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Better support for multitable protocols.

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The nest-protocol interaction is changed to better handle multitable
protocols. Multitable protocols now declare that by 'multitable' field,
which tells nest that a protocol handles things related to proto-rtable
interaction (table locking, announce hook adding, reconfiguration of
filters) itself.

Filters and stats are moved to announce hooks, a protocol could have
different filters and stats to different tables.

The patch is based on one from Alexander V. Chernikov, thanks.
This commit is contained in:
Ondrej Zajicek 2012-03-15 11:58:08 +01:00
parent 46c1a583a5
commit c0adf7e9fc
8 changed files with 329 additions and 204 deletions
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13
nest/proto-hooks.c
View file

@ -90,7 +90,7 @@ void dump_attrs(rte *e)
* @p: protocol instance
*
* The start() hook is called by the core when it wishes to start
* the instance.
* the instance. Multitable protocols should lock their tables here.
*
* Result: new protocol state
*/
@ -109,6 +109,17 @@ int start(struct proto *p)
int shutdown(struct proto *p)
{ DUMMY; }
/**
* cleanup - request instance cleanup
* @p: protocol instance
*
* The cleanup() hook is called by the core when the protocol became
* hungry/down, i.e. all protocol ahooks and routes are flushed.
* Multitable protocols should unlock their tables here.
*/
void cleanup(struct proto *p)
{ DUMMY; }
/**
* get_status - get instance status
* @p: protocol instance

