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         if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
 274             (conn->smb2.server.cipher != 0))
 275         {
 276                 encryption_desired = true;
 277         }
 278
 279         if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
 280                 encryption_desired = true;
 281                 encryption_required = true;
 282         }
 283
 284         if (guest_session && encryption_required) {
 285                 DEBUG(1,("reject guest as encryption is required for service %s\n",
 286                          service));
 287                 return NT_STATUS_ACCESS_DENIED;
 288         }
 289
 290         if (conn->smb2.server.cipher == 0) {
 291                 if (encryption_required) {
 292                         DEBUG(1,("reject tcon with dialect[0x%04X] "
 293                                  "as encryption is required for service %s\n",
 294                                  conn->smb2.server.dialect, service));
 295                         return NT_STATUS_ACCESS_DENIED;
 296                 }
 297         }
 298
 299         /* create a new tcon as child of the session */
 300         status = smb2srv_tcon_create(req->session, now, &tcon);
 301         if (!NT_STATUS_IS_OK(status)) {
 302                 return status;
 303         }
 304
 305         if (encryption_desired) {
 306                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
 307         }
 308         if (encryption_required) {
 309                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
 310         }
 311
 312         compat_conn = make_connection_smb2(req,
 313                                         tcon, snum,
 314                                         req->session->compat,
 315                                         "???",
 316                                         &status);
 317         if (compat_conn == NULL) {
 318                 TALLOC_FREE(tcon);
 319                 return status;
 320         }
 321
 322         tcon->global->share_name = lp_servicename(tcon->global,
 323                                                   SNUM(compat_conn));
 324         if (tcon->global->share_name == NULL) {
 325                 conn_free(compat_conn);
 326                 TALLOC_FREE(tcon);
 327                 return NT_STATUS_NO_MEMORY;
 328         }
 329         tcon->global->session_global_id =
 330                 req->session->global->session_global_id;
 331
 332         tcon->compat = talloc_move(tcon, &compat_conn);
 333
 334         tcon->status = NT_STATUS_OK;
 335
 336         status = smbXsrv_tcon_update(tcon);
 337         if (!NT_STATUS_IS_OK(status)) {
 338                 TALLOC_FREE(tcon);
 339                 return status;
 340         }
 341
 342         if (IS_PRINT(tcon->compat)) {
 343                 *out_share_type = SMB2_SHARE_TYPE_PRINT;
 344         } else if (IS_IPC(tcon->compat)) {
 345                 *out_share_type = SMB2_SHARE_TYPE_PIPE;
 346         } else {
 347                 *out_share_type = SMB2_SHARE_TYPE_DISK;
 348         }
 349
 350         *out_share_flags = 0;
 351
 352         if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
 353                 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
 354                 *out_capabilities = SMB2_SHARE_CAP_DFS;
 355         } else {
 356                 *out_capabilities = 0;
 357         }
 358
 359         switch(lp_csc_policy(SNUM(tcon->compat))) {
 360         case CSC_POLICY_MANUAL:
 361                 break;
 362         case CSC_POLICY_DOCUMENTS:
 363                 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
 364                 break;
 365         case CSC_POLICY_PROGRAMS:
 366                 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
 367                 break;
 368         case CSC_POLICY_DISABLE:
 369                 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
 370                 break;
 371         default:
 372                 break;
 373         }
 374
 375         if (lp_hide_unreadable(SNUM(tcon->compat)) ||
 376             lp_hide_unwriteable_files(SNUM(tcon->compat))) {
 377                 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
 378         }
 379
 380         if (encryption_desired) {
 381                 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
