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
  24 extern const struct generic_mapping file_generic_mapping;
  25 extern struct current_user current_user;
  26 extern userdom_struct current_user_info;
  27 extern bool global_client_failed_oplock_break;
  28
  29 struct deferred_open_record {
  30         bool delayed_for_oplocks;
  31         struct file_id id;
  32 };
  33
  34 /****************************************************************************
  35  fd support routines - attempt to do a dos_open.
  36 ****************************************************************************/
  37
  38 static NTSTATUS fd_open(struct connection_struct *conn,
  39                     const char *fname,
  40                     files_struct *fsp,
  41                     int flags,
  42                     mode_t mode)
  43 {
  44         NTSTATUS status = NT_STATUS_OK;
  45
  46 #ifdef O_NOFOLLOW
  47         /*
  48          * Never follow symlinks on a POSIX client. The
  49          * client should be doing this.
  50          */
  51
  52         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
  53                 flags |= O_NOFOLLOW;
  54         }
  55 #endif
  56
  57         fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
  58         if (fsp->fh->fd == -1) {
  59                 status = map_nt_error_from_unix(errno);
  60         }
  61
  62         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
  63                     fname, flags, (int)mode, fsp->fh->fd,
  64                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
  65
  66         return status;
  67 }
  68
  69 /****************************************************************************
  70  Close the file associated with a fsp.
  71 ****************************************************************************/
  72
  73 NTSTATUS fd_close(files_struct *fsp)
  74 {
  75         if (fsp->fh->fd == -1) {
  76                 return NT_STATUS_OK; /* What we used to call a stat open. */
  77         }
  78         if (fsp->fh->ref_count > 1) {
  79                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
  80         }
  81         return fd_close_posix(fsp);
  82 }
  83
  84 /****************************************************************************
  85  Change the ownership of a file to that of the parent directory.
  86  Do this by fd if possible.
  87 ****************************************************************************/
  88
  89 static void change_file_owner_to_parent(connection_struct *conn,
  90                                         const char *inherit_from_dir,
  91                                         files_struct *fsp)
  92 {
  93         SMB_STRUCT_STAT parent_st;
  94         int ret;
  95
  96         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
  97         if (ret == -1) {
  98                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
  99                          "directory %s. Error was %s\n",
 100                          inherit_from_dir, strerror(errno) ));
 101                 return;
 102         }
 103
 104         become_root();
 105         ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
 106         unbecome_root();
 107         if (ret == -1) {
 108                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 109                          "file %s to parent directory uid %u. Error "
 110                          "was %s\n", fsp->fsp_name,
 111                          (unsigned int)parent_st.st_uid,
 112                          strerror(errno) ));
 113         }
 114
 115         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 116                   "parent directory uid %u.\n", fsp->fsp_name,
 117                   (unsigned int)parent_st.st_uid ));
 118 }
 119
 120 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 121                                        const char *inherit_from_dir,
 122                                        const char *fname,
 123                                        SMB_STRUCT_STAT *psbuf)
 124 {
 125         char *saved_dir = NULL;
 126         SMB_STRUCT_STAT sbuf;
 127         SMB_STRUCT_STAT parent_st;
 128         TALLOC_CTX *ctx = talloc_tos();
 129         NTSTATUS status = NT_STATUS_OK;
 130         int ret;
 131
 132         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 133         if (ret == -1) {
 134                 status = map_nt_error_from_unix(errno);
 135                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 136                          "directory %s. Error was %s\n",
 137                          inherit_from_dir, strerror(errno) ));
 138                 return status;
 139         }
 140
 141         /* We've already done an lstat into psbuf, and we know it's a
 142            directory. If we can cd into the directory and the dev/ino
 143            are the same then we can safely chown without races as
 144            we're locking the directory in place by being in it.  This
 145            should work on any UNIX (thanks tridge :-). JRA.
 146         */
 147
 148         saved_dir = vfs_GetWd(ctx,conn);
 149         if (!saved_dir) {
 150                 status = map_nt_error_from_unix(errno);
 151                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 152                          "current working directory. Error was %s\n",
 153                          strerror(errno)));
 154                 return status;
 155         }
 156
 157         /* Chdir into the new path. */
 158         if (vfs_ChDir(conn, fname) == -1) {
 159                 status = map_nt_error_from_unix(errno);
 160                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 161                          "current working directory to %s. Error "
 162                          "was %s\n", fname, strerror(errno) ));
 163                 goto out;
 164         }
 165
 166         if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
 167                 status = map_nt_error_from_unix(errno);
 168                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 169                          "directory '.' (%s) Error was %s\n",
 170                          fname, strerror(errno)));
 171                 goto out;
 172         }
 173
 174         /* Ensure we're pointing at the same place. */
 175         if (sbuf.st_dev != psbuf->st_dev ||
 176             sbuf.st_ino != psbuf->st_ino ||
 177             sbuf.st_mode != psbuf->st_mode ) {
 178                 DEBUG(0,("change_dir_owner_to_parent: "
 179                          "device/inode/mode on directory %s changed. "
 180                          "Refusing to chown !\n", fname ));
 181                 status = NT_STATUS_ACCESS_DENIED;
 182                 goto out;
 183         }
 184
 185         become_root();
 186         ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
 187         unbecome_root();
 188         if (ret == -1) {
 189                 status = map_nt_error_from_unix(errno);
 190                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 191                           "directory %s to parent directory uid %u. "
 192                           "Error was %s\n", fname,
 193                           (unsigned int)parent_st.st_uid, strerror(errno) ));
 194                 goto out;
 195         }
 196
 197         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 198                   "directory %s to parent directory uid %u.\n",
 199                   fname, (unsigned int)parent_st.st_uid ));
 200
 201  out:
 202
 203         vfs_ChDir(conn,saved_dir);
 204         return status;
 205 }
 206
 207 /****************************************************************************
 208  Open a file.
 209 ****************************************************************************/
 210
 211 static NTSTATUS open_file(files_struct *fsp,
 212                           connection_struct *conn,
 213                           struct smb_request *req,
 214                           const char *parent_dir,
 215                           const char *name,
 216                           const char *path,
 217                           SMB_STRUCT_STAT *psbuf,
 218                           int flags,
 219                           mode_t unx_mode,
 220                           uint32 access_mask, /* client requested access mask. */
 221                           uint32 open_access_mask) /* what we're actually using in the open. */
 222 {
 223         NTSTATUS status = NT_STATUS_OK;
 224         int accmode = (flags & O_ACCMODE);
 225         int local_flags = flags;
 226         bool file_existed = VALID_STAT(*psbuf);
 227
 228         fsp->fh->fd = -1;
 229         errno = EPERM;
 230
 231         /* Check permissions */
 232
 233         /*
 234          * This code was changed after seeing a client open request
 235          * containing the open mode of (DENY_WRITE/read-only) with
 236          * the 'create if not exist' bit set. The previous code
 237          * would fail to open the file read only on a read-only share
 238          * as it was checking the flags parameter  directly against O_RDONLY,
 239          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 240          * JRA.
 241          */
 242
 243         if (!CAN_WRITE(conn)) {
 244                 /* It's a read-only share - fail if we wanted to write. */
 245                 if(accmode != O_RDONLY) {
 246                         DEBUG(3,("Permission denied opening %s\n", path));
 247                         return NT_STATUS_ACCESS_DENIED;
 248                 } else if(flags & O_CREAT) {
 249                         /* We don't want to write - but we must make sure that
 250                            O_CREAT doesn't create the file if we have write
 251                            access into the directory.
 252                         */
 253                         flags &= ~O_CREAT;
 254                         local_flags &= ~O_CREAT;
 255                 }
 256         }
 257
 258         /*
 259          * This little piece of insanity is inspired by the
 260          * fact that an NT client can open a file for O_RDONLY,
 261          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 262          * If the client *can* write to the file, then it expects to
 263          * truncate the file, even though it is opening for readonly.
 264          * Quicken uses this stupid trick in backup file creation...
 265          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 266          * for helping track this one down. It didn't bite us in 2.0.x
 267          * as we always opened files read-write in that release. JRA.
 268          */
 269
 270         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 271                 DEBUG(10,("open_file: truncate requested on read-only open "
 272                           "for file %s\n", path));
 273                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 274         }
 275
 276         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 277             (!file_existed && (local_flags & O_CREAT)) ||
 278             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 279
 280                 /*
 281                  * We can't actually truncate here as the file may be locked.
 282                  * open_file_ntcreate will take care of the truncate later. JRA.
 283                  */
 284
 285                 local_flags &= ~O_TRUNC;
 286
 287 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 288                 /*
 289                  * We would block on opening a FIFO with no one else on the
 290                  * other end. Do what we used to do and add O_NONBLOCK to the
 291                  * open flags. JRA.
 292                  */
 293
 294                 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
 295                         local_flags |= O_NONBLOCK;
 296                 }
 297 #endif
 298
 299                 /* Don't create files with Microsoft wildcard characters. */
 300                 if ((local_flags & O_CREAT) && !file_existed &&
 301                     ms_has_wild(path))  {
 302                         return NT_STATUS_OBJECT_NAME_INVALID;
 303                 }
 304
 305                 /* Actually do the open */
 306                 status = fd_open(conn, path, fsp, local_flags, unx_mode);
 307                 if (!NT_STATUS_IS_OK(status)) {
 308                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 309                                  "(flags=%d)\n",
 310                                  path,nt_errstr(status),local_flags,flags));
 311                         return status;
 312                 }
 313
 314                 if ((local_flags & O_CREAT) && !file_existed) {
 315
 316                         /* Inherit the ACL if required */
 317                         if (lp_inherit_perms(SNUM(conn))) {
 318                                 inherit_access_acl(conn, parent_dir, path,
 319                                                    unx_mode);
 320                         }
 321
 322                         /* Change the owner if required. */
 323                         if (lp_inherit_owner(SNUM(conn))) {
 324                                 change_file_owner_to_parent(conn, parent_dir,
 325                                                             fsp);
 326                         }
 327
 328                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 329                                      FILE_NOTIFY_CHANGE_FILE_NAME, path);
 330                 }
 331
 332         } else {
 333                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 334         }
 335
 336         if (!file_existed) {
 337                 int ret;
 338
 339                 if (fsp->fh->fd == -1) {
 340                         ret = SMB_VFS_STAT(conn, path, psbuf);
 341                 } else {
 342                         ret = SMB_VFS_FSTAT(fsp, psbuf);
 343                         /* If we have an fd, this stat should succeed. */
 344                         if (ret == -1) {
 345                                 DEBUG(0,("Error doing fstat on open file %s "
 346                                          "(%s)\n", path,strerror(errno) ));
 347                         }
 348                 }
 349
 350                 /* For a non-io open, this stat failing means file not found. JRA */
 351                 if (ret == -1) {
 352                         status = map_nt_error_from_unix(errno);
 353                         fd_close(fsp);
 354                         return status;
 355                 }
 356         }
 357
 358         /*
 359          * POSIX allows read-only opens of directories. We don't
 360          * want to do this (we use a different code path for this)
 361          * so catch a directory open and return an EISDIR. JRA.
