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 */ 27 static 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 60 static const struct nla_policy smc_gen_nl_policy[2] = { 61 [SMC_CMD_MAX_ATTR] = { .type = NLA_REJECT, }, 62 }; 63 64 /* SMC_GENL family definition */ 65 struct 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 77 int __init smc_nl_init(void) 78 { 79 return genl_register_family(&smc_gen_nl_family); 80 } 81 82 void smc_nl_exit(void) 83 { 84 genl_unregister_family(&smc_gen_nl_family); 85 } 86