source3/lib/ctdbd_conn.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba internal messaging functions
   4    Copyright (C) 2007 by Volker Lendecke
   5    Copyright (C) 2007 by Andrew Tridgell
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22
  23 #ifdef CLUSTER_SUPPORT
  24
  25 #include "librpc/gen_ndr/messaging.h"
  26 #include "librpc/gen_ndr/ndr_messaging.h"
  27
  28 /* paths to these include files come from --with-ctdb= in configure */
  29 #include "ctdb.h"
  30 #include "ctdb_private.h"
  31
  32 struct ctdbd_connection {
  33         struct messaging_context *msg_ctx;
  34         uint32 reqid;
  35         uint32 our_vnn;
  36         uint64 rand_srvid;
  37         struct packet_context *pkt;
  38         struct fd_event *fde;
  39
  40         void (*release_ip_handler)(const char *ip_addr, void *private_data);
  41         void *release_ip_priv;
  42 };
  43
  44 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
  45                               uint32_t vnn, uint32 opcode,
  46                               uint64_t srvid, uint32_t flags, TDB_DATA data,
  47                               TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
  48                               int *cstatus);
  49
  50 /*
  51  * exit on fatal communications errors with the ctdbd daemon
  52  */
  53 static void cluster_fatal(const char *why)
  54 {
  55         DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
  56         /* we don't use smb_panic() as we don't want to delay to write
  57            a core file. We need to release this process id immediately
  58            so that someone else can take over without getting sharing
  59            violations */
  60         _exit(0);
  61 }
  62
  63 /*
  64  *
  65  */
  66 static void ctdb_packet_dump(struct ctdb_req_header *hdr)
  67 {
  68         if (DEBUGLEVEL < 10) {
  69                 return;
  70         }
  71         DEBUGADD(10, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
  72                       (int)hdr->length, (int)hdr->ctdb_magic,
  73                       (int)hdr->ctdb_version, (int)hdr->generation,
  74                       (int)hdr->operation, (int)hdr->reqid));
  75 }
  76
  77 /*
  78  * Register a srvid with ctdbd
  79  */
  80 static NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn,
  81                                     uint64_t srvid)
  82 {
  83
  84         int cstatus;
  85         return ctdbd_control(conn, CTDB_CURRENT_NODE,
  86                              CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
  87                              tdb_null, NULL, NULL, &cstatus);
  88 }
  89
  90 /*
  91  * get our vnn from the cluster
  92  */
  93 static NTSTATUS get_cluster_vnn(struct ctdbd_connection *conn, uint32 *vnn)
  94 {
  95         int32_t cstatus=-1;
  96         NTSTATUS status;
  97         status = ctdbd_control(conn,
  98                                CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
  99                                tdb_null, NULL, NULL, &cstatus);
 100         if (!NT_STATUS_IS_OK(status)) {
 101                 cluster_fatal("ctdbd_control failed\n");
 102         }
 103         *vnn = (uint32_t)cstatus;
 104         return status;
 105 }
 106
 107 uint32 ctdbd_vnn(const struct ctdbd_connection *conn)
 108 {
 109         return conn->our_vnn;
 110 }
 111
 112 /*
 113  * Get us a ctdb connection
 114  */
 115
 116 static NTSTATUS ctdbd_connect(TALLOC_CTX *mem_ctx,
 117                               struct packet_context **presult)
 118 {
 119         struct packet_context *result;
 120         const char *sockname = lp_ctdbd_socket();
 121         struct sockaddr_un addr;
 122         int fd;
 123
 124         if (!sockname || !*sockname) {
 125                 sockname = CTDB_PATH;
 126         }
 127
 128         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 129         if (fd == -1) {
 130                 DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
 131                 return map_nt_error_from_unix(errno);
 132         }
 133
 134         ZERO_STRUCT(addr);
 135         addr.sun_family = AF_UNIX;
 136         strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
 137
 138         if (sys_connect(fd, (struct sockaddr *)&addr) == -1) {
 139                 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
 140                           strerror(errno)));
 141                 close(fd);
 142                 return map_nt_error_from_unix(errno);
 143         }
 144
 145         if (!(result = packet_init(mem_ctx, fd))) {
 146                 close(fd);
 147                 return NT_STATUS_NO_MEMORY;
 148         }
 149
 150         *presult = result;
 151         return NT_STATUS_OK;
 152 }
 153
 154 /*
 155  * Do we have a complete ctdb packet in the queue?
 156  */
 157
 158 static bool ctdb_req_complete(const uint8_t *buf, size_t available,
 159                               size_t *length,
 160                               void *private_data)
 161 {
 162         uint32 msglen;
 163
 164         if (available < sizeof(msglen)) {
 165                 return False;
 166         }
 167
 168         msglen = *((uint32 *)buf);
 169
 170         DEBUG(10, ("msglen = %d\n", msglen));
 171
 172         if (msglen < sizeof(struct ctdb_req_header)) {
 173                 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
 174                           "the req_header\n", (int)msglen,
 175                           (int)sizeof(struct ctdb_req_header)));
 176                 cluster_fatal("ctdbd protocol error\n");
 177         }
 178
 179         if (available < msglen) {
 180                 return false;
 181         }
 182
 183         *length = msglen;
 184         return true;
 185 }
 186
 187 /*
 188  * State necessary to defer an incoming message while we are waiting for a
 189  * ctdb reply.
