OpenCloudOS-Kernel/include/linux/ioam6.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 *  IPv6 IOAM
 *
 *  Author:
 *  Justin Iurman <justin.iurman@uliege.be>
 */
#ifndef _LINUX_IOAM6_H
#define _LINUX_IOAM6_H

#include <uapi/linux/ioam6.h>

#endif /* _LINUX_IOAM6_H */
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 03:42:57 +08:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
			`/*`
			`* IPv6 IOAM`
			`*`
			`* Author:`
			`* Justin Iurman <justin.iurman@uliege.be>`
			`*/`
			`#ifndef _LINUX_IOAM6_H`
			`#define _LINUX_IOAM6_H`

			`#include <uapi/linux/ioam6.h>`

			`#endif /* _LINUX_IOAM6_H */`