mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
800 lines
25 KiB
Go
800 lines
25 KiB
Go
package hcsshim
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import (
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"encoding/json"
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"fmt"
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"os"
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"sync"
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"syscall"
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"time"
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"github.com/sirupsen/logrus"
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)
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var (
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defaultTimeout = time.Minute * 4
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)
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const (
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pendingUpdatesQuery = `{ "PropertyTypes" : ["PendingUpdates"]}`
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statisticsQuery = `{ "PropertyTypes" : ["Statistics"]}`
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processListQuery = `{ "PropertyTypes" : ["ProcessList"]}`
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mappedVirtualDiskQuery = `{ "PropertyTypes" : ["MappedVirtualDisk"]}`
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)
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type container struct {
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handleLock sync.RWMutex
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handle hcsSystem
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id string
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callbackNumber uintptr
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}
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// ContainerProperties holds the properties for a container and the processes running in that container
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type ContainerProperties struct {
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ID string `json:"Id"`
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Name string
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SystemType string
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Owner string
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SiloGUID string `json:"SiloGuid,omitempty"`
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RuntimeID string `json:"RuntimeId,omitempty"`
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IsRuntimeTemplate bool `json:",omitempty"`
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RuntimeImagePath string `json:",omitempty"`
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Stopped bool `json:",omitempty"`
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ExitType string `json:",omitempty"`
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AreUpdatesPending bool `json:",omitempty"`
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ObRoot string `json:",omitempty"`
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Statistics Statistics `json:",omitempty"`
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ProcessList []ProcessListItem `json:",omitempty"`
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MappedVirtualDiskControllers map[int]MappedVirtualDiskController `json:",omitempty"`
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}
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// MemoryStats holds the memory statistics for a container
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type MemoryStats struct {
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UsageCommitBytes uint64 `json:"MemoryUsageCommitBytes,omitempty"`
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UsageCommitPeakBytes uint64 `json:"MemoryUsageCommitPeakBytes,omitempty"`
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UsagePrivateWorkingSetBytes uint64 `json:"MemoryUsagePrivateWorkingSetBytes,omitempty"`
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}
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// ProcessorStats holds the processor statistics for a container
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type ProcessorStats struct {
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TotalRuntime100ns uint64 `json:",omitempty"`
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RuntimeUser100ns uint64 `json:",omitempty"`
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RuntimeKernel100ns uint64 `json:",omitempty"`
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}
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// StorageStats holds the storage statistics for a container
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type StorageStats struct {
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ReadCountNormalized uint64 `json:",omitempty"`
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ReadSizeBytes uint64 `json:",omitempty"`
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WriteCountNormalized uint64 `json:",omitempty"`
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WriteSizeBytes uint64 `json:",omitempty"`
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}
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// NetworkStats holds the network statistics for a container
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type NetworkStats struct {
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BytesReceived uint64 `json:",omitempty"`
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BytesSent uint64 `json:",omitempty"`
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PacketsReceived uint64 `json:",omitempty"`
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PacketsSent uint64 `json:",omitempty"`
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DroppedPacketsIncoming uint64 `json:",omitempty"`
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DroppedPacketsOutgoing uint64 `json:",omitempty"`
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EndpointId string `json:",omitempty"`
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InstanceId string `json:",omitempty"`
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}
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// Statistics is the structure returned by a statistics call on a container
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type Statistics struct {
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Timestamp time.Time `json:",omitempty"`
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ContainerStartTime time.Time `json:",omitempty"`
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Uptime100ns uint64 `json:",omitempty"`
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Memory MemoryStats `json:",omitempty"`
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Processor ProcessorStats `json:",omitempty"`
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Storage StorageStats `json:",omitempty"`
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Network []NetworkStats `json:",omitempty"`
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}
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// ProcessList is the structure of an item returned by a ProcessList call on a container
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type ProcessListItem struct {
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CreateTimestamp time.Time `json:",omitempty"`
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ImageName string `json:",omitempty"`
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KernelTime100ns uint64 `json:",omitempty"`
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MemoryCommitBytes uint64 `json:",omitempty"`
