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         /*
 106          * Avoid sending a STATUS_PENDING message, it's very likely
 107          * the client won't expect that.
 108          */
 109         return smbd_smb2_request_pending_queue(req, subreq, 0);
 110 }
 111
 112 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
 113 {
 114         struct smbd_smb2_request *req =
 115                 tevent_req_callback_data(subreq,
 116                 struct smbd_smb2_request);
 117         uint8_t *outhdr;
 118         DATA_BLOB outbody;
 119         uint8_t out_share_type = 0;
 120         uint32_t out_share_flags = 0;
 121         uint32_t out_capabilities = 0;
 122         uint32_t out_maximal_access = 0;
 123         uint32_t out_tree_id = 0;
 124         bool disconnect = false;
 125         NTSTATUS status;
 126         NTSTATUS error;
 127
 128         status = smbd_smb2_tree_connect_recv(subreq,
 129                                              &out_share_type,
 130                                              &out_share_flags,
 131                                              &out_capabilities,
 132                                              &out_maximal_access,
 133                                              &out_tree_id,
 134                                              &disconnect);
 135         TALLOC_FREE(subreq);
 136         if (!NT_STATUS_IS_OK(status)) {
 137                 if (disconnect) {
 138                         smbd_server_connection_terminate(req->xconn,
 139                                                          nt_errstr(status));
 140                         return;
 141                 }
 142                 error = smbd_smb2_request_error(req, status);
 143                 if (!NT_STATUS_IS_OK(error)) {
 144                         smbd_server_connection_terminate(req->xconn,
 145                                                          nt_errstr(error));
 146                         return;
 147                 }
 148                 return;
 149         }
 150
 151         outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
 152
 153         outbody = smbd_smb2_generate_outbody(req, 0x10);
 154         if (outbody.data == NULL) {
 155                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 156                 if (!NT_STATUS_IS_OK(error)) {
 157                         smbd_server_connection_terminate(req->xconn,
 158                                                          nt_errstr(error));
 159                         return;
 160                 }
 161                 return;
 162         }
 163
 164         SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
 165
 166         SSVAL(outbody.data, 0x00, 0x10);        /* struct size */
 167         SCVAL(outbody.data, 0x02,
 168               out_share_type);                  /* share type */
 169         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 170         SIVAL(outbody.data, 0x04,
 171               out_share_flags);                 /* share flags */
 172         SIVAL(outbody.data, 0x08,
 173               out_capabilities);                /* capabilities */
 174         SIVAL(outbody.data, 0x0C,
 175               out_maximal_access);              /* maximal access */
 176
 177         error = smbd_smb2_request_done(req, outbody, NULL);
 178         if (!NT_STATUS_IS_OK(error)) {
 179                 smbd_server_connection_terminate(req->xconn,
 180                                                  nt_errstr(error));
 181                 return;
 182         }
 183 }
 184
 185 static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
 186                                        const char *in_path,
 187                                        uint8_t *out_share_type,
 188                                        uint32_t *out_share_flags,
 189                                        uint32_t *out_capabilities,
 190                                        uint32_t *out_maximal_access,
 191                                        uint32_t *out_tree_id,
 192                                        bool *disconnect)
 193 {
 194         struct smbXsrv_connection *conn = req->xconn;
 195         const char *share = in_path;
 196         char *service = NULL;
 197         int snum = -1;
 198         struct smbXsrv_tcon *tcon;
 199         NTTIME now = timeval_to_nttime(&req->request_time);
 200         connection_struct *compat_conn = NULL;
 201         struct user_struct *compat_vuser = req->session->compat;
 202         NTSTATUS status;
 203         bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
 204         bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
 205         bool guest_session = false;
 206         bool require_signed_tcon = false;
 207
 208         *disconnect = false;
 209
 210         if (strncmp(share, "\\\\", 2) == 0) {
 211                 const char *p = strchr(share+2, '\\');
 212                 if (p) {
 213                         share = p + 1;
 214                 }
 215         }
 216
 217         DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
 218                   in_path, share));
 219
 220         if (security_session_user_level(compat_vuser->session_info, NULL) < SECURITY_USER) {
 221                 guest_session = true;
 222         }
 223
 224         if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
 225                 require_signed_tcon = true;
 226         }
 227
 228         if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
 229                 DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
 230                           "[%s] as '%s\\%s' without encryption or signing. "
 231                           "Disconnecting.\n",
 232                           share,
 233                           req->session->global->auth_session_info->info->domain_name,
 234                           req->session->global->auth_session_info->info->account_name));
 235                 *disconnect = true;
 236                 return NT_STATUS_ACCESS_DENIED;
 237         }
 238
 239         service = talloc_strdup(talloc_tos(), share);
 240         if(!service) {
 241                 return NT_STATUS_NO_MEMORY;
 242         }
 243
 244         if (!strlower_m(service)) {
 245                 DEBUG(2, ("strlower_m %s failed\n", service));
 246                 return NT_STATUS_INVALID_PARAMETER;
 247         }
 248
 249         /* TODO: do more things... */
 250         if (strequal(service,HOMES_NAME)) {
 251                 if (compat_vuser->homes_snum == -1) {
 252                         DEBUG(2, ("[homes] share not available for "
 253                                 "user %s because it was not found "
 254                                 "or created at session setup "
 255                                 "time\n",
 256                                 compat_vuser->session_info->unix_info->unix_name));
 257                         return NT_STATUS_BAD_NETWORK_NAME;
 258                 }
 259                 snum = compat_vuser->homes_snum;
 260         } else if ((compat_vuser->homes_snum != -1)
 261                    && strequal(service,
 262                         lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
 263                 snum = compat_vuser->homes_snum;
 264         } else {
 265                 snum = find_service(talloc_tos(), service, &service);
 266                 if (!service) {
 267                         return NT_STATUS_NO_MEMORY;
 268                 }
 269         }
 270
 271         if (snum < 0) {
 272                 DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
 273                          service));
 274                 return NT_STATUS_BAD_NETWORK_NAME;
 275         }
 276
 277         /* Handle non-DFS clients attempting connections to msdfs proxy */
 278         if (lp_host_msdfs()) {
 279                 char *proxy = lp_msdfs_proxy(talloc_tos(), snum);
 280
 281                 if ((proxy != NULL) && (*proxy != '\0')) {
 282                         DBG_NOTICE("refusing connection to dfs proxy share "
 283                                    "'%s' (pointing to %s)\n",
 284                                    service,
 285                                    proxy);
 286                         TALLOC_FREE(proxy);
 287                         return NT_STATUS_BAD_NETWORK_NAME;
 288                 }
 289                 TALLOC_FREE(proxy);
 290         }
 291
 292         if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
 293             (conn->smb2.server.cipher != 0))
 294         {
 295                 encryption_desired = true;
 296         }
 297
 298         if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
 299                 encryption_desired = true;
 300                 encryption_required = true;
 301         }
 302
 303         if (guest_session && encryption_required) {
 304                 DEBUG(1,("reject guest as encryption is required for service %s\n",
 305                          service));
 306                 return NT_STATUS_ACCESS_DENIED;
 307         }
 308
 309         if (conn->smb2.server.cipher == 0) {
 310                 if (encryption_required) {
 311                         DEBUG(1,("reject tcon with dialect[0x%04X] "
 312                                  "as encryption is required for service %s\n",
 313                                  conn->smb2.server.dialect, service));
 314                         return NT_STATUS_ACCESS_DENIED;
 315                 }
 316         }
 317
 318         /* create a new tcon as child of the session */
 319         status = smb2srv_tcon_create(req->session, now, &tcon);
 320         if (!NT_STATUS_IS_OK(status)) {
 321                 return status;
 322         }
 323
 324         if (encryption_desired) {
 325                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
 326         }
 327         if (encryption_required) {
 328                 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
 329         }
 330
 331         compat_conn = make_connection_smb2(req,
 332                                         tcon, snum,
 333                                         req->session->compat,
 334                                         "???",
 335                                         &status);
 336         if (compat_conn == NULL) {
 337                 TALLOC_FREE(tcon);
 338                 return status;
 339         }
 340
 341         tcon->global->share_name = lp_servicename(tcon->global,
 342                                                   SNUM(compat_conn));
 343         if (tcon->global->share_name == NULL) {
 344                 conn_free(compat_conn);
 345                 TALLOC_FREE(tcon);
 346                 return NT_STATUS_NO_MEMORY;
 347         }
 348         tcon->global->session_global_id =
 349                 req->session->global->session_global_id;
 350
 351         tcon->compat = talloc_move(tcon, &compat_conn);
 352
 353         tcon->status = NT_STATUS_OK;
 354
 355         status = smbXsrv_tcon_update(tcon);
 356         if (!NT_STATUS_IS_OK(status)) {
 357                 TALLOC_FREE(tcon);
 358                 return status;
 359         }
 360
 361         if (IS_PRINT(tcon->compat)) {
 362                 *out_share_type = SMB2_SHARE_TYPE_PRINT;
 363         } else if (IS_IPC(tcon->compat)) {
 364                 *out_share_type = SMB2_SHARE_TYPE_PIPE;
