From patchwork Tue Jun 6 07:39:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13268534 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45353C7EE2E for ; Tue, 6 Jun 2023 07:43:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236353AbjFFHnI (ORCPT ); Tue, 6 Jun 2023 03:43:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234238AbjFFHlv (ORCPT ); Tue, 6 Jun 2023 03:41:51 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C40C1E79; Tue, 6 Jun 2023 00:41:10 -0700 (PDT) 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=R/taWYn/VrvQVP7vJekvmlkcZ3skKwwlLMp5HGMR5SQ=; b=zg6tGoNyOaOlC2ng1tcChxTDEU LdAZ4j1dxKst+JUHQ7DfSAnPcWCIcboHQ0f+ymC6ACmj4ou4JBddjNg/SNyZd8k6IZzymPXRmHYkc pJv2J67DSIdPO9e3djSugFbPGi4YBMT7AyNMl/pwqstPo/nsGaKJVRejuqbjtppr1BlfDcK3sQzUd yeJMpsetPbMhB1CbT2g+jKQ6Qcga2qnvsXabnR7Lo6V4uWhybFuvVpwBsQX0aZX6C7Xiys/5yYwyz PJx+kGGfEsHhO3Tk20F7UdXeu120UGnUS2YrhImUjFIHlVJp9Ya5Xlta4wlVLfHhIt50MyGbWuODg vQRWVfQg==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1q6RJB-000ZUg-1x; Tue, 06 Jun 2023 07:40:50 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Richard Weinberger , Josef Bacik , "Md. Haris Iqbal" , Jack Wang , Phillip Potter , Coly Li , Miquel Raynal , Vignesh Raghavendra , "Martin K. Petersen" , Chris Mason , David Sterba , Alexander Viro , Christian Brauner , "Rafael J. Wysocki" , Pavel Machek , dm-devel@redhat.com, linux-block@vger.kernel.org, linux-um@lists.infradead.org, linux-scsi@vger.kernel.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-btrfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH 17/31] block: add a sb_open_mode helper Date: Tue, 6 Jun 2023 09:39:36 +0200 Message-Id: <20230606073950.225178-18-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230606073950.225178-1-hch@lst.de> References: <20230606073950.225178-1-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 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add a helper to return the open flags for blkdev_get_by* for passed in super block flags instead of open coding the logic in many places. Signed-off-by: Christoph Hellwig Acked-by: Christian Brauner Reviewed-by: Hannes Reinecke --- fs/btrfs/super.c | 5 +---- fs/nilfs2/super.c | 7 ++----- fs/super.c | 15 ++++----------- include/linux/blkdev.h | 7 +++++++ 4 files changed, 14 insertions(+), 20 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 1a2ee9407f5414..fd02b92e39106a 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1440,12 +1440,9 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, struct btrfs_fs_devices *fs_devices = NULL; struct btrfs_fs_info *fs_info = NULL; void *new_sec_opts = NULL; - fmode_t mode = FMODE_READ; + fmode_t mode = sb_open_mode(flags); int error = 0; - if (!(flags & SB_RDONLY)) - mode |= FMODE_WRITE; - if (data) { error = security_sb_eat_lsm_opts(data, &new_sec_opts); if (error) diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 61d5e79a5e81df..a41fd84d4e28ab 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -1278,14 +1278,11 @@ nilfs_mount(struct file_system_type *fs_type, int flags, { struct nilfs_super_data sd; struct super_block *s; - fmode_t mode = FMODE_READ; struct dentry *root_dentry; int err, s_new = false; - if (!(flags & SB_RDONLY)) - mode |= FMODE_WRITE; - - sd.bdev = blkdev_get_by_path(dev_name, mode, fs_type, NULL); + sd.bdev = blkdev_get_by_path(dev_name, sb_open_mode(flags), fs_type, + NULL); if (IS_ERR(sd.bdev)) return ERR_CAST(sd.bdev); diff --git a/fs/super.c b/fs/super.c index 8563794a8bc462..dc7f328398339d 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1255,17 +1255,13 @@ int get_tree_bdev(struct fs_context *fc, { struct block_device *bdev; struct super_block *s; - fmode_t mode = FMODE_READ; int error = 0; - if (!(fc->sb_flags & SB_RDONLY)) - mode |= FMODE_WRITE; - if (!fc->source) return invalf(fc, "No source specified"); - bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type, - &fs_holder_ops); + bdev = blkdev_get_by_path(fc->source, sb_open_mode(fc->sb_flags), + fc->fs_type, &fs_holder_ops); if (IS_ERR(bdev)) { errorf(fc, "%s: Can't open blockdev", fc->source); return PTR_ERR(bdev); @@ -1344,13 +1340,10 @@ struct dentry *mount_bdev(struct file_system_type *fs_type, { struct block_device *bdev; struct super_block *s; - fmode_t mode = FMODE_READ; int error = 0; - if (!(flags & SB_RDONLY)) - mode |= FMODE_WRITE; - - bdev = blkdev_get_by_path(dev_name, mode, fs_type, &fs_holder_ops); + bdev = blkdev_get_by_path(dev_name, sb_open_mode(flags), fs_type, + &fs_holder_ops); if (IS_ERR(bdev)) return ERR_CAST(bdev); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d5b99796f12c11..97803603902076 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1473,6 +1473,13 @@ struct blk_holder_ops { void (*mark_dead)(struct block_device *bdev); }; +/* + * Return the correct open flags for blkdev_get_by_* for super block flags + * as stored in sb->s_flags. + */ +#define sb_open_mode(flags) \ + (FMODE_READ | (((flags) & SB_RDONLY) ? 0 : FMODE_WRITE)) + struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder, const struct blk_holder_ops *hops); struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,