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Nest: moved sender channel to the route rw structure

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It is needed for early pipe collision detection and it also reduces
the calling convention of rte_update() to one argument.
This commit is contained in:
Maria Matejka 2020-05-01 22:44:20 +02:00
parent a89cf0525a
commit 28e81229a8
12 changed files with 60 additions and 41 deletions
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9
nest/route.h
View File

@ -231,6 +231,7 @@ typedef struct rte {
struct rta *attrs; /* Attributes of this route */ struct rta *attrs; /* Attributes of this route */
const net_addr *net; /* Network this RTE belongs to */ const net_addr *net; /* Network this RTE belongs to */
struct rte_src *src; /* Route source that created the route */ struct rte_src *src; /* Route source that created the route */
struct channel *sender; /* Channel used to send the route to the routing table */
byte flags; /* Flags (REF_...) */ byte flags; /* Flags (REF_...) */
byte pflags; /* Protocol-specific flags */ byte pflags; /* Protocol-specific flags */
} rte; } rte;
@ -241,8 +242,8 @@ struct rte_storage {
struct rta *attrs; /* Attributes of this route */ struct rta *attrs; /* Attributes of this route */
net *net; /* Network this RTE belongs to */ net *net; /* Network this RTE belongs to */
struct rte_src *src; /* Route source that created the route */ struct rte_src *src; /* Route source that created the route */
struct channel *sender; /* Channel used to send the route to the routing table */ struct channel *sender; /* Channel used to send the route to the routing table */
u32 id; /* Table specific route id */ u32 id; /* Table specific route id */
byte flags; /* Flags (REF_...) */ byte flags; /* Flags (REF_...) */
byte pflags; /* Protocol-specific flags */ byte pflags; /* Protocol-specific flags */
@ -300,7 +301,6 @@ struct rte_export {
/** /**
* rte_update - enter a new update to a routing table * rte_update - enter a new update to a routing table
* @c: channel doing the update
* @rte: a &rte representing the new route * @rte: a &rte representing the new route
* *
* This function imports a new route to the appropriate table (via the channel). * This function imports a new route to the appropriate table (via the channel).
@ -326,10 +326,10 @@ struct rte_export {
* All memory used for temporary allocations is taken from a special linpool * All memory used for temporary allocations is taken from a special linpool
* @rte_update_pool and freed when rte_update() finishes. * @rte_update_pool and freed when rte_update() finishes.
*/ */
void rte_update(struct channel *c, struct rte *rte) NONNULL(1,2); void rte_update(struct rte *rte) NONNULL(1);
static inline void rte_withdraw(struct channel *c, const net_addr *net, struct rte_src *src) static inline void rte_withdraw(struct channel *c, const net_addr *net, struct rte_src *src)
{ {
rte e = { .net = net, .src = src}; rte_update(c, &e); rte e = { .sender = c, .net = net, .src = src}; rte_update(&e);
} }
extern list routing_tables; extern list routing_tables;
@ -365,6 +365,7 @@ static inline rte rte_copy(const struct rte_storage *r)
.attrs = r->attrs, .attrs = r->attrs,
.net = r->net->n.addr, .net = r->net->n.addr,
.src = r->src, .src = r->src,
.sender = r->sender,
.flags = r->flags, .flags = r->flags,
.pflags = r->pflags .pflags = r->pflags
} : (rte) {}; } : (rte) {};

3
nest/rt-dev.c
View File

@ -87,8 +87,9 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
.src = rt_get_source(P, ad->iface->index), .src = rt_get_source(P, ad->iface->index),
.net = net, .net = net,
.attrs = &a0, .attrs = &a0,
.sender = c,
}; };
rte_update(c, &e0); rte_update(&e0);
} }
} }

