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From now we support multiple tables. The master_table variable is

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definitely gone. Both rte_update() and rte_discard() have an additional
argument telling which table should they modify.

Also, rte_update() no longer walks the whole protocol list -- each table
has a list of all protocols connected to this table and having the
rt_notify hook set. Each protocol can also freely decide (by calling
proto_add_announce_hook) to connect to any other table, but it will
be probably used only by the table-to-table protocol.

The default debugging dumps now include all routing tables and also
all their connections.
This commit is contained in:
Martin Mares 1999-05-17 20:14:52 +00:00
parent 4107df1d1b
commit 0e02abfd57
8 changed files with 175 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
conf/conf.c
View File

@ -10,6 +10,7 @@
#include <stdarg.h> #include <stdarg.h>
#include "nest/bird.h" #include "nest/bird.h"
#include "nest/route.h"
#include "nest/protocol.h" #include "nest/protocol.h"
#include "nest/iface.h" #include "nest/iface.h"
#include "lib/resource.h" #include "lib/resource.h"
@ -49,6 +50,7 @@ config_parse(struct config *c)
cf_lex_init(1); cf_lex_init(1);
cf_lex_init_tables(); cf_lex_init_tables();
protos_preconfig(c); protos_preconfig(c);
rt_preconfig(c);
cf_parse(); cf_parse();
filters_postconfig(); /* FIXME: Do we really need this? */ filters_postconfig(); /* FIXME: Do we really need this? */
protos_postconfig(c); protos_postconfig(c);
@ -65,6 +67,7 @@ void
config_commit(struct config *c) config_commit(struct config *c)
{ {
config = c; config = c;
rt_commit(c);
protos_commit(c); protos_commit(c);
} }

4
conf/confbase.Y
View File

@ -25,6 +25,7 @@ CF_DECLS
ip_addr a; ip_addr a;
struct symbol *s; struct symbol *s;
char *t; char *t;
struct rtable_config *r;
struct f_inst *x; struct f_inst *x;
struct filter *f; struct filter *f;
struct f_tree *e; struct f_tree *e;
@ -78,8 +79,7 @@ expr:
CF_ADDTO(conf, definition) CF_ADDTO(conf, definition)
definition: definition:
DEFINE SYM '=' expr ';' { DEFINE SYM '=' expr ';' {
if ($2->class != SYM_VOID) cf_error("Symbol already defined"); cf_define_symbol($2, SYM_NUMBER, NULL);
$2->class = SYM_NUMBER;
$2->aux = $4; $2->aux = $4;
} }
; ;

3
doc/bird.conf.example
View File

@ -11,6 +11,8 @@
#filter sink { reject; } #filter sink { reject; }
#filter okay { accept; } #filter okay { accept; }
#table testable;
#protocol rip MyRIP_test { #protocol rip MyRIP_test {
# preference xyzzy; # preference xyzzy;
# debug all; # debug all;
@ -38,6 +40,7 @@ protocol device {
protocol static { protocol static {
# disabled; # disabled;
# table testable;
# route 0.0.0.0/0 via 62.168.0.13; # route 0.0.0.0/0 via 62.168.0.13;
# route 62.168.0.0/25 reject; # route 62.168.0.0/25 reject;
# route 10.0.0.0/8 reject; # route 10.0.0.0/8 reject;

