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 <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 3d4d99a..b01791a 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>
@@ -357,28 +358,156 @@
}
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);