 190  */
 191
 192 struct deferred_msg_state {
 193         struct messaging_context *msg_ctx;
 194         struct messaging_rec *rec;
 195 };
 196
 197 /*
 198  * Timed event handler for the deferred message
 199  */
 200
 201 static void deferred_message_dispatch(struct event_context *event_ctx,
 202                                       struct timed_event *te,
 203                                       struct timeval now,
 204                                       void *private_data)
 205 {
 206         struct deferred_msg_state *state = talloc_get_type_abort(
 207                 private_data, struct deferred_msg_state);
 208
 209         messaging_dispatch_rec(state->msg_ctx, state->rec);
 210         TALLOC_FREE(state);
 211         TALLOC_FREE(te);
 212 }
 213
 214 struct req_pull_state {
 215         TALLOC_CTX *mem_ctx;
 216         DATA_BLOB req;
 217 };
 218
 219 /*
 220  * Pull a ctdb request out of the incoming packet queue
 221  */
 222
 223 static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
 224                               void *private_data)
 225 {
 226         struct req_pull_state *state = (struct req_pull_state *)private_data;
 227
 228         state->req.data = talloc_move(state->mem_ctx, &buf);
 229         state->req.length = length;
 230         return NT_STATUS_OK;
 231 }
 232
 233 /*
 234  * Fetch a messaging_rec from an incoming ctdb style message
 235  */
 236
 237 static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
 238                                                      size_t overall_length,
 239                                                      struct ctdb_req_message *msg)
 240 {
 241         struct messaging_rec *result;
 242         DATA_BLOB blob;
 243         enum ndr_err_code ndr_err;
 244
 245         if ((overall_length < offsetof(struct ctdb_req_message, data))
 246             || (overall_length
 247                 < offsetof(struct ctdb_req_message, data) + msg->datalen)) {
 248
 249                 cluster_fatal("got invalid msg length");
 250         }
 251
 252         if (!(result = TALLOC_P(mem_ctx, struct messaging_rec))) {
 253                 DEBUG(0, ("talloc failed\n"));
 254                 return NULL;
 255         }
 256
 257         blob = data_blob_const(msg->data, msg->datalen);
 258
 259         ndr_err = ndr_pull_struct_blob(
 260                 &blob, result, NULL, result,
 261                 (ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
 262
 263         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 264                 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
 265                           ndr_errstr(ndr_err)));
 266                 TALLOC_FREE(result);
 267                 return NULL;
 268         }
 269
 270         if (DEBUGLEVEL >= 10) {
 271                 DEBUG(10, ("ctdb_pull_messaging_rec:\n"));
 272                 NDR_PRINT_DEBUG(messaging_rec, result);
 273         }
 274
 275         return result;
 276 }
 277
 278 static NTSTATUS ctdb_packet_fd_read_sync(struct packet_context *ctx)
 279 {
 280         struct timeval timeout;
 281         struct timeval *ptimeout;
 282
 283         timeout = timeval_set(lp_ctdb_timeout(), 0);
 284         ptimeout = (timeout.tv_sec != 0) ? &timeout : NULL;
 285
 286         return packet_fd_read_sync(ctx, ptimeout);
 287 }
 288
 289 /*
 290  * Read a full ctdbd request. If we have a messaging context, defer incoming
 291  * messages that might come in between.
