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#include <linux/security.h>
20
21#include <linux/ceph/libceph.h>
22
23#ifdef CONFIG_CEPH_FSCACHE
24#define FSCACHE_USE_NEW_IO_API
25#include <linux/fscache.h>
26#endif
27
28
29#define CEPH_SUPER_MAGIC 0x00c36400
30
31
32
33#define CEPH_BLOCK_SHIFT 22
34#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
35
36#define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1)
37#define CEPH_MOUNT_OPT_DIRSTAT (1<<4)
38#define CEPH_MOUNT_OPT_RBYTES (1<<5)
39#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7)
40#define CEPH_MOUNT_OPT_INO32 (1<<8)
41#define CEPH_MOUNT_OPT_DCACHE (1<<9)
42#define CEPH_MOUNT_OPT_FSCACHE (1<<10)
43#define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11)
44#define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12)
45#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13)
46#define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14)
47#define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15)
48
49#define CEPH_MOUNT_OPT_DEFAULT \
50 (CEPH_MOUNT_OPT_DCACHE | \
51 CEPH_MOUNT_OPT_NOCOPYFROM)
52
53#define ceph_set_mount_opt(fsc, opt) \
54 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt
55#define ceph_clear_mount_opt(fsc, opt) \
56 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt
57#define ceph_test_mount_opt(fsc, opt) \
58 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
59
60
61#define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
62
63
64#define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
65#define CEPH_RASIZE_DEFAULT (8192*1024)
66#define CEPH_MAX_READDIR_DEFAULT 1024
67#define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
68#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
69
70
71
72
73
74
75
76#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5
77#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60
78
79struct ceph_mount_options {
80 unsigned int flags;
81
82 unsigned int wsize;
83 unsigned int rsize;
84 unsigned int rasize;
85 unsigned int congestion_kb;
86 unsigned int caps_wanted_delay_min, caps_wanted_delay_max;
87 int caps_max;
88 unsigned int max_readdir;
89 unsigned int max_readdir_bytes;
90
91
92
93
94
95
96 char *snapdir_name;
97 char *mds_namespace;
98 char *server_path;
99 char *fscache_uniq;
100};
101
102struct ceph_fs_client {
103 struct super_block *sb;
104
105 struct list_head metric_wakeup;
106
107 struct ceph_mount_options *mount_options;
108 struct ceph_client *client;
109
110 int mount_state;
111
112 bool blocklisted;
113
114 bool have_copy_from2;
115
116 u32 filp_gen;
117 loff_t max_file_size;
118
119 struct ceph_mds_client *mdsc;
120
121 atomic_long_t writeback_count;
122
123 struct workqueue_struct *inode_wq;
124 struct workqueue_struct *cap_wq;
125
126#ifdef CONFIG_DEBUG_FS
127 struct dentry *debugfs_dentry_lru, *debugfs_caps;
128 struct dentry *debugfs_congestion_kb;
129 struct dentry *debugfs_bdi;
130 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
131 struct dentry *debugfs_metric;
132 struct dentry *debugfs_status;
133 struct dentry *debugfs_mds_sessions;
134#endif
135
136#ifdef CONFIG_CEPH_FSCACHE
137 struct fscache_cookie *fscache;
138#endif
139};
140
141
142
143
144
145
146
147
148
149
150
151
152struct ceph_cap {
153 struct ceph_inode_info *ci;
154 struct rb_node ci_node;
155 struct ceph_mds_session *session;
156 struct list_head session_caps;
157 u64 cap_id;
158 union {
159
160 struct {
161 int issued;
162 int implemented;
163
164 int mds;
165 int mds_wanted;
166 };
167
168 struct {
169 u64 cap_ino;
170 int queue_release;
171 };
172 };
173 u32 seq, issue_seq, mseq;
174 u32 cap_gen;
175 unsigned long last_used;
176 struct list_head caps_item;
177};
178
179#define CHECK_CAPS_AUTHONLY 1
180#define CHECK_CAPS_FLUSH 2
181#define CHECK_CAPS_NOINVAL 4
182
183struct ceph_cap_flush {
184 u64 tid;
185 int caps;
186 bool wake;
187 bool is_capsnap;
188 struct list_head g_list;
189 struct list_head i_list;
190};
191
192
193
194
195
196
197struct ceph_cap_snap {
198 refcount_t nref;
199 struct list_head ci_item;
200
201 struct ceph_cap_flush cap_flush;
202
203 u64 follows;
