File 0207-handle_module_aliases.patch of Package dracut.12460
From: Fabian Vogt <fvogt@suse.com>
Date: Thu, 21 Jan 2016 12:38:05 +0100
Subject: [PATCH] Correctly handle module aliases
Handle module aliases correctly to not generate unbootable
initrds with different kernel versions. Fix for boo#962694
See the diff for a detailed explanation.
---
dracut.sh | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
Index: dracut-044/dracut.sh
===================================================================
--- dracut-044.orig/dracut.sh
+++ dracut-044/dracut.sh
@@ -1214,6 +1214,27 @@ if [[ $hostonly ]]; then
while read m rest || [ -n "$m" ]; do
host_modules["$m"]=1
done </proc/modules
+
+ # Explanation of the following section:
+ # Since kernel 4.4, mpt3sas is a complete replacement for mpt2sas.
+ # mpt3sas has an alias to mpt2sas now, but since mpt3sas isn't loaded
+ # when generating the initrd from kernel < 4.4, it's not included.
+ # The other direction has the same issue:
+ # When generating the initrd from kernel >= 4.4, mpt2sas isn't loaded,
+ # so it's not included.
+ # Both ways result in an unbootable initrd.
+
+ # also add aliases of loaded modules
+ for mod in "${!host_modules[@]}"; do
+ aliases=$(modinfo -F alias "$mod" 2>&1)
+ for alias in $aliases; do
+ host_modules["$alias"]=1
+ done
+ # mod might be an alias in the target kernel, find the real module
+ mod_filename=$(modinfo -k "$kernel" "$mod" -F filename)
+ [ $? -ne 0 ] && continue
+ host_modules["$(basename -s .ko "$mod_filename")"]=1
+ done
fi
unset m