diff mbox series

[v7] net/pcap: physical interface MAC address support

Message ID 20181005202723.47967-1-ferruh.yigit@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers show
Series [v7] net/pcap: physical interface MAC address support | expand

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Ferruh Yigit Oct. 5, 2018, 8:27 p.m. UTC
From: Juhamatti Kuusisaari <Juhamatti.Kuusisaari@coriant.com>

At the moment, PCAP interfaces use dummy MAC by default. This change
adds support for selecting PCAP physical interface MAC with phy_mac=1
devarg. This allows to setup packet flows using the physical interface
MAC.

Signed-off-by: Juhamatti Kuusisaari <juhamatti.kuusisaari@coriant.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
v7:
* Add internal->phy_mac to be able to free data->mac_addrs
* code review comments applied
* doc format updates
* NOTE: FreeBSD functionality not tested
---
 doc/guides/nics/pcap_ring.rst          |  10 ++
 doc/guides/rel_notes/release_18_11.rst |   4 +
 drivers/net/pcap/rte_eth_pcap.c        | 142 ++++++++++++++++++++++++-
 3 files changed, 151 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/doc/guides/nics/pcap_ring.rst b/doc/guides/nics/pcap_ring.rst
index 879e5430f..c1ef9196b 100644
--- a/doc/guides/nics/pcap_ring.rst
+++ b/doc/guides/nics/pcap_ring.rst
@@ -96,6 +96,16 @@  The different stream types are:
 
         iface=eth0
 
+Runtime Config Options
+^^^^^^^^^^^^^^^^^^^^^^
+
+- Use PCAP interface physical MAC
+
+ In case ``iface=`` configuration is set, user may want to use the selected interface's physical MAC
+ address. This can be done with a ``devarg`` ``phy_mac``, for example::
+
+   --vdev 'net_pcap0,iface=eth0,phy_mac=1'
+
 Examples of Usage
 ^^^^^^^^^^^^^^^^^
 
diff --git a/doc/guides/rel_notes/release_18_11.rst b/doc/guides/rel_notes/release_18_11.rst
index 89ca3317f..491d97f13 100644
--- a/doc/guides/rel_notes/release_18_11.rst
+++ b/doc/guides/rel_notes/release_18_11.rst
@@ -98,6 +98,10 @@  New Features
   * Support for runtime Rx and Tx queues setup.
   * Support multicast MAC address set.
 
+* **Added a devarg to use PCAP interface physical MAC address.**
+  A new devarg ``phy_mac`` was introduced to allow users to use physical
+  MAC address of the selected PCAP interface.
+
 * **Added Event Ethernet Tx Adapter.**
 
   Added event ethernet Tx adapter library that  provides configuration and
diff --git a/drivers/net/pcap/rte_eth_pcap.c b/drivers/net/pcap/rte_eth_pcap.c
index 8736010f0..2b60e7b64 100644
--- a/drivers/net/pcap/rte_eth_pcap.c
+++ b/drivers/net/pcap/rte_eth_pcap.c
@@ -7,6 +7,14 @@ 
 #include <time.h>
 
 #include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#if defined(RTE_EXEC_ENV_BSDAPP)
+#include <sys/sysctl.h>
+#include <net/if_dl.h>
+#endif
 
 #include <pcap.h>
 
@@ -17,6 +25,7 @@ 
 #include <rte_malloc.h>
 #include <rte_mbuf.h>
 #include <rte_bus_vdev.h>
+#include <rte_string_fns.h>
 
 #define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
 #define RTE_ETH_PCAP_SNAPLEN ETHER_MAX_JUMBO_FRAME_LEN
@@ -29,6 +38,7 @@ 
 #define ETH_PCAP_RX_IFACE_IN_ARG "rx_iface_in"
 #define ETH_PCAP_TX_IFACE_ARG "tx_iface"
 #define ETH_PCAP_IFACE_ARG    "iface"
+#define ETH_PCAP_PHY_MAC_ARG  "phy_mac"
 
 #define ETH_PCAP_ARG_MAXLEN	64
 
@@ -70,6 +80,7 @@  struct pmd_internals {
 	struct ether_addr eth_addr;
 	int if_index;
 	int single_iface;
+	int phy_mac;
 };
 
 struct pmd_devargs {
@@ -89,6 +100,7 @@  static const char *valid_arguments[] = {
 	ETH_PCAP_RX_IFACE_IN_ARG,
 	ETH_PCAP_TX_IFACE_ARG,
 	ETH_PCAP_IFACE_ARG,
+	ETH_PCAP_PHY_MAC_ARG,
 	NULL
 };
 
