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 smbXsrv_open *op = NULL;
 425
 426         ZERO_STRUCT(out_context_blobs);
 427
 428         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 429                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 430         } else {
 431                 requested_oplock_level = in_oplock_level;
 432         }
 433
 434
 435         if (smb2req->subreq == NULL) {
 436                 /* New create call. */
 437                 req = tevent_req_create(mem_ctx, &state,
 438                                 struct smbd_smb2_create_state);
 439                 if (req == NULL) {
 440                         return NULL;
 441                 }
 442                 state->smb2req = smb2req;
 443
 444                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 445                 if (tevent_req_nomem(smb1req, req)) {
 446                         return tevent_req_post(req, ev);
 447                 }
 448                 state->smb1req = smb1req;
 449                 smb2req->subreq = req;
 450                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 451                         in_name));
 452         } else {
 453                 /* Re-entrant create call. */
 454                 req = smb2req->subreq;
 455                 state = tevent_req_data(req,
 456                                 struct smbd_smb2_create_state);
 457                 smb1req = state->smb1req;
 458                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 459                         in_name ));
 460         }
 461
 462         dhnc = smb2_create_blob_find(&in_context_blobs,
 463                                      SMB2_CREATE_TAG_DHNC);
 464
 465         if (dhnc) {
 466                 if (dhnc->data.length != 16) {
 467                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 468                         return tevent_req_post(req, ev);
 469                 }
 470                 if (in_context_blobs.num_blobs != 1) {
 471                         /*
 472                          * DHNC should be the only one.
 473                          */
 474                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 475                         return tevent_req_post(req, ev);
 476                 }
 477         }
 478
 479         dh2c = smb2_create_blob_find(&in_context_blobs,
 480                                      SMB2_CREATE_TAG_DH2C);
 481         if (dh2c) {
 482                 if (dh2c->data.length != 36) {
 483                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 484                         return tevent_req_post(req, ev);
 485                 }
 486                 if (in_context_blobs.num_blobs != 1) {
 487                         /*
 488                          * DH2C should be the only one.
 489                          */
 490                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 491                         return tevent_req_post(req, ev);
 492                 }
 493         }
 494
 495         if (IS_IPC(smb1req->conn)) {
 496                 const char *pipe_name = in_name;
 497
 498                 if (dhnc || dh2c) {
 499                         /* durable handles are not supported on IPC$ */
 500                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 501                         return tevent_req_post(req, ev);
 502                 }
 503
 504                 if (!lp_nt_pipe_support()) {
 505                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 506                         return tevent_req_post(req, ev);
 507                 }
 508
 509                 status = open_np_file(smb1req, pipe_name, &result);
 510                 if (!NT_STATUS_IS_OK(status)) {
 511                         tevent_req_nterror(req, status);
 512                         return tevent_req_post(req, ev);
 513                 }
 514                 info = FILE_WAS_OPENED;
 515         } else if (CAN_PRINT(smb1req->conn)) {
 516                 if (dhnc || dh2c) {
 517                         /* durable handles are not supported on printers */
 518                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 519                         return tevent_req_post(req, ev);
 520                 }
 521
 522                 status = file_new(smb1req, smb1req->conn, &result);
 523                 if(!NT_STATUS_IS_OK(status)) {
 524                         tevent_req_nterror(req, status);
 525                         return tevent_req_post(req, ev);
 526                 }
 527
 528                 status = print_spool_open(result, in_name,
 529                                           smb1req->vuid);
 530                 if (!NT_STATUS_IS_OK(status)) {
 531                         file_free(smb1req, result);
 532                         tevent_req_nterror(req, status);
 533                         return tevent_req_post(req, ev);
 534                 }
 535                 info = FILE_WAS_CREATED;
 536         } else {
 537                 char *fname;
 538                 struct smb2_create_blob *exta = NULL;
 539                 struct ea_list *ea_list = NULL;
