source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "printing.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/smb/smb_common.h"
  27 #include "../librpc/gen_ndr/ndr_security.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29 #include "messages.h"
  30
  31 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  32 {
  33         switch(in_oplock_level) {
  34         case SMB2_OPLOCK_LEVEL_NONE:
  35                 return NO_OPLOCK;
  36         case SMB2_OPLOCK_LEVEL_II:
  37                 return LEVEL_II_OPLOCK;
  38         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  39                 return EXCLUSIVE_OPLOCK;
  40         case SMB2_OPLOCK_LEVEL_BATCH:
  41                 return BATCH_OPLOCK;
  42         case SMB2_OPLOCK_LEVEL_LEASE:
  43                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  44                         "LEASE_OPLOCK_REQUESTED\n"));
  45                 return NO_OPLOCK;
  46         default:
  47                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  48                         "unknown level %u\n",
  49                         (unsigned int)in_oplock_level));
  50                 return NO_OPLOCK;
  51         }
  52 }
  53
  54 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  55 {
  56         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  57                 return SMB2_OPLOCK_LEVEL_BATCH;
  58         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  59                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  60         } else if (oplock_type == LEVEL_II_OPLOCK) {
  61                 /*
  62                  * Don't use LEVEL_II_OPLOCK_TYPE here as
  63                  * this also includes FAKE_LEVEL_II_OPLOCKs
  64                  * which are internal only.
  65                  */
  66                 return SMB2_OPLOCK_LEVEL_II;
  67         } else {
  68                 return SMB2_OPLOCK_LEVEL_NONE;
  69         }
  70 }
  71
  72 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  73                         struct tevent_context *ev,
  74                         struct smbd_smb2_request *smb2req,
  75                         uint8_t in_oplock_level,
  76                         uint32_t in_impersonation_level,
  77                         uint32_t in_desired_access,
  78                         uint32_t in_file_attributes,
  79                         uint32_t in_share_access,
  80                         uint32_t in_create_disposition,
  81                         uint32_t in_create_options,
  82                         const char *in_name,
  83                         struct smb2_create_blobs in_context_blobs);
  84 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  85                         TALLOC_CTX *mem_ctx,
  86                         uint8_t *out_oplock_level,
  87                         uint32_t *out_create_action,
  88                         NTTIME *out_creation_time,
  89                         NTTIME *out_last_access_time,
  90                         NTTIME *out_last_write_time,
  91                         NTTIME *out_change_time,
  92                         uint64_t *out_allocation_size,
  93                         uint64_t *out_end_of_file,
  94                         uint32_t *out_file_attributes,
  95                         uint64_t *out_file_id_persistent,
  96                         uint64_t *out_file_id_volatile,
  97                         struct smb2_create_blobs *out_context_blobs);
  98
  99 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
 100 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
 101 {
 102         const uint8_t *inbody;
 103         const struct iovec *indyniov;
 104         uint8_t in_oplock_level;
 105         uint32_t in_impersonation_level;
 106         uint32_t in_desired_access;
 107         uint32_t in_file_attributes;
 108         uint32_t in_share_access;
 109         uint32_t in_create_disposition;
 110         uint32_t in_create_options;
 111         uint16_t in_name_offset;
 112         uint16_t in_name_length;
 113         DATA_BLOB in_name_buffer;
 114         char *in_name_string;
 115         size_t in_name_string_size;
 116         uint32_t name_offset = 0;
 117         uint32_t name_available_length = 0;
 118         uint32_t in_context_offset;
 119         uint32_t in_context_length;
 120         DATA_BLOB in_context_buffer;
 121         struct smb2_create_blobs in_context_blobs;
 122         uint32_t context_offset = 0;
 123         uint32_t context_available_length = 0;
 124         uint32_t dyn_offset;
 125         NTSTATUS status;
 126         bool ok;
 127         struct tevent_req *tsubreq;
 128
 129         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 130         if (!NT_STATUS_IS_OK(status)) {
 131                 return smbd_smb2_request_error(smb2req, status);
 132         }
 133         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 134
 135         in_oplock_level         = CVAL(inbody, 0x03);
 136         in_impersonation_level  = IVAL(inbody, 0x04);
 137         in_desired_access       = IVAL(inbody, 0x18);
 138         in_file_attributes      = IVAL(inbody, 0x1C);
 139         in_share_access         = IVAL(inbody, 0x20);
 140         in_create_disposition   = IVAL(inbody, 0x24);
 141         in_create_options       = IVAL(inbody, 0x28);
 142         in_name_offset          = SVAL(inbody, 0x2C);
 143         in_name_length          = SVAL(inbody, 0x2E);
 144         in_context_offset       = IVAL(inbody, 0x30);
 145         in_context_length       = IVAL(inbody, 0x34);
 146
 147         /*
 148          * First check if the dynamic name and context buffers
 149          * are correctly specified.
