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 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
  31                                         struct tevent_context *ev,
  32                                         struct smbd_smb2_request *smb2req,
  33                                         const char *in_path);
  34 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
  35                                             uint8_t *out_share_type,
  36                                             uint32_t *out_share_flags,
  37                                             uint32_t *out_capabilities,
  38                                             uint32_t *out_maximal_access,
  39                                             uint32_t *out_tree_id,
  40                                             bool *disconnect);
  41
  42 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
  43
  44 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
  45 {
  46         const uint8_t *inbody;
  47         uint16_t in_path_offset;
  48         uint16_t in_path_length;
  49         DATA_BLOB in_path_buffer;
  50         char *in_path_string;
  51         size_t in_path_string_size;
  52         NTSTATUS status;
  53         bool ok;
  54         struct tevent_req *subreq;
  55
  56         status = smbd_smb2_request_verify_sizes(req, 0x09);
  57         if (!NT_STATUS_IS_OK(status)) {
  58                 return smbd_smb2_request_error(req, status);
  59         }
  60         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  61
  62         in_path_offset = SVAL(inbody, 0x04);
  63         in_path_length = SVAL(inbody, 0x06);
  64
  65         if (in_path_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  66                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  67         }
  68
  69         if (in_path_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  70                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  71         }
  72
  73         in_path_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  74         in_path_buffer.length = in_path_length;
  75
  76         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
  77                                    in_path_buffer.data,
  78                                    in_path_buffer.length,
  79                                    &in_path_string,
  80                                    &in_path_string_size);
  81         if (!ok) {
  82                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
  83         }
  84
  85         if (in_path_buffer.length == 0) {
  86                 in_path_string_size = 0;
  87         }
  88
  89         if (strlen(in_path_string) != in_path_string_size) {
  90                 return smbd_smb2_request_error(req, NT_STATUS_BAD_NETWORK_NAME);
  91         }
  92
  93         subreq = smbd_smb2_tree_connect_send(req,
  94                                              req->sconn->ev_ctx,
  95                                              req,
  96                                              in_path_string);
  97         if (subreq == NULL) {
  98                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
  99         }
 100         tevent_req_set_callback(subreq, smbd_smb2_request_tcon_done, req);
 101
 102         return smbd_smb2_request_pending_queue(req, subreq, 500);
 103 }
 104
 105 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
 106 {
 107         struct smbd_smb2_request *req =
 108                 tevent_req_callback_data(subreq,
 109                 struct smbd_smb2_request);
 110         uint8_t *outhdr;
 111         DATA_BLOB outbody;
 112         uint8_t out_share_type = 0;
 113         uint32_t out_share_flags = 0;
 114         uint32_t out_capabilities = 0;
 115         uint32_t out_maximal_access = 0;
 116         uint32_t out_tree_id = 0;
 117         bool disconnect = false;
 118         NTSTATUS status;
 119         NTSTATUS error;
 120
 121         status = smbd_smb2_tree_connect_recv(subreq,
 122                                              &out_share_type,
 123                                              &out_share_flags,
 124                                              &out_capabilities,
 125                                              &out_maximal_access,
 126                                              &out_tree_id,
 127                                              &disconnect);
 128         TALLOC_FREE(subreq);
 129         if (!NT_STATUS_IS_OK(status)) {
 130                 if (disconnect) {
 131                         smbd_server_connection_terminate(req->xconn,
 132                                                          nt_errstr(status));
 133                         return;
 134                 }
 135                 error = smbd_smb2_request_error(req, status);
 136                 if (!NT_STATUS_IS_OK(error)) {
