1
2#ifndef _FS_CEPH_SUPER_H
3#define _FS_CEPH_SUPER_H
4
5#include <linux/ceph/ceph_debug.h>
6
7#include <asm/unaligned.h>
8#include <linux/backing-dev.h>
9#include <linux/completion.h>
10#include <linux/exportfs.h>
11#include <linux/fs.h>
12#include <linux/mempool.h>
13#include <linux/pagemap.h>
14#include <linux/wait.h>
15#include <linux/writeback.h>
16#include <linux/slab.h>
17#include <linux/posix_acl.h>
18#include <linux/refcount.h>
19
20#include <linux/ceph/libceph.h>
21
22#ifdef CONFIG_CEPH_FSCACHE
23#include <linux/fscache.h>
24#endif
25
26
27#define CEPH_SUPER_MAGIC 0x00c36400
28
29
30
31#define CEPH_BLOCK_SHIFT 22
32#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
33
34#define CEPH_MOUNT_OPT_DIRSTAT (1<<4)
35#define CEPH_MOUNT_OPT_RBYTES (1<<5)
36#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7)
37#define CEPH_MOUNT_OPT_INO32 (1<<8)
38#define CEPH_MOUNT_OPT_DCACHE (1<<9)
39#define CEPH_MOUNT_OPT_FSCACHE (1<<10)
40#define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11)
41#define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12)
42
43#define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
44
45#define ceph_set_mount_opt(fsc, opt) \
46 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
47#define ceph_test_mount_opt(fsc, opt) \
48 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
49
50
51#define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
52
53
54#define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
55#define CEPH_RASIZE_DEFAULT (8192*1024)
56#define CEPH_MAX_READDIR_DEFAULT 1024
57#define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
58#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
59
60
61
62
63
64
65
66#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5
67#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60
68
69struct ceph_mount_options {
70 int flags;
71 int sb_flags;
72
73 int wsize;
74 int rsize;
75 int rasize;
76 int congestion_kb;
77 int caps_wanted_delay_min, caps_wanted_delay_max;
78 int max_readdir;
79 int max_readdir_bytes;
80
81
82
83
84
85
86 char *snapdir_name;
87 char *mds_namespace;
88 char *server_path;
89 char *fscache_uniq;
90};
91
92struct ceph_fs_client {
93 struct super_block *sb;
94
95 struct ceph_mount_options *mount_options;
96 struct ceph_client *client;
97
98 unsigned long mount_state;
99 int min_caps;
100
101 struct ceph_mds_client *mdsc;
102
103
104 mempool_t *wb_pagevec_pool;
105 struct workqueue_struct *wb_wq;
106 struct workqueue_struct *pg_inv_wq;
107 struct workqueue_struct *trunc_wq;
108 atomic_long_t writeback_count;
109
110#ifdef CONFIG_DEBUG_FS
111 struct dentry *debugfs_dentry_lru, *debugfs_caps;
112 struct dentry *debugfs_congestion_kb;
113 struct dentry *debugfs_bdi;
114 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
115 struct dentry *debugfs_mds_sessions;
116#endif
117
118#ifdef CONFIG_CEPH_FSCACHE
119 struct fscache_cookie *fscache;
120#endif
121};
122
123
124
125
126
127
128
129
130
131
132
133
134struct ceph_cap {
135 struct ceph_inode_info *ci;
136 struct rb_node ci_node;
137 struct ceph_mds_session *session;
138 struct list_head session_caps;
139 u64 cap_id;
140 union {
141
142 struct {
143 int issued;
144 int implemented;
145
146 int mds, mds_wanted;
147 };
148
149 struct {
150 u64 cap_ino;
151 int queue_release;
152 };
153 };
154 u32 seq, issue_seq, mseq;
155 u32 cap_gen;
156 unsigned long last_used;
157 struct list_head caps_item;
158};
159
160#define CHECK_CAPS_NODELAY 1
161#define CHECK_CAPS_AUTHONLY 2
162#define CHECK_CAPS_FLUSH 4
163
164struct ceph_cap_flush {
165 u64 tid;
166 int caps;
167 bool wake;
168 struct list_head g_list;
169 struct list_head i_list;
170};
171
172
173
174
175
176
177struct ceph_cap_snap {
178 refcount_t nref;
179 struct list_head ci_item;
180
181 struct ceph_cap_flush cap_flush;
182
183 u64 follows;
184 int issued, dirty;
185 struct ceph_snap_context *context;
186
187 umode_t mode;
188 kuid_t uid;
189 kgid_t gid;
190
191 struct ceph_buffer *xattr_blob;
192 u64 xattr_version;
193
194 u64 size;
195 struct timespec mtime, atime, ctime;
196 u64 time_warp_seq;
197 u64 truncate_size;
198 u32 truncate_seq;
199 int writing;
200 int dirty_pages;
201 bool inline_data;
202 bool need_flush;
203};
204
205static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
206{
