glusterd: log changes in volume create and delete codepath

Making log changes involving two commands as they both share sections
of code (like the part where the volume metadata is cleaned up in vol
delete in case of success; and in vol create in case of failure).

* Most of the changes are of the 's/THIS/this' kind.

* Changed some of the log messages to give as much information as
  available in case of failure.

* Changed log levels in some of the log messages.

Change-Id: I10242511fe9400a07ab04717464d748d9172dd85
BUG: 812356
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/4462
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 106 insertions, 83 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-volume-ops.c b/xlators/mgmt/glusterd/src/glusterd-volume-ops.c
index 9aa8df61dd1..246a7a6f1a8 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volume-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volume-ops.c
@@ -67,13 +67,14 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
         ret = -1;
         ret = xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req);
         if (ret < 0) {
-                //failed to decode msg;
                 req->rpc_err = GARBAGE_ARGS;
-                snprintf (err_str, sizeof (err_str), "Garbage args received");
+                snprintf (err_str, sizeof (err_str), "Failed to decode request "
+                          "received from cli");
+                gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
 
-        gf_log (this->name, GF_LOG_INFO, "Received create volume req");
+        gf_log (this->name, GF_LOG_DEBUG, "Received create volume req");
 
         if (cli_req.dict.dict_len) {
                 /* Unserialize the dictionary */
@@ -112,31 +113,31 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
 
         ret = dict_get_int32 (dict, "count", &brick_count);
         if (ret) {
-                snprintf (err_str, sizeof (err_str), "Unable to get volume "
-                          "brick count");
+                snprintf (err_str, sizeof (err_str), "Unable to get brick count"
+                          " for volume %s", volname);
                 gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
 
         ret = dict_get_int32 (dict, "type", &type);
         if (ret) {
-                snprintf (err_str, sizeof (err_str), "Unable to get volume "
-                          "type");
+                snprintf (err_str, sizeof (err_str), "Unable to get type of "
+                          "volume %s", volname);
                 gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
 
         ret = dict_get_str (dict, "transport", &trans_type);
         if (ret) {
-                snprintf (err_str, sizeof (err_str), "Unable to get volume "
-                          "transport-type");
+                snprintf (err_str, sizeof (err_str), "Unable to get "
+                          "transport-type of volume %s", volname);
                 gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
         ret = dict_get_str (dict, "bricks", &bricks);
         if (ret) {
-                snprintf (err_str, sizeof (err_str), "Unable to get volume "
-                          "bricks");
+                snprintf (err_str, sizeof (err_str), "Unable to get bricks for "
+                          "volume %s", volname);
                 gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
@@ -146,7 +147,7 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
         ret = dict_set_dynstr (dict, "volume-id", free_ptr);
         if (ret) {
                 snprintf (err_str, sizeof (err_str), "Unable to set volume "
-                          "id");
+                          "id of volume %s", volname);
                 gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 goto out;
         }
@@ -163,8 +164,8 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
                 brick_list = tmpptr;
                 ret = glusterd_brickinfo_new_from_brick (brick, &brickinfo);
                 if (ret) {
-                        snprintf (err_str, sizeof (err_str), "Unable to get "
-                                  "brick info from brick %s", brick);
+                        snprintf (err_str, sizeof (err_str), "Failed to create "
+                                  "brickinfo for brick %s", brick);
                         goto out;
                 }
 
@@ -182,14 +183,20 @@ glusterd_handle_create_volume (rpcsvc_request_t *req)
         uuid_generate (tmp_uuid);
         username = gf_strdup (uuid_utoa (tmp_uuid));
         ret = dict_set_dynstr (dict, "internal-username", username);
-        if (ret)
+        if (ret) {
+                gf_log (this->name, GF_LOG_ERROR, "Failed to set username for "
+                        "volume %s", volname);
                 goto out;
+        }
 
         uuid_generate (tmp_uuid);
         password = gf_strdup (uuid_utoa (tmp_uuid));
         ret = dict_set_dynstr (dict, "internal-password", password);
-        if (ret)
+        if (ret) {
+                gf_log (this->name, GF_LOG_ERROR, "Failed to set password for "
+                        "volume %s", volname);
                 goto out;
+        }
 
         ret = glusterd_op_begin (req, GD_OP_CREATE_VOLUME, dict, err_str,
                                  sizeof (err_str));
@@ -377,7 +384,9 @@ glusterd_handle_cli_delete_volume (rpcsvc_request_t *req)
 
