[PATCH 10/12] iomap: warn on inline maps in iomap_writepage_map

From: Christoph Hellwig
Date: Tue Oct 15 2019 - 11:44:38 EST


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@xxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/iomap/buffered-io.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 00af08006cd3..76e72576f307 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1421,6 +1421,8 @@ 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,
--
2.20.1