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Commit 897b73b6 authored by Dave Chinner's avatar Dave Chinner Committed by Dave Chinner
Browse files

xfs: zeroing space needs to punch delalloc blocks 



When we are zeroing space andit is covered by a delalloc range, we
need to punch the delalloc range out before we truncate the page
cache. Failing to do so leaves and inconsistency between the page
cache and the extent tree, which we later trip over when doing
direct IO over the same range.

Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
Tested-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent aad3f375

fs/xfs/xfs_bmap_util.c

+12 −1
Original line number Diff line number Diff line
@@ -1418,6 +1418,8 @@ xfs_zero_file_space( 
	xfs_off_t		end_boundary;

	int			error;



	trace_xfs_zero_file_space(ip);



	granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);



	/*
@@ -1432,9 +1434,18 @@ xfs_zero_file_space( 
	ASSERT(end_boundary <= offset + len);



	if (start_boundary < end_boundary - 1) {

		/* punch out the page cache over the conversion range */

		/*

		 * punch out delayed allocation blocks and the page cache over

		 * the conversion range

		 */

		xfs_ilock(ip, XFS_ILOCK_EXCL);

		error = xfs_bmap_punch_delalloc_range(ip,

				XFS_B_TO_FSBT(mp, start_boundary),

				XFS_B_TO_FSB(mp, end_boundary - start_boundary));

		xfs_iunlock(ip, XFS_ILOCK_EXCL);

		truncate_pagecache_range(VFS_I(ip), start_boundary,

					 end_boundary - 1);



		/* convert the blocks */

		error = xfs_alloc_file_space(ip, start_boundary,

					end_boundary - start_boundary - 1,

fs/xfs/xfs_trace.h

+1 −0
Original line number Diff line number Diff line
@@ -603,6 +603,7 @@ DEFINE_INODE_EVENT(xfs_readlink); 
DEFINE_INODE_EVENT(xfs_inactive_symlink);

DEFINE_INODE_EVENT(xfs_alloc_file_space);

DEFINE_INODE_EVENT(xfs_free_file_space);

DEFINE_INODE_EVENT(xfs_zero_file_space);

DEFINE_INODE_EVENT(xfs_collapse_file_space);

DEFINE_INODE_EVENT(xfs_readdir);

#ifdef CONFIG_XFS_POSIX_ACL