1 2The "environmental" rules for authors of any new tc actions are: 3 41) If you stealeth or borroweth any packet thou shalt be branching 5from the righteous path and thou shalt cloneth. 6 7For example if your action queues a packet to be processed later, 8or intentionally branches by redirecting a packet, then you need to 9clone the packet. 10 112) If you munge any packet thou shalt call pskb_expand_head in the case 12someone else is referencing the skb. After that you "own" the skb. 13 143) Dropping packets you don't own is a no-no. You simply return 15TC_ACT_SHOT to the caller and they will drop it. 16 17The "environmental" rules for callers of actions (qdiscs etc) are: 18 19*) Thou art responsible for freeing anything returned as being 20TC_ACT_SHOT/STOLEN/QUEUED. If none of TC_ACT_SHOT/STOLEN/QUEUED is 21returned, then all is great and you don't need to do anything. 22 23Post on netdev if something is unclear. 24 25