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|
--- a/Makefile.in
+++ b/Makefile.in
@@ -182,10 +182,11 @@
MAN_PAGES:=$(KEXEC_MANPAGE) $(VMCORE_DMESG_MANPAGE)
MAN_PAGES+=$(MANDIR)/man8/coldreboot.8
+MAN_PAGES+=$(MANDIR)/man8/kexec-load-kernel.8
BINARIES_i386:=$(KEXEC_TEST)
BINARIES_x86_64:=$(KEXEC_TEST)
BINARIES:=$(KEXEC) $(VMCORE_DMESG) $(BINARIES_$(ARCH))
-SCRIPTS:=$(SBINDIR)/coldreboot
+SCRIPTS:=$(SBINDIR)/coldreboot $(SBINDIR)/kexec-load-kernel
UNINSTALL_KDUMP = $(sbindir)/kdump
UNINSTALL_KDUMP_MANPAGE = $(mandir)/man8/kdump.8
--- a/kexec/Makefile
+++ b/kexec/Makefile
@@ -110,6 +110,8 @@
KEXEC_MANPAGE = $(MANDIR)/man8/kexec.8
KEXEC_COLDREBOOT=$(SBINDIR)/coldreboot
KEXEC_COLDREBOOT_MANPAGE=$(MANDIR)/man8/coldreboot.8
+KEXEC_LOADKERNEL=$(SBINDIR)/kexec-load-kernel
+KEXEC_LOADKERNEL_MANPAGE=$(MANDIR)/man8/kexec-load-kernel.8
-include $(KEXEC_DEPS)
@@ -134,6 +136,15 @@
@$(MKDIR) -p $(MANDIR)/man8
cp kexec/coldreboot.8 $(KEXEC_COLDREBOOT_MANPAGE)
+$(KEXEC_LOADKERNEL): kexec/kexec-load-kernel
+ @$(MKDIR) -p $(@D)
+ cp kexec/kexec-load-kernel $(KEXEC_LOADKERNEL)
+ /bin/chmod 755 $(KEXEC_LOADKERNEL)
+
+$(KEXEC_LOADKERNEL_MANPAGE): kexec/kexec-load-kernel.8
+ @$(MKDIR) -p $(MANDIR)/man8
+ cp kexec/kexec-load-kernel.8 $(KEXEC_LOADKERNEL_MANPAGE)
+
echo::
@echo "KEXEC_SRCS $(KEXEC_SRCS)"
@echo "KEXEC_DEPS $(KEXEC_DEPS)"
--- /dev/null
+++ b/kexec/kexec-load-kernel
@@ -0,0 +1,90 @@
+#! /bin/sh
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+NOKEXECFILE=/no-kexec-reboot
+
+. /lib/lsb/init-functions
+
+test -r /etc/default/kexec && . /etc/default/kexec
+if [ -d /etc/default/kexec.d ] ; then
+ for snippet in $(run-parts --list /etc/default/kexec.d) ; do
+ . "$snippet"
+ done
+fi
+
+process_grub_entry() {
+ initrd_image=
+ while read command args; do
+ if [ "$command" = "linux" ]; then
+ echo "$args" | while read kernel append; do
+ echo KERNEL_IMAGE=\"${prefix}${kernel}\"
+ echo APPEND=\"${append}\"
+ done
+ elif [ "$command" = "initrd" ]; then
+ initrd_image=${prefix}${args}
+ fi
+ done
+ echo INITRD=\"$initrd_image\"
+}
+
+get_grub_kernel() {
+ test -f /boot/grub/grub.cfg || return
+ local prefix
+ mountpoint -q /boot && prefix=/boot || prefix=
+ data=$(cat /boot/grub/grub.cfg)
+
+ default=$(echo "$data" | awk '/set default/ {print $2}' | cut -d'"' -f2 | tail -1)
+ if [ "$default" = '${saved_entry}' ]; then
+ default=$(sed -ne 's/^saved_entry=//p' /boot/grub/grubenv)
+ fi
+ if [ -z "$default" ]; then
+ default=0
+ fi
+ start_offset=$((default + 1))
+ end_offset=$((default + 2))
+
+ # grub entries start with "menuentry" commands. Get the line
+ # numbers that surround the first entry
+ offsets=$(echo "$data" | grep -n '^[[:space:]]*menuentry[[:space:]]' | cut -d: -f1)
+ begin=$(echo "$offsets" | tail -n+$start_offset | head -n1)
+ end=$(echo "$offsets" | tail -n+$end_offset | head -n1)
+
+ # If this is the last entry, we need to read to the end of the file
+ # or to the end of boot entry section
+ if [ -z "$end" ]; then
+ numlines=$(echo "$data" | tail --lines=+$begin | grep -n "^### END" | head -1 | cut -d: -f1)
+ end=$((begin + numlines - 1))
+ fi
+
+ length=$((end - begin))
+ entry=$(echo "$data" | tail -n+$begin | head -n$length)
+ eval $(echo "$entry" | process_grub_entry)
+}
+
+load_kernel () {
+ test -x /sbin/kexec || exit 0
+ test "x`cat /sys/kernel/kexec_loaded`y" = "x1y" && exit 0
+
+ if [ -f $NOKEXECFILE ]
+ then
+ /bin/rm -f $NOKEXECFILE
+ exit 0
+ fi
+
+ test "$USE_GRUB_CONFIG" = "true" && get_grub_kernel
+
+ REAL_APPEND="$APPEND"
+
+ test -z "$REAL_APPEND" && REAL_APPEND="`cat /proc/cmdline`"
+ echo "Loading new kernel image into memory"
+ if [ -z "$INITRD" ]
+ then
+ /sbin/kexec -l "$KERNEL_IMAGE" --append="$REAL_APPEND"
+ else
+ /sbin/kexec -l "$KERNEL_IMAGE" --initrd="$INITRD" --append="$REAL_APPEND"
+ fi
+ echo "kexec kernel loaded"
+}
+
+load_kernel
+exit 0
--- /dev/null
+++ b/kexec/kexec-load-kernel.8
@@ -0,0 +1,19 @@
+.\" Process this file with
+.\" groff -man -Tascii kexec-load-kernel.8
+.\"
+.TH kexec 8 "April 2006" Linux "User Manuals"
+.SH NAME
+kexec-load-kernel \- Load the default grub kernel into kexec buffer
+.SH SYNOPSIS
+.B kexec-load-kernel
+
+.SH DESCRIPTION
+.B kexec-load-kernel
+parses grub configuration file to determine the default grub kernel and
+loads it in kexec buffer if kexec reboot is enabled.
+
+.SH NOTES
+.PP
+.B kexec-load-kernel
+is run just before a kexec reboot to load the new kernel in memory. The
+subsequent call to kexec will result in this kernel to be kexec'd.
|
