[11/14] iomap: warn on inline maps in iomap_writepage_map
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Message ID 20191017175624.30305-12-hch@lst.de
State New
Headers show
  • [01/14] iomap: iomap that extends beyond EOF should be marked dirty
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Commit Message

Christoph Hellwig Oct. 17, 2019, 5:56 p.m. UTC
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>
 fs/iomap/buffered-io.c | 2 ++
 1 file changed, 2 insertions(+)

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diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index a8db706d59cb..7b83a7ba2edb 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1415,6 +1415,8 @@  iomap_writepage_map(struct iomap_writepage_ctx *wpc,
 		error = wpc->ops->map_blocks(wpc, inode, file_offset);
 		if (error)
+		if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE))
+			continue;
 		if (wpc->iomap.type == IOMAP_HOLE)
 		iomap_add_to_ioend(inode, file_offset, page, iop, wpc, wbc,