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                                         uint16_t in_flags,
  37                                         const char *in_path);
  38 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
  39                                             uint8_t *out_share_type,
  40                                             uint32_t *out_share_flags,
  41                                             uint32_t *out_capabilities,
  42                                             uint32_t *out_maximal_access,
  43                                             uint32_t *out_tree_id,
  44                                             bool *disconnect);
  45
  46 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
  47
  48 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
  49 {
  50         struct smbXsrv_connection *xconn = req->xconn;
  51         const uint8_t *inbody;
  52         uint16_t in_flags;
  53         uint16_t in_path_offset;
  54         uint16_t in_path_length;
  55         DATA_BLOB in_path_buffer;
  56         char *in_path_string;
  57         size_t in_path_string_size;
  58         NTSTATUS status;
  59         bool ok;
  60         struct tevent_req *subreq;
  61
  62         status = smbd_smb2_request_verify_sizes(req, 0x09);
  63         if (!NT_STATUS_IS_OK(status)) {
  64                 return smbd_smb2_request_error(req, status);
  65         }
  66         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  67
  68         if (xconn->protocol >= PROTOCOL_SMB3_11) {
  69                 in_flags = SVAL(inbody, 0x02);
  70         } else {
  71                 in_flags = 0;
  72         }
  73         in_path_offset = SVAL(inbody, 0x04);
  74         in_path_length = SVAL(inbody, 0x06);
  75
  76         if (in_path_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  77                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  78         }
  79
  80         if (in_path_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  81                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  82         }
  83
  84         in_path_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  85         in_path_buffer.length = in_path_length;
  86
  87         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
  88                                    in_path_buffer.data,
  89                                    in_path_buffer.length,
  90                                    &in_path_string,
  91                                    &in_path_string_size);
  92         if (!ok) {
  93                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
  94         }
  95
  96         if (in_path_buffer.length == 0) {
  97                 in_path_string_size = 0;
  98         }
  99
 100         if (strlen(in_path_string) != in_path_string_size) {
 101                 return smbd_smb2_request_error(req, NT_STATUS_BAD_NETWORK_NAME);
 102         }
 103
 104         subreq = smbd_smb2_tree_connect_send(req,
 105                                              req->sconn->ev_ctx,
 106                                              req,
 107                                              in_flags,
 108                                              in_path_string);
 109         if (subreq == NULL) {
 110                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 111         }
 112         tevent_req_set_callback(subreq, smbd_smb2_request_tcon_done, req);
 113
 114         /*
 115          * Avoid sending a STATUS_PENDING message, it's very likely
 116          * the client won't expect that.
 117          */
 118         return smbd_smb2_request_pending_queue(req, subreq, 0);
 119 }
 120
 121 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
 122 {
 123         struct smbd_smb2_request *req =
 124                 tevent_req_callback_data(subreq,
 125                 struct smbd_smb2_request);
 126         uint8_t *outhdr;
 127         DATA_BLOB outbody;
 128         uint8_t out_share_type = 0;
 129         uint32_t out_share_flags = 0;
 130         uint32_t out_capabilities = 0;
 131         uint32_t out_maximal_access = 0;
 132         uint32_t out_tree_id = 0;
 133         bool disconnect = false;
 134         NTSTATUS status;
 135         NTSTATUS error;
 136
 137         status = smbd_smb2_tree_connect_recv(subreq,
 138                                              &out_share_type,
 139                                              &out_share_flags,
 140                                              &out_capabilities,
 141                                              &out_maximal_access,
 142                                              &out_tree_id,
 143                                              &disconnect);
 144         TALLOC_FREE(subreq);
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 if (disconnect) {
 147                         smbd_server_connection_terminate(req->xconn,
 148                                                          nt_errstr(status));
 149                         return;
 150                 }
 151                 error = smbd_smb2_request_error(req, status);
