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-rw-r--r--net/wireless/chan.c56
-rw-r--r--net/wireless/core.h12
-rw-r--r--net/wireless/ibss.c5
-rw-r--r--net/wireless/nl80211.c171
-rw-r--r--net/wireless/sme.c5
-rw-r--r--net/wireless/wext-compat.c15
-rw-r--r--net/wireless/wext-sme.c2
7 files changed, 163 insertions, 103 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index bf1737fc9a7e..d92d088026bf 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -10,38 +10,6 @@
#include "core.h"
struct ieee80211_channel *
-rdev_fixed_channel(struct cfg80211_registered_device *rdev,
- struct wireless_dev *for_wdev)
-{
- struct wireless_dev *wdev;
- struct ieee80211_channel *result = NULL;
-
- WARN_ON(!mutex_is_locked(&rdev->devlist_mtx));
-
- list_for_each_entry(wdev, &rdev->netdev_list, list) {
- if (wdev == for_wdev)
- continue;
-
- /*
- * Lock manually to tell lockdep about allowed
- * nesting here if for_wdev->mtx is held already.
- * This is ok as it's all under the rdev devlist
- * mutex and as such can only be done once at any
- * given time.
- */
- mutex_lock_nested(&wdev->mtx, SINGLE_DEPTH_NESTING);
- if (wdev->current_bss)
- result = wdev->current_bss->pub.channel;
- wdev_unlock(wdev);
-
- if (result)
- break;
- }
-
- return result;
-}
-
-struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type channel_type)
{
@@ -75,15 +43,22 @@ rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
return chan;
}
-int rdev_set_freq(struct cfg80211_registered_device *rdev,
- struct wireless_dev *for_wdev,
- int freq, enum nl80211_channel_type channel_type)
+int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev, int freq,
+ enum nl80211_channel_type channel_type)
{
struct ieee80211_channel *chan;
int result;
- if (rdev_fixed_channel(rdev, for_wdev))
- return -EBUSY;
+ if (wdev->iftype == NL80211_IFTYPE_MONITOR)
+ wdev = NULL;
+
+ if (wdev) {
+ ASSERT_WDEV_LOCK(wdev);
+
+ if (!netif_running(wdev->netdev))
+ return -ENETDOWN;
+ }
if (!rdev->ops->set_channel)
return -EOPNOTSUPP;
@@ -92,11 +67,14 @@ int rdev_set_freq(struct cfg80211_registered_device *rdev,
if (!chan)
return -EINVAL;
- result = rdev->ops->set_channel(&rdev->wiphy, chan, channel_type);
+ result = rdev->ops->set_channel(&rdev->wiphy,
+ wdev ? wdev->netdev : NULL,
+ chan, channel_type);
if (result)
return result;
- rdev->channel = chan;
+ if (wdev)
+ wdev->channel = chan;
return 0;
}
diff --git a/net/wireless/core.h b/net/wireless/core.h
index b2234b436ead..ae930acf75e9 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -70,9 +70,6 @@ struct cfg80211_registered_device {
struct work_struct conn_work;
struct work_struct event_work;
- /* current channel */
- struct ieee80211_channel *channel;
-
/* must be last because of the way we do wiphy_priv(),
* and it should at least be aligned to NETDEV_ALIGN */
struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
@@ -388,14 +385,11 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
struct ieee80211_channel *
-rdev_fixed_channel(struct cfg80211_registered_device *rdev,
- struct wireless_dev *for_wdev);
-struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type channel_type);
-int rdev_set_freq(struct cfg80211_registered_device *rdev,
- struct wireless_dev *for_wdev,
- int freq, enum nl80211_channel_type channel_type);
+int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev, int freq,
+ enum nl80211_channel_type channel_type);
u16 cfg80211_calculate_bitrate(struct rate_info *rate);
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 6ef5a491fb4b..9825317e653a 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -80,15 +80,10 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
struct cfg80211_cached_keys *connkeys)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
- struct ieee80211_channel *chan;
int err;
ASSERT_WDEV_LOCK(wdev);
- chan = rdev_fixed_channel(rdev, wdev);
- if (chan && chan != params->channel)
- return -EBUSY;
-
if (wdev->ssid_len)
return -EALREADY;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c27bef8e0c11..ec1b4a896c6e 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -588,6 +588,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
}
+ CMD(set_channel, SET_CHANNEL);
#undef CMD
@@ -688,10 +689,90 @@ static int parse_txq_params(struct nlattr *tb[],
return 0;
}
+static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
+{
+ /*
+ * You can only set the channel explicitly for AP, mesh
+ * and WDS type interfaces; all others have their channel
+ * managed via their respective "establish a connection"
+ * command (connect, join, ...)
