source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "printing.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/smb/smb_common.h"
  27 #include "../librpc/gen_ndr/ndr_security.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29 #include "messages.h"
  30
  31 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  32 {
  33         switch(in_oplock_level) {
  34         case SMB2_OPLOCK_LEVEL_NONE:
  35                 return NO_OPLOCK;
  36         case SMB2_OPLOCK_LEVEL_II:
  37                 return LEVEL_II_OPLOCK;
  38         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  39                 return EXCLUSIVE_OPLOCK;
  40         case SMB2_OPLOCK_LEVEL_BATCH:
  41                 return BATCH_OPLOCK;
  42         case SMB2_OPLOCK_LEVEL_LEASE:
  43                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  44                         "LEASE_OPLOCK_REQUESTED\n"));
  45                 return NO_OPLOCK;
  46         default:
  47                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  48                         "unknown level %u\n",
  49                         (unsigned int)in_oplock_level));
  50                 return NO_OPLOCK;
  51         }
  52 }
  53
  54 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  55 {
  56         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  57                 return SMB2_OPLOCK_LEVEL_BATCH;
  58         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  59                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  60         } else if (oplock_type == LEVEL_II_OPLOCK) {
  61                 /*
  62                  * Don't use LEVEL_II_OPLOCK_TYPE here as
  63                  * this also includes FAKE_LEVEL_II_OPLOCKs
  64                  * which are internal only.
  65                  */
  66                 return SMB2_OPLOCK_LEVEL_II;
  67         } else {
  68                 return SMB2_OPLOCK_LEVEL_NONE;
  69         }
  70 }
  71
  72 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  73                         struct tevent_context *ev,
  74                         struct smbd_smb2_request *smb2req,
  75                         uint8_t in_oplock_level,
  76                         uint32_t in_impersonation_level,
  77                         uint32_t in_desired_access,
  78                         uint32_t in_file_attributes,
  79                         uint32_t in_share_access,
  80                         uint32_t in_create_disposition,
  81                         uint32_t in_create_options,
  82                         const char *in_name,
  83                         struct smb2_create_blobs in_context_blobs);
  84 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  85                         TALLOC_CTX *mem_ctx,
  86                         uint8_t *out_oplock_level,
  87                         uint32_t *out_create_action,
  88                         NTTIME *out_creation_time,
  89                         NTTIME *out_last_access_time,
  90                         NTTIME *out_last_write_time,
  91                         NTTIME *out_change_time,
  92                         uint64_t *out_allocation_size,
  93                         uint64_t *out_end_of_file,
  94                         uint32_t *out_file_attributes,
  95                         uint64_t *out_file_id_persistent,
  96                         uint64_t *out_file_id_volatile,
  97                         struct smb2_create_blobs *out_context_blobs);
  98
  99 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
 100 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
 101 {
 102         const uint8_t *inbody;
 103         const struct iovec *indyniov;
 104         uint8_t in_oplock_level;
 105         uint32_t in_impersonation_level;
 106         uint32_t in_desired_access;
 107         uint32_t in_file_attributes;
 108         uint32_t in_share_access;
 109         uint32_t in_create_disposition;
 110         uint32_t in_create_options;
 111         uint16_t in_name_offset;
 112         uint16_t in_name_length;
 113         DATA_BLOB in_name_buffer;
 114         char *in_name_string;
 115         size_t in_name_string_size;
 116         uint32_t name_offset = 0;
 117         uint32_t name_available_length = 0;
 118         uint32_t in_context_offset;
 119         uint32_t in_context_length;
 120         DATA_BLOB in_context_buffer;
 121         struct smb2_create_blobs in_context_blobs;
 122         uint32_t context_offset = 0;
 123         uint32_t context_available_length = 0;
 124         uint32_t dyn_offset;
 125         NTSTATUS status;
 126         bool ok;
 127         struct tevent_req *tsubreq;
 128
 129         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 130         if (!NT_STATUS_IS_OK(status)) {
 131                 return smbd_smb2_request_error(smb2req, status);
 132         }
 133         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 134
 135         in_oplock_level         = CVAL(inbody, 0x03);
 136         in_impersonation_level  = IVAL(inbody, 0x04);
 137         in_desired_access       = IVAL(inbody, 0x18);
 138         in_file_attributes      = IVAL(inbody, 0x1C);
 139         in_share_access         = IVAL(inbody, 0x20);
 140         in_create_disposition   = IVAL(inbody, 0x24);
 141         in_create_options       = IVAL(inbody, 0x28);
 142         in_name_offset          = SVAL(inbody, 0x2C);
 143         in_name_length          = SVAL(inbody, 0x2E);
 144         in_context_offset       = IVAL(inbody, 0x30);
 145         in_context_length       = IVAL(inbody, 0x34);
 146
 147         /*
 148          * First check if the dynamic name and context buffers
 149          * are correctly specified.