47
nest/rt-table.c
View File

@ -291,6 +291,7 @@ rte_store(const rte *r, net *n)
.attrs = r->attrs, .attrs = r->attrs,
.net = n, .net = n,
.src = r->src, .src = r->src,
.sender = r->sender,
}; };
rt_lock_source(e->src); rt_lock_source(e->src);
@ -306,7 +307,6 @@ rte_store(const rte *r, net *n)
void void
rte_copy_metadata(struct rte_storage *dest, struct rte_storage *src) rte_copy_metadata(struct rte_storage *dest, struct rte_storage *src)
{ {
dest->sender = src->sender;
dest->flags = src->flags & REF_FILTERED; dest->flags = src->flags & REF_FILTERED;
dest->pflags = src->pflags; dest->pflags = src->pflags;
dest->lastmod = src->lastmod; dest->lastmod = src->lastmod;
@ -891,9 +891,10 @@ rte_same(struct rte_storage *x, rte *y, _Bool fy)
rte_is_filtered(x) == fy; rte_is_filtered(x) == fy;
} }
static void NONNULL(1,2,3) static void NONNULL(1,2)
rte_recalculate(struct channel *c, net *net, rte *new, _Bool filtered) rte_recalculate(net *net, rte *new, _Bool filtered)
{ {
struct channel *c = new->sender;
struct proto *p = c->proto; struct proto *p = c->proto;
struct rtable *table = c->table; struct rtable *table = c->table;
struct proto_stats *stats = &c->stats; struct proto_stats *stats = &c->stats;
@ -1028,7 +1029,6 @@ rte_recalculate(struct channel *c, net *net, rte *new, _Bool filtered)
if (new->attrs) { if (new->attrs) {
new_stored = rte_store(new, net); new_stored = rte_store(new, net);
new_stored->sender = c;
if (filtered) if (filtered)
new_stored->flags |= REF_FILTERED; new_stored->flags |= REF_FILTERED;
@ -1184,31 +1184,33 @@ rte_update_unlock(void)
lp_flush(rte_update_pool); lp_flush(rte_update_pool);
} }
static int NONNULL(1,2) rte_update_in(struct channel *c, rte *new); static int NONNULL(1) rte_update_in(rte *new);
static void NONNULL(1,2) rte_update2(struct channel *c, rte *new); static void NONNULL(1) rte_update2(rte *new);
void NONNULL(1,2) void NONNULL(1)
rte_update(struct channel *c, rte *new) rte_update(rte *new)
{ {
ASSERT(c->channel_state == CS_UP); ASSERT(new->sender);
ASSERT(new->sender->channel_state == CS_UP);
ASSERT(new->net); ASSERT(new->net);
ASSERT(new->src); ASSERT(new->src);
if (new->attrs && !new->attrs->pref) if (new->attrs && !new->attrs->pref)
{ {
ASSERT(!new->attrs->cached); ASSERT(!new->attrs->cached);
new->attrs->pref = c->preference; new->attrs->pref = new->sender->preference;
} }
if (c->in_table && !rte_update_in(c, new)) if (new->sender->in_table && !rte_update_in(new))
return; return;
rte_update2(c, new); rte_update2(new);
} }
static void NONNULL(1,2) static void NONNULL(1)
rte_update2(struct channel *c, rte *new) rte_update2(rte *new)
{ {
struct channel *c = new->sender;
// struct proto *p = c->proto; // struct proto *p = c->proto;
struct proto_stats *stats = &c->stats; struct proto_stats *stats = &c->stats;
const struct filter *filter = c->in_filter; const struct filter *filter = c->in_filter;
@ -1288,7 +1290,7 @@ rte_update2(struct channel *c, rte *new)
} }
/* And recalculate the best route */ /* And recalculate the best route */
rte_recalculate(c, nn, new, filtered); rte_recalculate(nn, new, filtered);
rte_update_unlock(); rte_update_unlock();
return; return;
@ -1327,10 +1329,11 @@ rte_modify(struct rte_storage *old)
.net = old->net->n.addr, .net = old->net->n.addr,
.src = old->src, .src = old->src,
.attrs = old->sender->proto->rte_modify(old, rte_update_pool), .attrs = old->sender->proto->rte_modify(old, rte_update_pool),
.sender = old->sender,
}; };
if (new.attrs != old->attrs) if (new.attrs != old->attrs)
rte_recalculate(old->sender, old->net, &new, old->src); rte_recalculate(old->net, &new, old->src);
rte_update_unlock(); rte_update_unlock();
} }
@ -1682,8 +1685,8 @@ again:
/* Discard the route */ /* Discard the route */
rte_update_lock(); rte_update_lock();
rte ew = { .net = e->net->n.addr, .src = e->src }; rte ew = { .net = e->net->n.addr, .src = e->src, .sender = e->sender, };
rte_recalculate(e->sender, e->net, &ew, 0); rte_recalculate(e->net, &ew, 0);
rte_update_unlock(); rte_update_unlock();
limit--; limit--;
@ -1880,6 +1883,7 @@ rt_next_hop_update_rte(struct rte_storage *old)
.attrs = a, .attrs = a,
.net = old->net->n.addr, .net = old->net->n.addr,
.src = old->src, .src = old->src,
.sender = old->sender,
}; };
rte_trace_in(D_ROUTES, old->sender, &e, "updated"); rte_trace_in(D_ROUTES, old->sender, &e, "updated");
@ -2240,8 +2244,9 @@ rt_feed_channel_abort(struct channel *c)
*/ */
static int static int
rte_update_in(struct channel *c, rte *new) rte_update_in(rte *new)
{ {
struct channel *c = new->sender;
struct rtable *tab = c->in_table; struct rtable *tab = c->in_table;
struct rte_storage *old, **pos; struct rte_storage *old, **pos;
net *net; net *net;
@ -2312,7 +2317,6 @@ rte_update_in(struct channel *c, rte *new)
/* Insert the new rte */ /* Insert the new rte */
struct rte_storage *e = rte_store(new, net); struct rte_storage *e = rte_store(new, net);
e->sender = c;
e->lastmod = current_time(); e->lastmod = current_time();
e->next = *pos; e->next = *pos;
*pos = e; *pos = e;
@ -2356,7 +2360,7 @@ rt_reload_channel(struct channel *c)
} }
rte eloc = rte_copy(e); rte eloc = rte_copy(e);
rte_update2(c, &eloc); rte_update2(&eloc);
} }
c->reload_next_rte = NULL; c->reload_next_rte = NULL;
@ -2508,7 +2512,6 @@ rte_update_out(struct channel *c, struct rte_export_internal *e)
if (new->attrs) if (new->attrs)
{ {
struct rte_storage *es = rte_store(new, net); struct rte_storage *es = rte_store(new, net);
es->sender = c;
es->lastmod = current_time(); es->lastmod = current_time();
es->id = e->new->id; es->id = e->new->id;
es->next = *pos; es->next = *pos;

