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 "../librpc/gen_ndr/ndr_smb2_lease_struct.h"
  29 #include "../lib/util/tevent_ntstatus.h"
  30 #include "messages.h"
  31
  32 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  33 {
  34         switch(in_oplock_level) {
  35         case SMB2_OPLOCK_LEVEL_NONE:
  36                 return NO_OPLOCK;
  37         case SMB2_OPLOCK_LEVEL_II:
  38                 return LEVEL_II_OPLOCK;
  39         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  40                 return EXCLUSIVE_OPLOCK;
  41         case SMB2_OPLOCK_LEVEL_BATCH:
  42                 return BATCH_OPLOCK;
  43         case SMB2_OPLOCK_LEVEL_LEASE:
  44                 return LEASE_OPLOCK;
  45         default:
  46                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  47                         "unknown level %u\n",
  48                         (unsigned int)in_oplock_level));
  49                 return NO_OPLOCK;
  50         }
  51 }
  52
  53 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  54 {
  55         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  56                 return SMB2_OPLOCK_LEVEL_BATCH;
  57         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  58                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  59         } else if (oplock_type == LEVEL_II_OPLOCK) {
  60                 return SMB2_OPLOCK_LEVEL_II;
  61         } else if (oplock_type == LEASE_OPLOCK) {
  62                 return SMB2_OPLOCK_LEVEL_LEASE;
  63         } else {
  64                 return SMB2_OPLOCK_LEVEL_NONE;
  65         }
  66 }
  67
  68 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  69                         struct tevent_context *ev,
  70                         struct smbd_smb2_request *smb2req,
  71                         uint8_t in_oplock_level,
  72                         uint32_t in_impersonation_level,
  73                         uint32_t in_desired_access,
  74                         uint32_t in_file_attributes,
  75                         uint32_t in_share_access,
  76                         uint32_t in_create_disposition,
  77                         uint32_t in_create_options,
  78                         const char *in_name,
  79                         struct smb2_create_blobs in_context_blobs);
  80 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  81                         TALLOC_CTX *mem_ctx,
  82                         uint8_t *out_oplock_level,
  83                         uint32_t *out_create_action,
  84                         struct timespec *out_creation_ts,
  85                         struct timespec *out_last_access_ts,
  86                         struct timespec *out_last_write_ts,
  87                         struct timespec *out_change_ts,
  88                         uint64_t *out_allocation_size,
  89                         uint64_t *out_end_of_file,
  90                         uint32_t *out_file_attributes,
  91                         uint64_t *out_file_id_persistent,
  92                         uint64_t *out_file_id_volatile,
  93                         struct smb2_create_blobs *out_context_blobs);
  94
  95 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
  96 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
  97 {
  98         const uint8_t *inbody;
  99         const struct iovec *indyniov;
 100         uint8_t in_oplock_level;
 101         uint32_t in_impersonation_level;
 102         uint32_t in_desired_access;
 103         uint32_t in_file_attributes;
 104         uint32_t in_share_access;
 105         uint32_t in_create_disposition;
 106         uint32_t in_create_options;
 107         uint16_t in_name_offset;
 108         uint16_t in_name_length;
 109         DATA_BLOB in_name_buffer;
 110         char *in_name_string;
 111         size_t in_name_string_size;
 112         uint32_t name_offset = 0;
 113         uint32_t name_available_length = 0;
 114         uint32_t in_context_offset;
 115         uint32_t in_context_length;
 116         DATA_BLOB in_context_buffer;
 117         struct smb2_create_blobs in_context_blobs;
 118         uint32_t context_offset = 0;
 119         uint32_t context_available_length = 0;
 120         uint32_t dyn_offset;
 121         NTSTATUS status;
 122         bool ok;
 123         struct tevent_req *tsubreq;
 124
 125         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 return smbd_smb2_request_error(smb2req, status);
 128         }
 129         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 130
 131         in_oplock_level         = CVAL(inbody, 0x03);
 132         in_impersonation_level  = IVAL(inbody, 0x04);
 133         in_desired_access       = IVAL(inbody, 0x18);
 134         in_file_attributes      = IVAL(inbody, 0x1C);
 135         in_share_access         = IVAL(inbody, 0x20);
 136         in_create_disposition   = IVAL(inbody, 0x24);
 137         in_create_options       = IVAL(inbody, 0x28);
 138         in_name_offset          = SVAL(inbody, 0x2C);
 139         in_name_length          = SVAL(inbody, 0x2E);
 140         in_context_offset       = IVAL(inbody, 0x30);
 141         in_context_length       = IVAL(inbody, 0x34);
 142
 143         /*
 144          * First check if the dynamic name and context buffers
 145          * are correctly specified.
 146          *
 147          * Note: That we don't check if the name and context buffers
 148          *       overlap
 149          */
 150
 151         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 152
 153         if (in_name_offset == 0 && in_name_length == 0) {
 154                 /* This is ok */
 155                 name_offset = 0;
 156         } else if (in_name_offset < dyn_offset) {
 157                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 158         } else {
 159                 name_offset = in_name_offset - dyn_offset;
 160         }
 161
 162         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 163
 164         if (name_offset > indyniov->iov_len) {
 165                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 166         }
 167
 168         name_available_length = indyniov->iov_len - name_offset;
 169
 170         if (in_name_length > name_available_length) {
 171                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 172         }
 173
 174         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 175         in_name_buffer.length = in_name_length;
 176
 177         if (in_context_offset == 0 && in_context_length == 0) {
 178                 /* This is ok */
 179                 context_offset = 0;
 180         } else if (in_context_offset < dyn_offset) {
 181                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 182         } else {
 183                 context_offset = in_context_offset - dyn_offset;
 184         }
 185
 186         if (context_offset > indyniov->iov_len) {
 187                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 188         }
 189
 190         context_available_length = indyniov->iov_len - context_offset;
 191
 192         if (in_context_length > context_available_length) {
 193                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 194         }
 195
 196         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 197                 context_offset;
 198         in_context_buffer.length = in_context_length;
 199
 200         /*
 201          * Now interpret the name and context buffers
 202          */
 203
 204         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 205                                    in_name_buffer.data,
 206                                    in_name_buffer.length,
 207                                    &in_name_string,
 208                                    &in_name_string_size);
 209         if (!ok) {
 210                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 211         }
 212
 213         if (in_name_buffer.length == 0) {
 214                 in_name_string_size = 0;
 215         }
 216
 217         if (strlen(in_name_string) != in_name_string_size) {
 218                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 219         }
 220
 221         ZERO_STRUCT(in_context_blobs);
 222         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 223         if (!NT_STATUS_IS_OK(status)) {
 224                 return smbd_smb2_request_error(smb2req, status);
 225         }
 226
 227         tsubreq = smbd_smb2_create_send(smb2req,
 228                                        smb2req->sconn->ev_ctx,
 229                                        smb2req,
 230                                        in_oplock_level,
 231                                        in_impersonation_level,
 232                                        in_desired_access,
 233                                        in_file_attributes,
 234                                        in_share_access,
 235                                        in_create_disposition,
 236                                        in_create_options,
 237                                        in_name_string,
 238                                        in_context_blobs);
 239         if (tsubreq == NULL) {
 240                 smb2req->subreq = NULL;
 241                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 242         }
 243         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 244
 245         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 500);
 246 }
 247
 248 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 249 {
 250         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 251         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 252 }
