xfs: split xfs_itruncate_finish

Split the guts of xfs_itruncate_finish that loop over the existing extents
and calls xfs_bunmapi on them into a new helper, xfs_itruncate_externs.
Make xfs_attr_inactive call it directly instead of xfs_itruncate_finish,
which allows to simplify the latter a lot, by only letting it deal with
the data fork.  As a result xfs_itruncate_finish is renamed to
xfs_itruncate_data to make its use case more obvious.

Also remove the sync parameter from xfs_itruncate_data, which has been
unessecary since the introduction of the busy extent list in 2002, and
completely dead code since 2003 when the XFS_BMAPI_ASYNC parameter was
made a no-op.

I can't actually see why the xfs_attr_inactive needs to set the transaction
sync, but let's keep this patch simple and without changes in behaviour.

Also avoid passing a useless argument to xfs_isize_check, and make it
private to xfs_inode.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

1 files changed, 1 insertions, 9 deletions

diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 5a0fcb09fc7..501e4f63054 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -879,15 +879,7 @@ xfs_setattr_size(
 		ip->i_size = iattr->ia_size;
 	} else if (iattr->ia_size <= ip->i_size ||
 		   (iattr->ia_size == 0 && ip->i_d.di_nextents)) {
-		/*
-		 * Signal a sync transaction unless we are truncating an
-		 * already unlinked file on a wsync filesystem.
-		 */
-		error = xfs_itruncate_finish(&tp, ip, iattr->ia_size,
-				    XFS_DATA_FORK,
-				    ((ip->i_d.di_nlink != 0 ||
-				      !(mp->m_flags & XFS_MOUNT_WSYNC))
-				     ? 1 : 0));
+		error = xfs_itruncate_data(&tp, ip, iattr->ia_size);
 		if (error)
 			goto out_trans_abort;