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Eyal Birger abc340b38b xfrm: interface: support collect metadata mode 
This commit adds support for 'collect_md' mode on xfrm interfaces.

Each net can have one collect_md device, created by providing the
IFLA_XFRM_COLLECT_METADATA flag at creation. This device cannot be
altered and has no if_id or link device attributes.

On transmit to this device, the if_id is fetched from the attached dst
metadata on the skb. If exists, the link property is also fetched from
the metadata. The dst metadata type used is METADATA_XFRM which holds
these properties.

On the receive side, xfrmi_rcv_cb() populates a dst metadata for each
packet received and attaches it to the skb. The if_id used in this case is
fetched from the xfrm state, and the link is fetched from the incoming
device. This information can later be used by upper layers such as tc,
ebpf, and ip rules.

Because the skb is scrubed in xfrmi_rcv_cb(), the attachment of the dst
metadata is postponed until after scrubing. Similarly, xfrm_input() is
adapted to avoid dropping metadata dsts by only dropping 'valid'
(skb_valid_dst(skb) == true) dsts.

Policy matching on packets arriving from collect_md xfrmi devices is
done by using the xfrm state existing in the skb's sec_path.
The xfrm_if_cb.decode_cb() interface implemented by xfrmi_decode_session()
is changed to keep the details of the if_id extraction tucked away
in xfrm_interface.c.

Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
 		2022-08-29 10:41:28 +02:00
..
9p 9p: Add client parameter to p9_req_put() 2022-07-09 14:38:35 +09:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-07-28 18:21:16 -07:00
caif net: remove the caif_hsi driver 2021-07-01 13:19:48 -07:00
iucv net/af_iucv: Use struct_group() to zero struct iucv_sock region 2021-11-19 11:52:25 +00:00
netfilter netfilter: nf_tables: disallow jump to implicit chain from set element 2022-08-09 20:13:29 +02:00
netns net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
nfc NFC: add NCI_UNREG flag to eliminate the race 2021-11-17 20:17:05 -08:00
phonet net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
sctp net: remove noblock parameter from recvmsg() entities 2022-04-12 15:00:25 +02:00
tc_act Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-05-12 16:15:30 -07:00
6lowpan.h
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Space.h wan: remove sbni/granch driver 2021-08-03 13:05:26 +01:00
act_api.h net/sched: act_api: Add extack to offload_act_setup() callback 2022-04-08 13:45:43 +01:00
addrconf.h ipv6/addrconf: fix a null-ptr-deref bug for ip6_ptr 2022-07-28 10:42:44 -07:00
af_ieee802154.h
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af_rxrpc.h afs: Don't truncate iter during data fetch 2021-04-23 10:17:26 +01:00
af_unix.h af_unix: Remove unix_table_locks. 2022-06-22 12:59:43 +01:00
af_vsock.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ah.h
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amt.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
arp.h ipv4: Invalidate neighbour for broadcast address upon address addition 2022-02-21 11:44:30 +00:00
atmclip.h
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ax25.h ax25: fix incorrect dev_tracker usage 2022-07-28 22:06:15 -07:00
ax88796.h ax88796: Fix some typo in a comment 2022-08-09 22:14:02 -07:00
bareudp.h bareudp: Move definition of struct bareudp_conf to bareudp.c 2021-12-13 12:34:09 +00:00
bond_3ad.h bonding: fix data-races around agg_select_timer 2022-02-15 14:35:18 +00:00
bond_alb.h bonding: make tx_rebalance_counter an atomic 2021-12-03 14:16:48 +00:00
bond_options.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
bonding.h net: bonding: replace dev_trans_start() with the jiffies of the last ARP/NS 2022-08-03 19:20:12 -07:00
bpf_sk_storage.h bpf: struct sock is declared twice in bpf_sk_storage header 2021-03-26 17:43:55 +01:00
busy_poll.h tcp: fix another uninit-value (sk_rx_queue_mapping) 2021-12-03 14:15:49 +00:00
calipso.h
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cfg80211-wext.h
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cfg80211.h wifi: nl80211: add MLO link ID to the NL80211_CMD_FRAME TX API 2022-07-22 14:28:33 +02:00
cfg802154.h net: wrap the wireless pointers in struct net_device in an ifdef 2022-05-22 21:51:54 +01:00
checksum.h powerpc/net: Implement powerpc specific csum_shift() to remove branch 2022-03-11 10:57:22 +00:00
cipso_ipv4.h
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cls_cgroup.h
