diff options
| -rw-r--r-- | fs/ext4/ext4.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 4581ff8aef19..5ade4e22dcff 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -370,6 +370,12 @@ struct ext4_io_submit { (round_up((offset), i_blocksize(inode)) >> (inode)->i_blkbits) #define EXT4_LBLK_TO_B(inode, lblk) ((loff_t)(lblk) << (inode)->i_blkbits) +/* Translate a block number to a page index */ +#define EXT4_LBLK_TO_PG(inode, lblk) (EXT4_LBLK_TO_B((inode), (lblk)) >> \ + PAGE_SHIFT) +/* Translate a page index to a block number */ +#define EXT4_PG_TO_LBLK(inode, pnum) (((loff_t)(pnum) << PAGE_SHIFT) >> \ + (inode)->i_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 */ |