ethdev: introduce if_index in device info

This field is intended for pcap to describe the name of the interface
as known to Linux. It is an interface index, but can be translated into
an interface name using if_indextoname() function.

When using pcap, interrupt affinity becomes important, and this field
gives the application a chance to ensure that interrupt affinity is set
to the lcore handling the device.

Signed-off-by: Mats Liljegren <mats.liljegren@enea.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 5e8337c..a5727dd 100644 (file)
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1037,6 +1037,7 @@ rte_eth_dev_info_get(uint8_t port_id, struct rte_eth_dev_info *dev_info)
        /* Default device offload capabilities to zero */
        dev_info->rx_offload_capa = 0;
        dev_info->tx_offload_capa = 0;
+       dev_info->if_index = 0;
        FUNC_PTR_OR_RET(*dev->dev_ops->dev_infos_get);
        (*dev->dev_ops->dev_infos_get)(dev, dev_info);
        dev_info->pci_dev = dev->pci_dev;

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 1ac4c5c..dea7471 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -787,6 +787,8 @@ struct rte_eth_conf {
 struct rte_eth_dev_info {
        struct rte_pci_device *pci_dev; /**< Device PCI information. */
        const char *driver_name; /**< Device Driver name. */
+       unsigned int if_index; /**< Index to bound host interface, or 0 if none.
+               Use if_indextoname() to translate into an interface name. */
        uint32_t min_rx_bufsize; /**< Minimum size of RX buffer. */
        uint32_t max_rx_pktlen; /**< Maximum configurable length of RX pkt. */
        uint16_t max_rx_queues; /**< Maximum number of RX queues. */