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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 <mutex> | |
5 | #include <vector> | |
6 | ||
7 | #include "common/ceph_context.h" | |
8 | #include "common/debug.h" | |
9 | #include "common/errno.h" | |
10 | #include "mon/MonClient.h" | |
11 | ||
12 | #include "ClusterWatcher.h" | |
13 | #include "ServiceDaemon.h" | |
14 | ||
15 | #define dout_context g_ceph_context | |
16 | #define dout_subsys ceph_subsys_cephfs_mirror | |
17 | #undef dout_prefix | |
18 | #define dout_prefix *_dout << "cephfs::mirror::ClusterWatcher " << __func__ | |
19 | ||
20 | namespace cephfs { | |
21 | namespace mirror { | |
22 | ||
23 | ClusterWatcher::ClusterWatcher(CephContext *cct, MonClient *monc, ServiceDaemon *service_daemon, | |
24 | Listener &listener) | |
25 | : Dispatcher(cct), | |
26 | m_monc(monc), | |
27 | m_service_daemon(service_daemon), | |
28 | m_listener(listener) { | |
29 | } | |
30 | ||
31 | ClusterWatcher::~ClusterWatcher() { | |
32 | } | |
33 | ||
34 | bool ClusterWatcher::ms_can_fast_dispatch2(const cref_t<Message> &m) const { | |
35 | return m->get_type() == CEPH_MSG_FS_MAP; | |
36 | } | |
37 | ||
38 | void ClusterWatcher::ms_fast_dispatch2(const ref_t<Message> &m) { | |
39 | bool handled = ms_dispatch2(m); | |
40 | ceph_assert(handled); | |
41 | } | |
42 | ||
43 | bool ClusterWatcher::ms_dispatch2(const ref_t<Message> &m) { | |
44 | if (m->get_type() == CEPH_MSG_FS_MAP) { | |
45 | if (m->get_connection()->get_peer_type() == CEPH_ENTITY_TYPE_MON) { | |
46 | handle_fsmap(ref_cast<MFSMap>(m)); | |
47 | } | |
48 | return true; | |
49 | } | |
50 | ||
51 | return false; | |
52 | } | |
53 | ||
54 | int ClusterWatcher::init() { | |
55 | dout(20) << dendl; | |
56 | ||
57 | bool sub = m_monc->sub_want("fsmap", 0, 0); | |
58 | if (!sub) { | |
59 | derr << ": failed subscribing to FSMap" << dendl; | |
60 | return -1; | |
61 | } | |
62 | ||
63 | m_monc->renew_subs(); | |
64 | dout(10) << ": subscribed to FSMap" << dendl; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | void ClusterWatcher::shutdown() { | |
69 | dout(20) << dendl; | |
70 | std::scoped_lock locker(m_lock); | |
a4b75251 | 71 | m_stopping = true; |
f67539c2 TL |
72 | m_monc->sub_unwant("fsmap"); |
73 | } | |
74 | ||
75 | void ClusterWatcher::handle_fsmap(const cref_t<MFSMap> &m) { | |
76 | dout(20) << dendl; | |
77 | ||
78 | auto fsmap = m->get_fsmap(); | |
79 | auto filesystems = fsmap.get_filesystems(); | |
80 | ||
81 | std::vector<Filesystem> mirroring_enabled; | |
82 | std::vector<Filesystem> mirroring_disabled; | |
83 | std::map<Filesystem, Peers> peers_added; | |
84 | std::map<Filesystem, Peers> peers_removed; | |
85 | std::map<Filesystem, uint64_t> fs_metadata_pools; | |
86 | { | |
87 | std::scoped_lock locker(m_lock); | |
a4b75251 TL |
88 | if (m_stopping) { |
89 | return; | |
90 | } | |
91 | ||
f67539c2 TL |
92 | // deleted filesystems are considered mirroring disabled |
93 | for (auto it = m_filesystem_peers.begin(); it != m_filesystem_peers.end();) { | |
94 | if (!fsmap.filesystem_exists(it->first.fscid)) { | |
95 | mirroring_disabled.emplace_back(it->first); | |
