/usr/share/pyshared/tcm_fabric.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
import string
import re
import datetime, time
import optparse
target_root = "/sys/kernel/config/target/"
spec_root = "/var/target/fabric/"
def fabric_err(msg):
print >> sys.stderr, msg
sys.exit(1)
def fabric_configfs_dump(fabric_name, fabric_root, module_name):
if not os.path.isdir(fabric_root):
print "Unable to access fabric_root: " + fabric_root
sys.exit(1)
iqn_root = os.listdir(fabric_root)
# This will load up the fabric module
print "modprobe " + module_name
print "mkdir " + fabric_root
# print "#### " + fabric_name + " Discovery authentication information"
auth_dir = fabric_root + "/discovery_auth"
if os.path.isdir(auth_dir) == True:
for auth in os.listdir(auth_dir):
if auth == "authenticate_target":
continue
auth_file = auth_dir + "/" + auth
p = os.open(auth_file, 0)
value = os.read(p, 256)
ret = value.isspace()
if ret:
os.close(p)
continue
print "echo -n " + value.rstrip() + " > " + auth_file
os.close(p)
iqn_root = os.listdir(fabric_root)
# Loop through LIO-Target IQN list
for iqn in iqn_root:
if not os.path.isdir(fabric_root + "/" + iqn):
continue
if iqn == "lio_version":
continue
if iqn == "discovery_auth":
continue
# Loop through LIO-Target IQN+TPGT list
tpg_root = os.listdir(fabric_root + "/" + iqn);
for tpgt_tmp in tpg_root:
if tpgt_tmp == "fabric_statistics":
continue
tpgt_tmp2 = tpgt_tmp.split('_')
tpgt = tpgt_tmp2[1]
# print "#### Network portals for iSCSI Target Portal Group"
# np_root = os.listdir(fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/np")
# for np in np_root:
# print "mkdir -p " + fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/np/" + np
# Dump Nexus attribute (when available)
nexus_file = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/nexus"
if os.path.isfile(nexus_file):
print "mkdir -p " + fabric_root + "/" + iqn + "/tpgt_" + tpgt
p = os.open(nexus_file, 0)
value = os.read(p, 256)
print "echo " + value.rstrip() + " > " + nexus_file
os.close(p)
print "#### " + fabric_name + " Target Ports"
lun_root = os.listdir(fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/lun")
for lun_tmp in lun_root:
lun_tmp2 = lun_tmp.split('_')
lun = lun_tmp2[1]
lun_dir = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/lun/lun_" + lun
print "mkdir -p " + lun_dir
port_root = os.listdir(lun_dir)
for port in port_root:
if port == "alua_tg_pt_gp":
continue
if port == "alua_tg_pt_offline":
continue
if port == "alua_tg_pt_status":
continue
if port == "alua_tg_pt_write_md":
continue
if not os.path.islink(lun_dir + "/" + port):
continue
port_link = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/lun/lun_" + lun + "/" + port
sourcelink = os.readlink(port_link)
sourcelink2 = os.path.join(os.path.dirname(port_link), sourcelink)
print "ln -s " + sourcelink2 + " " + port_link
# Dump ALUA Target Port Group
tg_pt_gp_file = lun_dir + "/alua_tg_pt_gp"
p = os.open(tg_pt_gp_file, 0)
try:
value = os.read(p, 512)
except:
os.close(p)
continue
os.close(p)
if value:
tg_pt_gp_tmp = value.split('\n')
tg_pt_gp_out = tg_pt_gp_tmp[0]
off = tg_pt_gp_out.index('Alias: ')
off += 7 # Skip over "Alias: "
tg_pt_gp_name = tg_pt_gp_out[off:]
# Only need to dump if LIO-Target Port is NOT partof
# the 'default_tg_pt_gp'
if not re.search(tg_pt_gp_name, 'default_tg_pt_gp'):
print "#### ALUA Target Port Group"
print "echo " + tg_pt_gp_name + " > " + tg_pt_gp_file
#FIXME: --aluasecmd support
# print "lio_node --aluasecmd " + iqn + " " + tpgt + " " + lun
# Dump values of iscsi/iqn/tpgt/attrib/
print "#### Attributes for " + fabric_name + " Target Portal Group"
attrib_dir = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/attrib/"
attrib_root = os.listdir(attrib_dir)
for attrib in attrib_root:
attrib_file = attrib_dir + attrib
p = os.open(attrib_file, 0)
value = os.read(p, 16)
print "echo " + value.rstrip() + " > " + attrib_file
os.close(p)
# Dump values for iscsi/iqn/tpgt/param
print "#### Parameters for " + fabric_name + " Target Portal Group"
