[OE-core] [PATCH] kexec-tools: added the script kdump
Wenlin Kang
wenlin.kang at windriver.com
Fri Dec 11 06:16:53 UTC 2015
Added the script file kdump,it provides the follow support:
1. Load a kdump kernel image into memory;
2. Copy away vmcore when system panic.
Signed-off-by: Wenlin Kang <wenlin.kang at windriver.com>
---
meta/recipes-kernel/kexec/kexec-tools.inc | 5 +-
meta/recipes-kernel/kexec/kexec-tools/kdump | 163 +++++++++++++++++++++++
meta/recipes-kernel/kexec/kexec-tools/kdump.conf | 18 +++
meta/recipes-kernel/kexec/kexec-tools_2.0.10.bb | 8 ++
4 files changed, 193 insertions(+), 1 deletion(-)
create mode 100755 meta/recipes-kernel/kexec/kexec-tools/kdump
create mode 100644 meta/recipes-kernel/kexec/kexec-tools/kdump.conf
diff --git a/meta/recipes-kernel/kexec/kexec-tools.inc b/meta/recipes-kernel/kexec/kexec-tools.inc
index 7797a25..758a3a7 100644
--- a/meta/recipes-kernel/kexec/kexec-tools.inc
+++ b/meta/recipes-kernel/kexec/kexec-tools.inc
@@ -8,7 +8,10 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=ea5bed2f60d357618ca161ad539f7c0a \
file://kexec/kexec.c;beginline=1;endline=20;md5=af10f6ae4a8715965e648aa687ad3e09"
DEPENDS = "zlib xz"
-SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz"
+SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz \
+ file://kdump \
+ file://kdump.conf \
+"
PR = "r1"
diff --git a/meta/recipes-kernel/kexec/kexec-tools/kdump b/meta/recipes-kernel/kexec/kexec-tools/kdump
new file mode 100755
index 0000000..3fb133f
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/kdump
@@ -0,0 +1,163 @@
+#! /bin/sh
+#
+# kdump
+#
+# Description: The kdump script provides the support:
+# 1. Load a kdump kernel image into memory;
+# 2. Copy away vmcore when system panic.
+#
+
+#default
+KDUMP_KVER="`uname -r`"
+KDUMP_KIMAGE="/boot/bzImage-${KDUMP_KVER}"
+KDUMP_CMDLINE="`cat /proc/cmdline`"
+KDUMP_CMDLINE_APPEND="kdump_needed maxcpus=1 irqpoll reset_devices"
+KDUMP_VMCORE_PATH="/var/crash/`date +"%Y-%m-%d"`"
+
+#get right kernel image
+march="`uname -m`"
+case ${march} in
+ x86*|i?86)
+ ;;
+ *)
+ KDUMP_KIMAGE="/boot/uImage-${KDUMP_KVER}"
+ ;;
+esac
+
+KEXEC=usr/sbin/kexec
+KEXEC_ARGS="-p"
+
+MAKEDUMPFILE=/usr/bin/makedumpfile
+MAKEDUMPFILE_ARGS="-E -d 1"
+
+LOGGER="logger -p info -t kdump"
+
+if [ -f /etc/sysconfig/kdump.conf ]; then
+ . /etc/sysconfig/kdump.conf
+fi
+
+do_check()
+{
+ #check makedumpfile
+ if [ ! -e ${MAKEDUMPFILE} -o ! -x ${MAKEDUMPFILE} ] ;then
+ echo "No makedumpfile found."
+ return 1;
+ fi
+
+ #check kexec
+ if [ ! -e ${KEXEC} -o ! -x ${KEXEC} ] ;then
+ echo "No kexec found."
+ return 1;
+ fi
+
+ #check whether kdump kernel image exists on the system
+ if [ ! -f ${KDUMP_KIMAGE} ]; then
+ echo "No kdump kernel image found."
+ return 1
+ fi
+}
+
+do_save_vmcore()
+{
+ mkdir -p ${KDUMP_VMCORE_PATH}
+ echo "Saving a vmcore to ${KDUMP_VMCORE_PATH}."
+
+ ${MAKEDUMPFILE} ${MAKEDUMPFILE_ARGS} /proc/vmcore ${KDUMP_VMCORE_PATH}/vmcore-"`date +"%H:%M:%S"`"
+# cp --sparse=always /proc/vmcore ${KDUMP_VMCORE_PATH}/vmcore-"`date +"%H:%M:%S"`"
+ rc=$?
+ if [ ${rc} == 0 ]; then
+ ${LOGGER} "Saved a vmcore to ${KDUMP_VMCORE_PATH}."
+ else
+ ${LOGGER} "Failed to save vmcore!"
+ fi
+ return ${rc}
+}
+
+do_start()
+{
+ #check file
+ do_check
+
+ #check whether the running kernel supports kdump.
+ if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
+ echo "Kdump isn't supported on the running kernel!!!"
