source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "printing.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "../libcli/smb/smb_common.h"
  27 #include "../librpc/gen_ndr/ndr_security.h"
  28 #include "../lib/util/tevent_ntstatus.h"
  29 #include "messages.h"
  30
  31 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
  32 {
  33         switch(in_oplock_level) {
  34         case SMB2_OPLOCK_LEVEL_NONE:
  35                 return NO_OPLOCK;
  36         case SMB2_OPLOCK_LEVEL_II:
  37                 return LEVEL_II_OPLOCK;
  38         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
  39                 return EXCLUSIVE_OPLOCK;
  40         case SMB2_OPLOCK_LEVEL_BATCH:
  41                 return BATCH_OPLOCK;
  42         case SMB2_OPLOCK_LEVEL_LEASE:
  43                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  44                         "LEASE_OPLOCK_REQUESTED\n"));
  45                 return NO_OPLOCK;
  46         default:
  47                 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
  48                         "unknown level %u\n",
  49                         (unsigned int)in_oplock_level));
  50                 return NO_OPLOCK;
  51         }
  52 }
  53
  54 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
  55 {
  56         if (BATCH_OPLOCK_TYPE(oplock_type)) {
  57                 return SMB2_OPLOCK_LEVEL_BATCH;
  58         } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
  59                 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
  60         } else if (oplock_type == LEVEL_II_OPLOCK) {
  61                 return SMB2_OPLOCK_LEVEL_II;
  62         } else {
  63                 return SMB2_OPLOCK_LEVEL_NONE;
  64         }
  65 }
  66
  67 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  68                         struct tevent_context *ev,
  69                         struct smbd_smb2_request *smb2req,
  70                         uint8_t in_oplock_level,
  71                         uint32_t in_impersonation_level,
  72                         uint32_t in_desired_access,
  73                         uint32_t in_file_attributes,
  74                         uint32_t in_share_access,
  75                         uint32_t in_create_disposition,
  76                         uint32_t in_create_options,
  77                         const char *in_name,
  78                         struct smb2_create_blobs in_context_blobs);
  79 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  80                         TALLOC_CTX *mem_ctx,
  81                         uint8_t *out_oplock_level,
  82                         uint32_t *out_create_action,
  83                         struct timespec *out_creation_ts,
  84                         struct timespec *out_last_access_ts,
  85                         struct timespec *out_last_write_ts,
  86                         struct timespec *out_change_ts,
  87                         uint64_t *out_allocation_size,
  88                         uint64_t *out_end_of_file,
  89                         uint32_t *out_file_attributes,
  90                         uint64_t *out_file_id_persistent,
  91                         uint64_t *out_file_id_volatile,
  92                         struct smb2_create_blobs *out_context_blobs);
  93
  94 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
  95 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
  96 {
  97         const uint8_t *inbody;
  98         const struct iovec *indyniov;
  99         uint8_t in_oplock_level;
 100         uint32_t in_impersonation_level;
 101         uint32_t in_desired_access;
 102         uint32_t in_file_attributes;
 103         uint32_t in_share_access;
 104         uint32_t in_create_disposition;
 105         uint32_t in_create_options;
 106         uint16_t in_name_offset;
 107         uint16_t in_name_length;
 108         DATA_BLOB in_name_buffer;
 109         char *in_name_string;
 110         size_t in_name_string_size;
 111         uint32_t name_offset = 0;
 112         uint32_t name_available_length = 0;
 113         uint32_t in_context_offset;
 114         uint32_t in_context_length;
 115         DATA_BLOB in_context_buffer;
 116         struct smb2_create_blobs in_context_blobs;
 117         uint32_t context_offset = 0;
 118         uint32_t context_available_length = 0;
 119         uint32_t dyn_offset;
 120         NTSTATUS status;
 121         bool ok;
 122         struct tevent_req *tsubreq;
 123
 124         status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 return smbd_smb2_request_error(smb2req, status);
 127         }
 128         inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
 129
 130         in_oplock_level         = CVAL(inbody, 0x03);
 131         in_impersonation_level  = IVAL(inbody, 0x04);
 132         in_desired_access       = IVAL(inbody, 0x18);
 133         in_file_attributes      = IVAL(inbody, 0x1C);
 134         in_share_access         = IVAL(inbody, 0x20);
 135         in_create_disposition   = IVAL(inbody, 0x24);
 136         in_create_options       = IVAL(inbody, 0x28);
 137         in_name_offset          = SVAL(inbody, 0x2C);
 138         in_name_length          = SVAL(inbody, 0x2E);
 139         in_context_offset       = IVAL(inbody, 0x30);
 140         in_context_length       = IVAL(inbody, 0x34);
 141
 142         /*
 143          * First check if the dynamic name and context buffers
 144          * are correctly specified.
