DVM: Changes for remove brick

Signed-off-by: Vijay Bellur <vijay@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 1220 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1220

7 files changed, 393 insertions, 1 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index c1ab571197b..8fe0b31a6cb 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -816,6 +816,44 @@ out:
 }
 
 int
+glusterd_handle_remove_brick (rpcsvc_request_t *req)
+{
+        int32_t                         ret = -1;
+        gf1_cli_remove_brick_req        cli_req = {0,};
+        dict_t                          *dict = NULL;
+
+        GF_ASSERT (req);
+
+        if (!gf_xdr_to_cli_remove_brick_req (req->msg[0], &cli_req)) {
+                //failed to decode msg;
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        gf_log ("glusterd", GF_LOG_NORMAL, "Received rem brick req");
+
+        if (cli_req.bricks.bricks_len) {
+                /* Unserialize the dictionary */
+                dict  = dict_new ();
+
+                ret = dict_unserialize (cli_req.bricks.bricks_val,
+                                        cli_req.bricks.bricks_len,
+                                        &dict);
+                if (ret < 0) {
+                        gf_log ("glusterd", GF_LOG_ERROR,
+                                "failed to "
+                                "unserialize req-buffer to dictionary");
+                        goto out;
+                }
+        }
+
+        ret = glusterd_remove_brick (req, dict);
+
+out:
+        return ret;
+}
+
+int
 glusterd_op_lock_send_resp (rpcsvc_request_t *req, int32_t status)
 {
 
@@ -1587,6 +1625,24 @@ glusterd_add_brick (rpcsvc_request_t *req, dict_t *dict)
 }
 
 int32_t
+glusterd_remove_brick (rpcsvc_request_t *req, dict_t *dict)
+{
+        int32_t      ret       = -1;
+
+        GF_ASSERT (req);
+        GF_ASSERT (dict);
+
+        glusterd_op_set_op (GD_OP_REMOVE_BRICK);
+
+        glusterd_op_set_ctx (GD_OP_REMOVE_BRICK, dict);
+        glusterd_op_set_req (req);
+
+        ret = glusterd_op_txn_begin ();
+
+        return ret;
+}
+
+int32_t
 glusterd_list_friends (rpcsvc_request_t *req, dict_t *dict, int32_t flags)
 {
         int32_t                 ret = -1;
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 0871dfedc19..1a954cce2e8 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -90,7 +90,15 @@ glusterd_op_get_len (glusterd_op_t op)
                                 ret = dict_serialized_length (dict);
                                 return ret;
                         }
+
+                 case GD_OP_REMOVE_BRICK:
+                        {
+                                dict_t *dict = glusterd_op_get_ctx (op);
+                                ret = dict_serialized_length (dict);
+                                return ret;
+                        }
                         break;
+                       break;
 
                 default:
                         GF_ASSERT (op);
@@ -202,6 +210,20 @@ glusterd_op_build_payload (glusterd_op_t op, gd1_mgmt_stage_op_req **req)
                         }
                         break;
 
+                case GD_OP_REMOVE_BRICK:
+                        {
+                                dict_t  *dict = NULL;
+                                dict = glusterd_op_get_ctx (op);
+                                GF_ASSERT (dict);
+                                ret = dict_allocate_and_serialize (dict,
+                                                &stage_req->buf.buf_val,
+                                        (size_t *)&stage_req->buf.buf_len);
+                                if (ret) {
+                                        goto out;
+                                }
+                        }
+                        break;
+
                 default:
                         break;
         }
@@ -511,6 +533,52 @@ out:
 }
 
 static int
+glusterd_op_stage_remove_brick (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 exists",
+                        volname);
+                ret = -1;
+                goto out;
+        } else {
+                ret = 0;
+        }
+
+out:
+        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+
+static int
 glusterd_op_create_volume (gd1_mgmt_stage_op_req *req)
 {
         int                                     ret = 0;
@@ -759,6 +827,126 @@ out:
 }
 
