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Paolo Abeni bc044e8db7 udp: perform source validation for mcast early demux 
The UDP early demux can leverate the rx dst cache even for
multicast unconnected sockets.

In such scenario the ipv4 source address is validated only on
the first packet in the given flow. After that, when we fetch
the dst entry  from the socket rx cache, we stop enforcing
the rp_filter and we even start accepting any kind of martian
addresses.

Disabling the dst cache for unconnected multicast socket will
cause large performace regression, nearly reducing by half the
max ingress tput.

Instead we factor out a route helper to completely validate an
skb source address for multicast packets and we call it from
the UDP early demux for mcast packets landing on unconnected
sockets, after successful fetching the related cached dst entry.

This still gives a measurable, but limited performance
regression:

		rp_filter = 0		rp_filter = 1
edmux disabled:	1182 Kpps		1127 Kpps
edmux before:	2238 Kpps		2238 Kpps
edmux after:	2037 Kpps		2019 Kpps

The above figures are on top of current net tree.
Applying the net-next commit 6e617de84e ("net: avoid a full
fib lookup when rp_filter is disabled.") the delta with
rp_filter == 0 will decrease even more.

Fixes: 421b3885bf ("udp: ipv4: Add udp early demux")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-10-01 03:55:47 +01:00
..
9p 9p: Implement show_options 2017-07-11 06:08:58 -04:00
bluetooth Bluetooth: make baswap src const 2017-09-01 22:49:47 +02:00
caif
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iucv s390/iucv: do not use arrays as argument 2015-09-21 16:03:04 -07:00
netfilter netfilter: nat: Revert "netfilter: nat: convert nat bysrc hash to rhashtable" 2017-09-08 18:55:50 +02:00
netns Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2017-09-03 17:08:42 -07:00
nfc NFC: Add nfc_dbg() macro 2017-04-05 10:15:20 +02:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
sctp sctp: fix an use-after-free issue in sctp_sock_dump 2017-09-15 14:47:49 -07:00
tc_act net: sched: add couple of goto_chain helpers 2017-08-23 20:44:32 -07:00
6lowpan.h 6lowpan: Fix IID format for Bluetooth 2017-04-12 22:02:36 +02:00
Space.h
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act_api.h net_sched: get rid of tcfa_rcu 2017-09-12 20:41:02 -07:00
addrconf.h ipv6: fix NULL dereference in ip6_route_dev_notify() 2017-08-15 17:06:34 -07:00
af_ieee802154.h ieee802154: af_ieee802154: fix typo in comment. 2015-09-17 13:20:05 +02:00
af_rxrpc.h rxrpc: Allow failed client calls to be retried 2017-08-29 10:55:20 +01:00
af_unix.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-07-21 03:38:43 +01:00
af_vsock.h VSOCK: Add vsockmon tap functions 2017-04-24 12:35:56 -04:00
ah.h
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arp.h net: convert neighbour.refcnt from atomic_t to refcount_t 2017-07-01 07:39:07 -07:00
atmclip.h
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ax25.h net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t 2017-07-04 22:35:19 +01:00
ax88796.h
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bond_3ad.h bonding: 3ad: apply ad_actor settings changes immediately 2016-02-09 04:45:49 -05:00
bond_alb.h
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bond_options.h bonding: Prevent duplicate userspace notification 2017-05-27 18:51:41 -04:00
bonding.h bonding: require speed/duplex only for 802.3ad, alb and tlb 2017-08-11 14:21:42 -07:00
busy_poll.h net: fix compilation when busy poll is not enabled 2017-08-11 14:59:24 -07:00
calipso.h net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t 2017-07-04 22:35:16 +01:00
cfg80211-wext.h
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cfg80211.h nl80211: add authorized flag to ROAM event 2017-06-13 11:04:37 +02:00
cfg802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
checksum.h csum: eliminate sparse warning in remcsum_unadjust() 2017-01-20 12:12:13 -05:00