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MemoryWorkingSetPrivateBytes uint64 `json:",omitempty"`
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MemoryWorkingSetSharedBytes uint64 `json:",omitempty"`
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ProcessId uint32 `json:",omitempty"`
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UserTime100ns uint64 `json:",omitempty"`
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}
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// MappedVirtualDiskController is the structure of an item returned by a MappedVirtualDiskList call on a container
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type MappedVirtualDiskController struct {
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MappedVirtualDisks map[int]MappedVirtualDisk `json:",omitempty"`
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}
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// Type of Request Support in ModifySystem
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type RequestType string
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// Type of Resource Support in ModifySystem
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type ResourceType string
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// RequestType const
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const (
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Add RequestType = "Add"
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Remove RequestType = "Remove"
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Network ResourceType = "Network"
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)
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// ResourceModificationRequestResponse is the structure used to send request to the container to modify the system
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// Supported resource types are Network and Request Types are Add/Remove
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type ResourceModificationRequestResponse struct {
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Resource ResourceType `json:"ResourceType"`
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Data interface{} `json:"Settings"`
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Request RequestType `json:"RequestType,omitempty"`
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}
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// createContainerAdditionalJSON is read from the environment at initialisation
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// time. It allows an environment variable to define additional JSON which
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// is merged in the CreateContainer call to HCS.
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var createContainerAdditionalJSON string
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func init() {
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createContainerAdditionalJSON = os.Getenv("HCSSHIM_CREATECONTAINER_ADDITIONALJSON")
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}
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// CreateContainer creates a new container with the given configuration but does not start it.
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func CreateContainer(id string, c *ContainerConfig) (Container, error) {
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return createContainerWithJSON(id, c, "")
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}
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// CreateContainerWithJSON creates a new container with the given configuration but does not start it.
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// It is identical to CreateContainer except that optional additional JSON can be merged before passing to HCS.
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func CreateContainerWithJSON(id string, c *ContainerConfig, additionalJSON string) (Container, error) {
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return createContainerWithJSON(id, c, additionalJSON)
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}
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func createContainerWithJSON(id string, c *ContainerConfig, additionalJSON string) (Container, error) {
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operation := "CreateContainer"
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title := "HCSShim::" + operation
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container := &container{
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id: id,
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}
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configurationb, err := json.Marshal(c)
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if err != nil {
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return nil, err
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}
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configuration := string(configurationb)
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logrus.Debugf(title+" id=%s config=%s", id, configuration)
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// Merge any additional JSON. Priority is given to what is passed in explicitly,
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// falling back to what's set in the environment.
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if additionalJSON == "" && createContainerAdditionalJSON != "" {
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additionalJSON = createContainerAdditionalJSON
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}
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if additionalJSON != "" {
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configurationMap := map[string]interface{}{}
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if err := json.Unmarshal([]byte(configuration), &configurationMap); err != nil {
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return nil, fmt.Errorf("failed to unmarshal %s: %s", configuration, err)
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}
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additionalMap := map[string]interface{}{}
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if err := json.Unmarshal([]byte(additionalJSON), &additionalMap); err != nil {
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return nil, fmt.Errorf("failed to unmarshal %s: %s", additionalJSON, err)
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}
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mergedMap := mergeMaps(additionalMap, configurationMap)
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mergedJSON, err := json.Marshal(mergedMap)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal merged configuration map %+v: %s", mergedMap, err)
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}
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configuration = string(mergedJSON)
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logrus.Debugf(title+" id=%s merged config=%s", id, configuration)
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}
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var (
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resultp *uint16
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identity syscall.Handle
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)
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createError := hcsCreateComputeSystem(id, configuration, identity, &container.handle, &resultp)
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if createError == nil || IsPending(createError) {
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if err := container.registerCallback(); err != nil {
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// Terminate the container if it still exists. We're okay to ignore a failure here.
