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Code Issues Releases Activity

VNET virtualize tcp_sendspace/tcp_recvspace and change the

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type to INT.  A long is not necessary as the TCP window is
limited to 2**30.  A larger initial window isn't useful.

MFC after:	1 week
This commit is contained in:
Andre Oppermann 2011-10-16 15:08:43 +00:00
parent 36daf0495a
commit e233e2acb3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=226437
3 changed files with 16 additions and 11 deletions
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4
sys/netinet/tcp_input.c
View File

@ -3517,7 +3517,7 @@ tcp_mss(struct tcpcb *tp, int offer)
*/
so = inp->inp_socket;
SOCKBUF_LOCK(&so->so_snd);
if ((so->so_snd.sb_hiwat == tcp_sendspace) && metrics.rmx_sendpipe)
if ((so->so_snd.sb_hiwat == V_tcp_sendspace) && metrics.rmx_sendpipe)
bufsize = metrics.rmx_sendpipe;
else
bufsize = so->so_snd.sb_hiwat;
@ -3534,7 +3534,7 @@ tcp_mss(struct tcpcb *tp, int offer)
tp->t_maxseg = mss;
SOCKBUF_LOCK(&so->so_rcv);
if ((so->so_rcv.sb_hiwat == tcp_recvspace) && metrics.rmx_recvpipe)
if ((so->so_rcv.sb_hiwat == V_tcp_recvspace) && metrics.rmx_recvpipe)
bufsize = metrics.rmx_recvpipe;
else
bufsize = so->so_rcv.sb_hiwat;

17
sys/netinet/tcp_usrreq.c
View File

@ -1501,12 +1501,15 @@ tcp_ctloutput(struct socket *so, struct sockopt *sopt)
* Set the initial send and receive socket buffer sizes for
* newly created TCP sockets.
*/
u_long tcp_sendspace = 1024*32;
SYSCTL_ULONG(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace, CTLFLAG_RW,
&tcp_sendspace , 0, "Initial send socket buffer size");
u_long tcp_recvspace = 1024*64;
SYSCTL_ULONG(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
&tcp_recvspace , 0, "Initial receive socket buffer size");
VNET_DEFINE(int, tcp_sendspace) = 1024*32;
#define V_tcp_sendspace VNET(tcp_sendspace)
SYSCTL_VNET_INT(_net_inet_tcp, TCPCTL_SENDSPACE, tcp_sendspace, CTLFLAG_RW,
&VNET_NAME(tcp_sendspace), 0, "Initial send socket buffer size");
VNET_DEFINE(int, tcp_recvspace) = 1024*64
#define V_tcp_recvspace VNET(tcp_recvspace)
SYSCTL_VNET_INT(_net_inet_tcp, TCPCTL_RECVSPACE, tcp_recvspace, CTLFLAG_RW,
&VNET_NAME(tcp_recvspace), 0, "Initial receive socket buffer size");
/*
* Attach TCP protocol to socket, allocating
@ -1521,7 +1524,7 @@ tcp_attach(struct socket *so)
int error;
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
error = soreserve(so, tcp_sendspace, tcp_recvspace);
error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace);
if (error)
return (error);
}

6
sys/netinet/tcp_var.h
View File

@ -606,6 +606,8 @@ VNET_DECLARE(int, tcp_mssdflt); /* XXX */
VNET_DECLARE(int, tcp_minmss);
VNET_DECLARE(int, tcp_delack_enabled);
VNET_DECLARE(int, tcp_do_rfc3390);
VNET_DECLARE(int, tcp_sendspace);
VNET_DECLARE(int, tcp_recvspace);
VNET_DECLARE(int, path_mtu_discovery);
VNET_DECLARE(int, ss_fltsz);
VNET_DECLARE(int, ss_fltsz_local);
@ -618,6 +620,8 @@ VNET_DECLARE(int, tcp_abc_l_var);
#define V_tcp_minmss VNET(tcp_minmss)
#define V_tcp_delack_enabled VNET(tcp_delack_enabled)
#define V_tcp_do_rfc3390 VNET(tcp_do_rfc3390)
#define V_tcp_sendspace VNET(tcp_sendspace)
#define V_tcp_recvspace VNET(tcp_recvspace)
#define V_path_mtu_discovery VNET(path_mtu_discovery)
#define V_ss_fltsz VNET(ss_fltsz)
#define V_ss_fltsz_local VNET(ss_fltsz_local)
@ -716,8 +720,6 @@ void tcp_hc_updatemtu(struct in_conninfo *, u_long);
void tcp_hc_update(struct in_conninfo *, struct hc_metrics_lite *);
extern struct pr_usrreqs tcp_usrreqs;
extern u_long tcp_sendspace;
extern u_long tcp_recvspace;
tcp_seq tcp_new_isn(struct tcpcb *);
void tcp_sack_doack(struct tcpcb *, struct tcpopt *, tcp_seq);