 145          *
 146          * Note: That we don't check if the name and context buffers
 147          *       overlap
 148          */
 149
 150         dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
 151
 152         if (in_name_offset == 0 && in_name_length == 0) {
 153                 /* This is ok */
 154                 name_offset = 0;
 155         } else if (in_name_offset < dyn_offset) {
 156                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 157         } else {
 158                 name_offset = in_name_offset - dyn_offset;
 159         }
 160
 161         indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
 162
 163         if (name_offset > indyniov->iov_len) {
 164                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 165         }
 166
 167         name_available_length = indyniov->iov_len - name_offset;
 168
 169         if (in_name_length > name_available_length) {
 170                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 171         }
 172
 173         in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
 174         in_name_buffer.length = in_name_length;
 175
 176         if (in_context_offset == 0 && in_context_length == 0) {
 177                 /* This is ok */
 178                 context_offset = 0;
 179         } else if (in_context_offset < dyn_offset) {
 180                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 181         } else {
 182                 context_offset = in_context_offset - dyn_offset;
 183         }
 184
 185         if (context_offset > indyniov->iov_len) {
 186                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 187         }
 188
 189         context_available_length = indyniov->iov_len - context_offset;
 190
 191         if (in_context_length > context_available_length) {
 192                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 193         }
 194
 195         in_context_buffer.data = (uint8_t *)indyniov->iov_base +
 196                 context_offset;
 197         in_context_buffer.length = in_context_length;
 198
 199         /*
 200          * Now interpret the name and context buffers
 201          */
 202
 203         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 204                                    in_name_buffer.data,
 205                                    in_name_buffer.length,
 206                                    &in_name_string,
 207                                    &in_name_string_size);
 208         if (!ok) {
 209                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 210         }
 211
 212         if (in_name_buffer.length == 0) {
 213                 in_name_string_size = 0;
 214         }
 215
 216         if (strlen(in_name_string) != in_name_string_size) {
 217                 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
 218         }
 219
 220         ZERO_STRUCT(in_context_blobs);
 221         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 222         if (!NT_STATUS_IS_OK(status)) {
 223                 return smbd_smb2_request_error(smb2req, status);
 224         }
 225
 226         tsubreq = smbd_smb2_create_send(smb2req,
 227                                        smb2req->sconn->ev_ctx,
 228                                        smb2req,
 229                                        in_oplock_level,
 230                                        in_impersonation_level,
 231                                        in_desired_access,
 232                                        in_file_attributes,
 233                                        in_share_access,
 234                                        in_create_disposition,
 235                                        in_create_options,
 236                                        in_name_string,
 237                                        in_context_blobs);
 238         if (tsubreq == NULL) {
 239                 smb2req->subreq = NULL;
 240                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 241         }
 242         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 243
 244         /*
 245          * For now we keep the logic that we do not send STATUS_PENDING
 246          * for sharing violations, so we just wait 2 seconds.
 247          *
 248          * TODO: we need more tests for this.
 249          */
 250         return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
 251 }
 252
 253 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 254 {
 255         uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
 256         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 257 }
 258
 259 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 260 {
 261         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 262                                         struct smbd_smb2_request);
 263         DATA_BLOB outbody;
 264         DATA_BLOB outdyn;
 265         uint8_t out_oplock_level = 0;
 266         uint32_t out_create_action = 0;
 267         connection_struct *conn = smb2req->tcon->compat;
 268         struct timespec out_creation_ts = { 0, };
 269         struct timespec out_last_access_ts = { 0, };
 270         struct timespec out_last_write_ts = { 0, };
 271         struct timespec out_change_ts = { 0, };
 272         uint64_t out_allocation_size = 0;
 273         uint64_t out_end_of_file = 0;
 274         uint32_t out_file_attributes = 0;
 275         uint64_t out_file_id_persistent = 0;
 276         uint64_t out_file_id_volatile = 0;
 277         struct smb2_create_blobs out_context_blobs;
 278         DATA_BLOB out_context_buffer;
 279         uint16_t out_context_buffer_offset = 0;
 280         NTSTATUS status;
 281         NTSTATUS error; /* transport error */
 282
 283         status = smbd_smb2_create_recv(tsubreq,
 284                                        smb2req,
 285                                        &out_oplock_level,
 286                                        &out_create_action,
 287                                        &out_creation_ts,
 288                                        &out_last_access_ts,
 289                                        &out_last_write_ts,
 290                                        &out_change_ts,
 291                                        &out_allocation_size,
 292                                        &out_end_of_file,
 293                                        &out_file_attributes,
 294                                        &out_file_id_persistent,
 295                                        &out_file_id_volatile,
 296                                        &out_context_blobs);
 297         if (!NT_STATUS_IS_OK(status)) {
 298                 error = smbd_smb2_request_error(smb2req, status);
 299                 if (!NT_STATUS_IS_OK(error)) {
 300                         smbd_server_connection_terminate(smb2req->sconn,
 301                                                          nt_errstr(error));
 302                         return;
 303                 }
 304                 return;
 305         }
 306
 307         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 308         if (!NT_STATUS_IS_OK(status)) {
 309                 error = smbd_smb2_request_error(smb2req, status);
 310                 if (!NT_STATUS_IS_OK(error)) {
 311                         smbd_server_connection_terminate(smb2req->sconn,
 312                                                          nt_errstr(error));
 313                         return;
 314                 }
 315                 return;
 316         }
 317
 318         if (out_context_buffer.length > 0) {
 319                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 320         }
 321
 322         outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
 323         if (outbody.data == NULL) {
 324                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 325                 if (!NT_STATUS_IS_OK(error)) {
 326                         smbd_server_connection_terminate(smb2req->sconn,
 327                                                          nt_errstr(error));
 328                         return;
 329                 }
 330                 return;
 331         }
 332
 333         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 334         SCVAL(outbody.data, 0x02,
 335               out_oplock_level);                /* oplock level */
 336         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 337         SIVAL(outbody.data, 0x04,
 338               out_create_action);               /* create action */
 339         put_long_date_timespec(conn->ts_res,
 340               (char *)outbody.data + 0x08,
 341               out_creation_ts);                 /* creation time */
 342         put_long_date_timespec(conn->ts_res,
 343               (char *)outbody.data + 0x10,
