mirror of
https://gitea.com/Lydanne/buildx.git
synced 2025-07-09 21:17:09 +08:00
vendor: initial vendor
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
685
vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go
generated
vendored
Normal file
685
vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go
generated
vendored
Normal file
@ -0,0 +1,685 @@
|
||||
package hcs
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"os"
|
||||
"strconv"
|
||||
"sync"
|
||||
"syscall"
|
||||
"time"
|
||||
|
||||
"github.com/Microsoft/hcsshim/internal/interop"
|
||||
"github.com/Microsoft/hcsshim/internal/logfields"
|
||||
"github.com/Microsoft/hcsshim/internal/schema1"
|
||||
"github.com/Microsoft/hcsshim/internal/timeout"
|
||||
"github.com/sirupsen/logrus"
|
||||
)
|
||||
|
||||
// currentContainerStarts is used to limit the number of concurrent container
|
||||
// starts.
|
||||
var currentContainerStarts containerStarts
|
||||
|
||||
type containerStarts struct {
|
||||
maxParallel int
|
||||
inProgress int
|
||||
sync.Mutex
|
||||
}
|
||||
|
||||
func init() {
|
||||
mpsS := os.Getenv("HCSSHIM_MAX_PARALLEL_START")
|
||||
if len(mpsS) > 0 {
|
||||
mpsI, err := strconv.Atoi(mpsS)
|
||||
if err != nil || mpsI < 0 {
|
||||
return
|
||||
}
|
||||
currentContainerStarts.maxParallel = mpsI
|
||||
}
|
||||
}
|
||||
|
||||
type System struct {
|
||||
handleLock sync.RWMutex
|
||||
handle hcsSystem
|
||||
id string
|
||||
callbackNumber uintptr
|
||||
|
||||
logctx logrus.Fields
|
||||
}
|
||||
|
||||
func newSystem(id string) *System {
|
||||
return &System{
|
||||
id: id,
|
||||
logctx: logrus.Fields{
|
||||
logfields.ContainerID: id,
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func (computeSystem *System) logOperationBegin(operation string) {
|
||||
logOperationBegin(
|
||||
computeSystem.logctx,
|
||||
operation+" - Begin Operation")
|
||||
}
|
||||
|
||||
func (computeSystem *System) logOperationEnd(operation string, err error) {
|
||||
var result string
|
||||
if err == nil {
|
||||
result = "Success"
|
||||
} else {
|
||||
result = "Error"
|
||||
}
|
||||
|
||||
logOperationEnd(
|
||||
computeSystem.logctx,
|
||||
operation+" - End Operation - "+result,
|
||||
err)
|
||||
}
|
||||
|
||||
// CreateComputeSystem creates a new compute system with the given configuration but does not start it.
|
||||
func CreateComputeSystem(id string, hcsDocumentInterface interface{}) (_ *System, err error) {
|
||||
operation := "hcsshim::CreateComputeSystem"
|
||||
|
||||
computeSystem := newSystem(id)
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
hcsDocumentB, err := json.Marshal(hcsDocumentInterface)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
hcsDocument := string(hcsDocumentB)
|
||||
|
||||
logrus.WithFields(computeSystem.logctx).
|
||||
WithField(logfields.JSON, hcsDocument).
|
||||
Debug("HCS ComputeSystem Document")
|
||||
|
||||
var (
|
||||
resultp *uint16
|
||||
identity syscall.Handle
|
||||
createError error
|
||||
)
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
createError = hcsCreateComputeSystem(id, hcsDocument, identity, &computeSystem.handle, &resultp)
|
||||
})
|
||||
|
||||
if createError == nil || IsPending(createError) {
|
||||
if err = computeSystem.registerCallback(); err != nil {
|
||||
// Terminate the compute system if it still exists. We're okay to
|
||||
// ignore a failure here.
