[SCSI] libiscsi, iscsi class: set tmf to a safe default and export in sysfs

Older tools will not be setting the tmf time outs since they
did not exists, so set them to a safe default.

And export abort and lu reset timeout values in sysfs.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/libiscsi.c

@@ -1732,6 +1732,8 @@ iscsi_session_setup(struct iscsi_transport *iscsit,
 	session->host = shost;
 	session->state = ISCSI_STATE_FREE;
 	session->fast_abort = 1;
+	session->lu_reset_timeout = 15;
+	session->abort_timeout = 10;
 	session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
 	session->cmds_max = cmds_max;
 	session->queued_cmdsn = session->cmdsn = initial_cmdsn;

drivers/scsi/scsi_transport_iscsi.c

@@ -30,7 +30,7 @@
 #include <scsi/scsi_transport_iscsi.h>
 #include <scsi/iscsi_if.h>
 
-#define ISCSI_SESSION_ATTRS 16
+#define ISCSI_SESSION_ATTRS 18
 #define ISCSI_CONN_ATTRS 11
 #define ISCSI_HOST_ATTRS 4
 #define ISCSI_TRANSPORT_VERSION "2.0-724"
@@ -1242,7 +1242,9 @@ iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
-iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 1);
+iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
+iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
+iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
 
 #define iscsi_priv_session_attr_show(field, format)			\
 static ssize_t								\
@@ -1467,6 +1469,8 @@ iscsi_register_transport(struct iscsi_transport *tt)
 	SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD);
 	SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN);
 	SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
+	SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO);
+	SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO);
 	SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
 
 	BUG_ON(count > ISCSI_SESSION_ATTRS);