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cfg80211: provide channel to join_mesh function

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Just like the AP mode patch, instead of setting
the channel and then joining the mesh network,
provide the channel to join the network on to
the join_mesh() function.

Like in AP mode, you can also give the channel
to the join-mesh nl80211 command now.

Unlike AP mode, it picks a default channel if
none was given.

As libertas uses mesh mode interfaces but has
no join_mesh callback and we can't simply break
it, keep some compatibility code for that case
and configure the channel directly for it.

In the non-libertas case, where we store the
channel until join, allow setting it while the
interface is down.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2012-05-16 23:50:20 +02:00
committed by John W. Linville
parent 685d12a192
commit cc1d2806bf
6 changed files with 148 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
net/wireless/mesh.c
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@@ -65,6 +65,9 @@ const struct mesh_config default_mesh_config = {
};
const struct mesh_setup default_mesh_setup = {
/* cfg80211_join_mesh() will pick a channel if needed */
.channel = NULL,
.channel_type = NL80211_CHAN_NO_HT,
.sync_method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
.path_sel_proto = IEEE80211_PATH_PROTOCOL_HWMP,
.path_metric = IEEE80211_PATH_METRIC_AIRTIME,
@@ -75,7 +78,7 @@ const struct mesh_setup default_mesh_setup = {
int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev,
const struct mesh_setup *setup,
struct mesh_setup *setup,
const struct mesh_config *conf)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
@@ -101,6 +104,51 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
if (!rdev->ops->join_mesh)
return -EOPNOTSUPP;
if (!setup->channel) {
/* if no channel explicitly given, use preset channel */
setup->channel = wdev->preset_chan;
setup->channel_type = wdev->preset_chantype;
}
if (!setup->channel) {
/* if we don't have that either, use the first usable channel */
enum ieee80211_band band;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
struct ieee80211_supported_band *sband;
struct ieee80211_channel *chan;
int i;
sband = rdev->wiphy.bands[band];
if (!sband)
continue;
for (i = 0; i < sband->n_channels; i++) {
chan = &sband->channels[i];
if (chan->flags & (IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_PASSIVE_SCAN |
IEEE80211_CHAN_DISABLED |
IEEE80211_CHAN_RADAR))
continue;
setup->channel = chan;
break;
}
if (setup->channel)
break;
}
/* no usable channel ... */
if (!setup->channel)
return -EINVAL;
setup->channel_type = NL80211_CHAN_NO_HT;
}
if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, setup->channel,
setup->channel_type))
return -EINVAL;
err = rdev->ops->join_mesh(&rdev->wiphy, dev, conf, setup);
if (!err) {
memcpy(wdev->ssid, setup->mesh_id, setup->mesh_id_len);
@@ -112,7 +160,7 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
struct net_device *dev,
const struct mesh_setup *setup,
struct mesh_setup *setup,
const struct mesh_config *conf)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
@@ -125,6 +173,45 @@ int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
return err;
}
int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev, int freq,
enum nl80211_channel_type channel_type)
{
struct ieee80211_channel *channel;
/*
* Workaround for libertas (only!), it puts the interface
* into mesh mode but doesn't implement join_mesh. Instead,
* it is configured via sysfs and then joins the mesh when
* you set the channel. Note that the libertas mesh isn't
* compatible with 802.11 mesh.
*/
if (!rdev->ops->join_mesh) {
int err;
if (!netif_running(wdev->netdev))
return -ENETDOWN;
wdev_lock(wdev);
err = cfg80211_set_freq(rdev, wdev, freq, channel_type);
wdev_unlock(wdev);
return err;
}
if (wdev->mesh_id_len)
return -EBUSY;
channel = rdev_freq_to_chan(rdev, freq, channel_type);
if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
channel,
channel_type)) {
return -EINVAL;
}
wdev->preset_chan = channel;
wdev->preset_chantype = channel_type;
return 0;
}
void cfg80211_notify_new_peer_candidate(struct net_device *dev,
const u8 *macaddr, const u8* ie, u8 ie_len, gfp_t gfp)
{