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