udev-builtin-net_id.c revision de892aea1c486b59e04884268b612081d1660514
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/***
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering This file is part of systemd.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Copyright 2012 Kay Sievers <kay@vrfy.org>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering systemd is free software; you can redistribute it and/or modify it
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering under the terms of the GNU Lesser General Public License as published by
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering the Free Software Foundation; either version 2.1 of the License, or
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering (at your option) any later version.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering systemd is distributed in the hope that it will be useful, but
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering WITHOUT ANY WARRANTY; without even the implied warranty of
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Lesser General Public License for more details.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering You should have received a copy of the GNU Lesser General Public License
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering along with systemd; If not, see <http://www.gnu.org/licenses/>.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering***/
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/*
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * prefixes:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * en -- ethernet
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * wl -- wlan
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering * ww -- wwan
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering *
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * types:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * o<index> -- on-board device index
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * s<slot>[f<function>] -- hotplug slot number
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * x<MAC> -- MAC address
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * p<bus>s<slot>[f<function>] -- PCI/physical location
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * example:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_ONBOARD=eno1
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_SLOT=ens1
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering * ID_NET_NAME_SLOT=ens2f0
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_SLOT=ens2f1
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_MAC=enxf0def180d479
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_PATH=enp0s25
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * ID_NET_NAME_PATH=enp19s3f0
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering * ID_NET_NAME_PATH=enp19s3f1
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <stdio.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <stdlib.h>
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering#include <stdarg.h>
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering#include <unistd.h>
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering#include <string.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <errno.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <linux/pci_regs.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "udev.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/* retrieve on-board index number and label from firmware */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int dev_pci_onboard(struct udev_device *dev, struct udev_device *parent, const char *prefix, bool test) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering const char *index;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int idx;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering const char *label;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering char s[16];
6073b6f26ab9fc6bf335faa7073ec443eef093fdTom Gundersen int err;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering /* ACPI _DSM -- device specific method for naming a PCI or PCI Express device */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering index = udev_device_get_sysattr_value(parent, "acpi_index");
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering /* SMBIOS type 41 -- Onboard Devices Extended Information */
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (!index)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering index = udev_device_get_sysattr_value(parent, "index");
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (!index)
e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering return -ENOENT;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering idx = strtoul(index, NULL, 0);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (idx <= 0)
1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return -EINVAL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering snprintf(s, sizeof(s), "%so%d", prefix, idx);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering err = udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", s);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (err < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return err;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering label = udev_device_get_sysattr_value(parent, "label");
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering if (label) {
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering err = udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", label);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (err < 0)
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering return err;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic bool is_pci_singlefunction(struct udev_device *dev) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering char filename[256];
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering FILE *f;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering char config[256];
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering 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;
/* 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;
}
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;
struct udev_device *pci = NULL;
char slots[256];
DIR *dir;
struct dirent *dent;
char str[256];
int hotplug_slot = 0;
int 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)
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 */
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));
dir = opendir(slots);
if (!dir) {
err = -errno;
goto out;
}
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
int i;
char *rest;
char *address;
if (dent->d_name[0] == '.')
continue;
i = strtol(dent->d_name, &rest, 10);
if (rest[0] != '\0')
continue;
if (i < 1)
continue;
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)
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);
}
out:
udev_device_unref(pci);
return err;
}
static int dev_pci(struct udev_device *dev, const char *prefix, bool test) {
struct udev_device *parent;
/* skip other buses than direct PCI parents */
parent = udev_device_get_parent(dev);
if (!parent || !streq("pci", udev_device_get_subsystem(parent)))
return -ENOENT;
dev_pci_onboard(dev, parent, prefix, test);
dev_pci_slot(dev, parent, prefix, test);
return 0;
}
static int dev_mac(struct udev_device *dev, const char *prefix, bool test) {
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 (!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;
/* add IEEE Organizationally Unique Identifier */
snprintf(str, sizeof(str), "OUI:%X%X%X", a1, a2, a3);
udev_builtin_hwdb_lookup(dev, str, test);
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);
}
static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) {
const char *s;
unsigned int i;
const char *devtype;
const char *prefix = "en";
/* handle only ARPHRD_ETHER devices */
s = udev_device_get_sysattr_value(dev, "type");
if (!s)
return EXIT_FAILURE;
i = strtoul(s, NULL, 0);
if (i != 1)
return 0;
devtype = udev_device_get_devtype(dev);
if (devtype) {
if (streq("wlan", devtype))
prefix = "wl";
else if (streq("wwan", devtype))
prefix = "ww";
}
dev_pci(dev, prefix, test);
dev_mac(dev, prefix, test);
return EXIT_SUCCESS;
}
const struct udev_builtin udev_builtin_net_id = {
.name = "net_id",
.cmd = builtin_net_id,
.help = "network device properties",
};