From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Thu, 21 May 2015 14:59:59 +0000 (+0200)
Subject: net: af_unix: implement stream sendpage support
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~163^2~229^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=869e7c62486ec0e170a9771acaa251d1a33b5871;p=pandora-kernel.git

net: af_unix: implement stream sendpage support

This patch implements sendpage support for AF_UNIX SOCK_STREAM
sockets. This is also required for a complete splice implementation.

The implementation is a bit tricky because we append to already existing
skbs and so have to hold unix_sk->readlock to protect the reading side
from either advancing UNIXCB.consumed or freeing the skb at the socket
receive tail.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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