 150          *
 151          * Note: That we don't check if the name and context buffers
 152          *       overlap
 153          */
 154
 155         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 156
 157         if (in_name_offset == 0 && in_name_length == 0) {
 158                 /* This is ok */
 159                 name_offset = 0;
 160         } else if (in_name_offset < dyn_offset) {
 161                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 162         } else {
 163                 name_offset = in_name_offset - dyn_offset;
 164         }
 165
 166         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 167
 168         if (name_offset > indyniov->iov_len) {
 169                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 170         }
 171
 172         name_available_length = indyniov->iov_len - name_offset;
 173
 174         if (in_name_length > name_available_length) {
 175                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 176         }
 177
 178         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 179         in_name_buffer.length = in_name_length;
 180
 181         if (in_context_offset == 0 && in_context_length == 0) {
 182                 /* This is ok */
 183                 context_offset = 0;
 184         } else if (in_context_offset < dyn_offset) {
 185                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 186         } else {
 187                 context_offset = in_context_offset - dyn_offset;
 188         }
 189
 190         if (context_offset > indyniov->iov_len) {
 191                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 192         }
 193
 194         context_available_length = indyniov->iov_len - context_offset;
 195
 196         if (in_context_length > context_available_length) {
 197                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 198         }
 199
 200         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 201                 context_offset;
 202         in_context_buffer.length = in_context_length;
 203
 204         /*
 205          * Now interpret the name and context buffers
 206          */
 207
 208         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 209                                    in_name_buffer.data,
 210                                    in_name_buffer.length,
 211                                    &in_name_string,
 212                                    &in_name_string_size);
 213         if (!ok) {
 214                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 215         }
 216
 217         if (in_name_buffer.length == 0) {
 218                 in_name_string_size = 0;
 219         }
 220
 221         if (strlen(in_name_string) != in_name_string_size) {
 222                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 223         }
 224
 225         ZERO_STRUCT(in_context_blobs);
 226         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 227         if (!NT_STATUS_IS_OK(status)) {
 228                 return smbd_smb2_request_error(smb2req, status);
 229         }
 230
 231         tsubreq = smbd_smb2_create_send(smb2req,
 232                                        smb2req->sconn->ev_ctx,
 233                                        smb2req,
 234                                        in_oplock_level,
 235                                        in_impersonation_level,
 236                                        in_desired_access,
 237                                        in_file_attributes,
 238                                        in_share_access,
 239                                        in_create_disposition,
 240                                        in_create_options,
 241                                        in_name_string,
 242                                        in_context_blobs);
 243         if (tsubreq == NULL) {
 244                 smb2req->subreq = NULL;
 245                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 246         }
 247         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 248
 249         /*
 250          * For now we keep the logic that we do not send STATUS_PENDING
 251          * for sharing violations, so we just wait 2 seconds.
 252          *
 253          * TODO: we need more tests for this.
 254          */
 255         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 256 }
 257
 258 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 259 {
 260         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 261         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 262 }
 263
 264 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 265 {
 266         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 267                                         struct smbd_smb2_request);
 268         DATA_BLOB outbody;
 269         DATA_BLOB outdyn;
 270         uint8_t out_oplock_level = 0;
 271         uint32_t out_create_action = 0;
 272         NTTIME out_creation_time = 0;
 273         NTTIME out_last_access_time = 0;
 274         NTTIME out_last_write_time = 0;
 275         NTTIME out_change_time = 0;
 276         uint64_t out_allocation_size = 0;
 277         uint64_t out_end_of_file = 0;
 278         uint32_t out_file_attributes = 0;
 279         uint64_t out_file_id_persistent = 0;
 280         uint64_t out_file_id_volatile = 0;
 281         struct smb2_create_blobs out_context_blobs;
 282         DATA_BLOB out_context_buffer;
 283         uint16_t out_context_buffer_offset = 0;
 284         NTSTATUS status;
 285         NTSTATUS error; /* transport error */
 286
 287         status = smbd_smb2_create_recv(tsubreq,
 288                                        smb2req,
 289                                        &out_oplock_level,
 290                                        &out_create_action,
 291                                        &out_creation_time,
 292                                        &out_last_access_time,
 293                                        &out_last_write_time,
 294                                        &out_change_time,
 295                                        &out_allocation_size,
 296                                        &out_end_of_file,
 297                                        &out_file_attributes,
 298                                        &out_file_id_persistent,
 299                                        &out_file_id_volatile,
 300                                        &out_context_blobs);
 301         if (!NT_STATUS_IS_OK(status)) {
 302                 error = smbd_smb2_request_error(smb2req, status);
 303                 if (!NT_STATUS_IS_OK(error)) {
 304                         smbd_server_connection_terminate(smb2req->sconn,
 305                                                          nt_errstr(error));
 306                         return;
 307                 }
 308                 return;
 309         }
 310
 311         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 312         if (!NT_STATUS_IS_OK(status)) {
 313                 error = smbd_smb2_request_error(smb2req, status);
 314                 if (!NT_STATUS_IS_OK(error)) {
 315                         smbd_server_connection_terminate(smb2req->sconn,
 316                                                          nt_errstr(error));
 317                         return;
 318                 }
 319                 return;
 320         }
 321
 322         if (out_context_buffer.length > 0) {
 323                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 324         }
 325
 326         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 327         if (outbody.data == NULL) {
 328                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 329                 if (!NT_STATUS_IS_OK(error)) {
 330                         smbd_server_connection_terminate(smb2req->sconn,
 331                                                          nt_errstr(error));
 332                         return;
 333                 }
 334                 return;
 335         }
 336
 337         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 338         SCVAL(outbody.data, 0x02,
 339               out_oplock_level);                /* oplock level */
 340         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 341         SIVAL(outbody.data, 0x04,
 342               out_create_action);               /* create action */
 343         SBVAL(outbody.data, 0x08,
 344               out_creation_time);               /* creation time */
 345         SBVAL(outbody.data, 0x10,
 346               out_last_access_time);            /* last access time */
