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7
8#ifndef __BTRFS_TREE_H__
9#define __BTRFS_TREE_H__
10
11#include <linux/types.h>
12
13#define BTRFS_MAGIC 0x4D5F53665248425FULL
14
15
16
17
18
19
20
21#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
22
23
24
25
26
27
28
29#define BTRFS_NAME_LEN 255
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44#define BTRFS_ROOT_TREE_OBJECTID 1ULL
45
46
47
48
49
50#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
51
52
53
54
55
56
57
58#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
59
60
61
62
63
64#define BTRFS_DEV_TREE_OBJECTID 4ULL
65
66
67#define BTRFS_FS_TREE_OBJECTID 5ULL
68
69
70#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
71
72
73#define BTRFS_CSUM_TREE_OBJECTID 7ULL
74
75
76#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
77
78
79#define BTRFS_UUID_TREE_OBJECTID 9ULL
80
81
82#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
83
84
85#define BTRFS_DEV_STATS_OBJECTID 0ULL
86
87
88#define BTRFS_BALANCE_OBJECTID -4ULL
89
90
91#define BTRFS_ORPHAN_OBJECTID -5ULL
92
93
94#define BTRFS_TREE_LOG_OBJECTID -6ULL
95#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
96
97
98#define BTRFS_TREE_RELOC_OBJECTID -8ULL
99#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
100
101
102#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103
104
105#define BTRFS_FREE_SPACE_OBJECTID -11ULL
106
107
108#define BTRFS_FREE_INO_OBJECTID -12ULL
109
110
111#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
112
113
114#define BTRFS_FIRST_FREE_OBJECTID 256ULL
115#define BTRFS_LAST_FREE_OBJECTID -256ULL
116#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
117
118
119
120
121
122
123
124
125#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
126
127#define BTRFS_BTREE_INODE_OBJECTID 1
128
129#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
130
131#define BTRFS_DEV_REPLACE_DEVID 0ULL
132
133
134
135
136
137
138
139
140
141
142
143
144
145#define BTRFS_INODE_ITEM_KEY 1
146
147#define BTRFS_INODE_REF_KEY 12
148#define BTRFS_INODE_EXTREF_KEY 13
149#define BTRFS_XATTR_ITEM_KEY 24
150#define BTRFS_ORPHAN_ITEM_KEY 48
151
152
153
154
155
156
157#define BTRFS_DIR_LOG_ITEM_KEY 60
158#define BTRFS_DIR_LOG_INDEX_KEY 72
159#define BTRFS_DIR_ITEM_KEY 84
160#define BTRFS_DIR_INDEX_KEY 96
161
162
163#define BTRFS_EXTENT_DATA_KEY 108
164
165
166
167
168
169#define BTRFS_EXTENT_CSUM_KEY 128
170
171
172
173
174
175
176
177#define BTRFS_ROOT_ITEM_KEY 132
178
179
180
181
182
183#define BTRFS_ROOT_BACKREF_KEY 144
184
185
186
187
188
189
190#define BTRFS_ROOT_REF_KEY 156
191
192
193
194
195
196
197#define BTRFS_EXTENT_ITEM_KEY 168
198
199
200
201
202
203#define BTRFS_METADATA_ITEM_KEY 169
204
205#define BTRFS_TREE_BLOCK_REF_KEY 176
206
207#define BTRFS_EXTENT_DATA_REF_KEY 178
208
209#define BTRFS_EXTENT_REF_V0_KEY 180
210
211#define BTRFS_SHARED_BLOCK_REF_KEY 182
212
213#define BTRFS_SHARED_DATA_REF_KEY 184
214
215
216
217
218
219
220#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
221
222
223
224
225
226
227#define BTRFS_FREE_SPACE_INFO_KEY 198
228
229
230
231
232
233#define BTRFS_FREE_SPACE_EXTENT_KEY 199
234
235
236
237
238
239
240
241
242#define BTRFS_FREE_SPACE_BITMAP_KEY 200
243
244#define BTRFS_DEV_EXTENT_KEY 204
245#define BTRFS_DEV_ITEM_KEY 216
246#define BTRFS_CHUNK_ITEM_KEY 228
247
248
249
250
251
252
253
254#define BTRFS_QGROUP_STATUS_KEY 240
255
256
257
