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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/target/iscsi/iscsi_target.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*******************************************************************************
23  * This file contains main functions related to the iSCSI Target Core Driver.
34  *
....@@ -5,15 +6,6 @@
56  *
67  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
78  *
8
- * This program is free software; you can redistribute it and/or modify
9
- * it under the terms of the GNU General Public License as published by
10
- * the Free Software Foundation; either version 2 of the License, or
11
- * (at your option) any later version.
12
- *
13
- * This program is distributed in the hope that it will be useful,
14
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
- * GNU General Public License for more details.
179  ******************************************************************************/
1810 
1911 #include <crypto/hash.h>
....@@ -308,15 +300,14 @@
308300 	return false;
309301 }
310302 
311
-/*
312
- * Called with mutex np_lock held
313
- */
314303 static struct iscsi_np *iscsit_get_np(
315304 	struct sockaddr_storage *sockaddr,
316305 	int network_transport)
317306 {
318307 	struct iscsi_np *np;
319308 	bool match;
309
+
310
+	lockdep_assert_held(&np_lock);
320311 
321312 	list_for_each_entry(np, &g_np_list, np_list) {
322313 		spin_lock_bh(&np->np_thread_lock);
....@@ -573,7 +564,8 @@
573564 	return 0;
574565 }
575566 
576
-static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32);
567
+static int iscsit_map_iovec(struct iscsi_cmd *cmd, struct kvec *iov, int nvec,
568
+			    u32 data_offset, u32 data_length);
577569 static void iscsit_unmap_iovec(struct iscsi_cmd *);
578570 static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *,
579571 				    u32, u32, u32, u8 *);
....@@ -604,7 +596,8 @@
604596 			 *header_digest);
605597 	}
606598 
607
-	iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1],
599
+	iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[iov_count],
600
+				   cmd->orig_iov_data_count - (iov_count + 2),
608601 				   datain->offset, datain->length);
609602 	if (iov_ret < 0)
610603 		return -1;
....@@ -713,7 +706,7 @@
713706 			sizeof(struct iscsi_queue_req),
714707 			__alignof__(struct iscsi_queue_req), 0, NULL);
715708 	if (!lio_qr_cache) {
716
-		pr_err("nable to kmem_cache_create() for"
709
+		pr_err("Unable to kmem_cache_create() for"
717710 				" lio_qr_cache\n");
718711 		goto bitmap_out;
719712 	}
....@@ -886,13 +879,10 @@
886879  * Map some portion of the allocated scatterlist to an iovec, suitable for
887880  * kernel sockets to copy data in/out.
888881  */
889
-static int iscsit_map_iovec(
890
-	struct iscsi_cmd *cmd,
891
-	struct kvec *iov,
892
-	u32 data_offset,
893
-	u32 data_length)
882
+static int iscsit_map_iovec(struct iscsi_cmd *cmd, struct kvec *iov, int nvec,
883
+			    u32 data_offset, u32 data_length)
894884 {
895
-	u32 i = 0;
885
+	u32 i = 0, orig_data_length = data_length;
896886 	struct scatterlist *sg;
897887 	unsigned int page_off;
898888 
....@@ -901,9 +891,12 @@
901891 	 */
902892 	u32 ent = data_offset / PAGE_SIZE;
903893 
894
+	if (!data_length)
895
+		return 0;
896
+
904897 	if (ent >= cmd->se_cmd.t_data_nents) {
905898 		pr_err("Initial page entry out-of-bounds\n");
906
-		return -1;
899
+		goto overflow;
907900 	}
908901 
909902 	sg = &cmd->se_cmd.t_data_sg[ent];
....@@ -913,7 +906,12 @@
913906 	cmd->first_data_sg_off = page_off;
914907 
915908 	while (data_length) {
916
-		u32 cur_len = min_t(u32, data_length, sg->length - page_off);
909
+		u32 cur_len;
910
+
911
+		if (WARN_ON_ONCE(!sg || i >= nvec))
912
+			goto overflow;
913
+
914
+		cur_len = min_t(u32, data_length, sg->length - page_off);
917915 
