src/udev/udev-builtin-net_id.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2012 Kay Sievers <kay@vrfy.org>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 /*
  21  * Predictable network interface device names based on:
  22  *  - firmware/bios-provided index numbers for on-board devices
  23  *  - firmware-provided pci-express hotplug slot index number
  24  *  - physical/geographical location of the hardware
  25  *  - the interface's MAC address
  26  *
  27  * http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames
  28  *
  29  * Two character prefixes based on the type of interface:
  30  *   en — Ethernet
  31  *   sl — serial line IP (slip)
  32  *   wl — wlan
  33  *   ww — wwan
  34  *
  35  * Type of names:
  36  *   b<number>                             — BCMA bus core number
  37  *   c<bus_id>                             — bus id of a grouped CCW or CCW device,
  38  *                                           with all leading zeros stripped [s390]
  39  *   o<index>[n<phys_port_name>|d<dev_port>]
  40  *                                         — on-board device index number
  41  *   s<slot>[f<function>][n<phys_port_name>|d<dev_port>]
  42  *                                         — hotplug slot index number
  43  *   x<MAC>                                — MAC address
  44  *   [P<domain>]p<bus>s<slot>[f<function>][n<phys_port_name>|d<dev_port>]
  45  *                                         — PCI geographical location
  46  *   [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
  47  *                                         — USB port number chain
  48  *   v<slot>                               - VIO slot number (IBM PowerVM)
  49  *
  50  * All multi-function PCI devices will carry the [f<function>] number in the
  51  * device name, including the function 0 device.
  52  *
  53  * When using PCI geography, The PCI domain is only prepended when it is not 0.
  54  *
  55  * For USB devices the full chain of port numbers of hubs is composed. If the
  56  * name gets longer than the maximum number of 15 characters, the name is not
  57  * exported.
  58  * The usual USB configuration == 1 and interface == 0 values are suppressed.
  59  *
  60  * PCI Ethernet card with firmware index "1":
  61  *   ID_NET_NAME_ONBOARD=eno1
  62  *   ID_NET_NAME_ONBOARD_LABEL=Ethernet Port 1
  63  *
  64  * PCI Ethernet card in hotplug slot with firmware index number:
  65  *   /sys/devices/pci0000:00/0000:00:1c.3/0000:05:00.0/net/ens1
  66  *   ID_NET_NAME_MAC=enx000000000466
  67  *   ID_NET_NAME_PATH=enp5s0
  68  *   ID_NET_NAME_SLOT=ens1
  69  *
  70  * PCI Ethernet multi-function card with 2 ports:
  71  *   /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/net/enp2s0f0
  72  *   ID_NET_NAME_MAC=enx78e7d1ea46da
  73  *   ID_NET_NAME_PATH=enp2s0f0
  74  *   /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.1/net/enp2s0f1
  75  *   ID_NET_NAME_MAC=enx78e7d1ea46dc
  76  *   ID_NET_NAME_PATH=enp2s0f1
  77  *
  78  * PCI wlan card:
  79  *   /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlp3s0
  80  *   ID_NET_NAME_MAC=wlx0024d7e31130
  81  *   ID_NET_NAME_PATH=wlp3s0
  82  *
  83  * USB built-in 3G modem:
  84  *   /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.6/net/wwp0s29u1u4i6
  85  *   ID_NET_NAME_MAC=wwx028037ec0200
  86  *   ID_NET_NAME_PATH=wwp0s29u1u4i6
  87  *
  88  * USB Android phone:
  89  *   /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/net/enp0s29u1u2
  90  *   ID_NET_NAME_MAC=enxd626b3450fb5
  91  *   ID_NET_NAME_PATH=enp0s29u1u2
  92  *
  93  * s390 grouped CCW interface:
  94  *  /sys/devices/css0/0.0.0007/0.0.f5f0/group_device/net/encf5f0
  95  *  ID_NET_NAME_MAC=enx026d3c00000a
  96  *  ID_NET_NAME_PATH=encf5f0
  97  */
  98
  99 #include <errno.h>
 100 #include <fcntl.h>
 101 #include <net/if.h>
 102 #include <net/if_arp.h>
 103 #include <stdarg.h>
 104 #include <stdio.h>
 105 #include <stdlib.h>
 106 #include <string.h>
 107 #include <unistd.h>
 108 #include <linux/pci_regs.h>
 109
 110 #include "dirent-util.h"
 111 #include "fd-util.h"
 112 #include "fileio.h"
 113 #include "stdio-util.h"
 114 #include "string-util.h"
 115 #include "udev.h"
 116
 117 #define ONBOARD_INDEX_MAX (16*1024-1)
 118
 119 enum netname_type{
 120         NET_UNDEF,
 121         NET_PCI,
 122         NET_USB,
 123         NET_BCMA,
 124         NET_VIRTIO,
 125         NET_CCW,
 126         NET_VIO,
 127 };