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container.Terminate()
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return nil, makeContainerError(container, operation, "", err)
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}
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}
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err = processAsyncHcsResult(createError, resultp, container.callbackNumber, hcsNotificationSystemCreateCompleted, &defaultTimeout)
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if err != nil {
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if err == ErrTimeout {
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// Terminate the container if it still exists. We're okay to ignore a failure here.
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container.Terminate()
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}
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return nil, makeContainerError(container, operation, configuration, err)
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}
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logrus.Debugf(title+" succeeded id=%s handle=%d", id, container.handle)
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return container, nil
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}
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// mergeMaps recursively merges map `fromMap` into map `ToMap`. Any pre-existing values
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// in ToMap are overwritten. Values in fromMap are added to ToMap.
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// From http://stackoverflow.com/questions/40491438/merging-two-json-strings-in-golang
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func mergeMaps(fromMap, ToMap interface{}) interface{} {
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switch fromMap := fromMap.(type) {
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case map[string]interface{}:
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ToMap, ok := ToMap.(map[string]interface{})
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if !ok {
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return fromMap
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}
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for keyToMap, valueToMap := range ToMap {
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if valueFromMap, ok := fromMap[keyToMap]; ok {
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fromMap[keyToMap] = mergeMaps(valueFromMap, valueToMap)
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} else {
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fromMap[keyToMap] = valueToMap
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}
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}
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case nil:
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// merge(nil, map[string]interface{...}) -> map[string]interface{...}
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ToMap, ok := ToMap.(map[string]interface{})
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if ok {
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return ToMap
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}
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}
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return fromMap
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}
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// OpenContainer opens an existing container by ID.
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func OpenContainer(id string) (Container, error) {
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operation := "OpenContainer"
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title := "HCSShim::" + operation
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logrus.Debugf(title+" id=%s", id)
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container := &container{
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id: id,
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}
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var (
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handle hcsSystem
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resultp *uint16
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)
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err := hcsOpenComputeSystem(id, &handle, &resultp)
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err = processHcsResult(err, resultp)
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if err != nil {
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return nil, makeContainerError(container, operation, "", err)
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}
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container.handle = handle
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if err := container.registerCallback(); err != nil {
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return nil, makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s handle=%d", id, handle)
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return container, nil
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}
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// GetContainers gets a list of the containers on the system that match the query
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func GetContainers(q ComputeSystemQuery) ([]ContainerProperties, error) {
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operation := "GetContainers"
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title := "HCSShim::" + operation
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queryb, err := json.Marshal(q)
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if err != nil {
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return nil, err
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}
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query := string(queryb)
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logrus.Debugf(title+" query=%s", query)
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var (
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resultp *uint16
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computeSystemsp *uint16
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)
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err = hcsEnumerateComputeSystems(query, &computeSystemsp, &resultp)
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err = processHcsResult(err, resultp)
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if err != nil {
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return nil, err
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}
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if computeSystemsp == nil {
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return nil, ErrUnexpectedValue
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}
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computeSystemsRaw := convertAndFreeCoTaskMemBytes(computeSystemsp)
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computeSystems := []ContainerProperties{}
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if err := json.Unmarshal(computeSystemsRaw, &computeSystems); err != nil {
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return nil, err
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}
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logrus.Debugf(title + " succeeded")
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return computeSystems, nil
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}
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// Start synchronously starts the container.
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func (container *container) Start() error {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "Start"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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var resultp *uint16
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err := hcsStartComputeSystem(container.handle, "", &resultp)
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err = processAsyncHcsResult(err, resultp, container.callbackNumber, hcsNotificationSystemStartCompleted, &defaultTimeout)
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if err != nil {
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return makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return nil
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}
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// Shutdown requests a container shutdown, if IsPending() on the error returned is true,
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// it may not actually be shut down until Wait() succeeds.
