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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 <linux/fsnotify.h>
47#include <linux/nfs_ssc.h>
48#include "xdr4.h"
49#include "xdr4cb.h"
50#include "vfs.h"
51#include "current_stateid.h"
52
53#include "netns.h"
54#include "pnfs.h"
55#include "filecache.h"
56#include "trace.h"
57
58#define NFSDDBG_FACILITY NFSDDBG_PROC
59
60#define all_ones {{~0,~0},~0}
61static const stateid_t one_stateid = {
62 .si_generation = ~0,
63 .si_opaque = all_ones,
64};
65static const stateid_t zero_stateid = {
66
67};
68static const stateid_t currentstateid = {
69 .si_generation = 1,
70};
71static const stateid_t close_stateid = {
72 .si_generation = 0xffffffffU,
73};
74
75static u64 current_sessionid = 1;
76
77#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
78#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
79#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
80#define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
81
82
83static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
84static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
85void nfsd4_end_grace(struct nfsd_net *nn);
86static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps);
87
88
89
90
91
92
93
94
95static DEFINE_SPINLOCK(state_lock);
96
97enum nfsd4_st_mutex_lock_subclass {
98 OPEN_STATEID_MUTEX = 0,
99 LOCK_STATEID_MUTEX = 1,
100};
101
102
103
104
105
106static DECLARE_WAIT_QUEUE_HEAD(close_wq);
107
108
109
110
111
112
113static DECLARE_WAIT_QUEUE_HEAD(expiry_wq);
114
115static struct kmem_cache *client_slab;
116static struct kmem_cache *openowner_slab;
117static struct kmem_cache *lockowner_slab;
118static struct kmem_cache *file_slab;
119static struct kmem_cache *stateid_slab;
120static struct kmem_cache *deleg_slab;
121static struct kmem_cache *odstate_slab;
122
123static void free_session(struct nfsd4_session *);
124
125static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
126static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
127
128static bool is_session_dead(struct nfsd4_session *ses)
129{
130 return ses->se_flags & NFS4_SESSION_DEAD;
131}
132
133static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
134{
135 if (atomic_read(&ses->se_ref) > ref_held_by_me)
136 return nfserr_jukebox;
137 ses->se_flags |= NFS4_SESSION_DEAD;
138 return nfs_ok;
139}
140
141static bool is_client_expired(struct nfs4_client *clp)
142{
143 return clp->cl_time == 0;
144}
145
146static __be32 get_client_locked(struct nfs4_client *clp)
147{
148 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
149
150 lockdep_assert_held(&nn->client_lock);
151
152 if (is_client_expired(clp))
153 return nfserr_expired;
154 atomic_inc(&clp->cl_rpc_users);
155 return nfs_ok;
156}
157
158
159static inline void
160renew_client_locked(struct nfs4_client *clp)
161{
162 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
163
164 if (is_client_expired(clp)) {
165 WARN_ON(1);
166 printk("%s: client (clientid %08x/%08x) already expired\n",
167 __func__,
168 clp->cl_clientid.cl_boot,
169 clp->cl_clientid.cl_id);
170 return;
171 }
172
173 list_move_tail(&clp->cl_lru, &nn->client_lru);
174 clp->cl_time = ktime_get_boottime_seconds();
175}
176
177static void put_client_renew_locked(struct nfs4_client *clp)
178{
179 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
180
181 lockdep_assert_held(&nn->client_lock);
182
183 if (!atomic_dec_and_test(&clp->cl_rpc_users))
184 return;
185 if (!is_client_expired(clp))
186 renew_client_locked(clp);
187 else
188 wake_up_all(&expiry_wq);
189}
190
191static void put_client_renew(struct nfs4_client *clp)
192{
193 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
194
195 if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))
196 return;
197 if (!is_client_expired(clp))
198 renew_client_locked(clp);
199 else
200 wake_up_all(&expiry_wq);
201 spin_unlock(&nn->client_lock);
202}
203
204static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
205{
206 __be32 status;
207
208 if (is_session_dead(ses))
209 return nfserr_badsession;
210 status = get_client_locked(ses->se_client);
211 if (status)
212 return status;
213 atomic_inc(&ses->se_ref);
214 return nfs_ok;
215}
216
217static void nfsd4_put_session_locked(struct nfsd4_session *ses)
218{
219 struct nfs4_client *clp = ses->se_client;
220 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
221
222 lockdep_assert_held(&nn->client_lock);
223
224 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
225 free_session(ses);
226 put_client_renew_locked(clp);
227}
228
229static void nfsd4_put_session(struct nfsd4_session *ses)
230{
231 struct nfs4_client *clp = ses->se_client;
232 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
233
234 spin_lock(&nn->client_lock);
235 nfsd4_put_session_locked(ses);
236 spin_unlock(&nn->client_lock);
237}
238
239static struct nfsd4_blocked_lock *
240find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
241 struct nfsd_net *nn)
242{
243 struct nfsd4_blocked_lock *cur, *found = NULL;
244
245 spin_lock(&nn->blocked_locks_lock);
246 list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
247 if (fh_match(fh, &cur->nbl_fh)) {
248 list_del_init(&cur->nbl_list);
249 list_del_init(&cur->nbl_lru);
250 found = cur;
251 break;
252 }
253 }
254 spin_unlock(&nn->blocked_locks_lock);
255 if (found)
256 locks_delete_block(&found->nbl_lock);
257 return found;
258}
259
260static struct nfsd4_blocked_lock *
261find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
262 struct nfsd_net *nn)
263{
264 struct nfsd4_blocked_lock *nbl;
265
266 nbl = find_blocked_lock(lo, fh, nn);
267 if (!nbl) {
268 nbl= kmalloc(sizeof(*nbl), GFP_KERNEL);
269 if (nbl) {
270 INIT_LIST_HEAD(&nbl->nbl_list);
271 INIT_LIST_HEAD(&nbl->nbl_lru);
272 fh_copy_shallow(&nbl->nbl_fh, fh);
273 locks_init_lock(&nbl->nbl_lock);
274 nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,
275 &nfsd4_cb_notify_lock_ops,
276 NFSPROC4_CLNT_CB_NOTIFY_LOCK);
277 }
278 }
279 return nbl;
280}
281
282static void
283free_blocked_lock(struct nfsd4_blocked_lock *nbl)
284{
285 locks_delete_block(&nbl->nbl_lock);
286 locks_release_private(&nbl->nbl_lock);
287 kfree(nbl);
288}
289
290static void
291remove_blocked_locks(struct nfs4_lockowner *lo)
292{
293 struct nfs4_client *clp = lo->lo_owner.so_client;
294 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
295 struct nfsd4_blocked_lock *nbl;
296 LIST_HEAD(reaplist);
297
298
299 spin_lock(&nn->blocked_locks_lock);
300 while (!list_empty(&lo->lo_blocked)) {
301 nbl = list_first_entry(&lo->lo_blocked,
302 struct nfsd4_blocked_lock,
303 nbl_list);
304 list_del_init(&nbl->nbl_list);
305 list_move(&nbl->nbl_lru, &reaplist);
306 }
307 spin_unlock(&nn->blocked_locks_lock);
308
309
310 while (!list_empty(&reaplist)) {
311 nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock,
312 nbl_lru);
313 list_del_init(&nbl->nbl_lru);
314 free_blocked_lock(nbl);
315 }
316}
317
318static void
319nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
320{
321 struct nfsd4_blocked_lock *nbl = container_of(cb,
322 struct nfsd4_blocked_lock, nbl_cb);
323 locks_delete_block(&nbl->nbl_lock);
324}
325
326static int
327nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
328{
329
330
331
332
333
334 switch (task->tk_status) {
335 case -NFS4ERR_DELAY:
336 rpc_delay(task, 1 * HZ);
337 return 0;
338 default:
339 return 1;
340 }
341}
342
343static void
344nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb)
345{
346 struct nfsd4_blocked_lock *nbl = container_of(cb,
347 struct nfsd4_blocked_lock, nbl_cb);
348
349 free_blocked_lock(nbl);
350}
351
352static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
353 .prepare = nfsd4_cb_notify_lock_prepare,
354 .done = nfsd4_cb_notify_lock_done,
355 .release = nfsd4_cb_notify_lock_release,
356};
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374
375
376static unsigned int
377bmap_to_share_mode(unsigned long bmap)
378{
379 int i;
380 unsigned int access = 0;
381
382 for (i = 1; i < 4; i++) {
383 if (test_bit(i, &bmap))
384 access |= i;
385 }
386 return access;
387}
388
389
390static inline void
391set_access(u32 access, struct nfs4_ol_stateid *stp)
392{
393 unsigned char mask = 1 << access;
394
395 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
396 stp->st_access_bmap |= mask;
397}
398
399
400static inline void
401clear_access(u32 access, struct nfs4_ol_stateid *stp)
402{
403 unsigned char mask = 1 << access;
404
405 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
406 stp->st_access_bmap &= ~mask;
407}
408
409
410static inline bool
411test_access(u32 access, struct nfs4_ol_stateid *stp)
412{
413 unsigned char mask = 1 << access;
414
415 return (bool)(stp->st_access_bmap & mask);
416}
417
418
419static inline void
420set_deny(u32 deny, struct nfs4_ol_stateid *stp)
421{
422 unsigned char mask = 1 << deny;
423
424 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
425 stp->st_deny_bmap |= mask;
426}
427
428
429static inline void
430clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
431{
432 unsigned char mask = 1 << deny;
433
434 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
435 stp->st_deny_bmap &= ~mask;
436}
437
438
439static inline bool
440test_deny(u32 deny, struct nfs4_ol_stateid *stp)
441{
442 unsigned char mask = 1 << deny;
443
444 return (bool)(stp->st_deny_bmap & mask);
445}
446
447static int nfs4_access_to_omode(u32 access)
448{
449 switch (access & NFS4_SHARE_ACCESS_BOTH) {
450 case NFS4_SHARE_ACCESS_READ:
451 return O_RDONLY;
452 case NFS4_SHARE_ACCESS_WRITE:
453 return O_WRONLY;
454 case NFS4_SHARE_ACCESS_BOTH:
455 return O_RDWR;
456 }
457 WARN_ON_ONCE(1);
458 return O_RDONLY;
459}
460
461static inline int
462access_permit_read(struct nfs4_ol_stateid *stp)
463{
464 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
465 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
466 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
467}
468
469static inline int
470access_permit_write(struct nfs4_ol_stateid *stp)
471{
472 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
473 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
474}
475
476static inline struct nfs4_stateowner *
477nfs4_get_stateowner(struct nfs4_stateowner *sop)
478{
479 atomic_inc(&sop->so_count);
480 return sop;
481}
482
483static int
484same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
485{
486 return (sop->so_owner.len == owner->len) &&
487 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
488}
489
490static struct nfs4_openowner *
491find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
492 struct nfs4_client *clp)
493{
494 struct nfs4_stateowner *so;
495
496 lockdep_assert_held(&clp->cl_lock);
497
498 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
499 so_strhash) {
500 if (!so->so_is_open_owner)
501 continue;
502 if (same_owner_str(so, &open->op_owner))
503 return openowner(nfs4_get_stateowner(so));
504 }
505 return NULL;
506}
507
508static struct nfs4_openowner *
509find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
510 struct nfs4_client *clp)
511{
512 struct nfs4_openowner *oo;
513
514 spin_lock(&clp->cl_lock);
515 oo = find_openstateowner_str_locked(hashval, open, clp);
516 spin_unlock(&clp->cl_lock);
517 return oo;
518}
519
520static inline u32
521opaque_hashval(const void *ptr, int nbytes)
522{
523 unsigned char *cptr = (unsigned char *) ptr;
524
525 u32 x = 0;
526 while (nbytes--) {
527 x *= 37;
528 x += *cptr++;
529 }
530 return x;
531}
532
533static void nfsd4_free_file_rcu(struct rcu_head *rcu)
534{
535 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
536
537 kmem_cache_free(file_slab, fp);
538}
539
540void
541put_nfs4_file(struct nfs4_file *fi)
542{
543 might_lock(&state_lock);
544
545 if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {
546 hlist_del_rcu(&fi->fi_hash);
547 spin_unlock(&state_lock);
548 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
549 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
550 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
551 }
552}
553
554static struct nfsd_file *
555__nfs4_get_fd(struct nfs4_file *f, int oflag)
556{
557 if (f->fi_fds[oflag])
558 return nfsd_file_get(f->fi_fds[oflag]);
559 return NULL;
560}
561
562static struct nfsd_file *
563find_writeable_file_locked(struct nfs4_file *f)
564{
565 struct nfsd_file *ret;
566
567 lockdep_assert_held(&f->fi_lock);
568
569 ret = __nfs4_get_fd(f, O_WRONLY);
570 if (!ret)
571 ret = __nfs4_get_fd(f, O_RDWR);
572 return ret;
573}
574
575static struct nfsd_file *
576find_writeable_file(struct nfs4_file *f)
577{
578 struct nfsd_file *ret;
579
580 spin_lock(&f->fi_lock);
581 ret = find_writeable_file_locked(f);
582 spin_unlock(&f->fi_lock);
583
584 return ret;
585}
586
587static struct nfsd_file *
588find_readable_file_locked(struct nfs4_file *f)
589{
590 struct nfsd_file *ret;
591
592 lockdep_assert_held(&f->fi_lock);
593
594 ret = __nfs4_get_fd(f, O_RDONLY);
595 if (!ret)
596 ret = __nfs4_get_fd(f, O_RDWR);
597 return ret;
598}
599
600static struct nfsd_file *
601find_readable_file(struct nfs4_file *f)
602{
603 struct nfsd_file *ret;
604
605 spin_lock(&f->fi_lock);
606 ret = find_readable_file_locked(f);
607 spin_unlock(&f->fi_lock);
608
609 return ret;
610}
611
612struct nfsd_file *
613find_any_file(struct nfs4_file *f)
614{
615 struct nfsd_file *ret;
616
617 if (!f)
618 return NULL;
619 spin_lock(&f->fi_lock);
620 ret = __nfs4_get_fd(f, O_RDWR);
621 if (!ret) {
622 ret = __nfs4_get_fd(f, O_WRONLY);
623 if (!ret)
624 ret = __nfs4_get_fd(f, O_RDONLY);
625 }
626 spin_unlock(&f->fi_lock);
627 return ret;
628}
629
630static struct nfsd_file *find_deleg_file(struct nfs4_file *f)
631{
632 struct nfsd_file *ret = NULL;
633
634 spin_lock(&f->fi_lock);
635 if (f->fi_deleg_file)
636 ret = nfsd_file_get(f->fi_deleg_file);
637 spin_unlock(&f->fi_lock);
638 return ret;
639}
640
641static atomic_long_t num_delegations;
642unsigned long max_delegations;
643
644
645
646
647
648
649#define OWNER_HASH_BITS 8
650#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
651#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
652
653static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
654{
655 unsigned int ret;
656
657 ret = opaque_hashval(ownername->data, ownername->len);
658 return ret & OWNER_HASH_MASK;
659}
660
661
662#define FILE_HASH_BITS 8
663#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
664
665static unsigned int file_hashval(struct svc_fh *fh)
666{
667 struct inode *inode = d_inode(fh->fh_dentry);
668
669
670 return (unsigned int)hash_long(inode->i_ino, FILE_HASH_BITS);
671}
672
673static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
674
675static void
676__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
677{
678 lockdep_assert_held(&fp->fi_lock);
679
680 if (access & NFS4_SHARE_ACCESS_WRITE)
681 atomic_inc(&fp->fi_access[O_WRONLY]);
682 if (access & NFS4_SHARE_ACCESS_READ)
683 atomic_inc(&fp->fi_access[O_RDONLY]);
684}
685
686static __be32
687nfs4_file_get_access(struct nfs4_file *fp, u32 access)
688{
689 lockdep_assert_held(&fp->fi_lock);
690
691
692 if (access & ~NFS4_SHARE_ACCESS_BOTH)
693 return nfserr_inval;
694
695
696 if ((access & fp->fi_share_deny) != 0)
697 return nfserr_share_denied;
698
699 __nfs4_file_get_access(fp, access);
700 return nfs_ok;
701}
702
703static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
704{
705
706 if (deny) {
707
708 if (deny & ~NFS4_SHARE_DENY_BOTH)
709 return nfserr_inval;
710
711 if ((deny & NFS4_SHARE_DENY_READ) &&
712 atomic_read(&fp->fi_access[O_RDONLY]))
713 return nfserr_share_denied;
714
715 if ((deny & NFS4_SHARE_DENY_WRITE) &&
716 atomic_read(&fp->fi_access[O_WRONLY]))
717 return nfserr_share_denied;
718 }
719 return nfs_ok;
720}
721
722static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
723{
724 might_lock(&fp->fi_lock);
725
726 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
727 struct nfsd_file *f1 = NULL;
728 struct nfsd_file *f2 = NULL;
729
730 swap(f1, fp->fi_fds[oflag]);
731 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
732 swap(f2, fp->fi_fds[O_RDWR]);
733 spin_unlock(&fp->fi_lock);
734 if (f1)
735 nfsd_file_put(f1);
736 if (f2)
737 nfsd_file_put(f2);
738 }
739}
740
741static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
742{
743 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
744
745 if (access & NFS4_SHARE_ACCESS_WRITE)
746 __nfs4_file_put_access(fp, O_WRONLY);
747 if (access & NFS4_SHARE_ACCESS_READ)
748 __nfs4_file_put_access(fp, O_RDONLY);
749}
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755
756
757
758static struct nfs4_clnt_odstate *
759alloc_clnt_odstate(struct nfs4_client *clp)
760{
761 struct nfs4_clnt_odstate *co;
762
763 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
764 if (co) {
765 co->co_client = clp;
766 refcount_set(&co->co_odcount, 1);
767 }
768 return co;
769}
770
771static void
772hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
773{
774 struct nfs4_file *fp = co->co_file;
775
776 lockdep_assert_held(&fp->fi_lock);
777 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
778}
779
780static inline void
781get_clnt_odstate(struct nfs4_clnt_odstate *co)
782{
783 if (co)
784 refcount_inc(&co->co_odcount);
785}
786
787static void
788put_clnt_odstate(struct nfs4_clnt_odstate *co)
789{
790 struct nfs4_file *fp;
791
792 if (!co)
793 return;
794
795 fp = co->co_file;
796 if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
797 list_del(&co->co_perfile);
798 spin_unlock(&fp->fi_lock);
799
800 nfsd4_return_all_file_layouts(co->co_client, fp);
801 kmem_cache_free(odstate_slab, co);
802 }
803}
804
805static struct nfs4_clnt_odstate *
806find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
807{
808 struct nfs4_clnt_odstate *co;
809 struct nfs4_client *cl;
810
811 if (!new)
812 return NULL;
813
814 cl = new->co_client;
815
816 spin_lock(&fp->fi_lock);
817 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
818 if (co->co_client == cl) {
819 get_clnt_odstate(co);
820 goto out;
821 }
822 }
823 co = new;
824 co->co_file = fp;
825 hash_clnt_odstate_locked(new);
826out:
827 spin_unlock(&fp->fi_lock);
828 return co;
829}
830
831struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
832 void (*sc_free)(struct nfs4_stid *))
833{
834 struct nfs4_stid *stid;
835 int new_id;
836
837 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
838 if (!stid)
839 return NULL;
840
841 idr_preload(GFP_KERNEL);
842 spin_lock(&cl->cl_lock);
843
844 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);
845 spin_unlock(&cl->cl_lock);
846 idr_preload_end();
847 if (new_id < 0)
848 goto out_free;
849
850 stid->sc_free = sc_free;
851 stid->sc_client = cl;
852 stid->sc_stateid.si_opaque.so_id = new_id;
853 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
854
855 refcount_set(&stid->sc_count, 1);
856 spin_lock_init(&stid->sc_lock);
857 INIT_LIST_HEAD(&stid->sc_cp_list);
858
859
860
861
862
863
864
865
866
867
868 return stid;
869out_free:
870 kmem_cache_free(slab, stid);
871 return NULL;
872}
873
874
875
876
877static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid,
878 unsigned char sc_type)
879{
880 int new_id;
881
882 stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
883 stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
884 stid->sc_type = sc_type;
885
886 idr_preload(GFP_KERNEL);
887 spin_lock(&nn->s2s_cp_lock);
888 new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT);
889 stid->stid.si_opaque.so_id = new_id;
890 stid->stid.si_generation = 1;
891 spin_unlock(&nn->s2s_cp_lock);
892 idr_preload_end();
893 if (new_id < 0)
894 return 0;
895 return 1;
896}
897
898int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy)
899{
900 return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID);
901}
902
903struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
904 struct nfs4_stid *p_stid)
905{
906 struct nfs4_cpntf_state *cps;
907
908 cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL);
909 if (!cps)
910 return NULL;
911 cps->cpntf_time = ktime_get_boottime_seconds();
912 refcount_set(&cps->cp_stateid.sc_count, 1);
913 if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID))
914 goto out_free;
915 spin_lock(&nn->s2s_cp_lock);
916 list_add(&cps->cp_list, &p_stid->sc_cp_list);
917 spin_unlock(&nn->s2s_cp_lock);
918 return cps;
919out_free:
920 kfree(cps);
921 return NULL;
922}
923
924void nfs4_free_copy_state(struct nfsd4_copy *copy)
925{
926 struct nfsd_net *nn;
927
928 WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID);
929 nn = net_generic(copy->cp_clp->net, nfsd_net_id);
930 spin_lock(&nn->s2s_cp_lock);
931 idr_remove(&nn->s2s_cp_stateids,
932 copy->cp_stateid.stid.si_opaque.so_id);
933 spin_unlock(&nn->s2s_cp_lock);
934}
935
936static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid)
937{
938 struct nfs4_cpntf_state *cps;
939 struct nfsd_net *nn;
940
941 nn = net_generic(net, nfsd_net_id);
942 spin_lock(&nn->s2s_cp_lock);
943 while (!list_empty(&stid->sc_cp_list)) {
944 cps = list_first_entry(&stid->sc_cp_list,
945 struct nfs4_cpntf_state, cp_list);
946 _free_cpntf_state_locked(nn, cps);
947 }
948 spin_unlock(&nn->s2s_cp_lock);
949}
950
951static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
952{
953 struct nfs4_stid *stid;
954
955 stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid);
956 if (!stid)
957 return NULL;
958
959 return openlockstateid(stid);
960}
961
962static void nfs4_free_deleg(struct nfs4_stid *stid)
963{
964 kmem_cache_free(deleg_slab, stid);
965 atomic_long_dec(&num_delegations);
966}
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986static DEFINE_SPINLOCK(blocked_delegations_lock);
987static struct bloom_pair {
988 int entries, old_entries;
989 time64_t swap_time;
990 int new;
991 DECLARE_BITMAP(set[2], 256);
992} blocked_delegations;
993
994static int delegation_blocked(struct knfsd_fh *fh)
995{
996 u32 hash;
997 struct bloom_pair *bd = &blocked_delegations;
998
999 if (bd->entries == 0)
1000 return 0;
1001 if (ktime_get_seconds() - bd->swap_time > 30) {
1002 spin_lock(&blocked_delegations_lock);
1003 if (ktime_get_seconds() - bd->swap_time > 30) {
1004 bd->entries -= bd->old_entries;
1005 bd->old_entries = bd->entries;
1006 memset(bd->set[bd->new], 0,
1007 sizeof(bd->set[0]));
1008 bd->new = 1-bd->new;
1009 bd->swap_time = ktime_get_seconds();
1010 }
1011 spin_unlock(&blocked_delegations_lock);
1012 }
1013 hash = jhash(&fh->fh_raw, fh->fh_size, 0);
1014 if (test_bit(hash&255, bd->set[0]) &&
1015 test_bit((hash>>8)&255, bd->set[0]) &&
1016 test_bit((hash>>16)&255, bd->set[0]))
1017 return 1;
1018
1019 if (test_bit(hash&255, bd->set[1]) &&
1020 test_bit((hash>>8)&255, bd->set[1]) &&
1021 test_bit((hash>>16)&255, bd->set[1]))
1022 return 1;
1023
1024 return 0;
1025}
1026
1027static void block_delegations(struct knfsd_fh *fh)
1028{
1029 u32 hash;
1030 struct bloom_pair *bd = &blocked_delegations;
1031
1032 hash = jhash(&fh->fh_raw, fh->fh_size, 0);
1033
1034 spin_lock(&blocked_delegations_lock);
1035 __set_bit(hash&255, bd->set[bd->new]);
1036 __set_bit((hash>>8)&255, bd->set[bd->new]);
1037 __set_bit((hash>>16)&255, bd->set[bd->new]);
1038 if (bd->entries == 0)
1039 bd->swap_time = ktime_get_seconds();
1040 bd->entries += 1;
1041 spin_unlock(&blocked_delegations_lock);
1042}
1043
1044static struct nfs4_delegation *
1045alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
1046 struct svc_fh *current_fh,
1047 struct nfs4_clnt_odstate *odstate)
1048{
1049 struct nfs4_delegation *dp;
1050 long n;
1051
1052 dprintk("NFSD alloc_init_deleg\n");
1053 n = atomic_long_inc_return(&num_delegations);
1054 if (n < 0 || n > max_delegations)
1055 goto out_dec;
1056 if (delegation_blocked(¤t_fh->fh_handle))
1057 goto out_dec;
1058 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg));
1059 if (dp == NULL)
1060 goto out_dec;
1061
1062
1063
1064
1065
1066
1067 dp->dl_stid.sc_stateid.si_generation = 1;
1068 INIT_LIST_HEAD(&dp->dl_perfile);
1069 INIT_LIST_HEAD(&dp->dl_perclnt);
1070 INIT_LIST_HEAD(&dp->dl_recall_lru);
1071 dp->dl_clnt_odstate = odstate;
1072 get_clnt_odstate(odstate);
1073 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
1074 dp->dl_retries = 1;