         ret = xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req);
         if (ret < 0) {
-                //failed to decode msg;
+                snprintf (err_str, sizeof (err_str), "Failed to decode request "
+                          "received from cli");
+                gf_log (this->name, GF_LOG_ERROR, "%s", err_str);
                 req->rpc_err = GARBAGE_ARGS;
                 goto out;
         }
@@ -394,7 +403,7 @@ glusterd_handle_cli_delete_volume (rpcsvc_request_t *req)
                                 "failed to "
                                 "unserialize req-buffer to dictionary");
                         snprintf (err_str, sizeof (err_str), "Unable to decode "
-                                   "the command");
+                                  "the command");
                         goto out;
                 }
         }
@@ -408,7 +417,7 @@ glusterd_handle_cli_delete_volume (rpcsvc_request_t *req)
                 goto out;
         }
 
-        gf_log (this->name, GF_LOG_INFO, "Received delete vol req"
+        gf_log (this->name, GF_LOG_DEBUG, "Received delete vol req"
                 "for volume %s", volname);
 
         ret = glusterd_op_begin (req, GD_OP_DELETE_VOLUME, dict,
@@ -649,7 +658,6 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
         int32_t                                 i = 0;
         char                                    *brick = NULL;
         char                                    *tmpptr = NULL;
-        char                                    cmd_str[1024];
         xlator_t                                *this = NULL;
         glusterd_conf_t                         *priv = NULL;
         char                                    msg[2048] = {0};
@@ -659,62 +667,55 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
         char                                    *dev_type = NULL;
 #endif
         this = THIS;
-        if (!this) {
-                gf_log ("glusterd", GF_LOG_ERROR,
-                        "this is NULL");
-                goto out;
-        }
-
+        GF_ASSERT (this);
         priv = this->private;
-        if (!priv) {
-                gf_log ("glusterd", GF_LOG_ERROR,
-                        "priv is NULL");
-                goto out;
-        }
+        GF_ASSERT (priv);
 
         ret = dict_get_str (dict, "volname", &volname);
-
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get volume name");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
                 goto out;
         }
 
         exists = glusterd_check_volume_exists (volname);
-
         if (exists) {
                 snprintf (msg, sizeof (msg), "Volume %s already exists",
                           volname);
-                gf_log ("", GF_LOG_ERROR, "%s", msg);
-                *op_errstr = gf_strdup (msg);
                 ret = -1;
                 goto out;
         } else {
                 ret = 0;
         }
+
         ret = dict_get_int32 (dict, "count", &brick_count);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get count");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get brick count "
+                        "for volume %s", volname);
                 goto out;
         }
+
         ret = dict_get_str (dict, "volume-id", &volume_uuid_str);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get volume id");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get volume id of "
+                        "volume %s", volname);
                 goto out;
         }
+
         ret = uuid_parse (volume_uuid_str, volume_uuid);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to parse volume id");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to parse volume id of"
+                        " volume %s", volname);
                 goto out;
         }
 
-
 #ifdef HAVE_BD_XLATOR
         ret = dict_get_str (dict, "device", &dev_type);
 #endif
 
         ret = dict_get_str (dict, "bricks", &bricks);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get bricks");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get bricks for "
+                        "volume %s", volname);
                 goto out;
         }
 
@@ -722,7 +723,6 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
                 brick_list = gf_strdup (bricks);
                 if (!brick_list) {
                         ret = -1;
-                        gf_log ("", GF_LOG_ERROR, "Out of memory");
                         goto out;
                 } else {
                         free_ptr = brick_list;
@@ -738,9 +738,6 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
                         !glusterd_is_valid_volfpath (volname, brick)) {
                         snprintf (msg, sizeof (msg), "brick path %s is too "
                                   "long.", brick);
-                        gf_log ("", GF_LOG_ERROR, "%s", msg);
-                        *op_errstr = gf_strdup (msg);
-
                         ret = -1;
                         goto out;
                 }
@@ -748,12 +745,11 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
                 ret = glusterd_brickinfo_new_from_brick (brick, &brick_info);
                 if (ret)
                         goto out;
-                snprintf (cmd_str, 1024, "%s", brick_info->path);
+
                 ret = glusterd_resolve_brick (brick_info);
                 if (ret) {
-                        gf_log ("glusterd", GF_LOG_ERROR, "cannot resolve "
-                                "brick: %s:%s", brick_info->hostname,
-                                brick_info->path);
+                        gf_log (this->name, GF_LOG_ERROR, FMTSTR_RESOLVE_BRICK,
+                                brick_info->hostname, brick_info->path);
                         goto out;
                 }
 
