522 lines
14 KiB
Bash
522 lines
14 KiB
Bash
#!/bin/bash --norc
|
|
# New mkdumprd
|
|
#
|
|
# Copyright 2011 Red Hat, Inc.
|
|
#
|
|
# Written by Cong Wang <amwang@redhat.com>
|
|
#
|
|
|
|
. /lib/kdump/kdump-lib.sh
|
|
export IN_KDUMP=1
|
|
|
|
conf_file="/etc/kdump.conf"
|
|
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
|
|
SAVE_PATH=$(grep ^path $conf_file| cut -d' ' -f2)
|
|
[ -z "$SAVE_PATH" ] && SAVE_PATH=$DEFAULT_PATH
|
|
# strip the duplicated "/"
|
|
SAVE_PATH=$(echo $SAVE_PATH | tr -s /)
|
|
|
|
is_wdt_addition_needed() {
|
|
local active
|
|
|
|
is_wdt_mod_omitted
|
|
[[ $? -eq 0 ]] && return 1
|
|
[[ -d /sys/class/watchdog/ ]] || return 1
|
|
for dir in /sys/class/watchdog/*; do
|
|
[[ -f "$dir/state" ]] || continue
|
|
active=$(< "$dir/state")
|
|
[[ "$active" = "active" ]] && return 0
|
|
done
|
|
return 1
|
|
}
|
|
|
|
WDTCFG=""
|
|
is_wdt_addition_needed
|
|
[[ $? -eq 0 ]] && WDTCFG="-a watchdog"
|
|
|
|
extra_modules=""
|
|
dracut_args=("--hostonly" "--hostonly-cmdline" "--hostonly-i18n" "--hostonly-mode" "strict" "-o" "plymouth dash resume ifcfg" $WDTCFG)
|
|
OVERRIDE_RESETTABLE=0
|
|
|
|
add_dracut_arg() {
|
|
local arg qarg is_quoted=0
|
|
while [ $# -gt 0 ];
|
|
do
|
|
arg="${1//\'/\"}"
|
|
#Handle quoted substring properly for passing it to dracut_args array.
|
|
if [ $is_quoted -eq 0 ]; then
|
|
if [[ "$arg" == "\"" ]] || [[ $arg != ${arg#\"} ]]; then
|
|
is_quoted=1
|
|
arg=${arg#\"}
|
|
fi
|
|
fi
|
|
if [ $is_quoted -eq 1 ]; then
|
|
qarg="$qarg $arg"
|
|
if [[ "$arg" == "\"" ]] || [[ $arg != ${arg%\"} ]]; then
|
|
is_quoted=0
|
|
arg=${qarg%\"}
|
|
qarg=""
|
|
else
|
|
shift
|
|
continue
|
|
fi
|
|
fi
|
|
dracut_args+=("$arg")
|
|
shift
|
|
done
|
|
}
|
|
|
|
add_dracut_module() {
|
|
add_dracut_arg "--add" "$1"
|
|
}
|
|
|
|
add_dracut_mount() {
|
|
add_dracut_arg "--mount" "$1"
|
|
}
|
|
|
|
add_dracut_sshkey() {
|
|
add_dracut_arg "--sshkey" "$1"
|
|
}
|
|
|
|
# Generic substring function. If $2 is in $1, return 0.
|
|
strstr() { [[ $1 =~ $2 ]]; }
|
|
|
|
# caller should ensure $1 is valid and mounted in 1st kernel
|
|
to_mount() {
|
|
local _dev=$1 _source _target _fstype _options _mntopts _pdev
|
|
|
|
_source=$(findmnt -k -f -n -r -o SOURCE $_dev)
|
|
_target=$(get_mntpoint_from_target $_dev)
|
|
# mount under /sysroot if dump to root disk or mount under
|
|
#/kdumproot/$_target in other cases in 2nd kernel. systemd
|
|
#will be in charge to umount it.
