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19#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
21
22#include <linux/version.h>
23#include <linux/mm.h>
24#include <linux/highmem.h>
25#include <linux/fs.h>
26#include <linux/completion.h>
27#include <linux/backing-dev.h>
28#include <linux/wait.h>
29#include <asm/kmap_types.h>
30#include "extent_io.h"
31#include "extent_map.h"
32#include "async-thread.h"
33
34struct btrfs_trans_handle;
35struct btrfs_transaction;
36extern struct kmem_cache *btrfs_trans_handle_cachep;
37extern struct kmem_cache *btrfs_transaction_cachep;
38extern struct kmem_cache *btrfs_bit_radix_cachep;
39extern struct kmem_cache *btrfs_path_cachep;
40struct btrfs_ordered_sum;
41
42#define BTRFS_MAGIC "_BHRfS_M"
43
44#define BTRFS_MAX_LEVEL 8
45
46#define BTRFS_COMPAT_EXTENT_TREE_V0
47
48
49
50
51
52
53#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
54
55
56#define BTRFS_ROOT_TREE_OBJECTID 1ULL
57
58
59#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
60
61
62
63
64
65#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
66
67
68
69
70
71#define BTRFS_DEV_TREE_OBJECTID 4ULL
72
73
74#define BTRFS_FS_TREE_OBJECTID 5ULL
75
76
77#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78
79
80#define BTRFS_CSUM_TREE_OBJECTID 7ULL
81
82
83#define BTRFS_ORPHAN_OBJECTID -5ULL
84
85
86#define BTRFS_TREE_LOG_OBJECTID -6ULL
87#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
88
89
90#define BTRFS_TREE_RELOC_OBJECTID -8ULL
91#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
92
93
94
95
96
97
98#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
99
100
101#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
102
103
104
105
106#define BTRFS_FIRST_FREE_OBJECTID 256ULL
107#define BTRFS_LAST_FREE_OBJECTID -256ULL
108#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
109
110
111
112
113
114
115#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
116
117#define BTRFS_BTREE_INODE_OBJECTID 1
118
119#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
120
121
122
123
124
125#define BTRFS_NAME_LEN 255
126
127
128#define BTRFS_CSUM_SIZE 32
129
130
131#define BTRFS_CSUM_TYPE_CRC32 0
132
133static int btrfs_csum_sizes[] = { 4, 0 };
134
135
136#define BTRFS_EMPTY_DIR_SIZE 0
137
138#define BTRFS_FT_UNKNOWN 0
139#define BTRFS_FT_REG_FILE 1
140#define BTRFS_FT_DIR 2
141#define BTRFS_FT_CHRDEV 3
142#define BTRFS_FT_BLKDEV 4
143#define BTRFS_FT_FIFO 5
144#define BTRFS_FT_SOCK 6
145#define BTRFS_FT_SYMLINK 7
146#define BTRFS_FT_XATTR 8
147#define BTRFS_FT_MAX 9
148
149
150
151
152
153
154
155
156
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159
160
161
162
163
164
165
166struct btrfs_disk_key {
167 __le64 objectid;
168 u8 type;
169 __le64 offset;
170} __attribute__ ((__packed__));
171
172struct btrfs_key {
173 u64 objectid;
174 u8 type;
175 u64 offset;
176} __attribute__ ((__packed__));
177
178struct btrfs_mapping_tree {
179 struct extent_map_tree map_tree;
180};
181
182#define BTRFS_UUID_SIZE 16
183struct btrfs_dev_item {
184
185 __le64 devid;
186
187
188 __le64 total_bytes;
189
190
191 __le64 bytes_used;
192
193
194 __le32 io_align;
195
196
197 __le32 io_width;
198
199
200 __le32 sector_size;
201
202
203 __le64 type;
204
205
206 __le64 generation;
207
208
209
210
211
212 __le64 start_offset;
213
214
215 __le32 dev_group;
216
217
218 u8 seek_speed;
219
220
221 u8 bandwidth;
222
223
224 u8 uuid[BTRFS_UUID_SIZE];
225
226
227 u8 fsid[BTRFS_UUID_SIZE];
228} __attribute__ ((__packed__));
229
230struct btrfs_stripe {
231 __le64 devid;
232 __le64 offset;
233 u8 dev_uuid[BTRFS_UUID_SIZE];
234} __attribute__ ((__packed__));
235
236struct btrfs_chunk {
237
238 __le64 length;
239
240
241 __le64 owner;
242
243 __le64 stripe_len;
244 __le64 type;
245
246
247 __le32 io_align;
248
249
250 __le32 io_width;
251
252
253 __le32 sector_size;
254
255
256
257
258 __le16 num_stripes;
259
260
261 __le16 sub_stripes;
262 struct btrfs_stripe stripe;
263
264} __attribute__ ((__packed__));
265
266static inline unsigned long btrfs_chunk_item_size(int num_stripes)
267{
268 BUG_ON(num_stripes == 0);
269 return sizeof(struct btrfs_chunk) +
270 sizeof(struct btrfs_stripe) * (num_stripes - 1);
271}
272
273#define BTRFS_FSID_SIZE 16
274#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
275#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
276#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
277#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
278
279#define BTRFS_BACKREF_REV_MAX 256
280#define BTRFS_BACKREF_REV_SHIFT 56
281#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
282 BTRFS_BACKREF_REV_SHIFT)
283
284#define BTRFS_OLD_BACKREF_REV 0
285#define BTRFS_MIXED_BACKREF_REV 1
286
287
288
289
290struct btrfs_header {
291
292 u8 csum[BTRFS_CSUM_SIZE];
293 u8 fsid[BTRFS_FSID_SIZE];
294 __le64 bytenr;
295 __le64 flags;
296
297
298 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
299 __le64 generation;
300 __le64 owner;
301 __le32 nritems;
302 u8 level;
303} __attribute__ ((__packed__));
304
305#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
306 sizeof(struct btrfs_header)) / \
307 sizeof(struct btrfs_key_ptr))
308#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
309#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
310#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
311 sizeof(struct btrfs_item) - \
312 sizeof(struct btrfs_file_extent_item))
313
314
315
316
317
318
319#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
320#define BTRFS_LABEL_SIZE 256
321
322
323
324
325
326struct btrfs_super_block {
327 u8 csum[BTRFS_CSUM_SIZE];
328
329 u8 fsid[BTRFS_FSID_SIZE];
330 __le64 bytenr;
331 __le64 flags;
332
333
334 __le64 magic;
335 __le64 generation;
336 __le64 root;
337 __le64 chunk_root;
338 __le64 log_root;
339
340
341 __le64 log_root_transid;
342 __le64 total_bytes;
343 __le64 bytes_used;
344 __le64 root_dir_objectid;
345 __le64 num_devices;
346 __le32 sectorsize;
347 __le32 nodesize;
348 __le32 leafsize;
349 __le32 stripesize;
350 __le32 sys_chunk_array_size;
351 __le64 chunk_root_generation;
352 __le64 compat_flags;
353 __le64 compat_ro_flags;
354 __le64 incompat_flags;
355 __le16 csum_type;
356 u8 root_level;
357 u8 chunk_root_level;
358 u8 log_root_level;
359 struct btrfs_dev_item dev_item;
360
361 char label[BTRFS_LABEL_SIZE];
362
363
364 __le64 reserved[32];
365 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
366} __attribute__ ((__packed__));
367
368
369
370
371
372#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
373
374#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
375#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
376#define BTRFS_FEATURE_INCOMPAT_SUPP \
377 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
378
379
380
381
382
383struct btrfs_item {
384 struct btrfs_disk_key key;
385 __le32 offset;
386 __le32 size;
387} __attribute__ ((__packed__));
388
389
390
391
392
393
394
395
396struct btrfs_leaf {
397 struct btrfs_header header;
398 struct btrfs_item items[];
399} __attribute__ ((__packed__));
400
401
402
403
404
405struct btrfs_key_ptr {
406 struct btrfs_disk_key key;
407 __le64 blockptr;
408 __le64 generation;
409} __attribute__ ((__packed__));
410
411struct btrfs_node {
412 struct btrfs_header header;
413 struct btrfs_key_ptr ptrs[];
414} __attribute__ ((__packed__));
415
416
417
418
419
420
421
422
423
424struct btrfs_path {
425 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
426 int slots[BTRFS_MAX_LEVEL];
427
428 int locks[BTRFS_MAX_LEVEL];
429 int reada;
430
431 int lowest_level;
432
433
434
435
436
437 unsigned int search_for_split:1;
438 unsigned int keep_locks:1;
439 unsigned int skip_locking:1;
440 unsigned int leave_spinning:1;
441 unsigned int search_commit_root:1;
442};
443
444
445
446
447
448
449struct btrfs_extent_item {
450 __le64 refs;
451 __le64 generation;
452 __le64 flags;
453} __attribute__ ((__packed__));
454
455struct btrfs_extent_item_v0 {
456 __le32 refs;
457} __attribute__ ((__packed__));
458
459#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
460 sizeof(struct btrfs_item))
461
462#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
463#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
464
