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 6856CCCA47E for ; Tue, 7 Jun 2022 19:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356929AbiFGTkX (ORCPT ); Tue, 7 Jun 2022 15:40:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354447AbiFGSrC (ORCPT ); Tue, 7 Jun 2022 14:47:02 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F2DA51E48; Tue, 7 Jun 2022 11:01:17 -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 ams.source.kernel.org (Postfix) with ESMTPS id BC60CB82374; Tue, 7 Jun 2022 18:01:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88B97C341C4; Tue, 7 Jun 2022 18:01:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1654624874; bh=hMR4mJxRTbcnFioLYn9YBF9bnoQ3ApVCooUwafH/D54=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F4V/UA+oiV7p+ne/WapAU3ZslLjVRIQGr8SPvnE13yUGjWls/VF726ce5/GtcxjOL vtvi6LxM3AQbeJUAGtdvqLVR8F+MX6XqWM7j9uie2JJc6HTNHS2Mg+hgu56mTGrPtU haY7jbx6BGEHeJI1YdpDXuhcxJfVnyN68O7yY1lZ9yCFwMExARyc3kww+F+jj5jmwb RE+XaM4T5Rz80KOb+R5E6Ws/cVGqKX7v/3ZgEZY3xyAP2n1k1oB//wGzkq7LXsQ+dY DTWjsX/7sZtfCF7fWXTPKVZHqKOgG6zYtqqxJyJhjKSHLbjZGWQ1ASY1dTHqYIJHJ0 9gZEb6zf+H6xQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Venky Shankar , Xiubo Li , Ilya Dryomov , Sasha Levin , ceph-devel@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 25/34] ceph: allow ceph.dir.rctime xattr to be updatable Date: Tue, 7 Jun 2022 14:00:00 -0400 Message-Id: <20220607180011.481266-25-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220607180011.481266-1-sashal@kernel.org> References: <20220607180011.481266-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 cb18ee637cb7..4bcf0226818d 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -316,6 +316,14 @@ static ssize_t ceph_vxattrcb_snap_btime(struct ceph_inode_info *ci, char *val, } #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), \ @@ -353,7 +361,7 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = { XATTR_RSTAT_FIELD(dir, rfiles), XATTR_RSTAT_FIELD(dir, rsubdirs), 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