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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_REMOVE_REQUEST_H | |
5 | #define CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H | |
6 | ||
7 | #include "librbd/operation/Request.h" | |
11fdf7f2 | 8 | #include "include/buffer.h" |
7c673cae FG |
9 | #include "librbd/Types.h" |
10 | #include <string> | |
11 | ||
12 | class Context; | |
13 | ||
14 | namespace librbd { | |
15 | ||
16 | class ImageCtx; | |
17 | ||
18 | namespace operation { | |
19 | ||
20 | template <typename ImageCtxT = ImageCtx> | |
21 | class SnapshotRemoveRequest : public Request<ImageCtxT> { | |
22 | public: | |
23 | /** | |
7c673cae FG |
24 | * @verbatim |
25 | * | |
11fdf7f2 TL |
26 | * <start> |
27 | * | | |
28 | * v | |
29 | * TRASH_SNAP | |
30 | * | | |
31 | * v (skip if unsupported) | |
32 | * GET_SNAP | |
33 | * | | |
34 | * v (skip if unnecessary) | |
92f5a8d4 TL |
35 | * LIST_CHILDREN <-------------\ |
36 | * | | | |
37 | * v (skip if unnecessary) | (repeat as needed) | |
38 | * DETACH_STALE_CHILD ---------/ | |
39 | * | | |
40 | * v (skip if unnecessary) | |
11fdf7f2 TL |
41 | * DETACH_CHILD |
42 | * | | |
43 | * v (skip if disabled/in-use) | |
44 | * REMOVE_OBJECT_MAP | |
45 | * | | |
46 | * v (skip if in-use) | |
47 | * RELEASE_SNAP_ID | |
48 | * | | |
49 | * v (skip if in-use) | |
50 | * REMOVE_SNAP | |
51 | * | | |
52 | * v | |
53 | * <finish> | |
7c673cae FG |
54 | * |
55 | * @endverbatim | |
7c673cae | 56 | */ |
11fdf7f2 TL |
57 | |
58 | static SnapshotRemoveRequest *create( | |
59 | ImageCtxT &image_ctx, const cls::rbd::SnapshotNamespace &snap_namespace, | |
60 | const std::string &snap_name, uint64_t snap_id, Context *on_finish) { | |
61 | return new SnapshotRemoveRequest(image_ctx, on_finish, snap_namespace, | |
62 | snap_name, snap_id); | |
63 | } | |
7c673cae FG |
64 | |
65 | SnapshotRemoveRequest(ImageCtxT &image_ctx, Context *on_finish, | |
66 | const cls::rbd::SnapshotNamespace &snap_namespace, | |
67 | const std::string &snap_name, | |
68 | uint64_t snap_id); | |
69 | ||
70 | protected: | |
71 | void send_op() override; | |
72 | bool should_complete(int r) override; | |
73 | ||
74 | journal::Event create_event(uint64_t op_tid) const override { | |
75 | return journal::SnapRemoveEvent(op_tid, m_snap_namespace, m_snap_name); | |
76 | } | |
77 | ||
78 | private: | |
79 | cls::rbd::SnapshotNamespace m_snap_namespace; | |
92f5a8d4 | 80 | cls::rbd::ChildImageSpecs m_child_images; |
7c673cae FG |
81 | std::string m_snap_name; |
82 | uint64_t m_snap_id; | |
11fdf7f2 TL |
83 | bool m_trashed_snapshot = false; |
84 | bool m_child_attached = false; | |
7c673cae | 85 | |
11fdf7f2 TL |
86 | ceph::bufferlist m_out_bl; |
87 | ||
88 | void trash_snap(); | |
89 | void handle_trash_snap(int r); | |
90 | ||
91 | void get_snap(); | |
92 | void handle_get_snap(int r); | |
93 | ||
92f5a8d4 TL |
94 | void list_children(); |
95 | void handle_list_children(int r); | |
96 | ||
97 | void detach_stale_child(); | |
98 | void handle_detach_stale_child(int r); | |
99 | ||
11fdf7f2 TL |
100 | void detach_child(); |
101 | void handle_detach_child(int r); | |
102 | ||
103 | void remove_object_map(); | |
104 | void handle_remove_object_map(int r); | |
105 | ||
106 | void release_snap_id(); | |
107 | void handle_release_snap_id(int r); | |
7c673cae | 108 | |
11fdf7f2 TL |
109 | void remove_snap(); |
110 | void handle_remove_snap(int r); | |
7c673cae FG |
111 | |
112 | void remove_snap_context(); | |
11fdf7f2 | 113 | int scan_for_parents(cls::rbd::ParentImageSpec &pspec); |
7c673cae FG |
114 | |
115 | }; | |
116 | ||
117 | } // namespace operation | |
118 | } // namespace librbd | |
119 | ||
120 | extern template class librbd::operation::SnapshotRemoveRequest<librbd::ImageCtx>; | |
121 | ||
122 | #endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H |