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From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Date: Sun, 27 Aug 2023 21:28:33 +0800 Message-Id: <20230827132835.1373581-10-hao.xu@linux.dev> In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 X-Mailman-Approved-At: Tue, 29 Aug 2023 08:41:07 +0000 Subject: [Cluster-devel] [PATCH 09/11] vfs: error out -EAGAIN if atime needs to be updated X-BeenThere: cluster-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: "\[Cluster devel\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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.org, Pavel Begunkov , linux-btrfs@vger.kernel.org Errors-To: cluster-devel-bounces@redhat.com Sender: "Cluster-devel" X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="US-ASCII"; x-default=true 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) =09if (!atime_needs_update(path, inode)) =09=09return 0; =20 +=09if (nowait) +=09=09return -EAGAIN; + =09if (!sb_start_write_trylock(inode->i_sb)) =09=09return 0; =20 --=20 2.25.1