 128
 129 struct netnames {
 130         enum netname_type type;
 131
 132         uint8_t mac[6];
 133         bool mac_valid;
 134
 135         struct udev_device *pcidev;
 136         char pci_slot[IFNAMSIZ];
 137         char pci_path[IFNAMSIZ];
 138         char pci_onboard[IFNAMSIZ];
 139         const char *pci_onboard_label;
 140
 141         char usb_ports[IFNAMSIZ];
 142         char bcma_core[IFNAMSIZ];
 143         char ccw_busid[IFNAMSIZ];
 144         char vio_slot[IFNAMSIZ];
 145 };
 146
 147 /* skip intermediate virtio devices */
 148 static struct udev_device *skip_virtio(struct udev_device *dev) {
 149         struct udev_device *parent = dev;
 150
 151         /* there can only ever be one virtio bus per parent device, so we can
 152            safely ignore any virtio buses. see
 153            <http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html> */
 154         while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent)))
 155                 parent = udev_device_get_parent(parent);
 156         return parent;
 157 }
 158
 159 /* retrieve on-board index number and label from firmware */
 160 static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
 161         unsigned dev_port = 0;
 162         size_t l;
 163         char *s;
 164         const char *attr, *port_name;
 165         int idx;
 166
 167         /* ACPI _DSM  — device specific method for naming a PCI or PCI Express device */
 168         attr = udev_device_get_sysattr_value(names->pcidev, "acpi_index");
 169         /* SMBIOS type 41 — Onboard Devices Extended Information */
 170         if (!attr)
 171                 attr = udev_device_get_sysattr_value(names->pcidev, "index");
 172         if (!attr)
 173                 return -ENOENT;
 174
 175         idx = strtoul(attr, NULL, 0);
 176         if (idx <= 0)
 177                 return -EINVAL;
 178
 179         /* Some BIOSes report rubbish indexes that are excessively high (2^24-1 is an index VMware likes to report for
 180          * example). Let's define a cut-off where we don't consider the index reliable anymore. We pick some arbitrary
 181          * cut-off, which is somewhere beyond the realistic number of physical network interface a system might
 182          * have. Ideally the kernel would already filter his crap for us, but it doesn't currently. */
 183         if (idx > ONBOARD_INDEX_MAX)
 184                 return -ENOENT;
 185
 186         /* kernel provided port index for multiple ports on a single PCI function */
 187         attr = udev_device_get_sysattr_value(dev, "dev_port");
 188         if (attr)
 189                 dev_port = strtol(attr, NULL, 10);
 190
 191         /* kernel provided front panel port name for multiple port PCI device */
 192         port_name = udev_device_get_sysattr_value(dev, "phys_port_name");
 193
 194         s = names->pci_onboard;
 195         l = sizeof(names->pci_onboard);
 196         l = strpcpyf(&s, l, "o%d", idx);
 197         if (port_name)
 198                 l = strpcpyf(&s, l, "n%s", port_name);
 199         else if (dev_port > 0)
 200                 l = strpcpyf(&s, l, "d%d", dev_port);
 201         if (l == 0)
 202                 names->pci_onboard[0] = '\0';
 203
 204         names->pci_onboard_label = udev_device_get_sysattr_value(names->pcidev, "label");
 205
 206         return 0;
 207 }
 208
 209 /* read the 256 bytes PCI configuration space to check the multi-function bit */
 210 static bool is_pci_multifunction(struct udev_device *dev) {
 211         _cleanup_close_ int fd = -1;
 212         const char *filename;
 213         uint8_t config[64];
 214
 215         filename = strjoina(udev_device_get_syspath(dev), "/config");
 216         fd = open(filename, O_RDONLY | O_CLOEXEC);
 217         if (fd < 0)
 218                 return false;
 219         if (read(fd, &config, sizeof(config)) != sizeof(config))
 220                 return false;
 221
 222         /* bit 0-6 header type, bit 7 multi/single function device */
 223         if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
 224                 return true;
 225
 226         return false;
 227 }
 228
 229 static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
 230         struct udev *udev = udev_device_get_udev(names->pcidev);
 231         unsigned domain, bus, slot, func, dev_port = 0;
 232         size_t l;
 233         char *s;
 234         const char *attr, *port_name;