|
|
|
|
if [ "$_target" = "/" ];then
|
|
_target="/sysroot"
|
|
else
|
|
_target="/kdumproot/$_target"
|
|
fi
|
|
|
|
_fstype=$(findmnt -k -f -n -r -o FSTYPE $_dev)
|
|
[[ -e /etc/fstab ]] && _options=$(findmnt --fstab -f -n -r -o OPTIONS $_dev)
|
|
[ -z "$_options" ] && _options=$(findmnt -k -f -n -r -o OPTIONS $_dev)
|
|
# with 'noauto' in fstab nfs and non-root disk mount will fail in 2nd
|
|
# kernel, filter it out here.
|
|
_options=$(echo $_options | sed 's/\bnoauto\b//')
|
|
#mount fs target as rw in 2nd kernel
|
|
_options=$(echo $_options | sed 's/\bro\b/rw/')
|
|
|
|
_mntopts="$_target $_fstype $_options"
|
|
#for non-nfs _dev converting to use udev persistent name
|
|
if [ -b "$_source" ]; then
|
|
_pdev="$(kdump_get_persistent_dev $_source $_fstype)"
|
|
if [ $? -ne 0 ]; then
|
|
return 1
|
|
fi
|
|
|
|
else
|
|
_pdev=$_dev
|
|
fi
|
|
|
|
echo "$_pdev $_mntopts"
|
|
}
|
|
|
|
is_readonly_mount() {
|
|
local _mnt
|
|
_mnt=$(findmnt -k -f -n -r -o OPTIONS $1)
|
|
|
|
#fs/proc_namespace.c: show_mountinfo():
|
|
#seq_puts(m, mnt->mnt_flags & MNT_READONLY ? " ro" : " rw");
|
|
[[ "$_mnt" =~ ^ro ]]
|
|
}
|
|
|
|
#Function: get_ssh_size
|
|
#$1=dump target
|
|
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
|
|
get_ssh_size() {
|
|
local _opt _out _size
|
|
_opt="-i $SSH_KEY_LOCATION -o BatchMode=yes -o StrictHostKeyChecking=yes"
|
|
_out=$(ssh -q -n $_opt $1 "df -P $SAVE_PATH")
|
|
[ $? -ne 0 ] && {
|
|
perror_exit "checking remote ssh server available size failed."
|
|
}
|
|
|
|
#ssh output removed the line break, so print field NF-2
|
|
_size=$(echo -n $_out| awk '{avail=NF-2; print $avail}')
|
|
echo -n $_size
|
|
}
|
|
|
|
#mkdir if save path does not exist on ssh dump target
|
|
#$1=ssh dump target
|
|
#caller should ensure write permission on $DUMP_TARGET:$SAVE_PATH
|
|
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
|
|
mkdir_save_path_ssh()
|
|
{
|
|
local _opt _dir
|
|
_opt="-i $SSH_KEY_LOCATION -o BatchMode=yes -o StrictHostKeyChecking=yes"
|
|
ssh -qn $_opt $1 mkdir -p $SAVE_PATH 2>&1 > /dev/null
|
|
_ret=$?
|
|
if [ $_ret -ne 0 ]; then
|
|
perror_exit "mkdir failed on $DUMP_TARGET:$SAVE_PATH"
|
|
fi
|
|
|
|
#check whether user has write permission on $SAVE_PATH/$DUMP_TARGET
|
|
_dir=$(ssh -qn $_opt $1 mktemp -dqp $SAVE_PATH 2>/dev/null)
|
|
_ret=$?
|
|
if [ $_ret -ne 0 ]; then
|
|
perror_exit "Could not create temporary directory on $DUMP_TARGET:$SAVE_PATH. Make sure user has write permission on destination"
|
|
fi
|
|
ssh -qn $_opt $1 rmdir $_dir
|
|
|
|
return 0
|
|
}
|
|
|
|
#Function: get_fs_size
|
|
#$1=dump target
|
|
get_fs_size() {
|
|
local _mnt=$(get_mntpoint_from_target $1)
|
|
echo -n $(df -P "${_mnt}/$SAVE_PATH"|tail -1|awk '{print $4}')
|
|
}
|
|
|
|
#Function: get_raw_size
|
|
#$1=dump target
|
|
get_raw_size() {
|
|
echo -n $(fdisk -s "$1")
|
|
}
|
|
|
|
#Function: check_size
|
|
#$1: dump type string ('raw', 'fs', 'ssh')
|
|
#$2: dump target
|
|
check_size() {
|
|
local avail memtotal
|
|
|
|
memtotal=$(awk '/MemTotal/{print $2}' /proc/meminfo)
|
|
case "$1" in
|
|
raw)
|
|
avail=$(get_raw_size "$2")
|
|
;;
|
|
ssh)
|
|
avail=$(get_ssh_size "$2")
|
|
;;
|
|
fs)
|
|
avail=$(get_fs_size "$2")
|
|
;;
|
|
*)
|
|
return
|
|
esac
|
|
|
|
if [ $? -ne 0 ]; then
|
|
perror_exit "Check dump target size failed"
|
|
fi
|
|
|
|
if [ $avail -lt $memtotal ]; then
|
|
echo "Warning: There might not be enough space to save a vmcore."
