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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/migration/ImageDispatch.h"
#include "include/neorados/RADOS.hpp"
#include "common/dout.h"
#include "librbd/ImageCtx.h"
#include "librbd/io/AioCompletion.h"
#include "librbd/migration/FormatInterface.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::migration::ImageDispatch: " << this \
<< " " << __func__ << ": "
namespace librbd {
namespace migration {
template <typename I>
ImageDispatch<I>::ImageDispatch(I* image_ctx,
std::unique_ptr<FormatInterface> format)
: m_image_ctx(image_ctx), m_format(std::move(format)) {
auto cct = m_image_ctx->cct;
ldout(cct, 10) << "ictx=" << image_ctx << dendl;
}
template <typename I>
void ImageDispatch<I>::shut_down(Context* on_finish) {
auto cct = m_image_ctx->cct;
ldout(cct, 10) << dendl;
on_finish->complete(0);
}
template <typename I>
bool ImageDispatch<I>::read(
io::AioCompletion* aio_comp, io::Extents &&image_extents,
io::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,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
*dispatch_result = io::DISPATCH_RESULT_COMPLETE;
return m_format->read(aio_comp, io_context->read_snap().value_or(CEPH_NOSNAP),
std::move(image_extents), std::move(read_result),
op_flags, read_flags, parent_trace);
}
template <typename I>
bool ImageDispatch<I>::write(
io::AioCompletion* aio_comp, io::Extents &&image_extents, bufferlist &&bl,
int op_flags, const ZTracer::Trace &parent_trace,
uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
lderr(cct) << dendl;
fail_io(-EROFS, aio_comp, dispatch_result);
return true;
}
template <typename I>
bool ImageDispatch<I>::discard(
io::AioCompletion* aio_comp, io::Extents &&image_extents,
uint32_t discard_granularity_bytes, const ZTracer::Trace &parent_trace,
uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
lderr(cct) << dendl;
fail_io(-EROFS, aio_comp, dispatch_result);
return true;
}
template <typename I>
bool ImageDispatch<I>::write_same(
io::AioCompletion* aio_comp, io::Extents &&image_extents, bufferlist &&bl,
int op_flags, const ZTracer::Trace &parent_trace,
uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
lderr(cct) << dendl;
fail_io(-EROFS, aio_comp, dispatch_result);
return true;
}
template <typename I>
bool ImageDispatch<I>::compare_and_write(
io::AioCompletion* aio_comp, io::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,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
lderr(cct) << dendl;
fail_io(-EROFS, aio_comp, dispatch_result);
return true;
}
template <typename I>
bool ImageDispatch<I>::flush(
io::AioCompletion* aio_comp, io::FlushSource flush_source,
const ZTracer::Trace &parent_trace, uint64_t tid,
std::atomic<uint32_t>* image_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
*dispatch_result = io::DISPATCH_RESULT_COMPLETE;
aio_comp->set_request_count(0);
return true;
}
template <typename I>
bool ImageDispatch<I>::list_snaps(
io::AioCompletion* aio_comp, io::Extents&& image_extents,
io::SnapIds&& snap_ids, int list_snaps_flags,
io::SnapshotDelta* snapshot_delta, const ZTracer::Trace &parent_trace,
uint64_t tid, std::atomic<uint32_t>* image_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
*dispatch_result = io::DISPATCH_RESULT_COMPLETE;
aio_comp->set_request_count(1);
auto ctx = new io::C_AioRequest(aio_comp);
m_format->list_snaps(std::move(image_extents), std::move(snap_ids),
list_snaps_flags, snapshot_delta, parent_trace,
ctx);
return true;
}
template <typename I>
void ImageDispatch<I>::fail_io(int r, io::AioCompletion* aio_comp,
io::DispatchResult* dispatch_result) {
*dispatch_result = io::DISPATCH_RESULT_COMPLETE;
aio_comp->fail(r);
}
} // namespace migration
} // namespace librbd
template class librbd::migration::ImageDispatch<librbd::ImageCtx>;
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