Re: [dpdk-dev] [PATCH v2 3/5] vhost: enable promisc mode and config VMDQ offload register for multicast feature

["Ouyang, Changchun" <changchun.ouyang@intel.com>]

Hi,

> -----Original Message-----
> From: Xie, Huawei
> Sent: Thursday, October 30, 2014 7:26 AM
> To: Ouyang, Changchun; dev@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH v2 3/5] vhost: enable promisc mode and
> config VMDQ offload register for multicast feature
> 
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ouyang
> Changchun
> > Sent: Sunday, October 26, 2014 8:46 PM
> > To: dev@dpdk.org
> > Subject: [dpdk-dev] [PATCH v2 3/5] vhost: enable promisc mode and
> > config VMDQ offload register for multicast feature
> >
> > This patch is to let vhost receive and forward multicast and broadcast
> > packets, add promiscuous option into command line; and set VMDQ RX
> mode as:
> > ETH_VMDQ_ACCEPT_BROADCAST|ETH_VMDQ_ACCEPT_MULTICAST if
> promisc mode is
> > on.
> >
> > Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> > ---
> >  examples/vhost/main.c         | 25 ++++++++++++++++++++++---
> >  lib/librte_vhost/virtio-net.c |  4 +++-
> >  2 files changed, 25 insertions(+), 4 deletions(-)
> >
> > diff --git a/examples/vhost/main.c b/examples/vhost/main.c index
> > 291128e..c4947f7 100644
> > --- a/examples/vhost/main.c
> > +++ b/examples/vhost/main.c
> > @@ -161,6 +161,9 @@
> >  /* mask of enabled ports */
> >  static uint32_t enabled_port_mask = 0;
> >
> > +/* Ports set in promiscuous mode off by default. */
> comment is confusing
Don't think it is confusing, 
But I can refine it a bit.
> > +static uint32_t promiscuous_on;
> > +
> >  /*Number of switching cores enabled*/  static uint32_t
> > num_switching_cores = 0;
> Don't initialize static variables to zero/NULL

I don't touch this line in my patch, and initialization to 0 is not an issue here. 

> >
> > @@ -274,6 +277,7 @@ static struct rte_eth_conf vmdq_conf_default = {
> >  			.enable_default_pool = 0,
> >  			.default_pool = 0,
> >  			.nb_pool_maps = 0,
> > +			.rx_mode = 0,
> >  			.pool_map = {{0, 0},},
> >  		},
> >  	},
> Same as above, do we need to initialize static var?
Response same as above,  no harm to initialize them to 0.
> 
> > @@ -364,13 +368,15 @@ static inline int  get_eth_conf(struct
> > rte_eth_conf *eth_conf, uint32_t num_devices)  {
> >  	struct rte_eth_vmdq_rx_conf conf;
> > +	struct rte_eth_vmdq_rx_conf *def_conf =
> > +		&vmdq_conf_default.rx_adv_conf.vmdq_rx_conf;
> >  	unsigned i;
> >
> >  	memset(&conf, 0, sizeof(conf));
> >  	conf.nb_queue_pools = (enum rte_eth_nb_pools)num_devices;
> >  	conf.nb_pool_maps = num_devices;
> > -	conf.enable_loop_back =
> > -
> > 	vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.enable_loop_back;
> > +	conf.enable_loop_back = def_conf->enable_loop_back;
> > +	conf.rx_mode = def_conf->rx_mode;
> >
> >  	for (i = 0; i < conf.nb_pool_maps; i++) {
> >  		conf.pool_map[i].vlan_id = vlan_tags[ i ]; @@ -468,6 +474,9
> @@
> > port_init(uint8_t port)
> >  		return retval;
> >  	}
> >
> > +	if (promiscuous_on)
> > +		rte_eth_promiscuous_enable(port);
> > +
> >  	rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
> >  	RTE_LOG(INFO, VHOST_PORT, "Max virtio devices supported: %u\n",
> > num_devices);
> >  	RTE_LOG(INFO, VHOST_PORT, "Port %u
> > MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
> > @@ -598,7 +607,8 @@ us_vhost_parse_args(int argc, char **argv)
> >  	};
> >
> >  	/* Parse command line */
> > -	while ((opt = getopt_long(argc, argv, "p:",long_option,
> > &option_index)) != EOF) {
> > +	while ((opt = getopt_long(argc, argv, "p:P",
> > +			long_option, &option_index)) != EOF) {
> >  		switch (opt) {
> >  		/* Portmask */
> >  		case 'p':
> > @@ -610,6 +620,15 @@ us_vhost_parse_args(int argc, char **argv)
> >  			}
> >  			break;
> >
> > +		case 'P':
> > +			promiscuous_on = 1;
> > +
> > 	vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.rx_mode =
> > +				ETH_VMDQ_ACCEPT_BROADCAST |
> > +				ETH_VMDQ_ACCEPT_MULTICAST;
> > +			rte_vhost_feature_enable(1ULL <<
> > VIRTIO_NET_F_CTRL_RX);
> 
> Alignment?
Checked it again, already aligned, your mail display should has some issue. :-)
> > +
> > +			break;
> > +
> >  		case 0:
> >  			/* Enable/disable vm2vm comms. */
> >  			if (!strncmp(long_option[option_index].name,
> "vm2vm", diff --git
> > a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c index
> > 27ba175..744156c 100644
> > --- a/lib/librte_vhost/virtio-net.c
> > +++ b/lib/librte_vhost/virtio-net.c
> > @@ -68,7 +68,9 @@ static struct virtio_net_device_ops const *notify_ops;
> >  static struct virtio_net_config_ll	*ll_root;
> >
> >  /* Features supported by this application. RX merge buffers are
> > enabled by default. */ -#define VHOST_SUPPORTED_FEATURES (1ULL <<
> > VIRTIO_NET_F_MRG_RXBUF)
> > +#define VHOST_SUPPORTED_FEATURES ((1ULL <<
> VIRTIO_NET_F_MRG_RXBUF)
> > | \
> > +	(1ULL << VIRTIO_NET_F_CTRL_RX))
> > +
> >  static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
> >
> >  /* Line size for reading maps file. */
> > --
> > 1.8.4.2

Thanks 
Changchun