mirror of https://github.com/hak5/openwrt.git
183 lines
3.4 KiB
Bash
Executable File
183 lines
3.4 KiB
Bash
Executable File
#!/bin/sh /etc/rc.common
|
|
|
|
START=41
|
|
STOP=98
|
|
|
|
EXTRA_COMMANDS="status"
|
|
EXTRA_HELP=" status Print crashkernel status"
|
|
|
|
verify_kdump() {
|
|
local cfg="$1"
|
|
local enabled
|
|
local path
|
|
local save_vmcore
|
|
local save_dmesg
|
|
|
|
config_get_bool enabled "$cfg" enabled 1
|
|
config_get_bool save_dmesg "$cfg" save_dmesg 1
|
|
config_get_bool save_vmcore "$cfg" save_vmcore 0
|
|
|
|
[ "$enabled" -gt 0 ] || return 2
|
|
|
|
[ "$save_dmesg" -gt 0 ] || [ "$save_vmcore" -gt 0 ] || return 2
|
|
|
|
config_get path "$cfg" path "/"
|
|
|
|
[ -d "$path" ] || mkdir -p "$path" 2>/dev/null || return 1
|
|
}
|
|
|
|
run_kdump() {
|
|
local cfg="$1"
|
|
local enabled
|
|
local path
|
|
local save_vmcore
|
|
local save_dmesg
|
|
|
|
config_get_bool enabled "$cfg" enabled 1
|
|
[ "$enabled" -gt 0 ] || return
|
|
|
|
config_get_bool save_dmesg "$cfg" save_dmesg 1
|
|
config_get_bool save_vmcore "$cfg" save_vmcore 0
|
|
config_get path "$cfg" path "/"
|
|
|
|
timestamp=$(date "+%Y%m%dT%H%M%S")
|
|
|
|
if [ "$save_vmcore" -eq 1 ]; then
|
|
# would like 'sparse' but busybox doesn't support it
|
|
dd if=/proc/vmcore of="$path/vmcore-$timestamp" conv=fsync bs=1M
|
|
fi
|
|
|
|
if [ "$save_dmesg" -eq 1 ]; then
|
|
vmcore-dmesg /proc/vmcore > "$path/dmesg-$timestamp"
|
|
fi
|
|
|
|
sync
|
|
reboot -f
|
|
}
|
|
|
|
find_kernel() {
|
|
. /lib/functions.sh
|
|
local kernel
|
|
|
|
kernel="$BOOT_IMAGE"
|
|
if [ -r "$kernel" ]; then
|
|
echo $kernel
|
|
return 0
|
|
fi
|
|
|
|
kernel="$(find_mtd_part kernel)"
|
|
if [ -r "$kernel" ]; then
|
|
echo $kernel
|
|
return 0
|
|
fi
|
|
|
|
for voldir in /sys/class/ubi/ubi*_*; do
|
|
[ ! -e "$voldir" ] && continue
|
|
if [ "$(cat "${voldir}/name")" = "kernel" ]; then
|
|
kernel="/dev/$(basename "$voldir")"
|
|
echo $kernel
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 1
|
|
}
|
|
|
|
load_crashkernel() {
|
|
local append_cmdline
|
|
local kernel
|
|
|
|
kernel="$(find_kernel)"
|
|
[ $? -gt 0 ] && return 1
|
|
|
|
case "$(uname -m)" in
|
|
i?86|x86_64)
|
|
grep -q "crashkernel=" /proc/cmdline || return 1
|
|
append_cmdline="1 irqpoll reset_devices maxcpus=1"
|
|
;;
|
|
arm*)
|
|
append_cmdline="1 maxcpus=1 reset_devices"
|
|
;;
|
|
esac
|
|
kexec -p "$kernel" --reuse-cmdline --append="$append_cmdline"
|
|
return $?
|
|
}
|
|
|
|
start() {
|
|
local retval
|
|
|
|
if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
|
|
return 1
|
|
fi
|
|
|
|
if [ -e /proc/vmcore ]; then
|
|
config_load kdump
|
|
config_foreach run_kdump kdump
|
|
else
|
|
config_load kdump
|
|
config_foreach verify_kdump kdump
|
|
retval=$?
|
|
[ $retval = 1 ] && return 1
|
|
[ $retval = 0 ] && load_crashkernel
|
|
return $?
|
|
fi
|
|
}
|
|
|
|
stop() {
|
|
[ "$(cat /sys/kernel/kexec_crash_loaded)" = "1" ] || return
|
|
|
|
if [ -e "$BOOT_IMAGE" ]; then
|
|
kexec -p -u "$BOOT_IMAGE"
|
|
fi
|
|
}
|
|
|
|
status() {
|
|
local retval kernel
|
|
|
|
if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
|
|
echo "crashdump not supported by kernel"
|
|
return
|
|
fi
|
|
|
|
if [ $(cat /sys/kernel/kexec_crash_size) -eq 0 ]; then
|
|
echo "memory for crashdump kernel not reserved!"
|
|
echo "check crashkernel= kernel cmdline parameter"
|
|
echo "(a reboot is required after installing kdump)"
|
|
return
|
|
fi
|
|
|
|
kernel="$(find_kernel)"
|
|
if [ $? -gt 0 ]; then
|
|
echo "cannot find kernel image"
|
|
return
|
|
else
|
|
echo "using kernel image $kernel"
|
|
fi
|
|
|
|
echo -n "kdump configuration is "
|
|
config_load kdump
|
|
retval=$?
|
|
if [ $retval = 0 ]; then
|
|
if [ "$(config_foreach echo kdump)" ]; then
|
|
config_foreach verify_kdump kdump
|
|
retval=$?
|
|
else
|
|
retval=1
|
|
fi
|
|
fi
|
|
|
|
if [ $retval = 0 ]; then
|
|
echo "valid"
|
|
elif [ $retval = 2 ]; then
|
|
echo "disabled"
|
|
else
|
|
echo "BROKEN"
|
|
fi
|
|
|
|
echo -n "kexec crash kernel "
|
|
if [ "$(cat /sys/kernel/kexec_crash_loaded)" = "0" ]; then
|
|
echo -n "not "
|
|
fi
|
|
echo "loaded"
|
|
}
|