vcl: add support for reconnect

[vpp.git] / src / vcl / vcl_private.c

diff --git a/src/vcl/vcl_private.c b/src/vcl/vcl_private.c
index 3cbf025..b6ef815 100644 (file)
--- a/src/vcl/vcl_private.c
+++ b/src/vcl/vcl_private.c
@@ -38,6 +38,25 @@ vcl_mq_evt_conn_get (vcl_worker_t * wrk, u32 mq_conn_idx)
   return pool_elt_at_index (wrk->mq_evt_conns, mq_conn_idx);
 }
 
+/* Add unix socket to epoll.
+ * Used only to get a notification on socket close
+ * We can't use eventfd because we don't get notifications on that fds
+ */
+static int
+vcl_mq_epoll_add_api_sock (vcl_worker_t *wrk)
+{
+  clib_socket_t *cs = &wrk->app_api_sock;
+  struct epoll_event e = { 0 };
+  int rv;
+
+  e.data.u32 = ~0;
+  rv = epoll_ctl (wrk->mqs_epfd, EPOLL_CTL_ADD, cs->fd, &e);
+  if (rv != EEXIST && rv < 0)
+    return -1;
+
+  return 0;
+}
+
 int
 vcl_mq_epoll_add_evfd (vcl_worker_t * wrk, svm_msg_q_t * mq)
 {
@@ -64,6 +83,12 @@ vcl_mq_epoll_add_evfd (vcl_worker_t * wrk, svm_msg_q_t * mq)
       return -1;
     }
 
+  if (vcl_mq_epoll_add_api_sock (wrk))
+    {
+      VDBG (0, "failed to add mq socket to mq epoll fd");
+      return -1;
+    }
+
   return mqc_index;
 }
 
@@ -158,6 +183,33 @@ vcl_worker_cleanup_cb (void *arg)
   VDBG (0, "cleaned up worker %u", wrk_index);
 }
 
+void
+vcl_worker_detach_sessions (vcl_worker_t *wrk)
+{
+  session_event_t *e;
+  vcl_session_t *s;
+
+  close (wrk->app_api_sock.fd);
+  pool_foreach (s, wrk->sessions)
+    {
+      if (s->session_state == VCL_STATE_LISTEN)
+       {
+         s->session_state = VCL_STATE_LISTEN_NO_MQ;
+         continue;
+       }
+      if (s->flags & VCL_SESSION_F_IS_VEP)
+       continue;
+
+      s->session_state = VCL_STATE_DETACHED;
+      vec_add2 (wrk->unhandled_evts_vector, e, 1);
+      e->event_type = SESSION_CTRL_EVT_DISCONNECTED;
+      e->session_index = s->session_index;
+      e->postponed = 1;
+    }
+
+  vcl_segment_detach_all ();
+}
+
 vcl_worker_t *
 vcl_worker_alloc_and_init ()
 {
@@ -410,6 +462,24 @@ vcl_segment_detach (u64 segment_handle)
   VDBG (0, "detached segment %u handle %u", segment_index, segment_handle);
 }
 
+void
+vcl_segment_detach_all ()
+{
+  u64 *segs = 0, *seg, key;
+  u32 val;
+
+  clib_rwlock_reader_lock (&vcm->segment_table_lock);
+
+  hash_foreach (key, val, vcm->segment_table, ({ vec_add1 (segs, key); }));
+
+  clib_rwlock_reader_unlock (&vcm->segment_table_lock);
+
+  vec_foreach (seg, segs)
+    vcl_segment_detach (seg[0]);
+
+  vec_free (segs);
+}
+
 int
 vcl_segment_attach_session (uword segment_handle, uword rxf_offset,
                            uword txf_offset, uword mq_offset, u32 mq_index,
@@ -594,6 +664,126 @@ vcl_session_share_fifos (vcl_session_t *s, svm_fifo_t *rxf, svm_fifo_t *txf)
   return 0;
 }
 
