6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Darrick J. Wong <djwong@xxxxxxxxxx> [ Upstream commit f7a4874d977bf4202ad575031222e78809a36292 ] If unshare encounters a delalloc reservation in the srcmap, that means that the file range isn't shared because delalloc reservations cannot be reflinked. Therefore, don't try to unshare them. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> Link: https://lore.kernel.org/r/20241002150040.GB21853@frogsfrogsfrogs Reviewed-by: Christoph Hellwig <hch@xxxxxx> Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx> Stable-dep-of: 50793801fc7f ("fsdax: dax_unshare_iter needs to copy entire blocks") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/iomap/buffered-io.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7db9bb0d15184..eb65953895d24 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1282,7 +1282,7 @@ static loff_t iomap_unshare_iter(struct iomap_iter *iter) return length; /* - * Don't bother with holes or unwritten extents. + * Don't bother with delalloc reservations, holes or unwritten extents. * * Note that we use srcmap directly instead of iomap_iter_srcmap as * unsharing requires providing a separate source map, and the presence @@ -1291,6 +1291,7 @@ static loff_t iomap_unshare_iter(struct iomap_iter *iter) * fork for XFS. */ if (iter->srcmap.type == IOMAP_HOLE || + iter->srcmap.type == IOMAP_DELALLOC || iter->srcmap.type == IOMAP_UNWRITTEN) return length; -- 2.43.0
