mgmt/Glusterd: new command volume reset <volname>, volume set enhancements

- Write the reconfigured options in 'info' file to make it persistant
- Implementation of volume set  <volname> history
- Implementation of volume reset <volname>

Signed-off-by: Kaushik BV <kaushikbv@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1159 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1159

5 files changed, 376 insertions, 2 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index 39c1d5924..031e07481 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -47,6 +47,7 @@
 #include "cli1.h"
 #include "rpc-clnt.h"
 #include "glusterd1-xdr.h"
+#include "glusterd-volgen.h"
 
 #include <sys/resource.h>
 #include <inttypes.h>
@@ -1322,6 +1323,50 @@ out:
         return ret;
 }
 
+
+
+
+int
+glusterd_handle_reset_volume (rpcsvc_request_t *req)
+{
+        int32_t                           ret = -1;
+        gf1_cli_reset_vol_req           cli_req = {0,};
+        dict_t                          *dict = NULL;
+
+        GF_ASSERT (req);
+
+        if (!gf_xdr_to_cli_set_vol_req (req->msg[0], &cli_req)) {
+                //failed to decode msg;
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        if (cli_req.dict.dict_len) {
+                /* Unserialize the dictionary */
+                dict  = dict_new ();
+
+                ret = dict_unserialize (cli_req.dict.dict_val,
+                                        cli_req.dict.dict_len,
+                                        &dict);
+                if (ret < 0) {
+                        gf_log ("glusterd", GF_LOG_ERROR,
+                                "failed to "
+                                                "unserialize req-buffer to dictionary");
+                        goto out;
+                } else {
+                        dict->extra_stdfree = cli_req.dict.dict_val;
+                }
+        }
+
+        ret = glusterd_reset_volume (req, dict);
+
+out:
+                if (cli_req.volname)
+                free (cli_req.volname);//malloced by xdr
+
+        return ret;
+}
+
 int
 glusterd_handle_set_volume (rpcsvc_request_t *req)
 {
@@ -2756,13 +2801,106 @@ glusterd_replace_brick (rpcsvc_request_t *req, dict_t *dict)
         return ret;
 }
 
+static void
+_print (dict_t *unused, char *key, data_t *value, void *newdict)
+{
+        gf_log ("", GF_LOG_DEBUG, "key=%s, value=%s", key, value->data);
+}
+
+int
+glusterd_set_volume_history (rpcsvc_request_t *req,dict_t *dict)
+{
+//         dict_t                 *reply_dict = NULL;
+        glusterd_volinfo_t     *volinfo    = NULL;
+        gf1_cli_set_vol_rsp     rsp        = {0, };
+        int                     ret        = -1;
+        char                   *volname    = NULL;
+        
+        gf_log ("", GF_LOG_DEBUG, "'volume set history' command");
+        
+        ret = dict_get_str (dict, "volname", &volname);
+
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to get volume name");
+                goto out;
+        }
+
+        ret = glusterd_volinfo_find (volname, &volinfo);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to allocate memory");
+                goto out;
+        }
+        
+
+        
+        dict_foreach (volinfo->dict, _print, volinfo->dict);
+        
+        ret = dict_allocate_and_serialize (volinfo->dict, &rsp.dict.dict_val,
+                                           (size_t *)&rsp.dict.dict_len);
+ 
+
+        if (ret) {
+                gf_log ("", GF_LOG_DEBUG, "FAILED: allocatea n serialize dict");
+                goto out;
+        }
+
+        if (!ret)
+                rsp.op_ret = 1;
+        else
+                rsp.op_ret = ret;
+        if (!rsp.volname) 
+                rsp.volname = "";
+
+        ret = glusterd_submit_reply (req, &rsp, NULL, 0, NULL,
+                                     gf_xdr_serialize_cli_set_vol_rsp);
+
+out:
+                gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+        return ret;
+}
+
+int32_t
+glusterd_reset_volume (rpcsvc_request_t *req, dict_t *dict)
+{
+        int ret = -1;
+
+        
+        glusterd_op_set_op (GD_OP_RESET_VOLUME);
+
+        glusterd_op_set_ctx (GD_OP_RESET_VOLUME, dict);
+
+        glusterd_op_set_ctx_free (GD_OP_RESET_VOLUME, _gf_true);
+
+        glusterd_op_set_cli_op (GD_MGMT_CLI_RESET_VOLUME);
+
+        glusterd_op_set_req (req);
+
+        ret = glusterd_op_txn_begin ();
+        
+        return ret;
+}
+
+
+
 int32_t
 glusterd_set_volume (rpcsvc_request_t *req, dict_t *dict)
 {
-        int32_t      ret       = -1;
+        int32_t      ret        = -1;
+        int32_t      dict_count = 0;
 
