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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_MIRROR_DEMOTE_REQUEST_H | |
5 | #define CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H | |
6 | ||
7 | #include "cls/rbd/cls_rbd_types.h" | |
8 | #include "librbd/mirror/Types.h" | |
9 | ||
10 | struct Context; | |
11 | ||
12 | namespace librbd { | |
13 | ||
14 | struct ImageCtx; | |
15 | ||
16 | namespace mirror { | |
17 | ||
18 | template <typename ImageCtxT = librbd::ImageCtx> | |
19 | class DemoteRequest { | |
20 | public: | |
21 | static DemoteRequest *create(ImageCtxT &image_ctx, Context *on_finish) { | |
22 | return new DemoteRequest(image_ctx, on_finish); | |
23 | } | |
24 | ||
25 | DemoteRequest(ImageCtxT &image_ctx, Context *on_finish) | |
26 | : m_image_ctx(image_ctx), m_on_finish(on_finish) { | |
27 | } | |
28 | ||
29 | void send(); | |
30 | ||
31 | private: | |
32 | /** | |
33 | * @verbatim | |
34 | * | |
35 | * <start> | |
36 | * | | |
37 | * v | |
38 | * GET_INFO | |
39 | * | | |
40 | * v | |
41 | * ACQUIRE_LOCK * * * * | |
42 | * | * | |
43 | * v * | |
44 | * DEMOTE * | |
45 | * | * | |
46 | * v * | |
47 | * RELEASE_LOCK * | |
48 | * | * | |
49 | * v * | |
50 | * <finish> < * * * * * | |
51 | * | |
52 | * @endverbatim | |
53 | */ | |
54 | ||
55 | ImageCtxT &m_image_ctx; | |
56 | Context *m_on_finish; | |
57 | ||
58 | int m_ret_val = 0; | |
59 | bool m_blocked_requests = false; | |
60 | ||
61 | cls::rbd::MirrorImage m_mirror_image; | |
11fdf7f2 | 62 | PromotionState m_promotion_state = PROMOTION_STATE_PRIMARY; |
7c673cae FG |
63 | |
64 | void get_info(); | |
65 | void handle_get_info(int r); | |
66 | ||
67 | void acquire_lock(); | |
68 | void handle_acquire_lock(int r); | |
69 | ||
70 | void demote(); | |
71 | void handle_demote(int r); | |
72 | ||
73 | void release_lock(); | |
74 | void handle_release_lock(int r); | |
75 | ||
76 | void finish(int r); | |
77 | ||
78 | }; | |
79 | ||
80 | } // namespace mirror | |
81 | } // namespace librbd | |
82 | ||
83 | extern template class librbd::mirror::DemoteRequest<librbd::ImageCtx>; | |
84 | ||
85 | #endif // CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H |