From 47059d930f0e002ff851beea87d738146804726d Mon Sep 17 00:00:00 2001 From: Wang Shilong Date: Thu, 3 Jul 2014 18:22:07 +0800 Subject: Btrfs: make defragment work with nodatacow option Btrfs defragment will utilize COW feature, which means this did not work for nodatacow option, this problem was detected by xfstests generic/018 with nodatacow mount option. Fix this problem by forcing cow for a extent with state @EXTETN_DEFRAG setting. Signed-off-by: Wang Shilong Signed-off-by: Miao Xie Signed-off-by: Chris Mason --- fs/btrfs/btrfs_inode.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/btrfs/btrfs_inode.h') diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 43527fd78825..fd879418fd42 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -120,6 +120,12 @@ struct btrfs_inode { */ u64 delalloc_bytes; + /* + * total number of bytes pending defrag, used by stat to check whether + * it needs COW. + */ + u64 defrag_bytes; + /* * the size of the file stored in the metadata on disk. data=ordered * means the in-memory i_size might be larger than the size on disk -- cgit v1.2.3