From e57a34478586fe3562560ccebd655b707a5b4a56 Mon Sep 17 00:00:00 2001 From: Yan Zhai Date: Tue, 24 Oct 2023 07:26:33 -0700 Subject: ipv6: drop feature RTAX_FEATURE_ALLFRAG RTAX_FEATURE_ALLFRAG was added before the first git commit: https://www.mail-archive.com/bk-commits-head@vger.kernel.org/msg03399.html The feature would send packets to the fragmentation path if a box receives a PMTU value with less than 1280 byte. However, since commit 9d289715eb5c ("ipv6: stop sending PTB packets for MTU < 1280"), such message would be simply discarded. The feature flag is neither supported in iproute2 utility. In theory one can still manipulate it with direct netlink message, but it is not ideal because it was based on obsoleted guidance of RFC-2460 (replaced by RFC-8200). The feature would always test false at the moment, so remove related code or mark them as unused. Signed-off-by: Yan Zhai Reviewed-by: Florian Westphal Reviewed-by: Eric Dumazet Link: https://lore.kernel.org/r/d78e44dcd9968a252143ffe78460446476a472a1.1698156966.git.yan@cloudflare.com Signed-off-by: Jakub Kicinski --- net/mptcp/subflow.c | 1 - 1 file changed, 1 deletion(-) (limited to 'net/mptcp') diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 2b43577f952e..e120e9616454 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -2051,7 +2051,6 @@ void __init mptcp_subflow_init(void) subflow_v6m_specific.send_check = ipv4_specific.send_check; subflow_v6m_specific.net_header_len = ipv4_specific.net_header_len; subflow_v6m_specific.mtu_reduced = ipv4_specific.mtu_reduced; - subflow_v6m_specific.net_frag_header_len = 0; subflow_v6m_specific.rebuild_header = subflow_rebuild_header; tcpv6_prot_override = tcpv6_prot; -- cgit v1.2.3