X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;ds=inline;f=src%2Fvnet%2Fadj%2Fadj_glean.c;h=0313407b6f141ba16d461bf5b14c5da9c893cc08;hb=2f4586d9b3507243918c11ce99b9d151d5bde7a0;hp=09e6c0a0da9d33a78b161a112cd6db7d4414cc85;hpb=8b30e471df4d42214619e1d6c50cc8298426b45f;p=vpp.git

diff --git a/src/vnet/adj/adj_glean.c b/src/vnet/adj/adj_glean.c
index 09e6c0a0da9..0313407b6f1 100644
--- a/src/vnet/adj/adj_glean.c
+++ b/src/vnet/adj/adj_glean.c
@@ -19,24 +19,86 @@
 
 /*
  * The 'DB' of all glean adjs.
- * There is only one glean per-interface per-protocol, so this is a per-interface
- * vector
+ * There is one glean per-{interface, protocol, connected prefix}
  */
-static adj_index_t *adj_gleans[FIB_PROTOCOL_MAX];
+static uword **adj_gleans[FIB_PROTOCOL_IP_MAX];
 
-static inline vlib_node_registration_t*
+static inline u32
 adj_get_glean_node (fib_protocol_t proto)
 {
     switch (proto) {
     case FIB_PROTOCOL_IP4:
-	return (&ip4_glean_node);
+	return (ip4_glean_node.index);
     case FIB_PROTOCOL_IP6:
-	return (&ip6_glean_node);
+	return (ip6_glean_node.index);
     case FIB_PROTOCOL_MPLS:
 	break;
     }
     ASSERT(0);
-    return (NULL);
+    return (~0);
+}
+
+static adj_index_t
+adj_glean_db_lookup (fib_protocol_t proto,
+                     u32 sw_if_index,
+                     const ip46_address_t *nh_addr)
+{
+    uword *p;
+
+    if (vec_len(adj_gleans[proto]) <= sw_if_index)
+        return (ADJ_INDEX_INVALID);
+
+    p = hash_get_mem (adj_gleans[proto][sw_if_index], nh_addr);
+
+    if (p)
+        return (p[0]);
+
+    return (ADJ_INDEX_INVALID);
+}
+
+static void
+adj_glean_db_insert (fib_protocol_t proto,
+                     u32 sw_if_index,
+                     const ip46_address_t *nh_addr,
+                     adj_index_t ai)
+{
+    vlib_main_t *vm = vlib_get_main();
+
+    vlib_worker_thread_barrier_sync(vm);
+
+    vec_validate(adj_gleans[proto], sw_if_index);
+
+    if (NULL == adj_gleans[proto][sw_if_index])
+    {
+        adj_gleans[proto][sw_if_index] =
+            hash_create_mem (0, sizeof(ip46_address_t), sizeof(adj_index_t));
+    }
+
+    hash_set_mem_alloc (&adj_gleans[proto][sw_if_index],
+                        nh_addr, ai);
+
+    vlib_worker_thread_barrier_release(vm);
+}
+
+static void
+adj_glean_db_remove (fib_protocol_t proto,
+                     u32 sw_if_index,
+                     const ip46_address_t *nh_addr)
+{
+    vlib_main_t *vm = vlib_get_main();
+
+    vlib_worker_thread_barrier_sync(vm);
+
+    ASSERT(ADJ_INDEX_INVALID != adj_glean_db_lookup(proto, sw_if_index, nh_addr));
+    hash_unset_mem_free (&adj_gleans[proto][sw_if_index],
+                         nh_addr);
+
+    if (0 == hash_elts(adj_gleans[proto][sw_if_index]))
+    {
+        hash_free(adj_gleans[proto][sw_if_index]);
+        adj_gleans[proto][sw_if_index] = NULL;
+    }
+    vlib_worker_thread_barrier_release(vm);
 }
 
 /*
@@ -48,41 +110,50 @@ adj_get_glean_node (fib_protocol_t proto)
  */
 adj_index_t
 adj_glean_add_or_lock (fib_protocol_t proto,
+                       vnet_link_t linkt,
 		       u32 sw_if_index,
-		       const ip46_address_t *nh_addr)
+		       const fib_prefix_t *conn)
 {
     ip_adjacency_t * adj;
+    adj_index_t ai;
 
-    vec_validate_init_empty(adj_gleans[proto], sw_if_index, ADJ_INDEX_INVALID);
+    ai = adj_glean_db_lookup(proto, sw_if_index, &conn->fp_addr);
 
