From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, davem@davemloft.net,
lorenzo.bianconi@redhat.com, brouer@redhat.com,
echaudro@redhat.com, sameehj@amazon.com, kuba@kernel.org,
john.fastabend@gmail.com, daniel@iogearbox.net, ast@kernel.org,
shayagr@amazon.com
Subject: Re: [PATCH v2 net-next 6/9] bpf: helpers: add bpf_xdp_adjust_mb_header helper
Date: Fri, 4 Sep 2020 10:07:29 +0200 [thread overview]
Message-ID: <20200904080729.GE2884@lore-desk> (raw)
In-Reply-To: <20200904010924.m7h434gms27a3r77@ast-mbp.dhcp.thefacebook.com>
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On Sep 03, Alexei Starovoitov wrote:
> On Thu, Sep 03, 2020 at 10:58:50PM +0200, Lorenzo Bianconi wrote:
> > Introduce bpf_xdp_adjust_mb_header helper in order to adjust frame
> > headers moving *offset* bytes from/to the second buffer to/from the
> > first one.
> > This helper can be used to move headers when the hw DMA SG is not able
> > to copy all the headers in the first fragment and split header and data
> > pages.
> >
> > Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> > ---
> > include/uapi/linux/bpf.h | 25 ++++++++++++----
> > net/core/filter.c | 54 ++++++++++++++++++++++++++++++++++
> > tools/include/uapi/linux/bpf.h | 26 ++++++++++++----
> > 3 files changed, 95 insertions(+), 10 deletions(-)
> >
> > diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> > index 8dda13880957..c4a6d245619c 100644
> > --- a/include/uapi/linux/bpf.h
> > +++ b/include/uapi/linux/bpf.h
> > @@ -3571,11 +3571,25 @@ union bpf_attr {
> > * value.
> > *
> > * long bpf_copy_from_user(void *dst, u32 size, const void *user_ptr)
> > - * Description
> > - * Read *size* bytes from user space address *user_ptr* and store
> > - * the data in *dst*. This is a wrapper of copy_from_user().
> > - * Return
> > - * 0 on success, or a negative error in case of failure.
> > + * Description
> > + * Read *size* bytes from user space address *user_ptr* and store
> > + * the data in *dst*. This is a wrapper of copy_from_user().
> > + *
> > + * long bpf_xdp_adjust_mb_header(struct xdp_buff *xdp_md, int offset)
>
> botched rebase?
Yes, sorry. I will fix in v3.
Regards,
Lorenzo
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next prev parent reply other threads:[~2020-09-04 8:07 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 20:58 [PATCH v2 net-next 0/9] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 1/9] xdp: introduce mb in xdp_buff/xdp_frame Lorenzo Bianconi
2020-09-04 1:07 ` Alexei Starovoitov
2020-09-04 7:19 ` Jesper Dangaard Brouer
2020-09-04 15:15 ` David Ahern
2020-09-04 15:59 ` Jesper Dangaard Brouer
2020-09-04 16:30 ` David Ahern
2020-09-07 18:02 ` Jesper Dangaard Brouer
2020-09-08 1:22 ` David Ahern
2020-09-03 20:58 ` [PATCH v2 net-next 2/9] xdp: initialize xdp_buff mb bit to 0 in all XDP drivers Lorenzo Bianconi
2020-09-04 7:35 ` Jesper Dangaard Brouer
2020-09-04 7:54 ` Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 3/9] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer Lorenzo Bianconi
2020-09-06 7:33 ` Shay Agroskin
2020-09-06 9:05 ` Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 4/9] xdp: add multi-buff support to xdp_return_{buff/frame} Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 5/9] net: mvneta: add multi buffer support to XDP_TX Lorenzo Bianconi
2020-09-06 7:20 ` Shay Agroskin
2020-09-06 8:43 ` Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 6/9] bpf: helpers: add bpf_xdp_adjust_mb_header helper Lorenzo Bianconi
2020-09-04 1:09 ` Alexei Starovoitov
2020-09-04 8:07 ` Lorenzo Bianconi [this message]
2020-09-04 1:13 ` Alexei Starovoitov
2020-09-04 7:50 ` Lorenzo Bianconi
2020-09-04 13:52 ` Jesper Dangaard Brouer
2020-09-04 14:27 ` Lorenzo Bianconi
2020-09-04 6:47 ` John Fastabend
2020-09-04 9:45 ` Lorenzo Bianconi
2020-09-04 15:23 ` John Fastabend
2020-09-06 13:36 ` Lorenzo Bianconi
2020-09-08 19:57 ` John Fastabend
2020-09-08 21:31 ` Lorenzo Bianconi
2020-09-09 20:51 ` Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 7/9] bpf: helpers: add multibuffer support Lorenzo Bianconi
2020-09-03 21:24 ` Maciej Fijalkowski
2020-09-04 9:47 ` Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 8/9] samples/bpf: add bpf program that uses xdp mb helpers Lorenzo Bianconi
2020-09-03 20:58 ` [PATCH v2 net-next 9/9] net: mvneta: enable jumbo frames for XDP Lorenzo Bianconi
2020-09-04 1:08 ` [PATCH v2 net-next 0/9] mvneta: introduce XDP multi-buffer support Alexei Starovoitov
2020-09-04 7:40 ` Lorenzo Bianconi
2020-09-04 5:41 ` John Fastabend
2020-09-04 7:39 ` Lorenzo Bianconi
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