cipso_ipv4.h net, ipv4: convert cipso_v4_doi.refcount from atomic_t to refcount_t 2017-07-04 01:29:04 -07:00
cls_cgroup.h cls_cgroup: get sk_classid only from full sockets 2016-04-19 20:09:25 -04:00
codel.h codel: split into multiple files 2016-04-25 16:44:27 -04:00
codel_impl.h codel: split into multiple files 2016-04-25 16:44:27 -04:00
codel_qdisc.h net_sched: fq_codel: cache skb->truesize into skb->cb 2016-06-25 12:19:35 -04:00
compat.h packet: compat support for sock_fprog 2016-06-09 23:41:03 -07:00
datalink.h
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dcbevent.h
…
dcbnl.h
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devlink.h devlink: Add IPv6 header for dpipe 2017-08-31 14:42:19 -07:00
dn.h
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dn_dev.h
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dn_fib.h net, decnet: convert dn_fib_info.fib_clntref from atomic_t to refcount_t 2017-07-04 22:35:15 +01:00
dn_neigh.h netfilter: Pass net into okfn 2015-09-17 17:18:37 -07:00
dn_nsp.h
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dn_route.h
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dsa.h net: dsa: Allow switch drivers to indicate number of TX queues 2017-09-05 11:53:34 -07:00
dsfield.h
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dst.h net: prevent dst uses after free 2017-09-21 20:42:15 -07:00
dst_cache.h net: add dst_cache support 2016-02-16 20:21:48 -05:00
dst_metadata.h net: store port/representator id in metadata_dst 2017-06-25 11:42:01 -04:00
dst_ops.h net: add confirm_neigh method to dst_ops 2017-02-07 13:07:46 -05:00
erspan.h gre: introduce native tunnel support for ERSPAN 2017-08-22 14:29:30 -07:00
esp.h esp6: Reorganize esp_output 2017-04-14 10:06:42 +02:00
ethoc.h net/ethoc: support big-endian register layout 2015-09-23 15:33:15 -07:00
fib_notifier.h net: Add module reference to FIB notifiers 2017-09-01 20:33:42 -07:00
fib_rules.h net: fib_rules: Implement notification logic in core 2017-08-03 15:35:59 -07:00
firewire.h
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flow.h net: Extend struct flowi6 with multipath hash 2017-08-24 18:21:17 -07:00
flow_dissector.h flow_dissector: Cleanup control flow 2017-09-05 11:40:08 -07:00
fou.h fou: Add encap ops for IPv6 tunnels 2016-05-20 18:03:16 -04:00
fq.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
fq_impl.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
garp.h
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gen_stats.h net_sched: gen_estimator: complete rewrite of rate estimators 2016-12-05 15:21:59 -05:00
genetlink.h genetlink: remove ops_list from genetlink header. 2017-06-05 10:54:55 -04:00
geneve.h net: Remove deprecated tunnel specific UDP offload functions 2016-06-17 20:23:32 -07:00
gre.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-08-18 01:17:32 -04:00
gro_cells.h gro_cells: move to net/core/gro_cells.c 2017-02-08 14:38:18 -05:00
gtp.h gtp: #define #define _GTP_H_ and not #define _GTP_H 2016-07-25 17:55:43 -07:00
gue.h
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hwbm.h net: add a hardware buffer management helper API 2016-03-14 12:19:46 -04:00
icmp.h net: snmp: kill STATS_BH macros 2016-04-27 22:48:25 -04:00
ieee80211_radiotap.h wireless: radiotap: rewrite the radiotap header file 2017-01-25 16:00:33 +01:00
ieee802154_netdev.h mac802154: constify ieee802154_llsec_ops structure 2016-01-04 20:40:41 +01:00
if_inet6.h net, ipv6: convert ifacaddr6.aca_refcnt from atomic_t to refcount_t 2017-07-04 01:29:04 -07:00
ife.h net: Introduce ife encapsulation module 2017-02-03 15:16:45 -05:00
ila.h ila: Add generic ILA translation facility 2015-12-15 23:25:20 -05:00
inet6_connection_sock.h inet: drop ->bind_conflict 2017-01-18 13:04:28 -05:00
inet6_hashtables.h net: ipv6: add second dif to inet6 socket lookups 2017-08-07 11:39:22 -07:00
inet_common.h net: Work around lockdep limitation in sockets that use sockets 2017-03-09 18:23:27 -08:00