465
466
467
468#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
469
470struct btrfs_tree_block_info {
471 struct btrfs_disk_key key;
472 u8 level;
473} __attribute__ ((__packed__));
474
475struct btrfs_extent_data_ref {
476 __le64 root;
477 __le64 objectid;
478 __le64 offset;
479 __le32 count;
480} __attribute__ ((__packed__));
481
482struct btrfs_shared_data_ref {
483 __le32 count;
484} __attribute__ ((__packed__));
485
486struct btrfs_extent_inline_ref {
487 u8 type;
488 __le64 offset;
489} __attribute__ ((__packed__));
490
491
492struct btrfs_extent_ref_v0 {
493 __le64 root;
494 __le64 generation;
495 __le64 objectid;
496 __le32 count;
497} __attribute__ ((__packed__));
498
499
500
501
502
503
504struct btrfs_dev_extent {
505 __le64 chunk_tree;
506 __le64 chunk_objectid;
507 __le64 chunk_offset;
508 __le64 length;
509 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
510} __attribute__ ((__packed__));
511
512struct btrfs_inode_ref {
513 __le64 index;
514 __le16 name_len;
515
516} __attribute__ ((__packed__));
517
518struct btrfs_timespec {
519 __le64 sec;
520 __le32 nsec;
521} __attribute__ ((__packed__));
522
523enum btrfs_compression_type {
524 BTRFS_COMPRESS_NONE = 0,
525 BTRFS_COMPRESS_ZLIB = 1,
526 BTRFS_COMPRESS_LAST = 2,
527};
528
529struct btrfs_inode_item {
530
531 __le64 generation;
532
533 __le64 transid;
534 __le64 size;
535 __le64 nbytes;
536 __le64 block_group;
537 __le32 nlink;
538 __le32 uid;
539 __le32 gid;
540 __le32 mode;
541 __le64 rdev;
542 __le64 flags;
543
544
545 __le64 sequence;
546
547
548
549
550
551 __le64 reserved[4];
552 struct btrfs_timespec atime;
553 struct btrfs_timespec ctime;
554 struct btrfs_timespec mtime;
555 struct btrfs_timespec otime;
556} __attribute__ ((__packed__));
557
558struct btrfs_dir_log_item {
559 __le64 end;
560} __attribute__ ((__packed__));
561
562struct btrfs_dir_item {
563 struct btrfs_disk_key location;
564 __le64 transid;
565 __le16 data_len;
566 __le16 name_len;
567 u8 type;
568} __attribute__ ((__packed__));
569
570struct btrfs_root_item {
571 struct btrfs_inode_item inode;
572 __le64 generation;
573 __le64 root_dirid;
574 __le64 bytenr;
575 __le64 byte_limit;
576 __le64 bytes_used;
577 __le64 last_snapshot;
578 __le64 flags;
579 __le32 refs;
580 struct btrfs_disk_key drop_progress;
581 u8 drop_level;
582 u8 level;
583} __attribute__ ((__packed__));
584
585
586
587
588struct btrfs_root_ref {
589 __le64 dirid;
590 __le64 sequence;
591 __le16 name_len;
592} __attribute__ ((__packed__));
593
594#define BTRFS_FILE_EXTENT_INLINE 0
595#define BTRFS_FILE_EXTENT_REG 1
596#define BTRFS_FILE_EXTENT_PREALLOC 2
597
598struct btrfs_file_extent_item {
599
600
601
602 __le64 generation;
603
604
605
606
607
608
609
610 __le64 ram_bytes;
611
612
613
614
615
616
617
618
619 u8 compression;
620 u8 encryption;
621 __le16 other_encoding;
622
623
624 u8 type;
625
626
627
628
629
630 __le64 disk_bytenr;
631 __le64 disk_num_bytes;
632
633
634
635
636
637
638
639 __le64 offset;
640
641
642
643
644 __le64 num_bytes;
645
646} __attribute__ ((__packed__));
647
648struct btrfs_csum_item {
649 u8 csum;
650} __attribute__ ((__packed__));
651
652
653#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
654#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
655#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
656#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
657#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
658#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
659#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
660
661struct btrfs_block_group_item {
662 __le64 used;
663 __le64 chunk_objectid;
664 __le64 flags;
665} __attribute__ ((__packed__));
666
667struct btrfs_space_info {
668 u64 flags;
669
670 u64 total_bytes;
671 u64 bytes_used;
672 u64 bytes_pinned;
673
674 u64 bytes_reserved;
675
676 u64 bytes_readonly;
677 u64 bytes_super;
678 u64 bytes_root;
679
680 u64 bytes_may_use;
681
682 u64 bytes_delalloc;
683
684
685 int full;
686
687 int force_alloc;
688
689 int force_delalloc;
690
691
692 struct list_head list;
693
694
695 wait_queue_head_t allocate_wait;
696 wait_queue_head_t flush_wait;
697 int allocating_chunk;
698 int flushing;
699
700
701 struct list_head block_groups;
702 spinlock_t lock;
703 struct rw_semaphore groups_sem;
704 atomic_t caching_threads;
705};
706
707
708
709
710
711
712struct btrfs_free_cluster {
713 spinlock_t lock;
714 spinlock_t refill_lock;
715 struct rb_root root;
716
717
718 u64 max_size;
719
720
721 u64 window_start;
722
723
724 bool points_to_bitmap;
725
726 struct btrfs_block_group_cache *block_group;
727
728
729
730
731
732 struct list_head block_group_list;
733};
734
735enum btrfs_caching_type {
736 BTRFS_CACHE_NO = 0,
737 BTRFS_CACHE_STARTED = 1,
738 BTRFS_CACHE_FINISHED = 2,
739};
740
741struct btrfs_caching_control {
742 struct list_head list;
743 struct mutex mutex;
744 wait_queue_head_t wait;
745 struct btrfs_block_group_cache *block_group;
746 u64 progress;
747 atomic_t count;
748};
749
750struct btrfs_block_group_cache {
751 struct btrfs_key key;
752 struct btrfs_block_group_item item;
753 struct btrfs_fs_info *fs_info;
754 spinlock_t lock;
755 u64 pinned;
756 u64 reserved;
757 u64 bytes_super;
758 u64 flags;
759 u64 sectorsize;
760 int extents_thresh;
761 int free_extents;
762 int total_bitmaps;
763 int ro;
764 int dirty;
765
766
767 int cached;
768 struct btrfs_caching_control *caching_ctl;
769 u64 last_byte_to_unpin;
770
771 struct btrfs_space_info *space_info;
772
773
774 spinlock_t tree_lock;
775 struct rb_root free_space_offset;
776 u64 free_space;
777
778
779 struct rb_node cache_node;
780
781
782 struct list_head list;
783
784
785 atomic_t count;
786
787
788
789
790 struct list_head cluster_list;
791};
792
793struct reloc_control;
794struct btrfs_device;
795struct btrfs_fs_devices;
796struct btrfs_fs_info {
797 u8 fsid[BTRFS_FSID_SIZE];
798 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
799 struct btrfs_root *extent_root;
800 struct btrfs_root *tree_root;
801 struct btrfs_root *chunk_root;
802 struct btrfs_root *dev_root;
803 struct btrfs_root *fs_root;
804 struct btrfs_root *csum_root;
805
806
807 struct btrfs_root *log_root_tree;
808
809 spinlock_t fs_roots_radix_lock;
810 struct radix_tree_root fs_roots_radix;
811
812
813 spinlock_t block_group_cache_lock;
814 struct rb_root block_group_cache_tree;
815
816 struct extent_io_tree freed_extents[2];
817 struct extent_io_tree *pinned_extents;
818
819
820 struct btrfs_mapping_tree mapping_tree;
821
822 u64 generation;
823 u64 last_trans_committed;
824
825
826
827
828
829 u64 last_trans_log_full_commit;
830 u64 open_ioctl_trans;
831 unsigned long mount_opt;
832 u64 max_extent;
833 u64 max_inline;
834 u64 alloc_start;
835 struct btrfs_transaction *running_transaction;
836 wait_queue_head_t transaction_throttle;
837 wait_queue_head_t transaction_wait;
838 wait_queue_head_t async_submit_wait;
839
840 struct btrfs_super_block super_copy;
841 struct btrfs_super_block super_for_commit;
842 struct block_device *__bdev;
843 struct super_block *sb;
844 struct inode *btree_inode;
845 struct backing_dev_info bdi;
846 struct mutex trans_mutex;
847 struct mutex tree_log_mutex;
848 struct mutex transaction_kthread_mutex;
849 struct mutex cleaner_mutex;
850 struct mutex chunk_mutex;
851 struct mutex volume_mutex;
852
853
854
855
856
857
858
859 struct mutex ordered_operations_mutex;
860 struct rw_semaphore extent_commit_sem;
861
862 struct rw_semaphore subvol_sem;
863
864 struct srcu_struct subvol_srcu;
865
866 struct list_head trans_list;
867 struct list_head hashers;
868 struct list_head dead_roots;
869 struct list_head caching_block_groups;
870
871 atomic_t nr_async_submits;
872 atomic_t async_submit_draining;
873 atomic_t nr_async_bios;
874 atomic_t async_delalloc_pages;
875
876
877
878
879
880 spinlock_t ordered_extent_lock;
881
882
883
884
885
886
887 struct list_head ordered_extents;
888
889
890
891
892
893
894 struct list_head delalloc_inodes;
895
896
897
898
899
900
901 struct list_head ordered_operations;
902
903
904
905
906
907
908
909
910
911
912
913 struct btrfs_workers generic_worker;
914 struct btrfs_workers workers;
915 struct btrfs_workers delalloc_workers;
