net: only check perm protocol when register proto
authorJunwei Zhang <martinbj2008@gmail.com>
Fri, 18 Sep 2015 04:00:05 +0000 (00:00 -0400)
committerDavid S. Miller <davem@davemloft.net>
Fri, 18 Sep 2015 04:02:59 +0000 (21:02 -0700)
commitf6c53334d6c6ac7088c2e7e70ff2941bfb33f52e
treec93d338e62e226a6bb75b27383521d133ae24ae0
parent4b1b865e4e97e336316f30e32af36d71e98bdabc
net: only check perm protocol when register proto

The permanent protocol nodes are at the head of the list,
So only need check all these nodes.

No matter the new node is permanent or not,
insert the new node after the last permanent protocol node,

If the new node conflicts with existing permanent node,
return error.

Signed-off-by: Martin Zhang <martinbj2008@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/af_inet.c