225 set_deny(open->op_share_deny, stp);
4226 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4227
4228 if (!fp->fi_fds[oflag]) {
4229 spin_unlock(&fp->fi_lock);
4230 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
4231 if (status)
4232 goto out_put_access;
4233 spin_lock(&fp->fi_lock);
4234 if (!fp->fi_fds[oflag]) {
4235 fp->fi_fds[oflag] = filp;
4236 filp = NULL;
4237 }
4238 }
4239 spin_unlock(&fp->fi_lock);
4240 if (filp)
4241 fput(filp);
4242
4243 status = nfsd4_truncate(rqstp, cur_fh, open);
4244 if (status)
4245 goto out_put_access;
4246out:
4247 return status;
4248out_put_access:
4249 stp->st_access_bmap = old_access_bmap;
4250 nfs4_file_put_access(fp, open->op_share_access);
4251 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
4252 goto out;
4253}
4254
4255static __be32
4256nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
4257{
4258 __be32 status;
4259 unsigned char old_deny_bmap = stp->st_deny_bmap;
4260
4261 if (!test_access(open->op_share_access, stp))
4262 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
4263
4264
4265 spin_lock(&fp->fi_lock);
4266 status = nfs4_file_check_deny(fp, open->op_share_deny);
4267 if (status == nfs_ok) {
4268 set_deny(open->op_share_deny, stp);
4269 fp->fi_share_deny |=
4270 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4271 }
4272 spin_unlock(&fp->fi_lock);
4273
4274 if (status != nfs_ok)
4275 return status;
4276
4277 status = nfsd4_truncate(rqstp, cur_fh, open);
4278 if (status != nfs_ok)
4279 reset_union_bmap_deny(old_deny_bmap, stp);
4280 return status;
4281}
4282
4283
4284static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
4285{
4286 if (clp->cl_cb_state == NFSD4_CB_UP)
4287 return true;
4288
4289
4290
4291
4292
4293 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
4294}
4295
4296static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp,
4297 int flag)
4298{
4299 struct file_lock *fl;
4300
4301 fl = locks_alloc_lock();
4302 if (!fl)
4303 return NULL;
4304 fl->fl_lmops = &nfsd_lease_mng_ops;
4305 fl->fl_flags = FL_DELEG;
4306 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
4307 fl->fl_end = OFFSET_MAX;
4308 fl->fl_owner = (fl_owner_t)dp;
4309 fl->fl_pid = current->tgid;
4310 fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file;
4311 return fl;
4312}
4313
4314static struct nfs4_delegation *
4315nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
4316 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
4317{
4318 int status = 0;
4319 struct nfs4_delegation *dp;
4320 struct file *filp;
4321 struct file_lock *fl;
4322
4323
4324
4325
4326
4327
4328 if (fp->fi_had_conflict)
4329 return ERR_PTR(-EAGAIN);
4330
4331 filp = find_readable_file(fp);
4332 if (!filp) {
4333
4334 WARN_ON_ONCE(1);
4335 return ERR_PTR(-EBADF);
4336 }
4337 spin_lock(&state_lock);
4338 spin_lock(&fp->fi_lock);
4339 if (nfs4_delegation_exists(clp, fp))
4340 status = -EAGAIN;
4341 else if (!fp->fi_deleg_file) {
4342 fp->fi_deleg_file = filp;
4343
4344
4345 fp->fi_delegees = 1;
4346 filp = NULL;
4347 } else
4348 fp->fi_delegees++;
4349 spin_unlock(&fp->fi_lock);
4350 spin_unlock(&state_lock);
4351 if (filp)
4352 fput(filp);
4353 if (status)
4354 return ERR_PTR(status);
4355
4356 status = -ENOMEM;
4357 dp = alloc_init_deleg(clp, fp, fh, odstate);
4358 if (!dp)
4359 goto out_delegees;
4360
4361 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
4362 if (!fl)
4363 goto out_stid;
4364
4365 status = vfs_setlease(fp->fi_deleg_file, fl->fl_type, &fl, NULL);
4366 if (fl)
4367 locks_free_lock(fl);
4368 if (status)
4369 goto out_clnt_odstate;
4370
4371 spin_lock(&state_lock);
4372 spin_lock(&fp->fi_lock);
4373 if (fp->fi_had_conflict)
4374 status = -EAGAIN;
4375 else
4376 status = hash_delegation_locked(dp, fp);
4377 spin_unlock(&fp->fi_lock);
4378 spin_unlock(&state_lock);
4379
4380 if (status)
4381 destroy_unhashed_deleg(dp);
4382 return dp;
4383out_clnt_odstate:
4384 put_clnt_odstate(dp->dl_clnt_odstate);
4385out_stid:
4386 nfs4_put_stid(&dp->dl_stid);
4387out_delegees:
4388 put_deleg_file(fp);
4389 return ERR_PTR(status);
4390}
4391
4392static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
4393{
4394 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4395 if (status == -EAGAIN)
4396 open->op_why_no_deleg = WND4_CONTENTION;
4397 else {
4398 open->op_why_no_deleg = WND4_RESOURCE;
4399 switch (open->op_deleg_want) {
4400 case NFS4_SHARE_WANT_READ_DELEG:
4401 case NFS4_SHARE_WANT_WRITE_DELEG:
4402 case NFS4_SHARE_WANT_ANY_DELEG:
4403 break;
4404 case NFS4_SHARE_WANT_CANCEL:
4405 open->op_why_no_deleg = WND4_CANCELLED;
4406 break;
4407 case NFS4_SHARE_WANT_NO_DELEG:
4408 WARN_ON_ONCE(1);
4409 }
4410 }
4411}
4412
4413
4414
4415
4416
4417
4418
4419static void
4420nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
4421 struct nfs4_ol_stateid *stp)
4422{
4423 struct nfs4_delegation *dp;
4424 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
4425 struct nfs4_client *clp = stp->st_stid.sc_client;
4426 int cb_up;
4427 int status = 0;
4428
4429 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
4430 open->op_recall = 0;
4431 switch (open->op_claim_type) {
4432 case NFS4_OPEN_CLAIM_PREVIOUS:
4433 if (!cb_up)
4434 open->op_recall = 1;
4435 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
4436 goto out_no_deleg;
4437 break;
4438 case NFS4_OPEN_CLAIM_NULL:
4439 case NFS4_OPEN_CLAIM_FH:
4440
4441
4442
4443
4444
4445 if (locks_in_grace(clp->net))
4446 goto out_no_deleg;
4447 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
4448 goto out_no_deleg;
4449
4450
4451
4452
4453
4454
4455
4456 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
4457 goto out_no_deleg;
4458 if (open->op_create == NFS4_OPEN_CREATE)
4459 goto out_no_deleg;
4460 break;
4461 default:
4462 goto out_no_deleg;
4463 }
4464 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
4465 if (IS_ERR(dp))
4466 goto out_no_deleg;
4467
4468 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
4469
4470 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
4471 STATEID_VAL(&dp->dl_stid.sc_stateid));
4472 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
4473 nfs4_put_stid(&dp->dl_stid);
4474 return;
4475out_no_deleg:
4476 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
4477 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
4478 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
4479 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4480 open->op_recall = 1;
4481 }
4482
4483
4484 if (open->op_deleg_want)
4485 nfsd4_open_deleg_none_ext(open, status);
4486 return;
4487}
4488
4489static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
4490 struct nfs4_delegation *dp)
4491{
4492 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
4493 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4494 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4495 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
4496 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
4497 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4498 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4499 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
4500 }
4501
4502
4503
4504
4505}
4506
4507__be32
4508nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
4509{
4510 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4511 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
4512 struct nfs4_file *fp = NULL;
4513 struct nfs4_ol_stateid *stp = NULL;
4514 struct nfs4_delegation *dp = NULL;
4515 __be32 status;
4516 bool new_stp = false;
4517
4518
4519
4520
4521
4522
4523 fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle);
4524 if (fp != open->op_file) {
4525 status = nfs4_check_deleg(cl, open, &dp);
4526 if (status)
4527 goto out;
4528 stp = nfsd4_find_and_lock_existing_open(fp, open);
4529 } else {
4530 open->op_file = NULL;
4531 status = nfserr_bad_stateid;
4532 if (nfsd4_is_deleg_cur(open))
4533 goto out;
4534 }
4535
4536 if (!stp) {
4537 stp = init_open_stateid(fp, open);
4538 if (!open->op_stp)
4539 new_stp = true;
4540 }
4541
4542
4543
4544
4545
4546
4547
4548 if (!new_stp) {
4549
4550 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
4551 if (status) {
4552 mutex_unlock(&stp->st_mutex);
4553 goto out;
4554 }
4555 } else {
4556 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
4557 if (status) {
4558 stp->st_stid.sc_type = NFS4_CLOSED_STID;
4559 release_open_stateid(stp);
4560 mutex_unlock(&stp->st_mutex);
4561 goto out;
4562 }
4563
4564 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
4565 open->op_odstate);
4566 if (stp->st_clnt_odstate == open->op_odstate)
4567 open->op_odstate = NULL;
4568 }
4569
4570 nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
4571 mutex_unlock(&stp->st_mutex);
4572
4573 if (nfsd4_has_session(&resp->cstate)) {
4574 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
4575 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4576 open->op_why_no_deleg = WND4_NOT_WANTED;
4577 goto nodeleg;
4578 }
4579 }
4580
4581
4582
4583
4584
4585 nfs4_open_delegation(current_fh, open, stp);
4586nodeleg:
4587 status = nfs_ok;
4588
4589 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
4590 STATEID_VAL(&stp->st_stid.sc_stateid));
4591out:
4592
4593 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
4594 open->op_deleg_want)
4595 nfsd4_deleg_xgrade_none_ext(open, dp);
4596
4597 if (fp)
4598 put_nfs4_file(fp);
4599 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
4600 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4601
4602
4603
4604 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
4605 if (nfsd4_has_session(&resp->cstate))
4606 open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;
4607 else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))
4608 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
4609
4610 if (dp)
4611 nfs4_put_stid(&dp->dl_stid);
4612 if (stp)
4613 nfs4_put_stid(&stp->st_stid);
4614
4615 return status;
4616}
4617
4618void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
4619 struct nfsd4_open *open)
