In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. This requires adding a pointer back
to the sta_info since container_of() can't resolve the sta_info.
Cc: Johannes Berg <johan...@sipsolutions.net>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: net...@vger.kernel.org
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
net/mac80211/mesh_plink.c | 9 +++++----
net/mac80211/sta_info.c | 2 +-
net/mac80211/sta_info.h | 2 ++
3 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index f69c6c38ca43..fcc02beaee6d 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -604,8 +604,9 @@ void mesh_neighbour_update(struct ieee80211_sub_if_data
*sdata,
ieee80211_mbss_info_change_notify(sdata, changed);
}
-static void mesh_plink_timer(unsigned long data)
+static void mesh_plink_timer(struct timer_list *t)
{
+ struct mesh_sta *mesh = from_timer(mesh, t, plink_timer);
struct sta_info *sta;
u16 reason = 0;
struct ieee80211_sub_if_data *sdata;
@@ -617,7 +618,7 @@ static void mesh_plink_timer(unsigned long data)
* del_timer_sync() this timer after having made sure
* it cannot be readded (by deleting the plink.)
*/
- sta = (struct sta_info *) data;
+ sta = mesh->plink_sta;
if (sta->sdata->local->quiescing)
return;
@@ -698,8 +699,8 @@ static void mesh_plink_timer(unsigned long data)
static inline void mesh_plink_timer_set(struct sta_info *sta, u32 timeout)
{
sta->mesh->plink_timer.expires = jiffies + msecs_to_jiffies(timeout);
- sta->mesh->plink_timer.data = (unsigned long) sta;
- sta->mesh->plink_timer.function = mesh_plink_timer;
+ sta->mesh->plink_sta = sta;
+ sta->mesh->plink_timer.function = (TIMER_FUNC_TYPE)mesh_plink_timer;
sta->mesh->plink_timeout = timeout;
add_timer(&sta->mesh->plink_timer);
}
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 69615016d5bf..5e5de9455e4e 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -332,7 +332,7 @@ struct sta_info *sta_info_alloc(struct
ieee80211_sub_if_data *sdata,
spin_lock_init(&sta->mesh->plink_lock);
if (ieee80211_vif_is_mesh(&sdata->vif) &&
!sdata->u.mesh.user_mpm)
- init_timer(&sta->mesh->plink_timer);
+ timer_setup(&sta->mesh->plink_timer, NULL, 0);
sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
}
#endif
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 3acbdfa9f649..21d9760ce5c3 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -344,6 +344,7 @@ DECLARE_EWMA(mesh_fail_avg, 20, 8)
* @plink_state: peer link state
* @plink_timeout: timeout of peer link
* @plink_timer: peer link watch timer
+ * @plink_sta: peer link watch timer's sta_info
* @t_offset: timing offset relative to this host
* @t_offset_setpoint: reference timing offset of this sta to be used when
* calculating clockdrift
@@ -356,6 +357,7 @@ DECLARE_EWMA(mesh_fail_avg, 20, 8)
*/
struct mesh_sta {
struct timer_list plink_timer;
+ struct sta_info *plink_sta;
s64 t_offset;
s64 t_offset_setpoint;
--
2.7.4
--
Kees Cook
Pixel Security