 347         SBVAL(outbody.data, 0x18,
 348               out_last_write_time);             /* last write time */
 349         SBVAL(outbody.data, 0x20,
 350               out_change_time);                 /* change time */
 351         SBVAL(outbody.data, 0x28,
 352               out_allocation_size);             /* allocation size */
 353         SBVAL(outbody.data, 0x30,
 354               out_end_of_file);                 /* end of file */
 355         SIVAL(outbody.data, 0x38,
 356               out_file_attributes);             /* file attributes */
 357         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 358         SBVAL(outbody.data, 0x40,
 359               out_file_id_persistent);          /* file id (persistent) */
 360         SBVAL(outbody.data, 0x48,
 361               out_file_id_volatile);            /* file id (volatile) */
 362         SIVAL(outbody.data, 0x50,
 363               out_context_buffer_offset);       /* create contexts offset */
 364         SIVAL(outbody.data, 0x54,
 365               out_context_buffer.length);       /* create contexts length */
 366
 367         outdyn = out_context_buffer;
 368
 369         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 370         if (!NT_STATUS_IS_OK(error)) {
 371                 smbd_server_connection_terminate(smb2req->sconn,
 372                                                  nt_errstr(error));
 373                 return;
 374         }
 375 }
 376
 377 struct smbd_smb2_create_state {
 378         struct smbd_smb2_request *smb2req;
 379         struct smb_request *smb1req;
 380         bool open_was_deferred;
 381         struct tevent_timer *te;
 382         struct tevent_immediate *im;
 383         struct timeval request_time;
 384         struct file_id id;
 385         DATA_BLOB private_data;
 386         uint8_t out_oplock_level;
 387         uint32_t out_create_action;
 388         NTTIME out_creation_time;
 389         NTTIME out_last_access_time;
 390         NTTIME out_last_write_time;
 391         NTTIME out_change_time;
 392         uint64_t out_allocation_size;
 393         uint64_t out_end_of_file;
 394         uint32_t out_file_attributes;
 395         uint64_t out_file_id_persistent;
 396         uint64_t out_file_id_volatile;
 397         struct smb2_create_blobs out_context_blobs;
 398 };
 399
 400 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 401                         struct tevent_context *ev,
 402                         struct smbd_smb2_request *smb2req,
 403                         uint8_t in_oplock_level,
 404                         uint32_t in_impersonation_level,
 405                         uint32_t in_desired_access,
 406                         uint32_t in_file_attributes,
 407                         uint32_t in_share_access,
 408                         uint32_t in_create_disposition,
 409                         uint32_t in_create_options,
 410                         const char *in_name,
 411                         struct smb2_create_blobs in_context_blobs)
 412 {
 413         struct tevent_req *req = NULL;
 414         struct smbd_smb2_create_state *state = NULL;
 415         NTSTATUS status;
 416         struct smb_request *smb1req = NULL;
 417         files_struct *result = NULL;
 418         int info;
 419         struct timespec write_time_ts;
 420         struct smb2_create_blobs out_context_blobs;
 421         int requested_oplock_level;
 422         struct smb2_create_blob *dhnc = NULL;
 423         struct smb2_create_blob *dh2c = NULL;
 424         struct smb2_create_blob *dhnq = NULL;
 425         struct smb2_create_blob *dh2q = NULL;
 426         struct smbXsrv_open *op = NULL;
 427
 428         ZERO_STRUCT(out_context_blobs);
 429
 430         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 431                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 432         } else {
 433                 requested_oplock_level = in_oplock_level;
 434         }
 435
 436
 437         if (smb2req->subreq == NULL) {
 438                 /* New create call. */
 439                 req = tevent_req_create(mem_ctx, &state,
 440                                 struct smbd_smb2_create_state);
 441                 if (req == NULL) {
 442                         return NULL;
 443                 }
 444                 state->smb2req = smb2req;
 445
 446                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 447                 if (tevent_req_nomem(smb1req, req)) {
 448                         return tevent_req_post(req, ev);
 449                 }
 450                 state->smb1req = smb1req;
 451                 smb2req->subreq = req;
 452                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 453                         in_name));
 454         } else {
 455                 /* Re-entrant create call. */
 456                 req = smb2req->subreq;
 457                 state = tevent_req_data(req,
 458                                 struct smbd_smb2_create_state);
 459                 smb1req = state->smb1req;
 460                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 461                         in_name ));
 462         }
 463
 464         dhnq = smb2_create_blob_find(&in_context_blobs,
 465                                      SMB2_CREATE_TAG_DHNQ);
 466         dhnc = smb2_create_blob_find(&in_context_blobs,
 467                                      SMB2_CREATE_TAG_DHNC);
 468         dh2q = smb2_create_blob_find(&in_context_blobs,
 469                                      SMB2_CREATE_TAG_DH2Q);
 470         dh2c = smb2_create_blob_find(&in_context_blobs,
 471                                      SMB2_CREATE_TAG_DH2C);
 472
 473         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 474             (dh2q && dh2c))
 475         {
 476                 /* not both are allowed at the same time */
 477                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 478                 return tevent_req_post(req, ev);
 479         }
 480
 481         if (dhnc) {
 482                 uint32_t num_blobs_allowed;
 483
 484                 if (dhnc->data.length != 16) {
 485                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 486                         return tevent_req_post(req, ev);
 487                 }
 488
 489                 /*
 490                  * According to MS-SMB2: 3.3.5.9.7, "Handling the
 491                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
 492                  * we should ignore an additional dhnq blob, but fail
 493                  * the request (with status OBJECT_NAME_NOT_FOUND) if
 494                  * any other extra create blob has been provided.
 495                  *
 496                  * (Note that the cases of an additional dh2q or dh2c blob
 497                  *  which require a different error code, have been treated
 498                  *  above.)
 499                  *
 500                  * TODO:
 501                  * This is only true for the oplock case:
 502                  * For leases, lease request is required additionally.
 503                  */
 504
 505                 if (dhnq) {
 506                         num_blobs_allowed = 2;
 507                 } else {
 508                         num_blobs_allowed = 1;
 509                 }
 510
 511                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 512                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 513                         return tevent_req_post(req, ev);
 514                 }
 515         }
 516
 517         if (dh2c) {
 518                 uint32_t num_blobs_allowed;
 519
 520                 if (dh2c->data.length != 36) {
 521                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 522                         return tevent_req_post(req, ev);
 523                 }
 524
 525                 /*
 526                  * According to MS-SMB2: 3.3.5.9.12, "Handling the
 527                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
 528                  * we should fail the request with status
 529                  * OBJECT_NAME_NOT_FOUND if any other create blob has been
 530                  * provided.
 531                  *
 532                  * (Note that the cases of an additional dhnq, dhnc or dh2q
 533                  *  blob which require a different error code, have been
 534                  *  treated above.)
 535                  *
 536                  * TODO:
 537                  * This is only true for the oplock case:
 538                  * For leases, lease request is required additionally!
