[PATCH 1/4] net/af_packet: add iface name to internals

[PATCH 1/4] net/af_packet: add iface name to internals

[Charles (Chas) Williams]

This will be used by later changes to determine the underlying linux
interface.

Signed-off-by: Chas Williams <ciwillia@brocade.com>
---
 drivers/net/af_packet/rte_eth_af_packet.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index a1e13ff..5541fd7 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -99,6 +99,7 @@ struct pmd_internals {
 	unsigned nb_queues;
 
 	int if_index;
+	char *if_name;
 	struct ether_addr eth_addr;
 
 	struct tpacket_req req;
@@ -533,6 +534,7 @@ rte_pmd_init_internals(const char *name,
 		        name);
 		goto error_early;
 	}
+	(*internals)->if_name = strdup(pair->value);
 	(*internals)->if_index = ifr.ifr_ifindex;
 
 	if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
@@ -724,6 +726,7 @@ rte_pmd_init_internals(const char *name,
 			((*internals)->rx_queue[q].sockfd != qsockfd))
 			close((*internals)->rx_queue[q].sockfd);
 	}
+	rte_free((*internals)->if_name);
 	rte_free(*internals);
 error_early:
 	rte_free(data);
@@ -892,6 +895,7 @@ rte_pmd_af_packet_remove(const char *name)
 		rte_free(internals->rx_queue[q].rd);
 		rte_free(internals->tx_queue[q].rd);
 	}
+	rte_free(internals->if_name);
 
 	rte_free(eth_dev->data->dev_private);
 	rte_free(eth_dev->data);
-- 
2.1.4

[PATCH 2/4] net/af_packet: add support to change mtu

[Charles (Chas) Williams]

The underlying linux device's MTU is changed subject to the frame size
limitations during device creation.

Signed-off-by: Charles (Chas) Williams <ciwillia@brocade.com>
---
 drivers/net/af_packet/rte_eth_af_packet.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index 5541fd7..d8ac5c6 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -413,12 +413,41 @@ eth_tx_queue_setup(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_mtu = mtu };
+	int ret;
+	int s;
+	unsigned int data_size = internals->req.tp_frame_size -
+				 TPACKET2_HDRLEN -
+				 sizeof(struct sockaddr_ll);
+
+	if (mtu > data_size)
+		return -EINVAL;
+
+	s = socket(PF_INET, SOCK_DGRAM, 0);
+	if (s < 0)
+		return -EINVAL;
+
+	strncpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
+	ret = ioctl(s, SIOCSIFMTU, &ifr);
+	close(s);
+
+	if (ret < 0)
+		return -EINVAL;
+
+	return 0;
+}
+
 static const struct eth_dev_ops ops = {
 	.dev_start = eth_dev_start,
 	.dev_stop = eth_dev_stop,
 	.dev_close = eth_dev_close,
 	.dev_configure = eth_dev_configure,
 	.dev_infos_get = eth_dev_info,
+	.mtu_set = eth_dev_mtu_set,
 	.rx_queue_setup = eth_rx_queue_setup,
 	.tx_queue_setup = eth_tx_queue_setup,
 	.rx_queue_release = eth_queue_release,
-- 
2.1.4

[PATCH 3/4] net/af_packet: promisicuous support

[Charles (Chas) Williams]

Add promiscuous support to the AF_PACKET PMD.  The underlying linux
device's IF_PROMISC flag is toggled to enable or disable.

Signed-off-by: Charles (Chas) Williams <ciwillia@brocade.com>
---
 drivers/net/af_packet/rte_eth_af_packet.c | 40 +++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index d8ac5c6..b01a8d1 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -441,6 +441,44 @@ eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	return 0;
 }
 
+static void
+eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
+{
+	struct ifreq ifr;
+	int s;
+
+	s = socket(PF_INET, SOCK_DGRAM, 0);
+	if (s < 0)
+		return;
+
+	strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
+	if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
+		goto out;
+	ifr.ifr_flags &= mask;
+	ifr.ifr_flags |= flags;
+	if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
+		goto out;
+out:
+	close(s);
+	return;
+}
+
+static void
+eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
+}
+
+static void
+eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
+}
+
 static const struct eth_dev_ops ops = {
 	.dev_start = eth_dev_start,
 	.dev_stop = eth_dev_stop,
@@ -448,6 +486,8 @@ static const struct eth_dev_ops ops = {
 	.dev_configure = eth_dev_configure,
 	.dev_infos_get = eth_dev_info,
 	.mtu_set = eth_dev_mtu_set,
+	.promiscuous_disable = eth_dev_promiscuous_disable,
+	.promiscuous_enable = eth_dev_promiscuous_enable,
 	.rx_queue_setup = eth_rx_queue_setup,
 	.tx_queue_setup = eth_tx_queue_setup,
 	.rx_queue_release = eth_queue_release,
-- 
2.1.4

[PATCH 4/4] net/af_packet: add 802.1Q (VLAN) support

[Charles (Chas) Williams]

AF_PACKET has some flags to check on the receive side for 802.1Q
information.  If present, we copy into the mbuf.  For transmit, we
insert any 802.1Q information into the packet before copying to the ring.

Signed-off-by: Charles (Chas) Williams <ciwillia@brocade.com>
---
 drivers/net/af_packet/rte_eth_af_packet.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index b01a8d1..7f1df92 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -161,6 +161,12 @@ eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 		pbuf = (uint8_t *) ppd + ppd->tp_mac;
 		memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 
+		/* check for vlan info */
+		if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
+			mbuf->vlan_tci = ppd->tp_vlan_tci;
+			mbuf->ol_flags |= (PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED);
+		}
+
 		/* release incoming frame and advance ring buffer */
 		ppd->tp_status = TP_STATUS_KERNEL;
 		if (++framenum >= framecount)
@@ -214,6 +220,14 @@ eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 			continue;
 		}
 
+		/* insert vlan info if necessary */
+		if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+			if (rte_vlan_insert(&mbuf)) {
+				rte_pktmbuf_free(mbuf);
+				continue;
+			}
+		}
+
 		/* point at the next incoming frame */
 		if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 		    (poll(&pfd, 1, -1) < 0))
-- 
2.1.4