target/iscsi: Fix np_ip bracket issue by removing np_ip

[ Upstream commit 76c28f1fcfeb42b47f798fe498351ee1d60086ae ]

Revert commit 1997e6259, which causes double brackets on ipv6
inaddr_any addresses.

Since we have np_sockaddr, if we need a textual representation we can
use "%pISc".

Change iscsit_add_network_portal() and iscsit_add_np() signatures to remove
*ip_str parameter.

Fix and extend some comments earlier in the function.

Tested to work for :: and ::1 via iscsiadm, previously :: failed, see
https://bugzilla.redhat.com/show_bug.cgi?id=1249107 .

CC: stable@vger.kernel.org
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

7 files changed, 940 insertions, 33 deletions

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 06ea1a113e45..062633295bc2 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -343,7 +343,6 @@ static struct iscsi_np *iscsit_get_np(
 
 struct iscsi_np *iscsit_add_np(
 	struct __kernel_sockaddr_storage *sockaddr,
-	char *ip_str,
 	int network_transport)
 {
 	struct sockaddr_in *sock_in;
@@ -372,11 +371,9 @@ struct iscsi_np *iscsit_add_np(
 	np->np_flags |= NPF_IP_NETWORK;
 	if (sockaddr->ss_family == AF_INET6) {
 		sock_in6 = (struct sockaddr_in6 *)sockaddr;
-		snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str);
 		np->np_port = ntohs(sock_in6->sin6_port);
 	} else {
 		sock_in = (struct sockaddr_in *)sockaddr;
-		sprintf(np->np_ip, "%s", ip_str);
 		np->np_port = ntohs(sock_in->sin_port);
 	}
 
@@ -413,8 +410,8 @@ struct iscsi_np *iscsit_add_np(
 	list_add_tail(&np->np_list, &g_np_list);
 	mutex_unlock(&np_lock);
 
-	pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
-		np->np_ip, np->np_port, np->np_transport->name);
+	pr_debug("CORE[0] - Added Network Portal: %pISc:%hu on %s\n",
+		&np->np_sockaddr, np->np_port, np->np_transport->name);
 
 	return np;
 }
@@ -483,8 +480,8 @@ int iscsit_del_np(struct iscsi_np *np)
 	list_del(&np->np_list);
 	mutex_unlock(&np_lock);
 
-	pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
-		np->np_ip, np->np_port, np->np_transport->name);
+	pr_debug("CORE[0] - Removed Network Portal: %pISc:%hu on %s\n",
+		&np->np_sockaddr, np->np_port, np->np_transport->name);
 
 	iscsit_put_transport(np->np_transport);
 	kfree(np);
@@ -3482,11 +3479,18 @@ iscsit_build_sendtargets_response(struct iscsi_cmd *cmd,
 					target_name_printed = 1;
 				}
 
-				len = sprintf(buf, "TargetAddress="
-					"%s:%hu,%hu",
-					inaddr_any ? conn->local_ip : np->np_ip,
-					np->np_port,
-					tpg->tpgt);
+				if (inaddr_any) {
+					len = sprintf(buf, "TargetAddress="
+						      "%s:%hu,%hu",
+						      conn->local_ip,
+						      np->np_port,
+						      tpg->tpgt);
+				} else {
+					len = sprintf(buf, "TargetAddress="
+						      "%pISpc,%hu",
+						      &np->np_sockaddr,
+						      tpg->tpgt);
+				}
 				len += 1;
 
 				if ((len + payload_len) > buffer_len) {
diff --git a/drivers/target/iscsi/iscsi_target.h b/drivers/target/iscsi/iscsi_target.h
index e936d56fb523..3ef6ef582b10 100644
--- a/drivers/target/iscsi/iscsi_target.h
+++ b/drivers/target/iscsi/iscsi_target.h
@@ -13,7 +13,7 @@ extern int iscsit_deaccess_np(struct iscsi_np *, struct iscsi_portal_group *,
 extern bool iscsit_check_np_match(struct __kernel_sockaddr_storage *,
 				struct iscsi_np *, int);
 extern struct iscsi_np *iscsit_add_np(struct __kernel_sockaddr_storage *,
-				char *, int);
+				int);
 extern int iscsit_reset_np_thread(struct iscsi_np *, struct iscsi_tpg_np *,
 				struct iscsi_portal_group *, bool);
 extern int iscsit_del_np(struct iscsi_np *);
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 9059c1e0b26e..49b34655e57a 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -103,7 +103,7 @@ static ssize_t lio_target_np_store_sctp(
 		 * Use existing np->np_sockaddr for SCTP network portal reference
 		 */
 		tpg_np_sctp = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr,
-					np->np_ip, tpg_np, ISCSI_SCTP_TCP);
+					tpg_np, ISCSI_SCTP_TCP);
 		if (!tpg_np_sctp || IS_ERR(tpg_np_sctp))
 			goto out;
 	} else {
@@ -181,7 +181,7 @@ static ssize_t lio_target_np_store_iser(
 		}
 
 		tpg_np_iser = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr,
-				np->np_ip, tpg_np, ISCSI_INFINIBAND);
+				tpg_np, ISCSI_INFINIBAND);
 		if (IS_ERR(tpg_np_iser)) {
 			rc = PTR_ERR(tpg_np_iser);
 			goto out;
@@ -252,8 +252,8 @@ static struct se_tpg_np *lio_target_call_addnptotpg(
 			return ERR_PTR(-EINVAL);
 		}
 		str++; /* Skip over leading "[" */
-		*str2 = '\0'; /* Terminate the IPv6 address */
-		str2++; /* Skip over the "]" */
+		*str2 = '\0'; /* Terminate the unbracketed IPv6 address */
+		str2++; /* Skip over the \0 */
 		port_str = strstr(str2, ":");
 		if (!port_str) {
 			pr_err("Unable to locate \":port\""
@@ -320,7 +320,7 @@ static struct se_tpg_np *lio_target_call_addnptotpg(
 	 * sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
 	 *
 	 */
-	tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, str, NULL,
+	tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, NULL,
 				ISCSI_TCP);
 	if (IS_ERR(tpg_np)) {
 		iscsit_put_tpg(tpg);
@@ -348,8 +348,8 @@ static void lio_target_call_delnpfromtpg(
 
 	se_tpg = &tpg->tpg_se_tpg;
 	pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
-		" PORTAL: %s:%hu\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
-		tpg->tpgt, tpg_np->tpg_np->np_ip, tpg_np->tpg_np->np_port);
+		" PORTAL: %pISc:%hu\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
+		tpg->tpgt, &tpg_np->tpg_np->np_sockaddr, tpg_np->tpg_np->np_port);
 
