

Create a bridge
Add interface to bridge
net_bridge
net_bridge_fdb_entry
net_bridge_port
net_device
bridge
port
device
port
device
port
device
netif_receive_skb
ptype_all
handle_bridge
ptype_base
br_handle_frame_hook
loopback or dev->br_port == NULL
br_handle_frame_hook
和桥没关系
yes
port 的状态是disabled?
no
no
src mac 正确？
yes
stp packet(bpdu)？
no
yes
yes
port的状态是learing or forwarding？
no
drop
br_stp_handle_bpdu
br_handle_frame_finish
drop
drop
to stack
to stack
yes
port 的状态是disabled?
no
update src mac database
yes
port 的状态是learning?
no
yes
port的设备是混杂模式?
no
yes
目的mac是多播地址?
no
查找mac学习表
找到了fdb?
yes
fdb是本机mac?
no
flood
to stack
br_forward
to stack: skb->dev 是bridge