summaryrefslogtreecommitdiff
path: root/vendor/github.com/Microsoft/hcsshim/errors.go
blob: 63efa23c7a4e8eb4d6517c98139dfa34761bcf0b (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
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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
package hcsshim

import (
	"fmt"
	"syscall"

	"github.com/Microsoft/hcsshim/internal/hns"

	"github.com/Microsoft/hcsshim/internal/hcs"
	"github.com/Microsoft/hcsshim/internal/hcserror"
)

var (
	// ErrComputeSystemDoesNotExist is an error encountered when the container being operated on no longer exists = hcs.exist
	ErrComputeSystemDoesNotExist = hcs.ErrComputeSystemDoesNotExist

	// ErrElementNotFound is an error encountered when the object being referenced does not exist
	ErrElementNotFound = hcs.ErrElementNotFound

	// ErrElementNotFound is an error encountered when the object being referenced does not exist
	ErrNotSupported = hcs.ErrNotSupported

	// ErrInvalidData is an error encountered when the request being sent to hcs is invalid/unsupported
	// decimal -2147024883 / hex 0x8007000d
	ErrInvalidData = hcs.ErrInvalidData

	// ErrHandleClose is an error encountered when the handle generating the notification being waited on has been closed
	ErrHandleClose = hcs.ErrHandleClose

	// ErrAlreadyClosed is an error encountered when using a handle that has been closed by the Close method
	ErrAlreadyClosed = hcs.ErrAlreadyClosed

	// ErrInvalidNotificationType is an error encountered when an invalid notification type is used
	ErrInvalidNotificationType = hcs.ErrInvalidNotificationType

	// ErrInvalidProcessState is an error encountered when the process is not in a valid state for the requested operation
	ErrInvalidProcessState = hcs.ErrInvalidProcessState

	// ErrTimeout is an error encountered when waiting on a notification times out
	ErrTimeout = hcs.ErrTimeout

	// ErrUnexpectedContainerExit is the error encountered when a container exits while waiting for
	// a different expected notification
	ErrUnexpectedContainerExit = hcs.ErrUnexpectedContainerExit

	// ErrUnexpectedProcessAbort is the error encountered when communication with the compute service
	// is lost while waiting for a notification
	ErrUnexpectedProcessAbort = hcs.ErrUnexpectedProcessAbort

	// ErrUnexpectedValue is an error encountered when hcs returns an invalid value
	ErrUnexpectedValue = hcs.ErrUnexpectedValue

	// ErrVmcomputeAlreadyStopped is an error encountered when a shutdown or terminate request is made on a stopped container
	ErrVmcomputeAlreadyStopped = hcs.ErrVmcomputeAlreadyStopped

	// ErrVmcomputeOperationPending is an error encountered when the operation is being completed asynchronously
	ErrVmcomputeOperationPending = hcs.ErrVmcomputeOperationPending

	// ErrVmcomputeOperationInvalidState is an error encountered when the compute system is not in a valid state for the requested operation
	ErrVmcomputeOperationInvalidState = hcs.ErrVmcomputeOperationInvalidState

	// ErrProcNotFound is an error encountered when the the process cannot be found
	ErrProcNotFound = hcs.ErrProcNotFound

	// ErrVmcomputeOperationAccessIsDenied is an error which can be encountered when enumerating compute systems in RS1/RS2
	// builds when the underlying silo might be in the process of terminating. HCS was fixed in RS3.
	ErrVmcomputeOperationAccessIsDenied = hcs.ErrVmcomputeOperationAccessIsDenied

	// ErrVmcomputeInvalidJSON is an error encountered when the compute system does not support/understand the messages sent by management
	ErrVmcomputeInvalidJSON = hcs.ErrVmcomputeInvalidJSON

	// ErrVmcomputeUnknownMessage is an error encountered guest compute system doesn't support the message
	ErrVmcomputeUnknownMessage = hcs.ErrVmcomputeUnknownMessage

	// ErrNotSupported is an error encountered when hcs doesn't support the request
	ErrPlatformNotSupported = hcs.ErrPlatformNotSupported
)

type EndpointNotFoundError = hns.EndpointNotFoundError
type NetworkNotFoundError = hns.NetworkNotFoundError

// ProcessError is an error encountered in HCS during an operation on a Process object
type ProcessError struct {
	Process   *process
	Operation string
	ExtraInfo string
	Err       error
	Events    []hcs.ErrorEvent
}