 static int
+glusterd_op_remove_brick (gd1_mgmt_stage_op_req *req)
+{
+        int                                     ret = 0;
+        dict_t                                  *dict = NULL;
+        char                                    *volname = NULL;
+        glusterd_conf_t                         *priv = NULL;
+        glusterd_volinfo_t                      *volinfo = NULL;
+        glusterd_brickinfo_t                    *brickinfo = NULL;
+        xlator_t                                *this = NULL;
+        char                                    *brick = NULL;
+        int32_t                                 count = 0;
+        int32_t                                 i = 1;
+        gf_boolean_t                            glfs_stopped = _gf_false;
+        int32_t                                 mybrick = 0;
+        char                                    key[256] = {0,};
+        char                                    *dup_brick = NULL;
+
+        GF_ASSERT (req);
+
+        this = THIS;
+        GF_ASSERT (this);
+
+        priv = this->private;
+        GF_ASSERT (priv);
+
+        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 = dict_get_int32 (dict, "count", &count);
+        if (ret) {
+                gf_log ("", GF_LOG_ERROR, "Unable to get count");
+                goto out;
+        }
+
+
+        while ( i <= count) {
+                snprintf (key, 256, "brick%d", i);
+                ret = dict_get_str (dict, key, &brick);
+                if (ret) {
+                        gf_log ("", GF_LOG_ERROR, "Unable to get %s", key);
+                        goto out;
+                }
+                dup_brick = gf_strdup (brick);
+
+                ret = glusterd_brickinfo_get (dup_brick, volinfo,  &brickinfo);
+                if (ret)
+                        goto out;
+
+
+                ret = glusterd_resolve_brick (brickinfo);
+
+                if (ret)
+                        goto out;
+
+                if (!uuid_compare (brickinfo->uuid, priv->uuid)) {
+                        ret =
+                          glusterd_volume_create_generate_volfiles (volinfo);
+                        if (ret)
+                                goto out;
+
+                        gf_log ("", GF_LOG_NORMAL, "About to stop glusterfs"
+                                " for brick %s:%s", brickinfo->hostname,
+                                brickinfo->path);
+                        ret = glusterd_volume_stop_glusterfs
+                                                (volinfo, brickinfo, mybrick);
+                        if (ret) {
+                                gf_log ("", GF_LOG_ERROR, "Unable to start "
+                                        "glusterfs, ret: %d", ret);
+                                goto out;
+                        }
+                        glusterd_brickinfo_delete (brickinfo);
+                        glfs_stopped = _gf_true;
+                        mybrick++;
+                }
+
+                i++;
+        }
+
+        if (!glfs_stopped) {
+                ret = glusterd_volume_create_generate_volfiles (volinfo);
+                if (ret)
+                        goto out;
+        }
+
+/*        ret = glusterd_ha_update_volume (volinfo);
+
+        if (ret)
+                goto out;
+*/
+
+
+out:
+        return ret;
+}
+
+
+static int
 glusterd_op_delete_volume (gd1_mgmt_stage_op_req *req)
 {
         int                                     ret = 0;
@@ -1225,6 +1413,17 @@ glusterd_op_send_cli_response (int32_t op, int32_t op_ret,
                                 sfunc = gf_xdr_serialize_cli_add_brick_rsp;
                                 break;
                         }
+
+                case GD_MGMT_CLI_REMOVE_BRICK:
+                        {
+                                gf1_cli_remove_brick_rsp rsp = {0,};
+                                rsp.op_ret = op_ret;
+                                rsp.op_errno = op_errno;
+                                rsp.volname = "";
+                                cli_rsp = &rsp;
+                                sfunc = gf_xdr_serialize_cli_remove_brick_rsp;
+                                break;
+                        }
         }
 