 344               out_last_access_ts);              /* last access time */
 345         put_long_date_timespec(conn->ts_res,
 346               (char *)outbody.data + 0x18,
 347               out_last_write_ts);               /* last write time */
 348         put_long_date_timespec(conn->ts_res,
 349               (char *)outbody.data + 0x20,
 350               out_change_ts);                   /* change time */
 351         SBVAL(outbody.data, 0x28,
 352               out_allocation_size);             /* allocation size */
 353         SBVAL(outbody.data, 0x30,
 354               out_end_of_file);                 /* end of file */
 355         SIVAL(outbody.data, 0x38,
 356               out_file_attributes);             /* file attributes */
 357         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 358         SBVAL(outbody.data, 0x40,
 359               out_file_id_persistent);          /* file id (persistent) */
 360         SBVAL(outbody.data, 0x48,
 361               out_file_id_volatile);            /* file id (volatile) */
 362         SIVAL(outbody.data, 0x50,
 363               out_context_buffer_offset);       /* create contexts offset */
 364         SIVAL(outbody.data, 0x54,
 365               out_context_buffer.length);       /* create contexts length */
 366
 367         outdyn = out_context_buffer;
 368
 369         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 370         if (!NT_STATUS_IS_OK(error)) {
 371                 smbd_server_connection_terminate(smb2req->sconn,
 372                                                  nt_errstr(error));
 373                 return;
 374         }
 375 }
 376
 377 struct smbd_smb2_create_state {
 378         struct smbd_smb2_request *smb2req;
 379         struct smb_request *smb1req;
 380         bool open_was_deferred;
 381         struct tevent_timer *te;
 382         struct tevent_immediate *im;
 383         struct timeval request_time;
 384         struct file_id id;
 385         DATA_BLOB private_data;
 386         uint8_t out_oplock_level;
 387         uint32_t out_create_action;
 388         struct timespec out_creation_ts;
 389         struct timespec out_last_access_ts;
 390         struct timespec out_last_write_ts;
 391         struct timespec out_change_ts;
 392         uint64_t out_allocation_size;
 393         uint64_t out_end_of_file;
 394         uint32_t out_file_attributes;
 395         uint64_t out_file_id_persistent;
 396         uint64_t out_file_id_volatile;
 397         struct smb2_create_blobs out_context_blobs;
 398 };
 399
 400 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 401                         struct tevent_context *ev,
 402                         struct smbd_smb2_request *smb2req,
 403                         uint8_t in_oplock_level,
 404                         uint32_t in_impersonation_level,
 405                         uint32_t in_desired_access,
 406                         uint32_t in_file_attributes,
 407                         uint32_t in_share_access,
 408                         uint32_t in_create_disposition,
 409                         uint32_t in_create_options,
 410                         const char *in_name,
 411                         struct smb2_create_blobs in_context_blobs)
 412 {
 413         struct tevent_req *req = NULL;
 414         struct smbd_smb2_create_state *state = NULL;
 415         NTSTATUS status;
 416         struct smb_request *smb1req = NULL;
 417         files_struct *result = NULL;
 418         int info;
 419         struct smb2_create_blobs out_context_blobs;
 420         int requested_oplock_level;
 421         struct smb2_create_blob *dhnc = NULL;
 422         struct smb2_create_blob *dh2c = NULL;
 423         struct smb2_create_blob *dhnq = NULL;
 424         struct smb2_create_blob *dh2q = NULL;
 425         struct smbXsrv_open *op = NULL;
 426
 427         ZERO_STRUCT(out_context_blobs);
 428
 429         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
 430                 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 431         } else {
 432                 requested_oplock_level = in_oplock_level;
 433         }
 434
 435
 436         if (smb2req->subreq == NULL) {
 437                 /* New create call. */
 438                 req = tevent_req_create(mem_ctx, &state,
 439                                 struct smbd_smb2_create_state);
 440                 if (req == NULL) {
 441                         return NULL;
 442                 }
 443                 state->smb2req = smb2req;
 444
 445                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 446                 if (tevent_req_nomem(smb1req, req)) {
 447                         return tevent_req_post(req, ev);
 448                 }
 449                 state->smb1req = smb1req;
 450                 smb2req->subreq = req;
 451                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 452                         in_name));
 453         } else {
 454                 /* Re-entrant create call. */
 455                 req = smb2req->subreq;
 456                 state = tevent_req_data(req,
 457                                 struct smbd_smb2_create_state);
 458                 smb1req = state->smb1req;
 459                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 460                         in_name ));
 461         }
 462
 463         dhnq = smb2_create_blob_find(&in_context_blobs,
 464                                      SMB2_CREATE_TAG_DHNQ);
 465         dhnc = smb2_create_blob_find(&in_context_blobs,
 466                                      SMB2_CREATE_TAG_DHNC);
 467         dh2q = smb2_create_blob_find(&in_context_blobs,
 468                                      SMB2_CREATE_TAG_DH2Q);
 469         dh2c = smb2_create_blob_find(&in_context_blobs,
 470                                      SMB2_CREATE_TAG_DH2C);
 471
 472         if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
 473             (dh2q && dh2c))
 474         {
 475                 /* not both are allowed at the same time */
 476                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 477                 return tevent_req_post(req, ev);
 478         }
 479
 480         if (dhnc) {
 481                 uint32_t num_blobs_allowed;
 482
 483                 if (dhnc->data.length != 16) {
 484                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 485                         return tevent_req_post(req, ev);
 486                 }
 487
 488                 /*
 489                  * According to MS-SMB2: 3.3.5.9.7, "Handling the
 490                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
 491                  * we should ignore an additional dhnq blob, but fail
 492                  * the request (with status OBJECT_NAME_NOT_FOUND) if
 493                  * any other extra create blob has been provided.
 494                  *
 495                  * (Note that the cases of an additional dh2q or dh2c blob
 496                  *  which require a different error code, have been treated
 497                  *  above.)
 498                  *
 499                  * TODO:
 500                  * This is only true for the oplock case:
 501                  * For leases, lease request is required additionally.
 502                  */
 503
 504                 if (dhnq) {
 505                         num_blobs_allowed = 2;
 506                 } else {
 507                         num_blobs_allowed = 1;
 508                 }
 509
 510                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 511                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 512                         return tevent_req_post(req, ev);
 513                 }
 514         }
 515
 516         if (dh2c) {
 517                 uint32_t num_blobs_allowed;
 518
 519                 if (dh2c->data.length != 36) {
 520                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 521                         return tevent_req_post(req, ev);
 522                 }
 523
 524                 /*
 525                  * According to MS-SMB2: 3.3.5.9.12, "Handling the
 526                  * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
 527                  * we should fail the request with status
 528                  * OBJECT_NAME_NOT_FOUND if any other create blob has been
 529                  * provided.
 530                  *
 531                  * (Note that the cases of an additional dhnq, dhnc or dh2q
 532                  *  blob which require a different error code, have been
 533                  *  treated above.)
 534                  *
 535                  * TODO:
 536                  * This is only true for the oplock case:
 537                  * For leases, lease request is required additionally!
