1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  Shared Memory Communications over RDMA (SMC-R) and RoCE
 4 *
 5 *  Generic netlink support functions to interact with SMC module
 6 *
 7 *  Copyright IBM Corp. 2020
 8 *
 9 *  Author(s):	Guvenc Gulce <guvenc@linux.ibm.com>
10 */
11
12#include <linux/module.h>
13#include <linux/list.h>
14#include <linux/ctype.h>
15#include <linux/mutex.h>
16#include <linux/if.h>
17#include <linux/smc.h>
18
19#include "smc_core.h"
20#include "smc_ism.h"
21#include "smc_ib.h"
22#include "smc_stats.h"
23#include "smc_netlink.h"
24
25#define SMC_CMD_MAX_ATTR 1
26
27/* SMC_GENL generic netlink operation definition */
28static const struct genl_ops smc_gen_nl_ops[] = {
29	{
30		.cmd = SMC_NETLINK_GET_SYS_INFO,
31		/* can be retrieved by unprivileged users */
32		.dumpit = smc_nl_get_sys_info,
33	},
34	{
35		.cmd = SMC_NETLINK_GET_LGR_SMCR,
36		/* can be retrieved by unprivileged users */
37		.dumpit = smcr_nl_get_lgr,
38	},
39	{
40		.cmd = SMC_NETLINK_GET_LINK_SMCR,
41		/* can be retrieved by unprivileged users */
42		.dumpit = smcr_nl_get_link,
43	},
44	{
45		.cmd = SMC_NETLINK_GET_LGR_SMCD,
46		/* can be retrieved by unprivileged users */
47		.dumpit = smcd_nl_get_lgr,
48	},
49	{
50		.cmd = SMC_NETLINK_GET_DEV_SMCD,
51		/* can be retrieved by unprivileged users */
52		.dumpit = smcd_nl_get_device,
53	},
54	{
55		.cmd = SMC_NETLINK_GET_DEV_SMCR,
56		/* can be retrieved by unprivileged users */
57		.dumpit = smcr_nl_get_device,
58	},
59	{
60		.cmd = SMC_NETLINK_GET_STATS,
61		/* can be retrieved by unprivileged users */
62		.dumpit = smc_nl_get_stats,
63	},
64	{
65		.cmd = SMC_NETLINK_GET_FBACK_STATS,
66		/* can be retrieved by unprivileged users */
67		.dumpit = smc_nl_get_fback_stats,
68	},
69};
70
71static const struct nla_policy smc_gen_nl_policy[2] = {
72	[SMC_CMD_MAX_ATTR]	= { .type = NLA_REJECT, },
73};
74
75/* SMC_GENL family definition */
76struct genl_family smc_gen_nl_family __ro_after_init = {
77	.hdrsize =	0,
78	.name =		SMC_GENL_FAMILY_NAME,
79	.version =	SMC_GENL_FAMILY_VERSION,
80	.maxattr =	SMC_CMD_MAX_ATTR,
81	.policy =	smc_gen_nl_policy,
82	.netnsok =	true,
83	.module =	THIS_MODULE,
84	.ops =		smc_gen_nl_ops,
85	.n_ops =	ARRAY_SIZE(smc_gen_nl_ops)
86};
87
88int __init smc_nl_init(void)
89{
90	return genl_register_family(&smc_gen_nl_family);
91}
92
93void smc_nl_exit(void)
94{
95	genl_unregister_family(&smc_gen_nl_family);
96}