1075 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
1076 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
1077 get_nfs4_file(fp);
1078 dp->dl_stid.sc_file = fp;
1079 return dp;
1080out_dec:
1081 atomic_long_dec(&num_delegations);
1082 return NULL;
1083}
1084
1085void
1086nfs4_put_stid(struct nfs4_stid *s)
1087{
1088 struct nfs4_file *fp = s->sc_file;
1089 struct nfs4_client *clp = s->sc_client;
1090
1091 might_lock(&clp->cl_lock);
1092
1093 if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
1094 wake_up_all(&close_wq);
1095 return;
1096 }
1097 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1098 nfs4_free_cpntf_statelist(clp->net, s);
1099 spin_unlock(&clp->cl_lock);
1100 s->sc_free(s);
1101 if (fp)
1102 put_nfs4_file(fp);
1103}
1104
1105void
1106nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
1107{
1108 stateid_t *src = &stid->sc_stateid;
1109
1110 spin_lock(&stid->sc_lock);
1111 if (unlikely(++src->si_generation == 0))
1112 src->si_generation = 1;
1113 memcpy(dst, src, sizeof(*dst));
1114 spin_unlock(&stid->sc_lock);
1115}
1116
1117static void put_deleg_file(struct nfs4_file *fp)
1118{
1119 struct nfsd_file *nf = NULL;
1120
1121 spin_lock(&fp->fi_lock);
1122 if (--fp->fi_delegees == 0)
1123 swap(nf, fp->fi_deleg_file);
1124 spin_unlock(&fp->fi_lock);
1125
1126 if (nf)
1127 nfsd_file_put(nf);
1128}
1129
1130static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp)
1131{
1132 struct nfs4_file *fp = dp->dl_stid.sc_file;
1133 struct nfsd_file *nf = fp->fi_deleg_file;
1134
1135 WARN_ON_ONCE(!fp->fi_delegees);
1136
1137 vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp);
1138 put_deleg_file(fp);
1139}
1140
1141static void destroy_unhashed_deleg(struct nfs4_delegation *dp)
1142{
1143 put_clnt_odstate(dp->dl_clnt_odstate);
1144 nfs4_unlock_deleg_lease(dp);
1145 nfs4_put_stid(&dp->dl_stid);
1146}
1147
1148void nfs4_unhash_stid(struct nfs4_stid *s)
1149{
1150 s->sc_type = 0;
1151}
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162static bool
1163nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp)
1164{
1165 struct nfs4_delegation *searchdp = NULL;
1166 struct nfs4_client *searchclp = NULL;
1167
1168 lockdep_assert_held(&state_lock);
1169 lockdep_assert_held(&fp->fi_lock);
1170
1171 list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {
1172 searchclp = searchdp->dl_stid.sc_client;
1173 if (clp == searchclp) {
1174 return true;
1175 }
1176 }
1177 return false;
1178}
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193static int
1194hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
1195{
1196 struct nfs4_client *clp = dp->dl_stid.sc_client;
1197
1198 lockdep_assert_held(&state_lock);
1199 lockdep_assert_held(&fp->fi_lock);
1200
1201 if (nfs4_delegation_exists(clp, fp))
1202 return -EAGAIN;
1203 refcount_inc(&dp->dl_stid.sc_count);
1204 dp->dl_stid.sc_type = NFS4_DELEG_STID;
1205 list_add(&dp->dl_perfile, &fp->fi_delegations);
1206 list_add(&dp->dl_perclnt, &clp->cl_delegations);
1207 return 0;
1208}
1209
1210static bool delegation_hashed(struct nfs4_delegation *dp)
1211{
1212 return !(list_empty(&dp->dl_perfile));
1213}
1214
1215static bool
1216unhash_delegation_locked(struct nfs4_delegation *dp)
1217{
1218 struct nfs4_file *fp = dp->dl_stid.sc_file;
1219
1220 lockdep_assert_held(&state_lock);
1221
1222 if (!delegation_hashed(dp))
1223 return false;
1224
1225 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
1226
1227 ++dp->dl_time;
1228 spin_lock(&fp->fi_lock);
1229 list_del_init(&dp->dl_perclnt);
1230 list_del_init(&dp->dl_recall_lru);
1231 list_del_init(&dp->dl_perfile);
1232 spin_unlock(&fp->fi_lock);
1233 return true;
1234}
1235
1236static void destroy_delegation(struct nfs4_delegation *dp)
1237{
1238 bool unhashed;
1239
1240 spin_lock(&state_lock);
1241 unhashed = unhash_delegation_locked(dp);
1242 spin_unlock(&state_lock);
1243 if (unhashed)
1244 destroy_unhashed_deleg(dp);
1245}
1246
1247static void revoke_delegation(struct nfs4_delegation *dp)
1248{
1249 struct nfs4_client *clp = dp->dl_stid.sc_client;
1250
1251 WARN_ON(!list_empty(&dp->dl_recall_lru));
1252
1253 if (clp->cl_minorversion) {
1254 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
1255 refcount_inc(&dp->dl_stid.sc_count);
1256 spin_lock(&clp->cl_lock);
1257 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
1258 spin_unlock(&clp->cl_lock);
1259 }
1260 destroy_unhashed_deleg(dp);
1261}
1262
1263
1264
1265
1266
1267static unsigned int clientid_hashval(u32 id)
1268{
1269 return id & CLIENT_HASH_MASK;
1270}
1271
1272static unsigned int clientstr_hashval(struct xdr_netobj name)
1273{
1274 return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK;
1275}
1276
1277
1278
1279
1280
1281static void
1282recalculate_deny_mode(struct nfs4_file *fp)
1283{
1284 struct nfs4_ol_stateid *stp;
1285
1286 spin_lock(&fp->fi_lock);
1287 fp->fi_share_deny = 0;
1288 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
1289 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
1290 spin_unlock(&fp->fi_lock);
1291}
1292
1293static void
1294reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
1295{
1296 int i;
1297 bool change = false;
1298
1299 for (i = 1; i < 4; i++) {
1300 if ((i & deny) != i) {
1301 change = true;
1302 clear_deny(i, stp);
1303 }
1304 }
1305
1306
1307 if (change)
1308 recalculate_deny_mode(stp->st_stid.sc_file);
1309}
1310
1311
1312static void
1313release_all_access(struct nfs4_ol_stateid *stp)
1314{
1315 int i;
1316 struct nfs4_file *fp = stp->st_stid.sc_file;
1317
1318 if (fp && stp->st_deny_bmap != 0)
1319 recalculate_deny_mode(fp);
1320
1321 for (i = 1; i < 4; i++) {
1322 if (test_access(i, stp))
1323 nfs4_file_put_access(stp->st_stid.sc_file, i);
1324 clear_access(i, stp);
1325 }
1326}
1327
1328static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
1329{
1330 kfree(sop->so_owner.data);
1331 sop->so_ops->so_free(sop);
1332}
1333
1334static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
1335{
1336 struct nfs4_client *clp = sop->so_client;
1337
1338 might_lock(&clp->cl_lock);
1339
1340 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
1341 return;
1342 sop->so_ops->so_unhash(sop);
1343 spin_unlock(&clp->cl_lock);
1344 nfs4_free_stateowner(sop);
1345}
1346
1347static bool
1348nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp)
1349{
1350 return list_empty(&stp->st_perfile);
1351}
1352
1353static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
1354{
1355 struct nfs4_file *fp = stp->st_stid.sc_file;
1356
1357 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1358
1359 if (list_empty(&stp->st_perfile))
1360 return false;
1361
1362 spin_lock(&fp->fi_lock);
1363 list_del_init(&stp->st_perfile);
1364 spin_unlock(&fp->fi_lock);
1365 list_del(&stp->st_perstateowner);
1366 return true;
1367}
1368
1369static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
1370{
1371 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1372
1373 put_clnt_odstate(stp->st_clnt_odstate);
1374 release_all_access(stp);
1375 if (stp->st_stateowner)
1376 nfs4_put_stateowner(stp->st_stateowner);
1377 kmem_cache_free(stateid_slab, stid);
1378}
1379
1380static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
1381{
1382 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1383 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
1384 struct nfsd_file *nf;
1385
1386 nf = find_any_file(stp->st_stid.sc_file);
1387 if (nf) {
1388 get_file(nf->nf_file);
1389 filp_close(nf->nf_file, (fl_owner_t)lo);
1390 nfsd_file_put(nf);
1391 }
1392 nfs4_free_ol_stateid(stid);
1393}
1394
1395
1396
1397
1398
1399
1400static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1401 struct list_head *reaplist)
1402{
1403 struct nfs4_stid *s = &stp->st_stid;
1404 struct nfs4_client *clp = s->sc_client;
1405
1406 lockdep_assert_held(&clp->cl_lock);
1407
1408 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1409
1410 if (!refcount_dec_and_test(&s->sc_count)) {
1411 wake_up_all(&close_wq);
1412 return;
1413 }
1414
1415 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1416 list_add(&stp->st_locks, reaplist);
1417}
1418
1419static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
1420{
1421 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1422
1423 if (!unhash_ol_stateid(stp))
1424 return false;
1425 list_del_init(&stp->st_locks);
1426 nfs4_unhash_stid(&stp->st_stid);
1427 return true;
1428}
1429
1430static void release_lock_stateid(struct nfs4_ol_stateid *stp)
1431{
1432 struct nfs4_client *clp = stp->st_stid.sc_client;
1433 bool unhashed;
1434
1435 spin_lock(&clp->cl_lock);
1436 unhashed = unhash_lock_stateid(stp);
1437 spin_unlock(&clp->cl_lock);
1438 if (unhashed)
1439 nfs4_put_stid(&stp->st_stid);
1440}
1441
1442static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
1443{
1444 struct nfs4_client *clp = lo->lo_owner.so_client;
1445
1446 lockdep_assert_held(&clp->cl_lock);
1447
1448 list_del_init(&lo->lo_owner.so_strhash);
1449}
1450
1451
1452
1453
1454
1455static void
1456free_ol_stateid_reaplist(struct list_head *reaplist)
1457{
1458 struct nfs4_ol_stateid *stp;
1459 struct nfs4_file *fp;
1460
1461 might_sleep();
1462
1463 while (!list_empty(reaplist)) {
1464 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1465 st_locks);
1466 list_del(&stp->st_locks);
1467 fp = stp->st_stid.sc_file;
1468 stp->st_stid.sc_free(&stp->st_stid);
1469 if (fp)
1470 put_nfs4_file(fp);
1471 }
1472}
1473
1474static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1475 struct list_head *reaplist)
1476{
1477 struct nfs4_ol_stateid *stp;
1478
1479 lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);
1480
1481 while (!list_empty(&open_stp->st_locks)) {
1482 stp = list_entry(open_stp->st_locks.next,
1483 struct nfs4_ol_stateid, st_locks);
1484 WARN_ON(!unhash_lock_stateid(stp));
1485 put_ol_stateid_locked(stp, reaplist);
1486 }
1487}
1488
1489static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
1490 struct list_head *reaplist)
1491{
1492 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1493
1494 if (!unhash_ol_stateid(stp))
1495 return false;
1496 release_open_stateid_locks(stp, reaplist);
1497 return true;
1498}
1499
1500static void release_open_stateid(struct nfs4_ol_stateid *stp)
1501{
1502 LIST_HEAD(reaplist);
1503
1504 spin_lock(&stp->st_stid.sc_client->cl_lock);
1505 if (unhash_open_stateid(stp, &reaplist))
1506 put_ol_stateid_locked(stp, &reaplist);
1507 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1508 free_ol_stateid_reaplist(&reaplist);
1509}
1510
1511static void unhash_openowner_locked(struct nfs4_openowner *oo)
1512{
1513 struct nfs4_client *clp = oo->oo_owner.so_client;
1514
1515 lockdep_assert_held(&clp->cl_lock);
1516
1517 list_del_init(&oo->oo_owner.so_strhash);
1518 list_del_init(&oo->oo_perclient);
1519}
1520
1521static void release_last_closed_stateid(struct nfs4_openowner *oo)
1522{
1523 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1524 nfsd_net_id);
1525 struct nfs4_ol_stateid *s;
1526
1527 spin_lock(&nn->client_lock);
1528 s = oo->oo_last_closed_stid;
1529 if (s) {
1530 list_del_init(&oo->oo_close_lru);
1531 oo->oo_last_closed_stid = NULL;
1532 }
1533 spin_unlock(&nn->client_lock);
1534 if (s)
1535 nfs4_put_stid(&s->st_stid);
1536}
1537
1538static void release_openowner(struct nfs4_openowner *oo)
1539{
1540 struct nfs4_ol_stateid *stp;
1541 struct nfs4_client *clp = oo->oo_owner.so_client;
1542 struct list_head reaplist;
1543
1544 INIT_LIST_HEAD(&reaplist);
1545
1546 spin_lock(&clp->cl_lock);
1547 unhash_openowner_locked(oo);
1548 while (!list_empty(&oo->oo_owner.so_stateids)) {
1549 stp = list_first_entry(&oo->oo_owner.so_stateids,
1550 struct nfs4_ol_stateid, st_perstateowner);
1551 if (unhash_open_stateid(stp, &reaplist))
1552 put_ol_stateid_locked(stp, &reaplist);
1553 }
1554 spin_unlock(&clp->cl_lock);
1555 free_ol_stateid_reaplist(&reaplist);
1556 release_last_closed_stateid(oo);
1557 nfs4_put_stateowner(&oo->oo_owner);
1558}
1559
1560static inline int
1561hash_sessionid(struct nfs4_sessionid *sessionid)
1562{
1563 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1564
1565 return sid->sequence % SESSION_HASH_SIZE;
1566}
1567
1568#ifdef CONFIG_SUNRPC_DEBUG
1569static inline void
1570dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1571{
1572 u32 *ptr = (u32 *)(&sessionid->data[0]);
1573 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1574}
1575#else
1576static inline void
1577dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1578{
1579}
1580#endif
1581
1582
1583
1584
1585
1586void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1587{
1588 struct nfs4_stateowner *so = cstate->replay_owner;
1589
1590 if (nfserr == nfserr_replay_me)
1591 return;
1592
1593 if (!seqid_mutating_err(ntohl(nfserr))) {
1594 nfsd4_cstate_clear_replay(cstate);
1595 return;
1596 }
1597 if (!so)
1598 return;
1599 if (so->so_is_open_owner)
1600 release_last_closed_stateid(openowner(so));
1601 so->so_seqid++;
1602 return;
1603}
1604
1605static void
1606gen_sessionid(struct nfsd4_session *ses)
1607{
1608 struct nfs4_client *clp = ses->se_client;
1609 struct nfsd4_sessionid *sid;
1610
1611 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1612 sid->clientid = clp->cl_clientid;
1613 sid->sequence = current_sessionid++;
1614 sid->reserved = 0;
1615}
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1630
1631static void
1632free_session_slots(struct nfsd4_session *ses)
1633{
1634 int i;
1635
1636 for (i = 0; i < ses->se_fchannel.maxreqs; i++) {
1637 free_svc_cred(&ses->se_slots[i]->sl_cred);
1638 kfree(ses->se_slots[i]);
1639 }
1640}
1641
1642
1643
1644
1645
1646static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1647{
1648 u32 size;
1649
1650 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1651 size = 0;
1652 else
1653 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1654 return size + sizeof(struct nfsd4_slot);
1655}
1656
1657
1658
1659
1660
1661
1662static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
1663{
1664 u32 slotsize = slot_bytes(ca);
1665 u32 num = ca->maxreqs;
1666 unsigned long avail, total_avail;
1667 unsigned int scale_factor;
1668
1669 spin_lock(&nfsd_drc_lock);
1670 if (nfsd_drc_max_mem > nfsd_drc_mem_used)
1671 total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;
1672 else
1673
1674
1675
1676
1677
1678 total_avail = 0;
1679 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail);
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689 scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads);
1690
1691 avail = clamp_t(unsigned long, avail, slotsize,
1692 total_avail/scale_factor);
1693 num = min_t(int, num, avail / slotsize);
1694 num = max_t(int, num, 1);
1695 nfsd_drc_mem_used += num * slotsize;
1696 spin_unlock(&nfsd_drc_lock);
1697
1698 return num;
1699}
1700
1701static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1702{
1703 int slotsize = slot_bytes(ca);
1704
1705 spin_lock(&nfsd_drc_lock);
1706 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1707 spin_unlock(&nfsd_drc_lock);
1708}
1709
1710static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1711 struct nfsd4_channel_attrs *battrs)
1712{
1713 int numslots = fattrs->maxreqs;
1714 int slotsize = slot_bytes(fattrs);
1715 struct nfsd4_session *new;
1716 int mem, i;
1717
1718 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1719 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1720 mem = numslots * sizeof(struct nfsd4_slot *);
1721
1722 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1723 if (!new)
1724 return NULL;
1725
1726 for (i = 0; i < numslots; i++) {
1727 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1728 if (!new->se_slots[i])
1729 goto out_free;
1730 }
1731
1732 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1733 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1734
1735 return new;
1736out_free:
1737 while (i--)
1738 kfree(new->se_slots[i]);
1739 kfree(new);
1740 return NULL;
1741}
1742
1743static void free_conn(struct nfsd4_conn *c)
1744{
1745 svc_xprt_put(c->cn_xprt);
1746 kfree(c);
1747}
1748
1749static void nfsd4_conn_lost(struct svc_xpt_user *u)
1750{
1751 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1752 struct nfs4_client *clp = c->cn_session->se_client;
1753
1754 trace_nfsd_cb_lost(clp);
1755
1756 spin_lock(&clp->cl_lock);
1757 if (!list_empty(&c->cn_persession)) {
1758 list_del(&c->cn_persession);
1759 free_conn(c);
1760 }
1761 nfsd4_probe_callback(clp);
1762 spin_unlock(&clp->cl_lock);
1763}
1764
1765static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1766{
1767 struct nfsd4_conn *conn;
1768
1769 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1770 if (!conn)
1771 return NULL;
1772 svc_xprt_get(rqstp->rq_xprt);
1773 conn->cn_xprt = rqstp->rq_xprt;
1774 conn->cn_flags = flags;
1775 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1776 return conn;
1777}
1778
1779static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1780{
1781 conn->cn_session = ses;
1782 list_add(&conn->cn_persession, &ses->se_conns);
1783}
1784
1785static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1786{
1787 struct nfs4_client *clp = ses->se_client;
1788
1789 spin_lock(&clp->cl_lock);
1790 __nfsd4_hash_conn(conn, ses);
1791 spin_unlock(&clp->cl_lock);
1792}
1793
1794static int nfsd4_register_conn(struct nfsd4_conn *conn)
1795{
1796 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1797 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1798}
1799
1800static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1801{
1802 int ret;
1803
1804 nfsd4_hash_conn(conn, ses);
1805 ret = nfsd4_register_conn(conn);
1806 if (ret)
1807
1808 nfsd4_conn_lost(&conn->cn_xpt_user);
1809
1810 nfsd4_probe_callback_sync(ses->se_client);
1811}
1812
1813static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1814{
1815 u32 dir = NFS4_CDFC4_FORE;
1816
1817 if (cses->flags & SESSION4_BACK_CHAN)
1818 dir |= NFS4_CDFC4_BACK;
1819 return alloc_conn(rqstp, dir);
1820}
1821
1822
1823static void nfsd4_del_conns(struct nfsd4_session *s)
1824{
1825 struct nfs4_client *clp = s->se_client;
1826 struct nfsd4_conn *c;
1827
1828 spin_lock(&clp->cl_lock);
1829 while (!list_empty(&s->se_conns)) {
1830 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1831 list_del_init(&c->cn_persession);
1832 spin_unlock(&clp->cl_lock);
1833
1834 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1835 free_conn(c);
1836
1837 spin_lock(&clp->cl_lock);
1838 }
1839 spin_unlock(&clp->cl_lock);
1840}
1841
1842static void __free_session(struct nfsd4_session *ses)
1843{
1844 free_session_slots(ses);
1845 kfree(ses);
1846}
1847
1848static void free_session(struct nfsd4_session *ses)
1849{
1850 nfsd4_del_conns(ses);
1851 nfsd4_put_drc_mem(&ses->se_fchannel);
1852 __free_session(ses);
1853}
1854
1855static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1856{
1857 int idx;
1858 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1859
1860 new->se_client = clp;
1861 gen_sessionid(new);
1862
1863 INIT_LIST_HEAD(&new->se_conns);
1864
1865 new->se_cb_seq_nr = 1;
1866 new->se_flags = cses->flags;
1867 new->se_cb_prog = cses->callback_prog;
1868 new->se_cb_sec = cses->cb_sec;
1869 atomic_set(&new->se_ref, 0);
1870 idx = hash_sessionid(&new->se_sessionid);
1871 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1872 spin_lock(&clp->cl_lock);
1873 list_add(&new->se_perclnt, &clp->cl_sessions);
1874 spin_unlock(&clp->cl_lock);
1875
1876 {
1877 struct sockaddr *sa = svc_addr(rqstp);
1878
1879
1880
1881
1882
1883
1884
1885 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1886 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1887 }
1888}
1889
1890
1891static struct nfsd4_session *
1892__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1893{
1894 struct nfsd4_session *elem;
1895 int idx;
1896 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1897
1898 lockdep_assert_held(&nn->client_lock);
1899
1900 dump_sessionid(__func__, sessionid);
1901 idx = hash_sessionid(sessionid);
1902
1903 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1904 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1905 NFS4_MAX_SESSIONID_LEN)) {
1906 return elem;
1907 }
1908 }
1909
1910 dprintk("%s: session not found\n", __func__);
1911 return NULL;
1912}
1913
1914static struct nfsd4_session *
1915find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1916 __be32 *ret)
1917{
1918 struct nfsd4_session *session;
1919 __be32 status = nfserr_badsession;
1920
1921 session = __find_in_sessionid_hashtbl(sessionid, net);
1922 if (!session)
1923 goto out;
1924 status = nfsd4_get_session_locked(session);
1925 if (status)
1926 session = NULL;
1927out:
1928 *ret = status;
1929 return session;
1930}
1931
1932
1933static void
1934unhash_session(struct nfsd4_session *ses)
1935{
1936 struct nfs4_client *clp = ses->se_client;
1937 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1938
1939 lockdep_assert_held(&nn->client_lock);
1940
1941 list_del(&ses->se_hash);
1942 spin_lock(&ses->se_client->cl_lock);
1943 list_del(&ses->se_perclnt);
1944 spin_unlock(&ses->se_client->cl_lock);
1945}
1946
1947
1948static int
1949STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1950{
1951
1952
1953
1954
1955
1956 if (clid->cl_boot == (u32)nn->boot_time)
1957 return 0;
1958 trace_nfsd_clid_stale(clid);
1959 return 1;
1960}
1961
1962
1963
1964
1965
1966
1967static struct nfs4_client *alloc_client(struct xdr_netobj name)
1968{
1969 struct nfs4_client *clp;
1970 int i;
1971
1972 clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
1973 if (clp == NULL)
1974 return NULL;
1975 xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);
1976 if (clp->cl_name.data == NULL)
1977 goto err_no_name;
1978 clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,
1979 sizeof(struct list_head),
1980 GFP_KERNEL);
1981 if (!clp->cl_ownerstr_hashtbl)
1982 goto err_no_hashtbl;
1983 for (i = 0; i < OWNER_HASH_SIZE; i++)
1984 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
1985 INIT_LIST_HEAD(&clp->cl_sessions);
1986 idr_init(&clp->cl_stateids);
1987 atomic_set(&clp->cl_rpc_users, 0);
1988 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1989 INIT_LIST_HEAD(&clp->cl_idhash);
1990 INIT_LIST_HEAD(&clp->cl_openowners);
1991 INIT_LIST_HEAD(&clp->cl_delegations);
1992 INIT_LIST_HEAD(&clp->cl_lru);
1993 INIT_LIST_HEAD(&clp->cl_revoked);
1994#ifdef CONFIG_NFSD_PNFS
1995 INIT_LIST_HEAD(&clp->cl_lo_states);
1996#endif
1997 INIT_LIST_HEAD(&clp->async_copies);
1998 spin_lock_init(&clp->async_lock);
1999 spin_lock_init(&clp->cl_lock);
2000 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
2001 return clp;
2002err_no_hashtbl:
2003 kfree(clp->cl_name.data);
2004err_no_name:
2005 kmem_cache_free(client_slab, clp);
2006 return NULL;
2007}
2008
2009static void __free_client(struct kref *k)
2010{
2011 struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref);
2012 struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs);
2013
2014 free_svc_cred(&clp->cl_cred);
2015 kfree(clp->cl_ownerstr_hashtbl);
2016 kfree(clp->cl_name.data);
2017 kfree(clp->cl_nii_domain.data);
2018 kfree(clp->cl_nii_name.data);
2019 idr_destroy(&clp->cl_stateids);
2020 kmem_cache_free(client_slab, clp);
2021}
2022
2023static void drop_client(struct nfs4_client *clp)
2024{
2025 kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);
2026}
2027
2028static void
2029free_client(struct nfs4_client *clp)
2030{
2031 while (!list_empty(&clp->cl_sessions)) {
2032 struct nfsd4_session *ses;
2033 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
2034 se_perclnt);
2035 list_del(&ses->se_perclnt);
2036 WARN_ON_ONCE(atomic_read(&ses->se_ref));
2037 free_session(ses);
2038 }
2039 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
2040 if (clp->cl_nfsd_dentry) {
2041 nfsd_client_rmdir(clp->cl_nfsd_dentry);
2042 clp->cl_nfsd_dentry = NULL;
2043 wake_up_all(&expiry_wq);
2044 }
2045 drop_client(clp);
2046}
2047
2048
2049static void
2050unhash_client_locked(struct nfs4_client *clp)
2051{
2052 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2053 struct nfsd4_session *ses;
2054
2055 lockdep_assert_held(&nn->client_lock);
2056
2057
2058 clp->cl_time = 0;
2059
2060 if (!list_empty(&clp->cl_idhash)) {
2061 list_del_init(&clp->cl_idhash);
