cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smc_netlink.c (3624B)

      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_clc.h"
     23#include "smc_stats.h"
     24#include "smc_netlink.h"
     25
     26const struct nla_policy
     27smc_gen_ueid_policy[SMC_NLA_EID_TABLE_MAX + 1] = {
     28	[SMC_NLA_EID_TABLE_UNSPEC]	= { .type = NLA_UNSPEC },
     29	[SMC_NLA_EID_TABLE_ENTRY]	= { .type = NLA_STRING,
     30					    .len = SMC_MAX_EID_LEN,
     31					  },
     32};
     33
     34#define SMC_CMD_MAX_ATTR 1
     35/* SMC_GENL generic netlink operation definition */
     36static const struct genl_ops smc_gen_nl_ops[] = {
     37	{
     38		.cmd = SMC_NETLINK_GET_SYS_INFO,
     39		/* can be retrieved by unprivileged users */
     40		.dumpit = smc_nl_get_sys_info,
     41	},
     42	{
     43		.cmd = SMC_NETLINK_GET_LGR_SMCR,
     44		/* can be retrieved by unprivileged users */
     45		.dumpit = smcr_nl_get_lgr,
     46	},
     47	{
     48		.cmd = SMC_NETLINK_GET_LINK_SMCR,
     49		/* can be retrieved by unprivileged users */
     50		.dumpit = smcr_nl_get_link,
     51	},
     52	{
     53		.cmd = SMC_NETLINK_GET_LGR_SMCD,
     54		/* can be retrieved by unprivileged users */
     55		.dumpit = smcd_nl_get_lgr,
     56	},
     57	{
     58		.cmd = SMC_NETLINK_GET_DEV_SMCD,
     59		/* can be retrieved by unprivileged users */
     60		.dumpit = smcd_nl_get_device,
     61	},
     62	{
     63		.cmd = SMC_NETLINK_GET_DEV_SMCR,
     64		/* can be retrieved by unprivileged users */
     65		.dumpit = smcr_nl_get_device,
     66	},
     67	{
     68		.cmd = SMC_NETLINK_GET_STATS,
     69		/* can be retrieved by unprivileged users */
     70		.dumpit = smc_nl_get_stats,
     71	},
     72	{
     73		.cmd = SMC_NETLINK_GET_FBACK_STATS,
     74		/* can be retrieved by unprivileged users */
     75		.dumpit = smc_nl_get_fback_stats,
     76	},
     77	{
     78		.cmd = SMC_NETLINK_DUMP_UEID,
     79		/* can be retrieved by unprivileged users */
     80		.dumpit = smc_nl_dump_ueid,
     81	},
     82	{
     83		.cmd = SMC_NETLINK_ADD_UEID,
     84		.flags = GENL_ADMIN_PERM,
     85		.doit = smc_nl_add_ueid,
     86		.policy = smc_gen_ueid_policy,
     87	},
     88	{
     89		.cmd = SMC_NETLINK_REMOVE_UEID,
     90		.flags = GENL_ADMIN_PERM,
     91		.doit = smc_nl_remove_ueid,
     92		.policy = smc_gen_ueid_policy,
     93	},
     94	{
     95		.cmd = SMC_NETLINK_FLUSH_UEID,
     96		.flags = GENL_ADMIN_PERM,
     97		.doit = smc_nl_flush_ueid,
     98	},
     99	{
    100		.cmd = SMC_NETLINK_DUMP_SEID,
    101		/* can be retrieved by unprivileged users */
    102		.dumpit = smc_nl_dump_seid,
    103	},
    104	{
    105		.cmd = SMC_NETLINK_ENABLE_SEID,
    106		.flags = GENL_ADMIN_PERM,
    107		.doit = smc_nl_enable_seid,
    108	},
    109	{
    110		.cmd = SMC_NETLINK_DISABLE_SEID,
    111		.flags = GENL_ADMIN_PERM,
    112		.doit = smc_nl_disable_seid,
    113	},
    114	{
    115		.cmd = SMC_NETLINK_DUMP_HS_LIMITATION,
    116		/* can be retrieved by unprivileged users */
    117		.dumpit = smc_nl_dump_hs_limitation,
    118	},
    119	{
    120		.cmd = SMC_NETLINK_ENABLE_HS_LIMITATION,
    121		.flags = GENL_ADMIN_PERM,
    122		.doit = smc_nl_enable_hs_limitation,
    123	},
    124	{
    125		.cmd = SMC_NETLINK_DISABLE_HS_LIMITATION,
    126		.flags = GENL_ADMIN_PERM,
    127		.doit = smc_nl_disable_hs_limitation,
    128	},
    129};
    130
    131static const struct nla_policy smc_gen_nl_policy[2] = {
    132	[SMC_CMD_MAX_ATTR]	= { .type = NLA_REJECT, },
    133};
    134
    135/* SMC_GENL family definition */
    136struct genl_family smc_gen_nl_family __ro_after_init = {
    137	.hdrsize =	0,
    138	.name =		SMC_GENL_FAMILY_NAME,
    139	.version =	SMC_GENL_FAMILY_VERSION,
    140	.maxattr =	SMC_CMD_MAX_ATTR,
    141	.policy =	smc_gen_nl_policy,
    142	.netnsok =	true,
    143	.module =	THIS_MODULE,
    144	.ops =		smc_gen_nl_ops,
    145	.n_ops =	ARRAY_SIZE(smc_gen_nl_ops)
    146};
    147
    148int __init smc_nl_init(void)
    149{
    150	return genl_register_family(&smc_gen_nl_family);
    151}
    152
    153void smc_nl_exit(void)
    154{
    155	genl_unregister_family(&smc_gen_nl_family);
    156}