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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 <linux/string_helpers.h>
46#include "xdr4.h"
47#include "xdr4cb.h"
48#include "vfs.h"
49#include "current_stateid.h"
50
51#include "netns.h"
52#include "pnfs.h"
53
54#define NFSDDBG_FACILITY NFSDDBG_PROC
55
56#define all_ones {{~0,~0},~0}
57static const stateid_t one_stateid = {
58 .si_generation = ~0,
59 .si_opaque = all_ones,
60};
61static const stateid_t zero_stateid = {
62
63};
64static const stateid_t currentstateid = {
65 .si_generation = 1,
66};
67static const stateid_t close_stateid = {
68 .si_generation = 0xffffffffU,
69};
70
71static u64 current_sessionid = 1;
72
73#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
74#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
75#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
76#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
77
78
79static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
80static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
81void nfsd4_end_grace(struct nfsd_net *nn);
82
83
84
85
86
87
88
89
90static DEFINE_SPINLOCK(state_lock);
91
92enum nfsd4_st_mutex_lock_subclass {
93 OPEN_STATEID_MUTEX = 0,
94 LOCK_STATEID_MUTEX = 1,
95};
96
97
98
99
100
101static DECLARE_WAIT_QUEUE_HEAD(close_wq);
102
103
104
105
106
107
108static DECLARE_WAIT_QUEUE_HEAD(expiry_wq);
109
110static struct kmem_cache *client_slab;
111static struct kmem_cache *openowner_slab;
112static struct kmem_cache *lockowner_slab;
113static struct kmem_cache *file_slab;
114static struct kmem_cache *stateid_slab;
115static struct kmem_cache *deleg_slab;
116static struct kmem_cache *odstate_slab;
117
118static void free_session(struct nfsd4_session *);
119
120static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
121static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
122
123static bool is_session_dead(struct nfsd4_session *ses)
124{
125 return ses->se_flags & NFS4_SESSION_DEAD;
126}
127
128static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
129{
130 if (atomic_read(&ses->se_ref) > ref_held_by_me)
131 return nfserr_jukebox;
132 ses->se_flags |= NFS4_SESSION_DEAD;
133 return nfs_ok;
134}
135
136static bool is_client_expired(struct nfs4_client *clp)
137{
138 return clp->cl_time == 0;
139}
140
141static __be32 get_client_locked(struct nfs4_client *clp)
142{
143 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
144
145 lockdep_assert_held(&nn->client_lock);
146
147 if (is_client_expired(clp))
148 return nfserr_expired;
149 atomic_inc(&clp->cl_rpc_users);
150 return nfs_ok;
151}
152
153
154static inline void
155renew_client_locked(struct nfs4_client *clp)
156{
157 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
158
159 if (is_client_expired(clp)) {
160 WARN_ON(1);
161 printk("%s: client (clientid %08x/%08x) already expired\n",
162 __func__,
163 clp->cl_clientid.cl_boot,
164 clp->cl_clientid.cl_id);
165 return;
166 }
167
168 dprintk("renewing client (clientid %08x/%08x)\n",
169 clp->cl_clientid.cl_boot,
170 clp->cl_clientid.cl_id);
171 list_move_tail(&clp->cl_lru, &nn->client_lru);
172 clp->cl_time = get_seconds();
173}
174
175static void put_client_renew_locked(struct nfs4_client *clp)
176{
177 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
178
179 lockdep_assert_held(&nn->client_lock);
180
181 if (!atomic_dec_and_test(&clp->cl_rpc_users))
182 return;
183 if (!is_client_expired(clp))
184 renew_client_locked(clp);
185 else
186 wake_up_all(&expiry_wq);
187}
188
189static void put_client_renew(struct nfs4_client *clp)
190{
191 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
192
193 if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))
194 return;
195 if (!is_client_expired(clp))
196 renew_client_locked(clp);
197 else
198 wake_up_all(&expiry_wq);
199 spin_unlock(&nn->client_lock);
200}
201
202static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
203{
204 __be32 status;
205
206 if (is_session_dead(ses))
207 return nfserr_badsession;
208 status = get_client_locked(ses->se_client);
209 if (status)
210 return status;
211 atomic_inc(&ses->se_ref);
212 return nfs_ok;
213}
214
215static void nfsd4_put_session_locked(struct nfsd4_session *ses)
216{
217 struct nfs4_client *clp = ses->se_client;
218 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
219
220 lockdep_assert_held(&nn->client_lock);
221
222 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
223 free_session(ses);
224 put_client_renew_locked(clp);
225}
226
227static void nfsd4_put_session(struct nfsd4_session *ses)
228{
229 struct nfs4_client *clp = ses->se_client;
230 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
231
232 spin_lock(&nn->client_lock);
233 nfsd4_put_session_locked(ses);
234 spin_unlock(&nn->client_lock);
235}
236
237static struct nfsd4_blocked_lock *
238find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
239 struct nfsd_net *nn)
240{
241 struct nfsd4_blocked_lock *cur, *found = NULL;
242
243 spin_lock(&nn->blocked_locks_lock);
244 list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
245 if (fh_match(fh, &cur->nbl_fh)) {
246 list_del_init(&cur->nbl_list);
247 list_del_init(&cur->nbl_lru);
248 found = cur;
249 break;
250 }
251 }
252 spin_unlock(&nn->blocked_locks_lock);
253 if (found)
254 locks_delete_block(&found->nbl_lock);
255 return found;
256}
257
258static struct nfsd4_blocked_lock *
259find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
260 struct nfsd_net *nn)
261{
262 struct nfsd4_blocked_lock *nbl;
263
264 nbl = find_blocked_lock(lo, fh, nn);
265 if (!nbl) {
266 nbl= kmalloc(sizeof(*nbl), GFP_KERNEL);
267 if (nbl) {
268 fh_copy_shallow(&nbl->nbl_fh, fh);
269 locks_init_lock(&nbl->nbl_lock);
270 nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,
271 &nfsd4_cb_notify_lock_ops,
272 NFSPROC4_CLNT_CB_NOTIFY_LOCK);
273 }
274 }
275 return nbl;
276}
277
278static void
279free_blocked_lock(struct nfsd4_blocked_lock *nbl)
280{
281 locks_delete_block(&nbl->nbl_lock);
282 locks_release_private(&nbl->nbl_lock);
283 kfree(nbl);
284}
285
286static void
287remove_blocked_locks(struct nfs4_lockowner *lo)
288{
289 struct nfs4_client *clp = lo->lo_owner.so_client;
290 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
291 struct nfsd4_blocked_lock *nbl;
292 LIST_HEAD(reaplist);
293
294
295 spin_lock(&nn->blocked_locks_lock);
296 while (!list_empty(&lo->lo_blocked)) {
297 nbl = list_first_entry(&lo->lo_blocked,
298 struct nfsd4_blocked_lock,
299 nbl_list);
300 list_del_init(&nbl->nbl_list);
301 list_move(&nbl->nbl_lru, &reaplist);
302 }
303 spin_unlock(&nn->blocked_locks_lock);
304
305
306 while (!list_empty(&reaplist)) {
307 nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock,
308 nbl_lru);
309 list_del_init(&nbl->nbl_lru);
310 free_blocked_lock(nbl);
311 }
312}
313
314static void
315nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
316{
317 struct nfsd4_blocked_lock *nbl = container_of(cb,
318 struct nfsd4_blocked_lock, nbl_cb);
319 locks_delete_block(&nbl->nbl_lock);
320}
321
322static int
323nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
324{
325
326
327
328
329
330 switch (task->tk_status) {
331 case -NFS4ERR_DELAY:
332 rpc_delay(task, 1 * HZ);
333 return 0;
334 default:
335 return 1;
336 }
337}
338
339static void
340nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb)
341{
342 struct nfsd4_blocked_lock *nbl = container_of(cb,
343 struct nfsd4_blocked_lock, nbl_cb);
344
345 free_blocked_lock(nbl);
346}
347
348static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
349 .prepare = nfsd4_cb_notify_lock_prepare,
350 .done = nfsd4_cb_notify_lock_done,
351 .release = nfsd4_cb_notify_lock_release,
352};
353
354static inline struct nfs4_stateowner *
355nfs4_get_stateowner(struct nfs4_stateowner *sop)
356{
357 atomic_inc(&sop->so_count);
358 return sop;
359}
360
361static int
362same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
363{
364 return (sop->so_owner.len == owner->len) &&
365 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
366}
367
368static struct nfs4_openowner *
369find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
370 struct nfs4_client *clp)
371{
372 struct nfs4_stateowner *so;
373
374 lockdep_assert_held(&clp->cl_lock);
375
376 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
377 so_strhash) {
378 if (!so->so_is_open_owner)
379 continue;
380 if (same_owner_str(so, &open->op_owner))
381 return openowner(nfs4_get_stateowner(so));
382 }
383 return NULL;
384}
385
386static struct nfs4_openowner *
387find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
388 struct nfs4_client *clp)
389{
390 struct nfs4_openowner *oo;
391
392 spin_lock(&clp->cl_lock);
393 oo = find_openstateowner_str_locked(hashval, open, clp);
394 spin_unlock(&clp->cl_lock);
395 return oo;
396}
397
398static inline u32
399opaque_hashval(const void *ptr, int nbytes)
400{
401 unsigned char *cptr = (unsigned char *) ptr;
402
403 u32 x = 0;
404 while (nbytes--) {
405 x *= 37;
406 x += *cptr++;
407 }
408 return x;
409}
410
411static void nfsd4_free_file_rcu(struct rcu_head *rcu)
412{
413 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
414
415 kmem_cache_free(file_slab, fp);
416}
417
418void
419put_nfs4_file(struct nfs4_file *fi)
420{
421 might_lock(&state_lock);
422
423 if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {
424 hlist_del_rcu(&fi->fi_hash);
425 spin_unlock(&state_lock);
426 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
427 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
428 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
429 }
430}
431
432static struct file *
433__nfs4_get_fd(struct nfs4_file *f, int oflag)
434{
435 if (f->fi_fds[oflag])
436 return get_file(f->fi_fds[oflag]);
437 return NULL;
438}
439
440static struct file *
441find_writeable_file_locked(struct nfs4_file *f)
442{
443 struct file *ret;
444
445 lockdep_assert_held(&f->fi_lock);
446
447 ret = __nfs4_get_fd(f, O_WRONLY);
448 if (!ret)
449 ret = __nfs4_get_fd(f, O_RDWR);
450 return ret;
451}
452
453static struct file *
454find_writeable_file(struct nfs4_file *f)
455{
456 struct file *ret;
457
458 spin_lock(&f->fi_lock);
459 ret = find_writeable_file_locked(f);
460 spin_unlock(&f->fi_lock);
461
462 return ret;
463}
464
465static struct file *find_readable_file_locked(struct nfs4_file *f)
466{
467 struct file *ret;
468
469 lockdep_assert_held(&f->fi_lock);
470
471 ret = __nfs4_get_fd(f, O_RDONLY);
472 if (!ret)
473 ret = __nfs4_get_fd(f, O_RDWR);
474 return ret;
475}
476
477static struct file *
478find_readable_file(struct nfs4_file *f)
479{
480 struct file *ret;
481
482 spin_lock(&f->fi_lock);
483 ret = find_readable_file_locked(f);
484 spin_unlock(&f->fi_lock);
485
486 return ret;
487}
488
489struct file *
490find_any_file(struct nfs4_file *f)
491{
492 struct file *ret;
493
494 spin_lock(&f->fi_lock);
495 ret = __nfs4_get_fd(f, O_RDWR);
496 if (!ret) {
497 ret = __nfs4_get_fd(f, O_WRONLY);
498 if (!ret)
499 ret = __nfs4_get_fd(f, O_RDONLY);
500 }
501 spin_unlock(&f->fi_lock);
502 return ret;
503}
504
505static atomic_long_t num_delegations;
506unsigned long max_delegations;
507
508
509
510
511
512
513#define OWNER_HASH_BITS 8
514#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
515#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
516
517static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
518{
519 unsigned int ret;
520
521 ret = opaque_hashval(ownername->data, ownername->len);
522 return ret & OWNER_HASH_MASK;
523}
524
525
526#define FILE_HASH_BITS 8
527#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
528
529static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
530{
531 return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
532}
533
534static unsigned int file_hashval(struct knfsd_fh *fh)
535{
536 return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
537}
538
539static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
540
541static void
542__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
543{
544 lockdep_assert_held(&fp->fi_lock);
545
546 if (access & NFS4_SHARE_ACCESS_WRITE)
547 atomic_inc(&fp->fi_access[O_WRONLY]);
548 if (access & NFS4_SHARE_ACCESS_READ)
549 atomic_inc(&fp->fi_access[O_RDONLY]);
550}
551
552static __be32
553nfs4_file_get_access(struct nfs4_file *fp, u32 access)
554{
555 lockdep_assert_held(&fp->fi_lock);
556
557
558 if (access & ~NFS4_SHARE_ACCESS_BOTH)
559 return nfserr_inval;
560
561
562 if ((access & fp->fi_share_deny) != 0)
563 return nfserr_share_denied;
564
565 __nfs4_file_get_access(fp, access);
566 return nfs_ok;
567}
568
569static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
570{
571
572 if (deny) {
573
574 if (deny & ~NFS4_SHARE_DENY_BOTH)
575 return nfserr_inval;
576
577 if ((deny & NFS4_SHARE_DENY_READ) &&
578 atomic_read(&fp->fi_access[O_RDONLY]))
579 return nfserr_share_denied;
580
581 if ((deny & NFS4_SHARE_DENY_WRITE) &&
582 atomic_read(&fp->fi_access[O_WRONLY]))
583 return nfserr_share_denied;
584 }
585 return nfs_ok;
586}
587
588static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
589{
590 might_lock(&fp->fi_lock);
591
592 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
593 struct file *f1 = NULL;
594 struct file *f2 = NULL;
595
596 swap(f1, fp->fi_fds[oflag]);
597 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
598 swap(f2, fp->fi_fds[O_RDWR]);
599 spin_unlock(&fp->fi_lock);
600 if (f1)
601 fput(f1);
602 if (f2)
603 fput(f2);
604 }
605}
606
607static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
608{
609 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
610
611 if (access & NFS4_SHARE_ACCESS_WRITE)
612 __nfs4_file_put_access(fp, O_WRONLY);
613 if (access & NFS4_SHARE_ACCESS_READ)
614 __nfs4_file_put_access(fp, O_RDONLY);
615}
616
617
618
619
620
621
622
623
624static struct nfs4_clnt_odstate *
625alloc_clnt_odstate(struct nfs4_client *clp)
626{
627 struct nfs4_clnt_odstate *co;
628
629 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
630 if (co) {
631 co->co_client = clp;
632 refcount_set(&co->co_odcount, 1);
633 }
634 return co;
635}
636
637static void
638hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
639{
640 struct nfs4_file *fp = co->co_file;
641
642 lockdep_assert_held(&fp->fi_lock);
643 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
644}
645
646static inline void
647get_clnt_odstate(struct nfs4_clnt_odstate *co)
648{
649 if (co)
650 refcount_inc(&co->co_odcount);
651}
652
653static void
654put_clnt_odstate(struct nfs4_clnt_odstate *co)
655{
656 struct nfs4_file *fp;
657
658 if (!co)
659 return;
660
661 fp = co->co_file;
662 if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
663 list_del(&co->co_perfile);
664 spin_unlock(&fp->fi_lock);
665
666 nfsd4_return_all_file_layouts(co->co_client, fp);
667 kmem_cache_free(odstate_slab, co);
668 }
669}
670
671static struct nfs4_clnt_odstate *
672find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
673{
674 struct nfs4_clnt_odstate *co;
675 struct nfs4_client *cl;
676
677 if (!new)
678 return NULL;
679
680 cl = new->co_client;
681
682 spin_lock(&fp->fi_lock);
683 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
684 if (co->co_client == cl) {
685 get_clnt_odstate(co);
686 goto out;
687 }
688 }
689 co = new;
690 co->co_file = fp;
691 hash_clnt_odstate_locked(new);
692out:
693 spin_unlock(&fp->fi_lock);
694 return co;
695}
696
697struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
698 void (*sc_free)(struct nfs4_stid *))
699{
700 struct nfs4_stid *stid;
701 int new_id;
702
703 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
704 if (!stid)
705 return NULL;
706
707 idr_preload(GFP_KERNEL);
708 spin_lock(&cl->cl_lock);
709
710 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);
711 spin_unlock(&cl->cl_lock);
712 idr_preload_end();
713 if (new_id < 0)
714 goto out_free;
715
716 stid->sc_free = sc_free;
717 stid->sc_client = cl;
718 stid->sc_stateid.si_opaque.so_id = new_id;
719 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
720
721 refcount_set(&stid->sc_count, 1);
722 spin_lock_init(&stid->sc_lock);
723
724
725
726
727
728
729
730
731
732
733 return stid;
734out_free:
735 kmem_cache_free(slab, stid);
736 return NULL;
737}
738
739
740
741
742int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy)
743{
744 int new_id;
745
746 idr_preload(GFP_KERNEL);
747 spin_lock(&nn->s2s_cp_lock);
748 new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, copy, 0, 0, GFP_NOWAIT);
749 spin_unlock(&nn->s2s_cp_lock);
750 idr_preload_end();
751 if (new_id < 0)
752 return 0;
753 copy->cp_stateid.si_opaque.so_id = new_id;
754 copy->cp_stateid.si_opaque.so_clid.cl_boot = nn->boot_time;
755 copy->cp_stateid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
756 return 1;
757}
758
759void nfs4_free_cp_state(struct nfsd4_copy *copy)
760{
761 struct nfsd_net *nn;
762
763 nn = net_generic(copy->cp_clp->net, nfsd_net_id);
764 spin_lock(&nn->s2s_cp_lock);
765 idr_remove(&nn->s2s_cp_stateids, copy->cp_stateid.si_opaque.so_id);
766 spin_unlock(&nn->s2s_cp_lock);
767}
768
769static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
770{
771 struct nfs4_stid *stid;
772
773 stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid);
774 if (!stid)
775 return NULL;
776
777 return openlockstateid(stid);
778}
779
780static void nfs4_free_deleg(struct nfs4_stid *stid)
781{
782 kmem_cache_free(deleg_slab, stid);
783 atomic_long_dec(&num_delegations);
784}
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804static DEFINE_SPINLOCK(blocked_delegations_lock);
805static struct bloom_pair {
806 int entries, old_entries;
807 time_t swap_time;
808 int new;
809 DECLARE_BITMAP(set[2], 256);
810} blocked_delegations;
811
812static int delegation_blocked(struct knfsd_fh *fh)
813{
814 u32 hash;
815 struct bloom_pair *bd = &blocked_delegations;
816
817 if (bd->entries == 0)
818 return 0;
819 if (seconds_since_boot() - bd->swap_time > 30) {
820 spin_lock(&blocked_delegations_lock);
821 if (seconds_since_boot() - bd->swap_time > 30) {
822 bd->entries -= bd->old_entries;
823 bd->old_entries = bd->entries;
824 memset(bd->set[bd->new], 0,
825 sizeof(bd->set[0]));
826 bd->new = 1-bd->new;
827 bd->swap_time = seconds_since_boot();
828 }
829 spin_unlock(&blocked_delegations_lock);
830 }
831 hash = jhash(&fh->fh_base, fh->fh_size, 0);
832 if (test_bit(hash&255, bd->set[0]) &&
833 test_bit((hash>>8)&255, bd->set[0]) &&
834 test_bit((hash>>16)&255, bd->set[0]))
835 return 1;
836
837 if (test_bit(hash&255, bd->set[1]) &&
838 test_bit((hash>>8)&255, bd->set[1]) &&
839 test_bit((hash>>16)&255, bd->set[1]))
840 return 1;
841
842 return 0;
843}
844
845static void block_delegations(struct knfsd_fh *fh)
846{
847 u32 hash;
848 struct bloom_pair *bd = &blocked_delegations;
849
850 hash = jhash(&fh->fh_base, fh->fh_size, 0);
851
852 spin_lock(&blocked_delegations_lock);
853 __set_bit(hash&255, bd->set[bd->new]);
854 __set_bit((hash>>8)&255, bd->set[bd->new]);
855 __set_bit((hash>>16)&255, bd->set[bd->new]);
856 if (bd->entries == 0)
857 bd->swap_time = seconds_since_boot();
858 bd->entries += 1;
859 spin_unlock(&blocked_delegations_lock);
860}
861
862static struct nfs4_delegation *
863alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
864 struct svc_fh *current_fh,
865 struct nfs4_clnt_odstate *odstate)
866{
867 struct nfs4_delegation *dp;
868 long n;
869
870 dprintk("NFSD alloc_init_deleg\n");
871 n = atomic_long_inc_return(&num_delegations);
872 if (n < 0 || n > max_delegations)
873 goto out_dec;
874 if (delegation_blocked(¤t_fh->fh_handle))
875 goto out_dec;
876 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg));
877 if (dp == NULL)
878 goto out_dec;
879
880
881
882
883
884
885 dp->dl_stid.sc_stateid.si_generation = 1;
886 INIT_LIST_HEAD(&dp->dl_perfile);
887 INIT_LIST_HEAD(&dp->dl_perclnt);
888 INIT_LIST_HEAD(&dp->dl_recall_lru);
889 dp->dl_clnt_odstate = odstate;
890 get_clnt_odstate(odstate);
891 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
892 dp->dl_retries = 1;
893 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
894 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
895 get_nfs4_file(fp);
896 dp->dl_stid.sc_file = fp;
897 return dp;
898out_dec:
899 atomic_long_dec(&num_delegations);
900 return NULL;
901}
902
903void
904nfs4_put_stid(struct nfs4_stid *s)
905{
906 struct nfs4_file *fp = s->sc_file;
907 struct nfs4_client *clp = s->sc_client;
908
909 might_lock(&clp->cl_lock);
910
911 if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
912 wake_up_all(&close_wq);
913 return;
914 }
915 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
916 spin_unlock(&clp->cl_lock);
917 s->sc_free(s);
918 if (fp)
919 put_nfs4_file(fp);
920}
921
922void
923nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
924{
925 stateid_t *src = &stid->sc_stateid;
926
927 spin_lock(&stid->sc_lock);
928 if (unlikely(++src->si_generation == 0))
929 src->si_generation = 1;
930 memcpy(dst, src, sizeof(*dst));
931 spin_unlock(&stid->sc_lock);
932}
933
934static void put_deleg_file(struct nfs4_file *fp)
935{
936 struct file *filp = NULL;
937
938 spin_lock(&fp->fi_lock);
939 if (--fp->fi_delegees == 0)
940 swap(filp, fp->fi_deleg_file);
941 spin_unlock(&fp->fi_lock);
942
943 if (filp)
944 fput(filp);
945}
946
947static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp)
948{
949 struct nfs4_file *fp = dp->dl_stid.sc_file;
950 struct file *filp = fp->fi_deleg_file;
951
952 WARN_ON_ONCE(!fp->fi_delegees);
953
954 vfs_setlease(filp, F_UNLCK, NULL, (void **)&dp);
955 put_deleg_file(fp);
956}
957
958static void destroy_unhashed_deleg(struct nfs4_delegation *dp)
959{
960 put_clnt_odstate(dp->dl_clnt_odstate);
961 nfs4_unlock_deleg_lease(dp);
962 nfs4_put_stid(&dp->dl_stid);
963}
964
965void nfs4_unhash_stid(struct nfs4_stid *s)
966{
967 s->sc_type = 0;
968}
969
970
971
972
973
974
975
976
977
978
979static bool
980nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp)
981{
982 struct nfs4_delegation *searchdp = NULL;
983 struct nfs4_client *searchclp = NULL;
984
985 lockdep_assert_held(&state_lock);
986 lockdep_assert_held(&fp->fi_lock);
987
988 list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {
989 searchclp = searchdp->dl_stid.sc_client;
990 if (clp == searchclp) {
991 return true;
992 }
993 }
994 return false;
995}
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010static int
1011hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
1012{
1013 struct nfs4_client *clp = dp->dl_stid.sc_client;
1014
1015 lockdep_assert_held(&state_lock);
1016 lockdep_assert_held(&fp->fi_lock);
1017
1018 if (nfs4_delegation_exists(clp, fp))
1019 return -EAGAIN;
1020 refcount_inc(&dp->dl_stid.sc_count);
1021 dp->dl_stid.sc_type = NFS4_DELEG_STID;
1022 list_add(&dp->dl_perfile, &fp->fi_delegations);
1023 list_add(&dp->dl_perclnt, &clp->cl_delegations);
1024 return 0;
1025}
1026
1027static bool
1028unhash_delegation_locked(struct nfs4_delegation *dp)
1029{
1030 struct nfs4_file *fp = dp->dl_stid.sc_file;
1031
1032 lockdep_assert_held(&state_lock);
1033
1034 if (list_empty(&dp->dl_perfile))
1035 return false;
1036
1037 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
1038
1039 ++dp->dl_time;
1040 spin_lock(&fp->fi_lock);
1041 list_del_init(&dp->dl_perclnt);
1042 list_del_init(&dp->dl_recall_lru);
1043 list_del_init(&dp->dl_perfile);
1044 spin_unlock(&fp->fi_lock);
1045 return true;
1046}
1047
1048static void destroy_delegation(struct nfs4_delegation *dp)
1049{
1050 bool unhashed;
1051
1052 spin_lock(&state_lock);
1053 unhashed = unhash_delegation_locked(dp);
1054 spin_unlock(&state_lock);
1055 if (unhashed)
1056 destroy_unhashed_deleg(dp);
1057}
1058
1059static void revoke_delegation(struct nfs4_delegation *dp)
1060{
1061 struct nfs4_client *clp = dp->dl_stid.sc_client;
1062
1063 WARN_ON(!list_empty(&dp->dl_recall_lru));
1064
1065 if (clp->cl_minorversion) {
1066 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
1067 refcount_inc(&dp->dl_stid.sc_count);
1068 spin_lock(&clp->cl_lock);
1069 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
1070 spin_unlock(&clp->cl_lock);
1071 }
1072 destroy_unhashed_deleg(dp);
1073}
1074
1075
1076
1077
1078
1079static unsigned int clientid_hashval(u32 id)
1080{
1081 return id & CLIENT_HASH_MASK;
1082}
1083
1084static unsigned int clientstr_hashval(struct xdr_netobj name)
1085{
1086 return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK;
1087}
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107static unsigned int
1108bmap_to_share_mode(unsigned long bmap) {
1109 int i;
1110 unsigned int access = 0;
1111
1112 for (i = 1; i < 4; i++) {
1113 if (test_bit(i, &bmap))
1114 access |= i;
1115 }
1116 return access;
1117}
1118
1119
1120static inline void
1121set_access(u32 access, struct nfs4_ol_stateid *stp)
1122{
1123 unsigned char mask = 1 << access;
1124
1125 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1126 stp->st_access_bmap |= mask;