2062 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
2063 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
2064 else
2065 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
2066 }
2067 list_del_init(&clp->cl_lru);
2068 spin_lock(&clp->cl_lock);
2069 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
2070 list_del_init(&ses->se_hash);
2071 spin_unlock(&clp->cl_lock);
2072}
2073
2074static void
2075unhash_client(struct nfs4_client *clp)
2076{
2077 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2078
2079 spin_lock(&nn->client_lock);
2080 unhash_client_locked(clp);
2081 spin_unlock(&nn->client_lock);
2082}
2083
2084static __be32 mark_client_expired_locked(struct nfs4_client *clp)
2085{
2086 if (atomic_read(&clp->cl_rpc_users))
2087 return nfserr_jukebox;
2088 unhash_client_locked(clp);
2089 return nfs_ok;
2090}
2091
2092static void
2093__destroy_client(struct nfs4_client *clp)
2094{
2095 int i;
2096 struct nfs4_openowner *oo;
2097 struct nfs4_delegation *dp;
2098 struct list_head reaplist;
2099
2100 INIT_LIST_HEAD(&reaplist);
2101 spin_lock(&state_lock);
2102 while (!list_empty(&clp->cl_delegations)) {
2103 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
2104 WARN_ON(!unhash_delegation_locked(dp));
2105 list_add(&dp->dl_recall_lru, &reaplist);
2106 }
2107 spin_unlock(&state_lock);
2108 while (!list_empty(&reaplist)) {
2109 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
2110 list_del_init(&dp->dl_recall_lru);
2111 destroy_unhashed_deleg(dp);
2112 }
2113 while (!list_empty(&clp->cl_revoked)) {
2114 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
2115 list_del_init(&dp->dl_recall_lru);
2116 nfs4_put_stid(&dp->dl_stid);
2117 }
2118 while (!list_empty(&clp->cl_openowners)) {
2119 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
2120 nfs4_get_stateowner(&oo->oo_owner);
2121 release_openowner(oo);
2122 }
2123 for (i = 0; i < OWNER_HASH_SIZE; i++) {
2124 struct nfs4_stateowner *so, *tmp;
2125
2126 list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],
2127 so_strhash) {
2128
2129 WARN_ON_ONCE(so->so_is_open_owner);
2130 remove_blocked_locks(lockowner(so));
2131 }
2132 }
2133 nfsd4_return_all_client_layouts(clp);
2134 nfsd4_shutdown_copy(clp);
2135 nfsd4_shutdown_callback(clp);
2136 if (clp->cl_cb_conn.cb_xprt)
2137 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
2138 free_client(clp);
2139 wake_up_all(&expiry_wq);
2140}
2141
2142static void
2143destroy_client(struct nfs4_client *clp)
2144{
2145 unhash_client(clp);
2146 __destroy_client(clp);
2147}
2148
2149static void inc_reclaim_complete(struct nfs4_client *clp)
2150{
2151 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2152
2153 if (!nn->track_reclaim_completes)
2154 return;
2155 if (!nfsd4_find_reclaim_client(clp->cl_name, nn))
2156 return;
2157 if (atomic_inc_return(&nn->nr_reclaim_complete) ==
2158 nn->reclaim_str_hashtbl_size) {
2159 printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n",
2160 clp->net->ns.inum);
2161 nfsd4_end_grace(nn);
2162 }
2163}
2164
2165static void expire_client(struct nfs4_client *clp)
2166{
2167 unhash_client(clp);
2168 nfsd4_client_record_remove(clp);
2169 __destroy_client(clp);
2170}
2171
2172static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
2173{
2174 memcpy(target->cl_verifier.data, source->data,
2175 sizeof(target->cl_verifier.data));
2176}
2177
2178static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
2179{
2180 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
2181 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
2182}
2183
2184static int copy_cred(struct svc_cred *target, struct svc_cred *source)
2185{
2186 target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);
2187 target->cr_raw_principal = kstrdup(source->cr_raw_principal,
2188 GFP_KERNEL);
2189 target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL);
2190 if ((source->cr_principal && !target->cr_principal) ||
2191 (source->cr_raw_principal && !target->cr_raw_principal) ||
2192 (source->cr_targ_princ && !target->cr_targ_princ))
2193 return -ENOMEM;
2194
2195 target->cr_flavor = source->cr_flavor;
2196 target->cr_uid = source->cr_uid;
2197 target->cr_gid = source->cr_gid;
2198 target->cr_group_info = source->cr_group_info;
2199 get_group_info(target->cr_group_info);
2200 target->cr_gss_mech = source->cr_gss_mech;
2201 if (source->cr_gss_mech)
2202 gss_mech_get(source->cr_gss_mech);
2203 return 0;
2204}
2205
2206static int
2207compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
2208{
2209 if (o1->len < o2->len)
2210 return -1;
2211 if (o1->len > o2->len)
2212 return 1;
2213 return memcmp(o1->data, o2->data, o1->len);
2214}
2215
2216static int
2217same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
2218{
2219 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
2220}
2221
2222static int
2223same_clid(clientid_t *cl1, clientid_t *cl2)
2224{
2225 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
2226}
2227
2228static bool groups_equal(struct group_info *g1, struct group_info *g2)
2229{
2230 int i;
2231
2232 if (g1->ngroups != g2->ngroups)
2233 return false;
2234 for (i=0; i<g1->ngroups; i++)
2235 if (!gid_eq(g1->gid[i], g2->gid[i]))
2236 return false;
2237 return true;
2238}
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249static bool is_gss_cred(struct svc_cred *cr)
2250{
2251
2252 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
2253}
2254
2255
2256static bool
2257same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
2258{
2259 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
2260 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
2261 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
2262 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
2263 return false;
2264
2265 if (cr1->cr_principal == cr2->cr_principal)
2266 return true;
2267 if (!cr1->cr_principal || !cr2->cr_principal)
2268 return false;
2269 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
2270}
2271
2272static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
2273{
2274 struct svc_cred *cr = &rqstp->rq_cred;
2275 u32 service;
2276
2277 if (!cr->cr_gss_mech)
2278 return false;
2279 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
2280 return service == RPC_GSS_SVC_INTEGRITY ||
2281 service == RPC_GSS_SVC_PRIVACY;
2282}
2283
2284bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
2285{
2286 struct svc_cred *cr = &rqstp->rq_cred;
2287
2288 if (!cl->cl_mach_cred)
2289 return true;
2290 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
2291 return false;
2292 if (!svc_rqst_integrity_protected(rqstp))
2293 return false;
2294 if (cl->cl_cred.cr_raw_principal)
2295 return 0 == strcmp(cl->cl_cred.cr_raw_principal,
2296 cr->cr_raw_principal);
2297 if (!cr->cr_principal)
2298 return false;
2299 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
2300}
2301
2302static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
2303{
2304 __be32 verf[2];
2305
2306
2307
2308
2309
2310 verf[0] = (__force __be32)(u32)ktime_get_real_seconds();
2311 verf[1] = (__force __be32)nn->clverifier_counter++;
2312 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
2313}
2314
2315static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
2316{
2317 clp->cl_clientid.cl_boot = (u32)nn->boot_time;
2318 clp->cl_clientid.cl_id = nn->clientid_counter++;
2319 gen_confirm(clp, nn);
2320}
2321
2322static struct nfs4_stid *
2323find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
2324{
2325 struct nfs4_stid *ret;
2326
2327 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
2328 if (!ret || !ret->sc_type)
2329 return NULL;
2330 return ret;
2331}
2332
2333static struct nfs4_stid *
2334find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
2335{
2336 struct nfs4_stid *s;
2337
2338 spin_lock(&cl->cl_lock);
2339 s = find_stateid_locked(cl, t);
2340 if (s != NULL) {
2341 if (typemask & s->sc_type)
2342 refcount_inc(&s->sc_count);
2343 else
2344 s = NULL;
2345 }
2346 spin_unlock(&cl->cl_lock);
2347 return s;
2348}
2349
2350static struct nfs4_client *get_nfsdfs_clp(struct inode *inode)
2351{
2352 struct nfsdfs_client *nc;
2353 nc = get_nfsdfs_client(inode);
2354 if (!nc)
2355 return NULL;
2356 return container_of(nc, struct nfs4_client, cl_nfsdfs);
2357}
2358
2359static void seq_quote_mem(struct seq_file *m, char *data, int len)
2360{
2361 seq_printf(m, "\"");
2362 seq_escape_mem(m, data, len, ESCAPE_HEX | ESCAPE_NAP | ESCAPE_APPEND, "\"\\");
2363 seq_printf(m, "\"");
2364}
2365
2366static const char *cb_state2str(int state)
2367{
2368 switch (state) {
2369 case NFSD4_CB_UP:
2370 return "UP";
2371 case NFSD4_CB_UNKNOWN:
2372 return "UNKNOWN";
2373 case NFSD4_CB_DOWN:
2374 return "DOWN";
2375 case NFSD4_CB_FAULT:
2376 return "FAULT";
2377 }
2378 return "UNDEFINED";
2379}
2380
2381static int client_info_show(struct seq_file *m, void *v)
2382{
2383 struct inode *inode = m->private;
2384 struct nfs4_client *clp;
2385 u64 clid;
2386
2387 clp = get_nfsdfs_clp(inode);
2388 if (!clp)
2389 return -ENXIO;
2390 memcpy(&clid, &clp->cl_clientid, sizeof(clid));
2391 seq_printf(m, "clientid: 0x%llx\n", clid);
2392 seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
2393 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
2394 seq_puts(m, "status: confirmed\n");
2395 else
2396 seq_puts(m, "status: unconfirmed\n");
2397 seq_printf(m, "name: ");
2398 seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
2399 seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
2400 if (clp->cl_nii_domain.data) {
2401 seq_printf(m, "Implementation domain: ");
2402 seq_quote_mem(m, clp->cl_nii_domain.data,
2403 clp->cl_nii_domain.len);
2404 seq_printf(m, "\nImplementation name: ");
2405 seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);
2406 seq_printf(m, "\nImplementation time: [%lld, %ld]\n",
2407 clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
2408 }
2409 seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state));
2410 seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr);
2411 drop_client(clp);
2412
2413 return 0;
2414}
2415
2416static int client_info_open(struct inode *inode, struct file *file)
2417{
2418 return single_open(file, client_info_show, inode);
2419}
2420
2421static const struct file_operations client_info_fops = {
2422 .open = client_info_open,
2423 .read = seq_read,
2424 .llseek = seq_lseek,
2425 .release = single_release,
2426};
2427
2428static void *states_start(struct seq_file *s, loff_t *pos)
2429 __acquires(&clp->cl_lock)
2430{
2431 struct nfs4_client *clp = s->private;
2432 unsigned long id = *pos;
2433 void *ret;
2434
2435 spin_lock(&clp->cl_lock);
2436 ret = idr_get_next_ul(&clp->cl_stateids, &id);
2437 *pos = id;
2438 return ret;
2439}
2440
2441static void *states_next(struct seq_file *s, void *v, loff_t *pos)
2442{
2443 struct nfs4_client *clp = s->private;
2444 unsigned long id = *pos;
2445 void *ret;
2446
2447 id = *pos;
2448 id++;
2449 ret = idr_get_next_ul(&clp->cl_stateids, &id);
2450 *pos = id;
2451 return ret;
2452}
2453
2454static void states_stop(struct seq_file *s, void *v)
2455 __releases(&clp->cl_lock)
2456{
2457 struct nfs4_client *clp = s->private;
2458
2459 spin_unlock(&clp->cl_lock);
2460}
2461
2462static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f)
2463{
2464 seq_printf(s, "filename: \"%pD2\"", f->nf_file);
2465}
2466
2467static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f)
2468{
2469 struct inode *inode = f->nf_inode;
2470
2471 seq_printf(s, "superblock: \"%02x:%02x:%ld\"",
2472 MAJOR(inode->i_sb->s_dev),
2473 MINOR(inode->i_sb->s_dev),
2474 inode->i_ino);
2475}
2476
2477static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo)
2478{
2479 seq_printf(s, "owner: ");
2480 seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);
2481}
2482
2483static void nfs4_show_stateid(struct seq_file *s, stateid_t *stid)
2484{
2485 seq_printf(s, "0x%.8x", stid->si_generation);
2486 seq_printf(s, "%12phN", &stid->si_opaque);
2487}
2488
2489static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st)
2490{
2491 struct nfs4_ol_stateid *ols;
2492 struct nfs4_file *nf;
2493 struct nfsd_file *file;
2494 struct nfs4_stateowner *oo;
2495 unsigned int access, deny;
2496
2497 if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)
2498 return 0;
2499 ols = openlockstateid(st);
2500 oo = ols->st_stateowner;
2501 nf = st->sc_file;
2502 file = find_any_file(nf);
2503 if (!file)
2504 return 0;
2505
2506 seq_printf(s, "- ");
2507 nfs4_show_stateid(s, &st->sc_stateid);
2508 seq_printf(s, ": { type: open, ");
2509
2510 access = bmap_to_share_mode(ols->st_access_bmap);
2511 deny = bmap_to_share_mode(ols->st_deny_bmap);
2512
2513 seq_printf(s, "access: %s%s, ",
2514 access & NFS4_SHARE_ACCESS_READ ? "r" : "-",
2515 access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
2516 seq_printf(s, "deny: %s%s, ",
2517 deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",
2518 deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
2519
2520 nfs4_show_superblock(s, file);
2521 seq_printf(s, ", ");
2522 nfs4_show_fname(s, file);
2523 seq_printf(s, ", ");
2524 nfs4_show_owner(s, oo);
2525 seq_printf(s, " }\n");
2526 nfsd_file_put(file);
2527
2528 return 0;
2529}
2530
2531static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st)
2532{
2533 struct nfs4_ol_stateid *ols;
2534 struct nfs4_file *nf;
2535 struct nfsd_file *file;
2536 struct nfs4_stateowner *oo;
2537
2538 ols = openlockstateid(st);
2539 oo = ols->st_stateowner;
2540 nf = st->sc_file;
2541 file = find_any_file(nf);
2542 if (!file)
2543 return 0;
2544
2545 seq_printf(s, "- ");
2546 nfs4_show_stateid(s, &st->sc_stateid);
2547 seq_printf(s, ": { type: lock, ");
2548
2549
2550
2551
2552
2553
2554
2555
2556 nfs4_show_superblock(s, file);
2557
2558 seq_printf(s, ", ");
2559 nfs4_show_fname(s, file);
2560 seq_printf(s, ", ");
2561 nfs4_show_owner(s, oo);
2562 seq_printf(s, " }\n");
2563 nfsd_file_put(file);
2564
2565 return 0;
2566}
2567
2568static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st)
2569{
2570 struct nfs4_delegation *ds;
2571 struct nfs4_file *nf;
2572 struct nfsd_file *file;
2573
2574 ds = delegstateid(st);
2575 nf = st->sc_file;
2576 file = find_deleg_file(nf);
2577 if (!file)
2578 return 0;
2579
2580 seq_printf(s, "- ");
2581 nfs4_show_stateid(s, &st->sc_stateid);
2582 seq_printf(s, ": { type: deleg, ");
2583
2584
2585 seq_printf(s, "access: %s, ",
2586 ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");
2587
2588
2589
2590 nfs4_show_superblock(s, file);
2591 seq_printf(s, ", ");
2592 nfs4_show_fname(s, file);
2593 seq_printf(s, " }\n");
2594 nfsd_file_put(file);
2595
2596 return 0;
2597}
2598
2599static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st)
2600{
2601 struct nfs4_layout_stateid *ls;
2602 struct nfsd_file *file;
2603
2604 ls = container_of(st, struct nfs4_layout_stateid, ls_stid);
2605 file = ls->ls_file;
2606
2607 seq_printf(s, "- ");
2608 nfs4_show_stateid(s, &st->sc_stateid);
2609 seq_printf(s, ": { type: layout, ");
2610
2611
2612
2613 nfs4_show_superblock(s, file);
2614 seq_printf(s, ", ");
2615 nfs4_show_fname(s, file);
2616 seq_printf(s, " }\n");
2617
2618 return 0;
2619}
2620
2621static int states_show(struct seq_file *s, void *v)
2622{
2623 struct nfs4_stid *st = v;
2624
2625 switch (st->sc_type) {
2626 case NFS4_OPEN_STID:
2627 return nfs4_show_open(s, st);
2628 case NFS4_LOCK_STID:
2629 return nfs4_show_lock(s, st);
2630 case NFS4_DELEG_STID:
2631 return nfs4_show_deleg(s, st);
2632 case NFS4_LAYOUT_STID:
2633 return nfs4_show_layout(s, st);
2634 default:
2635 return 0;
2636 }
2637
2638}
2639
2640static struct seq_operations states_seq_ops = {
2641 .start = states_start,
2642 .next = states_next,
2643 .stop = states_stop,
2644 .show = states_show
2645};
2646
2647static int client_states_open(struct inode *inode, struct file *file)
2648{
2649 struct seq_file *s;
2650 struct nfs4_client *clp;
2651 int ret;
2652
2653 clp = get_nfsdfs_clp(inode);
2654 if (!clp)
2655 return -ENXIO;
2656
2657 ret = seq_open(file, &states_seq_ops);
2658 if (ret)
2659 return ret;
2660 s = file->private_data;
2661 s->private = clp;
2662 return 0;
2663}
2664
2665static int client_opens_release(struct inode *inode, struct file *file)
2666{
2667 struct seq_file *m = file->private_data;
2668 struct nfs4_client *clp = m->private;
2669
2670
2671 drop_client(clp);
2672 return 0;
2673}
2674
2675static const struct file_operations client_states_fops = {
2676 .open = client_states_open,
2677 .read = seq_read,
2678 .llseek = seq_lseek,
2679 .release = client_opens_release,
2680};
2681
2682
2683
2684
2685
2686
2687
2688static void force_expire_client(struct nfs4_client *clp)
2689{
2690 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2691 bool already_expired;
2692
2693 trace_nfsd_clid_admin_expired(&clp->cl_clientid);
2694
2695 spin_lock(&nn->client_lock);
2696 clp->cl_time = 0;
2697 spin_unlock(&nn->client_lock);
2698
2699 wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);
2700 spin_lock(&nn->client_lock);
2701 already_expired = list_empty(&clp->cl_lru);
2702 if (!already_expired)
2703 unhash_client_locked(clp);
2704 spin_unlock(&nn->client_lock);
2705
2706 if (!already_expired)
2707 expire_client(clp);
2708 else
2709 wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);
2710}
2711
2712static ssize_t client_ctl_write(struct file *file, const char __user *buf,
2713 size_t size, loff_t *pos)
2714{
2715 char *data;
2716 struct nfs4_client *clp;
2717
2718 data = simple_transaction_get(file, buf, size);
2719 if (IS_ERR(data))
2720 return PTR_ERR(data);
2721 if (size != 7 || 0 != memcmp(data, "expire\n", 7))
2722 return -EINVAL;
2723 clp = get_nfsdfs_clp(file_inode(file));
2724 if (!clp)
2725 return -ENXIO;
2726 force_expire_client(clp);
2727 drop_client(clp);
2728 return 7;
2729}
2730
2731static const struct file_operations client_ctl_fops = {
2732 .write = client_ctl_write,
2733 .release = simple_transaction_release,
2734};
2735
2736static const struct tree_descr client_files[] = {
2737 [0] = {"info", &client_info_fops, S_IRUSR},
2738 [1] = {"states", &client_states_fops, S_IRUSR},
2739 [2] = {"ctl", &client_ctl_fops, S_IWUSR},
2740 [3] = {""},
2741};
2742
2743static struct nfs4_client *create_client(struct xdr_netobj name,
2744 struct svc_rqst *rqstp, nfs4_verifier *verf)
2745{
2746 struct nfs4_client *clp;
2747 struct sockaddr *sa = svc_addr(rqstp);
2748 int ret;
2749 struct net *net = SVC_NET(rqstp);
2750 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2751 struct dentry *dentries[ARRAY_SIZE(client_files)];
2752
2753 clp = alloc_client(name);
2754 if (clp == NULL)
2755 return NULL;
2756
2757 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
2758 if (ret) {
2759 free_client(clp);
2760 return NULL;
2761 }
2762 gen_clid(clp, nn);
2763 kref_init(&clp->cl_nfsdfs.cl_ref);
2764 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
2765 clp->cl_time = ktime_get_boottime_seconds();
2766 clear_bit(0, &clp->cl_cb_slot_busy);
2767 copy_verf(clp, verf);
2768 memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
2769 clp->cl_cb_session = NULL;
2770 clp->net = net;
2771 clp->cl_nfsd_dentry = nfsd_client_mkdir(
2772 nn, &clp->cl_nfsdfs,
2773 clp->cl_clientid.cl_id - nn->clientid_base,
2774 client_files, dentries);
2775 clp->cl_nfsd_info_dentry = dentries[0];
2776 if (!clp->cl_nfsd_dentry) {
2777 free_client(clp);
2778 return NULL;
2779 }
2780 return clp;
2781}
2782
2783static void
2784add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
2785{
2786 struct rb_node **new = &(root->rb_node), *parent = NULL;
2787 struct nfs4_client *clp;
2788
2789 while (*new) {
2790 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
2791 parent = *new;
2792
2793 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
2794 new = &((*new)->rb_left);
2795 else
2796 new = &((*new)->rb_right);
2797 }
2798
2799 rb_link_node(&new_clp->cl_namenode, parent, new);
2800 rb_insert_color(&new_clp->cl_namenode, root);
2801}
2802
2803static struct nfs4_client *
2804find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
2805{
2806 int cmp;
2807 struct rb_node *node = root->rb_node;
2808 struct nfs4_client *clp;
2809
2810 while (node) {
2811 clp = rb_entry(node, struct nfs4_client, cl_namenode);
2812 cmp = compare_blob(&clp->cl_name, name);
2813 if (cmp > 0)
2814 node = node->rb_left;
2815 else if (cmp < 0)
2816 node = node->rb_right;
2817 else
2818 return clp;
2819 }
2820 return NULL;
2821}
2822
2823static void
2824add_to_unconfirmed(struct nfs4_client *clp)
2825{
2826 unsigned int idhashval;
2827 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2828
2829 lockdep_assert_held(&nn->client_lock);
2830
2831 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2832 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
2833 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2834 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
2835 renew_client_locked(clp);
2836}
2837
2838static void
2839move_to_confirmed(struct nfs4_client *clp)
2840{
2841 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2842 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2843
2844 lockdep_assert_held(&nn->client_lock);
2845
2846 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
2847 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
2848 add_clp_to_name_tree(clp, &nn->conf_name_tree);
2849 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2850 trace_nfsd_clid_confirmed(&clp->cl_clientid);
2851 renew_client_locked(clp);
2852}
2853
2854static struct nfs4_client *
2855find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
2856{
2857 struct nfs4_client *clp;
2858 unsigned int idhashval = clientid_hashval(clid->cl_id);
2859
2860 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
2861 if (same_clid(&clp->cl_clientid, clid)) {
2862 if ((bool)clp->cl_minorversion != sessions)
2863 return NULL;
2864 renew_client_locked(clp);
2865 return clp;
2866 }
2867 }
2868 return NULL;
2869}
2870
2871static struct nfs4_client *
2872find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2873{
2874 struct list_head *tbl = nn->conf_id_hashtbl;
2875
2876 lockdep_assert_held(&nn->client_lock);
2877 return find_client_in_id_table(tbl, clid, sessions);
2878}
2879
2880static struct nfs4_client *
2881find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2882{
2883 struct list_head *tbl = nn->unconf_id_hashtbl;
2884
2885 lockdep_assert_held(&nn->client_lock);
2886 return find_client_in_id_table(tbl, clid, sessions);
2887}
2888
2889static bool clp_used_exchangeid(struct nfs4_client *clp)
2890{
2891 return clp->cl_exchange_flags != 0;
2892}
2893
2894static struct nfs4_client *
2895find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2896{
2897 lockdep_assert_held(&nn->client_lock);
2898 return find_clp_in_name_tree(name, &nn->conf_name_tree);
2899}
2900
2901static struct nfs4_client *
2902find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2903{
2904 lockdep_assert_held(&nn->client_lock);
2905 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
2906}
2907
2908static void
2909gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
2910{
2911 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
2912 struct sockaddr *sa = svc_addr(rqstp);
2913 u32 scopeid = rpc_get_scope_id(sa);
2914 unsigned short expected_family;
2915
2916
2917 if (se->se_callback_netid_len == 3 &&
2918 !memcmp(se->se_callback_netid_val, "tcp", 3))
2919 expected_family = AF_INET;
2920 else if (se->se_callback_netid_len == 4 &&
2921 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2922 expected_family = AF_INET6;
2923 else
2924 goto out_err;
2925
2926 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
2927 se->se_callback_addr_len,
2928 (struct sockaddr *)&conn->cb_addr,
2929 sizeof(conn->cb_addr));
2930
2931 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
2932 goto out_err;
2933
2934 if (conn->cb_addr.ss_family == AF_INET6)
2935 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
2936
2937 conn->cb_prog = se->se_callback_prog;
2938 conn->cb_ident = se->se_callback_ident;
2939 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
2940 trace_nfsd_cb_args(clp, conn);
2941 return;
2942out_err:
