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devmapper: Call UdevWait() even in failure path

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Currently we set up a cookie and upon failure not call UdevWait(). This
does not cleanup the cookie and associated semaphore and system will
soon max out on total number of semaphores.

To avoid this, call UdevWait() even in failure path which in turn will
cleanup associated semaphore.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit is contained in:
Vivek Goyal 2014-11-14 18:15:56 -05:00 committed by Vincent Batts
parent 8682bac309
commit edc6df256d
1 changed files with 4 additions and 6 deletions
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10
pkg/devicemapper/devmapper.go
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@ -373,13 +373,12 @@ func CreatePool(poolName string, dataFile, metadataFile *os.File, poolBlockSize
if err := task.SetCookie(&cookie, 0); err != nil {
return fmt.Errorf("Can't set cookie %s", err)
}
defer UdevWait(cookie)
if err := task.Run(); err != nil {
return fmt.Errorf("Error running DeviceCreate (CreatePool) %s", err)
}
UdevWait(cookie)
return nil
}
@ -516,13 +515,12 @@ func ResumeDevice(name string) error {
if err := task.SetCookie(&cookie, 0); err != nil {
return fmt.Errorf("Can't set cookie %s", err)
}
defer UdevWait(cookie)
if err := task.Run(); err != nil {
return fmt.Errorf("Error running DeviceResume %s", err)
}
UdevWait(cookie)
return nil
}
@ -596,12 +594,12 @@ func ActivateDevice(poolName string, name string, deviceId int, size uint64) err
return fmt.Errorf("Can't set cookie %s", err)
}
defer UdevWait(cookie)
if err := task.Run(); err != nil {
return fmt.Errorf("Error running DeviceCreate (ActivateDevice) %s", err)
}
UdevWait(cookie)
return nil
}