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 #include "librpc/gen_ndr/open_files.h"
  31 #include "serverid.h"
  32
  33 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  34 {
  35         switch(in_oplock_level) {
  36         case SMB2_OPLOCK_LEVEL_NONE:
  37                 return NO_OPLOCK;
  38         case SMB2_OPLOCK_LEVEL_II:
  39                 return LEVEL_II_OPLOCK;
  40         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  41                 return EXCLUSIVE_OPLOCK;
  42         case SMB2_OPLOCK_LEVEL_BATCH:
  43                 return BATCH_OPLOCK;
  44         case SMB2_OPLOCK_LEVEL_LEASE:
  45                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  46                         "LEASE_OPLOCK_REQUESTED\n"));
  47                 return NO_OPLOCK;
  48         default:
  49                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  50                         "unknown level %u\n",
  51                         (unsigned int)in_oplock_level));
  52                 return NO_OPLOCK;
  53         }
  54 }
  55
  56 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  57 {
  58         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  59                 return SMB2_OPLOCK_LEVEL_BATCH;
  60         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  61                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  62         } else if (oplock_type == LEVEL_II_OPLOCK) {
  63                 /*
  64                  * Don't use LEVEL_II_OPLOCK_TYPE here as
  65                  * this also includes FAKE_LEVEL_II_OPLOCKs
  66                  * which are internal only.
  67                  */
  68                 return SMB2_OPLOCK_LEVEL_II;
  69         } else {
  70                 return SMB2_OPLOCK_LEVEL_NONE;
  71         }
  72 }
  73
  74 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  75                         struct tevent_context *ev,
  76                         struct smbd_smb2_request *smb2req,
  77                         uint8_t in_oplock_level,
  78                         uint32_t in_impersonation_level,
  79                         uint32_t in_desired_access,
  80                         uint32_t in_file_attributes,
  81                         uint32_t in_share_access,
  82                         uint32_t in_create_disposition,
  83                         uint32_t in_create_options,
  84                         const char *in_name,
  85                         struct smb2_create_blobs in_context_blobs);
  86 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  87                         TALLOC_CTX *mem_ctx,
  88                         uint8_t *out_oplock_level,
  89                         uint32_t *out_create_action,
  90                         NTTIME *out_creation_time,
  91                         NTTIME *out_last_access_time,
  92                         NTTIME *out_last_write_time,
  93                         NTTIME *out_change_time,
  94                         uint64_t *out_allocation_size,
  95                         uint64_t *out_end_of_file,
  96                         uint32_t *out_file_attributes,
  97                         uint64_t *out_file_id_persistent,
  98                         uint64_t *out_file_id_volatile,
  99                         struct smb2_create_blobs *out_context_blobs);
 100
 101 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
 102 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
 103 {
 104         const uint8_t *inbody;
 105         const struct iovec *indyniov;
 106         int i = smb2req->current_idx;
 107         uint8_t in_oplock_level;
 108         uint32_t in_impersonation_level;
 109         uint32_t in_desired_access;
 110         uint32_t in_file_attributes;
 111         uint32_t in_share_access;
 112         uint32_t in_create_disposition;
 113         uint32_t in_create_options;
 114         uint16_t in_name_offset;
 115         uint16_t in_name_length;
 116         DATA_BLOB in_name_buffer;
 117         char *in_name_string;
 118         size_t in_name_string_size;
 119         uint32_t name_offset = 0;
 120         uint32_t name_available_length = 0;
 121         uint32_t in_context_offset;
 122         uint32_t in_context_length;
 123         DATA_BLOB in_context_buffer;
 124         struct smb2_create_blobs in_context_blobs;
 125         uint32_t context_offset = 0;
 126         uint32_t context_available_length = 0;
 127         uint32_t dyn_offset;
 128         NTSTATUS status;
 129         bool ok;
 130         struct tevent_req *tsubreq;
 131
 132         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 133         if (!NT_STATUS_IS_OK(status)) {
 134                 return smbd_smb2_request_error(smb2req, status);
 135         }
 136         inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
 137
 138         in_oplock_level         = CVAL(inbody, 0x03);
 139         in_impersonation_level  = IVAL(inbody, 0x04);
 140         in_desired_access       = IVAL(inbody, 0x18);
 141         in_file_attributes      = IVAL(inbody, 0x1C);
 142         in_share_access         = IVAL(inbody, 0x20);
 143         in_create_disposition   = IVAL(inbody, 0x24);
 144         in_create_options       = IVAL(inbody, 0x28);
 145         in_name_offset          = SVAL(inbody, 0x2C);
 146         in_name_length          = SVAL(inbody, 0x2E);
 147         in_context_offset       = IVAL(inbody, 0x30);
 148         in_context_length       = IVAL(inbody, 0x34);
 149
 150         /*
 151          * First check if the dynamic name and context buffers
 152          * are correctly specified.