2943 conn->cb_addr.ss_family = AF_UNSPEC;
2944 conn->cb_addrlen = 0;
2945 trace_nfsd_cb_nodelegs(clp);
2946 return;
2947}
2948
2949
2950
2951
2952static void
2953nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2954{
2955 struct xdr_buf *buf = resp->xdr->buf;
2956 struct nfsd4_slot *slot = resp->cstate.slot;
2957 unsigned int base;
2958
2959 dprintk("--> %s slot %p\n", __func__, slot);
2960
2961 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
2962 slot->sl_opcnt = resp->opcnt;
2963 slot->sl_status = resp->cstate.status;
2964 free_svc_cred(&slot->sl_cred);
2965 copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);
2966
2967 if (!nfsd4_cache_this(resp)) {
2968 slot->sl_flags &= ~NFSD4_SLOT_CACHED;
2969 return;
2970 }
2971 slot->sl_flags |= NFSD4_SLOT_CACHED;
2972
2973 base = resp->cstate.data_offset;
2974 slot->sl_datalen = buf->len - base;
2975 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
2976 WARN(1, "%s: sessions DRC could not cache compound\n",
2977 __func__);
2978 return;
2979}
2980
2981
2982
2983
2984
2985
2986
2987
2988static __be32
2989nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2990 struct nfsd4_compoundres *resp)
2991{
2992 struct nfsd4_op *op;
2993 struct nfsd4_slot *slot = resp->cstate.slot;
2994
2995
2996 op = &args->ops[resp->opcnt - 1];
2997 nfsd4_encode_operation(resp, op);
2998
2999 if (slot->sl_flags & NFSD4_SLOT_CACHED)
3000 return op->status;
3001 if (args->opcnt == 1) {
3002
3003
3004
3005
3006
3007 op->status = nfserr_seq_false_retry;
3008 } else {
3009 op = &args->ops[resp->opcnt++];
3010 op->status = nfserr_retry_uncached_rep;
3011 nfsd4_encode_operation(resp, op);
3012 }
3013 return op->status;
3014}
3015
3016
3017
3018
3019
3020static __be32
3021nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
3022 struct nfsd4_sequence *seq)
3023{
3024 struct nfsd4_slot *slot = resp->cstate.slot;
3025 struct xdr_stream *xdr = resp->xdr;
3026 __be32 *p;
3027 __be32 status;
3028
3029 dprintk("--> %s slot %p\n", __func__, slot);
3030
3031 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
3032 if (status)
3033 return status;
3034
3035 p = xdr_reserve_space(xdr, slot->sl_datalen);
3036 if (!p) {
3037 WARN_ON_ONCE(1);
3038 return nfserr_serverfault;
3039 }
3040 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
3041 xdr_commit_encode(xdr);
3042
3043 resp->opcnt = slot->sl_opcnt;
3044 return slot->sl_status;
3045}
3046
3047
3048
3049
3050static void
3051nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
3052{
3053#ifdef CONFIG_NFSD_PNFS
3054 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
3055#else
3056 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
3057#endif
3058
3059
3060 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
3061
3062
3063 clid->flags = new->cl_exchange_flags;
3064}
3065
3066static bool client_has_openowners(struct nfs4_client *clp)
3067{
3068 struct nfs4_openowner *oo;
3069
3070 list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
3071 if (!list_empty(&oo->oo_owner.so_stateids))
3072 return true;
3073 }
3074 return false;
3075}
3076
3077static bool client_has_state(struct nfs4_client *clp)
3078{
3079 return client_has_openowners(clp)
3080#ifdef CONFIG_NFSD_PNFS
3081 || !list_empty(&clp->cl_lo_states)
3082#endif
3083 || !list_empty(&clp->cl_delegations)
3084 || !list_empty(&clp->cl_sessions)
3085 || !list_empty(&clp->async_copies);
3086}
3087
3088static __be32 copy_impl_id(struct nfs4_client *clp,
3089 struct nfsd4_exchange_id *exid)
3090{
3091 if (!exid->nii_domain.data)
3092 return 0;
3093 xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);
3094 if (!clp->cl_nii_domain.data)
3095 return nfserr_jukebox;
3096 xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);
3097 if (!clp->cl_nii_name.data)
3098 return nfserr_jukebox;
3099 clp->cl_nii_time = exid->nii_time;
3100 return 0;
3101}
3102
3103__be32
3104nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3105 union nfsd4_op_u *u)
3106{
3107 struct nfsd4_exchange_id *exid = &u->exchange_id;
3108 struct nfs4_client *conf, *new;
3109 struct nfs4_client *unconf = NULL;
3110 __be32 status;
3111 char addr_str[INET6_ADDRSTRLEN];
3112 nfs4_verifier verf = exid->verifier;
3113 struct sockaddr *sa = svc_addr(rqstp);
3114 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
3115 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3116
3117 rpc_ntop(sa, addr_str, sizeof(addr_str));
3118 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
3119 "ip_addr=%s flags %x, spa_how %u\n",
3120 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
3121 addr_str, exid->flags, exid->spa_how);
3122
3123 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
3124 return nfserr_inval;
3125
3126 new = create_client(exid->clname, rqstp, &verf);
3127 if (new == NULL)
3128 return nfserr_jukebox;
3129 status = copy_impl_id(new, exid);
3130 if (status)
3131 goto out_nolock;
3132
3133 switch (exid->spa_how) {
3134 case SP4_MACH_CRED:
3135 exid->spo_must_enforce[0] = 0;
3136 exid->spo_must_enforce[1] = (
3137 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3138 1 << (OP_EXCHANGE_ID - 32) |
3139 1 << (OP_CREATE_SESSION - 32) |
3140 1 << (OP_DESTROY_SESSION - 32) |
3141 1 << (OP_DESTROY_CLIENTID - 32));
3142
3143 exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |
3144 1 << (OP_OPEN_DOWNGRADE) |
3145 1 << (OP_LOCKU) |
3146 1 << (OP_DELEGRETURN));
3147
3148 exid->spo_must_allow[1] &= (
3149 1 << (OP_TEST_STATEID - 32) |
3150 1 << (OP_FREE_STATEID - 32));
3151 if (!svc_rqst_integrity_protected(rqstp)) {
3152 status = nfserr_inval;
3153 goto out_nolock;
3154 }
3155
3156
3157
3158
3159
3160 if (!new->cl_cred.cr_principal &&
3161 !new->cl_cred.cr_raw_principal) {
3162 status = nfserr_serverfault;
3163 goto out_nolock;
3164 }
3165 new->cl_mach_cred = true;
3166 break;
3167 case SP4_NONE:
3168 break;
3169 default:
3170 WARN_ON_ONCE(1);
3171 fallthrough;
3172 case SP4_SSV:
3173 status = nfserr_encr_alg_unsupp;
3174 goto out_nolock;
3175 }
3176
3177
3178 spin_lock(&nn->client_lock);
3179 conf = find_confirmed_client_by_name(&exid->clname, nn);
3180 if (conf) {
3181 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
3182 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
3183
3184 if (update) {
3185 if (!clp_used_exchangeid(conf)) {
3186 status = nfserr_inval;
3187 goto out;
3188 }
3189 if (!nfsd4_mach_creds_match(conf, rqstp)) {
3190 status = nfserr_wrong_cred;
3191 goto out;
3192 }
3193 if (!creds_match) {
3194 status = nfserr_perm;
3195 goto out;
3196 }
3197 if (!verfs_match) {
3198 status = nfserr_not_same;
3199 goto out;
3200 }
3201
3202 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
3203 trace_nfsd_clid_confirmed_r(conf);
3204 goto out_copy;
3205 }
3206 if (!creds_match) {
3207 if (client_has_state(conf)) {
3208 status = nfserr_clid_inuse;
3209 trace_nfsd_clid_cred_mismatch(conf, rqstp);
3210 goto out;
3211 }
3212 goto out_new;
3213 }
3214 if (verfs_match) {
3215 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
3216 trace_nfsd_clid_confirmed_r(conf);
3217 goto out_copy;
3218 }
3219
3220 trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf);
3221 conf = NULL;
3222 goto out_new;
3223 }
3224
3225 if (update) {
3226 status = nfserr_noent;
3227 goto out;
3228 }
3229
3230 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
3231 if (unconf)
3232 unhash_client_locked(unconf);
3233
3234
3235 trace_nfsd_clid_fresh(new);
3236
3237out_new:
3238 if (conf) {
3239 status = mark_client_expired_locked(conf);
3240 if (status)
3241 goto out;
3242 trace_nfsd_clid_replaced(&conf->cl_clientid);
3243 }
3244 new->cl_minorversion = cstate->minorversion;
3245 new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
3246 new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
3247
3248 add_to_unconfirmed(new);
3249 swap(new, conf);
3250out_copy:
3251 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
3252 exid->clientid.cl_id = conf->cl_clientid.cl_id;
3253
3254 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
3255 nfsd4_set_ex_flags(conf, exid);
3256
3257 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
3258 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
3259 status = nfs_ok;
3260
3261out:
3262 spin_unlock(&nn->client_lock);
3263out_nolock:
3264 if (new)
3265 expire_client(new);
3266 if (unconf) {
3267 trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
3268 expire_client(unconf);
3269 }
3270 return status;
3271}
3272
3273static __be32
3274check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
3275{
3276 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
3277 slot_seqid);
3278
3279
3280 if (slot_inuse) {
3281 if (seqid == slot_seqid)
3282 return nfserr_jukebox;
3283 else
3284 return nfserr_seq_misordered;
3285 }
3286
3287 if (likely(seqid == slot_seqid + 1))
3288 return nfs_ok;
3289 if (seqid == slot_seqid)
3290 return nfserr_replay_cache;
3291 return nfserr_seq_misordered;
3292}
3293
3294
3295
3296
3297
3298
3299static void
3300nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
3301 struct nfsd4_clid_slot *slot, __be32 nfserr)
3302{
3303 slot->sl_status = nfserr;
3304 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
3305}
3306
3307static __be32
3308nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
3309 struct nfsd4_clid_slot *slot)
3310{
3311 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
3312 return slot->sl_status;
3313}
3314
3315#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
3316 2 * 2 + \
3317 1 + \
3318 3 + \
3319 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
3320 \
3321 4 ) * sizeof(__be32))
3322
3323#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
3324 2 + \
3325 1 + \
3326 1 + \
3327 3 + \
3328 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
3329 \
3330 5 ) * sizeof(__be32))
3331
3332static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
3333{
3334 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
3335
3336 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
3337 return nfserr_toosmall;
3338 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
3339 return nfserr_toosmall;
3340 ca->headerpadsz = 0;
3341 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
3342 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
3343 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
3344 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
3345 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
3346 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357 ca->maxreqs = nfsd4_get_drc_mem(ca, nn);
3358
3359 return nfs_ok;
3360}
3361
3362
3363
3364
3365
3366#define RPC_MAX_HEADER_WITH_AUTH_SYS \
3367 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
3368
3369#define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
3370 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
3371
3372#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
3373 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
3374#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
3375 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
3376 sizeof(__be32))
3377
3378static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
3379{
3380 ca->headerpadsz = 0;
3381
3382 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
3383 return nfserr_toosmall;
3384 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
3385 return nfserr_toosmall;
3386 ca->maxresp_cached = 0;
3387 if (ca->maxops < 2)
3388 return nfserr_toosmall;
3389
3390 return nfs_ok;
3391}
3392
3393static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
3394{
3395 switch (cbs->flavor) {
3396 case RPC_AUTH_NULL:
3397 case RPC_AUTH_UNIX:
3398 return nfs_ok;
3399 default:
3400
3401
3402
3403
3404
3405
3406
3407 return nfserr_encr_alg_unsupp;
3408 }
3409}
3410
3411__be32
3412nfsd4_create_session(struct svc_rqst *rqstp,
3413 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
3414{
3415 struct nfsd4_create_session *cr_ses = &u->create_session;
3416 struct sockaddr *sa = svc_addr(rqstp);
3417 struct nfs4_client *conf, *unconf;
3418 struct nfs4_client *old = NULL;
3419 struct nfsd4_session *new;
3420 struct nfsd4_conn *conn;
3421 struct nfsd4_clid_slot *cs_slot = NULL;
3422 __be32 status = 0;
3423 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3424
3425 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
3426 return nfserr_inval;
3427 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
3428 if (status)
3429 return status;
3430 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
3431 if (status)
3432 return status;
3433 status = check_backchannel_attrs(&cr_ses->back_channel);
3434 if (status)
3435 goto out_release_drc_mem;
3436 status = nfserr_jukebox;
3437 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
3438 if (!new)
3439 goto out_release_drc_mem;
3440 conn = alloc_conn_from_crses(rqstp, cr_ses);
3441 if (!conn)
3442 goto out_free_session;
3443
3444 spin_lock(&nn->client_lock);
3445 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
3446 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
3447 WARN_ON_ONCE(conf && unconf);
3448
3449 if (conf) {
3450 status = nfserr_wrong_cred;
3451 if (!nfsd4_mach_creds_match(conf, rqstp))
3452 goto out_free_conn;
3453 cs_slot = &conf->cl_cs_slot;
3454 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
3455 if (status) {
3456 if (status == nfserr_replay_cache)
3457 status = nfsd4_replay_create_session(cr_ses, cs_slot);
3458 goto out_free_conn;
3459 }
3460 } else if (unconf) {
3461 status = nfserr_clid_inuse;
3462 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
3463 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
3464 trace_nfsd_clid_cred_mismatch(unconf, rqstp);
3465 goto out_free_conn;
3466 }
3467 status = nfserr_wrong_cred;
3468 if (!nfsd4_mach_creds_match(unconf, rqstp))
3469 goto out_free_conn;
3470 cs_slot = &unconf->cl_cs_slot;
3471 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
3472 if (status) {
3473
3474 status = nfserr_seq_misordered;
3475 goto out_free_conn;
3476 }
3477 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3478 if (old) {
3479 status = mark_client_expired_locked(old);
3480 if (status) {
3481 old = NULL;
3482 goto out_free_conn;
3483 }
3484 trace_nfsd_clid_replaced(&old->cl_clientid);
3485 }
3486 move_to_confirmed(unconf);
3487 conf = unconf;
3488 } else {
3489 status = nfserr_stale_clientid;
3490 goto out_free_conn;
3491 }
3492 status = nfs_ok;
3493
3494 cr_ses->flags &= ~SESSION4_PERSIST;
3495
3496 cr_ses->flags &= ~SESSION4_RDMA;
3497
3498 init_session(rqstp, new, conf, cr_ses);
3499 nfsd4_get_session_locked(new);
3500
3501 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
3502 NFS4_MAX_SESSIONID_LEN);
3503 cs_slot->sl_seqid++;
3504 cr_ses->seqid = cs_slot->sl_seqid;
3505
3506
3507 nfsd4_cache_create_session(cr_ses, cs_slot, status);
3508 spin_unlock(&nn->client_lock);
3509 if (conf == unconf)
3510 fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);
3511
3512 nfsd4_init_conn(rqstp, conn, new);
3513 nfsd4_put_session(new);
3514 if (old)
3515 expire_client(old);
3516 return status;
3517out_free_conn:
3518 spin_unlock(&nn->client_lock);
3519 free_conn(conn);
3520 if (old)
3521 expire_client(old);
3522out_free_session:
3523 __free_session(new);
3524out_release_drc_mem:
3525 nfsd4_put_drc_mem(&cr_ses->fore_channel);
3526 return status;
3527}
3528
3529static __be32 nfsd4_map_bcts_dir(u32 *dir)
3530{
3531 switch (*dir) {
3532 case NFS4_CDFC4_FORE:
3533 case NFS4_CDFC4_BACK:
3534 return nfs_ok;
3535 case NFS4_CDFC4_FORE_OR_BOTH:
3536 case NFS4_CDFC4_BACK_OR_BOTH:
3537 *dir = NFS4_CDFC4_BOTH;
3538 return nfs_ok;
3539 }
3540 return nfserr_inval;
3541}
3542
3543__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp,
3544 struct nfsd4_compound_state *cstate,
3545 union nfsd4_op_u *u)
3546{
3547 struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
3548 struct nfsd4_session *session = cstate->session;
3549 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3550 __be32 status;
3551
3552 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
3553 if (status)
3554 return status;
3555 spin_lock(&nn->client_lock);
3556 session->se_cb_prog = bc->bc_cb_program;
3557 session->se_cb_sec = bc->bc_cb_sec;
3558 spin_unlock(&nn->client_lock);
3559
3560 nfsd4_probe_callback(session->se_client);
3561
3562 return nfs_ok;
3563}
3564
3565static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
3566{
3567 struct nfsd4_conn *c;
3568
3569 list_for_each_entry(c, &s->se_conns, cn_persession) {
3570 if (c->cn_xprt == xpt) {
3571 return c;
3572 }
3573 }
3574 return NULL;
3575}
3576
3577static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst,
3578 struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn)
3579{
3580 struct nfs4_client *clp = session->se_client;
3581 struct svc_xprt *xpt = rqst->rq_xprt;
3582 struct nfsd4_conn *c;
3583 __be32 status;
3584
3585
3586 spin_lock(&clp->cl_lock);
3587 c = __nfsd4_find_conn(xpt, session);
3588 if (!c)
3589 status = nfserr_noent;
3590 else if (req == c->cn_flags)
3591 status = nfs_ok;
3592 else if (req == NFS4_CDFC4_FORE_OR_BOTH &&
3593 c->cn_flags != NFS4_CDFC4_BACK)
3594 status = nfs_ok;
3595 else if (req == NFS4_CDFC4_BACK_OR_BOTH &&
3596 c->cn_flags != NFS4_CDFC4_FORE)
3597 status = nfs_ok;
3598 else
3599 status = nfserr_inval;
3600 spin_unlock(&clp->cl_lock);
3601 if (status == nfs_ok && conn)
3602 *conn = c;
3603 return status;
3604}
3605
3606__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
3607 struct nfsd4_compound_state *cstate,
3608 union nfsd4_op_u *u)
3609{
3610 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
3611 __be32 status;
3612 struct nfsd4_conn *conn;
3613 struct nfsd4_session *session;
3614 struct net *net = SVC_NET(rqstp);
3615 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3616
3617 if (!nfsd4_last_compound_op(rqstp))
3618 return nfserr_not_only_op;
3619 spin_lock(&nn->client_lock);
3620 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
3621 spin_unlock(&nn->client_lock);
3622 if (!session)
3623 goto out_no_session;
3624 status = nfserr_wrong_cred;
3625 if (!nfsd4_mach_creds_match(session->se_client, rqstp))
3626 goto out;
3627 status = nfsd4_match_existing_connection(rqstp, session,
3628 bcts->dir, &conn);
3629 if (status == nfs_ok) {
3630 if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH ||
3631 bcts->dir == NFS4_CDFC4_BACK)
3632 conn->cn_flags |= NFS4_CDFC4_BACK;
3633 nfsd4_probe_callback(session->se_client);
3634 goto out;
3635 }
3636 if (status == nfserr_inval)
3637 goto out;
3638 status = nfsd4_map_bcts_dir(&bcts->dir);
3639 if (status)
3640 goto out;
3641 conn = alloc_conn(rqstp, bcts->dir);
3642 status = nfserr_jukebox;
3643 if (!conn)
3644 goto out;
3645 nfsd4_init_conn(rqstp, conn, session);
3646 status = nfs_ok;
3647out:
3648 nfsd4_put_session(session);
3649out_no_session:
3650 return status;
3651}
3652
3653static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid)
3654{
3655 if (!cstate->session)
3656 return false;
3657 return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid));
3658}
3659
3660__be32
3661nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate,
3662 union nfsd4_op_u *u)
3663{
3664 struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid;
3665 struct nfsd4_session *ses;
3666 __be32 status;
3667 int ref_held_by_me = 0;
3668 struct net *net = SVC_NET(r);
3669 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3670
3671 status = nfserr_not_only_op;
3672 if (nfsd4_compound_in_session(cstate, sessionid)) {
3673 if (!nfsd4_last_compound_op(r))
3674 goto out;
3675 ref_held_by_me++;
3676 }
3677 dump_sessionid(__func__, sessionid);
3678 spin_lock(&nn->client_lock);
3679 ses = find_in_sessionid_hashtbl(sessionid, net, &status);
3680 if (!ses)
3681 goto out_client_lock;
3682 status = nfserr_wrong_cred;
3683 if (!nfsd4_mach_creds_match(ses->se_client, r))
3684 goto out_put_session;
3685 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
3686 if (status)
3687 goto out_put_session;
3688 unhash_session(ses);
3689 spin_unlock(&nn->client_lock);
3690
3691 nfsd4_probe_callback_sync(ses->se_client);
3692
3693 spin_lock(&nn->client_lock);
3694 status = nfs_ok;
3695out_put_session:
3696 nfsd4_put_session_locked(ses);
3697out_client_lock:
3698 spin_unlock(&nn->client_lock);
3699out:
3700 return status;
3701}
3702
3703static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
3704{
3705 struct nfs4_client *clp = ses->se_client;
3706 struct nfsd4_conn *c;
3707 __be32 status = nfs_ok;
3708 int ret;
3709
3710 spin_lock(&clp->cl_lock);
3711 c = __nfsd4_find_conn(new->cn_xprt, ses);
3712 if (c)
3713 goto out_free;
3714 status = nfserr_conn_not_bound_to_session;
3715 if (clp->cl_mach_cred)
3716 goto out_free;
3717 __nfsd4_hash_conn(new, ses);
3718 spin_unlock(&clp->cl_lock);
3719 ret = nfsd4_register_conn(new);
3720 if (ret)
3721
3722 nfsd4_conn_lost(&new->cn_xpt_user);
3723 return nfs_ok;
3724out_free:
3725 spin_unlock(&clp->cl_lock);
3726 free_conn(new);
3727 return status;
3728}
3729
3730static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
3731{
3732 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3733
3734 return args->opcnt > session->se_fchannel.maxops;
3735}
3736
3737static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
3738 struct nfsd4_session *session)
3739{
3740 struct xdr_buf *xb = &rqstp->rq_arg;
3741
3742 return xb->len > session->se_fchannel.maxreq_sz;
3743}
3744
3745static bool replay_matches_cache(struct svc_rqst *rqstp,
3746 struct nfsd4_sequence *seq, struct nfsd4_slot *slot)
3747{
3748 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3749
3750 if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=
3751 (bool)seq->cachethis)
3752 return false;
3753
3754
3755
3756
3757 if (slot->sl_opcnt < argp->opcnt && !slot->sl_status)
3758 return false;
3759
3760
3761
3762
3763
3764 if (slot->sl_opcnt > argp->opcnt)
3765 return false;
3766
3767 if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))
3768 return false;
3769
3770
3771
3772
3773
3774
3775 return true;
3776}
3777
3778__be32
3779nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3780 union nfsd4_op_u *u)
3781{
3782 struct nfsd4_sequence *seq = &u->sequence;
3783 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3784 struct xdr_stream *xdr = resp->xdr;
3785 struct nfsd4_session *session;
3786 struct nfs4_client *clp;
3787 struct nfsd4_slot *slot;
3788 struct nfsd4_conn *conn;
3789 __be32 status;
3790 int buflen;
3791 struct net *net = SVC_NET(rqstp);
3792 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3793
3794 if (resp->opcnt != 1)
3795 return nfserr_sequence_pos;
3796
3797
3798
3799
3800
3801 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
3802 if (!conn)
3803 return nfserr_jukebox;
3804
3805 spin_lock(&nn->client_lock);
3806 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
3807 if (!session)
3808 goto out_no_session;
3809 clp = session->se_client;
3810
3811 status = nfserr_too_many_ops;
3812 if (nfsd4_session_too_many_ops(rqstp, session))
3813 goto out_put_session;
3814
3815 status = nfserr_req_too_big;
3816 if (nfsd4_request_too_big(rqstp, session))
3817 goto out_put_session;
3818
3819 status = nfserr_badslot;
3820 if (seq->slotid >= session->se_fchannel.maxreqs)
3821 goto out_put_session;
3822
3823 slot = session->se_slots[seq->slotid];
3824 dprintk("%s: slotid %d\n", __func__, seq->slotid);
3825
3826
3827
3828
3829 seq->maxslots = session->se_fchannel.maxreqs;
3830
3831 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
3832 slot->sl_flags & NFSD4_SLOT_INUSE);
3833 if (status == nfserr_replay_cache) {
3834 status = nfserr_seq_misordered;
3835 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
3836 goto out_put_session;
3837 status = nfserr_seq_false_retry;
3838 if (!replay_matches_cache(rqstp, seq, slot))
3839 goto out_put_session;
3840 cstate->slot = slot;
3841 cstate->session = session;
3842 cstate->clp = clp;
3843
3844
3845 status = nfsd4_replay_cache_entry(resp, seq);
3846 cstate->status = nfserr_replay_cache;
3847 goto out;
3848 }
3849 if (status)
3850 goto out_put_session;
3851
3852 status = nfsd4_sequence_check_conn(conn, session);
3853 conn = NULL;
3854 if (status)
3855 goto out_put_session;
3856
3857 buflen = (seq->cachethis) ?
