diff options
Diffstat (limited to 'src/shared/virt.c')
| -rw-r--r-- | src/shared/virt.c | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/src/shared/virt.c b/src/shared/virt.c deleted file mode 100644 index fc62c72328..0000000000 --- a/src/shared/virt.c +++ /dev/null @@ -1,259 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <string.h> -#include <errno.h> -#include <unistd.h> - -#include "util.h" -#include "virt.h" - -/* Returns a short identifier for the various VM implementations */ -int detect_vm(const char **id) { - -#if defined(__i386__) || defined(__x86_64__) - - /* Both CPUID and DMI are x86 specific interfaces... */ - - static const char *const dmi_vendors[] = { - "/sys/class/dmi/id/sys_vendor", - "/sys/class/dmi/id/board_vendor", - "/sys/class/dmi/id/bios_vendor" - }; - - static const char dmi_vendor_table[] = - "QEMU\0" "qemu\0" - /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ - "VMware\0" "vmware\0" - "VMW\0" "vmware\0" - "Microsoft Corporation\0" "microsoft\0" - "innotek GmbH\0" "oracle\0" - "Xen\0" "xen\0" - "Bochs\0" "bochs\0"; - - static const char cpuid_vendor_table[] = - "XenVMMXenVMM\0" "xen\0" - "KVMKVMKVM\0" "kvm\0" - /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ - "VMwareVMware\0" "vmware\0" - /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */ - "Microsoft Hv\0" "microsoft\0"; - - uint32_t eax, ecx; - union { - uint32_t sig32[3]; - char text[13]; - } sig; - unsigned i; - const char *j, *k; - bool hypervisor; - - /* http://lwn.net/Articles/301888/ */ - zero(sig); - -#if defined (__i386__) -#define REG_a "eax" -#define REG_b "ebx" -#elif defined (__amd64__) -#define REG_a "rax" -#define REG_b "rbx" -#endif - - /* First detect whether there is a hypervisor */ - eax = 1; - __asm__ __volatile__ ( - /* ebx/rbx is being used for PIC! */ - " push %%"REG_b" \n\t" - " cpuid \n\t" - " pop %%"REG_b" \n\t" - - : "=a" (eax), "=c" (ecx) - : "0" (eax) - ); - - hypervisor = !!(ecx & 0x80000000U); - - if (hypervisor) { - - /* There is a hypervisor, see what it is */ - eax = 0x40000000U; - __asm__ __volatile__ ( - /* ebx/rbx is being used for PIC! */ - " push %%"REG_b" \n\t" - " cpuid \n\t" - " mov %%ebx, %1 \n\t" - " pop %%"REG_b" \n\t" - - : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2]) - : "0" (eax) - ); - - NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table) - if (streq(sig.text, j)) { - - if (id) - *id = k; - - return 1; - } - } - - for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) { - char *s; - int r; - const char *found = NULL; - - if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) { - if (r != -ENOENT) - return r; - - continue; - } - - NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table) - if (startswith(s, j)) - found = k; - free(s); - - if (found) { - if (id) - *id = found; - - return 1; - } - } - - if (hypervisor) { - if (id) - *id = "other"; - - return 1; - } - -#endif - return 0; -} - -int detect_container(const char **id) { - char *e = NULL; - int r; - - /* Unfortunately many of these operations require root access - * in one way or another */ - - r = running_in_chroot(); - if (r < 0) - return r; - if (r > 0) { - - if (id) - *id = "chroot"; - - return 1; - } - - /* /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) { - - if (id) - *id = "openvz"; - - return 1; - } - - r = getenv_for_pid(1, "container", &e); - if (r <= 0) - return r; - - /* We only recognize a selected few here, since we want to - * enforce a redacted namespace */ - if (streq(e, "lxc")) { - if (id) - *id = "lxc"; - } else if (streq(e, "lxc-libvirt")) { - if (id) - *id = "lxc-libvirt"; - } else if (streq(e, "systemd-nspawn")) { - if (id) - *id = "systemd-nspawn"; - } else { - if (id) - *id = "other"; - } - - free(e); - - return r; -} - -/* Returns a short identifier for the various VM/container implementations */ -Virtualization detect_virtualization(const char **id) { - - static __thread Virtualization cached_virt = _VIRTUALIZATION_INVALID; - static __thread const char *cached_id = NULL; - - const char *_id; - int r; - Virtualization v; - - if (_likely_(cached_virt >= 0)) { - - if (id && cached_virt > 0) - *id = cached_id; - - return cached_virt; - } - - r = detect_container(&_id); - if (r < 0) { - v = r; - goto finish; - } else if (r > 0) { - v = VIRTUALIZATION_CONTAINER; - goto finish; - } - - r = detect_vm(&_id); - if (r < 0) { - v = r; - goto finish; - } else if (r > 0) { - v = VIRTUALIZATION_VM; - goto finish; - } - - v = VIRTUALIZATION_NONE; - -finish: - if (v > 0) { - cached_id = _id; - - if (id) - *id = _id; - } - - if (v >= 0) - cached_virt = v; - - return v; -} |