 137                         smbd_server_connection_terminate(req->xconn,
 138                                                          nt_errstr(error));
 139                         return;
 140                 }
 141                 return;
 142         }
 143
 144         outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
 145
 146         outbody = smbd_smb2_generate_outbody(req, 0x10);
 147         if (outbody.data == NULL) {
 148                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 149                 if (!NT_STATUS_IS_OK(error)) {
 150                         smbd_server_connection_terminate(req->xconn,
 151                                                          nt_errstr(error));
 152                         return;
 153                 }
 154                 return;
 155         }
 156
 157         SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
 158
 159         SSVAL(outbody.data, 0x00, 0x10);        /* struct size */
 160         SCVAL(outbody.data, 0x02,
 161               out_share_type);                  /* share type */
 162         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 163         SIVAL(outbody.data, 0x04,
 164               out_share_flags);                 /* share flags */
 165         SIVAL(outbody.data, 0x08,
 166               out_capabilities);                /* capabilities */
 167         SIVAL(outbody.data, 0x0C,
 168               out_maximal_access);              /* maximal access */
 169
 170         error = smbd_smb2_request_done(req, outbody, NULL);
 171         if (!NT_STATUS_IS_OK(error)) {
 172                 smbd_server_connection_terminate(req->xconn,
 173                                                  nt_errstr(error));
 174                 return;
 175         }
 176 }
 177
 178 static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
 179                                        const char *in_path,
 180                                        uint8_t *out_share_type,
 181                                        uint32_t *out_share_flags,
 182                                        uint32_t *out_capabilities,
 183                                        uint32_t *out_maximal_access,
 184                                        uint32_t *out_tree_id,
 185                                        bool *disconnect)
 186 {
 187         struct smbXsrv_connection *conn = req->xconn;
 188         const char *share = in_path;
 189         char *service = NULL;
 190         int snum = -1;
 191         struct smbXsrv_tcon *tcon;
 192         NTTIME now = timeval_to_nttime(&req->request_time);
 193         connection_struct *compat_conn = NULL;
 194         struct user_struct *compat_vuser = req->session->compat;
 195         NTSTATUS status;
 196         bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
 197         bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
 198         bool guest_session = false;
 199         bool require_signed_tcon = false;
 200
 201         *disconnect = false;
 202
 203         if (strncmp(share, "\\\\", 2) == 0) {
 204                 const char *p = strchr(share+2, '\\');
 205                 if (p) {
 206                         share = p + 1;
 207                 }
 208         }
 209
 210         DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
 211                   in_path, share));
 212
 213         if (security_session_user_level(compat_vuser->session_info, NULL) < SECURITY_USER) {
 214                 guest_session = true;
 215         }
 216
 217         if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
 218                 require_signed_tcon = true;
 219         }
 220
 221         if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
 222                 DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
 223                           "[%s] as '%s\\%s' without encryption or signing. "
 224                           "Disconnecting.\n",
 225                           share,
 226                           req->session->global->auth_session_info->info->domain_name,
 227                           req->session->global->auth_session_info->info->account_name));
 228                 *disconnect = true;
 229                 return NT_STATUS_ACCESS_DENIED;
 230         }
 231
 232         service = talloc_strdup(talloc_tos(), share);
 233         if(!service) {
 234                 return NT_STATUS_NO_MEMORY;
 235         }
 236
 237         if (!strlower_m(service)) {
 238                 DEBUG(2, ("strlower_m %s failed\n", service));
 239                 return NT_STATUS_INVALID_PARAMETER;
 240         }
 241
 242         /* TODO: do more things... */
 243         if (strequal(service,HOMES_NAME)) {
 244                 if (compat_vuser->homes_snum == -1) {
 245                         DEBUG(2, ("[homes] share not available for "
