From: David Ahern <dsahern@kernel.org>
To: netdev@vger.kernel.org
Cc: prashantbhole.linux@gmail.com, jasowang@redhat.com,
davem@davemloft.net, jakub.kicinski@netronome.com,
jbrouer@redhat.com, toke@redhat.com, mst@redhat.com,
toshiaki.makita1@gmail.com, daniel@iogearbox.net,
john.fastabend@gmail.com, ast@kernel.org, kafai@fb.com,
songliubraving@fb.com, yhs@fb.com, andriin@fb.com,
dsahern@gmail.com, David Ahern <dahern@digitalocean.com>
Subject: [PATCH bpf-next 09/12] tun: set egress XDP program
Date: Wed, 22 Jan 2020 18:42:07 -0700 [thread overview]
Message-ID: <20200123014210.38412-10-dsahern@kernel.org> (raw)
In-Reply-To: <20200123014210.38412-1-dsahern@kernel.org>
From: David Ahern <dahern@digitalocean.com>
This patch adds a way to set tx path XDP program in tun driver
by handling XDP_SETUP_PROG_EGRESS and XDP_QUERY_PROG_EGRESS in
ndo_bpf handler.
Signed-off-by: David Ahern <dahern@digitalocean.com>
Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail.com>
---
drivers/net/tun.c | 34 ++++++++++++++++++++++++++--------
1 file changed, 26 insertions(+), 8 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d4a0e59fcf5c..b6bac773f2a0 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -238,6 +238,7 @@ struct tun_struct {
u32 rx_batched;
struct tun_pcpu_stats __percpu *pcpu_stats;
struct bpf_prog __rcu *xdp_prog;
+ struct bpf_prog __rcu *xdp_egress_prog;
struct tun_prog __rcu *steering_prog;
struct tun_prog __rcu *filter_prog;
struct ethtool_link_ksettings link_ksettings;
@@ -1156,15 +1157,21 @@ tun_net_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
}
static int tun_xdp_set(struct net_device *dev, struct bpf_prog *prog,
- struct netlink_ext_ack *extack)
+ bool egress, struct netlink_ext_ack *extack)
{
struct tun_struct *tun = netdev_priv(dev);
struct tun_file *tfile;
struct bpf_prog *old_prog;
int i;
- old_prog = rtnl_dereference(tun->xdp_prog);
- rcu_assign_pointer(tun->xdp_prog, prog);
+ if (egress) {
+ old_prog = rtnl_dereference(tun->xdp_egress_prog);
+ rcu_assign_pointer(tun->xdp_egress_prog, prog);
+ } else {
+ old_prog = rtnl_dereference(tun->xdp_prog);
+ rcu_assign_pointer(tun->xdp_prog, prog);
+ }
+
if (old_prog)
bpf_prog_put(old_prog);
@@ -1185,12 +1192,16 @@ static int tun_xdp_set(struct net_device *dev, struct bpf_prog *prog,
return 0;
}
-static u32 tun_xdp_query(struct net_device *dev)
+static u32 tun_xdp_query(struct net_device *dev, bool egress)
{
struct tun_struct *tun = netdev_priv(dev);
const struct bpf_prog *xdp_prog;
- xdp_prog = rtnl_dereference(tun->xdp_prog);
+ if (egress)
+ xdp_prog = rtnl_dereference(tun->xdp_egress_prog);
+ else
+ xdp_prog = rtnl_dereference(tun->xdp_prog);
+
if (xdp_prog)
return xdp_prog->aux->id;
@@ -1201,13 +1212,20 @@ static int tun_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
switch (xdp->command) {
case XDP_SETUP_PROG:
- return tun_xdp_set(dev, xdp->prog, xdp->extack);
+ return tun_xdp_set(dev, xdp->prog, false, xdp->extack);
+ case XDP_SETUP_PROG_EGRESS:
+ return tun_xdp_set(dev, xdp->prog, true, xdp->extack);
case XDP_QUERY_PROG:
- xdp->prog_id = tun_xdp_query(dev);
- return 0;
+ xdp->prog_id = tun_xdp_query(dev, false);
+ break;
+ case XDP_QUERY_PROG_EGRESS:
+ xdp->prog_id = tun_xdp_query(dev, true);
