root/source3/lib/ctdbd_conn.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. cluster_fatal
  2. ctdb_packet_dump
  3. register_with_ctdbd
  4. get_cluster_vnn
  5. ctdbd_vnn
  6. ctdbd_connect
  7. ctdb_req_complete
  8. deferred_message_dispatch
  9. ctdb_req_pull
  10. ctdb_pull_messaging_rec
  11. ctdb_read_req
  12. ctdbd_init_connection
  13. ctdbd_messaging_connection
  14. ctdb_handle_message
  15. ctdbd_socket_handler
  16. ctdbd_register_msg_ctx
  17. ctdbd_messaging_send
  18. ctdbd_control
  19. ctdbd_process_exists
  20. ctdbd_dbpath
  21. ctdbd_db_attach
  22. ctdbd_migrate
  23. ctdbd_fetch
  24. ctdb_traverse_handler
  25. ctdbd_traverse
  26. smbd_ctdb_canonicalize_ip
  27. ctdbd_register_ips
  28. ctdbd_register_reconfigure
  29. ctdbd_control_local
  30. ctdbd_init_connection

   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)
     /* [<][>][^][v][top][bottom][index][help] */
  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)
     /* [<][>][^][v][top][bottom][index][help] */
  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,
     /* [<][>][^][v][top][bottom][index][help] */
  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)
     /* [<][>][^][v][top][bottom][index][help] */
  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)
     /* [<][>][^][v][top][bottom][index][help] */
 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,
     /* [<][>][^][v][top][bottom][index][help] */
 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,
     /* [<][>][^][v][top][bottom][index][help] */
 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,
     /* [<][>][^][v][top][bottom][index][help] */
 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,
     /* [<][>][^][v][top][bottom][index][help] */
 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,
     /* [<][>][^][v][top][bottom][index][help] */
 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 /*
 279  * Read a full ctdbd request. If we have a messaging context, defer incoming
 280  * messages that might come in between.
 281  */
 282 
 283 static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
     /* [<][>][^][v][top][bottom][index][help] */
 284                               TALLOC_CTX *mem_ctx, void *result)
 285 {
 286         struct ctdb_req_header *hdr;
 287         struct req_pull_state state;
 288         NTSTATUS status;
 289 
 290  again:
 291 
 292         status = packet_fd_read_sync(conn->pkt);
 293 
 294         if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
 295                 /* EAGAIN */
 296                 goto again;
 297         } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
 298                 /* EAGAIN */
 299                 goto again;
 300         }
 301 
 302         if (!NT_STATUS_IS_OK(status)) {
 303                 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
 304                 cluster_fatal("ctdbd died\n");
 305         }
 306 
 307  next_pkt:
 308 
 309         ZERO_STRUCT(state);
 310         state.mem_ctx = mem_ctx;
 311 
 312         if (!packet_handler(conn->pkt, ctdb_req_complete, ctdb_req_pull,
 313                             &state, &status)) {
 314                 /*
 315                  * Not enough data
 316                  */
 317                 DEBUG(10, ("not enough data from ctdb socket, retrying\n"));
 318                 goto again;
 319         }
 320 
 321         if (!NT_STATUS_IS_OK(status)) {
 322                 DEBUG(0, ("Could not read packet: %s\n", nt_errstr(status)));
 323                 cluster_fatal("ctdbd died\n");
 324         }
 325 
 326         hdr = (struct ctdb_req_header *)state.req.data;
 327 
 328         DEBUG(10, ("Received ctdb packet\n"));
 329         ctdb_packet_dump(hdr);
 330 
 331         if (hdr->operation == CTDB_REQ_MESSAGE) {
 332                 struct timed_event *evt;
 333                 struct deferred_msg_state *msg_state;
 334                 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
 335 
 336                 if (conn->msg_ctx == NULL) {
 337                         DEBUG(1, ("Got a message without having a msg ctx, "
 338                                   "dropping msg %llu\n",
 339                                   (long long unsigned)msg->srvid));
 340                         goto next_pkt;
 341                 }
 342                 
 343                 if ((conn->release_ip_handler != NULL)
 344                     && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
 345                         /* must be dispatched immediately */
 346                         DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
 347                         conn->release_ip_handler((const char *)msg->data,
 348                                                  conn->release_ip_priv);
 349                         TALLOC_FREE(hdr);
 350                         goto next_pkt;
 351                 }
 352 
 353                 if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
 354                         DEBUG(0,("Got cluster reconfigure message in ctdb_read_req\n"));
 355                         messaging_send(conn->msg_ctx, procid_self(),
 356                                        MSG_SMB_BRL_VALIDATE, &data_blob_null);
 357                         TALLOC_FREE(hdr);
 358                         goto next_pkt;
 359                 }
 360 
 361                 if (!(msg_state = TALLOC_P(NULL, struct deferred_msg_state))) {
 362                         DEBUG(0, ("talloc failed\n"));
 363                         TALLOC_FREE(hdr);
 364                         goto next_pkt;
 365                 }
 366 
 367                 if (!(msg_state->rec = ctdb_pull_messaging_rec(
 368                               msg_state, state.req.length, msg))) {
 369                         DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
 370                         TALLOC_FREE(msg_state);
 371                         TALLOC_FREE(hdr);
 372                         goto next_pkt;
 373                 }
 374 
 375                 TALLOC_FREE(hdr);
 376 
 377                 msg_state->msg_ctx = conn->msg_ctx;
 378                 
 379                 /*
 380                  * We're waiting for a call reply, but an async message has
 381                  * crossed. Defer dispatching to the toplevel event loop.