 150          *
 151          * Note: That we don't check if the name and context buffers
 152          *       overlap
 153          */
 154
 155         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 156
 157         if (in_name_offset == 0 && in_name_length == 0) {
 158                 /* This is ok */
 159                 name_offset = 0;
 160         } else if (in_name_offset < dyn_offset) {
 161                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 162         } else {
 163                 name_offset = in_name_offset - dyn_offset;
 164         }
 165
 166         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 167
 168         if (name_offset > indyniov->iov_len) {
 169                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 170         }
 171
 172         name_available_length = indyniov->iov_len - name_offset;
 173
 174         if (in_name_length > name_available_length) {
 175                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 176         }
 177
 178         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 179         in_name_buffer.length = in_name_length;
 180
 181         if (in_context_offset == 0 && in_context_length == 0) {
 182                 /* This is ok */
 183                 context_offset = 0;
 184         } else if (in_context_offset < dyn_offset) {
 185                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 186         } else {
 187                 context_offset = in_context_offset - dyn_offset;
 188         }
 189
 190         if (context_offset > indyniov->iov_len) {
 191                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 192         }
 193
 194         context_available_length = indyniov->iov_len - context_offset;
 195
 196         if (in_context_length > context_available_length) {
 197                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 198         }
 199
 200         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 201                 context_offset;
 202         in_context_buffer.length = in_context_length;
 203
 204         /*
 205          * Now interpret the name and context buffers
 206          */
 207
 208         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 209                                    in_name_buffer.data,
 210                                    in_name_buffer.length,
 211                                    &in_name_string,
 212                                    &in_name_string_size);
 213         if (!ok) {
 214                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 215         }
 216
 217         if (in_name_buffer.length == 0) {
 218                 in_name_string_size = 0;
 219         }
 220
 221         if (strlen(in_name_string) != in_name_string_size) {
 222                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 223         }
 224
 225         ZERO_STRUCT(in_context_blobs);
 226         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 227         if (!NT_STATUS_IS_OK(status)) {
 228                 return smbd_smb2_request_error(smb2req, status);
 229         }
 230
 231         tsubreq = smbd_smb2_create_send(smb2req,
 232                                        smb2req->sconn->ev_ctx,
 233                                        smb2req,
 234                                        in_oplock_level,
 235                                        in_impersonation_level,
 236                                        in_desired_access,
 237                                        in_file_attributes,
 238                                        in_share_access,
 239                                        in_create_disposition,
 240                                        in_create_options,
 241                                        in_name_string,
 242                                        in_context_blobs);
 243         if (tsubreq == NULL) {
 244                 smb2req->subreq = NULL;
 245                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 246         }
 247         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 248
 249         /*
 250          * For now we keep the logic that we do not send STATUS_PENDING
 251          * for sharing violations, so we just wait 2 seconds.
 252          *
 253          * TODO: we need more tests for this.
 254          */
 255         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 256 }
 257
 258 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 259 {
 260         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 261         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 262 }
 263
 264 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 265 {
 266         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 267                                         struct smbd_smb2_request);
 268         DATA_BLOB outbody;
 269         DATA_BLOB outdyn;
 270         uint8_t out_oplock_level = 0;
 271         uint32_t out_create_action = 0;
 272         NTTIME out_creation_time = 0;
 273         NTTIME out_last_access_time = 0;
 274         NTTIME out_last_write_time = 0;
 275         NTTIME out_change_time = 0;
 276         uint64_t out_allocation_size = 0;
 277         uint64_t out_end_of_file = 0;
 278         uint32_t out_file_attributes = 0;
 279         uint64_t out_file_id_persistent = 0;
 280         uint64_t out_file_id_volatile = 0;
 281         struct smb2_create_blobs out_context_blobs;
 282         DATA_BLOB out_context_buffer;
 283         uint16_t out_context_buffer_offset = 0;
 284         NTSTATUS status;
 285         NTSTATUS error; /* transport error */
 286
 287         if (smb2req->cancelled) {
 288                 uint64_t mid = get_mid_from_smb2req(smb2req);
 289                 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
 290                         (unsigned long long)mid ));
 291                 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
 292                 if (!NT_STATUS_IS_OK(error)) {
 293                         smbd_server_connection_terminate(smb2req->sconn,
 294                                 nt_errstr(error));
 295                         return;
 296                 }
 297                 return;
 298         }
 299
 300         status = smbd_smb2_create_recv(tsubreq,
 301                                        smb2req,
 302                                        &out_oplock_level,
 303                                        &out_create_action,
 304                                        &out_creation_time,
 305                                        &out_last_access_time,
 306                                        &out_last_write_time,
 307                                        &out_change_time,
 308                                        &out_allocation_size,
 309                                        &out_end_of_file,
 310                                        &out_file_attributes,
 311                                        &out_file_id_persistent,
 312                                        &out_file_id_volatile,
