diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index b5af1fc77c5..6d8350332b1 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -109,8 +109,14 @@ struct btrfs_ordered_sum; /* 32 bytes in various csum fields */ #define BTRFS_CSUM_SIZE 32 + +/* csum types */ +#define BTRFS_CSUM_TYPE_CRC32 0 + +static int btrfs_csum_sizes[] = { 4, 0 }; + /* four bytes for CRC32 */ -#define BTRFS_CRC32_SIZE 4 +//#define BTRFS_CRC32_SIZE 4 #define BTRFS_EMPTY_DIR_SIZE 0 #define BTRFS_FT_UNKNOWN 0 @@ -308,6 +314,7 @@ struct btrfs_super_block { __le64 compat_flags; __le64 compat_ro_flags; __le64 incompat_flags; + __le16 csum_type; u8 root_level; u8 chunk_root_level; u8 log_root_level; @@ -1483,6 +1490,7 @@ BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, last_snapshot, 64); /* struct btrfs_super_block */ + BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, @@ -1524,6 +1532,15 @@ BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, compat_flags, 64); BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, incompat_flags, 64); +BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, + csum_type, 16); + +static inline int btrfs_super_csum_size(struct btrfs_super_block *s) +{ + int t = btrfs_super_csum_type(s); + BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); + return btrfs_csum_sizes[t]; +} static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) { |