+ ${LOGGER} "Kdump isn't supported on the running kernel!!!"
+ return 1
+ fi
+
+ #check whether kdump kernel image has been loaded
+ rc=`cat /sys/kernel/kexec_crash_loaded`
+ if [ ${rc} != 0 ]; then
+ echo "Kdump is already running.";
+ ${LOGGER} "Kdump is already running."
+ return 0
+ fi
+
+ #check the running kernel cmdline option,insure "crashkenrel=" always set.
+ grep -q crashkernel= /proc/cmdline
+ if [ $? != 0 ]; then
+ echo "Kdump isn't supported on the running kernel,please check boot option!!!"
+ ${LOGGER} "Kdump isn't supported on the running kernel,please check boot option!!!"
+ return 1
+ fi
+
+ #handle kdump cmdline parameters, remove some useless options
+ kcmdline=""
+ for x in `cat /proc/cmdline`; do
+ case $x in
+ crashkernel*)
+ ;;
+ *)
+ kcmdline="${kcmdline} $x"
+ ;;
+ esac
+ done
+
+ KDUMP_CMDLINE="${kcmdline} ${KDUMP_CMDLINE_APPEND}"
+
+ #Load the kdump kernel image
+ ${KEXEC} ${KEXEC_ARGS} "${KDUMP_KIMAGE}" --append="${KDUMP_CMDLINE}"
+ if [ $? != 0 ]; then
+ echo "Failed to load kdump kernel!"
+ ${LOGGER} "Failed to load kdump kernel!"
+ return 1
+ fi
+
+ echo "Kdump started up."
+ ${LOGGER} "Kdump started up."
+}
+
+do_stop()
+{
+ ${KEXEC} -p -u 2>/dev/null
+ if [ $? == 0 ]; then
+ echo "Kdump has been stopped."
+ ${LOGGER} "Kdump has been stopped."
+ else
+ echo "Failed to stop kdump!"
+ ${LOGGER} "Failed to stop kdump!"
+ fi
+}
+
+case "$1" in
+ start)
+ if [ -s /proc/vmcore ]; then
+ do_save_vmcore
+ reboot
+ else
+ do_start
+ fi
+ ;;
+ restart)
+ do_stop
+ do_start
+ ;;
+ stop)
+ do_stop
+ ;;
+ *)
+ echo $"Usage: $0 {start|stop|restart}"
+ exit 1
+esac
+
+exit $?
diff --git a/meta/recipes-kernel/kexec/kexec-tools/kdump.conf b/meta/recipes-kernel/kexec/kexec-tools/kdump.conf
new file mode 100644
index 0000000..42a2435
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/kdump.conf
@@ -0,0 +1,18 @@
+#the kdump kernel version string.
+#KDUMP_KVER="`uname -r`"
+
+#this will be passed to the kdump kernel as kdump kernel command line, it
+#usually comes from /proc/cmdline
+#KDUMP_CMDLINE="`cat /proc/cmdline`"
+
+# append arguments to the kdump commandline
+#KDUMP_CMDLINE_APPEND="kdump_needed maxcpus=1 irqpoll reset_devices"
+
+#the kernel image for kdump
+#KDUMP_KIMAGE="/boot/bzImage-${KDUMP_KVER}"
+
+#Where to save the vmcore
+#KDUMP_VMCORE_PATH="/var/crash/`date +"%Y-%m-%d"`"
+
+#the arguments to makedumpfile
+MAKEDUMPFILE_ARGS="--dump-dmesg -x /boot/vmlinux-`uname -r`"
diff --git a/meta/recipes-kernel/kexec/kexec-tools_2.0.10.bb b/meta/recipes-kernel/kexec/kexec-tools_2.0.10.bb
index ffdb983..f211217 100644
--- a/meta/recipes-kernel/kexec/kexec-tools_2.0.10.bb
+++ b/meta/recipes-kernel/kexec/kexec-tools_2.0.10.bb
@@ -17,6 +17,14 @@ PACKAGES =+ "kexec kdump vmcore-dmesg"
ALLOW_EMPTY_${PN} = "1"
RRECOMMENDS_${PN} = "kexec kdump vmcore-dmesg"
+FILES_${PN} =+ "${sysconfig}/init.d/kdump ${sysconfig}/sysconfig/kdump.conf"
FILES_kexec = "${sbindir}/kexec"
FILES_kdump = "${sbindir}/kdump"
FILES_vmcore-dmesg = "${sbindir}/vmcore-dmesg"
+
+do_install_append () {
+ install -d ${D}${sysconfdir}/init.d
+ install -m 0755 ${WORKDIR}/kdump ${D}${sysconfdir}/init.d/kdump
+ install -d ${D}${sysconfdir}/sysconfig
+ install -m 0644 ${WORKDIR}/kdump.conf ${D}${sysconfdir}/sysconfig
+}
--
1.9.1
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