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Revert "Filter: Allow setting the 'onlink' route attribute in filters"

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This reverts commit 7144c9ca46.

The onlink attribute implementation collides with the nexthop attribute
behavior in v3; keeping it aside until finding out how to reimplement it
correctly.
This commit is contained in:
Maria Matejka 2023-01-24 09:20:36 +01:00
parent 7144c9ca46
commit 9dc9124cec
4 changed files with 3 additions and 23 deletions
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8
doc/bird.sgml
View File

@ -1816,14 +1816,6 @@ Common route attributes are:
creation/removal. Zero is returned for routes with undefined outgoing
interfaces. Read-only.
<tag><label id="rta-onlink"><m/bool/ onlink</tag>
Onlink flag means that the specified nexthop is accessible on the
interface regardless of IP prefixes configured on the interface.
The attribute can be used to configure such next hops by first setting
<cf/onlink = true/ and <cf/ifname/, and then setting <cf/gw/. Possible
use case for setting this flag is to automatically build overlay IP-IP
networks on linux.
<tag><label id="rta-weight"><m/int/ weight</tag>
Multipath weight of route next hops. Valid values are 1-256. Reading
returns the weight of the first next hop, setting it sets weights of all

3
filter/config.Y
View File

@ -305,7 +305,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
IF, THEN, ELSE, CASE,
FOR, IN, DO,
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS, ONLINK,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
PREFERENCE,
ROA_CHECK, ASN, SRC, DST,
IS_V4, IS_V6,
@ -795,7 +795,6 @@ static_attr:
| WEIGHT { $$ = f_new_static_attr(T_INT, SA_WEIGHT, 0); }
| PREFERENCE { $$ = f_new_static_attr(T_INT, SA_PREF, 0); }
| GW_MPLS { $$ = f_new_static_attr(T_INT, SA_GW_MPLS, 0); }
| ONLINK { $$ = f_new_static_attr(T_BOOL, SA_ONLINK, 0); }
;
term:

1
filter/data.h
View File

@ -102,7 +102,6 @@ enum f_sa_code {
SA_WEIGHT,
SA_PREF,
SA_GW_MPLS,
SA_ONLINK,
} PACKED;
/* Static attribute definition (members of struct rta) */

14
filter/f-inst.c
View File

@ -694,7 +694,6 @@
case SA_WEIGHT: RESULT(sa.f_type, i, rta->nh.weight + 1); break;
case SA_PREF: RESULT(sa.f_type, i, rta->pref); break;
case SA_GW_MPLS: RESULT(sa.f_type, i, rta->nh.labels ? rta->nh.label[0] : MPLS_NULL); break;
case SA_ONLINK: RESULT(sa.f_type, i, rta->nh.flags & RNF_ONLINK ? 1 : 0); break;
default:
bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
@ -721,8 +720,8 @@
case SA_GW:
{
ip_addr ip = v1.val.ip;
struct iface *ifa = ipa_is_link_local(ip) || (rta->nh.flags & RNF_ONLINK) ? rta->nh.iface : NULL;
neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, (rta->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0);
struct iface *ifa = ipa_is_link_local(ip) ? rta->nh.iface : NULL;
neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, 0);
if (!n || (n->scope == SCOPE_HOST))
runtime( "Invalid gw address" );
@ -802,15 +801,6 @@
rta->pref = v1.val.i;
break;
case SA_ONLINK:
{
if (v1.val.i)
rta->nh.flags |= RNF_ONLINK;
else
rta->nh.flags &= ~RNF_ONLINK;
}
break;
default:
bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
}