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