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
..
6lowpan
9p	net/9p: switch p9_fd_read to kernel_write	2017-09-04 19:05:16 -04:00
802	net: introduce __skb_put_[zero, data, u8]	2017-06-20 13:30:14 -04:00
8021q	net: 8021q: skip packets if the vlan is down	2017-10-04 18:16:48 -07:00
appletalk	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
atm	net: atm: make atmdev_ops const	2017-08-09 22:43:50 -07:00
ax25	net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t	2017-07-04 22:35:19 +01:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-08-09 16:28:45 -07:00
bluetooth	Revert "Bluetooth: Add option for disabling legacy ioctl interfaces"	2017-09-28 13:20:32 -07:00
bpf
bridge	net: bridge: fix returning of vlan range op errors	2017-10-22 01:46:32 +01:00
caif	net: convert sock.sk_wmem_alloc from atomic_t to refcount_t	2017-07-01 07:39:08 -07:00
can	can: af_can: can_pernet_init(): add missing error handling for kzalloc returning NULL	2017-10-19 13:05:54 +02:00
ceph	libceph: don't allow bidirectional swap of pg-upmap-items	2017-09-19 20:34:29 +02:00
core	net: ethtool: remove error check for legacy setting transceiver type	2017-10-22 02:14:18 +01:00
dcb	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
dccp	tcp/dccp: fix other lockdep splats accessing ireq_opt	2017-10-26 17:41:32 +09:00
decnet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2017-09-03 17:08:42 -07:00
dns_resolver	KEYS: Fix race between updating and finding a negative key	2017-10-18 09:12:40 +01:00
dsa	net: dsa: check master device before put	2017-10-25 10:49:14 +09:00
ethernet	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00
hsr	net/hsr: Check skb_put_padto() return value	2017-08-22 13:40:23 -07:00
ieee802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-09-05 20:03:35 -07:00
ife
ipv4	ipip: only increase err_count for some certain type icmp in ipip_err	2017-10-27 23:43:31 +09:00
ipv6	ip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit	2017-10-27 23:45:42 +09:00
ipx	net, ipx: convert ipx_route.refcnt from atomic_t to refcount_t	2017-07-04 22:35:17 +01:00
iucv	iucv: Convert sk_wmem_alloc accesses to refcount_t.	2017-07-03 02:31:22 -07:00
kcm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-09-01 17:42:05 -07:00
key	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-08-15 20:23:23 -07:00
l2tp	l2tp: check ps->sock before running pppol2tp_session_ioctl()	2017-10-14 18:38:56 -07:00
l3mdev
lapb	net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t	2017-07-04 22:35:16 +01:00
llc	net, llc: convert llc_sap.refcnt from atomic_t to refcount_t	2017-07-04 22:35:15 +01:00
mac80211	mac80211: don't compare TKIP TX MIC key in reinstall prevention	2017-10-25 11:04:45 +02:00
mac802154	net: Fix inconsistent teardown and release of private netdev state.	2017-06-07 15:53:24 -04:00
mpls	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
ncsi	net/ncsi: Fix length of GVI response packet	2017-10-21 01:56:38 +01:00
netfilter	netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'	2017-10-09 15:18:04 +02:00
netlabel
netlink	netlink: fix netlink_ack() extack race	2017-10-18 12:22:28 +01:00
netrom	net, netrom: convert nr_node.refcount from atomic_t to refcount_t	2017-07-04 22:35:17 +01:00
nfc	NFC: Add sockaddr length checks before accessing sa_family in bind handlers	2017-06-23 00:38:31 +02:00
nsh	nsh: add GSO support	2017-08-29 15:16:52 -07:00
openvswitch	openvswitch: Fix an error handling path in 'ovs_nla_init_match_and_action()'	2017-09-12 20:37:31 -07:00
packet	packet: avoid panic in packet_getsockopt()	2017-10-21 01:51:34 +01:00
phonet	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
psample	networking: make skb_put & friends return void pointers	2017-06-16 11:48:39 -04:00
qrtr	rtnetlink: make rtnl_register accept a flags parameter	2017-08-09 16:57:38 -07:00
rds	rds: Fix inaccurate accounting of unsignaled wrs	2017-10-26 17:35:57 +09:00
rfkill	net: rfkill: gpio: Switch to devm_acpi_dev_add_driver_gpios()	2017-06-13 11:07:51 +02:00
rose
rxrpc	rxrpc: Don't release call mutex on error pointer	2017-10-22 03:05:39 +01:00
sched	net/sched: cls_flower: Set egress_dev mark when calling into the HW driver	2017-10-16 21:18:59 +01:00
sctp	sctp: full support for ipv6 ip_nonlocal_bind & IP_FREEBIND	2017-10-24 18:39:46 +09:00
smc	net/smc: no close wait in case of process shut down	2017-09-21 15:31:03 -07:00
strparser	strparser: Use delayed work instead of timer for msg timeout	2017-10-25 10:37:11 +09:00
sunrpc	sunrpc: remove redundant initialization of sock	2017-10-01 18:51:30 -04:00
switchdev	net: switchdev: Remove bridge bypass support from switchdev	2017-08-07 14:48:48 -07:00
tipc	tipc: Unclone message at secondary destination lookup	2017-10-08 21:13:23 -07:00
tls	tls: make tls_sw_free_resources static	2017-09-14 09:55:21 -07:00
unix	net/unix: don't show information about sockets from other namespaces	2017-10-26 10:05:59 +09:00
vmw_vsock	hv_sock: add locking in the open/close/release code paths	2017-10-21 02:21:08 +01:00
wimax
wireless	cfg80211: fix connect/disconnect edge cases	2017-10-18 09:39:44 +02:00
x25	X25: constify null_x25_address	2017-08-03 09:13:51 -07:00
xfrm	ipsec: Fix aborted xfrm policy dump crash	2017-10-23 09:35:48 +02:00
compat.c	net: compat: assert the size of cmsg copied in is as expected	2017-09-20 15:36:18 -07:00
Kconfig	net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros.	2017-09-04 13:25:20 +02:00
Makefile	nsh: add GSO support	2017-08-29 15:16:52 -07:00
socket.c	net: fixes for skb_send_sock	2017-08-16 11:27:52 -07:00
sysctl_net.c