916 struct btrfs_workers endio_workers;
917 struct btrfs_workers endio_meta_workers;
918 struct btrfs_workers endio_meta_write_workers;
919 struct btrfs_workers endio_write_workers;
920 struct btrfs_workers submit_workers;
921 struct btrfs_workers enospc_workers;
922
923
924
925
926
927 struct btrfs_workers fixup_workers;
928 struct task_struct *transaction_kthread;
929 struct task_struct *cleaner_kthread;
930 int thread_pool_size;
931
932 struct kobject super_kobj;
933 struct completion kobj_unregister;
934 int do_barriers;
935 int closing;
936 int log_root_recovering;
937
938 u64 total_pinned;
939
940
941
942
943 u64 dirty_metadata_bytes;
944 struct list_head dirty_cowonly_roots;
945
946 struct btrfs_fs_devices *fs_devices;
947
948
949
950
951
952
953 struct list_head space_info;
954
955 struct reloc_control *reloc_ctl;
956
957 spinlock_t delalloc_lock;
958 spinlock_t new_trans_lock;
959 u64 delalloc_bytes;
960
961
962 struct btrfs_free_cluster data_alloc_cluster;
963
964
965 struct btrfs_free_cluster meta_alloc_cluster;
966
967 spinlock_t ref_cache_lock;
968 u64 total_ref_cache_size;
969
970 u64 avail_data_alloc_bits;
971 u64 avail_metadata_alloc_bits;
972 u64 avail_system_alloc_bits;
973 u64 data_alloc_profile;
974 u64 metadata_alloc_profile;
975 u64 system_alloc_profile;
976
977 unsigned data_chunk_allocations;
978 unsigned metadata_ratio;
979
980 void *bdev_holder;
981};
982
983
984
985
986
987struct btrfs_root {
988 struct extent_buffer *node;
989
990
991 spinlock_t node_lock;
992
993 struct extent_buffer *commit_root;
994 struct btrfs_root *log_root;
995 struct btrfs_root *reloc_root;
996
997 struct btrfs_root_item root_item;
998 struct btrfs_key root_key;
999 struct btrfs_fs_info *fs_info;
1000 struct extent_io_tree dirty_log_pages;
1001
1002 struct kobject root_kobj;
1003 struct completion kobj_unregister;
1004 struct mutex objectid_mutex;
1005
1006 struct mutex log_mutex;
1007 wait_queue_head_t log_writer_wait;
1008 wait_queue_head_t log_commit_wait[2];
1009 atomic_t log_writers;
1010 atomic_t log_commit[2];
1011 unsigned long log_transid;
1012 unsigned long last_log_commit;
1013 unsigned long log_batch;
1014 pid_t log_start_pid;
1015 bool log_multiple_pids;
1016
1017 u64 objectid;
1018 u64 last_trans;
1019
1020
1021 u32 sectorsize;
1022
1023
1024 u32 nodesize;
1025
1026
1027 u32 leafsize;
1028
1029 u32 stripesize;
1030
1031 u32 type;
1032
1033 u64 highest_objectid;
1034 int ref_cows;
1035 int track_dirty;
1036 int in_radix;
1037
1038 u64 defrag_trans_start;
1039 struct btrfs_key defrag_progress;
1040 struct btrfs_key defrag_max;
1041 int defrag_running;
1042 int defrag_level;
1043 char *name;
1044 int in_sysfs;
1045
1046
1047 struct list_head dirty_list;
1048
1049 struct list_head root_list;
1050
1051 spinlock_t list_lock;
1052 struct list_head orphan_list;
1053
1054 spinlock_t inode_lock;
1055
1056 struct rb_root inode_tree;
1057
1058
1059
1060
1061
1062 struct super_block anon_super;
1063};
1064
1065
1066
1067
1068
1069
1070#define BTRFS_INODE_ITEM_KEY 1
1071#define BTRFS_INODE_REF_KEY 12
1072#define BTRFS_XATTR_ITEM_KEY 24
1073#define BTRFS_ORPHAN_ITEM_KEY 48
1074
1075
1076
1077
1078
1079
1080#define BTRFS_DIR_LOG_ITEM_KEY 60
1081#define BTRFS_DIR_LOG_INDEX_KEY 72
1082#define BTRFS_DIR_ITEM_KEY 84
1083#define BTRFS_DIR_INDEX_KEY 96
1084
1085
1086
1087#define BTRFS_EXTENT_DATA_KEY 108
1088
1089
1090
1091
1092
1093#define BTRFS_EXTENT_CSUM_KEY 128
1094
1095
1096
1097
1098
1099#define BTRFS_ROOT_ITEM_KEY 132
1100
1101
1102
1103
1104
1105#define BTRFS_ROOT_BACKREF_KEY 144
1106
1107
1108
1109
1110
1111
1112#define BTRFS_ROOT_REF_KEY 156
1113
1114
1115
1116
1117
1118#define BTRFS_EXTENT_ITEM_KEY 168
1119
1120#define BTRFS_TREE_BLOCK_REF_KEY 176
1121
1122#define BTRFS_EXTENT_DATA_REF_KEY 178
1123
1124#define BTRFS_EXTENT_REF_V0_KEY 180
1125
1126#define BTRFS_SHARED_BLOCK_REF_KEY 182
1127
1128#define BTRFS_SHARED_DATA_REF_KEY 184
1129
1130
1131
1132
1133
1134#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1135
1136#define BTRFS_DEV_EXTENT_KEY 204
1137#define BTRFS_DEV_ITEM_KEY 216
1138#define BTRFS_CHUNK_ITEM_KEY 228
1139
1140
1141
1142
1143
1144#define BTRFS_STRING_ITEM_KEY 253
1145
1146#define BTRFS_MOUNT_NODATASUM (1 << 0)
1147#define BTRFS_MOUNT_NODATACOW (1 << 1)
1148#define BTRFS_MOUNT_NOBARRIER (1 << 2)
1149#define BTRFS_MOUNT_SSD (1 << 3)
1150#define BTRFS_MOUNT_DEGRADED (1 << 4)
1151#define BTRFS_MOUNT_COMPRESS (1 << 5)
1152#define BTRFS_MOUNT_NOTREELOG (1 << 6)
1153#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1154#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1155#define BTRFS_MOUNT_NOSSD (1 << 9)
1156#define BTRFS_MOUNT_DISCARD (1 << 10)
1157
1158#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1159#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1160#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1161 BTRFS_MOUNT_##opt)
1162
1163
1164
1165#define BTRFS_INODE_NODATASUM (1 << 0)
1166#define BTRFS_INODE_NODATACOW (1 << 1)
1167#define BTRFS_INODE_READONLY (1 << 2)
1168#define BTRFS_INODE_NOCOMPRESS (1 << 3)
1169#define BTRFS_INODE_PREALLOC (1 << 4)
1170#define BTRFS_INODE_SYNC (1 << 5)
1171#define BTRFS_INODE_IMMUTABLE (1 << 6)
1172#define BTRFS_INODE_APPEND (1 << 7)
1173#define BTRFS_INODE_NODUMP (1 << 8)
1174#define BTRFS_INODE_NOATIME (1 << 9)
1175#define BTRFS_INODE_DIRSYNC (1 << 10)
1176
1177
1178
1179
1180
1181
1182#define le8_to_cpu(v) (v)
1183#define cpu_to_le8(v) (v)
1184#define __le8 u8
1185
1186#define read_eb_member(eb, ptr, type, member, result) ( \
1187 read_extent_buffer(eb, (char *)(result), \
1188 ((unsigned long)(ptr)) + \
1189 offsetof(type, member), \
1190 sizeof(((type *)0)->member)))
1191
1192#define write_eb_member(eb, ptr, type, member, result) ( \
1193 write_extent_buffer(eb, (char *)(result), \
1194 ((unsigned long)(ptr)) + \
1195 offsetof(type, member), \
1196 sizeof(((type *)0)->member)))
1197
1198#ifndef BTRFS_SETGET_FUNCS
1199#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1200u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1201void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1202#endif
1203
1204#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1205static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1206{ \
1207 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1208 u##bits res = le##bits##_to_cpu(p->member); \
1209 kunmap_atomic(p, KM_USER0); \
1210 return res; \
1211} \
1212static inline void btrfs_set_##name(struct extent_buffer *eb, \
1213 u##bits val) \
1214{ \
1215 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1216 p->member = cpu_to_le##bits(val); \
1217 kunmap_atomic(p, KM_USER0); \
1218}
1219
1220#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1221static inline u##bits btrfs_##name(type *s) \
1222{ \
1223 return le##bits##_to_cpu(s->member); \
1224} \
1225static inline void btrfs_set_##name(type *s, u##bits val) \
1226{ \
1227 s->member = cpu_to_le##bits(val); \
1228}
1229
1230BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1231BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1232BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1233BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1234BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1235BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1236 start_offset, 64);
1237BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1238BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1239BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1240BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1241BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1242BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1243
1244BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1245BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1246 total_bytes, 64);
1247BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1248 bytes_used, 64);
1249BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1250 io_align, 32);
1251BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1252 io_width, 32);
1253BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1254 sector_size, 32);
