rem: bfs_write_pages(fs_volume _fs, fs_vnode _v, fs_cookie _cookie, off_t pos,
add: bfs_write_pages(fs_volume _fs, fs_vnode _node, fs_cookie _cookie, off_t pos,
context: bfs_write_pages(fs_volume _fs, fs_vnode _v, fs_cookie _cookie, off_t pos,	const iovec *vecs, size_t count, size_t *_numBytes){	return EPERM;}