af_rxrpc: Add sysctls for configuring RxRPC parameters

[karo-tx-linux.git] / net / rxrpc / sysctl.c

diff --git a/net/rxrpc/sysctl.c b/net/rxrpc/sysctl.c
new file mode 100644 (file)
index 0000000..cdc85e7
--- /dev/null
+++ b/net/rxrpc/sysctl.c
@@ -0,0 +1,113 @@
+/* sysctls for configuring RxRPC operating parameters
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/sysctl.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+static struct ctl_table_header *rxrpc_sysctl_reg_table;
+static const unsigned zero = 0;
+static const unsigned one = 1;
+
+/*
+ * RxRPC operating parameters.
+ *
+ * See Documentation/networking/rxrpc.txt and the variable definitions for more
+ * information on the individual parameters.
+ */
+static struct ctl_table rxrpc_sysctl_table[] = {
+       /* Values measured in milliseconds */
+       {
+               .procname       = "req_ack_delay",
+               .data           = &rxrpc_requested_ack_delay,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_ms_jiffies,
+               .extra1         = (void *)&zero,
+       },
+       {
+               .procname       = "soft_ack_delay",
+               .data           = &rxrpc_soft_ack_delay,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_ms_jiffies,
+               .extra1         = (void *)&one,
+       },
+       {
+               .procname       = "idle_ack_delay",
+               .data           = &rxrpc_idle_ack_delay,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_ms_jiffies,
+               .extra1         = (void *)&one,
+       },
+       {
+               .procname       = "resend_timeout",
+               .data           = &rxrpc_resend_timeout,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_ms_jiffies,
+               .extra1         = (void *)&one,
+       },
+
+       /* Values measured in seconds but used in jiffies */
+       {
+               .procname       = "max_call_lifetime",
+               .data           = &rxrpc_max_call_lifetime,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_jiffies,
+               .extra1         = (void *)&one,
+       },
+       {
+               .procname       = "dead_call_expiry",
+               .data           = &rxrpc_dead_call_expiry,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_jiffies,
+               .extra1         = (void *)&one,
+       },
+
+       /* Values measured in seconds */
+       {
+               .procname       = "connection_expiry",
+               .data           = &rxrpc_connection_expiry,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = (void *)&one,
+       },
+       {
+               .procname       = "transport_expiry",
+               .data           = &rxrpc_transport_expiry,
+               .maxlen         = sizeof(unsigned),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = (void *)&one,
+       },
+       { }
+};
+
+int __init rxrpc_sysctl_init(void)
+{
+       rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
+                                                    rxrpc_sysctl_table);
+       if (!rxrpc_sysctl_reg_table)
+               return -ENOMEM;
+       return 0;
+}
+
+void rxrpc_sysctl_exit(void)
+{
+       if (rxrpc_sysctl_reg_table)
+               unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
+}