@@ -859,6 +871,20 @@  open_tx_iface(const char *key, const char *value, void *extra_args)
 	return open_iface(key, value, extra_args);
 }
 
+static int
+select_phy_mac(const char *key __rte_unused, const char *value,
+		void *extra_args)
+{
+	if (extra_args) {
+		const int phy_mac = atoi(value);
+		int *enable_phy_mac = extra_args;
+
+		if (phy_mac)
+			*enable_phy_mac = 1;
+	}
+	return 0;
+}
+
 static struct rte_vdev_driver pmd_pcap_drv;
 
 static int
@@ -894,6 +920,7 @@  pmd_init_internals(struct rte_vdev_device *vdev,
 	(*internals)->eth_addr = (struct ether_addr) {
 		.addr_bytes = { 0x02, 0x70, 0x63, 0x61, 0x70, iface_idx++ }
 	};
+	(*internals)->phy_mac = 0;
 	data = (*eth_dev)->data;
 	data->nb_rx_queues = (uint16_t)nb_rx_queues;
 	data->nb_tx_queues = (uint16_t)nb_tx_queues;
@@ -909,12 +936,96 @@  pmd_init_internals(struct rte_vdev_device *vdev,
 	return 0;
 }
 
+static int
+eth_pcap_update_mac(const char *if_name, struct rte_eth_dev *eth_dev,
+		const unsigned int numa_node)
+{
+#if defined(RTE_EXEC_ENV_LINUXAPP)
+	void *mac_addrs;
+	struct ifreq ifr;
+	int if_fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+	if (if_fd == -1)
+		return -1;
+
+	rte_strscpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
+	if (ioctl(if_fd, SIOCGIFHWADDR, &ifr)) {
+		close(if_fd);
+		return -1;
+	}
+
+	mac_addrs = rte_zmalloc_socket(NULL, ETHER_ADDR_LEN, 0, numa_node);
+	if (!mac_addrs) {
+		close(if_fd);
+		return -1;
+	}
+
+	PMD_LOG(INFO, "Setting phy MAC for %s", if_name);
+	eth_dev->data->mac_addrs = mac_addrs;
+	rte_memcpy(eth_dev->data->mac_addrs[0].addr_bytes,
+			ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
+
+	close(if_fd);
+
+	return 0;
+
+#elif defined(RTE_EXEC_ENV_BSDAPP)
+	void *mac_addrs;
+	struct if_msghdr *ifm;
+	struct sockaddr_dl *sdl;
+	int mib[6];
+	size_t len = 0;
+	char *buf;
+
+	mib[0] = CTL_NET;
+	mib[1] = AF_ROUTE;
+	mib[2] = 0;
+	mib[3] = AF_LINK;
+	mib[4] = NET_RT_IFLIST;
+	mib[5] = if_nametoindex(if_name);
+
+	if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
+		return -1;
+
+	if (len == 0)
+		return -1;
+
+	buf = rte_malloc(NULL, len, 0);
+	if (!buf)
+		return -1;
+
+	if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
+		rte_free(buf);
+		return -1;
+	}
+	ifm = (struct if_msghdr *)buf;
+	sdl = (struct sockaddr_dl *)(ifm + 1);
+
+	mac_addrs = rte_zmalloc_socket(NULL, ETHER_ADDR_LEN, 0, numa_node);
+	if (!mac_addrs) {
+		rte_free(buf);
+		return -1;
+	}
+
+	PMD_LOG(INFO, "Setting phy MAC for %s", if_name);
+	eth_dev->data->mac_addrs = mac_addrs;
+	rte_memcpy(eth_dev->data->mac_addrs[0].addr_bytes,
+			LLADDR(sdl), ETHER_ADDR_LEN);
+
+	rte_free(buf);
+
+	return 0;
+#else
+	return -1;
+#endif
+}
+
 static int
 eth_from_pcaps_common(struct rte_vdev_device *vdev,
 		struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
 		struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
 		struct rte_kvargs *kvlist, struct pmd_internals **internals,
-		struct rte_eth_dev **eth_dev)
+		const int phy_mac, struct rte_eth_dev **eth_dev)
 {
 	struct rte_kvargs_pair *pair = NULL;
 	unsigned int k_idx;
@@ -960,6 +1071,14 @@  eth_from_pcaps_common(struct rte_vdev_device *vdev,
 	else
 		(*internals)->if_index = if_nametoindex(pair->value);
 
