Using -current on a Fujitsu Lifebook N5010 (no Atheros 802.11,
no Ethernet, + hard freezes)
sam at errno.com
Wed Jul 21 09:06:00 PDT 2004
On Wednesday 21 July 2004 12:04 am, Julian Elischer wrote:
> Jake Hamby wrote:
> > * Now uses four transmission queues of varying priority instead of
> > one: WME_AC_BE (highest), WME_AC_BK, WME_AC_VI, and WME_AC_VO
> > (lowest). There is code in the Linux version to support QOS and
> > insert outgoing packets into queue by priority, but I couldn't find
> > the equivalent of the priority field from Linux's sk_buff struct in
> > FreeBSD's equivalent ieee80211_frame struct. Currently all outgoing
> > packets go to WME_AC_BE, except packets of type
> > IEEE80211_FC0_TYPE_MGT, which go to WME_AC_VO.
> FreeBSD would store that information in what is called an mbuf tag.
> A separate small chunk of ram tagged onto teh first mbuf of the packet.
> This is relatively new and there is only just starting to be some
> use of it.. Official QOS support in the kernel does not exist yet.
> (though there are some sporadic users of priority tags here and there
> it is not general yet.)
I backported the madwifi code and handled this with a hack. The net80211
layer parses the IP TOS bits to map to WME AC's. Since there are only 4 AC's
to map to and the info is passed directly to the drivers under the net80211
layer I encoded them in the mbuf M_PROTO bits instead of using an m_tag.
I've already sent Jake a copy of my (unfinished) work in the hopes he'll see
it through to commit-ready form.
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