source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   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 "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "../librpc/gen_ndr/idmap.h"
  32 #include "passdb/lookup_sid.h"
  33 #include "auth.h"
  34 #include "serverid.h"
  35 #include "messages.h"
  36 #include "source3/lib/dbwrap/dbwrap_watch.h"
  37
  38 extern const struct generic_mapping file_generic_mapping;
  39
  40 struct deferred_open_record {
  41         bool delayed_for_oplocks;
  42         bool async_open;
  43         struct file_id id;
  44 };
  45
  46 /****************************************************************************
  47  If the requester wanted DELETE_ACCESS and was rejected because
  48  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  49  overrides this.
  50 ****************************************************************************/
  51
  52 static bool parent_override_delete(connection_struct *conn,
  53                                         const struct smb_filename *smb_fname,
  54                                         uint32_t access_mask,
  55                                         uint32_t rejected_mask)
  56 {
  57         if ((access_mask & DELETE_ACCESS) &&
  58                     (rejected_mask & DELETE_ACCESS) &&
  59                     can_delete_file_in_directory(conn, smb_fname)) {
  60                 return true;
  61         }
  62         return false;
  63 }
  64
  65 /****************************************************************************
  66  Check if we have open rights.
  67 ****************************************************************************/
  68
  69 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  70                                 const struct smb_filename *smb_fname,
  71                                 bool use_privs,
  72                                 uint32_t access_mask)
  73 {
  74         /* Check if we have rights to open. */
  75         NTSTATUS status;
  76         struct security_descriptor *sd = NULL;
  77         uint32_t rejected_share_access;
  78         uint32_t rejected_mask = access_mask;
  79         uint32_t do_not_check_mask = 0;
  80
  81         rejected_share_access = access_mask & ~(conn->share_access);
  82
  83         if (rejected_share_access) {
  84                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  85                         "on %s (0x%x)\n",
  86                         (unsigned int)access_mask,
  87                         smb_fname_str_dbg(smb_fname),
  88                         (unsigned int)rejected_share_access ));
  89                 return NT_STATUS_ACCESS_DENIED;
  90         }
  91
  92         if (!use_privs && get_current_uid(conn) == (uid_t)0) {
  93                 /* I'm sorry sir, I didn't know you were root... */
  94                 DEBUG(10,("smbd_check_access_rights: root override "
  95                         "on %s. Granting 0x%x\n",
  96                         smb_fname_str_dbg(smb_fname),
  97                         (unsigned int)access_mask ));
  98                 return NT_STATUS_OK;
  99         }
 100
 101         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
 102                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 103                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
 104                         smb_fname_str_dbg(smb_fname),
 105                         (unsigned int)access_mask ));
 106                 return NT_STATUS_OK;
 107         }
 108
 109         if (access_mask == DELETE_ACCESS &&
 110                         VALID_STAT(smb_fname->st) &&
 111                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 112                 /* We can always delete a symlink. */
 113                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 114                         "on DELETE_ACCESS on symlink %s.\n",
 115                         smb_fname_str_dbg(smb_fname) ));
 116                 return NT_STATUS_OK;
 117         }
 118
 119         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 120                         (SECINFO_OWNER |
 121                         SECINFO_GROUP |
 122                          SECINFO_DACL), talloc_tos(), &sd);
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 126                         "on %s: %s\n",
 127                         smb_fname_str_dbg(smb_fname),
 128                         nt_errstr(status)));
 129
 130                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 131                         goto access_denied;
 132                 }
 133
 134                 return status;
 135         }
 136
 137         /*
 138          * If we can access the path to this file, by
 139          * default we have FILE_READ_ATTRIBUTES from the
 140          * containing directory. See the section:
 141          * "Algorithm to Check Access to an Existing File"
 142          * in MS-FSA.pdf.
 143          *
 144          * se_file_access_check() also takes care of
 145          * owner WRITE_DAC and READ_CONTROL.
 146          */
 147         do_not_check_mask = FILE_READ_ATTRIBUTES;
 148
 149         /*
 150          * Samba 3.6 and earlier granted execute access even
 151          * if the ACL did not contain execute rights.
 152          * Samba 4.0 is more correct and checks it.
 153          * The compatibilty mode allows to skip this check
 154          * to smoothen upgrades.
 155          */
 156         if (lp_acl_allow_execute_always(SNUM(conn))) {
 157                 do_not_check_mask |= FILE_EXECUTE;
 158         }
 159
 160         status = se_file_access_check(sd,
 161                                 get_current_nttok(conn),
 162                                 use_privs,
 163                                 (access_mask & ~do_not_check_mask),
 164                                 &rejected_mask);
 165
 166         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 167                 "0x%x returning 0x%x (%s)\n",
 168                 smb_fname_str_dbg(smb_fname),
 169                 (unsigned int)access_mask,
 170                 (unsigned int)rejected_mask,
 171                 nt_errstr(status) ));
 172
 173         if (!NT_STATUS_IS_OK(status)) {
 174                 if (DEBUGLEVEL >= 10) {
 175                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 176                                 smb_fname_str_dbg(smb_fname) ));
 177                         NDR_PRINT_DEBUG(security_descriptor, sd);
 178                 }
 179         }
 180
 181         TALLOC_FREE(sd);
 182
 183         if (NT_STATUS_IS_OK(status) ||
 184                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 185                 return status;
 186         }
 187
 188         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 189
 190   access_denied:
 191
 192         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 193                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 194                         !lp_store_dos_attributes(SNUM(conn)) &&
 195                         (lp_map_readonly(SNUM(conn)) ||
 196                         lp_map_archive(SNUM(conn)) ||
 197                         lp_map_hidden(SNUM(conn)) ||
 198                         lp_map_system(SNUM(conn)))) {
 199                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 200
 201                 DEBUG(10,("smbd_check_access_rights: "
 202                         "overrode "
 203                         "FILE_WRITE_ATTRIBUTES "
 204                         "on file %s\n",
 205                         smb_fname_str_dbg(smb_fname)));
 206         }
 207
 208         if (parent_override_delete(conn,
 209                                 smb_fname,
 210                                 access_mask,
 211                                 rejected_mask)) {
 212                 /* Were we trying to do an open
 213                  * for delete and didn't get DELETE
 214                  * access (only) ? Check if the
 215                  * directory allows DELETE_CHILD.
 216                  * See here:
 217                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 218                  * for details. */
 219
 220                 rejected_mask &= ~DELETE_ACCESS;
 221
 222                 DEBUG(10,("smbd_check_access_rights: "
 223                         "overrode "
 224                         "DELETE_ACCESS on "
 225                         "file %s\n",
 226                         smb_fname_str_dbg(smb_fname)));
 227         }
 228
 229         if (rejected_mask != 0) {
 230                 return NT_STATUS_ACCESS_DENIED;
 231         }
 232         return NT_STATUS_OK;
 233 }
 234
 235 static NTSTATUS check_parent_access(struct connection_struct *conn,
 236                                 struct smb_filename *smb_fname,
 237                                 uint32_t access_mask)
 238 {
 239         NTSTATUS status;
 240         char *parent_dir = NULL;
 241         struct security_descriptor *parent_sd = NULL;
 242         uint32_t access_granted = 0;
 243
 244         if (!parent_dirname(talloc_tos(),
 245                                 smb_fname->base_name,
 246                                 &parent_dir,
 247                                 NULL)) {
 248                 return NT_STATUS_NO_MEMORY;
 249         }
 250
 251         if (get_current_uid(conn) == (uid_t)0) {
 252                 /* I'm sorry sir, I didn't know you were root... */
 253                 DEBUG(10,("check_parent_access: root override "
 254                         "on %s. Granting 0x%x\n",
 255                         smb_fname_str_dbg(smb_fname),
 256                         (unsigned int)access_mask ));
 257                 return NT_STATUS_OK;
 258         }
 259
 260         status = SMB_VFS_GET_NT_ACL(conn,
 261                                 parent_dir,
 262                                 SECINFO_DACL,
 263                                     talloc_tos(),
 264                                 &parent_sd);
 265
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 268                         "%s with error %s\n",
 269                         parent_dir,
 270                         nt_errstr(status)));
 271                 return status;
 272         }
 273
 274         /*
 275          * If we can access the path to this file, by
 276          * default we have FILE_READ_ATTRIBUTES from the
 277          * containing directory. See the section:
 278          * "Algorithm to Check Access to an Existing File"
 279          * in MS-FSA.pdf.
 280          *
 281          * se_file_access_check() also takes care of
 282          * owner WRITE_DAC and READ_CONTROL.
 283          */
 284         status = se_file_access_check(parent_sd,
 285                                 get_current_nttok(conn),
 286                                 false,
 287                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 288                                 &access_granted);
 289         if(!NT_STATUS_IS_OK(status)) {
 290                 DEBUG(5,("check_parent_access: access check "
 291                         "on directory %s for "
 292                         "path %s for mask 0x%x returned (0x%x) %s\n",
 293                         parent_dir,
 294                         smb_fname->base_name,
 295                         access_mask,
 296                         access_granted,
 297                         nt_errstr(status) ));
 298                 return status;
 299         }
 300
 301         return NT_STATUS_OK;
 302 }
 303
 304 /****************************************************************************
 305  fd support routines - attempt to do a dos_open.
 306 ****************************************************************************/
 307
 308 NTSTATUS fd_open(struct connection_struct *conn,
 309                  files_struct *fsp,
 310                  int flags,
 311                  mode_t mode)
 312 {
 313         struct smb_filename *smb_fname = fsp->fsp_name;
 314         NTSTATUS status = NT_STATUS_OK;
 315
 316 #ifdef O_NOFOLLOW
 317         /*
 318          * Never follow symlinks on a POSIX client. The
 319          * client should be doing this.
 320          */
 321
 322         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 323                 flags |= O_NOFOLLOW;
 324         }
 325 #endif
 326
 327         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 328         if (fsp->fh->fd == -1) {
 329                 int posix_errno = errno;
 330 #ifdef O_NOFOLLOW
 331 #if defined(ENOTSUP) && defined(OSF1)
 332                 /* handle special Tru64 errno */
 333                 if (errno == ENOTSUP) {
 334                         posix_errno = ELOOP;
 335                 }
 336 #endif /* ENOTSUP */
 337 #ifdef EFTYPE
 338                 /* fix broken NetBSD errno */
 339                 if (errno == EFTYPE) {
 340                         posix_errno = ELOOP;
 341                 }
 342 #endif /* EFTYPE */
 343                 /* fix broken FreeBSD errno */
 344                 if (errno == EMLINK) {
 345                         posix_errno = ELOOP;
 346                 }
 347 #endif /* O_NOFOLLOW */
 348                 status = map_nt_error_from_unix(posix_errno);
 349                 if (errno == EMFILE) {
 350                         static time_t last_warned = 0L;
 351
 352                         if (time((time_t *) NULL) > last_warned) {
 353                                 DEBUG(0,("Too many open files, unable "
 354                                         "to open more!  smbd's max "
 355                                         "open files = %d\n",
 356                                         lp_max_open_files()));
 357                                 last_warned = time((time_t *) NULL);
 358                         }
 359                 }
 360
 361         }
 362
 363         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 364                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 365                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 366
 367         return status;
 368 }
 369
 370 /****************************************************************************
 371  Close the file associated with a fsp.
 372 ****************************************************************************/
 373
 374 NTSTATUS fd_close(files_struct *fsp)
 375 {
 376         int ret;
 377
 378         if (fsp->dptr) {
 379                 dptr_CloseDir(fsp);
 380         }
 381         if (fsp->fh->fd == -1) {
 382                 return NT_STATUS_OK; /* What we used to call a stat open. */
 383         }
 384         if (fsp->fh->ref_count > 1) {
 385                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 386         }
 387
 388         ret = SMB_VFS_CLOSE(fsp);
 389         fsp->fh->fd = -1;
 390         if (ret == -1) {
 391                 return map_nt_error_from_unix(errno);
 392         }
 393         return NT_STATUS_OK;
 394 }
 395
 396 /****************************************************************************
 397  Change the ownership of a file to that of the parent directory.
 398  Do this by fd if possible.
 399 ****************************************************************************/
 400
 401 void change_file_owner_to_parent(connection_struct *conn,
 402                                         const char *inherit_from_dir,
 403                                         files_struct *fsp)
 404 {
 405         struct smb_filename *smb_fname_parent;
 406         int ret;
 407
 408         smb_fname_parent = synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 409                                                NULL, NULL);
 410         if (smb_fname_parent == NULL) {
 411                 return;
 412         }
 413
 414         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 415         if (ret == -1) {
 416                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 417                          "directory %s. Error was %s\n",
 418                          smb_fname_str_dbg(smb_fname_parent),
 419                          strerror(errno)));
 420                 TALLOC_FREE(smb_fname_parent);
 421                 return;
 422         }
 423
 424         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 425                 /* Already this uid - no need to change. */
 426                 DEBUG(10,("change_file_owner_to_parent: file %s "
 427                         "is already owned by uid %d\n",
 428                         fsp_str_dbg(fsp),
 429                         (int)fsp->fsp_name->st.st_ex_uid ));
 430                 TALLOC_FREE(smb_fname_parent);
 431                 return;
 432         }
 433
 434         become_root();
 435         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 436         unbecome_root();
 437         if (ret == -1) {
 438                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 439                          "file %s to parent directory uid %u. Error "
 440                          "was %s\n", fsp_str_dbg(fsp),
 441                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 442                          strerror(errno) ));
 443         } else {
 444                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 445                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 446                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 447                 /* Ensure the uid entry is updated. */
 448                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 449         }
 450
 451         TALLOC_FREE(smb_fname_parent);
 452 }
 453
 454 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 455                                        const char *inherit_from_dir,
 456                                        const char *fname,
 457                                        SMB_STRUCT_STAT *psbuf)
 458 {
 459         struct smb_filename *smb_fname_parent;
 460         struct smb_filename *smb_fname_cwd = NULL;
 461         char *saved_dir = NULL;
 462         TALLOC_CTX *ctx = talloc_tos();
 463         NTSTATUS status = NT_STATUS_OK;
 464         int ret;
 465
 466         smb_fname_parent = synthetic_smb_fname(ctx, inherit_from_dir,
 467                                                NULL, NULL);
 468         if (smb_fname_parent == NULL) {
 469                 return NT_STATUS_NO_MEMORY;
 470         }
 471
 472         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 473         if (ret == -1) {
 474                 status = map_nt_error_from_unix(errno);
 475                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 476                          "directory %s. Error was %s\n",
 477                          smb_fname_str_dbg(smb_fname_parent),
 478                          strerror(errno)));
 479                 goto out;
 480         }
 481
 482         /* We've already done an lstat into psbuf, and we know it's a
 483            directory. If we can cd into the directory and the dev/ino
 484            are the same then we can safely chown without races as
 485            we're locking the directory in place by being in it.  This
 486            should work on any UNIX (thanks tridge :-). JRA.
 487         */
 488
 489         saved_dir = vfs_GetWd(ctx,conn);
 490         if (!saved_dir) {
 491                 status = map_nt_error_from_unix(errno);
 492                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 493                          "current working directory. Error was %s\n",
 494                          strerror(errno)));
 495                 goto out;
 496         }
 497
 498         /* Chdir into the new path. */
 499         if (vfs_ChDir(conn, fname) == -1) {
 500                 status = map_nt_error_from_unix(errno);
 501                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 502                          "current working directory to %s. Error "
 503                          "was %s\n", fname, strerror(errno) ));
 504                 goto chdir;
 505         }
 506
 507         smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL);
 508         if (smb_fname_cwd == NULL) {
 509                 status = NT_STATUS_NO_MEMORY;
 510                 goto chdir;
 511         }
 512
 513         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 514         if (ret == -1) {
 515                 status = map_nt_error_from_unix(errno);
 516                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 517                          "directory '.' (%s) Error was %s\n",
 518                          fname, strerror(errno)));
 519                 goto chdir;
 520         }
 521
 522         /* Ensure we're pointing at the same place. */
 523         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 524             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 525                 DEBUG(0,("change_dir_owner_to_parent: "
 526                          "device/inode on directory %s changed. "
 527                          "Refusing to chown !\n", fname ));
 528                 status = NT_STATUS_ACCESS_DENIED;
 529                 goto chdir;
 530         }
 531
 532         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 533                 /* Already this uid - no need to change. */
 534                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 535                         "is already owned by uid %d\n",
 536                         fname,
 537                         (int)smb_fname_cwd->st.st_ex_uid ));
 538                 status = NT_STATUS_OK;
 539                 goto chdir;
 540         }
 541
 542         become_root();
 543         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 544                             (gid_t)-1);
 545         unbecome_root();
 546         if (ret == -1) {
 547                 status = map_nt_error_from_unix(errno);
 548                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 549                           "directory %s to parent directory uid %u. "
 550                           "Error was %s\n", fname,
 551                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 552                           strerror(errno) ));
 553         } else {
 554                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 555                         "directory %s to parent directory uid %u.\n",
 556                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 557                 /* Ensure the uid entry is updated. */
 558                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 559         }
 560
 561  chdir:
 562         vfs_ChDir(conn,saved_dir);
 563  out:
 564         TALLOC_FREE(smb_fname_parent);
 565         TALLOC_FREE(smb_fname_cwd);
 566         return status;
 567 }
 568
 569 /****************************************************************************
 570  Open a file - returning a guaranteed ATOMIC indication of if the
 571  file was created or not.
