File 1003-mdadm-treat-the-Dell-softraid-array-as-local-array.patch of Package mdadm
From 1b1936b64511186ef0ea78b8b147825302f8ef56 Mon Sep 17 00:00:00 2001
From: Coly Li <colyli@suse.de>
Date: Mon, 31 Aug 2020 00:02:10 +0800
Subject: [PATCH 1003/1005] mdadm: treat the Dell softraid array as local array
Dell softraid FW uses homehost in md raid superblock to store
its virtual disk name e.g. "VirtualDisk01". The improper usage
of md raid super block meta data from Dell softraid S150 utility
makes mdadm takes such md raid (Dell softraid Virtual Disk) as
foreign array and won't automatically assemble this array by
default. Here if an array's homehost name starts with "VirtualDisk"
then we take it as a Dell software raid and bypass the set_name
checking. This workaround makes current Dell software raid array
can be treated as local array and start automatically.
This workaround patch will be withdrawn after Dell softraid FW
fixes the improper usage problem on md raid superblock.
Signed-off-by: Coly Li <colyli@suse.de>
---
super1.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/super1.c b/super1.c
index fe3c4c6..2ad373d 100644
--- a/super1.c
+++ b/super1.c
@@ -958,8 +958,25 @@ static int examine_badblocks_super1(struct supertype *st, int fd, char *devname)
static int match_home1(struct supertype *st, char *homehost)
{
struct mdp_superblock_1 *sb = st->sb;
- int l = homehost ? strlen(homehost) : 0;
+ char *dell_softraid_header = "VirtualDisk";
+ int l = strlen(dell_softraid_header);
+ /*
+ * Dell softraid FW uses homehost in md raid superblock to store
+ * its virtual disk name e.g. "VirtualDisk01". The improper usage
+ * of md raid super block meta data from Dell softraid S150 utility
+ * makes mdadm takes such md raid (Dell softraid Virtual Disk) as
+ * foreign array and won't automatically assemble this array by
+ * default. Here if an array's homehost name starts with "VirtualDisk"
+ * then we take it as a Dell software raid and bypass the set_name
+ * checking. This workaround makes current Dell software raid array
+ * can be treated as local array and start automatically.
+ */
+ if (strncmp(sb->set_name, dell_softraid_header, l) == 0)
+ return 1;
+
+ /* Normal cases handleing */
+ l = homehost ? strlen(homehost) : 0;
return (l > 0 && l < 32 && sb->set_name[l] == ':' &&
strncmp(sb->set_name, homehost, l) == 0);
}
--
2.48.1
