This file is indexed.

/usr/sbin/tgt-setup-lun is in tgt 1:1.0.43-0ubuntu4.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
#!/bin/bash

# LUN assignment script
#
# Copyright (C) 2007 Erez Zilber <erezz@voltaire.com>
# Copyright (C) 2012 Roi Dayan <roid@mellanox.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, version 2 of the
# License.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301 USA

usage()
{
	name=$(basename $0);
	echo "usage:";
	echo -e "\t$name -n tgt_name -d dev -b bs_name -t transport -C control_port [initiator_IP1 initiator_IP2 ...]";
	echo "defaults:";
	echo -e "\tbacking store: rdwr";
	echo -e "\ttransport: iscsi";
	echo -e "\tinitiator: ALL";
	echo -e "\tcontrol port: -";
	echo "examples:";
	echo -e "\t$name -n tgt-1 -d /dev/sdb1 192.168.1.2";
	echo -e "\t$name -n tgt-2 -d /tmp/null -b null -t iser";
	echo -e "\t$name -n tgt-3 -d ~/disk3.bin -b rdwr 192.168.1.2 192.168.1.3";
}

verify_params()
{
	if ! [ "$dev" -o "$bs_type" == "null" ]; then
		echo "Error: a device is mandatory";
		exit 1;
	else
		return;
	fi

	# Make sure that the device exists
	if ! [ -b $dev -o -f $dev -o -c $dev ]; then
		echo "Error: $dev is not a device";
		exit 1;
	fi

	if ! [ "$tgt_name" ]; then
		echo "Error: target name is mandatory";
		exit 1;
	fi

	if ! [ "$lld_name" ]; then
		echo "Error: lld name empty";
		exit 1;
	fi
}

find_vacant_tgt_id()
{
	id_list=$($TGTADM --lld $lld_name --op show --mode target | grep Target | cut -d" " -f2 | sed s/://)

	next_vacant_id=1

	for id in $id_list; do
		if (($id > $next_vacant_id)); then
			break;
		else
			next_vacant_id=$((next_vacant_id+1))
		fi
	done

	return $next_vacant_id
}

find_vacant_lun()
{
	tid=$1
	tgt_found=0
	next_vacant_lun=0
	tmp_file=/tmp/target_list.txt

	$TGTADM --lld $lld_name --op show --mode target > $tmp_file

	while read line; do
		# Check if we finished going over this target
		if ((tgt_found == 1 && $(echo $line | grep -c "^Target") == 1)); then
			break
		fi

		# Check if we found the requested target
		if (($(echo $line | grep -c "Target $tid:") == 1)); then
			tgt_found=1
			continue
		fi

		if ((tgt_found == 1 && $(echo $line | grep -c "LUN:") == 1)); then
			curr_lun=$(echo $line | cut -d" " -f2)
			if (($curr_lun > $next_vacant_lun)); then
				break
			else
				next_vacant_lun=$((next_vacant_lun+1))
			fi
		fi
	done < $tmp_file

	rm -f $tmp_file

	if ((tgt_found == 0)); then
		echo "Error: could not find a LUN for target $tid"
		return -1
	fi

	return $next_vacant_lun
}

get_acl() {
	tid=$1
	tgt_found=0
	acl_found=0
	next_vacant_lun=0
	tmp_file=/tmp/target_list.txt
	local _acl=""

	$TGTADM --lld $lld_name --op show --mode target > $tmp_file

	while read line; do
		# Check if we finished going over this target
		if ((tgt_found == 1 && $(echo $line | grep -c "^Target") == 1)); then
			break
		fi

		# Check if we found the requested target
		if (($(echo $line | grep -c "Target $tid:") == 1)); then
			tgt_found=1
			continue
		fi

		if ((tgt_found == 1 && $(echo $line | grep -c "ACL information") == 1)); then
			acl_found=1
			continue
		fi

		if ((tgt_found == 1 && acl_found == 1)); then
			curr_acl=$(echo $line)
			_acl=`echo $_acl $curr_acl`
		fi
	done < $tmp_file

	rm -f $tmp_file

	echo $_acl
}

err_exit()
{
	if ((new_tgt == 0)); then
		exit 1
	fi

	echo "Deleting new target, tid=$tid"
	$TGTADM --lld $lld_name --op delete --mode target --tid $tid
	res=$?

