1 files changed, 86 insertions, 147 deletions

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index baf4da7bb3b4..a2dde08c8a62 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -8,7 +8,7 @@
  *
  ******************************************************************************/
 
-#include <crypto/hash.h>
+#include <linux/crc32c.h>
 #include <linux/string.h>
 #include <linux/kthread.h>
 #include <linux/completion.h>
@@ -17,7 +17,7 @@
 #include <linux/idr.h>
 #include <linux/delay.h>
 #include <linux/sched/signal.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
 #include <linux/inet.h>
 #include <net/ipv6.h>
 #include <scsi/scsi_proto.h>
@@ -26,6 +26,7 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 
+#include <target/target_core_backend.h>
 #include <target/iscsi/iscsi_target_core.h>
 #include "iscsi_target_parameters.h"
 #include "iscsi_target_seq_pdu_list.h"
@@ -363,8 +364,6 @@ struct iscsi_np *iscsit_add_np(
 	init_completion(&np->np_restart_comp);
 	INIT_LIST_HEAD(&np->np_list);
 
-	timer_setup(&np->np_login_timer, iscsi_handle_login_thread_timeout, 0);
-
 	ret = iscsi_target_setup_login_socket(np, sockaddr);
 	if (ret != 0) {
 		kfree(np);
@@ -491,8 +490,8 @@ void iscsit_aborted_task(struct iscsit_conn *conn, struct iscsit_cmd *cmd)
 }
 EXPORT_SYMBOL(iscsit_aborted_task);
 
-static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *,
-				      u32, u32, const void *, void *);
+static u32 iscsit_crc_buf(const void *buf, u32 payload_length,
+			  u32 padding, const void *pad_bytes);
 static void iscsit_tx_thread_wait_for_tcp(struct iscsit_conn *);
 
 static int
@@ -511,9 +510,7 @@ iscsit_xmit_nondatain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
-					  ISCSI_HDR_LEN, 0, NULL,
-					  header_digest);
+		*header_digest = iscsit_crc_buf(hdr, ISCSI_HDR_LEN, 0, NULL);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
@@ -538,11 +535,9 @@ iscsit_xmit_nondatain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 		}
 
 		if (conn->conn_ops->DataDigest) {
-			iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
-						  data_buf, data_buf_len,
-						  padding, &cmd->pad_bytes,
-						  &cmd->data_crc);
-
+			cmd->data_crc = iscsit_crc_buf(data_buf, data_buf_len,
+						       padding,
+						       &cmd->pad_bytes);
 			iov[niov].iov_base = &cmd->data_crc;
 			iov[niov++].iov_len = ISCSI_CRC_LEN;
 			tx_size += ISCSI_CRC_LEN;
@@ -567,8 +562,8 @@ iscsit_xmit_nondatain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 static int iscsit_map_iovec(struct iscsit_cmd *cmd, struct kvec *iov, int nvec,
 			    u32 data_offset, u32 data_length);
 static void iscsit_unmap_iovec(struct iscsit_cmd *);
-static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsit_cmd *,
-				    u32, u32, u32, u8 *);
+static u32 iscsit_crc_sglist(const struct iscsit_cmd *cmd, u32 data_length,
+			     u32 padding, const u8 *pad_bytes);
 static int
 iscsit_xmit_datain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 		       const struct iscsi_datain *datain)
@@ -585,10 +580,8 @@ iscsit_xmit_datain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
-					  ISCSI_HDR_LEN, 0, NULL,
-					  header_digest);
-
+		*header_digest = iscsit_crc_buf(cmd->pdu, ISCSI_HDR_LEN, 0,
+						NULL);
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
 
@@ -615,12 +608,8 @@ iscsit_xmit_datain_pdu(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	}
 
 	if (conn->conn_ops->DataDigest) {
-		cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash,
-							 cmd, datain->offset,
-							 datain->length,
-							 cmd->padding,
-							 cmd->pad_bytes);
-
+		cmd->data_crc = iscsit_crc_sglist(cmd, datain->length,
+						  cmd->padding, cmd->pad_bytes);
 		iov[iov_count].iov_base	= &cmd->data_crc;
 		iov[iov_count++].iov_len = ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
@@ -1190,9 +1179,10 @@ int iscsit_setup_scsi_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
 	 */
 	__target_init_cmd(&cmd->se_cmd, &iscsi_ops,
-			 conn->sess->se_sess, be32_to_cpu(hdr->data_length),
-			 cmd->data_direction, sam_task_attr,
-			 cmd->sense_buffer + 2, scsilun_to_int(&hdr->lun));
+			  conn->sess->se_sess, be32_to_cpu(hdr->data_length),
+			  cmd->data_direction, sam_task_attr,
+			  cmd->sense_buffer + 2, scsilun_to_int(&hdr->lun),
+			  conn->cmd_cnt);
 