258
259
260#define BTRFS_QGROUP_INFO_KEY 242
261
262
263
264
265
266
267#define BTRFS_QGROUP_LIMIT_KEY 244
268
269
270
271
272
273
274
275#define BTRFS_QGROUP_RELATION_KEY 246
276
277
278#define BTRFS_BALANCE_ITEM_KEY 248
279
280
281
282
283
284
285
286
287
288
289
290
291#define BTRFS_TEMPORARY_ITEM_KEY 248
292
293
294#define BTRFS_DEV_STATS_KEY 249
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309#define BTRFS_PERSISTENT_ITEM_KEY 249
310
311
312
313
314
315
316#define BTRFS_DEV_REPLACE_KEY 250
317
318
319
320
321
322
323
324
325#define BTRFS_UUID_KEY_SUBVOL 251
326#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252
327
328
329
330
331
332
333
334#define BTRFS_STRING_ITEM_KEY 253
335
336
337
338
339#define BTRFS_CSUM_SIZE 32
340
341
342enum btrfs_csum_type {
343 BTRFS_CSUM_TYPE_CRC32 = 0,
344 BTRFS_CSUM_TYPE_XXHASH = 1,
345 BTRFS_CSUM_TYPE_SHA256 = 2,
346 BTRFS_CSUM_TYPE_BLAKE2 = 3,
347};
348
349
350
351
352
353
354
355
356
357#define BTRFS_FT_UNKNOWN 0
358#define BTRFS_FT_REG_FILE 1
359#define BTRFS_FT_DIR 2
360#define BTRFS_FT_CHRDEV 3
361#define BTRFS_FT_BLKDEV 4
362#define BTRFS_FT_FIFO 5
363#define BTRFS_FT_SOCK 6
364#define BTRFS_FT_SYMLINK 7
365#define BTRFS_FT_XATTR 8
366#define BTRFS_FT_MAX 9
367
368#define BTRFS_FSID_SIZE 16
369#define BTRFS_UUID_SIZE 16
370
371
372
373
374
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376
377
378
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381
382
383
384
385
386
387struct btrfs_disk_key {
388 __le64 objectid;
389 __u8 type;
390 __le64 offset;
391} __attribute__ ((__packed__));
392
393struct btrfs_key {
394 __u64 objectid;
395 __u8 type;
396 __u64 offset;
397} __attribute__ ((__packed__));
398
399struct btrfs_dev_item {
400
401 __le64 devid;
402
403
404 __le64 total_bytes;
405
406
407 __le64 bytes_used;
408
409
410 __le32 io_align;
411
412
413 __le32 io_width;
414
415
416 __le32 sector_size;
417
418
419 __le64 type;
420
421
422 __le64 generation;
423
424
425
426
427
428 __le64 start_offset;
429
430
431 __le32 dev_group;
432
433
434 __u8 seek_speed;
435
436
437 __u8 bandwidth;
438
439
440 __u8 uuid[BTRFS_UUID_SIZE];
441
442
443 __u8 fsid[BTRFS_UUID_SIZE];
444} __attribute__ ((__packed__));
445
446struct btrfs_stripe {
447 __le64 devid;
448 __le64 offset;
449 __u8 dev_uuid[BTRFS_UUID_SIZE];
450} __attribute__ ((__packed__));
451
452struct btrfs_chunk {
453
454 __le64 length;
455
456
457 __le64 owner;
458
459 __le64 stripe_len;
460 __le64 type;
461
462
463 __le32 io_align;
464
465
466 __le32 io_width;
467
468
469 __le32 sector_size;
470
471
472
473
474
475 __le16 num_stripes;
476
477
478 __le16 sub_stripes;
479 struct btrfs_stripe stripe;
480
481} __attribute__ ((__packed__));
482
483#define BTRFS_FREE_SPACE_EXTENT 1
484#define BTRFS_FREE_SPACE_BITMAP 2
485
486struct btrfs_free_space_entry {
487 __le64 offset;
488 __le64 bytes;
489 __u8 type;
490} __attribute__ ((__packed__));
491
492struct btrfs_free_space_header {
493 struct btrfs_disk_key location;
494 __le64 generation;
495 __le64 num_entries;
496 __le64 num_bitmaps;
497} __attribute__ ((__packed__));
498
499#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
500#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
501
502
503
504#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
505
506#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
507#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
