b1339c3b8a
POSIX doesn't support keyword `local`, so this commit reduced variable usage.
Heredoc ("<<<") operation is also not supported, so kdump.conf is now pre-parse
into a temp file. Also fixes many POSIX syntax errors.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
582 lines
15 KiB
Bash
Executable File
582 lines
15 KiB
Bash
Executable File
#!/bin/sh
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#
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# The main kdump routine in capture kernel
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#
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. /lib/dracut-lib.sh
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. /lib/kdump-logger.sh
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. /lib/kdump-lib-initramfs.sh
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#initiate the kdump logger
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if ! dlog_init; then
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echo "failed to initiate the kdump logger."
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exit 1
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fi
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KDUMP_PATH="/var/crash"
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KDUMP_LOG_FILE="/run/initramfs/kexec-dmesg.log"
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CORE_COLLECTOR=""
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DEFAULT_CORE_COLLECTOR="makedumpfile -l --message-level 7 -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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DD_BLKSIZE=512
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FINAL_ACTION="systemctl reboot -f"
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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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KDUMP_CONF_PARSED="/tmp/kdump.conf.$$"
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# POSIX doesn't have pipefail, only apply when using bash
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# shellcheck disable=SC3040
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[ -n "$BASH" ] && set -o pipefail
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DUMP_RETVAL=0
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kdump_read_conf > $KDUMP_CONF_PARSED
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get_kdump_confs()
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{
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while read -r config_opt config_val; do
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# remove inline comments after the end of a directive.
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case "$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 $config_val in
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reboot)
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FINAL_ACTION="systemctl reboot -f"
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;;
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halt)
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FINAL_ACTION="halt"
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;;
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poweroff)
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FINAL_ACTION="systemctl poweroff -f"
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;;
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esac
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;;
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esac
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done < "$KDUMP_CONF_PARSED"
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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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# store the kexec kernel log to a file.
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save_log()
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{
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dmesg -T > $KDUMP_LOG_FILE
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if command -v journalctl > /dev/null; then
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journalctl -ab >> $KDUMP_LOG_FILE
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fi
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chmod 600 $KDUMP_LOG_FILE
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}
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# $1: dump path, must be a mount point
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dump_fs()
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{
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ddebug "dump_fs _mp=$1"
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if ! is_mounted "$1"; then
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dinfo "dump path '$1' is not mounted, trying to mount..."
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if ! mount --target "$1"; then
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derror "failed to dump to '$1', it's not a mount point!"
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return 1
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fi
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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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case $CORE_COLLECTOR in
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*makedumpfile* )
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CORE_COLLECTOR=$(echo "$CORE_COLLECTOR" | sed -e "s/-F//g")
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;;
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esac
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_dump_fs_path=$(echo "$1/$KDUMP_PATH/$HOST_IP-$DATEDIR/" | tr -s /)
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dinfo "saving to $_dump_fs_path"
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# Only remount to read-write mode if the dump target is mounted read-only.
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_dump_mnt_op=$(get_mount_info OPTIONS target "$1" -f)
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case $_dump_mnt_op in
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ro* )
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dinfo "Remounting the dump target in rw mode."
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mount -o remount,rw "$1" || return 1
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;;
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esac
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mkdir -p "$_dump_fs_path" || return 1
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save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_dump_fs_path"
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save_opalcore_fs "$_dump_fs_path"
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dinfo "saving vmcore"
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$CORE_COLLECTOR /proc/vmcore "$_dump_fs_path/vmcore-incomplete"
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_dump_exitcode=$?
