From patchwork Tue Nov 24 13:27:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11928857 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CE33C825B6 for ; Tue, 24 Nov 2020 13:29:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 623C6206F9 for ; Tue, 24 Nov 2020 13:29:19 +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="iuyrZ6v9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 623C6206F9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1AB1A6B00E3; Tue, 24 Nov 2020 08:28:47 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 135126B00E4; Tue, 24 Nov 2020 08:28:47 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F19676B00E5; Tue, 24 Nov 2020 08:28:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0222.hostedemail.com [216.40.44.222]) by kanga.kvack.org (Postfix) with ESMTP id D91D86B00E3 for ; Tue, 24 Nov 2020 08:28:46 -0500 (EST) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A308A181AEF1E for ; Tue, 24 Nov 2020 13:28:46 +0000 (UTC) X-FDA: 77519391852.07.drop20_2f12cf72736e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin07.hostedemail.com (Postfix) with ESMTP id 89FF01803F9AB for ; Tue, 24 Nov 2020 13:28:46 +0000 (UTC) X-HE-Tag: drop20_2f12cf72736e X-Filterd-Recvd-Size: 7654 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf26.hostedemail.com (Postfix) with ESMTP for ; Tue, 24 Nov 2020 13:28:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=1wdTghj4fAZYDMEoMIijyWaUffoUw73Ru2rPfTzIwgc=; b=iuyrZ6v9lOV+HmLY++2sL1Tphw RstNxNQbVHznNk65hqoXvXwyS2SxZeKCbg82rqAa4OoHom6hfCotYBQDqYAWw1z7h2qe5AtwL40YH pBWGQVEI8t2986Trhrw4ARuUf+uIC6KWaSH3uNwAKDcQFYZw/3SW7lDafQ8OOn0HUoOncreV3btKH ODAv7ImyQoKl/hMu3FGvOWhHWdbWS5MKSe/MRvcGAShE6UQB/FLHFc9L49FARzuarAUj6Qb7J9kUo goEygVbNrIrONzqSmE36MDIEQOQwyxFUA0fjky85vXz+mIOI+RNIu5gA2ev77SpfiLP3LSaTl5ArA qhnIJE8w==; Received: from [2001:4bb8:180:5443:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1khYMf-0006WP-Qt; Tue, 24 Nov 2020 13:28:14 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Konrad Rzeszutek Wilk , Coly Li , Mike Snitzer , Greg Kroah-Hartman , Jan Kara , Johannes Thumshirn , dm-devel@redhat.com, Richard Weinberger , Jan Kara , linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 13/45] block: add a bdev_kobj helper Date: Tue, 24 Nov 2020 14:27:19 +0100 Message-Id: <20201124132751.3747337-14-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201124132751.3747337-1-hch@lst.de> References: <20201124132751.3747337-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a little helper to find the kobject for a struct block_device. Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn Acked-by: Tejun Heo --- drivers/md/bcache/super.c | 7 ++----- drivers/md/md.c | 4 +--- fs/block_dev.c | 6 +++--- fs/btrfs/sysfs.c | 15 +++------------ include/linux/blk_types.h | 3 +++ 5 files changed, 12 insertions(+), 23 deletions(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 46a00134a36ae1..a6a5e21e4fd136 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1447,8 +1447,7 @@ static int register_bdev(struct cache_sb *sb, struct cache_sb_disk *sb_disk, goto err; err = "error creating kobject"; - if (kobject_add(&dc->disk.kobj, &part_to_dev(bdev->bd_part)->kobj, - "bcache")) + if (kobject_add(&dc->disk.kobj, bdev_kobj(bdev), "bcache")) goto err; if (bch_cache_accounting_add_kobjs(&dc->accounting, &dc->disk.kobj)) goto err; @@ -2342,9 +2341,7 @@ static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk, goto err; } - if (kobject_add(&ca->kobj, - &part_to_dev(bdev->bd_part)->kobj, - "bcache")) { + if (kobject_add(&ca->kobj, bdev_kobj(bdev), "bcache")) { err = "error calling