diff options
| author | Josef Bacik <jbacik@redhat.com> | 2008-12-02 09:58:23 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-12-02 09:58:23 -0500 |
| commit | 1148e55804c814094dd86fe9651eface01b745b4 (patch) | |
| tree | bd05668325535d77f0fded51fbed459026e7f73a /ctree.h | |
| parent | 76b8244a7a8214819eb7cfb7b8ffc3bf26b70642 (diff) | |
btrfs-progs: support for different csum algorithims
This is the btrfs-progs version of the patch to add the ability to have
different csum algorithims. Note I didn't change the image maker since it
seemed a bit more complicated than just changing some stuff around so I will let
Yan take care of that.
Everything else was converted and for now a mkfs just
sets the type to be BTRFS_CSUM_TYPE_CRC32.
Signed-off-by: Josef Bacik <jbacik@redhat.com>
Diffstat (limited to 'ctree.h')
| -rw-r--r-- | ctree.h | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -92,6 +92,16 @@ struct btrfs_trans_handle; /* 32 bytes in various csum fields */ #define BTRFS_CSUM_SIZE 32 + +/* csum types */ +#define BTRFS_CSUM_TYPE_CRC32 0 + + +/* 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_EMPTY_DIR_SIZE 0 @@ -292,6 +302,7 @@ 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; @@ -1312,6 +1323,7 @@ BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, /* 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, @@ -1353,6 +1365,15 @@ 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) { |