4620{
4621 if (open->op_openowner) {
4622 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
4623
4624 nfsd4_cstate_assign_replay(cstate, so);
4625 nfs4_put_stateowner(so);
4626 }
4627 if (open->op_file)
4628 kmem_cache_free(file_slab, open->op_file);
4629 if (open->op_stp)
4630 nfs4_put_stid(&open->op_stp->st_stid);
4631 if (open->op_odstate)
4632 kmem_cache_free(odstate_slab, open->op_odstate);
4633}
4634
4635__be32
4636nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4637 union nfsd4_op_u *u)
4638{
4639 clientid_t *clid = &u->renew;
4640 struct nfs4_client *clp;
4641 __be32 status;
4642 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4643
4644 dprintk("process_renew(%08x/%08x): starting\n",
4645 clid->cl_boot, clid->cl_id);
4646 status = lookup_clientid(clid, cstate, nn);
4647 if (status)
4648 goto out;
4649 clp = cstate->clp;
4650 status = nfserr_cb_path_down;
4651 if (!list_empty(&clp->cl_delegations)
4652 && clp->cl_cb_state != NFSD4_CB_UP)
4653 goto out;
4654 status = nfs_ok;
4655out:
4656 return status;
4657}
4658
4659void
4660nfsd4_end_grace(struct nfsd_net *nn)
4661{
4662
4663 if (nn->grace_ended)
4664 return;
4665
4666 dprintk("NFSD: end of grace period\n");
4667 nn->grace_ended = true;
4668
4669
4670
4671
4672
4673
4674 nfsd4_record_grace_done(nn);
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684 locks_end_grace(&nn->nfsd4_manager);
4685
4686
4687
4688
4689
4690}
4691
4692static time_t
4693nfs4_laundromat(struct nfsd_net *nn)
4694{
4695 struct nfs4_client *clp;
4696 struct nfs4_openowner *oo;
4697 struct nfs4_delegation *dp;
4698 struct nfs4_ol_stateid *stp;
4699 struct nfsd4_blocked_lock *nbl;
4700 struct list_head *pos, *next, reaplist;
4701 time_t cutoff = get_seconds() - nn->nfsd4_lease;
4702 time_t t, new_timeo = nn->nfsd4_lease;
4703
4704 dprintk("NFSD: laundromat service - starting\n");
4705 nfsd4_end_grace(nn);
4706 INIT_LIST_HEAD(&reaplist);
4707 spin_lock(&nn->client_lock);
4708 list_for_each_safe(pos, next, &nn->client_lru) {
4709 clp = list_entry(pos, struct nfs4_client, cl_lru);
4710 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
4711 t = clp->cl_time - cutoff;
4712 new_timeo = min(new_timeo, t);
4713 break;
4714 }
4715 if (mark_client_expired_locked(clp)) {
4716 dprintk("NFSD: client in use (clientid %08x)\n",
4717 clp->cl_clientid.cl_id);
4718 continue;
4719 }
4720 list_add(&clp->cl_lru, &reaplist);
4721 }
4722 spin_unlock(&nn->client_lock);
4723 list_for_each_safe(pos, next, &reaplist) {
4724 clp = list_entry(pos, struct nfs4_client, cl_lru);
4725 dprintk("NFSD: purging unused client (clientid %08x)\n",
4726 clp->cl_clientid.cl_id);
4727 list_del_init(&clp->cl_lru);
4728 expire_client(clp);
4729 }
4730 spin_lock(&state_lock);
4731 list_for_each_safe(pos, next, &nn->del_recall_lru) {
4732 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4733 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
4734 t = dp->dl_time - cutoff;
4735 new_timeo = min(new_timeo, t);
4736 break;
4737 }
4738 WARN_ON(!unhash_delegation_locked(dp));
4739 list_add(&dp->dl_recall_lru, &reaplist);
4740 }
4741 spin_unlock(&state_lock);
4742 while (!list_empty(&reaplist)) {
4743 dp = list_first_entry(&reaplist, struct nfs4_delegation,
4744 dl_recall_lru);
4745 list_del_init(&dp->dl_recall_lru);
4746 revoke_delegation(dp);
4747 }
4748
4749 spin_lock(&nn->client_lock);
4750 while (!list_empty(&nn->close_lru)) {
4751 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
4752 oo_close_lru);
4753 if (time_after((unsigned long)oo->oo_time,
4754 (unsigned long)cutoff)) {
4755 t = oo->oo_time - cutoff;
4756 new_timeo = min(new_timeo, t);
4757 break;
4758 }
4759 list_del_init(&oo->oo_close_lru);
4760 stp = oo->oo_last_closed_stid;
4761 oo->oo_last_closed_stid = NULL;
4762 spin_unlock(&nn->client_lock);
4763 nfs4_put_stid(&stp->st_stid);
4764 spin_lock(&nn->client_lock);
4765 }
4766 spin_unlock(&nn->client_lock);
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779 BUG_ON(!list_empty(&reaplist));
4780 spin_lock(&nn->blocked_locks_lock);
4781 while (!list_empty(&nn->blocked_locks_lru)) {
4782 nbl = list_first_entry(&nn->blocked_locks_lru,
4783 struct nfsd4_blocked_lock, nbl_lru);
4784 if (time_after((unsigned long)nbl->nbl_time,
4785 (unsigned long)cutoff)) {
4786 t = nbl->nbl_time - cutoff;
4787 new_timeo = min(new_timeo, t);
4788 break;
4789 }
4790 list_move(&nbl->nbl_lru, &reaplist);
4791 list_del_init(&nbl->nbl_list);
4792 }
4793 spin_unlock(&nn->blocked_locks_lock);
4794
4795 while (!list_empty(&reaplist)) {
4796 nbl = list_first_entry(&reaplist,
4797 struct nfsd4_blocked_lock, nbl_lru);
4798 list_del_init(&nbl->nbl_lru);
4799 posix_unblock_lock(&nbl->nbl_lock);
4800 free_blocked_lock(nbl);
4801 }
4802
4803 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
4804 return new_timeo;
4805}
4806
4807static struct workqueue_struct *laundry_wq;
4808static void laundromat_main(struct work_struct *);
4809
4810static void
4811laundromat_main(struct work_struct *laundry)
4812{
4813 time_t t;
4814 struct delayed_work *dwork = to_delayed_work(laundry);
4815 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
4816 laundromat_work);
4817
4818 t = nfs4_laundromat(nn);
4819 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
4820 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
4821}
4822
4823static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
4824{
4825 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
4826 return nfserr_bad_stateid;
4827 return nfs_ok;
4828}
4829
4830static inline int
4831access_permit_read(struct nfs4_ol_stateid *stp)
4832{
4833 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
4834 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
4835 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
4836}
4837
4838static inline int
4839access_permit_write(struct nfs4_ol_stateid *stp)
4840{
4841 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
4842 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
4843}
4844
4845static
4846__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
4847{
4848 __be32 status = nfserr_openmode;
4849
4850
4851 if (stp->st_openstp)
4852 stp = stp->st_openstp;
4853 if ((flags & WR_STATE) && !access_permit_write(stp))
4854 goto out;
4855 if ((flags & RD_STATE) && !access_permit_read(stp))
4856 goto out;
4857 status = nfs_ok;
4858out:
4859 return status;
4860}
4861
4862static inline __be32
4863check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
4864{
4865 if (ONE_STATEID(stateid) && (flags & RD_STATE))
4866 return nfs_ok;
4867 else if (opens_in_grace(net)) {
4868
4869
4870 return nfserr_grace;
4871 } else if (flags & WR_STATE)
4872 return nfs4_share_conflict(current_fh,
4873 NFS4_SHARE_DENY_WRITE);
4874 else
4875 return nfs4_share_conflict(current_fh,
4876 NFS4_SHARE_DENY_READ);
4877}
4878
4879
4880
4881
4882
4883static inline int
4884grace_disallows_io(struct net *net, struct inode *inode)
4885{
4886 return opens_in_grace(net) && mandatory_lock(inode);
4887}
4888
4889static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
4890{
4891
4892
4893
4894
4895 if (has_session && in->si_generation == 0)
4896 return nfs_ok;
4897
4898 if (in->si_generation == ref->si_generation)
4899 return nfs_ok;
4900
4901
4902 if (nfsd4_stateid_generation_after(in, ref))
4903 return nfserr_bad_stateid;
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914 return nfserr_old_stateid;
4915}
4916
4917static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session)
4918{
4919 __be32 ret;
4920
4921 spin_lock(&s->sc_lock);
4922 ret = nfsd4_verify_open_stid(s);
4923 if (ret == nfs_ok)
4924 ret = check_stateid_generation(in, &s->sc_stateid, has_session);
4925 spin_unlock(&s->sc_lock);
4926 return ret;
4927}
4928
4929static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
4930{
4931 if (ols->st_stateowner->so_is_open_owner &&
4932 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4933 return nfserr_bad_stateid;
4934 return nfs_ok;
4935}
4936
4937static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
4938{
4939 struct nfs4_stid *s;
4940 __be32 status = nfserr_bad_stateid;
4941
4942 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
4943 CLOSE_STATEID(stateid))
4944 return status;
4945
4946 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
4947 char addr_str[INET6_ADDRSTRLEN];
4948 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
4949 sizeof(addr_str));
4950 pr_warn_ratelimited("NFSD: client %s testing state ID "
4951 "with incorrect client ID\n", addr_str);
4952 return status;
4953 }
4954 spin_lock(&cl->cl_lock);
4955 s = find_stateid_locked(cl, stateid);
4956 if (!s)
4957 goto out_unlock;
4958 status = nfsd4_stid_check_stateid_generation(stateid, s, 1);
4959 if (status)
4960 goto out_unlock;
4961 switch (s->sc_type) {
4962 case NFS4_DELEG_STID:
4963 status = nfs_ok;
4964 break;
4965 case NFS4_REVOKED_DELEG_STID:
4966 status = nfserr_deleg_revoked;
4967 break;
4968 case NFS4_OPEN_STID:
4969 case NFS4_LOCK_STID:
4970 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
4971 break;
4972 default:
4973 printk("unknown stateid type %x\n", s->sc_type);
4974
4975 case NFS4_CLOSED_STID:
4976 case NFS4_CLOSED_DELEG_STID:
4977 status = nfserr_bad_stateid;
4978 }
4979out_unlock:
4980 spin_unlock(&cl->cl_lock);
4981 return status;
4982}
4983
4984__be32
4985nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
4986 stateid_t *stateid, unsigned char typemask,
4987 struct nfs4_stid **s, struct nfsd_net *nn)
4988{
4989 __be32 status;
4990 bool return_revoked = false;
4991
4992
4993
4994
4995
4996 if (typemask & NFS4_REVOKED_DELEG_STID)
4997 return_revoked = true;
4998 else if (typemask & NFS4_DELEG_STID)
4999 typemask |= NFS4_REVOKED_DELEG_STID;
5000
5001 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
5002 CLOSE_STATEID(stateid))
5003 return nfserr_bad_stateid;
5004 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
5005 if (status == nfserr_stale_clientid) {
5006 if (cstate->session)
5007 return nfserr_bad_stateid;
5008 return nfserr_stale_stateid;
