| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2012 Kay Sievers <kay@vrfy.org> |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| /* |
| * Predictable network interface device names based on: |
| * - firmware/bios-provided index numbers for on-board devices |
| * - firmware-provided pci-express hotplug slot index number |
| * - physical/geographical location of the hardware |
| * - the interface's MAC address |
| * |
| * http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames |
| * |
| * Two character prefixes based on the type of interface: |
| * en — Ethernet |
| * sl — serial line IP (slip) |
| * wl — wlan |
| * ww — wwan |
| * |
| * Type of names: |
| * b<number> — BCMA bus core number |
| * c<bus_id> — bus id of a grouped CCW or CCW device, |
| * with all leading zeros stripped [s390] |
| * o<index>[n<phys_port_name>|d<dev_port>] |
| * — on-board device index number |
| * s<slot>[f<function>][n<phys_port_name>|d<dev_port>] |
| * — hotplug slot index number |
| * x<MAC> — MAC address |
| * [P<domain>]p<bus>s<slot>[f<function>][n<phys_port_name>|d<dev_port>] |
| * — PCI geographical location |
| * [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>] |
| * — USB port number chain |
| * v<slot> - VIO slot number (IBM PowerVM) |
| * a<vendor><model>i<instance> — Platform bus ACPI instance id |
| * |
| * All multi-function PCI devices will carry the [f<function>] number in the |
| * device name, including the function 0 device. |
| * |
| * When using PCI geography, The PCI domain is only prepended when it is not 0. |
| * |
| * For USB devices the full chain of port numbers of hubs is composed. If the |
| * name gets longer than the maximum number of 15 characters, the name is not |
| * exported. |
| * The usual USB configuration == 1 and interface == 0 values are suppressed. |
| * |
| * PCI Ethernet card with firmware index "1": |
| * ID_NET_NAME_ONBOARD=eno1 |
| * ID_NET_NAME_ONBOARD_LABEL=Ethernet Port 1 |
| * |
| * PCI Ethernet card in hotplug slot with firmware index number: |
| * /sys/devices/pci0000:00/0000:00:1c.3/0000:05:00.0/net/ens1 |
| * ID_NET_NAME_MAC=enx000000000466 |
| * ID_NET_NAME_PATH=enp5s0 |
| * ID_NET_NAME_SLOT=ens1 |
| * |
| * PCI Ethernet multi-function card with 2 ports: |
| * /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/net/enp2s0f0 |
| * ID_NET_NAME_MAC=enx78e7d1ea46da |
| * ID_NET_NAME_PATH=enp2s0f0 |
| * /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.1/net/enp2s0f1 |
| * ID_NET_NAME_MAC=enx78e7d1ea46dc |
| * ID_NET_NAME_PATH=enp2s0f1 |
| * |
| * PCI wlan card: |
| * /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlp3s0 |
| * ID_NET_NAME_MAC=wlx0024d7e31130 |
| * ID_NET_NAME_PATH=wlp3s0 |
| * |
| * USB built-in 3G modem: |
| * /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.6/net/wwp0s29u1u4i6 |
| * ID_NET_NAME_MAC=wwx028037ec0200 |
| * ID_NET_NAME_PATH=wwp0s29u1u4i6 |
| * |
| * USB Android phone: |
| * /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/net/enp0s29u1u2 |
| * ID_NET_NAME_MAC=enxd626b3450fb5 |
| * ID_NET_NAME_PATH=enp0s29u1u2 |
| * |
| * s390 grouped CCW interface: |
| * /sys/devices/css0/0.0.0007/0.0.f5f0/group_device/net/encf5f0 |
| * ID_NET_NAME_MAC=enx026d3c00000a |
| * ID_NET_NAME_PATH=encf5f0 |
| */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <linux/pci_regs.h> |
| |
| #include "dirent-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "udev.h" |
| |
| #define ONBOARD_INDEX_MAX (16*1024-1) |
| |
| enum netname_type{ |
| NET_UNDEF, |
| NET_PCI, |
| NET_USB, |
| NET_BCMA, |
| NET_VIRTIO, |
| NET_CCW, |
| NET_VIO, |
| NET_PLATFORM, |
| }; |
| |
| struct netnames { |
| enum netname_type type; |
| |
| uint8_t mac[6]; |
| bool mac_valid; |
| |
| struct udev_device *pcidev; |
| char pci_slot[IFNAMSIZ]; |
| char pci_path[IFNAMSIZ]; |