6
proto/babel/babel.c
View File

@ -674,10 +674,11 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
.net = e->n.addr, .net = e->n.addr,
.src = p->p.main_source, .src = p->p.main_source,
.attrs = &a0, .attrs = &a0,
.sender = c,
}; };
e->unreachable = 0; e->unreachable = 0;
rte_update(c, &e0); rte_update(&e0);
} }
else if (e->valid && (e->router_id != p->router_id)) else if (e->valid && (e->router_id != p->router_id))
{ {
@ -693,10 +694,11 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
.net = e->n.addr, .net = e->n.addr,
.src = p->p.main_source, .src = p->p.main_source,
.attrs = &a0, .attrs = &a0,
.sender = c,
}; };
e->unreachable = 1; e->unreachable = 1;
rte_update(c, &e0); rte_update(&e0);
} }
else else
{ {

3
proto/bgp/packets.c
View File

@ -1362,9 +1362,10 @@ bgp_rte_update(struct bgp_parse_state *s, net_addr *n, u32 path_id, rta *a0)
.net = n, .net = n,
.src = s->last_src, .src = s->last_src,
.attrs = s->cached_rta, .attrs = s->cached_rta,
.sender = &(s->channel->c),
}; };
rte_update(&(s->channel->c), &e0); rte_update(&e0);
} }
static void static void

3
proto/ospf/rt.c
View File

@ -2099,6 +2099,7 @@ again1:
.attrs = rta_lookup(&a0), .attrs = rta_lookup(&a0),
.src = p->p.main_source, .src = p->p.main_source,
.net = nf->fn.addr, .net = nf->fn.addr,
.sender = p->p.main_channel,
}; };
rta_free(nf->old_rta); rta_free(nf->old_rta);
@ -2107,7 +2108,7 @@ again1:
DBG("Mod rte type %d - %N via %I on iface %s, met %d\n", DBG("Mod rte type %d - %N via %I on iface %s, met %d\n",
a0.source, nf->fn.addr, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1); a0.source, nf->fn.addr, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1);
rte_update(p->p.main_channel, &e0); rte_update(&e0);
} }
} }
else if (nf->old_rta) else if (nf->old_rta)

