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Sabrina Dubroca 16f7eb2b77 ip_tunnel: don't force DF when MTU is locked 
The various types of tunnels running over IPv4 can ask to set the DF
bit to do PMTU discovery. However, PMTU discovery is subject to the
threshold set by the net.ipv4.route.min_pmtu sysctl, and is also
disabled on routes with "mtu lock". In those cases, we shouldn't set
the DF bit.

This patch makes setting the DF bit conditional on the route's MTU
locking state.

This issue seems to be older than git history.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-17 21:50:55 -08:00
..
bpfilter
bpfilter: remove trailing newline
2018-07-24 14:10:42 -07:00
netfilter
netfilter: nf_nat_snmp_basic: add missing helper alias name
2018-10-16 10:01:50 +02:00
af_inet.c
gso_segment: Reset skb->mac_len after modifying network header
2018-09-13 12:09:32 -07:00
ah4.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
arp.c
net: Evict neighbor entries on carrier down
2018-10-12 09:47:39 -07:00
cipso_ipv4.c
net/ipv4: defensive cipso option parsing
2018-09-17 19:37:46 -07:00
datagram.c
ipv4: Allow sending multicast packets on specific i/f using VRF socket
2018-10-02 22:28:17 -07:00
devinet.c
net/{ipv4,ipv6}: Do not put target net if input nsid is invalid
2018-10-25 16:21:31 -07:00
esp4_offload.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2018-07-27 09:33:37 -07:00
esp4.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2018-10-01 22:31:17 -07:00
fib_frontend.c
net: Don't return invalid table id error when dumping all families
2018-10-24 14:06:25 -07:00
fib_lookup.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fib_notifier.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fib_rules.c
net: fib_rules: add extack support
2018-04-23 10:21:24 -04:00
fib_semantics.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-10-12 21:38:46 -07:00
fib_trie.c
net/ipv4: Plumb support for filtering route dumps
2018-10-16 00:13:12 -07:00
fou.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
gre_demux.c
ip_gre: fix parsing gre header in ipgre_err
2018-09-16 15:32:59 -07:00
gre_offload.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
icmp.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
igmp.c
ipv4/igmp: fix v1/v2 switchback timeout based on rfc3376, 8.12
2018-10-29 20:26:06 -07:00
inet_connection_sock.c
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-02 15:52:12 -07:00
inet_diag.c
sock_diag: request _diag module only when the family or proto has been registered
2018-03-12 11:03:42 -04:00
inet_fragment.c
inet: frags: better deal with smp races
2018-11-08 18:40:30 -08:00
inet_hashtables.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
inet_timewait_sock.c
soreuseport: initialise timewait reuseport field
2018-04-07 22:32:32 -04:00
inetpeer.c
inetpeer: fix uninit-value in inet_getpeer
2018-04-09 10:57:35 -04:00
ip_forward.c
net: ipv4: Control SKB reprioritization after forwarding
2018-08-01 09:52:30 -07:00
ip_fragment.c
net: drop skb on failure in ip_check_defrag()
2018-11-01 13:55:30 -07:00
ip_gre.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
ip_input.c
net: Add and use skb_list_del_init().
2018-09-10 10:06:54 -07:00
ip_options.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ip_output.c
net: Add and use skb_mark_not_on_list().
2018-09-10 10:06:54 -07:00
ip_sockglue.c
net: bpfilter: fix iptables failure if bpfilter_umh is disabled
2018-11-05 17:12:18 -08:00
ip_tunnel_core.c
ip_tunnel: don't force DF when MTU is locked
2018-11-17 21:50:55 -08:00
ip_tunnel.c
ip_tunnel: be careful when accessing the inner header
2018-09-24 12:27:04 -07:00
ip_vti.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
ipcomp.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
ipconfig.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
ipip.c
net-ipv4: remove 2 always zero parameters from ipv4_redirect()
2018-09-26 20:30:55 -07:00
ipmr_base.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-10-19 11:03:06 -07:00
ipmr.c
net: Don't return invalid table id error when dumping all families
2018-10-24 14:06:25 -07:00
Kconfig
net: remove blank lines at end of file
2018-07-24 14:10:43 -07:00
Makefile
bpf, sockmap: convert to generic sk_msg interface
2018-10-15 12:23:19 -07:00
metrics.c
net: common metrics init helper for FIB entries
2018-10-04 21:54:03 -07:00
netfilter.c
netfilter: utils: move nf_ip_checksum* from ipv4 to utils
2018-07-16 17:51:48 +02:00
netlink.c
ipv4: support sport, dport and ip_proto in RTM_GETROUTE
2018-05-23 15:14:12 -04:00
ping.c
ipv4: Allow sending multicast packets on specific i/f using VRF socket
2018-10-02 22:28:17 -07:00
proc.c
ip: discard IPv4 datagrams with overlapping segments.