204 int issued, dirty;
205 struct ceph_snap_context *context;
206
207 umode_t mode;
208 kuid_t uid;
209 kgid_t gid;
210
211 struct ceph_buffer *xattr_blob;
212 u64 xattr_version;
213
214 u64 size;
215 u64 change_attr;
216 struct timespec64 mtime, atime, ctime, btime;
217 u64 time_warp_seq;
218 u64 truncate_size;
219 u32 truncate_seq;
220 int writing;
221 int dirty_pages;
222 bool inline_data;
223 bool need_flush;
224};
225
226static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
227{
228 if (refcount_dec_and_test(&capsnap->nref)) {
229 if (capsnap->xattr_blob)
230 ceph_buffer_put(capsnap->xattr_blob);
231 kfree(capsnap);
232 }
233}
234
235
236
237
238
239
240
241
242
243#define CEPH_MAX_DIRFRAG_REP 4
244
245struct ceph_inode_frag {
246 struct rb_node node;
247
248
249 u32 frag;
250 int split_by;
251
252
253 int mds;
254 int ndist;
255 int dist[CEPH_MAX_DIRFRAG_REP];
256};
257
258
259
260
261
262struct ceph_inode_xattr {
263 struct rb_node node;
264
265 const char *name;
266 int name_len;
267 const char *val;
268 int val_len;
269 int dirty;
270
271 int should_free_name;
272 int should_free_val;
273};
274
275
276
277
278struct ceph_dentry_info {
279 struct dentry *dentry;
280 struct ceph_mds_session *lease_session;
281 struct list_head lease_list;
282 unsigned flags;
283 int lease_shared_gen;
284 u32 lease_gen;
285 u32 lease_seq;
286 unsigned long lease_renew_after, lease_renew_from;
287 unsigned long time;
288 u64 offset;
289};
290
291#define CEPH_DENTRY_REFERENCED 1
292#define CEPH_DENTRY_LEASE_LIST 2
293#define CEPH_DENTRY_SHRINK_LIST 4
294#define CEPH_DENTRY_PRIMARY_LINK 8
295
296struct ceph_inode_xattrs_info {
297
298
299
300
301
302
303
304 struct ceph_buffer *blob, *prealloc_blob;
305
306 struct rb_root index;
307 bool dirty;
308 int count;
309 int names_size;
310 int vals_size;
311 u64 version, index_version;
312};
313
314
315
316
317struct ceph_inode_info {
318 struct ceph_vino i_vino;
319
320 spinlock_t i_ceph_lock;
321
322 u64 i_version;
323 u64 i_inline_version;
324 u32 i_time_warp_seq;
325
326 unsigned long i_ceph_flags;
327 atomic64_t i_release_count;
328 atomic64_t i_ordered_count;
329 atomic64_t i_complete_seq[2];
330
331 struct ceph_dir_layout i_dir_layout;
332 struct ceph_file_layout i_layout;
333 struct ceph_file_layout i_cached_layout;
334 char *i_symlink;
335
336
337 struct timespec64 i_rctime;
338 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps;
339 u64 i_files, i_subdirs;
340
341
342 u64 i_max_bytes, i_max_files;
343
344 s32 i_dir_pin;
345
346 struct rb_root i_fragtree;
347 int i_fragtree_nsplits;
348 struct mutex i_fragtree_mutex;
349
350 struct ceph_inode_xattrs_info i_xattrs;
351
352
353
354 struct rb_root i_caps;
355 struct ceph_cap *i_auth_cap;
356 unsigned i_dirty_caps, i_flushing_caps;
357
358
359
360
361
362
363
364
365 struct list_head i_dirty_item;
366
367
368
369
370
371
372
373
374 struct list_head i_flushing_item;
375
376
377
378
379 struct ceph_cap_flush *i_prealloc_cap_flush;
380 struct list_head i_cap_flush_list;
381 wait_queue_head_t i_cap_wq;
382 unsigned long i_hold_caps_max;
383 struct list_head i_cap_delay_list;
384 struct ceph_cap_reservation i_cap_migration_resv;
385 struct list_head i_cap_snaps;
386 struct ceph_snap_context *i_head_snapc;
387
388 unsigned i_snap_caps;
389
390 unsigned long i_last_rd;
391 unsigned long i_last_wr;
392 int i_nr_by_mode[CEPH_FILE_MODE_BITS];
393
394 struct mutex i_truncate_mutex;
395 u32 i_truncate_seq;
396 u64 i_truncate_size;
397 int i_truncate_pending;
398
399 u64 i_max_size;
400 u64 i_reported_size;
401 u64 i_wanted_max_size;
402 u64 i_requested_max_size;
403
404
405 int i_pin_ref;
406 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref;
407 int i_wrbuffer_ref, i_wrbuffer_ref_head;
408 atomic_t i_filelock_ref;
409 atomic_t i_shared_gen;
410 u32 i_rdcache_gen;
411 u32 i_rdcache_revoking;
412
413 struct list_head i_unsafe_dirops;
414 struct list_head i_unsafe_iops;
415 spinlock_t i_unsafe_lock;
416
417 union {
418 struct ceph_snap_realm *i_snap_realm;
419 struct ceph_snapid_map *i_snapid_map;
420 };
421 int i_snap_realm_counter;
422 struct list_head i_snap_realm_item;
