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         int i = smb2req->current_idx;
 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 = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
 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 + smb2req->in.vector[i+1].iov_len;
 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         if (name_offset > smb2req->in.vector[i+2].iov_len) {
 167                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 168         }
 169
 170         name_available_length = smb2req->in.vector[i+2].iov_len - name_offset;
 171
 172         if (in_name_length > name_available_length) {
 173                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 174         }
 175
 176         in_name_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
 177                               name_offset;
 178         in_name_buffer.length = in_name_length;
 179
 180         if (in_context_offset == 0 && in_context_length == 0) {
 181                 /* This is ok */
 182                 context_offset = 0;
 183         } else if (in_context_offset < dyn_offset) {
 184                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 185         } else {
 186                 context_offset = in_context_offset - dyn_offset;
 187         }
 188
 189         if (context_offset > smb2req->in.vector[i+2].iov_len) {
 190                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 191         }
 192
 193         context_available_length = smb2req->in.vector[i+2].iov_len - context_offset;
 194
 195         if (in_context_length > context_available_length) {
 196                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 197         }
 198
 199         in_context_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
 200                                   context_offset;
 201         in_context_buffer.length = in_context_length;
 202
 203         /*
 204          * Now interpret the name and context buffers
 205          */
 206
 207         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 208                                    in_name_buffer.data,
 209                                    in_name_buffer.length,
 210                                    &in_name_string,
 211                                    &in_name_string_size);
 212         if (!ok) {
 213                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 214         }
 215
 216         if (in_name_buffer.length == 0) {
 217                 in_name_string_size = 0;
 218         }
 219
 220         if (strlen(in_name_string) != in_name_string_size) {
 221                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 222         }
 223
 224         ZERO_STRUCT(in_context_blobs);
 225         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 226         if (!NT_STATUS_IS_OK(status)) {
 227                 return smbd_smb2_request_error(smb2req, status);
 228         }
 229
 230         tsubreq = smbd_smb2_create_send(smb2req,
 231                                        smb2req->sconn->ev_ctx,
 232                                        smb2req,
 233                                        in_oplock_level,
 234                                        in_impersonation_level,
 235                                        in_desired_access,
 236                                        in_file_attributes,
 237                                        in_share_access,
 238                                        in_create_disposition,
 239                                        in_create_options,
 240                                        in_name_string,
 241                                        in_context_blobs);
 242         if (tsubreq == NULL) {
 243                 smb2req->subreq = NULL;
 244                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 245         }
 246         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 247
 248         /*
 249          * For now we keep the logic that we do not send STATUS_PENDING
 250          * for sharing violations, so we just wait 2 seconds.
 251          *
 252          * TODO: we need more tests for this.
 253          */
 254         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 255 }
 256
 257 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 258 {
 259         uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
 260         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 261 }
 262
 263 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 264 {
 265         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 266                                         struct smbd_smb2_request);
 267         int i = smb2req->current_idx;
 268         uint8_t *outhdr;
 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         outhdr = (uint8_t *)smb2req->out.vector[i].iov_base;
 341
 342         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 343         if (outbody.data == NULL) {
 344                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 345                 if (!NT_STATUS_IS_OK(error)) {
 346                         smbd_server_connection_terminate(smb2req->sconn,
 347                                                          nt_errstr(error));
 348                         return;
 349                 }
