[PATCH v4 4/5] fuse: hook into iomap for invalidating and checking partial uptodateness

[Joanne Koong <joannelkoong@gmail.com>]

Hook into iomap_invalidate_folio() so that if the entire folio is being
invalidated during truncation, the dirty state is cleared and the folio
doesn't get written back. As well the folio's corresponding ifs struct
will get freed.

Hook into iomap_is_partially_uptodate() since iomap tracks uptodateness
granularly when it does buffered writes.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
---
 fs/fuse/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d7ee03fdccee..669789043a8e 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3103,6 +3103,8 @@ static const struct address_space_operations fuse_file_aops  = {
 	.launder_folio	= fuse_launder_folio,
 	.dirty_folio	= iomap_dirty_folio,
 	.release_folio	= iomap_release_folio,
+	.invalidate_folio = iomap_invalidate_folio,
+	.is_partially_uptodate = iomap_is_partially_uptodate,
 	.migrate_folio	= filemap_migrate_folio,
 	.bmap		= fuse_bmap,
 	.direct_IO	= fuse_direct_IO,
-- 
2.47.1