Leak locks and tables in the Classifier

Change-Id: Iae04c57bba87ab3665388eadd0805f75171636a5
Signed-off-by: Neale Ranns <nranns@cisco.com>

2 files changed, 45 insertions, 3 deletions

diff --git a/src/vnet/classify/vnet_classify.c b/src/vnet/classify/vnet_classify.c
index 418e3da8250..99b10dc295c 100644
--- a/src/vnet/classify/vnet_classify.c
+++ b/src/vnet/classify/vnet_classify.c
@@ -362,6 +362,34 @@ split_and_rehash_linear (vnet_classify_table_t * t,
   return new_values;
 }
 
+static void
+vnet_classify_entry_claim_resource (vnet_classify_entry_t *e)
+{
+    switch (e->action)
+    {
+    case CLASSIFY_ACTION_SET_IP4_FIB_INDEX:
+        fib_table_lock (e->metadata, FIB_PROTOCOL_IP4);
+        break;
+    case CLASSIFY_ACTION_SET_IP6_FIB_INDEX:
+        fib_table_lock (e->metadata, FIB_PROTOCOL_IP6);
+        break;
+    }
+}
+
+static void
+vnet_classify_entry_release_resource (vnet_classify_entry_t *e)
+{
+    switch (e->action)
+    {
+    case CLASSIFY_ACTION_SET_IP4_FIB_INDEX:
+        fib_table_unlock (e->metadata, FIB_PROTOCOL_IP4);
+        break;
+    case CLASSIFY_ACTION_SET_IP6_FIB_INDEX:
+        fib_table_unlock (e->metadata, FIB_PROTOCOL_IP6);
+        break;
+    }
+}
+
 int vnet_classify_add_del (vnet_classify_table_t * t, 
                            vnet_classify_entry_t * add_v,
                            int is_add)
@@ -408,6 +436,7 @@ int vnet_classify_add_del (vnet_classify_table_t * t,
       clib_memcpy (v, add_v, sizeof (vnet_classify_entry_t) +
               t->match_n_vectors * sizeof (u32x4));
       v->flags &= ~(VNET_CLASSIFY_ENTRY_FREE);
+      vnet_classify_entry_claim_resource (v);
 
       tmp_b.as_u64 = 0;
       tmp_b.offset = vnet_classify_get_offset (t, v);
@@ -445,6 +474,7 @@ int vnet_classify_add_del (vnet_classify_table_t * t,
               clib_memcpy (v, add_v, sizeof (vnet_classify_entry_t) +
                       t->match_n_vectors * sizeof(u32x4));
               v->flags &= ~(VNET_CLASSIFY_ENTRY_FREE);
+              vnet_classify_entry_claim_resource (v);
 
               CLIB_MEMORY_BARRIER();
               /* Restore the previous (k,v) pairs */
@@ -461,6 +491,8 @@ int vnet_classify_add_del (vnet_classify_table_t * t,
               clib_memcpy (v, add_v, sizeof (vnet_classify_entry_t) +
                       t->match_n_vectors * sizeof(u32x4));
               v->flags &= ~(VNET_CLASSIFY_ENTRY_FREE);
+              vnet_classify_entry_claim_resource (v);
+
               CLIB_MEMORY_BARRIER();
               b->as_u64 = t->saved_bucket.as_u64;
               t->active_elements ++;
@@ -477,9 +509,11 @@ int vnet_classify_add_del (vnet_classify_table_t * t,
 
           if (!memcmp (v->key, add_v->key, t->match_n_vectors * sizeof (u32x4)))
             {
+              vnet_classify_entry_release_resource (v);
               memset (v, 0xff, sizeof (vnet_classify_entry_t) +
                       t->match_n_vectors * sizeof(u32x4));
               v->flags |= VNET_CLASSIFY_ENTRY_FREE;
+
               CLIB_MEMORY_BARRIER();
               b->as_u64 = t->saved_bucket.as_u64;
               t->active_elements --;
@@ -552,6 +586,8 @@ int vnet_classify_add_del (vnet_classify_table_t * t,
           clib_memcpy (new_v, add_v, sizeof (vnet_classify_entry_t) +
                   t->match_n_vectors * sizeof(u32x4));
           new_v->flags &= ~(VNET_CLASSIFY_ENTRY_FREE);
+          vnet_classify_entry_claim_resource (new_v);
+
           goto expand_ok;
         }
     }
@@ -2075,6 +2111,9 @@ int vnet_classify_add_del_session (vnet_classify_main_t * cm,
     e->key[i] &= t->mask[i];
 
   rv = vnet_classify_add_del (t, e, is_add);
+
+  vnet_classify_entry_release_resource(e);
+
   if (rv)
     return VNET_API_ERROR_NO_SUCH_ENTRY;
   return 0;
diff --git a/src/vnet/classify/vnet_classify.h b/src/vnet/classify/vnet_classify.h
index ffe3dff6a9c..1eb5b14d024 100644
--- a/src/vnet/classify/vnet_classify.h
+++ b/src/vnet/classify/vnet_classify.h
@@ -62,8 +62,11 @@ extern vlib_node_registration_t ip6_classify_node;
  *   - Classified IP packets will be looked up
  *     from the specified ipv6 fib table
  */
-#define CLASSIFY_ACTION_SET_IP4_FIB_INDEX       1
-#define CLASSIFY_ACTION_SET_IP6_FIB_INDEX       2
+typedef enum vnet_classify_action_t_
+{
+  CLASSIFY_ACTION_SET_IP4_FIB_INDEX = 1,
+  CLASSIFY_ACTION_SET_IP6_FIB_INDEX = 2,
+} __attribute__ ((packed)) vnet_classify_action_t;
 
 struct _vnet_classify_main;
 typedef struct _vnet_classify_main vnet_classify_main_t;
@@ -93,7 +96,7 @@ typedef CLIB_PACKED(struct _vnet_classify_entry {
   u8 flags;
 #define VNET_CLASSIFY_ENTRY_FREE	(1<<0)
 
-  u8 action;
+  vnet_classify_action_t action;
   u16 metadata;
 
   /* Hit counter, last heard time */