|
|
echo " The size of $2 should be greater than $memtotal kilo bytes."
|
|
fi
|
|
}
|
|
|
|
# $1: core_collector config value
|
|
verify_core_collector() {
|
|
if grep -q "^raw" $conf_file && [ "${1%% *}" != "makedumpfile" ]; then
|
|
echo "Warning: specifying a non-makedumpfile core collector, you will have to recover the vmcore manually."
|
|
fi
|
|
if is_ssh_dump_target || is_raw_dump_target; then
|
|
if [ "${1%% *}" = "makedumpfile" ]; then
|
|
! strstr "$1" "-F" && {
|
|
perror_exit "The specified dump target needs makedumpfile \"-F\" option."
|
|
}
|
|
fi
|
|
fi
|
|
}
|
|
|
|
add_mount() {
|
|
local _mnt=$(to_mount "$1")
|
|
|
|
if [ $? -ne 0 ]; then
|
|
exit 1
|
|
fi
|
|
|
|
add_dracut_mount "$_mnt"
|
|
}
|
|
|
|
# get_maj_min <device>
|
|
# Prints the major and minor of a device node.
|
|
# Example:
|
|
# $ get_maj_min /dev/sda2
|
|
# 8:2
|
|
get_maj_min() {
|
|
local _dev
|
|
_dev=$(stat -L -c '$((0x%t)):$((0x%T))' "$1" 2>/dev/null)
|
|
_dev=$(eval "echo $_dev")
|
|
echo $_dev
|
|
}
|
|
|
|
# ugly workaround for the lvm design
|
|
# There is no volume group device,
|
|
# so, there are no slave devices for volume groups.
|
|
# Logical volumes only have the slave devices they really live on,
|
|
# but you cannot create the logical volume without the volume group.
|
|
# And the volume group might be bigger than the devices the LV needs.
|
|
check_vol_slaves() {
|
|
local _lv _vg _pv
|
|
for i in /dev/mapper/*; do
|
|
_lv=$(get_maj_min $i)
|
|
if [[ $_lv = $2 ]]; then
|
|
_vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)
|
|
# strip space
|
|
_vg=$(echo $_vg)
|
|
if [[ $_vg ]]; then
|
|
for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2>/dev/null)
|
|
do
|
|
check_block_and_slaves $1 $(get_maj_min $_pv) && return 0
|
|
done
|
|
fi
|
|
fi
|
|
done
|
|
return 1
|
|
}
|
|
|
|
# Walk all the slave relationships for a given block device.
|
|
# Stop when our helper function returns success
|
|
# $1 = function to call on every found block device
|
|
# $2 = block device in major:minor format
|
|
check_block_and_slaves() {
|
|
local _x
|
|
[[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
|
|
"$1" $2 && return
|
|
check_vol_slaves "$@" && return 0
|
|
if [[ -f /sys/dev/block/$2/../dev ]]; then
|
|
check_block_and_slaves $1 $(cat "/sys/dev/block/$2/../dev") && return 0
|
|
fi
|
|
[[ -d /sys/dev/block/$2/slaves ]] || return 1
|
|
for _x in /sys/dev/block/$2/slaves/*/dev; do
|
|
[[ -f $_x ]] || continue
|
|
check_block_and_slaves $1 $(cat "$_x") && return 0
|
|
done
|
|
return 1
|
|
}
|
|
|
|
#handle the case user does not specify the dump target explicitly
|
|
handle_default_dump_target()
|
|
{
|
|
local _target
|
|
local _mntpoint
|
|
|
|
is_user_configured_dump_target && return
|
|
|
|
check_save_path_fs $SAVE_PATH
|
|
|
|
_mntpoint=$(get_mntpoint_from_path $SAVE_PATH)
|
|
_target=$(get_target_from_path $SAVE_PATH)
