484 lines
12 KiB
Bash
Executable File
484 lines
12 KiB
Bash
Executable File
#!/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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perror_exit() {
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echo $@ >&2
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exit 1
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}
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perror() {
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echo $@ >&2
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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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strip_comments()
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{
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echo $@ | sed -e 's/\(.*\)#.*/\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 $_target
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}
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get_root_fs_device()
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{
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local _target
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_target=$(findmnt -k -f -n -o SOURCE /)
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[ -n "$_target" ] && echo $_target
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return
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}
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get_save_path()
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{
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local _save_path=$(grep "^path" /etc/kdump.conf|awk '{print $2}')
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if [ -z "$_save_path" ]; then
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_save_path=$DEFAULT_PATH
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fi
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echo $_save_path
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}
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get_block_dump_target()
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{
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local _target _path
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if is_ssh_dump_target || is_nfs_dump_target; then
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return
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fi
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_target=$(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 $_target)
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}
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is_dump_to_rootfs()
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{
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grep "^default[[:space:]]dump_to_rootfs" /etc/kdump.conf >/dev/null
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}
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get_default_action_target()
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{
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local _target
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if is_dump_to_rootfs; then
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# Get rootfs device name
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_target=$(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=$(get_default_action_target)
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if [ -n "$_root" -a "$kdump_targets" != "$_root" ]; then
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kdump_targets="$kdump_targets $_root"
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fi
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# NOTE:
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# dracut parses devices from "/etc/fstab" with the "x-initrd.mount" option,
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# which will be added as host_devs, it also includes usually simple devices
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# (say mounted to /boot, /boot/efi/, etc) plus the root device. Then kdump
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# must wait for these devices if initramfs is built with "--hostonly-cmdline".
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#
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# We don't pass "--hostonly-cmdline" to dracut, so there's no problem.
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echo "$kdump_targets"
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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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# $_mntpoint_nofsroot, the mountpoint is not bind mounted directory.
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is_bind_mount()
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{
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local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
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local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
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if [[ $_mntpoint = $_mntpoint_nofsroot ]]; then
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return 1
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else
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return 0
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fi
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}
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# Below is just an example for mount info
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# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
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# directory is bind mounted. The former part represents the device path, rest
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# part is the bind mounted directory which quotes by bracket "[]".
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get_bind_mount_directory()
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{
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local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
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local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
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_mntpoint=${_mntpoint#*$_mntpoint_nofsroot}
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_mntpoint=${_mntpoint#[}
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_mntpoint=${_mntpoint%]}
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echo $_mntpoint
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}
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get_mntpoint_from_path()
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{
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echo $(df $1 | tail -1 | awk '{print $NF}')
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}
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get_target_from_path()
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{
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local _target
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_target=$(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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get_fs_type_from_target()
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{
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echo $(findmnt -k -f -n -r -o FSTYPE $1)
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}
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# input: device path
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# output: the general mount point
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# find the general mount point, not the bind mounted point in atomic
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# As general system, Use the previous code
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#
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# ERROR and EXIT:
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# the device can be umounted the general mount point, if one of the mount point is bind mounted
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# For example:
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# mount /dev/sda /mnt/
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# mount -o bind /mnt/var /var
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# umount /mnt
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get_mntpoint_from_target()
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{
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if is_atomic; then
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for _mnt in $(findmnt -k -n -r -o TARGET $1)
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do
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if ! is_bind_mount $_mnt; then
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echo $_mnt
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return
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fi
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done
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echo "Mount $1 firstly, without the bind mode" >&2
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exit 1
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else
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echo $(findmnt -k -f -n -r -o TARGET $1)
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fi
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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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echo $(strip_comments `grep "^$1[[:space:]]\+" /etc/kdump.conf | tail -1 | cut -d\ -f2-`)
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}
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#This function compose a absolute path with the mount
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#point and the relative $SAVE_PATH.
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#target is passed in as argument, could be UUID, LABEL,
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#block device or even nfs server export of the form of
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#"my.server.com:/tmp/export"?
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#And possibly this could be used for both default case
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#as well as when dump taret is specified. When dump
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#target is not specified, then $target would be null.
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make_absolute_save_path()
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{
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local _target=$1
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local _mnt
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[ -n $_target ] && _mnt=$(get_mntpoint_from_target $1)
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_mnt="${_mnt}/$SAVE_PATH"
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# strip the duplicated "/"
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echo "$_mnt" | tr -s /
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}
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check_save_path_fs()
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{
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local _path=$1
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if [ ! -d $_path ]; then
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perror_exit "Dump path $_path does not exist."
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fi
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}
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is_atomic()
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{
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grep -q "ostree" /proc/cmdline
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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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ifcfg_file=$(get_ifcfg_by_name "${1}")
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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return
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local hwaddr=$(get_hwaddr "${1}")
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if [ -n "$hwaddr" ]; then
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ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}")
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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return
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fi
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ifcfg_file=$(get_ifcfg_by_device "${1}")
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echo -n "${ifcfg_file}"
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}
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# $1: netdev name
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# Return the ifcfg file whole name(including the path) of $1 if any.
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get_ifcfg_filename() {
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local ifcfg_file
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ifcfg_file=$(get_ifcfg_nmcli "${1}")
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if [ -z "${ifcfg_file}" ]; then
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ifcfg_file=$(get_ifcfg_legacy "${1}")
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fi
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echo -n "${ifcfg_file}"
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}
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# returns 0 when omission of watchdog module is desired in dracut_args
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# returns 1 otherwise
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is_wdt_mod_omitted() {
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local dracut_args
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local ret=1
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dracut_args=$(grep "^dracut_args" /etc/kdump.conf)
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[[ -z $dracut_args ]] && return $ret
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eval set -- $dracut_args
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while :; do
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[[ -z $1 ]] && break
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case $1 in
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-o|--omit)
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echo $2 | grep -qw "watchdog"
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[[ $? == 0 ]] && ret=0
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break
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esac
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shift
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done
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return $ret
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}
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# If "dracut_args" contains "--mount" information, use it
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# directly without any check(users are expected to ensure
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# its correctness).
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is_mount_in_dracut_args()
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{
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grep -q "^dracut_args .*\-\-mount" /etc/kdump.conf
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}
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# If $1 contains dracut_args "--mount", return <filesystem type>
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get_dracut_args_fstype()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
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}
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# If $1 contains dracut_args "--mount", return <device>
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get_dracut_args_target()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
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}
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