all: Move the multi-configuration file reading routine to a common helper
Based on Emil's (xexaxo) feedback, we now have a common.sh file that contains the implementation of the routine to read all config files for kdump/pstore, and we use Makefile to join the files, having the same implemention in all users. Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
This commit is contained in:
Guilherme G. Piccoli
151
kdump-load.sh.in
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151
kdump-load.sh.in
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# This function has 2 purposes: if 'kdump' is passed as argument and we don't
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# have crashkernel memory reserved, we edit grub config file and recreate
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# grub.cfg, so next boot has it reserved; in this case, we also bail-out,
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# since kdump can't be loaded anyway.
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#
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# If 'pstore' is passsed as argument, we try to unset crashkernel iff it's
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# already set AND the pattern in grub config is the one added by us - if the
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# users set crashkernel themselves, we don't mess with that.
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grub_update() {
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CRASHK="$(cat /sys/kernel/kexec_crash_size)"
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SED_ADD="s/^GRUB_CMDLINE_LINUX_DEFAULT=\"/GRUB_CMDLINE_LINUX_DEFAULT=\"${GRUB_CMDLINE}/g"
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if [ "${GRUB_AUTOSET}" -eq 1 ]; then
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if [ "$1" = "kdump" ] && [ "${CRASHK}" -eq 0 ]; then
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sed -i "${SED_ADD}" "${GRUB_CFG_FILE}"
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if ! grub-mkconfig -o "${GRUB_BOOT_FILE}" 1>/dev/null; then
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logger "kdump: failed to execute command \"${GRUB_CMD}\""
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exit 1
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fi
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sync "${GRUB_BOOT_FILE}" 2>/dev/null
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logger "kdump: kexec won't succeed, no reserved memory in this boot..."
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logger "kdump: but we automatically set crashkernel for next boot."
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exit 0 # this is considered a successful run
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fi
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if [ "$1" = "pstore" ] && [ "${CRASHK}" -ne 0 ]; then
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sed -i "s/\"${GRUB_CMDLINE}/\"/g" "${GRUB_CFG_FILE}"
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if ! grub-mkconfig -o "${GRUB_BOOT_FILE}" 1>/dev/null; then
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logger "kdump: failed to execute command \"${GRUB_CMD}\""
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exit 1
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fi
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sync "${GRUB_BOOT_FILE}" 2>/dev/null
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logger "kdump: cleared crashkernel memory previously set."
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fi
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fi
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}
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# This function is responsible for creating the kdump initrd, either
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# via command-line call or in case initrd doesn't exist during kdump load.
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create_initrd() {
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rm -f "${MOUNT_FOLDER}/kdump-initrd-$(uname -r).img"
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echo "Creating the kdump initramfs for kernel \"$(uname -r)\" ..."
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DRACUT_NO_XATTR=1 dracut --no-early-microcode --host-only -q -m\
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"bash systemd systemd-initrd systemd-sysusers modsign dbus-daemon kdump dbus udev-rules dracut-systemd base fs-lib shutdown"\
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--kver "$(uname -r)" "${MOUNT_FOLDER}/kdump-initrd-$(uname -r).img"
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}
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# This routine performs a clean-up by deleting the old/useless remaining
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# kdump initrd files.
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cleanup_unused_initrd() {
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INSTALLED_KERNELS="${MOUNT_FOLDER}/.installed_kernels"
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find /lib/modules/* -maxdepth 0 -type d -exec basename {} \; 1> "${INSTALLED_KERNELS}"
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find "${MOUNT_FOLDER}"/* -name "kdump-initrd*" -type f -print0 2>/dev/null |\
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while IFS= read -r -d '' file
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do
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FNAME="$(basename "${file}" .img)"
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KVER="${FNAME#kdump-initrd-}"
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if ! grep -q "${KVER}" "${INSTALLED_KERNELS}" ; then
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rm -f "${MOUNT_FOLDER}/${FNAME}.img"
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logger "kdump: removed unused file \"${FNAME}.img\""
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fi
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done
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rm -f "${INSTALLED_KERNELS}"
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}
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load_kdump_config
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# Find the proper mount point expected for kdump collection:
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DEVN_MOUNTED="$(findmnt "${MOUNT_DEVNODE}" -fno TARGET)"
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# Create the kdump main folder here, as soon as possible, given
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# the importance of such directory in all kdump/pstore steps.