918916 		iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off;
919917 		iov[i].iov_len = cur_len;
....@@ -927,6 +925,16 @@
927925 	cmd->kmapped_nents = i;
928926 
929927 	return i;
928
+
929
+overflow:
930
+	pr_err("offset %d + length %d overflow; %d/%d; sg-list:\n",
931
+	       data_offset, orig_data_length, i, nvec);
932
+	for_each_sg(cmd->se_cmd.t_data_sg, sg,
933
+		    cmd->se_cmd.t_data_nents, i) {
934
+		pr_err("[%d] off %d len %d\n",
935
+		       i, sg->offset, sg->length);
936
+	}
937
+	return -1;
930938 }
931939 
932940 static void iscsit_unmap_iovec(struct iscsi_cmd *cmd)
....@@ -1149,7 +1157,7 @@
11491157 	transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops,
11501158 			conn->sess->se_sess, be32_to_cpu(hdr->data_length),
11511159 			cmd->data_direction, sam_task_attr,
1152
-			cmd->sense_buffer + 2);
1160
+			cmd->sense_buffer + 2, scsilun_to_int(&hdr->lun));
11531161 
11541162 	pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
11551163 		" ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
....@@ -1158,22 +1166,24 @@
11581166 
11591167 	target_get_sess_cmd(&cmd->se_cmd, true);
11601168 
1161
-	cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd,
1162
-						     scsilun_to_int(&hdr->lun));
1163
-	if (cmd->sense_reason)
1164
-		goto attach_cmd;
1165
-
1166
-	/* only used for printks or comparing with ->ref_task_tag */
11671169 	cmd->se_cmd.tag = (__force u32)cmd->init_task_tag;
1168
-	cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb);
1170
+	cmd->sense_reason = target_cmd_init_cdb(&cmd->se_cmd, hdr->cdb);
11691171 	if (cmd->sense_reason) {
11701172 		if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) {
11711173 			return iscsit_add_reject_cmd(cmd,
1172
-					ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
1174
+				ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
11731175 		}
11741176 
11751177 		goto attach_cmd;
11761178 	}
1179
+
1180
+	cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd);
1181
+	if (cmd->sense_reason)
1182
+		goto attach_cmd;
1183
+
1184
+	cmd->sense_reason = target_cmd_parse_cdb(&cmd->se_cmd);
1185
+	if (cmd->sense_reason)
1186
+		goto attach_cmd;
11771187 
11781188 	if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) {
11791189 		return iscsit_add_reject_cmd(cmd,
....@@ -1194,7 +1204,7 @@
11941204 }
11951205 EXPORT_SYMBOL(iscsit_setup_scsi_cmd);
11961206 
1197
-void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd)
1207
+void iscsit_set_unsolicited_dataout(struct iscsi_cmd *cmd)
11981208 {
11991209 	iscsit_set_dataout_sequence_values(cmd);
12001210 
....@@ -1202,7 +1212,7 @@
12021212 	iscsit_start_dataout_timer(cmd, cmd->conn);
12031213 	spin_unlock_bh(&cmd->dataout_timeout_lock);
12041214 }
1205
-EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout);
1215
+EXPORT_SYMBOL(iscsit_set_unsolicited_dataout);
12061216 
12071217 int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
12081218 			    struct iscsi_scsi_req *hdr)
....@@ -1236,7 +1246,7 @@
12361246 	 */
12371247 	if (!cmd->immediate_data) {
12381248 		if (!cmd->sense_reason && cmd->unsolicited_data)
1239
-			iscsit_set_unsoliticed_dataout(cmd);
1249
+			iscsit_set_unsolicited_dataout(cmd);
12401250 		if (!cmd->sense_reason)
12411251 			return 0;
12421252 
....@@ -1268,27 +1278,27 @@
12681278 			  bool dump_payload)
12691279 {
12701280 	int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
1281
+	int rc;
1282
+
12711283 	/*
12721284 	 * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
12731285 	 */
1274
-	if (dump_payload)
1275
-		goto after_immediate_data;
1276
-	/*
1277
-	 * Check for underflow case where both EDTL and immediate data payload
1278
-	 * exceeds what is presented by CDB's TRANSFER LENGTH, and what has
1279
-	 * already been set in target_cmd_size_check() as se_cmd->data_length.