 	ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
 	if (ret < 0)
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 719ec300cd24..eb320e6eb93d 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -879,8 +879,8 @@ static void iscsi_handle_login_thread_timeout(unsigned long data)
 	struct iscsi_np *np = (struct iscsi_np *) data;
 
 	spin_lock_bh(&np->np_thread_lock);
-	pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
-			np->np_ip, np->np_port);
+	pr_err("iSCSI Login timeout on Network Portal %pISc:%hu\n",
+			&np->np_sockaddr, np->np_port);
 
 	if (np->np_login_timer_flags & ISCSI_TF_STOP) {
 		spin_unlock_bh(&np->np_thread_lock);
@@ -1357,8 +1357,8 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
 	spin_lock_bh(&np->np_thread_lock);
 	if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
 		spin_unlock_bh(&np->np_thread_lock);
-		pr_err("iSCSI Network Portal on %s:%hu currently not"
-			" active.\n", np->np_ip, np->np_port);
+		pr_err("iSCSI Network Portal on %pISc:%hu currently not"
+			" active.\n", &np->np_sockaddr, np->np_port);
 		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
 				ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
 		goto new_sess_out;
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index c3cb5c15efda..5530321c44f2 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -464,7 +464,6 @@ static bool iscsit_tpg_check_network_portal(
 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 	struct iscsi_portal_group *tpg,
 	struct __kernel_sockaddr_storage *sockaddr,
-	char *ip_str,
 	struct iscsi_tpg_np *tpg_np_parent,
 	int network_transport)
 {
@@ -474,8 +473,8 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 	if (!tpg_np_parent) {
 		if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 				network_transport)) {
-			pr_err("Network Portal: %s already exists on a"
-				" different TPG on %s\n", ip_str,
+			pr_err("Network Portal: %pISc already exists on a"
+				" different TPG on %s\n", sockaddr,
 				tpg->tpg_tiqn->tiqn);
 			return ERR_PTR(-EEXIST);
 		}
@@ -488,7 +487,7 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 		return ERR_PTR(-ENOMEM);
 	}
 
-	np = iscsit_add_np(sockaddr, ip_str, network_transport);
+	np = iscsit_add_np(sockaddr, network_transport);
 	if (IS_ERR(np)) {
 		kfree(tpg_np);
 		return ERR_CAST(np);
@@ -519,8 +518,8 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 		spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 	}
 
-	pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
-		tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
+	pr_debug("CORE[%s] - Added Network Portal: %pISc:%hu,%hu on %s\n",
+		tpg->tpg_tiqn->tiqn, &np->np_sockaddr, np->np_port, tpg->tpgt,
 		np->np_transport->name);
 
 	return tpg_np;
@@ -533,8 +532,8 @@ static int iscsit_tpg_release_np(
 {
 	iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 
-	pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
-		tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
+	pr_debug("CORE[%s] - Removed Network Portal: %pISc:%hu,%hu on %s\n",
+		tpg->tpg_tiqn->tiqn, &np->np_sockaddr, np->np_port, tpg->tpgt,
 		np->np_transport->name);
 
