xfs: return the converted extent in __xfs_reflink_convert_cow

We'll need it for the direct I/O code.  Also rename the function to
xfs_reflink_convert_cow_extent to describe it a bit better.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index 8c8c4f4676da..219bc96bfc71 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -332,20 +332,19 @@ xfs_reflink_convert_cow_extent(
         xfs_filblks_t                   count_fsb,
         struct xfs_defer_ops            *dfops)
 {
-        struct xfs_bmbt_irec            irec = *imap;
         xfs_fsblock_t                   first_block;
         int                             nimaps = 1;
 
         if (imap->br_state == XFS_EXT_NORM)
                 return 0;
 
-        xfs_trim_extent(&irec, offset_fsb, count_fsb);
-        trace_xfs_reflink_convert_cow(ip, &irec);
-        if (irec.br_blockcount == 0)
+        xfs_trim_extent(imap, offset_fsb, count_fsb);
+        trace_xfs_reflink_convert_cow(ip, imap);
+        if (imap->br_blockcount == 0)
                 return 0;
-        return xfs_bmapi_write(NULL, ip, irec.br_startoff, irec.br_blockcount,
+        return xfs_bmapi_write(NULL, ip, imap->br_startoff, imap->br_blockcount,
                         XFS_BMAPI_COWFORK | XFS_BMAPI_CONVERT, &first_block,
-                        0, &irec, &nimaps, dfops);
+                        0, imap, &nimaps, dfops);
 }
 
 /* Convert all of the unwritten CoW extents in a file's range to real ones. */