![udev:PCIe 4G 网络设备的规则问题](https://linux22.com/image/158957/udev%EF%BC%9APCIe%204G%20%E7%BD%91%E7%BB%9C%E8%AE%BE%E5%A4%87%E7%9A%84%E8%A7%84%E5%88%99%E9%97%AE%E9%A2%98.png)
我的规则的目标是将网络接口从“eth0”(或其他)重命名为“gsm0”,并根据我们用来发出 AT 命令的设备创建一个符号链接 /dev/ATCMD 到 /dev/ttyUSBX。
我制定了这个规则:
SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}!="02", GOTO="symlink_huaweiME909_end"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="15c1", SYMLINK+="ATCMD"
LABEL="symlink_huaweiME909_end"
SUBSYSTEM=="net", ACTION=="add", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="15c1", NAME="gsm0"
界面的重命名效果很好,但对于符号链接部分,它仅在启动时起作用。如果我手动关闭 gsm0 接口并再次打开它,符号链接将不再重定向到 /dev/ttyUSBX。它来自:
lrwxrwxrwx 1 root root 7 Jan 1 1970 ATCMD -> ttyUSB0
到 :
lrwxrwxrwx 1 root root 15 Aug 14 11:03 ATCMD -> bus/usb/001/006
命令 udevadm info -a -p $(udevadm info -q path -n /dev/ttyUSB0) 给我:
looking at device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:2.2/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:2.2/ttyUSB0':
KERNELS=="ttyUSB0"
SUBSYSTEMS=="usb-serial"
DRIVERS=="option1"
ATTRS{port_number}=="0"
looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1:2.2':
KERNELS=="1-1:2.2"
SUBSYSTEMS=="usb"
DRIVERS=="option"
ATTRS{interface}=="Huawei Mobile Connect - Modem"
ATTRS{bInterfaceProtocol}=="10"
ATTRS{bInterfaceNumber}=="02"
ATTRS{bInterfaceSubClass}=="06"
ATTRS{bInterfaceClass}=="ff"
ATTRS{bAlternateSetting}==" 0"
ATTRS{authorized}=="1"
ATTRS{bNumEndpoints}=="03"
ATTRS{supports_autosuspend}=="1"
looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
KERNELS=="1-1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceClass}=="00"
ATTRS{rx_lanes}=="1"
ATTRS{manufacturer}=="Huawei Technologies Co., Ltd."
ATTRS{bmAttributes}=="a0"
ATTRS{bConfigurationValue}=="2"
ATTRS{version}==" 2.00"
ATTRS{devnum}=="2"
ATTRS{bMaxPower}=="2mA"
ATTRS{idProduct}=="15c1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{urbnum}=="953"
ATTRS{bDeviceSubClass}=="00"
ATTRS{maxchild}=="0"
ATTRS{bcdDevice}=="0102"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{idVendor}=="12d1"
ATTRS{product}=="HUAWEI Mobile V7R11"
ATTRS{speed}=="480"
ATTRS{removable}=="unknown"
ATTRS{ltm_capable}=="no"
ATTRS{serial}=="0123456789ABCDEF"
ATTRS{bNumConfigurations}=="3"
ATTRS{busnum}=="1"
ATTRS{authorized}=="1"
ATTRS{tx_lanes}=="1"
ATTRS{quirks}=="0x0"
ATTRS{configuration}==""
ATTRS{devpath}=="1"
ATTRS{bDeviceProtocol}=="ff"
ATTRS{bNumInterfaces}==" 7"
looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceClass}=="09"
ATTRS{rx_lanes}=="1"
ATTRS{manufacturer}=="Linux 4.19.57 dwc_otg_hcd"
ATTRS{bmAttributes}=="e0"
ATTRS{bConfigurationValue}=="1"
ATTRS{version}==" 2.00"
ATTRS{devnum}=="1"
ATTRS{bMaxPower}=="0mA"
ATTRS{idProduct}=="0002"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{urbnum}=="25"
ATTRS{bDeviceSubClass}=="00"
ATTRS{maxchild}=="1"
ATTRS{bcdDevice}=="0419"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{idVendor}=="1d6b"
ATTRS{product}=="DWC OTG Controller"
ATTRS{speed}=="480"
ATTRS{authorized_default}=="1"
ATTRS{interface_authorized_default}=="1"
ATTRS{removable}=="unknown"
ATTRS{ltm_capable}=="no"
ATTRS{serial}=="3f980000.usb"
ATTRS{bNumConfigurations}=="1"
ATTRS{busnum}=="1"
ATTRS{authorized}=="1"
ATTRS{tx_lanes}=="1"
ATTRS{quirks}=="0x0"
ATTRS{configuration}==""
ATTRS{devpath}=="0"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bNumInterfaces}==" 1"
以及此后的一些事情。
感谢您的帮助!
EDIT1:此规则在内核 4.1 上完美运行,但在 4.19 上有此问题
答案1
我按如下方式修改了我的规则,现在它正在发挥作用。因此,我在内核 4.1 上使用上述规则,在 4.19 上使用以下规则:
SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}!="02", GOTO="symlink_huaweiME909_end"
SUBSYSTEM=="tty", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="15c1", SYMLINK+="ATCMD"
LABEL="symlink_huaweiME909_end"
SUBSYSTEM=="net", ACTION=="add", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="15c1", NAME="gsm0"