通过集线器创建到 USB 设备的符号链接的 Udev 规则
Udev Rule to Create SymLink to USB Device Through Hub
我正在尝试为通过 USB 集线器的设备创建 SymLink,我认为这会导致我的问题。我试过下面的 udev 规则,但只有第一个在我插入时找到设备。虽然它找到了它,但它链接到 /dev/bus/usb/001/020 而不是 /dev/ttyUSB0。我的规则应该是什么样子才能为该设备获取正确的 SymLink?
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
SUBSYSTEM=="tty", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
KERNEL=="ttyUSB*", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
输出自"udevadm info --attribute-walk --name /dev/ttyUSB0":
looking at device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/ttyUSB0':
KERNELS=="ttyUSB0"
SUBSYSTEMS=="usb-serial"
DRIVERS=="ftdi_sio"
ATTRS{latency_timer}=="16"
ATTRS{port_number}=="0"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0':
KERNELS=="1-4:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="ftdi_sio"
ATTRS{authorized}=="1"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceClass}=="ff"
ATTRS{bInterfaceNumber}=="00"
ATTRS{bInterfaceProtocol}=="ff"
ATTRS{bInterfaceSubClass}=="ff"
ATTRS{bNumEndpoints}=="02"
ATTRS{interface}=="USB <-> Serial Cable"
ATTRS{supports_autosuspend}=="1"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4':
KERNELS=="1-4"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{authorized}=="1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{bConfigurationValue}=="1"
ATTRS{bDeviceClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{bMaxPower}=="100mA"
ATTRS{bNumConfigurations}=="1"
ATTRS{bNumInterfaces}==" 4"
ATTRS{bcdDevice}=="0800"
ATTRS{bmAttributes}=="80"
ATTRS{busnum}=="1"
ATTRS{configuration}==""
ATTRS{devnum}=="29"
ATTRS{devpath}=="4"
ATTRS{idProduct}=="6011"
ATTRS{idVendor}=="0403"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="FTDI"
ATTRS{maxchild}=="0"
ATTRS{product}=="USB <-> Serial Cable"
ATTRS{quirks}=="0x0"
ATTRS{removable}=="removable"
ATTRS{serial}=="FT1RAIYI"
ATTRS{speed}=="480"
ATTRS{urbnum}=="23"
ATTRS{version}==" 2.00"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{authorized}=="1"
ATTRS{authorized_default}=="1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{bConfigurationValue}=="1"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{bMaxPower}=="0mA"
ATTRS{bNumConfigurations}=="1"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bcdDevice}=="0415"
ATTRS{bmAttributes}=="e0"
ATTRS{busnum}=="1"
ATTRS{configuration}==""
ATTRS{devnum}=="1"
ATTRS{devpath}=="0"
ATTRS{idProduct}=="0002"
ATTRS{idVendor}=="1d6b"
ATTRS{interface_authorized_default}=="1"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Linux 4.15.0-33-generic xhci-hcd"
ATTRS{maxchild}=="16"
ATTRS{product}=="xHCI Host Controller"
ATTRS{quirks}=="0x0"
ATTRS{removable}=="unknown"
ATTRS{serial}=="0000:00:14.0"
ATTRS{speed}=="480"
ATTRS{urbnum}=="1232"
ATTRS{version}==" 2.00"
looking at parent device '/devices/pci0000:00/0000:00:14.0':
KERNELS=="0000:00:14.0"
SUBSYSTEMS=="pci"
DRIVERS=="xhci_hcd"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x0c0330"
ATTRS{consistent_dma_mask_bits}=="64"
ATTRS{d3cold_allowed}=="1"
ATTRS{dbc}=="disabled"
ATTRS{device}=="0xa12f"
ATTRS{dma_mask_bits}=="64"
ATTRS{driver_override}=="(null)"
ATTRS{enable}=="1"
ATTRS{irq}=="122"
ATTRS{local_cpulist}=="0-7"
ATTRS{local_cpus}=="ff"
ATTRS{msi_bus}=="1"
ATTRS{numa_node}=="-1"
ATTRS{revision}=="0x31"
ATTRS{subsystem_device}=="0x06d9"
ATTRS{subsystem_vendor}=="0x1028"
ATTRS{vendor}=="0x8086"
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""
我终于通过"S"意识到属性的差异。所以我可以匹配一个更高的级别以及特定的低级别。因此 SUBSYSTEM 可以保留 tty 但随后搜索 ATTRS 而不是 ATTR。
所以我只需要将这一行添加到一个新文件中 /etc/udev/rules.d/95-custom.rules
:
SUBSYSTEM=="tty", ACTION=="add", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
我正在尝试为通过 USB 集线器的设备创建 SymLink,我认为这会导致我的问题。我试过下面的 udev 规则,但只有第一个在我插入时找到设备。虽然它找到了它,但它链接到 /dev/bus/usb/001/020 而不是 /dev/ttyUSB0。我的规则应该是什么样子才能为该设备获取正确的 SymLink?
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
SUBSYSTEM=="tty", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
KERNEL=="ttyUSB*", ACTION=="add", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", SYMLINK+="ttyGpsSerial"
输出自"udevadm info --attribute-walk --name /dev/ttyUSB0":
looking at device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/ttyUSB0':
KERNELS=="ttyUSB0"
SUBSYSTEMS=="usb-serial"
DRIVERS=="ftdi_sio"
ATTRS{latency_timer}=="16"
ATTRS{port_number}=="0"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0':
KERNELS=="1-4:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="ftdi_sio"
ATTRS{authorized}=="1"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceClass}=="ff"
ATTRS{bInterfaceNumber}=="00"
ATTRS{bInterfaceProtocol}=="ff"
ATTRS{bInterfaceSubClass}=="ff"
ATTRS{bNumEndpoints}=="02"
ATTRS{interface}=="USB <-> Serial Cable"
ATTRS{supports_autosuspend}=="1"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-4':
KERNELS=="1-4"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{authorized}=="1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{bConfigurationValue}=="1"
ATTRS{bDeviceClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{bMaxPower}=="100mA"
ATTRS{bNumConfigurations}=="1"
ATTRS{bNumInterfaces}==" 4"
ATTRS{bcdDevice}=="0800"
ATTRS{bmAttributes}=="80"
ATTRS{busnum}=="1"
ATTRS{configuration}==""
ATTRS{devnum}=="29"
ATTRS{devpath}=="4"
ATTRS{idProduct}=="6011"
ATTRS{idVendor}=="0403"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="FTDI"
ATTRS{maxchild}=="0"
ATTRS{product}=="USB <-> Serial Cable"
ATTRS{quirks}=="0x0"
ATTRS{removable}=="removable"
ATTRS{serial}=="FT1RAIYI"
ATTRS{speed}=="480"
ATTRS{urbnum}=="23"
ATTRS{version}==" 2.00"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{authorized}=="1"
ATTRS{authorized_default}=="1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{bConfigurationValue}=="1"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{bMaxPower}=="0mA"
ATTRS{bNumConfigurations}=="1"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bcdDevice}=="0415"
ATTRS{bmAttributes}=="e0"
ATTRS{busnum}=="1"
ATTRS{configuration}==""
ATTRS{devnum}=="1"
ATTRS{devpath}=="0"
ATTRS{idProduct}=="0002"
ATTRS{idVendor}=="1d6b"
ATTRS{interface_authorized_default}=="1"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Linux 4.15.0-33-generic xhci-hcd"
ATTRS{maxchild}=="16"
ATTRS{product}=="xHCI Host Controller"
ATTRS{quirks}=="0x0"
ATTRS{removable}=="unknown"
ATTRS{serial}=="0000:00:14.0"
ATTRS{speed}=="480"
ATTRS{urbnum}=="1232"
ATTRS{version}==" 2.00"
looking at parent device '/devices/pci0000:00/0000:00:14.0':
KERNELS=="0000:00:14.0"
SUBSYSTEMS=="pci"
DRIVERS=="xhci_hcd"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x0c0330"
ATTRS{consistent_dma_mask_bits}=="64"
ATTRS{d3cold_allowed}=="1"
ATTRS{dbc}=="disabled"
ATTRS{device}=="0xa12f"
ATTRS{dma_mask_bits}=="64"
ATTRS{driver_override}=="(null)"
ATTRS{enable}=="1"
ATTRS{irq}=="122"
ATTRS{local_cpulist}=="0-7"
ATTRS{local_cpus}=="ff"
ATTRS{msi_bus}=="1"
ATTRS{numa_node}=="-1"
ATTRS{revision}=="0x31"
ATTRS{subsystem_device}=="0x06d9"
ATTRS{subsystem_vendor}=="0x1028"
ATTRS{vendor}=="0x8086"
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""
我终于通过"S"意识到属性的差异。所以我可以匹配一个更高的级别以及特定的低级别。因此 SUBSYSTEM 可以保留 tty 但随后搜索 ATTRS 而不是 ATTR。
所以我只需要将这一行添加到一个新文件中 /etc/udev/rules.d/95-custom.rules
:
SUBSYSTEM=="tty", ACTION=="add", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011", SYMLINK+="ttyGpsSerial"