d55a056558
Move the workaround for aws graviton cpus from load_kdump to prepare_cmdline. This (1) makes the workaround available also for other callers of prepare_cmdline (although not needed at the moment) and (2) makes it easier to fix the problems found by the unit test included earlier as all changes to the cmdline are done at one place now. Signed-off-by: Philipp Rudo <prudo@redhat.com> Reviewed-by: Coiby Xu <coxu@redhat.com>
1067 lines
28 KiB
Bash
Executable File
1067 lines
28 KiB
Bash
Executable File
#!/bin/bash
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#
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# Kdump common variables and functions
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#
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if [[ ${__SOURCED__:+x} ]]; then
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. ./kdump-lib-initramfs.sh
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else
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. /lib/kdump/kdump-lib-initramfs.sh
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fi
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FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
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FADUMP_REGISTER_SYS_NODE="/sys/kernel/fadump_registered"
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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 $FADUMP_ENABLED_SYS_NODE ]]; then
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rc=$(< $FADUMP_ENABLED_SYS_NODE)
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[[ $rc -eq 1 ]] && return 0
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fi
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return 1
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}
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is_aws_aarch64()
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{
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[[ "$(lscpu | grep "BIOS Model name")" =~ "AWS Graviton" ]]
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}
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is_squash_available()
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{
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local _version kmodule
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_version=$(_get_kdump_kernel_version)
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for kmodule in squashfs overlay loop; do
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modprobe -S "$_version" --dry-run $kmodule &> /dev/null || return 1
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done
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}
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is_zstd_command_available()
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{
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[[ -x "$(command -v zstd)" ]]
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}
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dracut_have_option()
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{
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local _option=$1
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! dracut "$_option" 2>&1 | grep -q "unrecognized option"
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}
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perror_exit()
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{
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derror "$@"
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exit 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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[[ $(kdump_get_conf_val fence_kdump_nodes) ]]
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}
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to_dev_name()
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{
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local dev="${1//\"/}"
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case "$dev" in
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UUID=*)
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blkid -U "${dev#UUID=}"
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;;
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LABEL=*)
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blkid -L "${dev#LABEL=}"
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;;
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*)
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echo "$dev"
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;;
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esac
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}
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is_user_configured_dump_target()
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{
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[[ $(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw\|nfs\|ssh\|virtiofs") ]] || is_mount_in_dracut_args
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}
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get_block_dump_target()
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{
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local _target _fstype
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if is_ssh_dump_target || is_nfs_dump_target; then
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return
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fi
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_target=$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw\|virtiofs")
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[[ -n $_target ]] && to_dev_name "$_target" && return
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_target=$(get_dracut_args_target "$(kdump_get_conf_val "dracut_args")")
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[[ -b $_target ]] && to_dev_name "$_target" && return
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_fstype=$(get_dracut_args_fstype "$(kdump_get_conf_val "dracut_args")")
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is_fs_type_virtiofs "$_fstype" && echo "$_target" && return
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_target=$(get_target_from_path "$(get_save_path)")
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[[ -b $_target ]] && to_dev_name "$_target" && return
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_fstype=$(get_fs_type_from_target "$_target")
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is_fs_type_virtiofs "$_fstype" && echo "$_target" && return
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}
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is_dump_to_rootfs()
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{
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[[ $(kdump_get_conf_val 'failure_action\|default') == dump_to_rootfs ]]
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}
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is_lvm2_thinp_dump_target()
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{
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_target=$(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 $_target ]] && to_dev_name "$_target" && return
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is_fs_type_virtiofs "$(get_fs_type_from_target "$_target")" && echo "$_target" && return
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# Then, must be nfs root
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echo "nfs"
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fi
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}
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# Get kdump targets(including root in case of dump_to_rootfs).
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get_kdump_targets()
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{
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local _target _root
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local kdump_targets
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_target=$(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 ]] && [[ $kdump_targets != "$_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 $_src equals to
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# $_src_nofsroot, the mountpoint is not bind mounted directory.
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#
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# Below is just an example for mount info
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# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
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# directory is bind mounted. The former part represents the device path, rest
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# part is the bind mounted directory which quotes by bracket "[]".
