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From 64bf4dff34301a4b44883a8bc03f7835faef121e Mon Sep 17 00:00:00 2001
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From: Lidong Zhong <lidong.zhong@suse.com>
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Date: Mon, 14 Sep 2020 10:52:18 +0800
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Subject: [PATCH 090/108] Detail: show correct raid level when the array is
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inactive
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Sometimes the raid level in the output of `mdadm -D /dev/mdX` is
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misleading when the array is in inactive state. Here is a testcase for
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introduction.
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1\ creating a raid1 device with two disks. Specify a different hostname
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rather than the real one for later verfication.
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node1:~ # mdadm --create /dev/md0 --homehost TESTARRAY -o -l 1 -n 2 /dev/sdb
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/dev/sdc
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2\ remove one of the devices and reboot
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3\ show the detail of raid1 device
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node1:~ # mdadm -D /dev/md127
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/dev/md127:
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Version : 1.2
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Raid Level : raid0
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Total Devices : 1
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Persistence : Superblock is persistent
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State : inactive
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Working Devices : 1
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You can see that the "Raid Level" in /dev/md127 is raid0 now.
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After step 2\ is done, the degraded raid1 device is recognized
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as a "foreign" array in 64-md-raid-assembly.rules. And thus the
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timer to activate the raid1 device is not triggered. The array
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level returned from GET_ARRAY_INFO ioctl is 0. And the string
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shown for "Raid Level" is
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str = map_num(pers, array.level);
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And the definition of pers is
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mapping_t pers[] = {
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{ "linear", LEVEL_LINEAR},
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{ "raid0", 0},
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{ "0", 0}
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...
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So the misleading "raid0" is shown in this testcase.
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Changelog:
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v1: don't show "Raid Level" when array is inactive
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Signed-off-by: Lidong Zhong <lidong.zhong@suse.com>
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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Detail.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/Detail.c b/Detail.c
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index 24eeba0..b6587c8 100644
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--- a/Detail.c
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+++ b/Detail.c
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@@ -224,7 +224,10 @@ int Detail(char *dev, struct context *c)
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}
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/* Ok, we have some info to print... */
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- str = map_num(pers, array.level);
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+ if (inactive)
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+ str = map_num(pers, info->array.level);
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+ else
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+ str = map_num(pers, array.level);
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if (c->export) {
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if (array.raid_disks) {
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--
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2.7.5
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