1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "PassthroughImageCache.h"
5 #include "include/buffer.h"
6 #include "common/dout.h"
7 #include "librbd/ImageCtx.h"
9 #define dout_subsys ceph_subsys_rbd
11 #define dout_prefix *_dout << "librbd::PassthroughImageCache: " << this << " " \
18 PassthroughImageCache<I>::PassthroughImageCache(ImageCtx &image_ctx)
19 : m_image_ctx(image_ctx), m_image_writeback(image_ctx) {
23 void PassthroughImageCache<I>::aio_read(Extents &&image_extents, bufferlist *bl,
24 int fadvise_flags, Context *on_finish) {
25 CephContext *cct = m_image_ctx.cct;
26 ldout(cct, 20) << "image_extents=" << image_extents << ", "
27 << "on_finish=" << on_finish << dendl;
29 m_image_writeback.aio_read(std::move(image_extents), bl, fadvise_flags,
34 void PassthroughImageCache<I>::aio_write(Extents &&image_extents,
38 CephContext *cct = m_image_ctx.cct;
39 ldout(cct, 20) << "image_extents=" << image_extents << ", "
40 << "on_finish=" << on_finish << dendl;
42 m_image_writeback.aio_write(std::move(image_extents), std::move(bl),
43 fadvise_flags, on_finish);
47 void PassthroughImageCache<I>::aio_discard(uint64_t offset, uint64_t length,
48 bool skip_partial_discard, Context *on_finish) {
49 CephContext *cct = m_image_ctx.cct;
50 ldout(cct, 20) << "offset=" << offset << ", "
51 << "length=" << length << ", "
52 << "on_finish=" << on_finish << dendl;
54 m_image_writeback.aio_discard(offset, length, skip_partial_discard, on_finish);
58 void PassthroughImageCache<I>::aio_flush(Context *on_finish) {
59 CephContext *cct = m_image_ctx.cct;
60 ldout(cct, 20) << "on_finish=" << on_finish << dendl;
62 m_image_writeback.aio_flush(on_finish);
66 void PassthroughImageCache<I>::aio_writesame(uint64_t offset, uint64_t length,
67 bufferlist&& bl, int fadvise_flags,
69 CephContext *cct = m_image_ctx.cct;
70 ldout(cct, 20) << "offset=" << offset << ", "
71 << "length=" << length << ", "
72 << "data_len=" << bl.length() << ", "
73 << "on_finish=" << on_finish << dendl;
75 m_image_writeback.aio_writesame(offset, length, std::move(bl), fadvise_flags,
80 void PassthroughImageCache<I>::aio_compare_and_write(Extents &&image_extents,
83 uint64_t *mismatch_offset,
86 CephContext *cct = m_image_ctx.cct;
87 ldout(cct, 20) << "image_extents=" << image_extents << ", "
88 << "on_finish=" << on_finish << dendl;
90 m_image_writeback.aio_compare_and_write(
91 std::move(image_extents), std::move(cmp_bl), std::move(bl), mismatch_offset,
92 fadvise_flags, on_finish);
96 void PassthroughImageCache<I>::init(Context *on_finish) {
97 CephContext *cct = m_image_ctx.cct;
98 ldout(cct, 20) << dendl;
100 on_finish->complete(0);
103 template <typename I>
104 void PassthroughImageCache<I>::shut_down(Context *on_finish) {
105 CephContext *cct = m_image_ctx.cct;
106 ldout(cct, 20) << dendl;
108 on_finish->complete(0);
111 template <typename I>
112 void PassthroughImageCache<I>::invalidate(Context *on_finish) {
113 CephContext *cct = m_image_ctx.cct;
114 ldout(cct, 20) << dendl;
116 // dump cache contents (don't have anything)
117 on_finish->complete(0);
120 template <typename I>
121 void PassthroughImageCache<I>::flush(Context *on_finish) {
122 CephContext *cct = m_image_ctx.cct;
123 ldout(cct, 20) << dendl;
125 // internal flush -- nothing to writeback but make sure
126 // in-flight IO is flushed
127 aio_flush(on_finish);
131 } // namespace librbd
133 template class librbd::cache::PassthroughImageCache<librbd::ImageCtx>;