[dpdk-dev] [RFC PATCH 3/5] kni: init and change request for mtu

[Hemant Agrawal <hemant.agrawal@nxp.com>]

1. Configure initial mtu.
2. Message to userspace for mtu change

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h | 1 +
 lib/librte_eal/linuxapp/kni/kni_misc.c                        | 2 ++
 lib/librte_kni/rte_kni.c                                      | 1 +
 lib/librte_kni/rte_kni.h                                      | 1 +
 4 files changed, 5 insertions(+)

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 c04fefd..2cd7d9a 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
@@ -172,6 +172,7 @@ struct rte_kni_device_info {
 
 	/* mbuf size */
 	unsigned mbuf_size;
+	unsigned int mtu;             /**< MTU */
 	char macaddr[6];              /**< Mac Address */
 };
 
diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c
index 90879fa..4f99a5e 100644
--- a/lib/librte_eal/linuxapp/kni/kni_misc.c
+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
@@ -469,6 +469,8 @@ struct kni_net {
 		memcpy(net_dev->dev_addr, dev_info.macaddr, ETH_ALEN);
 	}
 
+	net_dev->mtu = dev_info.mtu;
+
 	ret = register_netdev(net_dev);
 	if (ret) {
 		pr_err("error %i registering device \"%s\"\n",
diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index 8ae632f..a3aab9d 100644
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -373,6 +373,7 @@ struct rte_kni *
 	dev_info.mbuf_size = conf->mbuf_size;
 
 	memcpy(dev_info.macaddr, conf->macaddr, ETH_ADDR_LEN);
+	dev_info.mtu = conf->mtu;
 
 	snprintf(ctx->name, RTE_KNI_NAMESIZE, "%s", intf_name);
 	snprintf(dev_info.name, RTE_KNI_NAMESIZE, "%s", intf_name);
diff --git a/lib/librte_kni/rte_kni.h b/lib/librte_kni/rte_kni.h
index 488db4b..3156e33 100644
--- a/lib/librte_kni/rte_kni.h
+++ b/lib/librte_kni/rte_kni.h
@@ -98,6 +98,7 @@ struct rte_kni_conf {
 	struct rte_pci_addr addr;
 	struct rte_pci_id id;
 	char macaddr[ETH_ADDR_LEN]; /* MAC address assigned to KNI */
+	uint16_t mtu;	/* Maximum transmission Unit of KNI*/
 
 	__extension__
 	uint8_t force_bind : 1; /* Flag to bind kernel thread */
-- 
1.9.1