1255BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1256BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1257 dev_group, 32);
1258BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1259 seek_speed, 8);
1260BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1261 bandwidth, 8);
1262BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1263 generation, 64);
1264
1265static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1266{
1267 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1268}
1269
1270static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1271{
1272 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1273}
1274
1275BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1276BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1277BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1278BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1279BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1280BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1281BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1282BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1283BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1284BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1285BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1286
1287static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1288{
1289 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1290}
1291
1292BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1293BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1294BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1295 stripe_len, 64);
1296BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1297 io_align, 32);
1298BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1299 io_width, 32);
1300BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1301 sector_size, 32);
1302BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1303BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1304 num_stripes, 16);
1305BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1306 sub_stripes, 16);
1307BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1308BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1309
1310static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1311 int nr)
1312{
1313 unsigned long offset = (unsigned long)c;
1314 offset += offsetof(struct btrfs_chunk, stripe);
1315 offset += nr * sizeof(struct btrfs_stripe);
1316 return (struct btrfs_stripe *)offset;
1317}
1318
1319static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1320{
1321 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1322}
1323
1324static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1325 struct btrfs_chunk *c, int nr)
1326{
1327 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1328}
1329
1330static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1331 struct btrfs_chunk *c, int nr,
1332 u64 val)
1333{
1334 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1335}
1336
1337static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1338 struct btrfs_chunk *c, int nr)
1339{
1340 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1341}
1342
1343static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1344 struct btrfs_chunk *c, int nr,
1345 u64 val)
1346{
1347 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1348}
1349
1350
1351BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1352 used, 64);
1353BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1354 used, 64);
1355BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1356 struct btrfs_block_group_item, chunk_objectid, 64);
1357
1358BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1359 struct btrfs_block_group_item, chunk_objectid, 64);
1360BTRFS_SETGET_FUNCS(disk_block_group_flags,
1361 struct btrfs_block_group_item, flags, 64);
1362BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1363 struct btrfs_block_group_item, flags, 64);
1364
1365
1366BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1367BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1368
1369
1370BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1371BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1372BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1373BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1374BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1375BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1376BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1377BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1378BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1379BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1380BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1381BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1382
1383static inline struct btrfs_timespec *
1384btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1385{
1386 unsigned long ptr = (unsigned long)inode_item;
1387 ptr += offsetof(struct btrfs_inode_item, atime);
1388 return (struct btrfs_timespec *)ptr;
1389}
1390
1391static inline struct btrfs_timespec *
1392btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1393{
1394 unsigned long ptr = (unsigned long)inode_item;
1395 ptr += offsetof(struct btrfs_inode_item, mtime);
1396 return (struct btrfs_timespec *)ptr;
1397}
1398
1399static inline struct btrfs_timespec *
1400btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1401{
1402 unsigned long ptr = (unsigned long)inode_item;
1403 ptr += offsetof(struct btrfs_inode_item, ctime);
1404 return (struct btrfs_timespec *)ptr;
1405}
1406
1407static inline struct btrfs_timespec *
1408btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1409{
1410 unsigned long ptr = (unsigned long)inode_item;
1411 ptr += offsetof(struct btrfs_inode_item, otime);
1412 return (struct btrfs_timespec *)ptr;
1413}
1414
1415BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1416BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1417
1418
1419BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1420 chunk_tree, 64);
1421BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1422 chunk_objectid, 64);
1423BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1424 chunk_offset, 64);
1425BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1426
1427static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1428{
1429 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1430 return (u8 *)((unsigned long)dev + ptr);
1431}
1432
1433BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1434BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1435 generation, 64);
1436BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1437
1438BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1439
1440
1441BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1442
1443static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1444 struct btrfs_tree_block_info *item,
1445 struct btrfs_disk_key *key)
1446{
1447 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1448}
1449
1450static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1451 struct btrfs_tree_block_info *item,
1452 struct btrfs_disk_key *key)
1453{
1454 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1455}
1456
1457BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1458 root, 64);
1459BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1460 objectid, 64);
1461BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1462 offset, 64);
1463BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1464 count, 32);
1465
1466BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1467 count, 32);
1468
1469BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1470 type, 8);
1471BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1472 offset, 64);
1473
1474static inline u32 btrfs_extent_inline_ref_size(int type)
1475{
1476 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1477 type == BTRFS_SHARED_BLOCK_REF_KEY)
1478 return sizeof(struct btrfs_extent_inline_ref);
1479 if (type == BTRFS_SHARED_DATA_REF_KEY)
1480 return sizeof(struct btrfs_shared_data_ref) +
1481 sizeof(struct btrfs_extent_inline_ref);
1482 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1483 return sizeof(struct btrfs_extent_data_ref) +
