src/basic/virt.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #if defined(__i386__) || defined(__x86_64__)
   4 //#include <cpuid.h>
   5 #endif
   6 #include <errno.h>
   7 #include <stdint.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11
  12 #include "alloc-util.h"
  13 #include "dirent-util.h"
  14 #include "env-util.h"
  15 #include "fd-util.h"
  16 #include "fileio.h"
  17 #include "macro.h"
  18 #include "process-util.h"
  19 #include "stat-util.h"
  20 #include "string-table.h"
  21 #include "string-util.h"
  22 #include "virt.h"
  23
  24 #if 0 /// UNNEEDED by elogind
  25 static int detect_vm_cpuid(void) {
  26
  27         /* CPUID is an x86 specific interface. */
  28 #if defined(__i386__) || defined(__x86_64__)
  29
  30         static const struct {
  31                 const char *cpuid;
  32                 int id;
  33         } cpuid_vendor_table[] = {
  34                 { "XenVMMXenVMM", VIRTUALIZATION_XEN       },
  35                 { "KVMKVMKVM",    VIRTUALIZATION_KVM       },
  36                 { "TCGTCGTCGTCG", VIRTUALIZATION_QEMU      },
  37                 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
  38                 { "VMwareVMware", VIRTUALIZATION_VMWARE    },
  39                 /* https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs */
  40                 { "Microsoft Hv", VIRTUALIZATION_MICROSOFT },
  41                 /* https://wiki.freebsd.org/bhyve */
  42                 { "bhyve bhyve ", VIRTUALIZATION_BHYVE     },
  43                 { "QNXQVMBSQG",   VIRTUALIZATION_QNX       },
  44         };
  45
  46         uint32_t eax, ebx, ecx, edx;
  47         bool hypervisor;
  48
  49         /* http://lwn.net/Articles/301888/ */
  50
  51         /* First detect whether there is a hypervisor */
  52         if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) == 0)
  53                 return VIRTUALIZATION_NONE;
  54
  55         hypervisor = ecx & 0x80000000U;
  56
  57         if (hypervisor) {
  58                 union {
  59                         uint32_t sig32[3];
  60                         char text[13];
  61                 } sig = {};
  62                 unsigned j;
  63
  64                 /* There is a hypervisor, see what it is */
  65                 __cpuid(0x40000000U, eax, ebx, ecx, edx);
  66
  67                 sig.sig32[0] = ebx;
  68                 sig.sig32[1] = ecx;
  69                 sig.sig32[2] = edx;
  70
  71                 log_debug("Virtualization found, CPUID=%s", sig.text);
  72
  73                 for (j = 0; j < ELEMENTSOF(cpuid_vendor_table); j ++)
  74                         if (streq(sig.text, cpuid_vendor_table[j].cpuid))
  75                                 return cpuid_vendor_table[j].id;
  76
  77                 return VIRTUALIZATION_VM_OTHER;
  78         }
  79 #endif
  80         log_debug("No virtualization found in CPUID");
  81
  82         return VIRTUALIZATION_NONE;
  83 }
  84
  85 static int detect_vm_device_tree(void) {
  86 #if defined(__arm__) || defined(__aarch64__) || defined(__powerpc__) || defined(__powerpc64__)
  87         _cleanup_free_ char *hvtype = NULL;
  88         int r;
  89
  90         r = read_one_line_file("/proc/device-tree/hypervisor/compatible", &hvtype);
  91         if (r == -ENOENT) {
  92                 _cleanup_closedir_ DIR *dir = NULL;
  93                 struct dirent *dent;
  94
  95                 dir = opendir("/proc/device-tree");
  96                 if (!dir) {
  97                         if (errno == ENOENT) {
  98                                 log_debug_errno(errno, "/proc/device-tree: %m");
  99                                 return VIRTUALIZATION_NONE;
 100                         }
 101                         return -errno;
 102                 }
 103
 104                 FOREACH_DIRENT(dent, dir, return -errno)
 105                         if (strstr(dent->d_name, "fw-cfg")) {
 106                                 log_debug("Virtualization QEMU: \"fw-cfg\" present in /proc/device-tree/%s", dent->d_name);
 107                                 return VIRTUALIZATION_QEMU;
 108                         }
 109
