source3/smbd/smb2_tcon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   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 #include "smbd/smbd.h"
  23 #include "smbd/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25 #include "../libcli/security/security.h"
  26 #include "auth.h"
  27 #include "lib/param/loadparm.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_SMB2
  32
  33 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
  34                                         struct tevent_context *ev,
  35                                         struct smbd_smb2_request *smb2req,
  36                                         const char *in_path);
  37 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
  38                                             uint8_t *out_share_type,
  39                                             uint32_t *out_share_flags,
  40                                             uint32_t *out_capabilities,
  41                                             uint32_t *out_maximal_access,
  42                                             uint32_t *out_tree_id,
  43                                             bool *disconnect);
  44
  45 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
  46
  47 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
  48 {
  49         const uint8_t *inbody;
  50         uint16_t in_path_offset;
  51         uint16_t in_path_length;
  52         DATA_BLOB in_path_buffer;
  53         char *in_path_string;
  54         size_t in_path_string_size;
  55         NTSTATUS status;
  56         bool ok;
  57         struct tevent_req *subreq;
  58
  59         status = smbd_smb2_request_verify_sizes(req, 0x09);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 return smbd_smb2_request_error(req, status);
  62         }
  63         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  64
  65         in_path_offset = SVAL(inbody, 0x04);
  66         in_path_length = SVAL(inbody, 0x06);
  67
  68         if (in_path_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  69                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  70         }
  71
  72         if (in_path_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  73                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  74         }
  75
  76         in_path_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  77         in_path_buffer.length = in_path_length;
  78
  79         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
  80                                    in_path_buffer.data,
  81                                    in_path_buffer.length,
  82                                    &in_path_string,
  83                                    &in_path_string_size);
  84         if (!ok) {
  85                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
  86         }
  87
  88         if (in_path_buffer.length == 0) {
  89                 in_path_string_size = 0;
  90         }
  91
  92         if (strlen(in_path_string) != in_path_string_size) {
  93                 return smbd_smb2_request_error(req, NT_STATUS_BAD_NETWORK_NAME);
  94         }
  95
  96         subreq = smbd_smb2_tree_connect_send(req,
  97                                              req->sconn->ev_ctx,
  98                                              req,
  99                                              in_path_string);
 100         if (subreq == NULL) {
 101                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 102         }
 103         tevent_req_set_callback(subreq, smbd_smb2_request_tcon_done, req);
 104
 105         return smbd_smb2_request_pending_queue(req, subreq, 500);
 106 }
 107
 108 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
 109 {
 110         struct smbd_smb2_request *req =
 111                 tevent_req_callback_data(subreq,
 112                 struct smbd_smb2_request);
 113         uint8_t *outhdr;
 114         DATA_BLOB outbody;
 115         uint8_t out_share_type = 0;
 116         uint32_t out_share_flags = 0;
 117         uint32_t out_capabilities = 0;
 118         uint32_t out_maximal_access = 0;
 119         uint32_t out_tree_id = 0;
 120         bool disconnect = false;
 121         NTSTATUS status;
 122         NTSTATUS error;
 123
 124         status = smbd_smb2_tree_connect_recv(subreq,
 125                                              &out_share_type,
 126                                              &out_share_flags,
 127                                              &out_capabilities,
 128                                              &out_maximal_access,
 129                                              &out_tree_id,
 130                                              &disconnect);
 131         TALLOC_FREE(subreq);
 132         if (!NT_STATUS_IS_OK(status)) {
 133                 if (disconnect) {
 134                         smbd_server_connection_terminate(req->xconn,
 135                                                          nt_errstr(status));
 136                         return;
 137                 }
 138                 error = smbd_smb2_request_error(req, status);
