6d45257cc1
Some `cat` calls are useless, remove them to make it cleaner. See: https://github.com/koalaman/shellcheck/wiki/SC2002 Signed-off-by: Kairui Song <kasong@redhat.com> Acked-by: Philipp Rudo <prudo@redhat.com>
462 lines
13 KiB
Bash
462 lines
13 KiB
Bash
#!/bin/bash --norc
|
|
# New mkdumprd
|
|
#
|
|
# Copyright 2011 Red Hat, Inc.
|
|
#
|
|
# Written by Cong Wang <amwang@redhat.com>
|
|
#
|
|
|
|
if [ -f /etc/sysconfig/kdump ]; then
|
|
. /etc/sysconfig/kdump
|
|
fi
|
|
|
|
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
|
|
. $dracutbasedir/dracut-functions.sh
|
|
. /lib/kdump/kdump-lib.sh
|
|
. /lib/kdump/kdump-logger.sh
|
|
export IN_KDUMP=1
|
|
|
|
#initiate the kdump logger
|
|
dlog_init
|
|
if [ $? -ne 0 ]; then
|
|
echo "failed to initiate the kdump logger."
|
|
exit 1
|
|
fi
|
|
|
|
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
|
|
SAVE_PATH=$(get_save_path)
|
|
OVERRIDE_RESETTABLE=0
|
|
|
|
extra_modules=""
|
|
dracut_args=( --add kdumpbase --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode strict -o "plymouth dash resume ifcfg earlykdump" )
|
|
|
|
readonly MKDUMPRD_TMPDIR="$(mktemp -d -t mkdumprd.XXXXXX)"
|
|
[ -d "$MKDUMPRD_TMPDIR" ] || perror_exit "dracut: mktemp -p -d -t dracut.XXXXXX failed."
|
|
readonly MKDUMPRD_TMPMNT="$MKDUMPRD_TMPDIR/target"
|
|
|
|
trap '
|
|
ret=$?;
|
|
is_mounted $MKDUMPRD_TMPMNT && umount -f $MKDUMPRD_TMPMNT;
|
|
[[ -d $MKDUMPRD_TMPDIR ]] && rm --one-file-system -rf -- "$MKDUMPRD_TMPDIR";
|
|
exit $ret;
|
|
' EXIT
|
|
|
|
# clean up after ourselves no matter how we die.
|
|
trap 'exit 1;' SIGINT
|
|
|
|
add_dracut_arg() {
|
|
dracut_args+=( "$@" )
|
|
}
|
|
|
|
add_dracut_mount() {
|
|
add_dracut_arg "--mount" "$1"
|
|
}
|
|
|
|
add_dracut_sshkey() {
|
|
add_dracut_arg "--sshkey" "$1"
|
|
}
|
|
|
|
# caller should ensure $1 is valid and mounted in 1st kernel
|
|
to_mount() {
|
|
local _target=$1 _fstype=$2 _options=$3 _new_mntpoint _pdev
|
|
|
|
_new_mntpoint=$(get_kdump_mntpoint_from_target $_target)
|
|
_fstype="${_fstype:-$(get_fs_type_from_target $_target)}"
|
|
_options="${_options:-$(get_mntopt_from_target $_target)}"
|
|
_options="${_options:-defaults}"
|
|
|
|
if [[ "$_fstype" == "nfs"* ]]; then
|
|
_pdev=$_target
|
|
_options=$(echo $_options | sed 's/,addr=[^,]*//')
|
|
_options=$(echo $_options | sed 's/,proto=[^,]*//')
|
|
_options=$(echo $_options | sed 's/,clientaddr=[^,]*//')
|
|
else
|
|
# for non-nfs _target converting to use udev persistent name
|
|
_pdev="$(kdump_get_persistent_dev $_target)"
|
|
if [ -z "$_pdev" ]; then
|
|
return 1
|
|
fi
|
|
fi
|
|
|
|
# mount fs target as rw in 2nd kernel
|
|
_options=$(echo $_options | sed 's/\(^\|,\)ro\($\|,\)/\1rw\2/g')
