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cc1939e4b3
linux/include/net
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Vladimir Oltean cc1939e4b3 net: dsa: Allow drivers to filter packets they can decode source port from 
Frames get processed by DSA and redirected to switch port net devices
based on the ETH_P_XDSA multiplexed packet_type handler found by the
network stack when calling eth_type_trans().

The running assumption is that once the DSA .rcv function is called, DSA
is always able to decode the switch tag in order to change the skb->dev
from its master.

However there are tagging protocols (such as the new DSA_TAG_PROTO_SJA1105,
user of DSA_TAG_PROTO_8021Q) where this assumption is not completely
true, since switch tagging piggybacks on the absence of a vlan_filtering
bridge. Moreover, management traffic (BPDU, PTP) for this switch doesn't
rely on switch tagging, but on a different mechanism. So it would make
sense to at least be able to terminate that.

Having DSA receive traffic it can't decode would put it in an impossible
situation: the eth_type_trans() function would invoke the DSA .rcv(),
which could not change skb->dev, then eth_type_trans() would be invoked
again, which again would call the DSA .rcv, and the packet would never
be able to exit the DSA filter and would spiral in a loop until the
whole system dies.

This happens because eth_type_trans() doesn't actually look at the skb
(so as to identify a potential tag) when it deems it as being
ETH_P_XDSA. It just checks whether skb->dev has a DSA private pointer
installed (therefore it's a DSA master) and that there exists a .rcv
callback (everybody except DSA_TAG_PROTO_NONE has that). This is
understandable as there are many switch tags out there, and exhaustively
checking for all of them is far from ideal.

The solution lies in introducing a filtering function for each tagging
protocol. In the absence of a filtering function, all traffic is passed
to the .rcv DSA callback. The tagging protocol should see the filtering
function as a pre-validation that it can decode the incoming skb. The
traffic that doesn't match the filter will bypass the DSA .rcv callback
and be left on the master netdevice, which wasn't previously possible.

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 21:52:42 -07:00
..
9p 9p: Add refcount to p9_req_t 2018-09-08 01:39:47 +09:00
bluetooth Bluetooth: Ignore CC events not matching the last HCI command 2019-05-05 19:29:04 +02:00
caif caif: reduce stack size with KASAN 2018-01-19 14:02:12 -05:00
iucv net/af_iucv: locate IUCV header via skb_network_header() 2018-09-26 09:56:07 -07:00
netfilter netfilter: add API to manage NAT helpers. 2019-04-30 14:19:55 +02:00
netns netfilter: conntrack: limit sysctl setting for boolean options 2019-04-30 14:18:56 +02:00
nfc nfc: nci: Potential off by one in ->pipes[] array 2019-04-06 15:05:07 -07:00
phonet phonet: fix building with clang 2019-02-21 16:23:56 -08:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 22:14:21 -04:00
tc_act net/sched: move police action structures to header 2019-05-05 21:49:24 -07:00
6lowpan.h
act_api.h net/sched: let actions use RCU to access 'goto_chain' 2019-03-21 13:26:42 -07:00
addrconf.h ipv6: Move ipv6 stubs to a separate header file 2019-03-29 10:53:45 -07:00
af_ieee802154.h ieee802154: add rx LQI from userspace 2018-07-13 12:18:18 -04:00
af_rxrpc.h rxrpc: Make rxrpc_kernel_check_life() indicate if call completed 2019-04-12 16:57:23 -07:00
af_unix.h net: split out functions related to registering inflight socket files 2019-02-28 08:24:23 -07:00
af_vsock.h vsock: split dwork to avoid reinitializations 2018-08-07 12:39:13 -07:00
ah.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arp.h ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY 2018-01-15 14:53:43 -05:00
atmclip.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ax25.h ax25: fix possible use-after-free 2019-01-23 11:18:00 -08:00
