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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"
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9#include "librbd/Types.h"
10#include <string>
11
12class Context;
13
14namespace librbd {
15
16class ImageCtx;
17
18namespace operation {
19
20template <typename ImageCtxT = ImageCtx>
21class SnapshotRemoveRequest : public Request<ImageCtxT> {
22public:
23 /**
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24 * @verbatim
25 *
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26 * <start>
27 * |
28 * v
29 * TRASH_SNAP
30 * |
31 * v (skip if unsupported)
32 * GET_SNAP
33 * |
34 * v (skip if unnecessary)
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35 * LIST_CHILDREN <-------------\
36 * | |
37 * v (skip if unnecessary) | (repeat as needed)
38 * DETACH_STALE_CHILD ---------/
39 * |
40 * v (skip if unnecessary)
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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>
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54 *
55 * @endverbatim
7c673cae 56 */
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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 }
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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
70protected:
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
78private:
79 cls::rbd::SnapshotNamespace m_snap_namespace;
92f5a8d4 80 cls::rbd::ChildImageSpecs m_child_images;
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81 std::string m_snap_name;
82 uint64_t m_snap_id;
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83 bool m_trashed_snapshot = false;
84 bool m_child_attached = false;
7c673cae 85
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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
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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
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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
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109 void remove_snap();
110 void handle_remove_snap(int r);
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111
112 void remove_snap_context();
11fdf7f2 113 int scan_for_parents(cls::rbd::ParentImageSpec &pspec);
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114
115};
116
117} // namespace operation
118} // namespace librbd
119
120extern template class librbd::operation::SnapshotRemoveRequest<librbd::ImageCtx>;
121
122#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H