508#define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
509#define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
510#define BTRFS_SUPER_FLAG_CHANGING_FSID_V2 (1ULL << 36)
511
512
513
514
515
516
517struct btrfs_extent_item {
518 __le64 refs;
519 __le64 generation;
520 __le64 flags;
521} __attribute__ ((__packed__));
522
523struct btrfs_extent_item_v0 {
524 __le32 refs;
525} __attribute__ ((__packed__));
526
527
528#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
529#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
530
531
532#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
533
534
535
536
537
538#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
539
540struct btrfs_tree_block_info {
541 struct btrfs_disk_key key;
542 __u8 level;
543} __attribute__ ((__packed__));
544
545struct btrfs_extent_data_ref {
546 __le64 root;
547 __le64 objectid;
548 __le64 offset;
549 __le32 count;
550} __attribute__ ((__packed__));
551
552struct btrfs_shared_data_ref {
553 __le32 count;
554} __attribute__ ((__packed__));
555
556struct btrfs_extent_inline_ref {
557 __u8 type;
558 __le64 offset;
559} __attribute__ ((__packed__));
560
561
562struct btrfs_extent_ref_v0 {
563 __le64 root;
564 __le64 generation;
565 __le64 objectid;
566 __le32 count;
567} __attribute__ ((__packed__));
568
569
570
571
572
573
574
575
576struct btrfs_dev_extent {
577 __le64 chunk_tree;
578 __le64 chunk_objectid;
579 __le64 chunk_offset;
580 __le64 length;
581 __u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
582} __attribute__ ((__packed__));
583
584struct btrfs_inode_ref {
585 __le64 index;
586 __le16 name_len;
587
588} __attribute__ ((__packed__));
589
590struct btrfs_inode_extref {
591 __le64 parent_objectid;
592 __le64 index;
593 __le16 name_len;
594 __u8 name[0];
595
596} __attribute__ ((__packed__));
597
598struct btrfs_timespec {
599 __le64 sec;
600 __le32 nsec;
601} __attribute__ ((__packed__));
602
603
604#define BTRFS_INODE_NODATASUM (1 << 0)
605#define BTRFS_INODE_NODATACOW (1 << 1)
606#define BTRFS_INODE_READONLY (1 << 2)
607#define BTRFS_INODE_NOCOMPRESS (1 << 3)
608#define BTRFS_INODE_PREALLOC (1 << 4)
609#define BTRFS_INODE_SYNC (1 << 5)
610#define BTRFS_INODE_IMMUTABLE (1 << 6)
611#define BTRFS_INODE_APPEND (1 << 7)
612#define BTRFS_INODE_NODUMP (1 << 8)
613#define BTRFS_INODE_NOATIME (1 << 9)
614#define BTRFS_INODE_DIRSYNC (1 << 10)
615#define BTRFS_INODE_COMPRESS (1 << 11)
616
617#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
618
619#define BTRFS_INODE_FLAG_MASK \
620 (BTRFS_INODE_NODATASUM | \
621 BTRFS_INODE_NODATACOW | \
622 BTRFS_INODE_READONLY | \
623 BTRFS_INODE_NOCOMPRESS | \
624 BTRFS_INODE_PREALLOC | \
625 BTRFS_INODE_SYNC | \
626 BTRFS_INODE_IMMUTABLE | \
627 BTRFS_INODE_APPEND | \
628 BTRFS_INODE_NODUMP | \
629 BTRFS_INODE_NOATIME | \
630 BTRFS_INODE_DIRSYNC | \
631 BTRFS_INODE_COMPRESS | \
632 BTRFS_INODE_ROOT_ITEM_INIT)
633
634struct btrfs_inode_item {
635
636 __le64 generation;
637
638 __le64 transid;
639 __le64 size;
640 __le64 nbytes;
641 __le64 block_group;
642 __le32 nlink;
643 __le32 uid;
644 __le32 gid;
645 __le32 mode;
646 __le64 rdev;
647 __le64 flags;
648
649
650 __le64 sequence;
651
652
653
654
655
656 __le64 reserved[4];
657 struct btrfs_timespec atime;
658 struct btrfs_timespec ctime;
659 struct btrfs_timespec mtime;
660 struct btrfs_timespec otime;
661} __attribute__ ((__packed__));
662
