diff options
| author | Stefan Tomanek <stefan.tomanek@wertarbyte.de> | 2013-08-02 17:19:56 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-02 15:24:22 -0700 |
| commit | 6ef94cfafba159d6b1a902ccb3349ac6a34ff6ad (patch) | |
| tree | f2d7afebf4534ea50273165f4b0798aed704a37c /net/ipv4/fib_rules.c | |
| parent | d1c53c8e870cdedb6fc9550f41c558bab45b5219 (diff) | |
fib_rules: add route suppression based on ifgroup
This change adds the ability to suppress a routing decision based upon the
interface group the selected interface belongs to. This allows it to
exclude specific devices from a routing decision.
Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_rules.c')
| -rw-r--r-- | net/ipv4/fib_rules.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c index 9f2906679d1..b78fd28970c 100644 --- a/net/ipv4/fib_rules.c +++ b/net/ipv4/fib_rules.c @@ -103,16 +103,27 @@ errout: static bool fib4_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg) { + struct fib_result *result = (struct fib_result *) arg->result; + struct net_device *dev = result->fi->fib_dev; + /* do not accept result if the route does * not meet the required prefix length */ - struct fib_result *result = (struct fib_result *) arg->result; - if (result->prefixlen < rule->table_prefixlen_min) { - if (!(arg->flags & FIB_LOOKUP_NOREF)) - fib_info_put(result->fi); - return true; - } + if (result->prefixlen < rule->table_prefixlen_min) + goto suppress_route; + + /* do not accept result if the route uses a device + * belonging to a forbidden interface group + */ + if (rule->suppress_ifgroup != -1 && dev && dev->group == rule->suppress_ifgroup) + goto suppress_route; + return false; + +suppress_route: + if (!(arg->flags & FIB_LOOKUP_NOREF)) + fib_info_put(result->fi); + return true; } static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags) |