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func (container *container) Shutdown() error {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "Shutdown"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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var resultp *uint16
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err := hcsShutdownComputeSystem(container.handle, "", &resultp)
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err = processHcsResult(err, resultp)
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if err != nil {
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return makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return nil
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}
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// Terminate requests a container terminate, if IsPending() on the error returned is true,
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// it may not actually be shut down until Wait() succeeds.
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func (container *container) Terminate() error {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "Terminate"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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var resultp *uint16
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err := hcsTerminateComputeSystem(container.handle, "", &resultp)
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err = processHcsResult(err, resultp)
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if err != nil {
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return makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return nil
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}
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// Wait synchronously waits for the container to shutdown or terminate.
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func (container *container) Wait() error {
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operation := "Wait"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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err := waitForNotification(container.callbackNumber, hcsNotificationSystemExited, nil)
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if err != nil {
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return makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return nil
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}
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// WaitTimeout synchronously waits for the container to terminate or the duration to elapse.
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// If the timeout expires, IsTimeout(err) == true
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func (container *container) WaitTimeout(timeout time.Duration) error {
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operation := "WaitTimeout"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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err := waitForNotification(container.callbackNumber, hcsNotificationSystemExited, &timeout)
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if err != nil {
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return makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return nil
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}
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func (container *container) properties(query string) (*ContainerProperties, error) {
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var (
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resultp *uint16
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propertiesp *uint16
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)
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err := hcsGetComputeSystemProperties(container.handle, query, &propertiesp, &resultp)
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err = processHcsResult(err, resultp)
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if err != nil {
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return nil, err
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}
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if propertiesp == nil {
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return nil, ErrUnexpectedValue
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}
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propertiesRaw := convertAndFreeCoTaskMemBytes(propertiesp)
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properties := &ContainerProperties{}
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if err := json.Unmarshal(propertiesRaw, properties); err != nil {
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return nil, err
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}
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return properties, nil
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}
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// HasPendingUpdates returns true if the container has updates pending to install
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func (container *container) HasPendingUpdates() (bool, error) {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "HasPendingUpdates"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return false, makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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properties, err := container.properties(pendingUpdatesQuery)
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if err != nil {
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return false, makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return properties.AreUpdatesPending, nil
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}
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// Statistics returns statistics for the container
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func (container *container) Statistics() (Statistics, error) {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "Statistics"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return Statistics{}, makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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properties, err := container.properties(statisticsQuery)
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if err != nil {
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return Statistics{}, makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return properties.Statistics, nil
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}
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// ProcessList returns an array of ProcessListItems for the container
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func (container *container) ProcessList() ([]ProcessListItem, error) {
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container.handleLock.RLock()
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defer container.handleLock.RUnlock()
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operation := "ProcessList"
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title := "HCSShim::Container::" + operation
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logrus.Debugf(title+" id=%s", container.id)
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if container.handle == 0 {
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return nil, makeContainerError(container, operation, "", ErrAlreadyClosed)
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}
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properties, err := container.properties(processListQuery)
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if err != nil {
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return nil, makeContainerError(container, operation, "", err)
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}
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logrus.Debugf(title+" succeeded id=%s", container.id)
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return properties.ProcessList, nil
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}
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// MappedVirtualDisks returns a map of the controllers and the disks mapped
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// to a container.
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//
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// Example of JSON returned by the query.