 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         outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
 161
 162         outbody = smbd_smb2_generate_outbody(req, 0x10);
 163         if (outbody.data == NULL) {
 164                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 165                 if (!NT_STATUS_IS_OK(error)) {
 166                         smbd_server_connection_terminate(req->xconn,
 167                                                          nt_errstr(error));
 168                         return;
 169                 }
 170                 return;
 171         }
 172
 173         SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
 174
 175         SSVAL(outbody.data, 0x00, 0x10);        /* struct size */
 176         SCVAL(outbody.data, 0x02,
 177               out_share_type);                  /* share type */
 178         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 179         SIVAL(outbody.data, 0x04,
 180               out_share_flags);                 /* share flags */
 181         SIVAL(outbody.data, 0x08,
 182               out_capabilities);                /* capabilities */
 183         SIVAL(outbody.data, 0x0C,
 184               out_maximal_access);              /* maximal access */
 185
 186         error = smbd_smb2_request_done(req, outbody, NULL);
 187         if (!NT_STATUS_IS_OK(error)) {
 188                 smbd_server_connection_terminate(req->xconn,
 189                                                  nt_errstr(error));
 190                 return;
 191         }
 192 }
 193
 194 static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
 195                                        const char *in_path,
 196                                        uint8_t *out_share_type,
 197                                        uint32_t *out_share_flags,
 198                                        uint32_t *out_capabilities,
 199                                        uint32_t *out_maximal_access,
 200                                        uint32_t *out_tree_id,
 201                                        bool *disconnect)
 202 {
 203         const struct loadparm_substitution *lp_sub =
 204                 loadparm_s3_global_substitution();
 205         struct smbXsrv_connection *conn = req->xconn;
 206         struct smbXsrv_session *session = req->session;
 207         struct auth_session_info *session_info =
 208                 session->global->auth_session_info;
 209         const char *share = in_path;
 210         char *service = NULL;
 211         int snum = -1;
 212         struct smbXsrv_tcon *tcon;
 213         NTTIME now = timeval_to_nttime(&req->request_time);
 214         connection_struct *compat_conn = NULL;
 215         NTSTATUS status;
 216         bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
 217         bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
 218         bool guest_session = false;
 219         bool require_signed_tcon = false;
 220
 221         *disconnect = false;
 222
 223         if (strncmp(share, "\\\\", 2) == 0) {
 224                 const char *p = strchr(share+2, '\\');
 225                 if (p) {
 226                         share = p + 1;
 227                 }
 228         }
 229
 230         DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
 231                   in_path, share));
 232
 233         if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
 234                 guest_session = true;
 235         }
 236
 237         if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
 238                 require_signed_tcon = true;
 239         }
 240
 241         if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
 242                 DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
 243                           "[%s] as '%s\\%s' without encryption or signing. "
 244                           "Disconnecting.\n",
 245                           share,
 246                           req->session->global->auth_session_info->info->domain_name,
 247                           req->session->global->auth_session_info->info->account_name));
 248                 *disconnect = true;
 249                 return NT_STATUS_ACCESS_DENIED;
 250         }
 251
 252         service = talloc_strdup(talloc_tos(), share);
 253         if(!service) {
 254                 return NT_STATUS_NO_MEMORY;
 255         }
 256
 257         if (!strlower_m(service)) {
 258                 DEBUG(2, ("strlower_m %s failed\n", service));
 259                 return NT_STATUS_INVALID_PARAMETER;
 260         }
 261
 262         /* TODO: do more things... */
 263         if (strequal(service,HOMES_NAME)) {
 264                 if (session->homes_snum == -1) {
 265                         DEBUG(2, ("[homes] share not available for "
 266                                 "user %s because it was not found "
 267                                 "or created at session setup "
 268                                 "time\n",
 269                                 session_info->unix_info->unix_name));
