From: Li Zefan Date: Thu, 14 Jul 2011 03:16:47 +0000 (+0000) Subject: Btrfs: check the nodatasum flag when writing compressed files X-Git-Tag: Ubuntu-5.0.0-8.9~18000^2~14 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=e55179b3d7d41d83fd6b5f59325f4a8d8ac9700a;p=mirror_ubuntu-disco-kernel.git Btrfs: check the nodatasum flag when writing compressed files 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 Signed-off-by: Chris Mason --- diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index bfe42b03eaf9..8ec5d86f1734 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -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);