| char pci_onboard[IFNAMSIZ]; |
| const char *pci_onboard_label; |
| |
| char usb_ports[IFNAMSIZ]; |
| char bcma_core[IFNAMSIZ]; |
| char ccw_busid[IFNAMSIZ]; |
| char vio_slot[IFNAMSIZ]; |
| char platform_path[IFNAMSIZ]; |
| }; |
| |
| /* skip intermediate virtio devices */ |
| static struct udev_device *skip_virtio(struct udev_device *dev) { |
| struct udev_device *parent = dev; |
| |
| /* there can only ever be one virtio bus per parent device, so we can |
| safely ignore any virtio buses. see |
| <http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html> */ |
| while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent))) |
| parent = udev_device_get_parent(parent); |
| return parent; |
| } |
| |
| /* retrieve on-board index number and label from firmware */ |
| static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) { |
| unsigned dev_port = 0; |
| size_t l; |
| char *s; |
| const char *attr, *port_name; |
| int idx; |
| |
| /* ACPI _DSM — device specific method for naming a PCI or PCI Express device */ |
| attr = udev_device_get_sysattr_value(names->pcidev, "acpi_index"); |
| /* SMBIOS type 41 — Onboard Devices Extended Information */ |
| if (!attr) |
| attr = udev_device_get_sysattr_value(names->pcidev, "index"); |
| if (!attr) |
| return -ENOENT; |
| |
| idx = strtoul(attr, NULL, 0); |
| if (idx <= 0) |
| return -EINVAL; |
| |
| /* Some BIOSes report rubbish indexes that are excessively high (2^24-1 is an index VMware likes to report for |
| * example). Let's define a cut-off where we don't consider the index reliable anymore. We pick some arbitrary |
| * cut-off, which is somewhere beyond the realistic number of physical network interface a system might |
| * have. Ideally the kernel would already filter his crap for us, but it doesn't currently. */ |
| if (idx > ONBOARD_INDEX_MAX) |
| return -ENOENT; |
| |
| /* kernel provided port index for multiple ports on a single PCI function */ |
| attr = udev_device_get_sysattr_value(dev, "dev_port"); |
| if (attr) |
| dev_port = strtol(attr, NULL, 10); |
| |
| /* kernel provided front panel port name for multiple port PCI device */ |
| port_name = udev_device_get_sysattr_value(dev, "phys_port_name"); |
| |
| s = names->pci_onboard; |
| l = sizeof(names->pci_onboard); |
| l = strpcpyf(&s, l, "o%d", idx); |
| if (port_name) |
| l = strpcpyf(&s, l, "n%s", port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%d", dev_port); |
| if (l == 0) |
| names->pci_onboard[0] = '\0'; |
| |
| names->pci_onboard_label = udev_device_get_sysattr_value(names->pcidev, "label"); |
| |
| return 0; |
| } |
| |
| /* read the 256 bytes PCI configuration space to check the multi-function bit */ |
| static bool is_pci_multifunction(struct udev_device *dev) { |
| _cleanup_close_ int fd = -1; |
| const char *filename; |
| uint8_t config[64]; |
| |
| filename = strjoina(udev_device_get_syspath(dev), "/config"); |
| fd = open(filename, O_RDONLY | O_CLOEXEC); |
| if (fd < 0) |
| return false; |
| if (read(fd, &config, sizeof(config)) != sizeof(config)) |
| return false; |
| |
| /* bit 0-6 header type, bit 7 multi/single function device */ |
| if ((config[PCI_HEADER_TYPE] & 0x80) != 0) |
| return true; |
| |
| return false; |
| } |
| |
| static int dev_pci_slot(struct udev_device *dev, struct netnames *names) { |
| struct udev *udev = udev_device_get_udev(names->pcidev); |
| unsigned domain, bus, slot, func, dev_port = 0; |
| size_t l; |
| char *s; |
| const char *attr, *port_name; |
| struct udev_device *pci = NULL; |
| char slots[PATH_MAX]; |
| _cleanup_closedir_ DIR *dir = NULL; |
| struct dirent *dent; |
| int hotplug_slot = 0, err = 0; |
| |
| if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4) |
| return -ENOENT; |
| |
| /* kernel provided port index for multiple ports on a single PCI function */ |
