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xfs: extent shifting doesn't fully invalidate page cache

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The extent shifting code uses a flush and invalidate mechainsm prior
to shifting extents around. This is similar to what
xfs_free_file_space() does, but it doesn't take into account things
like page cache vs block size differences, and it will fail if there
is a page that it currently busy.

xfs_flush_unmap_range() handles all of these cases, so just convert
xfs_prepare_shift() to us that mechanism rather than having it's own
special sauce.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner 2018-11-19 13:31:09 -08:00 committed by Darrick J. Wong
parent c08768977b
commit 7f9f71be84
1 changed files with 1 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
fs/xfs/xfs_bmap_util.c
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@ -1195,13 +1195,7 @@ xfs_prepare_shift(
* Writeback and invalidate cache for the remainder of the file as we're
* about to shift down every extent from offset to EOF.
*/
error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, offset, -1);
if (error)
return error;
error = invalidate_inode_pages2_range(VFS_I(ip)->i_mapping,
offset >> PAGE_SHIFT, -1);
if (error)
return error;
error = xfs_flush_unmap_range(ip, offset, XFS_ISIZE(ip));
/*
* Clean out anything hanging around in the cow fork now that