207 if (refcount_dec_and_test(&capsnap->nref)) {
208 if (capsnap->xattr_blob)
209 ceph_buffer_put(capsnap->xattr_blob);
210 kfree(capsnap);
211 }
212}
213
214
215
216
217
218
219
220
221
222#define CEPH_MAX_DIRFRAG_REP 4
223
224struct ceph_inode_frag {
225 struct rb_node node;
226
227
228 u32 frag;
229 int split_by;
230
231
232 int mds;
233 int ndist;
234 int dist[CEPH_MAX_DIRFRAG_REP];
235};
236
237
238
239
240
241struct ceph_inode_xattr {
242 struct rb_node node;
243
244 const char *name;
245 int name_len;
246 const char *val;
247 int val_len;
248 int dirty;
249
250 int should_free_name;
251 int should_free_val;
252};
253
254
255
256
257struct ceph_dentry_info {
258 struct ceph_mds_session *lease_session;
259 u32 lease_gen, lease_shared_gen;
260 u32 lease_seq;
261 unsigned long lease_renew_after, lease_renew_from;
262 struct list_head lru;
263 struct dentry *dentry;
264 unsigned long time;
265 u64 offset;
266};
267
268struct ceph_inode_xattrs_info {
269
270
271
272
273
274
275
276 struct ceph_buffer *blob, *prealloc_blob;
277
278 struct rb_root index;
279 bool dirty;
280 int count;
281 int names_size;
282 int vals_size;
283 u64 version, index_version;
284};
285
286
287
288
289struct ceph_inode_info {
290 struct ceph_vino i_vino;
291
292 spinlock_t i_ceph_lock;
293
294 u64 i_version;
295 u64 i_inline_version;
296 u32 i_time_warp_seq;
297
298 unsigned i_ceph_flags;
299 atomic64_t i_release_count;
300 atomic64_t i_ordered_count;
301 atomic64_t i_complete_seq[2];
302
303 struct ceph_dir_layout i_dir_layout;
304 struct ceph_file_layout i_layout;
305 char *i_symlink;
306
307
308 struct timespec i_rctime;
309 u64 i_rbytes, i_rfiles, i_rsubdirs;
310 u64 i_files, i_subdirs;
311
312 struct rb_root i_fragtree;
313 int i_fragtree_nsplits;
314 struct mutex i_fragtree_mutex;
315
316 struct ceph_inode_xattrs_info i_xattrs;
317
318
319
320 struct rb_root i_caps;
321 struct ceph_cap *i_auth_cap;
322 unsigned i_dirty_caps, i_flushing_caps;
323 struct list_head i_dirty_item, i_flushing_item;
324
325
326
327 struct ceph_cap_flush *i_prealloc_cap_flush;
328 struct list_head i_cap_flush_list;
329 wait_queue_head_t i_cap_wq;
330 unsigned long i_hold_caps_min;
331 unsigned long i_hold_caps_max;
332 struct list_head i_cap_delay_list;
333 struct ceph_cap_reservation i_cap_migration_resv;
334 struct list_head i_cap_snaps;
335 struct ceph_snap_context *i_head_snapc;
336
337 unsigned i_snap_caps;
338
339 int i_nr_by_mode[CEPH_FILE_MODE_BITS];
340
341 struct mutex i_truncate_mutex;
342 u32 i_truncate_seq;
343 u64 i_truncate_size;
344 int i_truncate_pending;
345
346 u64 i_max_size;
347 u64 i_reported_size;
348 u64 i_wanted_max_size;
349 u64 i_requested_max_size;
350
351
352 int i_pin_ref;
353 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
354 int i_wrbuffer_ref, i_wrbuffer_ref_head;
355 u32 i_shared_gen;
356 u32 i_rdcache_gen;
357 u32 i_rdcache_revoking;
358
359 struct list_head i_unsafe_dirops;
360 struct list_head i_unsafe_iops;
361 spinlock_t i_unsafe_lock;
362
363 struct ceph_snap_realm *i_snap_realm;
364 int i_snap_realm_counter;
365 struct list_head i_snap_realm_item;
366 struct list_head i_snap_flush_item;
367
368 struct work_struct i_wb_work;
369 struct work_struct i_pg_inv_work;
370
371 struct work_struct i_vmtruncate_work;
372
373#ifdef CONFIG_CEPH_FSCACHE
374 struct fscache_cookie *fscache;
375 u32 i_fscache_gen;
376#endif
377 struct inode vfs_inode;
378};
379
380static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
381{
382 return container_of(inode, struct ceph_inode_info, vfs_inode);
383}
384
385static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
386{
387 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
388}
389
390static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
391{
392 return (struct ceph_fs_client *)sb->s_fs_info;
393}
394
395static inline struct ceph_vino ceph_vino(struct inode *inode)
396{
397 return ceph_inode(inode)->i_vino;
398}
399
400
401
402
403
404
405
406
407
408static inline u32 ceph_ino_to_ino32(__u64 vino)
409{
410 u32 ino = vino & 0xffffffff;
411 ino ^= vino >> 32;
412 if (!ino)
413 ino = 2;
414 return ino;
415}
416
417
418
419
420static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
421{
422#if BITS_PER_LONG == 32
423 return ceph_ino_to_ino32(vino.ino);
424#else
425 return (ino_t)vino.ino;
426#endif
427}