|
|
# with 'noauto' in fstab nfs and non-root disk mount will fail in 2nd
|
|
# kernel, filter it out here.
|
|
_options=$(echo $_options | sed 's/\(^\|,\)noauto\($\|,\)/\1/g')
|
|
# drop nofail or nobootwait
|
|
_options=$(echo $_options | sed 's/\(^\|,\)nofail\($\|,\)/\1/g')
|
|
_options=$(echo $_options | sed 's/\(^\|,\)nobootwait\($\|,\)/\1/g')
|
|
|
|
echo "$_pdev $_new_mntpoint $_fstype $_options"
|
|
}
|
|
|
|
#Function: get_ssh_size
|
|
#$1=dump target
|
|
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
|
|
get_ssh_size() {
|
|
local _out
|
|
local _opt=("-i" "$SSH_KEY_LOCATION" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=yes")
|
|
|
|
if ! _out=$(ssh -q -n "${_opt[@]}" "$1" "df" "--output=avail" "$SAVE_PATH"); then
|
|
perror_exit "checking remote ssh server available size failed."
|
|
fi
|
|
|
|
echo -n "$_out" | tail -1
|
|
}
|
|
|
|
#mkdir if save path does not exist on ssh dump target
|
|
#$1=ssh dump target
|
|
#caller should ensure write permission on $1:$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 $1:$SAVE_PATH"
|
|
fi
|
|
|
|
#check whether user has write permission on $1:$SAVE_PATH
|
|
_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 $1:$SAVE_PATH. Make sure user has write permission on destination"
|
|
fi
|
|
ssh -qn "${_opt[@]}" $1 rmdir $_dir
|
|
|
|
return 0
|
|
}
|
|
|
|
#Function: get_fs_size
|
|
#$1=dump target
|
|
get_fs_size() {
|
|
df --output=avail "$(get_mntpoint_from_target "$1")/$SAVE_PATH" | tail -1
|
|
}
|
|
|
|
#Function: get_raw_size
|
|
#$1=dump target
|
|
get_raw_size() {
|
|
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
|
|
dwarn "Warning: There might not be enough space to save a vmcore."
|
|
dwarn " The size of $2 should be greater than $memtotal kilo bytes."
|
|
fi
|
|
}
|
|
|
|
check_save_path_fs()
|
|
{
|
|
local _path=$1
|
|
|
|
if [ ! -d $_path ]; then
|
|
perror_exit "Dump path $_path does not exist."
|
|
fi
|
|
}
|
|
|
|
mount_failure()
|
|
{
|
|
local _target=$1
|
|
local _mnt=$2
|
|
local _fstype=$3
|
|
local msg="Failed to mount $_target"
|
|
|
|
if [ -n "$_mnt" ]; then
|
|
msg="$msg on $_mnt"
|
|
fi
|
|
|
|
msg="$msg for kdump preflight check."
|
|
|
|
if [[ $_fstype = "nfs" ]]; then
|
|
msg="$msg Please make sure nfs-utils has been installed."
|
|
fi
|
|
|
|
perror_exit "$msg"
|
|
}
|
|
|
|
check_user_configured_target()
|
|
{
|
|
local _target=$1 _cfg_fs_type=$2 _mounted
|
|
local _mnt=$(get_mntpoint_from_target $_target)
|
|
local _opt=$(get_mntopt_from_target $_target)
|
|
local _fstype=$(get_fs_type_from_target $_target)
|
|
|
|
if [ -n "$_fstype" ]; then
|
|
# In case of nfs4, nfs should be used instead, nfs* options is deprecated in kdump.conf
|
|
[[ $_fstype = "nfs"* ]] && _fstype=nfs
|
|
|
|
if [ -n "$_cfg_fs_type" ] && [ "$_fstype" != "$_cfg_fs_type" ]; then
|
|
perror_exit "\"$_target\" have a wrong type config \"$_cfg_fs_type\", expected \"$_fstype\""
|
|
fi
|
|
else
|
|
_fstype="$_cfg_fs_type"
|
|
_fstype="$_cfg_fs_type"
