#!/bin/sh

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#

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# Kdump common variables and functions

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#

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DEFAULT_PATH="/var/crash/"

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FENCE_KDUMP_CONFIG_FILE="/etc/sysconfig/fence_kdump"

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FENCE_KDUMP_SEND="/usr/libexec/fence_kdump_send"

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FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"

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LVM_CONF="/etc/lvm/lvm.conf"

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is_fadump_capable()

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{

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# Check if firmware-assisted dump is enabled

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# if no, fallback to kdump check

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if [ -f $FADUMP_ENABLED_SYS_NODE ]; then

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rc=`cat $FADUMP_ENABLED_SYS_NODE`

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[ $rc -eq 1 ] && return 0

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fi

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return 1

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}

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is_squash_available() {

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for kmodule in squashfs overlay loop; do

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if [ -z "$KDUMP_KERNELVER" ]; then

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modprobe --dry-run $kmodule &>/dev/null || return 1

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else

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modprobe -S $KDUMP_KERNELVER --dry-run $kmodule &>/dev/null || return 1

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fi

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done

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}

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perror_exit() {

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derror "$@"

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exit 1

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}

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is_ssh_dump_target()

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{

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grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf

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}

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is_nfs_dump_target()

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{

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grep -q "^nfs" /etc/kdump.conf || \

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[[ $(get_dracut_args_fstype "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)") = nfs* ]]

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}

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is_raw_dump_target()

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{

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grep -q "^raw" /etc/kdump.conf

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}

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is_fs_type_nfs()

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{

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local _fstype=$1

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[ $_fstype = "nfs" ] || [ $_fstype = "nfs4" ] && return 0

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return 1

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}

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is_fs_dump_target()

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{

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egrep -q "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf

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}

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is_lvm2_thinp_device()

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{

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_device_path=$1

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_lvm2_thin_device=$(lvm lvs -S 'lv_layout=sparse && lv_layout=thin' \

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--nosuffix --noheadings -o vg_name,lv_name "$_device_path" 2> /dev/null)

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[ -n "$_lvm2_thin_device" ]

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}

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strip_comments()

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{

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echo $@ | sed -e 's/\(.*\)#.*/\1/'

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}

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# Read from kdump config file stripping all comments

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read_strip_comments()

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{

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# strip heading spaces, and print any content starting with

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# neither space or #, and strip everything after #

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sed -n -e "s/^\s*\([^# \t][^#]\+\).*/\1/gp" $1

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}

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# Check if fence kdump is configured in Pacemaker cluster

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is_pcs_fence_kdump()

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{

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# no pcs or fence_kdump_send executables installed?

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type -P pcs > /dev/null || return 1

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[ -x $FENCE_KDUMP_SEND ] || return 1

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# fence kdump not configured?

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(pcs cluster cib | grep 'type="fence_kdump"') &> /dev/null || return 1

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}

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# Check if fence_kdump is configured using kdump options

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is_generic_fence_kdump()

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{

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[ -x $FENCE_KDUMP_SEND ] || return 1

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grep -q "^fence_kdump_nodes" /etc/kdump.conf

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}

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to_dev_name() {

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local dev="${1//\"/}"

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case "$dev" in

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UUID=*)

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dev=`blkid -U "${dev#UUID=}"`

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;;

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LABEL=*)

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dev=`blkid -L "${dev#LABEL=}"`

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;;

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esac

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echo $dev

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}

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is_user_configured_dump_target()

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{

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return $(is_mount_in_dracut_args || is_ssh_dump_target || is_nfs_dump_target || \

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is_raw_dump_target || is_fs_dump_target)

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}

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get_user_configured_dump_disk()

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{

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local _target

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_target=$(egrep "^ext[234]|^xfs|^btrfs|^minix|^raw" /etc/kdump.conf 2>/dev/null |awk '{print $2}')

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[ -n "$_target" ] && echo $_target && return

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_target=$(get_dracut_args_target "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)")

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[ -b "$_target" ] && echo $_target

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}

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get_root_fs_device()

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{

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findmnt -k -f -n -o SOURCE /

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}

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get_save_path()

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{

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local _save_path=$(awk '$1 == "path" {print $2}' /etc/kdump.conf)

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[ -z "$_save_path" ] && _save_path=$DEFAULT_PATH

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# strip the duplicated "/"

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echo $_save_path | tr -s /

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}

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get_block_dump_target()

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{

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local _target _path

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if is_ssh_dump_target || is_nfs_dump_target; then

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return

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fi

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_target=$(get_user_configured_dump_disk)

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[ -n "$_target" ] && echo $(to_dev_name $_target) && return

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# Get block device name from local save path

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_path=$(get_save_path)

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_target=$(get_target_from_path $_path)

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[ -b "$_target" ] && echo $(to_dev_name $_target)

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}

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is_dump_to_rootfs()

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{

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grep -E "^(failure_action|default)[[:space:]]dump_to_rootfs" /etc/kdump.conf >/dev/null

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}

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is_lvm2_thinp_dump_target()

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{

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_target=$(get_block_dump_target)

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[ -n "$_target" ] && is_lvm2_thinp_device "$_target"

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}

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get_failure_action_target()

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{

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local _target

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if is_dump_to_rootfs; then

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# Get rootfs device name

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_target=$(get_root_fs_device)

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[ -b "$_target" ] && echo $(to_dev_name $_target) && return

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# Then, must be nfs root

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echo "nfs"

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fi

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}

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# Get kdump targets(including root in case of dump_to_rootfs).