         GF_ASSERT (req);
         GF_ASSERT (dict);
+        
+        ret = dict_get_int32 (dict, "count", &dict_count);
+        if (ret)
+               goto out;
+        
+        if (dict_count == 1) {
+                if (dict_get (dict, "history")) {
+                        ret = glusterd_set_volume_history(req, dict);
+                        goto out;
+                }
+        }
 
         glusterd_op_set_op (GD_OP_SET_VOLUME);
 
@@ -2776,6 +2914,8 @@ glusterd_set_volume (rpcsvc_request_t *req, dict_t *dict)
 
         ret = glusterd_op_txn_begin ();
 
+out:
+
         return ret;
 }
 
@@ -2813,6 +2953,7 @@ glusterd_log_filename (rpcsvc_request_t *req, dict_t *dict)
 
         ret = glusterd_op_txn_begin ();
 
+
         return ret;
 }
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 317eab700..513be5b4d 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -144,6 +144,7 @@ glusterd_op_get_len (glusterd_op_t op)
                         break;
 
                 case GD_OP_SET_VOLUME:
+                case GD_OP_RESET_VOLUME:
                 case GD_OP_REPLACE_BRICK:
                 case GD_OP_ADD_BRICK:
                         {
@@ -242,6 +243,7 @@ glusterd_op_build_payload (glusterd_op_t op, gd1_mgmt_stage_op_req **req)
                 case GD_OP_ADD_BRICK:
                 case GD_OP_REPLACE_BRICK:
                 case GD_OP_SET_VOLUME:
+                case GD_OP_RESET_VOLUME:
                 case GD_OP_REMOVE_BRICK:
                 case GD_OP_LOG_FILENAME:
                 case GD_OP_LOG_ROTATE:
@@ -1118,6 +1120,54 @@ out:
         return ret;
 }
 
+static int
+glusterd_op_stage_reset_volume (gd1_mgmt_stage_op_req *req)
+{
+        int                                      ret           = 0;
+        dict_t                                  *dict          = NULL;
+        char                                    *volname       = NULL;
+        gf_boolean_t                             exists        = _gf_false;
+
+        GF_ASSERT (req);
+
+        dict = dict_new ();
+        if (!dict)
+                goto out;
+
+        ret = dict_unserialize (req->buf.buf_val, req->buf.buf_len, &dict);
+
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to unserialize dict");
+                goto out;
+        }
+
+        ret = dict_get_str (dict, "volname", &volname);
+
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to get volume name");
+                goto out;
+        }
+
+        exists = glusterd_check_volume_exists (volname);
+
+        if (!exists) {
+                gf_log ("", GF_LOG_ERROR, "Volume with name: %s "
+                                "does not exist",
+                                volname);
+                ret = -1;
+                goto out;
+        }
+
+
+out:
+                if (dict)
+                dict_unref (dict);
+        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+
 
 gf_boolean_t
 glusterd_check_option_exists(char *optstring)
@@ -2746,6 +2796,102 @@ out:
         return ret;
 }
 
