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Re: [PATCH][RFC/v1][11/12] Add InfiniBand Documentation files

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH][RFC/v1][11/12] Add InfiniBand Documentation files
From: Roland Dreier <roland@xxxxxxxxxxx>
Date: Mon, 22 Nov 2004 07:41:47 -0800
Cc: linux-kernel@xxxxxxxxxxxxxxx, openib-general@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20041122153144.GA4821@xxxxxxxxxxxxx> (Christoph Hellwig's message of "Mon, 22 Nov 2004 15:31:44 +0000")
References: <20041122714.taTI3zcdWo5JfuMd@xxxxxxxxxxx> <20041122714.AyIOvRY195EGFTaO@xxxxxxxxxxx> <20041122153144.GA4821@xxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Security Through Obscurity, linux)
    Christoph> Any reason this doesn't use an interface similar to the
    Christoph> normal vlan code?

The normal vlan code uses an ioctl().  I thought a simple sysfs
interface would be more palatable than a new socket ioctl.

    Christoph> And what is a P_Key?

It is a 16-bit identifier carried by IB packets that says which
partition the packet is in.  End ports have P_Key tables that list
which partitions they are members of (a port can be a member of one or
more partitions, and can only receive packets from that partition).

 - Roland

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