linux-kernel - Re: [PATCH 4/4] macvlan: export macvlan mode through netlink

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Message-ID: <4B0BE401.4010209@trash.net>
Date:	Tue, 24 Nov 2009 14:47:45 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Arnd Bergmann <arnd@...db.de>
CC:	virtualization@...ts.linux-foundation.org,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Anna Fischer <anna.fischer@...com>, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Mark Smith <lk-netdev@...netdev.nosense.org>,
	Gerhard Stenzel <gerhard.stenzel@...ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Jens Osterkamp <jens@...ux.vnet.ibm.com>,
	Patrick Mullaney <pmullaney@...ell.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Edge Virtual Bridging <evb@...oogroups.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 4/4] macvlan: export macvlan mode through netlink

Arnd Bergmann wrote:
> Thanks for the review. Combined changes below.

Looks good, thanks.

> 
> 	Arnd <><
> ---
> 
>  drivers/net/macvlan.c |   47 +++++++++++++++++++++++------------------------
>  1 files changed, 23 insertions(+), 24 deletions(-)
> 
> --- a/drivers/net/macvlan.c
> +++ b/drivers/net/macvlan.c
> @@ -118,15 +118,16 @@ static int macvlan_addr_busy(const struct macvlan_port *port,
>  	return 0;
>  }
>  
> -static inline void macvlan_count_rx(const struct macvlan_dev *vlan, int length,
> -			     bool success, bool multicast)
> +static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
> +				    unsigned int len, bool success,
> +				    bool multicast)
>  {
>  	struct macvlan_rx_stats *rx_stats;
>  
>  	rx_stats = per_cpu_ptr(vlan->rx_stats, smp_processor_id());
>  	if (likely(success)) {
>  		rx_stats->rx_packets++;;
> -		rx_stats->rx_bytes += length;
> +		rx_stats->rx_bytes += len;
>  		if (multicast)
>  			rx_stats->multicast++;
>  	} else {
> @@ -170,7 +171,7 @@ static void macvlan_broadcast(struct sk_buff *skb,
>  
>  	for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
>  		hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
> -			if ((vlan->dev == src) || !(vlan->mode & mode))
> +			if (vlan->dev == src || !(vlan->mode & mode))
>  				continue;
>  
>  			nskb = skb_clone(skb, GFP_ATOMIC);
> @@ -190,7 +191,7 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
>  	const struct macvlan_dev *vlan;
>  	const struct macvlan_dev *src;
>  	struct net_device *dev;
> -	int len;
> +	unsigned int len;
>  
>  	port = rcu_dereference(skb->dev->macvlan_port);
>  	if (port == NULL)
> @@ -200,17 +201,22 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
>  		src = macvlan_hash_lookup(port, eth->h_source);
>  		if (!src)
>  			/* frame comes from an external address */
> -			macvlan_broadcast(skb, port, NULL, MACVLAN_MODE_PRIVATE
> -				| MACVLAN_MODE_VEPA | MACVLAN_MODE_BRIDGE);
> +			macvlan_broadcast(skb, port, NULL,
> +					  MACVLAN_MODE_PRIVATE |
> +					  MACVLAN_MODE_VEPA    |
> +					  MACVLAN_MODE_BRIDGE);
>  		else if (src->mode == MACVLAN_MODE_VEPA)
>  			/* flood to everyone except source */
>  			macvlan_broadcast(skb, port, src->dev,
> -				MACVLAN_MODE_VEPA | MACVLAN_MODE_BRIDGE);
> +					  MACVLAN_MODE_VEPA |
> +					  MACVLAN_MODE_BRIDGE);
>  		else if (src->mode == MACVLAN_MODE_BRIDGE)
> -			/* flood only to VEPA ports, bridge ports
> -			   already saw the frame */
> +			/*
> +			 * flood only to VEPA ports, bridge ports
> +			 * already saw the frame on the way out.
> +			 */
>  			macvlan_broadcast(skb, port, src->dev,
> -				MACVLAN_MODE_VEPA);
> +					  MACVLAN_MODE_VEPA);
>  		return skb;
>  	}
>  
> @@ -253,7 +259,7 @@ static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
>  
>  		dest = macvlan_hash_lookup(port, eth->h_dest);
>  		if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
> -			int length = skb->len + ETH_HLEN;
> +			unsigned int length = skb->len + ETH_HLEN;
>  			int ret = dev_forward_skb(dest->dev, skb);
>  			macvlan_count_rx(dest, length,
>  					 ret == NET_RX_SUCCESS, 0);
> @@ -604,8 +610,7 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
>  	}
>  
>  	if (data && data[IFLA_MACVLAN_MODE]) {
> -		u32 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
> -		switch (mode) {
> +		switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
>  		case MACVLAN_MODE_PRIVATE:
>  		case MACVLAN_MODE_VEPA:
>  		case MACVLAN_MODE_BRIDGE:
> @@ -679,11 +684,8 @@ static int macvlan_newlink(struct net *src_net, struct net_device *dev,
>  	vlan->port     = port;
>  
>  	vlan->mode     = MACVLAN_MODE_VEPA;
> -	if (data && data[IFLA_MACVLAN_MODE]) {
> -		u32 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
> -
> -		vlan->mode     = mode;
> -	}
> +	if (data && data[IFLA_MACVLAN_MODE])
> +		vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
>  
>  	err = register_netdevice(dev);
>  	if (err < 0)
> @@ -710,11 +712,8 @@ static int macvlan_changelink(struct net_device *dev,
>  		struct nlattr *tb[], struct nlattr *data[])
>  {
>  	struct macvlan_dev *vlan = netdev_priv(dev);
> -	if (data && data[IFLA_MACVLAN_MODE]) {
> -		u32 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
> -		vlan->mode     = mode;
> -	}
> -
> +	if (data && data[IFLA_MACVLAN_MODE])
> +		vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
>  	return 0;
>  }
>  
> 

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