github.com/giuseppe/storage@v1.12.13/drivers/zfs/zfs_freebsd.go (about)

     1  package zfs
     2  
     3  import (
     4  	"fmt"
     5  	"strings"
     6  
     7  	"github.com/containers/storage/drivers"
     8  	"github.com/pkg/errors"
     9  	"github.com/sirupsen/logrus"
    10  	"golang.org/x/sys/unix"
    11  )
    12  
    13  func checkRootdirFs(rootdir string) error {
    14  	var buf unix.Statfs_t
    15  	if err := unix.Statfs(rootdir, &buf); err != nil {
    16  		return fmt.Errorf("Failed to access '%s': %s", rootdir, err)
    17  	}
    18  
    19  	// on FreeBSD buf.Fstypename contains ['z', 'f', 's', 0 ... ]
    20  	if (buf.Fstypename[0] != 122) || (buf.Fstypename[1] != 102) || (buf.Fstypename[2] != 115) || (buf.Fstypename[3] != 0) {
    21  		logrus.WithField("storage-driver", "zfs").Debugf("no zfs dataset found for rootdir '%s'", rootdir)
    22  		return errors.Wrapf(graphdriver.ErrPrerequisites, "no zfs dataset found for rootdir '%s'", rootdir)
    23  	}
    24  
    25  	return nil
    26  }
    27  
    28  func getMountpoint(id string) string {
    29  	maxlen := 12
    30  
    31  	// we need to preserve filesystem suffix
    32  	suffix := strings.SplitN(id, "-", 2)
    33  
    34  	if len(suffix) > 1 {
    35  		return id[:maxlen] + "-" + suffix[1]
    36  	}
    37  
    38  	return id[:maxlen]
    39  }