 	pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
 		" ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
@@ -1234,12 +1224,6 @@ attach_cmd:
 	spin_lock_bh(&conn->cmd_lock);
 	list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
 	spin_unlock_bh(&conn->cmd_lock);
-	/*
-	 * Check if we need to delay processing because of ALUA
-	 * Active/NonOptimized primary access state..
-	 */
-	core_alua_check_nonop_delay(&cmd->se_cmd);
-
 	return 0;
 }
 EXPORT_SYMBOL(iscsit_setup_scsi_cmd);
@@ -1410,77 +1394,45 @@ iscsit_handle_scsi_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	return iscsit_get_immediate_data(cmd, hdr, dump_payload);
 }
 
-static u32 iscsit_do_crypto_hash_sg(
-	struct ahash_request *hash,
-	struct iscsit_cmd *cmd,
-	u32 data_offset,
-	u32 data_length,
-	u32 padding,
-	u8 *pad_bytes)
+static u32 iscsit_crc_sglist(const struct iscsit_cmd *cmd, u32 data_length,
+			     u32 padding, const u8 *pad_bytes)
 {
-	u32 data_crc;
-	struct scatterlist *sg;
-	unsigned int page_off;
-
-	crypto_ahash_init(hash);
-
-	sg = cmd->first_data_sg;
-	page_off = cmd->first_data_sg_off;
-
-	if (data_length && page_off) {
-		struct scatterlist first_sg;
-		u32 len = min_t(u32, data_length, sg->length - page_off);
-
-		sg_init_table(&first_sg, 1);
-		sg_set_page(&first_sg, sg_page(sg), len, sg->offset + page_off);
-
-		ahash_request_set_crypt(hash, &first_sg, NULL, len);
-		crypto_ahash_update(hash);
-
-		data_length -= len;
-		sg = sg_next(sg);
-	}
+	struct scatterlist *sg = cmd->first_data_sg;
+	unsigned int page_off = cmd->first_data_sg_off;
+	u32 crc = ~0;
 
 	while (data_length) {
-		u32 cur_len = min_t(u32, data_length, sg->length);
+		u32 cur_len = min_t(u32, data_length, sg->length - page_off);
+		const void *virt;
 
-		ahash_request_set_crypt(hash, sg, NULL, cur_len);
-		crypto_ahash_update(hash);
+		virt = kmap_local_page(sg_page(sg)) + sg->offset + page_off;
+		crc = crc32c(crc, virt, cur_len);
+		kunmap_local(virt);
 
-		data_length -= cur_len;
 		/* iscsit_map_iovec has already checked for invalid sg pointers */
 		sg = sg_next(sg);
-	}
 
-	if (padding) {
-		struct scatterlist pad_sg;
-
-		sg_init_one(&pad_sg, pad_bytes, padding);
-		ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc,
-					padding);
-		crypto_ahash_finup(hash);
-	} else {
-		ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0);
-		crypto_ahash_final(hash);
+		page_off = 0;
+		data_length -= cur_len;
 	}
 
-	return data_crc;
+	if (padding)
+		crc = crc32c(crc, pad_bytes, padding);
+
+	return ~crc;
 }
 
-static void iscsit_do_crypto_hash_buf(struct ahash_request *hash,
-	const void *buf, u32 payload_length, u32 padding,
-	const void *pad_bytes, void *data_crc)
+static u32 iscsit_crc_buf(const void *buf, u32 payload_length,
+			  u32 padding, const void *pad_bytes)
 {
-	struct scatterlist sg[2];
+	u32 crc = ~0;
 
-	sg_init_table(sg, ARRAY_SIZE(sg));
-	sg_set_buf(sg, buf, payload_length);
-	if (padding)
-		sg_set_buf(sg + 1, pad_bytes, padding);
+	crc = crc32c(crc, buf, payload_length);
 
-	ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding);
+	if (padding)
+		crc = crc32c(crc, pad_bytes, padding);
 
