netlink: spec: add shaper YAML spec

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.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/7a33a1ff370bdbcd0cd3f909575c912cd56f41da.1728460186.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/net/shaper/shaper_nl_gen.c b/net/shaper/shaper_nl_gen.c
new file mode 100644
index 000000000000..34185c5989e6
--- /dev/null
+++ b/net/shaper/shaper_nl_gen.c
@@ -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),
+};