kernel_optimize_test/net/ipv4
Vadim Fedorenko 4476568069 net: lwtunnel: handle MTU calculation in forwading
[ Upstream commit fade56410c22cacafb1be9f911a0afd3701d8366 ]

Commit 14972cbd34 ("net: lwtunnel: Handle fragmentation") moved
fragmentation logic away from lwtunnel by carry encap headroom and
use it in output MTU calculation. But the forwarding part was not
covered and created difference in MTU for output and forwarding and
further to silent drops on ipv4 forwarding path. Fix it by taking
into account lwtunnel encap headroom.

The same commit also introduced difference in how to treat RTAX_MTU
in IPv4 and IPv6 where latter explicitly removes lwtunnel encap
headroom from route MTU. Make IPv4 version do the same.

Fixes: 14972cbd34 ("net: lwtunnel: Handle fragmentation")
Suggested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-14 16:56:32 +02:00
..
bpfilter
netfilter netfilter: arp_tables: add pre_exit hook for table unregister 2021-04-21 13:00:56 +02:00
af_inet.c inet: annotate data race in inet_send_prepare() and inet_dgram_connect() 2021-06-30 08:47:20 -04:00
ah4.c xfrm: Use actual socket sk instead of skb socket for xfrm_output_resume 2021-04-14 08:42:05 +02:00
arp.c net: Exempt multicast addresses from five-second neighbor lifetime 2020-11-13 14:24:39 -08:00
bpf_tcp_ca.c bpf: Change bpf_sk_storage_*() to accept ARG_PTR_TO_BTF_ID_SOCK_COMMON 2020-09-25 13:58:01 -07:00
cipso_ipv4.c net: ipv4: fix memory leak in netlbl_cipsov4_add_std 2021-06-23 14:42:41 +02:00
datagram.c
devinet.c net: ipv4: Remove unneed BUG() function 2021-06-30 08:47:20 -04:00
esp4_offload.c xfrm: Provide private skb extensions for segmented and hw offloaded ESP packets 2021-04-14 08:42:07 +02:00
esp4.c xfrm: xfrm_state_mtu should return at least 1280 for ipv6 2021-07-14 16:56:14 +02:00
fib_frontend.c net/ipv4: swap flow ports when validating source 2021-07-14 16:56:25 +02:00
fib_lookup.h
fib_notifier.c
fib_rules.c
fib_semantics.c
fib_trie.c
fou.c genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
gre_demux.c erspan: fix version 1 check in gre_parse_header() 2021-01-12 20:18:12 +01:00
gre_offload.c
icmp.c icmp: don't send out ICMP messages with a source address of 0.0.0.0 2021-06-23 14:42:47 +02:00
igmp.c net: ipv4: fix memory leak in ip_mc_add1_src 2021-06-23 14:42:46 +02:00
inet_connection_sock.c tcp: relookup sock for RST+ACK packets handled by obsolete req sock 2021-03-30 14:31:59 +02:00
inet_diag.c inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill() 2020-11-17 16:08:36 -08:00
inet_fragment.c
inet_hashtables.c tcp: fix race condition when creating child sockets from syncookies 2020-11-23 16:32:33 -08:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c
ip_fragment.c
ip_gre.c ip_gre: set dev->hard_header_len and dev->needed_headroom properly 2020-10-13 18:35:29 -07:00
ip_input.c
ip_options.c
ip_output.c net: ip: always refragment ip defragmented packets 2021-01-17 14:16:56 +01:00
ip_sockglue.c
ip_tunnel_core.c tunnels: Fix off-by-one in lower MTU bounds for ICMP/ICMPv6 replies 2020-11-09 15:39:39 -08:00
ip_tunnel.c net: always use icmp{,v6}_ndo_send from ndo_start_xmit 2021-03-17 17:06:12 +01:00
ip_vti.c net: always use icmp{,v6}_ndo_send from ndo_start_xmit 2021-03-17 17:06:12 +01:00
ipcomp.c
ipconfig.c net: ipconfig: Don't override command-line hostnames or domains 2021-06-18 10:00:05 +02:00
ipip.c
ipmr_base.c
ipmr.c ipmr: Use full VIF ID in netlink cache reports 2020-09-10 12:25:51 -07:00
Kconfig
Makefile
metrics.c
netfilter.c netfilter: use actual socket sk rather than skb sk when routing harder 2020-10-30 12:57:39 +01:00
netlink.c
nexthop.c nexthop: Do not flush blackhole nexthops when loopback goes down 2021-03-17 17:06:14 +01:00
ping.c ping: Check return value of function 'ping_queue_rcv_skb' 2021-06-30 08:47:20 -04:00
proc.c tcp: skip DSACKs with dubious sequence ranges 2020-09-24 20:15:45 -07:00
protocol.c
raw_diag.c
raw.c networking changes for the 5.10 merge window 2020-10-15 18:42:13 -07:00
route.c net: lwtunnel: handle MTU calculation in forwading 2021-07-14 16:56:32 +02:00
syncookies.c net: Update window_clamp if SOCK_RCVBUF is set 2020-11-10 17:42:35 -08:00
sysctl_net_ipv4.c net: Make tcp_allowed_congestion_control readonly in non-init netns 2021-04-21 13:00:57 +02:00
tcp_bbr.c tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate 2020-11-17 11:03:22 -08:00
tcp_bic.c
tcp_bpf.c bpf, sockmap: Ensure SO_RCVBUF memory is observed on ingress redirect 2020-11-18 00:12:34 +01:00
tcp_cdg.c
tcp_cong.c net: Only allow init netns to set default tcp cong to a restricted algo 2021-05-14 09:50:46 +02:00
tcp_cubic.c
tcp_dctcp.c
tcp_dctcp.h
tcp_diag.c
tcp_fastopen.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-02-03 23:28:52 +01:00
tcp_ipv4.c tcp: Fix potential use-after-free due to double kfree() 2021-01-27 11:55:28 +01:00
tcp_lp.c
tcp_metrics.c genetlink: move to smaller ops wherever possible 2020-10-02 19:11:11 -07:00
tcp_minisocks.c tcp: relookup sock for RST+ACK packets handled by obsolete req sock 2021-03-30 14:31:59 +02:00
tcp_nv.c
tcp_offload.c
tcp_output.c tcp: make TCP_USER_TIMEOUT accurate for zero window probes 2021-02-03 23:28:51 +01:00
tcp_rate.c
tcp_recovery.c tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN 2021-02-03 23:28:52 +01:00
tcp_scalable.c
tcp_timer.c tcp: make TCP_USER_TIMEOUT accurate for zero window probes 2021-02-03 23:28:51 +01:00
tcp_ulp.c
tcp_vegas.c tcp: use semicolons rather than commas to separate statements 2020-10-13 17:11:52 -07:00
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c tcp: add sanity tests to TCP_QUEUE_SEQ 2021-03-17 17:06:11 +01:00
tunnel4.c
udp_bpf.c
udp_diag.c
udp_impl.h
udp_offload.c net: Fix gro aggregation for udp encaps with zero csum 2021-03-17 17:06:11 +01:00
udp_tunnel_core.c
udp_tunnel_nic.c udp_tunnel: add the ability to share port tables 2020-09-28 12:50:12 -07:00
udp_tunnel_stub.c
udp.c udp: fix race between close() and udp_abort() 2021-06-23 14:42:42 +02:00
udplite.c
xfrm4_input.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c xfrm: interface: fix the priorities for ipip and ipv6 tunnels 2020-10-09 12:29:48 +02:00