 362          */
 363
 364         if(S_ISDIR(psbuf->st_mode)) {
 365                 fd_close(fsp);
 366                 errno = EISDIR;
 367                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 368         }
 369
 370         fsp->mode = psbuf->st_mode;
 371         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
 372         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 373         fsp->file_pid = req ? req->smbpid : 0;
 374         fsp->can_lock = True;
 375         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 376         if (!CAN_WRITE(conn)) {
 377                 fsp->can_write = False;
 378         } else {
 379                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 380                         True : False;
 381         }
 382         fsp->print_file = False;
 383         fsp->modified = False;
 384         fsp->sent_oplock_break = NO_BREAK_SENT;
 385         fsp->is_directory = False;
 386         fsp->is_stat = False;
 387         if (conn->aio_write_behind_list &&
 388             is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
 389                 fsp->aio_write_behind = True;
 390         }
 391
 392         string_set(&fsp->fsp_name, path);
 393         fsp->wcp = NULL; /* Write cache pointer. */
 394
 395         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 396                  *current_user_info.smb_name ?
 397                  current_user_info.smb_name : conn->user,fsp->fsp_name,
 398                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 399                  conn->num_files_open + 1));
 400
 401         errno = 0;
 402         return NT_STATUS_OK;
 403 }
 404
 405 /*******************************************************************
 406  Return True if the filename is one of the special executable types.
 407 ********************************************************************/
 408
 409 static bool is_executable(const char *fname)
 410 {
 411         if ((fname = strrchr_m(fname,'.'))) {
 412                 if (strequal(fname,".com") ||
 413                     strequal(fname,".dll") ||
 414                     strequal(fname,".exe") ||
 415                     strequal(fname,".sym")) {
 416                         return True;
 417                 }
 418         }
 419         return False;
 420 }
 421
 422 /****************************************************************************
 423  Check if we can open a file with a share mode.
 424  Returns True if conflict, False if not.
 425 ****************************************************************************/
 426
 427 static bool share_conflict(struct share_mode_entry *entry,
 428                            uint32 access_mask,
 429                            uint32 share_access)
 430 {
 431         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 432                   "entry->share_access = 0x%x, "
 433                   "entry->private_options = 0x%x\n",
 434                   (unsigned int)entry->access_mask,
 435                   (unsigned int)entry->share_access,
 436                   (unsigned int)entry->private_options));
 437
 438         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 439                   (unsigned int)access_mask, (unsigned int)share_access));
 440
 441         if ((entry->access_mask & (FILE_WRITE_DATA|
 442                                    FILE_APPEND_DATA|
 443                                    FILE_READ_DATA|
 444                                    FILE_EXECUTE|
 445                                    DELETE_ACCESS)) == 0) {
 446                 DEBUG(10,("share_conflict: No conflict due to "
 447                           "entry->access_mask = 0x%x\n",
 448                           (unsigned int)entry->access_mask ));
 449                 return False;
 450         }
 451
 452         if ((access_mask & (FILE_WRITE_DATA|
 453                             FILE_APPEND_DATA|
 454                             FILE_READ_DATA|
 455                             FILE_EXECUTE|
 456                             DELETE_ACCESS)) == 0) {
 457                 DEBUG(10,("share_conflict: No conflict due to "
 458                           "access_mask = 0x%x\n",
 459                           (unsigned int)access_mask ));
 460                 return False;
 461         }
 462
 463 #if 1 /* JRA TEST - Superdebug. */
 464 #define CHECK_MASK(num, am, right, sa, share) \
 465         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 466                 (unsigned int)(num), (unsigned int)(am), \
 467                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 468         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 469                 (unsigned int)(num), (unsigned int)(sa), \
 470                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 471         if (((am) & (right)) && !((sa) & (share))) { \
 472                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 473 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 474                         (unsigned int)(share) )); \
 475                 return True; \
 476         }
 477 #else
 478 #define CHECK_MASK(num, am, right, sa, share) \
 479         if (((am) & (right)) && !((sa) & (share))) { \
 480                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 481 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 482                         (unsigned int)(share) )); \
 483                 return True; \
 484         }
 485 #endif
 486
 487         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 488                    share_access, FILE_SHARE_WRITE);
 489         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 490                    entry->share_access, FILE_SHARE_WRITE);
 491
 492         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 493                    share_access, FILE_SHARE_READ);
 494         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 495                    entry->share_access, FILE_SHARE_READ);
 496
 497         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 498                    share_access, FILE_SHARE_DELETE);
 499         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 500                    entry->share_access, FILE_SHARE_DELETE);
 501
 502         DEBUG(10,("share_conflict: No conflict.\n"));
 503         return False;
 504 }
 505
 506 #if defined(DEVELOPER)
 507 static void validate_my_share_entries(int num,
 508                                       struct share_mode_entry *share_entry)
 509 {
 510         files_struct *fsp;
 511
 512         if (!procid_is_me(&share_entry->pid)) {
 513                 return;
 514         }
 515
 516         if (is_deferred_open_entry(share_entry) &&
 517             !open_was_deferred(share_entry->op_mid)) {
 518                 char *str = talloc_asprintf(talloc_tos(),
 519                         "Got a deferred entry without a request: "
 520                         "PANIC: %s\n",
 521                         share_mode_str(talloc_tos(), num, share_entry));
 522                 smb_panic(str);
 523         }
 524
 525         if (!is_valid_share_mode_entry(share_entry)) {
 526                 return;
 527         }
 528
 529         fsp = file_find_dif(share_entry->id,
 530                             share_entry->share_file_id);
 531         if (!fsp) {
 532                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 533                          share_mode_str(talloc_tos(), num, share_entry) ));
 534                 smb_panic("validate_my_share_entries: Cannot match a "
 535                           "share entry with an open file\n");
 536         }
 537
 538         if (is_deferred_open_entry(share_entry) ||
 539             is_unused_share_mode_entry(share_entry)) {
 540                 goto panic;
 541         }
 542
 543         if ((share_entry->op_type == NO_OPLOCK) &&
 544             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 545                 /* Someone has already written to it, but I haven't yet
 546                  * noticed */
 547                 return;
 548         }
 549
 550         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 551                 goto panic;
 552         }
 553
 554         return;
 555
 556  panic:
 557         {
 558                 char *str;
 559                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 560                          share_mode_str(talloc_tos(), num, share_entry) ));
 561                 str = talloc_asprintf(talloc_tos(),
 562                         "validate_my_share_entries: "
 563                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 564                          fsp->fsp_name, (unsigned int)fsp->oplock_type,
 565                          (unsigned int)share_entry->op_type );
 566                 smb_panic(str);
 567         }
 568 }
 569 #endif
 570
 571 static bool is_stat_open(uint32 access_mask)
 572 {
 573         return (access_mask &&
 574                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 575                                   FILE_WRITE_ATTRIBUTES))==0) &&
 576                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 577                                  FILE_WRITE_ATTRIBUTES)) != 0));
 578 }
 579
 580 /****************************************************************************
 581  Deal with share modes
 582  Invarient: Share mode must be locked on entry and exit.
 583  Returns -1 on error, or number of share modes on success (may be zero).
 584 ****************************************************************************/
 585
 586 static NTSTATUS open_mode_check(connection_struct *conn,
 587                                 const char *fname,
 588                                 struct share_mode_lock *lck,
 589                                 uint32 access_mask,
 590                                 uint32 share_access,
 591                                 uint32 create_options,
 592                                 bool *file_existed)
 593 {
 594         int i;
 595
 596         if(lck->num_share_modes == 0) {
 597                 return NT_STATUS_OK;
 598         }
 599
 600         *file_existed = True;
 601
 602         /* A delete on close prohibits everything */
 603
 604         if (lck->delete_on_close) {
 605                 return NT_STATUS_DELETE_PENDING;
 606         }
 607
 608         if (is_stat_open(access_mask)) {
 609                 /* Stat open that doesn't trigger oplock breaks or share mode
 610                  * checks... ! JRA. */
 611                 return NT_STATUS_OK;
 612         }
 613
 614         /*
 615          * Check if the share modes will give us access.
 616          */
 617
 618 #if defined(DEVELOPER)
 619         for(i = 0; i < lck->num_share_modes; i++) {
 620                 validate_my_share_entries(i, &lck->share_modes[i]);
 621         }
 622 #endif
 623
 624         if (!lp_share_modes(SNUM(conn))) {
 625                 return NT_STATUS_OK;
 626         }
 627
 628         /* Now we check the share modes, after any oplock breaks. */
 629         for(i = 0; i < lck->num_share_modes; i++) {
 630
 631                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 632                         continue;
 633                 }
 634
 635                 /* someone else has a share lock on it, check to see if we can
 636                  * too */
 637                 if (share_conflict(&lck->share_modes[i],
 638                                    access_mask, share_access)) {
 639                         return NT_STATUS_SHARING_VIOLATION;
 640                 }
 641         }
 642
 643         return NT_STATUS_OK;
 644 }
 645
 646 static bool is_delete_request(files_struct *fsp) {
 647         return ((fsp->access_mask == DELETE_ACCESS) &&
 648                 (fsp->oplock_type == NO_OPLOCK));
 649 }
 650
 651 /*
 652  * 1) No files open at all or internal open: Grant whatever the client wants.
 653  *
 654  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 655  *    request, break if the oplock around is a batch oplock. If it's another
 656  *    requested access type, break.