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get_bind_mount_source()
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{
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local _mnt _path _src _opt _fstype
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local _fsroot _src_nofsroot
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_mnt=$(df "$1" | tail -1 | awk '{print $NF}')
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_path=${1#$_mnt}
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_src=$(get_mount_info SOURCE target "$_mnt" -f)
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_opt=$(get_mount_info OPTIONS target "$_mnt" -f)
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_fstype=$(get_mount_info FSTYPE target "$_mnt" -f)
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# bind mount in fstab
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if [[ -d $_src ]] && [[ $_fstype == none ]] && (echo "$_opt" | grep -q "\bbind\b"); then
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echo "$_src$_path" && return
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fi
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# direct mount
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_src_nofsroot=$(get_mount_info SOURCE target "$_mnt" -v -f)
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if [[ $_src_nofsroot == "$_src" ]]; then
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echo "$_mnt$_path" && return
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fi
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_fsroot=${_src#${_src_nofsroot}[}
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_fsroot=${_fsroot%]}
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_mnt=$(get_mount_info TARGET source "$_src_nofsroot" -f)
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# for btrfs, _fsroot will also contain the subvol value as well, strip it
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if [[ $_fstype == btrfs ]]; then
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local _subvol
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_subvol=${_opt#*subvol=}
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_subvol=${_subvol%,*}
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_fsroot=${_fsroot#$_subvol}
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fi
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echo "$_mnt$_fsroot$_path"
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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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# Get the path where the target will be mounted in kdump kernel
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# $1: kdump target device
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get_kdump_mntpoint_from_target()
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{
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local _mntpoint
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_mntpoint=$(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 $_mntpoint | tr -s "/"
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}
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kdump_get_persistent_dev()
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{
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local dev="${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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# 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
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_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 "$1" 2> /dev/null |
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awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
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"\\1", 1)); }'
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fi
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}
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# Get value by a field using "nmcli -g"
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# Usage: get_nmcli_value_by_field <field> <nmcli command>
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#
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# "nmcli --get-values" allows us to retrive value(s) by field, for example,
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# nmcli --get-values <field> connection show /org/freedesktop/NetworkManager/ActiveConnection/1
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# returns the following value for the corresponding field respectively,
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# Field Value
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# IP4.DNS "10.19.42.41 | 10.11.5.19 | 10.5.30.160"
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# 802-3-ethernet.s390-subchannels ""
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# bond.options "mode=balance-rr"
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get_nmcli_value_by_field()
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{
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LANG=C nmcli --get-values "$@"
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}
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# Get nmcli field value of an connection apath (a D-Bus active connection path)
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# Usage: get_nmcli_field_by_apath <field> <apath>
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get_nmcli_field_by_conpath()
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{
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local _field=$1 _apath=$2
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get_nmcli_value_by_field "$_field" connection show "$_apath"
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}
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# Get nmcli connection apath (a D-Bus active connection path ) by ifname
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#
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# apath is used for nmcli connection operations, e.g.
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# $ nmcli connection show $apath
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get_nmcli_connection_apath_by_ifname()
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{
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local _ifname=$1
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get_nmcli_value_by_field "GENERAL.CON-PATH" device show "$_ifname"
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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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# $1: netdev name
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get_ifcfg_legacy()
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{
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local ifcfg_file hwaddr
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ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${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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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 $1 if any.
