From patchwork Wed Nov 11 10:34:39 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 7594801 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 17FFDBF90C for ; Wed, 11 Nov 2015 10:34:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3123020529 for ; Wed, 11 Nov 2015 10:34:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 381F920527 for ; Wed, 11 Nov 2015 10:34:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752100AbbKKKeo (ORCPT ); Wed, 11 Nov 2015 05:34:44 -0500 Received: from mx2.suse.de ([195.135.220.15]:44264 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751508AbbKKKen (ORCPT ); Wed, 11 Nov 2015 05:34:43 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 58F8FAAC7; Wed, 11 Nov 2015 10:34:21 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , Ewan Milne , linux-scsi@vger.kernel.org, James Bottomley , Hannes Reinecke Subject: [PATCH 1/2] scsi_transport_fc: implement 'disable_target_scan' module parameter Date: Wed, 11 Nov 2015 11:34:39 +0100 Message-Id: <1447238080-109942-2-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.6 In-Reply-To: <1447238080-109942-1-git-send-email-hare@suse.de> References: <1447238080-109942-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On larger installations it makes sense to disable the target scan per default on boot, and scan the required LUNs directly via udev rules. Signed-off-by: Hannes Reinecke Reviewed-by: Shane Seymour --- drivers/scsi/scsi_transport_fc.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 454cc28..72954a8 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -71,6 +71,18 @@ MODULE_PARM_DESC(dev_loss_tmo, " fast_io_fail_tmo is not set."); /* + * disable_target_scan: Disable target scan per default + * useful on larger installations where only a small + * number of LUNs are required for booting. + */ +static bool fc_disable_target_scan; + +module_param_named(disable_target_scan, fc_disable_target_scan, + bool, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(disable_target_scan, + "Disable target scan on remote ports (default=0)"); + +/* * Redefine so that we can have same named attributes in the * sdev/starget/host objects. */ @@ -3282,10 +3294,14 @@ fc_scsi_scan_rport(struct work_struct *work) struct Scsi_Host *shost = rport_to_shost(rport); struct fc_internal *i = to_fc_internal(shost->transportt); unsigned long flags; + bool disable_target_scan; + + disable_target_scan = fc_disable_target_scan ? + fc_disable_target_scan : i->f->disable_target_scan; if ((rport->port_state == FC_PORTSTATE_ONLINE) && (rport->roles & FC_PORT_ROLE_FCP_TARGET) && - !(i->f->disable_target_scan)) { + !disable_target_scan) { scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id, SCAN_WILD_CARD, 1); }