 657  *
 658  * 3) Only level2 around: Grant level2 and do nothing else.
 659  */
 660
 661 static bool delay_for_oplocks(struct share_mode_lock *lck,
 662                               files_struct *fsp,
 663                               uint16 mid,
 664                               int pass_number,
 665                               int oplock_request)
 666 {
 667         int i;
 668         struct share_mode_entry *exclusive = NULL;
 669         bool valid_entry = False;
 670         bool delay_it = False;
 671         bool have_level2 = False;
 672         NTSTATUS status;
 673         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 674
 675         if (oplock_request & INTERNAL_OPEN_ONLY) {
 676                 fsp->oplock_type = NO_OPLOCK;
 677         }
 678
 679         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 680                 return False;
 681         }
 682
 683         for (i=0; i<lck->num_share_modes; i++) {
 684
 685                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 686                         continue;
 687                 }
 688
 689                 /* At least one entry is not an invalid or deferred entry. */
 690                 valid_entry = True;
 691
 692                 if (pass_number == 1) {
 693                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 694                                 SMB_ASSERT(exclusive == NULL);
 695                                 exclusive = &lck->share_modes[i];
 696                         }
 697                 } else {
 698                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 699                                 SMB_ASSERT(exclusive == NULL);
 700                                 exclusive = &lck->share_modes[i];
 701                         }
 702                 }
 703
 704                 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
 705                         SMB_ASSERT(exclusive == NULL);
 706                         have_level2 = True;
 707                 }
 708         }
 709
 710         if (!valid_entry) {
 711                 /* All entries are placeholders or deferred.
 712                  * Directly grant whatever the client wants. */
 713                 if (fsp->oplock_type == NO_OPLOCK) {
 714                         /* Store a level2 oplock, but don't tell the client */
 715                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 716                 }
 717                 return False;
 718         }
 719
 720         if (exclusive != NULL) { /* Found an exclusive oplock */
 721                 SMB_ASSERT(!have_level2);
 722                 delay_it = is_delete_request(fsp) ?
 723                         BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
 724         }
 725
 726         if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
 727                 /* We can at most grant level2 as there are other
 728                  * level2 or NO_OPLOCK entries. */
 729                 fsp->oplock_type = LEVEL_II_OPLOCK;
 730         }
 731
 732         if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
 733                 /* Store a level2 oplock, but don't tell the client */
 734                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 735         }
 736
 737         if (!delay_it) {
 738                 return False;
 739         }
 740
 741         /*
 742          * Send a break message to the oplock holder and delay the open for
 743          * our client.
 744          */
 745
 746         DEBUG(10, ("Sending break request to PID %s\n",
 747                    procid_str_static(&exclusive->pid)));
 748         exclusive->op_mid = mid;
 749
 750         /* Create the message. */
 751         share_mode_entry_to_message(msg, exclusive);
 752
 753         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 754            don't want this set in the share mode struct pointed to by lck. */
 755
 756         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 757                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 758         }
 759
 760         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 761                                     MSG_SMB_BREAK_REQUEST,
 762                                     (uint8 *)msg,
 763                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 764         if (!NT_STATUS_IS_OK(status)) {
 765                 DEBUG(3, ("Could not send oplock break message: %s\n",
 766                           nt_errstr(status)));
 767         }
 768
 769         return True;
 770 }
 771
 772 static bool request_timed_out(struct timeval request_time,
 773                               struct timeval timeout)
 774 {
 775         struct timeval now, end_time;
 776         GetTimeOfDay(&now);
 777         end_time = timeval_sum(&request_time, &timeout);
 778         return (timeval_compare(&end_time, &now) < 0);
 779 }
 780
 781 /****************************************************************************
 782  Handle the 1 second delay in returning a SHARING_VIOLATION error.
 783 ****************************************************************************/
 784
 785 static void defer_open(struct share_mode_lock *lck,
 786                        struct timeval request_time,
 787                        struct timeval timeout,
 788                        struct smb_request *req,
 789                        struct deferred_open_record *state)
 790 {
 791         int i;
 792
 793         /* Paranoia check */
 794
 795         for (i=0; i<lck->num_share_modes; i++) {
 796                 struct share_mode_entry *e = &lck->share_modes[i];
 797
 798                 if (!is_deferred_open_entry(e)) {
 799                         continue;
 800                 }
 801
 802                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
 803                         DEBUG(0, ("Trying to defer an already deferred "
 804                                   "request: mid=%d, exiting\n", req->mid));
 805                         exit_server("attempt to defer a deferred request");
 806                 }
 807         }
 808
 809         /* End paranoia check */
 810
 811         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
 812                   "open entry for mid %u\n",
 813                   (unsigned int)request_time.tv_sec,
 814                   (unsigned int)request_time.tv_usec,
 815                   (unsigned int)req->mid));
 816
 817         if (!push_deferred_smb_message(req, request_time, timeout,
 818                                        (char *)state, sizeof(*state))) {
 819                 exit_server("push_deferred_smb_message failed");
 820         }
 821         add_deferred_open(lck, req->mid, request_time, state->id);
 822
 823         /*
 824          * Push the MID of this packet on the signing queue.
 825          * We only do this once, the first time we push the packet
 826          * onto the deferred open queue, as this has a side effect
 827          * of incrementing the response sequence number.
 828          */
 829
 830         srv_defer_sign_response(req->mid);
 831 }
 832
 833
 834 /****************************************************************************
 835  On overwrite open ensure that the attributes match.
 836 ****************************************************************************/
 837
 838 static bool open_match_attributes(connection_struct *conn,
 839                                   const char *path,
 840                                   uint32 old_dos_attr,
 841                                   uint32 new_dos_attr,
 842                                   mode_t existing_unx_mode,
 843                                   mode_t new_unx_mode,
 844                                   mode_t *returned_unx_mode)
 845 {
 846         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
 847
 848         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 849         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 850
 851         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
 852            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
 853                 *returned_unx_mode = new_unx_mode;
 854         } else {
 855                 *returned_unx_mode = (mode_t)0;
 856         }
 857
 858         DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
 859                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
 860                   "returned_unx_mode = 0%o\n",
 861                   path,
 862                   (unsigned int)old_dos_attr,
 863                   (unsigned int)existing_unx_mode,
 864                   (unsigned int)new_dos_attr,
 865                   (unsigned int)*returned_unx_mode ));
 866
 867         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 868         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 869                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
 870                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
 871                         return False;
 872                 }
 873         }
 874         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 875                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
 876                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
 877                         return False;
 878                 }
 879         }
 880         return True;
 881 }
 882
 883 /****************************************************************************
 884  Special FCB or DOS processing in the case of a sharing violation.
 885  Try and find a duplicated file handle.
 886 ****************************************************************************/
 887
 888 static files_struct *fcb_or_dos_open(connection_struct *conn,
 889                                      const char *fname,
 890                                      struct file_id id,
 891                                      uint16 file_pid,
 892                                      uint16 vuid,
 893                                      uint32 access_mask,
 894                                      uint32 share_access,
 895                                      uint32 create_options)
 896 {
 897         files_struct *fsp;
 898         files_struct *dup_fsp;
 899
 900         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 901                  "file %s.\n", fname ));
 902
 903         for(fsp = file_find_di_first(id); fsp;
 904             fsp = file_find_di_next(fsp)) {
 905
 906                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 907                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 908                           "access_mask = 0x%x\n", fsp->fsp_name,
 909                           fsp->fh->fd, (unsigned int)fsp->vuid,
 910                           (unsigned int)fsp->file_pid,
 911                           (unsigned int)fsp->fh->private_options,
 912                           (unsigned int)fsp->access_mask ));
 913
 914                 if (fsp->fh->fd != -1 &&
 915                     fsp->vuid == vuid &&
 916                     fsp->file_pid == file_pid &&
 917                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 918                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 919                     (fsp->access_mask & FILE_WRITE_DATA) &&
 920                     strequal(fsp->fsp_name, fname)) {
 921                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 922                         break;
 923                 }
 924         }
 925
 926         if (!fsp) {
 927                 return NULL;
 928         }
 929
 930         /* quite an insane set of semantics ... */
 931         if (is_executable(fname) &&
 932             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 933                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 934                 return NULL;
 935         }
 936
 937         /* We need to duplicate this fsp. */
 938         if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
 939                                           create_options, &dup_fsp))) {
 940                 return NULL;
 941         }
 942
 943         return dup_fsp;
 944 }
 945
 946 /****************************************************************************
