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mlxsw: spectrum_router: Handle encap to demoted tunnels

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Some tunnels that are offloadable on their own can nonetheless be
demoted to slow path if their local address is in conflict with that of
another tunnel. When a route is formed for such a tunnel,
mlxsw_sp_nexthop_ipip_init() fails to find the corresponding IPIP entry,
and that triggers a FIB abort.

Resolve the problem by not assuming that a tunnel for which
mlxsw_sp_ipip_ops.can_offload() holds also automatically has an IPIP
entry.

Fixes: af641713e9 ("mlxsw: spectrum_router: Onload conflicting tunnels")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2017-11-28 13:17:13 +01:00 committed by David S. Miller
parent cab43d9c87
commit d97cda5f46
1 changed files with 29 additions and 32 deletions
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61
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View file

@ -3361,22 +3361,19 @@ static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev)
return ul_dev ? (ul_dev->flags & IFF_UP) : true;
}
static int mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct net_device *ol_dev)
static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
bool removing;
if (!nh->nh_grp->gateway || nh->ipip_entry)
return 0;
return;
nh->ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (!nh->ipip_entry)
return -ENOENT;
removing = !mlxsw_sp_ipip_netdev_ul_up(ol_dev);
nh->ipip_entry = ipip_entry;
removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev);
__mlxsw_sp_nexthop_neigh_update(nh, removing);
return 0;
mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common);
}
static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp,
@ -3421,21 +3418,21 @@ static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct fib_nh *fib_nh)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct net_device *dev = fib_nh->nh_dev;
enum mlxsw_sp_ipip_type ipipt;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif *rif;
int err;
if (mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, fib_nh, &ipipt) &&
router->ipip_ops_arr[ipipt]->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV4)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
err = mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, dev);
if (err)
return err;
mlxsw_sp_nexthop_rif_init(nh, &nh->ipip_entry->ol_lb->common);
return 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV4)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;
@ -4712,21 +4709,21 @@ static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
const struct rt6_info *rt)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct net_device *dev = rt->dst.dev;
enum mlxsw_sp_ipip_type ipipt;
struct mlxsw_sp_rif *rif;
int err;
if (mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, &ipipt) &&
router->ipip_ops_arr[ipipt]->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV6)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
err = mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, dev);
if (err)
return err;
mlxsw_sp_nexthop_rif_init(nh, &nh->ipip_entry->ol_lb->common);
return 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev,
MLXSW_SP_L3_PROTO_IPV6)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;