96 | it = m_filesystem_peers.erase(it); | |
97 | continue; | |
98 | } | |
99 | ++it; | |
100 | } | |
101 | ||
102 | for (auto &filesystem : filesystems) { | |
103 | auto fs = Filesystem{filesystem->fscid, | |
104 | std::string(filesystem->mds_map.get_fs_name())}; | |
105 | auto pool_id = filesystem->mds_map.get_metadata_pool(); | |
106 | auto &mirror_info = filesystem->mirror_info; | |
107 | ||
108 | if (!mirror_info.is_mirrored()) { | |
109 | auto it = m_filesystem_peers.find(fs); | |
110 | if (it != m_filesystem_peers.end()) { | |
111 | mirroring_disabled.emplace_back(fs); | |
112 | m_filesystem_peers.erase(it); | |
113 | } | |
114 | } else { | |
115 | auto [fspeersit, enabled] = m_filesystem_peers.emplace(fs, Peers{}); | |
116 | auto &peers = fspeersit->second; | |
117 | ||
118 | if (enabled) { | |
119 | mirroring_enabled.emplace_back(fs); | |
120 | fs_metadata_pools.emplace(fs, pool_id); | |
121 | } | |
122 | ||
123 | // peers added | |
124 | Peers added; | |
125 | std::set_difference(mirror_info.peers.begin(), mirror_info.peers.end(), | |
126 | peers.begin(), peers.end(), std::inserter(added, added.end())); | |
127 | ||
128 | // peers removed | |
129 | Peers removed; | |
130 | std::set_difference(peers.begin(), peers.end(), | |
131 | mirror_info.peers.begin(), mirror_info.peers.end(), | |
132 | std::inserter(removed, removed.end())); | |
133 | ||
134 | // update set | |
135 | if (!added.empty()) { | |
136 | peers_added.emplace(fs, added); | |
137 | peers.insert(added.begin(), added.end()); | |
138 | } | |
139 | if (!removed.empty()) { | |
140 | peers_removed.emplace(fs, removed); | |
141 | for (auto &p : removed) { | |
142 | peers.erase(p); | |
143 | } | |
144 | } | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | dout(5) << ": mirroring enabled=" << mirroring_enabled << ", mirroring_disabled=" | |
150 | << mirroring_disabled << dendl; | |
151 | for (auto &fs : mirroring_enabled) { | |
152 | m_service_daemon->add_filesystem(fs.fscid, fs.fs_name); | |
153 | m_listener.handle_mirroring_enabled(FilesystemSpec(fs, fs_metadata_pools.at(fs))); | |
154 | } | |
155 | for (auto &fs : mirroring_disabled) { | |
156 | m_service_daemon->remove_filesystem(fs.fscid); | |
157 | m_listener.handle_mirroring_disabled(fs); | |
158 | } | |
159 | ||
160 | dout(5) << ": peers added=" << peers_added << ", peers removed=" << peers_removed << dendl; | |
161 | ||
162 | for (auto &[fs, peers] : peers_added) { | |
163 | for (auto &peer : peers) { | |
164 | m_service_daemon->add_peer(fs.fscid, peer); | |
165 | m_listener.handle_peers_added(fs, peer); | |
166 | } | |
167 | } | |
168 | for (auto &[fs, peers] : peers_removed) { | |
169 | for (auto &peer : peers) { | |
170 | m_service_daemon->remove_peer(fs.fscid, peer); | |
171 | m_listener.handle_peers_removed(fs, peer); | |
172 | } | |
173 | } | |
174 | ||
a4b75251 TL |
175 | std::scoped_lock locker(m_lock); |
176 | if (!m_stopping) { | |
177 | m_monc->sub_got("fsmap", fsmap.get_epoch()); | |
178 | } // else we have already done a sub_unwant() | |
f67539c2 TL |
179 | } |
180 | ||
181 | } // namespace mirror | |
182 | } // namespace cephfs |