v4.19.13 snapshot.
diff --git a/include/net/netns/sctp.h b/include/net/netns/sctp.h
new file mode 100644
index 0000000..0db7fb3
--- /dev/null
+++ b/include/net/netns/sctp.h
@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NETNS_SCTP_H__
+#define __NETNS_SCTP_H__
+
+struct sock;
+struct proc_dir_entry;
+struct sctp_mib;
+struct ctl_table_header;
+
+struct netns_sctp {
+ DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
+
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_net_sctp;
+#endif
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_header *sysctl_header;
+#endif
+ /* This is the global socket data structure used for responding to
+ * the Out-of-the-blue (OOTB) packets. A control sock will be created
+ * for this socket at the initialization time.
+ */
+ struct sock *ctl_sock;
+
+ /* This is the global local address list.
+ * We actively maintain this complete list of addresses on
+ * the system by catching address add/delete events.
+ *
+ * It is a list of sctp_sockaddr_entry.
+ */
+ struct list_head local_addr_list;
+ struct list_head addr_waitq;
+ struct timer_list addr_wq_timer;
+ struct list_head auto_asconf_splist;
+ /* Lock that protects both addr_waitq and auto_asconf_splist */
+ spinlock_t addr_wq_lock;
+
+ /* Lock that protects the local_addr_list writers */
+ spinlock_t local_addr_lock;
+
+ /* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
+ *
+ * The following protocol parameters are RECOMMENDED:
+ *
+ * RTO.Initial - 3 seconds
+ * RTO.Min - 1 second
+ * RTO.Max - 60 seconds
+ * RTO.Alpha - 1/8 (3 when converted to right shifts.)
+ * RTO.Beta - 1/4 (2 when converted to right shifts.)
+ */
+ unsigned int rto_initial;
+ unsigned int rto_min;
+ unsigned int rto_max;
+
+ /* Note: rto_alpha and rto_beta are really defined as inverse
+ * powers of two to facilitate integer operations.
+ */
+ int rto_alpha;
+ int rto_beta;
+
+ /* Max.Burst - 4 */
+ int max_burst;
+
+ /* Whether Cookie Preservative is enabled(1) or not(0) */
+ int cookie_preserve_enable;
+
+ /* The namespace default hmac alg */
+ char *sctp_hmac_alg;
+
+ /* Valid.Cookie.Life - 60 seconds */
+ unsigned int valid_cookie_life;
+
+ /* Delayed SACK timeout 200ms default*/
+ unsigned int sack_timeout;
+
+ /* HB.interval - 30 seconds */
+ unsigned int hb_interval;
+
+ /* Association.Max.Retrans - 10 attempts
+ * Path.Max.Retrans - 5 attempts (per destination address)
+ * Max.Init.Retransmits - 8 attempts
+ */
+ int max_retrans_association;
+ int max_retrans_path;
+ int max_retrans_init;
+ /* Potentially-Failed.Max.Retrans sysctl value
+ * taken from:
+ * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
+ */
+ int pf_retrans;
+
+ /*
+ * Disable Potentially-Failed feature, the feature is enabled by default
+ * pf_enable - 0 : disable pf
+ * - >0 : enable pf
+ */
+ int pf_enable;
+
+ /*
+ * Policy for preforming sctp/socket accounting
+ * 0 - do socket level accounting, all assocs share sk_sndbuf
+ * 1 - do sctp accounting, each asoc may use sk_sndbuf bytes
+ */
+ int sndbuf_policy;
+
+ /*
+ * Policy for preforming sctp/socket accounting
+ * 0 - do socket level accounting, all assocs share sk_rcvbuf
+ * 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes
+ */
+ int rcvbuf_policy;
+
+ int default_auto_asconf;
+
+ /* Flag to indicate if addip is enabled. */
+ int addip_enable;
+ int addip_noauth;
+
+ /* Flag to indicate if PR-SCTP is enabled. */
+ int prsctp_enable;
+
+ /* Flag to indicate if PR-CONFIG is enabled. */
+ int reconf_enable;
+
+ /* Flag to indicate if SCTP-AUTH is enabled */
+ int auth_enable;
+
+ /* Flag to indicate if stream interleave is enabled */
+ int intl_enable;
+
+ /*
+ * Policy to control SCTP IPv4 address scoping
+ * 0 - Disable IPv4 address scoping
+ * 1 - Enable IPv4 address scoping
+ * 2 - Selectively allow only IPv4 private addresses
+ * 3 - Selectively allow only IPv4 link local address
+ */
+ int scope_policy;
+
+ /* Threshold for rwnd update SACKS. Receive buffer shifted this many
+ * bits is an indicator of when to send and window update SACK.
+ */
+ int rwnd_upd_shift;
+
+ /* Threshold for autoclose timeout, in seconds. */
+ unsigned long max_autoclose;
+};
+
+#endif /* __NETNS_SCTP_H__ */