new file mode 100644
@@ -0,0 +1,276 @@
+# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+
+name: net-shaper
+
+doc: |
+ Networking HW rate limiting configuration.
+
+ This API allows configuring HW shapers available on the network
+ devices at different levels (queues, network device) and allows
+ arbitrary manipulation of the scheduling tree of the involved
+ shapers.
+
+ Each @shaper is identified within the given device, by an @handle,
+ comprising both a @scope and an @id.
+
+ Depending on the @scope value, the shapers are attached to specific
+ HW objects (queues, devices) or, for @node scope, represent a
+ scheduling group, that can be placed in an arbitrary location of
+ the scheduling tree.
+
+ Shapers can be created with two different operations: the @set
+ operation, to create and update a single "attached" shaper, and
+ the @group operation, to create and update a scheduling
+ group. Only the @group operation can create @node scope shapers
+
+ Existing shapers can be deleted/reset via the @delete operation.
+
+ The user can query the running configuration via the @get operation.
+
+definitions:
+ -
+ type: enum
+ name: scope
+ doc: Defines the shaper @id interpretation.
+ render-max: true
+ entries:
+ - name: unspec
+ doc: The scope is not specified.
+ -
+ name: netdev
+ doc: The main shaper for the given network device.
+ -
+ name: queue
+ doc: |
+ The shaper is attached to the given device queue,
+ the @id represents the queue number.
+ -
+ name: node
+ doc: |
+ The shaper allows grouping of queues or other
+ node shapers; can be nested in either @netdev
+ shapers or other @node shapers, allowing placement
+ in any location of the scheduling tree, except
+ leaves and root.
+ -
+ type: enum
+ name: metric
+ doc: Different metric supported by the shaper.
+ entries:
+ -
+ name: bps
+ doc: Shaper operates on a bits per second basis.
+ -
+ name: pps
+ doc: Shaper operates on a packets per second basis.
+
+attribute-sets:
+ -
+ name: net-shaper
+ attributes:
+ -
+ name: handle
+ type: nest
+ nested-attributes: handle
+ doc: Unique identifier for the given shaper inside the owning device.
+ -
+ name: metric
+ type: u32
+ enum: metric
+ doc: Metric used by the given shaper for bw-min, bw-max and burst.
+ -
+ name: bw-min
+ type: uint
+ doc: Guaranteed bandwidth for the given shaper.
+ -
+ name: bw-max
+ type: uint
+ doc: Maximum bandwidth for the given shaper or 0 when unlimited.
+ -
+ name: burst
+ type: uint
+ doc: |
+ Maximum burst-size for shaping. Should not be interpreted
+ as a quantum.
+ -
+ name: priority
+ type: u32
+ doc: |
+ Scheduling priority for the given shaper. The priority
+ scheduling is applied to sibling shapers.
+ -
+ name: weight
+ type: u32
+ doc: |
+ Relative weight for round robin scheduling of the
+ given shaper.
+ The scheduling is applied to all sibling shapers
+ with the same priority.
+ -
+ name: ifindex
+ type: u32
+ doc: Interface index owning the specified shaper.
+ -
+ name: parent
+ type: nest
+ nested-attributes: handle
+ doc: |
+ Identifier for the parent of the affected shaper.
+ Only needed for @group operation.
+ -
+ name: leaves
+ type: nest
+ multi-attr: true
+ nested-attributes: leaf-info
+ doc: |
+ Describes a set of leaves shapers for a @group operation.
+ -
+ name: handle
+ attributes:
+ -
+ name: scope
+ type: u32
+ enum: scope
+ doc: Defines the shaper @id interpretation.
+ -
+ name: id
+ type: u32
+ doc: |
+ Numeric identifier of a shaper. The id semantic depends on
+ the scope. For @queue scope it's the queue id and for @node
+ scope it's the node identifier.
+ -
+ name: leaf-info
+ subset-of: net-shaper
+ attributes:
+ -
+ name: handle
+ -
+ name: priority
+ -
+ name: weight
+
+operations:
+ list:
+ -
+ name: get
+ doc: |
+ Get information about a shaper for a given device.
