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David Ahern b8fb1ab461 net ipv6: Prevent neighbor add if protocol is disabled on device 
Disabling IPv6 on an interface removes existing entries but nothing prevents
new entries from being manually added. To that end, add a new neigh_table
operation, allow_add, that is called on RTM_NEWNEIGH to see if neighbor
entries are allowed on a given device. If IPv6 is disabled on the device,
allow_add returns false and passes a message back to the user via extack.

  $ echo 1 > /proc/sys/net/ipv6/conf/eth1/disable_ipv6
  $ ip -6 neigh add fe80::4c88:bff:fe21:2704 dev eth1 lladdr de:ad:be:ef:01:01
  Error: IPv6 is disabled on this device.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-17 23:19:07 -07:00
..
9p
9p: Add refcount to p9_req_t
2018-09-08 01:39:47 +09:00
bluetooth
Bluetooth: Add quirk for reading BD_ADDR from fwnode property
2019-02-26 10:08:26 +01:00
caif
…
iucv
net/af_iucv: locate IUCV header via skb_network_header()
2018-09-26 09:56:07 -07:00
netfilter
bridge: netfilter: unroll NF_HOOK helper in bridge input path
2019-04-12 01:47:39 +02:00
netns
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-04-05 14:14:19 -07:00
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
sctp: implement memory accounting on rx path
2019-04-15 13:36:51 -07:00
tc_act
net/sched: don't dereference a->goto_chain to read the chain index
2019-03-21 13:26:42 -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
…
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
…
ah.h
…
arp.h
…
atmclip.h
…
ax25.h
ax25: fix possible use-after-free
2019-01-23 11:18:00 -08:00
ax88796.h
…
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
busy_poll.h
…
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
cfg80211: add ratelimited variants of err and warn
2019-04-08 13:31:24 +02:00
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
…
datalink.h
…
dcbevent.h
…
dcbnl.h
…
devlink.h
net: devlink: introduce devlink_compat_switch_id_get() helper
2019-04-04 17:42:36 -07:00
dn_dev.h
…
dn_fib.h
…
dn_neigh.h
…
dn_nsp.h
…
dn_route.h
…
dn.h
…
dsa.h
net: dsa: read mac address from DT for slave device
2019-04-01 14:57:32 -07:00
dsfield.h
…
dst_cache.h
…
dst_metadata.h
…
dst_ops.h
…
dst.h
net: dst: remove gc leftovers
2019-03-21 13:39:25 -07:00
erspan.h
…
esp.h
…
ethoc.h
…
failover.h
…
fib_notifier.h
…
fib_rules.h
…
firewire.h
…
flow_dissector.h
net/flow_dissector: correct comments on enum flow_dissector_key_id
2018-11-30 13:21:52 -08:00
flow_offload.h
flow_offload: fix block stats
2019-02-13 21:07:47 -08:00
flow.h
route: Add multipath_hash in flowi_common to make user-define hash
2019-02-27 12:50:17 -08:00
fou.h
…
fq_impl.h
…
fq.h
…
garp.h
…
gen_stats.h
net: align gnet_stats_basic_cpu struct
2018-11-17 21:37:29 -08:00
genetlink.h
genetlink: make policy common to family
2019-03-22 10:38:23 -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
…
gtp.h
…
gue.h
…
hwbm.h
…
icmp.h
net: Add __icmp_send helper.
2019-02-25 14:32:35 -08:00
ieee80211_radiotap.h
Merge tag 'wireless-drivers-next-for-davem-2019-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
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
…
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
…
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: Add fib6_type and fib6_flags to fib6_result
2019-04-17 23:11:30 -07:00
ip6_route.h
ipv6: Pass fib6_result to ip6_mtu_from_fib6 and fib6_mtu
2019-04-17 23:10:46 -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: Allow ipv6 gateway with ipv4 routes
2019-04-08 15:22:41 -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
…
ipconfig.h
…
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
…
iw_handler.h
…
kcm.h
…
l3mdev.h
ipvlan, l3mdev: fix broken l3s mode wrt local routes
2019-01-30 22:13:34 -08:00
lag.h
…
lapb.h
…
lib80211.h
…
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
…
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
bpf: implement BPF_LWT_ENCAP_IP mode in bpf_lwt_push_encap
2019-02-13 18:27:55 -08:00
mac80211.h
mac80211: make ieee80211_schedule_txq schedule empty TXQs
2019-04-08 13:31:31 +02:00
mac802154.h
…
mip6.h
…
mld.h
…
mpls_iptunnel.h
…
mpls.h
…
mrp.h
…
ncsi.h
…
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_namespace.h
netns: provide pure entropy for net_hash_mix()
2019-03-28 17:00:45 -07:00
net_ratelimit.h
…
netevent.h
…
netlabel.h
…
netlink.h
netlink: reduce NLA_POLICY_NESTED{,_ARRAY} arguments
2019-02-01 11:06:55 +01:00
netprio_cgroup.h
…
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-04-11 13:59:49 -07:00
nexthop.h
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nl802154.h
…
nsh.h
…
p8022.h
…
page_pool.h
…
ping.h
…
pkt_cls.h
net: sched: set dedicated tcf_walker flag when tp is empty
2019-02-25 10:18:17 -08:00
pkt_sched.h
net: sched: extend Qdisc with rcu
2018-09-25 20:17:35 -07:00
pptp.h
…
protocol.h
net: Convert protocol error handlers from void to int
2018-11-08 17:13:08 -08:00
psample.h
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psnap.h
…
raw.h
net: fix raw socket lookup device bind matching with VRFs
2018-11-07 16:12:39 -08:00
rawv6.h
…
red.h
…
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
…
route.h
ipv4: Add helpers for neigh lookup for nexthop
2019-04-08 15:22:41 -07:00
rsi_91x.h
…
rtnetlink.h
net: Add extack argument to rtnl_create_link
2018-11-06 15:00:45 -08:00
sch_generic.h
Revert: "net: sched: put back q.qlen into a single location"
2019-04-10 12:20:46 -07:00
scm.h
…
secure_seq.h
…
seg6_hmac.h
…
seg6_local.h
…
seg6.h
net: seg6.h: remove an unused #include
2018-12-20 16:56:04 -08:00
slhc_vj.h
…
smc.h
net/smc: add smcd support to the pnet table
2019-02-21 10:34:37 -08:00
snmp.h
…
sock_reuseport.h
…
sock.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-04-17 11:26:25 -07:00
Space.h
…
stp.h
…
strparser.h
…
switchdev.h
switchdev: Remove unused transaction item queue
2019-03-01 21:35:19 -08:00
tcp_states.h
…
tcp.h
tcp: convert tcp_md5_needed to static_branch API
2019-02-26 13:16:03 -08:00
timewait_sock.h
…
tipc.h
…
tls.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-04-17 11:26:25 -07:00
transp_v6.h
…
tso.h
…
tun_proto.h
…
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
…
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
…
wimax.h
…
x25.h
…
x25device.h
…
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
xfrm: destroy xfrm_state synchronously on net exit path
2019-02-05 06:29:20 +01:00