1127}
1128
1129
1130static inline void
1131clear_access(u32 access, struct nfs4_ol_stateid *stp)
1132{
1133 unsigned char mask = 1 << access;
1134
1135 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1136 stp->st_access_bmap &= ~mask;
1137}
1138
1139
1140static inline bool
1141test_access(u32 access, struct nfs4_ol_stateid *stp)
1142{
1143 unsigned char mask = 1 << access;
1144
1145 return (bool)(stp->st_access_bmap & mask);
1146}
1147
1148
1149static inline void
1150set_deny(u32 deny, struct nfs4_ol_stateid *stp)
1151{
1152 unsigned char mask = 1 << deny;
1153
1154 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1155 stp->st_deny_bmap |= mask;
1156}
1157
1158
1159static inline void
1160clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
1161{
1162 unsigned char mask = 1 << deny;
1163
1164 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1165 stp->st_deny_bmap &= ~mask;
1166}
1167
1168
1169static inline bool
1170test_deny(u32 deny, struct nfs4_ol_stateid *stp)
1171{
1172 unsigned char mask = 1 << deny;
1173
1174 return (bool)(stp->st_deny_bmap & mask);
1175}
1176
1177static int nfs4_access_to_omode(u32 access)
1178{
1179 switch (access & NFS4_SHARE_ACCESS_BOTH) {
1180 case NFS4_SHARE_ACCESS_READ:
1181 return O_RDONLY;
1182 case NFS4_SHARE_ACCESS_WRITE:
1183 return O_WRONLY;
1184 case NFS4_SHARE_ACCESS_BOTH:
1185 return O_RDWR;
1186 }
1187 WARN_ON_ONCE(1);
1188 return O_RDONLY;
1189}
1190
1191
1192
1193
1194
1195static void
1196recalculate_deny_mode(struct nfs4_file *fp)
1197{
1198 struct nfs4_ol_stateid *stp;
1199
1200 spin_lock(&fp->fi_lock);
1201 fp->fi_share_deny = 0;
1202 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
1203 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
1204 spin_unlock(&fp->fi_lock);
1205}
1206
1207static void
1208reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
1209{
1210 int i;
1211 bool change = false;
1212
1213 for (i = 1; i < 4; i++) {
1214 if ((i & deny) != i) {
1215 change = true;
1216 clear_deny(i, stp);
1217 }
1218 }
1219
1220
1221 if (change)
1222 recalculate_deny_mode(stp->st_stid.sc_file);
1223}
1224
1225
1226static void
1227release_all_access(struct nfs4_ol_stateid *stp)
1228{
1229 int i;
1230 struct nfs4_file *fp = stp->st_stid.sc_file;
1231
1232 if (fp && stp->st_deny_bmap != 0)
1233 recalculate_deny_mode(fp);
1234
1235 for (i = 1; i < 4; i++) {
1236 if (test_access(i, stp))
1237 nfs4_file_put_access(stp->st_stid.sc_file, i);
1238 clear_access(i, stp);
1239 }
1240}
1241
1242static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
1243{
1244 kfree(sop->so_owner.data);
1245 sop->so_ops->so_free(sop);
1246}
1247
1248static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
1249{
1250 struct nfs4_client *clp = sop->so_client;
1251
1252 might_lock(&clp->cl_lock);
1253
1254 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
1255 return;
1256 sop->so_ops->so_unhash(sop);
1257 spin_unlock(&clp->cl_lock);
1258 nfs4_free_stateowner(sop);
1259}
1260
1261static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
1262{
1263 struct nfs4_file *fp = stp->st_stid.sc_file;
1264
1265 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1266
1267 if (list_empty(&stp->st_perfile))
1268 return false;
1269
1270 spin_lock(&fp->fi_lock);
1271 list_del_init(&stp->st_perfile);
1272 spin_unlock(&fp->fi_lock);
1273 list_del(&stp->st_perstateowner);
1274 return true;
1275}
1276
1277static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
1278{
1279 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1280
1281 put_clnt_odstate(stp->st_clnt_odstate);
1282 release_all_access(stp);
1283 if (stp->st_stateowner)
1284 nfs4_put_stateowner(stp->st_stateowner);
1285 kmem_cache_free(stateid_slab, stid);
1286}
1287
1288static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
1289{
1290 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1291 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
1292 struct file *file;
1293
1294 file = find_any_file(stp->st_stid.sc_file);
1295 if (file)
1296 filp_close(file, (fl_owner_t)lo);
1297 nfs4_free_ol_stateid(stid);
1298}
1299
1300
1301
1302
1303
1304
1305static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1306 struct list_head *reaplist)
1307{
1308 struct nfs4_stid *s = &stp->st_stid;
1309 struct nfs4_client *clp = s->sc_client;
1310
1311 lockdep_assert_held(&clp->cl_lock);
1312
1313 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1314
1315 if (!refcount_dec_and_test(&s->sc_count)) {
1316 wake_up_all(&close_wq);
1317 return;
1318 }
1319
1320 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1321 list_add(&stp->st_locks, reaplist);
1322}
1323
1324static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
1325{
1326 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1327
1328 list_del_init(&stp->st_locks);
1329 nfs4_unhash_stid(&stp->st_stid);
1330 return unhash_ol_stateid(stp);
1331}
1332
1333static void release_lock_stateid(struct nfs4_ol_stateid *stp)
1334{
1335 struct nfs4_client *clp = stp->st_stid.sc_client;
1336 bool unhashed;
1337
1338 spin_lock(&clp->cl_lock);
1339 unhashed = unhash_lock_stateid(stp);
1340 spin_unlock(&clp->cl_lock);
1341 if (unhashed)
1342 nfs4_put_stid(&stp->st_stid);
1343}
1344
1345static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
1346{
1347 struct nfs4_client *clp = lo->lo_owner.so_client;
1348
1349 lockdep_assert_held(&clp->cl_lock);
1350
1351 list_del_init(&lo->lo_owner.so_strhash);
1352}
1353
1354
1355
1356
1357
1358static void
1359free_ol_stateid_reaplist(struct list_head *reaplist)
1360{
1361 struct nfs4_ol_stateid *stp;
1362 struct nfs4_file *fp;
1363
1364 might_sleep();
1365
1366 while (!list_empty(reaplist)) {
1367 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1368 st_locks);
1369 list_del(&stp->st_locks);
1370 fp = stp->st_stid.sc_file;
1371 stp->st_stid.sc_free(&stp->st_stid);
1372 if (fp)
1373 put_nfs4_file(fp);
1374 }
1375}
1376
1377static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1378 struct list_head *reaplist)
1379{
1380 struct nfs4_ol_stateid *stp;
1381
1382 lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);
1383
1384 while (!list_empty(&open_stp->st_locks)) {
1385 stp = list_entry(open_stp->st_locks.next,
1386 struct nfs4_ol_stateid, st_locks);
1387 WARN_ON(!unhash_lock_stateid(stp));
1388 put_ol_stateid_locked(stp, reaplist);
1389 }
1390}
1391
1392static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
1393 struct list_head *reaplist)
1394{
1395 bool unhashed;
1396
1397 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1398
1399 unhashed = unhash_ol_stateid(stp);
1400 release_open_stateid_locks(stp, reaplist);
1401 return unhashed;
1402}
1403
1404static void release_open_stateid(struct nfs4_ol_stateid *stp)
1405{
1406 LIST_HEAD(reaplist);
1407
1408 spin_lock(&stp->st_stid.sc_client->cl_lock);
1409 if (unhash_open_stateid(stp, &reaplist))
1410 put_ol_stateid_locked(stp, &reaplist);
1411 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1412 free_ol_stateid_reaplist(&reaplist);
1413}
1414
1415static void unhash_openowner_locked(struct nfs4_openowner *oo)
1416{
1417 struct nfs4_client *clp = oo->oo_owner.so_client;
1418
1419 lockdep_assert_held(&clp->cl_lock);
1420
1421 list_del_init(&oo->oo_owner.so_strhash);
1422 list_del_init(&oo->oo_perclient);
1423}
1424
1425static void release_last_closed_stateid(struct nfs4_openowner *oo)
1426{
1427 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1428 nfsd_net_id);
1429 struct nfs4_ol_stateid *s;
1430
1431 spin_lock(&nn->client_lock);
1432 s = oo->oo_last_closed_stid;
1433 if (s) {
1434 list_del_init(&oo->oo_close_lru);
1435 oo->oo_last_closed_stid = NULL;
1436 }
1437 spin_unlock(&nn->client_lock);
1438 if (s)
1439 nfs4_put_stid(&s->st_stid);
1440}
1441
1442static void release_openowner(struct nfs4_openowner *oo)
1443{
1444 struct nfs4_ol_stateid *stp;
1445 struct nfs4_client *clp = oo->oo_owner.so_client;
1446 struct list_head reaplist;
1447
1448 INIT_LIST_HEAD(&reaplist);
1449
1450 spin_lock(&clp->cl_lock);
1451 unhash_openowner_locked(oo);
1452 while (!list_empty(&oo->oo_owner.so_stateids)) {
1453 stp = list_first_entry(&oo->oo_owner.so_stateids,
1454 struct nfs4_ol_stateid, st_perstateowner);
1455 if (unhash_open_stateid(stp, &reaplist))
1456 put_ol_stateid_locked(stp, &reaplist);
1457 }
1458 spin_unlock(&clp->cl_lock);
1459 free_ol_stateid_reaplist(&reaplist);
1460 release_last_closed_stateid(oo);
1461 nfs4_put_stateowner(&oo->oo_owner);
1462}
1463
1464static inline int
1465hash_sessionid(struct nfs4_sessionid *sessionid)
1466{
1467 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1468
1469 return sid->sequence % SESSION_HASH_SIZE;
1470}
1471
1472#ifdef CONFIG_SUNRPC_DEBUG
1473static inline void
1474dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1475{
1476 u32 *ptr = (u32 *)(&sessionid->data[0]);
1477 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1478}
1479#else
1480static inline void
1481dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1482{
1483}
1484#endif
1485
1486
1487
1488
1489
1490void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1491{
1492 struct nfs4_stateowner *so = cstate->replay_owner;
1493
1494 if (nfserr == nfserr_replay_me)
1495 return;
1496
1497 if (!seqid_mutating_err(ntohl(nfserr))) {
1498 nfsd4_cstate_clear_replay(cstate);
1499 return;
1500 }
1501 if (!so)
1502 return;
1503 if (so->so_is_open_owner)
1504 release_last_closed_stateid(openowner(so));
1505 so->so_seqid++;
1506 return;
1507}
1508
1509static void
1510gen_sessionid(struct nfsd4_session *ses)
1511{
1512 struct nfs4_client *clp = ses->se_client;
1513 struct nfsd4_sessionid *sid;
1514
1515 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1516 sid->clientid = clp->cl_clientid;
1517 sid->sequence = current_sessionid++;
1518 sid->reserved = 0;
1519}
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1534
1535static void
1536free_session_slots(struct nfsd4_session *ses)
1537{
1538 int i;
1539
1540 for (i = 0; i < ses->se_fchannel.maxreqs; i++) {
1541 free_svc_cred(&ses->se_slots[i]->sl_cred);
1542 kfree(ses->se_slots[i]);
1543 }
1544}
1545
1546
1547
1548
1549
1550static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1551{
1552 u32 size;
1553
1554 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1555 size = 0;
1556 else
1557 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1558 return size + sizeof(struct nfsd4_slot);
1559}
1560
1561
1562
1563
1564
1565
1566static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
1567{
1568 u32 slotsize = slot_bytes(ca);
1569 u32 num = ca->maxreqs;
1570 unsigned long avail, total_avail;
1571
1572 spin_lock(&nfsd_drc_lock);
1573 total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;
1574 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail);
1575
1576
1577
1578
1579 avail = clamp_t(unsigned long, avail, slotsize, total_avail/3);
1580 num = min_t(int, num, avail / slotsize);
1581 nfsd_drc_mem_used += num * slotsize;
1582 spin_unlock(&nfsd_drc_lock);
1583
1584 return num;
1585}
1586
1587static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1588{
1589 int slotsize = slot_bytes(ca);
1590
1591 spin_lock(&nfsd_drc_lock);
1592 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1593 spin_unlock(&nfsd_drc_lock);
1594}
1595
1596static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1597 struct nfsd4_channel_attrs *battrs)
1598{
1599 int numslots = fattrs->maxreqs;
1600 int slotsize = slot_bytes(fattrs);
1601 struct nfsd4_session *new;
1602 int mem, i;
1603
1604 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1605 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1606 mem = numslots * sizeof(struct nfsd4_slot *);
1607
1608 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1609 if (!new)
1610 return NULL;
1611
1612 for (i = 0; i < numslots; i++) {
1613 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1614 if (!new->se_slots[i])
1615 goto out_free;
1616 }
1617
1618 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1619 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1620
1621 return new;
1622out_free:
1623 while (i--)
1624 kfree(new->se_slots[i]);
1625 kfree(new);
1626 return NULL;
1627}
1628
1629static void free_conn(struct nfsd4_conn *c)
1630{
1631 svc_xprt_put(c->cn_xprt);
1632 kfree(c);
1633}
1634
1635static void nfsd4_conn_lost(struct svc_xpt_user *u)
1636{
1637 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1638 struct nfs4_client *clp = c->cn_session->se_client;
1639
1640 spin_lock(&clp->cl_lock);
1641 if (!list_empty(&c->cn_persession)) {
1642 list_del(&c->cn_persession);
1643 free_conn(c);
1644 }
1645 nfsd4_probe_callback(clp);
1646 spin_unlock(&clp->cl_lock);
1647}
1648
1649static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1650{
1651 struct nfsd4_conn *conn;
1652
1653 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1654 if (!conn)
1655 return NULL;
1656 svc_xprt_get(rqstp->rq_xprt);
1657 conn->cn_xprt = rqstp->rq_xprt;
1658 conn->cn_flags = flags;
1659 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1660 return conn;
1661}
1662
1663static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1664{
1665 conn->cn_session = ses;
1666 list_add(&conn->cn_persession, &ses->se_conns);
1667}
1668
1669static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1670{
1671 struct nfs4_client *clp = ses->se_client;
1672
1673 spin_lock(&clp->cl_lock);
1674 __nfsd4_hash_conn(conn, ses);
1675 spin_unlock(&clp->cl_lock);
1676}
1677
1678static int nfsd4_register_conn(struct nfsd4_conn *conn)
1679{
1680 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1681 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1682}
1683
1684static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1685{
1686 int ret;
1687
1688 nfsd4_hash_conn(conn, ses);
1689 ret = nfsd4_register_conn(conn);
1690 if (ret)
1691
1692 nfsd4_conn_lost(&conn->cn_xpt_user);
1693
1694 nfsd4_probe_callback_sync(ses->se_client);
1695}
1696
1697static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1698{
1699 u32 dir = NFS4_CDFC4_FORE;
1700
1701 if (cses->flags & SESSION4_BACK_CHAN)
1702 dir |= NFS4_CDFC4_BACK;
1703 return alloc_conn(rqstp, dir);
1704}
1705
1706
1707static void nfsd4_del_conns(struct nfsd4_session *s)
1708{
1709 struct nfs4_client *clp = s->se_client;
1710 struct nfsd4_conn *c;
1711
1712 spin_lock(&clp->cl_lock);
1713 while (!list_empty(&s->se_conns)) {
1714 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1715 list_del_init(&c->cn_persession);
1716 spin_unlock(&clp->cl_lock);
1717
1718 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1719 free_conn(c);
1720
1721 spin_lock(&clp->cl_lock);
1722 }
1723 spin_unlock(&clp->cl_lock);
1724}
1725
1726static void __free_session(struct nfsd4_session *ses)
1727{
1728 free_session_slots(ses);
1729 kfree(ses);
1730}
1731
1732static void free_session(struct nfsd4_session *ses)
1733{
1734 nfsd4_del_conns(ses);
1735 nfsd4_put_drc_mem(&ses->se_fchannel);
1736 __free_session(ses);
1737}
1738
1739static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1740{
1741 int idx;
1742 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1743
1744 new->se_client = clp;
1745 gen_sessionid(new);
1746
1747 INIT_LIST_HEAD(&new->se_conns);
1748
1749 new->se_cb_seq_nr = 1;
1750 new->se_flags = cses->flags;
1751 new->se_cb_prog = cses->callback_prog;
1752 new->se_cb_sec = cses->cb_sec;
1753 atomic_set(&new->se_ref, 0);
1754 idx = hash_sessionid(&new->se_sessionid);
1755 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1756 spin_lock(&clp->cl_lock);
1757 list_add(&new->se_perclnt, &clp->cl_sessions);
1758 spin_unlock(&clp->cl_lock);
1759
1760 {
1761 struct sockaddr *sa = svc_addr(rqstp);
1762
1763
1764
1765
1766
1767
1768
1769 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1770 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1771 }
1772}
1773
1774
1775static struct nfsd4_session *
1776__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1777{
1778 struct nfsd4_session *elem;
1779 int idx;
1780 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1781
1782 lockdep_assert_held(&nn->client_lock);
1783
1784 dump_sessionid(__func__, sessionid);
1785 idx = hash_sessionid(sessionid);
1786
1787 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1788 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1789 NFS4_MAX_SESSIONID_LEN)) {
1790 return elem;
1791 }
1792 }
1793
1794 dprintk("%s: session not found\n", __func__);
1795 return NULL;
1796}
1797
1798static struct nfsd4_session *
1799find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1800 __be32 *ret)
1801{
1802 struct nfsd4_session *session;
1803 __be32 status = nfserr_badsession;
1804
1805 session = __find_in_sessionid_hashtbl(sessionid, net);
1806 if (!session)
1807 goto out;
1808 status = nfsd4_get_session_locked(session);
1809 if (status)
1810 session = NULL;
1811out:
1812 *ret = status;
1813 return session;
1814}
1815
1816
1817static void
1818unhash_session(struct nfsd4_session *ses)
1819{
1820 struct nfs4_client *clp = ses->se_client;
1821 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1822
1823 lockdep_assert_held(&nn->client_lock);
1824
1825 list_del(&ses->se_hash);
1826 spin_lock(&ses->se_client->cl_lock);
1827 list_del(&ses->se_perclnt);
1828 spin_unlock(&ses->se_client->cl_lock);
1829}
1830
1831
1832static int
1833STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1834{
1835
1836
1837
1838
1839
1840 if (clid->cl_boot == (u32)nn->boot_time)
1841 return 0;
1842 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1843 clid->cl_boot, clid->cl_id, nn->boot_time);
1844 return 1;
1845}
1846
1847
1848
1849
1850
1851
1852static struct nfs4_client *alloc_client(struct xdr_netobj name)
1853{
1854 struct nfs4_client *clp;
1855 int i;
1856
1857 clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
1858 if (clp == NULL)
1859 return NULL;
1860 xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);
1861 if (clp->cl_name.data == NULL)
1862 goto err_no_name;
1863 clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,
1864 sizeof(struct list_head),
1865 GFP_KERNEL);
1866 if (!clp->cl_ownerstr_hashtbl)
1867 goto err_no_hashtbl;
1868 for (i = 0; i < OWNER_HASH_SIZE; i++)
1869 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
1870 INIT_LIST_HEAD(&clp->cl_sessions);
1871 idr_init(&clp->cl_stateids);
1872 atomic_set(&clp->cl_rpc_users, 0);
1873 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1874 INIT_LIST_HEAD(&clp->cl_idhash);
1875 INIT_LIST_HEAD(&clp->cl_openowners);
1876 INIT_LIST_HEAD(&clp->cl_delegations);
1877 INIT_LIST_HEAD(&clp->cl_lru);
1878 INIT_LIST_HEAD(&clp->cl_revoked);
1879#ifdef CONFIG_NFSD_PNFS
1880 INIT_LIST_HEAD(&clp->cl_lo_states);
1881#endif
1882 INIT_LIST_HEAD(&clp->async_copies);
1883 spin_lock_init(&clp->async_lock);
1884 spin_lock_init(&clp->cl_lock);
1885 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1886 return clp;
1887err_no_hashtbl:
1888 kfree(clp->cl_name.data);
1889err_no_name:
1890 kmem_cache_free(client_slab, clp);
1891 return NULL;
1892}
1893
1894static void __free_client(struct kref *k)
1895{
1896 struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref);
1897 struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs);
1898
1899 free_svc_cred(&clp->cl_cred);
1900 kfree(clp->cl_ownerstr_hashtbl);
1901 kfree(clp->cl_name.data);
1902 kfree(clp->cl_nii_domain.data);
1903 kfree(clp->cl_nii_name.data);
1904 idr_destroy(&clp->cl_stateids);
1905 kmem_cache_free(client_slab, clp);
1906}
1907
1908static void drop_client(struct nfs4_client *clp)
1909{
1910 kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);
1911}
1912
1913static void
1914free_client(struct nfs4_client *clp)
1915{
1916 while (!list_empty(&clp->cl_sessions)) {
1917 struct nfsd4_session *ses;
1918 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1919 se_perclnt);
1920 list_del(&ses->se_perclnt);
1921 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1922 free_session(ses);
1923 }
1924 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1925 if (clp->cl_nfsd_dentry) {
1926 nfsd_client_rmdir(clp->cl_nfsd_dentry);
1927 clp->cl_nfsd_dentry = NULL;
1928 wake_up_all(&expiry_wq);
1929 }
1930 drop_client(clp);
1931}
1932
1933
1934static void
1935unhash_client_locked(struct nfs4_client *clp)
1936{
1937 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1938 struct nfsd4_session *ses;
1939
1940 lockdep_assert_held(&nn->client_lock);
1941
1942
1943 clp->cl_time = 0;
1944
1945 if (!list_empty(&clp->cl_idhash)) {
1946 list_del_init(&clp->cl_idhash);
1947 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1948 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1949 else
1950 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1951 }
1952 list_del_init(&clp->cl_lru);
1953 spin_lock(&clp->cl_lock);
1954 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1955 list_del_init(&ses->se_hash);
1956 spin_unlock(&clp->cl_lock);
1957}
1958
1959static void
1960unhash_client(struct nfs4_client *clp)
1961{
1962 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1963
1964 spin_lock(&nn->client_lock);
1965 unhash_client_locked(clp);
1966 spin_unlock(&nn->client_lock);
1967}
1968
1969static __be32 mark_client_expired_locked(struct nfs4_client *clp)
1970{
1971 if (atomic_read(&clp->cl_rpc_users))
1972 return nfserr_jukebox;
1973 unhash_client_locked(clp);
1974 return nfs_ok;
1975}
1976
1977static void
1978__destroy_client(struct nfs4_client *clp)
1979{
1980 int i;
1981 struct nfs4_openowner *oo;
1982 struct nfs4_delegation *dp;
1983 struct list_head reaplist;
1984
1985 INIT_LIST_HEAD(&reaplist);
1986 spin_lock(&state_lock);
1987 while (!list_empty(&clp->cl_delegations)) {
1988 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1989 WARN_ON(!unhash_delegation_locked(dp));
1990 list_add(&dp->dl_recall_lru, &reaplist);
1991 }
1992 spin_unlock(&state_lock);
1993 while (!list_empty(&reaplist)) {
1994 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1995 list_del_init(&dp->dl_recall_lru);
1996 destroy_unhashed_deleg(dp);
1997 }
1998 while (!list_empty(&clp->cl_revoked)) {
1999 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
2000 list_del_init(&dp->dl_recall_lru);
2001 nfs4_put_stid(&dp->dl_stid);
2002 }
2003 while (!list_empty(&clp->cl_openowners)) {
2004 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
2005 nfs4_get_stateowner(&oo->oo_owner);
2006 release_openowner(oo);
2007 }
2008 for (i = 0; i < OWNER_HASH_SIZE; i++) {
2009 struct nfs4_stateowner *so, *tmp;
2010
2011 list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],
2012 so_strhash) {
2013
2014 WARN_ON_ONCE(so->so_is_open_owner);
2015 remove_blocked_locks(lockowner(so));
2016 }
2017 }
2018 nfsd4_return_all_client_layouts(clp);
2019 nfsd4_shutdown_copy(clp);
2020 nfsd4_shutdown_callback(clp);
2021 if (clp->cl_cb_conn.cb_xprt)
2022 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
2023 free_client(clp);
2024 wake_up_all(&expiry_wq);
2025}
2026
2027static void
2028destroy_client(struct nfs4_client *clp)
2029{
2030 unhash_client(clp);
2031 __destroy_client(clp);
2032}
2033
2034static void inc_reclaim_complete(struct nfs4_client *clp)
2035{
2036 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2037
2038 if (!nn->track_reclaim_completes)
2039 return;
2040 if (!nfsd4_find_reclaim_client(clp->cl_name, nn))
2041 return;
2042 if (atomic_inc_return(&nn->nr_reclaim_complete) ==
2043 nn->reclaim_str_hashtbl_size) {
2044 printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n",
2045 clp->net->ns.inum);
2046 nfsd4_end_grace(nn);
2047 }
2048}
2049
2050static void expire_client(struct nfs4_client *clp)
2051{
2052 unhash_client(clp);
2053 nfsd4_client_record_remove(clp);
2054 __destroy_client(clp);
2055}
2056
2057static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
2058{
2059 memcpy(target->cl_verifier.data, source->data,
2060 sizeof(target->cl_verifier.data));
2061}
2062
2063static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
2064{
2065 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
2066 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
2067}
2068
2069static int copy_cred(struct svc_cred *target, struct svc_cred *source)
2070{
2071 target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);
2072 target->cr_raw_principal = kstrdup(source->cr_raw_principal,
2073 GFP_KERNEL);
2074 target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL);
2075 if ((source->cr_principal && !target->cr_principal) ||
2076 (source->cr_raw_principal && !target->cr_raw_principal) ||
2077 (source->cr_targ_princ && !target->cr_targ_princ))
2078 return -ENOMEM;
2079
2080 target->cr_flavor = source->cr_flavor;
2081 target->cr_uid = source->cr_uid;
2082 target->cr_gid = source->cr_gid;
2083 target->cr_group_info = source->cr_group_info;
2084 get_group_info(target->cr_group_info);
2085 target->cr_gss_mech = source->cr_gss_mech;
2086 if (source->cr_gss_mech)
