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net/mlx5e: TC ipv4 tunnel encap offload error flow fixes

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When the route lookup fails we should return the actual error.

When the neigh isn't valid, we should return -EOPNOTSUPP as done
in similar cases along the code.

When the offload can't take place as of invalid neigh etc, we
must release the neigh.

Fixes: a54e20b4fc ('net/mlx5e: Add basic TC tunnel set action for SRIOV offloads')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2017-01-10 22:33:32 +02:00 committed by David S. Miller
parent 2fcd82e9be
commit a42485eb0e
1 changed files with 8 additions and 8 deletions
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16
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -656,17 +656,14 @@ static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
#if IS_ENABLED(CONFIG_INET)
rt = ip_route_output_key(dev_net(mirred_dev), fl4);
if (IS_ERR(rt)) {
pr_warn("%s: no route to %pI4\n", __func__, &fl4->daddr);
return -EOPNOTSUPP;
}
if (IS_ERR(rt))
return PTR_ERR(rt);
#else
return -EOPNOTSUPP;
#endif
if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev)) {
pr_warn("%s: Can't offload the flow, netdevices aren't on the same HW e-switch\n",
__func__);
pr_warn("%s: can't offload, devices not on same HW e-switch\n", __func__);
ip_rt_put(rt);
return -EOPNOTSUPP;
}
@ -727,8 +724,8 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
struct net_device **out_dev)
{
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
struct neighbour *n = NULL;
struct flowi4 fl4 = {};
struct neighbour *n;
char *encap_header;
int encap_size;
__be32 saddr;
@ -759,7 +756,8 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
e->out_dev = *out_dev;
if (!(n->nud_state & NUD_VALID)) {
err = -ENOTSUPP;
pr_warn("%s: can't offload, neighbour to %pI4 invalid\n", __func__, &fl4.daddr);
err = -EOPNOTSUPP;
goto out;
}
@ -781,6 +779,8 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
err = mlx5_encap_alloc(priv->mdev, e->tunnel_type,
encap_size, encap_header, &e->encap_id);
out:
if (err && n)
neigh_release(n);
kfree(encap_header);
return err;
}