210
nest/proto.c
View file

@ -112,8 +112,6 @@ proto_new(struct proto_config *c, unsigned size)
p->disabled = c->disabled;
p->proto = pr;
p->table = c->table->table;
p->in_filter = c->in_filter;
p->out_filter = c->out_filter;
p->hash_key = random_u32();
c->proto = p;
return p;
@ -126,49 +124,102 @@ proto_init_instance(struct proto *p)
p->pool = rp_new(proto_pool, p->proto->name);
p->attn = ev_new(p->pool);
p->attn->data = p;
rt_lock_table(p->table);
if (! p->proto->multitable)
rt_lock_table(p->table);
}
extern pool *rt_table_pool;
/**
* proto_add_announce_hook - connect protocol to a routing table
* @p: protocol instance
* @t: routing table to connect to
* @in: input filter
* @out: output filter
* @stats: per-table protocol statistics
*
* This function creates a connection between the protocol instance @p
* and the routing table @t, making the protocol hear all changes in
* the table.
*
* The announce hook is linked in the protocol ahook list and, if the
* protocol accepts routes, also in the table ahook list. Announce
* hooks are allocated from the routing table resource pool, they are
* unlinked from the table ahook list after the protocol went down,
* (in proto_schedule_flush()) and they are automatically freed after the
* protocol is flushed (in proto_fell_down()).
*
* Unless you want to listen to multiple routing tables (as the Pipe
* protocol does), you needn't to worry about this function since the
* connection to the protocol's primary routing table is initialized
* automatically by the core code.
*/
struct announce_hook *
proto_add_announce_hook(struct proto *p, struct rtable *t)
proto_add_announce_hook(struct proto *p, struct rtable *t, struct filter *in,
struct filter *out, struct proto_stats *stats)
{
struct announce_hook *h;
if (!p->rt_notify)
return NULL;
DBG("Connecting protocol %s to table %s\n", p->name, t->name);
PD(p, "Connected to table %s", t->name);
h = mb_alloc(p->pool, sizeof(struct announce_hook));
h = mb_allocz(rt_table_pool, sizeof(struct announce_hook));
h->table = t;
h->proto = p;
h->in_filter = in;
h->out_filter = out;
h->stats = stats;
h->next = p->ahooks;
p->ahooks = h;
add_tail(&t->hooks, &h->n);
if (p->rt_notify)
add_tail(&t->hooks, &h->n);
return h;
}
/**
* proto_find_announce_hook - find announce hooks
* @p: protocol instance
* @t: routing table
*
* Returns pointer to announce hook or NULL
*/
struct announce_hook *
proto_find_announce_hook(struct proto *p, struct rtable *t)
{
struct announce_hook *a;
for (a = p->ahooks; a; a = a->next)
if (a->table == t)
return a;
return NULL;
}
static void
proto_flush_hooks(struct proto *p)
proto_unlink_ahooks(struct proto *p)
{
struct announce_hook *h;
for(h=p->ahooks; h; h=h->next)
rem_node(&h->n);
if (p->rt_notify)
for(h=p->ahooks; h; h=h->next)
rem_node(&h->n);
}
static void
proto_free_ahooks(struct proto *p)
{
struct announce_hook *h, *hn;
for(h = p->ahooks; h; h = hn)
{
hn = h->next;
mb_free(h);
}
p->ahooks = NULL;
p->main_ahook = NULL;
}
/**
@ -322,6 +373,8 @@ proto_init(struct proto_config *c)
return q;
}
int proto_reconfig_type; /* Hack to propagate type info to pipe reconfigure hook */
static int
proto_reconfigure(struct proto *p, struct proto_config *oc, struct proto_config *nc, int type)
{
@ -336,23 +389,10 @@ proto_reconfigure(struct proto *p, struct proto_config *oc, struct proto_config
(proto_get_router_id(nc) != proto_get_router_id(oc)))
return 0;
int import_changed = (type != RECONFIG_SOFT) && ! filter_same(nc->in_filter, oc->in_filter);
int export_changed = (type != RECONFIG_SOFT) && ! filter_same(nc->out_filter, oc->out_filter);
