1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #ifndef CEPH_LIBRBD_CACHE_IMAGE_CACHE
5 #define CEPH_LIBRBD_CACHE_IMAGE_CACHE
7 #include "include/buffer_fwd.h"
8 #include "include/int_types.h"
17 * client-side, image extent cache interface
20 typedef std::vector<std::pair<uint64_t,uint64_t> > Extents;
22 virtual ~ImageCache() {
25 /// client AIO methods
26 virtual void aio_read(Extents&& image_extents, ceph::bufferlist* bl,
27 int fadvise_flags, Context *on_finish) = 0;
28 virtual void aio_write(Extents&& image_extents, ceph::bufferlist&& bl,
29 int fadvise_flags, Context *on_finish) = 0;
30 virtual void aio_discard(uint64_t offset, uint64_t length,
31 bool skip_partial_discard, Context *on_finish) = 0;
32 virtual void aio_flush(Context *on_finish) = 0;
33 virtual void aio_writesame(uint64_t offset, uint64_t length,
34 ceph::bufferlist&& bl,
35 int fadvise_flags, Context *on_finish) = 0;
36 virtual void aio_compare_and_write(Extents&& image_extents,
37 ceph::bufferlist&& cmp_bl,
38 ceph::bufferlist&& bl,
39 uint64_t *mismatch_offset,
41 Context *on_finish) = 0;
43 /// internal state methods
44 virtual void init(Context *on_finish) = 0;
45 virtual void shut_down(Context *on_finish) = 0;
47 virtual void invalidate(Context *on_finish) = 0;
48 virtual void flush(Context *on_finish) = 0;
55 #endif // CEPH_LIBRBD_CACHE_IMAGE_CACHE