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reactos/drivers/filesystems/btrfs/btrfs.h
Pierre Schweitzer 318da0c18c
[BTRFS] Upgrade to 1.4 
CORE-16354
2019-09-02 08:19:48 +02:00

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/* btrfs.h
* Generic btrfs header file. Thanks to whoever it was who wrote
* https://btrfs.wiki.kernel.org/index.php/On-disk_Format - you saved me a lot of time!
*
* I release this file, and this file only, into the public domain - do whatever
* you want with it. You don't have to, but I'd appreciate if you let me know if you
* use it anything cool - mark@harmstone.com. */
#pragma once
#include <stdint.h>
static const uint64_t superblock_addrs[] = { 0x10000, 0x4000000, 0x4000000000, 0x4000000000000, 0 };
#define BTRFS_MAGIC 0x4d5f53665248425f
#define MAX_LABEL_SIZE 0x100
#define SUBVOL_ROOT_INODE 0x100
#define TYPE_INODE_ITEM 0x01
#define TYPE_INODE_REF 0x0C
#define TYPE_INODE_EXTREF 0x0D
#define TYPE_XATTR_ITEM 0x18
#define TYPE_ORPHAN_INODE 0x30
#define TYPE_DIR_ITEM 0x54
#define TYPE_DIR_INDEX 0x60
#define TYPE_EXTENT_DATA 0x6C
#define TYPE_EXTENT_CSUM 0x80
#define TYPE_ROOT_ITEM 0x84
#define TYPE_ROOT_BACKREF 0x90
#define TYPE_ROOT_REF 0x9C
#define TYPE_EXTENT_ITEM 0xA8
#define TYPE_METADATA_ITEM 0xA9
#define TYPE_TREE_BLOCK_REF 0xB0
#define TYPE_EXTENT_DATA_REF 0xB2
#define TYPE_EXTENT_REF_V0 0xB4
#define TYPE_SHARED_BLOCK_REF 0xB6
#define TYPE_SHARED_DATA_REF 0xB8
#define TYPE_BLOCK_GROUP_ITEM 0xC0
#define TYPE_FREE_SPACE_INFO 0xC6
#define TYPE_FREE_SPACE_EXTENT 0xC7
#define TYPE_FREE_SPACE_BITMAP 0xC8
#define TYPE_DEV_EXTENT 0xCC
#define TYPE_DEV_ITEM 0xD8
#define TYPE_CHUNK_ITEM 0xE4
#define TYPE_TEMP_ITEM 0xF8
#define TYPE_DEV_STATS 0xF9
#define TYPE_SUBVOL_UUID 0xFB
#define TYPE_SUBVOL_REC_UUID 0xFC
#define BTRFS_ROOT_ROOT 1
#define BTRFS_ROOT_EXTENT 2
#define BTRFS_ROOT_CHUNK 3
#define BTRFS_ROOT_DEVTREE 4
#define BTRFS_ROOT_FSTREE 5
#define BTRFS_ROOT_CHECKSUM 7
#define BTRFS_ROOT_UUID 9
#define BTRFS_ROOT_FREE_SPACE 0xa
#define BTRFS_ROOT_DATA_RELOC 0xFFFFFFFFFFFFFFF7
#define BTRFS_COMPRESSION_NONE 0
#define BTRFS_COMPRESSION_ZLIB 1
#define BTRFS_COMPRESSION_LZO 2
#define BTRFS_COMPRESSION_ZSTD 3
#define BTRFS_ENCRYPTION_NONE 0
#define BTRFS_ENCODING_NONE 0
#define EXTENT_TYPE_INLINE 0
#define EXTENT_TYPE_REGULAR 1
#define EXTENT_TYPE_PREALLOC 2
#define BLOCK_FLAG_DATA 0x001
#define BLOCK_FLAG_SYSTEM 0x002
#define BLOCK_FLAG_METADATA 0x004
#define BLOCK_FLAG_RAID0 0x008
#define BLOCK_FLAG_RAID1 0x010
#define BLOCK_FLAG_DUPLICATE 0x020
#define BLOCK_FLAG_RAID10 0x040
#define BLOCK_FLAG_RAID5 0x080
#define BLOCK_FLAG_RAID6 0x100
