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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_MANAGED_LOCK_ACQUIRE_REQUEST_H | |
5 | #define CEPH_LIBRBD_MANAGED_LOCK_ACQUIRE_REQUEST_H | |
6 | ||
7 | #include "include/rados/librados.hpp" | |
8 | #include "include/int_types.h" | |
9 | #include "include/buffer.h" | |
10 | #include "msg/msg_types.h" | |
11 | #include "librbd/managed_lock/Types.h" | |
12 | #include "librbd/watcher/Types.h" | |
13 | #include <string> | |
14 | ||
15 | class Context; | |
16 | class ContextWQ; | |
17 | ||
18 | namespace librbd { | |
19 | ||
20 | class Watcher; | |
21 | ||
22 | namespace managed_lock { | |
23 | ||
24 | template <typename ImageCtxT> | |
25 | class AcquireRequest { | |
26 | private: | |
27 | typedef watcher::Traits<ImageCtxT> TypeTraits; | |
28 | typedef typename TypeTraits::Watcher Watcher; | |
29 | ||
30 | public: | |
31 | static AcquireRequest* create(librados::IoCtx& ioctx, Watcher *watcher, | |
32 | ContextWQ *work_queue, const std::string& oid, | |
33 | const std::string& cookie, | |
34 | bool exclusive, | |
35 | bool blacklist_on_break_lock, | |
36 | uint32_t blacklist_expire_seconds, | |
37 | Context *on_finish); | |
38 | ||
39 | ~AcquireRequest(); | |
40 | void send(); | |
41 | ||
42 | private: | |
43 | ||
44 | /** | |
45 | * @verbatim | |
46 | * | |
47 | * <start> | |
48 | * | | |
49 | * v | |
31f18b77 FG |
50 | * GET_LOCKER |
51 | * | ^ | |
52 | * | . (EBUSY && no cached locker) | |
53 | * | . | |
54 | * | . (EBUSY && cached locker) | |
55 | * \--> LOCK_IMAGE * * * * * * * * > BREAK_LOCK . . . . . | |
56 | * | ^ | . | |
57 | * | | | (success) . | |
58 | * | \-------------------------/ . | |
59 | * v . | |
60 | * <finish> < . . . . . . . . . . . . . . . . . . . | |
7c673cae FG |
61 | * |
62 | * @endverbatim | |
63 | */ | |
64 | ||
65 | AcquireRequest(librados::IoCtx& ioctx, Watcher *watcher, | |
66 | ContextWQ *work_queue, const std::string& oid, | |
67 | const std::string& cookie, bool exclusive, | |
68 | bool blacklist_on_break_lock, | |
69 | uint32_t blacklist_expire_seconds, Context *on_finish); | |
70 | ||
71 | librados::IoCtx& m_ioctx; | |
72 | Watcher *m_watcher; | |
73 | CephContext *m_cct; | |
74 | ContextWQ *m_work_queue; | |
75 | std::string m_oid; | |
76 | std::string m_cookie; | |
77 | bool m_exclusive; | |
78 | bool m_blacklist_on_break_lock; | |
79 | uint32_t m_blacklist_expire_seconds; | |
80 | Context *m_on_finish; | |
81 | ||
82 | bufferlist m_out_bl; | |
83 | ||
84 | Locker m_locker; | |
85 | ||
86 | void send_get_locker(); | |
87 | void handle_get_locker(int r); | |
88 | ||
89 | void send_lock(); | |
90 | void handle_lock(int r); | |
91 | ||
92 | void send_break_lock(); | |
93 | void handle_break_lock(int r); | |
94 | ||
95 | void finish(int r); | |
96 | }; | |
97 | ||
98 | } // namespace managed_lock | |
99 | } // namespace librbd | |
100 | ||
101 | #endif // CEPH_LIBRBD_MANAGED_LOCK_ACQUIRE_REQUEST_H |