Commit 6725033f authored by Joonwoo Park's avatar Joonwoo Park Committed by David S. Miller

[IPV4] fib_trie: 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: default avatarJoonwoo Park <joonwpark81@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bd566e75
......@@ -1214,6 +1214,9 @@ static int fn_trie_insert(struct fib_table *tb, struct fib_config *cfg)
struct fib_info *fi_drop;
u8 state;
if (fi->fib_treeref > 1)
goto out;
err = -ENOBUFS;
new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
if (new_fa == NULL)
......
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