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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_OPERATION_SNAPSHOT_PROTECT_REQUEST_H | |
5 | #define CEPH_LIBRBD_OPERATION_SNAPSHOT_PROTECT_REQUEST_H | |
6 | ||
7 | #include "librbd/operation/Request.h" | |
8 | #include <string> | |
9 | ||
10 | class Context; | |
11 | ||
12 | namespace librbd { | |
13 | ||
14 | class ImageCtx; | |
15 | ||
16 | namespace operation { | |
17 | ||
18 | template <typename ImageCtxT = ImageCtx> | |
19 | class SnapshotProtectRequest : public Request<ImageCtxT> { | |
20 | public: | |
21 | /** | |
22 | * Snap Protect goes through the following state machine: | |
23 | * | |
24 | * @verbatim | |
25 | * | |
26 | * <start> | |
27 | * | | |
28 | * v | |
29 | * STATE_PROTECT_SNAP | |
30 | * | | |
31 | * v | |
32 | * <finish> | |
33 | * | |
34 | * @endverbatim | |
35 | * | |
36 | */ | |
37 | enum State { | |
38 | STATE_PROTECT_SNAP | |
39 | }; | |
40 | ||
41 | SnapshotProtectRequest(ImageCtxT &image_ctx, Context *on_finish, | |
42 | const cls::rbd::SnapshotNamespace &snap_namespace, | |
43 | const std::string &snap_name); | |
44 | ||
45 | protected: | |
46 | void send_op() override; | |
47 | bool should_complete(int r) override; | |
48 | ||
49 | journal::Event create_event(uint64_t op_tid) const override { | |
50 | return journal::SnapProtectEvent(op_tid, m_snap_namespace, m_snap_name); | |
51 | } | |
52 | ||
53 | private: | |
54 | cls::rbd::SnapshotNamespace m_snap_namespace; | |
55 | std::string m_snap_name; | |
56 | State m_state; | |
57 | ||
58 | void send_protect_snap(); | |
59 | ||
60 | int verify_and_send_protect_snap(); | |
61 | }; | |
62 | ||
63 | } // namespace operation | |
64 | } // namespace librbd | |
65 | ||
66 | extern template class librbd::operation::SnapshotProtectRequest<librbd::ImageCtx>; | |
67 | ||
68 | #endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_PROTECT_REQUEST_H |