 382         }
 383
 384         *out_maximal_access = tcon->compat->share_access;
 385
 386         *out_tree_id = tcon->global->tcon_wire_id;
 387         req->last_tid = tcon->global->tcon_wire_id;
 388
 389         return NT_STATUS_OK;
 390 }
 391
 392 struct smbd_smb2_tree_connect_state {
 393         const char *in_path;
 394         uint8_t out_share_type;
 395         uint32_t out_share_flags;
 396         uint32_t out_capabilities;
 397         uint32_t out_maximal_access;
 398         uint32_t out_tree_id;
 399         bool disconnect;
 400 };
 401
 402 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
 403                                         struct tevent_context *ev,
 404                                         struct smbd_smb2_request *smb2req,
 405                                         const char *in_path)
 406 {
 407         struct tevent_req *req;
 408         struct smbd_smb2_tree_connect_state *state;
 409         NTSTATUS status;
 410
 411         req = tevent_req_create(mem_ctx, &state,
 412                                 struct smbd_smb2_tree_connect_state);
 413         if (req == NULL) {
 414                 return NULL;
 415         }
 416         state->in_path = in_path;
 417
 418         status = smbd_smb2_tree_connect(smb2req,
 419                                         state->in_path,
 420                                         &state->out_share_type,
 421                                         &state->out_share_flags,
 422                                         &state->out_capabilities,
 423                                         &state->out_maximal_access,
 424                                         &state->out_tree_id,
 425                                         &state->disconnect);
 426         if (tevent_req_nterror(req, status)) {
 427                 return tevent_req_post(req, ev);
 428         }
 429
 430         tevent_req_done(req);
 431         return tevent_req_post(req, ev);
 432 }
 433
 434 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
 435                                             uint8_t *out_share_type,
 436                                             uint32_t *out_share_flags,
 437                                             uint32_t *out_capabilities,
 438                                             uint32_t *out_maximal_access,
 439                                             uint32_t *out_tree_id,
 440                                             bool *disconnect)
 441 {
 442         struct smbd_smb2_tree_connect_state *state =
 443                 tevent_req_data(req,
 444                 struct smbd_smb2_tree_connect_state);
 445         NTSTATUS status;
 446
 447         if (tevent_req_is_nterror(req, &status)) {
 448                 tevent_req_received(req);
 449                 return status;
 450         }
 451
 452         *out_share_type = state->out_share_type;
 453         *out_share_flags = state->out_share_flags;
 454         *out_capabilities = state->out_capabilities;
 455         *out_maximal_access = state->out_maximal_access;
 456         *out_tree_id = state->out_tree_id;
 457         *disconnect = state->disconnect;
 458
 459         tevent_req_received(req);
 460         return NT_STATUS_OK;
 461 }
 462
 463 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 464                                         struct tevent_context *ev,
 465                                         struct smbd_smb2_request *smb2req);
 466 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
 467 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
 468
 469 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
 470 {
 471         NTSTATUS status;
 472         struct tevent_req *subreq = NULL;
 473
 474         status = smbd_smb2_request_verify_sizes(req, 0x04);
 475         if (!NT_STATUS_IS_OK(status)) {
 476                 return smbd_smb2_request_error(req, status);
 477         }
 478
 479         subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
 480         if (subreq == NULL) {
 481                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 482         }
 483         tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
 484
 485         /*
 486          * Wait a long time before going async on this to allow
 487          * requests we're waiting on to finish. Set timeout to 10 secs.
