Re: [bpf PATCH v2 2/3] bpf: sockmap, fix transition through disconnect without close

2018-09-17 Thread John Fastabend
On 09/17/2018 10:59 AM, 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 then put it i

[bpf PATCH v2 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