29
nest/config.Y
View File

@ -17,16 +17,18 @@ void rt_dev_add_iface(char *);
CF_DECLS CF_DECLS
CF_KEYWORDS(ROUTER, ID, PROTOCOL, PREFERENCE, DISABLED, DEBUG, ALL, OFF, DIRECT) CF_KEYWORDS(ROUTER, ID, PROTOCOL, PREFERENCE, DISABLED, DEBUG, ALL, OFF, DIRECT)
CF_KEYWORDS(INTERFACE, IMPORT, EXPORT, FILTER, NONE) CF_KEYWORDS(INTERFACE, IMPORT, EXPORT, FILTER, NONE, TABLE)
%type <i> idval %type <i> idval
%type <f> imexport %type <f> imexport
%type <r> rtable
CF_GRAMMAR CF_GRAMMAR
/* Setting of router ID */ /* Setting of router ID */
CF_ADDTO(conf, rtrid) CF_ADDTO(conf, rtrid)
rtrid: ROUTER ID idval ';' { rtrid: ROUTER ID idval ';' {
new_config->router_id = $3; new_config->router_id = $3;
} }
@ -37,6 +39,19 @@ idval:
| IPA { $$ = ipa_to_u32($1); } | IPA { $$ = ipa_to_u32($1); }
; ;
/* Creation of routing tables */
CF_ADDTO(conf, newtab)
newtab: TABLE SYM {
struct rtable_config *c = cfg_allocz(sizeof(struct rtable_config));
struct symbol *s = $2;
cf_define_symbol(s, SYM_TABLE, c);
c->name = s->name;
add_tail(&new_config->tables, &c->n);
}
;
/* Definition of protocols */ /* Definition of protocols */
CF_ADDTO(conf, proto) CF_ADDTO(conf, proto)
@ -51,9 +66,7 @@ proto_name:
this_proto->name = s->name; this_proto->name = s->name;
} }
| SYM { | SYM {
if ($1->class) cf_error("Symbol already defined"); cf_define_symbol($1, SYM_PROTO, this_proto);
$1->class = SYM_PROTO;
$1->def = this_proto;
this_proto->name = $1->name; this_proto->name = $1->name;
} }
; ;
@ -70,6 +83,7 @@ proto_item:
| DEBUG OFF { this_proto->debug = 0; } | DEBUG OFF { this_proto->debug = 0; }
| IMPORT imexport { this_proto->in_filter = $2; } | IMPORT imexport { this_proto->in_filter = $2; }
| EXPORT imexport { this_proto->out_filter = $2; } | EXPORT imexport { this_proto->out_filter = $2; }
| TABLE rtable { this_proto->table = $2; }
; ;
imexport: imexport:
@ -78,6 +92,13 @@ imexport:
| NONE { $$ = FILTER_REJECT; } | NONE { $$ = FILTER_REJECT; }
; ;
rtable:
SYM {
if ($1->class != SYM_TABLE) cf_error("Table name expected");
$$ = $1->def;
}
;
/* Direct device route protocol */ /* Direct device route protocol */
CF_ADDTO(proto, dev_proto '}') CF_ADDTO(proto, dev_proto '}')

33
nest/proto.c
View File

@ -86,7 +86,7 @@ proto_new(struct proto_config *c, unsigned size)
p->preference = c->preference; p->preference = c->preference;
p->disabled = c->disabled; p->disabled = c->disabled;
p->proto = pr; p->proto = pr;
p->table = &master_table; p->table = (c->table ? : c->global->master_rtc)->table;
p->in_filter = c->in_filter; p->in_filter = c->in_filter;
p->out_filter = c->out_filter; p->out_filter = c->out_filter;
return p; return p;
@ -101,6 +101,33 @@ proto_init_instance(struct proto *p)
p->attn->data = p; p->attn->data = p;
} }
struct announce_hook *
proto_add_announce_hook(struct proto *p, struct rtable *t)
{
struct announce_hook *h;
if (!p->rt_notify)
return NULL;
DBG("Connecting protocol %s to table %s\n", p->name, t->name);
h = mb_alloc(p->pool, sizeof(struct announce_hook));
h->table = t;
h->proto = p;
h->next = p->ahooks;
p->ahooks = h;
add_tail(&t->hooks, &h->n);
return h;
}
static void
proto_flush_hooks(struct proto *p)
{
struct announce_hook *h;
for(h=p->ahooks; h; h=h->next)
rem_node(&h->n);
p->ahooks = NULL;
}
void * void *
proto_config_new(struct protocol *pr, unsigned size) proto_config_new(struct protocol *pr, unsigned size)
{ {
@ -296,6 +323,7 @@ proto_feed(void *P)
struct proto *p = P; struct proto *p = P;
DBG("Feeding protocol %s\n", p->name); DBG("Feeding protocol %s\n", p->name);
proto_add_announce_hook(p, p->table);
if_feed_baby(p); if_feed_baby(p);
rt_feed_baby(p); rt_feed_baby(p);
p->core_state = FS_HAPPY; p->core_state = FS_HAPPY;
@ -365,11 +393,12 @@ proto_flush_all(void *unused)
{ {
struct proto *p; struct proto *p;
rt_prune(&master_table); rt_prune_all();
neigh_prune(); neigh_prune();
while ((p = HEAD(flush_proto_list))->n.next) while ((p = HEAD(flush_proto_list))->n.next)
{ {
DBG("Flushing protocol %s\n", p->name); DBG("Flushing protocol %s\n", p->name);
proto_flush_hooks(p);
rfree(p->pool); rfree(p->pool);
p->pool = NULL; p->pool = NULL;
p->core_state = FS_HUNGRY; p->core_state = FS_HUNGRY;

