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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
commite6918187568dbd01842d8d1d2c808ce16a894239 (patch)
tree64f88b554b444a49f656b6c656111a145cbbaa28 /src/librbd/io/WriteBlockImageDispatch.h
parentInitial commit. (diff)
downloadceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz
ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/librbd/io/WriteBlockImageDispatch.h')
-rw-r--r--src/librbd/io/WriteBlockImageDispatch.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/src/librbd/io/WriteBlockImageDispatch.h b/src/librbd/io/WriteBlockImageDispatch.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IO_WRITE_BLOCK_IMAGE_DISPATCH_H
+#define CEPH_LIBRBD_IO_WRITE_BLOCK_IMAGE_DISPATCH_H
+
+#include "librbd/io/ImageDispatchInterface.h"
+#include "include/int_types.h"
+#include "include/buffer.h"
+#include "common/ceph_mutex.h"
+#include "common/zipkin_trace.h"
+#include "common/Throttle.h"
+#include "librbd/io/ReadResult.h"
+#include "librbd/io/Types.h"
+#include <list>
+
+struct Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace io {
+
+struct AioCompletion;
+
+template <typename ImageCtxT>
+class WriteBlockImageDispatch : public ImageDispatchInterface {
+public:
+ WriteBlockImageDispatch(ImageCtxT* image_ctx);
+
+ ImageDispatchLayer get_dispatch_layer() const override {
+ return IMAGE_DISPATCH_LAYER_WRITE_BLOCK;
+ }
+
+ void shut_down(Context* on_finish) override;
+
+ int block_writes();
+ void block_writes(Context *on_blocked);
+ void unblock_writes();
+
+ inline bool writes_blocked() const {
+ std::shared_lock locker{m_lock};
+ return (m_write_blockers > 0);
+ }
+
+ void wait_on_writes_unblocked(Context *on_unblocked);
+
+ 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 {
+ return false;
+ }
+ 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;
+ }
+
+private:
+ struct C_BlockedWrites;
+
+ typedef std::list<Context*> Contexts;
+
+ ImageCtxT* m_image_ctx;
+
+ mutable ceph::shared_mutex m_lock;
+ Contexts m_on_dispatches;
+
+ uint32_t m_write_blockers = 0;
+ Contexts m_write_blocker_contexts;
+ Contexts m_unblocked_write_waiter_contexts;
+ uint64_t m_in_flight_writes = 0;
+
+ void handle_finished(int r, uint64_t tid);
+
+ bool process_io(uint64_t tid, DispatchResult* dispatch_result,
+ Context** on_finish, Context* on_dispatched);
+ void flush_io(Context* on_finish);
+
+ bool invalidate_cache(Context* on_finish) override {
+ return false;
+ }
+
+ void handle_blocked_writes(int r);
+
+};
+
+} // namespace io
+} // namespace librbd
+
+extern template class librbd::io::WriteBlockImageDispatch<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IO_WRITE_BLOCK_IMAGE_DISPATCH_H