move some common functions from kdumpctl to kdump-lib.sh
we move some common functions from kdumpctl to kdump-lib.sh, the functions could be used in other modules, such as early kdump. It has no bad effect. Signed-off-by: Lianbo Jiang <lijiang@redhat.com> Reviewed-by: Kazuhito Hagio <khagio@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Lianbo Jiang
Dave Young
parent
3578c54ff2
commit
b1fbeebd08
222
kdump-lib.sh
222
kdump-lib.sh
@ -485,3 +485,225 @@ 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"
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return 1
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fi
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rc=`cat /sys/kernel/kexec_crash_loaded`
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if [ $rc == 1 ]; then
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return 0
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else
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return 1
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fi
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}
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# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
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# Remove a list of kernel parameters from a given kernel cmdline and print the result.
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# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
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remove_cmdline_param()
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{
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local cmdline=$1
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shift
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for arg in $@; do
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cmdline=`echo $cmdline | \
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sed -e "s/\b$arg=[^ ]*//g" \
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-e "s/^$arg\b//g" \
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-e "s/[[:space:]]$arg\b//g" \
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-e "s/\s\+/ /g"`
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done
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echo $cmdline
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}
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#
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# This function returns the "apicid" of the boot
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# cpu (cpu 0) if present.
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#
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get_bootcpu_apicid()
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{
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awk ' \
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BEGIN { CPU = "-1"; } \
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$1=="processor" && $2==":" { CPU = $NF; } \
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CPU=="0" && /^apicid/ { print $NF; } \
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' \
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/proc/cpuinfo
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}
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#
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# append_cmdline <kernel cmdline> <parameter name> <parameter value>
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# This function appends argument "$2=$3" to string ($1) if not already present.
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#
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append_cmdline()
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{
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local cmdline=$1
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local newstr=${cmdline/$2/""}
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# unchanged str implies argument wasn't there
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if [ "$cmdline" == "$newstr" ]; then
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cmdline="${cmdline} ${2}=${3}"
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fi
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echo $cmdline
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}
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# This function check iomem and determines if we have more than
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# 4GB of ram available. Returns 1 if we do, 0 if we dont
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need_64bit_headers()
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{
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return `tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); \
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print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }'`
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}
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# Check if secure boot is being enforced.
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#
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# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
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# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
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# bytes are the attributes associated with the variable and can safely be
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# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
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# is 1 and SetupMode is 0, then secure boot is being enforced.
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#
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# Assume efivars is mounted at /sys/firmware/efi/efivars.
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is_secure_boot_enforced()
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{
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local secure_boot_file setup_mode_file
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local secure_boot_byte setup_mode_byte
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secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-* 2>/dev/null)
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setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-* 2>/dev/null)
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if [ -f "$secure_boot_file" ] && [ -f "$setup_mode_file" ]; then
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secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' $secure_boot_file|cut -d' ' -f 5)
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setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' $setup_mode_file|cut -d' ' -f 5)
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if [ "$secure_boot_byte" = "1" ] && [ "$setup_mode_byte" = "0" ]; then
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return 0
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fi
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fi
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return 1
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}
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#
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# prepare_kexec_args <kexec args>
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# This function prepares kexec argument.
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#
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prepare_kexec_args()
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{
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local kexec_args=$1
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local found_elf_args
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ARCH=`uname -m`
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if [ "$ARCH" == "i686" -o "$ARCH" == "i386" ]
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then
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need_64bit_headers
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if [ $? == 1 ]
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then
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found_elf_args=`echo $kexec_args | grep elf32-core-headers`
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if [ -n "$found_elf_args" ]
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then
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echo -n "Warning: elf32-core-headers overrides correct elf64 setting"
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echo
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else
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kexec_args="$kexec_args --elf64-core-headers"
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fi
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else
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found_elf_args=`echo $kexec_args | grep elf64-core-headers`
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if [ -z "$found_elf_args" ]
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then
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kexec_args="$kexec_args --elf32-core-headers"
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fi
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fi
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fi
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echo $kexec_args
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}
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check_boot_dir()
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{
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local kdump_bootdir=$1
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#If user specify a boot dir for kdump kernel, let's use it. Otherwise
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#check whether it's a atomic host. If yes parse the subdirectory under
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#/boot; If not just find it under /boot.
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if [ -n "$kdump_bootdir" ]; then
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echo "$kdump_bootdir"
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return
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fi
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if ! is_atomic || [ "$(uname -m)" = "s390x" ]; then
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kdump_bootdir="/boot"
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else
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eval $(cat /proc/cmdline| grep "BOOT_IMAGE" | cut -d' ' -f1)
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kdump_bootdir="/boot"$(dirname $BOOT_IMAGE)
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fi
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echo $kdump_bootdir
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}
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#
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# prepare_cmdline <commandline> <commandline remove> <commandline append>
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# This function performs a series of edits on the command line.
