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cfg80211: add scan flag to indicate its priority

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Add NL80211_SCAN_FLAG_LOW_PRIORITY flag support. It tells drivers
that this is a low priority scan request, so that they can take
necessary action.
Drivers need to advertise low priority scan capability during
registration.

Signed-off-by: Sam Leffler <sleffler@chromium.org>
Tested-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Sam Leffler 2012-10-11 21:03:32 -07:00 committed by Johannes Berg
parent e8e27c668b
commit 46856bbf0f
2 changed files with 21 additions and 5 deletions
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10
include/uapi/linux/nl80211.h
View file

@ -3048,6 +3048,7 @@ enum nl80211_ap_sme_features {
* @NL80211_FEATURE_SAE: This driver supports simultaneous authentication of
* equals (SAE) with user space SME (NL80211_CMD_AUTHENTICATE) in station
* mode
* @NL80211_FEATURE_LOW_PRIORITY_SCAN: This driver supports low priority scan
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
@ -3056,6 +3057,7 @@ enum nl80211_feature_flags {
NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL = 1 << 4,
NL80211_FEATURE_SAE = 1 << 5,
NL80211_FEATURE_LOW_PRIORITY_SCAN = 1 << 6,
};
/**
@ -3096,9 +3098,11 @@ enum nl80211_connect_failed_reason {
* Scan request control flags are used to control the handling
* of NL80211_CMD_TRIGGER_SCAN and NL80211_CMD_START_SCHED_SCAN
* requests.
* (will be filled)
enum nl80211_scan_flags {
};
*
* @NL80211_SCAN_FLAG_LOW_PRIORITY: scan request has low priority
*/
enum nl80211_scan_flags {
NL80211_SCAN_FLAG_LOW_PRIORITY = 1<<0,
};
#endif /* __LINUX_NL80211_H */

16
net/wireless/nl80211.c
View file

@ -4368,9 +4368,15 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
}
}
if (info->attrs[NL80211_ATTR_SCAN_FLAGS])
if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
request->flags = nla_get_u32(
info->attrs[NL80211_ATTR_SCAN_FLAGS]);
if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
!(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
err = -EOPNOTSUPP;
goto out_free;
}
}
request->no_cck =
nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
@ -4603,9 +4609,15 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
request->ie_len);
}
if (info->attrs[NL80211_ATTR_SCAN_FLAGS])
if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
request->flags = nla_get_u32(
info->attrs[NL80211_ATTR_SCAN_FLAGS]);
if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
!(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
err = -EOPNOTSUPP;
goto out_free;
}
}
request->dev = dev;
request->wiphy = &rdev->wiphy;