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Miller" , "Michael S . Tsirkin" Subject: [RFC net-next 10/18] tun: handle XDP_TX action of offloaded program Date: Tue, 26 Nov 2019 19:07:36 +0900 Message-Id: <20191126100744.5083-11-prashantbhole.linux@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191126100744.5083-1-prashantbhole.linux@gmail.com> References: <20191126100744.5083-1-prashantbhole.linux@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::444 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Song Liu , Jakub Kicinski , Jesper Dangaard Brouer , Daniel Borkmann , netdev@vger.kernel.org, Jason Wang , John Fastabend , Alexei Starovoitov , qemu-devel@nongnu.org, Prashant Bhole , kvm@vger.kernel.org, Yonghong Song , Andrii Nakryiko , Martin KaFai Lau Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" When offloaded program returns XDP_TX, we need to inject the packet in Rx path of tun. This patch injects such packets in Rx path using tun_xdp_one. Signed-off-by: Prashant Bhole --- drivers/net/tun.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 8d6cdd3e5139..084ca95358fe 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -2249,7 +2249,13 @@ static u32 tun_do_xdp_offload(struct tun_struct *tun= , struct tun_file *tfile, case XDP_PASS: break; case XDP_TX: - /* fall through */ + tpage.page =3D NULL; + tpage.count =3D 0; + tun_xdp_one(tun, tfile, &xdp, &flush, &tpage, false); + tun_put_page(&tpage); + if (flush) + xdp_do_flush_map(); + break; case XDP_REDIRECT: /* fall through */ default: --=20 2.20.1