-    if (ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index])
+    if (ADJ_INDEX_INVALID == ai)
     {
 	adj = adj_alloc(proto);
 
 	adj->lookup_next_index = IP_LOOKUP_NEXT_GLEAN;
 	adj->ia_nh_proto = proto;
-	adj_gleans[proto][sw_if_index] = adj_get_index(adj);
-
-	if (NULL != nh_addr)
-	{
-	    adj->sub_type.glean.receive_addr = *nh_addr;
-	}
+        adj->ia_link = linkt;
+        adj->ia_node_index = adj_get_glean_node(proto);
+        ai = adj_get_index(adj);
+        adj_lock(ai);
 
+	ASSERT(conn);
+        fib_prefix_normalize(conn, &adj->sub_type.glean.rx_pfx);
 	adj->rewrite_header.sw_if_index = sw_if_index;
 	adj->rewrite_header.data_bytes = 0;
-        adj_lock(adj_get_index(adj));
+        adj->rewrite_header.max_l3_packet_bytes =
+	  vnet_sw_interface_get_mtu(vnet_get_main(), sw_if_index,
+                                    vnet_link_to_mtu(linkt));
 
 	vnet_update_adjacency_for_sw_interface(vnet_get_main(),
                                                sw_if_index,
-                                               adj_get_index(adj));
+                                               ai);
+
+	adj_glean_db_insert(proto, sw_if_index,
+                            &adj->sub_type.glean.rx_pfx.fp_addr, ai);
     }
     else
     {
-	adj = adj_get(adj_gleans[proto][sw_if_index]);
-        adj_lock(adj_get_index(adj));
+	adj = adj_get(ai);
+        adj_lock(ai);
     }
 
-    return (adj_get_index(adj));
+    adj_delegate_adj_created(adj);
+
+    return (ai);
 }
 
 /**
@@ -100,26 +171,162 @@ adj_glean_update_rewrite (adj_index_t adj_index)
     vnet_rewrite_for_sw_interface(vnet_get_main(),
                                   adj_fib_proto_2_nd(adj->ia_nh_proto),
                                   adj->rewrite_header.sw_if_index,
-                                  adj_get_glean_node(adj->ia_nh_proto)->index,
+                                  adj->ia_node_index,
                                   VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST,
                                   &adj->rewrite_header,
                                   sizeof (adj->rewrite_data));
 }
 
+static adj_walk_rc_t
+adj_glean_update_rewrite_walk (adj_index_t ai,
+                               void *data)
+{
+    adj_glean_update_rewrite(ai);
+
+    return (ADJ_WALK_RC_CONTINUE);
+}
+
+static void
+adj_glean_walk_proto (fib_protocol_t proto,
+                      u32 sw_if_index,
+                      adj_walk_cb_t cb,
+                      void *data)
+{
+    adj_index_t ai, *aip, *ais = NULL;
+    ip46_address_t *conn;
+
+    if (vec_len(adj_gleans[proto]) <= sw_if_index ||
+        NULL == adj_gleans[proto][sw_if_index])
+        return;
+
+    /*
+     * Walk first to collect the indices
+     * then walk the collection. This is safe
+     * to modifications of the hash table
+     */
+    hash_foreach_mem(conn, ai, adj_gleans[proto][sw_if_index],
+    ({
+        vec_add1(ais, ai);
+    }));
+
+    vec_foreach(aip, ais)
+    {
+        if (ADJ_WALK_RC_STOP == cb(*aip, data))
+            return;
+    }
+    vec_free(ais);
+}
+
+void
+adj_glean_walk (u32 sw_if_index,
+                adj_walk_cb_t cb,
+                void *data)
+{
+    fib_protocol_t proto;
+
+    FOR_EACH_FIB_IP_PROTOCOL(proto)
+    {
+      adj_glean_walk_proto (proto, sw_if_index, cb, data);
+    }
+}
+
 adj_index_t
 adj_glean_get (fib_protocol_t proto,
-               u32 sw_if_index)
+               u32 sw_if_index,
+               const ip46_address_t *nh)
 {
-    return (adj_gleans[proto][sw_if_index]);
+    if (NULL != nh)
+    {
+        return adj_glean_db_lookup(proto, sw_if_index, nh);
+    }
+    else
+    {
+        ip46_address_t *conn;
+        adj_index_t ai;
+
+        if (vec_len(adj_gleans[proto]) <= sw_if_index ||
+            NULL == adj_gleans[proto][sw_if_index])
+            return (ADJ_INDEX_INVALID);
+
+        hash_foreach_mem(conn, ai, adj_gleans[proto][sw_if_index],
+        ({
+            return (ai);
+        }));
+    }
+    return (ADJ_INDEX_INVALID);
+}
+
+const ip46_address_t *
+adj_glean_get_src (fib_protocol_t proto,
+                   u32 sw_if_index,
+                   const ip46_address_t *nh)
+{
+    const ip46_address_t *conn, *source;
+    const ip_adjacency_t *adj;
+    adj_index_t ai;
+
+    if (vec_len(adj_gleans[proto]) <= sw_if_index ||
+        NULL == adj_gleans[proto][sw_if_index])
+        return (NULL);
+
+    fib_prefix_t pfx = {
+        .fp_len = fib_prefix_get_host_length(proto),
+        .fp_proto = proto,
+    };
+
+    if (nh)
+        pfx.fp_addr = *nh;
+
+    /*
+     * An interface can have more than one glean address. Where
+     * possible we want to return a source address from the same
+     * subnet as the destination. If this is not possible then any address
+     * will do.
+     */
+    source = NULL;
+
+    hash_foreach_mem(conn, ai, adj_gleans[proto][sw_if_index],
+    ({
+        adj = adj_get(ai);
+
+        if (adj->sub_type.glean.rx_pfx.fp_len > 0)
+        {
+            source = &adj->sub_type.glean.rx_pfx.fp_addr;
+
+            /* if no destination is specified use the just glean */
+            if (NULL == nh)
+                return (source);
+
+            /* check the clean covers the desintation */
+            if (fib_prefix_is_cover(&adj->sub_type.glean.rx_pfx, &pfx))
+                return (source);
+        }
+    }));
+
+    return (source);
 }
 