 270                         return NT_STATUS_BAD_NETWORK_NAME;
 271                 }
 272                 snum = session->homes_snum;
 273         } else if ((session->homes_snum != -1)
 274                    && strequal(service,
 275                         lp_servicename(talloc_tos(), lp_sub, session->homes_snum))) {
 276                 snum = session->homes_snum;
 277         } else {
 278                 snum = find_service(talloc_tos(), service, &service);
 279                 if (!service) {
 280                         return NT_STATUS_NO_MEMORY;
 281                 }
 282         }
 283
 284         if (snum < 0) {
 285                 DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
 286                          service));
 287                 return NT_STATUS_BAD_NETWORK_NAME;
 288         }
 289
 290         /* Handle non-DFS clients attempting connections to msdfs proxy */
 291         if (lp_host_msdfs()) {
 292                 char *proxy = lp_msdfs_proxy(talloc_tos(), lp_sub, snum);
 293
 294                 if ((proxy != NULL) && (*proxy != '\0')) {
 295                         DBG_NOTICE("refusing connection to dfs proxy share "
 296                                    "'%s' (pointing to %s)\n",
 297                                    service,
 298                                    proxy);
 299                         TALLOC_FREE(proxy);
 300                         return NT_STATUS_BAD_NETWORK_NAME;
 301                 }
 302                 TALLOC_FREE(proxy);
 303         }
 304
 305         if ((lp_server_smb_encrypt(snum) >= SMB_ENCRYPTION_DESIRED) &&
 306             (conn->smb2.server.cipher != 0))
 307         {
 308                 encryption_desired = true;
 309         }
 310
 311         if (lp_server_smb_encrypt(snum) == SMB_ENCRYPTION_REQUIRED) {
 312                 encryption_desired = true;
 313                 encryption_required = true;
 314         }
 315
 316         if (guest_session && encryption_required) {
 317                 DEBUG(1,("reject guest as encryption is required for service %s\n",
 318                          service));
 319                 return NT_STATUS_ACCESS_DENIED;
 320         }
 321
 322         if (conn->smb2.server.cipher == 0) {
 323                 if (encryption_required) {
 324                         DEBUG(1,("reject tcon with dialect[0x%04X] "
 325                                  "as encryption is required for service %s\n",
 326                                  conn->smb2.server.dialect, service));
 327                         return NT_STATUS_ACCESS_DENIED;
 328                 }
 329         }
 330
 331         /* create a new tcon as child of the session */
 332         status = smb2srv_tcon_create(req->session, now, &tcon);
 333         if (!NT_STATUS_IS_OK(status)) {
 334                 return status;
 335         }
 336
 337         if (encryption_desired) {
 338                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
 339         }
 340         if (encryption_required) {
 341                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
 342         }
 343
 344         compat_conn = make_connection_smb2(req,
 345                                         tcon, snum,
 346                                         "???",
 347                                         &status);
 348         if (compat_conn == NULL) {
 349                 TALLOC_FREE(tcon);
 350                 return status;
 351         }
 352
 353         tcon->global->share_name = lp_servicename(tcon->global,
 354                                                   lp_sub,
 355                                                   SNUM(compat_conn));
 356         if (tcon->global->share_name == NULL) {
 357                 conn_free(compat_conn);
 358                 TALLOC_FREE(tcon);
 359                 return NT_STATUS_NO_MEMORY;
 360         }
 361         tcon->global->session_global_id =
 362                 req->session->global->session_global_id;
 363
 364         tcon->compat = talloc_move(tcon, &compat_conn);
 365
 366         tcon->status = NT_STATUS_OK;
 367
 368         status = smbXsrv_tcon_update(tcon);
 369         if (!NT_STATUS_IS_OK(status)) {
 370                 TALLOC_FREE(tcon);
 371                 return status;
 372         }
 373
 374         if (IS_PRINT(tcon->compat)) {
 375                 *out_share_type = SMB2_SHARE_TYPE_PRINT;
 376         } else if (IS_IPC(tcon->compat)) {
 377                 *out_share_type = SMB2_SHARE_TYPE_PIPE;
 378         } else {
 379                 *out_share_type = SMB2_SHARE_TYPE_DISK;
 380         }
 381
 382         *out_share_flags = 0;
 383
 384         if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
 385                 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
 386                 *out_capabilities = SMB2_SHARE_CAP_DFS;
 387         } else {
 388                 *out_capabilities = 0;
 389         }
 390
 391         switch(lp_csc_policy(SNUM(tcon->compat))) {
 392         case CSC_POLICY_MANUAL:
 393                 break;
 394         case CSC_POLICY_DOCUMENTS:
 395                 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
