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-rw-r--r--src/basic/virt.c383
1 files changed, 197 insertions, 186 deletions
diff --git a/src/basic/virt.c b/src/basic/virt.c
index 1f9843bab..8e398e506 100644
--- a/src/basic/virt.c
+++ b/src/basic/virt.c
@@ -28,25 +28,24 @@
#include "virt.h"
#include "fileio.h"
-static int detect_vm_cpuid(const char **_id) {
+static int detect_vm_cpuid(void) {
/* Both CPUID and DMI are x86 specific interfaces... */
#if defined(__i386__) || defined(__x86_64__)
- static const char cpuid_vendor_table[] =
- "XenVMMXenVMM\0" "xen\0"
- "KVMKVMKVM\0" "kvm\0"
+ static const struct {
+ const char *cpuid;
+ int id;
+ } cpuid_vendor_table[] = {
+ { "XenVMMXenVMM", VIRTUALIZATION_XEN },
+ { "KVMKVMKVM", VIRTUALIZATION_KVM },
/* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
- "VMwareVMware\0" "vmware\0"
+ { "VMwareVMware", VIRTUALIZATION_VMWARE },
/* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
- "Microsoft Hv\0" "microsoft\0";
+ { "Microsoft Hv", VIRTUALIZATION_MICROSOFT },
+ };
uint32_t eax, ecx;
- union {
- uint32_t sig32[3];
- char text[13];
- } sig = {};
- const char *j, *k;
bool hypervisor;
/* http://lwn.net/Articles/301888/ */
@@ -74,6 +73,11 @@ static int detect_vm_cpuid(const char **_id) {
hypervisor = !!(ecx & 0x80000000U);
if (hypervisor) {
+ union {
+ uint32_t sig32[3];
+ char text[13];
+ } sig = {};
+ unsigned j;
/* There is a hypervisor, see what it is */
eax = 0x40000000U;
@@ -88,57 +92,54 @@ static int detect_vm_cpuid(const char **_id) {
: "0" (eax)
);
- NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
- if (streq(sig.text, j)) {
- *_id = k;
- return 1;
- }
+ for (j = 0; j < ELEMENTSOF(cpuid_vendor_table); j ++)
+ if (streq(sig.text, cpuid_vendor_table[j].cpuid))
+ return cpuid_vendor_table[j].id;
- *_id = "other";
- return 0;
+ return VIRTUALIZATION_VM_OTHER;
}
#endif
- return 0;
+ return VIRTUALIZATION_NONE;
}
-static int detect_vm_devicetree(const char **_id) {
+static int detect_vm_device_tree(void) {
#if defined(__arm__) || defined(__aarch64__) || defined(__powerpc__) || defined(__powerpc64__)
_cleanup_free_ char *hvtype = NULL;
int r;
r = read_one_line_file("/proc/device-tree/hypervisor/compatible", &hvtype);
- if (r >= 0) {
- if (streq(hvtype, "linux,kvm")) {
- *_id = "kvm";
- return 1;
- } else if (strstr(hvtype, "xen")) {
- *_id = "xen";
- return 1;
- }
- } else if (r == -ENOENT) {
+ if (r == -ENOENT) {
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
dir = opendir("/proc/device-tree");
if (!dir) {
if (errno == ENOENT)
- return 0;
+ return VIRTUALIZATION_NONE;
return -errno;
}
- FOREACH_DIRENT(dent, dir, return -errno) {
- if (strstr(dent->d_name, "fw-cfg")) {
- *_id = "qemu";
- return 1;
- }
- }
- }
+ FOREACH_DIRENT(dent, dir, return -errno)
+ if (strstr(dent->d_name, "fw-cfg"))
+ return VIRTUALIZATION_QEMU;
+
+ return VIRTUALIZATION_NONE;
+ } else if (r < 0)
+ return r;
+
+ if (streq(hvtype, "linux,kvm"))
+ return VIRTUALIZATION_KVM;
+ else if (strstr(hvtype, "xen"))
+ return VIRTUALIZATION_XEN;
+ else
+ return VIRTUALIZATION_VM_OTHER;
+#else
+ return VIRTUALIZATION_NONE;