 947  Open a file with a share mode - old openX method - map into NTCreate.
 948 ****************************************************************************/
 949
 950 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 951                                  uint32 *paccess_mask,
 952                                  uint32 *pshare_mode,
 953                                  uint32 *pcreate_disposition,
 954                                  uint32 *pcreate_options)
 955 {
 956         uint32 access_mask;
 957         uint32 share_mode;
 958         uint32 create_disposition;
 959         uint32 create_options = 0;
 960
 961         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 962                   "open_func = 0x%x\n",
 963                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 964
 965         /* Create the NT compatible access_mask. */
 966         switch (GET_OPENX_MODE(deny_mode)) {
 967                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 968                 case DOS_OPEN_RDONLY:
 969                         access_mask = FILE_GENERIC_READ;
 970                         break;
 971                 case DOS_OPEN_WRONLY:
 972                         access_mask = FILE_GENERIC_WRITE;
 973                         break;
 974                 case DOS_OPEN_RDWR:
 975                 case DOS_OPEN_FCB:
 976                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 977                         break;
 978                 default:
 979                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 980                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 981                         return False;
 982         }
 983
 984         /* Create the NT compatible create_disposition. */
 985         switch (open_func) {
 986                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 987                         create_disposition = FILE_CREATE;
 988                         break;
 989
 990                 case OPENX_FILE_EXISTS_OPEN:
 991                         create_disposition = FILE_OPEN;
 992                         break;
 993
 994                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
 995                         create_disposition = FILE_OPEN_IF;
 996                         break;
 997
 998                 case OPENX_FILE_EXISTS_TRUNCATE:
 999                         create_disposition = FILE_OVERWRITE;
1000                         break;
1001
1002                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1003                         create_disposition = FILE_OVERWRITE_IF;
1004                         break;
1005
1006                 default:
1007                         /* From samba4 - to be confirmed. */
1008                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1009                                 create_disposition = FILE_CREATE;
1010                                 break;
1011                         }
1012                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1013                                   "open_func 0x%x\n", (unsigned int)open_func));
1014                         return False;
1015         }
1016
1017         /* Create the NT compatible share modes. */
1018         switch (GET_DENY_MODE(deny_mode)) {
1019                 case DENY_ALL:
1020                         share_mode = FILE_SHARE_NONE;
1021                         break;
1022
1023                 case DENY_WRITE:
1024                         share_mode = FILE_SHARE_READ;
1025                         break;
1026
1027                 case DENY_READ:
1028                         share_mode = FILE_SHARE_WRITE;
1029                         break;
1030
1031                 case DENY_NONE:
1032                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1033                         break;
1034
1035                 case DENY_DOS:
1036                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1037                         if (is_executable(fname)) {
1038                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039                         } else {
1040                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1041                                         share_mode = FILE_SHARE_READ;
1042                                 } else {
1043                                         share_mode = FILE_SHARE_NONE;
1044                                 }
1045                         }
1046                         break;
1047
1048                 case DENY_FCB:
1049                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1050                         share_mode = FILE_SHARE_NONE;
1051                         break;
1052
1053                 default:
1054                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1055                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1056                         return False;
1057         }
1058
1059         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1060                   "share_mode = 0x%x, create_disposition = 0x%x, "
1061                   "create_options = 0x%x\n",
1062                   fname,
1063                   (unsigned int)access_mask,
1064                   (unsigned int)share_mode,
1065                   (unsigned int)create_disposition,
1066                   (unsigned int)create_options ));
1067
1068         if (paccess_mask) {
1069                 *paccess_mask = access_mask;
1070         }
1071         if (pshare_mode) {
1072                 *pshare_mode = share_mode;
1073         }
1074         if (pcreate_disposition) {
1075                 *pcreate_disposition = create_disposition;
1076         }
1077         if (pcreate_options) {
1078                 *pcreate_options = create_options;
1079         }
1080
1081         return True;
1082
1083 }
1084
1085 static void schedule_defer_open(struct share_mode_lock *lck,
1086                                 struct timeval request_time,
1087                                 struct smb_request *req)
1088 {
1089         struct deferred_open_record state;
1090
1091         /* This is a relative time, added to the absolute
1092            request_time value to get the absolute timeout time.
1093            Note that if this is the second or greater time we enter
1094            this codepath for this particular request mid then
1095            request_time is left as the absolute time of the *first*
1096            time this request mid was processed. This is what allows
1097            the request to eventually time out. */
1098
1099         struct timeval timeout;
1100
1101         /* Normally the smbd we asked should respond within
1102          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1103          * the client did, give twice the timeout as a safety
1104          * measure here in case the other smbd is stuck
1105          * somewhere else. */
1106
1107         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1108
1109         /* Nothing actually uses state.delayed_for_oplocks
1110            but it's handy to differentiate in debug messages
1111            between a 30 second delay due to oplock break, and
1112            a 1 second delay for share mode conflicts. */
1113
1114         state.delayed_for_oplocks = True;
1115         state.id = lck->id;
1116
1117         if (!request_timed_out(request_time, timeout)) {
1118                 defer_open(lck, request_time, timeout, req, &state);
1119         }
1120 }
1121
1122 /****************************************************************************
1123  Open a file with a share mode.
1124 ****************************************************************************/
1125
1126 NTSTATUS open_file_ntcreate(connection_struct *conn,
1127                             struct smb_request *req,
1128                             const char *fname,
1129                             SMB_STRUCT_STAT *psbuf,
1130                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1131                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1132                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1133                             uint32 create_options,      /* options such as delete on close. */
1134                             uint32 new_dos_attributes,  /* attributes used for new file. */
1135                             int oplock_request,         /* internal Samba oplock codes. */
1136                                                         /* Information (FILE_EXISTS etc.) */
1137                             int *pinfo,
1138                             files_struct **result)
1139 {
1140         int flags=0;
1141         int flags2=0;
1142         bool file_existed = VALID_STAT(*psbuf);
1143         bool def_acl = False;
1144         bool posix_open = False;
1145         bool new_file_created = False;
1146         struct file_id id;
1147         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1148         files_struct *fsp = NULL;
1149         mode_t new_unx_mode = (mode_t)0;
1150         mode_t unx_mode = (mode_t)0;
1151         int info;
1152         uint32 existing_dos_attributes = 0;
1153         struct pending_message_list *pml = NULL;
1154         struct timeval request_time = timeval_zero();
1155         struct share_mode_lock *lck = NULL;
1156         uint32 open_access_mask = access_mask;
1157         NTSTATUS status;
1158         int ret_flock;
1159         char *parent_dir;
1160         const char *newname;
1161
1162         ZERO_STRUCT(id);
1163
1164         if (conn->printer) {
1165                 /*
1166                  * Printers are handled completely differently.
1167                  * Most of the passed parameters are ignored.
1168                  */
1169
1170                 if (pinfo) {
1171                         *pinfo = FILE_WAS_CREATED;
1172                 }
1173
1174                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1175
1176                 return print_fsp_open(conn, fname, result);
1177         }
1178
1179         if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1180                                    &newname)) {
1181                 return NT_STATUS_NO_MEMORY;
1182         }
1183
1184         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1185                 posix_open = True;
1186                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1187                 new_dos_attributes = 0;
1188         } else {
1189                 /* We add aARCH to this as this mode is only used if the file is
1190                  * created new. */
1191                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1192                                      parent_dir);
1193         }
1194
1195         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1196                    "access_mask=0x%x share_access=0x%x "
1197                    "create_disposition = 0x%x create_options=0x%x "
1198                    "unix mode=0%o oplock_request=%d\n",
1199                    fname, new_dos_attributes, access_mask, share_access,
1200                    create_disposition, create_options, unx_mode,
1201                    oplock_request));
1202
1203         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1204                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1205                 return NT_STATUS_INTERNAL_ERROR;
1206         }
1207
1208         /*
1209          * Only non-internal opens can be deferred at all
1210          */
1211
1212         if ((req != NULL)
1213             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1214                 struct deferred_open_record *state =
1215                         (struct deferred_open_record *)pml->private_data.data;
1216
1217                 /* Remember the absolute time of the original
1218                    request with this mid. We'll use it later to
1219                    see if this has timed out. */
1220
1221                 request_time = pml->request_time;
1222
1223                 /* Remove the deferred open entry under lock. */
1224                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL);
1225                 if (lck == NULL) {
1226                         DEBUG(0, ("could not get share mode lock\n"));
1227                 } else {
1228                         del_deferred_open_entry(lck, req->mid);
1229                         TALLOC_FREE(lck);
1230                 }
1231
1232                 /* Ensure we don't reprocess this message. */
1233                 remove_deferred_open_smb_message(req->mid);
1234         }
1235
1236         status = check_name(conn, fname);
1237         if (!NT_STATUS_IS_OK(status)) {
1238                 return status;
1239         }
1240
1241         if (!posix_open) {
1242                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1243                 if (file_existed) {
1244                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1245                 }
1246         }
1247
1248         /* ignore any oplock requests if oplocks are disabled */
1249         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1250             IS_VETO_OPLOCK_PATH(conn, fname)) {
1251                 /* Mask off everything except the private Samba bits. */
1252                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1253         }
1254
1255         /* this is for OS/2 long file names - say we don't support them */
1256         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1257                 /* OS/2 Workplace shell fix may be main code stream in a later
1258                  * release. */
1259                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1260                          "supported.\n"));
1261                 if (use_nt_status()) {
1262                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1263                 }
1264                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1265         }
1266
1267         switch( create_disposition ) {
1268                 /*
1269                  * Currently we're using FILE_SUPERSEDE as the same as
1270                  * FILE_OVERWRITE_IF but they really are
1271                  * different. FILE_SUPERSEDE deletes an existing file
1272                  * (requiring delete access) then recreates it.
1273                  */
1274                 case FILE_SUPERSEDE:
1275                         /* If file exists replace/overwrite. If file doesn't
1276                          * exist create. */
1277                         flags2 |= (O_CREAT | O_TRUNC);
1278                         break;
1279
1280                 case FILE_OVERWRITE_IF:
1281                         /* If file exists replace/overwrite. If file doesn't
1282                          * exist create. */
1283                         flags2 |= (O_CREAT | O_TRUNC);
1284                         break;
1285
1286                 case FILE_OPEN:
1287                         /* If file exists open. If file doesn't exist error. */
1288                         if (!file_existed) {
1289                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1290                                          "requested for file %s and file "
1291                                          "doesn't exist.\n", fname ));
1292                                 errno = ENOENT;
1293                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1294                         }
1295                         break;
1296
1297                 case FILE_OVERWRITE:
1298                         /* If file exists overwrite. If file doesn't exist
1299                          * error. */
1300                         if (!file_existed) {
1301                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1302                                          "requested for file %s and file "
1303                                          "doesn't exist.\n", fname ));
1304                                 errno = ENOENT;
1305                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1306                         }
1307                         flags2 |= O_TRUNC;
1308                         break;
1309
1310                 case FILE_CREATE:
1311                         /* If file exists error. If file doesn't exist
1312                          * create. */
1313                         if (file_existed) {
1314                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1315                                          "requested for file %s and file "
1316                                          "already exists.\n", fname ));
1317                                 if (S_ISDIR(psbuf->st_mode)) {
1318                                         errno = EISDIR;
1319                                 } else {
1320                                         errno = EEXIST;
1321                                 }
1322                                 return map_nt_error_from_unix(errno);
1323                         }
1324                         flags2 |= (O_CREAT|O_EXCL);
1325                         break;
1326
1327                 case FILE_OPEN_IF:
1328                         /* If file exists open. If file doesn't exist
1329                          * create. */
1330                         flags2 |= O_CREAT;
1331                         break;
1332
1333                 default:
1334                         return NT_STATUS_INVALID_PARAMETER;
1335         }
1336
1337         /* We only care about matching attributes on file exists and
1338          * overwrite. */
1339
1340         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1341                              (create_disposition == FILE_OVERWRITE_IF))) {
1342                 if (!open_match_attributes(conn, fname,
1343                                            existing_dos_attributes,
1344                                            new_dos_attributes, psbuf->st_mode,
1345                                            unx_mode, &new_unx_mode)) {
1346                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1347                                  "for file %s (%x %x) (0%o, 0%o)\n",
1348                                  fname, existing_dos_attributes,
1349                                  new_dos_attributes,
1350                                  (unsigned int)psbuf->st_mode,
1351                                  (unsigned int)unx_mode ));
1352                         errno = EACCES;
1353                         return NT_STATUS_ACCESS_DENIED;
1354                 }
1355         }
1356
1357         /* This is a nasty hack - must fix... JRA. */
1358         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1359                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1360         }
1361
1362         /*
1363          * Convert GENERIC bits to specific bits.
