def get_path_count(SCSIid, active=True):
count = 0
if mpp_luncheck.is_RdacLun(SCSIid):
(total_count, active_count) = mpp_mpathutil.get_pathinfo(SCSIid)
return (total_count, active_count)
lines = mpath_cli.get_topology(SCSIid)
for line in filter(match_dmpLUN, lines):
if not active:
count += 1
elif match_pathup(line):
count += 1
return count
def get_path_count(SCSIid, active=True):
count = 0
if (mpp_luncheck.is_RdacLun(SCSIid)):
(total_count, active_count) = mpp_mpathutil.get_pathinfo(SCSIid)
return (total_count, active_count)
lines = mpath_cli.get_topology(SCSIid)
for line in filter(match_dmpLUN,lines):
if not active:
count += 1
elif match_pathup(line):
count += 1
return count
def UpdatePaths():
while True:
try:
session = None
# Garbage collect any memory allocated in the last run of the loop
DEBUG("The garbage collection routine returned: %d" % gc.collect())
# Sleep for some time before checking the status again
time.sleep(MPP_PATH_STATUS_UPDATE_INTERVAL)
# List the contents of the directory /dev/disk/mpInuse
fileList = glob.glob(MPP_DEVICES_IN_USE_LOCATION + "/" + "*")
if not len(fileList):
continue
# for each SCSI ID get the cached values of the total paths and active paths
# and then compare this with the current path status obtained using mpp_mpathutil.py
for filename in fileList:
# extract the SCSI ID from the file name.
scsiid = filename.rsplit("/")[len(filename.rsplit("/")) - 1].split("-")[0]
if not (mpp_luncheck.is_RdacLun(scsiid)):
continue
# Get the cached value for the total and active paths for this SCSI ID
try:
cacheFile = glob.glob(MPP_PATH_CACHE_LOCATION + "/" + scsiid + "*")
if len(cacheFile) > 1:
DEBUG("More than one cache file found for SCSI ID %s. Please check the cache manually.")
raise Exception
# This will return only one file name of the form SCSIID:TOTALPATHS:ACTIVEPATHS, so parse accordingly
cachedTotalPaths = cacheFile[0].split(":")[1]
cachedActivePaths = cacheFile[0].split(":")[2]
cacheFileFound = True
except:
DEBUG("There was an exception getting the cached path status for SCSI ID %s, assuming 0s." % scsiid)
cachedTotalPaths = 0
cachedActivePaths = 0
cacheFileFound = False
(totalPaths, activePaths) = mpp_mpathutil.get_pathinfo(scsiid)
DEBUG(
"For SCSI ID %s, cached TotalPaths: %s, cached ActivePaths: %s, New Totalpaths: %s New ActivePaths: %s"
% (scsiid, cachedTotalPaths, cachedActivePaths, totalPaths, activePaths)
)
if cachedTotalPaths != str(totalPaths) or cachedActivePaths != str(activePaths):
DEBUG("Some path status has changed for SCSI ID %s, updating PBD." % scsiid)
entry = "[" + str(activePaths) + ", " + str(totalPaths) + "]"
DEBUG(entry)
cmd = ["/opt/xensource/sm/mpathcount.py", scsiid, entry]
util.pread2(cmd)
# Now update the cache with this updated path status
DEBUG("Checking if cache file was found.")
if cacheFileFound == True:
DEBUG("Cache file was found, delete it.")
os.remove(cacheFile[0])
cacheFileName = (
MPP_PATH_CACHE_LOCATION + "/" + scsiid + ":" + str(totalPaths) + ":" + str(activePaths)
)
DEBUG("Generated new cache file name %s" % cacheFileName)
open(cacheFileName, "w").close()
except:
pass
# DEBUG("There was some exception while updating path status for the SCSI ID %s." % scsiid )
# break
if session != None:
session.xenapi.session.logout()
return
def UpdatePaths():
while (True):
try:
session = None
# Garbage collect any memory allocated in the last run of the loop
DEBUG("The garbage collection routine returned: %d" % gc.collect())
# Sleep for some time before checking the status again
time.sleep(MPP_PATH_STATUS_UPDATE_INTERVAL)
# List the contents of the directory /dev/disk/mpInuse
fileList = glob.glob(MPP_DEVICES_IN_USE_LOCATION + "/" + "*")
if not len(fileList):
continue
# for each SCSI ID get the cached values of the total paths and active paths
# and then compare this with the current path status obtained using mpp_mpathutil.py
for filename in fileList:
# extract the SCSI ID from the file name.
scsiid = filename.rsplit("/")[len(filename.rsplit("/")) -
1].split('-')[0]
if not (mpp_luncheck.is_RdacLun(scsiid)):
continue
# Get the cached value for the total and active paths for this SCSI ID
try:
cacheFile = glob.glob(MPP_PATH_CACHE_LOCATION + "/" +
scsiid + "*")
if len(cacheFile) > 1:
DEBUG(
"More than one cache file found for SCSI ID %s. Please check the cache manually."
)
raise Exception
# This will return only one file name of the form SCSIID:TOTALPATHS:ACTIVEPATHS, so parse accordingly
cachedTotalPaths = cacheFile[0].split(":")[1]
cachedActivePaths = cacheFile[0].split(":")[2]
cacheFileFound = True
except:
DEBUG(
"There was an exception getting the cached path status for SCSI ID %s, assuming 0s."
% scsiid)
cachedTotalPaths = 0
cachedActivePaths = 0
cacheFileFound = False
(totalPaths, activePaths) = mpp_mpathutil.get_pathinfo(scsiid)
DEBUG(
"For SCSI ID %s, cached TotalPaths: %s, cached ActivePaths: %s, New Totalpaths: %s New ActivePaths: %s"
% (scsiid, cachedTotalPaths, cachedActivePaths, totalPaths,
activePaths))
if cachedTotalPaths != str(
totalPaths) or cachedActivePaths != str(activePaths):
DEBUG(
"Some path status has changed for SCSI ID %s, updating PBD."
% scsiid)
entry = "[" + str(activePaths) + ", " + str(
totalPaths) + "]"
DEBUG(entry)
cmd = ['/opt/xensource/sm/mpathcount.py', scsiid, entry]
util.pread2(cmd)
# Now update the cache with this updated path status
DEBUG("Checking if cache file was found.")
if cacheFileFound == True:
DEBUG("Cache file was found, delete it.")
os.remove(cacheFile[0])
cacheFileName = MPP_PATH_CACHE_LOCATION + "/" + scsiid + ":" + str(
totalPaths) + ":" + str(activePaths)
DEBUG("Generated new cache file name %s" % cacheFileName)
open(cacheFileName, 'w').close()
except:
pass
#DEBUG("There was some exception while updating path status for the SCSI ID %s." % scsiid )
#break
if session != None:
session.xenapi.session.logout()
return