From patchwork Tue Dec 3 02:54:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 1203443 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="p/5FgJ48"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47Rmmr1Fbgz9sNx for ; Tue, 3 Dec 2019 13:55:08 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726628AbfLCCzG (ORCPT ); Mon, 2 Dec 2019 21:55:06 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:46573 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726291AbfLCCzF (ORCPT ); Mon, 2 Dec 2019 21:55:05 -0500 Received: by mail-pl1-f196.google.com with SMTP id k20so1030672pll.13 for ; Mon, 02 Dec 2019 18:55:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IF8hGJehe62RZyEGQomk3G52X2m/adfbrRr0tleNlkg=; b=p/5FgJ48ZFhBzLYzeO9F4L3B7m4ViZoWUQR4miaDO9q8W75DIebx34dn5ky65m111W BQbzbKsr3POWha6jTlwe9Pgs7ImCnhVM/0DbEvRcSDnDHiD2f2MjLvOyNfbZz9D4Lo7v QjrPfOdStTkmQzH0cti2SxlxROX9RmmzVrSwGaToJ/1DUakMxPSnZxOrWAfZPHqsYZXJ fXV5ZytEbiv2qvL9So5GAuapJD2J2Zb1acgB1wcaoNevJYO7KCt0ZgYb/9m37jandcz+ hggwRIe78YVn+zXiHOM/eO3JpJajCsjIWRDEKnHgv3Lu6TZevE4iWGiVbRj4e3KOXsrd jlXA== 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:mime-version:content-transfer-encoding; bh=IF8hGJehe62RZyEGQomk3G52X2m/adfbrRr0tleNlkg=; b=DoA+J2MmZyGBnTF+2qG5qEas2L4M8xbtzc3hzI9naFckCpktp+RvopXLWR3um7lUf4 3P8FkODIloCWP9zi0vW2OGteqibhRHrUYiFO5z6enfFzjb5wVgQ4kYRk6zy6uVbNN0Ah 73MbzTV7dz3J1UsgiQYgmC8/u+FnX7cSwmHLVWWr5b4yofPQAdDmxiNAHhXi/ausk5lC BDoebgrYr4u5C1cCvHGRX4gLcGTB+63Kl6uW0RYhNC2NyaRUIm/mC1wBkqrEsN3jl5T4 F7rRM4ZBrYVwkMYuHMqJgCP5gWdP5/Cxau13ozVh5Zhjn6MZRPRODD1YYf8EA3jeYAxM XOvg== X-Gm-Message-State: APjAAAWmKNKmhKM1OLFTN5xJZk5c+EKKarGrKzoK8ns9bnQrsnHH3ATM uQEGMpohlDyZPycp/zx07xhAvQ== X-Google-Smtp-Source: APXvYqyIHYVZf9GRIuCN4OywaBFJKL/aAXS4GlDMkU6KCuqNtTIhV/aw/Ozyre/1uGuacK/Vfqs7mg== X-Received: by 2002:a17:902:bc86:: with SMTP id bb6mr2719674plb.199.1575341704574; Mon, 02 Dec 2019 18:55:04 -0800 (PST) Received: from localhost.localdomain ([66.219.217.79]) by smtp.gmail.com with ESMTPSA id z7sm959364pfk.41.2019.12.02.18.55.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2019 18:55:02 -0800 (PST) From: Jens Axboe To: io-uring@vger.kernel.org Cc: netdev@vger.kernel.org, Jens Axboe Subject: [PATCH 5/5] io_uring: mark us with IORING_FEAT_SUBMIT_STABLE Date: Mon, 2 Dec 2019 19:54:44 -0700 Message-Id: <20191203025444.29344-6-axboe@kernel.dk> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191203025444.29344-1-axboe@kernel.dk> References: <20191203025444.29344-1-axboe@kernel.dk> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org If this flag is set, applications can be certain that any data for async offload has been consumed when the kernel has consumed the SQE. Signed-off-by: Jens Axboe --- fs/io_uring.c | 3 ++- include/uapi/linux/io_uring.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index d5cd338ac8bf..cc3bfa13a1f3 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5063,7 +5063,8 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p) if (ret < 0) goto err; - p->features = IORING_FEAT_SINGLE_MMAP | IORING_FEAT_NODROP; + p->features = IORING_FEAT_SINGLE_MMAP | IORING_FEAT_NODROP | + IORING_FEAT_SUBMIT_STABLE; trace_io_uring_create(ret, ctx, p->sq_entries, p->cq_entries, p->flags); return ret; err: diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 4637ed1d9949..eabccb46edd1 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -157,6 +157,7 @@ struct io_uring_params { */ #define IORING_FEAT_SINGLE_MMAP (1U << 0) #define IORING_FEAT_NODROP (1U << 1) +#define IORING_FEAT_SUBMIT_STABLE (1U << 2) /* * io_uring_register(2) opcodes and arguments