Re: [PATCH net-next v3 1/6] tcp: implement RFC 7323 window retraction receiver requirements
From: Stefano Brivio <hidden>
Date: 2026-03-10 08:58:13
Also in:
linux-doc, linux-kselftest, lkml, mptcp
Simon, On Mon, 09 Mar 2026 09:02:26 +0100 Simon Baatz via B4 Relay [off-list ref] wrote:
quoted hunk ↗ jump to hunk
[...]diff --git a/include/linux/tcp.h b/include/linux/tcp.h index f72eef31fa23cc584f2f0cefacdc35cae43aa52d..73aa2e0ccd1d7a6314a00c27950b019b62a3851c 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h@@ -316,6 +316,9 @@ struct tcp_sock { */ u32 app_limited; /* limited until "delivered" reaches this val */ u32 rcv_wnd; /* Current receiver window */ + u32 rcv_mwnd_seq; /* Maximum window sequence number (RFC 7323, + * section 2.4, receiver requirements) + */
I didn't follow the rest of the discussion but, at this point, what does this mean for applications (CRIU, passt) dumping/restoring socket data? Do they have to adapt? I couldn't find this bit of information anywhere in v3. -- Stefano