|
||||
computeSystem.Terminate()
|
||||
return nil, makeSystemError(computeSystem, operation, "", err, nil)
|
||||
}
|
||||
}
|
||||
|
||||
events, err := processAsyncHcsResult(createError, resultp, computeSystem.callbackNumber, hcsNotificationSystemCreateCompleted, &timeout.SystemCreate)
|
||||
if err != nil {
|
||||
if err == ErrTimeout {
|
||||
// Terminate the compute system if it still exists. We're okay to
|
||||
// ignore a failure here.
|
||||
computeSystem.Terminate()
|
||||
}
|
||||
return nil, makeSystemError(computeSystem, operation, hcsDocument, err, events)
|
||||
}
|
||||
|
||||
return computeSystem, nil
|
||||
}
|
||||
|
||||
// OpenComputeSystem opens an existing compute system by ID.
|
||||
func OpenComputeSystem(id string) (_ *System, err error) {
|
||||
operation := "hcsshim::OpenComputeSystem"
|
||||
|
||||
computeSystem := newSystem(id)
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() {
|
||||
if IsNotExist(err) {
|
||||
computeSystem.logOperationEnd(operation, nil)
|
||||
} else {
|
||||
computeSystem.logOperationEnd(operation, err)
|
||||
}
|
||||
}()
|
||||
|
||||
var (
|
||||
handle hcsSystem
|
||||
resultp *uint16
|
||||
)
|
||||
err = hcsOpenComputeSystem(id, &handle, &resultp)
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, operation, "", err, events)
|
||||
}
|
||||
|
||||
computeSystem.handle = handle
|
||||
|
||||
if err = computeSystem.registerCallback(); err != nil {
|
||||
return nil, makeSystemError(computeSystem, operation, "", err, nil)
|
||||
}
|
||||
|
||||
return computeSystem, nil
|
||||
}
|
||||
|
||||
// GetComputeSystems gets a list of the compute systems on the system that match the query
|
||||
func GetComputeSystems(q schema1.ComputeSystemQuery) (_ []schema1.ContainerProperties, err error) {
|
||||
operation := "hcsshim::GetComputeSystems"
|
||||
fields := logrus.Fields{}
|
||||
logOperationBegin(
|
||||
fields,
|
||||
operation+" - Begin Operation")
|
||||
|
||||
defer func() {
|
||||
var result string
|
||||
if err == nil {
|
||||
result = "Success"
|
||||
} else {
|
||||
result = "Error"
|
||||
}
|
||||
|
||||
logOperationEnd(
|
||||
fields,
|
||||
operation+" - End Operation - "+result,
|
||||
err)
|
||||
}()
|
||||
|
||||
queryb, err := json.Marshal(q)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
query := string(queryb)
|
||||
|
||||
logrus.WithFields(fields).
|
||||
WithField(logfields.JSON, query).
|
||||
Debug("HCS ComputeSystem Query")
|
||||
|
||||
var (
|
||||
resultp *uint16
|
||||
computeSystemsp *uint16
|
||||
)
|
||||
|
||||
syscallWatcher(fields, func() {
|
||||
err = hcsEnumerateComputeSystems(query, &computeSystemsp, &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return nil, &HcsError{Op: operation, Err: err, Events: events}
|
||||
}
|
||||
|
||||
if computeSystemsp == nil {
|
||||
return nil, ErrUnexpectedValue
|
||||
}
|
||||
computeSystemsRaw := interop.ConvertAndFreeCoTaskMemBytes(computeSystemsp)
|
||||
computeSystems := []schema1.ContainerProperties{}
|
||||
if err = json.Unmarshal(computeSystemsRaw, &computeSystems); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return computeSystems, nil
|
||||
}
|
||||
|
||||
// Start synchronously starts the computeSystem.
|
||||
func (computeSystem *System) Start() (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Start"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Start", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
// This is a very simple backoff-retry loop to limit the number
|
||||
// of parallel container starts if environment variable
|
||||
// HCSSHIM_MAX_PARALLEL_START is set to a positive integer.