663struct btrfs_dir_log_item {
664 __le64 end;
665} __attribute__ ((__packed__));
666
667struct btrfs_dir_item {
668 struct btrfs_disk_key location;
669 __le64 transid;
670 __le16 data_len;
671 __le16 name_len;
672 __u8 type;
673} __attribute__ ((__packed__));
674
675#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
676
677
678
679
680
681#define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
682
683struct btrfs_root_item {
684 struct btrfs_inode_item inode;
685 __le64 generation;
686 __le64 root_dirid;
687 __le64 bytenr;
688 __le64 byte_limit;
689 __le64 bytes_used;
690 __le64 last_snapshot;
691 __le64 flags;
692 __le32 refs;
693 struct btrfs_disk_key drop_progress;
694 __u8 drop_level;
695 __u8 level;
696
697
698
699
700
701
702
703
704
705
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707
708
709
710
711
712
713 __le64 generation_v2;
714 __u8 uuid[BTRFS_UUID_SIZE];
715 __u8 parent_uuid[BTRFS_UUID_SIZE];
716 __u8 received_uuid[BTRFS_UUID_SIZE];
717 __le64 ctransid;
718 __le64 otransid;
719 __le64 stransid;
720 __le64 rtransid;
721 struct btrfs_timespec ctime;
722 struct btrfs_timespec otime;
723 struct btrfs_timespec stime;
724 struct btrfs_timespec rtime;
725 __le64 reserved[8];
726} __attribute__ ((__packed__));
727
728
729struct btrfs_root_ref {
730 __le64 dirid;
731 __le64 sequence;
732 __le16 name_len;
733} __attribute__ ((__packed__));
734
735struct btrfs_disk_balance_args {
736
737
738
739
740
741 __le64 profiles;
742
743
744
745
746
747
748 union {
749 __le64 usage;
750 struct {
751 __le32 usage_min;
752 __le32 usage_max;
753 };
754 };
755
756
757 __le64 devid;
758
759
760 __le64 pstart;
761 __le64 pend;
762
763
764 __le64 vstart;
765 __le64 vend;
766
767
768
769
770
771
772 __le64 target;
773
774
775 __le64 flags;
776
777
778
779
780
781
782 union {
783 __le64 limit;
784 struct {
785 __le32 limit_min;
786 __le32 limit_max;
787 };
788 };
789
790
791
792
793
794 __le32 stripes_min;
795 __le32 stripes_max;
796
797 __le64 unused[6];
798} __attribute__ ((__packed__));
799
800
801
802
803
804struct btrfs_balance_item {
805
806 __le64 flags;
807
808 struct btrfs_disk_balance_args data;
809 struct btrfs_disk_balance_args meta;
810 struct btrfs_disk_balance_args sys;
811
812 __le64 unused[4];
813} __attribute__ ((__packed__));
814
815enum {
816 BTRFS_FILE_EXTENT_INLINE = 0,
817 BTRFS_FILE_EXTENT_REG = 1,
818 BTRFS_FILE_EXTENT_PREALLOC = 2,
819 BTRFS_NR_FILE_EXTENT_TYPES = 3,
820};
821
822enum btrfs_compression_type {
823 BTRFS_COMPRESS_NONE = 0,
824 BTRFS_COMPRESS_ZLIB = 1,
825 BTRFS_COMPRESS_LZO = 2,
826 BTRFS_COMPRESS_ZSTD = 3,
827 BTRFS_NR_COMPRESS_TYPES = 4,
828};
829
830struct btrfs_file_extent_item {
831
832 __le64 generation;
833
834
835
836
837
838
839
840 __le64 ram_bytes;
841
842
843
844
845
846
847
848
849 __u8 compression;
850 __u8 encryption;
851 __le16 other_encoding;
852
853
854 __u8 type;
855
856
857
858
859
860
861
862 __le64 disk_bytenr;
863 __le64 disk_num_bytes;
864
865
866
867
868
869
870
871
872 __le64 offset;
873
874
875
876
877
878
879
880 __le64 num_bytes;
881
882} __attribute__ ((__packed__));
883
884struct btrfs_csum_item {
885 __u8 csum;
886} __attribute__ ((__packed__));
887
888enum btrfs_dev_stat_values {
889
890 BTRFS_DEV_STAT_WRITE_ERRS,
891 BTRFS_DEV_STAT_READ_ERRS,
892 BTRFS_DEV_STAT_FLUSH_ERRS,
893
894
895 BTRFS_DEV_STAT_CORRUPTION_ERRS,
896
897
898
899
900
901 BTRFS_DEV_STAT_GENERATION_ERRS,
