Re: How to determine link of umass/da devices
On Wed, Oct 19, 2005 at 09:38:08AM -0600, M. Warner Losh wrote: In message: [EMAIL PROTECTED] Tom Alsberg [EMAIL PROTECTED] writes: : With tools like usbdevs and sysctl, I can find out what USB devices : are connected, and also what USB drivers handle them (so I can see, : for example, that there is a SanDisk Cruzer Micro connected to port 2 : in bus 3 and the umass driver under it). You can find this out best via the devinfo interface. : I can also find out what da devices there are using camcontrol. Right. cam doesn't hook the da devices into the device tree. : However, how can I find out which da device was assigned to which : umass/usb device? Generally, you can't. There's not really an interface to get this information. devinfo assumes that things like disk drives would be in the device tree and except for cam, all other drivers conform to this world view. There's some efforts to update and lock cam which I think will rectify this. Not absolutely technicaly correct, but currently one can savely assume that the umass-sim number from camcontrol devlist -v is identic with the umass number from devinfo. This assumption likely won't hold forever. -- B.Walter BWCThttp://www.bwct.de [EMAIL PROTECTED] [EMAIL PROTECTED] ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: How to determine link of umass/da devices
In message: [EMAIL PROTECTED] Tom Alsberg [EMAIL PROTECTED] writes: : With tools like usbdevs and sysctl, I can find out what USB devices : are connected, and also what USB drivers handle them (so I can see, : for example, that there is a SanDisk Cruzer Micro connected to port 2 : in bus 3 and the umass driver under it). You can find this out best via the devinfo interface. : I can also find out what da devices there are using camcontrol. Right. cam doesn't hook the da devices into the device tree. : However, how can I find out which da device was assigned to which : umass/usb device? Generally, you can't. There's not really an interface to get this information. devinfo assumes that things like disk drives would be in the device tree and except for cam, all other drivers conform to this world view. There's some efforts to update and lock cam which I think will rectify this. : I see this info in some inconvenient form in : dmesg. But I need something easier to handle programmatically to : write a program that uses that data. I prefer not to resort to some : ugly hack like trying to parse dmesg. Especially since dmesg can disapper quickly on some systems. : Also, I'd be interested if it were possible to have my program : informed when devices are connected/disconnected. Can a process ask : usbd to send it some signal and somehow provide the details of the : event when a device is connected/disconnected? devd provides a pipe of all events from the kernel in /var/run/devd.pipe. Warner ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
How to determine link of umass/da devices
Hi. I need to write some user interface to perform some tasks with USB storage devices. One of the tasks is to show a list of all USB storage connected and all slices/partitions and filesystems in them. With tools like usbdevs and sysctl, I can find out what USB devices are connected, and also what USB drivers handle them (so I can see, for example, that there is a SanDisk Cruzer Micro connected to port 2 in bus 3 and the umass driver under it). I can also find out what da devices there are using camcontrol. However, how can I find out which da device was assigned to which umass/usb device? I see this info in some inconvenient form in dmesg. But I need something easier to handle programmatically to write a program that uses that data. I prefer not to resort to some ugly hack like trying to parse dmesg. Also, I'd be interested if it were possible to have my program informed when devices are connected/disconnected. Can a process ask usbd to send it some signal and somehow provide the details of the event when a device is connected/disconnected? Thanks, -- Tom -- Tom Alsberg - certified insane, complete illiterate. Homepage: http://www.cs.huji.ac.il/~alsbergt/ * An idea is not responsible for the people who believe in it. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