 350                 return;
 351         }
 352
 353         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 354         SCVAL(outbody.data, 0x02,
 355               out_oplock_level);                /* oplock level */
 356         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 357         SIVAL(outbody.data, 0x04,
 358               out_create_action);               /* create action */
 359         SBVAL(outbody.data, 0x08,
 360               out_creation_time);               /* creation time */
 361         SBVAL(outbody.data, 0x10,
 362               out_last_access_time);            /* last access time */
 363         SBVAL(outbody.data, 0x18,
 364               out_last_write_time);             /* last write time */
 365         SBVAL(outbody.data, 0x20,
 366               out_change_time);                 /* change time */
 367         SBVAL(outbody.data, 0x28,
 368               out_allocation_size);             /* allocation size */
 369         SBVAL(outbody.data, 0x30,
 370               out_end_of_file);                 /* end of file */
 371         SIVAL(outbody.data, 0x38,
 372               out_file_attributes);             /* file attributes */
 373         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 374         SBVAL(outbody.data, 0x40,
 375               out_file_id_persistent);          /* file id (persistent) */
 376         SBVAL(outbody.data, 0x48,
 377               out_file_id_volatile);            /* file id (volatile) */
 378         SIVAL(outbody.data, 0x50,
 379               out_context_buffer_offset);       /* create contexts offset */
 380         SIVAL(outbody.data, 0x54,
 381               out_context_buffer.length);       /* create contexts length */
 382
 383         outdyn = out_context_buffer;
 384
 385         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 386         if (!NT_STATUS_IS_OK(error)) {
 387                 smbd_server_connection_terminate(smb2req->sconn,
 388                                                  nt_errstr(error));
 389                 return;
 390         }
 391 }
 392
 393 struct smbd_smb2_create_state {
 394         struct smbd_smb2_request *smb2req;
 395         struct smb_request *smb1req;
 396         struct timed_event *te;
 397         struct tevent_immediate *im;
 398         struct timeval request_time;
 399         struct file_id id;
 400         DATA_BLOB private_data;
 401         uint8_t out_oplock_level;
 402         uint32_t out_create_action;
 403         NTTIME out_creation_time;
 404         NTTIME out_last_access_time;
 405         NTTIME out_last_write_time;
 406         NTTIME out_change_time;
 407         uint64_t out_allocation_size;
 408         uint64_t out_end_of_file;
 409         uint32_t out_file_attributes;
 410         uint64_t out_file_id_persistent;
 411         uint64_t out_file_id_volatile;
 412         struct smb2_create_blobs out_context_blobs;
 413 };
 414
 415 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 416                         struct tevent_context *ev,
 417                         struct smbd_smb2_request *smb2req,
 418                         uint8_t in_oplock_level,
 419                         uint32_t in_impersonation_level,
 420                         uint32_t in_desired_access,
 421                         uint32_t in_file_attributes,
 422                         uint32_t in_share_access,
 423                         uint32_t in_create_disposition,
 424                         uint32_t in_create_options,
 425                         const char *in_name,
 426                         struct smb2_create_blobs in_context_blobs)
 427 {
 428         struct tevent_req *req = NULL;
 429         struct smbd_smb2_create_state *state = NULL;
 430         NTSTATUS status;
 431         struct smb_request *smb1req = NULL;
 432         files_struct *result = NULL;
 433         int info;
 434         struct timespec write_time_ts;
 435         struct smb2_create_blobs out_context_blobs;
 436         int requested_oplock_level;
 437
 438         ZERO_STRUCT(out_context_blobs);
 439
 440         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
 441                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 442         } else {
 443                 requested_oplock_level = in_oplock_level;
 444         }
 445
 446
 447         if (smb2req->subreq == NULL) {
 448                 /* New create call. */
 449                 req = tevent_req_create(mem_ctx, &state,
 450                                 struct smbd_smb2_create_state);
 451                 if (req == NULL) {
 452                         return NULL;
 453                 }
 454                 state->smb2req = smb2req;
 455
 456                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 457                 if (tevent_req_nomem(smb1req, req)) {
 458                         return tevent_req_post(req, ev);
 459                 }
 460                 state->smb1req = smb1req;
 461                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 462                         in_name));
 463         } else {
 464                 /* Re-entrant create call. */
 465                 req = smb2req->subreq;
 466                 state = tevent_req_data(req,
 467                                 struct smbd_smb2_create_state);
