grub2/0145-grub-probe-Don-t-skip-dev-mapper-dm-devices.patch

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From 6d28b3bd266e1d935de5916860645ea8cabf2335 Mon Sep 17 00:00:00 2001
From: Oleg Solovyov <mcpain@altlinux.org>
Date: Fri, 11 May 2018 13:55:46 +0300
Subject: [PATCH] grub-probe: Don't skip /dev/mapper/dm-* devices
This patch ensures that grub-probe will find the root device placed in
/dev/mapper/dm-[0-9]+-.* e.g. device named /dev/mapper/dm-0-luks will be
found and grub.cfg will be updated properly, enabling the system to boot.
Signed-off-by: Oleg Solovyov <mcpain@altlinux.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
grub-core/osdep/unix/getroot.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/grub-core/osdep/unix/getroot.c b/grub-core/osdep/unix/getroot.c
index 4bf37b027be..3046e22cc01 100644
--- a/grub-core/osdep/unix/getroot.c
+++ b/grub-core/osdep/unix/getroot.c
@@ -428,8 +428,11 @@ grub_find_device (const char *dir, dev_t dev)
{
#ifdef __linux__
/* Skip device names like /dev/dm-0, which are short-hand aliases
- to more descriptive device names, e.g. those under /dev/mapper */
- if (ent->d_name[0] == 'd' &&
+ to more descriptive device names, e.g. those under /dev/mapper.
+ Also, don't skip devices which names start with dm-[0-9] in
+ directories below /dev, e.g. /dev/mapper/dm-0-luks. */
+ if (strcmp (dir, "/dev") == 0 &&
+ ent->d_name[0] == 'd' &&
ent->d_name[1] == 'm' &&
ent->d_name[2] == '-' &&
ent->d_name[3] >= '0' &&