'gluster volume defrag' related bug fixes

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 1073 ('gluster defrag <VOLNAME>' fails in mainline)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1073

extras/glusterfs-defrag.in

@@ -46,24 +46,33 @@ rsync_filename()
 relocate_file()
 {
     path=$1;
+
+    # Make sure we don't 'defrag' valid file.
     stat_info=$(stat -c '%a' "$path");
     if [ $stat_info -lt 1000 ] ; then
         return;
     fi
 
-    flag=0;
+    # If there are some entries in added_bricks, then check
-    linknode=$(getfattr --only-values -n trusted.distribute.linkinfo $path 2>/dev/null);
+    # if the link file is present on those nodes, if not,
-    if [ -z $linknode ] ; then
+    # set flag=1, so full defrag happens
-        return;
-    fi
 
+    flag=0;
     for bricks in ${added_bricks}; do
+        linknode=$(getfattr --only-values -n trusted.distribute.linkinfo $path 2>/dev/null);
+        if [ -z $linknode ] ; then
+            return;
+        fi
         current_brick=${linknode:0:${#bricks}};
         if [ "${bricks}" == "${current_brick}" ]; then
             flag=1;
         fi
     done
 
+    if [ -z ${added_bricks} ] ; then
+        flag=1;
+    fi
+
     if [ $flag -ne 1 ]; then
         return;
     fi

rpc/xdr/src/cli1-xdr.c

@@ -268,8 +268,6 @@ xdr_gf1_cli_defrag_vol_rsp (XDR *xdrs, gf1_cli_defrag_vol_rsp *objp)
 		 return FALSE;
 	 if (!xdr_int (xdrs, &objp->op_errno))
 		 return FALSE;
-	 if (!xdr_string (xdrs, &objp->volname, ~0))
-		 return FALSE;
 	return TRUE;
 }
 

rpc/xdr/src/cli1-xdr.h

@@ -178,7 +178,6 @@ typedef struct gf1_cli_defrag_vol_req gf1_cli_defrag_vol_req;
 struct gf1_cli_defrag_vol_rsp {
 	int op_ret;
 	int op_errno;
-	char *volname;
 };
 typedef struct gf1_cli_defrag_vol_rsp gf1_cli_defrag_vol_rsp;
 

xlators/mgmt/glusterd/src/glusterd-handler.c

@@ -593,6 +593,55 @@ out:
         return ret;
 }
 
+
+
+int
+glusterd_handle_defrag_volume (rpcsvc_request_t *req)
+{
+        int32_t                ret           = -1;
+        gf1_cli_defrag_vol_req cli_req       = {0,};
+        glusterd_conf_t         *priv = NULL;
+        char                   cmd_str[4096] = {0,};
+
+        GF_ASSERT (req);
+
+        priv    = THIS->private;
+        if (!gf_xdr_to_cli_defrag_vol_req (req->msg[0], &cli_req)) {
+                //failed to decode msg;
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        gf_log ("glusterd", GF_LOG_NORMAL, "Received defrag volume on %s",
+                cli_req.volname);
+
+        glusterd_op_set_op (GD_OP_DEFRAG_VOLUME);
+
+        glusterd_op_set_ctx (GD_OP_DEFRAG_VOLUME, cli_req.volname);
+
+        /* TODO: make it more generic.. */
+        /* Create a directory, mount glusterfs over it, start glusterfs-defrag */
+        snprintf (cmd_str, 4096, "mkdir -p %s/mount/%s",
+                  priv->workdir, cli_req.volname);
+        system (cmd_str);
+
+        snprintf (cmd_str, 4096, "glusterfs -f %s/vols/%s/%s-tcp.vol "
+                  "--xlator-option distribute.unhashed-sticky-bit=yes "
+                  "--xlator-option distribute.lookup-unhashed=on %s/mount/%s",
+                  priv->workdir, cli_req.volname, cli_req.volname,
+                  priv->workdir, cli_req.volname);
+        system (cmd_str);
+
+        snprintf (cmd_str, 4096,
+                  "$(glusterfs-defrag %s/mount/%s; umount %s/mount/%s) &",
+                  priv->workdir, cli_req.volname, priv->workdir, cli_req.volname);
+        system (cmd_str);
+
+        ret = 0;
+out:
+        return ret;
+}
+
 int
 glusterd_handle_cli_get_volume (rpcsvc_request_t *req)
 {

xlators/mgmt/glusterd/src/glusterd.h

@@ -151,6 +151,9 @@ glusterd_handle_cli_probe (rpcsvc_request_t *req);
 int
 glusterd_handle_create_volume (rpcsvc_request_t *req);
 
+int
+glusterd_handle_defrag_volume (rpcsvc_request_t *req);
+
 int
 glusterd_xfer_cli_probe_resp (rpcsvc_request_t *req, int32_t op_ret,
                               int32_t op_errno, char *hostname);

xlators/mgmt/glusterd/src/glusterd3_1-mops.c

@@ -1088,6 +1088,10 @@ glusterd_handle_rpc_msg (rpcsvc_request_t *req)
                         ret = glusterd_handle_cli_get_volume (req);
                         break;
 
+                case GD_MGMT_CLI_DEFRAG_VOLUME:
+                        ret = glusterd_handle_defrag_volume (req);
+                        break;
+
                 default:
                         GF_ASSERT (0);
         }
@@ -1112,7 +1116,8 @@ rpcsvc_actor_t glusterd1_mgmt_actors[] = {
         [GD_MGMT_STAGE_OP] = { "STAGE_OP", GD_MGMT_STAGE_OP, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_COMMIT_OP] = { "COMMIT_OP", GD_MGMT_COMMIT_OP, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_PROBE] = { "CLI_PROBE", GD_MGMT_CLI_PROBE, glusterd_handle_rpc_msg, NULL, NULL},
-        [GD_MGMT_CLI_CREATE_VOLUME] = { "CLI_CREATE_VOLUME", GD_MGMT_CLI_CREATE_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
+        [GD_MGMT_CLI_CREATE_VOLUME] = { "CLI_CREATE_VOLUME", GD_MGMT_CLI_CREATE_VOLUME, glusterd_handle_rpc_msg, NULL,NULL},
+        [GD_MGMT_CLI_DEFRAG_VOLUME] = { "CLI_DEFRAG_VOLUME", GD_MGMT_CLI_DEFRAG_VOLUME, glusterd_handle_rpc_msg, NULL,NULL},
         [GD_MGMT_CLI_DEPROBE] = { "FRIEND_REMOVE", GD_MGMT_CLI_DEPROBE, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_LIST_FRIENDS] = { "LIST_FRIENDS", GD_MGMT_CLI_LIST_FRIENDS, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_START_VOLUME] = { "START_VOLUME", GD_MGMT_CLI_START_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
@@ -1139,7 +1144,6 @@ struct rpcsvc_program glusterd1_mop_prog = {
         .progver   = GLUSTERD1_MGMT_VERSION,
         .numactors = GLUSTERD1_MGMT_PROCCNT,
         .actors    = glusterd1_mgmt_actors,
-        .progport  = 4284,
 };