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/* SPDX-License-Identifier: LGPL-2.1+ */
/*
* 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
*
* https://systemd.io/PREDICTABLE_INTERFACE_NAMES
*
* When the code here is changed, man/systemd.net-naming-scheme.xml must be updated too.
*/
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/if.h>
#include <linux/pci_regs.h>
#include "alloc-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "netif-naming-scheme.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "strxcpyx.h"
#include "udev-builtin.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,
NET_NETDEVSIM,
};
struct netnames {
enum netname_type type;
uint8_t mac[6];
bool mac_valid;
sd_device *pcidev;
char pci_slot[ALTIFNAMSIZ];
char pci_path[ALTIFNAMSIZ];
char pci_onboard[ALTIFNAMSIZ];
const char *pci_onboard_label;
char usb_ports[ALTIFNAMSIZ];
char bcma_core[ALTIFNAMSIZ];
char ccw_busid[ALTIFNAMSIZ];
char vio_slot[ALTIFNAMSIZ];
char platform_path[ALTIFNAMSIZ];
char netdevsim_path[ALTIFNAMSIZ];
};
struct virtfn_info {
sd_device *physfn_pcidev;
char suffix[ALTIFNAMSIZ];
};
/* skip intermediate virtio devices */
static sd_device *skip_virtio(sd_device *dev) {
sd_device *parent;
/* 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 */
for (parent = dev; parent; ) {
const char *subsystem;
if (sd_device_get_subsystem(parent, &subsystem) < 0)
break;
if (!streq(subsystem, "virtio"))
break;
if (sd_device_get_parent(parent, &parent) < 0)
return NULL;
}
return parent;
}
static int get_virtfn_info(sd_device *dev, struct netnames *names, struct virtfn_info *ret) {
_cleanup_(sd_device_unrefp) sd_device *physfn_pcidev = NULL;
const char *physfn_link_file, *syspath;
_cleanup_free_ char *physfn_pci_syspath = NULL;
_cleanup_free_ char *virtfn_pci_syspath = NULL;
struct dirent *dent;
_cleanup_closedir_ DIR *dir = NULL;
char suffix[ALTIFNAMSIZ];
int r;
assert(dev);
assert(names);
assert(ret);
r = sd_device_get_syspath(names->pcidev, &syspath);
if (r < 0)
return r;
/* Check if this is a virtual function. */
physfn_link_file = strjoina(syspath, "/physfn");
r = chase_symlinks(physfn_link_file, NULL, 0, &physfn_pci_syspath, NULL);
if (r < 0)
return r;
/* Get physical function's pci device. */
r = sd_device_new_from_syspath(&physfn_pcidev, physfn_pci_syspath);
if (r < 0)
return r;
/* Find the virtual function number by finding the right virtfn link. */
dir = opendir(physfn_pci_syspath);
if (!dir)
return -errno;
FOREACH_DIRENT_ALL(dent, dir, break) {
_cleanup_free_ char *virtfn_link_file = NULL;
if (!startswith(dent->d_name, "virtfn"))
continue;
virtfn_link_file = path_join(physfn_pci_syspath, dent->d_name);
if (!virtfn_link_file)
return -ENOMEM;
if (chase_symlinks(virtfn_link_file, NULL, 0, &virtfn_pci_syspath, NULL) < 0)
continue;
if (streq(syspath, virtfn_pci_syspath)) {
if (!snprintf_ok(suffix, sizeof(suffix), "v%s", &dent->d_name[6]))
return -ENOENT;
break;
}
}
if (isempty(suffix))
return -ENOENT;
ret->physfn_pcidev = TAKE_PTR(physfn_pcidev);
strncpy(ret->suffix, suffix, sizeof(ret->suffix));
return 0;
}
/* retrieve on-board index number and label from firmware */
static int dev_pci_onboard(sd_device *dev, struct netnames *names) {
unsigned long idx, dev_port = 0;
const char *attr, *port_name = NULL;
size_t l;
char *s;
int r;
