diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index 7fcf6e2b04b..18be81308d8 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -283,6 +283,8 @@ grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq,
   call->send_deadline = send_deadline;
   grpc_channel_internal_ref(channel);
   call->metadata_context = grpc_channel_get_metadata_context(channel);
+  grpc_sopb_init(&call->send_ops);
+  grpc_sopb_init(&call->recv_ops);
   /* one ref is dropped in response to destroy, the other in
      stream_closed */
   gpr_ref_init(&call->internal_refcount, 2);
@@ -330,6 +332,8 @@ static void destroy_call(void *call, int ignored_success) {
     destroy_legacy_state(c->legacy_state);
   }
   grpc_bbq_destroy(&c->incoming_queue);
+  grpc_sopb_destroy(&c->send_ops);
+  grpc_sopb_destroy(&c->recv_ops);
   gpr_free(c);
 }
 
@@ -1091,41 +1095,9 @@ static void recv_metadata(grpc_call *call, grpc_metadata_batch *md) {
   grpc_mdctx_unlock(mdctx);
 }
 
-#if 0
-void grpc_call_read_closed(grpc_call_element *elem) {
-  set_read_state(CALL_FROM_TOP_ELEM(elem), READ_STATE_READ_CLOSED);
-}
-
-void grpc_call_stream_closed(grpc_call_element *elem) {
-  grpc_call *call = CALL_FROM_TOP_ELEM(elem);
-  set_read_state(call, READ_STATE_STREAM_CLOSED);
-  grpc_call_internal_unref(call, 0);
-}
-
-void grpc_call_recv_message(grpc_call_element *elem,
-                            grpc_byte_buffer *byte_buffer) {
-  grpc_call *call = CALL_FROM_TOP_ELEM(elem);
-  lock(call);
-  grpc_bbq_push(&call->incoming_queue, byte_buffer);
-  finish_read_ops(call);
-  unlock(call);
-}
-
-void grpc_call_recv_synthetic_status(grpc_call_element *elem,
-                                     grpc_status_code status,
-                                     const char *message) {
-  grpc_call *call = CALL_FROM_TOP_ELEM(elem);
-  lock(call);
-  set_status_code(call, STATUS_FROM_CORE, status);
-  set_status_details(call, STATUS_FROM_CORE,
-                     grpc_mdstr_from_string(call->metadata_context, message));
-  unlock(call);
-}
-
 grpc_call_stack *grpc_call_get_call_stack(grpc_call *call) {
   return CALL_STACK_FROM_CALL(call);
 }
-#endif
 
 /*
  * BATCH API IMPLEMENTATION
diff --git a/src/core/surface/channel.c b/src/core/surface/channel.c
index f1d71afaf27..de2f354c782 100644
--- a/src/core/surface/channel.c
+++ b/src/core/surface/channel.c
@@ -242,3 +242,7 @@ grpc_mdstr *grpc_channel_get_status_string(grpc_channel *channel) {
 grpc_mdstr *grpc_channel_get_message_string(grpc_channel *channel) {
   return channel->grpc_message_string;
 }
+
+gpr_uint32 grpc_channel_get_max_message_length(grpc_channel *channel) {
+  return channel->max_message_length;
+}
\ No newline at end of file
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index fed30887896..9c2af560c13 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -1503,8 +1503,6 @@ static int is_window_update_legal(gpr_int64 window_update, gpr_int64 window) {
   return window + window_update < MAX_WINDOW;
 }
 
-static void free_md(void *p, grpc_op_error result) { gpr_free(p); }
-
 static void add_metadata_batch(transport *t, stream *s) {
   grpc_metadata_batch b;
   size_t i;
@@ -1522,8 +1520,7 @@ static void add_metadata_batch(transport *t, stream *s) {
   s->incoming_metadata[s->incoming_metadata_count - 1].next = NULL;
 
   grpc_sopb_add_metadata(&s->parser.incoming_sopb, b);
-  grpc_sopb_add_flow_ctl_cb(&s->parser.incoming_sopb, free_md,
-                            s->incoming_metadata);
+  /* TODO(ctiller): don't leak incoming_metadata */
 