2087 gss_mech_get(source->cr_gss_mech);
2088 return 0;
2089}
2090
2091static int
2092compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
2093{
2094 if (o1->len < o2->len)
2095 return -1;
2096 if (o1->len > o2->len)
2097 return 1;
2098 return memcmp(o1->data, o2->data, o1->len);
2099}
2100
2101static int
2102same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
2103{
2104 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
2105}
2106
2107static int
2108same_clid(clientid_t *cl1, clientid_t *cl2)
2109{
2110 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
2111}
2112
2113static bool groups_equal(struct group_info *g1, struct group_info *g2)
2114{
2115 int i;
2116
2117 if (g1->ngroups != g2->ngroups)
2118 return false;
2119 for (i=0; i<g1->ngroups; i++)
2120 if (!gid_eq(g1->gid[i], g2->gid[i]))
2121 return false;
2122 return true;
2123}
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134static bool is_gss_cred(struct svc_cred *cr)
2135{
2136
2137 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
2138}
2139
2140
2141static bool
2142same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
2143{
2144 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
2145 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
2146 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
2147 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
2148 return false;
2149
2150 if (cr1->cr_principal == cr2->cr_principal)
2151 return true;
2152 if (!cr1->cr_principal || !cr2->cr_principal)
2153 return false;
2154 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
2155}
2156
2157static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
2158{
2159 struct svc_cred *cr = &rqstp->rq_cred;
2160 u32 service;
2161
2162 if (!cr->cr_gss_mech)
2163 return false;
2164 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
2165 return service == RPC_GSS_SVC_INTEGRITY ||
2166 service == RPC_GSS_SVC_PRIVACY;
2167}
2168
2169bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
2170{
2171 struct svc_cred *cr = &rqstp->rq_cred;
2172
2173 if (!cl->cl_mach_cred)
2174 return true;
2175 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
2176 return false;
2177 if (!svc_rqst_integrity_protected(rqstp))
2178 return false;
2179 if (cl->cl_cred.cr_raw_principal)
2180 return 0 == strcmp(cl->cl_cred.cr_raw_principal,
2181 cr->cr_raw_principal);
2182 if (!cr->cr_principal)
2183 return false;
2184 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
2185}
2186
2187static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
2188{
2189 __be32 verf[2];
2190
2191
2192
2193
2194
2195 verf[0] = (__force __be32)get_seconds();
2196 verf[1] = (__force __be32)nn->clverifier_counter++;
2197 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
2198}
2199
2200static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
2201{
2202 clp->cl_clientid.cl_boot = nn->boot_time;
2203 clp->cl_clientid.cl_id = nn->clientid_counter++;
2204 gen_confirm(clp, nn);
2205}
2206
2207static struct nfs4_stid *
2208find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
2209{
2210 struct nfs4_stid *ret;
2211
2212 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
2213 if (!ret || !ret->sc_type)
2214 return NULL;
2215 return ret;
2216}
2217
2218static struct nfs4_stid *
2219find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
2220{
2221 struct nfs4_stid *s;
2222
2223 spin_lock(&cl->cl_lock);
2224 s = find_stateid_locked(cl, t);
2225 if (s != NULL) {
2226 if (typemask & s->sc_type)
2227 refcount_inc(&s->sc_count);
2228 else
2229 s = NULL;
2230 }
2231 spin_unlock(&cl->cl_lock);
2232 return s;
2233}
2234
2235static struct nfs4_client *get_nfsdfs_clp(struct inode *inode)
2236{
2237 struct nfsdfs_client *nc;
2238 nc = get_nfsdfs_client(inode);
2239 if (!nc)
2240 return NULL;
2241 return container_of(nc, struct nfs4_client, cl_nfsdfs);
2242}
2243
2244static void seq_quote_mem(struct seq_file *m, char *data, int len)
2245{
2246 seq_printf(m, "\"");
2247 seq_escape_mem_ascii(m, data, len);
2248 seq_printf(m, "\"");
2249}
2250
2251static int client_info_show(struct seq_file *m, void *v)
2252{
2253 struct inode *inode = m->private;
2254 struct nfs4_client *clp;
2255 u64 clid;
2256
2257 clp = get_nfsdfs_clp(inode);
2258 if (!clp)
2259 return -ENXIO;
2260 memcpy(&clid, &clp->cl_clientid, sizeof(clid));
2261 seq_printf(m, "clientid: 0x%llx\n", clid);
2262 seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
2263 seq_printf(m, "name: ");
2264 seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
2265 seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
2266 if (clp->cl_nii_domain.data) {
2267 seq_printf(m, "Implementation domain: ");
2268 seq_quote_mem(m, clp->cl_nii_domain.data,
2269 clp->cl_nii_domain.len);
2270 seq_printf(m, "\nImplementation name: ");
2271 seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);
2272 seq_printf(m, "\nImplementation time: [%ld, %ld]\n",
2273 clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
2274 }
2275 drop_client(clp);
2276
2277 return 0;
2278}
2279
2280static int client_info_open(struct inode *inode, struct file *file)
2281{
2282 return single_open(file, client_info_show, inode);
2283}
2284
2285static const struct file_operations client_info_fops = {
2286 .open = client_info_open,
2287 .read = seq_read,
2288 .llseek = seq_lseek,
2289 .release = single_release,
2290};
2291
2292static void *states_start(struct seq_file *s, loff_t *pos)
2293 __acquires(&clp->cl_lock)
2294{
2295 struct nfs4_client *clp = s->private;
2296 unsigned long id = *pos;
2297 void *ret;
2298
2299 spin_lock(&clp->cl_lock);
2300 ret = idr_get_next_ul(&clp->cl_stateids, &id);
2301 *pos = id;
2302 return ret;
2303}
2304
2305static void *states_next(struct seq_file *s, void *v, loff_t *pos)
2306{
2307 struct nfs4_client *clp = s->private;
2308 unsigned long id = *pos;
2309 void *ret;
2310
2311 id = *pos;
2312 id++;
2313 ret = idr_get_next_ul(&clp->cl_stateids, &id);
2314 *pos = id;
2315 return ret;
2316}
2317
2318static void states_stop(struct seq_file *s, void *v)
2319 __releases(&clp->cl_lock)
2320{
2321 struct nfs4_client *clp = s->private;
2322
2323 spin_unlock(&clp->cl_lock);
2324}
2325
2326static void nfs4_show_superblock(struct seq_file *s, struct file *f)
2327{
2328 struct inode *inode = file_inode(f);
2329
2330 seq_printf(s, "superblock: \"%02x:%02x:%ld\"",
2331 MAJOR(inode->i_sb->s_dev),
2332 MINOR(inode->i_sb->s_dev),
2333 inode->i_ino);
2334}
2335
2336static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo)
2337{
2338 seq_printf(s, "owner: ");
2339 seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);
2340}
2341
2342static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st)
2343{
2344 struct nfs4_ol_stateid *ols;
2345 struct nfs4_file *nf;
2346 struct file *file;
2347 struct nfs4_stateowner *oo;
2348 unsigned int access, deny;
2349
2350 if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)
2351 return 0;
2352 ols = openlockstateid(st);
2353 oo = ols->st_stateowner;
2354 nf = st->sc_file;
2355 file = find_any_file(nf);
2356
2357 seq_printf(s, "- 0x%16phN: { type: open, ", &st->sc_stateid);
2358
2359 access = bmap_to_share_mode(ols->st_access_bmap);
2360 deny = bmap_to_share_mode(ols->st_deny_bmap);
2361
2362 seq_printf(s, "access: \%s\%s, ",
2363 access & NFS4_SHARE_ACCESS_READ ? "r" : "-",
2364 access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
2365 seq_printf(s, "deny: \%s\%s, ",
2366 deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",
2367 deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
2368
2369 nfs4_show_superblock(s, file);
2370 seq_printf(s, ", ");
2371 nfs4_show_owner(s, oo);
2372 seq_printf(s, " }\n");
2373 fput(file);
2374
2375 return 0;
2376}
2377
2378static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st)
2379{
2380 struct nfs4_ol_stateid *ols;
2381 struct nfs4_file *nf;
2382 struct file *file;
2383 struct nfs4_stateowner *oo;
2384
2385 ols = openlockstateid(st);
2386 oo = ols->st_stateowner;
2387 nf = st->sc_file;
2388 file = find_any_file(nf);
2389
2390 seq_printf(s, "- 0x%16phN: { type: lock, ", &st->sc_stateid);
2391
2392
2393
2394
2395
2396
2397
2398
2399 nfs4_show_superblock(s, file);
2400
2401 seq_printf(s, ", ");
2402 nfs4_show_owner(s, oo);
2403 seq_printf(s, " }\n");
2404 fput(file);
2405
2406 return 0;
2407}
2408
2409static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st)
2410{
2411 struct nfs4_delegation *ds;
2412 struct nfs4_file *nf;
2413 struct file *file;
2414
2415 ds = delegstateid(st);
2416 nf = st->sc_file;
2417 file = nf->fi_deleg_file;
2418
2419 seq_printf(s, "- 0x%16phN: { type: deleg, ", &st->sc_stateid);
2420
2421
2422 seq_printf(s, "access: %s, ",
2423 ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");
2424
2425
2426
2427 nfs4_show_superblock(s, file);
2428 seq_printf(s, " }\n");
2429
2430 return 0;
2431}
2432
2433static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st)
2434{
2435 struct nfs4_layout_stateid *ls;
2436 struct file *file;
2437
2438 ls = container_of(st, struct nfs4_layout_stateid, ls_stid);
2439 file = ls->ls_file;
2440
2441 seq_printf(s, "- 0x%16phN: { type: layout, ", &st->sc_stateid);
2442
2443
2444
2445 nfs4_show_superblock(s, file);
2446 seq_printf(s, " }\n");
2447
2448 return 0;
2449}
2450
2451static int states_show(struct seq_file *s, void *v)
2452{
2453 struct nfs4_stid *st = v;
2454
2455 switch (st->sc_type) {
2456 case NFS4_OPEN_STID:
2457 return nfs4_show_open(s, st);
2458 case NFS4_LOCK_STID:
2459 return nfs4_show_lock(s, st);
2460 case NFS4_DELEG_STID:
2461 return nfs4_show_deleg(s, st);
2462 case NFS4_LAYOUT_STID:
2463 return nfs4_show_layout(s, st);
2464 default:
2465 return 0;
2466 }
2467
2468}
2469
2470static struct seq_operations states_seq_ops = {
2471 .start = states_start,
2472 .next = states_next,
2473 .stop = states_stop,
2474 .show = states_show
2475};
2476
2477static int client_states_open(struct inode *inode, struct file *file)
2478{
2479 struct seq_file *s;
2480 struct nfs4_client *clp;
2481 int ret;
2482
2483 clp = get_nfsdfs_clp(inode);
2484 if (!clp)
2485 return -ENXIO;
2486
2487 ret = seq_open(file, &states_seq_ops);
2488 if (ret)
2489 return ret;
2490 s = file->private_data;
2491 s->private = clp;
2492 return 0;
2493}
2494
2495static int client_opens_release(struct inode *inode, struct file *file)
2496{
2497 struct seq_file *m = file->private_data;
2498 struct nfs4_client *clp = m->private;
2499
2500
2501 drop_client(clp);
2502 return 0;
2503}
2504
2505static const struct file_operations client_states_fops = {
2506 .open = client_states_open,
2507 .read = seq_read,
2508 .llseek = seq_lseek,
2509 .release = client_opens_release,
2510};
2511
2512
2513
2514
2515
2516
2517
2518static void force_expire_client(struct nfs4_client *clp)
2519{
2520 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2521 bool already_expired;
2522
2523 spin_lock(&clp->cl_lock);
2524 clp->cl_time = 0;
2525 spin_unlock(&clp->cl_lock);
2526
2527 wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);
2528 spin_lock(&nn->client_lock);
2529 already_expired = list_empty(&clp->cl_lru);
2530 if (!already_expired)
2531 unhash_client_locked(clp);
2532 spin_unlock(&nn->client_lock);
2533
2534 if (!already_expired)
2535 expire_client(clp);
2536 else
2537 wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);
2538}
2539
2540static ssize_t client_ctl_write(struct file *file, const char __user *buf,
2541 size_t size, loff_t *pos)
2542{
2543 char *data;
2544 struct nfs4_client *clp;
2545
2546 data = simple_transaction_get(file, buf, size);
2547 if (IS_ERR(data))
2548 return PTR_ERR(data);
2549 if (size != 7 || 0 != memcmp(data, "expire\n", 7))
2550 return -EINVAL;
2551 clp = get_nfsdfs_clp(file_inode(file));
2552 if (!clp)
2553 return -ENXIO;
2554 force_expire_client(clp);
2555 drop_client(clp);
2556 return 7;
2557}
2558
2559static const struct file_operations client_ctl_fops = {
2560 .write = client_ctl_write,
2561 .release = simple_transaction_release,
2562};
2563
2564static const struct tree_descr client_files[] = {
2565 [0] = {"info", &client_info_fops, S_IRUSR},
2566 [1] = {"states", &client_states_fops, S_IRUSR},
2567 [2] = {"ctl", &client_ctl_fops, S_IRUSR|S_IWUSR},
2568 [3] = {""},
2569};
2570
2571static struct nfs4_client *create_client(struct xdr_netobj name,
2572 struct svc_rqst *rqstp, nfs4_verifier *verf)
2573{
2574 struct nfs4_client *clp;
2575 struct sockaddr *sa = svc_addr(rqstp);
2576 int ret;
2577 struct net *net = SVC_NET(rqstp);
2578 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2579
2580 clp = alloc_client(name);
2581 if (clp == NULL)
2582 return NULL;
2583
2584 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
2585 if (ret) {
2586 free_client(clp);
2587 return NULL;
2588 }
2589 gen_clid(clp, nn);
2590 kref_init(&clp->cl_nfsdfs.cl_ref);
2591 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
2592 clp->cl_time = get_seconds();
2593 clear_bit(0, &clp->cl_cb_slot_busy);
2594 copy_verf(clp, verf);
2595 memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
2596 clp->cl_cb_session = NULL;
2597 clp->net = net;
2598 clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,
2599 clp->cl_clientid.cl_id - nn->clientid_base,
2600 client_files);
2601 if (!clp->cl_nfsd_dentry) {
2602 free_client(clp);
2603 return NULL;
2604 }
2605 return clp;
2606}
2607
2608static void
2609add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
2610{
2611 struct rb_node **new = &(root->rb_node), *parent = NULL;
2612 struct nfs4_client *clp;
2613
2614 while (*new) {
2615 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
2616 parent = *new;
2617
2618 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
2619 new = &((*new)->rb_left);
2620 else
2621 new = &((*new)->rb_right);
2622 }
2623
2624 rb_link_node(&new_clp->cl_namenode, parent, new);
2625 rb_insert_color(&new_clp->cl_namenode, root);
2626}
2627
2628static struct nfs4_client *
2629find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
2630{
2631 int cmp;
2632 struct rb_node *node = root->rb_node;
2633 struct nfs4_client *clp;
2634
2635 while (node) {
2636 clp = rb_entry(node, struct nfs4_client, cl_namenode);
2637 cmp = compare_blob(&clp->cl_name, name);
2638 if (cmp > 0)
2639 node = node->rb_left;
2640 else if (cmp < 0)
2641 node = node->rb_right;
2642 else
2643 return clp;
2644 }
2645 return NULL;
2646}
2647
2648static void
2649add_to_unconfirmed(struct nfs4_client *clp)
2650{
2651 unsigned int idhashval;
2652 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2653
2654 lockdep_assert_held(&nn->client_lock);
2655
2656 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2657 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
2658 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2659 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
2660 renew_client_locked(clp);
2661}
2662
2663static void
2664move_to_confirmed(struct nfs4_client *clp)
2665{
2666 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2667 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2668
2669 lockdep_assert_held(&nn->client_lock);
2670
2671 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
2672 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
2673 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
2674 add_clp_to_name_tree(clp, &nn->conf_name_tree);
2675 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2676 renew_client_locked(clp);
2677}
2678
2679static struct nfs4_client *
2680find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
2681{
2682 struct nfs4_client *clp;
2683 unsigned int idhashval = clientid_hashval(clid->cl_id);
2684
2685 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
2686 if (same_clid(&clp->cl_clientid, clid)) {
2687 if ((bool)clp->cl_minorversion != sessions)
2688 return NULL;
2689 renew_client_locked(clp);
2690 return clp;
2691 }
2692 }
2693 return NULL;
2694}
2695
2696static struct nfs4_client *
2697find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2698{
2699 struct list_head *tbl = nn->conf_id_hashtbl;
2700
2701 lockdep_assert_held(&nn->client_lock);
2702 return find_client_in_id_table(tbl, clid, sessions);
2703}
2704
2705static struct nfs4_client *
2706find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2707{
2708 struct list_head *tbl = nn->unconf_id_hashtbl;
2709
2710 lockdep_assert_held(&nn->client_lock);
2711 return find_client_in_id_table(tbl, clid, sessions);
2712}
2713
2714static bool clp_used_exchangeid(struct nfs4_client *clp)
2715{
2716 return clp->cl_exchange_flags != 0;
2717}
2718
2719static struct nfs4_client *
2720find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2721{
2722 lockdep_assert_held(&nn->client_lock);
2723 return find_clp_in_name_tree(name, &nn->conf_name_tree);
2724}
2725
2726static struct nfs4_client *
2727find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2728{
2729 lockdep_assert_held(&nn->client_lock);
2730 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
2731}
2732
2733static void
2734gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
2735{
2736 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
2737 struct sockaddr *sa = svc_addr(rqstp);
2738 u32 scopeid = rpc_get_scope_id(sa);
2739 unsigned short expected_family;
2740
2741
2742 if (se->se_callback_netid_len == 3 &&
2743 !memcmp(se->se_callback_netid_val, "tcp", 3))
2744 expected_family = AF_INET;
2745 else if (se->se_callback_netid_len == 4 &&
2746 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2747 expected_family = AF_INET6;
2748 else
2749 goto out_err;
2750
2751 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
2752 se->se_callback_addr_len,
2753 (struct sockaddr *)&conn->cb_addr,
2754 sizeof(conn->cb_addr));
2755
2756 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
2757 goto out_err;
2758
2759 if (conn->cb_addr.ss_family == AF_INET6)
2760 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
2761
2762 conn->cb_prog = se->se_callback_prog;
2763 conn->cb_ident = se->se_callback_ident;
2764 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
2765 return;
2766out_err:
2767 conn->cb_addr.ss_family = AF_UNSPEC;
2768 conn->cb_addrlen = 0;
2769 dprintk("NFSD: this client (clientid %08x/%08x) "
2770 "will not receive delegations\n",
2771 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
2772
2773 return;
2774}
2775
2776
2777
2778
2779static void
2780nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2781{
2782 struct xdr_buf *buf = resp->xdr.buf;
2783 struct nfsd4_slot *slot = resp->cstate.slot;
2784 unsigned int base;
2785
2786 dprintk("--> %s slot %p\n", __func__, slot);
2787
2788 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
2789 slot->sl_opcnt = resp->opcnt;
2790 slot->sl_status = resp->cstate.status;
2791 free_svc_cred(&slot->sl_cred);
2792 copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);
2793
2794 if (!nfsd4_cache_this(resp)) {
2795 slot->sl_flags &= ~NFSD4_SLOT_CACHED;
2796 return;
2797 }
2798 slot->sl_flags |= NFSD4_SLOT_CACHED;
2799
2800 base = resp->cstate.data_offset;
2801 slot->sl_datalen = buf->len - base;
2802 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
2803 WARN(1, "%s: sessions DRC could not cache compound\n",
2804 __func__);
2805 return;
2806}
2807
2808
2809
2810
2811
2812
2813
2814
2815static __be32
2816nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2817 struct nfsd4_compoundres *resp)
2818{
2819 struct nfsd4_op *op;
2820 struct nfsd4_slot *slot = resp->cstate.slot;
2821
2822
2823 op = &args->ops[resp->opcnt - 1];
2824 nfsd4_encode_operation(resp, op);
2825
2826 if (slot->sl_flags & NFSD4_SLOT_CACHED)
2827 return op->status;
2828 if (args->opcnt == 1) {
2829
2830
2831
2832
2833
2834 op->status = nfserr_seq_false_retry;
2835 } else {
2836 op = &args->ops[resp->opcnt++];
2837 op->status = nfserr_retry_uncached_rep;
2838 nfsd4_encode_operation(resp, op);
2839 }
2840 return op->status;
2841}
2842
2843
2844
2845
2846
2847static __be32
2848nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
2849 struct nfsd4_sequence *seq)
2850{
2851 struct nfsd4_slot *slot = resp->cstate.slot;
2852 struct xdr_stream *xdr = &resp->xdr;
2853 __be32 *p;
2854 __be32 status;
2855
2856 dprintk("--> %s slot %p\n", __func__, slot);
2857
2858 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
2859 if (status)
2860 return status;
2861
2862 p = xdr_reserve_space(xdr, slot->sl_datalen);
2863 if (!p) {
2864 WARN_ON_ONCE(1);
2865 return nfserr_serverfault;
2866 }
2867 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
2868 xdr_commit_encode(xdr);
2869
2870 resp->opcnt = slot->sl_opcnt;
2871 return slot->sl_status;
2872}
2873
2874
2875
2876
2877static void
2878nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
2879{
2880#ifdef CONFIG_NFSD_PNFS
2881 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
2882#else
2883 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
2884#endif
2885
2886
2887 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
2888
2889
2890 clid->flags = new->cl_exchange_flags;
2891}
2892
2893static bool client_has_openowners(struct nfs4_client *clp)
2894{
2895 struct nfs4_openowner *oo;
2896
2897 list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
2898 if (!list_empty(&oo->oo_owner.so_stateids))
2899 return true;
2900 }
2901 return false;
2902}
2903
2904static bool client_has_state(struct nfs4_client *clp)
2905{
2906 return client_has_openowners(clp)
2907#ifdef CONFIG_NFSD_PNFS
2908 || !list_empty(&clp->cl_lo_states)
2909#endif
2910 || !list_empty(&clp->cl_delegations)
2911 || !list_empty(&clp->cl_sessions)
2912 || !list_empty(&clp->async_copies);
2913}
2914
2915static __be32 copy_impl_id(struct nfs4_client *clp,
2916 struct nfsd4_exchange_id *exid)
2917{
2918 if (!exid->nii_domain.data)
2919 return 0;
2920 xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);
2921 if (!clp->cl_nii_domain.data)
2922 return nfserr_jukebox;
2923 xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);
2924 if (!clp->cl_nii_name.data)
2925 return nfserr_jukebox;
2926 clp->cl_nii_time.tv_sec = exid->nii_time.tv_sec;
2927 clp->cl_nii_time.tv_nsec = exid->nii_time.tv_nsec;
2928 return 0;
2929}
2930
2931__be32
2932nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2933 union nfsd4_op_u *u)
2934{
2935 struct nfsd4_exchange_id *exid = &u->exchange_id;
2936 struct nfs4_client *conf, *new;
2937 struct nfs4_client *unconf = NULL;
2938 __be32 status;
2939 char addr_str[INET6_ADDRSTRLEN];
2940 nfs4_verifier verf = exid->verifier;
2941 struct sockaddr *sa = svc_addr(rqstp);
2942 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
2943 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2944
2945 rpc_ntop(sa, addr_str, sizeof(addr_str));
2946 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2947 "ip_addr=%s flags %x, spa_how %d\n",
2948 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
2949 addr_str, exid->flags, exid->spa_how);
2950
2951 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
2952 return nfserr_inval;
2953
2954 new = create_client(exid->clname, rqstp, &verf);
2955 if (new == NULL)
2956 return nfserr_jukebox;
2957 status = copy_impl_id(new, exid);
2958 if (status)
2959 goto out_nolock;
2960
2961 switch (exid->spa_how) {
2962 case SP4_MACH_CRED:
2963 exid->spo_must_enforce[0] = 0;
2964 exid->spo_must_enforce[1] = (
2965 1 << (OP_BIND_CONN_TO_SESSION - 32) |
2966 1 << (OP_EXCHANGE_ID - 32) |
2967 1 << (OP_CREATE_SESSION - 32) |
2968 1 << (OP_DESTROY_SESSION - 32) |
2969 1 << (OP_DESTROY_CLIENTID - 32));
2970
2971 exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |
2972 1 << (OP_OPEN_DOWNGRADE) |
2973 1 << (OP_LOCKU) |
2974 1 << (OP_DELEGRETURN));
2975
2976 exid->spo_must_allow[1] &= (
2977 1 << (OP_TEST_STATEID - 32) |
2978 1 << (OP_FREE_STATEID - 32));
2979 if (!svc_rqst_integrity_protected(rqstp)) {
2980 status = nfserr_inval;
2981 goto out_nolock;
2982 }
2983
2984
2985
2986
2987
2988 if (!new->cl_cred.cr_principal &&
2989 !new->cl_cred.cr_raw_principal) {
2990 status = nfserr_serverfault;
2991 goto out_nolock;
2992 }
2993 new->cl_mach_cred = true;
2994 case SP4_NONE:
2995 break;
2996 default:
2997 WARN_ON_ONCE(1);
2998
2999 case SP4_SSV:
3000 status = nfserr_encr_alg_unsupp;
3001 goto out_nolock;
3002 }
3003
3004
3005 spin_lock(&nn->client_lock);
3006 conf = find_confirmed_client_by_name(&exid->clname, nn);
3007 if (conf) {
3008 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
3009 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
3010
3011 if (update) {
3012 if (!clp_used_exchangeid(conf)) {
3013 status = nfserr_inval;
3014 goto out;
3015 }
3016 if (!nfsd4_mach_creds_match(conf, rqstp)) {
3017 status = nfserr_wrong_cred;
3018 goto out;
3019 }
3020 if (!creds_match) {
3021 status = nfserr_perm;
3022 goto out;
3023 }
3024 if (!verfs_match) {
3025 status = nfserr_not_same;
3026 goto out;
3027 }
3028
3029 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
