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kdump
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kdump-lib.sh
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#!/bin/sh # # Kdump common variables and functions # DEFAULT_PATH="/var/crash/" FENCE_KDUMP_CONFIG_FILE="/etc/sysconfig/fence_kdump" FENCE_KDUMP_SEND="/usr/libexec/fence_kdump_send" FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled" is_fadump_capable() { # Check if firmware-assisted dump is enabled # if no, fallback to kdump check if [ -f $FADUMP_ENABLED_SYS_NODE ]; then rc=`cat $FADUMP_ENABLED_SYS_NODE` [ $rc -eq 1 ] && return 0 fi return 1 } perror_exit() { echo $@ >&2 exit 1 } perror() { echo $@ >&2 } is_ssh_dump_target() { grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf } is_nfs_dump_target() { grep -q "^nfs" /etc/kdump.conf || \ [[ $(get_dracut_args_fstype "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)") = nfs* ]] } is_raw_dump_target() { grep -q "^raw" /etc/kdump.conf } is_fs_type_nfs() { local _fstype=$1 [ $_fstype = "nfs" ] || [ $_fstype = "nfs4" ] && return 0 return 1 } is_fs_dump_target() { egrep -q "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf } strip_comments() { echo $@ | sed -e 's/\(.*\)#.*/\1/' } # Read from kdump config file stripping all comments read_strip_comments() { # strip heading spaces, and print any content starting with # neither space or #, and strip everything after # sed -n -e "s/^\s*\([^# \t][^#]\+\).*/\1/gp" $1 } # Check if fence kdump is configured in Pacemaker cluster is_pcs_fence_kdump() { # no pcs or fence_kdump_send executables installed? type -P pcs > /dev/null || return 1 [ -x $FENCE_KDUMP_SEND ] || return 1 # fence kdump not configured? (pcs cluster cib | grep 'type="fence_kdump"') &> /dev/null || return 1 } # Check if fence_kdump is configured using kdump options is_generic_fence_kdump() { [ -x $FENCE_KDUMP_SEND ] || return 1 grep -q "^fence_kdump_nodes" /etc/kdump.conf } to_dev_name() { local dev="${1//\"/}" case "$dev" in UUID=*) dev=`blkid -U "${dev#UUID=}"` ;; LABEL=*) dev=`blkid -L "${dev#LABEL=}"` ;; esac echo $dev } is_user_configured_dump_target() { return $(is_mount_in_dracut_args || is_ssh_dump_target || is_nfs_dump_target || \ is_raw_dump_target || is_fs_dump_target) } get_user_configured_dump_disk() { local _target _target=$(egrep "^ext[234]|^xfs|^btrfs|^minix|^raw" /etc/kdump.conf 2>/dev/null |awk '{print $2}') [ -n "$_target" ] && echo $_target && return _target=$(get_dracut_args_target "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)") [ -b "$_target" ] && echo $_target } get_root_fs_device() { local _target _target=$(findmnt -k -f -n -o SOURCE /) [ -n "$_target" ] && echo $_target return } get_save_path() { local _save_path=$(grep "^path" /etc/kdump.conf|awk '{print $2}') if [ -z "$_save_path" ]; then _save_path=$DEFAULT_PATH fi echo $_save_path } get_block_dump_target() { local _target _path if is_ssh_dump_target || is_nfs_dump_target; then return fi _target=$(get_user_configured_dump_disk) [ -n "$_target" ] && echo $(to_dev_name $_target) && return # Get block device name from local save path _path=$(get_save_path) _target=$(get_target_from_path $_path) [ -b "$_target" ] && echo $(to_dev_name $_target) } is_dump_to_rootfs() { grep -E "^(failure_action|default)[[:space:]]dump_to_rootfs" /etc/kdump.conf >/dev/null } get_failure_action_target() { local _target if is_dump_to_rootfs; then # Get rootfs device name _target=$(get_root_fs_device) [ -b "$_target" ] && echo $(to_dev_name $_target) && return # Then, must be nfs root echo "nfs" fi } # Get kdump targets(including root in case of dump_to_rootfs). get_kdump_targets() { local _target _root local kdump_targets _target=$(get_block_dump_target) if [ -n "$_target" ]; then kdump_targets=$_target elif is_ssh_dump_target; then kdump_targets="ssh" else kdump_targets="nfs" fi # Add the root device if dump_to_rootfs is