17
nest/protocol.h
View File

@ -73,6 +73,7 @@ struct proto_config {
struct protocol *proto; /* Protocol */ struct protocol *proto; /* Protocol */
char *name; char *name;
unsigned debug, preference, disabled; /* Generic parameters */ unsigned debug, preference, disabled; /* Generic parameters */
struct rtable_config *table; /* Table we're attached to */
struct filter *in_filter, *out_filter; /* Attached filters */ struct filter *in_filter, *out_filter; /* Attached filters */
/* Protocol-specific data follow... */ /* Protocol-specific data follow... */
@ -128,9 +129,10 @@ struct proto {
void (*rte_insert)(struct network *, struct rte *); void (*rte_insert)(struct network *, struct rte *);
void (*rte_remove)(struct network *, struct rte *); void (*rte_remove)(struct network *, struct rte *);
struct rtable *table; /* Routing table we're connected to */ struct rtable *table; /* Our primary routing table */
struct filter *in_filter; /* Input filter */ struct filter *in_filter; /* Input filter */
struct filter *out_filter; /* Output filter */ struct filter *out_filter; /* Output filter */
struct announce_hook *ahooks; /* Announcement hooks for this protocol */
/* Hic sunt protocol-specific data */ /* Hic sunt protocol-specific data */
}; };
@ -222,6 +224,19 @@ void proto_notify_state(struct proto *p, unsigned state);
extern struct proto_config *cf_dev_proto; extern struct proto_config *cf_dev_proto;
/*
* Route Announcement Hook
*/
struct announce_hook {
node n;
struct rtable *table;
struct proto *proto;
struct announce_hook *next; /* Next hook for the same protocol */
};
struct announce_hook *proto_add_announce_hook(struct proto *, struct rtable *);
/* /*
* Callback to sysdep code when shutdown is finished * Callback to sysdep code when shutdown is finished
*/ */

