Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 295 insertions, 0 deletions

diff --git a/src/librbd/io/ObjectDispatchSpec.h b/src/librbd/io/ObjectDispatchSpec.h
new file mode 100644
index 000000000..a0d4b49a4
--- /dev/null
+++ b/src/librbd/io/ObjectDispatchSpec.h
@@ -0,0 +1,295 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IO_OBJECT_DISPATCH_SPEC_H
+#define CEPH_LIBRBD_IO_OBJECT_DISPATCH_SPEC_H
+
+#include "include/int_types.h"
+#include "include/buffer.h"
+#include "include/Context.h"
+#include "include/rados/librados.hpp"
+#include "common/zipkin_trace.h"
+#include "librbd/Types.h"
+#include "librbd/io/Types.h"
+#include <boost/variant/variant.hpp>
+
+namespace librbd {
+namespace io {
+
+struct ObjectDispatcherInterface;
+
+struct ObjectDispatchSpec {
+private:
+  // helper to avoid extra heap allocation per object IO
+  struct C_Dispatcher : public Context {
+    ObjectDispatchSpec* object_dispatch_spec;
+    Context* on_finish;
+
+    C_Dispatcher(ObjectDispatchSpec* object_dispatch_spec, Context* on_finish)
+      : object_dispatch_spec(object_dispatch_spec), on_finish(on_finish) {
+    }
+
+    void complete(int r) override;
+    void finish(int r) override;
+  };
+
+public:
+  struct RequestBase {
+    uint64_t object_no;
+
+    RequestBase(uint64_t object_no)
+      : object_no(object_no) {
+    }
+  };
+
+  struct ReadRequest : public RequestBase {
+    ReadExtents* extents;
+    int read_flags;
+    uint64_t* version;
+
+    ReadRequest(uint64_t object_no, ReadExtents* extents, int read_flags,
+                uint64_t* version)
+      : RequestBase(object_no), extents(extents), read_flags(read_flags),
+        version(version) {
+    }
+  };
+
+  struct WriteRequestBase : public RequestBase {
+    uint64_t object_off;
+    uint64_t journal_tid;
+
+    WriteRequestBase(uint64_t object_no, uint64_t object_off,
+                     uint64_t journal_tid)
+      : RequestBase(object_no), object_off(object_off),
+        journal_tid(journal_tid) {
+    }
+  };
+
+  struct DiscardRequest : public WriteRequestBase {
+    uint64_t object_len;
+    int discard_flags;
+
+    DiscardRequest(uint64_t object_no, uint64_t object_off, uint64_t object_len,
+                   int discard_flags, uint64_t journal_tid)
+      : WriteRequestBase(object_no, object_off, journal_tid),
+        object_len(object_len), discard_flags(discard_flags) {
+    }
+  };
+
+  struct WriteRequest : public WriteRequestBase {
+    ceph::bufferlist data;
+    int write_flags;
+    std::optional<uint64_t> assert_version;
+
+    WriteRequest(uint64_t object_no, uint64_t object_off,
+                 ceph::bufferlist&& data, int write_flags,
+                 std::optional<uint64_t> assert_version, uint64_t journal_tid)
+      : WriteRequestBase(object_no, object_off, journal_tid),
+        data(std::move(data)), write_flags(write_flags),
+        assert_version(assert_version) {
+    }
+  };
+
+  struct WriteSameRequest : public WriteRequestBase {
+    uint64_t object_len;
+    LightweightBufferExtents buffer_extents;
+    ceph::bufferlist data;
+
+    WriteSameRequest(uint64_t object_no, uint64_t object_off,
+                     uint64_t object_len,
+                     LightweightBufferExtents&& buffer_extents,
+                     ceph::bufferlist&& data, uint64_t journal_tid)
+    : WriteRequestBase(object_no, object_off, journal_tid),
+      object_len(object_len), buffer_extents(std::move(buffer_extents)),
+      data(std::move(data)) {
+    }
+  };
+
+  struct CompareAndWriteRequest : public WriteRequestBase {
+    ceph::bufferlist cmp_data;
+    ceph::bufferlist data;
+    uint64_t* mismatch_offset;
+
+    CompareAndWriteRequest(uint64_t object_no, uint64_t object_off,
+                           ceph::bufferlist&& cmp_data, ceph::bufferlist&& data,
+                           uint64_t* mismatch_offset,
+                           uint64_t journal_tid)
+      : WriteRequestBase(object_no, object_off, journal_tid),
+        cmp_data(std::move(cmp_data)), data(std::move(data)),
+        mismatch_offset(mismatch_offset) {
+    }
+  };
+
+  struct FlushRequest {
+    FlushSource flush_source;
+    uint64_t journal_tid;
+
+    FlushRequest(FlushSource flush_source, uint64_t journal_tid)
+      : flush_source(flush_source), journal_tid(journal_tid) {
+    }
+  };
+
+  struct ListSnapsRequest : public RequestBase {
+    Extents extents;
+    SnapIds snap_ids;
+    int list_snaps_flags;
+    SnapshotDelta* snapshot_delta;
+
+    ListSnapsRequest(uint64_t object_no, Extents&& extents,
+                     SnapIds&& snap_ids, int list_snaps_flags,
+                     SnapshotDelta* snapshot_delta)
+      : RequestBase(object_no), extents(std::move(extents)),
+        snap_ids(std::move(snap_ids)),list_snaps_flags(list_snaps_flags),
+        snapshot_delta(snapshot_delta) {
+    }
+  };
+
+  typedef boost::variant<ReadRequest,
+                         DiscardRequest,
+                         WriteRequest,
+                         WriteSameRequest,
+                         CompareAndWriteRequest,
+                         FlushRequest,
+                         ListSnapsRequest> Request;
+
+  C_Dispatcher dispatcher_ctx;
+
+  ObjectDispatcherInterface* object_dispatcher;
+  ObjectDispatchLayer dispatch_layer;
+  int object_dispatch_flags = 0;
+  DispatchResult dispatch_result = DISPATCH_RESULT_INVALID;
+
+  Request request;
+  IOContext io_context;
+  int op_flags;
+  ZTracer::Trace parent_trace;