 235         struct udev_device *pci = NULL;
 236         char slots[PATH_MAX];
 237         _cleanup_closedir_ DIR *dir = NULL;
 238         struct dirent *dent;
 239         int hotplug_slot = 0, err = 0;
 240
 241         if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4)
 242                 return -ENOENT;
 243
 244         /* kernel provided port index for multiple ports on a single PCI function */
 245         attr = udev_device_get_sysattr_value(dev, "dev_port");
 246         if (attr)
 247                 dev_port = strtol(attr, NULL, 10);
 248
 249         /* kernel provided front panel port name for multiple port PCI device */
 250         port_name = udev_device_get_sysattr_value(dev, "phys_port_name");
 251
 252         /* compose a name based on the raw kernel's PCI bus, slot numbers */
 253         s = names->pci_path;
 254         l = sizeof(names->pci_path);
 255         if (domain > 0)
 256                 l = strpcpyf(&s, l, "P%u", domain);
 257         l = strpcpyf(&s, l, "p%us%u", bus, slot);
 258         if (func > 0 || is_pci_multifunction(names->pcidev))
 259                 l = strpcpyf(&s, l, "f%u", func);
 260         if (port_name)
 261                 l = strpcpyf(&s, l, "n%s", port_name);
 262         else if (dev_port > 0)
 263                 l = strpcpyf(&s, l, "d%u", dev_port);
 264         if (l == 0)
 265                 names->pci_path[0] = '\0';
 266
 267         /* ACPI _SUN  — slot user number */
 268         pci = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
 269         if (!pci) {
 270                 err = -ENOENT;
 271                 goto out;
 272         }
 273
 274         snprintf(slots, sizeof slots, "%s/slots", udev_device_get_syspath(pci));
 275         dir = opendir(slots);
 276         if (!dir) {
 277                 err = -errno;
 278                 goto out;
 279         }
 280
 281         FOREACH_DIRENT_ALL(dent, dir, break) {
 282                 int i;
 283                 char *rest, *address, str[PATH_MAX];
 284
 285                 if (dent->d_name[0] == '.')
 286                         continue;
 287                 i = strtol(dent->d_name, &rest, 10);
 288                 if (rest[0] != '\0')
 289                         continue;
 290                 if (i < 1)
 291                         continue;
 292
 293                 snprintf(str, sizeof str, "%s/%s/address", slots, dent->d_name);
 294                 if (read_one_line_file(str, &address) >= 0) {
 295                         /* match slot address with device by stripping the function */
 296                         if (strneq(address, udev_device_get_sysname(names->pcidev), strlen(address)))
 297                                 hotplug_slot = i;
 298                         free(address);
 299                 }
 300
 301                 if (hotplug_slot > 0)
 302                         break;
 303         }
 304
 305         if (hotplug_slot > 0) {
 306                 s = names->pci_slot;
 307                 l = sizeof(names->pci_slot);
 308                 if (domain > 0)
 309                         l = strpcpyf(&s, l, "P%d", domain);
 310                 l = strpcpyf(&s, l, "s%d", hotplug_slot);
 311                 if (func > 0 || is_pci_multifunction(names->pcidev))
 312                         l = strpcpyf(&s, l, "f%d", func);
 313                 if (port_name)
 314                         l = strpcpyf(&s, l, "n%s", port_name);
 315                 else if (dev_port > 0)
 316                         l = strpcpyf(&s, l, "d%d", dev_port);
 317                 if (l == 0)
 318                         names->pci_slot[0] = '\0';
 319         }
 320 out:
 321         udev_device_unref(pci);
 322         return err;
 323 }
 324
 325 static int names_vio(struct udev_device *dev, struct netnames *names) {
 326         struct udev_device *parent;
 327         unsigned busid, slotid, ethid;
 328         const char *syspath;
 329
 330         /* check if our direct parent is a VIO device with no other bus in-between */
 331         parent = udev_device_get_parent(dev);
 332         if (!parent)
 333                 return -ENOENT;
 334
 335         if (!streq_ptr("vio", udev_device_get_subsystem(parent)))
 336                  return -ENOENT;
 337
 338         /* The devices' $DEVPATH number is tied to (virtual) hardware (slot id
 339          * selected in the HMC), thus this provides a reliable naming (e.g.