 468                 smb1req = state->smb1req;
 469                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 470                         in_name ));
 471         }
 472
 473         if (IS_IPC(smb1req->conn)) {
 474                 const char *pipe_name = in_name;
 475
 476                 if (!lp_nt_pipe_support()) {
 477                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 478                         return tevent_req_post(req, ev);
 479                 }
 480
 481                 /* Strip \\ off the name. */
 482                 if (pipe_name[0] == '\\') {
 483                         pipe_name++;
 484                 }
 485
 486                 status = open_np_file(smb1req, pipe_name, &result);
 487                 if (!NT_STATUS_IS_OK(status)) {
 488                         tevent_req_nterror(req, status);
 489                         return tevent_req_post(req, ev);
 490                 }
 491                 info = FILE_WAS_OPENED;
 492         } else if (CAN_PRINT(smb1req->conn)) {
 493                 status = file_new(smb1req, smb1req->conn, &result);
 494                 if(!NT_STATUS_IS_OK(status)) {
 495                         tevent_req_nterror(req, status);
 496                         return tevent_req_post(req, ev);
 497                 }
 498
 499                 status = print_spool_open(result, in_name,
 500                                           smb1req->vuid);
 501                 if (!NT_STATUS_IS_OK(status)) {
 502                         file_free(smb1req, result);
 503                         tevent_req_nterror(req, status);
 504                         return tevent_req_post(req, ev);
 505                 }
 506                 info = FILE_WAS_CREATED;
 507         } else {
 508                 char *fname;
 509                 struct smb_filename *smb_fname = NULL;
 510                 struct smb2_create_blob *exta = NULL;
 511                 struct ea_list *ea_list = NULL;
 512                 struct smb2_create_blob *mxac = NULL;
 513                 NTTIME max_access_time = 0;
 514                 struct smb2_create_blob *secd = NULL;
 515                 struct security_descriptor *sec_desc = NULL;
 516                 struct smb2_create_blob *dhnq = NULL;
 517                 struct smb2_create_blob *dhnc = NULL;
 518                 struct smb2_create_blob *alsi = NULL;
 519                 uint64_t allocation_size = 0;
 520                 struct smb2_create_blob *twrp = NULL;
 521                 struct smb2_create_blob *qfid = NULL;
 522
 523                 exta = smb2_create_blob_find(&in_context_blobs,
 524                                              SMB2_CREATE_TAG_EXTA);
 525                 mxac = smb2_create_blob_find(&in_context_blobs,
 526                                              SMB2_CREATE_TAG_MXAC);
 527                 secd = smb2_create_blob_find(&in_context_blobs,
 528                                              SMB2_CREATE_TAG_SECD);
 529                 dhnq = smb2_create_blob_find(&in_context_blobs,
 530                                              SMB2_CREATE_TAG_DHNQ);
 531                 dhnc = smb2_create_blob_find(&in_context_blobs,
 532                                              SMB2_CREATE_TAG_DHNC);
 533                 alsi = smb2_create_blob_find(&in_context_blobs,
 534                                              SMB2_CREATE_TAG_ALSI);
 535                 twrp = smb2_create_blob_find(&in_context_blobs,
 536                                              SMB2_CREATE_TAG_TWRP);
 537                 qfid = smb2_create_blob_find(&in_context_blobs,
 538                                              SMB2_CREATE_TAG_QFID);
 539
 540                 fname = talloc_strdup(state, in_name);
 541                 if (tevent_req_nomem(fname, req)) {
 542                         return tevent_req_post(req, ev);
 543                 }
 544
 545                 if (exta) {
 546                         if (dhnc) {
 547                                 tevent_req_nterror(req,NT_STATUS_OBJECT_NAME_NOT_FOUND);
 548                                 return tevent_req_post(req, ev);
 549                         }
 550
 551                         ea_list = read_nttrans_ea_list(mem_ctx,
 552                                 (const char *)exta->data.data, exta->data.length);
 553                         if (!ea_list) {
 554                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 555                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 556                                 return tevent_req_post(req, ev);
 557                         }
 558                 }
 559
 560                 if (mxac) {
 561                         if (dhnc) {
 562                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 563                                 return tevent_req_post(req, ev);
 564                         }
 565
 566                         if (mxac->data.length == 0) {
 567                                 max_access_time = 0;
 568                         } else if (mxac->data.length == 8) {
 569                                 max_access_time = BVAL(mxac->data.data, 0);
 570                         } else {
 571                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 572                                 return tevent_req_post(req, ev);