3858 session->se_fchannel.maxresp_cached :
3859 session->se_fchannel.maxresp_sz;
3860 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
3861 nfserr_rep_too_big;
3862 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
3863 goto out_put_session;
3864 svc_reserve(rqstp, buflen);
3865
3866 status = nfs_ok;
3867
3868 slot->sl_seqid = seq->seqid;
3869 slot->sl_flags |= NFSD4_SLOT_INUSE;
3870 if (seq->cachethis)
3871 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
3872 else
3873 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
3874
3875 cstate->slot = slot;
3876 cstate->session = session;
3877 cstate->clp = clp;
3878
3879out:
3880 switch (clp->cl_cb_state) {
3881 case NFSD4_CB_DOWN:
3882 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
3883 break;
3884 case NFSD4_CB_FAULT:
3885 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
3886 break;
3887 default:
3888 seq->status_flags = 0;
3889 }
3890 if (!list_empty(&clp->cl_revoked))
3891 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
3892out_no_session:
3893 if (conn)
3894 free_conn(conn);
3895 spin_unlock(&nn->client_lock);
3896 return status;
3897out_put_session:
3898 nfsd4_put_session_locked(session);
3899 goto out_no_session;
3900}
3901
3902void
3903nfsd4_sequence_done(struct nfsd4_compoundres *resp)
3904{
3905 struct nfsd4_compound_state *cs = &resp->cstate;
3906
3907 if (nfsd4_has_session(cs)) {
3908 if (cs->status != nfserr_replay_cache) {
3909 nfsd4_store_cache_entry(resp);
3910 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3911 }
3912
3913 nfsd4_put_session(cs->session);
3914 } else if (cs->clp)
3915 put_client_renew(cs->clp);
3916}
3917
3918__be32
3919nfsd4_destroy_clientid(struct svc_rqst *rqstp,
3920 struct nfsd4_compound_state *cstate,
3921 union nfsd4_op_u *u)
3922{
3923 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
3924 struct nfs4_client *conf, *unconf;
3925 struct nfs4_client *clp = NULL;
3926 __be32 status = 0;
3927 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3928
3929 spin_lock(&nn->client_lock);
3930 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
3931 conf = find_confirmed_client(&dc->clientid, true, nn);
3932 WARN_ON_ONCE(conf && unconf);
3933
3934 if (conf) {
3935 if (client_has_state(conf)) {
3936 status = nfserr_clientid_busy;
3937 goto out;
3938 }
3939 status = mark_client_expired_locked(conf);
3940 if (status)
3941 goto out;
3942 clp = conf;
3943 } else if (unconf)
3944 clp = unconf;
3945 else {
3946 status = nfserr_stale_clientid;
3947 goto out;
3948 }
3949 if (!nfsd4_mach_creds_match(clp, rqstp)) {
3950 clp = NULL;
3951 status = nfserr_wrong_cred;
3952 goto out;
3953 }
3954 trace_nfsd_clid_destroyed(&clp->cl_clientid);
3955 unhash_client_locked(clp);
3956out:
3957 spin_unlock(&nn->client_lock);
3958 if (clp)
3959 expire_client(clp);
3960 return status;
3961}
3962
3963__be32
3964nfsd4_reclaim_complete(struct svc_rqst *rqstp,
3965 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
3966{
3967 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
3968 struct nfs4_client *clp = cstate->clp;
3969 __be32 status = 0;
3970
3971 if (rc->rca_one_fs) {
3972 if (!cstate->current_fh.fh_dentry)
3973 return nfserr_nofilehandle;
3974
3975
3976
3977
3978 return nfs_ok;
3979 }
3980
3981 status = nfserr_complete_already;
3982 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))
3983 goto out;
3984
3985 status = nfserr_stale_clientid;
3986 if (is_client_expired(clp))
3987
3988
3989
3990
3991
3992
3993
3994 goto out;
3995
3996 status = nfs_ok;
3997 trace_nfsd_clid_reclaim_complete(&clp->cl_clientid);
3998 nfsd4_client_record_create(clp);
3999 inc_reclaim_complete(clp);
4000out:
4001 return status;
4002}
4003
4004__be32
4005nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4006 union nfsd4_op_u *u)
4007{
4008 struct nfsd4_setclientid *setclid = &u->setclientid;
4009 struct xdr_netobj clname = setclid->se_name;
4010 nfs4_verifier clverifier = setclid->se_verf;
4011 struct nfs4_client *conf, *new;
4012 struct nfs4_client *unconf = NULL;
4013 __be32 status;
4014 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4015
4016 new = create_client(clname, rqstp, &clverifier);
4017 if (new == NULL)
4018 return nfserr_jukebox;
4019 spin_lock(&nn->client_lock);
4020 conf = find_confirmed_client_by_name(&clname, nn);
4021 if (conf && client_has_state(conf)) {
4022 status = nfserr_clid_inuse;
4023 if (clp_used_exchangeid(conf))
4024 goto out;
4025 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
4026 trace_nfsd_clid_cred_mismatch(conf, rqstp);
4027 goto out;
4028 }
4029 }
4030 unconf = find_unconfirmed_client_by_name(&clname, nn);
4031 if (unconf)
4032 unhash_client_locked(unconf);
4033 if (conf) {
4034 if (same_verf(&conf->cl_verifier, &clverifier)) {
4035 copy_clid(new, conf);
4036 gen_confirm(new, nn);
4037 } else
4038 trace_nfsd_clid_verf_mismatch(conf, rqstp,
4039 &clverifier);
4040 } else
4041 trace_nfsd_clid_fresh(new);
4042 new->cl_minorversion = 0;
4043 gen_callback(new, setclid, rqstp);
4044 add_to_unconfirmed(new);
4045 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
4046 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
4047 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
4048 new = NULL;
4049 status = nfs_ok;
4050out:
4051 spin_unlock(&nn->client_lock);
4052 if (new)
4053 free_client(new);
4054 if (unconf) {
4055 trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
4056 expire_client(unconf);
4057 }
4058 return status;
4059}
4060
4061__be32
4062nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
4063 struct nfsd4_compound_state *cstate,
4064 union nfsd4_op_u *u)
4065{
4066 struct nfsd4_setclientid_confirm *setclientid_confirm =
4067 &u->setclientid_confirm;
4068 struct nfs4_client *conf, *unconf;
4069 struct nfs4_client *old = NULL;
4070 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
4071 clientid_t * clid = &setclientid_confirm->sc_clientid;
4072 __be32 status;
4073 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4074
4075 if (STALE_CLIENTID(clid, nn))
4076 return nfserr_stale_clientid;
4077
4078 spin_lock(&nn->client_lock);
4079 conf = find_confirmed_client(clid, false, nn);
4080 unconf = find_unconfirmed_client(clid, false, nn);
4081
4082
4083
4084
4085
4086
4087
4088 status = nfserr_clid_inuse;
4089 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
4090 trace_nfsd_clid_cred_mismatch(unconf, rqstp);
4091 goto out;
4092 }
4093 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
4094 trace_nfsd_clid_cred_mismatch(conf, rqstp);
4095 goto out;
4096 }
4097 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
4098 if (conf && same_verf(&confirm, &conf->cl_confirm)) {
4099 status = nfs_ok;
4100 } else
4101 status = nfserr_stale_clientid;
4102 goto out;
4103 }
4104 status = nfs_ok;
4105 if (conf) {
4106 old = unconf;
4107 unhash_client_locked(old);
4108 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
4109 } else {
4110 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
4111 if (old) {
4112 status = nfserr_clid_inuse;
4113 if (client_has_state(old)
4114 && !same_creds(&unconf->cl_cred,
4115 &old->cl_cred))
4116 goto out;
4117 status = mark_client_expired_locked(old);
4118 if (status) {
4119 old = NULL;
4120 goto out;
4121 }
4122 trace_nfsd_clid_replaced(&old->cl_clientid);
4123 }
4124 move_to_confirmed(unconf);
4125 conf = unconf;
4126 }
4127 get_client_locked(conf);
4128 spin_unlock(&nn->client_lock);
4129 if (conf == unconf)
4130 fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);
4131 nfsd4_probe_callback(conf);
4132 spin_lock(&nn->client_lock);
4133 put_client_renew_locked(conf);
4134out:
4135 spin_unlock(&nn->client_lock);
4136 if (old)
4137 expire_client(old);
4138 return status;
4139}
4140
4141static struct nfs4_file *nfsd4_alloc_file(void)
4142{
4143 return kmem_cache_alloc(file_slab, GFP_KERNEL);
4144}
4145
4146
4147static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval,
4148 struct nfs4_file *fp)
4149{
4150 lockdep_assert_held(&state_lock);
4151
4152 refcount_set(&fp->fi_ref, 1);
4153 spin_lock_init(&fp->fi_lock);
4154 INIT_LIST_HEAD(&fp->fi_stateids);
4155 INIT_LIST_HEAD(&fp->fi_delegations);
4156 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
4157 fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle);
4158 fp->fi_deleg_file = NULL;
4159 fp->fi_had_conflict = false;
4160 fp->fi_share_deny = 0;
4161 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
4162 memset(fp->fi_access, 0, sizeof(fp->fi_access));
4163 fp->fi_aliased = false;
4164 fp->fi_inode = d_inode(fh->fh_dentry);
4165#ifdef CONFIG_NFSD_PNFS
4166 INIT_LIST_HEAD(&fp->fi_lo_states);
4167 atomic_set(&fp->fi_lo_recalls, 0);
4168#endif
4169 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
4170}
4171
4172void
4173nfsd4_free_slabs(void)
4174{
4175 kmem_cache_destroy(client_slab);
4176 kmem_cache_destroy(openowner_slab);
4177 kmem_cache_destroy(lockowner_slab);
4178 kmem_cache_destroy(file_slab);
4179 kmem_cache_destroy(stateid_slab);
4180 kmem_cache_destroy(deleg_slab);
4181 kmem_cache_destroy(odstate_slab);
4182}
4183
4184int
4185nfsd4_init_slabs(void)
4186{
4187 client_slab = kmem_cache_create("nfsd4_clients",
4188 sizeof(struct nfs4_client), 0, 0, NULL);
4189 if (client_slab == NULL)
4190 goto out;
4191 openowner_slab = kmem_cache_create("nfsd4_openowners",
4192 sizeof(struct nfs4_openowner), 0, 0, NULL);
4193 if (openowner_slab == NULL)
4194 goto out_free_client_slab;
4195 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
4196 sizeof(struct nfs4_lockowner), 0, 0, NULL);
4197 if (lockowner_slab == NULL)
4198 goto out_free_openowner_slab;
4199 file_slab = kmem_cache_create("nfsd4_files",
4200 sizeof(struct nfs4_file), 0, 0, NULL);
4201 if (file_slab == NULL)
4202 goto out_free_lockowner_slab;
4203 stateid_slab = kmem_cache_create("nfsd4_stateids",
4204 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
4205 if (stateid_slab == NULL)
4206 goto out_free_file_slab;
4207 deleg_slab = kmem_cache_create("nfsd4_delegations",
4208 sizeof(struct nfs4_delegation), 0, 0, NULL);
4209 if (deleg_slab == NULL)
4210 goto out_free_stateid_slab;
4211 odstate_slab = kmem_cache_create("nfsd4_odstate",
4212 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
4213 if (odstate_slab == NULL)
4214 goto out_free_deleg_slab;
4215 return 0;
4216
4217out_free_deleg_slab:
4218 kmem_cache_destroy(deleg_slab);
4219out_free_stateid_slab:
4220 kmem_cache_destroy(stateid_slab);
4221out_free_file_slab:
4222 kmem_cache_destroy(file_slab);
4223out_free_lockowner_slab:
4224 kmem_cache_destroy(lockowner_slab);
4225out_free_openowner_slab:
4226 kmem_cache_destroy(openowner_slab);
4227out_free_client_slab:
4228 kmem_cache_destroy(client_slab);
4229out:
4230 return -ENOMEM;
4231}
4232
4233static void init_nfs4_replay(struct nfs4_replay *rp)
4234{
4235 rp->rp_status = nfserr_serverfault;
4236 rp->rp_buflen = 0;
4237 rp->rp_buf = rp->rp_ibuf;
4238 mutex_init(&rp->rp_mutex);
4239}
4240
4241static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
4242 struct nfs4_stateowner *so)
4243{
4244 if (!nfsd4_has_session(cstate)) {
4245 mutex_lock(&so->so_replay.rp_mutex);
4246 cstate->replay_owner = nfs4_get_stateowner(so);
4247 }
4248}
4249
4250void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
4251{
4252 struct nfs4_stateowner *so = cstate->replay_owner;
4253
4254 if (so != NULL) {
4255 cstate->replay_owner = NULL;
4256 mutex_unlock(&so->so_replay.rp_mutex);
4257 nfs4_put_stateowner(so);
4258 }
4259}
4260
4261static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
4262{
4263 struct nfs4_stateowner *sop;
4264
4265 sop = kmem_cache_alloc(slab, GFP_KERNEL);
4266 if (!sop)
4267 return NULL;
4268
4269 xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);
4270 if (!sop->so_owner.data) {
4271 kmem_cache_free(slab, sop);
4272 return NULL;
4273 }
4274
4275 INIT_LIST_HEAD(&sop->so_stateids);
4276 sop->so_client = clp;
4277 init_nfs4_replay(&sop->so_replay);
4278 atomic_set(&sop->so_count, 1);
4279 return sop;
4280}
4281
4282static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
4283{
4284 lockdep_assert_held(&clp->cl_lock);
4285
4286 list_add(&oo->oo_owner.so_strhash,
4287 &clp->cl_ownerstr_hashtbl[strhashval]);
4288 list_add(&oo->oo_perclient, &clp->cl_openowners);
4289}
4290
4291static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
4292{
4293 unhash_openowner_locked(openowner(so));
4294}
4295
4296static void nfs4_free_openowner(struct nfs4_stateowner *so)
4297{
4298 struct nfs4_openowner *oo = openowner(so);
4299
4300 kmem_cache_free(openowner_slab, oo);
4301}
4302
4303static const struct nfs4_stateowner_operations openowner_ops = {
4304 .so_unhash = nfs4_unhash_openowner,
4305 .so_free = nfs4_free_openowner,
4306};
4307
4308static struct nfs4_ol_stateid *
4309nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
4310{
4311 struct nfs4_ol_stateid *local, *ret = NULL;
4312 struct nfs4_openowner *oo = open->op_openowner;
4313
4314 lockdep_assert_held(&fp->fi_lock);
4315
4316 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
4317
4318 if (local->st_stateowner->so_is_open_owner == 0)
4319 continue;
4320 if (local->st_stateowner != &oo->oo_owner)
4321 continue;
4322 if (local->st_stid.sc_type == NFS4_OPEN_STID) {
4323 ret = local;
4324 refcount_inc(&ret->st_stid.sc_count);
4325 break;
4326 }
4327 }
4328 return ret;
4329}
4330
4331static __be32
4332nfsd4_verify_open_stid(struct nfs4_stid *s)
4333{
4334 __be32 ret = nfs_ok;
4335
4336 switch (s->sc_type) {
4337 default:
4338 break;
4339 case 0:
4340 case NFS4_CLOSED_STID:
4341 case NFS4_CLOSED_DELEG_STID:
4342 ret = nfserr_bad_stateid;
4343 break;
4344 case NFS4_REVOKED_DELEG_STID:
4345 ret = nfserr_deleg_revoked;
4346 }
4347 return ret;
4348}
4349
4350
4351static __be32
4352nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp)
4353{
4354 __be32 ret;
4355
4356 mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);
4357 ret = nfsd4_verify_open_stid(&stp->st_stid);
4358 if (ret != nfs_ok)
4359 mutex_unlock(&stp->st_mutex);
4360 return ret;
4361}
4362
4363static struct nfs4_ol_stateid *
4364nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
4365{
4366 struct nfs4_ol_stateid *stp;
4367 for (;;) {
4368 spin_lock(&fp->fi_lock);
4369 stp = nfsd4_find_existing_open(fp, open);
4370 spin_unlock(&fp->fi_lock);
4371 if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok)
4372 break;
4373 nfs4_put_stid(&stp->st_stid);
4374 }
4375 return stp;
4376}
4377
4378static struct nfs4_openowner *
4379alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
4380 struct nfsd4_compound_state *cstate)
4381{
4382 struct nfs4_client *clp = cstate->clp;
4383 struct nfs4_openowner *oo, *ret;
4384
4385 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
4386 if (!oo)
4387 return NULL;
4388 oo->oo_owner.so_ops = &openowner_ops;
4389 oo->oo_owner.so_is_open_owner = 1;
4390 oo->oo_owner.so_seqid = open->op_seqid;
4391 oo->oo_flags = 0;
4392 if (nfsd4_has_session(cstate))
4393 oo->oo_flags |= NFS4_OO_CONFIRMED;
4394 oo->oo_time = 0;
4395 oo->oo_last_closed_stid = NULL;
4396 INIT_LIST_HEAD(&oo->oo_close_lru);
4397 spin_lock(&clp->cl_lock);
4398 ret = find_openstateowner_str_locked(strhashval, open, clp);
4399 if (ret == NULL) {
4400 hash_openowner(oo, clp, strhashval);
4401 ret = oo;
4402 } else
4403 nfs4_free_stateowner(&oo->oo_owner);
4404
4405 spin_unlock(&clp->cl_lock);
4406 return ret;
4407}
4408
4409static struct nfs4_ol_stateid *
4410init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
4411{
4412
4413 struct nfs4_openowner *oo = open->op_openowner;
4414 struct nfs4_ol_stateid *retstp = NULL;
4415 struct nfs4_ol_stateid *stp;
4416
4417 stp = open->op_stp;
4418
4419 mutex_init(&stp->st_mutex);
4420 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
4421
4422retry:
4423 spin_lock(&oo->oo_owner.so_client->cl_lock);
4424 spin_lock(&fp->fi_lock);
4425
4426 retstp = nfsd4_find_existing_open(fp, open);
4427 if (retstp)
4428 goto out_unlock;
4429
4430 open->op_stp = NULL;
4431 refcount_inc(&stp->st_stid.sc_count);
4432 stp->st_stid.sc_type = NFS4_OPEN_STID;
4433 INIT_LIST_HEAD(&stp->st_locks);
4434 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
4435 get_nfs4_file(fp);
4436 stp->st_stid.sc_file = fp;
4437 stp->st_access_bmap = 0;
4438 stp->st_deny_bmap = 0;
4439 stp->st_openstp = NULL;
4440 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
4441 list_add(&stp->st_perfile, &fp->fi_stateids);
4442
4443out_unlock:
4444 spin_unlock(&fp->fi_lock);
4445 spin_unlock(&oo->oo_owner.so_client->cl_lock);
4446 if (retstp) {
4447
4448 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
4449 nfs4_put_stid(&retstp->st_stid);
4450 goto retry;
4451 }
4452
4453 mutex_unlock(&stp->st_mutex);
4454 stp = retstp;
4455 }
4456 return stp;
4457}
4458
4459
4460
4461
4462
4463
4464static void
4465move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
4466{
4467 struct nfs4_ol_stateid *last;
4468 struct nfs4_openowner *oo = openowner(s->st_stateowner);
4469 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
4470 nfsd_net_id);
4471
4472 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483 wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);
4484
4485 release_all_access(s);
4486 if (s->st_stid.sc_file) {
4487 put_nfs4_file(s->st_stid.sc_file);
4488 s->st_stid.sc_file = NULL;
4489 }
4490
4491 spin_lock(&nn->client_lock);
4492 last = oo->oo_last_closed_stid;
4493 oo->oo_last_closed_stid = s;
4494 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
4495 oo->oo_time = ktime_get_boottime_seconds();
4496 spin_unlock(&nn->client_lock);
4497 if (last)
4498 nfs4_put_stid(&last->st_stid);
4499}
4500
4501
4502static struct nfs4_file *
4503find_file_locked(struct svc_fh *fh, unsigned int hashval)
4504{
4505 struct nfs4_file *fp;
4506
4507 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
4508 lockdep_is_held(&state_lock)) {
4509 if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
4510 if (refcount_inc_not_zero(&fp->fi_ref))
4511 return fp;
4512 }
4513 }
4514 return NULL;
4515}
4516
4517static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh,
4518 unsigned int hashval)
4519{
4520 struct nfs4_file *fp;
4521 struct nfs4_file *ret = NULL;
4522 bool alias_found = false;
4523
4524 spin_lock(&state_lock);
4525 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
4526 lockdep_is_held(&state_lock)) {
4527 if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) {
4528 if (refcount_inc_not_zero(&fp->fi_ref))
4529 ret = fp;
4530 } else if (d_inode(fh->fh_dentry) == fp->fi_inode)
4531 fp->fi_aliased = alias_found = true;
4532 }
4533 if (likely(ret == NULL)) {
4534 nfsd4_init_file(fh, hashval, new);
4535 new->fi_aliased = alias_found;
4536 ret = new;
4537 }
4538 spin_unlock(&state_lock);
4539 return ret;
4540}
4541
4542static struct nfs4_file * find_file(struct svc_fh *fh)
4543{
4544 struct nfs4_file *fp;
4545 unsigned int hashval = file_hashval(fh);
4546
4547 rcu_read_lock();
4548 fp = find_file_locked(fh, hashval);
4549 rcu_read_unlock();
4550 return fp;
4551}
4552
4553static struct nfs4_file *
4554find_or_add_file(struct nfs4_file *new, struct svc_fh *fh)
4555{
4556 struct nfs4_file *fp;
4557 unsigned int hashval = file_hashval(fh);
4558
4559 rcu_read_lock();
4560 fp = find_file_locked(fh, hashval);
4561 rcu_read_unlock();
4562 if (fp)
4563 return fp;
4564
4565 return insert_file(new, fh, hashval);
4566}
4567
4568
4569
4570
4571
4572static __be32
4573nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
4574{
4575 struct nfs4_file *fp;
4576 __be32 ret = nfs_ok;
4577
4578 fp = find_file(current_fh);
4579 if (!fp)
4580 return ret;
4581
4582 spin_lock(&fp->fi_lock);
4583 if (fp->fi_share_deny & deny_type)
4584 ret = nfserr_locked;
4585 spin_unlock(&fp->fi_lock);
4586 put_nfs4_file(fp);
4587 return ret;
4588}
4589
4590static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
4591{
4592 struct nfs4_delegation *dp = cb_to_delegation(cb);
4593 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
4594 nfsd_net_id);
4595
4596 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
4597
4598
4599
4600
4601
4602
4603
4604
4605 spin_lock(&state_lock);
4606 if (delegation_hashed(dp) && dp->dl_time == 0) {
4607 dp->dl_time = ktime_get_boottime_seconds();
4608 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
4609 }
4610 spin_unlock(&state_lock);
4611}
4612
4613static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
4614 struct rpc_task *task)
4615{
4616 struct nfs4_delegation *dp = cb_to_delegation(cb);
4617
4618 if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||
4619 dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)
4620 return 1;
4621
4622 switch (task->tk_status) {
4623 case 0:
4624 return 1;
4625 case -NFS4ERR_DELAY:
4626 rpc_delay(task, 2 * HZ);
4627 return 0;
4628 case -EBADHANDLE:
4629 case -NFS4ERR_BAD_STATEID:
4630
4631
4632
4633
4634 if (dp->dl_retries--) {
4635 rpc_delay(task, 2 * HZ);
4636 return 0;
4637 }
4638 fallthrough;
4639 default:
4640 return 1;
4641 }
4642}
4643
4644static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
4645{
4646 struct nfs4_delegation *dp = cb_to_delegation(cb);
4647
4648 nfs4_put_stid(&dp->dl_stid);
4649}
4650
4651static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
4652 .prepare = nfsd4_cb_recall_prepare,
4653 .done = nfsd4_cb_recall_done,
4654 .release = nfsd4_cb_recall_release,
4655};
4656
4657static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
4658{
4659
4660
4661
4662
4663
4664
4665
4666 refcount_inc(&dp->dl_stid.sc_count);
4667 nfsd4_run_cb(&dp->dl_recall);
4668}
4669
4670
4671static bool
4672nfsd_break_deleg_cb(struct file_lock *fl)
4673{
4674 bool ret = false;
4675 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
4676 struct nfs4_file *fp = dp->dl_stid.sc_file;
4677
4678 trace_nfsd_cb_recall(&dp->dl_stid);
4679
4680
4681
4682
4683
4684
4685 fl->fl_break_time = 0;
4686
4687 spin_lock(&fp->fi_lock);
4688 fp->fi_had_conflict = true;
4689 nfsd_break_one_deleg(dp);
4690 spin_unlock(&fp->fi_lock);
4691 return ret;
4692}
4693
4694static bool nfsd_breaker_owns_lease(struct file_lock *fl)
4695{
4696 struct nfs4_delegation *dl = fl->fl_owner;
4697 struct svc_rqst *rqst;
4698 struct nfs4_client *clp;
4699
4700 if (!i_am_nfsd())
4701 return NULL;
4702 rqst = kthread_data(current);
4703
4704 if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4)
4705 return NULL;
4706 clp = *(rqst->rq_lease_breaker);
4707 return dl->dl_stid.sc_client == clp;
4708}
4709
4710static int
4711nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
4712 struct list_head *dispose)
4713{
4714 if (arg & F_UNLCK)
4715 return lease_modify(onlist, arg, dispose);
4716 else
4717 return -EAGAIN;
4718}
4719
4720static const struct lock_manager_operations nfsd_lease_mng_ops = {
4721 .lm_breaker_owns_lease = nfsd_breaker_owns_lease,
4722 .lm_break = nfsd_break_deleg_cb,
4723 .lm_change = nfsd_change_deleg_cb,
4724};
4725
4726static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
4727{
4728 if (nfsd4_has_session(cstate))
4729 return nfs_ok;
4730 if (seqid == so->so_seqid - 1)
4731 return nfserr_replay_me;
4732 if (seqid == so->so_seqid)
4733 return nfs_ok;
4734 return nfserr_bad_seqid;
4735}
4736
4737static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions,
4738 struct nfsd_net *nn)
4739{
4740 struct nfs4_client *found;
4741
4742 spin_lock(&nn->client_lock);
4743 found = find_confirmed_client(clid, sessions, nn);
4744 if (found)
4745 atomic_inc(&found->cl_rpc_users);
4746 spin_unlock(&nn->client_lock);
4747 return found;
4748}
4749
4750static __be32 set_client(clientid_t *clid,
4751 struct nfsd4_compound_state *cstate,
4752 struct nfsd_net *nn)
4753{
4754 if (cstate->clp) {
4755 if (!same_clid(&cstate->clp->cl_clientid, clid))
4756 return nfserr_stale_clientid;
4757 return nfs_ok;
4758 }
4759 if (STALE_CLIENTID(clid, nn))
4760 return nfserr_stale_clientid;
4761
4762
4763
4764
4765 cstate->clp = lookup_clientid(clid, false, nn);
4766 if (!cstate->clp)
4767 return nfserr_expired;
4768 return nfs_ok;
4769}
4770
4771__be32
4772nfsd4_process_open1(struct nfsd4_compound_state *cstate,
4773 struct nfsd4_open *open, struct nfsd_net *nn)
4774{
4775 clientid_t *clientid = &open->op_clientid;
4776 struct nfs4_client *clp = NULL;
4777 unsigned int strhashval;
4778 struct nfs4_openowner *oo = NULL;
4779 __be32 status;
4780
4781
4782
4783
4784
4785 open->op_file = nfsd4_alloc_file();
4786 if (open->op_file == NULL)
4787 return nfserr_jukebox;
4788
4789 status = set_client(clientid, cstate, nn);
4790 if (status)
4791 return status;
4792 clp = cstate->clp;
4793
4794 strhashval = ownerstr_hashval(&open->op_owner);
4795 oo = find_openstateowner_str(strhashval, open, clp);
4796 open->op_openowner = oo;
4797 if (!oo) {
4798 goto new_owner;
4799 }
4800 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
4801
4802 release_openowner(oo);
4803 open->op_openowner = NULL;
4804 goto new_owner;
4805 }
4806 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
4807 if (status)
4808 return status;
4809 goto alloc_stateid;
4810new_owner:
4811 oo = alloc_init_open_stateowner(strhashval, open, cstate);
