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Miller" , "Michael S . Tsirkin" Subject: [RFC net-next 11/18] tun: run xdp prog when tun is read from file interface Date: Tue, 26 Nov 2019 19:07:37 +0900 Message-Id: <20191126100744.5083-12-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::542 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" It handles the case when qemu performs read on tun using file operations. Signed-off-by: Prashant Bhole --- drivers/net/tun.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 084ca95358fe..639921c10e32 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -2318,8 +2318,10 @@ static ssize_t tun_do_read(struct tun_struct *tun, s= truct tun_file *tfile, struct iov_iter *to, int noblock, void *ptr) { + struct xdp_frame *frame; ssize_t ret; int err; + u32 act; =20 tun_debug(KERN_INFO, tun, "tun_do_read\n"); =20 @@ -2333,6 +2335,15 @@ static ssize_t tun_do_read(struct tun_struct *tun, s= truct tun_file *tfile, ptr =3D tun_ring_recv(tfile, noblock, &err); if (!ptr) return err; + + if (tun_is_xdp_frame(ptr)) { + frame =3D tun_ptr_to_xdp(ptr); + act =3D tun_do_xdp_offload(tun, tfile, frame); + } else { + act =3D tun_do_xdp_offload_generic(tun, ptr); + } + if (act !=3D XDP_PASS) + return err; } =20 if (tun_is_xdp_frame(ptr)) { --=20 2.20.1