libglusterfs/dict: make 'dict_t' a opaque object

* ie, don't dereference dict_t pointer, instead use APIs everywhere
* other than dict_t only 'data_t' should be the valid export from dict.h

* added 'dict_foreach_fnmatch()' API
* changed dict_lookup() to use data_t, instead of data_pair_t

Change-Id: I400bb0dd55519a7c5d2a107e67c8e7a7207228dc
Signed-off-by: Amar Tumballi <amarts@redhat.com>
BUG: 850917
Reviewed-on: http://review.gluster.org/3829
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

8 files changed, 70 insertions, 52 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-geo-rep.c b/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
index 808b1276b25..2a7cfca914b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
+++ b/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
@@ -172,7 +172,7 @@ glusterd_urltransform_add (runner_t *runner, const char *url)
         runner_add_arg (runner, url);
 }
 
-static void
+static int
 _glusterd_urltransform_add_iter (dict_t *dict, char *key, data_t *value, void *data)
 {
         runner_t *runner = (runner_t *)data;
@@ -182,6 +182,8 @@ _glusterd_urltransform_add_iter (dict_t *dict, char *key, data_t *value, void *d
         GF_ASSERT (slave);
         slave++;
         runner_add_arg (runner, slave);
+
+        return 0;
 }
 
 static void
@@ -296,7 +298,7 @@ struct dictidxmark {
         char *ikey;
 };
 
-static void
+static int
 _dict_mark_atindex (dict_t *dict, char *key, data_t *value, void *data)
 {
         struct dictidxmark *dim = data;
@@ -305,6 +307,7 @@ _dict_mark_atindex (dict_t *dict, char *key, data_t *value, void *data)
                 dim->ikey = key;
 
         dim->ithis++;
+        return 0;
 }
 
 static char *
@@ -734,7 +737,7 @@ static int
 glusterd_get_gsync_status_mst_slv (glusterd_volinfo_t *volinfo,
                                    char *slave, dict_t *rsp_dict);
 
-static void
+static int
 _get_status_mst_slv (dict_t *this, char *key, data_t *value, void *data)
 {
         glusterd_gsync_status_temp_t  *param = NULL;
@@ -750,15 +753,15 @@ _get_status_mst_slv (dict_t *this, char *key, data_t *value, void *data)
         if (slave)
                 slave ++;
         else
-                return;
+                return 0;
 
         ret = glusterd_get_gsync_status_mst_slv(param->volinfo,
                                                 slave, param->rsp_dict);
-
+        return 0;
 }
 
 
-static void
+static int
 _get_max_gsync_slave_num (dict_t *this, char *key, data_t *value, void *data)
 {
         int  tmp_slvnum = 0;
@@ -767,6 +770,8 @@ _get_max_gsync_slave_num (dict_t *this, char *key, data_t *value, void *data)
         sscanf (key, "slave%d", &tmp_slvnum);
         if (tmp_slvnum > *slvnum)
                 *slvnum = tmp_slvnum;
+
+        return 0;
 }
 
 static int
@@ -1987,7 +1992,7 @@ glusterd_do_gsync_log_rotation_mst_slv (glusterd_volinfo_t *volinfo, char *slave
         return ret;
 }
 
-static void
+static int
 _iterate_log_rotate_mst_slv (dict_t *this, char *key, data_t *value, void *data)
 {
         glusterd_gsync_status_temp_t  *param = NULL;
@@ -2004,10 +2009,11 @@ _iterate_log_rotate_mst_slv (dict_t *this, char *key, data_t *value, void *data)
         else {
                 gf_log ("", GF_LOG_ERROR, "geo-replication log-rotate: slave (%s) "
                         "not conforming to format", slave);
-                return;
+                return -1;
         }
 
         (void) glusterd_do_gsync_log_rotation_mst_slv (param->volinfo, slave, NULL);
+        return 0;
 }
 
 static int
diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index 8804176dcc6..180b28294fd 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -278,7 +278,6 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo,
         glusterd_brickinfo_t    *brickinfo = NULL;
         char                    *buf = NULL;
         int                     i = 1;
-        data_pair_t             *pairs = NULL;
         char                    reconfig_key[256] = {0, };
         dict_t                  *dict = NULL;
         int                     opt_count = 0;
@@ -365,14 +364,15 @@ glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo,
                 goto out;
         }
 
