block request injection from user-space

[gl@xxxxxxxxx]

Hi all

I've searched for some time, but haven't found anything - is there a 
generic posibility to inject requests into (block) device's request queue 
from the user space? I know, there are some cdrom, scsi (sg_io?) ioctls, 
maybe others, but I haven't found any common methods independent from the 
device type. Ideally, it shouldn't even be an ioctl. Should work with scsi 
(all transports), [sp]ata, atapi, loopback, fd, sg, st (though character, 
still using block queues).

If there isn't such a thing, wouldn't it be desired? Maybe as a 
filesystem?

Thanks
Guennadi
---------------------------------
Guennadi Liakhovetski, Ph.D.
DSA Daten- und Systemtechnik GmbH
Pascalstr. 28
D-52076 Aachen
Germany

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