|
||||
// It should generally only be used as a workaround to various
|
||||
// platform issues that exist between RS1 and RS4 as of Aug 2018
|
||||
if currentContainerStarts.maxParallel > 0 {
|
||||
for {
|
||||
currentContainerStarts.Lock()
|
||||
if currentContainerStarts.inProgress < currentContainerStarts.maxParallel {
|
||||
currentContainerStarts.inProgress++
|
||||
currentContainerStarts.Unlock()
|
||||
break
|
||||
}
|
||||
if currentContainerStarts.inProgress == currentContainerStarts.maxParallel {
|
||||
currentContainerStarts.Unlock()
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
}
|
||||
}
|
||||
// Make sure we decrement the count when we are done.
|
||||
defer func() {
|
||||
currentContainerStarts.Lock()
|
||||
currentContainerStarts.inProgress--
|
||||
currentContainerStarts.Unlock()
|
||||
}()
|
||||
}
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsStartComputeSystem(computeSystem.handle, "", &resultp)
|
||||
})
|
||||
events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemStartCompleted, &timeout.SystemStart)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Start", "", err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// ID returns the compute system's identifier.
|
||||
func (computeSystem *System) ID() string {
|
||||
return computeSystem.id
|
||||
}
|
||||
|
||||
// Shutdown requests a compute system shutdown, if IsPending() on the error returned is true,
|
||||
// it may not actually be shut down until Wait() succeeds.
|
||||
func (computeSystem *System) Shutdown() (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Shutdown"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() {
|
||||
if IsAlreadyStopped(err) {
|
||||
computeSystem.logOperationEnd(operation, nil)
|
||||
} else {
|
||||
computeSystem.logOperationEnd(operation, err)
|
||||
}
|
||||
}()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Shutdown", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsShutdownComputeSystem(computeSystem.handle, "", &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Shutdown", "", err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Terminate requests a compute system terminate, if IsPending() on the error returned is true,
|
||||
// it may not actually be shut down until Wait() succeeds.
|
||||
func (computeSystem *System) Terminate() (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Terminate"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() {
|
||||
if IsPending(err) {
|
||||
computeSystem.logOperationEnd(operation, nil)
|
||||
} else {
|
||||
computeSystem.logOperationEnd(operation, err)
|
||||
}
|
||||
}()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Terminate", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsTerminateComputeSystem(computeSystem.handle, "", &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil && err != ErrVmcomputeAlreadyStopped {
|
||||
return makeSystemError(computeSystem, "Terminate", "", err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Wait synchronously waits for the compute system to shutdown or terminate.
|
||||
func (computeSystem *System) Wait() (err error) {
|
||||
operation := "hcsshim::ComputeSystem::Wait"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, nil)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Wait", "", err, nil)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// WaitExpectedError synchronously waits for the compute system to shutdown or
|
||||
// terminate, and ignores the passed error if it occurs.
|
||||
func (computeSystem *System) WaitExpectedError(expected error) (err error) {
|
||||
operation := "hcsshim::ComputeSystem::WaitExpectedError"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, nil)
|
||||
if err != nil && getInnerError(err) != expected {
|
||||
return makeSystemError(computeSystem, "WaitExpectedError", "", err, nil)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// WaitTimeout synchronously waits for the compute system to terminate or the duration to elapse.
|
||||
// If the timeout expires, IsTimeout(err) == true
|
||||
func (computeSystem *System) WaitTimeout(timeout time.Duration) (err error) {
|
||||
operation := "hcsshim::ComputeSystem::WaitTimeout"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, &timeout)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "WaitTimeout", "", err, nil)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (computeSystem *System) Properties(types ...schema1.PropertyType) (_ *schema1.ContainerProperties, err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Properties"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
queryj, err := json.Marshal(schema1.PropertyQuery{types})
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, "Properties", "", err, nil)
|
||||
}
|
||||
|
||||
logrus.WithFields(computeSystem.logctx).
|
||||
WithField(logfields.JSON, queryj).