 573                         }
 574                 }
 575
 576                 if (secd) {
 577                         enum ndr_err_code ndr_err;
 578
 579                         if (dhnc) {
 580                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 581                                 return tevent_req_post(req, ev);
 582                         }
 583
 584                         sec_desc = talloc_zero(state, struct security_descriptor);
 585                         if (tevent_req_nomem(sec_desc, req)) {
 586                                 return tevent_req_post(req, ev);
 587                         }
 588
 589                         ndr_err = ndr_pull_struct_blob(&secd->data,
 590                                 sec_desc, sec_desc,
 591                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 592                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 593                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 594                                          ndr_errstr(ndr_err)));
 595                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 596                                 return tevent_req_post(req, ev);
 597                         }
 598                 }
 599
 600                 if (dhnq) {
 601                         if (dhnc) {
 602                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 603                                 return tevent_req_post(req, ev);
 604                         }
 605
 606                         if (dhnq->data.length != 16) {
 607                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 608                                 return tevent_req_post(req, ev);
 609                         }
 610                         /*
 611                          * we don't support durable handles yet
 612                          * and have to ignore this
 613                          */
 614                 }
 615
 616                 if (dhnc) {
 617                         if (dhnc->data.length != 16) {
 618                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 619                                 return tevent_req_post(req, ev);
 620                         }
 621                         /* we don't support durable handles yet */
 622                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 623                         return tevent_req_post(req, ev);
 624                 }
 625
 626                 if (alsi) {
 627                         if (dhnc) {
 628                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 629                                 return tevent_req_post(req, ev);
 630                         }
 631
 632                         if (alsi->data.length != 8) {
 633                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 634                                 return tevent_req_post(req, ev);
 635                         }
 636                         allocation_size = BVAL(alsi->data.data, 0);
 637                 }
 638
 639                 if (twrp) {
 640                         NTTIME nttime;
 641                         time_t t;
 642                         struct tm *tm;
 643
 644                         if (dhnc) {
 645                                 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 646                                 return tevent_req_post(req, ev);
 647                         }
 648
 649                         if (twrp->data.length != 8) {
 650                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 651                                 return tevent_req_post(req, ev);
 652                         }
 653
 654                         nttime = BVAL(twrp->data.data, 0);
 655                         t = nt_time_to_unix(nttime);
 656                         tm = gmtime(&t);
 657
 658                         TALLOC_FREE(fname);
 659                         fname = talloc_asprintf(state,
 660                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 661                                         tm->tm_year + 1900,
 662                                         tm->tm_mon + 1,
 663                                         tm->tm_mday,
 664                                         tm->tm_hour,
 665                                         tm->tm_min,
 666                                         tm->tm_sec,
 667                                         in_name);
 668                         if (tevent_req_nomem(fname, req)) {
 669                                 return tevent_req_post(req, ev);
 670                         }
 671                 }
 672
 673                 if (qfid) {
 674                         if (qfid->data.length != 0) {
 675                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 676                                 return tevent_req_post(req, ev);
 677                         }
 678                 }
 679
 680                 /* these are ignored for SMB2 */
 681                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 682                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 683
 684                 /*
 685                  * For a DFS path the function parse_dfs_path()
 686                  * will do the path processing.