+ attribute-set: net-shaper
+
+ do:
+ pre: net-shaper-nl-pre-doit
+ post: net-shaper-nl-post-doit
+ request:
+ attributes: &ns-binding
+ - ifindex
+ - handle
+ reply:
+ attributes: &ns-attrs
+ - ifindex
+ - parent
+ - handle
+ - metric
+ - bw-min
+ - bw-max
+ - burst
+ - priority
+ - weight
+
+ dump:
+ pre: net-shaper-nl-pre-dumpit
+ post: net-shaper-nl-post-dumpit
+ request:
+ attributes:
+ - ifindex
+ reply:
+ attributes: *ns-attrs
+ -
+ name: set
+ doc: |
+ Create or update the specified shaper.
+ The set operation can't be used to create a @node scope shaper,
+ use the @group operation instead.
+ attribute-set: net-shaper
+ flags: [ admin-perm ]
+
+ do:
+ pre: net-shaper-nl-pre-doit
+ post: net-shaper-nl-post-doit
+ request:
+ attributes:
+ - ifindex
+ - handle
+ - metric
+ - bw-min
+ - bw-max
+ - burst
+ - priority
+ - weight
+
+ -
+ name: delete
+ doc: |
+ Clear (remove) the specified shaper. When deleting
+ a @node shaper, reattach all the node's leaves to the
+ deleted node's parent.
+ If, after the removal, the parent shaper has no more
+ leaves and the parent shaper scope is @node, the parent
+ node is deleted, recursively.
+ When deleting a @queue shaper or a @netdev shaper,
+ the shaper disappears from the hierarchy, but the
+ queue/device can still send traffic: it has an implicit
+ node with infinite bandwidth. Queue's implicit node
+ feeds an implicit RR node at the root of the hierarchy.
+ attribute-set: net-shaper
+ flags: [ admin-perm ]
+
+ do:
+ pre: net-shaper-nl-pre-doit
+ post: net-shaper-nl-post-doit
+ request:
+ attributes: *ns-binding
+
+ -
+ name: group
+ doc: |
+ Create or update a scheduling group, attaching the specified
+ @leaves shapers under the specified node identified by @handle,
+ creating the latter, if needed.
+ The @leaves shapers scope must be @queue and the node shaper
+ scope must be either @node or @netdev.
+ When the node shaper has @node scope, if the @handle @id is not
+ specified, a new shaper of such scope is created, otherwise the
+ specified node must already exist.
+ The @parent handle for the node shaper is optional in most cases.
+ For newly created node scope shaper, the node parent is set by
+ default to the parent linked to the @leaves before the @group
+ operation. If, prior to the grouping operation, the @leaves
+ have different parents, the node shaper @parent must be explicitly
+ set.
+ The user can optionally provide shaping attributes for the node
+ shaper.
+ The operation is atomic, on failure no change is applied to
+ the device shaping configuration, otherwise the @node shaper
+ full identifier, comprising @binding and @handle, is provided
+ as the reply.
+ attribute-set: net-shaper
+ flags: [ admin-perm ]
+
+ do:
+ pre: net-shaper-nl-pre-doit
+ post: net-shaper-nl-post-doit
+ request:
+ attributes:
+ - ifindex
+ - parent
+ - handle
+ - metric
+ - bw-min
+ - bw-max
+ - burst
+ - priority
+ - weight
+ - leaves
+ reply:
+ attributes: *ns-binding
@@ -15915,6 +15915,7 @@ F: include/linux/platform_data/wiznet.h
F: include/uapi/linux/cn_proc.h
F: include/uapi/linux/ethtool_netlink.h
F: include/uapi/linux/if_*
+F: include/uapi/linux/net_shaper.h
F: include/uapi/linux/netdev*
F: tools/testing/selftests/drivers/net/
X: Documentation/devicetree/bindings/net/bluetooth/
new file mode 100644
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/* Documentation/netlink/specs/net_shaper.yaml */
+/* YNL-GEN uapi header */
+
+#ifndef _UAPI_LINUX_NET_SHAPER_H
+#define _UAPI_LINUX_NET_SHAPER_H
+
+#define NET_SHAPER_FAMILY_NAME "net-shaper"
+#define NET_SHAPER_FAMILY_VERSION 1
+
+/**
+ * enum net_shaper_scope - Defines the shaper @id interpretation.
+ * @NET_SHAPER_SCOPE_UNSPEC: The scope is not specified.
+ * @NET_SHAPER_SCOPE_NETDEV: The main shaper for the given network device.
