1 files changed, 90 insertions, 61 deletions

diff --git a/src/plugins/acl/hash_lookup.c b/src/plugins/acl/hash_lookup.c
index f16f7b2fd59..82df45ea304 100644
--- a/src/plugins/acl/hash_lookup.c
+++ b/src/plugins/acl/hash_lookup.c
@@ -258,13 +258,75 @@ relax_tuple(fa_5tuple_t *mask, int is_ip6, int relax2){
 	DBG( "TM-relaxing-end");
 }
 
+static u32
+find_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
+{
+  ace_mask_type_entry_t *mte;
+  /* *INDENT-OFF* */
+  pool_foreach(mte, am->ace_mask_type_pool,
+  ({
+    if(memcmp(&mte->mask, mask, sizeof(*mask)) == 0)
+      return (mte - am->ace_mask_type_pool);
+  }));
+  /* *INDENT-ON* */
+  return ~0;
+}
+
+static u32
+assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
+{
+  u32 mask_type_index = find_mask_type_index(am, mask);
+  ace_mask_type_entry_t *mte;
+  if(~0 == mask_type_index) {
+    pool_get_aligned (am->ace_mask_type_pool, mte, CLIB_CACHE_LINE_BYTES);
+    mask_type_index = mte - am->ace_mask_type_pool;
+    clib_memcpy(&mte->mask, mask, sizeof(mte->mask));
+    mte->refcount = 0;
+
+    /*
+     * We can use only 16 bits, since in the match there is only u16 field.
+     * Realistically, once you go to 64K of mask types, it is a huge
+     * problem anyway, so we might as well stop half way.
+     */
+    ASSERT(mask_type_index < 32768);
+  }
+  mte = am->ace_mask_type_pool + mask_type_index;
+  mte->refcount++;
+  DBG0("ASSIGN MTE index %d new refcount %d", mask_type_index, mte->refcount);
+  return mask_type_index;
+}
+
+static void
+lock_mask_type_index(acl_main_t *am, u32 mask_type_index)
+{
+  DBG0("LOCK MTE index %d", mask_type_index);
+  ace_mask_type_entry_t *mte = pool_elt_at_index(am->ace_mask_type_pool, mask_type_index);
+  mte->refcount++;
+  DBG0("LOCK MTE index %d new refcount %d", mask_type_index, mte->refcount);
+}
+
+
+static void
+release_mask_type_index(acl_main_t *am, u32 mask_type_index)
+{
+  DBG0("RELEAS MTE index %d", mask_type_index);
+  ace_mask_type_entry_t *mte = pool_elt_at_index(am->ace_mask_type_pool, mask_type_index);
+  mte->refcount--;
+  DBG0("RELEAS MTE index %d new refcount %d", mask_type_index, mte->refcount);
+  if (mte->refcount == 0) {
+    /* we are not using this entry anymore */
+    memset(mte, 0xae, sizeof(*mte));
+    pool_put(am->ace_mask_type_pool, mte);
+  }
+}
+
 
 static u32
 tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_index)
 {
 	u32 mask_type_index = ~0;
 	u32 for_mask_type_index = ~0;
-	ace_mask_type_entry_t *mte;
+	ace_mask_type_entry_t *mte = 0;
 	int order_index;
 	/* look for existing mask comparable with the one in input */
 
@@ -278,6 +340,7 @@ tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_
 		mte = vec_elt_at_index(am->ace_mask_type_pool, for_mask_type_index);
 		if(first_mask_contains_second_mask(is_ip6, &mte->mask, mask)){
 			mask_type_index = (mte - am->ace_mask_type_pool);
+			lock_mask_type_index(am, mask_type_index);
 			break;
 		}
             }
@@ -286,8 +349,9 @@ tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_
 	if(~0 == mask_type_index) {
 		/* if no mask is found, then let's use a relaxed version of the original one, in order to be used by new ace_entries */
 		DBG( "TM-assigning mask type index-new one");
-		pool_get_aligned (am->ace_mask_type_pool, mte, CLIB_CACHE_LINE_BYTES);
-		mask_type_index = mte - am->ace_mask_type_pool;
+		fa_5tuple_t relaxed_mask = *mask;
+		relax_tuple(&relaxed_mask, is_ip6, 0);
+		mask_type_index = assign_mask_type_index(am, &relaxed_mask);
 
 		hash_applied_mask_info_t **hash_applied_mask_info_vec = vec_elt_at_index(am->hash_applied_mask_info_vec_by_lc_index, lc_index);
 