 
@@ -1246,6 +1445,7 @@ glusterd_op_txn_complete ()
 {
         int32_t                 ret = -1;
         glusterd_conf_t         *priv = NULL;
+        int32_t                 op = -1;
 
         priv = THIS->private;
         GF_ASSERT (priv);
@@ -1265,6 +1465,16 @@ glusterd_op_txn_complete ()
 
         opinfo.op_ret = 0;
         opinfo.op_errno = 0;
+
+        op = glusterd_op_get_op ();
+
+        if (op != -1) {
+                glusterd_op_clear_pending_op (op);
+                glusterd_op_clear_commit_op (op);
+                glusterd_op_clear_op (op);
+                glusterd_op_clear_ctx (op);
+        }
+
 out:
         pthread_mutex_unlock (&opinfo.lock);
         gf_log ("glusterd", GF_LOG_NORMAL, "Returning %d", ret);
@@ -1395,6 +1605,10 @@ glusterd_op_stage_validate (gd1_mgmt_stage_op_req *req)
                         ret = glusterd_op_stage_add_brick (req);
                         break;
 
+                case GD_OP_REMOVE_BRICK:
+                        ret = glusterd_op_stage_remove_brick (req);
+                        break;
+
                 default:
                         gf_log ("", GF_LOG_ERROR, "Unknown op %d",
                                 req->op);
@@ -1433,6 +1647,11 @@ glusterd_op_commit_perform (gd1_mgmt_stage_op_req *req)
                 case GD_OP_ADD_BRICK:
                         ret = glusterd_op_add_brick (req);
                         break;
+
+                case GD_OP_REMOVE_BRICK:
+                        ret = glusterd_op_remove_brick (req);
+                        break;
+
                 default:
                         gf_log ("", GF_LOG_ERROR, "Unknown op %d",
                                 req->op);
@@ -1695,6 +1914,28 @@ glusterd_op_set_op (glusterd_op_t op)
 }
 
 int32_t
+glusterd_op_get_op ()
+{
+
+        int     i = 0;
+        int32_t ret = 0;
+
+        for ( i = 0; i < GD_OP_MAX; i++) {
+                if (opinfo.op[i])
+                        break;
+        }
+
+        if ( i == GD_OP_MAX)
+                ret = -1;
+        else
+                ret = i;
+
+        return ret;
+
+}
+
+
+int32_t
 glusterd_op_set_cli_op (gf_mgmt_procnum op)
 {
 
@@ -1748,6 +1989,19 @@ glusterd_op_clear_commit_op (glusterd_op_t op)
 }
 
 int32_t
+glusterd_op_clear_op (glusterd_op_t op)
+{
+
+        GF_ASSERT (op < GD_OP_MAX);
+        GF_ASSERT (op > GD_OP_NONE);
+
+        opinfo.op[op] = 0;
+
+        return 0;
+
+}
+
+int32_t
 glusterd_op_set_ctx (glusterd_op_t op, void *ctx)
 {
 
@@ -1760,6 +2014,23 @@ glusterd_op_set_ctx (glusterd_op_t op, void *ctx)
 
 }
 
+int32_t
+glusterd_op_clear_ctx (glusterd_op_t op)
+{
+
+        void    *ctx = NULL;
+
+        GF_ASSERT (op < GD_OP_MAX);
+        GF_ASSERT (op > GD_OP_NONE);
+
+        ctx = opinfo.op_ctx[op];
+
+        if (ctx)
+                GF_FREE (ctx);
+
+        return 0;
+
+}
 
 void *
 glusterd_op_get_ctx (glusterd_op_t op)
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.h b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
index 4a619ba3ad2..1bcfbb5bfb1 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.h
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
@@ -198,4 +198,18 @@ glusterd_op_set_cli_op (gf_mgmt_procnum op);
 int32_t
 glusterd_op_send_cli_response (int32_t op, int32_t op_ret,
                                int32_t op_errno, rpcsvc_request_t *req);
+int32_t
+glusterd_op_get_op ();
+
+int32_t
+glusterd_op_clear_pending_op (glusterd_op_t op);
+
+int32_t
+glusterd_op_clear_commit_op (glusterd_op_t op);
+
+int32_t
+glusterd_op_clear_op (glusterd_op_t op);
+
+int32_t
+glusterd_op_clear_ctx (glusterd_op_t op);
 #endif
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index fb76d1f0305..1d4a8d2ec69 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -626,6 +626,43 @@ out:
 
