diff options
| -rw-r--r-- | include/net/switchdev.h | 9 | ||||
| -rw-r--r-- | net/switchdev/switchdev.c | 103 |
2 files changed, 112 insertions, 0 deletions
diff --git a/include/net/switchdev.h b/include/net/switchdev.h index d5671f118bfc..89da8934519b 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -157,6 +157,9 @@ int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, struct net_device *filter_dev, int idx); +void switchdev_port_fwd_mark_set(struct net_device *dev, + struct net_device *group_dev, + bool joining); #else @@ -271,6 +274,12 @@ static inline int switchdev_port_fdb_dump(struct sk_buff *skb, return -EOPNOTSUPP; } +static inline void switchdev_port_fwd_mark_set(struct net_device *dev, + struct net_device *group_dev, + bool joining) +{ +} + #endif #endif /* _LINUX_SWITCHDEV_H_ */ diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 4e5bba50ccff..33bafa2e703e 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -1039,3 +1039,106 @@ void switchdev_fib_ipv4_abort(struct fib_info *fi) fi->fib_net->ipv4.fib_offload_disabled = true; } EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); + +static bool switchdev_port_same_parent_id(struct net_device *a, + struct net_device *b) +{ + struct switchdev_attr a_attr = { + .id = SWITCHDEV_ATTR_PORT_PARENT_ID, + .flags = SWITCHDEV_F_NO_RECURSE, + }; + struct switchdev_attr b_attr = { + .id = SWITCHDEV_ATTR_PORT_PARENT_ID, + .flags = SWITCHDEV_F_NO_RECURSE, + }; + + if (switchdev_port_attr_get(a, &a_attr) || + switchdev_port_attr_get(b, &b_attr)) + return false; + + return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); +} + +static u32 switchdev_port_fwd_mark_get(struct net_device *dev, + struct net_device *group_dev) +{ + struct net_device *lower_dev; + struct list_head *iter; + + netdev_for_each_lower_dev(group_dev, lower_dev, iter) { + if (lower_dev == dev) + continue; + if (switchdev_port_same_parent_id(dev, lower_dev)) + return lower_dev->offload_fwd_mark; + return switchdev_port_fwd_mark_get(dev, lower_dev); + } + + return dev->ifindex; +} + +static void switchdev_port_fwd_mark_reset(struct net_device *group_dev, + u32 old_mark, u32 *reset_mark) +{ + struct net_device *lower_dev; + struct list_head *iter; + + netdev_for_each_lower_dev(group_dev, lower_dev, iter) { + if (lower_dev->offload_fwd_mark == old_mark) { + if (!*reset_mark) + *reset_mark = lower_dev->ifindex; + lower_dev->offload_fwd_mark = *reset_mark; + } + switchdev_port_fwd_mark_reset(lower_dev, old_mark, reset_mark); + } +} + +/** + * switchdev_port_fwd_mark_set - Set port offload forwarding mark + * + * @dev: port device + * @group_dev: containing device + * @joining: true if dev is joining group; false if leaving group + * + * An ungrouped port's offload mark is just its ifindex. A grouped + * port's (member of a bridge, for example) offload mark is the ifindex + * of one of the ports in the group with the same parent (switch) ID. + * Ports on the same device in the same group will have the same mark. + * + * Example: + * + * br0 ifindex=9 + * sw1p1 ifindex=2 mark=2 + * sw1p2 ifindex=3 mark=2 + * sw2p1 ifindex=4 mark=5 + * sw2p2 ifindex=5 mark=5 + * + * If sw2p2 leaves the bridge, we'll have: + * + * br0 ifindex=9 + * sw1p1 ifindex=2 mark=2 + * sw1p2 ifindex=3 mark=2 + * sw2p1 ifindex=4 mark=4 + * sw2p2 ifindex=5 mark=5 + */ +void switchdev_port_fwd_mark_set(struct net_device *dev, + struct net_device *group_dev, + bool joining) +{ + u32 mark = dev->ifindex; + u32 reset_mark = 0; + + if (group_dev && joining) { + mark = switchdev_port_fwd_mark_get(dev, group_dev); + } else if (group_dev && !joining) { + if (dev->offload_fwd_mark == mark) + /* Ohoh, this port was the mark reference port, + * but it's leaving the group, so reset the + * mark for the remaining ports in the group. + */ + switchdev_port_fwd_mark_reset(group_dev, mark, + &reset_mark); + } + + dev->offload_fwd_mark = mark; +} +EXPORT_SYMBOL_GPL(switchdev_port_fwd_mark_set); |