 687                  */
 688
 689                 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 690                         /* convert '\\' into '/' */
 691                         status = check_path_syntax(fname);
 692                         if (!NT_STATUS_IS_OK(status)) {
 693                                 tevent_req_nterror(req, status);
 694                                 return tevent_req_post(req, ev);
 695                         }
 696                 }
 697
 698                 status = filename_convert(req,
 699                                           smb1req->conn,
 700                                           smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 701                                           fname,
 702                                           0,
 703                                           NULL,
 704                                           &smb_fname);
 705                 if (!NT_STATUS_IS_OK(status)) {
 706                         tevent_req_nterror(req, status);
 707                         return tevent_req_post(req, ev);
 708                 }
 709
 710                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 711
 712                 status = SMB_VFS_CREATE_FILE(smb1req->conn,
 713                                              smb1req,
 714                                              0, /* root_dir_fid */
 715                                              smb_fname,
 716                                              in_desired_access,
 717                                              in_share_access,
 718                                              in_create_disposition,
 719                                              in_create_options,
 720                                              in_file_attributes,
 721                                              map_smb2_oplock_levels_to_samba(requested_oplock_level),
 722                                              allocation_size,
 723                                              0, /* private_flags */
 724                                              sec_desc,
 725                                              ea_list,
 726                                              &result,
 727                                              &info);
 728                 if (!NT_STATUS_IS_OK(status)) {
 729                         if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 730                                 return req;
 731                         }
 732                         tevent_req_nterror(req, status);
 733                         return tevent_req_post(req, ev);
 734                 }
 735
 736                 if (mxac) {
 737                         NTTIME last_write_time;
 738
 739                         unix_timespec_to_nt_time(&last_write_time,
 740                                                  result->fsp_name->st.st_ex_mtime);
 741                         if (last_write_time != max_access_time) {
 742                                 uint8_t p[8];
 743                                 uint32_t max_access_granted;
 744                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 745
 746                                 status = smbd_calculate_access_mask(smb1req->conn,
 747                                                         result->fsp_name,
 748                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 749                                                         &max_access_granted);
 750
 751                                 SIVAL(p, 0, NT_STATUS_V(status));
 752                                 SIVAL(p, 4, max_access_granted);
 753
 754                                 status = smb2_create_blob_add(state,
 755                                                         &out_context_blobs,
 756                                                         SMB2_CREATE_TAG_MXAC,
 757                                                         blob);
 758                                 if (!NT_STATUS_IS_OK(status)) {
 759                                         tevent_req_nterror(req, status);
 760                                         return tevent_req_post(req, ev);
 761                                 }
 762                         }
 763                 }
 764
 765                 if (qfid) {
 766                         uint8_t p[32];
 767                         uint64_t file_index = get_FileIndex(result->conn,
 768                                                         &result->fsp_name->st);
 769                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 770
 771                         ZERO_STRUCT(p);
 772
 773                         /* From conversations with Microsoft engineers at
 774                            the MS plugfest. The first 8 bytes are the "volume index"
 775                            == inode, the second 8 bytes are the "volume id",
 776                            == dev. This will be updated in the SMB2 doc. */
 777                         SBVAL(p, 0, file_index);
 778                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
 779
 780                         status = smb2_create_blob_add(state, &out_context_blobs,
 781                                                       SMB2_CREATE_TAG_QFID,
 782                                                       blob);
 783                         if (!NT_STATUS_IS_OK(status)) {
 784                                 tevent_req_nterror(req, status);
 785                                 return tevent_req_post(req, ev);
 786                         }
 787                 }
 788         }
 789
 790         smb2req->compat_chain_fsp = smb1req->chain_fsp;
 791
 792         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