ax88796.h net-next: ax88796: add interrupt status callback to platform data 2018-04-19 16:11:11 -04:00
bond_3ad.h bonding: count master 3ad stats separately 2019-01-24 22:18:48 -08:00
bond_alb.h
bond_options.h
bonding.h bonding: avoid possible dead-lock 2018-09-26 20:22:19 -07:00
bpf_sk_storage.h bpf: Introduce bpf sk local storage 2019-04-27 09:07:04 -07:00
busy_poll.h net: remove sock_poll_busy_flag 2018-07-30 09:10:25 -07:00
calipso.h
cfg80211-wext.h
cfg80211.h Various updates, notably: 2019-04-26 16:05:52 -04:00
cfg802154.h
checksum.h Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
cipso_ipv4.h
cls_cgroup.h
codel_impl.h
codel_qdisc.h
codel.h
compat.h net: rework SIOCGSTAMP ioctl handling 2019-04-19 14:07:40 -07:00
datalink.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dcbevent.h
dcbnl.h net: dcb: Add priority-to-DSCP map getters 2018-07-27 13:17:50 -07:00
devlink.h devlink: Change devlink health locking mechanism 2019-05-01 11:07:03 -04:00
dn_dev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_fib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_neigh.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_nsp.h net/decnet: Convert timers to use timer_setup() 2017-10-18 12:39:36 +01:00
dn_route.h decnet: Move dn_next into decnet route structure. 2017-11-30 09:54:25 -05:00
dn.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dsa.h net: dsa: Allow drivers to filter packets they can decode source port from 2019-05-05 21:52:42 -07:00
dsfield.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst_cache.h net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency 2018-03-05 12:52:45 -05:00
dst_metadata.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dst_ops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst.h net: dst: remove gc leftovers 2019-03-21 13:39:25 -07:00
erspan.h erspan: set bso bit based on mirrored packet's len 2018-05-20 18:31:42 -04:00
esp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ethoc.h inet: whitespace cleanup 2018-02-28 11:43:28 -05:00
failover.h net: Introduce generic failover module 2018-05-28 22:59:54 -04:00
fib_notifier.h net: fib: drop include of module.h from fib_notifier.h 2019-04-22 21:50:53 -07:00
fib_rules.h net: fib_rules: add extack support 2018-04-23 10:21:24 -04:00
firewire.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flow_dissector.h flow_dissector: switch kernel context to struct bpf_flow_dissector 2019-04-23 18:36:33 +02:00
flow_offload.h net/sched: add police action to the hardware intermediate representation 2019-05-05 21:49:24 -07:00
flow.h route: Add multipath_hash in flowi_common to make user-define hash 2019-02-27 12:50:17 -08:00
fou.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fq_impl.h mac80211: calculate hash for fq without holding fq->lock in itxq enqueue 2019-04-26 13:02:11 +02:00
fq.h fq: support filtering a given tin 2017-10-11 09:49:34 +02:00
garp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gen_stats.h net: align gnet_stats_basic_cpu struct 2018-11-17 21:37:29 -08:00
genetlink.h genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
geneve.h net: Move the definition of the default Geneve udp port to public header file 2019-03-22 12:09:31 -07:00
gre.h net: Add netif_is_gretap()/netif_is_ip6gretap() 2018-12-10 15:53:04 -08:00
gro_cells.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gtp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gue.h fou: fix some member types in guehdr 2017-12-11 14:10:06 -05:00
hwbm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
icmp.h net: Add __icmp_send helper. 2019-02-25 14:32:35 -08:00
ieee80211_radiotap.h wireless-drivers-next patches for 5.1 2019-02-22 12:56:24 -08:00
ieee802154_netdev.h
if_inet6.h net/ipv6: Add anycast addresses to a global hashtable 2018-11-02 23:54:56 -07:00
ife.h net: ife: drop include of module.h from net/ife.h 2019-04-22 21:50:53 -07:00
