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mac80211: Unify mesh and mpp path removal function 

mpp_path_del() and mesh_path_del() are mostly the same function.
Move common code into a new static function.

Acked-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
steinar/wifi_calib_4_9_kernel
Henning Rogge 2016-02-03 13:58:38 +01:00 committed by Johannes Berg
parent ab1c7906b0
commit 4cc955de7c
1 changed files with 41 additions and 36 deletions
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77
net/mac80211/mesh_pathtbl.c
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@ -55,16 +55,21 @@ int mpp_paths_generation;
static DEFINE_RWLOCK(pathtbl_resize_lock);
static inline struct mesh_table *resize_dereference_paths(
struct mesh_table __rcu *table)
{
return rcu_dereference_protected(table,
lockdep_is_held(&pathtbl_resize_lock));
}
static inline struct mesh_table *resize_dereference_mesh_paths(void)
{
return rcu_dereference_protected(mesh_paths,
lockdep_is_held(&pathtbl_resize_lock));
return resize_dereference_paths(mesh_paths);
}
static inline struct mesh_table *resize_dereference_mpp_paths(void)
{
return rcu_dereference_protected(mpp_paths,
lockdep_is_held(&pathtbl_resize_lock));
return resize_dereference_paths(mpp_paths);
}
/*
@ -898,14 +903,17 @@ void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
}
/**
* mesh_path_del - delete a mesh path from the table
* table_path_del - delete a path from the mesh or mpp table
*
* @addr: dst address (ETH_ALEN length)
* @tbl: mesh or mpp path table
* @sdata: local subif
* @addr: dst address (ETH_ALEN length)
*
* Returns: 0 if successful
*/
int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
static int table_path_del(struct mesh_table __rcu *rcu_tbl,
struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct mesh_table *tbl;
struct mesh_path *mpath;
@ -914,11 +922,7 @@ int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
int hash_idx;
int err = 0;
/* flush relevant mpp entries first */
mpp_flush_by_proxy(sdata, addr);
read_lock_bh(&pathtbl_resize_lock);
tbl = resize_dereference_mesh_paths();
tbl = resize_dereference_paths(rcu_tbl);
hash_idx = mesh_table_hash(addr, sdata, tbl);
bucket = &tbl->hash_buckets[hash_idx];
@ -934,9 +938,30 @@ int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
err = -ENXIO;
enddel:
mesh_paths_generation++;
spin_unlock(&tbl->hashwlock[hash_idx]);
return err;
}
/**
* mesh_path_del - delete a mesh path from the table
*
* @addr: dst address (ETH_ALEN length)
* @sdata: local subif
*
* Returns: 0 if successful
*/
int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
{
int err = 0;
/* flush relevant mpp entries first */
mpp_flush_by_proxy(sdata, addr);
read_lock_bh(&pathtbl_resize_lock);
err = table_path_del(mesh_paths, sdata, addr);
mesh_paths_generation++;
read_unlock_bh(&pathtbl_resize_lock);
return err;
}
@ -950,33 +975,13 @@ enddel:
*/
static int mpp_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
{
struct mesh_table *tbl;
struct mesh_path *mpath;
struct mpath_node *node;
struct hlist_head *bucket;
int hash_idx;
int err = 0;
read_lock_bh(&pathtbl_resize_lock);
tbl = resize_dereference_mpp_paths();
hash_idx = mesh_table_hash(addr, sdata, tbl);
bucket = &tbl->hash_buckets[hash_idx];
spin_lock(&tbl->hashwlock[hash_idx]);
hlist_for_each_entry(node, bucket, list) {
mpath = node->mpath;
if (mpath->sdata == sdata &&
ether_addr_equal(addr, mpath->dst)) {
__mesh_path_del(tbl, node);
goto enddel;
}
}
err = -ENXIO;
enddel:
mesh_paths_generation++;
spin_unlock(&tbl->hashwlock[hash_idx]);
err = table_path_del(mpp_paths, sdata, addr);
mpp_paths_generation++;
read_unlock_bh(&pathtbl_resize_lock);
return err;
}