From: Jesper Dangaard Brouer <brouer@redhat.com>
To: sameehj@amazon.com
Cc: "Jesper Dangaard Brouer" <brouer@redhat.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org, zorik@amazon.com,
akiyano@amazon.com, gtzalik@amazon.com,
"Toke Høiland-Jørgensen" <toke@toke.dk>,
"Daniel Borkmann" <borkmann@iogearbox.net>,
"Alexei Starovoitov" <alexei.starovoitov@gmail.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Alexander Duyck" <alexander.duyck@gmail.com>,
"Jeff Kirsher" <jeffrey.t.kirsher@intel.com>,
"David Ahern" <dsahern@gmail.com>,
"Willem de Bruijn" <willemdebruijn.kernel@gmail.com>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
"Lorenzo Bianconi" <lorenzo@kernel.org>
Subject: [PATCH RFC v1 13/15] tun: add XDP frame size
Date: Tue, 17 Mar 2020 18:30:13 +0100 [thread overview]
Message-ID: <158446621378.702578.2512691726801096724.stgit@firesoul> (raw)
In-Reply-To: <158446612466.702578.2795159620575737080.stgit@firesoul>
The tun driver have two code paths for running XDP (bpf_prog_run_xdp).
In both cases 'buflen' contains enough tailroom for skb_shared_info.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
drivers/net/tun.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 79f248cb282d..c540ff2f5774 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1706,6 +1706,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun,
xdp_set_data_meta_invalid(&xdp);
xdp.data_end = xdp.data + len;
xdp.rxq = &tfile->xdp_rxq;
+ xdp.frame_sz = buflen;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
if (act == XDP_REDIRECT || act == XDP_TX) {
@@ -2445,6 +2446,7 @@ static int tun_xdp_one(struct tun_struct *tun,
}
xdp_set_data_meta_invalid(xdp);
xdp->rxq = &tfile->xdp_rxq;
+ xdp->frame_sz = buflen;
act = bpf_prog_run_xdp(xdp_prog, xdp);
err = tun_xdp_act(tun, xdp_prog, xdp, act);
next prev parent reply other threads:[~2020-03-17 17:30 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-17 17:29 [PATCH RFC v1 00/15] XDP extend with knowledge of frame size Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 01/15] xdp: add frame size to xdp_buff Jesper Dangaard Brouer
2020-03-17 20:42 ` Jakub Kicinski
2020-03-18 6:58 ` Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 02/15] mvneta: add XDP frame size to driver Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 03/15] bnxt: " Jesper Dangaard Brouer
2020-03-20 19:22 ` Andy Gospodarek
2020-03-23 14:18 ` Andy Gospodarek
2020-03-23 14:44 ` Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 04/15] ixgbe: fix XDP redirect on archs with PAGE_SIZE above 4K Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 05/15] ixgbe: add XDP frame size to driver Jesper Dangaard Brouer
2020-03-18 20:03 ` Maciej Fijalkowski
2020-03-18 21:23 ` Alexander Duyck
2020-03-20 21:44 ` Jesper Dangaard Brouer
2020-03-20 22:37 ` Alexander Duyck
2020-03-17 17:29 ` [PATCH RFC v1 06/15] sfc: fix XDP-redirect in this driver Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 07/15] sfc: add XDP frame size Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 08/15] xdp: allow bpf_xdp_adjust_tail() to grow packet size Jesper Dangaard Brouer
2020-03-17 17:29 ` [PATCH RFC v1 09/15] xdp: clear grow memory in bpf_xdp_adjust_tail() Jesper Dangaard Brouer
2020-03-17 20:38 ` Jakub Kicinski
2020-03-18 9:15 ` Toke Høiland-Jørgensen
2020-03-18 10:25 ` Jesper Dangaard Brouer
2020-03-19 5:35 ` Alexei Starovoitov
2020-03-17 17:29 ` [PATCH RFC v1 10/15] net: XDP-generic determining XDP frame size Jesper Dangaard Brouer
2020-03-17 17:30 ` [PATCH RFC v1 11/15] xdp: xdp_frame add member frame_sz and handle in convert_to_xdp_frame Jesper Dangaard Brouer
2020-03-17 17:30 ` [PATCH RFC v1 12/15] xdp: cpumap redirect use frame_sz and increase skb_tailroom Jesper Dangaard Brouer
2020-03-17 17:30 ` Jesper Dangaard Brouer [this message]
2020-03-17 17:30 ` [PATCH RFC v1 14/15] veth: xdp using frame_sz in veth driver Jesper Dangaard Brouer
2020-03-17 17:30 ` [PATCH RFC v1 15/15] dpaa2-eth: add XDP frame size Jesper Dangaard Brouer
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