-        for (pairs = dict->members_list; pairs != NULL; pairs = pairs->next) {
-                snprintf (reconfig_key, 256, "volume%d.option.%s", count,
-                          pairs->key);
-                ret = dict_set_str  (volumes, reconfig_key, pairs->value->data);
+        int _build_option_key (dict_t *d, char *k, data_t *v, void *tmp)
+        {
+                snprintf (reconfig_key, 256, "volume%d.option.%s", count, k);
+                ret = dict_set_str  (volumes, reconfig_key, v->data);
                 if (0 == ret)
-                    opt_count++;
-
+                        opt_count++;
+                return 0;
         }
+        dict_foreach (dict, _build_option_key, NULL);
 
         snprintf (key, 256, "volume%d.opt_count", count);
         ret = dict_set_int32 (volumes, key, opt_count);
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index aea27500d6a..4385f876498 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -851,7 +851,7 @@ out:
 }
 
 
-static void
+static int
 _delete_reconfig_opt (dict_t *this, char *key, data_t *value, void *data)
 {
         int32_t        *is_force = 0;
@@ -873,7 +873,7 @@ _delete_reconfig_opt (dict_t *this, char *key, data_t *value, void *data)
                 key, value->data);
         dict_del (this, key);
 out:
-        return;
+        return 0;
 }
 
 static int
@@ -3045,7 +3045,7 @@ glusterd_op_commit_perform (glusterd_op_t op, dict_t *dict, char **op_errstr,
         return ret;
 }
 
-void
+int
 _profile_volume_add_brick_rsp (dict_t *this, char *key, data_t *value,
                              void *data)
 {
@@ -3058,6 +3058,7 @@ _profile_volume_add_brick_rsp (dict_t *this, char *key, data_t *value,
         GF_ASSERT (new_value);
         snprintf (new_key, sizeof (new_key), "%d-%s", rsp_ctx->count, key);
         dict_set (rsp_ctx->dict, new_key, new_value);
+        return 0;
 }
 
 int
@@ -3113,7 +3114,7 @@ glusterd_profile_volume_brick_rsp (void *pending_entry,
 
 //input-key: <replica-id>:<child-id>-*
 //output-key: <brick-id>-*
-void
+int
 _heal_volume_add_shd_rsp (dict_t *this, char *key, data_t *value, void *data)
 {
         char                            new_key[256] = {0,};
@@ -3170,7 +3171,7 @@ _heal_volume_add_shd_rsp (dict_t *this, char *key, data_t *value, void *data)
         dict_set (rsp_ctx->dict, new_key, new_value);
 
 out:
-        return;
+        return 0;
 }
 
 int
@@ -3206,7 +3207,7 @@ out:
         return ret;
 }
 
-void
+int
 _status_volume_add_brick_rsp (dict_t *this, char *key, data_t *value,
                               void *data)
 {
@@ -3219,7 +3220,7 @@ _status_volume_add_brick_rsp (dict_t *this, char *key, data_t *value,
         snprintf (new_key, sizeof (new_key), "brick%d.%s", rsp_ctx->count, key);
         dict_set (rsp_ctx->dict, new_key, new_value);
 
-        return;
+        return 0;
 }
 
 int
diff --git a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
index a3522a98c51..491a3255ec5 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
@@ -942,7 +942,7 @@ out:
 
