From patchwork Tue Jul 4 12:56:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 13301184 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 B7BE4EB64DA for ; Tue, 4 Jul 2023 12:57:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231414AbjGDM5G (ORCPT ); Tue, 4 Jul 2023 08:57:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231341AbjGDM5F (ORCPT ); Tue, 4 Jul 2023 08:57:05 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6D6DE70; Tue, 4 Jul 2023 05:57:04 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 91A3722804; Tue, 4 Jul 2023 12:57:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1688475423; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aNFQKK84PQeMU0o2BrZwqCpmBRXyfLB4X6NQO+cVhGk=; b=b464PnUFS3a/2+VaWwFL45DNjCqS5bDW3wdH5p12pEY9dDf1eUx5rHX0kMnhEi4pQPu9OE ISCbSTatRa3SFnE3jXevxH4fWe6G063EsWfB0ab3s81qIxzBNNJZ/VEBi1g/Sl2jCvZEKc aQ1VyHgzQwb/J7WuS67VBftf/8CztAk= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1688475423; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aNFQKK84PQeMU0o2BrZwqCpmBRXyfLB4X6NQO+cVhGk=; b=6sa68DwCV1Y0vXgnLzTEQWJLE3dhaylF7zJF8L+/e3GObWZTxHUedkHQeB5ClMWbTxMPS8 qly98fmlPibnPfBg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 813F213A26; Tue, 4 Jul 2023 12:57:03 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id rRSKHx8XpGREQwAAMHmgww (envelope-from ); Tue, 04 Jul 2023 12:57:03 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id F37E6A0766; Tue, 4 Jul 2023 14:57:02 +0200 (CEST) From: Jan Kara To: Cc: , Christoph Hellwig , Christian Brauner , Jens Axboe , Kees Cook , Ted Tso , syzkaller , Alexander Popov , Eric Biggers , , linux-btrfs@vger.kernel.org, Dmitry Vyukov , Jan Kara Subject: [PATCH 4/6] ext4: Block writes to journal device Date: Tue, 4 Jul 2023 14:56:52 +0200 Message-Id: <20230704125702.23180-4-jack@suse.cz> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230704122727.17096-1-jack@suse.cz> References: <20230704122727.17096-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=782; i=jack@suse.cz; h=from:subject; bh=NWBGOYVyzhEFvSkBdLLt9GRq3HmyHTawgFiLLwCAWLM=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBkpBcU6vLiCKXLfKbqhj0Vfj2Xn+cC+fHAN/x6rTa+ 9bJ+VRmJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCZKQXFAAKCRCcnaoHP2RA2ZVkB/ 9PkYH97s+87SyqxmrXaecUvErsUd5cNv05UrhvfR6NrjkaCwsK432m1QAWSO0oaxJnPAlbCUw9k6X1 CQJ7pNDtVnZg2ycu3WFyFDhR3XKbn1K9qlsgIMcAQVbcpWXXw1otA2PXF2qV5g0TU3jNzE1k6tLMj2 moEkTG41L7PHUj35bfhF27SxRfqy6m5liCh7O0khnw65f3f7YaBffmmCG94eJdHGE/ol+dgFXtaFCa M/0iI7XbnMXLkRoUuoWpyGTSmcXXf/1FR3jkw+VNjdgIjPR7x8Egm+LcZ3XvsLH6q0HmuDgVtD6Kvj DiwdnRXR+LvDOI+TsTk/KHWA9egQ0Y X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Ask block layer to not allow other writers to open block device used for ext4 journal. Signed-off-by: Jan Kara --- fs/ext4/super.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index cbeb8a555fe3..8181285b7549 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1112,8 +1112,9 @@ static struct bdev_handle *ext4_blkdev_get(dev_t dev, struct super_block *sb) { struct bdev_handle *handle; - handle = blkdev_get_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE, sb, - &ext4_holder_ops); + handle = blkdev_get_by_dev(dev, + BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_BLOCK_WRITES, + sb, &ext4_holder_ops); if (IS_ERR(handle)) goto fail; return handle;