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                 return SMB2_OPLOCK_LEVEL_II;
  62         } else {
  63                 return SMB2_OPLOCK_LEVEL_NONE;
  64         }
  65 }
  66
  67 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  68                         struct tevent_context *ev,
  69                         struct smbd_smb2_request *smb2req,
  70                         uint8_t in_oplock_level,
  71                         uint32_t in_impersonation_level,
  72                         uint32_t in_desired_access,
  73                         uint32_t in_file_attributes,
  74                         uint32_t in_share_access,
  75                         uint32_t in_create_disposition,
  76                         uint32_t in_create_options,
  77                         const char *in_name,
  78                         struct smb2_create_blobs in_context_blobs);
  79 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  80                         TALLOC_CTX *mem_ctx,
  81                         uint8_t *out_oplock_level,
  82                         uint32_t *out_create_action,
  83                         NTTIME *out_creation_time,
  84                         NTTIME *out_last_access_time,
  85                         NTTIME *out_last_write_time,
  86                         NTTIME *out_change_time,
  87                         uint64_t *out_allocation_size,
  88                         uint64_t *out_end_of_file,
  89                         uint32_t *out_file_attributes,
  90                         uint64_t *out_file_id_persistent,
  91                         uint64_t *out_file_id_volatile,
  92                         struct smb2_create_blobs *out_context_blobs);
  93
  94 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
  95 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
  96 {
  97         const uint8_t *inbody;
  98         const struct iovec *indyniov;
  99         uint8_t in_oplock_level;
 100         uint32_t in_impersonation_level;
 101         uint32_t in_desired_access;
 102         uint32_t in_file_attributes;
 103         uint32_t in_share_access;
 104         uint32_t in_create_disposition;
 105         uint32_t in_create_options;
 106         uint16_t in_name_offset;
 107         uint16_t in_name_length;
 108         DATA_BLOB in_name_buffer;
 109         char *in_name_string;
 110         size_t in_name_string_size;
 111         uint32_t name_offset = 0;
 112         uint32_t name_available_length = 0;
 113         uint32_t in_context_offset;
 114         uint32_t in_context_length;
 115         DATA_BLOB in_context_buffer;
 116         struct smb2_create_blobs in_context_blobs;
 117         uint32_t context_offset = 0;
 118         uint32_t context_available_length = 0;
 119         uint32_t dyn_offset;
 120         NTSTATUS status;
 121         bool ok;
 122         struct tevent_req *tsubreq;
 123
 124         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 return smbd_smb2_request_error(smb2req, status);
 127         }
 128         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 129
 130         in_oplock_level         = CVAL(inbody, 0x03);
 131         in_impersonation_level  = IVAL(inbody, 0x04);
 132         in_desired_access       = IVAL(inbody, 0x18);
 133         in_file_attributes      = IVAL(inbody, 0x1C);
 134         in_share_access         = IVAL(inbody, 0x20);
 135         in_create_disposition   = IVAL(inbody, 0x24);
 136         in_create_options       = IVAL(inbody, 0x28);
 137         in_name_offset          = SVAL(inbody, 0x2C);
 138         in_name_length          = SVAL(inbody, 0x2E);
 139         in_context_offset       = IVAL(inbody, 0x30);
 140         in_context_length       = IVAL(inbody, 0x34);
 141
 142         /*
 143          * First check if the dynamic name and context buffers
 144          * are correctly specified.
 145          *
 146          * Note: That we don't check if the name and context buffers
 147          *       overlap
 148          */
 149
 150         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 151
 152         if (in_name_offset == 0 && in_name_length == 0) {
 153                 /* This is ok */
 154                 name_offset = 0;
 155         } else if (in_name_offset < dyn_offset) {
 156                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 157         } else {
 158                 name_offset = in_name_offset - dyn_offset;
 159         }
 160
 161         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 162
 163         if (name_offset > indyniov->iov_len) {
 164                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 165         }
 166
 167         name_available_length = indyniov->iov_len - name_offset;
 168
 169         if (in_name_length > name_available_length) {
 170                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 171         }
 172
 173         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 174         in_name_buffer.length = in_name_length;
 175
 176         if (in_context_offset == 0 && in_context_length == 0) {
 177                 /* This is ok */
 178                 context_offset = 0;
 179         } else if (in_context_offset < dyn_offset) {
 180                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 181         } else {
 182                 context_offset = in_context_offset - dyn_offset;
 183         }
 184
 185         if (context_offset > indyniov->iov_len) {
 186                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 187         }
 188
 189         context_available_length = indyniov->iov_len - context_offset;
 190
 191         if (in_context_length > context_available_length) {
 192                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 193         }
 194
 195         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 196                 context_offset;
 197         in_context_buffer.length = in_context_length;
 198
 199         /*
 200          * Now interpret the name and context buffers
 201          */
 202
 203         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 204                                    in_name_buffer.data,
 205                                    in_name_buffer.length,
 206                                    &in_name_string,
 207                                    &in_name_string_size);
 208         if (!ok) {
 209                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 210         }
 211
 212         if (in_name_buffer.length == 0) {
 213                 in_name_string_size = 0;
 214         }
 215
 216         if (strlen(in_name_string) != in_name_string_size) {
 217                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 218         }
 219
 220         ZERO_STRUCT(in_context_blobs);
 221         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 222         if (!NT_STATUS_IS_OK(status)) {
 223                 return smbd_smb2_request_error(smb2req, status);
 224         }
 225
 226         tsubreq = smbd_smb2_create_send(smb2req,
 227                                        smb2req->sconn->ev_ctx,
 228                                        smb2req,
 229                                        in_oplock_level,
 230                                        in_impersonation_level,
 231                                        in_desired_access,
 232                                        in_file_attributes,
 233                                        in_share_access,
 234                                        in_create_disposition,
 235                                        in_create_options,
 236                                        in_name_string,
 237                                        in_context_blobs);
 238         if (tsubreq == NULL) {
 239                 smb2req->subreq = NULL;
 240                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 241         }
 242         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 243
 244         /*
 245          * For now we keep the logic that we do not send STATUS_PENDING
 246          * for sharing violations, so we just wait 2 seconds.
