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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15840 3c298f89-4303-0410-b956-a3cf2f4a3e73
46 lines
2.2 KiB
Plaintext
46 lines
2.2 KiB
Plaintext
Openwrt inside a user mode linux. Why would we even want this many ask?
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There are potentially a lot of reasons, one obvious one to me, it allows
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folks to 'kick the tires' without actually flashing up any hardware. It's
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also a great environment for porting over packages, you can get a package
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fully functional in the uclibc root environment inside a uml without actually
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disturbing your 'real router', and then rebuild for a specific target once
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it's fully tested.
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This is a first stab at a build that 'just works' and there will be more
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cleanup to come. The simple directions are:-
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Configure for uml target
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Configure with an ext2 root file system
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build it all
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In your bin directory you will find a kernel and an ext2 root file system
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when it's finished. Just run it like this:-
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bin/openwrt-uml-vmlinux ubd0=bin/openwrt-uml-ext2.img con=null ssl=null ssl0=fd:0,fd:1 con0=null,fd:2
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The uml will start, and eventually the serial console of the uml will be at your
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console prompt. If you would like it in xterms, substitute con=xterm and con0=xterm.
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No networking is configured, but, it's a starting point. The resulting file system
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has just enough free space to start kicking the tires and playing in the world of
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'embedded routers' along with all the resource restrictions that come with that
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world.
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To configure networking and more, refer to the user mode linux documentation online.
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A quick start goes along this line. install the uml-utilities packages so you have
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the uml switch in and running, then add a command param to your uml start like this
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eth0=daemon,00:01:01:01:01:01,unix,/<your uml switch control socket here>
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With that in, and uml networking actually functional (can be a challenge at times),
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you should be able to ifconfig the interface and talk to the host side, or, if you
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bridged the uml switch to your host network, you should be able to run udhcp and be
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away with networking off to the world. Again, if you are unfamiliar with uml and
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uml networking, please read the docs and how-to stuff available on the net. It does
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take some fiddling to get it started and working right the first time, but after that,
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it opens up a whole new world of virtual machines.
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http://user-mode-linux.sourceforge.net/
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