423 struct list_head i_snap_flush_item;
424 struct timespec64 i_btime;
425 struct timespec64 i_snap_btime;
426
427 struct work_struct i_work;
428 unsigned long i_work_mask;
429
430#ifdef CONFIG_CEPH_FSCACHE
431 struct fscache_cookie *fscache;
432#endif
433 errseq_t i_meta_err;
434
435 struct inode vfs_inode;
436};
437
438static inline struct ceph_inode_info *
439ceph_inode(const struct inode *inode)
440{
441 return container_of(inode, struct ceph_inode_info, vfs_inode);
442}
443
444static inline struct ceph_fs_client *
445ceph_inode_to_client(const struct inode *inode)
446{
447 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
448}
449
450static inline struct ceph_fs_client *
451ceph_sb_to_client(const struct super_block *sb)
452{
453 return (struct ceph_fs_client *)sb->s_fs_info;
454}
455
456static inline struct ceph_mds_client *
457ceph_sb_to_mdsc(const struct super_block *sb)
458{
459 return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc;
460}
461
462static inline struct ceph_vino
463ceph_vino(const struct inode *inode)
464{
465 return ceph_inode(inode)->i_vino;
466}
467
468static inline u32 ceph_ino_to_ino32(u64 vino)
469{
470 u32 ino = vino & 0xffffffff;
471 ino ^= vino >> 32;
472 if (!ino)
473 ino = 2;
474 return ino;
475}
476
477
478
479
480
481
482
483static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
484{
485 if (sizeof(ino_t) == sizeof(u32))
486 return ceph_ino_to_ino32(vino.ino);
487 return (ino_t)vino.ino;
488}
489
490
491#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
492
493static inline u64 ceph_ino(struct inode *inode)
494{
495 return ceph_inode(inode)->i_vino.ino;
496}
497
498static inline u64 ceph_snap(struct inode *inode)
499{
500 return ceph_inode(inode)->i_vino.snap;
501}
502
503
504
505
506
507
508
509
510
511
512
513static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
514{
515 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)))
516 return ceph_ino_to_ino32(ino);
517 return ino;
518}
519
520static inline u64 ceph_present_inode(struct inode *inode)
521{
522 return ceph_present_ino(inode->i_sb, ceph_ino(inode));
523}
524
525static inline int ceph_ino_compare(struct inode *inode, void *data)
526{
527 struct ceph_vino *pvino = (struct ceph_vino *)data;
528 struct ceph_inode_info *ci = ceph_inode(inode);
529 return ci->i_vino.ino == pvino->ino &&
530 ci->i_vino.snap == pvino->snap;
531}
532
533
534
535
536
537
538
539
540#define CEPH_MAX_MDS 0x100
541#define CEPH_NUM_STRAY 10
542#define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS)
543#define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY))
544
545static inline bool ceph_vino_is_reserved(const struct ceph_vino vino)
546{
547 if (vino.ino < CEPH_INO_SYSTEM_BASE &&
548 vino.ino >= CEPH_MDS_INO_MDSDIR_OFFSET) {
549 WARN_RATELIMIT(1, "Attempt to access reserved inode number 0x%llx", vino.ino);
550 return true;
551 }
552 return false;
553}
554
555static inline struct inode *ceph_find_inode(struct super_block *sb,
556 struct ceph_vino vino)
557{
558 if (ceph_vino_is_reserved(vino))
559 return NULL;
560
561
562
563
564
565
566 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
567}
568
569
570
571
572
573#define CEPH_I_DIR_ORDERED (1 << 0)
574#define CEPH_I_FLUSH (1 << 2)
575#define CEPH_I_POOL_PERM (1 << 3)
576#define CEPH_I_POOL_RD (1 << 4)
577#define CEPH_I_POOL_WR (1 << 5)
578#define CEPH_I_SEC_INITED (1 << 6)
579#define CEPH_I_KICK_FLUSH (1 << 7)
580#define CEPH_I_FLUSH_SNAPS (1 << 8)
581#define CEPH_I_ERROR_WRITE (1 << 9)
582#define CEPH_I_ERROR_FILELOCK (1 << 10)
583#define CEPH_I_ODIRECT (1 << 11)
584#define CEPH_ASYNC_CREATE_BIT (12)
585#define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT)
586
587
588
589
590#define CEPH_I_WORK_WRITEBACK 0
591#define CEPH_I_WORK_INVALIDATE_PAGES 1
592#define CEPH_I_WORK_VMTRUNCATE 2
593#define CEPH_I_WORK_CHECK_CAPS 3
594#define CEPH_I_WORK_FLUSH_SNAPS 4
595
596
597
598
599
600
601
602
603static inline void ceph_set_error_write(struct ceph_inode_info *ci)
604{
605 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
606 spin_lock(&ci->i_ceph_lock);
607 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
