Re: Static naming for hiddev nodes

[Kay Sievers <kay.sievers@vrfy.org>]

On Thu, 2007-08-02 at 21:11 -0400, Adam Kropelin wrote:
> Kay Sievers wrote:
> > On 8/3/07, Adam Kropelin <akropel1@rochester.rr.com> wrote:
> >> Kay Sievers wrote:
> >>> On 8/3/07, Adam Kropelin <akropel1@rochester.rr.com> wrote:
> >>>> I'm attempting to establish static naming for some hiddev devices
> >>>> (UPSes) based on serial numbers. I used to be able to do this
> >>>> fairly easily many moons ago in the early days of udev. Revisiting
> >>>> it on a modern distro (RHEL5) I am unable to make it work. Here
> >>>> are the udev rules I've tried and what happened with each....
> >>>>
> >>>>     DRIVER="hiddev", SYSFS{serial}="JB0319039999", NAME="ups1"
> >>>>     - Does not match
> >>>>
> >>>>     DRIVER="usbhid", SYSFS{serial}="JB0319039999", NAME="ups1"
> >>>>     - Does not match
> >>>>
> >>>>     SYSFS{serial}="JB0319039999", NAME="ups1"
> >>>>     - Matches, but results in a device node for the usbdev not for
> >>>> the hiddev
> >>>>
> >>>>     BUS="usb", SYSFS{serial}="JB0319039999", NAME="ups1"
> >>>>     - Matches, but results in a device node for the usbdev not for
> >>>> the hiddev
> >>>>
> >>>>     SUBSYSTEM="usb", SYSFS{serial}="JB0319039999", NAME="ups1"
> >>>>     - Does not match
> >>>>
> >>>> I admit to being almost completely lost in the sysfs hierarchy. I'd
> >>>> be happy to post a subtree if someone can suggest which one would
> >>>> be helpful. It is worth noting that the default rules create
> >>>> correct and working hiddev* nodes...I'm just trying to given them
> >>>> persistent names.
> >>>
> >>> What is the "original" device node name, you expect and want to
> >>> rename?
> >>
> >> hiddev0
> >>
> >>> What does:
> >>>  udevmonitor --env --kernel
> >>> print when you connect the device?
> >>
> >> My udevmonitor does not appear to support the --kernel option, but
> >> here is output from --env:
> >
> >> UDEV  [1186101575.338918] add@/class/usb/hiddev0
> >> UDEV_LOG=3
> >> ACTION­d
> >> DEVPATH=/class/usb/hiddev0
> >> SUBSYSTEM=usb
> >> SEQNUM(33
> >> PHYSDEVPATH=/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.3/1-2.3:1.0
> >> PHYSDEVBUS=usb
> >> PHYSDEVDRIVER=usbhid
> >> MAJOR\x180
> >> MINOR–
> >> UDEVD_EVENT=1
> >> DEVNAME=/dev/hiddev0
> >
> > What does:
> >  udevinfo -a -p /class/usb/hiddev0
> > print?
> 
> [adk0212@mail etc]$ udevinfo -a -p /class/usb/hiddev0
> 
> Udevinfo starts with the device specified by the devpath and then
> walks up the chain of parent devices. It prints for every device
> found, all possible attributes in the udev rules key format.
> A rule to match, can be composed by the attributes of the device
> and the attributes from one single parent device.
> 
>   looking at device '/class/usb/hiddev0':
>     KERNEL="hiddev0"
>     SUBSYSTEM="usb"
>     SYSFS{dev}="180:96"
> 
>   looking at parent device 
> '/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.3/1-2.3:1.0':
>     ID="1-2.3:1.0"
>     BUS="usb"
>     DRIVER="usbhid"
>     SYSFS{modalias}="usb:v051Dp0002d0106dc00dsc00dp00ic03isc00ip00"
>     SYSFS{bInterfaceProtocol}="00"
>     SYSFS{bInterfaceSubClass}="00"
>     SYSFS{bInterfaceClass}="03"
>     SYSFS{bNumEndpoints}="01"
>     SYSFS{bAlternateSetting}=" 0"
>     SYSFS{bInterfaceNumber}="00"
> 
>   looking at parent device 
> '/devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.3':
>     ID="1-2.3"
>     BUS="usb"
>     DRIVER="usb"
>     SYSFS{configuration}=""
>     SYSFS{serial}="BB0100009999  "
> 
> [I swapped UPSes at one point tonight, which is why this serial doesn't 
> match the udev rules I quoted earlier. I had the serial number right at 
> the time I did the test.]

Does:
  KERNEL="hiddev*", SYSFS{serial}="BB0100009999", NAME="ups"
work?

Kay


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