 247          *
 248          * TODO: we need more tests for this.
 249          */
 250         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 251 }
 252
 253 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 254 {
 255         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 256         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 257 }
 258
 259 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 260 {
 261         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 262                                         struct smbd_smb2_request);
 263         DATA_BLOB outbody;
 264         DATA_BLOB outdyn;
 265         uint8_t out_oplock_level = 0;
 266         uint32_t out_create_action = 0;
 267         NTTIME out_creation_time = 0;
 268         NTTIME out_last_access_time = 0;
 269         NTTIME out_last_write_time = 0;
 270         NTTIME out_change_time = 0;
 271         uint64_t out_allocation_size = 0;
 272         uint64_t out_end_of_file = 0;
 273         uint32_t out_file_attributes = 0;
 274         uint64_t out_file_id_persistent = 0;
 275         uint64_t out_file_id_volatile = 0;
 276         struct smb2_create_blobs out_context_blobs;
 277         DATA_BLOB out_context_buffer;
 278         uint16_t out_context_buffer_offset = 0;
 279         NTSTATUS status;
 280         NTSTATUS error; /* transport error */
 281
 282         status = smbd_smb2_create_recv(tsubreq,
 283                                        smb2req,
 284                                        &out_oplock_level,
 285                                        &out_create_action,
 286                                        &out_creation_time,
 287                                        &out_last_access_time,
 288                                        &out_last_write_time,
 289                                        &out_change_time,
 290                                        &out_allocation_size,
 291                                        &out_end_of_file,
 292                                        &out_file_attributes,
 293                                        &out_file_id_persistent,
 294                                        &out_file_id_volatile,
 295                                        &out_context_blobs);
 296         if (!NT_STATUS_IS_OK(status)) {
 297                 error = smbd_smb2_request_error(smb2req, status);
 298                 if (!NT_STATUS_IS_OK(error)) {
 299                         smbd_server_connection_terminate(smb2req->sconn,
 300                                                          nt_errstr(error));
 301                         return;
 302                 }
 303                 return;
 304         }
 305
 306         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 307         if (!NT_STATUS_IS_OK(status)) {
 308                 error = smbd_smb2_request_error(smb2req, status);
 309                 if (!NT_STATUS_IS_OK(error)) {
 310                         smbd_server_connection_terminate(smb2req->sconn,
 311                                                          nt_errstr(error));
 312                         return;
 313                 }
 314                 return;
 315         }
 316
 317         if (out_context_buffer.length > 0) {
 318                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 319         }
 320
 321         outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
 322         if (outbody.data == NULL) {
 323                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 324                 if (!NT_STATUS_IS_OK(error)) {
 325                         smbd_server_connection_terminate(smb2req->sconn,
 326                                                          nt_errstr(error));
 327                         return;
 328                 }
 329                 return;
 330         }
 331
 332         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 333         SCVAL(outbody.data, 0x02,
 334               out_oplock_level);                /* oplock level */
 335         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 336         SIVAL(outbody.data, 0x04,
 337               out_create_action);               /* create action */
 338         SBVAL(outbody.data, 0x08,
 339               out_creation_time);               /* creation time */
 340         SBVAL(outbody.data, 0x10,
 341               out_last_access_time);            /* last access time */
 342         SBVAL(outbody.data, 0x18,
 343               out_last_write_time);             /* last write time */
 344         SBVAL(outbody.data, 0x20,
 345               out_change_time);                 /* change time */
 346         SBVAL(outbody.data, 0x28,
 347               out_allocation_size);             /* allocation size */
 348         SBVAL(outbody.data, 0x30,
 349               out_end_of_file);                 /* end of file */
 350         SIVAL(outbody.data, 0x38,
 351               out_file_attributes);             /* file attributes */
 352         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 353         SBVAL(outbody.data, 0x40,
 354               out_file_id_persistent);          /* file id (persistent) */
 355         SBVAL(outbody.data, 0x48,
 356               out_file_id_volatile);            /* file id (volatile) */
 357         SIVAL(outbody.data, 0x50,
 358               out_context_buffer_offset);       /* create contexts offset */
 359         SIVAL(outbody.data, 0x54,
 360               out_context_buffer.length);       /* create contexts length */
 361
 362         outdyn = out_context_buffer;
 363
 364         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 365         if (!NT_STATUS_IS_OK(error)) {
 366                 smbd_server_connection_terminate(smb2req->sconn,
 367                                                  nt_errstr(error));
 368                 return;
 369         }
 370 }
 371
 372 struct smbd_smb2_create_state {
 373         struct smbd_smb2_request *smb2req;
 374         struct smb_request *smb1req;
 375         bool open_was_deferred;
 376         struct tevent_timer *te;
 377         struct tevent_immediate *im;
 378         struct timeval request_time;
 379         struct file_id id;
 380         DATA_BLOB private_data;
 381         uint8_t out_oplock_level;
 382         uint32_t out_create_action;
 383         NTTIME out_creation_time;
 384         NTTIME out_last_access_time;
 385         NTTIME out_last_write_time;
 386         NTTIME out_change_time;
 387         uint64_t out_allocation_size;