+	/* phy_mac arg is applied only only if "iface" devarg is provided */
+	if (phy_mac && pair) {
+		int ret = eth_pcap_update_mac(pair->value, *eth_dev,
+				vdev->device.numa_node);
+		if (ret == 0)
+			(*internals)->phy_mac = 1;
+	}
+
 	return 0;
 }
 
@@ -967,7 +1086,7 @@  static int
 eth_from_pcaps(struct rte_vdev_device *vdev,
 		struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
 		struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
-		struct rte_kvargs *kvlist, int single_iface,
+		struct rte_kvargs *kvlist, int single_iface, int phy_mac,
 		unsigned int using_dumpers)
 {
 	struct pmd_internals *internals = NULL;
@@ -975,7 +1094,8 @@  eth_from_pcaps(struct rte_vdev_device *vdev,
 	int ret;
 
 	ret = eth_from_pcaps_common(vdev, rx_queues, nb_rx_queues,
-		tx_queues, nb_tx_queues, kvlist, &internals, &eth_dev);
+			tx_queues, nb_tx_queues, kvlist,
+			&internals, phy_mac, &eth_dev);
 
 	if (ret < 0)
 		return ret;
@@ -1004,6 +1124,7 @@  pmd_pcap_probe(struct rte_vdev_device *dev)
 	struct pmd_devargs dumpers = {0};
 	struct rte_eth_dev *eth_dev;
 	int single_iface = 0;
+	int phy_mac = 0;
 	int ret;
 
 	name = rte_vdev_device_name(dev);
@@ -1039,7 +1160,11 @@  pmd_pcap_probe(struct rte_vdev_device *dev)
 
 		ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG,
 				&open_rx_tx_iface, &pcaps);
+		if (ret < 0)
+			goto free_kvlist;
 
+		ret = rte_kvargs_process(kvlist, ETH_PCAP_PHY_MAC_ARG,
+				&select_phy_mac, &phy_mac);
 		if (ret < 0)
 			goto free_kvlist;
 
@@ -1089,7 +1214,8 @@  pmd_pcap_probe(struct rte_vdev_device *dev)
 
 create_eth:
 	ret = eth_from_pcaps(dev, &pcaps, pcaps.num_of_queue, &dumpers,
-		dumpers.num_of_queue, kvlist, single_iface, is_tx_pcap);
+			dumpers.num_of_queue, kvlist, single_iface,
+			phy_mac, is_tx_pcap);
 
 free_kvlist:
 	rte_kvargs_free(kvlist);
@@ -1100,6 +1226,7 @@  pmd_pcap_probe(struct rte_vdev_device *dev)
 static int
 pmd_pcap_remove(struct rte_vdev_device *dev)
 {
+	struct pmd_internals *internals = NULL;
 	struct rte_eth_dev *eth_dev = NULL;
 
 	PMD_LOG(INFO, "Closing pcap ethdev on numa socket %d",
@@ -1113,6 +1240,10 @@  pmd_pcap_remove(struct rte_vdev_device *dev)
 	if (eth_dev == NULL)
 		return -1;
 
+	internals = eth_dev->data->dev_private;
+	if (internals && internals->phy_mac)
+		rte_free(eth_dev->data->mac_addrs);
+
 	rte_free(eth_dev->data->dev_private);
 
 	rte_eth_dev_release_port(eth_dev);
@@ -1133,7 +1264,8 @@  RTE_PMD_REGISTER_PARAM_STRING(net_pcap,
 	ETH_PCAP_RX_IFACE_ARG "=<ifc> "
 	ETH_PCAP_RX_IFACE_IN_ARG "=<ifc> "
 	ETH_PCAP_TX_IFACE_ARG "=<ifc> "
-	ETH_PCAP_IFACE_ARG "=<ifc>");
+	ETH_PCAP_IFACE_ARG "=<ifc> "
+	ETH_PCAP_PHY_MAC_ARG "=<int>");
 
 RTE_INIT(eth_pcap_init_log)
 {