tree f3794a6038eca1b848c98577ace64027b1fe6bb1
parent d13fda8564a67341aad257465cf319bdb2327e33
author Eric W. Biederman <ebiederm@xmission.com> 1337901687 -0600
committer Eric W. Biederman <ebiederm@xmission.com> 1345006189 -0700

netlink: Make the sending netlink socket availabe in NETLINK_CB

The sending socket of an skb is already available by it's port id
in the NETLINK_CB.  If you want to know more like to examine the
credentials on the sending socket you have to look up the sending
socket by it's port id and all of the needed functions and data
structures are static inside of af_netlink.c.  So do the simple
thing and pass the sending socket to the receivers in the NETLINK_CB.

I intend to use this to get the user namespace of the sending socket
in inet_diag so that I can report uids in the context of the process
who opened the socket, the same way I report uids in the contect
of the process who opens files.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>