From patchwork Tue Jun 6 07:39:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 690808 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 D37A8C7EE39 for ; Tue, 6 Jun 2023 07:40:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236398AbjFFHke (ORCPT ); Tue, 6 Jun 2023 03:40:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236352AbjFFHkQ (ORCPT ); Tue, 6 Jun 2023 03:40:16 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8575E71; Tue, 6 Jun 2023 00:40:13 -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=4vTkM88Q4vOnIk7RWnBk9kClYM+gvOSK7rFbMW2koP8=; b=5ACdkWotRkuDFBRw87bd6nNyHq a7JoDFw7N7Ed/402wPqJm7BAmrrRW/JGvfgGzU6ZI2AolGVvEU7NkgEl9WBhlEIRMwwadLXs8tZOU NlPbUO+piRKgmN5M6UbQTLdhhsm3a72chXondveYppINAZ0gHY7ypryuh7wkV0cmwEUNzuMKYcJY1 yMZc3hE4miIftWCP1tDZkvC5MRESoJWMwAV92vqScIhKd6Zd96+K1QZsHr9xCCLs0aokaRBas+7XO T5O6p0T5uU4EcucL+8esF/hg4YmfKROthLTTvxdpLH1pw6xzSZtu5/us9C9NFv6v+2sCd+HFwK2oQ LfjNKiFg==; 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 1q6RIK-000YaI-16; Tue, 06 Jun 2023 07:39:56 +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 01/31] block: also call ->open for incremental partition opens Date: Tue, 6 Jun 2023 09:39:20 +0200 Message-Id: <20230606073950.225178-2-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-pm@vger.kernel.org For whole devices ->open is called for each open, but for partitions it is only called on the first open of a partition. This is problematic as various block drivers look at open flags and might not do all setup for ioctl only or NDELAY opens. Signed-off-by: Christoph Hellwig --- block/bdev.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index 5c46ff10770638..981f6135795138 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -683,9 +683,6 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode) struct gendisk *disk = part->bd_disk; int ret; - if (atomic_read(&part->bd_openers)) - goto done; - ret = blkdev_get_whole(bdev_whole(part), mode); if (ret) return ret; @@ -694,9 +691,10 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode) if (!bdev_nr_sectors(part)) goto out_blkdev_put; - disk->open_partitions++; - set_init_blocksize(part); -done: + if (!atomic_read(&part->bd_openers)) { + disk->open_partitions++; + set_init_blocksize(part); + } atomic_inc(&part->bd_openers); return 0; @@ -709,10 +707,10 @@ static void blkdev_put_part(struct block_device *part, fmode_t mode) { struct block_device *whole = bdev_whole(part); - if (!atomic_dec_and_test(&part->bd_openers)) - return; - blkdev_flush_mapping(part); - whole->bd_disk->open_partitions--; + if (atomic_dec_and_test(&part->bd_openers)) { + blkdev_flush_mapping(part); + whole->bd_disk->open_partitions--; + } blkdev_put_whole(whole, mode); }