#define FREE_SPACE_CACHE_ID 0xFFFFFFFFFFFFFFF5
#define EXTENT_CSUM_ID 0xFFFFFFFFFFFFFFF6
#define BALANCE_ITEM_ID 0xFFFFFFFFFFFFFFFC
#define BTRFS_INODE_NODATASUM 0x001
#define BTRFS_INODE_NODATACOW 0x002
#define BTRFS_INODE_READONLY 0x004
#define BTRFS_INODE_NOCOMPRESS 0x008
#define BTRFS_INODE_PREALLOC 0x010
#define BTRFS_INODE_SYNC 0x020
#define BTRFS_INODE_IMMUTABLE 0x040
#define BTRFS_INODE_APPEND 0x080
#define BTRFS_INODE_NODUMP 0x100
#define BTRFS_INODE_NOATIME 0x200
#define BTRFS_INODE_DIRSYNC 0x400
#define BTRFS_INODE_COMPRESS 0x800
#define BTRFS_SUBVOL_READONLY 0x1
#define BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE 0x1
#define BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE_VALID 0x2
#define BTRFS_INCOMPAT_FLAGS_MIXED_BACKREF 0x0001
#define BTRFS_INCOMPAT_FLAGS_DEFAULT_SUBVOL 0x0002
#define BTRFS_INCOMPAT_FLAGS_MIXED_GROUPS 0x0004
#define BTRFS_INCOMPAT_FLAGS_COMPRESS_LZO 0x0008
#define BTRFS_INCOMPAT_FLAGS_COMPRESS_ZSTD 0x0010
#define BTRFS_INCOMPAT_FLAGS_BIG_METADATA 0x0020
#define BTRFS_INCOMPAT_FLAGS_EXTENDED_IREF 0x0040
#define BTRFS_INCOMPAT_FLAGS_RAID56 0x0080
#define BTRFS_INCOMPAT_FLAGS_SKINNY_METADATA 0x0100
#define BTRFS_INCOMPAT_FLAGS_NO_HOLES 0x0200
#define BTRFS_SUPERBLOCK_FLAGS_SEEDING 0x100000000
#define BTRFS_ORPHAN_INODE_OBJID 0xFFFFFFFFFFFFFFFB
#pragma pack(push, 1)
typedef struct {
uint8_t uuid[16];
} BTRFS_UUID;
typedef struct {
uint64_t obj_id;
uint8_t obj_type;
uint64_t offset;
} KEY;
#define HEADER_FLAG_WRITTEN 0x000000000000001
#define HEADER_FLAG_SHARED_BACKREF 0x000000000000002
#define HEADER_FLAG_MIXED_BACKREF 0x100000000000000
typedef struct {
uint8_t csum[32];
BTRFS_UUID fs_uuid;
uint64_t address;
uint64_t flags;
BTRFS_UUID chunk_tree_uuid;
uint64_t generation;
uint64_t tree_id;
uint32_t num_items;
uint8_t level;
} tree_header;
typedef struct {
KEY key;
uint32_t offset;
uint32_t size;
} leaf_node;
typedef struct {
KEY key;
uint64_t address;
uint64_t generation;
} internal_node;
typedef struct {
uint64_t dev_id;
uint64_t num_bytes;
uint64_t bytes_used;
uint32_t optimal_io_align;
uint32_t optimal_io_width;
uint32_t minimal_io_size;
uint64_t type;
uint64_t generation;
uint64_t start_offset;
uint32_t dev_group;
uint8_t seek_speed;
uint8_t bandwidth;
BTRFS_UUID device_uuid;
BTRFS_UUID fs_uuid;
} DEV_ITEM;
#define SYS_CHUNK_ARRAY_SIZE 0x800
#define BTRFS_NUM_BACKUP_ROOTS 4
typedef struct {
uint64_t root_tree_addr;
uint64_t root_tree_generation;
uint64_t chunk_tree_addr;
uint64_t chunk_tree_generation;
uint64_t extent_tree_addr;
uint64_t extent_tree_generation;
uint64_t fs_tree_addr;
uint64_t fs_tree_generation;
uint64_t dev_root_addr;
uint64_t dev_root_generation;
