blob: 46323bb52ccfaa2e54be4fa5397af3b6859d9b01 (
plain)
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
77
78
79
80
81
82
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
// vim: ts=8 sw=2 smarttab expandtab
#pragma once
#include "include/types.h"
#include "crimson/common/errorator.h"
#include "crimson/common/exception.h"
#include "crimson/common/type_helpers.h"
namespace crimson::osd {
class PG;
/**
* IOInterruptCondition
*
* Encapsulates logic for determining whether a continuation chain
* started at <epoch_started> should be halted for once of two reasons:
* 1. PG instance is stopping (includes if OSD is shutting down)
* 2. A map advance has caused an interval change since <epoch_started>
*
* <epoch_started> should be the epoch at which the operation was logically
* started, which may or may not pg->get_osdmap_epoch() at the time at which
* with_interruption is actually invoked.
*/
class IOInterruptCondition {
public:
IOInterruptCondition(Ref<PG>& pg, epoch_t epoch_started);
~IOInterruptCondition();
/**
* new_interval_created()
*
* Returns true iff the pg has entered a new interval since <epoch_started>
* (<epoch_started> < pg->get_interval_start_epoch())
*/
bool new_interval_created();
/// true iff pg->stopping
bool is_stopping();
/**
* is_primary
*
* True iff the pg is still primary. Used to populate
* ::crimson::common::actingset_changed upon interval change
* to indicate whether client IOs should be requeued.
*/
bool is_primary();
template <typename Fut>
std::optional<Fut> may_interrupt() {
if (new_interval_created()) {
return seastar::futurize<Fut>::make_exception_future(
::crimson::common::actingset_changed(is_primary()));
}
if (is_stopping()) {
return seastar::futurize<Fut>::make_exception_future(
::crimson::common::system_shutdown_exception());
}
return std::optional<Fut>();
}
template <typename T>
static constexpr bool is_interruption_v =
std::is_same_v<T, ::crimson::common::actingset_changed>
|| std::is_same_v<T, ::crimson::common::system_shutdown_exception>;
static bool is_interruption(std::exception_ptr& eptr) {
return (*eptr.__cxa_exception_type() ==
typeid(::crimson::common::actingset_changed) ||
*eptr.__cxa_exception_type() ==
typeid(::crimson::common::system_shutdown_exception));
}
private:
Ref<PG> pg;
epoch_t epoch_started;
};
} // namespace crimson::osd
|
