From e8372d9d21451a2f2947c2b63b5184f3d4d0bff9 Mon Sep 17 00:00:00 2001 From: Guvenc Gulce Date: Tue, 1 Dec 2020 20:20:43 +0100 Subject: net/smc: Introduce generic netlink interface for diagnostic purposes Introduce generic netlink interface infrastructure to expose the diagnostic information regarding smc linkgroups, links and devices. Signed-off-by: Guvenc Gulce Signed-off-by: Karsten Graul Signed-off-by: Jakub Kicinski --- net/smc/Makefile | 2 +- net/smc/af_smc.c | 10 +++++++++- net/smc/smc_netlink.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++ net/smc/smc_netlink.h | 23 ++++++++++++++++++++++ 4 files changed, 86 insertions(+), 2 deletions(-) create mode 100644 net/smc/smc_netlink.c create mode 100644 net/smc/smc_netlink.h (limited to 'net/smc') diff --git a/net/smc/Makefile b/net/smc/Makefile index cb1254541f37..77e54fe42b1c 100644 --- a/net/smc/Makefile +++ b/net/smc/Makefile @@ -2,4 +2,4 @@ obj-$(CONFIG_SMC) += smc.o obj-$(CONFIG_SMC_DIAG) += smc_diag.o smc-y := af_smc.o smc_pnet.o smc_ib.o smc_clc.o smc_core.o smc_wr.o smc_llc.o -smc-y += smc_cdc.o smc_tx.o smc_rx.o smc_close.o smc_ism.o +smc-y += smc_cdc.o smc_tx.o smc_rx.o smc_close.o smc_ism.o smc_netlink.o diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index f79b59a972f0..47340b3b514f 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -45,6 +45,7 @@ #include "smc_ib.h" #include "smc_ism.h" #include "smc_pnet.h" +#include "smc_netlink.h" #include "smc_tx.h" #include "smc_rx.h" #include "smc_close.h" @@ -2495,10 +2496,14 @@ static int __init smc_init(void) smc_ism_init(); smc_clc_init(); - rc = smc_pnet_init(); + rc = smc_nl_init(); if (rc) goto out_pernet_subsys; + rc = smc_pnet_init(); + if (rc) + goto out_nl; + rc = -ENOMEM; smc_hs_wq = alloc_workqueue("smc_hs_wq", 0, 0); if (!smc_hs_wq) @@ -2569,6 +2574,8 @@ out_alloc_hs_wq: destroy_workqueue(smc_hs_wq); out_pnet: smc_pnet_exit(); +out_nl: + smc_nl_exit(); out_pernet_subsys: unregister_pernet_subsys(&smc_net_ops); @@ -2586,6 +2593,7 @@ static void __exit smc_exit(void) proto_unregister(&smc_proto6); proto_unregister(&smc_proto); smc_pnet_exit(); + smc_nl_exit(); unregister_pernet_subsys(&smc_net_ops); rcu_barrier(); } diff --git a/net/smc/smc_netlink.c b/net/smc/smc_netlink.c new file mode 100644 index 000000000000..4f964d03b372 --- /dev/null +++ b/net/smc/smc_netlink.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Shared Memory Communications over RDMA (SMC-R) and RoCE + * + * Generic netlink support functions to interact with SMC module + * + * Copyright IBM Corp. 2020 + * + * Author(s): Guvenc Gulce + */ + +#include +#include +#include +#include +#include +#include + +#include "smc_core.h" +#include "smc_netlink.h" + +#define SMC_CMD_MAX_ATTR 1 + +/* SMC_GENL generic netlink operation definition */ +static const struct genl_ops smc_gen_nl_ops[] = { +}; + +static const struct nla_policy smc_gen_nl_policy[2] = { + [SMC_CMD_MAX_ATTR] = { .type = NLA_REJECT, }, +}; + +/* SMC_GENL family definition */ +struct genl_family smc_gen_nl_family __ro_after_init = { + .hdrsize = 0, + .name = SMC_GENL_FAMILY_NAME, + .version = SMC_GENL_FAMILY_VERSION, + .maxattr = SMC_CMD_MAX_ATTR, + .policy = smc_gen_nl_policy, + .netnsok = true, + .module = THIS_MODULE, + .ops = smc_gen_nl_ops, + .n_ops = ARRAY_SIZE(smc_gen_nl_ops) +}; + +int __init smc_nl_init(void) +{ + return genl_register_family(&smc_gen_nl_family); +} + +void smc_nl_exit(void) +{ + genl_unregister_family(&smc_gen_nl_family); +} diff --git a/net/smc/smc_netlink.h b/net/smc/smc_netlink.h new file mode 100644 index 000000000000..0c757232c0d0 --- /dev/null +++ b/net/smc/smc_netlink.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Shared Memory Communications over RDMA (SMC-R) and RoCE + * + * SMC Generic netlink operations + * + * Copyright IBM Corp. 2020 + * + * Author(s): Guvenc Gulce + */ + +#ifndef _SMC_NETLINK_H +#define _SMC_NETLINK_H + +#include +#include + +extern struct genl_family smc_gen_nl_family; + +int smc_nl_init(void) __init; +void smc_nl_exit(void); + +#endif -- cgit v1.2.3