source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "printing.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/smb/smb_common.h"
  27 #include "../librpc/gen_ndr/ndr_security.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29 #include "messages.h"
  30
  31 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  32 {
  33         switch(in_oplock_level) {
  34         case SMB2_OPLOCK_LEVEL_NONE:
  35                 return NO_OPLOCK;
  36         case SMB2_OPLOCK_LEVEL_II:
  37                 return LEVEL_II_OPLOCK;
  38         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  39                 return EXCLUSIVE_OPLOCK;
  40         case SMB2_OPLOCK_LEVEL_BATCH:
  41                 return BATCH_OPLOCK;
  42         case SMB2_OPLOCK_LEVEL_LEASE:
  43                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  44                         "LEASE_OPLOCK_REQUESTED\n"));
  45                 return NO_OPLOCK;
  46         default:
  47                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  48                         "unknown level %u\n",
  49                         (unsigned int)in_oplock_level));
  50                 return NO_OPLOCK;
  51         }
  52 }
  53
  54 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  55 {
  56         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  57                 return SMB2_OPLOCK_LEVEL_BATCH;
  58         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  59                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  60         } else if (oplock_type == LEVEL_II_OPLOCK) {
  61                 /*
  62                  * Don't use LEVEL_II_OPLOCK_TYPE here as
  63                  * this also includes FAKE_LEVEL_II_OPLOCKs
  64                  * which are internal only.
  65                  */
  66                 return SMB2_OPLOCK_LEVEL_II;
  67         } else {
  68                 return SMB2_OPLOCK_LEVEL_NONE;
  69         }
  70 }
  71
  72 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  73                         struct tevent_context *ev,
  74                         struct smbd_smb2_request *smb2req,
  75                         uint8_t in_oplock_level,
  76                         uint32_t in_impersonation_level,
  77                         uint32_t in_desired_access,
  78                         uint32_t in_file_attributes,
  79                         uint32_t in_share_access,
  80                         uint32_t in_create_disposition,
  81                         uint32_t in_create_options,
  82                         const char *in_name,
  83                         struct smb2_create_blobs in_context_blobs);
  84 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  85                         TALLOC_CTX *mem_ctx,
  86                         uint8_t *out_oplock_level,
  87                         uint32_t *out_create_action,
  88                         NTTIME *out_creation_time,
  89                         NTTIME *out_last_access_time,
  90                         NTTIME *out_last_write_time,
  91                         NTTIME *out_change_time,
  92                         uint64_t *out_allocation_size,
  93                         uint64_t *out_end_of_file,
  94                         uint32_t *out_file_attributes,
  95                         uint64_t *out_file_id_persistent,
  96                         uint64_t *out_file_id_volatile,
  97                         struct smb2_create_blobs *out_context_blobs);
  98
  99 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
 100 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
 101 {
 102         const uint8_t *inbody;
 103         const struct iovec *indyniov;
 104         uint8_t in_oplock_level;
 105         uint32_t in_impersonation_level;
 106         uint32_t in_desired_access;
 107         uint32_t in_file_attributes;
 108         uint32_t in_share_access;
 109         uint32_t in_create_disposition;
 110         uint32_t in_create_options;
 111         uint16_t in_name_offset;
 112         uint16_t in_name_length;
 113         DATA_BLOB in_name_buffer;
 114         char *in_name_string;
 115         size_t in_name_string_size;
 116         uint32_t name_offset = 0;
 117         uint32_t name_available_length = 0;
 118         uint32_t in_context_offset;
 119         uint32_t in_context_length;
 120         DATA_BLOB in_context_buffer;
 121         struct smb2_create_blobs in_context_blobs;
 122         uint32_t context_offset = 0;
 123         uint32_t context_available_length = 0;
 124         uint32_t dyn_offset;
 125         NTSTATUS status;
 126         bool ok;
 127         struct tevent_req *tsubreq;
 128
 129         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 130         if (!NT_STATUS_IS_OK(status)) {
 131                 return smbd_smb2_request_error(smb2req, status);
 132         }
 133         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 134
 135         in_oplock_level         = CVAL(inbody, 0x03);
 136         in_impersonation_level  = IVAL(inbody, 0x04);
 137         in_desired_access       = IVAL(inbody, 0x18);
 138         in_file_attributes      = IVAL(inbody, 0x1C);
 139         in_share_access         = IVAL(inbody, 0x20);
 140         in_create_disposition   = IVAL(inbody, 0x24);
 141         in_create_options       = IVAL(inbody, 0x28);
 142         in_name_offset          = SVAL(inbody, 0x2C);
 143         in_name_length          = SVAL(inbody, 0x2E);
 144         in_context_offset       = IVAL(inbody, 0x30);
 145         in_context_length       = IVAL(inbody, 0x34);
 146
 147         /*
 148          * First check if the dynamic name and context buffers
 149          * are correctly specified.