608 spin_unlock(&ci->i_ceph_lock);
609 }
610}
611
612static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
613{
614 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
615 spin_lock(&ci->i_ceph_lock);
616 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
617 spin_unlock(&ci->i_ceph_lock);
618 }
619}
620
621static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
622 long long release_count,
623 long long ordered_count)
624{
625
626
627
628
629
630 smp_mb();
631 atomic64_set(&ci->i_complete_seq[0], release_count);
632 atomic64_set(&ci->i_complete_seq[1], ordered_count);
633}
634
635static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
636{
637 atomic64_inc(&ci->i_release_count);
638}
639
640static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
641{
642 atomic64_inc(&ci->i_ordered_count);
643}
644
645static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
646{
647 return atomic64_read(&ci->i_complete_seq[0]) ==
648 atomic64_read(&ci->i_release_count);
649}
650
651static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
652{
653 return atomic64_read(&ci->i_complete_seq[0]) ==
654 atomic64_read(&ci->i_release_count) &&
655 atomic64_read(&ci->i_complete_seq[1]) ==
656 atomic64_read(&ci->i_ordered_count);
657}
658
659static inline void ceph_dir_clear_complete(struct inode *inode)
660{
661 __ceph_dir_clear_complete(ceph_inode(inode));
662}
663
664static inline void ceph_dir_clear_ordered(struct inode *inode)
665{
666 __ceph_dir_clear_ordered(ceph_inode(inode));
667}
668
669static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
670{
671 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
672 smp_rmb();
673 return ret;
674}
675
676
677extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
678 u32 f);
679
680
681
682
683
684extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
685 struct ceph_inode_frag *pfrag,
686 int *found);
687
688static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
689{
690 return (struct ceph_dentry_info *)dentry->d_fsdata;
691}
692
693
694
695
696static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
697{
698 return !RB_EMPTY_ROOT(&ci->i_caps);
699}
700
701extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
702extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
703extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask,
704 int t);
705extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
706 struct ceph_cap *cap);
707
708static inline int ceph_caps_issued(struct ceph_inode_info *ci)
709{
710 int issued;
711 spin_lock(&ci->i_ceph_lock);
712 issued = __ceph_caps_issued(ci, NULL);
713 spin_unlock(&ci->i_ceph_lock);
714 return issued;
715}
716
717static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci,
718 int mask, int touch)
719{
720 int r;
721 spin_lock(&ci->i_ceph_lock);
722 r = __ceph_caps_issued_mask_metric(ci, mask, touch);
723 spin_unlock(&ci->i_ceph_lock);
724 return r;
725}
726
727static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
728{
729 return ci->i_dirty_caps | ci->i_flushing_caps;
730}
731extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
732extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
733extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
734 struct ceph_cap_flush **pcf);
735
736extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
737 struct ceph_cap *ocap, int mask);
738extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
739extern int __ceph_caps_used(struct ceph_inode_info *ci);
740
741static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
742{
743 return ci->i_nr_by_mode[0];
744}
745extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
746extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
747
748
749extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
750
751extern void ceph_caps_init(struct ceph_mds_client *mdsc);
752extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
753extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
754 struct ceph_mount_options *fsopt);
755extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
756 struct ceph_cap_reservation *ctx, int need);
757extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
758 struct ceph_cap_reservation *ctx);
759extern void ceph_reservation_status(struct ceph_fs_client *client,
760 int *total, int *avail, int *used,
761 int *reserved, int *min);
762
763
764
765
766
767
768#define CEPH_F_SYNC 1
769#define CEPH_F_ATEND 2
770
771struct ceph_file_info {
772 short fmode;
773 short flags;
774
775 spinlock_t rw_contexts_lock;
776 struct list_head rw_contexts;
777
778 errseq_t meta_err;
779 u32 filp_gen;
780 atomic_t num_locks;
781};
782
783struct ceph_dir_file_info {
784 struct ceph_file_info file_info;
785
786
787 u32 frag;
788 struct ceph_mds_request *last_readdir;
789
790
791 unsigned next_offset;
792 char *last_name;
793 long long dir_release_count;
794 long long dir_ordered_count;
795 int readdir_cache_idx;
796
797
798 char *dir_info;
799 int dir_info_len;
800};
801
802struct ceph_rw_context {
803 struct list_head list;
804 struct task_struct *thread;
805 int caps;
806};
807
808#define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
809 struct ceph_rw_context _name = { \
810 .thread = current, \
811 .caps = _caps, \
812 }
813
814static inline void ceph_add_rw_context(struct ceph_file_info *cf,
815 struct ceph_rw_context *ctx)
816{
817 spin_lock(&cf->rw_contexts_lock);
818 list_add(&ctx->list, &cf->rw_contexts);
819 spin_unlock(&cf->rw_contexts_lock);
820}
821
822static inline void ceph_del_rw_context(struct ceph_file_info *cf,
823 struct ceph_rw_context *ctx)
824{
825 spin_lock(&cf->rw_contexts_lock);
826 list_del(&ctx->list);
827 spin_unlock(&cf->rw_contexts_lock);
828}
829
830static inline struct ceph_rw_context*
831ceph_find_rw_context(struct ceph_file_info *cf)
832{
833 struct ceph_rw_context *ctx, *found = NULL;
834 spin_lock(&cf->rw_contexts_lock);
835 list_for_each_entry(ctx, &cf->rw_contexts, list) {
836 if (ctx->thread == current) {
837 found = ctx;
838 break;
839 }
840 }
841 spin_unlock(&cf->rw_contexts_lock);
842 return found;
843}
844
845struct ceph_readdir_cache_control {
846 struct page *page;
847 struct dentry **dentries;
848 int index;
849};
850
851
852
853
854
855
856
857
858
859
860struct ceph_snap_realm {
861 u64 ino;
862 struct inode *inode;
863 atomic_t nref;
864 struct rb_node node;
865
866 u64 created, seq;
867 u64 parent_ino;
868 u64 parent_since;
869
870 u64 *prior_parent_snaps;
871 u32 num_prior_parent_snaps;
872 u64 *snaps;
873 u32 num_snaps;
874
875 struct ceph_snap_realm *parent;
876 struct list_head children;
877 struct list_head child_item;
878
879 struct list_head empty_item;
880
881 struct list_head dirty_item;
882
883
884 struct ceph_snap_context *cached_context;
885
886 struct list_head inodes_with_caps;
887 spinlock_t inodes_with_caps_lock;
888};
889
890static inline int default_congestion_kb(void)
891{
892 int congestion_kb;
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
913 if (congestion_kb > 256*1024)
914 congestion_kb = 256*1024;
915
916 return congestion_kb;
917}
918
919
920
921extern int ceph_force_reconnect(struct super_block *sb);
922
923struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
924 u64 ino);
925extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
926 struct ceph_snap_realm *realm);
927extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
928 struct ceph_snap_realm *realm);
929extern int ceph_update_snap_trace(struct ceph_mds_client *m,
930 void *p, void *e, bool deletion,
931 struct ceph_snap_realm **realm_ret);
932extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
933 struct ceph_mds_session *session,
934 struct ceph_msg *msg);
935extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
936 struct ceph_cap_snap *capsnap);
937extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
938
939extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
940 u64 snap);
941extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
942 struct ceph_snapid_map *sm);
943extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
944extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
945
946
947
948
949
950
951static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
952{
