From a7199c141cd75ffe2d25ea4ca2dfe7935d7f5f83 Mon Sep 17 00:00:00 2001
From: Kairui Song <kasong@redhat.com>
Date: Fri, 31 Jul 2020 16:47:11 +0800
Subject: [PATCH] Add a kernel install hook to clean up kdump initramfs

Kdump service will create kdump initramfs when needed, but it won't
clean up the kdump initramfs on kernel uninstall. So create a kernel
install hook to do the clean up job.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
---
 60-kdump.install | 30 ++++++++++++++++++++++++++++++
 kexec-tools.spec |  3 +++
 2 files changed, 33 insertions(+)
 create mode 100755 60-kdump.install

diff --git a/60-kdump.install b/60-kdump.install
new file mode 100755
index 0000000..0a3b40e
--- /dev/null
+++ b/60-kdump.install
@@ -0,0 +1,30 @@
+#!/usr/bin/bash
+
+COMMAND="$1"
+KERNEL_VERSION="$2"
+BOOT_DIR_ABS="$3"
+KERNEL_IMAGE="$4"
+
+if ! [[ ${KERNEL_INSTALL_MACHINE_ID-x} ]]; then
+    exit 0
+fi
+
+if [[ -d "$BOOT_DIR_ABS" ]]; then
+    KDUMP_INITRD="initrdkdump"
+else
+    BOOT_DIR_ABS="/boot"
+    KDUMP_INITRD="initramfs-${KERNEL_VERSION}kdump.img"
+fi
+
+ret=0
+case "$COMMAND" in
+    add)
+        # Do nothing, kdump initramfs is strictly host only
+        # and managed by kdump service
+        ;;
+    remove)
+        rm -f -- "$BOOT_DIR_ABS/$KDUMP_INITRD"
+        ret=$?
+        ;;
+esac
+exit $ret
diff --git a/kexec-tools.spec b/kexec-tools.spec
index 8505c78..5a14d48 100644
--- a/kexec-tools.spec
+++ b/kexec-tools.spec
@@ -36,6 +36,7 @@ Source26: live-image-kdump-howto.txt
 Source27: early-kdump-howto.txt
 Source28: kdump-udev-throttler
 Source29: kdump.sysconfig.aarch64
+Source30: 60-kdump.install
 
 #######################################
 # These are sources for mkdumpramfs
@@ -203,6 +204,7 @@ install -m 644 %{SOURCE14} $RPM_BUILD_ROOT%{_udevrulesdir}/98-kexec.rules
 install -m 644 %{SOURCE15} $RPM_BUILD_ROOT%{_mandir}/man5/kdump.conf.5
 install -m 644 %{SOURCE16} $RPM_BUILD_ROOT%{_unitdir}/kdump.service
 install -m 755 -D %{SOURCE22} $RPM_BUILD_ROOT%{_prefix}/lib/systemd/system-generators/kdump-dep-generator.sh
+install -m 755 -D %{SOURCE30} $RPM_BUILD_ROOT%{_prefix}/lib/kernel/install.d/60-kdump.install
 
 %ifarch %{ix86} x86_64 ppc64 s390x ppc64le aarch64
 install -m 755 makedumpfile-%{mkdf_ver}/makedumpfile $RPM_BUILD_ROOT/usr/sbin/makedumpfile
@@ -343,6 +345,7 @@ done
 %{_mandir}/man5/*
 %{_unitdir}/kdump.service
 %{_prefix}/lib/systemd/system-generators/kdump-dep-generator.sh
+%{_prefix}/lib/kernel/install.d/60-kdump.install
 %doc News
 %license COPYING
 %doc TODO