  We demonstrate that the metallic topological surface states wrap on all sides
the 3D topological crystalline insulator SnTe. This is achieved by studying
oscillatory quantum magneto-transport and magnetization at tilted magnetic
fields which enables us to observe simultaneous contributions from neighbouring
sample sides. Taking into account pinning of the Fermi energy by the SnTe
reservoir we successfully describe theoretically the de Haas-van Alphen
oscillations of magnetization. The determined \pi-Berry phase of surface states
confirms their Dirac fermion character. We independently observe oscillatory
contributions of magneto-transport and magnetization originating from the bulk
SnTe reservoir of high hole density. It is concluded that the bulk and surface
Landau states exist in parallel. Our main result that the bulk reservoir is
surrounded on all sides by the topological surface states has an universal
character.