 	tpg_np->tpg_np = NULL;
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index e7265337bc43..e216128b5a98 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -22,7 +22,7 @@ extern struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(struct iscsi_session
 extern void iscsit_tpg_del_external_nps(struct iscsi_tpg_np *);
 extern struct iscsi_tpg_np *iscsit_tpg_locate_child_np(struct iscsi_tpg_np *, int);
 extern struct iscsi_tpg_np *iscsit_tpg_add_network_portal(struct iscsi_portal_group *,
-			struct __kernel_sockaddr_storage *, char *, struct iscsi_tpg_np *,
+			struct __kernel_sockaddr_storage *, struct iscsi_tpg_np *,
 			int);
 extern int iscsit_tpg_del_network_portal(struct iscsi_portal_group *,
 			struct iscsi_tpg_np *);
diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
new file mode 100644
index 000000000000..7bd03f867fca
--- /dev/null
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -0,0 +1,904 @@
+#ifndef ISCSI_TARGET_CORE_H
+#define ISCSI_TARGET_CORE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/iscsi_proto.h>
+#include <target/target_core_base.h>
+
+#define ISCSIT_VERSION			"v4.1.0"
+#define ISCSI_MAX_DATASN_MISSING_COUNT	16
+#define ISCSI_TX_THREAD_TCP_TIMEOUT	2
+#define ISCSI_RX_THREAD_TCP_TIMEOUT	2
+#define SECONDS_FOR_ASYNC_LOGOUT	10
+#define SECONDS_FOR_ASYNC_TEXT		10
+#define SECONDS_FOR_LOGOUT_COMP		15
+#define WHITE_SPACE			" \t\v\f\n\r"
+#define ISCSIT_MIN_TAGS			16
+#define ISCSIT_EXTRA_TAGS		8
+#define ISCSIT_TCP_BACKLOG		256
+#define ISCSI_RX_THREAD_NAME		"iscsi_trx"
+#define ISCSI_TX_THREAD_NAME		"iscsi_ttx"
+
+/* struct iscsi_node_attrib sanity values */
+#define NA_DATAOUT_TIMEOUT		3
+#define NA_DATAOUT_TIMEOUT_MAX		60
+#define NA_DATAOUT_TIMEOUT_MIX		2
+#define NA_DATAOUT_TIMEOUT_RETRIES	5
+#define NA_DATAOUT_TIMEOUT_RETRIES_MAX	15
+#define NA_DATAOUT_TIMEOUT_RETRIES_MIN	1
+#define NA_NOPIN_TIMEOUT		15
+#define NA_NOPIN_TIMEOUT_MAX		60
+#define NA_NOPIN_TIMEOUT_MIN		3
+#define NA_NOPIN_RESPONSE_TIMEOUT	30
+#define NA_NOPIN_RESPONSE_TIMEOUT_MAX	60
+#define NA_NOPIN_RESPONSE_TIMEOUT_MIN	3
+#define NA_RANDOM_DATAIN_PDU_OFFSETS	0
+#define NA_RANDOM_DATAIN_SEQ_OFFSETS	0
+#define NA_RANDOM_R2T_OFFSETS		0
+
+/* struct iscsi_tpg_attrib sanity values */
+#define TA_AUTHENTICATION		1
+#define TA_LOGIN_TIMEOUT		15
+#define TA_LOGIN_TIMEOUT_MAX		30
+#define TA_LOGIN_TIMEOUT_MIN		5
+#define TA_NETIF_TIMEOUT		2
+#define TA_NETIF_TIMEOUT_MAX		15
+#define TA_NETIF_TIMEOUT_MIN		2
+#define TA_GENERATE_NODE_ACLS		0
+#define TA_DEFAULT_CMDSN_DEPTH		64
+#define TA_DEFAULT_CMDSN_DEPTH_MAX	512
+#define TA_DEFAULT_CMDSN_DEPTH_MIN	1
+#define TA_CACHE_DYNAMIC_ACLS		0
+/* Enabled by default in demo mode (generic_node_acls=1) */
+#define TA_DEMO_MODE_WRITE_PROTECT	1
+/* Disabled by default in production mode w/ explict ACLs */
+#define TA_PROD_MODE_WRITE_PROTECT	0
+#define TA_DEMO_MODE_DISCOVERY		1
+#define TA_DEFAULT_ERL			0
+#define TA_CACHE_CORE_NPS		0
+/* T10 protection information disabled by default */
+#define TA_DEFAULT_T10_PI		0
+#define TA_DEFAULT_FABRIC_PROT_TYPE	0
+
+#define ISCSI_IOV_DATA_BUFFER		5
+
+enum iscsit_transport_type {
+	ISCSI_TCP				= 0,
+	ISCSI_SCTP_TCP				= 1,
+	ISCSI_SCTP_UDP				= 2,
+	ISCSI_IWARP_TCP				= 3,
+	ISCSI_IWARP_SCTP			= 4,
+	ISCSI_INFINIBAND			= 5,
+};
+
+/* RFC-3720 7.1.4  Standard Connection State Diagram for a Target */
+enum target_conn_state_table {
+	TARG_CONN_STATE_FREE			= 0x1,
+	TARG_CONN_STATE_XPT_UP			= 0x3,
+	TARG_CONN_STATE_IN_LOGIN		= 0x4,
+	TARG_CONN_STATE_LOGGED_IN		= 0x5,
+	TARG_CONN_STATE_IN_LOGOUT		= 0x6,
+	TARG_CONN_STATE_LOGOUT_REQUESTED	= 0x7,
+	TARG_CONN_STATE_CLEANUP_WAIT		= 0x8,
+};
+
+/* RFC-3720 7.3.2  Session State Diagram for a Target */
+enum target_sess_state_table {
+	TARG_SESS_STATE_FREE			= 0x1,
+	TARG_SESS_STATE_ACTIVE			= 0x2,
+	TARG_SESS_STATE_LOGGED_IN		= 0x3,
+	TARG_SESS_STATE_FAILED			= 0x4,
+	TARG_SESS_STATE_IN_CONTINUE		= 0x5,
+};
+
+/* struct iscsi_data_count->type */
+enum data_count_type {
+	ISCSI_RX_DATA	= 1,
+	ISCSI_TX_DATA	= 2,
+};
+
+/* struct iscsi_datain_req->dr_complete */
+enum datain_req_comp_table {
+	DATAIN_COMPLETE_NORMAL			= 1,
+	DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2,
+	DATAIN_COMPLETE_CONNECTION_RECOVERY	= 3,
+};
+
+/* struct iscsi_datain_req->recovery */
+enum datain_req_rec_table {
+	DATAIN_WITHIN_COMMAND_RECOVERY		= 1,
+	DATAIN_CONNECTION_RECOVERY		= 2,
+};
+
+/* struct iscsi_portal_group->state */
+enum tpg_state_table {
+	TPG_STATE_FREE				= 0,
+	TPG_STATE_ACTIVE			= 1,
+	TPG_STATE_INACTIVE			= 2,
+	TPG_STATE_COLD_RESET			= 3,
+};
+
+/* struct iscsi_tiqn->tiqn_state */
+enum tiqn_state_table {
+	TIQN_STATE_ACTIVE			= 1,