 void
-adj_glean_remove (fib_protocol_t proto,
-		  u32 sw_if_index)
+adj_glean_remove (ip_adjacency_t *adj)
+{
+    fib_prefix_t norm;
+
+    fib_prefix_normalize(&adj->sub_type.glean.rx_pfx,
+                         &norm);
+    adj_glean_db_remove(adj->ia_nh_proto,
+                        adj->rewrite_header.sw_if_index,
+                        &norm.fp_addr);
+}
+
+static adj_walk_rc_t
+adj_glean_start_backwalk (adj_index_t ai,
+                          void *data)
 {
-    ASSERT(sw_if_index < vec_len(adj_gleans[proto]));
+    fib_node_back_walk_ctx_t bw_ctx = *(fib_node_back_walk_ctx_t*) data;
+
+    fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
 
-    adj_gleans[proto][sw_if_index] = ADJ_INDEX_INVALID;
+    return (ADJ_WALK_RC_CONTINUE);
 }
 
 static clib_error_t *
@@ -130,26 +337,13 @@ adj_glean_interface_state_change (vnet_main_t * vnm,
     /*
      * for each glean on the interface trigger a walk back to the children
      */
-    fib_protocol_t proto;
-    ip_adjacency_t *adj;
-
-
-    for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
-    {
-	if (sw_if_index >= vec_len(adj_gleans[proto]) ||
-	    ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index])
-	    continue;
-
-	adj = adj_get(adj_gleans[proto][sw_if_index]);
+    fib_node_back_walk_ctx_t bw_ctx = {
+        .fnbw_reason = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP ?
+                        FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
+                        FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
+    };
 
-	fib_node_back_walk_ctx_t bw_ctx = {
-	    .fnbw_reason = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP ?
-			    FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
-			    FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
-	};
-
-	fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx);
-    }
+    adj_glean_walk (sw_if_index, adj_glean_start_backwalk, &bw_ctx);
 
     return (NULL);
 }
@@ -160,12 +354,14 @@ VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(adj_glean_interface_state_change);
  * @brief Invoked on each SW interface of a HW interface when the
  * HW interface state changes
  */
-static void
+static walk_rc_t
 adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm,
                                       u32 sw_if_index,
                                       void *arg)
 {
     adj_glean_interface_state_change(vnm, sw_if_index, (uword) arg);
+
+    return (WALK_CONTINUE);
 }
 
 /**
@@ -200,12 +396,6 @@ adj_glean_interface_delete (vnet_main_t * vnm,
 			    u32 sw_if_index,
 			    u32 is_add)
 {
-    /*
-     * for each glean on the interface trigger a walk back to the children
-     */
-    fib_protocol_t proto;
-    ip_adjacency_t *adj;
-
     if (is_add)
     {
 	/*
@@ -224,47 +414,113 @@ adj_glean_interface_delete (vnet_main_t * vnm,
 	return (NULL);
     }
 
-    for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
-    {
-	if (sw_if_index >= vec_len(adj_gleans[proto]) ||
-	    ADJ_INDEX_INVALID == adj_gleans[proto][sw_if_index])
-	    continue;
-
-	adj = adj_get(adj_gleans[proto][sw_if_index]);
-
-	fib_node_back_walk_ctx_t bw_ctx = {
-	    .fnbw_reason =  FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
-	};
+    /*
+     * for each glean on the interface trigger a walk back to the children
+     */
+    fib_node_back_walk_ctx_t bw_ctx = {
+        .fnbw_reason =  FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
+    };
 