uint64_t csum_root_addr;
uint64_t csum_root_generation;
uint64_t total_bytes;
uint64_t bytes_used;
uint64_t num_devices;
uint64_t reserved[4];
uint8_t root_level;
uint8_t chunk_root_level;
uint8_t extent_root_level;
uint8_t fs_root_level;
uint8_t dev_root_level;
uint8_t csum_root_level;
uint8_t reserved2[10];
} superblock_backup;
typedef struct {
uint8_t checksum[32];
BTRFS_UUID uuid;
uint64_t sb_phys_addr;
uint64_t flags;
uint64_t magic;
uint64_t generation;
uint64_t root_tree_addr;
uint64_t chunk_tree_addr;
uint64_t log_tree_addr;
uint64_t log_root_transid;
uint64_t total_bytes;
uint64_t bytes_used;
uint64_t root_dir_objectid;
uint64_t num_devices;
uint32_t sector_size;
uint32_t node_size;
uint32_t leaf_size;
uint32_t stripe_size;
uint32_t n;
uint64_t chunk_root_generation;
uint64_t compat_flags;
uint64_t compat_ro_flags;
uint64_t incompat_flags;
uint16_t csum_type;
uint8_t root_level;
uint8_t chunk_root_level;
uint8_t log_root_level;
DEV_ITEM dev_item;
char label[MAX_LABEL_SIZE];
uint64_t cache_generation;
uint64_t uuid_tree_generation;
uint64_t reserved[30];
uint8_t sys_chunk_array[SYS_CHUNK_ARRAY_SIZE];
superblock_backup backup[BTRFS_NUM_BACKUP_ROOTS];
uint8_t reserved2[565];
} superblock;
#define BTRFS_TYPE_UNKNOWN 0
#define BTRFS_TYPE_FILE 1
#define BTRFS_TYPE_DIRECTORY 2
#define BTRFS_TYPE_CHARDEV 3
#define BTRFS_TYPE_BLOCKDEV 4
#define BTRFS_TYPE_FIFO 5
#define BTRFS_TYPE_SOCKET 6
#define BTRFS_TYPE_SYMLINK 7
#define BTRFS_TYPE_EA 8
typedef struct {
KEY key;
uint64_t transid;
uint16_t m;
uint16_t n;
uint8_t type;
char name[1];
} DIR_ITEM;
typedef struct {
uint64_t seconds;
uint32_t nanoseconds;
} BTRFS_TIME;
typedef struct {
uint64_t generation;
uint64_t transid;
uint64_t st_size;
uint64_t st_blocks;
uint64_t block_group;
uint32_t st_nlink;
uint32_t st_uid;
uint32_t st_gid;
uint32_t st_mode;
uint64_t st_rdev;
uint64_t flags;
uint64_t sequence;
uint8_t reserved[32];
BTRFS_TIME st_atime;
BTRFS_TIME st_ctime;
BTRFS_TIME st_mtime;
BTRFS_TIME otime;
} INODE_ITEM;
typedef struct {
INODE_ITEM inode;
uint64_t generation;
uint64_t objid;
uint64_t block_number;
uint64_t byte_limit;
uint64_t bytes_used;
uint64_t last_snapshot_generation;
uint64_t flags;
uint32_t num_references;
KEY drop_progress;
uint8_t drop_level;
uint8_t root_level;
uint64_t generation2;
BTRFS_UUID uuid;
BTRFS_UUID parent_uuid;
BTRFS_UUID received_uuid;
uint64_t ctransid;
uint64_t otransid;
uint64_t stransid;
uint64_t rtransid;
BTRFS_TIME ctime;
BTRFS_TIME otime;
BTRFS_TIME stime;
BTRFS_TIME rtime;
uint64_t reserved[8];
} ROOT_ITEM;
typedef struct {
uint64_t size;
uint64_t root_id;
uint64_t stripe_length;
