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kni: add ability to set min/max MTU

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Starting with kernel version 4.10, there are new min/max MTU values in
net_device structure, which are set to ETH_MIN_MTU and ETH_DATA_LEN by
default. We should be able to change these values to allow MTU more than
1500 to be set on KNI.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit is contained in:
Igor Ryzhov 2019-10-25 19:30:58 +01:00 committed by David Marchand
parent 4b462021b4
commit 49e7e2dee3
5 changed files with 15 additions and 0 deletions
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3
examples/kni/main.c
View file

@ -949,6 +949,9 @@ kni_alloc(uint16_t port_id)
rte_eth_dev_get_mtu(port_id, &conf.mtu);
conf.min_mtu = dev_info.min_mtu;
conf.max_mtu = dev_info.max_mtu;
memset(&ops, 0, sizeof(ops));
ops.port_id = port_id;
ops.change_mtu = kni_change_mtu;

6
kernel/linux/kni/kni_misc.c
View file

@ -388,6 +388,12 @@ kni_ioctl_create(struct net *net, uint32_t ioctl_num,
net_dev->mtu = dev_info.mtu;
#ifdef HAVE_MAX_MTU_PARAM
net_dev->max_mtu = net_dev->mtu;
if (dev_info.min_mtu)
net_dev->min_mtu = dev_info.min_mtu;
if (dev_info.max_mtu)
net_dev->max_mtu = dev_info.max_mtu;
#endif
ret = register_netdev(net_dev);

2
lib/librte_eal/linux/eal/include/rte_kni_common.h
View file

@ -122,6 +122,8 @@ struct rte_kni_device_info {
/* mbuf size */
unsigned mbuf_size;
unsigned int mtu;
unsigned int min_mtu;
unsigned int max_mtu;
uint8_t mac_addr[6];
};

2
lib/librte_kni/rte_kni.c
View file

@ -252,6 +252,8 @@ rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
dev_info.group_id = conf->group_id;
dev_info.mbuf_size = conf->mbuf_size;
dev_info.mtu = conf->mtu;
dev_info.min_mtu = conf->min_mtu;
dev_info.max_mtu = conf->max_mtu;
memcpy(dev_info.mac_addr, conf->mac_addr, RTE_ETHER_ADDR_LEN);

2
lib/librte_kni/rte_kni.h
View file

@ -73,6 +73,8 @@ struct rte_kni_conf {
uint8_t force_bind : 1; /* Flag to bind kernel thread */
uint8_t mac_addr[RTE_ETHER_ADDR_LEN]; /* MAC address assigned to KNI */
uint16_t mtu;
uint16_t min_mtu;
uint16_t max_mtu;
};
/**