953 return !list_empty(&ci->i_cap_snaps) &&
954 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
955 ci_item)->writing;
956}
957
958
959struct ceph_mds_reply_info_in;
960struct ceph_mds_reply_dirfrag;
961
962extern const struct inode_operations ceph_file_iops;
963
964extern struct inode *ceph_alloc_inode(struct super_block *sb);
965extern void ceph_evict_inode(struct inode *inode);
966extern void ceph_free_inode(struct inode *inode);
967
968extern struct inode *ceph_get_inode(struct super_block *sb,
969 struct ceph_vino vino);
970extern struct inode *ceph_get_snapdir(struct inode *parent);
971extern int ceph_fill_file_size(struct inode *inode, int issued,
972 u32 truncate_seq, u64 truncate_size, u64 size);
973extern void ceph_fill_file_time(struct inode *inode, int issued,
974 u64 time_warp_seq, struct timespec64 *ctime,
975 struct timespec64 *mtime,
976 struct timespec64 *atime);
977extern int ceph_fill_inode(struct inode *inode, struct page *locked_page,
978 struct ceph_mds_reply_info_in *iinfo,
979 struct ceph_mds_reply_dirfrag *dirinfo,
980 struct ceph_mds_session *session, int cap_fmode,
981 struct ceph_cap_reservation *caps_reservation);
982extern int ceph_fill_trace(struct super_block *sb,
983 struct ceph_mds_request *req);
984extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
985 struct ceph_mds_session *session);
986
987extern int ceph_inode_holds_cap(struct inode *inode, int mask);
988
989extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
990extern void __ceph_do_pending_vmtruncate(struct inode *inode);
991
992void ceph_queue_inode_work(struct inode *inode, int work_bit);
993
994static inline void ceph_queue_vmtruncate(struct inode *inode)
995{
996 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE);
997}
998
999static inline void ceph_queue_invalidate(struct inode *inode)
1000{
1001 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES);
1002}
1003
1004static inline void ceph_queue_writeback(struct inode *inode)
1005{
1006 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK);
1007}
1008
1009static inline void ceph_queue_check_caps(struct inode *inode)
1010{
1011 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS);
1012}
1013
1014static inline void ceph_queue_flush_snaps(struct inode *inode)
1015{
1016 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS);
1017}
1018
1019extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
1020 int mask, bool force);
1021static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
1022{
1023 return __ceph_do_getattr(inode, NULL, mask, force);
1024}
1025extern int ceph_permission(struct user_namespace *mnt_userns,
1026 struct inode *inode, int mask);
1027extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
1028extern int ceph_setattr(struct user_namespace *mnt_userns,
1029 struct dentry *dentry, struct iattr *attr);
1030extern int ceph_getattr(struct user_namespace *mnt_userns,
1031 const struct path *path, struct kstat *stat,
1032 u32 request_mask, unsigned int flags);
1033
1034
1035int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
1036ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
1037extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
1038extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
1039extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
1040extern const struct xattr_handler *ceph_xattr_handlers[];
1041
1042struct ceph_acl_sec_ctx {
1043#ifdef CONFIG_CEPH_FS_POSIX_ACL
1044 void *default_acl;
1045 void *acl;
1046#endif
1047#ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1048 void *sec_ctx;
1049 u32 sec_ctxlen;
1050#endif
1051 struct ceph_pagelist *pagelist;
1052};
1053
1054#ifdef CONFIG_SECURITY
1055extern bool ceph_security_xattr_deadlock(struct inode *in);
1056extern bool ceph_security_xattr_wanted(struct inode *in);
1057#else
1058static inline bool ceph_security_xattr_deadlock(struct inode *in)
1059{
1060 return false;
1061}
1062static inline bool ceph_security_xattr_wanted(struct inode *in)
1063{
1064 return false;
1065}
1066#endif
1067
1068#ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1069extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1070 struct ceph_acl_sec_ctx *ctx);
