[PATCH v2 1/2] net/pcap: physical interface MAC support

[Juhamatti Kuusisaari <Juhamatti.Kuusisaari@coriant.com>]

Support for PCAP MAC address using physical interface MAC.
Support for getting proper link status, speed and duplex.

Signed-off-by: Juhamatti Kuusisaari <juhamatti.kuusisaari@coriant.com>
---
 config/common_base              |  1 +
 drivers/net/pcap/rte_eth_pcap.c | 52 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/config/common_base b/config/common_base
index c2b0d91..9804585 100644
--- a/config/common_base
+++ b/config/common_base
@@ -410,6 +410,7 @@ CONFIG_RTE_LIBRTE_PMD_NULL=y
 # Compile software PMD backed by PCAP files
 #
 CONFIG_RTE_LIBRTE_PMD_PCAP=n
+CONFIG_RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT=n
 
 #
 # Compile example software rings based PMD
diff --git a/drivers/net/pcap/rte_eth_pcap.c b/drivers/net/pcap/rte_eth_pcap.c
index c1571e1..d2aba1c 100644
--- a/drivers/net/pcap/rte_eth_pcap.c
+++ b/drivers/net/pcap/rte_eth_pcap.c
@@ -7,6 +7,13 @@
 #include <time.h>
 
 #include <net/if.h>
+#ifdef RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+#endif /* RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT */
 
 #include <pcap.h>
 
@@ -67,6 +74,10 @@ struct pmd_internals {
 	struct pcap_tx_queue tx_queue[RTE_PMD_PCAP_MAX_QUEUES];
 	int if_index;
 	int single_iface;
+#ifdef RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT
+	const char *if_name;
+	int if_fd;
+#endif /* RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT */
 };
 
 struct pmd_devargs {
@@ -602,6 +613,27 @@ static int
 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 		int wait_to_complete __rte_unused)
 {
+#ifdef RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT
+	struct ifreq ifr;
+	struct ethtool_cmd cmd;
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	if (internals->if_name && (internals->if_fd != -1)) {
+		/* Get link status, speed and duplex from the underlying interface */
+		strncpy(ifr.ifr_name, internals->if_name, sizeof(ifr.ifr_name)-1);
+		ifr.ifr_name[sizeof(ifr.ifr_name)-1] = 0;
+		if (!ioctl(internals->if_fd, SIOCGIFFLAGS, &ifr))
+			dev->data->dev_link.link_status = (ifr.ifr_flags & IFF_UP) ? 1 : 0;
+
+		cmd.cmd = ETHTOOL_GSET;
+		ifr.ifr_data = (void *)&cmd;
+		if (!ioctl(internals->if_fd, SIOCETHTOOL, &ifr)) {
+			dev->data->dev_link.link_speed = ethtool_cmd_speed(&cmd);
+			dev->data->dev_link.link_duplex =
+				cmd.duplex ? ETH_LINK_FULL_DUPLEX : ETH_LINK_HALF_DUPLEX;
+		}
+	}
+#endif /* RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT */
 	return 0;
 }
 
@@ -866,8 +898,26 @@ eth_from_pcaps_common(struct rte_vdev_device *vdev,
 
 	if (pair == NULL)
 		(*internals)->if_index = 0;
-	else
+	else {
 		(*internals)->if_index = if_nametoindex(pair->value);
+#ifdef RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT
+		/* Use real interface mac addr, save name and fd for eth_link_update() */
+		(*internals)->if_name = strdup(pair->value);
+		(*internals)->if_fd = socket(AF_INET, SOCK_DGRAM, 0);
+		if ((*internals)->if_fd != -1) {
+			struct ifreq ifr;
+			strncpy(ifr.ifr_name, pair->value, sizeof(ifr.ifr_name)-1);
+			ifr.ifr_name[sizeof(ifr.ifr_name)-1] = 0;
+			if (!ioctl((*internals)->if_fd, SIOCGIFHWADDR, &ifr)) {
+				(*eth_dev)->data->mac_addrs = rte_zmalloc_socket(NULL, ETHER_ADDR_LEN, 0, vdev->device.numa_node);
+				rte_memcpy((*eth_dev)->data->mac_addrs, ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);
+			}
+		}
+#endif /* RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT */
+	}
+#ifdef RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT
+	eth_link_update((*eth_dev), 0);
+#endif /* RTE_LIBRTE_PMD_PCAP_IF_MAC_SUPPORT */
 
 	return 0;
 }
-- 
2.8.1