5009 }
5010 if (status)
5011 return status;
5012 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
5013 if (!*s)
5014 return nfserr_bad_stateid;
5015 if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
5016 nfs4_put_stid(*s);
5017 if (cstate->minorversion)
5018 return nfserr_deleg_revoked;
5019 return nfserr_bad_stateid;
5020 }
5021 return nfs_ok;
5022}
5023
5024static struct file *
5025nfs4_find_file(struct nfs4_stid *s, int flags)
5026{
5027 if (!s)
5028 return NULL;
5029
5030 switch (s->sc_type) {
5031 case NFS4_DELEG_STID:
5032 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
5033 return NULL;
5034 return get_file(s->sc_file->fi_deleg_file);
5035 case NFS4_OPEN_STID:
5036 case NFS4_LOCK_STID:
5037 if (flags & RD_STATE)
5038 return find_readable_file(s->sc_file);
5039 else
5040 return find_writeable_file(s->sc_file);
5041 break;
5042 }
5043
5044 return NULL;
5045}
5046
5047static __be32
5048nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags)
5049{
5050 __be32 status;
5051
5052 status = nfsd4_check_openowner_confirmed(ols);
5053 if (status)
5054 return status;
5055 return nfs4_check_openmode(ols, flags);
5056}
5057
5058static __be32
5059nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
5060 struct file **filpp, bool *tmp_file, int flags)
5061{
5062 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
5063 struct file *file;
5064 __be32 status;
5065
5066 file = nfs4_find_file(s, flags);
5067 if (file) {
5068 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
5069 acc | NFSD_MAY_OWNER_OVERRIDE);
5070 if (status) {
5071 fput(file);
5072 return status;
5073 }
5074
5075 *filpp = file;
5076 } else {
5077 status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp);
5078 if (status)
5079 return status;
5080
5081 if (tmp_file)
5082 *tmp_file = true;
5083 }
5084
5085 return 0;
5086}
5087
5088
5089
5090
5091__be32
5092nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
5093 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
5094 stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file)
5095{
5096 struct inode *ino = d_inode(fhp->fh_dentry);
5097 struct net *net = SVC_NET(rqstp);
5098 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5099 struct nfs4_stid *s = NULL;
5100 __be32 status;
5101
5102 if (filpp)
5103 *filpp = NULL;
5104 if (tmp_file)
5105 *tmp_file = false;
5106
5107 if (grace_disallows_io(net, ino))
5108 return nfserr_grace;
5109
5110 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
5111 status = check_special_stateids(net, fhp, stateid, flags);
5112 goto done;
5113 }
5114
5115 status = nfsd4_lookup_stateid(cstate, stateid,
5116 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
5117 &s, nn);
5118 if (status)
5119 return status;
5120 status = nfsd4_stid_check_stateid_generation(stateid, s,
5121 nfsd4_has_session(cstate));
5122 if (status)
5123 goto out;
5124
5125 switch (s->sc_type) {
5126 case NFS4_DELEG_STID:
5127 status = nfs4_check_delegmode(delegstateid(s), flags);
5128 break;
5129 case NFS4_OPEN_STID:
5130 case NFS4_LOCK_STID:
5131 status = nfs4_check_olstateid(fhp, openlockstateid(s), flags);
5132 break;
5133 default:
5134 status = nfserr_bad_stateid;
5135 break;
5136 }
5137 if (status)
5138 goto out;
5139 status = nfs4_check_fh(fhp, s);
5140
5141done:
5142 if (!status && filpp)
5143 status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
5144out:
5145 if (s)
5146 nfs4_put_stid(s);
5147 return status;
5148}
5149
5150
5151
5152
5153__be32
5154nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5155 union nfsd4_op_u *u)
5156{
5157 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
5158 struct nfsd4_test_stateid_id *stateid;
5159 struct nfs4_client *cl = cstate->session->se_client;
5160
5161 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
5162 stateid->ts_id_status =
5163 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
5164
5165 return nfs_ok;
5166}
5167
5168static __be32
5169nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
5170{
5171 struct nfs4_ol_stateid *stp = openlockstateid(s);
5172 __be32 ret;
5173
5174 ret = nfsd4_lock_ol_stateid(stp);
5175 if (ret)
5176 goto out_put_stid;
5177
5178 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5179 if (ret)
5180 goto out;
5181
5182 ret = nfserr_locks_held;
5183 if (check_for_locks(stp->st_stid.sc_file,
5184 lockowner(stp->st_stateowner)))
5185 goto out;
5186
5187 release_lock_stateid(stp);
5188 ret = nfs_ok;
5189
5190out:
5191 mutex_unlock(&stp->st_mutex);
5192out_put_stid:
5193 nfs4_put_stid(s);
5194 return ret;
5195}
5196
5197__be32
5198nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5199 union nfsd4_op_u *u)
5200{
5201 struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
5202 stateid_t *stateid = &free_stateid->fr_stateid;
5203 struct nfs4_stid *s;
5204 struct nfs4_delegation *dp;
5205 struct nfs4_client *cl = cstate->session->se_client;
5206 __be32 ret = nfserr_bad_stateid;
5207
5208 spin_lock(&cl->cl_lock);
5209 s = find_stateid_locked(cl, stateid);
5210 if (!s)
5211 goto out_unlock;
5212 spin_lock(&s->sc_lock);
5213 switch (s->sc_type) {
5214 case NFS4_DELEG_STID:
5215 ret = nfserr_locks_held;
5216 break;
5217 case NFS4_OPEN_STID:
5218 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5219 if (ret)
5220 break;
5221 ret = nfserr_locks_held;
5222 break;
5223 case NFS4_LOCK_STID:
5224 spin_unlock(&s->sc_lock);
5225 refcount_inc(&s->sc_count);
5226 spin_unlock(&cl->cl_lock);
5227 ret = nfsd4_free_lock_stateid(stateid, s);
5228 goto out;
5229 case NFS4_REVOKED_DELEG_STID:
5230 spin_unlock(&s->sc_lock);
5231 dp = delegstateid(s);
5232 list_del_init(&dp->dl_recall_lru);
5233 spin_unlock(&cl->cl_lock);
5234 nfs4_put_stid(s);
5235 ret = nfs_ok;
5236 goto out;
5237
5238 }
5239 spin_unlock(&s->sc_lock);
5240out_unlock:
5241 spin_unlock(&cl->cl_lock);
5242out:
5243 return ret;
5244}
5245
5246static inline int
5247setlkflg (int type)
5248{
5249 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
5250 RD_STATE : WR_STATE;
5251}
5252
5253static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
5254{
5255 struct svc_fh *current_fh = &cstate->current_fh;
5256 struct nfs4_stateowner *sop = stp->st_stateowner;
5257 __be32 status;
5258
5259 status = nfsd4_check_seqid(cstate, sop, seqid);
5260 if (status)
5261 return status;
5262 status = nfsd4_lock_ol_stateid(stp);
5263 if (status != nfs_ok)
5264 return status;
5265 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
5266 if (status == nfs_ok)
5267 status = nfs4_check_fh(current_fh, &stp->st_stid);
5268 if (status != nfs_ok)
5269 mutex_unlock(&stp->st_mutex);
5270 return status;
5271}
5272
5273
5274
5275
5276static __be32
5277nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5278 stateid_t *stateid, char typemask,
5279 struct nfs4_ol_stateid **stpp,
5280 struct nfsd_net *nn)
5281{
5282 __be32 status;
5283 struct nfs4_stid *s;
5284 struct nfs4_ol_stateid *stp = NULL;
5285
5286 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
5287 seqid, STATEID_VAL(stateid));
5288
5289 *stpp = NULL;
5290 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
5291 if (status)
5292 return status;
5293 stp = openlockstateid(s);
5294 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
5295
5296 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
5297 if (!status)
5298 *stpp = stp;
5299 else
5300 nfs4_put_stid(&stp->st_stid);
5301 return status;
5302}
5303
5304static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5305 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
5306{
5307 __be32 status;
5308 struct nfs4_openowner *oo;
5309 struct nfs4_ol_stateid *stp;
5310
5311 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
5312 NFS4_OPEN_STID, &stp, nn);
5313 if (status)
5314 return status;
5315 oo = openowner(stp->st_stateowner);
5316 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
5317 mutex_unlock(&stp->st_mutex);
5318 nfs4_put_stid(&stp->st_stid);
5319 return nfserr_bad_stateid;
5320 }
5321 *stpp = stp;
5322 return nfs_ok;
5323}
5324
5325__be32
5326nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5327 union nfsd4_op_u *u)
5328{
5329 struct nfsd4_open_confirm *oc = &u->open_confirm;
5330 __be32 status;
5331 struct nfs4_openowner *oo;
5332 struct nfs4_ol_stateid *stp;
5333 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5334
5335 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5336 cstate->current_fh.fh_dentry);
5337
5338 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
5339 if (status)
5340 return status;
5341
5342 status = nfs4_preprocess_seqid_op(cstate,
5343 oc->oc_seqid, &oc->oc_req_stateid,
5344 NFS4_OPEN_STID, &stp, nn);
5345 if (status)
5346 goto out;
5347 oo = openowner(stp->st_stateowner);
5348 status = nfserr_bad_stateid;
5349 if (oo->oo_flags & NFS4_OO_CONFIRMED) {
5350 mutex_unlock(&stp->st_mutex);
5351 goto put_stateid;
5352 }
5353 oo->oo_flags |= NFS4_OO_CONFIRMED;
5354 nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
5355 mutex_unlock(&stp->st_mutex);
5356 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
5357 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
5358
5359 nfsd4_client_record_create(oo->oo_owner.so_client);
5360 status = nfs_ok;
5361put_stateid:
5362 nfs4_put_stid(&stp->st_stid);
5363out:
5364 nfsd4_bump_seqid(cstate, status);
5365 return status;
5366}
5367
5368static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
5369{
5370 if (!test_access(access, stp))
5371 return;
5372 nfs4_file_put_access(stp->st_stid.sc_file, access);
5373 clear_access(access, stp);
5374}
5375
5376static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
5377{
5378 switch (to_access) {
5379 case NFS4_SHARE_ACCESS_READ:
5380 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
5381 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5382 break;
5383 case NFS4_SHARE_ACCESS_WRITE:
5384 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
5385 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5386 break;
5387 case NFS4_SHARE_ACCESS_BOTH:
5388 break;
5389 default:
5390 WARN_ON_ONCE(1);
5391 }