@@ -299,10 +363,6 @@ tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_
 		minfo->max_collisions = 0;
 		minfo->first_rule_index = ~0;
 
-		clib_memcpy(&mte->mask, mask, sizeof(mte->mask));
-		relax_tuple(&mte->mask, is_ip6, 0);
-
-		mte->refcount = 0;
 		/*
 		 * We can use only 16 bits, since in the match there is only u16 field.
 		 * Realistically, once you go to 64K of mask types, it is a huge
@@ -311,7 +371,7 @@ tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_
 		ASSERT(mask_type_index < 32768);
 	}
 	mte = am->ace_mask_type_pool + mask_type_index;
-	mte->refcount++;
+	DBG0("TM-ASSIGN MTE index %d new refcount %d", mask_type_index, mte->refcount);
 	return mask_type_index;
 }
 
@@ -361,58 +421,12 @@ add_del_hashtable_entry(acl_main_t *am,
 }
 
 
-static u32
-find_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
-{
-  ace_mask_type_entry_t *mte;
-  /* *INDENT-OFF* */
-  pool_foreach(mte, am->ace_mask_type_pool,
-  ({
-    if(memcmp(&mte->mask, mask, sizeof(*mask)) == 0)
-      return (mte - am->ace_mask_type_pool);
-  }));
-  /* *INDENT-ON* */
-  return ~0;
-}
-
-static u32
-assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
-{
-  u32 mask_type_index = find_mask_type_index(am, mask);
-  ace_mask_type_entry_t *mte;
-  if(~0 == mask_type_index) {
-    pool_get_aligned (am->ace_mask_type_pool, mte, CLIB_CACHE_LINE_BYTES);
-    mask_type_index = mte - am->ace_mask_type_pool;
-    clib_memcpy(&mte->mask, mask, sizeof(mte->mask));
-    mte->refcount = 0;
-    /*
-     * We can use only 16 bits, since in the match there is only u16 field.
-     * Realistically, once you go to 64K of mask types, it is a huge
-     * problem anyway, so we might as well stop half way.
-     */
-    ASSERT(mask_type_index < 32768);
-  }
-  mte = am->ace_mask_type_pool + mask_type_index;
-  mte->refcount++;
-  return mask_type_index;
-}
-
-static void
-release_mask_type_index(acl_main_t *am, u32 mask_type_index)
-{
-  ace_mask_type_entry_t *mte = pool_elt_at_index(am->ace_mask_type_pool, mask_type_index);
-  mte->refcount--;
-  if (mte->refcount == 0) {
-    /* we are not using this entry anymore */
-    pool_put(am->ace_mask_type_pool, mte);
-  }
-}
-
 static void
 remake_hash_applied_mask_info_vec (acl_main_t * am,
                                    applied_hash_ace_entry_t **
                                    applied_hash_aces, u32 lc_index)
 {
+  DBG0("remake applied hash mask info lc_index %d", lc_index);
   hash_applied_mask_info_t *new_hash_applied_mask_info_vec =
     vec_new (hash_applied_mask_info_t, 0);
 
@@ -438,6 +452,7 @@ remake_hash_applied_mask_info_vec (acl_main_t * am,
       minfo = vec_elt_at_index ((new_hash_applied_mask_info_vec), search);
       if (search == new_pointer)
         {
+          DBG0("remaking index %d", search);
           minfo->mask_type_index = pae->mask_type_index;
           minfo->num_entries = 0;
           minfo->max_collisions = 0;
@@ -857,6 +872,10 @@ deactivate_applied_ace_hash_entry(acl_main_t *am,
 {
   applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), old_index);
   DBG("UNAPPLY DEACTIVATE: lc_index %d applied index %d", lc_index, old_index);
+  if (ACL_HASH_LOOKUP_DEBUG > 0) {
+    clib_warning("Deactivating pae at index %d", old_index);
+    acl_plugin_print_pae(am->vlib_main, old_index, pae);
+  }
 
   if (pae->prev_applied_entry_index != ~0) {
     DBG("UNAPPLY = index %d has prev_applied_entry_index %d", old_index, pae->prev_applied_entry_index);
@@ -898,7 +917,7 @@ deactivate_applied_ace_hash_entry(acl_main_t *am,
                               applied_hash_aces, old_index, 0);
     }
   }
-
+  DBG0("Releasing mask type index %d for pae index %d on lc_index %d", pae->mask_type_index, old_index, lc_index);
   release_mask_type_index(am, pae->mask_type_index);
   /* invalidate the old entry */
   pae->mask_type_index = ~0;
@@ -922,6 +941,13 @@ hash_acl_unapply(acl_main_t *am, u32 lc_index, int acl_index)
   hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
   u32 **hash_acl_applied_lc_index = &ha->lc_index_list;
 
