From patchwork Thu Nov 14 14:34:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11243879 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B5890913 for ; Thu, 14 Nov 2019 14:34:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 958FE2070E for ; Thu, 14 Nov 2019 14:34:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="AHLN1wTo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726598AbfKNOew (ORCPT ); Thu, 14 Nov 2019 09:34:52 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:38548 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726214AbfKNOew (ORCPT ); Thu, 14 Nov 2019 09:34:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; 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:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=smMIf5d5Q5aKw/SzyUzCMvGHgO1WCyubOuxyXylTzIg=; b=AHLN1wTobfiankSBhemFuo0+Ul hmb0DECVuJ9EuC1gpdzZVcJRJxJJSULEYQt4aFbJnxTR2DiVWCUiw2fmIcIHtx4AbZyoyqdOYZTle lgDhOp31NyzCiBXohJOmI1mD1ELdwgStUXP6EHyyLp9QN0LiInOdZB5ywvOORVwUkXUthTGk637zQ +xic6QEYk/gmBAzwm5jti9CgihJ9XjMhTtXiPE6yZu6FWOxnVB54fcUemYwsND1fqt4x9ccuAG/rq u6z+F1QXhOEGsNVuIRZyRqySlAINSZGReFFpay5tv5+4aaO5q6N3fk2768+rPNlcofaKZFpVBXewp p0k81OyA==; Received: from [2001:4bb8:180:3806:c70:4a89:bc61:6] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iVGCw-0004kH-Tt; Thu, 14 Nov 2019 14:34:51 +0000 From: Christoph Hellwig To: Jens Axboe , Jan Kara Cc: linux-block@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH 4/7] block: fix bdev_disk_changed for non-partitioned devices Date: Thu, 14 Nov 2019 15:34:35 +0100 Message-Id: <20191114143438.14681-5-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191114143438.14681-1-hch@lst.de> References: <20191114143438.14681-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org We still have to set the capacity to 0 if invalidating or call revalidate_disk if not even if the disk has no partitions. Fix that by merging rescan_partitions into bdev_disk_changed and just stubbing out blk_add_partitions and blk_drop_partitions for non-partitioned devices. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Hannes Reinecke --- block/ioctl.c | 6 ++---- block/partition-generic.c | 5 +++++ fs/block_dev.c | 27 ++++++++------------------- include/linux/genhd.h | 1 + 4 files changed, 16 insertions(+), 23 deletions(-) diff --git a/block/ioctl.c b/block/ioctl.c index f6576a6d5778..5ccd9f016594 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -162,16 +162,14 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user */ int __blkdev_reread_part(struct block_device *bdev) { - struct gendisk *disk = bdev->bd_disk; - - if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains) + if (!disk_part_scan_enabled(bdev->bd_disk) || bdev != bdev->bd_contains) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EACCES; lockdep_assert_held(&bdev->bd_mutex); - return rescan_partitions(disk, bdev, false); + return bdev_disk_changed(bdev, false); } EXPORT_SYMBOL(__blkdev_reread_part); diff --git a/block/partition-generic.c b/block/partition-generic.c index 2cbc23f6032c..61487421a319 100644 --- a/block/partition-generic.c +++ b/block/partition-generic.c @@ -445,6 +445,8 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev) struct hd_struct *part; int res; + if (!disk_part_scan_enabled(disk)) + return 0; if (bdev->bd_part_count || bdev->bd_super) return -EBUSY; res = invalidate_partition(disk, 0); @@ -514,6 +516,9 @@ int blk_add_partitions(struct gendisk *disk, struct block_device *bdev) struct parsed_partitions *state; int ret = -EAGAIN, p, highest; + if (!disk_part_scan_enabled(disk)) + return 0; + state = check_partition(disk, bdev); if (!state) return 0; diff --git a/fs/block_dev.c b/fs/block_dev.c index f0710085e1f1..ae16466a67f7 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1508,9 +1508,9 @@ EXPORT_SYMBOL(bd_set_size); static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part); -static int rescan_partitions(struct gendisk *disk, struct block_device *bdev, - bool invalidate) +int bdev_disk_changed(struct block_device *bdev, bool invalidate) { + struct gendisk *disk = bdev->bd_disk; int ret; rescan: @@ -1526,30 +1526,19 @@ static int rescan_partitions(struct gendisk *disk, struct block_device *bdev, check_disk_size_change(disk, bdev, !invalidate); bdev->bd_invalidated = 0; - if (!get_capacity(disk)) { + if (get_capacity(disk)) { + ret = blk_add_partitions(disk, bdev); + if (ret == -EAGAIN) + goto rescan; + } else { /* * Tell userspace that the media / partition table may have * changed. */ kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE); - return 0; } - - ret = blk_add_partitions(disk, bdev); - if (ret == -EAGAIN) - goto rescan; - return ret; -} - -static void bdev_disk_changed(struct block_device *bdev, bool invalidate) -{ - if (disk_part_scan_enabled(bdev->bd_disk)) { - rescan_partitions(bdev->bd_disk, bdev, invalidate); - } else { - check_disk_size_change(bdev->bd_disk, bdev, !invalidate); - bdev->bd_invalidated = 0; - } + return ret; } /* diff --git a/include/linux/genhd.h b/include/linux/genhd.h index f5cffbf63abf..8bb63027e4d6 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -621,6 +621,7 @@ extern void blk_invalidate_devt(dev_t devt); extern dev_t blk_lookup_devt(const char *name, int partno); extern char *disk_name (struct gendisk *hd, int partno, char *buf); +int bdev_disk_changed(struct block_device *bdev, bool invalidate); int blk_add_partitions(struct gendisk *disk, struct block_device *bdev); int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev); extern int disk_expand_part_tbl(struct gendisk *disk, int target);