902
903
904 BTRFS_DEV_STAT_VALUES_MAX
905};
906
907struct btrfs_dev_stats_item {
908
909
910
911
912 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
913} __attribute__ ((__packed__));
914
915#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
916#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
917
918struct btrfs_dev_replace_item {
919
920
921
922
923 __le64 src_devid;
924 __le64 cursor_left;
925 __le64 cursor_right;
926 __le64 cont_reading_from_srcdev_mode;
927
928 __le64 replace_state;
929 __le64 time_started;
930 __le64 time_stopped;
931 __le64 num_write_errors;
932 __le64 num_uncorrectable_read_errors;
933} __attribute__ ((__packed__));
934
935
936#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
937#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
938#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
939#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
940#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
941#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
942#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
943#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
944#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
945#define BTRFS_BLOCK_GROUP_RAID1C3 (1ULL << 9)
946#define BTRFS_BLOCK_GROUP_RAID1C4 (1ULL << 10)
947#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
948 BTRFS_SPACE_INFO_GLOBAL_RSV)
949
950enum btrfs_raid_types {
951 BTRFS_RAID_RAID10,
952 BTRFS_RAID_RAID1,
953 BTRFS_RAID_DUP,
954 BTRFS_RAID_RAID0,
955 BTRFS_RAID_SINGLE,
956 BTRFS_RAID_RAID5,
957 BTRFS_RAID_RAID6,
958 BTRFS_RAID_RAID1C3,
959 BTRFS_RAID_RAID1C4,
960 BTRFS_NR_RAID_TYPES
961};
962
963#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
964 BTRFS_BLOCK_GROUP_SYSTEM | \
965 BTRFS_BLOCK_GROUP_METADATA)
966
967#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
968 BTRFS_BLOCK_GROUP_RAID1 | \
969 BTRFS_BLOCK_GROUP_RAID1C3 | \
970 BTRFS_BLOCK_GROUP_RAID1C4 | \
971 BTRFS_BLOCK_GROUP_RAID5 | \
972 BTRFS_BLOCK_GROUP_RAID6 | \
973 BTRFS_BLOCK_GROUP_DUP | \
974 BTRFS_BLOCK_GROUP_RAID10)
975#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
976 BTRFS_BLOCK_GROUP_RAID6)
977
978#define BTRFS_BLOCK_GROUP_RAID1_MASK (BTRFS_BLOCK_GROUP_RAID1 | \
979 BTRFS_BLOCK_GROUP_RAID1C3 | \
980 BTRFS_BLOCK_GROUP_RAID1C4)
981
982
983
984
985
986
987
988
989#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
990
991
992
993
994
995#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
996
997#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
998 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
999
1000static inline __u64 chunk_to_extended(__u64 flags)
1001{
1002 if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1003 flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1004
1005 return flags;
1006}
1007static inline __u64 extended_to_chunk(__u64 flags)
1008{
1009 return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1010}
1011
1012struct btrfs_block_group_item {
1013 __le64 used;
1014 __le64 chunk_objectid;
1015 __le64 flags;
1016} __attribute__ ((__packed__));
1017
1018struct btrfs_free_space_info {
1019 __le32 extent_count;
1020 __le32 flags;
1021} __attribute__ ((__packed__));
1022
1023#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1024
1025#define BTRFS_QGROUP_LEVEL_SHIFT 48
1026static inline __u64 btrfs_qgroup_level(__u64 qgroupid)
1027{
1028 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
