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cdrom.go
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cdrom.go
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package machines
import (
"context"
"fmt"
"strings"
pb "github.com/0xef53/kvmrun/api/services/machines/v1"
"github.com/0xef53/kvmrun/kvmrun"
empty "github.com/golang/protobuf/ptypes/empty"
log "github.com/sirupsen/logrus"
)
func (s *ServiceServer) AttachCdrom(ctx context.Context, req *pb.AttachCdromRequest) (*empty.Empty, error) {
cdrom, err := kvmrun.NewCdrom(req.DeviceName, req.DeviceMedia)
if err != nil {
return nil, err
}
cdrom.Driver = strings.ReplaceAll(strings.ToLower(req.Driver.String()), "_", "-")
cdrom.ReadOnly = req.ReadOnly
cdrom.Bootindex = uint(req.Bootindex)
if len(req.ProxyCommand) > 0 {
if v, err := resolveExecutable(req.ProxyCommand); err == nil {
req.ProxyCommand = v
} else {
return nil, err
}
}
taskKey := req.Name + ":cdrom_" + cdrom.Name + ":"
err = s.RunFuncTask(ctx, taskKey, func(l *log.Entry) error {
vm, err := s.GetMachine(req.Name)
if err != nil {
return err
}
if req.Live && vm.R != nil {
if req.Index >= 0 {
return fmt.Errorf("unable to set cdrom index in relation to the running QEMU instance")
}
if vm.R.GetCdroms().Exists(req.DeviceName) {
if len(req.ProxyCommand) > 0 {
return fmt.Errorf("cdrom is already connected, unable to add a proxy for it")
}
} else {
var success bool
if len(req.ProxyCommand) > 0 {
proxy := kvmrun.Proxy{
Path: req.DeviceMedia,
Command: req.ProxyCommand,
Envs: req.ProxyEnvs,
}
defer func() {
if !success {
vm.R.RemoveProxy(proxy.Path)
s.DeactivateDiskBackendProxy(req.Name, cdrom.Backend.BaseName())
}
}()
if err := vm.R.AppendProxy(proxy); err != nil {
return err
}
if err := s.ActivateDiskBackendProxy(req.Name, cdrom.Backend.BaseName()); err != nil {
return err
}
}
if err := vm.R.AppendCdrom(*cdrom); err != nil {
return err
}
success = true
}
}
addToConf := func() error {
// In the config file we are able to add a proxy server
// for an already connected cdrom
if len(req.ProxyCommand) > 0 {
proxy := kvmrun.Proxy{
Path: req.DeviceMedia,
Command: req.ProxyCommand,
Envs: req.ProxyEnvs,
}
if err := vm.C.AppendProxy(proxy); err != nil {
return err
}
}
if req.Index >= 0 {
return vm.C.InsertCdrom(*cdrom, int(req.Index))
}
return vm.C.AppendCdrom(*cdrom)
}
if err := addToConf(); err != nil && !kvmrun.IsAlreadyConnectedError(err) {
return err
}
return vm.C.Save()
})
if err != nil {
return nil, err
}
return new(empty.Empty), nil
}
func (s *ServiceServer) DetachCdrom(ctx context.Context, req *pb.DetachCdromRequest) (*empty.Empty, error) {
taskKey := req.Name + ":cdrom_" + req.DeviceName + ":"
err := s.RunFuncTask(ctx, taskKey, func(l *log.Entry) error {
vm, err := s.GetMachine(req.Name)
if err != nil {
return err
}
if req.Live && vm.R != nil {
if cdrom := vm.R.GetCdroms().Get(req.DeviceName); cdrom != nil {
if err := vm.R.RemoveCdrom(req.DeviceName); err != nil {
return err
}
if err := vm.R.RemoveProxy(cdrom.Media); err != nil && !kvmrun.IsNotConnectedError(err) {
return err
}
if err := s.DeactivateDiskBackendProxy(req.Name, cdrom.Backend.BaseName()); err != nil {
return err
}
}
}
if cdrom := vm.C.GetCdroms().Get(req.DeviceName); cdrom != nil {
if err := vm.C.RemoveCdrom(req.DeviceName); err != nil {
return err
}
if err := vm.C.RemoveProxy(cdrom.Media); err != nil && !kvmrun.IsNotConnectedError(err) {
return err
}
}
return vm.C.Save()
})
if err != nil {
return nil, err
}
return new(empty.Empty), nil
}
func (s *ServiceServer) ChangeCdromMedia(ctx context.Context, req *pb.ChangeCdromMediaRequest) (*empty.Empty, error) {
if len(req.ProxyCommand) > 0 {
if v, err := resolveExecutable(req.ProxyCommand); err == nil {
req.ProxyCommand = v
} else {
return nil, err
}
}
err := s.RunFuncTask(ctx, req.Name, func(l *log.Entry) error {
vm, err := s.GetMachine(req.Name)
if err != nil {
return err
}
var savingRequire bool
if req.Live && vm.R != nil {
if cdrom := vm.R.GetCdroms().Get(req.DeviceName); cdrom != nil {
if cdrom.Media != req.DeviceMedia {
var success bool
if len(req.ProxyCommand) > 0 {
// Configure proxy for new media
proxy := kvmrun.Proxy{
Path: req.DeviceMedia,
Command: req.ProxyCommand,
Envs: req.ProxyEnvs,
}
be, err := kvmrun.NewDiskBackend(req.DeviceMedia)
if err != nil {
return err
}
defer func() {
if !success {
vm.R.RemoveProxy(req.DeviceMedia)
s.DeactivateDiskBackendProxy(req.Name, be.BaseName())
}
}()
if err := vm.R.AppendProxy(proxy); err != nil {
return err
}
if err := s.ActivateDiskBackendProxy(req.Name, be.BaseName()); err != nil {
return err
}
}
oldMedia := cdrom.Media
oldMediaBaseName := cdrom.Backend.BaseName()
// Change media
if err := vm.R.ChangeCdromMedia(req.DeviceName, req.DeviceMedia); err != nil {
return err
}
success = true
// Deconfigure old media proxy
if err := vm.R.RemoveProxy(oldMedia); err != nil && !kvmrun.IsNotConnectedError(err) {
return err
}
if err := s.DeactivateDiskBackendProxy(req.Name, oldMediaBaseName); err != nil {
return err
}
}
} else {
return &kvmrun.NotConnectedError{"instance_qemu", req.DeviceName}
}
}
if cdrom := vm.C.GetCdroms().Get(req.DeviceName); cdrom != nil {
switch err := vm.C.ChangeCdromMedia(req.DeviceName, req.DeviceMedia); {
case err == nil:
savingRequire = true
case kvmrun.IsAlreadyConnectedError(err):
default:
return err
}
proxy := kvmrun.Proxy{
Path: req.DeviceMedia,
Command: req.ProxyCommand,
Envs: req.ProxyEnvs,
}
switch err := vm.C.AppendProxy(proxy); {
case err == nil:
savingRequire = true
case kvmrun.IsAlreadyConnectedError(err):
default:
return err
}
}
if savingRequire {
return vm.C.Save()
}
return nil
})
if err != nil {
return nil, err
}
return new(empty.Empty), nil
}