The underlying linux device's MTU is changed subject to the frame size
limitations during device creation.
Signed-off-by: Charles (Chas) Williams <ciwil...@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 4ef61a2..a700b96 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -412,12 +412,41 @@ 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
