andorid usb网卡名分配过程
1、网卡驱动加载log
[ 142.122850][ T1830] read descriptors [ 142.127081][ T1830] read strings [ 142.194801][ T180] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller [ 142.203234][ T180] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 2 [ 142.215209][ T180] xhci-hcd xhci-hcd.2.auto: hcc params 0x0230fe65 hci version 0x110 quirks 0x0000002000010010 [ 142.225788][ T180] xhci-hcd xhci-hcd.2.auto: irq 275, io mem 0x0a600000 [ 142.235906][ T180] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10 [ 142.245278][ T180] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 142.253598][ T180] usb usb2: Product: xHCI Host Controller [ 142.259555][ T180] usb usb2: Manufacturer: Linux 5.10.149-qki-consolidate+ xhci-hcd [ 142.267630][ T180] usb usb2: SerialNumber: xhci-hcd.2.auto [ 142.277088][ T180] hub 2-0:1.0: USB hub found [ 142.282055][ T180] hub 2-0:1.0: 1 port detected [ 142.289970][ T180] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller [ 142.292212][ T167] i2c_geni a8c000.i2c: i2c error :-107 [ 142.298179][ T180] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 3 [ 142.302301][ T167] PM8008: pm8008_read: failed to read 0x0950 [ 142.311078][ T180] xhci-hcd xhci-hcd.2.auto: Host supports USB 3.0 SuperSpeed [ 142.317959][ T167] PM8008: _pm8008_chip_is_enabled: qcom,pm8008-chip-en: failed to get chip state rc=-107 [ 142.325707][ T180] usb usb3: We don't know the algorithms for LPM for this host, disabling LPM. [ 142.334785][ T167] PM8008: pm8008_chip_probe: Failed to register chip enable regulator rc=-107 [ 142.354889][ T180] usb usb3: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10 [ 142.364656][ T180] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 142.372942][ T180] usb usb3: Product: xHCI Host Controller [ 142.378935][ T180] usb usb3: Manufacturer: Linux 5.10.149-qki-consolidate+ xhci-hcd [ 142.387046][ T180] usb usb3: SerialNumber: xhci-hcd.2.auto [ 142.397574][ T180] hub 3-0:1.0: USB hub found [ 142.402879][ T180] hub 3-0:1.0: 1 port detected [ 142.413466][ T167] i2c_geni a8c000.i2c: i2c error :-107 [ 142.419305][ T167] PM8008: pm8008_read: failed to read 0x0950 [ 142.425552][ T167] PM8008: _pm8008_chip_is_enabled: qcom,pm8008-chip-en: failed to get chip state rc=-107 [ 142.436299][ T167] PM8008: pm8008_chip_probe: Failed to register chip enable regulator rc=-107 [ 142.540229][ T1357] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 143.090481][ T167] (virq:irq_count)- GICv3:IPI(1):144885 GICv3:arch_timer(11):134045 GICv3:IPI(6):55713 GICv3:IPI(2):51356 GICv3:ufshcd(141):35443 ipcc:glink-native-adsp(330):9803 GICv3:ipcc_0(137):9714 GICv3:apps_rsc(132):6943 ipcc:glink-native-modem(346):2238 GICv3:virtio_dev_11(354):2237 [ 143.118348][ T167] (cpu:irq_count)- 0:106796 1:52994 2:54457 3:51558 4:27889 5:26610 6:74306 7:67015 [ 143.128489][ T167] (ipi:irq_count)- 0:144885 1:51356 2:0 3:0 4:0 5:55713 6:0 [ 143.289535][ T33] usb 3-1: new SuperSpeed Gen 1 USB device number 2 using xhci-hcd [ 143.333240][ T33] usb 3-1: New USB device found, idVendor=0bda, idProduct=8156, bcdDevice=31.04 [ 143.343024][ T33] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=6 [ 143.352141][ T33] usb 3-1: Product: USB 10/100/1G/2.5G LAN [ 143.358409][ T33] usb 3-1: Manufacturer: Realtek [ 143.363717][ T33] usb 3-1: SerialNumber: 401000001 [ 143.468414][ T33] [ 143.468414][ T33] ****usbnet_probe******** [ 143.512630][ T33] cdc_ncm 3-1:2.0: MAC-Address: 08:26:ae:38:1d:dd [ 143.519687][ T33] cdc_ncm 3-1:2.0: setting rx_max = 16384 [ 143.527874][ T33] cdc_ncm 3-1:2.0: setting