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xfs: remove xfs_reflink_trim_irec_to_next_cow

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We already have to check for overlapping COW extents everytime we
come back to a page in xfs_writepage_map / xfs_map_cow, so this
additional trim is not required.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig
2018-07-11 22:25:59 -07:00
committed by Darrick J. Wong
parent a7b28f72ab
commit fca8c80542
4 changed files with 0 additions and 43 deletions
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33
fs/xfs/xfs_reflink.c
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@@ -500,39 +500,6 @@ xfs_reflink_find_cow_mapping(
return true;
}
/*
* Trim an extent to end at the next CoW reservation past offset_fsb.
*/
void
xfs_reflink_trim_irec_to_next_cow(
struct xfs_inode *ip,
xfs_fileoff_t offset_fsb,
struct xfs_bmbt_irec *imap)
{
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
struct xfs_bmbt_irec got;
struct xfs_iext_cursor icur;
if (!xfs_is_reflink_inode(ip))
return;
/* Find the extent in the CoW fork. */
if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &icur, &got))
return;
/* This is the extent before; try sliding up one. */
if (got.br_startoff < offset_fsb) {
if (!xfs_iext_next_extent(ifp, &icur, &got))
return;
}
if (got.br_startoff >= imap->br_startoff + imap->br_blockcount)
return;
imap->br_blockcount = got.br_startoff - imap->br_startoff;
trace_xfs_reflink_trim_irec(ip, imap);
}
/*
* Cancel CoW reservations for some block range of an inode.
*