 382                  */
 383                 evt = event_add_timed(conn->msg_ctx->event_ctx,
 384                                       conn->msg_ctx->event_ctx,
 385                                       timeval_zero(),
 386                                       deferred_message_dispatch,
 387                                       msg_state);
 388                 if (evt == NULL) {
 389                         DEBUG(0, ("event_add_timed failed\n"));
 390                         TALLOC_FREE(msg_state);
 391                         TALLOC_FREE(hdr);
 392                         goto next_pkt;
 393                 }
 394                 
 395                 goto next_pkt;
 396         }
 397 
 398         if (hdr->reqid != reqid) {
 399                 /* we got the wrong reply */
 400                 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
 401                          "been %u\n", hdr->reqid, reqid));
 402                 TALLOC_FREE(hdr);
 403                 goto again;
 404         }
 405 
 406         *((void **)result) = talloc_move(mem_ctx, &hdr);
 407 
 408         return NT_STATUS_OK;
 409 }
 410 
 411 /*
 412  * Get us a ctdbd connection
 413  */
 414 
 415 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 416                                struct ctdbd_connection **pconn)
 417 {
 418         struct ctdbd_connection *conn;
 419         NTSTATUS status;
 420 
 421         if (!(conn = TALLOC_ZERO_P(mem_ctx, struct ctdbd_connection))) {
 422                 DEBUG(0, ("talloc failed\n"));
 423                 return NT_STATUS_NO_MEMORY;
 424         }
 425 
 426         status = ctdbd_connect(conn, &conn->pkt);
 427 
 428         if (!NT_STATUS_IS_OK(status)) {
 429                 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
 430                 goto fail;
 431         }
 432 
 433         status = get_cluster_vnn(conn, &conn->our_vnn);
 434 
 435         if (!NT_STATUS_IS_OK(status)) {
 436                 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
 437                 goto fail;
 438         }
 439 
 440         generate_random_buffer((unsigned char *)&conn->rand_srvid,
 441                                sizeof(conn->rand_srvid));
 442 
 443         status = register_with_ctdbd(conn, conn->rand_srvid);
 444 
 445         if (!NT_STATUS_IS_OK(status)) {
 446                 DEBUG(5, ("Could not register random srvid: %s\n",
 447                           nt_errstr(status)));
 448                 goto fail;
 449         }
 450 
 451         *pconn = conn;
 452         return NT_STATUS_OK;
 453 
 454  fail:
 455         TALLOC_FREE(conn);
 456         return status;
 457 }
 458 
 459 /*
 460  * Get us a ctdbd connection and register us as a process
 461  */
 462 
 463 NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 464                                     struct ctdbd_connection **pconn)
 465 {
 466         struct ctdbd_connection *conn;
 467         NTSTATUS status;
 468 
 469         status = ctdbd_init_connection(mem_ctx, &conn);
 470 
 471         if (!NT_STATUS_IS_OK(status)) {
 472                 return status;
 473         }
 474 
 475         status = register_with_ctdbd(conn, (uint64_t)sys_getpid());
 476         if (!NT_STATUS_IS_OK(status)) {
 477                 goto fail;
 478         }
 479 
 480         status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
 481         if (!NT_STATUS_IS_OK(status)) {
 482                 goto fail;
 483         }
 484 
 485         *pconn = conn;
 486         return NT_STATUS_OK;
 487 
 488  fail:
 489         TALLOC_FREE(conn);
 490         return status;
 491 }
 492 
 493 /*
 494  * Packet handler to receive and handle a ctdb message
 495  */
 496 static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
     /* [<][>][^][v][top][bottom][index][help] */
 497                                     void *private_data)
 498 {
 499         struct ctdbd_connection *conn = talloc_get_type_abort(
 500                 private_data, struct ctdbd_connection);
 501         struct ctdb_req_message *msg;
 502         struct messaging_rec *msg_rec;
 503 
 504         msg = (struct ctdb_req_message *)buf;
 505 
 506         if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
 507                 DEBUG(0, ("Received async msg of type %u, discarding\n",
 508                           msg->hdr.operation));
 509                 TALLOC_FREE(buf);
 510                 return NT_STATUS_INVALID_PARAMETER;
 511         }
 512 
 513         if ((conn->release_ip_handler != NULL)
 514             && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
 515                 /* must be dispatched immediately */
 516                 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
 517                 conn->release_ip_handler((const char *)msg->data,
 518                                          conn->release_ip_priv);
 519                 TALLOC_FREE(buf);
