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// -*- 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,
IOContext io_context, 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, IOContext io_context,
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,
IOContext io_context, 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, IOContext io_context,
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>;
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