From patchwork Thu Jun 8 14:18:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Theodore Ts'o X-Patchwork-Id: 1792335 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org (client-ip=150.107.74.76; helo=gandalf.ozlabs.org; envelope-from=srs0=jl7g=b4=vger.kernel.org=linux-ext4-owner@ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=mit.edu header.i=@mit.edu header.a=rsa-sha256 header.s=outgoing header.b=VAtX3w/s; dkim-atps=neutral Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4QcRC15Pnsz20WP for ; Fri, 9 Jun 2023 00:18:21 +1000 (AEST) Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4QcRC13yd5z4x4B for ; Fri, 9 Jun 2023 00:18:21 +1000 (AEST) Received: by gandalf.ozlabs.org (Postfix) id 4QcRC13vzvz4x3x; Fri, 9 Jun 2023 00:18:21 +1000 (AEST) Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: gandalf.ozlabs.org; dmarc=fail (p=none dis=none) header.from=mit.edu Authentication-Results: gandalf.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-ext4-owner@vger.kernel.org; receiver=) Authentication-Results: gandalf.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=mit.edu header.i=@mit.edu header.a=rsa-sha256 header.s=outgoing header.b=VAtX3w/s; dkim-atps=neutral Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4QcRC114n4z4x4B for ; Fri, 9 Jun 2023 00:18:21 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236594AbjFHOSU (ORCPT ); Thu, 8 Jun 2023 10:18:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236985AbjFHOSU (ORCPT ); Thu, 8 Jun 2023 10:18:20 -0400 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 908342D48 for ; Thu, 8 Jun 2023 07:18:18 -0700 (PDT) Received: from cwcc.thunk.org (pool-173-48-82-39.bstnma.fios.verizon.net [173.48.82.39]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 358EI9RD005448 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 8 Jun 2023 10:18:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mit.edu; s=outgoing; t=1686233891; bh=uy0FNftnFbBcEV9jQmWPf0rxTnbvOJvnEx79Jfl7wEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VAtX3w/sdTX7RQDrLkBFB237n2xQXa/EohBHE5LokZs6rJdD8buS/rSnSCUfABWt1 DGaqYe/Geh7kx/jcXiT1XTuJWsFlPIdNPcpDj8mlLUB0sa7KbpzB927B+ORCXl6o9h mEKxUrJ4kj1aSjnBtahYOSYUCgYEQbNwgK9RZ+gOluEPj2awgZjVA0us1daVFeLqca EasmeJh++moQz+sfTRQDDTVpJIOECVVQu9BFvEehKl2T9fFBNfpiITIxPlQAUMWWHn bRBs9lTghzpvQe7jubDwyWlPiNiTcd/zbxjfmHCLgsmHpA6TN0XCJbH47T6RADFCXA OWPq4zMrT2qtw== Received: by cwcc.thunk.org (Postfix, from userid 15806) id D9AB315C04C4; Thu, 8 Jun 2023 10:18:09 -0400 (EDT) From: "Theodore Ts'o" To: Ext4 Developers List Cc: bagasdotme@gmail.com, nikolas.kraetzschmar@sap.com, jack@suse.cz, "Theodore Ts'o" Subject: [PATCH 2/2] ext4: only check dquot_initialize_needed() when debugging Date: Thu, 8 Jun 2023 10:18:05 -0400 Message-Id: <20230608141805.1434230-2-tytso@mit.edu> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20230608141805.1434230-1-tytso@mit.edu> References: <20230608044056.GA1418535@mit.edu> <20230608141805.1434230-1-tytso@mit.edu> MIME-Version: 1.0 X-Spam-Status: No, score=-4.0 required=5.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org ext4_xattr_block_set() relies on its caller to call dquot_initialize() on the inode. To assure that this has happened there are WARN_ON checks. Unfortunately, this is subject to false positives if there is an antagonist thread which is flipping the file system at high rates between r/o and rw. So only do the check if EXT4_XATTR_DEBUG is enabled. Link: https://lore.kernel.org/r/20230608044056.GA1418535@mit.edu Signed-off-by: Theodore Ts'o --- fs/ext4/xattr.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 13d7f17a9c8c..321e3a888c20 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2056,8 +2056,9 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, else { u32 ref; +#ifdef EXT4_XATTR_DEBUG WARN_ON_ONCE(dquot_initialize_needed(inode)); - +#endif /* The old block is released after updating the inode. */ error = dquot_alloc_block(inode, @@ -2120,8 +2121,9 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, /* We need to allocate a new block */ ext4_fsblk_t goal, block; +#ifdef EXT4_XATTR_DEBUG WARN_ON_ONCE(dquot_initialize_needed(inode)); - +#endif goal = ext4_group_first_block_no(sb, EXT4_I(inode)->i_block_group); block = ext4_new_meta_blocks(handle, inode, goal, 0,