 539                  */
 540
 541                 num_blobs_allowed = 1;
 542
 543                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 544                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 545                         return tevent_req_post(req, ev);
 546                 }
 547         }
 548
 549         if (IS_IPC(smb1req->conn)) {
 550                 const char *pipe_name = in_name;
 551
 552                 if (dhnc || dh2c) {
 553                         /* durable handles are not supported on IPC$ */
 554                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 555                         return tevent_req_post(req, ev);
 556                 }
 557
 558                 if (!lp_nt_pipe_support()) {
 559                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 560                         return tevent_req_post(req, ev);
 561                 }
 562
 563                 status = open_np_file(smb1req, pipe_name, &result);
 564                 if (!NT_STATUS_IS_OK(status)) {
 565                         tevent_req_nterror(req, status);
 566                         return tevent_req_post(req, ev);
 567                 }
 568                 info = FILE_WAS_OPENED;
 569         } else if (CAN_PRINT(smb1req->conn)) {
 570                 if (dhnc || dh2c) {
 571                         /* durable handles are not supported on printers */
 572                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 573                         return tevent_req_post(req, ev);
 574                 }
 575
 576                 status = file_new(smb1req, smb1req->conn, &result);
 577                 if(!NT_STATUS_IS_OK(status)) {
 578                         tevent_req_nterror(req, status);
 579                         return tevent_req_post(req, ev);
 580                 }
 581
 582                 status = print_spool_open(result, in_name,
 583                                           smb1req->vuid);
 584                 if (!NT_STATUS_IS_OK(status)) {
 585                         file_free(smb1req, result);
 586                         tevent_req_nterror(req, status);
 587                         return tevent_req_post(req, ev);
 588                 }
 589                 info = FILE_WAS_CREATED;
 590         } else {
 591                 char *fname;
 592                 struct smb2_create_blob *exta = NULL;
 593                 struct ea_list *ea_list = NULL;
 594                 struct smb2_create_blob *mxac = NULL;
 595                 NTTIME max_access_time = 0;
 596                 struct smb2_create_blob *secd = NULL;
 597                 struct security_descriptor *sec_desc = NULL;
 598                 struct smb2_create_blob *alsi = NULL;
 599                 uint64_t allocation_size = 0;
 600                 struct smb2_create_blob *twrp = NULL;
 601                 struct smb2_create_blob *qfid = NULL;
 602                 struct GUID _create_guid = GUID_zero();
 603                 struct GUID *create_guid = NULL;
 604                 bool update_open = false;
 605                 bool durable_requested = false;
 606                 uint32_t durable_timeout_msec = 0;
 607                 bool do_durable_reconnect = false;
 608                 uint64_t persistent_id = 0;
 609
 610                 exta = smb2_create_blob_find(&in_context_blobs,
 611                                              SMB2_CREATE_TAG_EXTA);
 612                 mxac = smb2_create_blob_find(&in_context_blobs,
 613                                              SMB2_CREATE_TAG_MXAC);
 614                 secd = smb2_create_blob_find(&in_context_blobs,
 615                                              SMB2_CREATE_TAG_SECD);
 616                 alsi = smb2_create_blob_find(&in_context_blobs,
 617                                              SMB2_CREATE_TAG_ALSI);
 618                 twrp = smb2_create_blob_find(&in_context_blobs,
 619                                              SMB2_CREATE_TAG_TWRP);
 620                 qfid = smb2_create_blob_find(&in_context_blobs,
 621                                              SMB2_CREATE_TAG_QFID);
 622
 623                 fname = talloc_strdup(state, in_name);
 624                 if (tevent_req_nomem(fname, req)) {
 625                         return tevent_req_post(req, ev);
 626                 }
 627
 628                 if (exta) {
 629                         ea_list = read_nttrans_ea_list(mem_ctx,
 630                                 (const char *)exta->data.data, exta->data.length);
 631                         if (!ea_list) {
 632                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 633                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 634                                 return tevent_req_post(req, ev);
 635                         }
 636
 637                         if (ea_list_has_invalid_name(ea_list)) {
 638                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 639                                 return tevent_req_post(req, ev);
 640                         }
 641                 }
 642
 643                 if (mxac) {
 644                         if (mxac->data.length == 0) {
 645                                 max_access_time = 0;
 646                         } else if (mxac->data.length == 8) {
 647                                 max_access_time = BVAL(mxac->data.data, 0);
 648                         } else {
 649                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 650                                 return tevent_req_post(req, ev);
 651                         }
 652                 }
 653
 654                 if (secd) {
 655                         enum ndr_err_code ndr_err;
 656
 657                         sec_desc = talloc_zero(state, struct security_descriptor);
 658                         if (tevent_req_nomem(sec_desc, req)) {
 659                                 return tevent_req_post(req, ev);
 660                         }
 661
 662                         ndr_err = ndr_pull_struct_blob(&secd->data,
 663                                 sec_desc, sec_desc,
 664                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 665                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 666                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 667                                          ndr_errstr(ndr_err)));
 668                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 669                                 return tevent_req_post(req, ev);
 670                         }
 671                 }
 672
 673                 if (dhnq) {
 674                         if (dhnq->data.length != 16) {
 675                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 676                                 return tevent_req_post(req, ev);
 677                         }
 678
 679                         if (dh2q) {
 680                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 681                                 return tevent_req_post(req, ev);
 682                         }
 683
 684                         /*
 685                          * durable handle request is processed below.
 686                          */
 687                         durable_requested = true;
 688                         /*
 689                          * Set the timeout to 16 mins.
 690                          *
 691                          * TODO: test this against Windows 2012
 692                          *       as the default for durable v2 is 1 min.