 139                 if (!NT_STATUS_IS_OK(error)) {
 140                         smbd_server_connection_terminate(req->xconn,
 141                                                          nt_errstr(error));
 142                         return;
 143                 }
 144                 return;
 145         }
 146
 147         outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
 148
 149         outbody = smbd_smb2_generate_outbody(req, 0x10);
 150         if (outbody.data == NULL) {
 151                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 152                 if (!NT_STATUS_IS_OK(error)) {
 153                         smbd_server_connection_terminate(req->xconn,
 154                                                          nt_errstr(error));
 155                         return;
 156                 }
 157                 return;
 158         }
 159
 160         SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
 161
 162         SSVAL(outbody.data, 0x00, 0x10);        /* struct size */
 163         SCVAL(outbody.data, 0x02,
 164               out_share_type);                  /* share type */
 165         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 166         SIVAL(outbody.data, 0x04,
 167               out_share_flags);                 /* share flags */
 168         SIVAL(outbody.data, 0x08,
 169               out_capabilities);                /* capabilities */
 170         SIVAL(outbody.data, 0x0C,
 171               out_maximal_access);              /* maximal access */
 172
 173         error = smbd_smb2_request_done(req, outbody, NULL);
 174         if (!NT_STATUS_IS_OK(error)) {
 175                 smbd_server_connection_terminate(req->xconn,
 176                                                  nt_errstr(error));
 177                 return;
 178         }
 179 }
 180
 181 static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
 182                                        const char *in_path,
 183                                        uint8_t *out_share_type,
 184                                        uint32_t *out_share_flags,
 185                                        uint32_t *out_capabilities,
 186                                        uint32_t *out_maximal_access,
 187                                        uint32_t *out_tree_id,
 188                                        bool *disconnect)
 189 {
 190         struct smbXsrv_connection *conn = req->xconn;
 191         const char *share = in_path;
 192         char *service = NULL;
 193         int snum = -1;
 194         struct smbXsrv_tcon *tcon;
 195         NTTIME now = timeval_to_nttime(&req->request_time);
 196         connection_struct *compat_conn = NULL;
 197         struct user_struct *compat_vuser = req->session->compat;
 198         NTSTATUS status;
 199         bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
 200         bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
 201         bool guest_session = false;
 202         bool require_signed_tcon = false;
 203
 204         *disconnect = false;
 205
 206         if (strncmp(share, "\\\\", 2) == 0) {
 207                 const char *p = strchr(share+2, '\\');
 208                 if (p) {
 209                         share = p + 1;
 210                 }
 211         }
 212
 213         DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
 214                   in_path, share));
 215
 216         if (security_session_user_level(compat_vuser->session_info, NULL) < SECURITY_USER) {
 217                 guest_session = true;
 218         }
 219
 220         if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
 221                 require_signed_tcon = true;
 222         }
 223
 224         if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
 225                 DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
 226                           "[%s] as '%s\\%s' without encryption or signing. "
 227                           "Disconnecting.\n",
 228                           share,
 229                           req->session->global->auth_session_info->info->domain_name,
 230                           req->session->global->auth_session_info->info->account_name));
 231                 *disconnect = true;
 232                 return NT_STATUS_ACCESS_DENIED;
 233         }
 234
 235         service = talloc_strdup(talloc_tos(), share);
 236         if(!service) {
 237                 return NT_STATUS_NO_MEMORY;
 238         }
 239
 240         if (!strlower_m(service)) {
 241                 DEBUG(2, ("strlower_m %s failed\n", service));
 242                 return NT_STATUS_INVALID_PARAMETER;
 243         }
 244
 245         /* TODO: do more things... */
 246         if (strequal(service,HOMES_NAME)) {
 247                 if (compat_vuser->homes_snum == -1) {
 248                         DEBUG(2, ("[homes] share not available for "
 249                                 "user %s because it was not found "
 250                                 "or created at session setup "
 251                                 "time\n",