 572 ****************************************************************************/
 573
 574 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
 575                         files_struct *fsp,
 576                         int flags,
 577                         mode_t mode,
 578                         bool *file_created)
 579 {
 580         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 581         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 582
 583         *file_created = false;
 584
 585         if (!(flags & O_CREAT)) {
 586                 /*
 587                  * We're not creating the file, just pass through.
 588                  */
 589                 return fd_open(conn, fsp, flags, mode);
 590         }
 591
 592         if (flags & O_EXCL) {
 593                 /*
 594                  * Fail if already exists, just pass through.
 595                  */
 596                 status = fd_open(conn, fsp, flags, mode);
 597
 598                 /*
 599                  * Here we've opened with O_CREAT|O_EXCL. If that went
 600                  * NT_STATUS_OK, we *know* we created this file.
 601                  */
 602                 *file_created = NT_STATUS_IS_OK(status);
 603
 604                 return status;
 605         }
 606
 607         /*
 608          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
 609          * To know absolutely if we created the file or not,
 610          * we can never call O_CREAT without O_EXCL. So if
 611          * we think the file existed, try without O_CREAT|O_EXCL.
 612          * If we think the file didn't exist, try with
 613          * O_CREAT|O_EXCL. Keep bouncing between these two
 614          * requests until either the file is created, or
 615          * opened. Either way, we keep going until we get
 616          * a returnable result (error, or open/create).
 617          */
 618
 619         while(1) {
 620                 int curr_flags = flags;
 621
 622                 if (file_existed) {
 623                         /* Just try open, do not create. */
 624                         curr_flags &= ~(O_CREAT);
 625                         status = fd_open(conn, fsp, curr_flags, mode);
 626                         if (NT_STATUS_EQUAL(status,
 627                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 628                                 /*
 629                                  * Someone deleted it in the meantime.
 630                                  * Retry with O_EXCL.
 631                                  */
 632                                 file_existed = false;
 633                                 DEBUG(10,("fd_open_atomic: file %s existed. "
 634                                         "Retry.\n",
 635                                         smb_fname_str_dbg(fsp->fsp_name)));
 636                                         continue;
 637                         }
 638                 } else {
 639                         /* Try create exclusively, fail if it exists. */
 640                         curr_flags |= O_EXCL;
 641                         status = fd_open(conn, fsp, curr_flags, mode);
 642                         if (NT_STATUS_EQUAL(status,
 643                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
 644                                 /*
 645                                  * Someone created it in the meantime.
 646                                  * Retry without O_CREAT.
 647                                  */
 648                                 file_existed = true;
 649                                 DEBUG(10,("fd_open_atomic: file %s "
 650                                         "did not exist. Retry.\n",
 651                                         smb_fname_str_dbg(fsp->fsp_name)));
 652                                 continue;
 653                         }
 654                         if (NT_STATUS_IS_OK(status)) {
 655                                 /*
 656                                  * Here we've opened with O_CREAT|O_EXCL
 657                                  * and got success. We *know* we created
 658                                  * this file.
 659                                  */
 660                                 *file_created = true;
 661                         }
 662                 }
 663                 /* Create is done, or failed. */
 664                 break;
 665         }
 666         return status;
 667 }
 668
 669 /****************************************************************************
 670  Open a file.
 671 ****************************************************************************/
 672
 673 static NTSTATUS open_file(files_struct *fsp,
 674                           connection_struct *conn,
 675                           struct smb_request *req,
 676                           const char *parent_dir,
 677                           int flags,
 678                           mode_t unx_mode,
 679                           uint32 access_mask, /* client requested access mask. */
 680                           uint32 open_access_mask, /* what we're actually using in the open. */
 681                           bool *p_file_created)
 682 {
 683         struct smb_filename *smb_fname = fsp->fsp_name;
 684         NTSTATUS status = NT_STATUS_OK;
 685         int accmode = (flags & O_ACCMODE);
 686         int local_flags = flags;
 687         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 688
 689         fsp->fh->fd = -1;
 690         errno = EPERM;
 691
 692         /* Check permissions */
 693
 694         /*
 695          * This code was changed after seeing a client open request
 696          * containing the open mode of (DENY_WRITE/read-only) with
 697          * the 'create if not exist' bit set. The previous code
 698          * would fail to open the file read only on a read-only share
 699          * as it was checking the flags parameter  directly against O_RDONLY,
 700          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 701          * JRA.
 702          */
 703
 704         if (!CAN_WRITE(conn)) {
 705                 /* It's a read-only share - fail if we wanted to write. */
 706                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 707                         DEBUG(3,("Permission denied opening %s\n",
 708                                  smb_fname_str_dbg(smb_fname)));
 709                         return NT_STATUS_ACCESS_DENIED;
 710                 }
 711                 if (flags & O_CREAT) {
 712                         /* We don't want to write - but we must make sure that
 713                            O_CREAT doesn't create the file if we have write
 714                            access into the directory.
 715                         */
 716                         flags &= ~(O_CREAT|O_EXCL);
 717                         local_flags &= ~(O_CREAT|O_EXCL);
 718                 }
 719         }
 720
 721         /*
 722          * This little piece of insanity is inspired by the
 723          * fact that an NT client can open a file for O_RDONLY,
 724          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 725          * If the client *can* write to the file, then it expects to
 726          * truncate the file, even though it is opening for readonly.
 727          * Quicken uses this stupid trick in backup file creation...
 728          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 729          * for helping track this one down. It didn't bite us in 2.0.x
 730          * as we always opened files read-write in that release. JRA.
 731          */
 732
 733         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 734                 DEBUG(10,("open_file: truncate requested on read-only open "
 735                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 736                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 737         }
 738
 739         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 740             (!file_existed && (local_flags & O_CREAT)) ||
 741             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 742                 const char *wild;
 743                 int ret;
 744
 745 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 746                 /*
 747                  * We would block on opening a FIFO with no one else on the
 748                  * other end. Do what we used to do and add O_NONBLOCK to the
 749                  * open flags. JRA.
 750                  */
 751
 752                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 753                         local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
 754                         local_flags |= O_NONBLOCK;
 755                 }
 756 #endif
 757
 758                 /* Don't create files with Microsoft wildcard characters. */
 759                 if (fsp->base_fsp) {
 760                         /*
 761                          * wildcard characters are allowed in stream names
 762                          * only test the basefilename
 763                          */
 764                         wild = fsp->base_fsp->fsp_name->base_name;
 765                 } else {
 766                         wild = smb_fname->base_name;
 767                 }
 768                 if ((local_flags & O_CREAT) && !file_existed &&
 769                     ms_has_wild(wild))  {
 770                         return NT_STATUS_OBJECT_NAME_INVALID;
 771                 }
 772
 773                 /* Can we access this file ? */
 774                 if (!fsp->base_fsp) {
 775                         /* Only do this check on non-stream open. */
 776                         if (file_existed) {
 777                                 status = smbd_check_access_rights(conn,
 778                                                 smb_fname,
 779                                                 false,
 780                                                 access_mask);
 781                         } else if (local_flags & O_CREAT){
 782                                 status = check_parent_access(conn,
 783                                                 smb_fname,
 784                                                 SEC_DIR_ADD_FILE);
 785                         } else {
 786                                 /* File didn't exist and no O_CREAT. */
 787                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 788                         }
 789                         if (!NT_STATUS_IS_OK(status)) {
 790                                 DEBUG(10,("open_file: "
 791                                         "%s on file "
 792                                         "%s returned %s\n",
 793                                         file_existed ?
 794                                                 "smbd_check_access_rights" :
 795                                                 "check_parent_access",
 796                                         smb_fname_str_dbg(smb_fname),
 797                                         nt_errstr(status) ));
 798                                 return status;
 799                         }
 800                 }
 801
 802                 /* Actually do the open */
 803                 status = fd_open_atomic(conn, fsp, local_flags,
 804                                 unx_mode, p_file_created);
 805                 if (!NT_STATUS_IS_OK(status)) {
 806                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 807                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 808                                  nt_errstr(status),local_flags,flags));
 809                         return status;
 810                 }
 811
 812                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 813                 if (ret == -1) {
 814                         /* If we have an fd, this stat should succeed. */
 815                         DEBUG(0,("Error doing fstat on open file %s "
 816                                 "(%s)\n",
 817                                 smb_fname_str_dbg(smb_fname),
 818                                 strerror(errno) ));
 819                         status = map_nt_error_from_unix(errno);
 820                         fd_close(fsp);
 821                         return status;
 822                 }
 823
 824                 if (*p_file_created) {
 825                         /* We created this file. */
 826
 827                         bool need_re_stat = false;
 828                         /* Do all inheritance work after we've
 829                            done a successful fstat call and filled
 830                            in the stat struct in fsp->fsp_name. */
 831
 832                         /* Inherit the ACL if required */
 833                         if (lp_inherit_perms(SNUM(conn))) {
 834                                 inherit_access_posix_acl(conn, parent_dir,
 835                                                          smb_fname->base_name,
 836                                                          unx_mode);
 837                                 need_re_stat = true;
 838                         }
 839
 840                         /* Change the owner if required. */
 841                         if (lp_inherit_owner(SNUM(conn))) {
 842                                 change_file_owner_to_parent(conn, parent_dir,
 843                                                             fsp);
 844                                 need_re_stat = true;
 845                         }
 846
 847                         if (need_re_stat) {
 848                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 849                                 /* If we have an fd, this stat should succeed. */
 850                                 if (ret == -1) {
 851                                         DEBUG(0,("Error doing fstat on open file %s "
 852                                                  "(%s)\n",
 853                                                  smb_fname_str_dbg(smb_fname),
 854                                                  strerror(errno) ));
 855                                 }
 856                         }
 857
 858                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 859                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 860                                      smb_fname->base_name);
 861                 }
 862         } else {
 863                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 864                 if (!file_existed) {
 865                         /* File must exist for a stat open. */
 866                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 867                 }
 868
 869                 status = smbd_check_access_rights(conn,
 870                                 smb_fname,
 871                                 false,
 872                                 access_mask);
 873
 874                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 875                                 fsp->posix_open &&
 876                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 877                         /* This is a POSIX stat open for delete
 878                          * or rename on a symlink that points
 879                          * nowhere. Allow. */
 880                         DEBUG(10,("open_file: allowing POSIX "
 881                                   "open on bad symlink %s\n",
 882                                   smb_fname_str_dbg(smb_fname)));
 883                         status = NT_STATUS_OK;
 884                 }
 885
 886                 if (!NT_STATUS_IS_OK(status)) {
 887                         DEBUG(10,("open_file: "
 888                                 "smbd_check_access_rights on file "
 889                                 "%s returned %s\n",
 890                                 smb_fname_str_dbg(smb_fname),
 891                                 nt_errstr(status) ));
 892                         return status;
 893                 }
 894         }
 895
 896         /*
 897          * POSIX allows read-only opens of directories. We don't
 898          * want to do this (we use a different code path for this)
 899          * so catch a directory open and return an EISDIR. JRA.
 900          */
 901
 902         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 903                 fd_close(fsp);
 904                 errno = EISDIR;
 905                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 906         }
 907
 908         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 909         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 910         fsp->file_pid = req ? req->smbpid : 0;
 911         fsp->can_lock = True;
 912         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
 913         fsp->can_write =
 914                 CAN_WRITE(conn) &&
 915                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
 916         fsp->print_file = NULL;
 917         fsp->modified = False;
 918         fsp->sent_oplock_break = NO_BREAK_SENT;
 919         fsp->is_directory = False;
 920         if (conn->aio_write_behind_list &&
 921             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 922                        conn->case_sensitive)) {
 923                 fsp->aio_write_behind = True;
 924         }
 925
 926         fsp->wcp = NULL; /* Write cache pointer. */
 927
 928         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 929                  conn->session_info->unix_info->unix_name,
 930                  smb_fname_str_dbg(smb_fname),
 931                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 932                  conn->num_files_open));
 933
 934         errno = 0;
 935         return NT_STATUS_OK;
 936 }
 937
 938 /****************************************************************************
 939  Check if we can open a file with a share mode.
 940  Returns True if conflict, False if not.
 941 ****************************************************************************/
 942
 943 static bool share_conflict(struct share_mode_entry *entry,
 944                            uint32 access_mask,
 945                            uint32 share_access)
 946 {
 947         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 948                   "entry->share_access = 0x%x, "
 949                   "entry->private_options = 0x%x\n",
 950                   (unsigned int)entry->access_mask,
 951                   (unsigned int)entry->share_access,
 952                   (unsigned int)entry->private_options));
 953
 954         if (server_id_is_disconnected(&entry->pid)) {
 955                 /*
 956                  * note: cleanup should have been done by
 957                  * delay_for_batch_oplocks()
 958                  */
 959                 return false;
 960         }
 961
 962         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 963                   (unsigned int)access_mask, (unsigned int)share_access));
 964
 965         if ((entry->access_mask & (FILE_WRITE_DATA|
 966                                    FILE_APPEND_DATA|
 967                                    FILE_READ_DATA|
 968                                    FILE_EXECUTE|
 969                                    DELETE_ACCESS)) == 0) {
 970                 DEBUG(10,("share_conflict: No conflict due to "
 971                           "entry->access_mask = 0x%x\n",
 972                           (unsigned int)entry->access_mask ));
 973                 return False;
 974         }
 975
 976         if ((access_mask & (FILE_WRITE_DATA|
 977                             FILE_APPEND_DATA|
 978                             FILE_READ_DATA|
 979                             FILE_EXECUTE|
 980                             DELETE_ACCESS)) == 0) {
 981                 DEBUG(10,("share_conflict: No conflict due to "
 982                           "access_mask = 0x%x\n",
 983                           (unsigned int)access_mask ));
 984                 return False;
 985         }
 986
 987 #if 1 /* JRA TEST - Superdebug. */
 988 #define CHECK_MASK(num, am, right, sa, share) \
 989         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 990                 (unsigned int)(num), (unsigned int)(am), \
 991                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 992         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 993                 (unsigned int)(num), (unsigned int)(sa), \
 994                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 995         if (((am) & (right)) && !((sa) & (share))) { \
 996                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 997 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 998                         (unsigned int)(share) )); \
 999                 return True; \
1000         }
1001 #else
1002 #define CHECK_MASK(num, am, right, sa, share) \
1003         if (((am) & (right)) && !((sa) & (share))) { \
1004                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1005 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1006                         (unsigned int)(share) )); \
1007                 return True; \
1008         }
1009 #endif
1010
1011         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1012                    share_access, FILE_SHARE_WRITE);
1013         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1014                    entry->share_access, FILE_SHARE_WRITE);
1015
1016         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1017                    share_access, FILE_SHARE_READ);
1018         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1019                    entry->share_access, FILE_SHARE_READ);
1020
1021         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1022                    share_access, FILE_SHARE_DELETE);
1023         CHECK_MASK(6, access_mask, DELETE_ACCESS,
1024                    entry->share_access, FILE_SHARE_DELETE);
1025
1026         DEBUG(10,("share_conflict: No conflict.\n"));
1027         return False;
1028 }
1029
1030 #if defined(DEVELOPER)
1031 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1032                                       int num,
1033                                       struct share_mode_entry *share_entry)
1034 {
1035         struct server_id self = messaging_server_id(sconn->msg_ctx);
1036         files_struct *fsp;
1037
1038         if (!serverid_equal(&self, &share_entry->pid)) {
1039                 return;
1040         }
1041
1042         if (!is_valid_share_mode_entry(share_entry)) {
1043                 return;
1044         }
1045
1046         fsp = file_find_dif(sconn, share_entry->id,
1047                             share_entry->share_file_id);
1048         if (!fsp) {
1049                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1050                          share_mode_str(talloc_tos(), num, share_entry) ));
1051                 smb_panic("validate_my_share_entries: Cannot match a "
1052                           "share entry with an open file\n");
1053         }
1054
1055         if ((share_entry->op_type == NO_OPLOCK) &&
1056             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK))
1057         {
1058                 /* Someone has already written to it, but I haven't yet
1059                  * noticed */
1060                 return;
1061         }
1062
1063         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1064                 goto panic;
1065         }
1066
1067         return;
1068
1069  panic:
1070         {
1071                 char *str;
1072                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1073                          share_mode_str(talloc_tos(), num, share_entry) ));
1074                 str = talloc_asprintf(talloc_tos(),
1075                         "validate_my_share_entries: "
1076                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1077                          fsp->fsp_name->base_name,
1078                          (unsigned int)fsp->oplock_type,
1079                          (unsigned int)share_entry->op_type );
1080                 smb_panic(str);
1081         }
1082 }
1083 #endif
1084
1085 bool is_stat_open(uint32 access_mask)
1086 {
1087         const uint32_t stat_open_bits =
1088                 (SYNCHRONIZE_ACCESS|
1089                  FILE_READ_ATTRIBUTES|
1090                  FILE_WRITE_ATTRIBUTES);
1091
1092         return (((access_mask &  stat_open_bits) != 0) &&
1093                 ((access_mask & ~stat_open_bits) == 0));
1094 }
1095
1096 static bool has_delete_on_close(struct share_mode_lock *lck,
1097                                 uint32_t name_hash)
1098 {
1099         struct share_mode_data *d = lck->data;
1100         uint32_t i;
1101
1102         if (d->num_share_modes == 0) {
1103                 return false;
1104         }
1105         if (!is_delete_on_close_set(lck, name_hash)) {
1106                 return false;
1107         }
1108         for (i=0; i<d->num_share_modes; i++) {
1109                 if (!share_mode_stale_pid(d, i)) {
1110                         return true;
1111                 }
1112         }
1113         return false;
1114 }
1115
1116 /****************************************************************************
1117  Deal with share modes
1118  Invarient: Share mode must be locked on entry and exit.
1119  Returns -1 on error, or number of share modes on success (may be zero).
1120 ****************************************************************************/
1121
1122 static NTSTATUS open_mode_check(connection_struct *conn,
1123                                 struct share_mode_lock *lck,
1124                                 uint32 access_mask,
1125                                 uint32 share_access,
1126                                 bool *file_existed)
1127 {
1128         int i;
1129
1130         if(lck->data->num_share_modes == 0) {
1131                 return NT_STATUS_OK;
1132         }
1133
1134         if (is_stat_open(access_mask)) {
1135                 /* Stat open that doesn't trigger oplock breaks or share mode
1136                  * checks... ! JRA. */
1137                 return NT_STATUS_OK;
1138         }
1139
1140         /*
1141          * Check if the share modes will give us access.