 540                 struct smb2_create_blob *mxac = NULL;
 541                 NTTIME max_access_time = 0;
 542                 struct smb2_create_blob *secd = NULL;
 543                 struct security_descriptor *sec_desc = NULL;
 544                 struct smb2_create_blob *dhnq = NULL;
 545                 struct smb2_create_blob *alsi = NULL;
 546                 uint64_t allocation_size = 0;
 547                 struct smb2_create_blob *twrp = NULL;
 548                 struct smb2_create_blob *qfid = NULL;
 549                 struct GUID create_guid = GUID_zero();
 550                 bool update_open = false;
 551                 bool durable_requested = false;
 552                 uint32_t durable_timeout_msec = 0;
 553                 bool do_durable_reconnect = false;
 554                 struct smb2_create_blob *dh2q = NULL;
 555
 556                 exta = smb2_create_blob_find(&in_context_blobs,
 557                                              SMB2_CREATE_TAG_EXTA);
 558                 mxac = smb2_create_blob_find(&in_context_blobs,
 559                                              SMB2_CREATE_TAG_MXAC);
 560                 secd = smb2_create_blob_find(&in_context_blobs,
 561                                              SMB2_CREATE_TAG_SECD);
 562                 dhnq = smb2_create_blob_find(&in_context_blobs,
 563                                              SMB2_CREATE_TAG_DHNQ);
 564                 alsi = smb2_create_blob_find(&in_context_blobs,
 565                                              SMB2_CREATE_TAG_ALSI);
 566                 twrp = smb2_create_blob_find(&in_context_blobs,
 567                                              SMB2_CREATE_TAG_TWRP);
 568                 qfid = smb2_create_blob_find(&in_context_blobs,
 569                                              SMB2_CREATE_TAG_QFID);
 570                 dh2q = smb2_create_blob_find(&in_context_blobs,
 571                                              SMB2_CREATE_TAG_DH2Q);
 572
 573                 fname = talloc_strdup(state, in_name);
 574                 if (tevent_req_nomem(fname, req)) {
 575                         return tevent_req_post(req, ev);
 576                 }
 577
 578                 if (exta) {
 579                         ea_list = read_nttrans_ea_list(mem_ctx,
 580                                 (const char *)exta->data.data, exta->data.length);
 581                         if (!ea_list) {
 582                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 583                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 584                                 return tevent_req_post(req, ev);
 585                         }
 586                 }
 587
 588                 if (mxac) {
 589                         if (mxac->data.length == 0) {
 590                                 max_access_time = 0;
 591                         } else if (mxac->data.length == 8) {
 592                                 max_access_time = BVAL(mxac->data.data, 0);
 593                         } else {
 594                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 595                                 return tevent_req_post(req, ev);
 596                         }
 597                 }
 598
 599                 if (secd) {
 600                         enum ndr_err_code ndr_err;
 601
 602                         sec_desc = talloc_zero(state, struct security_descriptor);
 603                         if (tevent_req_nomem(sec_desc, req)) {
 604                                 return tevent_req_post(req, ev);
 605                         }
 606
 607                         ndr_err = ndr_pull_struct_blob(&secd->data,
 608                                 sec_desc, sec_desc,
 609                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 610                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 611                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 612                                          ndr_errstr(ndr_err)));
 613                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 614                                 return tevent_req_post(req, ev);
 615                         }
 616                 }
 617
 618                 if (dhnq) {
 619                         if (dhnq->data.length != 16) {
 620                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 621                                 return tevent_req_post(req, ev);
 622                         }
 623
 624                         if (dh2q) {
 625                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 626                                 return tevent_req_post(req, ev);
 627                         }
 628
 629                         /*
 630                          * durable handle request is processed below.
 631                          */
 632                         durable_requested = true;
 633                         /*
 634                          * Set the timeout to 16 mins.
 635                          *
 636                          * TODO: test this against Windows 2012
 637                          *       as the default for durable v2 is 1 min.