 538                  */
 539
 540                 num_blobs_allowed = 1;
 541
 542                 if (in_context_blobs.num_blobs != num_blobs_allowed) {
 543                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 544                         return tevent_req_post(req, ev);
 545                 }
 546         }
 547
 548         if (IS_IPC(smb1req->conn)) {
 549                 const char *pipe_name = in_name;
 550
 551                 if (dhnc || dh2c) {
 552                         /* durable handles are not supported on IPC$ */
 553                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 554                         return tevent_req_post(req, ev);
 555                 }
 556
 557                 if (!lp_nt_pipe_support()) {
 558                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 559                         return tevent_req_post(req, ev);
 560                 }
 561
 562                 status = open_np_file(smb1req, pipe_name, &result);
 563                 if (!NT_STATUS_IS_OK(status)) {
 564                         tevent_req_nterror(req, status);
 565                         return tevent_req_post(req, ev);
 566                 }
 567                 info = FILE_WAS_OPENED;
 568         } else if (CAN_PRINT(smb1req->conn)) {
 569                 if (dhnc || dh2c) {
 570                         /* durable handles are not supported on printers */
 571                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 572                         return tevent_req_post(req, ev);
 573                 }
 574
 575                 status = file_new(smb1req, smb1req->conn, &result);
 576                 if(!NT_STATUS_IS_OK(status)) {
 577                         tevent_req_nterror(req, status);
 578                         return tevent_req_post(req, ev);
 579                 }
 580
 581                 status = print_spool_open(result, in_name,
 582                                           smb1req->vuid);
 583                 if (!NT_STATUS_IS_OK(status)) {
 584                         file_free(smb1req, result);
 585                         tevent_req_nterror(req, status);
 586                         return tevent_req_post(req, ev);
 587                 }
 588                 info = FILE_WAS_CREATED;
 589         } else {
 590                 char *fname;
 591                 struct smb2_create_blob *exta = NULL;
 592                 struct ea_list *ea_list = NULL;
 593                 struct smb2_create_blob *mxac = NULL;
 594                 NTTIME max_access_time = 0;
 595                 struct smb2_create_blob *secd = NULL;
 596                 struct security_descriptor *sec_desc = NULL;
 597                 struct smb2_create_blob *alsi = NULL;
 598                 uint64_t allocation_size = 0;
 599                 struct smb2_create_blob *twrp = NULL;
 600                 struct smb2_create_blob *qfid = NULL;
 601                 struct GUID _create_guid = GUID_zero();
 602                 struct GUID *create_guid = NULL;
 603                 bool update_open = false;
 604                 bool durable_requested = false;
 605                 uint32_t durable_timeout_msec = 0;
 606                 bool do_durable_reconnect = false;
 607                 uint64_t persistent_id = 0;
 608
 609                 exta = smb2_create_blob_find(&in_context_blobs,
 610                                              SMB2_CREATE_TAG_EXTA);
 611                 mxac = smb2_create_blob_find(&in_context_blobs,
 612                                              SMB2_CREATE_TAG_MXAC);
 613                 secd = smb2_create_blob_find(&in_context_blobs,
 614                                              SMB2_CREATE_TAG_SECD);
 615                 alsi = smb2_create_blob_find(&in_context_blobs,
 616                                              SMB2_CREATE_TAG_ALSI);
 617                 twrp = smb2_create_blob_find(&in_context_blobs,
 618                                              SMB2_CREATE_TAG_TWRP);
 619                 qfid = smb2_create_blob_find(&in_context_blobs,
 620                                              SMB2_CREATE_TAG_QFID);
 621
 622                 fname = talloc_strdup(state, in_name);
 623                 if (tevent_req_nomem(fname, req)) {
 624                         return tevent_req_post(req, ev);
 625                 }
 626
 627                 if (exta) {
 628                         ea_list = read_nttrans_ea_list(mem_ctx,
 629                                 (const char *)exta->data.data, exta->data.length);
 630                         if (!ea_list) {
 631                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 632                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 633                                 return tevent_req_post(req, ev);
 634                         }
 635
 636                         if (ea_list_has_invalid_name(ea_list)) {
 637                                 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
 638                                 return tevent_req_post(req, ev);
 639                         }
 640                 }
 641
 642                 if (mxac) {
 643                         if (mxac->data.length == 0) {
 644                                 max_access_time = 0;
 645                         } else if (mxac->data.length == 8) {
 646                                 max_access_time = BVAL(mxac->data.data, 0);
 647                         } else {
 648                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 649                                 return tevent_req_post(req, ev);
 650                         }
 651                 }
 652
 653                 if (secd) {
 654                         enum ndr_err_code ndr_err;
 655
 656                         sec_desc = talloc_zero(state, struct security_descriptor);
 657                         if (tevent_req_nomem(sec_desc, req)) {
 658                                 return tevent_req_post(req, ev);
 659                         }
 660
 661                         ndr_err = ndr_pull_struct_blob(&secd->data,
 662                                 sec_desc, sec_desc,
 663                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 664                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 665                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 666                                          ndr_errstr(ndr_err)));
 667                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 668                                 return tevent_req_post(req, ev);
 669                         }
 670                 }
 671
 672                 if (dhnq) {
 673                         if (dhnq->data.length != 16) {
 674                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 675                                 return tevent_req_post(req, ev);
 676                         }
 677
 678                         if (dh2q) {
 679                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 680                                 return tevent_req_post(req, ev);
 681                         }
 682
 683                         /*
 684                          * durable handle request is processed below.
 685                          */
 686                         durable_requested = true;
 687                         /*
 688                          * Set the timeout to 16 mins.
 689                          *
 690                          * TODO: test this against Windows 2012
 691                          *       as the default for durable v2 is 1 min.