1364          */
1365
1366         se_map_generic(&access_mask, &file_generic_mapping);
1367         open_access_mask = access_mask;
1368
1369         if (flags2 & O_TRUNC) {
1370                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1371         }
1372
1373         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1374                    "access_mask=0x%x\n", fname, access_mask ));
1375
1376         /*
1377          * Note that we ignore the append flag as append does not
1378          * mean the same thing under DOS and Unix.
1379          */
1380
1381         if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1382                 /* DENY_DOS opens are always underlying read-write on the
1383                    file handle, no matter what the requested access mask
1384                     says. */
1385                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1386                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1387                         flags = O_RDWR;
1388                 } else {
1389                         flags = O_WRONLY;
1390                 }
1391         } else {
1392                 flags = O_RDONLY;
1393         }
1394
1395         /*
1396          * Currently we only look at FILE_WRITE_THROUGH for create options.
1397          */
1398
1399 #if defined(O_SYNC)
1400         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1401                 flags2 |= O_SYNC;
1402         }
1403 #endif /* O_SYNC */
1404
1405         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1406                 flags2 |= O_APPEND;
1407         }
1408
1409         if (!posix_open && !CAN_WRITE(conn)) {
1410                 /*
1411                  * We should really return a permission denied error if either
1412                  * O_CREAT or O_TRUNC are set, but for compatibility with
1413                  * older versions of Samba we just AND them out.
1414                  */
1415                 flags2 &= ~(O_CREAT|O_TRUNC);
1416         }
1417
1418         /*
1419          * Ensure we can't write on a read-only share or file.
1420          */
1421
1422         if (flags != O_RDONLY && file_existed &&
1423             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1424                 DEBUG(5,("open_file_ntcreate: write access requested for "
1425                          "file %s on read only %s\n",
1426                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1427                 errno = EACCES;
1428                 return NT_STATUS_ACCESS_DENIED;
1429         }
1430
1431         status = file_new(conn, &fsp);
1432         if(!NT_STATUS_IS_OK(status)) {
1433                 return status;
1434         }
1435
1436         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1437         fsp->share_access = share_access;
1438         fsp->fh->private_options = create_options;
1439         fsp->access_mask = open_access_mask; /* We change this to the
1440                                               * requested access_mask after
1441                                               * the open is done. */
1442         fsp->posix_open = posix_open;
1443
1444         /* Ensure no SAMBA_PRIVATE bits can be set. */
1445         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1446
1447         if (timeval_is_zero(&request_time)) {
1448                 request_time = fsp->open_time;
1449         }
1450
1451         if (file_existed) {
1452                 id = vfs_file_id_from_sbuf(conn, psbuf);
1453
1454                 lck = get_share_mode_lock(talloc_tos(), id,
1455                                           conn->connectpath,
1456                                           fname);
1457
1458                 if (lck == NULL) {
1459                         file_free(fsp);
1460                         DEBUG(0, ("Could not get share mode lock\n"));
1461                         return NT_STATUS_SHARING_VIOLATION;
1462                 }
1463
1464                 /* First pass - send break only on batch oplocks. */
1465                 if ((req != NULL)
1466                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1467                                          oplock_request)) {
1468                         schedule_defer_open(lck, request_time, req);
1469                         TALLOC_FREE(lck);
1470                         file_free(fsp);
1471                         return NT_STATUS_SHARING_VIOLATION;
1472                 }
1473
1474                 /* Use the client requested access mask here, not the one we
1475                  * open with. */
1476                 status = open_mode_check(conn, fname, lck,
1477                                          access_mask, share_access,
1478                                          create_options, &file_existed);
1479
1480                 if (NT_STATUS_IS_OK(status)) {
1481                         /* We might be going to allow this open. Check oplock
1482                          * status again. */
1483                         /* Second pass - send break for both batch or
1484                          * exclusive oplocks. */
1485                         if ((req != NULL)
1486                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1487                                                   oplock_request)) {
1488                                 schedule_defer_open(lck, request_time, req);
1489                                 TALLOC_FREE(lck);
1490                                 file_free(fsp);
1491                                 return NT_STATUS_SHARING_VIOLATION;
1492                         }
1493                 }
1494
1495                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1496                         /* DELETE_PENDING is not deferred for a second */
1497                         TALLOC_FREE(lck);
1498                         file_free(fsp);
1499                         return status;
1500                 }
1501
1502                 if (!NT_STATUS_IS_OK(status)) {
1503                         uint32 can_access_mask;
1504                         bool can_access = True;
1505
1506                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1507
1508                         /* Check if this can be done with the deny_dos and fcb
1509                          * calls. */
1510                         if (create_options &
1511                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1512                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1513                                 files_struct *fsp_dup;
1514
1515                                 if (req == NULL) {
1516                                         DEBUG(0, ("DOS open without an SMB "
1517                                                   "request!\n"));
1518                                         TALLOC_FREE(lck);
1519                                         file_free(fsp);
1520                                         return NT_STATUS_INTERNAL_ERROR;
1521                                 }
1522
1523                                 /* Use the client requested access mask here,
1524                                  * not the one we open with. */
1525                                 fsp_dup = fcb_or_dos_open(conn, fname, id,
1526                                                           req->smbpid,
1527                                                           req->vuid,
1528                                                           access_mask,
1529                                                           share_access,
1530                                                           create_options);
1531
1532                                 if (fsp_dup) {
1533                                         TALLOC_FREE(lck);
1534                                         file_free(fsp);
1535                                         if (pinfo) {
1536                                                 *pinfo = FILE_WAS_OPENED;
1537                                         }
1538                                         conn->num_files_open++;
1539                                         *result = fsp_dup;
1540                                         return NT_STATUS_OK;
1541                                 }
1542                         }
1543
1544                         /*
1545                          * This next line is a subtlety we need for
1546                          * MS-Access. If a file open will fail due to share
1547                          * permissions and also for security (access) reasons,
1548                          * we need to return the access failed error, not the
1549                          * share error. We can't open the file due to kernel
1550                          * oplock deadlock (it's possible we failed above on
1551                          * the open_mode_check()) so use a userspace check.
1552                          */
1553
1554                         if (flags & O_RDWR) {
1555                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1556                         } else if (flags & O_WRONLY) {
1557                                 can_access_mask = FILE_WRITE_DATA;
1558                         } else {
1559                                 can_access_mask = FILE_READ_DATA;
1560                         }
1561
1562                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1563                             !can_access_file(conn,fname,psbuf,can_access_mask)) {
1564                                 can_access = False;
1565                         }
1566
1567                         /*
1568                          * If we're returning a share violation, ensure we
1569                          * cope with the braindead 1 second delay.
1570                          */
1571
1572                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1573                             lp_defer_sharing_violations()) {
1574                                 struct timeval timeout;
1575                                 struct deferred_open_record state;
1576                                 int timeout_usecs;
1577
1578                                 /* this is a hack to speed up torture tests
1579                                    in 'make test' */
1580                                 timeout_usecs = lp_parm_int(SNUM(conn),
1581                                                             "smbd","sharedelay",
1582                                                             SHARING_VIOLATION_USEC_WAIT);
1583
1584                                 /* This is a relative time, added to the absolute
1585                                    request_time value to get the absolute timeout time.
1586                                    Note that if this is the second or greater time we enter
1587                                    this codepath for this particular request mid then
1588                                    request_time is left as the absolute time of the *first*
1589                                    time this request mid was processed. This is what allows
1590                                    the request to eventually time out. */
1591
1592                                 timeout = timeval_set(0, timeout_usecs);
1593
1594                                 /* Nothing actually uses state.delayed_for_oplocks
1595                                    but it's handy to differentiate in debug messages
1596                                    between a 30 second delay due to oplock break, and
1597                                    a 1 second delay for share mode conflicts. */
1598
1599                                 state.delayed_for_oplocks = False;
1600                                 state.id = id;
1601
1602                                 if ((req != NULL)
1603                                     && !request_timed_out(request_time,
1604                                                           timeout)) {
1605                                         defer_open(lck, request_time, timeout,
1606                                                    req, &state);
1607                                 }
1608                         }
1609
1610                         TALLOC_FREE(lck);
1611                         if (can_access) {
1612                                 /*
1613                                  * We have detected a sharing violation here
1614                                  * so return the correct error code
1615                                  */
1616                                 status = NT_STATUS_SHARING_VIOLATION;
1617                         } else {
1618                                 status = NT_STATUS_ACCESS_DENIED;
1619                         }
1620                         file_free(fsp);
1621                         return status;
1622                 }
1623
1624                 /*
1625                  * We exit this block with the share entry *locked*.....
1626                  */
1627         }
1628
1629         SMB_ASSERT(!file_existed || (lck != NULL));
1630
1631         /*
1632          * Ensure we pay attention to default ACLs on directories if required.
1633          */
1634
1635         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1636             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1637                 unx_mode = 0777;
1638         }
1639
1640         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1641                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1642                  (unsigned int)flags, (unsigned int)flags2,
1643                  (unsigned int)unx_mode, (unsigned int)access_mask,
1644                  (unsigned int)open_access_mask));
1645
1646         /*
1647          * open_file strips any O_TRUNC flags itself.
1648          */
1649
1650         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1651                              flags|flags2, unx_mode, access_mask,
1652                              open_access_mask);
1653
1654         if (!NT_STATUS_IS_OK(fsp_open)) {
1655                 if (lck != NULL) {
1656                         TALLOC_FREE(lck);
1657                 }
1658                 file_free(fsp);
1659                 return fsp_open;
1660         }
1661
1662         if (!file_existed) {
1663
1664                 /*
1665                  * Deal with the race condition where two smbd's detect the
1666                  * file doesn't exist and do the create at the same time. One
1667                  * of them will win and set a share mode, the other (ie. this
1668                  * one) should check if the requested share mode for this
1669                  * create is allowed.