 638                          */
 639                         durable_timeout_msec = (16*60*1000);
 640                 }
 641
 642                 if (dh2q) {
 643                         const uint8_t *p = dh2q->data.data;
 644                         uint32_t durable_v2_timeout = 0;
 645                         DATA_BLOB create_guid_blob;
 646
 647                         if (dh2q->data.length != 32) {
 648                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 649                                 return tevent_req_post(req, ev);
 650                         }
 651
 652                         if (dhnq) {
 653                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 654                                 return tevent_req_post(req, ev);
 655                         }
 656
 657                         durable_v2_timeout = IVAL(p, 0);
 658                         create_guid_blob = data_blob_const(p + 16, 16);
 659
 660                         status = GUID_from_ndr_blob(&create_guid_blob,
 661                                                     &create_guid);
 662                         if (tevent_req_nterror(req, status)) {
 663                                 return tevent_req_post(req, ev);
 664                         }
 665                         /*
 666                          * we need to store the create_guid later
 667                          */
 668                         update_open = true;
 669
 670                         /*
 671                          * durable handle v2 request processed below
 672                          */
 673                         durable_requested = true;
 674                         durable_timeout_msec = durable_v2_timeout;
 675                         if (durable_timeout_msec == 0) {
 676                                 /*
 677                                  * Set the timeout to 1 min as default.
 678                                  *
 679                                  * This matches Windows 2012.
 680                                  */
 681                                 durable_timeout_msec = (60*1000);
 682                         }
 683                 }
 684
 685                 if (dhnc) {
 686                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 687                         uint64_t persistent_id;
 688
 689                         persistent_id = BVAL(dhnc->data.data, 0);
 690
 691                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 692                                                 smb1req->conn->session_info,
 693                                                 persistent_id, create_guid,
 694                                                 now, &op);
 695                         if (!NT_STATUS_IS_OK(status)) {
 696                                 DEBUG(3, ("smbd_smb2_create_send: "
 697                                           "smb2srv_open_recreate v1 failed: %s\n",
 698                                           nt_errstr(status)));
 699                                 tevent_req_nterror(req, status);
 700                                 return tevent_req_post(req, ev);
 701                         }
 702
 703                         DEBUG(10, ("smb2_create_send: DHNC: %s recreate the "
 704                                    "smb2srv_open struct for a durable handle.\n",
 705                                    op->global->durable ? "did" : "could not"));
 706
 707                         if (!op->global->durable) {
 708                                 talloc_free(op);
 709                                 tevent_req_nterror(req,
 710                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 711                                 return tevent_req_post(req, ev);
 712                         }
 713
 714                         do_durable_reconnect = true;
 715                 }
 716
 717                 if (dh2c) {
 718                         const uint8_t *p = dh2c->data.data;
 719                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 720                         uint64_t persistent_id;
 721                         DATA_BLOB create_guid_blob;
 722
 723                         persistent_id = BVAL(p, 0);
 724                         create_guid_blob = data_blob_const(p + 16, 16);
 725
 726                         status = GUID_from_ndr_blob(&create_guid_blob,
 727                                                     &create_guid);
 728                         if (tevent_req_nterror(req, status)) {
 729                                 return tevent_req_post(req, ev);
 730                         }
 731
 732                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 733                                                        smb1req->conn->session_info,
 734                                                        persistent_id, create_guid,
 735                                                        now, &op);
 736                         if (!NT_STATUS_IS_OK(status)) {
 737                                 DEBUG(3, ("smbd_smb2_create_send: "
 738                                           "smb2srv_open_recreate v2 failed: %s\n",
 739                                           nt_errstr(status)));
 740                                 tevent_req_nterror(req, status);
 741                                 return tevent_req_post(req, ev);
 742                         }
 743
 744                         DEBUG(10, ("smb2_create_send: DH2C: %s recreate the "
 745                                    "smb2srv_open struct for a durable handle.\n",
 746                                    op->global->durable ? "did" : "could not"));
 747
 748                         if (!op->global->durable) {
 749                                 talloc_free(op);
 750                                 tevent_req_nterror(req,
 751                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 752                                 return tevent_req_post(req, ev);
 753                         }
 754
 755                         do_durable_reconnect = true;
 756                 }
 757
 758                 if (alsi) {
 759                         if (alsi->data.length != 8) {
 760                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 761                                 return tevent_req_post(req, ev);
 762                         }
 763                         allocation_size = BVAL(alsi->data.data, 0);
 764                 }
 765
 766                 if (twrp) {
 767                         NTTIME nttime;
 768                         time_t t;
 769                         struct tm *tm;
 770
 771                         if (twrp->data.length != 8) {
 772                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 773                                 return tevent_req_post(req, ev);
 774                         }
 775
 776                         nttime = BVAL(twrp->data.data, 0);
 777                         t = nt_time_to_unix(nttime);
 778                         tm = gmtime(&t);
 779
 780                         TALLOC_FREE(fname);
 781                         fname = talloc_asprintf(state,
 782                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 783                                         tm->tm_year + 1900,
 784                                         tm->tm_mon + 1,
 785                                         tm->tm_mday,
 786                                         tm->tm_hour,
 787                                         tm->tm_min,
 788                                         tm->tm_sec,
 789                                         in_name);
 790                         if (tevent_req_nomem(fname, req)) {
 791                                 return tevent_req_post(req, ev);
 792                         }
 793                 }
 794
 795                 if (qfid) {
 796                         if (qfid->data.length != 0) {
 797                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 798                                 return tevent_req_post(req, ev);
 799                         }
 800                 }
 801
 802                 /* these are ignored for SMB2 */
 803                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 804                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 805
 806                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 807
 808                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 809
 810                 /*
 811                  * For the backend file open procedure, there are
 812                  * two possible modes: durable_reconnect or not.
