Re: [bpf PATCH v3 2/3] bpf: sockmap, fix transition through disconnect without close

2018-09-17 Thread Y Song
On Mon, Sep 17, 2018 at 9:39 PM John Fastabend wrote: > > It is possible (via shutdown()) for TCP socks to go trough TCP_CLOSE > state via tcp_disconnect() without actually calling tcp_close which > would then call our bpf_tcp_close() callback. Because of this a user > could disconnect a socket th

[bpf PATCH v3 2/3] bpf: sockmap, fix transition through disconnect without close

2018-09-17 Thread John Fastabend
It is possible (via shutdown()) for TCP socks to go trough TCP_CLOSE state via tcp_disconnect() without actually calling tcp_close which would then call our bpf_tcp_close() callback. Because of this a user could disconnect a socket then put it in a LISTEN state which would break our assumptions abo