param_dir = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/param/"
param_root = os.listdir(param_dir)
for param in param_root:
param_file = param_dir + param
p = os.open(param_file, 0)
value = os.read(p, 256)
print "echo \"" + value.rstrip() + "\" > " + param_file
os.close(p)
if os.path.isfile(nexus_file):
continue
# Dump fabric Initiator Node ACLs from fabric_root/$WWN/tpgt_$TPGT/acls/
print "#### " + fabric_name + " Initiator ACLs for " + fabric_name + " Target Portal Group"
nacl_dir = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/acls/"
nacl_root = os.listdir(nacl_dir)
for nacl in nacl_root:
print "mkdir -p " + nacl_dir + nacl
# Dump fabric Initiator ACL authentication info from fabric_root/$WWN/tpgt_$TPGT/acls//$INITIATOR/auth
print "#### " + fabric_name + " Initiator ACL authentication information"
auth_dir = nacl_dir + nacl + "/auth"
for auth in os.listdir(auth_dir):
if auth == "authenticate_target":
continue
auth_file = auth_dir + "/" + auth
p = os.open(auth_file, 0)
value = os.read(p, 256)
ret = value.isspace()
if ret:
os.close(p)
continue
print "echo -n " + value.rstrip() + " > " + auth_file
os.close(p)
# Dump fabric Initiator ACL TPG attributes from fabric_root/$WWN/tpgt_$TPGT/acls/$INITIATOR/attrib
print "#### " + fabric_name + " Initiator ACL TPG attributes"
nacl_attrib_dir = nacl_dir + nacl + "/attrib"
for nacl_attrib in os.listdir(nacl_attrib_dir):
nacl_attrib_file = nacl_attrib_dir + "/" + nacl_attrib
p = os.open(nacl_attrib_file, 0)
value = os.read(p, 8)
print "echo " + value.rstrip() + " > " + nacl_attrib_file
os.close(p)
# Dump fabric Initiator LUN ACLs from fabric_root/$WWN/tpgt_$TPGT//acls/$INITIATOR/lun
print "#### " + fabric_name + " Initiator LUN ACLs for iSCSI Target Portal Group"
lun_acl_dir = nacl_dir + nacl
for lun_acl in os.listdir(lun_acl_dir):
ret = re.search('lun_', lun_acl)
if not ret:
continue
lun_link_dir = nacl_dir + nacl + "/" + lun_acl
print "mkdir -p " + lun_link_dir
for lun_acl_link in os.listdir(lun_link_dir):
if lun_acl_link == "write_protect":
p = os.open(lun_link_dir + "/write_protect", 0)
value = os.read(p, 4)
print "echo " + value.rstrip() + " > " + lun_link_dir + "/write_protect"
os.close(p)
continue
if not os.path.islink(lun_link_dir + "/" + lun_acl_link):
continue
sourcelink = os.readlink(lun_link_dir + "/" + lun_acl_link)
sourcelink2 = os.path.join(os.path.dirname(lun_link_dir + "/" + lun_acl_link), sourcelink)
print "ln -s " + sourcelink2 + " " + lun_link_dir + "/" + lun_acl_link
# Dump value of fabric_root/$WWN/tpgt_$TPGT//enable
print "#### Trigger to enable " + fabric_name + " Target Portal Group"
enable_file = fabric_root + "/" + iqn + "/tpgt_" + tpgt + "/enable"
if os.path.isfile(enable_file):
p = os.open(enable_file, 0)
value = os.read(p, 1)
print "echo " + value.rstrip() + " > " + enable_file
os.close(p)
return
def fabric_configfs_dump_all():
for fabric_name in os.listdir(target_root):
if fabric_name == "version":
continue
if fabric_name == "core":
continue
# FIXME: currently using lio_dump --stdout
if fabric_name == "iscsi":
continue
fabric_root = target_root + fabric_name
# print "Using fabric_configfs_dump_all: " + fabric_name + ", " + fabric_root
module_name = fabric_get_module_name(fabric_name)
# print "module_name: "+ module_name
fabric_configfs_dump(fabric_name, fabric_root, module_name);
return
def fabric_backup_to_file(date_time, fabric_name, fabric_root, module_name):
now = date_time
if not os.path.isdir(fabric_root):
print "Unable to access fabric_root: " + fabric_root
sys.exit(1)
current_dir = "/etc/target"
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_fabric --stdout --fabric-name=" + fabric_name + " --fabric-root=" + fabric_root + " --module-name=" + module_name
# print "Using op: " + op
p = sub.Popen(op, shell=True, stdout=sub.PIPE).stdout
if not p:
print "Unable to dump " + fabric_name + "/ConfigFS running state"
sys.exit(1)
orig_file = current_dir + "/" + fabric_name + "_start.sh"
