unit tests for mbuf code

[Michael Richardson]

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I know that the *BSD stacks have been "ported" to run in userspace
multiple times over the years. (I don't have any good references right
now) I'm just interested in a way to run various mbuf related code in
userspace, so that I can do unit tests on code that I might change.

Has this been done recently? Are there any live projects or regression
testing systems that currently permit this?

- --
] Bear: "Me, I'm just the shape of a bear." | firewalls [
] Michael Richardson, Xelerance Corporation, Ottawa, ON |net architect[
] ***@xelerance.com http://www.sandelman.ottawa.on.ca/mcr/ |device driver[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [




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[Antti Kantee]

Post by Michael Richardson
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I know that the *BSD stacks have been "ported" to run in userspace
multiple times over the years. (I don't have any good references right
now) I'm just interested in a way to run various mbuf related code in
userspace, so that I can do unit tests on code that I might change.
Has this been done recently? Are there any live projects or regression
testing systems that currently permit this?

I am not aware of such work (not that I've looked too hard). But I am
very interested in any work in this or a similar area and will hopefully
at some point be able to dedicate some timeslices here. Being able to
host kernel code without modification in userspace would be a very very
nice feature.

(I'm hearing the screams of monolithisism maniacs already, even though
I either didn't say anything about actually having the userspace stuff
link with the kernel state)

[Michael Richardson]

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Antti> (I'm hearing the screams of monolithisism maniacs already,
Antti> even though I either didn't say anything about actually
Antti> having the userspace stuff link with the kernel state)

Yeah, I just want to write code that manipulates mbuf's and can verify
that I've handled all the different flavours that mbufs can come in.

- --
] Bear: "Me, I'm just the shape of a bear." | firewalls [
] Michael Richardson, Xelerance Corporation, Ottawa, ON |net architect[
] ***@xelerance.com http://www.sandelman.ottawa.on.ca/mcr/ |device driver[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [


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[Pavel Cahyna]

Post by Michael Richardson
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I know that the *BSD stacks have been "ported" to run in userspace
multiple times over the years. (I don't have any good references right
now) I'm just interested in a way to run various mbuf related code in
userspace, so that I can do unit tests on code that I might change.
Has this been done recently? Are there any live projects or regression
testing systems that currently permit this?

Yes, I've done this as a part of my Google Summer of Code project.
See http://netbsd-soc.sourceforge.net/projects/mbuf/userland-testing.html

Pavel

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