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         int i = smb2req->current_idx;
 105         uint8_t in_oplock_level;
 106         uint32_t in_impersonation_level;
 107         uint32_t in_desired_access;
 108         uint32_t in_file_attributes;
 109         uint32_t in_share_access;
 110         uint32_t in_create_disposition;
 111         uint32_t in_create_options;
 112         uint16_t in_name_offset;
 113         uint16_t in_name_length;
 114         DATA_BLOB in_name_buffer;
 115         char *in_name_string;
 116         size_t in_name_string_size;
 117         uint32_t name_offset = 0;
 118         uint32_t name_available_length = 0;
 119         uint32_t in_context_offset;
 120         uint32_t in_context_length;
 121         DATA_BLOB in_context_buffer;
 122         struct smb2_create_blobs in_context_blobs;
 123         uint32_t context_offset = 0;
 124         uint32_t context_available_length = 0;
 125         uint32_t dyn_offset;
 126         NTSTATUS status;
 127         bool ok;
 128         struct tevent_req *tsubreq;
 129
 130         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 return smbd_smb2_request_error(smb2req, status);
 133         }
 134         inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
 135
 136         in_oplock_level         = CVAL(inbody, 0x03);
 137         in_impersonation_level  = IVAL(inbody, 0x04);
 138         in_desired_access       = IVAL(inbody, 0x18);
 139         in_file_attributes      = IVAL(inbody, 0x1C);
 140         in_share_access         = IVAL(inbody, 0x20);
 141         in_create_disposition   = IVAL(inbody, 0x24);
 142         in_create_options       = IVAL(inbody, 0x28);
 143         in_name_offset          = SVAL(inbody, 0x2C);
 144         in_name_length          = SVAL(inbody, 0x2E);
 145         in_context_offset       = IVAL(inbody, 0x30);
 146         in_context_length       = IVAL(inbody, 0x34);
 147
 148         /*
 149          * First check if the dynamic name and context buffers
 150          * are correctly specified.
 151          *
 152          * Note: That we don't check if the name and context buffers
 153          *       overlap
 154          */
 155
 156         dyn_offset = SMB2_HDR_BODY + smb2req->in.vector[i+1].iov_len;
 157
 158         if (in_name_offset == 0 && in_name_length == 0) {
 159                 /* This is ok */
 160                 name_offset = 0;
 161         } else if (in_name_offset < dyn_offset) {
 162                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 163         } else {
 164                 name_offset = in_name_offset - dyn_offset;
 165         }
 166
 167         indyniov = &smb2req->in.vector[i+2];
 168
 169         if (name_offset > indyniov->iov_len) {
 170                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 171         }
 172
 173         name_available_length = indyniov->iov_len - name_offset;
 174
 175         if (in_name_length > name_available_length) {
 176                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 177         }
 178
 179         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 180         in_name_buffer.length = in_name_length;
 181
 182         if (in_context_offset == 0 && in_context_length == 0) {
 183                 /* This is ok */
 184                 context_offset = 0;
 185         } else if (in_context_offset < dyn_offset) {
 186                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 187         } else {
 188                 context_offset = in_context_offset - dyn_offset;
 189         }
 190
 191         if (context_offset > indyniov->iov_len) {
 192                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 193         }
 194
 195         context_available_length = indyniov->iov_len - context_offset;
 196
 197         if (in_context_length > context_available_length) {
 198                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 199         }
 200
 201         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 202                 context_offset;
 203         in_context_buffer.length = in_context_length;
 204
 205         /*
 206          * Now interpret the name and context buffers
 207          */
 208
 209         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 210                                    in_name_buffer.data,
 211                                    in_name_buffer.length,
 212                                    &in_name_string,
 213                                    &in_name_string_size);
 214         if (!ok) {
 215                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 216         }
 217
 218         if (in_name_buffer.length == 0) {
 219                 in_name_string_size = 0;
 220         }
 221
 222         if (strlen(in_name_string) != in_name_string_size) {
 223                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 224         }
 225
 226         ZERO_STRUCT(in_context_blobs);
 227         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 228         if (!NT_STATUS_IS_OK(status)) {
 229                 return smbd_smb2_request_error(smb2req, status);
 230         }
 231
 232         tsubreq = smbd_smb2_create_send(smb2req,
 233                                        smb2req->sconn->ev_ctx,
 234                                        smb2req,
 235                                        in_oplock_level,
 236                                        in_impersonation_level,
 237                                        in_desired_access,
 238                                        in_file_attributes,
 239                                        in_share_access,
 240                                        in_create_disposition,
 241                                        in_create_options,
 242                                        in_name_string,
 243                                        in_context_blobs);
 244         if (tsubreq == NULL) {
 245                 smb2req->subreq = NULL;
 246                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 247         }
 248         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 249
 250         /*
 251          * For now we keep the logic that we do not send STATUS_PENDING
 252          * for sharing violations, so we just wait 2 seconds.