2018-08-05 17:16:46 -07:00
protocol.c
net: Add sysctl to toggle early demux for tcp and udp
2017-03-24 13:17:07 -07:00
raw_diag.c
net: ipv6: add second dif to raw socket lookups
2017-08-07 11:39:22 -07:00
raw.c
ipv4: Allow sending multicast packets on specific i/f using VRF socket
2018-10-02 22:28:17 -07:00
route.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-10-12 21:38:46 -07:00
syncookies.c
tcp: provide earliest departure time in skb->tstamp
2018-09-21 19:37:59 -07:00
sysctl_net_ipv4.c
net-tcp: /proc/sys/net/ipv4/tcp_probe_interval is a u32 not int
2018-09-26 20:33:21 -07:00
tcp_bbr.c
tcp_bbr: centralize code to set gains
2018-10-17 22:22:53 -07:00
tcp_bic.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp_bpf.c
bpf: tcp_bpf_recvmsg should return EAGAIN when nonblocking and no data
2018-10-30 23:31:22 +01:00
tcp_cdg.c
tcp: cdg: use tcp high resolution clock cache
2018-10-15 22:56:42 -07:00
tcp_cong.c
tcp: Namespace-ify sysctl_tcp_default_congestion_control
2017-11-15 14:09:52 +09:00
tcp_cubic.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp_dctcp.c
tcp: refactor DCTCP ECN ACK handling
2018-10-10 22:26:00 -07:00
tcp_dctcp.h
tcp: refactor DCTCP ECN ACK handling
2018-10-10 22:26:00 -07:00
tcp_diag.c
net: sock: replace sk_state_load with inet_sk_state_load and remove sk_state_store
2017-12-20 14:00:25 -05:00
tcp_fastopen.c
tcp: pause Fast Open globally after third consecutive timeout
2017-12-13 15:51:12 -05:00
tcp_highspeed.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp_htcp.c
tcp: fix cwnd undo in Reno and HTCP congestion controls
2017-08-06 21:25:10 -07:00
tcp_hybla.c
tcp: make undo_cwnd mandatory for congestion modules
2016-11-21 13:20:17 -05:00
tcp_illinois.c
net/tcp/illinois: replace broken algorithm reference link
2018-02-28 12:03:47 -05:00
tcp_input.c
tcp: add tcp_reset_xmit_timer() helper
2018-10-23 19:42:44 -07:00
tcp_ipv4.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-10-03 21:00:17 -07:00
tcp_lp.c
tcp: switch TCP TS option (RFC 7323) to 1ms clock
2017-05-17 16:06:01 -04:00
tcp_metrics.c
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
tcp_minisocks.c
tcp: do not restart timewait timer on rst reception
2018-08-31 23:10:35 -07:00
tcp_nv.c
tcp_nv: fix potential integer overflow in tcpnv_acked
2018-01-31 10:26:30 -05:00
tcp_offload.c
tcp: Don't coalesce decrypted and encrypted SKBs
2018-07-16 00:12:09 -07:00
tcp_output.c
tcp: add tcp_reset_xmit_timer() helper
2018-10-23 19:42:44 -07:00
tcp_rate.c
tcp: introduce tcp_skb_timestamp_us() helper
2018-09-21 19:37:59 -07:00
tcp_recovery.c
tcp: introduce tcp_skb_timestamp_us() helper
2018-09-21 19:37:59 -07:00
tcp_scalable.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp_timer.c
tcp: do not change tcp_wstamp_ns in tcp_mstamp_refresh
2018-10-15 22:56:41 -07:00
tcp_ulp.c
tcp, ulp: remove socket lock assertion on ULP cleanup
2018-10-16 12:38:41 -07:00
tcp_vegas.c
tcp: fix under-evaluated ssthresh in TCP Vegas
2017-09-29 06:07:00 +01:00
tcp_vegas.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tcp_veno.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp_westwood.c
tcp: Revert "tcp: remove CA_ACK_SLOWPATH"
2017-08-30 11:20:08 -07:00
tcp_yeah.c
tcp: consolidate congestion control undo functions
2017-08-06 21:25:10 -07:00
tcp.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
tunnel4.c
inet: whitespace cleanup
2018-02-28 11:43:28 -05:00
udp_diag.c
net: diag: document swapped src/dst in udp_dump_one.
2018-10-28 19:27:21 -07:00
udp_impl.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
udp_offload.c
udp: gro behind static key
2018-10-05 11:52:38 -07:00
udp_tunnel.c
net: add infrastructure to un-offload UDP tunnel port
2017-07-24 13:52:59 -07:00
udp.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
udplite.c
proc: introduce proc_create_net{,_data}
2018-05-16 07:24:30 +02:00
xfrm4_input.c
xfrm: reset transport header back to network header after all input transforms ahave been applied
2018-09-04 10:26:30 +02:00
xfrm4_mode_beet.c
networking: make skb_pull & friends return void pointers
2017-06-16 11:48:39 -04:00
xfrm4_mode_transport.c
xfrm: reset transport header back to network header after all input transforms ahave been applied
2018-09-04 10:26:30 +02:00
xfrm4_mode_tunnel.c
xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto
2018-03-07 10:54:29 +01:00
xfrm4_output.c
net: xfrm: use skb_gso_validate_network_len() to check gso sizes
2018-03-04 17:49:17 -05:00
xfrm4_policy.c
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
xfrm4_protocol.c
xfrm: input: constify xfrm_input_afinfo
2017-02-09 10:22:17 +01:00
xfrm4_state.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xfrm4_tunnel.c
…