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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>
This commit is contained in:
Justin Iurman 2021-07-20 21:42:57 +02:00 committed by David S. Miller
parent db67f219fc
commit 9ee11f0fff
13 changed files with 557 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
include/linux/ioam6.h Normal file
View File

@ -0,0 +1,13 @@
/* 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 */

3
include/linux/ipv6.h
View File

@ -76,6 +76,9 @@ struct ipv6_devconf {
__s32 disable_policy;
__s32 ndisc_tclass;
__s32 rpl_seg_enabled;
__u32 ioam6_id;
__u32 ioam6_id_wide;
__u8 ioam6_enabled;
struct ctl_table_header *sysctl_header;
};

64
include/net/ioam6.h Normal file
View File

@ -0,0 +1,64 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* IPv6 IOAM implementation
*
* Author:
* Justin Iurman <justin.iurman@uliege.be>
*/
#ifndef _NET_IOAM6_H
#define _NET_IOAM6_H
#include <linux/net.h>
#include <linux/ipv6.h>
#include <linux/ioam6.h>
#include <linux/rhashtable-types.h>
struct ioam6_namespace {
struct rhash_head head;
struct rcu_head rcu;
struct ioam6_schema __rcu *schema;
__be16 id;
__be32 data;
__be64 data_wide;
};
struct ioam6_schema {
struct rhash_head head;
struct rcu_head rcu;
struct ioam6_namespace __rcu *ns;
u32 id;
int len;
__be32 hdr;
u8 data[0];
};
struct ioam6_pernet_data {
struct mutex lock;
struct rhashtable namespaces;
struct rhashtable schemas;
};
static inline struct ioam6_pernet_data *ioam6_pernet(struct net *net)
{
#if IS_ENABLED(CONFIG_IPV6)
return net->ipv6.ioam6_data;
#else
return NULL;
#endif
}
struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id);
void ioam6_fill_trace_data(struct sk_buff *skb,
struct ioam6_namespace *ns,
struct ioam6_trace_hdr *trace);
int ioam6_init(void);
void ioam6_exit(void);
#endif /* _NET_IOAM6_H */

3
include/net/netns/ipv6.h
View File

@ -51,6 +51,8 @@ struct netns_sysctl_ipv6 {
int max_dst_opts_len;
int max_hbh_opts_len;
int seg6_flowlabel;
u32 ioam6_id;
u64 ioam6_id_wide;
bool skip_notify_on_dev_down;
u8 fib_notify_on_flag_change;
};
@ -110,6 +112,7 @@ struct netns_ipv6 {
spinlock_t lock;
u32 seq;
} ip6addrlbl_table;
struct ioam6_pernet_data *ioam6_data;
};
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)

1
include/uapi/linux/in6.h
View File

@ -145,6 +145,7 @@ struct in6_flowlabel_req {
#define IPV6_TLV_PADN 1
#define IPV6_TLV_ROUTERALERT 5
#define IPV6_TLV_CALIPSO 7 /* RFC 5570 */
#define IPV6_TLV_IOAM 49 /* TEMPORARY IANA allocation for IOAM */
#define IPV6_TLV_JUMBO 194
#define IPV6_TLV_HAO 201 /* home address option */

9
include/uapi/linux/ioam6.h
View File

@ -12,6 +12,15 @@
#include <asm/byteorder.h>
#include <linux/types.h>
#define IOAM6_U16_UNAVAILABLE U16_MAX
#define IOAM6_U32_UNAVAILABLE U32_MAX
#define IOAM6_U64_UNAVAILABLE U64_MAX
#define IOAM6_DEFAULT_ID (IOAM6_U32_UNAVAILABLE >> 8)
#define IOAM6_DEFAULT_ID_WIDE (IOAM6_U64_UNAVAILABLE >> 8)
#define IOAM6_DEFAULT_IF_ID IOAM6_U16_UNAVAILABLE
#define IOAM6_DEFAULT_IF_ID_WIDE IOAM6_U32_UNAVAILABLE
/*
* IPv6 IOAM Option Header
*/

3
include/uapi/linux/ipv6.h
View File

@ -190,6 +190,9 @@ enum {
DEVCONF_NDISC_TCLASS,
DEVCONF_RPL_SEG_ENABLED,
DEVCONF_RA_DEFRTR_METRIC,
DEVCONF_IOAM6_ENABLED,
DEVCONF_IOAM6_ID,
DEVCONF_IOAM6_ID_WIDE,
DEVCONF_MAX
};

2
net/ipv6/Makefile
View File

@ -10,7 +10,7 @@ ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \
raw.o icmp.o mcast.o reassembly.o tcp_ipv6.o ping.o \
exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o \
udp_offload.o seg6.o fib6_notifier.o rpl.o
udp_offload.o seg6.o fib6_notifier.o rpl.o ioam6.o
ipv6-offload := ip6_offload.o tcpv6_offload.o exthdrs_offload.o

37
net/ipv6/addrconf.c
View File

@ -89,12 +89,15 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.h>
#include <linux/ioam6.h>
#define INFINITY_LIFE_TIME 0xFFFFFFFF
#define IPV6_MAX_STRLEN \
sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")
static u32 ioam6_if_id_max = U16_MAX;
static inline u32 cstamp_delta(unsigned long cstamp)
{
return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
@ -237,6 +240,9 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
.addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64,
.disable_policy = 0,
.rpl_seg_enabled = 0,
.ioam6_enabled = 0,
.ioam6_id = IOAM6_DEFAULT_IF_ID,
.ioam6_id_wide = IOAM6_DEFAULT_IF_ID_WIDE,
};
static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@ -293,6 +299,9 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
.addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64,
.disable_policy = 0,
.rpl_seg_enabled = 0,
.ioam6_enabled = 0,
.ioam6_id = IOAM6_DEFAULT_IF_ID,
.ioam6_id_wide = IOAM6_DEFAULT_IF_ID_WIDE,
};
/* Check if link is ready: is it up and is a valid qdisc available */
@ -5524,6 +5533,9 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy;
array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass;
array[DEVCONF_RPL_SEG_ENABLED] = cnf->rpl_seg_enabled;
array[DEVCONF_IOAM6_ENABLED] = cnf->ioam6_enabled;
array[DEVCONF_IOAM6_ID] = cnf->ioam6_id;
array[DEVCONF_IOAM6_ID_WIDE] = cnf->ioam6_id_wide;
}
static inline size_t inet6_ifla6_size(void)
@ -6930,6 +6942,31 @@ static const struct ctl_table addrconf_sysctl[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "ioam6_enabled",
.data = &ipv6_devconf.ioam6_enabled,
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dou8vec_minmax,
.extra1 = (void *)SYSCTL_ZERO,
.extra2 = (void *)SYSCTL_ONE,
},
{
.procname = "ioam6_id",
.data = &ipv6_devconf.ioam6_id,
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_douintvec_minmax,
.extra1 = (void *)SYSCTL_ZERO,
.extra2 = (void *)&ioam6_if_id_max,
},
{
.procname = "ioam6_id_wide",
.data = &ipv6_devconf.ioam6_id_wide,
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_douintvec,
},
{
/* sentinel */
}

10
net/ipv6/af_inet6.c
View File

@ -62,6 +62,7 @@
#include <net/rpl.h>
#include <net/compat.h>
#include <net/xfrm.h>
#include <net/ioam6.h>
#include <linux/uaccess.h>
#include <linux/mroute6.h>
@ -961,6 +962,9 @@ static int __net_init inet6_net_init(struct net *net)
net->ipv6.sysctl.fib_notify_on_flag_change = 0;
atomic_set(&net->ipv6.fib6_sernum, 1);
net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
err = ipv6_init_mibs(net);
if (err)
return err;
@ -1191,6 +1195,10 @@ static int __init inet6_init(void)
if (err)
goto rpl_fail;
err = ioam6_init();
if (err)
goto ioam6_fail;
err = igmp6_late_init();
if (err)
goto igmp6_late_err;
@ -1213,6 +1221,8 @@ sysctl_fail:
igmp6_late_cleanup();
#endif
igmp6_late_err:
ioam6_exit();
ioam6_fail:
rpl_exit();
rpl_fail:
seg6_exit();

