X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Ftransport.c;h=c2d21bf28f915cd9efa433e5f0f6c1c582fb1c04;hb=671e60e65635b8d030bf303c88411192c747b59e;hp=abd94ba4f1d601fdd69c3744242b8cf96ad2e366;hpb=68b0fb0c620c7451ef1a6380c43c39de6614db51;p=vpp.git

diff --git a/src/vnet/session/transport.c b/src/vnet/session/transport.c
index abd94ba4f1d..c2d21bf28f9 100644
--- a/src/vnet/session/transport.c
+++ b/src/vnet/session/transport.c
@@ -13,52 +13,663 @@
  * limitations under the License.
  */
 
-#include <vnet/session/transport.h>
+#include <vnet/session/transport_interface.h>
+#include <vnet/session/session.h>
+#include <vnet/fib/fib.h>
+
+/**
+ * Per-type vector of transport protocol virtual function tables
+ */
+transport_proto_vft_t *tp_vfts;
+
+/*
+ * Port allocator seed
+ */
+static u32 port_allocator_seed;
+
+/*
+ * Local endpoints table
+ */
+static transport_endpoint_table_t local_endpoints_table;
+
+/*
+ * Pool of local endpoints
+ */
+static transport_endpoint_t *local_endpoints;
+
+/*
+ * Local endpoints pool lock
+ */
+static clib_spinlock_t local_endpoints_lock;
+
+/*
+ * Period used by transport pacers. Initialized by session layer
+ */
+static double transport_pacer_period;
+
+#define TRANSPORT_PACER_MIN_MSS 	1460
+#define TRANSPORT_PACER_MIN_BURST 	TRANSPORT_PACER_MIN_MSS
+
+u8 *
+format_transport_proto (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  switch (transport_proto)
+    {
+    case TRANSPORT_PROTO_TCP:
+      s = format (s, "TCP");
+      break;
+    case TRANSPORT_PROTO_UDP:
+      s = format (s, "UDP");
+      break;
+    case TRANSPORT_PROTO_SCTP:
+      s = format (s, "SCTP");
+      break;
+    case TRANSPORT_PROTO_UDPC:
+      s = format (s, "UDPC");
+      break;
+    }
+  return s;
+}
+
+u8 *
+format_transport_proto_short (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  switch (transport_proto)
+    {
+    case TRANSPORT_PROTO_TCP:
+      s = format (s, "T");
+      break;
+    case TRANSPORT_PROTO_UDP:
+      s = format (s, "U");
+      break;
+    case TRANSPORT_PROTO_SCTP:
+      s = format (s, "S");
+      break;
+    case TRANSPORT_PROTO_UDPC:
+      s = format (s, "U");
+      break;
+    }
+  return s;
+}
+
+u8 *
+format_transport_connection (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  u32 conn_index = va_arg (*args, u32);
+  u32 thread_index = va_arg (*args, u32);
+  u32 verbose = va_arg (*args, u32);
+  transport_proto_vft_t *tp_vft;
+  transport_connection_t *tc;
+  u32 indent;
+
+  tp_vft = transport_protocol_get_vft (transport_proto);
+  if (!tp_vft)
+    return s;
+
+  s = format (s, "%U", tp_vft->format_connection, conn_index, thread_index,
+	      verbose);
+  tc = tp_vft->get_connection (conn_index, thread_index);
+  if (tc && transport_connection_is_tx_paced (tc) && verbose > 1)
+    {
+      indent = format_get_indent (s) + 1;
+      s = format (s, "%Upacer: %U\n", format_white_space, indent,
+		  format_transport_pacer, &tc->pacer);
+    }
+  return s;
+}
+
+u8 *
+format_transport_listen_connection (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  u32 listen_index = va_arg (*args, u32);
+  transport_proto_vft_t *tp_vft;
+
+  tp_vft = transport_protocol_get_vft (transport_proto);
+  if (!tp_vft)
+    return s;
+
+  s = format (s, "%U", tp_vft->format_listener, listen_index);
+  return s;
+}
+
+u8 *
+format_transport_half_open_connection (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  u32 listen_index = va_arg (*args, u32);
+  transport_proto_vft_t *tp_vft;
+
+  tp_vft = transport_protocol_get_vft (transport_proto);
+  if (!tp_vft)
+    return s;
+
+  s = format (s, "%U", tp_vft->format_half_open, listen_index);
+  return s;
+}
+
+uword
+unformat_transport_proto (unformat_input_t * input, va_list * args)
+{
+  u32 *proto = va_arg (*args, u32 *);
+  if (unformat (input, "tcp"))
+    *proto = TRANSPORT_PROTO_TCP;
+  else if (unformat (input, "TCP"))
+    *proto = TRANSPORT_PROTO_TCP;
+  else if (unformat (input, "udp"))
+    *proto = TRANSPORT_PROTO_UDP;
+  else if (unformat (input, "UDP"))
+    *proto = TRANSPORT_PROTO_UDP;
+  else if (unformat (input, "sctp"))
+    *proto = TRANSPORT_PROTO_SCTP;
+  else if (unformat (input, "SCTP"))
+    *proto = TRANSPORT_PROTO_SCTP;
+  else if (unformat (input, "tls"))
+    *proto = TRANSPORT_PROTO_TLS;
+  else if (unformat (input, "TLS"))
+    *proto = TRANSPORT_PROTO_TLS;
+  else if (unformat (input, "udpc"))
+    *proto = TRANSPORT_PROTO_UDPC;
+  else if (unformat (input, "UDPC"))
+    *proto = TRANSPORT_PROTO_UDPC;
+  else
+    return 0;
+  return 1;
+}
 