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get_ifcfg_filename()
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{
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local ifcfg_file
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ifcfg_file=$(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 a module is desired in dracut_args
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# returns 1 otherwise
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is_dracut_mod_omitted()
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{
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local dracut_args dracut_mod=$1
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set -- $(kdump_get_conf_val dracut_args)
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while [ $# -gt 0 ]; do
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case $1 in
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-o | --omit)
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[[ " ${2//[^[:alnum:]]/ } " == *" $dracut_mod "* ]] && return 0
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;;
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esac
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shift
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done
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return 1
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}
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is_wdt_active()
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{
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local active
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[[ -d /sys/class/watchdog ]] || return 1
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for dir in /sys/class/watchdog/*; do
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[[ -f "$dir/state" ]] || continue
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active=$(< "$dir/state")
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[[ $active == "active" ]] && return 0
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done
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return 1
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}
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|
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have_compression_in_dracut_args()
|
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{
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|
[[ "$(kdump_get_conf_val dracut_args)" =~ (^|[[:space:]])--(gzip|bzip2|lzma|xz|lzo|lz4|zstd|no-compress|compress|squash-compressor)([[:space:]]|$) ]]
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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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[[ " $(kdump_get_conf_val dracut_args)" =~ .*[[:space:]]--mount[=[:space:]].* ]]
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}
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check_crash_mem_reserved()
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{
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local mem_reserved
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mem_reserved=$(< /sys/kernel/kexec_crash_size)
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if [[ $mem_reserved -eq 0 ]]; then
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derror "No memory reserved for crash kernel"
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return 1
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fi
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return 0
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}
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|
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check_kdump_feasibility()
|
|
{
|
|
if [[ ! -e /sys/kernel/kexec_crash_loaded ]]; then
|
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derror "Kdump is not supported on this kernel"
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return 1
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fi
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check_crash_mem_reserved
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return $?
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}
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|
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is_kernel_loaded()
|
|
{
|
|
local _sysfs _mode
|
|
|
|
_mode=$1
|
|
|
|
case "$_mode" in
|
|
kdump)
|
|
_sysfs="/sys/kernel/kexec_crash_loaded"
|
|
;;
|
|
fadump)
|
|
_sysfs="$FADUMP_REGISTER_SYS_NODE"
|
|
;;
|
|
*)
|
|
derror "Unknown dump mode '$_mode' provided"
|
|
return 1
|
|
;;
|
|
esac
|
|
|
|
if [[ ! -f $_sysfs ]]; then
|
|
derror "$_mode is not supported on this kernel"
|
|
return 1
|
|
fi
|
|
|
|
[[ $(< $_sysfs) -eq 1 ]]
|
|
}
|
|
|
|
# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
|
|
# Remove a list of kernel parameters from a given kernel cmdline and print the result.
|
|
# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
|
|
remove_cmdline_param()
|
|
{
|
|
local cmdline=$1
|
|
shift
|
|
|
|
for arg in "$@"; do
|
|
cmdline=$(echo "$cmdline" |
|
|
sed -e "s/\b$arg=[^ ]*//g" \
|
|
-e "s/^$arg\b//g" \
|
|
-e "s/[[:space:]]$arg\b//g" \
|
|
-e "s/\s\+/ /g")
|
|
done
|
|
echo "$cmdline"
|
|
}
|
|
|
|
#
|
|
# This function returns the "apicid" of the boot
|
|
# cpu (cpu 0) if present.
|
|
#
|
|
get_bootcpu_apicid()
|
|
{
|
|
awk ' \
|
|
BEGIN { CPU = "-1"; } \
|
|
$1=="processor" && $2==":" { CPU = $NF; } \
|
|
CPU=="0" && /^apicid/ { print $NF; } \
|
|
' \
|
|
/proc/cpuinfo
|
|
}
|
|
|
|
#
|
|
# append_cmdline <kernel cmdline> <parameter name> <parameter value>
|
|
# This function appends argument "$2=$3" to string ($1) if not already present.
|
|
#
|
|
append_cmdline()
|
|
{
|
|
local cmdline=$1
|
|
local newstr=${cmdline/$2/""}
|
|
|
|
# unchanged str implies argument wasn't there
|
|
if [[ $cmdline == "$newstr" ]]; then
|
|
cmdline="${cmdline} ${2}=${3}"
|
|
fi
|
|
|
|
echo "$cmdline"
|
|
}
|
|
|
|
# This function check iomem and determines if we have more than
|
|
# 4GB of ram available. Returns 1 if we do, 0 if we dont
|
|
need_64bit_headers()
|
|
{
|
|
return "$(tail -n 1 /proc/iomem | awk '{ split ($1, r, "-");
|
|
print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }')"
