mgmt/glusterd, cli: Introduce gluster volume status <volname>

Change-Id: Iea835b9e448e736016da2e44e3c9bfff93f2fa78
BUG: 3439
Reviewed-on: http://review.gluster.com/259
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

7 files changed, 353 insertions, 2 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index 39f8976e833..09ed6ae2ce2 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -3875,6 +3875,63 @@ out:
 }
 
 int
+glusterd_handle_status_volume (rpcsvc_request_t *req)
+{
+        int32_t                         ret     = -1;
+        gf1_cli_status_volume_req       cli_req = {0,};
+        dict_t                          *dict    = NULL;
+        int                             lock_fail = 0;
+        glusterd_op_t                   cli_op = GD_OP_STATUS_VOLUME;
+
+        GF_ASSERT (req);
+
+        ret = glusterd_op_set_cli_op (cli_op);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to set cli op: %d",
+                        ret);
+                lock_fail = 1;
+                goto out;
+        }
+
+        ret = -1;
+        if (!gf_xdr_to_cli_status_volume_req (req->msg[0], &cli_req)) {
+                //failed to decode msg;
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        gf_log ("glusterd", GF_LOG_INFO, "Received status volume req "
+                "for volume %s", cli_req.volname);
+
+        dict = dict_new ();
+        if (!dict)
+                goto out;
+
+        ret = dict_set_dynmstr (dict, "volname", cli_req.volname);
+        if (ret)
+                goto out;
+
+        ret = glusterd_op_begin (req, GD_OP_STATUS_VOLUME, dict, _gf_true);
+
+out:
+        if (ret && dict)
+                dict_unref (dict);
+
+        glusterd_friend_sm ();
+        glusterd_op_sm ();
+
+        if (ret) {
+                ret = glusterd_op_send_cli_response (cli_op, ret, 0, req,
+                                                     NULL, "operation failed");
+                if (!lock_fail)
+                        (void) glusterd_opinfo_unlock ();
+
+        }
+
+        return ret;
+}
+
+int
 glusterd_brick_rpc_notify (struct rpc_clnt *rpc, void *mydata,
                           rpc_clnt_event_t event,
                           void *data)
@@ -4020,6 +4077,7 @@ rpcsvc_actor_t gd_svc_cli_actors[] = {
         [GLUSTER_CLI_QUOTA]         = { "QUOTA", GLUSTER_CLI_QUOTA, glusterd_handle_quota, NULL, NULL},
         [GLUSTER_CLI_LOG_LEVEL]     = {"LOG_LEVEL", GLUSTER_CLI_LOG_LEVEL, glusterd_handle_log_level, NULL, NULL},
         [GLUSTER_CLI_GETWD]         = { "GETWD", GLUSTER_CLI_GETWD, glusterd_handle_getwd, NULL, NULL},
+        [GLUSTER_CLI_STATUS_VOLUME]  = {"STATUS_VOLUME", GLUSTER_CLI_STATUS_VOLUME, glusterd_handle_status_volume, NULL, NULL},
 
 };
 
@@ -4064,7 +4122,8 @@ rpcsvc_actor_t glusterd1_mgmt_actors[] = {
         [GD_MGMT_CLI_FSM_LOG] = { "FSM_LOG", GD_MGMT_CLI_FSM_LOG, glusterd_handle_fsm_log, NULL, NULL},
         [GD_MGMT_CLI_GSYNC_SET] = {"GSYNC_SET", GD_MGMT_CLI_GSYNC_SET, glusterd_handle_gsync_set, NULL, NULL},
         [GD_MGMT_CLI_PROFILE_VOLUME] = { "STATS_VOLUME", GD_MGMT_CLI_PROFILE_VOLUME, glusterd_handle_cli_profile_volume, NULL, NULL},
-        [GD_MGMT_CLI_LOG_LEVEL] = {"LOG_LEVEL", GD_MGMT_CLI_LOG_LEVEL, glusterd_handle_log_level, NULL, NULL}
+        [GD_MGMT_CLI_LOG_LEVEL] = {"LOG_LEVEL", GD_MGMT_CLI_LOG_LEVEL, glusterd_handle_log_level, NULL, NULL},
+        [GD_MGMT_CLI_STATUS_VOLUME] = {"STATUS_VOLUME", GD_MGMT_CLI_STATUS_VOLUME, glusterd_handle_status_volume, NULL, NULL}
 };
 
 struct rpcsvc_program glusterd1_mop_prog = {
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 0875ec97ae3..a99c9fa1372 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -1856,6 +1856,48 @@ out:
         return ret;
 }
 