1280
-	 *
1281
-	 * For this special case, fail the command and dump the immediate data
1282
-	 * payload.
1283
-	 */
1284
-	if (cmd->first_burst_len > cmd->se_cmd.data_length) {
1285
-		cmd->sense_reason = TCM_INVALID_CDB_FIELD;
1286
-		goto after_immediate_data;
1286
+	if (dump_payload) {
1287
+		u32 length = min(cmd->se_cmd.data_length - cmd->write_data_done,
1288
+				 cmd->first_burst_len);
1289
+
1290
+		pr_debug("Dumping min(%d - %d, %d) = %d bytes of immediate data\n",
1291
+			 cmd->se_cmd.data_length, cmd->write_data_done,
1292
+			 cmd->first_burst_len, length);
1293
+		rc = iscsit_dump_data_payload(cmd->conn, length, 1);
1294
+		pr_debug("Finished dumping immediate data\n");
1295
+		if (rc < 0)
1296
+			immed_ret = IMMEDIATE_DATA_CANNOT_RECOVER;
1297
+	} else {
1298
+		immed_ret = iscsit_handle_immediate_data(cmd, hdr,
1299
+							 cmd->first_burst_len);
12871300 	}
12881301 
1289
-	immed_ret = iscsit_handle_immediate_data(cmd, hdr,
1290
-					cmd->first_burst_len);
1291
-after_immediate_data:
12921302 	if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) {
12931303 		/*
12941304 		 * A PDU/CmdSN carrying Immediate Data passed
....@@ -1301,14 +1311,11 @@
13011311 			return -1;
13021312 
13031313 		if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) {
1304
-			int rc;
1305
-
1306
-			rc = iscsit_dump_data_payload(cmd->conn,
1307
-						      cmd->first_burst_len, 1);
13081314 			target_put_sess_cmd(&cmd->se_cmd);
1309
-			return rc;
1315
+
1316
+			return 0;
13101317 		} else if (cmd->unsolicited_data)
1311
-			iscsit_set_unsoliticed_dataout(cmd);
1318
+			iscsit_set_unsolicited_dataout(cmd);
13121319 
13131320 	} else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) {
13141321 		/*
....@@ -1505,8 +1512,6 @@
15051512 			if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
15061513 				iscsit_stop_dataout_timer(cmd);
15071514 
1508
-			transport_check_aborted_status(se_cmd,
1509
-					(hdr->flags & ISCSI_FLAG_CMD_FINAL));
15101515 			return iscsit_dump_data_payload(conn, payload_length, 1);
15111516 		}
15121517 	} else {
....@@ -1521,12 +1526,9 @@
15211526 		 * TASK_ABORTED status.