#endif
- return 0;
}
-static int detect_vm_dmi(const char **_id) {
+static int detect_vm_dmi(void) {
/* Both CPUID and DMI are x86 specific interfaces... */
#if defined(__i386__) || defined(__x86_64__)
@@ -149,188 +150,195 @@ static int detect_vm_dmi(const char **_id) {
"/sys/class/dmi/id/bios_vendor"
};
- static const char dmi_vendor_table[] =
- "QEMU\0" "qemu\0"
+ static const struct {
+ const char *vendor;
+ int id;
+ } dmi_vendor_table[] = {
+ { "QEMU", VIRTUALIZATION_QEMU },
/* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
- "VMware\0" "vmware\0"
- "VMW\0" "vmware\0"
- "innotek GmbH\0" "oracle\0"
- "Xen\0" "xen\0"
- "Bochs\0" "bochs\0"
- "Parallels\0" "parallels\0";
+ { "VMware", VIRTUALIZATION_VMWARE },
+ { "VMW", VIRTUALIZATION_VMWARE },
+ { "innotek GmbH", VIRTUALIZATION_ORACLE },
+ { "Xen", VIRTUALIZATION_XEN },
+ { "Bochs", VIRTUALIZATION_BOCHS },
+ { "Parallels", VIRTUALIZATION_PARALLELS },
+ };
unsigned i;
+ int r;
for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
_cleanup_free_ char *s = NULL;
- const char *j, *k;
- int r;
+ unsigned j;
r = read_one_line_file(dmi_vendors[i], &s);
if (r < 0) {
- if (r != -ENOENT)
- return r;
-
+ if (r == -ENOENT)
continue;
- }
- NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
- if (startswith(s, j)) {
- *_id = k;
- return 1;
+ return r;
}
+
+ for (j = 0; j < ELEMENTSOF(dmi_vendor_table); j++)
+ if (startswith(s, dmi_vendor_table[j].vendor))
+ return dmi_vendor_table[j].id;
}
#endif
- return 0;
+ return VIRTUALIZATION_NONE;
}
-/* Returns a short identifier for the various VM implementations */
-int detect_vm(const char **id) {
- _cleanup_free_ char *domcap = NULL, *cpuinfo_contents = NULL;
- static thread_local int cached_found = -1;
- static thread_local const char *cached_id = NULL;
- const char *_id = NULL, *_id_cpuid = NULL;
+static int detect_vm_xen(void) {
+ _cleanup_free_ char *domcap = NULL;
+ char *cap, *i;
int r;
- if (_likely_(cached_found >= 0)) {
-
- if (id)
- *id = cached_id;
-
- return cached_found;
- }
-
- /* Try xen capabilities file first, if not found try high-level hypervisor sysfs file:
- *
- * https://bugs.freedesktop.org/show_bug.cgi?id=77271 */
r = read_one_line_file("/proc/xen/capabilities", &domcap);
- if (r >= 0) {
- char *cap, *i = domcap;
+ if (r == -ENOENT)
+ return VIRTUALIZATION_NONE;
+ i = domcap;
while ((cap = strsep(&i, ",")))
if (streq(cap, "control_d"))
break;
- if (!cap) {
- _id = "xen";
- r = 1;
+ return cap ? VIRTUALIZATION_NONE : VIRTUALIZATION_XEN;
}
- goto finish;
-
- } else if (r == -ENOENT) {
+static int detect_vm_hypervisor(void) {
_cleanup_free_ char *hvtype = NULL;
+ int r;
r = read_one_line_file("/sys/hypervisor/type", &hvtype);
- if (r >= 0) {
- if (streq(hvtype, "xen")) {
- _id = "xen";
- r = 1;
- goto finish;
- }
- } else if (r != -ENOENT)
- return r;
- } else
+ if (r == -ENOENT)
+ return VIRTUALIZATION_NONE;
+ if (r < 0)
return r;
- /* this will set _id to "other" and return 0 for unknown hypervisors */
- r = detect_vm_cpuid(&_id);
+ if (streq(hvtype, "xen"))
+ return VIRTUALIZATION_XEN;
+ else
+ return VIRTUALIZATION_VM_OTHER;
+}
