*
* Two character prefixes based on the type of interface:
* en -- ethernet
+ * sl -- serial line IP (slip)
* wl -- wlan
* ww -- wwan
*
* Type of names:
+ * b<number> -- BCMA bus core number
+ * ccw<name> -- CCW bus group name
* o<index> -- on-board device index number
- * s<slot>[f<function>][d<dev_id>] -- hotplug slot index number
+ * s<slot>[f<function>][d<dev_port>] -- hotplug slot index number
* x<MAC> -- MAC address
- * [P<domain>]p<bus>s<slot>[f<function>][d<dev_id>]
+ * [P<domain>]p<bus>s<slot>[f<function>][d<dev_port>]
* -- PCI geographical location
* [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
* -- USB port number chain
#include <string.h>
#include <errno.h>
#include <net/if.h>
+#include <net/if_arp.h>
#include <linux/pci_regs.h>
#include "udev.h"
NET_PCI,
NET_USB,
NET_BCMA,
+ NET_VIRTIO,
+ NET_CCWGROUP,
};
struct netnames {
const char *pci_onboard_label;
char usb_ports[IFNAMSIZ];
-
char bcma_core[IFNAMSIZ];
+ char ccw_group[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 = NULL;
- char config[64];
- bool multi = false;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *filename;
+ uint8_t config[64];
- snprintf(filename, sizeof(filename), "%s/config", udev_device_get_syspath(dev));
+ filename = strappenda(udev_device_get_syspath(dev), "/config");
f = fopen(filename, "re");
if (!f)
- goto out;
+ return false;
if (fread(&config, sizeof(config), 1, f) != 1)
- goto out;
+ return false;
/* bit 0-6 header type, bit 7 multi/single function device */
if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
- multi = true;
-out:
- if (f)
- fclose(f);
- return multi;
+ return true;
+
+ return false;
}
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_id = 0;
+ unsigned domain, bus, slot, func, dev_port = 0;
size_t l;
char *s;
const char *attr;
return -ENOENT;
/* kernel provided multi-device index */
- attr = udev_device_get_sysattr_value(dev, "dev_id");
+ attr = udev_device_get_sysattr_value(dev, "dev_port");
if (attr)
- dev_id = strtol(attr, NULL, 16);
+ dev_port = strtol(attr, NULL, 10);
/* compose a name based on the raw kernel's PCI bus, slot numbers */
s = names->pci_path;
l = strpcpyf(&s, l, "p%ds%d", bus, slot);
if (func > 0 || is_pci_multifunction(names->pcidev))
l = strpcpyf(&s, l, "f%d", func);
- if (dev_id > 0)
- l = strpcpyf(&s, l, "d%d", dev_id);
+ if (dev_port > 0)
+ l = strpcpyf(&s, l, "d%d", dev_port);
if (l == 0)
names->pci_path[0] = '\0';
l = strpcpyf(&s, l, "s%d", hotplug_slot);
if (func > 0 || is_pci_multifunction(names->pcidev))
l = strpcpyf(&s, l, "f%d", func);
- if (dev_id > 0)
- l = strpcpyf(&s, l, "d%d", dev_id);
+ if (dev_port > 0)
+ l = strpcpyf(&s, l, "d%d", dev_port);
if (l == 0)
names->pci_path[0] = '\0';
}
return 0;
}
+static int names_ccw(struct udev_device *dev, struct netnames *names) {
+ struct udev_device *cdev;
+ const char *bus_id;
+ size_t bus_id_len;
+ int rc;
+
+ /* Retrieve the associated CCW device */
+ cdev = udev_device_get_parent(dev);
+ if (!cdev)
+ return -ENOENT;
+
+ /* Network devices are always grouped CCW devices */
+ if (!streq_ptr("ccwgroup", udev_device_get_subsystem(cdev)))
+ return -ENOENT;
+
+ /* Retrieve bus-ID of the grouped 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;
+
+ /* Store the CCW bus-ID for use as network device name */
+ rc = snprintf(names->ccw_group, sizeof(names->ccw_group), "ccw%s", bus_id);
+ if (rc >= 0 && rc < (int)sizeof(names->ccw_group))
+ names->type = NET_CCWGROUP;
+ return 0;
+}
+
static int names_mac(struct udev_device *dev, struct netnames *names) {
const char *s;
unsigned int i;
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");
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_CCWGROUP) {
+ char str[IFNAMSIZ];
+
+ if (snprintf(str, sizeof(str), "%s%s", prefix, names.ccw_group) < (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)
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
goto out;
}
-
out:
return EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff