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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 CEPHFS_MIRROR_MIRROR_WATCHER_H | |
5 | #define CEPHFS_MIRROR_MIRROR_WATCHER_H | |
6 | ||
7 | #include <string_view> | |
8 | ||
9 | #include "common/ceph_mutex.h" | |
10 | #include "include/Context.h" | |
11 | #include "include/rados/librados.hpp" | |
12 | #include "Watcher.h" | |
13 | ||
14 | class ContextWQ; | |
15 | class Messenger; | |
16 | ||
17 | namespace cephfs { | |
18 | namespace mirror { | |
19 | ||
20 | class FSMirror; | |
21 | ||
22 | // watch for notifications via cephfs_mirror object (in metadata | |
23 | // pool). this is used sending keepalived with keepalive payload | |
24 | // being the rados instance address (used by the manager module | |
25 | // to blocklist when needed). | |
26 | ||
27 | class MirrorWatcher : public Watcher { | |
28 | public: | |
29 | static MirrorWatcher *create(librados::IoCtx &ioctx, FSMirror *fs_mirror, | |
30 | ContextWQ *work_queue) { | |
31 | return new MirrorWatcher(ioctx, fs_mirror, work_queue); | |
32 | } | |
33 | ||
34 | MirrorWatcher(librados::IoCtx &ioctx, FSMirror *fs_mirror, | |
35 | ContextWQ *work_queue); | |
36 | ~MirrorWatcher(); | |
37 | ||
38 | void init(Context *on_finish); | |
39 | void shutdown(Context *on_finish); | |
40 | ||
41 | void handle_notify(uint64_t notify_id, uint64_t handle, | |
42 | uint64_t notifier_id, bufferlist& bl) override; | |
43 | void handle_rewatch_complete(int r) override; | |
44 | ||
45 | bool is_blocklisted() { | |
46 | std::scoped_lock locker(m_lock); | |
47 | return m_blocklisted; | |
48 | } | |
49 | ||
50 | bool is_failed() { | |
51 | std::scoped_lock locker(m_lock); | |
52 | return m_failed; | |
53 | } | |
54 | ||
55 | private: | |
56 | librados::IoCtx &m_ioctx; | |
57 | FSMirror *m_fs_mirror; | |
58 | ContextWQ *m_work_queue; | |
59 | ||
60 | ceph::mutex m_lock; | |
61 | std::string m_instance_id; | |
62 | ||
63 | Context *m_on_init_finish = nullptr; | |
64 | Context *m_on_shutdown_finish = nullptr; | |
65 | ||
66 | bool m_blocklisted = false; | |
67 | bool m_failed = false; | |
68 | ||
69 | void register_watcher(); | |
70 | void handle_register_watcher(int r); | |
71 | ||
72 | void unregister_watcher(); | |
73 | void handle_unregister_watcher(int r); | |
74 | }; | |
75 | ||
76 | } // namespace mirror | |
77 | } // namespace cephfs | |
78 | ||
79 | #endif // CEPHFS_MIRROR_MIRROR_WATCHER_H |