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vm.go
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vm.go
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package fsstorer
import (
"encoding/gob"
"net"
"os"
"path/filepath"
"github.com/Symantec/Dominator/lib/fsutil"
proto "github.com/Symantec/Dominator/proto/hypervisor"
)
func (s *Storer) deleteVm(hypervisor net.IP, ipAddr string) error {
if dirname, err := s.getVmDirname(hypervisor, ipAddr); err != nil {
return err
} else {
return os.RemoveAll(dirname)
}
}
func (s *Storer) getNetHypervisorDirectory(hypervisor net.IP) (string, error) {
hypervisorIP, err := netIpToIp(hypervisor)
if err != nil {
return "", err
}
return s.getHypervisorDirectory(hypervisorIP), nil
}
func (s *Storer) getVmDirname(hypervisor net.IP,
ipAddr string) (string, error) {
if hDirname, err := s.getNetHypervisorDirectory(hypervisor); err != nil {
return "", err
} else {
return filepath.Join(hDirname, "VMs", ipAddr), nil
}
}
func (s *Storer) listVMs(hypervisor net.IP) ([]string, error) {
if hDirname, err := s.getNetHypervisorDirectory(hypervisor); err != nil {
return nil, err
} else {
return fsutil.ReadDirnames(filepath.Join(hDirname, "VMs"), true)
}
}
func (s *Storer) readVm(hypervisor net.IP,
ipAddr string) (*proto.VmInfo, error) {
if dirname, err := s.getVmDirname(hypervisor, ipAddr); err != nil {
return nil, err
} else {
filename := filepath.Join(dirname, "info.gob")
if file, err := os.Open(filename); err != nil {
return nil, err
} else {
defer file.Close()
decoder := gob.NewDecoder(file)
var vmInfo proto.VmInfo
if err := decoder.Decode(&vmInfo); err != nil {
return nil, err
}
return &vmInfo, nil
}
}
}
func (s *Storer) writeVm(hypervisor net.IP, ipAddr string,
vmInfo proto.VmInfo) error {
if dirname, err := s.getVmDirname(hypervisor, ipAddr); err != nil {
return err
} else {
if err := os.MkdirAll(dirname, dirPerms); err != nil {
return err
}
filename := filepath.Join(dirname, "info.gob")
writer, err := fsutil.CreateRenamingWriter(filename, filePerms)
if err != nil {
return err
} else {
defer writer.Close()
encoder := gob.NewEncoder(writer)
if err := encoder.Encode(vmInfo); err != nil {
writer.Abort()
return err
}
return writer.Close()
}
}
}