* - 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
* wl -- wlan
* o<index> -- on-board device index number
* s<slot>[f<function>][d<dev_id>] -- hotplug slot index number
* x<MAC> -- MAC address
- * p<bus>s<slot>[f<function>][d<dev_id>] -- PCI geographical location
- * p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
+ * [P<domain>]p<bus>s<slot>[f<function>][d<dev_id>]
+ * -- PCI geographical location
+ * [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
* -- USB port number chain
*
* 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.
#include <linux/pci_regs.h>
#include "udev.h"
+#include "fileio.h"
enum netname_type{
NET_UNDEF,
NET_PCI,
NET_USB,
+ NET_BCMA,
};
struct netnames {
char pci_onboard[IFNAMSIZ];
const char *pci_onboard_label;
- struct udev_device *usbdev;
char usb_ports[IFNAMSIZ];
+
+ char bcma_core[IFNAMSIZ];
};
/* retrieve on-board index number and label from firmware */
/* read the 256 bytes PCI configuration space to check the multi-function bit */
static bool is_pci_multifunction(struct udev_device *dev) {
char filename[256];
- FILE *f;
+ FILE *f = NULL;
char config[64];
bool multi = false;
if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
multi = true;
out:
- fclose(f);
+ if (f)
+ fclose(f);
return multi;
}
static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
struct udev *udev = udev_device_get_udev(names->pcidev);
- unsigned int bus;
- unsigned int slot;
- unsigned int func;
- unsigned int dev_id = 0;
+ unsigned domain, bus, slot, func, dev_id = 0;
size_t l;
char *s;
const char *attr;
struct udev_device *pci = NULL;
- char slots[256];
- DIR *dir;
+ char slots[256], str[256];
+ _cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
- char str[256];
- int hotplug_slot = 0;
- int err = 0;
+ int hotplug_slot = 0, err = 0;
- if (sscanf(udev_device_get_sysname(names->pcidev), "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;
/* kernel provided multi-device index */
/* compose a name based on the raw kernel's PCI bus, slot numbers */
s = names->pci_path;
- l = util_strpcpyf(&s, sizeof(names->pci_path), "p%ds%d", bus, slot);
+ l = sizeof(names->pci_path);
+ if (domain > 0)
+ l = strpcpyf(&s, l, "P%d", domain);
+ l = strpcpyf(&s, l, "p%ds%d", bus, slot);
if (func > 0 || is_pci_multifunction(names->pcidev))
- l = util_strpcpyf(&s, l, "f%d", func);
+ l = strpcpyf(&s, l, "f%d", func);
if (dev_id > 0)
- l = util_strpcpyf(&s, l, "d%d", dev_id);
+ l = strpcpyf(&s, l, "d%d", dev_id);
if (l == 0)
names->pci_path[0] = '\0';
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(names->pcidev), 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) {
s = names->pci_slot;
- l = util_strpcpyf(&s, sizeof(names->pci_slot), "s%d", hotplug_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 = util_strpcpyf(&s, l, "f%d", func);
+ l = strpcpyf(&s, l, "f%d", func);
if (dev_id > 0)
- l = util_strpcpyf(&s, l, "d%d", dev_id);
+ l = strpcpyf(&s, l, "d%d", dev_id);
if (l == 0)
names->pci_path[0] = '\0';
}
if (!parent)
return -ENOENT;
/* check if our direct parent is a PCI device with no other bus in-between */
- if (streq("pci", udev_device_get_subsystem(parent))) {
+ if (streq_ptr("pci", udev_device_get_subsystem(parent))) {
names->type = NET_PCI;
names->pcidev = parent;
} else {
}
static int names_usb(struct udev_device *dev, struct netnames *names) {
+ struct udev_device *usbdev;
char name[256];
char *ports;
char *config;
size_t l;
char *s;
- names->usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
- if (!names->usbdev)
+ usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
+ if (!usbdev)
return -ENOENT;
/* get USB port number chain, configuration, interface */
- util_strscpy(name, sizeof(name), udev_device_get_sysname(names->usbdev));
+ strscpy(name, sizeof(name), udev_device_get_sysname(usbdev));
s = strchr(name, '-');
if (!s)
return -EINVAL;
while ((s = strchr(s, '.')))
s[0] = 'u';
s = names->usb_ports;
- l = util_strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL);
+ l = strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL);
/* append USB config number, suppress the common config == 1 */
if (!streq(config, "1"))
- l = util_strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL);
+ l = strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL);
/* append USB interface number, suppress the interface == 0 */
if (!streq(interf, "0"))
- l = util_strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL);
+ l = strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL);
if (l == 0)
return -ENAMETOOLONG;
return 0;
}
+static int names_bcma(struct udev_device *dev, struct netnames *names) {
+ struct udev_device *bcmadev;
+ unsigned int core;
+
+ 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)
+ snprintf(names->bcma_core, sizeof(names->bcma_core), "b%u", core);
+
+ names->type = NET_BCMA;
+ return 0;
+}
+
static int names_mac(struct udev_device *dev, struct netnames *names) {
const char *s;
unsigned int i;
snprintf(str, sizeof(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, str, test);
+ udev_builtin_hwdb_lookup(dev, NULL, str, NULL, test);
return 0;
}
unsigned int i;
const char *devtype;
const char *prefix = "en";
- struct netnames names;
+ struct netnames names = {};
int err;
/* handle only ARPHRD_ETHER devices */
p = udev_device_get_sysattr_value(dev, "iflink");
if (!p)
return EXIT_FAILURE;
- if (strcmp(s, p) != 0)
+ if (!streq(s, p))
return 0;
devtype = udev_device_get_devtype(dev);
prefix = "ww";
}
- zero(names);
err = names_mac(dev, &names);
if (err >= 0 && names.mac_valid) {
char str[IFNAMSIZ];
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;
}
~ianmdlvl / elogind.git / blobdiff