4812 if (oo == NULL)
4813 return nfserr_jukebox;
4814 open->op_openowner = oo;
4815alloc_stateid:
4816 open->op_stp = nfs4_alloc_open_stateid(clp);
4817 if (!open->op_stp)
4818 return nfserr_jukebox;
4819
4820 if (nfsd4_has_session(cstate) &&
4821 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
4822 open->op_odstate = alloc_clnt_odstate(clp);
4823 if (!open->op_odstate)
4824 return nfserr_jukebox;
4825 }
4826
4827 return nfs_ok;
4828}
4829
4830static inline __be32
4831nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
4832{
4833 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
4834 return nfserr_openmode;
4835 else
4836 return nfs_ok;
4837}
4838
4839static int share_access_to_flags(u32 share_access)
4840{
4841 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
4842}
4843
4844static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
4845{
4846 struct nfs4_stid *ret;
4847
4848 ret = find_stateid_by_type(cl, s,
4849 NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID);
4850 if (!ret)
4851 return NULL;
4852 return delegstateid(ret);
4853}
4854
4855static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
4856{
4857 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
4858 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
4859}
4860
4861static __be32
4862nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
4863 struct nfs4_delegation **dp)
4864{
4865 int flags;
4866 __be32 status = nfserr_bad_stateid;
4867 struct nfs4_delegation *deleg;
4868
4869 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
4870 if (deleg == NULL)
4871 goto out;
4872 if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {
4873 nfs4_put_stid(&deleg->dl_stid);
4874 if (cl->cl_minorversion)
4875 status = nfserr_deleg_revoked;
4876 goto out;
4877 }
4878 flags = share_access_to_flags(open->op_share_access);
4879 status = nfs4_check_delegmode(deleg, flags);
4880 if (status) {
4881 nfs4_put_stid(&deleg->dl_stid);
4882 goto out;
4883 }
4884 *dp = deleg;
4885out:
4886 if (!nfsd4_is_deleg_cur(open))
4887 return nfs_ok;
4888 if (status)
4889 return status;
4890 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4891 return nfs_ok;
4892}
4893
4894static inline int nfs4_access_to_access(u32 nfs4_access)
4895{
4896 int flags = 0;
4897
4898 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
4899 flags |= NFSD_MAY_READ;
4900 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
4901 flags |= NFSD_MAY_WRITE;
4902 return flags;
4903}
4904
4905static inline __be32
4906nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
4907 struct nfsd4_open *open)
4908{
4909 struct iattr iattr = {
4910 .ia_valid = ATTR_SIZE,
4911 .ia_size = 0,
4912 };
4913 if (!open->op_truncate)
4914 return 0;
4915 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
4916 return nfserr_inval;
4917 return nfsd_setattr(rqstp, fh, &iattr, 0, (time64_t)0);
4918}
4919
4920static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
4921 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
4922 struct nfsd4_open *open)
4923{
4924 struct nfsd_file *nf = NULL;
4925 __be32 status;
4926 int oflag = nfs4_access_to_omode(open->op_share_access);
4927 int access = nfs4_access_to_access(open->op_share_access);
4928 unsigned char old_access_bmap, old_deny_bmap;
4929
4930 spin_lock(&fp->fi_lock);
4931
4932
4933
4934
4935
4936 status = nfs4_file_check_deny(fp, open->op_share_deny);
4937 if (status != nfs_ok) {
4938 spin_unlock(&fp->fi_lock);
4939 goto out;
4940 }
4941
4942
4943 status = nfs4_file_get_access(fp, open->op_share_access);
4944 if (status != nfs_ok) {
4945 spin_unlock(&fp->fi_lock);
4946 goto out;
4947 }
4948
4949
4950 old_access_bmap = stp->st_access_bmap;
4951 set_access(open->op_share_access, stp);
4952
4953
4954 old_deny_bmap = stp->st_deny_bmap;
4955 set_deny(open->op_share_deny, stp);
4956 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4957
4958 if (!fp->fi_fds[oflag]) {
4959 spin_unlock(&fp->fi_lock);
4960 status = nfsd_file_acquire(rqstp, cur_fh, access, &nf);
4961 if (status)
4962 goto out_put_access;
4963 spin_lock(&fp->fi_lock);
4964 if (!fp->fi_fds[oflag]) {
4965 fp->fi_fds[oflag] = nf;
4966 nf = NULL;
4967 }
4968 }
4969 spin_unlock(&fp->fi_lock);
4970 if (nf)
4971 nfsd_file_put(nf);
4972
4973 status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode,
4974 access));
4975 if (status)
4976 goto out_put_access;
4977
4978 status = nfsd4_truncate(rqstp, cur_fh, open);
4979 if (status)
4980 goto out_put_access;
4981out:
4982 return status;
4983out_put_access:
4984 stp->st_access_bmap = old_access_bmap;
4985 nfs4_file_put_access(fp, open->op_share_access);
4986 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
4987 goto out;
4988}
4989
4990static __be32
4991nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
4992{
4993 __be32 status;
4994 unsigned char old_deny_bmap = stp->st_deny_bmap;
4995
4996 if (!test_access(open->op_share_access, stp))
4997 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
4998
4999
5000 spin_lock(&fp->fi_lock);
5001 status = nfs4_file_check_deny(fp, open->op_share_deny);
5002 if (status == nfs_ok) {
5003 set_deny(open->op_share_deny, stp);
5004 fp->fi_share_deny |=
5005 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
5006 }
5007 spin_unlock(&fp->fi_lock);
5008
5009 if (status != nfs_ok)
5010 return status;
5011
5012 status = nfsd4_truncate(rqstp, cur_fh, open);
5013 if (status != nfs_ok)
5014 reset_union_bmap_deny(old_deny_bmap, stp);
5015 return status;
5016}
5017
5018
5019static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
5020{
5021 if (clp->cl_cb_state == NFSD4_CB_UP)
5022 return true;
5023
5024
5025
5026
5027
5028 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
5029}
5030
5031static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp,
5032 int flag)
5033{
5034 struct file_lock *fl;
5035
5036 fl = locks_alloc_lock();
5037 if (!fl)
5038 return NULL;
5039 fl->fl_lmops = &nfsd_lease_mng_ops;
5040 fl->fl_flags = FL_DELEG;
5041 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
5042 fl->fl_end = OFFSET_MAX;
5043 fl->fl_owner = (fl_owner_t)dp;
5044 fl->fl_pid = current->tgid;
5045 fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file;
5046 return fl;
5047}
5048
5049static int nfsd4_check_conflicting_opens(struct nfs4_client *clp,
5050 struct nfs4_file *fp)
5051{
5052 struct nfs4_ol_stateid *st;
5053 struct file *f = fp->fi_deleg_file->nf_file;
5054 struct inode *ino = locks_inode(f);
5055 int writes;
5056
5057 writes = atomic_read(&ino->i_writecount);
5058 if (!writes)
5059 return 0;
5060
5061
5062
5063
5064
5065
5066
5067 if (fp->fi_aliased)
5068 return -EAGAIN;
5069
5070
5071
5072
5073
5074 smp_mb__after_atomic();
5075
5076 if (fp->fi_fds[O_WRONLY])
5077 writes--;
5078 if (fp->fi_fds[O_RDWR])
5079 writes--;
5080 if (writes > 0)
5081 return -EAGAIN;
5082
5083
5084
5085
5086
5087
5088
5089 spin_lock(&fp->fi_lock);
5090 list_for_each_entry(st, &fp->fi_stateids, st_perfile) {
5091 if (st->st_openstp == NULL &&
5092 access_permit_write(st) &&
5093 st->st_stid.sc_client != clp) {
5094 spin_unlock(&fp->fi_lock);
5095 return -EAGAIN;
5096 }
5097 }
5098 spin_unlock(&fp->fi_lock);
5099
5100
5101
5102
5103
5104
5105 return 0;
5106}
5107
5108static struct nfs4_delegation *
5109nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
5110 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
5111{
5112 int status = 0;
5113 struct nfs4_delegation *dp;
5114 struct nfsd_file *nf;
5115 struct file_lock *fl;
5116
5117
5118
5119
5120
5121
5122 if (fp->fi_had_conflict)
5123 return ERR_PTR(-EAGAIN);
5124
5125 nf = find_readable_file(fp);
5126 if (!nf) {
5127
5128
5129
5130
5131
5132 return ERR_PTR(-EAGAIN);
5133 }
5134 spin_lock(&state_lock);
5135 spin_lock(&fp->fi_lock);
5136 if (nfs4_delegation_exists(clp, fp))
5137 status = -EAGAIN;
5138 else if (!fp->fi_deleg_file) {
5139 fp->fi_deleg_file = nf;
5140
5141
5142 fp->fi_delegees = 1;
5143 nf = NULL;
5144 } else
5145 fp->fi_delegees++;
5146 spin_unlock(&fp->fi_lock);
5147 spin_unlock(&state_lock);
5148 if (nf)
5149 nfsd_file_put(nf);
5150 if (status)
5151 return ERR_PTR(status);
5152
5153 status = -ENOMEM;
5154 dp = alloc_init_deleg(clp, fp, fh, odstate);
5155 if (!dp)
5156 goto out_delegees;
5157
5158 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
5159 if (!fl)
5160 goto out_clnt_odstate;
5161
5162 status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL);
5163 if (fl)
5164 locks_free_lock(fl);
5165 if (status)
5166 goto out_clnt_odstate;
5167 status = nfsd4_check_conflicting_opens(clp, fp);
5168 if (status)
5169 goto out_unlock;
5170
5171 spin_lock(&state_lock);
5172 spin_lock(&fp->fi_lock);
5173 if (fp->fi_had_conflict)
5174 status = -EAGAIN;
5175 else
5176 status = hash_delegation_locked(dp, fp);
5177 spin_unlock(&fp->fi_lock);
5178 spin_unlock(&state_lock);
5179
5180 if (status)
5181 goto out_unlock;
5182
5183 return dp;
5184out_unlock:
5185 vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp);
5186out_clnt_odstate:
5187 put_clnt_odstate(dp->dl_clnt_odstate);
5188 nfs4_put_stid(&dp->dl_stid);
5189out_delegees:
5190 put_deleg_file(fp);
5191 return ERR_PTR(status);
5192}
5193
5194static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
5195{
5196 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
5197 if (status == -EAGAIN)
5198 open->op_why_no_deleg = WND4_CONTENTION;
5199 else {
5200 open->op_why_no_deleg = WND4_RESOURCE;
5201 switch (open->op_deleg_want) {
5202 case NFS4_SHARE_WANT_READ_DELEG:
5203 case NFS4_SHARE_WANT_WRITE_DELEG:
5204 case NFS4_SHARE_WANT_ANY_DELEG:
5205 break;
5206 case NFS4_SHARE_WANT_CANCEL:
5207 open->op_why_no_deleg = WND4_CANCELLED;
5208 break;
5209 case NFS4_SHARE_WANT_NO_DELEG:
5210 WARN_ON_ONCE(1);
5211 }
5212 }
5213}
5214
5215
5216
5217
5218
5219
5220
5221static void
5222nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
5223 struct nfs4_ol_stateid *stp)
5224{
5225 struct nfs4_delegation *dp;
5226 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
5227 struct nfs4_client *clp = stp->st_stid.sc_client;
5228 int cb_up;
5229 int status = 0;
5230
5231 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
5232 open->op_recall = 0;
5233 switch (open->op_claim_type) {
5234 case NFS4_OPEN_CLAIM_PREVIOUS:
5235 if (!cb_up)
5236 open->op_recall = 1;
5237 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
5238 goto out_no_deleg;
5239 break;
5240 case NFS4_OPEN_CLAIM_NULL:
5241 case NFS4_OPEN_CLAIM_FH:
5242
5243
5244
5245
5246
5247 if (locks_in_grace(clp->net))
5248 goto out_no_deleg;
5249 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
5250 goto out_no_deleg;
5251 break;
5252 default:
5253 goto out_no_deleg;
5254 }
5255 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
5256 if (IS_ERR(dp))
5257 goto out_no_deleg;
5258
5259 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
5260
5261 trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);
5262 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
5263 nfs4_put_stid(&dp->dl_stid);
5264 return;
5265out_no_deleg:
5266 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
5267 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
5268 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
5269 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
5270 open->op_recall = 1;
5271 }
5272
5273
5274 if (open->op_deleg_want)
5275 nfsd4_open_deleg_none_ext(open, status);
5276 return;
5277}
5278
5279static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
5280 struct nfs4_delegation *dp)
5281{
5282 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
5283 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
5284 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
5285 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
5286 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
5287 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
5288 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
5289 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
5290 }
5291
5292
5293
5294
5295}
5296
5297__be32
5298nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
5299{
5300 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5301 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
5302 struct nfs4_file *fp = NULL;
5303 struct nfs4_ol_stateid *stp = NULL;
5304 struct nfs4_delegation *dp = NULL;
5305 __be32 status;
5306 bool new_stp = false;
5307
5308
5309
5310
5311
5312
5313 fp = find_or_add_file(open->op_file, current_fh);
5314 if (fp != open->op_file) {
5315 status = nfs4_check_deleg(cl, open, &dp);
5316 if (status)
5317 goto out;
5318 stp = nfsd4_find_and_lock_existing_open(fp, open);
5319 } else {
5320 open->op_file = NULL;
5321 status = nfserr_bad_stateid;
5322 if (nfsd4_is_deleg_cur(open))
5323 goto out;
5324 }
5325
5326 if (!stp) {
5327 stp = init_open_stateid(fp, open);
5328 if (!open->op_stp)
5329 new_stp = true;
5330 }
5331
5332
5333
5334
5335
5336
5337
5338 if (!new_stp) {
5339
5340 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
5341 if (status) {
5342 mutex_unlock(&stp->st_mutex);
5343 goto out;
5344 }
5345 } else {
5346 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
5347 if (status) {
5348 stp->st_stid.sc_type = NFS4_CLOSED_STID;
5349 release_open_stateid(stp);
5350 mutex_unlock(&stp->st_mutex);
5351 goto out;
5352 }
5353
5354 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
5355 open->op_odstate);
5356 if (stp->st_clnt_odstate == open->op_odstate)
5357 open->op_odstate = NULL;
5358 }
5359
5360 nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
5361 mutex_unlock(&stp->st_mutex);
5362
5363 if (nfsd4_has_session(&resp->cstate)) {
5364 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
5365 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
5366 open->op_why_no_deleg = WND4_NOT_WANTED;
5367 goto nodeleg;
5368 }
5369 }
5370
5371
5372
5373
5374
5375 nfs4_open_delegation(current_fh, open, stp);
5376nodeleg:
5377 status = nfs_ok;
5378 trace_nfsd_open(&stp->st_stid.sc_stateid);
5379out:
5380
5381 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
5382 open->op_deleg_want)
5383 nfsd4_deleg_xgrade_none_ext(open, dp);
5384
5385 if (fp)
5386 put_nfs4_file(fp);
5387 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
5388 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
5389
5390
5391
5392 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
5393 if (nfsd4_has_session(&resp->cstate))
5394 open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;
5395 else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))
5396 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
5397
5398 if (dp)
5399 nfs4_put_stid(&dp->dl_stid);
5400 if (stp)
5401 nfs4_put_stid(&stp->st_stid);
5402
5403 return status;
5404}
5405
5406void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
5407 struct nfsd4_open *open)
5408{
5409 if (open->op_openowner) {
5410 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
5411
5412 nfsd4_cstate_assign_replay(cstate, so);
5413 nfs4_put_stateowner(so);
5414 }
5415 if (open->op_file)
5416 kmem_cache_free(file_slab, open->op_file);
5417 if (open->op_stp)
5418 nfs4_put_stid(&open->op_stp->st_stid);
5419 if (open->op_odstate)
5420 kmem_cache_free(odstate_slab, open->op_odstate);
5421}
5422
5423__be32
5424nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5425 union nfsd4_op_u *u)
5426{
5427 clientid_t *clid = &u->renew;
5428 struct nfs4_client *clp;
5429 __be32 status;
5430 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5431
5432 trace_nfsd_clid_renew(clid);
5433 status = set_client(clid, cstate, nn);
5434 if (status)
5435 return status;
5436 clp = cstate->clp;
5437 if (!list_empty(&clp->cl_delegations)
5438 && clp->cl_cb_state != NFSD4_CB_UP)
5439 return nfserr_cb_path_down;
5440 return nfs_ok;
5441}
5442
5443void
5444nfsd4_end_grace(struct nfsd_net *nn)
5445{
5446
5447 if (nn->grace_ended)
5448 return;
5449
5450 trace_nfsd_grace_complete(nn);
5451 nn->grace_ended = true;
5452
5453
5454
5455
5456
5457
5458 nfsd4_record_grace_done(nn);
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468 locks_end_grace(&nn->nfsd4_manager);
5469
5470
5471
5472
5473
5474}
5475
5476
5477
5478
5479
5480static bool clients_still_reclaiming(struct nfsd_net *nn)
5481{
5482 time64_t double_grace_period_end = nn->boot_time +
5483 2 * nn->nfsd4_lease;
5484
5485 if (nn->track_reclaim_completes &&
5486 atomic_read(&nn->nr_reclaim_complete) ==
5487 nn->reclaim_str_hashtbl_size)
5488 return false;
5489 if (!nn->somebody_reclaimed)
5490 return false;
5491 nn->somebody_reclaimed = false;
5492
5493
5494
5495
5496 if (ktime_get_boottime_seconds() > double_grace_period_end)
5497 return false;
5498 return true;
5499}
5500
5501struct laundry_time {
5502 time64_t cutoff;
5503 time64_t new_timeo;
5504};
5505
5506static bool state_expired(struct laundry_time *lt, time64_t last_refresh)
5507{
5508 time64_t time_remaining;
5509
5510 if (last_refresh < lt->cutoff)
5511 return true;
5512 time_remaining = last_refresh - lt->cutoff;
5513 lt->new_timeo = min(lt->new_timeo, time_remaining);
5514 return false;
5515}
5516
5517#ifdef CONFIG_NFSD_V4_2_INTER_SSC
5518void nfsd4_ssc_init_umount_work(struct nfsd_net *nn)
5519{
5520 spin_lock_init(&nn->nfsd_ssc_lock);
5521 INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list);
5522 init_waitqueue_head(&nn->nfsd_ssc_waitq);
5523}
5524EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work);
5525
5526
5527
5528
5529
5530static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn)
5531{
5532 struct nfsd4_ssc_umount_item *ni = NULL;
5533 struct nfsd4_ssc_umount_item *tmp;
5534
5535 spin_lock(&nn->nfsd_ssc_lock);
5536 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
5537 list_del(&ni->nsui_list);
5538 spin_unlock(&nn->nfsd_ssc_lock);
5539 mntput(ni->nsui_vfsmount);
5540 kfree(ni);
5541 spin_lock(&nn->nfsd_ssc_lock);
5542 }
5543 spin_unlock(&nn->nfsd_ssc_lock);
5544}
5545
5546static void nfsd4_ssc_expire_umount(struct nfsd_net *nn)
5547{
5548 bool do_wakeup = false;
5549 struct nfsd4_ssc_umount_item *ni = NULL;
5550 struct nfsd4_ssc_umount_item *tmp;
5551
5552 spin_lock(&nn->nfsd_ssc_lock);
5553 list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
5554 if (time_after(jiffies, ni->nsui_expire)) {
5555 if (refcount_read(&ni->nsui_refcnt) > 1)
5556 continue;
5557
5558
5559 ni->nsui_busy = true;
5560 spin_unlock(&nn->nfsd_ssc_lock);
5561 mntput(ni->nsui_vfsmount);
5562 spin_lock(&nn->nfsd_ssc_lock);
5563
5564
5565 list_del(&ni->nsui_list);
5566 kfree(ni);
5567
5568
5569 do_wakeup = true;
5570 continue;
5571 }
5572 break;
5573 }
5574 if (do_wakeup)
5575 wake_up_all(&nn->nfsd_ssc_waitq);
5576 spin_unlock(&nn->nfsd_ssc_lock);
5577}
5578#endif
5579
5580static time64_t
5581nfs4_laundromat(struct nfsd_net *nn)
5582{
5583 struct nfs4_client *clp;
5584 struct nfs4_openowner *oo;
5585 struct nfs4_delegation *dp;
5586 struct nfs4_ol_stateid *stp;
5587 struct nfsd4_blocked_lock *nbl;
5588 struct list_head *pos, *next, reaplist;
5589 struct laundry_time lt = {
5590 .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease,
5591 .new_timeo = nn->nfsd4_lease
5592 };
5593 struct nfs4_cpntf_state *cps;
5594 copy_stateid_t *cps_t;
5595 int i;
5596
5597 if (clients_still_reclaiming(nn)) {
5598 lt.new_timeo = 0;
5599 goto out;
5600 }
5601 nfsd4_end_grace(nn);
5602 INIT_LIST_HEAD(&reaplist);
5603
5604 spin_lock(&nn->s2s_cp_lock);
5605 idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {
5606 cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid);
5607 if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&
5608 state_expired(<, cps->cpntf_time))
5609 _free_cpntf_state_locked(nn, cps);
5610 }
5611 spin_unlock(&nn->s2s_cp_lock);
5612
5613 spin_lock(&nn->client_lock);
5614 list_for_each_safe(pos, next, &nn->client_lru) {
5615 clp = list_entry(pos, struct nfs4_client, cl_lru);
5616 if (!state_expired(<, clp->cl_time))
5617 break;
5618 if (mark_client_expired_locked(clp))
5619 continue;
5620 list_add(&clp->cl_lru, &reaplist);
5621 }
5622 spin_unlock(&nn->client_lock);
5623 list_for_each_safe(pos, next, &reaplist) {
5624 clp = list_entry(pos, struct nfs4_client, cl_lru);
5625 trace_nfsd_clid_purged(&clp->cl_clientid);
5626 list_del_init(&clp->cl_lru);
5627 expire_client(clp);
5628 }
5629 spin_lock(&state_lock);
5630 list_for_each_safe(pos, next, &nn->del_recall_lru) {
5631 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5632 if (!state_expired(<, dp->dl_time))
5633 break;
5634 WARN_ON(!unhash_delegation_locked(dp));
5635 list_add(&dp->dl_recall_lru, &reaplist);
5636 }
5637 spin_unlock(&state_lock);
5638 while (!list_empty(&reaplist)) {
5639 dp = list_first_entry(&reaplist, struct nfs4_delegation,
5640 dl_recall_lru);
5641 list_del_init(&dp->dl_recall_lru);
5642 revoke_delegation(dp);
5643 }
5644
5645 spin_lock(&nn->client_lock);
5646 while (!list_empty(&nn->close_lru)) {
5647 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
5648 oo_close_lru);
5649 if (!state_expired(<, oo->oo_time))
5650 break;
5651 list_del_init(&oo->oo_close_lru);
5652 stp = oo->oo_last_closed_stid;
5653 oo->oo_last_closed_stid = NULL;
5654 spin_unlock(&nn->client_lock);
5655 nfs4_put_stid(&stp->st_stid);
5656 spin_lock(&nn->client_lock);
5657 }
5658 spin_unlock(&nn->client_lock);
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671 BUG_ON(!list_empty(&reaplist));
5672 spin_lock(&nn->blocked_locks_lock);
5673 while (!list_empty(&nn->blocked_locks_lru)) {
5674 nbl = list_first_entry(&nn->blocked_locks_lru,
5675 struct nfsd4_blocked_lock, nbl_lru);
5676 if (!state_expired(<, nbl->nbl_time))
5677 break;
5678 list_move(&nbl->nbl_lru, &reaplist);
5679 list_del_init(&nbl->nbl_list);
5680 }
5681 spin_unlock(&nn->blocked_locks_lock);
5682
5683 while (!list_empty(&reaplist)) {
5684 nbl = list_first_entry(&reaplist,
5685 struct nfsd4_blocked_lock, nbl_lru);
5686 list_del_init(&nbl->nbl_lru);
5687 free_blocked_lock(nbl);
5688 }
5689#ifdef CONFIG_NFSD_V4_2_INTER_SSC
5690
5691 nfsd4_ssc_expire_umount(nn);
5692#endif
5693out:
5694 return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
5695}
5696
5697static struct workqueue_struct *laundry_wq;
5698static void laundromat_main(struct work_struct *);
5699
5700static void
5701laundromat_main(struct work_struct *laundry)
5702{
5703 time64_t t;
5704 struct delayed_work *dwork = to_delayed_work(laundry);
5705 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
5706 laundromat_work);
5707
5708 t = nfs4_laundromat(nn);
5709 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
5710}
5711
5712static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
5713{
5714 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
5715 return nfserr_bad_stateid;
5716 return nfs_ok;
5717}
5718
5719static
5720__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
5721{
5722 __be32 status = nfserr_openmode;
5723
5724
5725 if (stp->st_openstp)
5726 stp = stp->st_openstp;
5727 if ((flags & WR_STATE) && !access_permit_write(stp))
5728 goto out;
5729 if ((flags & RD_STATE) && !access_permit_read(stp))
5730 goto out;
5731 status = nfs_ok;
5732out:
5733 return status;
5734}
5735
5736static inline __be32
5737check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
5738{
5739 if (ONE_STATEID(stateid) && (flags & RD_STATE))
5740 return nfs_ok;
5741 else if (opens_in_grace(net)) {
5742
5743
5744 return nfserr_grace;
5745 } else if (flags & WR_STATE)
5746 return nfs4_share_conflict(current_fh,
5747 NFS4_SHARE_DENY_WRITE);
5748 else
5749 return nfs4_share_conflict(current_fh,
5750 NFS4_SHARE_DENY_READ);
5751}
5752
5753static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
5754{
5755
5756
5757
5758
5759 if (has_session && in->si_generation == 0)
5760 return nfs_ok;
5761
5762 if (in->si_generation == ref->si_generation)
5763 return nfs_ok;
5764
5765
5766 if (nfsd4_stateid_generation_after(in, ref))
5767 return nfserr_bad_stateid;
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778 return nfserr_old_stateid;
5779}
5780
5781static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session)
5782{
5783 __be32 ret;
5784
5785 spin_lock(&s->sc_lock);
5786 ret = nfsd4_verify_open_stid(s);
5787 if (ret == nfs_ok)
5788 ret = check_stateid_generation(in, &s->sc_stateid, has_session);
5789 spin_unlock(&s->sc_lock);
5790 return ret;
5791}
5792
5793static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
5794{
5795 if (ols->st_stateowner->so_is_open_owner &&
5796 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
5797 return nfserr_bad_stateid;
5798 return nfs_ok;
5799}
5800
5801static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
5802{
5803 struct nfs4_stid *s;
5804 __be32 status = nfserr_bad_stateid;
5805
5806 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
5807 CLOSE_STATEID(stateid))
5808 return status;
5809 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid))
5810 return status;
5811 spin_lock(&cl->cl_lock);
5812 s = find_stateid_locked(cl, stateid);
5813 if (!s)
5814 goto out_unlock;
5815 status = nfsd4_stid_check_stateid_generation(stateid, s, 1);
5816 if (status)
5817 goto out_unlock;
5818 switch (s->sc_type) {
5819 case NFS4_DELEG_STID:
