0624148414
Use is_mounted helper instaed of calling findmnt directly or checking if "mount" value is empty. If findmnt looks for fstab as well, some non mounted entry will also return value. Required to support non-mounted target. Signed-off-by: Kairui Song <kasong@redhat.com> Acked-by: Pingfan Liu <piliu@redhat.com>
274 lines
7.6 KiB
Bash
Executable File
274 lines
7.6 KiB
Bash
Executable File
# These variables and functions are useful in 2nd kernel
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. /lib/kdump-lib.sh
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KDUMP_PATH="/var/crash"
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CORE_COLLECTOR=""
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DEFAULT_CORE_COLLECTOR="makedumpfile -l --message-level 1 -d 31"
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DMESG_COLLECTOR="/sbin/vmcore-dmesg"
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FAILURE_ACTION="systemctl reboot -f"
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DATEDIR=`date +%Y-%m-%d-%T`
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HOST_IP='127.0.0.1'
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DUMP_INSTRUCTION=""
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SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
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KDUMP_SCRIPT_DIR="/kdumpscripts"
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DD_BLKSIZE=512
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FINAL_ACTION="systemctl reboot -f"
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KDUMP_CONF="/etc/kdump.conf"
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KDUMP_PRE=""
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KDUMP_POST=""
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NEWROOT="/sysroot"
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OPALCORE="/sys/firmware/opal/mpipl/core"
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get_kdump_confs()
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{
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local config_opt config_val
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while read config_opt config_val;
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do
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# remove inline comments after the end of a directive.
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case "$config_opt" in
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path)
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KDUMP_PATH="$config_val"
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;;
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core_collector)
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[ -n "$config_val" ] && CORE_COLLECTOR="$config_val"
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;;
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sshkey)
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if [ -f "$config_val" ]; then
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SSH_KEY_LOCATION=$config_val
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fi
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;;
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kdump_pre)
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KDUMP_PRE="$config_val"
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;;
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kdump_post)
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KDUMP_POST="$config_val"
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;;
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fence_kdump_args)
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FENCE_KDUMP_ARGS="$config_val"
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;;
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fence_kdump_nodes)
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FENCE_KDUMP_NODES="$config_val"
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;;
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failure_action|default)
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case $config_val in
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shell)
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FAILURE_ACTION="kdump_emergency_shell"
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;;
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reboot)
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FAILURE_ACTION="systemctl reboot -f && exit"
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;;
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halt)
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FAILURE_ACTION="halt && exit"
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;;
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poweroff)
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FAILURE_ACTION="systemctl poweroff -f && exit"
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;;
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dump_to_rootfs)
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FAILURE_ACTION="dump_to_rootfs"
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;;
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esac
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;;
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final_action)
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case $config_val in
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reboot)
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FINAL_ACTION="systemctl reboot -f"
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;;
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halt)
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FINAL_ACTION="halt"
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;;
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poweroff)
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FINAL_ACTION="systemctl poweroff -f"
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;;
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esac
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;;
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esac
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done <<< "$(read_strip_comments $KDUMP_CONF)"
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if [ -z "$CORE_COLLECTOR" ]; then
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CORE_COLLECTOR="$DEFAULT_CORE_COLLECTOR"
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if is_ssh_dump_target || is_raw_dump_target; then
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CORE_COLLECTOR="$CORE_COLLECTOR -F"
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fi
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fi
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}
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# dump_fs <mount point| device>
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dump_fs()
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{
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local _dev=$(findmnt -k -f -n -r -o SOURCE $1)
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local _mp=$(findmnt -k -f -n -r -o TARGET $1)
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local _op=$(findmnt -k -f -n -r -o OPTIONS $1)
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if ! is_mounted "$_mp"; then
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_dev=$(findmnt -s -f -n -r -o SOURCE $1)
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_mp=$(findmnt -s -f -n -r -o TARGET $1)
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_op=$(findmnt -s -f -n -r -o OPTIONS $1)
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if [ -n "$_dev" ] && [ -n "$_mp" ]; then
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echo "kdump: dump target $_dev is not mounted, trying to mount..."
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mkdir -p $_mp
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mount -o $_op $_dev $_mp
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if [ $? -ne 0 ]; then
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echo "kdump: mounting failed (mount point: $_mp, option: $_op)"
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return 1
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fi
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else
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echo "kdump: error: Dump target $_dev is not usable"
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fi
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else
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echo "kdump: dump target is $_dev"
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fi
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# Remove -F in makedumpfile case. We don't want a flat format dump here.