1142          */
1143
1144 #if defined(DEVELOPER)
1145         for(i = 0; i < lck->data->num_share_modes; i++) {
1146                 validate_my_share_entries(conn->sconn, i,
1147                                           &lck->data->share_modes[i]);
1148         }
1149 #endif
1150
1151         /* Now we check the share modes, after any oplock breaks. */
1152         for(i = 0; i < lck->data->num_share_modes; i++) {
1153
1154                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1155                         continue;
1156                 }
1157
1158                 /* someone else has a share lock on it, check to see if we can
1159                  * too */
1160                 if (share_conflict(&lck->data->share_modes[i],
1161                                    access_mask, share_access)) {
1162
1163                         if (share_mode_stale_pid(lck->data, i)) {
1164                                 continue;
1165                         }
1166
1167                         *file_existed = true;
1168
1169                         return NT_STATUS_SHARING_VIOLATION;
1170                 }
1171         }
1172
1173         if (lck->data->num_share_modes != 0) {
1174                 *file_existed = true;
1175         }
1176
1177         return NT_STATUS_OK;
1178 }
1179
1180 /*
1181  * Send a break message to the oplock holder and delay the open for
1182  * our client.
1183  */
1184
1185 static NTSTATUS send_break_message(files_struct *fsp,
1186                                         struct share_mode_entry *exclusive,
1187                                         uint64_t mid,
1188                                         int oplock_request)
1189 {
1190         NTSTATUS status;
1191         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1192
1193         DEBUG(10, ("Sending break request to PID %s\n",
1194                    procid_str_static(&exclusive->pid)));
1195         exclusive->op_mid = mid;
1196
1197         /* Create the message. */
1198         share_mode_entry_to_message(msg, exclusive);
1199
1200         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1201                                     MSG_SMB_BREAK_REQUEST,
1202                                     (uint8 *)msg, sizeof(msg));
1203         if (!NT_STATUS_IS_OK(status)) {
1204                 DEBUG(3, ("Could not send oplock break message: %s\n",
1205                           nt_errstr(status)));
1206         }
1207
1208         return status;
1209 }
1210
1211 /*
1212  * Return share_mode_entry pointers for :
1213  * 1). Batch oplock entry.
1214  * 2). Batch or exclusive oplock entry (may be identical to #1).
1215  * bool have_level2_oplock
1216  * bool have_no_oplock.
1217  * Do internal consistency checks on the share mode for a file.
1218  */
1219
1220 static void find_oplock_types(files_struct *fsp,
1221                                 int oplock_request,
1222                                 const struct share_mode_lock *lck,
1223                                 struct share_mode_entry **pp_batch,
1224                                 struct share_mode_entry **pp_ex_or_batch,
1225                                 bool *got_level2,
1226                                 bool *got_no_oplock)
1227 {
1228         int i;
1229
1230         *pp_batch = NULL;
1231         *pp_ex_or_batch = NULL;
1232         *got_level2 = false;
1233         *got_no_oplock = false;
1234
1235         /* Ignore stat or internal opens, as is done in
1236                 delay_for_batch_oplocks() and
1237                 delay_for_exclusive_oplocks().
1238          */
1239         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1240                 return;
1241         }
1242
1243         for (i=0; i<lck->data->num_share_modes; i++) {
1244                 struct share_mode_entry *e = &lck->data->share_modes[i];
1245
1246                 if (!is_valid_share_mode_entry(e)) {
1247                         continue;
1248                 }
1249
1250                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1251                         /* We ignore stat opens in the table - they
1252                            always have NO_OPLOCK and never get or
1253                            cause breaks. JRA. */
1254                         continue;
1255                 }
1256
1257                 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1258                         /* batch - can only be one. */
1259                         if (share_mode_stale_pid(lck->data, i)) {
1260                                 DEBUG(10, ("Found stale batch oplock\n"));
1261                                 continue;
1262                         }
1263                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1264                                 smb_panic("Bad batch oplock entry.");
1265                         }
1266                         *pp_batch = e;
1267                 }
1268
1269                 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1270                         if (share_mode_stale_pid(lck->data, i)) {
1271                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1272                                 continue;
1273                         }
1274                         /* Exclusive or batch - can only be one. */
1275                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1276                                 smb_panic("Bad exclusive or batch oplock entry.");
1277                         }
1278                         *pp_ex_or_batch = e;
1279                 }
1280
1281                 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1282                         if (*pp_batch || *pp_ex_or_batch) {
1283                                 if (share_mode_stale_pid(lck->data, i)) {
1284                                         DEBUG(10, ("Found stale LevelII "
1285                                                    "oplock\n"));
1286                                         continue;
1287                                 }
1288                                 smb_panic("Bad levelII oplock entry.");
1289                         }
1290                         *got_level2 = true;
1291                 }
1292
1293                 if (e->op_type == NO_OPLOCK) {
1294                         if (*pp_batch || *pp_ex_or_batch) {
1295                                 if (share_mode_stale_pid(lck->data, i)) {
1296                                         DEBUG(10, ("Found stale NO_OPLOCK "
1297                                                    "entry\n"));
1298                                         continue;
1299                                 }
1300                                 smb_panic("Bad no oplock entry.");
1301                         }
1302                         *got_no_oplock = true;
1303                 }
1304         }
1305 }
1306
1307 static bool delay_for_batch_oplocks(files_struct *fsp,
1308                                         uint64_t mid,
1309                                         int oplock_request,
1310                                         struct share_mode_entry *batch_entry)
1311 {
1312         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1313                 return false;
1314         }
1315         if (batch_entry == NULL) {
1316                 return false;
1317         }
1318
1319         if (server_id_is_disconnected(&batch_entry->pid)) {
1320                 /*
1321                  * TODO: clean up.
1322                  * This could be achieved by sending a break message
1323                  * to ourselves. Special considerations for files
1324                  * with delete_on_close flag set!
1325                  *
1326                  * For now we keep it simple and do not
1327                  * allow delete on close for durable handles.
1328                  */
1329                 return false;
1330         }
1331
1332         /* Found a batch oplock */
1333         send_break_message(fsp, batch_entry, mid, oplock_request);
1334         return true;
1335 }
1336
1337 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1338                                         uint64_t mid,
1339                                         int oplock_request,
1340                                         struct share_mode_entry *ex_entry)
1341 {
1342         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1343                 return false;
1344         }
1345         if (ex_entry == NULL) {
1346                 return false;
1347         }
1348
1349         if (server_id_is_disconnected(&ex_entry->pid)) {
1350                 /*
1351                  * since only durable handles can get disconnected,
1352                  * and we can only get durable handles with batch oplocks,
1353                  * this should actually never be reached...
1354                  */
1355                 return false;
1356         }
1357
1358         send_break_message(fsp, ex_entry, mid, oplock_request);
1359         return true;
1360 }
1361
1362 static bool file_has_brlocks(files_struct *fsp)
1363 {
1364         struct byte_range_lock *br_lck;
1365
1366         br_lck = brl_get_locks_readonly(fsp);
1367         if (!br_lck)
1368                 return false;
1369
1370         return (brl_num_locks(br_lck) > 0);
1371 }
1372
1373 static void grant_fsp_oplock_type(files_struct *fsp,
1374                                 int oplock_request,
1375                                 bool got_level2_oplock,
1376                                 bool got_a_none_oplock)
1377 {
1378         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1379                             lp_level2_oplocks(SNUM(fsp->conn));
1380
1381         /* Start by granting what the client asked for,
1382            but ensure no SAMBA_PRIVATE bits can be set. */
1383         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1384
1385         if (oplock_request & INTERNAL_OPEN_ONLY) {
1386                 /* No oplocks on internal open. */
1387                 fsp->oplock_type = NO_OPLOCK;
1388                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1389                         fsp->oplock_type, fsp_str_dbg(fsp)));
1390                 return;
1391         }
1392
1393         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1394                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1395                         fsp_str_dbg(fsp)));
1396                 fsp->oplock_type = NO_OPLOCK;
1397         }
1398
1399         if (is_stat_open(fsp->access_mask)) {
1400                 /* Leave the value already set. */
1401                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1402                         fsp->oplock_type, fsp_str_dbg(fsp)));
1403                 return;
1404         }
1405
1406         /*
1407          * Match what was requested (fsp->oplock_type) with
1408          * what was found in the existing share modes.
1409          */
1410
1411         if (got_a_none_oplock) {
1412                 fsp->oplock_type = NO_OPLOCK;
1413         } else if (got_level2_oplock) {
1414                 if (fsp->oplock_type == NO_OPLOCK ||
1415                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1416                         /* Store a level2 oplock, but don't tell the client */
1417                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1418                 } else {
1419                         fsp->oplock_type = LEVEL_II_OPLOCK;
1420                 }
1421         } else {
1422                 /* All share_mode_entries are placeholders or deferred.
1423                  * Silently upgrade to fake levelII if the client didn't
1424                  * ask for an oplock. */
1425                 if (fsp->oplock_type == NO_OPLOCK) {
1426                         /* Store a level2 oplock, but don't tell the client */
1427                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1428                 }
1429         }
1430
1431         /*
1432          * Don't grant level2 to clients that don't want them
1433          * or if we've turned them off.
1434          */
1435         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1436                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1437         }
1438
1439         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1440                   fsp->oplock_type, fsp_str_dbg(fsp)));
1441 }
1442
1443 static bool request_timed_out(struct timeval request_time,
1444                               struct timeval timeout)
1445 {
1446         struct timeval now, end_time;
1447         GetTimeOfDay(&now);
1448         end_time = timeval_sum(&request_time, &timeout);
1449         return (timeval_compare(&end_time, &now) < 0);
1450 }
1451
1452 struct defer_open_state {
1453         struct smbd_server_connection *sconn;
1454         uint64_t mid;
1455 };
1456
1457 static void defer_open_done(struct tevent_req *req);
1458
1459 /****************************************************************************
1460  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1461 ****************************************************************************/
1462
1463 static void defer_open(struct share_mode_lock *lck,
1464                        struct timeval request_time,
1465                        struct timeval timeout,
1466                        struct smb_request *req,
1467                        struct deferred_open_record *state)
1468 {
1469         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1470                   "open entry for mid %llu\n",
1471                   (unsigned int)request_time.tv_sec,
1472                   (unsigned int)request_time.tv_usec,
1473                   (unsigned long long)req->mid));
1474
1475         if (!push_deferred_open_message_smb(req, request_time, timeout,
1476                                        state->id, (char *)state, sizeof(*state))) {
1477                 TALLOC_FREE(lck);
1478                 exit_server("push_deferred_open_message_smb failed");
1479         }
1480         if (lck) {
1481                 struct defer_open_state *watch_state;
1482                 struct tevent_req *watch_req;
1483                 bool ret;
1484
1485                 watch_state = talloc(req->sconn, struct defer_open_state);
1486                 if (watch_state == NULL) {
1487                         exit_server("talloc failed");
1488                 }
1489                 watch_state->sconn = req->sconn;
1490                 watch_state->mid = req->mid;
1491
1492                 DEBUG(10, ("defering mid %llu\n",
1493                            (unsigned long long)req->mid));
1494
1495                 watch_req = dbwrap_record_watch_send(
1496                         watch_state, req->sconn->ev_ctx, lck->data->record,
1497                         req->sconn->msg_ctx);
1498                 if (watch_req == NULL) {
1499                         exit_server("Could not watch share mode record");
1500                 }
1501                 tevent_req_set_callback(watch_req, defer_open_done,
1502                                         watch_state);
1503
1504                 ret = tevent_req_set_endtime(
1505                         watch_req, req->sconn->ev_ctx,
1506                         timeval_sum(&request_time, &timeout));
1507                 SMB_ASSERT(ret);
1508         }
1509 }
1510
1511 static void defer_open_done(struct tevent_req *req)
1512 {
1513         struct defer_open_state *state = tevent_req_callback_data(
1514                 req, struct defer_open_state);
1515         NTSTATUS status;
1516         bool ret;
1517
1518         status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1519         TALLOC_FREE(req);
1520         if (!NT_STATUS_IS_OK(status)) {
1521                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1522                           nt_errstr(status)));
1523                 /*
1524                  * Even if it failed, retry anyway. TODO: We need a way to
1525                  * tell a re-scheduled open about that error.
1526                  */
1527         }
1528
1529         DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1530
1531         ret = schedule_deferred_open_message_smb(state->sconn, state->mid);
1532         SMB_ASSERT(ret);
1533         TALLOC_FREE(state);
1534 }
1535
1536
1537 /****************************************************************************
1538  On overwrite open ensure that the attributes match.
1539 ****************************************************************************/
1540
1541 static bool open_match_attributes(connection_struct *conn,
1542                                   uint32 old_dos_attr,
1543                                   uint32 new_dos_attr,
1544                                   mode_t existing_unx_mode,
1545                                   mode_t new_unx_mode,
1546                                   mode_t *returned_unx_mode)
1547 {
1548         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1549
1550         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1551         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1552
1553         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1554            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1555                 *returned_unx_mode = new_unx_mode;
1556         } else {
1557                 *returned_unx_mode = (mode_t)0;
1558         }
1559
1560         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1561                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1562                   "returned_unx_mode = 0%o\n",
1563                   (unsigned int)old_dos_attr,
1564                   (unsigned int)existing_unx_mode,
1565                   (unsigned int)new_dos_attr,
1566                   (unsigned int)*returned_unx_mode ));
1567
1568         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1569         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1570                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1571                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1572                         return False;
1573                 }
1574         }
1575         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1576                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1577                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1578                         return False;
1579                 }
1580         }
1581         return True;
1582 }
1583
1584 /****************************************************************************
1585  Special FCB or DOS processing in the case of a sharing violation.
1586  Try and find a duplicated file handle.
1587 ****************************************************************************/
1588
1589 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1590                                 connection_struct *conn,
1591                                 files_struct *fsp_to_dup_into,
1592                                 const struct smb_filename *smb_fname,
1593                                 struct file_id id,
1594                                 uint16 file_pid,
1595                                 uint64_t vuid,
1596                                 uint32 access_mask,
1597                                 uint32 share_access,
1598                                 uint32 create_options)
1599 {
1600         files_struct *fsp;
1601
1602         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1603                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1604
1605         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1606             fsp = file_find_di_next(fsp)) {
1607
1608                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1609                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1610                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1611                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1612                           (unsigned int)fsp->file_pid,
1613                           (unsigned int)fsp->fh->private_options,
1614                           (unsigned int)fsp->access_mask ));
1615
1616                 if (fsp != fsp_to_dup_into &&
1617                     fsp->fh->fd != -1 &&
1618                     fsp->vuid == vuid &&
1619                     fsp->file_pid == file_pid &&
1620                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1621                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1622                     (fsp->access_mask & FILE_WRITE_DATA) &&
1623                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1624                     strequal(fsp->fsp_name->stream_name,
1625                              smb_fname->stream_name)) {
1626                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1627                         break;
1628                 }
1629         }
1630
1631         if (!fsp) {
1632                 return NT_STATUS_NOT_FOUND;
1633         }
1634
1635         /* quite an insane set of semantics ... */
1636         if (is_executable(smb_fname->base_name) &&
1637             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1638                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1639                 return NT_STATUS_INVALID_PARAMETER;
1640         }
1641
1642         /* We need to duplicate this fsp. */
1643         return dup_file_fsp(req, fsp, access_mask, share_access,
1644                             create_options, fsp_to_dup_into);
1645 }
1646
1647 static void schedule_defer_open(struct share_mode_lock *lck,
1648                                 struct timeval request_time,
1649                                 struct smb_request *req)
1650 {
1651         struct deferred_open_record state;
1652
1653         /* This is a relative time, added to the absolute
1654            request_time value to get the absolute timeout time.