 520                 return NT_STATUS_OK;
 521         }
 522 
 523         SMB_ASSERT(conn->msg_ctx != NULL);
 524 
 525         if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
 526                 DEBUG(0,("Got cluster reconfigure message\n"));
 527                 /*
 528                  * when the cluster is reconfigured, we need to clean the brl
 529                  * database
 530                  */
 531                 messaging_send(conn->msg_ctx, procid_self(),
 532                                MSG_SMB_BRL_VALIDATE, &data_blob_null);
 533 
 534                 /*
 535                  * it's possible that we have just rejoined the cluster after
 536                  * an outage. In that case our pending locks could have been
 537                  * removed from the lockdb, so retry them once more
 538                  */
 539                 message_send_all(conn->msg_ctx, MSG_SMB_UNLOCK, NULL, 0, NULL);
 540 
 541                 TALLOC_FREE(buf);
 542 
 543                 return NT_STATUS_OK;
 544                 
 545         }
 546 
 547         /* only messages to our pid or the broadcast are valid here */
 548         if (msg->srvid != sys_getpid() && msg->srvid != MSG_SRVID_SAMBA) {
 549                 DEBUG(0,("Got unexpected message with srvid=%llu\n", 
 550                          (unsigned long long)msg->srvid));
 551                 TALLOC_FREE(buf);
 552                 return NT_STATUS_OK;
 553         }
 554 
 555         if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
 556                 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
 557                 TALLOC_FREE(buf);
 558                 return NT_STATUS_NO_MEMORY;
 559         }
 560 
 561         messaging_dispatch_rec(conn->msg_ctx, msg_rec);
 562 
 563         TALLOC_FREE(msg_rec);
 564         TALLOC_FREE(buf);
 565         return NT_STATUS_OK;
 566 }
 567 
 568 /*
 569  * The ctdbd socket is readable asynchronuously
 570  */
 571 
 572 static void ctdbd_socket_handler(struct event_context *event_ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 573                                  struct fd_event *event,
 574                                  uint16 flags,
 575                                  void *private_data)
 576 {
 577         struct ctdbd_connection *conn = talloc_get_type_abort(
 578                 private_data, struct ctdbd_connection);
 579 
 580         NTSTATUS status;
 581 
 582         status = packet_fd_read(conn->pkt);
 583 
 584         if (!NT_STATUS_IS_OK(status)) {
 585                 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
 586                 cluster_fatal("ctdbd died\n");
 587         }
 588 
 589         while (packet_handler(conn->pkt, ctdb_req_complete,
 590                               ctdb_handle_message, conn, &status)) {
 591                 if (!NT_STATUS_IS_OK(status)) {
 592                         DEBUG(10, ("could not handle incoming message: %s\n",
 593                                    nt_errstr(status)));
 594                 }
 595         }
 596 }
 597 
 598 /*
 599  * Prepare a ctdbd connection to receive messages
 600  */
 601 
 602 NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
 603                                 struct messaging_context *msg_ctx)
 604 {
 605         SMB_ASSERT(conn->msg_ctx == NULL);
 606         SMB_ASSERT(conn->fde == NULL);
 607 
 608         if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
 609                                        packet_get_fd(conn->pkt),
 610                                        EVENT_FD_READ,
 611                                        ctdbd_socket_handler,
 612                                        conn))) {
 613                 DEBUG(0, ("event_add_fd failed\n"));
 614                 return NT_STATUS_NO_MEMORY;
 615         }
 616 
 617         conn->msg_ctx = msg_ctx;
 618 
 619         return NT_STATUS_OK;
 620 }
 621 
 622 /*
 623  * Send a messaging message across a ctdbd
 624  */
 625 
 626 NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
 627                               uint32 dst_vnn, uint64 dst_srvid,
 628                               struct messaging_rec *msg)
 629 {
 630         struct ctdb_req_message r;
 631         TALLOC_CTX *mem_ctx;
 632         DATA_BLOB blob;
 633         NTSTATUS status;
 634         enum ndr_err_code ndr_err;
 635 
 636         if (!(mem_ctx = talloc_init("ctdbd_messaging_send"))) {
 637                 DEBUG(0, ("talloc failed\n"));
 638                 return NT_STATUS_NO_MEMORY;
 639         }
 640 
 641         ndr_err = ndr_push_struct_blob(
 642                 &blob, mem_ctx, NULL, msg,
 643                 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
 644 
 645         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 646                 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
 647                           ndr_errstr(ndr_err)));