+ break;
default:
return -EINVAL;
}
+
+ return 0;
}
static int tun_net_change_carrier(struct net_device *dev, bool new_carrier)
--
2.21.1 (Apple Git-122.3)
next prev parent reply other threads:[~2020-01-23 1:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 1:41 [PATCH bpf-next 00/12] Add support for XDP in egress path David Ahern
2020-01-23 1:41 ` [PATCH bpf-next 01/12] net: Add new XDP setup and query commands David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 02/12] net: Add BPF_XDP_EGRESS as a bpf_attach_type David Ahern
2020-01-23 11:34 ` Toke Høiland-Jørgensen
2020-01-23 21:32 ` David Ahern
2020-01-24 9:49 ` Toke Høiland-Jørgensen
2020-01-24 7:33 ` Martin Lau
2020-01-23 1:42 ` [PATCH bpf-next 03/12] net: Add IFLA_XDP_EGRESS for XDP programs in the egress path David Ahern
2020-01-23 11:35 ` Toke Høiland-Jørgensen
2020-01-23 21:33 ` David Ahern
2020-01-24 15:21 ` Jakub Kicinski
2020-01-24 15:36 ` Toke Høiland-Jørgensen
2020-01-26 1:43 ` David Ahern
2020-01-26 4:54 ` Alexei Starovoitov
2020-02-02 17:59 ` David Ahern
2020-01-26 12:49 ` Jesper Dangaard Brouer
2020-01-26 16:38 ` David Ahern
2020-01-26 22:17 ` Jakub Kicinski
2020-01-28 14:13 ` Jesper Dangaard Brouer
2020-01-30 14:45 ` Jakub Kicinski
2020-02-01 16:03 ` Toke Høiland-Jørgensen
2020-02-02 17:48 ` David Ahern
2020-01-26 22:11 ` Jakub Kicinski
2020-01-27 4:03 ` David Ahern
2020-01-27 14:16 ` Jakub Kicinski
2020-01-28 3:43 ` David Ahern
2020-01-28 13:57 ` Jakub Kicinski
2020-02-01 16:24 ` Toke Høiland-Jørgensen
2020-02-01 17:08 ` Jakub Kicinski
2020-02-01 20:05 ` Toke Høiland-Jørgensen
2020-02-02 4:15 ` Jakub Kicinski
2020-02-03 19:56 ` Toke Høiland-Jørgensen
2020-02-03 20:13 ` Toke Høiland-Jørgensen
2020-02-03 22:15 ` Jesper Dangaard Brouer
2020-02-04 11:00 ` Toke Høiland-Jørgensen
2020-02-04 17:09 ` Jakub Kicinski
2020-02-05 15:30 ` Toke Høiland-Jørgensen
2020-02-02 17:45 ` David Ahern
2020-02-02 19:12 ` Jakub Kicinski
2020-02-02 17:43 ` David Ahern
2020-02-02 19:31 ` Jakub Kicinski
2020-02-02 21:51 ` David Ahern
2020-02-01 15:59 ` Toke Høiland-Jørgensen
2020-02-02 17:54 ` David Ahern
2020-02-03 20:09 ` Toke Høiland-Jørgensen
2020-01-23 1:42 ` [PATCH bpf-next 04/12] net: core: rename netif_receive_generic_xdp() to do_generic_xdp_core() David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 05/12] tuntap: check tun_msg_ctl type at necessary places David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 06/12] tun: move shared functions to if_tun.h David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 07/12] vhost_net: user tap recvmsg api to access ptr ring David Ahern
2020-01-23 8:26 ` Michael S. Tsirkin
2020-01-23 1:42 ` [PATCH bpf-next 08/12] tuntap: remove usage of ptr ring in vhost_net David Ahern
2020-01-23 1:42 ` David Ahern [this message]
2020-01-23 1:42 ` [PATCH bpf-next 10/12] tun: run XDP program in tx path David Ahern
2020-01-23 8:23 ` Michael S. Tsirkin
2020-01-24 13:36 ` Prashant Bhole
2020-01-24 13:44 ` Prashant Bhole
2020-01-23 1:42 ` [PATCH bpf-next 11/12] libbpf: Add egress XDP support David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 12/12] samples/bpf: xdp1, add " David Ahern
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