Your Name
59 lines
2.1 KiB
Bash
59 lines
2.1 KiB
Bash
#!/bin/bash
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# get fan state by d-bus command
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function get_fan_state() {
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get_property_path='xyz.openbmc_project.Sensor.Threshold.Critical CriticalAlarmLow'
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fan_state="$(busctl get-property "$1" "$2" "$get_property_path" | awk '{print $2}')"
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echo "$fan_state"
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}
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# set fan pwm by d-bus command
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function set_fan_value() {
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set_property_path='xyz.openbmc_project.Control.FanPwm'
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busctl set-property "$1" "$2" $set_property_path Target t 255
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}
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fan_tach_path=( '/xyz/openbmc_project/sensors/fan_tach/Fan0_0_RPM'
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'/xyz/openbmc_project/sensors/fan_tach/Fan0_1_RPM'
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'/xyz/openbmc_project/sensors/fan_tach/Fan1_0_RPM'
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'/xyz/openbmc_project/sensors/fan_tach/Fan1_1_RPM'
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'/xyz/openbmc_project/sensors/fan_tach/Fan2_0_RPM'
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'/xyz/openbmc_project/sensors/fan_tach/Fan2_1_RPM'
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)
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check_fail_flag=0
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current_fan_state=()
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while true; do
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hwmon_path="$(mapper get-service "${fan_tach_path[0]}")"
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for i in "${!fan_tach_path[@]}";
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do
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current_fan_state[i%2]=$(get_fan_state "$hwmon_path" "${fan_tach_path[$i]}")
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#Compare state of dual rotors with CriticalAlarmLow to check if fan fail
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if [ ${#current_fan_state[@]} -eq 2 ];then
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if [ "${current_fan_state[0]}" == "true" ] && \
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[ "${current_fan_state[1]}" == "true" ] ;then
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if [ $check_fail_flag -eq 0 ];then
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systemctl stop phosphor-pid-control
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for j in "${!fan_tach_path[@]}";
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do
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#If fan fail is detect, set other fan rpm to pwm 255.
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set_fan_value "$hwmon_path" "${fan_tach_path[$j]}"
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check_fail_flag=1
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done
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fi
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current_fan_state=()
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break
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fi
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current_fan_state=()
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fi
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#fans are going to normal.
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if [ "$i" -eq $((${#fan_tach_path[@]}-1)) ] && [ $check_fail_flag -eq 1 ]; then
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check_fail_flag=0
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systemctl restart phosphor-pid-control
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fi
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done
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sleep 2
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done
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