1029}
1030
1031
1032#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1033
1034
1035#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1036
1037
1038
1039
1040
1041
1042#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1043
1044#define BTRFS_QGROUP_STATUS_VERSION 1
1045
1046struct btrfs_qgroup_status_item {
1047 __le64 version;
1048
1049
1050
1051
1052
1053
1054 __le64 generation;
1055
1056
1057 __le64 flags;
1058
1059
1060
1061
1062
1063 __le64 rescan;
1064} __attribute__ ((__packed__));
1065
1066struct btrfs_qgroup_info_item {
1067 __le64 generation;
1068 __le64 rfer;
1069 __le64 rfer_cmpr;
1070 __le64 excl;
1071 __le64 excl_cmpr;
1072} __attribute__ ((__packed__));
1073
1074
1075
1076
1077
1078
1079
1080
1081#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1082#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1083#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1084#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1085#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1086#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1087
1088struct btrfs_qgroup_limit_item {
1089
1090 __le64 flags;
1091 __le64 max_rfer;
1092 __le64 max_excl;
1093 __le64 rsv_rfer;
1094 __le64 rsv_excl;
1095} __attribute__ ((__packed__));
1096
1097
1098
1099
1100
1101#define BTRFS_NUM_BACKUP_ROOTS 4
1102struct btrfs_root_backup {
1103 __le64 tree_root;
1104 __le64 tree_root_gen;
1105
1106 __le64 chunk_root;
1107 __le64 chunk_root_gen;
1108
1109 __le64 extent_root;
1110 __le64 extent_root_gen;
1111
1112 __le64 fs_root;
1113 __le64 fs_root_gen;
1114
1115 __le64 dev_root;
1116 __le64 dev_root_gen;
1117
1118 __le64 csum_root;
1119 __le64 csum_root_gen;
1120
1121 __le64 total_bytes;
1122 __le64 bytes_used;
1123 __le64 num_devices;
1124
1125 __le64 unused_64[4];
1126
1127 u8 tree_root_level;
1128 u8 chunk_root_level;
1129 u8 extent_root_level;
1130 u8 fs_root_level;
1131 u8 dev_root_level;
1132 u8 csum_root_level;
1133
1134 u8 unused_8[10];
1135} __attribute__ ((__packed__));
1136
1137
1138
1139
1140
1141#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
1142
1143#define BTRFS_LABEL_SIZE 256
1144
1145
1146struct btrfs_super_block {
1147
1148 u8 csum[BTRFS_CSUM_SIZE];
1149
1150 u8 fsid[BTRFS_FSID_SIZE];
1151 __le64 bytenr;
1152 __le64 flags;
1153
1154
1155 __le64 magic;
1156 __le64 generation;
1157 __le64 root;
1158 __le64 chunk_root;
1159 __le64 log_root;
1160
1161
1162 __le64 log_root_transid;
1163 __le64 total_bytes;
1164 __le64 bytes_used;
1165 __le64 root_dir_objectid;
1166 __le64 num_devices;
1167 __le32 sectorsize;
1168 __le32 nodesize;
1169 __le32 __unused_leafsize;
1170 __le32 stripesize;
1171 __le32 sys_chunk_array_size;
1172 __le64 chunk_root_generation;
1173 __le64 compat_flags;
1174 __le64 compat_ro_flags;
1175 __le64 incompat_flags;
1176 __le16 csum_type;
1177 u8 root_level;
1178 u8 chunk_root_level;
1179 u8 log_root_level;
1180 struct btrfs_dev_item dev_item;
1181
1182 char label[BTRFS_LABEL_SIZE];
1183
1184 __le64 cache_generation;
1185 __le64 uuid_tree_generation;
1186
1187
1188 u8 metadata_uuid[BTRFS_FSID_SIZE];
1189
1190
1191 __le64 reserved[28];
1192 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
1193 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
1194} __attribute__ ((__packed__));
1195
1196
1197
1198
1199
1200
1201
1202
1203#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