+ * @NET_SHAPER_SCOPE_QUEUE: The shaper is attached to the given device queue,
+ * the @id represents the queue number.
+ * @NET_SHAPER_SCOPE_NODE: The shaper allows grouping of queues or other node
+ * shapers; can be nested in either @netdev shapers or other @node shapers,
+ * allowing placement in any location of the scheduling tree, except leaves
+ * and root.
+ */
+enum net_shaper_scope {
+ NET_SHAPER_SCOPE_UNSPEC,
+ NET_SHAPER_SCOPE_NETDEV,
+ NET_SHAPER_SCOPE_QUEUE,
+ NET_SHAPER_SCOPE_NODE,
+
+ /* private: */
+ __NET_SHAPER_SCOPE_MAX,
+ NET_SHAPER_SCOPE_MAX = (__NET_SHAPER_SCOPE_MAX - 1)
+};
+
+/**
+ * enum net_shaper_metric - Different metric supported by the shaper.
+ * @NET_SHAPER_METRIC_BPS: Shaper operates on a bits per second basis.
+ * @NET_SHAPER_METRIC_PPS: Shaper operates on a packets per second basis.
+ */
+enum net_shaper_metric {
+ NET_SHAPER_METRIC_BPS,
+ NET_SHAPER_METRIC_PPS,
+};
+
+enum {
+ NET_SHAPER_A_HANDLE = 1,
+ NET_SHAPER_A_METRIC,
+ NET_SHAPER_A_BW_MIN,
+ NET_SHAPER_A_BW_MAX,
+ NET_SHAPER_A_BURST,
+ NET_SHAPER_A_PRIORITY,
+ NET_SHAPER_A_WEIGHT,
+ NET_SHAPER_A_IFINDEX,
+ NET_SHAPER_A_PARENT,
+ NET_SHAPER_A_LEAVES,
+
+ __NET_SHAPER_A_MAX,
+ NET_SHAPER_A_MAX = (__NET_SHAPER_A_MAX - 1)
+};
+
+enum {
+ NET_SHAPER_A_HANDLE_SCOPE = 1,
+ NET_SHAPER_A_HANDLE_ID,
+
+ __NET_SHAPER_A_HANDLE_MAX,
+ NET_SHAPER_A_HANDLE_MAX = (__NET_SHAPER_A_HANDLE_MAX - 1)
+};
+
+enum {
+ NET_SHAPER_CMD_GET = 1,
+ NET_SHAPER_CMD_SET,
+ NET_SHAPER_CMD_DELETE,
+ NET_SHAPER_CMD_GROUP,
+
+ __NET_SHAPER_CMD_MAX,
+ NET_SHAPER_CMD_MAX = (__NET_SHAPER_CMD_MAX - 1)
+};
+
+#endif /* _UAPI_LINUX_NET_SHAPER_H */
@@ -66,6 +66,9 @@ config SKB_DECRYPTED
config SKB_EXTENSIONS
bool
+config NET_SHAPER
+ bool
+
menu "Networking options"
source "net/packet/Kconfig"
@@ -79,3 +79,4 @@ obj-$(CONFIG_XDP_SOCKETS) += xdp/
obj-$(CONFIG_MPTCP) += mptcp/
obj-$(CONFIG_MCTP) += mctp/
obj-$(CONFIG_NET_HANDSHAKE) += handshake/
+obj-$(CONFIG_NET_SHAPER) += shaper/
new file mode 100644
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the net shaper infrastructure.
+#
+# Copyright (c) 2024, Red Hat, Inc.