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codel.h codel: remove unnecessary pkt_sched.h include 2021-12-22 15:03:51 -08:00
codel_impl.h codel: remove unnecessary sock.h include 2021-12-22 15:03:47 -08:00
codel_qdisc.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
compat.h net: copy from user before calling __get_compat_msghdr 2022-07-24 18:39:17 -06:00
datalink.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dcbevent.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dcbnl.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
devlink.h devlink: introduce framework for selftests 2022-07-28 21:56:53 -07:00
dn.h decnet: constify dev_addr passing 2021-10-13 09:40:46 -07:00
dn_dev.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dn_fib.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dn_neigh.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dn_nsp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dn_route.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
dropreason.h net: dropreason: reformat the comment fo skb drop reasons 2022-06-07 12:51:41 +02:00
dsa.h net: dsa: tag_ksz: add tag handling for Microchip LAN937x 2022-07-02 16:34:05 +01:00
dsfield.h
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dst.h net: dst: add net device refcount tracking to dst_entry 2021-12-06 16:05:10 -08:00
dst_cache.h wireguard: device: reset peer src endpoint when netns exits 2021-11-29 19:50:45 -08:00
dst_metadata.h net: allow storing xfrm interface metadata in metadata_dst 2022-08-29 10:38:19 +02:00
dst_ops.h
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erspan.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
esp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
espintcp.h
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ethoc.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
failover.h net: failover: add net device refcount tracker 2021-12-06 16:06:02 -08:00
fib_notifier.h
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fib_rules.h fib: expand fib_rule_policy 2021-12-16 07:18:35 -08:00
firewire.h firewire: net: Make use of get_unaligned_be48(), put_unaligned_be48() 2022-07-28 22:21:54 -07:00
flow.h net: Add l3mdev index to flow struct and avoid oif reset for port devices 2022-03-15 20:20:02 -07:00
flow_dissector.h flow_dissector: Add PPPoE dissectors 2022-07-26 09:49:12 -07:00
flow_offload.h flow_offload: Introduce flow_match_pppoe 2022-07-26 10:49:27 -07:00
fou.h
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fq.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
fq_impl.h net/fq_impl: Use the bitmap API to allocate bitmaps 2022-07-11 19:49:38 -07:00
garp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
gen_stats.h net: sched: Remove Qdisc::running sequence counter 2021-10-18 12:54:41 +01:00
genetlink.h net: add missing kdoc for struct genl_multicast_group::flags 2022-08-11 09:26:04 -07:00
geneve.h
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gre.h ip_gre: add csum offload support for gre header 2021-01-29 20:39:14 -08:00
gro.h net: gro: Fix a 'directive in macro's argument list' sparse warning 2022-02-18 11:00:25 +00:00
gro_cells.h
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gtp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
gue.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
hwbm.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
icmp.h ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages 2021-06-28 14:29:45 -07:00
ieee80211_radiotap.h ieee80211: radiotap: fix -Wcast-qual warnings 2022-02-04 16:25:21 +01:00
ieee802154_netdev.h
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if_inet6.h ipv6: fix locking issues with loops over idev->addr_list 2022-04-06 22:09:39 -07:00
ife.h
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ila.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet6_connection_sock.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet6_hashtables.h net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set 2022-07-29 11:58:54 +01:00
inet_common.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet_connection_sock.h Revert "tcp: change pingpong threshold to 3" 2022-07-22 15:09:10 -07:00
inet_dscp.h ipv6: Define dscp_t and stop taking ECN bits into account in fib6-rules 2022-02-07 20:12:45 -08:00
inet_ecn.h net: add skb_get_dsfield() helper 2021-10-15 11:33:08 +01:00
inet_frag.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
inet_hashtables.h net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set 2022-07-29 11:58:54 +01:00
inet_sock.h net: allow unbound socket for packets in VRF when tcp_l3mdev_accept set 2022-07-29 11:58:54 +01:00
