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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>
This commit is contained in:
Alexander Bondar 2012-12-22 10:43:33 +02:00 committed by Johannes Berg
parent 776b358017
commit b207cdb07f
3 changed files with 59 additions and 0 deletions
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18
include/net/mac80211.h
View File

@ -2167,6 +2167,18 @@ enum ieee80211_rate_control_changed {
* 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_ops {
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);

37
net/mac80211/driver-ops.h
View File

@ -528,6 +528,43 @@ static inline void drv_sta_remove_debugfs(struct ieee80211_local *local,
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

4
net/mac80211/iface.c
View File

@ -621,6 +621,8 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
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 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
*/
ieee80211_free_keys(sdata);
drv_remove_interface_debugfs(local, sdata);
if (going_down)
drv_remove_interface(local, sdata);
}