   /* reset */
   s->incoming_deadline = gpr_inf_future;
diff --git a/src/core/transport/stream_op.c b/src/core/transport/stream_op.c
index 882c078d512..ea22b0e1c82 100644
--- a/src/core/transport/stream_op.c
+++ b/src/core/transport/stream_op.c
@@ -81,9 +81,6 @@ void grpc_stream_ops_unref_owned_objects(grpc_stream_op *ops, size_t nops) {
       case GRPC_OP_METADATA:
         grpc_metadata_batch_destroy(&ops[i].data.metadata);
         break;
-      case GRPC_OP_FLOW_CTL_CB:
-        ops[i].data.flow_ctl_cb.cb(ops[i].data.flow_ctl_cb.arg, GRPC_OP_ERROR);
-        break;
       case GRPC_NO_OP:
       case GRPC_OP_BEGIN_MESSAGE:
         break;
@@ -119,6 +116,7 @@ static grpc_stream_op *add(grpc_stream_op_buffer *sopb) {
 
   assert_contained_metadata_ok(sopb->ops, sopb->nops);
 
+  GPR_ASSERT(sopb->nops <= sopb->capacity);
   if (sopb->nops == sopb->capacity) {
     expandto(sopb, GROW(sopb->capacity));
   }
@@ -158,16 +156,6 @@ void grpc_sopb_add_slice(grpc_stream_op_buffer *sopb, gpr_slice slice) {
   assert_contained_metadata_ok(sopb->ops, sopb->nops);
 }
 
-void grpc_sopb_add_flow_ctl_cb(grpc_stream_op_buffer *sopb,
-                               void (*cb)(void *arg, grpc_op_error error),
-                               void *arg) {
-  grpc_stream_op *op = add(sopb);
-  op->type = GRPC_OP_FLOW_CTL_CB;
-  op->data.flow_ctl_cb.cb = cb;
-  op->data.flow_ctl_cb.arg = arg;
-  assert_contained_metadata_ok(sopb->ops, sopb->nops);
-}
-
 void grpc_sopb_append(grpc_stream_op_buffer *sopb, grpc_stream_op *ops,
                       size_t nops) {
   size_t orig_nops = sopb->nops;
diff --git a/src/core/transport/stream_op.h b/src/core/transport/stream_op.h
index c3901bf6088..f5de64d583a 100644
--- a/src/core/transport/stream_op.h
+++ b/src/core/transport/stream_op.h
@@ -154,12 +154,10 @@ void grpc_sopb_add_begin_message(grpc_stream_op_buffer *sopb, gpr_uint32 length,
 void grpc_sopb_add_metadata(grpc_stream_op_buffer *sopb, grpc_metadata_batch metadata);
 /* Append a GRPC_SLICE to a buffer - does not ref/unref the slice */
 void grpc_sopb_add_slice(grpc_stream_op_buffer *sopb, gpr_slice slice);
-/* Append a GRPC_OP_FLOW_CTL_CB to a buffer */
-void grpc_sopb_add_flow_ctl_cb(grpc_stream_op_buffer *sopb,
-                               void (*cb)(void *arg, grpc_op_error error),
-                               void *arg);
 /* Append a buffer to a buffer - does not ref/unref any internal objects */
 void grpc_sopb_append(grpc_stream_op_buffer *sopb, grpc_stream_op *ops,
                       size_t nops);
 
+char *grpc_sopb_string(grpc_stream_op_buffer *sopb);
+
 #endif  /* GRPC_INTERNAL_CORE_TRANSPORT_STREAM_OP_H */
diff --git a/src/core/transport/transport.c b/src/core/transport/transport.c
index ef0020dc58b..35195348e70 100644
--- a/src/core/transport/transport.c
+++ b/src/core/transport/transport.c
@@ -56,14 +56,9 @@ int grpc_transport_init_stream(grpc_transport *transport, grpc_stream *stream,
   return transport->vtable->init_stream(transport, stream, server_data);
 }
 
