From: Hangbin Liu <liuhangbin@gmail.com>
To: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Jesper Dangaard Brouer" <brouer@redhat.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Toke Høiland-Jørgensen" <toke@redhat.com>
Subject: Re: [PATCHv6 bpf-next] samples/bpf: add xdp program on egress for xdp_redirect_map
Date: Fri, 15 Jan 2021 12:17:51 +0800 [thread overview]
Message-ID: <20210115041751.GD1421720@Leo-laptop-t470s> (raw)
In-Reply-To: <4d9b5846-bd08-09b4-53a2-3cb02a9a1eee@fb.com>
Hi Yonghong,
On Thu, Jan 14, 2021 at 01:01:28PM -0800, Yonghong Song wrote:
> > +/* map to stroe egress interface mac address */
>
> s/stroe/store
Thanks, I will fix it.
> > - struct bpf_program *prog, *dummy_prog;
> > + struct bpf_program *prog, *dummy_prog, *devmap_prog;
> > + int devmap_prog_fd_0 = -1, devmap_prog_fd_1 = -1;
>
> The default value is -1 here. I remembered there was a discussion
> about the default value here, does default value 0 work here?
I didn't saw the discussion. But 0 should works as in __dev_map_alloc_node
it only gets the prog when fd > 0.
static struct bpf_dtab_netdev *__dev_map_alloc_node(struct net *net,
struct bpf_dtab *dtab,
struct bpf_devmap_val *val,
unsigned int idx)
{
...
if (val->bpf_prog.fd > 0) {
prog = bpf_prog_get_type_dev(val->bpf_prog.fd,
BPF_PROG_TYPE_XDP, false);
if (IS_ERR(prog))
goto err_put_dev;
if (prog->expected_attach_type != BPF_XDP_DEVMAP)
goto err_put_prog;
}
...
}
> > + if (xdp_flags & XDP_FLAGS_SKB_MODE) {
> > + prog = bpf_object__find_program_by_title(obj, "xdp_redirect_general");
>
> libbpf supports each section having multiple programs, so
> bpf_object__find_program_by_title() is not recommended.
> Could you change to bpf_object__find_program_by_name()?
Thanks for this reminder, I will fix it.
Thanks
Hangbin
next prev parent reply other threads:[~2021-01-15 4:18 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 12:46 [PATCH bpf-next] samples/bpf: add xdp_redirect_map with xdp_prog support Hangbin Liu
2020-11-10 14:25 ` Jesper Dangaard Brouer
2020-11-10 15:24 ` Maciej Fijalkowski
2020-11-11 1:12 ` Hangbin Liu
2020-11-26 8:43 ` [PATCHv2 bpf-next] samples/bpf: add xdp program on egress for xdp_redirect_map Hangbin Liu
2020-11-26 10:51 ` Jesper Dangaard Brouer
2020-11-26 14:19 ` Hangbin Liu
2020-11-27 6:31 ` Yonghong Song
2020-11-30 7:51 ` Hangbin Liu
2020-11-30 9:32 ` Jesper Dangaard Brouer
2020-11-30 13:10 ` Hangbin Liu
2020-11-30 15:12 ` Jesper Dangaard Brouer
2020-11-30 16:07 ` Toke Høiland-Jørgensen
2020-12-08 8:18 ` [PATCHv3 " Hangbin Liu
2020-12-08 10:39 ` Jesper Dangaard Brouer
2020-12-08 11:11 ` Hangbin Liu
2020-12-08 12:01 ` [PATCHv4 " Hangbin Liu
2020-12-11 0:15 ` Daniel Borkmann
2020-12-11 2:40 ` [PATCHv5 " Hangbin Liu
2021-01-14 14:27 ` [PATCHv6 " Hangbin Liu
2021-01-14 21:01 ` Yonghong Song
2021-01-15 4:17 ` Hangbin Liu [this message]
2021-01-15 6:24 ` [PATCHv7 " Hangbin Liu
2021-01-15 16:57 ` Yonghong Song
2021-01-18 22:46 ` Daniel Borkmann
2021-01-19 3:12 ` [PATCHv8 " Hangbin Liu
2021-01-19 14:51 ` Jesper Dangaard Brouer
2021-01-20 4:16 ` Hangbin Liu
2021-01-21 13:06 ` [PATCHv9 " Hangbin Liu
2021-01-21 15:05 ` Jesper Dangaard Brouer
2021-01-22 2:50 ` [PATCHv10 " Hangbin Liu
2021-01-22 10:32 ` Jesper Dangaard Brouer
2021-01-22 23:30 ` patchwork-bot+netdevbpf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210115041751.GD1421720@Leo-laptop-t470s \
--to=liuhangbin@gmail.com \
--cc=bpf@vger.kernel.org \
--cc=brouer@redhat.com \
--cc=daniel@iogearbox.net \
--cc=john.fastabend@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=toke@redhat.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).