+void
+_delete_reconfig_opt (dict_t *this, char *key, data_t *value, void *data)
+{
+        
+        gf_boolean_t            exists = _gf_false;
+        
+        exists = glusterd_check_option_exists(key);
+        
+        if (exists) {
+                gf_log ("", GF_LOG_DEBUG, "deleting dict with key=%s,value=%s", 
+                        key, value->data);
+                dict_del (this, key);
+        }
+
+}
+
+int
+glusterd_options_reset (glusterd_volinfo_t *volinfo)
+{
+        int                      ret = 0;
+        
+        gf_log ("", GF_LOG_DEBUG, "Received volume set reset command");
+        
+        GF_ASSERT (volinfo->dict);
+        
+        dict_foreach (volinfo->dict, _delete_reconfig_opt, volinfo->dict); 
+        
+        ret = glusterd_create_volfiles (volinfo);
+
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to create volfile for"
+                                " 'volume set'");
+                ret = -1;
+                goto out;
+        }
+
+        ret = glusterd_store_update_volume (volinfo);
+        if (ret)
+                goto out;
+
+        ret = glusterd_volume_compute_cksum (volinfo);
+        if (ret)
+                goto out;
+
+        if (GLUSTERD_STATUS_STARTED == volinfo->status)
+                ret = glusterd_check_generate_start_nfs (volinfo);
+        if (ret)
+                goto out;
+
+        ret = 0;
+
+out:
+                gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+        return ret;
+}
+
+
+static int
+glusterd_op_reset_volume (gd1_mgmt_stage_op_req *req)
+{
+        glusterd_volinfo_t     *volinfo    = NULL;
+        int                     ret        = -1;
+        char                   *volname    = NULL;
+        dict_t                 *dict       = NULL;
+        
+        dict = dict_new ();
+        if (!dict)
+                goto out;
+
+
+        ret = dict_unserialize (req->buf.buf_val, req->buf.buf_len, &dict);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to unserialize dict");
+                goto out;
+        }
+
+        ret = dict_get_str (dict, "volname", &volname);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to get volume name " );
+                goto out;
+        }
+
+        ret = glusterd_volinfo_find (volname, &volinfo);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to allocate memory");
+                goto out;
+        }
+        
+        ret = glusterd_options_reset (volinfo);
+
+out:
+        gf_log ("", GF_LOG_DEBUG, "'volume reset' returning %d", ret);
+        return ret;
+         
+}
+
 static int
 glusterd_op_set_volume (gd1_mgmt_stage_op_req *req)
 {
@@ -4033,6 +4179,22 @@ glusterd_op_send_cli_response (int32_t op, int32_t op_ret,
                                 sfunc = gf_xdr_serialize_cli_set_vol_rsp;
                                 break;
                         }
+                        
+                case GD_MGMT_CLI_RESET_VOLUME:
+                        {
+                                gf_log ("", GF_LOG_DEBUG, "Return value to CLI");
+                                gf1_cli_reset_vol_rsp rsp = {0,};
+                                rsp.op_ret = op_ret;
+                                rsp.op_errno = 1;
+                                rsp.volname = "";
+                                if (op_errstr)
+                                        rsp.op_errstr = op_errstr;
+                                else
+                                        rsp.op_errstr = "Error while resetting options";
+                                cli_rsp = &rsp;
+                                sfunc = gf_xdr_serialize_cli_reset_vol_rsp;
+                                break;
+                        }
 
                 case GD_MGMT_CLI_LOG_FILENAME:
                         {
@@ -4315,6 +4477,9 @@ glusterd_op_stage_validate (gd1_mgmt_stage_op_req *req, char **op_errstr)
                 case GD_OP_SET_VOLUME:
                         ret = glusterd_op_stage_set_volume (req);
                         break;
+                        
+                case GD_OP_RESET_VOLUME:
+                        ret = glusterd_op_stage_reset_volume (req);
 
                 case GD_OP_REMOVE_BRICK:
                         ret = glusterd_op_stage_remove_brick (req);
@@ -4380,6 +4545,10 @@ glusterd_op_commit_perform (gd1_mgmt_stage_op_req *req, char **op_errstr,
                         ret = glusterd_op_set_volume (req);
                         break;
 
+                case GD_OP_RESET_VOLUME:
+                        ret = glusterd_op_reset_volume (req);
+                        break;
+
                 case GD_OP_REMOVE_BRICK:
                         ret = glusterd_op_remove_brick (req);
                         break;
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 27bed10d2..7c18b69a9 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -20,6 +20,8 @@
 #define _CONFIG_H
 #include "config.h"
 #endif
+
+#include "glusterd-op-sm.h"
 #include <inttypes.h>
 
 
@@ -970,6 +972,7 @@ glusterd_store_retrieve_volume (char    *volname)
         char                    volpath[PATH_MAX] = {0,};
         glusterd_conf_t         *priv = NULL;
         char                    path[PATH_MAX] = {0,};
+        gf_boolean_t            exists = _gf_false;
 
         ret = glusterd_volinfo_new (&volinfo);
 
@@ -1025,7 +1028,21 @@ glusterd_store_retrieve_volume (char    *volname)
                                 gf_log ("", GF_LOG_WARNING,
                                         "failed to parse uuid");
                 } else {
-                        gf_log ("", GF_LOG_ERROR, "Unknown key: %s",
+                        exists = glusterd_check_option_exists (key);
+                        if (exists) {
+                                ret = dict_set_str(volinfo->dict, key, 
+                                                     gf_strdup (value));
+                                if (ret) {
+                                        gf_log ("",GF_LOG_ERROR, "Error in "
+                                                        "dict_set_str");
+                                        goto out;
+                                }
+                                gf_log ("", GF_LOG_DEBUG, "Parsed as Volume-"
+                                                "set:key=%s,value:%s", 
+                                                                key, value);
+                        }
+                        else
+                                gf_log ("", GF_LOG_DEBUG, "Unknown key: %s",
                                         key);
                 }
 
