def doUnmountMaster(cls, masterdir):
"""
Unmount the master metadata file system. Should be called only by SPM.
"""
# fuser processes holding mount point and validate that the umount
# succeeded
cls.__handleStuckUmount(masterdir)
try:
masterMount = mount.getMountFromTarget(masterdir)
except OSError as ex:
if ex.errno == errno.ENOENT:
return
raise
if masterMount.isMounted():
# Try umount, take 1
try:
masterMount.umount()
except mount.MountError:
# umount failed, try to kill that processes holding mount point
svdsmp = svdsm.getProxy()
pids = svdsmp.fuser(masterMount.fs_file, mountPoint=True)
# It was unmounted while I was checking no need to do anything
if not masterMount.isMounted():
return
if len(pids) == 0:
cls.log.warn("Unmount failed because of errors that fuser "
"can't solve")
else:
for pid in pids:
try:
cls.log.debug("Trying to kill pid %d", pid)
os.kill(pid, signal.SIGKILL)
except OSError as e:
if e.errno == errno.ESRCH: # No such process
pass
elif e.errno == errno.EPERM: # Op. not permitted
cls.log.warn("Could not kill pid %d because "
"operation was not permitted",
pid)
else:
cls.log.warn("Could not kill pid %d because an"
" unexpected error",
exc_info=True)
except:
cls.log.warn("Could not kill pid %d because an "
"unexpected error", exc_info=True)
# Try umount, take 2
try:
masterMount.umount()
except mount.MountError:
pass
if masterMount.isMounted():
# We failed to umount masterFS
# Forcibly rebooting the SPM host would be safer. ???
raise se.StorageDomainMasterUnmountError(masterdir, 1)
def doUnmountMaster(cls, masterdir):
"""
Unmount the master metadata file system. Should be called only by SPM.
"""
# fuser processes holding mount point and validate that the umount
# succeeded
cls.__handleStuckUmount(masterdir)
try:
masterMount = mount.getMountFromTarget(masterdir)
except OSError as ex:
if ex.errno == errno.ENOENT:
return
raise
if masterMount.isMounted():
# Try umount, take 1
try:
masterMount.umount()
except mount.MountError:
# umount failed, try to kill that processes holding mount point
svdsmp = svdsm.getProxy()
pids = svdsmp.fuser(masterMount.fs_file, mountPoint=True)
# It was unmounted while I was checking no need to do anything
if not masterMount.isMounted():
return
if len(pids) == 0:
cls.log.warn("Unmount failed because of errors that fuser "
"can't solve")
else:
for pid in pids:
try:
cls.log.debug("Trying to kill pid %d", pid)
os.kill(pid, signal.SIGKILL)
except OSError as e:
if e.errno == errno.ESRCH: # No such process
pass
elif e.errno == errno.EPERM: # Op. not permitted
cls.log.warn("Could not kill pid %d because "
"operation was not permitted",
pid)
else:
cls.log.warn("Could not kill pid %d because an"
" unexpected error",
exc_info=True)
except:
cls.log.warn("Could not kill pid %d because an "
"unexpected error", exc_info=True)
# Try umount, take 2
try:
masterMount.umount()
except mount.MountError:
pass
if masterMount.isMounted():
# We failed to umount masterFS
# Forcibly rebooting the SPM host would be safer. ???
raise se.StorageDomainMasterUnmountError(masterdir, 1)
def selftest(self):
"""
Run internal self test
"""
try:
self.oop.os.statvfs(self.domaindir)
except OSError as e:
if e.errno == errno.ESTALE:
# In case it is "Stale NFS handle" we are taking preventive
# measures and unmounting this NFS resource. Chances are
# that is the most intelligent thing we can do in this
# situation anyway.
self.log.debug("Unmounting stale file system %s", self.mountpoint)
mount.getMountFromTarget(self.mountpoint).umount()
raise se.FileStorageDomainStaleNFSHandle()
raise
def selftest(self):
"""
Run internal self test
"""
try:
self.oop.os.statvfs(self.domaindir)
except OSError as e:
if e.errno == errno.ESTALE:
# In case it is "Stale NFS handle" we are taking preventive
# measures and unmounting this NFS resource. Chances are
# that is the most intelligent thing we can do in this
# situation anyway.
self.log.debug("Unmounting stale file system %s",
self.mountpoint)
mount.getMountFromTarget(self.mountpoint).umount()
raise se.FileStorageDomainStaleNFSHandle()
raise
def __handleStuckUmount(cls, masterDir):
umountPids = utils.pgrep("umount")
try:
masterMount = mount.getMountFromTarget(masterDir)
except OSError as ex:
if ex.errno == errno.ENOENT:
return
raise
for umountPid in umountPids:
try:
state = utils.pidStat(umountPid).state
mountPoint = utils.getCmdArgs(umountPid)[-1]
except:
# Process probably exited
continue
if mountPoint != masterDir:
continue
if state != "D":
# If the umount is not in d state there
# is a possibility that the world might
# be in flux and umount will get stuck
# in an unkillable state that is not D
# which I don't know about, perhaps a
# bug in umount will cause umount to
# wait for something unrelated that is
# not the syscall. Waiting on a process
# which is not your child is race prone
# I will just call for another umount
# and wait for it to finish. That way I
# know that a umount ended.
try:
masterMount.umount()
except mount.MountError:
# timeout! we are stuck again.
# if you are here spmprotect forgot to
# reboot the machine but in any case
# continue with the disconnection.
pass
try:
vgName = masterDir.rsplit("/", 2)[1]
masterDev = os.path.join(
"/dev/mapper",
vgName.replace("-", "--") + "-" + MASTERLV)
except KeyError:
# Umount succeeded after all
return
cls.log.warn(
"master mount resource is `%s`, trying to disconnect "
"underlying storage", masterDev)
iscsi.disconnectFromUndelyingStorage(masterDev)
def __handleStuckUmount(cls, masterDir):
umountPids = utils.pgrep("umount")
try:
masterMount = mount.getMountFromTarget(masterDir)
except OSError as ex:
if ex.errno == errno.ENOENT:
return
raise
for umountPid in umountPids:
try:
state = utils.pidStat(umountPid).state
mountPoint = utils.getCmdArgs(umountPid)[-1]
except:
# Process probably exited
continue
if mountPoint != masterDir:
continue
if state != "D":
# If the umount is not in d state there
# is a possibility that the world might
# be in flux and umount will get stuck
# in an unkillable state that is not D
# which I don't know about, perhaps a
# bug in umount will cause umount to
# wait for something unrelated that is
# not the syscall. Waiting on a process
# which is not your child is race prone
# I will just call for another umount
# and wait for it to finish. That way I
# know that a umount ended.
try:
masterMount.umount()
except mount.MountError:
# timeout! we are stuck again.
# if you are here spmprotect forgot to
# reboot the machine but in any case
# continue with the disconnection.
pass
try:
vgName = masterDir.rsplit("/", 2)[1]
masterDev = os.path.join(
"/dev/mapper", vgName.replace("-", "--") + "-" + MASTERLV)
except KeyError:
# Umount succeeded after all
return
cls.log.warn("master mount resource is `%s`, trying to disconnect "
"underlying storage", masterDev)
iscsi.disconnectFromUndelyingStorage(masterDev)
def getRealPath(self):
try:
return mount.getMountFromTarget(self.mountpoint).fs_spec
except mount.MountError:
return ""
def getRealPath(self):
try:
return mount.getMountFromTarget(self.mountpoint).fs_spec
except mount.MountError:
return ""
