[openib-general] libibcm can't open /dev/infiniband/ucm0

[Bub Thomas]

Made some progress today:

The file OFED-1.0.1/SOURCES/openib-1.0.1/src/userspace/libibcm/README
talks about
	"mknod /dev/infiniband/ucm0 c 231 255"

This is not working for me. I'm getting the device /dev/infiniband/ucm0
created but the libibcm still could not open the device

Looked into the openIB kernel sources and found that the minor number
seems to be wrong in the README file. With a minor number "224" and the
creation like:

	"mknod /dev/infiniband/ucm0 c 231 224"

I got the device created andtthe libibcm could open the device.

So I assume this to be a bug at least in the README file. I'm not the
kernel expert to tell where else this has to be changed.

Should I open a bug on this?

I got a first SLES10 system eaelier this week, there I'm using the
ofed-1.0-sles10-rpms_x86_64.tar.gz instead of the OFED-1.0.1.tgz.
Interesting enough the /dev/infiniband/ucm0 got created and usable
automatically.

Thomas
 
-----Original Message-----
From: Sean Hefty [mailto:sean.hefty at intel.com] 
Sent: Tuesday, August 22, 2006 5:47 PM
To: Bub Thomas; Sean Hefty
Cc: openib-general at openib.org
Subject: RE: [openib-general] libibcm can't open /dev/infiniband/ucm0

>https://openib.org/tiki/tiki-index.php?page=Install+OpenIB+for+Chelsio+
T
>3&highlight=udev

The udev information for this link looks correct.

>Or is there another way/description?

You can run mknod to manually create the file.  (See the README file in
the
libibcm directory.)

>Additionally I didn't find the udev rules for the already exsisting
>/dev/infinibadn devices in the /etc/udev/udev.rules file.

Is there any chance these were created manually at some point?  What
files are
in the directory?  (I would expect something like issm*, umad*, ucm*,
uverbs*.)

- Sean