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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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24
net/wireless/rdev-ops.h
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@@ -875,7 +875,7 @@ static inline void rdev_stop_p2p_device(struct cfg80211_registered_device *rdev,
trace_rdev_stop_p2p_device(&rdev->wiphy, wdev);
rdev->ops->stop_p2p_device(&rdev->wiphy, wdev);
trace_rdev_return_void(&rdev->wiphy);
}
}
static inline int rdev_set_mac_acl(struct cfg80211_registered_device *rdev,
struct net_device *dev,
@@ -901,4 +901,26 @@ static inline int rdev_update_ft_ies(struct cfg80211_registered_device *rdev,
return ret;
}
static inline int rdev_crit_proto_start(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_crit_proto_id protocol,
u16 duration)
{
int ret;
trace_rdev_crit_proto_start(&rdev->wiphy, wdev, protocol, duration);
ret = rdev->ops->crit_proto_start(&rdev->wiphy, wdev,
protocol, duration);
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}
static inline void rdev_crit_proto_stop(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev)
{
trace_rdev_crit_proto_stop(&rdev->wiphy, wdev);
rdev->ops->crit_proto_stop(&rdev->wiphy, wdev);
trace_rdev_return_void(&rdev->wiphy);
}
#endif /* __CFG80211_RDEV_OPS */