+	TIQN_STATE_SHUTDOWN			= 2,
+};
+
+/* struct iscsi_cmd->cmd_flags */
+enum cmd_flags_table {
+	ICF_GOT_LAST_DATAOUT			= 0x00000001,
+	ICF_GOT_DATACK_SNACK			= 0x00000002,
+	ICF_NON_IMMEDIATE_UNSOLICITED_DATA	= 0x00000004,
+	ICF_SENT_LAST_R2T			= 0x00000008,
+	ICF_WITHIN_COMMAND_RECOVERY		= 0x00000010,
+	ICF_CONTIG_MEMORY			= 0x00000020,
+	ICF_ATTACHED_TO_RQUEUE			= 0x00000040,
+	ICF_OOO_CMDSN				= 0x00000080,
+	ICF_SENDTARGETS_ALL			= 0x00000100,
+	ICF_SENDTARGETS_SINGLE			= 0x00000200,
+};
+
+/* struct iscsi_cmd->i_state */
+enum cmd_i_state_table {
+	ISTATE_NO_STATE			= 0,
+	ISTATE_NEW_CMD			= 1,
+	ISTATE_DEFERRED_CMD		= 2,
+	ISTATE_UNSOLICITED_DATA		= 3,
+	ISTATE_RECEIVE_DATAOUT		= 4,
+	ISTATE_RECEIVE_DATAOUT_RECOVERY	= 5,
+	ISTATE_RECEIVED_LAST_DATAOUT	= 6,
+	ISTATE_WITHIN_DATAOUT_RECOVERY	= 7,
+	ISTATE_IN_CONNECTION_RECOVERY	= 8,
+	ISTATE_RECEIVED_TASKMGT		= 9,
+	ISTATE_SEND_ASYNCMSG		= 10,
+	ISTATE_SENT_ASYNCMSG		= 11,
+	ISTATE_SEND_DATAIN		= 12,
+	ISTATE_SEND_LAST_DATAIN		= 13,
+	ISTATE_SENT_LAST_DATAIN		= 14,
+	ISTATE_SEND_LOGOUTRSP		= 15,
+	ISTATE_SENT_LOGOUTRSP		= 16,
+	ISTATE_SEND_NOPIN		= 17,
+	ISTATE_SENT_NOPIN		= 18,
+	ISTATE_SEND_REJECT		= 19,
+	ISTATE_SENT_REJECT		= 20,
+	ISTATE_SEND_R2T			= 21,
+	ISTATE_SENT_R2T			= 22,
+	ISTATE_SEND_R2T_RECOVERY	= 23,
+	ISTATE_SENT_R2T_RECOVERY	= 24,
+	ISTATE_SEND_LAST_R2T		= 25,
+	ISTATE_SENT_LAST_R2T		= 26,
+	ISTATE_SEND_LAST_R2T_RECOVERY	= 27,
+	ISTATE_SENT_LAST_R2T_RECOVERY	= 28,
+	ISTATE_SEND_STATUS		= 29,
+	ISTATE_SEND_STATUS_BROKEN_PC	= 30,
+	ISTATE_SENT_STATUS		= 31,
+	ISTATE_SEND_STATUS_RECOVERY	= 32,
+	ISTATE_SENT_STATUS_RECOVERY	= 33,
+	ISTATE_SEND_TASKMGTRSP		= 34,
+	ISTATE_SENT_TASKMGTRSP		= 35,
+	ISTATE_SEND_TEXTRSP		= 36,
+	ISTATE_SENT_TEXTRSP		= 37,
+	ISTATE_SEND_NOPIN_WANT_RESPONSE	= 38,
+	ISTATE_SENT_NOPIN_WANT_RESPONSE	= 39,
+	ISTATE_SEND_NOPIN_NO_RESPONSE	= 40,
+	ISTATE_REMOVE			= 41,
+	ISTATE_FREE			= 42,
+};
+
+/* Used for iscsi_recover_cmdsn() return values */
+enum recover_cmdsn_ret_table {
+	CMDSN_ERROR_CANNOT_RECOVER	= -1,
+	CMDSN_NORMAL_OPERATION		= 0,
+	CMDSN_LOWER_THAN_EXP		= 1,
+	CMDSN_HIGHER_THAN_EXP		= 2,
+	CMDSN_MAXCMDSN_OVERRUN		= 3,
+};
+
+/* Used for iscsi_handle_immediate_data() return values */
+enum immedate_data_ret_table {
+	IMMEDIATE_DATA_CANNOT_RECOVER	= -1,
+	IMMEDIATE_DATA_NORMAL_OPERATION = 0,
+	IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1,
+};
+
+/* Used for iscsi_decide_dataout_action() return values */
+enum dataout_action_ret_table {
+	DATAOUT_CANNOT_RECOVER		= -1,
+	DATAOUT_NORMAL			= 0,
+	DATAOUT_SEND_R2T		= 1,
+	DATAOUT_SEND_TO_TRANSPORT	= 2,
+	DATAOUT_WITHIN_COMMAND_RECOVERY = 3,
+};
+
+/* Used for struct iscsi_node_auth->naf_flags */
+enum naf_flags_table {
+	NAF_USERID_SET			= 0x01,
+	NAF_PASSWORD_SET		= 0x02,
+	NAF_USERID_IN_SET		= 0x04,
+	NAF_PASSWORD_IN_SET		= 0x08,
+};
+
+/* Used by various struct timer_list to manage iSCSI specific state */
+enum iscsi_timer_flags_table {
+	ISCSI_TF_RUNNING		= 0x01,
+	ISCSI_TF_STOP			= 0x02,
+	ISCSI_TF_EXPIRED		= 0x04,
+};
+
+/* Used for struct iscsi_np->np_flags */
+enum np_flags_table {
+	NPF_IP_NETWORK		= 0x00,
+};
+
+/* Used for struct iscsi_np->np_thread_state */
+enum np_thread_state_table {
+	ISCSI_NP_THREAD_ACTIVE		= 1,
+	ISCSI_NP_THREAD_INACTIVE	= 2,
+	ISCSI_NP_THREAD_RESET		= 3,
+	ISCSI_NP_THREAD_SHUTDOWN	= 4,
+	ISCSI_NP_THREAD_EXIT		= 5,
+};
+
+struct iscsi_conn_ops {
+	u8	HeaderDigest;			/* [0,1] == [None,CRC32C] */
+	u8	DataDigest;			/* [0,1] == [None,CRC32C] */
+	u32	MaxRecvDataSegmentLength;	/* [512..2**24-1] */
+	u32	MaxXmitDataSegmentLength;	/* [512..2**24-1] */
+	u8	OFMarker;			/* [0,1] == [No,Yes] */
+	u8	IFMarker;			/* [0,1] == [No,Yes] */
+	u32	OFMarkInt;			/* [1..65535] */
+	u32	IFMarkInt;			/* [1..65535] */
+	/*
+	 * iSER specific connection parameters
+	 */
+	u32	InitiatorRecvDataSegmentLength;	/* [512..2**24-1] */
+	u32	TargetRecvDataSegmentLength;	/* [512..2**24-1] */
+};
+
+struct iscsi_sess_ops {
+	char	InitiatorName[224];
+	char	InitiatorAlias[256];
+	char	TargetName[224];
+	char	TargetAlias[256];
+	char	TargetAddress[256];
+	u16	TargetPortalGroupTag;		/* [0..65535] */
+	u16	MaxConnections;			/* [1..65535] */
+	u8	InitialR2T;			/* [0,1] == [No,Yes] */
+	u8	ImmediateData;			/* [0,1] == [No,Yes] */
+	u32	MaxBurstLength;			/* [512..2**24-1] */
+	u32	FirstBurstLength;		/* [512..2**24-1] */
+	u16	DefaultTime2Wait;		/* [0..3600] */
+	u16	DefaultTime2Retain;		/* [0..3600] */
+	u16	MaxOutstandingR2T;		/* [1..65535] */
+	u8	DataPDUInOrder;			/* [0,1] == [No,Yes] */
+	u8	DataSequenceInOrder;		/* [0,1] == [No,Yes] */
+	u8	ErrorRecoveryLevel;		/* [0..2] */
+	u8	SessionType;			/* [0,1] == [Normal,Discovery]*/