print "Making backup of " + fabric_name + "/ConfigFS with timestamp: " + now
backup_file = backup_dir + "/" + fabric_name + "_backup-" + now + ".sh"
if os.path.isfile(backup_file):
print "" + fabric_name + " 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()
ret = shutil.copyfile(backup_file, orig_file)
if ret:
print "Unable to copy " + back_file
sys.exit(1)
print "Successfully updated default config " + orig_file
return backup_file
def fabric_backup_to_file_all(date_time):
if not os.path.isdir(target_root):
print "Unable to open target_root: " + target_root
sys.exit(1)
for fabric_name in os.listdir(target_root):
if fabric_name == "version":
continue
if fabric_name == "core":
continue
# FIXME: currently using lio_dump
if fabric_name == "iscsi":
continue
fabric_root = target_root + fabric_name
# print "Using fabric_backup_to_file: " + date_time + ", " + fabric_name + ", " + fabric_root
module_name = fabric_get_module_name(fabric_name)
# print "Using module_name: "+ module_name
fabric_backup_to_file(date_time, fabric_name, fabric_root, module_name)
return
def fabric_unload(fabric_name, fabric_root, module_name):
if not os.path.isdir(fabric_root):
print "Unable to access fabric_root: " + fabric_root
sys.exit(1)
wwn_root = os.listdir(fabric_root)
for wwn in wwn_root:
if not os.path.isdir(fabric_root + "/" + wwn):
continue
if wwn == "discovery_auth":
continue
tpg_root = fabric_root + "/" + wwn
for tpgt_tmp in os.listdir(tpg_root):
if tpgt_tmp == "fabric_statistics":
continue
tpgt_tmp2 = tpgt_tmp.split('_')
tpgt = tpgt_tmp2[1]
if os.path.isfile(fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/enable"):
disable_op = "echo 0 > " + fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/enable"
ret = os.system(disable_op)
if ret:
print "Unable to disable TPG: " + wwn + " TPGT: " + tpgt
nacl_root = fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/acls"
for nacl in os.listdir(nacl_root):
lun_acl_root = nacl_root + "/" + nacl + "/"
for lun_acl in os.listdir(lun_acl_root):
ret = re.search('lun_', lun_acl)
if not ret:
continue
mapped_lun = lun_acl[4:]
lun_link_dir = lun_acl_root + "/" + lun_acl + "/"
for lun_acl_link in os.listdir(lun_link_dir):
if lun_acl_link == "write_protect":
continue
if os.path.islink(lun_link_dir + "/" + lun_acl_link):
unlink_op = lun_link_dir + "/" + lun_acl_link
ret = os.unlink(unlink_op)
if ret:
print "Unable to unlink MappedLUN: " + lun_link_dir + "/" + lun_acl_link
dellunacl_op = "rmdir " + lun_link_dir
ret = os.system(dellunacl_op)
if ret:
print "Unable to rmdir fabric mapped_lun"
delnodeacl_op = "rmdir " + nacl_root + "/" + nacl + "/"
ret = os.system(delnodeacl_op)
if ret:
print "Unable to remove NodeACL: " + nacl_root + "/" + nacl + "/"
lun_root = fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/lun"
for lun_tmp in os.listdir(lun_root):
lun_tmp2 = lun_tmp.split('_')
lun = lun_tmp2[1]
lun_dir = lun_root + "/lun_" + lun
for port in os.listdir(lun_dir):
if not os.path.islink(lun_dir + "/" + port):
continue
unlink_op = lun_dir + "/" + port
ret = os.unlink(unlink_op)
if ret:
print "Unable to unlink fabric port/lun"
rmdir_op= "rmdir " + lun_dir
ret = os.system(rmdir_op);
if ret:
print "Unable to rmdir fabric port/lun: " + lun_dir
rmdir_op = "rmdir " + fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/"
ret = os.system(rmdir_op)
if ret:
print "Unable to rmdir fabric tpg: " + fabric_root + "/" + wwn + "/tpgt_" + tpgt + "/"
rmdir_op = "rmdir " + fabric_root + "/" + wwn + "/"
ret = os.system(rmdir_op)
if ret:
print "Unable to rmdir fabric wwn: " + fabric_root + "/" + wwn + "/"
rmdir_op = "rmdir " + fabric_root
ret = os.system(rmdir_op)
if ret:
print "Unable to release fabric_root: " + fabric_root
rmmod_op = "rmmod " + module_name
ret = os.system(rmmod_op)
if ret:
print "Unable to unload " + module_name
print "Successfully released fabric: " + fabric_root
return
def fabric_get_module_name(fabric_name):
kernel_module = ""
for specs in os.listdir(spec_root):
