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_WRITEBACK
5 #define CEPH_LIBRBD_CACHE_IMAGE_WRITEBACK
7 #include "include/buffer_fwd.h"
8 #include "include/int_types.h"
20 * client-side, image extent cache writeback handler
22 template <typename ImageCtxT = librbd::ImageCtx>
23 class ImageWriteback {
25 typedef std::vector<std::pair<uint64_t,uint64_t> > Extents;
27 ImageWriteback(ImageCtxT &image_ctx);
29 void aio_read(Extents &&image_extents, ceph::bufferlist *bl,
30 int fadvise_flags, Context *on_finish);
31 void aio_write(Extents &&image_extents, ceph::bufferlist&& bl,
32 int fadvise_flags, Context *on_finish);
33 void aio_discard(uint64_t offset, uint64_t length,
34 bool skip_partial_discard, Context *on_finish);
35 void aio_flush(Context *on_finish);
36 void aio_writesame(uint64_t offset, uint64_t length,
37 ceph::bufferlist&& bl,
38 int fadvise_flags, Context *on_finish);
39 void aio_compare_and_write(Extents &&image_extents,
40 ceph::bufferlist&& cmp_bl,
41 ceph::bufferlist&& bl,
42 uint64_t *mismatch_offset,
43 int fadvise_flags, Context *on_finish);
45 ImageCtxT &m_image_ctx;
52 extern template class librbd::cache::ImageWriteback<librbd::ImageCtx>;
54 #endif // CEPH_LIBRBD_CACHE_IMAGE_WRITEBACK