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Minor rte/rta interface changes:

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o  rte can now contain a pointer to both cached and uncached rta. Protocols
     which don't need their own attribute caching can now just fill-in a rta,
     link it to rte without any calls to attribute cache and call rte_update()
     which will replace rte->attrs by a cached copy.

  o  In order to support this, one of previously pad bytes in struct rta
     now holds new attribute flags (RTAF_CACHED). If you call rte_update()
     with uncached rta, you _must_ clear these flags. In other cases rta_lookup()
     sets it appropriately.

  o  Added rte_free() which is useful when you construct a rte and then the
     circumstances change and you decide not to use it for an update. (Needed
     for temporary rte's in kernel syncer...)
This commit is contained in:
Martin Mares
1998-12-07 21:59:15 +00:00
parent cdc6bfa70f
commit 04925e9040
3 changed files with 20 additions and 2 deletions
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15
nest/rt-table.c
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@@ -136,8 +136,16 @@ rt_feed_baby(struct proto *p)
}
}
static inline void
void
rte_free(rte *e)
{
if (e->attrs->aflags & RTAF_CACHED)
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static inline void
rte_free_quick(rte *e)
{
rta_free(e->attrs);
sl_free(rte_slab, e);
@@ -150,6 +158,9 @@ rte_update(net *net, struct proto *p, rte *new)
rte *old = NULL;
rte **k, *r, *s;
if (new && !(new->attrs->aflags & RTAF_CACHED)) /* Need to copy attributes */
new->attrs = rta_lookup(new->attrs);
k = &net->routes; /* Find and remove original route from the same protocol */
while (old = *k)
{
@@ -202,7 +213,7 @@ rte_update(net *net, struct proto *p, rte *new)
{
if (p->rte_remove)
p->rte_remove(net, old);
rte_free(old);
rte_free_quick(old);
}
if (new)
{