 150          *
 151          * Note: That we don't check if the name and context buffers
 152          *       overlap
 153          */
 154
 155         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 156
 157         if (in_name_offset == 0 && in_name_length == 0) {
 158                 /* This is ok */
 159                 name_offset = 0;
 160         } else if (in_name_offset < dyn_offset) {
 161                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 162         } else {
 163                 name_offset = in_name_offset - dyn_offset;
 164         }
 165
 166         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 167
 168         if (name_offset > indyniov->iov_len) {
 169                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 170         }
 171
 172         name_available_length = indyniov->iov_len - name_offset;
 173
 174         if (in_name_length > name_available_length) {
 175                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 176         }
 177
 178         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 179         in_name_buffer.length = in_name_length;
 180
 181         if (in_context_offset == 0 && in_context_length == 0) {
 182                 /* This is ok */
 183                 context_offset = 0;
 184         } else if (in_context_offset < dyn_offset) {
 185                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 186         } else {
 187                 context_offset = in_context_offset - dyn_offset;
 188         }
 189
 190         if (context_offset > indyniov->iov_len) {
 191                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 192         }
 193
 194         context_available_length = indyniov->iov_len - context_offset;
 195
 196         if (in_context_length > context_available_length) {
 197                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 198         }
 199
 200         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 201                 context_offset;
 202         in_context_buffer.length = in_context_length;
 203
 204         /*
 205          * Now interpret the name and context buffers
 206          */
 207
 208         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 209                                    in_name_buffer.data,
 210                                    in_name_buffer.length,
 211                                    &in_name_string,
 212                                    &in_name_string_size);
 213         if (!ok) {
 214                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 215         }
 216
 217         if (in_name_buffer.length == 0) {
 218                 in_name_string_size = 0;
 219         }
 220
 221         if (strlen(in_name_string) != in_name_string_size) {
 222                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 223         }
 224
 225         ZERO_STRUCT(in_context_blobs);
 226         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 227         if (!NT_STATUS_IS_OK(status)) {
 228                 return smbd_smb2_request_error(smb2req, status);
 229         }
 230
 231         tsubreq = smbd_smb2_create_send(smb2req,
 232                                        smb2req->sconn->ev_ctx,
 233                                        smb2req,
 234                                        in_oplock_level,
 235                                        in_impersonation_level,
 236                                        in_desired_access,
 237                                        in_file_attributes,
 238                                        in_share_access,
 239                                        in_create_disposition,
 240                                        in_create_options,
 241                                        in_name_string,
 242                                        in_context_blobs);
 243         if (tsubreq == NULL) {
 244                 smb2req->subreq = NULL;
 245                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 246         }
 247         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 248
 249         /*
 250          * For now we keep the logic that we do not send STATUS_PENDING
 251          * for sharing violations, so we just wait 2 seconds.
 252          *
 253          * TODO: we need more tests for this.
 254          */
 255         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 256 }
 257
 258 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 259 {
 260         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 261         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 262 }
 263
 264 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 265 {
 266         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 267                                         struct smbd_smb2_request);
 268         DATA_BLOB outbody;
 269         DATA_BLOB outdyn;
 270         uint8_t out_oplock_level = 0;
 271         uint32_t out_create_action = 0;
 272         NTTIME out_creation_time = 0;
 273         NTTIME out_last_access_time = 0;
 274         NTTIME out_last_write_time = 0;
 275         NTTIME out_change_time = 0;
 276         uint64_t out_allocation_size = 0;
 277         uint64_t out_end_of_file = 0;
 278         uint32_t out_file_attributes = 0;
 279         uint64_t out_file_id_persistent = 0;
 280         uint64_t out_file_id_volatile = 0;
 281         struct smb2_create_blobs out_context_blobs;
 282         DATA_BLOB out_context_buffer;
 283         uint16_t out_context_buffer_offset = 0;
 284         NTSTATUS status;
 285         NTSTATUS error; /* transport error */
 286
 287         status = smbd_smb2_create_recv(tsubreq,
 288                                        smb2req,
 289                                        &out_oplock_level,
 290                                        &out_create_action,
 291                                        &out_creation_time,
 292                                        &out_last_access_time,
 293                                        &out_last_write_time,
 294                                        &out_change_time,
 295                                        &out_allocation_size,
 296                                        &out_end_of_file,
 297                                        &out_file_attributes,
 298                                        &out_file_id_persistent,
 299                                        &out_file_id_volatile,
 300                                        &out_context_blobs);
 301         if (!NT_STATUS_IS_OK(status)) {
 302                 error = smbd_smb2_request_error(smb2req, status);
 303                 if (!NT_STATUS_IS_OK(error)) {
 304                         smbd_server_connection_terminate(smb2req->sconn,
 305                                                          nt_errstr(error));
 306                         return;
 307                 }
 308                 return;
 309         }
 310
 311         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 312         if (!NT_STATUS_IS_OK(status)) {
 313                 error = smbd_smb2_request_error(smb2req, status);
 314                 if (!NT_STATUS_IS_OK(error)) {
 315                         smbd_server_connection_terminate(smb2req->sconn,
 316                                                          nt_errstr(error));
 317                         return;
 318                 }
 319                 return;
 320         }
 321
 322         if (out_context_buffer.length > 0) {
 323                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 324         }
 325
 326         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 327         if (outbody.data == NULL) {
 328                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 329                 if (!NT_STATUS_IS_OK(error)) {
 330                         smbd_server_connection_terminate(smb2req->sconn,
 331                                                          nt_errstr(error));
