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iomap: warn on inline maps in iomap_writepage_map 

And inline mapping should never mark the page dirty and thus never end up
in writepages.  Add a check for that condition and warn if it happens.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-10-17 13:12:17 -07:00 committed by Darrick J. Wong
parent 598ecfbaa7
commit 3e19e6f3ee
1 changed files with 2 additions and 0 deletions
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2
fs/iomap/buffered-io.c
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@ -1415,6 +1415,8 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
error = wpc->ops->map_blocks(wpc, inode, file_offset);
if (error)
break;
if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE))
continue;
if (wpc->iomap.type == IOMAP_HOLE)
continue;
iomap_add_to_ioend(inode, file_offset, page, iop, wpc, wbc,