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From 5cfb79dea26d9d7266f79c7c196a1a9f70c16a28 Mon Sep 17 00:00:00 2001
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From: Gioh Kim <gi-oh.kim@cloud.ionos.com>
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Date: Tue, 16 Apr 2019 18:08:17 +0200
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Subject: [RHEL7.9 PATCH 74/77] Assemble: print error message if mdadm fails
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assembling with --uuid option
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When mdadm tries to assemble one working device and one zeroed-out device,
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it failed but print successful message because there is --uuid option.
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Following script always reproduce it.
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dd if=/dev/zero of=/dev/ram0 oflag=direct
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dd if=/dev/zero of=/dev/ram1 oflag=direct
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./mdadm -C /dev/md111 -e 1.2 --uuid="12345678:12345678:12345678:12345678" \
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-l1 -n2 /dev/ram0 /dev/ram1
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./mdadm -S /dev/md111
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dd if=/dev/zero of=/dev/ram1 oflag=direct
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./mdadm -A /dev/md111 --uuid="12345678:12345678:12345678:12345678" \
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/dev/ram0 /dev/ram1
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Following is message from mdadm.
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mdadm: No super block found on /dev/ram1 (Expected magic a92b4efc, got 00000000)
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mdadm: no RAID superblock on /dev/ram1
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mdadm: /dev/md111 assembled from 1 drive - need all 2 to start it (use --run to insist).
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The mdadm say that it assembled but mdadm does not create /dev/md111.
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The message is wrong.
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After applying this patch, mdadm reports error correctly as following.
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mdadm: No super block found on /dev/ram1 (Expected magic a92b4efc, got 00000000)
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mdadm: no RAID superblock on /dev/ram1
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mdadm: /dev/ram1 has no superblock - assembly aborted
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Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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Assemble.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/Assemble.c b/Assemble.c
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index 6b5a7c8..2ed5884 100644
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--- a/Assemble.c
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+++ b/Assemble.c
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@@ -269,7 +269,7 @@ static int select_devices(struct mddev_dev *devlist,
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if (auto_assem || !inargv)
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/* Ignore unrecognised devices during auto-assembly */
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goto loop;
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- if (ident->uuid_set || ident->name[0] ||
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+ if (ident->name[0] ||
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ident->super_minor != UnSet)
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/* Ignore unrecognised device if looking for
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* specific array */
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--
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2.7.5
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