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| author | Theodore Ts'o <tytso@mit.edu> | 2011-09-09 18:44:51 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-09-09 18:44:51 -0400 |
| commit | d5b8f31007a93777cfb0603b665858fb7aebebfc (patch) | |
| tree | 19d9dfed9314132302b8e3036a2ada26f9809036 /fs/ext4/ext4.h | |
| parent | fd034a84e1ea5c8c8d159cd2089c32e792c269b0 (diff) | |
ext4: bigalloc changes to block bitmap initialization functions
Add bigalloc support to ext4_init_block_bitmap() and
ext4_free_blocks_after_init().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index b0b7b67e439d..803cfa42e1e8 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -261,6 +261,14 @@ struct ext4_io_submit { #endif #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) +/* Translate a block number to a cluster number */ +#define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) +/* Translate a cluster number to a block number */ +#define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) +/* Translate # of blks to # of clusters */ +#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ + (sbi)->s_cluster_bits) + /* * Structure of a blocks group descriptor */ @@ -1770,6 +1778,11 @@ extern void ext4_init_block_bitmap(struct super_block *sb, extern unsigned ext4_free_blocks_after_init(struct super_block *sb, ext4_group_t block_group, struct ext4_group_desc *gdp); +extern unsigned ext4_num_base_meta_clusters(struct super_block *sb, + ext4_group_t block_group); +extern unsigned ext4_num_overhead_clusters(struct super_block *sb, + ext4_group_t block_group, + struct ext4_group_desc *gdp); ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); /* dir.c */ |