/* We treat a change in preferences by reimporting routes */
if (nc->preference != oc->preference)
import_changed = 1;
/* If the protocol in not UP, it has no routes and we can ignore such changes */
if (p->proto_state != PS_UP)
import_changed = export_changed = 0;
/* Without this hook we cannot reload routes and have to restart the protocol */
if (import_changed && ! p->reload_routes)
return 0;
p->debug = nc->debug;
p->mrtdump = nc->mrtdump;
proto_reconfig_type = type;
/* Execute protocol specific reconfigure hook */
if (! (p->proto->reconfigure && p->proto->reconfigure(p, nc)))
@ -362,14 +402,37 @@ proto_reconfigure(struct proto *p, struct proto_config *oc, struct proto_config
PD(p, "Reconfigured");
p->cf = nc;
p->name = nc->name;
p->in_filter = nc->in_filter;
p->out_filter = nc->out_filter;
p->preference = nc->preference;
/* Multitable protocols handle rest in their reconfigure hooks */
if (p->proto->multitable)
return 1;
/* Update filters in the main announce hook */
if (p->main_ahook)
{
p->main_ahook->in_filter = nc->in_filter;
p->main_ahook->out_filter = nc->out_filter;
}
/* Update routes when filters changed. If the protocol in not UP,
it has no routes and we can ignore such changes */
if ((p->proto_state != PS_UP) || (type == RECONFIG_SOFT))
return 1;
int import_changed = ! filter_same(nc->in_filter, oc->in_filter);
int export_changed = ! filter_same(nc->out_filter, oc->out_filter);
/* We treat a change in preferences by reimporting routes */
if (nc->preference != oc->preference)
import_changed = 1;
if (import_changed || export_changed)
log(L_INFO "Reloading protocol %s", p->name);
if (import_changed && ! p->reload_routes(p))
/* If import filter changed, call reload hook */
if (import_changed && ! (p->reload_routes && p->reload_routes(p)))
{
/* Now, the protocol is reconfigured. But route reload failed
and we have to do regular protocol restart. */
@ -553,6 +616,7 @@ void
protos_dump_all(void)
{
struct proto *p;
struct announce_hook *a;
debug("Protocols:\n");
@ -560,10 +624,14 @@ protos_dump_all(void)
{
debug(" protocol %s state %s/%s\n", p->name,
p_states[p->proto_state], c_states[p->core_state]);
if (p->in_filter)
debug("\tInput filter: %s\n", filter_name(p->in_filter));
if (p->out_filter != FILTER_REJECT)
debug("\tOutput filter: %s\n", filter_name(p->out_filter));
for (a = p->ahooks; a; a = a->next)
{
debug("\tTABLE %s\n", a->table->name);
if (a->in_filter)
debug("\tInput filter: %s\n", filter_name(a->in_filter));
if (a->out_filter != FILTER_REJECT)
debug("\tOutput filter: %s\n", filter_name(a->out_filter));
}
if (p->disabled)
debug("\tDISABLED\n");
else if (p->proto->dump)
@ -647,7 +715,10 @@ proto_fell_down(struct proto *p)
log(L_ERR "Protocol %s is down but still has %d routes", p->name, p->stats.imp_routes);
bzero(&p->stats, sizeof(struct proto_stats));
rt_unlock_table(p->table);
proto_free_ahooks(p);
if (! p->proto->multitable)
rt_unlock_table(p->table);
if (p->proto->cleanup)
p->proto->cleanup(p);
@ -686,7 +757,7 @@ proto_feed_initial(void *P)
return;
DBG("Feeding protocol %s\n", p->name);
proto_add_announce_hook(p, p->table);
if_feed_baby(p);
proto_feed_more(P);
}
@ -701,7 +772,7 @@ proto_schedule_flush(struct proto *p)
DBG("%s: Scheduling flush\n", p->name);
p->core_state = FS_FLUSHING;
proto_relink(p);
proto_flush_hooks(p);
proto_unlink_ahooks(p);
ev_schedule(proto_flush_event);
}
@ -716,6 +787,11 @@ proto_schedule_feed(struct proto *p, int initial)
if (!initial)
p->stats.exp_routes = 0;
/* Connect protocol to routing table */
if (initial && !p->proto->multitable)
p->main_ahook = proto_add_announce_hook(p, p->table,