 793                 state->out_oplock_level = in_oplock_level;
 794         } else {
 795                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
 796         }
 797
 798         if ((in_create_disposition == FILE_SUPERSEDE)
 799             && (info == FILE_WAS_OVERWRITTEN)) {
 800                 state->out_create_action = FILE_WAS_SUPERSEDED;
 801         } else {
 802                 state->out_create_action = info;
 803         }
 804         state->out_file_attributes = dos_mode(result->conn,
 805                                            result->fsp_name);
 806         /* Deal with other possible opens having a modified
 807            write time. JRA. */
 808         ZERO_STRUCT(write_time_ts);
 809         get_file_infos(result->file_id, 0, NULL, &write_time_ts);
 810         if (!null_timespec(write_time_ts)) {
 811                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
 812         }
 813
 814         unix_timespec_to_nt_time(&state->out_creation_time,
 815                         get_create_timespec(smb1req->conn, result,
 816                                         result->fsp_name));
 817         unix_timespec_to_nt_time(&state->out_last_access_time,
 818                         result->fsp_name->st.st_ex_atime);
 819         unix_timespec_to_nt_time(&state->out_last_write_time,
 820                         result->fsp_name->st.st_ex_mtime);
 821         unix_timespec_to_nt_time(&state->out_change_time,
 822                         get_change_timespec(smb1req->conn, result,
 823                                         result->fsp_name));
 824         state->out_allocation_size =
 825                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
 826                                                &(result->fsp_name->st));
 827         state->out_end_of_file = result->fsp_name->st.st_ex_size;
 828         if (state->out_file_attributes == 0) {
 829                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 830         }
 831         state->out_file_id_persistent = result->fnum;
 832         state->out_file_id_volatile = result->fnum;
 833         state->out_context_blobs = out_context_blobs;
 834
 835         tevent_req_done(req);
 836         return tevent_req_post(req, ev);
 837 }
 838
 839 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 840                         TALLOC_CTX *mem_ctx,
 841                         uint8_t *out_oplock_level,
 842                         uint32_t *out_create_action,
 843                         NTTIME *out_creation_time,
 844                         NTTIME *out_last_access_time,
 845                         NTTIME *out_last_write_time,
 846                         NTTIME *out_change_time,
 847                         uint64_t *out_allocation_size,
 848                         uint64_t *out_end_of_file,
 849                         uint32_t *out_file_attributes,
 850                         uint64_t *out_file_id_persistent,
 851                         uint64_t *out_file_id_volatile,
 852                         struct smb2_create_blobs *out_context_blobs)
 853 {
 854         NTSTATUS status;
 855         struct smbd_smb2_create_state *state = tevent_req_data(req,
 856                                                struct smbd_smb2_create_state);
 857
 858         if (tevent_req_is_nterror(req, &status)) {
 859                 tevent_req_received(req);
 860                 return status;
 861         }
 862
 863         *out_oplock_level       = state->out_oplock_level;
 864         *out_create_action      = state->out_create_action;
 865         *out_creation_time      = state->out_creation_time;
 866         *out_last_access_time   = state->out_last_access_time;
 867         *out_last_write_time    = state->out_last_write_time;
 868         *out_change_time        = state->out_change_time;
 869         *out_allocation_size    = state->out_allocation_size;
 870         *out_end_of_file        = state->out_end_of_file;
 871         *out_file_attributes    = state->out_file_attributes;
 872         *out_file_id_persistent = state->out_file_id_persistent;
 873         *out_file_id_volatile   = state->out_file_id_volatile;
 874         *out_context_blobs      = state->out_context_blobs;
 875
 876         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
 877
 878         tevent_req_received(req);
 879         return NT_STATUS_OK;
 880 }
 881
 882 /*********************************************************
 883  Code for dealing with deferred opens.
 884 *********************************************************/
 885
 886 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 887                         struct timeval *p_request_time,
 888                         void **pp_state)
 889 {
 890         struct smbd_smb2_create_state *state = NULL;
 891         struct tevent_req *req = NULL;
 892
 893         if (!smb2req) {
 894                 return false;
 895         }
 896         if (smb2req->subreq == NULL) {
 897                 return false;
 898         }
 899         req = smb2req->subreq;
 900         if (!req) {
 901                 return false;
 902         }
 903         state = tevent_req_data(req, struct smbd_smb2_create_state);
 904         if (!state) {
 905                 return false;
 906         }
 907         if (p_request_time) {
 908                 *p_request_time = state->request_time;
 909         }
 910         if (pp_state) {
 911                 *pp_state = (void *)state->private_data.data;
 912         }
 913         return true;
 914 }
 915
 916 /*********************************************************
 917  Re-process this call early - requested by message or
 918  close.
