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cfg80211/mac80211: refactor cfg80211_chandef_dfs_required()

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Some interface types don't require DFS (such as STATION, P2P_CLIENT
etc).  In order to centralize these decisions, make
cfg80211_chandef_dfs_required() take the iftype into consideration.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho
2014-02-18 11:40:36 +02:00
committed by Johannes Berg
parent cb2d956dd3
commit 2beb6dab2d
6 changed files with 104 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/wireless/chan.c
+56 -18
View File
@@ -326,28 +326,57 @@ static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
const struct cfg80211_chan_def *chandef)
const struct cfg80211_chan_def *chandef,
enum nl80211_iftype iftype)
{
int width;
int r;
int ret;
if (WARN_ON(!cfg80211_chandef_valid(chandef)))
return -EINVAL;
width = cfg80211_chandef_get_width(chandef);
if (width < 0)
return -EINVAL;
switch (iftype) {
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
case NL80211_IFTYPE_MESH_POINT:
width = cfg80211_chandef_get_width(chandef);
if (width < 0)
return -EINVAL;
r = cfg80211_get_chans_dfs_required(wiphy, chandef->center_freq1,
width);
if (r)
return r;
ret = cfg80211_get_chans_dfs_required(wiphy,
chandef->center_freq1,
width);
if (ret < 0)
return ret;
else if (ret > 0)
return BIT(chandef->width);
if (!chandef->center_freq2)
return 0;
if (!chandef->center_freq2)
return 0;
return cfg80211_get_chans_dfs_required(wiphy, chandef->center_freq2,
width);
ret = cfg80211_get_chans_dfs_required(wiphy,
chandef->center_freq2,
width);
if (ret < 0)
return ret;
else if (ret > 0)
return BIT(chandef->width);
break;
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_WDS:
case NL80211_IFTYPE_P2P_DEVICE:
case NL80211_IFTYPE_UNSPECIFIED:
break;
case NUM_NL80211_IFTYPES:
WARN_ON(1);
}
return 0;
}
EXPORT_SYMBOL(cfg80211_chandef_dfs_required);
@@ -749,7 +778,8 @@ bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
!cfg80211_go_permissive_chan(rdev, chandef->chan))
prohibited_flags |= IEEE80211_CHAN_NO_IR;
if (cfg80211_chandef_dfs_required(wiphy, chandef) > 0 &&
if (cfg80211_chandef_dfs_required(wiphy, chandef,
NL80211_IFTYPE_UNSPECIFIED) > 0 &&
cfg80211_chandef_dfs_available(wiphy, chandef)) {
/* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */
prohibited_flags = IEEE80211_CHAN_DISABLED;
@@ -779,6 +809,8 @@ cfg80211_get_chan_state(struct wireless_dev *wdev,
enum cfg80211_chan_mode *chanmode,
u8 *radar_detect)
{
int ret;
*chan = NULL;
*chanmode = CHAN_MODE_UNDEFINED;
@@ -821,8 +853,11 @@ cfg80211_get_chan_state(struct wireless_dev *wdev,
*chan = wdev->chandef.chan;
*chanmode = CHAN_MODE_SHARED;
if (cfg80211_chandef_dfs_required(wdev->wiphy,
&wdev->chandef))
ret = cfg80211_chandef_dfs_required(wdev->wiphy,
&wdev->chandef,
wdev->iftype);
WARN_ON(ret < 0);
if (ret > 0)
*radar_detect |= BIT(wdev->chandef.width);
}
return;
@@ -831,8 +866,11 @@ cfg80211_get_chan_state(struct wireless_dev *wdev,
*chan = wdev->chandef.chan;
*chanmode = CHAN_MODE_SHARED;
if (cfg80211_chandef_dfs_required(wdev->wiphy,
&wdev->chandef))
ret = cfg80211_chandef_dfs_required(wdev->wiphy,
&wdev->chandef,
wdev->iftype);
WARN_ON(ret < 0);
if (ret > 0)
*radar_detect |= BIT(wdev->chandef.width);
}
return;