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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 | #include "librbd/mirror/GetInfoRequest.h" | |
5 | #include "common/dout.h" | |
6 | #include "common/errno.h" | |
7 | #include "cls/rbd/cls_rbd_client.h" | |
8 | #include "librbd/ImageCtx.h" | |
9 | #include "librbd/ImageState.h" | |
10 | #include "librbd/Journal.h" | |
11 | #include "librbd/Utils.h" | |
12 | ||
13 | #define dout_subsys ceph_subsys_rbd | |
14 | #undef dout_prefix | |
15 | #define dout_prefix *_dout << "librbd::mirror::GetInfoRequest: " << this \ | |
16 | << " " << __func__ << ": " | |
17 | ||
18 | namespace librbd { | |
19 | namespace mirror { | |
20 | ||
21 | using librbd::util::create_context_callback; | |
22 | using librbd::util::create_rados_callback; | |
23 | ||
24 | template <typename I> | |
25 | void GetInfoRequest<I>::send() { | |
26 | refresh_image(); | |
27 | } | |
28 | ||
29 | template <typename I> | |
30 | void GetInfoRequest<I>::refresh_image() { | |
31 | if (!m_image_ctx.state->is_refresh_required()) { | |
32 | get_mirror_image(); | |
33 | return; | |
34 | } | |
35 | ||
36 | CephContext *cct = m_image_ctx.cct; | |
37 | ldout(cct, 20) << dendl; | |
38 | ||
39 | auto ctx = create_context_callback< | |
40 | GetInfoRequest<I>, &GetInfoRequest<I>::handle_refresh_image>(this); | |
41 | m_image_ctx.state->refresh(ctx); | |
42 | } | |
43 | ||
44 | template <typename I> | |
45 | void GetInfoRequest<I>::handle_refresh_image(int r) { | |
46 | CephContext *cct = m_image_ctx.cct; | |
47 | ldout(cct, 20) << "r=" << r << dendl; | |
48 | ||
49 | if (r < 0) { | |
50 | lderr(cct) << "failed to refresh image: " << cpp_strerror(r) << dendl; | |
51 | finish(r); | |
52 | return; | |
53 | } | |
54 | ||
55 | get_mirror_image(); | |
56 | } | |
57 | ||
58 | template <typename I> | |
59 | void GetInfoRequest<I>::get_mirror_image() { | |
60 | CephContext *cct = m_image_ctx.cct; | |
61 | ldout(cct, 20) << dendl; | |
62 | ||
63 | librados::ObjectReadOperation op; | |
64 | cls_client::mirror_image_get_start(&op, m_image_ctx.id); | |
65 | ||
66 | librados::AioCompletion *comp = create_rados_callback< | |
67 | GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_mirror_image>(this); | |
68 | int r = m_image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl); | |
11fdf7f2 | 69 | ceph_assert(r == 0); |
7c673cae FG |
70 | comp->release(); |
71 | } | |
72 | ||
73 | template <typename I> | |
74 | void GetInfoRequest<I>::handle_get_mirror_image(int r) { | |
75 | CephContext *cct = m_image_ctx.cct; | |
76 | ldout(cct, 20) << "r=" << r << dendl; | |
77 | ||
78 | m_mirror_image->state = cls::rbd::MIRROR_IMAGE_STATE_DISABLED; | |
79 | *m_promotion_state = PROMOTION_STATE_NON_PRIMARY; | |
80 | if (r == 0) { | |
11fdf7f2 | 81 | auto iter = m_out_bl.cbegin(); |
7c673cae FG |
82 | r = cls_client::mirror_image_get_finish(&iter, m_mirror_image); |
83 | } | |
84 | ||
85 | if (r == -ENOENT || | |
86 | m_mirror_image->state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { | |
87 | ldout(cct, 20) << "mirroring is disabled" << dendl; | |
88 | finish(0); | |
89 | return; | |
90 | } else if (r < 0) { | |
91 | lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) | |
92 | << dendl; | |
93 | finish(r); | |
94 | return; | |
95 | } | |
96 | ||
97 | get_tag_owner(); | |
98 | } | |
99 | ||
100 | template <typename I> | |
101 | void GetInfoRequest<I>::get_tag_owner() { | |
102 | CephContext *cct = m_image_ctx.cct; | |
103 | ldout(cct, 20) << dendl; | |
104 | ||
105 | auto ctx = create_context_callback< | |
106 | GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_tag_owner>(this); | |
107 | Journal<I>::get_tag_owner(m_image_ctx.md_ctx, m_image_ctx.id, | |
108 | &m_mirror_uuid, m_image_ctx.op_work_queue, ctx); | |
109 | } | |
110 | ||
111 | template <typename I> | |
112 | void GetInfoRequest<I>::handle_get_tag_owner(int r) { | |
113 | CephContext *cct = m_image_ctx.cct; | |
114 | ldout(cct, 20) << "r=" << r << dendl; | |
115 | ||
116 | if (r < 0) { | |
117 | lderr(cct) << "failed to determine tag ownership: " << cpp_strerror(r) | |
118 | << dendl; | |
119 | finish(r); | |
120 | return; | |
121 | } | |
122 | ||
123 | if (m_mirror_uuid == Journal<>::LOCAL_MIRROR_UUID) { | |
124 | *m_promotion_state = PROMOTION_STATE_PRIMARY; | |
125 | } else if (m_mirror_uuid == Journal<>::ORPHAN_MIRROR_UUID) { | |
126 | *m_promotion_state = PROMOTION_STATE_ORPHAN; | |
127 | } | |
128 | ||
129 | finish(0); | |
130 | } | |
131 | ||
132 | template <typename I> | |
133 | void GetInfoRequest<I>::finish(int r) { | |
134 | CephContext *cct = m_image_ctx.cct; | |
135 | ldout(cct, 20) << "r=" << r << dendl; | |
136 | ||
137 | m_on_finish->complete(r); | |
138 | delete this; | |
139 | } | |
140 | ||
141 | } // namespace mirror | |
142 | } // namespace librbd | |
143 | ||
144 | template class librbd::mirror::GetInfoRequest<librbd::ImageCtx>; |