+  if (ACL_HASH_LOOKUP_DEBUG > 0) {
+    clib_warning("unapplying acl %d", acl_index);
+    acl_plugin_show_tables_mask_type();
+    acl_plugin_show_tables_acl_hash_info(acl_index);
+    acl_plugin_show_tables_applied_info(lc_index);
+  }
+
   /* remove this acl# from the list of applied hash acls */
   u32 index = vec_search(pal->applied_acls, acl_index);
   if (index == ~0) {
@@ -966,7 +992,7 @@ hash_acl_unapply(acl_main_t *am, u32 lc_index, int acl_index)
   for(i=0; i < tail_len; i ++) {
     /* move the entry at tail offset to base offset */
     /* that is, from (tail_offset+i) -> (base_offset+i) */
-    DBG("UNAPPLY MOVE: lc_index %d, applied index %d -> %d", lc_index, tail_offset+i, base_offset + i);
+    DBG0("UNAPPLY MOVE: lc_index %d, applied index %d -> %d", lc_index, tail_offset+i, base_offset + i);
     move_applied_ace_hash_entry(am, lc_index, applied_hash_aces, tail_offset + i, base_offset + i);
   }
   /* trim the end of the vector */
@@ -1278,9 +1304,9 @@ static void
 acl_plugin_print_pae (vlib_main_t * vm, int j, applied_hash_ace_entry_t * pae)
 {
   vlib_cli_output (vm,
-		   "    %4d: acl %d rule %d action %d bitmask-ready rule %d colliding_rules: %d next %d prev %d tail %d hitcount %lld acl_pos: %d",
+		   "    %4d: acl %d rule %d action %d bitmask-ready rule %d mask type index: %d colliding_rules: %d next %d prev %d tail %d hitcount %lld acl_pos: %d",
 		   j, pae->acl_index, pae->ace_index, pae->action,
-		   pae->hash_ace_info_index, vec_len(pae->colliding_rules), pae->next_applied_entry_index,
+		   pae->hash_ace_info_index, pae->mask_type_index, vec_len(pae->colliding_rules), pae->next_applied_entry_index,
 		   pae->prev_applied_entry_index,
 		   pae->tail_applied_entry_index, pae->hitcount, pae->acl_position);
   int jj;
@@ -1456,7 +1482,6 @@ split_partition(acl_main_t *am, u32 first_index,
 
 	int i=0;
 	u64 collisions = vec_len(pae->colliding_rules);
-//	while(pae->next_applied_entry_index == ~0){
 	for(i=0; i<collisions; i++){
 
 		DBG( "TM-collision: base_ace:%d (ace_mask:%d, first_collision_mask:%d)",
@@ -1507,7 +1532,7 @@ split_partition(acl_main_t *am, u32 first_index,
 				max_tuple->pkt.as_u64 = mask->pkt.as_u64;
 		}
 
-		pae = vec_elt_at_index((*applied_hash_aces), pae->next_applied_entry_index);
+		pae = pae->next_applied_entry_index == ~0 ? 0 : vec_elt_at_index((*applied_hash_aces), pae->next_applied_entry_index);
 	}
 
 	/* Computing field with max difference between (min/max)_mask */
@@ -1632,6 +1657,7 @@ split_partition(acl_main_t *am, u32 first_index,
 	/* populate new partition */
 	DBG( "TM-Populate new partition");
 	u32 r_ace_index = first_index;
+        int repopulate_count = 0;
 
 //	for(i=0; i<collisions; i++){
 	for(r_ace_index=0; r_ace_index < vec_len((*applied_hash_aces)); r_ace_index++) {
@@ -1657,6 +1683,9 @@ split_partition(acl_main_t *am, u32 first_index,
 
 		/* insert the new entry */
 		pop_pae->mask_type_index = new_mask_type_index;
+                /* The very first repopulation gets the lock by virtue of a new mask being created above */
+                if (++repopulate_count > 1)
+                  lock_mask_type_index(am, new_mask_type_index);
 
 		activate_applied_ace_hash_entry(am, lc_index, applied_hash_aces, r_ace_index);