 340          * "/devices/vio/30000002/net/eth1"); we ignore the bus number, as
 341          * there should only ever be one bus, and then remove leading zeros. */
 342         syspath = udev_device_get_syspath(dev);
 343
 344         if (sscanf(syspath, "/sys/devices/vio/%4x%4x/net/eth%u", &busid, &slotid, &ethid) != 3)
 345                 return -EINVAL;
 346
 347         xsprintf(names->vio_slot, "v%u", slotid);
 348         names->type = NET_VIO;
 349         return 0;
 350 }
 351
 352 static int names_pci(struct udev_device *dev, struct netnames *names) {
 353         struct udev_device *parent;
 354
 355         assert(dev);
 356         assert(names);
 357
 358         parent = udev_device_get_parent(dev);
 359         /* skip virtio subsystem if present */
 360         parent = skip_virtio(parent);
 361
 362         if (!parent)
 363                 return -ENOENT;
 364
 365         /* check if our direct parent is a PCI device with no other bus in-between */
 366         if (streq_ptr("pci", udev_device_get_subsystem(parent))) {
 367                 names->type = NET_PCI;
 368                 names->pcidev = parent;
 369         } else {
 370                 names->pcidev = udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
 371                 if (!names->pcidev)
 372                         return -ENOENT;
 373         }
 374         dev_pci_onboard(dev, names);
 375         dev_pci_slot(dev, names);
 376         return 0;
 377 }
 378
 379 static int names_usb(struct udev_device *dev, struct netnames *names) {
 380         struct udev_device *usbdev;
 381         char name[256];
 382         char *ports;
 383         char *config;
 384         char *interf;
 385         size_t l;
 386         char *s;
 387
 388         assert(dev);
 389         assert(names);
 390
 391         usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
 392         if (!usbdev)
 393                 return -ENOENT;
 394
 395         /* get USB port number chain, configuration, interface */
 396         strscpy(name, sizeof(name), udev_device_get_sysname(usbdev));
 397         s = strchr(name, '-');
 398         if (!s)
 399                 return -EINVAL;
 400         ports = s+1;
 401
 402         s = strchr(ports, ':');
 403         if (!s)
 404                 return -EINVAL;
 405         s[0] = '\0';
 406         config = s+1;
 407
 408         s = strchr(config, '.');
 409         if (!s)
 410                 return -EINVAL;
 411         s[0] = '\0';
 412         interf = s+1;
 413
 414         /* prefix every port number in the chain with "u" */
 415         s = ports;
 416         while ((s = strchr(s, '.')))
 417                 s[0] = 'u';
 418         s = names->usb_ports;
 419         l = strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL);
 420
 421         /* append USB config number, suppress the common config == 1 */
 422         if (!streq(config, "1"))
 423                 l = strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL);
 424
 425         /* append USB interface number, suppress the interface == 0 */
 426         if (!streq(interf, "0"))
 427                 l = strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL);
 428         if (l == 0)
 429                 return -ENAMETOOLONG;
 430
 431         names->type = NET_USB;
 432         return 0;
 433 }
 434
 435 static int names_bcma(struct udev_device *dev, struct netnames *names) {
 436         struct udev_device *bcmadev;
 437         unsigned int core;
 438
 439         assert(dev);
 440         assert(names);
 441
 442         bcmadev = udev_device_get_parent_with_subsystem_devtype(dev, "bcma", NULL);
 443         if (!bcmadev)
 444                 return -ENOENT;
 445
 446         /* bus num:core num */
 447         if (sscanf(udev_device_get_sysname(bcmadev), "bcma%*u:%u", &core) != 1)
 448                 return -EINVAL;
 449         /* suppress the common core == 0 */
 450         if (core > 0)
 451                 xsprintf(names->bcma_core, "b%u", core);
 452
 453         names->type = NET_BCMA;
 454         return 0;
 455 }
 456
 457 static int names_ccw(struct  udev_device *dev, struct netnames *names) {
 458         struct udev_device *cdev;
 459         const char *bus_id, *subsys;
 460         size_t bus_id_len;
 461         size_t bus_id_start;
 462         int rc;
 463
 464         assert(dev);
 465         assert(names);
 466
 467         /* Retrieve the associated CCW device */
 468         cdev = udev_device_get_parent(dev);
 469         /* skip virtio subsystem if present */
 470         cdev = skip_virtio(cdev);
 471         if (!cdev)
 472                 return -ENOENT;
 473
 474         /* Network devices are either single or grouped CCW devices */
 475         subsys = udev_device_get_subsystem(cdev);
 476         if (!STRPTR_IN_SET(subsys, "ccwgroup", "ccw"))
 477                 return -ENOENT;
 478
 479         /* Retrieve bus-ID of the CCW device.  The bus-ID uniquely
 480          * identifies the network device on the Linux on System z channel
 481          * subsystem.  Note that the bus-ID contains lowercase characters.
