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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
package createconfig
import (
"fmt"
"strconv"
"strings"
"github.com/docker/go-units"
)
// weightDevice is a structure that holds device:weight pair
type weightDevice struct {
path string
weight uint16
}
func (w *weightDevice) String() string {
return fmt.Sprintf("%s:%d", w.path, w.weight)
}
// LinuxNS is a struct that contains namespace information
// It implemented Valid to show it is a valid namespace
type LinuxNS interface {
Valid() bool
}
// IsNS returns if the specified string has a ns: prefix
func IsNS(s string) bool {
parts := strings.SplitN(s, ":", 2)
return len(parts) > 1 && parts[0] == "ns"
}
// IsPod returns if the specified string is pod
func IsPod(s string) bool {
return s == "pod"
}
// Valid checks the validity of a linux namespace
// s should be the string representation of ns
func Valid(s string, ns LinuxNS) bool {
return IsPod(s) || IsNS(s) || ns.Valid()
}
// NS is the path to the namespace to join.
func NS(s string) string {
parts := strings.SplitN(s, ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// validateweightDevice validates that the specified string has a valid device-weight format
// for blkio-weight-device flag
func validateweightDevice(val string) (*weightDevice, error) {
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
weight, err := strconv.ParseUint(split[1], 10, 0)
if err != nil {
return nil, fmt.Errorf("invalid weight for device: %s", val)
}
if weight > 0 && (weight < 10 || weight > 1000) {
return nil, fmt.Errorf("invalid weight for device: %s", val)
}
return &weightDevice{
path: split[0],
weight: uint16(weight),
}, nil
}
// throttleDevice is a structure that holds device:rate_per_second pair
type throttleDevice struct {
path string
rate uint64
}
func (t *throttleDevice) String() string {
return fmt.Sprintf("%s:%d", t.path, t.rate)
}
// validateBpsDevice validates that the specified string has a valid device-rate format
// for device-read-bps and device-write-bps flags
func validateBpsDevice(val string) (*throttleDevice, error) {
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := units.RAMInBytes(split[1])
if err != nil {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
}
if rate < 0 {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
}
return &throttleDevice{
path: split[0],
rate: uint64(rate),
}, nil
}
// validateIOpsDevice validates that the specified string has a valid device-rate format
// for device-write-iops and device-read-iops flags
func validateIOpsDevice(val string) (*throttleDevice, error) { //nolint
split := strings.SplitN(val, ":", 2)
if len(split) != 2 {
return nil, fmt.Errorf("bad format: %s", val)
}
if !strings.HasPrefix(split[0], "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := strconv.ParseUint(split[1], 10, 64)
if err != nil {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
}
if rate < 0 {
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
}
return &throttleDevice{
path: split[0],
rate: uint64(rate),
}, nil
}
func getLoggingPath(opts []string) string {
for _, opt := range opts {
arr := strings.SplitN(opt, "=", 2)
if len(arr) == 2 {
if strings.TrimSpace(arr[0]) == "path" {
return strings.TrimSpace(arr[1])
}
}
}
return ""
}
// parseDevice parses device mapping string to a src, dest & permissions string
func parseDevice(device string) (string, string, string, error) { //nolint
src := ""
dst := ""
permissions := "rwm"
arr := strings.Split(device, ":")
switch len(arr) {
case 3:
if !validDeviceMode(arr[2]) {
return "", "", "", fmt.Errorf("invalid device mode: %s", arr[2])
}
permissions = arr[2]
fallthrough
case 2:
if validDeviceMode(arr[1]) {
permissions = arr[1]
} else {
if arr[1][0] != '/' {
return "", "", "", fmt.Errorf("invalid device mode: %s", arr[2])
}
dst = arr[1]
}
fallthrough
case 1:
src = arr[0]
default:
return "", "", "", fmt.Errorf("invalid device specification: %s", device)
}
if dst == "" {
dst = src
}
return src, dst, permissions, nil
}
// validDeviceMode checks if the mode for device is valid or not.
// Valid mode is a composition of r (read), w (write), and m (mknod).
func validDeviceMode(mode string) bool {
var legalDeviceMode = map[rune]bool{
'r': true,
'w': true,
'm': true,
}
if mode == "" {
return false
}
for _, c := range mode {
if !legalDeviceMode[c] {
return false
}
legalDeviceMode[c] = false
}
return true
}
|