 313                                        &out_context_blobs);
 314         if (!NT_STATUS_IS_OK(status)) {
 315                 error = smbd_smb2_request_error(smb2req, status);
 316                 if (!NT_STATUS_IS_OK(error)) {
 317                         smbd_server_connection_terminate(smb2req->sconn,
 318                                                          nt_errstr(error));
 319                         return;
 320                 }
 321                 return;
 322         }
 323
 324         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 325         if (!NT_STATUS_IS_OK(status)) {
 326                 error = smbd_smb2_request_error(smb2req, status);
 327                 if (!NT_STATUS_IS_OK(error)) {
 328                         smbd_server_connection_terminate(smb2req->sconn,
 329                                                          nt_errstr(error));
 330                         return;
 331                 }
 332                 return;
 333         }
 334
 335         if (out_context_buffer.length > 0) {
 336                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 337         }
 338
 339         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 340         if (outbody.data == NULL) {
 341                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 342                 if (!NT_STATUS_IS_OK(error)) {
 343                         smbd_server_connection_terminate(smb2req->sconn,
 344                                                          nt_errstr(error));
 345                         return;
 346                 }
 347                 return;
 348         }
 349
 350         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 351         SCVAL(outbody.data, 0x02,
 352               out_oplock_level);                /* oplock level */
 353         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 354         SIVAL(outbody.data, 0x04,
 355               out_create_action);               /* create action */
 356         SBVAL(outbody.data, 0x08,
 357               out_creation_time);               /* creation time */
 358         SBVAL(outbody.data, 0x10,
 359               out_last_access_time);            /* last access time */
 360         SBVAL(outbody.data, 0x18,
 361               out_last_write_time);             /* last write time */
 362         SBVAL(outbody.data, 0x20,
 363               out_change_time);                 /* change time */
 364         SBVAL(outbody.data, 0x28,
 365               out_allocation_size);             /* allocation size */
 366         SBVAL(outbody.data, 0x30,
 367               out_end_of_file);                 /* end of file */
 368         SIVAL(outbody.data, 0x38,
 369               out_file_attributes);             /* file attributes */
 370         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 371         SBVAL(outbody.data, 0x40,
 372               out_file_id_persistent);          /* file id (persistent) */
 373         SBVAL(outbody.data, 0x48,
 374               out_file_id_volatile);            /* file id (volatile) */
 375         SIVAL(outbody.data, 0x50,
 376               out_context_buffer_offset);       /* create contexts offset */
 377         SIVAL(outbody.data, 0x54,
 378               out_context_buffer.length);       /* create contexts length */
 379
 380         outdyn = out_context_buffer;
 381
 382         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 383         if (!NT_STATUS_IS_OK(error)) {
 384                 smbd_server_connection_terminate(smb2req->sconn,
 385                                                  nt_errstr(error));
 386                 return;
 387         }
 388 }
 389
 390 struct smbd_smb2_create_state {
 391         struct smbd_smb2_request *smb2req;
 392         struct smb_request *smb1req;
 393         struct timed_event *te;
 394         struct tevent_immediate *im;
 395         struct timeval request_time;
 396         struct file_id id;
 397         DATA_BLOB private_data;
 398         uint8_t out_oplock_level;
 399         uint32_t out_create_action;
 400         NTTIME out_creation_time;
 401         NTTIME out_last_access_time;
 402         NTTIME out_last_write_time;
 403         NTTIME out_change_time;
 404         uint64_t out_allocation_size;
 405         uint64_t out_end_of_file;
 406         uint32_t out_file_attributes;
 407         uint64_t out_file_id_persistent;
 408         uint64_t out_file_id_volatile;
 409         struct smb2_create_blobs out_context_blobs;
 410 };
 411
 412 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 413                         struct tevent_context *ev,
 414                         struct smbd_smb2_request *smb2req,
 415                         uint8_t in_oplock_level,
 416                         uint32_t in_impersonation_level,
 417                         uint32_t in_desired_access,
 418                         uint32_t in_file_attributes,
 419                         uint32_t in_share_access,
 420                         uint32_t in_create_disposition,
 421                         uint32_t in_create_options,
 422                         const char *in_name,
 423                         struct smb2_create_blobs in_context_blobs)
 424 {
 425         struct tevent_req *req = NULL;
 426         struct smbd_smb2_create_state *state = NULL;
 427         NTSTATUS status;
 428         struct smb_request *smb1req = NULL;
 429         files_struct *result = NULL;
 430         int info;
 431         struct timespec write_time_ts;
 432         struct smb2_create_blobs out_context_blobs;
 433         int requested_oplock_level;
 434         struct smb2_create_blob *dhnc = NULL;
 435
 436         ZERO_STRUCT(out_context_blobs);
 437
 438         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 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         dhnc = smb2_create_blob_find(&in_context_blobs,
 473                                      SMB2_CREATE_TAG_DHNC);
 474
 475         if (dhnc) {
 476                 if (dhnc->data.length != 16) {
 477                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 478                         return tevent_req_post(req, ev);
 479                 }
 480                 /* we don't support durable handles yet */
 481                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 482                 return tevent_req_post(req, ev);
 483         }
 484
 485         if (IS_IPC(smb1req->conn)) {
 486                 const char *pipe_name = in_name;
 487
 488                 if (!lp_nt_pipe_support()) {
 489                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 490                         return tevent_req_post(req, ev);
 491                 }
 492
 493                 status = open_np_file(smb1req, pipe_name, &result);
 494                 if (!NT_STATUS_IS_OK(status)) {
 495                         tevent_req_nterror(req, status);
 496                         return tevent_req_post(req, ev);
 497                 }
 498                 info = FILE_WAS_OPENED;
