linux-kernel - issues with mmap() on raw socket with rx

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Message-ID: <c93f91ee0907301525s7629435eged67b330e333f191@mail.gmail.com>
Date:	Fri, 31 Jul 2009 00:25:11 +0200
From:	leo mueller <llug.dan@...glemail.com>
To:	linux-kernel@...r.kernel.org
Subject: issues with mmap() on raw socket with rx_ring

hi all,

i tried to follow the procedures described in
Documentation/networking/packet_mmap.txt to
create an "zero copy" rx_ring for packet capturing.

i've attached an simple example and my output (see test_mmap.txt).
despite i compiled
the 2.6.30 kernel with CONFIG_PACKET_MMAP=y it won't work.

mem'mapping to the socket buffer always fails with -EINVAL and i have
no clue why.... :-/

do you have any idea?

thanks for help

View attachment "test_mmap.txt" of type "text/plain" (3428 bytes)