 252                                 compat_vuser->session_info->unix_info->unix_name));
 253                         return NT_STATUS_BAD_NETWORK_NAME;
 254                 }
 255                 snum = compat_vuser->homes_snum;
 256         } else if ((compat_vuser->homes_snum != -1)
 257                    && strequal(service,
 258                         lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
 259                 snum = compat_vuser->homes_snum;
 260         } else {
 261                 snum = find_service(talloc_tos(), service, &service);
 262                 if (!service) {
 263                         return NT_STATUS_NO_MEMORY;
 264                 }
 265         }
 266
 267         if (snum < 0) {
 268                 DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
 269                          service));
 270                 return NT_STATUS_BAD_NETWORK_NAME;
 271         }
 272
 273         /* Handle non-DFS clients attempting connections to msdfs proxy */
 274         if (lp_host_msdfs()) {
 275                 char *proxy = lp_msdfs_proxy(talloc_tos(), snum);
 276
 277                 if ((proxy != NULL) && (*proxy != '\0')) {
 278                         DBG_NOTICE("refusing connection to dfs proxy share "
 279                                    "'%s' (pointing to %s)\n",
 280                                    service,
 281                                    proxy);
 282                         TALLOC_FREE(proxy);
 283                         return NT_STATUS_BAD_NETWORK_NAME;
 284                 }
 285                 TALLOC_FREE(proxy);
 286         }
 287
 288         if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
 289             (conn->smb2.server.cipher != 0))
 290         {
 291                 encryption_desired = true;
 292         }
 293
 294         if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
 295                 encryption_desired = true;
 296                 encryption_required = true;
 297         }
 298
 299         if (guest_session && encryption_required) {
 300                 DEBUG(1,("reject guest as encryption is required for service %s\n",
 301                          service));
 302                 return NT_STATUS_ACCESS_DENIED;
 303         }
 304
 305         if (conn->smb2.server.cipher == 0) {
 306                 if (encryption_required) {
 307                         DEBUG(1,("reject tcon with dialect[0x%04X] "
 308                                  "as encryption is required for service %s\n",
 309                                  conn->smb2.server.dialect, service));
 310                         return NT_STATUS_ACCESS_DENIED;
 311                 }
 312         }
 313
 314         /* create a new tcon as child of the session */
 315         status = smb2srv_tcon_create(req->session, now, &tcon);
 316         if (!NT_STATUS_IS_OK(status)) {
 317                 return status;
 318         }
 319
 320         if (encryption_desired) {
 321                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
 322         }
 323         if (encryption_required) {
 324                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
 325         }
 326
 327         compat_conn = make_connection_smb2(req,
 328                                         tcon, snum,
 329                                         req->session->compat,
 330                                         "???",
 331                                         &status);
 332         if (compat_conn == NULL) {
 333                 TALLOC_FREE(tcon);
 334                 return status;
 335         }
 336
 337         tcon->global->share_name = lp_servicename(tcon->global,
 338                                                   SNUM(compat_conn));
 339         if (tcon->global->share_name == NULL) {
 340                 conn_free(compat_conn);
 341                 TALLOC_FREE(tcon);
 342                 return NT_STATUS_NO_MEMORY;
 343         }
 344         tcon->global->session_global_id =
 345                 req->session->global->session_global_id;
 346
 347         tcon->compat = talloc_move(tcon, &compat_conn);
 348
 349         tcon->status = NT_STATUS_OK;
 350
 351         status = smbXsrv_tcon_update(tcon);
 352         if (!NT_STATUS_IS_OK(status)) {
 353                 TALLOC_FREE(tcon);
 354                 return status;
 355         }
 356
 357         if (IS_PRINT(tcon->compat)) {
 358                 *out_share_type = SMB2_SHARE_TYPE_PRINT;
 359         } else if (IS_IPC(tcon->compat)) {
 360                 *out_share_type = SMB2_SHARE_TYPE_PIPE;
 361         } else {
 362                 *out_share_type = SMB2_SHARE_TYPE_DISK;
 363         }
 364
 365         *out_share_flags = 0;
 366
 367         if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
 368                 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
 369                 *out_capabilities = SMB2_SHARE_CAP_DFS;
 370         } else {
 371                 *out_capabilities = 0;
 372         }
 373
 374         switch(lp_csc_policy(SNUM(tcon->compat))) {
 375         case CSC_POLICY_MANUAL:
 376                 break;
 377         case CSC_POLICY_DOCUMENTS:
