inpcb: do not copy so_options into inp_flags2

Since f71cb9f748 socket stays connnected with inpcb through latter's
lifetime and there is no reason to complicate things and copy these
flags.

Reviewed by:		markj
Differential Revision:	https://reviews.freebsd.org/D41198

sys/netinet/in_pcb.c

@@ -850,25 +850,6 @@ in_pcb_lport(struct inpcb *inp, struct in_addr *laddrp, u_short *lportp,
 	return (in_pcb_lport_dest(inp, laddrp ? (struct sockaddr *) &laddr :
 	    NULL, lportp, NULL, 0, cred, lookupflags));
 }
-
-/*
- * Return cached socket options.
- */
-int
-inp_so_options(const struct inpcb *inp)
-{
-	int so_options;
-
-	so_options = 0;
-
-	if ((inp->inp_flags2 & INP_REUSEPORT_LB) != 0)
-		so_options |= SO_REUSEPORT_LB;
-	if ((inp->inp_flags2 & INP_REUSEPORT) != 0)
-		so_options |= SO_REUSEPORT;
-	if ((inp->inp_flags2 & INP_REUSEADDR) != 0)
-		so_options |= SO_REUSEADDR;
-	return (so_options);
-}
 #endif /* INET || INET6 */
 
 #ifdef INET
@@ -979,16 +960,16 @@ in_pcbbind_setup(struct inpcb *inp, struct sockaddr_in *sin, in_addr_t *laddrp,
 				     ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
 				    (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
 				     ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
-				     (t->inp_flags2 & INP_REUSEPORT) ||
+				     (t->inp_socket->so_options & SO_REUSEPORT) ||
-				     (t->inp_flags2 & INP_REUSEPORT_LB) == 0) &&
+				     (t->inp_socket->so_options & SO_REUSEPORT_LB) == 0) &&
 				    (inp->inp_cred->cr_uid !=
 				     t->inp_cred->cr_uid))
 					return (EADDRINUSE);
 			}
 			t = in_pcblookup_local(pcbinfo, sin->sin_addr,
 			    lport, lookupflags, cred);
-			if (t != NULL && (reuseport & inp_so_options(t)) == 0 &&
+			if (t != NULL && (reuseport & t->inp_socket->so_options) == 0 &&
-			    (reuseport_lb & inp_so_options(t)) == 0) {
+			    (reuseport_lb & t->inp_socket->so_options) == 0) {
 #ifdef INET6
 				if (ntohl(sin->sin_addr.s_addr) !=
 				    INADDR_ANY ||
@@ -2658,7 +2639,7 @@ in_pcbinshash(struct inpcb *inp)
 	 * Add entry to load balance group.
 	 * Only do this if SO_REUSEPORT_LB is set.
 	 */
-	if ((inp->inp_flags2 & INP_REUSEPORT_LB) != 0) {
+	if ((inp->inp_socket->so_options & SO_REUSEPORT_LB) != 0) {
 		int error = in_pcbinslbgrouphash(inp, M_NODOM);
 		if (error != 0)
 			return (error);

sys/netinet/in_pcb.h

@@ -490,7 +490,6 @@ struct tcpcb *
 	inp_inpcbtotcpcb(struct inpcb *inp);
 void 	inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
 		uint32_t *faddr, uint16_t *fp);
-int	inp_so_options(const struct inpcb *inp);
 
 #endif /* _KERNEL */
 
@@ -597,9 +596,9 @@ int	inp_so_options(const struct inpcb *inp);
 /*				0x00000001 */
 /*				0x00000002 */
 /*				0x00000004 */
-#define	INP_REUSEPORT		0x00000008 /* SO_REUSEPORT option is set */
+/*				0x00000008 */
 /*				0x00000010 */
-#define	INP_REUSEADDR		0x00000020 /* SO_REUSEADDR option is set */
+/*				0x00000020 */
 /*				0x00000040 */
 /*				0x00000080 */
 #define	INP_RECVFLOWID		0x00000100 /* populate recv datagram with flow info */
@@ -607,7 +606,7 @@ int	inp_so_options(const struct inpcb *inp);
 #define	INP_RATE_LIMIT_CHANGED	0x00000400 /* rate limit needs attention */
 #define	INP_ORIGDSTADDR		0x00000800 /* receive IP dst address/port */
 /*				0x00001000 */
-#define	INP_REUSEPORT_LB	0x00002000 /* SO_REUSEPORT_LB option is set */
+/*				0x00002000 */
 /*				0x00004000 */
 /*				0x00008000 */
 /*				0x00010000 */