1670                  */
1671
1672                 /*
1673                  * Now the file exists and fsp is successfully opened,
1674                  * fsp->dev and fsp->inode are valid and should replace the
1675                  * dev=0,inode=0 from a non existent file. Spotted by
1676                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1677                  */
1678
1679                 id = fsp->file_id;
1680
1681                 lck = get_share_mode_lock(talloc_tos(), id,
1682                                           conn->connectpath,
1683                                           fname);
1684
1685                 if (lck == NULL) {
1686                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1687                                   "mode lock for %s\n", fname));
1688                         fd_close(fsp);
1689                         file_free(fsp);
1690                         return NT_STATUS_SHARING_VIOLATION;
1691                 }
1692
1693                 /* First pass - send break only on batch oplocks. */
1694                 if ((req != NULL)
1695                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1696                                          oplock_request)) {
1697                         schedule_defer_open(lck, request_time, req);
1698                         TALLOC_FREE(lck);
1699                         fd_close(fsp);
1700                         file_free(fsp);
1701                         return NT_STATUS_SHARING_VIOLATION;
1702                 }
1703
1704                 status = open_mode_check(conn, fname, lck,
1705                                          access_mask, share_access,
1706                                          create_options, &file_existed);
1707
1708                 if (NT_STATUS_IS_OK(status)) {
1709                         /* We might be going to allow this open. Check oplock
1710                          * status again. */
1711                         /* Second pass - send break for both batch or
1712                          * exclusive oplocks. */
1713                         if ((req != NULL)
1714                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1715                                                  oplock_request)) {
1716                                 schedule_defer_open(lck, request_time, req);
1717                                 TALLOC_FREE(lck);
1718                                 fd_close(fsp);
1719                                 file_free(fsp);
1720                                 return NT_STATUS_SHARING_VIOLATION;
1721                         }
1722                 }
1723
1724                 if (!NT_STATUS_IS_OK(status)) {
1725                         struct deferred_open_record state;
1726
1727                         fd_close(fsp);
1728                         file_free(fsp);
1729
1730                         state.delayed_for_oplocks = False;
1731                         state.id = id;
1732
1733                         /* Do it all over again immediately. In the second
1734                          * round we will find that the file existed and handle
1735                          * the DELETE_PENDING and FCB cases correctly. No need
1736                          * to duplicate the code here. Essentially this is a
1737                          * "goto top of this function", but don't tell
1738                          * anybody... */
1739
1740                         if (req != NULL) {
1741                                 defer_open(lck, request_time, timeval_zero(),
1742                                            req, &state);
1743                         }
1744                         TALLOC_FREE(lck);
1745                         return status;
1746                 }
1747
1748                 /*
1749                  * We exit this block with the share entry *locked*.....
1750                  */
1751
1752         }
1753
1754         SMB_ASSERT(lck != NULL);
1755
1756         /* note that we ignore failure for the following. It is
1757            basically a hack for NFS, and NFS will never set one of
1758            these only read them. Nobody but Samba can ever set a deny
1759            mode and we have already checked our more authoritative
1760            locking database for permission to set this deny mode. If
1761            the kernel refuses the operations then the kernel is wrong.
1762            note that GPFS supports it as well - jmcd */
1763
1764         if (fsp->fh->fd != -1) {
1765                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1766                 if(ret_flock == -1 ){
1767
1768                         TALLOC_FREE(lck);
1769                         fd_close(fsp);
1770                         file_free(fsp);
1771
1772                         return NT_STATUS_SHARING_VIOLATION;
1773                 }
1774         }
1775
1776         /*
1777          * At this point onwards, we can guarentee that the share entry
1778          * is locked, whether we created the file or not, and that the
1779          * deny mode is compatible with all current opens.
1780          */
1781
1782         /*
1783          * If requested, truncate the file.
1784          */
1785
1786         if (flags2&O_TRUNC) {
1787                 /*
1788                  * We are modifing the file after open - update the stat
1789                  * struct..
1790                  */
1791                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1792                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1793                         status = map_nt_error_from_unix(errno);
1794                         TALLOC_FREE(lck);
1795                         fd_close(fsp);
1796                         file_free(fsp);
1797                         return status;
1798                 }
1799         }
1800
1801         /* Record the options we were opened with. */
1802         fsp->share_access = share_access;
1803         fsp->fh->private_options = create_options;
1804         fsp->access_mask = access_mask;
1805
1806         if (file_existed) {
1807                 /* stat opens on existing files don't get oplocks. */
1808                 if (is_stat_open(open_access_mask)) {
1809                         fsp->oplock_type = NO_OPLOCK;
1810                 }
1811
1812                 if (!(flags2 & O_TRUNC)) {
1813                         info = FILE_WAS_OPENED;
1814                 } else {
1815                         info = FILE_WAS_OVERWRITTEN;
1816                 }
1817         } else {
1818                 info = FILE_WAS_CREATED;
1819         }
1820
1821         if (pinfo) {
1822                 *pinfo = info;
1823         }
1824
1825         /*
1826          * Setup the oplock info in both the shared memory and
1827          * file structs.
1828          */
1829
1830         if ((fsp->oplock_type != NO_OPLOCK) &&
1831             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1832                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1833                         /* Could not get the kernel oplock */
1834                         fsp->oplock_type = NO_OPLOCK;
1835                 }
1836         }
1837
1838         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1839                 new_file_created = True;
1840         }
1841
1842         set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type, new_file_created);
1843
1844         /* Handle strange delete on close create semantics. */
1845         if ((create_options & FILE_DELETE_ON_CLOSE) && can_set_initial_delete_on_close(lck)) {
1846                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1847
1848                 if (!NT_STATUS_IS_OK(status)) {
1849                         /* Remember to delete the mode we just added. */
1850                         del_share_mode(lck, fsp);
1851                         TALLOC_FREE(lck);
1852                         fd_close(fsp);
1853                         file_free(fsp);
1854                         return status;
1855                 }
1856                 /* Note that here we set the *inital* delete on close flag,
1857                    not the regular one. The magic gets handled in close. */
1858                 fsp->initial_delete_on_close = True;
1859         }
1860
1861         if (new_file_created) {
1862                 /* Files should be initially set as archive */
1863                 if (lp_map_archive(SNUM(conn)) ||
1864                     lp_store_dos_attributes(SNUM(conn))) {
1865                         if (!posix_open) {
1866                                 SMB_STRUCT_STAT tmp_sbuf;
1867                                 SET_STAT_INVALID(tmp_sbuf);
1868                                 if (file_set_dosmode(
1869                                             conn, fname,
1870                                             new_dos_attributes | aARCH,
1871                                             &tmp_sbuf, parent_dir,
1872                                             true) == 0) {
1873                                         unx_mode = tmp_sbuf.st_mode;
1874                                 }
1875                         }
1876                 }
1877         }
1878
1879         /*
1880          * Take care of inherited ACLs on created files - if default ACL not
1881          * selected.
1882          */
1883
1884         if (!posix_open && !file_existed && !def_acl) {
1885
1886                 int saved_errno = errno; /* We might get ENOSYS in the next
1887                                           * call.. */
1888
1889                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1890                     errno == ENOSYS) {
1891                         errno = saved_errno; /* Ignore ENOSYS */
1892                 }
1893
1894         } else if (new_unx_mode) {
1895
1896                 int ret = -1;
1897
1898                 /* Attributes need changing. File already existed. */
1899
1900                 {
1901                         int saved_errno = errno; /* We might get ENOSYS in the
1902                                                   * next call.. */
1903                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1904
1905                         if (ret == -1 && errno == ENOSYS) {
1906                                 errno = saved_errno; /* Ignore ENOSYS */
1907                         } else {
1908                                 DEBUG(5, ("open_file_ntcreate: reset "
1909                                           "attributes of file %s to 0%o\n",
1910                                           fname, (unsigned int)new_unx_mode));
1911                                 ret = 0; /* Don't do the fchmod below. */
1912                         }
1913                 }
1914
1915                 if ((ret == -1) &&
1916                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1917                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1918                                   "attributes of file %s to 0%o\n",
1919                                   fname, (unsigned int)new_unx_mode));
1920         }
1921
1922         /* If this is a successful open, we must remove any deferred open
1923          * records. */
1924         if (req != NULL) {
1925                 del_deferred_open_entry(lck, req->mid);
1926         }
1927         TALLOC_FREE(lck);
1928
1929         conn->num_files_open++;
1930
1931         *result = fsp;
1932         return NT_STATUS_OK;
1933 }
1934
1935 /****************************************************************************
1936  Open a file for for write to ensure that we can fchmod it.
1937 ****************************************************************************/
1938
1939 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1940                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1941 {
1942         files_struct *fsp = NULL;
1943         NTSTATUS status;
1944
1945         if (!VALID_STAT(*psbuf)) {
1946                 return NT_STATUS_INVALID_PARAMETER;
1947         }
1948
1949         status = file_new(conn, &fsp);
1950         if(!NT_STATUS_IS_OK(status)) {
1951                 return status;
1952         }
1953
1954         /* note! we must use a non-zero desired access or we don't get
1955            a real file descriptor. Oh what a twisted web we weave. */
1956         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1957                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1958
1959         /*
1960          * This is not a user visible file open.
1961          * Don't set a share mode and don't increment
1962          * the conn->num_files_open.
