kexec-tools/kdump-lib-initramfs.sh
Kairui Song e5ccb87ef6 Don's try to restart dracut-initqueue if it's already there
Resolves: bz1901024
Upstream: Fedora
Conflict: None

commit 108258139a
Author: Kairui Song <kasong@redhat.com>
Date:   Mon Apr 26 17:09:55 2021 +0800

    Don's try to restart dracut-initqueue if it's already there

    kdump's dump_to_rootfs will try to start initqueue unconditionally.
    dump_to_rootfs will run after systemd isolate to emergency
    target, so this is currently accetable.

    But there is a problem when initqueue starts the emergency action
    because of initqueue timeout. dump_to_rootfs will start initqueue and
    lead to timeout again.

    So following patch will remove the previous isolation wrapper, and
    detect the service status here. Previous isolation makes the detection
    impossible. Now this detection will be valid and helpful to prevent
    double timeout or hang.

    Signed-off-by: Kairui Song <kasong@redhat.com>
    Acked-by: Coiby Xu <coxu@redhat.com>

Signed-off-by: Kairui Song <kasong@redhat.com>
2021-06-04 14:27:58 +08:00

257 lines
6.9 KiB
Bash
Executable File

# These variables and functions are useful in 2nd kernel
. /lib/kdump-lib.sh
. /lib/kdump-logger.sh
KDUMP_PATH="/var/crash"
KDUMP_LOG_FILE="/run/initramfs/kexec-dmesg.log"
CORE_COLLECTOR=""
DEFAULT_CORE_COLLECTOR="makedumpfile -l --message-level 7 -d 31"
DMESG_COLLECTOR="/sbin/vmcore-dmesg"
FAILURE_ACTION="systemctl reboot -f"
DATEDIR=`date +%Y-%m-%d-%T`
HOST_IP='127.0.0.1'
DUMP_INSTRUCTION=""
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
KDUMP_SCRIPT_DIR="/kdumpscripts"
DD_BLKSIZE=512
FINAL_ACTION="systemctl reboot -f"
KDUMP_CONF="/etc/kdump.conf"
KDUMP_PRE=""
KDUMP_POST=""
NEWROOT="/sysroot"
OPALCORE="/sys/firmware/opal/mpipl/core"
#initiate the kdump logger
dlog_init
if [ $? -ne 0 ]; then
echo "failed to initiate the kdump logger."
exit 1
fi
get_kdump_confs()
{
local config_opt config_val
while read config_opt config_val;
do
# remove inline comments after the end of a directive.
case "$config_opt" in
path)
KDUMP_PATH="$config_val"
;;
core_collector)
[ -n "$config_val" ] && CORE_COLLECTOR="$config_val"
;;
sshkey)
if [ -f "$config_val" ]; then
SSH_KEY_LOCATION=$config_val
fi
;;
kdump_pre)
KDUMP_PRE="$config_val"
;;
kdump_post)
KDUMP_POST="$config_val"
;;
fence_kdump_args)
FENCE_KDUMP_ARGS="$config_val"
;;
fence_kdump_nodes)
FENCE_KDUMP_NODES="$config_val"
;;
failure_action|default)
case $config_val in
shell)
FAILURE_ACTION="kdump_emergency_shell"
;;
reboot)
FAILURE_ACTION="systemctl reboot -f && exit"
;;
halt)
FAILURE_ACTION="halt && exit"
;;
poweroff)
FAILURE_ACTION="systemctl poweroff -f && exit"
;;
dump_to_rootfs)
FAILURE_ACTION="dump_to_rootfs"
;;
esac
;;
final_action)
case $config_val in
reboot)
FINAL_ACTION="systemctl reboot -f"
;;
halt)
FINAL_ACTION="halt"
;;
poweroff)
FINAL_ACTION="systemctl poweroff -f"
;;
esac
;;
esac
done <<< "$(read_strip_comments $KDUMP_CONF)"
if [ -z "$CORE_COLLECTOR" ]; then
CORE_COLLECTOR="$DEFAULT_CORE_COLLECTOR"
if is_ssh_dump_target || is_raw_dump_target; then
CORE_COLLECTOR="$CORE_COLLECTOR -F"
fi
fi
}
# store the kexec kernel log to a file.
save_log()
{
dmesg -T > $KDUMP_LOG_FILE
if command -v journalctl > /dev/null; then
journalctl -ab >> $KDUMP_LOG_FILE
fi
chmod 600 $KDUMP_LOG_FILE