 396                 break;
 397         case CSC_POLICY_PROGRAMS:
 398                 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
 399                 break;
 400         case CSC_POLICY_DISABLE:
 401                 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
 402                 break;
 403         default:
 404                 break;
 405         }
 406
 407         if (lp_hide_unreadable(SNUM(tcon->compat)) ||
 408             lp_hide_unwriteable_files(SNUM(tcon->compat))) {
 409                 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
 410         }
 411
 412         if (encryption_desired) {
 413                 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
 414         }
 415
 416         *out_maximal_access = tcon->compat->share_access;
 417
 418         *out_tree_id = tcon->global->tcon_wire_id;
 419         req->last_tid = tcon->global->tcon_wire_id;
 420
 421         return NT_STATUS_OK;
 422 }
 423
 424 struct smbd_smb2_tree_connect_state {
 425         const char *in_path;
 426         uint8_t out_share_type;
 427         uint32_t out_share_flags;
 428         uint32_t out_capabilities;
 429         uint32_t out_maximal_access;
 430         uint32_t out_tree_id;
 431         bool disconnect;
 432 };
 433
 434 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
 435                                         struct tevent_context *ev,
 436                                         struct smbd_smb2_request *smb2req,
 437                                         uint16_t in_flags,
 438                                         const char *in_path)
 439 {
 440         struct tevent_req *req;
 441         struct smbd_smb2_tree_connect_state *state;
 442         NTSTATUS status;
 443
 444         req = tevent_req_create(mem_ctx, &state,
 445                                 struct smbd_smb2_tree_connect_state);
 446         if (req == NULL) {
 447                 return NULL;
 448         }
 449         state->in_path = in_path;
 450
 451         status = smbd_smb2_tree_connect(smb2req,
 452                                         state->in_path,
 453                                         &state->out_share_type,
 454                                         &state->out_share_flags,
 455                                         &state->out_capabilities,
 456                                         &state->out_maximal_access,
 457                                         &state->out_tree_id,
 458                                         &state->disconnect);
 459         if (tevent_req_nterror(req, status)) {
 460                 return tevent_req_post(req, ev);
 461         }
 462
 463         tevent_req_done(req);
 464         return tevent_req_post(req, ev);
 465 }
 466
 467 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
 468                                             uint8_t *out_share_type,
 469                                             uint32_t *out_share_flags,
 470                                             uint32_t *out_capabilities,
 471                                             uint32_t *out_maximal_access,
 472                                             uint32_t *out_tree_id,
 473                                             bool *disconnect)
 474 {
 475         struct smbd_smb2_tree_connect_state *state =
 476                 tevent_req_data(req,
 477                 struct smbd_smb2_tree_connect_state);
 478         NTSTATUS status;
 479
 480         if (tevent_req_is_nterror(req, &status)) {
 481                 tevent_req_received(req);
 482                 return status;
 483         }
 484
 485         *out_share_type = state->out_share_type;
 486         *out_share_flags = state->out_share_flags;
 487         *out_capabilities = state->out_capabilities;
 488         *out_maximal_access = state->out_maximal_access;
 489         *out_tree_id = state->out_tree_id;
 490         *disconnect = state->disconnect;
 491
 492         tevent_req_received(req);
 493         return NT_STATUS_OK;
 494 }
 495
 496 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 497                                         struct tevent_context *ev,
 498                                         struct smbd_smb2_request *smb2req);
 499 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
 500 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
 501
 502 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
 503 {
 504         NTSTATUS status;
 505         struct tevent_req *subreq = NULL;
 506
 507         status = smbd_smb2_request_verify_sizes(req, 0x04);
 508         if (!NT_STATUS_IS_OK(status)) {
 509                 return smbd_smb2_request_error(req, status);
 510         }
 511
 512         subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
 513         if (subreq == NULL) {
 514                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 515         }
 516         tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
 517
 518         /*
 519          * Avoid sending a STATUS_PENDING message, it's very likely
 520          * the client won't expect that.
