Package: live-initramfs Version: 1.236.2-1 Hi there, last weekend I was testing something with fai, initramfs-tools and live-initramfs, because I had trouble with netbooting a via vb8001 mb with a second pcie e1000e card.The problem is, that one time the onboard via-velocity becomes eth1 next time eth0 (mostly eth1). Therefore it's not enough to specify live-netdev=eth1 as kernel param.
My idea is to work with the BOOTIF param which pxelinux set's as kernel param when you specify
ipappend 2in the pxelinux boot config of your machine. It includes the MAC of the nic the kernel was booted from (or so o:). You can also specify BOOTIF as a kernel param manually.
live-initramfs should simply acquire the ip(dhcp) through the same ip the kernel was loaded from.
I find this useful, because most of the people that do a pxe/netboot and mount a nfsroot (like fai does), want to get the ip address for the nfsroot (which will be mountes through/by live-initramfs) through the same device/ip/... the kernel was loaded from.
My current solution is:- take live-initramfs=1.236.2-1 source code from http://live.debian.net/archive/packages/live-boot/1.236.2-1 This is the last version of the old 1.x series. I took that one, because I have trouble using latest version of live-initramfs based on live-boot with fai (will file this as a separat bug). - change scripts/live-premount/select_eth_device that it takes live-netdev=BOOTIF as a parameter and that it set's the live-netdev to the interface that matches the MAC given in BOOTIF when done so.
@M.Attems: Thanx for writing the mac-nic-translator in initramfs-tools - I could easily use that one here (o:
- revert patch "5de51fc8b4f8e80f1ff1e734c971755c0c223150 - Using minimized rules file" from live.debian.net (live-boot) that package builds against plain lenny repo and sources.
- use initramfs-tools package as I described in bug #593276I don't know much about the work of a debian package maintainer and possibly it need's some extra work to make this "debian-clean", that's my idea and it works so far for me.
Attached is a diff.gz + dsc against http://live.debian.net/archive/packages/live-boot/1.236.2-1/live-initramfs_1.236.2.orig.tar.gz.
Here's also a patch for scripts/live-premount/select_eth_device which I primarily changed:
--- select_eth_device.orig 2010-05-18 06:53:40.000000000 +0200
+++ select_eth_device 2010-08-13 10:47:27.000000000 +0200
@@ -56,11 +56,80 @@ if [ $(echo $l_interfaces | wc -w) -lt 2
exit 0
fi
+for ARGUMENT in $(cat /proc/cmdline); do
+ case "${ARGUMENT}" in
+ BOOTIF=*)
+ BOOTIF="${ARGUMENT#BOOTIF=}"
+ echo "Found BOOTIF parameter in /proc/cmdline."
+ echo "Setting BOOTIF=$BOOTIF."
+ ;;
+ esac
+done
+
+# taken from git.kernel.org - initramfs-tools
+# commit 673abb77821433a67add61ac79d739c6cee9eee0
+# and bugfix commit 5db5becc85059e56075de5a331ed7c5a4cc2de0c
+# and changed it a bit for this purpose
+# thx maximilian attems
+if [ -n "${BOOTIF}" ]; then
+ # pxelinux sets BOOTIF to a value based on the mac address of the
+ # network card used to PXE boot, so use this value for DEVICE rather
+ # than a hard-coded device name from initramfs.conf. this facilitates
+ # network booting when machines may have multiple network cards.
+ # pxelinux sets BOOTIF to 01-$mac_address
+
+ # strip off the leading "01-", which isn't part of the mac
+ # address
+ temp_mac=${BOOTIF#*-}
+
+ # convert to typical mac address format by replacing "-" with ":"
+ bootif_mac=""
+ IFS='-'
+ for x in $temp_mac ; do
+ if [ -z "$bootif_mac" ]; then
+ bootif_mac="$x"
+ else
+ bootif_mac="$bootif_mac:$x"
+ fi
+ done
+ unset IFS
+
+ # look for devices with matching mac address, and set DEVICE to
+ # appropriate value if match is found.
+ for device in /sys/class/net/* ; do
+ if [ -f "$device/address" ]; then
+ current_mac=$(cat "$device/address")
+ if [ "$bootif_mac" = "$current_mac" ]; then
+ BOOTIF_DEVICE=${device##*/}
+ break
+ fi
+ fi
+ done
+ [ -n "$BOOTIF_DEVICE" ] && echo "Found matching dev to BOOTIF MAC.
Setting BOOTIF_DEVICE=$BOOTIF_DEVICE"
+fi
+
# If user force to use specific device, write it
for ARGUMENT in $(cat /proc/cmdline); do
case "${ARGUMENT}" in
live-netdev=*)
- NETDEV="${ARGUMENT#live-netdev=}"
+ LIVE_NETDEV="${ARGUMENT#live-netdev=}"
+ if [ "$LIVE_NETDEV" = "BOOTIF" ]; then
+ if [ -n "$BOOTIF_DEVICE" ]; then
+ NETDEV="$BOOTIF_DEVICE"
+ echo "Found live-netdev=BOOTIF in /proc/cmdline.
Setting NETDEV=$BOOTIF_DEVICE"
+ else
+ echo "Found live-netdev=BOOTIF in /proc/cmdline."
+ echo "No BOOTIF_DEVICE was found, try inserting line:"
+ echo "ipappend 2"
+ echo "to PXELINUX boot config (device not supported?)"
+ echo "or add BOOTIF kernel parameter with a correct MAC."
+ # live-netdev will not work here - leave the for loop
+ break
+ fi
+ else
+ NETDEV="$LIVE_NETDEV"
+ fi
+
echo "DEVICE=$NETDEV" >> /conf/param.conf
echo "Found live-netdev parameter in /proc/cmdline. Force to use
network device $NETDEV."
exit 0
Cheers
Holger Fischer
Attachment:
live-initramfs_1.236.2-1~hbpo01.diff.gz
Description: application/gzip
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