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Merge pull request #14021 from rhvgoyal/detect-pool-loopback-devices

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devicemapper: Check loop devices of existing pool
This commit is contained in:
Vincent Batts 2015-07-13 21:15:23 -04:00
commit 5780ccaafa
1 changed files with 25 additions and 0 deletions
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25
devicemapper/devmapper.go
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@ -587,6 +587,31 @@ func GetStatus(name string) (uint64, uint64, string, string, error) {
return start, length, targetType, params, nil return start, length, targetType, params, nil
} }
func GetTable(name string) (uint64, uint64, string, string, error) {
task, err := TaskCreateNamed(DeviceTable, name)
if task == nil {
logrus.Debugf("GetTable: Error TaskCreateNamed: %s", err)
return 0, 0, "", "", err
}
if err := task.Run(); err != nil {
logrus.Debugf("GetTable: Error Run: %s", err)
return 0, 0, "", "", err
}
devinfo, err := task.GetInfo()
if err != nil {
logrus.Debugf("GetTable: Error GetInfo: %s", err)
return 0, 0, "", "", err
}
if devinfo.Exists == 0 {
logrus.Debugf("GetTable: Non existing device %s", name)
return 0, 0, "", "", fmt.Errorf("Non existing device %s", name)
}
_, start, length, targetType, params := task.GetNextTarget(unsafe.Pointer(nil))
return start, length, targetType, params, nil
}
func SetTransactionId(poolName string, oldId uint64, newId uint64) error { func SetTransactionId(poolName string, oldId uint64, newId uint64) error {
task, err := TaskCreateNamed(DeviceTargetMsg, poolName) task, err := TaskCreateNamed(DeviceTargetMsg, poolName)
if task == nil { if task == nil {