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MOUNT_FOLDER="${DEVN_MOUNTED}/${MOUNT_FOLDER}"
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mkdir -p "${MOUNT_FOLDER}"
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echo "${MOUNT_FOLDER}" > "${MNT_TMP}"
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sync "${MNT_TMP}"
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# Notice that at this point it's required to have the full
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# MOUNT_FOLDER, so this must remain after the DEVNODE operations above.
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if [ "$1" = "initrd" ]; then
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create_initrd
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exit 0
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fi
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if [ "$1" = "clear" ]; then
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rm -f "${MOUNT_FOLDER}"/kdump-initrd-*
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exit 0
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fi
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# Pstore-RAM load; if it is configured via the config files and fails
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# to configure pstore, we still try to load the kdump. We try to reserve
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# here a ${MEM_REQUIRED} memory region.
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# Notice that we assume ramoops is a module here - if built-in, users
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# should properly load it through command-line parameters.
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if [ "${USE_PSTORE_RAM}" -eq 1 ]; then
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MEM_REQUIRED="${PSTORE_MEM_AMOUNT}"
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RECORD_SIZE="${PSTORE_RECORD_SZ}"
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RANGE=$(grep "RAM buffer" /proc/iomem | head -n1 | cut -f1 -d\ )
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MEM_END=$(echo "$RANGE" | cut -f2 -d-)
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MEM_START=$(echo "$RANGE" | cut -f1 -d-)
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MEM_SIZE=$(( 16#${MEM_END} - 16#${MEM_START} ))
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if [ ${MEM_SIZE} -ge "${MEM_REQUIRED}" ]; then
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if modprobe ramoops mem_address=0x"${MEM_START}" mem_size="${MEM_REQUIRED}" record_size="${RECORD_SIZE}"; then
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# If Pstore is set, update grub.cfg to avoid reserving crashkernel memory.
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logger "kdump: pstore-RAM was loaded successfully"
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cleanup_unused_initrd
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grub_update pstore
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exit 0
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fi
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logger "kdump: pstore-RAM load failed...will try kdump"
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fi
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# Fallback to kdump load - if we fail when configuring pstore, better
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# trying kdump; in case we have crashkernel memory reserved, lucky us.
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# If not, we're going to set that automatically on grub_update().
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# Notice that if it's not set, we bail-out in grub_update() - there's
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# no point in continuing since kdump cannot work.
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fi
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cleanup_unused_initrd
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grub_update kdump
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# After some consideration, we've stolen the kdump parameters from
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# Debian/Ubuntu implementation, it makes sense for us.
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KDUMP_CMDLINE=$(sed -re 's/(^| )(crashkernel|hugepages|hugepagesz)=[^ ]*//g;s/"/\\\\"/' /proc/cmdline)
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KDUMP_CMDLINE="${KDUMP_CMDLINE} panic=-1 oops=panic fsck.mode=force fsck.repair=yes nr_cpus=1 reset_devices"
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VMLINUX="$(grep -o 'BOOT_IMAGE=[^ ]*' /proc/cmdline)"
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# In case we don't have a valid initrd, for some reason, try creating
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# one before loading kdump (or else it will fail).
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INITRD_FNAME="${MOUNT_FOLDER}/kdump-initrd-$(uname -r).img"
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if [ ! -s "${INITRD_FNAME}" ]; then
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create_initrd
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fi
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if ! kexec -s -p "${VMLINUX#*BOOT_IMAGE=}" --initrd "${INITRD_FNAME}" --append="${KDUMP_CMDLINE}"; then
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logger "kdump: kexec load failed"
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exit 1
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fi
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logger "kdump: panic kexec loaded successfully"
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