mac80211: move sdata debugfs dir to vif

There is need create driver own per interface debugfs files. This is
currently done by drv_{add,remove}_interface_debugfs() callbacks. But it
is possible that after we remove interface from the driver (i.e.
on suspend) we call drv_remove_interface_debugfs() function. Fixing this
problem will require to add call drv_{add,remove}_interface_debugfs()
anytime we create and remove interface in mac80211. So it's better to
add debugfs dir dentry to vif structure to allow to create/remove
custom debugfs driver files on drv_{add,remove}_interface().

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index f5db5e9..8b2c750 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1067,6 +1067,9 @@ enum ieee80211_vif_flags {
  *     path needing to access it; even though the netdev carrier will always
  *     be off when it is %NULL there can still be races and packets could be
  *     processed after it switches back to %NULL.
+ * @debugfs_dir: debugfs dentry, can be used by drivers to create own per
+ *      interface debug files. Note that it will be NULL for the virtual
+ *     monitor interface (if that is requested.)
  * @drv_priv: data area for driver use, will always be aligned to
  *     sizeof(void *).
  */
@@ -1083,6 +1086,10 @@ struct ieee80211_vif {
 
        u32 driver_flags;
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+       struct dentry *debugfs_dir;
+#endif
+
        /* must be last */
        u8 drv_priv[0] __aligned(sizeof(void *));
 };

diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index c3a3082..1521cab 100644 (file)
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -295,7 +295,7 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
        char buf[50];
        struct ieee80211_key *key;
 
-       if (!sdata->debugfs.dir)
+       if (!sdata->vif.debugfs_dir)
                return;
 
        lockdep_assert_held(&sdata->local->key_mtx);
@@ -311,7 +311,7 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
                sprintf(buf, "../keys/%d", key->debugfs.cnt);
                sdata->debugfs.default_unicast_key =
                        debugfs_create_symlink("default_unicast_key",
-                                              sdata->debugfs.dir, buf);
+                                              sdata->vif.debugfs_dir, buf);
        }
 
        if (sdata->debugfs.default_multicast_key) {
@@ -325,7 +325,7 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
                sprintf(buf, "../keys/%d", key->debugfs.cnt);
                sdata->debugfs.default_multicast_key =
                        debugfs_create_symlink("default_multicast_key",
-                                              sdata->debugfs.dir, buf);
+                                              sdata->vif.debugfs_dir, buf);
        }
 }
 
@@ -334,7 +334,7 @@ void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
        char buf[50];
        struct ieee80211_key *key;
 
-       if (!sdata->debugfs.dir)
+       if (!sdata->vif.debugfs_dir)
                return;
 
        key = key_mtx_dereference(sdata->local,
@@ -343,7 +343,7 @@ void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
                sprintf(buf, "../keys/%d", key->debugfs.cnt);
                sdata->debugfs.default_mgmt_key =
                        debugfs_create_symlink("default_mgmt_key",
-                                              sdata->debugfs.dir, buf);
+                                              sdata->vif.debugfs_dir, buf);
        } else
                ieee80211_debugfs_key_remove_mgmt_default(sdata);
 }

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 059bbb8..ddb4268 100644 (file)
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -521,7 +521,7 @@ IEEE80211_IF_FILE(dot11MeshAwakeWindowDuration,
 #endif
 
 #define DEBUGFS_ADD_MODE(name, mode) \
-       debugfs_create_file(#name, mode, sdata->debugfs.dir, \
+       debugfs_create_file(#name, mode, sdata->vif.debugfs_dir, \
                            sdata, &name##_ops);
 
 #define DEBUGFS_ADD(name) DEBUGFS_ADD_MODE(name, 0400)
@@ -577,7 +577,7 @@ static void add_mesh_files(struct ieee80211_sub_if_data *sdata)
 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 {
        struct dentry *dir = debugfs_create_dir("mesh_stats",
-                                               sdata->debugfs.dir);
+                                               sdata->vif.debugfs_dir);
 #define MESHSTATS_ADD(name)\
        debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
 
@@ -594,7 +594,7 @@ static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 {
        struct dentry *dir = debugfs_create_dir("mesh_config",
-                                               sdata->debugfs.dir);
+                                               sdata->vif.debugfs_dir);
 
 #define MESHPARAMS_ADD(name) \
        debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
@@ -631,7 +631,7 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
 
 static void add_files(struct ieee80211_sub_if_data *sdata)
 {
-       if (!sdata->debugfs.dir)
+       if (!sdata->vif.debugfs_dir)
                return;
 
        DEBUGFS_ADD(flags);
@@ -673,21 +673,21 @@ void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
        char buf[10+IFNAMSIZ];
 
        sprintf(buf, "netdev:%s", sdata->name);
-       sdata->debugfs.dir = debugfs_create_dir(buf,
+       sdata->vif.debugfs_dir = debugfs_create_dir(buf,
                sdata->local->hw.wiphy->debugfsdir);
-       if (sdata->debugfs.dir)
+       if (sdata->vif.debugfs_dir)
                sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
-                       sdata->debugfs.dir);
+                       sdata->vif.debugfs_dir);
        add_files(sdata);
 }
 
 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
 {
-       if (!sdata->debugfs.dir)
+       if (!sdata->vif.debugfs_dir)
                return;
 
-       debugfs_remove_recursive(sdata->debugfs.dir);
-       sdata->debugfs.dir = NULL;
+       debugfs_remove_recursive(sdata->vif.debugfs_dir);
+       sdata->vif.debugfs_dir = NULL;
 }
 
 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
@@ -695,7 +695,7 @@ void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
        struct dentry *dir;
        char buf[10 + IFNAMSIZ];
 
-       dir = sdata->debugfs.dir;
+       dir = sdata->vif.debugfs_dir;
 
        if (!dir)
                return;

diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 025b759..0059f38 100644 (file)
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -560,7 +560,7 @@ void drv_add_interface_debugfs(struct ieee80211_local *local,
                return;
 
        local->ops->add_interface_debugfs(&local->hw, &sdata->vif,
-                                         sdata->debugfs.dir);
+                                         sdata->vif.debugfs_dir);
 }
 
 static inline
@@ -575,7 +575,7 @@ void drv_remove_interface_debugfs(struct ieee80211_local *local,
                return;
 
        local->ops->remove_interface_debugfs(&local->hw, &sdata->vif,
-                                            sdata->debugfs.dir);
+                                            sdata->vif.debugfs_dir);
 }
 #else
 static inline

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 95beb18..d6e9206 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -758,7 +758,6 @@ struct ieee80211_sub_if_data {
 
 #ifdef CONFIG_MAC80211_DEBUGFS
        struct {
-               struct dentry *dir;
                struct dentry *subdir_stations;
                struct dentry *default_unicast_key;
                struct dentry *default_multicast_key;