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Diffstat (limited to 'fs/btrfs/btrfs_tree.h')
| -rw-r--r-- | fs/btrfs/btrfs_tree.h | 766 |
1 files changed, 0 insertions, 766 deletions
diff --git a/fs/btrfs/btrfs_tree.h b/fs/btrfs/btrfs_tree.h deleted file mode 100644 index aa0f3d6c86d..00000000000 --- a/fs/btrfs/btrfs_tree.h +++ /dev/null @@ -1,766 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * From linux/include/uapi/linux/btrfs_tree.h - */ - -#ifndef __BTRFS_BTRFS_TREE_H__ -#define __BTRFS_BTRFS_TREE_H__ - -#include <common.h> - -#define BTRFS_VOL_NAME_MAX 255 -#define BTRFS_NAME_MAX 255 -#define BTRFS_LABEL_SIZE 256 -#define BTRFS_FSID_SIZE 16 -#define BTRFS_UUID_SIZE 16 - -/* - * This header contains the structure definitions and constants used - * by file system objects that can be retrieved using - * the BTRFS_IOC_SEARCH_TREE ioctl. That means basically anything that - * is needed to describe a leaf node's key or item contents. - */ - -/* holds pointers to all of the tree roots */ -#define BTRFS_ROOT_TREE_OBJECTID 1ULL - -/* stores information about which extents are in use, and reference counts */ -#define BTRFS_EXTENT_TREE_OBJECTID 2ULL - -/* - * chunk tree stores translations from logical -> physical block numbering - * the super block points to the chunk tree - */ -#define BTRFS_CHUNK_TREE_OBJECTID 3ULL - -/* - * stores information about which areas of a given device are in use. - * one per device. The tree of tree roots points to the device tree - */ -#define BTRFS_DEV_TREE_OBJECTID 4ULL - -/* one per subvolume, storing files and directories */ -#define BTRFS_FS_TREE_OBJECTID 5ULL - -/* directory objectid inside the root tree */ -#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL - -/* holds checksums of all the data extents */ -#define BTRFS_CSUM_TREE_OBJECTID 7ULL - -/* holds quota configuration and tracking */ -#define BTRFS_QUOTA_TREE_OBJECTID 8ULL - -/* for storing items that use the BTRFS_UUID_KEY* types */ -#define BTRFS_UUID_TREE_OBJECTID 9ULL - -/* tracks free space in block groups. */ -#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL - -/* device stats in the device tree */ -#define BTRFS_DEV_STATS_OBJECTID 0ULL - -/* for storing balance parameters in the root tree */ -#define BTRFS_BALANCE_OBJECTID -4ULL - -/* orhpan objectid for tracking unlinked/truncated files */ -#define BTRFS_ORPHAN_OBJECTID -5ULL - -/* does write ahead logging to speed up fsyncs */ -#define BTRFS_TREE_LOG_OBJECTID -6ULL -#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL - -/* for space balancing */ -#define BTRFS_TREE_RELOC_OBJECTID -8ULL -#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL - -/* - * extent checksums all have this objectid - * this allows them to share the logging tree - * for fsyncs - */ -#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL - -/* For storing free space cache */ -#define BTRFS_FREE_SPACE_OBJECTID -11ULL - -/* - * The inode number assigned to the special inode for storing - * free ino cache - */ -#define BTRFS_FREE_INO_OBJECTID -12ULL - -/* dummy objectid represents multiple objectids */ -#define BTRFS_MULTIPLE_OBJECTIDS -255ULL - -/* - * All files have objectids in this range. - */ -#define BTRFS_FIRST_FREE_OBJECTID 256ULL -#define BTRFS_LAST_FREE_OBJECTID -256ULL -#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL - - -/* - * the device items go into the chunk tree. The key is in the form - * [ 1 BTRFS_DEV_ITEM_KEY device_id ] - */ -#define BTRFS_DEV_ITEMS_OBJECTID 1ULL - -#define BTRFS_BTREE_INODE_OBJECTID 1 - -#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 - -#define BTRFS_DEV_REPLACE_DEVID 0ULL - -/* - * inode items have the data typically returned from stat and store other - * info about object characteristics. There is one for every file and dir in - * the FS - */ -#define BTRFS_INODE_ITEM_KEY 1 -#define BTRFS_INODE_REF_KEY 12 -#define BTRFS_INODE_EXTREF_KEY 13 -#define BTRFS_XATTR_ITEM_KEY 24 -#define BTRFS_ORPHAN_ITEM_KEY 48 -/* reserve 2-15 close to the inode for later flexibility */ - -/* - * dir items are the name -> inode pointers in a directory. There is one - * for every name in a directory. - */ -#define BTRFS_DIR_LOG_ITEM_KEY 60 -#define BTRFS_DIR_LOG_INDEX_KEY 72 -#define BTRFS_DIR_ITEM_KEY 84 -#define