|
|
}
|
|
|
|
# Check if secure boot is being enforced.
|
|
#
|
|
# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
|
|
# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
|
|
# bytes are the attributes associated with the variable and can safely be
|
|
# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
|
|
# is 1 and SetupMode is 0, then secure boot is being enforced.
|
|
#
|
|
# Assume efivars is mounted at /sys/firmware/efi/efivars.
|
|
is_secure_boot_enforced()
|
|
{
|
|
local secure_boot_file setup_mode_file
|
|
local secure_boot_byte setup_mode_byte
|
|
|
|
# On powerpc, secure boot is enforced if:
|
|
# host secure boot: /ibm,secure-boot/os-secureboot-enforcing DT property exists
|
|
# guest secure boot: /ibm,secure-boot >= 2
|
|
if [[ -f /proc/device-tree/ibm,secureboot/os-secureboot-enforcing ]]; then
|
|
return 0
|
|
fi
|
|
if [[ -f /proc/device-tree/ibm,secure-boot ]] &&
|
|
[[ $(lsprop /proc/device-tree/ibm,secure-boot | tail -1) -ge 2 ]]; then
|
|
return 0
|
|
fi
|
|
|
|
# Detect secure boot on x86 and arm64
|
|
secure_boot_file=$(find /sys/firmware/efi/efivars -name "SecureBoot-*" 2> /dev/null)
|
|
setup_mode_file=$(find /sys/firmware/efi/efivars -name "SetupMode-*" 2> /dev/null)
|
|
|
|
if [[ -f $secure_boot_file ]] && [[ -f $setup_mode_file ]]; then
|
|
secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' "$secure_boot_file" | cut -d' ' -f 5)
|
|
setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' "$setup_mode_file" | cut -d' ' -f 5)
|
|
|
|
if [[ $secure_boot_byte == "1" ]] && [[ $setup_mode_byte == "0" ]]; then
|
|
return 0
|
|
fi
|
|
fi
|
|
|
|
# Detect secure boot on s390x
|
|
if [[ -e "/sys/firmware/ipl/secure" && "$(< /sys/firmware/ipl/secure)" == "1" ]]; then
|
|
return 0
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
#
|
|
# prepare_kexec_args <kexec args>
|
|
# This function prepares kexec argument.
|
|
#
|
|
prepare_kexec_args()
|
|
{
|
|
local kexec_args=$1
|
|
local found_elf_args
|
|
|
|
ARCH=$(uname -m)
|
|
if [[ $ARCH == "i686" ]] || [[ $ARCH == "i386" ]]; then
|
|
need_64bit_headers
|
|
if [[ $? == 1 ]]; then
|
|
found_elf_args=$(echo "$kexec_args" | grep elf32-core-headers)
|
|
if [[ -n $found_elf_args ]]; then
|
|
dwarn "Warning: elf32-core-headers overrides correct elf64 setting"
|
|
else
|
|
kexec_args="$kexec_args --elf64-core-headers"
|
|
fi
|
|
else
|
|
found_elf_args=$(echo "$kexec_args" | grep elf64-core-headers)
|
|
if [[ -z $found_elf_args ]]; then
|
|
kexec_args="$kexec_args --elf32-core-headers"
|
|
fi
|
|
fi
|
|
fi
|
|
echo "$kexec_args"
|
|
}
|
|
|
|
# prepare_kdump_kernel <kdump_kernelver>
|
|
# This function return kdump_kernel given a kernel version.
|
|
prepare_kdump_kernel()
|
|
{
|
|
local kdump_kernelver=$1
|
|
local dir img boot_dirlist boot_imglist kdump_kernel machine_id
|
|
read -r machine_id < /etc/machine-id
|
|
|
|
boot_dirlist=${KDUMP_BOOTDIR:-"/boot /boot/efi /efi /"}
|
|
boot_imglist="$KDUMP_IMG-$kdump_kernelver$KDUMP_IMG_EXT $machine_id/$kdump_kernelver/$KDUMP_IMG"
