mac80211_hwsim: allow creating/destroying radios on the fly
Add new commands to the hwsim generic netlink family to allow
creating and destroying radios on the fly. The number of channels
a radio supports can be specified when it's created, if it isn't
the module parameter will be used as default.
This should be extended in the future to allow other parameters
to be specified, e.g.
* list of channels
* interface combinations, particularly P2P_DEVICE support
* regtest
* and pretty much all other hardware capabilities
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 5bad3d4..056dae7 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -273,7 +273,7 @@
struct ieee80211_iface_combination if_combination;
struct mac_address addresses[2];
- int channels;
+ int channels, idx;
struct ieee80211_channel *tmp_chan;
struct delayed_work roc_done;
@@ -352,6 +352,8 @@
.len = IEEE80211_TX_MAX_RATES *
sizeof(struct hwsim_tx_rate)},
[HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
+ [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
+ [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
};
static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
@@ -1818,7 +1820,7 @@
static struct ieee80211_ops mac80211_hwsim_mchan_ops;
-static int __init mac80211_hwsim_create_radio(void)
+static int mac80211_hwsim_create_radio(int channels)
{
int err;
u8 addr[ETH_ALEN];
@@ -1873,6 +1875,7 @@
hw->wiphy->addresses = data->addresses;
data->channels = channels;
+ data->idx = idx;
if (data->channels > 1) {
hw->wiphy->max_scan_ssids = 255;
@@ -2023,7 +2026,7 @@
list_add_tail(&data->list, &hwsim_radios);
spin_unlock_bh(&hwsim_radio_lock);
- return 0;
+ return idx;
failed_hw:
device_unregister(data->dev);
@@ -2270,6 +2273,39 @@
return 0;
}
+static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
+{
+ unsigned int chans = channels;
+
+ if (info->attrs[HWSIM_ATTR_CHANNELS])
+ chans = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
+
+ return mac80211_hwsim_create_radio(chans);
+}
+
+static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info)
+{
+ struct mac80211_hwsim_data *data;
+ int idx;
+
+ if (!info->attrs[HWSIM_ATTR_RADIO_ID])
+ return -EINVAL;
+ idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
+
+ spin_lock_bh(&hwsim_radio_lock);
+ list_for_each_entry(data, &hwsim_radios, list) {
+ if (data->idx != idx)
+ continue;
+ list_del(&data->list);
+ spin_unlock_bh(&hwsim_radio_lock);
+ mac80211_hwsim_destroy_radio(data);
+ return 0;
+ }
+ spin_unlock_bh(&hwsim_radio_lock);
+
+ return -ENODEV;
+}
+
/* Generic Netlink operations array */
static const struct genl_ops hwsim_ops[] = {
{
@@ -2288,6 +2324,18 @@
.policy = hwsim_genl_policy,
.doit = hwsim_tx_info_frame_received_nl,
},
+ {
+ .cmd = HWSIM_CMD_CREATE_RADIO,
+ .policy = hwsim_genl_policy,
+ .doit = hwsim_create_radio_nl,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = HWSIM_CMD_DESTROY_RADIO,
+ .policy = hwsim_genl_policy,
+ .doit = hwsim_destroy_radio_nl,
+ .flags = GENL_ADMIN_PERM,
+ },
};
static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
@@ -2345,7 +2393,7 @@
{
int i, err;
- if (radios < 1 || radios > 100)
+ if (radios < 0 || radios > 100)
return -EINVAL;
if (channels < 1)
@@ -2380,8 +2428,8 @@
}
for (i = 0; i < radios; i++) {
- err = mac80211_hwsim_create_radio();
- if (err)
+ err = mac80211_hwsim_create_radio(channels);
+ if (err < 0)
goto out_free_radios;
}