 813                  */
 814                 if (do_durable_reconnect) {
 815                         DATA_BLOB new_cookie = data_blob_null;
 816
 817                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 818                                                 smb1req,
 819                                                 op,
 820                                                 op->global->backend_cookie,
 821                                                 op, &result, &new_cookie);
 822                         if (!NT_STATUS_IS_OK(status)) {
 823                                 NTSTATUS return_status;
 824
 825                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 826
 827                                 DEBUG(3, ("smbd_smb2_create_send: "
 828                                           "durable_reconnect failed: %s => %s\n",
 829                                           nt_errstr(status),
 830                                           nt_errstr(return_status)));
 831
 832                                 tevent_req_nterror(req, return_status);
 833                                 return tevent_req_post(req, ev);
 834                         }
 835
 836                         data_blob_free(&op->global->backend_cookie);
 837                         op->global->backend_cookie = new_cookie;
 838
 839                         op->status = NT_STATUS_OK;
 840                         op->global->disconnect_time = 0;
 841
 842                         /* save the timout for later update */
 843                         durable_timeout_msec = op->global->durable_timeout_msec;
 844
 845                         update_open = true;
 846
 847                         info = FILE_WAS_OPENED;
 848                 } else {
 849                         struct smb_filename *smb_fname = NULL;
 850
 851                         /*
 852                          * For a DFS path the function parse_dfs_path()
 853                          * will do the path processing.
 854                          */
 855
 856                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 857                                 /* convert '\\' into '/' */
 858                                 status = check_path_syntax(fname);
 859                                 if (!NT_STATUS_IS_OK(status)) {
 860                                         tevent_req_nterror(req, status);
 861                                         return tevent_req_post(req, ev);
 862                                 }
 863                         }
 864
 865                         status = filename_convert(req,
 866                                                   smb1req->conn,
 867                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 868                                                   fname,
 869                                                   0,    /* unix_convert flags */
 870                                                   NULL, /* ppath_contains_wcards */
 871                                                   &smb_fname);
 872                         if (!NT_STATUS_IS_OK(status)) {
 873                                 tevent_req_nterror(req, status);
 874                                 return tevent_req_post(req, ev);
 875                         }
 876
 877                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 878                                                      smb1req,
 879                                                      0, /* root_dir_fid */
 880                                                      smb_fname,
 881                                                      in_desired_access,
 882                                                      in_share_access,
 883                                                      in_create_disposition,
 884                                                      in_create_options,
 885                                                      in_file_attributes,
 886                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 887                                                      allocation_size,
 888                                                      0, /* private_flags */
 889                                                      sec_desc,
 890                                                      ea_list,
 891                                                      &result,
 892                                                      &info);
 893                         if (!NT_STATUS_IS_OK(status)) {
 894                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 895                                         return req;
 896                                 }
 897                                 tevent_req_nterror(req, status);
 898                                 return tevent_req_post(req, ev);
 899                         }
 900                         op = result->op;
 901                 }
 902
 903                 /*
 904                  * here we have op == result->op
 905                  */
 906
 907                 DEBUG(10, ("smbd_smb2_create_send: "
 908                            "response construction phase\n"));
 909
 910                 if (mxac) {
 911                         NTTIME last_write_time;
 912
 913                         unix_timespec_to_nt_time(&last_write_time,