428
429
430
431
432#if BITS_PER_LONG == 32
433static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
434{
435 return ino;
436}
437#else
438static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
439{
440 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
441 ino = ceph_ino_to_ino32(ino);
442 return ino;
443}
444#endif
445
446
447
448#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
449
450static inline u64 ceph_ino(struct inode *inode)
451{
452 return ceph_inode(inode)->i_vino.ino;
453}
454static inline u64 ceph_snap(struct inode *inode)
455{
456 return ceph_inode(inode)->i_vino.snap;
457}
458
459static inline int ceph_ino_compare(struct inode *inode, void *data)
460{
461 struct ceph_vino *pvino = (struct ceph_vino *)data;
462 struct ceph_inode_info *ci = ceph_inode(inode);
463 return ci->i_vino.ino == pvino->ino &&
464 ci->i_vino.snap == pvino->snap;
465}
466
467static inline struct inode *ceph_find_inode(struct super_block *sb,
468 struct ceph_vino vino)
469{
470 ino_t t = ceph_vino_to_ino(vino);
471 return ilookup5(sb, t, ceph_ino_compare, &vino);
472}
473
474
475
476
477
478#define CEPH_I_DIR_ORDERED (1 << 0)
479#define CEPH_I_NODELAY (1 << 1)
480#define CEPH_I_FLUSH (1 << 2)
481#define CEPH_I_NOFLUSH (1 << 3)
482#define CEPH_I_POOL_PERM (1 << 4)
483#define CEPH_I_POOL_RD (1 << 5)
484#define CEPH_I_POOL_WR (1 << 6)
485#define CEPH_I_SEC_INITED (1 << 7)
486#define CEPH_I_CAP_DROPPED (1 << 8)
487#define CEPH_I_KICK_FLUSH (1 << 9)
488#define CEPH_I_FLUSH_SNAPS (1 << 10)
489#define CEPH_I_ERROR_WRITE (1 << 11)
490
491
492
493
494
495
496
497
498static inline void ceph_set_error_write(struct ceph_inode_info *ci)
499{
500 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
501 spin_lock(&ci->i_ceph_lock);
502 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
503 spin_unlock(&ci->i_ceph_lock);
504 }
505}
506
507static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
508{
509 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
510 spin_lock(&ci->i_ceph_lock);
511 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
512 spin_unlock(&ci->i_ceph_lock);
513 }
514}
515
516static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
517 long long release_count,
518 long long ordered_count)
519{
520 smp_mb__before_atomic();
521 atomic64_set(&ci->i_complete_seq[0], release_count);
522 atomic64_set(&ci->i_complete_seq[1], ordered_count);
523}
524
525static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
526{
527 atomic64_inc(&ci->i_release_count);
528}
529
530static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
531{
532 atomic64_inc(&ci->i_ordered_count);
533}
534
535static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
536{
537 return atomic64_read(&ci->i_complete_seq[0]) ==
538 atomic64_read(&ci->i_release_count);
539}
540
541static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
542{
543 return atomic64_read(&ci->i_complete_seq[0]) ==
544 atomic64_read(&ci->i_release_count) &&
545 atomic64_read(&ci->i_complete_seq[1]) ==
546 atomic64_read(&ci->i_ordered_count);
547}
548
549static inline void ceph_dir_clear_complete(struct inode *inode)
550{
551 __ceph_dir_clear_complete(ceph_inode(inode));
552}
553
554static inline void ceph_dir_clear_ordered(struct inode *inode)
555{
556 __ceph_dir_clear_ordered(ceph_inode(inode));
557}
558
559static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
560{
561 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
562 smp_rmb();
563 return ret;
564}
565
566
567extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
568 u32 f);
569
570
571
572
573
574extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
575 struct ceph_inode_frag *pfrag,
576 int *found);
577
578static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
579{
580 return (struct ceph_dentry_info *)dentry->d_fsdata;
581}
582
583
584
585
586static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
587{
588 return !RB_EMPTY_ROOT(&ci->i_caps);
589}
590
591extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
592extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
593extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
594 struct ceph_cap *cap);
595
596static inline int ceph_caps_issued(struct ceph_inode_info *ci)
597{
598 int issued;
599 spin_lock(&ci->i_ceph_lock);
