/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2011 Lennart Poettering
-***/
#if defined(__i386__) || defined(__x86_64__)
#include <cpuid.h>
/* https://wiki.freebsd.org/bhyve */
{ "bhyve bhyve ", VIRTUALIZATION_BHYVE },
{ "QNXQVMBSQG", VIRTUALIZATION_QNX },
+ /* https://projectacrn.org */
+ { "ACRNACRNACRN", VIRTUALIZATION_ACRN },
};
uint32_t eax, ebx, ecx, edx;
if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) == 0)
return VIRTUALIZATION_NONE;
- hypervisor = !!(ecx & 0x80000000U);
+ hypervisor = ecx & 0x80000000U;
if (hypervisor) {
union {
const char *vendor;
int id;
} dmi_vendor_table[] = {
- { "KVM", VIRTUALIZATION_KVM },
- { "QEMU", VIRTUALIZATION_QEMU },
- /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
- { "VMware", VIRTUALIZATION_VMWARE },
- { "VMW", VIRTUALIZATION_VMWARE },
- { "innotek GmbH", VIRTUALIZATION_ORACLE },
- { "Xen", VIRTUALIZATION_XEN },
- { "Bochs", VIRTUALIZATION_BOCHS },
- { "Parallels", VIRTUALIZATION_PARALLELS },
+ { "KVM", VIRTUALIZATION_KVM },
+ { "QEMU", VIRTUALIZATION_QEMU },
+ { "VMware", VIRTUALIZATION_VMWARE }, /* https://kb.vmware.com/s/article/1009458 */
+ { "VMW", VIRTUALIZATION_VMWARE },
+ { "innotek GmbH", VIRTUALIZATION_ORACLE },
+ { "Oracle Corporation", VIRTUALIZATION_ORACLE },
+ { "Xen", VIRTUALIZATION_XEN },
+ { "Bochs", VIRTUALIZATION_BOCHS },
+ { "Parallels", VIRTUALIZATION_PARALLELS },
/* https://wiki.freebsd.org/bhyve */
- { "BHYVE", VIRTUALIZATION_BHYVE },
+ { "BHYVE", VIRTUALIZATION_BHYVE },
};
unsigned i;
int r;
/* Returns -errno, or 0 for domU, or 1 for dom0 */
static int detect_vm_xen_dom0(void) {
_cleanup_free_ char *domcap = NULL;
- char *cap, *i;
int r;
r = read_one_line_file(PATH_FEATURES, &domcap);
if (r < 0 && r != -ENOENT)
return r;
- if (r == 0) {
+ if (r >= 0) {
unsigned long features;
/* Here, we need to use sscanf() instead of safe_atoul()
if (r < 0)
return r;
- i = domcap;
- while ((cap = strsep(&i, ",")))
- if (streq(cap, "control_d"))
- break;
- if (!cap) {
- log_debug("Virtualization XEN DomU found (/proc/xen/capabilites)");
- return 0;
- }
+ for (const char *i = domcap;;) {
+ _cleanup_free_ char *cap = NULL;
+
+ r = extract_first_word(&i, &cap, ",", 0);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ log_debug("Virtualization XEN DomU found (/proc/xen/capabilities)");
+ return 0;
+ }
- log_debug("Virtualization XEN Dom0 ignored (/proc/xen/capabilities)");
- return 1;
+ if (streq(cap, "control_d")) {
+ log_debug("Virtualization XEN Dom0 ignored (/proc/xen/capabilities)");
+ return 1;
+ }
+ }
}
static int detect_vm_hypervisor(void) {
}
static int detect_vm_uml(void) {
- _cleanup_free_ char *cpuinfo_contents = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
int r;
/* Detect User-Mode Linux by reading /proc/cpuinfo */
- r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL);
- if (r == -ENOENT) {
- log_debug("/proc/cpuinfo not found, assuming no UML virtualization.");
- return VIRTUALIZATION_NONE;
+ f = fopen("/proc/cpuinfo", "re");
+ if (!f) {
+ if (errno == ENOENT) {
+ log_debug("/proc/cpuinfo not found, assuming no UML virtualization.");
+ return VIRTUALIZATION_NONE;
+ }
+ return -errno;
}
- if (r < 0)
- return r;
- if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n")) {
- log_debug("UML virtualization found in /proc/cpuinfo");
- return VIRTUALIZATION_UML;
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+ const char *t;
+