 332                         return;
 333                 }
 334                 return;
 335         }
 336
 337         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 338         SCVAL(outbody.data, 0x02,
 339               out_oplock_level);                /* oplock level */
 340         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 341         SIVAL(outbody.data, 0x04,
 342               out_create_action);               /* create action */
 343         SBVAL(outbody.data, 0x08,
 344               out_creation_time);               /* creation time */
 345         SBVAL(outbody.data, 0x10,
 346               out_last_access_time);            /* last access time */
 347         SBVAL(outbody.data, 0x18,
 348               out_last_write_time);             /* last write time */
 349         SBVAL(outbody.data, 0x20,
 350               out_change_time);                 /* change time */
 351         SBVAL(outbody.data, 0x28,
 352               out_allocation_size);             /* allocation size */
 353         SBVAL(outbody.data, 0x30,
 354               out_end_of_file);                 /* end of file */
 355         SIVAL(outbody.data, 0x38,
 356               out_file_attributes);             /* file attributes */
 357         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 358         SBVAL(outbody.data, 0x40,
 359               out_file_id_persistent);          /* file id (persistent) */
 360         SBVAL(outbody.data, 0x48,
 361               out_file_id_volatile);            /* file id (volatile) */
 362         SIVAL(outbody.data, 0x50,
 363               out_context_buffer_offset);       /* create contexts offset */
 364         SIVAL(outbody.data, 0x54,
 365               out_context_buffer.length);       /* create contexts length */
 366
 367         outdyn = out_context_buffer;
 368
 369         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 370         if (!NT_STATUS_IS_OK(error)) {
 371                 smbd_server_connection_terminate(smb2req->sconn,
 372                                                  nt_errstr(error));
 373                 return;
 374         }
 375 }
 376
 377 struct smbd_smb2_create_state {
 378         struct smbd_smb2_request *smb2req;
 379         struct smb_request *smb1req;
 380         bool open_was_deferred;
 381         struct tevent_timer *te;
 382         struct tevent_immediate *im;
 383         struct timeval request_time;
 384         struct file_id id;
 385         DATA_BLOB private_data;
 386         uint8_t out_oplock_level;
 387         uint32_t out_create_action;
 388         NTTIME out_creation_time;
 389         NTTIME out_last_access_time;
 390         NTTIME out_last_write_time;
 391         NTTIME out_change_time;
 392         uint64_t out_allocation_size;
 393         uint64_t out_end_of_file;
 394         uint32_t out_file_attributes;
 395         uint64_t out_file_id_persistent;
 396         uint64_t out_file_id_volatile;
 397         struct smb2_create_blobs out_context_blobs;
 398 };
 399
 400 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 401                         struct tevent_context *ev,
 402                         struct smbd_smb2_request *smb2req,
 403                         uint8_t in_oplock_level,
 404                         uint32_t in_impersonation_level,
 405                         uint32_t in_desired_access,
 406                         uint32_t in_file_attributes,
 407                         uint32_t in_share_access,
 408                         uint32_t in_create_disposition,
 409                         uint32_t in_create_options,
 410                         const char *in_name,
 411                         struct smb2_create_blobs in_context_blobs)
 412 {
 413         struct tevent_req *req = NULL;
 414         struct smbd_smb2_create_state *state = NULL;
 415         NTSTATUS status;
 416         struct smb_request *smb1req = NULL;
 417         files_struct *result = NULL;
 418         int info;
 419         struct timespec write_time_ts;
 420         struct smb2_create_blobs out_context_blobs;
 421         int requested_oplock_level;
 422         struct smb2_create_blob *dhnc = NULL;
 423         struct smb2_create_blob *dh2c = NULL;
 424         struct smb2_create_blob *dhnq = NULL;
 425         struct smb2_create_blob *dh2q = NULL;
 426         struct smbXsrv_open *op = NULL;
 427
 428         ZERO_STRUCT(out_context_blobs);
 429
 430         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 431                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 432         } else {
 433                 requested_oplock_level = in_oplock_level;
 434         }
 435
 436
 437         if (smb2req->subreq == NULL) {
 438                 /* New create call. */
 439                 req = tevent_req_create(mem_ctx, &state,
 440                                 struct smbd_smb2_create_state);
 441                 if (req == NULL) {
 442                         return NULL;
 443                 }
 444                 state->smb2req = smb2req;
 445
 446                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 447                 if (tevent_req_nomem(smb1req, req)) {
 448                         return tevent_req_post(req, ev);
 449                 }
 450                 state->smb1req = smb1req;
 451                 smb2req->subreq = req;
 452                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 453                         in_name));
 454         } else {
 455                 /* Re-entrant create call. */
 456                 req = smb2req->subreq;
 457                 state = tevent_req_data(req,
 458                                 struct smbd_smb2_create_state);
 459                 smb1req = state->smb1req;
 460                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 461                         in_name ));
 462         }
 463
 464         dhnq = smb2_create_blob_find(&in_context_blobs,
 465                                      SMB2_CREATE_TAG_DHNQ);
 466         dhnc = smb2_create_blob_find(&in_context_blobs,
 467                                      SMB2_CREATE_TAG_DHNC);
 468         dh2q = smb2_create_blob_find(&in_context_blobs,
 469                                      SMB2_CREATE_TAG_DH2Q);
 470         dh2c = smb2_create_blob_find(&in_context_blobs,
 471                                      SMB2_CREATE_TAG_DH2C);
 472
 473         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 474             (dh2q && dh2c))
 475         {
 476                 /* not both are allowed at the same time */
 477                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 478                 return tevent_req_post(req, ev);
 479         }
 480
 481         if (dhnc) {
 482                 if (dhnc->data.length != 16) {
 483                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 484                         return tevent_req_post(req, ev);
 485                 }
 486                 if (in_context_blobs.num_blobs != 1) {
 487                         /*
 488                          * DHNC should be the only one.
 489                          * TODO: This is only true for the oplock case!
 490                          * For leases, lease request is required additionally!
 491                          */
 492                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 493                         return tevent_req_post(req, ev);
 494                 }
 495         }
 496
 497         if (dh2c) {
 498                 if (dh2c->data.length != 36) {
 499                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 500                         return tevent_req_post(req, ev);
 501                 }
 502                 if (in_context_blobs.num_blobs != 1) {
 503                         /*
 504                          * DH2C should be the only one.
 505                          * TODO: This is only true for the oplock case!
 506                          * For leases, lease request is required additionally!