 499         } else if (CAN_PRINT(smb1req->conn)) {
 500                 status = file_new(smb1req, smb1req->conn, &result);
 501                 if(!NT_STATUS_IS_OK(status)) {
 502                         tevent_req_nterror(req, status);
 503                         return tevent_req_post(req, ev);
 504                 }
 505
 506                 status = print_spool_open(result, in_name,
 507                                           smb1req->vuid);
 508                 if (!NT_STATUS_IS_OK(status)) {
 509                         file_free(smb1req, result);
 510                         tevent_req_nterror(req, status);
 511                         return tevent_req_post(req, ev);
 512                 }
 513                 info = FILE_WAS_CREATED;
 514         } else {
 515                 char *fname;
 516                 struct smb_filename *smb_fname = NULL;
 517                 struct smb2_create_blob *exta = NULL;
 518                 struct ea_list *ea_list = NULL;
 519                 struct smb2_create_blob *mxac = NULL;
 520                 NTTIME max_access_time = 0;
 521                 struct smb2_create_blob *secd = NULL;
 522                 struct security_descriptor *sec_desc = NULL;
 523                 struct smb2_create_blob *dhnq = NULL;
 524                 struct smb2_create_blob *alsi = NULL;
 525                 uint64_t allocation_size = 0;
 526                 struct smb2_create_blob *twrp = NULL;
 527                 struct smb2_create_blob *qfid = NULL;
 528
 529                 exta = smb2_create_blob_find(&in_context_blobs,
 530                                              SMB2_CREATE_TAG_EXTA);
 531                 mxac = smb2_create_blob_find(&in_context_blobs,
 532                                              SMB2_CREATE_TAG_MXAC);
 533                 secd = smb2_create_blob_find(&in_context_blobs,
 534                                              SMB2_CREATE_TAG_SECD);
 535                 dhnq = smb2_create_blob_find(&in_context_blobs,
 536                                              SMB2_CREATE_TAG_DHNQ);
 537                 alsi = smb2_create_blob_find(&in_context_blobs,
 538                                              SMB2_CREATE_TAG_ALSI);
 539                 twrp = smb2_create_blob_find(&in_context_blobs,
 540                                              SMB2_CREATE_TAG_TWRP);
 541                 qfid = smb2_create_blob_find(&in_context_blobs,
 542                                              SMB2_CREATE_TAG_QFID);
 543
 544                 fname = talloc_strdup(state, in_name);
 545                 if (tevent_req_nomem(fname, req)) {
 546                         return tevent_req_post(req, ev);
 547                 }
 548
 549                 if (exta) {
 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 (mxac->data.length == 0) {
 561                                 max_access_time = 0;
 562                         } else if (mxac->data.length == 8) {
 563                                 max_access_time = BVAL(mxac->data.data, 0);
 564                         } else {
 565                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 566                                 return tevent_req_post(req, ev);
 567                         }
 568                 }
 569
 570                 if (secd) {
 571                         enum ndr_err_code ndr_err;
 572
 573                         sec_desc = talloc_zero(state, struct security_descriptor);
 574                         if (tevent_req_nomem(sec_desc, req)) {
 575                                 return tevent_req_post(req, ev);
 576                         }
 577
 578                         ndr_err = ndr_pull_struct_blob(&secd->data,
 579                                 sec_desc, sec_desc,
 580                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 581                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 582                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 583                                          ndr_errstr(ndr_err)));
 584                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 585                                 return tevent_req_post(req, ev);
 586                         }
 587                 }
 588
 589                 if (dhnq) {
 590                         if (dhnq->data.length != 16) {
 591                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 592                                 return tevent_req_post(req, ev);
 593                         }
 594                         /*
 595                          * we don't support durable handles yet
 596                          * and have to ignore this
 597                          */
 598                 }
 599
 600                 if (alsi) {
 601                         if (alsi->data.length != 8) {
 602                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 603                                 return tevent_req_post(req, ev);
 604                         }
 605                         allocation_size = BVAL(alsi->data.data, 0);
 606                 }
 607
 608                 if (twrp) {
 609                         NTTIME nttime;
 610                         time_t t;
 611                         struct tm *tm;
 612
 613                         if (twrp->data.length != 8) {
 614                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 615                                 return tevent_req_post(req, ev);
 616                         }
 617
 618                         nttime = BVAL(twrp->data.data, 0);
 619                         t = nt_time_to_unix(nttime);
 620                         tm = gmtime(&t);
 621
 622                         TALLOC_FREE(fname);
 623                         fname = talloc_asprintf(state,
 624                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 625                                         tm->tm_year + 1900,
 626                                         tm->tm_mon + 1,
 627                                         tm->tm_mday,
 628                                         tm->tm_hour,
 629                                         tm->tm_min,
 630                                         tm->tm_sec,
 631                                         in_name);
 632                         if (tevent_req_nomem(fname, req)) {
 633                                 return tevent_req_post(req, ev);
 634                         }
 635                 }
 636
 637                 if (qfid) {
 638                         if (qfid->data.length != 0) {
 639                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 640                                 return tevent_req_post(req, ev);
 641                         }
 642                 }
 643
 644                 /* these are ignored for SMB2 */
 645                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 646                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 647
 648                 /*
 649                  * For a DFS path the function parse_dfs_path()
 650                  * will do the path processing.
