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cfg80211: introduce critical protocol indication from user-space

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Some protocols need a more reliable connection to complete
successful in reasonable time. This patch adds a user-space
API to indicate the wireless driver that a critical protocol
is about to commence and when it is done, using nl80211 primitives
NL80211_CMD_CRIT_PROTOCOL_START and NL80211_CRIT_PROTOCOL_STOP.

There can be only on critical protocol session started per
registered cfg80211 device.

The driver can support this by implementing the cfg80211 callbacks
.crit_proto_start() and .crit_proto_stop(). Examples of protocols
that can benefit from this are DHCP, EAPOL, APIPA. Exactly how the
link can/should be made more reliable is up to the driver. Things
to consider are avoid scanning, no multi-channel operations, and
alter coexistence schemes.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arend van Spriel
2013-04-18 15:49:00 +02:00
committed by Johannes Berg
parent a36473621c
commit 5de1798489
7 changed files with 245 additions and 1 deletions
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35
net/wireless/trace.h
View File

@@ -1806,6 +1806,41 @@ TRACE_EVENT(rdev_update_ft_ies,
WIPHY_PR_ARG, NETDEV_PR_ARG, __entry->md)
);
TRACE_EVENT(rdev_crit_proto_start,
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
enum nl80211_crit_proto_id protocol, u16 duration),
TP_ARGS(wiphy, wdev, protocol, duration),
TP_STRUCT__entry(
WIPHY_ENTRY
WDEV_ENTRY
__field(u16, proto)
__field(u16, duration)
),
TP_fast_assign(
WIPHY_ASSIGN;
WDEV_ASSIGN;
__entry->proto = protocol;
__entry->duration = duration;
),
TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT ", proto=%x, duration=%u",
WIPHY_PR_ARG, WDEV_PR_ARG, __entry->proto, __entry->duration)
);
TRACE_EVENT(rdev_crit_proto_stop,
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
TP_ARGS(wiphy, wdev),
TP_STRUCT__entry(
WIPHY_ENTRY
WDEV_ENTRY
),
TP_fast_assign(
WIPHY_ASSIGN;
WDEV_ASSIGN;
),
TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT,
WIPHY_PR_ARG, WDEV_PR_ARG)
);
/*************************************************************
* cfg80211 exported functions traces *
*************************************************************/