From patchwork Fri Sep 22 16:09:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13395996 Return-Path: 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 5A622CD4841 for ; Fri, 22 Sep 2023 16:11:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229572AbjIVQLn (ORCPT ); Fri, 22 Sep 2023 12:11:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231648AbjIVQLl (ORCPT ); Fri, 22 Sep 2023 12:11:41 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9E71139 for ; Fri, 22 Sep 2023 09:10:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1695399055; 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=od1mr+TbfZ9kgpeg8F1L9x1V0zrtt9NqVUngA0b92C0=; b=f+vSORTetuAglC6lAnJbhdlIFoJPWZ0YaPCRd9EJbUeeKpZQFmwssqs4JUSLwD/2yL2qk4 K8+UvLI/LwV9W8vbhWym4sTIFnJWHv6sP2h1NaLbLUwFyVr0vTSDCTYrwi9MqG3OgO5xZM Jr5LCsZe2uZedzW5q2u2HVupOtWviBA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-628-Hs31LXcHPa6XnIH7wFXn7g-1; Fri, 22 Sep 2023 12:10:54 -0400 X-MC-Unique: Hs31LXcHPa6XnIH7wFXn7g-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 006FF185A790; Fri, 22 Sep 2023 16:10:54 +0000 (UTC) Received: from localhost (unknown [10.72.120.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2CC6E711282; Fri, 22 Sep 2023 16:10:52 +0000 (UTC) From: Ming Lei To: Jens Axboe , io-uring@vger.kernel.org, linux-block@vger.kernel.org Cc: Gabriel Krisman Bertazi , Ming Lei Subject: [PATCH V3 1/2] io_uring: retain top 8bits of uring_cmd flags for kernel internal use Date: Sat, 23 Sep 2023 00:09:40 +0800 Message-ID: <20230922160943.2793779-2-ming.lei@redhat.com> In-Reply-To: <20230922160943.2793779-1-ming.lei@redhat.com> References: <20230922160943.2793779-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Retain top 8bits of uring_cmd flags for kernel internal use, so that we can move IORING_URING_CMD_POLLED out of uapi header. Signed-off-by: Ming Lei --- include/linux/io_uring.h | 3 +++ include/uapi/linux/io_uring.h | 5 ++--- io_uring/uring_cmd.c | 2 +- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h index 106cdc55ff3b..ae08d6f66e62 100644 --- a/include/linux/io_uring.h +++ b/include/linux/io_uring.h @@ -22,6 +22,9 @@ enum io_uring_cmd_flags { IO_URING_F_IOPOLL = (1 << 10), }; +/* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */ +#define IORING_URING_CMD_POLLED (1U << 31) + struct io_uring_cmd { struct file *file; const struct io_uring_sqe *sqe; diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 8e61f8b7c2ce..4df2f11f264f 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -246,13 +246,12 @@ enum io_uring_op { }; /* - * sqe->uring_cmd_flags + * sqe->uring_cmd_flags top 8bits aren't available for userspace * IORING_URING_CMD_FIXED use registered buffer; pass this flag * along with setting sqe->buf_index. - * IORING_URING_CMD_POLLED driver use only */ #define IORING_URING_CMD_FIXED (1U << 0) -#define IORING_URING_CMD_POLLED (1U << 31) +#define IORING_URING_CMD_MASK 0x00ffffffU /* diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 537795fddc87..52a455b67163 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -90,7 +90,7 @@ int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (sqe->__pad1) return -EINVAL; - ioucmd->flags = READ_ONCE(sqe->uring_cmd_flags); + ioucmd->flags = READ_ONCE(sqe->uring_cmd_flags) & IORING_URING_CMD_MASK; if (ioucmd->flags & ~IORING_URING_CMD_FIXED) return -EINVAL;