|
|
|
|
# The kernel of OSTree based systems is not in the standard locations.
|
|
if is_ostree; then
|
|
boot_dirlist="$(echo /boot/ostree/*) $boot_dirlist"
|
|
fi
|
|
|
|
# Use BOOT_IMAGE as reference if possible, strip the GRUB root device prefix in (hd0,gpt1) format
|
|
boot_img="$(grep -P -o '^BOOT_IMAGE=(\S+)' /proc/cmdline | sed "s/^BOOT_IMAGE=\((\S*)\)\?\(\S*\)/\2/")"
|
|
if [[ "$boot_img" == *"$kdump_kernelver" ]]; then
|
|
boot_imglist="$boot_img $boot_imglist"
|
|
fi
|
|
|
|
for dir in $boot_dirlist; do
|
|
for img in $boot_imglist; do
|
|
if [[ -f "$dir/$img" ]]; then
|
|
kdump_kernel=$(echo "$dir/$img" | tr -s '/')
|
|
break 2
|
|
fi
|
|
done
|
|
done
|
|
echo "$kdump_kernel"
|
|
}
|
|
|
|
_get_kdump_kernel_version()
|
|
{
|
|
local _version _version_nondebug
|
|
|
|
if [[ -n "$KDUMP_KERNELVER" ]]; then
|
|
echo "$KDUMP_KERNELVER"
|
|
return
|
|
fi
|
|
|
|
_version=$(uname -r)
|
|
if [[ ! "$_version" =~ \+debug$ ]]; then
|
|
echo "$_version"
|
|
return
|
|
fi
|
|
|
|
_version_nondebug=${_version%+debug}
|
|
if [[ -f "$(prepare_kdump_kernel "$_version_nondebug")" ]]; then
|
|
dinfo "Use of debug kernel detected. Trying to use $_version_nondebug"
|
|
echo "$_version_nondebug"
|
|
else
|
|
dinfo "Use of debug kernel detected but cannot find $_version_nondebug. Falling back to $_version"
|
|
echo "$_version"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Detect initrd and kernel location, results are stored in global environmental variables:
|
|
# KDUMP_BOOTDIR, KDUMP_KERNELVER, KDUMP_KERNEL, DEFAULT_INITRD, and KDUMP_INITRD
|
|
#
|
|
# Expectes KDUMP_BOOTDIR, KDUMP_IMG, KDUMP_IMG_EXT, KDUMP_KERNELVER to be loaded from config already
|
|
# and will prefer already set values so user can specify custom kernel/initramfs location
|
|
#
|
|
prepare_kdump_bootinfo()
|
|
{
|
|
local boot_initrdlist default_initrd_base var_target_initrd_dir
|
|
|
|
KDUMP_KERNELVER=$(_get_kdump_kernel_version)
|
|
KDUMP_KERNEL=$(prepare_kdump_kernel "$KDUMP_KERNELVER")
|
|
|
|
if ! [[ -e $KDUMP_KERNEL ]]; then
|
|
derror "Failed to detect kdump kernel location"
|
|
return 1
|
|
fi
|
|
|
|
if [[ "$KDUMP_KERNEL" == *"+debug" ]]; then
|
|
dwarn "Using debug kernel, you may need to set a larger crashkernel than the default value."
|
|
fi
|
|
|
|
# Set KDUMP_BOOTDIR to where kernel image is stored
|
|
KDUMP_BOOTDIR=$(dirname "$KDUMP_KERNEL")
|
|
|
|
# Default initrd should just stay aside of kernel image, try to find it in KDUMP_BOOTDIR
|
|
boot_initrdlist="initramfs-$KDUMP_KERNELVER.img initrd"
|
|
for initrd in $boot_initrdlist; do
|
|
if [[ -f "$KDUMP_BOOTDIR/$initrd" ]]; then
|
|
default_initrd_base="$initrd"
|
|
DEFAULT_INITRD="$KDUMP_BOOTDIR/$default_initrd_base"
|
|
break
|
|
fi
|
|
done
|
|
|
|
# Create kdump initrd basename from default initrd basename
|
|
# initramfs-5.7.9-200.fc32.x86_64.img => initramfs-5.7.9-200.fc32.x86_64kdump.img
|
|
# initrd => initrdkdump
|
|
if [[ -z $default_initrd_base ]]; then
|
|
kdump_initrd_base=initramfs-${KDUMP_KERNELVER}kdump.img
|
|
elif [[ $default_initrd_base == *.* ]]; then
|
|