600 issued = __ceph_caps_issued(ci, NULL);
601 spin_unlock(&ci->i_ceph_lock);
602 return issued;
603}
604
605static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
606 int touch)
607{
608 int r;
609 spin_lock(&ci->i_ceph_lock);
610 r = __ceph_caps_issued_mask(ci, mask, touch);
611 spin_unlock(&ci->i_ceph_lock);
612 return r;
613}
614
615static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
616{
617 return ci->i_dirty_caps | ci->i_flushing_caps;
618}
619extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
620extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
621extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
622 struct ceph_cap_flush **pcf);
623
624extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
625 struct ceph_cap *ocap, int mask);
626extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
627extern int __ceph_caps_used(struct ceph_inode_info *ci);
628
629extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
630
631
632
633
634static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
635{
636 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
637 if (w & CEPH_CAP_FILE_BUFFER)
638 w |= CEPH_CAP_FILE_EXCL;
639 return w;
640}
641
642
643extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
644
645extern void ceph_caps_init(struct ceph_mds_client *mdsc);
646extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
647extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
648extern void ceph_reserve_caps(struct ceph_mds_client *mdsc,
649 struct ceph_cap_reservation *ctx, int need);
650extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
651 struct ceph_cap_reservation *ctx);
652extern void ceph_reservation_status(struct ceph_fs_client *client,
653 int *total, int *avail, int *used,
654 int *reserved, int *min);
655
656
657
658
659
660
661#define CEPH_F_SYNC 1
662#define CEPH_F_ATEND 2
663
664struct ceph_file_info {
665 short fmode;
666 short flags;
667
668
669 u32 frag;
670 struct ceph_mds_request *last_readdir;
671
672
673 unsigned next_offset;
674 char *last_name;
675 long long dir_release_count;
676 long long dir_ordered_count;
677 int readdir_cache_idx;
678
679
680 char *dir_info;
681 int dir_info_len;
682};
683
684struct ceph_readdir_cache_control {
685 struct page *page;
686 struct dentry **dentries;
687 int index;
688};
689
690
691
692
693
694
695
696
697
698
699struct ceph_snap_realm {
700 u64 ino;
701 atomic_t nref;
702 struct rb_node node;
703
704 u64 created, seq;
705 u64 parent_ino;
706 u64 parent_since;
707
708 u64 *prior_parent_snaps;
709 u32 num_prior_parent_snaps;
710 u64 *snaps;
711 u32 num_snaps;
712
713 struct ceph_snap_realm *parent;
714 struct list_head children;
715 struct list_head child_item;
716
717 struct list_head empty_item;
718
719 struct list_head dirty_item;
720
721
722 struct ceph_snap_context *cached_context;
723
724 struct list_head inodes_with_caps;
725 spinlock_t inodes_with_caps_lock;
726};
727
728static inline int default_congestion_kb(void)
729{
730 int congestion_kb;
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
751 if (congestion_kb > 256*1024)
752 congestion_kb = 256*1024;
753
754 return congestion_kb;
755}
756
757
758
759
760struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
761 u64 ino);
762extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
763 struct ceph_snap_realm *realm);
764extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
765 struct ceph_snap_realm *realm);
766extern int ceph_update_snap_trace(struct ceph_mds_client *m,
767 void *p, void *e, bool deletion,
768 struct ceph_snap_realm **realm_ret);
769extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
770 struct ceph_mds_session *session,
771 struct ceph_msg *msg);
772extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
773extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
774 struct ceph_cap_snap *capsnap);
775extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
776
777
778
779
780
781static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
782{
783 return !list_empty(&ci->i_cap_snaps) &&
784 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
785 ci_item)->writing;
786}
787
788
789extern const struct inode_operations ceph_file_iops;
790
791extern struct inode *ceph_alloc_inode(struct super_block *sb);
792extern void ceph_destroy_inode(struct inode *inode);
