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authorGuvenc Gulce <guvenc@linux.ibm.com>2020-12-01 22:20:43 +0300
committerJakub Kicinski <kuba@kernel.org>2020-12-02 04:56:12 +0300
commite8372d9d21451a2f2947c2b63b5184f3d4d0bff9 (patch)
tree843ce28ae0c4dfb954930955542a606401ee6ea5 /net/smc/smc_netlink.c
parent49407ae2bc79da1ce29d6ff16c9acb45128b0bf6 (diff)
downloadlinux-e8372d9d21451a2f2947c2b63b5184f3d4d0bff9.tar.xz
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 <guvenc@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/smc/smc_netlink.c')
-rw-r--r--net/smc/smc_netlink.c53
1 files changed, 53 insertions, 0 deletions
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 <guvenc@linux.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/ctype.h>
+#include <linux/mutex.h>
+#include <linux/if.h>
+#include <linux/smc.h>
+
+#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);
+}