+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
***/
/*
- * predictable network interface device names based on:
+ * 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
*
- * two character prefixes based on the type of interface:
- * en -- ethernet
- * wl -- wlan
- * ww -- wwan
+ * http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames
*
- * type of names:
- * o<index> -- on-board device index number
- * s<slot>[f<function>] -- hotplug slot index number
- * x<MAC> -- MAC address
- * p<bus>s<slot>[f<function>] -- PCI geographical location
+ * Two character prefixes based on the type of interface:
+ * en — Ethernet
+ * sl — serial line IP (slip)
+ * wl — wlan
+ * ww — wwan
*
- * All multi-function devices will carry the [f<function>] number in the
+ * 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.
*
- * examples:
+ * 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
- * ID_NET_NAME_SLOT=ens2f0
- * ID_NET_NAME_SLOT=ens2f1
- * ID_NET_NAME_MAC=enxf0def180d479
- * ID_NET_NAME_PATH=enp0s25
- * ID_NET_NAME_PATH=enp19s3f0
- * ID_NET_NAME_PATH=enp19s3f1
+ *
+ * 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 <stdarg.h>
-#include <unistd.h>
#include <string.h>
-#include <errno.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 udev_device *parent, const char *prefix, bool test) {
- const char *index;
+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;
- const char *label;
- char s[16];
- int err;
- /* ACPI _DSM -- device specific method for naming a PCI or PCI Express device */
- index = udev_device_get_sysattr_value(parent, "acpi_index");
- /* SMBIOS type 41 -- Onboard Devices Extended Information */
- if (!index)
- index = udev_device_get_sysattr_value(parent, "index");
- if (!index)
+ /* 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(index, NULL, 0);
+
+ idx = strtoul(attr, NULL, 0);
if (idx <= 0)
return -EINVAL;
- snprintf(s, sizeof(s), "%so%d", prefix, idx);
- err = udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", s);
- if (err < 0)
- return err;
- label = udev_device_get_sysattr_value(parent, "label");
- if (label) {
- err = udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", label);
- if (err < 0)
- return err;
- }
+ /* 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_singlefunction(struct udev_device *dev) {
- char filename[256];
- FILE *f;
- char config[256];
- bool single = false;
-
- snprintf(filename, sizeof(filename), "%s/config", udev_device_get_syspath(dev));
- f = fopen(filename, "re");
- if (!f)
- goto out;
- if (fread(&config, sizeof(config), 1, f) != 1)
- goto out;
+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)
- single = true;
-out:
- fclose(f);
- return single;
+ if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
+ return true;
+
+ return false;
}
-static int dev_pci_slot(struct udev_device *dev, struct udev_device *parent, const char *prefix, bool test) {
- struct udev *udev = udev_device_get_udev(dev);
- unsigned int bus;
- unsigned int slot;
- unsigned int func;
+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[256];
- DIR *dir;
+ char slots[PATH_MAX];
+ _cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
- char str[256];
- int hotplug_slot = 0;
- int err = 0;
+ int hotplug_slot = 0, err = 0;
- /* compose a name based on the raw kernel's PCI bus, slot numbers */
- if (sscanf(udev_device_get_sysname(parent), "0000:%x:%x.%d", &bus, &slot, &func) != 3)
+ if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4)
return -ENOENT;
- if (func == 0 && is_pci_singlefunction(parent))
- snprintf(str, sizeof(str), "%sp%ds%d", prefix, bus, slot);
- else
- snprintf(str, sizeof(str), "%sp%ds%df%d", prefix, bus, slot, func);
- err = udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
- if (err < 0)
- return err;
- /* ACPI _SUN -- slot user number */
+ /* 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;
}
- snprintf(slots, sizeof(slots), "%s/slots", udev_device_get_syspath(pci));
+
+ snprintf(slots, sizeof slots, "%s/slots", udev_device_get_syspath(pci));
dir = opendir(slots);
if (!dir) {
err = -errno;
goto out;
}
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ FOREACH_DIRENT_ALL(dent, dir, break) {
int i;
- char *rest;
- char *address;
+ char *rest, *address, str[PATH_MAX];
if (dent->d_name[0] == '.')
continue;
continue;
if (i < 1)
continue;
- snprintf(str, sizeof(str), "%s/%s/address", slots, dent->d_name);
+
+ snprintf(str, sizeof 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 (strncmp(address, udev_device_get_sysname(parent), strlen(address)) == 0)
+ if (strneq(address, udev_device_get_sysname(names->pcidev), strlen(address)))
hotplug_slot = i;
free(address);
}
if (hotplug_slot > 0)
break;
}
- closedir(dir);
if (hotplug_slot > 0) {
- if (func == 0 && is_pci_singlefunction(parent))
- snprintf(str, sizeof(str), "%ss%d", prefix, hotplug_slot);
- else
- snprintf(str, sizeof(str), "%ss%df%d", prefix, hotplug_slot, func);
- err = udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+ 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 dev_pci(struct udev_device *dev, const char *prefix, bool test) {
+static int names_vio(struct udev_device *dev, struct netnames *names) {
struct udev_device *parent;
+ unsigned busid, slotid, ethid;
+ const char *syspath;
- /* skip other buses than direct PCI parents */
+ /* check if our direct parent is a VIO device with no other bus in-between */
parent = udev_device_get_parent(dev);
- if (!parent || !streq("pci", udev_device_get_subsystem(parent)))
+ if (!parent)
return -ENOENT;
- dev_pci_onboard(dev, parent, prefix, test);
- dev_pci_slot(dev, parent, prefix, test);
+ 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;
}
-static int dev_mac(struct udev_device *dev, const char *prefix, bool test) {
+#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 (!bus_id_len || bus_id_len < 8 || bus_id_len > 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;
- char str[16];
/* check for NET_ADDR_PERM, skip random MAC addresses */
s = udev_device_get_sysattr_value(dev, "addr_assign_type");
if (a1 + a2 + a3 + a4 + a5 + a6 == 0)
return -EINVAL;
- /*
- * IEEE Organizationally Unique Identifier vendor string
- * skip commonly misused 00:00:00 (Xerox) prefix
- */
- if (a1 + a2 + a3 > 0) {
- snprintf(str, sizeof(str), "OUI:%02X%02X%02X", a1, a2, a3);
- udev_builtin_hwdb_lookup(dev, str, test);
- }
+ 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];
- snprintf(str, sizeof(str), "%sx%02x%02x%02x%02x%02x%02x", prefix, a1, a2, a3, a4, a5, a6);
- return udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str);
+ 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 devices */
+ /* 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);
- if (i != 1)
+ 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);
prefix = "ww";
}
- dev_pci(dev, prefix, test);
- dev_mac(dev, prefix, test);
+ 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",
+ .help = "Network device properties",
};
projects / thirdparty / systemd.git / blobdiff