From: Javier Cardona <javier@xxxxxxxxxxx>
Signed-off-by: Javier Cardona <javier@xxxxxxxxxxx>
---
net/mac80211/mesh_pathtbl.c | 65 +++++++++++++++++-------------------------
1 files changed, 26 insertions(+), 39 deletions(-)
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index e941de2..9d9e1ac 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -790,35 +790,6 @@ void mesh_plink_broken(struct sta_info *sta)
rcu_read_unlock();
}
-/**
- * mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
- *
- * @sta - mesh peer to match
- *
- * RCU notes: this function is called when a mesh plink transitions from
- * PLINK_ESTAB to any other state, since PLINK_ESTAB state is the only one that
- * allows path creation. This will happen before the sta can be freed (because
- * sta_info_destroy() calls this) so any reader in a rcu read block will be
- * protected against the plink disappearing.
- */
-void mesh_path_flush_by_nexthop(struct sta_info *sta)
-{
- struct mesh_table *tbl;
- struct mesh_path *mpath;
- struct mpath_node *node;
- struct hlist_node *p;
- int i;
-
- rcu_read_lock();
- tbl = rcu_dereference(mesh_paths);
- for_each_mesh_entry(tbl, p, node, i) {
- mpath = node->mpath;
- if (rcu_dereference(mpath->next_hop) == sta)
- mesh_path_del(mpath->dst, mpath->sdata);
- }
- rcu_read_unlock();
-}
-
static void mesh_path_node_reclaim(struct rcu_head *rp)
{
struct mpath_node *node = container_of(rp, struct mpath_node, rcu);
@@ -845,7 +816,18 @@ static void __mesh_path_del(struct mesh_table *tbl, struct mpath_node *node)
atomic_dec(&tbl->entries);
}
-static void mesh_path_flush(struct ieee80211_sub_if_data *sdata)
+/**
+ * mesh_path_flush_by_nexthop - Deletes mesh paths if their next hop matches
+ *
+ * @sta - mesh peer to match
+ *
+ * RCU notes: this function is called when a mesh plink transitions from
+ * PLINK_ESTAB to any other state, since PLINK_ESTAB state is the only one that
+ * allows path creation. This will happen before the sta can be freed (because
+ * sta_info_destroy() calls this) so any reader in a rcu read block will be
+ * protected against the plink disappearing.
+ */
+void mesh_path_flush_by_nexthop(struct sta_info *sta)
{
struct mesh_table *tbl;
struct mesh_path *mpath;
@@ -857,7 +839,7 @@ static void mesh_path_flush(struct ieee80211_sub_if_data *sdata)
tbl = rcu_dereference(mesh_paths);
for_each_mesh_entry(tbl, p, node, i) {
mpath = node->mpath;
- if (mpath->sdata == sdata) {
+ if (rcu_dereference(mpath->next_hop) == sta) {
spin_lock_bh(&tbl->hashwlock[i]);
__mesh_path_del(tbl, node);
spin_unlock_bh(&tbl->hashwlock[i]);
@@ -866,24 +848,23 @@ static void mesh_path_flush(struct ieee80211_sub_if_data *sdata)
rcu_read_unlock();
}
-static void mpp_path_flush(struct ieee80211_sub_if_data *sdata)
+/* Needs to be called with the rcu read lock taken */
+static void table_flush_by_iface(struct mesh_table *tbl,
+ struct ieee80211_sub_if_data *sdata)
{
- struct mesh_table *tbl;
struct mesh_path *mpath;
struct mpath_node *node;
struct hlist_node *p;
int i;
- read_lock_bh(&pathtbl_resize_lock);
- tbl = rcu_dereference_protected(mpp_paths,
- lockdep_is_held(pathtbl_resize_lock));
for_each_mesh_entry(tbl, p, node, i) {
mpath = node->mpath;
+ if (mpath->sdata != sdata)
+ continue;
spin_lock_bh(&tbl->hashwlock[i]);
__mesh_path_del(tbl, node);
spin_unlock_bh(&tbl->hashwlock[i]);
}
- read_unlock_bh(&pathtbl_resize_lock);
}
/**
@@ -896,8 +877,14 @@ static void mpp_path_flush(struct ieee80211_sub_if_data *sdata)
*/
void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
{
- mesh_path_flush(sdata);
- mpp_path_flush(sdata);
+ struct mesh_table *tbl;
+
+ rcu_read_lock();
+ tbl = rcu_dereference(mesh_paths);
+ table_flush_by_iface(tbl, sdata);
+ tbl = rcu_dereference(mpp_paths);
+ table_flush_by_iface(tbl, sdata);
+ rcu_read_unlock();
}
/**
--
1.7.4.1
--
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