61
net/ipv6/exthdrs.c
View File

@ -49,6 +49,9 @@
#include <net/seg6_hmac.h>
#endif
#include <net/rpl.h>
#include <linux/ioam6.h>
#include <net/ioam6.h>
#include <net/dst_metadata.h>
#include <linux/uaccess.h>
@ -928,6 +931,60 @@ static bool ipv6_hop_ra(struct sk_buff *skb, int optoff)
return false;
}
/* IOAM */
static bool ipv6_hop_ioam(struct sk_buff *skb, int optoff)
{
struct ioam6_trace_hdr *trace;
struct ioam6_namespace *ns;
struct ioam6_hdr *hdr;
/* Bad alignment (must be 4n-aligned) */
if (optoff & 3)
goto drop;
/* Ignore if IOAM is not enabled on ingress */
if (!__in6_dev_get(skb->dev)->cnf.ioam6_enabled)
goto ignore;
/* Truncated Option header */
hdr = (struct ioam6_hdr *)(skb_network_header(skb) + optoff);
if (hdr->opt_len < 2)
goto drop;
switch (hdr->type) {
case IOAM6_TYPE_PREALLOC:
/* Truncated Pre-allocated Trace header */
if (hdr->opt_len < 2 + sizeof(*trace))
goto drop;
/* Malformed Pre-allocated Trace header */
trace = (struct ioam6_trace_hdr *)((u8 *)hdr + sizeof(*hdr));
if (hdr->opt_len < 2 + sizeof(*trace) + trace->remlen * 4)
goto drop;
/* Ignore if the IOAM namespace is unknown */
ns = ioam6_namespace(ipv6_skb_net(skb), trace->namespace_id);
if (!ns)
goto ignore;
if (!skb_valid_dst(skb))
ip6_route_input(skb);
ioam6_fill_trace_data(skb, ns, trace);
break;
default:
break;
}
ignore:
return true;
drop:
kfree_skb(skb);
return false;
}
/* Jumbo payload */
static bool ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
@ -999,6 +1056,10 @@ static const struct tlvtype_proc tlvprochopopt_lst[] = {
.type = IPV6_TLV_ROUTERALERT,
.func = ipv6_hop_ra,
},
{
.type = IPV6_TLV_IOAM,
.func = ipv6_hop_ioam,
},
{
.type = IPV6_TLV_JUMBO,
.func = ipv6_hop_jumbo,

