vanish.c File Reference

#include "vanish.h"
#include <asm/cpufeature.h>
#include <linux/dmi.h>
#include "config.h"

Include dependency graph for vanish.c:

Go to the source code of this file.

Functions
bool	check_hypervisor (void)
	Checks if the system is running under a hypervisor.
bool	check_dmi (void)
	Checks if the system is running in a known virtualized environment.
bool	is_running_in_virtual_env (void)
	Determines if the system is running in a virtualized environment.

Function Documentation

check_dmi()

bool check_dmi

(

void

)

Checks if the system is running in a known virtualized environment.

This function uses DMI (Desktop Management Interface) system information to check for known virtual machine vendors such as VMware, VirtualBox, QEMU, and others lol.

Returns

true if a virtualized environment is detected, false otherwise.

Definition at line 29 of file vanish.c.

                     {
    static const struct dmi_system_id hypervisor_dmi_table[] = {
        { .ident = "VMware", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "VMware") } },
        { .ident = "VirtualBox",
          .matches = { DMI_MATCH(DMI_SYS_VENDOR, "innotek GmbH") } },
        { .ident = "QEMU", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "QEMU") } },
        { .ident = "DigitalOcean",
          .matches = { DMI_MATCH(DMI_SYS_VENDOR, "DigitalOcean") } },
        { .ident = "OpenStack",
          .matches = { DMI_MATCH(DMI_SYS_VENDOR, "OpenStack") } },
        { .ident = "Scaleway", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Scaleway") } },
        {}
    };
 
    return dmi_check_system(hypervisor_dmi_table) > 0;
}

check_hypervisor()

bool check_hypervisor

(

void

)

Checks if the system is running under a hypervisor.

This function uses the CPU feature flags to determine if the system is running under a hypervisor.

Returns

true if a hypervisor is detected, false otherwise.

Definition at line 16 of file vanish.c.

                            {
    return boot_cpu_has(X86_FEATURE_HYPERVISOR);
}

is_running_in_virtual_env()

bool is_running_in_virtual_env

(

void

)

Determines if the system is running in a virtualized environment.

This function combines the results of check_hypervisor and check_dmi to determine if the system is running in a virtualized environment.

Returns

true if the system is running in a virtualized environment, false otherwise.

Definition at line 55 of file vanish.c.

                                     {
    if (check_hypervisor()) {
        ERR_MSG("vanish: hypervisor detected...");
        return true;
    }
 
    if (check_dmi()) {
        ERR_MSG("vanish: virtual environment detected...");
        return true;
    }
 
    return false;
}