 153          *
 154          * Note: That we don't check if the name and context buffers
 155          *       overlap
 156          */
 157
 158         dyn_offset = SMB2_HDR_BODY + smb2req->in.vector[i+1].iov_len;
 159
 160         if (in_name_offset == 0 && in_name_length == 0) {
 161                 /* This is ok */
 162                 name_offset = 0;
 163         } else if (in_name_offset < dyn_offset) {
 164                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 165         } else {
 166                 name_offset = in_name_offset - dyn_offset;
 167         }
 168
 169         indyniov = &smb2req->in.vector[i+2];
 170
 171         if (name_offset > indyniov->iov_len) {
 172                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 173         }
 174
 175         name_available_length = indyniov->iov_len - name_offset;
 176
 177         if (in_name_length > name_available_length) {
 178                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 179         }
 180
 181         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 182         in_name_buffer.length = in_name_length;
 183
 184         if (in_context_offset == 0 && in_context_length == 0) {
 185                 /* This is ok */
 186                 context_offset = 0;
 187         } else if (in_context_offset < dyn_offset) {
 188                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 189         } else {
 190                 context_offset = in_context_offset - dyn_offset;
 191         }
 192
 193         if (context_offset > indyniov->iov_len) {
 194                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 195         }
 196
 197         context_available_length = indyniov->iov_len - context_offset;
 198
 199         if (in_context_length > context_available_length) {
 200                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 201         }
 202
 203         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 204                 context_offset;
 205         in_context_buffer.length = in_context_length;
 206
 207         /*
 208          * Now interpret the name and context buffers
 209          */
 210
 211         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 212                                    in_name_buffer.data,
 213                                    in_name_buffer.length,
 214                                    &in_name_string,
 215                                    &in_name_string_size);
 216         if (!ok) {
 217                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 218         }
 219
 220         if (in_name_buffer.length == 0) {
 221                 in_name_string_size = 0;
 222         }
 223
 224         if (strlen(in_name_string) != in_name_string_size) {
 225                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 226         }
 227
 228         ZERO_STRUCT(in_context_blobs);
 229         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 230         if (!NT_STATUS_IS_OK(status)) {
 231                 return smbd_smb2_request_error(smb2req, status);
 232         }
 233
 234         tsubreq = smbd_smb2_create_send(smb2req,
 235                                        smb2req->sconn->ev_ctx,
 236                                        smb2req,
 237                                        in_oplock_level,
 238                                        in_impersonation_level,
 239                                        in_desired_access,
 240                                        in_file_attributes,
 241                                        in_share_access,
 242                                        in_create_disposition,
 243                                        in_create_options,
 244                                        in_name_string,
 245                                        in_context_blobs);
 246         if (tsubreq == NULL) {
 247                 smb2req->subreq = NULL;
 248                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 249         }
 250         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 251
 252         /*
 253          * For now we keep the logic that we do not send STATUS_PENDING
 254          * for sharing violations, so we just wait 2 seconds.
 255          *
 256          * TODO: we need more tests for this.
 257          */
 258         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 259 }
 260
 261 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 262 {
 263         uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
 264         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 265 }
 266
 267 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 268 {
 269         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 270                                         struct smbd_smb2_request);
 271         DATA_BLOB outbody;
 272         DATA_BLOB outdyn;
 273         uint8_t out_oplock_level = 0;
 274         uint32_t out_create_action = 0;
 275         NTTIME out_creation_time = 0;
 276         NTTIME out_last_access_time = 0;
 277         NTTIME out_last_write_time = 0;
 278         NTTIME out_change_time = 0;
 279         uint64_t out_allocation_size = 0;
 280         uint64_t out_end_of_file = 0;
 281         uint32_t out_file_attributes = 0;
 282         uint64_t out_file_id_persistent = 0;
 283         uint64_t out_file_id_volatile = 0;
 284         struct smb2_create_blobs out_context_blobs;
 285         DATA_BLOB out_context_buffer;
 286         uint16_t out_context_buffer_offset = 0;
 287         NTSTATUS status;
 288         NTSTATUS error; /* transport error */
 289
 290         if (smb2req->cancelled) {
 291                 uint64_t mid = get_mid_from_smb2req(smb2req);
 292                 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
 293                         (unsigned long long)mid ));
 294                 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
 295                 if (!NT_STATUS_IS_OK(error)) {
 296                         smbd_server_connection_terminate(smb2req->sconn,
 297                                 nt_errstr(error));
 298                         return;
 299                 }
 300                 return;
 301         }
 302
 303         status = smbd_smb2_create_recv(tsubreq,
 304                                        smb2req,
 305                                        &out_oplock_level,
 306                                        &out_create_action,
 307                                        &out_creation_time,
 308                                        &out_last_access_time,
 309                                        &out_last_write_time,
 310                                        &out_change_time,
 311                                        &out_allocation_size,
 312                                        &out_end_of_file,
 313                                        &out_file_attributes,
 314                                        &out_file_id_persistent,
 315                                        &out_file_id_volatile,
 316                                        &out_context_blobs);
 317         if (!NT_STATUS_IS_OK(status)) {
 318                 error = smbd_smb2_request_error(smb2req, status);
 319                 if (!NT_STATUS_IS_OK(error)) {
 320                         smbd_server_connection_terminate(smb2req->sconn,
 321                                                          nt_errstr(error));
 322                         return;
 323                 }
 324                 return;
 325         }
 326
 327         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 328         if (!NT_STATUS_IS_OK(status)) {
 329                 error = smbd_smb2_request_error(smb2req, status);
 330                 if (!NT_STATUS_IS_OK(error)) {
 331                         smbd_server_connection_terminate(smb2req->sconn,
 332                                                          nt_errstr(error));
 333                         return;
 334                 }
 335                 return;
 336         }
 337
 338         if (out_context_buffer.length > 0) {
 339                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 340         }
 341
 342         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 343         if (outbody.data == NULL) {
 344                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 345                 if (!NT_STATUS_IS_OK(error)) {
 346                         smbd_server_connection_terminate(smb2req->sconn,
 347                                                          nt_errstr(error));
 348                         return;
 349                 }
 350                 return;
 351         }
 352
 353         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 354         SCVAL(outbody.data, 0x02,
 355               out_oplock_level);                /* oplock level */
 356         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 357         SIVAL(outbody.data, 0x04,
 358               out_create_action);               /* create action */
 359         SBVAL(outbody.data, 0x08,
 360               out_creation_time);               /* creation time */
 361         SBVAL(outbody.data, 0x10,
 362               out_last_access_time);            /* last access time */
 363         SBVAL(outbody.data, 0x18,
 364               out_last_write_time);             /* last write time */
 365         SBVAL(outbody.data, 0x20,
 366               out_change_time);                 /* change time */
 367         SBVAL(outbody.data, 0x28,
 368               out_allocation_size);             /* allocation size */
 369         SBVAL(outbody.data, 0x30,
 370               out_end_of_file);                 /* end of file */
 371         SIVAL(outbody.data, 0x38,
 372               out_file_attributes);             /* file attributes */
 373         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 374         SBVAL(outbody.data, 0x40,
 375               out_file_id_persistent);          /* file id (persistent) */
 376         SBVAL(outbody.data, 0x48,
 377               out_file_id_volatile);            /* file id (volatile) */
 378         SIVAL(outbody.data, 0x50,
 379               out_context_buffer_offset);       /* create contexts offset */
 380         SIVAL(outbody.data, 0x54,
 381               out_context_buffer.length);       /* create contexts length */
 382
 383         outdyn = out_context_buffer;
 384
 385         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 386         if (!NT_STATUS_IS_OK(error)) {
 387                 smbd_server_connection_terminate(smb2req->sconn,
 388                                                  nt_errstr(error));
 389                 return;
 390         }
 391 }
 392
 393 static NTSTATUS new_durable_reconnect_fsp(struct smbXsrv_open *op,
 394                                           TALLOC_CTX *mem_ctx,
 395                                           files_sruct **_fsp)
 396 {
 397         NTSTATUS status = NT_STATUS_NO_MEMORY;
 398         files_struct *fsp = NULL;
 399         TALLOC_CTX *frame = talloc_stackframe();
 400         struct smbd_server_connection *sconn = op->connection->sconn;
 401
 402         fsp = talloc_zero(frame, struct files_struct);
 403         if (fsp == NULL) {
 404                 goto fail;
 405         }
 406
 407         /*
 408          * This can't be a child of fsp because the file_handle can be ref'd
 409          * when doing a dos/fcb open, which will then share the file_handle
 410          * across multiple fsps.