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if [ $_dump_exitcode -eq 0 ]; then
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mv "$_dump_fs_path/vmcore-incomplete" "$_dump_fs_path/vmcore"
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sync
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dinfo "saving vmcore complete"
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else
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derror "saving vmcore failed, exitcode:$_dump_exitcode"
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fi
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dinfo "saving the $KDUMP_LOG_FILE to $_dump_fs_path/"
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save_log
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mv "$KDUMP_LOG_FILE" "$_dump_fs_path/"
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if [ $_dump_exitcode -ne 0 ]; then
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return 1
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fi
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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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# $1: dmesg collector
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# $2: dump path
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save_vmcore_dmesg_fs() {
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dinfo "saving vmcore-dmesg.txt to $2"
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if $1 /proc/vmcore > "$2/vmcore-dmesg-incomplete.txt"; then
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mv "$2/vmcore-dmesg-incomplete.txt" "$2/vmcore-dmesg.txt"
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chmod 600 "$2/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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dinfo "saving vmcore-dmesg.txt complete"
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else
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if [ -f "$2/vmcore-dmesg-incomplete.txt" ]; then
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chmod 600 "$2/vmcore-dmesg-incomplete.txt"
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fi
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derror "saving vmcore-dmesg.txt failed"
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fi
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}
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# $1: dump path
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save_opalcore_fs() {
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if [ ! -f $OPALCORE ]; then
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# Check if we are on an old kernel that uses a different path
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if [ -f /sys/firmware/opal/core ]; then
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OPALCORE="/sys/firmware/opal/core"
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else
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return 0
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fi
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fi
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dinfo "saving opalcore:$OPALCORE to $1/opalcore"
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if ! cp $OPALCORE "$1/opalcore"; then
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derror "saving opalcore failed"
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return 1
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fi
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sync
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dinfo "saving opalcore complete"
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return 0
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}
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dump_to_rootfs()
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{
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if [ "$(systemctl status dracut-initqueue | sed -n "s/^\s*Active: \(\S*\)\s.*$/\1/p")" = "inactive" ]; then
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dinfo "Trying to bring up initqueue for rootfs mount"
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systemctl start dracut-initqueue
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fi
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dinfo "Clean up dead systemd services"
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systemctl cancel
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dinfo "Waiting for rootfs mount, will timeout after 90 seconds"
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systemctl start --no-block sysroot.mount
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_loop=0
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while [ $_loop -lt 90 ] && ! is_mounted /sysroot; do
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sleep 1
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_loop=$((_loop + 1))
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done
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if ! is_mounted /sysroot; then
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derror "Failed to mount rootfs"
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return
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fi
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ddebug "NEWROOT=$NEWROOT"
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dump_fs $NEWROOT
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}
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kdump_emergency_shell()
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{
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ddebug "Switching to kdump emergency shell..."
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[ -f /etc/profile ] && . /etc/profile
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export PS1='kdump:${PWD}# '
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. /lib/dracut-lib.sh
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if [ -f /dracut-state.sh ]; then
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. /dracut-state.sh 2>/dev/null
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fi
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source_conf /etc/conf.d
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type plymouth >/dev/null 2>&1 && plymouth quit
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source_hook "emergency"
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while read -r _tty rest; do
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(
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echo
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echo
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echo 'Entering kdump emergency mode.'
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echo 'Type "journalctl" to view system logs.'
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echo 'Type "rdsosreport" to generate a sosreport, you can then'
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echo 'save it elsewhere and attach it to a bug report.'
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echo
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echo
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) > "/dev/$_tty"
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done < /proc/consoles
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sh -i -l
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/bin/rm -f -- /.console_lock
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}
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do_failure_action()
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{
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dinfo "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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dinfo "Executing final action $FINAL_ACTION"
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eval $FINAL_ACTION
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}
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do_dump()
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{
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eval $DUMP_INSTRUCTION
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "saving vmcore failed"
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fi
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return $_ret
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}
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do_kdump_pre()
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{
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if [ -n "$KDUMP_PRE" ]; then
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"$KDUMP_PRE"
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "$KDUMP_PRE exited with $_ret status"
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return $_ret
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fi
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fi
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# if any script fails, it just raises warning and continues
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if [ -d /etc/kdump/pre.d ]; then
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for file in /etc/kdump/pre.d/*; do
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"$file"
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "$file exited with $_ret status"
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fi
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done
