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mac80211: allow iterating inactive interfaces

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Sometimes the driver might want to modify private data in interfaces
that are down. One possible use-case is cleaning up interface state
after HW recovery. Some interfaces that were up before the recovery took
place might be down now, but they might still be "dirty".

Introduce a new iterate_interfaces() API and a new ACTIVE iterator flag.
This way the internal implementation of the both active and inactive
APIs remains the same.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov
2015-03-01 09:10:15 +02:00
committed by Johannes Berg
parent 98fc43864a
commit 3384d757d4
2 changed files with 46 additions and 18 deletions
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35
include/net/mac80211.h
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@@ -4346,12 +4346,32 @@ void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw);
* haven't been re-added to the driver yet.
* @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all
* interfaces, even if they haven't been re-added to the driver yet.
* @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up).
*/
enum ieee80211_interface_iteration_flags {
IEEE80211_IFACE_ITER_NORMAL = 0,
IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0),
IEEE80211_IFACE_ITER_ACTIVE = BIT(1),
};
/**
* ieee80211_iterate_interfaces - iterate interfaces
*
* This function iterates over the interfaces associated with a given
* hardware and calls the callback for them. This includes active as well as
* inactive interfaces. This function allows the iterator function to sleep.
* Will iterate over a new interface during add_interface().
*
* @hw: the hardware struct of which the interfaces should be iterated over
* @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags
* @iterator: the iterator function to call
* @data: first argument of the iterator function
*/
void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data);
/**
* ieee80211_iterate_active_interfaces - iterate active interfaces
*
@@ -4367,11 +4387,16 @@ enum ieee80211_interface_iteration_flags {
* @iterator: the iterator function to call
* @data: first argument of the iterator function
*/
void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
u32 iter_flags,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data);
static inline void
ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data)
{
ieee80211_iterate_interfaces(hw,
iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
iterator, data);
}
/**
* ieee80211_iterate_active_interfaces_atomic - iterate active interfaces