 253
 254 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 255 {
 256         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 257                                         struct smbd_smb2_request);
 258         DATA_BLOB outbody;
 259         DATA_BLOB outdyn;
 260         uint8_t out_oplock_level = 0;
 261         uint32_t out_create_action = 0;
 262         connection_struct *conn = smb2req->tcon->compat;
 263         struct timespec out_creation_ts = { 0, };
 264         struct timespec out_last_access_ts = { 0, };
 265         struct timespec out_last_write_ts = { 0, };
 266         struct timespec out_change_ts = { 0, };
 267         uint64_t out_allocation_size = 0;
 268         uint64_t out_end_of_file = 0;
 269         uint32_t out_file_attributes = 0;
 270         uint64_t out_file_id_persistent = 0;
 271         uint64_t out_file_id_volatile = 0;
 272         struct smb2_create_blobs out_context_blobs;
 273         DATA_BLOB out_context_buffer;
 274         uint16_t out_context_buffer_offset = 0;
 275         NTSTATUS status;
 276         NTSTATUS error; /* transport error */
 277
 278         status = smbd_smb2_create_recv(tsubreq,
 279                                        smb2req,
 280                                        &out_oplock_level,
 281                                        &out_create_action,
 282                                        &out_creation_ts,
 283                                        &out_last_access_ts,
 284                                        &out_last_write_ts,
 285                                        &out_change_ts,
 286                                        &out_allocation_size,
 287                                        &out_end_of_file,
 288                                        &out_file_attributes,
 289                                        &out_file_id_persistent,
 290                                        &out_file_id_volatile,
 291                                        &out_context_blobs);
 292         if (!NT_STATUS_IS_OK(status)) {
 293                 error = smbd_smb2_request_error(smb2req, status);
 294                 if (!NT_STATUS_IS_OK(error)) {
 295                         smbd_server_connection_terminate(smb2req->xconn,
 296                                                          nt_errstr(error));
 297                         return;
 298                 }
 299                 return;
 300         }
 301
 302         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 303         if (!NT_STATUS_IS_OK(status)) {
 304                 error = smbd_smb2_request_error(smb2req, status);
 305                 if (!NT_STATUS_IS_OK(error)) {
 306                         smbd_server_connection_terminate(smb2req->xconn,
 307                                                          nt_errstr(error));
 308                         return;
 309                 }
 310                 return;
 311         }
 312
 313         if (out_context_buffer.length > 0) {
 314                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 315         }
 316
 317         outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
 318         if (outbody.data == NULL) {
 319                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 320                 if (!NT_STATUS_IS_OK(error)) {
 321                         smbd_server_connection_terminate(smb2req->xconn,
 322                                                          nt_errstr(error));
 323                         return;
 324                 }
 325                 return;
 326         }
 327
 328         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 329         SCVAL(outbody.data, 0x02,
 330               out_oplock_level);                /* oplock level */
 331         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 332         SIVAL(outbody.data, 0x04,
 333               out_create_action);               /* create action */
 334         put_long_date_timespec(conn->ts_res,
 335               (char *)outbody.data + 0x08,
 336               out_creation_ts);                 /* creation time */
 337         put_long_date_timespec(conn->ts_res,
 338               (char *)outbody.data + 0x10,
 339               out_last_access_ts);              /* last access time */
 340         put_long_date_timespec(conn->ts_res,
 341               (char *)outbody.data + 0x18,
 342               out_last_write_ts);               /* last write time */
 343         put_long_date_timespec(conn->ts_res,
 344               (char *)outbody.data + 0x20,
 345               out_change_ts);                   /* change time */
 346         SBVAL(outbody.data, 0x28,
 347               out_allocation_size);             /* allocation size */
 348         SBVAL(outbody.data, 0x30,
 349               out_end_of_file);                 /* end of file */
 350         SIVAL(outbody.data, 0x38,
 351               out_file_attributes);             /* file attributes */
 352         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 353         SBVAL(outbody.data, 0x40,
 354               out_file_id_persistent);          /* file id (persistent) */
 355         SBVAL(outbody.data, 0x48,
 356               out_file_id_volatile);            /* file id (volatile) */
 357         SIVAL(outbody.data, 0x50,
 358               out_context_buffer_offset);       /* create contexts offset */
 359         SIVAL(outbody.data, 0x54,
 360               out_context_buffer.length);       /* create contexts length */
 361
 362         outdyn = out_context_buffer;
 363
 364         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 365         if (!NT_STATUS_IS_OK(error)) {
 366                 smbd_server_connection_terminate(smb2req->xconn,
 367                                                  nt_errstr(error));
 368                 return;
 369         }
 370 }
 371
 372 static bool smb2_lease_key_valid(const struct smb2_lease_key *key)
 373 {
 374         return ((key->data[0] != 0) || (key->data[1] != 0));
 375 }
 376
 377 static NTSTATUS smbd_smb2_create_durable_lease_check(struct smb_request *smb1req,
 378         const char *requested_filename, const struct files_struct *fsp,
 379         const struct smb2_lease *lease_ptr)
 380 {
 381         struct smb_filename *smb_fname = NULL;
 382         uint32_t ucf_flags;
 383         NTSTATUS status;
 384
 385         if (lease_ptr == NULL) {
 386                 if (fsp->oplock_type != LEASE_OPLOCK) {
 387                         return NT_STATUS_OK;
 388                 }
 389                 DEBUG(10, ("Reopened file has lease, but no lease "
 390                            "requested\n"));
 391                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 392         }
 393
 394         if (fsp->oplock_type != LEASE_OPLOCK) {
 395                 DEBUG(10, ("Lease requested, but reopened file has no "
 396                            "lease\n"));
 397                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 398         }
 399
 400         if (!smb2_lease_key_equal(&lease_ptr->lease_key,
 401                                   &fsp->lease->lease.lease_key)) {
 402                 DEBUG(10, ("Different lease key requested than found "
 403                            "in reopened file\n"));
 404                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 405         }
 406
 407         ucf_flags = filename_create_ucf_flags(smb1req, FILE_OPEN);
 408         status = filename_convert(talloc_tos(), fsp->conn, false,
 409                                   requested_filename, ucf_flags,
 410                                   NULL, &smb_fname);
 411         if (!NT_STATUS_IS_OK(status)) {
 412                 DEBUG(10, ("filename_convert returned %s\n",
 413                            nt_errstr(status)));
 414                 return status;
 415         }
 416
 417         if (!strequal(fsp->fsp_name->base_name, smb_fname->base_name)) {
 418                 DEBUG(10, ("Lease requested for file %s, reopened file "
 419                            "is named %s\n", smb_fname->base_name,
 420                            fsp->fsp_name->base_name));
 421                 TALLOC_FREE(smb_fname);
 422                 return NT_STATUS_INVALID_PARAMETER;
 423         }
 424
 425         TALLOC_FREE(smb_fname);
 426
 427         return NT_STATUS_OK;
 428 }
 429
 430 struct smbd_smb2_create_state {
 431         struct smbd_smb2_request *smb2req;
 432         struct smb_request *smb1req;
 433         bool open_was_deferred;
 434         struct tevent_timer *te;
 435         struct tevent_immediate *im;
 436         struct timeval request_time;
 437         struct file_id id;
 438         struct deferred_open_record *open_rec;
 439         uint8_t out_oplock_level;
 440         uint32_t out_create_action;
 441         struct timespec out_creation_ts;
 442         struct timespec out_last_access_ts;
 443         struct timespec out_last_write_ts;
 444         struct timespec out_change_ts;
 445         uint64_t out_allocation_size;
 446         uint64_t out_end_of_file;
 447         uint32_t out_file_attributes;
 448         uint64_t out_file_id_persistent;
 449         uint64_t out_file_id_volatile;
 450         struct smb2_create_blobs *out_context_blobs;
 451 };
 452
 453 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 454                         struct tevent_context *ev,
 455                         struct smbd_smb2_request *smb2req,
 456                         uint8_t in_oplock_level,
 457                         uint32_t in_impersonation_level,
 458                         uint32_t in_desired_access,
 459                         uint32_t in_file_attributes,