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# Store the final result in global $KDUMP_COMMANDLINE.
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prepare_cmdline()
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{
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local cmdline id
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if [ -z "$1" ]; then
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cmdline=$(cat /proc/cmdline)
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else
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cmdline="$1"
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fi
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# These params should always be removed
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cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
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# These params can be removed configurably
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cmdline=$(remove_cmdline_param "$cmdline" "$2")
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# Always remove "root=X", as we now explicitly generate all kinds
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# of dump target mount information including root fs.
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#
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# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
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# about it(e.g. for debug purpose), then can pass "root=X" using
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# KDUMP_COMMANDLINE_APPEND.
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cmdline=$(remove_cmdline_param "$cmdline" root)
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# With the help of "--hostonly-cmdline", we can avoid some interitage.
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cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid rd.md.uuid fcoe)
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# Remove netroot, rd.iscsi.initiator and iscsi_initiator since
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# we get duplicate entries for the same in case iscsi code adds
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# it as well.
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cmdline=$(remove_cmdline_param "$cmdline" netroot rd.iscsi.initiator iscsi_initiator)
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cmdline="${cmdline} $3"
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id=$(get_bootcpu_apicid)
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if [ ! -z ${id} ] ; then
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cmdline=$(append_cmdline "${cmdline}" disable_cpu_apicid ${id})
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fi
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echo ${cmdline}
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}
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211
kdumpctl
211
kdumpctl
@ -62,98 +62,6 @@ determine_dump_mode()
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fi
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}
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# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
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# Remove a list of kernel parameters from a given kernel cmdline and print the result.
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# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
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remove_cmdline_param()
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{
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local cmdline=$1
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shift
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for arg in $@; do
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cmdline=`echo $cmdline | \
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sed -e "s/\b$arg=[^ ]*//g" \
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-e "s/^$arg\b//g" \
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-e "s/[[:space:]]$arg\b//g" \
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-e "s/\s\+/ /g"`
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done
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echo $cmdline
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}
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#
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# This function returns the "apicid" of the boot
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# cpu (cpu 0) if present.
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#
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get_bootcpu_apicid()
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{
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awk ' \
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BEGIN { CPU = "-1"; } \
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$1=="processor" && $2==":" { CPU = $NF; } \
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CPU=="0" && /^apicid/ { print $NF; } \
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' \
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/proc/cpuinfo
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}
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#
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# This function appends argument "$2=$3" to string ($1) if not already present.
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#
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append_cmdline()
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{
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local cmdline=$1
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local newstr=${cmdline/$2/""}
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# unchanged str implies argument wasn't there
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if [ "$cmdline" == "$newstr" ]; then
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cmdline="${cmdline} ${2}=${3}"
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fi
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echo $cmdline
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}
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# This function performs a series of edits on the command line.
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# Store the final result in global $KDUMP_COMMANDLINE.
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prepare_cmdline()
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{
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local cmdline id
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if [ -z "$KDUMP_COMMANDLINE" ]; then
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cmdline=$(cat /proc/cmdline)
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else
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cmdline=${KDUMP_COMMANDLINE}
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fi
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# These params should always be removed
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cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
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# These params can be removed configurably
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cmdline=$(remove_cmdline_param "$cmdline" ${KDUMP_COMMANDLINE_REMOVE})
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# Always remove "root=X", as we now explicitly generate all kinds
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# of dump target mount information including root fs.
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#
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# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
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# about it(e.g. for debug purpose), then can pass "root=X" using
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# KDUMP_COMMANDLINE_APPEND.
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cmdline=$(remove_cmdline_param "$cmdline" root)
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# With the help of "--hostonly-cmdline", we can avoid some interitage.
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cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid rd.md.uuid fcoe)
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# Remove netroot, rd.iscsi.initiator and iscsi_initiator since
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# we get duplicate entries for the same in case iscsi code adds
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# it as well.
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cmdline=$(remove_cmdline_param "$cmdline" netroot rd.iscsi.initiator iscsi_initiator)
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cmdline="${cmdline} ${KDUMP_COMMANDLINE_APPEND}"
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id=$(get_bootcpu_apicid)
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if [ ! -z ${id} ] ; then
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cmdline=$(append_cmdline "${cmdline}" disable_cpu_apicid ${id})
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fi
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KDUMP_COMMANDLINE=$cmdline
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}
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save_core()
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{
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coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"
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@ -366,21 +274,6 @@ get_pcs_cluster_modified_files()
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echo $modified_files
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}
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check_boot_dir()
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{
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#If user specify a boot dir for kdump kernel, let's use it. Otherwise
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#check whether it's a atomic host. If yes parse the subdirectory under
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#/boot; If not just find it under /boot.
