/usr/share/pyshared/tcm_dump.py is in lio-utils 3.1+git2.fd0b34fd-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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import os, sys, shutil
import subprocess as sub
from subprocess import Popen, PIPE
import string
import re
import datetime, time
from optparse import OptionParser
import tcm_node
import tcm_pscsi
import tcm_iblock
import tcm_ramdisk
import tcm_fileio
import lio_dump
import tcm_fabric
tcm_root = "/sys/kernel/config/target/core"
def tcm_dump_hba_devices():
pass
def tcm_dump_configfs(option, opt_str, value, parser):
if not os.path.isdir(tcm_root):
print "Unable to access tcm_root: " + tcm_root
sys.exit(1)
print "modprobe target_core_mod"
# Loop through ALUA Logical Unit Groups
# Note that the 'default_lu_gp' is automatically created when
# target_core_mod is loaded.
print "#### ALUA Logical Unit Groups"
for lu_gp in os.listdir(tcm_root + "/alua/lu_gps"):
if lu_gp == "default_lu_gp":
continue
print "mkdir -p " + tcm_root + "/alua/lu_gps/" + lu_gp
lu_gp_id_file = tcm_root + "/alua/lu_gps/" + lu_gp + "/lu_gp_id"
p = os.open(lu_gp_id_file, 0)
value = os.read(p, 8)
os.close(p)
if not value:
continue
print "echo " + value.rstrip() + " > " + lu_gp_id_file
# Loop through HBA list
for f in os.listdir(tcm_root):
if f == "alua":
continue;
# print "mkdir -p " + tcm_root + "/" + f
dev_root = tcm_root + "/" + f + "/"
for g in os.listdir(dev_root):
if g == "hba_info" or g == "hba_mode":
continue;
# Dump device aka storage object
print "#### Parameters for TCM subsystem plugin storage object reference"
# Generate subsystem dependent configfs ops for association to
# an target_core_mod storage object.
result = re.search('pscsi_', f)
if result:
dev = dev_root + g
params = tcm_pscsi.pscsi_get_params(dev)
if not params:
continue
print "tcm_node --establishdev " + f + "/" + g + " " + str(params)
result = re.search('iblock_', f)
if result:
dev = dev_root + g
params = tcm_iblock.iblock_get_params(dev)
if not params:
continue
print "tcm_node --establishdev " + f + "/" + g + " " + str(params)
result = re.search('rd_dr_', f)
if result:
dev = dev_root + g
params = tcm_ramdisk.rd_get_params(dev)
if not params:
continue
print "tcm_node --establishdev " + f + "/" + g + " " + str(params)
result = re.search('rd_mcp_', f)
if result:
dev = dev_root + g
params = tcm_ramdisk.rd_get_params(dev)
if not params:
continue
print "tcm_node --establishdev " + f + "/" + g + " " + str(params)
result = re.search('fileio_', f)
if result:
dev = dev_root + g
params = tcm_fileio.fd_get_params(dev)
if not params:
continue
print "tcm_node --establishdev " + f + "/" + g + " " + str(params)
# Dump T10 VP Unit Serial for all non Target_Core_Mod/pSCSI objects
result = re.search('pscsi_', f)
if not result:
unit_serial_file = dev_root + g + "/wwn/vpd_unit_serial"
p = os.open(unit_serial_file, 0)
value = os.read(p, 512)
off = value.index('Number: ')
off += 8 # Skip over "Number: "
unit_serial = value[off:]
# Note that this will handle read, parse and set any PR APTPL metadata
print "tcm_node --setunitserialwithmd " + f + "/" + g + " " + unit_serial.rstrip()
os.close(p)
# Dump device object alias
alias_file = dev_root + g + "/alias"
p = open(alias_file, 'r')
value = p.read(512)
value = value.rstrip()
p.close()
if value:
print "echo -n \"" + value + "\" > " + dev_root + g + "/alias"
# Dump ALUA Logical Unit Group
lu_gp_file = dev_root + g + "/alua_lu_gp"
