From owner-freebsd-scsi@FreeBSD.ORG  Thu Oct 13 16:47:09 2005
Return-Path: <owner-freebsd-scsi@FreeBSD.ORG>
X-Original-To: scsi@freebsd.org
Delivered-To: freebsd-scsi@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 00CD216A41F;
	Thu, 13 Oct 2005 16:47:08 +0000 (GMT)
	(envelope-from danny@cs.huji.ac.il)
Received: from cs1.cs.huji.ac.il (cs1.cs.huji.ac.il [132.65.16.10])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 90BCB43D45;
	Thu, 13 Oct 2005 16:47:08 +0000 (GMT)
	(envelope-from danny@cs.huji.ac.il)
Received: from pampa.cs.huji.ac.il ([132.65.80.32])
	by cs1.cs.huji.ac.il with esmtp
	id 1EQ6EU-0001vS-Ax; Thu, 13 Oct 2005 18:47:06 +0200
X-Mailer: exmh version 2.7.0 06/18/2004 with nmh-1.0.4
To: scsi@freebsd.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Thu, 13 Oct 2005 18:47:06 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
Message-ID: <E1EQ6EU-0001vS-Ax@cs1.cs.huji.ac.il>
Cc: "Kenneth D. Merry" <ken@freebsd.org>
Subject: iSCSI/CAM & tags
X-BeenThere: freebsd-scsi@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SCSI subsystem <freebsd-scsi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-scsi>,
	<mailto:freebsd-scsi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-scsi>
List-Post: <mailto:freebsd-scsi@freebsd.org>
List-Help: <mailto:freebsd-scsi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-scsi>,
	<mailto:freebsd-scsi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 13 Oct 2005 16:47:09 -0000


I need to 'syncronize' the discovery of devices on the target with
the iscsi module so that is can set the tag opening size. At the
moment im doing this in the user mode control (iscontrol) with
a sleep.
     ...
     sleep(5);
     // this call will return the needed info:
     //	cam_id, target_id, nluns, luns[].
     if(ioctl(sess->fd, ISCSIGETCAM, &sess->cam) != 0) {
	  syslog(LOG_WARNING, "ISCSIGETCAM failed: %d", errno);
	  return;
     }
     ...
     while(sess->camdev == NULL) {
	       sess->camdev = cam_open_btl(sess->cam.path_id,
                                           sess->cam.target_id,
					   sess->cam.target_lun[i], O_RDWR,
                                           NULL);
	       if(sess->camdev != NULL) {
		    if(count-- == 0) {
			 syslog(LOG_WARNING, "%s", cam_errbuf);
			 debug(3, "%s", cam_errbuf);
			 return;
		    }
	       }
	       sleep(1);
     }

There must be a better way.
any ideas are welcomed.

	danny