fuse: fix "direct_io" private mmap
MAP_PRIVATE mmap could return stale data from the cache for
"direct_io" files. Fix this by flushing the cache on mmap.
Found with a slightly modified fsx-linux.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 0946861..06f30e9 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1298,6 +1298,8 @@
if (vma->vm_flags & VM_MAYSHARE)
return -ENODEV;
+ invalidate_inode_pages2(file->f_mapping);
+
return generic_file_mmap(file, vma);
}