 482          */
 483         bus_id = udev_device_get_sysname(cdev);
 484         if (!bus_id)
 485                 return -ENOENT;
 486
 487         /* Check the length of the bus-ID.  Rely on that the kernel provides
 488          * a correct bus-ID; alternatively, improve this check and parse and
 489          * verify each bus-ID part...
 490          */
 491         bus_id_len = strlen(bus_id);
 492         if (!bus_id_len || bus_id_len < 8 || bus_id_len > 9)
 493                 return -EINVAL;
 494
 495         /* Strip leading zeros from the bus id for aesthetic purposes. This
 496          * keeps the ccw names stable, yet much shorter in general case of
 497          * bus_id 0.0.0600 -> 600. This is similar to e.g. how PCI domain is
 498          * not prepended when it is zero. Preserve the last 0 for 0.0.0000.
 499          */
 500         bus_id_start = strspn(bus_id, ".0");
 501         bus_id += bus_id_start < bus_id_len ? bus_id_start : bus_id_len - 1;
 502
 503         /* Store the CCW bus-ID for use as network device name */
 504         rc = snprintf(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id);
 505         if (rc >= 0 && rc < (int)sizeof(names->ccw_busid))
 506                 names->type = NET_CCW;
 507         return 0;
 508 }
 509
 510 static int names_mac(struct udev_device *dev, struct netnames *names) {
 511         const char *s;
 512         unsigned int i;
 513         unsigned int a1, a2, a3, a4, a5, a6;
 514
 515         /* check for NET_ADDR_PERM, skip random MAC addresses */
 516         s = udev_device_get_sysattr_value(dev, "addr_assign_type");
 517         if (!s)
 518                 return EXIT_FAILURE;
 519         i = strtoul(s, NULL, 0);
 520         if (i != 0)
 521                 return 0;
 522
 523         s = udev_device_get_sysattr_value(dev, "address");
 524         if (!s)
 525                 return -ENOENT;
 526         if (sscanf(s, "%x:%x:%x:%x:%x:%x", &a1, &a2, &a3, &a4, &a5, &a6) != 6)
 527                 return -EINVAL;
 528
 529         /* skip empty MAC addresses */
 530         if (a1 + a2 + a3 + a4 + a5 + a6 == 0)
 531                 return -EINVAL;
 532
 533         names->mac[0] = a1;
 534         names->mac[1] = a2;
 535         names->mac[2] = a3;
 536         names->mac[3] = a4;
 537         names->mac[4] = a5;
 538         names->mac[5] = a6;
 539         names->mac_valid = true;
 540         return 0;
 541 }
 542
 543 /* IEEE Organizationally Unique Identifier vendor string */
 544 static int ieee_oui(struct udev_device *dev, struct netnames *names, bool test) {
 545         char str[32];
 546
 547         if (!names->mac_valid)
 548                 return -ENOENT;
 549         /* skip commonly misused 00:00:00 (Xerox) prefix */
 550         if (memcmp(names->mac, "\0\0\0", 3) == 0)
 551                 return -EINVAL;
 552         xsprintf(str, "OUI:%02X%02X%02X%02X%02X%02X", names->mac[0],
 553                  names->mac[1], names->mac[2], names->mac[3], names->mac[4],
 554                  names->mac[5]);
 555         udev_builtin_hwdb_lookup(dev, NULL, str, NULL, test);
 556         return 0;
 557 }
 558
 559 static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) {
 560         const char *s;
 561         const char *p;
 562         unsigned int i;
 563         const char *devtype;
 564         const char *prefix = "en";
 565         struct netnames names = {};
 566         int err;
 567
 568         /* handle only ARPHRD_ETHER and ARPHRD_SLIP devices */
 569         s = udev_device_get_sysattr_value(dev, "type");
 570         if (!s)
 571                 return EXIT_FAILURE;
 572         i = strtoul(s, NULL, 0);
 573         switch (i) {
 574         case ARPHRD_ETHER:
 575                 prefix = "en";
 576                 break;
 577         case ARPHRD_SLIP:
 578                 prefix = "sl";
 579                 break;
 580         default:
 581                 return 0;
 582         }
 583
 584         /* skip stacked devices, like VLANs, ... */
 585         s = udev_device_get_sysattr_value(dev, "ifindex");
 586         if (!s)
 587                 return EXIT_FAILURE;
 588         p = udev_device_get_sysattr_value(dev, "iflink");
 589         if (!p)
 590                 return EXIT_FAILURE;
 591         if (!streq(s, p))
 592                 return 0;
 593
 594         devtype = udev_device_get_devtype(dev);
 595         if (devtype) {
 596                 if (streq("wlan", devtype))
 597                         prefix = "wl";
