From patchwork Fri Feb 23 16:12:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13569418 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC80F81ACE; Fri, 23 Feb 2024 16:13:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708704793; cv=none; b=PFYh0fK0z74avMLkiWk6HEiMSL2vajOZfNWt9+vNzsWeI/CnJ/0wJejbSNUCAeK/HD2UUFJgut1SGqLLzAIVKfFBY7ARvvENF8/x04xZU0jV/42kvAcjiOf40huBpWjd60vjB7Ci/MJN2R94ihWm4lSgSDV0hsgrLdhC9QR/q4w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708704793; c=relaxed/simple; bh=qpx5ZfsXN/PL+1OUdl1bDP6qACVTtOCO66trsr+igSI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Xa/FDW86GL4AOEt+fhi/gkpCbz2HCtWDwadCOTT0jmjaUFGhDDUlQfg+cvN5ZtkpOcxWeqrrYqjBU1iJMr5xpZTQ2luLTOgMRKFIl9dNKo+6rw7WKA8bwX8qPS/g1qBOjE0FxivrspMBYDyWn4bYRs5vmeIxz59fOoyh41XvlEI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=mCavDDXd; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="mCavDDXd" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=58hQxzCOBh09HYswQ4p4ZVLnJZqyofksZjan/0dqSg4=; b=mCavDDXdHuHwdJUogbCk//k9SD a81mbbYTtPnTNXdGxP4QVMAJ24LgdaScMzxUzx6kRpqD2DPVg3j+22ODiaiiu4c9izvnnwggB9GMG ttcsXF1e5qWclwqoSw3feMCKSVRc47AubeB4EUkpDrjzWUt9A3pZCs/iESFxaAXSnQ0d9UM2jYm3K fmsuUmgFPIy1T5+VsZcqziB4SwdlqCDEhZNQDetqGJGd1baRQBU3ichLP97/T94SbqszcR74ph8SV iG368x+DZNK/JLsdZyAX0yNayJJxHV6hp7+rSZ+k28F4Mdurz5giR5KJlbVMK5maRrNNjrwxtw8Ro j+Md2EWg==; Received: from [2001:4bb8:19a:62b2:c70:4a89:bc61:3] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdYAd-0000000AAkD-4BEM; Fri, 23 Feb 2024 16:13:08 +0000 From: Christoph Hellwig To: Jens Axboe , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai Cc: dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-raid@vger.kernel.org Subject: [PATCH 4/9] md: add queue limit helpers Date: Fri, 23 Feb 2024 17:12:42 +0100 Message-Id: <20240223161247.3998821-5-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240223161247.3998821-1-hch@lst.de> References: <20240223161247.3998821-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Add a few helpers that wrap the block queue limits API for use in MD. Signed-off-by: Christoph Hellwig --- drivers/md/md.c | 37 +++++++++++++++++++++++++++++++++++++ drivers/md/md.h | 3 +++ 2 files changed, 40 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 75266c34b1f99b..23823823f80c6b 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5699,6 +5699,43 @@ static const struct kobj_type md_ktype = { int mdp_major = 0; +/* stack the limit for all rdevs into lim */ +void mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim) +{ + struct md_rdev *rdev; + + rdev_for_each(rdev, mddev) { + queue_limits_stack_bdev(lim, rdev->bdev, rdev->data_offset, + mddev->gendisk->disk_name); + } +} +EXPORT_SYMBOL_GPL(mddev_stack_rdev_limits); + +/* apply the extra stacking limits from a new rdev into mddev */ +int mddev_stack_new_rdev(struct mddev *mddev, struct md_rdev *rdev) +{ + struct queue_limits lim = queue_limits_start_update(mddev->queue); + + queue_limits_stack_bdev(&lim, rdev->bdev, rdev->data_offset, + mddev->gendisk->disk_name); + return queue_limits_commit_update(mddev->queue, &lim); +} +EXPORT_SYMBOL_GPL(mddev_stack_new_rdev); + +/* update the optimal I/O size after a reshape */ +void mddev_update_io_opt(struct mddev *mddev, unsigned int nr_stripes) +{ + struct queue_limits lim; + int ret; + + blk_mq_freeze_queue(mddev->queue); + lim = queue_limits_start_update(mddev->queue); + lim.io_opt = lim.io_min * nr_stripes; + ret = queue_limits_commit_update(mddev->queue, &lim); + blk_mq_unfreeze_queue(mddev->queue); +} +EXPORT_SYMBOL_GPL(mddev_update_io_opt); + static void mddev_delayed_delete(struct work_struct *ws) { struct mddev *mddev = container_of(ws, struct mddev, del_work); diff --git a/drivers/md/md.h b/drivers/md/md.h index 8d881cc597992f..25b19614aa3239 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -860,6 +860,9 @@ void md_autostart_arrays(int part); int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info); int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info); int do_md_run(struct mddev *mddev); +void mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim); +int mddev_stack_new_rdev(struct mddev *mddev, struct md_rdev *rdev); +void mddev_update_io_opt(struct mddev *mddev, unsigned int nr_stripes); extern const struct block_device_operations md_fops;