Increase size of ifindex hash heads
The default of 16 is too small for users with 10,000 interfaces.
diff --git a/lib/ll_map.c b/lib/ll_map.c
index b8b49aa..afd5e35 100644
--- a/lib/ll_map.c
+++ b/lib/ll_map.c
@@ -35,7 +35,8 @@
char name[16];
};
-static struct idxmap *idxmap[16];
+#define IDXMAP_SIZE 1024
+static struct idxmap *idxmap[IDXMAP_SIZE];
int ll_remember_index(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
@@ -51,15 +52,13 @@
if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifi)))
return -1;
-
memset(tb, 0, sizeof(tb));
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), IFLA_PAYLOAD(n));
if (tb[IFLA_IFNAME] == NULL)
return 0;
- h = ifi->ifi_index&0xF;
-
- for (imp=&idxmap[h]; (im=*imp)!=NULL; imp = &im->next)
+ h = ifi->ifi_index & (IDXMAP_SIZE - 1);
+ for (imp = &idxmap[h]; (im=*imp)!=NULL; imp = &im->next)
if (im->index == ifi->ifi_index)
break;
@@ -94,7 +93,8 @@
if (idx == 0)
return "*";
- for (im = idxmap[idx&0xF]; im; im = im->next)
+
+ for (im = idxmap[idx & (IDXMAP_SIZE - 1)]; im; im = im->next)
if (im->index == idx)
return im->name;
snprintf(buf, 16, "if%d", idx);