+static int
+glusterd_op_stage_status_volume (dict_t *dict, char **op_errstr)
+{
+        int                 ret            = -1;
+        gf_boolean_t        exists         = _gf_false;
+        char               *volname        = NULL;
+        glusterd_conf_t    *priv           = NULL;
+        xlator_t           *this           = NULL;
+        char msg[2048]                     = {0,};
+
+        GF_ASSERT (dict);
+        this = THIS;
+        GF_ASSERT (this);
+        priv = this->private;
+        GF_ASSERT(priv);
+
+
+        ret = dict_get_str (dict, "volname", &volname);
+        if (ret) {
+                gf_log ("glusterd", 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 ("glusterd", GF_LOG_ERROR, "%s", msg);
+
+                *op_errstr = gf_strdup(msg);
+                ret = -1;
+                goto out;
+        }
+
+        ret = 0;
+
+ out:
+        if (ret && !(*op_errstr))
+                *op_errstr = gf_strdup ("Validation Failed for Status");
+
+        gf_log ("glusterd", GF_LOG_DEBUG, "Returning: %d", ret);
+        return ret;
+}
 
 int
 glusterd_query_extutil (char *resbuf, runner_t *runner)
@@ -6440,6 +6482,67 @@ out:
 }
 
 static int
+glusterd_op_status_volume (dict_t *dict, char **op_errstr,
+                           dict_t *rsp_dict)
+{
+        int                     ret = -1;
+        char                    *volname = NULL;
+        int                     count = 0;
+        int                     brick_count = 0;
+        glusterd_volinfo_t      *volinfo = NULL;
+        glusterd_brickinfo_t    *brickinfo = NULL;
+        glusterd_conf_t         *priv = NULL;
+        xlator_t                *this = NULL;
+	int32_t			brick_index = 0;
+
+        this = THIS;
+        GF_ASSERT (this);
+        priv = this->private;
+
+        GF_ASSERT (priv);
+
+        GF_ASSERT (dict);
+
+
+        ret = dict_get_str (dict, "volname", &volname);
+        if (!ret) {
+                ret = glusterd_volinfo_find (volname, &volinfo);
+                if (ret) {
+                        gf_log ("", GF_LOG_ERROR, "Volume with name: %s "
+                                "does not exist", volname);
+                        goto out;
+                }
+        }
+
+        if (!rsp_dict) {
+                //this should happen only on source
+                ret = 0;
+                rsp_dict = glusterd_op_get_ctx (GD_OP_STATUS_VOLUME);
+        }
+
+        if (volname) {
+                list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
+                        if (!uuid_compare (brickinfo->uuid, priv->uuid)) {
+                                ret = glusterd_add_brick_to_dict (volinfo,
+                                                                  brickinfo,
+                                                                  rsp_dict,
+                                                                  brick_index);
+                                count++;
+                                brick_count = count;
+                        }
+			brick_index++;
+                }
+        }
+
+        ret = dict_set_int32 (rsp_dict, "count", brick_count);
+
+out:
+        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+static int
 glusterd_op_ac_none (glusterd_op_sm_event_t *event, void *ctx)
 {
         int ret = 0;
@@ -6664,6 +6767,7 @@ glusterd_op_build_payload (glusterd_op_t op, dict_t **req)
                 case GD_OP_GSYNC_SET:
                 case GD_OP_PROFILE_VOLUME:
                 case GD_OP_LOG_LEVEL:
+                case GD_OP_STATUS_VOLUME:
                         {
                                 dict_t  *dict = ctx;
                                 dict_copy (dict, req_dict);
@@ -7628,6 +7732,10 @@ glusterd_op_stage_validate (glusterd_op_t op, dict_t *dict, char **op_errstr,
                         ret = glusterd_op_stage_log_level (dict, op_errstr);
                         break;
 
+                case GD_OP_STATUS_VOLUME:
+                        ret = glusterd_op_stage_status_volume (dict, op_errstr);
+                        break;
+
                 default:
                         gf_log ("", GF_LOG_ERROR, "Unknown op %d",
                                 op);
@@ -7711,6 +7819,10 @@ glusterd_op_commit_perform (glusterd_op_t op, dict_t *dict, char **op_errstr,
                        ret = glusterd_op_log_level (dict);
                        break;
 