+ *
+ * Monitors are special as they are normally slaved to
+ * whatever else is going on, so they behave as though
+ * you tried setting the wiphy channel itself.
+ */
+ return !wdev ||
+ wdev->iftype == NL80211_IFTYPE_AP ||
+ wdev->iftype == NL80211_IFTYPE_WDS ||
+ wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
+ wdev->iftype == NL80211_IFTYPE_MONITOR;
+}
+
+static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ struct genl_info *info)
+{
+ enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
+ u32 freq;
+ int result;
+
+ if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
+ return -EINVAL;
+
+ if (!nl80211_can_set_dev_channel(wdev))
+ return -EOPNOTSUPP;
+
+ if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
+ channel_type = nla_get_u32(info->attrs[
+ NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+ if (channel_type != NL80211_CHAN_NO_HT &&
+ channel_type != NL80211_CHAN_HT20 &&
+ channel_type != NL80211_CHAN_HT40PLUS &&
+ channel_type != NL80211_CHAN_HT40MINUS)
+ return -EINVAL;
+ }
+
+ freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+
+ mutex_lock(&rdev->devlist_mtx);
+ if (wdev) {
+ wdev_lock(wdev);
+ result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
+ wdev_unlock(wdev);
+ } else {
+ result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
+ }
+ mutex_unlock(&rdev->devlist_mtx);
+
+ return result;
+}
+
+static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *netdev;
+ int result;
+
+ rtnl_lock();
+
+ result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
+ if (result)
+ goto unlock;
+
+ result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
+
+ unlock:
+ rtnl_unlock();
+
+ return result;
+}
+
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
- int result = 0, rem_txq_params = 0;
+ struct net_device *netdev = NULL;
+ struct wireless_dev *wdev;
+ int result, rem_txq_params = 0;
struct nlattr *nl_txq_params;
u32 changed;
u8 retry_short = 0, retry_long = 0;
@@ -700,16 +781,50 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
rtnl_lock();
+ /*
+ * Try to find the wiphy and netdev. Normally this
+ * function shouldn't need the netdev, but this is
+ * done for backward compatibility -- previously
+ * setting the channel was done per wiphy, but now
+ * it is per netdev. Previous userland like hostapd
+ * also passed a netdev to set_wiphy, so that it is
+ * possible to let that go to the right netdev!
+ */
mutex_lock(&cfg80211_mutex);
- rdev = __cfg80211_rdev_from_info(info);
- if (IS_ERR(rdev)) {
- mutex_unlock(&cfg80211_mutex);
- result = PTR_ERR(rdev);
- goto unlock;
+ if (info->attrs[NL80211_ATTR_IFINDEX]) {
+ int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
+
+ netdev = dev_get_by_index(genl_info_net(info), ifindex);
+ if (netdev && netdev->ieee80211_ptr) {
+ rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
+ mutex_lock(&rdev->mtx);
+ } else
+ netdev = NULL;
}
- mutex_lock(&rdev->mtx);
+ if (!netdev) {
+ rdev = __cfg80211_rdev_from_info(info);
+ if (IS_ERR(rdev)) {
+ mutex_unlock(&cfg80211_mutex);
+ result = PTR_ERR(rdev);
+ goto unlock;
+ }
+ wdev = NULL;
+ netdev = NULL;
+ result = 0;
+
+ mutex_lock(&rdev->mtx);
+ } else if (netif_running(netdev) &&
+ nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
+ wdev = netdev->ieee80211_ptr;
+ else
+ wdev = NULL;
+
+ /*
+ * end workaround code, by now the rdev is available
+ * and locked, and wdev may or may not be NULL.
