* - physical/geographical location of the hardware
* - the interface's MAC address
*
- * http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames
+ * https://systemd.io/PREDICTABLE_INTERFACE_NAMES
*
- * Two character prefixes based on the type of interface:
- * en — Ethernet
- * ib — InfiniBand
- * 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.
- *
- * SR-IOV virtual devices are named based on the name of the parent interface,
- * with a suffix of "v<N>", where <N> is the virtual device number.
- *
- * 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
- *
- * PCI IB host adapter with 2 ports:
- * /sys/devices/pci0000:00/0000:00:03.0/0000:15:00.0/net/ibp21s0f0
- * ID_NET_NAME_PATH=ibp21s0f0
- * /sys/devices/pci0000:00/0000:00:03.0/0000:15:00.1/net/ibp21s0f1
- * ID_NET_NAME_PATH=ibp21s0f1
- *
- * 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
+ * When the code here is changed, man/systemd.net-naming-scheme.xml must be updated too.
*/
#include <errno.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/if.h>
#include <linux/pci_regs.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
-#include "naming-scheme.h"
+#include "netif-naming-scheme.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "stdio-util.h"
NET_CCW,
NET_VIO,
NET_PLATFORM,
+ NET_NETDEVSIM,
};
struct netnames {
bool mac_valid;
sd_device *pcidev;
- char pci_slot[IFNAMSIZ];
- char pci_path[IFNAMSIZ];
- char pci_onboard[IFNAMSIZ];
+ char pci_slot[ALTIFNAMSIZ];
+ char pci_path[ALTIFNAMSIZ];
+ char pci_onboard[ALTIFNAMSIZ];
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];
+ 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[IFNAMSIZ];
+ char suffix[ALTIFNAMSIZ];
};
/* skip intermediate virtio devices */
_cleanup_free_ char *virtfn_pci_syspath = NULL;
struct dirent *dent;
_cleanup_closedir_ DIR *dir = NULL;
- char suffix[IFNAMSIZ];
+ char suffix[ALTIFNAMSIZ];
int r;
assert(dev);
/* Check if this is a virtual function. */
physfn_link_file = strjoina(syspath, "/physfn");
- r = chase_symlinks(physfn_link_file, NULL, 0, &physfn_pci_syspath);
+ r = chase_symlinks(physfn_link_file, NULL, 0, &physfn_pci_syspath, NULL);
if (r < 0)
return r;
if (!startswith(dent->d_name, "virtfn"))
continue;
- virtfn_link_file = strjoin(physfn_pci_syspath, "/", dent->d_name);
+ 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) < 0)
+ if (chase_symlinks(virtfn_link_file, NULL, 0, &virtfn_pci_syspath, NULL) < 0)
continue;
if (streq(syspath, virtfn_pci_syspath)) {
char *s;
int r;
- /* ACPI _DSM — device specific method for naming a PCI or PCI Express device */
+ /* 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 (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 his crap for us, but it doesn't currently. */
+ /* 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;
char str[PATH_MAX];
_cleanup_free_ char *address = NULL;
- if (dent->d_name[0] == '.')
+ if (dot_or_dot_dot(dent->d_name))
continue;
+
r = safe_atou_full(dent->d_name, 10, &i);
if (r < 0 || i <= 0)
continue;
* The Vendor (3 or 4 char), followed by hexdecimal model number : instance id.
*/
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+ DISABLE_WARNING_FORMAT_NONLITERAL;
if (sscanf(syspath, pattern, vendor, &model, &instance, ðid) != 4)
return -EINVAL;
-#pragma GCC diagnostic pop
+ REENABLE_WARNING;
if (!in_charset(vendor, validchars))
return -ENOENT;
if (r < 0)
return r;
- /* 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...
+ /* 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 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];
r = names_mac(dev, &names);
if (r >= 0 && names.mac_valid) {
- char str[IFNAMSIZ];
+ char str[ALTIFNAMSIZ];
xsprintf(str, "%sx%02x%02x%02x%02x%02x%02x", prefix,
names.mac[0], names.mac[1], names.mac[2],
/* get path names for Linux on System z network devices */
if (names_ccw(dev, &names) >= 0 && names.type == NET_CCW) {
- char str[IFNAMSIZ];
+ 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);
/* get ibmveth/ibmvnic slot-based names. */
if (names_vio(dev, &names) >= 0 && names.type == NET_VIO) {
- char str[IFNAMSIZ];
+ 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);
/* get ACPI path names for ARM64 platform devices */
if (names_platform(dev, &names, test) >= 0 && names.type == NET_PLATFORM) {
- char str[IFNAMSIZ];
+ 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[IFNAMSIZ];
+ 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", prefix, 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] &&
/* USB device */
if (names_usb(dev, &names) >= 0 && names.type == NET_USB) {
- char str[IFNAMSIZ];
+ char str[ALTIFNAMSIZ];
if (names.pci_path[0] &&
snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.usb_ports))
/* Broadcom bus */
if (names_bcma(dev, &names) >= 0 && names.type == NET_BCMA) {
- char str[IFNAMSIZ];
+ char str[ALTIFNAMSIZ];
if (names.pci_path[0] &&
snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.bcma_core))
return 0;
}
-const struct udev_builtin udev_builtin_net_id = {
+const UdevBuiltin udev_builtin_net_id = {
.name = "net_id",
.cmd = builtin_net_id,
.help = "Network device properties",
projects / thirdparty / systemd.git / blobdiff