 292  */
 293
 294 static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
 295                               TALLOC_CTX *mem_ctx, void *result)
 296 {
 297         struct ctdb_req_header *hdr;
 298         struct req_pull_state state;
 299         NTSTATUS status;
 300
 301  again:
 302
 303         status = ctdb_packet_fd_read_sync(conn->pkt);
 304
 305         if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
 306                 /* EAGAIN */
 307                 goto again;
 308         } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
 309                 /* EAGAIN */
 310                 goto again;
 311         }
 312
 313         if (!NT_STATUS_IS_OK(status)) {
 314                 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
 315                 cluster_fatal("ctdbd died\n");
 316         }
 317
 318  next_pkt:
 319
 320         ZERO_STRUCT(state);
 321         state.mem_ctx = mem_ctx;
 322
 323         if (!packet_handler(conn->pkt, ctdb_req_complete, ctdb_req_pull,
 324                             &state, &status)) {
 325                 /*
 326                  * Not enough data
 327                  */
 328                 DEBUG(10, ("not enough data from ctdb socket, retrying\n"));
 329                 goto again;
 330         }
 331
 332         if (!NT_STATUS_IS_OK(status)) {
 333                 DEBUG(0, ("Could not read packet: %s\n", nt_errstr(status)));
 334                 cluster_fatal("ctdbd died\n");
 335         }
 336
 337         hdr = (struct ctdb_req_header *)state.req.data;
 338
 339         DEBUG(10, ("Received ctdb packet\n"));
 340         ctdb_packet_dump(hdr);
 341
 342         if (hdr->operation == CTDB_REQ_MESSAGE) {
 343                 struct timed_event *evt;
 344                 struct deferred_msg_state *msg_state;
 345                 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
 346
 347                 if (conn->msg_ctx == NULL) {
 348                         DEBUG(1, ("Got a message without having a msg ctx, "
 349                                   "dropping msg %llu\n",
 350                                   (long long unsigned)msg->srvid));
 351                         goto next_pkt;
 352                 }
 353
 354                 if ((conn->release_ip_handler != NULL)
 355                     && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
 356                         /* must be dispatched immediately */
 357                         DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
 358                         conn->release_ip_handler((const char *)msg->data,
 359                                                  conn->release_ip_priv);
 360                         TALLOC_FREE(hdr);
 361                         goto next_pkt;
 362                 }
 363
 364                 if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
 365                         DEBUG(0,("Got cluster reconfigure message in ctdb_read_req\n"));
 366                         messaging_send(conn->msg_ctx, procid_self(),
 367                                        MSG_SMB_BRL_VALIDATE, &data_blob_null);
 368                         TALLOC_FREE(hdr);
 369                         goto next_pkt;
 370                 }
 371
 372                 if (!(msg_state = TALLOC_P(talloc_autofree_context(), struct deferred_msg_state))) {
 373                         DEBUG(0, ("talloc failed\n"));
 374                         TALLOC_FREE(hdr);
 375                         goto next_pkt;
 376                 }
 377
 378                 if (!(msg_state->rec = ctdb_pull_messaging_rec(
 379                               msg_state, state.req.length, msg))) {
 380                         DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
 381                         TALLOC_FREE(msg_state);
 382                         TALLOC_FREE(hdr);
 383                         goto next_pkt;
 384                 }
 385
 386                 TALLOC_FREE(hdr);
 387
 388                 msg_state->msg_ctx = conn->msg_ctx;
 389
 390                 /*
 391                  * We're waiting for a call reply, but an async message has
 392                  * crossed. Defer dispatching to the toplevel event loop.
 393                  */
 394                 evt = event_add_timed(conn->msg_ctx->event_ctx,
 395                                       conn->msg_ctx->event_ctx,
 396                                       timeval_zero(),
 397                                       deferred_message_dispatch,
 398                                       msg_state);
 399                 if (evt == NULL) {
 400                         DEBUG(0, ("event_add_timed failed\n"));
 401                         TALLOC_FREE(msg_state);
 402                         TALLOC_FREE(hdr);
 403                         goto next_pkt;
 404                 }
 405
 406                 goto next_pkt;
 407         }
 408
 409         if (hdr->reqid != reqid) {
 410                 /* we got the wrong reply */
 411                 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
 412                          "been %u\n", hdr->reqid, reqid));
 413                 TALLOC_FREE(hdr);
 414                 goto again;
 415         }
 416
 417         *((void **)result) = talloc_move(mem_ctx, &hdr);
 418
 419         return NT_STATUS_OK;
 420 }
 421
 422 /*
 423  * Get us a ctdbd connection
 424  */
 425
 426 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
 427                                struct ctdbd_connection **pconn)
 428 {
 429         struct ctdbd_connection *conn;
 430         NTSTATUS status;
 431
 432         if (!(conn = TALLOC_ZERO_P(mem_ctx, struct ctdbd_connection))) {
 433                 DEBUG(0, ("talloc failed\n"));
 434                 return NT_STATUS_NO_MEMORY;
 435         }
 436
 437         status = ctdbd_connect(conn, &conn->pkt);
 438
 439         if (!NT_STATUS_IS_OK(status)) {
 440                 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
 441                 goto fail;
 442         }
 443
 444         status = get_cluster_vnn(conn, &conn->our_vnn);
 445
 446         if (!NT_STATUS_IS_OK(status)) {
 447                 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
 448                 goto fail;
 449         }
 450
 451         generate_random_buffer((unsigned char *)&conn->rand_srvid,
 452                                sizeof(conn->rand_srvid));
 453
 454         status = register_with_ctdbd(conn, conn->rand_srvid);
 455
 456         if (!NT_STATUS_IS_OK(status)) {
 457                 DEBUG(5, ("Could not register random srvid: %s\n",
 458                           nt_errstr(status)));
 459                 goto fail;
 460         }
 461
 462         *pconn = conn;
 463         return NT_STATUS_OK;
 464
 465  fail:
 466         TALLOC_FREE(conn);
 467         return status;
 468 }
 469
 470 /*
 471  * Get us a ctdbd connection and register us as a process
 472  */
 473
 474 NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
 475                                     struct ctdbd_connection **pconn)
 476 {
 477         struct ctdbd_connection *conn;
 478         NTSTATUS status;
 479
 480         status = ctdbd_init_connection(mem_ctx, &conn);
 481
 482         if (!NT_STATUS_IS_OK(status)) {
 483                 return status;
 484         }
 485
 486         status = register_with_ctdbd(conn, (uint64_t)sys_getpid());
 487         if (!NT_STATUS_IS_OK(status)) {
 488                 goto fail;
 489         }
 490
 491         status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
 492         if (!NT_STATUS_IS_OK(status)) {
 493                 goto fail;
 494         }
 495
 496         *pconn = conn;
 497         return NT_STATUS_OK;
 498
 499  fail:
 500         TALLOC_FREE(conn);
 501         return status;
 502 }
 503
 504 /*
 505  * Packet handler to receive and handle a ctdb message
 506  */
 507 static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
 508                                     void *private_data)
 509 {
 510         struct ctdbd_connection *conn = talloc_get_type_abort(
 511                 private_data, struct ctdbd_connection);
 512         struct ctdb_req_message *msg;
 513         struct messaging_rec *msg_rec;
 514
 515         msg = (struct ctdb_req_message *)buf;
 516
 517         if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
 518                 DEBUG(0, ("Received async msg of type %u, discarding\n",
 519                           msg->hdr.operation));
 520                 TALLOC_FREE(buf);
 521                 return NT_STATUS_INVALID_PARAMETER;
 522         }
 523
 524         if ((conn->release_ip_handler != NULL)
 525             && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
 526                 /* must be dispatched immediately */
 527                 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
 528                 conn->release_ip_handler((const char *)msg->data,
 529                                          conn->release_ip_priv);
 530                 TALLOC_FREE(buf);
 531                 return NT_STATUS_OK;
 532         }
 533
 534         SMB_ASSERT(conn->msg_ctx != NULL);
 535
 536         if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
 537                 DEBUG(0,("Got cluster reconfigure message\n"));
 538                 /*
 539                  * when the cluster is reconfigured, we need to clean the brl
 540                  * database
 541                  */
 542                 messaging_send(conn->msg_ctx, procid_self(),
 543                                MSG_SMB_BRL_VALIDATE, &data_blob_null);
 544
 545                 TALLOC_FREE(buf);
 546                 return NT_STATUS_OK;
 547         }
 548
 549         /* only messages to our pid or the broadcast are valid here */
 550         if (msg->srvid != sys_getpid() && msg->srvid != MSG_SRVID_SAMBA) {
 551                 DEBUG(0,("Got unexpected message with srvid=%llu\n",
 552                          (unsigned long long)msg->srvid));
 553                 TALLOC_FREE(buf);
 554                 return NT_STATUS_OK;
 555         }
 556
 557         if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
 558                 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
 559                 TALLOC_FREE(buf);
 560                 return NT_STATUS_NO_MEMORY;
 561         }
 562
 563         messaging_dispatch_rec(conn->msg_ctx, msg_rec);
 564
 565         TALLOC_FREE(msg_rec);
 566         TALLOC_FREE(buf);
 567         return NT_STATUS_OK;
 568 }
 569
 570 /*
 571  * The ctdbd socket is readable asynchronuously
 572  */
 573
 574 static void ctdbd_socket_handler(struct event_context *event_ctx,
 575                                  struct fd_event *event,
 576                                  uint16 flags,
 577                                  void *private_data)
 578 {
 579         struct ctdbd_connection *conn = talloc_get_type_abort(
 580                 private_data, struct ctdbd_connection);
 581
 582         NTSTATUS status;
 583
 584         status = packet_fd_read(conn->pkt);
 585
 586         if (!NT_STATUS_IS_OK(status)) {
 587                 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
 588                 cluster_fatal("ctdbd died\n");
 589         }
 590
 591         while (packet_handler(conn->pkt, ctdb_req_complete,
 592                               ctdb_handle_message, conn, &status)) {
 593                 if (!NT_STATUS_IS_OK(status)) {
 594                         DEBUG(10, ("could not handle incoming message: %s\n",
 595                                    nt_errstr(status)));
 596                 }
 597         }
 598 }
 599
 600 /*
 601  * Prepare a ctdbd connection to receive messages
 602  */
 603
 604 NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
