From patchwork Tue Aug 17 02:22:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 12440261 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 787ECC432BE for ; Tue, 17 Aug 2021 02:22:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63F2760551 for ; Tue, 17 Aug 2021 02:22:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236579AbhHQCXC (ORCPT ); Mon, 16 Aug 2021 22:23:02 -0400 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:34369 "EHLO out30-133.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236397AbhHQCW6 (ORCPT ); Mon, 16 Aug 2021 22:22:58 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R681e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04420;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0UjHTKZU_1629166943; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UjHTKZU_1629166943) by smtp.aliyun-inc.com(127.0.0.1); Tue, 17 Aug 2021 10:22:24 +0800 From: Jeffle Xu To: vgoyal@redhat.com, stefanha@redhat.com, miklos@szeredi.hu Cc: linux-fsdevel@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-fs@redhat.com, joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com Subject: [PATCH v4 7/8] fuse: support changing per-file DAX flag inside guest Date: Tue, 17 Aug 2021 10:22:19 +0800 Message-Id: <20210817022220.17574-8-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210817022220.17574-1-jefflexu@linux.alibaba.com> References: <20210817022220.17574-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Fuse client can enable or disable per-file DAX inside kernel/guest by chattr(1). Similarly the new state won't be updated until the file is closed and reopened later. Signed-off-by: Jeffle Xu --- fs/fuse/ioctl.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c index 546ea3d58fb4..a9ed53c5dbd1 100644 --- a/fs/fuse/ioctl.c +++ b/fs/fuse/ioctl.c @@ -469,8 +469,6 @@ int fuse_fileattr_set(struct user_namespace *mnt_userns, if (fa->flags_valid) { err = fuse_priv_ioctl(inode, ff, FS_IOC_SETFLAGS, &flags, sizeof(flags)); - if (err) - goto cleanup; } else { memset(&xfa, 0, sizeof(xfa)); xfa.fsx_xflags = fa->fsx_xflags; @@ -483,6 +481,19 @@ int fuse_fileattr_set(struct user_namespace *mnt_userns, &xfa, sizeof(xfa)); } + if (err) + goto cleanup; + + if (IS_ENABLED(CONFIG_FUSE_DAX)) { + bool newdax; + + if (fa->flags_valid) + newdax = flags & FS_DAX_FL; + else + newdax = fa->fsx_xflags & FS_XFLAG_DAX; + fuse_dax_dontcache(inode, newdax); + } + cleanup: fuse_priv_ioctl_cleanup(inode, ff);