 246                                 "user %s because it was not found "
 247                                 "or created at session setup "
 248                                 "time\n",
 249                                 compat_vuser->session_info->unix_info->unix_name));
 250                         return NT_STATUS_BAD_NETWORK_NAME;
 251                 }
 252                 snum = compat_vuser->homes_snum;
 253         } else if ((compat_vuser->homes_snum != -1)
 254                    && strequal(service,
 255                         lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
 256                 snum = compat_vuser->homes_snum;
 257         } else {
 258                 snum = find_service(talloc_tos(), service, &service);
 259                 if (!service) {
 260                         return NT_STATUS_NO_MEMORY;
 261                 }
 262         }
 263
 264         if (snum < 0) {
 265                 DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
 266                          service));
 267                 return NT_STATUS_BAD_NETWORK_NAME;
 268         }
 269
 270         if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
 271             (conn->smb2.client.capabilities & SMB2_CAP_ENCRYPTION)) {
 272                 encryption_desired = true;
 273         }
 274
 275         if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
 276                 encryption_desired = true;
 277                 encryption_required = true;
 278         }
 279
 280         if (guest_session && encryption_required) {
 281                 DEBUG(1,("reject guest as encryption is required for service %s\n",
 282                          service));
 283                 return NT_STATUS_ACCESS_DENIED;
 284         }
 285
 286         if (conn->smb2.server.cipher == 0) {
 287                 if (encryption_required) {
 288                         DEBUG(1,("reject tcon with dialect[0x%04X] "
 289                                  "as encryption is required for service %s\n",
 290                                  conn->smb2.server.dialect, service));
 291                         return NT_STATUS_ACCESS_DENIED;
 292                 }
 293         }
 294
 295         /* create a new tcon as child of the session */
 296         status = smb2srv_tcon_create(req->session, now, &tcon);
 297         if (!NT_STATUS_IS_OK(status)) {
 298                 return status;
 299         }
 300
 301         if (encryption_desired) {
 302                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
 303         }
 304         if (encryption_required) {
 305                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
 306         }
 307
 308         compat_conn = make_connection_smb2(req,
 309                                         tcon, snum,
 310                                         req->session->compat,
 311                                         "???",
 312                                         &status);
 313         if (compat_conn == NULL) {
 314                 TALLOC_FREE(tcon);
 315                 return status;
 316         }
 317
 318         tcon->global->share_name = lp_servicename(tcon->global,
 319                                                   SNUM(compat_conn));
 320         if (tcon->global->share_name == NULL) {
 321                 conn_free(compat_conn);
 322                 TALLOC_FREE(tcon);
 323                 return NT_STATUS_NO_MEMORY;
 324         }
 325         tcon->global->session_global_id =
 326                 req->session->global->session_global_id;
 327
 328         tcon->compat = talloc_move(tcon, &compat_conn);
 329
 330         tcon->status = NT_STATUS_OK;
 331
 332         status = smbXsrv_tcon_update(tcon);
 333         if (!NT_STATUS_IS_OK(status)) {
 334                 TALLOC_FREE(tcon);
 335                 return status;
 336         }
 337
 338         if (IS_PRINT(tcon->compat)) {
 339                 *out_share_type = SMB2_SHARE_TYPE_PRINT;
 340         } else if (IS_IPC(tcon->compat)) {
 341                 *out_share_type = SMB2_SHARE_TYPE_PIPE;
 342         } else {
 343                 *out_share_type = SMB2_SHARE_TYPE_DISK;
 344         }
 345
 346         *out_share_flags = 0;
 347
 348         if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
 349                 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
 350                 *out_capabilities = SMB2_SHARE_CAP_DFS;
 351         } else {
 352                 *out_capabilities = 0;
 353         }
 354
 355         switch(lp_csc_policy(SNUM(tcon->compat))) {
 356         case CSC_POLICY_MANUAL:
 357                 break;
 358         case CSC_POLICY_DOCUMENTS:
 359                 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
 360                 break;
 361         case CSC_POLICY_PROGRAMS:
 362                 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