	if [ $res -ne 0 ]; then
		echo "Error: failed to delete target, tid=$tid"
	fi

	exit 1
}

check_if_tgt_exists()
{
	tgt_list=$($TGTADM --lld $lld_name --op show --mode target | grep Target | cut -d" " -f3)

	for curr_tgt in $tgt_list; do
		if [ $tgt_name = $curr_tgt ]; then
			return 1
		fi
	done

	return 0
}

if [ $# -eq 0 ]; then
	usage
	exit 1
fi

TGTADM="tgtadm"
lld_name="iscsi"
control_port=""

while getopts "d:n:b:t:h:C:" opt
do
	case ${opt} in
	d)
		dev=$OPTARG;;
	n)
		tgt_name=$OPTARG;;
	b)
		bs_type=$OPTARG;;
	t)
		lld_name=$OPTARG;;
        C)
                control_port=$OPTARG;;
	h*)
		usage
		exit 1
	esac
done

shift $(($OPTIND - 1))

initiators=$*

verify_params

# Check if tgtd is running (we should have 2 daemons)
tgtd_count=`pidof tgtd | wc -w`
if [ $tgtd_count -lt 1 ]; then
	echo "tgtd is not running"
	echo "Exiting..."
	exit 1
fi

if [ -n "$control_port" ]; then
    echo "Control port: $control_port"
    TGTADM="$TGTADM -C $control_port"
fi

echo "Using transport: $lld_name"

if ! [[ $tgt_name =~ ^iqn ]]; then
    tgt_name="iqn.2001-04.com.$(hostname -s)-$tgt_name"
fi

# Make sure that a target with the same name doesn't exist
check_if_tgt_exists
if [ $? -eq 1 ]; then
	echo "Error: target named $tgt_name already exists"
	read -p "Add a new lun to the existing target? (yes/NO): " add_lun
	if [ "$add_lun" != "yes" ]; then
		exit 1
	fi
	tid=$($TGTADM --lld $lld_name --op show --mode target | grep $tgt_name | cut -d" " -f2)
	tid=${tid%:}
	new_tgt=0
else
	find_vacant_tgt_id
	tid=$?

	# Create the new target
	echo "Creating new target (name=$tgt_name, tid=$tid)"
	$TGTADM --lld $lld_name --op new --mode target --tid $tid -T $tgt_name
	res=$?

	if [ $res -ne 0 ]; then
		echo "Error: failed to create target (name=$tgt_name, tid=$tid)"
		exit 1
	fi
	new_tgt=1
fi

find_vacant_lun $tid
lun=$?

# Add a logical unit to the target
echo "Adding a logical unit ($dev) to target, tid=$tid"
if [ $bs_type ]; then
	echo "Setting backing store type: $bs_type"
	bs_opt="-E $bs_type"
fi
$TGTADM --lld $lld_name --op new --mode logicalunit --tid $tid --lun $lun -b $dev $bs_opt
res=$?

if [ $res -ne 0 ]; then
	echo "Error: failed to add a logical unit ($dev) to target, tid=$tid"
	err_exit
fi

# Define which initiators can use this target
tgt_acl=`get_acl $tid`
if test "$initiators" ; then
	# Allow access only for specific initiators
	echo "Accepting connections from $initiators"
	for initiator in $initiators; do
		# Check if record already exists
		if ((`echo $tgt_acl | grep -c "\b$initiator\b"` == 1)) ; then
			continue
		fi

		$TGTADM --lld $lld_name --op bind --mode target --tid $tid -I $initiator
		res=$?

		if [ $res -ne 0 ]; then
			echo "Error: could not assign initiator $initiator to the target"
		fi
	done
else
	# Check if record already exists
	if ((`echo $tgt_acl | grep -c "\bALL\b"` == 1)) ; then
		exit 0
	fi

	# Allow access for everyone
	echo "Accepting connections from all initiators"
	$TGTADM --lld $lld_name --op bind --mode target --tid $tid -I ALL
	res=$?

	if [ $res -ne 0 ]; then
		echo "Error: failed to set access for all initiators"
		err_exit
	fi
fi