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fi
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return 0
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}
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do_kdump_post()
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{
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if [ -d /etc/kdump/post.d ]; then
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for file in /etc/kdump/post.d/*; do
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"$file" "$1"
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "$file exited with $_ret status"
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fi
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done
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fi
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if [ -n "$KDUMP_POST" ]; then
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"$KDUMP_POST" "$1"
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "$KDUMP_POST exited with $_ret status"
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fi
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fi
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}
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# $1: block target, eg. /dev/sda
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dump_raw()
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{
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[ -b "$1" ] || return 1
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dinfo "saving to raw disk $1"
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if ! echo "$CORE_COLLECTOR" | grep -q makedumpfile; then
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_src_size=$(stat --format %s /proc/vmcore)
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_src_size_mb=$((_src_size / 1048576))
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/kdumpscripts/monitor_dd_progress $_src_size_mb &
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fi
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dinfo "saving vmcore"
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$CORE_COLLECTOR /proc/vmcore | dd of="$1" bs=$DD_BLKSIZE >> /tmp/dd_progress_file 2>&1 || return 1
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sync
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dinfo "saving vmcore complete"
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return 0
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}
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# $1: ssh key file
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# $2: ssh address in <user>@<host> format
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dump_ssh()
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{
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_ret=0
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_ssh_opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes"
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_ssh_dir="$KDUMP_PATH/$HOST_IP-$DATEDIR"
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if is_ipv6_address "$2"; then
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_scp_address=${2%@*}@"[${2#*@}]"
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else
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_scp_address=$2
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fi
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dinfo "saving to $2:$_ssh_dir"
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cat /var/lib/random-seed > /dev/urandom
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ssh -q $_ssh_opt "$2" mkdir -p "$_ssh_dir" || return 1
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save_vmcore_dmesg_ssh "$DMESG_COLLECTOR" "$_ssh_dir" "$_ssh_opt" "$2"
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dinfo "saving vmcore"
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save_opalcore_ssh "$_ssh_dir" "$_ssh_opt" "$2" "$_scp_address"
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if [ "${CORE_COLLECTOR%%[[:blank:]]*}" = "scp" ]; then
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scp -q $_ssh_opt /proc/vmcore "$_scp_address:$_ssh_dir/vmcore-incomplete"
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_ret=$?
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_vmcore="vmcore"
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else
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$CORE_COLLECTOR /proc/vmcore | ssh $_ssh_opt "$2" "umask 0077 && dd bs=512 of='$_ssh_dir/vmcore-incomplete'"
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_ret=$?
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_vmcore="vmcore.flat"
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fi
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if [ $_ret -eq 0 ]; then
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ssh $_ssh_opt "$2" "mv '$_ssh_dir/vmcore-incomplete' '$_ssh_dir/$_vmcore'"
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_ret=$?
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if [ $_ret -ne 0 ]; then
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derror "moving vmcore failed, exitcode:$_ret"
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else
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dinfo "saving vmcore complete"
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fi
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else
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derror "saving vmcore failed, exitcode:$_ret"
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fi
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dinfo "saving the $KDUMP_LOG_FILE to $2:$_ssh_dir/"
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save_log
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if ! scp -q $_ssh_opt $KDUMP_LOG_FILE "$_scp_address:$_ssh_dir/"; then
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derror "saving log file failed, _exitcode:$_ret"
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fi
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return $_ret
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}
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# $1: dump path
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# $2: ssh opts
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# $3: ssh address in <user>@<host> format
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# $4: scp address, similar with ssh address but IPv6 addresses are quoted
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save_opalcore_ssh() {
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if [ ! -f $OPALCORE ]; then
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# Check if we are on an old kernel that uses a different path
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if [ -f /sys/firmware/opal/core ]; then
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OPALCORE="/sys/firmware/opal/core"
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else
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return 0
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fi
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fi
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dinfo "saving opalcore:$OPALCORE to $3:$1"
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if ! scp $2 $OPALCORE "$4:$1/opalcore-incomplete"; then
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derror "saving opalcore failed"
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return 1
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fi
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ssh $2 "$3" mv "$1/opalcore-incomplete" "$1/opalcore"
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dinfo "saving opalcore complete"
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return 0
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}
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# $1: dmesg collector
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# $2: dump path
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# $3: ssh opts
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# $4: ssh address in <user>@<host> format
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save_vmcore_dmesg_ssh() {
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dinfo "saving vmcore-dmesg.txt to $4:$2"
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if $1 /proc/vmcore | ssh $3 "$4" "umask 0077 && dd of='$2/vmcore-dmesg-incomplete.txt'"; then
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ssh -q $3 "$4" mv "$2/vmcore-dmesg-incomplete.txt" "$2/vmcore-dmesg.txt"
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dinfo "saving vmcore-dmesg.txt complete"
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else
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derror "saving vmcore-dmesg.txt failed"
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fi
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}
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get_host_ip()
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{
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if is_nfs_dump_target || is_ssh_dump_target
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then
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kdumpnic=$(getarg kdumpnic=)
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if [ -z "$kdumpnic" ]; then
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derror "failed to get kdumpnic!"
