Subject: Re: [PATCH net-next 11/18] switchdev: remove old netdev_switch_port_bridge_setlink

From: roopa <[email-masked]>
Date: Mon, 30 Mar 2015 06:23:47 -0700

On 3/30/15, 1:40 AM, [email-masked] wrote:
> From: Scott Feldman <[email-masked]>
>
> New attr-based bridge_setlink can recurse lower devs and recover on err, so
> remove old wrapper.  Also, restore br_setlink back to original and don't call
> into SELF port driver.  rtnetlink.c:bridge_setlink already does a call into
> port driver for SELF.
>
> Signed-off-by: Scott Feldman <[email-masked]>
removing this now requires every vlan add to be a two step process, why ?

bridge vlan add dev swp1 vid 10
bridge vlan add dev swp1 vid 10 self

and userspace will get two notifications.

> ---
>   include/net/switchdev.h   |   18 ---------------
>   net/bridge/br_netlink.c   |   12 +---------
>   net/switchdev/switchdev.c |   55 ---------------------------------------------
>   3 files changed, 1 insertion(+), 84 deletions(-)
>
> diff --git a/include/net/switchdev.h b/include/net/switchdev.h
> index bf66bcd..bad2ec7 100644
> --- a/include/net/switchdev.h
> +++ b/include/net/switchdev.h
> @@ -92,14 +92,10 @@ int register_netdev_switch_notifier(struct notifier_block *nb);
>   int unregister_netdev_switch_notifier(struct notifier_block *nb);
>   int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
>   				 struct netdev_switch_notifier_info *info);
> -int netdev_switch_port_bridge_setlink(struct net_device *dev,
> -				struct nlmsghdr *nlh, u16 flags);
>   int netdev_switch_port_bridge_dellink(struct net_device *dev,
>   				struct nlmsghdr *nlh, u16 flags);
>   int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
>   					       struct nlmsghdr *nlh, u16 flags);
> -int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
> -					       struct nlmsghdr *nlh, u16 flags);
>   int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
>   			       u8 tos, u8 type, u32 nlflags, u32 tb_id);
>   int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
> @@ -142,13 +138,6 @@ static inline int call_netdev_switch_notifiers(unsigned long val, struct net_dev
>   	return NOTIFY_DONE;
>   }
>   
> -static inline int netdev_switch_port_bridge_setlink(struct net_device *dev,
> -						    struct nlmsghdr *nlh,
> -						    u16 flags)
> -{
> -	return -EOPNOTSUPP;
> -}
> -
>   static inline int netdev_switch_port_bridge_dellink(struct net_device *dev,
>   						    struct nlmsghdr *nlh,
>   						    u16 flags)
> @@ -163,13 +152,6 @@ static inline int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *
>   	return 0;
>   }
>   
> -static inline int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
> -							struct nlmsghdr *nlh,
> -							u16 flags)
> -{
> -	return 0;
> -}
> -
>   static inline int netdev_switch_fib_ipv4_add(u32 dst, int dst_len,
>   					     struct fib_info *fi,
>   					     u8 tos, u8 type,
> diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
> index e1115a2..5deb063 100644
> --- a/net/bridge/br_netlink.c
> +++ b/net/bridge/br_netlink.c
> @@ -586,7 +586,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
>   	struct nlattr *afspec;
>   	struct net_bridge_port *p;
>   	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
> -	int err = 0, ret_offload = 0;
> +	int err = 0;
>   
>   	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
>   	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
> @@ -628,16 +628,6 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
>   				afspec, RTM_SETLINK);
>   	}
>   
> -	if (p && !(flags & BRIDGE_FLAGS_SELF)) {
> -		/* set bridge attributes in hardware if supported
> -		 */
> -		ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
> -								flags);
> -		if (ret_offload && ret_offload != -EOPNOTSUPP)
> -			br_warn(p->br, "error setting attrs on port %u(%s)\n",
> -				(unsigned int)p->port_no, p->dev->name);
> -	}
> -
>   	if (err == 0)
>   		br_ifinfo_notify(RTM_NEWLINK, p);
>   out:
> diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
> index f3f457e..0307a45 100644
> --- a/net/switchdev/switchdev.c
> +++ b/net/switchdev/switchdev.c
> @@ -173,31 +173,6 @@ int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
>   }
>   EXPORT_SYMBOL_GPL(call_netdev_switch_notifiers);
>   
> -/**
> - *	netdev_switch_port_bridge_setlink - Notify switch device port of bridge
> - *	port attributes
> - *
> - *	@dev: port device
> - *	@nlh: netlink msg with bridge port attributes
> - *	@flags: bridge setlink flags
> - *
> - *	Notify switch device port of bridge port attributes
> - */
> -int netdev_switch_port_bridge_setlink(struct net_device *dev,
> -				      struct nlmsghdr *nlh, u16 flags)
> -{
> -	const struct net_device_ops *ops = dev->netdev_ops;
> -
> -	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
> -		return 0;
> -
> -	if (!ops->ndo_bridge_setlink)
> -		return -EOPNOTSUPP;
> -
> -	return ops->ndo_bridge_setlink(dev, nlh, flags);
> -}
> -EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_setlink);
> -
>   static int swdev_port_bridge_setflag(struct net_device *dev,
>   				     struct nlattr *ifla,
>   				     unsigned long brport_flag)
> @@ -309,36 +284,6 @@ int netdev_switch_port_bridge_dellink(struct net_device *dev,
>   EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_dellink);
>   
>   /**
> - *	ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink
> - *						     op for master devices
> - *
> - *	@dev: port device
> - *	@nlh: netlink msg with bridge port attributes
> - *	@flags: bridge setlink flags
> - *
> - *	Notify master device slaves of bridge port attributes
> - */
> -int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
> -					       struct nlmsghdr *nlh, u16 flags)
> -{
> -	struct net_device *lower_dev;
> -	struct list_head *iter;
> -	int ret = 0, err = 0;
> -
> -	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
> -		return ret;
> -
> -	netdev_for_each_lower_dev(dev, lower_dev, iter) {
> -		err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags);
> -		if (err && err != -EOPNOTSUPP)
> -			ret = err;
> -	}
> -
> -	return ret;
> -}
> -EXPORT_SYMBOL_GPL(ndo_dflt_netdev_switch_port_bridge_setlink);
> -
> -/**
>    *	ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink
>    *						     op for master devices
>    *