Commit bd566e75 authored Jan 18, 2008 by Joonwoo Park Committed by David S. Miller Jan 20, 2008

[IPV4] fib_hash: fix duplicated route issue

http://bugzilla.kernel.org/show_bug.cgi?id=9493



The fib allows making identical routes with 'ip route replace'.
This patch makes the fib return -EEXIST if replacement would cause duplication.

Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b3652b2d

net/ipv4/fib_hash.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -444,6 +444,9 @@ static int fn_hash_insert(struct fib_table tb, struct fib_config cfg)
		struct fib_info *fi_drop;
		u8 state;

		if (fi->fib_treeref > 1)
		goto out;

		write_lock_bh(&fib_hash_lock);
		fi_drop = fa->fa_info;
		fa->fa_info = fi;