 693                          */
 694                         durable_timeout_msec = (16*60*1000);
 695                 }
 696
 697                 if (dh2q) {
 698                         const uint8_t *p = dh2q->data.data;
 699                         uint32_t durable_v2_timeout = 0;
 700                         DATA_BLOB create_guid_blob;
 701
 702                         if (dh2q->data.length != 32) {
 703                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 704                                 return tevent_req_post(req, ev);
 705                         }
 706
 707                         if (dhnq) {
 708                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 709                                 return tevent_req_post(req, ev);
 710                         }
 711
 712                         durable_v2_timeout = IVAL(p, 0);
 713                         create_guid_blob = data_blob_const(p + 16, 16);
 714
 715                         status = GUID_from_ndr_blob(&create_guid_blob,
 716                                                     &_create_guid);
 717                         if (tevent_req_nterror(req, status)) {
 718                                 return tevent_req_post(req, ev);
 719                         }
 720                         create_guid = &_create_guid;
 721                         /*
 722                          * we need to store the create_guid later
 723                          */
 724                         update_open = true;
 725
 726                         /*
 727                          * durable handle v2 request processed below
 728                          */
 729                         durable_requested = true;
 730                         durable_timeout_msec = durable_v2_timeout;
 731                         if (durable_timeout_msec == 0) {
 732                                 /*
 733                                  * Set the timeout to 1 min as default.
 734                                  *
 735                                  * This matches Windows 2012.
 736                                  */
 737                                 durable_timeout_msec = (60*1000);
 738                         }
 739                 }
 740
 741                 if (dhnc) {
 742                         persistent_id = BVAL(dhnc->data.data, 0);
 743
 744                         do_durable_reconnect = true;
 745                 }
 746
 747                 if (dh2c) {
 748                         const uint8_t *p = dh2c->data.data;
 749                         DATA_BLOB create_guid_blob;
 750
 751                         persistent_id = BVAL(p, 0);
 752                         create_guid_blob = data_blob_const(p + 16, 16);
 753
 754                         status = GUID_from_ndr_blob(&create_guid_blob,
 755                                                     &_create_guid);
 756                         if (tevent_req_nterror(req, status)) {
 757                                 return tevent_req_post(req, ev);
 758                         }
 759                         create_guid = &_create_guid;
 760
 761                         do_durable_reconnect = true;
 762                 }
 763
 764                 if (alsi) {
 765                         if (alsi->data.length != 8) {
 766                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 767                                 return tevent_req_post(req, ev);
 768                         }
 769                         allocation_size = BVAL(alsi->data.data, 0);
 770                 }
 771
 772                 if (twrp) {
 773                         NTTIME nttime;
 774                         time_t t;
 775                         struct tm *tm;
 776
 777                         if (twrp->data.length != 8) {
 778                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 779                                 return tevent_req_post(req, ev);
 780                         }
 781
 782                         nttime = BVAL(twrp->data.data, 0);
 783                         t = nt_time_to_unix(nttime);
 784                         tm = gmtime(&t);
 785
 786                         TALLOC_FREE(fname);
 787                         fname = talloc_asprintf(state,
 788                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 789                                         tm->tm_year + 1900,
 790                                         tm->tm_mon + 1,
 791                                         tm->tm_mday,
 792                                         tm->tm_hour,
 793                                         tm->tm_min,
 794                                         tm->tm_sec,
 795                                         in_name);
 796                         if (tevent_req_nomem(fname, req)) {
 797                                 return tevent_req_post(req, ev);
 798                         }
 799                 }
 800
 801                 if (qfid) {
 802                         if (qfid->data.length != 0) {
 803                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 804                                 return tevent_req_post(req, ev);
 805                         }
 806                 }
 807
 808                 /* these are ignored for SMB2 */
 809                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 810                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 811
 812                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 813
 814                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 815
 816                 /*
 817                  * For the backend file open procedure, there are
 818                  * two possible modes: durable_reconnect or not.
 819                  */
 820                 if (do_durable_reconnect) {
 821                         DATA_BLOB new_cookie = data_blob_null;
 822                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 823
 824                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 825                                                 smb1req->conn->session_info,
 826                                                 persistent_id, create_guid,
 827                                                 now, &op);
 828                         if (!NT_STATUS_IS_OK(status)) {
 829                                 DEBUG(3, ("smbd_smb2_create_send: "
 830                                           "smb2srv_open_recreate failed: %s\n",
 831                                           nt_errstr(status)));
 832                                 tevent_req_nterror(req, status);
 833                                 return tevent_req_post(req, ev);
 834                         }
 835
 836                         DEBUG(10, ("smb2_create_send: %s to recreate the "
 837                                    "smb2srv_open struct for a durable handle.\n",
 838                                    op->global->durable ? "succeded" : "failed"));
 839
 840                         if (!op->global->durable) {
 841                                 talloc_free(op);
 842                                 tevent_req_nterror(req,
 843                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 844                                 return tevent_req_post(req, ev);
 845                         }
 846
 847                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 848                                                 smb1req,
 849                                                 op, /* smbXsrv_open input */
 850                                                 op->global->backend_cookie,
 851                                                 op, /* TALLOC_CTX */
 852                                                 &result, &new_cookie);
 853                         if (!NT_STATUS_IS_OK(status)) {
 854                                 NTSTATUS return_status;
 855
 856                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 857
 858                                 DEBUG(3, ("smbd_smb2_create_send: "
 859                                           "durable_reconnect failed: %s => %s\n",
 860                                           nt_errstr(status),
 861                                           nt_errstr(return_status)));
 862
 863                                 tevent_req_nterror(req, return_status);
 864                                 return tevent_req_post(req, ev);
 865                         }
 866
 867                         data_blob_free(&op->global->backend_cookie);
 868                         op->global->backend_cookie = new_cookie;
 869
 870                         op->status = NT_STATUS_OK;
 871                         op->global->disconnect_time = 0;
 872
 873                         /* save the timout for later update */
 874                         durable_timeout_msec = op->global->durable_timeout_msec;
 875
 876                         update_open = true;
 877
 878                         info = FILE_WAS_OPENED;
 879                 } else {
 880                         struct smb_filename *smb_fname = NULL;
 881
 882                         /*
 883                          * For a DFS path the function parse_dfs_path()
 884                          * will do the path processing.
 885                          */
 886
 887                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 888                                 /* convert '\\' into '/' */
 889                                 status = check_path_syntax(fname);
 890                                 if (!NT_STATUS_IS_OK(status)) {
 891                                         tevent_req_nterror(req, status);
 892                                         return tevent_req_post(req, ev);
 893                                 }
 894                         }
 895
 896                         status = filename_convert(req,
 897                                                   smb1req->conn,
 898                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 899                                                   fname,
 900                                                   (in_create_disposition == FILE_CREATE) ?
