Documentation ¶
Index ¶
- Constants
- Variables
- func ActivateDevice(poolName string, name string, deviceId int, size uint64) error
- func AttachLoopDevice(sparseName string) (loop *os.File, err error)
- func BlockDeviceDiscard(path string) error
- func CookieSupported() bool
- func CreateDevice(poolName string, deviceId int) error
- func CreatePool(poolName string, dataFile, metadataFile *os.File, poolBlockSize uint32) error
- func CreateSnapDevice(poolName string, deviceId int, baseName string, baseDeviceId int) error
- func DeleteDevice(poolName string, deviceId int) error
- func DeviceIdExists(err error) bool
- func DevmapperLogCallback(level C.int, file *C.char, line C.int, dm_errno_or_class C.int, ...)
- func FindLoopDeviceFor(file *os.File) *os.File
- func GetBlockDeviceSize(file *os.File) (uint64, error)
- func GetDriverVersion() (string, error)
- func GetLibraryVersion() (string, error)
- func GetStatus(name string) (uint64, uint64, string, string, error)
- func LogInit(logger DevmapperLogger)
- func LogInitVerbose(level int)
- func LoopbackSetCapacity(file *os.File) error
- func ReloadPool(poolName string, dataFile, metadataFile *os.File, poolBlockSize uint32) error
- func RemoveDevice(name string) error
- func ResumeDevice(name string) error
- func SetDevDir(dir string) error
- func SetTransactionId(poolName string, oldId uint64, newId uint64) error
- func SuspendDevice(name string) error
- func UdevSetSyncSupport(enable bool) bool
- func UdevSyncSupported() bool
- func UdevWait(cookie uint) error
- type AddNodeType
- type CDmTask
- type CLoopInfo64
- type Deps
- type DevmapperLogger
- type Info
- type LoopInfo64
- type Task
- func (t *Task) AddTarget(start, size uint64, ttype, params string) error
- func (t *Task) GetDeps() (*Deps, error)
- func (t *Task) GetDriverVersion() (string, error)
- func (t *Task) GetInfo() (*Info, error)
- func (t *Task) GetNextTarget(next uintptr) (nextPtr uintptr, start uint64, length uint64, targetType string, params string)
- func (t *Task) Run() error
- func (t *Task) SetAddNode(addNode AddNodeType) error
- func (t *Task) SetCookie(cookie *uint, flags uint16) error
- func (t *Task) SetMessage(message string) error
- func (t *Task) SetName(name string) error
- func (t *Task) SetRo() error
- func (t *Task) SetSector(sector uint64) error
- type TaskType
Constants ¶
const ( BlkGetSize64 = C.BLKGETSIZE64 BlkDiscard = C.BLKDISCARD LoopSetFd = C.LOOP_SET_FD LoopCtlGetFree = C.LOOP_CTL_GET_FREE LoopGetStatus64 = C.LOOP_GET_STATUS64 LoopSetStatus64 = C.LOOP_SET_STATUS64 LoopClrFd = C.LOOP_CLR_FD LoopSetCapacity = C.LOOP_SET_CAPACITY )
IOCTL consts
const ( LoFlagsAutoClear = C.LO_FLAGS_AUTOCLEAR LoFlagsReadOnly = C.LO_FLAGS_READ_ONLY LoFlagsPartScan = C.LO_FLAGS_PARTSCAN LoKeySize = C.LO_KEY_SIZE LoNameSize = C.LO_NAME_SIZE )
const ( DmUdevDisableSubsystemRulesFlag = C.DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG DmUdevDisableDiskRulesFlag = C.DM_UDEV_DISABLE_DISK_RULES_FLAG DmUdevDisableOtherRulesFlag = C.DM_UDEV_DISABLE_OTHER_RULES_FLAG DmUdevDisableLibraryFallback = C.DM_UDEV_DISABLE_LIBRARY_FALLBACK )
const ( LogLevelFatal = 2 + iota // _LOG_FATAL LogLevelErr // _LOG_ERR LogLevelWarn // _LOG_WARN LogLevelNotice // _LOG_NOTICE LogLevelInfo // _LOG_INFO LogLevelDebug // _LOG_DEBUG )
definitions from lvm2 lib/log/log.h
Variables ¶
var ( ErrTaskRun = errors.New("dm_task_run failed") ErrTaskSetName = errors.New("dm_task_set_name failed") ErrTaskSetMessage = errors.New("dm_task_set_message failed") ErrTaskSetAddNode = errors.New("dm_task_set_add_node failed") ErrTaskSetRo = errors.New("dm_task_set_ro failed") ErrTaskAddTarget = errors.New("dm_task_add_target failed") ErrTaskSetSector = errors.New("dm_task_set_sector failed") ErrTaskGetDeps = errors.New("dm_task_get_deps failed") ErrTaskGetInfo = errors.New("dm_task_get_info failed") ErrTaskGetDriverVersion = errors.New("dm_task_get_driver_version failed") ErrTaskSetCookie = errors.New("dm_task_set_cookie failed") ErrNilCookie = errors.New("cookie