Commit 2e9ea3e3 authored by Nikolay Aleksandrov's avatar Nikolay Aleksandrov Committed by David S. Miller
Browse files

net: rtnetlink: add helper to extract msg type's kind 



Add a helper which extracts the msg type's kind using the kind mask (0x3).

Signed-off-by: default avatarNikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 12dc5c2c

include/net/rtnetlink.h

+6 −0
Original line number Diff line number Diff line
@@ -19,6 +19,12 @@ enum rtnl_kinds { 
	RTNL_KIND_GET,

	RTNL_KIND_SET

};

#define RTNL_KIND_MASK 0x3



static inline enum rtnl_kinds rtnl_msgtype_kind(int msgtype)

{

	return msgtype & RTNL_KIND_MASK;

}



void rtnl_register(int protocol, int msgtype,

		   rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);

net/core/rtnetlink.c

+1 −1
Original line number Diff line number Diff line
@@ -5947,7 +5947,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 
		return 0;



	family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;

	kind = type&3;

	kind = rtnl_msgtype_kind(type);



	if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))

		return -EPERM;