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 X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 220DAC48BE8 for ; Fri, 18 Jun 2021 07:25:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D13E610A2 for ; Fri, 18 Jun 2021 07:25:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233241AbhFRH1Y (ORCPT ); Fri, 18 Jun 2021 03:27:24 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:48354 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232208AbhFRH1X (ORCPT ); Fri, 18 Jun 2021 03:27:23 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 5CB3F1FD8F for ; Fri, 18 Jun 2021 07:25:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1624001114; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/3cktw+uLO5maSZeiU2P36Lf3zXfuxj0uMNgMxK3nw8=; b=ANFFdkZ7o41jmy4B2VRe3yVaQX1BvLNV21nlkAyPS8Gjvo4eYB3Hfs4u+hcb5pv6IdRG42 zDXNz7EhhTe0cRpFqA2IfTvVqYH8FOzw9c3inuGyUdnwOL6nWIMSiq5C9Taa6iDBsOxRZU p3FuP5VCGZVXIQft1JV4vvER4MtFZK8= Received: from adam-pc.lan (unknown [10.163.16.38]) by relay2.suse.de (Postfix) with ESMTP id 70481A3BC7 for ; Fri, 18 Jun 2021 07:25:11 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH v5 06/11] btrfs: reject raid5/6 fs for subpage Date: Fri, 18 Jun 2021 15:24:32 +0800 Message-Id: <20210618072437.207550-7-wqu@suse.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210618072437.207550-1-wqu@suse.com> References: <20210618072437.207550-1-wqu@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Raid5/6 is not only unsafe due to its write-hole problem, but also has tons of hardcoded PAGE_SIZE. So disable it for subpage support for now. Signed-off-by: Qu Wenruo --- fs/btrfs/disk-io.c | 10 ++++++++++ fs/btrfs/volumes.c | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 544bb7a82e57..2af13bb48812 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3417,6 +3417,16 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device goto fail_alloc; } } + if (sectorsize != PAGE_SIZE) { + if (btrfs_super_incompat_flags(fs_info->super_copy) & + BTRFS_FEATURE_INCOMPAT_RAID56) { + btrfs_err(fs_info, + "raid5/6 is not yet supported for sector size %u with page size %lu", + sectorsize, PAGE_SIZE); + err = -EINVAL; + goto fail_alloc; + } + } ret = btrfs_init_workqueues(fs_info, fs_devices); if (ret) { diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 582695cee9d1..1e0829f342f8 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3937,11 +3937,19 @@ static inline int validate_convert_profile(struct btrfs_fs_info *fs_info, if (!(bargs->flags & BTRFS_BALANCE_ARGS_CONVERT)) return true; + if (fs_info->sectorsize < PAGE_SIZE && + bargs->target & BTRFS_BLOCK_GROUP_RAID56_MASK) { + btrfs_err(fs_info, + "RAID5/6 is not supported yet for sectorsize %u with page size %lu", + fs_info->sectorsize, PAGE_SIZE); + goto invalid; + } /* Profile is valid and does not have bits outside of the allowed set */ if (alloc_profile_is_valid(bargs->target, 1) && (bargs->target & ~allowed) == 0) return true; +invalid: btrfs_err(fs_info, "balance: invalid convert %s profile %s", type, btrfs_bg_type_to_raid_name(bargs->target)); return false; -- 2.32.0