1963          */
1964
1965         if (!NT_STATUS_IS_OK(status)) {
1966                 file_free(fsp);
1967                 return status;
1968         }
1969
1970         *result = fsp;
1971         return NT_STATUS_OK;
1972 }
1973
1974 /****************************************************************************
1975  Close the fchmod file fd - ensure no locks are lost.
1976 ****************************************************************************/
1977
1978 NTSTATUS close_file_fchmod(files_struct *fsp)
1979 {
1980         NTSTATUS status = fd_close(fsp);
1981         file_free(fsp);
1982         return status;
1983 }
1984
1985 static NTSTATUS mkdir_internal(connection_struct *conn,
1986                                 const char *name,
1987                                 uint32 file_attributes,
1988                                 SMB_STRUCT_STAT *psbuf)
1989 {
1990         mode_t mode;
1991         char *parent_dir;
1992         const char *dirname;
1993         NTSTATUS status;
1994         bool posix_open = false;
1995
1996         if(!CAN_WRITE(conn)) {
1997                 DEBUG(5,("mkdir_internal: failing create on read-only share "
1998                          "%s\n", lp_servicename(SNUM(conn))));
1999                 return NT_STATUS_ACCESS_DENIED;
2000         }
2001
2002         status = check_name(conn, name);
2003         if (!NT_STATUS_IS_OK(status)) {
2004                 return status;
2005         }
2006
2007         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2008                                    &dirname)) {
2009                 return NT_STATUS_NO_MEMORY;
2010         }
2011
2012         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2013                 posix_open = true;
2014                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2015         } else {
2016                 mode = unix_mode(conn, aDIR, name, parent_dir);
2017         }
2018
2019         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2020                 return map_nt_error_from_unix(errno);
2021         }
2022
2023         /* Ensure we're checking for a symlink here.... */
2024         /* We don't want to get caught by a symlink racer. */
2025
2026         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2027                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2028                           name, strerror(errno)));
2029                 return map_nt_error_from_unix(errno);
2030         }
2031
2032         if (!S_ISDIR(psbuf->st_mode)) {
2033                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2034                           name));
2035                 return NT_STATUS_ACCESS_DENIED;
2036         }
2037
2038         if (lp_store_dos_attributes(SNUM(conn))) {
2039                 if (!posix_open) {
2040                         file_set_dosmode(conn, name,
2041                                  file_attributes | aDIR, NULL,
2042                                  parent_dir,
2043                                  true);
2044                 }
2045         }
2046
2047         if (lp_inherit_perms(SNUM(conn))) {
2048                 inherit_access_acl(conn, parent_dir, name, mode);
2049         }
2050
2051         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2052                 /*
2053                  * Check if high bits should have been set,
2054                  * then (if bits are missing): add them.
2055                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2056                  * dir.
2057                  */
2058                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2059                         SMB_VFS_CHMOD(conn, name,
2060                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2061                 }
2062         }
2063
2064         /* Change the owner if required. */
2065         if (lp_inherit_owner(SNUM(conn))) {
2066                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2067         }
2068
2069         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2070                      name);
2071
2072         return NT_STATUS_OK;
2073 }
2074
2075 /****************************************************************************
2076  Open a directory from an NT SMB call.
2077 ****************************************************************************/
2078
2079 NTSTATUS open_directory(connection_struct *conn,
2080                         struct smb_request *req,
2081                         const char *fname,
2082                         SMB_STRUCT_STAT *psbuf,
2083                         uint32 access_mask,
2084                         uint32 share_access,
2085                         uint32 create_disposition,
2086                         uint32 create_options,
2087                         uint32 file_attributes,
2088                         int *pinfo,
2089                         files_struct **result)
2090 {
2091         files_struct *fsp = NULL;
2092         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2093         struct share_mode_lock *lck = NULL;
2094         NTSTATUS status;
2095         int info = 0;
2096
2097         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2098                  "share_access = 0x%x create_options = 0x%x, "
2099                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2100                  fname,
2101                  (unsigned int)access_mask,
2102                  (unsigned int)share_access,
2103                  (unsigned int)create_options,
2104                  (unsigned int)create_disposition,
2105                  (unsigned int)file_attributes));
2106
2107         if (is_ntfs_stream_name(fname)) {
2108                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2109                 return NT_STATUS_NOT_A_DIRECTORY;
2110         }
2111
2112         switch( create_disposition ) {
2113                 case FILE_OPEN:
2114
2115                         info = FILE_WAS_OPENED;
2116
2117                         /*
2118                          * We want to follow symlinks here.
2119                          */
2120
2121                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2122                                 return map_nt_error_from_unix(errno);
2123                         }
2124
2125                         break;
2126
2127                 case FILE_CREATE:
2128
2129                         /* If directory exists error. If directory doesn't
2130                          * exist create. */
2131
2132                         status = mkdir_internal(conn,
2133                                                 fname,
2134                                                 file_attributes,
2135                                                 psbuf);
2136
2137                         if (!NT_STATUS_IS_OK(status)) {
2138                                 DEBUG(2, ("open_directory: unable to create "
2139                                           "%s. Error was %s\n", fname,
2140                                           nt_errstr(status)));
2141                                 return status;
2142                         }
2143
2144                         info = FILE_WAS_CREATED;
2145                         break;
2146
2147                 case FILE_OPEN_IF:
2148                         /*
2149                          * If directory exists open. If directory doesn't
2150                          * exist create.
2151                          */
2152
2153                         status = mkdir_internal(conn,
2154                                                 fname,
2155                                                 file_attributes,
2156                                                 psbuf);
2157
2158                         if (NT_STATUS_IS_OK(status)) {
2159                                 info = FILE_WAS_CREATED;
2160                         }
2161
2162                         if (NT_STATUS_EQUAL(status,
2163                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2164                                 info = FILE_WAS_OPENED;
2165                                 status = NT_STATUS_OK;
2166                         }
2167
2168                         break;
2169
2170                 case FILE_SUPERSEDE:
2171                 case FILE_OVERWRITE:
2172                 case FILE_OVERWRITE_IF:
2173                 default:
2174                         DEBUG(5,("open_directory: invalid create_disposition "
2175                                  "0x%x for directory %s\n",
2176                                  (unsigned int)create_disposition, fname));
2177                         return NT_STATUS_INVALID_PARAMETER;
2178         }
2179
2180         if(!S_ISDIR(psbuf->st_mode)) {
2181                 DEBUG(5,("open_directory: %s is not a directory !\n",
2182                          fname ));
2183                 return NT_STATUS_NOT_A_DIRECTORY;
2184         }
2185
2186         status = file_new(conn, &fsp);
2187         if(!NT_STATUS_IS_OK(status)) {
2188                 return status;
2189         }
2190
2191         /*
2192          * Setup the files_struct for it.
2193          */
2194
2195         fsp->mode = psbuf->st_mode;
2196         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2197         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2198         fsp->file_pid = req ? req->smbpid : 0;
2199         fsp->can_lock = False;
2200         fsp->can_read = False;
2201         fsp->can_write = False;
2202
2203         fsp->share_access = share_access;
2204         fsp->fh->private_options = create_options;
2205         fsp->access_mask = access_mask;
2206
2207         fsp->print_file = False;
2208         fsp->modified = False;
2209         fsp->oplock_type = NO_OPLOCK;
2210         fsp->sent_oplock_break = NO_BREAK_SENT;
2211         fsp->is_directory = True;
2212         fsp->is_stat = False;
2213         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2214
2215         string_set(&fsp->fsp_name,fname);
2216
2217         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2218                                   conn->connectpath,
2219                                   fname);
2220
2221         if (lck == NULL) {
2222                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2223                 file_free(fsp);
2224                 return NT_STATUS_SHARING_VIOLATION;
2225         }
2226
2227         status = open_mode_check(conn, fname, lck,
2228                                 access_mask, share_access,
2229                                 create_options, &dir_existed);
2230
2231         if (!NT_STATUS_IS_OK(status)) {
2232                 TALLOC_FREE(lck);
2233                 file_free(fsp);
2234                 return status;
2235         }
2236
2237         set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK, True);
2238
2239         /* For directories the delete on close bit at open time seems
2240            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2241         if (create_options & FILE_DELETE_ON_CLOSE) {
2242                 status = can_set_delete_on_close(fsp, True, 0);
2243                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2244                         TALLOC_FREE(lck);
2245                         file_free(fsp);
2246                         return status;
2247                 }
2248
2249                 if (NT_STATUS_IS_OK(status)) {
2250                         /* Note that here we set the *inital* delete on close flag,
2251                            not the regular one. The magic gets handled in close. */
2252                         fsp->initial_delete_on_close = True;
2253                 }
2254         }
2255
2256         TALLOC_FREE(lck);
2257
2258         if (pinfo) {
2259                 *pinfo = info;
2260         }
2261
2262         conn->num_files_open++;
2263
2264         *result = fsp;
2265         return NT_STATUS_OK;
2266 }
2267
2268 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2269 {
2270         NTSTATUS status;
2271         SMB_STRUCT_STAT sbuf;
2272         files_struct *fsp;
2273
2274         SET_STAT_INVALID(sbuf);
2275
2276         status = open_directory(conn, req, directory, &sbuf,
2277                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2278                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2279                                 FILE_CREATE,
2280                                 0,
2281                                 FILE_ATTRIBUTE_DIRECTORY,
2282                                 NULL,
2283                                 &fsp);
2284
2285         if (NT_STATUS_IS_OK(status)) {
2286                 close_file(fsp, NORMAL_CLOSE);
2287         }
2288
2289         return status;
2290 }
2291
2292 /****************************************************************************
2293  Open a pseudo-file (no locking checks - a 'stat' open).
2294 ****************************************************************************/
2295
2296 NTSTATUS open_file_stat(connection_struct *conn, struct smb_request *req,
2297                         const char *fname, SMB_STRUCT_STAT *psbuf,
2298                         files_struct **result)
2299 {
2300         files_struct *fsp = NULL;
2301         NTSTATUS status;
2302
2303         if (!VALID_STAT(*psbuf)) {
2304                 return NT_STATUS_INVALID_PARAMETER;
2305         }
2306
2307         /* Can't 'stat' open directories. */
2308         if(S_ISDIR(psbuf->st_mode)) {
2309                 return NT_STATUS_FILE_IS_A_DIRECTORY;
2310         }
2311
2312         status = file_new(conn, &fsp);
2313         if(!NT_STATUS_IS_OK(status)) {
2314                 return status;
2315         }
2316
2317         DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2318
2319         /*
2320          * Setup the files_struct for it.
2321          */
2322
2323         fsp->mode = psbuf->st_mode;
2324         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2325         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2326         fsp->file_pid = req ? req->smbpid : 0;
2327         fsp->can_lock = False;
2328         fsp->can_read = False;
2329         fsp->can_write = False;
2330         fsp->print_file = False;
2331         fsp->modified = False;
2332         fsp->oplock_type = NO_OPLOCK;
2333         fsp->sent_oplock_break = NO_BREAK_SENT;
2334         fsp->is_directory = False;
2335         fsp->is_stat = True;
2336         string_set(&fsp->fsp_name,fname);
2337
2338         conn->num_files_open++;
2339
2340         *result = fsp;
2341         return NT_STATUS_OK;
2342 }
2343
2344 /****************************************************************************
2345  Receive notification that one of our open files has been renamed by another
2346  smbd process.
