iscsi-target: Initial traditional TCP conversion to iscsit_transport

This patch performs the initial conversion of existing traditional iscsi
to use iscsit_transport API callers.  This includes:

- iscsi-np cleanups for iscsit_transport_type
- Add iscsi-np transport calls w/ ->iscsit_setup_up() and ->iscsit_free_np()
- Convert login thread process context to use ->iscsit_accept_np() for
  connections with pre-allocated struct iscsi_conn
- Convert existing socket accept code to iscsit_accept_np()
- Convert login RX/TX callers to use ->iscsit_get_login_rx() and
  ->iscsit_put_login_tx() to exchange request/response PDUs
- Convert existing socket login RX/TX calls into iscsit_get_login_rx()
  and iscsit_put_login_tx()
- Change iscsit_close_connection() to invoke ->iscsit_free_conn() +
  iscsit_put_transport() calls.
- Add iscsit_register_transport() + iscsit_unregister_transport() calls
  to module init/exit

v4 changes:

- Add missing iscsit_put_transport() call in iscsi_target_setup_login_socket()
  failure case

v2 changes:

- Update module init/exit to use register_transport() + unregister_transport()

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 7 insertions, 20 deletions

diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 7ce350578c82..4cf1e7f94ac3 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -24,6 +24,7 @@
 #include <target/target_core_base.h>
 #include <target/target_core_fabric.h>
 #include <target/target_core_configfs.h>
+#include <target/iscsi/iscsi_transport.h>
 
 #include "iscsi_target_core.h"
 #include "iscsi_target_parameters.h"
@@ -1226,34 +1227,19 @@ send_datacrc:
  */
 int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
 {
-	u8 iscsi_hdr[ISCSI_HDR_LEN];
-	int err;
-	struct kvec iov;
 	struct iscsi_login_rsp *hdr;
+	struct iscsi_login *login = conn->conn_login;
 
+	login->login_failed = 1;
 	iscsit_collect_login_stats(conn, status_class, status_detail);
 
-	memset(&iov, 0, sizeof(struct kvec));
-	memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN);
-
-	hdr	= (struct iscsi_login_rsp *)&iscsi_hdr;
+	hdr	= (struct iscsi_login_rsp *)&login->rsp[0];
 	hdr->opcode		= ISCSI_OP_LOGIN_RSP;
 	hdr->status_class	= status_class;
 	hdr->status_detail	= status_detail;
 	hdr->itt		= conn->login_itt;
 
-	iov.iov_base		= &iscsi_hdr;
-	iov.iov_len		= ISCSI_HDR_LEN;
-
-	PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN);
-
-	err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN);
-	if (err != ISCSI_HDR_LEN) {
-		pr_err("tx_data returned less than expected\n");
-		return -1;
-	}
-
-	return 0;
+	return conn->conn_transport->iscsit_put_login_tx(conn, login, 0);
 }
 
 void iscsit_print_session_params(struct iscsi_session *sess)
@@ -1432,7 +1418,8 @@ void iscsit_collect_login_stats(
 		strcpy(ls->last_intr_fail_name,
 		       (intrname ? intrname->value : "Unknown"));
 
-		ls->last_intr_fail_ip_family = conn->sock->sk->sk_family;
+		ls->last_intr_fail_ip_family = conn->login_family;
+
 		snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE,
 				"%s", conn->login_ip);
 		ls->last_fail_time = get_jiffies_64();