 388         uint64_t out_end_of_file;
 389         uint32_t out_file_attributes;
 390         uint64_t out_file_id_persistent;
 391         uint64_t out_file_id_volatile;
 392         struct smb2_create_blobs out_context_blobs;
 393 };
 394
 395 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 396                         struct tevent_context *ev,
 397                         struct smbd_smb2_request *smb2req,
 398                         uint8_t in_oplock_level,
 399                         uint32_t in_impersonation_level,
 400                         uint32_t in_desired_access,
 401                         uint32_t in_file_attributes,
 402                         uint32_t in_share_access,
 403                         uint32_t in_create_disposition,
 404                         uint32_t in_create_options,
 405                         const char *in_name,
 406                         struct smb2_create_blobs in_context_blobs)
 407 {
 408         struct tevent_req *req = NULL;
 409         struct smbd_smb2_create_state *state = NULL;
 410         NTSTATUS status;
 411         struct smb_request *smb1req = NULL;
 412         files_struct *result = NULL;
 413         int info;
 414         struct smb2_create_blobs out_context_blobs;
 415         int requested_oplock_level;
 416         struct smb2_create_blob *dhnc = NULL;
 417         struct smb2_create_blob *dh2c = NULL;
 418         struct smb2_create_blob *dhnq = NULL;
 419         struct smb2_create_blob *dh2q = NULL;
 420         struct smbXsrv_open *op = NULL;
 421
 422         ZERO_STRUCT(out_context_blobs);
 423
 424         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 425                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 426         } else {
 427                 requested_oplock_level = in_oplock_level;
 428         }
 429
 430
 431         if (smb2req->subreq == NULL) {
 432                 /* New create call. */
 433                 req = tevent_req_create(mem_ctx, &state,
 434                                 struct smbd_smb2_create_state);
 435                 if (req == NULL) {
 436                         return NULL;
 437                 }
 438                 state->smb2req = smb2req;
 439
 440                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 441                 if (tevent_req_nomem(smb1req, req)) {
 442                         return tevent_req_post(req, ev);
 443                 }
 444                 state->smb1req = smb1req;
 445                 smb2req->subreq = req;
 446                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 447                         in_name));
 448         } else {
 449                 /* Re-entrant create call. */
 450                 req = smb2req->subreq;
 451                 state = tevent_req_data(req,
 452                                 struct smbd_smb2_create_state);
 453                 smb1req = state->smb1req;
 454                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 455                         in_name ));
 456         }
 457
 458         dhnq = smb2_create_blob_find(&in_context_blobs,
 459                                      SMB2_CREATE_TAG_DHNQ);
 460         dhnc = smb2_create_blob_find(&in_context_blobs,
 461                                      SMB2_CREATE_TAG_DHNC);
 462         dh2q = smb2_create_blob_find(&in_context_blobs,
 463                                      SMB2_CREATE_TAG_DH2Q);
 464         dh2c = smb2_create_blob_find(&in_context_blobs,
 465                                      SMB2_CREATE_TAG_DH2C);
 466
 467         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 468             (dh2q && dh2c))
 469         {
 470                 /* not both are allowed at the same time */
 471                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 472                 return tevent_req_post(req, ev);
 473         }
 474
 475         if (dhnc) {
 476                 uint32_t num_blobs_allowed;
 477
 478                 if (dhnc->data.length != 16) {
 479                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 480                         return tevent_req_post(req, ev);
 481                 }
 482
 483                 /*
 484                  * According to MS-SMB2: 3.3.5.9.7, "Handling the
 485                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
 486                  * we should ignore an additional dhnq blob, but fail
 487                  * the request (with status OBJECT_NAME_NOT_FOUND) if
 488                  * any other extra create blob has been provided.
 489                  *
 490                  * (Note that the cases of an additional dh2q or dh2c blob
 491                  *  which require a different error code, have been treated
 492                  *  above.)
 493                  *
 494                  * TODO:
 495                  * This is only true for the oplock case:
 496                  * For leases, lease request is required additionally.
 497                  */
 498
 499                 if (dhnq) {
 500                         num_blobs_allowed = 2;
 501                 } else {
 502                         num_blobs_allowed = 1;
 503                 }
 504
 505                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 506                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 507                         return tevent_req_post(req, ev);
 508                 }
 509         }
 510
 511         if (dh2c) {
 512                 uint32_t num_blobs_allowed;
 513
 514                 if (dh2c->data.length != 36) {
 515                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 516                         return tevent_req_post(req, ev);
 517                 }
 518
 519                 /*
 520                  * According to MS-SMB2: 3.3.5.9.12, "Handling the
 521                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
 522                  * we should fail the request with status
 523                  * OBJECT_NAME_NOT_FOUND if any other create blob has been
 524                  * provided.
 525                  *
 526                  * (Note that the cases of an additional dhnq, dhnc or dh2q
 527                  *  blob which require a different error code, have been
 528                  *  treated above.)
 529                  *
 530                  * TODO:
 531                  * This is only true for the oplock case:
 532                  * For leases, lease request is required additionally!
