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Peter Dawson 0e9a709560 ip6_tunnel, ip6_gre: fix setting of DSCP on encapsulated packets 
This fix addresses two problems in the way the DSCP field is formulated
 on the encapsulating header of IPv6 tunnels.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195661

1) The IPv6 tunneling code was manipulating the DSCP field of the
 encapsulating packet using the 32b flowlabel. Since the flowlabel is
 only the lower 20b it was incorrect to assume that the upper 12b
 containing the DSCP and ECN fields would remain intact when formulating
 the encapsulating header. This fix handles the 'inherit' and
 'fixed-value' DSCP cases explicitly using the extant dsfield u8 variable.

2) The use of INET_ECN_encapsulate(0, dsfield) in ip6_tnl_xmit was
 incorrect and resulted in the DSCP value always being set to 0.

Commit 90427ef5d2 ("ipv6: fix flow labels when the traffic class
 is non-0") caused the regression by masking out the flowlabel
 which exposed the incorrect handling of the DSCP portion of the
 flowlabel in ip6_tunnel and ip6_gre.

Fixes: 90427ef5d2 ("ipv6: fix flow labels when the traffic class is non-0")
Signed-off-by: Peter Dawson <peter.a.dawson@boeing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-05-26 14:54:39 -04:00
..
ila net/ipv6/ila/ila_xlat.c: simplify a strange allocation pattern 2017-05-08 17:15:12 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2017-05-03 10:11:26 -04:00
Kconfig ipv6: sr: select DST_CACHE by default 2017-03-27 16:05:06 -07:00
Makefile esp: Add a software GRO codepath 2017-02-15 11:04:11 +01:00
addrconf.c ipv6: avoid dad-failures for addresses with NODAD 2017-05-15 14:31:51 -04:00
addrconf_core.c ipv6: change ipv6_stub_impl.ipv6_dst_lookup to take net argument 2015-07-31 15:21:30 -07:00
addrlabel.c net: rtnetlink: plumb extended ack to doit function 2017-04-17 15:35:38 -04:00
af_inet6.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-26 22:39:08 -04:00
ah6.c IPsec: do not ignore crypto err in ah6 input 2017-01-16 12:57:48 +01:00
anycast.c ipv6: coding style: comparison for equality with NULL 2015-03-31 13:51:54 -04:00
calipso.c calipso: fix resource leak on calipso_genopt failure 2016-08-13 14:56:17 -07:00
datagram.c net-timestamp: avoid use-after-free in ip_recv_error 2017-04-17 12:59:22 -04:00
esp6.c esp: Fix misplaced spin_unlock_bh. 2017-04-24 07:56:31 +02:00
esp6_offload.c esp4/6: Fix GSO path for non-GSO SW-crypto packets 2017-04-19 07:48:57 +02:00
exthdrs.c ipv6: Need to export ipv6_push_frag_opts for tunneling now. 2017-05-01 15:10:20 -04:00
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_rules.c net: flow: Add l3mdev flow update 2016-09-10 23:12:51 -07:00
fou6.c fou: add Kconfig options for IPv6 support 2016-05-29 22:24:21 -07:00
icmp.c net: for rate-limited ICMP replies save one atomic operation 2017-01-09 15:49:12 -05:00
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 inet: collapse ipv4/v6 rcv_saddr_equal functions into one 2017-01-18 13:04:28 -05:00
ip6_checksum.c ipv6: fix checksum annotation in udp6_csum_init 2016-06-14 15:26:42 -04:00
ip6_fib.c ipv6: make ECMP route replacement less greedy 2017-03-13 12:16:17 -07:00
ip6_flowlabel.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
ip6_gre.c ip6_tunnel, ip6_gre: fix setting of DSCP on encapsulated packets 2017-05-26 14:54:39 -04:00
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 ipv6: Check ip6_find_1stfragopt() return value properly. 2017-05-17 22:54:11 -04:00
ip6_offload.h udp: Add GRO functions to UDP socket 2016-04-07 16:53:29 -04:00
ip6_output.c ipv6: fix out of bound writes in __ip6_append_data() 2017-05-22 11:47:44 -04:00
ip6_tunnel.c ip6_tunnel, ip6_gre: fix setting of DSCP on encapsulated packets 2017-05-26 14:54:39 -04:00
ip6_udp_tunnel.c ip6_udp_tunnel: remove unused IPCB related codes 2016-11-02 15:18:36 -04:00
ip6_vti.c ip6_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:30 -04:00
ip6mr.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-21 20:23:53 -07:00
ipcomp6.c net: inet: Support UID-based routing in IP protocols. 2016-11-04 14:45:23 -04:00
ipv6_sockglue.c net: Allow IP_MULTICAST_IF to set index to L3 slave 2016-12-30 15:24:47 -05:00
mcast.c ipv6: add support for NETDEV_RESEND_IGMP event 2017-03-28 22:02:21 -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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-26 22:39:08 -04:00
netfilter.c net: inet: Support UID-based routing in IP protocols. 2016-11-04 14:45:23 -04:00
output_core.c ipv6: Prevent overrun when parsing v6 header options 2017-05-17 14:55:59 -04:00
ping.c ipv6: remove unnecessary inet6_sk check 2016-12-29 12:05:49 -05:00
proc.c proc: Reduce cache miss in snmp6_seq_show 2016-09-30 01:50:44 -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 ipv4, ipv6: ensure raw socket message is big enough to hold an IP header 2017-05-04 11:02:46 -04:00
reassembly.c ipv6: on reassembly, record frag_max_size 2016-11-03 15:41:11 -04:00
route.c ipv6: reorder ip6_route_dev_notifier after ipv6_dev_notf 2017-05-08 17:31:24 -04:00
seg6.c ipv6: sr: fix out-of-bounds access in SRH validation 2017-04-20 15:40:33 -04:00
seg6_hmac.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-02-07 16:29:30 -05:00
seg6_iptunnel.c ipv6: sr: fix BUG due to headroom too small after SRH push 2017-04-17 15:33:53 -04:00
sit.c ip_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:31 -04:00
syncookies.c tcp: randomize timestamps on syncookies 2017-05-05 12:00:11 -04:00
sysctl_net_ipv6.c calipso: Add a label cache. 2016-06-27 15:06:17 -04:00
tcp_ipv6.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-05-15 15:50:49 -07:00
tcpv6_offload.c
…
tunnel6.c ipv6: fix tunnel error handling 2015-11-03 10:52:13 -05:00
udp.c udp: make *udp*_queue_rcv_skb() functions static 2017-05-18 10:23:33 -04:00
udp_impl.h udp: make *udp*_queue_rcv_skb() functions static 2017-05-18 10:23:33 -04:00
udp_offload.c ipv6: Check ip6_find_1stfragopt() return value properly. 2017-05-17 22:54:11 -04:00
udplite.c udplite: call proper backlog handlers 2016-11-24 15:32:14 -05:00
xfrm6_input.c esp: Add a software GRO codepath 2017-02-15 11:04:11 +01:00
xfrm6_mode_beet.c xfrm: simplify xfrm_address_t use 2015-03-31 13:58:35 -04:00
xfrm6_mode_ro.c
…
xfrm6_mode_transport.c xfrm: Add encapsulation header offsets while SKB is not encrypted 2017-04-14 10:07:39 +02:00
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 xfrm: policy: make policy backend const 2017-02-09 10:22:19 +01:00
xfrm6_protocol.c xfrm: input: constify xfrm_input_afinfo 2017-02-09 10:22:17 +01:00
xfrm6_state.c
…
xfrm6_tunnel.c netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00