mlxsw: spectrum_router: Sanitize IPv6 FIB rules

We only allow FIB offload in the presence of default rules or an l3mdev
rule. In a similar fashion to IPv4 FIB rules, sanitize IPv6 rules.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 166ecf5..6c7fc6a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -48,6 +48,7 @@
 #include <net/neighbour.h>
 #include <net/arp.h>
 #include <net/ip_fib.h>
+#include <net/ip6_fib.h>
 #include <net/fib_rules.h>
 #include <net/l3mdev.h>
 #include <net/addrconf.h>
@@ -3087,6 +3088,23 @@ static void mlxsw_sp_router_fib4_event_work(struct work_struct *work)
 
 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work)
 {
+       struct mlxsw_sp_fib_event_work *fib_work =
+               container_of(work, struct mlxsw_sp_fib_event_work, work);
+       struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
+       struct fib_rule *rule;
+
+       rtnl_lock();
+       switch (fib_work->event) {
+       case FIB_EVENT_RULE_ADD: /* fall through */
+       case FIB_EVENT_RULE_DEL:
+               rule = fib_work->fr_info.rule;
+               if (!fib6_rule_default(rule) && !rule->l3mdev)
+                       mlxsw_sp_router_fib_abort(mlxsw_sp);
+               fib_rule_put(rule);
+               break;
+       }
+       rtnl_unlock();
+       kfree(fib_work);
 }
 
 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work,
@@ -3119,6 +3137,13 @@ static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work,
 static void mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work,
                                       struct fib_notifier_info *info)
 {
+       switch (fib_work->event) {
+       case FIB_EVENT_RULE_ADD: /* fall through */
+       case FIB_EVENT_RULE_DEL:
+               memcpy(&fib_work->fr_info, info, sizeof(fib_work->fr_info));
+               fib_rule_get(fib_work->fr_info.rule);
+               break;
+       }
 }
 
 /* Called with rcu_read_lock() */