|
|
|
|
if is_atomic && is_bind_mount $_mntpoint; then
|
|
SAVE_PATH=${SAVE_PATH##"$_mntpoint"}
|
|
# the real dump path in the 2nd kernel, if the mount point is bind mounted.
|
|
SAVE_PATH=$(get_bind_mount_directory $_mntpoint)/$SAVE_PATH
|
|
_mntpoint=$(get_mntpoint_from_target $_target)
|
|
|
|
# the absolute path in the 1st kernel
|
|
SAVE_PATH=$_mntpoint/$SAVE_PATH
|
|
fi
|
|
|
|
SAVE_PATH=${SAVE_PATH##"$_mntpoint"}
|
|
add_mount "$_target"
|
|
check_size fs $_target
|
|
}
|
|
|
|
get_override_resettable()
|
|
{
|
|
local override_resettable
|
|
|
|
override_resettable=$(grep "^override_resettable" $conf_file)
|
|
if [ -n "$override_resettable" ]; then
|
|
OVERRIDE_RESETTABLE=$(echo $override_resettable | cut -d' ' -f2)
|
|
if [ "$OVERRIDE_RESETTABLE" != "0" ] && [ "$OVERRIDE_RESETTABLE" != "1" ];then
|
|
perror_exit "override_resettable value $OVERRIDE_RESETTABLE is invalid"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
|
|
# $1: function name
|
|
for_each_block_target()
|
|
{
|
|
local dev majmin
|
|
|
|
for dev in $(get_kdump_targets); do
|
|
[ -b "$dev" ] || continue
|
|
majmin=$(get_maj_min $dev)
|
|
check_block_and_slaves $1 $majmin && return 1
|
|
done
|
|
|
|
return 0
|
|
}
|
|
|
|
|
|
|
|
#judge if a specific device with $1 is unresettable
|
|
#return false if unresettable.
|
|
is_unresettable()
|
|
{
|
|
local path="/sys/$(udevadm info --query=all --path=/sys/dev/block/$1 | awk '/^P:/ {print $2}' | sed -e 's/\(cciss[0-9]\+\/\).*/\1/g' -e 's/\/block\/.*$//')/resettable"
|
|
local resettable=1
|
|
|
|
if [ -f "$path" ]
|
|
then
|
|
resettable="$(cat $path)"
|
|
[ $resettable -eq 0 -a "$OVERRIDE_RESETTABLE" -eq 0 ] && {
|
|
local device=$(udevadm info --query=all --path=/sys/dev/block/$1 | awk -F= '/DEVNAME/{print $2}')
|
|
echo "Error: Can not save vmcore because device $device is unresettable"
|
|
return 0
|
|
}
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
#check if machine is resettable.
|
|
#return true if resettable
|
|
check_resettable()
|
|
{
|
|
local _ret _target
|
|
|
|
get_override_resettable
|
|
|
|
for_each_block_target is_unresettable
|
|
_ret=$?
|
|
|
|
[ $_ret -eq 0 ] && return
|
|
|
|
return 1
|
|
}
|
|
|
|
# $1: maj:min
|
|
is_crypt()
|
|
{
|
|
local majmin=$1 dev line ID_FS_TYPE=""
|
|
|
|
line=$(udevadm info --query=property --path=/sys/dev/block/$majmin \
|
|
| grep "^ID_FS_TYPE")
|
|
eval "$line"
|
|
[[ "$ID_FS_TYPE" = "crypto_LUKS" ]] && {
|
|
dev=$(udevadm info --query=all --path=/sys/dev/block/$majmin | awk -F= '/DEVNAME/{print $2}')
|
|
echo "Device $dev is encrypted."
|
|
return 0
|
|
}
|
|
return 1
|
|
}
|
|
|
|
check_crypt()
|
|
{
|
|
local _ret _target
|
|
|
|
for_each_block_target is_crypt
|
|
_ret=$?