 110                 log_debug("No virtualization found in /proc/device-tree/*");
 111                 return VIRTUALIZATION_NONE;
 112         } else if (r < 0)
 113                 return r;
 114
 115         log_debug("Virtualization %s found in /proc/device-tree/hypervisor/compatible", hvtype);
 116         if (streq(hvtype, "linux,kvm"))
 117                 return VIRTUALIZATION_KVM;
 118         else if (strstr(hvtype, "xen"))
 119                 return VIRTUALIZATION_XEN;
 120         else
 121                 return VIRTUALIZATION_VM_OTHER;
 122 #else
 123         log_debug("This platform does not support /proc/device-tree");
 124         return VIRTUALIZATION_NONE;
 125 #endif
 126 }
 127
 128 static int detect_vm_dmi(void) {
 129 #if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
 130
 131         static const char *const dmi_vendors[] = {
 132                 "/sys/class/dmi/id/product_name", /* Test this before sys_vendor to detect KVM over QEMU */
 133                 "/sys/class/dmi/id/sys_vendor",
 134                 "/sys/class/dmi/id/board_vendor",
 135                 "/sys/class/dmi/id/bios_vendor"
 136         };
 137
 138         static const struct {
 139                 const char *vendor;
 140                 int id;
 141         } dmi_vendor_table[] = {
 142                 { "KVM",           VIRTUALIZATION_KVM       },
 143                 { "QEMU",          VIRTUALIZATION_QEMU      },
 144                 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
 145                 { "VMware",        VIRTUALIZATION_VMWARE    },
 146                 { "VMW",           VIRTUALIZATION_VMWARE    },
 147                 { "innotek GmbH",  VIRTUALIZATION_ORACLE    },
 148                 { "Xen",           VIRTUALIZATION_XEN       },
 149                 { "Bochs",         VIRTUALIZATION_BOCHS     },
 150                 { "Parallels",     VIRTUALIZATION_PARALLELS },
 151                 /* https://wiki.freebsd.org/bhyve */
 152                 { "BHYVE",         VIRTUALIZATION_BHYVE     },
 153         };
 154         unsigned i;
 155         int r;
 156
 157         for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
 158                 _cleanup_free_ char *s = NULL;
 159                 unsigned j;
 160
 161                 r = read_one_line_file(dmi_vendors[i], &s);
 162                 if (r < 0) {
 163                         if (r == -ENOENT)
 164                                 continue;
 165
 166                         return r;
 167                 }
 168
 169                 for (j = 0; j < ELEMENTSOF(dmi_vendor_table); j++)
 170                         if (startswith(s, dmi_vendor_table[j].vendor)) {
 171                                 log_debug("Virtualization %s found in DMI (%s)", s, dmi_vendors[i]);
 172                                 return dmi_vendor_table[j].id;
 173                         }
 174         }
 175 #endif
 176
 177         log_debug("No virtualization found in DMI");
 178
 179         return VIRTUALIZATION_NONE;
 180 }
 181
 182 static int detect_vm_xen(void) {
 183
 184         /* Check for Dom0 will be executed later in detect_vm_xen_dom0
 185            The presence of /proc/xen indicates some form of a Xen domain */
 186         if (access("/proc/xen", F_OK) < 0) {
 187                 log_debug("Virtualization XEN not found, /proc/xen does not exist");
 188                 return VIRTUALIZATION_NONE;
 189         }
 190
 191         log_debug("Virtualization XEN found (/proc/xen exists)");
 192         return VIRTUALIZATION_XEN;
 193 }
 194
 195 #define XENFEAT_dom0 11 /* xen/include/public/features.h */
 196 #define PATH_FEATURES "/sys/hypervisor/properties/features"
 197 /* Returns -errno, or 0 for domU, or 1 for dom0 */
 198 static int detect_vm_xen_dom0(void) {
 199         _cleanup_free_ char *domcap = NULL;
 200         char *cap, *i;
 201         int r;
 202
 203         r = read_one_line_file(PATH_FEATURES, &domcap);
 204         if (r < 0 && r != -ENOENT)
 205                 return r;
 206         if (r == 0) {
 207                 unsigned long features;
 208
 209                 /* Here, we need to use sscanf() instead of safe_atoul()