/* ACPI _DSM — device specific method for naming a PCI or PCI Express device */
if (sd_device_get_sysattr_value(names->pcidev, "acpi_index", &attr) < 0) {
/* SMBIOS type 41 — Onboard Devices Extended Information */
r = sd_device_get_sysattr_value(names->pcidev, "index", &attr);
if (r < 0)
return r;
}
r = safe_atolu(attr, &idx);
if (r < 0)
return r;
if (idx == 0 && !naming_scheme_has(NAMING_ZERO_ACPI_INDEX))
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 this 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 */
if (sd_device_get_sysattr_value(dev, "dev_port", &attr) >= 0)
dev_port = strtoul(attr, NULL, 10);
/* kernel provided front panel port name for multiple port PCI device */
(void) sd_device_get_sysattr_value(dev, "phys_port_name", &port_name);
s = names->pci_onboard;
l = sizeof(names->pci_onboard);
l = strpcpyf(&s, l, "o%lu", idx);
if (port_name)
l = strpcpyf(&s, l, "n%s", port_name);
else if (dev_port > 0)
l = strpcpyf(&s, l, "d%lu", dev_port);
if (l == 0)
names->pci_onboard[0] = '\0';
if (sd_device_get_sysattr_value(names->pcidev, "label", &names->pci_onboard_label) < 0)
names->pci_onboard_label = NULL;
return 0;
}
/* read the 256 bytes PCI configuration space to check the multi-function bit */
static bool is_pci_multifunction(sd_device *dev) {
_cleanup_close_ int fd = -1;
const char *filename, *syspath;
uint8_t config[64];
if (sd_device_get_syspath(dev, &syspath) < 0)
return false;
filename = strjoina(syspath, "/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 */
return config[PCI_HEADER_TYPE] & 0x80;
}
static bool is_pci_ari_enabled(sd_device *dev) {
const char *a;
if (sd_device_get_sysattr_value(dev, "ari_enabled", &a) < 0)
return false;
return streq(a, "1");
}
static int dev_pci_slot(sd_device *dev, struct netnames *names) {
unsigned long dev_port = 0;
unsigned domain, bus, slot, func, hotplug_slot = 0;
size_t l;
char *s;
const char *sysname, *attr, *port_name = NULL, *syspath;
_cleanup_(sd_device_unrefp) sd_device *pci = NULL;
sd_device *hotplug_slot_dev;
char slots[PATH_MAX];
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
int r;
r = sd_device_get_sysname(names->pcidev, &sysname);
if (r < 0)
return r;
if (sscanf(sysname, "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4)
return -ENOENT;
if (naming_scheme_has(NAMING_NPAR_ARI) &&
is_pci_ari_enabled(names->pcidev))
/* ARI devices support up to 256 functions on a single device ("slot"), and interpret the
* traditional 5-bit slot and 3-bit function number as a single 8-bit function number,
* where the slot makes up the upper 5 bits. */
func += slot * 8;
/* kernel provided port index for multiple ports on a single PCI function */
if (sd_device_get_sysattr_value(dev, "dev_port", &attr) >= 0) {
dev_port = strtoul(attr, NULL, 10);
/* With older kernels IP-over-InfiniBand network interfaces sometimes erroneously
* provide the port number in the 'dev_id' sysfs attribute instead of 'dev_port',
* which thus stays initialized as 0. */
if (dev_port == 0 &&
sd_device_get_sysattr_value(dev, "type", &attr) >= 0) {
unsigned long type;
type = strtoul(attr, NULL, 10);
if (type == ARPHRD_INFINIBAND &&
sd_device_get_sysattr_value(dev, "dev_id", &attr) >= 0)
dev_port = strtoul(attr, NULL, 16);
}
}
/* kernel provided front panel port name for multi-port PCI device */
