Jacques de Laval 47f0bd5032 net: Add new protocol attribute to IP addresses ... This patch adds a new protocol attribute to IPv4 and IPv6 addresses. Inspiration was taken from the protocol attribute of routes. User space applications like iproute2 can set/get the protocol with the Netlink API. The attribute is stored as an 8-bit unsigned integer. The protocol attribute is set by kernel for these categories: - IPv4 and IPv6 loopback addresses - IPv6 addresses generated from router announcements - IPv6 link local addresses User space may pass custom protocols, not defined by the kernel. Grouping addresses on their origin is useful in scenarios where you want to distinguish between addresses based on who added them, e.g. kernel vs. user space. Tagging addresses with a string label is an existing feature that could be used as a solution. Unfortunately the max length of a label is 15 characters, and for compatibility reasons the label must be prefixed with the name of the device followed by a colon. Since device names also have a max length of 15 characters, only -1 characters is guaranteed to be available for any origin tag, which is not that much. A reference implementation of user space setting and getting protocols is available for iproute2: 9a6ea18bd7 Signed-off-by: Jacques de Laval <Jacques.De.Laval@westermo.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20220217150202.80802-1-Jacques.De.Laval@westermo.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2022-02-18 21:20:06 -08:00
..
ila	net: ipv6: check return value of rhashtable_init	2021-09-28 12:59:24 +01:00
netfilter	netfilter: Remove flowtable relics	2022-01-27 00:00:20 +01:00
addrconf_core.c	ipv6: add net device refcount tracker to struct inet6_dev	2021-12-06 16:05:11 -08:00
addrconf.c	net: Add new protocol attribute to IP addresses	2022-02-18 21:20:06 -08:00
addrlabel.c	ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init	2020-11-25 11:20:16 -08:00
af_inet6.c	ipv6: annotate some data-races around sk->sk_prot	2022-02-18 11:53:28 +00:00
ah6.c	ipv6: ah6: use swap() to make code cleaner	2021-11-18 12:00:15 +00:00
anycast.c	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-07-30 16:30:55 -07:00
calipso.c	cipso,calipso: resolve a number of problems with the DOI refcounts	2021-03-04 15:26:57 -08:00
datagram.c	lsm,selinux: pass flowi_common instead of flowi to the LSM hooks	2020-11-23 18:36:21 -05:00
esp6_offload.c	net: move gro definitions to include/net/gro.h	2021-11-16 13:16:54 +00:00
esp6.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2022-01-06 11:54:20 +00:00
exthdrs_core.c
exthdrs_offload.c
exthdrs.c	ipv6: partially inline ipv6_fixup_options	2022-01-27 19:46:11 -08:00
fib6_notifier.c
fib6_rules.c	ipv6: change fib6_rules_net_exit() to batch mode	2022-02-08 20:41:34 -08:00
fou6.c	net: Add MODULE_DESCRIPTION entries to network modules	2020-06-20 21:33:57 -07:00
icmp.c	ipv6: do not use per netns icmp sockets	2022-01-25 11:25:21 +00:00
inet6_connection_sock.c	lsm,selinux: pass flowi_common instead of flowi to the LSM hooks	2020-11-23 18:36:21 -05:00
inet6_hashtables.c	tcp: Don't acquire inet_listen_hashbucket::lock with disabled BH.	2022-02-09 21:28:36 -08:00
ioam6_iptunnel.c	ipv6: ioam: Insertion frequency in lwtunnel output	2022-02-04 20:24:45 -08:00
ioam6.c	ipv6: ioam: Support for Queue depth data field	2022-01-02 12:15:13 +00:00
ip6_checksum.c
ip6_fib.c	ipv6: annotate accesses to fn->fn_sernum	2022-01-20 20:18:37 -08:00
ip6_flowlabel.c	ipv6: per-netns exclusive flowlabel checks	2022-02-16 20:37:47 -08:00
ip6_gre.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-09 17:00:17 -08:00
ip6_icmp.c	net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending	2021-02-23 11:29:52 -08:00
ip6_input.c	ipv6: make mc_forwarding atomic	2022-02-05 15:20:34 +00:00
ip6_offload.c	ipv6: gro: flush instead of assuming different flows on hop_limit mismatch	2022-01-25 13:05:11 +00:00