 460                         uint32_t in_share_access,
 461                         uint32_t in_create_disposition,
 462                         uint32_t in_create_options,
 463                         const char *in_name,
 464                         struct smb2_create_blobs in_context_blobs)
 465 {
 466         struct tevent_req *req = NULL;
 467         struct smbd_smb2_create_state *state = NULL;
 468         NTSTATUS status;
 469         struct smb_request *smb1req = NULL;
 470         files_struct *result = NULL;
 471         int info;
 472         int requested_oplock_level;
 473         struct smb2_create_blob *dhnc = NULL;
 474         struct smb2_create_blob *dh2c = NULL;
 475         struct smb2_create_blob *dhnq = NULL;
 476         struct smb2_create_blob *dh2q = NULL;
 477         struct smb2_create_blob *rqls = NULL;
 478         bool replay_operation = false;
 479
 480         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 481                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 482         } else {
 483                 requested_oplock_level = in_oplock_level;
 484         }
 485
 486         req = tevent_req_create(mem_ctx, &state,
 487                                 struct smbd_smb2_create_state);
 488         if (req == NULL) {
 489                 return NULL;
 490         }
 491         state->smb2req = smb2req;
 492
 493         smb1req = smbd_smb2_fake_smb_request(smb2req);
 494         if (tevent_req_nomem(smb1req, req)) {
 495                 return tevent_req_post(req, ev);
 496         }
 497         state->smb1req = smb1req;
 498
 499         if (smb2req->subreq == NULL) {
 500                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 501                         in_name));
 502         } else {
 503                 struct smbd_smb2_create_state *old_state = tevent_req_data(
 504                         smb2req->subreq, struct smbd_smb2_create_state);
 505
 506                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 507                         in_name ));
 508
 509                 state->id = old_state->id;
 510                 state->request_time = old_state->request_time;
 511                 state->open_rec = talloc_move(state, &old_state->open_rec);
 512                 state->open_was_deferred = old_state->open_was_deferred;
 513         }
 514
 515         TALLOC_FREE(smb2req->subreq);
 516         smb2req->subreq = req;
 517
 518         state->out_context_blobs = talloc_zero(state, struct smb2_create_blobs);
 519         if (tevent_req_nomem(state->out_context_blobs, req)) {
 520                 return tevent_req_post(req, ev);
 521         }
 522
 523         dhnq = smb2_create_blob_find(&in_context_blobs,
 524                                      SMB2_CREATE_TAG_DHNQ);
 525         dhnc = smb2_create_blob_find(&in_context_blobs,
 526                                      SMB2_CREATE_TAG_DHNC);
 527         dh2q = smb2_create_blob_find(&in_context_blobs,
 528                                      SMB2_CREATE_TAG_DH2Q);
 529         dh2c = smb2_create_blob_find(&in_context_blobs,
 530                                      SMB2_CREATE_TAG_DH2C);
 531         if (smb2req->xconn->smb2.server.capabilities & SMB2_CAP_LEASING) {
 532                 rqls = smb2_create_blob_find(&in_context_blobs,
 533                                              SMB2_CREATE_TAG_RQLS);
 534         }
 535
 536         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 537             (dh2q && dh2c))
 538         {
 539                 /* not both are allowed at the same time */
 540                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 541                 return tevent_req_post(req, ev);
 542         }
 543
 544         if (dhnc) {
 545                 uint32_t num_blobs_allowed;
 546
 547                 if (dhnc->data.length != 16) {
 548                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 549                         return tevent_req_post(req, ev);
 550                 }
 551
 552                 /*
 553                  * According to MS-SMB2: 3.3.5.9.7, "Handling the
 554                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
 555                  * we should ignore an additional dhnq blob, but fail
 556                  * the request (with status OBJECT_NAME_NOT_FOUND) if
 557                  * any other extra create blob has been provided.
 558                  *
 559                  * (Note that the cases of an additional dh2q or dh2c blob
 560                  *  which require a different error code, have been treated
 561                  *  above.)
 562                  */
 563
 564                 if (dhnq) {
 565                         num_blobs_allowed = 2;
 566                 } else {
 567                         num_blobs_allowed = 1;
 568                 }
 569
 570                 if (rqls != NULL) {
 571                         num_blobs_allowed += 1;
 572                 }
 573
 574                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 575                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 576                         return tevent_req_post(req, ev);
 577                 }
 578         }
 579
 580         if (dh2c) {
 581                 uint32_t num_blobs_allowed;
 582
 583                 if (dh2c->data.length != 36) {
 584                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 585                         return tevent_req_post(req, ev);
 586                 }
 587
 588                 /*
 589                  * According to MS-SMB2: 3.3.5.9.12, "Handling the
 590                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
 591                  * we should fail the request with status
 592                  * OBJECT_NAME_NOT_FOUND if any other create blob has been
 593                  * provided.
 594                  *
 595                  * (Note that the cases of an additional dhnq, dhnc or dh2q
 596                  *  blob which require a different error code, have been
 597                  *  treated above.)
 598                  */
 599
 600                 num_blobs_allowed = 1;
 601
 602                 if (rqls != NULL) {
 603                         num_blobs_allowed += 1;
 604                 }
 605
 606                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 607                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 608                         return tevent_req_post(req, ev);
 609                 }
 610         }
 611
 612         if (IS_IPC(smb1req->conn)) {
 613                 const char *pipe_name = in_name;
 614
 615                 if (dhnc || dh2c) {
 616                         /* durable handles are not supported on IPC$ */
 617                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 618                         return tevent_req_post(req, ev);
 619                 }
 620
 621                 if (!lp_nt_pipe_support()) {
 622                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 623                         return tevent_req_post(req, ev);
 624                 }
 625
 626                 status = open_np_file(smb1req, pipe_name, &result);
 627                 if (!NT_STATUS_IS_OK(status)) {
 628                         tevent_req_nterror(req, status);
 629                         return tevent_req_post(req, ev);
 630                 }
 631                 info = FILE_WAS_OPENED;
 632         } else if (CAN_PRINT(smb1req->conn)) {
 633                 if (dhnc || dh2c) {
 634                         /* durable handles are not supported on printers */
 635                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 636                         return tevent_req_post(req, ev);
 637                 }
 638
 639                 status = file_new(smb1req, smb1req->conn, &result);
 640                 if(!NT_STATUS_IS_OK(status)) {
 641                         tevent_req_nterror(req, status);
 642                         return tevent_req_post(req, ev);
 643                 }
 644
 645                 status = print_spool_open(result, in_name,
 646                                           smb1req->vuid);
 647                 if (!NT_STATUS_IS_OK(status)) {
 648                         file_free(smb1req, result);
 649                         tevent_req_nterror(req, status);
 650                         return tevent_req_post(req, ev);
 651                 }
 652                 info = FILE_WAS_CREATED;
 653         } else {
 654                 char *fname;
 655                 struct smb2_create_blob *exta = NULL;
 656                 struct ea_list *ea_list = NULL;
 657                 struct smb2_create_blob *mxac = NULL;
 658                 NTTIME max_access_time = 0;
 659                 struct smb2_create_blob *secd = NULL;
 660                 struct security_descriptor *sec_desc = NULL;
 661                 struct smb2_create_blob *alsi = NULL;
 662                 uint64_t allocation_size = 0;
 663                 struct smb2_create_blob *twrp = NULL;
 664                 struct smb2_create_blob *qfid = NULL;
 665                 struct GUID _create_guid = GUID_zero();
 666                 struct GUID *create_guid = NULL;
 667                 bool update_open = false;
 668                 bool durable_requested = false;
 669                 uint32_t durable_timeout_msec = 0;
 670                 bool do_durable_reconnect = false;
 671                 uint64_t persistent_id = 0;
 672                 struct smb2_lease lease;
 673                 struct smb2_lease *lease_ptr = NULL;
 674                 ssize_t lease_len = -1;
 675                 bool need_replay_cache = false;