18
nest/route.h
View File

@ -9,6 +9,7 @@
#ifndef _BIRD_ROUTE_H_ #ifndef _BIRD_ROUTE_H_
#define _BIRD_ROUTE_H_ #define _BIRD_ROUTE_H_
#include "lib/lists.h"
#include "lib/resource.h" #include "lib/resource.h"
#include "lib/timer.h" #include "lib/timer.h"
@ -104,9 +105,17 @@ void fit_put(struct fib_iterator *, struct fib_node *);
* It's guaranteed that there is at most one RTE for every (prefix,proto) pair. * It's guaranteed that there is at most one RTE for every (prefix,proto) pair.
*/ */
struct rtable_config {
node n;
char *name;
struct rtable *table;
};
typedef struct rtable { typedef struct rtable {
node n; /* Node in list of all tables */
struct fib fib; struct fib fib;
char *name; /* Name of this table */ char *name; /* Name of this table */
list hooks; /* List of announcement hooks */
} rtable; } rtable;
typedef struct network { typedef struct network {
@ -152,16 +161,18 @@ typedef struct rte {
#define REF_COW 1 /* Copy this rte on write */ #define REF_COW 1 /* Copy this rte on write */
extern rtable master_table; struct config;
void rt_init(void); void rt_init(void);
void rt_preconfig(struct config *);
void rt_commit(struct config *);
void rt_setup(pool *, rtable *, char *); void rt_setup(pool *, rtable *, char *);
static inline net *net_find(rtable *tab, ip_addr addr, unsigned len) { return (net *) fib_find(&tab->fib, &addr, len); } static inline net *net_find(rtable *tab, ip_addr addr, unsigned len) { return (net *) fib_find(&tab->fib, &addr, len); }
static inline net *net_get(rtable *tab, ip_addr addr, unsigned len) { return (net *) fib_get(&tab->fib, &addr, len); } static inline net *net_get(rtable *tab, ip_addr addr, unsigned len) { return (net *) fib_get(&tab->fib, &addr, len); }
rte *rte_find(net *net, struct proto *p); rte *rte_find(net *net, struct proto *p);
rte *rte_get_temp(struct rta *); rte *rte_get_temp(struct rta *);
void rte_update(net *net, struct proto *p, rte *new); void rte_update(rtable *tab, net *net, struct proto *p, rte *new);
void rte_discard(rte *old); void rte_discard(rtable *tab, rte *old);
void rte_dump(rte *); void rte_dump(rte *);
void rte_free(rte *); void rte_free(rte *);
rte *rte_do_cow(rte *); rte *rte_do_cow(rte *);
@ -170,6 +181,7 @@ void rt_dump(rtable *);
void rt_dump_all(void); void rt_dump_all(void);
void rt_feed_baby(struct proto *p); void rt_feed_baby(struct proto *p);
void rt_prune(rtable *tab); void rt_prune(rtable *tab);
void rt_prune_all(void);
/* /*
* Route Attributes * Route Attributes