 651                  */
 652
 653                 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 654                         /* convert '\\' into '/' */
 655                         status = check_path_syntax(fname);
 656                         if (!NT_STATUS_IS_OK(status)) {
 657                                 tevent_req_nterror(req, status);
 658                                 return tevent_req_post(req, ev);
 659                         }
 660                 }
 661
 662                 status = filename_convert(req,
 663                                           smb1req->conn,
 664                                           smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 665                                           fname,
 666                                           0,    /* unix_convert flags */
 667                                           NULL, /* ppath_contains_wcards */
 668                                           &smb_fname);
 669                 if (!NT_STATUS_IS_OK(status)) {
 670                         tevent_req_nterror(req, status);
 671                         return tevent_req_post(req, ev);
 672                 }
 673
 674                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 675
 676                 status = SMB_VFS_CREATE_FILE(smb1req->conn,
 677                                              smb1req,
 678                                              0, /* root_dir_fid */
 679                                              smb_fname,
 680                                              in_desired_access,
 681                                              in_share_access,
 682                                              in_create_disposition,
 683                                              in_create_options,
 684                                              in_file_attributes,
 685                                              map_smb2_oplock_levels_to_samba(requested_oplock_level),
 686                                              allocation_size,
 687                                              0, /* private_flags */
 688                                              sec_desc,
 689                                              ea_list,
 690                                              &result,
 691                                              &info);
 692                 if (!NT_STATUS_IS_OK(status)) {
 693                         if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 694                                 return req;
 695                         }
 696                         tevent_req_nterror(req, status);
 697                         return tevent_req_post(req, ev);
 698                 }
 699
 700                 if (mxac) {
 701                         NTTIME last_write_time;
 702
 703                         unix_timespec_to_nt_time(&last_write_time,
 704                                                  result->fsp_name->st.st_ex_mtime);
 705                         if (last_write_time != max_access_time) {
 706                                 uint8_t p[8];
 707                                 uint32_t max_access_granted;
 708                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 709
 710                                 status = smbd_calculate_access_mask(smb1req->conn,
 711                                                         result->fsp_name,
 712                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 713                                                         &max_access_granted);
 714
 715                                 SIVAL(p, 0, NT_STATUS_V(status));
 716                                 SIVAL(p, 4, max_access_granted);
 717
 718                                 status = smb2_create_blob_add(state,
 719                                                         &out_context_blobs,
 720                                                         SMB2_CREATE_TAG_MXAC,
 721                                                         blob);
 722                                 if (!NT_STATUS_IS_OK(status)) {
 723                                         tevent_req_nterror(req, status);
 724                                         return tevent_req_post(req, ev);
 725                                 }
 726                         }
 727                 }
 728
 729                 if (qfid) {
 730                         uint8_t p[32];
 731                         uint64_t file_index = get_FileIndex(result->conn,
 732                                                         &result->fsp_name->st);
 733                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 734
 735                         ZERO_STRUCT(p);
 736
 737                         /* From conversations with Microsoft engineers at
 738                            the MS plugfest. The first 8 bytes are the "volume index"
 739                            == inode, the second 8 bytes are the "volume id",
 740                            == dev. This will be updated in the SMB2 doc. */
 741                         SBVAL(p, 0, file_index);
 742                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
 743
 744                         status = smb2_create_blob_add(state, &out_context_blobs,
 745                                                       SMB2_CREATE_TAG_QFID,
 746                                                       blob);
 747                         if (!NT_STATUS_IS_OK(status)) {
 748                                 tevent_req_nterror(req, status);
 749                                 return tevent_req_post(req, ev);
 750                         }
 751                 }
 752         }
 753
 754         smb2req->compat_chain_fsp = smb1req->chain_fsp;
 755
 756         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 757                 state->out_oplock_level = in_oplock_level;