 914                                                  result->fsp_name->st.st_ex_mtime);
 915                         if (last_write_time != max_access_time) {
 916                                 uint8_t p[8];
 917                                 uint32_t max_access_granted;
 918                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 919
 920                                 status = smbd_calculate_access_mask(smb1req->conn,
 921                                                         result->fsp_name,
 922                                                         false,
 923                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 924                                                         &max_access_granted);
 925
 926                                 SIVAL(p, 0, NT_STATUS_V(status));
 927                                 SIVAL(p, 4, max_access_granted);
 928
 929                                 status = smb2_create_blob_add(state,
 930                                                         &out_context_blobs,
 931                                                         SMB2_CREATE_TAG_MXAC,
 932                                                         blob);
 933                                 if (!NT_STATUS_IS_OK(status)) {
 934                                         tevent_req_nterror(req, status);
 935                                         return tevent_req_post(req, ev);
 936                                 }
 937                         }
 938                 }
 939
 940                 if (durable_requested &&
 941                     BATCH_OPLOCK_TYPE(result->oplock_type))
 942                 {
 943                         status = SMB_VFS_DURABLE_COOKIE(result,
 944                                                 op,
 945                                                 &op->global->backend_cookie);
 946                         if (!NT_STATUS_IS_OK(status)) {
 947                                 op->global->backend_cookie = data_blob_null;
 948                         }
 949                 }
 950                 if (op->global->backend_cookie.length > 0) {
 951                         update_open = true;
 952
 953                         op->global->durable = true;
 954                         op->global->durable_timeout_msec = durable_timeout_msec;
 955                 }
 956
 957                 if (update_open) {
 958                         op->global->create_guid = create_guid;
 959
 960                         status = smbXsrv_open_update(op);
 961                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 962                                    "returned %s\n",
 963                                    nt_errstr(status)));
 964                         if (!NT_STATUS_IS_OK(status)) {
 965                                 tevent_req_nterror(req, status);
 966                                 return tevent_req_post(req, ev);
 967                         }
 968                 }
 969
 970                 if (dhnq && op->global->durable) {
 971                         uint8_t p[8] = { 0, };
 972                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 973
 974                         status = smb2_create_blob_add(state,
 975                                                       &out_context_blobs,
 976                                                       SMB2_CREATE_TAG_DHNQ,
 977                                                       blob);
 978                         if (!NT_STATUS_IS_OK(status)) {
 979                                 tevent_req_nterror(req, status);
 980                                 return tevent_req_post(req, ev);
 981                         }
 982                 }
 983
 984                 if (dh2q && op->global->durable) {
 985                         uint8_t p[8] = { 0, };
 986                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 987                         uint32_t durable_v2_response_flags = 0;
 988
 989                         SIVAL(p, 0, op->global->durable_timeout_msec);
 990                         SIVAL(p, 4, durable_v2_response_flags);
 991
 992                         status = smb2_create_blob_add(state, &out_context_blobs,
 993                                                       SMB2_CREATE_TAG_DH2Q,
 994                                                       blob);
 995                         if (!NT_STATUS_IS_OK(status)) {
 996                                 tevent_req_nterror(req, status);
 997                                 return tevent_req_post(req, ev);
 998                         }
 999                 }
1000
1001                 if (qfid) {
1002                         uint8_t p[32];
1003                         uint64_t file_index = get_FileIndex(result->conn,
1004                                                         &result->fsp_name->st);
1005                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1006
1007                         ZERO_STRUCT(p);
1008
1009                         /* From conversations with Microsoft engineers at
1010                            the MS plugfest. The first 8 bytes are the "volume index"
1011                            == inode, the second 8 bytes are the "volume id",
1012                            == dev. This will be updated in the SMB2 doc. */
