From patchwork Tue Dec 14 21:17:13 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonthan Brassow X-Patchwork-Id: 411471 Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oBELJQQW029608 for ; Tue, 14 Dec 2010 21:19:46 GMT Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBELHpRj009326; Tue, 14 Dec 2010 16:17:51 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBELHKdq001082 for ; Tue, 14 Dec 2010 16:17:20 -0500 Received: from hydrogen.msp.redhat.com (hydrogen.msp.redhat.com [10.15.80.1]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oBELHEth021863 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 14 Dec 2010 16:17:14 -0500 Received: from hydrogen.msp.redhat.com ([127.0.0.1]) by hydrogen.msp.redhat.com (8.14.1/8.14.1) with ESMTP id oBELHDFU015747 for ; Tue, 14 Dec 2010 15:17:13 -0600 Received: (from jbrassow@localhost) by hydrogen.msp.redhat.com (8.14.1/8.14.1/Submit) id oBELHDR0015746 for dm-devel@redhat.com; Tue, 14 Dec 2010 15:17:13 -0600 Date: Tue, 14 Dec 2010 15:17:13 -0600 From: Jonathan Brassow Message-Id: <201012142117.oBELHDR0015746@hydrogen.msp.redhat.com> To: dm-devel@redhat.com X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-loop: dm-devel@redhat.com Subject: [dm-devel] [PATCH 7 of 8] dm raid iterate_devices and io_hints X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk Reply-To: device-mapper development List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Tue, 14 Dec 2010 21:19:47 +0000 (UTC) Index: linux-2.6/drivers/md/dm-raid.c =================================================================== --- linux-2.6.orig/drivers/md/dm-raid.c +++ linux-2.6/drivers/md/dm-raid.c @@ -569,6 +569,37 @@ static int raid_status(struct dm_target return 0; } +static int raid_iterate_devices(struct dm_target *ti, + iterate_devices_callout_fn fn, + void *data) +{ + struct raid_set *rs = ti->private; + int ret = 0; + unsigned i = 0; + + for (i = 0; !ret && i < rs->md.raid_disks; i++) + if (rs->dev[i].data_dev) + ret = fn(ti, + rs->dev[i].data_dev, + 0, /* No offset on data devs */ + rs->md.dev_sectors, + data); + + return ret; +} + +static void raid_io_hints(struct dm_target *ti, + struct queue_limits *limits) +{ + struct raid_set *rs = ti->private; + unsigned chunk_size = rs->md.chunk_sectors << 9; + raid5_conf_t *conf = rs->md.private; + + blk_limits_io_min(limits, chunk_size); + blk_limits_io_opt(limits, chunk_size * + (conf->raid_disks - conf->max_degraded)); +} + static struct target_type raid_target = { .name = "raid", .version = {1, 0, 0}, @@ -577,6 +608,8 @@ static struct target_type raid_target = .dtr = raid_dtr, .map = raid_map, .status = raid_status, + .iterate_devices = raid_iterate_devices, + .io_hints = raid_io_hints, }; static int __init dm_raid_init(void)