diff options
Diffstat (limited to 'net/bridge/br_switchdev.c')
| -rw-r--r-- | net/bridge/br_switchdev.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c new file mode 100644 index 000000000..3c42095fa --- /dev/null +++ b/net/bridge/br_switchdev.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/rtnetlink.h> +#include <linux/skbuff.h> +#include <net/switchdev.h> + +#include "br_private.h" + +static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) +{ + struct net_bridge_port *p; + + /* dev is yet to be added to the port list. */ + list_for_each_entry(p, &br->port_list, list) { + if (netdev_port_same_parent_id(dev, p->dev)) + return p->offload_fwd_mark; + } + + return ++br->offload_fwd_mark; +} + +int nbp_switchdev_mark_set(struct net_bridge_port *p) +{ + struct netdev_phys_item_id ppid = { }; + int err; + + ASSERT_RTNL(); + + err = dev_get_port_parent_id(p->dev, &ppid, true); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + + p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); + + return 0; +} + +void nbp_switchdev_frame_mark(const struct net_bridge_port *p, + struct sk_buff *skb) +{ + if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) + BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; +} + +bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, + const struct sk_buff *skb) +{ + return !skb->offload_fwd_mark || + BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; +} + +/* Flags that can be offloaded to hardware */ +#define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ + BR_MCAST_FLOOD | BR_BCAST_FLOOD) + +int br_switchdev_set_port_flag(struct net_bridge_port *p, + unsigned long flags, + unsigned long mask) +{ + struct switchdev_attr attr = { + .orig_dev = p->dev, + .id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS, + .u.brport_flags = mask, + }; + struct switchdev_notifier_port_attr_info info = { + .attr = &attr, + }; + int err; + + if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) + return 0; + + /* We run from atomic context here */ + err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, + &info.info, NULL); + err = notifier_to_errno(err); + if (err == -EOPNOTSUPP) + return 0; + + if (err) { + br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", + (unsigned int)p->port_no, p->dev->name); + return -EOPNOTSUPP; + } + + attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; + attr.flags = SWITCHDEV_F_DEFER; + attr.u.brport_flags = flags; + + err = switchdev_port_attr_set(p->dev, &attr); + if (err) { + br_warn(p->br, "error setting offload flag on port %u(%s)\n", + (unsigned int)p->port_no, p->dev->name); + return err; + } + + return 0; +} + +static void +br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, + u16 vid, struct net_device *dev, + bool added_by_user, bool offloaded) +{ + struct switchdev_notifier_fdb_info info; + unsigned long notifier_type; + + info.addr = mac; + info.vid = vid; + info.added_by_user = added_by_user; + info.offloaded = offloaded; + notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; + call_switchdev_notifiers(notifier_type, dev, &info.info, NULL); +} + +void +br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) +{ + if (!fdb->dst) + return; + if (test_bit(BR_FDB_LOCAL, &fdb->flags)) + return; + + switch (type) { + case RTM_DELNEIGH: + br_switchdev_fdb_call_notifiers(false, fdb->key.addr.addr, + fdb->key.vlan_id, + fdb->dst->dev, + test_bit(BR_FDB_ADDED_BY_USER, + &fdb->flags), + test_bit(BR_FDB_OFFLOADED, + &fdb->flags)); + break; + case RTM_NEWNEIGH: + br_switchdev_fdb_call_notifiers(true, fdb->key.addr.addr, + fdb->key.vlan_id, + fdb->dst->dev, + test_bit(BR_FDB_ADDED_BY_USER, + &fdb->flags), + test_bit(BR_FDB_OFFLOADED, + &fdb->flags)); + break; + } +} + +int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, + struct netlink_ext_ack *extack) +{ + struct switchdev_obj_port_vlan v = { + .obj.orig_dev = dev, + .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, + .flags = flags, + .vid_begin = vid, + .vid_end = vid, + }; + + return switchdev_port_obj_add(dev, &v.obj, extack); +} + +int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) +{ + struct switchdev_obj_port_vlan v = { + .obj.orig_dev = dev, + .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, + .vid_begin = vid, + .vid_end = vid, + }; + + return switchdev_port_obj_del(dev, &v.obj); +} |