kobject_add"; ret = -ENOMEM; goto out; diff --git a/drivers/md/md.c b/drivers/md/md.c index b2edf5e0f965b5..7ce6047c856ea2 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2414,7 +2414,6 @@ EXPORT_SYMBOL(md_integrity_add_rdev); static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) { char b[BDEVNAME_SIZE]; - struct kobject *ko; int err; /* prevent duplicates */ @@ -2477,9 +2476,8 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev) if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b))) goto fail; - ko = &part_to_dev(rdev->bdev->bd_part)->kobj; /* failure here is OK */ - err = sysfs_create_link(&rdev->kobj, ko, "block"); + err = sysfs_create_link(&rdev->kobj, bdev_kobj(rdev->bdev), "block"); rdev->sysfs_state = sysfs_get_dirent_safe(rdev->kobj.sd, "state"); rdev->sysfs_unack_badblocks = sysfs_get_dirent_safe(rdev->kobj.sd, "unacknowledged_bad_blocks"); diff --git a/fs/block_dev.c b/fs/block_dev.c index 60492620d51866..f6a2a06ad262fa 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1242,7 +1242,7 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk) holder->disk = disk; holder->refcnt = 1; - ret = add_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj); + ret = add_symlink(disk->slave_dir, bdev_kobj(bdev)); if (ret) goto out_free; @@ -1259,7 +1259,7 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk) goto out_unlock; out_del: - del_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj); + del_symlink(disk->slave_dir, bdev_kobj(bdev)); out_free: kfree(holder); out_unlock: @@ -1287,7 +1287,7 @@ void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk) holder = bd_find_holder_disk(bdev, disk); if (!WARN_ON_ONCE(holder == NULL) && !--holder->refcnt) { - del_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj); + del_symlink(disk->slave_dir, bdev_kobj(bdev)); del_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj); kobject_put(bdev->bd_part->holder_dir); diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 279d9262b676d4..24b6c6dc69000a 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -1232,8 +1232,6 @@ int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info, void btrfs_sysfs_remove_device(struct btrfs_device *device) { - struct hd_struct *disk; - struct kobject *disk_kobj; struct kobject *devices_kobj; /* @@ -1243,11 +1241,8 @@ void btrfs_sysfs_remove_device(struct btrfs_device *device) devices_kobj = device->fs_info->fs_devices->devices_kobj; ASSERT(devices_kobj); - if (device->bdev) { - disk = device->bdev->bd_part; - disk_kobj = &part_to_dev(disk)->kobj; - sysfs_remove_link(devices_kobj, disk_kobj->name); - } + if (device->bdev) + sysfs_remove_link(devices_kobj, bdev_kobj(device->bdev)->name); if (device->devid_kobj.state_initialized) { kobject_del(&device->devid_kobj); @@ -1353,11 +1348,7 @@ int btrfs_sysfs_add_device(struct btrfs_device *device) nofs_flag = memalloc_nofs_save(); if (device->bdev) { - struct hd_struct *disk; - struct kobject *disk_kobj; - - disk = device->bdev->bd_part; - disk_kobj = &part_to_dev(disk)->kobj; + struct kobject *disk_kobj = bdev_kobj(device->bdev); ret = sysfs_create_link(devices_kobj, disk_kobj, disk_kobj->name); if (ret) { diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index ebfb4e7c1fd125..9698f459cc65c9 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -49,6 +49,9 @@ struct block_device { struct super_block *bd_fsfreeze_sb; } __randomize_layout; +#define bdev_kobj(_bdev) \ + (&part_to_dev((_bdev)->bd_part)->kobj) + /* * Block error status values. See block/blk-core:blk_errors for the details. * Alpha cannot write a byte atomically, so we need to use 32-bit value.