 253          *
 254          * TODO: we need more tests for this.
 255          */
 256         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 257 }
 258
 259 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 260 {
 261         uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
 262         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 263 }
 264
 265 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 266 {
 267         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 268                                         struct smbd_smb2_request);
 269         DATA_BLOB outbody;
 270         DATA_BLOB outdyn;
 271         uint8_t out_oplock_level = 0;
 272         uint32_t out_create_action = 0;
 273         NTTIME out_creation_time = 0;
 274         NTTIME out_last_access_time = 0;
 275         NTTIME out_last_write_time = 0;
 276         NTTIME out_change_time = 0;
 277         uint64_t out_allocation_size = 0;
 278         uint64_t out_end_of_file = 0;
 279         uint32_t out_file_attributes = 0;
 280         uint64_t out_file_id_persistent = 0;
 281         uint64_t out_file_id_volatile = 0;
 282         struct smb2_create_blobs out_context_blobs;
 283         DATA_BLOB out_context_buffer;
 284         uint16_t out_context_buffer_offset = 0;
 285         NTSTATUS status;
 286         NTSTATUS error; /* transport error */
 287
 288         if (smb2req->cancelled) {
 289                 uint64_t mid = get_mid_from_smb2req(smb2req);
 290                 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
 291                         (unsigned long long)mid ));
 292                 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
 293                 if (!NT_STATUS_IS_OK(error)) {
 294                         smbd_server_connection_terminate(smb2req->sconn,
 295                                 nt_errstr(error));
 296                         return;
 297                 }
 298                 return;
 299         }
 300
 301         status = smbd_smb2_create_recv(tsubreq,
 302                                        smb2req,
 303                                        &out_oplock_level,
 304                                        &out_create_action,
 305                                        &out_creation_time,
 306                                        &out_last_access_time,
 307                                        &out_last_write_time,
 308                                        &out_change_time,
 309                                        &out_allocation_size,
 310                                        &out_end_of_file,
 311                                        &out_file_attributes,
 312                                        &out_file_id_persistent,
 313                                        &out_file_id_volatile,
 314                                        &out_context_blobs);
 315         if (!NT_STATUS_IS_OK(status)) {
 316                 error = smbd_smb2_request_error(smb2req, status);
 317                 if (!NT_STATUS_IS_OK(error)) {
 318                         smbd_server_connection_terminate(smb2req->sconn,
 319                                                          nt_errstr(error));
 320                         return;
 321                 }
 322                 return;
 323         }
 324
 325         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 326         if (!NT_STATUS_IS_OK(status)) {
 327                 error = smbd_smb2_request_error(smb2req, status);
 328                 if (!NT_STATUS_IS_OK(error)) {
 329                         smbd_server_connection_terminate(smb2req->sconn,
 330                                                          nt_errstr(error));
 331                         return;
 332                 }
 333                 return;
 334         }
 335
 336         if (out_context_buffer.length > 0) {
 337                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 338         }
 339
 340         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 341         if (outbody.data == NULL) {
 342                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 343                 if (!NT_STATUS_IS_OK(error)) {
 344                         smbd_server_connection_terminate(smb2req->sconn,
 345                                                          nt_errstr(error));
 346                         return;
 347                 }
 348                 return;
 349         }
 350
 351         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 352         SCVAL(outbody.data, 0x02,
 353               out_oplock_level);                /* oplock level */
 354         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 355         SIVAL(outbody.data, 0x04,
 356               out_create_action);               /* create action */
 357         SBVAL(outbody.data, 0x08,
 358               out_creation_time);               /* creation time */
 359         SBVAL(outbody.data, 0x10,
 360               out_last_access_time);            /* last access time */
 361         SBVAL(outbody.data, 0x18,
 362               out_last_write_time);             /* last write time */
 363         SBVAL(outbody.data, 0x20,
 364               out_change_time);                 /* change time */
 365         SBVAL(outbody.data, 0x28,
 366               out_allocation_size);             /* allocation size */
 367         SBVAL(outbody.data, 0x30,
 368               out_end_of_file);                 /* end of file */
 369         SIVAL(outbody.data, 0x38,
 370               out_file_attributes);             /* file attributes */
 371         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 372         SBVAL(outbody.data, 0x40,
 373               out_file_id_persistent);          /* file id (persistent) */
 374         SBVAL(outbody.data, 0x48,
 375               out_file_id_volatile);            /* file id (volatile) */
 376         SIVAL(outbody.data, 0x50,
 377               out_context_buffer_offset);       /* create contexts offset */
 378         SIVAL(outbody.data, 0x54,
 379               out_context_buffer.length);       /* create contexts length */
 380
 381         outdyn = out_context_buffer;
 382
 383         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 384         if (!NT_STATUS_IS_OK(error)) {
 385                 smbd_server_connection_terminate(smb2req->sconn,
 386                                                  nt_errstr(error));
 387                 return;
 388         }
 389 }
 390
 391 struct smbd_smb2_create_state {
 392         struct smbd_smb2_request *smb2req;
 393         struct smb_request *smb1req;
 394         struct timed_event *te;
 395         struct tevent_immediate *im;
 396         struct timeval request_time;
 397         struct file_id id;
 398         DATA_BLOB private_data;