-	crypto_ahash_digest(hash);
+	return ~crc;
 }
 
 int
@@ -1668,11 +1620,8 @@ iscsit_get_dataout(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	if (conn->conn_ops->DataDigest) {
 		u32 data_crc;
 
-		data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
-						    be32_to_cpu(hdr->offset),
-						    payload_length, padding,
-						    cmd->pad_bytes);
-
+		data_crc = iscsit_crc_sglist(cmd, payload_length, padding,
+					     cmd->pad_bytes);
 		if (checksum != data_crc) {
 			pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
 				" DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
@@ -1931,10 +1880,8 @@ static int iscsit_handle_nop_out(struct iscsit_conn *conn, struct iscsit_cmd *cm
 		}
 
 		if (conn->conn_ops->DataDigest) {
-			iscsit_do_crypto_hash_buf(conn->conn_rx_hash, ping_data,
-						  payload_length, padding,
-						  cmd->pad_bytes, &data_crc);
-
+			data_crc = iscsit_crc_buf(ping_data, payload_length,
+						  padding, cmd->pad_bytes);
 			if (checksum != data_crc) {
 				pr_err("Ping data CRC32C DataDigest"
 				" 0x%08x does not match computed 0x%08x\n",
@@ -2055,7 +2002,8 @@ iscsit_handle_task_mgt_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	__target_init_cmd(&cmd->se_cmd, &iscsi_ops,
 			  conn->sess->se_sess, 0, DMA_NONE,
 			  TCM_SIMPLE_TAG, cmd->sense_buffer + 2,
-			  scsilun_to_int(&hdr->lun));
+			  scsilun_to_int(&hdr->lun),
+			  conn->cmd_cnt);
 
 	target_get_sess_cmd(&cmd->se_cmd, true);
 
@@ -2333,10 +2281,7 @@ iscsit_handle_text_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 			goto reject;
 
 		if (conn->conn_ops->DataDigest) {
-			iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
-						  text_in, rx_size, 0, NULL,
-						  &data_crc);
-
+			data_crc = iscsit_crc_buf(text_in, rx_size, 0, NULL);
 			if (checksum != data_crc) {
 				pr_err("Text data CRC32C DataDigest"
 					" 0x%08x does not match computed"
@@ -2693,10 +2638,8 @@ static int iscsit_handle_immediate_data(
 	if (conn->conn_ops->DataDigest) {
 		u32 data_crc;
 
-		data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd,
-						    cmd->write_data_done, length, padding,
-						    cmd->pad_bytes);
-
+		data_crc = iscsit_crc_sglist(cmd, length, padding,
+					     cmd->pad_bytes);
 		if (checksum != data_crc) {
 			pr_err("ImmediateData CRC32C DataDigest 0x%08x"
 				" does not match computed 0x%08x\n", checksum,
@@ -3476,7 +3419,7 @@ iscsit_build_sendtargets_response(struct iscsit_cmd *cmd,
 					}
 				}
 
-				if (inet_addr_is_any((struct sockaddr *)&np->np_sockaddr))
+				if (inet_addr_is_any(&np->np_sockaddr))
 					sockaddr = &conn->local_sockaddr;
 				else
 					sockaddr = &np->np_sockaddr;
@@ -4121,10 +4064,8 @@ static void iscsit_get_rx_pdu(struct iscsit_conn *conn)
 				break;
 			}
 
-			iscsit_do_crypto_hash_buf(conn->conn_rx_hash, buffer,
-						  ISCSI_HDR_LEN, 0, NULL,
-						  &checksum);
-
+			checksum = iscsit_crc_buf(buffer, ISCSI_HDR_LEN, 0,
+						  NULL);
 			if (digest != checksum) {
 				pr_err("HeaderDigest CRC32C failed,"
 					" received 0x%08x, computed 0x%08x\n",
@@ -4218,9 +4159,12 @@ static void iscsit_release_commands_from_conn(struct iscsit_conn *conn)
 	list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) {
 		struct se_cmd *se_cmd = &cmd->se_cmd;
 