+	/*
+	 * iSER specific session parameters
+	 */
+	u8	RDMAExtensions;			/* [0,1] == [No,Yes] */
+};
+
+struct iscsi_queue_req {
+	int			state;
+	struct iscsi_cmd	*cmd;
+	struct list_head	qr_list;
+};
+
+struct iscsi_data_count {
+	int			data_length;
+	int			sync_and_steering;
+	enum data_count_type	type;
+	u32			iov_count;
+	u32			ss_iov_count;
+	u32			ss_marker_count;
+	struct kvec		*iov;
+};
+
+struct iscsi_param_list {
+	bool			iser;
+	struct list_head	param_list;
+	struct list_head	extra_response_list;
+};
+
+struct iscsi_datain_req {
+	enum datain_req_comp_table dr_complete;
+	int			generate_recovery_values;
+	enum datain_req_rec_table recovery;
+	u32			begrun;
+	u32			runlength;
+	u32			data_length;
+	u32			data_offset;
+	u32			data_sn;
+	u32			next_burst_len;
+	u32			read_data_done;
+	u32			seq_send_order;
+	struct list_head	cmd_datain_node;
+} ____cacheline_aligned;
+
+struct iscsi_ooo_cmdsn {
+	u16			cid;
+	u32			batch_count;
+	u32			cmdsn;
+	u32			exp_cmdsn;
+	struct iscsi_cmd	*cmd;
+	struct list_head	ooo_list;
+} ____cacheline_aligned;
+
+struct iscsi_datain {
+	u8			flags;
+	u32			data_sn;
+	u32			length;
+	u32			offset;
+} ____cacheline_aligned;
+
+struct iscsi_r2t {
+	int			seq_complete;
+	int			recovery_r2t;
+	int			sent_r2t;
+	u32			r2t_sn;
+	u32			offset;
+	u32			targ_xfer_tag;
+	u32			xfer_len;
+	struct list_head	r2t_list;
+} ____cacheline_aligned;
+
+struct iscsi_cmd {
+	enum iscsi_timer_flags_table dataout_timer_flags;
+	/* DataOUT timeout retries */
+	u8			dataout_timeout_retries;
+	/* Within command recovery count */
+	u8			error_recovery_count;
+	/* iSCSI dependent state for out or order CmdSNs */
+	enum cmd_i_state_table	deferred_i_state;
+	/* iSCSI dependent state */
+	enum cmd_i_state_table	i_state;
+	/* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
+	u8			immediate_cmd;
+	/* Immediate data present */
+	u8			immediate_data;
+	/* iSCSI Opcode */
+	u8			iscsi_opcode;
+	/* iSCSI Response Code */
+	u8			iscsi_response;
+	/* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
+	u8			logout_reason;
+	/* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
+	u8			logout_response;
+	/* MaxCmdSN has been incremented */
+	u8			maxcmdsn_inc;
+	/* Immediate Unsolicited Dataout */
+	u8			unsolicited_data;
+	/* Reject reason code */
+	u8			reject_reason;
+	/* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
+	u16			logout_cid;
+	/* Command flags */
+	enum cmd_flags_table	cmd_flags;
+	/* Initiator Task Tag assigned from Initiator */
+	itt_t			init_task_tag;
+	/* Target Transfer Tag assigned from Target */
+	u32			targ_xfer_tag;
+	/* CmdSN assigned from Initiator */
+	u32			cmd_sn;
+	/* ExpStatSN assigned from Initiator */
+	u32			exp_stat_sn;
+	/* StatSN assigned to this ITT */
+	u32			stat_sn;
+	/* DataSN Counter */
+	u32			data_sn;
+	/* R2TSN Counter */
+	u32			r2t_sn;
+	/* Last DataSN acknowledged via DataAck SNACK */
+	u32			acked_data_sn;
+	/* Used for echoing NOPOUT ping data */
+	u32			buf_ptr_size;
+	/* Used to store DataDigest */
+	u32			data_crc;
+	/* Counter for MaxOutstandingR2T */
+	u32			outstanding_r2ts;
+	/* Next R2T Offset when DataSequenceInOrder=Yes */
+	u32			r2t_offset;
+	/* Iovec current and orig count for iscsi_cmd->iov_data */
+	u32			iov_data_count;
+	u32			orig_iov_data_count;
+	/* Number of miscellaneous iovecs used for IP stack calls */
+	u32			iov_misc_count;
+	/* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */
+	u32			pdu_count;
+	/* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */
+	u32			pdu_send_order;
+	/* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */
+	u32			pdu_start;
+	/* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */
+	u32			seq_send_order;
+	/* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */
+	u32			seq_count;
+	/* Current struct iscsi_seq in struct iscsi_cmd->seq_list */
+	u32			seq_no;
+	/* Lowest offset in current DataOUT sequence */
+	u32			seq_start_offset;
+	/* Highest offset in current DataOUT sequence */
+	u32			seq_end_offset;
+	/* Total size in bytes received so far of READ data */
+	u32			read_data_done;
+	/* Total size in bytes received so far of WRITE data */
+	u32			write_data_done;
+	/* Counter for FirstBurstLength key */
+	u32			first_burst_len;
+	/* Counter for MaxBurstLength key */
+	u32			next_burst_len;
+	/* Transfer size used for IP stack calls */
+	u32			tx_size;
+	/* Buffer used for various purposes */
+	void			*buf_ptr;
+	/* Used by SendTargets=[iqn.,eui.] discovery */
+	void			*text_in_ptr;
+	/* See include/linux/dma-mapping.h */
+	enum dma_data_direction	data_direction;
+	/* iSCSI PDU Header + CRC */
+	unsigned char		pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