 378                 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
 379                 break;
 380         case CSC_POLICY_PROGRAMS:
 381                 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
 382                 break;
 383         case CSC_POLICY_DISABLE:
 384                 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
 385                 break;
 386         default:
 387                 break;
 388         }
 389
 390         if (lp_hide_unreadable(SNUM(tcon->compat)) ||
 391             lp_hide_unwriteable_files(SNUM(tcon->compat))) {
 392                 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
 393         }
 394
 395         if (encryption_desired) {
 396                 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
 397         }
 398
 399         *out_maximal_access = tcon->compat->share_access;
 400
 401         *out_tree_id = tcon->global->tcon_wire_id;
 402         req->last_tid = tcon->global->tcon_wire_id;
 403
 404         return NT_STATUS_OK;
 405 }
 406
 407 struct smbd_smb2_tree_connect_state {
 408         const char *in_path;
 409         uint8_t out_share_type;
 410         uint32_t out_share_flags;
 411         uint32_t out_capabilities;
 412         uint32_t out_maximal_access;
 413         uint32_t out_tree_id;
 414         bool disconnect;
 415 };
 416
 417 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
 418                                         struct tevent_context *ev,
 419                                         struct smbd_smb2_request *smb2req,
 420                                         const char *in_path)
 421 {
 422         struct tevent_req *req;
 423         struct smbd_smb2_tree_connect_state *state;
 424         NTSTATUS status;
 425
 426         req = tevent_req_create(mem_ctx, &state,
 427                                 struct smbd_smb2_tree_connect_state);
 428         if (req == NULL) {
 429                 return NULL;
 430         }
 431         state->in_path = in_path;
 432
 433         status = smbd_smb2_tree_connect(smb2req,
 434                                         state->in_path,
 435                                         &state->out_share_type,
 436                                         &state->out_share_flags,
 437                                         &state->out_capabilities,
 438                                         &state->out_maximal_access,
 439                                         &state->out_tree_id,
 440                                         &state->disconnect);
 441         if (tevent_req_nterror(req, status)) {
 442                 return tevent_req_post(req, ev);
 443         }
 444
 445         tevent_req_done(req);
 446         return tevent_req_post(req, ev);
 447 }
 448
 449 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
 450                                             uint8_t *out_share_type,
 451                                             uint32_t *out_share_flags,
 452                                             uint32_t *out_capabilities,
 453                                             uint32_t *out_maximal_access,
 454                                             uint32_t *out_tree_id,
 455                                             bool *disconnect)
 456 {
 457         struct smbd_smb2_tree_connect_state *state =
 458                 tevent_req_data(req,
 459                 struct smbd_smb2_tree_connect_state);
 460         NTSTATUS status;
 461
 462         if (tevent_req_is_nterror(req, &status)) {
 463                 tevent_req_received(req);
 464                 return status;
 465         }
 466
 467         *out_share_type = state->out_share_type;
 468         *out_share_flags = state->out_share_flags;
 469         *out_capabilities = state->out_capabilities;
 470         *out_maximal_access = state->out_maximal_access;
 471         *out_tree_id = state->out_tree_id;
 472         *disconnect = state->disconnect;
 473
 474         tevent_req_received(req);
 475         return NT_STATUS_OK;
 476 }
 477
 478 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 479                                         struct tevent_context *ev,
 480                                         struct smbd_smb2_request *smb2req);
 481 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
 482 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
 483
 484 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
 485 {
 486         NTSTATUS status;
 487         struct tevent_req *subreq = NULL;
 488
 489         status = smbd_smb2_request_verify_sizes(req, 0x04);
 490         if (!NT_STATUS_IS_OK(status)) {
 491                 return smbd_smb2_request_error(req, status);
 492         }
 493
 494         subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
 495         if (subreq == NULL) {
 496                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 497         }
 498         tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
 499
 500         /*
 501          * Wait a long time before going async on this to allow
 502          * requests we're waiting on to finish. Set timeout to 10 secs.
