openwrtv4/package/boot/kexec-tools/Makefile
Daniel Golle 5e4bb476c0 kexec-tools: bump version and add support for crashdump kernel
split kexec-tools into two packages, kexec and kdump.
* kexec to simply execute a new kernel
* kdump is for loading and collecting debris of a crashed kernel with
  support for kdump forensics.

In order to properly support booting into a crashkernel, an init script
as well as UCI configuration has been added.
As modifying the kernel cmdline is required for this to work in x86
platforms use an uci-defaults script to modify /boot/grub/grub.cfg.

To test collecting crash information, use the 'c' sysrq-trigger, ie.
echo c > /proc/sysrq-trigger

This should result in the crash kernel being executed and (depending
on the configution) dmesg and/or vmcore getting saved.

To check if the crash kernel was loaded properly, use the 'status'
command of the kdump init script.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2017-06-09 22:21:25 +02:00

136 lines
3.5 KiB
Makefile

#
# Copyright (C) 2006-2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
PKG_NAME:=kexec-tools
PKG_VERSION:=2.0.14
PKG_RELEASE:=1
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=@KERNEL/linux/utils/kernel/kexec
PKG_HASH:=ffb2e7e99d9d08754c6bc1922aed3c000094f318665d82a72ecc76c4ff1c0dc6
PKG_FIXUP:=autoreconf
PKG_CONFIG_DEPENDS := CONFIG_KEXEC_ZLIB CONFIG_KEXEC_LZMA
include $(INCLUDE_DIR)/package.mk
define Package/kexec-tools/Default
SECTION:=utils
CATEGORY:=Utilities
URL:=http://kernel.org/pub/linux/kernel/people/horms/kexec-tools/
MAINTAINER:=Florian Fainelli <florian@openwrt.org>
endef
define Package/kexec-tools
$(call Package/kexec-tools/Default)
TITLE:=kexec-tools transition meta package
DEPENDS:=+kexec
endef
define Package/kexec-tools/description
kexec is a set of system calls that allows you to load
another kernel from the currently executing Linux kernel.
The kexec utility allows to load and boot another kernel.
endef
define Package/kexec
$(call Package/kexec-tools/Default)
TITLE:=Kernel boots kernel
DEPENDS:=\
@armeb||@arm||@i386||@x86_64||@powerpc64||@mipsel||@mips \
+KEXEC_ZLIB:zlib +KEXEC_LZMA:liblzma @KERNEL_KEXEC
endef
define Package/kexec/description
The kexec utility allows to load and boot another kernel.
endef
define Package/kdump
$(call Package/kexec-tools/Default)
TITLE:=Kernel crash analysis
DEPENDS:=+kexec @i386||@x86_64||@arm @KERNEL_CRASH_DUMP
endef
define Package/kdump/description
The kdump package allows to automatically boot into a
special kernel for analyzing kernel crashes using kdump.
endef
define Package/kexec/config
source "$(SOURCE)/Config.in"
endef
KEXEC_TARGET_NAME:=$(ARCH)-linux-$(TARGET_SUFFIX)
CONFIGURE_ARGS = \
--target=$(KEXEC_TARGET_NAME) \
--host=$(REAL_GNU_TARGET_NAME) \
--build=$(GNU_HOST_NAME) \
--program-prefix="" \
--program-suffix="" \
--prefix=/usr \
--exec-prefix=/usr \
--bindir=/usr/bin \
--sbindir=/usr/sbin \
--libexecdir=/usr/lib \
--sysconfdir=/etc \
$(if $(CONFIG_KEXEC_ZLIB),--with,--without)-zlib \
$(if $(CONFIG_KEXEC_LZMA),--with,--without)-lzma \
TARGET_LD="$(TARGET_CROSS)ld"
TARGET_CFLAGS += -ffunction-sections -fdata-sections
TARGET_LDFLAGS += -Wl,--gc-sections
CONFIGURE_VARS += \
BUILD_CC="$(HOSTCC)" \
TARGET_CC="$(TARGET_CC)"
define Build/Compile
$(MAKE) -C $(PKG_BUILD_DIR) DESTDIR="$(PKG_INSTALL_DIR)" all install
endef
define Package/kexec-tools/install
:
endef
define Package/kexec/install
$(INSTALL_DIR) $(1)/usr/sbin
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/kexec $(1)/usr/sbin
# make a link for compatability with other distros
$(INSTALL_DIR) $(1)/sbin
$(LN) ../usr/sbin/kexec $(1)/sbin/kexec
endef
define Package/kdump/install
$(INSTALL_DIR) $(1)/usr/sbin $(1)/etc/init.d $(1)/etc/config $(1)/etc/uci-defaults
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/kdump $(PKG_INSTALL_DIR)/usr/sbin/vmcore-dmesg $(1)/usr/sbin
$(INSTALL_BIN) ./files/kdump.init $(1)/etc/init.d/kdump
$(INSTALL_BIN) ./files/kdump.defaults $(1)/etc/uci-defaults/kdump
$(INSTALL_CONF) ./files/kdump.config $(1)/etc/config/kdump
endef
define Package/kdump/prerm
#!/bin/sh
case $$(uname -m) in
i?86|x86_64)
if grep -q " crashkernel=" /boot/grub/grub.cfg; then
mount /boot -o remount,rw
sed -i 's/ crashkernel=[^ ]*//' /boot/grub/grub.cfg
mount /boot -o remount,ro
fi
;;
esac
endef
$(eval $(call BuildPackage,kexec-tools))
$(eval $(call BuildPackage,kexec))
$(eval $(call BuildPackage,kdump))