 758         } else {
 759                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
 760         }
 761
 762         if ((in_create_disposition == FILE_SUPERSEDE)
 763             && (info == FILE_WAS_OVERWRITTEN)) {
 764                 state->out_create_action = FILE_WAS_SUPERSEDED;
 765         } else {
 766                 state->out_create_action = info;
 767         }
 768         state->out_file_attributes = dos_mode(result->conn,
 769                                            result->fsp_name);
 770         /* Deal with other possible opens having a modified
 771            write time. JRA. */
 772         ZERO_STRUCT(write_time_ts);
 773         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
 774         if (!null_timespec(write_time_ts)) {
 775                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
 776         }
 777
 778         unix_timespec_to_nt_time(&state->out_creation_time,
 779                         get_create_timespec(smb1req->conn, result,
 780                                         result->fsp_name));
 781         unix_timespec_to_nt_time(&state->out_last_access_time,
 782                         result->fsp_name->st.st_ex_atime);
 783         unix_timespec_to_nt_time(&state->out_last_write_time,
 784                         result->fsp_name->st.st_ex_mtime);
 785         unix_timespec_to_nt_time(&state->out_change_time,
 786                         get_change_timespec(smb1req->conn, result,
 787                                         result->fsp_name));
 788         state->out_allocation_size =
 789                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
 790                                                &(result->fsp_name->st));
 791         state->out_end_of_file = result->fsp_name->st.st_ex_size;
 792         if (state->out_file_attributes == 0) {
 793                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 794         }
 795         state->out_file_id_persistent = result->op->global->open_persistent_id;
 796         state->out_file_id_volatile = result->op->global->open_volatile_id;
 797         state->out_context_blobs = out_context_blobs;
 798
 799         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
 800                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
 801
 802         tevent_req_done(req);
 803         return tevent_req_post(req, ev);
 804 }
 805
 806 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 807                         TALLOC_CTX *mem_ctx,
 808                         uint8_t *out_oplock_level,
 809                         uint32_t *out_create_action,
 810                         NTTIME *out_creation_time,
 811                         NTTIME *out_last_access_time,
 812                         NTTIME *out_last_write_time,
 813                         NTTIME *out_change_time,
 814                         uint64_t *out_allocation_size,
 815                         uint64_t *out_end_of_file,
 816                         uint32_t *out_file_attributes,
 817                         uint64_t *out_file_id_persistent,
 818                         uint64_t *out_file_id_volatile,
 819                         struct smb2_create_blobs *out_context_blobs)
 820 {
 821         NTSTATUS status;
 822         struct smbd_smb2_create_state *state = tevent_req_data(req,
 823                                                struct smbd_smb2_create_state);
 824
 825         if (tevent_req_is_nterror(req, &status)) {
 826                 tevent_req_received(req);
 827                 return status;
 828         }
 829
 830         *out_oplock_level       = state->out_oplock_level;
 831         *out_create_action      = state->out_create_action;
 832         *out_creation_time      = state->out_creation_time;
 833         *out_last_access_time   = state->out_last_access_time;
 834         *out_last_write_time    = state->out_last_write_time;
 835         *out_change_time        = state->out_change_time;
 836         *out_allocation_size    = state->out_allocation_size;
 837         *out_end_of_file        = state->out_end_of_file;
 838         *out_file_attributes    = state->out_file_attributes;
 839         *out_file_id_persistent = state->out_file_id_persistent;
 840         *out_file_id_volatile   = state->out_file_id_volatile;
 841         *out_context_blobs      = state->out_context_blobs;
 842
 843         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
 844
 845         tevent_req_received(req);
 846         return NT_STATUS_OK;
 847 }
 848
 849 /*********************************************************
 850  Code for dealing with deferred opens.
 851 *********************************************************/
 852
 853 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 854                         struct timeval *p_request_time,
 855                         void **pp_state)
 856 {
 857         struct smbd_smb2_create_state *state = NULL;
 858         struct tevent_req *req = NULL;
 859
 860         if (!smb2req) {
 861                 return false;
 862         }
 863         if (smb2req->async_te == NULL) {
 864                 return false;
 865         }
 866         req = smb2req->subreq;
 867         if (!req) {
 868                 return false;
 869         }
 870         state = tevent_req_data(req, struct smbd_smb2_create_state);
 871         if (!state) {
 872                 return false;
 873         }
 874         if (p_request_time) {
 875                 *p_request_time = state->request_time;
 876         }
 877         if (pp_state) {
 878                 *pp_state = (void *)state->private_data.data;
 879         }
 880         return true;
 881 }
 882
 883 /*********************************************************
 884  Re-process this call early - requested by message or
 885  close.