 363                 break;
 364         case CSC_POLICY_DISABLE:
 365                 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
 366                 break;
 367         default:
 368                 break;
 369         }
 370
 371         if (lp_hide_unreadable(SNUM(tcon->compat)) ||
 372             lp_hide_unwriteable_files(SNUM(tcon->compat))) {
 373                 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
 374         }
 375
 376         if (encryption_desired) {
 377                 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
 378         }
 379
 380         *out_maximal_access = tcon->compat->share_access;
 381
 382         *out_tree_id = tcon->global->tcon_wire_id;
 383         return NT_STATUS_OK;
 384 }
 385
 386 struct smbd_smb2_tree_connect_state {
 387         const char *in_path;
 388         uint8_t out_share_type;
 389         uint32_t out_share_flags;
 390         uint32_t out_capabilities;
 391         uint32_t out_maximal_access;
 392         uint32_t out_tree_id;
 393         bool disconnect;
 394 };
 395
 396 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
 397                                         struct tevent_context *ev,
 398                                         struct smbd_smb2_request *smb2req,
 399                                         const char *in_path)
 400 {
 401         struct tevent_req *req;
 402         struct smbd_smb2_tree_connect_state *state;
 403         NTSTATUS status;
 404
 405         req = tevent_req_create(mem_ctx, &state,
 406                                 struct smbd_smb2_tree_connect_state);
 407         if (req == NULL) {
 408                 return NULL;
 409         }
 410         state->in_path = in_path;
 411
 412         status = smbd_smb2_tree_connect(smb2req,
 413                                         state->in_path,
 414                                         &state->out_share_type,
 415                                         &state->out_share_flags,
 416                                         &state->out_capabilities,
 417                                         &state->out_maximal_access,
 418                                         &state->out_tree_id,
 419                                         &state->disconnect);
 420         if (tevent_req_nterror(req, status)) {
 421                 return tevent_req_post(req, ev);
 422         }
 423
 424         tevent_req_done(req);
 425         return tevent_req_post(req, ev);
 426 }
 427
 428 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
 429                                             uint8_t *out_share_type,
 430                                             uint32_t *out_share_flags,
 431                                             uint32_t *out_capabilities,
 432                                             uint32_t *out_maximal_access,
 433                                             uint32_t *out_tree_id,
 434                                             bool *disconnect)
 435 {
 436         struct smbd_smb2_tree_connect_state *state =
 437                 tevent_req_data(req,
 438                 struct smbd_smb2_tree_connect_state);
 439         NTSTATUS status;
 440
 441         if (tevent_req_is_nterror(req, &status)) {
 442                 tevent_req_received(req);
 443                 return status;
 444         }
 445
 446         *out_share_type = state->out_share_type;
 447         *out_share_flags = state->out_share_flags;
 448         *out_capabilities = state->out_capabilities;
 449         *out_maximal_access = state->out_maximal_access;
 450         *out_tree_id = state->out_tree_id;
 451         *disconnect = state->disconnect;
 452
 453         tevent_req_received(req);
 454         return NT_STATUS_OK;
 455 }
 456
 457 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 458                                         struct tevent_context *ev,
 459                                         struct smbd_smb2_request *smb2req);
 460 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
 461 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
 462
 463 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
 464 {
 465         NTSTATUS status;
 466         struct tevent_req *subreq = NULL;
 467
 468         status = smbd_smb2_request_verify_sizes(req, 0x04);
 469         if (!NT_STATUS_IS_OK(status)) {
 470                 return smbd_smb2_request_error(req, status);
 471         }
 472
 473         subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
 474         if (subreq == NULL) {
 475                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 476         }
 477         tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
 478
 479         /*
 480          * Wait a long time before going async on this to allow
 481          * requests we're waiting on to finish. Set timeout to 10 secs.