 
 int32_t
+glusterd_brickinfo_get (char *brick, glusterd_volinfo_t *volinfo,
+                        glusterd_brickinfo_t **brickinfo)
+{
+        int32_t                 ret = -1;
+        char                    *hostname = NULL;
+        char                    *path = NULL;
+        glusterd_brickinfo_t    *tmp = NULL;
+
+        GF_ASSERT (brick);
+        GF_ASSERT (brickinfo);
+        GF_ASSERT (volinfo);
+
+        gf_log ("", GF_LOG_NORMAL, "brick: %s", brick);
+
+        hostname = strtok (brick, ":");
+        path = strtok (NULL, ":");
+
+        GF_ASSERT (hostname);
+        GF_ASSERT (path);
+
+        list_for_each_entry (tmp, &volinfo->bricks, brick_list) {
+
+                if ((!strcmp (tmp->hostname, hostname)) &&
+                        !strcmp (tmp->path, path)) {
+                        gf_log ("", GF_LOG_NORMAL, "Found brick");
+                        ret = 0;
+                        break;
+                }
+        }
+
+        *brickinfo = tmp;
+
+        gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
+        return ret;
+}
+
+int32_t
 glusterd_friend_cleanup (glusterd_peerinfo_t *peerinfo)
 {
         GF_ASSERT (peerinfo);
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.h b/xlators/mgmt/glusterd/src/glusterd-utils.h
index 39a0cdb197f..fc8b33ab1b9 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.h
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.h
@@ -111,4 +111,8 @@ glusterd_brickinfo_delete (glusterd_brickinfo_t *brickinfo);
 
 gf_boolean_t
 glusterd_is_cli_op_req (int32_t op);
+
+int32_t
+glusterd_brickinfo_get (char *brick, glusterd_volinfo_t *volinfo,
+                        glusterd_brickinfo_t **brickinfo);
 #endif
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index 5fccc0199bd..6446f2fc111 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -218,4 +218,10 @@ glusterd_add_brick (rpcsvc_request_t *req, dict_t *dict);
 
 int
 glusterd_handle_add_brick (rpcsvc_request_t *req);
+
+int
+glusterd_handle_remove_brick (rpcsvc_request_t *req);
+
+int32_t
+glusterd_remove_brick (rpcsvc_request_t *req, dict_t *dict);
 #endif
diff --git a/xlators/mgmt/glusterd/src/glusterd3_1-mops.c b/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
index 9b44465cf23..1a2cb7449c6 100644
--- a/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
+++ b/xlators/mgmt/glusterd/src/glusterd3_1-mops.c
@@ -1169,6 +1169,9 @@ glusterd_handle_rpc_msg (rpcsvc_request_t *req)
                         ret = glusterd_handle_add_brick (req);
                         break;
 
+                case GD_MGMT_CLI_REMOVE_BRICK:
+                        ret = glusterd_handle_remove_brick (req);
+                        break;
                 default:
                         GF_ASSERT (0);
         }
@@ -1204,7 +1207,8 @@ rpcsvc_actor_t glusterd1_mgmt_actors[] = {
         [GD_MGMT_CLI_STOP_VOLUME] = { "STOP_VOLUME", GD_MGMT_CLI_STOP_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_DELETE_VOLUME] = { "DELETE_VOLUME", GD_MGMT_CLI_DELETE_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
         [GD_MGMT_CLI_GET_VOLUME] = { "GET_VOLUME", GD_MGMT_CLI_GET_VOLUME, glusterd_handle_rpc_msg, NULL, NULL},
-        [GD_MGMT_CLI_ADD_BRICK] = { "GET_VOLUME", GD_MGMT_CLI_ADD_BRICK, glusterd_handle_rpc_msg, NULL, NULL},
+        [GD_MGMT_CLI_ADD_BRICK] = { "ADD_BRICK", GD_MGMT_CLI_ADD_BRICK, glusterd_handle_rpc_msg, NULL, NULL},
+        [GD_MGMT_CLI_REMOVE_BRICK] = { "REMOVE_BRICK", GD_MGMT_CLI_REMOVE_BRICK, glusterd_handle_rpc_msg, NULL, NULL},
 };
 
 /*rpcsvc_actor_t glusterd1_mgmt_actors[] = {