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ipv4: Notify newly added route if should be offloaded

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When a route is added, it should only be notified in case it is the
first route in the FIB alias list with the given {prefix, prefix length,
table ID}. Otherwise, it is not used in the data path and should not be
considered by switch drivers.

v2:
* Convert to use fib_find_alias() instead of fib_find_first_alias()

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2019-12-14 17:53:10 +02:00 committed by David S. Miller
parent ee3936d658
commit a8674f753e
1 changed files with 10 additions and 0 deletions
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10
net/ipv4/fib_trie.c
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@ -1295,6 +1295,16 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
if (WARN_ON_ONCE(!l))
goto out_free_new_fa;
if (fib_find_alias(&l->leaf, new_fa->fa_slen, 0, 0, tb->tb_id, true) ==
new_fa) {
enum fib_event_type fib_event;
fib_event = FIB_EVENT_ENTRY_REPLACE_TMP;
err = call_fib_entry_notifiers(net, fib_event, key, plen,
new_fa, extack);
if (err)
goto out_remove_new_fa;
}
err = call_fib_entry_notifiers(net, event, key, plen, new_fa, extack);
if (err)
goto out_remove_new_fa;