kexec-tools: added the script kdump

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.

(From OE-Core rev: c2492edcb9366ed1741fc6be7d41bc17844041fd)

Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 193 insertions, 1 deletions

diff --git a/meta/recipes-kernel/kexec/kexec-tools.inc b/meta/recipes-kernel/kexec/kexec-tools.inc
index 7797a25738..758a3a78b8 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 0000000000..3fb133fb35
--- /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 $?
diff --git a/meta/recipes-kernel/kexec/kexec-tools/kdump.conf b/meta/recipes-kernel/kexec/kexec-tools/kdump.conf
new file mode 100644
index 0000000000..42a2435b96
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/kdump.conf
@@ -0,0 +1,18 @@
+#the kdump kernel version string.
+#KDUMP_KVER="`uname -r`"
+
+#this will be passed to the kdump kernel as kdump kernel command line, it
+#usually comes from /proc/cmdline
+#KDUMP_CMDLINE="`cat /proc/cmdline`"
+
+# append arguments to the kdump commandline
+#KDUMP_CMDLINE_APPEND="kdump_needed maxcpus=1 irqpoll reset_devices"
+
+#the kernel image for kdump
+#KDUMP_KIMAGE="/boot/bzImage-${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 ffdb983a41..f21121733f 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
+}