15221527 		 */
15231528 		if (se_cmd->transport_state & CMD_T_ABORTED) {
1524
-			if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
1525
-				if (--cmd->outstanding_r2ts < 1) {
1526
-					iscsit_stop_dataout_timer(cmd);
1527
-					transport_check_aborted_status(
1528
-							se_cmd, 1);
1529
-				}
1529
+			if (hdr->flags & ISCSI_FLAG_CMD_FINAL &&
1530
+			    --cmd->outstanding_r2ts < 1)
1531
+				iscsit_stop_dataout_timer(cmd);
15301532 
15311533 			return iscsit_dump_data_payload(conn, payload_length, 1);
15321534 		}
....@@ -1586,14 +1588,16 @@
15861588 {
15871589 	struct kvec *iov;
15881590 	u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0;
1589
-	u32 payload_length = ntoh24(hdr->dlength);
1591
+	u32 payload_length;
15901592 	int iov_ret, data_crc_failed = 0;
15911593 
1594
+	payload_length = min_t(u32, cmd->se_cmd.data_length,
1595
+			       ntoh24(hdr->dlength));
15921596 	rx_size += payload_length;
15931597 	iov = &cmd->iov_data[0];
15941598 
1595
-	iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset),
1596
-				   payload_length);
1599
+	iov_ret = iscsit_map_iovec(cmd, iov, cmd->orig_iov_data_count - 2,
1600
+				   be32_to_cpu(hdr->offset), payload_length);
15971601 	if (iov_ret < 0)
15981602 		return -1;
15991603 
....@@ -1613,6 +1617,7 @@
16131617 		rx_size += ISCSI_CRC_LEN;
16141618 	}
16151619 
1620
+	WARN_ON_ONCE(iov_count > cmd->orig_iov_data_count);
16161621 	rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
16171622 
16181623 	iscsit_unmap_iovec(cmd);
....@@ -1878,6 +1883,7 @@
18781883 			rx_size += ISCSI_CRC_LEN;
18791884 		}
18801885 
1886
+		WARN_ON_ONCE(niov > ARRAY_SIZE(cmd->iov_misc));
18811887 		rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size);
18821888 		if (rx_got != rx_size) {
18831889 			ret = -1;
....@@ -2008,7 +2014,8 @@
20082014 
20092015 	transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops,
20102016 			      conn->sess->se_sess, 0, DMA_NONE,
2011
-			      TCM_SIMPLE_TAG, cmd->sense_buffer + 2);
2017
+			      TCM_SIMPLE_TAG, cmd->sense_buffer + 2,
2018
+			      scsilun_to_int(&hdr->lun));
20122019 
20132020 	target_get_sess_cmd(&cmd->se_cmd, true);
20142021 
....@@ -2046,8 +2053,7 @@
20462053 	 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
20472054 	 */
20482055 	if (function != ISCSI_TM_FUNC_TASK_REASSIGN) {
2049
-		ret = transport_lookup_tmr_lun(&cmd->se_cmd,
2050
-					       scsilun_to_int(&hdr->lun));
2056
+		ret = transport_lookup_tmr_lun(&cmd->se_cmd);
20512057 		if (ret < 0) {
20522058 			se_tmr->response = ISCSI_TMF_RSP_NO_LUN;
20532059 			goto attach;
....@@ -2197,24 +2203,22 @@
21972203 		}
21982204 		goto empty_sendtargets;
21992205 	}
2200
-	if (strncmp("SendTargets", text_in, 11) != 0) {
2206
+	if (strncmp("SendTargets=", text_in, 12) != 0) {
22012207 		pr_err("Received Text Data that is not"
22022208 			" SendTargets, cannot continue.\n");
22032209 		goto reject;
22042210 	}
2211
+	/* '=' confirmed in strncmp */
22052212 	text_ptr = strchr(text_in, '=');
2206
-	if (!text_ptr) {
2207
-		pr_err("No \"=\" separator found in Text Data,"
2208
-			"  cannot continue.\n");
2209
-		goto reject;
2210
-	}
2211
-	if (!strncmp("=All", text_ptr, 4)) {
2213
+	BUG_ON(!text_ptr);
2214
+	if (!strncmp("=All", text_ptr, 5)) {
