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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() { | |
7c673cae FG |
26 | get_mirror_image(); |
27 | } | |
28 | ||
29 | template <typename I> | |
30 | void GetInfoRequest<I>::get_mirror_image() { | |
31 | CephContext *cct = m_image_ctx.cct; | |
32 | ldout(cct, 20) << dendl; | |
33 | ||
34 | librados::ObjectReadOperation op; | |
35 | cls_client::mirror_image_get_start(&op, m_image_ctx.id); | |
36 | ||
37 | librados::AioCompletion *comp = create_rados_callback< | |
38 | GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_mirror_image>(this); | |
39 | int r = m_image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl); | |
11fdf7f2 | 40 | ceph_assert(r == 0); |
7c673cae FG |
41 | comp->release(); |
42 | } | |
43 | ||
44 | template <typename I> | |
45 | void GetInfoRequest<I>::handle_get_mirror_image(int r) { | |
46 | CephContext *cct = m_image_ctx.cct; | |
47 | ldout(cct, 20) << "r=" << r << dendl; | |
48 | ||
49 | m_mirror_image->state = cls::rbd::MIRROR_IMAGE_STATE_DISABLED; | |
50 | *m_promotion_state = PROMOTION_STATE_NON_PRIMARY; | |
51 | if (r == 0) { | |
11fdf7f2 | 52 | auto iter = m_out_bl.cbegin(); |
7c673cae FG |
53 | r = cls_client::mirror_image_get_finish(&iter, m_mirror_image); |
54 | } | |
55 | ||
56 | if (r == -ENOENT || | |
57 | m_mirror_image->state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { | |
58 | ldout(cct, 20) << "mirroring is disabled" << dendl; | |
59 | finish(0); | |
60 | return; | |
61 | } else if (r < 0) { | |
62 | lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) | |
63 | << dendl; | |
64 | finish(r); | |
65 | return; | |
66 | } | |
67 | ||
68 | get_tag_owner(); | |
69 | } | |
70 | ||
71 | template <typename I> | |
72 | void GetInfoRequest<I>::get_tag_owner() { | |
73 | CephContext *cct = m_image_ctx.cct; | |
74 | ldout(cct, 20) << dendl; | |
75 | ||
76 | auto ctx = create_context_callback< | |
77 | GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_tag_owner>(this); | |
78 | Journal<I>::get_tag_owner(m_image_ctx.md_ctx, m_image_ctx.id, | |
79 | &m_mirror_uuid, m_image_ctx.op_work_queue, ctx); | |
80 | } | |
81 | ||
82 | template <typename I> | |
83 | void GetInfoRequest<I>::handle_get_tag_owner(int r) { | |
84 | CephContext *cct = m_image_ctx.cct; | |
85 | ldout(cct, 20) << "r=" << r << dendl; | |
86 | ||
87 | if (r < 0) { | |
88 | lderr(cct) << "failed to determine tag ownership: " << cpp_strerror(r) | |
89 | << dendl; | |
90 | finish(r); | |
91 | return; | |
92 | } | |
93 | ||
94 | if (m_mirror_uuid == Journal<>::LOCAL_MIRROR_UUID) { | |
95 | *m_promotion_state = PROMOTION_STATE_PRIMARY; | |
96 | } else if (m_mirror_uuid == Journal<>::ORPHAN_MIRROR_UUID) { | |
97 | *m_promotion_state = PROMOTION_STATE_ORPHAN; | |
98 | } | |
99 | ||
100 | finish(0); | |
101 | } | |
102 | ||
103 | template <typename I> | |
104 | void GetInfoRequest<I>::finish(int r) { | |
105 | CephContext *cct = m_image_ctx.cct; | |
106 | ldout(cct, 20) << "r=" << r << dendl; | |
107 | ||
108 | m_on_finish->complete(r); | |
109 | delete this; | |
110 | } | |
111 | ||
112 | } // namespace mirror | |
113 | } // namespace librbd | |
114 | ||
115 | template class librbd::mirror::GetInfoRequest<librbd::ImageCtx>; |