-void grpc_transport_send_batch(grpc_transport *transport, grpc_stream *stream,
-                               grpc_stream_op *ops, size_t nops, int is_last) {
-  transport->vtable->send_batch(transport, stream, ops, nops, is_last);
-}
-
-void grpc_transport_set_allow_window_updates(grpc_transport *transport,
-                                             grpc_stream *stream, int allow) {
-  transport->vtable->set_allow_window_updates(transport, stream, allow);
+void grpc_transport_perform_op(grpc_transport *transport, grpc_stream *stream,
+                               grpc_transport_op *op) {
+  transport->vtable->perform_op(transport, stream, op);
 }
 
 void grpc_transport_add_to_pollset(grpc_transport *transport,
@@ -76,11 +71,6 @@ void grpc_transport_destroy_stream(grpc_transport *transport,
   transport->vtable->destroy_stream(transport, stream);
 }
 
-void grpc_transport_abort_stream(grpc_transport *transport, grpc_stream *stream,
-                                 grpc_status_code status) {
-  transport->vtable->abort_stream(transport, stream, status);
-}
-
 void grpc_transport_ping(grpc_transport *transport, void (*cb)(void *user_data),
                          void *user_data) {
   transport->vtable->ping(transport, cb, user_data);
diff --git a/src/core/transport/transport_op_string.c b/src/core/transport/transport_op_string.c
index 5f7e1be2682..e886690234f 100644
--- a/src/core/transport/transport_op_string.c
+++ b/src/core/transport/transport_op_string.c
@@ -66,65 +66,76 @@ static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
   }
 }
 
-char *grpc_call_op_string(grpc_call_op *op) {
+char *grpc_sopb_string(grpc_stream_op_buffer *sopb) {
+  char *out;
+  char *tmp;
+  size_t i;
+  gpr_strvec b;
+  gpr_strvec_init(&b);
+
+  for (i = 0; i < sopb->nops; i++) {
+    grpc_stream_op *op = &sopb->ops[i];
+    if (i) gpr_strvec_add(&b, gpr_strdup(", "));
+    switch (op->type) {
+      case GRPC_NO_OP:
+        gpr_strvec_add(&b, gpr_strdup("NO_OP"));
+        break;
+      case GRPC_OP_BEGIN_MESSAGE:
+        gpr_asprintf(&tmp, "BEGIN_MESSAGE:%d", op->data.begin_message.length);
+        gpr_strvec_add(&b, tmp);
+        break;
+      case GRPC_OP_SLICE:
+        gpr_asprintf(&tmp, "SLICE:%d", GPR_SLICE_LENGTH(op->data.slice));
+        break;
+      case GRPC_OP_METADATA:
+        put_metadata_list(&b, op->data.metadata);
+        break;
+    }
+  }
+
+  out = gpr_strvec_flatten(&b, NULL);
+  gpr_strvec_destroy(&b);
+
+  return out;
+}
+
+char *grpc_transport_op_string(grpc_transport_op *op) {
   char *tmp;
   char *out;
+  int first = 1;
 
   gpr_strvec b;
   gpr_strvec_init(&b);
 
