#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
/*
- * Fake signature for an unfinalized filesystem, structures might be partially
- * created or missing.
+ * Fake signature for an unfinalized filesystem, which only has barebone tree
+ * structures (normally 6 near empty trees, on SINGLE meta/sys temporary chunks)
+ *
+ * ascii !BHRfS_M, no null
*/
-#define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
+#define BTRFS_MAGIC_TEMPORARY 0x4D5F536652484221ULL
#define BTRFS_MAX_MIRRORS 3
/* csum types */
#define BTRFS_CSUM_TYPE_CRC32 0
+/* four bytes for CRC32 */
static int btrfs_csum_sizes[] = { 4 };
-/* four bytes for CRC32 */
-#define BTRFS_CRC32_SIZE 4
#define BTRFS_EMPTY_DIR_SIZE 0
#define BTRFS_FT_UNKNOWN 0
#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
-#define BTRFS_NR_RAID_TYPES 7
+
+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 | \
return btrfs_item_end(eb, btrfs_item_nr(nr));
}
-static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
+static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
{
return btrfs_item_offset(eb, btrfs_item_nr(nr));
}
u32 blocksize, u64 root_objectid,
struct btrfs_disk_key *key, int level,
u64 hint, u64 empty_size);
-int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- u64 num_bytes, u64 parent,
- u64 root_objectid, u64 ref_generation,
- u64 owner, u64 empty_size, u64 hint_byte,
- u64 search_end, struct btrfs_key *ins, int data);
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 bytenr,
u64 offset, int metadata, u64 *refs, u64 *flags);
}
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
-int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
+int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
+ struct extent_buffer *leaf);
void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_disk_key *key, int level);
int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,