1 files changed, 154 insertions, 0 deletions
diff --git a/src/librbd/io/QueueImageDispatch.cc b/src/librbd/io/QueueImageDispatch.cc
new file mode 100644
index 000000000..ea5ed63b4
--- /dev/null
+++ b/src/librbd/io/QueueImageDispatch.cc
@@ -0,0 +1,154 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/io/QueueImageDispatch.h"
+#include "common/dout.h"
+#include "common/Cond.h"
+#include "librbd/AsioEngine.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "librbd/io/AioCompletion.h"
+#include "librbd/io/FlushTracker.h"
+#include "librbd/io/ImageDispatchSpec.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::io::QueueImageDispatch: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace io {
+
+template <typename I>
+QueueImageDispatch<I>::QueueImageDispatch(I* image_ctx)
+  : m_image_ctx(image_ctx), m_flush_tracker(new FlushTracker<I>(image_ctx)) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 5) << "ictx=" << image_ctx << dendl;
+}
+
+template <typename I>
+QueueImageDispatch<I>::~QueueImageDispatch() {
+  delete m_flush_tracker;
+}
+
+template <typename I>
+void QueueImageDispatch<I>::shut_down(Context* on_finish) {
+  m_flush_tracker->shut_down();
+  on_finish->complete(0);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::read(
+    AioCompletion* aio_comp, Extents &&image_extents, ReadResult &&read_result,
+    IOContext io_context, int op_flags, int read_flags,
+    const ZTracer::Trace &parent_trace, uint64_t tid,
+    std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  return enqueue(true, tid, dispatch_result, on_finish, on_dispatched);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::write(
+    AioCompletion* aio_comp, Extents &&image_extents, bufferlist &&bl,
+    int op_flags, const ZTracer::Trace &parent_trace,
+    uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  return enqueue(false, tid, dispatch_result, on_finish, on_dispatched);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::discard(
+    AioCompletion* aio_comp, Extents &&image_extents,
+    uint32_t discard_granularity_bytes, const ZTracer::Trace &parent_trace,
+    uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  return enqueue(false, tid, dispatch_result, on_finish, on_dispatched);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::write_same(
+    AioCompletion* aio_comp, Extents &&image_extents, bufferlist &&bl,
+    int op_flags, const ZTracer::Trace &parent_trace,
+    uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  return enqueue(false, tid, dispatch_result, on_finish, on_dispatched);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::compare_and_write(
+    AioCompletion* aio_comp, Extents &&image_extents,
+    bufferlist &&cmp_bl, bufferlist &&bl, uint64_t *mismatch_offset,
+    int op_flags, const ZTracer::Trace &parent_trace,
+    uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  return enqueue(false, tid, dispatch_result, on_finish, on_dispatched);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::flush(
+    AioCompletion* aio_comp, FlushSource flush_source,
+    const ZTracer::Trace &parent_trace, uint64_t tid,
+    std::atomic<uint32_t>* image_dispatch_flags,
+    DispatchResult* dispatch_result, Context** on_finish,
+    Context* on_dispatched) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  *dispatch_result = DISPATCH_RESULT_CONTINUE;
+  m_flush_tracker->flush(on_dispatched);
+  return true;
+}
+
+template <typename I>
+void QueueImageDispatch<I>::handle_finished(int r, uint64_t tid) {
+  auto cct = m_image_ctx->cct;
+  ldout(cct, 20) << "tid=" << tid << dendl;
+
+  m_flush_tracker->finish_io(tid);
+}
+
+template <typename I>
+bool QueueImageDispatch<I>::enqueue(
+    bool read_op, uint64_t tid, DispatchResult* dispatch_result,
+    Context** on_finish, Context* on_dispatched) {
+  if (!m_image_ctx->non_blocking_aio) {
+    return false;
+  }
+
+  if (!read_op) {
+    m_flush_tracker->start_io(tid);
+    *on_finish = new LambdaContext([this, tid, on_finish=*on_finish](int r) {
+        handle_finished(r, tid);
+        on_finish->complete(r);
+      });
+  }
+
+  *dispatch_result = DISPATCH_RESULT_CONTINUE;
+  m_image_ctx->asio_engine->post(on_dispatched, 0);
+  return true;
+}
+
+} // namespace io
+} // namespace librbd
+
+template class librbd::io::QueueImageDispatch<librbd::ImageCtx>;