Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758213AbZGHIYa (ORCPT ); Wed, 8 Jul 2009 04:24:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756215AbZGHIYR (ORCPT ); Wed, 8 Jul 2009 04:24:17 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50894 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755294AbZGHIYQ (ORCPT ); Wed, 8 Jul 2009 04:24:16 -0400 From: Nikanth Karthikesan Organization: suse.de To: jens.axboe@oracle.com Subject: [PATCH] Send uevents for disk write_protect changes Date: Wed, 8 Jul 2009 13:55:52 +0530 User-Agent: KMail/1.11.1 (Linux/2.6.31-rc2-0.1-default; KDE/4.2.1; x86_64; ; ) Cc: Hannes Reinecke , linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907081355.53226.knikanth@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1542 Lines: 53 From: Hannes Reinecke Subject: Send uevents for write_protect changes Whenever a block device changes it's read-only attribute notify the userspace about it. Signed-off-by: Hannes Reinecke Signed-off-by: Nikanth Karthikesan --- diff --git a/block/genhd.c b/block/genhd.c index f4c64c2..b89328e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1215,6 +1215,16 @@ void put_disk(struct gendisk *disk) EXPORT_SYMBOL(put_disk); +static void set_disk_ro_uevent(struct gendisk *gd, int ro) +{ + char event[] = "DISK_RO=1"; + char *envp[] = { event, NULL }; + + if (!ro) + event[8] = '0'; + kobject_uevent_env(&disk_to_dev(gd)->kobj, KOBJ_CHANGE, envp); +} + void set_device_ro(struct block_device *bdev, int flag) { bdev->bd_part->policy = flag; @@ -1227,8 +1237,12 @@ void set_disk_ro(struct gendisk *disk, int flag) struct disk_part_iter piter; struct hd_struct *part; - disk_part_iter_init(&piter, disk, - DISK_PITER_INCL_EMPTY | DISK_PITER_INCL_PART0); + if (disk->part0.policy != flag) { + set_disk_ro_uevent(disk, flag); + disk->part0.policy = flag; + } + + disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY); while ((part = disk_part_iter_next(&piter))) part->policy = flag; disk_part_iter_exit(&piter); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/