793extern int ceph_drop_inode(struct inode *inode);
794
795extern struct inode *ceph_get_inode(struct super_block *sb,
796 struct ceph_vino vino);
797extern struct inode *ceph_get_snapdir(struct inode *parent);
798extern int ceph_fill_file_size(struct inode *inode, int issued,
799 u32 truncate_seq, u64 truncate_size, u64 size);
800extern void ceph_fill_file_time(struct inode *inode, int issued,
801 u64 time_warp_seq, struct timespec *ctime,
802 struct timespec *mtime, struct timespec *atime);
803extern int ceph_fill_trace(struct super_block *sb,
804 struct ceph_mds_request *req);
805extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
806 struct ceph_mds_session *session);
807
808extern int ceph_inode_holds_cap(struct inode *inode, int mask);
809
810extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
811extern void __ceph_do_pending_vmtruncate(struct inode *inode);
812extern void ceph_queue_vmtruncate(struct inode *inode);
813
814extern void ceph_queue_invalidate(struct inode *inode);
815extern void ceph_queue_writeback(struct inode *inode);
816
817extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
818 int mask, bool force);
819static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
820{
821 return __ceph_do_getattr(inode, NULL, mask, force);
822}
823extern int ceph_permission(struct inode *inode, int mask);
824extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
825extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
826extern int ceph_getattr(const struct path *path, struct kstat *stat,
827 u32 request_mask, unsigned int flags);
828
829
830int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
831ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
832extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
833extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
834extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
835extern void __init ceph_xattr_init(void);
836extern void ceph_xattr_exit(void);
837extern const struct xattr_handler *ceph_xattr_handlers[];
838
839#ifdef CONFIG_SECURITY
840extern bool ceph_security_xattr_deadlock(struct inode *in);
841extern bool ceph_security_xattr_wanted(struct inode *in);
842#else
843static inline bool ceph_security_xattr_deadlock(struct inode *in)
844{
845 return false;
846}
847static inline bool ceph_security_xattr_wanted(struct inode *in)
848{
849 return false;
850}
851#endif
852
853
854struct ceph_acls_info {
855 void *default_acl;
856 void *acl;
857 struct ceph_pagelist *pagelist;
858};
859
860#ifdef CONFIG_CEPH_FS_POSIX_ACL
861
862struct posix_acl *ceph_get_acl(struct inode *, int);
863int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
864int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
865 struct ceph_acls_info *info);
866void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info);
867void ceph_release_acls_info(struct ceph_acls_info *info);
868
869static inline void ceph_forget_all_cached_acls(struct inode *inode)
870{
871 forget_all_cached_acls(inode);
872}
873
874#else
875
876#define ceph_get_acl NULL
877#define ceph_set_acl NULL
878
879static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
880 struct ceph_acls_info *info)
881{
882 return 0;
883}
884static inline void ceph_init_inode_acls(struct inode *inode,
885 struct ceph_acls_info *info)
886{
887}
888static inline void ceph_release_acls_info(struct ceph_acls_info *info)
889{
890}
891static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
892{
893 return 0;
894}
895
896static inline void ceph_forget_all_cached_acls(struct inode *inode)
897{
898}
899
900#endif
901
902
903extern const char *ceph_cap_string(int c);
904extern void ceph_handle_caps(struct ceph_mds_session *session,
905 struct ceph_msg *msg);
906extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
907 struct ceph_cap_reservation *ctx);
908extern void ceph_add_cap(struct inode *inode,
909 struct ceph_mds_session *session, u64 cap_id,
910 int fmode, unsigned issued, unsigned wanted,
911 unsigned cap, unsigned seq, u64 realmino, int flags,
912 struct ceph_cap **new_cap);
913extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
914extern void ceph_put_cap(struct ceph_mds_client *mdsc,
915 struct ceph_cap *cap);
916extern int ceph_is_any_caps(struct inode *inode);
917
918extern void ceph_queue_caps_release(struct inode *inode);
919extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
920extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
921 int datasync);
922extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
923 struct ceph_mds_session *session);
924extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
925 struct ceph_mds_session *session);
926extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
927 int mds);
928extern int ceph_get_cap_mds(struct inode *inode);
929extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
930extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
931extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
932 struct ceph_snap_context *snapc);
933extern void ceph_flush_snaps(struct ceph_inode_info *ci,
934 struct ceph_mds_session **psession);
935extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
936extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
937 struct ceph_mds_session *session);
938extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
939extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
940
941extern int ceph_encode_inode_release(void **p, struct inode *inode,
942 int mds, int drop, int unless, int force);
943extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
944 struct inode *dir,
945 int mds, int drop, int unless);
946
947extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
948 loff_t endoff, int *got, struct page **pinned_page);
949extern int ceph_try_get_caps(struct ceph_inode_info *ci,
950 int need, int want, int *got);
951
952
953extern void __ceph_get_fmode(struct ceph_inode_info *ci, int mode);
954extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
955
956
957extern const struct address_space_operations ceph_aops;
958extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
959extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
960extern int ceph_pool_perm_check(struct ceph_inode_info *ci, int need);
961extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
962
963
964extern const struct file_operations ceph_file_fops;
965
966extern int ceph_renew_caps(struct inode *inode);
967extern int ceph_open(struct inode *inode, struct file *file);
968extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
969 struct file *file, unsigned flags, umode_t mode,
970 int *opened);
971extern int ceph_release(struct inode *inode, struct file *filp);
972extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
973 char *data, size_t len);
974
975
976extern const struct file_operations ceph_dir_fops;
977extern const struct file_operations ceph_snapdir_fops;
978extern const struct inode_operations ceph_dir_iops;
979extern const struct inode_operations ceph_snapdir_iops;
980extern const struct dentry_operations ceph_dentry_ops;
981
982extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
983extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
984extern int ceph_handle_snapdir(struct ceph_mds_request *req,
985 struct dentry *dentry, int err);
986extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
987 struct dentry *dentry, int err);
988
989extern void ceph_dentry_lru_add(struct dentry *dn);
990extern void ceph_dentry_lru_touch(struct dentry *dn);
991extern void ceph_dentry_lru_del(struct dentry *dn);
992extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
993extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
994extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
995
996
997extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
998
999
1000extern const struct export_operations ceph_export_ops;
1001
1002
1003extern __init void ceph_flock_init(void);
1004extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1005extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1006extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1007extern int ceph_encode_locks_to_buffer(struct inode *inode,
1008 struct ceph_filelock *flocks,
1009 int num_fcntl_locks,
1010 int num_flock_locks);
1011extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1012 struct ceph_pagelist *pagelist,
1013 int num_fcntl_locks, int num_flock_locks);
1014extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
1015
1016
1017extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
1018extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1019
1020#endif
1021