94
nest/rt-table.c
View File

@ -15,9 +15,9 @@
#include "nest/protocol.h" #include "nest/protocol.h"
#include "lib/resource.h" #include "lib/resource.h"
#include "lib/event.h" #include "lib/event.h"
#include "conf/conf.h"
#include "filter/filter.h" #include "filter/filter.h"
rtable master_table;
static slab *rte_slab; static slab *rte_slab;
static linpool *rte_update_pool; static linpool *rte_update_pool;
@ -25,6 +25,7 @@ static linpool *rte_update_pool;
#define RT_GC_MIN_COUNT 100 #define RT_GC_MIN_COUNT 100
static pool *rt_table_pool; static pool *rt_table_pool;
static list routing_tables;
static event *rt_gc_event; static event *rt_gc_event;
static bird_clock_t rt_last_gc; static bird_clock_t rt_last_gc;
static int rt_gc_counter; static int rt_gc_counter;
@ -44,6 +45,7 @@ rt_setup(pool *p, rtable *t, char *name)
bzero(t, sizeof(*t)); bzero(t, sizeof(*t));
fib_init(&t->fib, p, sizeof(rte), 0, rte_init); fib_init(&t->fib, p, sizeof(rte), 0, rte_init);
t->name = name; t->name = name;
init_list(&t->hooks);
} }
rte * rte *
@ -97,8 +99,9 @@ rte_better(rte *new, rte *old)
} }
static inline void static inline void
do_rte_announce(struct proto *p, net *net, rte *new, rte *old, ea_list *tmpa) do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *tmpa)
{ {
struct proto *p = a->proto;
rte *new0 = new; rte *new0 = new;
rte *old0 = old; rte *old0 = old;
if (new) if (new)
@ -132,26 +135,28 @@ do_rte_announce(struct proto *p, net *net, rte *new, rte *old, ea_list *tmpa)
} }
static void static void
rte_announce(net *net, rte *new, rte *old, ea_list *tmpa) rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
{ {
struct proto *p; struct announce_hook *a;
WALK_LIST(p, proto_list) WALK_LIST(a, tab->hooks)
{ {
ASSERT(p->core_state == FS_HAPPY); ASSERT(a->proto->core_state == FS_HAPPY);
if (p->rt_notify) do_rte_announce(a, net, new, old, tmpa);
do_rte_announce(p, net, new, old, tmpa);
} }
} }
void void
rt_feed_baby(struct proto *p) rt_feed_baby(struct proto *p)
{ {
rtable *t = &master_table; struct announce_hook *h;
if (!p->rt_notify) if (!p->ahooks)
return; return;
debug("Announcing routes to new protocol %s\n", p->name); debug("Announcing routes to new protocol %s\n", p->name);
for(h=p->ahooks; h; h=h->next)
{
rtable *t = h->table;
FIB_WALK(&t->fib, fn) FIB_WALK(&t->fib, fn)
{ {
net *n = (net *) fn; net *n = (net *) fn;
@ -160,12 +165,13 @@ rt_feed_baby(struct proto *p)
{ {
struct proto *q = e->attrs->proto; struct proto *q = e->attrs->proto;
ea_list *tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL; ea_list *tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
do_rte_announce(p, n, e, NULL, tmpa); do_rte_announce(h, n, e, NULL, tmpa);
lp_flush(rte_update_pool); lp_flush(rte_update_pool);
} }
} }
FIB_WALK_END; FIB_WALK_END;
} }
}
static inline int static inline int
rte_validate(rte *e) rte_validate(rte *e)
@ -215,7 +221,7 @@ rte_free_quick(rte *e)
} }
static void static void
rte_recalculate(net *net, struct proto *p, rte *new, ea_list *tmpa) rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmpa)
{ {
rte *old_best = net->routes; rte *old_best = net->routes;
rte *old = NULL; rte *old = NULL;
@ -234,7 +240,7 @@ rte_recalculate(net *net, struct proto *p, rte *new, ea_list *tmpa)
if (new && rte_better(new, old_best)) /* It's a new optimal route => announce and relink it */ if (new && rte_better(new, old_best)) /* It's a new optimal route => announce and relink it */
{ {
rte_announce(net, new, old_best, tmpa); rte_announce(table, net, new, old_best, tmpa);
new->next = net->routes; new->next = net->routes;
net->routes = new; net->routes = new;
} }
@ -246,7 +252,7 @@ rte_recalculate(net *net, struct proto *p, rte *new, ea_list *tmpa)
for(s=net->routes; s; s=s->next) for(s=net->routes; s; s=s->next)
if (rte_better(s, r)) if (rte_better(s, r))
r = s; r = s;
