1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_WRITELOG_IMAGE_DISPATCH_H
#define CEPH_LIBRBD_WRITELOG_IMAGE_DISPATCH_H
#include "librbd/io/ImageDispatchInterface.h"
#include "include/int_types.h"
#include "include/buffer.h"
#include "common/zipkin_trace.h"
#include "librbd/io/ReadResult.h"
#include "librbd/io/Types.h"
#include "librbd/plugin/Api.h"
struct Context;
namespace librbd {
struct ImageCtx;
namespace cache {
namespace pwl { template <typename> class AbstractWriteLog; }
template <typename ImageCtxT>
class WriteLogImageDispatch : public io::ImageDispatchInterface {
public:
WriteLogImageDispatch(ImageCtxT* image_ctx,
pwl::AbstractWriteLog<ImageCtx> *image_cache,
plugin::Api<ImageCtxT>& plugin_api) :
m_image_ctx(image_ctx), m_image_cache(image_cache),
m_plugin_api(plugin_api) {
}
io::ImageDispatchLayer get_dispatch_layer() const override {
return io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE;
}
void shut_down(Context* on_finish) override;
bool 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) override;
bool 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) override;
bool 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) override;
bool 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) override;
bool 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) override;
bool 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) override;
bool 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) override;
bool invalidate_cache(Context* on_finish) override;
private:
ImageCtxT* m_image_ctx;
pwl::AbstractWriteLog<ImageCtx> *m_image_cache;
plugin::Api<ImageCtxT>& m_plugin_api;
bool preprocess_length(
io::AioCompletion* aio_comp, io::Extents &image_extents) const;
};
} // namespace cache
} // namespace librbd
extern template class librbd::cache::WriteLogImageDispatch<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_WRITELOG_IMAGE_DISPATCH_H
|