+               case GD_OP_STATUS_VOLUME:
+                       ret = glusterd_op_status_volume (dict, op_errstr, rsp_dict);
+                       break;
+
                 default:
                         gf_log ("", GF_LOG_ERROR, "Unknown op %d",
                                 op);
@@ -8733,6 +8845,7 @@ glusterd_op_free_ctx (glusterd_op_t op, void *ctx, gf_boolean_t ctx_free)
                 case GD_OP_QUOTA:
                 case GD_OP_PROFILE_VOLUME:
                 case GD_OP_LOG_LEVEL:
+                case GD_OP_STATUS_VOLUME:
                         dict_unref (ctx);
                         break;
                 case GD_OP_DELETE_VOLUME:
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.h b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
index 5dc1a56372a..b95d584aca6 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.h
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
@@ -163,6 +163,11 @@ typedef struct glusterd_pr_brick_rsp_conv_t {
         dict_t *dict;
 } glusterd_pr_brick_rsp_conv_t;
 
+typedef struct glusterd_status_rsp_conv_ {
+        int count;
+        dict_t *dict;
+} glusterd_status_rsp_conv_t;
+
 typedef struct glusterd_gsync_slaves {
         char *slave;
         char *host_uuid;
diff --git a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
index fa60430da91..36868d3ce3c 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
@@ -57,7 +57,7 @@ glusterd_op_send_cli_response (glusterd_op_t op, int32_t op_ret,
         dict_t          *ctx = NULL;
         char            *free_ptr = NULL;
         glusterd_conf_t *conf = NULL;
-        xdrproc_t       xdrproc;
+        xdrproc_t       xdrproc = NULL;
 
         GF_ASSERT (THIS);
 
@@ -407,6 +407,26 @@ glusterd_op_send_cli_response (glusterd_op_t op, int32_t op_ret,
                 break;
         }
 
+
+        case GD_OP_STATUS_VOLUME:
+        {
+                gf1_cli_status_volume_rsp rsp = {0,};
+                rsp.op_ret = op_ret;
+                rsp.op_errno = op_errno;
+                if (op_errstr)
+                        rsp.op_errstr = op_errstr;
+                else
+                        rsp.op_errstr = "";
+                ctx = op_ctx;
+                dict_allocate_and_serialize (ctx,
+                             &rsp.dict.dict_val,
+                             (size_t*)&rsp.dict.dict_len);
+                free_ptr = rsp.dict.dict_val;
+                cli_rsp = &rsp;
+                sfunc = gf_xdr_serialize_cli_status_volume_rsp;
+                xdrproc = (xdrproc_t) xdr_gf1_cli_status_volume_rsp;
+                break;
+        }
         case GD_OP_NONE:
         case GD_OP_MAX:
         {
@@ -1219,6 +1239,62 @@ out:
         return ret;
 }
 
+void
+glusterd_volume_status_add_peer_rsp (dict_t *this, char *key, data_t *value,
+                                     void *data)
+{
+        glusterd_status_rsp_conv_t      *rsp_ctx = NULL;
+        data_t                          *new_value = NULL;
+        int32_t                         ret = 0;
+
+        if (strcmp (key, "count") == 0)
+                return;
+
+        rsp_ctx = data;
+        new_value = data_copy (value);
+        GF_ASSERT (new_value);
+
+        ret = dict_set (rsp_ctx->dict, key, new_value);
+        if (ret)
+                gf_log ("", GF_LOG_ERROR, "Unable to set key: %s in dict",
+                        key);
+
+        return;
+}
+
+int
+glusterd_volume_status_use_rsp_dict (dict_t *rsp_dict)
+{
+        int                             ret = 0;
+        glusterd_status_rsp_conv_t      rsp_ctx = {0};
+        int32_t                         brick_count = 0;
+        int32_t                         count = 0;
+        dict_t                          *ctx_dict = NULL;
+        glusterd_op_t                   op = GD_OP_NONE;
+
+        GF_ASSERT (rsp_dict);
+
+        ret = dict_get_int32 (rsp_dict, "count", &brick_count);
+        if (ret) {
+                ret = 0; //no bricks in the rsp
+                goto out;
+        }
+
+        op = glusterd_op_get_op ();
+        GF_ASSERT (GD_OP_STATUS_VOLUME == op);
+        ctx_dict = glusterd_op_get_ctx (op);
+
+        ret = dict_get_int32 (ctx_dict, "count", &count);
+        rsp_ctx.count = count;
+        rsp_ctx.dict = ctx_dict;
+        dict_foreach (rsp_dict, glusterd_volume_status_add_peer_rsp, &rsp_ctx);
+        dict_del (ctx_dict, "count");
+        ret = dict_get_int32 (ctx_dict, "count", &brick_count);
+        ret = dict_set_int32 (ctx_dict, "count", count + brick_count);
+out:
+        return ret;
+}
+
 int32_t
 glusterd3_1_commit_op_cbk (struct rpc_req *req, struct iovec *iov,
                           int count, void *myframe)
@@ -1330,6 +1406,12 @@ glusterd3_1_commit_op_cbk (struct rpc_req *req, struct iovec *iov,
                                 goto out;
                 break;
 
