Eric Dumazet 21b29e74ff tcp: take care of zero tp->window_clamp in tcp_set_rcvlowat() ... Some applications (like selftests/net/tcp_mmap.c) call SO_RCVLOWAT on their listener, before accept(). This has an unfortunate effect on wscale selection in tcp_select_initial_window() during 3WHS. For instance, tcp_mmap was negotiating wscale 4, regardless of tcp_rmem[2] and sysctl_rmem_max. Do not change tp->window_clamp if it is zero or bigger than our computed value. Zero value is special, it allows tcp_select_initial_window() to enable autotuning. Note that SO_RCVLOWAT use on listener is probably not wise, because tp->scaling_ratio has a default value, possibly wrong. Fixes: d1361840f8 ("tcp: fix SO_RCVLOWAT and RCVBUF autotuning") Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Reviewed-by: Neal Cardwell <ncardwell@google.com> Link: https://patch.msgid.link/20251003184119.2526655-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2025-10-06 13:08:48 -07:00
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netfilter	netfilter: nf_reject: don't reply to icmp error messages	2025-09-11 15:40:55 +02:00
Kconfig	…
Makefile	…
af_inet.c	net: gro: remove unnecessary df checks	2025-09-25 12:42:49 +02:00
ah4.c	…
arp.c	net: set net.core.rmem_max and net.core.wmem_max to 4 MB	2025-08-20 19:35:00 -07:00
bpf_tcp_ca.c	…
cipso_ipv4.c	ipv4: icmp: Pass IPv4 control block structure as an argument to __icmp_send()	2025-09-11 12:22:38 +02:00
datagram.c	…
devinet.c	ipv4: Fix NULL vs error pointer check in inet_blackhole_dev_init()	2025-09-03 16:58:44 -07:00
esp4.c	tcp: Don't pass hashinfo to socket lookup helpers.	2025-08-25 17:53:35 -07:00
esp4_offload.c	…
fib_frontend.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
fib_lookup.h	…
fib_notifier.c	…
fib_rules.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
fib_semantics.c	…
fib_trie.c	…
fou_bpf.c	…
fou_core.c	net: gro: remove is_ipv6 from napi_gro_cb	2025-09-25 12:42:49 +02:00
fou_nl.c	netlink: specs: fou: change local-v6/peer-v6 check	2025-09-03 15:16:49 -07:00
fou_nl.h	…
gre_demux.c	…
gre_offload.c	…
icmp.c	ipv4: icmp: Fix source IP derivation in presence of VRFs	2025-09-11 12:22:38 +02:00
igmp.c	…
igmp_internal.h	…
inet_connection_sock.c	tcp: Update bind bucket state on port release	2025-09-23 10:12:15 +02:00
inet_diag.c	inet_diag: avoid cache line misses in inet_diag_bc_sk()	2025-08-29 19:29:24 -07:00
inet_fragment.c	net: replace use of system_wq with system_percpu_wq	2025-09-22 17:40:30 -07:00
inet_hashtables.c	tcp: Update bind bucket state on port release	2025-09-23 10:12:15 +02:00
inet_timewait_sock.c	Networking changes for 6.18.	2025-10-02 15:17:01 -07:00
inetpeer.c	…
ip_forward.c	…
ip_fragment.c	ipv4: start using dst_dev_rcu()	2025-08-29 19:36:32 -07:00
ip_gre.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
ip_input.c	net: ipv4: convert ip_rcv_options to drop reasons	2025-09-19 17:35:52 -07:00
ip_options.c	net: Switch to skb_dstref_steal/skb_dstref_restore for ip_route_input callers	2025-08-19 17:54:35 -07:00
ip_output.c	net: psp: don't assume reply skbs will have a socket	2025-10-03 10:23:50 -07:00
ip_sockglue.c	…
ip_tunnel.c	…
