glusterd-volgen.c: improve volgen_graph_set_options_generic()

Skip fetching "skip-CLIOT" unconditionally on every
invocation of volgen_graph_set_options_generic().
Instead, fetch only if the vme->key matches to it.
We calculate the length of vme->key (but we would have
done it anyway in dict_get() later on, so now we can use
dict_getn() instead and re-use that key length) and check
if the lengths match before doing a strcmp() between them.
Lastly, if they match, we actually do the fetch.

Change-Id: I9d9a7104f9e920bf81477128adb5fc87f5d30627
updates: bz#1193929
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>

1 files changed, 12 insertions, 11 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 4dbc78a8e02..b93c7b84c90 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -459,7 +459,7 @@ struct opthandler_data {
     void *param;
 };
 
-static int
+static void
 process_option(char *key, data_t *value, void *param)
 {
     struct opthandler_data *odt = param;
@@ -468,7 +468,7 @@ process_option(char *key, data_t *value, void *param)
     };
 
     if (odt->rv)
-        return 0;
+        return;
     odt->found = _gf_true;
 
     vme.key = key;
@@ -489,7 +489,7 @@ process_option(char *key, data_t *value, void *param)
         vme.value = value->data;
 
     odt->rv = odt->handler(odt->graph, &vme, odt->param);
-    return 0;
+    return;
 }
 
 static int
@@ -501,7 +501,7 @@ volgen_graph_set_options_generic(volgen_graph_t *graph, dict_t *dict,
         0,
     };
     data_t *data = NULL;
-    const int skip_cliot = dict_get_str_boolean(dict, "skip-CLIOT", _gf_false);
+    int keylen;
 
     odt.graph = graph;
     odt.handler = handler;
@@ -509,16 +509,17 @@ volgen_graph_set_options_generic(volgen_graph_t *graph, dict_t *dict,
     (void)data;
 
     for (vme = glusterd_volopt_map; vme->key; vme++) {
-        odt.vme = vme;
-        odt.found = _gf_false;
-        odt.data_t_fake = _gf_false;
-
-        data = dict_get(dict, vme->key);
-        if (skip_cliot == _gf_true &&
-            !strcmp(vme->key, "performance.client-io-threads")) {
+        keylen = strlen(vme->key);
+        if (keylen == SLEN("performance.client-io-threads") &&
+            !strcmp(vme->key, "performance.client-io-threads") &&
+            dict_get_str_boolean(dict, "skip-CLIOT", _gf_false) == _gf_true) {
             continue;
         }
 
+        odt.vme = vme;
+        odt.found = _gf_false;
+        odt.data_t_fake = _gf_false;
+        data = dict_getn(dict, vme->key, keylen);
         if (data)
             process_option(vme->key, data, &odt);
         if (odt.rv)