From patchwork Mon Nov 16 14:58:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11909477 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 8DFB3175A for ; Mon, 16 Nov 2020 15:11:08 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5622724170 for ; Mon, 16 Nov 2020 15:11:08 +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="sSbJyd5Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5622724170 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.28085.56810 (Exim 4.92) (envelope-from ) id 1keg8a-0001CO-R8; Mon, 16 Nov 2020 15:09:48 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 28085.56810; Mon, 16 Nov 2020 15:09:48 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1keg8a-0001Bd-59; Mon, 16 Nov 2020 15:09:48 +0000 Received: by outflank-mailman (input) for mailman id 28085; Mon, 16 Nov 2020 15:09:42 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1keg4W-0006ni-EB for xen-devel@lists.xenproject.org; Mon, 16 Nov 2020 15:05:36 +0000 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4c6f1ef5-7ea4-42e8-af8d-bfb879892df4; Mon, 16 Nov 2020 15:00:14 +0000 (UTC) Received: from [2001:4bb8:180:6600:255b:7def:a93:4a09] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kefz7-0004KI-Jc; Mon, 16 Nov 2020 15:00:02 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1keg4W-0006ni-EB for xen-devel@lists.xenproject.org; Mon, 16 Nov 2020 15:05:36 +0000 X-Inumbo-ID: 4c6f1ef5-7ea4-42e8-af8d-bfb879892df4 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4c6f1ef5-7ea4-42e8-af8d-bfb879892df4; Mon, 16 Nov 2020 15:00:14 +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=YfjTrndpak8c8C7A2Wr6OEv1ltyYeLktzUiwQ2pu+CA=; b=sSbJyd5Z5KD2Jm06fbaragik+M U4XXVDpuxMNv4/WjvlIpVZ5hUtJVUjJwX0o6moSI38FP1aoBNjPnqu8o8kZG9K4b+WNesnRErmT0w c6uY7DfOfd9C5ydCEyUMR677DxoiIxYLRbGGQfJ2J5j6waIzphSYMTKUR+nE58YtYY8s0sKyBH3Ag gi1DVUl5tW1CH54AIrFJbhR7wa+qgoeCULdOKd8s1qQnapCkGCpIt0k3E1/tTPjMNE85mVQKwftyC EQD17+/p3VVrTmL/7uawHNQSIdYnwo33SsrBvTjwr6J9LQP9HpQU2Rf1rToCbxKxVr+U/txNCS6he amu9O3qQ==; Received: from [2001:4bb8:180:6600:255b:7def:a93:4a09] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kefz7-0004KI-Jc; Mon, 16 Nov 2020 15:00:02 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Justin Sanders , Josef Bacik , Ilya Dryomov , Jack Wang , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Konrad Rzeszutek Wilk , =?utf-8?q?Roger_Pau_Monn?= =?utf-8?q?=C3=A9?= , Minchan Kim , Mike Snitzer , Song Liu , "Martin K. Petersen" , dm-devel@redhat.com, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 77/78] fs: simplify the get_super_thawed interface Date: Mon, 16 Nov 2020 15:58:08 +0100 Message-Id: <20201116145809.410558-78-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201116145809.410558-1-hch@lst.de> References: <20201116145809.410558-1-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 Merge get_super_thawed and get_super_exclusive_thawed into a single function. Signed-off-by: Christoph Hellwig --- fs/quota/quota.c | 4 ++-- fs/super.c | 42 +++++++++++------------------------------- include/linux/fs.h | 3 +-- 3 files changed, 14 insertions(+), 35 deletions(-) diff --git a/fs/quota/quota.c b/fs/quota/quota.c index 9af95c7a0bbe3c..21d43933213965 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -876,9 +876,9 @@ static struct super_block *quotactl_block(const char __user *special, int cmd) if (IS_ERR(bdev)) return ERR_CAST(bdev); if (quotactl_cmd_onoff(cmd)) - sb = get_super_exclusive_thawed(bdev); + sb = get_super_thawed(bdev, true); else if (quotactl_cmd_write(cmd)) - sb = get_super_thawed(bdev); + sb = get_super_thawed(bdev, false); else sb = get_super(bdev); bdput(bdev); diff --git a/fs/super.c b/fs/super.c index b327a82bc1946b..50995f8abd1bf1 100644 --- a/fs/super.c +++ b/fs/super.c @@ -789,8 +789,17 @@ struct super_block *get_super(struct block_device *bdev) } EXPORT_SYMBOL(get_super); -static struct super_block *__get_super_thawed(struct block_device *bdev, - bool excl) +/** + * get_super_thawed - get thawed superblock of a device + * @bdev: device to get the superblock for + * @excl: lock s_umount exclusive if %true, else shared. + * + * Scans the superblock list and finds the superblock of the file system mounted + * on the device. The superblock is returned with s_umount held once it is + * thawed (or immediately if it was not frozen), or %NULL if no superblock was + * found. + */ +struct super_block *get_super_thawed(struct block_device *bdev, bool excl) { while (1) { struct super_block *s = __get_super(bdev, excl); @@ -805,37 +814,8 @@ static struct super_block *__get_super_thawed(struct block_device *bdev, put_super(s); } } - -/** - * get_super_thawed - get thawed superblock of a device - * @bdev: device to get the superblock for - * - * Scans the superblock list and finds the superblock of the file system - * mounted on the device. The superblock is returned once it is thawed - * (or immediately if it was not frozen). %NULL is returned if no match - * is found. - */ -struct super_block *get_super_thawed(struct block_device *bdev) -{ - return __get_super_thawed(bdev, false); -} EXPORT_SYMBOL(get_super_thawed); -/** - * get_super_exclusive_thawed - get thawed superblock of a device - * @bdev: device to get the superblock for - * - * Scans the superblock list and finds the superblock of the file system - * mounted on the device. The superblock is returned once it is thawed - * (or immediately if it was not frozen) and s_umount semaphore is held - * in exclusive mode. %NULL is returned if no match is found. - */ -struct super_block *get_super_exclusive_thawed(struct block_device *bdev) -{ - return __get_super_thawed(bdev, true); -} -EXPORT_SYMBOL(get_super_exclusive_thawed); - /** * get_active_super - get an active reference to the superblock of a device * @bdev: device to get the superblock for diff --git a/include/linux/fs.h b/include/linux/fs.h index 8667d0cdc71e76..d026d177a526bf 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3132,8 +3132,7 @@ extern struct file_system_type *get_filesystem(struct file_system_type *fs); extern void put_filesystem(struct file_system_type *fs); extern struct file_system_type *get_fs_type(const char *name); extern struct super_block *get_super(struct block_device *); -extern struct super_block *get_super_thawed(struct block_device *); -extern struct super_block *get_super_exclusive_thawed(struct block_device *bdev); +struct super_block *get_super_thawed(struct block_device *bdev, bool excl); extern struct super_block *get_active_super(struct block_device *bdev); extern void drop_super(struct super_block *sb); extern void drop_super_exclusive(struct super_block *sb);