+                case GD_OP_STATUS_VOLUME:
+                        ret = glusterd_volume_status_use_rsp_dict (dict);
+                        if (ret)
+                                goto out;
+                break;
+
                 default:
                 break;
                 }
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index fb7f75c523b..278b25c954a 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -2538,6 +2538,93 @@ out:
         return -1;
 }
 
+int32_t
+glusterd_add_brick_to_dict (glusterd_volinfo_t *volinfo,
+                            glusterd_brickinfo_t *brickinfo,
+                            dict_t  *dict, int32_t count)
+{
+
+        int             ret = -1;
+        char            key[8192] = {0,};
+        char            base_key[8192] = {0};
+        char            pidfile[PATH_MAX] = {0};
+        char            path[PATH_MAX] = {0};
+        FILE            *file = NULL;
+        int32_t         pid = -1;
+        xlator_t        *this = NULL;
+        glusterd_conf_t *priv = NULL;
+
+        GF_ASSERT (volinfo);
+        GF_ASSERT (brickinfo);
+        GF_ASSERT (dict);
+
+        this = THIS;
+        GF_ASSERT (this);
+
+        priv = this->private;
+
+        snprintf (base_key, sizeof (base_key), "brick%d", count);
+        snprintf (key, sizeof (key), "%s.hostname", base_key);
+        ret = dict_set_str (dict, key, brickinfo->hostname);
+        if (ret)
+                goto out;
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.path", base_key);
+        ret = dict_set_str (dict, key, brickinfo->path);
+        if (ret)
+                goto out;
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.port", base_key);
+        ret = dict_set_int32 (dict, key, brickinfo->port);
+        if (ret)
+                goto out;
+
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.status", base_key);
+        ret = dict_set_int32 (dict, key, brickinfo->signed_in);
+        if (ret)
+                goto out;
+
+        if (!brickinfo->signed_in)
+                goto out;
+
+
+        GLUSTERD_GET_VOLUME_DIR (path, volinfo, priv);
+        GLUSTERD_GET_BRICK_PIDFILE (pidfile, path, brickinfo->hostname,
+                                    brickinfo->path);
+
+        file = fopen (pidfile, "r+");
+        if (!file) {
+                gf_log ("", GF_LOG_ERROR, "Unable to open pidfile: %s",
+                        pidfile);
+                ret = -1;
+                goto out;
+        }
+
+        ret = fscanf (file, "%d", &pid);
+        if (ret <= 0) {
+                gf_log ("", GF_LOG_ERROR, "Unable to read pidfile: %s",
+                        pidfile);
+                ret = -1;
+                goto out;
+        }
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.pid", base_key);
+        ret = dict_set_int32 (dict, key, pid);
+        if (ret)
+                goto out;
+
+out:
+        if (ret)
+                gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
 int
 glusterd_all_volume_cond_check (glusterd_condition_func func, int status,
                                 void *ctx)
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.h b/xlators/mgmt/glusterd/src/glusterd-utils.h
index 1f5223fefc1..93e2cb92d22 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.h
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.h
@@ -282,4 +282,8 @@ glusterd_recreate_bricks (glusterd_conf_t *conf);
 int32_t
 glusterd_handle_upgrade_downgrade (dict_t *options, glusterd_conf_t *conf);
 
+int32_t
+glusterd_add_brick_to_dict (glusterd_volinfo_t *volinfo,
+                            glusterd_brickinfo_t *brickinfo,
+                            dict_t  *dict, int32_t count);
 #endif
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index ab4049d0ba5..4362984fef4 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -77,6 +77,7 @@ typedef enum glusterd_op_ {
         GD_OP_PROFILE_VOLUME,
         GD_OP_QUOTA,
         GD_OP_LOG_LEVEL,
+        GD_OP_STATUS_VOLUME,
         GD_OP_MAX,
 } glusterd_op_t;