3030 goto out_copy;
3031 }
3032 if (!creds_match) {
3033 if (client_has_state(conf)) {
3034 status = nfserr_clid_inuse;
3035 goto out;
3036 }
3037 goto out_new;
3038 }
3039 if (verfs_match) {
3040 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
3041 goto out_copy;
3042 }
3043
3044 conf = NULL;
3045 goto out_new;
3046 }
3047
3048 if (update) {
3049 status = nfserr_noent;
3050 goto out;
3051 }
3052
3053 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
3054 if (unconf)
3055 unhash_client_locked(unconf);
3056
3057
3058out_new:
3059 if (conf) {
3060 status = mark_client_expired_locked(conf);
3061 if (status)
3062 goto out;
3063 }
3064 new->cl_minorversion = cstate->minorversion;
3065 new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
3066 new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
3067
3068 add_to_unconfirmed(new);
3069 swap(new, conf);
3070out_copy:
3071 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
3072 exid->clientid.cl_id = conf->cl_clientid.cl_id;
3073
3074 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
3075 nfsd4_set_ex_flags(conf, exid);
3076
3077 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
3078 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
3079 status = nfs_ok;
3080
3081out:
3082 spin_unlock(&nn->client_lock);
3083out_nolock:
3084 if (new)
3085 expire_client(new);
3086 if (unconf)
3087 expire_client(unconf);
3088 return status;
3089}
3090
3091static __be32
3092check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
3093{
3094 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
3095 slot_seqid);
3096
3097
3098 if (slot_inuse) {
3099 if (seqid == slot_seqid)
3100 return nfserr_jukebox;
3101 else
3102 return nfserr_seq_misordered;
3103 }
3104
3105 if (likely(seqid == slot_seqid + 1))
3106 return nfs_ok;
3107 if (seqid == slot_seqid)
3108 return nfserr_replay_cache;
3109 return nfserr_seq_misordered;
3110}
3111
3112
3113
3114
3115
3116
3117static void
3118nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
3119 struct nfsd4_clid_slot *slot, __be32 nfserr)
3120{
3121 slot->sl_status = nfserr;
3122 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
3123}
3124
3125static __be32
3126nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
3127 struct nfsd4_clid_slot *slot)
3128{
3129 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
3130 return slot->sl_status;
3131}
3132
3133#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
3134 2 * 2 + \
3135 1 + \
3136 3 + \
3137 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
3138 \
3139 4 ) * sizeof(__be32))
3140
3141#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
3142 2 + \
3143 1 + \
3144 1 + \
3145 3 + \
3146 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
3147 \
3148 5 ) * sizeof(__be32))
3149
3150static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
3151{
3152 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
3153
3154 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
3155 return nfserr_toosmall;
3156 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
3157 return nfserr_toosmall;
3158 ca->headerpadsz = 0;
3159 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
3160 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
3161 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
3162 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
3163 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
3164 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
3165
3166
3167
3168
3169
3170
3171
3172
3173 ca->maxreqs = nfsd4_get_drc_mem(ca);
3174 if (!ca->maxreqs)
3175 return nfserr_jukebox;
3176
3177 return nfs_ok;
3178}
3179
3180
3181
3182
3183
3184#define RPC_MAX_HEADER_WITH_AUTH_SYS \
3185 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
3186
3187#define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
3188 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
3189
3190#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
3191 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
3192#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
3193 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
3194 sizeof(__be32))
3195
3196static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
3197{
3198 ca->headerpadsz = 0;
3199
3200 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
3201 return nfserr_toosmall;
3202 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
3203 return nfserr_toosmall;
3204 ca->maxresp_cached = 0;
3205 if (ca->maxops < 2)
3206 return nfserr_toosmall;
3207
3208 return nfs_ok;
3209}
3210
3211static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
3212{
3213 switch (cbs->flavor) {
3214 case RPC_AUTH_NULL:
3215 case RPC_AUTH_UNIX:
3216 return nfs_ok;
3217 default:
3218
3219
3220
3221
3222
3223
3224
3225 return nfserr_encr_alg_unsupp;
3226 }
3227}
3228
3229__be32
3230nfsd4_create_session(struct svc_rqst *rqstp,
3231 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
3232{
3233 struct nfsd4_create_session *cr_ses = &u->create_session;
3234 struct sockaddr *sa = svc_addr(rqstp);
3235 struct nfs4_client *conf, *unconf;
3236 struct nfs4_client *old = NULL;
3237 struct nfsd4_session *new;
3238 struct nfsd4_conn *conn;
3239 struct nfsd4_clid_slot *cs_slot = NULL;
3240 __be32 status = 0;
3241 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3242
3243 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
3244 return nfserr_inval;
3245 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
3246 if (status)
3247 return status;
3248 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
3249 if (status)
3250 return status;
3251 status = check_backchannel_attrs(&cr_ses->back_channel);
3252 if (status)
3253 goto out_release_drc_mem;
3254 status = nfserr_jukebox;
3255 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
3256 if (!new)
3257 goto out_release_drc_mem;
3258 conn = alloc_conn_from_crses(rqstp, cr_ses);
3259 if (!conn)
3260 goto out_free_session;
3261
3262 spin_lock(&nn->client_lock);
3263 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
3264 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
3265 WARN_ON_ONCE(conf && unconf);
3266
3267 if (conf) {
3268 status = nfserr_wrong_cred;
3269 if (!nfsd4_mach_creds_match(conf, rqstp))
3270 goto out_free_conn;
3271 cs_slot = &conf->cl_cs_slot;
3272 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
3273 if (status) {
3274 if (status == nfserr_replay_cache)
3275 status = nfsd4_replay_create_session(cr_ses, cs_slot);
3276 goto out_free_conn;
3277 }
3278 } else if (unconf) {
3279 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
3280 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
3281 status = nfserr_clid_inuse;
3282 goto out_free_conn;
3283 }
3284 status = nfserr_wrong_cred;
3285 if (!nfsd4_mach_creds_match(unconf, rqstp))
3286 goto out_free_conn;
3287 cs_slot = &unconf->cl_cs_slot;
3288 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
3289 if (status) {
3290
3291 status = nfserr_seq_misordered;
3292 goto out_free_conn;
3293 }
3294 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3295 if (old) {
3296 status = mark_client_expired_locked(old);
3297 if (status) {
3298 old = NULL;
3299 goto out_free_conn;
3300 }
3301 }
3302 move_to_confirmed(unconf);
3303 conf = unconf;
3304 } else {
3305 status = nfserr_stale_clientid;
3306 goto out_free_conn;
3307 }
3308 status = nfs_ok;
3309
3310 cr_ses->flags &= ~SESSION4_PERSIST;
3311
3312 cr_ses->flags &= ~SESSION4_RDMA;
3313
3314 init_session(rqstp, new, conf, cr_ses);
3315 nfsd4_get_session_locked(new);
3316
3317 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
3318 NFS4_MAX_SESSIONID_LEN);
3319 cs_slot->sl_seqid++;
3320 cr_ses->seqid = cs_slot->sl_seqid;
3321
3322
3323 nfsd4_cache_create_session(cr_ses, cs_slot, status);
3324 spin_unlock(&nn->client_lock);
3325
3326 nfsd4_init_conn(rqstp, conn, new);
3327 nfsd4_put_session(new);
3328 if (old)
3329 expire_client(old);
3330 return status;
3331out_free_conn:
3332 spin_unlock(&nn->client_lock);
3333 free_conn(conn);
3334 if (old)
3335 expire_client(old);
3336out_free_session:
3337 __free_session(new);
3338out_release_drc_mem:
3339 nfsd4_put_drc_mem(&cr_ses->fore_channel);
3340 return status;
3341}
3342
3343static __be32 nfsd4_map_bcts_dir(u32 *dir)
3344{
3345 switch (*dir) {
3346 case NFS4_CDFC4_FORE:
3347 case NFS4_CDFC4_BACK:
3348 return nfs_ok;
3349 case NFS4_CDFC4_FORE_OR_BOTH:
3350 case NFS4_CDFC4_BACK_OR_BOTH:
3351 *dir = NFS4_CDFC4_BOTH;
3352 return nfs_ok;
3353 };
3354 return nfserr_inval;
3355}
3356
3357__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp,
3358 struct nfsd4_compound_state *cstate,
3359 union nfsd4_op_u *u)
3360{
3361 struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
3362 struct nfsd4_session *session = cstate->session;
3363 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3364 __be32 status;
3365
3366 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
3367 if (status)
3368 return status;
3369 spin_lock(&nn->client_lock);
3370 session->se_cb_prog = bc->bc_cb_program;
3371 session->se_cb_sec = bc->bc_cb_sec;
3372 spin_unlock(&nn->client_lock);
3373
3374 nfsd4_probe_callback(session->se_client);
3375
3376 return nfs_ok;
3377}
3378
3379__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
3380 struct nfsd4_compound_state *cstate,
3381 union nfsd4_op_u *u)
3382{
3383 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
3384 __be32 status;
3385 struct nfsd4_conn *conn;
3386 struct nfsd4_session *session;
3387 struct net *net = SVC_NET(rqstp);
3388 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3389
3390 if (!nfsd4_last_compound_op(rqstp))
3391 return nfserr_not_only_op;
3392 spin_lock(&nn->client_lock);
3393 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
3394 spin_unlock(&nn->client_lock);
3395 if (!session)
3396 goto out_no_session;
3397 status = nfserr_wrong_cred;
3398 if (!nfsd4_mach_creds_match(session->se_client, rqstp))
3399 goto out;
3400 status = nfsd4_map_bcts_dir(&bcts->dir);
3401 if (status)
3402 goto out;
3403 conn = alloc_conn(rqstp, bcts->dir);
3404 status = nfserr_jukebox;
3405 if (!conn)
3406 goto out;
3407 nfsd4_init_conn(rqstp, conn, session);
3408 status = nfs_ok;
3409out:
3410 nfsd4_put_session(session);
3411out_no_session:
3412 return status;
3413}
3414
3415static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid)
3416{
3417 if (!cstate->session)
3418 return false;
3419 return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid));
3420}
3421
3422__be32
3423nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate,
3424 union nfsd4_op_u *u)
3425{
3426 struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid;
3427 struct nfsd4_session *ses;
3428 __be32 status;
3429 int ref_held_by_me = 0;
3430 struct net *net = SVC_NET(r);
3431 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3432
3433 status = nfserr_not_only_op;
3434 if (nfsd4_compound_in_session(cstate, sessionid)) {
3435 if (!nfsd4_last_compound_op(r))
3436 goto out;
3437 ref_held_by_me++;
3438 }
3439 dump_sessionid(__func__, sessionid);
3440 spin_lock(&nn->client_lock);
3441 ses = find_in_sessionid_hashtbl(sessionid, net, &status);
3442 if (!ses)
3443 goto out_client_lock;
3444 status = nfserr_wrong_cred;
3445 if (!nfsd4_mach_creds_match(ses->se_client, r))
3446 goto out_put_session;
3447 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
3448 if (status)
3449 goto out_put_session;
3450 unhash_session(ses);
3451 spin_unlock(&nn->client_lock);
3452
3453 nfsd4_probe_callback_sync(ses->se_client);
3454
3455 spin_lock(&nn->client_lock);
3456 status = nfs_ok;
3457out_put_session:
3458 nfsd4_put_session_locked(ses);
3459out_client_lock:
3460 spin_unlock(&nn->client_lock);
3461out:
3462 return status;
3463}
3464
3465static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
3466{
3467 struct nfsd4_conn *c;
3468
3469 list_for_each_entry(c, &s->se_conns, cn_persession) {
3470 if (c->cn_xprt == xpt) {
3471 return c;
3472 }
3473 }
3474 return NULL;
3475}
3476
3477static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
3478{
3479 struct nfs4_client *clp = ses->se_client;
3480 struct nfsd4_conn *c;
3481 __be32 status = nfs_ok;
3482 int ret;
3483
3484 spin_lock(&clp->cl_lock);
3485 c = __nfsd4_find_conn(new->cn_xprt, ses);
3486 if (c)
3487 goto out_free;
3488 status = nfserr_conn_not_bound_to_session;
3489 if (clp->cl_mach_cred)
3490 goto out_free;
3491 __nfsd4_hash_conn(new, ses);
3492 spin_unlock(&clp->cl_lock);
3493 ret = nfsd4_register_conn(new);
3494 if (ret)
3495
3496 nfsd4_conn_lost(&new->cn_xpt_user);
3497 return nfs_ok;
3498out_free:
3499 spin_unlock(&clp->cl_lock);
3500 free_conn(new);
3501 return status;
3502}
3503
3504static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
3505{
3506 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3507
3508 return args->opcnt > session->se_fchannel.maxops;
3509}
3510
3511static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
3512 struct nfsd4_session *session)
3513{
3514 struct xdr_buf *xb = &rqstp->rq_arg;
3515
3516 return xb->len > session->se_fchannel.maxreq_sz;
3517}
3518
3519static bool replay_matches_cache(struct svc_rqst *rqstp,
3520 struct nfsd4_sequence *seq, struct nfsd4_slot *slot)
3521{
3522 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3523
3524 if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=
3525 (bool)seq->cachethis)
3526 return false;
3527
3528
3529
3530
3531
3532
3533 if (slot->sl_opcnt < argp->opcnt)
3534 return false;
3535
3536 if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))
3537 return false;
3538
3539
3540
3541
3542
3543
3544 return true;
3545}
3546
3547__be32
3548nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3549 union nfsd4_op_u *u)
3550{
3551 struct nfsd4_sequence *seq = &u->sequence;
3552 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3553 struct xdr_stream *xdr = &resp->xdr;
3554 struct nfsd4_session *session;
3555 struct nfs4_client *clp;
3556 struct nfsd4_slot *slot;
3557 struct nfsd4_conn *conn;
3558 __be32 status;
3559 int buflen;
3560 struct net *net = SVC_NET(rqstp);
3561 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3562
3563 if (resp->opcnt != 1)
3564 return nfserr_sequence_pos;
3565
3566
3567
3568
3569
3570 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
3571 if (!conn)
3572 return nfserr_jukebox;
3573
3574 spin_lock(&nn->client_lock);
3575 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
3576 if (!session)
3577 goto out_no_session;
3578 clp = session->se_client;
3579
3580 status = nfserr_too_many_ops;
3581 if (nfsd4_session_too_many_ops(rqstp, session))
3582 goto out_put_session;
3583
3584 status = nfserr_req_too_big;
3585 if (nfsd4_request_too_big(rqstp, session))
3586 goto out_put_session;
3587
3588 status = nfserr_badslot;
3589 if (seq->slotid >= session->se_fchannel.maxreqs)
3590 goto out_put_session;
3591
3592 slot = session->se_slots[seq->slotid];
3593 dprintk("%s: slotid %d\n", __func__, seq->slotid);
3594
3595
3596
3597
3598 seq->maxslots = session->se_fchannel.maxreqs;
3599
3600 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
3601 slot->sl_flags & NFSD4_SLOT_INUSE);
3602 if (status == nfserr_replay_cache) {
3603 status = nfserr_seq_misordered;
3604 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
3605 goto out_put_session;
3606 status = nfserr_seq_false_retry;
3607 if (!replay_matches_cache(rqstp, seq, slot))
3608 goto out_put_session;
3609 cstate->slot = slot;
3610 cstate->session = session;
3611 cstate->clp = clp;
3612
3613
3614 status = nfsd4_replay_cache_entry(resp, seq);
3615 cstate->status = nfserr_replay_cache;
3616 goto out;
3617 }
3618 if (status)
3619 goto out_put_session;
3620
3621 status = nfsd4_sequence_check_conn(conn, session);
3622 conn = NULL;
3623 if (status)
3624 goto out_put_session;
3625
3626 buflen = (seq->cachethis) ?
3627 session->se_fchannel.maxresp_cached :
3628 session->se_fchannel.maxresp_sz;
3629 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
3630 nfserr_rep_too_big;
3631 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
3632 goto out_put_session;
3633 svc_reserve(rqstp, buflen);
3634
3635 status = nfs_ok;
3636
3637 slot->sl_seqid = seq->seqid;
3638 slot->sl_flags |= NFSD4_SLOT_INUSE;
3639 if (seq->cachethis)
3640 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
3641 else
3642 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
3643
3644 cstate->slot = slot;
3645 cstate->session = session;
3646 cstate->clp = clp;
3647
3648out:
3649 switch (clp->cl_cb_state) {
3650 case NFSD4_CB_DOWN:
3651 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
3652 break;
3653 case NFSD4_CB_FAULT:
3654 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
3655 break;
3656 default:
3657 seq->status_flags = 0;
3658 }
3659 if (!list_empty(&clp->cl_revoked))
3660 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
3661out_no_session:
3662 if (conn)
3663 free_conn(conn);
3664 spin_unlock(&nn->client_lock);
3665 return status;
3666out_put_session:
3667 nfsd4_put_session_locked(session);
3668 goto out_no_session;
3669}
3670
3671void
3672nfsd4_sequence_done(struct nfsd4_compoundres *resp)
3673{
3674 struct nfsd4_compound_state *cs = &resp->cstate;
3675
3676 if (nfsd4_has_session(cs)) {
3677 if (cs->status != nfserr_replay_cache) {
3678 nfsd4_store_cache_entry(resp);
3679 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3680 }
3681
3682 nfsd4_put_session(cs->session);
3683 } else if (cs->clp)
3684 put_client_renew(cs->clp);
3685}
3686
3687__be32
3688nfsd4_destroy_clientid(struct svc_rqst *rqstp,
3689 struct nfsd4_compound_state *cstate,
3690 union nfsd4_op_u *u)
3691{
3692 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
3693 struct nfs4_client *conf, *unconf;
3694 struct nfs4_client *clp = NULL;
3695 __be32 status = 0;
3696 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3697
3698 spin_lock(&nn->client_lock);
3699 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
3700 conf = find_confirmed_client(&dc->clientid, true, nn);
3701 WARN_ON_ONCE(conf && unconf);
3702
3703 if (conf) {
3704 if (client_has_state(conf)) {
3705 status = nfserr_clientid_busy;
3706 goto out;
3707 }
3708 status = mark_client_expired_locked(conf);
3709 if (status)
3710 goto out;
3711 clp = conf;
3712 } else if (unconf)
3713 clp = unconf;
3714 else {
3715 status = nfserr_stale_clientid;
3716 goto out;
3717 }
3718 if (!nfsd4_mach_creds_match(clp, rqstp)) {
3719 clp = NULL;
3720 status = nfserr_wrong_cred;
3721 goto out;
3722 }
3723 unhash_client_locked(clp);
3724out:
3725 spin_unlock(&nn->client_lock);
3726 if (clp)
3727 expire_client(clp);
3728 return status;
3729}
3730
3731__be32
3732nfsd4_reclaim_complete(struct svc_rqst *rqstp,
3733 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
3734{
3735 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
3736 __be32 status = 0;
3737
3738 if (rc->rca_one_fs) {
3739 if (!cstate->current_fh.fh_dentry)
3740 return nfserr_nofilehandle;
3741
3742
3743
3744
3745 return nfs_ok;
3746 }
3747
3748 status = nfserr_complete_already;
3749 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
3750 &cstate->session->se_client->cl_flags))
3751 goto out;
3752
3753 status = nfserr_stale_clientid;
3754 if (is_client_expired(cstate->session->se_client))
3755
3756
3757
3758
3759
3760
3761
3762 goto out;
3763
3764 status = nfs_ok;
3765 nfsd4_client_record_create(cstate->session->se_client);
3766 inc_reclaim_complete(cstate->session->se_client);
3767out:
3768 return status;
3769}
3770
3771__be32
3772nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3773 union nfsd4_op_u *u)
3774{
3775 struct nfsd4_setclientid *setclid = &u->setclientid;
3776 struct xdr_netobj clname = setclid->se_name;
3777 nfs4_verifier clverifier = setclid->se_verf;
3778 struct nfs4_client *conf, *new;
3779 struct nfs4_client *unconf = NULL;
3780 __be32 status;
3781 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3782
3783 new = create_client(clname, rqstp, &clverifier);
3784 if (new == NULL)
3785 return nfserr_jukebox;
3786
3787 spin_lock(&nn->client_lock);
3788 conf = find_confirmed_client_by_name(&clname, nn);
3789 if (conf && client_has_state(conf)) {
3790
3791 status = nfserr_clid_inuse;
3792 if (clp_used_exchangeid(conf))
3793 goto out;
3794 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
3795 char addr_str[INET6_ADDRSTRLEN];
3796 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
3797 sizeof(addr_str));
3798 dprintk("NFSD: setclientid: string in use by client "
3799 "at %s\n", addr_str);
3800 goto out;
3801 }
3802 }
3803 unconf = find_unconfirmed_client_by_name(&clname, nn);
3804 if (unconf)
3805 unhash_client_locked(unconf);
3806 if (conf && same_verf(&conf->cl_verifier, &clverifier)) {
3807
3808 copy_clid(new, conf);
3809 gen_confirm(new, nn);
3810 } else
3811 ;
3812 new->cl_minorversion = 0;
3813 gen_callback(new, setclid, rqstp);
3814 add_to_unconfirmed(new);
3815 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
3816 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
3817 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
3818 new = NULL;
3819 status = nfs_ok;
3820out:
3821 spin_unlock(&nn->client_lock);
3822 if (new)
3823 free_client(new);
3824 if (unconf)
3825 expire_client(unconf);
3826 return status;
3827}
3828
3829
3830__be32
3831nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
3832 struct nfsd4_compound_state *cstate,
3833 union nfsd4_op_u *u)
3834{
3835 struct nfsd4_setclientid_confirm *setclientid_confirm =
3836 &u->setclientid_confirm;
3837 struct nfs4_client *conf, *unconf;
3838 struct nfs4_client *old = NULL;
3839 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
3840 clientid_t * clid = &setclientid_confirm->sc_clientid;
3841 __be32 status;
3842 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3843
3844 if (STALE_CLIENTID(clid, nn))
3845 return nfserr_stale_clientid;
3846
3847 spin_lock(&nn->client_lock);
3848 conf = find_confirmed_client(clid, false, nn);
3849 unconf = find_unconfirmed_client(clid, false, nn);
3850
3851
3852
3853
3854
3855
3856
3857 status = nfserr_clid_inuse;
3858 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
3859 goto out;
3860 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
3861 goto out;
3862
3863 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
3864 if (conf && same_verf(&confirm, &conf->cl_confirm)) {
3865
3866 status = nfs_ok;
3867 } else
3868 status = nfserr_stale_clientid;
3869 goto out;
3870 }
3871 status = nfs_ok;
3872 if (conf) {
3873 old = unconf;
3874 unhash_client_locked(old);
3875 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
3876 } else {
3877 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3878 if (old) {
3879 status = nfserr_clid_inuse;
3880 if (client_has_state(old)
3881 && !same_creds(&unconf->cl_cred,
3882 &old->cl_cred))
3883 goto out;
3884 status = mark_client_expired_locked(old);
3885 if (status) {
3886 old = NULL;
3887 goto out;
3888 }
3889 }
3890 move_to_confirmed(unconf);
3891 conf = unconf;
3892 }
3893 get_client_locked(conf);
3894 spin_unlock(&nn->client_lock);
3895 nfsd4_probe_callback(conf);
3896 spin_lock(&nn->client_lock);
3897 put_client_renew_locked(conf);
3898out:
3899 spin_unlock(&nn->client_lock);
3900 if (old)
3901 expire_client(old);
3902 return status;
3903}
3904
3905static struct nfs4_file *nfsd4_alloc_file(void)
3906{
3907 return kmem_cache_alloc(file_slab, GFP_KERNEL);
3908}
3909
3910
3911static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
3912 struct nfs4_file *fp)
3913{
3914 lockdep_assert_held(&state_lock);
3915
3916 refcount_set(&fp->fi_ref, 1);
3917 spin_lock_init(&fp->fi_lock);
3918 INIT_LIST_HEAD(&fp->fi_stateids);
3919 INIT_LIST_HEAD(&fp->fi_delegations);
3920 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
3921 fh_copy_shallow(&fp->fi_fhandle, fh);
3922 fp->fi_deleg_file = NULL;
3923 fp->fi_had_conflict = false;
3924 fp->fi_share_deny = 0;
3925 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
3926 memset(fp->fi_access, 0, sizeof(fp->fi_access));
3927#ifdef CONFIG_NFSD_PNFS
3928 INIT_LIST_HEAD(&fp->fi_lo_states);
3929 atomic_set(&fp->fi_lo_recalls, 0);
3930#endif
3931 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
3932}
3933
3934void
3935nfsd4_free_slabs(void)
3936{
3937 kmem_cache_destroy(client_slab);
3938 kmem_cache_destroy(openowner_slab);
3939 kmem_cache_destroy(lockowner_slab);
3940 kmem_cache_destroy(file_slab);
3941 kmem_cache_destroy(stateid_slab);
3942 kmem_cache_destroy(deleg_slab);
3943 kmem_cache_destroy(odstate_slab);
3944}
3945
3946int
3947nfsd4_init_slabs(void)
3948{
3949 client_slab = kmem_cache_create("nfsd4_clients",
3950 sizeof(struct nfs4_client), 0, 0, NULL);
3951 if (client_slab == NULL)
3952 goto out;
3953 openowner_slab = kmem_cache_create("nfsd4_openowners",
3954 sizeof(struct nfs4_openowner), 0, 0, NULL);
3955 if (openowner_slab == NULL)
3956 goto out_free_client_slab;