 u32
-transport_endpoint_lookup (transport_endpoint_table_t *ht, ip46_address_t *ip,
-                           u16 port)
+transport_endpoint_lookup (transport_endpoint_table_t * ht, u8 proto,
+			   ip46_address_t * ip, u16 port)
 {
   clib_bihash_kv_24_8_t kv;
   int rv;
 
   kv.key[0] = ip->as_u64[0];
   kv.key[1] = ip->as_u64[1];
-  kv.key[2] = port;
+  kv.key[2] = (u64) port << 8 | (u64) proto;
 
   rv = clib_bihash_search_inline_24_8 (ht, &kv);
   if (rv == 0)
     return kv.value;
 
-  return TRANSPORT_ENDPOINT_INVALID_INDEX;
+  return ENDPOINT_INVALID_INDEX;
 }
 
 void
-transport_endpoint_table_add (transport_endpoint_table_t *ht,
-                              transport_endpoint_t *te, u32 value)
+transport_endpoint_table_add (transport_endpoint_table_t * ht, u8 proto,
+			      transport_endpoint_t * te, u32 value)
 {
   clib_bihash_kv_24_8_t kv;
 
   kv.key[0] = te->ip.as_u64[0];
   kv.key[1] = te->ip.as_u64[1];
-  kv.key[2] = te->port;
+  kv.key[2] = (u64) te->port << 8 | (u64) proto;
   kv.value = value;
 
   clib_bihash_add_del_24_8 (ht, &kv, 1);
 }
 
 void
-transport_endpoint_table_del (transport_endpoint_table_t *ht,
-                              transport_endpoint_t *te)
+transport_endpoint_table_del (transport_endpoint_table_t * ht, u8 proto,
+			      transport_endpoint_t * te)
 {
   clib_bihash_kv_24_8_t kv;
 
   kv.key[0] = te->ip.as_u64[0];
   kv.key[1] = te->ip.as_u64[1];
-  kv.key[2] = te->port;
+  kv.key[2] = (u64) te->port << 8 | (u64) proto;
 