| attr = udev_device_get_sysattr_value(dev, "dev_port"); |
| if (attr) |
| dev_port = strtol(attr, NULL, 10); |
| |
| /* kernel provided front panel port name for multiple port PCI device */ |
| port_name = udev_device_get_sysattr_value(dev, "phys_port_name"); |
| |
| /* compose a name based on the raw kernel's PCI bus, slot numbers */ |
| s = names->pci_path; |
| l = sizeof(names->pci_path); |
| if (domain > 0) |
| l = strpcpyf(&s, l, "P%u", domain); |
| l = strpcpyf(&s, l, "p%us%u", bus, slot); |
| if (func > 0 || is_pci_multifunction(names->pcidev)) |
| l = strpcpyf(&s, l, "f%u", func); |
| if (port_name) |
| l = strpcpyf(&s, l, "n%s", port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%u", dev_port); |
| if (l == 0) |
| names->pci_path[0] = '\0'; |
| |
| /* ACPI _SUN — slot user number */ |
| pci = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci"); |
| if (!pci) { |
| err = -ENOENT; |
| goto out; |
| } |
| |
| xsprintf(slots, "%s/slots", udev_device_get_syspath(pci)); |
| dir = opendir(slots); |
| if (!dir) { |
| err = -errno; |
| goto out; |
| } |
| |
| FOREACH_DIRENT_ALL(dent, dir, break) { |
| int i; |
| char *rest, *address, str[PATH_MAX]; |
| |
| if (dent->d_name[0] == '.') |
| continue; |
| i = strtol(dent->d_name, &rest, 10); |
| if (rest[0] != '\0') |
| continue; |
| if (i < 1) |
| continue; |
| |
| xsprintf(str, "%s/%s/address", slots, dent->d_name); |
| if (read_one_line_file(str, &address) >= 0) { |
| /* match slot address with device by stripping the function */ |
| if (strneq(address, udev_device_get_sysname(names->pcidev), strlen(address))) |
| hotplug_slot = i; |
| free(address); |
| } |
| |
| if (hotplug_slot > 0) |
| break; |
| } |
| |
| if (hotplug_slot > 0) { |
| s = names->pci_slot; |
| l = sizeof(names->pci_slot); |
| if (domain > 0) |
| l = strpcpyf(&s, l, "P%d", domain); |
| l = strpcpyf(&s, l, "s%d", hotplug_slot); |
| if (func > 0 || is_pci_multifunction(names->pcidev)) |
| l = strpcpyf(&s, l, "f%d", func); |
| if (port_name) |
| l = strpcpyf(&s, l, "n%s", port_name); |
| else if (dev_port > 0) |
| l = strpcpyf(&s, l, "d%d", dev_port); |
| if (l == 0) |
| names->pci_slot[0] = '\0'; |
| } |
| out: |
| udev_device_unref(pci); |
| return err; |
| } |
| |
| static int names_vio(struct udev_device *dev, struct netnames *names) { |
| struct udev_device *parent; |
| unsigned busid, slotid, ethid; |
| const char *syspath; |
| |
| /* check if our direct parent is a VIO device with no other bus in-between */ |
| parent = udev_device_get_parent(dev); |
| if (!parent) |
| return -ENOENT; |
| |
| if (!streq_ptr("vio", udev_device_get_subsystem(parent))) |
| return -ENOENT; |
| |
| /* The devices' $DEVPATH number is tied to (virtual) hardware (slot id |
| * selected in the HMC), thus this provides a reliable naming (e.g. |
| * "/devices/vio/30000002/net/eth1"); we ignore the bus number, as |
| * there should only ever be one bus, and then remove leading zeros. */ |
| syspath = udev_device_get_syspath(dev); |
| |
| if (sscanf(syspath, "/sys/devices/vio/%4x%4x/net/eth%u", &busid, &slotid, ðid) != 3) |
| return -EINVAL; |
| |
| xsprintf(names->vio_slot, "v%u", slotid); |
| names->type = NET_VIO; |
| return 0; |
| } |
| |
| #define _PLATFORM_TEST "/sys/devices/platform/vvvvPPPP" |
| #define _PLATFORM_PATTERN4 "/sys/devices/platform/%4s%4x:%2x/net/eth%u" |
| #define _PLATFORM_PATTERN3 "/sys/devices/platform/%3s%4x:%2x/net/eth%u" |
| |
| static int names_platform(struct udev_device *dev, struct netnames *names, bool test) { |
| struct udev_device *parent; |
| char vendor[5]; |
| unsigned model, instance, ethid; |
| const char *syspath, *pattern, *validchars; |
| |
| /* check if our direct parent is a platform device with no other bus in-between */ |
| parent = udev_device_get_parent(dev); |
| if (!parent) |
| return -ENOENT; |
| |
