Xin Long 8aec4959d8 ip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit ... When receiving a Toobig icmpv6 packet, ip6gre_err would just set tunnel dev's mtu, that's not enough. For skb_dst(skb)'s pmtu may still be using the old value, it has no chance to be updated with tunnel dev's mtu. Jianlin found this issue by reducing route's mtu while running netperf, the performance went to 0. ip6ip6 and ip4ip6 tunnel can work well with this, as they lookup the upper dst and update_pmtu it's pmtu or icmpv6_send a Toobig to upper socket after setting tunnel dev's mtu. We couldn't do that for ip6_gre, as gre's inner packet could be any protocol, it's difficult to handle them (like lookup upper dst) in a good way. So this patch is to fix it by updating skb_dst(skb)'s pmtu when dev->mtu < skb_dst(skb)'s pmtu in tx path. It's safe to do this update there, as usually dev->mtu <= skb_dst(skb)'s pmtu and no performance regression can be caused by this. Fixes: c12b395a46 ("gre: Support GRE over IPv6") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-10-27 23:45:42 +09:00
..
ila	netfilter: nf_hook_ops structs can be const	2017-07-31 19:10:44 +02:00
netfilter	netfilter: SYNPROXY: skip non-tcp packet in {ipv4, ipv6}_synproxy_hook	2017-10-09 13:08:39 +02:00
Kconfig	ipv6: sr: add helper functions for seg6local	2017-08-25 17:10:24 -07:00
Makefile	ipv6: sr: define core operations for seg6local lightweight tunnel	2017-08-07 14:16:22 -07:00
addrconf.c	ipv6: fix net.ipv6.conf.all.accept_dad behaviour for real	2017-10-07 23:10:05 +01:00
addrconf_core.c	Ipvlan should return an error when an address is already in use.	2017-06-09 12:26:07 -04:00
addrlabel.c	addrlabel: add/delete/get can run without rtnl	2017-08-29 09:41:56 -07:00
af_inet6.c	ipv6: Add sysctl for per namespace flow label reflection	2017-08-24 18:05:43 -07:00
ah6.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2017-06-23 14:17:31 -04:00
anycast.c	net, ipv6: convert ifacaddr6.aca_refcnt from atomic_t to refcount_t	2017-07-04 01:29:04 -07:00
calipso.c	net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t	2017-07-04 22:35:16 +01:00
datagram.c	net: convert sock.sk_refcnt from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
esp6.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-09-01 17:42:05 -07:00
esp6_offload.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-09-01 17:42:05 -07:00
exthdrs.c	ipv6: sr: allow SRH insertion with arbitrary segments_left value	2017-08-07 14:16:21 -07:00
exthdrs_core.c	ipv6: constify the skb pointer of ipv6_find_tlv().	2016-06-27 15:06:15 -04:00
exthdrs_offload.c	ipv6: fix exthdrs offload registration in out_rt path	2015-09-02 15:31:00 -07:00
fib6_notifier.c	net: Add module reference to FIB notifiers	2017-09-01 20:33:42 -07:00
fib6_rules.c	net: ipv6: avoid overhead when no custom FIB rules are installed	2017-08-08 21:40:08 -07:00
fou6.c	fou: make local function static	2017-05-21 13:42:36 -04:00
icmp.c	ipv6: Use rt6i_idev index for echo replies to a local address	2017-08-29 15:32:25 -07:00
inet6_connection_sock.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-01-28 10:33:06 -05:00
inet6_hashtables.c	net: ipv6: add second dif to inet6 socket lookups	2017-08-07 11:39:22 -07:00
ip6_checksum.c	ipv6: fix checksum annotation in udp6_csum_init	2016-06-14 15:26:42 -04:00
ip6_fib.c	ipv6: fix typo in fib6_net_exit()	2017-09-08 16:09:04 -07:00
ip6_flowlabel.c	ipv6: flowlabel: do not leave opt->tot_len with garbage	2017-10-22 03:22:24 +01:00
ip6_gre.c	ip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit	2017-10-27 23:45:42 +09:00
ip6_icmp.c	ipv6: icmp: add a force_saddr param to icmp6_send()	2016-06-18 22:11:38 -07:00
ip6_input.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-04-20 10:35:33 -04:00
ip6_offload.c	gso: fix payload length when gso_size is zero	2017-10-08 10:12:15 -07:00
ip6_offload.h	udp: Add GRO functions to UDP socket	2016-04-07 16:53:29 -04:00
