mm: Fix filemap_invalidate_inode() to use invalidate_inode_pages2_ran…

…ge()

commit c26096e upstream.

Fix filemap_invalidate_inode() to use invalidate_inode_pages2_range()
rather than truncate_inode_pages_range().  The latter clears the
invalidated bit of a partial pages rather than discarding it entirely.
This causes copy_file_range() to fail on cifs because the partial pages at
either end of the destination range aren't evicted and reread, but rather
just partly cleared.

This causes generic/075 and generic/112 xfstests to fail.

Fixes: 74e797d ("mm: Provide a means of invalidation without using launder_folio")
Signed-off-by: David Howells <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
cc: Matthew Wilcox <[email protected]>
cc: Miklos Szeredi <[email protected]>
cc: Trond Myklebust <[email protected]>
cc: Christoph Hellwig <[email protected]>
cc: Andrew Morton <[email protected]>
cc: Alexander Viro <[email protected]>
cc: Christian Brauner <[email protected]>
cc: Jeff Layton <[email protected]>
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
cc: [email protected]
Signed-off-by: Christian Brauner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

mm/filemap.c

@@ -4221,7 +4221,7 @@ int filemap_invalidate_inode(struct inode *inode, bool flush,
 	}
 
 	/* Wait for writeback to complete on all folios and discard. */
-	truncate_inode_pages_range(mapping, start, end);
+	invalidate_inode_pages2_range(mapping, start / PAGE_SIZE, end / PAGE_SIZE);
 
 unlock:
 	filemap_invalidate_unlock(mapping);