tx_max = 16384 [ 143.535113][ T33] [ 143.535113][ T33] ***usbnet_probe***net->name=eth%d****** [ 143.577286][ T33] cdc_ncm 3-1:2.0 eth0: register 'cdc_ncm' at usb-xhci-hcd.2.auto-1, CDC NCM, 08:26:ae:38:1d:dd [ 143.590355][ T204] i2c_geni a8c000.i2c: i2c error :-107 [ 143.597185][ T204] PM8008: pm8008_read: failed to read 0x0950 [ 143.603758][ T204] PM8008: _pm8008_chip_is_enabled: qcom,pm8008-chip-en: failed to get chip state rc=-107 [ 143.613847][ T204] PM8008: pm8008_chip_probe: Failed to register chip enable regulator rc=-107 [ 143.616747][ T33] cdc_ncm 3-1:2.0 eth0: unregister 'cdc_ncm' usb-xhci-hcd.2.auto-1, CDC NCM [ 143.625415][ T204] i2c_geni a8c000.i2c: i2c error :-107 [ 143.637604][ T204] PM8008: pm8008_read: failed to read 0x0950 [ 143.644118][ T204] PM8008: _pm8008_chip_is_enabled: qcom,pm8008-chip-en: failed to get chip state rc=-107 [ 143.654141][ T204] PM8008: pm8008_chip_probe: Failed to register chip enable regulator rc=-107 [ 143.976241][ T33] r8152-cfgselector 3-1: reset SuperSpeed Gen 1 USB device number 2 using xhci-hcd [ 144.423201][ T33] r8152 3-1:1.0 (unnamed net_device) (uninitialized): netif_napi_add() called with weight 256 [ 144.480728][ T33] r8152 3-1:1.0 eth0: v2.17.1 (2023/06/13) [ 144.482018][ T250] selinux: SELinux: Could not stat /sys/devices/platform/soc/a600000.ssusb/a600000.dwc3/xhci-hcd.2.auto/usb3/3-1/wakeup/wakeup53: No such file or directory. [ 144.486920][ T33] r8152 3-1:1.0 eth0: This product is covered by one or more of the following patents: [ 144.486920][ T33] US6,570,884, US6,115,776, and US6,327,625. [ 144.486920][ T33] [ 144.493933][ T204] i2c_geni a8c000.i2c: i2c error :-107 [ 144.522368][ T250] selinux: [ 144.527619][ T204] PM8008: pm8008_read: failed to read 0x0950
2、网名分配调用接口的过程
usbnet_probe--》register_netdev—————》register_netdevice---》dev_get_valid_name--》dev_alloc_name_ns--->__dev_alloc_name
static int __dev_alloc_name(struct net *net, const char *name, char *buf)
{
int i = 0;
const char *p;
const int max_netdevices = 8*PAGE_SIZE;
unsigned long *inuse;
struct net_device *d;
if (!dev_valid_name(name))
return -EINVAL;
p = strchr(name, '%');
if (p) {
/*
* Verify the string as this thing may have come from
* the user. There must be either one "%d" and no other "%"
* characters.
*/
if (p[1] != 'd' || strchr(p + 2, '%'))
return -EINVAL;
/* Use one page as a bit array of possible slots */
inuse = (unsigned long *) get_zeroed_page(GFP_ATOMIC);
if (!inuse)
return -ENOMEM;
for_each_netdev(net, d) {
struct netdev_name_node *name_node;
list_for_each_entry(name_node, &d->name_node->list, list) {
if (!sscanf(name_node->name, name, &i))
continue;
if (i < 0 || i >= max_netdevices)
continue;
/* avoid cases where sscanf is not exact inverse of printf */
snprintf(buf, IFNAMSIZ, name, i);
if (!strncmp(buf, name_node->name, IFNAMSIZ))
set_bit(i, inuse);
}
if (!sscanf(d->name, name, &i))
continue;
if (i < 0 || i >= max_netdevices)
continue;
/* avoid cases where sscanf is not exact inverse of printf */
snprintf(buf, IFNAMSIZ, name, i);
if (!strncmp(buf, d->name, IFNAMSIZ))
set_bit(i, inuse);
}
i = find_first_zero_bit(inuse, max_netdevices);
free_page((unsigned long) inuse);
}
snprintf(buf, IFNAMSIZ, name, i);
if (!__dev_get_by_name(net, buf))
return i;
/* It is possible to run out of possible slots
* when the name is long and there isn't enough space left
alloc_etherdev_mqs--》alloc_netdev_mqs---》
struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
unsigned int rxqs)
{
return alloc_netdev_mqs(sizeof_priv, "eth%d", NET_NAME_UNKNOWN,
ether_setup, txqs, rxqs);
}
