def do_trim(session, args):
"""Attempt to trim the given LVHDSR"""
util.SMlog("do_trim: %s" % args)
sr_uuid = args["sr_uuid"]
os.environ['LVM_SYSTEM_DIR'] = MASTER_LVM_CONF
if TRIM_CAP not in util.sr_get_capability(sr_uuid):
util.SMlog("Trim command ignored on unsupported SR %s" % sr_uuid)
err_msg = {
ERROR_CODE_KEY: 'UnsupportedSRForTrim',
ERROR_MSG_KEY: 'Trim on [%s] not supported' % sr_uuid
}
return to_xml(err_msg)
# Lock SR, get vg empty space details
sr_lock = lock.Lock(vhdutil.LOCK_TYPE_SR, sr_uuid)
got_lock = False
for i in range(LOCK_RETRY_ATTEMPTS):
got_lock = sr_lock.acquireNoblock()
if got_lock:
break
time.sleep(LOCK_RETRY_INTERVAL)
if got_lock:
try:
vg_name = _vg_by_sr_uuid(sr_uuid)
lv_name = sr_uuid + TRIM_LV_TAG
lv_path = _lvpath_by_vg_lv_name(vg_name, lv_name)
# Clean trim LV in case the previous trim attemp failed
if lvutil.exists(lv_path):
lvutil.remove(lv_path)
#Check if VG limits are enough for creating LV.
stats = lvutil._getVGstats(vg_name)
if (stats['freespace'] < lvutil.LVM_SIZE_INCREMENT):
util.SMlog("No space to claim on a full SR %s" % sr_uuid)
err_msg = {
ERROR_CODE_KEY: 'Trim failed on full SR',
ERROR_MSG_KEY: 'No space to claim on a full SR'
}
result = to_xml(err_msg)
else:
# Perform a lvcreate, blkdiscard and lvremove to
# trigger trim on the array
lvutil.create(lv_name, 0, vg_name, size_in_percentage="100%F")
cmd = ["/usr/sbin/blkdiscard", "-v", lv_path]
stdout = util.pread2(cmd)
util.SMlog("Stdout is %s" % stdout)
util.SMlog("Trim on SR: %s complete. " % sr_uuid)
result = str(True)
except util.CommandException, e:
err_msg = {
ERROR_CODE_KEY: 'TrimException',
ERROR_MSG_KEY: e.reason
}
result = to_xml(err_msg)
except:
def do_trim(session, args):
"""Attempt to trim the given LVHDSR"""
util.SMlog("do_trim: %s" % args)
sr_uuid = args["sr_uuid"]
os.environ['LVM_SYSTEM_DIR'] = MASTER_LVM_CONF
if TRIM_CAP not in util.sr_get_capability(sr_uuid):
util.SMlog("Trim command ignored on unsupported SR %s" % sr_uuid)
err_msg = {ERROR_CODE_KEY: 'UnsupportedSRForTrim',
ERROR_MSG_KEY: 'Trim on [%s] not supported' % sr_uuid}
return to_xml(err_msg)
# Lock SR, get vg empty space details
sr_lock = lock.Lock(vhdutil.LOCK_TYPE_SR, sr_uuid)
got_lock = False
for i in range(LOCK_RETRY_ATTEMPTS):
got_lock = sr_lock.acquireNoblock()
if got_lock:
break
time.sleep(LOCK_RETRY_INTERVAL)
if got_lock:
try:
vg_name = _vg_by_sr_uuid(sr_uuid)
lv_name = sr_uuid + TRIM_LV_TAG
lv_path = _lvpath_by_vg_lv_name(vg_name, lv_name)
# Clean trim LV in case the previous trim attemp failed
if lvutil.exists(lv_path):
lvutil.remove(lv_path)
#Check if VG limits are enough for creating LV.