ip_tunnel_core.c	tunnels: reset the GSO metadata before reusing the skb	2025-09-09 13:03:33 +02:00
ip_vti.c	…
ipcomp.c	…
ipconfig.c	…
ipip.c	…
ipmr.c	ipv4: start using dst_dev_rcu()	2025-08-29 19:36:32 -07:00
ipmr_base.c	…
metrics.c	…
netfilter.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
netlink.c	…
nexthop.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2025-09-25 11:00:59 -07:00
ping.c	inet: ping: use EXPORT_IPV6_MOD[_GPL]()	2025-09-01 13:15:14 -07:00
proc.c	ipv4: snmp: do not use SNMP_MIB_SENTINEL anymore	2025-09-08 18:06:20 -07:00
protocol.c	…
raw.c	inet: raw: add drop_counters to raw sockets	2025-08-28 13:14:50 +02:00
raw_diag.c	inet_diag: change inet_diag_bc_sk() first argument	2025-08-29 19:29:24 -07:00
route.c	ipv4: icmp: Pass IPv4 control block structure as an argument to __icmp_send()	2025-09-11 12:22:38 +02:00
syncookies.c	tcp: accecn: AccECN negotiation	2025-09-18 08:47:51 +02:00
sysctl_net_ipv4.c	tcp: accecn: AccECN option send control	2025-09-18 08:47:52 +02:00
tcp.c	tcp: take care of zero tp->window_clamp in tcp_set_rcvlowat()	2025-10-06 13:08:48 -07:00
tcp_ao.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2025-09-18 11:26:06 -07:00
tcp_bbr.c	…
tcp_bic.c	…
tcp_bpf.c	tcp_bpf: Call sk_msg_free() when tcp_bpf_send_verdict() fails to allocate psock->cork.	2025-09-10 06:53:56 -07:00
tcp_cdg.c	tcp: cdg: remove redundant __GFP_NOWARN	2025-08-12 14:05:43 -07:00
tcp_cong.c	…
tcp_cubic.c	…
tcp_dctcp.c	…
tcp_dctcp.h	…
tcp_diag.c	inet_diag: change inet_diag_bc_sk() first argument	2025-08-29 19:29:24 -07:00
tcp_fastopen.c	tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()	2025-08-29 19:36:32 -07:00
tcp_highspeed.c	…
tcp_htcp.c	…
tcp_hybla.c	…
tcp_illinois.c	…
tcp_input.c	tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().	2025-10-06 11:11:20 -07:00
tcp_ipv4.c	net: psp: update the TCP MSS to reflect PSP packet overhead	2025-09-18 12:32:06 +02:00
tcp_lp.c	…
tcp_metrics.c	Networking changes for 6.18.	2025-10-02 15:17:01 -07:00
tcp_minisocks.c	tcp: add datapath logic for PSP with inline key exchange	2025-09-18 12:32:06 +02:00
tcp_nv.c	…
tcp_offload.c	net: gso: restore ids of outer ip headers correctly	2025-09-25 12:42:49 +02:00
tcp_output.c	tcp: prefer sk_skb_reason_drop()	2025-09-19 17:00:23 -07:00
tcp_plb.c	…
tcp_rate.c	…
tcp_recovery.c	…
tcp_scalable.c	…
tcp_sigpool.c	…
tcp_timer.c	tcp: annotate data-races around icsk->icsk_probes_out	2025-08-25 16:20:59 -07:00
tcp_ulp.c	…
tcp_vegas.c	…
tcp_vegas.h	…
tcp_veno.c	…
tcp_westwood.c	…
tcp_yeah.c	…
tunnel4.c	…
udp.c	udp: remove busylock and add per NUMA queues	2025-09-23 16:38:39 -07:00
udp_bpf.c	…
udp_diag.c	inet_diag: change inet_diag_bc_sk() first argument	2025-08-29 19:29:24 -07:00
udp_impl.h	…
udp_offload.c	net: gro: remove is_ipv6 from napi_gro_cb	2025-09-25 12:42:49 +02:00
udp_tunnel_core.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
udp_tunnel_nic.c	udp_tunnel: use netdev_warn() instead of netdev_WARN()	2025-09-11 19:09:48 -07:00
udp_tunnel_stub.c	…
udplite.c	…
xfrm4_input.c	…
xfrm4_output.c	…
xfrm4_policy.c	ipv4: Convert ->flowi4_tos to dscp_t.	2025-08-26 17:34:31 -07:00
xfrm4_protocol.c	…
xfrm4_state.c	…
xfrm4_tunnel.c	…