5392}
5393
5394__be32
5395nfsd4_open_downgrade(struct svc_rqst *rqstp,
5396 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
5397{
5398 struct nfsd4_open_downgrade *od = &u->open_downgrade;
5399 __be32 status;
5400 struct nfs4_ol_stateid *stp;
5401 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5402
5403 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5404 cstate->current_fh.fh_dentry);
5405
5406
5407 if (od->od_deleg_want)
5408 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
5409 od->od_deleg_want);
5410
5411 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
5412 &od->od_stateid, &stp, nn);
5413 if (status)
5414 goto out;
5415 status = nfserr_inval;
5416 if (!test_access(od->od_share_access, stp)) {
5417 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5418 stp->st_access_bmap, od->od_share_access);
5419 goto put_stateid;
5420 }
5421 if (!test_deny(od->od_share_deny, stp)) {
5422 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5423 stp->st_deny_bmap, od->od_share_deny);
5424 goto put_stateid;
5425 }
5426 nfs4_stateid_downgrade(stp, od->od_share_access);
5427 reset_union_bmap_deny(od->od_share_deny, stp);
5428 nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
5429 status = nfs_ok;
5430put_stateid:
5431 mutex_unlock(&stp->st_mutex);
5432 nfs4_put_stid(&stp->st_stid);
5433out:
5434 nfsd4_bump_seqid(cstate, status);
5435 return status;
5436}
5437
5438static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
5439{
5440 struct nfs4_client *clp = s->st_stid.sc_client;
5441 bool unhashed;
5442 LIST_HEAD(reaplist);
5443
5444 spin_lock(&clp->cl_lock);
5445 unhashed = unhash_open_stateid(s, &reaplist);
5446
5447 if (clp->cl_minorversion) {
5448 if (unhashed)
5449 put_ol_stateid_locked(s, &reaplist);
5450 spin_unlock(&clp->cl_lock);
5451 free_ol_stateid_reaplist(&reaplist);
5452 } else {
5453 spin_unlock(&clp->cl_lock);
5454 free_ol_stateid_reaplist(&reaplist);
5455 if (unhashed)
5456 move_to_close_lru(s, clp->net);
5457 }
5458}
5459
5460
5461
5462
5463__be32
5464nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5465 union nfsd4_op_u *u)
5466{
5467 struct nfsd4_close *close = &u->close;
5468 __be32 status;
5469 struct nfs4_ol_stateid *stp;
5470 struct net *net = SVC_NET(rqstp);
5471 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5472
5473 dprintk("NFSD: nfsd4_close on file %pd\n",
5474 cstate->current_fh.fh_dentry);
5475
5476 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
5477 &close->cl_stateid,
5478 NFS4_OPEN_STID|NFS4_CLOSED_STID,
5479 &stp, nn);
5480 nfsd4_bump_seqid(cstate, status);
5481 if (status)
5482 goto out;
5483
5484 stp->st_stid.sc_type = NFS4_CLOSED_STID;
5485
5486
5487
5488
5489
5490
5491
5492 nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
5493
5494 nfsd4_close_open_stateid(stp);
5495 mutex_unlock(&stp->st_mutex);
5496
5497
5498
5499
5500
5501
5502
5503
5504 memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));
5505
5506
5507 nfs4_put_stid(&stp->st_stid);
5508out:
5509 return status;
5510}
5511
5512__be32
5513nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5514 union nfsd4_op_u *u)
5515{
5516 struct nfsd4_delegreturn *dr = &u->delegreturn;
5517 struct nfs4_delegation *dp;
5518 stateid_t *stateid = &dr->dr_stateid;
5519 struct nfs4_stid *s;
5520 __be32 status;
5521 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5522
5523 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
5524 return status;
5525
5526 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
5527 if (status)
5528 goto out;
5529 dp = delegstateid(s);
5530 status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));
5531 if (status)
5532 goto put_stateid;
5533
5534 destroy_delegation(dp);
5535put_stateid:
5536 nfs4_put_stid(&dp->dl_stid);
5537out:
5538 return status;
5539}
5540
5541static inline u64
5542end_offset(u64 start, u64 len)
5543{
5544 u64 end;
5545
5546 end = start + len;
5547 return end >= start ? end: NFS4_MAX_UINT64;
5548}
5549
5550
5551static inline u64
5552last_byte_offset(u64 start, u64 len)
5553{
5554 u64 end;
5555
5556 WARN_ON_ONCE(!len);
5557 end = start + len;
5558 return end > start ? end - 1: NFS4_MAX_UINT64;
5559}
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569static inline void
5570nfs4_transform_lock_offset(struct file_lock *lock)
5571{
5572 if (lock->fl_start < 0)
5573 lock->fl_start = OFFSET_MAX;
5574 if (lock->fl_end < 0)
5575 lock->fl_end = OFFSET_MAX;
5576}
5577
5578static fl_owner_t
5579nfsd4_fl_get_owner(fl_owner_t owner)
5580{
5581 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5582
5583 nfs4_get_stateowner(&lo->lo_owner);
5584 return owner;
5585}
5586
5587static void
5588nfsd4_fl_put_owner(fl_owner_t owner)
5589{
5590 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5591
5592 if (lo)
5593 nfs4_put_stateowner(&lo->lo_owner);
5594}
5595
5596static void
5597nfsd4_lm_notify(struct file_lock *fl)
5598{
5599 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner;
5600 struct net *net = lo->lo_owner.so_client->net;
5601 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5602 struct nfsd4_blocked_lock *nbl = container_of(fl,
5603 struct nfsd4_blocked_lock, nbl_lock);
5604 bool queue = false;
5605
5606
5607 spin_lock(&nn->blocked_locks_lock);
5608 if (!list_empty(&nbl->nbl_list)) {
5609 list_del_init(&nbl->nbl_list);
5610 list_del_init(&nbl->nbl_lru);
5611 queue = true;
5612 }
5613 spin_unlock(&nn->blocked_locks_lock);
5614
5615 if (queue)
5616 nfsd4_run_cb(&nbl->nbl_cb);
5617}
5618
5619static const struct lock_manager_operations nfsd_posix_mng_ops = {
5620 .lm_notify = nfsd4_lm_notify,
5621 .lm_get_owner = nfsd4_fl_get_owner,
5622 .lm_put_owner = nfsd4_fl_put_owner,
5623};
5624
5625static inline void
5626nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
5627{
5628 struct nfs4_lockowner *lo;
5629
5630 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
5631 lo = (struct nfs4_lockowner *) fl->fl_owner;
5632 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
5633 lo->lo_owner.so_owner.len, GFP_KERNEL);
5634 if (!deny->ld_owner.data)
5635
5636 goto nevermind;
5637 deny->ld_owner.len = lo->lo_owner.so_owner.len;
5638 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
5639 } else {
5640nevermind:
5641 deny->ld_owner.len = 0;
5642 deny->ld_owner.data = NULL;
5643 deny->ld_clientid.cl_boot = 0;
5644 deny->ld_clientid.cl_id = 0;
5645 }
5646 deny->ld_start = fl->fl_start;
5647 deny->ld_length = NFS4_MAX_UINT64;
5648 if (fl->fl_end != NFS4_MAX_UINT64)
5649 deny->ld_length = fl->fl_end - fl->fl_start + 1;
5650 deny->ld_type = NFS4_READ_LT;
5651 if (fl->fl_type != F_RDLCK)
5652 deny->ld_type = NFS4_WRITE_LT;
5653}
5654
5655static struct nfs4_lockowner *
5656find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner)
5657{
5658 unsigned int strhashval = ownerstr_hashval(owner);
5659 struct nfs4_stateowner *so;
5660
5661 lockdep_assert_held(&clp->cl_lock);
5662
5663 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
5664 so_strhash) {
5665 if (so->so_is_open_owner)
5666 continue;
5667 if (same_owner_str(so, owner))
5668 return lockowner(nfs4_get_stateowner(so));
5669 }
5670 return NULL;
5671}
5672
5673static struct nfs4_lockowner *
5674find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner)
5675{
5676 struct nfs4_lockowner *lo;
5677
5678 spin_lock(&clp->cl_lock);
5679 lo = find_lockowner_str_locked(clp, owner);
5680 spin_unlock(&clp->cl_lock);
5681 return lo;
5682}
5683
5684static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
5685{
5686 unhash_lockowner_locked(lockowner(sop));
5687}
5688
5689static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
5690{
5691 struct nfs4_lockowner *lo = lockowner(sop);
5692
5693 kmem_cache_free(lockowner_slab, lo);
5694}
5695
5696static const struct nfs4_stateowner_operations lockowner_ops = {
5697 .so_unhash = nfs4_unhash_lockowner,
5698 .so_free = nfs4_free_lockowner,
5699};
5700
5701
5702
5703
5704
5705
5706
5707
5708static struct nfs4_lockowner *
5709alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
5710 struct nfs4_ol_stateid *open_stp,
5711 struct nfsd4_lock *lock)
5712{
5713 struct nfs4_lockowner *lo, *ret;
5714
5715 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
5716 if (!lo)
5717 return NULL;
5718 INIT_LIST_HEAD(&lo->lo_blocked);
5719 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
5720 lo->lo_owner.so_is_open_owner = 0;
5721 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
5722 lo->lo_owner.so_ops = &lockowner_ops;
5723 spin_lock(&clp->cl_lock);
5724 ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);
5725 if (ret == NULL) {
5726 list_add(&lo->lo_owner.so_strhash,
5727 &clp->cl_ownerstr_hashtbl[strhashval]);
5728 ret = lo;
5729 } else
5730 nfs4_free_stateowner(&lo->lo_owner);
5731
5732 spin_unlock(&clp->cl_lock);
5733 return ret;
5734}
5735
5736static struct nfs4_ol_stateid *
5737find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
5738{
5739 struct nfs4_ol_stateid *lst;
5740 struct nfs4_client *clp = lo->lo_owner.so_client;
5741
5742 lockdep_assert_held(&clp->cl_lock);
5743
5744 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
5745 if (lst->st_stid.sc_type != NFS4_LOCK_STID)
5746 continue;
5747 if (lst->st_stid.sc_file == fp) {
5748 refcount_inc(&lst->st_stid.sc_count);
5749 return lst;
5750 }
5751 }
5752 return NULL;
5753}
5754
5755static struct nfs4_ol_stateid *
5756init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
5757 struct nfs4_file *fp, struct inode *inode,
5758 struct nfs4_ol_stateid *open_stp)
5759{
5760 struct nfs4_client *clp = lo->lo_owner.so_client;
5761 struct nfs4_ol_stateid *retstp;
5762
5763 mutex_init(&stp->st_mutex);
5764 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
5765retry:
5766 spin_lock(&clp->cl_lock);
5767 spin_lock(&fp->fi_lock);
5768 retstp = find_lock_stateid(lo, fp);
5769 if (retstp)
5770 goto out_unlock;
5771
5772 refcount_inc(&stp->st_stid.sc_count);
5773 stp->st_stid.sc_type = NFS4_LOCK_STID;
5774 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
5775 get_nfs4_file(fp);