(void) sd_device_get_sysattr_value(dev, "phys_port_name", &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%lu", dev_port);
if (l == 0)
names->pci_path[0] = '\0';
/* ACPI _SUN — slot user number */
r = sd_device_new_from_subsystem_sysname(&pci, "subsystem", "pci");
if (r < 0)
return r;
r = sd_device_get_syspath(pci, &syspath);
if (r < 0)
return r;
if (!snprintf_ok(slots, sizeof slots, "%s/slots", syspath))
return -ENAMETOOLONG;
dir = opendir(slots);
if (!dir)
return -errno;
hotplug_slot_dev = names->pcidev;
while (hotplug_slot_dev) {
if (sd_device_get_sysname(hotplug_slot_dev, &sysname) < 0)
continue;
FOREACH_DIRENT_ALL(dent, dir, break) {
unsigned i;
char str[PATH_MAX];
_cleanup_free_ char *address = NULL;
if (dot_or_dot_dot(dent->d_name))
continue;
r = safe_atou_full(dent->d_name, 10, &i);
if (r < 0 || i <= 0)
continue;
/* match slot address with device by stripping the function */
if (snprintf_ok(str, sizeof str, "%s/%s/address", slots, dent->d_name) &&
read_one_line_file(str, &address) >= 0 &&
startswith(sysname, address)) {
hotplug_slot = i;
break;
}
}
if (hotplug_slot > 0)
break;
if (sd_device_get_parent_with_subsystem_devtype(hotplug_slot_dev, "pci", NULL, &hotplug_slot_dev) < 0)
break;
rewinddir(dir);
}
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%lu", dev_port);
if (l == 0)
names->pci_slot[0] = '\0';
}
return 0;
}
static int names_vio(sd_device *dev, struct netnames *names) {
sd_device *parent;
unsigned busid, slotid, ethid;
const char *syspath, *subsystem;
int r;
/* check if our direct parent is a VIO device with no other bus in-between */
r = sd_device_get_parent(dev, &parent);
if (r < 0)
return r;
r = sd_device_get_subsystem(parent, &subsystem);
if (r < 0)
return r;
if (!streq("vio", subsystem))
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. */
r = sd_device_get_syspath(dev, &syspath);
if (r < 0)
return r;
if (sscanf(syspath, "/sys/devices/vio/%4x%4x/net/eth%u", &busid, &slotid, &ethid) != 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(sd_device *dev, struct netnames *names, bool test) {
sd_device *parent;
char vendor[5];
unsigned model, instance, ethid;
const char *syspath, *pattern, *validchars, *subsystem;
int r;
/* check if our direct parent is a platform device with no other bus in-between */
r = sd_device_get_parent(dev, &parent);
if (r < 0)
return r;
r = sd_device_get_subsystem(parent, &subsystem);
if (r < 0)
return r;
if (!streq("platform", subsystem))
return -ENOENT;
r = sd_device_get_syspath(dev, &syspath);
if (r < 0)
return r;
/* 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.
*/
DISABLE_WARNING_FORMAT_NONLITERAL;
if (sscanf(syspath, pattern, vendor, &model, &instance, &ethid) != 4)
return -EINVAL;
REENABLE_WARNING;
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(sd_device *dev, struct netnames *names) {
sd_device *parent;
struct netnames vf_names = {};
struct virtfn_info vf_info = {};
const char *subsystem;
int r;
assert(dev);
assert(names);
r = sd_device_get_parent(dev, &parent);
if (r < 0)
return r;
/* 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 (sd_device_get_subsystem(parent, &subsystem) >= 0 &&
streq("pci", subsystem)) {
names->type = NET_PCI;
names->pcidev = parent;
} else {
r = sd_device_get_parent_with_subsystem_devtype(dev, "pci", NULL, &names->pcidev);
