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-   -   cman: fix data copy and memory leak when reloading config (http://www.linux-archive.org/cluster-development/682361-cman-fix-data-copy-memory-leak-when-reloading-config.html)

"Fabio M. Di Nitto" 07-11-2012 09:46 AM

cman: fix data copy and memory leak when reloading config
 
From: "Fabio M. Di Nitto" <fdinitto@redhat.com>

cman.cluster_id,nodename,two_node information were not copied
from the old to the new config at reload time. This triggers
a problem when <cman is set in cluster.conf and we effectively
drop information from objdb (suboptimal).

Also fix a possible memory leak when we have reload issues.

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
---
cman/daemon/cman-preconfig.c | 31 +++++++++++++++++++++++++++++--
1 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/cman/daemon/cman-preconfig.c b/cman/daemon/cman-preconfig.c
index 68fec22..22583fe 100644
--- a/cman/daemon/cman-preconfig.c
+++ b/cman/daemon/cman-preconfig.c
@@ -1478,6 +1478,7 @@ static int cmanpre_reloadconfig(struct objdb_iface_ver0 *objdb, int flush, const
hdb_handle_t cluster_parent_handle_new;
unsigned int config_version = 0, config_version_new = 0;
char *config_value = NULL;
+ char str[255];

/* don't reload if we've been told to run configless */
if (getenv("CMAN_NOCONFIG")) {
@@ -1489,16 +1490,16 @@ static int cmanpre_reloadconfig(struct objdb_iface_ver0 *objdb, int flush, const
/* find both /cluster entries */
objdb->object_find_create(OBJECT_PARENT_HANDLE, "cluster", strlen("cluster"), &find_handle);
objdb->object_find_next(find_handle, &cluster_parent_handle);
+ objdb->object_find_next(find_handle, &cluster_parent_handle_new);
+ objdb->object_find_destroy(find_handle);
if (!cluster_parent_handle) {
snprintf (error_reason, sizeof(error_reason) - 1, "Cannot find old /cluster/ key in configuration
");
goto err;
}
- objdb->object_find_next(find_handle, &cluster_parent_handle_new);
if (!cluster_parent_handle_new) {
snprintf (error_reason, sizeof(error_reason) - 1, "Cannot find new /cluster/ key in configuration
");
goto err;
}
- objdb->object_find_destroy(find_handle);

if (!objdb->object_key_get(cluster_parent_handle, "config_version", strlen("config_version"), (void *)&config_value, NULL)) {
if (config_value) {
@@ -1531,6 +1532,32 @@ static int cmanpre_reloadconfig(struct objdb_iface_ver0 *objdb, int flush, const
/* destroy the old one */
objdb->object_destroy(cluster_parent_handle);

+ /*
+ * create cluster.cman in the new config if it doesn't exists
+ */
+ objdb->object_find_create(cluster_parent_handle_new, "cman", strlen("cman"), &find_handle);
+ if (objdb->object_find_next(find_handle, &object_handle)) {
+ objdb->object_create(cluster_parent_handle_new, &object_handle,
+ "cman", strlen("cman"));
+ }
+ objdb->object_find_destroy(find_handle);
+
+ /*
+ * readd cluster_id/two_node/nodename
+ */
+ snprintf(str, sizeof(str) - 1, "%d", cluster_id);
+ objdb->object_key_create_typed(object_handle, "cluster_id",
+ str, strlen(str) + 1, OBJDB_VALUETYPE_STRING);
+
+ if (two_node) {
+ snprintf(str, sizeof(str) - 1, "%d", 1);
+ objdb->object_key_create_typed(object_handle, "two_node",
+ str, strlen(str) + 1, OBJDB_VALUETYPE_STRING);
+ }
+
+ objdb->object_key_create_typed(object_handle, "nodename",
+ nodename, strlen(nodename)+1, OBJDB_VALUETYPE_STRING);
+
/* update the reference to the new config */
cluster_parent_handle = cluster_parent_handle_new;

--
1.7.7.6


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