 411          */
 412         fsp->fh = talloc_zero(frame, struct fd_handle);
 413         if (fsp->fh == NULL) {
 414                 goto fail;
 415         }
 416
 417         status = fsp_set_smb_fname(fsp, /*TODO*/ smb_fname);
 418         if (!NT_STATUS_IS_OK(status)) {
 419                 goto fail;
 420         }
 421
 422         fsp->fh->ref_count = 1;
 423         fsp->fh->fd = -1;
 424         fsp->fh->gen_id = get_gen_count(sconn);
 425
 426         fsp->conn = conn;
 427
 428
 429         /* success */
 430
 431         talloc_steal(mem_ctx, fsp);
 432         talloc_steal(mem_ctx, fsp->fh);
 433         *_fsp = fsp;
 434
 435         status = NT_STATUS_OK;
 436
 437 fail:
 438         talloc_free(frame);
 439         return status;
 440 }
 441
 442 static NTSTATUS smb2_create_durable_reconnect(struct smbXsrv_open *op,
 443                                               struct smb_request *smb1req,
 444
 445                                               TALLOC_CTX *mem_ctx,
 446                                               files_struct **fsp)
 447 {
 448         struct share_mode_lock *sharemode_lock;
 449         files_struct *fsp = NULL;
 450
 451         /* 1. check entry in locking.tdb */
 452
 453         /*
 454          * Q: fetch with lock right away?
 455          */
 456         sharemode_lock = fetch_share_mode_unlocked(mem_ctx,
 457                                                    op->global->backend_file_id);
 458         if (sharemode_lock == NULL) {
 459                 /* TODO: use/create other fetch func with better error code */
 460                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 461         }
 462
 463         if (sharemode_lock->data->num_share_modes == 0) {
 464                 /* should not happen? internal error? */
 465                 return NT_STATUS_INTERNAL_DB_ERROR;
 466         }
 467
 468         if (sharemode_lock->data->num_share_modes > 1) {
 469                 /*
 470                  * It can't be durable if there is more than one handle
 471                  * on the file.
 472                  */
 473                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 474         }
 475
 476         if (serverid_exists(&sharemode_lock->data->share_modes[0].pid))  {
 477                 /*
 478                  * server still exists
 479                  * TODO: check whether session exists
 480                  *  (could have been a session_logoff())
 481                  */
 482                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 483         }
 484
 485         /* 2. proceed with opening file */
 486
 487         /*
 488          * refetch with lock and update the pid
 489          */
 490         talloc_free(sharemode_lock);
 491         sharemode_lock = get_share_mode_lock(mem_ctx,
 492                                              op->global->backend_file_id);
 493         if (sharemode_lock == NULL) {
 494                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 495         }
 496
 497         sharemode_lock->data->share_modes[0].pid =
 498                 messaging_server_id(op->connection->sconn->msg_ctx);
 499
 500         /*
 501          * circumstances seems ok, do the open
 502          */
 503         status = new_durable_reconnect_fsp( &fsp);
 504         if (!NT_STATUS_IS_OK(status)) {
 505                 return status;
 506         }
 507
 508         /* TODO */
 509         fsp->fh->fd = SMB_VFS_OPEN(smb1req->conn,
 510                                    smb_fname,
 511                                    fsp,
 512                                    sharemode_lock->data->share_modes[0].flags,
 513                                    mode);
 514         if (fsp->fh->fd == -1) {
 515                 /* ... */
 516                 return ...;
 517         }
 518
 519         /* - release the sharemode lock: this writes the changes */
 520         talloc_free(sharemode_lock);
 521
 522         /* - update fsp pointer in smbXsrv_open */
 523
 524         op->;
 525
 526         /*
 527          * - return
 528          *
 529          * ... think about seek()
 530          */
 531         return NT_STATUS_NOT_IMPLEMENTED;
 532 }
 533
 534 struct smbd_smb2_create_state {
 535         struct smbd_smb2_request *smb2req;
 536         struct smb_request *smb1req;
 537         struct timed_event *te;
 538         struct tevent_immediate *im;
 539         struct timeval request_time;
 540         struct file_id id;
 541         DATA_BLOB private_data;
 542         uint8_t out_oplock_level;
 543         uint32_t out_create_action;
 544         NTTIME out_creation_time;
 545         NTTIME out_last_access_time;
 546         NTTIME out_last_write_time;
 547         NTTIME out_change_time;
 548         uint64_t out_allocation_size;
 549         uint64_t out_end_of_file;
 550         uint32_t out_file_attributes;
 551         uint64_t out_file_id_persistent;
 552         uint64_t out_file_id_volatile;
 553         struct smb2_create_blobs out_context_blobs;
 554 };
 555
 556 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 557                         struct tevent_context *ev,
 558                         struct smbd_smb2_request *smb2req,
 559                         uint8_t in_oplock_level,
 560                         uint32_t in_impersonation_level,
 561                         uint32_t in_desired_access,
 562                         uint32_t in_file_attributes,
 563                         uint32_t in_share_access,
 564                         uint32_t in_create_disposition,
 565                         uint32_t in_create_options,
 566                         const char *in_name,
 567                         struct smb2_create_blobs in_context_blobs)
 568 {
 569         struct tevent_req *req = NULL;
 570         struct smbd_smb2_create_state *state = NULL;
 571         NTSTATUS status;
 572         struct smb_request *smb1req = NULL;
 573         files_struct *result = NULL;
 574         int info;
 575         struct timespec write_time_ts;
 576         struct smb2_create_blobs out_context_blobs;
 577         int requested_oplock_level;
 578         bool do_durable_reconnect = false;
 579
 580         ZERO_STRUCT(out_context_blobs);
 581
 582         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
 583                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 584         } else {
 585                 requested_oplock_level = in_oplock_level;
 586         }
 587
 588
 589         if (smb2req->subreq == NULL) {
 590                 /* New create call. */
 591                 req = tevent_req_create(mem_ctx, &state,
 592                                 struct smbd_smb2_create_state);
 593                 if (req == NULL) {
 594                         return NULL;