 692                          */
 693                         durable_timeout_msec = (16*60*1000);
 694                 }
 695
 696                 if (dh2q) {
 697                         const uint8_t *p = dh2q->data.data;
 698                         uint32_t durable_v2_timeout = 0;
 699                         DATA_BLOB create_guid_blob;
 700
 701                         if (dh2q->data.length != 32) {
 702                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 703                                 return tevent_req_post(req, ev);
 704                         }
 705
 706                         if (dhnq) {
 707                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 708                                 return tevent_req_post(req, ev);
 709                         }
 710
 711                         durable_v2_timeout = IVAL(p, 0);
 712                         create_guid_blob = data_blob_const(p + 16, 16);
 713
 714                         status = GUID_from_ndr_blob(&create_guid_blob,
 715                                                     &_create_guid);
 716                         if (tevent_req_nterror(req, status)) {
 717                                 return tevent_req_post(req, ev);
 718                         }
 719                         create_guid = &_create_guid;
 720                         /*
 721                          * we need to store the create_guid later
 722                          */
 723                         update_open = true;
 724
 725                         /*
 726                          * durable handle v2 request processed below
 727                          */
 728                         durable_requested = true;
 729                         durable_timeout_msec = durable_v2_timeout;
 730                         if (durable_timeout_msec == 0) {
 731                                 /*
 732                                  * Set the timeout to 1 min as default.
 733                                  *
 734                                  * This matches Windows 2012.
 735                                  */
 736                                 durable_timeout_msec = (60*1000);
 737                         }
 738                 }
 739
 740                 if (dhnc) {
 741                         persistent_id = BVAL(dhnc->data.data, 0);
 742
 743                         do_durable_reconnect = true;
 744                 }
 745
 746                 if (dh2c) {
 747                         const uint8_t *p = dh2c->data.data;
 748                         DATA_BLOB create_guid_blob;
 749
 750                         persistent_id = BVAL(p, 0);
 751                         create_guid_blob = data_blob_const(p + 16, 16);
 752
 753                         status = GUID_from_ndr_blob(&create_guid_blob,
 754                                                     &_create_guid);
 755                         if (tevent_req_nterror(req, status)) {
 756                                 return tevent_req_post(req, ev);
 757                         }
 758                         create_guid = &_create_guid;
 759
 760                         do_durable_reconnect = true;
 761                 }
 762
 763                 if (alsi) {
 764                         if (alsi->data.length != 8) {
 765                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 766                                 return tevent_req_post(req, ev);
 767                         }
 768                         allocation_size = BVAL(alsi->data.data, 0);
 769                 }
 770
 771                 if (twrp) {
 772                         NTTIME nttime;
 773                         time_t t;
 774                         struct tm *tm;
 775
 776                         if (twrp->data.length != 8) {
 777                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 778                                 return tevent_req_post(req, ev);
 779                         }
 780
 781                         nttime = BVAL(twrp->data.data, 0);
 782                         t = nt_time_to_unix(nttime);
 783                         tm = gmtime(&t);
 784
 785                         TALLOC_FREE(fname);
 786                         fname = talloc_asprintf(state,
 787                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 788                                         tm->tm_year + 1900,
 789                                         tm->tm_mon + 1,
 790                                         tm->tm_mday,
 791                                         tm->tm_hour,
 792                                         tm->tm_min,
 793                                         tm->tm_sec,
 794                                         in_name);
 795                         if (tevent_req_nomem(fname, req)) {
 796                                 return tevent_req_post(req, ev);
 797                         }
 798                 }
 799
 800                 if (qfid) {
 801                         if (qfid->data.length != 0) {
 802                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 803                                 return tevent_req_post(req, ev);
 804                         }
 805                 }
 806
 807                 /* these are ignored for SMB2 */
 808                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 809                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 810
 811                 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 812
 813                 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
 814
 815                 /*
 816                  * For the backend file open procedure, there are
 817                  * two possible modes: durable_reconnect or not.
 818                  */
 819                 if (do_durable_reconnect) {
 820                         DATA_BLOB new_cookie = data_blob_null;
 821                         NTTIME now = timeval_to_nttime(&smb2req->request_time);
 822
 823                         status = smb2srv_open_recreate(smb2req->sconn->conn,
 824                                                 smb1req->conn->session_info,
 825                                                 persistent_id, create_guid,
 826                                                 now, &op);
 827                         if (!NT_STATUS_IS_OK(status)) {
 828                                 DEBUG(3, ("smbd_smb2_create_send: "
 829                                           "smb2srv_open_recreate failed: %s\n",
 830                                           nt_errstr(status)));
 831                                 tevent_req_nterror(req, status);
 832                                 return tevent_req_post(req, ev);
 833                         }
 834
 835                         DEBUG(10, ("smb2_create_send: %s to recreate the "
 836                                    "smb2srv_open struct for a durable handle.\n",
 837                                    op->global->durable ? "succeded" : "failed"));
 838
 839                         if (!op->global->durable) {
 840                                 talloc_free(op);
 841                                 tevent_req_nterror(req,
 842                                         NT_STATUS_OBJECT_NAME_NOT_FOUND);
 843                                 return tevent_req_post(req, ev);
 844                         }
 845
 846                         status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
 847                                                 smb1req,
 848                                                 op, /* smbXsrv_open input */
 849                                                 op->global->backend_cookie,
 850                                                 op, /* TALLOC_CTX */
 851                                                 &result, &new_cookie);
 852                         if (!NT_STATUS_IS_OK(status)) {
 853                                 NTSTATUS return_status;
 854
 855                                 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 856
 857                                 DEBUG(3, ("smbd_smb2_create_send: "
 858                                           "durable_reconnect failed: %s => %s\n",
 859                                           nt_errstr(status),
 860                                           nt_errstr(return_status)));
 861
 862                                 tevent_req_nterror(req, return_status);
 863                                 return tevent_req_post(req, ev);
 864                         }
 865
 866                         data_blob_free(&op->global->backend_cookie);
 867                         op->global->backend_cookie = new_cookie;
 868
 869                         op->status = NT_STATUS_OK;
 870                         op->global->disconnect_time = 0;
 871
 872                         /* save the timout for later update */
 873                         durable_timeout_msec = op->global->durable_timeout_msec;
 874
 875                         update_open = true;
 876
 877                         info = FILE_WAS_OPENED;
 878                 } else {
 879                         struct smb_filename *smb_fname = NULL;
 880
 881                         /*
 882                          * For a DFS path the function parse_dfs_path()
 883                          * will do the path processing.
