Файловый менеджер

Файловый менеджер - Редактировать - /usr/sbin/mkdumprd

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#!/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 [ $? -ne 0 ]; then echo "failed to initiate the kdump logger." exit 1 fi conf_file="/etc/kdump.conf" SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa" SAVE_PATH=$(get_save_path) OVERRIDE_RESETTABLE=0 extra_modules="" dracut_args="--add kdumpbase --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode strict --hostonly-nics '' -o \"plymouth dash resume ifcfg earlykdump\" --compress=xz" 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 $ret; ' EXIT # clean up after ourselves no matter how we die. trap 'exit 1;' SIGINT add_dracut_arg() { dracut_args="$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 $_options \| sed 's/,$mount$\?addr=[^,]//g') _options=$(echo $_options \| sed 's/,$mount$\?proto=[^,]//g') _options=$(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$$\\|,$/\1rw\2/g') # with 'noauto' in fstab nfs and non-root disk mount will fail in 2nd # kernel, filter it out here. _options=$(echo $_options \| sed 's/$^\\|,$noauto$$\\|,$/\1/g') # use both nofail and x-systemd.before to ensure systemd will try best to # mount it before kdump starts, this is an attempt to improve robustness _options="$_options,nofail,x-systemd.before=initrd-fs.target" 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 _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 $1:$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 #$1=dump target get_fs_size() { local _mnt=$(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 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 } 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 ] && perror_exit "Failed to mount $_target on $_mnt for kdump preflight check." _mounted=$_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 ] && perror_exit "Failed to mount $_target for kdump preflight check." _mounted=$_mnt fi # For user configured target, use $SAVE_PATH as the dump path within the target if [ ! -d "$_mnt/$SAVE_PATH" ]; then perror_exit "Dump path \"$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="${1#${_cmd}}" 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 $_target } get_override_resettable() { local override_resettable override_resettable=$(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}') derror "Error: Can not save vmcore because device $device is unresettable" return 0 } fi return 1 } #check if machine is resettable. #return true if resettable check_resettable() { local _ret _target get_override_resettable for_each_block_target is_unresettable _ret=$? [ $_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 $_dev is encrypted." && return 1 fi done } if ! check_resettable; then exit 1 fi if ! check_crypt; then dwarn "Warning: Encrypted device is in dump path. User will prompted for password during second kernel boot." fi # firstly get right SSH_KEY_LOCATION keyfile=$(awk '/^sshkey/ {print $2}' $conf_file) if [ -f "$keyfile" ]; then # canonicalize the path SSH_KEY_LOCATION=$(/usr/bin/readlink -m $keyfile) fi while read config_opt config_val; do # remove inline comments after the end of a directive. case "$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) add_dracut_arg $config_val ;; ) ;; esac done <<< "$(read_strip_comments $conf_file)" handle_default_dump_target if [ -n "$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 $(get_root_fs_device))" add_dracut_arg "--no-hostonly-default-device" if fips-mode-setup --is-enabled 2> /dev/null; then add_dracut_arg --add-device "$(findmnt -n -o SOURCE --target /boot)" fi fi echo "$dracut_args $@" \| xargs dracut

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