+ r = read_line(f, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ t = startswith(line, "vendor_id\t: ");
+ if (t) {
+ if (startswith(t, "User Mode Linux")) {
+ log_debug("UML virtualization found in /proc/cpuinfo");
+ return VIRTUALIZATION_UML;
+ }
+
+ break;
+ }
}
log_debug("UML virtualization not found in /proc/cpuinfo.");
}
int detect_container(void) {
-
static const struct {
const char *value;
int id;
{ "lxc-libvirt", VIRTUALIZATION_LXC_LIBVIRT },
{ "systemd-nspawn", VIRTUALIZATION_SYSTEMD_NSPAWN },
{ "docker", VIRTUALIZATION_DOCKER },
+ { "podman", VIRTUALIZATION_PODMAN },
{ "rkt", VIRTUALIZATION_RKT },
+ { "wsl", VIRTUALIZATION_WSL },
};
static thread_local int cached_found = _VIRTUALIZATION_INVALID;
_cleanup_free_ char *m = NULL;
+ _cleanup_free_ char *o = NULL;
const char *e = NULL;
unsigned j;
int r;
goto finish;
}
- if (getpid_cached() == 1) {
- /* If we are PID 1 we can just check our own environment variable, and that's authoritative. */
+ /* "Official" way of detecting WSL https://github.com/Microsoft/WSL/issues/423#issuecomment-221627364 */
+ r = read_one_line_file("/proc/sys/kernel/osrelease", &o);
+ if (r >= 0) {
+ if (strstr(o, "Microsoft") || strstr(o, "WSL")) {
+ r = VIRTUALIZATION_WSL;
+ goto finish;
+ }
+ }
+ if (getpid_cached() == 1) {
+ /* If we are PID 1 we can just check our own environment variable, and that's authoritative.
+ * We distinguish three cases:
+ * - the variable is not defined → we jump to other checks
+ * - the variable is defined to an empty value → we are not in a container
+ * - anything else → some container, either one of the known ones or "container-other"
+ */
e = getenv("container");
+ if (!e)
+ goto check_sched;
if (isempty(e)) {
r = VIRTUALIZATION_NONE;
goto finish;
/* Otherwise, PID 1 might have dropped this information into a file in /run. This is better than accessing
* /proc/1/environ, since we don't need CAP_SYS_PTRACE for that. */
r = read_one_line_file("/run/systemd/container", &m);
- if (r >= 0) {
+ if (r > 0) {
e = m;
goto translate_name;
}
- if (r != -ENOENT)
+ if (!IN_SET(r, -ENOENT, 0))
return log_debug_errno(r, "Failed to read /run/systemd/container: %m");
/* Fallback for cases where PID 1 was not systemd (for example, cases where init=/bin/sh is used. */
if (r < 0) /* This only works if we have CAP_SYS_PTRACE, hence let's better ignore failures here */
log_debug_errno(r, "Failed to read $container of PID 1, ignoring: %m");
- /* Interestingly /proc/1/sched actually shows the host's PID for what we see as PID 1. Hence, if the PID shown
- * there is not 1, we know we are in a PID namespace. and hence a container. */
+ /* Interestingly /proc/1/sched actually shows the host's PID for what we see as PID 1. If the PID
+ * shown there is not 1, we know we are in a PID namespace and hence a container. */
+ check_sched:
r = read_one_line_file("/proc/1/sched", &m);
if (r >= 0) {
const char *t;
[VIRTUALIZATION_PARALLELS] = "parallels",
[VIRTUALIZATION_BHYVE] = "bhyve",
[VIRTUALIZATION_QNX] = "qnx",
+ [VIRTUALIZATION_ACRN] = "acrn",
[VIRTUALIZATION_VM_OTHER] = "vm-other",
[VIRTUALIZATION_SYSTEMD_NSPAWN] = "systemd-nspawn",
[VIRTUALIZATION_LXC] = "lxc",
[VIRTUALIZATION_OPENVZ] = "openvz",
[VIRTUALIZATION_DOCKER] = "docker",
+ [VIRTUALIZATION_PODMAN] = "podman",
[VIRTUALIZATION_RKT] = "rkt",
+ [VIRTUALIZATION_WSL] = "wsl",
[VIRTUALIZATION_CONTAINER_OTHER] = "container-other",
};
projects / thirdparty / systemd.git / blobdiff