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//{
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// "Id":"1126e8d7d279c707a666972a15976371d365eaf622c02cea2c442b84f6f550a3_svm",
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// "SystemType":"Container",
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// "RuntimeOsType":"Linux",
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// "RuntimeId":"00000000-0000-0000-0000-000000000000",
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// "State":"Running",
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// "MappedVirtualDiskControllers":{
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// "0":{
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// "MappedVirtualDisks":{
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// "2":{
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// "HostPath":"C:\\lcow\\lcow\\scratch\\1126e8d7d279c707a666972a15976371d365eaf622c02cea2c442b84f6f550a3.vhdx",
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// "ContainerPath":"/mnt/gcs/LinuxServiceVM/scratch",
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// "Lun":2,
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// "CreateInUtilityVM":true
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// },
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// "3":{
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// "HostPath":"C:\\lcow\\lcow\\1126e8d7d279c707a666972a15976371d365eaf622c02cea2c442b84f6f550a3\\sandbox.vhdx",
|
|
// "Lun":3,
|
|
// "CreateInUtilityVM":true,
|
|
// "AttachOnly":true
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
//}
|
|
func (container *container) MappedVirtualDisks() (map[int]MappedVirtualDiskController, error) {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "MappedVirtualDiskList"
|
|
title := "HCSShim::Container::" + operation
|
|
logrus.Debugf(title+" id=%s", container.id)
|
|
|
|
if container.handle == 0 {
|
|
return nil, makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
properties, err := container.properties(mappedVirtualDiskQuery)
|
|
if err != nil {
|
|
return nil, makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
logrus.Debugf(title+" succeeded id=%s", container.id)
|
|
return properties.MappedVirtualDiskControllers, nil
|
|
}
|
|
|
|
// Pause pauses the execution of the container. This feature is not enabled in TP5.
|
|
func (container *container) Pause() error {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "Pause"
|
|
title := "HCSShim::Container::" + operation
|
|
logrus.Debugf(title+" id=%s", container.id)
|
|
|
|
if container.handle == 0 {
|
|
return makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
var resultp *uint16
|
|
err := hcsPauseComputeSystem(container.handle, "", &resultp)
|
|
err = processAsyncHcsResult(err, resultp, container.callbackNumber, hcsNotificationSystemPauseCompleted, &defaultTimeout)
|
|
if err != nil {
|
|
return makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
logrus.Debugf(title+" succeeded id=%s", container.id)
|
|
return nil
|
|
}
|
|
|
|
// Resume resumes the execution of the container. This feature is not enabled in TP5.
|
|
func (container *container) Resume() error {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "Resume"
|
|
title := "HCSShim::Container::" + operation
|
|
logrus.Debugf(title+" id=%s", container.id)
|
|
|
|
if container.handle == 0 {
|
|
return makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
var resultp *uint16
|
|
err := hcsResumeComputeSystem(container.handle, "", &resultp)
|
|
err = processAsyncHcsResult(err, resultp, container.callbackNumber, hcsNotificationSystemResumeCompleted, &defaultTimeout)
|
|
if err != nil {
|
|
return makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
logrus.Debugf(title+" succeeded id=%s", container.id)
|
|
return nil
|
|
}
|
|
|
|
// CreateProcess launches a new process within the container.
|
|
func (container *container) CreateProcess(c *ProcessConfig) (Process, error) {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "CreateProcess"
|
|
title := "HCSShim::Container::" + operation
|
|
var (
|
|
processInfo hcsProcessInformation
|
|
processHandle hcsProcess
|
|
resultp *uint16
|
|
)
|
|
|
|
if container.handle == 0 {
|
|
return nil, makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
// If we are not emulating a console, ignore any console size passed to us
|
|
if !c.EmulateConsole {
|
|
c.ConsoleSize[0] = 0
|
|
c.ConsoleSize[1] = 0
|
|
}
|
|
|
|
configurationb, err := json.Marshal(c)
|
|
if err != nil {
|
|
return nil, makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
configuration := string(configurationb)
|
|
logrus.Debugf(title+" id=%s config=%s", container.id, configuration)
|
|
|
|
err = hcsCreateProcess(container.handle, configuration, &processInfo, &processHandle, &resultp)
|
|
err = processHcsResult(err, resultp)
|
|
if err != nil {
|
|
return nil, makeContainerError(container, operation, configuration, err)
|
|
}
|
|
|
|
process := &process{
|
|
handle: processHandle,
|
|
processID: int(processInfo.ProcessId),
|
|
container: container,
|
|
cachedPipes: &cachedPipes{
|
|
stdIn: processInfo.StdInput,
|
|
stdOut: processInfo.StdOutput,
|
|
stdErr: processInfo.StdError,
|
|
},
|
|
}
|
|
|
|
if err := process.registerCallback(); err != nil {
|
|
return nil, makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
logrus.Debugf(title+" succeeded id=%s processid=%d", container.id, process.processID)
|
|
return process, nil
|
|
}
|
|
|
|
// OpenProcess gets an interface to an existing process within the container.