 598                 else if (streq("wwan", devtype))
 599                         prefix = "ww";
 600         }
 601
 602         err = names_mac(dev, &names);
 603         if (err >= 0 && names.mac_valid) {
 604                 char str[IFNAMSIZ];
 605
 606                 xsprintf(str, "%sx%02x%02x%02x%02x%02x%02x", prefix,
 607                          names.mac[0], names.mac[1], names.mac[2],
 608                          names.mac[3], names.mac[4], names.mac[5]);
 609                 udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str);
 610
 611                 ieee_oui(dev, &names, test);
 612         }
 613
 614         /* get path names for Linux on System z network devices */
 615         err = names_ccw(dev, &names);
 616         if (err >= 0 && names.type == NET_CCW) {
 617                 char str[IFNAMSIZ];
 618
 619                 if (snprintf(str, sizeof(str), "%s%s", prefix, names.ccw_busid) < (int)sizeof(str))
 620                         udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
 621                 goto out;
 622         }
 623
 624         /* get ibmveth/ibmvnic slot-based names. */
 625         err = names_vio(dev, &names);
 626         if (err >= 0 && names.type == NET_VIO) {
 627                 char str[IFNAMSIZ];
 628
 629                 if (snprintf(str, sizeof(str), "%s%s", prefix, names.vio_slot) < (int)sizeof(str))
 630                         udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
 631                 goto out;
 632         }
 633
 634         /* get PCI based path names, we compose only PCI based paths */
 635         err = names_pci(dev, &names);
 636         if (err < 0)
 637                 goto out;
 638
 639         /* plain PCI device */
 640         if (names.type == NET_PCI) {
 641                 char str[IFNAMSIZ];
 642
 643                 if (names.pci_onboard[0])
 644                         if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard) < (int)sizeof(str))
 645                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str);
 646
 647                 if (names.pci_onboard_label)
 648                         if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard_label) < (int)sizeof(str))
 649                                 udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str);
 650
 651                 if (names.pci_path[0])
 652                         if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_path) < (int)sizeof(str))
 653                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
 654
 655                 if (names.pci_slot[0])
 656                         if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_slot) < (int)sizeof(str))
 657                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
 658                 goto out;
 659         }
 660
 661         /* USB device */
 662         err = names_usb(dev, &names);
 663         if (err >= 0 && names.type == NET_USB) {
 664                 char str[IFNAMSIZ];
 665
 666                 if (names.pci_path[0])
 667                         if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.usb_ports) < (int)sizeof(str))
 668                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
 669
 670                 if (names.pci_slot[0])
 671                         if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.usb_ports) < (int)sizeof(str))
 672                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
 673                 goto out;
 674         }
 675
 676         /* Broadcom bus */
 677         err = names_bcma(dev, &names);
 678         if (err >= 0 && names.type == NET_BCMA) {
 679                 char str[IFNAMSIZ];
 680
 681                 if (names.pci_path[0])
 682                         if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.bcma_core) < (int)sizeof(str))
 683                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
 684
 685                 if (names.pci_slot[0])
 686                         if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.bcma_core) < (int)sizeof(str))
 687                                 udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
 688                 goto out;
 689         }
 690 out:
 691         return EXIT_SUCCESS;
 692 }
 693
 694 const struct udev_builtin udev_builtin_net_id = {
 695         .name = "net_id",
 696         .cmd = builtin_net_id,
 697         .help = "Network device properties",
 698 };