@@ -763,7 +759,6 @@ glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr)
                         if (ret) {
                                 snprintf (msg, sizeof(msg), "invalid vg %s",
                                   brick_info->path);
-                                *op_errstr = gf_strdup (msg);
                                 goto out;
                         }
 
@@ -786,7 +781,12 @@ out:
         GF_FREE (free_ptr);
         if (brick_info)
                 glusterd_brickinfo_delete (brick_info);
-        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+
+        if (msg[0] != '\0') {
+                gf_log (this->name, GF_LOG_ERROR, "%s", msg);
+                *op_errstr = gf_strdup (msg);
+        }
+        gf_log (this->name, GF_LOG_DEBUG, "Returning %d", ret);
 
         return ret;
 }
@@ -1026,21 +1026,20 @@ glusterd_op_stage_delete_volume (dict_t *dict, char **op_errstr)
         gf_boolean_t                            exists = _gf_false;
         glusterd_volinfo_t                      *volinfo = NULL;
         char                                    msg[2048] = {0};
+        xlator_t                                *this = NULL;
 
-        ret = dict_get_str (dict, "volname", &volname);
+        this = THIS;
+        GF_ASSERT (this);
 
+        ret = dict_get_str (dict, "volname", &volname);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get volume name");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
                 goto out;
         }
 
         exists = glusterd_check_volume_exists (volname);
-
         if (!exists) {
-                snprintf (msg, sizeof (msg), "Volume %s does not exist",
-                          volname);
-                gf_log ("", GF_LOG_ERROR, "%s", msg);
-                *op_errstr = gf_strdup (msg);
+                snprintf (msg, sizeof (msg), FMTSTR_CHECK_VOL_EXISTS, volname);
                 ret = -1;
                 goto out;
         } else {
@@ -1048,9 +1047,10 @@ glusterd_op_stage_delete_volume (dict_t *dict, char **op_errstr)
         }
 
         ret  = glusterd_volinfo_find (volname, &volinfo);
-
-        if (ret)
+        if (ret) {
+                snprintf (msg, sizeof (msg), FMTSTR_CHECK_VOL_EXISTS, volname);
                 goto out;
+        }
 
         ret = glusterd_validate_volume_id (dict, volinfo);
         if (ret)
@@ -1060,8 +1060,6 @@ glusterd_op_stage_delete_volume (dict_t *dict, char **op_errstr)
                 snprintf (msg, sizeof (msg), "Volume %s has been started."
                           "Volume needs to be stopped before deletion.",
                           volname);
-                gf_log ("", GF_LOG_ERROR, "%s", msg);
-                *op_errstr = gf_strdup (msg);
                 ret = -1;
                 goto out;
         }
@@ -1069,7 +1067,11 @@ glusterd_op_stage_delete_volume (dict_t *dict, char **op_errstr)
         ret = 0;
 
 out:
-        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+        if (msg[0] != '\0') {
+                gf_log (this->name, GF_LOG_ERROR, "%s", msg);
+                *op_errstr = gf_strdup (msg);
+        }
+        gf_log (this->name, GF_LOG_DEBUG, "Returning %d", ret);
 
         return ret;
 }
@@ -1428,15 +1430,14 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
 
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "Unable to allocate memory");
+                        "Unable to allocate memory for volinfo");
                 goto out;
         }
 
         ret = dict_get_str (dict, "volname", &volname);
 
         if (ret) {
-                gf_log (this->name, GF_LOG_ERROR,
-                        "Unable to get volume name");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
                 goto out;
         }
 
@@ -1445,13 +1446,15 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
 
         ret = dict_get_int32 (dict, "type", &volinfo->type);
         if (ret) {
-                gf_log (this->name, GF_LOG_ERROR, "Unable to get type");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get type of volume"
+                        " %s", volname);
                 goto out;
         }
 
         ret = dict_get_int32 (dict, "count", &volinfo->brick_count);
         if (ret) {
-                gf_log (this->name, GF_LOG_ERROR, "Unable to get count");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get brick count of"
+                        " volume %s", volname);
                 goto out;
         }
 
