Samba version 4.15.13

[share1]$ mkdir folder ; chmod 700 folder
[share1]$ ls -al .
total 16
drwxrwxrwx  4 admin administrators 4096 2023-08-15 16:12 ./
drwxrwxrwx 41 admin administrators 4096 2023-08-15 16:12 ../
drwx------  2 mike  everyone       4096 2023-08-15 16:12 folder/

---

If aio_pthread is loaded, folder(or file) doesn't show when user doesn't have permission 

[global]
vfs objects = aio_pthread

$ smbclient //localhost/share1 -U aaa -c 'ls'
  .                                   D        0  Tue Aug 15 16:12:49 2023
  ..                                  D        0  Tue Aug 15 16:12:01 2023

If aio_pthread is not loaded, folder is shown.

[global]
vfs objects = 

$ smbclient //localhost/share1 -U aaa -c 'ls'
  .                                   D        0  Tue Aug 15 16:12:49 2023
  ..                                  D        0  Tue Aug 15 16:12:01 2023
  folder                              D        0  Tue Aug 15 16:12:49 2023
  
  
strace can show the difference:
* aio_pthread is not loaded
openat(45, "second", O_RDONLY|O_DIRECTORY |O_PATH ) = 15
* aio_pthread is loaded
openat(15, "second", O_RDONLY|O_DIRECTORY) = -1 EACCES (Permission denied)

---

After commit cf3c48cb08811e45b6d88a4c27b873485321beb0
vfswrap_openat() support O_PATH (pathref) but aio_pthread_openat_fn not.
Should we use SMB_VFS_NEXT_OPENAT if aio_allow_open = false ?

static int aio_pthread_openat_fn(vfs_handle_struct *handle,
				 const struct files_struct *dirfsp,
				 const struct smb_filename *smb_fname,
				 struct files_struct *fsp,
				 int flags,
				 mode_t mode)
{
        /* ... */

	if (!aio_allow_open) {
		/* aio opens turned off. */
		- return openat(fsp_get_pathref_fd(dirfsp),
		-	      smb_fname->base_name,
		-	      flags,
		-	      mode);
		+ return SMB_VFS_NEXT_OPENAT(handle,
		+			   dirfsp,
		+			   smb_fname,
		+			   fsp,
		+			   flags,
		+			   mode);
	}

        /* ... */
}