BTRFS_DIR_INDEX_KEY 96 -/* - * extent data is for file data - */ -#define BTRFS_EXTENT_DATA_KEY 108 - -/* - * extent csums are stored in a separate tree and hold csums for - * an entire extent on disk. - */ -#define BTRFS_EXTENT_CSUM_KEY 128 - -/* - * root items point to tree roots. They are typically in the root - * tree used by the super block to find all the other trees - */ -#define BTRFS_ROOT_ITEM_KEY 132 - -/* - * root backrefs tie subvols and snapshots to the directory entries that - * reference them - */ -#define BTRFS_ROOT_BACKREF_KEY 144 - -/* - * root refs make a fast index for listing all of the snapshots and - * subvolumes referenced by a given root. They point directly to the - * directory item in the root that references the subvol - */ -#define BTRFS_ROOT_REF_KEY 156 - -/* - * extent items are in the extent map tree. These record which blocks - * are used, and how many references there are to each block - */ -#define BTRFS_EXTENT_ITEM_KEY 168 - -/* - * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know - * the length, so we save the level in key->offset instead of the length. - */ -#define BTRFS_METADATA_ITEM_KEY 169 - -#define BTRFS_TREE_BLOCK_REF_KEY 176 - -#define BTRFS_EXTENT_DATA_REF_KEY 178 - -#define BTRFS_EXTENT_REF_V0_KEY 180 - -#define BTRFS_SHARED_BLOCK_REF_KEY 182 - -#define BTRFS_SHARED_DATA_REF_KEY 184 - -/* - * block groups give us hints into the extent allocation trees. Which - * blocks are free etc etc - */ -#define BTRFS_BLOCK_GROUP_ITEM_KEY 192 - -/* - * Every block group is represented in the free space tree by a free space info - * item, which stores some accounting information. It is keyed on - * (block_group_start, FREE_SPACE_INFO, block_group_length). - */ -#define BTRFS_FREE_SPACE_INFO_KEY 198 - -/* - * A free space extent tracks an extent of space that is free in a block group. - * It is keyed on (start, FREE_SPACE_EXTENT, length). - */ -#define BTRFS_FREE_SPACE_EXTENT_KEY 199 - -/* - * When a block group becomes very fragmented, we convert it to use bitmaps - * instead of extents. A free space bitmap is keyed on - * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with - * (length / sectorsize) bits. - */ -#define BTRFS_FREE_SPACE_BITMAP_KEY 200 - -#define BTRFS_DEV_EXTENT_KEY 204 -#define BTRFS_DEV_ITEM_KEY 216 -#define BTRFS_CHUNK_ITEM_KEY 228 - -/* - * Records the overall state of the qgroups. - * There's only one instance of this key present, - * (0, BTRFS_QGROUP_STATUS_KEY, 0) - */ -#define BTRFS_QGROUP_STATUS_KEY 240 -/* - * Records the currently used space of the qgroup. - * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid). - */ -#define BTRFS_QGROUP_INFO_KEY 242 -/* - * Contains the user configured limits for the qgroup. - * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid). - */ -#define BTRFS_QGROUP_LIMIT_KEY 244 -/* - * Records the child-parent relationship of qgroups. For - * each relation, 2 keys are present: - * (childid, BTRFS_QGROUP_RELATION_KEY, parentid) - * (parentid, BTRFS_QGROUP_RELATION_KEY, childid) - */ -#define BTRFS_QGROUP_RELATION_KEY 246 - -/* - * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY. - */ -#define BTRFS_BALANCE_ITEM_KEY 248 - -/* - * The key type for tree items that are stored persistently, but do not need to - * exist for extended period of time. The items can exist in any tree. - * - * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data] - * - * Existing items: - * - * - balance status item - * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0) - */ -#define BTRFS_TEMPORARY_ITEM_KEY 248 - -/* - * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY - */ -#define BTRFS_DEV_STATS_KEY 249 - -/* - * The key type for tree items that are stored persistently and usually exist - * for a long period, eg. filesystem lifetime. The item kinds can be status - * information, stats or preference values. The item can exist in any tree. - * - * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data] - * - * Existing items: - * - * - device statistics, store IO stats in the device tree, one key for all - * stats - * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0) - */ -#define BTRFS_PERSISTENT_ITEM_KEY 249 - -/* - * Persistantly stores the device replace state in the device