dict: add a dict_dump() function to dump the dictionary contents

helps for debugging some functionalities where we have to understand
what we send from one end point to another is properly received on
the other endpoint without any errors.

Change-Id: I9b802f12ae542e499161a1f3b9a5602f7b93b0ee
Signed-off-by: Amar Tumballi <amarts@redhat.com>
BUG: 782265
Reviewed-on: http://review.gluster.com/2959
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendrabhat@gluster.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/libglusterfs/src/dict.c b/libglusterfs/src/dict.c
index 67bac435f..ed89f236a 100644
--- a/libglusterfs/src/dict.c
+++ b/libglusterfs/src/dict.c
@@ -2850,3 +2850,40 @@ dict_serialize_value_with_delim (dict_t *this, char *buf, int32_t *serz_len,
 out:
         return ret;
 }
+
+void
+dict_dump (dict_t *this)
+{
+        int          ret     = 0;
+        int          dumplen = 0;
+        data_pair_t *trav    = NULL;
+        char         dump[64*1024]; /* This is debug only, hence
+                                       performance should not matter */
+
+        if (!this) {
+                gf_log_callingfn ("dict", GF_LOG_WARNING, "dict NULL");
+                goto out;
+        }
+
+        dump[0] = '\0'; /* the array is not initialized to '\0' */
+
+        /* There is a possibility of issues if data is binary, ignore it
+           for now as debugging is more important */
+        for (trav = this->members_list; trav; trav = trav->next) {
+                ret = snprintf (&dump[dumplen], ((64*1024) - dumplen - 1),
+                                "(%s:%s)", trav->key, trav->value->data);
+                if ((ret == -1) || !ret)
+                        break;
+
+                dumplen += ret;
+                /* snprintf doesn't append a trailing '\0', add it here */
+                dump[dumplen] = '\0';
+        }
+
+        if (dumplen)
+                gf_log_callingfn ("dict", GF_LOG_INFO,
+                                  "dict=%p (%s)", this, dump);
+
+out:
+        return;
+}
diff --git a/libglusterfs/src/dict.h b/libglusterfs/src/dict.h
index 8e81e539b..68579ad7b 100644
--- a/libglusterfs/src/dict.h
+++ b/libglusterfs/src/dict.h
@@ -237,4 +237,7 @@ GF_MUST_CHECK int dict_get_str (dict_t *this, char *key, char **str);
 GF_MUST_CHECK int dict_get_str_boolean (dict_t *this, char *key, int default_val);
 GF_MUST_CHECK int dict_serialize_value_with_delim (dict_t *this, char *buf, int32_t *serz_len,
                                                     char delimiter);
+
+void dict_dump (dict_t *dict);
+
 #endif