// ContainerError is an error encountered in HCS during an operation on a Container object
type ContainerError struct {
	Container *container
	Operation string
	ExtraInfo string
	Err       error
	Events    []hcs.ErrorEvent
}

func (e *ContainerError) Error() string {
	if e == nil {
		return "<nil>"
	}

	if e.Container == nil {
		return "unexpected nil container for error: " + e.Err.Error()
	}

	s := "container " + e.Container.system.ID()

	if e.Operation != "" {
		s += " encountered an error during " + e.Operation
	}

	switch e.Err.(type) {
	case nil:
		break
	case syscall.Errno:
		s += fmt.Sprintf(": failure in a Windows system call: %s (0x%x)", e.Err, hcserror.Win32FromError(e.Err))
	default:
		s += fmt.Sprintf(": %s", e.Err.Error())
	}

	for _, ev := range e.Events {
		s += "\n" + ev.String()
	}

	if e.ExtraInfo != "" {
		s += " extra info: " + e.ExtraInfo
	}

	return s
}

func makeContainerError(container *container, operation string, extraInfo string, err error) error {
	// Don't double wrap errors
	if _, ok := err.(*ContainerError); ok {
		return err
	}
	containerError := &ContainerError{Container: container, Operation: operation, ExtraInfo: extraInfo, Err: err}
	return containerError
}

func (e *ProcessError) Error() string {
	if e == nil {
		return "<nil>"
	}

	if e.Process == nil {
		return "Unexpected nil process for error: " + e.Err.Error()
	}

	s := fmt.Sprintf("process %d in container %s", e.Process.p.Pid(), e.Process.p.SystemID())
	if e.Operation != "" {
		s += " encountered an error during " + e.Operation
	}

	switch e.Err.(type) {
	case nil:
		break
	case syscall.Errno:
		s += fmt.Sprintf(": failure in a Windows system call: %s (0x%x)", e.Err, hcserror.Win32FromError(e.Err))
	default:
		s += fmt.Sprintf(": %s", e.Err.Error())
	}

	for _, ev := range e.Events {
		s += "\n" + ev.String()
	}

	return s
}

func makeProcessError(process *process, operation string, extraInfo string, err error) error {
	// Don't double wrap errors
	if _, ok := err.(*ProcessError); ok {
		return err
	}
	processError := &ProcessError{Process: process, Operation: operation, ExtraInfo: extraInfo, Err: err}
	return processError
}

// IsNotExist checks if an error is caused by the Container or Process not existing.
// Note: Currently, ErrElementNotFound can mean that a Process has either
// already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
func IsNotExist(err error) bool {
	if _, ok := err.(EndpointNotFoundError); ok {
		return true
	}
	if _, ok := err.(NetworkNotFoundError); ok {
		return true
	}
	return hcs.IsNotExist(getInnerError(err))
}

// IsAlreadyClosed checks if an error is caused by the Container or Process having been
// already closed by a call to the Close() method.
func IsAlreadyClosed(err error) bool {
	return hcs.IsAlreadyClosed(getInnerError(err))
}

// IsPending returns a boolean indicating whether the error is that
// the requested operation is being completed in the background.
func IsPending(err error) bool {
	return hcs.IsPending(getInnerError(err))
}

// IsTimeout returns a boolean indicating whether the error is caused by
// a timeout waiting for the operation to complete.
func IsTimeout(err error) bool {
	return hcs.IsTimeout(getInnerError(err))
}

// IsAlreadyStopped returns a boolean indicating whether the error is caused by
// a Container or Process being already stopped.
// Note: Currently, ErrElementNotFound can mean that a Process has either
// already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
func IsAlreadyStopped(err error) bool {
	return hcs.IsAlreadyStopped(getInnerError(err))
}

// IsNotSupported returns a boolean indicating whether the error is caused by
// unsupported platform requests
// Note: Currently Unsupported platform requests can be mean either
// ErrVmcomputeInvalidJSON, ErrInvalidData, ErrNotSupported or ErrVmcomputeUnknownMessage
// is thrown from the Platform
func IsNotSupported(err error) bool {
	return hcs.IsNotSupported(getInnerError(err))
}

func getInnerError(err error) error {
	switch pe := err.(type) {
	case nil:
		return nil
	case *ContainerError:
		err = pe.Err
	case *ProcessError:
		err = pe.Err
	}
	return err
}

func convertSystemError(err error, c *container) error {
	if serr, ok := err.(*hcs.SystemError); ok {
		return &ContainerError{Container: c, Operation: serr.Op, ExtraInfo: serr.Extra, Err: serr.Err, Events: serr.Events}
	}
	return err
}

func convertProcessError(err error, p *process) error {
	if perr, ok := err.(*hcs.ProcessError); ok {
		return &ProcessError{Process: p, Operation: perr.Op, Err: perr.Err, Events: perr.Events}
	}
	return err
}