kdump_initrd_base=${default_initrd_base%.*}kdump.${DEFAULT_INITRD##*.}
|
|
else
|
|
kdump_initrd_base=${default_initrd_base}kdump
|
|
fi
|
|
|
|
# Place kdump initrd in $(/var/lib/kdump) if $(KDUMP_BOOTDIR) not writable
|
|
if [[ ! -w $KDUMP_BOOTDIR ]]; then
|
|
var_target_initrd_dir="/var/lib/kdump"
|
|
mkdir -p "$var_target_initrd_dir"
|
|
KDUMP_INITRD="$var_target_initrd_dir/$kdump_initrd_base"
|
|
else
|
|
KDUMP_INITRD="$KDUMP_BOOTDIR/$kdump_initrd_base"
|
|
fi
|
|
}
|
|
|
|
get_watchdog_drvs()
|
|
{
|
|
local _wdtdrvs _drv _dir
|
|
|
|
for _dir in /sys/class/watchdog/*; do
|
|
# device/modalias will return driver of this device
|
|
[[ -f "$_dir/device/modalias" ]] || continue
|
|
_drv=$(< "$_dir/device/modalias")
|
|
_drv=$(modprobe --set-version "$KDUMP_KERNELVER" -R "$_drv" 2> /dev/null)
|
|
for i in $_drv; do
|
|
if ! [[ " $_wdtdrvs " == *" $i "* ]]; then
|
|
_wdtdrvs="$_wdtdrvs $i"
|
|
fi
|
|
done
|
|
done
|
|
|
|
echo "$_wdtdrvs"
|
|
}
|
|
|
|
#
|
|
# prepare_cmdline <commandline> <commandline remove> <commandline append>
|
|
# This function performs a series of edits on the command line.
|
|
# Store the final result in global $KDUMP_COMMANDLINE.
|
|
prepare_cmdline()
|
|
{
|
|
local cmdline id arg
|
|
|
|
if [[ -z $1 ]]; then
|
|
cmdline=$(< /proc/cmdline)
|
|
else
|
|
cmdline="$1"
|
|
fi
|
|
|
|
# These params should always be removed
|
|
cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
|
|
# These params can be removed configurably
|
|
while read -r arg; do
|
|
cmdline=$(remove_cmdline_param "$cmdline" "$arg")
|
|
done <<< "$(echo "$2" | xargs -n 1 echo)"
|
|
|
|
# Always remove "root=X", as we now explicitly generate all kinds
|
|
# of dump target mount information including root fs.
|
|
#
|
|
# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
|
|
# about it(e.g. for debug purpose), then can pass "root=X" using
|
|
# KDUMP_COMMANDLINE_APPEND.
|
|
cmdline=$(remove_cmdline_param "$cmdline" root)
|
|
|
|
# With the help of "--hostonly-cmdline", we can avoid some interitage.
|
|
cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid rd.md.uuid fcoe)
|
|
|
|
# Remove netroot, rd.iscsi.initiator and iscsi_initiator since
|
|
# we get duplicate entries for the same in case iscsi code adds
|
|
# it as well.
|
|
cmdline=$(remove_cmdline_param "$cmdline" netroot rd.iscsi.initiator iscsi_initiator)
|
|
|
|
cmdline="${cmdline} $3"
|
|
|
|
id=$(get_bootcpu_apicid)
|
|
if [[ -n ${id} ]]; then
|
|
cmdline=$(append_cmdline "$cmdline" disable_cpu_apicid "$id")
|
|
fi
|
|
|
|
# If any watchdog is used, set it's pretimeout to 0. pretimeout let
|
|
# watchdog panic the kernel first, and reset the system after the
|
|
# panic. If the system is already in kdump, panic is not helpful
|
|
# and only increase the chance of watchdog failure.
|
|
for i in $(get_watchdog_drvs); do
|
|
cmdline+=" $i.pretimeout=0"
|
|
|
|
if [[ $i == hpwdt ]]; then
|
|
# hpwdt have a special parameter kdumptimeout, is's only suppose
|
|
# to be set to non-zero in first kernel. In kdump, non-zero
|
|
# value could prevent the watchdog from resetting the system.
|
|
cmdline+=" $i.kdumptimeout=0"
