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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "ImageWriteback.h"
#include "include/buffer.h"
#include "common/dout.h"
#include "librbd/ImageCtx.h"
#include "librbd/Utils.h"
#include "librbd/io/AioCompletion.h"
#include "librbd/io/ImageDispatchSpec.h"
#include "librbd/io/ImageRequest.h"
#include "librbd/io/ReadResult.h"
#undef dout_subsys
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::ImageWriteback: " << __func__ << ": "
namespace librbd {
namespace cache {
template <typename I>
ImageWriteback<I>::ImageWriteback(I &image_ctx) : m_image_ctx(image_ctx) {
}
template <typename I>
void ImageWriteback<I>::aio_read(Extents &&image_extents, bufferlist *bl,
int fadvise_flags, Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "image_extents=" << image_extents << ", "
<< "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_READ);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_read(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
std::move(image_extents), io::ImageArea::DATA, io::ReadResult{bl},
image_ctx->get_data_io_context(), fadvise_flags, 0, trace);
req->send();
}
template <typename I>
void ImageWriteback<I>::aio_write(Extents &&image_extents,
ceph::bufferlist&& bl,
int fadvise_flags, Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "image_extents=" << image_extents << ", "
<< "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_WRITE);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_write(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
std::move(image_extents), io::ImageArea::DATA, std::move(bl),
fadvise_flags, trace);
req->send();
}
template <typename I>
void ImageWriteback<I>::aio_discard(uint64_t offset, uint64_t length,
uint32_t discard_granularity_bytes,
Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "offset=" << offset << ", "
<< "length=" << length << ", "
<< "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_DISCARD);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_discard(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
{{offset, length}}, io::ImageArea::DATA, discard_granularity_bytes, trace);
req->send();
}
template <typename I>
void ImageWriteback<I>::aio_flush(io::FlushSource flush_source,
Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_FLUSH);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_flush(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
flush_source, trace);
req->send();
}
template <typename I>
void ImageWriteback<I>::aio_writesame(uint64_t offset, uint64_t length,
ceph::bufferlist&& bl,
int fadvise_flags, Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "offset=" << offset << ", "
<< "length=" << length << ", "
<< "data_len=" << bl.length() << ", "
<< "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_WRITESAME);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_write_same(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
{{offset, length}}, io::ImageArea::DATA, std::move(bl),
fadvise_flags, trace);
req->send();
}
template <typename I>
void ImageWriteback<I>::aio_compare_and_write(Extents &&image_extents,
ceph::bufferlist&& cmp_bl,
ceph::bufferlist&& bl,
uint64_t *mismatch_offset,
int fadvise_flags,
Context *on_finish) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "image_extents=" << image_extents << ", "
<< "on_finish=" << on_finish << dendl;
ImageCtx *image_ctx = util::get_image_ctx(&m_image_ctx);
auto aio_comp = io::AioCompletion::create_and_start(
on_finish, image_ctx, io::AIO_TYPE_COMPARE_AND_WRITE);
ZTracer::Trace trace;
auto req = io::ImageDispatchSpec::create_compare_and_write(
*image_ctx, io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, aio_comp,
std::move(image_extents), io::ImageArea::DATA, std::move(cmp_bl),
std::move(bl), mismatch_offset, fadvise_flags, trace);
req->send();
}
} // namespace cache
} // namespace librbd
template class librbd::cache::ImageWriteback<librbd::ImageCtx>;
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