 }
 
-void
+int
 _profile_volume_add_friend_rsp (dict_t *this, char *key, data_t *value,
                                void *data)
 {
@@ -953,7 +953,7 @@ _profile_volume_add_friend_rsp (dict_t *this, char *key, data_t *value,
         char    brick_key[256];
 
         if (strcmp (key, "count") == 0)
-                return;
+                return 0;
         sscanf (key, "%d%s", &brick_count, brick_key);
         rsp_ctx = data;
         new_value = data_copy (value);
@@ -961,6 +961,7 @@ _profile_volume_add_friend_rsp (dict_t *this, char *key, data_t *value,
         snprintf (new_key, sizeof (new_key), "%d%s",
                   rsp_ctx->count + brick_count, brick_key);
         dict_set (rsp_ctx->dict, new_key, new_value);
+        return 0;
 }
 
 int
@@ -995,7 +996,7 @@ out:
         return ret;
 }
 
-void
+int
 glusterd_volume_status_add_peer_rsp (dict_t *this, char *key, data_t *value,
                                      void *data)
 {
@@ -1008,7 +1009,7 @@ glusterd_volume_status_add_peer_rsp (dict_t *this, char *key, data_t *value,
 
         if (!strcmp (key, "count") || !strcmp (key, "cmd") ||
             !strcmp (key, "brick-index-max") || !strcmp (key, "other-count"))
-                return;
+                return -1;
 
         rsp_ctx = data;
         new_value = data_copy (value);
@@ -1029,7 +1030,7 @@ glusterd_volume_status_add_peer_rsp (dict_t *this, char *key, data_t *value,
                 gf_log ("", GF_LOG_ERROR, "Unable to set key: %s in dict",
                         key);
 
-        return;
+        return 0;
 }
 
 int
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index eef42fb341b..d11454bc4ba 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -541,7 +541,7 @@ out:
         return ret;
 }
 
-static void
+static int
 _storeslaves (dict_t *this, char *key, data_t *value, void *data)
 {
         int32_t                      ret = 0;
@@ -556,12 +556,12 @@ _storeslaves (dict_t *this, char *key, data_t *value, void *data)
         GF_ASSERT (value && value->data);
 
         if ((!shandle) || (shandle->fd <= 0) || (!shandle->path))
-                return;
+                return -1;
 
         if (!key)
-                return;
+                return -1;
         if (!value || !value->data)
-                return;
+                return -1;
 
         gf_log ("", GF_LOG_DEBUG, "Storing in volinfo:key= %s, val=%s",
                 key, value->data);
@@ -570,12 +570,13 @@ _storeslaves (dict_t *this, char *key, data_t *value, void *data)
         if (ret) {
                 gf_log ("", GF_LOG_ERROR, "Unable to write into store"
                                 " handle for path: %s", shandle->path);
-                return;
+                return -1;
         }
+        return 0;
 }
 
 
-void _storeopts (dict_t *this, char *key, data_t *value, void *data)
+int _storeopts (dict_t *this, char *key, data_t *value, void *data)
 {
         int32_t                      ret = 0;
         int32_t                      exists = 0;
@@ -590,12 +591,12 @@ void _storeopts (dict_t *this, char *key, data_t *value, void *data)
         GF_ASSERT (value && value->data);
 
         if ((!shandle) || (shandle->fd <= 0) || (!shandle->path))
-                return;
+                return -1;
 
         if (!key)
-                return;
+                return -1;
         if (!value || !value->data)
-                return;
+                return -1;
 
         if (is_key_glusterd_hooks_friendly (key)) {
                 exists = 1;
@@ -611,15 +612,16 @@ void _storeopts (dict_t *this, char *key, data_t *value, void *data)
         } else {
                 gf_log ("", GF_LOG_DEBUG, "Discarding:key= %s, val=%s",
                         key, value->data);
-                return;
+                return 0;
         }
 
         ret = glusterd_store_save_value (shandle->fd, key, (char*)value->data);
         if (ret) {
                 gf_log ("", GF_LOG_ERROR, "Unable to write into store"
                                 " handle for path: %s", shandle->path);
-                return;
+                return -1;
         }
+        return 0;
 }
 
 int32_t
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 51478fb1246..3a48a41d76c 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -1615,7 +1615,7 @@ out:
         return ret;
 }
 
-void
+int
 _add_volinfo_dict_to_prdict (dict_t *this, char *key, data_t *value, void *data)
 {
         glusterd_voldict_ctx_t   *ctx = NULL;
@@ -1637,7 +1637,7 @@ _add_volinfo_dict_to_prdict (dict_t *this, char *key, data_t *value, void *data)
                         ctx->val_name, ctx->count, value->data);
         ctx->opt_count++;
 