p = os.open(lu_gp_file, 0)
value = os.read(p, 512)
os.close(p)
if value:
lu_gp_tmp = value.split('\n')
lu_gp_out = lu_gp_tmp[0]
off = lu_gp_out.index('Alias: ')
off += 7 # Skip over "Alias: "
lu_gp_name = lu_gp_out[off:]
# Only need to dump if storage object is NOT part of
# the 'default_lu_gp'
if not re.search(lu_gp_name, 'default_lu_gp'):
print "echo " + lu_gp_name + " > " + lu_gp_file
# Loop through ALUA Target Port Groups
if os.path.isdir(dev_root + g + "/alua/") == True:
print "#### ALUA Target Port Groups"
for tg_pt_gp in os.listdir(dev_root + g + "/alua/"):
tg_pt_gp_id_file = dev_root + g + "/alua/" + tg_pt_gp + "/tg_pt_gp_id"
p = os.open(tg_pt_gp_id_file, 0)
value = os.read(p, 8)
os.close(p)
if not value:
continue
print "tcm_node --addaluatpgwithmd " + f + "/" + g + " " + tg_pt_gp + " " + value.rstrip()
# Dump the ALUA types
tg_pt_gp_type_file = dev_root + g + "/alua/" + tg_pt_gp + "/alua_access_type"
p = os.open(tg_pt_gp_type_file, 0)
value = os.read(p, 32)
os.close(p)
if value:
value = value.rstrip()
alua_type = 0
if re.search('Implict and Explict', value):
alua_type = 3
elif re.search('Explict', value):
alua_type = 2
elif re.search('Implict', value):
alua_type = 1
print "echo " + str(alua_type) + " > " + tg_pt_gp_type_file
# Dump the preferred bit
tg_pt_gp_pref_file = dev_root + g + "/alua/" + tg_pt_gp + "/preferred"
p = os.open(tg_pt_gp_pref_file, 0)
value = os.read(p, 8)
os.close(p)
if value:
print "echo " + value.rstrip() + " > " + tg_pt_gp_pref_file
# Dump the Active/NonOptimized Delay
tg_pt_gp_nonop_delay_file = dev_root + g + "/alua/" + tg_pt_gp + "/nonop_delay_msecs"
p = os.open(tg_pt_gp_nonop_delay_file, 0)
value = os.read(p, 8)
os.close(p)
if value:
print "echo " + value.rstrip() + " > " + tg_pt_gp_nonop_delay_file
# Dump the Transition Delay
tg_pt_gp_trans_delay_file = dev_root + g + "/alua/" + tg_pt_gp + "/trans_delay_msecs"
p = os.open(tg_pt_gp_trans_delay_file, 0)
value = os.read(p, 8)
os.close(p)
if value:
print "echo " + value.rstrip() + " > " + tg_pt_gp_trans_delay_file
# Dump device attributes
print "#### Attributes for " + dev_root + g
dev_attrib_root = dev_root + g + "/attrib/"
for h in os.listdir(dev_attrib_root):
# The hw_* prefixed attributes are RO
if h == "hw_queue_depth":
continue
if h == "hw_max_sectors":
continue
if h == "hw_block_size":
continue
# Do not change block-size for target_core_mod/pSCSI
if h == "block_size":
result = re.search('pscsi_', f)
if result:
continue
attrib_file = dev_attrib_root + h
p = os.open(attrib_file, 0)
value = os.read(p, 8)
print "echo " + value.rstrip() + " > " + attrib_file
os.close(p)
# Dump snapshot attributes
snap_attrib_root = dev_root + g + "/snap/"
if (os.path.isdir(snap_attrib_root) == False):
continue
snap_enabled = 0
enabled_attr_file = snap_attrib_root + "enabled"
p = open(enabled_attr_file, 'rU')
if not p:
continue
value = p.read()
enabled = value.rstrip()
p.close()
if enabled != "1":
continue
snap_enabled = 1
print "#### Snapshot Attributes for " + dev_root + g
for s in os.listdir(snap_attrib_root):
if s == "pid":
continue
if s == "usage":
continue
if s == "enabled":
continue
attrib_file = snap_attrib_root + s
p = open(attrib_file, 'rU')
value = p.read()
p.close()
attr_val = value.rstrip()
print "echo " + attr_val + " > " + attrib_file
if snap_enabled == 1:
print "tcm_node --lvsnapstart " + f + "/" + g