ip6_output.c	ipv6: flowlabel: do not leave opt->tot_len with garbage	2017-10-22 03:22:24 +01:00
ip6_tunnel.c	ip6_tunnel: update mtu properly for ARPHRD_ETHER tunnel device in tx path	2017-10-01 03:46:42 +01:00
ip6_udp_tunnel.c	ip6_udp_tunnel: remove unused IPCB related codes	2016-11-02 15:18:36 -04:00
ip6_vti.c	vti: fix use after free in vti_tunnel_xmit/vti6_tnl_xmit	2017-09-26 09:58:21 -07:00
ip6mr.c	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
ipcomp6.c	net: inet: Support UID-based routing in IP protocols.	2016-11-04 14:45:23 -04:00
ipv6_sockglue.c	ipv6: do not set sk_destruct in IPV6_ADDRFORM sockopt	2017-08-29 10:54:40 -07:00
mcast.c	net, ipv6: convert ifmcaddr6.mca_refcnt from atomic_t to refcount_t	2017-07-04 01:29:04 -07:00
mcast_snoop.c	net: fix wrong skb_get() usage / crash in IGMP/MLD parsing code	2015-08-13 17:08:39 -07:00
mip6.c	ktime: Get rid of ktime_equal()	2016-12-25 17:21:23 +01:00
ndisc.c	neigh: increase queue_len_bytes to match wmem_default	2017-08-29 16:10:50 -07:00
netfilter.c	net: inet: Support UID-based routing in IP protocols.	2016-11-04 14:45:23 -04:00
output_core.c	ipv6: accept 64k - 1 packet length in ip6_find_1stfragopt()	2017-08-22 10:23:26 -07:00
ping.c	net: ping: do not abuse udp_poll()	2017-06-04 22:56:55 -04:00
proc.c	proc: snmp6: Use correct type in memset	2017-06-12 09:53:14 -04:00
protocol.c	net: Add sysctl to toggle early demux for tcp and udp	2017-03-24 13:17:07 -07:00
raw.c	net: ipv6: add second dif to raw socket lookups	2017-08-07 11:39:22 -07:00
reassembly.c	Revert "net: fix percpu memory leaks"	2017-09-03 11:01:05 -07:00
route.c	ipv6: Fix traffic triggered IPsec connections.	2017-10-09 09:39:26 -07:00
seg6.c	ipv6: sr: define core operations for seg6local lightweight tunnel	2017-08-07 14:16:22 -07:00
seg6_hmac.c	ipv6: sr: Use ARRAY_SIZE macro	2017-09-01 18:35:23 -07:00
seg6_iptunnel.c	ipv6: sr: add support for encapsulation of L2 frames	2017-08-25 17:10:23 -07:00
seg6_local.c	ipv6: sr: remove duplicate routing header type check	2017-09-11 14:34:10 -07:00
sit.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-06-30 12:43:08 -04:00
syncookies.c	ipv4: ipv6: initialize treq->txhash in cookie_v[46]_check()	2017-07-18 11:22:51 -07:00
sysctl_net_ipv6.c	ipv6: Add sysctl for per namespace flow label reflection	2017-08-24 18:05:43 -07:00
tcp_ipv6.c	tcp: fix a request socket leak	2017-09-08 16:07:17 -07:00
tcpv6_offload.c	tcp: cleanup static functions	2015-02-28 16:56:51 -05:00
tunnel6.c	ipv6: fix tunnel error handling	2015-11-03 10:52:13 -05:00
udp.c	udpv6: Fix the checksum computation when HW checksum does not apply	2017-09-18 11:43:03 -07:00
udp_impl.h	udp: make *udp*_queue_rcv_skb() functions static	2017-05-18 10:23:33 -04:00
udp_offload.c	net: avoid skb_warn_bad_offload false positives on UFO	2017-08-08 21:39:01 -07:00
udplite.c	udplite: call proper backlog handlers	2016-11-24 15:32:14 -05:00
xfrm6_input.c	xfrm6: Fix CHECKSUM_COMPLETE after IPv6 header push	2017-08-02 11:00:15 +02:00
xfrm6_mode_beet.c	networking: make skb_pull & friends return void pointers	2017-06-16 11:48:39 -04:00
xfrm6_mode_ro.c	ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()	2017-06-02 13:57:27 -04:00
xfrm6_mode_transport.c	ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()	2017-06-02 13:57:27 -04:00
xfrm6_mode_tunnel.c	xfrm: Add encapsulation header offsets while SKB is not encrypted	2017-04-14 10:07:39 +02:00
xfrm6_output.c	xfrm: Add an IPsec hardware offloading API	2017-04-14 10:06:10 +02:00
xfrm6_policy.c	net: xfrm: support setting an output mark.	2017-08-11 07:03:00 +02:00
xfrm6_protocol.c	xfrm: input: constify xfrm_input_afinfo	2017-02-09 10:22:17 +01:00
xfrm6_state.c	ipv6: White-space cleansing : Line Layouts	2014-08-24 22:37:52 -07:00
xfrm6_tunnel.c	net, ipv6: convert xfrm6_tunnel_spi.refcnt from atomic_t to refcount_t	2017-07-04 01:29:04 -07:00