From patchwork Thu Jun 8 11:02:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13272087 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 882B6C87FDD for ; Thu, 8 Jun 2023 11:07:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236522AbjFHLH0 (ORCPT ); Thu, 8 Jun 2023 07:07:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236357AbjFHLGV (ORCPT ); Thu, 8 Jun 2023 07:06:21 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46B203AA2; Thu, 8 Jun 2023 04:04:47 -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=cT8NDVtiIsZNzV7dqaCyqaAv6UgEz/7VfiIdR+IkQQM=; b=kiJFIQ1nAL+TXJv9FL1MxdQxRn MjE37b6TUrn3o2T+X8RTjzxc9dFoJwc13B1cxCTfAgHHieEEThz+nOulB+CXAbbC1Y0y85FoWFx1G VraKXIbJAMCy3hW0e3Z3ki4QwJEvq9BK9L16/RF4/o2PenRIOj00eETs5fBt1PFSS9iM3+erOXzTk Zaq0wNsryRPVn+c0ll3/+zPoyHsu/DIq1VB+b/aXjSerkeOYW0iTLL8nU8Au3EkY8EtDDZIBLMWmS WhjQhMLxjLCE3gWrcxXeubo/4FAPO6sinlscv6PM4NW47r2uUyAy4fyteW4jDGY1V2cNPUKALpg8d C5CDVyMw==; 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 1q7DRI-0092xn-1H; Thu, 08 Jun 2023 11:04:24 +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 29/30] block: store the holder in file->private_data Date: Thu, 8 Jun 2023 13:02:57 +0200 Message-Id: <20230608110258.189493-30-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230608110258.189493-1-hch@lst.de> References: <20230608110258.189493-1-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-btrfs@vger.kernel.org Store the file struct used as the holder in file->private_data as an indicator that this file descriptor was opened exclusively to remove the last use of FMODE_EXCL. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- block/fops.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/block/fops.c b/block/fops.c index 0d714d050a462c..9871bd6052b416 100644 --- a/block/fops.c +++ b/block/fops.c @@ -478,7 +478,7 @@ blk_mode_t file_to_blk_mode(struct file *file) mode |= BLK_OPEN_READ; if (file->f_mode & FMODE_WRITE) mode |= BLK_OPEN_WRITE; - if (file->f_mode & FMODE_EXCL) + if (file->private_data) mode |= BLK_OPEN_EXCL; if (file->f_flags & O_NDELAY) mode |= BLK_OPEN_NDELAY; @@ -507,12 +507,15 @@ static int blkdev_open(struct inode *inode, struct file *filp) filp->f_flags |= O_LARGEFILE; filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC; + /* + * Use the file private data to store the holder for exclusive openes. + * file_to_blk_mode relies on it being present to set BLK_OPEN_EXCL. + */ if (filp->f_flags & O_EXCL) - filp->f_mode |= FMODE_EXCL; + filp->private_data = filp; bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp), - (filp->f_mode & FMODE_EXCL) ? filp : NULL, - NULL); + filp->private_data, NULL); if (IS_ERR(bdev)) return PTR_ERR(bdev); @@ -523,8 +526,7 @@ static int blkdev_open(struct inode *inode, struct file *filp) static int blkdev_release(struct inode *inode, struct file *filp) { - blkdev_put(I_BDEV(filp->f_mapping->host), - (filp->f_mode & FMODE_EXCL) ? filp : NULL); + blkdev_put(I_BDEV(filp->f_mapping->host), filp->private_data); return 0; }