From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by mail19.linbit.com (LINBIT Mail Daemon) with ESMTP id 8076842010D for ; Mon, 26 Feb 2024 12:26:06 +0100 (CET) From: Christoph Hellwig To: Jens Axboe , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai , Philipp Reisner , Lars Ellenberg , =?UTF-8?q?Christoph=20B=C3=B6hmwalder?= Subject: [PATCH 04/16] md: add queue limit helpers Date: Mon, 26 Feb 2024 11:29:52 +0100 Message-Id: <20240226103004.281412-5-hch@lst.de> In-Reply-To: <20240226103004.281412-1-hch@lst.de> References: <20240226103004.281412-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-raid@vger.kernel.org, drbd-dev@lists.linbit.com List-Id: "*Coordination* of development, patches, contributions -- *Questions* \(even to developers\) go to drbd-user, please." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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; -- 2.39.2