netdev - [PATCH iproute2-next 0/2] Support for the IOAM insertion frequency

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Message-Id: <20220205155208.22531-1-justin.iurman@uliege.be>
Date:   Sat,  5 Feb 2022 16:52:06 +0100
From:   Justin Iurman <justin.iurman@...ege.be>
To:     netdev@...r.kernel.org
Cc:     dsahern@...nel.org, stephen@...workplumber.org,
        justin.iurman@...ege.be
Subject: [PATCH iproute2-next 0/2] Support for the IOAM insertion frequency

This patchset requires an update of kernel headers:

diff --git a/include/uapi/linux/ioam6_iptunnel.h b/include/uapi/linux/ioam6_iptunnel.h
index 829ffdfcacca8..38f6a8fdfd343 100644
--- a/include/uapi/linux/ioam6_iptunnel.h
+++ b/include/uapi/linux/ioam6_iptunnel.h
@@ -41,6 +41,15 @@ enum {
 	/* IOAM Trace Header */
 	IOAM6_IPTUNNEL_TRACE,		/* struct ioam6_trace_hdr */
 
+	/* Insertion frequency:
+	 * "k over n" packets (0 < k <= n)
+	 * [0.0001% ... 100%]
+	 */
+#define IOAM6_IPTUNNEL_FREQ_MIN 1
+#define IOAM6_IPTUNNEL_FREQ_MAX 1000000
+	IOAM6_IPTUNNEL_FREQ_K,		/* u32 */
+	IOAM6_IPTUNNEL_FREQ_N,		/* u32 */
+
 	__IOAM6_IPTUNNEL_MAX,
 };

The insertion frequency is represented as "k/n", meaning IOAM will be
added to "k" packets over "n" packets, with 0 < k <= n <= 1000000.
Therefore, it provides the following range of insertion frequencies:
[0.0001% ... 100%].

Default frequency is "1/1" (i.e., applied to all packets) for backward
compatibility.

Previous command:
ip -6 ro ad fc00::1/128 encap ioam6 mode ...
    
New command:
ip -6 ro ad fc00::1/128 encap ioam6 [ freq k/n ] mode ...

Justin Iurman (2):
  Add support for the IOAM insertion frequency
  Update documentation

 ip/iproute_lwtunnel.c  | 69 ++++++++++++++++++++++++++++++++++++++++--
 man/man8/ip-route.8.in | 11 +++++--
 2 files changed, 75 insertions(+), 5 deletions(-)

-- 
2.25.1