 676                 struct smbXsrv_open *op = NULL;
 677 #if 0
 678                 struct smb2_create_blob *svhdx = NULL;
 679 #endif
 680
 681                 exta = smb2_create_blob_find(&in_context_blobs,
 682                                              SMB2_CREATE_TAG_EXTA);
 683                 mxac = smb2_create_blob_find(&in_context_blobs,
 684                                              SMB2_CREATE_TAG_MXAC);
 685                 secd = smb2_create_blob_find(&in_context_blobs,
 686                                              SMB2_CREATE_TAG_SECD);
 687                 alsi = smb2_create_blob_find(&in_context_blobs,
 688                                              SMB2_CREATE_TAG_ALSI);
 689                 twrp = smb2_create_blob_find(&in_context_blobs,
 690                                              SMB2_CREATE_TAG_TWRP);
 691                 qfid = smb2_create_blob_find(&in_context_blobs,
 692                                              SMB2_CREATE_TAG_QFID);
 693 #if 0
 694                 if (smb2req->xconn->protocol >= PROTOCOL_SMB3_02) {
 695                         /*
 696                          * This was introduced with SMB3_02
 697                          */
 698                         svhdx = smb2_create_blob_find(&in_context_blobs,
 699                                                       SVHDX_OPEN_DEVICE_CONTEXT);
 700                 }
 701 #endif
 702
 703                 fname = talloc_strdup(state, in_name);
 704                 if (tevent_req_nomem(fname, req)) {
 705                         return tevent_req_post(req, ev);
 706                 }
 707
 708                 if (exta) {
 709                         if (!lp_ea_support(SNUM(smb2req->tcon->compat))) {
 710                                 tevent_req_nterror(req,
 711                                         NT_STATUS_EAS_NOT_SUPPORTED);
 712                                 return tevent_req_post(req, ev);
 713                         }
 714
 715                         ea_list = read_nttrans_ea_list(mem_ctx,
 716                                 (const char *)exta->data.data, exta->data.length);
 717                         if (!ea_list) {
 718                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 719                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 720                                 return tevent_req_post(req, ev);
 721                         }
 722
 723                         /*
 724                          * NB. When SMB2+ unix extensions are added,
 725                          * we need to relax this check in invalid
 726                          * names - we used to not do this if
 727                          * lp_posix_pathnames() was false.
 728                          */
 729                         if (ea_list_has_invalid_name(ea_list)) {
 730                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 731                                 return tevent_req_post(req, ev);
 732                         }
 733                 }
 734
 735                 if (mxac) {
 736                         if (mxac->data.length == 0) {
 737                                 max_access_time = 0;
 738                         } else if (mxac->data.length == 8) {
 739                                 max_access_time = BVAL(mxac->data.data, 0);
 740                         } else {
 741                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 742                                 return tevent_req_post(req, ev);
 743                         }
 744                 }
 745
 746                 if (secd) {
 747                         enum ndr_err_code ndr_err;
 748
 749                         sec_desc = talloc_zero(state, struct security_descriptor);
 750                         if (tevent_req_nomem(sec_desc, req)) {
 751                                 return tevent_req_post(req, ev);
 752                         }
 753
 754                         ndr_err = ndr_pull_struct_blob(&secd->data,
 755                                 sec_desc, sec_desc,
 756                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 757                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 758                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 759                                          ndr_errstr(ndr_err)));
 760                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 761                                 return tevent_req_post(req, ev);
 762                         }
 763                 }
 764
 765                 if (dhnq) {
 766                         if (dhnq->data.length != 16) {
 767                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 768                                 return tevent_req_post(req, ev);
 769                         }
 770
 771                         if (dh2q) {
 772                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 773                                 return tevent_req_post(req, ev);
 774                         }
 775
 776                         /*
 777                          * durable handle request is processed below.
 778                          */
 779                         durable_requested = true;
 780                         /*
 781                          * Set the timeout to 16 mins.
 782                          *
 783                          * TODO: test this against Windows 2012
 784                          *       as the default for durable v2 is 1 min.
 785                          */
 786                         durable_timeout_msec = (16*60*1000);
 787                 }
 788
 789                 if (dh2q) {
 790                         const uint8_t *p = dh2q->data.data;
 791                         uint32_t durable_v2_timeout = 0;
 792                         DATA_BLOB create_guid_blob;
 793                         const uint8_t *hdr;
 794                         uint32_t flags;
 795
 796                         if (dh2q->data.length != 32) {
 797                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 798                                 return tevent_req_post(req, ev);
 799                         }
 800
 801                         if (dhnq) {
 802                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 803                                 return tevent_req_post(req, ev);
 804                         }
 805
 806                         durable_v2_timeout = IVAL(p, 0);
 807                         create_guid_blob = data_blob_const(p + 16, 16);
 808
 809                         status = GUID_from_ndr_blob(&create_guid_blob,
 810                                                     &_create_guid);
 811                         if (tevent_req_nterror(req, status)) {
 812                                 return tevent_req_post(req, ev);
 813                         }
 814                         create_guid = &_create_guid;
 815                         /*
 816                          * we need to store the create_guid later
 817                          */
 818                         update_open = true;
 819
 820                         /*
 821                          * And we need to create a cache for replaying the
 822                          * create.
 823                          */
 824                         need_replay_cache = true;
 825
 826                         /*
 827                          * durable handle v2 request processed below
 828                          */
 829                         durable_requested = true;
 830                         durable_timeout_msec = durable_v2_timeout;
 831                         if (durable_timeout_msec == 0) {
 832                                 /*
 833                                  * Set the timeout to 1 min as default.
 834                                  *
 835                                  * This matches Windows 2012.
 836                                  */
 837                                 durable_timeout_msec = (60*1000);
 838                         }
 839
 840                         /*
 841                          * Check for replay operation.
 842                          * Only consider it when we have dh2q.
 843                          * If we do not have a replay operation, verify that
 844                          * the create_guid is not cached for replay.
 845                          */
 846                         hdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
 847                         flags = IVAL(hdr, SMB2_HDR_FLAGS);
 848                         replay_operation =
 849                                 flags & SMB2_HDR_FLAG_REPLAY_OPERATION;
 850
 851                         status = smb2srv_open_lookup_replay_cache(
 852                                         smb2req->xconn, create_guid,
 853                                         0 /* now */, &op);
 854
 855                         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 856                                 replay_operation = false;
 857                         } else if (tevent_req_nterror(req, status)) {
 858                                 DBG_WARNING("smb2srv_open_lookup_replay_cache "
 859                                             "failed: %s\n", nt_errstr(status));
 860                                 return tevent_req_post(req, ev);
 861                         } else if (!replay_operation) {
 862                                 /*
 863                                  * If a create without replay operation flag
 864                                  * is sent but with a create_guid that is
 865                                  * currently in the replay cache -- fail.