tree. - * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). - */ -#define BTRFS_DEV_REPLACE_KEY 250 - -/* - * Stores items that allow to quickly map UUIDs to something else. - * These items are part of the filesystem UUID tree. - * The key is built like this: - * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). - */ -#if BTRFS_UUID_SIZE != 16 -#error "UUID items require BTRFS_UUID_SIZE == 16!" -#endif -#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ -#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to - * received subvols */ - -/* - * string items are for debugging. They just store a short string of - * data in the FS - */ -#define BTRFS_STRING_ITEM_KEY 253 - - - -/* 32 bytes in various csum fields */ -#define BTRFS_CSUM_SIZE 32 - -/* csum types */ -#define BTRFS_CSUM_TYPE_CRC32 0 - -/* - * flags definitions for directory entry item type - * - * Used by: - * struct btrfs_dir_item.type - */ -#define BTRFS_FT_UNKNOWN 0 -#define BTRFS_FT_REG_FILE 1 -#define BTRFS_FT_DIR 2 -#define BTRFS_FT_CHRDEV 3 -#define BTRFS_FT_BLKDEV 4 -#define BTRFS_FT_FIFO 5 -#define BTRFS_FT_SOCK 6 -#define BTRFS_FT_SYMLINK 7 -#define BTRFS_FT_XATTR 8 -#define BTRFS_FT_MAX 9 - -/* - * The key defines the order in the tree, and so it also defines (optimal) - * block layout. - * - * objectid corresponds to the inode number. - * - * type tells us things about the object, and is a kind of stream selector. - * so for a given inode, keys with type of 1 might refer to the inode data, - * type of 2 may point to file data in the btree and type == 3 may point to - * extents. - * - * offset is the starting byte offset for this key in the stream. - */ - -struct btrfs_key { - __u64 objectid; - __u8 type; - __u64 offset; -} __attribute__ ((__packed__)); - -struct btrfs_dev_item { - /* the internal btrfs device id */ - __u64 devid; - - /* size of the device */ - __u64 total_bytes; - - /* bytes used */ - __u64 bytes_used; - - /* optimal io alignment for this device */ - __u32 io_align; - - /* optimal io width for this device */ - __u32 io_width; - - /* minimal io size for this device */ - __u32 sector_size; - - /* type and info about this device */ - __u64 type; - - /* expected generation for this device */ - __u64 generation; - - /* - * starting byte of this partition on the device, - * to allow for stripe alignment in the future - */ - __u64 start_offset; - - /* grouping information for allocation decisions */ - __u32 dev_group; - - /* seek speed 0-100 where 100 is fastest */ - __u8 seek_speed; - - /* bandwidth 0-100 where 100 is fastest */ - __u8 bandwidth; - - /* btrfs generated uuid for this device */ - __u8 uuid[BTRFS_UUID_SIZE]; - - /* uuid of FS who owns this device */ - __u8 fsid[BTRFS_UUID_SIZE]; -} __attribute__ ((__packed__)); - -struct btrfs_stripe { - __u64 devid; - __u64 offset; - __u8 dev_uuid[BTRFS_UUID_SIZE]; -} __attribute__ ((__packed__)); - -struct btrfs_chunk { - /* size of this chunk in bytes */ - __u64 length; - - /* objectid of the root referencing this chunk */ - __u64 owner; - - __u64 stripe_len; - __u64 type; - - /* optimal io alignment for this chunk */ - __u32 io_align; - - /* optimal io width for this chunk */ - __u32 io_width; - - /* minimal io size for this chunk */ - __u32 sector_size; - - /* 2^16 stripes is quite a lot, a second limit is the size of a single - * item in the btree - */ - __u16 num_stripes; - - /* sub stripes only matter for raid10 */ - __u16 sub_stripes; - struct btrfs_stripe stripe; - /* additional stripes go here */ -} __attribute__ ((__packed__)); - -#define BTRFS_FREE_SPACE_EXTENT 1 -#define BTRFS_FREE_SPACE_BITMAP 2 - -struct btrfs_free_space_entry { - __u64 offset; - __u64 bytes; - __u8 type; -} __attribute__ ((__packed__)); - -struct btrfs_free_space_header { - struct btrfs_key location; - __u64 generation; - __u64 num_entries; - __u64 num_bitmaps; -} __attribute__ ((__packed__)); - -#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) -#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) - -/* Super block flags */ -/* Errors detected */ -#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) - -#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) -#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) - - -/* - * items in the extent btree are used to