- Rename cc.h to more meaningful tcp_cc.h.

- Declare it a kernel only include, which it already is.
- Don't include tcp.h implicitly from tcp_cc.h

sys/netinet/cc/cc.c

@@ -65,10 +65,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_pcb.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_var.h>
+#include <netinet/tcp_cc.h>
 
 #include <netinet/cc/cc_module.h>
 

sys/netinet/cc/cc_cdg.c

@@ -65,11 +65,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 #include <netinet/khelp/h_ertt.h>

sys/netinet/cc/cc_chd.c

@@ -67,11 +67,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 #include <netinet/khelp/h_ertt.h>

sys/netinet/cc/cc_cubic.c

@@ -59,11 +59,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_cubic.h>
 #include <netinet/cc/cc_module.h>
 

sys/netinet/cc/cc_dctcp.c

@@ -50,10 +50,10 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 #define	CAST_PTR_INT(X)	(*((int*)(X)))

sys/netinet/cc/cc_hd.c

@@ -68,11 +68,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 #include <netinet/khelp/h_ertt.h>

sys/netinet/cc/cc_htcp.c

@@ -62,11 +62,11 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 /* Fixed point math shifts. */

sys/netinet/cc/cc_newreno.c

@@ -62,10 +62,10 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 static void	newreno_ack_received(struct cc_var *ccv, uint16_t type);

sys/netinet/cc/cc_vegas.c

@@ -69,11 +69,10 @@ __FBSDID("$FreeBSD$");
 
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
-#include <netinet/tcp_seq.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
-
+#include <netinet/tcp_cc.h>
 #include <netinet/cc/cc_module.h>
 
 #include <netinet/khelp/h_ertt.h>

sys/netinet/tcp_cc.h

@@ -48,11 +48,12 @@
  *   http://caia.swin.edu.au/urp/newtcp/
  */
 
-#ifndef _NETINET_CC_H_
-#define _NETINET_CC_H_
+#ifndef _NETINET_TCP_CC_H_
+#define _NETINET_TCP_CC_H_
 
-/* XXX: TCP_CA_NAME_MAX define lives in tcp.h for compat reasons. */
-#include <netinet/tcp.h>
+#if !defined(_KERNEL)
+#error "no user-servicable parts inside"
+#endif
 
 /* Global CC vars. */
 extern STAILQ_HEAD(cc_head, cc_algo) cc_list;
@@ -171,4 +172,4 @@ extern struct rwlock cc_list_lock;
 #define	CC_LIST_WUNLOCK()	rw_wunlock(&cc_list_lock)
 #define	CC_LIST_LOCK_ASSERT()	rw_assert(&cc_list_lock, RA_LOCKED)
 
-#endif /* _NETINET_CC_H_ */
+#endif /* _NETINET_TCP_CC_H_ */

sys/netinet/tcp_input.c

@@ -82,7 +82,6 @@ __FBSDID("$FreeBSD$");
 
 #define TCPSTATES		/* for logging */
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_pcb.h>
@@ -101,12 +100,14 @@ __FBSDID("$FreeBSD$");
 #ifdef TCP_RFC7413
 #include <netinet/tcp_fastopen.h>
 #endif
+#include <netinet/tcp.h>
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #include <netinet6/tcp6_var.h>
 #include <netinet/tcpip.h>
+#include <netinet/tcp_cc.h>
 #ifdef TCPPCAP
 #include <netinet/tcp_pcap.h>
 #endif

sys/netinet/tcp_output.c

@@ -55,7 +55,6 @@ __FBSDID("$FreeBSD$");
 #include <net/route.h>
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_systm.h>
@@ -71,12 +70,14 @@ __FBSDID("$FreeBSD$");
 #ifdef TCP_RFC7413
 #include <netinet/tcp_fastopen.h>
 #endif
+#include <netinet/tcp.h>
 #define	TCPOUTFLAGS
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #include <netinet/tcpip.h>
+#include <netinet/tcp_cc.h>
 #ifdef TCPPCAP
 #include <netinet/tcp_pcap.h>
 #endif

sys/netinet/tcp_stacks/fastpath.c

@@ -86,7 +86,6 @@ __FBSDID("$FreeBSD$");
 
 #define TCPSTATES		/* for logging */
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_pcb.h>
@@ -100,6 +99,7 @@ __FBSDID("$FreeBSD$");
 #include <netinet/icmp6.h>
 #include <netinet6/in6_pcb.h>
 #include <netinet6/ip6_var.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
@@ -107,6 +107,7 @@ __FBSDID("$FreeBSD$");
 #include <netinet6/tcp6_var.h>
 #include <netinet/tcpip.h>
 #include <netinet/tcp_syncache.h>
+#include <netinet/tcp_cc.h>
 #ifdef TCPDEBUG
 #include <netinet/tcp_debug.h>
 #endif /* TCPDEBUG */

sys/netinet/tcp_subr.c

@@ -68,7 +68,6 @@ __FBSDID("$FreeBSD$");
 #include <net/if_var.h>
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_pcb.h>
@@ -88,11 +87,13 @@ __FBSDID("$FreeBSD$");
 #ifdef TCP_RFC7413
 #include <netinet/tcp_fastopen.h>
 #endif
+#include <netinet/tcp.h>
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #include <netinet/tcp_syncache.h>
+#include <netinet/tcp_cc.h>
 #ifdef INET6
 #include <netinet6/tcp6_var.h>
 #endif

sys/netinet/tcp_timer.c

@@ -55,7 +55,6 @@ __FBSDID("$FreeBSD$");
 #include <net/vnet.h>
 #include <net/netisr.h>
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_pcb.h>
@@ -65,9 +64,11 @@ __FBSDID("$FreeBSD$");
 #include <netinet6/in6_pcb.h>
 #endif
 #include <netinet/ip_var.h>
+#include <netinet/tcp.h>
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
+#include <netinet/tcp_cc.h>
 #ifdef INET6
 #include <netinet6/tcp6_var.h>
 #endif

sys/netinet/tcp_usrreq.c

@@ -69,7 +69,6 @@ __FBSDID("$FreeBSD$");
 #include <net/route.h>
 #include <net/vnet.h>
 
-#include <netinet/cc.h>
 #include <netinet/in.h>
 #include <netinet/in_kdtrace.h>
 #include <netinet/in_pcb.h>
@@ -85,11 +84,13 @@ __FBSDID("$FreeBSD$");
 #ifdef TCP_RFC7413
 #include <netinet/tcp_fastopen.h>
 #endif
+#include <netinet/tcp.h>
 #include <netinet/tcp_fsm.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #include <netinet/tcpip.h>
+#include <netinet/tcp_cc.h>
 #ifdef TCPPCAP
 #include <netinet/tcp_pcap.h>
 #endif