1071static inline void ceph_security_invalidate_secctx(struct inode *inode)
1072{
1073 security_inode_invalidate_secctx(inode);
1074}
1075#else
1076static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1077 struct ceph_acl_sec_ctx *ctx)
1078{
1079 return 0;
1080}
1081static inline void ceph_security_invalidate_secctx(struct inode *inode)
1082{
1083}
1084#endif
1085
1086void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
1087
1088
1089#ifdef CONFIG_CEPH_FS_POSIX_ACL
1090
1091struct posix_acl *ceph_get_acl(struct inode *, int);
1092int ceph_set_acl(struct user_namespace *mnt_userns,
1093 struct inode *inode, struct posix_acl *acl, int type);
1094int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1095 struct ceph_acl_sec_ctx *as_ctx);
1096void ceph_init_inode_acls(struct inode *inode,
1097 struct ceph_acl_sec_ctx *as_ctx);
1098
1099static inline void ceph_forget_all_cached_acls(struct inode *inode)
1100{
1101 forget_all_cached_acls(inode);
1102}
1103
1104#else
1105
1106#define ceph_get_acl NULL
1107#define ceph_set_acl NULL
1108
1109static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1110 struct ceph_acl_sec_ctx *as_ctx)
1111{
1112 return 0;
1113}
1114static inline void ceph_init_inode_acls(struct inode *inode,
1115 struct ceph_acl_sec_ctx *as_ctx)
1116{
1117}
1118static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
1119{
1120 return 0;
1121}
1122
1123static inline void ceph_forget_all_cached_acls(struct inode *inode)
1124{
1125}
1126
1127#endif
1128
1129
1130extern const char *ceph_cap_string(int c);
1131extern void ceph_handle_caps(struct ceph_mds_session *session,
1132 struct ceph_msg *msg);
1133extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
1134 struct ceph_cap_reservation *ctx);
1135extern void ceph_add_cap(struct inode *inode,
1136 struct ceph_mds_session *session, u64 cap_id,
1137 unsigned issued, unsigned wanted,
1138 unsigned cap, unsigned seq, u64 realmino, int flags,
1139 struct ceph_cap **new_cap);
1140extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
1141extern void __ceph_remove_caps(struct ceph_inode_info *ci);
1142extern void ceph_put_cap(struct ceph_mds_client *mdsc,
1143 struct ceph_cap *cap);
1144extern int ceph_is_any_caps(struct inode *inode);
1145
1146extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
1147extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
1148 int datasync);
1149extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
1150 struct ceph_mds_session *session);
1151extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
1152 struct ceph_mds_session *session);
1153void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session,
1154 struct ceph_inode_info *ci);
1155extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
1156 int mds);
1157extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps,
1158 bool snap_rwsem_locked);
1159extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
1160extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
1161extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had);
1162extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci,
1163 int had);
1164extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
1165 struct ceph_snap_context *snapc);
1166extern void ceph_flush_snaps(struct ceph_inode_info *ci,
1167 struct ceph_mds_session **psession);
1168extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
1169extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
1170 struct ceph_mds_session *session);
1171extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
1172extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
1173extern int ceph_drop_caps_for_unlink(struct inode *inode);
1174extern int ceph_encode_inode_release(void **p, struct inode *inode,
1175 int mds, int drop, int unless, int force);
1176extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
1177 struct inode *dir,
1178 int mds, int drop, int unless);
1179
1180extern int ceph_get_caps(struct file *filp, int need, int want,
1181 loff_t endoff, int *got);
1182extern int ceph_try_get_caps(struct inode *inode,