+	/* Number of times struct iscsi_cmd is present in immediate queue */
+	atomic_t		immed_queue_count;
+	atomic_t		response_queue_count;
+	spinlock_t		datain_lock;
+	spinlock_t		dataout_timeout_lock;
+	/* spinlock for protecting struct iscsi_cmd->i_state */
+	spinlock_t		istate_lock;
+	/* spinlock for adding within command recovery entries */
+	spinlock_t		error_lock;
+	/* spinlock for adding R2Ts */
+	spinlock_t		r2t_lock;
+	/* DataIN List */
+	struct list_head	datain_list;
+	/* R2T List */
+	struct list_head	cmd_r2t_list;
+	/* Timer for DataOUT */
+	struct timer_list	dataout_timer;
+	/* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
+	struct kvec		*iov_data;
+	/* Iovecs for miscellaneous purposes */
+#define ISCSI_MISC_IOVECS			5
+	struct kvec		iov_misc[ISCSI_MISC_IOVECS];
+	/* Array of struct iscsi_pdu used for DataPDUInOrder=No */
+	struct iscsi_pdu	*pdu_list;
+	/* Current struct iscsi_pdu used for DataPDUInOrder=No */
+	struct iscsi_pdu	*pdu_ptr;
+	/* Array of struct iscsi_seq used for DataSequenceInOrder=No */
+	struct iscsi_seq	*seq_list;
+	/* Current struct iscsi_seq used for DataSequenceInOrder=No */
+	struct iscsi_seq	*seq_ptr;
+	/* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
+	struct iscsi_tmr_req	*tmr_req;
+	/* Connection this command is alligient to */
+	struct iscsi_conn	*conn;
+	/* Pointer to connection recovery entry */
+	struct iscsi_conn_recovery *cr;
+	/* Session the command is part of,  used for connection recovery */
+	struct iscsi_session	*sess;
+	/* list_head for connection list */
+	struct list_head	i_conn_node;
+	/* The TCM I/O descriptor that is accessed via container_of() */
+	struct se_cmd		se_cmd;
+	/* Sense buffer that will be mapped into outgoing status */
+#define ISCSI_SENSE_BUFFER_LEN          (TRANSPORT_SENSE_BUFFER + 2)
+	unsigned char		sense_buffer[ISCSI_SENSE_BUFFER_LEN];
+
+	u32			padding;
+	u8			pad_bytes[4];
+
+	struct scatterlist	*first_data_sg;
+	u32			first_data_sg_off;
+	u32			kmapped_nents;
+	sense_reason_t		sense_reason;
+}  ____cacheline_aligned;
+
+struct iscsi_tmr_req {
+	bool			task_reassign:1;
+	u32			exp_data_sn;
+	struct iscsi_cmd	*ref_cmd;
+	struct iscsi_conn_recovery *conn_recovery;
+	struct se_tmr_req	*se_tmr_req;
+};
+
+struct iscsi_conn {
+	wait_queue_head_t	queues_wq;
+	/* Authentication Successful for this connection */
+	u8			auth_complete;
+	/* State connection is currently in */
+	u8			conn_state;
+	u8			conn_logout_reason;
+	u8			network_transport;
+	enum iscsi_timer_flags_table nopin_timer_flags;
+	enum iscsi_timer_flags_table nopin_response_timer_flags;
+	/* Used to know what thread encountered a transport failure */
+	u8			which_thread;
+	/* connection id assigned by the Initiator */
+	u16			cid;
+	/* Remote TCP Port */
+	u16			login_port;
+	u16			local_port;
+	int			net_size;
+	int			login_family;
+	u32			auth_id;
+	u32			conn_flags;
+	/* Used for iscsi_tx_login_rsp() */
+	itt_t			login_itt;
+	u32			exp_statsn;
+	/* Per connection status sequence number */
+	u32			stat_sn;
+	/* IFMarkInt's Current Value */
+	u32			if_marker;
+	/* OFMarkInt's Current Value */
+	u32			of_marker;
+	/* Used for calculating OFMarker offset to next PDU */
+	u32			of_marker_offset;
+#define IPV6_ADDRESS_SPACE				48
+	unsigned char		login_ip[IPV6_ADDRESS_SPACE];
+	unsigned char		local_ip[IPV6_ADDRESS_SPACE];
+	int			conn_usage_count;
+	int			conn_waiting_on_uc;
+	atomic_t		check_immediate_queue;
+	atomic_t		conn_logout_remove;
+	atomic_t		connection_exit;
+	atomic_t		connection_recovery;
+	atomic_t		connection_reinstatement;
+	atomic_t		connection_wait_rcfr;
+	atomic_t		sleep_on_conn_wait_comp;
+	atomic_t		transport_failed;
+	struct completion	conn_post_wait_comp;
+	struct completion	conn_wait_comp;
+	struct completion	conn_wait_rcfr_comp;
+	struct completion	conn_waiting_on_uc_comp;
+	struct completion	conn_logout_comp;
+	struct completion	tx_half_close_comp;
+	struct completion	rx_half_close_comp;
+	/* socket used by this connection */
+	struct socket		*sock;
+	void			(*orig_data_ready)(struct sock *);
+	void			(*orig_state_change)(struct sock *);
+#define LOGIN_FLAGS_READ_ACTIVE		1
+#define LOGIN_FLAGS_CLOSED		2
+#define LOGIN_FLAGS_READY		4
+	unsigned long		login_flags;
+	struct delayed_work	login_work;
+	struct delayed_work	login_cleanup_work;
+	struct iscsi_login	*login;
+	struct timer_list	nopin_timer;
+	struct timer_list	nopin_response_timer;
+	struct timer_list	transport_timer;
+	struct task_struct	*login_kworker;
+	/* Spinlock used for add/deleting cmd's from conn_cmd_list */
+	spinlock_t		cmd_lock;
+	spinlock_t		conn_usage_lock;
+	spinlock_t		immed_queue_lock;
+	spinlock_t		nopin_timer_lock;