if specs == "README":
continue
# print "specs: " + specs + ", fabric_name: " + fabric_name
if not re.search(fabric_name + ".spec", specs) and not re.search("tcm_" + fabric_name + ".spec", specs) and not re.search(fabric_name, specs):
continue
op = "cat " + spec_root + specs
p = sub.Popen(op, shell=True, stdout=sub.PIPE).stdout
if not p:
print "Unable to dump " + fabric_name + "/ConfigFS running state"
sys.exit(1)
line = p.readline()
while line:
tmp = line.rstrip()
# Check for 'kernel_module' line in $FABRIC.spec
if re.search('kernel_module', tmp):
tmp_list = tmp.split('= ')
p.close()
return tmp_list[1]
line = p.readline()
p.close()
return kernel_module
def fabric_unloadall():
module_name = ""
try:
for fabric_name in os.listdir(target_root):
if fabric_name == "version":
continue
if fabric_name == "core":
continue
# FIXME: currently using lio_node --unload
if fabric_name == "iscsi":
continue
fabric_root = target_root + fabric_name
module_name = fabric_get_module_name(fabric_name)
#print "fabric_get_module_name() using: " + module_name
if module_name == "":
continue
fabric_unload(fabric_name, fabric_root, module_name)
except OSError, (errno, strerror):
if errno == 2:
fabric_err("%s %s\n%s" % (target_root, strerror, "Is kernel module loaded?") )
def do_work(stdout_enable, stdout_enable_all, date_time, unload, unloadall, fabric_name, fabric_root, module_name):
if not stdout_enable == "None":
fabric_configfs_dump(fabric_name, fabric_root, module_name)
elif not stdout_enable_all == "None":
fabric_configfs_dump_all()
elif not date_time == "None":
fabric_backup_to_file(date_time, fabric_name, fabric_root, module_name)
elif not unload == "None":
fabric_unload(fabric_name, fabric_root, module_name)
elif not unloadall == "None":
fabric_unloadall()
return 0
def main():
parser_fabric = optparse.OptionParser()
parser_fabric.add_option("--s","--stdout", dest='stdout_enable', action='store', nargs=0,
help="Dump running Fabric/ConfigFS syntax to STDOUT", type='string')
parser_fabric.add_option("--z","--stdoutall", dest='stdout_enable_all', action='store', nargs=0,
help="Dump all running Fabric/ConfigFS syntax to STDOUT", type='string')
parser_fabric.add_option("--t", "--tofile", dest="date_time", action='store', nargs=1,
help="Backup running Fabric/ConfigFS syntax to /etc/target/backup/fabricname_backup-<DATE_TIME>.sh",
type='string')
parser_fabric.add_option("--u", "--unload", dest="unload", action='store', nargs=0,
help="Unload running Fabric/ConfigFS", type='string')
parser_fabric.add_option("--a", "--unloadall", dest="unloadall", action='store', nargs=0,
help="Unload all running Fabric/ConfigFS", type='string')
parser_fabric.add_option("--f", "--fabric-name", dest='fabric_name', action='store', nargs=1,
help="Target fabric name", type='string')
parser_fabric.add_option("--r", "--fabric-root", dest='fabric_root', action='store', nargs=1,
help="Target fabric configfs root", type='string')
parser_fabric.add_option("--m", "--module-name", dest='module_name', action='store', nargs=1,
help="Target fabric module name ", type='string')
(opts_fabric, args_fabric) = parser_fabric.parse_args()
mandatories = ['fabric_name', 'fabric_root', 'module_name']
for m in mandatories:
if not opts_fabric.__dict__[m]:
unloadall = str(opts_fabric.__dict__['unloadall'])
stdout_enable = str(opts_fabric.__dict__['stdout_enable'])
stdout_enable_all = str(opts_fabric.__dict__['stdout_enable_all'])
date_time = str(opts_fabric.__dict__['date_time'])
if unloadall == "None" and stdout_enable == "None" and stdout_enable_all == "None" and date_time == "None":
print "mandatory option is missing\n"
parser_fabric.print_help()
exit(-1)
do_work(str(opts_fabric.stdout_enable), str(opts_fabric.stdout_enable_all),
str(opts_fabric.date_time), str(opts_fabric.unload), str(opts_fabric.unloadall),
str(opts_fabric.fabric_name), str(opts_fabric.fabric_root),
str(opts_fabric.module_name))
if __name__ == "__main__":
main()
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