 399         uint8_t out_oplock_level;
 400         uint32_t out_create_action;
 401         NTTIME out_creation_time;
 402         NTTIME out_last_access_time;
 403         NTTIME out_last_write_time;
 404         NTTIME out_change_time;
 405         uint64_t out_allocation_size;
 406         uint64_t out_end_of_file;
 407         uint32_t out_file_attributes;
 408         uint64_t out_file_id_persistent;
 409         uint64_t out_file_id_volatile;
 410         struct smb2_create_blobs out_context_blobs;
 411 };
 412
 413 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 414                         struct tevent_context *ev,
 415                         struct smbd_smb2_request *smb2req,
 416                         uint8_t in_oplock_level,
 417                         uint32_t in_impersonation_level,
 418                         uint32_t in_desired_access,
 419                         uint32_t in_file_attributes,
 420                         uint32_t in_share_access,
 421                         uint32_t in_create_disposition,
 422                         uint32_t in_create_options,
 423                         const char *in_name,
 424                         struct smb2_create_blobs in_context_blobs)
 425 {
 426         struct tevent_req *req = NULL;
 427         struct smbd_smb2_create_state *state = NULL;
 428         NTSTATUS status;
 429         struct smb_request *smb1req = NULL;
 430         files_struct *result = NULL;
 431         int info;
 432         struct timespec write_time_ts;
 433         struct smb2_create_blobs out_context_blobs;
 434         int requested_oplock_level;
 435
 436         ZERO_STRUCT(out_context_blobs);
 437
 438         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
 439                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 440         } else {
 441                 requested_oplock_level = in_oplock_level;
 442         }
 443
 444
 445         if (smb2req->subreq == NULL) {
 446                 /* New create call. */
 447                 req = tevent_req_create(mem_ctx, &state,
 448                                 struct smbd_smb2_create_state);
 449                 if (req == NULL) {
 450                         return NULL;
 451                 }
 452                 state->smb2req = smb2req;
 453
 454                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 455                 if (tevent_req_nomem(smb1req, req)) {
 456                         return tevent_req_post(req, ev);
 457                 }
 458                 state->smb1req = smb1req;
 459                 smb2req->subreq = req;
 460                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 461                         in_name));
 462         } else {
 463                 /* Re-entrant create call. */
 464                 req = smb2req->subreq;
 465                 state = tevent_req_data(req,
 466                                 struct smbd_smb2_create_state);
 467                 smb1req = state->smb1req;
 468                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 469                         in_name ));
 470         }
 471
 472         if (IS_IPC(smb1req->conn)) {
 473                 const char *pipe_name = in_name;
 474
 475                 if (!lp_nt_pipe_support()) {
 476                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 477                         return tevent_req_post(req, ev);
 478                 }
 479
 480                 /* Strip \\ off the name. */
 481                 if (pipe_name[0] == '\\') {
 482                         pipe_name++;
 483                 }
 484
 485                 status = open_np_file(smb1req, pipe_name, &result);
 486                 if (!NT_STATUS_IS_OK(status)) {
 487                         tevent_req_nterror(req, status);
 488                         return tevent_req_post(req, ev);
 489                 }
 490                 info = FILE_WAS_OPENED;
 491         } else if (CAN_PRINT(smb1req->conn)) {
 492                 status = file_new(smb1req, smb1req->conn, &result);
 493                 if(!NT_STATUS_IS_OK(status)) {
 494                         tevent_req_nterror(req, status);
 495                         return tevent_req_post(req, ev);
 496                 }
 497
 498                 status = print_spool_open(result, in_name,
 499                                           smb1req->vuid);
 500                 if (!NT_STATUS_IS_OK(status)) {
 501                         file_free(smb1req, result);
 502                         tevent_req_nterror(req, status);
 503                         return tevent_req_post(req, ev);
 504                 }
 505                 info = FILE_WAS_CREATED;
 506         } else {
 507                 char *fname;
 508                 struct smb_filename *smb_fname = NULL;
 509                 struct smb2_create_blob *exta = NULL;
 510                 struct ea_list *ea_list = NULL;
 511                 struct smb2_create_blob *mxac = NULL;
 512                 NTTIME max_access_time = 0;
 513                 struct smb2_create_blob *secd = NULL;
 514                 struct security_descriptor *sec_desc = NULL;
 515                 struct smb2_create_blob *dhnq = NULL;
 516                 struct smb2_create_blob *dhnc = NULL;
 517                 struct smb2_create_blob *alsi = NULL;
 518                 uint64_t allocation_size = 0;
 519                 struct smb2_create_blob *twrp = NULL;
 520                 struct smb2_create_blob *qfid = NULL;
 521
 522                 exta = smb2_create_blob_find(&in_context_blobs,
 523                                              SMB2_CREATE_TAG_EXTA);
 524                 mxac = smb2_create_blob_find(&in_context_blobs,
 525                                              SMB2_CREATE_TAG_MXAC);
 526                 secd = smb2_create_blob_find(&in_context_blobs,
 527                                              SMB2_CREATE_TAG_SECD);
 528                 dhnq = smb2_create_blob_find(&in_context_blobs,
 529                                              SMB2_CREATE_TAG_DHNQ);
 530                 dhnc = smb2_create_blob_find(&in_context_blobs,
 531                                              SMB2_CREATE_TAG_DHNC);
 532                 alsi = smb2_create_blob_find(&in_context_blobs,
 533                                              SMB2_CREATE_TAG_ALSI);
 534                 twrp = smb2_create_blob_find(&in_context_blobs,
 535                                              SMB2_CREATE_TAG_TWRP);
 536                 qfid = smb2_create_blob_find(&in_context_blobs,
 537                                              SMB2_CREATE_TAG_QFID);
 538
 539                 fname = talloc_strdup(state, in_name);
 540                 if (tevent_req_nomem(fname, req)) {