specified. _root=$(get_failure_action_target) if [ -n "$_root" -a "$kdump_targets" != "$_root" ]; then kdump_targets="$kdump_targets $_root" fi echo "$kdump_targets" } # findmnt uses the option "-v, --nofsroot" to exclusive the [/dir] # in the SOURCE column for bind-mounts, then if $_mntpoint equals to # $_mntpoint_nofsroot, the mountpoint is not bind mounted directory. is_bind_mount() { local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}') local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}') if [[ $_mntpoint = $_mntpoint_nofsroot ]]; then return 1 else return 0 fi } # Below is just an example for mount info # /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the # directory is bind mounted. The former part represents the device path, rest # part is the bind mounted directory which quotes by bracket "[]". get_bind_mount_directory() { local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}') local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}') _mntpoint=${_mntpoint#*$_mntpoint_nofsroot} _mntpoint=${_mntpoint#[} _mntpoint=${_mntpoint%]} echo $_mntpoint } get_mntpoint_from_path() { echo $(df $1 | tail -1 | awk '{print $NF}') } get_target_from_path() { local _target _target=$(df $1 2>/dev/null | tail -1 | awk '{print $1}') [[ "$_target" == "/dev/root" ]] && [[ ! -e /dev/root ]] && _target=$(get_root_fs_device) echo $_target } get_fs_type_from_target() { echo $(findmnt -k -f -n -r -o FSTYPE $1) } # input: device path # output: the general mount point # find the general mount point, not the bind mounted point in atomic # As general system, Use the previous code # # ERROR and EXIT: # the device can be umounted the general mount point, if one of the mount point is bind mounted # For example: # mount /dev/sda /mnt/ # mount -o bind /mnt/var /var # umount /mnt get_mntpoint_from_target() { if is_atomic; then for _mnt in $(findmnt -k -n -r -o TARGET $1) do if ! is_bind_mount $_mnt; then echo $_mnt return fi done echo "Mount $1 firstly, without the bind mode" >&2 exit 1 else echo $(findmnt -k -f -n -r -o TARGET $1) fi } # get_option_value <option_name> # retrieves value of option defined in kdump.conf get_option_value() { echo $(strip_comments `grep "^$1[[:space:]]\+" /etc/kdump.conf | tail -1 | cut -d\ -f2-`) } #This function compose a absolute path with the mount #point and the relative $SAVE_PATH. #target is passed in as argument, could be UUID, LABEL, #block device or even nfs server export of the form of #"my.server.com:/tmp/export"? #And possibly this could be used for both default case #as well as when dump taret is specified. When dump #target is not specified, then $target would be null. make_absolute_save_path() { local _target=$1 local _mnt [ -n $_target ] && _mnt=$(get_mntpoint_from_target $1) _mnt="${_mnt}/$SAVE_PATH" # strip the duplicated "/" echo "$_mnt" | tr -s / } check_save_path_fs() { local _path=$1 if [ ! -d $_path ]; then perror_exit "Dump path $_path does not exist." fi } is_atomic() { grep -q "ostree" /proc/cmdline } # fixme, try the best to decide whether the ipv6 addr is allocated by slaac or dhcp6 is_ipv6_auto() { local _netdev=$1 local _auto=$(cat /proc/sys/net/ipv6/conf/$_netdev/autoconf) if [ $_auto -eq 1 ]; then return 0 else return 1 fi } is_ipv6_address() { echo $1 | grep -q ":" } # get ip address or hostname from nfs/ssh config value get_remote_host() { local _config_val=$1 # ipv6 address in kdump.conf is around with "[]", # factor out the ipv6 address _config_val=${_config_val#*@} _config_val=${_config_val%:/*} _config_val=${_config_val#[} _config_val=${_config_val%]} echo $_config_val } is_hostname() { local _hostname=`echo $1 | grep ":"` if [ -n "$_hostname" ]; then return 1 fi echo $1 | grep -q "[a-zA-Z]" } # Copied from "/etc/sysconfig/network-scripts/network-functions" get_hwaddr() { if [ -f "/sys/class/net/${1}/address" ]; then awk '{ print toupper($0) }' < /sys/class/net/${1}/address