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Date: Mon, 13 Apr 2015 22:46:46 -0700
From: roopa <roopa@...ulusnetworks.com>
To: sfeldma@...il.com
CC: netdev@...r.kernel.org, jiri@...nulli.us, linux@...ck-us.net,
f.fainelli@...il.com, sridhar.samudrala@...el.com,
ronen.arad@...el.com, andrew@...n.ch
Subject: Re: [PATCH net-next v4 09/24] switchdev: add new swdev bridge setlink
On 4/12/15, 11:17 PM, sfeldma@...il.com wrote:
> From: Scott Feldman <sfeldma@...il.com>
>
> Add new swdev_port_bridge_setlink that can be used by drivers implementing
> .ndo_bridge_setlink to set swdev bridge attributes. Basically turn the raw
> rtnl_bridge_setlink netlink into swdev attr sets. Proper netlink attr policy
> checking is done on the protinfo part of the netlink msg.
>
> Currently, for protinfo, only bridge port attrs BR_LEARNING and
> BR_LEARNING_SYNC are parsed and passed to port driver.
>
> For afspec, VLAN objs are passed so swdev driver can set VLANs assigned to
> SELF. To illustrate with iproute2 cmd, we have:
>
> bridge vlan add vid 10 dev sw1p1 self master
>
> To add VLAN 10 to port sw1p1 for both the bridge (master) and the device
> (self).
This results in vlan sets/dels/notification code duplicated in both
bridge and switchdev layer.
>
> Signed-off-by: Scott Feldman <sfeldma@...il.com>
> ---
> include/net/switchdev.h | 8 +++
> net/switchdev/switchdev.c | 152 +++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 160 insertions(+)
>
> diff --git a/include/net/switchdev.h b/include/net/switchdev.h
> index d3cc8eb..cff53ae 100644
> --- a/include/net/switchdev.h
> +++ b/include/net/switchdev.h
> @@ -121,6 +121,8 @@ int swdev_port_attr_get(struct net_device *dev, struct swdev_attr *attr);
> int swdev_port_attr_set(struct net_device *dev, struct swdev_attr *attr);
> int swdev_port_obj_add(struct net_device *dev, struct swdev_obj *obj);
> int swdev_port_obj_del(struct net_device *dev, struct swdev_obj *obj);
> +int swdev_port_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
> + u16 flags);
> 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,
> @@ -165,6 +167,12 @@ static inline int swdev_port_obj_del(struct net_device *dev,
> return -EOPNOTSUPP;
> }
>
> +static inline int swdev_port_bridge_setlink(struct net_device *dev,
> + struct nlmsghdr *nlh, u16 flags)
> +{
> + return -EOPNOTSUPP;
> +}
> +
> static inline int register_netdev_switch_notifier(struct notifier_block *nb)
> {
> return 0;
> diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
> index 05fded9..31d55e7 100644
> --- a/net/switchdev/switchdev.c
> +++ b/net/switchdev/switchdev.c
> @@ -15,6 +15,7 @@
> #include <linux/mutex.h>
> #include <linux/notifier.h>
> #include <linux/netdevice.h>
> +#include <linux/if_bridge.h>
> #include <net/ip_fib.h>
> #include <net/switchdev.h>
>
> @@ -395,6 +396,157 @@ int netdev_switch_port_bridge_setlink(struct net_device *dev,
> }
> EXPORT_SYMBOL_GPL(netdev_switch_port_bridge_setlink);
>
> +static int swdev_port_br_setflag(struct net_device *dev, struct nlattr *nlattr,
> + unsigned long brport_flag)
> +{
> + struct swdev_attr attr = {
> + .id = SWDEV_ATTR_PORT_BRIDGE_FLAGS,
> + };
> + u8 flag = nla_get_u8(nlattr);
> + int err;
> +
> + err = swdev_port_attr_get(dev, &attr);
> + if (err)
> + return err;
> +
> + if (flag)
> + attr.brport_flags |= brport_flag;
> + else
> + attr.brport_flags &= ~brport_flag;
> +
> + return swdev_port_attr_set(dev, &attr);
> +}
> +
> +static const struct nla_policy swdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = {
> + [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
