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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #ifndef CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H | |
5 | #define CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H | |
6 | ||
33c7a0ef | 7 | #include "json_spirit/json_spirit.h" |
f67539c2 TL |
8 | #include "librbd/ImageCtx.h" |
9 | #include "librbd/cache/Types.h" | |
10 | #include <string> | |
11 | ||
f67539c2 TL |
12 | namespace ceph { |
13 | class Formatter; | |
14 | } | |
15 | ||
16 | namespace librbd { | |
17 | ||
18 | namespace plugin { template <typename> struct Api; } | |
19 | ||
20 | namespace cache { | |
21 | namespace pwl { | |
22 | ||
23 | template <typename ImageCtxT = ImageCtx> | |
24 | class ImageCacheState { | |
25 | private: | |
26 | ImageCtxT* m_image_ctx; | |
27 | plugin::Api<ImageCtxT>& m_plugin_api; | |
28 | public: | |
29 | bool present = false; | |
30 | bool empty = true; | |
31 | bool clean = true; | |
32 | std::string host; | |
33 | std::string path; | |
33c7a0ef | 34 | std::string mode; |
f67539c2 | 35 | uint64_t size = 0; |
33c7a0ef TL |
36 | /* After reloading, the following data does not need to be read, |
37 | * but recalculated. */ | |
38 | utime_t stats_timestamp; | |
39 | uint64_t allocated_bytes = 0; | |
40 | uint64_t cached_bytes = 0; | |
41 | uint64_t dirty_bytes = 0; | |
42 | uint64_t free_bytes = 0; | |
43 | uint64_t hits_full = 0; | |
44 | uint64_t hits_partial = 0; | |
45 | uint64_t misses = 0; | |
46 | uint64_t hit_bytes = 0; | |
47 | uint64_t miss_bytes = 0; | |
48 | ||
49 | ImageCacheState(ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api) | |
50 | : m_image_ctx(image_ctx), m_plugin_api(plugin_api) {} | |
f67539c2 TL |
51 | |
52 | ~ImageCacheState() {} | |
53 | ||
33c7a0ef TL |
54 | ImageCacheType get_image_cache_mode() const { |
55 | if (mode == "rwl") { | |
f67539c2 | 56 | return IMAGE_CACHE_TYPE_RWL; |
33c7a0ef | 57 | } else if (mode == "ssd") { |
f67539c2 TL |
58 | return IMAGE_CACHE_TYPE_SSD; |
59 | } | |
60 | return IMAGE_CACHE_TYPE_UNKNOWN; | |
61 | } | |
62 | ||
33c7a0ef TL |
63 | void init_from_config(); |
64 | bool init_from_metadata(json_spirit::mValue& json_root); | |
f67539c2 | 65 | |
2a845540 TL |
66 | void write_image_cache_state(std::unique_lock<ceph::mutex>& locker, |
67 | Context *on_finish); | |
f67539c2 TL |
68 | |
69 | void clear_image_cache_state(Context *on_finish); | |
70 | ||
f67539c2 TL |
71 | static ImageCacheState<ImageCtxT>* create_image_cache_state( |
72 | ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api, int &r); | |
73 | ||
74 | static ImageCacheState<ImageCtxT>* get_image_cache_state( | |
75 | ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api); | |
76 | ||
77 | bool is_valid(); | |
78 | }; | |
79 | ||
80 | } // namespace pwl | |
81 | } // namespace cache | |
82 | } // namespace librbd | |
83 | ||
84 | extern template class librbd::cache::pwl::ImageCacheState<librbd::ImageCtx>; | |
85 | ||
86 | #endif // CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H |