 648                 status = ndr_map_error2ntstatus(ndr_err);
 649                 goto fail;
 650         }
 651 
 652         r.hdr.length = offsetof(struct ctdb_req_message, data) + blob.length;
 653         r.hdr.ctdb_magic = CTDB_MAGIC;
 654         r.hdr.ctdb_version = CTDB_VERSION;
 655         r.hdr.generation = 1;
 656         r.hdr.operation  = CTDB_REQ_MESSAGE;
 657         r.hdr.destnode   = dst_vnn;
 658         r.hdr.srcnode    = conn->our_vnn;
 659         r.hdr.reqid      = 0;
 660         r.srvid          = dst_srvid;
 661         r.datalen        = blob.length;
 662 
 663         DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
 664         ctdb_packet_dump(&r.hdr);
 665 
 666         status = packet_send(
 667                 conn->pkt, 2,
 668                 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
 669                 blob);
 670 
 671         if (!NT_STATUS_IS_OK(status)) {
 672                 DEBUG(0, ("packet_send failed: %s\n", nt_errstr(status)));
 673                 goto fail;
 674         }
 675 
 676         status = packet_flush(conn->pkt);
 677 
 678         if (!NT_STATUS_IS_OK(status)) {
 679                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 680                 cluster_fatal("cluster dispatch daemon msg write error\n");
 681         }
 682 
 683         status = NT_STATUS_OK;
 684  fail:
 685         TALLOC_FREE(mem_ctx);
 686         return status;
 687 }
 688 
 689 /*
 690  * send/recv a generic ctdb control message
 691  */
 692 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
 693                               uint32_t vnn, uint32 opcode, 
 694                               uint64_t srvid, uint32_t flags, 
 695                               TDB_DATA data, 
 696                               TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
 697                               int *cstatus)
 698 {
 699         struct ctdb_req_control req;
 700         struct ctdb_reply_control *reply = NULL;
 701         struct ctdbd_connection *new_conn = NULL;
 702         NTSTATUS status;
 703 
 704         /* the samba3 ctdb code can't handle NOREPLY yet */
 705         flags &= ~CTDB_CTRL_FLAG_NOREPLY;
 706 
 707         if (conn == NULL) {
 708                 status = ctdbd_init_connection(NULL, &new_conn);
 709 
 710                 if (!NT_STATUS_IS_OK(status)) {
 711                         DEBUG(10, ("Could not init temp connection: %s\n",
 712                                    nt_errstr(status)));
 713                         goto fail;
 714                 }
 715 
 716                 conn = new_conn;
 717         }
 718 
 719         ZERO_STRUCT(req);
 720         req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
 721         req.hdr.ctdb_magic   = CTDB_MAGIC;
 722         req.hdr.ctdb_version = CTDB_VERSION;
 723         req.hdr.operation    = CTDB_REQ_CONTROL;
 724         req.hdr.reqid        = ++conn->reqid;
 725         req.hdr.destnode     = vnn;
 726         req.opcode           = opcode;
 727         req.srvid            = srvid;
 728         req.datalen          = data.dsize;
 729 
 730         DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
 731         ctdb_packet_dump(&req.hdr);
 732 
 733         status = packet_send(
 734                 conn->pkt, 2,
 735                 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
 736                 data_blob_const(data.dptr, data.dsize));
 737 
 738         if (!NT_STATUS_IS_OK(status)) {
 739                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 740                 goto fail;
 741         }
 742 
 743         status = packet_flush(conn->pkt);
 744 
 745         if (!NT_STATUS_IS_OK(status)) {
 746                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 747                 cluster_fatal("cluster dispatch daemon control write error\n");
 748         }
 749 
 750         if (flags & CTDB_CTRL_FLAG_NOREPLY) {
 751                 TALLOC_FREE(new_conn);
 752                 return NT_STATUS_OK;
 753         }
 754 
 755         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 756 
 757         if (!NT_STATUS_IS_OK(status)) {
 758                 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 759                 goto fail;
 760         }
 761 
 762         if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
 763                 DEBUG(0, ("received invalid reply\n"));
 764                 goto fail;
 765         }
 766 
 767         if (outdata) {
 768                 if (!(outdata->dptr = (uint8 *)talloc_memdup(
 769                               mem_ctx, reply->data, reply->datalen))) {
 770                         TALLOC_FREE(reply);
 771                         return NT_STATUS_NO_MEMORY;
 772                 }
 773                 outdata->dsize = reply->datalen;
 774         }
 775         if (cstatus) {
 776                 (*cstatus) = reply->status;
