v4.19.13 snapshot.
diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c
new file mode 100644
index 0000000..53731e4
--- /dev/null
+++ b/net/dccp/sysctl.c
@@ -0,0 +1,118 @@
+/*
+ * net/dccp/sysctl.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@mandriva.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License v2
+ * as published by the Free Software Foundation.
+ */
+
+#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 zero = 0,
+ one = 1,
+ 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 = &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 = &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 = &one,
+ .extra2 = &u8_max,
+ },
+ {
+ .procname = "retries1",
+ .data = &sysctl_dccp_retries1,
+ .maxlen = sizeof(sysctl_dccp_retries1),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &zero,
+ .extra2 = &u8_max,
+ },
+ {
+ .procname = "retries2",
+ .data = &sysctl_dccp_retries2,
+ .maxlen = sizeof(sysctl_dccp_retries2),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &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 = &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;
+ }
+}