5776 stp->st_stid.sc_file = fp;
5777 stp->st_access_bmap = 0;
5778 stp->st_deny_bmap = open_stp->st_deny_bmap;
5779 stp->st_openstp = open_stp;
5780 list_add(&stp->st_locks, &open_stp->st_locks);
5781 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
5782 list_add(&stp->st_perfile, &fp->fi_stateids);
5783out_unlock:
5784 spin_unlock(&fp->fi_lock);
5785 spin_unlock(&clp->cl_lock);
5786 if (retstp) {
5787 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
5788 nfs4_put_stid(&retstp->st_stid);
5789 goto retry;
5790 }
5791
5792 mutex_unlock(&stp->st_mutex);
5793 stp = retstp;
5794 }
5795 return stp;
5796}
5797
5798static struct nfs4_ol_stateid *
5799find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
5800 struct inode *inode, struct nfs4_ol_stateid *ost,
5801 bool *new)
5802{
5803 struct nfs4_stid *ns = NULL;
5804 struct nfs4_ol_stateid *lst;
5805 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5806 struct nfs4_client *clp = oo->oo_owner.so_client;
5807
5808 *new = false;
5809 spin_lock(&clp->cl_lock);
5810 lst = find_lock_stateid(lo, fi);
5811 spin_unlock(&clp->cl_lock);
5812 if (lst != NULL) {
5813 if (nfsd4_lock_ol_stateid(lst) == nfs_ok)
5814 goto out;
5815 nfs4_put_stid(&lst->st_stid);
5816 }
5817 ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid);
5818 if (ns == NULL)
5819 return NULL;
5820
5821 lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost);
5822 if (lst == openlockstateid(ns))
5823 *new = true;
5824 else
5825 nfs4_put_stid(ns);
5826out:
5827 return lst;
5828}
5829
5830static int
5831check_lock_length(u64 offset, u64 length)
5832{
5833 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
5834 (length > ~offset)));
5835}
5836
5837static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
5838{
5839 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
5840
5841 lockdep_assert_held(&fp->fi_lock);
5842
5843 if (test_access(access, lock_stp))
5844 return;
5845 __nfs4_file_get_access(fp, access);
5846 set_access(access, lock_stp);
5847}
5848
5849static __be32
5850lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
5851 struct nfs4_ol_stateid *ost,
5852 struct nfsd4_lock *lock,
5853 struct nfs4_ol_stateid **plst, bool *new)
5854{
5855 __be32 status;
5856 struct nfs4_file *fi = ost->st_stid.sc_file;
5857 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5858 struct nfs4_client *cl = oo->oo_owner.so_client;
5859 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
5860 struct nfs4_lockowner *lo;
5861 struct nfs4_ol_stateid *lst;
5862 unsigned int strhashval;
5863
5864 lo = find_lockowner_str(cl, &lock->lk_new_owner);
5865 if (!lo) {
5866 strhashval = ownerstr_hashval(&lock->lk_new_owner);
5867 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
5868 if (lo == NULL)
5869 return nfserr_jukebox;
5870 } else {
5871
5872 status = nfserr_bad_seqid;
5873 if (!cstate->minorversion &&
5874 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
5875 goto out;
5876 }
5877
5878 lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
5879 if (lst == NULL) {
5880 status = nfserr_jukebox;
5881 goto out;
5882 }
5883
5884 status = nfs_ok;
5885 *plst = lst;
5886out:
5887 nfs4_put_stateowner(&lo->lo_owner);
5888 return status;
5889}
5890
5891
5892
5893
5894__be32
5895nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5896 union nfsd4_op_u *u)
5897{
5898 struct nfsd4_lock *lock = &u->lock;
5899 struct nfs4_openowner *open_sop = NULL;
5900 struct nfs4_lockowner *lock_sop = NULL;
5901 struct nfs4_ol_stateid *lock_stp = NULL;
5902 struct nfs4_ol_stateid *open_stp = NULL;
5903 struct nfs4_file *fp;
5904 struct file *filp = NULL;
5905 struct nfsd4_blocked_lock *nbl = NULL;
5906 struct file_lock *file_lock = NULL;
5907 struct file_lock *conflock = NULL;
5908 __be32 status = 0;
5909 int lkflg;
5910 int err;
5911 bool new = false;
5912 unsigned char fl_type;
5913 unsigned int fl_flags = FL_POSIX;
5914 struct net *net = SVC_NET(rqstp);
5915 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5916
5917 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5918 (long long) lock->lk_offset,
5919 (long long) lock->lk_length);
5920
5921 if (check_lock_length(lock->lk_offset, lock->lk_length))
5922 return nfserr_inval;
5923
5924 if ((status = fh_verify(rqstp, &cstate->current_fh,
5925 S_IFREG, NFSD_MAY_LOCK))) {
5926 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5927 return status;
5928 }
5929
5930 if (lock->lk_is_new) {
5931 if (nfsd4_has_session(cstate))
5932
5933 memcpy(&lock->lk_new_clientid,
5934 &cstate->session->se_client->cl_clientid,
5935 sizeof(clientid_t));
5936
5937 status = nfserr_stale_clientid;
5938 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
5939 goto out;
5940
5941
5942 status = nfs4_preprocess_confirmed_seqid_op(cstate,
5943 lock->lk_new_open_seqid,
5944 &lock->lk_new_open_stateid,
5945 &open_stp, nn);
5946 if (status)
5947 goto out;
5948 mutex_unlock(&open_stp->st_mutex);
5949 open_sop = openowner(open_stp->st_stateowner);
5950 status = nfserr_bad_stateid;
5951 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
5952 &lock->lk_new_clientid))
5953 goto out;
5954 status = lookup_or_create_lock_state(cstate, open_stp, lock,
5955 &lock_stp, &new);
5956 } else {
5957 status = nfs4_preprocess_seqid_op(cstate,
5958 lock->lk_old_lock_seqid,
5959 &lock->lk_old_lock_stateid,
5960 NFS4_LOCK_STID, &lock_stp, nn);
5961 }
5962 if (status)
5963 goto out;
5964 lock_sop = lockowner(lock_stp->st_stateowner);
5965
5966 lkflg = setlkflg(lock->lk_type);
5967 status = nfs4_check_openmode(lock_stp, lkflg);
5968 if (status)
5969 goto out;
5970
5971 status = nfserr_grace;
5972 if (locks_in_grace(net) && !lock->lk_reclaim)
5973 goto out;
5974 status = nfserr_no_grace;
5975 if (!locks_in_grace(net) && lock->lk_reclaim)
5976 goto out;
5977
5978 fp = lock_stp->st_stid.sc_file;
5979 switch (lock->lk_type) {
5980 case NFS4_READW_LT:
5981 if (nfsd4_has_session(cstate))
5982 fl_flags |= FL_SLEEP;
5983
5984 case NFS4_READ_LT:
5985 spin_lock(&fp->fi_lock);
5986 filp = find_readable_file_locked(fp);
5987 if (filp)
5988 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
5989 spin_unlock(&fp->fi_lock);
5990 fl_type = F_RDLCK;
5991 break;
5992 case NFS4_WRITEW_LT:
5993 if (nfsd4_has_session(cstate))
5994 fl_flags |= FL_SLEEP;
5995
5996 case NFS4_WRITE_LT:
5997 spin_lock(&fp->fi_lock);
5998 filp = find_writeable_file_locked(fp);
5999 if (filp)
6000 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
6001 spin_unlock(&fp->fi_lock);
6002 fl_type = F_WRLCK;
6003 break;
6004 default:
6005 status = nfserr_inval;
6006 goto out;
6007 }
6008
6009 if (!filp) {
6010 status = nfserr_openmode;
6011 goto out;
6012 }
6013
6014 nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
6015 if (!nbl) {
6016 dprintk("NFSD: %s: unable to allocate block!\n", __func__);
6017 status = nfserr_jukebox;
6018 goto out;
6019 }
6020
6021 file_lock = &nbl->nbl_lock;
6022 file_lock->fl_type = fl_type;
6023 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
6024 file_lock->fl_pid = current->tgid;
6025 file_lock->fl_file = filp;
6026 file_lock->fl_flags = fl_flags;
6027 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6028 file_lock->fl_start = lock->lk_offset;
6029 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
6030 nfs4_transform_lock_offset(file_lock);
6031
6032 conflock = locks_alloc_lock();
6033 if (!conflock) {
6034 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6035 status = nfserr_jukebox;
6036 goto out;
6037 }
6038
6039 if (fl_flags & FL_SLEEP) {
6040 nbl->nbl_time = jiffies;
6041 spin_lock(&nn->blocked_locks_lock);
6042 list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
6043 list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
6044 spin_unlock(&nn->blocked_locks_lock);
6045 }
6046
6047 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
6048 switch (err) {
6049 case 0:
6050 nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);
6051 status = 0;
6052 break;
6053 case FILE_LOCK_DEFERRED:
6054 nbl = NULL;
6055
6056 case -EAGAIN:
6057 status = nfserr_denied;
6058 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
6059 nfs4_set_lock_denied(conflock, &lock->lk_denied);
6060 break;
6061 case -EDEADLK:
6062 status = nfserr_deadlock;
6063 break;
6064 default:
6065 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
6066 status = nfserrno(err);
6067 break;
6068 }
6069out:
6070 if (nbl) {
6071
6072 if (fl_flags & FL_SLEEP) {
6073 spin_lock(&nn->blocked_locks_lock);
6074 list_del_init(&nbl->nbl_list);
6075 list_del_init(&nbl->nbl_lru);
6076 spin_unlock(&nn->blocked_locks_lock);
6077 }
6078 free_blocked_lock(nbl);
6079 }
6080 if (filp)
6081 fput(filp);
6082 if (lock_stp) {
6083
6084 if (cstate->replay_owner &&
6085 cstate->replay_owner != &lock_sop->lo_owner &&
6086 seqid_mutating_err(ntohl(status)))
6087 lock_sop->lo_owner.so_seqid++;
6088
6089
6090
6091
6092
6093 if (status && new)
6094 release_lock_stateid(lock_stp);
6095
6096 mutex_unlock(&lock_stp->st_mutex);
6097
6098 nfs4_put_stid(&lock_stp->st_stid);
6099 }
6100 if (open_stp)
6101 nfs4_put_stid(&open_stp->st_stid);
6102 nfsd4_bump_seqid(cstate, status);
6103 if (conflock)
6104 locks_free_lock(conflock);
6105 return status;
6106}
6107
6108
6109
6110
6111
6112
6113
6114static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
6115{
6116 struct file *file;
6117 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
6118 if (!err) {
6119 err = nfserrno(vfs_test_lock(file, lock));
6120 fput(file);
6121 }
6122 return err;
6123}
6124
6125
6126
6127
6128__be32
6129nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6130 union nfsd4_op_u *u)
6131{
6132 struct nfsd4_lockt *lockt = &u->lockt;
6133 struct file_lock *file_lock = NULL;
6134 struct nfs4_lockowner *lo = NULL;
6135 __be32 status;
6136 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6137
6138 if (locks_in_grace(SVC_NET(rqstp)))
6139 return nfserr_grace;
6140
6141 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
6142 return nfserr_inval;
6143
6144 if (!nfsd4_has_session(cstate)) {
