From patchwork Tue Nov 2 05:26:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 12597837 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 57C20C433F5 for ; Tue, 2 Nov 2021 05:26:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3640061051 for ; Tue, 2 Nov 2021 05:26:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229699AbhKBF2p (ORCPT ); Tue, 2 Nov 2021 01:28:45 -0400 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:37827 "EHLO out30-133.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229510AbhKBF2m (ORCPT ); Tue, 2 Nov 2021 01:28:42 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0UuhHU.o_1635830765; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UuhHU.o_1635830765) by smtp.aliyun-inc.com(127.0.0.1); Tue, 02 Nov 2021 13:26:06 +0800 From: Jeffle Xu To: vgoyal@redhat.com, stefanha@redhat.com, miklos@szeredi.hu Cc: virtio-fs@redhat.com, linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com Subject: [PATCH v7 3/7] fuse: support per inode DAX in fuse protocol Date: Tue, 2 Nov 2021 13:26:00 +0800 Message-Id: <20211102052604.59462-4-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211102052604.59462-1-jefflexu@linux.alibaba.com> References: <20211102052604.59462-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Expand the fuse protocol to support per inode DAX. FUSE_HAS_INODE_DAX flag is added indicating if fuse server/client supporting per inode DAX. It can be conveyed in both FUSE_INIT request and reply. FUSE_ATTR_DAX flag is added indicating if DAX shall be enabled for corresponding file. It is conveyed in FUSE_LOOKUP reply. Signed-off-by: Jeffle Xu --- include/uapi/linux/fuse.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 36ed092227fa..4ebe06091988 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -184,6 +184,9 @@ * * 7.34 * - add FUSE_SYNCFS + * + * 7.35 + * - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX */ #ifndef _LINUX_FUSE_H @@ -219,7 +222,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 34 +#define FUSE_KERNEL_MINOR_VERSION 35 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -336,6 +339,7 @@ struct fuse_file_lock { * write/truncate sgid is killed only if file has group * execute permission. (Same as Linux VFS behavior). * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in + * FUSE_HAS_INODE_DAX: use per inode DAX */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -367,6 +371,7 @@ struct fuse_file_lock { #define FUSE_SUBMOUNTS (1 << 27) #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) #define FUSE_SETXATTR_EXT (1 << 29) +#define FUSE_HAS_INODE_DAX (1 << 30) /** * CUSE INIT request/reply flags @@ -449,8 +454,10 @@ struct fuse_file_lock { * fuse_attr flags * * FUSE_ATTR_SUBMOUNT: Object is a submount root + * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode */ #define FUSE_ATTR_SUBMOUNT (1 << 0) +#define FUSE_ATTR_DAX (1 << 1) /** * Open flags