1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_RBD_MIRROR_IMAGE_MAP_STATE_TRANSITION_H
#define CEPH_RBD_MIRROR_IMAGE_MAP_STATE_TRANSITION_H
#include "tools/rbd_mirror/image_map/Types.h"
#include <boost/optional.hpp>
#include <map>
namespace rbd {
namespace mirror {
namespace image_map {
class StateTransition {
public:
enum State {
STATE_UNASSOCIATED,
STATE_INITIALIZING,
STATE_ASSOCIATING,
STATE_ASSOCIATED,
STATE_SHUFFLING,
STATE_DISSOCIATING
};
enum PolicyAction {
POLICY_ACTION_MAP,
POLICY_ACTION_UNMAP,
POLICY_ACTION_REMOVE
};
struct Transition {
// image map action
ActionType action_type = ACTION_TYPE_NONE;
// policy internal action
boost::optional<PolicyAction> start_policy_action;
boost::optional<PolicyAction> finish_policy_action;
// state machine complete
boost::optional<State> finish_state;
Transition() {
}
Transition(ActionType action_type,
const boost::optional<PolicyAction>& start_policy_action,
const boost::optional<PolicyAction>& finish_policy_action,
const boost::optional<State>& finish_state)
: action_type(action_type), start_policy_action(start_policy_action),
finish_policy_action(finish_policy_action), finish_state(finish_state) {
}
};
static bool is_idle(State state) {
return (state == STATE_UNASSOCIATED || state == STATE_ASSOCIATED);
}
static void transit(State state, Transition* transition);
private:
typedef std::pair<State, ActionType> TransitionKey;
typedef std::map<TransitionKey, Transition> TransitionTable;
// image transition table
static const TransitionTable s_transition_table;
};
std::ostream &operator<<(std::ostream &os, const StateTransition::State &state);
std::ostream &operator<<(std::ostream &os,
const StateTransition::PolicyAction &policy_action);
} // namespace image_map
} // namespace mirror
} // namespace rbd
#endif // CEPH_RBD_MIRROR_IMAGE_MAP_STATE_TRANSITION_H
|