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return 1
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fi
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if ! kdumphost=$(ip addr show dev "$kdumpnic" | grep '[ ]*inet'); then
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derror "wrong kdumpnic: $kdumpnic"
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return 1
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fi
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kdumphost=$(echo "$kdumphost" | head -n 1 | awk '{print $2}')
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kdumphost="${kdumphost%%/*}"
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if [ -z "$kdumphost" ]; then
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derror "wrong kdumpnic: $kdumpnic"
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return 1
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fi
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HOST_IP=$kdumphost
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fi
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return 0
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}
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read_kdump_confs()
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{
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if [ ! -f "$KDUMP_CONFIG_FILE" ]; then
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derror "$KDUMP_CONFIG_FILE not found"
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return
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fi
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|
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get_kdump_confs
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|
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# rescan for add code for dump target
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while read -r 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 "$config_val")
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if [ -n "$config_val" ]; then
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config_val=$(get_mntpoint_from_target "$config_val")
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DUMP_INSTRUCTION="dump_fs $config_val"
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fi
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;;
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ext[234]|xfs|btrfs|minix|nfs)
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config_val=$(get_mntpoint_from_target "$config_val")
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DUMP_INSTRUCTION="dump_fs $config_val"
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;;
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raw)
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DUMP_INSTRUCTION="dump_raw $config_val"
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;;
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ssh)
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DUMP_INSTRUCTION="dump_ssh $SSH_KEY_LOCATION $config_val"
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;;
|
|
esac
|
|
done < "$KDUMP_CONF_PARSED"
|
|
}
|
|
|
|
fence_kdump_notify()
|
|
{
|
|
if [ -n "$FENCE_KDUMP_NODES" ]; then
|
|
# shellcheck disable=SC2086
|
|
$FENCE_KDUMP_SEND $FENCE_KDUMP_ARGS $FENCE_KDUMP_NODES &
|
|
fi
|
|
}
|
|
|
|
if [ "$1" = "--error-handler" ]; then
|
|
get_kdump_confs
|
|
do_failure_action
|
|
do_final_action
|
|
|
|
exit $?
|
|
fi
|
|
|
|
# continue here only if we have to save dump.
|
|
if [ -f /etc/fadump.initramfs ] && [ ! -f /proc/device-tree/rtas/ibm,kernel-dump ] && [ ! -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
|
|
exit 0
|
|
fi
|
|
|
|
read_kdump_confs
|
|
fence_kdump_notify
|
|
|
|
if ! get_host_ip; then
|
|
derror "get_host_ip exited with non-zero status!"
|
|
exit 1
|
|
fi
|
|
|
|
if [ -z "$DUMP_INSTRUCTION" ]; then
|
|
DUMP_INSTRUCTION="dump_fs $NEWROOT"
|
|
fi
|
|
|
|
if ! do_kdump_pre; then
|
|
derror "kdump_pre script exited with non-zero status!"
|
|
do_final_action
|
|
# During systemd service to reboot the machine, stop this shell script running
|
|
exit 1
|
|
fi
|
|
make_trace_mem "kdump saving vmcore" '1:shortmem' '2+:mem' '3+:slab'
|
|
do_dump
|
|
DUMP_RETVAL=$?
|
|
|
|
if ! do_kdump_post $DUMP_RETVAL; then
|
|
derror "kdump_post script exited with non-zero status!"
|
|
fi
|
|
|
|
if [ $DUMP_RETVAL -ne 0 ]; then
|
|
exit 1
|
|
fi
|
|
|
|
do_final_action
|