Hi, When sending raw ethernet frames over an AF_PACKET/SOCK_RAW socket, "ss" always reports a empty send queue, even when it is obviously full of packets.
The root cause is that packet_snd() never updates sk->sk_wmem_alloc, which is the counter used by "ss" for the send queue occupation. All other socket types end up calling something like: refcount_add(SOME_SIZE, &sk->sk_wmem_alloc) Unfortunately, the way it is done is extremely varied across socket families, so it is not immediately obvious to a newbie where to add this increment, and associated decrement on skb free. I'd appreciate any insight on (1) perhaps why it is deemed unimportant to do send queue accounting for AF_PACKET; and (2) if it is just a bug, where the incr/decr should take place. Additionally, an explanation of "tpacket_snd()" vs "packet_snd()" would be very welcome, as the former does proper send queue accounting, while the latter doesn't. Thanks in advance, -Alex _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