 777         }
 778 
 779         status = NT_STATUS_OK;
 780 
 781  fail:
 782         TALLOC_FREE(new_conn);
 783         TALLOC_FREE(reply);
 784         return status;
 785 }
 786 
 787 /*
 788  * see if a remote process exists
 789  */
 790 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
     /* [<][>][^][v][top][bottom][index][help] */
 791 {
 792         NTSTATUS status;
 793         TDB_DATA data;
 794         int32_t cstatus;
 795 
 796         data.dptr = (uint8_t*)&pid;
 797         data.dsize = sizeof(pid);
 798 
 799         status = ctdbd_control(conn, vnn, CTDB_CONTROL_PROCESS_EXISTS, 0, 0,
 800                                data, NULL, NULL, &cstatus);
 801         if (!NT_STATUS_IS_OK(status)) {
 802                 DEBUG(0, (__location__ " ctdb_control for process_exists "
 803                           "failed\n"));
 804                 return False;
 805         }
 806 
 807         return cstatus == 0;
 808 }
 809 
 810 /*
 811  * Get a db path
 812  */
 813 char *ctdbd_dbpath(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
 814                    TALLOC_CTX *mem_ctx, uint32_t db_id)
 815 {
 816         NTSTATUS status;
 817         TDB_DATA data;
 818         int32_t cstatus;
 819 
 820         data.dptr = (uint8_t*)&db_id;
 821         data.dsize = sizeof(db_id);
 822 
 823         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 824                                CTDB_CONTROL_GETDBPATH, 0, 0, data, 
 825                                mem_ctx, &data, &cstatus);
 826         if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
 827                 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
 828                 return NULL;
 829         }
 830 
 831         return (char *)data.dptr;
 832 }
 833 
 834 /*
 835  * attach to a ctdb database
 836  */
 837 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
 838                          const char *name, uint32_t *db_id, int tdb_flags)
 839 {
 840         NTSTATUS status;
 841         TDB_DATA data;
 842         int32_t cstatus;
 843         bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
 844 
 845         data.dptr = (uint8_t*)name;
 846         data.dsize = strlen(name)+1;
 847 
 848         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 849                                persistent
 850                                ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
 851                                : CTDB_CONTROL_DB_ATTACH,
 852                                0, 0, data, NULL, &data, &cstatus);
 853         if (!NT_STATUS_IS_OK(status)) {
 854                 DEBUG(0, (__location__ " ctdb_control for db_attach "
 855                           "failed: %s\n", nt_errstr(status)));
 856                 return status;
 857         }
 858 
 859         if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
 860                 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
 861                 return NT_STATUS_INTERNAL_ERROR;
 862         }
 863 
 864         *db_id = *(uint32_t *)data.dptr;
 865         talloc_free(data.dptr);
 866 
 867         if (!(tdb_flags & TDB_SEQNUM)) {
 868                 return NT_STATUS_OK;
 869         }
 870 
 871         data.dptr = (uint8_t *)db_id;
 872         data.dsize = sizeof(*db_id);
 873 
 874         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
 875                                CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data, 
 876                                NULL, NULL, &cstatus);
 877         if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
 878                 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
 879                          "failed\n"));
 880                 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
 881                         status;
 882         }
 883 
 884         return NT_STATUS_OK;
 885 }
 886 
 887 /*
 888  * force the migration of a record to this node
 889  */
 890 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
     /* [<][>][^][v][top][bottom][index][help] */
 891                        TDB_DATA key)
 892 {
 893         struct ctdb_req_call req;
 894         struct ctdb_reply_call *reply;
 895         NTSTATUS status;
 896 
 897         ZERO_STRUCT(req);
 898         
 899         req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
 900         req.hdr.ctdb_magic   = CTDB_MAGIC;
 901         req.hdr.ctdb_version = CTDB_VERSION;
 902         req.hdr.operation    = CTDB_REQ_CALL;
 903         req.hdr.reqid        = ++conn->reqid;
 904         req.flags            = CTDB_IMMEDIATE_MIGRATION;
 905         req.callid           = CTDB_NULL_FUNC;
 906         req.db_id            = db_id;
 907         req.keylen           = key.dsize;
 908 
 909         DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
 910         ctdb_packet_dump(&req.hdr);
 911 
 912         status = packet_send(
