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authorDarrick J. Wong <darrick.wong@oracle.com>2016-10-03 19:11:41 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2016-10-06 02:26:26 +0300
commitcc714660bb8b14dd897cd805bbcd8b76a7606289 (patch)
tree7c55c2dba94c899cc23f07e2333c99d2b9dc9313 /fs/xfs/xfs_reflink.h
parent9fe26045e98f8787999f6aa45aec35d16565c1bd (diff)
downloadlinux-cc714660bb8b14dd897cd805bbcd8b76a7606289.tar.xz
xfs: add dedupe range vfs function
Define a VFS function which allows userspace to request that the kernel reflink a range of blocks between two files if the ranges' contents match. The function fits the new VFS ioctl that standardizes the checking for the btrfs EXTENT SAME ioctl. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_reflink.h')
-rw-r--r--fs/xfs/xfs_reflink.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h
index c35ce299281b..df82b2049187 100644
--- a/fs/xfs/xfs_reflink.h
+++ b/fs/xfs/xfs_reflink.h
@@ -43,7 +43,10 @@ extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
xfs_off_t count);
extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
+#define XFS_REFLINK_DEDUPE 1 /* only reflink if contents match */
+#define XFS_REFLINK_ALL (XFS_REFLINK_DEDUPE)
extern int xfs_reflink_remap_range(struct xfs_inode *src, xfs_off_t srcoff,
- struct xfs_inode *dest, xfs_off_t destoff, xfs_off_t len);
+ struct xfs_inode *dest, xfs_off_t destoff, xfs_off_t len,
+ unsigned int flags);
#endif /* __XFS_REFLINK_H */