Merge branch 'rhashtable-New-features-in-walk-and-bucket'

Tom Herbert says:

====================
rhashtable: New features in walk and bucket

This patch contains some changes to related rhashtable:

- Above allow rhashtable_walk_start to return void
- Add a functon to peek at the next entry during a walk
- Abstract out function to compute a has for a table
- A library function to alloc a spinlocks bucket array
- Call the above function for rhashtable locks allocation

Tested: Exercised using various operations on an ILA xlat
table.

v2:
 - Apply feedback from Herbert. Don't change semantics of resize
   event reporting and -EAGAIN, just simplify API for callers that
   ignore those.
 - Add end_of_table in iter to reliably tell when the iterator has
   reached to the eno.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 24 deletions

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 86c8dfef56a4..a5125624a76d 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -257,9 +257,7 @@ __mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
         if (ret)
                 return NULL;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto err;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -269,7 +267,6 @@ __mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
                 if (i++ == idx)
                         break;
         }
-err:
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 
@@ -513,9 +510,7 @@ void mesh_plink_broken(struct sta_info *sta)
         if (ret)
                 return;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto out;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -535,7 +530,6 @@ void mesh_plink_broken(struct sta_info *sta)
                                 WLAN_REASON_MESH_PATH_DEST_UNREACHABLE, bcast);
                 }
         }
-out:
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 }
@@ -584,9 +578,7 @@ void mesh_path_flush_by_nexthop(struct sta_info *sta)
         if (ret)
                 return;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto out;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -597,7 +589,7 @@ void mesh_path_flush_by_nexthop(struct sta_info *sta)
                 if (rcu_access_pointer(mpath->next_hop) == sta)
                         __mesh_path_del(tbl, mpath);
         }
-out:
+
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 }
@@ -614,9 +606,7 @@ static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
         if (ret)
                 return;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto out;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -627,7 +617,7 @@ static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
                 if (ether_addr_equal(mpath->mpp, proxy))
                         __mesh_path_del(tbl, mpath);
         }
-out:
+
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 }
@@ -642,9 +632,7 @@ static void table_flush_by_iface(struct mesh_table *tbl)
         if (ret)
                 return;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto out;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -653,7 +641,7 @@ static void table_flush_by_iface(struct mesh_table *tbl)
                         break;
                 __mesh_path_del(tbl, mpath);
         }
-out:
+
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 }
@@ -873,9 +861,7 @@ void mesh_path_tbl_expire(struct ieee80211_sub_if_data *sdata,
         if (ret)
                 return;
 
-        ret = rhashtable_walk_start(&iter);
-        if (ret && ret != -EAGAIN)
-                goto out;
+        rhashtable_walk_start(&iter);
 
         while ((mpath = rhashtable_walk_next(&iter))) {
                 if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
@@ -887,7 +873,7 @@ void mesh_path_tbl_expire(struct ieee80211_sub_if_data *sdata,
                      time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
                         __mesh_path_del(tbl, mpath);
         }
-out:
+
         rhashtable_walk_stop(&iter);
         rhashtable_walk_exit(&iter);
 }