+#
+
+obj-y += shaper.o shaper_nl_gen.o
new file mode 100644
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+
+#include "shaper_nl_gen.h"
+
+int net_shaper_nl_pre_doit(const struct genl_split_ops *ops,
+ struct sk_buff *skb, struct genl_info *info)
+{
+ return -EOPNOTSUPP;
+}
+
+void net_shaper_nl_post_doit(const struct genl_split_ops *ops,
+ struct sk_buff *skb, struct genl_info *info)
+{
+}
+
+int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ return -EOPNOTSUPP;
+}
+
+int net_shaper_nl_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ return -EOPNOTSUPP;
+}
+
+int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ return -EOPNOTSUPP;
+}
+
+int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ return -EOPNOTSUPP;
+}
+
+int net_shaper_nl_pre_dumpit(struct netlink_callback *cb)
+{
+ return -EOPNOTSUPP;
+}
+
+int net_shaper_nl_post_dumpit(struct netlink_callback *cb)
+{
+ return -EOPNOTSUPP;
+}
+
+static int __init shaper_init(void)
+{
+ return genl_register_family(&net_shaper_nl_family);
+}
+
+subsys_initcall(shaper_init);
new file mode 100644
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+/* Do not edit directly, auto-generated from: */
+/* Documentation/netlink/specs/net_shaper.yaml */
+/* YNL-GEN kernel source */
+
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include "shaper_nl_gen.h"
+
+#include <uapi/linux/net_shaper.h>
+
+/* Common nested types */
+const struct nla_policy net_shaper_handle_nl_policy[NET_SHAPER_A_HANDLE_ID + 1] = {
+ [NET_SHAPER_A_HANDLE_SCOPE] = NLA_POLICY_MAX(NLA_U32, 3),
+ [NET_SHAPER_A_HANDLE_ID] = { .type = NLA_U32, },
+};
+
+const struct nla_policy net_shaper_leaf_info_nl_policy[NET_SHAPER_A_WEIGHT + 1] = {
+ [NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+ [NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
+ [NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
+};
+
+/* NET_SHAPER_CMD_GET - do */
+static const struct nla_policy net_shaper_get_do_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
+ [NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
+ [NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+};
+
+/* NET_SHAPER_CMD_GET - dump */
+static const struct nla_policy net_shaper_get_dump_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
+ [NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
+};
+
+/* NET_SHAPER_CMD_SET - do */
+static const struct nla_policy net_shaper_set_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
+ [NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
+ [NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+ [NET_SHAPER_A_METRIC] = NLA_POLICY_MAX(NLA_U32, 1),
+ [NET_SHAPER_A_BW_MIN] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_BW_MAX] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_BURST] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
+ [NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
+};
+
+/* NET_SHAPER_CMD_DELETE - do */
+static const struct nla_policy net_shaper_delete_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
+ [NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
+ [NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+};
+
+/* NET_SHAPER_CMD_GROUP - do */
+static const struct nla_policy net_shaper_group_nl_policy[NET_SHAPER_A_LEAVES + 1] = {
+ [NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
+ [NET_SHAPER_A_PARENT] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+ [NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
+ [NET_SHAPER_A_METRIC] = NLA_POLICY_MAX(NLA_U32, 1),
+ [NET_SHAPER_A_BW_MIN] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_BW_MAX] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_BURST] = { .type = NLA_UINT, },
+ [NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
+ [NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
+ [NET_SHAPER_A_LEAVES] = NLA_POLICY_NESTED(net_shaper_leaf_info_nl_policy),
+};
+
+/* Ops table for net_shaper */
+static const struct genl_split_ops net_shaper_nl_ops[] = {
+ {
+ .cmd = NET_SHAPER_CMD_GET,
+ .pre_doit = net_shaper_nl_pre_doit,
+ .doit = net_shaper_nl_get_doit,
+ .post_doit = net_shaper_nl_post_doit,
+ .policy = net_shaper_get_do_nl_policy,
+ .maxattr = NET_SHAPER_A_IFINDEX,
+ .flags = GENL_CMD_CAP_DO,
+ },
+ {
+ .cmd = NET_SHAPER_CMD_GET,
+ .start = net_shaper_nl_pre_dumpit,
+ .dumpit = net_shaper_nl_get_dumpit,
+ .done = net_shaper_nl_post_dumpit,
+ .policy = net_shaper_get_dump_nl_policy,
