Commit 7054674e authored by Christian Brauner's avatar Christian Brauner Committed by Al Viro
Browse files

selftests/mount_setattr: adapt detached mount propagation test 



Make sure that detached trees don't receive mount propagation.

Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 290da20e

tools/testing/selftests/mount_setattr/mount_setattr_test.c

+1 −16
Original line number Diff line number Diff line
@@ -2079,24 +2079,9 @@ TEST_F(mount_setattr, detached_tree_propagation) 
	 * means that the device information will be different for any

	 * statx() that was taken from /mnt/A before the mount compared

	 * to one after the mount.

	 *

	 * Since we already now that the device information between the

	 * stx1 and stx2 samples are identical we also now that stx2 and

	 * stx3 device information will necessarily differ.

	 */

	ASSERT_NE(stx1.stx_dev_minor, stx3.stx_dev_minor);



	/*

	 * If mount propagation worked correctly then the tmpfs mount

	 * that was created after the mount namespace was unshared will

	 * have propagated onto /mnt/A in the detached mount tree.

	 *

	 * Verify that the device information for stx3 and stx4 are

	 * identical. It is already established that stx3 is different

	 * from both stx1 and stx2 sampled before the tmpfs mount was

	 * done so if stx3 and stx4 are identical the proof is done.

	 */

	ASSERT_EQ(stx3.stx_dev_minor, stx4.stx_dev_minor);

	ASSERT_EQ(stx1.stx_dev_minor, stx4.stx_dev_minor);



	EXPECT_EQ(close(fd_tree), 0);

}