Differential D20655 Diff 65132 head/sys/netinet/tcp_output.c

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head/sys/netinet/tcp_output.c

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#include "opt_inet.h"		#include "opt_inet.h"
#include "opt_inet6.h"		#include "opt_inet6.h"
#include "opt_ipsec.h"		#include "opt_ipsec.h"
#include "opt_kern_tls.h"		#include "opt_kern_tls.h"
#include "opt_tcpdebug.h"		#include "opt_tcpdebug.h"

#include <sys/param.h>		#include <sys/param.h>
#include <sys/systm.h>		#include <sys/systm.h>
		#include <sys/arb.h>
#include <sys/domain.h>		#include <sys/domain.h>
#ifdef TCP_HHOOK		#ifdef TCP_HHOOK
#include <sys/hhook.h>		#include <sys/hhook.h>
#endif		#endif
#include <sys/kernel.h>		#include <sys/kernel.h>
#ifdef KERN_TLS		#ifdef KERN_TLS
#include <sys/ktls.h>		#include <sys/ktls.h>
#endif		#endif
#include <sys/lock.h>		#include <sys/lock.h>
#include <sys/mbuf.h>		#include <sys/mbuf.h>
#include <sys/mutex.h>		#include <sys/mutex.h>
#include <sys/protosw.h>		#include <sys/protosw.h>
		#include <sys/qmath.h>
#include <sys/sdt.h>		#include <sys/sdt.h>
#include <sys/socket.h>		#include <sys/socket.h>
#include <sys/socketvar.h>		#include <sys/socketvar.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
		#include <sys/stats.h>

#include <net/if.h>		#include <net/if.h>
#include <net/route.h>		#include <net/route.h>
#include <net/vnet.h>		#include <net/vnet.h>

#include <netinet/in.h>		#include <netinet/in.h>
#include <netinet/in_kdtrace.h>		#include <netinet/in_kdtrace.h>
#include <netinet/in_systm.h>		#include <netinet/in_systm.h>
▲ Show 20 Lines • Show All 917 Lines • ▼ Show 20 Lines	/#endif/
* be transmitted, and initialize the header from		* be transmitted, and initialize the header from
* the template for sends on this connection.		* the template for sends on this connection.
*/		*/
if (len) {		if (len) {
struct mbuf *mb;		struct mbuf *mb;
struct sockbuf *msb;		struct sockbuf *msb;
u_int moff;		u_int moff;

if ((tp->t_flags & TF_FORCEDATA) && len == 1)		if ((tp->t_flags & TF_FORCEDATA) && len == 1) {
TCPSTAT_INC(tcps_sndprobe);		TCPSTAT_INC(tcps_sndprobe);
else if (SEQ_LT(tp->snd_nxt, tp->snd_max) \|\| sack_rxmit) {		#ifdef STATS
		if (SEQ_LT(tp->snd_nxt, tp->snd_max))
		stats_voi_update_abs_u32(tp->t_stats,
		VOI_TCP_RETXPB, len);
		else
		stats_voi_update_abs_u64(tp->t_stats,
		VOI_TCP_TXPB, len);
		#endif /* STATS */
		} else if (SEQ_LT(tp->snd_nxt, tp->snd_max) \|\| sack_rxmit) {
tp->t_sndrexmitpack++;		tp->t_sndrexmitpack++;
TCPSTAT_INC(tcps_sndrexmitpack);		TCPSTAT_INC(tcps_sndrexmitpack);
TCPSTAT_ADD(tcps_sndrexmitbyte, len);		TCPSTAT_ADD(tcps_sndrexmitbyte, len);
		#ifdef STATS
		stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RETXPB,
		len);
		#endif /* STATS */
} else {		} else {
TCPSTAT_INC(tcps_sndpack);		TCPSTAT_INC(tcps_sndpack);
TCPSTAT_ADD(tcps_sndbyte, len);		TCPSTAT_ADD(tcps_sndbyte, len);
		#ifdef STATS
		stats_voi_update_abs_u64(tp->t_stats, VOI_TCP_TXPB,
		len);
		#endif /* STATS */
}		}
#ifdef INET6		#ifdef INET6
if (MHLEN < hdrlen + max_linkhdr)		if (MHLEN < hdrlen + max_linkhdr)
m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);		m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
else		else
#endif		#endif
m = m_gethdr(M_NOWAIT, MT_DATA);		m = m_gethdr(M_NOWAIT, MT_DATA);

▲ Show 20 Lines • Show All 456 Lines • ▼ Show 20 Lines	if (SEQ_GT(tp->snd_nxt, tp->snd_max)) {
* Time this transmission if not a retransmission and		* Time this transmission if not a retransmission and
* not currently timing anything.		* not currently timing anything.
*/		*/
if (tp->t_rtttime == 0) {		if (tp->t_rtttime == 0) {
tp->t_rtttime = ticks;		tp->t_rtttime = ticks;
tp->t_rtseq = startseq;		tp->t_rtseq = startseq;
TCPSTAT_INC(tcps_segstimed);		TCPSTAT_INC(tcps_segstimed);
}		}
		#ifdef STATS
		if (!(tp->t_flags & TF_GPUTINPROG) && len) {
		tp->t_flags \|= TF_GPUTINPROG;
		tp->gput_seq = startseq;
		tp->gput_ack = startseq +
		ulmin(sbavail(&so->so_snd) - off, sendwin);
		tp->gput_ts = tcp_ts_getticks();
		}
		#endif /* STATS */
}		}

/*		/*
* Set retransmit timer if not currently set,		* Set retransmit timer if not currently set,
* and not doing a pure ack or a keep-alive probe.		* and not doing a pure ack or a keep-alive probe.
* Initial value for retransmit timer is smoothed		* Initial value for retransmit timer is smoothed
* round-trip time + 2 * round-trip time variance.		* round-trip time + 2 * round-trip time variance.
* Initialize shift counter which is used for backoff		* Initialize shift counter which is used for backoff
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