+ .maxattr = NET_SHAPER_A_IFINDEX,
+ .flags = GENL_CMD_CAP_DUMP,
+ },
+ {
+ .cmd = NET_SHAPER_CMD_SET,
+ .pre_doit = net_shaper_nl_pre_doit,
+ .doit = net_shaper_nl_set_doit,
+ .post_doit = net_shaper_nl_post_doit,
+ .policy = net_shaper_set_nl_policy,
+ .maxattr = NET_SHAPER_A_IFINDEX,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
+ },
+ {
+ .cmd = NET_SHAPER_CMD_DELETE,
+ .pre_doit = net_shaper_nl_pre_doit,
+ .doit = net_shaper_nl_delete_doit,
+ .post_doit = net_shaper_nl_post_doit,
+ .policy = net_shaper_delete_nl_policy,
+ .maxattr = NET_SHAPER_A_IFINDEX,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
+ },
+ {
+ .cmd = NET_SHAPER_CMD_GROUP,
+ .pre_doit = net_shaper_nl_pre_doit,
+ .doit = net_shaper_nl_group_doit,
+ .post_doit = net_shaper_nl_post_doit,
+ .policy = net_shaper_group_nl_policy,
+ .maxattr = NET_SHAPER_A_LEAVES,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
+ },
+};
+
+struct genl_family net_shaper_nl_family __ro_after_init = {
+ .name = NET_SHAPER_FAMILY_NAME,
+ .version = NET_SHAPER_FAMILY_VERSION,
+ .netnsok = true,
+ .parallel_ops = true,
+ .module = THIS_MODULE,
+ .split_ops = net_shaper_nl_ops,
+ .n_split_ops = ARRAY_SIZE(net_shaper_nl_ops),
+};
new file mode 100644
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/* Documentation/netlink/specs/net_shaper.yaml */
+/* YNL-GEN kernel header */
+
+#ifndef _LINUX_NET_SHAPER_GEN_H
+#define _LINUX_NET_SHAPER_GEN_H
+
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include <uapi/linux/net_shaper.h>
+
+/* Common nested types */
+extern const struct nla_policy net_shaper_handle_nl_policy[NET_SHAPER_A_HANDLE_ID + 1];
+extern const struct nla_policy net_shaper_leaf_info_nl_policy[NET_SHAPER_A_WEIGHT + 1];
+
+int net_shaper_nl_pre_doit(const struct genl_split_ops *ops,
+ struct sk_buff *skb, struct genl_info *info);
+void
+net_shaper_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info);
+int net_shaper_nl_pre_dumpit(struct netlink_callback *cb);
+int net_shaper_nl_post_dumpit(struct netlink_callback *cb);
+
+int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info);
+int net_shaper_nl_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
+int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info);
+int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info);
+int net_shaper_nl_group_doit(struct sk_buff *skb, struct genl_info *info);
+
+extern struct genl_family net_shaper_nl_family;
+
+#endif /* _LINUX_NET_SHAPER_GEN_H */
Define the user-space visible interface to query, configure and delete network shapers via yaml definition. Add dummy implementations for the relevant NL callbacks. set() and delete() operations touch a single shaper creating/updating or deleting it. The group() operation creates a shaper's group, nesting multiple input shapers under the specified output shaper. Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- v6 -> v7: - s/Minimum g/G/ - shaper attributes for set() op are not nested anymore - node attributes for group() op are not nested anymore v5 -> v6: - moved back ifindex out of binding attr, drop the latter - restrict leaves attributes to scheduling-related ones v4 -> v5: - moved ifindex under the binding attr - moved id, scope to new attr set - rename 'root' as 'node' - deleted unused 'info' subset - a lot of doc update and fixup - removed empty black line at MAKEFILE eof v3 -> v4: - spec file rename - always use '@' for references - detached scope -> node scope - inputs/output -> leaves/root - deduplicate leaves/root policy - get/dump/group return ifindex, too - added some general introduction to the doc RFC v1 -> RFC v2: - u64 -> uint - net_shapers -> net-shapers - documented all the attributes - dropped [ admin-perm ] for get() op - group op - set/delete touch a single shaper --- Documentation/netlink/specs/net_shaper.yaml | 276 ++++++++++++++++++++ MAINTAINERS | 1 + include/uapi/linux/net_shaper.h | 78 ++++++ net/Kconfig | 3 + net/Makefile | 1 + net/shaper/Makefile | 8 + net/shaper/shaper.c | 55 ++++ net/shaper/shaper_nl_gen.c | 125 +++++++++ net/shaper/shaper_nl_gen.h | 34 +++ 9 files changed, 581 insertions(+) create mode 100644 Documentation/netlink/specs/net_shaper.yaml create mode 100644 include/uapi/linux/net_shaper.h create mode 100644 net/shaper/Makefile create mode 100644 net/shaper/shaper.c create mode 100644 net/shaper/shaper_nl_gen.c create mode 100644 net/shaper/shaper_nl_gen.h