 595                 }
 596                 state->smb2req = smb2req;
 597
 598                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 599                 if (tevent_req_nomem(smb1req, req)) {
 600                         return tevent_req_post(req, ev);
 601                 }
 602                 state->smb1req = smb1req;
 603                 smb2req->subreq = req;
 604                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 605                         in_name));
 606         } else {
 607                 /* Re-entrant create call. */
 608                 req = smb2req->subreq;
 609                 state = tevent_req_data(req,
 610                                 struct smbd_smb2_create_state);
 611                 smb1req = state->smb1req;
 612                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 613                         in_name ));
 614         }
 615
 616         if (IS_IPC(smb1req->conn)) {
 617                 const char *pipe_name = in_name;
 618
 619                 if (!lp_nt_pipe_support()) {
 620                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 621                         return tevent_req_post(req, ev);
 622                 }
 623
 624                 /* Strip \\ off the name. */
 625                 if (pipe_name[0] == '\\') {
 626                         pipe_name++;
 627                 }
 628
 629                 status = open_np_file(smb1req, pipe_name, &result);
 630                 if (!NT_STATUS_IS_OK(status)) {
 631                         tevent_req_nterror(req, status);
 632                         return tevent_req_post(req, ev);
 633                 }
 634                 info = FILE_WAS_OPENED;
 635         } else if (CAN_PRINT(smb1req->conn)) {
 636                 status = file_new(smb1req, smb1req->conn, &result);
 637                 if(!NT_STATUS_IS_OK(status)) {
 638                         tevent_req_nterror(req, status);
 639                         return tevent_req_post(req, ev);
 640                 }
 641
 642                 status = print_spool_open(result, in_name,
 643                                           smb1req->vuid);
 644                 if (!NT_STATUS_IS_OK(status)) {
 645                         file_free(smb1req, result);
 646                         tevent_req_nterror(req, status);
 647                         return tevent_req_post(req, ev);
 648                 }
 649                 info = FILE_WAS_CREATED;
 650         } else {
 651                 char *fname;
 652                 struct smb_filename *smb_fname = NULL;
 653                 struct smb2_create_blob *exta = NULL;
 654                 struct ea_list *ea_list = NULL;
 655                 struct smb2_create_blob *mxac = NULL;
 656                 NTTIME max_access_time = 0;
 657                 struct smb2_create_blob *secd = NULL;
 658                 struct security_descriptor *sec_desc = NULL;
 659                 struct smb2_create_blob *dhnq = NULL;
 660                 struct smb2_create_blob *dhnc = NULL;
 661                 struct smb2_create_blob *alsi = NULL;
 662                 uint64_t allocation_size = 0;
 663                 struct smb2_create_blob *twrp = NULL;
 664                 struct smb2_create_blob *qfid = NULL;
 665
 666                 exta = smb2_create_blob_find(&in_context_blobs,
 667                                              SMB2_CREATE_TAG_EXTA);
 668                 mxac = smb2_create_blob_find(&in_context_blobs,
 669                                              SMB2_CREATE_TAG_MXAC);
 670                 secd = smb2_create_blob_find(&in_context_blobs,
 671                                              SMB2_CREATE_TAG_SECD);
 672                 dhnq = smb2_create_blob_find(&in_context_blobs,
 673                                              SMB2_CREATE_TAG_DHNQ);
 674                 dhnc = smb2_create_blob_find(&in_context_blobs,
 675                                              SMB2_CREATE_TAG_DHNC);
 676                 alsi = smb2_create_blob_find(&in_context_blobs,
 677                                              SMB2_CREATE_TAG_ALSI);
 678                 twrp = smb2_create_blob_find(&in_context_blobs,
 679                                              SMB2_CREATE_TAG_TWRP);
 680                 qfid = smb2_create_blob_find(&in_context_blobs,
 681                                              SMB2_CREATE_TAG_QFID);
 682
 683                 fname = talloc_strdup(state, in_name);
 684                 if (tevent_req_nomem(fname, req)) {
 685                         return tevent_req_post(req, ev);
 686                 }
 687
 688                 if (exta) {
 689                         if (dhnc) {
 690                                 tevent_req_nterror(req,NT_STATUS_OBJECT_NAME_NOT_FOUND);
 691                                 return tevent_req_post(req, ev);
 692                         }
 693
 694                         ea_list = read_nttrans_ea_list(mem_ctx,
 695                                 (const char *)exta->data.data, exta->data.length);
 696                         if (!ea_list) {
 697                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 698                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 699                                 return tevent_req_post(req, ev);
 700                         }
 701                 }
 702
 703                 if (mxac) {
 704                         if (dhnc) {
 705                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 706                                 return tevent_req_post(req, ev);
 707                         }
 708
 709                         if (mxac->data.length == 0) {
 710                                 max_access_time = 0;
 711                         } else if (mxac->data.length == 8) {
 712                                 max_access_time = BVAL(mxac->data.data, 0);
 713                         } else {
 714                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 715                                 return tevent_req_post(req, ev);
 716                         }
 717                 }
 718
 719                 if (secd) {
 720                         enum ndr_err_code ndr_err;
 721
 722                         if (dhnc) {
 723                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 724                                 return tevent_req_post(req, ev);
 725                         }
 726
 727                         sec_desc = talloc_zero(state, struct security_descriptor);
 728                         if (tevent_req_nomem(sec_desc, req)) {
 729                                 return tevent_req_post(req, ev);
 730                         }
 731
 732                         ndr_err = ndr_pull_struct_blob(&secd->data,