 521          */
 522         return smbd_smb2_request_pending_queue(req, subreq, 0);
 523 }
 524
 525 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
 526 {
 527         struct smbd_smb2_request *smb2req =
 528                 tevent_req_callback_data(subreq,
 529                 struct smbd_smb2_request);
 530         DATA_BLOB outbody;
 531         NTSTATUS status;
 532         NTSTATUS error;
 533
 534         status = smbd_smb2_tdis_recv(subreq);
 535         TALLOC_FREE(subreq);
 536         if (!NT_STATUS_IS_OK(status)) {
 537                 error = smbd_smb2_request_error(smb2req, status);
 538                 if (!NT_STATUS_IS_OK(error)) {
 539                         smbd_server_connection_terminate(smb2req->xconn,
 540                                                         nt_errstr(error));
 541                         return;
 542                 }
 543                 return;
 544         }
 545
 546         outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
 547         if (outbody.data == NULL) {
 548                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 549                 if (!NT_STATUS_IS_OK(error)) {
 550                         smbd_server_connection_terminate(smb2req->xconn,
 551                                                         nt_errstr(error));
 552                         return;
 553                 }
 554                 return;
 555         }
 556
 557         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 558         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 559
 560         error = smbd_smb2_request_done(smb2req, outbody, NULL);
 561         if (!NT_STATUS_IS_OK(error)) {
 562                 smbd_server_connection_terminate(smb2req->xconn,
 563                                                 nt_errstr(error));
 564                 return;
 565         }
 566 }
 567
 568 struct smbd_smb2_tdis_state {
 569         struct smbd_smb2_request *smb2req;
 570         struct tevent_queue *wait_queue;
 571 };
 572
 573 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
 574
 575 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 576                                         struct tevent_context *ev,
 577                                         struct smbd_smb2_request *smb2req)
 578 {
 579         struct tevent_req *req;
 580         struct smbd_smb2_tdis_state *state;
 581         struct tevent_req *subreq;
 582         struct smbXsrv_connection *xconn = NULL;
 583
 584         req = tevent_req_create(mem_ctx, &state,
 585                         struct smbd_smb2_tdis_state);
 586         if (req == NULL) {
 587                 return NULL;
 588         }
 589         state->smb2req = smb2req;
 590
 591         state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
 592         if (tevent_req_nomem(state->wait_queue, req)) {
 593                 return tevent_req_post(req, ev);
 594         }
 595
 596         /*
 597          * Make sure that no new request will be able to use this tcon.
 598          */
 599         smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
 600
 601         xconn = smb2req->xconn->client->connections;
 602         for (; xconn != NULL; xconn = xconn->next) {
 603                 struct smbd_smb2_request *preq;
 604
 605                 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
 606                         if (preq == smb2req) {
 607                                 /* Can't cancel current request. */
 608                                 continue;
 609                         }
 610                         if (preq->tcon != smb2req->tcon) {
 611                                 /* Request on different tcon. */
 612                                 continue;
 613                         }
 614
 615                         if (preq->subreq != NULL) {
 616                                 tevent_req_cancel(preq->subreq);
 617                         }
 618
 619                         /*
 620                          * Now wait until the request is finished.
 621                          *
 622                          * We don't set a callback, as we just want to block the
 623                          * wait queue and the talloc_free() of the request will
 624                          * remove the item from the wait queue.
 625                          */
 626                         subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
 627                         if (tevent_req_nomem(subreq, req)) {
 628                                 return tevent_req_post(req, ev);
 629                         }
 630                 }
 631         }
 632
 633         /*
 634          * Now we add our own waiter to the end of the queue,
 635          * this way we get notified when all pending requests are finished
 636          * and send to the socket.
 637          */
 638         subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
 639         if (tevent_req_nomem(subreq, req)) {
 640                 return tevent_req_post(req, ev);
 641         }
 642         tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
 643
 644         return req;
 645 }
 646
 647 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
 648 {
 649         struct tevent_req *req = tevent_req_callback_data(
 650                 subreq, struct tevent_req);
 651         struct smbd_smb2_tdis_state *state = tevent_req_data(
 652                 req, struct smbd_smb2_tdis_state);
 653         NTSTATUS status;
 654
 655         tevent_queue_wait_recv(subreq);
 656         TALLOC_FREE(subreq);
 657
 658         /*
 659          * As we've been awoken, we may have changed
 660          * uid in the meantime. Ensure we're still
 661          * root (SMB2_OP_TDIS has .as_root = true).
 662          */
 663         change_to_root_user();
 664
 665         status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
 666                                          state->smb2req->tcon->compat->vuid);
 667         if (tevent_req_nterror(req, status)) {
 668                 return;
 669         }
 670
 671         /* We did tear down the tcon. */
 672         TALLOC_FREE(state->smb2req->tcon);
 673         tevent_req_done(req);
 674 }
 675
 676 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
 677 {
 678         return tevent_req_simple_recv_ntstatus(req);
 679 }