1484 offsetof(struct btrfs_extent_inline_ref, offset);
1485 BUG();
1486 return 0;
1487}
1488
1489BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1490BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1491 generation, 64);
1492BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1493BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1494
1495
1496BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1497BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1498
1499static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1500{
1501 unsigned long ptr;
1502 ptr = offsetof(struct btrfs_node, ptrs) +
1503 sizeof(struct btrfs_key_ptr) * nr;
1504 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1505}
1506
1507static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1508 int nr, u64 val)
1509{
1510 unsigned long ptr;
1511 ptr = offsetof(struct btrfs_node, ptrs) +
1512 sizeof(struct btrfs_key_ptr) * nr;
1513 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1514}
1515
1516static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1517{
1518 unsigned long ptr;
1519 ptr = offsetof(struct btrfs_node, ptrs) +
1520 sizeof(struct btrfs_key_ptr) * nr;
1521 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1522}
1523
1524static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1525 int nr, u64 val)
1526{
1527 unsigned long ptr;
1528 ptr = offsetof(struct btrfs_node, ptrs) +
1529 sizeof(struct btrfs_key_ptr) * nr;
1530 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1531}
1532
1533static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1534{
1535 return offsetof(struct btrfs_node, ptrs) +
1536 sizeof(struct btrfs_key_ptr) * nr;
1537}
1538
1539void btrfs_node_key(struct extent_buffer *eb,
1540 struct btrfs_disk_key *disk_key, int nr);
1541
1542static inline void btrfs_set_node_key(struct extent_buffer *eb,
1543 struct btrfs_disk_key *disk_key, int nr)
1544{
1545 unsigned long ptr;
1546 ptr = btrfs_node_key_ptr_offset(nr);
1547 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1548 struct btrfs_key_ptr, key, disk_key);
1549}
1550
1551
1552BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1553BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1554
1555static inline unsigned long btrfs_item_nr_offset(int nr)
1556{
1557 return offsetof(struct btrfs_leaf, items) +
1558 sizeof(struct btrfs_item) * nr;
1559}
1560
1561static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1562 int nr)
1563{
1564 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1565}
1566
1567static inline u32 btrfs_item_end(struct extent_buffer *eb,
1568 struct btrfs_item *item)
1569{
1570 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1571}
1572
1573static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1574{
1575 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1576}
1577
1578static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1579{
1580 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1581}
1582
1583static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1584{
1585 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1586}
1587
1588static inline void btrfs_item_key(struct extent_buffer *eb,
1589 struct btrfs_disk_key *disk_key, int nr)
1590{
1591 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1592 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1593}
1594
1595static inline void btrfs_set_item_key(struct extent_buffer *eb,
1596 struct btrfs_disk_key *disk_key, int nr)
1597{
1598 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1599 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1600}
1601
1602BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1603
1604
1605
1606
1607BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1608BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1609BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1610
1611
1612BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1613BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1614BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1615BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1616
1617static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1618 struct btrfs_dir_item *item,
1619 struct btrfs_disk_key *key)
1620{
1621 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1622}
1623
1624static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1625 struct btrfs_dir_item *item,
1626 struct btrfs_disk_key *key)
1627{
1628 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1629}
1630
1631
1632BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1633 objectid, 64);
1634BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1635BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1636
1637static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1638 struct btrfs_disk_key *disk)
1639{
1640 cpu->offset = le64_to_cpu(disk->offset);
1641 cpu->type = disk->type;
1642 cpu->objectid = le64_to_cpu(disk->objectid);
1643}
1644
1645static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1646 struct btrfs_key *cpu)
1647{
1648 disk->offset = cpu_to_le64(cpu->offset);
1649 disk->type = cpu->type;
1650 disk->objectid = cpu_to_le64(cpu->objectid);
1651}
1652
1653static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1654 struct btrfs_key *key, int nr)
1655{
1656 struct btrfs_disk_key disk_key;
1657 btrfs_node_key(eb, &disk_key, nr);
1658 btrfs_disk_key_to_cpu(key, &disk_key);
1659}
1660
1661static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1662 struct btrfs_key *key, int nr)
1663{
1664 struct btrfs_disk_key disk_key;
1665 btrfs_item_key(eb, &disk_key, nr);
1666 btrfs_disk_key_to_cpu(key, &disk_key);
1667}
1668
1669static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1670 struct btrfs_dir_item *item,
1671 struct btrfs_key *key)
1672{
1673 struct btrfs_disk_key disk_key;
1674 btrfs_dir_item_key(eb, item, &disk_key);
1675 btrfs_disk_key_to_cpu(key, &disk_key);
1676}
1677
1678
1679static inline u8 btrfs_key_type(struct btrfs_key *key)
1680{
1681 return key->type;
1682}
1683
1684static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1685{
1686 key->type = val;
1687}
1688
1689
1690BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1691BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1692 generation, 64);
1693BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1694BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1695BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1696BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1697
1698static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1699{
1700 return (btrfs_header_flags(eb) & flag) == flag;
1701}
1702
1703static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1704{
1705 u64 flags = btrfs_header_flags(eb);
1706 btrfs_set_header_flags(eb, flags | flag);
1707 return (flags & flag) == flag;
1708}
1709
1710static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1711{
1712 u64 flags = btrfs_header_flags(eb);
1713 btrfs_set_header_flags(eb, flags & ~flag);
1714 return (flags & flag) == flag;
1715}
1716
1717static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1718{
1719 u64 flags = btrfs_header_flags(eb);
1720 return flags >> BTRFS_BACKREF_REV_SHIFT;
1721}
1722
1723static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1724 int rev)
1725{
1726 u64 flags = btrfs_header_flags(eb);
1727 flags &= ~BTRFS_BACKREF_REV_MASK;
1728 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1729 btrfs_set_header_flags(eb, flags);
1730}
1731
1732static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1733{
1734 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1735 return (u8 *)ptr;
1736}
1737
1738static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1739{
1740 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1741 return (u8 *)ptr;
1742}
1743
1744static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1745{
1746 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1747 return (u8 *)ptr;
1748}
1749
1750static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1751{
1752 unsigned long ptr = offsetof(struct btrfs_header, csum);
1753 return (u8 *)ptr;
1754}
1755
1756static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1757{