| if (!streq_ptr("platform", udev_device_get_subsystem(parent))) |
| return -ENOENT; |
| |
| syspath = udev_device_get_syspath(dev); |
| |
| /* syspath is too short, to have a valid ACPI instance */ |
| if (strlen(syspath) < sizeof _PLATFORM_TEST) |
| return -EINVAL; |
| |
| /* Vendor ID can be either PNP ID (3 chars A-Z) or ACPI ID (4 chars A-Z and numerals) */ |
| if (syspath[sizeof _PLATFORM_TEST - 1] == ':') { |
| pattern = _PLATFORM_PATTERN4; |
| validchars = UPPERCASE_LETTERS DIGITS; |
| } else { |
| pattern = _PLATFORM_PATTERN3; |
| validchars = UPPERCASE_LETTERS; |
| } |
| |
| /* Platform devices are named after ACPI table match, and instance id |
| * eg. "/sys/devices/platform/HISI00C2:00"); |
| * The Vendor (3 or 4 char), followed by hexdecimal model number : instance id. |
| */ |
| |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wformat-nonliteral" |
| if (sscanf(syspath, pattern, vendor, &model, &instance, ðid) != 4) |
| return -EINVAL; |
| #pragma GCC diagnostic pop |
| |
| if (!in_charset(vendor, validchars)) |
| return -ENOENT; |
| |
| ascii_strlower(vendor); |
| |
| xsprintf(names->platform_path, "a%s%xi%u", vendor, model, instance); |
| names->type = NET_PLATFORM; |
| return 0; |
| } |
| |
| static int names_pci(struct udev_device *dev, struct netnames *names) { |
| struct udev_device *parent; |
| |
| assert(dev); |
| assert(names); |
| |
| parent = udev_device_get_parent(dev); |
| /* skip virtio subsystem if present */ |
| parent = skip_virtio(parent); |
| |
| if (!parent) |
| return -ENOENT; |
| |
| /* check if our direct parent is a PCI device with no other bus in-between */ |
| if (streq_ptr("pci", udev_device_get_subsystem(parent))) { |
| names->type = NET_PCI; |
| names->pcidev = parent; |
| } else { |
| names->pcidev = udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL); |
| if (!names->pcidev) |
| return -ENOENT; |
| } |
| dev_pci_onboard(dev, names); |
| dev_pci_slot(dev, names); |
| return 0; |
| } |
| |
| static int names_usb(struct udev_device *dev, struct netnames *names) { |
| struct udev_device *usbdev; |
| char name[256]; |
| char *ports; |
| char *config; |
| char *interf; |
| size_t l; |
| char *s; |
| |
| assert(dev); |
| assert(names); |
| |
| usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface"); |
| if (!usbdev) |
| return -ENOENT; |
| |
| /* get USB port number chain, configuration, interface */ |
| strscpy(name, sizeof(name), udev_device_get_sysname(usbdev)); |
| s = strchr(name, '-'); |
| if (!s) |
| return -EINVAL; |
| ports = s+1; |
| |
| s = strchr(ports, ':'); |
| if (!s) |
| return -EINVAL; |
| s[0] = '\0'; |
| config = s+1; |
| |
| s = strchr(config, '.'); |
| if (!s) |
| return -EINVAL; |
| s[0] = '\0'; |
| interf = s+1; |
| |
| /* prefix every port number in the chain with "u" */ |
| s = ports; |
| while ((s = strchr(s, '.'))) |
| s[0] = 'u'; |
| s = names->usb_ports; |
| l = strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL); |
| |
| /* append USB config number, suppress the common config == 1 */ |
| if (!streq(config, "1")) |
| l = strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL); |
| |
| /* append USB interface number, suppress the interface == 0 */ |
| if (!streq(interf, "0")) |
| l = strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL); |
| if (l == 0) |
| return -ENAMETOOLONG; |
| |
| names->type = NET_USB; |
| return 0; |
| } |
| |
| static int names_bcma(struct udev_device *dev, struct netnames *names) { |
| struct udev_device *bcmadev; |
| unsigned int core; |
| |
| assert(dev); |
| assert(names); |
| |
| bcmadev = udev_device_get_parent_with_subsystem_devtype(dev, "bcma", NULL); |
| if (!bcmadev) |
| return -ENOENT; |
| |
| /* bus num:core num */ |
| if (sscanf(udev_device_get_sysname(bcmadev), "bcma%*u:%u", &core) != 1) |
| return -EINVAL; |