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_read(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, ReadExtents* extents, IOContext io_context,
+      int op_flags, int read_flags, const ZTracer::Trace &parent_trace,
+      uint64_t* version, Context* on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  ReadRequest{object_no, extents,
+                                              read_flags, version},
+                                  io_context, op_flags, parent_trace,
+                                  on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_discard(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, uint64_t object_off, uint64_t object_len,
+      IOContext io_context, int discard_flags, uint64_t journal_tid,
+      const ZTracer::Trace &parent_trace, Context *on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  DiscardRequest{object_no, object_off,
+                                                 object_len, discard_flags,
+                                                 journal_tid},
+                                  io_context, 0, parent_trace, on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_write(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, uint64_t object_off, ceph::bufferlist&& data,
+      IOContext io_context, int op_flags, int write_flags,
+      std::optional<uint64_t> assert_version, uint64_t journal_tid,
+      const ZTracer::Trace &parent_trace, Context *on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  WriteRequest{object_no, object_off,
+                                               std::move(data), write_flags,
+                                               assert_version, journal_tid},
+                                  io_context, op_flags, parent_trace,
+                                  on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_write_same(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, uint64_t object_off, uint64_t object_len,
+      LightweightBufferExtents&& buffer_extents, ceph::bufferlist&& data,
+      IOContext io_context, int op_flags, uint64_t journal_tid,
+      const ZTracer::Trace &parent_trace, Context *on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  WriteSameRequest{object_no, object_off,
+                                                   object_len,
+                                                   std::move(buffer_extents),
+                                                   std::move(data),
+                                                   journal_tid},
+                                  io_context, op_flags, parent_trace,
+                                  on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_compare_and_write(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, uint64_t object_off, ceph::bufferlist&& cmp_data,
+      ceph::bufferlist&& write_data, IOContext io_context,
+      uint64_t *mismatch_offset, int op_flags, uint64_t journal_tid,
+      const ZTracer::Trace &parent_trace, Context *on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  CompareAndWriteRequest{object_no,
+                                                         object_off,
+                                                         std::move(cmp_data),
+                                                         std::move(write_data),
+                                                         mismatch_offset,
+                                                         journal_tid},
+                                  io_context, op_flags, parent_trace,
+                                  on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_flush(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      FlushSource flush_source, uint64_t journal_tid,
+      const ZTracer::Trace &parent_trace, Context *on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  FlushRequest{flush_source, journal_tid},
+                                  {}, 0, parent_trace, on_finish);
+  }
+
+  template <typename ImageCtxT>
+  static ObjectDispatchSpec* create_list_snaps(
+      ImageCtxT* image_ctx, ObjectDispatchLayer object_dispatch_layer,
+      uint64_t object_no, Extents&& extents, SnapIds&& snap_ids,
+      int list_snaps_flags, const ZTracer::Trace &parent_trace,
+      SnapshotDelta* snapshot_delta, Context* on_finish) {
+    return new ObjectDispatchSpec(image_ctx->io_object_dispatcher,
+                                  object_dispatch_layer,
+                                  ListSnapsRequest{object_no,
+                                                   std::move(extents),
+                                                   std::move(snap_ids),
+                                                   list_snaps_flags,
+                                                   snapshot_delta},
+                                  {}, 0, parent_trace, on_finish);
+  }
+
+  void send();
+  void fail(int r);
+
+private:
+  template <typename> friend class ObjectDispatcher;
+
+  ObjectDispatchSpec(ObjectDispatcherInterface* object_dispatcher,
+                     ObjectDispatchLayer object_dispatch_layer,
+                     Request&& request, IOContext io_context, int op_flags,
+                     const ZTracer::Trace& parent_trace, Context* on_finish)
+    : dispatcher_ctx(this, on_finish), object_dispatcher(object_dispatcher),
+      dispatch_layer(object_dispatch_layer), request(std::move(request)),
+      io_context(io_context), op_flags(op_flags), parent_trace(parent_trace) {
+  }
+
+};
+
+} // namespace io
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_IO_OBJECT_DISPATCH_SPEC_H