record the objectid of the - * owner of the block and the number of references - */ - -struct btrfs_extent_item { - __u64 refs; - __u64 generation; - __u64 flags; -} __attribute__ ((__packed__)); - - -#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) -#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) - -/* following flags only apply to tree blocks */ - -/* use full backrefs for extent pointers in the block */ -#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) - -/* - * this flag is only used internally by scrub and may be changed at any time - * it is only declared here to avoid collisions - */ -#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) - -struct btrfs_tree_block_info { - struct btrfs_key key; - __u8 level; -} __attribute__ ((__packed__)); - -struct btrfs_extent_data_ref { - __u64 root; - __u64 objectid; - __u64 offset; - __u32 count; -} __attribute__ ((__packed__)); - -struct btrfs_shared_data_ref { - __u32 count; -} __attribute__ ((__packed__)); - -struct btrfs_extent_inline_ref { - __u8 type; - __u64 offset; -} __attribute__ ((__packed__)); - -/* dev extents record free space on individual devices. The owner - * field points back to the chunk allocation mapping tree that allocated - * the extent. The chunk tree uuid field is a way to double check the owner - */ -struct btrfs_dev_extent { - __u64 chunk_tree; - __u64 chunk_objectid; - __u64 chunk_offset; - __u64 length; - __u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; -} __attribute__ ((__packed__)); - -struct btrfs_inode_ref { - __u64 index; - __u16 name_len; - /* name goes here */ -} __attribute__ ((__packed__)); - -struct btrfs_inode_extref { - __u64 parent_objectid; - __u64 index; - __u16 name_len; - __u8 name[0]; - /* name goes here */ -} __attribute__ ((__packed__)); - -struct btrfs_timespec { - __u64 sec; - __u32 nsec; -} __attribute__ ((__packed__)); - -struct btrfs_inode_item { - /* nfs style generation number */ - __u64 generation; - /* transid that last touched this inode */ - __u64 transid; - __u64 size; - __u64 nbytes; - __u64 block_group; - __u32 nlink; - __u32 uid; - __u32 gid; - __u32 mode; - __u64 rdev; - __u64 flags; - - /* modification sequence number for NFS */ - __u64 sequence; - - /* - * a little future expansion, for more than this we can - * just grow the inode item and version it - */ - __u64 reserved[4]; - struct btrfs_timespec atime; - struct btrfs_timespec ctime; - struct btrfs_timespec mtime; - struct btrfs_timespec otime; -} __attribute__ ((__packed__)); - -struct btrfs_dir_log_item { - __u64 end; -} __attribute__ ((__packed__)); - -struct btrfs_dir_item { - struct btrfs_key location; - __u64 transid; - __u16 data_len; - __u16 name_len; - __u8 type; -} __attribute__ ((__packed__)); - -#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) - -/* - * Internal in-memory flag that a subvolume has been marked for deletion but - * still visible as a directory - */ -#define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48) - -struct btrfs_root_item { - struct btrfs_inode_item inode; - __u64 generation; - __u64 root_dirid; - __u64 bytenr; - __u64 byte_limit; - __u64 bytes_used; - __u64 last_snapshot; - __u64 flags; - __u32 refs; - struct btrfs_key drop_progress; - __u8 drop_level; - __u8 level; - - /* - * The following fields appear after subvol_uuids+subvol_times - * were introduced. - */ - - /* - * This generation number is used to test if the new fields are valid - * and up to date while reading the root item. Every time the root item - * is written out, the "generation" field is copied into this field. If - * anyone ever mounted the fs with an older kernel, we will have - * mismatching generation values here and thus must invalidate the - * new fields. See btrfs_update_root and btrfs_find_last_root for - * details. - * the offset of generation_v2 is also used as the start for the memset - * when invalidating the fields. - */ - __u64 generation_v2; - __u8 uuid[BTRFS_UUID_SIZE]; - __u8 parent_uuid[BTRFS_UUID_SIZE]; - __u8 received_uuid[BTRFS_UUID_SIZE]; - __u64 ctransid; /* updated when an inode changes */ - __u64 otransid; /* trans when created */ - __u64 stransid; /* trans when sent. non-zero for received subvol */ - __u64 rtransid; /* trans when received. non-zero for