p->cf->in_filter, p->cf->out_filter, &p->stats);
proto_relink(p);
p->attn->hook = initial ? proto_feed_initial : proto_feed_more;
ev_schedule(p->attn);
@ -855,9 +931,8 @@ proto_state_name(struct proto *p)
}
static void
proto_do_show_stats(struct proto *p)
proto_show_stats(struct proto_stats *s)
{
struct proto_stats *s = &p->stats;
cli_msg(-1006, " Routes: %u imported, %u exported, %u preferred",
s->imp_routes, s->exp_routes, s->pref_routes);
cli_msg(-1006, " Route change stats: received rejected filtered ignored accepted");
@ -875,47 +950,17 @@ proto_do_show_stats(struct proto *p)
s->exp_withdraws_received, s->exp_withdraws_accepted);
}
#ifdef CONFIG_PIPE
static void
proto_do_show_pipe_stats(struct proto *p)
void
proto_show_basic_info(struct proto *p)
{
struct proto_stats *s1 = &p->stats;
struct proto_stats *s2 = pipe_get_peer_stats(p);
// cli_msg(-1006, " Table: %s", p->table->name);
cli_msg(-1006, " Preference: %d", p->preference);
cli_msg(-1006, " Input filter: %s", filter_name(p->cf->in_filter));
cli_msg(-1006, " Output filter: %s", filter_name(p->cf->out_filter));
/*
* Pipe stats (as anything related to pipes) are a bit tricky. There
* are two sets of stats - s1 for routes going from the primary
* routing table to the secondary routing table ('exported' from the
* user point of view) and s2 for routes going in the other
* direction ('imported' from the user point of view).
*
* Each route going through a pipe is, technically, first exported
* to the pipe and then imported from that pipe and such operations
* are counted in one set of stats according to the direction of the
* route propagation. Filtering is done just in the first part
* (export). Therefore, we compose stats for one directon for one
* user direction from both import and export stats, skipping
* immediate and irrelevant steps (exp_updates_accepted,
* imp_updates_received, imp_updates_filtered, ...)
*/
cli_msg(-1006, " Routes: %u imported, %u exported",
s2->imp_routes, s1->imp_routes);
cli_msg(-1006, " Route change stats: received rejected filtered ignored accepted");
cli_msg(-1006, " Import updates: %10u %10u %10u %10u %10u",
s2->exp_updates_received, s2->exp_updates_rejected + s2->imp_updates_invalid,
s2->exp_updates_filtered, s2->imp_updates_ignored, s2->imp_updates_accepted);
cli_msg(-1006, " Import withdraws: %10u %10u --- %10u %10u",
s2->exp_withdraws_received, s2->imp_withdraws_invalid,
s2->imp_withdraws_ignored, s2->imp_withdraws_accepted);
cli_msg(-1006, " Export updates: %10u %10u %10u %10u %10u",
s1->exp_updates_received, s1->exp_updates_rejected + s1->imp_updates_invalid,
s1->exp_updates_filtered, s1->imp_updates_ignored, s1->imp_updates_accepted);
cli_msg(-1006, " Export withdraws: %10u %10u --- %10u %10u",
s1->exp_withdraws_received, s1->imp_withdraws_invalid,
s1->imp_withdraws_ignored, s1->imp_withdraws_accepted);
if (p->proto_state != PS_DOWN)
proto_show_stats(&p->stats);
}
#endif
void
proto_cmd_show(struct proto *p, unsigned int verbose, int cnt)
@ -943,22 +988,11 @@ proto_cmd_show(struct proto *p, unsigned int verbose, int cnt)
cli_msg(-1006, " Description: %s", p->cf->dsc);
if (p->cf->router_id)
cli_msg(-1006, " Router ID: %R", p->cf->router_id);
cli_msg(-1006, " Preference: %d", p->preference);
cli_msg(-1006, " Input filter: %s", filter_name(p->in_filter));
cli_msg(-1006, " Output filter: %s", filter_name(p->out_filter));
if (p->proto_state != PS_DOWN)
{
#ifdef CONFIG_PIPE
if (proto_is_pipe(p))
proto_do_show_pipe_stats(p);
else
#endif
proto_do_show_stats(p);
}
if (p->proto->show_proto_info)
p->proto->show_proto_info(p);
else
proto_show_basic_info(p);
cli_msg(-1006, "");
}

