From: Johannes Berg <johannes@sipsolutions.net>
To: Michal Kazior <michal.kazior@tieto.com>
Cc: Luca Coelho <luca@coelho.fi>,
linux-wireless <linux-wireless@vger.kernel.org>,
"Otcheretianski, Andrei" <andrei.otcheretianski@intel.com>
Subject: Re: [PATCH 5/7] mac80211: improve CSA locking
Date: Thu, 23 Jan 2014 13:09:21 +0100 [thread overview]
Message-ID: <1390478961.4142.12.camel@jlt4.sipsolutions.net> (raw)
In-Reply-To: <CA+BoTQn-wjQYfUVxJU+xOUoANKE=8ajmq=ytmzAqVuiqMXJj=w@mail.gmail.com> (sfid-20140123_085715_974773_1D88AF38)
On Thu, 2014-01-23 at 08:57 +0100, Michal Kazior wrote:
> This is actually the tricky part. How do you automatically switch an
> AP interface? You should be able to at least generate CSA IE - true -
> but what about beacon after CSA? You need to update HT IE and VHT IE
> at least.
>
> Perhaps we could split CSA into two parts somehow and make it more
> userspace coordinated. The first part of CSA - announcing it, is
> trivial and can actually be done entirely within mac80211 if I'm not
> mistaken. What needs userspace input is what happens after the
> announcement. This would mean that there is a possible time gap
> between announcement being completed and the actual channel switch &
> operation resuming.
I believe that even announcing it isn't necessarily possible without
userspace involvement, particularly for things like 11ac's channel
switch wrapper IE and/or operating class changes.
johannes
next prev parent reply other threads:[~2014-01-23 12:09 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-20 14:21 [PATCH 0/7] mac80211: CSA related fixes Michal Kazior
2014-01-20 14:21 ` [PATCH 1/7] mac80211: fix possible memory leak on AP CSA failure Michal Kazior
2014-01-21 14:55 ` Johannes Berg
2014-01-22 6:54 ` Michal Kazior
2014-01-20 14:21 ` [PATCH 2/7] mac80211: treat IBSS CSA finish failure seriously Michal Kazior
2014-01-21 15:00 ` Johannes Berg
2014-01-22 11:38 ` Luca Coelho
2014-01-20 14:21 ` [PATCH 3/7] mac80211: move csa_active setting in STA CSA Michal Kazior
2014-01-22 11:40 ` Luca Coelho
2014-01-20 14:21 ` [PATCH 4/7] mac80211: fix sdata->radar_required locking Michal Kazior
2014-01-20 14:21 ` [PATCH 5/7] mac80211: improve CSA locking Michal Kazior
2014-01-20 15:41 ` Michal Kazior
2014-01-21 15:06 ` Johannes Berg
2014-01-22 6:51 ` Michal Kazior
2014-01-22 8:52 ` Johannes Berg
2014-01-22 9:07 ` Michal Kazior
2014-01-22 9:13 ` Johannes Berg
2014-01-22 10:13 ` Michal Kazior
2014-01-22 10:19 ` Johannes Berg
2014-01-22 12:36 ` Luca Coelho
2014-01-22 15:10 ` Johannes Berg
2014-01-22 15:13 ` Luca Coelho
2014-01-23 6:22 ` Michal Kazior
2014-01-23 6:31 ` Luca Coelho
2014-01-23 6:41 ` Michal Kazior
2014-01-23 7:31 ` Luca Coelho
2014-01-23 7:50 ` Otcheretianski, Andrei
2014-01-23 7:57 ` Michal Kazior
2014-01-23 9:50 ` Luca Coelho
2014-01-23 10:33 ` Michal Kazior
2014-01-23 12:20 ` Johannes Berg
2014-01-23 12:38 ` Michal Kazior
2014-01-24 7:41 ` Luca Coelho
2014-01-24 8:40 ` Johannes Berg
2014-01-24 9:52 ` Luca Coelho
2014-01-24 10:40 ` Michal Kazior
2014-01-24 12:55 ` Luca Coelho
2014-01-23 12:09 ` Johannes Berg [this message]
2014-01-23 12:41 ` Michal Kazior
2014-01-24 7:44 ` Luca Coelho
2014-01-23 6:35 ` Luca Coelho
2014-01-23 12:07 ` Johannes Berg
2014-01-23 6:35 ` Michal Kazior
2014-01-23 12:06 ` Johannes Berg
2014-01-20 14:21 ` [PATCH 6/7] mac80211: deny attempts at using chanctx during CSA Michal Kazior
2014-01-20 21:41 ` Luca Coelho
2014-01-21 6:07 ` Michal Kazior
2014-01-21 15:14 ` Johannes Berg
2014-01-20 14:21 ` [PATCH 7/7] Revert "cfg80211: disable CSA for all drivers" Michal Kazior
2014-01-21 15:16 ` [PATCH 0/7] mac80211: CSA related fixes Johannes Berg
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