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get_kdump_targets()

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{

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local _target _root

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local kdump_targets

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_target=$(get_block_dump_target)

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if [ -n "$_target" ]; then

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kdump_targets=$_target

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elif is_ssh_dump_target; then

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kdump_targets="ssh"

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else

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kdump_targets="nfs"

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fi

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# Add the root device if dump_to_rootfs is specified.

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_root=$(get_failure_action_target)

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if [ -n "$_root" -a "$kdump_targets" != "$_root" ]; then

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kdump_targets="$kdump_targets $_root"

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fi

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echo "$kdump_targets"

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}

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# Return the bind mount source path, return the path itself if it's not bind mounted

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# Eg. if /path/to/src is bind mounted to /mnt/bind, then:

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# /mnt/bind -> /path/to/src, /mnt/bind/dump -> /path/to/src/dump

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#

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# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir]

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# in the SOURCE column for bind-mounts, then if $_mntpoint equals to

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# $_mntpoint_nofsroot, the mountpoint is not bind mounted directory.

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#

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# Below is just an example for mount info

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# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the

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# directory is bind mounted. The former part represents the device path, rest

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# part is the bind mounted directory which quotes by bracket "[]".

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get_bind_mount_source()

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{

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local _path=$1

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# In case it's a sub path in a mount point, get the mount point first

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local _mnt_top=$(df $_path | tail -1 | awk '{print $NF}')

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local _mntpoint=$(findmnt $_mnt_top | tail -n 1 | awk '{print $2}')

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local _mntpoint_nofsroot=$(findmnt -v $_mnt_top | tail -n 1 | awk '{print $2}')

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if [[ "$_mntpoint" = $_mntpoint_nofsroot ]]; then

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echo $_path && return

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fi

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_mntpoint=${_mntpoint#*$_mntpoint_nofsroot}

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_mntpoint=${_mntpoint#[}

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_mntpoint=${_mntpoint%]}

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_path=${_path#$_mnt_top}

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echo $_mntpoint$_path

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}

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# Return the current underlaying device of a path, ignore bind mounts

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get_target_from_path()

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{

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local _target

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_target=$(df $1 2>/dev/null | tail -1 | awk '{print $1}')

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[[ "$_target" == "/dev/root" ]] && [[ ! -e /dev/root ]] && _target=$(get_root_fs_device)

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echo $_target

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}

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is_mounted()

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{

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findmnt -k -n $1 &>/dev/null

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}

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get_mount_info()

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{

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local _info_type=$1 _src_type=$2 _src=$3; shift 3

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local _info=$(findmnt -k -n -r -o $_info_type --$_src_type $_src $@)

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[ -z "$_info" ] && [ -e "/etc/fstab" ] && _info=$(findmnt -s -n -r -o $_info_type --$_src_type $_src $@)

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echo $_info

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}

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get_fs_type_from_target()

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{

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get_mount_info FSTYPE source $1 -f

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}

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get_mntopt_from_target()

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{

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get_mount_info OPTIONS source $1 -f

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}

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# Find the general mount point of a dump target, not the bind mount point

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get_mntpoint_from_target()

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{

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# Expcilitly specify --source to findmnt could ensure non-bind mount is returned

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get_mount_info TARGET source $1 -f

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}

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# Get the path where the target will be mounted in kdump kernel

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# $1: kdump target device

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get_kdump_mntpoint_from_target()

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{

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local _mntpoint=$(get_mntpoint_from_target $1)

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# mount under /sysroot if dump to root disk or mount under

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# mount under /kdumproot if dump target is not mounted in first kernel

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# mount under /kdumproot/$_mntpoint in other cases in 2nd kernel.

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# systemd will be in charge to umount it.

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if [ -z "$_mntpoint" ];then

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_mntpoint="/kdumproot"

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else

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if [ "$_mntpoint" = "/" ];then

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_mntpoint="/sysroot"

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else

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_mntpoint="/kdumproot/$_mntpoint"

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fi

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fi

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# strip duplicated "/"

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echo $_mntpoint | tr -s "/"

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}

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# get_option_value <option_name>

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# retrieves value of option defined in kdump.conf

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get_option_value() {

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strip_comments `grep "^$1[[:space:]]\+" /etc/kdump.conf | tail -1 | cut -d\ -f2-`

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}

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kdump_get_persistent_dev() {

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local dev="${1//\"/}"

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case "$dev" in

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UUID=*)

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dev=`blkid -U "${dev#UUID=}"`

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;;

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LABEL=*)

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dev=`blkid -L "${dev#LABEL=}"`

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;;

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esac

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echo $(get_persistent_dev "$dev")

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}

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is_ostree()