1655            Note that if this is the second or greater time we enter
1656            this codepath for this particular request mid then
1657            request_time is left as the absolute time of the *first*
1658            time this request mid was processed. This is what allows
1659            the request to eventually time out. */
1660
1661         struct timeval timeout;
1662
1663         /* Normally the smbd we asked should respond within
1664          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1665          * the client did, give twice the timeout as a safety
1666          * measure here in case the other smbd is stuck
1667          * somewhere else. */
1668
1669         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1670
1671         /* Nothing actually uses state.delayed_for_oplocks
1672            but it's handy to differentiate in debug messages
1673            between a 30 second delay due to oplock break, and
1674            a 1 second delay for share mode conflicts. */
1675
1676         state.delayed_for_oplocks = True;
1677         state.async_open = false;
1678         state.id = lck->data->id;
1679
1680         if (!request_timed_out(request_time, timeout)) {
1681                 defer_open(lck, request_time, timeout, req, &state);
1682         }
1683 }
1684
1685 /****************************************************************************
1686  Reschedule an open call that went asynchronous.
1687 ****************************************************************************/
1688
1689 static void schedule_async_open(struct timeval request_time,
1690                                 struct smb_request *req)
1691 {
1692         struct deferred_open_record state;
1693         struct timeval timeout;
1694
1695         timeout = timeval_set(20, 0);
1696
1697         ZERO_STRUCT(state);
1698         state.delayed_for_oplocks = false;
1699         state.async_open = true;
1700
1701         if (!request_timed_out(request_time, timeout)) {
1702                 defer_open(NULL, request_time, timeout, req, &state);
1703         }
1704 }
1705
1706 /****************************************************************************
1707  Work out what access_mask to use from what the client sent us.
1708 ****************************************************************************/
1709
1710 static NTSTATUS smbd_calculate_maximum_allowed_access(
1711         connection_struct *conn,
1712         const struct smb_filename *smb_fname,
1713         bool use_privs,
1714         uint32_t *p_access_mask)
1715 {
1716         struct security_descriptor *sd;
1717         uint32_t access_granted;
1718         NTSTATUS status;
1719
1720         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1721                 *p_access_mask |= FILE_GENERIC_ALL;
1722                 return NT_STATUS_OK;
1723         }
1724
1725         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1726                                     (SECINFO_OWNER |
1727                                      SECINFO_GROUP |
1728                                      SECINFO_DACL),
1729                                     talloc_tos(), &sd);
1730
1731         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1732                 /*
1733                  * File did not exist
1734                  */
1735                 *p_access_mask = FILE_GENERIC_ALL;
1736                 return NT_STATUS_OK;
1737         }
1738         if (!NT_STATUS_IS_OK(status)) {
1739                 DEBUG(10,("Could not get acl on file %s: %s\n",
1740                           smb_fname_str_dbg(smb_fname),
1741                           nt_errstr(status)));
1742                 return NT_STATUS_ACCESS_DENIED;
1743         }
1744
1745         /*
1746          * If we can access the path to this file, by
1747          * default we have FILE_READ_ATTRIBUTES from the
1748          * containing directory. See the section:
1749          * "Algorithm to Check Access to an Existing File"
1750          * in MS-FSA.pdf.
1751          *
1752          * se_file_access_check()
1753          * also takes care of owner WRITE_DAC and READ_CONTROL.
1754          */
1755         status = se_file_access_check(sd,
1756                                  get_current_nttok(conn),
1757                                  use_privs,
1758                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1759                                  &access_granted);
1760
1761         TALLOC_FREE(sd);
1762
1763         if (!NT_STATUS_IS_OK(status)) {
1764                 DEBUG(10, ("Access denied on file %s: "
1765                            "when calculating maximum access\n",
1766                            smb_fname_str_dbg(smb_fname)));
1767                 return NT_STATUS_ACCESS_DENIED;
1768         }
1769         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1770
1771         if (!(access_granted & DELETE_ACCESS)) {
1772                 if (can_delete_file_in_directory(conn, smb_fname)) {
1773                         *p_access_mask |= DELETE_ACCESS;
1774                 }
1775         }
1776
1777         return NT_STATUS_OK;
1778 }
1779
1780 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1781                                     const struct smb_filename *smb_fname,
1782                                     bool use_privs,
1783                                     uint32_t access_mask,
1784                                     uint32_t *access_mask_out)
1785 {
1786         NTSTATUS status;
1787         uint32_t orig_access_mask = access_mask;
1788         uint32_t rejected_share_access;
1789
1790         /*
1791          * Convert GENERIC bits to specific bits.
1792          */
1793
1794         se_map_generic(&access_mask, &file_generic_mapping);
1795
1796         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1797         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1798
1799                 status = smbd_calculate_maximum_allowed_access(
1800                         conn, smb_fname, use_privs, &access_mask);
1801
1802                 if (!NT_STATUS_IS_OK(status)) {
1803                         return status;
1804                 }
1805
1806                 access_mask &= conn->share_access;
1807         }
1808
1809         rejected_share_access = access_mask & ~(conn->share_access);
1810
1811         if (rejected_share_access) {
1812                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1813                         "file %s: rejected by share access mask[0x%08X] "
1814                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1815                         smb_fname_str_dbg(smb_fname),
1816                         conn->share_access,
1817                         orig_access_mask, access_mask,
1818                         rejected_share_access));
1819                 return NT_STATUS_ACCESS_DENIED;
1820         }
1821
1822         *access_mask_out = access_mask;
1823         return NT_STATUS_OK;
1824 }
1825
1826 /****************************************************************************
1827  Remove the deferred open entry under lock.
1828 ****************************************************************************/
1829
1830 /****************************************************************************
1831  Return true if this is a state pointer to an asynchronous create.
1832 ****************************************************************************/
1833
1834 bool is_deferred_open_async(const void *ptr)
1835 {
1836         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1837
1838         return state->async_open;
1839 }
1840
1841 static bool clear_ads(uint32_t create_disposition)
1842 {
1843         bool ret = false;
1844
1845         switch (create_disposition) {
1846         case FILE_SUPERSEDE:
1847         case FILE_OVERWRITE_IF:
1848         case FILE_OVERWRITE:
1849                 ret = true;
1850                 break;
1851         default:
1852                 break;
1853         }
1854         return ret;
1855 }
1856
1857 static int disposition_to_open_flags(uint32_t create_disposition)
1858 {
1859         int ret = 0;
1860
1861         /*
1862          * Currently we're using FILE_SUPERSEDE as the same as
1863          * FILE_OVERWRITE_IF but they really are
1864          * different. FILE_SUPERSEDE deletes an existing file
1865          * (requiring delete access) then recreates it.
1866          */
1867
1868         switch (create_disposition) {
1869         case FILE_SUPERSEDE:
1870         case FILE_OVERWRITE_IF:
1871                 /*
1872                  * If file exists replace/overwrite. If file doesn't
1873                  * exist create.
1874                  */
1875                 ret = O_CREAT|O_TRUNC;
1876                 break;
1877
1878         case FILE_OPEN:
1879                 /*
1880                  * If file exists open. If file doesn't exist error.
1881                  */
1882                 ret = 0;
1883                 break;
1884
1885         case FILE_OVERWRITE:
1886                 /*
1887                  * If file exists overwrite. If file doesn't exist
1888                  * error.
1889                  */
1890                 ret = O_TRUNC;
1891                 break;
1892
1893         case FILE_CREATE:
1894                 /*
1895                  * If file exists error. If file doesn't exist create.
1896                  */
1897                 ret = O_CREAT|O_EXCL;
1898                 break;
1899
1900         case FILE_OPEN_IF:
1901                 /*
1902                  * If file exists open. If file doesn't exist create.
1903                  */
1904                 ret = O_CREAT;
1905                 break;
1906         }
1907         return ret;
1908 }
1909
1910 static int calculate_open_access_flags(uint32_t access_mask,
1911                                        int oplock_request,
1912                                        uint32_t private_flags)
1913 {
1914         bool need_write, need_read;
1915
1916         /*
1917          * Note that we ignore the append flag as append does not
1918          * mean the same thing under DOS and Unix.
1919          */
1920
1921         need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
1922         if (!need_write) {
1923                 return O_RDONLY;
1924         }
1925
1926         /* DENY_DOS opens are always underlying read-write on the
1927            file handle, no matter what the requested access mask
1928            says. */
1929
1930         need_read =
1931                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1932                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1933                                 FILE_READ_EA|FILE_EXECUTE));
1934
1935         if (!need_read) {
1936                 return O_WRONLY;
1937         }
1938         return O_RDWR;
1939 }
1940
1941 /****************************************************************************
1942  Open a file with a share mode. Passed in an already created files_struct *.
1943 ****************************************************************************/
1944
1945 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1946                             struct smb_request *req,
1947                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1948                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1949                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1950                             uint32 create_options,      /* options such as delete on close. */
1951                             uint32 new_dos_attributes,  /* attributes used for new file. */
1952                             int oplock_request,         /* internal Samba oplock codes. */
1953                                                         /* Information (FILE_EXISTS etc.) */
1954                             uint32_t private_flags,     /* Samba specific flags. */
1955                             int *pinfo,
1956                             files_struct *fsp)
1957 {
1958         struct smb_filename *smb_fname = fsp->fsp_name;
1959         int flags=0;
1960         int flags2=0;
1961         bool file_existed = VALID_STAT(smb_fname->st);
1962         bool def_acl = False;
1963         bool posix_open = False;
1964         bool new_file_created = False;
1965         bool first_open_attempt = true;
1966         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1967         mode_t new_unx_mode = (mode_t)0;
1968         mode_t unx_mode = (mode_t)0;
1969         int info;
1970         uint32 existing_dos_attributes = 0;
1971         struct timeval request_time = timeval_zero();
1972         struct share_mode_lock *lck = NULL;
1973         uint32 open_access_mask = access_mask;
1974         NTSTATUS status;
1975         char *parent_dir;
1976         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1977         struct share_mode_entry *batch_entry = NULL;
1978         struct share_mode_entry *exclusive_entry = NULL;
1979         bool got_level2_oplock = false;
1980         bool got_a_none_oplock = false;
1981         struct timespec old_write_time;
1982         struct file_id id;
1983
1984         if (conn->printer) {
1985                 /*
1986                  * Printers are handled completely differently.
1987                  * Most of the passed parameters are ignored.
1988                  */
1989
1990                 if (pinfo) {
1991                         *pinfo = FILE_WAS_CREATED;
1992                 }
1993
1994                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1995                            smb_fname_str_dbg(smb_fname)));
1996
1997                 if (!req) {
1998                         DEBUG(0,("open_file_ntcreate: printer open without "
1999                                 "an SMB request!\n"));
2000                         return NT_STATUS_INTERNAL_ERROR;
2001                 }
2002
2003                 return print_spool_open(fsp, smb_fname->base_name,
2004                                         req->vuid);
2005         }
2006
2007         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2008                             NULL)) {
2009                 return NT_STATUS_NO_MEMORY;
2010         }
2011
2012         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2013                 posix_open = True;
2014                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2015                 new_dos_attributes = 0;
2016         } else {
2017                 /* Windows allows a new file to be created and
2018                    silently removes a FILE_ATTRIBUTE_DIRECTORY
2019                    sent by the client. Do the same. */
2020
2021                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2022
2023                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2024                  * created new. */
2025                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2026                                      smb_fname, parent_dir);
2027         }
2028
2029         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2030                    "access_mask=0x%x share_access=0x%x "
2031                    "create_disposition = 0x%x create_options=0x%x "
2032                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2033                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2034                    access_mask, share_access, create_disposition,
2035                    create_options, (unsigned int)unx_mode, oplock_request,
2036                    (unsigned int)private_flags));
2037
2038         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2039                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2040                 return NT_STATUS_INTERNAL_ERROR;
2041         }
2042
2043         /*
2044          * Only non-internal opens can be deferred at all
2045          */
2046
2047         if (req) {
2048                 void *ptr;
2049                 if (get_deferred_open_message_state(req,
2050                                 &request_time,
2051                                 &ptr)) {
2052                         /* Remember the absolute time of the original
2053                            request with this mid. We'll use it later to
2054                            see if this has timed out. */
2055
2056                         /* If it was an async create retry, the file
2057                            didn't exist. */
2058
2059                         if (is_deferred_open_async(ptr)) {
2060                                 SET_STAT_INVALID(smb_fname->st);
2061                                 file_existed = false;
2062                         }
2063
2064                         /* Ensure we don't reprocess this message. */
2065                         remove_deferred_open_message_smb(req->sconn, req->mid);
2066
2067                         first_open_attempt = false;
2068                 }
2069         }
2070
2071         if (!posix_open) {
2072                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2073                 if (file_existed) {
2074                         existing_dos_attributes = dos_mode(conn, smb_fname);
2075                 }
2076         }
2077
2078         /* ignore any oplock requests if oplocks are disabled */
2079         if (!lp_oplocks(SNUM(conn)) ||
2080             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2081                 /* Mask off everything except the private Samba bits. */
2082                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2083         }
2084
2085         /* this is for OS/2 long file names - say we don't support them */
2086         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2087                 /* OS/2 Workplace shell fix may be main code stream in a later
2088                  * release. */
2089                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2090                          "supported.\n"));
2091                 if (use_nt_status()) {
2092                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2093                 }
2094                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2095         }
2096
2097         switch( create_disposition ) {
2098                 case FILE_OPEN:
2099                         /* If file exists open. If file doesn't exist error. */
2100                         if (!file_existed) {
2101                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2102                                          "requested for file %s and file "
2103                                          "doesn't exist.\n",
2104                                          smb_fname_str_dbg(smb_fname)));
2105                                 errno = ENOENT;
2106                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2107                         }
2108                         break;
2109
2110                 case FILE_OVERWRITE:
2111                         /* If file exists overwrite. If file doesn't exist
2112                          * error. */
2113                         if (!file_existed) {
2114                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2115                                          "requested for file %s and file "
2116                                          "doesn't exist.\n",
2117                                          smb_fname_str_dbg(smb_fname) ));
2118                                 errno = ENOENT;
2119                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2120                         }
2121                         break;
2122
2123                 case FILE_CREATE:
2124                         /* If file exists error. If file doesn't exist
2125                          * create. */
2126                         if (file_existed) {
2127                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2128                                          "requested for file %s and file "
2129                                          "already exists.\n",
2130                                          smb_fname_str_dbg(smb_fname)));
2131                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2132                                         errno = EISDIR;
2133                                 } else {
2134                                         errno = EEXIST;
2135                                 }
2136                                 return map_nt_error_from_unix(errno);
2137                         }
2138                         break;
2139
2140                 case FILE_SUPERSEDE:
2141                 case FILE_OVERWRITE_IF:
2142                 case FILE_OPEN_IF:
2143                         break;
2144                 default:
2145                         return NT_STATUS_INVALID_PARAMETER;
2146         }
2147
2148         flags2 = disposition_to_open_flags(create_disposition);
2149
2150         /* We only care about matching attributes on file exists and
2151          * overwrite. */
2152
2153         if (!posix_open && file_existed &&
2154             ((create_disposition == FILE_OVERWRITE) ||
2155              (create_disposition == FILE_OVERWRITE_IF))) {
2156                 if (!open_match_attributes(conn, existing_dos_attributes,
2157                                            new_dos_attributes,
2158                                            smb_fname->st.st_ex_mode,
2159                                            unx_mode, &new_unx_mode)) {
2160                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2161                                  "for file %s (%x %x) (0%o, 0%o)\n",
2162                                  smb_fname_str_dbg(smb_fname),
2163                                  existing_dos_attributes,
2164                                  new_dos_attributes,
2165                                  (unsigned int)smb_fname->st.st_ex_mode,
2166                                  (unsigned int)unx_mode ));
2167                         errno = EACCES;
2168                         return NT_STATUS_ACCESS_DENIED;
2169                 }
2170         }
2171
2172         status = smbd_calculate_access_mask(conn, smb_fname,
2173                                         false,
2174                                         access_mask,
2175                                         &access_mask);
2176         if (!NT_STATUS_IS_OK(status)) {
2177                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2178                         "on file %s returned %s\n",
2179                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2180                 return status;
2181         }
2182
2183         open_access_mask = access_mask;
2184
2185         if (flags2 & O_TRUNC) {
2186                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2187         }
2188
2189         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2190                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2191                     access_mask));
2192
2193         /*
2194          * Note that we ignore the append flag as append does not
2195          * mean the same thing under DOS and Unix.
