Justin Iurman 9ee11f0fff ipv6: ioam: Data plane support for Pre-allocated Trace ... Implement support for processing the IOAM Pre-allocated Trace with IPv6, see [1] and [2]. Introduce a new IPv6 Hop-by-Hop TLV option, see IANA [3]. A new per-interface sysctl is introduced. The value is a boolean to accept (=1) or ignore (=0, by default) IPv6 IOAM options on ingress for an interface: - net.ipv6.conf.XXX.ioam6_enabled Two other sysctls are introduced to define IOAM IDs, represented by an integer. They are respectively per-namespace and per-interface: - net.ipv6.ioam6_id - net.ipv6.conf.XXX.ioam6_id The value of the first one represents the IOAM ID of the node itself (u32; max and default value = U32_MAX>>8, due to hop limit concatenation) while the other represents the IOAM ID of an interface (u16; max and default value = U16_MAX). Each "ioam6_id" sysctl has a "_wide" equivalent: - net.ipv6.ioam6_id_wide - net.ipv6.conf.XXX.ioam6_id_wide The value of the first one represents the wide IOAM ID of the node itself (u64; max and default value = U64_MAX>>8, due to hop limit concatenation) while the other represents the wide IOAM ID of an interface (u32; max and default value = U32_MAX). The use of short and wide equivalents is not exclusive, a deployment could choose to leverage both. For example, net.ipv6.conf.XXX.ioam6_id (short format) could be an identifier for a physical interface, whereas net.ipv6.conf.XXX.ioam6_id_wide (wide format) could be an identifier for a logical sub-interface. Documentation about new sysctls is provided at the end of this patchset. Two relativistic hash tables are used: one for IOAM namespaces, the other for IOAM schemas. A namespace can only have a single active schema and a schema can only be attached to a single namespace (1:1 relationship). [1] https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options [2] https://tools.ietf.org/html/draft-ietf-ippm-ioam-data [3] https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml#ipv6-parameters-2 Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-07-21 08:14:33 -07:00
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bpf.h	bpf, netns: Keep a list of attached bpf_link's	2020-06-30 10:45:08 -07:00
can.h	can: remove obsolete version strings	2020-10-12 10:06:39 +02:00
conntrack.h	netfilter: conntrack: add new sysctl to disable RST check	2021-07-06 14:15:12 +02:00
core.h
generic.h
hash.h
ieee802154_6lowpan.h
ipv4.h	net/tcp_fastopen: remove tcp_fastopen_ctx_lock	2021-07-20 12:07:07 +02:00
ipv6.h	ipv6: ioam: Data plane support for Pre-allocated Trace	2021-07-21 08:14:33 -07:00
mib.h	net: reorganize fields in netns_mib	2021-04-02 14:31:44 -07:00
mpls.h
netfilter.h	net: remove obsolete members from struct net	2021-04-06 00:34:53 +02:00
nexthop.h	nexthop: Convert to blocking notification chain	2020-09-15 16:31:17 -07:00
nftables.h	net: remove obsolete members from struct net	2021-04-06 00:34:53 +02:00
packet.h
sctp.h	sctp: add probe_interval in sysctl and sock/asoc/transport	2021-06-22 11:28:51 -07:00
smc.h	net/smc: Make SMC statistics network namespace aware	2021-06-16 12:54:02 -07:00
unix.h
x_tables.h	netfilter: ebtables: remove the 3 ebtables pointers from struct net	2021-04-26 03:20:07 +02:00
xdp.h
xfrm.h	xfrm: add state hashtable keyed by seq	2021-05-14 13:52:01 +02:00