 913                 conn->pkt, 2,
 914                 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
 915                 data_blob_const(key.dptr, key.dsize));
 916 
 917         if (!NT_STATUS_IS_OK(status)) {
 918                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 919                 return status;
 920         }
 921 
 922         status = packet_flush(conn->pkt);
 923 
 924         if (!NT_STATUS_IS_OK(status)) {
 925                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 926                 cluster_fatal("cluster dispatch daemon control write error\n");
 927         }
 928 
 929         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 930 
 931         if (!NT_STATUS_IS_OK(status)) {
 932                 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 933                 goto fail;
 934         }
 935 
 936         if (reply->hdr.operation != CTDB_REPLY_CALL) {
 937                 DEBUG(0, ("received invalid reply\n"));
 938                 status = NT_STATUS_INTERNAL_ERROR;
 939                 goto fail;
 940         }
 941 
 942         status = NT_STATUS_OK;
 943  fail:
 944 
 945         TALLOC_FREE(reply);
 946         return status;
 947 }
 948 
 949 /*
 950  * remotely fetch a record without locking it or forcing a migration
 951  */
 952 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
     /* [<][>][^][v][top][bottom][index][help] */
 953                      TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
 954 {
 955         struct ctdb_req_call req;
 956         struct ctdb_reply_call *reply;
 957         NTSTATUS status;
 958 
 959         ZERO_STRUCT(req);
 960         
 961         req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
 962         req.hdr.ctdb_magic   = CTDB_MAGIC;
 963         req.hdr.ctdb_version = CTDB_VERSION;
 964         req.hdr.operation    = CTDB_REQ_CALL;
 965         req.hdr.reqid        = ++conn->reqid;
 966         req.flags            = 0;
 967         req.callid           = CTDB_FETCH_FUNC;
 968         req.db_id            = db_id;
 969         req.keylen           = key.dsize;
 970 
 971         status = packet_send(
 972                 conn->pkt, 2,
 973                 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
 974                 data_blob_const(key.dptr, key.dsize));
 975 
 976         if (!NT_STATUS_IS_OK(status)) {
 977                 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
 978                 return status;
 979         }
 980 
 981         status = packet_flush(conn->pkt);
 982 
 983         if (!NT_STATUS_IS_OK(status)) {
 984                 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
 985                 cluster_fatal("cluster dispatch daemon control write error\n");
 986         }
 987 
 988         status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
 989 
 990         if (!NT_STATUS_IS_OK(status)) {
 991                 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
 992                 goto fail;
 993         }
 994 
 995         if (reply->hdr.operation != CTDB_REPLY_CALL) {
 996                 DEBUG(0, ("received invalid reply\n"));
 997                 status = NT_STATUS_INTERNAL_ERROR;
 998                 goto fail;
 999         }
1000 
1001         data->dsize = reply->datalen;
1002         if (data->dsize == 0) {
1003                 data->dptr = NULL;
1004                 goto done;
1005         }
1006 
1007         data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1008                                             reply->datalen);
1009         if (data->dptr == NULL) {
1010                 DEBUG(0, ("talloc failed\n"));
1011                 status = NT_STATUS_NO_MEMORY;
1012                 goto fail;
1013         }
1014 
1015  done:
1016         status = NT_STATUS_OK;
1017  fail:
1018         TALLOC_FREE(reply);
1019         return status;
1020 }
1021 
1022 struct ctdbd_traverse_state {
1023         void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1024         void *private_data;
1025 };
1026 
1027 /*
1028  * Handle a traverse record coming in on the ctdbd connection
1029  */
1030 
1031 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
     /* [<][>][^][v][top][bottom][index][help] */
1032                                       void *private_data)
1033 {
1034         struct ctdbd_traverse_state *state =
1035                 (struct ctdbd_traverse_state *)private_data;
1036 
1037         struct ctdb_req_message *m;
1038         struct ctdb_rec_data *d;
1039         TDB_DATA key, data;
1040 
1041         m = (struct ctdb_req_message *)buf;
1042 
1043         if (length < sizeof(*m) || m->hdr.length != length) {
1044                 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1045                 TALLOC_FREE(buf);
1046                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1047         }
1048 
1049         d = (struct ctdb_rec_data *)&m->data[0];
