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143 lines
3.7 KiB
143 lines
3.7 KiB
From: Henning Rogge <hrogge@gmail.com>
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Date: Wed, 3 Feb 2016 13:58:38 +0100
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Subject: [PATCH] mac80211: Unify mesh and mpp path removal function
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mpp_path_del() and mesh_path_del() are mostly the same function.
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Move common code into a new static function.
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Acked-by: Bob Copeland <me@bobcopeland.com>
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Signed-off-by: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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--- a/net/mac80211/mesh_pathtbl.c
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+++ b/net/mac80211/mesh_pathtbl.c
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@@ -55,16 +55,21 @@ int mpp_paths_generation;
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static DEFINE_RWLOCK(pathtbl_resize_lock);
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+static inline struct mesh_table *resize_dereference_paths(
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+ struct mesh_table __rcu *table)
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+{
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+ return rcu_dereference_protected(table,
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+ lockdep_is_held(&pathtbl_resize_lock));
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+}
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+
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static inline struct mesh_table *resize_dereference_mesh_paths(void)
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{
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- return rcu_dereference_protected(mesh_paths,
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- lockdep_is_held(&pathtbl_resize_lock));
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+ return resize_dereference_paths(mesh_paths);
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}
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static inline struct mesh_table *resize_dereference_mpp_paths(void)
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{
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- return rcu_dereference_protected(mpp_paths,
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- lockdep_is_held(&pathtbl_resize_lock));
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+ return resize_dereference_paths(mpp_paths);
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}
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/*
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@@ -899,14 +904,17 @@ void mesh_path_flush_by_iface(struct iee
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}
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/**
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- * mesh_path_del - delete a mesh path from the table
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+ * table_path_del - delete a path from the mesh or mpp table
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*
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- * @addr: dst address (ETH_ALEN length)
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+ * @tbl: mesh or mpp path table
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* @sdata: local subif
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+ * @addr: dst address (ETH_ALEN length)
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*
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* Returns: 0 if successful
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*/
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-int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
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+static int table_path_del(struct mesh_table __rcu *rcu_tbl,
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+ struct ieee80211_sub_if_data *sdata,
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+ const u8 *addr)
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{
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struct mesh_table *tbl;
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struct mesh_path *mpath;
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@@ -915,11 +923,7 @@ int mesh_path_del(struct ieee80211_sub_i
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int hash_idx;
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int err = 0;
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- /* flush relevant mpp entries first */
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- mpp_flush_by_proxy(sdata, addr);
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-
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- read_lock_bh(&pathtbl_resize_lock);
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- tbl = resize_dereference_mesh_paths();
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+ tbl = resize_dereference_paths(rcu_tbl);
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hash_idx = mesh_table_hash(addr, sdata, tbl);
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bucket = &tbl->hash_buckets[hash_idx];
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@@ -935,9 +939,30 @@ int mesh_path_del(struct ieee80211_sub_i
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err = -ENXIO;
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enddel:
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- mesh_paths_generation++;
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spin_unlock(&tbl->hashwlock[hash_idx]);
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+ return err;
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+}
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+
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+/**
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+ * mesh_path_del - delete a mesh path from the table
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+ *
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+ * @addr: dst address (ETH_ALEN length)
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+ * @sdata: local subif
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+ *
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+ * Returns: 0 if successful
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+ */
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+int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
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+{
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+ int err = 0;
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+
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+ /* flush relevant mpp entries first */
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+ mpp_flush_by_proxy(sdata, addr);
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+
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+ read_lock_bh(&pathtbl_resize_lock);
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+ err = table_path_del(mesh_paths, sdata, addr);
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+ mesh_paths_generation++;
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read_unlock_bh(&pathtbl_resize_lock);
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+
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return err;
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}
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@@ -951,33 +976,13 @@ enddel:
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*/
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static int mpp_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
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{
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- struct mesh_table *tbl;
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- struct mesh_path *mpath;
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- struct mpath_node *node;
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- struct hlist_head *bucket;
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- int hash_idx;
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int err = 0;
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read_lock_bh(&pathtbl_resize_lock);
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- tbl = resize_dereference_mpp_paths();
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- hash_idx = mesh_table_hash(addr, sdata, tbl);
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- bucket = &tbl->hash_buckets[hash_idx];
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-
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- spin_lock(&tbl->hashwlock[hash_idx]);
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- hlist_for_each_entry(node, bucket, list) {
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- mpath = node->mpath;
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- if (mpath->sdata == sdata &&
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- ether_addr_equal(addr, mpath->dst)) {
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- __mesh_path_del(tbl, node);
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- goto enddel;
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- }
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- }
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-
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- err = -ENXIO;
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-enddel:
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- mesh_paths_generation++;
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- spin_unlock(&tbl->hashwlock[hash_idx]);
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+ err = table_path_del(mpp_paths, sdata, addr);
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+ mpp_paths_generation++;
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read_unlock_bh(&pathtbl_resize_lock);
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+
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return err;
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}
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