|
|
fi
|
|
done
|
|
|
|
# This is a workaround on AWS platform. Always remove irqpoll since it
|
|
# may cause the hot-remove of some pci hotplug device.
|
|
is_aws_aarch64 && cmdline=$(remove_cmdline_param "${cmdline}" irqpoll)
|
|
|
|
echo "$cmdline"
|
|
}
|
|
|
|
PROC_IOMEM=/proc/iomem
|
|
#get system memory size i.e. memblock.memory.total_size in the unit of GB
|
|
get_system_size()
|
|
{
|
|
sum=$(sed -n "s/\s*\([0-9a-fA-F]\+\)-\([0-9a-fA-F]\+\) : System RAM$/+ 0x\2 - 0x\1 + 1/p" $PROC_IOMEM)
|
|
echo $(( (sum) / 1024 / 1024 / 1024))
|
|
}
|
|
|
|
# Return the recommended size for the reserved crashkernel memory
|
|
# depending on the system memory size.
|
|
#
|
|
# This functions is expected to be consistent with the parse_crashkernel_mem()
|
|
# in kernel i.e. how kernel allocates the kdump memory given the crashkernel
|
|
# parameter crashkernel=range1:size1[,range2:size2,…] and the system memory
|
|
# size.
|
|
get_recommend_size()
|
|
{
|
|
local mem_size=$1
|
|
local _ck_cmdline=$2
|
|
local range start start_unit end end_unit size
|
|
|
|
while read -r -d , range; do
|
|
# need to use non-default IFS as double spaces are used as a
|
|
# single delimiter while commas aren't...
|
|
IFS=, read start start_unit end end_unit size <<< \
|
|
"$(echo "$range" | sed -n "s/\([0-9]\+\)\([GT]\?\)-\([0-9]*\)\([GT]\?\):\([0-9]\+[MG]\)/\1,\2,\3,\4,\5/p")"
|
|
|
|
# aka. 102400T
|
|
end=${end:-104857600}
|
|
[[ "$end_unit" == T ]] && end=$((end * 1024))
|
|
[[ "$start_unit" == T ]] && start=$((start * 1024))
|
|
|
|
if [[ $mem_size -ge $start ]] && [[ $mem_size -lt $end ]]; then
|
|
echo "$size"
|
|
return
|
|
fi
|
|
|
|
# append a ',' as read expects the 'file' to end with a delimiter
|
|
done <<< "$_ck_cmdline,"
|
|
|
|
# no matching range found
|
|
echo "0M"
|
|
}
|
|
|
|
# get default crashkernel
|
|
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable
|
|
kdump_get_arch_recommend_crashkernel()
|
|
{
|
|
local _arch _ck_cmdline _dump_mode
|
|
|
|
if [[ -z "$1" ]]; then
|
|
if is_fadump_capable; then
|
|
_dump_mode=fadump
|
|
else
|
|
_dump_mode=kdump
|
|
fi
|
|
else
|
|
_dump_mode=$1
|
|
fi
|
|
|
|
_arch=$(uname -m)
|
|
|
|
if [[ $_arch == "x86_64" ]] || [[ $_arch == "s390x" ]]; then
|
|
_ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M"
|
|
elif [[ $_arch == "aarch64" ]]; then
|
|
# For 4KB page size, the formula is based on x86 plus extra = 64M
|
|
_ck_cmdline="1G-4G:256M,4G-64G:320M,64G-:576M"
|
|
elif [[ $_arch == "ppc64le" ]]; then
|
|
if [[ $_dump_mode == "fadump" ]]; then
|
|
_ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G"
|
|
else
|
|
_ck_cmdline="2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G"
|
|
fi
|
|
fi
|
|
|
|
echo -n "$_ck_cmdline"
|
|
}
|
|
|
|
# return recommended size based on current system RAM size
|
|
# $1: kernel version, if not set, will defaults to $(uname -r)
|
|
kdump_get_arch_recommend_size()
|
|
{
|
|
local _ck_cmdline _sys_mem
|
|
|
|
if ! [[ -r "/proc/iomem" ]]; then
|
|
echo "Error, can not access /proc/iomem."
