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
|
// Copyright 2019 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.
// Package btrfs provides access to statistics exposed by ext4 filesystems.
package ext4
import (
"path/filepath"
"strings"
"github.com/prometheus/procfs/internal/fs"
"github.com/prometheus/procfs/internal/util"
)
const (
sysFSPath = "fs"
sysFSExt4Path = "ext4"
)
// Stats contains statistics for a single Btrfs filesystem.
// See Linux fs/btrfs/sysfs.c for more information.
type Stats struct {
Name string
Errors uint64
Warnings uint64
Messages uint64
}
// FS represents the pseudo-filesystems proc and sys, which provides an
// interface to kernel data structures.
type FS struct {
proc *fs.FS
sys *fs.FS
}
// NewDefaultFS returns a new blockdevice fs using the default mountPoints for proc and sys.
// It will error if either of these mount points can't be read.
func NewDefaultFS() (FS, error) {
return NewFS(fs.DefaultProcMountPoint, fs.DefaultSysMountPoint)
}
// NewFS returns a new XFS handle using the given proc and sys mountPoints. It will error
// if either of the mounts point can't be read.
func NewFS(procMountPoint string, sysMountPoint string) (FS, error) {
if strings.TrimSpace(procMountPoint) == "" {
procMountPoint = fs.DefaultProcMountPoint
}
procfs, err := fs.NewFS(procMountPoint)
if err != nil {
return FS{}, err
}
if strings.TrimSpace(sysMountPoint) == "" {
sysMountPoint = fs.DefaultSysMountPoint
}
sysfs, err := fs.NewFS(sysMountPoint)
if err != nil {
return FS{}, err
}
return FS{&procfs, &sysfs}, nil
}
// ProcStat returns stats for the filesystem.
func (fs FS) ProcStat() ([]*Stats, error) {
matches, err := filepath.Glob(fs.sys.Path("fs/ext4/*"))
if err != nil {
return nil, err
}
stats := make([]*Stats, 0, len(matches))
for _, m := range matches {
s := &Stats{}
// "*" used in glob above indicates the name of the filesystem.
name := filepath.Base(m)
s.Name = name
for file, p := range map[string]*uint64{
"errors_count": &s.Errors,
"warning_count": &s.Warnings,
"msg_count": &s.Messages,
} {
var val uint64
val, err = util.ReadUintFromFile(fs.sys.Path(sysFSPath, sysFSExt4Path, name, file))
if err == nil {
*p = val
}
}
stats = append(stats, s)
}
return stats, nil
}
|