 866                                  */
 867                                 status = NT_STATUS_DUPLICATE_OBJECTID;
 868                                 (void)tevent_req_nterror(req, status);
 869                                 return tevent_req_post(req, ev);
 870                         }
 871                 }
 872
 873                 if (dhnc) {
 874                         persistent_id = BVAL(dhnc->data.data, 0);
 875
 876                         do_durable_reconnect = true;
 877                 }
 878
 879                 if (dh2c) {
 880                         const uint8_t *p = dh2c->data.data;
 881                         DATA_BLOB create_guid_blob;
 882
 883                         persistent_id = BVAL(p, 0);
 884                         create_guid_blob = data_blob_const(p + 16, 16);
 885
 886                         status = GUID_from_ndr_blob(&create_guid_blob,
 887                                                     &_create_guid);
 888                         if (tevent_req_nterror(req, status)) {
 889                                 return tevent_req_post(req, ev);
 890                         }
 891                         create_guid = &_create_guid;
 892
 893                         do_durable_reconnect = true;
 894                 }
 895
 896                 if (alsi) {
 897                         if (alsi->data.length != 8) {
 898                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 899                                 return tevent_req_post(req, ev);
 900                         }
 901                         allocation_size = BVAL(alsi->data.data, 0);
 902                 }
 903
 904                 if (twrp) {
 905                         NTTIME nttime;
 906                         time_t t;
 907                         struct tm *tm;
 908
 909                         if (twrp->data.length != 8) {
 910                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 911                                 return tevent_req_post(req, ev);
 912                         }
 913
 914                         nttime = BVAL(twrp->data.data, 0);
 915                         t = nt_time_to_unix(nttime);
 916                         tm = gmtime(&t);
 917
 918                         TALLOC_FREE(fname);
 919                         fname = talloc_asprintf(state,
 920                                         "%s\\@GMT-%04u.%02u.%02u-%02u.%02u.%02u",
 921                                         in_name,
 922                                         tm->tm_year + 1900,
 923                                         tm->tm_mon + 1,
 924                                         tm->tm_mday,
 925                                         tm->tm_hour,
 926                                         tm->tm_min,
 927                                         tm->tm_sec);
 928                         if (tevent_req_nomem(fname, req)) {
 929                                 return tevent_req_post(req, ev);
 930                         }
 931                 }
 932
 933                 if (qfid) {
 934                         if (qfid->data.length != 0) {
 935                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 936                                 return tevent_req_post(req, ev);
 937                         }
 938                 }
 939
 940                 if (rqls) {
 941                         lease_len = smb2_lease_pull(
 942                                 rqls->data.data, rqls->data.length, &lease);
 943                         if (lease_len == -1) {
 944                                 tevent_req_nterror(
 945                                         req, NT_STATUS_INVALID_PARAMETER);
 946                                 return tevent_req_post(req, ev);
 947                         }
 948                         lease_ptr = &lease;
 949
 950                         if (DEBUGLEVEL >= 10) {
 951                                 DEBUG(10, ("Got lease request size %d\n",
 952                                            (int)lease_len));
 953                                 NDR_PRINT_DEBUG(smb2_lease, lease_ptr);
 954                         }
 955
 956                         if (!smb2_lease_key_valid(&lease.lease_key)) {
 957                                 lease_ptr = NULL;
 958                                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 959                         }
 960
 961                         if ((smb2req->xconn->protocol < PROTOCOL_SMB3_00) &&
 962                             (lease.lease_version != 1)) {
 963                                 DEBUG(10, ("v2 lease key only for SMB3\n"));
 964                                 lease_ptr = NULL;
 965                         }
 966
 967                         /*
 968                          * Replay with a lease is only allowed if the
 969                          * established open carries a lease with the
 970                          * same lease key.
 971                          */
 972                         if (replay_operation) {
 973                                 struct smb2_lease *op_ls =
 974                                                 &op->compat->lease->lease;
 975                                 int op_oplock = op->compat->oplock_type;
 976
 977                                 if (map_samba_oplock_levels_to_smb2(op_oplock)
 978                                     != SMB2_OPLOCK_LEVEL_LEASE)
 979                                 {
 980                                         status = NT_STATUS_ACCESS_DENIED;
 981                                         (void)tevent_req_nterror(req, status);
 982                                         return tevent_req_post(req, ev);
 983                                 }
 984                                 if (!smb2_lease_key_equal(&lease.lease_key,
 985                                                           &op_ls->lease_key))
 986                                 {
 987                                         status = NT_STATUS_ACCESS_DENIED;
 988                                         (void)tevent_req_nterror(req, status);
 989                                         return tevent_req_post(req, ev);
 990                                 }
 991                         }
 992                 }
 993
 994                 /* these are ignored for SMB2 */
 995                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 996                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 997
 998                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 999
1000                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
1001
1002                 /*
1003                  * For the backend file open procedure, there are
1004                  * three possible modes: replay operation (in which case
1005                  * there is nothing else to do), durable_reconnect or
1006                  * new open.
1007                  */
1008                 if (replay_operation) {
1009                         result = op->compat;
1010                         result->op = op;
1011                         update_open = false;
1012                         info = op->create_action;
1013                 } else if (do_durable_reconnect) {
1014                         DATA_BLOB new_cookie = data_blob_null;
1015                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
1016
1017                         status = smb2srv_open_recreate(smb2req->xconn,
1018                                                 smb1req->conn->session_info,
1019                                                 persistent_id, create_guid,
1020                                                 now, &op);
1021                         if (!NT_STATUS_IS_OK(status)) {
1022                                 DEBUG(3, ("smbd_smb2_create_send: "
1023                                           "smb2srv_open_recreate failed: %s\n",
1024                                           nt_errstr(status)));
1025                                 tevent_req_nterror(req, status);
1026                                 return tevent_req_post(req, ev);
1027                         }
1028
1029                         DEBUG(10, ("smb2_create_send: %s to recreate the "
1030                                    "smb2srv_open struct for a durable handle.\n",
1031                                    op->global->durable ? "succeded" : "failed"));
1032
1033                         if (!op->global->durable) {
1034                                 talloc_free(op);
1035                                 tevent_req_nterror(req,
1036                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
1037                                 return tevent_req_post(req, ev);
1038                         }
1039
1040                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
1041                                                 smb1req,
1042                                                 op, /* smbXsrv_open input */
1043                                                 op->global->backend_cookie,
1044                                                 op, /* TALLOC_CTX */
1045                                                 &result, &new_cookie);
1046                         if (!NT_STATUS_IS_OK(status)) {
1047                                 NTSTATUS return_status;
1048
1049                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
1050
1051                                 DEBUG(3, ("smbd_smb2_create_send: "
1052                                           "durable_reconnect failed: %s => %s\n",
1053                                           nt_errstr(status),
1054                                           nt_errstr(return_status)));
1055
1056                                 tevent_req_nterror(req, return_status);
1057                                 return tevent_req_post(req, ev);
1058                         }
1059
1060                         DEBUG(10, ("result->oplock_type=%u, lease_ptr==%p\n",
1061                                    (unsigned)result->oplock_type, lease_ptr));
1062
1063                         status = smbd_smb2_create_durable_lease_check(
1064                                 smb1req, fname, result, lease_ptr);
1065                         if (!NT_STATUS_IS_OK(status)) {
1066                                 close_file(smb1req, result, SHUTDOWN_CLOSE);
1067                                 tevent_req_nterror(req, status);
1068                                 return tevent_req_post(req, ev);
1069                         }
1070
1071                         data_blob_free(&op->global->backend_cookie);
1072                         op->global->backend_cookie = new_cookie;
1073
1074                         op->status = NT_STATUS_OK;
1075                         op->global->disconnect_time = 0;
1076
1077                         /* save the timout for later update */
1078                         durable_timeout_msec = op->global->durable_timeout_msec;
1079
1080                         update_open = true;
1081
1082                         info = FILE_WAS_OPENED;
1083                 } else {
1084                         struct smb_filename *smb_fname = NULL;
1085                         uint32_t ucf_flags;
1086
1087                         if (requested_oplock_level == SMB2_OPLOCK_LEVEL_LEASE) {
1088                                 if (lease_ptr == NULL) {
1089                                         requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
1090                                 }
1091                         } else {
1092                                 lease_ptr = NULL;
1093                         }
1094
1095                         /*
1096                          * For a DFS path the function parse_dfs_path()
1097                          * will do the path processing.