ila.h
inet6_connection_sock.h
inet6_hashtables.h net: allow binding socket in a VRF when there's an unbound socket 2018-11-07 16:12:38 -08:00
inet_common.h net: use indirect call wrappers at GRO transport layer 2018-12-15 13:23:02 -08:00
inet_connection_sock.h tcp: change pingpong threshold to 3 2019-01-27 13:29:43 -08:00
inet_ecn.h inet: Refactor INET_ECN_decapsulate() 2018-10-17 17:45:07 -07:00
inet_frag.h net: remove unused struct inet_frag_queue.fragments field 2019-02-26 08:27:05 -08:00
inet_hashtables.h net: dccp: fix kernel crash on module load 2018-12-24 15:27:56 -08:00
inet_sock.h net: ensure unbound stream socket to be chosen when not in a VRF 2018-11-07 16:12:38 -08:00
inet_timewait_sock.h net-tcp: remove useless tw_timeout field 2018-06-05 10:45:24 -04:00
inetpeer.h net: ipv4: use a dedicated counter for icmp_v4 redirect packets 2019-02-08 21:50:15 -08:00
ip6_checksum.h
ip6_fib.h ipv6: Use result arg in fib_lookup_arg consistently 2019-04-23 21:53:11 -07:00
ip6_route.h net: Change nhc_flags to unsigned char 2019-04-23 19:44:18 -07:00
ip6_tunnel.h udp: Support for error handlers of tunnels with arbitrary destination port 2018-11-08 17:13:08 -08:00
ip_fib.h ipv4: Move exception bucket to nh_common 2019-05-05 00:47:16 -07:00
ip_tunnels.h route: Add multipath_hash in flowi_common to make user-define hash 2019-02-27 12:50:17 -08:00
ip_vs.h ipvs: allow tunneling with gue encapsulation 2019-04-08 22:57:59 +02:00
ip.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-04-05 14:14:19 -07:00
ipcomp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipconfig.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipv6_frag.h net: IP6 defrag: use rbtrees for IPv6 defrag 2019-01-25 21:37:11 -08:00
ipv6_stubs.h ipv6: Pass fib6_result to fib lookups 2019-04-17 23:10:47 -07:00
ipv6.h ipv6: factor out protocol delivery helper 2018-11-07 16:23:05 -08:00
ipx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iw_handler.h net: Spelling s/stucture/structure/ 2018-03-27 09:51:23 +02:00
kcm.h
l3mdev.h ipvlan, l3mdev: fix broken l3s mode wrt local routes 2019-01-30 22:13:34 -08:00
lag.h net: Add lag.h, net_lag_port_dev_txable() 2018-07-11 23:10:19 -07:00
lapb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lib80211.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
llc_c_ac.h net: LLC: Convert timers to use timer_setup() 2017-10-25 12:06:25 +09:00
llc_c_ev.h
llc_c_st.h
llc_conn.h llc: delete timers synchronously in llc_sk_free() 2018-04-22 14:55:03 -04:00
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h llc: avoid blocking in llc_sap_close() 2018-09-13 09:04:58 -07:00
lwtunnel.h lwtunnel: Pass encap and encap type attributes to lwtunnel_fill_encap 2019-04-23 19:42:29 -07:00
mac80211.h Various updates, notably: 2019-04-26 16:05:52 -04:00
mac802154.h
mip6.h
mld.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpls_iptunnel.h
mpls.h
mrp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ncsi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ndisc.h ipv6: Add neighbor helpers that use the ipv6 stub 2019-04-08 15:22:40 -07:00
neighbour.h net ipv6: Prevent neighbor add if protocol is disabled on device 2019-04-17 23:19:07 -07:00
net_failover.h net: Introduce net_failover driver 2018-05-28 22:59:54 -04:00
net_namespace.h netns: provide pure entropy for net_hash_mix() 2019-03-28 17:00:45 -07:00
net_ratelimit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netevent.h net: ipv4: Notify about changes to ip_forward_update_priority 2018-08-01 09:52:30 -07:00
netlabel.h
netlink.h netlink: add validation of NLA_F_NESTED flag 2019-05-04 01:27:11 -04:00
netprio_cgroup.h
netrom.h net: netrom: Fix error cleanup path of nr_proto_init 2019-04-11 13:59:49 -07:00
nl802154.h
nsh.h openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
p8022.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