 605                                 struct messaging_context *msg_ctx)
 606 {
 607         SMB_ASSERT(conn->msg_ctx == NULL);
 608         SMB_ASSERT(conn->fde == NULL);
 609
 610         if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
 611                                        packet_get_fd(conn->pkt),
 612                                        EVENT_FD_READ,
 613                                        ctdbd_socket_handler,
 614                                        conn))) {
 615                 DEBUG(0, ("event_add_fd failed\n"));
 616                 return NT_STATUS_NO_MEMORY;
 617         }
 618
 619         conn->msg_ctx = msg_ctx;
 620
 621         return NT_STATUS_OK;
 622 }
 623
 624 /*
 625  * Send a messaging message across a ctdbd
 626  */
 627
 628 NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
 629                               uint32 dst_vnn, uint64 dst_srvid,
 630                               struct messaging_rec *msg)
 631 {
 632         struct ctdb_req_message r;
 633         TALLOC_CTX *mem_ctx;
 634         DATA_BLOB blob;
 635         NTSTATUS status;
 636         enum ndr_err_code ndr_err;
 637
 638         if (!(mem_ctx = talloc_init("ctdbd_messaging_send"))) {
 639                 DEBUG(0, ("talloc failed\n"));
 640                 return NT_STATUS_NO_MEMORY;
 641         }
 642
 643         ndr_err = ndr_push_struct_blob(
 644                 &blob, mem_ctx, NULL, msg,
 645                 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
 646
 647         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 648                 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
 649                           ndr_errstr(ndr_err)));
 650                 status = ndr_map_error2ntstatus(ndr_err);
 651                 goto fail;
 652         }
 653
 654         r.hdr.length = offsetof(struct ctdb_req_message, data) + blob.length;
 655         r.hdr.ctdb_magic = CTDB_MAGIC;
 656         r.hdr.ctdb_version = CTDB_VERSION;
 657         r.hdr.generation = 1;
 658         r.hdr.operation  = CTDB_REQ_MESSAGE;
 659         r.hdr.destnode   = dst_vnn;
 660         r.hdr.srcnode    = conn->our_vnn;
 661         r.hdr.reqid      = 0;
 662         r.srvid          = dst_srvid;
 663         r.datalen        = blob.length;
 664
 665         DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
 666         ctdb_packet_dump(&r.hdr);
 667
 668         status = packet_send(
 669                 conn->pkt, 2,
 670                 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
 671                 blob);
 672
 673         if (!NT_STATUS_IS_OK(status)) {
 674                 DEBUG(0, ("packet_send failed: %s\n", nt_errstr(status)));
 675                 goto fail;
 676         }
 677
 678         status = packet_flush(conn->pkt);
 679
 680         if (!NT_STATUS_IS_OK(status)) {
 681                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 682                 cluster_fatal("cluster dispatch daemon msg write error\n");
 683         }
 684
 685         status = NT_STATUS_OK;
 686  fail:
 687         TALLOC_FREE(mem_ctx);
 688         return status;
 689 }
 690
 691 /*
 692  * send/recv a generic ctdb control message
 693  */
 694 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
 695                               uint32_t vnn, uint32 opcode,
 696                               uint64_t srvid, uint32_t flags,
 697                               TDB_DATA data,
 698                               TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
 699                               int *cstatus)
 700 {
 701         struct ctdb_req_control req;
 702         struct ctdb_reply_control *reply = NULL;
 703         struct ctdbd_connection *new_conn = NULL;
 704         NTSTATUS status;
 705
 706         /* the samba3 ctdb code can't handle NOREPLY yet */
 707         flags &= ~CTDB_CTRL_FLAG_NOREPLY;
 708
 709         if (conn == NULL) {
 710                 status = ctdbd_init_connection(NULL, &new_conn);
 711
 712                 if (!NT_STATUS_IS_OK(status)) {
 713                         DEBUG(10, ("Could not init temp connection: %s\n",
 714                                    nt_errstr(status)));
 715                         goto fail;
 716                 }
 717
 718                 conn = new_conn;
 719         }
 720
 721         ZERO_STRUCT(req);
 722         req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
 723         req.hdr.ctdb_magic   = CTDB_MAGIC;
 724         req.hdr.ctdb_version = CTDB_VERSION;
 725         req.hdr.operation    = CTDB_REQ_CONTROL;
 726         req.hdr.reqid        = ++conn->reqid;
 727         req.hdr.destnode     = vnn;
 728         req.opcode           = opcode;
 729         req.srvid            = srvid;
 730         req.datalen          = data.dsize;
 731
 732         DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
 733         ctdb_packet_dump(&req.hdr);
 734
 735         status = packet_send(
 736                 conn->pkt, 2,
 737                 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
 738                 data_blob_const(data.dptr, data.dsize));
 739
 740         if (!NT_STATUS_IS_OK(status)) {
 741                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 742                 goto fail;
 743         }
 744
 745         status = packet_flush(conn->pkt);
 746
 747         if (!NT_STATUS_IS_OK(status)) {
 748                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 749                 cluster_fatal("cluster dispatch daemon control write error\n");
 750         }
 751
 752         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 753                 TALLOC_FREE(new_conn);
 754                 return NT_STATUS_OK;
 755         }
 756
 757         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 758
 759         if (!NT_STATUS_IS_OK(status)) {
