tier/tier.t: Fixing tier.t crash in regression runs

1) If the database file exists
   a. Dont try re-creating the db schema
   b. Dont try re-configuring the db.

2) Dont assert in fini_db () when connection is NULL

>> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
>> Reviewed-on: http://review.gluster.org/10870
>> Tested-by: NetBSD Build System
>> Tested-by: Gluster Build System <jenkins@build.gluster.com>
>> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
>> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
>>Change-Id: Idd2833f55caaa6b3a77d935d877d6c4d2994da6a

Change-Id: Ia2e044fce4e41bccc8fdada1cb21f240fdbd55df
BUG: 1225077
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Reviewed-on: http://review.gluster.org/10992
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Vijay Bellur <vbellur@redhat.com>

2 files changed, 17 insertions, 8 deletions

diff --git a/libglusterfs/src/gfdb/gfdb_data_store.c b/libglusterfs/src/gfdb/gfdb_data_store.c
index ec92f7a4d20..5699b750068 100644
--- a/libglusterfs/src/gfdb/gfdb_data_store.c
+++ b/libglusterfs/src/gfdb/gfdb_data_store.c
@@ -55,6 +55,16 @@ do {\
         GF_ASSERT (_conn_node->gfdb_connection.gf_db_connection);\
 } while (0)
 
+/* Checks the sanity of the connection node and goto */
+#define CHECK_CONN_NODE_GOTO(_conn_node, label)\
+do {\
+        if (!_conn_node) {\
+                goto label;\
+        };\
+        if (!_conn_node->gfdb_connection.gf_db_connection) {\
+                goto label;\
+        };\
+} while (0)
 
 /*Check if the conn node is first in the list*/
 #define IS_FIRST_NODE(db_conn_list, _conn_node)\
@@ -297,7 +307,7 @@ fini_db (gfdb_conn_node_t *_conn_node)
         int ret = -1;
         gfdb_db_operations_t *db_operations_t   = NULL;
 
-        CHECK_CONN_NODE(_conn_node);
+        CHECK_CONN_NODE_GOTO (_conn_node, empty);
 
         db_operations_t = &_conn_node->gfdb_connection.gfdb_db_operations;
 
@@ -316,7 +326,7 @@ fini_db (gfdb_conn_node_t *_conn_node)
                 gf_log (GFDB_DATA_STORE, GF_LOG_ERROR,
                                 "Failed deleting connection node from list");
         }
-
+empty:
         ret = 0;
 out:
         return ret;
diff --git a/libglusterfs/src/gfdb/gfdb_sqlite3.c b/libglusterfs/src/gfdb/gfdb_sqlite3.c
index b9de3d3a3a6..02d60857498 100644
--- a/libglusterfs/src/gfdb/gfdb_sqlite3.c
+++ b/libglusterfs/src/gfdb/gfdb_sqlite3.c
@@ -436,9 +436,9 @@ gf_sqlite3_init (dict_t *args, void **db_conn) {
         }
 
         /* If the file exist we skip the config part
-         * and create the schema if NOT Present*/
+         * and creation of the schema */
         if (is_dbfile_exist)
-                goto create_table;
+                goto db_exists;
 
 
         /*Apply sqlite3 params to database*/
@@ -450,17 +450,16 @@ gf_sqlite3_init (dict_t *args, void **db_conn) {
                 goto out;
         }
 
-/*Create the schema if NOT present*/
-create_table:
-
+        /*Create the schema if NOT present*/
         ret = create_filetable (sql_conn->sqlite3_db_conn);
         if (ret) {
                 gf_log (GFDB_STR_SQLITE3, GF_LOG_ERROR,
                         "Failed Creating %s Table", GF_FILE_TABLE);
                goto out;
         }
-        ret = 0;
 
+db_exists:
+        ret = 0;
 out:
         if (ret) {
                 gf_sqlite3_fini ((void **)&sql_conn);