 919 *********************************************************/
 920
 921 static struct smbd_smb2_request *find_open_smb2req(
 922         struct smbd_server_connection *sconn, uint64_t mid)
 923 {
 924         struct smbd_smb2_request *smb2req;
 925
 926         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
 927                 uint64_t message_id;
 928                 if (smb2req->subreq == NULL) {
 929                         /* This message has been processed. */
 930                         continue;
 931                 }
 932                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
 933                         /* This message has been processed. */
 934                         continue;
 935                 }
 936                 message_id = get_mid_from_smb2req(smb2req);
 937                 if (message_id == mid) {
 938                         return smb2req;
 939                 }
 940         }
 941         return NULL;
 942 }
 943
 944 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
 945 {
 946         struct smbd_smb2_create_state *state = NULL;
 947         struct smbd_smb2_request *smb2req;
 948
 949         smb2req = find_open_smb2req(sconn, mid);
 950
 951         if (!smb2req) {
 952                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
 953                         (unsigned long long)mid));
 954                 return false;
 955         }
 956         if (!smb2req->subreq) {
 957                 return false;
 958         }
 959         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 960                 return false;
 961         }
 962         state = tevent_req_data(smb2req->subreq,
 963                         struct smbd_smb2_create_state);
 964         if (!state) {
 965                 return false;
 966         }
 967         /* It's not in progress if there's no timeout event. */
 968         if (!state->te) {
 969                 return false;
 970         }
 971
 972         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
 973                         (unsigned long long)mid));
 974
 975         return true;
 976 }
 977
 978 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
 979                                                         uint64_t mid)
 980 {
 981         struct smbd_smb2_create_state *state = NULL;
 982
 983         if (!smb2req->subreq) {
 984                 return;
 985         }
 986         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 987                 return;
 988         }
 989         state = tevent_req_data(smb2req->subreq,
 990                         struct smbd_smb2_create_state);
 991         if (!state) {
 992                 return;
 993         }
 994
 995         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
 996                 "mid %llu\n",
 997                 (unsigned long long)mid ));
 998
 999         /* Ensure we don't have any outstanding timer event. */
1000         TALLOC_FREE(state->te);
1001         /* Ensure we don't have any outstanding immediate event. */
1002         TALLOC_FREE(state->im);
1003 }
1004
1005 void remove_deferred_open_message_smb2(
1006         struct smbd_server_connection *sconn, uint64_t mid)
1007 {
1008         struct smbd_smb2_request *smb2req;
1009
1010         smb2req = find_open_smb2req(sconn, mid);
1011
1012         if (!smb2req) {
1013                 DEBUG(10,("remove_deferred_open_message_smb2: "
1014                         "can't find mid %llu\n",
1015                         (unsigned long long)mid ));
1016                 return;
1017         }
1018         remove_deferred_open_message_smb2_internal(smb2req, mid);
1019 }
1020
1021 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1022                                         struct tevent_immediate *im,
1023                                         void *private_data)
1024 {
1025         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1026                                         struct smbd_smb2_request);
1027         struct smbd_server_connection *sconn = smb2req->sconn;
1028         uint64_t mid = get_mid_from_smb2req(smb2req);
1029         NTSTATUS status;
1030
1031         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1032                 "re-dispatching mid %llu\n",
1033                 (unsigned long long)mid ));
1034
1035         status = smbd_smb2_request_dispatch(smb2req);
1036         if (!NT_STATUS_IS_OK(status)) {
1037                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1038                 return;
1039         }
1040 }
1041
1042 void schedule_deferred_open_message_smb2(
1043         struct smbd_server_connection *sconn, uint64_t mid)
1044 {
1045         struct smbd_smb2_create_state *state = NULL;
1046         struct smbd_smb2_request *smb2req;
1047
1048         smb2req = find_open_smb2req(sconn, mid);
1049
1050         if (!smb2req) {
1051                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1052                         "can't find mid %llu\n",
1053                         (unsigned long long)mid ));
1054                 return;
1055         }
1056         if (!smb2req->subreq) {
1057                 return;
1058         }
1059         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1060                 return;
1061         }
1062         state = tevent_req_data(smb2req->subreq,
1063                         struct smbd_smb2_create_state);
1064         if (!state) {
1065                 return;
1066         }
1067
1068         /* Ensure we don't have any outstanding timer event. */
1069         TALLOC_FREE(state->te);
1070         /* Ensure we don't have any outstanding immediate event. */
1071         TALLOC_FREE(state->im);
1072
1073         /*
1074          * This is subtle. We must null out the callback
1075          * before resheduling, else the first call to
1076          * tevent_req_nterror() causes the _receive()
1077          * function to be called, this causing tevent_req_post()
1078          * to crash.
