src/basic/virt.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2011 Lennart Poettering
   6 ***/
   7
   8 #if defined(__i386__) || defined(__x86_64__)
   9 //#include <cpuid.h>
  10 #endif
  11 #include <errno.h>
  12 #include <stdint.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <unistd.h>
  16
  17 #include "alloc-util.h"
  18 #include "dirent-util.h"
  19 #include "env-util.h"
  20 #include "fd-util.h"
  21 #include "fileio.h"
  22 #include "macro.h"
  23 #include "process-util.h"
  24 #include "stat-util.h"
  25 #include "string-table.h"
  26 #include "string-util.h"
  27 #include "virt.h"
  28
  29 #if 0 /// UNNEEDED by elogind
  30 static int detect_vm_cpuid(void) {
  31
  32         /* CPUID is an x86 specific interface. */
  33 #if defined(__i386__) || defined(__x86_64__)
  34
  35         static const struct {
  36                 const char *cpuid;
  37                 int id;
  38         } cpuid_vendor_table[] = {
  39                 { "XenVMMXenVMM", VIRTUALIZATION_XEN       },
  40                 { "KVMKVMKVM",    VIRTUALIZATION_KVM       },
  41                 { "TCGTCGTCGTCG", VIRTUALIZATION_QEMU      },
  42                 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
  43                 { "VMwareVMware", VIRTUALIZATION_VMWARE    },
  44                 /* https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs */
  45                 { "Microsoft Hv", VIRTUALIZATION_MICROSOFT },
  46                 /* https://wiki.freebsd.org/bhyve */
  47                 { "bhyve bhyve ", VIRTUALIZATION_BHYVE     },
  48                 { "QNXQVMBSQG",   VIRTUALIZATION_QNX       },
  49         };
  50
  51         uint32_t eax, ebx, ecx, edx;
  52         bool hypervisor;
  53
  54         /* http://lwn.net/Articles/301888/ */
  55
  56         /* First detect whether there is a hypervisor */
  57         if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) == 0)
  58                 return VIRTUALIZATION_NONE;
  59
  60         hypervisor = !!(ecx & 0x80000000U);
  61
  62         if (hypervisor) {
  63                 union {
  64                         uint32_t sig32[3];
  65                         char text[13];
  66                 } sig = {};
  67                 unsigned j;
  68
  69                 /* There is a hypervisor, see what it is */
  70                 __cpuid(0x40000000U, eax, ebx, ecx, edx);
  71
  72                 sig.sig32[0] = ebx;
  73                 sig.sig32[1] = ecx;
  74                 sig.sig32[2] = edx;
  75
  76                 log_debug("Virtualization found, CPUID=%s", sig.text);
  77
  78                 for (j = 0; j < ELEMENTSOF(cpuid_vendor_table); j ++)
  79                         if (streq(sig.text, cpuid_vendor_table[j].cpuid))
  80                                 return cpuid_vendor_table[j].id;
  81
  82                 return VIRTUALIZATION_VM_OTHER;
  83         }
  84 #endif
  85         log_debug("No virtualization found in CPUID");
  86
  87         return VIRTUALIZATION_NONE;
  88 }
  89
  90 static int detect_vm_device_tree(void) {
  91 #if defined(__arm__) || defined(__aarch64__) || defined(__powerpc__) || defined(__powerpc64__)
  92         _cleanup_free_ char *hvtype = NULL;
  93         int r;
  94
  95         r = read_one_line_file("/proc/device-tree/hypervisor/compatible", &hvtype);
  96         if (r == -ENOENT) {
  97                 _cleanup_closedir_ DIR *dir = NULL;
  98                 struct dirent *dent;
  99
 100                 dir = opendir("/proc/device-tree");
 101                 if (!dir) {
 102                         if (errno == ENOENT) {
 103                                 log_debug_errno(errno, "/proc/device-tree: %m");
 104                                 return VIRTUALIZATION_NONE;
 105                         }
 106                         return -errno;
 107                 }
 108
 109                 FOREACH_DIRENT(dent, dir, return -errno)
 110                         if (strstr(dent->d_name, "fw-cfg")) {
 111                                 log_debug("Virtualization QEMU: \"fw-cfg\" present in /proc/device-tree/%s", dent->d_name);
 112                                 return VIRTUALIZATION_QEMU;