 541                         return tevent_req_post(req, ev);
 542                 }
 543
 544                 if (exta) {
 545                         if (dhnc) {
 546                                 tevent_req_nterror(req,NT_STATUS_OBJECT_NAME_NOT_FOUND);
 547                                 return tevent_req_post(req, ev);
 548                         }
 549
 550                         ea_list = read_nttrans_ea_list(mem_ctx,
 551                                 (const char *)exta->data.data, exta->data.length);
 552                         if (!ea_list) {
 553                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 554                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 555                                 return tevent_req_post(req, ev);
 556                         }
 557                 }
 558
 559                 if (mxac) {
 560                         if (dhnc) {
 561                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 562                                 return tevent_req_post(req, ev);
 563                         }
 564
 565                         if (mxac->data.length == 0) {
 566                                 max_access_time = 0;
 567                         } else if (mxac->data.length == 8) {
 568                                 max_access_time = BVAL(mxac->data.data, 0);
 569                         } else {
 570                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 571                                 return tevent_req_post(req, ev);
 572                         }
 573                 }
 574
 575                 if (secd) {
 576                         enum ndr_err_code ndr_err;
 577
 578                         if (dhnc) {
 579                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 580                                 return tevent_req_post(req, ev);
 581                         }
 582
 583                         sec_desc = talloc_zero(state, struct security_descriptor);
 584                         if (tevent_req_nomem(sec_desc, req)) {
 585                                 return tevent_req_post(req, ev);
 586                         }
 587
 588                         ndr_err = ndr_pull_struct_blob(&secd->data,
 589                                 sec_desc, sec_desc,
 590                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 591                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 592                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 593                                          ndr_errstr(ndr_err)));
 594                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 595                                 return tevent_req_post(req, ev);
 596                         }
 597                 }
 598
 599                 if (dhnq) {
 600                         if (dhnc) {
 601                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 602                                 return tevent_req_post(req, ev);
 603                         }
 604
 605                         if (dhnq->data.length != 16) {
 606                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 607                                 return tevent_req_post(req, ev);
 608                         }
 609                         /*
 610                          * we don't support durable handles yet
 611                          * and have to ignore this
 612                          */
 613                 }
 614
 615                 if (dhnc) {
 616                         if (dhnc->data.length != 16) {
 617                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 618                                 return tevent_req_post(req, ev);
 619                         }
 620                         /* we don't support durable handles yet */
 621                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 622                         return tevent_req_post(req, ev);
 623                 }
 624
 625                 if (alsi) {
 626                         if (dhnc) {
 627                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 628                                 return tevent_req_post(req, ev);
 629                         }
 630
 631                         if (alsi->data.length != 8) {
 632                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 633                                 return tevent_req_post(req, ev);
 634                         }
 635                         allocation_size = BVAL(alsi->data.data, 0);
 636                 }
 637
 638                 if (twrp) {
 639                         NTTIME nttime;
 640                         time_t t;
 641                         struct tm *tm;
 642
 643                         if (dhnc) {
 644                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 645                                 return tevent_req_post(req, ev);
 646                         }
 647
 648                         if (twrp->data.length != 8) {
 649                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 650                                 return tevent_req_post(req, ev);
 651                         }
 652
 653                         nttime = BVAL(twrp->data.data, 0);
 654                         t = nt_time_to_unix(nttime);
 655                         tm = gmtime(&t);
 656
 657                         TALLOC_FREE(fname);
 658                         fname = talloc_asprintf(state,
 659                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 660                                         tm->tm_year + 1900,
 661                                         tm->tm_mon + 1,
 662                                         tm->tm_mday,
 663                                         tm->tm_hour,
 664                                         tm->tm_min,
 665                                         tm->tm_sec,
 666                                         in_name);
 667                         if (tevent_req_nomem(fname, req)) {
 668                                 return tevent_req_post(req, ev);
 669                         }
 670                 }
 671
 672                 if (qfid) {
 673                         if (qfid->data.length != 0) {
 674                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 675                                 return tevent_req_post(req, ev);
 676                         }
 677                 }
 678
 679                 /* these are ignored for SMB2 */
 680                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 681                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 682
 683                 /*
 684                  * For a DFS path the function parse_dfs_path()
 685                  * will do the path processing.