ptr can't be nil") ErrAttachLoopbackDevice = errors.New("loopback mounting failed") ErrGetBlockSize = errors.New("Can't get block size") ErrUdevWait = errors.New("wait on udev cookie failed") ErrSetDevDir = errors.New("dm_set_dev_dir failed") ErrGetLibraryVersion = errors.New("dm_get_library_version failed") ErrCreateRemoveTask = errors.New("Can't create task of type DeviceRemove") ErrRunRemoveDevice = errors.New("running RemoveDevice failed") ErrInvalidAddNode = errors.New("Invalid AddNode type") ErrGetLoopbackBackingFile = errors.New("Unable to get loopback backing file") ErrLoopbackSetCapacity = errors.New("Unable set loopback capacity") ErrBusy = errors.New("Device is Busy") ErrDeviceIdExists = errors.New("Device Id Exists") )
var ( DmGetLibraryVersion = dmGetLibraryVersionFct DmGetNextTarget = dmGetNextTargetFct DmLogInitVerbose = dmLogInitVerboseFct DmSetDevDir = dmSetDevDirFct DmTaskAddTarget = dmTaskAddTargetFct DmTaskCreate = dmTaskCreateFct DmTaskDestroy = dmTaskDestroyFct DmTaskGetDeps = dmTaskGetDepsFct DmTaskGetInfo = dmTaskGetInfoFct DmTaskGetDriverVersion = dmTaskGetDriverVersionFct DmTaskRun = dmTaskRunFct DmTaskSetAddNode = dmTaskSetAddNodeFct DmTaskSetCookie = dmTaskSetCookieFct DmTaskSetMessage = dmTaskSetMessageFct DmTaskSetName = dmTaskSetNameFct DmTaskSetRo = dmTaskSetRoFct DmTaskSetSector = dmTaskSetSectorFct DmUdevWait = dmUdevWaitFct DmUdevSetSyncSupport = dmUdevSetSyncSupportFct DmUdevGetSyncSupport = dmUdevGetSyncSupportFct DmCookieSupported = dmCookieSupportedFct LogWithErrnoInit = logWithErrnoInitFct )
Functions ¶
func ActivateDevice ¶
func AttachLoopDevice ¶
attachLoopDevice attaches the given sparse file to the next available loopback device. It returns an opened *os.File.
func BlockDeviceDiscard ¶
func CookieSupported ¶
func CookieSupported() bool
CookieSupported returns whether the version of device-mapper supports the use of cookie's in the tasks. This is largely a lower level call that other functions use.
func CreateDevice ¶
func CreatePool ¶
This is the programmatic example of "dmsetup create"
func CreateSnapDevice ¶
func DeleteDevice ¶
func DeviceIdExists ¶
Returns whether error conveys the information about device Id already exist or not. This will be true if device creation or snap creation operation fails if device or snap device already exists in pool. Current implementation is little crude as it scans the error string for exact pattern match. Replacing it with more robust implementation is desirable.
func DevmapperLogCallback ¶
func GetDriverVersion ¶
func GetLibraryVersion ¶
func LogInit ¶
func LogInit(logger DevmapperLogger)
initialize the logger for the device mapper library
func LogInitVerbose ¶
func LogInitVerbose(level int)
func LoopbackSetCapacity ¶
func ReloadPool ¶
func ResumeDevice ¶
func SuspendDevice ¶
func UdevSetSyncSupport ¶ added in v1.5.0
UdevSetSyncSupport allows setting whether the udev sync should be enabled. The return bool indicates the state of whether the sync is enabled.
func UdevSyncSupported ¶ added in v1.5.0
func UdevSyncSupported() bool
UdevSyncSupported returns whether device-mapper is able to sync with udev
This is essential otherwise race conditions can arise where both udev and device-mapper attempt to create and destroy devices.
Types ¶
type AddNodeType ¶
type AddNodeType int
const ( AddNodeOnResume AddNodeType = iota AddNodeOnCreate )
type CDmTask ¶
type CDmTask C.struct_dm_task
type CLoopInfo64 ¶
type CLoopInfo64 C.struct_loop_info64
type DevmapperLogger ¶
type Info ¶
type LoopInfo64 ¶
type LoopInfo64 struct {
// contains filtered or unexported fields
}
type Task ¶
type Task struct {
// contains filtered or unexported fields
}
func TaskCreate ¶
TaskCreate initializes a devicemapper task of tasktype
func TaskCreateNamed ¶
TaskCreateNamed is a convenience function for TaskCreate when a name will be set on the task as well
func (*Task) GetDriverVersion ¶
func (*Task) GetNextTarget ¶
func (*Task) SetAddNode ¶
func (t *Task) SetAddNode(addNode AddNodeType) error