elif [ -d "/sys/class/net/${1}" ]; then LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \ awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/, "\\1", 1)); }' fi } get_ifcfg_by_device() { grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \ /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 } get_ifcfg_by_hwaddr() { grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \ /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 } get_ifcfg_by_uuid() { grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \ /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 } get_ifcfg_by_name() { grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \ /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 } is_nm_running() { [ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" = "running" ] } is_nm_handling() { LANG=C nmcli -t --fields device,state dev status 2>/dev/null \ | grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$" } # $1: netdev name get_ifcfg_nmcli() { local nm_uuid nm_name local ifcfg_file # Get the active nmcli config name of $1 if is_nm_running && is_nm_handling "${1}" ; then # The configuration "uuid" and "name" generated by nm is wrote to # the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>". nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2>/dev/null \ | grep "${1}" | head -1 | cut -d':' -f1) nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2>/dev/null \ | grep "${1}" | head -1 | cut -d':' -f1) ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}") [ -z "${ifcfg_file}" ] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}") fi echo -n "${ifcfg_file}" } # $1: netdev name get_ifcfg_legacy() { local ifcfg_file ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}" [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return ifcfg_file=$(get_ifcfg_by_name "${1}") [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return local hwaddr=$(get_hwaddr "${1}") if [ -n "$hwaddr" ]; then ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}") [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return fi ifcfg_file=$(get_ifcfg_by_device "${1}") echo -n "${ifcfg_file}" } # $1: netdev name # Return the ifcfg file whole name(including the path) of $1 if any. get_ifcfg_filename() { local ifcfg_file ifcfg_file=$(get_ifcfg_nmcli "${1}") if [ -z "${ifcfg_file}" ]; then ifcfg_file=$(get_ifcfg_legacy "${1}") fi echo -n "${ifcfg_file}" } # returns 0 when omission of watchdog module is desired in dracut_args # returns 1 otherwise is_wdt_mod_omitted() { local dracut_args local ret=1 dracut_args=$(grep "^dracut_args" /etc/kdump.conf) [[ -z $dracut_args ]] && return $ret eval set -- $dracut_args while :; do [[ -z $1 ]] && break case $1 in -o|--omit) echo $2 | grep -qw "watchdog" [[ $? == 0 ]] && ret=0 break esac shift done return $ret } # If "dracut_args" contains "--mount" information, use it # directly without any check(users are expected to ensure # its correctness). is_mount_in_dracut_args() { grep -q "^dracut_args .*\-\-mount" /etc/kdump.conf } # If $1 contains dracut_args "--mount", return <filesystem type> get_dracut_args_fstype() { echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3 } # If $1 contains dracut_args "--mount", return <device> get_dracut_args_target() { echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1 } check_crash_mem_reserved() { local mem_reserved mem_reserved=$(cat /sys/kernel/kexec_crash_size) if [ $mem_reserved -eq 0 ]; then echo "No memory reserved for crash kernel" return 1 fi return 0 } check_kdump_feasibility() { if [ ! -e /sys/kernel/kexec_crash_loaded ]; then echo "Kdump is not supported on this kernel" return 1 fi check_crash_mem_reserved return $? } check_current_kdump_status() { if [ ! -f /sys/kernel/kexec_crash_loaded ];then 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} }
/home/../lib/python3.6/site-packages/../../kdump/kdump-lib.sh