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-rw-r--r--src/librbd/cache/ImageWriteback.cc127
1 files changed, 127 insertions, 0 deletions
diff --git a/src/librbd/cache/ImageWriteback.cc b/src/librbd/cache/ImageWriteback.cc
new file mode 100644
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--- /dev/null
+++ b/src/librbd/cache/ImageWriteback.cc
@@ -0,0 +1,127 @@
+// -*- 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/io/AioCompletion.h"
+#include "librbd/io/ImageRequest.h"
+#include "librbd/io/ReadResult.h"
+
+#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;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_READ);
+ io::ImageReadRequest<I> req(m_image_ctx, aio_comp, std::move(image_extents),
+ io::ReadResult{bl}, fadvise_flags, {});
+ req.set_bypass_image_cache();
+ 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;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_WRITE);
+ io::ImageWriteRequest<I> req(m_image_ctx, aio_comp, std::move(image_extents),
+ std::move(bl), fadvise_flags, {});
+ req.set_bypass_image_cache();
+ 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;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_DISCARD);
+ io::ImageDiscardRequest<I> req(m_image_ctx, aio_comp, {{offset, length}},
+ discard_granularity_bytes, {});
+ req.set_bypass_image_cache();
+ req.send();
+}
+
+template <typename I>
+void ImageWriteback<I>::aio_flush(Context *on_finish) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 20) << "on_finish=" << on_finish << dendl;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_FLUSH);
+ io::ImageFlushRequest<I> req(m_image_ctx, aio_comp, io::FLUSH_SOURCE_INTERNAL,
+ {});
+ req.set_bypass_image_cache();
+ 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;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_WRITESAME);
+ io::ImageWriteSameRequest<I> req(m_image_ctx, aio_comp, {{offset, length}},
+ std::move(bl), fadvise_flags, {});
+ req.set_bypass_image_cache();
+ 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;
+
+ auto aio_comp = io::AioCompletion::create_and_start(on_finish, &m_image_ctx,
+ io::AIO_TYPE_COMPARE_AND_WRITE);
+ io::ImageCompareAndWriteRequest<I> req(m_image_ctx, aio_comp,
+ std::move(image_extents),
+ std::move(cmp_bl), std::move(bl),
+ mismatch_offset, fadvise_flags, {});
+ req.set_bypass_image_cache();
+ req.send();
+}
+
+} // namespace cache
+} // namespace librbd
+
+template class librbd::cache::ImageWriteback<librbd::ImageCtx>;
+