- /* finish when found a known hypervisor other than kvm */
- if (r < 0 || (r > 0 && !streq(_id, "kvm")))
- goto finish;
+static int detect_vm_uml(void) {
+ _cleanup_free_ char *cpuinfo_contents = NULL;
+ int r;
+
+ /* Detect User-Mode Linux by reading /proc/cpuinfo */
+ r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL);
+ if (r < 0)
+ return r;
+ if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n"))
+ return VIRTUALIZATION_UML;
- _id_cpuid = _id;
+ return VIRTUALIZATION_NONE;
+}
- r = detect_vm_dmi(&_id);
+static int detect_vm_zvm(void) {
- /* kvm with and without Virtualbox */
- /* Parallels exports KVMKVMKVM leaf */
- if (streq_ptr(_id_cpuid, "kvm")) {
- if (r > 0 && (streq(_id, "oracle") || streq(_id, "parallels")))
- goto finish;
+#if defined(__s390__)
+ _cleanup_free_ char *t = NULL;
+ int r;
- _id = _id_cpuid;
- r = 1;
- goto finish;
+ r = get_proc_field("/proc/sysinfo", "VM00 Control Program", WHITESPACE, &t);
+ if (r == -ENOENT)
+ return VIRTUALIZATION_NONE;
+ if (r < 0)
+ return r;
+
+ if (streq(t, "z/VM"))
+ return VIRTUALIZATION_ZVM;
+ else
+ return VIRTUALIZATION_KVM;
+#else
+ return VIRTUALIZATION_NONE;
+#endif
}
- /* information from dmi */
- if (r != 0)
- goto finish;
+/* Returns a short identifier for the various VM implementations */
+int detect_vm(void) {
+ static thread_local int cached_found = _VIRTUALIZATION_INVALID;
+ int r;
- r = detect_vm_devicetree(&_id);
- if (r != 0)
+ if (cached_found >= 0)
+ return cached_found;
+
+ /* Try xen capabilities file first, if not found try
+ * high-level hypervisor sysfs file:
+ *
+ * https://bugs.freedesktop.org/show_bug.cgi?id=77271 */
+
+ r = detect_vm_xen();
+ if (r < 0)
+ return r;
+ if (r != VIRTUALIZATION_NONE)
goto finish;
- if (_id) {
- /* "other" */
- r = 1;
+ r = detect_vm_dmi();
+ if (r < 0)
+ return r;
+ if (r != VIRTUALIZATION_NONE)
goto finish;
- }
- /* Detect User-Mode Linux by reading /proc/cpuinfo */
- r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL);
+ r = detect_vm_cpuid();
if (r < 0)
return r;
- if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n")) {
- _id = "uml";
- r = 1;
+ if (r != VIRTUALIZATION_NONE)
goto finish;
- }
-#if defined(__s390__)
- {
- _cleanup_free_ char *t = NULL;
+ r = detect_vm_hypervisor();
+ if (r < 0)
+ return r;
+ if (r != VIRTUALIZATION_NONE)
+ goto finish;
- r = get_status_field("/proc/sysinfo", "VM00 Control Program:", &t);
- if (r >= 0) {
- if (streq(t, "z/VM"))
- _id = "zvm";
- else
- _id = "kvm";
- r = 1;
+ r = detect_vm_device_tree();
+ if (r < 0)
+ return r;
+ if (r != VIRTUALIZATION_NONE)
+ goto finish;
+ r = detect_vm_uml();
+ if (r < 0)
+ return r;
+ if (r != VIRTUALIZATION_NONE)
goto finish;
- }
- }
-#endif
- r = 0;
+ r = detect_vm_zvm();
+ if (r < 0)
+ return r;
finish:
cached_found = r;
-
- cached_id = _id;
- if (id)
- *id = _id;
-
return r;
}
-int detect_container(const char **id) {
+int detect_container(void) {
- static thread_local int cached_found = -1;
- static thread_local const char *cached_id = NULL;
+ static const struct {
+ const char *value;
+ int id;
+ } value_table[] = {
+ { "lxc", VIRTUALIZATION_LXC },
