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From c43515c7ba1d13d54c92d43b76ca0a661c097292 Mon Sep 17 00:00:00 2001
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From: Heinz Mauelshagen <heinzm@redhat.com>
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Date: Fri, 31 Aug 2018 19:03:52 +0200
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Subject: [PATCH] lvconvert: avoid superfluous interim raid type
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When converting striped/raid0*/raid6_n_6 <-> raid4,
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avoid superfluous interim raid5_n layout.
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Related: rhbz1447809
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(cherry picked from commit 22a13043683a5647e8cc4e3aead911e5269ffd2f)
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(cherry picked from commit 0e03c686191b036a7cd6e570888793ddbdd5f958)
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---
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lib/metadata/raid_manip.c | 9 ++++-----
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1 file changed, 4 insertions(+), 5 deletions(-)
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diff --git a/lib/metadata/raid_manip.c b/lib/metadata/raid_manip.c
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index d3e3a20..3eee77a 100644
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--- a/lib/metadata/raid_manip.c
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+++ b/lib/metadata/raid_manip.c
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@@ -6140,7 +6140,7 @@ static int _set_convenient_raid145610_segtype_to(const struct lv_segment *seg_fr
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seg_flag = SEG_RAID6_N_6;
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if (segtype_is_linear(*segtype) ||
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- (!segtype_is_raid10(*segtype) && !segtype_is_striped(*segtype)))
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+ (!segtype_is_raid4(*segtype) && !segtype_is_raid10(*segtype) && !segtype_is_striped(*segtype)))
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seg_flag = SEG_RAID5_N;
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/* raid1 -> */
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@@ -6209,10 +6209,9 @@ static int _set_convenient_raid145610_segtype_to(const struct lv_segment *seg_fr
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lvseg_name(seg_from), display_lvname(seg_from->lv), *new_image_count);
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}
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- /* raid4 -> !raid4/raid5* */
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- } else if (seg_is_raid4(seg_from) &&
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- !segtype_is_raid4(*segtype) && !segtype_is_any_raid5(*segtype)) {
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- seg_flag = SEG_RAID5_N;
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+ /* raid4 -> * */
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+ } else if (seg_is_raid4(seg_from) && !segtype_is_raid4(*segtype) && !segtype_is_striped(*segtype)) {
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+ seg_flag = segtype_is_any_raid6(*segtype) ? SEG_RAID6_N_6 : SEG_RAID5_N;
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/* raid6 -> striped/raid0/raid5/raid10 */
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} else if (seg_is_any_raid6(seg_from)) {
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--
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1.8.3.1
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