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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-10-30 02:47:06 +0300 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2018-10-30 02:47:06 +0300 |
| commit | 3f68c1f562f1e4c5e1a515b392a2e0a509a342d5 (patch) | |
| tree | 0514695ce6f460cc00d532e88438c14af1431594 /fs/xfs/xfs_reflink.h | |
| parent | 9f04aaffddb3e487f3eda1945f1a9531d6cc7628 (diff) | |
| download | linux-3f68c1f562f1e4c5e1a515b392a2e0a509a342d5.tar.xz | |
xfs: support returning partial reflink results
Back when the XFS reflink code only supported clone_file_range, we were
only able to return zero or negative error codes to userspace. However,
now that copy_file_range (which returns bytes copied) can use XFS'
clone_file_range, we have the opportunity to return partial results.
For example, if userspace sends a 1GB clone request and we run out of
space halfway through, we at least can tell userspace that we completed
512M of that request like a regular write.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_reflink.h')
| -rw-r--r-- | fs/xfs/xfs_reflink.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h index c3c46c276fe1..cbc26ff79a8f 100644 --- a/fs/xfs/xfs_reflink.h +++ b/fs/xfs/xfs_reflink.h @@ -27,7 +27,7 @@ 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); -extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, +extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t len, unsigned int remap_flags); extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp, |