 733                                 sec_desc, sec_desc,
 734                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 735                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 736                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 737                                          ndr_errstr(ndr_err)));
 738                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 739                                 return tevent_req_post(req, ev);
 740                         }
 741                 }
 742
 743                 if (dhnq) {
 744                         if (dhnc) {
 745                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 746                                 return tevent_req_post(req, ev);
 747                         }
 748
 749                         if (dhnq->data.length != 16) {
 750                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 751                                 return tevent_req_post(req, ev);
 752                         }
 753                         /*
 754                          * durable handle request is processed below.
 755                          */
 756                 }
 757
 758                 if (dhnc) {
 759                         uint64_t persistent_id;
 760                         struct smbXsrv_open *op = NULL;
 761
 762                         if (dhnc->data.length != 16) {
 763                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 764                                 return tevent_req_post(req, ev);
 765                         }
 766
 767                         persistent_id = BVAL(dhnc->data.data, 0);
 768
 769                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 770                                                        persistent_id,
 771                                                        &op);
 772                         if (!NT_STATUS_IS_OK(status)) {
 773                                 tevent_req_nterror(req, status);
 774                                 return tevent_req_post(req, ev);
 775                         }
 776
 777                         /* TODO: needed? or is successful global_lookup enough?) */
 778
 779                         if (!op->global->durable) {
 780                                 talloc_free(op);
 781                                 tevent_req_nterror(req,
 782                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 783                                 return tevent_req_post(req, ev);
 784                         }
 785
 786                         do_durable_reconnect = true;
 787                 }
 788
 789                 if (alsi) {
 790                         if (dhnc) {
 791                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 792                                 return tevent_req_post(req, ev);
 793                         }
 794
 795                         if (alsi->data.length != 8) {
 796                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 797                                 return tevent_req_post(req, ev);
 798                         }
 799                         allocation_size = BVAL(alsi->data.data, 0);
 800                 }
 801
 802                 if (twrp) {
 803                         NTTIME nttime;
 804                         time_t t;
 805                         struct tm *tm;
 806
 807                         if (dhnc) {
 808                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 809                                 return tevent_req_post(req, ev);
 810                         }
 811
 812                         if (twrp->data.length != 8) {
 813                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 814                                 return tevent_req_post(req, ev);
 815                         }
 816
 817                         nttime = BVAL(twrp->data.data, 0);
 818                         t = nt_time_to_unix(nttime);
 819                         tm = gmtime(&t);
 820
 821                         TALLOC_FREE(fname);
 822                         fname = talloc_asprintf(state,
 823                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 824                                         tm->tm_year + 1900,
 825                                         tm->tm_mon + 1,
 826                                         tm->tm_mday,
 827                                         tm->tm_hour,
 828                                         tm->tm_min,
 829                                         tm->tm_sec,
 830                                         in_name);
 831                         if (tevent_req_nomem(fname, req)) {
 832                                 return tevent_req_post(req, ev);
 833                         }
 834                 }
 835
 836                 if (qfid) {
 837                         if (qfid->data.length != 0) {
 838                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 839                                 return tevent_req_post(req, ev);
 840                         }
 841                 }
 842
 843                 /* these are ignored for SMB2 */
 844                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 845                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 846
 847                 /*
 848                  * For a DFS path the function parse_dfs_path()
 849                  * will do the path processing.
 850                  */
 851
 852                 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 853                         /* convert '\\' into '/' */
 854                         status = check_path_syntax(fname);
 855                         if (!NT_STATUS_IS_OK(status)) {
 856                                 tevent_req_nterror(req, status);
 857                                 return tevent_req_post(req, ev);
 858                         }
 859                 }
 860
 861                 status = filename_convert(req,
 862                                           smb1req->conn,
 863                                           smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 864                                           fname,
 865                                           0,
 866                                           NULL,
 867                                           &smb_fname);
 868                 if (!NT_STATUS_IS_OK(status)) {
 869                         tevent_req_nterror(req, status);
 870                         return tevent_req_post(req, ev);
 871                 }
 872
 873                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 874
 875                 /*
 876                  * For the backend file open procedure, there are
 877                  * two possible modes: durable_reconnect or not.