 533                  */
 534
 535                 num_blobs_allowed = 1;
 536
 537                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 538                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 539                         return tevent_req_post(req, ev);
 540                 }
 541         }
 542
 543         if (IS_IPC(smb1req->conn)) {
 544                 const char *pipe_name = in_name;
 545
 546                 if (dhnc || dh2c) {
 547                         /* durable handles are not supported on IPC$ */
 548                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 549                         return tevent_req_post(req, ev);
 550                 }
 551
 552                 if (!lp_nt_pipe_support()) {
 553                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 554                         return tevent_req_post(req, ev);
 555                 }
 556
 557                 status = open_np_file(smb1req, pipe_name, &result);
 558                 if (!NT_STATUS_IS_OK(status)) {
 559                         tevent_req_nterror(req, status);
 560                         return tevent_req_post(req, ev);
 561                 }
 562                 info = FILE_WAS_OPENED;
 563         } else if (CAN_PRINT(smb1req->conn)) {
 564                 if (dhnc || dh2c) {
 565                         /* durable handles are not supported on printers */
 566                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 567                         return tevent_req_post(req, ev);
 568                 }
 569
 570                 status = file_new(smb1req, smb1req->conn, &result);
 571                 if(!NT_STATUS_IS_OK(status)) {
 572                         tevent_req_nterror(req, status);
 573                         return tevent_req_post(req, ev);
 574                 }
 575
 576                 status = print_spool_open(result, in_name,
 577                                           smb1req->vuid);
 578                 if (!NT_STATUS_IS_OK(status)) {
 579                         file_free(smb1req, result);
 580                         tevent_req_nterror(req, status);
 581                         return tevent_req_post(req, ev);
 582                 }
 583                 info = FILE_WAS_CREATED;
 584         } else {
 585                 char *fname;
 586                 struct smb2_create_blob *exta = NULL;
 587                 struct ea_list *ea_list = NULL;
 588                 struct smb2_create_blob *mxac = NULL;
 589                 NTTIME max_access_time = 0;
 590                 struct smb2_create_blob *secd = NULL;
 591                 struct security_descriptor *sec_desc = NULL;
 592                 struct smb2_create_blob *alsi = NULL;
 593                 uint64_t allocation_size = 0;
 594                 struct smb2_create_blob *twrp = NULL;
 595                 struct smb2_create_blob *qfid = NULL;
 596                 struct GUID _create_guid = GUID_zero();
 597                 struct GUID *create_guid = NULL;
 598                 bool update_open = false;
 599                 bool durable_requested = false;
 600                 uint32_t durable_timeout_msec = 0;
 601                 bool do_durable_reconnect = false;
 602                 uint64_t persistent_id = 0;
 603
 604                 exta = smb2_create_blob_find(&in_context_blobs,
 605                                              SMB2_CREATE_TAG_EXTA);
 606                 mxac = smb2_create_blob_find(&in_context_blobs,
 607                                              SMB2_CREATE_TAG_MXAC);
 608                 secd = smb2_create_blob_find(&in_context_blobs,
 609                                              SMB2_CREATE_TAG_SECD);
 610                 alsi = smb2_create_blob_find(&in_context_blobs,
 611                                              SMB2_CREATE_TAG_ALSI);
 612                 twrp = smb2_create_blob_find(&in_context_blobs,
 613                                              SMB2_CREATE_TAG_TWRP);
 614                 qfid = smb2_create_blob_find(&in_context_blobs,
 615                                              SMB2_CREATE_TAG_QFID);
 616
 617                 fname = talloc_strdup(state, in_name);
 618                 if (tevent_req_nomem(fname, req)) {
 619                         return tevent_req_post(req, ev);
 620                 }
 621
 622                 if (exta) {
 623                         ea_list = read_nttrans_ea_list(mem_ctx,
 624                                 (const char *)exta->data.data, exta->data.length);
 625                         if (!ea_list) {
 626                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 627                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 628                                 return tevent_req_post(req, ev);
 629                         }
 630
 631                         if (ea_list_has_invalid_name(ea_list)) {
 632                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 633                                 return tevent_req_post(req, ev);
 634                         }
 635                 }
 636
 637                 if (mxac) {
 638                         if (mxac->data.length == 0) {
 639                                 max_access_time = 0;
 640                         } else if (mxac->data.length == 8) {
 641                                 max_access_time = BVAL(mxac->data.data, 0);
 642                         } else {
 643                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 644                                 return tevent_req_post(req, ev);
 645                         }
 646                 }
 647
 648                 if (secd) {
 649                         enum ndr_err_code ndr_err;
 650
 651                         sec_desc = talloc_zero(state, struct security_descriptor);
 652                         if (tevent_req_nomem(sec_desc, req)) {
 653                                 return tevent_req_post(req, ev);
 654                         }
 655
 656                         ndr_err = ndr_pull_struct_blob(&secd->data,
 657                                 sec_desc, sec_desc,
 658                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 659                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 660                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 661                                          ndr_errstr(ndr_err)));
 662                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 663                                 return tevent_req_post(req, ev);
 664                         }
 665                 }
 666
 667                 if (dhnq) {
 668                         if (dhnq->data.length != 16) {
 669                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 670                                 return tevent_req_post(req, ev);
 671                         }
 672
 673                         if (dh2q) {
 674                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 675                                 return tevent_req_post(req, ev);
 676                         }
 677
 678                         /*
 679                          * durable handle request is processed below.
 680                          */
 681                         durable_requested = true;
 682                         /*
 683                          * Set the timeout to 16 mins.
 684                          *
 685                          * TODO: test this against Windows 2012
 686                          *       as the default for durable v2 is 1 min.
 687                          */
 688                         durable_timeout_msec = (16*60*1000);
 689                 }
 690
 691                 if (dh2q) {
 692                         const uint8_t *p = dh2q->data.data;
 693                         uint32_t durable_v2_timeout = 0;
 694                         DATA_BLOB create_guid_blob;
 695
 696                         if (dh2q->data.length != 32) {
 697                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 698                                 return tevent_req_post(req, ev);
 699                         }
 700
 701                         if (dhnq) {
 702                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 703                                 return tevent_req_post(req, ev);
 704                         }
 705
 706                         durable_v2_timeout = IVAL(p, 0);
 707                         create_guid_blob = data_blob_const(p + 16, 16);
 708
 709                         status = GUID_from_ndr_blob(&create_guid_blob,
 710                                                     &_create_guid);
 711                         if (tevent_req_nterror(req, status)) {
 712                                 return tevent_req_post(req, ev);
 713                         }
 714                         create_guid = &_create_guid;
 715                         /*
 716                          * we need to store the create_guid later
 717                          */
 718                         update_open = true;
 719
 720                         /*
 721                          * durable handle v2 request processed below
 722                          */
 723                         durable_requested = true;
 724                         durable_timeout_msec = durable_v2_timeout;
 725                         if (durable_timeout_msec == 0) {
 726                                 /*
 727                                  * Set the timeout to 1 min as default.