1050         if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1051                 DEBUG(0, ("Got invalid traverse data of length %d\n",
1052                           (int)m->datalen));
1053                 TALLOC_FREE(buf);
1054                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1055         }
1056 
1057         key.dsize = d->keylen;
1058         key.dptr  = &d->data[0];
1059         data.dsize = d->datalen;
1060         data.dptr = &d->data[d->keylen];                
1061 
1062         if (key.dsize == 0 && data.dsize == 0) {
1063                 /* end of traverse */
1064                 return NT_STATUS_END_OF_FILE;
1065         }
1066 
1067         if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1068                 DEBUG(0, ("Got invalid ltdb header length %d\n",
1069                           (int)data.dsize));
1070                 TALLOC_FREE(buf);
1071                 return NT_STATUS_UNEXPECTED_IO_ERROR;
1072         }
1073         data.dsize -= sizeof(struct ctdb_ltdb_header);
1074         data.dptr += sizeof(struct ctdb_ltdb_header);
1075 
1076         if (state->fn) {
1077                 state->fn(key, data, state->private_data);
1078         }
1079 
1080         TALLOC_FREE(buf);
1081         return NT_STATUS_OK;
1082 }
1083 
1084 /*
1085   Traverse a ctdb database. This uses a kind-of hackish way to open a second
1086   connection to ctdbd to avoid the hairy recursive and async problems with
1087   everything in-line.
1088 */
1089 
1090 NTSTATUS ctdbd_traverse(uint32 db_id,
     /* [<][>][^][v][top][bottom][index][help] */
1091                         void (*fn)(TDB_DATA key, TDB_DATA data,
1092                                    void *private_data),
1093                         void *private_data)
1094 {
1095         struct ctdbd_connection *conn;
1096         NTSTATUS status;
1097 
1098         TDB_DATA data;
1099         struct ctdb_traverse_start t;
1100         int cstatus;
1101         struct ctdbd_traverse_state state;
1102 
1103         status = ctdbd_init_connection(NULL, &conn);
1104         if (!NT_STATUS_IS_OK(status)) {
1105                 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1106                           nt_errstr(status)));
1107                 return status;
1108         }
1109 
1110         t.db_id = db_id;
1111         t.srvid = conn->rand_srvid;
1112         t.reqid = ++conn->reqid;
1113 
1114         data.dptr = (uint8_t *)&t;
1115         data.dsize = sizeof(t);
1116 
1117         status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1118                                CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1119                                data, NULL, NULL, &cstatus);
1120 
1121         if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1122 
1123                 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1124                          cstatus));
1125 
1126                 if (NT_STATUS_IS_OK(status)) {
1127                         /*
1128                          * We need a mapping here
1129                          */
1130                         status = NT_STATUS_UNSUCCESSFUL;
1131                 }
1132                 goto done;
1133         }
1134 
1135         state.fn = fn;
1136         state.private_data = private_data;
1137 
1138         while (True) {
1139 
1140                 status = NT_STATUS_OK;
1141 
1142                 if (packet_handler(conn->pkt, ctdb_req_complete,
1143                                    ctdb_traverse_handler, &state, &status)) {
1144 
1145                         if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1146                                 status = NT_STATUS_OK;
1147                                 break;
1148                         }
1149 
1150                         /*
1151                          * There might be more in the queue
1152                          */
1153                         continue;
1154                 }
1155 
1156                 if (!NT_STATUS_IS_OK(status)) {
1157                         break;
1158                 }
1159 
1160                 status = packet_fd_read_sync(conn->pkt);
1161 
1162                 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1163                         /*
1164                          * There might be more in the queue
1165                          */
1166                         continue;
1167                 }
1168 
1169                 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1170                         status = NT_STATUS_OK;
1171                 }
1172 
1173                 if (!NT_STATUS_IS_OK(status)) {
1174                         DEBUG(0, ("packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1175                         cluster_fatal("ctdbd died\n");
1176                 }
1177         }
1178 
1179  done:
1180         TALLOC_FREE(conn);
1181         return status;