 878                  */
 879                 if (do_durable_reconnect) {
 880                         status = smb2_create_durable_reconnect(op,
 881                                                                smb1req,
 882                                                                smb_fname,
 883                                                                mem_ctx,
 884                                                                &result);
 885
 886                         if (!NT_STATUS_IS_OK(status)) {
 887                                 tevent_req_nterror(req, status);
 888                                 return tevent_req_post(req, ev);
 889                         }
 890
 891                         // TODO: response construction
 892
 893                         tevent_req_done(req);
 894                         return tevent_req_post(req, ev);
 895                 } else {
 896                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 897                                                      smb1req,
 898                                                      0, /* root_dir_fid */
 899                                                      smb_fname,
 900                                                      in_desired_access,
 901                                                      in_share_access,
 902                                                      in_create_disposition,
 903                                                      in_create_options,
 904                                                      in_file_attributes,
 905                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 906                                                      allocation_size,
 907                                                      0, /* private_flags */
 908                                                      sec_desc,
 909                                                      ea_list,
 910                                                      &result,
 911                                                      &info);
 912                         if (!NT_STATUS_IS_OK(status)) {
 913                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 914                                         return req;
 915                                 }
 916                                 tevent_req_nterror(req, status);
 917                                 return tevent_req_post(req, ev);
 918                         }
 919                 }
 920
 921                 if (mxac) {
 922                         NTTIME last_write_time;
 923
 924                         unix_timespec_to_nt_time(&last_write_time,
 925                                                  result->fsp_name->st.st_ex_mtime);
 926                         if (last_write_time != max_access_time) {
 927                                 uint8_t p[8];
 928                                 uint32_t max_access_granted;
 929                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 930
 931                                 status = smbd_calculate_access_mask(smb1req->conn,
 932                                                         result->fsp_name,
 933                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 934                                                         &max_access_granted);
 935
 936                                 SIVAL(p, 0, NT_STATUS_V(status));
 937                                 SIVAL(p, 4, max_access_granted);
 938
 939                                 status = smb2_create_blob_add(state,
 940                                                         &out_context_blobs,
 941                                                         SMB2_CREATE_TAG_MXAC,
 942                                                         blob);
 943                                 if (!NT_STATUS_IS_OK(status)) {
 944                                         tevent_req_nterror(req, status);
 945                                         return tevent_req_post(req, ev);
 946                                 }
 947                         }
 948                 }
 949
 950                 if (dhnq && BATCH_OPLOCK_TYPE(result->oplock_type)) {
 951                         uint8_t p[8];
 952                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 953
 954                         result->smbXsrv->global->backend_file_id = result->file_id;
 955                         result->smbXsrv->global->durable = true;
 956
 957                         status = smbXsrv_open_update(result->smbXsrv);
 958                         if (!NT_STATUS_IS_OK(status)) {
 959                                 tevent_req_nterror(req, status);
 960                                 return tevent_req_post(req, ev);
 961                         }
 962
 963                         ZERO_STRUCT(p);
 964
 965                         status = smb2_create_blob_add(state, &out_context_blobs,
 966                                                       SMB2_CREATE_TAG_DHNQ,
 967                                                       blob);
 968                         if (!NT_STATUS_IS_OK(status)) {
 969                                 tevent_req_nterror(req, status);
 970                                 return tevent_req_post(req, ev);
 971                         }
 972                 }
 973
 974                 if (qfid) {
 975                         uint8_t p[32];
 976                         uint64_t file_index = get_FileIndex(result->conn,
 977                                                         &result->fsp_name->st);
 978                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 979
 980                         ZERO_STRUCT(p);
 981
 982                         /* From conversations with Microsoft engineers at
 983                            the MS plugfest. The first 8 bytes are the "volume index"
 984                            == inode, the second 8 bytes are the "volume id",
 985                            == dev. This will be updated in the SMB2 doc. */
 986                         SBVAL(p, 0, file_index);
 987                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
 988
 989                         status = smb2_create_blob_add(state, &out_context_blobs,
 990                                                       SMB2_CREATE_TAG_QFID,
 991                                                       blob);
 992                         if (!NT_STATUS_IS_OK(status)) {
 993                                 tevent_req_nterror(req, status);
 994                                 return tevent_req_post(req, ev);
 995                         }
 996                 }
 997         }
 998
 999         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1000
1001         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
1002                 state->out_oplock_level = in_oplock_level;
1003         } else {
1004                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1005         }
1006
1007         if ((in_create_disposition == FILE_SUPERSEDE)
1008             && (info == FILE_WAS_OVERWRITTEN)) {
1009                 state->out_create_action = FILE_WAS_SUPERSEDED;
1010         } else {
1011                 state->out_create_action = info;
1012         }
1013         state->out_file_attributes = dos_mode(result->conn,
1014                                            result->fsp_name);
1015         /* Deal with other possible opens having a modified
1016            write time. JRA. */
1017         ZERO_STRUCT(write_time_ts);
1018         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1019         if (!null_timespec(write_time_ts)) {
1020                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1021         }
1022
1023         unix_timespec_to_nt_time(&state->out_creation_time,
1024                         get_create_timespec(smb1req->conn, result,
1025                                         result->fsp_name));
1026         unix_timespec_to_nt_time(&state->out_last_access_time,
1027                         result->fsp_name->st.st_ex_atime);
1028         unix_timespec_to_nt_time(&state->out_last_write_time,
1029                         result->fsp_name->st.st_ex_mtime);
1030         unix_timespec_to_nt_time(&state->out_change_time,
1031                         get_change_timespec(smb1req->conn, result,
1032                                         result->fsp_name));
1033         state->out_allocation_size =
1034                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1035                                                &(result->fsp_name->st));
1036         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1037         if (state->out_file_attributes == 0) {
1038                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1039         }
1040
1041         state->out_file_id_persistent = result->smbXsrv->global->open_persistent_id;
1042         state->out_file_id_volatile = result->smbXsrv->global->open_volatile_id;
1043         state->out_context_blobs = out_context_blobs;
1044
1045         tevent_req_done(req);
1046         return tevent_req_post(req, ev);
1047 }
1048
1049 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1050                         TALLOC_CTX *mem_ctx,
1051                         uint8_t *out_oplock_level,
1052                         uint32_t *out_create_action,
1053                         NTTIME *out_creation_time,
1054                         NTTIME *out_last_access_time,
1055                         NTTIME *out_last_write_time,
1056                         NTTIME *out_change_time,
1057                         uint64_t *out_allocation_size,
1058                         uint64_t *out_end_of_file,
1059                         uint32_t *out_file_attributes,
1060                         uint64_t *out_file_id_persistent,
1061                         uint64_t *out_file_id_volatile,
1062                         struct smb2_create_blobs *out_context_blobs)
1063 {
1064         NTSTATUS status;
1065         struct smbd_smb2_create_state *state = tevent_req_data(req,
1066                                                struct smbd_smb2_create_state);
1067
1068         if (tevent_req_is_nterror(req, &status)) {
1069                 tevent_req_received(req);
1070                 return status;
1071         }
1072
1073         *out_oplock_level       = state->out_oplock_level;
1074         *out_create_action      = state->out_create_action;
1075         *out_creation_time      = state->out_creation_time;
1076         *out_last_access_time   = state->out_last_access_time;
1077         *out_last_write_time    = state->out_last_write_time;
1078         *out_change_time        = state->out_change_time;
1079         *out_allocation_size    = state->out_allocation_size;
1080         *out_end_of_file        = state->out_end_of_file;
1081         *out_file_attributes    = state->out_file_attributes;
1082         *out_file_id_persistent = state->out_file_id_persistent;
1083         *out_file_id_volatile   = state->out_file_id_volatile;
1084         *out_context_blobs      = state->out_context_blobs;
1085
1086         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1087
1088         tevent_req_received(req);
1089         return NT_STATUS_OK;