sys/netinet/ip_output.c

@@ -1084,33 +1084,6 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt)
 		if (sopt->sopt_level == SOL_SOCKET &&
 		    sopt->sopt_dir == SOPT_SET) {
 			switch (sopt->sopt_name) {
-			case SO_REUSEADDR:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEADDR) != 0)
-					inp->inp_flags2 |= INP_REUSEADDR;
-				else
-					inp->inp_flags2 &= ~INP_REUSEADDR;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
-			case SO_REUSEPORT:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEPORT) != 0)
-					inp->inp_flags2 |= INP_REUSEPORT;
-				else
-					inp->inp_flags2 &= ~INP_REUSEPORT;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
-			case SO_REUSEPORT_LB:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEPORT_LB) != 0)
-					inp->inp_flags2 |= INP_REUSEPORT_LB;
-				else
-					inp->inp_flags2 &= ~INP_REUSEPORT_LB;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
 			case SO_SETFIB:
 				INP_WLOCK(inp);
 				inp->inp_inc.inc_fibnum = so->so_fibnum;

sys/netinet6/in6_pcb.c

@@ -256,8 +256,8 @@ in6_pcbbind(struct inpcb *inp, struct sockaddr_in6 *sin6, struct ucred *cred)
 				     IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
 				    (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 				     !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
-				     (t->inp_flags2 & INP_REUSEPORT) ||
+				     (t->inp_socket->so_options & SO_REUSEPORT) ||
-				     (t->inp_flags2 & INP_REUSEPORT_LB) == 0) &&
+				     (t->inp_socket->so_options & SO_REUSEPORT_LB) == 0) &&
 				    (inp->inp_cred->cr_uid !=
 				     t->inp_cred->cr_uid))
 					return (EADDRINUSE);
@@ -283,8 +283,8 @@ in6_pcbbind(struct inpcb *inp, struct sockaddr_in6 *sin6, struct ucred *cred)
 			}
 			t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
 			    lport, lookupflags, cred);
-			if (t && (reuseport & inp_so_options(t)) == 0 &&
+			if (t && (reuseport & t->inp_socket->so_options) == 0 &&
-			    (reuseport_lb & inp_so_options(t)) == 0) {
+			    (reuseport_lb & t->inp_socket->so_options) == 0) {
 				return (EADDRINUSE);
 			}
 #ifdef INET
@@ -296,8 +296,8 @@ in6_pcbbind(struct inpcb *inp, struct sockaddr_in6 *sin6, struct ucred *cred)
 				t = in_pcblookup_local(pcbinfo, sin.sin_addr,
 				   lport, lookupflags, cred);
 				if (t &&
-				    (reuseport & inp_so_options(t)) == 0 &&
+				    (reuseport & t->inp_socket->so_options) == 0 &&
-				    (reuseport_lb & inp_so_options(t)) == 0 &&
+				    (reuseport_lb & t->inp_socket->so_options) == 0 &&
 				    (ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 				        (t->inp_vflag & INP_IPV6PROTO) != 0)) {
 					return (EADDRINUSE);

sys/netinet6/ip6_output.c

@@ -1641,33 +1641,6 @@ ip6_ctloutput(struct socket *so, struct sockopt *sopt)
 		if (sopt->sopt_level == SOL_SOCKET &&
 		    sopt->sopt_dir == SOPT_SET) {
 			switch (sopt->sopt_name) {
-			case SO_REUSEADDR:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEADDR) != 0)
-					inp->inp_flags2 |= INP_REUSEADDR;
-				else
-					inp->inp_flags2 &= ~INP_REUSEADDR;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
-			case SO_REUSEPORT:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEPORT) != 0)
-					inp->inp_flags2 |= INP_REUSEPORT;
-				else
-					inp->inp_flags2 &= ~INP_REUSEPORT;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
-			case SO_REUSEPORT_LB:
-				INP_WLOCK(inp);
-				if ((so->so_options & SO_REUSEPORT_LB) != 0)
-					inp->inp_flags2 |= INP_REUSEPORT_LB;
-				else
-					inp->inp_flags2 &= ~INP_REUSEPORT_LB;
-				INP_WUNLOCK(inp);
-				error = 0;
-				break;
 			case SO_SETFIB:
 				INP_WLOCK(inp);
 				inp->inp_inc.inc_fibnum = so->so_fibnum;