22
nest/protocol.h
View file

@ -39,6 +39,7 @@ struct protocol {
char *template; /* Template for automatic generation of names */
int name_counter; /* Counter for automatic name generation */
int attr_class; /* Attribute class known to this protocol */
int multitable; /* Protocol handles all announce hooks itself */
unsigned preference; /* Default protocol preference */
void (*preconfig)(struct protocol *, struct config *); /* Just before configuring */
@ -193,8 +194,7 @@ struct proto {
void (*rte_remove)(struct network *, struct rte *);
struct rtable *table; /* Our primary routing table */
struct filter *in_filter; /* Input filter */
struct filter *out_filter; /* Output filter */
struct announce_hook *main_ahook; /* Primary announcement hook */
struct announce_hook *ahooks; /* Announcement hooks for this protocol */
struct fib_iterator *feed_iterator; /* Routing table iterator used during protocol feeding */
@ -218,6 +218,9 @@ static inline void
proto_copy_rest(struct proto_config *dest, struct proto_config *src, unsigned size)
{ memcpy(dest + 1, src + 1, size - sizeof(struct proto_config)); }
void proto_show_basic_info(struct proto *p);
void proto_cmd_show(struct proto *, unsigned int, int);
void proto_cmd_disable(struct proto *, unsigned int, int);
void proto_cmd_enable(struct proto *, unsigned int, int);
@ -352,18 +355,13 @@ struct announce_hook {
node n;
struct rtable *table;
struct proto *proto;
struct filter *in_filter; /* Input filter */
struct filter *out_filter; /* Output filter */
struct proto_stats *stats; /* Per-table protocol statistics */
struct announce_hook *next; /* Next hook for the same protocol */
};
struct announce_hook *proto_add_announce_hook(struct proto *, struct rtable *);
/*
* Some pipe-specific nest hacks
*/
#ifdef CONFIG_PIPE
#include "proto/pipe/pipe.h"
#endif
struct announce_hook *proto_add_announce_hook(struct proto *, struct rtable *, struct filter *, struct filter *, struct proto_stats *);
struct announce_hook *proto_find_announce_hook(struct proto *p, struct rtable *t);
#endif

6
nest/route.h
View file

@ -12,6 +12,7 @@
#include "lib/lists.h"
#include "lib/resource.h"
#include "lib/timer.h"
#include "nest/protocol.h"
struct protocol;
struct proto;
@ -179,7 +180,7 @@ struct hostentry {
typedef struct rte {
struct rte *next;
net *net; /* Network this RTE belongs to */
struct proto *sender; /* Protocol instance that sent the route to the routing table */
struct announce_hook *sender; /* Announce hook used to send the route to the routing table */
struct rta *attrs; /* Attributes of this route */
byte flags; /* Flags (REF_...) */
byte pflags; /* Protocol-specific flags */
@ -234,7 +235,8 @@ static inline net *net_find(rtable *tab, ip_addr addr, unsigned len) { return (n
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_get_temp(struct rta *);
void rte_update(rtable *tab, net *net, struct proto *p, struct proto *src, rte *new);
void rte_update2(struct announce_hook *ah, net *net, rte *new, struct proto *src);
static inline void rte_update(rtable *tab, net *net, struct proto *p, struct proto *src, rte *new) { rte_update2(p->main_ahook, net, new, src); }
void rte_discard(rtable *tab, rte *old);
void rte_dump(rte *);
void rte_free(rte *);