 886 *********************************************************/
 887
 888 static struct smbd_smb2_request *find_open_smb2req(
 889         struct smbd_server_connection *sconn, uint64_t mid)
 890 {
 891         struct smbd_smb2_request *smb2req;
 892
 893         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
 894                 uint64_t message_id;
 895                 if (smb2req->subreq == NULL) {
 896                         /* This message has been processed. */
 897                         continue;
 898                 }
 899                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
 900                         /* This message has been processed. */
 901                         continue;
 902                 }
 903                 message_id = get_mid_from_smb2req(smb2req);
 904                 if (message_id == mid) {
 905                         return smb2req;
 906                 }
 907         }
 908         return NULL;
 909 }
 910
 911 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
 912 {
 913         struct smbd_smb2_create_state *state = NULL;
 914         struct smbd_smb2_request *smb2req;
 915
 916         smb2req = find_open_smb2req(sconn, mid);
 917
 918         if (!smb2req) {
 919                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
 920                         (unsigned long long)mid));
 921                 return false;
 922         }
 923         if (!smb2req->subreq) {
 924                 return false;
 925         }
 926         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 927                 return false;
 928         }
 929         state = tevent_req_data(smb2req->subreq,
 930                         struct smbd_smb2_create_state);
 931         if (!state) {
 932                 return false;
 933         }
 934         /* It's not in progress if there's no timeout event. */
 935         if (!state->te) {
 936                 return false;
 937         }
 938
 939         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
 940                         (unsigned long long)mid));
 941
 942         return true;
 943 }
 944
 945 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
 946                                                         uint64_t mid)
 947 {
 948         struct smbd_smb2_create_state *state = NULL;
 949
 950         if (!smb2req->subreq) {
 951                 return;
 952         }
 953         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 954                 return;
 955         }
 956         state = tevent_req_data(smb2req->subreq,
 957                         struct smbd_smb2_create_state);
 958         if (!state) {
 959                 return;
 960         }
 961
 962         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
 963                 "mid %llu\n",
 964                 (unsigned long long)mid ));
 965
 966         /* Ensure we don't have any outstanding timer event. */
 967         TALLOC_FREE(state->te);
 968         /* Ensure we don't have any outstanding immediate event. */
 969         TALLOC_FREE(state->im);
 970 }
 971
 972 void remove_deferred_open_message_smb2(
 973         struct smbd_server_connection *sconn, uint64_t mid)
 974 {
 975         struct smbd_smb2_request *smb2req;
 976
 977         smb2req = find_open_smb2req(sconn, mid);
 978
 979         if (!smb2req) {
 980                 DEBUG(10,("remove_deferred_open_message_smb2: "
 981                         "can't find mid %llu\n",
 982                         (unsigned long long)mid ));
 983                 return;
 984         }
 985         remove_deferred_open_message_smb2_internal(smb2req, mid);
 986 }
 987
 988 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
 989                                         struct tevent_immediate *im,
 990                                         void *private_data)
 991 {
 992         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
 993                                         struct smbd_smb2_request);
 994         struct smbd_server_connection *sconn = smb2req->sconn;
 995         uint64_t mid = get_mid_from_smb2req(smb2req);
 996         NTSTATUS status;
 997
 998         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
 999                 "re-dispatching mid %llu\n",
1000                 (unsigned long long)mid ));
1001
1002         status = smbd_smb2_request_dispatch(smb2req);
1003         if (!NT_STATUS_IS_OK(status)) {
1004                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1005                 return;
1006         }
1007 }
1008
1009 bool schedule_deferred_open_message_smb2(
1010         struct smbd_server_connection *sconn, uint64_t mid)
1011 {
1012         struct smbd_smb2_create_state *state = NULL;
1013         struct smbd_smb2_request *smb2req;
1014
1015         smb2req = find_open_smb2req(sconn, mid);
1016
1017         if (!smb2req) {
1018                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1019                         "can't find mid %llu\n",
1020                         (unsigned long long)mid ));
1021                 return false;
1022         }
1023         if (!smb2req->subreq) {
1024                 return false;
1025         }
1026         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1027                 return false;
1028         }
1029         state = tevent_req_data(smb2req->subreq,
1030                         struct smbd_smb2_create_state);
1031         if (!state) {
1032                 return false;
1033         }
1034
1035         /* Ensure we don't have any outstanding timer event. */
1036         TALLOC_FREE(state->te);
1037         /* Ensure we don't have any outstanding immediate event. */
1038         TALLOC_FREE(state->im);
1039
1040         /*
1041          * This is subtle. We must null out the callback
1042          * before rescheduling, else the first call to
1043          * tevent_req_nterror() causes the _receive()
1044          * function to be called, this causing tevent_req_post()
1045          * to crash.