 884                          */
 885
 886                         if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
 887                                 /* convert '\\' into '/' */
 888                                 status = check_path_syntax(fname);
 889                                 if (!NT_STATUS_IS_OK(status)) {
 890                                         tevent_req_nterror(req, status);
 891                                         return tevent_req_post(req, ev);
 892                                 }
 893                         }
 894
 895                         status = filename_convert(req,
 896                                                   smb1req->conn,
 897                                                   smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 898                                                   fname,
 899                                                   UCF_PREP_CREATEFILE,
 900                                                   NULL, /* ppath_contains_wcards */
 901                                                   &smb_fname);
 902                         if (!NT_STATUS_IS_OK(status)) {
 903                                 tevent_req_nterror(req, status);
 904                                 return tevent_req_post(req, ev);
 905                         }
 906
 907                         status = SMB_VFS_CREATE_FILE(smb1req->conn,
 908                                                      smb1req,
 909                                                      0, /* root_dir_fid */
 910                                                      smb_fname,
 911                                                      in_desired_access,
 912                                                      in_share_access,
 913                                                      in_create_disposition,
 914                                                      in_create_options,
 915                                                      in_file_attributes,
 916                                                      map_smb2_oplock_levels_to_samba(requested_oplock_level),
 917                                                      allocation_size,
 918                                                      0, /* private_flags */
 919                                                      sec_desc,
 920                                                      ea_list,
 921                                                      &result,
 922                                                      &info);
 923                         if (!NT_STATUS_IS_OK(status)) {
 924                                 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
 925                                         return req;
 926                                 }
 927                                 tevent_req_nterror(req, status);
 928                                 return tevent_req_post(req, ev);
 929                         }
 930                         op = result->op;
 931                 }
 932
 933                 /*
 934                  * here we have op == result->op
 935                  */
 936
 937                 DEBUG(10, ("smbd_smb2_create_send: "
 938                            "response construction phase\n"));
 939
 940                 if (mxac) {
 941                         NTTIME last_write_time;
 942
 943                         unix_timespec_to_nt_time(&last_write_time,
 944                                                  result->fsp_name->st.st_ex_mtime);
 945                         if (last_write_time != max_access_time) {
 946                                 uint8_t p[8];
 947                                 uint32_t max_access_granted;
 948                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 949
 950                                 status = smbd_calculate_access_mask(smb1req->conn,
 951                                                         result->fsp_name,
 952                                                         false,
 953                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 954                                                         &max_access_granted);
 955
 956                                 SIVAL(p, 0, NT_STATUS_V(status));
 957                                 SIVAL(p, 4, max_access_granted);
 958
 959                                 status = smb2_create_blob_add(state,
 960                                                         &out_context_blobs,
 961                                                         SMB2_CREATE_TAG_MXAC,
 962                                                         blob);
 963                                 if (!NT_STATUS_IS_OK(status)) {
 964                                         tevent_req_nterror(req, status);
 965                                         return tevent_req_post(req, ev);
 966                                 }
 967                         }
 968                 }
 969
 970                 if (durable_requested &&
 971                     BATCH_OPLOCK_TYPE(result->oplock_type))
 972                 {
 973                         status = SMB_VFS_DURABLE_COOKIE(result,
 974                                                 op,
 975                                                 &op->global->backend_cookie);
 976                         if (!NT_STATUS_IS_OK(status)) {
 977                                 op->global->backend_cookie = data_blob_null;
 978                         }
 979                 }
 980                 if (op->global->backend_cookie.length > 0) {
 981                         update_open = true;
 982
 983                         op->global->durable = true;
 984                         op->global->durable_timeout_msec = durable_timeout_msec;
 985                 }
 986
 987                 if (update_open) {
 988                         op->global->create_guid = _create_guid;
 989
 990                         status = smbXsrv_open_update(op);
 991                         DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
 992                                    "returned %s\n",
 993                                    nt_errstr(status)));
 994                         if (!NT_STATUS_IS_OK(status)) {
 995                                 tevent_req_nterror(req, status);
 996                                 return tevent_req_post(req, ev);
 997                         }
 998                 }
 999
1000                 if (dhnq && op->global->durable) {
1001                         uint8_t p[8] = { 0, };
1002                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1003
1004                         status = smb2_create_blob_add(state,
1005                                                       &out_context_blobs,
1006                                                       SMB2_CREATE_TAG_DHNQ,
1007                                                       blob);
1008                         if (!NT_STATUS_IS_OK(status)) {
1009                                 tevent_req_nterror(req, status);
1010                                 return tevent_req_post(req, ev);
1011                         }
1012                 }
1013
1014                 if (dh2q && op->global->durable) {
1015                         uint8_t p[8] = { 0, };
1016                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1017                         uint32_t durable_v2_response_flags = 0;
1018