 365         } else {
 366                 *out_share_type = SMB2_SHARE_TYPE_DISK;
 367         }
 368
 369         *out_share_flags = 0;
 370
 371         if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
 372                 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
 373                 *out_capabilities = SMB2_SHARE_CAP_DFS;
 374         } else {
 375                 *out_capabilities = 0;
 376         }
 377
 378         switch(lp_csc_policy(SNUM(tcon->compat))) {
 379         case CSC_POLICY_MANUAL:
 380                 break;
 381         case CSC_POLICY_DOCUMENTS:
 382                 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
 383                 break;
 384         case CSC_POLICY_PROGRAMS:
 385                 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
 386                 break;
 387         case CSC_POLICY_DISABLE:
 388                 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
 389                 break;
 390         default:
 391                 break;
 392         }
 393
 394         if (lp_hide_unreadable(SNUM(tcon->compat)) ||
 395             lp_hide_unwriteable_files(SNUM(tcon->compat))) {
 396                 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
 397         }
 398
 399         if (encryption_desired) {
 400                 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
 401         }
 402
 403         *out_maximal_access = tcon->compat->share_access;
 404
 405         *out_tree_id = tcon->global->tcon_wire_id;
 406         req->last_tid = tcon->global->tcon_wire_id;
 407
 408         return NT_STATUS_OK;
 409 }
 410
 411 struct smbd_smb2_tree_connect_state {
 412         const char *in_path;
 413         uint8_t out_share_type;
 414         uint32_t out_share_flags;
 415         uint32_t out_capabilities;
 416         uint32_t out_maximal_access;
 417         uint32_t out_tree_id;
 418         bool disconnect;
 419 };
 420
 421 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
 422                                         struct tevent_context *ev,
 423                                         struct smbd_smb2_request *smb2req,
 424                                         const char *in_path)
 425 {
 426         struct tevent_req *req;
 427         struct smbd_smb2_tree_connect_state *state;
 428         NTSTATUS status;
 429
 430         req = tevent_req_create(mem_ctx, &state,
 431                                 struct smbd_smb2_tree_connect_state);
 432         if (req == NULL) {
 433                 return NULL;
 434         }
 435         state->in_path = in_path;
 436
 437         status = smbd_smb2_tree_connect(smb2req,
 438                                         state->in_path,
 439                                         &state->out_share_type,
 440                                         &state->out_share_flags,
 441                                         &state->out_capabilities,
 442                                         &state->out_maximal_access,
 443                                         &state->out_tree_id,
 444                                         &state->disconnect);
 445         if (tevent_req_nterror(req, status)) {
 446                 return tevent_req_post(req, ev);
 447         }
 448
 449         tevent_req_done(req);
 450         return tevent_req_post(req, ev);
 451 }
 452
 453 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
 454                                             uint8_t *out_share_type,
 455                                             uint32_t *out_share_flags,
 456                                             uint32_t *out_capabilities,
 457                                             uint32_t *out_maximal_access,
 458                                             uint32_t *out_tree_id,
 459                                             bool *disconnect)
 460 {
 461         struct smbd_smb2_tree_connect_state *state =
 462                 tevent_req_data(req,
 463                 struct smbd_smb2_tree_connect_state);
 464         NTSTATUS status;
 465
 466         if (tevent_req_is_nterror(req, &status)) {
 467                 tevent_req_received(req);
 468                 return status;
 469         }
 470
 471         *out_share_type = state->out_share_type;
 472         *out_share_flags = state->out_share_flags;
 473         *out_capabilities = state->out_capabilities;
 474         *out_maximal_access = state->out_maximal_access;
 475         *out_tree_id = state->out_tree_id;
 476         *disconnect = state->disconnect;
 477
 478         tevent_req_received(req);
 479         return NT_STATUS_OK;
 480 }
 481
 482 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 483                                         struct tevent_context *ev,
 484                                         struct smbd_smb2_request *smb2req);
 485 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
 486 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
 487
 488 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
 489 {
 490         NTSTATUS status;
 491         struct tevent_req *subreq = NULL;
 492
 493         status = smbd_smb2_request_verify_sizes(req, 0x04);
 494         if (!NT_STATUS_IS_OK(status)) {
 495                 return smbd_smb2_request_error(req, status);
 496         }
 497
 498         subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
 499         if (subreq == NULL) {
 500                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 501         }
 502         tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
 503
 504         /*
 505          * Avoid sending a STATUS_PENDING message, it's very likely
 506          * the client won't expect that.
