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mlx4: Avoid leaking steering rules on flow creation error flow

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If mlx4_ib_create_flow() attempts to create > 1 rules with the
firmware, and one of these registrations fail, we leaked the
already created flow rules.

One example of the leak is when the registration of the VXLAN ghost
steering rule fails, we didn't unregister the original rule requested
by the user, introduced in commit d2fce8a906 "mlx4: Set
user-space raw Ethernet QPs to properly handle VXLAN traffic".

While here, add dump of the VXLAN portion of steering rules
so it can actually be seen when flow creation fails.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2014-10-30 15:59:28 +02:00 committed by David S. Miller
parent a4f2dacbf2
commit 571e1b2c7a
2 changed files with 12 additions and 2 deletions
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10
drivers/infiniband/hw/mlx4/main.c
View File

@ -1173,18 +1173,24 @@ static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
err = __mlx4_ib_create_flow(qp, flow_attr, domain, type[i],
&mflow->reg_id[i]);
if (err)
goto err_free;
goto err_create_flow;
i++;
}
if (i < ARRAY_SIZE(type) && flow_attr->type == IB_FLOW_ATTR_NORMAL) {
err = mlx4_ib_tunnel_steer_add(qp, flow_attr, &mflow->reg_id[i]);
if (err)
goto err_free;
goto err_create_flow;
i++;
}
return &mflow->ibflow;
err_create_flow:
while (i) {
(void)__mlx4_ib_destroy_flow(to_mdev(qp->device)->dev, mflow->reg_id[i]);
i--;
}
err_free:
kfree(mflow);
return ERR_PTR(err);

4
drivers/net/ethernet/mellanox/mlx4/mcg.c
View File

@ -955,6 +955,10 @@ static void mlx4_err_rule(struct mlx4_dev *dev, char *str,
cur->ib.dst_gid_msk);
break;
case MLX4_NET_TRANS_RULE_ID_VXLAN:
len += snprintf(buf + len, BUF_SIZE - len,
"VNID = %d ", be32_to_cpu(cur->vxlan.vni));
break;
case MLX4_NET_TRANS_RULE_ID_IPV6:
break;