1019                         SIVAL(p, 0, op->global->durable_timeout_msec);
1020                         SIVAL(p, 4, durable_v2_response_flags);
1021
1022                         status = smb2_create_blob_add(state, &out_context_blobs,
1023                                                       SMB2_CREATE_TAG_DH2Q,
1024                                                       blob);
1025                         if (!NT_STATUS_IS_OK(status)) {
1026                                 tevent_req_nterror(req, status);
1027                                 return tevent_req_post(req, ev);
1028                         }
1029                 }
1030
1031                 if (qfid) {
1032                         uint8_t p[32];
1033                         uint64_t file_index = get_FileIndex(result->conn,
1034                                                         &result->fsp_name->st);
1035                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
1036
1037                         ZERO_STRUCT(p);
1038
1039                         /* From conversations with Microsoft engineers at
1040                            the MS plugfest. The first 8 bytes are the "volume index"
1041                            == inode, the second 8 bytes are the "volume id",
1042                            == dev. This will be updated in the SMB2 doc. */
1043                         SBVAL(p, 0, file_index);
1044                         SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1045
1046                         status = smb2_create_blob_add(state, &out_context_blobs,
1047                                                       SMB2_CREATE_TAG_QFID,
1048                                                       blob);
1049                         if (!NT_STATUS_IS_OK(status)) {
1050                                 tevent_req_nterror(req, status);
1051                                 return tevent_req_post(req, ev);
1052                         }
1053                 }
1054         }
1055
1056         smb2req->compat_chain_fsp = smb1req->chain_fsp;
1057
1058         if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1059                 state->out_oplock_level = in_oplock_level;
1060         } else {
1061                 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1062         }
1063
1064         if ((in_create_disposition == FILE_SUPERSEDE)
1065             && (info == FILE_WAS_OVERWRITTEN)) {
1066                 state->out_create_action = FILE_WAS_SUPERSEDED;
1067         } else {
1068                 state->out_create_action = info;
1069         }
1070         state->out_file_attributes = dos_mode(result->conn,
1071                                            result->fsp_name);
1072
1073         state->out_creation_ts = get_create_timespec(smb1req->conn,
1074                                         result, result->fsp_name);
1075         state->out_last_access_ts = result->fsp_name->st.st_ex_atime;
1076         state->out_last_write_ts = result->fsp_name->st.st_ex_mtime;
1077         state->out_change_ts = get_change_timespec(smb1req->conn,
1078                                         result, result->fsp_name);
1079         state->out_allocation_size =
1080                         SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1081                                                &(result->fsp_name->st));
1082         state->out_end_of_file = result->fsp_name->st.st_ex_size;
1083         if (state->out_file_attributes == 0) {
1084                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1085         }
1086         state->out_file_id_persistent = result->op->global->open_persistent_id;
1087         state->out_file_id_volatile = result->op->global->open_volatile_id;
1088         state->out_context_blobs = out_context_blobs;
1089
1090         DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1091                   fsp_str_dbg(result), fsp_fnum_dbg(result)));
1092
1093         tevent_req_done(req);
1094         return tevent_req_post(req, ev);
1095 }
1096
1097 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1098                         TALLOC_CTX *mem_ctx,
1099                         uint8_t *out_oplock_level,
1100                         uint32_t *out_create_action,
1101                         struct timespec *out_creation_ts,
1102                         struct timespec *out_last_access_ts,
1103                         struct timespec *out_last_write_ts,
1104                         struct timespec *out_change_ts,
1105                         uint64_t *out_allocation_size,
1106                         uint64_t *out_end_of_file,
1107                         uint32_t *out_file_attributes,
1108                         uint64_t *out_file_id_persistent,
1109                         uint64_t *out_file_id_volatile,
1110                         struct smb2_create_blobs *out_context_blobs)
1111 {
1112         NTSTATUS status;
1113         struct smbd_smb2_create_state *state = tevent_req_data(req,
1114                                                struct smbd_smb2_create_state);
1115
1116         if (tevent_req_is_nterror(req, &status)) {
1117                 tevent_req_received(req);
1118                 return status;
1119         }
1120
1121         *out_oplock_level       = state->out_oplock_level;
1122         *out_create_action      = state->out_create_action;
1123         *out_creation_ts        = state->out_creation_ts;
1124         *out_last_access_ts     = state->out_last_access_ts;
1125         *out_last_write_ts      = state->out_last_write_ts;
1126         *out_change_ts          = state->out_change_ts;
1127         *out_allocation_size    = state->out_allocation_size;
1128         *out_end_of_file        = state->out_end_of_file;
1129         *out_file_attributes    = state->out_file_attributes;
1130         *out_file_id_persistent = state->out_file_id_persistent;
1131         *out_file_id_volatile   = state->out_file_id_volatile;
1132         *out_context_blobs      = state->out_context_blobs;
1133
1134         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1135
1136         tevent_req_received(req);
1137         return NT_STATUS_OK;
1138 }
1139
1140 /*********************************************************
1141  Code for dealing with deferred opens.
1142 *********************************************************/
1143
1144 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1145                         struct timeval *p_request_time,
1146                         void **pp_state)
1147 {
1148         struct smbd_smb2_create_state *state = NULL;
1149         struct tevent_req *req = NULL;
1150
1151         if (!smb2req) {
1152                 return false;
1153         }
1154         req = smb2req->subreq;
1155         if (!req) {
1156                 return false;
1157         }
1158         state = tevent_req_data(req, struct smbd_smb2_create_state);
1159         if (!state) {
1160                 return false;
1161         }
1162         if (!state->open_was_deferred) {
1163                 return false;
1164         }
1165         if (p_request_time) {
1166                 *p_request_time = state->request_time;
1167         }
1168         if (pp_state) {
1169                 *pp_state = (void *)state->private_data.data;
1170         }
1171         return true;
1172 }
1173
1174 /*********************************************************
1175  Re-process this call early - requested by message or
1176  close.