inet_connection_sock.h tcp: ULP infrastructure 2017-06-15 12:12:40 -04:00
inet_ecn.h ipv6: suppress sparse warnings in IP6_ECN_set_ce() 2016-08-13 15:08:00 -07:00
inet_frag.h Revert "net: fix percpu memory leaks" 2017-09-03 11:01:05 -07:00
inet_hashtables.h net: ipv4: add second dif to inet socket lookups 2017-08-07 11:39:21 -07:00
inet_sock.h net/tcp-fastopen: Add new API support 2017-01-25 14:04:38 -05:00
inet_timewait_sock.h ipv4: Namespaceify tcp_tw_recycle and tcp_max_tw_buckets knob 2016-12-29 11:38:31 -05:00
inetpeer.h inetpeer: remove AVL implementation in favor of RB tree 2017-07-17 08:59:01 -07:00
ip.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
ip6_checksum.h ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short 2016-03-13 23:55:13 -04:00
ip6_fib.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
ip6_route.h ipv6: Use rt6i_idev index for echo replies to a local address 2017-08-29 15:32:25 -07:00
ip6_tunnel.h ip6_tunnel: Allow policy-based routing through tunnels 2017-04-21 13:21:30 -04:00
ip_fib.h net: fib_rules: Implement notification logic in core 2017-08-03 15:35:59 -07:00
ip_tunnels.h gre: add collect_md mode to ERSPAN tunnel 2017-08-28 15:04:52 -07:00
ip_vs.h ipvs: remove unused function ip_vs_set_state_timeout 2017-04-28 12:00:10 +02:00
ipcomp.h
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ipconfig.h
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ipv6.h net, ipv6: convert ipv6_txoptions.refcnt from atomic_t to refcount_t 2017-07-04 01:29:03 -07:00
ipx.h net, ipx: convert ipx_route.refcnt from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
iw_handler.h wext: uninline stream addition functions 2017-01-13 09:38:42 +01:00
kcm.h kcm: Use stream parser 2016-08-17 19:36:23 -04:00
l3mdev.h net: ipv4: Do not drop to make_route if oif is l3mdev 2016-10-13 12:05:26 -04:00
lapb.h net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t 2017-07-04 22:35:16 +01:00
lib80211.h
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llc.h net, llc: convert llc_sap.refcnt from atomic_t to refcount_t 2017-07-04 22:35:15 +01:00
llc_c_ac.h
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llc_c_ev.h
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llc_c_st.h
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llc_conn.h net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
llc_if.h
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llc_pdu.h
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llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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lwtunnel.h net: add extack arg to lwtunnel build state 2017-05-30 11:55:32 -04:00
mac80211.h mac80211: fix VLAN handling with TXQs 2017-09-05 11:28:43 +02:00
mac802154.h ieee802154: cleanup WARN_ON for fc fetch 2016-07-08 13:23:12 +02:00
mip6.h
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mld.h
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mpls.h openvswitch: use mpls_hdr 2016-10-03 02:00:22 -04:00
mpls_iptunnel.h net: mpls: Increase max number of labels for lwt encap 2017-04-01 20:21:44 -07:00
mrp.h
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ncsi.h net/ncsi: fix ncsi_vlan_rx_{add,kill}_vid references 2017-09-05 09:11:45 -07:00
ndisc.h net: convert neighbour.refcnt from atomic_t to refcount_t 2017-07-01 07:39:07 -07:00
neighbour.h Now that IPC and other changes have landed, enable manual markings for 2017-07-19 08:55:18 -07:00
net_namespace.h net: core: Make the FIB notification chain generic 2017-08-03 15:35:59 -07:00
net_ratelimit.h
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netevent.h neigh: Send a notification when DELAY_PROBE_TIME changes 2016-07-05 09:06:29 -07:00
netlabel.h net: convert netlbl_lsm_cache.refcount from atomic_t to refcount_t 2017-07-01 07:39:09 -07:00
netlink.h netlink: fix nla_put_{u8,u16,u32} for KASAN 2017-09-25 20:18:27 -07:00