def tcm_backup_to_file(option, opt_str, value, parser):
datetime = str(value)
if not os.path.isdir(tcm_root):
print "Unable to access tcm_root: " + tcm_root
sys.exit(1)
backup_dir = "/etc/target/backup"
if not os.path.isdir(backup_dir):
op = "mkdir " + backup_dir
ret = os.system(op)
if ret:
print "Unable to open backup_dir"
sys.exit(1)
op = "tcm_dump --stdout"
p = sub.Popen(op, shell=True, stdout=sub.PIPE).stdout
if not p:
print "Unable to dump Target_Core_Mod/ConfigFS running state"
sys.exit(0)
print "Making backup of Target_Core_Mod/ConfigFS with timestamp: " + datetime
backup_file = backup_dir + "/tcm_backup-" + datetime + ".sh"
if os.path.isfile(backup_file):
print "Target_Core_Mod backup_file: " + backup_file + "already exists, exiting"
p.close()
sys.exit(1)
back = open(backup_file, 'w')
line = p.readline()
while line:
print >>back, line.rstrip()
line = p.readline()
p.close()
back.close()
return backup_file
def tcm_full_backup(option, opt_str, value, parser):
overwrite = str(value)
now = datetime.datetime.now()
tmp = str(now)
tmp2 = tmp.split(' ')
timestamp = tmp2[0] + "_" + tmp2[1]
tcm_file = "/etc/target/tcm_start.sh"
lio_file = "/etc/target/lio_start.sh"
lio_active = 0
ret = tcm_fabric.fabric_backup_to_file_all(timestamp)
if ret:
print "Unable to backup tcm_fabric.modules"
if os.path.isdir("/sys/kernel/config/target/iscsi"):
lio_file_new = lio_dump.lio_backup_to_file(None, None, timestamp, None)
if not lio_file_new:
sys.exit(1)
lio_active = 1
print "Generated LIO-Target config: " + lio_file_new
tcm_file_new = tcm_backup_to_file(None, None, timestamp, None)
if not tcm_file_new:
sys.exit(1)
print "Generated Target_Core_Mod config: " + tcm_file_new
if overwrite != "1":
print "Not updating default config"
return
if lio_active:
ret = shutil.copyfile(lio_file_new, lio_file)
if ret:
print "Unable to copy " + lio_file_new
sys.exit(1)
print "Successfully updated default config " + lio_file
ret = shutil.copyfile(tcm_file_new, tcm_file)
if ret:
print "Unable to copy " + tcm_file_new
sys.exit(1)
print "Successfully updated default config " + tcm_file
def tcm_overwrite_default(option, opt_str, value, parser):
input = raw_input("Are you sure you want to overwrite the default configuration? Type 'yes': ")
if input != "yes":
sys.exit(0)
val = "1"
tcm_full_backup(None, None, val, None)
def main():
parser = OptionParser()
parser.add_option("--b","--backup", action="callback", callback=tcm_full_backup, nargs=1,
type="string", dest="OVERWRITE", help="Do backup of TCM and storage fabric modules, and optionally overwrite default config data")
parser.add_option("--o","--overwrite", action="callback", callback=tcm_overwrite_default, nargs=0,
help="Overwrite default config data of TCM and storage fabric modules")
parser.add_option("--s","--stdout", action="callback", callback=tcm_dump_configfs, nargs=0,
help="Dump running Target_Core_Mod/ConfigFS syntax to STDOUT")
parser.add_option("--t", "--tofile", action="callback", callback=tcm_backup_to_file, nargs=1,
type="string", dest="DATE_TIME", help="Backup running Target_Core_Mod/ConfigFS syntax to /etc/target/backup/tcm_backup-<DATE_TIME>.sh")
(options, args) = parser.parse_args()
if len(sys.argv) == 1:
parser.print_help()
sys.exit(0)
elif not re.search('--', sys.argv[1]):
print "Unknown CLI option: " + sys.argv[1]
sys.exit(1)
if __name__ == "__main__":
main()
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