5820 status = nfs_ok;
5821 break;
5822 case NFS4_REVOKED_DELEG_STID:
5823 status = nfserr_deleg_revoked;
5824 break;
5825 case NFS4_OPEN_STID:
5826 case NFS4_LOCK_STID:
5827 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
5828 break;
5829 default:
5830 printk("unknown stateid type %x\n", s->sc_type);
5831 fallthrough;
5832 case NFS4_CLOSED_STID:
5833 case NFS4_CLOSED_DELEG_STID:
5834 status = nfserr_bad_stateid;
5835 }
5836out_unlock:
5837 spin_unlock(&cl->cl_lock);
5838 return status;
5839}
5840
5841__be32
5842nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
5843 stateid_t *stateid, unsigned char typemask,
5844 struct nfs4_stid **s, struct nfsd_net *nn)
5845{
5846 __be32 status;
5847 bool return_revoked = false;
5848
5849
5850
5851
5852
5853 if (typemask & NFS4_REVOKED_DELEG_STID)
5854 return_revoked = true;
5855 else if (typemask & NFS4_DELEG_STID)
5856 typemask |= NFS4_REVOKED_DELEG_STID;
5857
5858 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
5859 CLOSE_STATEID(stateid))
5860 return nfserr_bad_stateid;
5861 status = set_client(&stateid->si_opaque.so_clid, cstate, nn);
5862 if (status == nfserr_stale_clientid) {
5863 if (cstate->session)
5864 return nfserr_bad_stateid;
5865 return nfserr_stale_stateid;
5866 }
5867 if (status)
5868 return status;
5869 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
5870 if (!*s)
5871 return nfserr_bad_stateid;
5872 if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
5873 nfs4_put_stid(*s);
5874 if (cstate->minorversion)
5875 return nfserr_deleg_revoked;
5876 return nfserr_bad_stateid;
5877 }
5878 return nfs_ok;
5879}
5880
5881static struct nfsd_file *
5882nfs4_find_file(struct nfs4_stid *s, int flags)
5883{
5884 if (!s)
5885 return NULL;
5886
5887 switch (s->sc_type) {
5888 case NFS4_DELEG_STID:
5889 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
5890 return NULL;
5891 return nfsd_file_get(s->sc_file->fi_deleg_file);
5892 case NFS4_OPEN_STID:
5893 case NFS4_LOCK_STID:
5894 if (flags & RD_STATE)
5895 return find_readable_file(s->sc_file);
5896 else
5897 return find_writeable_file(s->sc_file);
5898 }
5899
5900 return NULL;
5901}
5902
5903static __be32
5904nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags)
5905{
5906 __be32 status;
5907
5908 status = nfsd4_check_openowner_confirmed(ols);
5909 if (status)
5910 return status;
5911 return nfs4_check_openmode(ols, flags);
5912}
5913
5914static __be32
5915nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
5916 struct nfsd_file **nfp, int flags)
5917{
5918 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
5919 struct nfsd_file *nf;
5920 __be32 status;
5921
5922 nf = nfs4_find_file(s, flags);
5923 if (nf) {
5924 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
5925 acc | NFSD_MAY_OWNER_OVERRIDE);
5926 if (status) {
5927 nfsd_file_put(nf);
5928 goto out;
5929 }
5930 } else {
5931 status = nfsd_file_acquire(rqstp, fhp, acc, &nf);
5932 if (status)
5933 return status;
5934 }
5935 *nfp = nf;
5936out:
5937 return status;
5938}
5939static void
5940_free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
5941{
5942 WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID);
5943 if (!refcount_dec_and_test(&cps->cp_stateid.sc_count))
5944 return;
5945 list_del(&cps->cp_list);
5946 idr_remove(&nn->s2s_cp_stateids,
5947 cps->cp_stateid.stid.si_opaque.so_id);
5948 kfree(cps);
5949}
5950
5951
5952
5953
5954
5955__be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
5956 struct nfs4_client *clp,
5957 struct nfs4_cpntf_state **cps)
5958{
5959 copy_stateid_t *cps_t;
5960 struct nfs4_cpntf_state *state = NULL;
5961
5962 if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)
5963 return nfserr_bad_stateid;
5964 spin_lock(&nn->s2s_cp_lock);
5965 cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);
5966 if (cps_t) {
5967 state = container_of(cps_t, struct nfs4_cpntf_state,
5968 cp_stateid);
5969 if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) {
5970 state = NULL;
5971 goto unlock;
5972 }
5973 if (!clp)
5974 refcount_inc(&state->cp_stateid.sc_count);
5975 else
5976 _free_cpntf_state_locked(nn, state);
5977 }
5978unlock:
5979 spin_unlock(&nn->s2s_cp_lock);
5980 if (!state)
5981 return nfserr_bad_stateid;
5982 if (!clp && state)
5983 *cps = state;
5984 return 0;
5985}
5986
5987static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
5988 struct nfs4_stid **stid)
5989{
5990 __be32 status;
5991 struct nfs4_cpntf_state *cps = NULL;
5992 struct nfs4_client *found;
5993
5994 status = manage_cpntf_state(nn, st, NULL, &cps);
5995 if (status)
5996 return status;
5997
5998 cps->cpntf_time = ktime_get_boottime_seconds();
5999
6000 status = nfserr_expired;
6001 found = lookup_clientid(&cps->cp_p_clid, true, nn);
6002 if (!found)
6003 goto out;
6004
6005 *stid = find_stateid_by_type(found, &cps->cp_p_stateid,
6006 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID);
6007 if (*stid)
6008 status = nfs_ok;
6009 else
6010 status = nfserr_bad_stateid;
6011
6012 put_client_renew(found);
6013out:
6014 nfs4_put_cpntf_state(nn, cps);
6015 return status;
6016}
6017
6018void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
6019{
6020 spin_lock(&nn->s2s_cp_lock);
6021 _free_cpntf_state_locked(nn, cps);
6022 spin_unlock(&nn->s2s_cp_lock);
6023}
6024
6025
6026
6027
6028__be32
6029nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
6030 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
6031 stateid_t *stateid, int flags, struct nfsd_file **nfp,
6032 struct nfs4_stid **cstid)
6033{
6034 struct net *net = SVC_NET(rqstp);
6035 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6036 struct nfs4_stid *s = NULL;
6037 __be32 status;
6038
6039 if (nfp)
6040 *nfp = NULL;
6041
6042 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
6043 status = check_special_stateids(net, fhp, stateid, flags);
6044 goto done;
6045 }
6046
6047 status = nfsd4_lookup_stateid(cstate, stateid,
6048 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
6049 &s, nn);
6050 if (status == nfserr_bad_stateid)
6051 status = find_cpntf_state(nn, stateid, &s);
6052 if (status)
6053 return status;
6054 status = nfsd4_stid_check_stateid_generation(stateid, s,
6055 nfsd4_has_session(cstate));
6056 if (status)
6057 goto out;
6058
6059 switch (s->sc_type) {
6060 case NFS4_DELEG_STID:
6061 status = nfs4_check_delegmode(delegstateid(s), flags);
6062 break;
6063 case NFS4_OPEN_STID:
6064 case NFS4_LOCK_STID:
6065 status = nfs4_check_olstateid(openlockstateid(s), flags);
6066 break;
6067 default:
6068 status = nfserr_bad_stateid;
6069 break;
6070 }
6071 if (status)
6072 goto out;
6073 status = nfs4_check_fh(fhp, s);
6074
6075done:
6076 if (status == nfs_ok && nfp)
6077 status = nfs4_check_file(rqstp, fhp, s, nfp, flags);
6078out:
6079 if (s) {
6080 if (!status && cstid)
6081 *cstid = s;
6082 else
6083 nfs4_put_stid(s);
6084 }
6085 return status;
6086}
6087
6088
6089
6090
6091__be32
6092nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6093 union nfsd4_op_u *u)
6094{
6095 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
6096 struct nfsd4_test_stateid_id *stateid;
6097 struct nfs4_client *cl = cstate->clp;
6098
6099 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
6100 stateid->ts_id_status =
6101 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
6102
6103 return nfs_ok;
6104}
6105
6106static __be32
6107nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
6108{
6109 struct nfs4_ol_stateid *stp = openlockstateid(s);
6110 __be32 ret;
6111
6112 ret = nfsd4_lock_ol_stateid(stp);
6113 if (ret)
6114 goto out_put_stid;
6115
6116 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
6117 if (ret)
6118 goto out;
6119
6120 ret = nfserr_locks_held;
6121 if (check_for_locks(stp->st_stid.sc_file,
6122 lockowner(stp->st_stateowner)))
6123 goto out;
6124
6125 release_lock_stateid(stp);
6126 ret = nfs_ok;
6127
6128out:
6129 mutex_unlock(&stp->st_mutex);
6130out_put_stid:
6131 nfs4_put_stid(s);
6132 return ret;
6133}
6134
6135__be32
6136nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6137 union nfsd4_op_u *u)
6138{
6139 struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
6140 stateid_t *stateid = &free_stateid->fr_stateid;
6141 struct nfs4_stid *s;
6142 struct nfs4_delegation *dp;
6143 struct nfs4_client *cl = cstate->clp;
6144 __be32 ret = nfserr_bad_stateid;
6145
6146 spin_lock(&cl->cl_lock);
6147 s = find_stateid_locked(cl, stateid);
6148 if (!s)
6149 goto out_unlock;
6150 spin_lock(&s->sc_lock);
6151 switch (s->sc_type) {
6152 case NFS4_DELEG_STID:
6153 ret = nfserr_locks_held;
6154 break;
6155 case NFS4_OPEN_STID:
6156 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
6157 if (ret)
6158 break;
6159 ret = nfserr_locks_held;
6160 break;
6161 case NFS4_LOCK_STID:
6162 spin_unlock(&s->sc_lock);
6163 refcount_inc(&s->sc_count);
6164 spin_unlock(&cl->cl_lock);
6165 ret = nfsd4_free_lock_stateid(stateid, s);
6166 goto out;
6167 case NFS4_REVOKED_DELEG_STID:
6168 spin_unlock(&s->sc_lock);
6169 dp = delegstateid(s);
6170 list_del_init(&dp->dl_recall_lru);
6171 spin_unlock(&cl->cl_lock);
6172 nfs4_put_stid(s);
6173 ret = nfs_ok;
6174 goto out;
6175
6176 }
6177 spin_unlock(&s->sc_lock);
6178out_unlock:
6179 spin_unlock(&cl->cl_lock);
6180out:
6181 return ret;
6182}
6183
6184static inline int
6185setlkflg (int type)
6186{
6187 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
6188 RD_STATE : WR_STATE;
6189}
6190
6191static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
6192{
6193 struct svc_fh *current_fh = &cstate->current_fh;
6194 struct nfs4_stateowner *sop = stp->st_stateowner;
6195 __be32 status;
6196
6197 status = nfsd4_check_seqid(cstate, sop, seqid);
6198 if (status)
6199 return status;
6200 status = nfsd4_lock_ol_stateid(stp);
6201 if (status != nfs_ok)
6202 return status;
6203 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
6204 if (status == nfs_ok)
6205 status = nfs4_check_fh(current_fh, &stp->st_stid);
6206 if (status != nfs_ok)
6207 mutex_unlock(&stp->st_mutex);
6208 return status;
6209}
6210
6211
6212
6213
6214static __be32
6215nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
6216 stateid_t *stateid, char typemask,
6217 struct nfs4_ol_stateid **stpp,
6218 struct nfsd_net *nn)
6219{
6220 __be32 status;
6221 struct nfs4_stid *s;
6222 struct nfs4_ol_stateid *stp = NULL;
6223
6224 trace_nfsd_preprocess(seqid, stateid);
6225
6226 *stpp = NULL;
6227 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
6228 if (status)
6229 return status;
6230 stp = openlockstateid(s);
6231 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
6232
6233 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
6234 if (!status)
6235 *stpp = stp;
6236 else
6237 nfs4_put_stid(&stp->st_stid);
6238 return status;
6239}
6240
6241static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
6242 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
6243{
6244 __be32 status;
6245 struct nfs4_openowner *oo;
6246 struct nfs4_ol_stateid *stp;
6247
6248 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
6249 NFS4_OPEN_STID, &stp, nn);
6250 if (status)
6251 return status;
6252 oo = openowner(stp->st_stateowner);
6253 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
6254 mutex_unlock(&stp->st_mutex);
6255 nfs4_put_stid(&stp->st_stid);
6256 return nfserr_bad_stateid;
6257 }
6258 *stpp = stp;
6259 return nfs_ok;
6260}
6261
6262__be32
6263nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6264 union nfsd4_op_u *u)
6265{
6266 struct nfsd4_open_confirm *oc = &u->open_confirm;
6267 __be32 status;
6268 struct nfs4_openowner *oo;
6269 struct nfs4_ol_stateid *stp;
6270 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6271
6272 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
6273 cstate->current_fh.fh_dentry);
6274
6275 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
6276 if (status)
6277 return status;
6278
6279 status = nfs4_preprocess_seqid_op(cstate,
6280 oc->oc_seqid, &oc->oc_req_stateid,
6281 NFS4_OPEN_STID, &stp, nn);
6282 if (status)
6283 goto out;
6284 oo = openowner(stp->st_stateowner);
6285 status = nfserr_bad_stateid;
6286 if (oo->oo_flags & NFS4_OO_CONFIRMED) {
6287 mutex_unlock(&stp->st_mutex);
6288 goto put_stateid;
6289 }
6290 oo->oo_flags |= NFS4_OO_CONFIRMED;
6291 nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
6292 mutex_unlock(&stp->st_mutex);
6293 trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid);
6294 nfsd4_client_record_create(oo->oo_owner.so_client);
6295 status = nfs_ok;
6296put_stateid:
6297 nfs4_put_stid(&stp->st_stid);
6298out:
6299 nfsd4_bump_seqid(cstate, status);
6300 return status;
6301}
6302
6303static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
6304{
6305 if (!test_access(access, stp))
6306 return;
6307 nfs4_file_put_access(stp->st_stid.sc_file, access);
6308 clear_access(access, stp);
6309}
6310
6311static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
6312{
6313 switch (to_access) {
6314 case NFS4_SHARE_ACCESS_READ:
6315 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
6316 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
6317 break;
6318 case NFS4_SHARE_ACCESS_WRITE:
6319 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
6320 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
6321 break;
6322 case NFS4_SHARE_ACCESS_BOTH:
6323 break;
6324 default:
6325 WARN_ON_ONCE(1);
6326 }
6327}
6328
6329__be32
6330nfsd4_open_downgrade(struct svc_rqst *rqstp,
6331 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
6332{
6333 struct nfsd4_open_downgrade *od = &u->open_downgrade;
6334 __be32 status;
6335 struct nfs4_ol_stateid *stp;
6336 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6337
6338 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
6339 cstate->current_fh.fh_dentry);
6340
6341
6342 if (od->od_deleg_want)
6343 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
6344 od->od_deleg_want);
6345
6346 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
6347 &od->od_stateid, &stp, nn);
6348 if (status)
6349 goto out;
6350 status = nfserr_inval;
6351 if (!test_access(od->od_share_access, stp)) {
6352 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
6353 stp->st_access_bmap, od->od_share_access);
6354 goto put_stateid;
6355 }
6356 if (!test_deny(od->od_share_deny, stp)) {
6357 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
6358 stp->st_deny_bmap, od->od_share_deny);
6359 goto put_stateid;
6360 }
6361 nfs4_stateid_downgrade(stp, od->od_share_access);
6362 reset_union_bmap_deny(od->od_share_deny, stp);
6363 nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
6364 status = nfs_ok;
6365put_stateid:
6366 mutex_unlock(&stp->st_mutex);
6367 nfs4_put_stid(&stp->st_stid);
6368out:
6369 nfsd4_bump_seqid(cstate, status);
6370 return status;
6371}
6372
6373static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
6374{
6375 struct nfs4_client *clp = s->st_stid.sc_client;
6376 bool unhashed;
6377 LIST_HEAD(reaplist);
6378
6379 spin_lock(&clp->cl_lock);
6380 unhashed = unhash_open_stateid(s, &reaplist);
6381
6382 if (clp->cl_minorversion) {
6383 if (unhashed)
6384 put_ol_stateid_locked(s, &reaplist);
6385 spin_unlock(&clp->cl_lock);
6386 free_ol_stateid_reaplist(&reaplist);
6387 } else {
6388 spin_unlock(&clp->cl_lock);
6389 free_ol_stateid_reaplist(&reaplist);
6390 if (unhashed)
6391 move_to_close_lru(s, clp->net);
6392 }
6393}
6394
6395
6396
6397
6398__be32
6399nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6400 union nfsd4_op_u *u)
6401{
6402 struct nfsd4_close *close = &u->close;
6403 __be32 status;
6404 struct nfs4_ol_stateid *stp;
6405 struct net *net = SVC_NET(rqstp);
6406 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6407
6408 dprintk("NFSD: nfsd4_close on file %pd\n",
6409 cstate->current_fh.fh_dentry);
6410
6411 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
6412 &close->cl_stateid,
6413 NFS4_OPEN_STID|NFS4_CLOSED_STID,
6414 &stp, nn);
6415 nfsd4_bump_seqid(cstate, status);
6416 if (status)
6417 goto out;
6418
6419 stp->st_stid.sc_type = NFS4_CLOSED_STID;
6420
6421
6422
6423
6424
6425
6426
6427 nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
6428
6429 nfsd4_close_open_stateid(stp);
6430 mutex_unlock(&stp->st_mutex);
6431
6432
6433
6434
6435
6436
6437
6438
6439 memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));
6440
6441
6442 nfs4_put_stid(&stp->st_stid);
6443out:
6444 return status;
6445}
6446
6447__be32
6448nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6449 union nfsd4_op_u *u)
6450{
6451 struct nfsd4_delegreturn *dr = &u->delegreturn;
6452 struct nfs4_delegation *dp;
6453 stateid_t *stateid = &dr->dr_stateid;
6454 struct nfs4_stid *s;
6455 __be32 status;
6456 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6457
6458 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
6459 return status;
6460
6461 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
6462 if (status)
6463 goto out;
6464 dp = delegstateid(s);
6465 status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));
6466 if (status)
6467 goto put_stateid;
6468
6469 destroy_delegation(dp);
6470put_stateid:
6471 nfs4_put_stid(&dp->dl_stid);
6472out:
6473 return status;
6474}
6475
6476
6477static inline u64
6478last_byte_offset(u64 start, u64 len)
6479{
6480 u64 end;
6481
6482 WARN_ON_ONCE(!len);
6483 end = start + len;
6484 return end > start ? end - 1: NFS4_MAX_UINT64;
6485}
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495static inline void
6496nfs4_transform_lock_offset(struct file_lock *lock)
6497{
6498 if (lock->fl_start < 0)
6499 lock->fl_start = OFFSET_MAX;
6500 if (lock->fl_end < 0)
6501 lock->fl_end = OFFSET_MAX;
6502}
6503
6504static fl_owner_t
6505nfsd4_fl_get_owner(fl_owner_t owner)
6506{
6507 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
6508
6509 nfs4_get_stateowner(&lo->lo_owner);
6510 return owner;
6511}
6512
6513static void
6514nfsd4_fl_put_owner(fl_owner_t owner)
6515{
6516 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
6517
6518 if (lo)
6519 nfs4_put_stateowner(&lo->lo_owner);
6520}
6521
6522static void
6523nfsd4_lm_notify(struct file_lock *fl)
6524{
6525 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner;
6526 struct net *net = lo->lo_owner.so_client->net;
6527 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6528 struct nfsd4_blocked_lock *nbl = container_of(fl,
6529 struct nfsd4_blocked_lock, nbl_lock);
6530 bool queue = false;
6531
6532
6533 spin_lock(&nn->blocked_locks_lock);
6534 if (!list_empty(&nbl->nbl_list)) {
6535 list_del_init(&nbl->nbl_list);
6536 list_del_init(&nbl->nbl_lru);
6537 queue = true;
6538 }
6539 spin_unlock(&nn->blocked_locks_lock);
6540
6541 if (queue) {
6542 trace_nfsd_cb_notify_lock(lo, nbl);
6543 nfsd4_run_cb(&nbl->nbl_cb);
6544 }
6545}
6546
6547static const struct lock_manager_operations nfsd_posix_mng_ops = {
6548 .lm_notify = nfsd4_lm_notify,
6549 .lm_get_owner = nfsd4_fl_get_owner,
6550 .lm_put_owner = nfsd4_fl_put_owner,
6551};
6552
6553static inline void
6554nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
6555{
6556 struct nfs4_lockowner *lo;
6557
6558 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
6559 lo = (struct nfs4_lockowner *) fl->fl_owner;
6560 xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,
6561 GFP_KERNEL);
6562 if (!deny->ld_owner.data)
6563
6564 goto nevermind;
6565 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
6566 } else {
6567nevermind:
6568 deny->ld_owner.len = 0;
6569 deny->ld_owner.data = NULL;
6570 deny->ld_clientid.cl_boot = 0;
6571 deny->ld_clientid.cl_id = 0;
6572 }
6573 deny->ld_start = fl->fl_start;
6574 deny->ld_length = NFS4_MAX_UINT64;
6575 if (fl->fl_end != NFS4_MAX_UINT64)
6576 deny->ld_length = fl->fl_end - fl->fl_start + 1;
6577 deny->ld_type = NFS4_READ_LT;
6578 if (fl->fl_type != F_RDLCK)
6579 deny->ld_type = NFS4_WRITE_LT;
6580}
6581
6582static struct nfs4_lockowner *
6583find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner)
6584{
6585 unsigned int strhashval = ownerstr_hashval(owner);
6586 struct nfs4_stateowner *so;
6587
6588 lockdep_assert_held(&clp->cl_lock);
6589
6590 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
6591 so_strhash) {
6592 if (so->so_is_open_owner)
6593 continue;
6594 if (same_owner_str(so, owner))
6595 return lockowner(nfs4_get_stateowner(so));
6596 }
6597 return NULL;
6598}
6599
6600static struct nfs4_lockowner *
6601find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner)
6602{
6603 struct nfs4_lockowner *lo;
6604
6605 spin_lock(&clp->cl_lock);
6606 lo = find_lockowner_str_locked(clp, owner);
6607 spin_unlock(&clp->cl_lock);
6608 return lo;
6609}
6610
6611static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
6612{
6613 unhash_lockowner_locked(lockowner(sop));
6614}
6615
6616static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
6617{
6618 struct nfs4_lockowner *lo = lockowner(sop);
6619
6620 kmem_cache_free(lockowner_slab, lo);
6621}
6622
6623static const struct nfs4_stateowner_operations lockowner_ops = {
6624 .so_unhash = nfs4_unhash_lockowner,
6625 .so_free = nfs4_free_lockowner,
6626};
6627
6628
6629
6630
6631
6632
6633
6634
6635static struct nfs4_lockowner *
6636alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
6637 struct nfs4_ol_stateid *open_stp,
6638 struct nfsd4_lock *lock)
6639{
6640 struct nfs4_lockowner *lo, *ret;
6641
6642 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
6643 if (!lo)
6644 return NULL;
6645 INIT_LIST_HEAD(&lo->lo_blocked);
6646 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
6647 lo->lo_owner.so_is_open_owner = 0;
6648 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
6649 lo->lo_owner.so_ops = &lockowner_ops;
6650 spin_lock(&clp->cl_lock);
6651 ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);
6652 if (ret == NULL) {
6653 list_add(&lo->lo_owner.so_strhash,
6654 &clp->cl_ownerstr_hashtbl[strhashval]);
6655 ret = lo;
6656 } else
6657 nfs4_free_stateowner(&lo->lo_owner);
6658
6659 spin_unlock(&clp->cl_lock);
6660 return ret;
6661}
6662
6663static struct nfs4_ol_stateid *
6664find_lock_stateid(const struct nfs4_lockowner *lo,
6665 const struct nfs4_ol_stateid *ost)
6666{
6667 struct nfs4_ol_stateid *lst;
6668
6669 lockdep_assert_held(&ost->st_stid.sc_client->cl_lock);
6670
6671
6672 if (!nfs4_ol_stateid_unhashed(ost))
6673 list_for_each_entry(lst, &ost->st_locks, st_locks) {
6674 if (lst->st_stateowner == &lo->lo_owner) {
6675 refcount_inc(&lst->st_stid.sc_count);
6676 return lst;
6677 }
6678 }
6679 return NULL;
6680}
6681
6682static struct nfs4_ol_stateid *
6683init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
6684 struct nfs4_file *fp, struct inode *inode,
6685 struct nfs4_ol_stateid *open_stp)
6686{
6687 struct nfs4_client *clp = lo->lo_owner.so_client;
6688 struct nfs4_ol_stateid *retstp;
6689
6690 mutex_init(&stp->st_mutex);
6691 mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);
6692retry:
6693 spin_lock(&clp->cl_lock);
6694 if (nfs4_ol_stateid_unhashed(open_stp))
6695 goto out_close;
6696 retstp = find_lock_stateid(lo, open_stp);
6697 if (retstp)
6698 goto out_found;
6699 refcount_inc(&stp->st_stid.sc_count);
6700 stp->st_stid.sc_type = NFS4_LOCK_STID;
6701 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
6702 get_nfs4_file(fp);
6703 stp->st_stid.sc_file = fp;
6704 stp->st_access_bmap = 0;
6705 stp->st_deny_bmap = open_stp->st_deny_bmap;
6706 stp->st_openstp = open_stp;
6707 spin_lock(&fp->fi_lock);
6708 list_add(&stp->st_locks, &open_stp->st_locks);
6709 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
6710 list_add(&stp->st_perfile, &fp->fi_stateids);
6711 spin_unlock(&fp->fi_lock);
6712 spin_unlock(&clp->cl_lock);
6713 return stp;
6714out_found:
6715 spin_unlock(&clp->cl_lock);
6716 if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
6717 nfs4_put_stid(&retstp->st_stid);
6718 goto retry;
6719 }
6720
6721 mutex_unlock(&stp->st_mutex);
6722 return retstp;
6723out_close:
6724 spin_unlock(&clp->cl_lock);
6725 mutex_unlock(&stp->st_mutex);
6726 return NULL;
6727}
6728
6729static struct nfs4_ol_stateid *
6730find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
6731 struct inode *inode, struct nfs4_ol_stateid *ost,
6732 bool *new)
6733{
6734 struct nfs4_stid *ns = NULL;
6735 struct nfs4_ol_stateid *lst;
6736 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
6737 struct nfs4_client *clp = oo->oo_owner.so_client;
6738
6739 *new = false;
6740 spin_lock(&clp->cl_lock);
6741 lst = find_lock_stateid(lo, ost);
6742 spin_unlock(&clp->cl_lock);
6743 if (lst != NULL) {
6744 if (nfsd4_lock_ol_stateid(lst) == nfs_ok)
6745 goto out;
6746 nfs4_put_stid(&lst->st_stid);
6747 }
6748 ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid);
6749 if (ns == NULL)
6750 return NULL;
6751
6752 lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost);
6753 if (lst == openlockstateid(ns))
6754 *new = true;
6755 else
6756 nfs4_put_stid(ns);
6757out:
6758 return lst;
6759}
6760
6761static int
6762check_lock_length(u64 offset, u64 length)
6763{
6764 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
6765 (length > ~offset)));
6766}
6767
6768static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
6769{