|
|
fi
|
|
|
|
# For noauto mount, mount it inplace with default value.
|
|
# Else use the temporary target directory
|
|
if [ -n "$_mnt" ]; then
|
|
if ! is_mounted "$_mnt"; then
|
|
if [[ $_opt = *",noauto"* ]]; then
|
|
mount $_mnt
|
|
[ $? -ne 0 ] && mount_failure "$_target" "$_mnt" "$_fstype"
|
|
_mounted=$_mnt
|
|
else
|
|
perror_exit "Dump target \"$_target\" is neither mounted nor configured as \"noauto\""
|
|
fi
|
|
fi
|
|
else
|
|
_mnt=$MKDUMPRD_TMPMNT
|
|
mkdir -p $_mnt
|
|
mount $_target $_mnt -t $_fstype -o defaults
|
|
[ $? -ne 0 ] && mount_failure "$_target" "" "$_fstype"
|
|
_mounted=$_mnt
|
|
fi
|
|
|
|
# For user configured target, use $SAVE_PATH as the dump path within the target
|
|
if [ ! -d "$_mnt/$SAVE_PATH" ]; then
|
|
perror_exit "Dump path \"$_mnt/$SAVE_PATH\" does not exist in dump target \"$_target\""
|
|
fi
|
|
|
|
check_size fs "$_target"
|
|
|
|
# Unmount it early, if function is interrupted and didn't reach here, the shell trap will clear it up anyway
|
|
if [ -n "$_mounted" ]; then
|
|
umount -f -- $_mounted
|
|
fi
|
|
}
|
|
|
|
# $1: core_collector config value
|
|
verify_core_collector() {
|
|
local _cmd="${1%% *}"
|
|
local _params="${1#* }"
|
|
|
|
if [ "$_cmd" != "makedumpfile" ]; then
|
|
if is_raw_dump_target; then
|
|
dwarn "Warning: specifying a non-makedumpfile core collector, you will have to recover the vmcore manually."
|
|
fi
|
|
return
|
|
fi
|
|
|
|
if is_ssh_dump_target || is_raw_dump_target; then
|
|
if ! strstr "$_params" "-F"; then
|
|
perror_exit "The specified dump target needs makedumpfile \"-F\" option."
|
|
fi
|
|
_params="$_params vmcore"
|
|
else
|
|
_params="$_params vmcore dumpfile"
|
|
fi
|
|
|
|
if ! $_cmd --check-params $_params; then
|
|
perror_exit "makedumpfile parameter check failed."
|
|
fi
|
|
}
|
|
|
|
add_mount() {
|
|
local _mnt=$(to_mount $@)
|
|
|
|
if [ $? -ne 0 ]; then
|
|
exit 1
|
|
fi
|
|
|
|
add_dracut_mount "$_mnt"
|
|
}
|
|
|
|
#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 $SAVE_PATH
|
|
|
|
_save_path=$(get_bind_mount_source $SAVE_PATH)
|
|
_target=$(get_target_from_path $_save_path)
|
|
_mntpoint=$(get_mntpoint_from_target $_target)
|
|
|
|
SAVE_PATH=${_save_path##"$_mntpoint"}
|
|
add_mount "$_target"
|
|
check_size fs $_target
|
|
}
|
|
|
|
# $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="$(<"$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}')
|
|
derror "Error: Can not save vmcore because device $device is unresettable"
|
|
return 0
|
|
}
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
#check if machine is resettable.