@@ -1465,7 +1468,8 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
 
         ret = dict_get_str (dict, "bricks", &bricks);
         if (ret) {
-                gf_log (this->name, GF_LOG_ERROR, "Unable to get bricks");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get bricks for "
+                        "volume %s", volname);
                 goto out;
         }
 
@@ -1483,22 +1487,34 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
         if (GF_CLUSTER_TYPE_REPLICATE == volinfo->type) {
                 ret = dict_get_int32 (dict, "replica-count",
                                       &volinfo->replica_count);
-                if (ret)
+                if (ret) {
+                        gf_log (this->name, GF_LOG_ERROR, "Failed to get "
+                                 "replica count for volume %s", volname);
                         goto out;
+                }
         } else if (GF_CLUSTER_TYPE_STRIPE == volinfo->type) {
                 ret = dict_get_int32 (dict, "stripe-count",
                                       &volinfo->stripe_count);
-                if (ret)
+                if (ret) {
+                        gf_log (this->name, GF_LOG_ERROR, "Failed to get stripe"
+                                " count for volume %s", volname);
                         goto out;
+                }
         } else if (GF_CLUSTER_TYPE_STRIPE_REPLICATE == volinfo->type) {
                 ret = dict_get_int32 (dict, "stripe-count",
                                       &volinfo->stripe_count);
-                if (ret)
+                if (ret) {
+                        gf_log (this->name, GF_LOG_ERROR, "Failed to get stripe"
+                                " count for volume %s", volname);
                         goto out;
+                }
                 ret = dict_get_int32 (dict, "replica-count",
                                       &volinfo->replica_count);
-                if (ret)
+                if (ret) {
+                        gf_log (this->name, GF_LOG_ERROR, "Failed to get "
+                                "replica count for volume %s", volname);
                         goto out;
+                }
         }
 
         /* dist-leaf-count is the count of brick nodes for a given
@@ -1514,27 +1530,28 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
         ret = dict_get_str (dict, "transport", &trans_type);
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "Unable to get transport");
+                        "Unable to get transport type of volume %s", volname);
                 goto out;
         }
 
         ret = dict_get_str (dict, "volume-id", &str);
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "Unable to get volume-id");
+                        "Unable to get volume-id of volume %s", volname);
                 goto out;
         }
         ret = uuid_parse (str, volinfo->volume_id);
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "unable to parse uuid %s", str);
+                        "unable to parse uuid %s of volume %s", str, volname);
                 goto out;
         }
 
         ret = dict_get_str (dict, "internal-username", &username);
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "unable to get internal username");
+                        "unable to get internal username of volume %s",
+                        volname);
                 goto out;
         }
         glusterd_auth_set_username (volinfo, username);
@@ -1542,7 +1559,8 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
         ret = dict_get_str (dict, "internal-password", &password);
         if (ret) {
                 gf_log (this->name, GF_LOG_ERROR,
-                        "unable to get internal password");
+                        "unable to get internal password of volume %s",
+                        volname);
                 goto out;
         }
         glusterd_auth_set_password (volinfo, password);
@@ -1572,8 +1590,11 @@ glusterd_op_create_volume (dict_t *dict, char **op_errstr)
                         goto out;
 
                 ret = glusterd_resolve_brick (brickinfo);
-                if (ret)
+                if (ret) {
+                        gf_log (this->name, GF_LOG_ERROR, FMTSTR_RESOLVE_BRICK,
+                                brickinfo->hostname, brickinfo->path);
                         goto out;
+                }
                 list_add_tail (&brickinfo->brick_list, &volinfo->bricks);
                 brick = strtok_r (NULL, " \n", &saveptr);
                 i++;
@@ -1709,18 +1730,20 @@ glusterd_op_delete_volume (dict_t *dict)
 
         ret = dict_get_str (dict, "volname", &volname);
         if (ret) {
-                gf_log ("", GF_LOG_ERROR, "Unable to get volume name");
+                gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
                 goto out;
         }
 
         ret  = glusterd_volinfo_find (volname, &volinfo);
-
-        if (ret)
+        if (ret) {
+                gf_log (this->name, GF_LOG_ERROR, FMTSTR_CHECK_VOL_EXISTS,
+                        volname);
                 goto out;
+        }
 
         ret = glusterd_delete_volume (volinfo);
 out:
-        gf_log ("", GF_LOG_DEBUG, "returning %d", ret);
+        gf_log (this->name, GF_LOG_DEBUG, "returning %d", ret);
         return ret;
 }