+	spinlock_t		response_queue_lock;
+	spinlock_t		state_lock;
+	/* libcrypto RX and TX contexts for crc32c */
+	struct hash_desc	conn_rx_hash;
+	struct hash_desc	conn_tx_hash;
+	/* Used for scheduling TX and RX connection kthreads */
+	cpumask_var_t		conn_cpumask;
+	unsigned int		conn_rx_reset_cpumask:1;
+	unsigned int		conn_tx_reset_cpumask:1;
+	/* list_head of struct iscsi_cmd for this connection */
+	struct list_head	conn_cmd_list;
+	struct list_head	immed_queue_list;
+	struct list_head	response_queue_list;
+	struct iscsi_conn_ops	*conn_ops;
+	struct iscsi_login	*conn_login;
+	struct iscsit_transport *conn_transport;
+	struct iscsi_param_list	*param_list;
+	/* Used for per connection auth state machine */
+	void			*auth_protocol;
+	void			*context;
+	struct iscsi_login_thread_s *login_thread;
+	struct iscsi_portal_group *tpg;
+	struct iscsi_tpg_np	*tpg_np;
+	/* Pointer to parent session */
+	struct iscsi_session	*sess;
+	int			bitmap_id;
+	int			rx_thread_active;
+	struct task_struct	*rx_thread;
+	struct completion	rx_login_comp;
+	int			tx_thread_active;
+	struct task_struct	*tx_thread;
+	/* list_head for session connection list */
+	struct list_head	conn_list;
+} ____cacheline_aligned;
+
+struct iscsi_conn_recovery {
+	u16			cid;
+	u32			cmd_count;
+	u32			maxrecvdatasegmentlength;
+	u32			maxxmitdatasegmentlength;
+	int			ready_for_reallegiance;
+	struct list_head	conn_recovery_cmd_list;
+	spinlock_t		conn_recovery_cmd_lock;
+	struct timer_list	time2retain_timer;
+	struct iscsi_session	*sess;
+	struct list_head	cr_list;
+}  ____cacheline_aligned;
+
+struct iscsi_session {
+	u8			initiator_vendor;
+	u8			isid[6];
+	enum iscsi_timer_flags_table time2retain_timer_flags;
+	u8			version_active;
+	u16			cid_called;
+	u16			conn_recovery_count;
+	u16			tsih;
+	/* state session is currently in */
+	u32			session_state;
+	/* session wide counter: initiator assigned task tag */
+	itt_t			init_task_tag;
+	/* session wide counter: target assigned task tag */
+	u32			targ_xfer_tag;
+	u32			cmdsn_window;
+
+	/* protects cmdsn values */
+	struct mutex		cmdsn_mutex;
+	/* session wide counter: expected command sequence number */
+	u32			exp_cmd_sn;
+	/* session wide counter: maximum allowed command sequence number */
+	u32			max_cmd_sn;
+	struct list_head	sess_ooo_cmdsn_list;
+
+	/* LIO specific session ID */
+	u32			sid;
+	char			auth_type[8];
+	/* unique within the target */
+	int			session_index;
+	/* Used for session reference counting */
+	int			session_usage_count;
+	int			session_waiting_on_uc;
+	atomic_long_t		cmd_pdus;
+	atomic_long_t		rsp_pdus;
+	atomic_long_t		tx_data_octets;
+	atomic_long_t		rx_data_octets;
+	atomic_long_t		conn_digest_errors;
+	atomic_long_t		conn_timeout_errors;
+	u64			creation_time;
+	/* Number of active connections */
+	atomic_t		nconn;
+	atomic_t		session_continuation;
+	atomic_t		session_fall_back_to_erl0;
+	atomic_t		session_logout;
+	atomic_t		session_reinstatement;
+	atomic_t		session_stop_active;
+	atomic_t		sleep_on_sess_wait_comp;
+	/* connection list */
+	struct list_head	sess_conn_list;
+	struct list_head	cr_active_list;
+	struct list_head	cr_inactive_list;
+	spinlock_t		conn_lock;
+	spinlock_t		cr_a_lock;
+	spinlock_t		cr_i_lock;
+	spinlock_t		session_usage_lock;
+	spinlock_t		ttt_lock;
+	struct completion	async_msg_comp;
+	struct completion	reinstatement_comp;
+	struct completion	session_wait_comp;
+	struct completion	session_waiting_on_uc_comp;
+	struct timer_list	time2retain_timer;
+	struct iscsi_sess_ops	*sess_ops;
+	struct se_session	*se_sess;
+	struct iscsi_portal_group *tpg;
+} ____cacheline_aligned;
+
+struct iscsi_login {
+	u8 auth_complete;
+	u8 checked_for_existing;
+	u8 current_stage;
+	u8 leading_connection;
+	u8 first_request;
+	u8 version_min;
+	u8 version_max;
+	u8 login_complete;
+	u8 login_failed;
+	bool zero_tsih;
+	char isid[6];
+	u32 cmd_sn;
+	itt_t init_task_tag;
+	u32 initial_exp_statsn;
+	u32 rsp_length;
+	u16 cid;
+	u16 tsih;
+	char req[ISCSI_HDR_LEN];
+	char rsp[ISCSI_HDR_LEN];
+	char *req_buf;
+	char *rsp_buf;
+	struct iscsi_conn *conn;
+	struct iscsi_np *np;
+} ____cacheline_aligned;
+
+struct iscsi_node_attrib {
+	u32			dataout_timeout;
+	u32			dataout_timeout_retries;
+	u32			default_erl;
+	u32			nopin_timeout;
+	u32			nopin_response_timeout;
+	u32			random_datain_pdu_offsets;
+	u32			random_datain_seq_offsets;
+	u32			random_r2t_offsets;
+	u32			tmr_cold_reset;
+	u32			tmr_warm_reset;
+	struct iscsi_node_acl *nacl;
+};
+
+struct se_dev_entry_s;
+
+struct iscsi_node_auth {
+	enum naf_flags_table	naf_flags;
+	int			authenticate_target;
+	/* Used for iscsit_global->discovery_auth,