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{

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test -f /run/ostree-booted

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}

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# fixme, try the best to decide whether the ipv6 addr is allocated by slaac or dhcp6

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is_ipv6_auto()

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{

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local _netdev=$1

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local _auto=$(cat /proc/sys/net/ipv6/conf/$_netdev/autoconf)

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if [ $_auto -eq 1 ]; then

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return 0

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else

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return 1

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fi

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}

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is_ipv6_address()

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{

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echo $1 | grep -q ":"

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}

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# get ip address or hostname from nfs/ssh config value

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get_remote_host()

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{

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local _config_val=$1

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# ipv6 address in kdump.conf is around with "[]",

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# factor out the ipv6 address

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_config_val=${_config_val#*@}

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_config_val=${_config_val%:/*}

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_config_val=${_config_val#[}

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_config_val=${_config_val%]}

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echo $_config_val

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}

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is_hostname()

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{

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local _hostname=`echo $1 | grep ":"`

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if [ -n "$_hostname" ]; then

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return 1

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fi

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echo $1 | grep -q "[a-zA-Z]"

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}

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# Copied from "/etc/sysconfig/network-scripts/network-functions"

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get_hwaddr()

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{

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if [ -f "/sys/class/net/${1}/address" ]; then

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awk '{ print toupper($0) }' < /sys/class/net/${1}/address

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elif [ -d "/sys/class/net/${1}" ]; then

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LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \

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awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,

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"\\1", 1)); }'

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fi

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}

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get_ifcfg_by_device()

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{

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grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \

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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1

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}

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get_ifcfg_by_hwaddr()

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{

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grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \

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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1

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}

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get_ifcfg_by_uuid()

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{

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grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \

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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1

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}

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get_ifcfg_by_name()

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{

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grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \

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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1

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}

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is_nm_running()

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{

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[ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" = "running" ]

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}

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is_nm_handling()

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{

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LANG=C nmcli -t --fields device,state dev status 2>/dev/null \

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| grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$"

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}

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# $1: netdev name

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get_ifcfg_nmcli()

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{

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local nm_uuid nm_name

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local ifcfg_file

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# Get the active nmcli config name of $1

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if is_nm_running && is_nm_handling "${1}" ; then

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# The configuration "uuid" and "name" generated by nm is wrote to

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# the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>".

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nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2>/dev/null \

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| grep "${1}" | head -1 | cut -d':' -f1)

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nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2>/dev/null \

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| grep "${1}" | head -1 | cut -d':' -f1)

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ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}")

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[ -z "${ifcfg_file}" ] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}")

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fi

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echo -n "${ifcfg_file}"

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}

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# $1: netdev name

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get_ifcfg_legacy()

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{

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local ifcfg_file

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ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}"

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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return

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[454] Fix | Delete

ifcfg_file=$(get_ifcfg_by_name "${1}")

[455] Fix | Delete

[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return

[456] Fix | Delete

[457] Fix | Delete

local hwaddr=$(get_hwaddr "${1}")

[458] Fix | Delete

if [ -n "$hwaddr" ]; then

[459] Fix | Delete

ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}")

[460] Fix | Delete

[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return

[461] Fix | Delete

fi

[462] Fix | Delete

[463] Fix | Delete

ifcfg_file=$(get_ifcfg_by_device "${1}")

[464] Fix | Delete

[465] Fix | Delete

echo -n "${ifcfg_file}"

[466] Fix | Delete

}

[467] Fix | Delete

[468] Fix | Delete

# $1: netdev name

[469] Fix | Delete

# Return the ifcfg file whole name(including the path) of $1 if any.

[470] Fix | Delete

get_ifcfg_filename() {

[471] Fix | Delete

local ifcfg_file

[472] Fix | Delete

[473] Fix | Delete

ifcfg_file=$(get_ifcfg_nmcli "${1}")

[474] Fix | Delete

if [ -z "${ifcfg_file}" ]; then

[475] Fix | Delete

ifcfg_file=$(get_ifcfg_legacy "${1}")

[476] Fix | Delete

fi

[477] Fix | Delete

[478] Fix | Delete

echo -n "${ifcfg_file}"

[479] Fix | Delete

}

[480] Fix | Delete

[481] Fix | Delete

# returns 0 when omission of a module is desired in dracut_args

[482] Fix | Delete

# returns 1 otherwise

[483] Fix | Delete

is_dracut_mod_omitted() {

[484] Fix | Delete

local dracut_args dracut_mod=$1

[485] Fix | Delete

[486] Fix | Delete

set -- $(grep "^dracut_args" /etc/kdump.conf)

[487] Fix | Delete

while [ $# -gt 0 ]; do

[488] Fix | Delete

case $1 in

[489] Fix | Delete

-o|--omit)

[490] Fix | Delete

[[ " ${2//[^[:alnum:]]/ } " == *" $dracut_mod "* ]] && return 0

[491] Fix | Delete

esac

[492] Fix | Delete

shift

[493] Fix | Delete

done

[494] Fix | Delete

[495] Fix | Delete

return 1

[496] Fix | Delete

}

[497] Fix | Delete

[498] Fix | Delete

is_wdt_active() {

[499] Fix | Delete