1090 }
1091
1092 /*********************************************************
1093  Code for dealing with deferred opens.
1094 *********************************************************/
1095
1096 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1097                         struct timeval *p_request_time,
1098                         void **pp_state)
1099 {
1100         struct smbd_smb2_create_state *state = NULL;
1101         struct tevent_req *req = NULL;
1102
1103         if (!smb2req) {
1104                 return false;
1105         }
1106         if (smb2req->async_te == NULL) {
1107                 return false;
1108         }
1109         req = smb2req->subreq;
1110         if (!req) {
1111                 return false;
1112         }
1113         state = tevent_req_data(req, struct smbd_smb2_create_state);
1114         if (!state) {
1115                 return false;
1116         }
1117         if (p_request_time) {
1118                 *p_request_time = state->request_time;
1119         }
1120         if (pp_state) {
1121                 *pp_state = (void *)state->private_data.data;
1122         }
1123         return true;
1124 }
1125
1126 /*********************************************************
1127  Re-process this call early - requested by message or
1128  close.
1129 *********************************************************/
1130
1131 static struct smbd_smb2_request *find_open_smb2req(
1132         struct smbd_server_connection *sconn, uint64_t mid)
1133 {
1134         struct smbd_smb2_request *smb2req;
1135
1136         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1137                 uint64_t message_id;
1138                 if (smb2req->subreq == NULL) {
1139                         /* This message has been processed. */
1140                         continue;
1141                 }
1142                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1143                         /* This message has been processed. */
1144                         continue;
1145                 }
1146                 message_id = get_mid_from_smb2req(smb2req);
1147                 if (message_id == mid) {
1148                         return smb2req;
1149                 }
1150         }
1151         return NULL;
1152 }
1153
1154 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1155 {
1156         struct smbd_smb2_create_state *state = NULL;
1157         struct smbd_smb2_request *smb2req;
1158
1159         smb2req = find_open_smb2req(sconn, mid);
1160
1161         if (!smb2req) {
1162                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1163                         (unsigned long long)mid));
1164                 return false;
1165         }
1166         if (!smb2req->subreq) {
1167                 return false;
1168         }
1169         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1170                 return false;
1171         }
1172         state = tevent_req_data(smb2req->subreq,
1173                         struct smbd_smb2_create_state);
1174         if (!state) {
1175                 return false;
1176         }
1177         /* It's not in progress if there's no timeout event. */
1178         if (!state->te) {
1179                 return false;
1180         }
1181
1182         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1183                         (unsigned long long)mid));
1184
1185         return true;
1186 }
1187
1188 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1189                                                         uint64_t mid)
1190 {
1191         struct smbd_smb2_create_state *state = NULL;
1192
1193         if (!smb2req->subreq) {
1194                 return;
1195         }
1196         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1197                 return;
1198         }
1199         state = tevent_req_data(smb2req->subreq,
1200                         struct smbd_smb2_create_state);
1201         if (!state) {
1202                 return;
1203         }
1204
1205         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1206                 "mid %llu\n",
1207                 (unsigned long long)mid ));
1208
1209         /* Ensure we don't have any outstanding timer event. */
1210         TALLOC_FREE(state->te);
1211         /* Ensure we don't have any outstanding immediate event. */
1212         TALLOC_FREE(state->im);
1213 }
1214
1215 void remove_deferred_open_message_smb2(
1216         struct smbd_server_connection *sconn, uint64_t mid)
1217 {
1218         struct smbd_smb2_request *smb2req;
1219
1220         smb2req = find_open_smb2req(sconn, mid);
1221
1222         if (!smb2req) {
1223                 DEBUG(10,("remove_deferred_open_message_smb2: "
1224                         "can't find mid %llu\n",
1225                         (unsigned long long)mid ));
1226                 return;
1227         }
1228         remove_deferred_open_message_smb2_internal(smb2req, mid);
1229 }
1230
1231 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1232                                         struct tevent_immediate *im,
1233                                         void *private_data)
1234 {
1235         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1236                                         struct smbd_smb2_request);
1237         struct smbd_server_connection *sconn = smb2req->sconn;
1238         uint64_t mid = get_mid_from_smb2req(smb2req);
1239         NTSTATUS status;
1240
1241         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1242                 "re-dispatching mid %llu\n",
1243                 (unsigned long long)mid ));
1244
1245         status = smbd_smb2_request_dispatch(smb2req);
1246         if (!NT_STATUS_IS_OK(status)) {
1247                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1248                 return;
1249         }
1250 }
1251
1252 void schedule_deferred_open_message_smb2(
1253         struct smbd_server_connection *sconn, uint64_t mid)
1254 {
1255         struct smbd_smb2_create_state *state = NULL;
1256         struct smbd_smb2_request *smb2req;
1257
1258         smb2req = find_open_smb2req(sconn, mid);
1259
1260         if (!smb2req) {
1261                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1262                         "can't find mid %llu\n",
1263                         (unsigned long long)mid ));
1264                 return;
1265         }
1266         if (!smb2req->subreq) {
1267                 return;
1268         }
1269         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1270                 return;
1271         }
1272         state = tevent_req_data(smb2req->subreq,
1273                         struct smbd_smb2_create_state);
1274         if (!state) {
1275                 return;
1276         }
1277
1278         /* Ensure we don't have any outstanding timer event. */
1279         TALLOC_FREE(state->te);
1280         /* Ensure we don't have any outstanding immediate event. */
1281         TALLOC_FREE(state->im);
1282
1283         /*
1284          * This is subtle. We must null out the callback
1285          * before resheduling, else the first call to
1286          * tevent_req_nterror() causes the _receive()
1287          * function to be called, this causing tevent_req_post()
1288          * to crash.
