From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <io-uring-owner@kernel.org>
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 87810C433FE
for <io-uring@archiver.kernel.org>; Thu, 26 May 2022 17:39:13 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
id S1343972AbiEZRjL (ORCPT <rfc822;io-uring@archiver.kernel.org>);
Thu, 26 May 2022 13:39:11 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59778 "EHLO
lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
with ESMTP id S239419AbiEZRjI (ORCPT
<rfc822;io-uring@vger.kernel.org>); Thu, 26 May 2022 13:39:08 -0400
Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30])
by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0299994D1
for <io-uring@vger.kernel.org>; Thu, 26 May 2022 10:39:05 -0700 (PDT)
Received: from pps.filterd (m0001303.ppops.net [127.0.0.1])
by m0001303.ppops.net (8.17.1.5/8.17.1.5) with ESMTP id 24QF3hSD012028
for <io-uring@vger.kernel.org>; Thu, 26 May 2022 10:39:05 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject
: date : message-id : in-reply-to : references : mime-version :
content-transfer-encoding : content-type; s=facebook;
bh=CHkVmanun6GHuUP4Cg6nbmQ2wQHDke+Cbgl3CRSd104=;
b=HF8SUG8KP44A//ltyEBb1Twa4WG7C7D+d7U6W3YEHmRiHfqa5f6TKbeAE+pH2A9AJg7X
sotUKP85d6hERENJMfUp9e/m/Z+8RcJqb6h23iKf7sHK/k/INs6DWflOQquA9CZ8GUGO
16PorU0AKE0AUP+gxcM3CWt0gKYBPsftU/Y=
Received: from maileast.thefacebook.com ([163.114.130.16])
by m0001303.ppops.net (PPS) with ESMTPS id 3g9qtug2fy-11
(version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT)
for <io-uring@vger.kernel.org>; Thu, 26 May 2022 10:39:04 -0700
Received: from twshared19572.14.frc2.facebook.com (2620:10d:c0a8:1b::d) by
mail.thefacebook.com (2620:10d:c0a8:83::6) with Microsoft SMTP Server
(version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
15.1.2375.28; Thu, 26 May 2022 10:39:01 -0700
Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415)
id 80733FA621D8; Thu, 26 May 2022 10:38:45 -0700 (PDT)
From: Stefan Roesch <shr@fb.com>
To: <io-uring@vger.kernel.org>, <kernel-team@fb.com>,
<linux-mm@kvack.org>, <linux-xfs@vger.kernel.org>,
<linux-fsdevel@vger.kernel.org>
CC: <shr@fb.com>, <david@fromorbit.com>, <jack@suse.cz>,
<hch@infradead.org>
Subject: [PATCH v6 06/16] fs: Add check for async buffered writes to generic_write_checks
Date: Thu, 26 May 2022 10:38:30 -0700
Message-ID: <20220526173840.578265-7-shr@fb.com>
X-Mailer: git-send-email 2.30.2
In-Reply-To: <20220526173840.578265-1-shr@fb.com>
References: <20220526173840.578265-1-shr@fb.com>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
X-FB-Internal: Safe
Content-Type: text/plain
X-Proofpoint-GUID: YdGbB8tm5kWfz6hsquop1zKaT9SfWe-c
X-Proofpoint-ORIG-GUID: YdGbB8tm5kWfz6hsquop1zKaT9SfWe-c
X-Proofpoint-Virus-Version: vendor=baseguard
engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514
definitions=2022-05-26_09,2022-05-25_02,2022-02-23_01
Precedence: bulk
List-ID: <io-uring.vger.kernel.org>
X-Mailing-List: io-uring@vger.kernel.org
This introduces the flag FMODE_BUF_WASYNC. If devices support async
buffered writes, this flag can be set. It also modifies the check in
generic_write_checks to take async buffered writes into consideration.
Signed-off-by: Stefan Roesch <shr@fb.com>
---
fs/read_write.c | 4 +++-
include/linux/fs.h | 3 +++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index e643aec2b0ef..175d98713b9a 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1633,7 +1633,9 @@ int generic_write_checks_count(struct kiocb *iocb, =
loff_t *count)
if (iocb->ki_flags & IOCB_APPEND)
iocb->ki_pos =3D i_size_read(inode);
=20
- if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
+ if ((iocb->ki_flags & IOCB_NOWAIT) &&
+ !((iocb->ki_flags & IOCB_DIRECT) ||
+ (file->f_mode & FMODE_BUF_WASYNC)))
return -EINVAL;
=20
return generic_write_check_limits(iocb->ki_filp, iocb->ki_pos, count);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 87b5af1d9fbe..407ad5004f54 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -177,6 +177,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t=
offset,
/* File supports async buffered reads */
#define FMODE_BUF_RASYNC ((__force fmode_t)0x40000000)
=20
+/* File supports async nowait buffered writes */
+#define FMODE_BUF_WASYNC ((__force fmode_t)0x80000000)
+
/*
* Attribute flags. These should be or-ed together to figure out what
* has been changed!
--=20
2.30.2