 901                                                   UCF_CREATING_FILE : 0,
 902                                                   NULL, /* ppath_contains_wcards */
 903                                                   &smb_fname);
 904                         if (!NT_STATUS_IS_OK(status)) {
 905                                 tevent_req_nterror(req, status);
 906                                 return tevent_req_post(req, ev);
 907                         }
 908
 909                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 910                                                      smb1req,
 911                                                      0, /* root_dir_fid */
 912                                                      smb_fname,
 913                                                      in_desired_access,
 914                                                      in_share_access,
 915                                                      in_create_disposition,
 916                                                      in_create_options,
 917                                                      in_file_attributes,
 918                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 919                                                      allocation_size,
 920                                                      0, /* private_flags */
 921                                                      sec_desc,
 922                                                      ea_list,
 923                                                      &result,
 924                                                      &info);
 925                         if (!NT_STATUS_IS_OK(status)) {
 926                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 927                                         return req;
 928                                 }
 929                                 tevent_req_nterror(req, status);
 930                                 return tevent_req_post(req, ev);
 931                         }
 932                         op = result->op;
 933                 }
 934
 935                 /*
 936                  * here we have op == result->op
 937                  */
 938
 939                 DEBUG(10, ("smbd_smb2_create_send: "
 940                            "response construction phase\n"));
 941
 942                 if (mxac) {
 943                         NTTIME last_write_time;
 944
 945                         unix_timespec_to_nt_time(&last_write_time,
 946                                                  result->fsp_name->st.st_ex_mtime);
 947                         if (last_write_time != max_access_time) {
 948                                 uint8_t p[8];
 949                                 uint32_t max_access_granted;
 950                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 951
 952                                 status = smbd_calculate_access_mask(smb1req->conn,
 953                                                         result->fsp_name,
 954                                                         false,
 955                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 956                                                         &max_access_granted);
 957
 958                                 SIVAL(p, 0, NT_STATUS_V(status));
 959                                 SIVAL(p, 4, max_access_granted);
 960
 961                                 status = smb2_create_blob_add(state,
 962                                                         &out_context_blobs,
 963                                                         SMB2_CREATE_TAG_MXAC,
 964                                                         blob);
 965                                 if (!NT_STATUS_IS_OK(status)) {
 966                                         tevent_req_nterror(req, status);
 967                                         return tevent_req_post(req, ev);
 968                                 }
 969                         }
 970                 }
 971
 972                 if (durable_requested &&
 973                     BATCH_OPLOCK_TYPE(result->oplock_type))
 974                 {
 975                         status = SMB_VFS_DURABLE_COOKIE(result,
 976                                                 op,
 977                                                 &op->global->backend_cookie);
 978                         if (!NT_STATUS_IS_OK(status)) {
 979                                 op->global->backend_cookie = data_blob_null;
 980                         }
 981                 }
 982                 if (op->global->backend_cookie.length > 0) {
 983                         update_open = true;
 984
 985                         op->global->durable = true;
 986                         op->global->durable_timeout_msec = durable_timeout_msec;
 987                 }
 988
 989                 if (update_open) {
 990                         op->global->create_guid = _create_guid;
 991
 992                         status = smbXsrv_open_update(op);
 993                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 994                                    "returned %s\n",
 995                                    nt_errstr(status)));
 996                         if (!NT_STATUS_IS_OK(status)) {
 997                                 tevent_req_nterror(req, status);
 998                                 return tevent_req_post(req, ev);
 999                         }
1000                 }
1001
1002                 if (dhnq && op->global->durable) {
1003                         uint8_t p[8] = { 0, };
1004                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1005
1006                         status = smb2_create_blob_add(state,
1007                                                       &out_context_blobs,
1008                                                       SMB2_CREATE_TAG_DHNQ,
1009                                                       blob);
1010                         if (!NT_STATUS_IS_OK(status)) {
1011                                 tevent_req_nterror(req, status);
1012                                 return tevent_req_post(req, ev);
1013                         }
1014                 }
1015
1016                 if (dh2q && op->global->durable) {
1017                         uint8_t p[8] = { 0, };
1018                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1019                         uint32_t durable_v2_response_flags = 0;
1020
1021                         SIVAL(p, 0, op->global->durable_timeout_msec);
1022                         SIVAL(p, 4, durable_v2_response_flags);
1023
1024                         status = smb2_create_blob_add(state, &out_context_blobs,
1025                                                       SMB2_CREATE_TAG_DH2Q,
1026                                                       blob);
1027                         if (!NT_STATUS_IS_OK(status)) {
1028                                 tevent_req_nterror(req, status);
1029                                 return tevent_req_post(req, ev);
1030                         }
1031                 }
1032
1033                 if (qfid) {
1034                         uint8_t p[32];