@@ -1104,6 +1121,39 @@ out:
         return ret;
 }
 
+void _setopts(dict_t *this, char *key, data_t *value, void *data)
+{
+        int                      ret = 0;
+        glusterd_store_handle_t *shandle = NULL;
+        gf_boolean_t             exists = _gf_false;
+        
+
+        shandle = (glusterd_store_handle_t *) data;
+
+        GF_ASSERT (shandle);
+        if (!key)
+                return;
+        if (!value || !value->data)
+                return;
+
+        exists = glusterd_check_option_exists (key);
+        if (exists)
+                gf_log ("", GF_LOG_DEBUG, "Storing in volinfo:key= %s, val=%s",
+                        key, value->data);
+        else {
+                gf_log ("", GF_LOG_DEBUG, "Discarding:key= %s, val=%s",
+                        key, value->data);
+                return;
+        }
+        
+        ret = glusterd_store_save_value (shandle, key, value->data);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to write into store"
+                                " handle for path: %s", shandle->path);
+                return;
+        }
+}
+
 int32_t
 glusterd_store_update_volume (glusterd_volinfo_t *volinfo)
 {
@@ -1171,6 +1221,8 @@ glusterd_store_update_volume (glusterd_volinfo_t *volinfo)
                         goto out;
                 brick_count++;
         }
+        
+        dict_foreach (volinfo->dict, _setopts, volinfo->shandle);
 
         ret = 0;
 
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index b11ce09fb..e1cbc3583 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -64,6 +64,7 @@ typedef enum glusterd_op_ {
         GD_OP_REMOVE_BRICK,
         GD_OP_REPLACE_BRICK,
         GD_OP_SET_VOLUME,
+        GD_OP_RESET_VOLUME,
         GD_OP_SYNC_VOLUME,
         GD_OP_LOG_FILENAME,
         GD_OP_LOG_LOCATE,
@@ -416,10 +417,16 @@ glusterd_remove_brick (rpcsvc_request_t *req, dict_t *dict);
 int32_t
 glusterd_set_volume (rpcsvc_request_t *req, dict_t *dict);
 
+int32_t
+glusterd_reset_volume (rpcsvc_request_t *req, dict_t *dict);
+
 int
 glusterd_handle_set_volume (rpcsvc_request_t *req);
 
 int
+glusterd_handle_reset_volume (rpcsvc_request_t *req);
+
+int
 glusterd_xfer_cli_deprobe_resp (rpcsvc_request_t *req, int32_t op_ret,
                                 int32_t op_errno, char *hostname);
 
diff --git a/xlators/mgmt/glusterd/src/glusterd3_1-mops.c b/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
index a92ccf4c5..c21b43bcf 100644
--- a/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
+++ b/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
@@ -1425,6 +1425,10 @@ glusterd_handle_rpc_msg (rpcsvc_request_t *req)
                         ret = glusterd_handle_sync_volume (req);
                         break;
 
+                case GD_MGMT_CLI_RESET_VOLUME:
+                        ret = glusterd_handle_reset_volume (req);
+                        break;
+
                 default:
 			gf_log("", GF_LOG_ERROR, "Recieved Invalid procnum:%d",
 			       req->procnum);
@@ -1480,6 +1484,7 @@ rpcsvc_actor_t glusterd1_mgmt_actors[] = {
         [GD_MGMT_CLI_LOG_ROTATE] = { "LOG FILENAME", GD_MGMT_CLI_LOG_ROTATE, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_SET_VOLUME] = { "SET_VOLUME", GD_MGMT_CLI_SET_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_SYNC_VOLUME] = { "SYNC_VOLUME", GD_MGMT_CLI_SYNC_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
+        [GD_MGMT_CLI_RESET_VOLUME] = { "RESET_VOLUME", GD_MGMT_CLI_RESET_VOLUME, glusterd_handle_rpc_msg, NULL, NULL}
 };
 
 /*rpcsvc_actor_t glusterd1_mgmt_actors[] = {