/dev/.initramfs copy state before switch_root

I have pushed the following changes.

* If netboot, copy /tmp/net.* to /dev/.initramfs/. Initscripts of your distribution or NetworkManager can read the files in this location to be aware of prior configured interfaces. A distribution may choose to do something with this information.

* If you specify kernel cmdline "rdcopystate", then all of /tmp/* is copied into /dev/.initramfs/. This could sometimes be useful for post-boot examination or debugging.

* net.<interface name>.lease is written containing the DHCP lease, because dcbw asked for this for NetworkManager. Your own tools could choose to do something with it or not.

TODO:

* We need something to write out a file like /dev/.initramfs/net.eth0.static in the case of a static IP during initrd. I have never used static IP with initrd before. Are there multiple syntaxes to configure static IP? Others have touched this part of the code.

Warren Togami
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That's great, thanks!

I don't know if this is really necessary. After all, it just a static conf and initscripts can just check if an interface is already up?

Anyway, the syntax to use on the commandline is ip=... See http://apps.sourceforge.net/trac/dracut/wiki/commandline for more information.

As for a file format, why not ask the NetworkManager people what they'd like to have?

Hope that helps
Philippe
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NetworkManager or initscripts perhaps cannot differentiate between checking if it is already up immediately at boot-up or if it is run again sometime later. It is really better for dracut to inform the OS explicitly in a uniform manner similar to if dhcp were used.

Dan, what file format would you prefer?

Warren Togami
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Hmm, but in both cases NetworkManager should just preserve this state. So if no dhcp was involved, reading the actual network state (interface and routes) and preserving them, should be preferred.

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Warren Togami wrote:
[snip]

By the way, why not do this:
---

index de459c3..8280b73 100755
@@ -70,7 +70,7 @@ do_dhcp() {
    # /sbin/dhclient-script will mark the netif up and generate the online
    # event for nfsroot
    # XXX add -V vendor class and option parsing per kernel
-    dhclient -1 -q -R ${reqs} -pf /tmp/dhclient.$netif.pid -lf /tmp/net.$netif.lease $netif
+    dhclient -1 -q -R ${reqs} -pf /tmp/dhclient.$netif.pid -lf /dev/.initramfs/net.$netif.lease $netif

}

ip_to_var() {

index fb1a604..eab923e 100755
@@ -35,6 +35,7 @@ mknod /dev/null c 1 3

mknod /dev/ptmx c 5 2
mknod /dev/console c 5 1
mkdir /dev/pts
+mkdir /dev/.initramfs/
mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts >/dev/null 2>&1

# run scriptlets to parse the command line
@@ -139,7 +140,6 @@ for x in "$@"; do
done

# Copy state
-mkdir /dev/.initramfs/
if getarg rdcopystate; then

    cp /tmp/* /dev/.initramfs/ >/dev/null 2>&1

else
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