3
proto/perf/perf.c
View File

@ -166,8 +166,9 @@ perf_loop(void *data)
.attrs = p->data[i].a, .attrs = p->data[i].a,
.src = p->p.main_source, .src = p->p.main_source,
.net = &(p->data[i].net), .net = &(p->data[i].net),
.sender = P->main_channel,
}; };
rte_update(P->main_channel, &e0); rte_update(&e0);
} }
clock_gettime(CLOCK_MONOTONIC, &ts_update); clock_gettime(CLOCK_MONOTONIC, &ts_update);

9
proto/pipe/pipe.c
View File

@ -78,10 +78,11 @@ pipe_rt_notify(struct channel *src_ch, struct rte_export *export)
.attrs = a, .attrs = a,
.src = export->new.src, .src = export->new.src,
.net = net, .net = net,
.sender = dst,
}; };
src_ch->table->pipe_busy = 1; src_ch->table->pipe_busy = 1;
rte_update(dst, &e0); rte_update(&e0);
src_ch->table->pipe_busy = 0; src_ch->table->pipe_busy = 0;
} }
else else
@ -93,7 +94,7 @@ pipe_rt_notify(struct channel *src_ch, struct rte_export *export)
} }
static int static int
pipe_preexport(struct channel *src_ch, rte *e UNUSED) pipe_preexport(struct channel *src_ch, rte *e)
{ {
struct pipe_proto *p = (void *) src_ch->proto; struct pipe_proto *p = (void *) src_ch->proto;
struct channel *dst = (src_ch == p->pri) ? p->sec : p->pri; struct channel *dst = (src_ch == p->pri) ? p->sec : p->pri;
@ -102,6 +103,10 @@ pipe_preexport(struct channel *src_ch, rte *e UNUSED)
if (dst->table->pipe_busy) if (dst->table->pipe_busy)
return -1; return -1;
/* Avoid direct loopbacks */
if (e->sender == src_ch)
return -1;
return 0; return 0;
} }

3
proto/rip/rip.c
View File

@ -211,9 +211,10 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
.attrs = &a0, .attrs = &a0,
.src = p->p.main_source, .src = p->p.main_source,
.net = en->n.addr, .net = en->n.addr,
.sender = p->p.main_channel,
}; };
rte_update(p->p.main_channel, &e0); rte_update(&e0);
} }
else else
rte_withdraw(p->p.main_channel, en->n.addr, p->p.main_source); rte_withdraw(p->p.main_channel, en->n.addr, p->p.main_source);

3
proto/rpki/rpki.c
View File

@ -131,9 +131,10 @@ rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_
.attrs = &a0, .attrs = &a0,
.src = p->p.main_source, .src = p->p.main_source,
.net = &pfxr->n, .net = &pfxr->n,
.sender = channel,
}; };
rte_update(channel, &e0); rte_update(&e0);
} }
void void

3
proto/static/static.c
View File

@ -105,12 +105,13 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
.attrs = a, .attrs = a,
.src = static_get_source(p, r->index), .src = static_get_source(p, r->index),
.net = r->net, .net = r->net,
.sender = p->p.main_channel,
}; };
if (r->cmds) if (r->cmds)
f_eval_rte(r->cmds, &e0, static_lp); f_eval_rte(r->cmds, &e0, static_lp);
rte_update(p->p.main_channel, &e0); rte_update(&e0);
r->state = SRS_CLEAN; r->state = SRS_CLEAN;
if (r->cmds) if (r->cmds)

3
sysdep/unix/krt.c
View File

@ -303,9 +303,10 @@ krt_learn_announce_update(struct krt_proto *p, struct rte_storage *e)
.attrs = e->attrs, .attrs = e->attrs,
.src = p->p.main_source, .src = p->p.main_source,
.net = e->net->n.addr, .net = e->net->n.addr,
.sender = p->p.main_channel,
}; };
rte_update(p->p.main_channel, &e0); rte_update(&e0);
} }
static void static void