82
nest/rt-table.c
View file

@ -184,24 +184,16 @@ rte_trace_out(unsigned int flag, struct proto *p, rte *e, char *msg)
}
static inline void
do_rte_announce(struct announce_hook *a, int type UNUSED, net *net, rte *new, rte *old, ea_list *tmpa, int refeed)
do_rte_announce(struct announce_hook *ah, int type UNUSED, net *net, rte *new, rte *old, ea_list *tmpa, int refeed)
{
struct proto *p = a->proto;
struct filter *filter = p->out_filter;
struct proto_stats *stats = &p->stats;
struct proto *p = ah->proto;
struct filter *filter = ah->out_filter;
struct proto_stats *stats = ah->stats;
rte *new0 = new;
rte *old0 = old;
int ok;
#ifdef CONFIG_PIPE
/* The secondary direction of the pipe */
if (proto_is_pipe(p) && (p->table != a->table))
{
filter = p->in_filter;
stats = pipe_get_peer_stats(p);
}
#endif
if (new)
{
stats->exp_updates_received++;
@ -294,18 +286,18 @@ do_rte_announce(struct announce_hook *a, int type UNUSED, net *net, rte *new, rt
rte_trace_out(D_ROUTES, p, old, "removed");
}
if (!new)
p->rt_notify(p, a->table, net, NULL, old, NULL);
p->rt_notify(p, ah->table, net, NULL, old, NULL);
else if (tmpa)
{
ea_list *t = tmpa;
while (t->next)
t = t->next;
t->next = new->attrs->eattrs;
p->rt_notify(p, a->table, net, new, old, tmpa);
p->rt_notify(p, ah->table, net, new, old, tmpa);
t->next = NULL;
}
else
p->rt_notify(p, a->table, net, new, old, new->attrs->eattrs);
p->rt_notify(p, ah->table, net, new, old, new->attrs->eattrs);
if (new && new != new0) /* Discard temporary rte's */
rte_free(new);
if (old && old != old0)
@ -375,7 +367,7 @@ rte_validate(rte *e)
if ((n->n.pxlen > BITS_PER_IP_ADDRESS) || !ip_is_prefix(n->n.prefix,n->n.pxlen))
{
log(L_WARN "Ignoring bogus prefix %I/%d received via %s",
n->n.prefix, n->n.pxlen, e->sender->name);
n->n.prefix, n->n.pxlen, e->sender->proto->name);
return 0;
}
@ -383,7 +375,7 @@ rte_validate(rte *e)
if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
{
log(L_WARN "Ignoring bogus route %I/%d received via %s",
n->n.prefix, n->n.pxlen, e->sender->name);
n->n.prefix, n->n.pxlen, e->sender->proto->name);
return 0;
}
@ -423,18 +415,15 @@ rte_same(rte *x, rte *y)
}
static void
rte_recalculate(rtable *table, net *net, struct proto *p, struct proto *src, rte *new, ea_list *tmpa)
rte_recalculate(struct announce_hook *ah, net *net, rte *new, ea_list *tmpa, struct proto *src)
{
struct proto_stats *stats = &p->stats;
struct proto *p = ah->proto;
struct rtable *table = ah->table;
struct proto_stats *stats = ah->stats;
rte *old_best = net->routes;
rte *old = NULL;
rte **k, *r, *s;
#ifdef CONFIG_PIPE
if (proto_is_pipe(p) && (p->table == table))
stats = pipe_get_peer_stats(p);
#endif
k = &net->routes; /* Find and remove original route from the same protocol */
while (old = *k)
{
@ -449,7 +438,7 @@ rte_recalculate(rtable *table, net *net, struct proto *p, struct proto *src, rte
* ignore it completely (there might be 'spurious withdraws',
* see FIXME in do_rte_announce())
*/
if (old->sender != p)
if (old->sender->proto != p)
{
if (new)
{
@ -613,6 +602,7 @@ rte_update_unlock(void)
/**
* rte_update - enter a new update to a routing table
* @table: table to be updated
* @ah: pointer to table announce hook
* @net: network node
* @p: protocol submitting the update
* @src: protocol originating the update
@ -652,28 +642,17 @@ rte_update_unlock(void)
*/
void
rte_update(rtable *table, net *net, struct proto *p, struct proto *src, rte *new)
rte_update2(struct announce_hook *ah, net *net, rte *new, struct proto *src)
{
struct proto *p = ah->proto;
struct proto_stats *stats = ah->stats;
struct filter *filter = ah->in_filter;
ea_list *tmpa = NULL;
struct proto_stats *stats = &p->stats;
#ifdef CONFIG_PIPE
if (proto_is_pipe(p) && (p->table == table))
stats = pipe_get_peer_stats(p);
#endif
rte_update_lock();
if (new)
{
new->sender = p;
struct filter *filter = p->in_filter;
/* Do not filter routes going through the pipe,
they are filtered in the export filter only. */
#ifdef CONFIG_PIPE
if (proto_is_pipe(p))
filter = FILTER_ACCEPT;
#endif
new->sender = ah;
stats->imp_updates_received++;
if (!rte_validate(new))
@ -710,13 +689,13 @@ rte_update(rtable *table, net *net, struct proto *p, struct proto *src, rte *new
else
stats->imp_withdraws_received++;
rte_recalculate(table, net, p, src, new, tmpa);
rte_recalculate(ah, net, new, tmpa, src);
rte_update_unlock();
return;
drop:
rte_free(new);
rte_recalculate(table, net, p, src, NULL, NULL);
rte_recalculate(ah, net, NULL, NULL, src);
rte_update_unlock();
}
@ -739,7 +718,7 @@ void
rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */
{
rte_update_lock();
rte_recalculate(t, old->net, old->sender, old->attrs->proto, NULL, NULL);
rte_recalculate(old->sender, old->net, NULL, NULL, old->attrs->proto);
rte_update_unlock();
}
@ -912,8 +891,8 @@ again:
ncnt++;
rescan:
for (e=n->routes; e; e=e->next, rcnt++)
if (e->sender->core_state != FS_HAPPY &&
e->sender->core_state != FS_FEEDING)
if (e->sender->proto->core_state != FS_HAPPY &&
e->sender->proto->core_state != FS_FEEDING)
{
rte_discard(tab, e);
rdel++;
@ -1026,7 +1005,7 @@ rt_next_hop_update_net(rtable *tab, net *n)
*k = new;
rte_announce_i(tab, RA_ANY, n, new, e);
rte_trace_in(D_ROUTES, new->sender, new, "updated");
rte_trace_in(D_ROUTES, new->sender->proto, new, "updated");
/* Call a pre-comparison hook */
/* Not really an efficient way to compute this */
@ -1066,7 +1045,7 @@ rt_next_hop_update_net(rtable *tab, net *n)
if (new != old_best)
{
rte_announce_i(tab, RA_OPTIMAL, n, new, old_best);
rte_trace_in(D_ROUTES, new->sender, new, "updated [best]");
rte_trace_in(D_ROUTES, new->sender->proto, new, "updated [best]");
}
if (free_old_best)
@ -1693,6 +1672,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
{
rte *e, *ee;
byte ia[STD_ADDRESS_P_LENGTH+8];
struct announce_hook *a;
int ok;
bsprintf(ia, "%I/%d", n->n.prefix, n->n.pxlen);
@ -1722,8 +1702,8 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
'configure soft' command may change the export filter
and do not update routes */
if ((p1->out_filter == FILTER_REJECT) ||
(p1->out_filter && f_run(p1->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT))
if ((a = proto_find_announce_hook(p1, d->table)) && ((a->out_filter == FILTER_REJECT) ||
(a->out_filter && f_run(a->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) > F_ACCEPT)))
ok = 0;
}
}

