From: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
Introduce BTRFS_INODE_NODEDUP flag, then we can explicitly disable
online data deduplication for specified files.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
---
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 a68e23d..ddc6ff2 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2400,6 +2400,7 @@ 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 c18be18..32c3aa2 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);
}
--
2.7.0
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