1098                          */
1099
1100                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
1101                                 /* convert '\\' into '/' */
1102                                 status = check_path_syntax(fname);
1103                                 if (!NT_STATUS_IS_OK(status)) {
1104                                         tevent_req_nterror(req, status);
1105                                         return tevent_req_post(req, ev);
1106                                 }
1107                         }
1108
1109                         ucf_flags = filename_create_ucf_flags(smb1req, in_create_disposition);
1110                         status = filename_convert(req,
1111                                                   smb1req->conn,
1112                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
1113                                                   fname,
1114                                                   ucf_flags,
1115                                                   NULL, /* ppath_contains_wcards */
1116                                                   &smb_fname);
1117                         if (!NT_STATUS_IS_OK(status)) {
1118                                 tevent_req_nterror(req, status);
1119                                 return tevent_req_post(req, ev);
1120                         }
1121
1122                         /*
1123                          * MS-SMB2: 2.2.13 SMB2 CREATE Request
1124                          * ImpersonationLevel ... MUST contain one of the
1125                          * following values. The server MUST validate this
1126                          * field, but otherwise ignore it.
1127                          *
1128                          * NB. The source4/torture/smb2/durable_open.c test
1129                          * shows this check is only done on real opens, not
1130                          * on durable handle-reopens.
1131                          */
1132
1133                         if (in_impersonation_level >
1134                                         SMB2_IMPERSONATION_DELEGATE) {
1135                                 tevent_req_nterror(req,
1136                                         NT_STATUS_BAD_IMPERSONATION_LEVEL);
1137                                 return tevent_req_post(req, ev);
1138                         }
1139
1140                         /*
1141                          * We know we're going to do a local open, so now
1142                          * we must be protocol strict. JRA.
1143                          *
1144                          * MS-SMB2: 3.3.5.9 - Receiving an SMB2 CREATE Request
1145                          * If the file name length is greater than zero and the
1146                          * first character is a path separator character, the
1147                          * server MUST fail the request with
1148                          * STATUS_INVALID_PARAMETER.
1149                          */
1150                         if (in_name[0] == '\\' || in_name[0] == '/') {
1151                                 tevent_req_nterror(req,
1152                                         NT_STATUS_INVALID_PARAMETER);
1153                                 return tevent_req_post(req, ev);
1154                         }
1155
1156                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
1157                                                      smb1req,
1158                                                      0, /* root_dir_fid */
1159                                                      smb_fname,
1160                                                      in_desired_access,
1161                                                      in_share_access,
1162                                                      in_create_disposition,
1163                                                      in_create_options,
1164                                                      in_file_attributes,
1165                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
1166                                                      lease_ptr,
1167                                                      allocation_size,
1168                                                      0, /* private_flags */
1169                                                      sec_desc,
1170                                                      ea_list,
1171                                                      &result,
1172                                                      &info,
1173                                                      &in_context_blobs,
1174                                                      state->out_context_blobs);
1175                         if (!NT_STATUS_IS_OK(status)) {
1176                                 if (open_was_deferred(smb1req->xconn, smb1req->mid)) {
1177                                         SMBPROFILE_IOBYTES_ASYNC_SET_IDLE(smb2req->profile);
1178                                         return req;
1179                                 }
1180                                 tevent_req_nterror(req, status);
1181                                 return tevent_req_post(req, ev);
1182                         }
1183                         op = result->op;
1184                 }
1185
1186                 /*
1187                  * here we have op == result->op
1188                  */
1189
1190                 DEBUG(10, ("smbd_smb2_create_send: "
1191                            "response construction phase\n"));
1192
1193                 if (mxac) {
1194                         NTTIME last_write_time;
1195
1196                         last_write_time = unix_timespec_to_nt_time(
1197                                                  result->fsp_name->st.st_ex_mtime);
1198                         if (last_write_time != max_access_time) {
1199                                 uint8_t p[8];
1200                                 uint32_t max_access_granted;
1201                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1202
1203                                 status = smbd_calculate_access_mask(smb1req->conn,
1204                                                         result->fsp_name,
1205                                                         false,
1206                                                         SEC_FLAG_MAXIMUM_ALLOWED,
1207                                                         &max_access_granted);
1208
1209                                 SIVAL(p, 0, NT_STATUS_V(status));
1210                                 SIVAL(p, 4, max_access_granted);
1211
1212                                 status = smb2_create_blob_add(
1213                                     state->out_context_blobs,
1214                                     state->out_context_blobs,
1215                                     SMB2_CREATE_TAG_MXAC,
1216                                     blob);
1217                                 if (!NT_STATUS_IS_OK(status)) {
1218                                         tevent_req_nterror(req, status);
1219                                         return tevent_req_post(req, ev);
1220                                 }
1221                         }
1222                 }
1223
1224                 if (!replay_operation && durable_requested &&
1225                     (fsp_lease_type(result) & SMB2_LEASE_HANDLE))
1226                 {
1227                         status = SMB_VFS_DURABLE_COOKIE(result,
1228                                                 op,
1229                                                 &op->global->backend_cookie);
1230                         if (!NT_STATUS_IS_OK(status)) {
1231                                 op->global->backend_cookie = data_blob_null;
1232                         }
1233                 }
1234                 if (!replay_operation && op->global->backend_cookie.length > 0)
1235                 {
1236                         update_open = true;
1237
1238                         op->global->durable = true;
1239                         op->global->durable_timeout_msec = durable_timeout_msec;
1240                 }
1241
1242                 if (update_open) {
1243                         op->global->create_guid = _create_guid;
1244                         if (need_replay_cache) {
1245                                 op->flags |= SMBXSRV_OPEN_NEED_REPLAY_CACHE;
1246                         }
1247
1248                         status = smbXsrv_open_update(op);
1249                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
1250                                    "returned %s\n",
1251                                    nt_errstr(status)));
1252                         if (!NT_STATUS_IS_OK(status)) {
1253                                 tevent_req_nterror(req, status);
1254                                 return tevent_req_post(req, ev);
1255                         }
1256                 }
1257
1258                 if (dhnq && op->global->durable) {
1259                         uint8_t p[8] = { 0, };
1260                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1261
1262                         status = smb2_create_blob_add(state->out_context_blobs,
1263                                                       state->out_context_blobs,
1264                                                       SMB2_CREATE_TAG_DHNQ,
1265                                                       blob);
1266                         if (!NT_STATUS_IS_OK(status)) {
1267                                 tevent_req_nterror(req, status);
1268                                 return tevent_req_post(req, ev);
1269                         }
1270                 }
1271
1272                 if (dh2q && op->global->durable &&
1273                     /*
1274                      * For replay operations, we return the dh2q blob
1275                      * in the case of oplocks not based on the state of
1276                      * the open, but on whether it could have been granted
1277                      * for the request data. In the case of leases instead,
1278                      * the state of the open is used...