   clib_bihash_add_del_24_8 (ht, &kv, 0);
 }
 
+/**
+ * Register transport virtual function table.
+ *
+ * @param transport_proto - transport protocol type (i.e., TCP, UDP ..)
+ * @param vft - virtual function table for transport proto
+ * @param fib_proto - network layer protocol
+ * @param output_node - output node index that session layer will hand off
+ * 			buffers to, for requested fib proto
+ */
+void
+transport_register_protocol (transport_proto_t transport_proto,
+			     const transport_proto_vft_t * vft,
+			     fib_protocol_t fib_proto, u32 output_node)
+{
+  u8 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
+
+  vec_validate (tp_vfts, transport_proto);
+  tp_vfts[transport_proto] = *vft;
+
+  session_register_transport (transport_proto, vft, is_ip4, output_node);
+}
+
+/**
+ * Get transport virtual function table
+ *
+ * @param type - session type (not protocol type)
+ */
+transport_proto_vft_t *
+transport_protocol_get_vft (transport_proto_t transport_proto)
+{
+  if (transport_proto >= vec_len (tp_vfts))
+    return 0;
+  return &tp_vfts[transport_proto];
+}
+
+transport_service_type_t
+transport_protocol_service_type (transport_proto_t tp)
+{
+  return tp_vfts[tp].service_type;
+}
+
+transport_tx_fn_type_t
+transport_protocol_tx_fn_type (transport_proto_t tp)
+{
+  return tp_vfts[tp].tx_type;
+}
+
+u8
+transport_protocol_is_cl (transport_proto_t tp)
+{
+  return (tp_vfts[tp].service_type == TRANSPORT_SERVICE_CL);
+}
+
+#define PORT_MASK ((1 << 16)- 1)
+
+void
+transport_endpoint_del (u32 tepi)
+{
+  clib_spinlock_lock_if_init (&local_endpoints_lock);
+  pool_put_index (local_endpoints, tepi);
+  clib_spinlock_unlock_if_init (&local_endpoints_lock);
+}
+
+always_inline transport_endpoint_t *
+transport_endpoint_new (void)
+{
+  transport_endpoint_t *tep;
+  pool_get_zero (local_endpoints, tep);
+  return tep;
+}
+
+void
+transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port)
+{
+  u32 tepi;
+  transport_endpoint_t *tep;
+
+  /* Cleanup local endpoint if this was an active connect */
+  tepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
+				    clib_net_to_host_u16 (port));
+  if (tepi != ENDPOINT_INVALID_INDEX)
+    {
+      tep = pool_elt_at_index (local_endpoints, tepi);
+      transport_endpoint_table_del (&local_endpoints_table, proto, tep);
+      transport_endpoint_del (tepi);
+    }
+}
+
+static void
+transport_endpoint_mark_used (u8 proto, ip46_address_t * ip, u16 port)
+{
+  transport_endpoint_t *tep;
+  clib_spinlock_lock_if_init (&local_endpoints_lock);
+  tep = transport_endpoint_new ();
+  clib_memcpy_fast (&tep->ip, ip, sizeof (*ip));
+  tep->port = port;
+  transport_endpoint_table_add (&local_endpoints_table, proto, tep,
+				tep - local_endpoints);
+  clib_spinlock_unlock_if_init (&local_endpoints_lock);
+}
+
+/**
+ * Allocate local port and add if successful add entry to local endpoint
+ * table to mark the pair as used.
+ */
+int
+transport_alloc_local_port (u8 proto, ip46_address_t * ip)
+{
+  u16 min = 1024, max = 65535;	/* XXX configurable ? */
+  int tries, limit;
+  u32 tei;
+
+  limit = max - min;
+
+  /* Only support active opens from thread 0 */
+  ASSERT (vlib_get_thread_index () == 0);
+
+  /* Search for first free slot */
+  for (tries = 0; tries < limit; tries++)
+    {
+      u16 port = 0;
+
+      /* Find a port in the specified range */
+      while (1)
+	{
+	  port = random_u32 (&port_allocator_seed) & PORT_MASK;
+	  if (PREDICT_TRUE (port >= min && port < max))
+	    break;
+	}
+
+      /* Look it up. If not found, we're done */
+      tei = transport_endpoint_lookup (&local_endpoints_table, proto, ip,
+				       port);
+      if (tei == ENDPOINT_INVALID_INDEX)
+	{
+	  transport_endpoint_mark_used (proto, ip, port);
+	  return port;
+	}
+    }
+  return -1;
+}
+
+static clib_error_t *
+transport_get_interface_ip (u32 sw_if_index, u8 is_ip4, ip46_address_t * addr)
+{
+  if (is_ip4)
+    {
+      ip4_address_t *ip4;
+      ip4 = ip_interface_get_first_ip (sw_if_index, 1);
+      if (!ip4)
+	return clib_error_return (0, "no routable ip4 address on %U",