6145 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
6146 if (status)
6147 goto out;
6148 }
6149
6150 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
6151 goto out;
6152
6153 file_lock = locks_alloc_lock();
6154 if (!file_lock) {
6155 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6156 status = nfserr_jukebox;
6157 goto out;
6158 }
6159
6160 switch (lockt->lt_type) {
6161 case NFS4_READ_LT:
6162 case NFS4_READW_LT:
6163 file_lock->fl_type = F_RDLCK;
6164 break;
6165 case NFS4_WRITE_LT:
6166 case NFS4_WRITEW_LT:
6167 file_lock->fl_type = F_WRLCK;
6168 break;
6169 default:
6170 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
6171 status = nfserr_inval;
6172 goto out;
6173 }
6174
6175 lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);
6176 if (lo)
6177 file_lock->fl_owner = (fl_owner_t)lo;
6178 file_lock->fl_pid = current->tgid;
6179 file_lock->fl_flags = FL_POSIX;
6180
6181 file_lock->fl_start = lockt->lt_offset;
6182 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
6183
6184 nfs4_transform_lock_offset(file_lock);
6185
6186 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
6187 if (status)
6188 goto out;
6189
6190 if (file_lock->fl_type != F_UNLCK) {
6191 status = nfserr_denied;
6192 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
6193 }
6194out:
6195 if (lo)
6196 nfs4_put_stateowner(&lo->lo_owner);
6197 if (file_lock)
6198 locks_free_lock(file_lock);
6199 return status;
6200}
6201
6202__be32
6203nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6204 union nfsd4_op_u *u)
6205{
6206 struct nfsd4_locku *locku = &u->locku;
6207 struct nfs4_ol_stateid *stp;
6208 struct file *filp = NULL;
6209 struct file_lock *file_lock = NULL;
6210 __be32 status;
6211 int err;
6212 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6213
6214 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
6215 (long long) locku->lu_offset,
6216 (long long) locku->lu_length);
6217
6218 if (check_lock_length(locku->lu_offset, locku->lu_length))
6219 return nfserr_inval;
6220
6221 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
6222 &locku->lu_stateid, NFS4_LOCK_STID,
6223 &stp, nn);
6224 if (status)
6225 goto out;
6226 filp = find_any_file(stp->st_stid.sc_file);
6227 if (!filp) {
6228 status = nfserr_lock_range;
6229 goto put_stateid;
6230 }
6231 file_lock = locks_alloc_lock();
6232 if (!file_lock) {
6233 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6234 status = nfserr_jukebox;
6235 goto fput;
6236 }
6237
6238 file_lock->fl_type = F_UNLCK;
6239 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
6240 file_lock->fl_pid = current->tgid;
6241 file_lock->fl_file = filp;
6242 file_lock->fl_flags = FL_POSIX;
6243 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6244 file_lock->fl_start = locku->lu_offset;
6245
6246 file_lock->fl_end = last_byte_offset(locku->lu_offset,
6247 locku->lu_length);
6248 nfs4_transform_lock_offset(file_lock);
6249
6250 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
6251 if (err) {
6252 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
6253 goto out_nfserr;
6254 }
6255 nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);
6256fput:
6257 fput(filp);
6258put_stateid:
6259 mutex_unlock(&stp->st_mutex);
6260 nfs4_put_stid(&stp->st_stid);
6261out:
6262 nfsd4_bump_seqid(cstate, status);
6263 if (file_lock)
6264 locks_free_lock(file_lock);
6265 return status;
6266
6267out_nfserr:
6268 status = nfserrno(err);
6269 goto fput;
6270}
6271
6272
6273
6274
6275
6276
6277static bool
6278check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
6279{
6280 struct file_lock *fl;
6281 int status = false;
6282 struct file *filp = find_any_file(fp);
6283 struct inode *inode;
6284 struct file_lock_context *flctx;
6285
6286 if (!filp) {
6287
6288 WARN_ON_ONCE(1);
6289 return status;
6290 }
6291
6292 inode = file_inode(filp);
6293 flctx = inode->i_flctx;
6294
6295 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
6296 spin_lock(&flctx->flc_lock);
6297 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
6298 if (fl->fl_owner == (fl_owner_t)lowner) {
6299 status = true;
6300 break;
6301 }
6302 }
6303 spin_unlock(&flctx->flc_lock);
6304 }
6305 fput(filp);
6306 return status;
6307}
6308
6309__be32
6310nfsd4_release_lockowner(struct svc_rqst *rqstp,
6311 struct nfsd4_compound_state *cstate,
6312 union nfsd4_op_u *u)
6313{
6314 struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
6315 clientid_t *clid = &rlockowner->rl_clientid;
6316 struct nfs4_stateowner *sop;
6317 struct nfs4_lockowner *lo = NULL;
6318 struct nfs4_ol_stateid *stp;
6319 struct xdr_netobj *owner = &rlockowner->rl_owner;
6320 unsigned int hashval = ownerstr_hashval(owner);
6321 __be32 status;
6322 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6323 struct nfs4_client *clp;
6324 LIST_HEAD (reaplist);
6325
6326 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
6327 clid->cl_boot, clid->cl_id);
6328
6329 status = lookup_clientid(clid, cstate, nn);
6330 if (status)
6331 return status;
6332
6333 clp = cstate->clp;
6334
6335 spin_lock(&clp->cl_lock);
6336 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
6337 so_strhash) {
6338
6339 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
6340 continue;
6341
6342
6343 lo = lockowner(sop);
6344 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
6345 if (check_for_locks(stp->st_stid.sc_file, lo)) {
6346 status = nfserr_locks_held;
6347 spin_unlock(&clp->cl_lock);
6348 return status;
6349 }
6350 }
6351
6352 nfs4_get_stateowner(sop);
6353 break;
6354 }
6355 if (!lo) {
6356 spin_unlock(&clp->cl_lock);
6357 return status;
6358 }
6359
6360 unhash_lockowner_locked(lo);
6361 while (!list_empty(&lo->lo_owner.so_stateids)) {
6362 stp = list_first_entry(&lo->lo_owner.so_stateids,
6363 struct nfs4_ol_stateid,
6364 st_perstateowner);
6365 WARN_ON(!unhash_lock_stateid(stp));
6366 put_ol_stateid_locked(stp, &reaplist);
6367 }
6368 spin_unlock(&clp->cl_lock);
6369 free_ol_stateid_reaplist(&reaplist);
6370 remove_blocked_locks(lo);
6371 nfs4_put_stateowner(&lo->lo_owner);
6372
6373 return status;
6374}
6375
6376static inline struct nfs4_client_reclaim *
6377alloc_reclaim(void)
6378{
6379 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
6380}
6381
6382bool
6383nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
6384{
6385 struct nfs4_client_reclaim *crp;
6386
6387 crp = nfsd4_find_reclaim_client(name, nn);
6388 return (crp && crp->cr_clp);
6389}
6390
6391
6392
6393
6394struct nfs4_client_reclaim *
6395nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
6396{
6397 unsigned int strhashval;
6398 struct nfs4_client_reclaim *crp;
6399
6400 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
6401 crp = alloc_reclaim();
6402 if (crp) {
6403 strhashval = clientstr_hashval(name);
6404 INIT_LIST_HEAD(&crp->cr_strhash);
6405 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
6406 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
6407 crp->cr_clp = NULL;
6408 nn->reclaim_str_hashtbl_size++;
6409 }
6410 return crp;
6411}
6412
6413void
6414nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
6415{
6416 list_del(&crp->cr_strhash);
6417 kfree(crp);
6418 nn->reclaim_str_hashtbl_size--;
6419}
6420
6421void
6422nfs4_release_reclaim(struct nfsd_net *nn)
6423{
6424 struct nfs4_client_reclaim *crp = NULL;
6425 int i;
6426
6427 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6428 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
6429 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
6430 struct nfs4_client_reclaim, cr_strhash);
6431 nfs4_remove_reclaim_record(crp, nn);
6432 }
6433 }
6434 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
6435}
6436
6437
6438
6439struct nfs4_client_reclaim *
6440nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
6441{
6442 unsigned int strhashval;
6443 struct nfs4_client_reclaim *crp = NULL;
6444
6445 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
6446
6447 strhashval = clientstr_hashval(recdir);
6448 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
6449 if (same_name(crp->cr_recdir, recdir)) {
6450 return crp;
6451 }
6452 }
6453 return NULL;
6454}
6455
6456
6457
6458
6459__be32
6460nfs4_check_open_reclaim(clientid_t *clid,
6461 struct nfsd4_compound_state *cstate,
6462 struct nfsd_net *nn)
6463{
6464 __be32 status;
6465
6466
6467 status = lookup_clientid(clid, cstate, nn);
6468 if (status)
6469 return nfserr_reclaim_bad;
6470
6471 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
6472 return nfserr_no_grace;
6473
6474 if (nfsd4_client_record_check(cstate->clp))
6475 return nfserr_reclaim_bad;
6476
6477 return nfs_ok;
6478}
6479
6480#ifdef CONFIG_NFSD_FAULT_INJECTION
6481static inline void
6482put_client(struct nfs4_client *clp)
6483{
6484 atomic_dec(&clp->cl_refcount);
6485}
6486
6487static struct nfs4_client *
6488nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
6489{
6490 struct nfs4_client *clp;
6491 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6492 nfsd_net_id);
6493
6494 if (!nfsd_netns_ready(nn))
6495 return NULL;
6496
6497 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6498 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
6499 return clp;
6500 }
6501 return NULL;
6502}
6503
6504u64
6505nfsd_inject_print_clients(void)
6506{
6507 struct nfs4_client *clp;
6508 u64 count = 0;
6509 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6510 nfsd_net_id);
6511 char buf[INET6_ADDRSTRLEN];
6512
6513 if (!nfsd_netns_ready(nn))
6514 return 0;
6515
6516 spin_lock(&nn->client_lock);
6517 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6518 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
6519 pr_info("NFS Client: %s\n", buf);
6520 ++count;
6521 }
6522 spin_unlock(&nn->client_lock);
6523
6524 return count;
6525}
6526
6527u64
6528nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size)
6529{
6530 u64 count = 0;
6531 struct nfs4_client *clp;
6532 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6533 nfsd_net_id);
6534
6535 if (!nfsd_netns_ready(nn))
6536 return count;
6537
6538 spin_lock(&nn->client_lock);