2196          */
2197
2198         flags = calculate_open_access_flags(access_mask, oplock_request,
2199                                             private_flags);
2200
2201         /*
2202          * Currently we only look at FILE_WRITE_THROUGH for create options.
2203          */
2204
2205 #if defined(O_SYNC)
2206         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2207                 flags2 |= O_SYNC;
2208         }
2209 #endif /* O_SYNC */
2210
2211         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2212                 flags2 |= O_APPEND;
2213         }
2214
2215         if (!posix_open && !CAN_WRITE(conn)) {
2216                 /*
2217                  * We should really return a permission denied error if either
2218                  * O_CREAT or O_TRUNC are set, but for compatibility with
2219                  * older versions of Samba we just AND them out.
2220                  */
2221                 flags2 &= ~(O_CREAT|O_TRUNC);
2222         }
2223
2224         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2225                 /*
2226                  * With kernel oplocks the open breaking an oplock
2227                  * blocks until the oplock holder has given up the
2228                  * oplock or closed the file. We prevent this by first
2229                  * trying to open the file with O_NONBLOCK (see "man
2230                  * fcntl" on Linux). For the second try, triggered by
2231                  * an oplock break response, we do not need this
2232                  * anymore.
2233                  *
2234                  * This is true under the assumption that only Samba
2235                  * requests kernel oplocks. Once someone else like
2236                  * NFSv4 starts to use that API, we will have to
2237                  * modify this by communicating with the NFSv4 server.
2238                  */
2239                 flags2 |= O_NONBLOCK;
2240         }
2241
2242         /*
2243          * Ensure we can't write on a read-only share or file.
2244          */
2245
2246         if (flags != O_RDONLY && file_existed &&
2247             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2248                 DEBUG(5,("open_file_ntcreate: write access requested for "
2249                          "file %s on read only %s\n",
2250                          smb_fname_str_dbg(smb_fname),
2251                          !CAN_WRITE(conn) ? "share" : "file" ));
2252                 errno = EACCES;
2253                 return NT_STATUS_ACCESS_DENIED;
2254         }
2255
2256         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2257         fsp->share_access = share_access;
2258         fsp->fh->private_options = private_flags;
2259         fsp->access_mask = open_access_mask; /* We change this to the
2260                                               * requested access_mask after
2261                                               * the open is done. */
2262         fsp->posix_open = posix_open;
2263
2264         /* Ensure no SAMBA_PRIVATE bits can be set. */
2265         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2266
2267         if (timeval_is_zero(&request_time)) {
2268                 request_time = fsp->open_time;
2269         }
2270
2271         /*
2272          * Ensure we pay attention to default ACLs on directories if required.
2273          */
2274
2275         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2276             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2277                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2278         }
2279
2280         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2281                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2282                  (unsigned int)flags, (unsigned int)flags2,
2283                  (unsigned int)unx_mode, (unsigned int)access_mask,
2284                  (unsigned int)open_access_mask));
2285
2286         fsp_open = open_file(fsp, conn, req, parent_dir,
2287                              flags|flags2, unx_mode, access_mask,
2288                              open_access_mask, &new_file_created);
2289
2290         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2291                 struct deferred_open_record state;
2292
2293                 /*
2294                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2295                  */
2296                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2297                         DEBUG(10, ("FIFO busy\n"));
2298                         return NT_STATUS_NETWORK_BUSY;
2299                 }
2300                 if (req == NULL) {
2301                         DEBUG(10, ("Internal open busy\n"));
2302                         return NT_STATUS_NETWORK_BUSY;
2303                 }
2304
2305                 /*
2306                  * From here on we assume this is an oplock break triggered
2307                  */
2308
2309                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2310                 if (lck == NULL) {
2311                         state.delayed_for_oplocks = false;
2312                         state.async_open = false;
2313                         state.id = fsp->file_id;
2314                         defer_open(NULL, request_time, timeval_set(0, 0),
2315                                    req, &state);
2316                         DEBUG(10, ("No share mode lock found after "
2317                                    "EWOULDBLOCK, retrying sync\n"));
2318                         return NT_STATUS_SHARING_VIOLATION;
2319                 }
2320
2321                 find_oplock_types(fsp, 0, lck, &batch_entry, &exclusive_entry,
2322                                   &got_level2_oplock, &got_a_none_oplock);
2323
2324                 if (delay_for_batch_oplocks(fsp, req->mid, 0, batch_entry) ||
2325                     delay_for_exclusive_oplocks(fsp, req->mid, 0,
2326                                                 exclusive_entry)) {
2327                         schedule_defer_open(lck, request_time, req);
2328                         TALLOC_FREE(lck);
2329                         DEBUG(10, ("Sent oplock break request to kernel "
2330                                    "oplock holder\n"));
2331                         return NT_STATUS_SHARING_VIOLATION;
2332                 }
2333
2334                 /*
2335                  * No oplock from Samba around. Immediately retry with
2336                  * a blocking open.
2337                  */
2338                 state.delayed_for_oplocks = false;
2339                 state.async_open = false;
2340                 state.id = lck->data->id;
2341                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2342                 TALLOC_FREE(lck);
2343                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2344                            "Retrying sync\n"));
2345                 return NT_STATUS_SHARING_VIOLATION;
2346         }
2347
2348         if (!NT_STATUS_IS_OK(fsp_open)) {
2349                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2350                         schedule_async_open(request_time, req);
2351                 }
2352                 return fsp_open;
2353         }
2354
2355         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2356                 /*
2357                  * The file did exist, but some other (local or NFS)
2358                  * process either renamed/unlinked and re-created the
2359                  * file with different dev/ino after we walked the path,
2360                  * but before we did the open. We could retry the
2361                  * open but it's a rare enough case it's easier to
2362                  * just fail the open to prevent creating any problems
2363                  * in the open file db having the wrong dev/ino key.
2364                  */
2365                 fd_close(fsp);
2366                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2367                         "Old (dev=0x%llu, ino =0x%llu). "
2368                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2369                         " with NT_STATUS_ACCESS_DENIED.\n",
2370                          smb_fname_str_dbg(smb_fname),
2371                          (unsigned long long)saved_stat.st_ex_dev,
2372                          (unsigned long long)saved_stat.st_ex_ino,
2373                          (unsigned long long)smb_fname->st.st_ex_dev,
2374                          (unsigned long long)smb_fname->st.st_ex_ino));
2375                 return NT_STATUS_ACCESS_DENIED;
2376         }
2377
2378         old_write_time = smb_fname->st.st_ex_mtime;
2379
2380         /*
2381          * Deal with the race condition where two smbd's detect the
2382          * file doesn't exist and do the create at the same time. One
2383          * of them will win and set a share mode, the other (ie. this
2384          * one) should check if the requested share mode for this
2385          * create is allowed.
2386          */
2387
2388         /*
2389          * Now the file exists and fsp is successfully opened,
2390          * fsp->dev and fsp->inode are valid and should replace the
2391          * dev=0,inode=0 from a non existent file. Spotted by
2392          * Nadav Danieli <nadavd@exanet.com>. JRA.
2393          */
2394
2395         id = fsp->file_id;
2396
2397         lck = get_share_mode_lock(talloc_tos(), id,
2398                                   conn->connectpath,
2399                                   smb_fname, &old_write_time);
2400
2401         if (lck == NULL) {
2402                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2403                           "mode lock for %s\n",
2404                           smb_fname_str_dbg(smb_fname)));
2405                 fd_close(fsp);
2406                 return NT_STATUS_SHARING_VIOLATION;
2407         }
2408
2409         /* Get the types we need to examine. */
2410         find_oplock_types(fsp,
2411                           oplock_request,
2412                           lck,
2413                           &batch_entry,
2414                           &exclusive_entry,
2415                           &got_level2_oplock,
2416                           &got_a_none_oplock);
2417
2418         if (has_delete_on_close(lck, fsp->name_hash)) {
2419                 TALLOC_FREE(lck);
2420                 fd_close(fsp);
2421                 return NT_STATUS_DELETE_PENDING;
2422         }
2423
2424         /* First pass - send break only on batch oplocks. */
2425         if ((req != NULL) &&
2426             delay_for_batch_oplocks(fsp,
2427                                     req->mid,
2428                                     oplock_request,
2429                                     batch_entry)) {
2430                 schedule_defer_open(lck, request_time, req);
2431                 TALLOC_FREE(lck);
2432                 fd_close(fsp);
2433                 return NT_STATUS_SHARING_VIOLATION;
2434         }
2435
2436         status = open_mode_check(conn, lck,
2437                                  access_mask, share_access,
2438                                  &file_existed);
2439
2440         if (NT_STATUS_IS_OK(status)) {
2441                 /* We might be going to allow this open. Check oplock
2442                  * status again. */
2443                 /* Second pass - send break for both batch or
2444                  * exclusive oplocks. */
2445                 if ((req != NULL) &&
2446                     delay_for_exclusive_oplocks(
2447                             fsp,
2448                             req->mid,
2449                             oplock_request,
2450                             exclusive_entry)) {
2451                         schedule_defer_open(lck, request_time, req);
2452                         TALLOC_FREE(lck);
2453                         fd_close(fsp);
2454                         return NT_STATUS_SHARING_VIOLATION;
2455                 }
2456         }
2457
2458         if (!NT_STATUS_IS_OK(status)) {
2459                 uint32 can_access_mask;
2460                 bool can_access = True;
2461
2462                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2463
2464                 /* Check if this can be done with the deny_dos and fcb
2465                  * calls. */
2466                 if (private_flags &
2467                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2468                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2469                         if (req == NULL) {
2470                                 DEBUG(0, ("DOS open without an SMB "
2471                                           "request!\n"));
2472                                 TALLOC_FREE(lck);
2473                                 fd_close(fsp);
2474                                 return NT_STATUS_INTERNAL_ERROR;
2475                         }
2476
2477                         /* Use the client requested access mask here,
2478                          * not the one we open with. */
2479                         status = fcb_or_dos_open(req,
2480                                                  conn,
2481                                                  fsp,
2482                                                  smb_fname,
2483                                                  id,
2484                                                  req->smbpid,
2485                                                  req->vuid,
2486                                                  access_mask,
2487                                                  share_access,
2488                                                  create_options);
2489
2490                         if (NT_STATUS_IS_OK(status)) {
2491                                 TALLOC_FREE(lck);
2492                                 if (pinfo) {
2493                                         *pinfo = FILE_WAS_OPENED;
2494                                 }
2495                                 return NT_STATUS_OK;
2496                         }
2497                 }
2498
2499                 /*
2500                  * This next line is a subtlety we need for
2501                  * MS-Access. If a file open will fail due to share
2502                  * permissions and also for security (access) reasons,
2503                  * we need to return the access failed error, not the
2504                  * share error. We can't open the file due to kernel
2505                  * oplock deadlock (it's possible we failed above on
2506                  * the open_mode_check()) so use a userspace check.
2507                  */
2508
2509                 if (flags & O_RDWR) {
2510                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2511                 } else if (flags & O_WRONLY) {
2512                         can_access_mask = FILE_WRITE_DATA;
2513                 } else {
2514                         can_access_mask = FILE_READ_DATA;
2515                 }
2516
2517                 if (((can_access_mask & FILE_WRITE_DATA) &&
2518                      !CAN_WRITE(conn)) ||
2519                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2520                                                               smb_fname,
2521                                                               false,
2522                                                               can_access_mask))) {
2523                         can_access = False;
2524                 }
2525
2526                 /*
2527                  * If we're returning a share violation, ensure we
2528                  * cope with the braindead 1 second delay (SMB1 only).
2529                  */
2530
2531                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2532                     !conn->sconn->using_smb2 &&
2533                     lp_defer_sharing_violations()) {
2534                         struct timeval timeout;
2535                         struct deferred_open_record state;
2536                         int timeout_usecs;
2537
2538                         /* this is a hack to speed up torture tests
2539                            in 'make test' */
2540                         timeout_usecs = lp_parm_int(SNUM(conn),
2541                                                     "smbd","sharedelay",
2542                                                     SHARING_VIOLATION_USEC_WAIT);
2543
2544                         /* This is a relative time, added to the absolute
2545                            request_time value to get the absolute timeout time.
2546                            Note that if this is the second or greater time we enter
2547                            this codepath for this particular request mid then
2548                            request_time is left as the absolute time of the *first*
2549                            time this request mid was processed. This is what allows
2550                            the request to eventually time out. */
2551
2552                         timeout = timeval_set(0, timeout_usecs);
2553
2554                         /* Nothing actually uses state.delayed_for_oplocks
2555                            but it's handy to differentiate in debug messages
2556                            between a 30 second delay due to oplock break, and
2557                            a 1 second delay for share mode conflicts. */
2558
2559                         state.delayed_for_oplocks = False;
2560                         state.async_open = false;
2561                         state.id = id;
2562
2563                         if ((req != NULL)
2564                             && !request_timed_out(request_time,
2565                                                   timeout)) {
2566                                 defer_open(lck, request_time, timeout,
2567                                            req, &state);
2568                         }
2569                 }
2570
2571                 TALLOC_FREE(lck);
2572                 fd_close(fsp);
2573                 if (can_access) {
2574                         /*
2575                          * We have detected a sharing violation here
2576                          * so return the correct error code
2577                          */
2578                         status = NT_STATUS_SHARING_VIOLATION;
2579                 } else {
2580                         status = NT_STATUS_ACCESS_DENIED;
2581                 }
2582                 return status;
2583         }
2584
2585         grant_fsp_oplock_type(fsp,
2586                               oplock_request,
2587                               got_level2_oplock,
2588                               got_a_none_oplock);
2589
2590         /*
2591          * We have the share entry *locked*.....
2592          */
2593
2594         /* Delete streams if create_disposition requires it */
2595         if (!new_file_created && clear_ads(create_disposition) &&
2596             !is_ntfs_stream_smb_fname(smb_fname)) {
2597                 status = delete_all_streams(conn, smb_fname->base_name);
2598                 if (!NT_STATUS_IS_OK(status)) {
2599                         TALLOC_FREE(lck);
2600                         fd_close(fsp);
2601                         return status;
2602                 }
2603         }
2604
2605         /* note that we ignore failure for the following. It is
2606            basically a hack for NFS, and NFS will never set one of
2607            these only read them. Nobody but Samba can ever set a deny
2608            mode and we have already checked our more authoritative
2609            locking database for permission to set this deny mode. If
2610            the kernel refuses the operations then the kernel is wrong.
2611            note that GPFS supports it as well - jmcd */
2612
2613         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2614                 int ret_flock;
2615                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2616                 if(ret_flock == -1 ){
2617
2618                         TALLOC_FREE(lck);
2619                         fd_close(fsp);
2620
2621                         return NT_STATUS_SHARING_VIOLATION;
2622                 }
2623         }
2624
2625         /*
2626          * At this point onwards, we can guarantee that the share entry
2627          * is locked, whether we created the file or not, and that the
2628          * deny mode is compatible with all current opens.
2629          */
2630
2631         /*
2632          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2633          * but we don't have to store this - just ignore it on access check.
2634          */
2635         if (conn->sconn->using_smb2) {
2636                 /*
2637                  * SMB2 doesn't return it (according to Microsoft tests).
2638                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2639                  * File created with access = 0x7 (Read, Write, Delete)
2640                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2641                  */
2642                 fsp->access_mask = access_mask;
2643         } else {
2644                 /* But SMB1 does. */
2645                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2646         }
2647
2648         if (file_existed) {
2649                 /* stat opens on existing files don't get oplocks. */
2650                 if (is_stat_open(open_access_mask)) {
2651                         fsp->oplock_type = NO_OPLOCK;
2652                 }
2653         }
2654
2655         if (new_file_created) {
2656                 info = FILE_WAS_CREATED;
2657         } else {
2658                 if (flags2 & O_TRUNC) {
2659                         info = FILE_WAS_OVERWRITTEN;
2660                 } else {
2661                         info = FILE_WAS_OPENED;
2662                 }
2663         }
2664
2665         if (pinfo) {
2666                 *pinfo = info;
2667         }
2668
2669         /*
2670          * Setup the oplock info in both the shared memory and
2671          * file structs.