uint64_t type;
uint32_t opt_io_alignment;
uint32_t opt_io_width;
uint32_t sector_size;
uint16_t num_stripes;
uint16_t sub_stripes;
} CHUNK_ITEM;
typedef struct {
uint64_t dev_id;
uint64_t offset;
BTRFS_UUID dev_uuid;
} CHUNK_ITEM_STRIPE;
typedef struct {
uint64_t generation;
uint64_t decoded_size;
uint8_t compression;
uint8_t encryption;
uint16_t encoding;
uint8_t type;
uint8_t data[1];
} EXTENT_DATA;
typedef struct {
uint64_t address;
uint64_t size;
uint64_t offset;
uint64_t num_bytes;
} EXTENT_DATA2;
typedef struct {
uint64_t index;
uint16_t n;
char name[1];
} INODE_REF;
typedef struct {
uint64_t dir;
uint64_t index;
uint16_t n;
char name[1];
} INODE_EXTREF;
#define EXTENT_ITEM_DATA 0x001
#define EXTENT_ITEM_TREE_BLOCK 0x002
#define EXTENT_ITEM_SHARED_BACKREFS 0x100
typedef struct {
uint64_t refcount;
uint64_t generation;
uint64_t flags;
} EXTENT_ITEM;
typedef struct {
KEY firstitem;
uint8_t level;
} EXTENT_ITEM2;
typedef struct {
uint32_t refcount;
} EXTENT_ITEM_V0;
typedef struct {
EXTENT_ITEM extent_item;
KEY firstitem;
uint8_t level;
} EXTENT_ITEM_TREE;
typedef struct {
uint64_t offset;
} TREE_BLOCK_REF;
typedef struct {
uint64_t root;
uint64_t objid;
uint64_t offset;
uint32_t count;
} EXTENT_DATA_REF;
typedef struct {
uint64_t used;
uint64_t chunk_tree;
uint64_t flags;
} BLOCK_GROUP_ITEM;
typedef struct {
uint64_t root;
uint64_t gen;
uint64_t objid;
uint32_t count;
} EXTENT_REF_V0;
typedef struct {
uint64_t offset;
} SHARED_BLOCK_REF;
typedef struct {
uint64_t offset;
uint32_t count;
} SHARED_DATA_REF;
#define FREE_SPACE_EXTENT 1
#define FREE_SPACE_BITMAP 2
typedef struct {
uint64_t offset;
uint64_t size;
uint8_t type;
} FREE_SPACE_ENTRY;
typedef struct {
KEY key;
uint64_t generation;
uint64_t num_entries;
uint64_t num_bitmaps;
} FREE_SPACE_ITEM;
typedef struct {
uint64_t dir;
uint64_t index;
uint16_t n;
char name[1];
} ROOT_REF;
typedef struct {
uint64_t chunktree;
uint64_t objid;
uint64_t address;
uint64_t length;
BTRFS_UUID chunktree_uuid;
} DEV_EXTENT;
#define BALANCE_FLAGS_DATA 0x1
#define BALANCE_FLAGS_SYSTEM 0x2
#define BALANCE_FLAGS_METADATA 0x4
#define BALANCE_ARGS_FLAGS_PROFILES 0x001
#define BALANCE_ARGS_FLAGS_USAGE 0x002
#define BALANCE_ARGS_FLAGS_DEVID 0x004
#define BALANCE_ARGS_FLAGS_DRANGE 0x008
#define BALANCE_ARGS_FLAGS_VRANGE 0x010
#define BALANCE_ARGS_FLAGS_LIMIT 0x020
#define BALANCE_ARGS_FLAGS_LIMIT_RANGE 0x040
#define BALANCE_ARGS_FLAGS_STRIPES_RANGE 0x080
#define BALANCE_ARGS_FLAGS_CONVERT 0x100
#define BALANCE_ARGS_FLAGS_SOFT 0x200
#define BALANCE_ARGS_FLAGS_USAGE_RANGE 0x400
typedef struct {
uint64_t profiles;
union {
uint64_t usage;
struct {
uint32_t usage_start;