1289          */
1290         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1291
1292         state->im = tevent_create_immediate(smb2req);
1293         if (!state->im) {
1294                 smbd_server_connection_terminate(smb2req->sconn,
1295                         nt_errstr(NT_STATUS_NO_MEMORY));
1296                 return;
1297         }
1298
1299         DEBUG(10,("schedule_deferred_open_message_smb2: "
1300                 "re-processing mid %llu\n",
1301                 (unsigned long long)mid ));
1302
1303         tevent_schedule_immediate(state->im,
1304                         smb2req->sconn->ev_ctx,
1305                         smbd_smb2_create_request_dispatch_immediate,
1306                         smb2req);
1307 }
1308
1309 /*********************************************************
1310  Re-process this call.
1311 *********************************************************/
1312
1313 static void smb2_deferred_open_timer(struct event_context *ev,
1314                                         struct timed_event *te,
1315                                         struct timeval _tval,
1316                                         void *private_data)
1317 {
1318         NTSTATUS status;
1319         struct smbd_smb2_create_state *state = NULL;
1320         struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1321                                                 struct smbd_smb2_request);
1322
1323         DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1324                 smb2req->current_idx,
1325                 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1326
1327         state = tevent_req_data(smb2req->subreq,
1328                         struct smbd_smb2_create_state);
1329         if (!state) {
1330                 return;
1331         }
1332         /*
1333          * Null this out, don't talloc_free. It will
1334          * be talloc_free'd by the tevent library when
1335          * this returns.
1336          */
1337         state->te = NULL;
1338         /* Ensure we don't have any outstanding immediate event. */
1339         TALLOC_FREE(state->im);
1340
1341         /*
1342          * This is subtle. We must null out the callback
1343          * before resheduling, else the first call to
1344          * tevent_req_nterror() causes the _receive()
1345          * function to be called, this causing tevent_req_post()
1346          * to crash.
1347          */
1348         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1349
1350         status = smbd_smb2_request_dispatch(smb2req);
1351
1352         if (!NT_STATUS_IS_OK(status)) {
1353                 smbd_server_connection_terminate(smb2req->sconn,
1354                                 nt_errstr(status));
1355         }
1356 }
1357
1358 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1359 {
1360         struct smbd_smb2_request *smb2req = NULL;
1361         struct smbd_smb2_create_state *state = tevent_req_data(req,
1362                                 struct smbd_smb2_create_state);
1363         uint64_t mid;
1364
1365         if (!state) {
1366                 return false;
1367         }
1368
1369         if (!state->smb2req) {
1370                 return false;
1371         }
1372
1373         smb2req = state->smb2req;
1374         mid = get_mid_from_smb2req(smb2req);
1375
1376         remove_deferred_open_entry(state->id, mid,
1377                                    messaging_server_id(smb2req->sconn->msg_ctx));
1378         remove_deferred_open_message_smb2_internal(smb2req, mid);
1379         smb2req->cancelled = true;
1380
1381         tevent_req_done(req);
1382         return true;
1383 }
1384
1385 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1386                                 struct timeval request_time,
1387                                 struct timeval timeout,
1388                                 struct file_id id,
1389                                 char *private_data,
1390                                 size_t priv_len)
1391 {
1392         struct tevent_req *req = NULL;
1393         struct smbd_smb2_create_state *state = NULL;
1394         struct timeval end_time;
1395
1396         if (!smb2req) {
1397                 return false;
1398         }
1399         req = smb2req->subreq;
1400         if (!req) {
1401                 return false;
1402         }
1403         state = tevent_req_data(req, struct smbd_smb2_create_state);
1404         if (!state) {
1405                 return false;
1406         }
1407         state->id = id;
1408         state->request_time = request_time;
1409         state->private_data = data_blob_talloc(state, private_data,
1410                                                 priv_len);
1411         if (!state->private_data.data) {
1412                 return false;
1413         }
1414
1415         /* Re-schedule us to retry on timer expiry. */
1416         end_time = timeval_sum(&request_time, &timeout);
1417
1418         DEBUG(10,("push_deferred_open_message_smb2: "
1419                 "timeout at %s\n",
1420                 timeval_string(talloc_tos(),
1421                                 &end_time,
1422                                 true) ));
1423
1424         state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1425                                 state,
1426                                 end_time,
1427                                 smb2_deferred_open_timer,
1428                                 smb2req);
1429         if (!state->te) {
1430                 return false;
1431         }
1432
1433         /* allow this request to be canceled */
1434         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1435
1436         return true;
1437 }