github.com/skanehira/moby@v17.12.1-ce-rc2+incompatible/pkg/loopback/loop_wrapper.go (about)

     1  // +build linux,cgo
     2  
     3  package loopback
     4  
     5  /*
     6  #include <linux/loop.h> // FIXME: present only for defines, maybe we can remove it?
     7  
     8  #ifndef LOOP_CTL_GET_FREE
     9    #define LOOP_CTL_GET_FREE 0x4C82
    10  #endif
    11  
    12  #ifndef LO_FLAGS_PARTSCAN
    13    #define LO_FLAGS_PARTSCAN 8
    14  #endif
    15  
    16  */
    17  import "C"
    18  
    19  type loopInfo64 struct {
    20  	loDevice         uint64 /* ioctl r/o */
    21  	loInode          uint64 /* ioctl r/o */
    22  	loRdevice        uint64 /* ioctl r/o */
    23  	loOffset         uint64
    24  	loSizelimit      uint64 /* bytes, 0 == max available */
    25  	loNumber         uint32 /* ioctl r/o */
    26  	loEncryptType    uint32
    27  	loEncryptKeySize uint32 /* ioctl w/o */
    28  	loFlags          uint32 /* ioctl r/o */
    29  	loFileName       [LoNameSize]uint8
    30  	loCryptName      [LoNameSize]uint8
    31  	loEncryptKey     [LoKeySize]uint8 /* ioctl w/o */
    32  	loInit           [2]uint64
    33  }
    34  
    35  // IOCTL consts
    36  const (
    37  	LoopSetFd       = C.LOOP_SET_FD
    38  	LoopCtlGetFree  = C.LOOP_CTL_GET_FREE
    39  	LoopGetStatus64 = C.LOOP_GET_STATUS64
    40  	LoopSetStatus64 = C.LOOP_SET_STATUS64
    41  	LoopClrFd       = C.LOOP_CLR_FD
    42  	LoopSetCapacity = C.LOOP_SET_CAPACITY
    43  )
    44  
    45  // LOOP consts.
    46  const (
    47  	LoFlagsAutoClear = C.LO_FLAGS_AUTOCLEAR
    48  	LoFlagsReadOnly  = C.LO_FLAGS_READ_ONLY
    49  	LoFlagsPartScan  = C.LO_FLAGS_PARTSCAN
    50  	LoKeySize        = C.LO_KEY_SIZE
    51  	LoNameSize       = C.LO_NAME_SIZE
    52  )