1279                      */
1280                     (!replay_operation ||
1281                      in_oplock_level == SMB2_OPLOCK_LEVEL_BATCH ||
1282                      in_oplock_level == SMB2_OPLOCK_LEVEL_LEASE))
1283                 {
1284                         uint8_t p[8] = { 0, };
1285                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1286                         uint32_t durable_v2_response_flags = 0;
1287
1288                         SIVAL(p, 0, op->global->durable_timeout_msec);
1289                         SIVAL(p, 4, durable_v2_response_flags);
1290
1291                         status = smb2_create_blob_add(state->out_context_blobs,
1292                                                       state->out_context_blobs,
1293                                                       SMB2_CREATE_TAG_DH2Q,
1294                                                       blob);
1295                         if (!NT_STATUS_IS_OK(status)) {
1296                                 tevent_req_nterror(req, status);
1297                                 return tevent_req_post(req, ev);
1298                         }
1299                 }
1300
1301                 if (qfid) {
1302                         uint8_t p[32];
1303                         uint64_t file_index = get_FileIndex(result->conn,
1304                                                         &result->fsp_name->st);
1305                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1306
1307                         ZERO_STRUCT(p);
1308
1309                         /* From conversations with Microsoft engineers at
1310                            the MS plugfest. The first 8 bytes are the "volume index"
1311                            == inode, the second 8 bytes are the "volume id",
1312                            == dev. This will be updated in the SMB2 doc. */
1313                         SBVAL(p, 0, file_index);
1314                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1315
1316                         status = smb2_create_blob_add(state->out_context_blobs,
1317                                                       state->out_context_blobs,
1318                                                       SMB2_CREATE_TAG_QFID,
1319                                                       blob);
1320                         if (!NT_STATUS_IS_OK(status)) {
1321                                 tevent_req_nterror(req, status);
1322                                 return tevent_req_post(req, ev);
1323                         }
1324                 }
1325
1326                 if ((rqls != NULL) && (result->oplock_type == LEASE_OPLOCK)) {
1327                         uint8_t buf[52];
1328
1329                         lease = result->lease->lease;
1330
1331                         lease_len = sizeof(buf);
1332                         if (lease.lease_version == 1) {
1333                                 lease_len = 32;
1334                         }
1335
1336                         if (!smb2_lease_push(&lease, buf, lease_len)) {
1337                                 tevent_req_nterror(
1338                                         req, NT_STATUS_INTERNAL_ERROR);
1339                                 return tevent_req_post(req, ev);
1340                         }
1341
1342                         status = smb2_create_blob_add(
1343                                 state, state->out_context_blobs,
1344                                 SMB2_CREATE_TAG_RQLS,
1345                                 data_blob_const(buf, lease_len));
1346                         if (!NT_STATUS_IS_OK(status)) {
1347                                 tevent_req_nterror(req, status);
1348                                 return tevent_req_post(req, ev);
1349                         }
1350                 }
1351         }
1352
1353         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1354
1355         if (replay_operation) {
1356                 state->out_oplock_level = in_oplock_level;
1357         } else if (lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1358                 state->out_oplock_level = in_oplock_level;
1359         } else {
1360                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1361         }
1362
1363         if ((in_create_disposition == FILE_SUPERSEDE)
1364             && (info == FILE_WAS_OVERWRITTEN)) {
1365                 state->out_create_action = FILE_WAS_SUPERSEDED;
1366         } else {
1367                 state->out_create_action = info;
1368         }
1369         result->op->create_action = state->out_create_action;
1370         state->out_file_attributes = dos_mode(result->conn,
1371                                            result->fsp_name);
1372
1373         state->out_creation_ts = get_create_timespec(smb1req->conn,
1374                                         result, result->fsp_name);
1375         state->out_last_access_ts = result->fsp_name->st.st_ex_atime;
1376         state->out_last_write_ts = result->fsp_name->st.st_ex_mtime;
1377         state->out_change_ts = get_change_timespec(smb1req->conn,
1378                                         result, result->fsp_name);
1379
1380         if (lp_dos_filetime_resolution(SNUM(smb2req->tcon->compat))) {
1381                 dos_filetime_timespec(&state->out_creation_ts);
1382                 dos_filetime_timespec(&state->out_last_access_ts);
1383                 dos_filetime_timespec(&state->out_last_write_ts);
1384                 dos_filetime_timespec(&state->out_change_ts);
1385         }
1386
1387         state->out_allocation_size =
1388                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1389                                                &(result->fsp_name->st));
1390         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1391         if (state->out_file_attributes == 0) {
1392                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1393         }
1394         state->out_file_id_persistent = result->op->global->open_persistent_id;
1395         state->out_file_id_volatile = result->op->global->open_volatile_id;
1396
1397         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1398                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1399
1400         tevent_req_done(req);
1401         return tevent_req_post(req, ev);
1402 }
1403
1404 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1405                         TALLOC_CTX *mem_ctx,
1406                         uint8_t *out_oplock_level,
1407                         uint32_t *out_create_action,
1408                         struct timespec *out_creation_ts,
1409                         struct timespec *out_last_access_ts,
1410                         struct timespec *out_last_write_ts,
1411                         struct timespec *out_change_ts,
1412                         uint64_t *out_allocation_size,
1413                         uint64_t *out_end_of_file,
1414                         uint32_t *out_file_attributes,
1415                         uint64_t *out_file_id_persistent,
1416                         uint64_t *out_file_id_volatile,
1417                         struct smb2_create_blobs *out_context_blobs)
1418 {
1419         NTSTATUS status;
1420         struct smbd_smb2_create_state *state = tevent_req_data(req,
1421                                                struct smbd_smb2_create_state);
1422
1423         if (tevent_req_is_nterror(req, &status)) {
1424                 tevent_req_received(req);
1425                 return status;
1426         }
1427
1428         *out_oplock_level       = state->out_oplock_level;
1429         *out_create_action      = state->out_create_action;
1430         *out_creation_ts        = state->out_creation_ts;
1431         *out_last_access_ts     = state->out_last_access_ts;
1432         *out_last_write_ts      = state->out_last_write_ts;
1433         *out_change_ts          = state->out_change_ts;
1434         *out_allocation_size    = state->out_allocation_size;
1435         *out_end_of_file        = state->out_end_of_file;
1436         *out_file_attributes    = state->out_file_attributes;
1437         *out_file_id_persistent = state->out_file_id_persistent;
1438         *out_file_id_volatile   = state->out_file_id_volatile;
1439         *out_context_blobs      = *(state->out_context_blobs);
1440
1441         talloc_steal(mem_ctx, state->out_context_blobs->blobs);
1442
1443         tevent_req_received(req);
1444         return NT_STATUS_OK;
1445 }
1446
1447 /*********************************************************
1448  Code for dealing with deferred opens.
1449 *********************************************************/
1450
1451 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1452                         struct timeval *p_request_time,
1453                         struct deferred_open_record **open_rec)
1454 {
1455         struct smbd_smb2_create_state *state = NULL;
1456         struct tevent_req *req = NULL;
1457
1458         if (!smb2req) {
1459                 return false;
1460         }
1461         req = smb2req->subreq;
1462         if (!req) {
1463                 return false;
1464         }
1465         state = tevent_req_data(req, struct smbd_smb2_create_state);
1466         if (!state) {
1467                 return false;
1468         }
1469         if (!state->open_was_deferred) {
1470                 return false;
1471         }
1472         if (p_request_time) {
1473                 *p_request_time = state->request_time;
1474         }
1475         if (open_rec != NULL) {
1476                 *open_rec = state->open_rec;
1477         }
1478         return true;
1479 }
1480
1481 /*********************************************************
1482  Re-process this call early - requested by message or
1483  close.