6539 clp = nfsd_find_client(addr, addr_size);
6540 if (clp) {
6541 if (mark_client_expired_locked(clp) == nfs_ok)
6542 ++count;
6543 else
6544 clp = NULL;
6545 }
6546 spin_unlock(&nn->client_lock);
6547
6548 if (clp)
6549 expire_client(clp);
6550
6551 return count;
6552}
6553
6554u64
6555nfsd_inject_forget_clients(u64 max)
6556{
6557 u64 count = 0;
6558 struct nfs4_client *clp, *next;
6559 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6560 nfsd_net_id);
6561 LIST_HEAD(reaplist);
6562
6563 if (!nfsd_netns_ready(nn))
6564 return count;
6565
6566 spin_lock(&nn->client_lock);
6567 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6568 if (mark_client_expired_locked(clp) == nfs_ok) {
6569 list_add(&clp->cl_lru, &reaplist);
6570 if (max != 0 && ++count >= max)
6571 break;
6572 }
6573 }
6574 spin_unlock(&nn->client_lock);
6575
6576 list_for_each_entry_safe(clp, next, &reaplist, cl_lru)
6577 expire_client(clp);
6578
6579 return count;
6580}
6581
6582static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
6583 const char *type)
6584{
6585 char buf[INET6_ADDRSTRLEN];
6586 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
6587 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
6588}
6589
6590static void
6591nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
6592 struct list_head *collect)
6593{
6594 struct nfs4_client *clp = lst->st_stid.sc_client;
6595 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6596 nfsd_net_id);
6597
6598 if (!collect)
6599 return;
6600
6601 lockdep_assert_held(&nn->client_lock);
6602 atomic_inc(&clp->cl_refcount);
6603 list_add(&lst->st_locks, collect);
6604}
6605
6606static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
6607 struct list_head *collect,
6608 bool (*func)(struct nfs4_ol_stateid *))
6609{
6610 struct nfs4_openowner *oop;
6611 struct nfs4_ol_stateid *stp, *st_next;
6612 struct nfs4_ol_stateid *lst, *lst_next;
6613 u64 count = 0;
6614
6615 spin_lock(&clp->cl_lock);
6616 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
6617 list_for_each_entry_safe(stp, st_next,
6618 &oop->oo_owner.so_stateids, st_perstateowner) {
6619 list_for_each_entry_safe(lst, lst_next,
6620 &stp->st_locks, st_locks) {
6621 if (func) {
6622 if (func(lst))
6623 nfsd_inject_add_lock_to_list(lst,
6624 collect);
6625 }
6626 ++count;
6627
6628
6629
6630
6631
6632
6633
6634 WARN_ON_ONCE(count == (INT_MAX / 2));
6635 if (count == max)
6636 goto out;
6637 }
6638 }
6639 }
6640out:
6641 spin_unlock(&clp->cl_lock);
6642
6643 return count;
6644}
6645
6646static u64
6647nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect,
6648 u64 max)
6649{
6650 return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid);
6651}
6652
6653static u64
6654nfsd_print_client_locks(struct nfs4_client *clp)
6655{
6656 u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL);
6657 nfsd_print_count(clp, count, "locked files");
6658 return count;
6659}
6660
6661u64
6662nfsd_inject_print_locks(void)
6663{
6664 struct nfs4_client *clp;
6665 u64 count = 0;
6666 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6667 nfsd_net_id);
6668
6669 if (!nfsd_netns_ready(nn))
6670 return 0;
6671
6672 spin_lock(&nn->client_lock);
6673 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6674 count += nfsd_print_client_locks(clp);
6675 spin_unlock(&nn->client_lock);
6676
6677 return count;
6678}
6679
6680static void
6681nfsd_reap_locks(struct list_head *reaplist)
6682{
6683 struct nfs4_client *clp;
6684 struct nfs4_ol_stateid *stp, *next;
6685
6686 list_for_each_entry_safe(stp, next, reaplist, st_locks) {
6687 list_del_init(&stp->st_locks);
6688 clp = stp->st_stid.sc_client;
6689 nfs4_put_stid(&stp->st_stid);
6690 put_client(clp);
6691 }
6692}
6693
6694u64
6695nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size)
6696{
6697 unsigned int count = 0;
6698 struct nfs4_client *clp;
6699 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6700 nfsd_net_id);
6701 LIST_HEAD(reaplist);
6702
6703 if (!nfsd_netns_ready(nn))
6704 return count;
6705
6706 spin_lock(&nn->client_lock);
6707 clp = nfsd_find_client(addr, addr_size);
6708 if (clp)
6709 count = nfsd_collect_client_locks(clp, &reaplist, 0);
6710 spin_unlock(&nn->client_lock);
6711 nfsd_reap_locks(&reaplist);
6712 return count;
6713}
6714
6715u64
6716nfsd_inject_forget_locks(u64 max)
6717{
6718 u64 count = 0;
6719 struct nfs4_client *clp;
6720 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6721 nfsd_net_id);
6722 LIST_HEAD(reaplist);
6723
6724 if (!nfsd_netns_ready(nn))
6725 return count;
6726
6727 spin_lock(&nn->client_lock);
6728 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6729 count += nfsd_collect_client_locks(clp, &reaplist, max - count);
6730 if (max != 0 && count >= max)
6731 break;
6732 }
6733 spin_unlock(&nn->client_lock);
6734 nfsd_reap_locks(&reaplist);
6735 return count;
6736}
6737
6738static u64
6739nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
6740 struct list_head *collect,
6741 void (*func)(struct nfs4_openowner *))
6742{
6743 struct nfs4_openowner *oop, *next;
6744 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6745 nfsd_net_id);
6746 u64 count = 0;
6747
6748 lockdep_assert_held(&nn->client_lock);
6749
6750 spin_lock(&clp->cl_lock);
6751 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
6752 if (func) {
6753 func(oop);
6754 if (collect) {
6755 atomic_inc(&clp->cl_refcount);
6756 list_add(&oop->oo_perclient, collect);
6757 }
6758 }
6759 ++count;
6760
6761
6762
6763
6764
6765
6766 WARN_ON_ONCE(count == (INT_MAX / 2));
6767 if (count == max)
6768 break;
6769 }
6770 spin_unlock(&clp->cl_lock);
6771
6772 return count;
6773}
6774
6775static u64
6776nfsd_print_client_openowners(struct nfs4_client *clp)
6777{
6778 u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL);
6779
6780 nfsd_print_count(clp, count, "openowners");
6781 return count;
6782}
6783
6784static u64
6785nfsd_collect_client_openowners(struct nfs4_client *clp,
6786 struct list_head *collect, u64 max)
6787{
6788 return nfsd_foreach_client_openowner(clp, max, collect,
6789 unhash_openowner_locked);
6790}
6791
6792u64
6793nfsd_inject_print_openowners(void)
6794{
6795 struct nfs4_client *clp;
6796 u64 count = 0;
6797 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6798 nfsd_net_id);
6799
6800 if (!nfsd_netns_ready(nn))
6801 return 0;
6802
6803 spin_lock(&nn->client_lock);
6804 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6805 count += nfsd_print_client_openowners(clp);
6806 spin_unlock(&nn->client_lock);
6807
6808 return count;
6809}
6810
6811static void
6812nfsd_reap_openowners(struct list_head *reaplist)
6813{
6814 struct nfs4_client *clp;
6815 struct nfs4_openowner *oop, *next;
6816
6817 list_for_each_entry_safe(oop, next, reaplist, oo_perclient) {
6818 list_del_init(&oop->oo_perclient);
6819 clp = oop->oo_owner.so_client;
6820 release_openowner(oop);
6821 put_client(clp);
6822 }
6823}
6824
6825u64
6826nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr,
6827 size_t addr_size)
6828{
6829 unsigned int count = 0;
6830 struct nfs4_client *clp;
6831 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6832 nfsd_net_id);
6833 LIST_HEAD(reaplist);
6834
6835 if (!nfsd_netns_ready(nn))
6836 return count;
6837
6838 spin_lock(&nn->client_lock);
6839 clp = nfsd_find_client(addr, addr_size);
6840 if (clp)
6841 count = nfsd_collect_client_openowners(clp, &reaplist, 0);
6842 spin_unlock(&nn->client_lock);
6843 nfsd_reap_openowners(&reaplist);
6844 return count;
6845}
6846
6847u64
6848nfsd_inject_forget_openowners(u64 max)
6849{
6850 u64 count = 0;
6851 struct nfs4_client *clp;
6852 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6853 nfsd_net_id);
6854 LIST_HEAD(reaplist);
6855
6856 if (!nfsd_netns_ready(nn))
6857 return count;
6858
6859 spin_lock(&nn->client_lock);
6860 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6861 count += nfsd_collect_client_openowners(clp, &reaplist,
6862 max - count);
6863 if (max != 0 && count >= max)
6864 break;
6865 }
6866 spin_unlock(&nn->client_lock);
6867 nfsd_reap_openowners(&reaplist);
6868 return count;
6869}
6870
6871static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
6872 struct list_head *victims)
6873{
6874 struct nfs4_delegation *dp, *next;
6875 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6876 nfsd_net_id);
6877 u64 count = 0;
6878
6879 lockdep_assert_held(&nn->client_lock);
6880
6881 spin_lock(&state_lock);
6882 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
6883 if (victims) {
6884
6885
6886
6887
6888
6889
6890 if (dp->dl_time != 0)
6891 continue;
6892
6893 atomic_inc(&clp->cl_refcount);
6894 WARN_ON(!unhash_delegation_locked(dp));
6895 list_add(&dp->dl_recall_lru, victims);
6896 }
6897 ++count;
6898
6899
6900
6901
6902
6903
6904 WARN_ON_ONCE(count == (INT_MAX / 2));
6905 if (count == max)
6906 break;
6907 }
6908 spin_unlock(&state_lock);
6909 return count;
6910}
6911
6912static u64
6913nfsd_print_client_delegations(struct nfs4_client *clp)
6914{
6915 u64 count = nfsd_find_all_delegations(clp, 0, NULL);
6916
6917 nfsd_print_count(clp, count, "delegations");
6918 return count;
6919}
6920
6921u64
6922nfsd_inject_print_delegations(void)
6923{
6924 struct nfs4_client *clp;
6925 u64 count = 0;
6926 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6927 nfsd_net_id);
6928
6929 if (!nfsd_netns_ready(nn))
6930 return 0;
6931
6932 spin_lock(&nn->client_lock);
6933 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6934 count += nfsd_print_client_delegations(clp);
6935 spin_unlock(&nn->client_lock);
6936
6937 return count;
6938}
6939
6940static void
6941nfsd_forget_delegations(struct list_head *reaplist)
6942{
6943 struct nfs4_client *clp;
6944 struct nfs4_delegation *dp, *next;
6945
6946 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6947 list_del_init(&dp->dl_recall_lru);
6948 clp = dp->dl_stid.sc_client;
6949 revoke_delegation(dp);
6950 put_client(clp);
6951 }
6952}
6953
6954u64
6955nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr,
6956 size_t addr_size)
6957{
6958 u64 count = 0;
