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 } 97