uint32_t usage_end;
};
};
uint64_t devid;
uint64_t drange_start;
uint64_t drange_end;
uint64_t vrange_start;
uint64_t vrange_end;
uint64_t convert;
uint64_t flags;
union {
uint64_t limit;
struct {
uint32_t limit_start;
uint32_t limit_end;
};
};
uint32_t stripes_start;
uint32_t stripes_end;
uint8_t reserved[48];
} BALANCE_ARGS;
typedef struct {
uint64_t flags;
BALANCE_ARGS data;
BALANCE_ARGS metadata;
BALANCE_ARGS system;
uint8_t reserved[32];
} BALANCE_ITEM;
#define BTRFS_FREE_SPACE_USING_BITMAPS 1
typedef struct {
uint32_t count;
uint32_t flags;
} FREE_SPACE_INFO;
#define BTRFS_DEV_STAT_WRITE_ERRORS 0
#define BTRFS_DEV_STAT_READ_ERRORS 1
#define BTRFS_DEV_STAT_FLUSH_ERRORS 2
#define BTRFS_DEV_STAT_CORRUPTION_ERRORS 3
#define BTRFS_DEV_STAT_GENERATION_ERRORS 4
#define BTRFS_SEND_CMD_SUBVOL 1
#define BTRFS_SEND_CMD_SNAPSHOT 2
#define BTRFS_SEND_CMD_MKFILE 3
#define BTRFS_SEND_CMD_MKDIR 4
#define BTRFS_SEND_CMD_MKNOD 5
#define BTRFS_SEND_CMD_MKFIFO 6
#define BTRFS_SEND_CMD_MKSOCK 7
#define BTRFS_SEND_CMD_SYMLINK 8
#define BTRFS_SEND_CMD_RENAME 9
#define BTRFS_SEND_CMD_LINK 10
#define BTRFS_SEND_CMD_UNLINK 11
#define BTRFS_SEND_CMD_RMDIR 12
#define BTRFS_SEND_CMD_SET_XATTR 13
#define BTRFS_SEND_CMD_REMOVE_XATTR 14
#define BTRFS_SEND_CMD_WRITE 15
#define BTRFS_SEND_CMD_CLONE 16
#define BTRFS_SEND_CMD_TRUNCATE 17
#define BTRFS_SEND_CMD_CHMOD 18
#define BTRFS_SEND_CMD_CHOWN 19
#define BTRFS_SEND_CMD_UTIMES 20
#define BTRFS_SEND_CMD_END 21
#define BTRFS_SEND_CMD_UPDATE_EXTENT 22
#define BTRFS_SEND_TLV_UUID 1
#define BTRFS_SEND_TLV_TRANSID 2
#define BTRFS_SEND_TLV_INODE 3
#define BTRFS_SEND_TLV_SIZE 4
#define BTRFS_SEND_TLV_MODE 5
#define BTRFS_SEND_TLV_UID 6
#define BTRFS_SEND_TLV_GID 7
#define BTRFS_SEND_TLV_RDEV 8
#define BTRFS_SEND_TLV_CTIME 9
#define BTRFS_SEND_TLV_MTIME 10
#define BTRFS_SEND_TLV_ATIME 11
#define BTRFS_SEND_TLV_OTIME 12
#define BTRFS_SEND_TLV_XATTR_NAME 13
#define BTRFS_SEND_TLV_XATTR_DATA 14
#define BTRFS_SEND_TLV_PATH 15
#define BTRFS_SEND_TLV_PATH_TO 16
#define BTRFS_SEND_TLV_PATH_LINK 17
#define BTRFS_SEND_TLV_OFFSET 18
#define BTRFS_SEND_TLV_DATA 19
#define BTRFS_SEND_TLV_CLONE_UUID 20
#define BTRFS_SEND_TLV_CLONE_CTRANSID 21
#define BTRFS_SEND_TLV_CLONE_PATH 22
#define BTRFS_SEND_TLV_CLONE_OFFSET 23
#define BTRFS_SEND_TLV_CLONE_LENGTH 24
#define BTRFS_SEND_MAGIC "btrfs-stream"
typedef struct {
uint8_t magic[13];
uint32_t version;
} btrfs_send_header;
typedef struct {
uint32_t length;
uint16_t cmd;
uint32_t csum;
} btrfs_send_command;
typedef struct {
uint16_t type;
uint16_t length;
} btrfs_send_tlv;
#pragma pack(pop)
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