| /* suppress the common core == 0 */ |
| if (core > 0) |
| xsprintf(names->bcma_core, "b%u", core); |
| |
| names->type = NET_BCMA; |
| return 0; |
| } |
| |
| static int names_ccw(struct udev_device *dev, struct netnames *names) { |
| struct udev_device *cdev; |
| const char *bus_id, *subsys; |
| size_t bus_id_len; |
| size_t bus_id_start; |
| int rc; |
| |
| assert(dev); |
| assert(names); |
| |
| /* Retrieve the associated CCW device */ |
| cdev = udev_device_get_parent(dev); |
| /* skip virtio subsystem if present */ |
| cdev = skip_virtio(cdev); |
| if (!cdev) |
| return -ENOENT; |
| |
| /* Network devices are either single or grouped CCW devices */ |
| subsys = udev_device_get_subsystem(cdev); |
| if (!STRPTR_IN_SET(subsys, "ccwgroup", "ccw")) |
| return -ENOENT; |
| |
| /* Retrieve bus-ID of the CCW device. The bus-ID uniquely |
| * identifies the network device on the Linux on System z channel |
| * subsystem. Note that the bus-ID contains lowercase characters. |
| */ |
| bus_id = udev_device_get_sysname(cdev); |
| if (!bus_id) |
| return -ENOENT; |
| |
| /* Check the length of the bus-ID. Rely on that the kernel provides |
| * a correct bus-ID; alternatively, improve this check and parse and |
| * verify each bus-ID part... |
| */ |
| bus_id_len = strlen(bus_id); |
| if (!IN_SET(bus_id_len, 8, 9)) |
| return -EINVAL; |
| |
| /* Strip leading zeros from the bus id for aesthetic purposes. This |
| * keeps the ccw names stable, yet much shorter in general case of |
| * bus_id 0.0.0600 -> 600. This is similar to e.g. how PCI domain is |
| * not prepended when it is zero. Preserve the last 0 for 0.0.0000. |
| */ |
| bus_id_start = strspn(bus_id, ".0"); |
| bus_id += bus_id_start < bus_id_len ? bus_id_start : bus_id_len - 1; |
| |
| /* Store the CCW bus-ID for use as network device name */ |
| rc = snprintf(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id); |
| if (rc >= 0 && rc < (int)sizeof(names->ccw_busid)) |
| names->type = NET_CCW; |
| return 0; |
| } |
| |
| static int names_mac(struct udev_device *dev, struct netnames *names) { |
| const char *s; |
| unsigned int i; |
| unsigned int a1, a2, a3, a4, a5, a6; |
| |
| /* check for NET_ADDR_PERM, skip random MAC addresses */ |
| s = udev_device_get_sysattr_value(dev, "addr_assign_type"); |
| if (!s) |
| return EXIT_FAILURE; |
| i = strtoul(s, NULL, 0); |
| if (i != 0) |
| return 0; |
| |
| s = udev_device_get_sysattr_value(dev, "address"); |
| if (!s) |
| return -ENOENT; |
| if (sscanf(s, "%x:%x:%x:%x:%x:%x", &a1, &a2, &a3, &a4, &a5, &a6) != 6) |
| return -EINVAL; |
| |
| /* skip empty MAC addresses */ |
| if (a1 + a2 + a3 + a4 + a5 + a6 == 0) |
| return -EINVAL; |
| |
| names->mac[0] = a1; |
| names->mac[1] = a2; |
| names->mac[2] = a3; |
| names->mac[3] = a4; |
| names->mac[4] = a5; |
| names->mac[5] = a6; |
| names->mac_valid = true; |
| return 0; |
| } |
| |
| /* IEEE Organizationally Unique Identifier vendor string */ |
| static int ieee_oui(struct udev_device *dev, struct netnames *names, bool test) { |
| char str[32]; |
| |
| if (!names->mac_valid) |
| return -ENOENT; |
| /* skip commonly misused 00:00:00 (Xerox) prefix */ |
| if (memcmp(names->mac, "\0\0\0", 3) == 0) |
| return -EINVAL; |
| xsprintf(str, "OUI:%02X%02X%02X%02X%02X%02X", names->mac[0], |
| names->mac[1], names->mac[2], names->mac[3], names->mac[4], |
| names->mac[5]); |
| udev_builtin_hwdb_lookup(dev, NULL, str, NULL, test); |
| return 0; |
| } |
| |
| static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) { |
| const char *s; |
| const char *p; |
| unsigned int i; |
| const char *devtype; |
| const char *prefix = "en"; |
| struct netnames names = {}; |
| int err; |
| |
| /* handle only ARPHRD_ETHER and ARPHRD_SLIP devices */ |
| s = udev_device_get_sysattr_value(dev, "type"); |
| if (!s) |
| return EXIT_FAILURE; |
