[PATCH v7 16/20] btrfs: dedup: add an inode nodedup flag
From: Qu Wenruo <hidden>
Date: 2016-02-18 05:45:33
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
From: Wang Xiaoguang <redacted> Introduce BTRFS_INODE_NODEDUP flag, then we can explicitly disable online data deduplication for specified files. Signed-off-by: Wang Xiaoguang <redacted> --- fs/btrfs/ctree.h | 1 + fs/btrfs/ioctl.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 174af5c..27ea1dd 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h@@ -2438,6 +2438,7 @@ do { \ #define BTRFS_INODE_NOATIME (1 << 9) #define BTRFS_INODE_DIRSYNC (1 << 10) #define BTRFS_INODE_COMPRESS (1 << 11) +#define BTRFS_INODE_NODEDUP (1 << 12) #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index eb37a3d..5250b8f 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c@@ -159,7 +159,8 @@ void btrfs_update_iflags(struct inode *inode) /* * Inherit flags from the parent inode. * - * Currently only the compression flags and the cow flags are inherited. + * Currently only the compression flags, the dedup flags and the cow + * flags are inherited. */ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir) {
@@ -184,6 +185,9 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir) BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM; } + if (flags & BTRFS_INODE_NODEDUP) + BTRFS_I(inode)->flags |= BTRFS_INODE_NODEDUP; + btrfs_update_iflags(inode); }
--
2.7.1