if (r < 0)
return r;
}
if (naming_scheme_has(NAMING_SR_IOV_V) &&
get_virtfn_info(dev, names, &vf_info) >= 0) {
/* If this is an SR-IOV virtual device, get base name using physical device and add virtfn suffix. */
vf_names.pcidev = vf_info.physfn_pcidev;
dev_pci_onboard(dev, &vf_names);
dev_pci_slot(dev, &vf_names);
if (vf_names.pci_onboard[0])
if (strlen(vf_names.pci_onboard) + strlen(vf_info.suffix) < sizeof(names->pci_onboard))
strscpyl(names->pci_onboard, sizeof(names->pci_onboard),
vf_names.pci_onboard, vf_info.suffix, NULL);
if (vf_names.pci_slot[0])
if (strlen(vf_names.pci_slot) + strlen(vf_info.suffix) < sizeof(names->pci_slot))
strscpyl(names->pci_slot, sizeof(names->pci_slot),
vf_names.pci_slot, vf_info.suffix, NULL);
if (vf_names.pci_path[0])
if (strlen(vf_names.pci_path) + strlen(vf_info.suffix) < sizeof(names->pci_path))
strscpyl(names->pci_path, sizeof(names->pci_path),
vf_names.pci_path, vf_info.suffix, NULL);
sd_device_unref(vf_info.physfn_pcidev);
} else {
dev_pci_onboard(dev, names);
dev_pci_slot(dev, names);
}
return 0;
}
static int names_usb(sd_device *dev, struct netnames *names) {
sd_device *usbdev;
char name[256], *ports, *config, *interf, *s;
const char *sysname;
size_t l;
int r;
assert(dev);
assert(names);
r = sd_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface", &usbdev);
if (r < 0)
return r;
r = sd_device_get_sysname(usbdev, &sysname);
if (r < 0)
return r;
/* get USB port number chain, configuration, interface */
strscpy(name, sizeof(name), sysname);
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(sd_device *dev, struct netnames *names) {
sd_device *bcmadev;
unsigned core;
const char *sysname;
int r;
assert(dev);
assert(names);
r = sd_device_get_parent_with_subsystem_devtype(dev, "bcma", NULL, &bcmadev);
if (r < 0)
return r;
r = sd_device_get_sysname(bcmadev, &sysname);
if (r < 0)
return r;
/* bus num:core num */
if (sscanf(sysname, "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(sd_device *dev, struct netnames *names) {
sd_device *cdev;
const char *bus_id, *subsys;
size_t bus_id_len;
size_t bus_id_start;
int r;
assert(dev);
assert(names);
/* Retrieve the associated CCW device */
r = sd_device_get_parent(dev, &cdev);
if (r < 0)
return r;
/* skip virtio subsystem if present */
cdev = skip_virtio(cdev);
if (!cdev)
return -ENOENT;
r = sd_device_get_subsystem(cdev, &subsys);
if (r < 0)
return r;
/* Network devices are either single or grouped CCW devices */
if (!STR_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.
*/
r = sd_device_get_sysname(cdev, &bus_id);
if (r < 0)
return r;
/* Check the length of the bus-ID. Rely on the fact 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 */
if (snprintf_ok(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id))
names->type = NET_CCW;
return 0;
}
static int names_mac(sd_device *dev, struct netnames *names) {
const char *s;
unsigned long i;
unsigned a1, a2, a3, a4, a5, a6;
int r;
/* Some kinds of devices tend to have hardware addresses
* that are impossible to use in an iface name.
*/
r = sd_device_get_sysattr_value(dev, "type", &s);
if (r < 0)
return r;
i = strtoul(s, NULL, 0);
switch (i) {
/* The persistent part of a hardware address of an InfiniBand NIC
* is 8 bytes long. We cannot fit this much in an iface name.
