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xfs: cancel pending CoW reservations when destroying inodes

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When destroying the inode, cancel all pending reservations in the CoW
fork so that all the reserved blocks go back to the free pile.  In
theory this sort of cleanup is only needed to clean up after write
errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2016-10-03 09:11:38 -07:00
parent aa8968f227
commit 5e7e605c4d
1 changed files with 8 additions and 0 deletions
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8
fs/xfs/xfs_super.c
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@ -49,6 +49,7 @@
#include "xfs_rmap_item.h"
#include "xfs_refcount_item.h"
#include "xfs_bmap_item.h"
#include "xfs_reflink.h"
#include <linux/namei.h>
#include <linux/init.h>
@ -938,6 +939,7 @@ xfs_fs_destroy_inode(
struct inode *inode)
{
struct xfs_inode *ip = XFS_I(inode);
int error;
trace_xfs_destroy_inode(ip);
@ -945,6 +947,12 @@ xfs_fs_destroy_inode(
XFS_STATS_INC(ip->i_mount, vn_rele);
XFS_STATS_INC(ip->i_mount, vn_remove);
error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF);
if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount))
xfs_warn(ip->i_mount, "Error %d while evicting CoW blocks "
"for inode %llu.",
error, ip->i_ino);
xfs_inactive(ip);
ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);