inet_timewait_sock.h Revert "tcp/dccp: get rid of inet_twsk_purge()" 2022-05-13 12:24:12 +01:00
inetpeer.h
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ioam6.h treewide: Replace zero-length arrays with flexible-array members 2022-02-17 07:00:39 -06:00
ip.h ip: Fix data-races around sysctl_ip_prot_sock. 2022-07-20 10:14:49 +01:00
ip6_checksum.h net: move gro definitions to include/net/gro.h 2021-11-16 13:16:54 +00:00
ip6_fib.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-02-17 11:44:20 -08:00
ip6_route.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ip6_tunnel.h ip_gre, ip6_gre: Fix race condition on o_seqno in collect_md mode 2022-04-25 11:40:45 +01:00
ip_fib.h ipv4: Use dscp_t in struct fib_entry_notifier_info 2022-04-11 17:37:50 -07:00
ip_tunnels.h ip_tunnels: Add new flow flags field to ip_tunnel_key 2022-07-26 12:43:16 +02:00
ip_vs.h ipvs: add sysctl_run_estimation to support disable estimation 2021-10-07 19:52:58 +02:00
ipcomp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ipconfig.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ipv6.h ipv6: Fix signed integer overflow in __ip6_append_data 2022-06-08 10:56:43 -07:00
ipv6_frag.h net: don't include ndisc.h from ipv6.h 2022-02-04 14:15:11 -08:00
ipv6_stubs.h net: ipv6: add fib6_nh_release_dsts stub 2021-11-22 15:44:49 +00:00
iw_handler.h
…
kcm.h
…
l3mdev.h
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lag.h
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lapb.h net: lapb: Make "lapb_t1timer_running" able to detect an already running timer 2021-03-23 14:14:50 -07:00
lib80211.h
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llc.h llc: fix out-of-bound array index in llc_sk_dev_hash() 2021-11-07 19:25:29 +00:00
llc_c_ac.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_c_ev.h
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llc_c_st.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_conn.h llc: add net device refcount tracker 2021-12-07 20:44:59 -08:00
llc_if.h llc/snap: constify dev_addr passing 2021-10-13 09:40:46 -07:00
llc_pdu.h net: llc: fix skb_over_panic 2021-07-27 13:05:56 +01:00
llc_s_ac.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_s_ev.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
llc_s_st.h add missing includes and forward declarations to networking includes under linux/ 2022-07-28 11:29:36 +02:00
llc_sap.h
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lwtunnel.h netfilter: add netfilter hooks to SRv6 data plane 2021-08-30 01:51:36 +02:00
mac80211.h wifi: mac80211: add macros to loop over active links 2022-07-22 14:28:47 +02:00
mac802154.h net: mac802154: Create an error helper for asynchronous offloading errors 2022-04-25 20:51:12 +02:00
macsec.h net: macsec: fix the length used to copy the key for offloading 2021-06-24 12:41:12 -07:00
mctp.h mctp: Use output netdev to allocate skb headroom 2022-04-01 12:04:15 +01:00
mctpdevice.h mctp: Pass flow data & flow release events to drivers 2021-10-29 13:23:51 +01:00
mip6.h
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mld.h mld: add new workqueues for process mld events 2021-03-26 15:14:56 -07:00
mpls.h
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mpls_iptunnel.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
mptcp.h mptcp, btf: Add struct mptcp_sock definition when CONFIG_MPTCP is disabled 2022-08-08 15:30:45 +02:00
mrp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ncsi.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
ndisc.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-03-03 11:55:12 -08:00
neighbour.h net, neigh: introduce interval_probe_time_ms for periodic probe 2022-06-30 13:14:35 +02:00
net_debug.h net: add CONFIG_DEBUG_NET 2022-05-11 12:43:10 +01:00
net_failover.h
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net_namespace.h netfilter: nf_flow_table: count pending offload workqueue tasks 2022-07-11 16:25:14 +02:00
net_ratelimit.h
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net_trackers.h net: add networking namespace refcount tracker 2021-12-10 06:38:26 -08:00
netevent.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
netlabel.h
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netlink.h net: netlink: add the case when nlh is NULL 2021-07-27 11:43:50 +01:00
netprio_cgroup.h
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netrom.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
nexthop.h net: ipv4: Fix rtnexthop len when RTA_FLOW is present 2021-09-24 14:07:10 +01:00