+				  format_vnet_sw_if_index_name,
+				  vnet_get_main (), sw_if_index);
+      addr->ip4.as_u32 = ip4->as_u32;
+    }
+  else
+    {
+      ip6_address_t *ip6;
+      ip6 = ip_interface_get_first_ip (sw_if_index, 0);
+      if (ip6 == 0)
+	return clib_error_return (0, "no routable ip6 addresses on %U",
+				  format_vnet_sw_if_index_name,
+				  vnet_get_main (), sw_if_index);
+      clib_memcpy_fast (&addr->ip6, ip6, sizeof (*ip6));
+    }
+  return 0;
+}
+
+static clib_error_t *
+transport_find_local_ip_for_remote (u32 sw_if_index,
+				    transport_endpoint_t * rmt,
+				    ip46_address_t * lcl_addr)
+{
+  fib_node_index_t fei;
+  fib_prefix_t prefix;
+
+  if (sw_if_index == ENDPOINT_INVALID_INDEX)
+    {
+      /* Find a FIB path to the destination */
+      clib_memcpy_fast (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip));
+      prefix.fp_proto = rmt->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
+      prefix.fp_len = rmt->is_ip4 ? 32 : 128;
+
+      ASSERT (rmt->fib_index != ENDPOINT_INVALID_INDEX);
+      fei = fib_table_lookup (rmt->fib_index, &prefix);
+
+      /* Couldn't find route to destination. Bail out. */
+      if (fei == FIB_NODE_INDEX_INVALID)
+	return clib_error_return (0, "no route to %U", format_ip46_address,
+				  &rmt->ip, (rmt->is_ip4 == 0) + 1);
+
+      sw_if_index = fib_entry_get_resolving_interface (fei);
+      if (sw_if_index == ENDPOINT_INVALID_INDEX)
+	return clib_error_return (0, "no resolving interface for %U",
+				  format_ip46_address, &rmt->ip,
+				  (rmt->is_ip4 == 0) + 1);
+    }
+
+  clib_memset (lcl_addr, 0, sizeof (*lcl_addr));
+  return transport_get_interface_ip (sw_if_index, rmt->is_ip4, lcl_addr);
+}
+
+int
+transport_alloc_local_endpoint (u8 proto, transport_endpoint_cfg_t * rmt_cfg,
+				ip46_address_t * lcl_addr, u16 * lcl_port)
+{
+  transport_endpoint_t *rmt = (transport_endpoint_t *) rmt_cfg;
+  clib_error_t *error;
+  int port;
+  u32 tei;
+
+  /*
+   * Find the local address
+   */
+  if (ip_is_zero (&rmt_cfg->peer.ip, rmt_cfg->peer.is_ip4))
+    {
+      error = transport_find_local_ip_for_remote (rmt_cfg->peer.sw_if_index,
+						  rmt, lcl_addr);
+      if (error)
+	{
+	  clib_error_report (error);
+	  return -1;
+	}
+    }
+  else
+    {
+      /* Assume session layer vetted this address */
+      clib_memcpy_fast (lcl_addr, &rmt_cfg->peer.ip,
+			sizeof (rmt_cfg->peer.ip));
+    }
+
+  /*
+   * Allocate source port
+   */
+  if (rmt_cfg->peer.port == 0)
+    {
+      port = transport_alloc_local_port (proto, lcl_addr);
+      if (port < 1)
+	{
+	  clib_warning ("Failed to allocate src port");
+	  return -1;
+	}
+      *lcl_port = port;
+    }
+  else
+    {
+      port = clib_net_to_host_u16 (rmt_cfg->peer.port);
+      tei = transport_endpoint_lookup (&local_endpoints_table, proto,
+				       lcl_addr, port);
+      if (tei != ENDPOINT_INVALID_INDEX)
+	return -1;
+
+      transport_endpoint_mark_used (proto, lcl_addr, port);
+      *lcl_port = port;
+    }
+
+  return 0;
+}
+
+#define SPACER_CPU_TICKS_PER_PERIOD_SHIFT 10
+#define SPACER_CPU_TICKS_PER_PERIOD (1 << SPACER_CPU_TICKS_PER_PERIOD_SHIFT)
+
+u8 *
+format_transport_pacer (u8 * s, va_list * args)
+{
+  spacer_t *pacer = va_arg (*args, spacer_t *);
+
+  s = format (s, "bucket %u max_burst %u tokens/period %.3f last_update %x",
+	      pacer->bucket, pacer->max_burst_size, pacer->tokens_per_period,
+	      pacer->last_update);
+  return s;
+}
+
+static inline u32
+spacer_max_burst (spacer_t * pacer, u64 norm_time_now)
+{
+  u64 n_periods = norm_time_now - pacer->last_update;
+  u64 inc;
+
+  if (n_periods > 0 && (inc = n_periods * pacer->tokens_per_period) > 10)
+    {
+      pacer->last_update = norm_time_now;
+      pacer->bucket += inc;
+    }
+
+  return clib_min (pacer->bucket, pacer->max_burst_size);
+}
+
+static inline void
+spacer_update_bucket (spacer_t * pacer, u32 bytes)
+{
+  ASSERT (pacer->bucket >= bytes);
+  pacer->bucket -= bytes;
+}
+
+static inline void
+spacer_update_max_burst_size (spacer_t * pacer, u32 max_burst_bytes)
+{
+  pacer->max_burst_size = clib_max (max_burst_bytes,