|
|
#return true if resettable
|
|
check_resettable()
|
|
{
|
|
local _ret _target _override_resettable
|
|
|
|
_override_resettable=$(kdump_get_conf_val override_resettable)
|
|
OVERRIDE_RESETTABLE=${_override_resettable:-$OVERRIDE_RESETTABLE}
|
|
if [ "$OVERRIDE_RESETTABLE" != "0" ] && [ "$OVERRIDE_RESETTABLE" != "1" ];then
|
|
perror_exit "override_resettable value '$OVERRIDE_RESETTABLE' is invalid"
|
|
fi
|
|
|
|
for_each_block_target is_unresettable
|
|
_ret=$?
|
|
|
|
[ $_ret -eq 0 ] && return
|
|
|
|
return 1
|
|
}
|
|
|
|
check_crypt()
|
|
{
|
|
local _dev
|
|
|
|
for _dev in $(get_kdump_targets); do
|
|
if [[ -n $(get_luks_crypt_dev "$(get_maj_min "$_dev")") ]]; then
|
|
derror "Device $_dev is encrypted." && return 1
|
|
fi
|
|
done
|
|
}
|
|
|
|
if ! check_resettable; then
|
|
exit 1
|
|
fi
|
|
|
|
if ! check_crypt; then
|
|
dwarn "Warning: Encrypted device is in dump path, which is not recommended, see kexec-kdump-howto.txt for more details."
|
|
fi
|
|
|
|
# firstly get right SSH_KEY_LOCATION
|
|
keyfile=$(kdump_get_conf_val sshkey)
|
|
if [ -f "$keyfile" ]; then
|
|
# canonicalize the path
|
|
SSH_KEY_LOCATION=$(/usr/bin/readlink -m $keyfile)
|
|
fi
|
|
|
|
while read config_opt config_val;
|
|
do
|
|
# remove inline comments after the end of a directive.
|
|
case "$config_opt" in
|
|
extra_modules)
|
|
extra_modules="$extra_modules $config_val"
|
|
;;
|
|
ext[234]|xfs|btrfs|minix|nfs)
|
|
check_user_configured_target "$config_val" "$config_opt"
|
|
add_mount "$config_val" "$config_opt"
|
|
;;
|
|
raw)
|
|
# checking raw disk writable
|
|
dd if=$config_val count=1 of=/dev/null > /dev/null 2>&1 || {
|
|
perror_exit "Bad raw disk $config_val"
|
|
}
|
|
_praw=$(persistent_policy="by-id" kdump_get_persistent_dev $config_val)
|
|
if [ -z "$_praw" ]; then
|
|
exit 1
|
|
fi
|
|
add_dracut_arg "--device" "$_praw"
|
|
check_size raw $config_val
|
|
;;
|
|
ssh)
|
|
if strstr "$config_val" "@";
|
|
then
|
|
mkdir_save_path_ssh $config_val
|
|
check_size ssh $config_val
|
|
add_dracut_sshkey "$SSH_KEY_LOCATION"
|
|
else
|
|
perror_exit "Bad ssh dump target $config_val"
|
|
fi
|
|
;;
|
|
core_collector)
|
|
verify_core_collector "$config_val"
|
|
;;
|
|
dracut_args)
|
|
while read -r dracut_arg; do
|
|
add_dracut_arg "$dracut_arg"
|
|
done <<< "$(echo "$config_val" | xargs -n 1 echo)"
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
done <<< "$(kdump_read_conf)"
|
|
|
|
handle_default_dump_target
|
|
|
|
if [ -n "$extra_modules" ]
|
|
then
|
|
add_dracut_arg "--add-drivers" "$extra_modules"
|
|
fi
|
|
|
|
# TODO: The below check is not needed anymore with the introduction of
|
|
# 'zz-fadumpinit' module, that isolates fadump's capture kernel initrd,
|
|
# but still sysroot.mount unit gets generated based on 'root=' kernel
|
|
# parameter available in fadump case. So, find a way to fix that first
|
|
# before removing this check.
|
|
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
|