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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright 2023 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux
// +build linux
package sysfs
import (
"fmt"
"os"
"path/filepath"
"github.com/prometheus/procfs/internal/util"
)
const watchdogClassPath = "class/watchdog"
// WatchdogStats contains info from files in /sys/class/watchdog for a single watchdog device.
// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-watchdog
type WatchdogStats struct {
Name string
Bootstatus *int64 // /sys/class/watchdog/<Name>/bootstatus
Options *string // /sys/class/watchdog/<Name>/options
FwVersion *int64 // /sys/class/watchdog/<Name>/fw_version
Identity *string // /sys/class/watchdog/<Name>/identity
Nowayout *int64 // /sys/class/watchdog/<Name>/nowayout
State *string // /sys/class/watchdog/<Name>/state
Status *string // /sys/class/watchdog/<Name>/status
Timeleft *int64 // /sys/class/watchdog/<Name>/timeleft
Timeout *int64 // /sys/class/watchdog/<Name>/timeout
Pretimeout *int64 // /sys/class/watchdog/<Name>/pretimeout
PretimeoutGovernor *string // /sys/class/watchdog/<Name>/pretimeout_governor
AccessCs0 *int64 // /sys/class/watchdog/<Name>/access_cs0
}
// WatchdogClass is a collection of statistics for every watchdog device in /sys/class/watchdog.
//
// The map keys are the names of the watchdog devices.
type WatchdogClass map[string]WatchdogStats
// WatchdogClass returns info for all watchdog devices read from /sys/class/watchdog.
func (fs FS) WatchdogClass() (WatchdogClass, error) {
path := fs.sys.Path(watchdogClassPath)
dirs, err := os.ReadDir(path)
if err != nil {
return nil, fmt.Errorf("failed to list watchdog devices at %q: %w", path, err)
}
wds := make(WatchdogClass, len(dirs))
for _, d := range dirs {
stats, err := fs.parseWatchdog(d.Name())
if err != nil {
return nil, err
}
wds[stats.Name] = *stats
}
return wds, nil
}
func (fs FS) parseWatchdog(wdName string) (*WatchdogStats, error) {
path := fs.sys.Path(watchdogClassPath, wdName)
wd := WatchdogStats{Name: wdName}
for _, f := range [...]string{"bootstatus", "options", "fw_version", "identity", "nowayout", "state", "status", "timeleft", "timeout", "pretimeout", "pretimeout_governor", "access_cs0"} {
name := filepath.Join(path, f)
value, err := util.SysReadFile(name)
if err != nil {
if os.IsNotExist(err) {
continue
}
return nil, fmt.Errorf("failed to read file %q: %w", name, err)
}
vp := util.NewValueParser(value)
switch f {
case "bootstatus":
wd.Bootstatus = vp.PInt64()
case "options":
wd.Options = &value
case "fw_version":
wd.FwVersion = vp.PInt64()
case "identity":
wd.Identity = &value
case "nowayout":
wd.Nowayout = vp.PInt64()
case "state":
wd.State = &value
case "status":
wd.Status = &value
case "timeleft":
wd.Timeleft = vp.PInt64()
case "timeout":
wd.Timeout = vp.PInt64()
case "pretimeout":
wd.Pretimeout = vp.PInt64()
case "pretimeout_governor":
wd.PretimeoutGovernor = &value
case "access_cs0":
wd.AccessCs0 = vp.PInt64()
}
if err := vp.Err(); err != nil {
return nil, err
}
}
return &wd, nil
}
|
