// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/core/devlink.c - Network physical/parent device Netlink interface
 *
 * Heavily inspired by net/wireless/
 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
 */

#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/gfp.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/refcount.h>
#include <linux/workqueue.h>
#include <linux/u64_stats_sync.h>
#include <linux/timekeeping.h>
#include <rdma/ib_verbs.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/devlink.h>

#include "devl_internal.h"

const struct genl_small_ops devlink_nl_small_ops[40] = {
	{
		.cmd = DEVLINK_CMD_PORT_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_port_set_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_RATE_SET,
		.doit = devlink_nl_cmd_rate_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_RATE_NEW,
		.doit = devlink_nl_cmd_rate_new_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_RATE_DEL,
		.doit = devlink_nl_cmd_rate_del_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_PORT_SPLIT,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_port_split_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_PORT_UNSPLIT,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_port_unsplit_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_PORT_NEW,
		.doit = devlink_nl_cmd_port_new_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_PORT_DEL,
		.doit = devlink_nl_cmd_port_del_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},

	{
		.cmd = DEVLINK_CMD_LINECARD_SET,
		.doit = devlink_nl_cmd_linecard_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_SB_POOL_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_sb_pool_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_sb_port_pool_set_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_sb_occ_snapshot_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_sb_occ_max_clear_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_ESWITCH_GET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_eswitch_get_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_ESWITCH_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_eswitch_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_dpipe_table_get,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_dpipe_entries_get,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_dpipe_headers_get,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_dpipe_table_counters_set,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_RESOURCE_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_resource_set,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_RESOURCE_DUMP,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_resource_dump,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = DEVLINK_CMD_RELOAD,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_reload,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_PARAM_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_param_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_PORT_PARAM_GET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_port_param_get_doit,
		.dumpit = devlink_nl_cmd_port_param_get_dumpit,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = DEVLINK_CMD_PORT_PARAM_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_port_param_set_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
	},
	{
		.cmd = DEVLINK_CMD_REGION_NEW,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_region_new,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_REGION_DEL,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_region_del,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_REGION_READ,
		.validate = GENL_DONT_VALIDATE_STRICT |
			    GENL_DONT_VALIDATE_DUMP_STRICT,
		.dumpit = devlink_nl_cmd_region_read_dumpit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_health_reporter_set_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_health_reporter_recover_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_health_reporter_diagnose_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
		.validate = GENL_DONT_VALIDATE_STRICT |
			    GENL_DONT_VALIDATE_DUMP_STRICT,
		.dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
	},
	{
		.cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_health_reporter_test_doit,
		.flags = GENL_ADMIN_PERM,
		.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
	},
	{
		.cmd = DEVLINK_CMD_FLASH_UPDATE,
		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
		.doit = devlink_nl_cmd_flash_update,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_TRAP_SET,
		.doit = devlink_nl_cmd_trap_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_TRAP_GROUP_SET,
		.doit = devlink_nl_cmd_trap_group_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_TRAP_POLICER_SET,
		.doit = devlink_nl_cmd_trap_policer_set_doit,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = DEVLINK_CMD_SELFTESTS_RUN,
		.doit = devlink_nl_cmd_selftests_run,
		.flags = GENL_ADMIN_PERM,
	},
	/* -- No new ops here! Use split ops going forward! -- */
};

void devlink_notify_register(struct devlink *devlink)
{
	devlink_notify(devlink, DEVLINK_CMD_NEW);
	devlink_linecards_notify_register(devlink);
	devlink_ports_notify_register(devlink);
	devlink_trap_policers_notify_register(devlink);
	devlink_trap_groups_notify_register(devlink);
	devlink_traps_notify_register(devlink);
	devlink_rates_notify_register(devlink);
	devlink_regions_notify_register(devlink);
	devlink_params_notify_register(devlink);
}

void devlink_notify_unregister(struct devlink *devlink)
{
	devlink_params_notify_unregister(devlink);
	devlink_regions_notify_unregister(devlink);
	devlink_rates_notify_unregister(devlink);
	devlink_traps_notify_unregister(devlink);
	devlink_trap_groups_notify_unregister(devlink);
	devlink_trap_policers_notify_unregister(devlink);
	devlink_ports_notify_unregister(devlink);
	devlink_linecards_notify_unregister(devlink);
	devlink_notify(devlink, DEVLINK_CMD_DEL);
}