333
net/ipv6/ioam6.c Normal file
View File

@ -0,0 +1,333 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* IPv6 IOAM implementation
*
* Author:
* Justin Iurman <justin.iurman@uliege.be>
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/net.h>
#include <linux/ioam6.h>
#include <linux/rhashtable.h>
#include <net/addrconf.h>
#include <net/ioam6.h>
static void ioam6_ns_release(struct ioam6_namespace *ns)
{
kfree_rcu(ns, rcu);
}
static void ioam6_sc_release(struct ioam6_schema *sc)
{
kfree_rcu(sc, rcu);
}
static void ioam6_free_ns(void *ptr, void *arg)
{
struct ioam6_namespace *ns = (struct ioam6_namespace *)ptr;
if (ns)
ioam6_ns_release(ns);
}
static void ioam6_free_sc(void *ptr, void *arg)
{
struct ioam6_schema *sc = (struct ioam6_schema *)ptr;
if (sc)
ioam6_sc_release(sc);
}
static int ioam6_ns_cmpfn(struct rhashtable_compare_arg *arg, const void *obj)
{
const struct ioam6_namespace *ns = obj;
return (ns->id != *(__be16 *)arg->key);
}
static int ioam6_sc_cmpfn(struct rhashtable_compare_arg *arg, const void *obj)
{
const struct ioam6_schema *sc = obj;
return (sc->id != *(u32 *)arg->key);
}
static const struct rhashtable_params rht_ns_params = {
.key_len = sizeof(__be16),
.key_offset = offsetof(struct ioam6_namespace, id),
.head_offset = offsetof(struct ioam6_namespace, head),
.automatic_shrinking = true,
.obj_cmpfn = ioam6_ns_cmpfn,
};
static const struct rhashtable_params rht_sc_params = {
.key_len = sizeof(u32),
.key_offset = offsetof(struct ioam6_schema, id),
.head_offset = offsetof(struct ioam6_schema, head),
.automatic_shrinking = true,
.obj_cmpfn = ioam6_sc_cmpfn,
};
struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id)
{
struct ioam6_pernet_data *nsdata = ioam6_pernet(net);
return rhashtable_lookup_fast(&nsdata->namespaces, &id, rht_ns_params);
}
static void __ioam6_fill_trace_data(struct sk_buff *skb,
struct ioam6_namespace *ns,
struct ioam6_trace_hdr *trace,
struct ioam6_schema *sc,
u8 sclen)
{
struct __kernel_sock_timeval ts;
u64 raw64;
u32 raw32;
u16 raw16;
u8 *data;
u8 byte;
data = trace->data + trace->remlen * 4 - trace->nodelen * 4 - sclen * 4;
/* hop_lim and node_id */
if (trace->type.bit0) {
byte = ipv6_hdr(skb)->hop_limit;
if (skb->dev)
byte--;
raw32 = dev_net(skb->dev)->ipv6.sysctl.ioam6_id;
*(__be32 *)data = cpu_to_be32((byte << 24) | raw32);
data += sizeof(__be32);
}
/* ingress_if_id and egress_if_id */
if (trace->type.bit1) {
if (!skb->dev)
raw16 = IOAM6_U16_UNAVAILABLE;
else
raw16 = (__force u16)__in6_dev_get(skb->dev)->cnf.ioam6_id;
*(__be16 *)data = cpu_to_be16(raw16);
data += sizeof(__be16);
if (skb_dst(skb)->dev->flags & IFF_LOOPBACK)
raw16 = IOAM6_U16_UNAVAILABLE;
else
raw16 = (__force u16)__in6_dev_get(skb_dst(skb)->dev)->cnf.ioam6_id;
*(__be16 *)data = cpu_to_be16(raw16);
data += sizeof(__be16);
}
/* timestamp seconds */
if (trace->type.bit2) {
if (!skb->tstamp)
__net_timestamp(skb);
skb_get_new_timestamp(skb, &ts);
*(__be32 *)data = cpu_to_be32((u32)ts.tv_sec);
data += sizeof(__be32);
}
/* timestamp subseconds */
if (trace->type.bit3) {
if (!skb->tstamp)
__net_timestamp(skb);
if (!trace->type.bit2)
skb_get_new_timestamp(skb, &ts);
*(__be32 *)data = cpu_to_be32((u32)ts.tv_usec);
data += sizeof(__be32);
}
/* transit delay */
if (trace->type.bit4) {
*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
data += sizeof(__be32);
}
/* namespace data */
if (trace->type.bit5) {
*(__be32 *)data = ns->data;
data += sizeof(__be32);
}
/* queue depth */
if (trace->type.bit6) {
*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
data += sizeof(__be32);
}
/* checksum complement */
if (trace->type.bit7) {
*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
data += sizeof(__be32);
}
/* hop_lim and node_id (wide) */
if (trace->type.bit8) {
byte = ipv6_hdr(skb)->hop_limit;
if (skb->dev)
byte--;
raw64 = dev_net(skb->dev)->ipv6.sysctl.ioam6_id_wide;
*(__be64 *)data = cpu_to_be64(((u64)byte << 56) | raw64);
data += sizeof(__be64);
}
/* ingress_if_id and egress_if_id (wide) */
if (trace->type.bit9) {
if (!skb->dev)
raw32 = IOAM6_U32_UNAVAILABLE;
else