 728                                  *
 729                                  * This matches Windows 2012.
 730                                  */
 731                                 durable_timeout_msec = (60*1000);
 732                         }
 733                 }
 734
 735                 if (dhnc) {
 736                         persistent_id = BVAL(dhnc->data.data, 0);
 737
 738                         do_durable_reconnect = true;
 739                 }
 740
 741                 if (dh2c) {
 742                         const uint8_t *p = dh2c->data.data;
 743                         DATA_BLOB create_guid_blob;
 744
 745                         persistent_id = BVAL(p, 0);
 746                         create_guid_blob = data_blob_const(p + 16, 16);
 747
 748                         status = GUID_from_ndr_blob(&create_guid_blob,
 749                                                     &_create_guid);
 750                         if (tevent_req_nterror(req, status)) {
 751                                 return tevent_req_post(req, ev);
 752                         }
 753                         create_guid = &_create_guid;
 754
 755                         do_durable_reconnect = true;
 756                 }
 757
 758                 if (alsi) {
 759                         if (alsi->data.length != 8) {
 760                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 761                                 return tevent_req_post(req, ev);
 762                         }
 763                         allocation_size = BVAL(alsi->data.data, 0);
 764                 }
 765
 766                 if (twrp) {
 767                         NTTIME nttime;
 768                         time_t t;
 769                         struct tm *tm;
 770
 771                         if (twrp->data.length != 8) {
 772                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 773                                 return tevent_req_post(req, ev);
 774                         }
 775
 776                         nttime = BVAL(twrp->data.data, 0);
 777                         t = nt_time_to_unix(nttime);
 778                         tm = gmtime(&t);
 779
 780                         TALLOC_FREE(fname);
 781                         fname = talloc_asprintf(state,
 782                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 783                                         tm->tm_year + 1900,
 784                                         tm->tm_mon + 1,
 785                                         tm->tm_mday,
 786                                         tm->tm_hour,
 787                                         tm->tm_min,
 788                                         tm->tm_sec,
 789                                         in_name);
 790                         if (tevent_req_nomem(fname, req)) {
 791                                 return tevent_req_post(req, ev);
 792                         }
 793                 }
 794
 795                 if (qfid) {
 796                         if (qfid->data.length != 0) {
 797                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 798                                 return tevent_req_post(req, ev);
 799                         }
 800                 }
 801
 802                 /* these are ignored for SMB2 */
 803                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 804                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 805
 806                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 807
 808                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 809
 810                 /*
 811                  * For the backend file open procedure, there are
 812                  * two possible modes: durable_reconnect or not.
 813                  */
 814                 if (do_durable_reconnect) {
 815                         DATA_BLOB new_cookie = data_blob_null;
 816                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 817
 818                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 819                                                 smb1req->conn->session_info,
 820                                                 persistent_id, create_guid,
 821                                                 now, &op);
 822                         if (!NT_STATUS_IS_OK(status)) {
 823                                 DEBUG(3, ("smbd_smb2_create_send: "
 824                                           "smb2srv_open_recreate failed: %s\n",
 825                                           nt_errstr(status)));
 826                                 tevent_req_nterror(req, status);
 827                                 return tevent_req_post(req, ev);
 828                         }
 829
 830                         DEBUG(10, ("smb2_create_send: %s to recreate the "
 831                                    "smb2srv_open struct for a durable handle.\n",
 832                                    op->global->durable ? "succeded" : "failed"));
 833
 834                         if (!op->global->durable) {
 835                                 talloc_free(op);
 836                                 tevent_req_nterror(req,
 837                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 838                                 return tevent_req_post(req, ev);
 839                         }
 840
 841                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 842                                                 smb1req,
 843                                                 op, /* smbXsrv_open input */
 844                                                 op->global->backend_cookie,
 845                                                 op, /* TALLOC_CTX */
 846                                                 &result, &new_cookie);
 847                         if (!NT_STATUS_IS_OK(status)) {
 848                                 NTSTATUS return_status;
 849
 850                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 851
 852                                 DEBUG(3, ("smbd_smb2_create_send: "
 853                                           "durable_reconnect failed: %s => %s\n",
 854                                           nt_errstr(status),
 855                                           nt_errstr(return_status)));
 856
 857                                 tevent_req_nterror(req, return_status);
 858                                 return tevent_req_post(req, ev);
 859                         }
 860
 861                         data_blob_free(&op->global->backend_cookie);
 862                         op->global->backend_cookie = new_cookie;
 863
 864                         op->status = NT_STATUS_OK;
 865                         op->global->disconnect_time = 0;
 866
 867                         /* save the timout for later update */
 868                         durable_timeout_msec = op->global->durable_timeout_msec;
 869
 870                         update_open = true;
 871
 872                         info = FILE_WAS_OPENED;
 873                 } else {
 874                         struct smb_filename *smb_fname = NULL;
 875
 876                         /*
 877                          * For a DFS path the function parse_dfs_path()
 878                          * will do the path processing.