 507                          */
 508                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 509                         return tevent_req_post(req, ev);
 510                 }
 511         }
 512
 513         if (IS_IPC(smb1req->conn)) {
 514                 const char *pipe_name = in_name;
 515
 516                 if (dhnc || dh2c) {
 517                         /* durable handles are not supported on IPC$ */
 518                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 519                         return tevent_req_post(req, ev);
 520                 }
 521
 522                 if (!lp_nt_pipe_support()) {
 523                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 524                         return tevent_req_post(req, ev);
 525                 }
 526
 527                 status = open_np_file(smb1req, pipe_name, &result);
 528                 if (!NT_STATUS_IS_OK(status)) {
 529                         tevent_req_nterror(req, status);
 530                         return tevent_req_post(req, ev);
 531                 }
 532                 info = FILE_WAS_OPENED;
 533         } else if (CAN_PRINT(smb1req->conn)) {
 534                 if (dhnc || dh2c) {
 535                         /* durable handles are not supported on printers */
 536                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 537                         return tevent_req_post(req, ev);
 538                 }
 539
 540                 status = file_new(smb1req, smb1req->conn, &result);
 541                 if(!NT_STATUS_IS_OK(status)) {
 542                         tevent_req_nterror(req, status);
 543                         return tevent_req_post(req, ev);
 544                 }
 545
 546                 status = print_spool_open(result, in_name,
 547                                           smb1req->vuid);
 548                 if (!NT_STATUS_IS_OK(status)) {
 549                         file_free(smb1req, result);
 550                         tevent_req_nterror(req, status);
 551                         return tevent_req_post(req, ev);
 552                 }
 553                 info = FILE_WAS_CREATED;
 554         } else {
 555                 char *fname;
 556                 struct smb2_create_blob *exta = NULL;
 557                 struct ea_list *ea_list = NULL;
 558                 struct smb2_create_blob *mxac = NULL;
 559                 NTTIME max_access_time = 0;
 560                 struct smb2_create_blob *secd = NULL;
 561                 struct security_descriptor *sec_desc = NULL;
 562                 struct smb2_create_blob *alsi = NULL;
 563                 uint64_t allocation_size = 0;
 564                 struct smb2_create_blob *twrp = NULL;
 565                 struct smb2_create_blob *qfid = NULL;
 566                 struct GUID _create_guid = GUID_zero();
 567                 struct GUID *create_guid = NULL;
 568                 bool update_open = false;
 569                 bool durable_requested = false;
 570                 uint32_t durable_timeout_msec = 0;
 571                 bool do_durable_reconnect = false;
 572                 uint64_t persistent_id = 0;
 573
 574                 exta = smb2_create_blob_find(&in_context_blobs,
 575                                              SMB2_CREATE_TAG_EXTA);
 576                 mxac = smb2_create_blob_find(&in_context_blobs,
 577                                              SMB2_CREATE_TAG_MXAC);
 578                 secd = smb2_create_blob_find(&in_context_blobs,
 579                                              SMB2_CREATE_TAG_SECD);
 580                 alsi = smb2_create_blob_find(&in_context_blobs,
 581                                              SMB2_CREATE_TAG_ALSI);
 582                 twrp = smb2_create_blob_find(&in_context_blobs,
 583                                              SMB2_CREATE_TAG_TWRP);
 584                 qfid = smb2_create_blob_find(&in_context_blobs,
 585                                              SMB2_CREATE_TAG_QFID);
 586
 587                 fname = talloc_strdup(state, in_name);
 588                 if (tevent_req_nomem(fname, req)) {
 589                         return tevent_req_post(req, ev);
 590                 }
 591
 592                 if (exta) {
 593                         ea_list = read_nttrans_ea_list(mem_ctx,
 594                                 (const char *)exta->data.data, exta->data.length);
 595                         if (!ea_list) {
 596                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 597                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 598                                 return tevent_req_post(req, ev);
 599                         }
 600
 601                         if (ea_list_has_invalid_name(ea_list)) {
 602                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 603                                 return tevent_req_post(req, ev);
 604                         }
 605                 }
 606
 607                 if (mxac) {
 608                         if (mxac->data.length == 0) {
 609                                 max_access_time = 0;
 610                         } else if (mxac->data.length == 8) {
 611                                 max_access_time = BVAL(mxac->data.data, 0);
 612                         } else {
 613                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 614                                 return tevent_req_post(req, ev);
 615                         }
 616                 }
 617
 618                 if (secd) {
 619                         enum ndr_err_code ndr_err;
 620
 621                         sec_desc = talloc_zero(state, struct security_descriptor);
 622                         if (tevent_req_nomem(sec_desc, req)) {
 623                                 return tevent_req_post(req, ev);
 624                         }
 625
 626                         ndr_err = ndr_pull_struct_blob(&secd->data,
 627                                 sec_desc, sec_desc,
 628                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 629                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 630                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 631                                          ndr_errstr(ndr_err)));
 632                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 633                                 return tevent_req_post(req, ev);
 634                         }
 635                 }
 636
 637                 if (dhnq) {
 638                         if (dhnq->data.length != 16) {
 639                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 640                                 return tevent_req_post(req, ev);
 641                         }
 642
 643                         if (dh2q) {
 644                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 645                                 return tevent_req_post(req, ev);
 646                         }
 647
 648                         /*
 649                          * durable handle request is processed below.
 650                          */
 651                         durable_requested = true;
 652                         /*
 653                          * Set the timeout to 16 mins.
 654                          *
 655                          * TODO: test this against Windows 2012
 656                          *       as the default for durable v2 is 1 min.
 657                          */
 658                         durable_timeout_msec = (16*60*1000);
 659                 }
 660
 661                 if (dh2q) {
 662                         const uint8_t *p = dh2q->data.data;
 663                         uint32_t durable_v2_timeout = 0;
 664                         DATA_BLOB create_guid_blob;
 665
 666                         if (dh2q->data.length != 32) {
 667                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 668                                 return tevent_req_post(req, ev);
 669                         }
 670
 671                         if (dhnq) {
 672                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 673                                 return tevent_req_post(req, ev);
 674                         }
 675
 676                         durable_v2_timeout = IVAL(p, 0);
 677                         create_guid_blob = data_blob_const(p + 16, 16);
 678
 679                         status = GUID_from_ndr_blob(&create_guid_blob,
 680                                                     &_create_guid);
 681                         if (tevent_req_nterror(req, status)) {
 682                                 return tevent_req_post(req, ev);
 683                         }
 684                         create_guid = &_create_guid;
 685                         /*
 686                          * we need to store the create_guid later
 687                          */
 688                         update_open = true;
 689
 690                         /*
 691                          * durable handle v2 request processed below
 692                          */
 693                         durable_requested = true;
 694                         durable_timeout_msec = durable_v2_timeout;
 695                         if (durable_timeout_msec == 0) {
 696                                 /*
 697                                  * Set the timeout to 1 min as default.
