// btrfs ioctl executor
func ioctlSnapshotExecute(c *subvolSnapshot) error {
fi, err := os.Stat(c.dest)
if err == nil && !fi.IsDir() {
return fmt.Errorf("'%s' exists and it is not a directory", c.dest)
}
var newname, dest string
if err == nil && fi.IsDir() {
dest = c.dest
newname = filepath.Base(c.src)
} else {
dest = filepath.Dir(c.dest)
newname = filepath.Base(c.dest)
}
if subvol, err := ioctl.TestIsSubvolume(c.src); err != nil {
return err
} else if !subvol {
return c.error(fmt.Errorf("'%s' is not a subvolume", newname))
}
err = validators.ValidSubvolumeName(newname)
if err != nil {
return err
}
err = ioctl.SubvolSnapshot(c.readOnly, c.src, dest, newname)
if err != nil {
return err
}
return nil
}
func (c *subvolCreate) validate() error {
if len(c.dest) == 0 {
return errors.New("destination is empty")
}
name := filepath.Base(c.dest)
err := validators.ValidSubvolumeName(name)
if err != nil {
return err
}
fi, err := os.Stat(c.dest)
if err == nil && fi.IsDir() {
return fmt.Errorf("'%s' exists", c.dest)
}
return nil
}