 210                  * as the string lacks the leading "0x". */
 211                 r = sscanf(domcap, "%lx", &features);
 212                 if (r == 1) {
 213                         r = !!(features & (1U << XENFEAT_dom0));
 214                         log_debug("Virtualization XEN, found %s with value %08lx, "
 215                                   "XENFEAT_dom0 (indicating the 'hardware domain') is%s set.",
 216                                   PATH_FEATURES, features, r ? "" : " not");
 217                         return r;
 218                 }
 219                 log_debug("Virtualization XEN, found %s, unhandled content '%s'",
 220                           PATH_FEATURES, domcap);
 221         }
 222
 223         r = read_one_line_file("/proc/xen/capabilities", &domcap);
 224         if (r == -ENOENT) {
 225                 log_debug("Virtualization XEN because /proc/xen/capabilities does not exist");
 226                 return 0;
 227         }
 228         if (r < 0)
 229                 return r;
 230
 231         i = domcap;
 232         while ((cap = strsep(&i, ",")))
 233                 if (streq(cap, "control_d"))
 234                         break;
 235         if (!cap) {
 236                 log_debug("Virtualization XEN DomU found (/proc/xen/capabilites)");
 237                 return 0;
 238         }
 239
 240         log_debug("Virtualization XEN Dom0 ignored (/proc/xen/capabilities)");
 241         return 1;
 242 }
 243
 244 static int detect_vm_hypervisor(void) {
 245         _cleanup_free_ char *hvtype = NULL;
 246         int r;
 247
 248         r = read_one_line_file("/sys/hypervisor/type", &hvtype);
 249         if (r == -ENOENT)
 250                 return VIRTUALIZATION_NONE;
 251         if (r < 0)
 252                 return r;
 253
 254         log_debug("Virtualization %s found in /sys/hypervisor/type", hvtype);
 255
 256         if (streq(hvtype, "xen"))
 257                 return VIRTUALIZATION_XEN;
 258         else
 259                 return VIRTUALIZATION_VM_OTHER;
 260 }
 261
 262 static int detect_vm_uml(void) {
 263         _cleanup_free_ char *cpuinfo_contents = NULL;
 264         int r;
 265
 266         /* Detect User-Mode Linux by reading /proc/cpuinfo */
 267         r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL);
 268         if (r == -ENOENT) {
 269                 log_debug("/proc/cpuinfo not found, assuming no UML virtualization.");
 270                 return VIRTUALIZATION_NONE;
 271         }
 272         if (r < 0)
 273                 return r;
 274
 275         if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n")) {
 276                 log_debug("UML virtualization found in /proc/cpuinfo");
 277                 return VIRTUALIZATION_UML;
 278         }
 279
 280         log_debug("UML virtualization not found in /proc/cpuinfo.");
 281         return VIRTUALIZATION_NONE;
 282 }
 283
 284 static int detect_vm_zvm(void) {
 285
 286 #if defined(__s390__)
 287         _cleanup_free_ char *t = NULL;
 288         int r;
 289
 290         r = get_proc_field("/proc/sysinfo", "VM00 Control Program", WHITESPACE, &t);
 291         if (r == -ENOENT)
 292                 return VIRTUALIZATION_NONE;
 293         if (r < 0)
 294                 return r;
 295
 296         log_debug("Virtualization %s found in /proc/sysinfo", t);
 297         if (streq(t, "z/VM"))
 298                 return VIRTUALIZATION_ZVM;
 299         else
 300                 return VIRTUALIZATION_KVM;
 301 #else
 302         log_debug("This platform does not support /proc/sysinfo");
 303         return VIRTUALIZATION_NONE;
 304 #endif
 305 }
 306
 307 /* Returns a short identifier for the various VM implementations */
 308 int detect_vm(void) {
 309         static thread_local int cached_found = _VIRTUALIZATION_INVALID;
 310         bool other = false;
 311         int r, dmi;
 312
 313         if (cached_found >= 0)
 314                 return cached_found;
 315
 316         /* We have to use the correct order here:
 317          *
 318          * → First, try to detect Oracle Virtualbox, even if it uses KVM, as well as Xen even if it cloaks as Microsoft
 319          *   Hyper-V.