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[ -n "$KDUMP_BOOTDIR" ] && return
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if ! is_atomic || [ "$(uname -m)" = "s390x" ]; then
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KDUMP_BOOTDIR="/boot"
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else
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eval $(cat /proc/cmdline| grep "BOOT_IMAGE" | cut -d' ' -f1)
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KDUMP_BOOTDIR="/boot"$(dirname $BOOT_IMAGE)
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fi
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}
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setup_initrd()
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{
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DEFAULT_INITRD="${KDUMP_BOOTDIR}/initramfs-`uname -r`.img"
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@ -603,7 +496,7 @@ check_rebuild()
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local _force_no_rebuild force_no_rebuild="0"
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local ret system_modified="0"
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check_boot_dir
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KDUMP_BOOTDIR=$(check_boot_dir "${KDUMP_BOOTDIR}")
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if [ -z "$KDUMP_KERNELVER" ]; then
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kdump_kver=`uname -r`
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@ -693,44 +586,13 @@ check_rebuild()
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return $?
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}
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# This function check iomem and determines if we have more than
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# 4GB of ram available. Returns 1 if we do, 0 if we dont
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need_64bit_headers()
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{
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return `tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); \
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print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }'`
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}
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# Load the kdump kernel specified in /etc/sysconfig/kdump
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# If none is specified, try to load a kdump kernel with the same version
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# as the currently running kernel.
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load_kdump()
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{
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ARCH=`uname -m`
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if [ "$ARCH" == "i686" -o "$ARCH" == "i386" ]
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then
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need_64bit_headers
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if [ $? == 1 ]
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then
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FOUND_ELF_ARGS=`echo $KEXEC_ARGS | grep elf32-core-headers`
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if [ -n "$FOUND_ELF_ARGS" ]
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then
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echo -n "Warning: elf32-core-headers overrides correct elf64 setting"
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echo
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else
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KEXEC_ARGS="$KEXEC_ARGS --elf64-core-headers"
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fi
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else
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FOUND_ELF_ARGS=`echo $KEXEC_ARGS | grep elf64-core-headers`
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if [ -z "$FOUND_ELF_ARGS" ]
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then
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KEXEC_ARGS="$KEXEC_ARGS --elf32-core-headers"
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fi
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fi
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fi
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prepare_cmdline
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KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")
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KDUMP_COMMANDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
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# For secureboot enabled machines, use new kexec file based syscall.
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# Old syscall will always fail as it does not have capability to
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@ -865,21 +727,6 @@ check_current_fadump_status()
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return 1
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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"
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||||
return 1
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fi
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||||
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||||
rc=`cat /sys/kernel/kexec_crash_loaded`
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if [ $rc == 1 ]; then
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return 0
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else
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return 1
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||||
fi
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||||
}
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check_current_status()
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{
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if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
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@ -989,58 +836,6 @@ selinux_relabel()
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done
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||||
}
|
||||
|
||||
# Check if secure boot is being enforced.
|
||||
#
|
||||
# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
|
||||
# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
|
||||
# bytes are the attributes associated with the variable and can safely be
|
||||
# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
|
||||
# is 1 and SetupMode is 0, then secure boot is being enforced.
|
||||
#
|
||||
# Assume efivars is mounted at /sys/firmware/efi/efivars.
|
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is_secure_boot_enforced()
|
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{
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local secure_boot_file setup_mode_file
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local secure_boot_byte setup_mode_byte
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|
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secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-* 2>/dev/null)
|
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setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-* 2>/dev/null)
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if [ -f "$secure_boot_file" ] && [ -f "$setup_mode_file" ]; then
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secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' $secure_boot_file|cut -d' ' -f 5)
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setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' $setup_mode_file|cut -d' ' -f 5)
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|
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if [ "$secure_boot_byte" = "1" ] && [ "$setup_mode_byte" = "0" ]; then
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return 0
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||||
fi
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||||
fi
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||||
return 1
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}
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check_crash_mem_reserved()
|
||||
{
|
||||
local mem_reserved
|
||||
|
||||
mem_reserved=$(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_fence_kdump_config()
|
||||
{
|
||||
local hostname=`hostname`
|
||||
|
||||
Loading…
Reference in New Issue
Block a user