rte_announce(net, r, old_best, tmpa); rte_announce(table, net, r, old_best, tmpa);
if (r) /* Re-link the new optimal route */ if (r) /* Re-link the new optimal route */
{ {
k = &net->routes; k = &net->routes;
@ -301,7 +307,7 @@ rte_update_unlock(void)
} }
void void
rte_update(net *net, struct proto *p, rte *new) rte_update(rtable *table, net *net, struct proto *p, rte *new)
{ {
ea_list *tmpa = NULL; ea_list *tmpa = NULL;
@ -324,7 +330,7 @@ rte_update(net *net, struct proto *p, rte *new)
new->attrs = rta_lookup(new->attrs); new->attrs = rta_lookup(new->attrs);
new->flags |= REF_COW; new->flags |= REF_COW;
} }
rte_recalculate(net, p, new, tmpa); rte_recalculate(table, net, p, new, tmpa);
rte_update_unlock(); rte_update_unlock();
return; return;
@ -334,10 +340,10 @@ drop:
} }
void void
rte_discard(rte *old) /* Non-filtered route deletion, used during garbage collection */ rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */
{ {
rte_update_lock(); rte_update_lock();
rte_recalculate(old->net, old->attrs->proto, NULL, NULL); rte_recalculate(t, old->net, old->attrs->proto, NULL, NULL);
rte_update_unlock(); rte_update_unlock();
} }
@ -361,6 +367,7 @@ rt_dump(rtable *t)
{ {
rte *e; rte *e;
net *n; net *n;
struct announce_hook *a;
debug("Dump of routing table <%s>\n", t->name); debug("Dump of routing table <%s>\n", t->name);
#ifdef DEBUGGING #ifdef DEBUGGING
@ -373,20 +380,27 @@ rt_dump(rtable *t)
rte_dump(e); rte_dump(e);
} }
FIB_WALK_END; FIB_WALK_END;
WALK_LIST(a, t->hooks)
debug("\tAnnounces routes to protocol %s\n", a->proto->name);
debug("\n"); debug("\n");
} }
void void
rt_dump_all(void) rt_dump_all(void)
{ {
rt_dump(&master_table); rtable *t;
WALK_LIST(t, routing_tables)
rt_dump(t);
} }
static void static void
rt_gc(void *unused) rt_gc(void *unused)
{ {
rtable *t;
DBG("Entered routing table garbage collector after %d seconds and %d deletes\n", (int)(now - rt_last_gc), rt_gc_counter); DBG("Entered routing table garbage collector after %d seconds and %d deletes\n", (int)(now - rt_last_gc), rt_gc_counter);
rt_prune(&master_table); rt_prune_all();
rt_last_gc = now; rt_last_gc = now;
rt_gc_counter = 0; rt_gc_counter = 0;
} }
@ -397,11 +411,11 @@ rt_init(void)
rta_init(); rta_init();
rt_table_pool = rp_new(&root_pool, "Routing tables"); rt_table_pool = rp_new(&root_pool, "Routing tables");
rte_update_pool = lp_new(rt_table_pool, 4080); rte_update_pool = lp_new(rt_table_pool, 4080);
rt_setup(rt_table_pool, &master_table, "master");
rte_slab = sl_new(rt_table_pool, sizeof(rte)); rte_slab = sl_new(rt_table_pool, sizeof(rte));
rt_last_gc = now; rt_last_gc = now;
rt_gc_event = ev_new(rt_table_pool); rt_gc_event = ev_new(rt_table_pool);
rt_gc_event->hook = rt_gc; rt_gc_event->hook = rt_gc;
init_list(&routing_tables);
} }
void void
@ -422,7 +436,7 @@ again:
for (e=n->routes; e; e=e->next, rcnt++) for (e=n->routes; e; e=e->next, rcnt++)
if (e->attrs->proto->core_state != FS_HAPPY) if (e->attrs->proto->core_state != FS_HAPPY)
{ {
rte_discard(e); rte_discard(tab, e);
rdel++; rdel++;
goto rescan; goto rescan;
} }
@ -437,3 +451,39 @@ again:
FIB_ITERATE_END(f); FIB_ITERATE_END(f);
DBG("Pruned %d of %d routes and %d of %d networks\n", rcnt, rdel, ncnt, ndel); DBG("Pruned %d of %d routes and %d of %d networks\n", rcnt, rdel, ncnt, ndel);
} }
void
rt_prune_all(void)
{
rtable *t;
WALK_LIST(t, routing_tables)
rt_prune(t);
}
void
rt_preconfig(struct config *c)
{
struct symbol *s = cf_find_symbol("master");
struct rtable_config *r = cfg_allocz(sizeof(struct rtable_config));
cf_define_symbol(s, SYM_TABLE, r);
r->name = s->name;
init_list(&c->tables);
add_tail(&c->tables, &r->n);
c->master_rtc = r;
}
void
rt_commit(struct config *c)
{
struct rtable_config *r;
WALK_LIST(r, c->tables)
{
rtable *t = mb_alloc(rt_table_pool, sizeof(struct rtable));
rt_setup(rt_table_pool, t, r->name);
add_tail(&routing_tables, &t->n);
r->table = t;
}
}