1182 }
1183 
1184 /*
1185    This is used to canonicalize a ctdb_sock_addr structure.
1186 */
1187 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
     /* [<][>][^][v][top][bottom][index][help] */
1188                                       struct sockaddr_storage *out)
1189 {
1190         memcpy(out, in, sizeof (*out));
1191 
1192 #ifdef HAVE_IPV6
1193         if (in->ss_family == AF_INET6) {
1194                 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1195                 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1196                 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1197                 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1198                         memset(out, 0, sizeof(*out));
1199 #ifdef HAVE_SOCK_SIN_LEN
1200                         out4->sin_len = sizeof(*out);
1201 #endif
1202                         out4->sin_family = AF_INET;
1203                         out4->sin_port   = in6->sin6_port;
1204                         memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1205                 }
1206         }
1207 #endif
1208 }
1209 
1210 /*
1211  * Register us as a server for a particular tcp connection
1212  */
1213 
1214 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
     /* [<][>][^][v][top][bottom][index][help] */
1215                             const struct sockaddr_storage *_server,
1216                             const struct sockaddr_storage *_client,
1217                             void (*release_ip_handler)(const char *ip_addr,
1218                                                        void *private_data),
1219                             void *private_data)
1220 {
1221         /*
1222          * we still use ctdb_control_tcp for ipv4
1223          * because we want to work against older ctdb
1224          * versions at runtime
1225          */
1226         struct ctdb_control_tcp p4;
1227 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1228         struct ctdb_control_tcp_addr p;
1229 #endif
1230         TDB_DATA data;
1231         NTSTATUS status;
1232         struct sockaddr_storage client;
1233         struct sockaddr_storage server;
1234 
1235         /*
1236          * Only one connection so far
1237          */
1238         SMB_ASSERT(conn->release_ip_handler == NULL);
1239 
1240         smbd_ctdb_canonicalize_ip(_client, &client);
1241         smbd_ctdb_canonicalize_ip(_server, &server);
1242 
1243         switch (client.ss_family) {
1244         case AF_INET:
1245                 p4.dest = *(struct sockaddr_in *)&server;
1246                 p4.src = *(struct sockaddr_in *)&client;
1247                 data.dptr = (uint8_t *)&p4;
1248                 data.dsize = sizeof(p4);
1249                 break;
1250 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1251         case AF_INET6:
1252                 p.dest.ip6 = *(struct sockaddr_in6 *)&server;
1253                 p.src.ip6 = *(struct sockaddr_in6 *)&client;
1254                 data.dptr = (uint8_t *)&p;
1255                 data.dsize = sizeof(p);
1256                 break;
1257 #endif
1258         default:
1259                 return NT_STATUS_INTERNAL_ERROR;
1260         }
1261 
1262         conn->release_ip_handler = release_ip_handler;
1263 
1264         /*
1265          * We want to be told about IP releases
1266          */
1267 
1268         status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1269         if (!NT_STATUS_IS_OK(status)) {
1270                 return status;
1271         }
1272 
1273         /*
1274          * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1275          * can send an extra ack to trigger a reset for our client, so it
1276          * immediately reconnects
1277          */
1278         return ctdbd_control(conn, CTDB_CURRENT_NODE, 
1279                              CTDB_CONTROL_TCP_CLIENT, 0,
1280                              CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1281 }
1282 
1283 /*
1284  * We want to handle reconfigure events
1285  */
1286 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
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1287 {
1288         return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1289 }
1290 
1291 /*
1292   call a control on the local node
1293  */
1294 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode, 
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1295                              uint64_t srvid, uint32_t flags, TDB_DATA data, 
1296                              TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1297                              int *cstatus)
1298 {
1299         return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1300 }
1301 
1302 #else
1303 
1304 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
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1305                                struct ctdbd_connection **pconn)
1306 {
1307         return NT_STATUS_NOT_IMPLEMENTED;
1308 }
1309 
1310 #endif

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