概述
作者
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参考
linux网卡命名规则
Linux重命名网卡名称
Linux网卡命名enp3s0说明
Linux Ubuntu 修改网卡名字
Predictable Network Interface Names
systemd/src/udev/udev-builtin-net_id.c
redhat修改网卡名称
linux修改网卡名称（一般修改为eth0）（redHat7）
centos7/redhat7更改网卡名称为eth0
Linux系统修改网卡名称（eth1修改为eth0）
ubuntu
$ sudo vim /etc/default/grub
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"
$ sudo apt-get install grub2-common
$ sudo update-grub
$ sudo vim /etc/network/interfaces
另外一种需要编辑/etc/udev/rules.d/70-persistent-net.rules，例如，ATTR{address}=="bc:30:5b:9c:ae:79" 表示MAC地址，KERNEL=="eth*" 是原网卡名，NAME="eth0" 更改网卡名。
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="bc:30:5b:b1:cd:be", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
systemd，
/* retrieve on-board index number and label from firmware */
static int dev_pci_onboard(sd_device *dev, struct netnames *names) {
unsigned long idx, dev_port = 0;
const char *attr, *port_name = NULL;
size_t l;
char *s;
int r;
/* 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 (r < 0)
return r;
}
r = safe_atolu(attr, &idx);
if (r < 0)
return r;
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. */
if (idx > ONBOARD_INDEX_MAX)
return -ENOENT;
/* kernel provided port index for multiple ports on a single PCI function */
if (sd_device_get_sysattr_value(dev, "dev_port", &attr) >= 0)
dev_port = strtoul(attr, NULL, 10);
/* kernel provided front panel port name for multiple port PCI device */
(void) sd_device_get_sysattr_value(dev, "phys_port_name", &port_name);
s = names->pci_onboard;
l = sizeof(names->pci_onboard);
l = strpcpyf(&s, l, "o%lu", idx);
if (port_name)
l = strpcpyf(&s, l, "n%s", port_name);
else if (dev_port > 0)
l = strpcpyf(&s, l, "d%lu", dev_port);
if (l == 0)
names->pci_onboard[0] = ' ';
if (sd_device_get_sysattr_value(names->pcidev, "label", &names->pci_onboard_label) < 0)
names->pci_onboard_label = NULL;
return 0;
}
嵌入式平台
开机打印，
[ 1.062029] macb ff0b0000.ethernet eth0: Cadence GEM rev 0x50070106 at 0xff0b0000 irq 30 (1e:44:19:4f:f0:07)
[ 1.071658] Atheros 8031 ethernet ff0b0000.ethernet-ffffffff:01: attached PHY driver [Atheros 8031 ethernet] (mii_bus:phy_addr=ff0b0000.ethernet-ffffffff:01, irq=POLL)
[ 1.087025] macb ff0d0000.ethernet: Not enabling partial store and forward
[ 1.094189] libphy: MACB_mii_bus: probed
[ 1.169628] macb ff0d0000.ethernet eth1: Cadence GEM rev 0x50070106 at 0xff0d0000 irq 31 (52:76:2c:f7:02:65)
[ 1.179262] Xilinx ZynqMP PS PCS/PMA PHY ff0d0000.ethernet-ffffffff:01: attached PHY driver [Xilinx ZynqMP PS PCS/PMA PHY] (mii_bus:phy_addr=ff0d0000.ethernet-ffffffff:01, irq=POLL)
[ 1.195810] macb ff0e0000.ethernet: Not enabling partial store and forward
[ 1.202964] libphy: MACB_mii_bus: probed
[ 1.277627] macb ff0e0000.ethernet eth2: Cadence GEM rev 0x50070106 at 0xff0e0000 irq 32 (be:79:46:c8:71:fd)
[ 1.287261] Xilinx ZynqMP PS PCS/PMA PHY ff0e0000.ethernet-ffffffff:01: attached PHY driver [Xilinx ZynqMP PS PCS/PMA PHY] (mii_bus:phy_addr=ff0e0000.ethernet-ffffffff:01, irq=POLL)
这里的mii_bus:phy_addr=ff0e0000.ethernet-ffffffff:01，是下面打印的，
void phy_attached_info(struct phy_device *phydev)
{
phy_attached_print(phydev, NULL);
}
EXPORT_SYMBOL(phy_attached_info);
#define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
{
const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
char *irq_str;
char irq_num[8];
switch(phydev->irq) {
case PHY_POLL:
irq_str = "POLL";
break;
case PHY_IGNORE_INTERRUPT:
irq_str = "IGNORE";
break;
default:
snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
irq_str = irq_num;
break;
}
if (!fmt) {
dev_info(&phydev->mdio.dev, ATTACHED_FMT "n",
drv_name, phydev_name(phydev),
irq_str);
} else {
va_list ap;
dev_info(&phydev->mdio.dev, ATTACHED_FMT,
drv_name, phydev_name(phydev),
irq_str);
va_start(ap, fmt);
vprintk(fmt, ap);
va_end(ap);
}
}
EXPORT_SYMBOL(phy_attached_print);
其中phydev_name来源于mii_bus注册的名字，而ffffffff就是platform_device的id没设，获取aliases id给这个变量即可。
static inline const char *phydev_name(const struct phy_device *phydev)
{
return dev_name(&phydev->mdio.dev);
}
static int macb_mii_init(struct macb *bp)
{
...
bp->mii_bus->name = "MACB_mii_bus";
if (bp->int_pcs) {
bp->mii_bus->read = &zynqmp_ps_pcs_read;
bp->mii_bus->write = &zynqmp_ps_pcs_write;
} else {
bp->mii_bus->read = &macb_mdio_read;
bp->mii_bus->write = &macb_mdio_write;
}
snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
bp->pdev->name, bp->pdev->id);
bp->mii_bus->priv = bp;
bp->mii_bus->parent = &bp->dev->dev;
...
}
struct platform_device {
const char *name;
int id;
bool id_auto;
struct device dev;
u32 num_resources;
struct resource *resource;
const struct platform_device_id *id_entry;
char *driver_override; /* Driver name to force a match */
/* MFD cell pointer */
struct mfd_cell *mfd_cell;
/* arch specific additions */
struct pdev_archdata archdata;
};
最后
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