Messages in this thread | | | Date | Tue, 12 Jun 2012 21:13:54 +0200 | From | Paolo Bonzini <> | Subject | Re: Can we pass a file handle down to the block ioctls to implement per file filters on scsi SG_IO ? |
| |
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
| |