 113                         }
 114
 115                 log_debug("No virtualization found in /proc/device-tree/*");
 116                 return VIRTUALIZATION_NONE;
 117         } else if (r < 0)
 118                 return r;
 119
 120         log_debug("Virtualization %s found in /proc/device-tree/hypervisor/compatible", hvtype);
 121         if (streq(hvtype, "linux,kvm"))
 122                 return VIRTUALIZATION_KVM;
 123         else if (strstr(hvtype, "xen"))
 124                 return VIRTUALIZATION_XEN;
 125         else
 126                 return VIRTUALIZATION_VM_OTHER;
 127 #else
 128         log_debug("This platform does not support /proc/device-tree");
 129         return VIRTUALIZATION_NONE;
 130 #endif
 131 }
 132
 133 static int detect_vm_dmi(void) {
 134 #if defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
 135
 136         static const char *const dmi_vendors[] = {
 137                 "/sys/class/dmi/id/product_name", /* Test this before sys_vendor to detect KVM over QEMU */
 138                 "/sys/class/dmi/id/sys_vendor",
 139                 "/sys/class/dmi/id/board_vendor",
 140                 "/sys/class/dmi/id/bios_vendor"
 141         };
 142
 143         static const struct {
 144                 const char *vendor;
 145                 int id;
 146         } dmi_vendor_table[] = {
 147                 { "KVM",           VIRTUALIZATION_KVM       },
 148                 { "QEMU",          VIRTUALIZATION_QEMU      },
 149                 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
 150                 { "VMware",        VIRTUALIZATION_VMWARE    },
 151                 { "VMW",           VIRTUALIZATION_VMWARE    },
 152                 { "innotek GmbH",  VIRTUALIZATION_ORACLE    },
 153                 { "Xen",           VIRTUALIZATION_XEN       },
 154                 { "Bochs",         VIRTUALIZATION_BOCHS     },
 155                 { "Parallels",     VIRTUALIZATION_PARALLELS },
 156                 /* https://wiki.freebsd.org/bhyve */
 157                 { "BHYVE",         VIRTUALIZATION_BHYVE     },
 158         };
 159         unsigned i;
 160         int r;
 161
 162         for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
 163                 _cleanup_free_ char *s = NULL;
 164                 unsigned j;
 165
 166                 r = read_one_line_file(dmi_vendors[i], &s);
 167                 if (r < 0) {
 168                         if (r == -ENOENT)
 169                                 continue;
 170
 171                         return r;
 172                 }
 173
 174                 for (j = 0; j < ELEMENTSOF(dmi_vendor_table); j++)
 175                         if (startswith(s, dmi_vendor_table[j].vendor)) {
 176                                 log_debug("Virtualization %s found in DMI (%s)", s, dmi_vendors[i]);
 177                                 return dmi_vendor_table[j].id;
 178                         }
 179         }
 180 #endif
 181
 182         log_debug("No virtualization found in DMI");
 183
 184         return VIRTUALIZATION_NONE;
 185 }
 186
 187 static int detect_vm_xen(void) {
 188
 189         /* Check for Dom0 will be executed later in detect_vm_xen_dom0
 190            The presence of /proc/xen indicates some form of a Xen domain */
 191         if (access("/proc/xen", F_OK) < 0) {
 192                 log_debug("Virtualization XEN not found, /proc/xen does not exist");
 193                 return VIRTUALIZATION_NONE;
 194         }
 195
 196         log_debug("Virtualization XEN found (/proc/xen exists)");
 197         return VIRTUALIZATION_XEN;
 198 }
 199
 200 #define XENFEAT_dom0 11 /* xen/include/public/features.h */
 201 #define PATH_FEATURES "/sys/hypervisor/properties/features"
 202 /* Returns -errno, or 0 for domU, or 1 for dom0 */
 203 static int detect_vm_xen_dom0(void) {
 204         _cleanup_free_ char *domcap = NULL;
 205         char *cap, *i;
 206         int r;
 207
 208         r = read_one_line_file(PATH_FEATURES, &domcap);
 209         if (r < 0 && r != -ENOENT)
 210                 return r;
 211         if (r == 0) {
 212                 unsigned long features;
 213
