1e8372d9dSGuvenc Gulce // SPDX-License-Identifier: GPL-2.0 2e8372d9dSGuvenc Gulce /* 3e8372d9dSGuvenc Gulce * Shared Memory Communications over RDMA (SMC-R) and RoCE 4e8372d9dSGuvenc Gulce * 5e8372d9dSGuvenc Gulce * Generic netlink support functions to interact with SMC module 6e8372d9dSGuvenc Gulce * 7e8372d9dSGuvenc Gulce * Copyright IBM Corp. 2020 8e8372d9dSGuvenc Gulce * 9e8372d9dSGuvenc Gulce * Author(s): Guvenc Gulce <guvenc@linux.ibm.com> 10e8372d9dSGuvenc Gulce */ 11e8372d9dSGuvenc Gulce 12e8372d9dSGuvenc Gulce #include <linux/module.h> 13e8372d9dSGuvenc Gulce #include <linux/list.h> 14e8372d9dSGuvenc Gulce #include <linux/ctype.h> 15e8372d9dSGuvenc Gulce #include <linux/mutex.h> 16e8372d9dSGuvenc Gulce #include <linux/if.h> 17e8372d9dSGuvenc Gulce #include <linux/smc.h> 18e8372d9dSGuvenc Gulce 19e8372d9dSGuvenc Gulce #include "smc_core.h" 20aaf95523SGuvenc Gulce #include "smc_ism.h" 21*a3db10efSGuvenc Gulce #include "smc_ib.h" 22e8372d9dSGuvenc Gulce #include "smc_netlink.h" 23e8372d9dSGuvenc Gulce 24e8372d9dSGuvenc Gulce #define SMC_CMD_MAX_ATTR 1 25e8372d9dSGuvenc Gulce 26e8372d9dSGuvenc Gulce /* SMC_GENL generic netlink operation definition */ 27e8372d9dSGuvenc Gulce static const struct genl_ops smc_gen_nl_ops[] = { 28099b990bSGuvenc Gulce { 29099b990bSGuvenc Gulce .cmd = SMC_NETLINK_GET_SYS_INFO, 30099b990bSGuvenc Gulce /* can be retrieved by unprivileged users */ 31099b990bSGuvenc Gulce .dumpit = smc_nl_get_sys_info, 32099b990bSGuvenc Gulce }, 33e9b8c845SGuvenc Gulce { 34e9b8c845SGuvenc Gulce .cmd = SMC_NETLINK_GET_LGR_SMCR, 35e9b8c845SGuvenc Gulce /* can be retrieved by unprivileged users */ 36e9b8c845SGuvenc Gulce .dumpit = smcr_nl_get_lgr, 37e9b8c845SGuvenc Gulce }, 385a7e09d5SGuvenc Gulce { 395a7e09d5SGuvenc Gulce .cmd = SMC_NETLINK_GET_LINK_SMCR, 405a7e09d5SGuvenc Gulce /* can be retrieved by unprivileged users */ 415a7e09d5SGuvenc Gulce .dumpit = smcr_nl_get_link, 425a7e09d5SGuvenc Gulce }, 438f9dde4bSGuvenc Gulce { 448f9dde4bSGuvenc Gulce .cmd = SMC_NETLINK_GET_LGR_SMCD, 458f9dde4bSGuvenc Gulce /* can be retrieved by unprivileged users */ 468f9dde4bSGuvenc Gulce .dumpit = smcd_nl_get_lgr, 478f9dde4bSGuvenc Gulce }, 48aaf95523SGuvenc Gulce { 49aaf95523SGuvenc Gulce .cmd = SMC_NETLINK_GET_DEV_SMCD, 50aaf95523SGuvenc Gulce /* can be retrieved by unprivileged users */ 51aaf95523SGuvenc Gulce .dumpit = smcd_nl_get_device, 52aaf95523SGuvenc Gulce }, 53*a3db10efSGuvenc Gulce { 54*a3db10efSGuvenc Gulce .cmd = SMC_NETLINK_GET_DEV_SMCR, 55*a3db10efSGuvenc Gulce /* can be retrieved by unprivileged users */ 56*a3db10efSGuvenc Gulce .dumpit = smcr_nl_get_device, 57*a3db10efSGuvenc Gulce }, 58e8372d9dSGuvenc Gulce }; 59e8372d9dSGuvenc Gulce 60e8372d9dSGuvenc Gulce static const struct nla_policy smc_gen_nl_policy[2] = { 61e8372d9dSGuvenc Gulce [SMC_CMD_MAX_ATTR] = { .type = NLA_REJECT, }, 62e8372d9dSGuvenc Gulce }; 63e8372d9dSGuvenc Gulce 64e8372d9dSGuvenc Gulce /* SMC_GENL family definition */ 65e8372d9dSGuvenc Gulce struct genl_family smc_gen_nl_family __ro_after_init = { 66e8372d9dSGuvenc Gulce .hdrsize = 0, 67e8372d9dSGuvenc Gulce .name = SMC_GENL_FAMILY_NAME, 68e8372d9dSGuvenc Gulce .version = SMC_GENL_FAMILY_VERSION, 69e8372d9dSGuvenc Gulce .maxattr = SMC_CMD_MAX_ATTR, 70e8372d9dSGuvenc Gulce .policy = smc_gen_nl_policy, 71e8372d9dSGuvenc Gulce .netnsok = true, 72e8372d9dSGuvenc Gulce .module = THIS_MODULE, 73e8372d9dSGuvenc Gulce .ops = smc_gen_nl_ops, 74e8372d9dSGuvenc Gulce .n_ops = ARRAY_SIZE(smc_gen_nl_ops) 75e8372d9dSGuvenc Gulce }; 76e8372d9dSGuvenc Gulce 77e8372d9dSGuvenc Gulce int __init smc_nl_init(void) 78e8372d9dSGuvenc Gulce { 79e8372d9dSGuvenc Gulce return genl_register_family(&smc_gen_nl_family); 80e8372d9dSGuvenc Gulce } 81e8372d9dSGuvenc Gulce 82e8372d9dSGuvenc Gulce void smc_nl_exit(void) 83e8372d9dSGuvenc Gulce { 84e8372d9dSGuvenc Gulce genl_unregister_family(&smc_gen_nl_family); 85e8372d9dSGuvenc Gulce } 86