6770 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
6771
6772 lockdep_assert_held(&fp->fi_lock);
6773
6774 if (test_access(access, lock_stp))
6775 return;
6776 __nfs4_file_get_access(fp, access);
6777 set_access(access, lock_stp);
6778}
6779
6780static __be32
6781lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
6782 struct nfs4_ol_stateid *ost,
6783 struct nfsd4_lock *lock,
6784 struct nfs4_ol_stateid **plst, bool *new)
6785{
6786 __be32 status;
6787 struct nfs4_file *fi = ost->st_stid.sc_file;
6788 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
6789 struct nfs4_client *cl = oo->oo_owner.so_client;
6790 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
6791 struct nfs4_lockowner *lo;
6792 struct nfs4_ol_stateid *lst;
6793 unsigned int strhashval;
6794
6795 lo = find_lockowner_str(cl, &lock->lk_new_owner);
6796 if (!lo) {
6797 strhashval = ownerstr_hashval(&lock->lk_new_owner);
6798 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
6799 if (lo == NULL)
6800 return nfserr_jukebox;
6801 } else {
6802
6803 status = nfserr_bad_seqid;
6804 if (!cstate->minorversion &&
6805 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
6806 goto out;
6807 }
6808
6809 lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
6810 if (lst == NULL) {
6811 status = nfserr_jukebox;
6812 goto out;
6813 }
6814
6815 status = nfs_ok;
6816 *plst = lst;
6817out:
6818 nfs4_put_stateowner(&lo->lo_owner);
6819 return status;
6820}
6821
6822
6823
6824
6825__be32
6826nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6827 union nfsd4_op_u *u)
6828{
6829 struct nfsd4_lock *lock = &u->lock;
6830 struct nfs4_openowner *open_sop = NULL;
6831 struct nfs4_lockowner *lock_sop = NULL;
6832 struct nfs4_ol_stateid *lock_stp = NULL;
6833 struct nfs4_ol_stateid *open_stp = NULL;
6834 struct nfs4_file *fp;
6835 struct nfsd_file *nf = NULL;
6836 struct nfsd4_blocked_lock *nbl = NULL;
6837 struct file_lock *file_lock = NULL;
6838 struct file_lock *conflock = NULL;
6839 struct super_block *sb;
6840 __be32 status = 0;
6841 int lkflg;
6842 int err;
6843 bool new = false;
6844 unsigned char fl_type;
6845 unsigned int fl_flags = FL_POSIX;
6846 struct net *net = SVC_NET(rqstp);
6847 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6848
6849 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
6850 (long long) lock->lk_offset,
6851 (long long) lock->lk_length);
6852
6853 if (check_lock_length(lock->lk_offset, lock->lk_length))
6854 return nfserr_inval;
6855
6856 if ((status = fh_verify(rqstp, &cstate->current_fh,
6857 S_IFREG, NFSD_MAY_LOCK))) {
6858 dprintk("NFSD: nfsd4_lock: permission denied!\n");
6859 return status;
6860 }
6861 sb = cstate->current_fh.fh_dentry->d_sb;
6862
6863 if (lock->lk_is_new) {
6864 if (nfsd4_has_session(cstate))
6865
6866 memcpy(&lock->lk_new_clientid,
6867 &cstate->clp->cl_clientid,
6868 sizeof(clientid_t));
6869
6870
6871 status = nfs4_preprocess_confirmed_seqid_op(cstate,
6872 lock->lk_new_open_seqid,
6873 &lock->lk_new_open_stateid,
6874 &open_stp, nn);
6875 if (status)
6876 goto out;
6877 mutex_unlock(&open_stp->st_mutex);
6878 open_sop = openowner(open_stp->st_stateowner);
6879 status = nfserr_bad_stateid;
6880 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
6881 &lock->lk_new_clientid))
6882 goto out;
6883 status = lookup_or_create_lock_state(cstate, open_stp, lock,
6884 &lock_stp, &new);
6885 } else {
6886 status = nfs4_preprocess_seqid_op(cstate,
6887 lock->lk_old_lock_seqid,
6888 &lock->lk_old_lock_stateid,
6889 NFS4_LOCK_STID, &lock_stp, nn);
6890 }
6891 if (status)
6892 goto out;
6893 lock_sop = lockowner(lock_stp->st_stateowner);
6894
6895 lkflg = setlkflg(lock->lk_type);
6896 status = nfs4_check_openmode(lock_stp, lkflg);
6897 if (status)
6898 goto out;
6899
6900 status = nfserr_grace;
6901 if (locks_in_grace(net) && !lock->lk_reclaim)
6902 goto out;
6903 status = nfserr_no_grace;
6904 if (!locks_in_grace(net) && lock->lk_reclaim)
6905 goto out;
6906
6907 if (lock->lk_reclaim)
6908 fl_flags |= FL_RECLAIM;
6909
6910 fp = lock_stp->st_stid.sc_file;
6911 switch (lock->lk_type) {
6912 case NFS4_READW_LT:
6913 if (nfsd4_has_session(cstate) &&
6914 !(sb->s_export_op->flags & EXPORT_OP_SYNC_LOCKS))
6915 fl_flags |= FL_SLEEP;
6916 fallthrough;
6917 case NFS4_READ_LT:
6918 spin_lock(&fp->fi_lock);
6919 nf = find_readable_file_locked(fp);
6920 if (nf)
6921 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
6922 spin_unlock(&fp->fi_lock);
6923 fl_type = F_RDLCK;
6924 break;
6925 case NFS4_WRITEW_LT:
6926 if (nfsd4_has_session(cstate) &&
6927 !(sb->s_export_op->flags & EXPORT_OP_SYNC_LOCKS))
6928 fl_flags |= FL_SLEEP;
6929 fallthrough;
6930 case NFS4_WRITE_LT:
6931 spin_lock(&fp->fi_lock);
6932 nf = find_writeable_file_locked(fp);
6933 if (nf)
6934 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
6935 spin_unlock(&fp->fi_lock);
6936 fl_type = F_WRLCK;
6937 break;
6938 default:
6939 status = nfserr_inval;
6940 goto out;
6941 }
6942
6943 if (!nf) {
6944 status = nfserr_openmode;
6945 goto out;
6946 }
6947
6948 nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
6949 if (!nbl) {
6950 dprintk("NFSD: %s: unable to allocate block!\n", __func__);
6951 status = nfserr_jukebox;
6952 goto out;
6953 }
6954
6955 file_lock = &nbl->nbl_lock;
6956 file_lock->fl_type = fl_type;
6957 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
6958 file_lock->fl_pid = current->tgid;
6959 file_lock->fl_file = nf->nf_file;
6960 file_lock->fl_flags = fl_flags;
6961 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6962 file_lock->fl_start = lock->lk_offset;
6963 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
6964 nfs4_transform_lock_offset(file_lock);
6965
6966 conflock = locks_alloc_lock();
6967 if (!conflock) {
6968 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6969 status = nfserr_jukebox;
6970 goto out;
6971 }
6972
6973 if (fl_flags & FL_SLEEP) {
6974 nbl->nbl_time = ktime_get_boottime_seconds();
6975 spin_lock(&nn->blocked_locks_lock);
6976 list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
6977 list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
6978 spin_unlock(&nn->blocked_locks_lock);
6979 }
6980
6981 err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock);
6982 switch (err) {
6983 case 0:
6984 nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);
6985 status = 0;
6986 if (lock->lk_reclaim)
6987 nn->somebody_reclaimed = true;
6988 break;
6989 case FILE_LOCK_DEFERRED:
6990 nbl = NULL;
6991 fallthrough;
6992 case -EAGAIN:
6993 status = nfserr_denied;
6994 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
6995 nfs4_set_lock_denied(conflock, &lock->lk_denied);
6996 break;
6997 case -EDEADLK:
6998 status = nfserr_deadlock;
6999 break;
7000 default:
7001 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
7002 status = nfserrno(err);
7003 break;
7004 }
7005out:
7006 if (nbl) {
7007
7008 if (fl_flags & FL_SLEEP) {
7009 spin_lock(&nn->blocked_locks_lock);
7010 list_del_init(&nbl->nbl_list);
7011 list_del_init(&nbl->nbl_lru);
7012 spin_unlock(&nn->blocked_locks_lock);
7013 }
7014 free_blocked_lock(nbl);
7015 }
7016 if (nf)
7017 nfsd_file_put(nf);
7018 if (lock_stp) {
7019
7020 if (cstate->replay_owner &&
7021 cstate->replay_owner != &lock_sop->lo_owner &&
7022 seqid_mutating_err(ntohl(status)))
7023 lock_sop->lo_owner.so_seqid++;
7024
7025
7026
7027
7028
7029 if (status && new)
7030 release_lock_stateid(lock_stp);
7031
7032 mutex_unlock(&lock_stp->st_mutex);
7033
7034 nfs4_put_stid(&lock_stp->st_stid);
7035 }
7036 if (open_stp)
7037 nfs4_put_stid(&open_stp->st_stid);
7038 nfsd4_bump_seqid(cstate, status);
7039 if (conflock)
7040 locks_free_lock(conflock);
7041 return status;
7042}
7043
7044
7045
7046
7047
7048
7049static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
7050{
7051 struct nfsd_file *nf;
7052 __be32 err;
7053
7054 err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf);
7055 if (err)
7056 return err;
7057 fh_lock(fhp);
7058 err = nfserrno(nfsd_open_break_lease(fhp->fh_dentry->d_inode,
7059 NFSD_MAY_READ));
7060 if (err)
7061 goto out;
7062 lock->fl_file = nf->nf_file;
7063 err = nfserrno(vfs_test_lock(nf->nf_file, lock));
7064 lock->fl_file = NULL;
7065out:
7066 fh_unlock(fhp);
7067 nfsd_file_put(nf);
7068 return err;
7069}
7070
7071
7072
7073
7074__be32
7075nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
7076 union nfsd4_op_u *u)
7077{
7078 struct nfsd4_lockt *lockt = &u->lockt;
7079 struct file_lock *file_lock = NULL;
7080 struct nfs4_lockowner *lo = NULL;
7081 __be32 status;
7082 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
7083
7084 if (locks_in_grace(SVC_NET(rqstp)))
7085 return nfserr_grace;
7086
7087 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
7088 return nfserr_inval;
7089
7090 if (!nfsd4_has_session(cstate)) {
7091 status = set_client(&lockt->lt_clientid, cstate, nn);
7092 if (status)
7093 goto out;
7094 }
7095
7096 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
7097 goto out;
7098
7099 file_lock = locks_alloc_lock();
7100 if (!file_lock) {
7101 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
7102 status = nfserr_jukebox;
7103 goto out;
7104 }
7105
7106 switch (lockt->lt_type) {
7107 case NFS4_READ_LT:
7108 case NFS4_READW_LT:
7109 file_lock->fl_type = F_RDLCK;
7110 break;
7111 case NFS4_WRITE_LT:
7112 case NFS4_WRITEW_LT:
7113 file_lock->fl_type = F_WRLCK;
7114 break;
7115 default:
7116 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
7117 status = nfserr_inval;
7118 goto out;
7119 }
7120
7121 lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);
7122 if (lo)
7123 file_lock->fl_owner = (fl_owner_t)lo;
7124 file_lock->fl_pid = current->tgid;
7125 file_lock->fl_flags = FL_POSIX;
7126
7127 file_lock->fl_start = lockt->lt_offset;
7128 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
7129
7130 nfs4_transform_lock_offset(file_lock);
7131
7132 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
7133 if (status)
7134 goto out;
7135
7136 if (file_lock->fl_type != F_UNLCK) {
7137 status = nfserr_denied;
7138 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
7139 }
7140out:
7141 if (lo)
7142 nfs4_put_stateowner(&lo->lo_owner);
7143 if (file_lock)
7144 locks_free_lock(file_lock);
7145 return status;
7146}
7147
7148__be32
7149nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
7150 union nfsd4_op_u *u)
7151{
7152 struct nfsd4_locku *locku = &u->locku;
7153 struct nfs4_ol_stateid *stp;
7154 struct nfsd_file *nf = NULL;
7155 struct file_lock *file_lock = NULL;
7156 __be32 status;
7157 int err;
7158 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
7159
7160 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
7161 (long long) locku->lu_offset,
7162 (long long) locku->lu_length);
7163
7164 if (check_lock_length(locku->lu_offset, locku->lu_length))
7165 return nfserr_inval;
7166
7167 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
7168 &locku->lu_stateid, NFS4_LOCK_STID,
7169 &stp, nn);
7170 if (status)
7171 goto out;
7172 nf = find_any_file(stp->st_stid.sc_file);
7173 if (!nf) {
7174 status = nfserr_lock_range;
7175 goto put_stateid;
7176 }
7177 file_lock = locks_alloc_lock();
7178 if (!file_lock) {
7179 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
7180 status = nfserr_jukebox;
7181 goto put_file;
7182 }
7183
7184 file_lock->fl_type = F_UNLCK;
7185 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
7186 file_lock->fl_pid = current->tgid;
7187 file_lock->fl_file = nf->nf_file;
7188 file_lock->fl_flags = FL_POSIX;
7189 file_lock->fl_lmops = &nfsd_posix_mng_ops;
7190 file_lock->fl_start = locku->lu_offset;
7191
7192 file_lock->fl_end = last_byte_offset(locku->lu_offset,
7193 locku->lu_length);
7194 nfs4_transform_lock_offset(file_lock);
7195
7196 err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL);
7197 if (err) {
7198 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
7199 goto out_nfserr;
7200 }
7201 nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);
7202put_file:
7203 nfsd_file_put(nf);
7204put_stateid:
7205 mutex_unlock(&stp->st_mutex);
7206 nfs4_put_stid(&stp->st_stid);
7207out:
7208 nfsd4_bump_seqid(cstate, status);
7209 if (file_lock)
7210 locks_free_lock(file_lock);
7211 return status;
7212
7213out_nfserr:
7214 status = nfserrno(err);
7215 goto put_file;
7216}
7217
7218
7219
7220
7221
7222
7223static bool
7224check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
7225{
7226 struct file_lock *fl;
7227 int status = false;
7228 struct nfsd_file *nf = find_any_file(fp);
7229 struct inode *inode;
7230 struct file_lock_context *flctx;
7231
7232 if (!nf) {
7233
7234 WARN_ON_ONCE(1);
7235 return status;
7236 }
7237
7238 inode = locks_inode(nf->nf_file);
7239 flctx = inode->i_flctx;
7240
7241 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
7242 spin_lock(&flctx->flc_lock);
7243 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
7244 if (fl->fl_owner == (fl_owner_t)lowner) {
7245 status = true;
7246 break;
7247 }
7248 }
7249 spin_unlock(&flctx->flc_lock);
7250 }
7251 nfsd_file_put(nf);
7252 return status;
7253}
7254
7255__be32
7256nfsd4_release_lockowner(struct svc_rqst *rqstp,
7257 struct nfsd4_compound_state *cstate,
7258 union nfsd4_op_u *u)
7259{
7260 struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
7261 clientid_t *clid = &rlockowner->rl_clientid;
7262 struct nfs4_stateowner *sop;
7263 struct nfs4_lockowner *lo = NULL;
7264 struct nfs4_ol_stateid *stp;
7265 struct xdr_netobj *owner = &rlockowner->rl_owner;
7266 unsigned int hashval = ownerstr_hashval(owner);
7267 __be32 status;
7268 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
7269 struct nfs4_client *clp;
7270 LIST_HEAD (reaplist);
7271
7272 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
7273 clid->cl_boot, clid->cl_id);
7274
7275 status = set_client(clid, cstate, nn);
7276 if (status)
7277 return status;
7278
7279 clp = cstate->clp;
7280
7281 spin_lock(&clp->cl_lock);
7282 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
7283 so_strhash) {
7284
7285 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
7286 continue;
7287
7288
7289 lo = lockowner(sop);
7290 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
7291 if (check_for_locks(stp->st_stid.sc_file, lo)) {
7292 status = nfserr_locks_held;
7293 spin_unlock(&clp->cl_lock);
7294 return status;
7295 }
7296 }
7297
7298 nfs4_get_stateowner(sop);
7299 break;
7300 }
7301 if (!lo) {
7302 spin_unlock(&clp->cl_lock);
7303 return status;
7304 }
7305
7306 unhash_lockowner_locked(lo);
7307 while (!list_empty(&lo->lo_owner.so_stateids)) {
7308 stp = list_first_entry(&lo->lo_owner.so_stateids,
7309 struct nfs4_ol_stateid,
7310 st_perstateowner);
7311 WARN_ON(!unhash_lock_stateid(stp));
7312 put_ol_stateid_locked(stp, &reaplist);
7313 }
7314 spin_unlock(&clp->cl_lock);
7315 free_ol_stateid_reaplist(&reaplist);
7316 remove_blocked_locks(lo);
7317 nfs4_put_stateowner(&lo->lo_owner);
7318
7319 return status;
7320}
7321
7322static inline struct nfs4_client_reclaim *
7323alloc_reclaim(void)
7324{
7325 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
7326}
7327
7328bool
7329nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn)
7330{
7331 struct nfs4_client_reclaim *crp;
7332
7333 crp = nfsd4_find_reclaim_client(name, nn);
7334 return (crp && crp->cr_clp);
7335}
7336
7337
7338
7339
7340
7341
7342
7343struct nfs4_client_reclaim *
7344nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash,
7345 struct nfsd_net *nn)
7346{
7347 unsigned int strhashval;
7348 struct nfs4_client_reclaim *crp;
7349
7350 crp = alloc_reclaim();
7351 if (crp) {
7352 strhashval = clientstr_hashval(name);
7353 INIT_LIST_HEAD(&crp->cr_strhash);
7354 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
7355 crp->cr_name.data = name.data;
7356 crp->cr_name.len = name.len;
7357 crp->cr_princhash.data = princhash.data;
7358 crp->cr_princhash.len = princhash.len;
7359 crp->cr_clp = NULL;
7360 nn->reclaim_str_hashtbl_size++;
7361 }
7362 return crp;
7363}
7364
7365void
7366nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
7367{
7368 list_del(&crp->cr_strhash);
7369 kfree(crp->cr_name.data);
7370 kfree(crp->cr_princhash.data);
7371 kfree(crp);
7372 nn->reclaim_str_hashtbl_size--;
7373}
7374
7375void
7376nfs4_release_reclaim(struct nfsd_net *nn)
7377{
7378 struct nfs4_client_reclaim *crp = NULL;
7379 int i;
7380
7381 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7382 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
7383 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
7384 struct nfs4_client_reclaim, cr_strhash);
7385 nfs4_remove_reclaim_record(crp, nn);
7386 }
7387 }
7388 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
7389}
7390
7391
7392
7393struct nfs4_client_reclaim *
7394nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn)
7395{
7396 unsigned int strhashval;
7397 struct nfs4_client_reclaim *crp = NULL;
7398
7399 strhashval = clientstr_hashval(name);
7400 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
7401 if (compare_blob(&crp->cr_name, &name) == 0) {
7402 return crp;
7403 }
7404 }
7405 return NULL;
7406}
7407
7408__be32
7409nfs4_check_open_reclaim(struct nfs4_client *clp)
7410{
7411 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))
7412 return nfserr_no_grace;
7413
7414 if (nfsd4_client_record_check(clp))
7415 return nfserr_reclaim_bad;
7416
7417 return nfs_ok;
7418}
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429static void
7430set_max_delegations(void)
7431{
7432
7433
7434
7435
7436
7437
7438 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
7439}
7440
7441static int nfs4_state_create_net(struct net *net)
7442{
7443 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7444 int i;
7445
7446 nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
7447 sizeof(struct list_head),
7448 GFP_KERNEL);
7449 if (!nn->conf_id_hashtbl)
7450 goto err;
7451 nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
7452 sizeof(struct list_head),
7453 GFP_KERNEL);
7454 if (!nn->unconf_id_hashtbl)
7455 goto err_unconf_id;
7456 nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE,
7457 sizeof(struct list_head),
7458 GFP_KERNEL);
7459 if (!nn->sessionid_hashtbl)
7460 goto err_sessionid;
7461
7462 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7463 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
7464 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
7465 }
7466 for (i = 0; i < SESSION_HASH_SIZE; i++)
7467 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
7468 nn->conf_name_tree = RB_ROOT;
7469 nn->unconf_name_tree = RB_ROOT;
7470 nn->boot_time = ktime_get_real_seconds();
7471 nn->grace_ended = false;
7472 nn->nfsd4_manager.block_opens = true;
7473 INIT_LIST_HEAD(&nn->nfsd4_manager.list);
7474 INIT_LIST_HEAD(&nn->client_lru);
7475 INIT_LIST_HEAD(&nn->close_lru);
7476 INIT_LIST_HEAD(&nn->del_recall_lru);
7477 spin_lock_init(&nn->client_lock);
7478 spin_lock_init(&nn->s2s_cp_lock);
7479 idr_init(&nn->s2s_cp_stateids);
7480
7481 spin_lock_init(&nn->blocked_locks_lock);
7482 INIT_LIST_HEAD(&nn->blocked_locks_lru);
7483
7484 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
7485 get_net(net);
7486
7487 return 0;
7488
7489err_sessionid:
7490 kfree(nn->unconf_id_hashtbl);
7491err_unconf_id:
7492 kfree(nn->conf_id_hashtbl);
7493err:
7494 return -ENOMEM;
7495}
7496
7497static void
7498nfs4_state_destroy_net(struct net *net)
7499{
7500 int i;
7501 struct nfs4_client *clp = NULL;
7502 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7503
7504 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7505 while (!list_empty(&nn->conf_id_hashtbl[i])) {
7506 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7507 destroy_client(clp);
7508 }
7509 }
7510
7511 WARN_ON(!list_empty(&nn->blocked_locks_lru));
7512
7513 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
7514 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
7515 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
7516 destroy_client(clp);
7517 }
7518 }
7519
7520 kfree(nn->sessionid_hashtbl);
7521 kfree(nn->unconf_id_hashtbl);
7522 kfree(nn->conf_id_hashtbl);
7523 put_net(net);
7524}
7525
7526int
7527nfs4_state_start_net(struct net *net)
7528{
7529 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7530 int ret;
7531
7532 ret = nfs4_state_create_net(net);
7533 if (ret)
7534 return ret;
7535 locks_start_grace(net, &nn->nfsd4_manager);
7536 nfsd4_client_tracking_init(net);
7537 if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
7538 goto skip_grace;
7539 printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n",
7540 nn->nfsd4_grace, net->ns.inum);
7541 trace_nfsd_grace_start(nn);
7542 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
7543 return 0;
7544
7545skip_grace:
7546 printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n",
7547 net->ns.inum);
7548 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);
7549 nfsd4_end_grace(nn);
7550 return 0;
7551}
7552
7553
7554
7555int
7556nfs4_state_start(void)
7557{
7558 int ret;
7559
7560 laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
7561 if (laundry_wq == NULL) {
7562 ret = -ENOMEM;
7563 goto out;
7564 }
7565 ret = nfsd4_create_callback_queue();
7566 if (ret)
7567 goto out_free_laundry;
7568
7569 set_max_delegations();
7570 return 0;
7571
7572out_free_laundry:
7573 destroy_workqueue(laundry_wq);
7574out:
7575 return ret;
7576}
7577
7578void
7579nfs4_state_shutdown_net(struct net *net)
7580{
7581 struct nfs4_delegation *dp = NULL;
7582 struct list_head *pos, *next, reaplist;
7583 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7584
7585 cancel_delayed_work_sync(&nn->laundromat_work);
7586 locks_end_grace(&nn->nfsd4_manager);
7587
7588 INIT_LIST_HEAD(&reaplist);
7589 spin_lock(&state_lock);
7590 list_for_each_safe(pos, next, &nn->del_recall_lru) {
7591 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7592 WARN_ON(!unhash_delegation_locked(dp));
7593 list_add(&dp->dl_recall_lru, &reaplist);
7594 }
7595 spin_unlock(&state_lock);
7596 list_for_each_safe(pos, next, &reaplist) {
7597 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7598 list_del_init(&dp->dl_recall_lru);
7599 destroy_unhashed_deleg(dp);
7600 }
7601
7602 nfsd4_client_tracking_exit(net);
7603 nfs4_state_destroy_net(net);
7604#ifdef CONFIG_NFSD_V4_2_INTER_SSC
7605 nfsd4_ssc_shutdown_umount(nn);
7606#endif
7607}
7608
7609void
7610nfs4_state_shutdown(void)
7611{
7612 destroy_workqueue(laundry_wq);
7613 nfsd4_destroy_callback_queue();
7614}
7615
7616static void
7617get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7618{
7619 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) &&
7620 CURRENT_STATEID(stateid))
7621 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
7622}
7623
7624static void
7625put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7626{
7627 if (cstate->minorversion) {
7628 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
7629 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
7630 }
7631}
7632
7633void
7634clear_current_stateid(struct nfsd4_compound_state *cstate)
7635{
7636 CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
7637}
7638
7639
7640
7641
7642void
7643nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate,
7644 union nfsd4_op_u *u)
7645{
7646 put_stateid(cstate, &u->open_downgrade.od_stateid);
7647}
7648
7649void
7650nfsd4_set_openstateid(struct nfsd4_compound_state *cstate,
7651 union nfsd4_op_u *u)
7652{
7653 put_stateid(cstate, &u->open.op_stateid);
7654}
7655
7656void
7657nfsd4_set_closestateid(struct nfsd4_compound_state *cstate,
7658 union nfsd4_op_u *u)
7659{
7660 put_stateid(cstate, &u->close.cl_stateid);
7661}
7662
7663void
7664nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate,
7665 union nfsd4_op_u *u)
7666{
7667 put_stateid(cstate, &u->lock.lk_resp_stateid);
7668}
7669
7670
7671
7672
7673
7674void
7675nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate,
7676 union nfsd4_op_u *u)
7677{
7678 get_stateid(cstate, &u->open_downgrade.od_stateid);
7679}
7680
7681void
7682nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate,
7683 union nfsd4_op_u *u)
7684{
7685 get_stateid(cstate, &u->delegreturn.dr_stateid);
7686}
7687
7688void
7689nfsd4_get_freestateid(struct nfsd4_compound_state *cstate,
7690 union nfsd4_op_u *u)
7691{
7692 get_stateid(cstate, &u->free_stateid.fr_stateid);
7693}
7694
7695void
7696nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate,
7697 union nfsd4_op_u *u)
7698{
7699 get_stateid(cstate, &u->setattr.sa_stateid);
7700}
7701
7702void
7703nfsd4_get_closestateid(struct nfsd4_compound_state *cstate,
7704 union nfsd4_op_u *u)
7705{
7706 get_stateid(cstate, &u->close.cl_stateid);
7707}
7708
7709void
7710nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate,
7711 union nfsd4_op_u *u)
7712{
7713 get_stateid(cstate, &u->locku.lu_stateid);
7714}
7715
7716void
7717nfsd4_get_readstateid(struct nfsd4_compound_state *cstate,
7718 union nfsd4_op_u *u)
7719{
7720 get_stateid(cstate, &u->read.rd_stateid);
7721}
7722
7723void
7724nfsd4_get_writestateid(struct nfsd4_compound_state *cstate,
7725 union nfsd4_op_u *u)
7726{
7727 get_stateid(cstate, &u->write.wr_stateid);
7728}
7729