Revert "Fathom tcp changes"

1 files changed, 0 insertions, 96 deletions

diff --git a/src/core/lib/iomgr/buffer_list.h b/src/core/lib/iomgr/buffer_list.h
deleted file mode 100644
index cbbf50a657..0000000000
--- a/src/core/lib/iomgr/buffer_list.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H
-#define GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H
-
-#include <grpc/support/port_platform.h>
-
-#include "src/core/lib/iomgr/port.h"
-
-#include <grpc/support/time.h>
-
-#include "src/core/lib/gprpp/memory.h"
-#include "src/core/lib/iomgr/error.h"
-#include "src/core/lib/iomgr/internal_errqueue.h"
-
-namespace grpc_core {
-struct Timestamps {
-  /* TODO(yashykt): This would also need to store OPTSTAT once support is added
-   */
-  gpr_timespec sendmsg_time;
-  gpr_timespec scheduled_time;
-  gpr_timespec sent_time;
-  gpr_timespec acked_time;
-};
-
-/** TracedBuffer is a class to keep track of timestamps for a specific buffer in
- * the TCP layer. We are only tracking timestamps for Linux kernels and hence
- * this class would only be used by Linux platforms. For all other platforms,
- * TracedBuffer would be an empty class.
- *
- * The timestamps collected are according to grpc_core::Timestamps declared
- * above.
- *
- * A TracedBuffer list is kept track of using the head element of the list. If
- * the head element of the list is nullptr, then the list is empty.
- */
-#ifdef GRPC_LINUX_ERRQUEUE
-class TracedBuffer {
- public:
-  /** Add a new entry in the TracedBuffer list pointed to by head. Also saves
-   * sendmsg_time with the current timestamp. */
-  static void AddNewEntry(grpc_core::TracedBuffer** head, uint32_t seq_no,
-                          void* arg);
-
-  /** Processes a received timestamp based on sock_extended_err and
-   * scm_timestamping structures. It will invoke the timestamps callback if the
-   * timestamp type is SCM_TSTAMP_ACK. */
-  static void ProcessTimestamp(grpc_core::TracedBuffer** head,
-                               struct sock_extended_err* serr,
-                               struct scm_timestamping* tss);
-
-  /** Cleans the list by calling the callback for each traced buffer in the list
-   * with timestamps that it has. */
-  static void Shutdown(grpc_core::TracedBuffer** head,
-                       grpc_error* shutdown_err);
-
- private:
-  GPRC_ALLOW_CLASS_TO_USE_NON_PUBLIC_NEW
-
-  TracedBuffer(int seq_no, void* arg)
-      : seq_no_(seq_no), arg_(arg), next_(nullptr) {}
-
-  uint32_t seq_no_; /* The sequence number for the last byte in the buffer */
-  void* arg_;       /* The arg to pass to timestamps_callback */
-  grpc_core::Timestamps ts_; /* The timestamps corresponding to this buffer */
-  grpc_core::TracedBuffer* next_; /* The next TracedBuffer in the list */
-};
-#else  /* GRPC_LINUX_ERRQUEUE */
-class TracedBuffer {};
-#endif /* GRPC_LINUX_ERRQUEUE */
-
-/** Sets the callback function to call when timestamps for a write are
- *  collected. The callback does not own a reference to error. */
-void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*,
-                                                       grpc_core::Timestamps*,
-                                                       grpc_error* error));
-
-}; /* namespace grpc_core */
-
-#endif /* GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H */