netprio_cgroup.h net: wrap sock->sk_cgrp_prioidx and ->sk_classid inside a struct 2015-12-08 22:02:33 -05:00
netrom.h net, netrom: convert nr_node.refcount from atomic_t to refcount_t 2017-07-04 22:35:17 +01:00
nexthop.h
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nl802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
nsh.h net: add NSH header structures and helpers 2017-08-29 15:16:52 -07:00
p8022.h
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ping.h net: ping: make ping_v6_sendmsg static 2016-03-23 22:09:58 -04:00
pkt_cls.h net: sched: remove cops->tcf_cl_offload 2017-08-11 13:47:01 -07:00
pkt_sched.h net: sched: Add helpers to identify classids 2017-08-11 13:47:00 -07:00
pptp.h pptp: Refactor the struct and macros of PPTP codes 2016-08-15 10:55:53 -07:00
protocol.h IPv4: early demux can return an error code 2017-10-01 03:55:47 +01:00
psample.h net: Introduce psample, a new genetlink channel for packet sampling 2017-01-24 13:44:28 -05:00
psnap.h
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raw.h net: ipv4: add second dif to raw socket lookups 2017-08-07 11:39:21 -07:00
rawv6.h net: ipv6: add second dif to raw socket lookups 2017-08-07 11:39:22 -07:00
red.h ktime: Get rid of the union 2016-12-25 17:21:22 +01:00
regulatory.h
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request_sock.h net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
rose.h
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route.h udp: perform source validation for mcast early demux 2017-10-01 03:55:47 +01:00
rtnetlink.h rtnetlink: add RTNL_FLAG_DOIT_UNLOCKED 2017-08-09 16:57:38 -07:00
sch_generic.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
scm.h sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h> 2017-03-02 08:42:31 +01:00
secure_seq.h tcp: Namespaceify sysctl_tcp_timestamps 2017-06-08 10:53:29 -04:00
seg6.h ipv6: sr: add support for ip4ip6 encapsulation 2017-08-25 17:10:23 -07:00
seg6_hmac.h ipv6: sr: add core files for SR HMAC support 2016-11-09 20:40:06 -05:00
slhc_vj.h
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smc.h smc: netlink interface for SMC sockets 2017-01-09 16:07:41 -05:00
snmp.h net: snmp: fix 64bit stats on 32bit arches 2016-04-28 11:49:45 -04:00
sock.h net: prevent dst uses after free 2017-09-21 20:42:15 -07:00
sock_reuseport.h soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind 2016-01-19 14:44:23 -05:00
stp.h
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strparser.h strparser: initialize all callbacks 2017-08-24 21:57:50 -07:00
switchdev.h net: switchdev: Remove bridge bypass support from switchdev 2017-08-07 14:48:48 -07:00
tcp.h IPv4: early demux can return an error code 2017-10-01 03:55:47 +01:00
tcp_states.h
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timewait_sock.h inet: remove BUG_ON() in twsk_destructor() 2015-07-09 15:12:20 -07:00
tls.h tls: kernel TLS support 2017-06-15 12:12:40 -04:00
transp_v6.h ipv6: add new struct ipcm6_cookie 2016-05-03 16:08:14 -04:00
tso.h net: define the TSO header size in net/tso.h 2017-08-23 20:42:09 -07:00
tun_proto.h vxlan: factor out VXLAN-GPE next protocol 2017-08-29 15:16:52 -07:00
udp.h IPv4: early demux can return an error code 2017-10-01 03:55:47 +01:00
udp_tunnel.h net: add infrastructure to un-offload UDP tunnel port 2017-07-24 13:52:59 -07:00
udplite.h udp: use a separate rx queue for packet reception 2017-05-16 15:41:29 -04:00
vsock_addr.h
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vxlan.h vxlan: factor out VXLAN-GPE next protocol 2017-08-29 15:16:52 -07:00
wext.h dev_ioctl: copy only the smaller struct iwreq for wext 2017-06-14 13:52:44 +02:00
wimax.h
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x25.h net, x25: convert x25_neigh.refcnt from atomic_t to refcount_t 2017-07-04 22:35:18 +01:00
x25device.h
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xfrm.h xfrm: Add support for network devices capable of removing the ESP trailer 2017-08-31 09:04:03 +02:00