 686                  */
 687
 688                 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 689                         /* convert '\\' into '/' */
 690                         status = check_path_syntax(fname);
 691                         if (!NT_STATUS_IS_OK(status)) {
 692                                 tevent_req_nterror(req, status);
 693                                 return tevent_req_post(req, ev);
 694                         }
 695                 }
 696
 697                 status = filename_convert(req,
 698                                           smb1req->conn,
 699                                           smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 700                                           fname,
 701                                           0,
 702                                           NULL,
 703                                           &smb_fname);
 704                 if (!NT_STATUS_IS_OK(status)) {
 705                         tevent_req_nterror(req, status);
 706                         return tevent_req_post(req, ev);
 707                 }
 708
 709                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 710
 711                 status = SMB_VFS_CREATE_FILE(smb1req->conn,
 712                                              smb1req,
 713                                              0, /* root_dir_fid */
 714                                              smb_fname,
 715                                              in_desired_access,
 716                                              in_share_access,
 717                                              in_create_disposition,
 718                                              in_create_options,
 719                                              in_file_attributes,
 720                                              map_smb2_oplock_levels_to_samba(requested_oplock_level),
 721                                              allocation_size,
 722                                              0, /* private_flags */
 723                                              sec_desc,
 724                                              ea_list,
 725                                              &result,
 726                                              &info);
 727                 if (!NT_STATUS_IS_OK(status)) {
 728                         if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 729                                 return req;
 730                         }
 731                         tevent_req_nterror(req, status);
 732                         return tevent_req_post(req, ev);
 733                 }
 734
 735                 if (mxac) {
 736                         NTTIME last_write_time;
 737
 738                         unix_timespec_to_nt_time(&last_write_time,
 739                                                  result->fsp_name->st.st_ex_mtime);
 740                         if (last_write_time != max_access_time) {
 741                                 uint8_t p[8];
 742                                 uint32_t max_access_granted;
 743                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 744
 745                                 status = smbd_calculate_access_mask(smb1req->conn,
 746                                                         result->fsp_name,
 747                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 748                                                         &max_access_granted);
 749
 750                                 SIVAL(p, 0, NT_STATUS_V(status));
 751                                 SIVAL(p, 4, max_access_granted);
 752
 753                                 status = smb2_create_blob_add(state,
 754                                                         &out_context_blobs,
 755                                                         SMB2_CREATE_TAG_MXAC,
 756                                                         blob);
 757                                 if (!NT_STATUS_IS_OK(status)) {
 758                                         tevent_req_nterror(req, status);
 759                                         return tevent_req_post(req, ev);
 760                                 }
 761                         }
 762                 }
 763
 764                 if (qfid) {
 765                         uint8_t p[32];
 766                         uint64_t file_index = get_FileIndex(result->conn,
 767                                                         &result->fsp_name->st);
 768                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 769
 770                         ZERO_STRUCT(p);
 771
 772                         /* From conversations with Microsoft engineers at
 773                            the MS plugfest. The first 8 bytes are the "volume index"
 774                            == inode, the second 8 bytes are the "volume id",
 775                            == dev. This will be updated in the SMB2 doc. */
 776                         SBVAL(p, 0, file_index);
 777                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
 778
 779                         status = smb2_create_blob_add(state, &out_context_blobs,
 780                                                       SMB2_CREATE_TAG_QFID,
 781                                                       blob);
 782                         if (!NT_STATUS_IS_OK(status)) {
 783                                 tevent_req_nterror(req, status);
 784                                 return tevent_req_post(req, ev);
 785                         }
 786                 }
 787         }
 788
 789         smb2req->compat_chain_fsp = smb1req->chain_fsp;
 790
 791         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
 792                 state->out_oplock_level = in_oplock_level;
 793         } else {
 794                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
 795         }
 796
 797         if ((in_create_disposition == FILE_SUPERSEDE)
 798             && (info == FILE_WAS_OVERWRITTEN)) {
 799                 state->out_create_action = FILE_WAS_SUPERSEDED;
 800         } else {
 801                 state->out_create_action = info;
 802         }
 803         state->out_file_attributes = dos_mode(result->conn,
 804                                            result->fsp_name);
 805         /* Deal with other possible opens having a modified
 806            write time. JRA. */
 807         ZERO_STRUCT(write_time_ts);
 808         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
 809         if (!null_timespec(write_time_ts)) {
 810                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
 811         }
 812
 813         unix_timespec_to_nt_time(&state->out_creation_time,
 814                         get_create_timespec(smb1req->conn, result,
 815                                         result->fsp_name));
 816         unix_timespec_to_nt_time(&state->out_last_access_time,
 817                         result->fsp_name->st.st_ex_atime);
 818         unix_timespec_to_nt_time(&state->out_last_write_time,
 819                         result->fsp_name->st.st_ex_mtime);
 820         unix_timespec_to_nt_time(&state->out_change_time,
 821                         get_change_timespec(smb1req->conn, result,
 822                                         result->fsp_name));
 823         state->out_allocation_size =
 824                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
 825                                                &(result->fsp_name->st));
 826         state->out_end_of_file = result->fsp_name->st.st_ex_size;
 827         if (state->out_file_attributes == 0) {
 828                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 829         }
 830         state->out_file_id_persistent = result->fnum;
 831         state->out_file_id_volatile = result->fnum;
 832         state->out_context_blobs = out_context_blobs;
 833
 834         tevent_req_done(req);
 835         return tevent_req_post(req, ev);
 836 }
 837
 838 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 839                         TALLOC_CTX *mem_ctx,
 840                         uint8_t *out_oplock_level,
 841                         uint32_t *out_create_action,
 842                         NTTIME *out_creation_time,
 843                         NTTIME *out_last_access_time,
 844                         NTTIME *out_last_write_time,
 845                         NTTIME *out_change_time,
 846                         uint64_t *out_allocation_size,
 847                         uint64_t *out_end_of_file,
 848                         uint32_t *out_file_attributes,
 849                         uint64_t *out_file_id_persistent,
 850                         uint64_t *out_file_id_volatile,
 851                         struct smb2_create_blobs *out_context_blobs)
 852 {
 853         NTSTATUS status;
 854         struct smbd_smb2_create_state *state = tevent_req_data(req,
 855                                                struct smbd_smb2_create_state);
 856
 857         if (tevent_req_is_nterror(req, &status)) {
 858                 tevent_req_received(req);
 859                 return status;
 860         }
 861
 862         *out_oplock_level       = state->out_oplock_level;
 863         *out_create_action      = state->out_create_action;
 864         *out_creation_time      = state->out_creation_time;
 865         *out_last_access_time   = state->out_last_access_time;
 866         *out_last_write_time    = state->out_last_write_time;
 867         *out_change_time        = state->out_change_time;
 868         *out_allocation_size    = state->out_allocation_size;
 869         *out_end_of_file        = state->out_end_of_file;
 870         *out_file_attributes    = state->out_file_attributes;
 871         *out_file_id_persistent = state->out_file_id_persistent;
 872         *out_file_id_volatile   = state->out_file_id_volatile;
 873         *out_context_blobs      = state->out_context_blobs;
 874
 875         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
 876
 877         tevent_req_received(req);
 878         return NT_STATUS_OK;
 879 }
 880
 881 /*********************************************************
 882  Code for dealing with deferred opens.
 883 *********************************************************/
 884
 885 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 886                         struct timeval *p_request_time,
 887                         void **pp_state)
 888 {
 889         struct smbd_smb2_create_state *state = NULL;
 890         struct tevent_req *req = NULL;
 891
 892         if (!smb2req) {
 893                 return false;
 894         }
 895         if (smb2req->async_te == NULL) {
 896                 return false;
 897         }
 898         req = smb2req->subreq;
 899         if (!req) {
 900                 return false;
 901         }
 902         state = tevent_req_data(req, struct smbd_smb2_create_state);
 903         if (!state) {
 904                 return false;
 905         }
 906         if (p_request_time) {
 907                 *p_request_time = state->request_time;
 908         }
 909         if (pp_state) {
 910                 *pp_state = (void *)state->private_data.data;
 911         }
 912         return true;
 913 }
 914
 915 /*********************************************************
 916  Re-process this call early - requested by message or
 917  close.
 918 *********************************************************/
 919
 920 static struct smbd_smb2_request *find_open_smb2req(
 921         struct smbd_server_connection *sconn, uint64_t mid)
 922 {
 923         struct smbd_smb2_request *smb2req;
 924
 925         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
 926                 uint64_t message_id;
 927                 if (smb2req->subreq == NULL) {
 928                         /* This message has been processed. */
 929                         continue;
 930                 }
 931                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
 932                         /* This message has been processed. */
 933                         continue;
 934                 }
 935                 message_id = get_mid_from_smb2req(smb2req);
 936                 if (message_id == mid) {
 937                         return smb2req;
 938                 }
 939         }
 940         return NULL;
 941 }
 942
 943 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
 944 {
 945         struct smbd_smb2_create_state *state = NULL;
 946         struct smbd_smb2_request *smb2req;
 947
 948         smb2req = find_open_smb2req(sconn, mid);
 949
 950         if (!smb2req) {
 951                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
 952                         (unsigned long long)mid));
 953                 return false;
 954         }
 955         if (!smb2req->subreq) {
 956                 return false;
 957         }
 958         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 959                 return false;
 960         }
 961         state = tevent_req_data(smb2req->subreq,
 962                         struct smbd_smb2_create_state);
 963         if (!state) {
 964                 return false;
 965         }
 966         /* It's not in progress if there's no timeout event. */
 967         if (!state->te) {
 968                 return false;
 969         }
 970
 971         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
 972                         (unsigned long long)mid));
 973
 974         return true;
 975 }
 976
 977 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
 978                                                         uint64_t mid)
 979 {
 980         struct smbd_smb2_create_state *state = NULL;
 981
 982         if (!smb2req->subreq) {
 983                 return;
 984         }
 985         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 986                 return;
 987         }
 988         state = tevent_req_data(smb2req->subreq,
 989                         struct smbd_smb2_create_state);
 990         if (!state) {
 991                 return;
 992         }
 993
 994         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
 995                 "mid %llu\n",
 996                 (unsigned long long)mid ));
 997
 998         /* Ensure we don't have any outstanding timer event. */
 999         TALLOC_FREE(state->te);
1000         /* Ensure we don't have any outstanding immediate event. */
1001         TALLOC_FREE(state->im);
1002 }
1003
1004 void remove_deferred_open_message_smb2(
1005         struct smbd_server_connection *sconn, uint64_t mid)
1006 {
1007         struct smbd_smb2_request *smb2req;
1008
1009         smb2req = find_open_smb2req(sconn, mid);
1010
1011         if (!smb2req) {
1012                 DEBUG(10,("remove_deferred_open_message_smb2: "
1013                         "can't find mid %llu\n",
1014                         (unsigned long long)mid ));
1015                 return;
1016         }
1017         remove_deferred_open_message_smb2_internal(smb2req, mid);
1018 }
1019
1020 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1021                                         struct tevent_immediate *im,
1022                                         void *private_data)
1023 {
1024         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1025                                         struct smbd_smb2_request);
1026         struct smbd_server_connection *sconn = smb2req->sconn;
1027         uint64_t mid = get_mid_from_smb2req(smb2req);
1028         NTSTATUS status;
1029
1030         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1031                 "re-dispatching mid %llu\n",
1032                 (unsigned long long)mid ));
1033
1034         status = smbd_smb2_request_dispatch(smb2req);
1035         if (!NT_STATUS_IS_OK(status)) {
1036                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1037                 return;
1038         }
1039 }
1040
1041 void schedule_deferred_open_message_smb2(
1042         struct smbd_server_connection *sconn, uint64_t mid)
1043 {
1044         struct smbd_smb2_create_state *state = NULL;
1045         struct smbd_smb2_request *smb2req;
1046
1047         smb2req = find_open_smb2req(sconn, mid);
1048
1049         if (!smb2req) {
1050                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1051                         "can't find mid %llu\n",
1052                         (unsigned long long)mid ));
1053                 return;
1054         }
1055         if (!smb2req->subreq) {
1056                 return;
1057         }
1058         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1059                 return;
1060         }
1061         state = tevent_req_data(smb2req->subreq,
1062                         struct smbd_smb2_create_state);
1063         if (!state) {
1064                 return;
1065         }
1066
1067         /* Ensure we don't have any outstanding timer event. */
1068         TALLOC_FREE(state->te);
1069         /* Ensure we don't have any outstanding immediate event. */
1070         TALLOC_FREE(state->im);
1071
1072         /*
1073          * This is subtle. We must null out the callback
1074          * before resheduling, else the first call to
1075          * tevent_req_nterror() causes the _receive()
1076          * function to be called, this causing tevent_req_post()
1077          * to crash.
1078          */
1079         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1080
1081         state->im = tevent_create_immediate(smb2req);
1082         if (!state->im) {
1083                 smbd_server_connection_terminate(smb2req->sconn,
1084                         nt_errstr(NT_STATUS_NO_MEMORY));
1085                 return;
1086         }
1087
1088         DEBUG(10,("schedule_deferred_open_message_smb2: "
1089                 "re-processing mid %llu\n",
1090                 (unsigned long long)mid ));
1091
1092         tevent_schedule_immediate(state->im,
1093                         smb2req->sconn->ev_ctx,
1094                         smbd_smb2_create_request_dispatch_immediate,
1095                         smb2req);
1096 }
1097
1098 /*********************************************************
1099  Re-process this call.
1100 *********************************************************/
1101
1102 static void smb2_deferred_open_timer(struct event_context *ev,
1103                                         struct timed_event *te,
1104                                         struct timeval _tval,
1105                                         void *private_data)
1106 {
1107         NTSTATUS status;
1108         struct smbd_smb2_create_state *state = NULL;
1109         struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1110                                                 struct smbd_smb2_request);
1111
1112         DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1113                 smb2req->current_idx,
1114                 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1115
1116         state = tevent_req_data(smb2req->subreq,
1117                         struct smbd_smb2_create_state);
1118         if (!state) {
1119                 return;
1120         }
1121         /*
1122          * Null this out, don't talloc_free. It will
1123          * be talloc_free'd by the tevent library when
1124          * this returns.
1125          */
1126         state->te = NULL;
1127         /* Ensure we don't have any outstanding immediate event. */
1128         TALLOC_FREE(state->im);
1129
1130         /*
1131          * This is subtle. We must null out the callback
1132          * before resheduling, else the first call to
1133          * tevent_req_nterror() causes the _receive()
1134          * function to be called, this causing tevent_req_post()
1135          * to crash.
1136          */
1137         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1138
1139         status = smbd_smb2_request_dispatch(smb2req);
1140
1141         if (!NT_STATUS_IS_OK(status)) {
1142                 smbd_server_connection_terminate(smb2req->sconn,
1143                                 nt_errstr(status));
1144         }
1145 }
1146
1147 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1148 {
1149         struct smbd_smb2_request *smb2req = NULL;
1150         struct smbd_smb2_create_state *state = tevent_req_data(req,
1151                                 struct smbd_smb2_create_state);
1152         uint64_t mid;
1153
1154         if (!state) {
1155                 return false;
1156         }
1157
1158         if (!state->smb2req) {
1159                 return false;
1160         }
1161
1162         smb2req = state->smb2req;
1163         mid = get_mid_from_smb2req(smb2req);
1164
1165         remove_deferred_open_entry(state->id, mid,
1166                                    messaging_server_id(smb2req->sconn->msg_ctx));
1167         remove_deferred_open_message_smb2_internal(smb2req, mid);
1168         smb2req->cancelled = true;
1169
1170         tevent_req_done(req);
1171         return true;
1172 }
1173
1174 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1175                                 struct timeval request_time,
1176                                 struct timeval timeout,
1177                                 struct file_id id,
1178                                 char *private_data,
1179                                 size_t priv_len)
1180 {
1181         struct tevent_req *req = NULL;
1182         struct smbd_smb2_create_state *state = NULL;
1183         struct timeval end_time;
1184
1185         if (!smb2req) {
1186                 return false;
1187         }
1188         req = smb2req->subreq;
1189         if (!req) {
1190                 return false;
1191         }
1192         state = tevent_req_data(req, struct smbd_smb2_create_state);
1193         if (!state) {
1194                 return false;
1195         }
1196         state->id = id;
1197         state->request_time = request_time;
1198         state->private_data = data_blob_talloc(state, private_data,
1199                                                 priv_len);
1200         if (!state->private_data.data) {
1201                 return false;
1202         }
1203
1204         /* Re-schedule us to retry on timer expiry. */
1205         end_time = timeval_sum(&request_time, &timeout);
1206
1207         DEBUG(10,("push_deferred_open_message_smb2: "
1208                 "timeout at %s\n",
1209                 timeval_string(talloc_tos(),
1210                                 &end_time,
1211                                 true) ));
1212
1213         state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1214                                 state,
1215                                 end_time,
1216                                 smb2_deferred_open_timer,
1217                                 smb2req);
1218         if (!state->te) {
1219                 return false;
1220         }
1221
1222         /* allow this request to be canceled */
1223         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1224
1225         return true;
1226 }