From b11bd671ba8a0268753db25684115acde57d3d32 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Thu, 4 Dec 2014 09:42:24 +1100 Subject: [PATCH] xfs: cleanup xfs_bmse_shift_one goto mess xfs_bmse_shift_one() jumps around determining whether to shift or merge, making the code flow difficult to follow. Clean it up and use direct error returns (including XFS_WANT_CORRUPTED_RETURN) to make the code flow better and be easier to read. Signed-off-by: Dave Chinner Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/libxfs/xfs_bmap.c | 43 +++++++++++++++++-------------------------- 1 file changed, 17 insertions(+), 26 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 20d2e96..0628a67 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -5544,35 +5544,29 @@ xfs_bmse_shift_one( startoff = got.br_startoff - offset_shift_fsb; /* delalloc extents should be prevented by caller */ - XFS_WANT_CORRUPTED_GOTO(!isnullstartblock(got.br_startblock), - out_error); + XFS_WANT_CORRUPTED_RETURN(!isnullstartblock(got.br_startblock)); /* - * If this is the first extent in the file, make sure there's enough - * room at the start of the file and jump right to the shift as there's - * no left extent to merge. + * Check for merge if we've got an extent to the left, otherwise make + * sure there's enough room at the start of the file for the shift. */ - if (*current_ext == 0) { - if (got.br_startoff < offset_shift_fsb) - return -EINVAL; - goto shift_extent; - } + if (*current_ext) { + /* grab the left extent and check for a large enough hole */ + leftp = xfs_iext_get_ext(ifp, *current_ext - 1); + xfs_bmbt_get_all(leftp, &left); - /* grab the left extent and check for a large enough hole */ - leftp = xfs_iext_get_ext(ifp, *current_ext - 1); - xfs_bmbt_get_all(leftp, &left); + if (startoff < left.br_startoff + left.br_blockcount) + return -EINVAL; - if (startoff < left.br_startoff + left.br_blockcount) + /* check whether to merge the extent or shift it down */ + if (xfs_bmse_can_merge(&left, &got, offset_shift_fsb)) { + return xfs_bmse_merge(ip, whichfork, offset_shift_fsb, + *current_ext, gotp, leftp, cur, + logflags); + } + } else if (got.br_startoff < offset_shift_fsb) return -EINVAL; - /* check whether to merge the extent or shift it down */ - if (!xfs_bmse_can_merge(&left, &got, offset_shift_fsb)) - goto shift_extent; - - return xfs_bmse_merge(ip, whichfork, offset_shift_fsb, *current_ext, - gotp, leftp, cur, logflags); - -shift_extent: /* * Increment the extent index for the next iteration, update the start * offset of the in-core extent and update the btree if applicable. @@ -5589,14 +5583,11 @@ shift_extent: got.br_blockcount, &i); if (error) return error; - XFS_WANT_CORRUPTED_GOTO(i == 1, out_error); + XFS_WANT_CORRUPTED_RETURN(i == 1); got.br_startoff = startoff; return xfs_bmbt_update(cur, got.br_startoff, got.br_startblock, got.br_blockcount, got.br_state); - -out_error: - return error; } /* -- 2.7.4