22122215 		cmd->cmd_flags |= ICF_SENDTARGETS_ALL;
22132216 	} else if (!strncmp("=iqn.", text_ptr, 5) ||
22142217 		   !strncmp("=eui.", text_ptr, 5)) {
22152218 		cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE;
22162219 	} else {
2217
-		pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
2220
+		pr_err("Unable to locate valid SendTargets%s value\n",
2221
+		       text_ptr);
22182222 		goto reject;
22192223 	}
22202224 
....@@ -2258,42 +2262,40 @@
22582262 	rx_size = payload_length;
22592263 	if (payload_length) {
22602264 		u32 checksum = 0, data_crc = 0;
2261
-		u32 padding = 0, pad_bytes = 0;
2265
+		u32 padding = 0;
22622266 		int niov = 0, rx_got;
2263
-		struct kvec iov[3];
2267
+		struct kvec iov[2];
22642268 
2265
-		text_in = kzalloc(payload_length, GFP_KERNEL);
2269
+		rx_size = ALIGN(payload_length, 4);
2270
+		text_in = kzalloc(rx_size, GFP_KERNEL);
22662271 		if (!text_in)
22672272 			goto reject;
22682273 
22692274 		cmd->text_in_ptr = text_in;
22702275 
2271
-		memset(iov, 0, 3 * sizeof(struct kvec));
2276
+		memset(iov, 0, sizeof(iov));
22722277 		iov[niov].iov_base	= text_in;
2273
-		iov[niov++].iov_len	= payload_length;
2278
+		iov[niov++].iov_len	= rx_size;
22742279 
2275
-		padding = ((-payload_length) & 3);
2276
-		if (padding != 0) {
2277
-			iov[niov].iov_base = &pad_bytes;
2278
-			iov[niov++].iov_len  = padding;
2279
-			rx_size += padding;
2280
+		padding = rx_size - payload_length;
2281
+		if (padding)
22802282 			pr_debug("Receiving %u additional bytes"
22812283 					" for padding.\n", padding);
2282
-		}
22832284 		if (conn->conn_ops->DataDigest) {
22842285 			iov[niov].iov_base	= &checksum;
22852286 			iov[niov++].iov_len	= ISCSI_CRC_LEN;
22862287 			rx_size += ISCSI_CRC_LEN;
22872288 		}
22882289 
2290
+		WARN_ON_ONCE(niov > ARRAY_SIZE(iov));
22892291 		rx_got = rx_data(conn, &iov[0], niov, rx_size);
22902292 		if (rx_got != rx_size)
22912293 			goto reject;
22922294 
22932295 		if (conn->conn_ops->DataDigest) {
2294
-			iscsit_do_crypto_hash_buf(conn->conn_rx_hash, text_in,
2295
-						  payload_length, padding,
2296
-						  &pad_bytes, &data_crc);
2296
+			iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
2297
+						  text_in, rx_size, 0, NULL,
2298
+						  &data_crc);
22972299 
22982300 			if (checksum != data_crc) {
22992301 				pr_err("Text data CRC32C DataDigest"
....@@ -2596,14 +2598,34 @@
25962598 	u32 checksum, iov_count = 0, padding = 0;
25972599 	struct iscsi_conn *conn = cmd->conn;
25982600 	struct kvec *iov;
2601
+	void *overflow_buf = NULL;
25992602 
2600
-	iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length);
2603
+	BUG_ON(cmd->write_data_done > cmd->se_cmd.data_length);
2604
+	rx_size = min(cmd->se_cmd.data_length - cmd->write_data_done, length);
2605
+	iov_ret = iscsit_map_iovec(cmd, cmd->iov_data,
2606
+				   cmd->orig_iov_data_count - 2,
2607
+				   cmd->write_data_done, rx_size);
26012608 	if (iov_ret < 0)
26022609 		return IMMEDIATE_DATA_CANNOT_RECOVER;
26032610 
2604
-	rx_size = length;
26052611 	iov_count = iov_ret;
26062612 	iov = &cmd->iov_data[0];
2613
+	if (rx_size < length) {
2614
+		/*
2615
+		 * Special case: length of immediate data exceeds the data
2616
+		 * buffer size derived from the CDB.