1183 int need, int want, bool nonblock, int *got);
1184
1185
1186extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
1187extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
1188extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
1189 struct ceph_mds_client *mdsc, int fmode);
1190
1191
1192extern const struct address_space_operations ceph_aops;
1193extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
1194extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
1195extern int ceph_pool_perm_check(struct inode *inode, int need);
1196extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
1197
1198
1199extern const struct file_operations ceph_file_fops;
1200
1201extern int ceph_renew_caps(struct inode *inode, int fmode);
1202extern int ceph_open(struct inode *inode, struct file *file);
1203extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
1204 struct file *file, unsigned flags, umode_t mode);
1205extern int ceph_release(struct inode *inode, struct file *filp);
1206extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
1207 char *data, size_t len);
1208
1209
1210extern const struct file_operations ceph_dir_fops;
1211extern const struct file_operations ceph_snapdir_fops;
1212extern const struct inode_operations ceph_dir_iops;
1213extern const struct inode_operations ceph_snapdir_iops;
1214extern const struct dentry_operations ceph_dentry_ops;
1215
1216extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
1217extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
1218extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
1219 struct dentry *dentry);
1220extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
1221 struct dentry *dentry, int err);
1222
1223extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
1224extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
1225extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
1226extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
1227extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
1228extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
1229
1230
1231extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1232
1233
1234extern const struct export_operations ceph_export_ops;
1235struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
1236
1237
1238extern __init void ceph_flock_init(void);
1239extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1240extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1241extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1242extern int ceph_encode_locks_to_buffer(struct inode *inode,
1243 struct ceph_filelock *flocks,
1244 int num_fcntl_locks,
1245 int num_flock_locks);
1246extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1247 struct ceph_pagelist *pagelist,
1248 int num_fcntl_locks, int num_flock_locks);
1249
1250
1251extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
1252extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1253
1254
1255static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci)
1256{
1257 return ci->i_max_files || ci->i_max_bytes;
1258}
1259
1260extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
1261
1262static inline void __ceph_update_quota(struct ceph_inode_info *ci,
1263 u64 max_bytes, u64 max_files)
1264{
1265 bool had_quota, has_quota;
1266 had_quota = __ceph_has_any_quota(ci);
1267 ci->i_max_bytes = max_bytes;
1268 ci->i_max_files = max_files;
1269 has_quota = __ceph_has_any_quota(ci);
1270
1271 if (had_quota != has_quota)
1272 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota);
1273}
1274
1275extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
1276 struct ceph_mds_session *session,
1277 struct ceph_msg *msg);
1278extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
1279extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
1280extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
1281 loff_t newlen);
1282extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
1283 loff_t newlen);
1284extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
1285 struct kstatfs *buf);
1286extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
1287
1288#endif
1289