mac80211: Move mpath and mpp growth to mesh workqueue.
This prevents calling rcu_synchronize from within the tx path by moving the
table growth code to the mesh workqueue.
Move mesh_table_free and mesh_table_grow from mesh.c to mesh_pathtbl.c and
declare them static.
Also, re-enable mesh in Kconfig and update the configuration description.
Signed-off-by: Javier Cardona <javier@cozybit.com>
Tested-by: Andrey Yurovsky <andrey@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 25d0065..3185e18 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -47,7 +47,7 @@
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
- ifmsh->housekeeping = true;
+ ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING;
if (local->quiescing) {
set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
@@ -320,30 +320,6 @@
return newtbl;
}
-static void __mesh_table_free(struct mesh_table *tbl)
-{
- kfree(tbl->hash_buckets);
- kfree(tbl->hashwlock);
- kfree(tbl);
-}
-
-void mesh_table_free(struct mesh_table *tbl, bool free_leafs)
-{
- struct hlist_head *mesh_hash;
- struct hlist_node *p, *q;
- int i;
-
- mesh_hash = tbl->hash_buckets;
- for (i = 0; i <= tbl->hash_mask; i++) {
- spin_lock(&tbl->hashwlock[i]);
- hlist_for_each_safe(p, q, &mesh_hash[i]) {
- tbl->free_node(p, free_leafs);
- atomic_dec(&tbl->entries);
- }
- spin_unlock(&tbl->hashwlock[i]);
- }
- __mesh_table_free(tbl);
-}
static void ieee80211_mesh_path_timer(unsigned long data)
{
@@ -360,44 +336,6 @@
ieee80211_queue_work(&local->hw, &ifmsh->work);
}
-struct mesh_table *mesh_table_grow(struct mesh_table *tbl)
-{
- struct mesh_table *newtbl;
- struct hlist_head *oldhash;
- struct hlist_node *p, *q;
- int i;
-
- if (atomic_read(&tbl->entries)
- < tbl->mean_chain_len * (tbl->hash_mask + 1))
- goto endgrow;
-
- newtbl = mesh_table_alloc(tbl->size_order + 1);
- if (!newtbl)
- goto endgrow;
-
- newtbl->free_node = tbl->free_node;
- newtbl->mean_chain_len = tbl->mean_chain_len;
- newtbl->copy_node = tbl->copy_node;
- atomic_set(&newtbl->entries, atomic_read(&tbl->entries));
-
- oldhash = tbl->hash_buckets;
- for (i = 0; i <= tbl->hash_mask; i++)
- hlist_for_each(p, &oldhash[i])
- if (tbl->copy_node(p, newtbl) < 0)
- goto errcopy;
-
- return newtbl;
-
-errcopy:
- for (i = 0; i <= newtbl->hash_mask; i++) {
- hlist_for_each_safe(p, q, &newtbl->hash_buckets[i])
- tbl->free_node(p, 0);
- }
- __mesh_table_free(newtbl);
-endgrow:
- return NULL;
-}
-
/**
* ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
* @hdr: 802.11 frame header
@@ -487,7 +425,6 @@
if (free_plinks != sdata->u.mesh.accepting_plinks)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
- ifmsh->housekeeping = false;
mod_timer(&ifmsh->housekeeping_timer,
round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
}
@@ -524,8 +461,8 @@
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
struct ieee80211_local *local = sdata->local;
- ifmsh->housekeeping = true;
- queue_work(local->hw, &ifmsh->work);
+ ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING;
+ ieee80211_queue_work(&local->hw, &ifmsh->work);
sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
BSS_CHANGED_BEACON_ENABLED |
@@ -664,7 +601,13 @@
ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
mesh_path_start_discovery(sdata);
- if (ifmsh->housekeeping)
+ if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
+ mesh_mpath_table_grow();
+
+ if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
+ mesh_mpp_table_grow();
+
+ if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
ieee80211_mesh_housekeeping(sdata, ifmsh);
}