From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:17481 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933939AbcI1C5k (ORCPT ); Tue, 27 Sep 2016 22:57:40 -0400 Subject: [PATCH 37/63] xfs: cancel CoW reservations and clear inode reflink flag when freeing blocks From: "Darrick J. Wong" Date: Tue, 27 Sep 2016 19:57:35 -0700 Message-ID: <147503145516.30303.8096168526472457811.stgit@birch.djwong.org> In-Reply-To: <147503120985.30303.14151302091684456858.stgit@birch.djwong.org> References: <147503120985.30303.14151302091684456858.stgit@birch.djwong.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org When we're freeing blocks (truncate, punch, etc.), clear all CoW reservations in the range being freed. If the file block count drops to zero, also clear the inode reflink flag. Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_inode.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 0c25a76..8c971fd 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -49,6 +49,7 @@ #include "xfs_trans_priv.h" #include "xfs_log.h" #include "xfs_bmap_btree.h" +#include "xfs_reflink.h" kmem_zone_t *xfs_inode_zone; @@ -1586,6 +1587,18 @@ xfs_itruncate_extents( goto out; } + /* Remove all pending CoW reservations. */ + error = xfs_reflink_cancel_cow_blocks(ip, &tp, first_unmap_block, + last_block); + if (error) + goto out; + + /* + * Clear the reflink flag if we truncated everything. + */ + if (ip->i_d.di_nblocks == 0 && xfs_is_reflink_inode(ip)) + ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; + /* * Always re-log the inode so that our permanent transaction can keep * on rolling it forward in the log.