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RDMA/mlx5: Add support for drop action in DV steering

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When drop action is used the matching packet will stop processing in
steering and will be dropped. This functionality will allow users to drop
matching packets.

Link: https://lore.kernel.org/r/20200504054227.271486-1-leon@kernel.org
Signed-off-by: Daria Velikovsky <daria@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Daria Velikovsky 2020-05-04 08:42:27 +03:00 committed by Jason Gunthorpe
parent 8c112a5f29
commit f29de9eee7
2 changed files with 22 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/infiniband/hw/mlx5/flow.c
View File

@ -69,11 +69,10 @@ 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, bool *def_miss)
int *dest_type, struct ib_qp **qp, u32 *flags)
{
bool dest_devx, dest_qp;
void *devx_obj;
u32 flags;
int err;
dest_devx = uverbs_attr_is_valid(attrs,
@ -81,23 +80,28 @@ static int get_dests(struct uverbs_attr_bundle *attrs,
dest_qp = uverbs_attr_is_valid(attrs,
MLX5_IB_ATTR_CREATE_FLOW_DEST_QP);
*def_miss = false;
err = uverbs_get_flags32(&flags, attrs,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS);
*flags = 0;
err = uverbs_get_flags32(flags, attrs, MLX5_IB_ATTR_CREATE_FLOW_FLAGS,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS |
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DROP);
if (err)
return err;
*def_miss = flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS;
/* Both flags are not allowed */
if (*flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS &&
*flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DROP)
return -EINVAL;
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_BYPASS) {
if (dest_devx && (dest_qp || *def_miss))
if (dest_devx && (dest_qp || *flags))
return -EINVAL;
else if (dest_qp && *def_miss)
else if (dest_qp && *flags)
return -EINVAL;
}
/* Allow only DEVX object as dest when inserting to FDB */
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_FDB && !dest_devx)
/* Allow only DEVX object, drop as dest for FDB */
if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_FDB && !(dest_devx ||
(*flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DROP)))
return -EINVAL;
/* Allow only DEVX object or QP as dest when inserting to RDMA_RX */
@ -166,7 +170,7 @@ 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;
u32 flags;
if (!capable(CAP_NET_RAW))
return -EPERM;
@ -176,12 +180,15 @@ 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, &def_miss))
if (get_dests(attrs, fs_matcher, &dest_id, &dest_type, &qp, &flags))
return -EINVAL;
if (def_miss)
if (flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS)
flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_NS;
if (flags & MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DROP)
flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
len = uverbs_attr_get_uobjs_arr(attrs,
MLX5_IB_ATTR_CREATE_FLOW_ARR_COUNTERS_DEVX, &arr_flow_actions);
if (len) {

1
include/uapi/rdma/mlx5_user_ioctl_cmds.h
View File

@ -243,6 +243,7 @@ enum mlx5_ib_flow_type {
enum mlx5_ib_create_flow_flags {
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DEFAULT_MISS = 1 << 0,
MLX5_IB_ATTR_CREATE_FLOW_FLAGS_DROP = 1 << 1,
};
enum mlx5_ib_create_flow_attrs {