diff options
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/indirect.c | 27 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 2 |
3 files changed, 11 insertions, 20 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 4667405..25e261d 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2109,7 +2109,7 @@ extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs); extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); -extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk); +extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); extern void ext4_ind_truncate(handle_t *, struct inode *inode); extern int ext4_free_hole_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t first, ext4_lblk_t stop); diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index b8d5d35..f7742f0 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -779,27 +779,18 @@ int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock) return (blk_bits / EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb)) + 1; } -int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk) +/* + * Calculate number of indirect blocks touched by mapping @nrblocks logically + * contiguous blocks + */ +int ext4_ind_trans_blocks(struct inode *inode, int nrblocks) { - int indirects; - - /* if nrblocks are contiguous */ - if (chunk) { - /* - * With N contiguous data blocks, we need at most - * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks, - * 2 dindirect blocks, and 1 tindirect block - */ - return DIV_ROUND_UP(nrblocks, - EXT4_ADDR_PER_BLOCK(inode->i_sb)) + 4; - } /* - * if nrblocks are not contiguous, worse case, each block touch - * a indirect block, and each indirect block touch a double indirect - * block, plus a triple indirect block + * With N contiguous data blocks, we need at most + * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks, + * 2 dindirect blocks, and 1 tindirect block */ - indirects = nrblocks * 2 + 1; - return indirects; + return DIV_ROUND_UP(nrblocks, EXT4_ADDR_PER_BLOCK(inode->i_sb)) + 4; } /* diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 80c710a..23d9a44 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4653,7 +4653,7 @@ int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, static int ext4_index_trans_blocks(struct inode *inode, int nrblocks, int chunk) { if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) - return ext4_ind_trans_blocks(inode, nrblocks, chunk); + return ext4_ind_trans_blocks(inode, nrblocks); return ext4_ext_index_trans_blocks(inode, nrblocks, chunk); } |