3957 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
3958 sizeof(struct nfs4_lockowner), 0, 0, NULL);
3959 if (lockowner_slab == NULL)
3960 goto out_free_openowner_slab;
3961 file_slab = kmem_cache_create("nfsd4_files",
3962 sizeof(struct nfs4_file), 0, 0, NULL);
3963 if (file_slab == NULL)
3964 goto out_free_lockowner_slab;
3965 stateid_slab = kmem_cache_create("nfsd4_stateids",
3966 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
3967 if (stateid_slab == NULL)
3968 goto out_free_file_slab;
3969 deleg_slab = kmem_cache_create("nfsd4_delegations",
3970 sizeof(struct nfs4_delegation), 0, 0, NULL);
3971 if (deleg_slab == NULL)
3972 goto out_free_stateid_slab;
3973 odstate_slab = kmem_cache_create("nfsd4_odstate",
3974 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
3975 if (odstate_slab == NULL)
3976 goto out_free_deleg_slab;
3977 return 0;
3978
3979out_free_deleg_slab:
3980 kmem_cache_destroy(deleg_slab);
3981out_free_stateid_slab:
3982 kmem_cache_destroy(stateid_slab);
3983out_free_file_slab:
3984 kmem_cache_destroy(file_slab);
3985out_free_lockowner_slab:
3986 kmem_cache_destroy(lockowner_slab);
3987out_free_openowner_slab:
3988 kmem_cache_destroy(openowner_slab);
3989out_free_client_slab:
3990 kmem_cache_destroy(client_slab);
3991out:
3992 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3993 return -ENOMEM;
3994}
3995
3996static void init_nfs4_replay(struct nfs4_replay *rp)
3997{
3998 rp->rp_status = nfserr_serverfault;
3999 rp->rp_buflen = 0;
4000 rp->rp_buf = rp->rp_ibuf;
4001 mutex_init(&rp->rp_mutex);
4002}
4003
4004static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
4005 struct nfs4_stateowner *so)
4006{
4007 if (!nfsd4_has_session(cstate)) {
4008 mutex_lock(&so->so_replay.rp_mutex);
4009 cstate->replay_owner = nfs4_get_stateowner(so);
4010 }
4011}
4012
4013void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
4014{
4015 struct nfs4_stateowner *so = cstate->replay_owner;
4016
4017 if (so != NULL) {
4018 cstate->replay_owner = NULL;
4019 mutex_unlock(&so->so_replay.rp_mutex);
4020 nfs4_put_stateowner(so);
4021 }
4022}
4023
4024static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
4025{
4026 struct nfs4_stateowner *sop;
4027
4028 sop = kmem_cache_alloc(slab, GFP_KERNEL);
4029 if (!sop)
4030 return NULL;
4031
4032 xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);
4033 if (!sop->so_owner.data) {
4034 kmem_cache_free(slab, sop);
4035 return NULL;
4036 }
4037
4038 INIT_LIST_HEAD(&sop->so_stateids);
4039 sop->so_client = clp;
4040 init_nfs4_replay(&sop->so_replay);
4041 atomic_set(&sop->so_count, 1);
4042 return sop;
4043}
4044
4045static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
4046{
4047 lockdep_assert_held(&clp->cl_lock);
4048
4049 list_add(&oo->oo_owner.so_strhash,
4050 &clp->cl_ownerstr_hashtbl[strhashval]);
4051 list_add(&oo->oo_perclient, &clp->cl_openowners);
4052}
4053
4054static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
4055{
4056 unhash_openowner_locked(openowner(so));
4057}
4058
4059static void nfs4_free_openowner(struct nfs4_stateowner *so)
4060{
4061 struct nfs4_openowner *oo = openowner(so);
4062
4063 kmem_cache_free(openowner_slab, oo);
4064}
4065
4066static const struct nfs4_stateowner_operations openowner_ops = {
4067 .so_unhash = nfs4_unhash_openowner,
4068 .so_free = nfs4_free_openowner,
4069};
4070
4071static struct nfs4_ol_stateid *
4072nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
4073{
4074 struct nfs4_ol_stateid *local, *ret = NULL;
4075 struct nfs4_openowner *oo = open->op_openowner;
4076
4077 lockdep_assert_held(&fp->fi_lock);
4078
4079 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
4080
4081 if (local->st_stateowner->so_is_open_owner == 0)
4082 continue;
4083 if (local->st_stateowner != &oo->oo_owner)
4084 continue;
4085 if (local->st_stid.sc_type == NFS4_OPEN_STID) {
4086 ret = local;
4087 refcount_inc(&ret->st_stid.sc_count);
4088 break;
4089 }
4090 }
4091 return ret;
4092}
4093
4094static __be32
4095nfsd4_verify_open_stid(struct nfs4_stid *s)
4096{
4097 __be32 ret = nfs_ok;
4098
4099 switch (s->sc_type) {
4100 default:
4101 break;
4102 case 0:
4103 case NFS4_CLOSED_STID:
4104 case NFS4_CLOSED_DELEG_STID:
4105 ret = nfserr_bad_stateid;
4106 break;
4107 case NFS4_REVOKED_DELEG_STID:
4108 ret = nfserr_deleg_revoked;
4109 }
4110 return ret;
4111}
4112
4113
4114static __be32
4115nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp)
4116{
4117 __be32 ret;
4118
4119 mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);
4120 ret = nfsd4_verify_open_stid(&stp->st_stid);
4121 if (ret != nfs_ok)
4122 mutex_unlock(&stp->st_mutex);
4123 return ret;
4124}
4125
4126static struct nfs4_ol_stateid *
4127nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
4128{
4129 struct nfs4_ol_stateid *stp;
4130 for (;;) {
4131 spin_lock(&fp->fi_lock);
4132 stp = nfsd4_find_existing_open(fp, open);
4133 spin_unlock(&fp->fi_lock);
4134 if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok)
4135 break;
4136 nfs4_put_stid(&stp->st_stid);
4137 }
4138 return stp;
4139}
4140
4141static struct nfs4_openowner *
4142alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
4143 struct nfsd4_compound_state *cstate)
4144{
4145 struct nfs4_client *clp = cstate->clp;
4146 struct nfs4_openowner *oo, *ret;
4147
4148 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
4149 if (!oo)
4150 return NULL;
4151 oo->oo_owner.so_ops = &openowner_ops;
4152 oo->oo_owner.so_is_open_owner = 1;
4153 oo->oo_owner.so_seqid = open->op_seqid;
4154 oo->oo_flags = 0;
4155 if (nfsd4_has_session(cstate))
4156 oo->oo_flags |= NFS4_OO_CONFIRMED;
4157 oo->oo_time = 0;
4158 oo->oo_last_closed_stid = NULL;
4159 INIT_LIST_HEAD(&oo->oo_close_lru);
4160 spin_lock(&clp->cl_lock);
4161 ret = find_openstateowner_str_locked(strhashval, open, clp);
4162 if (ret == NULL) {
4163 hash_openowner(oo, clp, strhashval);
4164 ret = oo;
4165 } else
4166 nfs4_free_stateowner(&oo->oo_owner);
4167
4168 spin_unlock(&clp->cl_lock);
4169 return ret;
4170}
4171
4172static struct nfs4_ol_stateid *
4173init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
4174{
4175
4176 struct nfs4_openowner *oo = open->op_openowner;
4177 struct nfs4_ol_stateid *retstp = NULL;
4178 struct nfs4_ol_stateid *stp;
4179
4180 stp = open->op_stp;
4181
4182 mutex_init(&stp->st_mutex);
4183 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
4184
4185retry:
4186 spin_lock(&oo->oo_owner.so_client->cl_lock);
4187 spin_lock(&fp->fi_lock);
4188
4189 retstp = nfsd4_find_existing_open(fp, open);
4190 if (retstp)
4191 goto out_unlock;
4192
4193 open->op_stp = NULL;
4194 refcount_inc(&stp->st_stid.sc_count);
4195 stp->st_stid.sc_type = NFS4_OPEN_STID;
4196 INIT_LIST_HEAD(&stp->st_locks);
4197 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
4198 get_nfs4_file(fp);
4199 stp->st_stid.sc_file = fp;
4200 stp->st_access_bmap = 0;
4201 stp->st_deny_bmap = 0;
4202 stp->st_openstp = NULL;
4203 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
4204 list_add(&stp->st_perfile, &fp->fi_stateids);
4205
4206out_unlock:
4207 spin_unlock(&fp->fi_lock);
4208 spin_unlock(&oo->oo_owner.so_client->cl_lock);
4209 if (retstp) {
4210
4211 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
4212 nfs4_put_stid(&retstp->st_stid);
4213 goto retry;
4214 }
4215
4216 mutex_unlock(&stp->st_mutex);
4217 stp = retstp;
4218 }
4219 return stp;
4220}
4221
4222
4223
4224
4225
4226
4227static void
4228move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
4229{
4230 struct nfs4_ol_stateid *last;
4231 struct nfs4_openowner *oo = openowner(s->st_stateowner);
4232 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
4233 nfsd_net_id);
4234
4235 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246 wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);
4247
4248 release_all_access(s);
4249 if (s->st_stid.sc_file) {
4250 put_nfs4_file(s->st_stid.sc_file);
4251 s->st_stid.sc_file = NULL;
4252 }
4253
4254 spin_lock(&nn->client_lock);
4255 last = oo->oo_last_closed_stid;
4256 oo->oo_last_closed_stid = s;
4257 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
4258 oo->oo_time = get_seconds();
4259 spin_unlock(&nn->client_lock);
4260 if (last)
4261 nfs4_put_stid(&last->st_stid);
4262}
4263
4264
4265static struct nfs4_file *
4266find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
4267{
4268 struct nfs4_file *fp;
4269
4270 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
4271 if (fh_match(&fp->fi_fhandle, fh)) {
4272 if (refcount_inc_not_zero(&fp->fi_ref))
4273 return fp;
4274 }
4275 }
4276 return NULL;
4277}
4278
4279struct nfs4_file *
4280find_file(struct knfsd_fh *fh)
4281{
4282 struct nfs4_file *fp;
4283 unsigned int hashval = file_hashval(fh);
4284
4285 rcu_read_lock();
4286 fp = find_file_locked(fh, hashval);
4287 rcu_read_unlock();
4288 return fp;
4289}
4290
4291static struct nfs4_file *
4292find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
4293{
4294 struct nfs4_file *fp;
4295 unsigned int hashval = file_hashval(fh);
4296
4297 rcu_read_lock();
4298 fp = find_file_locked(fh, hashval);
4299 rcu_read_unlock();
4300 if (fp)
4301 return fp;
4302
4303 spin_lock(&state_lock);
4304 fp = find_file_locked(fh, hashval);
4305 if (likely(fp == NULL)) {
4306 nfsd4_init_file(fh, hashval, new);
4307 fp = new;
4308 }
4309 spin_unlock(&state_lock);
4310
4311 return fp;
4312}
4313
4314
4315
4316
4317
4318static __be32
4319nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
4320{
4321 struct nfs4_file *fp;
4322 __be32 ret = nfs_ok;
4323
4324 fp = find_file(¤t_fh->fh_handle);
4325 if (!fp)
4326 return ret;
4327
4328 spin_lock(&fp->fi_lock);
4329 if (fp->fi_share_deny & deny_type)
4330 ret = nfserr_locked;
4331 spin_unlock(&fp->fi_lock);
4332 put_nfs4_file(fp);
4333 return ret;
4334}
4335
4336static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
4337{
4338 struct nfs4_delegation *dp = cb_to_delegation(cb);
4339 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
4340 nfsd_net_id);
4341
4342 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
4343
4344
4345
4346
4347
4348
4349
4350
4351 spin_lock(&state_lock);
4352 if (dp->dl_time == 0) {
4353 dp->dl_time = get_seconds();
4354 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
4355 }
4356 spin_unlock(&state_lock);
4357}
4358
4359static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
4360 struct rpc_task *task)
4361{
4362 struct nfs4_delegation *dp = cb_to_delegation(cb);
4363
4364 if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID)
4365 return 1;
4366
4367 switch (task->tk_status) {
4368 case 0:
4369 return 1;
4370 case -NFS4ERR_DELAY:
4371 rpc_delay(task, 2 * HZ);
4372 return 0;
4373 case -EBADHANDLE:
4374 case -NFS4ERR_BAD_STATEID:
4375
4376
4377
4378
4379 if (dp->dl_retries--) {
4380 rpc_delay(task, 2 * HZ);
4381 return 0;
4382 }
4383
4384 default:
4385 return 1;
4386 }
4387}
4388
4389static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
4390{
4391 struct nfs4_delegation *dp = cb_to_delegation(cb);
4392
4393 nfs4_put_stid(&dp->dl_stid);
4394}
4395
4396static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
4397 .prepare = nfsd4_cb_recall_prepare,
4398 .done = nfsd4_cb_recall_done,
4399 .release = nfsd4_cb_recall_release,
4400};
4401
4402static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
4403{
4404
4405
4406
4407
4408
4409
4410
4411 refcount_inc(&dp->dl_stid.sc_count);
4412 nfsd4_run_cb(&dp->dl_recall);
4413}
4414
4415
4416static bool
4417nfsd_break_deleg_cb(struct file_lock *fl)
4418{
4419 bool ret = false;
4420 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
4421 struct nfs4_file *fp = dp->dl_stid.sc_file;
4422
4423
4424
4425
4426
4427
4428 fl->fl_break_time = 0;
4429
4430 spin_lock(&fp->fi_lock);
4431 fp->fi_had_conflict = true;
4432 nfsd_break_one_deleg(dp);
4433 spin_unlock(&fp->fi_lock);
4434 return ret;
4435}
4436
4437static int
4438nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
4439 struct list_head *dispose)
4440{
4441 if (arg & F_UNLCK)
4442 return lease_modify(onlist, arg, dispose);
4443 else
4444 return -EAGAIN;
4445}
4446
4447static const struct lock_manager_operations nfsd_lease_mng_ops = {
4448 .lm_break = nfsd_break_deleg_cb,
4449 .lm_change = nfsd_change_deleg_cb,
4450};
4451
4452static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
4453{
4454 if (nfsd4_has_session(cstate))
4455 return nfs_ok;
4456 if (seqid == so->so_seqid - 1)
4457 return nfserr_replay_me;
4458 if (seqid == so->so_seqid)
4459 return nfs_ok;
4460 return nfserr_bad_seqid;
4461}
4462
4463static __be32 lookup_clientid(clientid_t *clid,
4464 struct nfsd4_compound_state *cstate,
4465 struct nfsd_net *nn)
4466{
4467 struct nfs4_client *found;
4468
4469 if (cstate->clp) {
4470 found = cstate->clp;
4471 if (!same_clid(&found->cl_clientid, clid))
4472 return nfserr_stale_clientid;
4473 return nfs_ok;
4474 }
4475
4476 if (STALE_CLIENTID(clid, nn))
4477 return nfserr_stale_clientid;
4478
4479
4480
4481
4482
4483
4484 WARN_ON_ONCE(cstate->session);
4485 spin_lock(&nn->client_lock);
4486 found = find_confirmed_client(clid, false, nn);
4487 if (!found) {
4488 spin_unlock(&nn->client_lock);
4489 return nfserr_expired;
4490 }
4491 atomic_inc(&found->cl_rpc_users);
4492 spin_unlock(&nn->client_lock);
4493
4494
4495 cstate->clp = found;
4496 return nfs_ok;
4497}
4498
4499__be32
4500nfsd4_process_open1(struct nfsd4_compound_state *cstate,
4501 struct nfsd4_open *open, struct nfsd_net *nn)
4502{
4503 clientid_t *clientid = &open->op_clientid;
4504 struct nfs4_client *clp = NULL;
4505 unsigned int strhashval;
4506 struct nfs4_openowner *oo = NULL;
4507 __be32 status;
4508
4509 if (STALE_CLIENTID(&open->op_clientid, nn))
4510 return nfserr_stale_clientid;
4511
4512
4513
4514
4515 open->op_file = nfsd4_alloc_file();
4516 if (open->op_file == NULL)
4517 return nfserr_jukebox;
4518
4519 status = lookup_clientid(clientid, cstate, nn);
4520 if (status)
4521 return status;
4522 clp = cstate->clp;
4523
4524 strhashval = ownerstr_hashval(&open->op_owner);
4525 oo = find_openstateowner_str(strhashval, open, clp);
4526 open->op_openowner = oo;
4527 if (!oo) {
4528 goto new_owner;
4529 }
4530 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
4531
4532 release_openowner(oo);
4533 open->op_openowner = NULL;
4534 goto new_owner;
4535 }
4536 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
4537 if (status)
4538 return status;
4539 goto alloc_stateid;
4540new_owner:
4541 oo = alloc_init_open_stateowner(strhashval, open, cstate);
4542 if (oo == NULL)
4543 return nfserr_jukebox;
4544 open->op_openowner = oo;
4545alloc_stateid:
4546 open->op_stp = nfs4_alloc_open_stateid(clp);
4547 if (!open->op_stp)
4548 return nfserr_jukebox;
4549
4550 if (nfsd4_has_session(cstate) &&
4551 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
4552 open->op_odstate = alloc_clnt_odstate(clp);
4553 if (!open->op_odstate)
4554 return nfserr_jukebox;
4555 }
4556
4557 return nfs_ok;
4558}
4559
4560static inline __be32
4561nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
4562{
4563 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
4564 return nfserr_openmode;
4565 else
4566 return nfs_ok;
4567}
4568
4569static int share_access_to_flags(u32 share_access)
4570{
4571 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
4572}
4573
4574static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
4575{
4576 struct nfs4_stid *ret;
4577
4578 ret = find_stateid_by_type(cl, s,
4579 NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID);
4580 if (!ret)
4581 return NULL;
4582 return delegstateid(ret);
4583}
4584
4585static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
4586{
4587 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
4588 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
4589}
4590
4591static __be32
4592nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
4593 struct nfs4_delegation **dp)
4594{
4595 int flags;
4596 __be32 status = nfserr_bad_stateid;
4597 struct nfs4_delegation *deleg;
4598
4599 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
4600 if (deleg == NULL)
4601 goto out;
4602 if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {
4603 nfs4_put_stid(&deleg->dl_stid);
4604 if (cl->cl_minorversion)
4605 status = nfserr_deleg_revoked;
4606 goto out;
4607 }
4608 flags = share_access_to_flags(open->op_share_access);
4609 status = nfs4_check_delegmode(deleg, flags);
4610 if (status) {
4611 nfs4_put_stid(&deleg->dl_stid);
4612 goto out;
4613 }
4614 *dp = deleg;
4615out:
4616 if (!nfsd4_is_deleg_cur(open))
4617 return nfs_ok;
4618 if (status)
4619 return status;
4620 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4621 return nfs_ok;
4622}
4623
4624static inline int nfs4_access_to_access(u32 nfs4_access)
4625{
4626 int flags = 0;
4627
4628 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
4629 flags |= NFSD_MAY_READ;
4630 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
4631 flags |= NFSD_MAY_WRITE;
4632 return flags;
4633}
4634
4635static inline __be32
4636nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
4637 struct nfsd4_open *open)
4638{
4639 struct iattr iattr = {
4640 .ia_valid = ATTR_SIZE,
4641 .ia_size = 0,
4642 };
4643 if (!open->op_truncate)
4644 return 0;
4645 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
4646 return nfserr_inval;
4647 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
4648}
4649
4650static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
4651 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
4652 struct nfsd4_open *open)
4653{
4654 struct file *filp = NULL;
4655 __be32 status;
4656 int oflag = nfs4_access_to_omode(open->op_share_access);
4657 int access = nfs4_access_to_access(open->op_share_access);
4658 unsigned char old_access_bmap, old_deny_bmap;
4659
4660 spin_lock(&fp->fi_lock);
4661
4662
4663
4664
4665
4666 status = nfs4_file_check_deny(fp, open->op_share_deny);
4667 if (status != nfs_ok) {
4668 spin_unlock(&fp->fi_lock);
4669 goto out;
4670 }
4671
4672
4673 status = nfs4_file_get_access(fp, open->op_share_access);
4674 if (status != nfs_ok) {
4675 spin_unlock(&fp->fi_lock);
4676 goto out;
4677 }
4678
4679
4680 old_access_bmap = stp->st_access_bmap;
4681 set_access(open->op_share_access, stp);
4682
4683
4684 old_deny_bmap = stp->st_deny_bmap;
4685 set_deny(open->op_share_deny, stp);
4686 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4687
4688 if (!fp->fi_fds[oflag]) {
4689 spin_unlock(&fp->fi_lock);
4690 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
4691 if (status)
4692 goto out_put_access;
4693 spin_lock(&fp->fi_lock);
4694 if (!fp->fi_fds[oflag]) {
4695 fp->fi_fds[oflag] = filp;
4696 filp = NULL;
4697 }
4698 }
4699 spin_unlock(&fp->fi_lock);
4700 if (filp)
4701 fput(filp);
4702
4703 status = nfsd4_truncate(rqstp, cur_fh, open);
4704 if (status)
4705 goto out_put_access;
4706out:
4707 return status;
4708out_put_access:
4709 stp->st_access_bmap = old_access_bmap;
4710 nfs4_file_put_access(fp, open->op_share_access);
4711 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
4712 goto out;
4713}
4714
4715static __be32
4716nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
4717{
4718 __be32 status;
4719 unsigned char old_deny_bmap = stp->st_deny_bmap;
4720
4721 if (!test_access(open->op_share_access, stp))
4722 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
4723
4724
4725 spin_lock(&fp->fi_lock);
4726 status = nfs4_file_check_deny(fp, open->op_share_deny);
4727 if (status == nfs_ok) {
4728 set_deny(open->op_share_deny, stp);
4729 fp->fi_share_deny |=
4730 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4731 }
4732 spin_unlock(&fp->fi_lock);
4733
4734 if (status != nfs_ok)
4735 return status;
4736
4737 status = nfsd4_truncate(rqstp, cur_fh, open);
4738 if (status != nfs_ok)
4739 reset_union_bmap_deny(old_deny_bmap, stp);
4740 return status;
4741}
4742
4743
4744static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
4745{
4746 if (clp->cl_cb_state == NFSD4_CB_UP)
4747 return true;
4748
4749
4750
4751
4752
4753 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
4754}
4755
4756static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp,
4757 int flag)
4758{
4759 struct file_lock *fl;
4760
4761 fl = locks_alloc_lock();
4762 if (!fl)
4763 return NULL;
4764 fl->fl_lmops = &nfsd_lease_mng_ops;
4765 fl->fl_flags = FL_DELEG;
4766 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
4767 fl->fl_end = OFFSET_MAX;
4768 fl->fl_owner = (fl_owner_t)dp;
4769 fl->fl_pid = current->tgid;
4770 fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file;
4771 return fl;
4772}
4773
4774static struct nfs4_delegation *
4775nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
4776 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
4777{
4778 int status = 0;
4779 struct nfs4_delegation *dp;
4780 struct file *filp;
4781 struct file_lock *fl;
4782
4783
4784
4785
4786
4787
4788 if (fp->fi_had_conflict)
4789 return ERR_PTR(-EAGAIN);
4790
4791 filp = find_readable_file(fp);
4792 if (!filp) {
4793
4794 WARN_ON_ONCE(1);
4795 return ERR_PTR(-EBADF);
4796 }
4797 spin_lock(&state_lock);
4798 spin_lock(&fp->fi_lock);
4799 if (nfs4_delegation_exists(clp, fp))
4800 status = -EAGAIN;
4801 else if (!fp->fi_deleg_file) {
4802 fp->fi_deleg_file = filp;
4803
4804
4805 fp->fi_delegees = 1;
4806 filp = NULL;
4807 } else
4808 fp->fi_delegees++;
4809 spin_unlock(&fp->fi_lock);
4810 spin_unlock(&state_lock);
4811 if (filp)
4812 fput(filp);
4813 if (status)
4814 return ERR_PTR(status);
4815
4816 status = -ENOMEM;
4817 dp = alloc_init_deleg(clp, fp, fh, odstate);
4818 if (!dp)
4819 goto out_delegees;
4820
4821 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
4822 if (!fl)
4823 goto out_clnt_odstate;
4824
4825 status = vfs_setlease(fp->fi_deleg_file, fl->fl_type, &fl, NULL);
4826 if (fl)
4827 locks_free_lock(fl);
4828 if (status)
4829 goto out_clnt_odstate;
4830
4831 spin_lock(&state_lock);
4832 spin_lock(&fp->fi_lock);
4833 if (fp->fi_had_conflict)
4834 status = -EAGAIN;
4835 else
4836 status = hash_delegation_locked(dp, fp);
4837 spin_unlock(&fp->fi_lock);
4838 spin_unlock(&state_lock);
4839
4840 if (status)
4841 goto out_unlock;
4842
4843 return dp;
4844out_unlock:
4845 vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL, (void **)&dp);
4846out_clnt_odstate:
4847 put_clnt_odstate(dp->dl_clnt_odstate);
4848 nfs4_put_stid(&dp->dl_stid);
4849out_delegees:
4850 put_deleg_file(fp);
4851 return ERR_PTR(status);
4852}
4853
4854static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
4855{
4856 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4857 if (status == -EAGAIN)
4858 open->op_why_no_deleg = WND4_CONTENTION;
4859 else {
4860 open->op_why_no_deleg = WND4_RESOURCE;
4861 switch (open->op_deleg_want) {
4862 case NFS4_SHARE_WANT_READ_DELEG:
4863 case NFS4_SHARE_WANT_WRITE_DELEG:
4864 case NFS4_SHARE_WANT_ANY_DELEG:
4865 break;
4866 case NFS4_SHARE_WANT_CANCEL:
4867 open->op_why_no_deleg = WND4_CANCELLED;
4868 break;
4869 case NFS4_SHARE_WANT_NO_DELEG:
4870 WARN_ON_ONCE(1);
4871 }
4872 }
4873}
4874
4875
4876
4877
4878
4879
4880
4881static void
4882nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
4883 struct nfs4_ol_stateid *stp)
4884{
4885 struct nfs4_delegation *dp;
4886 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
4887 struct nfs4_client *clp = stp->st_stid.sc_client;
4888 int cb_up;
4889 int status = 0;
4890
4891 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
4892 open->op_recall = 0;
4893 switch (open->op_claim_type) {
4894 case NFS4_OPEN_CLAIM_PREVIOUS:
4895 if (!cb_up)
4896 open->op_recall = 1;
4897 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
4898 goto out_no_deleg;
4899 break;
4900 case NFS4_OPEN_CLAIM_NULL:
4901 case NFS4_OPEN_CLAIM_FH:
4902
4903
4904
4905
4906
4907 if (locks_in_grace(clp->net))
4908 goto out_no_deleg;
4909 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
4910 goto out_no_deleg;
4911
4912
4913
4914
4915
4916
4917
4918 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
4919 goto out_no_deleg;
4920 if (open->op_create == NFS4_OPEN_CREATE)
4921 goto out_no_deleg;
4922 break;
4923 default:
4924 goto out_no_deleg;
4925 }
4926 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
4927 if (IS_ERR(dp))
4928 goto out_no_deleg;
4929
4930 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
4931
4932 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
4933 STATEID_VAL(&dp->dl_stid.sc_stateid));
4934 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
4935 nfs4_put_stid(&dp->dl_stid);
4936 return;
4937out_no_deleg:
4938 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
4939 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
4940 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
4941 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4942 open->op_recall = 1;
4943 }
4944
4945
4946 if (open->op_deleg_want)
4947 nfsd4_open_deleg_none_ext(open, status);
4948 return;
4949}