2672          */
2673
2674         status = set_file_oplock(fsp, fsp->oplock_type);
2675         if (!NT_STATUS_IS_OK(status)) {
2676                 /*
2677                  * Could not get the kernel oplock
2678                  */
2679                 fsp->oplock_type = NO_OPLOCK;
2680         }
2681
2682         if (!set_share_mode(lck, fsp, get_current_uid(conn),
2683                             req ? req->mid : 0,
2684                             fsp->oplock_type)) {
2685                 TALLOC_FREE(lck);
2686                 fd_close(fsp);
2687                 return NT_STATUS_NO_MEMORY;
2688         }
2689
2690         /* Handle strange delete on close create semantics. */
2691         if (create_options & FILE_DELETE_ON_CLOSE) {
2692
2693                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2694
2695                 if (!NT_STATUS_IS_OK(status)) {
2696                         /* Remember to delete the mode we just added. */
2697                         del_share_mode(lck, fsp);
2698                         TALLOC_FREE(lck);
2699                         fd_close(fsp);
2700                         return status;
2701                 }
2702                 /* Note that here we set the *inital* delete on close flag,
2703                    not the regular one. The magic gets handled in close. */
2704                 fsp->initial_delete_on_close = True;
2705         }
2706
2707         if (info != FILE_WAS_OPENED) {
2708                 /* Files should be initially set as archive */
2709                 if (lp_map_archive(SNUM(conn)) ||
2710                     lp_store_dos_attributes(SNUM(conn))) {
2711                         if (!posix_open) {
2712                                 if (file_set_dosmode(conn, smb_fname,
2713                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2714                                             parent_dir, true) == 0) {
2715                                         unx_mode = smb_fname->st.st_ex_mode;
2716                                 }
2717                         }
2718                 }
2719         }
2720
2721         /* Determine sparse flag. */
2722         if (posix_open) {
2723                 /* POSIX opens are sparse by default. */
2724                 fsp->is_sparse = true;
2725         } else {
2726                 fsp->is_sparse = (file_existed &&
2727                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2728         }
2729
2730         /*
2731          * Take care of inherited ACLs on created files - if default ACL not
2732          * selected.
2733          */
2734
2735         if (!posix_open && new_file_created && !def_acl) {
2736
2737                 int saved_errno = errno; /* We might get ENOSYS in the next
2738                                           * call.. */
2739
2740                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2741                     errno == ENOSYS) {
2742                         errno = saved_errno; /* Ignore ENOSYS */
2743                 }
2744
2745         } else if (new_unx_mode) {
2746
2747                 int ret = -1;
2748
2749                 /* Attributes need changing. File already existed. */
2750
2751                 {
2752                         int saved_errno = errno; /* We might get ENOSYS in the
2753                                                   * next call.. */
2754                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2755
2756                         if (ret == -1 && errno == ENOSYS) {
2757                                 errno = saved_errno; /* Ignore ENOSYS */
2758                         } else {
2759                                 DEBUG(5, ("open_file_ntcreate: reset "
2760                                           "attributes of file %s to 0%o\n",
2761                                           smb_fname_str_dbg(smb_fname),
2762                                           (unsigned int)new_unx_mode));
2763                                 ret = 0; /* Don't do the fchmod below. */
2764                         }
2765                 }
2766
2767                 if ((ret == -1) &&
2768                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2769                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2770                                   "attributes of file %s to 0%o\n",
2771                                   smb_fname_str_dbg(smb_fname),
2772                                   (unsigned int)new_unx_mode));
2773         }
2774
2775         TALLOC_FREE(lck);
2776
2777         return NT_STATUS_OK;
2778 }
2779
2780
2781 /****************************************************************************
2782  Open a file for for write to ensure that we can fchmod it.
2783 ****************************************************************************/
2784
2785 NTSTATUS open_file_fchmod(connection_struct *conn,
2786                           struct smb_filename *smb_fname,
2787                           files_struct **result)
2788 {
2789         if (!VALID_STAT(smb_fname->st)) {
2790                 return NT_STATUS_INVALID_PARAMETER;
2791         }
2792
2793         return SMB_VFS_CREATE_FILE(
2794                 conn,                                   /* conn */
2795                 NULL,                                   /* req */
2796                 0,                                      /* root_dir_fid */
2797                 smb_fname,                              /* fname */
2798                 FILE_WRITE_DATA,                        /* access_mask */
2799                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2800                     FILE_SHARE_DELETE),
2801                 FILE_OPEN,                              /* create_disposition*/
2802                 0,                                      /* create_options */
2803                 0,                                      /* file_attributes */
2804                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2805                 0,                                      /* allocation_size */
2806                 0,                                      /* private_flags */
2807                 NULL,                                   /* sd */
2808                 NULL,                                   /* ea_list */
2809                 result,                                 /* result */
2810                 NULL);                                  /* pinfo */
2811 }
2812
2813 static NTSTATUS mkdir_internal(connection_struct *conn,
2814                                struct smb_filename *smb_dname,
2815                                uint32 file_attributes)
2816 {
2817         mode_t mode;
2818         char *parent_dir = NULL;
2819         NTSTATUS status;
2820         bool posix_open = false;
2821         bool need_re_stat = false;
2822         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2823
2824         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2825                 DEBUG(5,("mkdir_internal: failing share access "
2826                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2827                 return NT_STATUS_ACCESS_DENIED;
2828         }
2829
2830         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2831                             NULL)) {
2832                 return NT_STATUS_NO_MEMORY;
2833         }
2834
2835         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2836                 posix_open = true;
2837                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2838         } else {
2839                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2840         }
2841
2842         status = check_parent_access(conn,
2843                                         smb_dname,
2844                                         access_mask);
2845         if(!NT_STATUS_IS_OK(status)) {
2846                 DEBUG(5,("mkdir_internal: check_parent_access "
2847                         "on directory %s for path %s returned %s\n",
2848                         parent_dir,
2849                         smb_dname->base_name,
2850                         nt_errstr(status) ));
2851                 return status;
2852         }
2853
2854         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2855                 return map_nt_error_from_unix(errno);
2856         }
2857
2858         /* Ensure we're checking for a symlink here.... */
2859         /* We don't want to get caught by a symlink racer. */
2860
2861         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2862                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2863                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2864                 return map_nt_error_from_unix(errno);
2865         }
2866
2867         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2868                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2869                           smb_fname_str_dbg(smb_dname)));
2870                 return NT_STATUS_NOT_A_DIRECTORY;
2871         }
2872
2873         if (lp_store_dos_attributes(SNUM(conn))) {
2874                 if (!posix_open) {
2875                         file_set_dosmode(conn, smb_dname,
2876                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2877                                          parent_dir, true);
2878                 }
2879         }
2880
2881         if (lp_inherit_perms(SNUM(conn))) {
2882                 inherit_access_posix_acl(conn, parent_dir,
2883                                          smb_dname->base_name, mode);
2884                 need_re_stat = true;
2885         }
2886
2887         if (!posix_open) {
2888                 /*
2889                  * Check if high bits should have been set,
2890                  * then (if bits are missing): add them.
2891                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2892                  * dir.
2893                  */
2894                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2895                     (mode & ~smb_dname->st.st_ex_mode)) {
2896                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2897                                       (smb_dname->st.st_ex_mode |
2898                                           (mode & ~smb_dname->st.st_ex_mode)));
2899                         need_re_stat = true;
2900                 }
2901         }
2902
2903         /* Change the owner if required. */
2904         if (lp_inherit_owner(SNUM(conn))) {
2905                 change_dir_owner_to_parent(conn, parent_dir,
2906                                            smb_dname->base_name,
2907                                            &smb_dname->st);
2908                 need_re_stat = true;
2909         }
2910
2911         if (need_re_stat) {
2912                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2913                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2914                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2915                         return map_nt_error_from_unix(errno);
2916                 }
2917         }
2918
2919         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2920                      smb_dname->base_name);
2921
2922         return NT_STATUS_OK;
2923 }
2924
2925 /****************************************************************************
2926  Open a directory from an NT SMB call.
2927 ****************************************************************************/
2928
2929 static NTSTATUS open_directory(connection_struct *conn,
2930                                struct smb_request *req,
2931                                struct smb_filename *smb_dname,
2932                                uint32 access_mask,
2933                                uint32 share_access,
2934                                uint32 create_disposition,
2935                                uint32 create_options,
2936                                uint32 file_attributes,
2937                                int *pinfo,
2938                                files_struct **result)
2939 {
2940         files_struct *fsp = NULL;
2941         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2942         struct share_mode_lock *lck = NULL;
2943         NTSTATUS status;
2944         struct timespec mtimespec;
2945         int info = 0;
2946
2947         if (is_ntfs_stream_smb_fname(smb_dname)) {
2948                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2949                           smb_fname_str_dbg(smb_dname)));
2950                 return NT_STATUS_NOT_A_DIRECTORY;
2951         }
2952
2953         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2954                 /* Ensure we have a directory attribute. */
2955                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2956         }
2957
2958         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2959                  "share_access = 0x%x create_options = 0x%x, "
2960                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2961                  smb_fname_str_dbg(smb_dname),
2962                  (unsigned int)access_mask,
2963                  (unsigned int)share_access,
2964                  (unsigned int)create_options,
2965                  (unsigned int)create_disposition,
2966                  (unsigned int)file_attributes));
2967
2968         status = smbd_calculate_access_mask(conn, smb_dname, false,
2969                                             access_mask, &access_mask);
2970         if (!NT_STATUS_IS_OK(status)) {
2971                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2972                         "on file %s returned %s\n",
2973                         smb_fname_str_dbg(smb_dname),
2974                         nt_errstr(status)));
2975                 return status;
2976         }
2977
2978         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2979                         !security_token_has_privilege(get_current_nttok(conn),
2980                                         SEC_PRIV_SECURITY)) {
2981                 DEBUG(10, ("open_directory: open on %s "
2982                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2983                         smb_fname_str_dbg(smb_dname)));
2984                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2985         }
2986
2987         switch( create_disposition ) {
2988                 case FILE_OPEN:
2989
2990                         if (!dir_existed) {
2991                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2992                         }
2993
2994                         info = FILE_WAS_OPENED;
2995                         break;
2996
2997                 case FILE_CREATE:
2998
2999                         /* If directory exists error. If directory doesn't
3000                          * exist create. */
3001
3002                         if (dir_existed) {
3003                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
3004                                 DEBUG(2, ("open_directory: unable to create "
3005                                           "%s. Error was %s\n",
3006                                           smb_fname_str_dbg(smb_dname),
3007                                           nt_errstr(status)));
3008                                 return status;
3009                         }
3010
3011                         status = mkdir_internal(conn, smb_dname,
3012                                                 file_attributes);
3013
3014                         if (!NT_STATUS_IS_OK(status)) {
3015                                 DEBUG(2, ("open_directory: unable to create "
3016                                           "%s. Error was %s\n",
3017                                           smb_fname_str_dbg(smb_dname),
3018                                           nt_errstr(status)));
3019                                 return status;
3020                         }
3021
3022                         info = FILE_WAS_CREATED;
3023                         break;
3024
3025                 case FILE_OPEN_IF:
3026                         /*
3027                          * If directory exists open. If directory doesn't
3028                          * exist create.
3029                          */
3030
3031                         if (dir_existed) {
3032                                 status = NT_STATUS_OK;
3033                                 info = FILE_WAS_OPENED;
3034                         } else {
3035                                 status = mkdir_internal(conn, smb_dname,
3036                                                 file_attributes);
3037
3038                                 if (NT_STATUS_IS_OK(status)) {
3039                                         info = FILE_WAS_CREATED;
3040                                 } else {
3041                                         /* Cope with create race. */
3042                                         if (!NT_STATUS_EQUAL(status,
3043                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3044                                                 DEBUG(2, ("open_directory: unable to create "
3045                                                         "%s. Error was %s\n",
3046                                                         smb_fname_str_dbg(smb_dname),
3047                                                         nt_errstr(status)));
3048                                                 return status;
3049                                         }
3050                                         info = FILE_WAS_OPENED;
3051                                 }
3052                         }
3053
3054                         break;
3055
3056                 case FILE_SUPERSEDE:
3057                 case FILE_OVERWRITE:
3058                 case FILE_OVERWRITE_IF:
3059                 default:
3060                         DEBUG(5,("open_directory: invalid create_disposition "
3061                                  "0x%x for directory %s\n",
3062                                  (unsigned int)create_disposition,
3063                                  smb_fname_str_dbg(smb_dname)));
3064                         return NT_STATUS_INVALID_PARAMETER;
3065         }
3066
3067         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3068                 DEBUG(5,("open_directory: %s is not a directory !\n",
3069                          smb_fname_str_dbg(smb_dname)));
3070                 return NT_STATUS_NOT_A_DIRECTORY;
3071         }
3072
3073         if (info == FILE_WAS_OPENED) {
3074                 status = smbd_check_access_rights(conn,
3075                                                 smb_dname,
3076                                                 false,
3077                                                 access_mask);
3078                 if (!NT_STATUS_IS_OK(status)) {
3079                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3080                                 "file %s failed with %s\n",
3081                                 smb_fname_str_dbg(smb_dname),
3082                                 nt_errstr(status)));
3083                         return status;
3084                 }
3085         }
3086
3087         status = file_new(req, conn, &fsp);
3088         if(!NT_STATUS_IS_OK(status)) {
3089                 return status;
3090         }
3091
3092         /*
3093          * Setup the files_struct for it.
3094          */
3095
3096         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3097         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3098         fsp->file_pid = req ? req->smbpid : 0;
3099         fsp->can_lock = False;
3100         fsp->can_read = False;
3101         fsp->can_write = False;
3102
3103         fsp->share_access = share_access;
3104         fsp->fh->private_options = 0;
3105         /*
3106          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3107          */
3108         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3109         fsp->print_file = NULL;
3110         fsp->modified = False;
3111         fsp->oplock_type = NO_OPLOCK;
3112         fsp->sent_oplock_break = NO_BREAK_SENT;
3113         fsp->is_directory = True;
3114         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3115         status = fsp_set_smb_fname(fsp, smb_dname);
3116         if (!NT_STATUS_IS_OK(status)) {
3117                 file_free(req, fsp);
3118                 return status;
3119         }
3120
3121         mtimespec = smb_dname->st.st_ex_mtime;
3122
3123 #ifdef O_DIRECTORY
3124         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3125 #else
3126         /* POSIX allows us to open a directory with O_RDONLY. */
3127         status = fd_open(conn, fsp, O_RDONLY, 0);
3128 #endif
3129         if (!NT_STATUS_IS_OK(status)) {
3130                 DEBUG(5, ("open_directory: Could not open fd for "
3131                         "%s (%s)\n",
3132                         smb_fname_str_dbg(smb_dname),
3133                         nt_errstr(status)));
3134                 file_free(req, fsp);
3135                 return status;
3136         }
3137
3138         status = vfs_stat_fsp(fsp);
3139         if (!NT_STATUS_IS_OK(status)) {
3140                 fd_close(fsp);
3141                 file_free(req, fsp);
3142                 return status;
3143         }
3144
3145         /* Ensure there was no race condition. */
3146         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3147                 DEBUG(5,("open_directory: stat struct differs for "
3148                         "directory %s.\n",
3149                         smb_fname_str_dbg(smb_dname)));
3150                 fd_close(fsp);
3151                 file_free(req, fsp);
3152                 return NT_STATUS_ACCESS_DENIED;
3153         }
3154
3155         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3156                                   conn->connectpath, smb_dname,
3157                                   &mtimespec);
3158
3159         if (lck == NULL) {
3160                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3161                           "%s\n", smb_fname_str_dbg(smb_dname)));
3162                 fd_close(fsp);
3163                 file_free(req, fsp);
3164                 return NT_STATUS_SHARING_VIOLATION;
3165         }
3166
3167         if (has_delete_on_close(lck, fsp->name_hash)) {
3168                 TALLOC_FREE(lck);
3169                 fd_close(fsp);
3170                 file_free(req, fsp);
3171                 return NT_STATUS_DELETE_PENDING;
3172         }
3173
3174         status = open_mode_check(conn, lck,
3175                                 access_mask, share_access,
3176                                  &dir_existed);
3177
3178         if (!NT_STATUS_IS_OK(status)) {
3179                 TALLOC_FREE(lck);
3180                 fd_close(fsp);
3181                 file_free(req, fsp);
3182                 return status;
3183         }
3184
3185         if (!set_share_mode(lck, fsp, get_current_uid(conn),
3186                             req ? req->mid : 0, NO_OPLOCK)) {
3187                 TALLOC_FREE(lck);
3188                 fd_close(fsp);
3189                 file_free(req, fsp);
3190                 return NT_STATUS_NO_MEMORY;
3191         }
3192
3193         /* For directories the delete on close bit at open time seems
3194            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3195         if (create_options & FILE_DELETE_ON_CLOSE) {
3196                 status = can_set_delete_on_close(fsp, 0);
3197                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3198                         del_share_mode(lck, fsp);
3199                         TALLOC_FREE(lck);
3200                         fd_close(fsp);
3201                         file_free(req, fsp);
3202                         return status;
3203                 }
3204
3205                 if (NT_STATUS_IS_OK(status)) {
3206                         /* Note that here we set the *inital* delete on close flag,
3207                            not the regular one. The magic gets handled in close. */
3208                         fsp->initial_delete_on_close = True;
3209                 }
3210         }
3211
3212         TALLOC_FREE(lck);
3213
3214         if (pinfo) {
3215                 *pinfo = info;
3216         }
3217
3218         *result = fsp;
3219         return NT_STATUS_OK;
3220 }
3221
3222 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3223                           struct smb_filename *smb_dname)
3224 {
3225         NTSTATUS status;
3226         files_struct *fsp;
3227
3228         status = SMB_VFS_CREATE_FILE(
3229                 conn,                                   /* conn */
3230                 req,                                    /* req */
3231                 0,                                      /* root_dir_fid */
3232                 smb_dname,                              /* fname */
3233                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3234                 FILE_SHARE_NONE,                        /* share_access */
3235                 FILE_CREATE,                            /* create_disposition*/
3236                 FILE_DIRECTORY_FILE,                    /* create_options */
3237                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3238                 0,                                      /* oplock_request */
3239                 0,                                      /* allocation_size */
3240                 0,                                      /* private_flags */
3241                 NULL,                                   /* sd */
3242                 NULL,                                   /* ea_list */
3243                 &fsp,                                   /* result */
3244                 NULL);                                  /* pinfo */
3245
3246         if (NT_STATUS_IS_OK(status)) {
3247                 close_file(req, fsp, NORMAL_CLOSE);
3248         }
3249
3250         return status;
3251 }
3252
3253 /****************************************************************************
3254  Receive notification that one of our open files has been renamed by another
3255  smbd process.