 879                          */
 880
 881                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 882                                 /* convert '\\' into '/' */
 883                                 status = check_path_syntax(fname);
 884                                 if (!NT_STATUS_IS_OK(status)) {
 885                                         tevent_req_nterror(req, status);
 886                                         return tevent_req_post(req, ev);
 887                                 }
 888                         }
 889
 890                         status = filename_convert(req,
 891                                                   smb1req->conn,
 892                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 893                                                   fname,
 894                                                   UCF_PREP_CREATEFILE,
 895                                                   NULL, /* ppath_contains_wcards */
 896                                                   &smb_fname);
 897                         if (!NT_STATUS_IS_OK(status)) {
 898                                 tevent_req_nterror(req, status);
 899                                 return tevent_req_post(req, ev);
 900                         }
 901
 902                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 903                                                      smb1req,
 904                                                      0, /* root_dir_fid */
 905                                                      smb_fname,
 906                                                      in_desired_access,
 907                                                      in_share_access,
 908                                                      in_create_disposition,
 909                                                      in_create_options,
 910                                                      in_file_attributes,
 911                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 912                                                      allocation_size,
 913                                                      0, /* private_flags */
 914                                                      sec_desc,
 915                                                      ea_list,
 916                                                      &result,
 917                                                      &info);
 918                         if (!NT_STATUS_IS_OK(status)) {
 919                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 920                                         return req;
 921                                 }
 922                                 tevent_req_nterror(req, status);
 923                                 return tevent_req_post(req, ev);
 924                         }
 925                         op = result->op;
 926                 }
 927
 928                 /*
 929                  * here we have op == result->op
 930                  */
 931
 932                 DEBUG(10, ("smbd_smb2_create_send: "
 933                            "response construction phase\n"));
 934
 935                 if (mxac) {
 936                         NTTIME last_write_time;
 937
 938                         unix_timespec_to_nt_time(&last_write_time,
 939                                                  result->fsp_name->st.st_ex_mtime);
 940                         if (last_write_time != max_access_time) {
 941                                 uint8_t p[8];
 942                                 uint32_t max_access_granted;
 943                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 944
 945                                 status = smbd_calculate_access_mask(smb1req->conn,
 946                                                         result->fsp_name,
 947                                                         false,
 948                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 949                                                         &max_access_granted);
 950
 951                                 SIVAL(p, 0, NT_STATUS_V(status));
 952                                 SIVAL(p, 4, max_access_granted);
 953
 954                                 status = smb2_create_blob_add(state,
 955                                                         &out_context_blobs,
 956                                                         SMB2_CREATE_TAG_MXAC,
 957                                                         blob);
 958                                 if (!NT_STATUS_IS_OK(status)) {
 959                                         tevent_req_nterror(req, status);
 960                                         return tevent_req_post(req, ev);
 961                                 }
 962                         }
 963                 }
 964
 965                 if (durable_requested &&
 966                     BATCH_OPLOCK_TYPE(result->oplock_type))
 967                 {
 968                         status = SMB_VFS_DURABLE_COOKIE(result,
 969                                                 op,
 970                                                 &op->global->backend_cookie);
 971                         if (!NT_STATUS_IS_OK(status)) {
 972                                 op->global->backend_cookie = data_blob_null;
 973                         }
 974                 }
 975                 if (op->global->backend_cookie.length > 0) {
 976                         update_open = true;
 977
 978                         op->global->durable = true;
 979                         op->global->durable_timeout_msec = durable_timeout_msec;
 980                 }
 981
 982                 if (update_open) {
 983                         op->global->create_guid = _create_guid;
 984
 985                         status = smbXsrv_open_update(op);
 986                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 987                                    "returned %s\n",
 988                                    nt_errstr(status)));
 989                         if (!NT_STATUS_IS_OK(status)) {
 990                                 tevent_req_nterror(req, status);
 991                                 return tevent_req_post(req, ev);
 992                         }
 993                 }
 994
 995                 if (dhnq && op->global->durable) {
 996                         uint8_t p[8] = { 0, };
 997                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 998
 999                         status = smb2_create_blob_add(state,
1000                                                       &out_context_blobs,
1001                                                       SMB2_CREATE_TAG_DHNQ,
1002                                                       blob);
1003                         if (!NT_STATUS_IS_OK(status)) {
1004                                 tevent_req_nterror(req, status);
1005                                 return tevent_req_post(req, ev);
1006                         }
1007                 }
1008
1009                 if (dh2q && op->global->durable) {
1010                         uint8_t p[8] = { 0, };
1011                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1012                         uint32_t durable_v2_response_flags = 0;
1013
1014                         SIVAL(p, 0, op->global->durable_timeout_msec);
1015                         SIVAL(p, 4, durable_v2_response_flags);
1016
1017                         status = smb2_create_blob_add(state, &out_context_blobs,
1018                                                       SMB2_CREATE_TAG_DH2Q,
1019                                                       blob);
1020                         if (!NT_STATUS_IS_OK(status)) {
1021                                 tevent_req_nterror(req, status);
1022                                 return tevent_req_post(req, ev);
1023                         }
1024                 }
1025
1026                 if (qfid) {
1027                         uint8_t p[32];
1028                         uint64_t file_index = get_FileIndex(result->conn,
1029                                                         &result->fsp_name->st);