1758 return NULL;
1759}
1760
1761static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1762{
1763 return NULL;
1764}
1765
1766static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1767{
1768 return NULL;
1769}
1770
1771static inline int btrfs_is_leaf(struct extent_buffer *eb)
1772{
1773 return btrfs_header_level(eb) == 0;
1774}
1775
1776
1777BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1778 generation, 64);
1779BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1780BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1781BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1782
1783BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1784 generation, 64);
1785BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1786BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1787BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1788BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1789BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1790BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1791BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1792BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1793 last_snapshot, 64);
1794
1795
1796
1797BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1798BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1799BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1800 generation, 64);
1801BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1802BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1803 struct btrfs_super_block, sys_chunk_array_size, 32);
1804BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1805 struct btrfs_super_block, chunk_root_generation, 64);
1806BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1807 root_level, 8);
1808BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1809 chunk_root, 64);
1810BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1811 chunk_root_level, 8);
1812BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1813 log_root, 64);
1814BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1815 log_root_transid, 64);
1816BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1817 log_root_level, 8);
1818BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1819 total_bytes, 64);
1820BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1821 bytes_used, 64);
1822BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1823 sectorsize, 32);
1824BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1825 nodesize, 32);
1826BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1827 leafsize, 32);
1828BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1829 stripesize, 32);
1830BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1831 root_dir_objectid, 64);
1832BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1833 num_devices, 64);
1834BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1835 compat_flags, 64);
1836BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1837 compat_flags, 64);
1838BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1839 incompat_flags, 64);
1840BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1841 csum_type, 16);
1842
1843static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1844{
1845 int t = btrfs_super_csum_type(s);
1846 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1847 return btrfs_csum_sizes[t];
1848}
1849
1850static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1851{
1852 return offsetof(struct btrfs_leaf, items);
1853}
1854
1855
1856BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1857
1858static inline unsigned long
1859btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
1860{
1861 unsigned long offset = (unsigned long)e;
1862 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1863 return offset;
1864}
1865
1866static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1867{
1868 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1869}
1870
1871BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1872 disk_bytenr, 64);
1873BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1874 generation, 64);
1875BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1876 disk_num_bytes, 64);
1877BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1878 offset, 64);
1879BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1880 num_bytes, 64);
1881BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1882 ram_bytes, 64);
1883BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1884 compression, 8);
1885BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1886 encryption, 8);
1887BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1888 other_encoding, 16);
1889
1890
1891
1892
1893static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1894 struct btrfs_file_extent_item *e)
1895{
1896 return btrfs_file_extent_ram_bytes(eb, e);
1897}
1898
1899
1900
1901
1902
1903
1904static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1905 struct btrfs_item *e)
1906{
1907 unsigned long offset;
1908 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1909 return btrfs_item_size(eb, e) - offset;
1910}
1911
1912static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1913{
1914 return sb->s_fs_info;
1915}
1916
1917static inline int btrfs_set_root_name(struct btrfs_root *root,
1918 const char *name, int len)
1919{
1920
1921 kfree(root->name);
1922
1923 root->name = kmalloc(len+1, GFP_KERNEL);
1924 if (!root->name)
1925 return -ENOMEM;
1926
1927 memcpy(root->name, name, len);
1928 root->name[len] = '\0';
1929
1930 return 0;
1931}
1932
1933static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1934{
1935 if (level == 0)
1936 return root->leafsize;
1937 return root->nodesize;
1938}
1939
1940
1941#define btrfs_item_ptr(leaf, slot, type) \
1942 ((type *)(btrfs_leaf_data(leaf) + \
1943 btrfs_item_offset_nr(leaf, slot)))
1944
1945#define btrfs_item_ptr_offset(leaf, slot) \
1946 ((unsigned long)(btrfs_leaf_data(leaf) + \
1947 btrfs_item_offset_nr(leaf, slot)))
1948
1949static inline struct dentry *fdentry(struct file *file)
1950{
1951 return file->f_path.dentry;
1952}
1953
1954
1955void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
1956int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1957 struct btrfs_root *root, unsigned long count);
1958int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1959int btrfs_pin_extent(struct btrfs_root *root,
1960 u64 bytenr, u64 num, int reserved);
1961int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1962 struct btrfs_root *root, struct extent_buffer *leaf);
1963int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1964 struct btrfs_root *root,
1965 u64 objectid, u64 offset, u64 bytenr);
1966int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1967struct btrfs_block_group_cache *btrfs_lookup_block_group(
1968 struct btrfs_fs_info *info,
1969 u64 bytenr);
1970void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
1971u64 btrfs_find_block_group(struct btrfs_root *root,
1972 u64 search_start, u64 search_hint, int owner);
1973struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1974 struct btrfs_root *root, u32 blocksize,
1975 u64 parent, u64 root_objectid,
1976 struct btrfs_disk_key *key, int level,
1977 u64 hint, u64 empty_size);
1978struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1979 struct btrfs_root *root,
1980 u64 bytenr, u32 blocksize,
1981 int level);
1982int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
1983 struct btrfs_root *root,
1984 u64 root_objectid, u64 owner,
1985 u64 offset, struct btrfs_key *ins);
1986int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
1987 struct btrfs_root *root,
1988 u64 root_objectid, u64 owner, u64 offset,
1989 struct btrfs_key *ins);
1990int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1991 struct btrfs_root *root,
1992 u64 num_bytes, u64 min_alloc_size,
1993 u64 empty_size, u64 hint_byte,
1994 u64 search_end, struct btrfs_key *ins,
1995 u64 data);
1996int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1997 struct extent_buffer *buf, int full_backref);
1998int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1999 struct extent_buffer *buf, int full_backref);
