Re: USB/VMWare question

[Lindsay Haisley <fmouse-gentoo@fmp.com>]

Thus spake Richard Troth on Tue, Nov 16, 2004 at 10:43:24AM CST
> I get similar pain with SuSE 9.1 (2.6.4 kernel).
> If you happen to hear of a fix,  and it doesn't get posted,
> please let me know!

Here's my fix.  I'll post it to the hotplug-devel list, too.

I make no recommendation that this patch be included in, or even considered
for future hotplug releases.  It's a specific fix for a specific problem
involving a piece of commercial software (VMware).  Because the developoment
of hotplug and udev is very active, and it looks as if hotplug functionality
may be folded into udev at some point, this fix may have a rather limited
lifespan, however the principle will probably be applicable as long as
module loading is implemented in user space.

This fix is specifically for VMware Workstation.  Other solutions may be
available for VMware server products which come with API tools for
communication between guest and host OSes.  It relies on the simple fact
that the vmmon kernel module is only in use when an instance of VMware
Workstation is running, and lsmod shows a usage count greater than 0. The
patch causes the load_modules function to grep the file
/etc/hotplug/vmblacklist (you have to create this) and if a module listed
therein is requested as the result of a hotplug event, it examines the usage
count on the loaded vmmon module. If no vmmon module is loaded, or if it's
usage count is 0, then the vmblacklisted module is loaded. If the vmmon
module exists and has a usage count greater than 0 then the blacklisted
module is not loaded. This is a patch against
/etc/hotplug/hotplug.functions.

Be sure to use dashes instead of underscores on module names in vmblacklist,
e.g. "usb-storage". The hotplug script expects them.

--- hotplug.functions.orig	2004-11-18 16:55:32.423375746 -0600
+++ hotplug.functions	2004-11-18 17:41:06.757171240 -0600
@@ -134,6 +134,11 @@
 		debug_mesg "... blacklisted module:  $MODULE"
 		continue
 	    fi
+	    if grep -q "^$(echo $MODULE|sed -e 's/[-_]/[-_]/g')\$" $HOTPLUG_DIR/vmblacklist; then
+		if [ "$(lsmod|grep vmmon|awk -F" " '{print $1}')" = "vmmon" -a $(lsmod|grep vmmon|awk -F" " '{print $3}') != "0" ];then
+   		   continue
+		fi
+	    fi
 
 	    # statically linked modules aren't shown by 'lsmod',
 	    # and user mode drivers will ONLY have a setup script;


-- 
Lindsay Haisley       | "Fighting against human |     PGP public key
FMP Computer Services |    creativity is like   |      available at
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http://www.fmp.com    |        dandelions"      |
                      |      (Pamela Jones)     |


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