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ipv4: fib: Only flush FIB aliases belonging to currently flushed table 

In case the MAIN table is flushed and its trie is shared with the LOCAL
table, then we might be flushing FIB aliases belonging to the latter.
This can lead to FIB_ENTRY_DEL notifications sent with the wrong table
ID.

The above doesn't affect current listeners, as the table ID is ignored
during entry deletion, but this will change later in the patchset.

When flushing a particular table, skip any aliases belonging to a
different one.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Patrick McHardy <kaber@trash.net>
Reviewed-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Ido Schimmel 2017-02-09 10:28:38 +01:00 committed by David S. Miller
parent a507c346b7
commit 58e3bdd597
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/fib_trie.c
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@ -1963,7 +1963,8 @@ int fib_table_flush(struct net *net, struct fib_table *tb)
hlist_for_each_entry_safe(fa, tmp, &n->leaf, fa_list) {
struct fib_info *fi = fa->fa_info;
if (!fi || !(fi->fib_flags & RTNH_F_DEAD)) {
if (!fi || !(fi->fib_flags & RTNH_F_DEAD) ||
tb->tb_id != fa->tb_id) {
slen = fa->fa_slen;
continue;
}