From patchwork Mon Apr 23 15:00:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amir Goldstein X-Patchwork-Id: 902983 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ext4-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="oqhsV18d"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40V8jg6DWdz9ry1 for ; Tue, 24 Apr 2018 00:58:47 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755440AbeDWO6r (ORCPT ); Mon, 23 Apr 2018 10:58:47 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:33546 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755419AbeDWO6p (ORCPT ); Mon, 23 Apr 2018 10:58:45 -0400 Received: by mail-pf0-f195.google.com with SMTP id f15so9528387pfn.0 for ; Mon, 23 Apr 2018 07:58:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nUkY3RHKqnNjAOVjYnquN/LOlIP2iSESsx+RKUYkAKY=; b=oqhsV18dbKJXLQ8lUCdJTYxT8Mgm/CSzupyAWJGZGAvMnKu9jLOXQXF2XeWK4EY+KV evDIbOSOU9Akd8JoBV/ZUbwQ5mWFqgwjoK2TQoMx/hPgup3tsLaH+Q0LCj/cSo9PuKFX +tfN4b15vcFlKGBNh+3cWXqW/o86VC+rOwBvs8efVcvs4uBATaBisdEY46XsJnEZl82U UBYzdcV/D+IJ3UEaxGa/vcWMNlyrmgOZmmkn5iuU/wQxeqE1lmYUGh8ZFikYBIpW/jMW UDaS3mBhG1qmEhluG1NgPtGC+BygJ9Ae1Xaujz0v+HfBxEwdy4saC7xLw0ORCidrnyPZ VWlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=nUkY3RHKqnNjAOVjYnquN/LOlIP2iSESsx+RKUYkAKY=; b=qIrU+Ud8h5NUb9yTWN+gm95f5Bb7vBwAV5BAb/U6N0RSmSkFB/Z/jCcdD2SBxCDC5W XABUJnwZ3/w63m4qafxS+/6GCLfrzFIQs5tPy5WXCt/PiRxMY7WoFg5nEeHanN7HULtf DzaEZR0HlkygleKBieNPWQIhCYzGNslOHE8aZZBgmxDk7k9TzdIS9b6r6CV/QN/jjCPS R4GR1azEkfT5byUEpQsTdkGLays7vk+Affs86i9OZjvaZMAFPSZfZNSFVDGdn+aNHBFh 3MtoQ4aJjdWuRoGR6+Wuis9/dsPPwnXRGfXgPnISZApzpL3aaVH7+bJFzRHs3kBkpgOI wmtA== X-Gm-Message-State: ALQs6tCfRE5tfaRN2VDabzgjMttS8dqIGjDzx4fFsI5T6Owm5SLP7izp GzrZFSxULvdtDJV/uQTuSYnMgw== X-Google-Smtp-Source: AIpwx48KtoU5zRrxfNO1S2V+qqXQk0fNt4nQxnIenBzSUtxFz8Ym+876UrEKq0g14pTxkWpHQaBH4g== X-Received: by 10.99.116.76 with SMTP id e12mr17217172pgn.270.1524495525450; Mon, 23 Apr 2018 07:58:45 -0700 (PDT) Received: from amir-VirtualBox.event.rightround.com ([198.233.165.212]) by smtp.gmail.com with ESMTPSA id o66sm23873923pfg.90.2018.04.23.07.58.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 23 Apr 2018 07:58:44 -0700 (PDT) From: Amir Goldstein To: Theodore Tso Cc: Jan Kara , linux-ext4@vger.kernel.org Subject: [PATCH v3 1/3] vfs: add the sb_start_intwrite_trylock() helper Date: Mon, 23 Apr 2018 09:00:06 -0600 Message-Id: <1524495608-14086-2-git-send-email-amir73il@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1524495608-14086-1-git-send-email-amir73il@gmail.com> References: <1524495608-14086-1-git-send-email-amir73il@gmail.com> Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Needed by ext4 to test frozen fs before updating s_last_mounted. Reviewed-by: Jan Kara Signed-off-by: Amir Goldstein --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 760d8da1b6c7..cac41f1bad05 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1597,6 +1597,11 @@ static inline void sb_start_intwrite(struct super_block *sb) __sb_start_write(sb, SB_FREEZE_FS, true); } +static inline int sb_start_intwrite_trylock(struct super_block *sb) +{ + return __sb_start_write(sb, SB_FREEZE_FS, false); +} + extern bool inode_owner_or_capable(const struct inode *inode);