+const char *
+vcl_session_state_str (vcl_session_state_t state)
+{
+  char *st;
+
+  switch (state)
+    {
+    case VCL_STATE_CLOSED:
+      st = "STATE_CLOSED";
+      break;
+    case VCL_STATE_LISTEN:
+      st = "STATE_LISTEN";
+      break;
+    case VCL_STATE_READY:
+      st = "STATE_READY";
+      break;
+    case VCL_STATE_VPP_CLOSING:
+      st = "STATE_VPP_CLOSING";
+      break;
+    case VCL_STATE_DISCONNECT:
+      st = "STATE_DISCONNECT";
+      break;
+    case VCL_STATE_DETACHED:
+      st = "STATE_DETACHED";
+      break;
+    case VCL_STATE_UPDATED:
+      st = "STATE_UPDATED";
+      break;
+    case VCL_STATE_LISTEN_NO_MQ:
+      st = "STATE_LISTEN_NO_MQ";
+      break;
+    default:
+      st = "UNKNOWN_STATE";
+      break;
+    }
+
+  return st;
+}
+
+u8 *
+vcl_format_ip4_address (u8 *s, va_list *args)
+{
+  u8 *a = va_arg (*args, u8 *);
+  return format (s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
+}
+
+u8 *
+vcl_format_ip6_address (u8 *s, va_list *args)
+{
+  ip6_address_t *a = va_arg (*args, ip6_address_t *);
+  u32 i, i_max_n_zero, max_n_zeros, i_first_zero, n_zeros, last_double_colon;
+
+  i_max_n_zero = ARRAY_LEN (a->as_u16);
+  max_n_zeros = 0;
+  i_first_zero = i_max_n_zero;
+  n_zeros = 0;
+  for (i = 0; i < ARRAY_LEN (a->as_u16); i++)
+    {
+      u32 is_zero = a->as_u16[i] == 0;
+      if (is_zero && i_first_zero >= ARRAY_LEN (a->as_u16))
+       {
+         i_first_zero = i;
+         n_zeros = 0;
+       }
+      n_zeros += is_zero;
+      if ((!is_zero && n_zeros > max_n_zeros) ||
+         (i + 1 >= ARRAY_LEN (a->as_u16) && n_zeros > max_n_zeros))
+       {
+         i_max_n_zero = i_first_zero;
+         max_n_zeros = n_zeros;
+         i_first_zero = ARRAY_LEN (a->as_u16);
+         n_zeros = 0;
+       }
+    }
+
+  last_double_colon = 0;
+  for (i = 0; i < ARRAY_LEN (a->as_u16); i++)
+    {
+      if (i == i_max_n_zero && max_n_zeros > 1)
+       {
+         s = format (s, "::");
+         i += max_n_zeros - 1;
+         last_double_colon = 1;
+       }
+      else
+       {
+         s = format (s, "%s%x", (last_double_colon || i == 0) ? "" : ":",
+                     clib_net_to_host_u16 (a->as_u16[i]));
+         last_double_colon = 0;
+       }
+    }
+
+  return s;
+}
+
+/* Format an IP46 address. */
+u8 *
+vcl_format_ip46_address (u8 *s, va_list *args)
+{
+  ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
+  ip46_type_t type = va_arg (*args, ip46_type_t);
+  int is_ip4 = 1;
+
+  switch (type)
+    {
+    case IP46_TYPE_ANY:
+      is_ip4 = ip46_address_is_ip4 (ip46);
+      break;
+    case IP46_TYPE_IP4:
+      is_ip4 = 1;
+      break;
+    case IP46_TYPE_IP6:
+      is_ip4 = 0;
+      break;
+    }
+
+  return is_ip4 ? format (s, "%U", vcl_format_ip4_address, &ip46->ip4) :
+                 format (s, "%U", vcl_format_ip6_address, &ip46->ip6);
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *