forked from snapcore/snapd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
common.go
187 lines (160 loc) · 5.41 KB
/
common.go
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
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2018 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
import (
"io/ioutil"
"path/filepath"
"github.com/snapcore/snapd/interfaces"
"github.com/snapcore/snapd/interfaces/apparmor"
"github.com/snapcore/snapd/interfaces/kmod"
"github.com/snapcore/snapd/interfaces/mount"
"github.com/snapcore/snapd/interfaces/seccomp"
"github.com/snapcore/snapd/interfaces/udev"
"github.com/snapcore/snapd/osutil"
"github.com/snapcore/snapd/snap"
)
// evalSymlinks is either filepath.EvalSymlinks or a mocked function for
// applicable for testing.
var evalSymlinks = filepath.EvalSymlinks
// readDir is either ioutil.ReadDir or a mocked function for applicable for
// testing.
var readDir = ioutil.ReadDir
type commonInterface struct {
name string
summary string
docURL string
implicitOnCore bool
implicitOnClassic bool
baseDeclarationPlugs string
baseDeclarationSlots string
connectedPlugAppArmor string
connectedPlugSecComp string
connectedPlugUDev []string
rejectAutoConnectPairs bool
connectedPlugUpdateNSAppArmor string
connectedPlugMount []osutil.MountEntry
connectedPlugKModModules []string
connectedSlotKModModules []string
permanentPlugKModModules []string
permanentSlotKModModules []string
usesPtraceTrace bool
suppressPtraceTrace bool
suppressHomeIx bool
controlsDeviceCgroup bool
serviceSnippets []string
}
// Name returns the interface name.
func (iface *commonInterface) Name() string {
return iface.name
}
// StaticInfo returns various meta-data about this interface.
func (iface *commonInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: iface.summary,
DocURL: iface.docURL,
ImplicitOnCore: iface.implicitOnCore,
ImplicitOnClassic: iface.implicitOnClassic,
BaseDeclarationPlugs: iface.baseDeclarationPlugs,
BaseDeclarationSlots: iface.baseDeclarationSlots,
}
}
func (iface *commonInterface) ServicePermanentPlug(plug *snap.PlugInfo) []string {
return iface.serviceSnippets
}
func (iface *commonInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
if iface.usesPtraceTrace {
spec.SetUsesPtraceTrace()
} else if iface.suppressPtraceTrace {
spec.SetSuppressPtraceTrace()
}
if iface.suppressHomeIx {
spec.SetSuppressHomeIx()
}
if snippet := iface.connectedPlugAppArmor; snippet != "" {
spec.AddSnippet(snippet)
}
if snippet := iface.connectedPlugUpdateNSAppArmor; snippet != "" {
spec.AddUpdateNS(snippet)
}
return nil
}
// AutoConnect returns whether plug and slot should be implicitly
// auto-connected assuming they will be an unambiguous connection
// candidate and declaration-based checks allow.
//
// By default we allow what declarations allowed.
func (iface *commonInterface) AutoConnect(*snap.PlugInfo, *snap.SlotInfo) bool {
return !iface.rejectAutoConnectPairs
}
func (iface *commonInterface) KModConnectedPlug(spec *kmod.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
for _, m := range iface.connectedPlugKModModules {
if err := spec.AddModule(m); err != nil {
return err
}
}
return nil
}
func (iface *commonInterface) KModConnectedSlot(spec *kmod.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
for _, m := range iface.connectedSlotKModModules {
if err := spec.AddModule(m); err != nil {
return err
}
}
return nil
}
func (iface *commonInterface) MountConnectedPlug(spec *mount.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
for _, entry := range iface.connectedPlugMount {
if err := spec.AddMountEntry(entry); err != nil {
return err
}
}
return nil
}
func (iface *commonInterface) KModPermanentPlug(spec *kmod.Specification, plug *snap.PlugInfo) error {
for _, m := range iface.permanentPlugKModModules {
if err := spec.AddModule(m); err != nil {
return err
}
}
return nil
}
func (iface *commonInterface) KModPermanentSlot(spec *kmod.Specification, slot *snap.SlotInfo) error {
for _, m := range iface.permanentSlotKModModules {
if err := spec.AddModule(m); err != nil {
return err
}
}
return nil
}
func (iface *commonInterface) SecCompConnectedPlug(spec *seccomp.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
if iface.connectedPlugSecComp != "" {
spec.AddSnippet(iface.connectedPlugSecComp)
}
return nil
}
func (iface *commonInterface) UDevConnectedPlug(spec *udev.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
// don't tag devices if the interface controls it's own device cgroup
if iface.controlsDeviceCgroup {
spec.SetControlsDeviceCgroup()
} else {
for _, rule := range iface.connectedPlugUDev {
spec.TagDevice(rule)
}
}
return nil
}