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48 lines
2.0 KiB
48 lines
2.0 KiB
8 months ago
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Javier Martinez Canillas <javierm@redhat.com>
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Date: Tue, 11 Aug 2020 13:16:45 +0200
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Subject: [PATCH] blscfg: Don't hardcode an env var as fallback for the BLS
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options field
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If the BLS fragments don't have an options field or if this was set to an
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environment variable that was not defined in the grubenv file, the blscfg
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module searches for a default_kernelopts variable that is defined in the
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grub.cfg file.
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But the blscfg module shouldn't hardcode fallbacks variables and instead
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this logic should be handled in the GRUB config file itself.
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Also, add a comment explaining where the kernelopts variable is supposed
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to be defined and what is the process for the user to change its value.
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Resolves: rhbz#1850193
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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---
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util/grub.d/10_linux.in | 12 +++++++++++-
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1 file changed, 11 insertions(+), 1 deletion(-)
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diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in
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index 58d185047..48857bb81 100644
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--- a/util/grub.d/10_linux.in
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+++ b/util/grub.d/10_linux.in
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@@ -158,7 +158,17 @@ linux_entry ()
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populate_header_warn
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cat << EOF
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-set default_kernelopts="root=${linux_root_device_thisversion} ro ${args}"
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+# The kernelopts variable should be defined in the grubenv file. But to ensure that menu
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+# entries populated from BootLoaderSpec files that use this variable work correctly even
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+# without a grubenv file, define a fallback kernelopts variable if this has not been set.
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+#
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+# The kernelopts variable in the grubenv file can be modified using the grubby tool or by
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+# executing the grub2-mkconfig tool. For the latter, the values of the GRUB_CMDLINE_LINUX
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+# and GRUB_CMDLINE_LINUX_DEFAULT options from /etc/default/grub file are used to set both
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+# the kernelopts variable in the grubenv file and the fallback kernelopts variable.
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+if [ -z "\${kernelopts}" ]; then
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+ set kernelopts="root=${linux_root_device_thisversion} ro ${args}"
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+fi
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insmod blscfg
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blscfg
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