mknod$loop(&(0x7f0000000400)='./file0\x00', 0x6000, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file0\x00', 0x0, 0x0)
ioctl$LOOP_SET_BLOCK_SIZE(r0, 0x4c09, 0x800)