 503          */
 504         return smbd_smb2_request_pending_queue(req, subreq, 10000000);
 505 }
 506
 507 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
 508 {
 509         struct smbd_smb2_request *smb2req =
 510                 tevent_req_callback_data(subreq,
 511                 struct smbd_smb2_request);
 512         DATA_BLOB outbody;
 513         NTSTATUS status;
 514         NTSTATUS error;
 515
 516         status = smbd_smb2_tdis_recv(subreq);
 517         TALLOC_FREE(subreq);
 518         if (!NT_STATUS_IS_OK(status)) {
 519                 error = smbd_smb2_request_error(smb2req, status);
 520                 if (!NT_STATUS_IS_OK(error)) {
 521                         smbd_server_connection_terminate(smb2req->xconn,
 522                                                         nt_errstr(error));
 523                         return;
 524                 }
 525                 return;
 526         }
 527
 528         outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
 529         if (outbody.data == NULL) {
 530                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 531                 if (!NT_STATUS_IS_OK(error)) {
 532                         smbd_server_connection_terminate(smb2req->xconn,
 533                                                         nt_errstr(error));
 534                         return;
 535                 }
 536                 return;
 537         }
 538
 539         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 540         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 541
 542         error = smbd_smb2_request_done(smb2req, outbody, NULL);
 543         if (!NT_STATUS_IS_OK(error)) {
 544                 smbd_server_connection_terminate(smb2req->xconn,
 545                                                 nt_errstr(error));
 546                 return;
 547         }
 548 }
 549
 550 struct smbd_smb2_tdis_state {
 551         struct smbd_smb2_request *smb2req;
 552         struct tevent_queue *wait_queue;
 553 };
 554
 555 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
 556
 557 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 558                                         struct tevent_context *ev,
 559                                         struct smbd_smb2_request *smb2req)
 560 {
 561         struct tevent_req *req;
 562         struct smbd_smb2_tdis_state *state;
 563         struct tevent_req *subreq;
 564         struct smbXsrv_connection *xconn = NULL;
 565
 566         req = tevent_req_create(mem_ctx, &state,
 567                         struct smbd_smb2_tdis_state);
 568         if (req == NULL) {
 569                 return NULL;
 570         }
 571         state->smb2req = smb2req;
 572
 573         state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
 574         if (tevent_req_nomem(state->wait_queue, req)) {
 575                 return tevent_req_post(req, ev);
 576         }
 577
 578         /*
 579          * Make sure that no new request will be able to use this tcon.
 580          */
 581         smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
 582
 583         xconn = smb2req->xconn->client->connections;
 584         for (; xconn != NULL; xconn = xconn->next) {
 585                 struct smbd_smb2_request *preq;
 586
 587                 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
 588                         if (preq == smb2req) {
 589                                 /* Can't cancel current request. */
 590                                 continue;
 591                         }
 592                         if (preq->tcon != smb2req->tcon) {
 593                                 /* Request on different tcon. */
 594                                 continue;
 595                         }
 596
 597                         /*
 598                          * Never cancel anything in a compound
 599                          * request. Way too hard to deal with
 600                          * the result.
 601                          */
 602                         if (!preq->compound_related && preq->subreq != NULL) {
 603                                 tevent_req_cancel(preq->subreq);
 604                         }
 605
 606                         /*
 607                          * Now wait until the request is finished.
 608                          *
 609                          * We don't set a callback, as we just want to block the
 610                          * wait queue and the talloc_free() of the request will
 611                          * remove the item from the wait queue.
 612                          */
 613                         subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
 614                         if (tevent_req_nomem(subreq, req)) {
 615                                 return tevent_req_post(req, ev);
 616                         }
 617                 }
 618         }
 619
 620         /*
 621          * Now we add our own waiter to the end of the queue,
 622          * this way we get notified when all pending requests are finished
 623          * and send to the socket.
 624          */
 625         subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
 626         if (tevent_req_nomem(subreq, req)) {
 627                 return tevent_req_post(req, ev);
 628         }
 629         tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
 630
 631         return req;
 632 }
 633
 634 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
 635 {
 636         struct tevent_req *req = tevent_req_callback_data(
 637                 subreq, struct tevent_req);
 638         struct smbd_smb2_tdis_state *state = tevent_req_data(
 639                 req, struct smbd_smb2_tdis_state);
 640         NTSTATUS status;
 641
 642         tevent_queue_wait_recv(subreq);
 643         TALLOC_FREE(subreq);
 644
 645         /*
 646          * As we've been awoken, we may have changed
 647          * uid in the meantime. Ensure we're still
 648          * root (SMB2_OP_TDIS has .as_root = true).
 649          */
 650         change_to_root_user();
 651
 652         status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
 653                                          state->smb2req->tcon->compat->vuid);
 654         if (tevent_req_nterror(req, status)) {
 655                 return;
 656         }
 657
 658         /* We did tear down the tcon. */
 659         TALLOC_FREE(state->smb2req->tcon);
 660         tevent_req_done(req);
 661 }
 662
 663 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
 664 {
 665         return tevent_req_simple_recv_ntstatus(req);
 666 }