1013                         SBVAL(p, 0, file_index);
1014                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1015
1016                         status = smb2_create_blob_add(state, &out_context_blobs,
1017                                                       SMB2_CREATE_TAG_QFID,
1018                                                       blob);
1019                         if (!NT_STATUS_IS_OK(status)) {
1020                                 tevent_req_nterror(req, status);
1021                                 return tevent_req_post(req, ev);
1022                         }
1023                 }
1024         }
1025
1026         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1027
1028         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1029                 state->out_oplock_level = in_oplock_level;
1030         } else {
1031                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1032         }
1033
1034         if ((in_create_disposition == FILE_SUPERSEDE)
1035             && (info == FILE_WAS_OVERWRITTEN)) {
1036                 state->out_create_action = FILE_WAS_SUPERSEDED;
1037         } else {
1038                 state->out_create_action = info;
1039         }
1040         state->out_file_attributes = dos_mode(result->conn,
1041                                            result->fsp_name);
1042         /* Deal with other possible opens having a modified
1043            write time. JRA. */
1044         ZERO_STRUCT(write_time_ts);
1045         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1046         if (!null_timespec(write_time_ts)) {
1047                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1048         }
1049
1050         unix_timespec_to_nt_time(&state->out_creation_time,
1051                         get_create_timespec(smb1req->conn, result,
1052                                         result->fsp_name));
1053         unix_timespec_to_nt_time(&state->out_last_access_time,
1054                         result->fsp_name->st.st_ex_atime);
1055         unix_timespec_to_nt_time(&state->out_last_write_time,
1056                         result->fsp_name->st.st_ex_mtime);
1057         unix_timespec_to_nt_time(&state->out_change_time,
1058                         get_change_timespec(smb1req->conn, result,
1059                                         result->fsp_name));
1060         state->out_allocation_size =
1061                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1062                                                &(result->fsp_name->st));
1063         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1064         if (state->out_file_attributes == 0) {
1065                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1066         }
1067         state->out_file_id_persistent = result->op->global->open_persistent_id;
1068         state->out_file_id_volatile = result->op->global->open_volatile_id;
1069         state->out_context_blobs = out_context_blobs;
1070
1071         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1072                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1073
1074         tevent_req_done(req);
1075         return tevent_req_post(req, ev);
1076 }
1077
1078 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1079                         TALLOC_CTX *mem_ctx,
1080                         uint8_t *out_oplock_level,
1081                         uint32_t *out_create_action,
1082                         NTTIME *out_creation_time,
1083                         NTTIME *out_last_access_time,
1084                         NTTIME *out_last_write_time,
1085                         NTTIME *out_change_time,
1086                         uint64_t *out_allocation_size,
1087                         uint64_t *out_end_of_file,
1088                         uint32_t *out_file_attributes,
1089                         uint64_t *out_file_id_persistent,
1090                         uint64_t *out_file_id_volatile,
1091                         struct smb2_create_blobs *out_context_blobs)
1092 {
1093         NTSTATUS status;
1094         struct smbd_smb2_create_state *state = tevent_req_data(req,
1095                                                struct smbd_smb2_create_state);
1096
1097         if (tevent_req_is_nterror(req, &status)) {
1098                 tevent_req_received(req);
1099                 return status;
1100         }
1101
1102         *out_oplock_level       = state->out_oplock_level;
1103         *out_create_action      = state->out_create_action;
1104         *out_creation_time      = state->out_creation_time;
1105         *out_last_access_time   = state->out_last_access_time;
1106         *out_last_write_time    = state->out_last_write_time;
1107         *out_change_time        = state->out_change_time;
1108         *out_allocation_size    = state->out_allocation_size;
1109         *out_end_of_file        = state->out_end_of_file;
1110         *out_file_attributes    = state->out_file_attributes;
1111         *out_file_id_persistent = state->out_file_id_persistent;
1112         *out_file_id_volatile   = state->out_file_id_volatile;
1113         *out_context_blobs      = state->out_context_blobs;
1114
1115         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1116
1117         tevent_req_received(req);
1118         return NT_STATUS_OK;
