| Message ID | 20210401182338.24077-1-justin.iurman@uliege.be (mailing list archive) |
|---|---|
| Headers | show |
| Series | Support for the IOAM Pre-allocated | expand |
I just noticed that the patchset title has been shortened, don't know what happened... sorry for that. The entire one is "Support for the IOAM Pre-allocated Trace with IPv6". > v3: > - Fix warning "unused label 'out_unregister_genl'" by adding conditional macro > - Fix lwtunnel output redirect bug: dst cache useless in this case, use > orig_output instead > > v2: > - Fix warning with static for __ioam6_fill_trace_data > - Fix sparse warning with __force when casting __be64 to __be32 > - Fix unchecked dereference when removing IOAM namespaces or schemas > - exthdrs.c: Don't drop by default (now: ignore) to match the act bits "00" > - Add control plane support for the inline insertion (lwtunnel) > - Provide uapi structures > - Use __net_timestamp if skb->tstamp is empty > - Add note about the temporary IANA allocation > - Remove support for "removable" TLVs > - Remove support for virtual/anonymous tunnel decapsulation > > In-situ Operations, Administration, and Maintenance (IOAM) records > operational and telemetry information in a packet while it traverses > a path between two points in an IOAM domain. It is defined in > draft-ietf-ippm-ioam-data [1]. IOAM data fields can be encapsulated > into a variety of protocols. The IPv6 encapsulation is defined in > draft-ietf-ippm-ioam-ipv6-options [2], via extension headers. IOAM > can be used to complement OAM mechanisms based on e.g. ICMP or other > types of probe packets. > > This patchset implements support for the Pre-allocated Trace, carried > by a Hop-by-Hop. Therefore, a new IPv6 Hop-by-Hop TLV option is > introduced, see IANA [3]. The three other IOAM options are not included > in this patchset (Incremental Trace, Proof-of-Transit and Edge-to-Edge). > The main idea behind the IOAM Pre-allocated Trace is that a node > pre-allocates some room in packets for IOAM data. Then, each IOAM node > on the path will insert its data. There exist several interesting use- > cases, e.g. Fast failure detection/isolation or Smart service selection. > Another killer use-case is what we have called Cross-Layer Telemetry, > see the demo video on its repository [4], that aims to make the entire > stack (L2/L3 -> L7) visible for distributed tracing tools (e.g. Jaeger), > instead of the current L5 -> L7 limited view. So, basically, this is a > nice feature for the Linux Kernel. > > This patchset also provides support for the control plane part, but only for the > inline insertion (host-to-host use case), through lightweight tunnels. Indeed, > for in-transit traffic, the solution is to have an IPv6-in-IPv6 encapsulation, > which brings some difficulties and still requires a little bit of work and > discussion (ie anonymous tunnel decapsulation and multi egress resolution). > > - Patch 1: IPv6 IOAM headers definition > - Patch 2: Data plane support for Pre-allocated Trace > - Patch 3: IOAM Generic Netlink API > - Patch 4: Support for IOAM injection with lwtunnels > - Patch 5: Documentation for new IOAM sysctls > > [1] https://tools.ietf.org/html/draft-ietf-ippm-ioam-data > [2] https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options > [3] > https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml#ipv6-parameters-2 > [4] https://github.com/iurmanj/cross-layer-telemetry > > Justin Iurman (5): > uapi: IPv6 IOAM headers definition > ipv6: ioam: Data plane support for Pre-allocated Trace > ipv6: ioam: IOAM Generic Netlink API > ipv6: ioam: Support for IOAM injection with lwtunnels > ipv6: ioam: Documentation for new IOAM sysctls > > Documentation/networking/ioam6-sysctl.rst | 20 + > Documentation/networking/ip-sysctl.rst | 5 + > include/linux/ioam6.h | 13 + > include/linux/ioam6_genl.h | 13 + > include/linux/ioam6_iptunnel.h | 13 + > include/linux/ipv6.h | 2 + > include/net/ioam6.h | 65 ++ > include/net/netns/ipv6.h | 2 + > include/uapi/linux/in6.h | 1 + > include/uapi/linux/ioam6.h | 124 +++ > include/uapi/linux/ioam6_genl.h | 49 ++ > include/uapi/linux/ioam6_iptunnel.h | 19 + > include/uapi/linux/ipv6.h | 2 + > include/uapi/linux/lwtunnel.h | 1 + > net/core/lwtunnel.c | 2 + > net/ipv6/Kconfig | 11 + > net/ipv6/Makefile | 3 +- > net/ipv6/addrconf.c | 20 + > net/ipv6/af_inet6.c | 7 + > net/ipv6/exthdrs.c | 51 ++ > net/ipv6/ioam6.c | 872 ++++++++++++++++++++++ > net/ipv6/ioam6_iptunnel.c | 273 +++++++ > net/ipv6/sysctl_net_ipv6.c | 7 + > 23 files changed, 1574 insertions(+), 1 deletion(-) > create mode 100644 Documentation/networking/ioam6-sysctl.rst > create mode 100644 include/linux/ioam6.h > create mode 100644 include/linux/ioam6_genl.h > create mode 100644 include/linux/ioam6_iptunnel.h > create mode 100644 include/net/ioam6.h > create mode 100644 include/uapi/linux/ioam6.h > create mode 100644 include/uapi/linux/ioam6_genl.h > create mode 100644 include/uapi/linux/ioam6_iptunnel.h > create mode 100644 net/ipv6/ioam6.c > create mode 100644 net/ipv6/ioam6_iptunnel.c > > -- > 2.17.1