LXR linux/net/smc/smc

   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_netlink.h"
  23
  24#define SMC_CMD_MAX_ATTR 1
  25
  26/* SMC_GENL generic netlink operation definition */
  27static const struct genl_ops smc_gen_nl_ops[] = {
  28        {
  29                .cmd = SMC_NETLINK_GET_SYS_INFO,
  30                /* can be retrieved by unprivileged users */
  31                .dumpit = smc_nl_get_sys_info,
  32        },
  33        {
  34                .cmd = SMC_NETLINK_GET_LGR_SMCR,
  35                /* can be retrieved by unprivileged users */
  36                .dumpit = smcr_nl_get_lgr,
  37        },
  38        {
  39                .cmd = SMC_NETLINK_GET_LINK_SMCR,
  40                /* can be retrieved by unprivileged users */
  41                .dumpit = smcr_nl_get_link,
  42        },
  43        {
  44                .cmd = SMC_NETLINK_GET_LGR_SMCD,
  45                /* can be retrieved by unprivileged users */
  46                .dumpit = smcd_nl_get_lgr,
  47        },
  48        {
  49                .cmd = SMC_NETLINK_GET_DEV_SMCD,
  50                /* can be retrieved by unprivileged users */
  51                .dumpit = smcd_nl_get_device,
  52        },
  53        {
  54                .cmd = SMC_NETLINK_GET_DEV_SMCR,
  55                /* can be retrieved by unprivileged users */
  56                .dumpit = smcr_nl_get_device,
  57        },
  58};
  59
  60static const struct nla_policy smc_gen_nl_policy[2] = {
  61        [SMC_CMD_MAX_ATTR]      = { .type = NLA_REJECT, },
  62};
  63
  64/* SMC_GENL family definition */
  65struct genl_family smc_gen_nl_family __ro_after_init = {
  66        .hdrsize =      0,
  67        .name =         SMC_GENL_FAMILY_NAME,
  68        .version =      SMC_GENL_FAMILY_VERSION,
  69        .maxattr =      SMC_CMD_MAX_ATTR,
  70        .policy =       smc_gen_nl_policy,
  71        .netnsok =      true,
  72        .module =       THIS_MODULE,
  73        .ops =          smc_gen_nl_ops,
  74        .n_ops =        ARRAY_SIZE(smc_gen_nl_ops)
  75};
  76
  77int __init smc_nl_init(void)
  78{
  79        return genl_register_family(&smc_gen_nl_family);
  80}
  81
  82void smc_nl_exit(void)
  83{
  84        genl_unregister_family(&smc_gen_nl_family);
  85}
  86