2000int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2001 struct btrfs_root *root,
2002 u64 bytenr, u64 num_bytes, u64 flags,
2003 int is_data);
2004int btrfs_free_extent(struct btrfs_trans_handle *trans,
2005 struct btrfs_root *root,
2006 u64 bytenr, u64 num_bytes, u64 parent,
2007 u64 root_objectid, u64 owner, u64 offset);
2008
2009int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2010int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2011 struct btrfs_root *root);
2012int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root);
2014int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2015 struct btrfs_root *root,
2016 u64 bytenr, u64 num_bytes, u64 parent,
2017 u64 root_objectid, u64 owner, u64 offset);
2018
2019int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2020 struct btrfs_root *root);
2021int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2022int btrfs_free_block_groups(struct btrfs_fs_info *info);
2023int btrfs_read_block_groups(struct btrfs_root *root);
2024int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2025int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root, u64 bytes_used,
2027 u64 type, u64 chunk_objectid, u64 chunk_offset,
2028 u64 size);
2029int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2030 struct btrfs_root *root, u64 group_start);
2031int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
2032 struct btrfs_block_group_cache *group);
2033
2034u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2035void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2036void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2037
2038int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items);
2039int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
2040int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
2041 struct inode *inode, int num_items);
2042int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
2043 struct inode *inode, int num_items);
2044int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
2045 u64 bytes);
2046void btrfs_free_reserved_data_space(struct btrfs_root *root,
2047 struct inode *inode, u64 bytes);
2048void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
2049 u64 bytes);
2050void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
2051 u64 bytes);
2052
2053int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2054 int level, int *slot);
2055int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2056int btrfs_previous_item(struct btrfs_root *root,
2057 struct btrfs_path *path, u64 min_objectid,
2058 int type);
2059int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2060 struct btrfs_root *root, struct btrfs_path *path,
2061 struct btrfs_key *new_key);
2062struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2063struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2064int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2065 struct btrfs_key *key, int lowest_level,
2066 int cache_only, u64 min_trans);
2067int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2068 struct btrfs_key *max_key,
2069 struct btrfs_path *path, int cache_only,
2070 u64 min_trans);
2071int btrfs_cow_block(struct btrfs_trans_handle *trans,
2072 struct btrfs_root *root, struct extent_buffer *buf,
2073 struct extent_buffer *parent, int parent_slot,
2074 struct extent_buffer **cow_ret);
2075int btrfs_copy_root(struct btrfs_trans_handle *trans,
2076 struct btrfs_root *root,
2077 struct extent_buffer *buf,
2078 struct extent_buffer **cow_ret, u64 new_root_objectid);
2079int btrfs_block_can_be_shared(struct btrfs_root *root,
2080 struct extent_buffer *buf);
2081int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2082 *root, struct btrfs_path *path, u32 data_size);
2083int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2084 struct btrfs_root *root,
2085 struct btrfs_path *path,
2086 u32 new_size, int from_end);
2087int btrfs_split_item(struct btrfs_trans_handle *trans,
2088 struct btrfs_root *root,
2089 struct btrfs_path *path,
2090 struct btrfs_key *new_key,
2091 unsigned long split_offset);
2092int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2093 *root, struct btrfs_key *key, struct btrfs_path *p, int
2094 ins_len, int cow);
2095int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2096 struct btrfs_root *root, struct extent_buffer *parent,
2097 int start_slot, int cache_only, u64 *last_ret,
2098 struct btrfs_key *progress);
2099void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2100struct btrfs_path *btrfs_alloc_path(void);
2101void btrfs_free_path(struct btrfs_path *p);
2102void btrfs_set_path_blocking(struct btrfs_path *p);
2103void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2104
2105int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2106 struct btrfs_path *path, int slot, int nr);
2107static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2108 struct btrfs_root *root,
2109 struct btrfs_path *path)
2110{
2111 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2112}
2113
2114int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2115 *root, struct btrfs_key *key, void *data, u32 data_size);
2116int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2117 struct btrfs_root *root,
2118 struct btrfs_path *path,
2119 struct btrfs_key *cpu_key, u32 *data_size,
2120 int nr);
2121int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2122 struct btrfs_root *root,
2123 struct btrfs_path *path,
2124 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2125
2126static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2127 struct btrfs_root *root,
2128 struct btrfs_path *path,
2129 struct btrfs_key *key,
2130 u32 data_size)
2131{
2132 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2133}
2134
2135int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2136int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2137int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2138int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref);
2139int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2140 struct btrfs_root *root,
2141 struct extent_buffer *node,
2142 struct extent_buffer *parent);
2143
2144int btrfs_find_root_ref(struct btrfs_root *tree_root,
2145 struct btrfs_path *path,
2146 u64 root_id, u64 ref_id);
2147int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2148 struct btrfs_root *tree_root,
2149 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2150 const char *name, int name_len);
2151int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2152 struct btrfs_root *tree_root,
2153 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2154 const char *name, int name_len);
2155int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2156 struct btrfs_key *key);
2157int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2158 *root, struct btrfs_key *key, struct btrfs_root_item
2159 *item);
2160int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2161 *root, struct btrfs_key *key, struct btrfs_root_item
2162 *item);
2163int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2164 btrfs_root_item *item, struct btrfs_key *key);
2165int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2166 u64 *found_objectid);
2167int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2168int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2169int btrfs_set_root_node(struct btrfs_root_item *item,
2170 struct extent_buffer *node);
2171
2172int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root, const char *name,
2174 int name_len, u64 dir,
2175 struct btrfs_key *location, u8 type, u64 index);
2176struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2177 struct btrfs_root *root,
2178 struct btrfs_path *path, u64 dir,
2179 const char *name, int name_len,
2180 int mod);
2181struct btrfs_dir_item *
2182btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2183 struct btrfs_root *root,
2184 struct btrfs_path *path, u64 dir,
2185 u64 objectid, const char *name, int name_len,
2186 int mod);
2187struct btrfs_dir_item *
2188btrfs_search_dir_index_item(struct btrfs_root *root,
2189 struct btrfs_path *path, u64 dirid,
2190 const char *name, int name_len);
2191struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2192 struct btrfs_path *path,