nl802154.h net: ieee802154: handle iftypes as u32 2021-11-16 18:02:46 +01:00
nsh.h
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p8022.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
page_pool.h net: page_pool: introduce ethtool stats 2022-04-15 10:43:47 +01:00
pie.h
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ping.h net: remove noblock parameter from recvmsg() entities 2022-04-12 15:00:25 +02:00
pkt_cls.h net/sched: remove return value of unregister_tcf_proto_ops 2022-07-13 14:46:59 +01:00
pkt_sched.h net: sched: provide shim definitions for taprio_offload_{get,free} 2022-07-05 17:50:38 -07:00
pptp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
protocol.h tcp/udp: Make early_demux back namespacified. 2022-07-15 18:50:35 -07:00
psample.h psample: Add a fwd declaration for skbuff 2021-08-09 15:34:21 -07:00
psnap.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
raw.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-07-14 15:27:35 -07:00
rawv6.h raw: convert raw sockets to RCU 2022-06-19 10:00:02 +01:00
red.h sch_red: fix off-by-one checks in red_check_params() 2021-03-25 17:40:43 -07:00
regulatory.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
request_sock.h tcp: Use BPF timeout setting for SYN ACK RTO 2022-02-02 14:45:18 +00:00
rose.h net: rose: add netdev ref tracker to 'struct rose_sock' 2022-08-01 11:59:23 -07:00
route.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2022-07-25 13:25:39 +01:00
rpl.h
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rsi_91x.h
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rtnetlink.h net: rtnetlink: add bulk delete support flag 2022-04-13 12:46:26 +01:00
rtnh.h
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sch_generic.h net/sched: remove qdisc_root_lock() helper 2022-07-19 17:14:55 -07:00
scm.h
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secure_seq.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
seg6.h udp6: Use Segment Routing Header for dest address if present 2022-01-04 12:17:35 +00:00
seg6_hmac.h
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seg6_local.h
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selftests.h net: selftest: fix build issue if INET is disabled 2021-04-28 14:06:45 -07:00
slhc_vj.h
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smc.h net/smc: Pass on DMBE bit mask in IRQ handler 2022-07-27 13:24:42 +01:00
snmp.h
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sock.h net: fix refcount bug in sk_psock_get (2) 2022-08-10 21:47:58 -07:00
sock_reuseport.h tcp: Add reuseport_migrate_sock() to select a new listener. 2021-06-15 18:01:05 +02:00
stp.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
strparser.h tls: rx: remove the message decrypted tracking 2022-07-18 11:24:10 +01:00
switchdev.h net: switchdev: add reminder near struct switchdev_notifier_fdb_info 2022-06-29 20:37:36 -07:00
tcp.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-07-28 18:21:16 -07:00
tcp_states.h
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timewait_sock.h
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tipc.h
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tls.h net/tls: Use RCU API to access tls_ctx->netdev 2022-08-10 22:58:43 -07:00
tls_toe.h
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transp_v6.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
tso.h
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tun_proto.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
udp.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-07-21 13:03:39 -07:00
udp_tunnel.h udp: call udp_encap_enable for v6 sockets when enabling encap 2021-02-04 18:37:14 -08:00
udplite.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
vsock_addr.h
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vxlan.h drivers: vxlan: vnifilter: per vni stats 2022-03-01 08:38:02 +00:00
wext.h
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x25.h
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x25device.h
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xdp.h net: veth: Account total xdp_frame len running ndo_xdp_xmit 2022-03-17 20:33:52 +01:00
xdp_priv.h net: add missing includes and forward declarations under net/ 2022-07-22 12:53:22 +01:00
xdp_sock.h net: Don't include filter.h from net/sock.h 2021-12-29 08:48:14 -08:00
xdp_sock_drv.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-08-03 09:04:55 +02:00
xfrm.h xfrm: interface: support collect metadata mode 2022-08-29 10:41:28 +02:00
xsk_buff_pool.h xsk: Fix possible crash when multiple sockets are created 2022-04-26 16:19:54 +02:00