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