raw32 = __in6_dev_get(skb->dev)->cnf.ioam6_id_wide;
*(__be32 *)data = cpu_to_be32(raw32);
data += sizeof(__be32);
if (skb_dst(skb)->dev->flags & IFF_LOOPBACK)
raw32 = IOAM6_U32_UNAVAILABLE;
else
raw32 = __in6_dev_get(skb_dst(skb)->dev)->cnf.ioam6_id_wide;
*(__be32 *)data = cpu_to_be32(raw32);
data += sizeof(__be32);
}
/* namespace data (wide) */
if (trace->type.bit10) {
*(__be64 *)data = ns->data_wide;
data += sizeof(__be64);
}
/* buffer occupancy */
if (trace->type.bit11) {
*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
data += sizeof(__be32);
}
/* opaque state snapshot */
if (trace->type.bit22) {
if (!sc) {
*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE >> 8);
} else {
*(__be32 *)data = sc->hdr;
data += sizeof(__be32);
memcpy(data, sc->data, sc->len);
}
}
}
/* called with rcu_read_lock() */
void ioam6_fill_trace_data(struct sk_buff *skb,
struct ioam6_namespace *ns,
struct ioam6_trace_hdr *trace)
{
struct ioam6_schema *sc;
u8 sclen = 0;
/* Skip if Overflow flag is set OR
* if an unknown type (bit 12-21) is set
*/
if (trace->overflow ||
trace->type.bit12 | trace->type.bit13 | trace->type.bit14 |
trace->type.bit15 | trace->type.bit16 | trace->type.bit17 |
trace->type.bit18 | trace->type.bit19 | trace->type.bit20 |
trace->type.bit21) {
return;
}
/* NodeLen does not include Opaque State Snapshot length. We need to
* take it into account if the corresponding bit is set (bit 22) and
* if the current IOAM namespace has an active schema attached to it
*/
sc = rcu_dereference(ns->schema);
if (trace->type.bit22) {
sclen = sizeof_field(struct ioam6_schema, hdr) / 4;
if (sc)
sclen += sc->len / 4;
}
/* If there is no space remaining, we set the Overflow flag and we
* skip without filling the trace
*/
if (!trace->remlen || trace->remlen < trace->nodelen + sclen) {
trace->overflow = 1;
return;
}
__ioam6_fill_trace_data(skb, ns, trace, sc, sclen);
trace->remlen -= trace->nodelen + sclen;
}
static int __net_init ioam6_net_init(struct net *net)
{
struct ioam6_pernet_data *nsdata;
int err = -ENOMEM;
nsdata = kzalloc(sizeof(*nsdata), GFP_KERNEL);
if (!nsdata)
goto out;
mutex_init(&nsdata->lock);
net->ipv6.ioam6_data = nsdata;
err = rhashtable_init(&nsdata->namespaces, &rht_ns_params);
if (err)
goto free_nsdata;
err = rhashtable_init(&nsdata->schemas, &rht_sc_params);
if (err)
goto free_rht_ns;
out:
return err;
free_rht_ns:
rhashtable_destroy(&nsdata->namespaces);
free_nsdata:
kfree(nsdata);
net->ipv6.ioam6_data = NULL;
goto out;
}
static void __net_exit ioam6_net_exit(struct net *net)
{
struct ioam6_pernet_data *nsdata = ioam6_pernet(net);
rhashtable_free_and_destroy(&nsdata->namespaces, ioam6_free_ns, NULL);
rhashtable_free_and_destroy(&nsdata->schemas, ioam6_free_sc, NULL);
kfree(nsdata);
}
static struct pernet_operations ioam6_net_ops = {
.init = ioam6_net_init,
.exit = ioam6_net_exit,
};
int __init ioam6_init(void)
{
int err = register_pernet_subsys(&ioam6_net_ops);
if (err)
return err;
pr_info("In-situ OAM (IOAM) with IPv6\n");
return 0;
}
void ioam6_exit(void)
{
unregister_pernet_subsys(&ioam6_net_ops);
}

19
net/ipv6/sysctl_net_ipv6.c
View File

@ -21,6 +21,7 @@
#ifdef CONFIG_NETLABEL
#include <net/calipso.h>
#endif
#include <linux/ioam6.h>
static int two = 2;
static int three = 3;
@ -28,6 +29,8 @@ static int flowlabel_reflect_max = 0x7;
static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
static u32 rt6_multipath_hash_fields_all_mask =
FIB_MULTIPATH_HASH_FIELD_ALL_MASK;
static u32 ioam6_id_max = IOAM6_DEFAULT_ID;
static u64 ioam6_id_wide_max = IOAM6_DEFAULT_ID_WIDE;
static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
@ -196,6 +199,22 @@ static struct ctl_table ipv6_table_template[] = {
.extra1 = SYSCTL_ZERO,
.extra2 = &two,
},
{
.procname = "ioam6_id",
.data = &init_net.ipv6.sysctl.ioam6_id,
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_douintvec_minmax,
.extra2 = &ioam6_id_max,
},
{
.procname = "ioam6_id_wide",
.data = &init_net.ipv6.sysctl.ioam6_id_wide,
.maxlen = sizeof(u64),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
.extra2 = &ioam6_id_wide_max,
},
{ }
};