In order to make ulogd fully reconfigurable without restarting this
patch does some introductory work letting plugins be able to be
flagged as reconfigurable.
Signed-off-by: Holger Eitzenberger <holger@xxxxxxxxxxxxxxxx>
Index: ulogd-netfilter/include/ulogd/ulogd.h
===================================================================
--- ulogd-netfilter.orig/include/ulogd/ulogd.h
+++ ulogd-netfilter/include/ulogd/ulogd.h
@@ -125,6 +125,10 @@ struct ulogd_keyset {
struct ulogd_pluginstance_stack;
struct ulogd_pluginstance;
+
+/* plugin flags */
+#define ULOGD_PF_RECONF 0x00000001
+
struct ulogd_plugin {
/* global list of plugins */
struct llist_head list;
@@ -135,6 +139,8 @@ struct ulogd_plugin {
/* ID for this plugin (dynamically assigned) */
unsigned int id;
+ unsigned flags;
+
struct ulogd_keyset input;
struct ulogd_keyset output;
Index: ulogd-netfilter/src/ulogd.c
===================================================================
--- ulogd-netfilter.orig/src/ulogd.c
+++ ulogd-netfilter/src/ulogd.c
@@ -218,6 +218,23 @@ int ulogd_wildcard_inputkeys(struct ulog
return 0;
}
+/*
+ ulogd_pluginstance_reset_cfg() - reset to default config
+*/
+int
+ulogd_pluginstance_reset_cfg(const struct ulogd_pluginstance *pi)
+{
+ size_t size;
+
+ assert(pi->plugin != NULL);
+
+ size = sizeof(struct config_keyset)
+ + pi->plugin->config_kset->num_ces * sizeof(struct config_entry);
+
+ memcpy(pi->config_kset, pi->plugin->config_kset, size);
+
+ return 0;
+}
/***********************************************************************
* PLUGIN MANAGEMENT
@@ -823,6 +840,69 @@ for_each_pluginstance(int (* cb)(struct
return sum;
}
+enum ReconfOp
+{
+ INVAL = 0,
+ STOP,
+ CONFIGURE,
+ START,
+};
+
+static int
+_do_reconf(struct ulogd_pluginstance *pi,
+ struct ulogd_pluginstance_stack *stack, void *arg)
+{
+ enum ReconfOp op = (unsigned)arg;
+ int ret = 0;
+
+ assert(pi != NULL);
+
+ if ((pi->plugin->flags & ULOGD_PF_RECONF) == 0)
+ return 0;
+
+ switch (op) {
+ case STOP:
+ ret = pi->plugin->stop(pi);
+ break;
+
+ case CONFIGURE:
+ ulogd_pluginstance_reset_cfg(pi);
+ ret = pi->plugin->configure(pi, stack);
+ break;
+
+ case START:
+ ret = pi->plugin->start(pi);
+ break;
+
+ default:
+ return -1;
+ }
+
+ if (ret < 0) {
+ ulogd_log(ULOGD_FATAL, "reconfiguring '%s' failed\n", pi->id);
+ return -1;
+ }
+
+ return 1;
+}
+
+static int
+reconfigure_plugins(void)
+{
+ ulogd_log(ULOGD_INFO, "reconfiguring plugins\n");
+
+ if (for_each_pluginstance(_do_reconf, (void *)STOP) < 0)
+ abort();
+
+ if (for_each_pluginstance(_do_reconf, (void *)CONFIGURE) < 0)
+ abort();
+
+ if (for_each_pluginstance(_do_reconf, (void *)START) < 0)
+ abort();
+
+ return 0;
+}
+
static int
_do_signal(struct ulogd_pluginstance *pi,
struct ulogd_pluginstance_stack *stack, void *arg)
@@ -845,6 +925,7 @@ sync_sig_handler(int signo)
switch (signo) {
case SIGHUP:
+ reconfigure_plugins();
break;
case SIGALRM:
--
-
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