-  switch (op->dir) {
-    case GRPC_CALL_DOWN:
-      gpr_strvec_add(&b, gpr_strdup(">"));
-      break;
-    case GRPC_CALL_UP:
-      gpr_strvec_add(&b, gpr_strdup("<"));
-      break;
+  if (op->send_ops) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("SEND"));
+    if (op->is_last_send) {
+      gpr_strvec_add(&b, gpr_strdup("_LAST"));
+    }
+    gpr_strvec_add(&b, gpr_strdup("["));
+    gpr_strvec_add(&b, grpc_sopb_string(op->send_ops));
+    gpr_strvec_add(&b, gpr_strdup("]"));
   }
-  switch (op->type) {
-    case GRPC_SEND_METADATA:
-      gpr_strvec_add(&b, gpr_strdup("SEND_METADATA"));
-      put_metadata_list(&b, op->data.metadata);
-      break;
-    case GRPC_SEND_MESSAGE:
-      gpr_strvec_add(&b, gpr_strdup("SEND_MESSAGE"));
-      break;
-    case GRPC_SEND_PREFORMATTED_MESSAGE:
-      gpr_strvec_add(&b, gpr_strdup("SEND_PREFORMATTED_MESSAGE"));
-      break;
-    case GRPC_SEND_FINISH:
-      gpr_strvec_add(&b, gpr_strdup("SEND_FINISH"));
-      break;
-    case GRPC_REQUEST_DATA:
-      gpr_strvec_add(&b, gpr_strdup("REQUEST_DATA"));
-      break;
-    case GRPC_RECV_METADATA:
-      gpr_strvec_add(&b, gpr_strdup("RECV_METADATA"));
-      put_metadata_list(&b, op->data.metadata);
-      break;
-    case GRPC_RECV_MESSAGE:
-      gpr_strvec_add(&b, gpr_strdup("RECV_MESSAGE"));
-      break;
-    case GRPC_RECV_HALF_CLOSE:
-      gpr_strvec_add(&b, gpr_strdup("RECV_HALF_CLOSE"));
-      break;
-    case GRPC_RECV_FINISH:
-      gpr_strvec_add(&b, gpr_strdup("RECV_FINISH"));
-      break;
-    case GRPC_RECV_SYNTHETIC_STATUS:
-      gpr_asprintf(&tmp, "RECV_SYNTHETIC_STATUS status=%d message='%s'",
-                   op->data.synthetic_status.status,
-                   op->data.synthetic_status.message);
-      gpr_strvec_add(&b, tmp);
-      break;
-    case GRPC_CANCEL_OP:
-      gpr_strvec_add(&b, gpr_strdup("CANCEL_OP"));
-      break;
+
+  if (op->recv_ops) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("RECV"));
   }
-  gpr_asprintf(&tmp, " flags=0x%08x", op->flags);
-  gpr_strvec_add(&b, tmp);
+
   if (op->bind_pollset) {
-    gpr_strvec_add(&b, gpr_strdup("bind_pollset"));
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("BIND"));
+  }
+
+  if (op->cancel_with_status != GRPC_STATUS_OK) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_asprintf(&tmp, "CANCEL:%d", op->cancel_with_status);
+    gpr_strvec_add(&b, tmp);
   }
 
   out = gpr_strvec_flatten(&b, NULL);
@@ -134,8 +145,8 @@ char *grpc_call_op_string(grpc_call_op *op) {
 }
 
 void grpc_call_log_op(char *file, int line, gpr_log_severity severity,
-                      grpc_call_element *elem, grpc_call_op *op) {
-  char *str = grpc_call_op_string(op);
+                      grpc_call_element *elem, grpc_transport_op *op) {
+  char *str = grpc_transport_op_string(op);
   gpr_log(file, line, severity, "OP[%s:%p]: %s", elem->filter->name, elem, str);
   gpr_free(str);
 }
diff --git a/test/core/end2end/fixtures/chttp2_socket_pair.c b/test/core/end2end/fixtures/chttp2_socket_pair.c
index 1225f7db0c2..acc0a69708a 100644
--- a/test/core/end2end/fixtures/chttp2_socket_pair.c
+++ b/test/core/end2end/fixtures/chttp2_socket_pair.c
@@ -37,7 +37,6 @@
 
 #include "src/core/channel/client_channel.h"
 #include "src/core/channel/connected_channel.h"
-#include "src/core/channel/http_filter.h"
 #include "src/core/channel/http_client_filter.h"
 #include "src/core/channel/http_server_filter.h"
 #include "src/core/iomgr/endpoint_pair.h"
@@ -60,8 +59,7 @@
 static grpc_transport_setup_result server_setup_transport(
     void *ts, grpc_transport *transport, grpc_mdctx *mdctx) {
   grpc_end2end_test_fixture *f = ts;
-  static grpc_channel_filter const *extra_filters[] = {&grpc_http_server_filter,
-                                                       &grpc_http_filter};
+  static grpc_channel_filter const *extra_filters[] = {&grpc_http_server_filter};
   return grpc_server_setup_transport(f->server, transport, extra_filters,
                                      GPR_ARRAY_SIZE(extra_filters), mdctx);
 }
@@ -76,7 +74,7 @@ static grpc_transport_setup_result client_setup_transport(
   sp_client_setup *cs = ts;
 
   const grpc_channel_filter *filters[] = {
-      &grpc_client_surface_filter, &grpc_http_client_filter, &grpc_http_filter,
+      &grpc_client_surface_filter, &grpc_http_client_filter,
       &grpc_connected_channel_filter};
   size_t nfilters = sizeof(filters) / sizeof(*filters);
   grpc_channel *channel = grpc_channel_create_from_filters(