-        return;
+        return ret;
 }
 
 int32_t
@@ -3495,7 +3495,7 @@ glusterd_restart_bricks (glusterd_conf_t *conf)
         return ret;
 }
 
-void
+int
 _local_gsyncd_start (dict_t *this, char *key, data_t *value, void *data)
 {
         char                        *slave = NULL;
@@ -3509,11 +3509,13 @@ _local_gsyncd_start (dict_t *this, char *key, data_t *value, void *data)
         if (slave)
                 slave ++;
         else
-                return;
+                return 0;
         uuid_len = (slave - value->data - 1);
 
         strncpy (uuid_str, (char*)value->data, uuid_len);
         glusterd_start_gsync (volinfo, slave, uuid_str, NULL);
+
+        return 0;
 }
 
 int
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 28f480a3142..1375bd482ef 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -649,14 +649,14 @@ struct opthandler_data {
         void *param;
 };
 
-static void
+static int
 process_option (dict_t *dict, char *key, data_t *value, void *param)
 {
         struct opthandler_data *odt = param;
         struct volopt_map_entry vme = {0,};
 
         if (odt->rv)
-                return;
+                return 0;
         odt->found = _gf_true;
 
         vme.key = key;
@@ -675,6 +675,7 @@ process_option (dict_t *dict, char *key, data_t *value, void *param)
                 vme.value = value->data;
 
         odt->rv = odt->handler (odt->graph, &vme, odt->param);
+        return 0;
 }
 
 static int
@@ -3637,16 +3638,18 @@ out:
         return ret;
 }
 
-static void
+static int
 _check_globalopt (dict_t *this, char *key, data_t *value, void *ret_val)
 {
         int *ret = NULL;
 
         ret = ret_val;
         if (*ret)
-                return;
+                return 0;
         if (!glusterd_check_globaloption (key))
                 *ret = 1;
+
+        return 0;
 }
 
 int
@@ -3692,16 +3695,18 @@ out:
         return ret;
 }
 
-static void
+static int
 _check_localopt (dict_t *this, char *key, data_t *value, void *ret_val)
 {
         int *ret = NULL;
 
         ret = ret_val;
         if (*ret)
-                return;
+                return 0;
         if (!glusterd_check_localoption (key))
                 *ret = 1;
+
+        return 0;
 }
 
 int
diff --git a/xlators/mgmt/glusterd/src/glusterd.c b/xlators/mgmt/glusterd/src/glusterd.c
index 17a2063948f..f55b3ea51f2 100644
--- a/xlators/mgmt/glusterd/src/glusterd.c
+++ b/xlators/mgmt/glusterd/src/glusterd.c
@@ -655,7 +655,7 @@ check_prepare_mountbroker_root (char *mountbroker_root)
         return ret;
 }
 
-static void
+static int
 _install_mount_spec (dict_t *opts, char *key, data_t *value, void *data)
 {
         glusterd_conf_t *priv           = THIS->private;
@@ -671,7 +671,7 @@ _install_mount_spec (dict_t *opts, char *key, data_t *value, void *data)
         char            *volfile_server = NULL;
 
         if (*ret == -1)
-                return;
+                return -1;
 
         label = strtail (key, "mountbroker.");
 
@@ -688,7 +688,7 @@ _install_mount_spec (dict_t *opts, char *key, data_t *value, void *data)
         }
 
         if (!label)
-                return;
+                return -1;
 
         mspec = GF_CALLOC (1, sizeof (*mspec), gf_gld_mt_mount_spec);
         if (!mspec)
@@ -727,7 +727,7 @@ _install_mount_spec (dict_t *opts, char *key, data_t *value, void *data)
 
         list_add_tail (&mspec->speclist, &priv->mount_specs);
 
-        return;
+        return 0;
  err:
 
         gf_log ("", GF_LOG_ERROR,
@@ -735,6 +735,7 @@ _install_mount_spec (dict_t *opts, char *key, data_t *value, void *data)
                 georep ? GEOREP" " : "", label, pdesc);
 
         *ret = -1;
+        return -1;
 }
 
 /*