Christoph Hellwig wrote: > On Fri, Nov 10, 2006 at 12:08:15PM -0800, Luben Tuikov wrote: >> P.S. I'd love to see SG_DXFER_TO_FROM_DEV completely ripped out >> of sg.c, for obvious reasons. Can you not duplicate the resid "fix" >> it provides into "FROM_DEV" -- do apps really rely on it? > > At the beginning of this thread it was mentioned cdparanio uses it. > But in general we can't just rip out userland interfaces, we pretend > to have a stable userspace abi (and except for the big sysfs mess that > actually comes very close to the truth). > > What we should do is to document very well what SG_DXFER_TO_FROM_DEV > is doing and that odd name that's been chosen for it. I'll prepare > a patch for that. Christoph, It is documented and has been from day one. See scsi/sg.h and http://sg.torque.net/sg/p/sg_v3_ho.html Naming it is a challenge and at the time there were no bidirectional transfers to/from a device to worry about. A more appropriate but impractical name might be: SG_DXFER_TO_KERNEL_BUFFER_THEN_READ_FROM_DEV_VIA_KERNEL_BUFFER Doug Gilbert - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
