github.com/vieux/docker@v0.6.3-0.20161004191708-e097c2a938c7/daemon/graphdriver/driver_solaris.go (about)

     1  // +build solaris,cgo
     2  
     3  package graphdriver
     4  
     5  /*
     6  #include <sys/statvfs.h>
     7  #include <stdlib.h>
     8  
     9  static inline struct statvfs *getstatfs(char *s) {
    10          struct statvfs *buf;
    11          int err;
    12          buf = (struct statvfs *)malloc(sizeof(struct statvfs));
    13          err = statvfs(s, buf);
    14          return buf;
    15  }
    16  */
    17  import "C"
    18  import (
    19  	"path/filepath"
    20  	"unsafe"
    21  
    22  	"github.com/Sirupsen/logrus"
    23  )
    24  
    25  const (
    26  	// FsMagicZfs filesystem id for Zfs
    27  	FsMagicZfs = FsMagic(0x2fc12fc1)
    28  )
    29  
    30  var (
    31  	// Slice of drivers that should be used in an order
    32  	priority = []string{
    33  		"zfs",
    34  	}
    35  
    36  	// FsNames maps filesystem id to name of the filesystem.
    37  	FsNames = map[FsMagic]string{
    38  		FsMagicZfs: "zfs",
    39  	}
    40  )
    41  
    42  // GetFSMagic returns the filesystem id given the path.
    43  func GetFSMagic(rootpath string) (FsMagic, error) {
    44  	return 0, nil
    45  }
    46  
    47  // Mounted checks if the given path is mounted as the fs type
    48  //Solaris supports only ZFS for now
    49  func Mounted(fsType FsMagic, mountPath string) (bool, error) {
    50  
    51  	cs := C.CString(filepath.Dir(mountPath))
    52  	buf := C.getstatfs(cs)
    53  
    54  	// on Solaris buf.f_basetype contains ['z', 'f', 's', 0 ... ]
    55  	if (buf.f_basetype[0] != 122) || (buf.f_basetype[1] != 102) || (buf.f_basetype[2] != 115) ||
    56  		(buf.f_basetype[3] != 0) {
    57  		logrus.Debugf("[zfs] no zfs dataset found for rootdir '%s'", mountPath)
    58  		C.free(unsafe.Pointer(buf))
    59  		return false, ErrPrerequisites
    60  	}
    61  
    62  	C.free(unsafe.Pointer(buf))
    63  	C.free(unsafe.Pointer(cs))
    64  	return true, nil
    65  }