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