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RDMA/mlx5: Add support in steering default miss

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User can configure default miss rule in order to skip matching in the user
domain and forward the packet to the kernel steering domain.  When user
requests a default miss rule, we add steering rule to forward the traffic
to the next namespace.

Link: https://lore.kernel.org/r/20200504053012.270689-5-leon@kernel.org
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Maor Gottlieb
2020-05-04 08:30:12 +03:00
committed by Jason Gunthorpe
parent b9019507aa
commit 8c112a5f29
3 changed files with 35 additions and 11 deletions
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32
drivers/infiniband/hw/mlx5/flow.c
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@@ -69,19 +69,32 @@ static const struct uverbs_attr_spec mlx5_ib_flow_type[] = {
static int get_dests(struct uverbs_attr_bundle *attrs,
struct mlx5_ib_flow_matcher *fs_matcher, int *dest_id,
int *dest_type, struct ib_qp **qp)
int *dest_type, struct ib_qp **qp, bool *def_miss)
{
bool dest_devx, dest_qp;
void *devx_obj;
u32 flags;
int err;
dest_devx = uverbs_attr_is_valid(attrs,
MLX5_IB_ATTR_CREATE_FLOW_DEST_DEVX);
dest_qp = uverbs_attr_is_valid(attrs,
MLX5_IB_ATTR_CREATE_FLOW_DEST_QP);
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_BYPASS &&
((dest_devx && dest_qp) || (!dest_devx && !dest_qp)))
return -EINVAL;
*def_miss = false;
err = uverbs_get_flags32(&flags, attrs,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS);
if (err)
return err;
*def_miss = flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS;
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_BYPASS) {
if (dest_devx && (dest_qp || *def_miss))
return -EINVAL;
else if (dest_qp && *def_miss)
return -EINVAL;
}
/* Allow only DEVX object as dest when inserting to FDB */
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_FDB && !dest_devx)
@@ -153,6 +166,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_CREATE_FLOW)(
void *devx_obj, *cmd_in;
struct ib_uobject *uobj;
struct mlx5_ib_dev *dev;
bool def_miss;
if (!capable(CAP_NET_RAW))
return -EPERM;
@@ -162,9 +176,12 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_CREATE_FLOW)(
uobj = uverbs_attr_get_uobject(attrs, MLX5_IB_ATTR_CREATE_FLOW_HANDLE);
dev = mlx5_udata_to_mdev(&attrs->driver_udata);
if (get_dests(attrs, fs_matcher, &dest_id, &dest_type, &qp))
if (get_dests(attrs, fs_matcher, &dest_id, &dest_type, &qp, &def_miss))
return -EINVAL;
if (def_miss)
flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_NS;
len = uverbs_attr_get_uobjs_arr(attrs,
MLX5_IB_ATTR_CREATE_FLOW_ARR_COUNTERS_DEVX, &arr_flow_actions);
if (len) {
@@ -636,7 +653,10 @@ DECLARE_UVERBS_NAMED_METHOD(
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_CREATE_FLOW_ARR_COUNTERS_DEVX_OFFSET,
UVERBS_ATTR_MIN_SIZE(sizeof(u32)),
UA_OPTIONAL,
UA_ALLOC_AND_COPY));
UA_ALLOC_AND_COPY),
UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_CREATE_FLOW_FLAGS,
enum mlx5_ib_create_flow_flags,
UA_OPTIONAL));
DECLARE_UVERBS_NAMED_METHOD_DESTROY(
MLX5_IB_METHOD_DESTROY_FLOW,