mac80211: add vif debugfs driver callbacks
Add debugfs driver callbacks so drivers can add
debugfs entries for interfaces. Note that they
_must_ remove the entries again as add/remove in
the driver doesn't correspond to add/remove in
debugfs; the former is up/down while the latter
is netdev create/destroy.
Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 7da1121..46e08ba 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2167,6 +2167,18 @@
* MAC address of the device going away.
* Hence, this callback must be implemented. It can sleep.
*
+ * @add_interface_debugfs: Drivers can use this callback to add debugfs files
+ * when a vif is added to mac80211. This callback and
+ * @remove_interface_debugfs should be within a CONFIG_MAC80211_DEBUGFS
+ * conditional. @remove_interface_debugfs must be provided for cleanup.
+ * This callback can sleep.
+ *
+ * @remove_interface_debugfs: Remove the debugfs files which were added using
+ * @add_interface_debugfs. This callback must remove all debugfs entries
+ * that were added because mac80211 only removes interface debugfs when the
+ * interface is destroyed, not when it is removed from the driver.
+ * This callback can sleep.
+ *
* @config: Handler for configuration requests. IEEE 802.11 code calls this
* function to change hardware configuration, e.g., channel.
* This function should never fail but returns a negative error code
@@ -2580,6 +2592,12 @@
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct dentry *dir);
+ void (*add_interface_debugfs)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct dentry *dir);
+ void (*remove_interface_debugfs)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct dentry *dir);
#endif
void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum sta_notify_cmd, struct ieee80211_sta *sta);
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 434b3c4..2b08b99 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -528,6 +528,43 @@
local->ops->sta_remove_debugfs(&local->hw, &sdata->vif,
sta, dir);
}
+
+static inline
+void drv_add_interface_debugfs(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata)
+{
+ might_sleep();
+
+ check_sdata_in_driver(sdata);
+
+ if (!local->ops->add_interface_debugfs)
+ return;
+
+ local->ops->add_interface_debugfs(&local->hw, &sdata->vif,
+ sdata->debugfs.dir);
+}
+
+static inline
+void drv_remove_interface_debugfs(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata)
+{
+ might_sleep();
+
+ check_sdata_in_driver(sdata);
+
+ if (!local->ops->remove_interface_debugfs)
+ return;
+
+ local->ops->remove_interface_debugfs(&local->hw, &sdata->vif,
+ sdata->debugfs.dir);
+}
+#else
+static inline
+void drv_add_interface_debugfs(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata) {}
+static inline
+void drv_remove_interface_debugfs(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata) {}
#endif
static inline __must_check
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 0a36dc6..deb78e8 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -621,6 +621,8 @@
goto err_del_interface;
}
+ drv_add_interface_debugfs(local, sdata);
+
if (sdata->vif.type == NL80211_IFTYPE_AP) {
local->fif_pspoll++;
local->fif_probe_req++;
@@ -882,6 +884,8 @@
*/
ieee80211_free_keys(sdata);
+ drv_remove_interface_debugfs(local, sdata);
+
if (going_down)
drv_remove_interface(local, sdata);
}