2617
+		 */
2618
+		overflow_buf = kmalloc(length - rx_size, GFP_KERNEL);
2619
+		if (!overflow_buf) {
2620
+			iscsit_unmap_iovec(cmd);
2621
+			return IMMEDIATE_DATA_CANNOT_RECOVER;
2622
+		}
2623
+		cmd->overflow_buf = overflow_buf;
2624
+		iov[iov_count].iov_base = overflow_buf;
2625
+		iov[iov_count].iov_len = length - rx_size;
2626
+		iov_count++;
2627
+		rx_size = length;
2628
+	}
26072629 
26082630 	padding = ((-length) & 3);
26092631 	if (padding != 0) {
....@@ -2618,6 +2640,7 @@
26182640 		rx_size += ISCSI_CRC_LEN;
26192641 	}
26202642 
2643
+	WARN_ON_ONCE(iov_count > cmd->orig_iov_data_count);
26212644 	rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size);
26222645 
26232646 	iscsit_unmap_iovec(cmd);
....@@ -2672,9 +2695,6 @@
26722695 	return IMMEDIATE_DATA_NORMAL_OPERATION;
26732696 }
26742697 
2675
-/*
2676
- *	Called with sess->conn_lock held.
2677
- */
26782698 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
26792699 	with active network interface */
26802700 static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn)
....@@ -2682,6 +2702,8 @@
26822702 	struct iscsi_cmd *cmd;
26832703 	struct iscsi_conn *conn_p;
26842704 	bool found = false;
2705
+
2706
+	lockdep_assert_held(&conn->sess->conn_lock);
26852707 
26862708 	/*
26872709 	 * Only send a Asynchronous Message on connections whos network
....@@ -3143,6 +3165,12 @@
31433165 				else
31443166 					xfer_len = conn->sess->sess_ops->MaxBurstLength;
31453167 			}
3168
+
3169
+			if ((s32)xfer_len < 0) {
3170
+				cmd->cmd_flags |= ICF_SENT_LAST_R2T;
3171
+				break;
3172
+			}
3173
+
31463174 			cmd->r2t_offset += xfer_len;
31473175 
31483176 			if (cmd->r2t_offset == cmd->se_cmd.data_length)
....@@ -3723,7 +3751,7 @@
37233751 	case ISTATE_SEND_LOGOUTRSP:
37243752 		if (!iscsit_logout_post_handler(cmd, conn))
37253753 			return -ECONNRESET;
3726
-		/* fall through */
3754
+		fallthrough;
37273755 	case ISTATE_SEND_STATUS:
37283756 	case ISTATE_SEND_ASYNCMSG:
37293757 	case ISTATE_SEND_NOPIN:
....@@ -4371,8 +4399,7 @@
43714399 	 * restart the timer and exit.
43724400 	 */
43734401 	if (!in_interrupt()) {
4374
-		if (iscsit_check_session_usage_count(sess) == 1)
4375
-			iscsit_stop_session(sess, 1, 1);
4402
+		iscsit_check_session_usage_count(sess);
43764403 	} else {
43774404 		if (iscsit_check_session_usage_count(sess) == 2) {
43784405 			atomic_set(&sess->session_logout, 0);
....@@ -4384,7 +4411,7 @@
43844411 	transport_deregister_session(sess->se_sess);
43854412 
43864413 	if (sess->sess_ops->ErrorRecoveryLevel == 2)
4387
-		iscsit_free_connection_recovery_entires(sess);
4414
+		iscsit_free_connection_recovery_entries(sess);
43884415 
43894416 	iscsit_free_all_ooo_cmdsns(sess);
43904417 
....@@ -4510,7 +4537,6 @@
45104537 			iscsit_logout_post_handler_closesession(conn);
45114538 			break;
45124539 		}
4513
-		ret = 0;
45144540 		break;
45154541 	case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
45164542 		if (conn->cid == cmd->logout_cid) {
....@@ -4521,7 +4547,6 @@
45214547 				iscsit_logout_post_handler_samecid(conn);
45224548 				break;
45234549 			}
4524
-			ret = 0;
45254550 		} else {
45264551 			switch (cmd->logout_response) {
45274552 			case ISCSI_LOGOUT_SUCCESS: