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 = data_blob_talloc(smb2req->out.vector, NULL, 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 timespec write_time_ts;
 415         struct smb2_create_blobs out_context_blobs;
 416         int requested_oplock_level;
 417         struct smb2_create_blob *dhnc = NULL;
 418         struct smb2_create_blob *dh2c = NULL;
 419         struct smb2_create_blob *dhnq = NULL;
 420         struct smb2_create_blob *dh2q = NULL;
 421         struct smbXsrv_open *op = NULL;
 422
 423         ZERO_STRUCT(out_context_blobs);
 424
 425         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 426                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 427         } else {
 428                 requested_oplock_level = in_oplock_level;
 429         }
 430
 431
 432         if (smb2req->subreq == NULL) {
 433                 /* New create call. */
 434                 req = tevent_req_create(mem_ctx, &state,
 435                                 struct smbd_smb2_create_state);
 436                 if (req == NULL) {
 437                         return NULL;
 438                 }
 439                 state->smb2req = smb2req;
 440
 441                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 442                 if (tevent_req_nomem(smb1req, req)) {
 443                         return tevent_req_post(req, ev);
 444                 }
 445                 state->smb1req = smb1req;
 446                 smb2req->subreq = req;
 447                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 448                         in_name));
 449         } else {
 450                 /* Re-entrant create call. */
 451                 req = smb2req->subreq;
 452                 state = tevent_req_data(req,
 453                                 struct smbd_smb2_create_state);
 454                 smb1req = state->smb1req;
 455                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 456                         in_name ));
 457         }
 458
 459         dhnq = smb2_create_blob_find(&in_context_blobs,
 460                                      SMB2_CREATE_TAG_DHNQ);
 461         dhnc = smb2_create_blob_find(&in_context_blobs,
 462                                      SMB2_CREATE_TAG_DHNC);
 463         dh2q = smb2_create_blob_find(&in_context_blobs,
 464                                      SMB2_CREATE_TAG_DH2Q);
 465         dh2c = smb2_create_blob_find(&in_context_blobs,
 466                                      SMB2_CREATE_TAG_DH2C);
 467
 468         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 469             (dh2q && dh2c))
 470         {
 471                 /* not both are allowed at the same time */
 472                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 473                 return tevent_req_post(req, ev);
 474         }
 475
 476         if (dhnc) {
 477                 uint32_t num_blobs_allowed;
 478
 479                 if (dhnc->data.length != 16) {
 480                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 481                         return tevent_req_post(req, ev);
 482                 }
 483
 484                 /*
 485                  * According to MS-SMB2: 3.3.5.9.7, "Handling the
 486                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
 487                  * we should ignore an additional dhnq blob, but fail
 488                  * the request (with status OBJECT_NAME_NOT_FOUND) if
 489                  * any other extra create blob has been provided.
 490                  *
 491                  * (Note that the cases of an additional dh2q or dh2c blob
 492                  *  which require a different error code, have been treated
 493                  *  above.)
 494                  *
 495                  * TODO:
 496                  * This is only true for the oplock case:
 497                  * For leases, lease request is required additionally.
 498                  */
 499
 500                 if (dhnq) {
 501                         num_blobs_allowed = 2;
 502                 } else {
 503                         num_blobs_allowed = 1;
 504                 }
 505
 506                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 507                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 508                         return tevent_req_post(req, ev);
 509                 }
 510         }
 511
 512         if (dh2c) {
 513                 uint32_t num_blobs_allowed;
 514
 515                 if (dh2c->data.length != 36) {
 516                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 517                         return tevent_req_post(req, ev);
 518                 }
 519
 520                 /*
 521                  * According to MS-SMB2: 3.3.5.9.12, "Handling the
 522                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
 523                  * we should fail the request with status
 524                  * OBJECT_NAME_NOT_FOUND if any other create blob has been
 525                  * provided.
 526                  *
 527                  * (Note that the cases of an additional dhnq, dhnc or dh2q
 528                  *  blob which require a different error code, have been
 529                  *  treated above.)
 530                  *
 531                  * TODO:
 532                  * This is only true for the oplock case:
 533                  * For leases, lease request is required additionally!
 534                  */
 535
 536                 num_blobs_allowed = 1;
 537
 538                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 539                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 540                         return tevent_req_post(req, ev);
 541                 }
 542         }
 543
 544         if (IS_IPC(smb1req->conn)) {
 545                 const char *pipe_name = in_name;
 546
 547                 if (dhnc || dh2c) {
 548                         /* durable handles are not supported on IPC$ */
 549                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 550                         return tevent_req_post(req, ev);
 551                 }
 552
 553                 if (!lp_nt_pipe_support()) {
 554                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 555                         return tevent_req_post(req, ev);
 556                 }
 557
 558                 status = open_np_file(smb1req, pipe_name, &result);
 559                 if (!NT_STATUS_IS_OK(status)) {
 560                         tevent_req_nterror(req, status);
 561                         return tevent_req_post(req, ev);
 562                 }
 563                 info = FILE_WAS_OPENED;
 564         } else if (CAN_PRINT(smb1req->conn)) {
 565                 if (dhnc || dh2c) {
 566                         /* durable handles are not supported on printers */
 567                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 568                         return tevent_req_post(req, ev);
 569                 }
 570
 571                 status = file_new(smb1req, smb1req->conn, &result);
 572                 if(!NT_STATUS_IS_OK(status)) {
 573                         tevent_req_nterror(req, status);
 574                         return tevent_req_post(req, ev);
 575                 }
 576
 577                 status = print_spool_open(result, in_name,
 578                                           smb1req->vuid);
 579                 if (!NT_STATUS_IS_OK(status)) {
 580                         file_free(smb1req, result);
 581                         tevent_req_nterror(req, status);
 582                         return tevent_req_post(req, ev);
 583                 }
 584                 info = FILE_WAS_CREATED;
 585         } else {
 586                 char *fname;
 587                 struct smb2_create_blob *exta = NULL;
 588                 struct ea_list *ea_list = NULL;
 589                 struct smb2_create_blob *mxac = NULL;
 590                 NTTIME max_access_time = 0;
 591                 struct smb2_create_blob *secd = NULL;
 592                 struct security_descriptor *sec_desc = NULL;
 593                 struct smb2_create_blob *alsi = NULL;
 594                 uint64_t allocation_size = 0;
 595                 struct smb2_create_blob *twrp = NULL;
 596                 struct smb2_create_blob *qfid = NULL;
 597                 struct GUID _create_guid = GUID_zero();
 598                 struct GUID *create_guid = NULL;
 599                 bool update_open = false;
 600                 bool durable_requested = false;
 601                 uint32_t durable_timeout_msec = 0;
 602                 bool do_durable_reconnect = false;
 603                 uint64_t persistent_id = 0;
 604
 605                 exta = smb2_create_blob_find(&in_context_blobs,
 606                                              SMB2_CREATE_TAG_EXTA);
 607                 mxac = smb2_create_blob_find(&in_context_blobs,
 608                                              SMB2_CREATE_TAG_MXAC);
 609                 secd = smb2_create_blob_find(&in_context_blobs,
 610                                              SMB2_CREATE_TAG_SECD);
 611                 alsi = smb2_create_blob_find(&in_context_blobs,
 612                                              SMB2_CREATE_TAG_ALSI);
 613                 twrp = smb2_create_blob_find(&in_context_blobs,
 614                                              SMB2_CREATE_TAG_TWRP);
 615                 qfid = smb2_create_blob_find(&in_context_blobs,
 616                                              SMB2_CREATE_TAG_QFID);
 617
 618                 fname = talloc_strdup(state, in_name);
 619                 if (tevent_req_nomem(fname, req)) {
 620                         return tevent_req_post(req, ev);
 621                 }
 622
 623                 if (exta) {
 624                         ea_list = read_nttrans_ea_list(mem_ctx,
 625                                 (const char *)exta->data.data, exta->data.length);
 626                         if (!ea_list) {
 627                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 628                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 629                                 return tevent_req_post(req, ev);
 630                         }
 631
 632                         if (ea_list_has_invalid_name(ea_list)) {
 633                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 634                                 return tevent_req_post(req, ev);
 635                         }
 636                 }
 637
 638                 if (mxac) {
 639                         if (mxac->data.length == 0) {
 640                                 max_access_time = 0;
 641                         } else if (mxac->data.length == 8) {
 642                                 max_access_time = BVAL(mxac->data.data, 0);
 643                         } else {
 644                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 645                                 return tevent_req_post(req, ev);
 646                         }
 647                 }
 648
 649                 if (secd) {
 650                         enum ndr_err_code ndr_err;
 651
 652                         sec_desc = talloc_zero(state, struct security_descriptor);
 653                         if (tevent_req_nomem(sec_desc, req)) {
 654                                 return tevent_req_post(req, ev);
 655                         }
 656
 657                         ndr_err = ndr_pull_struct_blob(&secd->data,
 658                                 sec_desc, sec_desc,
 659                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 660                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 661                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 662                                          ndr_errstr(ndr_err)));
 663                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 664                                 return tevent_req_post(req, ev);
 665                         }
 666                 }
 667
 668                 if (dhnq) {
 669                         if (dhnq->data.length != 16) {
 670                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 671                                 return tevent_req_post(req, ev);
 672                         }
 673
 674                         if (dh2q) {
 675                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 676                                 return tevent_req_post(req, ev);
 677                         }
 678
 679                         /*
 680                          * durable handle request is processed below.
 681                          */
 682                         durable_requested = true;
 683                         /*
 684                          * Set the timeout to 16 mins.
 685                          *
 686                          * TODO: test this against Windows 2012
 687                          *       as the default for durable v2 is 1 min.
 688                          */
 689                         durable_timeout_msec = (16*60*1000);
 690                 }
 691
 692                 if (dh2q) {
 693                         const uint8_t *p = dh2q->data.data;
 694                         uint32_t durable_v2_timeout = 0;
 695                         DATA_BLOB create_guid_blob;
 696
 697                         if (dh2q->data.length != 32) {
 698                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 699                                 return tevent_req_post(req, ev);
 700                         }
 701
 702                         if (dhnq) {
 703                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 704                                 return tevent_req_post(req, ev);
 705                         }
 706
 707                         durable_v2_timeout = IVAL(p, 0);
 708                         create_guid_blob = data_blob_const(p + 16, 16);
 709
 710                         status = GUID_from_ndr_blob(&create_guid_blob,
 711                                                     &_create_guid);
 712                         if (tevent_req_nterror(req, status)) {
 713                                 return tevent_req_post(req, ev);
 714                         }
 715                         create_guid = &_create_guid;
 716                         /*
 717                          * we need to store the create_guid later
 718                          */
 719                         update_open = true;
 720
 721                         /*
 722                          * durable handle v2 request processed below
 723                          */
 724                         durable_requested = true;
 725                         durable_timeout_msec = durable_v2_timeout;
 726                         if (durable_timeout_msec == 0) {
 727                                 /*
 728                                  * Set the timeout to 1 min as default.
 729                                  *
 730                                  * This matches Windows 2012.
 731                                  */
 732                                 durable_timeout_msec = (60*1000);
 733                         }
 734                 }
 735
 736                 if (dhnc) {
 737                         persistent_id = BVAL(dhnc->data.data, 0);
 738
 739                         do_durable_reconnect = true;
 740                 }
 741
 742                 if (dh2c) {
 743                         const uint8_t *p = dh2c->data.data;
 744                         DATA_BLOB create_guid_blob;
 745
 746                         persistent_id = BVAL(p, 0);
 747                         create_guid_blob = data_blob_const(p + 16, 16);
 748
 749                         status = GUID_from_ndr_blob(&create_guid_blob,
 750                                                     &_create_guid);
 751                         if (tevent_req_nterror(req, status)) {
 752                                 return tevent_req_post(req, ev);
 753                         }
 754                         create_guid = &_create_guid;
 755
 756                         do_durable_reconnect = true;
 757                 }
 758
 759                 if (alsi) {
 760                         if (alsi->data.length != 8) {
 761                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 762                                 return tevent_req_post(req, ev);
 763                         }
 764                         allocation_size = BVAL(alsi->data.data, 0);
 765                 }
 766
 767                 if (twrp) {
 768                         NTTIME nttime;
 769                         time_t t;
 770                         struct tm *tm;
 771
 772                         if (twrp->data.length != 8) {
 773                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 774                                 return tevent_req_post(req, ev);
 775                         }
 776
 777                         nttime = BVAL(twrp->data.data, 0);
 778                         t = nt_time_to_unix(nttime);
 779                         tm = gmtime(&t);
 780
 781                         TALLOC_FREE(fname);
 782                         fname = talloc_asprintf(state,
 783                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 784                                         tm->tm_year + 1900,
 785                                         tm->tm_mon + 1,
 786                                         tm->tm_mday,
 787                                         tm->tm_hour,
 788                                         tm->tm_min,
 789                                         tm->tm_sec,
 790                                         in_name);
 791                         if (tevent_req_nomem(fname, req)) {
 792                                 return tevent_req_post(req, ev);
 793                         }
 794                 }
 795
 796                 if (qfid) {
 797                         if (qfid->data.length != 0) {
 798                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 799                                 return tevent_req_post(req, ev);
 800                         }
 801                 }
 802
 803                 /* these are ignored for SMB2 */
 804                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 805                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 806
 807                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 808
 809                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 810
 811                 /*
 812                  * For the backend file open procedure, there are
 813                  * two possible modes: durable_reconnect or not.
 814                  */
 815                 if (do_durable_reconnect) {
 816                         DATA_BLOB new_cookie = data_blob_null;
 817                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 818
 819                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 820                                                 smb1req->conn->session_info,
 821                                                 persistent_id, create_guid,
 822                                                 now, &op);
 823                         if (!NT_STATUS_IS_OK(status)) {
 824                                 DEBUG(3, ("smbd_smb2_create_send: "
 825                                           "smb2srv_open_recreate failed: %s\n",
 826                                           nt_errstr(status)));
 827                                 tevent_req_nterror(req, status);
 828                                 return tevent_req_post(req, ev);
 829                         }
 830
 831                         DEBUG(10, ("smb2_create_send: %s to recreate the "
 832                                    "smb2srv_open struct for a durable handle.\n",
 833                                    op->global->durable ? "succeded" : "failed"));
 834
 835                         if (!op->global->durable) {
 836                                 talloc_free(op);
 837                                 tevent_req_nterror(req,
 838                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 839                                 return tevent_req_post(req, ev);
 840                         }
 841
 842                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 843                                                 smb1req,
 844                                                 op, /* smbXsrv_open input */
 845                                                 op->global->backend_cookie,
 846                                                 op, /* TALLOC_CTX */
 847                                                 &result, &new_cookie);
 848                         if (!NT_STATUS_IS_OK(status)) {
 849                                 NTSTATUS return_status;
 850
 851                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 852
 853                                 DEBUG(3, ("smbd_smb2_create_send: "
 854                                           "durable_reconnect failed: %s => %s\n",
 855                                           nt_errstr(status),
 856                                           nt_errstr(return_status)));
 857
 858                                 tevent_req_nterror(req, return_status);
 859                                 return tevent_req_post(req, ev);
 860                         }
 861
 862                         data_blob_free(&op->global->backend_cookie);
 863                         op->global->backend_cookie = new_cookie;
 864
 865                         op->status = NT_STATUS_OK;
 866                         op->global->disconnect_time = 0;
 867
 868                         /* save the timout for later update */
 869                         durable_timeout_msec = op->global->durable_timeout_msec;
 870
 871                         update_open = true;
 872
 873                         info = FILE_WAS_OPENED;
 874                 } else {
 875                         struct smb_filename *smb_fname = NULL;
 876
 877                         /*
 878                          * For a DFS path the function parse_dfs_path()
 879                          * will do the path processing.
 880                          */
 881
 882                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 883                                 /* convert '\\' into '/' */
 884                                 status = check_path_syntax(fname);
 885                                 if (!NT_STATUS_IS_OK(status)) {
 886                                         tevent_req_nterror(req, status);
 887                                         return tevent_req_post(req, ev);
 888                                 }
 889                         }
 890
 891                         status = filename_convert(req,
 892                                                   smb1req->conn,
 893                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 894                                                   fname,
 895                                                   (in_create_disposition == FILE_CREATE) ?
 896                                                   UCF_CREATING_FILE : 0,
 897                                                   NULL, /* ppath_contains_wcards */
 898                                                   &smb_fname);
 899                         if (!NT_STATUS_IS_OK(status)) {
 900                                 tevent_req_nterror(req, status);
 901                                 return tevent_req_post(req, ev);
 902                         }
 903
 904                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 905                                                      smb1req,
 906                                                      0, /* root_dir_fid */
 907                                                      smb_fname,
 908                                                      in_desired_access,
 909                                                      in_share_access,
 910                                                      in_create_disposition,
 911                                                      in_create_options,
 912                                                      in_file_attributes,
 913                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 914                                                      allocation_size,
 915                                                      0, /* private_flags */
 916                                                      sec_desc,
 917                                                      ea_list,
 918                                                      &result,
 919                                                      &info);
 920                         if (!NT_STATUS_IS_OK(status)) {
 921                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 922                                         return req;
 923                                 }
 924                                 tevent_req_nterror(req, status);
 925                                 return tevent_req_post(req, ev);
 926                         }
 927                         op = result->op;
 928                 }
 929
 930                 /*
 931                  * here we have op == result->op
 932                  */
 933
 934                 DEBUG(10, ("smbd_smb2_create_send: "
 935                            "response construction phase\n"));
 936
 937                 if (mxac) {
 938                         NTTIME last_write_time;
 939
 940                         unix_timespec_to_nt_time(&last_write_time,
 941                                                  result->fsp_name->st.st_ex_mtime);
 942                         if (last_write_time != max_access_time) {
 943                                 uint8_t p[8];
 944                                 uint32_t max_access_granted;
 945                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 946
 947                                 status = smbd_calculate_access_mask(smb1req->conn,
 948                                                         result->fsp_name,
 949                                                         false,
 950                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 951                                                         &max_access_granted);
 952
 953                                 SIVAL(p, 0, NT_STATUS_V(status));
 954                                 SIVAL(p, 4, max_access_granted);
 955
 956                                 status = smb2_create_blob_add(state,
 957                                                         &out_context_blobs,
 958                                                         SMB2_CREATE_TAG_MXAC,
 959                                                         blob);
 960                                 if (!NT_STATUS_IS_OK(status)) {
 961                                         tevent_req_nterror(req, status);
 962                                         return tevent_req_post(req, ev);
 963                                 }
 964                         }
 965                 }
 966
 967                 if (durable_requested &&
 968                     BATCH_OPLOCK_TYPE(result->oplock_type))
 969                 {
 970                         status = SMB_VFS_DURABLE_COOKIE(result,
 971                                                 op,
 972                                                 &op->global->backend_cookie);
 973                         if (!NT_STATUS_IS_OK(status)) {
 974                                 op->global->backend_cookie = data_blob_null;
 975                         }
 976                 }
 977                 if (op->global->backend_cookie.length > 0) {
 978                         update_open = true;
 979
 980                         op->global->durable = true;
 981                         op->global->durable_timeout_msec = durable_timeout_msec;
 982                 }
 983
 984                 if (update_open) {
 985                         op->global->create_guid = _create_guid;
 986
 987                         status = smbXsrv_open_update(op);
 988                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 989                                    "returned %s\n",
 990                                    nt_errstr(status)));
 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 (dhnq && op->global->durable) {
 998                         uint8_t p[8] = { 0, };
 999                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1000
1001                         status = smb2_create_blob_add(state,
1002                                                       &out_context_blobs,
1003                                                       SMB2_CREATE_TAG_DHNQ,
1004                                                       blob);
1005                         if (!NT_STATUS_IS_OK(status)) {
1006                                 tevent_req_nterror(req, status);
1007                                 return tevent_req_post(req, ev);
1008                         }
1009                 }
1010
1011                 if (dh2q && op->global->durable) {
1012                         uint8_t p[8] = { 0, };
1013                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1014                         uint32_t durable_v2_response_flags = 0;
1015
1016                         SIVAL(p, 0, op->global->durable_timeout_msec);
1017                         SIVAL(p, 4, durable_v2_response_flags);
1018
1019                         status = smb2_create_blob_add(state, &out_context_blobs,
1020                                                       SMB2_CREATE_TAG_DH2Q,
1021                                                       blob);
1022                         if (!NT_STATUS_IS_OK(status)) {
1023                                 tevent_req_nterror(req, status);
1024                                 return tevent_req_post(req, ev);
1025                         }
1026                 }
1027
1028                 if (qfid) {
1029                         uint8_t p[32];
1030                         uint64_t file_index = get_FileIndex(result->conn,
1031                                                         &result->fsp_name->st);
1032                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1033
1034                         ZERO_STRUCT(p);
1035
1036                         /* From conversations with Microsoft engineers at
1037                            the MS plugfest. The first 8 bytes are the "volume index"
1038                            == inode, the second 8 bytes are the "volume id",
1039                            == dev. This will be updated in the SMB2 doc. */
1040                         SBVAL(p, 0, file_index);
1041                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1042
1043                         status = smb2_create_blob_add(state, &out_context_blobs,
1044                                                       SMB2_CREATE_TAG_QFID,
1045                                                       blob);
1046                         if (!NT_STATUS_IS_OK(status)) {
1047                                 tevent_req_nterror(req, status);
1048                                 return tevent_req_post(req, ev);
1049                         }
1050                 }
1051         }
1052
1053         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1054
1055         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1056                 state->out_oplock_level = in_oplock_level;
1057         } else {
1058                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1059         }
1060
1061         if ((in_create_disposition == FILE_SUPERSEDE)
1062             && (info == FILE_WAS_OVERWRITTEN)) {
1063                 state->out_create_action = FILE_WAS_SUPERSEDED;
1064         } else {
1065                 state->out_create_action = info;
1066         }
1067         state->out_file_attributes = dos_mode(result->conn,
1068                                            result->fsp_name);
1069         /* Deal with other possible opens having a modified
1070            write time. JRA. */
1071         ZERO_STRUCT(write_time_ts);
1072         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1073         if (!null_timespec(write_time_ts)) {
1074                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1075         }
1076
1077         unix_timespec_to_nt_time(&state->out_creation_time,
1078                         get_create_timespec(smb1req->conn, result,
1079                                         result->fsp_name));
1080         unix_timespec_to_nt_time(&state->out_last_access_time,
1081                         result->fsp_name->st.st_ex_atime);
1082         unix_timespec_to_nt_time(&state->out_last_write_time,
1083                         result->fsp_name->st.st_ex_mtime);
1084         unix_timespec_to_nt_time(&state->out_change_time,
1085                         get_change_timespec(smb1req->conn, result,
1086                                         result->fsp_name));
1087         state->out_allocation_size =
1088                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1089                                                &(result->fsp_name->st));
1090         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1091         if (state->out_file_attributes == 0) {
1092                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1093         }
1094         state->out_file_id_persistent = result->op->global->open_persistent_id;
1095         state->out_file_id_volatile = result->op->global->open_volatile_id;
1096         state->out_context_blobs = out_context_blobs;
1097
1098         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1099                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1100
1101         tevent_req_done(req);
1102         return tevent_req_post(req, ev);
1103 }
1104
1105 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1106                         TALLOC_CTX *mem_ctx,
1107                         uint8_t *out_oplock_level,
1108                         uint32_t *out_create_action,
1109                         NTTIME *out_creation_time,
1110                         NTTIME *out_last_access_time,
1111                         NTTIME *out_last_write_time,
1112                         NTTIME *out_change_time,
1113                         uint64_t *out_allocation_size,
1114                         uint64_t *out_end_of_file,
1115                         uint32_t *out_file_attributes,
1116                         uint64_t *out_file_id_persistent,
1117                         uint64_t *out_file_id_volatile,
1118                         struct smb2_create_blobs *out_context_blobs)
1119 {
1120         NTSTATUS status;
1121         struct smbd_smb2_create_state *state = tevent_req_data(req,
1122                                                struct smbd_smb2_create_state);
1123
1124         if (tevent_req_is_nterror(req, &status)) {
1125                 tevent_req_received(req);
1126                 return status;
1127         }
1128
1129         *out_oplock_level       = state->out_oplock_level;
1130         *out_create_action      = state->out_create_action;
1131         *out_creation_time      = state->out_creation_time;
1132         *out_last_access_time   = state->out_last_access_time;
1133         *out_last_write_time    = state->out_last_write_time;
1134         *out_change_time        = state->out_change_time;
1135         *out_allocation_size    = state->out_allocation_size;
1136         *out_end_of_file        = state->out_end_of_file;
1137         *out_file_attributes    = state->out_file_attributes;
1138         *out_file_id_persistent = state->out_file_id_persistent;
1139         *out_file_id_volatile   = state->out_file_id_volatile;
1140         *out_context_blobs      = state->out_context_blobs;
1141
1142         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1143
1144         tevent_req_received(req);
1145         return NT_STATUS_OK;
1146 }
1147
1148 /*********************************************************
1149  Code for dealing with deferred opens.
1150 *********************************************************/
1151
1152 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1153                         struct timeval *p_request_time,
1154                         void **pp_state)
1155 {
1156         struct smbd_smb2_create_state *state = NULL;
1157         struct tevent_req *req = NULL;
1158
1159         if (!smb2req) {
1160                 return false;
1161         }
1162         req = smb2req->subreq;
1163         if (!req) {
1164                 return false;
1165         }
1166         state = tevent_req_data(req, struct smbd_smb2_create_state);
1167         if (!state) {
1168                 return false;
1169         }
1170         if (!state->open_was_deferred) {
1171                 return false;
1172         }
1173         if (p_request_time) {
1174                 *p_request_time = state->request_time;
1175         }
1176         if (pp_state) {
1177                 *pp_state = (void *)state->private_data.data;
1178         }
1179         return true;
1180 }
1181
1182 /*********************************************************
1183  Re-process this call early - requested by message or
1184  close.
1185 *********************************************************/
1186
1187 static struct smbd_smb2_request *find_open_smb2req(
1188         struct smbd_server_connection *sconn, uint64_t mid)
1189 {
1190         struct smbd_smb2_request *smb2req;
1191
1192         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1193                 uint64_t message_id;
1194                 if (smb2req->subreq == NULL) {
1195                         /* This message has been processed. */
1196                         continue;
1197                 }
1198                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1199                         /* This message has been processed. */
1200                         continue;
1201                 }
1202                 message_id = get_mid_from_smb2req(smb2req);
1203                 if (message_id == mid) {
1204                         return smb2req;
1205                 }
1206         }
1207         return NULL;
1208 }
1209
1210 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1211 {
1212         struct smbd_smb2_create_state *state = NULL;
1213         struct smbd_smb2_request *smb2req;
1214
1215         smb2req = find_open_smb2req(sconn, mid);
1216
1217         if (!smb2req) {
1218                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1219                         (unsigned long long)mid));
1220                 return false;
1221         }
1222         if (!smb2req->subreq) {
1223                 return false;
1224         }
1225         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1226                 return false;
1227         }
1228         state = tevent_req_data(smb2req->subreq,
1229                         struct smbd_smb2_create_state);
1230         if (!state) {
1231                 return false;
1232         }
1233         /* It's not in progress if there's no timeout event. */
1234         if (!state->open_was_deferred) {
1235                 return false;
1236         }
1237
1238         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1239                         (unsigned long long)mid));
1240
1241         return true;
1242 }
1243
1244 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1245                                                         uint64_t mid)
1246 {
1247         struct smbd_smb2_create_state *state = NULL;
1248
1249         if (!smb2req->subreq) {
1250                 return;
1251         }
1252         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1253                 return;
1254         }
1255         state = tevent_req_data(smb2req->subreq,
1256                         struct smbd_smb2_create_state);
1257         if (!state) {
1258                 return;
1259         }
1260
1261         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1262                 "mid %llu\n",
1263                 (unsigned long long)mid ));
1264
1265         state->open_was_deferred = false;
1266         /* Ensure we don't have any outstanding timer event. */
1267         TALLOC_FREE(state->te);
1268         /* Ensure we don't have any outstanding immediate event. */
1269         TALLOC_FREE(state->im);
1270 }
1271
1272 void remove_deferred_open_message_smb2(
1273         struct smbd_server_connection *sconn, uint64_t mid)
1274 {
1275         struct smbd_smb2_request *smb2req;
1276
1277         smb2req = find_open_smb2req(sconn, mid);
1278
1279         if (!smb2req) {
1280                 DEBUG(10,("remove_deferred_open_message_smb2: "
1281                         "can't find mid %llu\n",
1282                         (unsigned long long)mid ));
1283                 return;
1284         }
1285         remove_deferred_open_message_smb2_internal(smb2req, mid);
1286 }
1287
1288 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1289                                         struct tevent_immediate *im,
1290                                         void *private_data)
1291 {
1292         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1293                                         struct smbd_smb2_request);
1294         struct smbd_server_connection *sconn = smb2req->sconn;
1295         uint64_t mid = get_mid_from_smb2req(smb2req);
1296         NTSTATUS status;
1297
1298         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1299                 "re-dispatching mid %llu\n",
1300                 (unsigned long long)mid ));
1301
1302         status = smbd_smb2_request_dispatch(smb2req);
1303         if (!NT_STATUS_IS_OK(status)) {
1304                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1305                 return;
1306         }
1307 }
1308
1309 bool schedule_deferred_open_message_smb2(
1310         struct smbd_server_connection *sconn, uint64_t mid)
1311 {
1312         struct smbd_smb2_create_state *state = NULL;
1313         struct smbd_smb2_request *smb2req;
1314
1315         smb2req = find_open_smb2req(sconn, mid);
1316
1317         if (!smb2req) {
1318                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1319                         "can't find mid %llu\n",
1320                         (unsigned long long)mid ));
1321                 return false;
1322         }
1323         if (!smb2req->subreq) {
1324                 return false;
1325         }
1326         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1327                 return false;
1328         }
1329         state = tevent_req_data(smb2req->subreq,
1330                         struct smbd_smb2_create_state);
1331         if (!state) {
1332                 return false;
1333         }
1334
1335         /* Ensure we don't have any outstanding timer event. */
1336         TALLOC_FREE(state->te);
1337         /* Ensure we don't have any outstanding immediate event. */
1338         TALLOC_FREE(state->im);
1339
1340         /*
1341          * This is subtle. We must null out the callback
1342          * before rescheduling, else the first call to
1343          * tevent_req_nterror() causes the _receive()
1344          * function to be called, this causing tevent_req_post()
1345          * to crash.
1346          */
1347         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1348
1349         state->im = tevent_create_immediate(smb2req);
1350         if (!state->im) {
1351                 smbd_server_connection_terminate(smb2req->sconn,
1352                         nt_errstr(NT_STATUS_NO_MEMORY));
1353                 return false;
1354         }
1355
1356         DEBUG(10,("schedule_deferred_open_message_smb2: "
1357                 "re-processing mid %llu\n",
1358                 (unsigned long long)mid ));
1359
1360         tevent_schedule_immediate(state->im,
1361                         smb2req->sconn->ev_ctx,
1362                         smbd_smb2_create_request_dispatch_immediate,
1363                         smb2req);
1364
1365         return true;
1366 }
1367
1368 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1369 {
1370         struct smbd_smb2_request *smb2req = NULL;
1371         struct smbd_smb2_create_state *state = tevent_req_data(req,
1372                                 struct smbd_smb2_create_state);
1373         uint64_t mid;
1374
1375         if (!state) {
1376                 return false;
1377         }
1378
1379         if (!state->smb2req) {
1380                 return false;
1381         }
1382
1383         smb2req = state->smb2req;
1384         mid = get_mid_from_smb2req(smb2req);
1385
1386         if (is_deferred_open_async(state->private_data.data)) {
1387                 /* Can't cancel an async create. */
1388                 return false;
1389         }
1390
1391         remove_deferred_open_message_smb2_internal(smb2req, mid);
1392
1393         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1394         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1395         return true;
1396 }
1397
1398 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1399                                 struct timeval request_time,
1400                                 struct timeval timeout,
1401                                 struct file_id id,
1402                                 char *private_data,
1403                                 size_t priv_len)
1404 {
1405         struct tevent_req *req = NULL;
1406         struct smbd_smb2_create_state *state = NULL;
1407         struct timeval end_time;
1408
1409         if (!smb2req) {
1410                 return false;
1411         }
1412         req = smb2req->subreq;
1413         if (!req) {
1414                 return false;
1415         }
1416         state = tevent_req_data(req, struct smbd_smb2_create_state);
1417         if (!state) {
1418                 return false;
1419         }
1420         state->id = id;
1421         state->request_time = request_time;
1422         state->private_data = data_blob_talloc(state, private_data,
1423                                                 priv_len);
1424         if (!state->private_data.data) {
1425                 return false;
1426         }
1427
1428         /* Re-schedule us to retry on timer expiry. */
1429         end_time = timeval_sum(&request_time, &timeout);
1430
1431         DEBUG(10,("push_deferred_open_message_smb2: "
1432                 "timeout at %s\n",
1433                 timeval_string(talloc_tos(),
1434                                 &end_time,
1435                                 true) ));
1436
1437         state->open_was_deferred = true;
1438
1439         /* allow this request to be canceled */
1440         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1441
1442         return true;
1443 }