}
# dump_fs <mount point>
dump_fs()
{
local _exitcode
local _mp=$1
local _op=$(get_mount_info OPTIONS target $_mp -f)
ddebug "dump_fs _mp=$_mp _opts=$_op"
if ! is_mounted "$_mp"; then
dinfo "dump path \"$_mp\" is not mounted, trying to mount..."
mount --target $_mp
if [ $? -ne 0 ]; then
derror "failed to dump to \"$_mp\", it's not a mount point!"
return 1
fi
fi
# Remove -F in makedumpfile case. We don't want a flat format dump here.
[[ $CORE_COLLECTOR = *makedumpfile* ]] && CORE_COLLECTOR=`echo $CORE_COLLECTOR | sed -e "s/-F//g"`
local _dump_path=$(echo "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/" | tr -s /)
dinfo "saving to $_dump_path"
# Only remount to read-write mode if the dump target is mounted read-only.
if [[ "$_op" = "ro"* ]]; then
dinfo "Remounting the dump target in rw mode."
mount -o remount,rw $_mp || return 1
fi
mkdir -p $_dump_path || return 1
save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_dump_path"
save_opalcore_fs "$_dump_path"
dinfo "saving vmcore"
$CORE_COLLECTOR /proc/vmcore $_dump_path/vmcore-incomplete
_exitcode=$?
if [ $_exitcode -eq 0 ]; then
mv $_dump_path/vmcore-incomplete $_dump_path/vmcore
sync
dinfo "saving vmcore complete"
else
derror "saving vmcore failed, _exitcode:$_exitcode"
fi
dinfo "saving the $KDUMP_LOG_FILE to $_dump_path/"
save_log
mv $KDUMP_LOG_FILE $_dump_path/
if [ $_exitcode -ne 0 ]; then
return 1
fi
# improper kernel cmdline can cause the failure of echo, we can ignore this kind of failure
return 0
}
save_vmcore_dmesg_fs() {
local _dmesg_collector=$1
local _path=$2
dinfo "saving vmcore-dmesg.txt to ${_path}"
$_dmesg_collector /proc/vmcore > ${_path}/vmcore-dmesg-incomplete.txt
_exitcode=$?
if [ $_exitcode -eq 0 ]; then
mv ${_path}/vmcore-dmesg-incomplete.txt ${_path}/vmcore-dmesg.txt
chmod 600 ${_path}/vmcore-dmesg.txt
# Make sure file is on disk. There have been instances where later
# saving vmcore failed and system rebooted without sync and there
# was no vmcore-dmesg.txt available.
sync
dinfo "saving vmcore-dmesg.txt complete"
else
if [ -f ${_path}/vmcore-dmesg-incomplete.txt ]; then
chmod 600 ${_path}/vmcore-dmesg-incomplete.txt
fi
derror "saving vmcore-dmesg.txt failed"
fi
}
save_opalcore_fs() {
local _path=$1
if [ ! -f $OPALCORE ]; then
# Check if we are on an old kernel that uses a different path
if [ -f /sys/firmware/opal/core ]; then
OPALCORE="/sys/firmware/opal/core"
else
return 0
fi
fi
dinfo "saving opalcore:$OPALCORE to ${_path}/opalcore"
cp $OPALCORE ${_path}/opalcore
if [ $? -ne 0 ]; then
derror "saving opalcore failed"
return 1
fi
sync
dinfo "saving opalcore complete"
return 0
}
dump_to_rootfs()
{
if [[ $(systemctl status dracut-initqueue | sed -n "s/^\s*Active: \(\S*\)\s.*$/\1/p") == "inactive" ]]; then
dinfo "Trying to bring up initqueue for rootfs mount"
systemctl start dracut-initqueue
fi
dinfo "Waiting for rootfs mount, will timeout after 90 seconds"
systemctl start sysroot.mount
ddebug "NEWROOT=$NEWROOT"
dump_fs $NEWROOT
}
kdump_emergency_shell()
{
echo "PS1=\"kdump:\\\${PWD}# \"" >/etc/profile
ddebug "Switching to dracut emergency..."
/bin/dracut-emergency
rm -f /etc/profile
}
do_failure_action()
{
dinfo "Executing failure action $FAILURE_ACTION"
eval $FAILURE_ACTION
}
do_final_action()
{
dinfo "Executing final action $FINAL_ACTION"
eval $FINAL_ACTION
}