 698                                  *
 699                                  * This matches Windows 2012.
 700                                  */
 701                                 durable_timeout_msec = (60*1000);
 702                         }
 703                 }
 704
 705                 if (dhnc) {
 706                         persistent_id = BVAL(dhnc->data.data, 0);
 707
 708                         do_durable_reconnect = true;
 709                 }
 710
 711                 if (dh2c) {
 712                         const uint8_t *p = dh2c->data.data;
 713                         DATA_BLOB create_guid_blob;
 714
 715                         persistent_id = BVAL(p, 0);
 716                         create_guid_blob = data_blob_const(p + 16, 16);
 717
 718                         status = GUID_from_ndr_blob(&create_guid_blob,
 719                                                     &_create_guid);
 720                         if (tevent_req_nterror(req, status)) {
 721                                 return tevent_req_post(req, ev);
 722                         }
 723                         create_guid = &_create_guid;
 724
 725                         do_durable_reconnect = true;
 726                 }
 727
 728                 if (alsi) {
 729                         if (alsi->data.length != 8) {
 730                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 731                                 return tevent_req_post(req, ev);
 732                         }
 733                         allocation_size = BVAL(alsi->data.data, 0);
 734                 }
 735
 736                 if (twrp) {
 737                         NTTIME nttime;
 738                         time_t t;
 739                         struct tm *tm;
 740
 741                         if (twrp->data.length != 8) {
 742                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 743                                 return tevent_req_post(req, ev);
 744                         }
 745
 746                         nttime = BVAL(twrp->data.data, 0);
 747                         t = nt_time_to_unix(nttime);
 748                         tm = gmtime(&t);
 749
 750                         TALLOC_FREE(fname);
 751                         fname = talloc_asprintf(state,
 752                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 753                                         tm->tm_year + 1900,
 754                                         tm->tm_mon + 1,
 755                                         tm->tm_mday,
 756                                         tm->tm_hour,
 757                                         tm->tm_min,
 758                                         tm->tm_sec,
 759                                         in_name);
 760                         if (tevent_req_nomem(fname, req)) {
 761                                 return tevent_req_post(req, ev);
 762                         }
 763                 }
 764
 765                 if (qfid) {
 766                         if (qfid->data.length != 0) {
 767                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 768                                 return tevent_req_post(req, ev);
 769                         }
 770                 }
 771
 772                 /* these are ignored for SMB2 */
 773                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 774                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 775
 776                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 777
 778                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 779
 780                 /*
 781                  * For the backend file open procedure, there are
 782                  * two possible modes: durable_reconnect or not.
 783                  */
 784                 if (do_durable_reconnect) {
 785                         DATA_BLOB new_cookie = data_blob_null;
 786                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 787
 788                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 789                                                 smb1req->conn->session_info,
 790                                                 persistent_id, create_guid,
 791                                                 now, &op);
 792                         if (!NT_STATUS_IS_OK(status)) {
 793                                 DEBUG(3, ("smbd_smb2_create_send: "
 794                                           "smb2srv_open_recreate failed: %s\n",
 795                                           nt_errstr(status)));
 796                                 tevent_req_nterror(req, status);
 797                                 return tevent_req_post(req, ev);
 798                         }
 799
 800                         DEBUG(10, ("smb2_create_send: %s to recreate the "
 801                                    "smb2srv_open struct for a durable handle.\n",
 802                                    op->global->durable ? "succeded" : "failed"));
 803
 804                         if (!op->global->durable) {
 805                                 talloc_free(op);
 806                                 tevent_req_nterror(req,
 807                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 808                                 return tevent_req_post(req, ev);
 809                         }
 810
 811                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 812                                                 smb1req,
 813                                                 op, /* smbXsrv_open input */
 814                                                 op->global->backend_cookie,
 815                                                 op, /* TALLOC_CTX */
 816                                                 &result, &new_cookie);
 817                         if (!NT_STATUS_IS_OK(status)) {
 818                                 NTSTATUS return_status;
 819
 820                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 821
 822                                 DEBUG(3, ("smbd_smb2_create_send: "
 823                                           "durable_reconnect failed: %s => %s\n",
 824                                           nt_errstr(status),
 825                                           nt_errstr(return_status)));
 826
 827                                 tevent_req_nterror(req, return_status);
 828                                 return tevent_req_post(req, ev);
 829                         }
 830
 831                         data_blob_free(&op->global->backend_cookie);
 832                         op->global->backend_cookie = new_cookie;
 833
 834                         op->status = NT_STATUS_OK;
 835                         op->global->disconnect_time = 0;
 836
 837                         /* save the timout for later update */
 838                         durable_timeout_msec = op->global->durable_timeout_msec;
 839
 840                         update_open = true;
 841
 842                         info = FILE_WAS_OPENED;
 843                 } else {
 844                         struct smb_filename *smb_fname = NULL;
 845
 846                         /*
 847                          * For a DFS path the function parse_dfs_path()
 848                          * will do the path processing.
 849                          */
 850
 851                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 852                                 /* convert '\\' into '/' */
 853                                 status = check_path_syntax(fname);
 854                                 if (!NT_STATUS_IS_OK(status)) {
 855                                         tevent_req_nterror(req, status);
 856                                         return tevent_req_post(req, ev);
 857                                 }
 858                         }
 859
 860                         status = filename_convert(req,
 861                                                   smb1req->conn,
 862                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 863                                                   fname,
 864                                                   (in_create_disposition == FILE_CREATE) ?