1484 *********************************************************/
1485
1486 static struct smbd_smb2_request *find_open_smb2req(
1487         struct smbXsrv_connection *xconn, uint64_t mid)
1488 {
1489         struct smbd_smb2_request *smb2req;
1490
1491         for (smb2req = xconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1492                 uint64_t message_id;
1493                 if (smb2req->subreq == NULL) {
1494                         /* This message has been processed. */
1495                         continue;
1496                 }
1497                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1498                         /* This message has been processed. */
1499                         continue;
1500                 }
1501                 message_id = get_mid_from_smb2req(smb2req);
1502                 if (message_id == mid) {
1503                         return smb2req;
1504                 }
1505         }
1506         return NULL;
1507 }
1508
1509 bool open_was_deferred_smb2(struct smbXsrv_connection *xconn, uint64_t mid)
1510 {
1511         struct smbd_smb2_create_state *state = NULL;
1512         struct smbd_smb2_request *smb2req;
1513
1514         smb2req = find_open_smb2req(xconn, mid);
1515
1516         if (!smb2req) {
1517                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1518                         (unsigned long long)mid));
1519                 return false;
1520         }
1521         if (!smb2req->subreq) {
1522                 return false;
1523         }
1524         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1525                 return false;
1526         }
1527         state = tevent_req_data(smb2req->subreq,
1528                         struct smbd_smb2_create_state);
1529         if (!state) {
1530                 return false;
1531         }
1532         /* It's not in progress if there's no timeout event. */
1533         if (!state->open_was_deferred) {
1534                 return false;
1535         }
1536
1537         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1538                         (unsigned long long)mid));
1539
1540         return true;
1541 }
1542
1543 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1544                                                         uint64_t mid)
1545 {
1546         struct smbd_smb2_create_state *state = NULL;
1547
1548         if (!smb2req->subreq) {
1549                 return;
1550         }
1551         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1552                 return;
1553         }
1554         state = tevent_req_data(smb2req->subreq,
1555                         struct smbd_smb2_create_state);
1556         if (!state) {
1557                 return;
1558         }
1559
1560         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1561                 "mid %llu\n",
1562                 (unsigned long long)mid ));
1563
1564         state->open_was_deferred = false;
1565         /* Ensure we don't have any outstanding timer event. */
1566         TALLOC_FREE(state->te);
1567         /* Ensure we don't have any outstanding immediate event. */
1568         TALLOC_FREE(state->im);
1569 }
1570
1571 void remove_deferred_open_message_smb2(
1572         struct smbXsrv_connection *xconn, uint64_t mid)
1573 {
1574         struct smbd_smb2_request *smb2req;
1575
1576         smb2req = find_open_smb2req(xconn, mid);
1577
1578         if (!smb2req) {
1579                 DEBUG(10,("remove_deferred_open_message_smb2: "
1580                         "can't find mid %llu\n",
1581                         (unsigned long long)mid ));
1582                 return;
1583         }
1584         remove_deferred_open_message_smb2_internal(smb2req, mid);
1585 }
1586
1587 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1588                                         struct tevent_immediate *im,
1589                                         void *private_data)
1590 {
1591         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1592                                         struct smbd_smb2_request);
1593         uint64_t mid = get_mid_from_smb2req(smb2req);
1594         NTSTATUS status;
1595
1596         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1597                 "re-dispatching mid %llu\n",
1598                 (unsigned long long)mid ));
1599
1600         status = smbd_smb2_request_dispatch(smb2req);
1601         if (!NT_STATUS_IS_OK(status)) {
1602                 smbd_server_connection_terminate(smb2req->xconn,
1603                                                  nt_errstr(status));
1604                 return;
1605         }
1606 }
1607
1608 bool schedule_deferred_open_message_smb2(
1609         struct smbXsrv_connection *xconn, uint64_t mid)
1610 {
1611         struct smbd_smb2_create_state *state = NULL;
1612         struct smbd_smb2_request *smb2req;
1613
1614         smb2req = find_open_smb2req(xconn, mid);
1615
1616         if (!smb2req) {
1617                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1618                         "can't find mid %llu\n",
1619                         (unsigned long long)mid ));
1620                 return false;
1621         }
1622         if (!smb2req->subreq) {
1623                 return false;
1624         }
1625         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1626                 return false;
1627         }
1628         state = tevent_req_data(smb2req->subreq,
1629                         struct smbd_smb2_create_state);
1630         if (!state) {
1631                 return false;
1632         }
1633
1634         /* Ensure we don't have any outstanding timer event. */
1635         TALLOC_FREE(state->te);
1636         /* Ensure we don't have any outstanding immediate event. */
1637         TALLOC_FREE(state->im);
1638
1639         /*
1640          * This is subtle. We must null out the callback
1641          * before rescheduling, else the first call to
1642          * tevent_req_nterror() causes the _receive()
1643          * function to be called, this causing tevent_req_post()
1644          * to crash.
1645          */
1646         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1647
1648         state->im = tevent_create_immediate(smb2req);
1649         if (!state->im) {
1650                 smbd_server_connection_terminate(smb2req->xconn,
1651                         nt_errstr(NT_STATUS_NO_MEMORY));
1652                 return false;
1653         }
1654
1655         DEBUG(10,("schedule_deferred_open_message_smb2: "
1656                 "re-processing mid %llu\n",
1657                 (unsigned long long)mid ));
1658
1659         tevent_schedule_immediate(state->im,
1660                         smb2req->sconn->ev_ctx,
1661                         smbd_smb2_create_request_dispatch_immediate,
1662                         smb2req);
1663
1664         return true;
1665 }
1666
1667 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1668 {
1669         struct smbd_smb2_request *smb2req = NULL;
1670         struct smbd_smb2_create_state *state = tevent_req_data(req,
1671                                 struct smbd_smb2_create_state);
1672         uint64_t mid;
1673
1674         if (!state) {
1675                 return false;
1676         }
1677
1678         if (!state->smb2req) {
1679                 return false;
1680         }
1681
1682         smb2req = state->smb2req;
1683         mid = get_mid_from_smb2req(smb2req);
1684
1685         if (is_deferred_open_async(state->open_rec)) {
1686                 /* Can't cancel an async create. */
1687                 return false;
1688         }
1689
1690         remove_deferred_open_message_smb2_internal(smb2req, mid);
1691
1692         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1693         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1694         return true;
1695 }
1696
1697 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1698                                 struct timeval request_time,
1699                                 struct timeval timeout,
1700                                 struct file_id id,
1701                                 struct deferred_open_record *open_rec)
1702 {
1703         struct tevent_req *req = NULL;
1704         struct smbd_smb2_create_state *state = NULL;
1705         struct timeval end_time;
1706
1707         if (!smb2req) {
1708                 return false;
1709         }
1710         req = smb2req->subreq;
1711         if (!req) {
1712                 return false;
1713         }
1714         state = tevent_req_data(req, struct smbd_smb2_create_state);
1715         if (!state) {
1716                 return false;
1717         }
1718         state->id = id;
1719         state->request_time = request_time;
1720         state->open_rec = talloc_move(state, &open_rec);
1721
1722         /* Re-schedule us to retry on timer expiry. */
1723         end_time = timeval_sum(&request_time, &timeout);
1724
1725         DEBUG(10,("push_deferred_open_message_smb2: "
1726                 "timeout at %s\n",
1727                 timeval_string(talloc_tos(),
1728                                 &end_time,
1729                                 true) ));
1730
1731         state->open_was_deferred = true;
1732
1733         /* allow this request to be canceled */
1734         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1735
1736         return true;
1737 }