-	fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx);
-    }
+    adj_glean_walk (sw_if_index, adj_glean_start_backwalk, &bw_ctx);
 
     return (NULL);
 }
 
 VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_glean_interface_delete);
 
+/**
+ * Callback function invoked when an interface's MAC Address changes
+ */
+static void
+adj_glean_ethernet_change_mac (ethernet_main_t * em,
+                               u32 sw_if_index,
+                               uword opaque)
+{
+    adj_glean_walk (sw_if_index, adj_glean_update_rewrite_walk, NULL);
+}
+
+static void
+adj_glean_table_bind (fib_protocol_t fproto,
+                      u32 sw_if_index,
+                      u32 itf_fib_index)
+{
+    /*
+     * for each glean on the interface trigger a walk back to the children
+     */
+    fib_node_back_walk_ctx_t bw_ctx = {
+        .fnbw_reason =  FIB_NODE_BW_REASON_FLAG_INTERFACE_BIND,
+        .interface_bind = {
+            .fnbw_to_fib_index = itf_fib_index,
+        },
+    };
+
+    adj_glean_walk_proto (fproto, sw_if_index, adj_glean_start_backwalk, &bw_ctx);
+}
+
+
+/**
+ * Callback function invoked when an interface's IPv6 Table
+ * binding changes
+ */
+static void
+adj_glean_ip6_table_bind (ip6_main_t * im,
+                          uword opaque,
+                          u32 sw_if_index,
+                          u32 new_fib_index,
+                          u32 old_fib_index)
+{
+  adj_glean_table_bind (FIB_PROTOCOL_IP6, sw_if_index, new_fib_index);
+}
+
+/**
+ * Callback function invoked when an interface's IPv4 Table
+ * binding changes
+ */
+static void
+adj_glean_ip4_table_bind (ip4_main_t * im,
+                          uword opaque,
+                          u32 sw_if_index,
+                          u32 new_fib_index,
+                          u32 old_fib_index)
+{
+  adj_glean_table_bind (FIB_PROTOCOL_IP4, sw_if_index, new_fib_index);
+}
+
 u8*
 format_adj_glean (u8* s, va_list *ap)
 {
     index_t index = va_arg(*ap, index_t);
     CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
-    vnet_main_t * vnm = vnet_get_main();
     ip_adjacency_t * adj = adj_get(index);
 
-    s = format(s, "%U-glean: %U",
+    s = format(s, "%U-glean: [src:%U] %U",
                format_fib_protocol, adj->ia_nh_proto,
-               format_vnet_sw_interface_name,
-               vnm,
-               vnet_get_sw_interface(vnm,
-                                     adj->rewrite_header.sw_if_index));
-    s = format (s, " %U",
-		format_vnet_rewrite,
-		&adj->rewrite_header, sizeof (adj->rewrite_data), 0);
+               format_fib_prefix, &adj->sub_type.glean.rx_pfx,
+               format_vnet_rewrite,
+               &adj->rewrite_header, sizeof (adj->rewrite_data), 0);
 
     return (s);
 }
 
+u32
+adj_glean_db_size (void)
+{
+    fib_protocol_t proto;
+    u32 sw_if_index = 0;
+    u64 count = 0;
+
+    FOR_EACH_FIB_IP_PROTOCOL(proto)
+    {
+	vec_foreach_index(sw_if_index, adj_gleans[proto])
+	{
+	    if (NULL != adj_gleans[proto][sw_if_index])
+	    {
+		count += hash_elts(adj_gleans[proto][sw_if_index]);
+	    }
+	}
+    }
+    return (count);
+}
 
 static void
 adj_dpo_lock (dpo_id_t *dpo)
@@ -282,6 +538,7 @@ const static dpo_vft_t adj_glean_dpo_vft = {
     .dv_unlock = adj_dpo_unlock,
     .dv_format = format_adj_glean,
     .dv_get_urpf = adj_dpo_get_urpf,
+    .dv_get_mtu = adj_dpo_get_mtu,
 };
 
 /**
@@ -313,4 +570,20 @@ void
 adj_glean_module_init (void)
 {
     dpo_register(DPO_ADJACENCY_GLEAN, &adj_glean_dpo_vft, glean_nodes);
+
+    ethernet_address_change_ctx_t ctx = {
+        .function = adj_glean_ethernet_change_mac,
+        .function_opaque = 0,
+    };
+    vec_add1 (ethernet_main.address_change_callbacks, ctx);
+
+    ip6_table_bind_callback_t cbt6 = {
+        .function = adj_glean_ip6_table_bind,
+    };
+    vec_add1 (ip6_main.table_bind_callbacks, cbt6);
+
+    ip4_table_bind_callback_t cbt4 = {
+        .function = adj_glean_ip4_table_bind,
+    };
+    vec_add1 (ip4_main.table_bind_callbacks, cbt4);
 }