stats = lvutil._getVGstats(vg_name)
if (stats['freespace'] < lvutil.LVM_SIZE_INCREMENT):
util.SMlog("No space to claim on a full SR %s" % sr_uuid)
err_msg = {ERROR_CODE_KEY: 'Trim failed on full SR',
ERROR_MSG_KEY: 'No space to claim on a full SR'}
result = to_xml(err_msg)
else:
# Perform a lvcreate, blkdiscard and lvremove to
# trigger trim on the array
lvutil.create(lv_name, 0, vg_name, size_in_percentage="100%F")
cmd = ["/usr/sbin/blkdiscard", "-v", lv_path]
stdout = util.pread2(cmd)
util.SMlog("Stdout is %s" % stdout)
util.SMlog("Trim on SR: %s complete. " % sr_uuid)
result = str(True)
except util.CommandException, e:
err_msg = {
ERROR_CODE_KEY: 'TrimException',
ERROR_MSG_KEY: e.reason
}
result = to_xml(err_msg)
except:
def do_trim(session, args):
"""Attempt to trim the given LVHDSR"""
util.SMlog("do_trim: %s" % args)
sr_uuid = args["sr_uuid"]
if TRIM_CAP not in util.sr_get_capability(sr_uuid):
util.SMlog("Trim command ignored on unsupported SR %s" % sr_uuid)
err_msg = {ERROR_CODE_KEY: 'UnsupportedSRForTrim',
ERROR_MSG_KEY: 'Trim on [%s] not supported' % sr_uuid}
return to_xml(err_msg)
# Lock SR, get vg empty space details
sr_lock = lock.Lock(vhdutil.LOCK_TYPE_SR, sr_uuid)
got_lock = False
for i in range(LOCK_RETRY_ATTEMPTS):
got_lock = sr_lock.acquireNoblock()
if got_lock:
break
time.sleep(LOCK_RETRY_INTERVAL)
if got_lock:
try:
vg_name = _vg_by_sr_uuid(sr_uuid)
lv_name = sr_uuid + TRIM_LV_TAG
lv_path = _lvpath_by_vg_lv_name(vg_name, lv_name)
# Clean trim LV in case the previous trim attemp failed
if lvutil.exists(lv_path):
lvutil.remove(lv_path)
# Perform a lvcreate and lvremove to trigger trim on the array
lvutil.create(lv_name, 0, vg_name, size_in_percentage="100%F")
lvutil.remove(lv_path, config_param="issue_discards=1")
util.SMlog("Trim on SR: %s complete. " % sr_uuid)
result = str(True)
except:
err_msg = {
ERROR_CODE_KEY: 'UnknownTrimException',
ERROR_MSG_KEY: 'Unknown Exception: trim failed on SR [%s]'
% sr_uuid
}
result = to_xml(err_msg)
_log_last_triggered(session, sr_uuid)
sr_lock.release()
return result
else:
util.SMlog("Could not complete Trim on %s, Lock unavailable !" \
% sr_uuid)
err_msg = {ERROR_CODE_KEY: 'SRUnavailable',
ERROR_MSG_KEY: 'Unable to get SR lock [%s]' % sr_uuid}
return to_xml(err_msg)
util.SMlog("Stdout is %s" % stdout)
util.SMlog("Trim on SR: %s complete. " % sr_uuid)
result = str(True)
except util.CommandException, e:
err_msg = {
ERROR_CODE_KEY: 'TrimException',
ERROR_MSG_KEY: e.reason
}
result = to_xml(err_msg)
except:
err_msg = {
ERROR_CODE_KEY: 'UnknownTrimException',
ERROR_MSG_KEY: 'Unknown Exception: trim failed on SR [%s]'
% sr_uuid
}
result = to_xml(err_msg)
finally:
if lvutil.exists(lv_path):
lvutil.remove(lv_path)
_log_last_triggered(session, sr_uuid)
sr_lock.release()
return result
else:
util.SMlog("Could not complete Trim on %s, Lock unavailable !" \
% sr_uuid)
err_msg = {ERROR_CODE_KEY: 'SRUnavailable',
ERROR_MSG_KEY: 'Unable to get SR lock [%s]' % sr_uuid}
return to_xml(err_msg)
except util.CommandException, e:
err_msg = {
ERROR_CODE_KEY: 'TrimException',
ERROR_MSG_KEY: e.reason
}
result = to_xml(err_msg)
except:
err_msg = {
ERROR_CODE_KEY:
'UnknownTrimException',
ERROR_MSG_KEY:
'Unknown Exception: trim failed on SR [%s]' % sr_uuid
}
result = to_xml(err_msg)
finally:
if lvutil.exists(lv_path):
lvutil.remove(lv_path)
_log_last_triggered(session, sr_uuid)
sr_lock.release()
return result
else:
util.SMlog("Could not complete Trim on %s, Lock unavailable !" \
% sr_uuid)
err_msg = {
ERROR_CODE_KEY: 'SRUnavailable',
ERROR_MSG_KEY: 'Unable to get SR lock [%s]' % sr_uuid
}
return to_xml(err_msg)