|
|
func (container *container) OpenProcess(pid int) (Process, error) {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "OpenProcess"
|
|
title := "HCSShim::Container::" + operation
|
|
logrus.Debugf(title+" id=%s, processid=%d", container.id, pid)
|
|
var (
|
|
processHandle hcsProcess
|
|
resultp *uint16
|
|
)
|
|
|
|
if container.handle == 0 {
|
|
return nil, makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
err := hcsOpenProcess(container.handle, uint32(pid), &processHandle, &resultp)
|
|
err = processHcsResult(err, resultp)
|
|
if err != nil {
|
|
return nil, makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
process := &process{
|
|
handle: processHandle,
|
|
processID: pid,
|
|
container: container,
|
|
}
|
|
|
|
if err := process.registerCallback(); err != nil {
|
|
return nil, makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
logrus.Debugf(title+" succeeded id=%s processid=%s", container.id, process.processID)
|
|
return process, nil
|
|
}
|
|
|
|
// Close cleans up any state associated with the container but does not terminate or wait for it.
|
|
func (container *container) Close() error {
|
|
container.handleLock.Lock()
|
|
defer container.handleLock.Unlock()
|
|
operation := "Close"
|
|
title := "HCSShim::Container::" + operation
|
|
logrus.Debugf(title+" id=%s", container.id)
|
|
|
|
// Don't double free this
|
|
if container.handle == 0 {
|
|
return nil
|
|
}
|
|
|
|
if err := container.unregisterCallback(); err != nil {
|
|
return makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
if err := hcsCloseComputeSystem(container.handle); err != nil {
|
|
return makeContainerError(container, operation, "", err)
|
|
}
|
|
|
|
container.handle = 0
|
|
|
|
logrus.Debugf(title+" succeeded id=%s", container.id)
|
|
return nil
|
|
}
|
|
|
|
func (container *container) registerCallback() error {
|
|
context := ¬ifcationWatcherContext{
|
|
channels: newChannels(),
|
|
}
|
|
|
|
callbackMapLock.Lock()
|
|
callbackNumber := nextCallback
|
|
nextCallback++
|
|
callbackMap[callbackNumber] = context
|
|
callbackMapLock.Unlock()
|
|
|
|
var callbackHandle hcsCallback
|
|
err := hcsRegisterComputeSystemCallback(container.handle, notificationWatcherCallback, callbackNumber, &callbackHandle)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
context.handle = callbackHandle
|
|
container.callbackNumber = callbackNumber
|
|
|
|
return nil
|
|
}
|
|
|
|
func (container *container) unregisterCallback() error {
|
|
callbackNumber := container.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
|
|
}
|
|
|
|
// Modifies the System by sending a request to HCS
|
|
func (container *container) Modify(config *ResourceModificationRequestResponse) error {
|
|
container.handleLock.RLock()
|
|
defer container.handleLock.RUnlock()
|
|
operation := "Modify"
|
|
title := "HCSShim::Container::" + operation
|
|
|
|
if container.handle == 0 {
|
|
return makeContainerError(container, operation, "", ErrAlreadyClosed)
|
|
}
|
|
|
|
requestJSON, err := json.Marshal(config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
requestString := string(requestJSON)
|
|
logrus.Debugf(title+" id=%s request=%s", container.id, requestString)
|
|
|
|
var resultp *uint16
|
|
err = hcsModifyComputeSystem(container.handle, requestString, &resultp)
|
|
err = processHcsResult(err, resultp)
|
|
if err != nil {
|
|
return makeContainerError(container, operation, "", err)
|
|
}
|
|
logrus.Debugf(title+" succeeded id=%s", container.id)
|
|
return nil
|
|
}
|