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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 C093AC64E7C for ; Tue, 27 Oct 2020 00:41:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A37420760 for ; Tue, 27 Oct 2020 00:41:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603759272; bh=SN9hvYg6Tex/aY6jOySTVpRN/tL+jIbw8znebRkPRf0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=oLUiKYZsjKPI9pLuyQNfGffvzXnX6RZZftNHjn40zL1Aa9GulC6YzhJJSd9OGAu8N dQn5/Z8W9dqtwIBm3YM40wXvRB9ohStocfJyhOK3ZzcOQHBT4Ny2I8h0nNTTkPhfQ9 SyoxcaUyv7wzNYQmUgejOgZ0Sd6fce0s+8UlYjPg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2501965AbgJ0AjG (ORCPT ); Mon, 26 Oct 2020 20:39:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:50770 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409209AbgJZXut (ORCPT ); Mon, 26 Oct 2020 19:50:49 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 66A0E2075B; Mon, 26 Oct 2020 23:50:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756249; bh=SN9hvYg6Tex/aY6jOySTVpRN/tL+jIbw8znebRkPRf0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qHGpvs82XknpisJDoLgeUIICs4Hnz+YXy5498AnXNP83ex8p3Ng6l+i6N17iynVKg oOClDcO8By1lEbNErZNNHtIsegajNejefp2tMGl+5k7XFeIvwlhpNrISDWr9JCHT8p rzU8wSuZnM9HybW5FkGD9qqgw46eT3LiLu0Fd7ro= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Darrick J. Wong" , Christoph Hellwig , Dave Chinner , Sasha Levin , linux-xfs@vger.kernel.org Subject: [PATCH AUTOSEL 5.9 084/147] xfs: don't free rt blocks when we're doing a REMAP bunmapi call Date: Mon, 26 Oct 2020 19:48:02 -0400 Message-Id: <20201026234905.1022767-84-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201026234905.1022767-1-sashal@kernel.org> References: <20201026234905.1022767-1-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: "Darrick J. Wong" [ Upstream commit 8df0fa39bdd86ca81a8d706a6ed9d33cc65ca625 ] When callers pass XFS_BMAPI_REMAP into xfs_bunmapi, they want the extent to be unmapped from the given file fork without the extent being freed. We do this for non-rt files, but we forgot to do this for realtime files. So far this isn't a big deal since nobody makes a bunmapi call to a rt file with the REMAP flag set, but don't leave a logic bomb. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Sasha Levin --- fs/xfs/libxfs/xfs_bmap.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 1b0a01b06a05d..d9a692484eaed 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -5046,20 +5046,25 @@ xfs_bmap_del_extent_real( flags = XFS_ILOG_CORE; if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { - xfs_fsblock_t bno; xfs_filblks_t len; xfs_extlen_t mod; - bno = div_u64_rem(del->br_startblock, mp->m_sb.sb_rextsize, - &mod); - ASSERT(mod == 0); len = div_u64_rem(del->br_blockcount, mp->m_sb.sb_rextsize, &mod); ASSERT(mod == 0); - error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); - if (error) - goto done; + if (!(bflags & XFS_BMAPI_REMAP)) { + xfs_fsblock_t bno; + + bno = div_u64_rem(del->br_startblock, + mp->m_sb.sb_rextsize, &mod); + ASSERT(mod == 0); + + error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); + if (error) + goto done; + } + do_fx = 0; nblks = len * mp->m_sb.sb_rextsize; qfield = XFS_TRANS_DQ_RTBCOUNT; -- 2.25.1