Re: [PATCH 0/3] SG_IO command filtering via sysfs

[Paolo Bonzini]

On 16/11/18 01:37, Bart Van Assche wrote:
> All user space interfaces in the Linux kernel for storage that I'm familiar
> with not only allow configuration of parameters but also make it easy to
> query which parameters have been configured. The existing sysfs and configfs
> interfaces demonstrate this. Using BPF to configure SG/IO access has a
> significant disadvantage, namely that it is very hard to figure out what has
> been configured. Figuring out what has been configured namely requires
> disassembling BPF. I'm not sure anyone will be enthusiast about this.

Well, that's a problem with BPF in general.  With great power comes
great obscurability.

Paolo