1035                         uint64_t file_index = get_FileIndex(result->conn,
1036                                                         &result->fsp_name->st);
1037                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1038
1039                         ZERO_STRUCT(p);
1040
1041                         /* From conversations with Microsoft engineers at
1042                            the MS plugfest. The first 8 bytes are the "volume index"
1043                            == inode, the second 8 bytes are the "volume id",
1044                            == dev. This will be updated in the SMB2 doc. */
1045                         SBVAL(p, 0, file_index);
1046                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1047
1048                         status = smb2_create_blob_add(state, &out_context_blobs,
1049                                                       SMB2_CREATE_TAG_QFID,
1050                                                       blob);
1051                         if (!NT_STATUS_IS_OK(status)) {
1052                                 tevent_req_nterror(req, status);
1053                                 return tevent_req_post(req, ev);
1054                         }
1055                 }
1056         }
1057
1058         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1059
1060         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1061                 state->out_oplock_level = in_oplock_level;
1062         } else {
1063                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1064         }
1065
1066         if ((in_create_disposition == FILE_SUPERSEDE)
1067             && (info == FILE_WAS_OVERWRITTEN)) {
1068                 state->out_create_action = FILE_WAS_SUPERSEDED;
1069         } else {
1070                 state->out_create_action = info;
1071         }
1072         state->out_file_attributes = dos_mode(result->conn,
1073                                            result->fsp_name);
1074         /* Deal with other possible opens having a modified
1075            write time. JRA. */
1076         ZERO_STRUCT(write_time_ts);
1077         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1078         if (!null_timespec(write_time_ts)) {
1079                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1080         }
1081
1082         unix_timespec_to_nt_time(&state->out_creation_time,
1083                         get_create_timespec(smb1req->conn, result,
1084                                         result->fsp_name));
1085         unix_timespec_to_nt_time(&state->out_last_access_time,
1086                         result->fsp_name->st.st_ex_atime);
1087         unix_timespec_to_nt_time(&state->out_last_write_time,
1088                         result->fsp_name->st.st_ex_mtime);
1089         unix_timespec_to_nt_time(&state->out_change_time,
1090                         get_change_timespec(smb1req->conn, result,
1091                                         result->fsp_name));
1092         state->out_allocation_size =
1093                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1094                                                &(result->fsp_name->st));
1095         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1096         if (state->out_file_attributes == 0) {
1097                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1098         }
1099         state->out_file_id_persistent = result->op->global->open_persistent_id;
1100         state->out_file_id_volatile = result->op->global->open_volatile_id;
1101         state->out_context_blobs = out_context_blobs;
1102
1103         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1104                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1105
1106         tevent_req_done(req);
1107         return tevent_req_post(req, ev);
1108 }
1109
1110 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1111                         TALLOC_CTX *mem_ctx,
1112                         uint8_t *out_oplock_level,
1113                         uint32_t *out_create_action,
1114                         NTTIME *out_creation_time,
1115                         NTTIME *out_last_access_time,
1116                         NTTIME *out_last_write_time,
1117                         NTTIME *out_change_time,
1118                         uint64_t *out_allocation_size,
1119                         uint64_t *out_end_of_file,
1120                         uint32_t *out_file_attributes,
1121                         uint64_t *out_file_id_persistent,
1122                         uint64_t *out_file_id_volatile,
1123                         struct smb2_create_blobs *out_context_blobs)
1124 {
1125         NTSTATUS status;
1126         struct smbd_smb2_create_state *state = tevent_req_data(req,
1127                                                struct smbd_smb2_create_state);
1128
1129         if (tevent_req_is_nterror(req, &status)) {
1130                 tevent_req_received(req);
1131                 return status;
1132         }
1133
1134         *out_oplock_level       = state->out_oplock_level;
1135         *out_create_action      = state->out_create_action;
1136         *out_creation_time      = state->out_creation_time;
1137         *out_last_access_time   = state->out_last_access_time;
1138         *out_last_write_time    = state->out_last_write_time;
1139         *out_change_time        = state->out_change_time;
1140         *out_allocation_size    = state->out_allocation_size;
1141         *out_end_of_file        = state->out_end_of_file;
1142         *out_file_attributes    = state->out_file_attributes;
1143         *out_file_id_persistent = state->out_file_id_persistent;
1144         *out_file_id_volatile   = state->out_file_id_volatile;
1145         *out_context_blobs      = state->out_context_blobs;
1146
1147         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1148
1149         tevent_req_received(req);
1150         return NT_STATUS_OK;
1151 }
1152
1153 /*********************************************************
1154  Code for dealing with deferred opens.
1155 *********************************************************/
1156
1157 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1158                         struct timeval *p_request_time,
1159                         void **pp_state)
1160 {
1161         struct smbd_smb2_create_state *state = NULL;
1162         struct tevent_req *req = NULL;
1163
1164         if (!smb2req) {
1165                 return false;
1166         }
1167         req = smb2req->subreq;
1168         if (!req) {
1169                 return false;
1170         }
1171         state = tevent_req_data(req, struct smbd_smb2_create_state);
1172         if (!state) {
1173                 return false;
1174         }
1175         if (!state->open_was_deferred) {
1176                 return false;
1177         }
1178         if (p_request_time) {
1179                 *p_request_time = state->request_time;
1180         }
1181         if (pp_state) {
1182                 *pp_state = (void *)state->private_data.data;
1183         }
1184         return true;
1185 }
1186
1187 /*********************************************************
1188  Re-process this call early - requested by message or
1189  close.