3256 ****************************************************************************/
3257
3258 void msg_file_was_renamed(struct messaging_context *msg,
3259                           void *private_data,
3260                           uint32_t msg_type,
3261                           struct server_id server_id,
3262                           DATA_BLOB *data)
3263 {
3264         files_struct *fsp;
3265         char *frm = (char *)data->data;
3266         struct file_id id;
3267         const char *sharepath;
3268         const char *base_name;
3269         const char *stream_name;
3270         struct smb_filename *smb_fname = NULL;
3271         size_t sp_len, bn_len;
3272         NTSTATUS status;
3273         struct smbd_server_connection *sconn =
3274                 talloc_get_type_abort(private_data,
3275                 struct smbd_server_connection);
3276
3277         if (data->data == NULL
3278             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3279                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3280                           (int)data->length));
3281                 return;
3282         }
3283
3284         /* Unpack the message. */
3285         pull_file_id_24(frm, &id);
3286         sharepath = &frm[24];
3287         sp_len = strlen(sharepath);
3288         base_name = sharepath + sp_len + 1;
3289         bn_len = strlen(base_name);
3290         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3291
3292         /* stream_name must always be NULL if there is no stream. */
3293         if (stream_name[0] == '\0') {
3294                 stream_name = NULL;
3295         }
3296
3297         smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3298                                         stream_name, NULL);
3299         if (smb_fname == NULL) {
3300                 return;
3301         }
3302
3303         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3304                 "file_id %s\n",
3305                 sharepath, smb_fname_str_dbg(smb_fname),
3306                 file_id_string_tos(&id)));
3307
3308         for(fsp = file_find_di_first(sconn, id); fsp;
3309             fsp = file_find_di_next(fsp)) {
3310                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3311
3312                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3313                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3314                                 smb_fname_str_dbg(smb_fname)));
3315                         status = fsp_set_smb_fname(fsp, smb_fname);
3316                         if (!NT_STATUS_IS_OK(status)) {
3317                                 goto out;
3318                         }
3319                 } else {
3320                         /* TODO. JRA. */
3321                         /* Now we have the complete path we can work out if this is
3322                            actually within this share and adjust newname accordingly. */
3323                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3324                                 "not sharepath %s) "
3325                                 "%s from %s -> %s\n",
3326                                 fsp->conn->connectpath,
3327                                 sharepath,
3328                                 fsp_fnum_dbg(fsp),
3329                                 fsp_str_dbg(fsp),
3330                                 smb_fname_str_dbg(smb_fname)));
3331                 }
3332         }
3333  out:
3334         TALLOC_FREE(smb_fname);
3335         return;
3336 }
3337
3338 /*
3339  * If a main file is opened for delete, all streams need to be checked for
3340  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3341  * If that works, delete them all by setting the delete on close and close.
3342  */
3343
3344 NTSTATUS open_streams_for_delete(connection_struct *conn,
3345                                         const char *fname)
3346 {
3347         struct stream_struct *stream_info = NULL;
3348         files_struct **streams = NULL;
3349         int i;
3350         unsigned int num_streams = 0;
3351         TALLOC_CTX *frame = talloc_stackframe();
3352         NTSTATUS status;
3353
3354         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3355                                 &num_streams, &stream_info);
3356
3357         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3358             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3359                 DEBUG(10, ("no streams around\n"));
3360                 TALLOC_FREE(frame);
3361                 return NT_STATUS_OK;
3362         }
3363
3364         if (!NT_STATUS_IS_OK(status)) {
3365                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3366                            nt_errstr(status)));
3367                 goto fail;
3368         }
3369
3370         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3371                    num_streams));
3372
3373         if (num_streams == 0) {
3374                 TALLOC_FREE(frame);
3375                 return NT_STATUS_OK;
3376         }
3377
3378         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3379         if (streams == NULL) {
3380                 DEBUG(0, ("talloc failed\n"));
3381                 status = NT_STATUS_NO_MEMORY;
3382                 goto fail;
3383         }
3384
3385         for (i=0; i<num_streams; i++) {
3386                 struct smb_filename *smb_fname;
3387
3388                 if (strequal(stream_info[i].name, "::$DATA")) {
3389                         streams[i] = NULL;
3390                         continue;
3391                 }
3392
3393                 smb_fname = synthetic_smb_fname(
3394                         talloc_tos(), fname, stream_info[i].name, NULL);
3395                 if (smb_fname == NULL) {
3396                         status = NT_STATUS_NO_MEMORY;
3397                         goto fail;
3398                 }
3399
3400                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3401                         DEBUG(10, ("Unable to stat stream: %s\n",
3402                                    smb_fname_str_dbg(smb_fname)));
3403                 }
3404
3405                 status = SMB_VFS_CREATE_FILE(
3406                          conn,                  /* conn */
3407                          NULL,                  /* req */
3408                          0,                     /* root_dir_fid */
3409                          smb_fname,             /* fname */
3410                          DELETE_ACCESS,         /* access_mask */
3411                          (FILE_SHARE_READ |     /* share_access */
3412                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3413                          FILE_OPEN,             /* create_disposition*/
3414                          0,                     /* create_options */
3415                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3416                          0,                     /* oplock_request */
3417                          0,                     /* allocation_size */
3418                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3419                          NULL,                  /* sd */
3420                          NULL,                  /* ea_list */
3421                          &streams[i],           /* result */
3422                          NULL);                 /* pinfo */
3423
3424                 if (!NT_STATUS_IS_OK(status)) {
3425                         DEBUG(10, ("Could not open stream %s: %s\n",
3426                                    smb_fname_str_dbg(smb_fname),
3427                                    nt_errstr(status)));
3428
3429                         TALLOC_FREE(smb_fname);
3430                         break;
3431                 }
3432                 TALLOC_FREE(smb_fname);
3433         }
3434
3435         /*
3436          * don't touch the variable "status" beyond this point :-)
3437          */
3438
3439         for (i -= 1 ; i >= 0; i--) {
3440                 if (streams[i] == NULL) {
3441                         continue;
3442                 }
3443
3444                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3445                            fsp_str_dbg(streams[i])));
3446                 close_file(NULL, streams[i], NORMAL_CLOSE);
3447         }
3448
3449  fail:
3450         TALLOC_FREE(frame);
3451         return status;
3452 }
3453
3454 /*********************************************************************
3455  Create a default ACL by inheriting from the parent. If no inheritance
3456  from the parent available, don't set anything. This will leave the actual
3457  permissions the new file or directory already got from the filesystem
3458  as the NT ACL when read.
3459 *********************************************************************/
3460
3461 static NTSTATUS inherit_new_acl(files_struct *fsp)
3462 {
3463         TALLOC_CTX *frame = talloc_stackframe();
3464         char *parent_name = NULL;
3465         struct security_descriptor *parent_desc = NULL;
3466         NTSTATUS status = NT_STATUS_OK;
3467         struct security_descriptor *psd = NULL;
3468         const struct dom_sid *owner_sid = NULL;
3469         const struct dom_sid *group_sid = NULL;
3470         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3471         struct security_token *token = fsp->conn->session_info->security_token;
3472         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3473         bool inheritable_components = false;
3474         bool try_builtin_administrators = false;
3475         const struct dom_sid *BA_U_sid = NULL;
3476         const struct dom_sid *BA_G_sid = NULL;
3477         bool try_system = false;
3478         const struct dom_sid *SY_U_sid = NULL;
3479         const struct dom_sid *SY_G_sid = NULL;
3480         size_t size = 0;
3481
3482         if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3483                 TALLOC_FREE(frame);
3484                 return NT_STATUS_NO_MEMORY;
3485         }
3486
3487         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3488                                     parent_name,
3489                                     (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3490                                     frame,
3491                                     &parent_desc);
3492         if (!NT_STATUS_IS_OK(status)) {
3493                 TALLOC_FREE(frame);
3494                 return status;
3495         }
3496
3497         inheritable_components = sd_has_inheritable_components(parent_desc,
3498                                         fsp->is_directory);
3499
3500         if (!inheritable_components && !inherit_owner) {
3501                 TALLOC_FREE(frame);
3502                 /* Nothing to inherit and not setting owner. */
3503                 return NT_STATUS_OK;
3504         }
3505
3506         /* Create an inherited descriptor from the parent. */
3507
3508         if (DEBUGLEVEL >= 10) {
3509                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3510                         fsp_str_dbg(fsp) ));
3511                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3512         }
3513
3514         /* Inherit from parent descriptor if "inherit owner" set. */
3515         if (inherit_owner) {
3516                 owner_sid = parent_desc->owner_sid;
3517                 group_sid = parent_desc->group_sid;
3518         }
3519
3520         if (owner_sid == NULL) {
3521                 if (security_token_has_builtin_administrators(token)) {
3522                         try_builtin_administrators = true;
3523                 } else if (security_token_is_system(token)) {
3524                         try_builtin_administrators = true;
3525                         try_system = true;
3526                 }
3527         }
3528
3529         if (group_sid == NULL &&
3530             token->num_sids == PRIMARY_GROUP_SID_INDEX)
3531         {
3532                 if (security_token_is_system(token)) {
3533                         try_builtin_administrators = true;
3534                         try_system = true;
3535                 }
3536         }
3537
3538         if (try_builtin_administrators) {
3539                 struct unixid ids;
3540                 bool ok;
3541
3542                 ZERO_STRUCT(ids);
3543                 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
3544                 if (ok) {
3545                         switch (ids.type) {
3546                         case ID_TYPE_BOTH:
3547                                 BA_U_sid = &global_sid_Builtin_Administrators;
3548                                 BA_G_sid = &global_sid_Builtin_Administrators;
3549                                 break;
3550                         case ID_TYPE_UID:
3551                                 BA_U_sid = &global_sid_Builtin_Administrators;
3552                                 break;
3553                         case ID_TYPE_GID:
3554                                 BA_G_sid = &global_sid_Builtin_Administrators;
3555                                 break;
3556                         default:
3557                                 break;
3558                         }
3559                 }
3560         }
3561
3562         if (try_system) {
3563                 struct unixid ids;
3564                 bool ok;
3565
3566                 ZERO_STRUCT(ids);
3567                 ok = sids_to_unixids(&global_sid_System, 1, &ids);
3568                 if (ok) {
3569                         switch (ids.type) {
3570                         case ID_TYPE_BOTH:
3571                                 SY_U_sid = &global_sid_System;
3572                                 SY_G_sid = &global_sid_System;
3573                                 break;
3574                         case ID_TYPE_UID:
3575                                 SY_U_sid = &global_sid_System;
3576                                 break;
3577                         case ID_TYPE_GID:
3578                                 SY_G_sid = &global_sid_System;
3579                                 break;
3580                         default:
3581                                 break;
3582                         }
3583                 }
3584         }
3585
3586         if (owner_sid == NULL) {
3587                 owner_sid = BA_U_sid;
3588         }
3589
3590         if (owner_sid == NULL) {
3591                 owner_sid = SY_U_sid;
3592         }
3593
3594         if (group_sid == NULL) {
3595                 group_sid = SY_G_sid;
3596         }
3597
3598         if (try_system && group_sid == NULL) {
3599                 group_sid = BA_G_sid;
3600         }
3601
3602         if (owner_sid == NULL) {
3603                 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3604         }
3605         if (group_sid == NULL) {
3606                 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
3607                         group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3608                 } else {
3609                         group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
3610                 }
3611         }
3612
3613         status = se_create_child_secdesc(frame,
3614                         &psd,
3615                         &size,
3616                         parent_desc,
3617                         owner_sid,
3618                         group_sid,
3619                         fsp->is_directory);
3620         if (!NT_STATUS_IS_OK(status)) {
3621                 TALLOC_FREE(frame);
3622                 return status;
3623         }
3624
3625         /* If inheritable_components == false,
3626            se_create_child_secdesc()
3627            creates a security desriptor with a NULL dacl
3628            entry, but with SEC_DESC_DACL_PRESENT. We need
3629            to remove that flag. */
3630
3631         if (!inheritable_components) {
3632                 security_info_sent &= ~SECINFO_DACL;
3633                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3634         }
3635
3636         if (DEBUGLEVEL >= 10) {
3637                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3638                         fsp_str_dbg(fsp) ));
3639                 NDR_PRINT_DEBUG(security_descriptor, psd);
3640         }
3641
3642         if (inherit_owner) {
3643                 /* We need to be root to force this. */
3644                 become_root();
3645         }
3646         status = SMB_VFS_FSET_NT_ACL(fsp,
3647                         security_info_sent,
3648                         psd);
3649         if (inherit_owner) {
3650                 unbecome_root();
3651         }
3652         TALLOC_FREE(frame);
3653         return status;
3654 }
3655
3656 /*
3657  * Wrapper around open_file_ntcreate and open_directory
3658  */
3659
3660 static NTSTATUS create_file_unixpath(connection_struct *conn,
3661                                      struct smb_request *req,
3662                                      struct smb_filename *smb_fname,
3663                                      uint32_t access_mask,
3664                                      uint32_t share_access,
3665                                      uint32_t create_disposition,
3666                                      uint32_t create_options,
3667                                      uint32_t file_attributes,
3668                                      uint32_t oplock_request,
3669                                      uint64_t allocation_size,
3670                                      uint32_t private_flags,
3671                                      struct security_descriptor *sd,
3672                                      struct ea_list *ea_list,
3673
3674                                      files_struct **result,
3675                                      int *pinfo)
3676 {
3677         int info = FILE_WAS_OPENED;
3678         files_struct *base_fsp = NULL;
3679         files_struct *fsp = NULL;
3680         NTSTATUS status;
3681
3682         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3683                   "file_attributes = 0x%x, share_access = 0x%x, "
3684                   "create_disposition = 0x%x create_options = 0x%x "
3685                   "oplock_request = 0x%x private_flags = 0x%x "
3686                   "ea_list = 0x%p, sd = 0x%p, "
3687                   "fname = %s\n",
3688                   (unsigned int)access_mask,
3689                   (unsigned int)file_attributes,
3690                   (unsigned int)share_access,
3691                   (unsigned int)create_disposition,
3692                   (unsigned int)create_options,
3693                   (unsigned int)oplock_request,
3694                   (unsigned int)private_flags,
3695                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3696
3697         if (create_options & FILE_OPEN_BY_FILE_ID) {
3698                 status = NT_STATUS_NOT_SUPPORTED;
3699                 goto fail;
3700         }
3701
3702         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3703                 status = NT_STATUS_INVALID_PARAMETER;
3704                 goto fail;
3705         }
3706
3707         if (req == NULL) {
3708                 oplock_request |= INTERNAL_OPEN_ONLY;
3709         }
3710
3711         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3712             && (access_mask & DELETE_ACCESS)
3713             && !is_ntfs_stream_smb_fname(smb_fname)) {
3714                 /*
3715                  * We can't open a file with DELETE access if any of the
3716                  * streams is open without FILE_SHARE_DELETE
3717                  */
3718                 status = open_streams_for_delete(conn, smb_fname->base_name);
3719
3720                 if (!NT_STATUS_IS_OK(status)) {
3721                         goto fail;
3722                 }
3723         }
3724
3725         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3726                         !security_token_has_privilege(get_current_nttok(conn),
3727                                         SEC_PRIV_SECURITY)) {
3728                 DEBUG(10, ("create_file_unixpath: open on %s "
3729                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3730                         smb_fname_str_dbg(smb_fname)));
3731                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3732                 goto fail;
3733         }
3734
3735         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3736             && is_ntfs_stream_smb_fname(smb_fname)
3737             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3738                 uint32 base_create_disposition;
3739                 struct smb_filename *smb_fname_base = NULL;
3740
3741                 if (create_options & FILE_DIRECTORY_FILE) {
3742                         status = NT_STATUS_NOT_A_DIRECTORY;
3743                         goto fail;
3744                 }
3745
3746                 switch (create_disposition) {
3747                 case FILE_OPEN:
3748                         base_create_disposition = FILE_OPEN;
3749                         break;
3750                 default:
3751                         base_create_disposition = FILE_OPEN_IF;
3752                         break;
3753                 }
3754
3755                 /* Create an smb_filename with stream_name == NULL. */
3756                 smb_fname_base = synthetic_smb_fname(talloc_tos(),
3757                                                      smb_fname->base_name,
3758                                                      NULL, NULL);
3759                 if (smb_fname_base == NULL) {
3760                         status = NT_STATUS_NO_MEMORY;
3761                         goto fail;
3762                 }
3763
3764                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3765                         DEBUG(10, ("Unable to stat stream: %s\n",
3766                                    smb_fname_str_dbg(smb_fname_base)));
3767                 }
3768
3769                 /* Open the base file. */
3770                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3771                                               FILE_SHARE_READ
3772                                               | FILE_SHARE_WRITE
3773                                               | FILE_SHARE_DELETE,
3774                                               base_create_disposition,
3775                                               0, 0, 0, 0, 0, NULL, NULL,
3776                                               &base_fsp, NULL);
3777                 TALLOC_FREE(smb_fname_base);
3778
3779                 if (!NT_STATUS_IS_OK(status)) {
3780                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3781                                    "%s\n", smb_fname->base_name,
3782                                    nt_errstr(status)));
3783                         goto fail;
3784                 }
3785                 /* we don't need to low level fd */
3786                 fd_close(base_fsp);
3787         }
3788
3789         /*
3790          * If it's a request for a directory open, deal with it separately.