 320          *
 321          * → Second, try to detect from CPUID, this will report KVM for whatever software is used even if info in DMI is
 322          *   overwritten.
 323          *
 324          * → Third, try to detect from DMI. */
 325
 326         dmi = detect_vm_dmi();
 327         if (IN_SET(dmi, VIRTUALIZATION_ORACLE, VIRTUALIZATION_XEN)) {
 328                 r = dmi;
 329                 goto finish;
 330         }
 331
 332         r = detect_vm_cpuid();
 333         if (r < 0)
 334                 return r;
 335         if (r == VIRTUALIZATION_VM_OTHER)
 336                 other = true;
 337         else if (r != VIRTUALIZATION_NONE)
 338                 goto finish;
 339
 340         /* Now, let's get back to DMI */
 341         if (dmi < 0)
 342                 return dmi;
 343         if (dmi == VIRTUALIZATION_VM_OTHER)
 344                 other = true;
 345         else if (dmi != VIRTUALIZATION_NONE) {
 346                 r = dmi;
 347                 goto finish;
 348         }
 349
 350         /* x86 xen will most likely be detected by cpuid. If not (most likely
 351          * because we're not an x86 guest), then we should try the /proc/xen
 352          * directory next. If that's not found, then we check for the high-level
 353          * hypervisor sysfs file.
 354          */
 355
 356         r = detect_vm_xen();
 357         if (r < 0)
 358                 return r;
 359         if (r == VIRTUALIZATION_VM_OTHER)
 360                 other = true;
 361         else if (r != VIRTUALIZATION_NONE)
 362                 goto finish;
 363
 364         r = detect_vm_hypervisor();
 365         if (r < 0)
 366                 return r;
 367         if (r == VIRTUALIZATION_VM_OTHER)
 368                 other = true;
 369         else if (r != VIRTUALIZATION_NONE)
 370                 goto finish;
 371
 372         r = detect_vm_device_tree();
 373         if (r < 0)
 374                 return r;
 375         if (r == VIRTUALIZATION_VM_OTHER)
 376                 other = true;
 377         else if (r != VIRTUALIZATION_NONE)
 378                 goto finish;
 379
 380         r = detect_vm_uml();
 381         if (r < 0)
 382                 return r;
 383         if (r == VIRTUALIZATION_VM_OTHER)
 384                 other = true;
 385         else if (r != VIRTUALIZATION_NONE)
 386                 goto finish;
 387
 388         r = detect_vm_zvm();
 389         if (r < 0)
 390                 return r;
 391
 392 finish:
 393         /* x86 xen Dom0 is detected as XEN in hypervisor and maybe others.
 394          * In order to detect the Dom0 as not virtualization we need to
 395          * double-check it */
 396         if (r == VIRTUALIZATION_XEN) {
 397                 int dom0;
 398
 399                 dom0 = detect_vm_xen_dom0();
 400                 if (dom0 < 0)
 401                         return dom0;
 402                 if (dom0 > 0)
 403                         r = VIRTUALIZATION_NONE;
 404         } else if (r == VIRTUALIZATION_NONE && other)
 405                 r = VIRTUALIZATION_VM_OTHER;
 406
 407         cached_found = r;
 408         log_debug("Found VM virtualization %s", virtualization_to_string(r));
 409         return r;
 410 }
 411 #endif // 0
 412
 413 int detect_container(void) {
 414
 415         static const struct {
 416                 const char *value;
 417                 int id;
 418         } value_table[] = {
 419                 { "lxc",            VIRTUALIZATION_LXC            },
 420                 { "lxc-libvirt",    VIRTUALIZATION_LXC_LIBVIRT    },
 421                 { "systemd-nspawn", VIRTUALIZATION_SYSTEMD_NSPAWN },
 422                 { "docker",         VIRTUALIZATION_DOCKER         },
 423                 { "rkt",            VIRTUALIZATION_RKT            },
 424         };
 425
 426         static thread_local int cached_found = _VIRTUALIZATION_INVALID;
 427         _cleanup_free_ char *m = NULL;
 428         const char *e = NULL;
