diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-03 09:11:41 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-05 16:26:26 -0700 |
| commit | cc714660bb8b14dd897cd805bbcd8b76a7606289 (patch) | |
| tree | 7c55c2dba94c899cc23f07e2333c99d2b9dc9313 /fs/xfs/xfs_reflink.h | |
| parent | 9fe26045e98f8787999f6aa45aec35d16565c1bd (diff) | |
| download | linux-cc714660bb8b14dd897cd805bbcd8b76a7606289.tar.gz linux-cc714660bb8b14dd897cd805bbcd8b76a7606289.tar.bz2 linux-cc714660bb8b14dd897cd805bbcd8b76a7606289.zip | |
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.h | 5 |
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 */ |