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net/quagga: "Intern" communities in route maps

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git-svn-id: svn://svn.openwrt.org/openwrt/packages@24622 3c298f89-4303-0410-b956-a3cf2f4a3e73
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acoul 2010-12-16 17:22:50 +00:00
parent bdc7b64957
commit 404ac765a0
1 changed files with 91 additions and 0 deletions
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From patchwork Sat Jul 24 16:44:07 2010
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: [quagga-dev,8083,3/3] bgpd: "Intern" communities in route maps
Date: Sat, 24 Jul 2010 15:44:07 -0000
From: Michael Lambert <lambert@psc.edu>
X-Patchwork-Id: 253
Message-Id: <201007241836.o6OIa8gR023592@tesla.psc.edu>
To: quagga-dev@lists.quagga.net
* bgp_community.[ch]: (community_lookup) New helper function to look
up a community list in the hash table.
* bgp_routemap.c: A new community structure was being allocated for
every BGP update which matched a route map which set a community.
This behavior led to rapid growth in the memory consumed by bgpd.
Adding the communities to the hash table addresses the memory
growth, but may introduce a problem in modifying or deleting the
'set community' statement in the route map.
---
bgpd/bgp_community.c | 7 +++++++
bgpd/bgp_community.h | 1 +
bgpd/bgp_routemap.c | 8 +++++---
3 files changed, 13 insertions(+), 3 deletions(-)
--- a/bgpd/bgp_community.c
+++ b/bgpd/bgp_community.c
@@ -292,6 +292,13 @@ community_com2str (struct community *co
return str;
}
+/* Find an 'intern'ed community structure */
+struct community *
+community_lookup (struct community *com)
+{
+ return (struct community *) hash_lookup (comhash, com);
+}
+
/* Intern communities attribute. */
struct community *
community_intern (struct community *com)
--- a/bgpd/bgp_community.h
+++ b/bgpd/bgp_community.h
@@ -70,5 +70,6 @@ extern int community_include (struct com
extern void community_del_val (struct community *, u_int32_t *);
extern unsigned long community_count (void);
extern struct hash *community_hash (void);
+extern struct community *community_lookup (struct community *);
#endif /* _QUAGGA_BGP_COMMUNITY_H */
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -1389,7 +1389,7 @@ route_set_community (void *rule, struct
new = community_dup (rcs->com);
/* will be interned by caller if required */
- attr->community = new;
+ attr->community = community_intern (new);
attr->flag |= ATTR_FLAG_BIT (BGP_ATTR_COMMUNITIES);
}
@@ -1403,6 +1403,7 @@ route_set_community_compile (const char
{
struct rmap_com_set *rcs;
struct community *com = NULL;
+ struct community *comint;
char *sp;
int additive = 0;
int none = 0;
@@ -1429,8 +1430,9 @@ route_set_community_compile (const char
return NULL;
}
+ comint = community_intern (com);
rcs = XCALLOC (MTYPE_ROUTE_MAP_COMPILED, sizeof (struct rmap_com_set));
- rcs->com = com;
+ rcs->com = comint;
rcs->additive = additive;
rcs->none = none;
@@ -1493,7 +1495,7 @@ route_set_community_delete (void *rule,
}
else
{
- binfo->attr->community = new;
+ binfo->attr->community = community_intern (new);
binfo->attr->flag |= ATTR_FLAG_BIT (BGP_ATTR_COMMUNITIES);
}
}