received subvol */ - struct btrfs_timespec ctime; - struct btrfs_timespec otime; - struct btrfs_timespec stime; - struct btrfs_timespec rtime; - __u64 reserved[8]; /* for future */ -} __attribute__ ((__packed__)); - -/* - * this is used for both forward and backward root refs - */ -struct btrfs_root_ref { - __u64 dirid; - __u64 sequence; - __u16 name_len; -} __attribute__ ((__packed__)); - -#define BTRFS_FILE_EXTENT_INLINE 0 -#define BTRFS_FILE_EXTENT_REG 1 -#define BTRFS_FILE_EXTENT_PREALLOC 2 - -enum btrfs_compression_type { - BTRFS_COMPRESS_NONE = 0, - BTRFS_COMPRESS_ZLIB = 1, - BTRFS_COMPRESS_LZO = 2, - BTRFS_COMPRESS_ZSTD = 3, - BTRFS_COMPRESS_TYPES = 3, - BTRFS_COMPRESS_LAST = 4, -}; - -struct btrfs_file_extent_item { - /* - * transaction id that created this extent - */ - __u64 generation; - /* - * max number of bytes to hold this extent in ram - * when we split a compressed extent we can't know how big - * each of the resulting pieces will be. So, this is - * an upper limit on the size of the extent in ram instead of - * an exact limit. - */ - __u64 ram_bytes; - - /* - * 32 bits for the various ways we might encode the data, - * including compression and encryption. If any of these - * are set to something a given disk format doesn't understand - * it is treated like an incompat flag for reading and writing, - * but not for stat. - */ - __u8 compression; - __u8 encryption; - __u16 other_encoding; /* spare for later use */ - - /* are we inline data or a real extent? */ - __u8 type; - - /* - * disk space consumed by the extent, checksum blocks are included - * in these numbers - * - * At this offset in the structure, the inline extent data start. - */ - __u64 disk_bytenr; - __u64 disk_num_bytes; - /* - * the logical offset in file blocks (no csums) - * this extent record is for. This allows a file extent to point - * into the middle of an existing extent on disk, sharing it - * between two snapshots (useful if some bytes in the middle of the - * extent have changed - */ - __u64 offset; - /* - * the logical number of file blocks (no csums included). This - * always reflects the size uncompressed and without encoding. - */ - __u64 num_bytes; - -} __attribute__ ((__packed__)); - -struct btrfs_csum_item { - __u8 csum; -} __attribute__ ((__packed__)); - -/* different types of block groups (and chunks) */ -#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) -#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) -#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) -#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) -#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) -#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) -#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) -#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) -#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) -#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \ - BTRFS_SPACE_INFO_GLOBAL_RSV) - -enum btrfs_raid_types { - BTRFS_RAID_RAID10, - BTRFS_RAID_RAID1, - BTRFS_RAID_DUP, - BTRFS_RAID_RAID0, - BTRFS_RAID_SINGLE, - BTRFS_RAID_RAID5, - BTRFS_RAID_RAID6, - BTRFS_NR_RAID_TYPES -}; - -#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ - BTRFS_BLOCK_GROUP_SYSTEM | \ - BTRFS_BLOCK_GROUP_METADATA) - -#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ - BTRFS_BLOCK_GROUP_RAID1 | \ - BTRFS_BLOCK_GROUP_RAID5 | \ - BTRFS_BLOCK_GROUP_RAID6 | \ - BTRFS_BLOCK_GROUP_DUP | \ - BTRFS_BLOCK_GROUP_RAID10) -#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \ - BTRFS_BLOCK_GROUP_RAID6) - -/* - * We need a bit for restriper to be able to tell when chunks of type - * SINGLE are available. This "extended" profile format is used in - * fs_info->avail_*_alloc_bits (in-memory) and balance item fields - * (on-disk). The corresponding on-disk bit in chunk.type is reserved - * to avoid remappings between two formats in future. - */ -#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) - -/* - * A fake block group type that is used to communicate global block reserve - * size to userspace via the SPACE_INFO ioctl. - */ -#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) - -#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ - BTRFS_AVAIL_ALLOC_BIT_SINGLE) - -#endif /* __BTRFS_BTRFS_TREE_H__ */ |