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-rw-r--r--src/librbd/io/RefreshImageDispatch.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/librbd/io/RefreshImageDispatch.h b/src/librbd/io/RefreshImageDispatch.h
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+++ b/src/librbd/io/RefreshImageDispatch.h
@@ -0,0 +1,101 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IO_REFRESH_IMAGE_DISPATCH_H
+#define CEPH_LIBRBD_IO_REFRESH_IMAGE_DISPATCH_H
+
+#include "librbd/io/ImageDispatchInterface.h"
+#include "include/int_types.h"
+#include "include/buffer.h"
+#include "common/zipkin_trace.h"
+#include "common/Throttle.h"
+#include "librbd/io/ReadResult.h"
+#include "librbd/io/Types.h"
+
+struct Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace io {
+
+struct AioCompletion;
+
+template <typename ImageCtxT>
+class RefreshImageDispatch : public ImageDispatchInterface {
+public:
+ RefreshImageDispatch(ImageCtxT* image_ctx);
+
+ ImageDispatchLayer get_dispatch_layer() const override {
+ return IMAGE_DISPATCH_LAYER_REFRESH;
+ }
+
+ void shut_down(Context* on_finish) override;
+
+ bool 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) override;
+ bool 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) override;
+ bool 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) override;
+ bool 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) override;
+ bool 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) override;
+ bool 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) override;
+
+ bool list_snaps(
+ AioCompletion* aio_comp, Extents&& image_extents, SnapIds&& snap_ids,
+ int list_snaps_flags, SnapshotDelta* snapshot_delta,
+ const ZTracer::Trace &parent_trace, uint64_t tid,
+ std::atomic<uint32_t>* image_dispatch_flags,
+ DispatchResult* dispatch_result, Context** on_finish,
+ Context* on_dispatched) override {
+ return false;
+ }
+
+ bool invalidate_cache(Context* on_finish) override {
+ return false;
+ }
+
+private:
+ ImageCtxT* m_image_ctx;
+
+ bool needs_refresh(DispatchResult* dispatch_result, Context* on_dispatched);
+
+};
+
+} // namespace io
+} // namespace librbd
+
+extern template class librbd::io::RefreshImageDispatch<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IO_REFRESH_IMAGE_DISPATCH_H