1046          */
1047         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1048
1049         state->im = tevent_create_immediate(smb2req);
1050         if (!state->im) {
1051                 smbd_server_connection_terminate(smb2req->sconn,
1052                         nt_errstr(NT_STATUS_NO_MEMORY));
1053                 return false;
1054         }
1055
1056         DEBUG(10,("schedule_deferred_open_message_smb2: "
1057                 "re-processing mid %llu\n",
1058                 (unsigned long long)mid ));
1059
1060         tevent_schedule_immediate(state->im,
1061                         smb2req->sconn->ev_ctx,
1062                         smbd_smb2_create_request_dispatch_immediate,
1063                         smb2req);
1064
1065         return true;
1066 }
1067
1068 /*********************************************************
1069  Re-process this call.
1070 *********************************************************/
1071
1072 static void smb2_deferred_open_timer(struct event_context *ev,
1073                                         struct timed_event *te,
1074                                         struct timeval _tval,
1075                                         void *private_data)
1076 {
1077         NTSTATUS status;
1078         struct smbd_smb2_create_state *state = NULL;
1079         struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1080                                                 struct smbd_smb2_request);
1081
1082         DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1083                 smb2req->current_idx,
1084                 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1085
1086         state = tevent_req_data(smb2req->subreq,
1087                         struct smbd_smb2_create_state);
1088         if (!state) {
1089                 return;
1090         }
1091         /*
1092          * Null this out, don't talloc_free. It will
1093          * be talloc_free'd by the tevent library when
1094          * this returns.
1095          */
1096         state->te = NULL;
1097         /* Ensure we don't have any outstanding immediate event. */
1098         TALLOC_FREE(state->im);
1099
1100         /*
1101          * This is subtle. We must null out the callback
1102          * before rescheduling, else the first call to
1103          * tevent_req_nterror() causes the _receive()
1104          * function to be called, this causing tevent_req_post()
1105          * to crash.
1106          */
1107         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1108
1109         status = smbd_smb2_request_dispatch(smb2req);
1110
1111         if (!NT_STATUS_IS_OK(status)) {
1112                 smbd_server_connection_terminate(smb2req->sconn,
1113                                 nt_errstr(status));
1114         }
1115 }
1116
1117 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1118 {
1119         struct smbd_smb2_request *smb2req = NULL;
1120         struct smbd_smb2_create_state *state = tevent_req_data(req,
1121                                 struct smbd_smb2_create_state);
1122         uint64_t mid;
1123
1124         if (!state) {
1125                 return false;
1126         }
1127
1128         if (!state->smb2req) {
1129                 return false;
1130         }
1131
1132         smb2req = state->smb2req;
1133         mid = get_mid_from_smb2req(smb2req);
1134
1135         if (is_deferred_open_async(state->private_data.data)) {
1136                 /* Can't cancel an async create. */
1137                 return false;
1138         }
1139
1140         remove_deferred_open_entry(state->id, mid,
1141                                    messaging_server_id(smb2req->sconn->msg_ctx));
1142         remove_deferred_open_message_smb2_internal(smb2req, mid);
1143         smb2req->cancelled = true;
1144
1145         tevent_req_done(req);
1146         return true;
1147 }
1148
1149 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1150                                 struct timeval request_time,
1151                                 struct timeval timeout,
1152                                 struct file_id id,
1153                                 char *private_data,
1154                                 size_t priv_len)
1155 {
1156         struct tevent_req *req = NULL;
1157         struct smbd_smb2_create_state *state = NULL;
1158         struct timeval end_time;
1159
1160         if (!smb2req) {
1161                 return false;
1162         }
1163         req = smb2req->subreq;
1164         if (!req) {
1165                 return false;
1166         }
1167         state = tevent_req_data(req, struct smbd_smb2_create_state);
1168         if (!state) {
1169                 return false;
1170         }
1171         state->id = id;
1172         state->request_time = request_time;
1173         state->private_data = data_blob_talloc(state, private_data,
1174                                                 priv_len);
1175         if (!state->private_data.data) {
1176                 return false;
1177         }
1178
1179         /* Re-schedule us to retry on timer expiry. */
1180         end_time = timeval_sum(&request_time, &timeout);
1181
1182         DEBUG(10,("push_deferred_open_message_smb2: "
1183                 "timeout at %s\n",
1184                 timeval_string(talloc_tos(),
1185                                 &end_time,
1186                                 true) ));
1187
1188         state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1189                                 state,
1190                                 end_time,
1191                                 smb2_deferred_open_timer,
1192                                 smb2req);
1193         if (!state->te) {
1194                 return false;
1195         }
1196
1197         /* allow this request to be canceled */
1198         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1199
1200         return true;
1201 }