From: Richard Guy Briggs Date: Wed, 23 Apr 2014 01:31:54 +0000 (-0400) Subject: netlink: have netlink per-protocol bind function return an error code. X-Git-Tag: omap-for-v3.16/fixes-against-rc1~36^2~340^2~4 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4f520900522fd596e336c07e9aafd5b7a9564235;p=pandora-kernel.git netlink: have netlink per-protocol bind function return an error code. Have the netlink per-protocol optional bind function return an int error code rather than void to signal a failure. This will enable netlink protocols to perform extra checks including capabilities and permissions verifications when updating memberships in multicast groups. In netlink_bind() and netlink_setsockopt() the call to the per-protocol bind function was moved above the multicast group update to prevent any access to the multicast socket groups before checking with the per-protocol bind function. This will enable the per-protocol bind function to be used to check permissions which could be denied before making them available, and to avoid the messy job of undoing the addition should the per-protocol bind function fail. The netfilter subsystem seems to be the only one currently using the per-protocol bind function. Signed-off-by: Richard Guy Briggs Signed-off-by: David S. Miller --- Reading git-diff-tree failed