quotad: create sock listener only after graph init is complete

This is a backport of http://review.gluster.org/#/c/11552/

If FOPs are received before completing graph initialization,
FOP path can crash while accessing uninitialized variables

This patch fixes issue by not creating listener until
graph initialization is complete and hence not receiving
FOP request

> Change-Id: I4771e376410843dff44bfe819329a4632523d266
> BUG: 1240254
> Signed-off-by: vmallika <vmallika@redhat.com>

Change-Id: I6c5964a8334abdc26aa2813c13f09e796e22b10a
BUG: 1240906
Signed-off-by: vmallika <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/11570
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

2 files changed, 38 insertions, 4 deletions

diff --git a/xlators/features/quota/src/quotad-aggregator.c b/xlators/features/quota/src/quotad-aggregator.c
index 6c9c40a122f..8a7cfdca3f5 100644
--- a/xlators/features/quota/src/quotad-aggregator.c
+++ b/xlators/features/quota/src/quotad-aggregator.c
@@ -374,6 +374,11 @@ quotad_aggregator_init (xlator_t *this)
 
         priv = this->private;
 
+        if (priv->rpcsvc) {
+                /* Listener already created */
+                return 0;
+        }
+
         ret = dict_set_str (this->options, "transport.address-family", "unix");
         if (ret)
                 goto out;
@@ -423,6 +428,11 @@ quotad_aggregator_init (xlator_t *this)
 
         ret = 0;
 out:
+        if (ret && priv->rpcsvc) {
+                GF_FREE (priv->rpcsvc);
+                priv->rpcsvc = NULL;
+        }
+
         return ret;
 }
 
diff --git a/xlators/features/quota/src/quotad.c b/xlators/features/quota/src/quotad.c
index 243b943e986..028c8047141 100644
--- a/xlators/features/quota/src/quotad.c
+++ b/xlators/features/quota/src/quotad.c
@@ -11,6 +11,18 @@
 #include "quotad-aggregator.h"
 #include "common-utils.h"
 
+int
+qd_notify (xlator_t *this, int32_t event, void *data, ...)
+{
+        switch (event) {
+        case GF_EVENT_PARENT_UP:
+                quotad_aggregator_init (this);
+        }
+
+        default_notify (this, event, data);
+        return 0;
+}
+
 int32_t
 mem_acct_init (xlator_t *this)
 {
@@ -147,6 +159,21 @@ qd_reconfigure (xlator_t *this, dict_t *options)
 void
 qd_fini (xlator_t *this)
 {
+        quota_priv_t    *priv           = NULL;
+
+        if (this == NULL || this->private == NULL)
+                goto out;
+
+        priv = this->private;
+
+        if (priv->rpcsvc) {
+                GF_FREE (priv->rpcsvc);
+                priv->rpcsvc = NULL;
+        }
+
+        GF_FREE (priv);
+
+out:
         return;
 }
 
@@ -169,10 +196,6 @@ qd_init (xlator_t *this)
 
         this->private = priv;
 
-        ret = quotad_aggregator_init (this);
-        if (ret < 0)
-                goto err;
-
         ret = 0;
 err:
         if (ret) {
@@ -185,6 +208,7 @@ class_methods_t class_methods = {
         .init           = qd_init,
         .fini           = qd_fini,
         .reconfigure    = qd_reconfigure,
+        .notify         = qd_notify
 };
 
 struct xlator_fops fops = {