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Make TSO (TCP segmentation offload) capabilities visible and accessible with

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'ifconfig em0 tso' and 'ifconfig em0 -tso'.  TSO for IPv4 and IPv6 is always
enabled or disabled together.  The driver may enable only one if it doesn't
support both.

Document 'tso' and '-tso' in the ifconfig(8) man pages.

Sponsored by:	TCP/IP Optimization Fundraise 2005
This commit is contained in:
Andre Oppermann 2006-09-06 22:07:14 +00:00
parent e7d33dcbc5
commit d7097da403
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=162088
2 changed files with 20 additions and 1 deletions
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17
sbin/ifconfig/ifconfig.8
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@ -356,6 +356,23 @@ support, the exact level of offloading varies between drivers.
If the driver supports user-configurable checksum offloading,
disable receive (or transmit) checksum offloading on the interface.
These settings may not always be independent of each other.
.It Cm tso
If the driver supports
.Xr tcp 4
segmentation offloading, enable TSO on the interface.
Some drivers may not be able to support TSO for
.Xr ip 4
and
.Xr ip6 4
packets, so they may enable only one of them.
.It Fl tso
If the driver supports
.Xr tcp 4
segmentation offloading, disable TSO on the interface.
It will always disable TSO for
.Xr ip 4
and
.Xr ip6 4 .
.It Cm vlanmtu , vlanhwtag
If the driver offers user-configurable VLAN support, enable
reception of extended frames or tag processing in hardware,

4
sbin/ifconfig/ifconfig.c
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@ -805,7 +805,7 @@ rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
#define IFCAPBITS \
"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
"\10VLAN_HWCSUM"
"\8TSO4\9TSO6\10VLAN_HWCSUM"
/*
* Print the status of the interface. If an address family was
@ -1035,6 +1035,8 @@ static struct cmd basic_cmds[] = {
DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
DEF_CMD("polling", IFCAP_POLLING, setifcap),
DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
DEF_CMD("tso", IFCAP_TSO, setifcap),
DEF_CMD("-tso", -IFCAP_TSO, setifcap),
DEF_CMD("normal", -IFF_LINK0, setifflags),
DEF_CMD("compress", IFF_LINK0, setifflags),
DEF_CMD("noicmp", IFF_LINK1, setifflags),