From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: netdev@vger.kernel.org, lorenzo.bianconi@redhat.com,
davem@davemloft.net, thomas.petazzoni@bootlin.com,
brouer@redhat.com, ilias.apalodimas@linaro.org,
matteo.croce@redhat.com, mw@semihalf.com
Subject: Re: [PATCH v4 net-next 4/7] net: mvneta: add basic XDP support
Date: Wed, 16 Oct 2019 18:26:50 -0700 [thread overview]
Message-ID: <20191016182650.2989ddf4@cakuba.netronome.com> (raw)
In-Reply-To: <30b6fad4fe5411e092171bb825f7a6ce0041d63e.1571258793.git.lorenzo@kernel.org>
On Wed, 16 Oct 2019 23:03:09 +0200, Lorenzo Bianconi wrote:
> Add basic XDP support to mvneta driver for devices that rely on software
> buffer management. Currently supported verdicts are:
> - XDP_DROP
> - XDP_PASS
> - XDP_REDIRECT
> - XDP_ABORTED
>
> - iptables drop:
> $iptables -t raw -I PREROUTING -p udp --dport 9 -j DROP
> $nstat -n && sleep 1 && nstat
> IpInReceives 151169 0.0
> IpExtInOctets 6953544 0.0
> IpExtInNoECTPkts 151165 0.0
>
> - XDP_DROP via xdp1
> $./samples/bpf/xdp1 3
> proto 0: 421419 pkt/s
> proto 0: 421444 pkt/s
> proto 0: 421393 pkt/s
> proto 0: 421440 pkt/s
> proto 0: 421184 pkt/s
>
> Tested-by: Matteo Croce <mcroce@redhat.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> +static int mvneta_xdp_setup(struct net_device *dev, struct bpf_prog *prog,
> + struct netlink_ext_ack *extack)
> +{
> + struct mvneta_port *pp = netdev_priv(dev);
> + struct bpf_prog *old_prog;
> +
> + if (prog && dev->mtu > MVNETA_MAX_RX_BUF_SIZE) {
> + NL_SET_ERR_MSG_MOD(extack, "Jumbo frames not supported on XDP");
> + return -EOPNOTSUPP;
> + }
> +
> + if (netif_running(dev))
> + mvneta_stop(dev);
Actually if pp->prog && prog you don't have to stop/start, right?
You just gotta restart if !!pp->prog != !!prog?
> + old_prog = xchg(&pp->xdp_prog, prog);
> + if (old_prog)
> + bpf_prog_put(old_prog);
> +
> + if (netif_running(dev))
> + return mvneta_open(dev);
> +
> + return 0;
> +}
next prev parent reply other threads:[~2019-10-17 1:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-16 21:03 [PATCH v4 net-next 0/7] add XDP support to mvneta driver Lorenzo Bianconi
2019-10-16 21:03 ` [PATCH v4 net-next 1/7] net: mvneta: introduce mvneta_update_stats routine Lorenzo Bianconi
2019-10-17 1:01 ` Jakub Kicinski
2019-10-16 21:03 ` [PATCH v4 net-next 2/7] net: mvneta: introduce page pool API for sw buffer manager Lorenzo Bianconi
2019-10-17 1:14 ` Jakub Kicinski
2019-10-17 9:58 ` Lorenzo Bianconi
2019-10-16 21:03 ` [PATCH v4 net-next 3/7] net: mvneta: rely on build_skb in mvneta_rx_swbm poll routine Lorenzo Bianconi
2019-10-17 1:19 ` Jakub Kicinski
2019-10-16 21:03 ` [PATCH v4 net-next 4/7] net: mvneta: add basic XDP support Lorenzo Bianconi
2019-10-17 1:26 ` Jakub Kicinski [this message]
2019-10-17 9:46 ` Lorenzo Bianconi
2019-10-16 21:03 ` [PATCH v4 net-next 5/7] net: mvneta: move header prefetch in mvneta_swbm_rx_frame Lorenzo Bianconi
2019-10-16 21:03 ` [PATCH v4 net-next 6/7] net: mvneta: make tx buffer array agnostic Lorenzo Bianconi
2019-10-16 21:03 ` [PATCH v4 net-next 7/7] net: mvneta: add XDP_TX support Lorenzo Bianconi
2019-10-17 1:28 ` Jakub Kicinski
2019-10-17 9:44 ` Lorenzo Bianconi
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