bird/sysdep/unix/krt.Y
Maria Matejka 4c553c5a5b Filter refactoring: dropped the recursion from the interpreter
This is a major change of how the filters are interpreted. If everything
works how it should, it should not affect you unless you are hacking the
filters themselves.

Anyway, this change should make a huge improvement in the filter performance
as previous benchmarks showed that our major problem lies in the
recursion itself.

There are also some changes in nest and protocols, related mostly to
spreading const declarations throughout the whole BIRD and also to
refactored dynamic attribute definitions. The need of these came up
during the whole work and it is too difficult to split out these
not-so-related changes.
2019-02-20 22:30:54 +01:00

130 lines
2.8 KiB
Text

/*
* BIRD -- UNIX Kernel Syncer Configuration
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "sysdep/unix/krt.h"
CF_DEFINES
#define THIS_KRT ((struct krt_config *) this_proto)
#define THIS_KIF ((struct kif_config *) this_proto)
#define KIF_IFACE ((struct kif_iface_config *) this_ipatt)
static void
kif_set_preferred(ip_addr ip)
{
if (ipa_is_ip4(ip))
KIF_IFACE->pref_v4 = ip;
else if (!ipa_is_link_local(ip))
KIF_IFACE->pref_v6 = ip;
else
KIF_IFACE->pref_ll = ip;
}
CF_DECLS
CF_KEYWORDS(KERNEL, PERSIST, SCAN, TIME, LEARN, DEVICE, ROUTES, GRACEFUL, RESTART, KRT_SOURCE, KRT_METRIC, MERGE, PATHS)
CF_KEYWORDS(INTERFACE, PREFERRED)
%type <i> kern_mp_limit
CF_GRAMMAR
/* Kernel syncer protocol */
proto: kern_proto '}' ;
kern_proto_start: proto_start KERNEL {
this_proto = krt_init_config($1);
}
;
kern_proto: kern_proto_start proto_name '{' ;
kern_proto: kern_proto kern_item ';' ;
kern_mp_limit:
/* empty */ { $$ = KRT_DEFAULT_ECMP_LIMIT; }
| LIMIT expr { $$ = $2; if (($2 <= 0) || ($2 > 255)) cf_error("Merge paths limit must be in range 1-255"); }
;
kern_item:
proto_item
| proto_channel { this_proto->net_type = $1->net_type; }
| PERSIST bool { THIS_KRT->persist = $2; }
| SCAN TIME expr {
/* Scan time of 0 means scan on startup only */
THIS_KRT->scan_time = $3 S_;
}
| LEARN bool {
THIS_KRT->learn = $2;
#ifndef KRT_ALLOW_LEARN
if ($2)
cf_error("Learning of kernel routes not supported on this platform");
#endif
}
| GRACEFUL RESTART bool { THIS_KRT->graceful_restart = $3; }
| MERGE PATHS bool kern_mp_limit {
THIS_KRT->merge_paths = $3 ? $4 : 0;
#ifndef KRT_ALLOW_MERGE_PATHS
if ($3)
cf_error("Path merging not supported on this platform");
#endif
}
;
/* Kernel interface protocol */
proto: kif_proto '}' ;
kif_proto_start: proto_start DEVICE { this_proto = kif_init_config($1); }
;
kif_proto: kif_proto_start proto_name '{' ;
kif_proto: kif_proto kif_item ';' ;
kif_item:
proto_item
| INTERFACE kif_iface
| SCAN TIME expr {
/* Scan time of 0 means scan on startup only */
THIS_KIF->scan_time = $3 S_;
}
;
kif_iface_start:
{
this_ipatt = cfg_allocz(sizeof(struct kif_iface_config));
add_tail(&THIS_KIF->iface_list, NODE this_ipatt);
init_list(&this_ipatt->ipn_list);
}
kif_iface_item:
PREFERRED ipa { kif_set_preferred($2); }
;
kif_iface_opts:
/* empty */
| kif_iface_opts kif_iface_item ';'
;
kif_iface_opt_list:
/* empty */
| '{' kif_iface_opts '}'
;
kif_iface:
kif_iface_start iface_patt_list_nopx kif_iface_opt_list;
dynamic_attr: KRT_SOURCE { $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_KRT_SOURCE); } ;
dynamic_attr: KRT_METRIC { $$ = f_new_dynamic_attr(EAF_TYPE_INT, 0, T_INT, EA_KRT_METRIC); } ;
CF_CODE
CF_END