From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hao Xu Subject: [PATCH 09/11] vfs: error out -EAGAIN if atime needs to be updated Date: Sun, 27 Aug 2023 21:28:33 +0800 Message-ID: <20230827132835.1373581-10-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; 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:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=y42FYySYNsis5G3mORomW/nSivl81IaFtk7YSUfz0Jg=; b=HuAEOxXqX67LnBCbKz9mMz1VXr OQP/zSOZ5thHvSxt9FwK908YGFxSNtahLQulgIxVx6hJYH5yDgRCxVN4e8yiexic/GcY7fu+EHXOE epkvDP02seye+i+vbAApwMuPeRNYHGEqPbXse16wn7Wzlw2E4VAaBSisce47EVgVuXE0=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; 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:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=y42FYySYNsis5G3mORomW/nSivl81IaFtk7YSUfz0Jg=; b=aZx88lppqmW3SX7dcZnKqa9yUL 88kJqpYlK/6FVNeNFEGY4x/4+zi+p5Hd/AzpAl3Z45Loc0iY3g4ucw6UdIbuFjx0pvYCxkDQIrBlF ThKdwXJAxLLir7TouEb8ubMLFnv8qDQ0B+6/BPua4tImoFko6msbyKWQWlRXs0PPmb38=; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143308; h=from:from:reply-to:subject:subject: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=y42FYySYNsis5G3mORomW/nSivl81IaFtk7YSUfz0Jg=; b=S4P5Lis+5UgxAXsbIFEQ0bJcfwW5bp3gD+5EV25w4Odl6XRzUJpaJGVaokRckJ9Hpyff0y QCMWQ876jzpmtvZlXQ4fdJDhdeygghENaAwk2aokCERTn3SKcsNlbNr+KPD/7nkWidZUEs LZ/LAlKjzWeA2HQHZTdX8ZHXdvIJ060= In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: io-uring@vger.kernel.org, Jens Axboe Cc: Wanpeng Li , "Darrick J . Wong" , Dominique Martinet , Dave Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stefan Roesch , Clay Harris , linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, codalist@coda.cs.cmu.edu, cluster-devel@redhat.com, linux-cachefs@redhat.com, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-block@vger.kernel.org, Alexander Viro , Christian Brauner , netdev@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, bpf@vger.kernel.o From: Hao Xu To enforce nowait semantics, error out -EAGAIN if atime needs to be updated. Signed-off-by: Hao Xu --- fs/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/inode.c b/fs/inode.c index e83b836f2d09..32d81be65cf9 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -1970,6 +1970,9 @@ int touch_atime(const struct path *path, bool nowait) if (!atime_needs_update(path, inode)) return 0; + if (nowait) + return -EAGAIN; + if (!sb_start_write_trylock(inode->i_sb)) return 0; -- 2.25.1