1 files changed, 113 insertions, 0 deletions
diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c
new file mode 100644
index 000000000..ee8d4f5af
--- /dev/null
+++ b/net/dccp/sysctl.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  net/dccp/sysctl.c
+ *
+ *  An implementation of the DCCP protocol
+ *  Arnaldo Carvalho de Melo <acme@mandriva.com>
+ */
+
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include "dccp.h"
+#include "feat.h"
+
+#ifndef CONFIG_SYSCTL
+#error This file should not be compiled without CONFIG_SYSCTL defined
+#endif
+
+/* Boundary values */
+static int		u8_max   = 0xFF;
+static unsigned long	seqw_min = DCCPF_SEQ_WMIN,
+			seqw_max = 0xFFFFFFFF;		/* maximum on 32 bit */
+
+static struct ctl_table dccp_default_table[] = {
+	{
+		.procname	= "seq_window",
+		.data		= &sysctl_dccp_sequence_window,
+		.maxlen		= sizeof(sysctl_dccp_sequence_window),
+		.mode		= 0644,
+		.proc_handler	= proc_doulongvec_minmax,
+		.extra1		= &seqw_min,		/* RFC 4340, 7.5.2 */
+		.extra2		= &seqw_max,
+	},
+	{
+		.procname	= "rx_ccid",
+		.data		= &sysctl_dccp_rx_ccid,
+		.maxlen		= sizeof(sysctl_dccp_rx_ccid),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &u8_max,		/* RFC 4340, 10. */
+	},
+	{
+		.procname	= "tx_ccid",
+		.data		= &sysctl_dccp_tx_ccid,
+		.maxlen		= sizeof(sysctl_dccp_tx_ccid),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &u8_max,		/* RFC 4340, 10. */
+	},
+	{
+		.procname	= "request_retries",
+		.data		= &sysctl_dccp_request_retries,
+		.maxlen		= sizeof(sysctl_dccp_request_retries),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ONE,
+		.extra2		= &u8_max,
+	},
+	{
+		.procname	= "retries1",
+		.data		= &sysctl_dccp_retries1,
+		.maxlen		= sizeof(sysctl_dccp_retries1),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &u8_max,
+	},
+	{
+		.procname	= "retries2",
+		.data		= &sysctl_dccp_retries2,
+		.maxlen		= sizeof(sysctl_dccp_retries2),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= &u8_max,
+	},
+	{
+		.procname	= "tx_qlen",
+		.data		= &sysctl_dccp_tx_qlen,
+		.maxlen		= sizeof(sysctl_dccp_tx_qlen),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+	},
+	{
+		.procname	= "sync_ratelimit",
+		.data		= &sysctl_dccp_sync_ratelimit,
+		.maxlen		= sizeof(sysctl_dccp_sync_ratelimit),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_ms_jiffies,
+	},
+
+	{ }
+};
+
+static struct ctl_table_header *dccp_table_header;
+
+int __init dccp_sysctl_init(void)
+{
+	dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default",
+			dccp_default_table);
+
+	return dccp_table_header != NULL ? 0 : -ENOMEM;
+}
+
+void dccp_sysctl_exit(void)
+{
+	if (dccp_table_header != NULL) {
+		unregister_net_sysctl_table(dccp_table_header);
+		dccp_table_header = NULL;
+	}
+}