 865                                                   UCF_CREATING_FILE : 0,
 866                                                   NULL, /* ppath_contains_wcards */
 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                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 874                                                      smb1req,
 875                                                      0, /* root_dir_fid */
 876                                                      smb_fname,
 877                                                      in_desired_access,
 878                                                      in_share_access,
 879                                                      in_create_disposition,
 880                                                      in_create_options,
 881                                                      in_file_attributes,
 882                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 883                                                      allocation_size,
 884                                                      0, /* private_flags */
 885                                                      sec_desc,
 886                                                      ea_list,
 887                                                      &result,
 888                                                      &info);
 889                         if (!NT_STATUS_IS_OK(status)) {
 890                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 891                                         return req;
 892                                 }
 893                                 tevent_req_nterror(req, status);
 894                                 return tevent_req_post(req, ev);
 895                         }
 896                         op = result->op;
 897                 }
 898
 899                 /*
 900                  * here we have op == result->op
 901                  */
 902
 903                 DEBUG(10, ("smbd_smb2_create_send: "
 904                            "response construction phase\n"));
 905
 906                 if (mxac) {
 907                         NTTIME last_write_time;
 908
 909                         unix_timespec_to_nt_time(&last_write_time,
 910                                                  result->fsp_name->st.st_ex_mtime);
 911                         if (last_write_time != max_access_time) {
 912                                 uint8_t p[8];
 913                                 uint32_t max_access_granted;
 914                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 915
 916                                 status = smbd_calculate_access_mask(smb1req->conn,
 917                                                         result->fsp_name,
 918                                                         false,
 919                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 920                                                         &max_access_granted);
 921
 922                                 SIVAL(p, 0, NT_STATUS_V(status));
 923                                 SIVAL(p, 4, max_access_granted);
 924
 925                                 status = smb2_create_blob_add(state,
 926                                                         &out_context_blobs,
 927                                                         SMB2_CREATE_TAG_MXAC,
 928                                                         blob);
 929                                 if (!NT_STATUS_IS_OK(status)) {
 930                                         tevent_req_nterror(req, status);
 931                                         return tevent_req_post(req, ev);
 932                                 }
 933                         }
 934                 }
 935
 936                 if (durable_requested &&
 937                     BATCH_OPLOCK_TYPE(result->oplock_type))
 938                 {
 939                         status = SMB_VFS_DURABLE_COOKIE(result,
 940                                                 op,
 941                                                 &op->global->backend_cookie);
 942                         if (!NT_STATUS_IS_OK(status)) {
 943                                 op->global->backend_cookie = data_blob_null;
 944                         }
 945                 }
 946                 if (op->global->backend_cookie.length > 0) {
 947                         update_open = true;
 948
 949                         op->global->durable = true;
 950                         op->global->durable_timeout_msec = durable_timeout_msec;
 951                 }
 952
 953                 if (update_open) {
 954                         op->global->create_guid = _create_guid;
 955
 956                         status = smbXsrv_open_update(op);
 957                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 958                                    "returned %s\n",
 959                                    nt_errstr(status)));
 960                         if (!NT_STATUS_IS_OK(status)) {
 961                                 tevent_req_nterror(req, status);
 962                                 return tevent_req_post(req, ev);
 963                         }
 964                 }
 965
 966                 if (dhnq && op->global->durable) {
 967                         uint8_t p[8] = { 0, };
 968                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 969
 970                         status = smb2_create_blob_add(state,
 971                                                       &out_context_blobs,
 972                                                       SMB2_CREATE_TAG_DHNQ,
 973                                                       blob);
 974                         if (!NT_STATUS_IS_OK(status)) {
 975                                 tevent_req_nterror(req, status);
 976                                 return tevent_req_post(req, ev);
 977                         }
 978                 }
 979
 980                 if (dh2q && op->global->durable) {
 981                         uint8_t p[8] = { 0, };
 982                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 983                         uint32_t durable_v2_response_flags = 0;
 984
 985                         SIVAL(p, 0, op->global->durable_timeout_msec);
 986                         SIVAL(p, 4, durable_v2_response_flags);
 987
 988                         status = smb2_create_blob_add(state, &out_context_blobs,
 989                                                       SMB2_CREATE_TAG_DH2Q,
 990                                                       blob);
 991                         if (!NT_STATUS_IS_OK(status)) {
 992                                 tevent_req_nterror(req, status);
 993                                 return tevent_req_post(req, ev);
 994                         }
 995                 }
 996
 997                 if (qfid) {
 998                         uint8_t p[32];
 999                         uint64_t file_index = get_FileIndex(result->conn,
1000                                                         &result->fsp_name->st);