1215
1216#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
1217#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
1218#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
1219#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
1220#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
1221
1222
1223
1224
1225
1226#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
1227
1228#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
1229#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
1230#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
1231#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
1232#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
1233#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
1234
1235
1236
1237
1238
1239
1240
1241#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
1242#define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
1243#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
1244
1245#define BTRFS_FEATURE_COMPAT_RO_SUPP \
1246 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
1247 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
1248
1249#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
1250#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
1251
1252#define BTRFS_FEATURE_INCOMPAT_SUPP \
1253 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
1254 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
1255 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
1256 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
1257 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
1258 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
1259 BTRFS_FEATURE_INCOMPAT_RAID56 | \
1260 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
1261 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
1262 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
1263 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
1264 BTRFS_FEATURE_INCOMPAT_RAID1C34)
1265
1266#define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
1267 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
1268#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
1269
1270#define BTRFS_BACKREF_REV_MAX 256
1271#define BTRFS_BACKREF_REV_SHIFT 56
1272#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
1273 BTRFS_BACKREF_REV_SHIFT)
1274
1275#define BTRFS_OLD_BACKREF_REV 0
1276#define BTRFS_MIXED_BACKREF_REV 1
1277
1278#define BTRFS_MAX_LEVEL 8
1279
1280
1281struct btrfs_header {
1282
1283 u8 csum[BTRFS_CSUM_SIZE];
1284 u8 fsid[BTRFS_FSID_SIZE];
1285 __le64 bytenr;
1286 __le64 flags;
1287
1288
1289 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1290 __le64 generation;
1291 __le64 owner;
1292 __le32 nritems;
1293 u8 level;
1294} __attribute__ ((__packed__));
1295
1296
1297
1298
1299
1300struct btrfs_item {
1301 struct btrfs_disk_key key;
1302 __le32 offset;
1303 __le32 size;
1304} __attribute__ ((__packed__));
1305
1306
1307
1308
1309
1310
1311
1312
1313struct btrfs_leaf {
1314 struct btrfs_header header;
1315 struct btrfs_item items[];
1316} __attribute__ ((__packed__));
1317
1318
1319
1320
1321
1322struct btrfs_key_ptr {
1323 struct btrfs_disk_key key;
1324 __le64 blockptr;
1325 __le64 generation;
1326} __attribute__ ((__packed__));
1327
1328struct btrfs_node {
1329 struct btrfs_header header;
1330 struct btrfs_key_ptr ptrs[];
1331} __attribute__ ((__packed__));
1332
1333#endif
1334