-		if (se_cmd->se_tfo != NULL) {
-			spin_lock_irq(&se_cmd->t_state_lock);
-			if (se_cmd->transport_state & CMD_T_ABORTED) {
+		if (!se_cmd->se_tfo)
+			continue;
+
+		spin_lock_irq(&se_cmd->t_state_lock);
+		if (se_cmd->transport_state & CMD_T_ABORTED) {
+			if (!(se_cmd->transport_state & CMD_T_TAS))
 				/*
 				 * LIO's abort path owns the cleanup for this,
 				 * so put it back on the list and let
@@ -4228,11 +4172,20 @@ static void iscsit_release_commands_from_conn(struct iscsit_conn *conn)
 				 */
 				list_move_tail(&cmd->i_conn_node,
 					       &conn->conn_cmd_list);
-			} else {
-				se_cmd->transport_state |= CMD_T_FABRIC_STOP;
-			}
+		} else {
+			se_cmd->transport_state |= CMD_T_FABRIC_STOP;
+		}
+
+		if (cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) {
+			/*
+			 * We never submitted the cmd to LIO core, so we have
+			 * to tell LIO to perform the completion process.
+			 */
 			spin_unlock_irq(&se_cmd->t_state_lock);
+			target_complete_cmd(&cmd->se_cmd, SAM_STAT_TASK_ABORTED);
+			continue;
 		}
+		spin_unlock_irq(&se_cmd->t_state_lock);
 	}
 	spin_unlock_bh(&conn->cmd_lock);
 
@@ -4243,6 +4196,16 @@ static void iscsit_release_commands_from_conn(struct iscsit_conn *conn)
 		iscsit_free_cmd(cmd, true);
 
 	}
+
+	/*
+	 * Wait on commands that were cleaned up via the aborted_task path.
+	 * LLDs that implement iscsit_wait_conn will already have waited for
+	 * commands.
+	 */
+	if (!conn->conn_transport->iscsit_wait_conn) {
+		target_stop_cmd_counter(conn->cmd_cnt);
+		target_wait_for_cmds(conn->cmd_cnt);
+	}
 }
 
 static void iscsit_stop_timers_for_cmds(
@@ -4300,8 +4263,8 @@ int iscsit_close_connection(
 	spin_unlock(&iscsit_global->ts_bitmap_lock);
 
 	iscsit_stop_timers_for_cmds(conn);
-	iscsit_stop_nopin_response_timer(conn);
 	iscsit_stop_nopin_timer(conn);
+	iscsit_stop_nopin_response_timer(conn);
 
 	if (conn->conn_transport->iscsit_wait_conn)
 		conn->conn_transport->iscsit_wait_conn(conn);
@@ -4389,15 +4352,6 @@ int iscsit_close_connection(
 	 */
 	iscsit_check_conn_usage_count(conn);
 
-	ahash_request_free(conn->conn_tx_hash);
-	if (conn->conn_rx_hash) {
-		struct crypto_ahash *tfm;
-
-		tfm = crypto_ahash_reqtfm(conn->conn_rx_hash);
-		ahash_request_free(conn->conn_rx_hash);
-		crypto_free_ahash(tfm);
-	}
-
 	if (conn->sock)
 		sock_release(conn->sock);
 
@@ -4517,6 +4471,9 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep)
 	iscsit_stop_time2retain_timer(sess);
 	spin_unlock_bh(&se_tpg->session_lock);
 
+	if (sess->sess_ops->ErrorRecoveryLevel == 2)
+		iscsit_free_connection_recovery_entries(sess);
+
 	/*
 	 * transport_deregister_session_configfs() will clear the
 	 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
@@ -4540,9 +4497,6 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep)
 
 	transport_deregister_session(sess->se_sess);
 
-	if (sess->sess_ops->ErrorRecoveryLevel == 2)
-		iscsit_free_connection_recovery_entries(sess);
-
 	iscsit_free_all_ooo_cmdsns(sess);
 
 	spin_lock_bh(&se_tpg->session_lock);
@@ -4710,21 +4664,6 @@ int iscsit_logout_post_handler(
 }
 EXPORT_SYMBOL(iscsit_logout_post_handler);
 
-void iscsit_fail_session(struct iscsit_session *sess)
-{
-	struct iscsit_conn *conn;
-
-	spin_lock_bh(&sess->conn_lock);
-	list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
-		pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
-		conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT;
-	}
-	spin_unlock_bh(&sess->conn_lock);
-
-	pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
-	sess->session_state = TARG_SESS_STATE_FAILED;
-}
-
 void iscsit_stop_session(
 	struct iscsit_session *sess,
 	int session_sleep,