1001                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1002
1003                         ZERO_STRUCT(p);
1004
1005                         /* From conversations with Microsoft engineers at
1006                            the MS plugfest. The first 8 bytes are the "volume index"
1007                            == inode, the second 8 bytes are the "volume id",
1008                            == dev. This will be updated in the SMB2 doc. */
1009                         SBVAL(p, 0, file_index);
1010                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1011
1012                         status = smb2_create_blob_add(state, &out_context_blobs,
1013                                                       SMB2_CREATE_TAG_QFID,
1014                                                       blob);
1015                         if (!NT_STATUS_IS_OK(status)) {
1016                                 tevent_req_nterror(req, status);
1017                                 return tevent_req_post(req, ev);
1018                         }
1019                 }
1020         }
1021
1022         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1023
1024         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1025                 state->out_oplock_level = in_oplock_level;
1026         } else {
1027                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1028         }
1029
1030         if ((in_create_disposition == FILE_SUPERSEDE)
1031             && (info == FILE_WAS_OVERWRITTEN)) {
1032                 state->out_create_action = FILE_WAS_SUPERSEDED;
1033         } else {
1034                 state->out_create_action = info;
1035         }
1036         state->out_file_attributes = dos_mode(result->conn,
1037                                            result->fsp_name);
1038         /* Deal with other possible opens having a modified
1039            write time. JRA. */
1040         ZERO_STRUCT(write_time_ts);
1041         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1042         if (!null_timespec(write_time_ts)) {
1043                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1044         }
1045
1046         unix_timespec_to_nt_time(&state->out_creation_time,
1047                         get_create_timespec(smb1req->conn, result,
1048                                         result->fsp_name));
1049         unix_timespec_to_nt_time(&state->out_last_access_time,
1050                         result->fsp_name->st.st_ex_atime);
1051         unix_timespec_to_nt_time(&state->out_last_write_time,
1052                         result->fsp_name->st.st_ex_mtime);
1053         unix_timespec_to_nt_time(&state->out_change_time,
1054                         get_change_timespec(smb1req->conn, result,
1055                                         result->fsp_name));
1056         state->out_allocation_size =
1057                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1058                                                &(result->fsp_name->st));
1059         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1060         if (state->out_file_attributes == 0) {
1061                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1062         }
1063         state->out_file_id_persistent = result->op->global->open_persistent_id;
1064         state->out_file_id_volatile = result->op->global->open_volatile_id;
1065         state->out_context_blobs = out_context_blobs;
1066
1067         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1068                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1069
1070         tevent_req_done(req);
1071         return tevent_req_post(req, ev);
1072 }
1073
1074 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1075                         TALLOC_CTX *mem_ctx,
1076                         uint8_t *out_oplock_level,
1077                         uint32_t *out_create_action,
1078                         NTTIME *out_creation_time,
1079                         NTTIME *out_last_access_time,
1080                         NTTIME *out_last_write_time,
1081                         NTTIME *out_change_time,
1082                         uint64_t *out_allocation_size,
1083                         uint64_t *out_end_of_file,
1084                         uint32_t *out_file_attributes,
1085                         uint64_t *out_file_id_persistent,
1086                         uint64_t *out_file_id_volatile,
1087                         struct smb2_create_blobs *out_context_blobs)
1088 {
1089         NTSTATUS status;
1090         struct smbd_smb2_create_state *state = tevent_req_data(req,
1091                                                struct smbd_smb2_create_state);
1092
1093         if (tevent_req_is_nterror(req, &status)) {
1094                 tevent_req_received(req);
1095                 return status;
1096         }
1097
1098         *out_oplock_level       = state->out_oplock_level;
1099         *out_create_action      = state->out_create_action;
1100         *out_creation_time      = state->out_creation_time;
1101         *out_last_access_time   = state->out_last_access_time;
1102         *out_last_write_time    = state->out_last_write_time;
1103         *out_change_time        = state->out_change_time;
1104         *out_allocation_size    = state->out_allocation_size;
1105         *out_end_of_file        = state->out_end_of_file;
1106         *out_file_attributes    = state->out_file_attributes;
1107         *out_file_id_persistent = state->out_file_id_persistent;
1108         *out_file_id_volatile   = state->out_file_id_volatile;
1109         *out_context_blobs      = state->out_context_blobs;
1110
1111         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1112
1113         tevent_req_received(req);
1114         return NT_STATUS_OK;
1115 }
1116
1117 /*********************************************************
1118  Code for dealing with deferred opens.
1119 *********************************************************/
1120
1121 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1122                         struct timeval *p_request_time,
1123                         void **pp_state)
1124 {
1125         struct smbd_smb2_create_state *state = NULL;
1126         struct tevent_req *req = NULL;
1127
1128         if (!smb2req) {
1129                 return false;
1130         }
1131         req = smb2req->subreq;
1132         if (!req) {
1133                 return false;
1134         }
1135         state = tevent_req_data(req, struct smbd_smb2_create_state);
1136         if (!state) {
1137                 return false;
1138         }
1139         if (!state->open_was_deferred) {
1140                 return false;
1141         }
1142         if (p_request_time) {
1143                 *p_request_time = state->request_time;
1144         }
1145         if (pp_state) {
1146                 *pp_state = (void *)state->private_data.data;
1147         }
1148         return true;
1149 }
1150
1151 /*********************************************************
1152  Re-process this call early - requested by message or
1153  close.
