From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, davem@davemloft.net,
ast@kernel.org, daniel@iogearbox.net, toke@redhat.com,
lorenzo.bianconi@redhat.com, dsahern@kernel.org
Subject: Re: [PATCH v2 bpf-next 3/8] cpumap: formalize map value as a named struct
Date: Mon, 22 Jun 2020 13:50:07 +0200 [thread overview]
Message-ID: <20200622115007.GB14425@localhost.localdomain> (raw)
In-Reply-To: <20200622113313.6f56244d@carbon>
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> On Sat, 20 Jun 2020 00:57:19 +0200
> Lorenzo Bianconi <lorenzo@kernel.org> wrote:
>
> > As it has been already done for devmap, introduce 'struct bpf_cpumap_val'
> > to formalize the expected values that can be passed in for a CPUMAP.
> > Update cpumap code to use the struct.
> >
> > Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> > ---
> > include/uapi/linux/bpf.h | 9 +++++++++
> > kernel/bpf/cpumap.c | 25 +++++++++++++------------
> > tools/include/uapi/linux/bpf.h | 9 +++++++++
> > 3 files changed, 31 insertions(+), 12 deletions(-)
> >
> > diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> > index 19684813faae..a45d61bc886e 100644
> > --- a/include/uapi/linux/bpf.h
> > +++ b/include/uapi/linux/bpf.h
> > @@ -3774,6 +3774,15 @@ struct bpf_devmap_val {
> > } bpf_prog;
> > };
> >
> > +/* CPUMAP map-value layout
> > + *
> > + * The struct data-layout of map-value is a configuration interface.
> > + * New members can only be added to the end of this structure.
> > + */
> > +struct bpf_cpumap_val {
> > + __u32 qsize; /* queue size */
> > +};
> > +
>
> Nitpicking the comment: /* queue size */
> It doesn't provide much information to the end-user.
>
> What about changing it to: /* queue size to remote target CPU */
Yes, I agree. I will fix it in v3.
Regards,
Lorenzo
> ?
>
> --
> Best regards,
> Jesper Dangaard Brouer
> MSc.CS, Principal Kernel Engineer at Red Hat
> LinkedIn: http://www.linkedin.com/in/brouer
>
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next prev parent reply other threads:[~2020-06-22 11:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 22:57 [PATCH v2 bpf-next 0/8] introduce support for XDP programs in CPUMAP Lorenzo Bianconi
2020-06-19 22:57 ` [PATCH v2 bpf-next 1/8] net: Refactor xdp_convert_buff_to_frame Lorenzo Bianconi
2020-06-21 15:15 ` Jesper Dangaard Brouer
2020-06-22 11:48 ` Lorenzo Bianconi
2020-06-19 22:57 ` [PATCH v2 bpf-next 2/8] samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option loop Lorenzo Bianconi
2020-06-21 15:26 ` Jesper Dangaard Brouer
2020-06-19 22:57 ` [PATCH v2 bpf-next 3/8] cpumap: formalize map value as a named struct Lorenzo Bianconi
2020-06-22 9:33 ` Jesper Dangaard Brouer
2020-06-22 11:50 ` Lorenzo Bianconi [this message]
2020-06-19 22:57 ` [PATCH v2 bpf-next 4/8] bpf: cpumap: add the possibility to attach an eBPF program to cpumap Lorenzo Bianconi
2020-06-22 9:48 ` Jesper Dangaard Brouer
2020-06-23 14:56 ` Jesper Dangaard Brouer
2020-06-23 15:23 ` Jesper Dangaard Brouer
2020-06-19 22:57 ` [PATCH v2 bpf-next 5/8] bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map entries Lorenzo Bianconi
2020-06-19 22:57 ` [PATCH v2 bpf-next 6/8] libbpf: add SEC name for xdp programs attached to CPUMAP Lorenzo Bianconi
2020-06-23 5:50 ` Andrii Nakryiko
2020-06-19 22:57 ` [PATCH v2 bpf-next 7/8] samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap Lorenzo Bianconi
2020-06-19 22:57 ` [PATCH v2 bpf-next 8/8] selftest: add tests for XDP programs in CPUMAP entries Lorenzo Bianconi
2020-06-23 5:55 ` Andrii Nakryiko
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