75d9132417
When reading kdump configs, a single parsing should be enough and this saves a lot of duplicated striping call which speed up the total load speed. Speed up about 2 second when building and 0.1 second for reload in my tests. Signed-off-by: Kairui Song <kasong@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
718 lines
18 KiB
Bash
Executable File
718 lines
18 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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FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
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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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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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# 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 $_target
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}
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get_root_fs_device()
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{
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local _target
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_target=$(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 $_target)
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}
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is_dump_to_rootfs()
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{
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grep -E "^(failure_action|default)[[:space:]]dump_to_rootfs" /etc/kdump.conf >/dev/null
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}
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get_failure_action_target()
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{
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local _target
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if is_dump_to_rootfs; then
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# Get rootfs device name
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_target=$(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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# 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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check_crash_mem_reserved()
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{
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local mem_reserved
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mem_reserved=$(cat /sys/kernel/kexec_crash_size)
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if [ $mem_reserved -eq 0 ]; then
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echo "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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check_kdump_feasibility()
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{
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if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
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echo "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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check_current_kdump_status()
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{
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if [ ! -f /sys/kernel/kexec_crash_loaded ];then
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echo "Perhaps CONFIG_CRASH_DUMP is not enabled in kernel"
|
|
return 1
|
|
fi
|
|
|
|
rc=`cat /sys/kernel/kexec_crash_loaded`
|
|
if [ $rc == 1 ]; then
|
|
return 0
|
|
else
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
# 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-$(the UUID), they are both 5 bytes binary data. The first four
|
|
# bytes are the attributes associated with the variable and can safely be
|
|
# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
|
|
# is 1 and SetupMode is 0, then secure boot is being enforced.
|
|
#
|
|
# Assume efivars is mounted at /sys/firmware/efi/efivars.
|
|
is_secure_boot_enforced()
|
|
{
|
|
local secure_boot_file setup_mode_file
|
|
local secure_boot_byte setup_mode_byte
|
|
|
|
secure_boot_file=$(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
|
|
|
|
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" -o "$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
|
|
echo -n "Warning: elf32-core-headers overrides correct elf64 setting"
|
|
echo
|
|
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
|
|
}
|
|
|
|
check_boot_dir()
|
|
{
|
|
local kdump_bootdir=$1
|
|
#If user specify a boot dir for kdump kernel, let's use it. Otherwise
|
|
#check whether it's a atomic host. If yes parse the subdirectory under
|
|
#/boot; If not just find it under /boot.
|
|
if [ -n "$kdump_bootdir" ]; then
|
|
echo "$kdump_bootdir"
|
|
return
|
|
fi
|
|
|
|
if ! is_atomic || [ "$(uname -m)" = "s390x" ]; then
|
|
kdump_bootdir="/boot"
|
|
else
|
|
eval $(cat /proc/cmdline| grep "BOOT_IMAGE" | cut -d' ' -f1)
|
|
kdump_bootdir="/boot"$(dirname $BOOT_IMAGE)
|
|
fi
|
|
echo $kdump_bootdir
|
|
}
|
|
|
|
#
|
|
# 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
|
|
|
|
if [ -z "$1" ]; then
|
|
cmdline=$(cat /proc/cmdline)
|
|
else
|
|
cmdline="$1"
|
|
fi
|
|
|
|
# These params should always be removed
|
|
cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
|
|
# These params can be removed configurably
|
|
cmdline=$(remove_cmdline_param "$cmdline" "$2")
|
|
|
|
# Always remove "root=X", as we now explicitly generate all kinds
|
|
# of dump target mount information including root fs.
|
|
#
|
|
# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
|
|
# about it(e.g. for debug purpose), then can pass "root=X" using
|
|
# KDUMP_COMMANDLINE_APPEND.
|
|
cmdline=$(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 [ ! -z ${id} ] ; then
|
|
cmdline=$(append_cmdline "${cmdline}" disable_cpu_apicid ${id})
|
|
fi
|
|
echo ${cmdline}
|
|
}
|