+ { "lxc-libvirt", VIRTUALIZATION_LXC_LIBVIRT },
+ { "systemd-nspawn", VIRTUALIZATION_SYSTEMD_NSPAWN },
+ { "docker", VIRTUALIZATION_DOCKER },
+ };
+ static thread_local int cached_found = _VIRTUALIZATION_INVALID;
_cleanup_free_ char *m = NULL;
- const char *_id = NULL, *e = NULL;
+ const char *e = NULL;
+ unsigned j;
int r;
- if (_likely_(cached_found >= 0)) {
-
- if (id)
- *id = cached_id;
-
+ if (cached_found >= 0)
return cached_found;
- }
/* /proc/vz exists in container and outside of the container,
* /proc/bc only outside of the container. */
if (access("/proc/vz", F_OK) >= 0 &&
access("/proc/bc", F_OK) < 0) {
- _id = "openvz";
- r = 1;
+ r = VIRTUALIZATION_OPENVZ;
goto finish;
}
@@ -340,7 +348,7 @@ int detect_container(const char **id) {
e = getenv("container");
if (isempty(e)) {
- r = 0;
+ r = VIRTUALIZATION_NONE;
goto finish;
}
} else {
@@ -369,7 +377,7 @@ int detect_container(const char **id) {
* as /proc/1/environ is only readable
* with privileges. */
- r = 0;
+ r = VIRTUALIZATION_NONE;
goto finish;
}
}
@@ -379,49 +387,52 @@ int detect_container(const char **id) {
e = m;
}
- /* We only recognize a selected few here, since we want to
- * enforce a redacted namespace */
- if (streq(e, "lxc"))
- _id ="lxc";
- else if (streq(e, "lxc-libvirt"))
- _id = "lxc-libvirt";
- else if (streq(e, "systemd-nspawn"))
- _id = "systemd-nspawn";
- else if (streq(e, "docker"))
- _id = "docker";
- else
- _id = "other";
+ for (j = 0; j < ELEMENTSOF(value_table); j++)
+ if (streq(e, value_table[j].value)) {
+ r = value_table[j].id;
+ goto finish;
+ }
- r = 1;
+ r = VIRTUALIZATION_NONE;
finish:
cached_found = r;
-
- cached_id = _id;
- if (id)
- *id = _id;
-
return r;
}
/// UNNEEDED by elogind
#if 0
-/* Returns a short identifier for the various VM/container implementations */
-int detect_virtualization(const char **id) {
+int detect_virtualization(void) {
int r;
- r = detect_container(id);
- if (r < 0)
- return r;
- if (r > 0)
- return VIRTUALIZATION_CONTAINER;
-
- r = detect_vm(id);
- if (r < 0)
+ r = detect_container();
+ if (r != 0)
return r;
- if (r > 0)
- return VIRTUALIZATION_VM;
- return VIRTUALIZATION_NONE;
+ return detect_vm();
}
#endif // 0
+
+static const char *const virtualization_table[_VIRTUALIZATION_MAX] = {
+ [VIRTUALIZATION_NONE] = "none",
+ [VIRTUALIZATION_KVM] = "kvm",
+ [VIRTUALIZATION_QEMU] = "qemu",
+ [VIRTUALIZATION_BOCHS] = "bochs",
+ [VIRTUALIZATION_XEN] = "xen",
+ [VIRTUALIZATION_UML] = "uml",
+ [VIRTUALIZATION_VMWARE] = "vmware",
+ [VIRTUALIZATION_ORACLE] = "oracle",
+ [VIRTUALIZATION_MICROSOFT] = "microsoft",
+ [VIRTUALIZATION_ZVM] = "zvm",
+ [VIRTUALIZATION_PARALLELS] = "parallels",
+ [VIRTUALIZATION_VM_OTHER] = "vm-other",
+
+ [VIRTUALIZATION_SYSTEMD_NSPAWN] = "systemd-nspawn",
+ [VIRTUALIZATION_LXC_LIBVIRT] = "lxc-libvirt",
+ [VIRTUALIZATION_LXC] = "lxc",
+ [VIRTUALIZATION_OPENVZ] = "openvz",
+ [VIRTUALIZATION_DOCKER] = "docker",
+ [VIRTUALIZATION_CONTAINER_OTHER] = "container-other",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(virtualization, int);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 23:54:59 +0000