> + [IFLA_BRPORT_COST] = { .type = NLA_U32 },
> + [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
> + [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
> + [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
> + [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
> + [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 },
> + [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
> + [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 },
> + [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
> +};
> +
> +static int swdev_port_br_setlink_protinfo(struct net_device *dev,
> + struct nlattr *protinfo)
> +{
> + struct nlattr *attr;
> + int rem;
> + int err;
> +
> + err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX,
> + swdev_port_bridge_policy);
> + if (err)
> + return err;
> +
> + nla_for_each_nested(attr, protinfo, rem) {
> + switch (nla_type(attr)) {
> + case IFLA_BRPORT_LEARNING:
> + err = swdev_port_br_setflag(dev, attr,
> + BR_LEARNING);
> + break;
> + case IFLA_BRPORT_LEARNING_SYNC:
> + err = swdev_port_br_setflag(dev, attr,
> + BR_LEARNING_SYNC);
> + break;
> + default:
> + err = -EOPNOTSUPP;
> + break;
> + }
> + if (err)
> + return err;
> + }
> +
> + return 0;
> +}
> +
> +static int swdev_port_br_afspec(struct net_device *dev,
> + struct nlattr *afspec,
> + int (*f)(struct net_device *dev,
> + struct swdev_obj *obj))
> +{
> + struct nlattr *attr;
> + struct bridge_vlan_info *vinfo;
> + struct swdev_obj obj = {
> + .id = SWDEV_OBJ_PORT_VLAN,
> + };
> + int rem;
> + int err;
> +
> + nla_for_each_nested(attr, afspec, rem) {
> + if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
> + continue;
> + if (nla_len(attr) != sizeof(struct bridge_vlan_info))
> + return -EINVAL;
> + vinfo = nla_data(attr);
> + obj.vlan.flags = vinfo->flags;
> + if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
> + if (obj.vlan.vid_start)
> + return -EINVAL;
> + obj.vlan.vid_start = vinfo->vid;
> + } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) {
> + if (!obj.vlan.vid_start)
> + return -EINVAL;
> + obj.vlan.vid_end = vinfo->vid;
> + if (obj.vlan.vid_end <= obj.vlan.vid_start)
> + return -EINVAL;
> + err = f(dev, &obj);
> + if (err)
> + return err;
> + memset(&obj.vlan, 0, sizeof(obj.vlan));
> + } else {
> + if (obj.vlan.vid_start)
> + return -EINVAL;
> + obj.vlan.vid_start = vinfo->vid;
> + obj.vlan.vid_end = vinfo->vid;
> + err = f(dev, &obj);
> + if (err)
> + return err;
> + memset(&obj.vlan, 0, sizeof(obj.vlan));
> + }
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * swdev_port_bridge_setlink - Set bridge port attributes
> + *
> + * @dev: port device
> + * @nlh: netlink header
> + * @flags: netlink flags
> + *
> + * Called for SELF on rtnl_bridge_setlink to set bridge port
> + * attributes.
> + */
> +int swdev_port_bridge_setlink(struct net_device *dev,
> + struct nlmsghdr *nlh, u16 flags)
> +{
> + struct nlattr *protinfo;
> + struct nlattr *afspec;
> + int err = 0;
> +
> + protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
> + IFLA_PROTINFO);
> + if (protinfo) {
> + err = swdev_port_br_setlink_protinfo(dev, protinfo);
> + if (err)
> + return err;
> + }
> +
> + afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
> + IFLA_AF_SPEC);
> + if (afspec)
> + err = swdev_port_br_afspec(dev, afspec,
> + swdev_port_obj_add);
> +
> + return err;
> +}
> +EXPORT_SYMBOL_GPL(swdev_port_bridge_setlink);
> +
> /**
> * netdev_switch_port_bridge_dellink - Notify switch device port of bridge
> * port attribute delete
--
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