110 SYSCTL_INT(_net_inet_tcp, OID_AUTO, tso, CTLFLAG_VNET | CTLFLAG_RW,
156     struct tcpopt *to, uint32_t len, int tso)  in hhook_run_tcp_est_out()  argument
165 		hhook_data.tso = tso;  in hhook_run_tcp_est_out()
208 	int tso, mtu;  in tcp_default_output()  local
275 	tso = 0;  in tcp_default_output()
520 	 * TSO may only be used if we are in a pure bulk sending state.  The  in tcp_default_output()
522 	 * retransmits prevent using TSO.  With TSO the TCP header is the same  in tcp_default_output()
535 	 * of IPsec that way and can actually decide if TSO is ok.  in tcp_default_output()
568 		tso = 1;  in tcp_default_output()
582 	 *	- We have a full segment (or more with TSO)  in tcp_default_output()
908 		if (tso) {  in tcp_default_output()
913 			/* extract TSO information */  in tcp_default_output()
919 			 * Limit a TSO burst to prevent it from  in tcp_default_output()
924 			    ("%s: TSO can't do IP options", __func__));  in tcp_default_output()
931 				/* compute maximum TSO length */  in tcp_default_output()
959 			 * don't use TSO:  in tcp_default_output()
964 				tso = 0;  in tcp_default_output()
970 			 * We don't trust the TSO implementations  in tcp_default_output()
997 		tso = 0;  in tcp_default_output()
1043 				if (tso) {  in tcp_default_output()
1104 				 * shorten it to no longer need tso. Lets  in tcp_default_output()
1108 				tso = 0;  in tcp_default_output()
1401 	 * Enable TSO and specify the size of the segments.  in tcp_default_output()
1404 	if (tso) {  in tcp_default_output()
1417 	hhook_run_tcp_est_out(tp, th, &to, len, tso);  in tcp_default_output()
1711 			 * If TSO was active we either got an interface  in tcp_default_output()
1712 			 * without TSO capabilits or TSO was turned off.  in tcp_default_output()
1716 			if (tso)  in tcp_default_output()
1966  * This is a copy of m_copym(), taking the TSO segment size/limit