1154 *********************************************************/
1155
1156 static struct smbd_smb2_request *find_open_smb2req(
1157         struct smbd_server_connection *sconn, uint64_t mid)
1158 {
1159         struct smbd_smb2_request *smb2req;
1160
1161         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1162                 uint64_t message_id;
1163                 if (smb2req->subreq == NULL) {
1164                         /* This message has been processed. */
1165                         continue;
1166                 }
1167                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1168                         /* This message has been processed. */
1169                         continue;
1170                 }
1171                 message_id = get_mid_from_smb2req(smb2req);
1172                 if (message_id == mid) {
1173                         return smb2req;
1174                 }
1175         }
1176         return NULL;
1177 }
1178
1179 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1180 {
1181         struct smbd_smb2_create_state *state = NULL;
1182         struct smbd_smb2_request *smb2req;
1183
1184         smb2req = find_open_smb2req(sconn, mid);
1185
1186         if (!smb2req) {
1187                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1188                         (unsigned long long)mid));
1189                 return false;
1190         }
1191         if (!smb2req->subreq) {
1192                 return false;
1193         }
1194         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1195                 return false;
1196         }
1197         state = tevent_req_data(smb2req->subreq,
1198                         struct smbd_smb2_create_state);
1199         if (!state) {
1200                 return false;
1201         }
1202         /* It's not in progress if there's no timeout event. */
1203         if (!state->open_was_deferred) {
1204                 return false;
1205         }
1206
1207         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1208                         (unsigned long long)mid));
1209
1210         return true;
1211 }
1212
1213 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1214                                                         uint64_t mid)
1215 {
1216         struct smbd_smb2_create_state *state = NULL;
1217
1218         if (!smb2req->subreq) {
1219                 return;
1220         }
1221         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1222                 return;
1223         }
1224         state = tevent_req_data(smb2req->subreq,
1225                         struct smbd_smb2_create_state);
1226         if (!state) {
1227                 return;
1228         }
1229
1230         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1231                 "mid %llu\n",
1232                 (unsigned long long)mid ));
1233
1234         state->open_was_deferred = false;
1235         /* Ensure we don't have any outstanding timer event. */
1236         TALLOC_FREE(state->te);
1237         /* Ensure we don't have any outstanding immediate event. */
1238         TALLOC_FREE(state->im);
1239 }
1240
1241 void remove_deferred_open_message_smb2(
1242         struct smbd_server_connection *sconn, uint64_t mid)
1243 {
1244         struct smbd_smb2_request *smb2req;
1245
1246         smb2req = find_open_smb2req(sconn, mid);
1247
1248         if (!smb2req) {
1249                 DEBUG(10,("remove_deferred_open_message_smb2: "
1250                         "can't find mid %llu\n",
1251                         (unsigned long long)mid ));
1252                 return;
1253         }
1254         remove_deferred_open_message_smb2_internal(smb2req, mid);
1255 }
1256
1257 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1258                                         struct tevent_immediate *im,
1259                                         void *private_data)
1260 {
1261         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1262                                         struct smbd_smb2_request);
1263         struct smbd_server_connection *sconn = smb2req->sconn;
1264         uint64_t mid = get_mid_from_smb2req(smb2req);
1265         NTSTATUS status;
1266
1267         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1268                 "re-dispatching mid %llu\n",
1269                 (unsigned long long)mid ));
1270
1271         status = smbd_smb2_request_dispatch(smb2req);
1272         if (!NT_STATUS_IS_OK(status)) {
1273                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1274                 return;
1275         }
1276 }
1277
1278 bool schedule_deferred_open_message_smb2(
1279         struct smbd_server_connection *sconn, uint64_t mid)
1280 {
1281         struct smbd_smb2_create_state *state = NULL;
1282         struct smbd_smb2_request *smb2req;
1283
1284         smb2req = find_open_smb2req(sconn, mid);
1285
1286         if (!smb2req) {
1287                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1288                         "can't find mid %llu\n",
1289                         (unsigned long long)mid ));
1290                 return false;
1291         }
1292         if (!smb2req->subreq) {
1293                 return false;
1294         }
1295         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1296                 return false;
1297         }
1298         state = tevent_req_data(smb2req->subreq,
1299                         struct smbd_smb2_create_state);
1300         if (!state) {
1301                 return false;
1302         }
1303
1304         /* Ensure we don't have any outstanding timer event. */
1305         TALLOC_FREE(state->te);
1306         /* Ensure we don't have any outstanding immediate event. */
1307         TALLOC_FREE(state->im);
1308
1309         /*
1310          * This is subtle. We must null out the callback
1311          * before rescheduling, else the first call to
1312          * tevent_req_nterror() causes the _receive()
1313          * function to be called, this causing tevent_req_post()
1314          * to crash.
1315          */
1316         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1317
1318         state->im = tevent_create_immediate(smb2req);
1319         if (!state->im) {
1320                 smbd_server_connection_terminate(smb2req->sconn,
1321                         nt_errstr(NT_STATUS_NO_MEMORY));
1322                 return false;
1323         }
1324
1325         DEBUG(10,("schedule_deferred_open_message_smb2: "
1326                 "re-processing mid %llu\n",
1327                 (unsigned long long)mid ));
1328
1329         tevent_schedule_immediate(state->im,
1330                         smb2req->sconn->ev_ctx,
1331                         smbd_smb2_create_request_dispatch_immediate,
1332                         smb2req);
1333
1334         return true;
1335 }
1336
1337 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1338 {
1339         struct smbd_smb2_request *smb2req = NULL;
1340         struct smbd_smb2_create_state *state = tevent_req_data(req,
1341                                 struct smbd_smb2_create_state);
1342         uint64_t mid;
1343
1344         if (!state) {
1345                 return false;
1346         }
1347
1348         if (!state->smb2req) {
1349                 return false;
1350         }
1351
1352         smb2req = state->smb2req;
1353         mid = get_mid_from_smb2req(smb2req);
1354
1355         if (is_deferred_open_async(state->private_data.data)) {
1356                 /* Can't cancel an async create. */
1357                 return false;
1358         }
1359
1360         remove_deferred_open_message_smb2_internal(smb2req, mid);
1361
1362         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1363         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1364         return true;
1365 }
1366
1367 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1368                                 struct timeval request_time,
1369                                 struct timeval timeout,
1370                                 struct file_id id,
1371                                 char *private_data,
1372                                 size_t priv_len)
1373 {
1374         struct tevent_req *req = NULL;
1375         struct smbd_smb2_create_state *state = NULL;
1376         struct timeval end_time;
1377
1378         if (!smb2req) {
1379                 return false;
1380         }
1381         req = smb2req->subreq;
1382         if (!req) {
1383                 return false;
1384         }
1385         state = tevent_req_data(req, struct smbd_smb2_create_state);
1386         if (!state) {
1387                 return false;
1388         }
1389         state->id = id;
1390         state->request_time = request_time;
1391         state->private_data = data_blob_talloc(state, private_data,
1392                                                 priv_len);
1393         if (!state->private_data.data) {
1394                 return false;
1395         }
1396
1397         /* Re-schedule us to retry on timer expiry. */
1398         end_time = timeval_sum(&request_time, &timeout);
1399
1400         DEBUG(10,("push_deferred_open_message_smb2: "
1401                 "timeout at %s\n",
1402                 timeval_string(talloc_tos(),
1403                                 &end_time,
1404                                 true) ));
1405
1406         state->open_was_deferred = true;
1407
1408         /* allow this request to be canceled */
1409         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1410
1411         return true;
1412 }