+	 * set to zero (auth disabled) by default */
+	int			enforce_discovery_auth;
+#define MAX_USER_LEN				256
+#define MAX_PASS_LEN				256
+	char			userid[MAX_USER_LEN];
+	char			password[MAX_PASS_LEN];
+	char			userid_mutual[MAX_USER_LEN];
+	char			password_mutual[MAX_PASS_LEN];
+};
+
+#include "iscsi_target_stat.h"
+
+struct iscsi_node_stat_grps {
+	struct config_group	iscsi_sess_stats_group;
+	struct config_group	iscsi_conn_stats_group;
+};
+
+struct iscsi_node_acl {
+	struct iscsi_node_attrib node_attrib;
+	struct iscsi_node_auth	node_auth;
+	struct iscsi_node_stat_grps node_stat_grps;
+	struct se_node_acl	se_node_acl;
+};
+
+struct iscsi_tpg_attrib {
+	u32			authentication;
+	u32			login_timeout;
+	u32			netif_timeout;
+	u32			generate_node_acls;
+	u32			cache_dynamic_acls;
+	u32			default_cmdsn_depth;
+	u32			demo_mode_write_protect;
+	u32			prod_mode_write_protect;
+	u32			demo_mode_discovery;
+	u32			default_erl;
+	u8			t10_pi;
+	u32			fabric_prot_type;
+	struct iscsi_portal_group *tpg;
+};
+
+struct iscsi_np {
+	int			np_network_transport;
+	int			np_ip_proto;
+	int			np_sock_type;
+	enum np_thread_state_table np_thread_state;
+	bool                    enabled;
+	enum iscsi_timer_flags_table np_login_timer_flags;
+	u32			np_exports;
+	enum np_flags_table	np_flags;
+	u16			np_port;
+	spinlock_t		np_thread_lock;
+	struct completion	np_restart_comp;
+	struct socket		*np_socket;
+	struct __kernel_sockaddr_storage np_sockaddr;
+	struct task_struct	*np_thread;
+	struct timer_list	np_login_timer;
+	void			*np_context;
+	struct iscsit_transport *np_transport;
+	struct list_head	np_list;
+} ____cacheline_aligned;
+
+struct iscsi_tpg_np {
+	struct iscsi_np		*tpg_np;
+	struct iscsi_portal_group *tpg;
+	struct iscsi_tpg_np	*tpg_np_parent;
+	struct list_head	tpg_np_list;
+	struct list_head	tpg_np_child_list;
+	struct list_head	tpg_np_parent_list;
+	struct se_tpg_np	se_tpg_np;
+	spinlock_t		tpg_np_parent_lock;
+	struct completion	tpg_np_comp;
+	struct kref		tpg_np_kref;
+};
+
+struct iscsi_portal_group {
+	unsigned char		tpg_chap_id;
+	/* TPG State */
+	enum tpg_state_table	tpg_state;
+	/* Target Portal Group Tag */
+	u16			tpgt;
+	/* Id assigned to target sessions */
+	u16			ntsih;
+	/* Number of active sessions */
+	u32			nsessions;
+	/* Number of Network Portals available for this TPG */
+	u32			num_tpg_nps;
+	/* Per TPG LIO specific session ID. */
+	u32			sid;
+	/* Spinlock for adding/removing Network Portals */
+	spinlock_t		tpg_np_lock;
+	spinlock_t		tpg_state_lock;
+	struct se_portal_group tpg_se_tpg;
+	struct mutex		tpg_access_lock;
+	struct semaphore	np_login_sem;
+	struct iscsi_tpg_attrib	tpg_attrib;
+	struct iscsi_node_auth	tpg_demo_auth;
+	/* Pointer to default list of iSCSI parameters for TPG */
+	struct iscsi_param_list	*param_list;
+	struct iscsi_tiqn	*tpg_tiqn;
+	struct list_head	tpg_gnp_list;
+	struct list_head	tpg_list;
+} ____cacheline_aligned;
+
+struct iscsi_wwn_stat_grps {
+	struct config_group	iscsi_stat_group;
+	struct config_group	iscsi_instance_group;
+	struct config_group	iscsi_sess_err_group;
+	struct config_group	iscsi_tgt_attr_group;
+	struct config_group	iscsi_login_stats_group;
+	struct config_group	iscsi_logout_stats_group;
+};
+
+struct iscsi_tiqn {
+#define ISCSI_IQN_LEN				224
+	unsigned char		tiqn[ISCSI_IQN_LEN];
+	enum tiqn_state_table	tiqn_state;
+	int			tiqn_access_count;
+	u32			tiqn_active_tpgs;
+	u32			tiqn_ntpgs;
+	u32			tiqn_num_tpg_nps;
+	u32			tiqn_nsessions;
+	struct list_head	tiqn_list;
+	struct list_head	tiqn_tpg_list;
+	spinlock_t		tiqn_state_lock;
+	spinlock_t		tiqn_tpg_lock;
+	struct se_wwn		tiqn_wwn;
+	struct iscsi_wwn_stat_grps tiqn_stat_grps;
+	int			tiqn_index;
+	struct iscsi_sess_err_stats  sess_err_stats;
+	struct iscsi_login_stats     login_stats;
+	struct iscsi_logout_stats    logout_stats;
+} ____cacheline_aligned;
+
+struct iscsit_global {
+	/* In core shutdown */
+	u32			in_shutdown;
+	u32			active_ts;
+	/* Unique identifier used for the authentication daemon */
+	u32			auth_id;
+	u32			inactive_ts;
+#define ISCSIT_BITMAP_BITS	262144
+	/* Thread Set bitmap pointer */
+	unsigned long		*ts_bitmap;
+	spinlock_t		ts_bitmap_lock;
+	/* Used for iSCSI discovery session authentication */
+	struct iscsi_node_acl	discovery_acl;
+	struct iscsi_portal_group	*discovery_tpg;
+};
+
+static inline u32 session_get_next_ttt(struct iscsi_session *session)
+{
+	u32 ttt;
+
+	spin_lock_bh(&session->ttt_lock);
+	ttt = session->targ_xfer_tag++;
+	if (ttt == 0xFFFFFFFF)
+		ttt = session->targ_xfer_tag++;
+	spin_unlock_bh(&session->ttt_lock);
+
+	return ttt;
+}
+
+extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t);
+#endif /* ISCSI_TARGET_CORE_H */