1119 }
1120
1121 /*********************************************************
1122  Code for dealing with deferred opens.
1123 *********************************************************/
1124
1125 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1126                         struct timeval *p_request_time,
1127                         void **pp_state)
1128 {
1129         struct smbd_smb2_create_state *state = NULL;
1130         struct tevent_req *req = NULL;
1131
1132         if (!smb2req) {
1133                 return false;
1134         }
1135         req = smb2req->subreq;
1136         if (!req) {
1137                 return false;
1138         }
1139         state = tevent_req_data(req, struct smbd_smb2_create_state);
1140         if (!state) {
1141                 return false;
1142         }
1143         if (!state->open_was_deferred) {
1144                 return false;
1145         }
1146         if (p_request_time) {
1147                 *p_request_time = state->request_time;
1148         }
1149         if (pp_state) {
1150                 *pp_state = (void *)state->private_data.data;
1151         }
1152         return true;
1153 }
1154
1155 /*********************************************************
1156  Re-process this call early - requested by message or
1157  close.
1158 *********************************************************/
1159
1160 static struct smbd_smb2_request *find_open_smb2req(
1161         struct smbd_server_connection *sconn, uint64_t mid)
1162 {
1163         struct smbd_smb2_request *smb2req;
1164
1165         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1166                 uint64_t message_id;
1167                 if (smb2req->subreq == NULL) {
1168                         /* This message has been processed. */
1169                         continue;
1170                 }
1171                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1172                         /* This message has been processed. */
1173                         continue;
1174                 }
1175                 message_id = get_mid_from_smb2req(smb2req);
1176                 if (message_id == mid) {
1177                         return smb2req;
1178                 }
1179         }
1180         return NULL;
1181 }
1182
1183 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1184 {
1185         struct smbd_smb2_create_state *state = NULL;
1186         struct smbd_smb2_request *smb2req;
1187
1188         smb2req = find_open_smb2req(sconn, mid);
1189
1190         if (!smb2req) {
1191                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1192                         (unsigned long long)mid));
1193                 return false;
1194         }
1195         if (!smb2req->subreq) {
1196                 return false;
1197         }
1198         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1199                 return false;
1200         }
1201         state = tevent_req_data(smb2req->subreq,
1202                         struct smbd_smb2_create_state);
1203         if (!state) {
1204                 return false;
1205         }
1206         /* It's not in progress if there's no timeout event. */
1207         if (!state->open_was_deferred) {
1208                 return false;
1209         }
1210
1211         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1212                         (unsigned long long)mid));
1213
1214         return true;
1215 }
1216
1217 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1218                                                         uint64_t mid)
1219 {
1220         struct smbd_smb2_create_state *state = NULL;
1221
1222         if (!smb2req->subreq) {
1223                 return;
1224         }
1225         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1226                 return;
1227         }
1228         state = tevent_req_data(smb2req->subreq,
1229                         struct smbd_smb2_create_state);
1230         if (!state) {
1231                 return;
1232         }
1233
1234         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1235                 "mid %llu\n",
1236                 (unsigned long long)mid ));
1237
1238         state->open_was_deferred = false;
1239         /* Ensure we don't have any outstanding timer event. */
1240         TALLOC_FREE(state->te);
1241         /* Ensure we don't have any outstanding immediate event. */
1242         TALLOC_FREE(state->im);
1243 }
1244
1245 void remove_deferred_open_message_smb2(
1246         struct smbd_server_connection *sconn, uint64_t mid)
1247 {
1248         struct smbd_smb2_request *smb2req;
1249
1250         smb2req = find_open_smb2req(sconn, mid);
1251
1252         if (!smb2req) {
1253                 DEBUG(10,("remove_deferred_open_message_smb2: "
1254                         "can't find mid %llu\n",
1255                         (unsigned long long)mid ));
1256                 return;
1257         }
1258         remove_deferred_open_message_smb2_internal(smb2req, mid);
1259 }
1260
1261 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1262                                         struct tevent_immediate *im,
1263                                         void *private_data)
1264 {
1265         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1266                                         struct smbd_smb2_request);
1267         struct smbd_server_connection *sconn = smb2req->sconn;
