Re: Can we pass a file handle down to the block ioctls to implementper file filters on scsi SG_IO ?

[Paolo Bonzini]

Il 12/06/2012 20:52, Alan Cox ha scritto:
> > Sure; however, doing so requires access to some member of "struct file"
> > from SG_IO.  Thus, ioctl would need to take a "struct file" rather than
> > just an fmode_t.
> > 
> > The switch to fmode_t was done in 2007 by Al Viro.  I would like to
> > understand the reasons for the switch; it seems to me that it was part
> > of the big kernel lock removal.  If it's acceptable to undo it, I would
> > very much would like to add generic BPF filtering to SG_IO
> 
> That would solve all sorts of problems in this area, so lets ping the man
> himself -  Al ?

(Even if he says no, we could probably use cgroups instead).

Paolo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/