2193 const char *name, int name_len);
2194int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2195 struct btrfs_root *root,
2196 struct btrfs_path *path,
2197 struct btrfs_dir_item *di);
2198int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root, const char *name,
2200 u16 name_len, const void *data, u16 data_len,
2201 u64 dir);
2202struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2203 struct btrfs_root *root,
2204 struct btrfs_path *path, u64 dir,
2205 const char *name, u16 name_len,
2206 int mod);
2207
2208
2209int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root, u64 offset);
2211int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2212 struct btrfs_root *root, u64 offset);
2213int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2214
2215
2216int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2217 struct btrfs_root *fs_root,
2218 u64 dirid, u64 *objectid);
2219int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2220
2221
2222int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2223 struct btrfs_root *root,
2224 const char *name, int name_len,
2225 u64 inode_objectid, u64 ref_objectid, u64 index);
2226int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2227 struct btrfs_root *root,
2228 const char *name, int name_len,
2229 u64 inode_objectid, u64 ref_objectid, u64 *index);
2230int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2231 struct btrfs_root *root,
2232 struct btrfs_path *path, u64 objectid);
2233int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2234 *root, struct btrfs_path *path,
2235 struct btrfs_key *location, int mod);
2236
2237
2238int btrfs_del_csums(struct btrfs_trans_handle *trans,
2239 struct btrfs_root *root, u64 bytenr, u64 len);
2240int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2241 struct bio *bio, u32 *dst);
2242int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2243 struct btrfs_root *root,
2244 u64 objectid, u64 pos,
2245 u64 disk_offset, u64 disk_num_bytes,
2246 u64 num_bytes, u64 offset, u64 ram_bytes,
2247 u8 compression, u8 encryption, u16 other_encoding);
2248int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2249 struct btrfs_root *root,
2250 struct btrfs_path *path, u64 objectid,
2251 u64 bytenr, int mod);
2252int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2253 struct btrfs_root *root,
2254 struct btrfs_ordered_sum *sums);
2255int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2256 struct bio *bio, u64 file_start, int contig);
2257int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2258 u64 start, unsigned long len);
2259struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2260 struct btrfs_root *root,
2261 struct btrfs_path *path,
2262 u64 bytenr, int cow);
2263int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root, struct btrfs_path *path,
2265 u64 isize);
2266int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2267 u64 end, struct list_head *list);
2268
2269
2270
2271#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2272#define ClearPageChecked ClearPageFsMisc
2273#define SetPageChecked SetPageFsMisc
2274#define PageChecked PageFsMisc
2275#endif
2276
2277struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2278int btrfs_set_inode_index(struct inode *dir, u64 *index);
2279int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2280 struct btrfs_root *root,
2281 struct inode *dir, struct inode *inode,
2282 const char *name, int name_len);
2283int btrfs_add_link(struct btrfs_trans_handle *trans,
2284 struct inode *parent_inode, struct inode *inode,
2285 const char *name, int name_len, int add_backref, u64 index);
2286int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2287 struct btrfs_root *root,
2288 struct inode *dir, u64 objectid,
2289 const char *name, int name_len);
2290int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2291 struct btrfs_root *root,
2292 struct inode *inode, u64 new_size,
2293 u32 min_type);
2294
2295int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2296int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
2297int btrfs_writepages(struct address_space *mapping,
2298 struct writeback_control *wbc);
2299int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2300 struct btrfs_root *new_root,
2301 u64 new_dirid, u64 alloc_hint);
2302int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
2303 size_t size, struct bio *bio, unsigned long bio_flags);
2304
2305unsigned long btrfs_force_ra(struct address_space *mapping,
2306 struct file_ra_state *ra, struct file *file,
2307 pgoff_t offset, pgoff_t last_index);
2308int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2309int btrfs_readpage(struct file *file, struct page *page);
2310void btrfs_delete_inode(struct inode *inode);
2311void btrfs_put_inode(struct inode *inode);
2312int btrfs_write_inode(struct inode *inode, int wait);
2313void btrfs_dirty_inode(struct inode *inode);
2314struct inode *btrfs_alloc_inode(struct super_block *sb);
2315void btrfs_destroy_inode(struct inode *inode);
2316void btrfs_drop_inode(struct inode *inode);
2317int btrfs_init_cachep(void);
2318void btrfs_destroy_cachep(void);
2319long btrfs_ioctl_trans_end(struct file *file);
2320struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2321 struct btrfs_root *root);
2322int btrfs_commit_write(struct file *file, struct page *page,
2323 unsigned from, unsigned to);
2324struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2325 size_t page_offset, u64 start, u64 end,
2326 int create);
2327int btrfs_update_inode(struct btrfs_trans_handle *trans,
2328 struct btrfs_root *root,
2329 struct inode *inode);
2330int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2331int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2332void btrfs_orphan_cleanup(struct btrfs_root *root);
2333int btrfs_cont_expand(struct inode *inode, loff_t size);
2334int btrfs_invalidate_inodes(struct btrfs_root *root);
2335extern const struct dentry_operations btrfs_dentry_operations;
2336
2337
2338long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2339void btrfs_update_iflags(struct inode *inode);
2340void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
2341
2342
2343int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
2344int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2345 int skip_pinned);
2346int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2347extern const struct file_operations btrfs_file_operations;
2348int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2349 struct btrfs_root *root, struct inode *inode,
2350 u64 start, u64 end, u64 locked_end,
2351 u64 inline_limit, u64 *hint_block, int drop_cache);
2352int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *root,
2354 struct inode *inode, u64 start, u64 end);
2355int btrfs_release_file(struct inode *inode, struct file *file);
2356
2357
2358int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2359 struct btrfs_root *root, int cache_only);
2360
2361
2362int btrfs_init_sysfs(void);
2363void btrfs_exit_sysfs(void);
2364int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2365int btrfs_sysfs_add_root(struct btrfs_root *root);
2366void btrfs_sysfs_del_root(struct btrfs_root *root);
2367void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2368
2369
2370ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2371
2372
2373u64 btrfs_parse_size(char *str);
2374int btrfs_parse_options(struct btrfs_root *root, char *options);
2375int btrfs_sync_fs(struct super_block *sb, int wait);
2376
2377
2378#ifdef CONFIG_BTRFS_FS_POSIX_ACL
2379int btrfs_check_acl(struct inode *inode, int mask);
2380#else
2381#define btrfs_check_acl NULL
2382#endif
2383int btrfs_init_acl(struct inode *inode, struct inode *dir);
2384int btrfs_acl_chmod(struct inode *inode);
2385
2386
2387int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2388int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2389 struct btrfs_root *root);
2390int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2391 struct btrfs_root *root);
2392int btrfs_recover_relocation(struct btrfs_root *root);
2393int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2394#endif
2395