Author: alexander
Date: 2007-05-08 10:05:11 -0600 (Tue, 08 May 2007)
New Revision: 1883
Modified:
trunk/packages/initramfs/Makefile
trunk/packages/initramfs/init.in
Log:
Initial support for copying the whole CD to RAM.
Shutdown is currently unclean in this situation.
Modified: trunk/packages/initramfs/Makefile
===================================================================
--- trunk/packages/initramfs/Makefile 2007-05-08 13:26:58 UTC (rev 1882)
+++ trunk/packages/initramfs/Makefile 2007-05-08 16:05:11 UTC (rev 1883)
@@ -25,6 +25,7 @@
sed -i 's/, *GROUP="[^"]*"//' $(WDIR)/etc/udev/rules.d/*
sed s/@VERSION@/$(VERSION)/ init.in >$(WDIR)/init
chmod 755 $(WDIR)/init
+ cp fakecd.iso.head $(WDIR)
mknod -m 640 $(WDIR)/dev/console c 5 1
mknod -m 664 $(WDIR)/dev/null c 1 3
cp /bin/{sh,dd,cat,cp,mkdir,mount,umount,sed,sleep,ln,rm,uname}
$(WDIR)/bin
Modified: trunk/packages/initramfs/init.in
===================================================================
--- trunk/packages/initramfs/init.in 2007-05-08 13:26:58 UTC (rev 1882)
+++ trunk/packages/initramfs/init.in 2007-05-08 16:05:11 UTC (rev 1883)
@@ -13,6 +13,7 @@
noresume=0
resume=
all_generic_ide=0
+toram=0
find_cd() {
for SYS in /sys/block/hd* /sys/block/sr* ; do
@@ -39,6 +40,46 @@
esac
}
+copy_cd_to_ram() {
+ mount -n -t iso9660 -o ro,norock /dev/lfs-cd /.tmpfs/.cdrom
+ cat /fakecd.iso.head >/.tmpfs/.fakecd.iso
+ dd if=/.tmpfs/.cdrom/root.ext2 bs=2048 conv=sync >>/.tmpfs/.fakecd.iso
+ # Update volume size
+ vsize=`stat -c '%s' /.tmpfs/.fakecd.iso`
+ vsize=$(( $vsize >> 11 ))
+ printf $(printf '\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\n' \
+ $(( vsize & 0xff )) $(( ( vsize >> 8 ) & 0xff )) \
+ $(( ( vsize >> 16 ) & 0xff )) $(( ( vsize >> 24 ) & 0xff )) \
+ $(( ( vsize >> 24 ) & 0xff )) $(( ( vsize >> 16 ) & 0xff )) \
+ $(( ( vsize >> 8 ) & 0xff )) $(( vsize & 0xff )) \
+ ) | dd of=/.tmpfs/.fakecd.iso bs=1 seek=32848 conv=notrunc 2>/dev/null
+ # Update compressed size
+ csize=`stat -c '%s' /.tmpfs/.cdrom/root.ext2`
+ printf $(printf '\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\\x%x\n' \
+ $(( csize & 0xff )) $(( ( csize >> 8 ) & 0xff )) \
+ $(( ( csize >> 16 ) & 0xff )) $(( ( csize >> 24 ) & 0xff )) \
+ $(( ( csize >> 24 ) & 0xff )) $(( ( csize >> 16 ) & 0xff )) \
+ $(( ( csize >> 8 ) & 0xff )) $(( csize & 0xff )) \
+ ) | dd of=/.tmpfs/.fakecd.iso bs=1 seek=47352 conv=notrunc 2>/dev/null
+ # Update compression parameters
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=2 skip=12 seek=47473 conv=notrunc 2>/dev/null
+ # Update uncompressed size
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=4 skip=8 seek=47475 conv=notrunc 2>/dev/null
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=1 skip=11 seek=47479 conv=notrunc 2>/dev/null
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=1 skip=10 seek=47480 conv=notrunc 2>/dev/null
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=1 skip=9 seek=47481 conv=notrunc 2>/dev/null
+ dd if=/.tmpfs/.cdrom/root.ext2 of=of=/.tmpfs/.fakecd.iso \
+ bs=1 count=1 skip=8 seek=47482 conv=notrunc 2>/dev/null
+ umount -n /.tmpfs/.cdrom
+ /sbin/losetup /dev/loop2 /.tmpfs/.fakecd.iso
+ ln -sf /dev/loop2 /dev/lfs-cd
+}
+
do_mount_cd() {
while [ ! -L /dev/lfs-cd ] ; do
find_cd
@@ -60,6 +101,7 @@
mkdir /.tmpfs
mount -n -t tmpfs -o size=90% tmpfs /.tmpfs
mkdir /.tmpfs/.cdrom
+ if [ "$toram" = 1 ] ; then copy_cd_to_ram ; fi
mount -n -t iso9660 -o ro /dev/lfs-cd /.tmpfs/.cdrom
/sbin/losetup /dev/loop0 /.tmpfs/.cdrom/root.ext2
SIZE=`/sbin/blockdev --getsize /dev/loop0`
@@ -70,7 +112,7 @@
echo "0 $SIZE snapshot /dev/loop0 /dev/loop1 p 8" | /sbin/dmsetup
create lfs-cd
mount -n -t ext2 /dev/mapper/lfs-cd /.root
mount -n --move /.tmpfs /.root/dev/shm
- cp -a /dev/lfs-cd /.root/dev/lfs-cd
+ if [ "$toram" != 1 ] ; then cp -a /dev/lfs-cd /.root/dev/lfs-cd ; fi
cat /etc/modprobe.conf >>/.root/etc/modprobe.conf
}
@@ -138,6 +180,9 @@
resume=*)
resume=${param#resume=}
;;
+ toram)
+ toram=1
+ ;;
esac
done
@@ -185,6 +230,6 @@
umount /proc
cd /.root
# Clean up and free some memory
-rm -rf /bin /sbin /lib /sys /proc /dev /.tmpfs /init
+rm -rf /bin /sbin /lib /sys /proc /dev /.tmpfs /init /fakecd.iso.head
./lib/ld-linux.so.2 --library-path ./lib ./bin/mount -n --move . /
exec ../lib/ld-linux.so.2 --library-path ./lib ./usr/sbin/chroot . /sbin/init
"$@"
--
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