 429         unsigned j;
 430         int r;
 431
 432         if (cached_found >= 0)
 433                 return cached_found;
 434
 435         /* /proc/vz exists in container and outside of the container, /proc/bc only outside of the container. */
 436         if (access("/proc/vz", F_OK) >= 0 &&
 437             access("/proc/bc", F_OK) < 0) {
 438                 r = VIRTUALIZATION_OPENVZ;
 439                 goto finish;
 440         }
 441
 442         if (getpid_cached() == 1) {
 443                 /* If we are PID 1 we can just check our own environment variable, and that's authoritative. */
 444
 445                 e = getenv("container");
 446                 if (isempty(e)) {
 447                         r = VIRTUALIZATION_NONE;
 448                         goto finish;
 449                 }
 450
 451                 goto translate_name;
 452         }
 453
 454         /* Otherwise, PID 1 might have dropped this information into a file in /run. This is better than accessing
 455          * /proc/1/environ, since we don't need CAP_SYS_PTRACE for that. */
 456         r = read_one_line_file("/run/systemd/container", &m);
 457         if (r >= 0) {
 458                 e = m;
 459                 goto translate_name;
 460         }
 461         if (r != -ENOENT)
 462                 return log_debug_errno(r, "Failed to read /run/systemd/container: %m");
 463
 464         /* Fallback for cases where PID 1 was not systemd (for example, cases where init=/bin/sh is used. */
 465         r = getenv_for_pid(1, "container", &m);
 466         if (r > 0) {
 467                 e = m;
 468                 goto translate_name;
 469         }
 470         if (r < 0) /* This only works if we have CAP_SYS_PTRACE, hence let's better ignore failures here */
 471                 log_debug_errno(r, "Failed to read $container of PID 1, ignoring: %m");
 472
 473         /* Interestingly /proc/1/sched actually shows the host's PID for what we see as PID 1. Hence, if the PID shown
 474          * there is not 1, we know we are in a PID namespace. and hence a container. */
 475         r = read_one_line_file("/proc/1/sched", &m);
 476         if (r >= 0) {
 477                 const char *t;
 478
 479                 t = strrchr(m, '(');
 480                 if (!t)
 481                         return -EIO;
 482
 483                 if (!startswith(t, "(1,")) {
 484                         r = VIRTUALIZATION_CONTAINER_OTHER;
 485                         goto finish;
 486                 }
 487         } else if (r != -ENOENT)
 488                 return r;
 489
 490         /* If that didn't work, give up, assume no container manager. */
 491         r = VIRTUALIZATION_NONE;
 492         goto finish;
 493
 494 translate_name:
 495         for (j = 0; j < ELEMENTSOF(value_table); j++)
 496                 if (streq(e, value_table[j].value)) {
 497                         r = value_table[j].id;
 498                         goto finish;
 499                 }
 500
 501         r = VIRTUALIZATION_CONTAINER_OTHER;
 502
 503 finish:
 504         log_debug("Found container virtualization %s.", virtualization_to_string(r));
 505         cached_found = r;
 506         return r;
 507 }
 508
 509 #if 0 /// UNNEEDED by elogind
 510 int detect_virtualization(void) {
 511         int r;
 512
 513         r = detect_container();
 514         if (r == 0)
 515                 r = detect_vm();
 516
 517         return r;
 518 }
 519
 520 static int userns_has_mapping(const char *name) {
 521         _cleanup_fclose_ FILE *f = NULL;
 522         _cleanup_free_ char *buf = NULL;
 523         size_t n_allocated = 0;
 524         ssize_t n;
 525         uint32_t a, b, c;
 526         int r;
 527
 528         f = fopen(name, "re");
 529         if (!f) {
 530                 log_debug_errno(errno, "Failed to open %s: %m", name);
 531                 return errno == ENOENT ? false : -errno;
 532         }
 533
