storage: util: Split out the gluster volume extraction code into new function

To allow testing of the algorithm, split out the extractor into a
separate helper.

src/storage/storage_util.c

@@ -2836,6 +2836,60 @@ virStorageBackendDeleteLocal(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 
+int
+virStorageUtilGlusterExtractPoolSources(const char *host,
+                                        const char *xml,
+                                        virStoragePoolSourceListPtr list,
+                                        virStoragePoolType pooltype)
+{
+    xmlDocPtr doc = NULL;
+    xmlXPathContextPtr ctxt = NULL;
+    xmlNodePtr *nodes = NULL;
+    virStoragePoolSource *src = NULL;
+    size_t i;
+    int nnodes;
+    int ret = -1;
+
+    if (!(doc = virXMLParseStringCtxt(xml, _("(gluster_cli_output)"), &ctxt)))
+        goto cleanup;
+
+    if ((nnodes = virXPathNodeSet("//volumes/volume", ctxt, &nodes)) < 0)
+        goto cleanup;
+
+    for (i = 0; i < nnodes; i++) {
+        ctxt->node = nodes[i];
+
+        if (!(src = virStoragePoolSourceListNewSource(list)))
+            goto cleanup;
+
+        if (!(src->dir = virXPathString("string(//name)", ctxt))) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("failed to extract gluster volume name"));
+            goto cleanup;
+        }
+
+        if (pooltype == VIR_STORAGE_POOL_NETFS)
+            src->format = VIR_STORAGE_POOL_NETFS_GLUSTERFS;
+
+        if (VIR_ALLOC_N(src->hosts, 1) < 0)
+            goto cleanup;
+        src->nhost = 1;
+
+        if (VIR_STRDUP(src->hosts[0].name, host) < 0)
+            goto cleanup;
+    }
+
+    ret = nnodes;
+
+ cleanup:
+    VIR_FREE(nodes);
+    xmlXPathFreeContext(ctxt);
+    xmlFreeDoc(doc);
+
+    return ret;
+}
+
+
 /**
  * virStorageBackendFindGlusterPoolSources:
  * @host: host to detect volumes on
@@ -2860,12 +2914,6 @@ virStorageBackendFindGlusterPoolSources(const char *host,
     char *glusterpath = NULL;
     char *outbuf = NULL;
     virCommandPtr cmd = NULL;
-    xmlDocPtr doc = NULL;
-    xmlXPathContextPtr ctxt = NULL;
-    xmlNodePtr *nodes = NULL;
-    virStoragePoolSource *src = NULL;
-    size_t i;
-    int nnodes;
     int rc;
 
     int ret = -1;
@@ -2896,42 +2944,9 @@ virStorageBackendFindGlusterPoolSources(const char *host,
         goto cleanup;
     }
 
-    if (!(doc = virXMLParseStringCtxt(outbuf, _("(gluster_cli_output)"),
-                                      &ctxt)))
-        goto cleanup;
-
-    if ((nnodes = virXPathNodeSet("//volumes/volume", ctxt, &nodes)) < 0)
-        goto cleanup;
-
-    for (i = 0; i < nnodes; i++) {
-        ctxt->node = nodes[i];
-
-        if (!(src = virStoragePoolSourceListNewSource(list)))
-            goto cleanup;
-
-        if (!(src->dir = virXPathString("string(//name)", ctxt))) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("failed to extract gluster volume name"));
-            goto cleanup;
-        }
-
-        if (pooltype == VIR_STORAGE_POOL_NETFS)
-            src->format = VIR_STORAGE_POOL_NETFS_GLUSTERFS;
-
-        if (VIR_ALLOC_N(src->hosts, 1) < 0)
-            goto cleanup;
-        src->nhost = 1;
-
-        if (VIR_STRDUP(src->hosts[0].name, host) < 0)
-            goto cleanup;
-    }
-
-    ret = nnodes;
+    ret = virStorageUtilGlusterExtractPoolSources(host, outbuf, list, pooltype);
 
  cleanup:
-    VIR_FREE(nodes);
-    xmlXPathFreeContext(ctxt);
-    xmlFreeDoc(doc);
     VIR_FREE(outbuf);
     virCommandFree(cmd);
     VIR_FREE(glusterpath);

src/storage/storage_util.h

@@ -93,6 +93,10 @@ int virStorageBackendDeleteLocal(virConnectPtr conn,
 int virStorageBackendRefreshLocal(virConnectPtr conn,
                                   virStoragePoolObjPtr pool);
 
+int virStorageUtilGlusterExtractPoolSources(const char *host,
+                                            const char *xml,
+                                            virStoragePoolSourceListPtr list,
+                                            virStoragePoolType pooltype);
 int virStorageBackendFindGlusterPoolSources(const char *host,
                                             virStoragePoolType pooltype,
                                             virStoragePoolSourceListPtr list,