dnsmasq/SOURCES/dnsmasq-2.76-rh1728698-3.patch

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2020-01-21 15:38:48 +00:00
From 527029312cbe37c0285240943ad02352d64d403d Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Tue, 9 Jul 2019 14:05:59 +0200
Subject: [PATCH 3/5] Cleanup interfaces no longer available
Clean addresses and interfaces not found after enumerate. Free unused
records to speed up checking active interfaces and reduce used memory.
---
src/network.c | 32 ++++++++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/src/network.c b/src/network.c
index f247811..d6d4b01 100644
--- a/src/network.c
+++ b/src/network.c
@@ -553,7 +553,30 @@ static int iface_allowed_v4(struct in_addr local, int if_index, char *label,
return iface_allowed((struct iface_param *)vparam, if_index, label, &addr, netmask, prefix, 0);
}
-
+
+/*
+ * Clean old interfaces no longer found.
+ */
+static void clean_interfaces()
+{
+ struct irec *iface;
+ struct irec **up = &daemon->interfaces;
+
+ for (iface = *up; iface; iface = *up)
+ {
+ if (!iface->found && !iface->done)
+ {
+ *up = iface->next;
+ free(iface->name);
+ free(iface);
+ }
+ else
+ {
+ up = &iface->next;
+ }
+ }
+}
+
int enumerate_interfaces(int reset)
{
static struct addrlist *spare = NULL;
@@ -653,6 +676,7 @@ int enumerate_interfaces(int reset)
in OPT_CLEVERBIND mode, that at listener will just disappear after
a call to enumerate_interfaces, this is checked OK on all calls. */
struct listener *l, *tmp, **up;
+ int freed = 0;
for (up = &daemon->listeners, l = daemon->listeners; l; l = tmp)
{
@@ -682,10 +706,14 @@ int enumerate_interfaces(int reset)
close(l->tftpfd);
free(l);
+ freed = 1;
}
}
+
+ if (freed)
+ clean_interfaces();
}
-
+
errno = errsave;
spare = param.spare;
--
2.20.1