|
||||
Debug("HCS ComputeSystem Properties Query")
|
||||
|
||||
var resultp, propertiesp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsGetComputeSystemProperties(computeSystem.handle, string(queryj), &propertiesp, &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, "Properties", "", err, events)
|
||||
}
|
||||
|
||||
if propertiesp == nil {
|
||||
return nil, ErrUnexpectedValue
|
||||
}
|
||||
propertiesRaw := interop.ConvertAndFreeCoTaskMemBytes(propertiesp)
|
||||
properties := &schema1.ContainerProperties{}
|
||||
if err := json.Unmarshal(propertiesRaw, properties); err != nil {
|
||||
return nil, makeSystemError(computeSystem, "Properties", "", err, nil)
|
||||
}
|
||||
|
||||
return properties, nil
|
||||
}
|
||||
|
||||
// Pause pauses the execution of the computeSystem. This feature is not enabled in TP5.
|
||||
func (computeSystem *System) Pause() (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Pause"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Pause", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsPauseComputeSystem(computeSystem.handle, "", &resultp)
|
||||
})
|
||||
events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemPauseCompleted, &timeout.SystemPause)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Pause", "", err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Resume resumes the execution of the computeSystem. This feature is not enabled in TP5.
|
||||
func (computeSystem *System) Resume() (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Resume"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Resume", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsResumeComputeSystem(computeSystem.handle, "", &resultp)
|
||||
})
|
||||
events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemResumeCompleted, &timeout.SystemResume)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Resume", "", err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// CreateProcess launches a new process within the computeSystem.
|
||||
func (computeSystem *System) CreateProcess(c interface{}) (_ *Process, err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::CreateProcess"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
var (
|
||||
processInfo hcsProcessInformation
|
||||
processHandle hcsProcess
|
||||
resultp *uint16
|
||||
)
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return nil, makeSystemError(computeSystem, "CreateProcess", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
configurationb, err := json.Marshal(c)
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, "CreateProcess", "", err, nil)
|
||||
}
|
||||
|
||||
configuration := string(configurationb)
|
||||
|
||||
logrus.WithFields(computeSystem.logctx).
|
||||
WithField(logfields.JSON, configuration).
|
||||
Debug("HCS ComputeSystem Process Document")
|
||||
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsCreateProcess(computeSystem.handle, configuration, &processInfo, &processHandle, &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, "CreateProcess", configuration, err, events)
|
||||
}
|
||||
|
||||
logrus.WithFields(computeSystem.logctx).
|
||||
WithField(logfields.ProcessID, processInfo.ProcessId).
|
||||
Debug("HCS ComputeSystem CreateProcess PID")
|
||||
|
||||
process := newProcess(processHandle, int(processInfo.ProcessId), computeSystem)
|
||||
process.cachedPipes = &cachedPipes{
|
||||
stdIn: processInfo.StdInput,
|
||||
stdOut: processInfo.StdOutput,
|
||||
stdErr: processInfo.StdError,
|
||||
}
|
||||
|
||||
if err = process.registerCallback(); err != nil {
|
||||
return nil, makeSystemError(computeSystem, "CreateProcess", "", err, nil)
|
||||
}
|
||||
|
||||
return process, nil
|
||||
}
|
||||
|
||||
// OpenProcess gets an interface to an existing process within the computeSystem.
|
||||
func (computeSystem *System) OpenProcess(pid int) (_ *Process, err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
// Add PID for the context of this operation
|
||||
computeSystem.logctx[logfields.ProcessID] = pid
|
||||
defer delete(computeSystem.logctx, logfields.ProcessID)
|
||||
|
||||
operation := "hcsshim::ComputeSystem::OpenProcess"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
var (
|
||||
processHandle hcsProcess
|
||||
resultp *uint16
|
||||
)
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return nil, makeSystemError(computeSystem, "OpenProcess", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsOpenProcess(computeSystem.handle, uint32(pid), &processHandle, &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return nil, makeSystemError(computeSystem, "OpenProcess", "", err, events)
|
||||
}
|
||||
|
||||
process := newProcess(processHandle, pid, computeSystem)
|
||||
if err = process.registerCallback(); err != nil {
|
||||
return nil, makeSystemError(computeSystem, "OpenProcess", "", err, nil)
|
||||
}
|
||||
|
||||
return process, nil
|
||||
}
|
||||
|
||||
// Close cleans up any state associated with the compute system but does not terminate or wait for it.