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[[ $CORE_COLLECTOR = *makedumpfile* ]] && CORE_COLLECTOR=`echo $CORE_COLLECTOR | sed -e "s/-F//g"`
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local _dump_path=$(echo "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/" | tr -s /)
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echo "kdump: saving to $_dump_path"
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# Only remount to read-write mode if the dump target is mounted read-only.
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if [[ "$_op" = "ro"* ]]; then
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echo "kdump: Mounting Dump target $_dev in rw mode."
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mount -o remount,rw $_dev $_mp || return 1
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fi
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mkdir -p $_dump_path || return 1
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save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_dump_path"
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save_opalcore_fs "$_dump_path"
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echo "kdump: saving vmcore"
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$CORE_COLLECTOR /proc/vmcore $_dump_path/vmcore-incomplete || return 1
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mv $_dump_path/vmcore-incomplete $_dump_path/vmcore
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sync
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echo "kdump: saving vmcore complete"
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# improper kernel cmdline can cause the failure of echo, we can ignore this kind of failure
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return 0
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}
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save_vmcore_dmesg_fs() {
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local _dmesg_collector=$1
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local _path=$2
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echo "kdump: saving vmcore-dmesg.txt"
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$_dmesg_collector /proc/vmcore > ${_path}/vmcore-dmesg-incomplete.txt
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_exitcode=$?
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if [ $_exitcode -eq 0 ]; then
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mv ${_path}/vmcore-dmesg-incomplete.txt ${_path}/vmcore-dmesg.txt
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# Make sure file is on disk. There have been instances where later
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# saving vmcore failed and system rebooted without sync and there
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# was no vmcore-dmesg.txt available.
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sync
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echo "kdump: saving vmcore-dmesg.txt complete"
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else
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echo "kdump: saving vmcore-dmesg.txt failed"
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fi
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}
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save_opalcore_fs() {
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local _path=$1
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if [ ! -f $OPALCORE ]; then
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# Check if we are on an old kernel that uses a different path
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if [ -f /sys/firmware/opal/core ]; then
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OPALCORE="/sys/firmware/opal/core"
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else
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return 0
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fi
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fi
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echo "kdump: saving opalcore"
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cp $OPALCORE ${_path}/opalcore
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if [ $? -ne 0 ]; then
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echo "kdump: saving opalcore failed"
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return 1
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fi
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sync
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echo "kdump: saving opalcore complete"
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return 0
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}
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dump_to_rootfs()
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{
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echo "Kdump: trying to bring up rootfs device"
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systemctl start dracut-initqueue
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echo "Kdump: waiting for rootfs mount, will timeout after 90 seconds"
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systemctl start sysroot.mount
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dump_fs $NEWROOT
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}
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kdump_emergency_shell()
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{
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echo "PS1=\"kdump:\\\${PWD}# \"" >/etc/profile
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/bin/dracut-emergency
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rm -f /etc/profile
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}
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do_failure_action()
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{
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echo "Kdump: Executing failure action $FAILURE_ACTION"
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eval $FAILURE_ACTION
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}
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do_final_action()
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{
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eval $FINAL_ACTION
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}
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get_host_ip()
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{
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local _host
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if is_nfs_dump_target || is_ssh_dump_target
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then
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kdumpnic=$(getarg kdumpnic=)
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[ -z "$kdumpnic" ] && echo "kdump: failed to get kdumpnic!" && return 1
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_host=`ip addr show dev $kdumpnic|grep '[ ]*inet'`
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[ $? -ne 0 ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1
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_host=`echo $_host | head -n 1 | cut -d' ' -f2`
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_host="${_host%%/*}"
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[ -z "$_host" ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1
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HOST_IP=$_host
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fi
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return 0
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}
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read_kdump_conf()
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{
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if [ ! -f "$KDUMP_CONF" ]; then
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echo "kdump: $KDUMP_CONF not found"
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return
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fi
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get_kdump_confs
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# rescan for add code for dump target
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while read config_opt config_val;
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do
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# remove inline comments after the end of a directive.
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case "$config_opt" in
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dracut_args)
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config_val=$(get_dracut_args_target "$config_val")
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[ -n "$config_val" ] && add_dump_code "dump_fs $config_val"
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;;
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ext[234]|xfs|btrfs|minix|nfs)
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add_dump_code "dump_fs $config_val"
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;;
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raw)
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add_dump_code "dump_raw $config_val"
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;;
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ssh)
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add_dump_code "dump_ssh $SSH_KEY_LOCATION $config_val"
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;;
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esac
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done <<< "$(read_strip_comments $KDUMP_CONF)"
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}
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