From 47f8328bb1a4115413e35b9b20d04b061ed544f8 Mon Sep 17 00:00:00 2001 From: Scott Feldman Date: Sun, 10 May 2015 09:47:56 -0700 Subject: [PATCH] switchdev: add new switchdev bridge setlink Add new switchdev_port_bridge_setlink that can be used by drivers implementing .ndo_bridge_setlink to set switchdev bridge attributes. Basically turn the raw rtnl_bridge_setlink netlink into switchdev 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 switchdev 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). Signed-off-by: Scott Feldman Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- net/switchdev/switchdev.c | 151 +++++++++++++++++++++++++++++++++++--- 1 file changed, 140 insertions(+), 11 deletions(-) diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 3d4d99a70b80..b01791a9b56d 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -357,28 +358,156 @@ int call_switchdev_notifiers(unsigned long val, struct net_device *dev, } EXPORT_SYMBOL_GPL(call_switchdev_notifiers); +static int switchdev_port_br_setflag(struct net_device *dev, + struct nlattr *nlattr, + unsigned long brport_flag) +{ + struct switchdev_attr attr = { + .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, + }; + u8 flag = nla_get_u8(nlattr); + int err; + + err = switchdev_port_attr_get(dev, &attr); + if (err) + return err; + + if (flag) + attr.brport_flags |= brport_flag; + else + attr.brport_flags &= ~brport_flag; + + return switchdev_port_attr_set(dev, &attr); +} + +static const struct nla_policy +switchdev_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 switchdev_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, + switchdev_port_bridge_policy); + if (err) + return err; + + nla_for_each_nested(attr, protinfo, rem) { + switch (nla_type(attr)) { + case IFLA_BRPORT_LEARNING: + err = switchdev_port_br_setflag(dev, attr, + BR_LEARNING); + break; + case IFLA_BRPORT_LEARNING_SYNC: + err = switchdev_port_br_setflag(dev, attr, + BR_LEARNING_SYNC); + break; + default: + err = -EOPNOTSUPP; + break; + } + if (err) + return err; + } + + return 0; +} + +static int switchdev_port_br_afspec(struct net_device *dev, + struct nlattr *afspec, + int (*f)(struct net_device *dev, + struct switchdev_obj *obj)) +{ + struct nlattr *attr; + struct bridge_vlan_info *vinfo; + struct switchdev_obj obj = { + .id = SWITCHDEV_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; +} + /** - * switchdev_port_bridge_setlink - Notify switch device port of bridge - * port attributes + * switchdev_port_bridge_setlink - Set bridge port attributes * * @dev: port device - * @nlh: netlink msg with bridge port attributes - * @flags: bridge setlink flags + * @nlh: netlink header + * @flags: netlink flags * - * Notify switch device port of bridge port attributes + * Called for SELF on rtnl_bridge_setlink to set bridge port + * attributes. */ int switchdev_port_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) { - const struct net_device_ops *ops = dev->netdev_ops; + struct nlattr *protinfo; + struct nlattr *afspec; + int err = 0; - if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) - return 0; + protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), + IFLA_PROTINFO); + if (protinfo) { + err = switchdev_port_br_setlink_protinfo(dev, protinfo); + if (err) + return err; + } - if (!ops->ndo_bridge_setlink) - return -EOPNOTSUPP; + afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), + IFLA_AF_SPEC); + if (afspec) + err = switchdev_port_br_afspec(dev, afspec, + switchdev_port_obj_add); - return ops->ndo_bridge_setlink(dev, nlh, flags); + return err; } EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); -- 2.20.1