 482          */
 483         return smbd_smb2_request_pending_queue(req, subreq, 10000000);
 484 }
 485
 486 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
 487 {
 488         struct smbd_smb2_request *smb2req =
 489                 tevent_req_callback_data(subreq,
 490                 struct smbd_smb2_request);
 491         DATA_BLOB outbody;
 492         NTSTATUS status;
 493         NTSTATUS error;
 494
 495         status = smbd_smb2_tdis_recv(subreq);
 496         TALLOC_FREE(subreq);
 497         if (!NT_STATUS_IS_OK(status)) {
 498                 error = smbd_smb2_request_error(smb2req, status);
 499                 if (!NT_STATUS_IS_OK(error)) {
 500                         smbd_server_connection_terminate(smb2req->xconn,
 501                                                         nt_errstr(error));
 502                         return;
 503                 }
 504                 return;
 505         }
 506
 507         outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
 508         if (outbody.data == NULL) {
 509                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 510                 if (!NT_STATUS_IS_OK(error)) {
 511                         smbd_server_connection_terminate(smb2req->xconn,
 512                                                         nt_errstr(error));
 513                         return;
 514                 }
 515                 return;
 516         }
 517
 518         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 519         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 520
 521         error = smbd_smb2_request_done(smb2req, outbody, NULL);
 522         if (!NT_STATUS_IS_OK(error)) {
 523                 smbd_server_connection_terminate(smb2req->xconn,
 524                                                 nt_errstr(error));
 525                 return;
 526         }
 527 }
 528
 529 struct smbd_smb2_tdis_state {
 530         struct smbd_smb2_request *smb2req;
 531         struct tevent_queue *wait_queue;
 532 };
 533
 534 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
 535
 536 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 537                                         struct tevent_context *ev,
 538                                         struct smbd_smb2_request *smb2req)
 539 {
 540         struct tevent_req *req;
 541         struct smbd_smb2_tdis_state *state;
 542         struct tevent_req *subreq;
 543         struct smbXsrv_connection *xconn = NULL;
 544
 545         req = tevent_req_create(mem_ctx, &state,
 546                         struct smbd_smb2_tdis_state);
 547         if (req == NULL) {
 548                 return NULL;
 549         }
 550         state->smb2req = smb2req;
 551
 552         state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
 553         if (tevent_req_nomem(state->wait_queue, req)) {
 554                 return tevent_req_post(req, ev);
 555         }
 556
 557         /*
 558          * Make sure that no new request will be able to use this tcon.
 559          */
 560         smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
 561
 562         xconn = smb2req->xconn->client->connections;
 563         for (; xconn != NULL; xconn = xconn->next) {
 564                 struct smbd_smb2_request *preq;
 565
 566                 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
 567                         if (preq == smb2req) {
 568                                 /* Can't cancel current request. */
 569                                 continue;
 570                         }
 571                         if (preq->tcon != smb2req->tcon) {
 572                                 /* Request on different tcon. */
 573                                 continue;
 574                         }
 575
 576                         /*
 577                          * Never cancel anything in a compound
 578                          * request. Way too hard to deal with
 579                          * the result.
 580                          */
 581                         if (!preq->compound_related && preq->subreq != NULL) {
 582                                 tevent_req_cancel(preq->subreq);
 583                         }
 584
 585                         /*
 586                          * Now wait until the request is finished.
 587                          *
 588                          * We don't set a callback, as we just want to block the
 589                          * wait queue and the talloc_free() of the request will
 590                          * remove the item from the wait queue.
 591                          */
 592                         subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
 593                         if (tevent_req_nomem(subreq, req)) {
 594                                 return tevent_req_post(req, ev);
 595                         }
 596                 }
 597         }
 598
 599         /*
 600          * Now we add our own waiter to the end of the queue,
 601          * this way we get notified when all pending requests are finished
 602          * and send to the socket.
 603          */
 604         subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
 605         if (tevent_req_nomem(subreq, req)) {
 606                 return tevent_req_post(req, ev);
 607         }
 608         tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
 609
 610         return req;
 611 }
 612
 613 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
 614 {
 615         struct tevent_req *req = tevent_req_callback_data(
 616                 subreq, struct tevent_req);
 617         struct smbd_smb2_tdis_state *state = tevent_req_data(
 618                 req, struct smbd_smb2_tdis_state);
 619         NTSTATUS status;
 620
 621         tevent_queue_wait_recv(subreq);
 622         TALLOC_FREE(subreq);
 623
 624         /*
 625          * As we've been awoken, we may have changed
 626          * uid in the meantime. Ensure we're still
 627          * root (SMB2_OP_TDIS has .as_root = true).
 628          */
 629         change_to_root_user();
 630
 631         status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
 632                                          state->smb2req->tcon->compat->vuid);
 633         if (tevent_req_nterror(req, status)) {
 634                 return;
 635         }
 636
 637         /* We did tear down the tcon. */
 638         TALLOC_FREE(state->smb2req->tcon);
 639         tevent_req_done(req);
 640 }
 641
 642 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
 643 {
 644         return tevent_req_simple_recv_ntstatus(req);
 645 }