 760                 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 761                 goto fail;
 762         }
 763
 764         if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
 765                 DEBUG(0, ("received invalid reply\n"));
 766                 goto fail;
 767         }
 768
 769         if (outdata) {
 770                 if (!(outdata->dptr = (uint8 *)talloc_memdup(
 771                               mem_ctx, reply->data, reply->datalen))) {
 772                         TALLOC_FREE(reply);
 773                         return NT_STATUS_NO_MEMORY;
 774                 }
 775                 outdata->dsize = reply->datalen;
 776         }
 777         if (cstatus) {
 778                 (*cstatus) = reply->status;
 779         }
 780
 781         status = NT_STATUS_OK;
 782
 783  fail:
 784         TALLOC_FREE(new_conn);
 785         TALLOC_FREE(reply);
 786         return status;
 787 }
 788
 789 /*
 790  * see if a remote process exists
 791  */
 792 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
 793 {
 794         NTSTATUS status;
 795         TDB_DATA data;
 796         int32_t cstatus;
 797
 798         data.dptr = (uint8_t*)&pid;
 799         data.dsize = sizeof(pid);
 800
 801         status = ctdbd_control(conn, vnn, CTDB_CONTROL_PROCESS_EXISTS, 0, 0,
 802                                data, NULL, NULL, &cstatus);
 803         if (!NT_STATUS_IS_OK(status)) {
 804                 DEBUG(0, (__location__ " ctdb_control for process_exists "
 805                           "failed\n"));
 806                 return False;
 807         }
 808
 809         return cstatus == 0;
 810 }
 811
 812 /*
 813  * Get a db path
 814  */
 815 char *ctdbd_dbpath(struct ctdbd_connection *conn,
 816                    TALLOC_CTX *mem_ctx, uint32_t db_id)
 817 {
 818         NTSTATUS status;
 819         TDB_DATA data;
 820         int32_t cstatus;
 821
 822         data.dptr = (uint8_t*)&db_id;
 823         data.dsize = sizeof(db_id);
 824
 825         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 826                                CTDB_CONTROL_GETDBPATH, 0, 0, data,
 827                                mem_ctx, &data, &cstatus);
 828         if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
 829                 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
 830                 return NULL;
 831         }
 832
 833         return (char *)data.dptr;
 834 }
 835
 836 /*
 837  * attach to a ctdb database
 838  */
 839 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
 840                          const char *name, uint32_t *db_id, int tdb_flags)
 841 {
 842         NTSTATUS status;
 843         TDB_DATA data;
 844         int32_t cstatus;
 845         bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
 846
 847         data.dptr = (uint8_t*)name;
 848         data.dsize = strlen(name)+1;
 849
 850         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 851                                persistent
 852                                ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
 853                                : CTDB_CONTROL_DB_ATTACH,
 854                                0, 0, data, NULL, &data, &cstatus);
 855         if (!NT_STATUS_IS_OK(status)) {
 856                 DEBUG(0, (__location__ " ctdb_control for db_attach "
 857                           "failed: %s\n", nt_errstr(status)));
 858                 return status;
 859         }
 860
 861         if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
 862                 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
 863                 return NT_STATUS_INTERNAL_ERROR;
 864         }
 865
 866         *db_id = *(uint32_t *)data.dptr;
 867         talloc_free(data.dptr);
 868
 869         if (!(tdb_flags & TDB_SEQNUM)) {
 870                 return NT_STATUS_OK;
 871         }
 872
 873         data.dptr = (uint8_t *)db_id;
 874         data.dsize = sizeof(*db_id);
 875
 876         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 877                                CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
 878                                NULL, NULL, &cstatus);
 879         if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
 880                 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
 881                          "failed\n"));
 882                 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
 883                         status;
 884         }
 885
 886         return NT_STATUS_OK;
 887 }
 888
 889 /*
 890  * force the migration of a record to this node
 891  */
 892 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
 893                        TDB_DATA key)
 894 {
 895         struct ctdb_req_call req;
 896         struct ctdb_reply_call *reply;
 897         NTSTATUS status;
 898
 899         ZERO_STRUCT(req);
 900
 901         req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
 902         req.hdr.ctdb_magic   = CTDB_MAGIC;
 903         req.hdr.ctdb_version = CTDB_VERSION;
 904         req.hdr.operation    = CTDB_REQ_CALL;
 905         req.hdr.reqid        = ++conn->reqid;
 906         req.flags            = CTDB_IMMEDIATE_MIGRATION;
 907         req.callid           = CTDB_NULL_FUNC;
 908         req.db_id            = db_id;
 909         req.keylen           = key.dsize;
 910
 911         DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
 912         ctdb_packet_dump(&req.hdr);
 913
 914         status = packet_send(
 915                 conn->pkt, 2,
 916                 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
 917                 data_blob_const(key.dptr, key.dsize));
 918
 919         if (!NT_STATUS_IS_OK(status)) {
 920                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 921                 return status;
 922         }
 923
 924         status = packet_flush(conn->pkt);
