On Tue, 14 Jun 2011, Michal Nazarewicz wrote:
It's not that g_mass_storage was written from scratch. Most of the code
was taken from g_file_storage. I always thought about it as adding a
tiny layer to what Alan has written. I also always felt that
g_mass_storage âis mineâ not because I wrote it but because I
introduced bugs to Alan's code, so I need to take care of those. ;)
On Tue, 14 Jun 2011 16:05:18 +0200, Alan Stern wrote:
That's right; this isn't a matter of ownership. However there are some
technical differences too. IIRC:
g_mass_storage is more permissive about some of the module
parameters. It allows "removable" and "cdrom" attributes to
be specified independently for different LUNs, whereas
g_file_storage uses a single value of each for all LUNs.
Those are minor differences though. Minor in the sense that anything
that one was able to pass to g_file_storage can be passed to
g_mass_storage with potentially changed syntax.
g_file_storage allows the user to specify the transport and
protocol values, whereas g_mass_storage doesn't. This is
not very useful in production (everybody uses Bulk-Only and
Transparent SCSI these days), but it might be useful for
testing (or for emulating a USB floppy drive).
Ah, right, I have completely forgotten about those. That could be
a reason to stick to both or implement it in g_mass_storage. I
don't feel competent commenting on the usefulness of the other
modes.
In addition there's the user problem. If we eliminate one driver or
the other, it forces some people to change their runtime environment.
Of course, the kernel has done this sort of thing in the past. But at
least there ought to be an initial period during which one driver is
deprecated, before it is removed completely.
Agreed. That's what I meant saying to âphase outâ.
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Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michal "mina86" Nazarewicz (o o)
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