1268         uint64_t mid = get_mid_from_smb2req(smb2req);
1269         NTSTATUS status;
1270
1271         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1272                 "re-dispatching mid %llu\n",
1273                 (unsigned long long)mid ));
1274
1275         status = smbd_smb2_request_dispatch(smb2req);
1276         if (!NT_STATUS_IS_OK(status)) {
1277                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1278                 return;
1279         }
1280 }
1281
1282 bool schedule_deferred_open_message_smb2(
1283         struct smbd_server_connection *sconn, uint64_t mid)
1284 {
1285         struct smbd_smb2_create_state *state = NULL;
1286         struct smbd_smb2_request *smb2req;
1287
1288         smb2req = find_open_smb2req(sconn, mid);
1289
1290         if (!smb2req) {
1291                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1292                         "can't find mid %llu\n",
1293                         (unsigned long long)mid ));
1294                 return false;
1295         }
1296         if (!smb2req->subreq) {
1297                 return false;
1298         }
1299         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1300                 return false;
1301         }
1302         state = tevent_req_data(smb2req->subreq,
1303                         struct smbd_smb2_create_state);
1304         if (!state) {
1305                 return false;
1306         }
1307
1308         /* Ensure we don't have any outstanding timer event. */
1309         TALLOC_FREE(state->te);
1310         /* Ensure we don't have any outstanding immediate event. */
1311         TALLOC_FREE(state->im);
1312
1313         /*
1314          * This is subtle. We must null out the callback
1315          * before rescheduling, else the first call to
1316          * tevent_req_nterror() causes the _receive()
1317          * function to be called, this causing tevent_req_post()
1318          * to crash.
1319          */
1320         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1321
1322         state->im = tevent_create_immediate(smb2req);
1323         if (!state->im) {
1324                 smbd_server_connection_terminate(smb2req->sconn,
1325                         nt_errstr(NT_STATUS_NO_MEMORY));
1326                 return false;
1327         }
1328
1329         DEBUG(10,("schedule_deferred_open_message_smb2: "
1330                 "re-processing mid %llu\n",
1331                 (unsigned long long)mid ));
1332
1333         tevent_schedule_immediate(state->im,
1334                         smb2req->sconn->ev_ctx,
1335                         smbd_smb2_create_request_dispatch_immediate,
1336                         smb2req);
1337
1338         return true;
1339 }
1340
1341 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1342 {
1343         struct smbd_smb2_request *smb2req = NULL;
1344         struct smbd_smb2_create_state *state = tevent_req_data(req,
1345                                 struct smbd_smb2_create_state);
1346         uint64_t mid;
1347
1348         if (!state) {
1349                 return false;
1350         }
1351
1352         if (!state->smb2req) {
1353                 return false;
1354         }
1355
1356         smb2req = state->smb2req;
1357         mid = get_mid_from_smb2req(smb2req);
1358
1359         if (is_deferred_open_async(state->private_data.data)) {
1360                 /* Can't cancel an async create. */
1361                 return false;
1362         }
1363
1364         remove_deferred_open_message_smb2_internal(smb2req, mid);
1365
1366         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1367         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1368         return true;
1369 }
1370
1371 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1372                                 struct timeval request_time,
1373                                 struct timeval timeout,
1374                                 struct file_id id,
1375                                 char *private_data,
1376                                 size_t priv_len)
1377 {
1378         struct tevent_req *req = NULL;
1379         struct smbd_smb2_create_state *state = NULL;
1380         struct timeval end_time;
1381
1382         if (!smb2req) {
1383                 return false;
1384         }
1385         req = smb2req->subreq;
1386         if (!req) {
1387                 return false;
1388         }
1389         state = tevent_req_data(req, struct smbd_smb2_create_state);
1390         if (!state) {
1391                 return false;
1392         }
1393         state->id = id;
1394         state->request_time = request_time;
1395         state->private_data = data_blob_talloc(state, private_data,
1396                                                 priv_len);
1397         if (!state->private_data.data) {
1398                 return false;
1399         }
1400
1401         /* Re-schedule us to retry on timer expiry. */
1402         end_time = timeval_sum(&request_time, &timeout);
1403
1404         DEBUG(10,("push_deferred_open_message_smb2: "
1405                 "timeout at %s\n",
1406                 timeval_string(talloc_tos(),
1407                                 &end_time,
1408                                 true) ));
1409
1410         state->open_was_deferred = true;
1411
1412         /* allow this request to be canceled */
1413         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1414
1415         return true;
1416 }