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[IPV4] fib_trie: fix duplicated route issue

Browse Source 
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>
This commit is contained in:
Joonwoo Park 2008-01-18 03:45:18 -08:00 committed by David S. Miller
parent bd566e7525
commit 6725033fa2
1 changed files with 3 additions and 0 deletions
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3
net/ipv4/fib_trie.c
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@ -1214,6 +1214,9 @@ static int fn_trie_insert(struct fib_table *tb, struct fib_config *cfg)
struct fib_info *fi_drop; struct fib_info *fi_drop;
u8 state; u8 state;
if (fi->fib_treeref > 1)
goto out;
err = -ENOBUFS; err = -ENOBUFS;
new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL); new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
if (new_fa == NULL) if (new_fa == NULL)