|
|
|
|
[ $_ret -eq 0 ] && return
|
|
|
|
return 1
|
|
}
|
|
|
|
if ! check_resettable; then
|
|
exit 1
|
|
fi
|
|
|
|
if ! check_crypt; then
|
|
echo "Warning: Encrypted device is in dump path. User will prompted for password during second kernel boot."
|
|
fi
|
|
|
|
# firstly get right SSH_KEY_LOCATION
|
|
keyfile=$(awk '/^sshkey/ {print $2}' $conf_file)
|
|
if [ -f "$keyfile" ]; then
|
|
# canonicalize the path
|
|
SSH_KEY_LOCATION=$(/usr/bin/readlink -m $keyfile)
|
|
fi
|
|
|
|
if [ "$(uname -m)" = "s390x" ]; then
|
|
add_dracut_module "znet"
|
|
fi
|
|
|
|
while read config_opt config_val;
|
|
do
|
|
# remove inline comments after the end of a directive.
|
|
config_val=$(strip_comments $config_val)
|
|
case "$config_opt" in
|
|
extra_modules)
|
|
extra_modules="$extra_modules $config_val"
|
|
;;
|
|
ext[234]|xfs|btrfs|minix|nfs)
|
|
if ! findmnt $config_val >/dev/null; then
|
|
perror_exit "Dump target $config_val is probably not mounted."
|
|
fi
|
|
|
|
_absolute_save_path=$(make_absolute_save_path $config_val)
|
|
_mntpoint=$(get_mntpoint_from_path $_absolute_save_path)
|
|
if is_atomic && is_bind_mount $_mntpoint; then
|
|
SAVE_PATH=${_absolute_save_path##"$_mntpoint"}
|
|
# the real dump path in the 2nd kernel, if the mount point is bind mounted.
|
|
SAVE_PATH=$(get_bind_mount_directory $_mntpoint)/$SAVE_PATH
|
|
fi
|
|
|
|
add_mount "$config_val"
|
|
check_save_path_fs $_absolute_save_path
|
|
check_size fs $config_val
|
|
;;
|
|
raw)
|
|
#checking raw disk writable
|
|
dd if=$config_val count=1 of=/dev/null > /dev/null 2>&1 || {
|
|
perror_exit "Bad raw disk $config_val"
|
|
}
|
|
_praw=$(kdump_get_persistent_dev $config_val "raw")
|
|
if [ $? -ne 0 ]; then
|
|
exit 1
|
|
fi
|
|
add_dracut_arg "--device" "$_praw"
|
|
check_size raw $config_val
|
|
;;
|
|
ssh)
|
|
if strstr "$config_val" "@";
|
|
then
|
|
check_size ssh $config_val
|
|
mkdir_save_path_ssh $config_val
|
|
add_dracut_module "ssh-client"
|
|
add_dracut_sshkey "$SSH_KEY_LOCATION"
|
|
else
|
|
perror_exit "Bad ssh dump target $config_val"
|
|
fi
|
|
;;
|
|
core_collector)
|
|
verify_core_collector "$config_val"
|
|
;;
|
|
dracut_args)
|
|
add_dracut_arg $config_val
|
|
;;
|
|
*)
|
|
if [ -n $(echo $config_opt | grep "^#.*$") ]
|
|
then
|
|
continue
|
|
fi
|
|
;;
|
|
esac
|
|
done < $conf_file
|
|
|
|
handle_default_dump_target
|
|
|
|
if [ -n "$extra_modules" ]
|
|
then
|
|
add_dracut_arg "--add-drivers" "$extra_modules"
|
|
fi
|
|
|
|
if ! is_fadump_capable; then
|
|
# The 2nd rootfs mount stays behind the normal dump target mount,
|
|
# so it doesn't affect the logic of check_dump_fs_modified().
|
|
is_dump_to_rootfs && add_mount "$(to_dev_name $(get_root_fs_device))"
|
|
|
|
add_dracut_arg "--no-hostonly-default-device"
|
|
fi
|
|
|
|
dracut "${dracut_args[@]}" "$@"
|
|
_rc=$?
|
|
sync
|
|
exit $_rc
|