1030                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1031
1032                         ZERO_STRUCT(p);
1033
1034                         /* From conversations with Microsoft engineers at
1035                            the MS plugfest. The first 8 bytes are the "volume index"
1036                            == inode, the second 8 bytes are the "volume id",
1037                            == dev. This will be updated in the SMB2 doc. */
1038                         SBVAL(p, 0, file_index);
1039                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1040
1041                         status = smb2_create_blob_add(state, &out_context_blobs,
1042                                                       SMB2_CREATE_TAG_QFID,
1043                                                       blob);
1044                         if (!NT_STATUS_IS_OK(status)) {
1045                                 tevent_req_nterror(req, status);
1046                                 return tevent_req_post(req, ev);
1047                         }
1048                 }
1049         }
1050
1051         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1052
1053         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1054                 state->out_oplock_level = in_oplock_level;
1055         } else {
1056                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1057         }
1058
1059         if ((in_create_disposition == FILE_SUPERSEDE)
1060             && (info == FILE_WAS_OVERWRITTEN)) {
1061                 state->out_create_action = FILE_WAS_SUPERSEDED;
1062         } else {
1063                 state->out_create_action = info;
1064         }
1065         state->out_file_attributes = dos_mode(result->conn,
1066                                            result->fsp_name);
1067
1068         unix_timespec_to_nt_time(&state->out_creation_time,
1069                         get_create_timespec(smb1req->conn, result,
1070                                         result->fsp_name));
1071         unix_timespec_to_nt_time(&state->out_last_access_time,
1072                         result->fsp_name->st.st_ex_atime);
1073         unix_timespec_to_nt_time(&state->out_last_write_time,
1074                         result->fsp_name->st.st_ex_mtime);
1075         unix_timespec_to_nt_time(&state->out_change_time,
1076                         get_change_timespec(smb1req->conn, result,
1077                                         result->fsp_name));
1078         state->out_allocation_size =
1079                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1080                                                &(result->fsp_name->st));
1081         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1082         if (state->out_file_attributes == 0) {
1083                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1084         }
1085         state->out_file_id_persistent = result->op->global->open_persistent_id;
1086         state->out_file_id_volatile = result->op->global->open_volatile_id;
1087         state->out_context_blobs = out_context_blobs;
1088
1089         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1090                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1091
1092         tevent_req_done(req);
1093         return tevent_req_post(req, ev);
1094 }
1095
1096 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1097                         TALLOC_CTX *mem_ctx,
1098                         uint8_t *out_oplock_level,
1099                         uint32_t *out_create_action,
1100                         NTTIME *out_creation_time,
1101                         NTTIME *out_last_access_time,
1102                         NTTIME *out_last_write_time,
1103                         NTTIME *out_change_time,
1104                         uint64_t *out_allocation_size,
1105                         uint64_t *out_end_of_file,
1106                         uint32_t *out_file_attributes,
1107                         uint64_t *out_file_id_persistent,
1108                         uint64_t *out_file_id_volatile,
1109                         struct smb2_create_blobs *out_context_blobs)
1110 {
1111         NTSTATUS status;
1112         struct smbd_smb2_create_state *state = tevent_req_data(req,
1113                                                struct smbd_smb2_create_state);
1114
1115         if (tevent_req_is_nterror(req, &status)) {
1116                 tevent_req_received(req);
1117                 return status;
1118         }
1119
1120         *out_oplock_level       = state->out_oplock_level;
1121         *out_create_action      = state->out_create_action;
1122         *out_creation_time      = state->out_creation_time;
1123         *out_last_access_time   = state->out_last_access_time;
1124         *out_last_write_time    = state->out_last_write_time;
1125         *out_change_time        = state->out_change_time;
1126         *out_allocation_size    = state->out_allocation_size;
1127         *out_end_of_file        = state->out_end_of_file;
1128         *out_file_attributes    = state->out_file_attributes;
1129         *out_file_id_persistent = state->out_file_id_persistent;
1130         *out_file_id_volatile   = state->out_file_id_volatile;
1131         *out_context_blobs      = state->out_context_blobs;
1132
1133         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1134
1135         tevent_req_received(req);
1136         return NT_STATUS_OK;
1137 }
1138
1139 /*********************************************************
1140  Code for dealing with deferred opens.
1141 *********************************************************/
1142
1143 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1144                         struct timeval *p_request_time,
1145                         void **pp_state)
1146 {
1147         struct smbd_smb2_create_state *state = NULL;
1148         struct tevent_req *req = NULL;
1149
1150         if (!smb2req) {
1151                 return false;
1152         }
1153         req = smb2req->subreq;
1154         if (!req) {
1155                 return false;
1156         }
1157         state = tevent_req_data(req, struct smbd_smb2_create_state);
1158         if (!state) {
1159                 return false;
1160         }
1161         if (!state->open_was_deferred) {
1162                 return false;
1163         }
1164         if (p_request_time) {
1165                 *p_request_time = state->request_time;
1166         }
1167         if (pp_state) {
1168                 *pp_state = (void *)state->private_data.data;
1169         }
1170         return true;
1171 }
1172
1173 /*********************************************************
1174  Re-process this call early - requested by message or
1175  close.
1176 *********************************************************/
1177
1178 static struct smbd_smb2_request *find_open_smb2req(
1179         struct smbd_server_connection *sconn, uint64_t mid)
1180 {
1181         struct smbd_smb2_request *smb2req;
1182
1183         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1184                 uint64_t message_id;
1185                 if (smb2req->subreq == NULL) {
1186                         /* This message has been processed. */
1187                         continue;
1188                 }
1189                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1190                         /* This message has been processed. */
1191                         continue;
1192                 }
1193                 message_id = get_mid_from_smb2req(smb2req);
1194                 if (message_id == mid) {
1195                         return smb2req;
1196                 }
1197         }
1198         return NULL;
1199 }
1200
1201 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1202 {
1203         struct smbd_smb2_create_state *state = NULL;
1204         struct smbd_smb2_request *smb2req;
1205
1206         smb2req = find_open_smb2req(sconn, mid);
1207
1208         if (!smb2req) {
1209                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1210                         (unsigned long long)mid));
1211                 return false;
1212         }