2
proto/bgp/bgp.c
View file

@ -1125,6 +1125,8 @@ bgp_show_proto_info(struct proto *P)
struct bgp_proto *p = (struct bgp_proto *) P;
struct bgp_conn *c = p->conn;
proto_show_basic_info(P);
cli_msg(-1006, " BGP state: %s", bgp_state_dsc(p));
cli_msg(-1006, " Neighbor address: %I%J", p->cf->remote_ip, p->cf->iface);
cli_msg(-1006, " Neighbor AS: %u", p->remote_as);

189
proto/pipe/pipe.c
View file

@ -16,6 +16,17 @@
*
* To avoid pipe loops, Pipe keeps a `being updated' flag in each routing
* table.
*
* A pipe has two announce hooks, the first connected to the main
* table, the second connected to the peer table. When a new route is
* announced on the main table, it gets checked by an export filter in
* ahook 1, and, after that, it is announced to the peer table via
* rte_update(), an import filter in ahook 2 is called. When a new
* route is announced in the peer table, an export filter in ahook2
* and an import filter in ahook 1 are used. Oviously, there is no
* need in filtering the same route twice, so both import filters
* are set to accept, while user configured 'import' and 'export'
* filters are used as export filters in ahooks 2 and 1.
*/
#undef LOCAL_DEBUG
@ -24,6 +35,7 @@
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "nest/cli.h"
#include "conf/conf.h"
#include "filter/filter.h"
#include "lib/string.h"
@ -34,7 +46,8 @@ static void
pipe_rt_notify(struct proto *P, rtable *src_table, net *n, rte *new, rte *old, ea_list *attrs)
{
struct pipe_proto *p = (struct pipe_proto *) P;
rtable *dest = (src_table == P->table) ? p->peer : P->table; /* The other side of the pipe */
struct announce_hook *ah = (src_table == P->table) ? p->peer_ahook : P->main_ahook;
rtable *dst_table = ah->table;
struct proto *src;
net *nn;
@ -44,13 +57,14 @@ pipe_rt_notify(struct proto *P, rtable *src_table, net *n, rte *new, rte *old, e
if (!new && !old)
return;
if (dest->pipe_busy)
if (dst_table->pipe_busy)
{
log(L_ERR "Pipe loop detected when sending %I/%d to table %s",
n->n.prefix, n->n.pxlen, dest->name);
n->n.prefix, n->n.pxlen, dst_table->name);
return;
}
nn = net_get(dest, n->n.prefix, n->n.pxlen);
nn = net_get(dst_table, n->n.prefix, n->n.pxlen);
if (new)
{
memcpy(&a, new->attrs, sizeof(rta));
@ -85,14 +99,14 @@ pipe_rt_notify(struct proto *P, rtable *src_table, net *n, rte *new, rte *old, e
}
src_table->pipe_busy = 1;
rte_update(dest, nn, &p->p, (p->mode == PIPE_OPAQUE) ? &p->p : src, e);
rte_update2(ah, nn, e, (p->mode == PIPE_OPAQUE) ? &p->p : src);
src_table->pipe_busy = 0;
}
static int
pipe_import_control(struct proto *P, rte **ee, ea_list **ea UNUSED, struct linpool *p UNUSED)
{
struct proto *pp = (*ee)->sender;
struct proto *pp = (*ee)->sender->proto;
if (pp == P)
return -1; /* Avoid local loops automatically */
@ -112,20 +126,39 @@ pipe_reload_routes(struct proto *P)
return 1;
}
static struct proto *
pipe_init(struct proto_config *C)
{
struct pipe_config *c = (struct pipe_config *) C;
struct proto *P = proto_new(C, sizeof(struct pipe_proto));
struct pipe_proto *p = (struct pipe_proto *) P;
p->mode = c->mode;
p->peer_table = c->peer->table;
P->accept_ra_types = (p->mode == PIPE_OPAQUE) ? RA_OPTIMAL : RA_ANY;
P->rt_notify = pipe_rt_notify;
P->import_control = pipe_import_control;
P->reload_routes = pipe_reload_routes;
return P;
}
static int
pipe_start(struct proto *P)
{
struct pipe_proto *p = (struct pipe_proto *) P;
struct announce_hook *a;
/* Clean up the secondary stats */
bzero(&p->peer_stats, sizeof(struct proto_stats));
/* Lock both tables, unlock is handled in pipe_cleanup() */
rt_lock_table(P->table);
rt_lock_table(p->peer_table);
/* Lock the peer table, unlock is handled in pipe_cleanup() */
rt_lock_table(p->peer);
/* Going directly to PS_UP - prepare for feeding,
connect the protocol to both routing tables */
/* Connect the protocol also to the peer routing table. */
a = proto_add_announce_hook(P, p->peer);
P->main_ahook = proto_add_announce_hook(P, P->table,
FILTER_ACCEPT, P->cf->out_filter, &P->stats);
p->peer_ahook = proto_add_announce_hook(P, p->peer_table,
FILTER_ACCEPT, P->cf->in_filter, &p->peer_stats);
return PS_UP;
}
@ -134,24 +167,15 @@ static void
pipe_cleanup(struct proto *P)
{
struct pipe_proto *p = (struct pipe_proto *) P;
rt_unlock_table(p->peer);
}
static struct proto *
pipe_init(struct proto_config *C)
{
struct pipe_config *c = (struct pipe_config *) C;
struct proto *P = proto_new(C, sizeof(struct pipe_proto));
struct pipe_proto *p = (struct pipe_proto *) P;
bzero(&P->stats, sizeof(struct proto_stats));
bzero(&p->peer_stats, sizeof(struct proto_stats));
p->peer = c->peer->table;
p->mode = c->mode;
P->accept_ra_types = (p->mode == PIPE_OPAQUE) ? RA_OPTIMAL : RA_ANY;
P->rt_notify = pipe_rt_notify;
P->import_control = pipe_import_control;
P->reload_routes = pipe_reload_routes;
P->main_ahook = NULL;
p->peer_ahook = NULL;
return P;
rt_unlock_table(P->table);
rt_unlock_table(p->peer_table);
}
static void
@ -165,16 +189,34 @@ pipe_postconfig(struct proto_config *C)
cf_error("Primary table and peer table must be different");
}
extern int proto_reconfig_type;
static int