|
||||
func (computeSystem *System) Close() (err error) {
|
||||
computeSystem.handleLock.Lock()
|
||||
defer computeSystem.handleLock.Unlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Close"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
// Don't double free this
|
||||
if computeSystem.handle == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
if err = computeSystem.unregisterCallback(); err != nil {
|
||||
return makeSystemError(computeSystem, "Close", "", err, nil)
|
||||
}
|
||||
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsCloseComputeSystem(computeSystem.handle)
|
||||
})
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Close", "", err, nil)
|
||||
}
|
||||
|
||||
computeSystem.handle = 0
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (computeSystem *System) registerCallback() error {
|
||||
context := ¬ifcationWatcherContext{
|
||||
channels: newChannels(),
|
||||
}
|
||||
|
||||
callbackMapLock.Lock()
|
||||
callbackNumber := nextCallback
|
||||
nextCallback++
|
||||
callbackMap[callbackNumber] = context
|
||||
callbackMapLock.Unlock()
|
||||
|
||||
var callbackHandle hcsCallback
|
||||
err := hcsRegisterComputeSystemCallback(computeSystem.handle, notificationWatcherCallback, callbackNumber, &callbackHandle)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
context.handle = callbackHandle
|
||||
computeSystem.callbackNumber = callbackNumber
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (computeSystem *System) unregisterCallback() error {
|
||||
callbackNumber := computeSystem.callbackNumber
|
||||
|
||||
callbackMapLock.RLock()
|
||||
context := callbackMap[callbackNumber]
|
||||
callbackMapLock.RUnlock()
|
||||
|
||||
if context == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
handle := context.handle
|
||||
|
||||
if handle == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
// hcsUnregisterComputeSystemCallback has its own syncronization
|
||||
// to wait for all callbacks to complete. We must NOT hold the callbackMapLock.
|
||||
err := hcsUnregisterComputeSystemCallback(handle)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
closeChannels(context.channels)
|
||||
|
||||
callbackMapLock.Lock()
|
||||
callbackMap[callbackNumber] = nil
|
||||
callbackMapLock.Unlock()
|
||||
|
||||
handle = 0
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Modify the System by sending a request to HCS
|
||||
func (computeSystem *System) Modify(config interface{}) (err error) {
|
||||
computeSystem.handleLock.RLock()
|
||||
defer computeSystem.handleLock.RUnlock()
|
||||
|
||||
operation := "hcsshim::ComputeSystem::Modify"
|
||||
computeSystem.logOperationBegin(operation)
|
||||
defer func() { computeSystem.logOperationEnd(operation, err) }()
|
||||
|
||||
if computeSystem.handle == 0 {
|
||||
return makeSystemError(computeSystem, "Modify", "", ErrAlreadyClosed, nil)
|
||||
}
|
||||
|
||||
requestJSON, err := json.Marshal(config)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
requestString := string(requestJSON)
|
||||
|
||||
logrus.WithFields(computeSystem.logctx).
|
||||
WithField(logfields.JSON, requestString).
|
||||
Debug("HCS ComputeSystem Modify Document")
|
||||
|
||||
var resultp *uint16
|
||||
syscallWatcher(computeSystem.logctx, func() {
|
||||
err = hcsModifyComputeSystem(computeSystem.handle, requestString, &resultp)
|
||||
})
|
||||
events := processHcsResult(resultp)
|
||||
if err != nil {
|
||||
return makeSystemError(computeSystem, "Modify", requestString, err, events)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
Reference in New Issue
Block a user