|
|
return 1
|
|
fi
|
|
_sys_mem=$(get_system_size)
|
|
_ck_cmdline=$(kdump_get_arch_recommend_crashkernel)
|
|
_ck_cmdline=${_ck_cmdline//-:/-102400T:}
|
|
get_recommend_size "$_sys_mem" "$_ck_cmdline"
|
|
}
|
|
|
|
# Print all underlying crypt devices of a block device
|
|
# print nothing if device is not on top of a crypt device
|
|
# $1: the block device to be checked in maj:min format
|
|
get_luks_crypt_dev()
|
|
{
|
|
local _type
|
|
|
|
[[ -b /dev/block/$1 ]] || return 1
|
|
|
|
_type=$(blkid -u filesystem,crypto -o export -- "/dev/block/$1" | \
|
|
sed -n -E "s/^TYPE=(.*)$/\1/p")
|
|
[[ $_type == "crypto_LUKS" ]] && echo "$1"
|
|
|
|
for _x in "/sys/dev/block/$1/slaves/"*; do
|
|
[[ -f $_x/dev ]] || continue
|
|
[[ $_x/subsystem -ef /sys/class/block ]] || continue
|
|
get_luks_crypt_dev "$(< "$_x/dev")"
|
|
done
|
|
}
|
|
|
|
# kdump_get_maj_min <device>
|
|
# Prints the major and minor of a device node.
|
|
# Example:
|
|
# $ get_maj_min /dev/sda2
|
|
# 8:2
|
|
kdump_get_maj_min()
|
|
{
|
|
local _majmin
|
|
_majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)"
|
|
printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))"
|
|
}
|
|
|
|
get_all_kdump_crypt_dev()
|
|
{
|
|
local _dev
|
|
|
|
for _dev in $(get_block_dump_target); do
|
|
get_luks_crypt_dev "$(kdump_get_maj_min "$_dev")"
|
|
done
|
|
}
|
|
|
|
check_vmlinux()
|
|
{
|
|
# Use readelf to check if it's a valid ELF
|
|
readelf -h "$1" &> /dev/null || return 1
|
|
}
|
|
|
|
get_vmlinux_size()
|
|
{
|
|
local size=0 _msize
|
|
|
|
while read -r _msize; do
|
|
size=$((size + _msize))
|
|
done <<< "$(readelf -l -W "$1" | awk '/^ LOAD/{print $6}' 2> /dev/stderr)"
|
|
|
|
echo $size
|
|
}
|
|
|
|
try_decompress()
|
|
{
|
|
# The obscure use of the "tr" filter is to work around older versions of
|
|
# "grep" that report the byte offset of the line instead of the pattern.
|
|
|
|
# Try to find the header ($1) and decompress from here
|
|
for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"); do
|
|
if ! type -P "$3" > /dev/null; then
|
|
ddebug "Signiature detected but '$3' is missing, skip this decompressor"
|
|
break
|
|
fi
|
|
|
|
pos=${pos%%:*}
|
|
tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null
|
|
if check_vmlinux "$5"; then
|
|
ddebug "Kernel is extracted with '$3'"
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 1
|
|
}
|
|
|
|
# Borrowed from linux/scripts/extract-vmlinux
|
|
get_kernel_size()
|
|
{
|
|
# Prepare temp files:
|
|
local tmp img=$1
|
|
|
|
tmp=$(mktemp /tmp/vmlinux-XXX)
|
|
trap 'rm -f "$tmp"' 0
|
|
|
|
# Try to check if it's a vmlinux already
|
|
check_vmlinux "$img" && get_vmlinux_size "$img" && return 0
|
|
|
|
# That didn't work, so retry after decompression.
|
|
try_decompress '\037\213\010' xy gunzip "$img" "$tmp" ||
|
|
try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" ||
|
|
try_decompress 'BZh' xy bunzip2 "$img" "$tmp" ||
|
|
try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" ||
|
|
try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" ||
|
|
try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" ||
|
|
try_decompress '(\265/\375' xxx unzstd "$img" "$tmp"
|
|
|
|
# Finally check for uncompressed images or objects:
|
|
[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0
|
|
|
|
# Fallback to use iomem
|
|
local _size=0 _seg
|
|
while read -r _seg; do
|
|
_size=$((_size + 0x${_seg#*-} - 0x${_seg%-*}))
|
|
done <<< "$(grep -E "Kernel (code|rodata|data|bss)" /proc/iomem | cut -d ":" -f 1)"
|
|
echo $_size
|
|
}
|