 214                 /* Here, we need to use sscanf() instead of safe_atoul()
 215                  * as the string lacks the leading "0x". */
 216                 r = sscanf(domcap, "%lx", &features);
 217                 if (r == 1) {
 218                         r = !!(features & (1U << XENFEAT_dom0));
 219                         log_debug("Virtualization XEN, found %s with value %08lx, "
 220                                   "XENFEAT_dom0 (indicating the 'hardware domain') is%s set.",
 221                                   PATH_FEATURES, features, r ? "" : " not");
 222                         return r;
 223                 }
 224                 log_debug("Virtualization XEN, found %s, unhandled content '%s'",
 225                           PATH_FEATURES, domcap);
 226         }
 227
 228         r = read_one_line_file("/proc/xen/capabilities", &domcap);
 229         if (r == -ENOENT) {
 230                 log_debug("Virtualization XEN because /proc/xen/capabilities does not exist");
 231                 return 0;
 232         }
 233         if (r < 0)
 234                 return r;
 235
 236         i = domcap;
 237         while ((cap = strsep(&i, ",")))
 238                 if (streq(cap, "control_d"))
 239                         break;
 240         if (!cap) {
 241                 log_debug("Virtualization XEN DomU found (/proc/xen/capabilites)");
 242                 return 0;
 243         }
 244
 245         log_debug("Virtualization XEN Dom0 ignored (/proc/xen/capabilities)");
 246         return 1;
 247 }
 248
 249 static int detect_vm_hypervisor(void) {
 250         _cleanup_free_ char *hvtype = NULL;
 251         int r;
 252
 253         r = read_one_line_file("/sys/hypervisor/type", &hvtype);
 254         if (r == -ENOENT)
 255                 return VIRTUALIZATION_NONE;
 256         if (r < 0)
 257                 return r;
 258
 259         log_debug("Virtualization %s found in /sys/hypervisor/type", hvtype);
 260
 261         if (streq(hvtype, "xen"))
 262                 return VIRTUALIZATION_XEN;
 263         else
 264                 return VIRTUALIZATION_VM_OTHER;
 265 }
 266
 267 static int detect_vm_uml(void) {
 268         _cleanup_free_ char *cpuinfo_contents = NULL;
 269         int r;
 270
 271         /* Detect User-Mode Linux by reading /proc/cpuinfo */
 272         r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL);
 273         if (r == -ENOENT) {
 274                 log_debug("/proc/cpuinfo not found, assuming no UML virtualization.");
 275                 return VIRTUALIZATION_NONE;
 276         }
 277         if (r < 0)
 278                 return r;
 279
 280         if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n")) {
 281                 log_debug("UML virtualization found in /proc/cpuinfo");
 282                 return VIRTUALIZATION_UML;
 283         }
 284
 285         log_debug("UML virtualization not found in /proc/cpuinfo.");
 286         return VIRTUALIZATION_NONE;
 287 }
 288
 289 static int detect_vm_zvm(void) {
 290
 291 #if defined(__s390__)
 292         _cleanup_free_ char *t = NULL;
 293         int r;
 294
 295         r = get_proc_field("/proc/sysinfo", "VM00 Control Program", WHITESPACE, &t);
 296         if (r == -ENOENT)
 297                 return VIRTUALIZATION_NONE;
 298         if (r < 0)
 299                 return r;
 300
 301         log_debug("Virtualization %s found in /proc/sysinfo", t);
 302         if (streq(t, "z/VM"))
 303                 return VIRTUALIZATION_ZVM;
 304         else
 305                 return VIRTUALIZATION_KVM;
 306 #else
 307         log_debug("This platform does not support /proc/sysinfo");
 308         return VIRTUALIZATION_NONE;
 309 #endif
 310 }
 311
 312 /* Returns a short identifier for the various VM implementations */
 313 int detect_vm(void) {
 314         static thread_local int cached_found = _VIRTUALIZATION_INVALID;
 315         int r, dmi;
 316         bool other = false;
 317
 318         if (cached_found >= 0)
 319                 return cached_found;
 320
 321         /* We have to use the correct order here:
 322          *
 323          * -> First try to detect Oracle Virtualbox, even if it uses KVM.
 324          * -> Second try to detect from cpuid, this will report KVM for
 325          *    whatever software is used even if info in dmi is overwritten.
 326          * -> Third try to detect from dmi. */
 327
 328         dmi = detect_vm_dmi();
 329         if (dmi == VIRTUALIZATION_ORACLE) {
 330                 r = dmi;
 331                 goto finish;
 332         }
 333
 334         r = detect_vm_cpuid();
 335         if (r < 0)
 336                 return r;
 337         if (r != VIRTUALIZATION_NONE) {
 338                 if (r == VIRTUALIZATION_VM_OTHER)
 339                         other = true;
 340                 else
 341                         goto finish;
 342         }
 343
 344         r = dmi;
 345         if (r < 0)
 346                 return r;
 347         if (r != VIRTUALIZATION_NONE) {
 348                 if (r == VIRTUALIZATION_VM_OTHER)
 349                         other = true;
 350                 else
 351                         goto finish;
 352         }
 353
 354         /* x86 xen will most likely be detected by cpuid. If not (most likely
 355          * because we're not an x86 guest), then we should try the /proc/xen
 356          * directory next. If that's not found, then we check for the high-level
 357          * hypervisor sysfs file.
 358          */
 359
 360         r = detect_vm_xen();
 361         if (r < 0)
 362                 return r;
 363         if (r != VIRTUALIZATION_NONE) {
 364                 if (r == VIRTUALIZATION_VM_OTHER)
 365                         other = true;
 366                 else
 367                         goto finish;
 368         }
 369
 370         r = detect_vm_hypervisor();
 371         if (r < 0)
 372                 return r;
 373         if (r != VIRTUALIZATION_NONE) {
 374                 if (r == VIRTUALIZATION_VM_OTHER)
 375                         other = true;
 376                 else
 377                         goto finish;
 378         }
 379
 380         r = detect_vm_device_tree();
 381         if (r < 0)
 382                 return r;
 383         if (r != VIRTUALIZATION_NONE) {
 384                 if (r == VIRTUALIZATION_VM_OTHER)
 385                         other = true;
 386                 else
 387                         goto finish;
 388         }
 389
 390         r = detect_vm_uml();
 391         if (r < 0)
 392                 return r;
 393         if (r != VIRTUALIZATION_NONE) {
 394                 if (r == VIRTUALIZATION_VM_OTHER)
 395                         other = true;
 396                 else
 397                         goto finish;
 398         }
 399
 400         r = detect_vm_zvm();
 401         if (r < 0)
 402                 return r;
 403
 404 finish:
 405         /* x86 xen Dom0 is detected as XEN in hypervisor and maybe others.
 406          * In order to detect the Dom0 as not virtualization we need to
 407          * double-check it */
 408         if (r == VIRTUALIZATION_XEN) {
 409                 int ret = detect_vm_xen_dom0();
 410                 if (ret < 0)
 411                         return ret;
 412                 if (ret > 0)
 413                         r = VIRTUALIZATION_NONE;
 414         } else if (r == VIRTUALIZATION_NONE && other)
 415                 r = VIRTUALIZATION_VM_OTHER;
 416
 417         cached_found = r;
 418         log_debug("Found VM virtualization %s", virtualization_to_string(r));
 419         return r;
 420 }
 421 #endif // 0
 422
 423 int detect_container(void) {
 424
 425         static const struct {
 426                 const char *value;
 427                 int id;
 428         } value_table[] = {
 429                 { "lxc",            VIRTUALIZATION_LXC            },
 430                 { "lxc-libvirt",    VIRTUALIZATION_LXC_LIBVIRT    },
 431                 { "systemd-nspawn", VIRTUALIZATION_SYSTEMD_NSPAWN },
 432                 { "docker",         VIRTUALIZATION_DOCKER         },
 433                 { "rkt",            VIRTUALIZATION_RKT            },
 434         };
 435
 436         static thread_local int cached_found = _VIRTUALIZATION_INVALID;
 437         _cleanup_free_ char *m = NULL;
 438         const char *e = NULL;
 439         unsigned j;
 440         int r;
 441
 442         if (cached_found >= 0)
 443                 return cached_found;
 444
 445         /* /proc/vz exists in container and outside of the container, /proc/bc only outside of the container. */
 446         if (access("/proc/vz", F_OK) >= 0 &&
 447             access("/proc/bc", F_OK) < 0) {
 448                 r = VIRTUALIZATION_OPENVZ;
 449                 goto finish;
 450         }
 451
 452         if (getpid_cached() == 1) {
 453                 /* If we are PID 1 we can just check our own environment variable, and that's authoritative. */
 454
 455                 e = getenv("container");
 456                 if (isempty(e)) {
 457                         r = VIRTUALIZATION_NONE;
 458                         goto finish;
 459                 }
 460
 461                 goto translate_name;
 462         }
 463
 464         /* Otherwise, PID 1 might have dropped this information into a file in /run. This is better than accessing
 465          * /proc/1/environ, since we don't need CAP_SYS_PTRACE for that. */
 466         r = read_one_line_file("/run/systemd/container", &m);
 467         if (r >= 0) {
 468                 e = m;
 469                 goto translate_name;
 470         }
 471         if (r != -ENOENT)
 472                 return log_debug_errno(r, "Failed to read /run/systemd/container: %m");
 473
 474         /* Fallback for cases where PID 1 was not systemd (for example, cases where init=/bin/sh is used. */
 475         r = getenv_for_pid(1, "container", &m);
 476         if (r > 0) {
 477                 e = m;
 478                 goto translate_name;
 479         }
 480         if (r < 0) /* This only works if we have CAP_SYS_PTRACE, hence let's better ignore failures here */
 481                 log_debug_errno(r, "Failed to read $container of PID 1, ignoring: %m");
 482
 483         /* Interestingly /proc/1/sched actually shows the host's PID for what we see as PID 1. Hence, if the PID shown
 484          * there is not 1, we know we are in a PID namespace. and hence a container. */
 485         r = read_one_line_file("/proc/1/sched", &m);
 486         if (r >= 0) {
 487                 const char *t;
 488
 489                 t = strrchr(m, '(');
 490                 if (!t)
 491                         return -EIO;
 492
 493                 if (!startswith(t, "(1,")) {
 494                         r = VIRTUALIZATION_CONTAINER_OTHER;
 495                         goto finish;
 496                 }
 497         } else if (r != -ENOENT)
 498                 return r;
 499
 500         /* If that didn't work, give up, assume no container manager. */
 501         r = VIRTUALIZATION_NONE;
 502         goto finish;
 503
 504 translate_name:
 505         for (j = 0; j < ELEMENTSOF(value_table); j++)
 506                 if (streq(e, value_table[j].value)) {
 507                         r = value_table[j].id;
 508                         goto finish;
 509                 }
 510
 511         r = VIRTUALIZATION_CONTAINER_OTHER;
 512
 513 finish:
 514         log_debug("Found container virtualization %s.", virtualization_to_string(r));
 515         cached_found = r;
 516         return r;
 517 }
 518
 519 #if 0 /// UNNEEDED by elogind
 520 int detect_virtualization(void) {
 521         int r;
 522
 523         r = detect_container();
 524         if (r == 0)
 525                 r = detect_vm();
 526
 527         return r;
 528 }
 529
 530 static int userns_has_mapping(const char *name) {
 531         _cleanup_fclose_ FILE *f = NULL;
 532         _cleanup_free_ char *buf = NULL;
 533         size_t n_allocated = 0;
 534         ssize_t n;
 535         uint32_t a, b, c;
 536         int r;
 537
 538         f = fopen(name, "re");
 539         if (!f) {
 540                 log_debug_errno(errno, "Failed to open %s: %m", name);