ip6_offload.h
ip6_output.c	net: ping6: support setting basic SOL_IPV6 options via cmsg	2022-02-17 14:22:09 +00:00
ip6_tunnel.c	ip6_tunnel: fix possible NULL deref in ip6_tnl_xmit	2022-02-09 11:56:19 +00:00
ip6_udp_tunnel.c	net: Make locking in sock_bindtoindex optional	2020-06-01 14:57:14 -07:00
ip6_vti.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-12-30 12:12:12 -08:00
ip6mr.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-02-10 17:29:56 -08:00
ipcomp6.c	xfrm: remove hdr_offset indirection	2021-06-11 14:48:50 +02:00
ipv6_sockglue.c	ipv6: annotate some data-races around sk->sk_prot	2022-02-18 11:53:28 +00:00
Kconfig	ipv6: ioam: Add support for the ip6ip6 encapsulation	2021-10-04 12:53:35 +01:00
Makefile	net: ipv6: use ipv6-y directly instead of ipv6-objs	2021-09-28 13:13:40 +01:00
mcast_snoop.c	net: bridge: mcast: fix broken length + header check for MRDv6 Adv.	2021-04-27 14:02:06 -07:00
mcast.c	ipv6: mcast: use rcu-safe version of ipv6_get_lladdr()	2022-02-14 13:30:37 +00:00
mip6.c	xfrm: ipv6: move mip6_rthdr_offset into xfrm core	2021-06-11 14:48:50 +02:00
ndisc.c	Generate netlink notification when default IPv6 route preference changes	2022-02-14 11:15:37 +00:00
netfilter.c	netfilter: Dissect flow after packet mangling	2021-04-18 22:04:16 +02:00
output_core.c	ipv6: use prandom_u32() for ID generation	2021-05-31 22:12:08 -07:00
ping.c	net: ping6: support setting basic SOL_IPV6 options via cmsg	2022-02-17 14:22:09 +00:00
proc.c	net: udp: introduce UDP_MIB_MEMERRORS for udp_mem	2020-11-09 15:34:44 -08:00
protocol.c
raw.c	ipv6: raw: check passed optlen before reading	2021-12-29 12:32:56 -08:00
reassembly.c	ipv6: record frag_max_size in atomic fragments in input path	2021-05-21 15:02:25 -07:00
route.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-02-17 11:44:20 -08:00
rpl_iptunnel.c	net: ipv6: rpl_iptunnel: simplify the return expression of rpl_do_srh()	2020-12-08 16:22:54 -08:00
rpl.c	net: ipv6: rpl*: Fix strange kerneldoc warnings due to bad header	2020-10-30 12:12:52 -07:00
seg6_hmac.c	net: ipv6: check return value of rhashtable_init	2021-09-28 12:59:24 +01:00
seg6_iptunnel.c	seg6: fix the iif in the IPv6 socket control block	2021-12-09 07:55:42 -08:00
seg6_local.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
seg6.c	icmp: ICMPV6: Examine invoking packet for Segment Route Headers.	2022-01-04 12:17:35 +00:00
sit.c	sit: allow encapsulated IPv6 traffic to be delivered locally	2022-01-12 13:56:07 -08:00
syncookies.c	net: align static siphash keys	2021-11-16 19:07:54 -08:00
sysctl_net_ipv6.c	ipv6: ioam: Data plane support for Pre-allocated Trace	2021-07-21 08:14:33 -07:00
tcp_ipv6.c	tcp: allocate tcp_death_row outside of struct netns_ipv4	2022-01-26 19:00:31 -08:00
tcpv6_offload.c	net: move gro definitions to include/net/gro.h	2021-11-16 13:16:54 +00:00
tunnel6.c	tunnel6: add tunnel6_input_afinfo for ipip and ipv6 tunnels	2020-07-09 12:52:37 +02:00
udp_impl.h	net: pass a sockptr_t into ->setsockopt	2020-07-24 15:41:54 -07:00
udp_offload.c	gro: remove rcu_read_lock/rcu_read_unlock from gro_receive handlers	2021-11-24 17:21:42 -08:00
udp.c	ipv6: Add reasons for skb drops to __udp6_lib_rcv	2022-02-14 11:24:39 +00:00
udplite.c	net/ipv6: remove compat_ipv6_{get,set}sockopt	2020-07-19 18:16:41 -07:00
xfrm6_input.c	xfrm: state: remove extract_input indirection from xfrm_state_afinfo	2020-05-06 09:40:08 +02:00
xfrm6_output.c	net: ipv6: fix return value of ip6_skb_dst_mtu	2021-07-02 11:57:01 -07:00
xfrm6_policy.c	ipv6: get rid of net->ipv6.rt6_stats->fib_rt_uncache	2022-02-11 11:44:27 +00:00
xfrm6_protocol.c	xfrm: add support for UDPv6 encapsulation of ESP	2020-04-28 11:28:36 +02:00
xfrm6_state.c	xfrm: remove output_finish indirection from xfrm_state_afinfo	2020-05-06 09:40:08 +02:00
xfrm6_tunnel.c	xfrm: remove description from xfrm_type struct	2021-06-09 09:38:52 +02:00