1079          */
1080         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1081
1082         state->im = tevent_create_immediate(smb2req);
1083         if (!state->im) {
1084                 smbd_server_connection_terminate(smb2req->sconn,
1085                         nt_errstr(NT_STATUS_NO_MEMORY));
1086                 return;
1087         }
1088
1089         DEBUG(10,("schedule_deferred_open_message_smb2: "
1090                 "re-processing mid %llu\n",
1091                 (unsigned long long)mid ));
1092
1093         tevent_schedule_immediate(state->im,
1094                         smb2req->sconn->ev_ctx,
1095                         smbd_smb2_create_request_dispatch_immediate,
1096                         smb2req);
1097 }
1098
1099 /*********************************************************
1100  Re-process this call.
1101 *********************************************************/
1102
1103 static void smb2_deferred_open_timer(struct event_context *ev,
1104                                         struct timed_event *te,
1105                                         struct timeval _tval,
1106                                         void *private_data)
1107 {
1108         NTSTATUS status;
1109         struct smbd_smb2_create_state *state = NULL;
1110         struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1111                                                 struct smbd_smb2_request);
1112
1113         DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1114                 smb2req->current_idx,
1115                 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1116
1117         state = tevent_req_data(smb2req->subreq,
1118                         struct smbd_smb2_create_state);
1119         if (!state) {
1120                 return;
1121         }
1122         /*
1123          * Null this out, don't talloc_free. It will
1124          * be talloc_free'd by the tevent library when
1125          * this returns.
1126          */
1127         state->te = NULL;
1128         /* Ensure we don't have any outstanding immediate event. */
1129         TALLOC_FREE(state->im);
1130
1131         /*
1132          * This is subtle. We must null out the callback
1133          * before resheduling, else the first call to
1134          * tevent_req_nterror() causes the _receive()
1135          * function to be called, this causing tevent_req_post()
1136          * to crash.
1137          */
1138         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1139
1140         status = smbd_smb2_request_dispatch(smb2req);
1141
1142         if (!NT_STATUS_IS_OK(status)) {
1143                 smbd_server_connection_terminate(smb2req->sconn,
1144                                 nt_errstr(status));
1145         }
1146 }
1147
1148 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1149 {
1150         struct smbd_smb2_request *smb2req = NULL;
1151         struct smbd_smb2_create_state *state = tevent_req_data(req,
1152                                 struct smbd_smb2_create_state);
1153         uint64_t mid;
1154
1155         if (!state) {
1156                 return false;
1157         }
1158
1159         if (!state->smb2req) {
1160                 return false;
1161         }
1162
1163         smb2req = state->smb2req;
1164         mid = get_mid_from_smb2req(smb2req);
1165
1166         remove_deferred_open_entry(state->id, mid,
1167                                    messaging_server_id(smb2req->sconn->msg_ctx));
1168         remove_deferred_open_message_smb2_internal(smb2req, mid);
1169         smb2req->cancelled = true;
1170
1171         tevent_req_done(req);
1172         return true;
1173 }
1174
1175 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1176                                 struct timeval request_time,
1177                                 struct timeval timeout,
1178                                 struct file_id id,
1179                                 char *private_data,
1180                                 size_t priv_len)
1181 {
1182         struct tevent_req *req = NULL;
1183         struct smbd_smb2_create_state *state = NULL;
1184         struct timeval end_time;
1185
1186         if (!smb2req) {
1187                 return false;
1188         }
1189         req = smb2req->subreq;
1190         if (!req) {
1191                 return false;
1192         }
1193         state = tevent_req_data(req, struct smbd_smb2_create_state);
1194         if (!state) {
1195                 return false;
1196         }
1197         state->id = id;
1198         state->request_time = request_time;
1199         state->private_data = data_blob_talloc(state, private_data,
1200                                                 priv_len);
1201         if (!state->private_data.data) {
1202                 return false;
1203         }
1204
1205         /* Re-schedule us to retry on timer expiry. */
1206         end_time = timeval_sum(&request_time, &timeout);
1207
1208         DEBUG(10,("push_deferred_open_message_smb2: "
1209                 "timeout at %s\n",
1210                 timeval_string(talloc_tos(),
1211                                 &end_time,
1212                                 true) ));
1213
1214         state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1215                                 state,
1216                                 end_time,
1217                                 smb2_deferred_open_timer,
1218                                 smb2req);
1219         if (!state->te) {
1220                 return false;
1221         }
1222
1223         /* allow this request to be canceled */
1224         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1225
1226         return true;
1227 }