| i = strtoul(s, NULL, 0); |
| switch (i) { |
| case ARPHRD_ETHER: |
| prefix = "en"; |
| break; |
| case ARPHRD_SLIP: |
| prefix = "sl"; |
| break; |
| default: |
| return 0; |
| } |
| |
| /* skip stacked devices, like VLANs, ... */ |
| s = udev_device_get_sysattr_value(dev, "ifindex"); |
| if (!s) |
| return EXIT_FAILURE; |
| p = udev_device_get_sysattr_value(dev, "iflink"); |
| if (!p) |
| return EXIT_FAILURE; |
| if (!streq(s, p)) |
| return 0; |
| |
| devtype = udev_device_get_devtype(dev); |
| if (devtype) { |
| if (streq("wlan", devtype)) |
| prefix = "wl"; |
| else if (streq("wwan", devtype)) |
| prefix = "ww"; |
| } |
| |
| err = names_mac(dev, &names); |
| if (err >= 0 && names.mac_valid) { |
| char str[IFNAMSIZ]; |
| |
| xsprintf(str, "%sx%02x%02x%02x%02x%02x%02x", prefix, |
| names.mac[0], names.mac[1], names.mac[2], |
| names.mac[3], names.mac[4], names.mac[5]); |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str); |
| |
| ieee_oui(dev, &names, test); |
| } |
| |
| /* get path names for Linux on System z network devices */ |
| err = names_ccw(dev, &names); |
| if (err >= 0 && names.type == NET_CCW) { |
| char str[IFNAMSIZ]; |
| |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.ccw_busid) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| goto out; |
| } |
| |
| /* get ibmveth/ibmvnic slot-based names. */ |
| err = names_vio(dev, &names); |
| if (err >= 0 && names.type == NET_VIO) { |
| char str[IFNAMSIZ]; |
| |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.vio_slot) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| goto out; |
| } |
| |
| /* get ACPI path names for ARM64 platform devices */ |
| err = names_platform(dev, &names, test); |
| if (err >= 0 && names.type == NET_PLATFORM) { |
| char str[IFNAMSIZ]; |
| |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.platform_path) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| goto out; |
| } |
| |
| /* get PCI based path names, we compose only PCI based paths */ |
| err = names_pci(dev, &names); |
| if (err < 0) |
| goto out; |
| |
| /* plain PCI device */ |
| if (names.type == NET_PCI) { |
| char str[IFNAMSIZ]; |
| |
| if (names.pci_onboard[0]) |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str); |
| |
| if (names.pci_onboard_label) |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard_label) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str); |
| |
| if (names.pci_path[0]) |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_path) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0]) |
| if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_slot) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| goto out; |
| } |
| |
| /* USB device */ |
| err = names_usb(dev, &names); |
| if (err >= 0 && names.type == NET_USB) { |
| char str[IFNAMSIZ]; |
| |
| if (names.pci_path[0]) |
| if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.usb_ports) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0]) |
| if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.usb_ports) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| goto out; |
| } |
| |
| /* Broadcom bus */ |
| err = names_bcma(dev, &names); |
| if (err >= 0 && names.type == NET_BCMA) { |
| char str[IFNAMSIZ]; |
| |
| if (names.pci_path[0]) |
| if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.bcma_core) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str); |
| |
| if (names.pci_slot[0]) |
| if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.bcma_core) < (int)sizeof(str)) |
| udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str); |
| goto out; |
| } |
| out: |
| return EXIT_SUCCESS; |
| } |
| |
| const struct udev_builtin udev_builtin_net_id = { |
| .name = "net_id", |
| .cmd = builtin_net_id, |
| .help = "Network device properties", |
| }; |