1190 *********************************************************/
1191
1192 static struct smbd_smb2_request *find_open_smb2req(
1193         struct smbd_server_connection *sconn, uint64_t mid)
1194 {
1195         struct smbd_smb2_request *smb2req;
1196
1197         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1198                 uint64_t message_id;
1199                 if (smb2req->subreq == NULL) {
1200                         /* This message has been processed. */
1201                         continue;
1202                 }
1203                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1204                         /* This message has been processed. */
1205                         continue;
1206                 }
1207                 message_id = get_mid_from_smb2req(smb2req);
1208                 if (message_id == mid) {
1209                         return smb2req;
1210                 }
1211         }
1212         return NULL;
1213 }
1214
1215 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1216 {
1217         struct smbd_smb2_create_state *state = NULL;
1218         struct smbd_smb2_request *smb2req;
1219
1220         smb2req = find_open_smb2req(sconn, mid);
1221
1222         if (!smb2req) {
1223                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1224                         (unsigned long long)mid));
1225                 return false;
1226         }
1227         if (!smb2req->subreq) {
1228                 return false;
1229         }
1230         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1231                 return false;
1232         }
1233         state = tevent_req_data(smb2req->subreq,
1234                         struct smbd_smb2_create_state);
1235         if (!state) {
1236                 return false;
1237         }
1238         /* It's not in progress if there's no timeout event. */
1239         if (!state->open_was_deferred) {
1240                 return false;
1241         }
1242
1243         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1244                         (unsigned long long)mid));
1245
1246         return true;
1247 }
1248
1249 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1250                                                         uint64_t mid)
1251 {
1252         struct smbd_smb2_create_state *state = NULL;
1253
1254         if (!smb2req->subreq) {
1255                 return;
1256         }
1257         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1258                 return;
1259         }
1260         state = tevent_req_data(smb2req->subreq,
1261                         struct smbd_smb2_create_state);
1262         if (!state) {
1263                 return;
1264         }
1265
1266         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1267                 "mid %llu\n",
1268                 (unsigned long long)mid ));
1269
1270         state->open_was_deferred = false;
1271         /* Ensure we don't have any outstanding timer event. */
1272         TALLOC_FREE(state->te);
1273         /* Ensure we don't have any outstanding immediate event. */
1274         TALLOC_FREE(state->im);
1275 }
1276
1277 void remove_deferred_open_message_smb2(
1278         struct smbd_server_connection *sconn, uint64_t mid)
1279 {
1280         struct smbd_smb2_request *smb2req;
1281
1282         smb2req = find_open_smb2req(sconn, mid);
1283
1284         if (!smb2req) {
1285                 DEBUG(10,("remove_deferred_open_message_smb2: "
1286                         "can't find mid %llu\n",
1287                         (unsigned long long)mid ));
1288                 return;
1289         }
1290         remove_deferred_open_message_smb2_internal(smb2req, mid);
1291 }
1292
1293 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1294                                         struct tevent_immediate *im,
1295                                         void *private_data)
1296 {
1297         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1298                                         struct smbd_smb2_request);
1299         struct smbd_server_connection *sconn = smb2req->sconn;
1300         uint64_t mid = get_mid_from_smb2req(smb2req);
1301         NTSTATUS status;
1302
1303         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1304                 "re-dispatching mid %llu\n",
1305                 (unsigned long long)mid ));
1306
1307         status = smbd_smb2_request_dispatch(smb2req);
1308         if (!NT_STATUS_IS_OK(status)) {
1309                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1310                 return;
1311         }
1312 }
1313
1314 bool schedule_deferred_open_message_smb2(
1315         struct smbd_server_connection *sconn, uint64_t mid)
1316 {
1317         struct smbd_smb2_create_state *state = NULL;
1318         struct smbd_smb2_request *smb2req;
1319
1320         smb2req = find_open_smb2req(sconn, mid);
1321
1322         if (!smb2req) {
1323                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1324                         "can't find mid %llu\n",
1325                         (unsigned long long)mid ));
1326                 return false;
1327         }
1328         if (!smb2req->subreq) {
1329                 return false;
1330         }
1331         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1332                 return false;
1333         }
1334         state = tevent_req_data(smb2req->subreq,
1335                         struct smbd_smb2_create_state);
1336         if (!state) {
1337                 return false;
1338         }
1339
1340         /* Ensure we don't have any outstanding timer event. */
1341         TALLOC_FREE(state->te);
1342         /* Ensure we don't have any outstanding immediate event. */
1343         TALLOC_FREE(state->im);
1344
1345         /*
1346          * This is subtle. We must null out the callback
1347          * before rescheduling, else the first call to
1348          * tevent_req_nterror() causes the _receive()
1349          * function to be called, this causing tevent_req_post()
1350          * to crash.
1351          */
1352         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1353
1354         state->im = tevent_create_immediate(smb2req);
1355         if (!state->im) {
1356                 smbd_server_connection_terminate(smb2req->sconn,
1357                         nt_errstr(NT_STATUS_NO_MEMORY));
1358                 return false;
1359         }
1360
1361         DEBUG(10,("schedule_deferred_open_message_smb2: "
1362                 "re-processing mid %llu\n",
1363                 (unsigned long long)mid ));
1364
1365         tevent_schedule_immediate(state->im,
1366                         smb2req->sconn->ev_ctx,
1367                         smbd_smb2_create_request_dispatch_immediate,
1368                         smb2req);
1369
1370         return true;
1371 }
1372
1373 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1374 {
1375         struct smbd_smb2_request *smb2req = NULL;
1376         struct smbd_smb2_create_state *state = tevent_req_data(req,
1377                                 struct smbd_smb2_create_state);
1378         uint64_t mid;
1379
1380         if (!state) {
1381                 return false;
1382         }
1383
1384         if (!state->smb2req) {
1385                 return false;
1386         }
1387
1388         smb2req = state->smb2req;
1389         mid = get_mid_from_smb2req(smb2req);
1390
1391         if (is_deferred_open_async(state->private_data.data)) {
1392                 /* Can't cancel an async create. */
1393                 return false;
1394         }
1395
1396         remove_deferred_open_message_smb2_internal(smb2req, mid);
1397
1398         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1399         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1400         return true;
1401 }
1402
1403 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1404                                 struct timeval request_time,
1405                                 struct timeval timeout,
1406                                 struct file_id id,
1407                                 char *private_data,
1408                                 size_t priv_len)
1409 {
1410         struct tevent_req *req = NULL;
1411         struct smbd_smb2_create_state *state = NULL;
1412         struct timeval end_time;
1413
1414         if (!smb2req) {
1415                 return false;
1416         }
1417         req = smb2req->subreq;
1418         if (!req) {
1419                 return false;
1420         }
1421         state = tevent_req_data(req, struct smbd_smb2_create_state);
1422         if (!state) {
1423                 return false;
1424         }
1425         state->id = id;
1426         state->request_time = request_time;
1427         state->private_data = data_blob_talloc(state, private_data,
1428                                                 priv_len);
1429         if (!state->private_data.data) {
1430                 return false;
1431         }
1432
1433         /* Re-schedule us to retry on timer expiry. */
1434         end_time = timeval_sum(&request_time, &timeout);
1435
1436         DEBUG(10,("push_deferred_open_message_smb2: "
1437                 "timeout at %s\n",
1438                 timeval_string(talloc_tos(),
1439                                 &end_time,
1440                                 true) ));
1441
1442         state->open_was_deferred = true;
1443
1444         /* allow this request to be canceled */
1445         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1446
1447         return true;
1448 }