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KRT: Remove KRF_INSTALLED flag

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The same information is stored in export_map of kernel protocol.
This commit is contained in:
Ondrej Zajicek (work) 2019-12-16 02:40:28 +01:00
parent d3aa4f2aed
commit c132acae36
2 changed files with 23 additions and 27 deletions
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1
nest/route.h
View File

@ -453,7 +453,6 @@ typedef struct rta {
#define RTD_MAX 5 #define RTD_MAX 5
/* Flags for net->n.flags, used by kernel syncer */ /* Flags for net->n.flags, used by kernel syncer */
#define KRF_INSTALLED 0x80 /* This route should be installed in the kernel */
#define KRF_SYNC_ERROR 0x40 /* Error during kernel table synchronization */ #define KRF_SYNC_ERROR 0x40 /* Error during kernel table synchronization */
#define RTAF_CACHED 1 /* This is a cached rta */ #define RTAF_CACHED 1 /* This is a cached rta */

49
sysdep/unix/krt.c
View File

@ -539,6 +539,12 @@ krt_dump_attrs(rte *e)
* Routes * Routes
*/ */
static inline int
krt_is_installed(struct krt_proto *p, rte *e)
{
return bmap_test(&p->p.main_channel->export_map, e->id);
}
static void static void
krt_flush_routes(struct krt_proto *p) krt_flush_routes(struct krt_proto *p)
{ {
@ -548,11 +554,10 @@ krt_flush_routes(struct krt_proto *p)
FIB_WALK(&t->fib, net, n) FIB_WALK(&t->fib, net, n)
{ {
rte *e = n->routes; rte *e = n->routes;
if (rte_is_valid(e) && (n->n.flags & KRF_INSTALLED)) if (rte_is_valid(e) && krt_is_installed(p, e))
{ {
/* FIXME: this does not work if gw is changed in export filter */ /* FIXME: this does not work if gw is changed in export filter */
krt_replace_rte(p, e->net, NULL, e); krt_replace_rte(p, e->net, NULL, e);
n->n.flags &= ~KRF_INSTALLED;
} }
} }
FIB_WALK_END; FIB_WALK_END;
@ -579,7 +584,7 @@ krt_export_net(struct krt_proto *p, net *net, rte **rt_free)
rte_make_tmp_attrs(&rt, krt_filter_lp, NULL); rte_make_tmp_attrs(&rt, krt_filter_lp, NULL);
/* We could run krt_preexport() here, but it is already handled by KRF_INSTALLED */ /* We could run krt_preexport() here, but it is already handled by krt_is_installed() */
if (filter == FILTER_ACCEPT) if (filter == FILTER_ACCEPT)
goto accept; goto accept;
@ -658,12 +663,12 @@ krt_got_route(struct krt_proto *p, rte *e)
if (!p->ready) if (!p->ready)
{ {
/* We wait for the initial feed to have correct KRF_INSTALLED flag */ /* We wait for the initial feed to have correct installed state */
verdict = KRF_IGNORE; verdict = KRF_IGNORE;
goto sentenced; goto sentenced;
} }
if (net->n.flags & KRF_INSTALLED) if (krt_is_installed(p, e))
{ {
rte *new, *rt_free; rte *new, *rt_free;
@ -930,22 +935,7 @@ krt_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
rte *e = *new; rte *e = *new;
if (e->attrs->src->proto == P) if (e->attrs->src->proto == P)
{
#ifdef CONFIG_SINGLE_ROUTE
/*
* Implicit withdraw - when the imported kernel route becomes the best one,
* we know that the previous one exported to the kernel was already removed,
* but if we processed the update as usual, we would send withdraw to the
* kernel, which would remove the new imported route instead.
*
* We will remove KRT_INSTALLED flag, which stops such withdraw to be
* processed in krt_rt_notify() and krt_replace_rte().
*/
if (e == e->net->routes)
e->net->n.flags &= ~KRF_INSTALLED;
#endif
return -1; return -1;
}
if (!krt_capable(e)) if (!krt_capable(e))
return -1; return -1;
@ -961,12 +951,19 @@ krt_rt_notify(struct proto *P, struct channel *ch UNUSED, net *net,
if (config->shutdown) if (config->shutdown)
return; return;
if (!(net->n.flags & KRF_INSTALLED))
old = NULL; #ifdef CONFIG_SINGLE_ROUTE
if (new) /*
net->n.flags |= KRF_INSTALLED; * Implicit withdraw - when the imported kernel route becomes the best one,
else * we know that the previous one exported to the kernel was already removed,
net->n.flags &= ~KRF_INSTALLED; * but if we processed the update as usual, we would send withdraw to the
* kernel, which would remove the new imported route instead.
*/
rte *best = net->routes;
if (!new && best && (best->attrs->src->proto == P))
return;
#endif
if (p->initialized) /* Before first scan we don't touch the routes */ if (p->initialized) /* Before first scan we don't touch the routes */
krt_replace_rte(p, net, new, old); krt_replace_rte(p, net, new, old);
} }