net/smc/smc_netlink.c

   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 */
  28 static 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
  71 static const struct nla_policy smc_gen_nl_policy[2] = {
  72         [SMC_CMD_MAX_ATTR]      = { .type = NLA_REJECT, },
  73 };
  74
  75 /* SMC_GENL family definition */
  76 struct 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
  88 int __init smc_nl_init(void)
  89 {
  90         return genl_register_family(&smc_gen_nl_family);
  91 }
  92
  93 void smc_nl_exit(void)
  94 {
  95         genl_unregister_family(&smc_gen_nl_family);
  96 }