From: Wang Xiaoguang <wangxg.f...@cn.fujitsu.com>
Introduce BTRFS_INODE_NODEDUP flag, then we can explicitly disable
online data dedupelication for specified files.
Signed-off-by: Wang Xiaoguang <wangxg.f...@cn.fujitsu.com>
---
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 bed9273..b19c1f1 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2428,6 +2428,7 @@ do {
\
#define BTRFS_INODE_NOATIME (1 << 9)
#define BTRFS_INODE_DIRSYNC (1 << 10)
#define BTRFS_INODE_COMPRESS (1 << 11)
+#define BTRFS_INODE_NODEDUPE (1 << 12)
#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 49bca5f..3c226b0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -161,7 +161,8 @@ 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, dedupe flags and the cow flags
+ * are inherited.
*/
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
{
@@ -186,6 +187,9 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode
*dir)
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
}
+ if (flags & BTRFS_INODE_NODEDUPE)
+ BTRFS_I(inode)->flags |= BTRFS_INODE_NODEDUPE;
+
btrfs_update_iflags(inode);
}
--
2.7.3
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