pipe_reconfigure(struct proto *P, struct proto_config *new)
{
// struct pipe_proto *p = (struct pipe_proto *) P;
struct pipe_config *o = (struct pipe_config *) P->cf;
struct pipe_config *n = (struct pipe_config *) new;
struct pipe_proto *p = (struct pipe_proto *)P;
struct proto_config *old = P->cf;
struct pipe_config *oc = (struct pipe_config *) old;
struct pipe_config *nc = (struct pipe_config *) new;
if ((o->peer->table != n->peer->table) || (o->mode != n->mode))
if ((oc->peer->table != nc->peer->table) || (oc->mode != nc->mode))
return 0;
/* Update output filters in ahooks */
if (P->main_ahook)
P->main_ahook->out_filter = new->out_filter;
if (p->peer_ahook)
p->peer_ahook->out_filter = new->in_filter;
if ((P->proto_state != PS_UP) || (proto_reconfig_type == RECONFIG_SOFT))
return 1;
if ((new->preference != old->preference)
|| ! filter_same(new->in_filter, old->in_filter)
|| ! filter_same(new->out_filter, old->out_filter))
proto_request_feeding(P);
return 1;
}
@ -190,19 +232,80 @@ pipe_get_status(struct proto *P, byte *buf)
{
struct pipe_proto *p = (struct pipe_proto *) P;
bsprintf(buf, "%c> %s", (p->mode == PIPE_OPAQUE) ? '-' : '=', p->peer->name);
bsprintf(buf, "%c> %s", (p->mode == PIPE_OPAQUE) ? '-' : '=', p->peer_table->name);
}
static void
pipe_show_stats(struct pipe_proto *p)
{
struct proto_stats *s1 = &p->p.stats;
struct proto_stats *s2 = &p->peer_stats;
/*
* Pipe stats (as anything related to pipes) are a bit tricky. There
* are two sets of stats - s1 for ahook to the primary routing and
* s2 for the ahook to the secondary routing table. The user point
* of view is that routes going from the primary routing table to
* the secondary routing table are 'exported', while routes going in
* the other direction are 'imported'.
*
* Each route going through a pipe is, technically, first exported
* to the pipe and then imported from that pipe and such operations
* are counted in one set of stats according to the direction of the
* route propagation. Filtering is done just in the first part
* (export). Therefore, we compose stats for one directon for one
* user direction from both import and export stats, skipping
* immediate and irrelevant steps (exp_updates_accepted,
* imp_updates_received, imp_updates_filtered, ...).
*
* Rule of thumb is that stats s1 have the correct 'polarity'
* (imp/exp), while stats s2 have switched 'polarity'.
*/
cli_msg(-1006, " Routes: %u imported, %u exported",
s1->imp_routes, s2->imp_routes);
cli_msg(-1006, " Route change stats: received rejected filtered ignored accepted");
cli_msg(-1006, " Import updates: %10u %10u %10u %10u %10u",
s2->exp_updates_received, s2->exp_updates_rejected + s1->imp_updates_invalid,
s2->exp_updates_filtered, s1->imp_updates_ignored, s1->imp_updates_accepted);
cli_msg(-1006, " Import withdraws: %10u %10u --- %10u %10u",
s2->exp_withdraws_received, s1->imp_withdraws_invalid,
s1->imp_withdraws_ignored, s1->imp_withdraws_accepted);
cli_msg(-1006, " Export updates: %10u %10u %10u %10u %10u",
s1->exp_updates_received, s1->exp_updates_rejected + s2->imp_updates_invalid,
s1->exp_updates_filtered, s2->imp_updates_ignored, s2->imp_updates_accepted);
cli_msg(-1006, " Export withdraws: %10u %10u --- %10u %10u",
s1->exp_withdraws_received, s2->imp_withdraws_invalid,
s2->imp_withdraws_ignored, s2->imp_withdraws_accepted);
}
static void
pipe_show_proto_info(struct proto *P)
{
struct pipe_proto *p = (struct pipe_proto *) P;
// cli_msg(-1006, " Table: %s", P->table->name);
// cli_msg(-1006, " Peer table: %s", p->peer_table->name);
cli_msg(-1006, " Preference: %d", P->preference);
cli_msg(-1006, " Input filter: %s", filter_name(P->cf->in_filter));
cli_msg(-1006, " Output filter: %s", filter_name(P->cf->out_filter));
if (P->proto_state != PS_DOWN)
pipe_show_stats(p);
}
struct protocol proto_pipe = {
name: "Pipe",
template: "pipe%d",
preference: DEF_PREF_PIPE,
postconfig: pipe_postconfig,
init: pipe_init,
start: pipe_start,
cleanup: pipe_cleanup,
reconfigure: pipe_reconfigure,
copy_config: pipe_copy_config,
get_status: pipe_get_status,
name: "Pipe",
template: "pipe%d",
multitable: 1,
preference: DEF_PREF_PIPE,
postconfig: pipe_postconfig,
init: pipe_init,
start: pipe_start,
cleanup: pipe_cleanup,
reconfigure: pipe_reconfigure,
copy_config: pipe_copy_config,
get_status: pipe_get_status,
show_proto_info: pipe_show_proto_info
};

9
proto/pipe/pipe.h
View file

@ -20,7 +20,8 @@ struct pipe_config {
struct pipe_proto {
struct proto p;
struct rtable *peer;
struct rtable *peer_table;
struct announce_hook *peer_ahook; /* Announce hook for direction peer->primary */
struct proto_stats peer_stats; /* Statistics for the direction peer->primary */
int mode; /* PIPE_OPAQUE or PIPE_TRANSPARENT */
};
@ -31,10 +32,4 @@ extern struct protocol proto_pipe;
static inline int proto_is_pipe(struct proto *p)
{ return p->proto == &proto_pipe; }
static inline struct rtable * pipe_get_peer_table(struct proto *P)
{ return ((struct pipe_proto *) P)->peer; }
static inline struct proto_stats * pipe_get_peer_stats(struct proto *P)
{ return &((struct pipe_proto *) P)->peer_stats; }
#endif