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Btrfs: check the nodatasum flag when writing compressed files

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If mounting with nodatasum option, we won't csum file data for
general write or direct-io write, and this rule should also be
applied when writing compressed files.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Li Zefan 2011-07-14 03:16:47 +00:00 committed by Chris Mason
parent 77906a5075
commit e55179b3d7
1 changed files with 10 additions and 4 deletions
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14
fs/btrfs/compression.c
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@ -338,6 +338,7 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
u64 first_byte = disk_start;
struct block_device *bdev;
int ret;
int skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
WARN_ON(start & ((u64)PAGE_CACHE_SIZE - 1));
cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS);
@ -392,8 +393,11 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
BUG_ON(ret);
ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
BUG_ON(ret);
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio,
start, 1);
BUG_ON(ret);
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret);
@ -418,8 +422,10 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
BUG_ON(ret);
ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
BUG_ON(ret);
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
BUG_ON(ret);
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret);