src/basic/virt.c

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