 541                 return errno == ENOENT ? false : -errno;
 542         }
 543
 544         n = getline(&buf, &n_allocated, f);
 545         if (n < 0) {
 546                 if (feof(f)) {
 547                         log_debug("%s is empty, we're in an uninitialized user namespace", name);
 548                         return true;
 549                 }
 550
 551                 return log_debug_errno(errno, "Failed to read %s: %m", name);
 552         }
 553
 554         r = sscanf(buf, "%"PRIu32" %"PRIu32" %"PRIu32, &a, &b, &c);
 555         if (r < 3)
 556                 return log_debug_errno(errno, "Failed to parse %s: %m", name);
 557
 558         if (a == 0 && b == 0 && c == UINT32_MAX) {
 559                 /* The kernel calls mappings_overlap() and does not allow overlaps */
 560                 log_debug("%s has a full 1:1 mapping", name);
 561                 return false;
 562         }
 563
 564         /* Anything else implies that we are in a user namespace */
 565         log_debug("Mapping found in %s, we're in a user namespace", name);
 566         return true;
 567 }
 568
 569 int running_in_userns(void) {
 570         _cleanup_free_ char *line = NULL;
 571         int r;
 572
 573         r = userns_has_mapping("/proc/self/uid_map");
 574         if (r != 0)
 575                 return r;
 576
 577         r = userns_has_mapping("/proc/self/gid_map");
 578         if (r != 0)
 579                 return r;
 580
 581         /* "setgroups" file was added in kernel v3.18-rc6-15-g9cc46516dd. It is also
 582          * possible to compile a kernel without CONFIG_USER_NS, in which case "setgroups"
 583          * also does not exist. We cannot distinguish those two cases, so assume that
 584          * we're running on a stripped-down recent kernel, rather than on an old one,
 585          * and if the file is not found, return false.
 586          */
 587         r = read_one_line_file("/proc/self/setgroups", &line);
 588         if (r < 0) {
 589                 log_debug_errno(r, "/proc/self/setgroups: %m");
 590                 return r == -ENOENT ? false : r;
 591         }
 592
 593         truncate_nl(line);
 594         r = streq(line, "deny");
 595         /* See user_namespaces(7) for a description of this "setgroups" contents. */
 596         log_debug("/proc/self/setgroups contains \"%s\", %s user namespace", line, r ? "in" : "not in");
 597         return r;
 598 }
 599 #endif // 0
 600
 601 int running_in_chroot(void) {
 602         int r;
 603
 604 #if 0 /// elogind does not allow to ignore chroots, we are never init!
 605         if (getenv_bool("SYSTEMD_IGNORE_CHROOT") > 0)
 606                 return 0;
 607 #endif // 0
 608
 609         r = files_same("/proc/1/root", "/", 0);
 610         if (r < 0)
 611                 return r;
 612
 613         return r == 0;
 614 }
 615
 616 static const char *const virtualization_table[_VIRTUALIZATION_MAX] = {
 617         [VIRTUALIZATION_NONE] = "none",
 618         [VIRTUALIZATION_KVM] = "kvm",
 619         [VIRTUALIZATION_QEMU] = "qemu",
 620         [VIRTUALIZATION_BOCHS] = "bochs",
 621         [VIRTUALIZATION_XEN] = "xen",
 622         [VIRTUALIZATION_UML] = "uml",
 623         [VIRTUALIZATION_VMWARE] = "vmware",
 624         [VIRTUALIZATION_ORACLE] = "oracle",
 625         [VIRTUALIZATION_MICROSOFT] = "microsoft",
 626         [VIRTUALIZATION_ZVM] = "zvm",
 627         [VIRTUALIZATION_PARALLELS] = "parallels",
 628         [VIRTUALIZATION_BHYVE] = "bhyve",
 629         [VIRTUALIZATION_QNX] = "qnx",
 630         [VIRTUALIZATION_VM_OTHER] = "vm-other",
 631
 632         [VIRTUALIZATION_SYSTEMD_NSPAWN] = "systemd-nspawn",
 633         [VIRTUALIZATION_LXC_LIBVIRT] = "lxc-libvirt",
 634         [VIRTUALIZATION_LXC] = "lxc",
 635         [VIRTUALIZATION_OPENVZ] = "openvz",
 636         [VIRTUALIZATION_DOCKER] = "docker",
 637         [VIRTUALIZATION_RKT] = "rkt",
 638         [VIRTUALIZATION_CONTAINER_OTHER] = "container-other",
 639 };
 640
 641 DEFINE_STRING_TABLE_LOOKUP(virtualization, int);