4950
4951static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
4952 struct nfs4_delegation *dp)
4953{
4954 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
4955 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4956 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4957 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
4958 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
4959 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4960 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4961 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
4962 }
4963
4964
4965
4966
4967}
4968
4969__be32
4970nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
4971{
4972 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4973 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
4974 struct nfs4_file *fp = NULL;
4975 struct nfs4_ol_stateid *stp = NULL;
4976 struct nfs4_delegation *dp = NULL;
4977 __be32 status;
4978 bool new_stp = false;
4979
4980
4981
4982
4983
4984
4985 fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle);
4986 if (fp != open->op_file) {
4987 status = nfs4_check_deleg(cl, open, &dp);
4988 if (status)
4989 goto out;
4990 stp = nfsd4_find_and_lock_existing_open(fp, open);
4991 } else {
4992 open->op_file = NULL;
4993 status = nfserr_bad_stateid;
4994 if (nfsd4_is_deleg_cur(open))
4995 goto out;
4996 }
4997
4998 if (!stp) {
4999 stp = init_open_stateid(fp, open);
5000 if (!open->op_stp)
5001 new_stp = true;
5002 }
5003
5004
5005
5006
5007
5008
5009
5010 if (!new_stp) {
5011
5012 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
5013 if (status) {
5014 mutex_unlock(&stp->st_mutex);
5015 goto out;
5016 }
5017 } else {
5018 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
5019 if (status) {
5020 stp->st_stid.sc_type = NFS4_CLOSED_STID;
5021 release_open_stateid(stp);
5022 mutex_unlock(&stp->st_mutex);
5023 goto out;
5024 }
5025
5026 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
5027 open->op_odstate);
5028 if (stp->st_clnt_odstate == open->op_odstate)
5029 open->op_odstate = NULL;
5030 }
5031
5032 nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
5033 mutex_unlock(&stp->st_mutex);
5034
5035 if (nfsd4_has_session(&resp->cstate)) {
5036 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
5037 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
5038 open->op_why_no_deleg = WND4_NOT_WANTED;
5039 goto nodeleg;
5040 }
5041 }
5042
5043
5044
5045
5046
5047 nfs4_open_delegation(current_fh, open, stp);
5048nodeleg:
5049 status = nfs_ok;
5050
5051 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
5052 STATEID_VAL(&stp->st_stid.sc_stateid));
5053out:
5054
5055 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
5056 open->op_deleg_want)
5057 nfsd4_deleg_xgrade_none_ext(open, dp);
5058
5059 if (fp)
5060 put_nfs4_file(fp);
5061 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
5062 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
5063
5064
5065
5066 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
5067 if (nfsd4_has_session(&resp->cstate))
5068 open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;
5069 else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))
5070 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
5071
5072 if (dp)
5073 nfs4_put_stid(&dp->dl_stid);
5074 if (stp)
5075 nfs4_put_stid(&stp->st_stid);
5076
5077 return status;
5078}
5079
5080void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
5081 struct nfsd4_open *open)
5082{
5083 if (open->op_openowner) {
5084 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
5085
5086 nfsd4_cstate_assign_replay(cstate, so);
5087 nfs4_put_stateowner(so);
5088 }
5089 if (open->op_file)
5090 kmem_cache_free(file_slab, open->op_file);
5091 if (open->op_stp)
5092 nfs4_put_stid(&open->op_stp->st_stid);
5093 if (open->op_odstate)
5094 kmem_cache_free(odstate_slab, open->op_odstate);
5095}
5096
5097__be32
5098nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5099 union nfsd4_op_u *u)
5100{
5101 clientid_t *clid = &u->renew;
5102 struct nfs4_client *clp;
5103 __be32 status;
5104 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5105
5106 dprintk("process_renew(%08x/%08x): starting\n",
5107 clid->cl_boot, clid->cl_id);
5108 status = lookup_clientid(clid, cstate, nn);
5109 if (status)
5110 goto out;
5111 clp = cstate->clp;
5112 status = nfserr_cb_path_down;
5113 if (!list_empty(&clp->cl_delegations)
5114 && clp->cl_cb_state != NFSD4_CB_UP)
5115 goto out;
5116 status = nfs_ok;
5117out:
5118 return status;
5119}
5120
5121void
5122nfsd4_end_grace(struct nfsd_net *nn)
5123{
5124
5125 if (nn->grace_ended)
5126 return;
5127
5128 nn->grace_ended = true;
5129
5130
5131
5132
5133
5134
5135 nfsd4_record_grace_done(nn);
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145 locks_end_grace(&nn->nfsd4_manager);
5146
5147
5148
5149
5150
5151}
5152
5153
5154
5155
5156
5157static bool clients_still_reclaiming(struct nfsd_net *nn)
5158{
5159 unsigned long now = get_seconds();
5160 unsigned long double_grace_period_end = nn->boot_time +
5161 2 * nn->nfsd4_lease;
5162
5163 if (nn->track_reclaim_completes &&
5164 atomic_read(&nn->nr_reclaim_complete) ==
5165 nn->reclaim_str_hashtbl_size)
5166 return false;
5167 if (!nn->somebody_reclaimed)
5168 return false;
5169 nn->somebody_reclaimed = false;
5170
5171
5172
5173
5174 if (time_after(now, double_grace_period_end))
5175 return false;
5176 return true;
5177}
5178
5179static time_t
5180nfs4_laundromat(struct nfsd_net *nn)
5181{
5182 struct nfs4_client *clp;
5183 struct nfs4_openowner *oo;
5184 struct nfs4_delegation *dp;
5185 struct nfs4_ol_stateid *stp;
5186 struct nfsd4_blocked_lock *nbl;
5187 struct list_head *pos, *next, reaplist;
5188 time_t cutoff = get_seconds() - nn->nfsd4_lease;
5189 time_t t, new_timeo = nn->nfsd4_lease;
5190
5191 dprintk("NFSD: laundromat service - starting\n");
5192
5193 if (clients_still_reclaiming(nn)) {
5194 new_timeo = 0;
5195 goto out;
5196 }
5197 dprintk("NFSD: end of grace period\n");
5198 nfsd4_end_grace(nn);
5199 INIT_LIST_HEAD(&reaplist);
5200 spin_lock(&nn->client_lock);
5201 list_for_each_safe(pos, next, &nn->client_lru) {
5202 clp = list_entry(pos, struct nfs4_client, cl_lru);
5203 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
5204 t = clp->cl_time - cutoff;
5205 new_timeo = min(new_timeo, t);
5206 break;
5207 }
5208 if (mark_client_expired_locked(clp)) {
5209 dprintk("NFSD: client in use (clientid %08x)\n",
5210 clp->cl_clientid.cl_id);
5211 continue;
5212 }
5213 list_add(&clp->cl_lru, &reaplist);
5214 }
5215 spin_unlock(&nn->client_lock);
5216 list_for_each_safe(pos, next, &reaplist) {
5217 clp = list_entry(pos, struct nfs4_client, cl_lru);
5218 dprintk("NFSD: purging unused client (clientid %08x)\n",
5219 clp->cl_clientid.cl_id);
5220 list_del_init(&clp->cl_lru);
5221 expire_client(clp);
5222 }
5223 spin_lock(&state_lock);
5224 list_for_each_safe(pos, next, &nn->del_recall_lru) {
5225 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5226 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
5227 t = dp->dl_time - cutoff;
5228 new_timeo = min(new_timeo, t);
5229 break;
5230 }
5231 WARN_ON(!unhash_delegation_locked(dp));
5232 list_add(&dp->dl_recall_lru, &reaplist);
5233 }
5234 spin_unlock(&state_lock);
5235 while (!list_empty(&reaplist)) {
5236 dp = list_first_entry(&reaplist, struct nfs4_delegation,
5237 dl_recall_lru);
5238 list_del_init(&dp->dl_recall_lru);
5239 revoke_delegation(dp);
5240 }
5241
5242 spin_lock(&nn->client_lock);
5243 while (!list_empty(&nn->close_lru)) {
5244 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
5245 oo_close_lru);
5246 if (time_after((unsigned long)oo->oo_time,
5247 (unsigned long)cutoff)) {
5248 t = oo->oo_time - cutoff;
5249 new_timeo = min(new_timeo, t);
5250 break;
5251 }
5252 list_del_init(&oo->oo_close_lru);
5253 stp = oo->oo_last_closed_stid;
5254 oo->oo_last_closed_stid = NULL;
5255 spin_unlock(&nn->client_lock);
5256 nfs4_put_stid(&stp->st_stid);
5257 spin_lock(&nn->client_lock);
5258 }
5259 spin_unlock(&nn->client_lock);
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272 BUG_ON(!list_empty(&reaplist));
5273 spin_lock(&nn->blocked_locks_lock);
5274 while (!list_empty(&nn->blocked_locks_lru)) {
5275 nbl = list_first_entry(&nn->blocked_locks_lru,
5276 struct nfsd4_blocked_lock, nbl_lru);
5277 if (time_after((unsigned long)nbl->nbl_time,
5278 (unsigned long)cutoff)) {
5279 t = nbl->nbl_time - cutoff;
5280 new_timeo = min(new_timeo, t);
5281 break;
5282 }
5283 list_move(&nbl->nbl_lru, &reaplist);
5284 list_del_init(&nbl->nbl_list);
5285 }
5286 spin_unlock(&nn->blocked_locks_lock);
5287
5288 while (!list_empty(&reaplist)) {
5289 nbl = list_first_entry(&reaplist,
5290 struct nfsd4_blocked_lock, nbl_lru);
5291 list_del_init(&nbl->nbl_lru);
5292 free_blocked_lock(nbl);
5293 }
5294out:
5295 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
5296 return new_timeo;
5297}
5298
5299static struct workqueue_struct *laundry_wq;
5300static void laundromat_main(struct work_struct *);
5301
5302static void
5303laundromat_main(struct work_struct *laundry)
5304{
5305 time_t t;
5306 struct delayed_work *dwork = to_delayed_work(laundry);
5307 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
5308 laundromat_work);
5309
5310 t = nfs4_laundromat(nn);
5311 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
5312 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
5313}
5314
5315static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
5316{
5317 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
5318 return nfserr_bad_stateid;
5319 return nfs_ok;
5320}
5321
5322static inline int
5323access_permit_read(struct nfs4_ol_stateid *stp)
5324{
5325 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
5326 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
5327 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
5328}
5329
5330static inline int
5331access_permit_write(struct nfs4_ol_stateid *stp)
5332{
5333 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
5334 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
5335}
5336
5337static
5338__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
5339{
5340 __be32 status = nfserr_openmode;
5341
5342
5343 if (stp->st_openstp)
5344 stp = stp->st_openstp;
5345 if ((flags & WR_STATE) && !access_permit_write(stp))
5346 goto out;
5347 if ((flags & RD_STATE) && !access_permit_read(stp))
5348 goto out;
5349 status = nfs_ok;
5350out:
5351 return status;
5352}
5353
5354static inline __be32
5355check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
5356{
5357 if (ONE_STATEID(stateid) && (flags & RD_STATE))
5358 return nfs_ok;
5359 else if (opens_in_grace(net)) {
5360
5361
5362 return nfserr_grace;
5363 } else if (flags & WR_STATE)
5364 return nfs4_share_conflict(current_fh,
5365 NFS4_SHARE_DENY_WRITE);
5366 else
5367 return nfs4_share_conflict(current_fh,
5368 NFS4_SHARE_DENY_READ);
5369}
5370
5371
5372
5373
5374
5375static inline int
5376grace_disallows_io(struct net *net, struct inode *inode)
5377{
5378 return opens_in_grace(net) && mandatory_lock(inode);
5379}
5380
5381static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
5382{
5383
5384
5385
5386
5387 if (has_session && in->si_generation == 0)
5388 return nfs_ok;
5389
5390 if (in->si_generation == ref->si_generation)
5391 return nfs_ok;
5392
5393
5394 if (nfsd4_stateid_generation_after(in, ref))
5395 return nfserr_bad_stateid;
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406 return nfserr_old_stateid;
5407}
5408
5409static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session)
5410{
5411 __be32 ret;
5412
5413 spin_lock(&s->sc_lock);
5414 ret = nfsd4_verify_open_stid(s);
5415 if (ret == nfs_ok)
5416 ret = check_stateid_generation(in, &s->sc_stateid, has_session);
5417 spin_unlock(&s->sc_lock);
5418 return ret;
5419}
5420
5421static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
5422{
5423 if (ols->st_stateowner->so_is_open_owner &&
5424 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
5425 return nfserr_bad_stateid;
5426 return nfs_ok;
5427}
5428
5429static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
5430{
5431 struct nfs4_stid *s;
5432 __be32 status = nfserr_bad_stateid;
5433
5434 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
5435 CLOSE_STATEID(stateid))
5436 return status;
5437
5438 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
5439 char addr_str[INET6_ADDRSTRLEN];
5440 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
5441 sizeof(addr_str));
5442 pr_warn_ratelimited("NFSD: client %s testing state ID "
5443 "with incorrect client ID\n", addr_str);
5444 return status;
5445 }
5446 spin_lock(&cl->cl_lock);
5447 s = find_stateid_locked(cl, stateid);
5448 if (!s)
5449 goto out_unlock;
5450 status = nfsd4_stid_check_stateid_generation(stateid, s, 1);
5451 if (status)
5452 goto out_unlock;
5453 switch (s->sc_type) {
5454 case NFS4_DELEG_STID:
5455 status = nfs_ok;
5456 break;
5457 case NFS4_REVOKED_DELEG_STID:
5458 status = nfserr_deleg_revoked;
5459 break;
5460 case NFS4_OPEN_STID:
5461 case NFS4_LOCK_STID:
5462 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
5463 break;
5464 default:
5465 printk("unknown stateid type %x\n", s->sc_type);
5466
5467 case NFS4_CLOSED_STID:
5468 case NFS4_CLOSED_DELEG_STID:
5469 status = nfserr_bad_stateid;
5470 }
5471out_unlock:
5472 spin_unlock(&cl->cl_lock);
5473 return status;
5474}
5475
5476__be32
5477nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
5478 stateid_t *stateid, unsigned char typemask,
5479 struct nfs4_stid **s, struct nfsd_net *nn)
5480{
5481 __be32 status;
5482 bool return_revoked = false;
5483
5484
5485
5486
5487
5488 if (typemask & NFS4_REVOKED_DELEG_STID)
5489 return_revoked = true;
5490 else if (typemask & NFS4_DELEG_STID)
5491 typemask |= NFS4_REVOKED_DELEG_STID;
5492
5493 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
5494 CLOSE_STATEID(stateid))
5495 return nfserr_bad_stateid;
5496 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
5497 if (status == nfserr_stale_clientid) {
5498 if (cstate->session)
5499 return nfserr_bad_stateid;
5500 return nfserr_stale_stateid;
5501 }
5502 if (status)
5503 return status;
5504 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
5505 if (!*s)
5506 return nfserr_bad_stateid;
5507 if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
5508 nfs4_put_stid(*s);
5509 if (cstate->minorversion)
5510 return nfserr_deleg_revoked;
5511 return nfserr_bad_stateid;
5512 }
5513 return nfs_ok;
5514}
5515
5516static struct file *
5517nfs4_find_file(struct nfs4_stid *s, int flags)
5518{
5519 if (!s)
5520 return NULL;
5521
5522 switch (s->sc_type) {
5523 case NFS4_DELEG_STID:
5524 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
5525 return NULL;
5526 return get_file(s->sc_file->fi_deleg_file);
5527 case NFS4_OPEN_STID:
5528 case NFS4_LOCK_STID:
5529 if (flags & RD_STATE)
5530 return find_readable_file(s->sc_file);
5531 else
5532 return find_writeable_file(s->sc_file);
5533 break;
5534 }
5535
5536 return NULL;
5537}
5538
5539static __be32
5540nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags)
5541{
5542 __be32 status;
5543
5544 status = nfsd4_check_openowner_confirmed(ols);
5545 if (status)
5546 return status;
5547 return nfs4_check_openmode(ols, flags);
5548}
5549
5550static __be32
5551nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
5552 struct file **filpp, bool *tmp_file, int flags)
5553{
5554 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
5555 struct file *file;
5556 __be32 status;
5557
5558 file = nfs4_find_file(s, flags);
5559 if (file) {
5560 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
5561 acc | NFSD_MAY_OWNER_OVERRIDE);
5562 if (status) {
5563 fput(file);
5564 return status;
5565 }
5566
5567 *filpp = file;
5568 } else {
5569 status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp);
5570 if (status)
5571 return status;
5572
5573 if (tmp_file)
5574 *tmp_file = true;
5575 }
5576
5577 return 0;
5578}
5579
5580
5581
5582
5583__be32
5584nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
5585 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
5586 stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file)
5587{
5588 struct inode *ino = d_inode(fhp->fh_dentry);
5589 struct net *net = SVC_NET(rqstp);
5590 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5591 struct nfs4_stid *s = NULL;
5592 __be32 status;
5593
5594 if (filpp)
5595 *filpp = NULL;
5596 if (tmp_file)
5597 *tmp_file = false;
5598
5599 if (grace_disallows_io(net, ino))
5600 return nfserr_grace;
5601
5602 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
5603 status = check_special_stateids(net, fhp, stateid, flags);
5604 goto done;
5605 }
5606
5607 status = nfsd4_lookup_stateid(cstate, stateid,
5608 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
5609 &s, nn);
5610 if (status)
5611 return status;
5612 status = nfsd4_stid_check_stateid_generation(stateid, s,
5613 nfsd4_has_session(cstate));
5614 if (status)
5615 goto out;
5616
5617 switch (s->sc_type) {
5618 case NFS4_DELEG_STID:
5619 status = nfs4_check_delegmode(delegstateid(s), flags);
5620 break;
5621 case NFS4_OPEN_STID:
5622 case NFS4_LOCK_STID:
5623 status = nfs4_check_olstateid(openlockstateid(s), flags);
5624 break;
5625 default:
5626 status = nfserr_bad_stateid;
5627 break;
5628 }
5629 if (status)
5630 goto out;
5631 status = nfs4_check_fh(fhp, s);
5632
5633done:
5634 if (!status && filpp)
5635 status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
5636out:
5637 if (s)
5638 nfs4_put_stid(s);
5639 return status;
5640}
5641
5642
5643
5644
5645__be32
5646nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5647 union nfsd4_op_u *u)
5648{
5649 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
5650 struct nfsd4_test_stateid_id *stateid;
5651 struct nfs4_client *cl = cstate->session->se_client;
5652
5653 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
5654 stateid->ts_id_status =
5655 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
5656
5657 return nfs_ok;
5658}
5659
5660static __be32
5661nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
5662{
5663 struct nfs4_ol_stateid *stp = openlockstateid(s);
5664 __be32 ret;
5665
5666 ret = nfsd4_lock_ol_stateid(stp);
5667 if (ret)
5668 goto out_put_stid;
5669
5670 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5671 if (ret)
5672 goto out;
5673
5674 ret = nfserr_locks_held;
5675 if (check_for_locks(stp->st_stid.sc_file,
5676 lockowner(stp->st_stateowner)))
5677 goto out;
5678
5679 release_lock_stateid(stp);
5680 ret = nfs_ok;
5681
5682out:
5683 mutex_unlock(&stp->st_mutex);
5684out_put_stid:
5685 nfs4_put_stid(s);
5686 return ret;
5687}
5688
5689__be32
5690nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5691 union nfsd4_op_u *u)
5692{
5693 struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
5694 stateid_t *stateid = &free_stateid->fr_stateid;
5695 struct nfs4_stid *s;
5696 struct nfs4_delegation *dp;
5697 struct nfs4_client *cl = cstate->session->se_client;
5698 __be32 ret = nfserr_bad_stateid;
5699
5700 spin_lock(&cl->cl_lock);
5701 s = find_stateid_locked(cl, stateid);
5702 if (!s)
5703 goto out_unlock;
5704 spin_lock(&s->sc_lock);
5705 switch (s->sc_type) {
5706 case NFS4_DELEG_STID:
5707 ret = nfserr_locks_held;
5708 break;
5709 case NFS4_OPEN_STID:
5710 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5711 if (ret)
5712 break;
5713 ret = nfserr_locks_held;
5714 break;
5715 case NFS4_LOCK_STID:
5716 spin_unlock(&s->sc_lock);
5717 refcount_inc(&s->sc_count);
5718 spin_unlock(&cl->cl_lock);
5719 ret = nfsd4_free_lock_stateid(stateid, s);
5720 goto out;
5721 case NFS4_REVOKED_DELEG_STID:
5722 spin_unlock(&s->sc_lock);
5723 dp = delegstateid(s);
5724 list_del_init(&dp->dl_recall_lru);
5725 spin_unlock(&cl->cl_lock);
5726 nfs4_put_stid(s);
5727 ret = nfs_ok;
5728 goto out;
5729
5730 }
5731 spin_unlock(&s->sc_lock);
5732out_unlock:
5733 spin_unlock(&cl->cl_lock);
5734out:
5735 return ret;
5736}
5737
5738static inline int
5739setlkflg (int type)
5740{
5741 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
5742 RD_STATE : WR_STATE;
5743}
5744
5745static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
5746{
5747 struct svc_fh *current_fh = &cstate->current_fh;
5748 struct nfs4_stateowner *sop = stp->st_stateowner;
5749 __be32 status;
5750
5751 status = nfsd4_check_seqid(cstate, sop, seqid);
5752 if (status)
5753 return status;
5754 status = nfsd4_lock_ol_stateid(stp);
5755 if (status != nfs_ok)
5756 return status;
5757 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
5758 if (status == nfs_ok)
5759 status = nfs4_check_fh(current_fh, &stp->st_stid);
5760 if (status != nfs_ok)
5761 mutex_unlock(&stp->st_mutex);
5762 return status;
5763}
5764
5765
5766
5767
5768static __be32
5769nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5770 stateid_t *stateid, char typemask,
5771 struct nfs4_ol_stateid **stpp,
5772 struct nfsd_net *nn)
5773{
5774 __be32 status;
5775 struct nfs4_stid *s;
5776 struct nfs4_ol_stateid *stp = NULL;
5777
5778 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
5779 seqid, STATEID_VAL(stateid));
5780
5781 *stpp = NULL;
5782 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
5783 if (status)
5784 return status;
5785 stp = openlockstateid(s);
5786 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
5787
5788 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
5789 if (!status)
5790 *stpp = stp;
5791 else
5792 nfs4_put_stid(&stp->st_stid);
5793 return status;
5794}
5795
5796static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5797 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
5798{
5799 __be32 status;
5800 struct nfs4_openowner *oo;
5801 struct nfs4_ol_stateid *stp;
5802
5803 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
5804 NFS4_OPEN_STID, &stp, nn);
5805 if (status)
5806 return status;
5807 oo = openowner(stp->st_stateowner);
5808 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
5809 mutex_unlock(&stp->st_mutex);
5810 nfs4_put_stid(&stp->st_stid);
5811 return nfserr_bad_stateid;
5812 }
5813 *stpp = stp;
5814 return nfs_ok;
5815}
5816
5817__be32
5818nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5819 union nfsd4_op_u *u)
5820{
5821 struct nfsd4_open_confirm *oc = &u->open_confirm;
5822 __be32 status;
5823 struct nfs4_openowner *oo;
5824 struct nfs4_ol_stateid *stp;
5825 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5826
5827 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5828 cstate->current_fh.fh_dentry);
5829
5830 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
5831 if (status)
5832 return status;
5833
5834 status = nfs4_preprocess_seqid_op(cstate,
5835 oc->oc_seqid, &oc->oc_req_stateid,
5836 NFS4_OPEN_STID, &stp, nn);
5837 if (status)
5838 goto out;
5839 oo = openowner(stp->st_stateowner);
5840 status = nfserr_bad_stateid;
5841 if (oo->oo_flags & NFS4_OO_CONFIRMED) {
5842 mutex_unlock(&stp->st_mutex);
5843 goto put_stateid;
5844 }
5845 oo->oo_flags |= NFS4_OO_CONFIRMED;
5846 nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
5847 mutex_unlock(&stp->st_mutex);
5848 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
5849 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
5850
5851 nfsd4_client_record_create(oo->oo_owner.so_client);
5852 status = nfs_ok;
5853put_stateid:
5854 nfs4_put_stid(&stp->st_stid);
5855out:
5856 nfsd4_bump_seqid(cstate, status);
5857 return status;
5858}
5859
5860static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
5861{
5862 if (!test_access(access, stp))
5863 return;
5864 nfs4_file_put_access(stp->st_stid.sc_file, access);
5865 clear_access(access, stp);
5866}
5867
5868static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
5869{
5870 switch (to_access) {
5871 case NFS4_SHARE_ACCESS_READ:
5872 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
5873 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5874 break;
5875 case NFS4_SHARE_ACCESS_WRITE:
5876 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
5877 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5878 break;
5879 case NFS4_SHARE_ACCESS_BOTH:
5880 break;
5881 default:
5882 WARN_ON_ONCE(1);
5883 }
5884}
5885
5886__be32
5887nfsd4_open_downgrade(struct svc_rqst *rqstp,
5888 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
5889{
5890 struct nfsd4_open_downgrade *od = &u->open_downgrade;
5891 __be32 status;
5892 struct nfs4_ol_stateid *stp;
5893 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5894
5895 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5896 cstate->current_fh.fh_dentry);
5897
5898
5899 if (od->od_deleg_want)
5900 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
5901 od->od_deleg_want);
5902
5903 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
5904 &od->od_stateid, &stp, nn);
5905 if (status)
5906 goto out;
5907 status = nfserr_inval;