 534         n = getline(&buf, &n_allocated, f);
 535         if (n < 0) {
 536                 if (feof(f)) {
 537                         log_debug("%s is empty, we're in an uninitialized user namespace", name);
 538                         return true;
 539                 }
 540
 541                 return log_debug_errno(errno, "Failed to read %s: %m", name);
 542         }
 543
 544         r = sscanf(buf, "%"PRIu32" %"PRIu32" %"PRIu32, &a, &b, &c);
 545         if (r < 3)
 546                 return log_debug_errno(errno, "Failed to parse %s: %m", name);
 547
 548         if (a == 0 && b == 0 && c == UINT32_MAX) {
 549                 /* The kernel calls mappings_overlap() and does not allow overlaps */
 550                 log_debug("%s has a full 1:1 mapping", name);
 551                 return false;
 552         }
 553
 554         /* Anything else implies that we are in a user namespace */
 555         log_debug("Mapping found in %s, we're in a user namespace", name);
 556         return true;
 557 }
 558
 559 int running_in_userns(void) {
 560         _cleanup_free_ char *line = NULL;
 561         int r;
 562
 563         r = userns_has_mapping("/proc/self/uid_map");
 564         if (r != 0)
 565                 return r;
 566
 567         r = userns_has_mapping("/proc/self/gid_map");
 568         if (r != 0)
 569                 return r;
 570
 571         /* "setgroups" file was added in kernel v3.18-rc6-15-g9cc46516dd. It is also
 572          * possible to compile a kernel without CONFIG_USER_NS, in which case "setgroups"
 573          * also does not exist. We cannot distinguish those two cases, so assume that
 574          * we're running on a stripped-down recent kernel, rather than on an old one,
 575          * and if the file is not found, return false.
 576          */
 577         r = read_one_line_file("/proc/self/setgroups", &line);
 578         if (r < 0) {
 579                 log_debug_errno(r, "/proc/self/setgroups: %m");
 580                 return r == -ENOENT ? false : r;
 581         }
 582
 583         truncate_nl(line);
 584         r = streq(line, "deny");
 585         /* See user_namespaces(7) for a description of this "setgroups" contents. */
 586         log_debug("/proc/self/setgroups contains \"%s\", %s user namespace", line, r ? "in" : "not in");
 587         return r;
 588 }
 589 #endif // 0
 590
 591 int running_in_chroot(void) {
 592         int r;
 593
 594 #if 0 /// elogind does not allow to ignore chroots, we are never init!
 595         if (getenv_bool("SYSTEMD_IGNORE_CHROOT") > 0)
 596                 return 0;
 597 #endif // 0
 598
 599         r = files_same("/proc/1/root", "/", 0);
 600         if (r < 0)
 601                 return r;
 602
 603         return r == 0;
 604 }
 605
 606 static const char *const virtualization_table[_VIRTUALIZATION_MAX] = {
 607         [VIRTUALIZATION_NONE] = "none",
 608         [VIRTUALIZATION_KVM] = "kvm",
 609         [VIRTUALIZATION_QEMU] = "qemu",
 610         [VIRTUALIZATION_BOCHS] = "bochs",
 611         [VIRTUALIZATION_XEN] = "xen",
 612         [VIRTUALIZATION_UML] = "uml",
 613         [VIRTUALIZATION_VMWARE] = "vmware",
 614         [VIRTUALIZATION_ORACLE] = "oracle",
 615         [VIRTUALIZATION_MICROSOFT] = "microsoft",
 616         [VIRTUALIZATION_ZVM] = "zvm",
 617         [VIRTUALIZATION_PARALLELS] = "parallels",
 618         [VIRTUALIZATION_BHYVE] = "bhyve",
 619         [VIRTUALIZATION_QNX] = "qnx",
 620         [VIRTUALIZATION_VM_OTHER] = "vm-other",
 621
 622         [VIRTUALIZATION_SYSTEMD_NSPAWN] = "systemd-nspawn",
 623         [VIRTUALIZATION_LXC_LIBVIRT] = "lxc-libvirt",
 624         [VIRTUALIZATION_LXC] = "lxc",
 625         [VIRTUALIZATION_OPENVZ] = "openvz",
 626         [VIRTUALIZATION_DOCKER] = "docker",
 627         [VIRTUALIZATION_RKT] = "rkt",
 628         [VIRTUALIZATION_CONTAINER_OTHER] = "container-other",
 629 };
 630
 631 DEFINE_STRING_TABLE_LOOKUP(virtualization, int);