page_pool.h xdp: introduce xdp_return_frame_rx_napi 2018-05-24 18:36:15 -07:00
ping.h ipv{4,6}/ping: simplify proc file creation 2018-05-16 07:23:35 +02:00
pkt_cls.h net/sched: add block pointer to tc_cls_common_offload structure 2019-05-05 21:49:24 -07:00
pkt_sched.h net: sched: extend Qdisc with rcu 2018-09-25 20:17:35 -07:00
pptp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
protocol.h net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
psample.h net: psample: drop include of module.h from psample.h 2019-04-22 21:50:53 -07:00
psnap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raw.h net: fix raw socket lookup device bind matching with VRFs 2018-11-07 16:12:39 -08:00
rawv6.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
red.h net_sched: red: Avoid illegal values 2017-12-05 14:37:13 -05:00
regulatory.h cfg80211: make wmm_rule part of the reg_rule structure 2018-08-28 11:11:47 +02:00
request_sock.h tcp: free request sock directly upon TFO or syncookies error 2019-03-19 14:13:01 -07:00
rose.h proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
route.h ipv4: Add helpers for neigh lookup for nexthop 2019-04-08 15:22:41 -07:00
rsi_91x.h Bluetooth: btrsi: add new rsi bluetooth driver 2018-03-13 18:37:02 +02:00
rtnetlink.h net: Add extack argument to rtnl_create_link 2018-11-06 15:00:45 -08:00
rtnh.h net: Rename net/nexthop.h net/rtnh.h 2019-04-22 21:47:25 -07:00
sch_generic.h flow_dissector: switch kernel context to struct bpf_flow_dissector 2019-04-23 18:36:33 +02:00
scm.h pids: Compute task_tgid using signal->leader_pid 2018-07-21 10:43:12 -05:00
secure_seq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
seg6_hmac.h rhashtable: split rhashtable.h 2018-06-22 13:43:27 +09:00
seg6_local.h bpf: add End.DT6 action to bpf_lwt_seg6_action helper 2018-07-31 09:22:48 +02:00
seg6.h net: seg6.h: remove an unused #include 2018-12-20 16:56:04 -08:00
slhc_vj.h slip: Check if rstate is initialized before uncompressing 2018-04-11 10:33:46 -04:00
smc.h net/smc: add smcd support to the pnet table 2019-02-21 10:34:37 -08:00
snmp.h
sock_reuseport.h bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection 2018-08-11 01:58:46 +02:00
sock.h bpf: Introduce bpf sk local storage 2019-04-27 09:07:04 -07:00
Space.h net/mac89x0: Convert to platform_driver 2018-03-01 21:21:36 -05:00
stp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strparser.h strparser: Add __strp_unpause and use it in ktls. 2018-06-06 14:07:53 -04:00
switchdev.h switchdev: Remove unused transaction item queue 2019-03-01 21:35:19 -08:00
tcp_states.h tcp: remove the hardcode in the definition of TCPF Macro 2018-02-21 15:06:05 -05:00
tcp.h include/net/tcp.h: whitespace cleanup at tcp_v4_check 2019-04-22 21:45:58 -07:00
timewait_sock.h
tipc.h flow_dissector: do not rely on implicit casts 2018-05-08 00:02:41 -04:00
tls.h net/tls: byte swap device req TCP seq no upon setting 2019-04-27 16:52:21 -04:00
transp_v6.h ipv6: fold sockcm_cookie into ipcm6_cookie 2018-07-07 10:58:49 +09:00
tso.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tun_proto.h vxlan: factor out VXLAN-GPE next protocol 2017-08-29 15:16:52 -07:00
udp_tunnel.h ipv6: Move ipv6 stubs to a separate header file 2019-03-29 10:53:45 -07:00
udp.h datagram: remove rendundant 'peeked' argument 2019-04-08 09:51:54 -07:00
udplite.h udplite: fix partial checksum initialization 2018-02-16 15:57:42 -05:00
vsock_addr.h
vxlan.h net: Add IANA_VXLAN_UDP_PORT definition to vxlan header file 2019-03-22 12:09:31 -07:00
wext.h lift handling of SIOCIW... out of dev_ioctl() 2018-01-24 19:13:45 -05:00
wimax.h
x25.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x25device.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xdp_sock.h xsk: fix umem memory leak on cleanup 2019-03-16 01:27:51 +01:00
xdp.h xdp: export xdp_rxq_info_unreg_mem_model 2018-08-29 12:25:53 -07:00
xfrm.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 22:14:21 -04:00