 925
 926         if (!NT_STATUS_IS_OK(status)) {
 927                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 928                 cluster_fatal("cluster dispatch daemon control write error\n");
 929         }
 930
 931         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 932
 933         if (!NT_STATUS_IS_OK(status)) {
 934                 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 935                 goto fail;
 936         }
 937
 938         if (reply->hdr.operation != CTDB_REPLY_CALL) {
 939                 DEBUG(0, ("received invalid reply\n"));
 940                 status = NT_STATUS_INTERNAL_ERROR;
 941                 goto fail;
 942         }
 943
 944         status = NT_STATUS_OK;
 945  fail:
 946
 947         TALLOC_FREE(reply);
 948         return status;
 949 }
 950
 951 /*
 952  * remotely fetch a record without locking it or forcing a migration
 953  */
 954 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
 955                      TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
 956 {
 957         struct ctdb_req_call req;
 958         struct ctdb_reply_call *reply;
 959         NTSTATUS status;
 960
 961         ZERO_STRUCT(req);
 962
 963         req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
 964         req.hdr.ctdb_magic   = CTDB_MAGIC;
 965         req.hdr.ctdb_version = CTDB_VERSION;
 966         req.hdr.operation    = CTDB_REQ_CALL;
 967         req.hdr.reqid        = ++conn->reqid;
 968         req.flags            = 0;
 969         req.callid           = CTDB_FETCH_FUNC;
 970         req.db_id            = db_id;
 971         req.keylen           = key.dsize;
 972
 973         status = packet_send(
 974                 conn->pkt, 2,
 975                 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
 976                 data_blob_const(key.dptr, key.dsize));
 977
 978         if (!NT_STATUS_IS_OK(status)) {
 979                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 980                 return status;
 981         }
 982
 983         status = packet_flush(conn->pkt);
 984
 985         if (!NT_STATUS_IS_OK(status)) {
 986                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 987                 cluster_fatal("cluster dispatch daemon control write error\n");
 988         }
 989
 990         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 991
 992         if (!NT_STATUS_IS_OK(status)) {
 993                 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 994                 goto fail;
 995         }
 996
 997         if (reply->hdr.operation != CTDB_REPLY_CALL) {
 998                 DEBUG(0, ("received invalid reply\n"));
 999                 status = NT_STATUS_INTERNAL_ERROR;
1000                 goto fail;
1001         }
1002
1003         data->dsize = reply->datalen;
1004         if (data->dsize == 0) {
1005                 data->dptr = NULL;
1006                 goto done;
1007         }
1008
1009         data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1010                                             reply->datalen);
1011         if (data->dptr == NULL) {
1012                 DEBUG(0, ("talloc failed\n"));
1013                 status = NT_STATUS_NO_MEMORY;
1014                 goto fail;
1015         }
1016
1017  done:
1018         status = NT_STATUS_OK;
1019  fail:
1020         TALLOC_FREE(reply);
1021         return status;
1022 }
1023
1024 struct ctdbd_traverse_state {
1025         void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1026         void *private_data;
1027 };
1028
1029 /*
1030  * Handle a traverse record coming in on the ctdbd connection
1031  */
1032
1033 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1034                                       void *private_data)
1035 {
1036         struct ctdbd_traverse_state *state =
1037                 (struct ctdbd_traverse_state *)private_data;
1038
1039         struct ctdb_req_message *m;
1040         struct ctdb_rec_data *d;
1041         TDB_DATA key, data;
1042
1043         m = (struct ctdb_req_message *)buf;
1044
1045         if (length < sizeof(*m) || m->hdr.length != length) {
1046                 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1047                 TALLOC_FREE(buf);
1048                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1049         }
1050
1051         d = (struct ctdb_rec_data *)&m->data[0];
1052         if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1053                 DEBUG(0, ("Got invalid traverse data of length %d\n",
1054                           (int)m->datalen));
1055                 TALLOC_FREE(buf);
1056                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1057         }
1058
1059         key.dsize = d->keylen;
1060         key.dptr  = &d->data[0];
1061         data.dsize = d->datalen;
1062         data.dptr = &d->data[d->keylen];
1063
1064         if (key.dsize == 0 && data.dsize == 0) {
1065                 /* end of traverse */
1066                 return NT_STATUS_END_OF_FILE;
1067         }
1068
1069         if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1070                 DEBUG(0, ("Got invalid ltdb header length %d\n",
1071                           (int)data.dsize));
1072                 TALLOC_FREE(buf);
1073                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1074         }
1075         data.dsize -= sizeof(struct ctdb_ltdb_header);
1076         data.dptr += sizeof(struct ctdb_ltdb_header);
1077
1078         if (state->fn) {
1079                 state->fn(key, data, state->private_data);
1080         }
1081
1082         TALLOC_FREE(buf);
1083         return NT_STATUS_OK;
1084 }
1085
1086 /*
1087   Traverse a ctdb database. This uses a kind-of hackish way to open a second
1088   connection to ctdbd to avoid the hairy recursive and async problems with
1089   everything in-line.
