diff options
Diffstat (limited to 'yocto-poky/meta/recipes-kernel/kexec/kexec-tools/kdump')
-rwxr-xr-x | yocto-poky/meta/recipes-kernel/kexec/kexec-tools/kdump | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/yocto-poky/meta/recipes-kernel/kexec/kexec-tools/kdump b/yocto-poky/meta/recipes-kernel/kexec/kexec-tools/kdump new file mode 100755 index 000000000..3fb133fb3 --- /dev/null +++ b/yocto-poky/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 $? |