[dpdk-dev] [RFC PATCH 1/5] kni: change and configure mac address

[Hemant Agrawal]

This patch adds following:
1. option to configure the mac address during create
2. inform usespace, if mac address is being changed in linux

Signed-off-by: Hemant Agrawal <hemant.agrawal at nxp.com>
---
 .../linuxapp/eal/include/exec-env/rte_kni_common.h        |  3 +++
 lib/librte_eal/linuxapp/kni/kni_misc.c                    |  6 +++++-
 lib/librte_eal/linuxapp/kni/kni_net.c                     | 15 +++++++++++++--
 lib/librte_kni/rte_kni.c                                  | 12 ++++++++++++
 lib/librte_kni/rte_kni.h                                  |  8 ++++++++
 5 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
index 2ac879f..e9fdc73 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
@@ -80,6 +80,7 @@ enum rte_kni_req_id {
 	RTE_KNI_REQ_UNKNOWN = 0,
 	RTE_KNI_REQ_CHANGE_MTU,
 	RTE_KNI_REQ_CFG_NETWORK_IF,
+	RTE_KNI_REQ_CHANGE_MAC_ADDR,
 	RTE_KNI_REQ_MAX,
 };
 
@@ -92,6 +93,7 @@ struct rte_kni_request {
 	union {
 		uint32_t new_mtu;    /**< New MTU */
 		uint8_t if_up;       /**< 1: interface up, 0: interface down */
+		uint8_t mac_addr[6]; /**< MAC address for interface */
 	};
 	int32_t result;               /**< Result for processing request */
 } __attribute__((__packed__));
@@ -168,6 +170,7 @@ struct rte_kni_device_info {
 
 	/* mbuf size */
 	unsigned mbuf_size;
+	char macaddr[6];              /**< Mac Address */
 };
 
 #define KNI_DEVICE "kni"
diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c
index 7590f1f..90879fa 100644
--- a/lib/librte_eal/linuxapp/kni/kni_misc.c
+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
@@ -458,12 +458,16 @@ struct kni_net {
 
 	if (kni->lad_dev)
 		ether_addr_copy(net_dev->dev_addr, kni->lad_dev->dev_addr);
-	else
+	else {
 		/*
 		 * Generate random mac address. eth_random_addr() is the newer
 		 * version of generating mac address in linux kernel.
 		 */
 		random_ether_addr(net_dev->dev_addr);
+		
+		/* todo - check if user supplied mac address is available*/
+		memcpy(net_dev->dev_addr, dev_info.macaddr, ETH_ALEN);
+	}
 
 	ret = register_netdev(net_dev);
 	if (ret) {
diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c b/lib/librte_eal/linuxapp/kni/kni_net.c
index db9f489..866cbdd 100644
--- a/lib/librte_eal/linuxapp/kni/kni_net.c
+++ b/lib/librte_eal/linuxapp/kni/kni_net.c
@@ -668,12 +668,23 @@
 static int
 kni_net_set_mac(struct net_device *netdev, void *p)
 {
+	int ret;
+	struct rte_kni_request req;
 	struct sockaddr *addr = p;
+	struct kni_dev *kni;
+
+	kni = netdev_priv(netdev);
+	memset(&req, 0, sizeof(req));
+	req.req_id = RTE_KNI_REQ_CHANGE_MAC_ADDR;
 
-	if (!is_valid_ether_addr((unsigned char *)(addr->sa_data)))
+	if (!is_valid_ether_addr((unsigned char *)(addr->sa_data))) {
 		return -EADDRNOTAVAIL;
+	}
+	memcpy(req.mac_addr, addr->sa_data, netdev->addr_len);
 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
-	return 0;
+	ret = kni_net_process_request(kni, &req);
+
+	return (ret == 0 ? req.result : ret);
 }
 
 #ifdef HAVE_CHANGE_CARRIER_CB
diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index 52fcd4b..d5a717b 100644
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -52,6 +52,10 @@
 
 #define MAX_MBUF_BURST_NUM            32
 
+#ifndef ETH_ADDR_LEN
+#define ETH_ADDR_LEN                  6
+#endif
+
 /* Maximum number of ring entries */
 #define KNI_FIFO_COUNT_MAX     1024
 #define KNI_FIFO_SIZE          (KNI_FIFO_COUNT_MAX * sizeof(void *) + \
@@ -368,6 +372,8 @@ struct rte_kni *
 	dev_info.group_id = conf->group_id;
 	dev_info.mbuf_size = conf->mbuf_size;
 
+	memcpy(dev_info.macaddr, conf->macaddr, ETH_ADDR_LEN);
+
 	snprintf(ctx->name, RTE_KNI_NAMESIZE, "%s", intf_name);
 	snprintf(dev_info.name, RTE_KNI_NAMESIZE, "%s", intf_name);
 
@@ -541,6 +547,11 @@ struct rte_kni *
 			req->result = kni->ops.config_network_if(\
 					kni->ops.port_id, req->if_up);
 		break;
+	case RTE_KNI_REQ_CHANGE_MAC_ADDR: /* Change MAC Address */
+		if (kni->ops.config_mac_address)
+			req->result = kni->ops.config_mac_address(kni->ops.port_id,
+							req->mac_addr);
+		break;
 	default:
 		RTE_LOG(ERR, KNI, "Unknown request id %u\n", req->req_id);
 		req->result = -EINVAL;
@@ -735,6 +746,7 @@ struct rte_kni *
 
 	kni->ops.change_mtu = NULL;
 	kni->ops.config_network_if = NULL;
+	kni->ops.config_mac_address = NULL;
 	return 0;
 }
 void
diff --git a/lib/librte_kni/rte_kni.h b/lib/librte_kni/rte_kni.h
index 37deb47..5d2a233 100644
--- a/lib/librte_kni/rte_kni.h
+++ b/lib/librte_kni/rte_kni.h
@@ -59,6 +59,10 @@
 struct rte_kni;
 struct rte_mbuf;
 
+#ifndef ETH_ADDR_LEN
+#define ETH_ADDR_LEN                  6
+#endif
+
 /**
  * Structure which has the function pointers for KNI interface.
  */
@@ -70,6 +74,9 @@ struct rte_kni_ops {
 
 	/* Pointer to function of configuring network interface */
 	int (*config_network_if)(uint8_t port_id, uint8_t if_up);
+
+	/* Pointer to function of configuring mac address */
+	int (*config_mac_address)(uint8_t port_id, uint8_t mac_addr[6]);
 };
 
 /**
@@ -87,6 +94,7 @@ struct rte_kni_conf {
 	unsigned mbuf_size; /* mbuf size */
 	struct rte_pci_addr addr;
 	struct rte_pci_id id;
+	char macaddr[ETH_ADDR_LEN]; /* MAC address assigned to KNI */
 
 	__extension__
 	uint8_t force_bind : 1; /* Flag to bind kernel thread */
-- 
1.9.1