1090 */
1091
1092 NTSTATUS ctdbd_traverse(uint32 db_id,
1093                         void (*fn)(TDB_DATA key, TDB_DATA data,
1094                                    void *private_data),
1095                         void *private_data)
1096 {
1097         struct ctdbd_connection *conn;
1098         NTSTATUS status;
1099
1100         TDB_DATA data;
1101         struct ctdb_traverse_start t;
1102         int cstatus;
1103         struct ctdbd_traverse_state state;
1104
1105         status = ctdbd_init_connection(NULL, &conn);
1106         if (!NT_STATUS_IS_OK(status)) {
1107                 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1108                           nt_errstr(status)));
1109                 return status;
1110         }
1111
1112         t.db_id = db_id;
1113         t.srvid = conn->rand_srvid;
1114         t.reqid = ++conn->reqid;
1115
1116         data.dptr = (uint8_t *)&t;
1117         data.dsize = sizeof(t);
1118
1119         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1120                                CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1121                                data, NULL, NULL, &cstatus);
1122
1123         if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1124
1125                 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1126                          cstatus));
1127
1128                 if (NT_STATUS_IS_OK(status)) {
1129                         /*
1130                          * We need a mapping here
1131                          */
1132                         status = NT_STATUS_UNSUCCESSFUL;
1133                 }
1134                 goto done;
1135         }
1136
1137         state.fn = fn;
1138         state.private_data = private_data;
1139
1140         while (True) {
1141
1142                 status = NT_STATUS_OK;
1143
1144                 if (packet_handler(conn->pkt, ctdb_req_complete,
1145                                    ctdb_traverse_handler, &state, &status)) {
1146
1147                         if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1148                                 status = NT_STATUS_OK;
1149                                 break;
1150                         }
1151
1152                         /*
1153                          * There might be more in the queue
1154                          */
1155                         continue;
1156                 }
1157
1158                 if (!NT_STATUS_IS_OK(status)) {
1159                         break;
1160                 }
1161
1162                 status = ctdb_packet_fd_read_sync(conn->pkt);
1163
1164                 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1165                         /*
1166                          * There might be more in the queue
1167                          */
1168                         continue;
1169                 }
1170
1171                 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1172                         status = NT_STATUS_OK;
1173                         break;
1174                 }
1175
1176                 if (!NT_STATUS_IS_OK(status)) {
1177                         DEBUG(0, ("packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1178                         cluster_fatal("ctdbd died\n");
1179                 }
1180         }
1181
1182  done:
1183         TALLOC_FREE(conn);
1184         return status;
1185 }
1186
1187 /*
1188    This is used to canonicalize a ctdb_sock_addr structure.
1189 */
1190 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1191                                       struct sockaddr_storage *out)
1192 {
1193         memcpy(out, in, sizeof (*out));
1194
1195 #ifdef HAVE_IPV6
1196         if (in->ss_family == AF_INET6) {
1197                 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1198                 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1199                 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1200                 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1201                         memset(out, 0, sizeof(*out));
1202 #ifdef HAVE_SOCK_SIN_LEN
1203                         out4->sin_len = sizeof(*out);
1204 #endif
1205                         out4->sin_family = AF_INET;
1206                         out4->sin_port   = in6->sin6_port;
1207                         memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1208                 }
1209         }
1210 #endif
1211 }
1212
1213 /*
1214  * Register us as a server for a particular tcp connection
1215  */
1216
1217 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1218                             const struct sockaddr_storage *_server,
1219                             const struct sockaddr_storage *_client,
1220                             void (*release_ip_handler)(const char *ip_addr,
1221                                                        void *private_data),
1222                             void *private_data)
1223 {
1224         /*
1225          * we still use ctdb_control_tcp for ipv4
1226          * because we want to work against older ctdb
1227          * versions at runtime
1228          */
1229         struct ctdb_control_tcp p4;
1230 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1231         struct ctdb_control_tcp_addr p;
1232 #endif
1233         TDB_DATA data;
1234         NTSTATUS status;
1235         struct sockaddr_storage client;
1236         struct sockaddr_storage server;
1237
1238         /*
1239          * Only one connection so far
1240          */
1241         SMB_ASSERT(conn->release_ip_handler == NULL);
1242
1243         smbd_ctdb_canonicalize_ip(_client, &client);
1244         smbd_ctdb_canonicalize_ip(_server, &server);
1245
1246         switch (client.ss_family) {
1247         case AF_INET:
1248                 p4.dest = *(struct sockaddr_in *)&server;
1249                 p4.src = *(struct sockaddr_in *)&client;
1250                 data.dptr = (uint8_t *)&p4;
1251                 data.dsize = sizeof(p4);
1252                 break;
1253 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1254         case AF_INET6:
1255                 p.dest.ip6 = *(struct sockaddr_in6 *)&server;
1256                 p.src.ip6 = *(struct sockaddr_in6 *)&client;
1257                 data.dptr = (uint8_t *)&p;
1258                 data.dsize = sizeof(p);
1259                 break;
1260 #endif
1261         default:
1262                 return NT_STATUS_INTERNAL_ERROR;
1263         }
1264
1265         conn->release_ip_handler = release_ip_handler;
1266
1267         /*
1268          * We want to be told about IP releases
1269          */
1270
1271         status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1272         if (!NT_STATUS_IS_OK(status)) {
1273                 return status;
1274         }
1275
1276         /*
1277          * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1278          * can send an extra ack to trigger a reset for our client, so it
1279          * immediately reconnects
1280          */
1281         return ctdbd_control(conn, CTDB_CURRENT_NODE,
1282                              CTDB_CONTROL_TCP_CLIENT, 0,
1283                              CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1284 }
1285
1286 /*
1287  * We want to handle reconfigure events
1288  */
1289 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1290 {
1291         return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1292 }
1293
1294 /*
1295   call a control on the local node
1296  */
1297 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1298                              uint64_t srvid, uint32_t flags, TDB_DATA data,
1299                              TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1300                              int *cstatus)
1301 {
1302         return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1303 }
1304
1305 #else
1306
1307 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
1308                                struct ctdbd_connection **pconn)
1309 {
1310         return NT_STATUS_NOT_IMPLEMENTED;
1311 }
1312
1313 #endif