1177 *********************************************************/
1178
1179 static struct smbd_smb2_request *find_open_smb2req(
1180         struct smbd_server_connection *sconn, uint64_t mid)
1181 {
1182         struct smbd_smb2_request *smb2req;
1183
1184         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1185                 uint64_t message_id;
1186                 if (smb2req->subreq == NULL) {
1187                         /* This message has been processed. */
1188                         continue;
1189                 }
1190                 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1191                         /* This message has been processed. */
1192                         continue;
1193                 }
1194                 message_id = get_mid_from_smb2req(smb2req);
1195                 if (message_id == mid) {
1196                         return smb2req;
1197                 }
1198         }
1199         return NULL;
1200 }
1201
1202 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1203 {
1204         struct smbd_smb2_create_state *state = NULL;
1205         struct smbd_smb2_request *smb2req;
1206
1207         smb2req = find_open_smb2req(sconn, mid);
1208
1209         if (!smb2req) {
1210                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1211                         (unsigned long long)mid));
1212                 return false;
1213         }
1214         if (!smb2req->subreq) {
1215                 return false;
1216         }
1217         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1218                 return false;
1219         }
1220         state = tevent_req_data(smb2req->subreq,
1221                         struct smbd_smb2_create_state);
1222         if (!state) {
1223                 return false;
1224         }
1225         /* It's not in progress if there's no timeout event. */
1226         if (!state->open_was_deferred) {
1227                 return false;
1228         }
1229
1230         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1231                         (unsigned long long)mid));
1232
1233         return true;
1234 }
1235
1236 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1237                                                         uint64_t mid)
1238 {
1239         struct smbd_smb2_create_state *state = NULL;
1240
1241         if (!smb2req->subreq) {
1242                 return;
1243         }
1244         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1245                 return;
1246         }
1247         state = tevent_req_data(smb2req->subreq,
1248                         struct smbd_smb2_create_state);
1249         if (!state) {
1250                 return;
1251         }
1252
1253         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1254                 "mid %llu\n",
1255                 (unsigned long long)mid ));
1256
1257         state->open_was_deferred = false;
1258         /* Ensure we don't have any outstanding timer event. */
1259         TALLOC_FREE(state->te);
1260         /* Ensure we don't have any outstanding immediate event. */
1261         TALLOC_FREE(state->im);
1262 }
1263
1264 void remove_deferred_open_message_smb2(
1265         struct smbd_server_connection *sconn, uint64_t mid)
1266 {
1267         struct smbd_smb2_request *smb2req;
1268
1269         smb2req = find_open_smb2req(sconn, mid);
1270
1271         if (!smb2req) {
1272                 DEBUG(10,("remove_deferred_open_message_smb2: "
1273                         "can't find mid %llu\n",
1274                         (unsigned long long)mid ));
1275                 return;
1276         }
1277         remove_deferred_open_message_smb2_internal(smb2req, mid);
1278 }
1279
1280 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1281                                         struct tevent_immediate *im,
1282                                         void *private_data)
1283 {
1284         struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1285                                         struct smbd_smb2_request);
1286         struct smbd_server_connection *sconn = smb2req->sconn;
1287         uint64_t mid = get_mid_from_smb2req(smb2req);
1288         NTSTATUS status;
1289
1290         DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1291                 "re-dispatching mid %llu\n",
1292                 (unsigned long long)mid ));
1293
1294         status = smbd_smb2_request_dispatch(smb2req);
1295         if (!NT_STATUS_IS_OK(status)) {
1296                 smbd_server_connection_terminate(sconn, nt_errstr(status));
1297                 return;
1298         }
1299 }
1300
1301 bool schedule_deferred_open_message_smb2(
1302         struct smbd_server_connection *sconn, uint64_t mid)
1303 {
1304         struct smbd_smb2_create_state *state = NULL;
1305         struct smbd_smb2_request *smb2req;
1306
1307         smb2req = find_open_smb2req(sconn, mid);
1308
1309         if (!smb2req) {
1310                 DEBUG(10,("schedule_deferred_open_message_smb2: "
1311                         "can't find mid %llu\n",
1312                         (unsigned long long)mid ));
1313                 return false;
1314         }
1315         if (!smb2req->subreq) {
1316                 return false;
1317         }
1318         if (!tevent_req_is_in_progress(smb2req->subreq)) {
1319                 return false;
1320         }
1321         state = tevent_req_data(smb2req->subreq,
1322                         struct smbd_smb2_create_state);
1323         if (!state) {
1324                 return false;
1325         }
1326
1327         /* Ensure we don't have any outstanding timer event. */
1328         TALLOC_FREE(state->te);
1329         /* Ensure we don't have any outstanding immediate event. */
1330         TALLOC_FREE(state->im);
1331
1332         /*
1333          * This is subtle. We must null out the callback
1334          * before rescheduling, else the first call to
1335          * tevent_req_nterror() causes the _receive()
1336          * function to be called, this causing tevent_req_post()
1337          * to crash.
1338          */
1339         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1340
1341         state->im = tevent_create_immediate(smb2req);
1342         if (!state->im) {
1343                 smbd_server_connection_terminate(smb2req->sconn,
1344                         nt_errstr(NT_STATUS_NO_MEMORY));
1345                 return false;
1346         }
1347
1348         DEBUG(10,("schedule_deferred_open_message_smb2: "
1349                 "re-processing mid %llu\n",
1350                 (unsigned long long)mid ));
1351
1352         tevent_schedule_immediate(state->im,
1353                         smb2req->sconn->ev_ctx,
1354                         smbd_smb2_create_request_dispatch_immediate,
1355                         smb2req);
1356
1357         return true;
1358 }
1359
1360 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1361 {
1362         struct smbd_smb2_request *smb2req = NULL;
1363         struct smbd_smb2_create_state *state = tevent_req_data(req,
1364                                 struct smbd_smb2_create_state);
1365         uint64_t mid;
1366
1367         if (!state) {
1368                 return false;
1369         }
1370
1371         if (!state->smb2req) {
1372                 return false;
1373         }
1374
1375         smb2req = state->smb2req;
1376         mid = get_mid_from_smb2req(smb2req);
1377
1378         if (is_deferred_open_async(state->private_data.data)) {
1379                 /* Can't cancel an async create. */
1380                 return false;
1381         }
1382
1383         remove_deferred_open_message_smb2_internal(smb2req, mid);
1384
1385         tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1386         tevent_req_nterror(req, NT_STATUS_CANCELLED);
1387         return true;
1388 }
1389
1390 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1391                                 struct timeval request_time,
1392                                 struct timeval timeout,
1393                                 struct file_id id,
1394                                 char *private_data,
1395                                 size_t priv_len)
1396 {
1397         struct tevent_req *req = NULL;
1398         struct smbd_smb2_create_state *state = NULL;
1399         struct timeval end_time;
1400
1401         if (!smb2req) {
1402                 return false;
1403         }
1404         req = smb2req->subreq;
1405         if (!req) {
1406                 return false;
1407         }
1408         state = tevent_req_data(req, struct smbd_smb2_create_state);
1409         if (!state) {
1410                 return false;
1411         }
1412         state->id = id;
1413         state->request_time = request_time;
1414         state->private_data = data_blob_talloc(state, private_data,
1415                                                 priv_len);
1416         if (!state->private_data.data) {
1417                 return false;
1418         }
1419
1420         /* Re-schedule us to retry on timer expiry. */
1421         end_time = timeval_sum(&request_time, &timeout);
1422
1423         DEBUG(10,("push_deferred_open_message_smb2: "
1424                 "timeout at %s\n",
1425                 timeval_string(talloc_tos(),
1426                                 &end_time,
1427                                 true) ));
1428
1429         state->open_was_deferred = true;
1430
1431         /* allow this request to be canceled */
1432         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1433
1434         return true;
1435 }