60 lines
2.4 KiB
Diff
60 lines
2.4 KiB
Diff
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From 2361620a9d78a4e26ec438b5cc21fe796d411497 Mon Sep 17 00:00:00 2001
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From: Coly Li <colyli@suse.de>
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Date: Mon, 31 Aug 2020 00:02:10 +0800
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Subject: [PATCH] mdadm: treat the Dell softraid array as local array
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Patch-mainline: N/A, in-house usage only as a workaround to Dell's softraid bug
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References: bsc#1175004
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Dell softraid FW uses homehost in md raid superblock to store
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its virtual disk name e.g. "VirtualDisk01". The improper usage
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of md raid super block meta data from Dell softraid S150 utility
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makes mdadm takes such md raid (Dell softraid Virtual Disk) as
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foreign array and won't automatically assemble this array by
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default. Here if an array's homehost name starts with "VirtualDisk"
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then we take it as a Dell software raid and bypass the set_name
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checking. This workaround makes current Dell software raid array
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can be treated as local array and start automatically.
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This workaround patch will be withdrawn after Dell softraid FW
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fixes the improper usage problem on md raid superblock.
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Signed-off-by: Coly Li <colyli@suse.de>
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---
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super1.c | 19 ++++++++++++++++++-
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1 file changed, 18 insertions(+), 1 deletion(-)
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diff --git a/super1.c b/super1.c
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index 7664883..d15067a 100644
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--- a/super1.c
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+++ b/super1.c
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@@ -954,8 +954,25 @@ static int examine_badblocks_super1(struct supertype *st, int fd, char *devname)
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static int match_home1(struct supertype *st, char *homehost)
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{
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struct mdp_superblock_1 *sb = st->sb;
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- int l = homehost ? strlen(homehost) : 0;
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+ char *dell_softraid_header = "VirtualDisk";
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+ int l = strlen(dell_softraid_header);
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+
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+ /*
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+ * Dell softraid FW uses homehost in md raid superblock to store
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+ * its virtual disk name e.g. "VirtualDisk01". The improper usage
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+ * of md raid super block meta data from Dell softraid S150 utility
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+ * makes mdadm takes such md raid (Dell softraid Virtual Disk) as
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+ * foreign array and won't automatically assemble this array by
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+ * default. Here if an array's homehost name starts with "VirtualDisk"
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+ * then we take it as a Dell software raid and bypass the set_name
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+ * checking. This workaround makes current Dell software raid array
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+ * can be treated as local array and start automatically.
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+ */
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+ if (strncmp(sb->set_name, dell_softraid_header, l) == 0)
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+ return 1;
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+ /* Normal cases handleing */
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+ l = homehost ? strlen(homehost) : 0;
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return (l > 0 && l < 32 && sb->set_name[l] == ':' &&
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strncmp(sb->set_name, homehost, l) == 0);
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}
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--
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2.26.2
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