 488          */
 489         return smbd_smb2_request_pending_queue(req, subreq, 10000000);
 490 }
 491
 492 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
 493 {
 494         struct smbd_smb2_request *smb2req =
 495                 tevent_req_callback_data(subreq,
 496                 struct smbd_smb2_request);
 497         DATA_BLOB outbody;
 498         NTSTATUS status;
 499         NTSTATUS error;
 500
 501         status = smbd_smb2_tdis_recv(subreq);
 502         TALLOC_FREE(subreq);
 503         if (!NT_STATUS_IS_OK(status)) {
 504                 error = smbd_smb2_request_error(smb2req, status);
 505                 if (!NT_STATUS_IS_OK(error)) {
 506                         smbd_server_connection_terminate(smb2req->xconn,
 507                                                         nt_errstr(error));
 508                         return;
 509                 }
 510                 return;
 511         }
 512
 513         outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
 514         if (outbody.data == NULL) {
 515                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 516                 if (!NT_STATUS_IS_OK(error)) {
 517                         smbd_server_connection_terminate(smb2req->xconn,
 518                                                         nt_errstr(error));
 519                         return;
 520                 }
 521                 return;
 522         }
 523
 524         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 525         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 526
 527         error = smbd_smb2_request_done(smb2req, outbody, NULL);
 528         if (!NT_STATUS_IS_OK(error)) {
 529                 smbd_server_connection_terminate(smb2req->xconn,
 530                                                 nt_errstr(error));
 531                 return;
 532         }
 533 }
 534
 535 struct smbd_smb2_tdis_state {
 536         struct smbd_smb2_request *smb2req;
 537         struct tevent_queue *wait_queue;
 538 };
 539
 540 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
 541
 542 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 543                                         struct tevent_context *ev,
 544                                         struct smbd_smb2_request *smb2req)
 545 {
 546         struct tevent_req *req;
 547         struct smbd_smb2_tdis_state *state;
 548         struct tevent_req *subreq;
 549         struct smbXsrv_connection *xconn = NULL;
 550
 551         req = tevent_req_create(mem_ctx, &state,
 552                         struct smbd_smb2_tdis_state);
 553         if (req == NULL) {
 554                 return NULL;
 555         }
 556         state->smb2req = smb2req;
 557
 558         state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
 559         if (tevent_req_nomem(state->wait_queue, req)) {
 560                 return tevent_req_post(req, ev);
 561         }
 562
 563         /*
 564          * Make sure that no new request will be able to use this tcon.
 565          */
 566         smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
 567
 568         xconn = smb2req->xconn->client->connections;
 569         for (; xconn != NULL; xconn = xconn->next) {
 570                 struct smbd_smb2_request *preq;
 571
 572                 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
 573                         if (preq == smb2req) {
 574                                 /* Can't cancel current request. */
 575                                 continue;
 576                         }
 577                         if (preq->tcon != smb2req->tcon) {
 578                                 /* Request on different tcon. */
 579                                 continue;
 580                         }
 581
 582                         /*
 583                          * Never cancel anything in a compound
 584                          * request. Way too hard to deal with
 585                          * the result.
 586                          */
 587                         if (!preq->compound_related && preq->subreq != NULL) {
 588                                 tevent_req_cancel(preq->subreq);
 589                         }
 590
 591                         /*
 592                          * Now wait until the request is finished.
 593                          *
 594                          * We don't set a callback, as we just want to block the
 595                          * wait queue and the talloc_free() of the request will
 596                          * remove the item from the wait queue.
 597                          */
 598                         subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
 599                         if (tevent_req_nomem(subreq, req)) {
 600                                 return tevent_req_post(req, ev);
 601                         }
 602                 }
 603         }
 604
 605         /*
 606          * Now we add our own waiter to the end of the queue,
 607          * this way we get notified when all pending requests are finished
 608          * and send to the socket.
 609          */
 610         subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
 611         if (tevent_req_nomem(subreq, req)) {
 612                 return tevent_req_post(req, ev);
 613         }
 614         tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
 615
 616         return req;
 617 }
 618
 619 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
 620 {
 621         struct tevent_req *req = tevent_req_callback_data(
 622                 subreq, struct tevent_req);
 623         struct smbd_smb2_tdis_state *state = tevent_req_data(
 624                 req, struct smbd_smb2_tdis_state);
 625         NTSTATUS status;
 626
 627         tevent_queue_wait_recv(subreq);
 628         TALLOC_FREE(subreq);
 629
 630         /*
 631          * As we've been awoken, we may have changed
 632          * uid in the meantime. Ensure we're still
 633          * root (SMB2_OP_TDIS has .as_root = true).
 634          */
 635         change_to_root_user();
 636
 637         status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
 638                                          state->smb2req->tcon->compat->vuid);
 639         if (tevent_req_nterror(req, status)) {
 640                 return;
 641         }
 642
 643         /* We did tear down the tcon. */
 644         TALLOC_FREE(state->smb2req->tcon);
 645         tevent_req_done(req);
 646 }
 647
 648 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
 649 {
 650         return tevent_req_simple_recv_ntstatus(req);
 651 }