1213         if (!smb2req->subreq) {
1214                 return false;
1215         }
1216         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1217                 return false;
1218         }
1219         state = tevent_req_data(smb2req->subreq,
1220                         struct smbd_smb2_create_state);
1221         if (!state) {
1222                 return false;
1223         }
1224         /* It's not in progress if there's no timeout event. */
1225         if (!state->open_was_deferred) {
1226                 return false;
1227         }
1228
1229         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1230                         (unsigned long long)mid));
1231
1232         return true;
1233 }
1234
1235 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1236                                                         uint64_t mid)
1237 {
1238         struct smbd_smb2_create_state *state = NULL;
1239
1240         if (!smb2req->subreq) {
1241                 return;
1242         }
1243         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1244                 return;
1245         }
1246         state = tevent_req_data(smb2req->subreq,
1247                         struct smbd_smb2_create_state);
1248         if (!state) {
1249                 return;
1250         }
1251
1252         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1253                 "mid %llu\n",
1254                 (unsigned long long)mid ));
1255
1256         state->open_was_deferred = false;
1257         /* Ensure we don't have any outstanding timer event. */
1258         TALLOC_FREE(state->te);
1259         /* Ensure we don't have any outstanding immediate event. */
1260         TALLOC_FREE(state->im);
1261 }
1262
1263 void remove_deferred_open_message_smb2(
1264         struct smbd_server_connection *sconn, uint64_t mid)
1265 {
1266         struct smbd_smb2_request *smb2req;
1267
1268         smb2req = find_open_smb2req(sconn, mid);
1269
1270         if (!smb2req) {
1271                 DEBUG(10,("remove_deferred_open_message_smb2: "
1272                         "can't find mid %llu\n",
1273                         (unsigned long long)mid ));
1274                 return;
1275         }
1276         remove_deferred_open_message_smb2_internal(smb2req, mid);
1277 }
1278
1279 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1280                                         struct tevent_immediate *im,
1281                                         void *private_data)
1282 {
1283         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1284                                         struct smbd_smb2_request);
1285         struct smbd_server_connection *sconn = smb2req->sconn;
1286         uint64_t mid = get_mid_from_smb2req(smb2req);
1287         NTSTATUS status;
1288
1289         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1290                 "re-dispatching mid %llu\n",
1291                 (unsigned long long)mid ));
1292
1293         status = smbd_smb2_request_dispatch(smb2req);
1294         if (!NT_STATUS_IS_OK(status)) {
1295                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1296                 return;
1297         }
1298 }
1299
1300 bool schedule_deferred_open_message_smb2(
1301         struct smbd_server_connection *sconn, uint64_t mid)
1302 {
1303         struct smbd_smb2_create_state *state = NULL;
1304         struct smbd_smb2_request *smb2req;
1305
1306         smb2req = find_open_smb2req(sconn, mid);
1307
1308         if (!smb2req) {
1309                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1310                         "can't find mid %llu\n",
1311                         (unsigned long long)mid ));
1312                 return false;
1313         }
1314         if (!smb2req->subreq) {
1315                 return false;
1316         }
1317         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1318                 return false;
1319         }
1320         state = tevent_req_data(smb2req->subreq,
1321                         struct smbd_smb2_create_state);
1322         if (!state) {
1323                 return false;
1324         }
1325
1326         /* Ensure we don't have any outstanding timer event. */
1327         TALLOC_FREE(state->te);
1328         /* Ensure we don't have any outstanding immediate event. */
1329         TALLOC_FREE(state->im);
1330
1331         /*
1332          * This is subtle. We must null out the callback
1333          * before rescheduling, else the first call to
1334          * tevent_req_nterror() causes the _receive()
1335          * function to be called, this causing tevent_req_post()
1336          * to crash.
1337          */
1338         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1339
1340         state->im = tevent_create_immediate(smb2req);
1341         if (!state->im) {
1342                 smbd_server_connection_terminate(smb2req->sconn,
1343                         nt_errstr(NT_STATUS_NO_MEMORY));
1344                 return false;
1345         }
1346
1347         DEBUG(10,("schedule_deferred_open_message_smb2: "
1348                 "re-processing mid %llu\n",
1349                 (unsigned long long)mid ));
1350
1351         tevent_schedule_immediate(state->im,
1352                         smb2req->sconn->ev_ctx,
1353                         smbd_smb2_create_request_dispatch_immediate,
1354                         smb2req);
1355
1356         return true;
1357 }
1358
1359 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1360 {
1361         struct smbd_smb2_request *smb2req = NULL;
1362         struct smbd_smb2_create_state *state = tevent_req_data(req,
1363                                 struct smbd_smb2_create_state);
1364         uint64_t mid;
1365
1366         if (!state) {
1367                 return false;
1368         }
1369
1370         if (!state->smb2req) {
1371                 return false;
1372         }
1373
1374         smb2req = state->smb2req;
1375         mid = get_mid_from_smb2req(smb2req);
1376
1377         if (is_deferred_open_async(state->private_data.data)) {
1378                 /* Can't cancel an async create. */
1379                 return false;
1380         }
1381
1382         remove_deferred_open_message_smb2_internal(smb2req, mid);
1383
1384         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1385         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1386         return true;
1387 }
1388
1389 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1390                                 struct timeval request_time,
1391                                 struct timeval timeout,
1392                                 struct file_id id,
1393                                 char *private_data,
1394                                 size_t priv_len)
1395 {
1396         struct tevent_req *req = NULL;
1397         struct smbd_smb2_create_state *state = NULL;
1398         struct timeval end_time;
1399
1400         if (!smb2req) {
1401                 return false;
1402         }
1403         req = smb2req->subreq;
1404         if (!req) {
1405                 return false;
1406         }
1407         state = tevent_req_data(req, struct smbd_smb2_create_state);
1408         if (!state) {
1409                 return false;
1410         }
1411         state->id = id;
1412         state->request_time = request_time;
1413         state->private_data = data_blob_talloc(state, private_data,
1414                                                 priv_len);
1415         if (!state->private_data.data) {
1416                 return false;
1417         }
1418
1419         /* Re-schedule us to retry on timer expiry. */
1420         end_time = timeval_sum(&request_time, &timeout);
1421
1422         DEBUG(10,("push_deferred_open_message_smb2: "
1423                 "timeout at %s\n",
1424                 timeval_string(talloc_tos(),
1425                                 &end_time,
1426                                 true) ));
1427
1428         state->open_was_deferred = true;
1429
1430         /* allow this request to be canceled */
1431         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1432
1433         return true;
1434 }