+				    TRANSPORT_PACER_MIN_BURST);
+}
+
+static inline void
+spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec)
+{
+  ASSERT (rate_bytes_per_sec != 0);
+  pacer->tokens_per_period = rate_bytes_per_sec / transport_pacer_period;
+}
+
+void
+transport_connection_tx_pacer_reset (transport_connection_t * tc,
+				     u32 rate_bytes_per_sec,
+				     u32 start_bucket, u64 time_now)
+{
+  spacer_t *pacer = &tc->pacer;
+  f64 dispatch_period;
+  u32 burst_size;
+
+  dispatch_period = transport_dispatch_period (tc->thread_index);
+  burst_size = rate_bytes_per_sec * dispatch_period;
+  spacer_update_max_burst_size (&tc->pacer, burst_size);
+  spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec);
+  pacer->last_update = time_now >> SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
+  pacer->bucket = start_bucket;
+}
+
+void
+transport_connection_tx_pacer_init (transport_connection_t * tc,
+				    u32 rate_bytes_per_sec,
+				    u32 initial_bucket)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
+  transport_connection_tx_pacer_reset (tc, rate_bytes_per_sec,
+				       initial_bucket,
+				       vm->clib_time.last_cpu_time);
+}
+
+void
+transport_connection_tx_pacer_update (transport_connection_t * tc,
+				      u64 bytes_per_sec)
+{
+  f64 dispatch_period = transport_dispatch_period (tc->thread_index);
+  u32 burst_size = 1.1 * bytes_per_sec * dispatch_period;
+  spacer_set_pace_rate (&tc->pacer, bytes_per_sec);
+  spacer_update_max_burst_size (&tc->pacer, burst_size);
+}
+
+u32
+transport_connection_tx_pacer_burst (transport_connection_t * tc,
+				     u64 time_now)
+{
+  time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
+  return spacer_max_burst (&tc->pacer, time_now);
+}
+
+u32
+transport_connection_snd_space (transport_connection_t * tc, u64 time_now,
+				u16 mss)
+{
+  u32 snd_space, max_paced_burst;
+
+  snd_space = tp_vfts[tc->proto].send_space (tc);
+  if (transport_connection_is_tx_paced (tc))
+    {
+      time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
+      max_paced_burst = spacer_max_burst (&tc->pacer, time_now);
+      max_paced_burst = (max_paced_burst < mss) ? 0 : max_paced_burst;
+      snd_space = clib_min (snd_space, max_paced_burst);
+      snd_space = snd_space - snd_space % mss;
+    }
+  return snd_space;
+}
+
+void
+transport_connection_update_tx_stats (transport_connection_t * tc, u32 bytes)
+{
+  tc->stats.tx_bytes += bytes;
+  if (transport_connection_is_tx_paced (tc))
+    spacer_update_bucket (&tc->pacer, bytes);
+}
+
+void
+transport_connection_tx_pacer_update_bytes (transport_connection_t * tc,
+					    u32 bytes)
+{
+  spacer_update_bucket (&tc->pacer, bytes);
+}
+
+void
+transport_init_tx_pacers_period (void)
+{
+  f64 cpu_freq = os_cpu_clock_frequency ();
+  transport_pacer_period = cpu_freq / SPACER_CPU_TICKS_PER_PERIOD;
+}
+
+void
+transport_update_time (f64 time_now, u8 thread_index)
+{
+  transport_proto_vft_t *vft;
+  vec_foreach (vft, tp_vfts)
+  {
+    if (vft->update_time)
+      (vft->update_time) (time_now, thread_index);
+  }
+}
+
+void
+transport_enable_disable (vlib_main_t * vm, u8 is_en)
+{
+  transport_proto_vft_t *vft;
+  vec_foreach (vft, tp_vfts)
+  {
+    if (vft->enable)
+      (vft->enable) (vm, is_en);
+  }
+}
+
+void
+transport_init (void)
+{
+  vlib_thread_main_t *vtm = vlib_get_thread_main ();
+  session_manager_main_t *smm = vnet_get_session_manager_main ();
+  u32 num_threads;
+
+  if (smm->local_endpoints_table_buckets == 0)
+    smm->local_endpoints_table_buckets = 250000;
+  if (smm->local_endpoints_table_memory == 0)
+    smm->local_endpoints_table_memory = 512 << 20;
 
+  /* Initialize [port-allocator] random number seed */
+  port_allocator_seed = (u32) clib_cpu_time_now ();
 
+  clib_bihash_init_24_8 (&local_endpoints_table, "local endpoints table",
+			 smm->local_endpoints_table_buckets,
+			 smm->local_endpoints_table_memory);
+  num_threads = 1 /* main thread */  + vtm->n_threads;
+  if (num_threads > 1)
+    clib_spinlock_init (&local_endpoints_lock);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */