PERFORCE change 83251 for review

[Scott Long]

Nate Lawson wrote:
> Scott Long wrote:
> 
>> http://perforce.freebsd.org/chv.cgi?CH=83251
>>
>> Change 83251 by scottl at scottl-junior on 2005/09/08 07:37:47
>>
>>     Import Danny Braniss' iSCSI initiator stack.
>>
>> Affected files ...
>>
>> .. //depot/projects/iscsi/blurb#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/isc_cam.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/isc_sm.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/isc_soc.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/isc_subr.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/iscsi.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/iscsi.h#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/iscsi_subr.c#1 add
>> .. //depot/projects/iscsi/src/sys/dev/iscsi/iscsivar.h#1 add
>> .. //depot/projects/iscsi/src/sys/modules/iscsi_initiator/Makefile#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/Makefile#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/auth.c#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/config.c#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/config.sample#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/fsm.c#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/iscontrol.c#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/iscontrol.h#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/pdu.c#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/pdu.h#1 add
>> .. //depot/projects/iscsi/src/usr.sbin/iscontrol/textkey.h#1 add
>> .. //depot/projects/scottl-camlock/src/sys/cam/cam_xpt.c#17 edit
>>
>> Differences ...
>>
>> ==== //depot/projects/scottl-camlock/src/sys/cam/cam_xpt.c#17 
>> (text+ko) ====
>>
>> @@ -1527,7 +1527,7 @@
>>          s = splsoftcam();
>>          camq_resize(&device->drvq, device->drvq.array_size - 1);
>>  
>> -        device->generation++;
>> +        atomic_add_int(&device->generation, 1);
>>  
>>          SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
>>  
> 
> 
> And a locking change.  :)
> 
> Nice about iSCSI.  Will having iscontrol in usr.sbin prevent mounting 
> /usr as an iSCSI partition?  How hard is it to do iSCSI root mounts?
> 

The current incarnation of this code requires iscontrol to do discovery
and initial connection.  Without it, you don't even get a /dev device.
So it's really only suitable for secondary storge.  At some point we'll
probably look at putting discovery into the kernel.

Scott