87 lines
3.2 KiB
Diff
87 lines
3.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Axtens <dja@axtens.net>
|
|
Date: Mon, 19 Jul 2021 14:35:55 +1000
|
|
Subject: [PATCH] powerpc: adjust setting of prefix for signed binary case
|
|
|
|
On RHEL-signed powerpc grub, we sign a grub with -p /grub2 and expect
|
|
that there's a boot partition.
|
|
|
|
Unfortunately grub_set_prefix_and_root tries to convert this to
|
|
($fwdevice)/grub2. This ends up being (ieee1275/disk)/grub2 and that
|
|
falls apart pretty quickly - there's no file-system on ieee1275/disk,
|
|
and it makes the search routine try things like
|
|
(ieee1275/disk,msdos2)(ieee1275/disk)/grub2 which also doesn't work.
|
|
|
|
Detect if we would be about to create (ieee1275/disk)/path and don't:
|
|
preserve a prefix of /path instead and hope the search later finds us.
|
|
|
|
Related: rhbz#1899864
|
|
|
|
Signed-off-by: Daniel Axtens <dja@axtens.net>
|
|
[rharwood@redhat.com: squash in fixup commit]
|
|
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
|
|
---
|
|
grub-core/kern/main.c | 47 +++++++++++++++++++++++++++++++++++++++++++----
|
|
1 file changed, 43 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/grub-core/kern/main.c b/grub-core/kern/main.c
|
|
index 353a62ef1e1..dbd4f596fbe 100644
|
|
--- a/grub-core/kern/main.c
|
|
+++ b/grub-core/kern/main.c
|
|
@@ -217,12 +217,51 @@ grub_set_prefix_and_root (void)
|
|
{
|
|
char *prefix_set;
|
|
|
|
- prefix_set = grub_xasprintf ("(%s)%s", device, path ? : "");
|
|
- if (prefix_set)
|
|
+#ifdef __powerpc__
|
|
+ /* We have to be careful here on powerpc-ieee1275 + signed grub. We
|
|
+ will have signed something with a prefix that doesn't have a device
|
|
+ because we cannot know in advance what partition we're on.
|
|
+
|
|
+ We will have had !device earlier, so we will have set device=fwdevice
|
|
+ However, we want to make sure we do not end up setting prefix to be
|
|
+ ($fwdevice)/path, because we will then end up trying to boot or search
|
|
+ based on a prefix of (ieee1275/disk)/path, which will not work because
|
|
+ it's missing a partition.
|
|
+
|
|
+ Also:
|
|
+ - You can end up with a device with an FS directly on it, without
|
|
+ a partition, e.g. ieee1275/cdrom.
|
|
+
|
|
+ - powerpc-ieee1275 + grub-install sets e.g. prefix=(,gpt2)/path,
|
|
+ which will have now been extended to device=$fwdisk,partition
|
|
+ and path=/path
|
|
+
|
|
+ - PowerVM will give us device names like
|
|
+ ieee1275//vdevice/v-scsi@3000006c/disk@8100000000000000
|
|
+ and we don't want to try to encode some sort of truth table about
|
|
+ what sorts of paths represent disks with partition tables and those
|
|
+ without partition tables.
|
|
+
|
|
+ So we act unless there is a comma in the device, which would indicate
|
|
+ a partition has already been specified.
|
|
+
|
|
+ (If we only have a path, the code in normal to discover config files
|
|
+ will try both without partitions and then with any partitions so we
|
|
+ will cover both CDs and HDs.)
|
|
+ */
|
|
+ if (grub_strchr (device, ',') == NULL)
|
|
+ grub_env_set ("prefix", path);
|
|
+ else
|
|
+#endif
|
|
{
|
|
- grub_env_set ("prefix", prefix_set);
|
|
- grub_free (prefix_set);
|
|
+ prefix_set = grub_xasprintf ("(%s)%s", device, path ? : "");
|
|
+ if (prefix_set)
|
|
+ {
|
|
+ grub_env_set ("prefix", prefix_set);
|
|
+ grub_free (prefix_set);
|
|
+ }
|
|
}
|
|
+
|
|
grub_env_set ("root", device);
|
|
}
|
|
|