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 52A9DC43334 for ; Tue, 7 Jun 2022 18:47:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353721AbiFGSrs (ORCPT ); Tue, 7 Jun 2022 14:47:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352262AbiFGSRA (ORCPT ); Tue, 7 Jun 2022 14:17:00 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B66579397; Tue, 7 Jun 2022 10:51:16 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 16C896170B; Tue, 7 Jun 2022 17:51:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9628CC34119; Tue, 7 Jun 2022 17:51:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1654624275; bh=x31zvOB0b/h3T21ZNGLUMTm+uU569tG9DWKh8rttLcU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BFStR9ifeciWwHVzNrCkKMRjYrPVLlBPch4lAsvxBnLpmaCg6eBfeasGB/eNhw0xi h/Vjx7FgYGOMoFt9EThN2bb35sqB3lLO0mv45cId1/rCFLzj4C4E9UPpTKSuC32NTd nN/zZJlyMxyv8YoO5YZA0C4ppmYo+VFnMv5B4vrNLo966B52UUDrEpNAmU4FMttP/4 jpjGo7w7droOVCnGNLWUEN/9Xx5ilC/+Ppz6tJ9v1jILWaX9s2fgisq2BbB7J2zata NF7hdrv09M9hOF/rpJAyLfrw6LzPoaLl9w8Vx2t9dhfBiWznW3abU3dLdtAaVESDzZ S8fWxZsDOgB2A== 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 5.18 41/68] ceph: allow ceph.dir.rctime xattr to be updatable Date: Tue, 7 Jun 2022 13:48:07 -0400 Message-Id: <20220607174846.477972-41-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220607174846.477972-1-sashal@kernel.org> References: <20220607174846.477972-1-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 afec84088471..8c2dc2c762a4 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