3791          */
3792
3793         if (create_options & FILE_DIRECTORY_FILE) {
3794
3795                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3796                         status = NT_STATUS_INVALID_PARAMETER;
3797                         goto fail;
3798                 }
3799
3800                 /* Can't open a temp directory. IFS kit test. */
3801                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3802                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3803                         status = NT_STATUS_INVALID_PARAMETER;
3804                         goto fail;
3805                 }
3806
3807                 /*
3808                  * We will get a create directory here if the Win32
3809                  * app specified a security descriptor in the
3810                  * CreateDirectory() call.
3811                  */
3812
3813                 oplock_request = 0;
3814                 status = open_directory(
3815                         conn, req, smb_fname, access_mask, share_access,
3816                         create_disposition, create_options, file_attributes,
3817                         &info, &fsp);
3818         } else {
3819
3820                 /*
3821                  * Ordinary file case.
3822                  */
3823
3824                 status = file_new(req, conn, &fsp);
3825                 if(!NT_STATUS_IS_OK(status)) {
3826                         goto fail;
3827                 }
3828
3829                 status = fsp_set_smb_fname(fsp, smb_fname);
3830                 if (!NT_STATUS_IS_OK(status)) {
3831                         goto fail;
3832                 }
3833
3834                 if (base_fsp) {
3835                         /*
3836                          * We're opening the stream element of a
3837                          * base_fsp we already opened. Set up the
3838                          * base_fsp pointer.
3839                          */
3840                         fsp->base_fsp = base_fsp;
3841                 }
3842
3843                 if (allocation_size) {
3844                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3845                                                         allocation_size);
3846                 }
3847
3848                 status = open_file_ntcreate(conn,
3849                                             req,
3850                                             access_mask,
3851                                             share_access,
3852                                             create_disposition,
3853                                             create_options,
3854                                             file_attributes,
3855                                             oplock_request,
3856                                             private_flags,
3857                                             &info,
3858                                             fsp);
3859
3860                 if(!NT_STATUS_IS_OK(status)) {
3861                         file_free(req, fsp);
3862                         fsp = NULL;
3863                 }
3864
3865                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3866
3867                         /* A stream open never opens a directory */
3868
3869                         if (base_fsp) {
3870                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3871                                 goto fail;
3872                         }
3873
3874                         /*
3875                          * Fail the open if it was explicitly a non-directory
3876                          * file.
3877                          */
3878
3879                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3880                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3881                                 goto fail;
3882                         }
3883
3884                         oplock_request = 0;
3885                         status = open_directory(
3886                                 conn, req, smb_fname, access_mask,
3887                                 share_access, create_disposition,
3888                                 create_options, file_attributes,
3889                                 &info, &fsp);
3890                 }
3891         }
3892
3893         if (!NT_STATUS_IS_OK(status)) {
3894                 goto fail;
3895         }
3896
3897         fsp->base_fsp = base_fsp;
3898
3899         if ((ea_list != NULL) &&
3900             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3901                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3902                 if (!NT_STATUS_IS_OK(status)) {
3903                         goto fail;
3904                 }
3905         }
3906
3907         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3908                 status = NT_STATUS_ACCESS_DENIED;
3909                 goto fail;
3910         }
3911
3912         /* Save the requested allocation size. */
3913         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3914                 if (allocation_size
3915                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3916                         fsp->initial_allocation_size = smb_roundup(
3917                                 fsp->conn, allocation_size);
3918                         if (fsp->is_directory) {
3919                                 /* Can't set allocation size on a directory. */
3920                                 status = NT_STATUS_ACCESS_DENIED;
3921                                 goto fail;
3922                         }
3923                         if (vfs_allocate_file_space(
3924                                     fsp, fsp->initial_allocation_size) == -1) {
3925                                 status = NT_STATUS_DISK_FULL;
3926                                 goto fail;
3927                         }
3928                 } else {
3929                         fsp->initial_allocation_size = smb_roundup(
3930                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3931                 }
3932         } else {
3933                 fsp->initial_allocation_size = 0;
3934         }
3935
3936         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3937                                 fsp->base_fsp == NULL) {
3938                 if (sd != NULL) {
3939                         /*
3940                          * According to the MS documentation, the only time the security
3941                          * descriptor is applied to the opened file is iff we *created* the
3942                          * file; an existing file stays the same.
3943                          *
3944                          * Also, it seems (from observation) that you can open the file with
3945                          * any access mask but you can still write the sd. We need to override
3946                          * the granted access before we call set_sd
3947                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3948                          */
3949
3950                         uint32_t sec_info_sent;
3951                         uint32_t saved_access_mask = fsp->access_mask;
3952
3953                         sec_info_sent = get_sec_info(sd);
3954
3955                         fsp->access_mask = FILE_GENERIC_ALL;
3956
3957                         if (sec_info_sent & (SECINFO_OWNER|
3958                                                 SECINFO_GROUP|
3959                                                 SECINFO_DACL|
3960                                                 SECINFO_SACL)) {
3961                                 status = set_sd(fsp, sd, sec_info_sent);
3962                         }
3963
3964                         fsp->access_mask = saved_access_mask;
3965
3966                         if (!NT_STATUS_IS_OK(status)) {
3967                                 goto fail;
3968                         }
3969                 } else if (lp_inherit_acls(SNUM(conn))) {
3970                         /* Inherit from parent. Errors here are not fatal. */
3971                         status = inherit_new_acl(fsp);
3972                         if (!NT_STATUS_IS_OK(status)) {
3973                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3974                                         fsp_str_dbg(fsp),
3975                                         nt_errstr(status) ));
3976                         }
3977                 }
3978         }
3979
3980         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3981
3982         *result = fsp;
3983         if (pinfo != NULL) {
3984                 *pinfo = info;
3985         }
3986
3987         smb_fname->st = fsp->fsp_name->st;
3988
3989         return NT_STATUS_OK;
3990
3991  fail:
3992         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3993
3994         if (fsp != NULL) {
3995                 if (base_fsp && fsp->base_fsp == base_fsp) {
3996                         /*
3997                          * The close_file below will close
3998                          * fsp->base_fsp.
3999                          */
4000                         base_fsp = NULL;
4001                 }
4002                 close_file(req, fsp, ERROR_CLOSE);
4003                 fsp = NULL;
4004         }
4005         if (base_fsp != NULL) {
4006                 close_file(req, base_fsp, ERROR_CLOSE);
4007                 base_fsp = NULL;
4008         }
4009         return status;
4010 }
4011
4012 /*
4013  * Calculate the full path name given a relative fid.
4014  */
4015 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4016                                    struct smb_request *req,
4017                                    uint16_t root_dir_fid,
4018                                    const struct smb_filename *smb_fname,
4019                                    struct smb_filename **smb_fname_out)
4020 {
4021         files_struct *dir_fsp;
4022         char *parent_fname = NULL;
4023         char *new_base_name = NULL;
4024         NTSTATUS status;
4025
4026         if (root_dir_fid == 0 || !smb_fname) {
4027                 status = NT_STATUS_INTERNAL_ERROR;
4028                 goto out;
4029         }
4030
4031         dir_fsp = file_fsp(req, root_dir_fid);
4032
4033         if (dir_fsp == NULL) {
4034                 status = NT_STATUS_INVALID_HANDLE;
4035                 goto out;
4036         }
4037
4038         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4039                 status = NT_STATUS_INVALID_HANDLE;
4040                 goto out;
4041         }
4042
4043         if (!dir_fsp->is_directory) {
4044
4045                 /*
4046                  * Check to see if this is a mac fork of some kind.
4047                  */
4048
4049                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4050                     is_ntfs_stream_smb_fname(smb_fname)) {
4051                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4052                         goto out;
4053                 }
4054
4055                 /*
4056                   we need to handle the case when we get a
4057                   relative open relative to a file and the
4058                   pathname is blank - this is a reopen!
4059                   (hint from demyn plantenberg)
4060                 */
4061
4062                 status = NT_STATUS_INVALID_HANDLE;
4063                 goto out;
4064         }
4065
4066         if (ISDOT(dir_fsp->fsp_name->base_name)) {
4067                 /*
4068                  * We're at the toplevel dir, the final file name
4069                  * must not contain ./, as this is filtered out
4070                  * normally by srvstr_get_path and unix_convert
4071                  * explicitly rejects paths containing ./.
4072                  */
4073                 parent_fname = talloc_strdup(talloc_tos(), "");
4074                 if (parent_fname == NULL) {
4075                         status = NT_STATUS_NO_MEMORY;
4076                         goto out;
4077                 }
4078         } else {
4079                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4080
4081                 /*
4082                  * Copy in the base directory name.
4083                  */
4084
4085                 parent_fname = talloc_array(talloc_tos(), char,
4086                     dir_name_len+2);
4087                 if (parent_fname == NULL) {
4088                         status = NT_STATUS_NO_MEMORY;
4089                         goto out;
4090                 }
4091                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4092                     dir_name_len+1);
4093
4094                 /*
4095                  * Ensure it ends in a '/'.
4096                  * We used TALLOC_SIZE +2 to add space for the '/'.
4097                  */
4098
4099                 if(dir_name_len
4100                     && (parent_fname[dir_name_len-1] != '\\')
4101                     && (parent_fname[dir_name_len-1] != '/')) {
4102                         parent_fname[dir_name_len] = '/';
4103                         parent_fname[dir_name_len+1] = '\0';
4104                 }
4105         }
4106
4107         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4108                                         smb_fname->base_name);
4109         if (new_base_name == NULL) {
4110                 status = NT_STATUS_NO_MEMORY;
4111                 goto out;
4112         }
4113
4114         status = filename_convert(req,
4115                                 conn,
4116                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
4117                                 new_base_name,
4118                                 0,
4119                                 NULL,
4120                                 smb_fname_out);
4121         if (!NT_STATUS_IS_OK(status)) {
4122                 goto out;
4123         }
4124
4125  out:
4126         TALLOC_FREE(parent_fname);
4127         TALLOC_FREE(new_base_name);
4128         return status;
4129 }
4130
4131 NTSTATUS create_file_default(connection_struct *conn,
4132                              struct smb_request *req,
4133                              uint16_t root_dir_fid,
4134                              struct smb_filename *smb_fname,
4135                              uint32_t access_mask,
4136                              uint32_t share_access,
4137                              uint32_t create_disposition,
4138                              uint32_t create_options,
4139                              uint32_t file_attributes,
4140                              uint32_t oplock_request,
4141                              uint64_t allocation_size,
4142                              uint32_t private_flags,
4143                              struct security_descriptor *sd,
4144                              struct ea_list *ea_list,
4145                              files_struct **result,
4146                              int *pinfo)
4147 {
4148         int info = FILE_WAS_OPENED;
4149         files_struct *fsp = NULL;
4150         NTSTATUS status;
4151         bool stream_name = false;
4152
4153         DEBUG(10,("create_file: access_mask = 0x%x "
4154                   "file_attributes = 0x%x, share_access = 0x%x, "
4155                   "create_disposition = 0x%x create_options = 0x%x "
4156                   "oplock_request = 0x%x "
4157                   "private_flags = 0x%x "
4158                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4159                   "fname = %s\n",
4160                   (unsigned int)access_mask,
4161                   (unsigned int)file_attributes,
4162                   (unsigned int)share_access,
4163                   (unsigned int)create_disposition,
4164                   (unsigned int)create_options,
4165                   (unsigned int)oplock_request,
4166                   (unsigned int)private_flags,
4167                   (unsigned int)root_dir_fid,
4168                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4169
4170         /*
4171          * Calculate the filename from the root_dir_if if necessary.
4172          */
4173
4174         if (root_dir_fid != 0) {
4175                 struct smb_filename *smb_fname_out = NULL;
4176                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4177                                                    smb_fname, &smb_fname_out);
4178                 if (!NT_STATUS_IS_OK(status)) {
4179                         goto fail;
4180                 }
4181                 smb_fname = smb_fname_out;
4182         }
4183
4184         /*
4185          * Check to see if this is a mac fork of some kind.
4186          */
4187
4188         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4189         if (stream_name) {
4190                 enum FAKE_FILE_TYPE fake_file_type;
4191
4192                 fake_file_type = is_fake_file(smb_fname);
4193
4194                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4195
4196                         /*
4197                          * Here we go! support for changing the disk quotas
4198                          * --metze
4199                          *
4200                          * We need to fake up to open this MAGIC QUOTA file
4201                          * and return a valid FID.
4202                          *
4203                          * w2k close this file directly after openening xp
4204                          * also tries a QUERY_FILE_INFO on the file and then
4205                          * close it
4206                          */
4207                         status = open_fake_file(req, conn, req->vuid,
4208                                                 fake_file_type, smb_fname,
4209                                                 access_mask, &fsp);
4210                         if (!NT_STATUS_IS_OK(status)) {
4211                                 goto fail;
4212                         }
4213
4214                         ZERO_STRUCT(smb_fname->st);
4215                         goto done;
4216                 }
4217
4218                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4219                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4220                         goto fail;
4221                 }
4222         }
4223
4224         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4225                 int ret;
4226                 smb_fname->stream_name = NULL;
4227                 /* We have to handle this error here. */
4228                 if (create_options & FILE_DIRECTORY_FILE) {
4229                         status = NT_STATUS_NOT_A_DIRECTORY;
4230                         goto fail;
4231                 }
4232                 if (lp_posix_pathnames()) {
4233                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4234                 } else {
4235                         ret = SMB_VFS_STAT(conn, smb_fname);
4236                 }
4237
4238                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4239                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4240                         goto fail;
4241                 }
4242         }
4243
4244         status = create_file_unixpath(
4245                 conn, req, smb_fname, access_mask, share_access,
4246                 create_disposition, create_options, file_attributes,
4247                 oplock_request, allocation_size, private_flags,
4248                 sd, ea_list,
4249                 &fsp, &info);
4250
4251         if (!NT_STATUS_IS_OK(status)) {
4252                 goto fail;
4253         }
4254
4255  done:
4256         DEBUG(10, ("create_file: info=%d\n", info));
4257
4258         *result = fsp;
4259         if (pinfo != NULL) {
4260                 *pinfo = info;
4261         }
4262         return NT_STATUS_OK;
4263
4264  fail:
4265         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4266
4267         if (fsp != NULL) {
4268                 close_file(req, fsp, ERROR_CLOSE);
4269                 fsp = NULL;
4270         }
4271         return status;
4272 }