*/
case ARPHRD_INFINIBAND:
return -EINVAL;
default:
break;
}
/* check for NET_ADDR_PERM, skip random MAC addresses */
r = sd_device_get_sysattr_value(dev, "addr_assign_type", &s);
if (r < 0)
return r;
i = strtoul(s, NULL, 0);
if (i != 0)
return 0;
r = sd_device_get_sysattr_value(dev, "address", &s);
if (r < 0)
return r;
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;
}
static int names_netdevsim(sd_device *dev, struct netnames *names) {
sd_device *netdevsimdev;
const char *sysname;
unsigned addr;
const char *port_name = NULL;
int r;
bool ok;
if (!naming_scheme_has(NAMING_NETDEVSIM))
return 0;
assert(dev);
assert(names);
r = sd_device_get_parent_with_subsystem_devtype(dev, "netdevsim", NULL, &netdevsimdev);
if (r < 0)
return r;
r = sd_device_get_sysname(netdevsimdev, &sysname);
if (r < 0)
return r;
if (sscanf(sysname, "netdevsim%u", &addr) != 1)
return -EINVAL;
r = sd_device_get_sysattr_value(dev, "phys_port_name", &port_name);
if (r < 0)
return r;
ok = snprintf_ok(names->netdevsim_path, sizeof(names->netdevsim_path), "i%un%s", addr, port_name);
if (!ok)
return -ENOBUFS;
names->type = NET_NETDEVSIM;
return 0;
}
/* IEEE Organizationally Unique Identifier vendor string */
static int ieee_oui(sd_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(sd_device *dev, int argc, char *argv[], bool test) {
const char *s, *p, *devtype, *prefix = "en";
struct netnames names = {};
unsigned long i;
int r;
/* handle only ARPHRD_ETHER, ARPHRD_SLIP and ARPHRD_INFINIBAND devices */
r = sd_device_get_sysattr_value(dev, "type", &s);
if (r < 0)
return r;
i = strtoul(s, NULL, 0);
switch (i) {
case ARPHRD_ETHER:
prefix = "en";
break;
case ARPHRD_INFINIBAND:
if (naming_scheme_has(NAMING_INFINIBAND))
prefix = "ib";
else
return 0;
break;
case ARPHRD_SLIP:
prefix = "sl";
break;
default:
return 0;
}
/* skip stacked devices, like VLANs, ... */
r = sd_device_get_sysattr_value(dev, "ifindex", &s);
if (r < 0)
return r;
r = sd_device_get_sysattr_value(dev, "iflink", &p);
if (r < 0)
return r;
if (!streq(s, p))
return 0;
if (sd_device_get_devtype(dev, &devtype) >= 0) {
if (streq("wlan", devtype))
prefix = "wl";
else if (streq("wwan", devtype))
prefix = "ww";
}
udev_builtin_add_property(dev, test, "ID_NET_NAMING_SCHEME", naming_scheme()->name);
r = names_mac(dev, &names);
if (r >= 0 && names.mac_valid) {
char str[ALTIFNAMSIZ];
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 */
if (names_ccw(dev, &names) >= 0 && names.type == NET_CCW) {
char str[ALTIFNAMSIZ];
if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.ccw_busid))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
return 0;
}
/* get ibmveth/ibmvnic slot-based names. */
if (names_vio(dev, &names) >= 0 && names.type == NET_VIO) {
char str[ALTIFNAMSIZ];
if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.vio_slot))
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
return 0;
}
/* get ACPI path names for ARM64 platform devices */
if (names_platform(dev, &names, test) >= 0 && names.type == NET_PLATFORM) {
char str[ALTIFNAMSIZ];
if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.platform_path))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
return 0;
}
/* get netdevsim path names */
if (names_netdevsim(dev, &names) >= 0 && names.type == NET_NETDEVSIM) {
char str[ALTIFNAMSIZ];
if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.netdevsim_path))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
return 0;
}
/* get PCI based path names, we compose only PCI based paths */
if (names_pci(dev, &names) < 0)
return 0;
/* plain PCI device */
if (names.type == NET_PCI) {
char str[ALTIFNAMSIZ];
if (names.pci_onboard[0] &&
snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_onboard))
udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str);
if (names.pci_onboard_label &&
snprintf_ok(str, sizeof str, "%s%s",
naming_scheme_has(NAMING_LABEL_NOPREFIX) ? "" : prefix,
names.pci_onboard_label))
udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str);
if (names.pci_path[0] &&
snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_path))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
if (names.pci_slot[0] &&
snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_slot))
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
return 0;
}
/* USB device */
if (names_usb(dev, &names) >= 0 && names.type == NET_USB) {
char str[ALTIFNAMSIZ];
if (names.pci_path[0] &&
snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.usb_ports))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
if (names.pci_slot[0] &&
snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.usb_ports))
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
return 0;
}
/* Broadcom bus */
if (names_bcma(dev, &names) >= 0 && names.type == NET_BCMA) {
char str[ALTIFNAMSIZ];
if (names.pci_path[0] &&
snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.bcma_core))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
if (names.pci_slot[0] &&
snprintf(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.bcma_core))
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
return 0;
}
return 0;
}
const UdevBuiltin udev_builtin_net_id = {
.name = "net_id",
.cmd = builtin_net_id,
.help = "Network device properties",
};
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