forked from pool/kdump
132 lines
3.1 KiB
Plaintext
132 lines
3.1 KiB
Plaintext
From: Bernhard Walle <bwalle@suse.de>
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Subject: [PATCH] Add udev rule to reload kdump
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References: bnc#389658
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This patch
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- implements "try-restart" in the init script
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- adds a udev rule that uses "try-restart" to reload the kdump kernel
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in case of a memory or CPU hot plug event
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Signed-off-by: Bernhard Walle <bwalle@suse.de>
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---
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Makefile | 1 +
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init/kdump | 47 +++++++++++++++++++++++++++++++++++------------
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udev/70-kdump.rules | 12 ++++++++++++
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udev/Makefile | 9 +++++++++
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4 files changed, 57 insertions(+), 12 deletions(-)
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--- a/Makefile
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+++ b/Makefile
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@@ -30,6 +30,7 @@ install:
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make -C init install
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make -C gdb install
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make -C config install
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+ make -C udev install
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clean:
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make -C src clean
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--- a/init/kdump
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+++ b/init/kdump
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@@ -1,4 +1,4 @@
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-#! /bin/sh
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+#!/bin/bash
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#
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# Copyright 2005 Red Hat, Inc.
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# Author: Jeff Moyer <jmoyer@redhat.com>
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@@ -36,6 +36,25 @@ KDUMP_IDENTIFY_KERNEL=/usr/sbin/kdump-id
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BOOTDIR="/boot"
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+#
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+# Checks if currently a kdump kernel is loaded.
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+#
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+# Returns: 0 (true) if a kdump kernel is loaded,
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+# 1 (false) if the kdump kernel is not loaded and
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+# -1 (false) if the feature is not implemented (too old kernel)
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+kdump_kernel_loaded()
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+{
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+ if [ -r /sys/kernel/kexec_crash_loaded ]; then
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+ if [ "$(cat /sys/kernel/kexec_crash_loaded)" = "1" ]; then
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+ return 0
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+ else
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+ return 1
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+ fi
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+ else
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+ return -1
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+ fi
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+}
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+
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# The default dumper
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#
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# Clean up old stuff if necessary, check the free size
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@@ -301,24 +320,28 @@ case "$1" in
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fi
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;;
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status)
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- if [ -r /sys/kernel/kexec_crash_loaded ]; then
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- if [ "$(cat /sys/kernel/kexec_crash_loaded)" = "1" ]; then
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- echo "kdump kernel loaded"
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- else
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- echo "kdump kernel not loaded"
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- fi
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- else
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- echo "not implemented"
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- fi
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+ kdump_kernel_loaded
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+ loaded=$?
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+ case $? in
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+ 0) echo "kdump kernel loaded" ;;
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+ 1) echo "kdump kernel not loaded" ;;
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+ -1) echo "not implemented" ;;
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+ esac
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;;
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restart|reload)
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$0 stop
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$0 start
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;;
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- condrestart)
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+ condrestart|try-restart)
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+ if kdump_kernel_loaded ; then
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+ $0 start
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+ else
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+ rc_reset
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+ fi
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+ rc_status
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;;
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*)
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- echo $"Usage: $0 {start|stop|status|restart|reload}"
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+ echo $"Usage: $0 {start|stop|status|restart|reload|try-reload}"
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exit 1
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esac
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--- /dev/null
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+++ b/udev/70-kdump.rules
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@@ -0,0 +1,12 @@
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+#
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+# Kdump core headers needs to be regnerated if the CPUs or memory changes.
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+# For this, reload kdump.
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+#
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+# Novell Bug #389658
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+#
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+
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+SUBSYSTEM=="cpu", ACTION=="online", PROGRAM="/etc/init.d/kdump try-restart"
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+SUBSYSTEM=="cpu", ACTION=="offline", PROGRAM="/etc/init.d/kdump try-restart"
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+SUBSYSTEM=="memory", ACTION=="add", PROGRAM="/etc/init.d/kdump try-restart"
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+SUBSYSTEM=="memory", ACTION=="remove", PROGRAM="/etc/init.d/kdump try-restart"
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+
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--- /dev/null
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+++ b/udev/Makefile
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@@ -0,0 +1,9 @@
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+# Simple makefile to build kdump-helper
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+#
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+# (c) 2008, Bernhard Walle <bwalle@suse.de>, SUSE LINUX Products GmbH
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+
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+
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+install:
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+ mkdir -p $(DESTDIR)$(SYSCONFDIR)/udev/rules.d
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+ install -m 0644 70-kdump.rules $(DESTDIR)$(SYSCONFDIR)/udev/rules.d
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+
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