6959 struct nfs4_client *clp;
6960 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6961 nfsd_net_id);
6962 LIST_HEAD(reaplist);
6963
6964 if (!nfsd_netns_ready(nn))
6965 return count;
6966
6967 spin_lock(&nn->client_lock);
6968 clp = nfsd_find_client(addr, addr_size);
6969 if (clp)
6970 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6971 spin_unlock(&nn->client_lock);
6972
6973 nfsd_forget_delegations(&reaplist);
6974 return count;
6975}
6976
6977u64
6978nfsd_inject_forget_delegations(u64 max)
6979{
6980 u64 count = 0;
6981 struct nfs4_client *clp;
6982 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6983 nfsd_net_id);
6984 LIST_HEAD(reaplist);
6985
6986 if (!nfsd_netns_ready(nn))
6987 return count;
6988
6989 spin_lock(&nn->client_lock);
6990 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6991 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6992 if (max != 0 && count >= max)
6993 break;
6994 }
6995 spin_unlock(&nn->client_lock);
6996 nfsd_forget_delegations(&reaplist);
6997 return count;
6998}
6999
7000static void
7001nfsd_recall_delegations(struct list_head *reaplist)
7002{
7003 struct nfs4_client *clp;
7004 struct nfs4_delegation *dp, *next;
7005
7006 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
7007 list_del_init(&dp->dl_recall_lru);
7008 clp = dp->dl_stid.sc_client;
7009
7010
7011
7012
7013
7014
7015 spin_lock(&state_lock);
7016 dp->dl_time = 0;
7017 spin_unlock(&state_lock);
7018 nfsd_break_one_deleg(dp);
7019 put_client(clp);
7020 }
7021}
7022
7023u64
7024nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr,
7025 size_t addr_size)
7026{
7027 u64 count = 0;
7028 struct nfs4_client *clp;
7029 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7030 nfsd_net_id);
7031 LIST_HEAD(reaplist);
7032
7033 if (!nfsd_netns_ready(nn))
7034 return count;
7035
7036 spin_lock(&nn->client_lock);
7037 clp = nfsd_find_client(addr, addr_size);
7038 if (clp)
7039 count = nfsd_find_all_delegations(clp, 0, &reaplist);
7040 spin_unlock(&nn->client_lock);
7041
7042 nfsd_recall_delegations(&reaplist);
7043 return count;
7044}
7045
7046u64
7047nfsd_inject_recall_delegations(u64 max)
7048{
7049 u64 count = 0;
7050 struct nfs4_client *clp, *next;
7051 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7052 nfsd_net_id);
7053 LIST_HEAD(reaplist);
7054
7055 if (!nfsd_netns_ready(nn))
7056 return count;
7057
7058 spin_lock(&nn->client_lock);
7059 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
7060 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
7061 if (max != 0 && ++count >= max)
7062 break;
7063 }
7064 spin_unlock(&nn->client_lock);
7065 nfsd_recall_delegations(&reaplist);
7066 return count;
7067}
7068#endif
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079static void
7080set_max_delegations(void)
7081{
7082
7083
7084
7085
7086
7087
7088 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
7089}
7090
7091static int nfs4_state_create_net(struct net *net)
7092{
7093 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7094 int i;
7095
7096 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
7097 CLIENT_HASH_SIZE, GFP_KERNEL);
7098 if (!nn->conf_id_hashtbl)
7099 goto err;
7100 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
7101 CLIENT_HASH_SIZE, GFP_KERNEL);
7102 if (!nn->unconf_id_hashtbl)
7103 goto err_unconf_id;
7104 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
7105 SESSION_HASH_SIZE, GFP_KERNEL);
7106 if (!nn->sessionid_hashtbl)
7107 goto err_sessionid;
7108
7109 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7110 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
7111 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
7112 }
7113 for (i = 0; i < SESSION_HASH_SIZE; i++)
7114 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
7115 nn->conf_name_tree = RB_ROOT;
7116 nn->unconf_name_tree = RB_ROOT;
7117 nn->boot_time = get_seconds();
7118 nn->grace_ended = false;
7119 nn->nfsd4_manager.block_opens = true;
7120 INIT_LIST_HEAD(&nn->nfsd4_manager.list);
7121 INIT_LIST_HEAD(&nn->client_lru);
7122 INIT_LIST_HEAD(&nn->close_lru);
7123 INIT_LIST_HEAD(&nn->del_recall_lru);
7124 spin_lock_init(&nn->client_lock);
7125
7126 spin_lock_init(&nn->blocked_locks_lock);
7127 INIT_LIST_HEAD(&nn->blocked_locks_lru);
7128
7129 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
7130 get_net(net);
7131
7132 return 0;
7133
7134err_sessionid:
7135 kfree(nn->unconf_id_hashtbl);
7136err_unconf_id:
7137 kfree(nn->conf_id_hashtbl);
7138err:
7139 return -ENOMEM;
7140}
7141
7142static void
7143nfs4_state_destroy_net(struct net *net)
7144{
7145 int i;
7146 struct nfs4_client *clp = NULL;
7147 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7148
7149 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7150 while (!list_empty(&nn->conf_id_hashtbl[i])) {
7151 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7152 destroy_client(clp);
7153 }
7154 }
7155
7156 WARN_ON(!list_empty(&nn->blocked_locks_lru));
7157
7158 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7159 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
7160 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7161 destroy_client(clp);
7162 }
7163 }
7164
7165 kfree(nn->sessionid_hashtbl);
7166 kfree(nn->unconf_id_hashtbl);
7167 kfree(nn->conf_id_hashtbl);
7168 put_net(net);
7169}
7170
7171int
7172nfs4_state_start_net(struct net *net)
7173{
7174 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7175 int ret;
7176
7177 ret = nfs4_state_create_net(net);
7178 if (ret)
7179 return ret;
7180 locks_start_grace(net, &nn->nfsd4_manager);
7181 nfsd4_client_tracking_init(net);
7182 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
7183 nn->nfsd4_grace, net->ns.inum);
7184 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
7185 return 0;
7186}
7187
7188
7189
7190int
7191nfs4_state_start(void)
7192{
7193 int ret;
7194
7195 ret = set_callback_cred();
7196 if (ret)
7197 return ret;
7198
7199 laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
7200 if (laundry_wq == NULL) {
7201 ret = -ENOMEM;
7202 goto out_cleanup_cred;
7203 }
7204 ret = nfsd4_create_callback_queue();
7205 if (ret)
7206 goto out_free_laundry;
7207
7208 set_max_delegations();
7209 return 0;
7210
7211out_free_laundry:
7212 destroy_workqueue(laundry_wq);
7213out_cleanup_cred:
7214 cleanup_callback_cred();
7215 return ret;
7216}
7217
7218void
7219nfs4_state_shutdown_net(struct net *net)
7220{
7221 struct nfs4_delegation *dp = NULL;
7222 struct list_head *pos, *next, reaplist;
7223 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7224
7225 cancel_delayed_work_sync(&nn->laundromat_work);
7226 locks_end_grace(&nn->nfsd4_manager);
7227
7228 INIT_LIST_HEAD(&reaplist);
7229 spin_lock(&state_lock);
7230 list_for_each_safe(pos, next, &nn->del_recall_lru) {
7231 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7232 WARN_ON(!unhash_delegation_locked(dp));
7233 list_add(&dp->dl_recall_lru, &reaplist);
7234 }
7235 spin_unlock(&state_lock);
7236 list_for_each_safe(pos, next, &reaplist) {
7237 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7238 list_del_init(&dp->dl_recall_lru);
7239 destroy_unhashed_deleg(dp);
7240 }
7241
7242 nfsd4_client_tracking_exit(net);
7243 nfs4_state_destroy_net(net);
7244}
7245
7246void
7247nfs4_state_shutdown(void)
7248{
7249 destroy_workqueue(laundry_wq);
7250 nfsd4_destroy_callback_queue();
7251 cleanup_callback_cred();
7252}
7253
7254static void
7255get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7256{
7257 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
7258 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
7259}
7260
7261static void
7262put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7263{
7264 if (cstate->minorversion) {
7265 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
7266 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7267 }
7268}
7269
7270void
7271clear_current_stateid(struct nfsd4_compound_state *cstate)
7272{
7273 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7274}
7275
7276
7277
7278
7279void
7280nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate,
7281 union nfsd4_op_u *u)
7282{
7283 put_stateid(cstate, &u->open_downgrade.od_stateid);
7284}
7285
7286void
7287nfsd4_set_openstateid(struct nfsd4_compound_state *cstate,
7288 union nfsd4_op_u *u)
7289{
7290 put_stateid(cstate, &u->open.op_stateid);
7291}
7292
7293void
7294nfsd4_set_closestateid(struct nfsd4_compound_state *cstate,
7295 union nfsd4_op_u *u)
7296{
7297 put_stateid(cstate, &u->close.cl_stateid);
7298}
7299
7300void
7301nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate,
7302 union nfsd4_op_u *u)
7303{
7304 put_stateid(cstate, &u->lock.lk_resp_stateid);
7305}
7306
7307
7308
7309
7310
7311void
7312nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate,
7313 union nfsd4_op_u *u)
7314{
7315 get_stateid(cstate, &u->open_downgrade.od_stateid);
7316}
7317
7318void
7319nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate,
7320 union nfsd4_op_u *u)
7321{
7322 get_stateid(cstate, &u->delegreturn.dr_stateid);
7323}
7324
7325void
7326nfsd4_get_freestateid(struct nfsd4_compound_state *cstate,
7327 union nfsd4_op_u *u)
7328{
7329 get_stateid(cstate, &u->free_stateid.fr_stateid);
7330}
7331
7332void
7333nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate,
7334 union nfsd4_op_u *u)
7335{
7336 get_stateid(cstate, &u->setattr.sa_stateid);
7337}
7338
7339void
7340nfsd4_get_closestateid(struct nfsd4_compound_state *cstate,
7341 union nfsd4_op_u *u)
7342{
7343 get_stateid(cstate, &u->close.cl_stateid);
7344}
7345
7346void
7347nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate,
7348 union nfsd4_op_u *u)
7349{
7350 get_stateid(cstate, &u->locku.lu_stateid);
7351}
7352
7353void
7354nfsd4_get_readstateid(struct nfsd4_compound_state *cstate,
7355 union nfsd4_op_u *u)
7356{
7357 get_stateid(cstate, &u->read.rd_stateid);
7358}
7359
7360void
7361nfsd4_get_writestateid(struct nfsd4_compound_state *cstate,
7362 union nfsd4_op_u *u)
7363{
7364 get_stateid(cstate, &u->write.wr_stateid);
7365}
7366