+ */
if (info->attrs[NL80211_ATTR_WIPHY_NAME])
result = cfg80211_dev_rename(
@@ -748,26 +863,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
- enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
- u32 freq;
-
- result = -EINVAL;
-
- if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
- channel_type = nla_get_u32(info->attrs[
- NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
- if (channel_type != NL80211_CHAN_NO_HT &&
- channel_type != NL80211_CHAN_HT20 &&
- channel_type != NL80211_CHAN_HT40PLUS &&
- channel_type != NL80211_CHAN_HT40MINUS)
- goto bad_res;
- }
-
- freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
-
- mutex_lock(&rdev->devlist_mtx);
- result = rdev_set_freq(rdev, NULL, freq, channel_type);
- mutex_unlock(&rdev->devlist_mtx);
+ result = __nl80211_set_channel(rdev, wdev, info);
if (result)
goto bad_res;
}
@@ -864,6 +960,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
bad_res:
mutex_unlock(&rdev->mtx);
+ if (netdev)
+ dev_put(netdev);
unlock:
rtnl_unlock();
return result;
@@ -3561,9 +3659,8 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
struct net_device *dev;
- struct wireless_dev *wdev;
struct cfg80211_crypto_settings crypto;
- struct ieee80211_channel *chan, *fixedchan;
+ struct ieee80211_channel *chan;
const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
int err, ssid_len, ie_len = 0;
bool use_mfp = false;
@@ -3606,16 +3703,6 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- mutex_lock(&rdev->devlist_mtx);
- wdev = dev->ieee80211_ptr;
- fixedchan = rdev_fixed_channel(rdev, wdev);
- if (fixedchan && chan != fixedchan) {
- err = -EBUSY;
- mutex_unlock(&rdev->devlist_mtx);
- goto out;
- }
- mutex_unlock(&rdev->devlist_mtx);
-
ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
@@ -5185,6 +5272,12 @@ static struct genl_ops nl80211_ops[] = {
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = NL80211_CMD_SET_CHANNEL,
+ .doit = nl80211_set_channel,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
};
static struct genl_multicast_group nl80211_mlme_mcgrp = {
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index dcd7685242f7..14cf8163912a 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -740,7 +740,6 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
const u8 *prev_bssid)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
- struct ieee80211_channel *chan;
struct cfg80211_bss *bss = NULL;
int err;
@@ -749,10 +748,6 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
if (wdev->sme_state != CFG80211_SME_IDLE)
return -EALREADY;
- chan = rdev_fixed_channel(rdev, wdev);
- if (chan && chan != connect->channel)
- return -EBUSY;
-
if (WARN_ON(wdev->connect_keys)) {
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 9ab51838849e..75848c6cb22a 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -781,16 +781,22 @@ int cfg80211_wext_siwfreq(struct net_device *dev,
return cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);
case NL80211_IFTYPE_ADHOC:
return cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);
- default:
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_WDS:
+ case NL80211_IFTYPE_MESH_POINT:
freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
if (freq < 0)
return freq;
if (freq == 0)
return -EINVAL;
+ wdev_lock(wdev);
mutex_lock(&rdev->devlist_mtx);
- err = rdev_set_freq(rdev, NULL, freq, NL80211_CHAN_NO_HT);
+ err = cfg80211_set_freq(rdev, wdev, freq, NL80211_CHAN_NO_HT);
mutex_unlock(&rdev->devlist_mtx);
+ wdev_unlock(wdev);
return err;
+ default:
+ return -EOPNOTSUPP;
}
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwfreq);
@@ -800,7 +806,6 @@ int cfg80211_wext_giwfreq(struct net_device *dev,
struct iw_freq *freq, char *extra)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
- struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
@@ -808,9 +813,9 @@ int cfg80211_wext_giwfreq(struct net_device *dev,
case NL80211_IFTYPE_ADHOC:
return cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
default:
- if (!rdev->channel)
+ if (!wdev->channel)
return -EINVAL;
- freq->m = rdev->channel->center_freq;
+ freq->m = wdev->channel->center_freq;
freq->e = 6;
return 0;
}
diff --git a/net/wireless/wext-sme.c b/net/wireless/wext-sme.c
index 5615a8802536..8e5ab4f4e9c4 100644
--- a/net/wireless/wext-sme.c
+++ b/net/wireless/wext-sme.c
@@ -107,7 +107,7 @@ int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
/* SSID is not set, we just want to switch channel */
if (chan && !wdev->wext.connect.ssid_len) {
- err = rdev_set_freq(rdev, wdev, freq, NL80211_CHAN_NO_HT);
+ err = cfg80211_set_freq(rdev, wdev, freq, NL80211_CHAN_NO_HT);
goto out;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 19:32:04 +0000