From mboxrd@z Thu Jan 1 00:00:00 1970 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 3F1C5CCA47C for ; Mon, 13 Jun 2022 13:21:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376420AbiFMNVn (ORCPT ); Mon, 13 Jun 2022 09:21:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376444AbiFMNSs (ORCPT ); Mon, 13 Jun 2022 09:18:48 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5A36111F; Mon, 13 Jun 2022 04:22:39 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 99C26CE1171; Mon, 13 Jun 2022 11:22:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0995C34114; Mon, 13 Jun 2022 11:22:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655119328; bh=ePu/TFxZhlL/47ffI9miQGre6cc/+lefNGf4A6NqDWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hiw2FujJNLg/XnSyXEQCLI4uubeNCeYE5nXiXpzxaVgkPKrDBE48hEn804g48UsfN D8+WU9zbc+8YXr3xWU5lqy1/z0xYwUaj9oYw4qUCcqLU8nytPlAvcDIrLFldfxSjKC ZrF7rYvqlz0fZ66Wq51XvrAiJJ9Ec/eV3S3+aQ1Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Venky Shankar , Xiubo Li , Ilya Dryomov , Sasha Levin Subject: [PATCH 5.15 196/247] ceph: allow ceph.dir.rctime xattr to be updatable Date: Mon, 13 Jun 2022 12:11:38 +0200 Message-Id: <20220613094928.894435193@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094922.843438024@linuxfoundation.org> References: <20220613094922.843438024@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Venky Shankar [ Upstream commit d7a2dc523085f8b8c60548ceedc696934aefeb0e ] `rctime' has been a pain point in cephfs due to its buggy nature - inconsistent values reported and those sorts. Fixing rctime is non-trivial needing an overall redesign of the entire nested statistics infrastructure. As a workaround, PR http://github.com/ceph/ceph/pull/37938 allows this extended attribute to be manually set. This allows users to "fixup" inconsistent rctime values. While this sounds messy, its probably the wisest approach allowing users/scripts to workaround buggy rctime values. The above PR enables Ceph MDS to allow manually setting rctime extended attribute with the corresponding user-land changes. We may as well allow the same to be done via kclient for parity. Signed-off-by: Venky Shankar Reviewed-by: Xiubo Li Signed-off-by: Ilya Dryomov Signed-off-by: Sasha Levin --- fs/ceph/xattr.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 159a1ffa4f4b..db288b4aee6d 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -366,6 +366,14 @@ static ssize_t ceph_vxattrcb_auth_mds(struct ceph_inode_info *ci, } #define XATTR_RSTAT_FIELD(_type, _name) \ XATTR_NAME_CEPH(_type, _name, VXATTR_FLAG_RSTAT) +#define XATTR_RSTAT_FIELD_UPDATABLE(_type, _name) \ + { \ + .name = CEPH_XATTR_NAME(_type, _name), \ + .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ + .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ + .exists_cb = NULL, \ + .flags = VXATTR_FLAG_RSTAT, \ + } #define XATTR_LAYOUT_FIELD(_type, _name, _field) \ { \ .name = CEPH_XATTR_NAME2(_type, _name, _field), \ @@ -404,7 +412,7 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = { XATTR_RSTAT_FIELD(dir, rsubdirs), XATTR_RSTAT_FIELD(dir, rsnaps), XATTR_RSTAT_FIELD(dir, rbytes), - XATTR_RSTAT_FIELD(dir, rctime), + XATTR_RSTAT_FIELD_UPDATABLE(dir, rctime), { .name = "ceph.dir.pin", .name_size = sizeof("ceph.dir.pin"), -- 2.35.1