 507          */
 508         return smbd_smb2_request_pending_queue(req, subreq, 0);
 509 }
 510
 511 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
 512 {
 513         struct smbd_smb2_request *smb2req =
 514                 tevent_req_callback_data(subreq,
 515                 struct smbd_smb2_request);
 516         DATA_BLOB outbody;
 517         NTSTATUS status;
 518         NTSTATUS error;
 519
 520         status = smbd_smb2_tdis_recv(subreq);
 521         TALLOC_FREE(subreq);
 522         if (!NT_STATUS_IS_OK(status)) {
 523                 error = smbd_smb2_request_error(smb2req, status);
 524                 if (!NT_STATUS_IS_OK(error)) {
 525                         smbd_server_connection_terminate(smb2req->xconn,
 526                                                         nt_errstr(error));
 527                         return;
 528                 }
 529                 return;
 530         }
 531
 532         outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
 533         if (outbody.data == NULL) {
 534                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 535                 if (!NT_STATUS_IS_OK(error)) {
 536                         smbd_server_connection_terminate(smb2req->xconn,
 537                                                         nt_errstr(error));
 538                         return;
 539                 }
 540                 return;
 541         }
 542
 543         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 544         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 545
 546         error = smbd_smb2_request_done(smb2req, outbody, NULL);
 547         if (!NT_STATUS_IS_OK(error)) {
 548                 smbd_server_connection_terminate(smb2req->xconn,
 549                                                 nt_errstr(error));
 550                 return;
 551         }
 552 }
 553
 554 struct smbd_smb2_tdis_state {
 555         struct smbd_smb2_request *smb2req;
 556         struct tevent_queue *wait_queue;
 557 };
 558
 559 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
 560
 561 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
 562                                         struct tevent_context *ev,
 563                                         struct smbd_smb2_request *smb2req)
 564 {
 565         struct tevent_req *req;
 566         struct smbd_smb2_tdis_state *state;
 567         struct tevent_req *subreq;
 568         struct smbXsrv_connection *xconn = NULL;
 569
 570         req = tevent_req_create(mem_ctx, &state,
 571                         struct smbd_smb2_tdis_state);
 572         if (req == NULL) {
 573                 return NULL;
 574         }
 575         state->smb2req = smb2req;
 576
 577         state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
 578         if (tevent_req_nomem(state->wait_queue, req)) {
 579                 return tevent_req_post(req, ev);
 580         }
 581
 582         /*
 583          * Make sure that no new request will be able to use this tcon.
 584          */
 585         smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
 586
 587         xconn = smb2req->xconn->client->connections;
 588         for (; xconn != NULL; xconn = xconn->next) {
 589                 struct smbd_smb2_request *preq;
 590
 591                 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
 592                         if (preq == smb2req) {
 593                                 /* Can't cancel current request. */
 594                                 continue;
 595                         }
 596                         if (preq->tcon != smb2req->tcon) {
 597                                 /* Request on different tcon. */
 598                                 continue;
 599                         }
 600
 601                         /*
 602                          * Never cancel anything in a compound
 603                          * request. Way too hard to deal with
 604                          * the result.
 605                          */
 606                         if (!preq->compound_related && preq->subreq != NULL) {
 607                                 tevent_req_cancel(preq->subreq);
 608                         }
 609
 610                         /*
 611                          * Now wait until the request is finished.
 612                          *
 613                          * We don't set a callback, as we just want to block the
 614                          * wait queue and the talloc_free() of the request will
 615                          * remove the item from the wait queue.
 616                          */
 617                         subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
 618                         if (tevent_req_nomem(subreq, req)) {
 619                                 return tevent_req_post(req, ev);
 620                         }
 621                 }
 622         }
 623
 624         /*
 625          * Now we add our own waiter to the end of the queue,
 626          * this way we get notified when all pending requests are finished
 627          * and send to the socket.
 628          */
 629         subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
 630         if (tevent_req_nomem(subreq, req)) {
 631                 return tevent_req_post(req, ev);
 632         }
 633         tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
 634
 635         return req;
 636 }
 637
 638 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
 639 {
 640         struct tevent_req *req = tevent_req_callback_data(
 641                 subreq, struct tevent_req);
 642         struct smbd_smb2_tdis_state *state = tevent_req_data(
 643                 req, struct smbd_smb2_tdis_state);
 644         NTSTATUS status;
 645
 646         tevent_queue_wait_recv(subreq);
 647         TALLOC_FREE(subreq);
 648
 649         /*
 650          * As we've been awoken, we may have changed
 651          * uid in the meantime. Ensure we're still
 652          * root (SMB2_OP_TDIS has .as_root = true).
 653          */
 654         change_to_root_user();
 655
 656         status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
 657                                          state->smb2req->tcon->compat->vuid);
 658         if (tevent_req_nterror(req, status)) {
 659                 return;
 660         }
 661
 662         /* We did tear down the tcon. */
 663         TALLOC_FREE(state->smb2req->tcon);
 664         tevent_req_done(req);
 665 }
 666
 667 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
 668 {
 669         return tevent_req_simple_recv_ntstatus(req);
 670 }