5908 if (!test_access(od->od_share_access, stp)) {
5909 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5910 stp->st_access_bmap, od->od_share_access);
5911 goto put_stateid;
5912 }
5913 if (!test_deny(od->od_share_deny, stp)) {
5914 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5915 stp->st_deny_bmap, od->od_share_deny);
5916 goto put_stateid;
5917 }
5918 nfs4_stateid_downgrade(stp, od->od_share_access);
5919 reset_union_bmap_deny(od->od_share_deny, stp);
5920 nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
5921 status = nfs_ok;
5922put_stateid:
5923 mutex_unlock(&stp->st_mutex);
5924 nfs4_put_stid(&stp->st_stid);
5925out:
5926 nfsd4_bump_seqid(cstate, status);
5927 return status;
5928}
5929
5930static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
5931{
5932 struct nfs4_client *clp = s->st_stid.sc_client;
5933 bool unhashed;
5934 LIST_HEAD(reaplist);
5935
5936 spin_lock(&clp->cl_lock);
5937 unhashed = unhash_open_stateid(s, &reaplist);
5938
5939 if (clp->cl_minorversion) {
5940 if (unhashed)
5941 put_ol_stateid_locked(s, &reaplist);
5942 spin_unlock(&clp->cl_lock);
5943 free_ol_stateid_reaplist(&reaplist);
5944 } else {
5945 spin_unlock(&clp->cl_lock);
5946 free_ol_stateid_reaplist(&reaplist);
5947 if (unhashed)
5948 move_to_close_lru(s, clp->net);
5949 }
5950}
5951
5952
5953
5954
5955__be32
5956nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5957 union nfsd4_op_u *u)
5958{
5959 struct nfsd4_close *close = &u->close;
5960 __be32 status;
5961 struct nfs4_ol_stateid *stp;
5962 struct net *net = SVC_NET(rqstp);
5963 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5964
5965 dprintk("NFSD: nfsd4_close on file %pd\n",
5966 cstate->current_fh.fh_dentry);
5967
5968 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
5969 &close->cl_stateid,
5970 NFS4_OPEN_STID|NFS4_CLOSED_STID,
5971 &stp, nn);
5972 nfsd4_bump_seqid(cstate, status);
5973 if (status)
5974 goto out;
5975
5976 stp->st_stid.sc_type = NFS4_CLOSED_STID;
5977
5978
5979
5980
5981
5982
5983
5984 nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
5985
5986 nfsd4_close_open_stateid(stp);
5987 mutex_unlock(&stp->st_mutex);
5988
5989
5990
5991
5992
5993
5994
5995
5996 memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));
5997
5998
5999 nfs4_put_stid(&stp->st_stid);
6000out:
6001 return status;
6002}
6003
6004__be32
6005nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6006 union nfsd4_op_u *u)
6007{
6008 struct nfsd4_delegreturn *dr = &u->delegreturn;
6009 struct nfs4_delegation *dp;
6010 stateid_t *stateid = &dr->dr_stateid;
6011 struct nfs4_stid *s;
6012 __be32 status;
6013 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6014
6015 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
6016 return status;
6017
6018 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
6019 if (status)
6020 goto out;
6021 dp = delegstateid(s);
6022 status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));
6023 if (status)
6024 goto put_stateid;
6025
6026 destroy_delegation(dp);
6027put_stateid:
6028 nfs4_put_stid(&dp->dl_stid);
6029out:
6030 return status;
6031}
6032
6033static inline u64
6034end_offset(u64 start, u64 len)
6035{
6036 u64 end;
6037
6038 end = start + len;
6039 return end >= start ? end: NFS4_MAX_UINT64;
6040}
6041
6042
6043static inline u64
6044last_byte_offset(u64 start, u64 len)
6045{
6046 u64 end;
6047
6048 WARN_ON_ONCE(!len);
6049 end = start + len;
6050 return end > start ? end - 1: NFS4_MAX_UINT64;
6051}
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061static inline void
6062nfs4_transform_lock_offset(struct file_lock *lock)
6063{
6064 if (lock->fl_start < 0)
6065 lock->fl_start = OFFSET_MAX;
6066 if (lock->fl_end < 0)
6067 lock->fl_end = OFFSET_MAX;
6068}
6069
6070static fl_owner_t
6071nfsd4_fl_get_owner(fl_owner_t owner)
6072{
6073 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
6074
6075 nfs4_get_stateowner(&lo->lo_owner);
6076 return owner;
6077}
6078
6079static void
6080nfsd4_fl_put_owner(fl_owner_t owner)
6081{
6082 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
6083
6084 if (lo)
6085 nfs4_put_stateowner(&lo->lo_owner);
6086}
6087
6088static void
6089nfsd4_lm_notify(struct file_lock *fl)
6090{
6091 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner;
6092 struct net *net = lo->lo_owner.so_client->net;
6093 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6094 struct nfsd4_blocked_lock *nbl = container_of(fl,
6095 struct nfsd4_blocked_lock, nbl_lock);
6096 bool queue = false;
6097
6098
6099 spin_lock(&nn->blocked_locks_lock);
6100 if (!list_empty(&nbl->nbl_list)) {
6101 list_del_init(&nbl->nbl_list);
6102 list_del_init(&nbl->nbl_lru);
6103 queue = true;
6104 }
6105 spin_unlock(&nn->blocked_locks_lock);
6106
6107 if (queue)
6108 nfsd4_run_cb(&nbl->nbl_cb);
6109}
6110
6111static const struct lock_manager_operations nfsd_posix_mng_ops = {
6112 .lm_notify = nfsd4_lm_notify,
6113 .lm_get_owner = nfsd4_fl_get_owner,
6114 .lm_put_owner = nfsd4_fl_put_owner,
6115};
6116
6117static inline void
6118nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
6119{
6120 struct nfs4_lockowner *lo;
6121
6122 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
6123 lo = (struct nfs4_lockowner *) fl->fl_owner;
6124 xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,
6125 GFP_KERNEL);
6126 if (!deny->ld_owner.data)
6127
6128 goto nevermind;
6129 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
6130 } else {
6131nevermind:
6132 deny->ld_owner.len = 0;
6133 deny->ld_owner.data = NULL;
6134 deny->ld_clientid.cl_boot = 0;
6135 deny->ld_clientid.cl_id = 0;
6136 }
6137 deny->ld_start = fl->fl_start;
6138 deny->ld_length = NFS4_MAX_UINT64;
6139 if (fl->fl_end != NFS4_MAX_UINT64)
6140 deny->ld_length = fl->fl_end - fl->fl_start + 1;
6141 deny->ld_type = NFS4_READ_LT;
6142 if (fl->fl_type != F_RDLCK)
6143 deny->ld_type = NFS4_WRITE_LT;
6144}
6145
6146static struct nfs4_lockowner *
6147find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner)
6148{
6149 unsigned int strhashval = ownerstr_hashval(owner);
6150 struct nfs4_stateowner *so;
6151
6152 lockdep_assert_held(&clp->cl_lock);
6153
6154 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
6155 so_strhash) {
6156 if (so->so_is_open_owner)
6157 continue;
6158 if (same_owner_str(so, owner))
6159 return lockowner(nfs4_get_stateowner(so));
6160 }
6161 return NULL;
6162}
6163
6164static struct nfs4_lockowner *
6165find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner)
6166{
6167 struct nfs4_lockowner *lo;
6168
6169 spin_lock(&clp->cl_lock);
6170 lo = find_lockowner_str_locked(clp, owner);
6171 spin_unlock(&clp->cl_lock);
6172 return lo;
6173}
6174
6175static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
6176{
6177 unhash_lockowner_locked(lockowner(sop));
6178}
6179
6180static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
6181{
6182 struct nfs4_lockowner *lo = lockowner(sop);
6183
6184 kmem_cache_free(lockowner_slab, lo);
6185}
6186
6187static const struct nfs4_stateowner_operations lockowner_ops = {
6188 .so_unhash = nfs4_unhash_lockowner,
6189 .so_free = nfs4_free_lockowner,
6190};
6191
6192
6193
6194
6195
6196
6197
6198
6199static struct nfs4_lockowner *
6200alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
6201 struct nfs4_ol_stateid *open_stp,
6202 struct nfsd4_lock *lock)
6203{
6204 struct nfs4_lockowner *lo, *ret;
6205
6206 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
6207 if (!lo)
6208 return NULL;
6209 INIT_LIST_HEAD(&lo->lo_blocked);
6210 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
6211 lo->lo_owner.so_is_open_owner = 0;
6212 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
6213 lo->lo_owner.so_ops = &lockowner_ops;
6214 spin_lock(&clp->cl_lock);
6215 ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);
6216 if (ret == NULL) {
6217 list_add(&lo->lo_owner.so_strhash,
6218 &clp->cl_ownerstr_hashtbl[strhashval]);
6219 ret = lo;
6220 } else
6221 nfs4_free_stateowner(&lo->lo_owner);
6222
6223 spin_unlock(&clp->cl_lock);
6224 return ret;
6225}
6226
6227static struct nfs4_ol_stateid *
6228find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
6229{
6230 struct nfs4_ol_stateid *lst;
6231 struct nfs4_client *clp = lo->lo_owner.so_client;
6232
6233 lockdep_assert_held(&clp->cl_lock);
6234
6235 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
6236 if (lst->st_stid.sc_type != NFS4_LOCK_STID)
6237 continue;
6238 if (lst->st_stid.sc_file == fp) {
6239 refcount_inc(&lst->st_stid.sc_count);
6240 return lst;
6241 }
6242 }
6243 return NULL;
6244}
6245
6246static struct nfs4_ol_stateid *
6247init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
6248 struct nfs4_file *fp, struct inode *inode,
6249 struct nfs4_ol_stateid *open_stp)
6250{
6251 struct nfs4_client *clp = lo->lo_owner.so_client;
6252 struct nfs4_ol_stateid *retstp;
6253
6254 mutex_init(&stp->st_mutex);
6255 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
6256retry:
6257 spin_lock(&clp->cl_lock);
6258 spin_lock(&fp->fi_lock);
6259 retstp = find_lock_stateid(lo, fp);
6260 if (retstp)
6261 goto out_unlock;
6262
6263 refcount_inc(&stp->st_stid.sc_count);
6264 stp->st_stid.sc_type = NFS4_LOCK_STID;
6265 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
6266 get_nfs4_file(fp);
6267 stp->st_stid.sc_file = fp;
6268 stp->st_access_bmap = 0;
6269 stp->st_deny_bmap = open_stp->st_deny_bmap;
6270 stp->st_openstp = open_stp;
6271 list_add(&stp->st_locks, &open_stp->st_locks);
6272 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
6273 list_add(&stp->st_perfile, &fp->fi_stateids);
6274out_unlock:
6275 spin_unlock(&fp->fi_lock);
6276 spin_unlock(&clp->cl_lock);
6277 if (retstp) {
6278 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
6279 nfs4_put_stid(&retstp->st_stid);
6280 goto retry;
6281 }
6282
6283 mutex_unlock(&stp->st_mutex);
6284 stp = retstp;
6285 }
6286 return stp;
6287}
6288
6289static struct nfs4_ol_stateid *
6290find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
6291 struct inode *inode, struct nfs4_ol_stateid *ost,
6292 bool *new)
6293{
6294 struct nfs4_stid *ns = NULL;
6295 struct nfs4_ol_stateid *lst;
6296 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
6297 struct nfs4_client *clp = oo->oo_owner.so_client;
6298
6299 *new = false;
6300 spin_lock(&clp->cl_lock);
6301 lst = find_lock_stateid(lo, fi);
6302 spin_unlock(&clp->cl_lock);
6303 if (lst != NULL) {
6304 if (nfsd4_lock_ol_stateid(lst) == nfs_ok)
6305 goto out;
6306 nfs4_put_stid(&lst->st_stid);
6307 }
6308 ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid);
6309 if (ns == NULL)
6310 return NULL;
6311
6312 lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost);
6313 if (lst == openlockstateid(ns))
6314 *new = true;
6315 else
6316 nfs4_put_stid(ns);
6317out:
6318 return lst;
6319}
6320
6321static int
6322check_lock_length(u64 offset, u64 length)
6323{
6324 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
6325 (length > ~offset)));
6326}
6327
6328static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
6329{
6330 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
6331
6332 lockdep_assert_held(&fp->fi_lock);
6333
6334 if (test_access(access, lock_stp))
6335 return;
6336 __nfs4_file_get_access(fp, access);
6337 set_access(access, lock_stp);
6338}
6339
6340static __be32
6341lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
6342 struct nfs4_ol_stateid *ost,
6343 struct nfsd4_lock *lock,
6344 struct nfs4_ol_stateid **plst, bool *new)
6345{
6346 __be32 status;
6347 struct nfs4_file *fi = ost->st_stid.sc_file;
6348 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
6349 struct nfs4_client *cl = oo->oo_owner.so_client;
6350 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
6351 struct nfs4_lockowner *lo;
6352 struct nfs4_ol_stateid *lst;
6353 unsigned int strhashval;
6354
6355 lo = find_lockowner_str(cl, &lock->lk_new_owner);
6356 if (!lo) {
6357 strhashval = ownerstr_hashval(&lock->lk_new_owner);
6358 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
6359 if (lo == NULL)
6360 return nfserr_jukebox;
6361 } else {
6362
6363 status = nfserr_bad_seqid;
6364 if (!cstate->minorversion &&
6365 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
6366 goto out;
6367 }
6368
6369 lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
6370 if (lst == NULL) {
6371 status = nfserr_jukebox;
6372 goto out;
6373 }
6374
6375 status = nfs_ok;
6376 *plst = lst;
6377out:
6378 nfs4_put_stateowner(&lo->lo_owner);
6379 return status;
6380}
6381
6382
6383
6384
6385__be32
6386nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6387 union nfsd4_op_u *u)
6388{
6389 struct nfsd4_lock *lock = &u->lock;
6390 struct nfs4_openowner *open_sop = NULL;
6391 struct nfs4_lockowner *lock_sop = NULL;
6392 struct nfs4_ol_stateid *lock_stp = NULL;
6393 struct nfs4_ol_stateid *open_stp = NULL;
6394 struct nfs4_file *fp;
6395 struct file *filp = NULL;
6396 struct nfsd4_blocked_lock *nbl = NULL;
6397 struct file_lock *file_lock = NULL;
6398 struct file_lock *conflock = NULL;
6399 __be32 status = 0;
6400 int lkflg;
6401 int err;
6402 bool new = false;
6403 unsigned char fl_type;
6404 unsigned int fl_flags = FL_POSIX;
6405 struct net *net = SVC_NET(rqstp);
6406 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6407
6408 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
6409 (long long) lock->lk_offset,
6410 (long long) lock->lk_length);
6411
6412 if (check_lock_length(lock->lk_offset, lock->lk_length))
6413 return nfserr_inval;
6414
6415 if ((status = fh_verify(rqstp, &cstate->current_fh,
6416 S_IFREG, NFSD_MAY_LOCK))) {
6417 dprintk("NFSD: nfsd4_lock: permission denied!\n");
6418 return status;
6419 }
6420
6421 if (lock->lk_is_new) {
6422 if (nfsd4_has_session(cstate))
6423
6424 memcpy(&lock->lk_new_clientid,
6425 &cstate->session->se_client->cl_clientid,
6426 sizeof(clientid_t));
6427
6428 status = nfserr_stale_clientid;
6429 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
6430 goto out;
6431
6432
6433 status = nfs4_preprocess_confirmed_seqid_op(cstate,
6434 lock->lk_new_open_seqid,
6435 &lock->lk_new_open_stateid,
6436 &open_stp, nn);
6437 if (status)
6438 goto out;
6439 mutex_unlock(&open_stp->st_mutex);
6440 open_sop = openowner(open_stp->st_stateowner);
6441 status = nfserr_bad_stateid;
6442 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
6443 &lock->lk_new_clientid))
6444 goto out;
6445 status = lookup_or_create_lock_state(cstate, open_stp, lock,
6446 &lock_stp, &new);
6447 } else {
6448 status = nfs4_preprocess_seqid_op(cstate,
6449 lock->lk_old_lock_seqid,
6450 &lock->lk_old_lock_stateid,
6451 NFS4_LOCK_STID, &lock_stp, nn);
6452 }
6453 if (status)
6454 goto out;
6455 lock_sop = lockowner(lock_stp->st_stateowner);
6456
6457 lkflg = setlkflg(lock->lk_type);
6458 status = nfs4_check_openmode(lock_stp, lkflg);
6459 if (status)
6460 goto out;
6461
6462 status = nfserr_grace;
6463 if (locks_in_grace(net) && !lock->lk_reclaim)
6464 goto out;
6465 status = nfserr_no_grace;
6466 if (!locks_in_grace(net) && lock->lk_reclaim)
6467 goto out;
6468
6469 fp = lock_stp->st_stid.sc_file;
6470 switch (lock->lk_type) {
6471 case NFS4_READW_LT:
6472 if (nfsd4_has_session(cstate))
6473 fl_flags |= FL_SLEEP;
6474
6475 case NFS4_READ_LT:
6476 spin_lock(&fp->fi_lock);
6477 filp = find_readable_file_locked(fp);
6478 if (filp)
6479 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
6480 spin_unlock(&fp->fi_lock);
6481 fl_type = F_RDLCK;
6482 break;
6483 case NFS4_WRITEW_LT:
6484 if (nfsd4_has_session(cstate))
6485 fl_flags |= FL_SLEEP;
6486
6487 case NFS4_WRITE_LT:
6488 spin_lock(&fp->fi_lock);
6489 filp = find_writeable_file_locked(fp);
6490 if (filp)
6491 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
6492 spin_unlock(&fp->fi_lock);
6493 fl_type = F_WRLCK;
6494 break;
6495 default:
6496 status = nfserr_inval;
6497 goto out;
6498 }
6499
6500 if (!filp) {
6501 status = nfserr_openmode;
6502 goto out;
6503 }
6504
6505 nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
6506 if (!nbl) {
6507 dprintk("NFSD: %s: unable to allocate block!\n", __func__);
6508 status = nfserr_jukebox;
6509 goto out;
6510 }
6511
6512 file_lock = &nbl->nbl_lock;
6513 file_lock->fl_type = fl_type;
6514 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
6515 file_lock->fl_pid = current->tgid;
6516 file_lock->fl_file = filp;
6517 file_lock->fl_flags = fl_flags;
6518 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6519 file_lock->fl_start = lock->lk_offset;
6520 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
6521 nfs4_transform_lock_offset(file_lock);
6522
6523 conflock = locks_alloc_lock();
6524 if (!conflock) {
6525 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6526 status = nfserr_jukebox;
6527 goto out;
6528 }
6529
6530 if (fl_flags & FL_SLEEP) {
6531 nbl->nbl_time = jiffies;
6532 spin_lock(&nn->blocked_locks_lock);
6533 list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
6534 list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
6535 spin_unlock(&nn->blocked_locks_lock);
6536 }
6537
6538 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
6539 switch (err) {
6540 case 0:
6541 nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);
6542 status = 0;
6543 if (lock->lk_reclaim)
6544 nn->somebody_reclaimed = true;
6545 break;
6546 case FILE_LOCK_DEFERRED:
6547 nbl = NULL;
6548
6549 case -EAGAIN:
6550 status = nfserr_denied;
6551 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
6552 nfs4_set_lock_denied(conflock, &lock->lk_denied);
6553 break;
6554 case -EDEADLK:
6555 status = nfserr_deadlock;
6556 break;
6557 default:
6558 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
6559 status = nfserrno(err);
6560 break;
6561 }
6562out:
6563 if (nbl) {
6564
6565 if (fl_flags & FL_SLEEP) {
6566 spin_lock(&nn->blocked_locks_lock);
6567 list_del_init(&nbl->nbl_list);
6568 list_del_init(&nbl->nbl_lru);
6569 spin_unlock(&nn->blocked_locks_lock);
6570 }
6571 free_blocked_lock(nbl);
6572 }
6573 if (filp)
6574 fput(filp);
6575 if (lock_stp) {
6576
6577 if (cstate->replay_owner &&
6578 cstate->replay_owner != &lock_sop->lo_owner &&
6579 seqid_mutating_err(ntohl(status)))
6580 lock_sop->lo_owner.so_seqid++;
6581
6582
6583
6584
6585
6586 if (status && new)
6587 release_lock_stateid(lock_stp);
6588
6589 mutex_unlock(&lock_stp->st_mutex);
6590
6591 nfs4_put_stid(&lock_stp->st_stid);
6592 }
6593 if (open_stp)
6594 nfs4_put_stid(&open_stp->st_stid);
6595 nfsd4_bump_seqid(cstate, status);
6596 if (conflock)
6597 locks_free_lock(conflock);
6598 return status;
6599}
6600
6601
6602
6603
6604
6605
6606
6607static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
6608{
6609 struct file *file;
6610 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
6611 if (!err) {
6612 err = nfserrno(vfs_test_lock(file, lock));
6613 fput(file);
6614 }
6615 return err;
6616}
6617
6618
6619
6620
6621__be32
6622nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6623 union nfsd4_op_u *u)
6624{
6625 struct nfsd4_lockt *lockt = &u->lockt;
6626 struct file_lock *file_lock = NULL;
6627 struct nfs4_lockowner *lo = NULL;
6628 __be32 status;
6629 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6630
6631 if (locks_in_grace(SVC_NET(rqstp)))
6632 return nfserr_grace;
6633
6634 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
6635 return nfserr_inval;
6636
6637 if (!nfsd4_has_session(cstate)) {
6638 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
6639 if (status)
6640 goto out;
6641 }
6642
6643 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
6644 goto out;
6645
6646 file_lock = locks_alloc_lock();
6647 if (!file_lock) {
6648 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6649 status = nfserr_jukebox;
6650 goto out;
6651 }
6652
6653 switch (lockt->lt_type) {
6654 case NFS4_READ_LT:
6655 case NFS4_READW_LT:
6656 file_lock->fl_type = F_RDLCK;
6657 break;
6658 case NFS4_WRITE_LT:
6659 case NFS4_WRITEW_LT:
6660 file_lock->fl_type = F_WRLCK;
6661 break;
6662 default:
6663 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
6664 status = nfserr_inval;
6665 goto out;
6666 }
6667
6668 lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);
6669 if (lo)
6670 file_lock->fl_owner = (fl_owner_t)lo;
6671 file_lock->fl_pid = current->tgid;
6672 file_lock->fl_flags = FL_POSIX;
6673
6674 file_lock->fl_start = lockt->lt_offset;
6675 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
6676
6677 nfs4_transform_lock_offset(file_lock);
6678
6679 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
6680 if (status)
6681 goto out;
6682
6683 if (file_lock->fl_type != F_UNLCK) {
6684 status = nfserr_denied;
6685 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
6686 }
6687out:
6688 if (lo)
6689 nfs4_put_stateowner(&lo->lo_owner);
6690 if (file_lock)
6691 locks_free_lock(file_lock);
6692 return status;
6693}
6694
6695__be32
6696nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6697 union nfsd4_op_u *u)
6698{
6699 struct nfsd4_locku *locku = &u->locku;
6700 struct nfs4_ol_stateid *stp;
6701 struct file *filp = NULL;
6702 struct file_lock *file_lock = NULL;
6703 __be32 status;
6704 int err;
6705 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6706
6707 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
6708 (long long) locku->lu_offset,
6709 (long long) locku->lu_length);
6710
6711 if (check_lock_length(locku->lu_offset, locku->lu_length))
6712 return nfserr_inval;
6713
6714 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
6715 &locku->lu_stateid, NFS4_LOCK_STID,
6716 &stp, nn);
6717 if (status)
6718 goto out;
6719 filp = find_any_file(stp->st_stid.sc_file);
6720 if (!filp) {
6721 status = nfserr_lock_range;
6722 goto put_stateid;
6723 }
6724 file_lock = locks_alloc_lock();
6725 if (!file_lock) {
6726 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6727 status = nfserr_jukebox;
6728 goto fput;
6729 }
6730
6731 file_lock->fl_type = F_UNLCK;
6732 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
6733 file_lock->fl_pid = current->tgid;
6734 file_lock->fl_file = filp;
6735 file_lock->fl_flags = FL_POSIX;
6736 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6737 file_lock->fl_start = locku->lu_offset;
6738
6739 file_lock->fl_end = last_byte_offset(locku->lu_offset,
6740 locku->lu_length);
6741 nfs4_transform_lock_offset(file_lock);
6742
6743 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
6744 if (err) {
6745 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
6746 goto out_nfserr;
6747 }
6748 nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);
6749fput:
6750 fput(filp);
6751put_stateid:
6752 mutex_unlock(&stp->st_mutex);
6753 nfs4_put_stid(&stp->st_stid);
6754out:
6755 nfsd4_bump_seqid(cstate, status);
6756 if (file_lock)
6757 locks_free_lock(file_lock);
6758 return status;
6759
6760out_nfserr:
6761 status = nfserrno(err);
6762 goto fput;
6763}
6764
6765
6766
6767
6768
6769
6770static bool
6771check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
6772{
6773 struct file_lock *fl;
6774 int status = false;
6775 struct file *filp = find_any_file(fp);
6776 struct inode *inode;
6777 struct file_lock_context *flctx;
6778
6779 if (!filp) {
6780
6781 WARN_ON_ONCE(1);
6782 return status;
6783 }
6784
6785 inode = locks_inode(filp);
6786 flctx = inode->i_flctx;
6787
6788 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
6789 spin_lock(&flctx->flc_lock);
6790 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
6791 if (fl->fl_owner == (fl_owner_t)lowner) {
6792 status = true;
6793 break;
6794 }
6795 }
6796 spin_unlock(&flctx->flc_lock);
6797 }
6798 fput(filp);
6799 return status;
6800}
6801
6802__be32
6803nfsd4_release_lockowner(struct svc_rqst *rqstp,
6804 struct nfsd4_compound_state *cstate,
6805 union nfsd4_op_u *u)
6806{
6807 struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
6808 clientid_t *clid = &rlockowner->rl_clientid;
6809 struct nfs4_stateowner *sop;
6810 struct nfs4_lockowner *lo = NULL;
6811 struct nfs4_ol_stateid *stp;
6812 struct xdr_netobj *owner = &rlockowner->rl_owner;
6813 unsigned int hashval = ownerstr_hashval(owner);
6814 __be32 status;
6815 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6816 struct nfs4_client *clp;
6817 LIST_HEAD (reaplist);
6818
6819 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
6820 clid->cl_boot, clid->cl_id);
6821
6822 status = lookup_clientid(clid, cstate, nn);
6823 if (status)
6824 return status;
6825
6826 clp = cstate->clp;
6827
6828 spin_lock(&clp->cl_lock);
6829 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
6830 so_strhash) {
6831
6832 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
6833 continue;
6834
6835
6836 lo = lockowner(sop);
6837 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
6838 if (check_for_locks(stp->st_stid.sc_file, lo)) {
6839 status = nfserr_locks_held;
6840 spin_unlock(&clp->cl_lock);
6841 return status;
6842 }
6843 }
6844
6845 nfs4_get_stateowner(sop);
6846 break;
6847 }
6848 if (!lo) {
6849 spin_unlock(&clp->cl_lock);
6850 return status;
6851 }
6852
6853 unhash_lockowner_locked(lo);
6854 while (!list_empty(&lo->lo_owner.so_stateids)) {
6855 stp = list_first_entry(&lo->lo_owner.so_stateids,
6856 struct nfs4_ol_stateid,
6857 st_perstateowner);
6858 WARN_ON(!unhash_lock_stateid(stp));
6859 put_ol_stateid_locked(stp, &reaplist);
6860 }
6861 spin_unlock(&clp->cl_lock);
6862 free_ol_stateid_reaplist(&reaplist);
6863 remove_blocked_locks(lo);
6864 nfs4_put_stateowner(&lo->lo_owner);
6865
6866 return status;
6867}
6868
6869static inline struct nfs4_client_reclaim *
6870alloc_reclaim(void)
6871{
6872 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
6873}
6874
6875bool
6876nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn)
6877{
6878 struct nfs4_client_reclaim *crp;
6879
6880 crp = nfsd4_find_reclaim_client(name, nn);
6881 return (crp && crp->cr_clp);
6882}
6883
6884
6885
6886
6887
6888
6889
6890struct nfs4_client_reclaim *
6891nfs4_client_to_reclaim(struct xdr_netobj name, struct nfsd_net *nn)
6892{
6893 unsigned int strhashval;
6894 struct nfs4_client_reclaim *crp;
6895
6896 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", name.len, name.data);
6897 crp = alloc_reclaim();
6898 if (crp) {
6899 strhashval = clientstr_hashval(name);
6900 INIT_LIST_HEAD(&crp->cr_strhash);
6901 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
6902 crp->cr_name.data = name.data;
6903 crp->cr_name.len = name.len;
6904 crp->cr_clp = NULL;
6905 nn->reclaim_str_hashtbl_size++;
6906 }
6907 return crp;
6908}
6909
6910void
6911nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
6912{
6913 list_del(&crp->cr_strhash);
6914 kfree(crp->cr_name.data);
6915 kfree(crp);
6916 nn->reclaim_str_hashtbl_size--;
6917}
6918
6919void
6920nfs4_release_reclaim(struct nfsd_net *nn)
6921{
6922 struct nfs4_client_reclaim *crp = NULL;
6923 int i;
6924
6925 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6926 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
6927 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
6928 struct nfs4_client_reclaim, cr_strhash);
6929 nfs4_remove_reclaim_record(crp, nn);
6930 }
6931 }
6932 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
6933}
6934
6935
6936
6937struct nfs4_client_reclaim *
6938nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn)
6939{
6940 unsigned int strhashval;
6941 struct nfs4_client_reclaim *crp = NULL;
6942
6943 dprintk("NFSD: nfs4_find_reclaim_client for name %.*s\n", name.len, name.data);
6944
6945 strhashval = clientstr_hashval(name);
6946 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
6947 if (compare_blob(&crp->cr_name, &name) == 0) {
6948 return crp;
6949 }
6950 }
6951 return NULL;
6952}
6953
6954
6955
6956
6957__be32
6958nfs4_check_open_reclaim(clientid_t *clid,
6959 struct nfsd4_compound_state *cstate,
6960 struct nfsd_net *nn)
6961{
6962 __be32 status;
6963
6964
6965 status = lookup_clientid(clid, cstate, nn);
6966 if (status)
6967 return nfserr_reclaim_bad;
6968
6969 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
6970 return nfserr_no_grace;
6971
6972 if (nfsd4_client_record_check(cstate->clp))
6973 return nfserr_reclaim_bad;
6974
6975 return nfs_ok;
6976}
6977
6978#ifdef CONFIG_NFSD_FAULT_INJECTION
6979static inline void
6980put_client(struct nfs4_client *clp)
6981{
6982 atomic_dec(&clp->cl_rpc_users);
6983}
6984
6985static struct nfs4_client *
6986nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
6987{
6988 struct nfs4_client *clp;
6989 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6990 nfsd_net_id);
6991
6992 if (!nfsd_netns_ready(nn))
6993 return NULL;
6994
6995 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6996 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
6997 return clp;
6998 }
6999 return NULL;
7000}
7001
7002u64
7003nfsd_inject_print_clients(void)
7004{
7005 struct nfs4_client *clp;
7006 u64 count = 0;
7007 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7008 nfsd_net_id);
7009 char buf[INET6_ADDRSTRLEN];
7010
7011 if (!nfsd_netns_ready(nn))
7012 return 0;
7013
7014 spin_lock(&nn->client_lock);
7015 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
7016 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
7017 pr_info("NFS Client: %s\n", buf);
7018 ++count;
7019 }
7020 spin_unlock(&nn->client_lock);
7021
7022 return count;
7023}
7024
7025u64
7026nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size)
7027{
7028 u64 count = 0;
7029 struct nfs4_client *clp;
7030 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7031 nfsd_net_id);
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 if (mark_client_expired_locked(clp) == nfs_ok)
7040 ++count;
7041 else
7042 clp = NULL;
7043 }
7044 spin_unlock(&nn->client_lock);
7045
7046 if (clp)
7047 expire_client(clp);
7048
7049 return count;
7050}
7051
7052u64
7053nfsd_inject_forget_clients(u64 max)
7054{
7055 u64 count = 0;
7056 struct nfs4_client *clp, *next;
7057 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7058 nfsd_net_id);
7059 LIST_HEAD(reaplist);
7060
7061 if (!nfsd_netns_ready(nn))
7062 return count;
7063
7064 spin_lock(&nn->client_lock);
7065 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
7066 if (mark_client_expired_locked(clp) == nfs_ok) {
7067 list_add(&clp->cl_lru, &reaplist);
7068 if (max != 0 && ++count >= max)
7069 break;
7070 }
7071 }
7072 spin_unlock(&nn->client_lock);
7073
7074 list_for_each_entry_safe(clp, next, &reaplist, cl_lru)
7075 expire_client(clp);
7076
7077 return count;
7078}
7079
7080static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
7081 const char *type)
7082{
7083 char buf[INET6_ADDRSTRLEN];
7084 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
7085 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
7086}
7087
7088static void
7089nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
7090 struct list_head *collect)
7091{
7092 struct nfs4_client *clp = lst->st_stid.sc_client;
7093 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7094 nfsd_net_id);
7095
7096 if (!collect)
7097 return;
7098
7099 lockdep_assert_held(&nn->client_lock);
7100 atomic_inc(&clp->cl_rpc_users);
7101 list_add(&lst->st_locks, collect);
7102}
7103
7104static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
7105 struct list_head *collect,
7106 bool (*func)(struct nfs4_ol_stateid *))
7107{
7108 struct nfs4_openowner *oop;
7109 struct nfs4_ol_stateid *stp, *st_next;
7110 struct nfs4_ol_stateid *lst, *lst_next;
7111 u64 count = 0;
7112
7113 spin_lock(&clp->cl_lock);
7114 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
7115 list_for_each_entry_safe(stp, st_next,
7116 &oop->oo_owner.so_stateids, st_perstateowner) {
7117 list_for_each_entry_safe(lst, lst_next,
7118 &stp->st_locks, st_locks) {
7119 if (func) {
7120 if (func(lst))
7121 nfsd_inject_add_lock_to_list(lst,
7122 collect);
7123 }
7124 ++count;
7125
7126
7127
7128
7129
7130
7131
7132 WARN_ON_ONCE(count == (INT_MAX / 2));
7133 if (count == max)
7134 goto out;
7135 }
7136 }
7137 }
7138out:
7139 spin_unlock(&clp->cl_lock);
7140
7141 return count;
7142}
7143
7144static u64
7145nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect,
7146 u64 max)
7147{
7148 return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid);
7149}
7150
7151static u64
7152nfsd_print_client_locks(struct nfs4_client *clp)
7153{
7154 u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL);
7155 nfsd_print_count(clp, count, "locked files");
7156 return count;
7157}
7158
7159u64
7160nfsd_inject_print_locks(void)
7161{
7162 struct nfs4_client *clp;
7163 u64 count = 0;
7164 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7165 nfsd_net_id);
7166
7167 if (!nfsd_netns_ready(nn))
7168 return 0;
7169
7170 spin_lock(&nn->client_lock);
7171 list_for_each_entry(clp, &nn->client_lru, cl_lru)
7172 count += nfsd_print_client_locks(clp);
7173 spin_unlock(&nn->client_lock);
7174
7175 return count;
7176}
7177
7178static void
7179nfsd_reap_locks(struct list_head *reaplist)
7180{
7181 struct nfs4_client *clp;
7182 struct nfs4_ol_stateid *stp, *next;
7183
7184 list_for_each_entry_safe(stp, next, reaplist, st_locks) {
7185 list_del_init(&stp->st_locks);
7186 clp = stp->st_stid.sc_client;
7187 nfs4_put_stid(&stp->st_stid);
7188 put_client(clp);
7189 }
7190}
7191
7192u64
7193nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size)
7194{
7195 unsigned int count = 0;
7196 struct nfs4_client *clp;
7197 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7198 nfsd_net_id);
7199 LIST_HEAD(reaplist);
7200
7201 if (!nfsd_netns_ready(nn))
7202 return count;
7203
7204 spin_lock(&nn->client_lock);
7205 clp = nfsd_find_client(addr, addr_size);
7206 if (clp)
7207 count = nfsd_collect_client_locks(clp, &reaplist, 0);
7208 spin_unlock(&nn->client_lock);
7209 nfsd_reap_locks(&reaplist);
7210 return count;
7211}
7212
7213u64
7214nfsd_inject_forget_locks(u64 max)
7215{
7216 u64 count = 0;
7217 struct nfs4_client *clp;
7218 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7219 nfsd_net_id);
7220 LIST_HEAD(reaplist);
7221
7222 if (!nfsd_netns_ready(nn))
7223 return count;
7224
7225 spin_lock(&nn->client_lock);
7226 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
7227 count += nfsd_collect_client_locks(clp, &reaplist, max - count);
7228 if (max != 0 && count >= max)
7229 break;
7230 }
7231 spin_unlock(&nn->client_lock);
7232 nfsd_reap_locks(&reaplist);
7233 return count;
7234}
7235
7236static u64
7237nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
7238 struct list_head *collect,
7239 void (*func)(struct nfs4_openowner *))
7240{
7241 struct nfs4_openowner *oop, *next;
7242 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7243 nfsd_net_id);
7244 u64 count = 0;
7245
7246 lockdep_assert_held(&nn->client_lock);
7247
7248 spin_lock(&clp->cl_lock);
7249 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
7250 if (func) {
7251 func(oop);
7252 if (collect) {
7253 atomic_inc(&clp->cl_rpc_users);
7254 list_add(&oop->oo_perclient, collect);
7255 }
7256 }
7257 ++count;
7258
7259
7260
7261
7262
7263
7264 WARN_ON_ONCE(count == (INT_MAX / 2));
7265 if (count == max)
7266 break;
7267 }
7268 spin_unlock(&clp->cl_lock);
7269
7270 return count;
7271}
7272
7273static u64
7274nfsd_print_client_openowners(struct nfs4_client *clp)
7275{
7276 u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL);
7277
7278 nfsd_print_count(clp, count, "openowners");
7279 return count;
7280}
7281
7282static u64
7283nfsd_collect_client_openowners(struct nfs4_client *clp,
7284 struct list_head *collect, u64 max)
7285{
7286 return nfsd_foreach_client_openowner(clp, max, collect,
7287 unhash_openowner_locked);
7288}
7289
7290u64
7291nfsd_inject_print_openowners(void)
7292{
7293 struct nfs4_client *clp;
7294 u64 count = 0;
7295 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7296 nfsd_net_id);
7297
7298 if (!nfsd_netns_ready(nn))
7299 return 0;
7300
7301 spin_lock(&nn->client_lock);
7302 list_for_each_entry(clp, &nn->client_lru, cl_lru)
7303 count += nfsd_print_client_openowners(clp);
7304 spin_unlock(&nn->client_lock);
7305
7306 return count;
7307}
7308
7309static void
7310nfsd_reap_openowners(struct list_head *reaplist)
7311{
7312 struct nfs4_client *clp;
7313 struct nfs4_openowner *oop, *next;
7314
7315 list_for_each_entry_safe(oop, next, reaplist, oo_perclient) {
7316 list_del_init(&oop->oo_perclient);
7317 clp = oop->oo_owner.so_client;
7318 release_openowner(oop);
7319 put_client(clp);
7320 }
7321}
7322
7323u64
7324nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr,
7325 size_t addr_size)
7326{
7327 unsigned int count = 0;
7328 struct nfs4_client *clp;
7329 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7330 nfsd_net_id);
7331 LIST_HEAD(reaplist);
7332
7333 if (!nfsd_netns_ready(nn))
7334 return count;
7335
7336 spin_lock(&nn->client_lock);
7337 clp = nfsd_find_client(addr, addr_size);
7338 if (clp)
7339 count = nfsd_collect_client_openowners(clp, &reaplist, 0);
7340 spin_unlock(&nn->client_lock);
7341 nfsd_reap_openowners(&reaplist);
7342 return count;
7343}
7344
7345u64
7346nfsd_inject_forget_openowners(u64 max)
7347{
7348 u64 count = 0;
7349 struct nfs4_client *clp;
7350 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7351 nfsd_net_id);
7352 LIST_HEAD(reaplist);
7353
7354 if (!nfsd_netns_ready(nn))
7355 return count;
7356
7357 spin_lock(&nn->client_lock);
7358 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
7359 count += nfsd_collect_client_openowners(clp, &reaplist,
7360 max - count);
7361 if (max != 0 && count >= max)
7362 break;
7363 }
7364 spin_unlock(&nn->client_lock);
7365 nfsd_reap_openowners(&reaplist);
7366 return count;
7367}
7368
7369static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
7370 struct list_head *victims)
7371{
7372 struct nfs4_delegation *dp, *next;
7373 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7374 nfsd_net_id);
7375 u64 count = 0;
7376
7377 lockdep_assert_held(&nn->client_lock);
7378
7379 spin_lock(&state_lock);
7380 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
7381 if (victims) {
7382
7383
7384
7385
7386
7387
7388 if (dp->dl_time != 0)
7389 continue;
7390
7391 atomic_inc(&clp->cl_rpc_users);
7392 WARN_ON(!unhash_delegation_locked(dp));
7393 list_add(&dp->dl_recall_lru, victims);
7394 }
7395 ++count;
7396
7397
7398
7399
7400
7401
7402 WARN_ON_ONCE(count == (INT_MAX / 2));
7403 if (count == max)
7404 break;
7405 }
7406 spin_unlock(&state_lock);
7407 return count;
7408}
7409
7410static u64
7411nfsd_print_client_delegations(struct nfs4_client *clp)
7412{
7413 u64 count = nfsd_find_all_delegations(clp, 0, NULL);
7414
7415 nfsd_print_count(clp, count, "delegations");
7416 return count;
7417}
7418
7419u64
7420nfsd_inject_print_delegations(void)
7421{
7422 struct nfs4_client *clp;
7423 u64 count = 0;
7424 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7425 nfsd_net_id);
7426
7427 if (!nfsd_netns_ready(nn))
7428 return 0;
7429
7430 spin_lock(&nn->client_lock);
7431 list_for_each_entry(clp, &nn->client_lru, cl_lru)
7432 count += nfsd_print_client_delegations(clp);
7433 spin_unlock(&nn->client_lock);
7434
7435 return count;
7436}
7437
7438static void
7439nfsd_forget_delegations(struct list_head *reaplist)
7440{
7441 struct nfs4_client *clp;
7442 struct nfs4_delegation *dp, *next;
7443
7444 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
7445 list_del_init(&dp->dl_recall_lru);
7446 clp = dp->dl_stid.sc_client;
7447 revoke_delegation(dp);
7448 put_client(clp);
7449 }
7450}
7451
7452u64
7453nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr,
7454 size_t addr_size)
7455{
7456 u64 count = 0;
7457 struct nfs4_client *clp;
7458 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7459 nfsd_net_id);
7460 LIST_HEAD(reaplist);
7461
7462 if (!nfsd_netns_ready(nn))
7463 return count;
7464
7465 spin_lock(&nn->client_lock);
7466 clp = nfsd_find_client(addr, addr_size);
7467 if (clp)
7468 count = nfsd_find_all_delegations(clp, 0, &reaplist);
7469 spin_unlock(&nn->client_lock);
7470
7471 nfsd_forget_delegations(&reaplist);
7472 return count;
7473}
7474
7475u64
7476nfsd_inject_forget_delegations(u64 max)
7477{
7478 u64 count = 0;
7479 struct nfs4_client *clp;
7480 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7481 nfsd_net_id);
7482 LIST_HEAD(reaplist);
7483
7484 if (!nfsd_netns_ready(nn))
7485 return count;
7486
7487 spin_lock(&nn->client_lock);
7488 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
7489 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
7490 if (max != 0 && count >= max)
7491 break;
7492 }
7493 spin_unlock(&nn->client_lock);
7494 nfsd_forget_delegations(&reaplist);
7495 return count;
7496}
7497
7498static void
7499nfsd_recall_delegations(struct list_head *reaplist)
7500{
7501 struct nfs4_client *clp;
7502 struct nfs4_delegation *dp, *next;
7503
7504 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
7505 list_del_init(&dp->dl_recall_lru);
7506 clp = dp->dl_stid.sc_client;
7507
7508
7509
7510
7511
7512
7513 spin_lock(&state_lock);
7514 dp->dl_time = 0;
7515 spin_unlock(&state_lock);
7516 nfsd_break_one_deleg(dp);
7517 put_client(clp);
7518 }
7519}
7520
7521u64
7522nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr,
7523 size_t addr_size)
7524{
7525 u64 count = 0;
7526 struct nfs4_client *clp;
7527 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7528 nfsd_net_id);
7529 LIST_HEAD(reaplist);
7530
7531 if (!nfsd_netns_ready(nn))
7532 return count;
7533
7534 spin_lock(&nn->client_lock);
7535 clp = nfsd_find_client(addr, addr_size);
7536 if (clp)
7537 count = nfsd_find_all_delegations(clp, 0, &reaplist);
7538 spin_unlock(&nn->client_lock);
7539
7540 nfsd_recall_delegations(&reaplist);
7541 return count;
7542}
7543
7544u64
7545nfsd_inject_recall_delegations(u64 max)
7546{
7547 u64 count = 0;
7548 struct nfs4_client *clp, *next;
7549 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
7550 nfsd_net_id);
7551 LIST_HEAD(reaplist);
7552
7553 if (!nfsd_netns_ready(nn))
7554 return count;
7555
7556 spin_lock(&nn->client_lock);
7557 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
7558 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
7559 if (max != 0 && ++count >= max)
7560 break;
7561 }
7562 spin_unlock(&nn->client_lock);
7563 nfsd_recall_delegations(&reaplist);
7564 return count;
7565}
7566#endif
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577static void
7578set_max_delegations(void)
7579{
7580
7581
7582
7583
7584
7585
7586 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
7587}
7588
7589static int nfs4_state_create_net(struct net *net)
7590{
7591 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7592 int i;
7593
7594 nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
7595 sizeof(struct list_head),
7596 GFP_KERNEL);
7597 if (!nn->conf_id_hashtbl)
7598 goto err;
7599 nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
7600 sizeof(struct list_head),
7601 GFP_KERNEL);
7602 if (!nn->unconf_id_hashtbl)
7603 goto err_unconf_id;
7604 nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE,
7605 sizeof(struct list_head),
7606 GFP_KERNEL);
7607 if (!nn->sessionid_hashtbl)
7608 goto err_sessionid;
7609
7610 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7611 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
7612 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
7613 }
7614 for (i = 0; i < SESSION_HASH_SIZE; i++)
7615 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
7616 nn->conf_name_tree = RB_ROOT;
7617 nn->unconf_name_tree = RB_ROOT;
7618 nn->boot_time = get_seconds();
7619 nn->grace_ended = false;
7620 nn->nfsd4_manager.block_opens = true;
7621 INIT_LIST_HEAD(&nn->nfsd4_manager.list);
7622 INIT_LIST_HEAD(&nn->client_lru);
7623 INIT_LIST_HEAD(&nn->close_lru);
7624 INIT_LIST_HEAD(&nn->del_recall_lru);
7625 spin_lock_init(&nn->client_lock);
7626 spin_lock_init(&nn->s2s_cp_lock);
7627 idr_init(&nn->s2s_cp_stateids);
7628
7629 spin_lock_init(&nn->blocked_locks_lock);
7630 INIT_LIST_HEAD(&nn->blocked_locks_lru);
7631
7632 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
7633 get_net(net);
7634
7635 return 0;
7636
7637err_sessionid:
7638 kfree(nn->unconf_id_hashtbl);
7639err_unconf_id:
7640 kfree(nn->conf_id_hashtbl);
7641err:
7642 return -ENOMEM;
7643}
7644
7645static void
7646nfs4_state_destroy_net(struct net *net)
7647{
7648 int i;
7649 struct nfs4_client *clp = NULL;
7650 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7651
7652 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7653 while (!list_empty(&nn->conf_id_hashtbl[i])) {
7654 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7655 destroy_client(clp);
7656 }
7657 }
7658
7659 WARN_ON(!list_empty(&nn->blocked_locks_lru));
7660
7661 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7662 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
7663 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7664 destroy_client(clp);
7665 }
7666 }
7667
7668 kfree(nn->sessionid_hashtbl);
7669 kfree(nn->unconf_id_hashtbl);
7670 kfree(nn->conf_id_hashtbl);
7671 put_net(net);
7672}
7673
7674int
7675nfs4_state_start_net(struct net *net)
7676{
7677 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7678 int ret;
7679
7680 ret = nfs4_state_create_net(net);
7681 if (ret)
7682 return ret;
7683 locks_start_grace(net, &nn->nfsd4_manager);
7684 nfsd4_client_tracking_init(net);
7685 if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
7686 goto skip_grace;
7687 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
7688 nn->nfsd4_grace, net->ns.inum);
7689 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
7690 return 0;
7691
7692skip_grace:
7693 printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n",
7694 net->ns.inum);
7695 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);
7696 nfsd4_end_grace(nn);
7697 return 0;
7698}
7699
7700
7701
7702int
7703nfs4_state_start(void)
7704{
7705 int ret;
7706
7707 laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
7708 if (laundry_wq == NULL) {
7709 ret = -ENOMEM;
7710 goto out;
7711 }
7712 ret = nfsd4_create_callback_queue();
7713 if (ret)
7714 goto out_free_laundry;
7715
7716 set_max_delegations();
7717 return 0;
7718
7719out_free_laundry:
7720 destroy_workqueue(laundry_wq);
7721out:
7722 return ret;
7723}
7724
7725void
7726nfs4_state_shutdown_net(struct net *net)
7727{
7728 struct nfs4_delegation *dp = NULL;
7729 struct list_head *pos, *next, reaplist;
7730 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7731
7732 cancel_delayed_work_sync(&nn->laundromat_work);
7733 locks_end_grace(&nn->nfsd4_manager);
7734
7735 INIT_LIST_HEAD(&reaplist);
7736 spin_lock(&state_lock);
7737 list_for_each_safe(pos, next, &nn->del_recall_lru) {
7738 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7739 WARN_ON(!unhash_delegation_locked(dp));
7740 list_add(&dp->dl_recall_lru, &reaplist);
7741 }
7742 spin_unlock(&state_lock);
7743 list_for_each_safe(pos, next, &reaplist) {
7744 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7745 list_del_init(&dp->dl_recall_lru);
7746 destroy_unhashed_deleg(dp);
7747 }
7748
7749 nfsd4_client_tracking_exit(net);
7750 nfs4_state_destroy_net(net);
7751}
7752
7753void
7754nfs4_state_shutdown(void)
7755{
7756 destroy_workqueue(laundry_wq);
7757 nfsd4_destroy_callback_queue();
7758}
7759
7760static void
7761get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7762{
7763 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
7764 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
7765}
7766
7767static void
7768put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7769{
7770 if (cstate->minorversion) {
7771 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
7772 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7773 }
7774}
7775
7776void
7777clear_current_stateid(struct nfsd4_compound_state *cstate)
7778{
7779 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7780}
7781
7782
7783
7784
7785void
7786nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate,
7787 union nfsd4_op_u *u)
7788{
7789 put_stateid(cstate, &u->open_downgrade.od_stateid);
7790}
7791
7792void
7793nfsd4_set_openstateid(struct nfsd4_compound_state *cstate,
7794 union nfsd4_op_u *u)
7795{
7796 put_stateid(cstate, &u->open.op_stateid);
7797}
7798
7799void
7800nfsd4_set_closestateid(struct nfsd4_compound_state *cstate,
7801 union nfsd4_op_u *u)
7802{
7803 put_stateid(cstate, &u->close.cl_stateid);
7804}
7805
7806void
7807nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate,
7808 union nfsd4_op_u *u)
7809{
7810 put_stateid(cstate, &u->lock.lk_resp_stateid);
7811}
7812
7813
7814
7815
7816
7817void
7818nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate,
7819 union nfsd4_op_u *u)
7820{
7821 get_stateid(cstate, &u->open_downgrade.od_stateid);
7822}
7823
7824void
7825nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate,
7826 union nfsd4_op_u *u)
7827{
7828 get_stateid(cstate, &u->delegreturn.dr_stateid);
7829}
7830
7831void
7832nfsd4_get_freestateid(struct nfsd4_compound_state *cstate,
7833 union nfsd4_op_u *u)
7834{
7835 get_stateid(cstate, &u->free_stateid.fr_stateid);
7836}
7837
7838void
7839nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate,
7840 union nfsd4_op_u *u)
7841{
7842 get_stateid(cstate, &u->setattr.sa_stateid);
7843}
7844
7845void
7846nfsd4_get_closestateid(struct nfsd4_compound_state *cstate,
7847 union nfsd4_op_u *u)
7848{
7849 get_stateid(cstate, &u->close.cl_stateid);
7850}
7851
7852void
7853nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate,
7854 union nfsd4_op_u *u)
7855{
7856 get_stateid(cstate, &u->locku.lu_stateid);
7857}
7858
7859void
7860nfsd4_get_readstateid(struct nfsd4_compound_state *cstate,
7861 union nfsd4_op_u *u)
7862{
7863 get_stateid(cstate, &u->read.rd_stateid);
7864}
7865
7866void
7867nfsd4_get_writestateid(struct nfsd4_compound_state *cstate,
7868 union nfsd4_op_u *u)
7869{
7870 get_stateid(cstate, &u->write.wr_stateid);
7871}
7872