2347 ****************************************************************************/
2348
2349 void msg_file_was_renamed(struct messaging_context *msg,
2350                           void *private_data,
2351                           uint32_t msg_type,
2352                           struct server_id server_id,
2353                           DATA_BLOB *data)
2354 {
2355         files_struct *fsp;
2356         char *frm = (char *)data->data;
2357         struct file_id id;
2358         const char *sharepath;
2359         const char *newname;
2360         size_t sp_len;
2361
2362         if (data->data == NULL
2363             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2364                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2365                           (int)data->length));
2366                 return;
2367         }
2368
2369         /* Unpack the message. */
2370         pull_file_id_16(frm, &id);
2371         sharepath = &frm[16];
2372         newname = sharepath + strlen(sharepath) + 1;
2373         sp_len = strlen(sharepath);
2374
2375         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2376                 "file_id %s\n",
2377                   sharepath, newname, file_id_string_tos(&id)));
2378
2379         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2380                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2381                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2382                                 fsp->fnum, fsp->fsp_name, newname ));
2383                         string_set(&fsp->fsp_name, newname);
2384                 } else {
2385                         /* TODO. JRA. */
2386                         /* Now we have the complete path we can work out if this is
2387                            actually within this share and adjust newname accordingly. */
2388                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2389                                 "not sharepath %s) "
2390                                 "fnum %d from %s -> %s\n",
2391                                 fsp->conn->connectpath,
2392                                 sharepath,
2393                                 fsp->fnum,
2394                                 fsp->fsp_name,
2395                                 newname ));
2396                 }
2397         }
2398 }
2399
2400 struct case_semantics_state {
2401         connection_struct *conn;
2402         bool case_sensitive;
2403         bool case_preserve;
2404         bool short_case_preserve;
2405 };
2406
2407 /****************************************************************************
2408  Restore case semantics.
2409 ****************************************************************************/
2410 static int restore_case_semantics(struct case_semantics_state *state)
2411 {
2412         state->conn->case_sensitive = state->case_sensitive;
2413         state->conn->case_preserve = state->case_preserve;
2414         state->conn->short_case_preserve = state->short_case_preserve;
2415         return 0;
2416 }
2417
2418 /****************************************************************************
2419  Save case semantics.
2420 ****************************************************************************/
2421 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2422                                                              connection_struct *conn)
2423 {
2424         struct case_semantics_state *result;
2425
2426         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2427                 DEBUG(0, ("talloc failed\n"));
2428                 return NULL;
2429         }
2430
2431         result->conn = conn;
2432         result->case_sensitive = conn->case_sensitive;
2433         result->case_preserve = conn->case_preserve;
2434         result->short_case_preserve = conn->short_case_preserve;
2435
2436         /* Set to POSIX. */
2437         conn->case_sensitive = True;
2438         conn->case_preserve = True;
2439         conn->short_case_preserve = True;
2440
2441         talloc_set_destructor(result, restore_case_semantics);
2442
2443         return result;
2444 }
2445
2446 /*
2447  * Wrapper around open_file_ntcreate and open_directory
2448  */
2449
2450 NTSTATUS create_file_unixpath(connection_struct *conn,
2451                               struct smb_request *req,
2452                               const char *fname,
2453                               uint32_t access_mask,
2454                               uint32_t share_access,
2455                               uint32_t create_disposition,
2456                               uint32_t create_options,
2457                               uint32_t file_attributes,
2458                               uint32_t oplock_request,
2459                               SMB_BIG_UINT allocation_size,
2460                               struct security_descriptor *sd,
2461                               struct ea_list *ea_list,
2462
2463                               files_struct **result,
2464                               int *pinfo,
2465                               SMB_STRUCT_STAT *psbuf)
2466 {
2467         SMB_STRUCT_STAT sbuf;
2468         int info = FILE_WAS_OPENED;
2469         files_struct *fsp = NULL;
2470         NTSTATUS status;
2471
2472         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2473                   "file_attributes = 0x%x, share_access = 0x%x, "
2474                   "create_disposition = 0x%x create_options = 0x%x "
2475                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2476                   "fname = %s\n",
2477                   (unsigned int)access_mask,
2478                   (unsigned int)file_attributes,
2479                   (unsigned int)share_access,
2480                   (unsigned int)create_disposition,
2481                   (unsigned int)create_options,
2482                   (unsigned int)oplock_request,
2483                   ea_list, sd, fname));
2484
2485         if (create_options & FILE_OPEN_BY_FILE_ID) {
2486                 status = NT_STATUS_NOT_SUPPORTED;
2487                 goto fail;
2488         }
2489
2490         if (req == NULL) {
2491                 oplock_request |= INTERNAL_OPEN_ONLY;
2492         }
2493
2494         if (psbuf != NULL) {
2495                 sbuf = *psbuf;
2496         }
2497         else {
2498                 SET_STAT_INVALID(sbuf);
2499         }
2500
2501         /* This is the correct thing to do (check every time) but can_delete
2502          * is expensive (it may have to read the parent directory
2503          * permissions). So for now we're not doing it unless we have a strong
2504          * hint the client is really going to delete this file. If the client
2505          * is forcing FILE_CREATE let the filesystem take care of the
2506          * permissions. */
2507
2508         /* Setting FILE_SHARE_DELETE is the hint. */
2509
2510         if (lp_acl_check_permissions(SNUM(conn))
2511             && (create_disposition != FILE_CREATE)
2512             && (share_access & FILE_SHARE_DELETE)
2513             && (access_mask & DELETE_ACCESS)
2514             && (((dos_mode(conn, fname, &sbuf) & FILE_ATTRIBUTE_READONLY)
2515                  && !lp_delete_readonly(SNUM(conn)))
2516                 || !can_delete_file_in_directory(conn, fname))) {
2517                 status = NT_STATUS_ACCESS_DENIED;
2518                 goto fail;
2519         }
2520
2521 #if 0
2522         /* We need to support SeSecurityPrivilege for this. */
2523         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2524             !user_has_privileges(current_user.nt_user_token,
2525                                  &se_security)) {
2526                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2527                 goto fail;
2528         }
2529 #endif
2530
2531         /*
2532          * If it's a request for a directory open, deal with it separately.
2533          */
2534
2535         if (create_options & FILE_DIRECTORY_FILE) {
2536
2537                 /* Can't open a temp directory. IFS kit test. */
2538                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2539                         status = NT_STATUS_INVALID_PARAMETER;
2540                         goto fail;
2541                 }
2542
2543                 /*
2544                  * We will get a create directory here if the Win32
2545                  * app specified a security descriptor in the
2546                  * CreateDirectory() call.
2547                  */
2548
2549                 oplock_request = 0;
2550                 status = open_directory(
2551                         conn, req, fname, &sbuf, access_mask, share_access,
2552                         create_disposition, create_options, file_attributes,
2553                         &info, &fsp);
2554         } else {
2555
2556                 /*
2557                  * Ordinary file case.
2558                  */
2559
2560                 status = open_file_ntcreate(
2561                         conn, req, fname, &sbuf, access_mask, share_access,
2562                         create_disposition, create_options, file_attributes,
2563                         oplock_request, &info, &fsp);
2564
2565                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2566
2567                         /*
2568                          * Fail the open if it was explicitly a non-directory
2569                          * file.
2570                          */
2571
2572                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2573                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2574                                 goto fail;
2575                         }
2576
2577                         oplock_request = 0;
2578                         status = open_directory(
2579                                 conn, req, fname, &sbuf, access_mask,
2580                                 share_access, create_disposition,
2581                                 create_options, file_attributes,
2582                                 &info, &fsp);
2583                 }
2584         }
2585
2586         if (!NT_STATUS_IS_OK(status)) {
2587                 goto fail;
2588         }
2589
2590         /*
2591          * According to the MS documentation, the only time the security
2592          * descriptor is applied to the opened file is iff we *created* the
2593          * file; an existing file stays the same.
2594          *
2595          * Also, it seems (from observation) that you can open the file with
2596          * any access mask but you can still write the sd. We need to override
2597          * the granted access before we call set_sd
2598          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2599          */
2600
2601         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2602             && lp_nt_acl_support(SNUM(conn))) {
2603
2604                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2605                 uint32_t saved_access_mask = fsp->access_mask;
2606
2607                 if (sd->owner_sid == NULL) {
2608                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2609                 }
2610                 if (sd->group_sid == NULL) {
2611                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2612                 }
2613                 if (sd->sacl == NULL) {
2614                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2615                 }
2616                 if (sd->dacl == NULL) {
2617                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2618                 }
2619
2620                 fsp->access_mask = FILE_GENERIC_ALL;
2621
2622                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2623
2624                 fsp->access_mask = saved_access_mask;
2625
2626                 if (!NT_STATUS_IS_OK(status)) {
2627                         goto fail;
2628                 }
2629         }
2630
2631         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2632                 status = set_ea(conn, fsp, fname, ea_list);
2633                 if (!NT_STATUS_IS_OK(status)) {
2634                         goto fail;
2635                 }
2636         }
2637
2638         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2639                 status = NT_STATUS_ACCESS_DENIED;
2640                 goto fail;
2641         }
2642
2643         /* Save the requested allocation size. */
2644         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2645                 if (allocation_size
2646                     && (allocation_size > sbuf.st_size)) {
2647                         fsp->initial_allocation_size = smb_roundup(
2648                                 fsp->conn, allocation_size);
2649                         if (fsp->is_directory) {
2650                                 /* Can't set allocation size on a directory. */
2651                                 status = NT_STATUS_ACCESS_DENIED;
2652                                 goto fail;
2653                         }
2654                         if (vfs_allocate_file_space(
2655                                     fsp, fsp->initial_allocation_size) == -1) {
2656                                 status = NT_STATUS_DISK_FULL;
2657                                 goto fail;
2658                         }
2659                 } else {
2660                         fsp->initial_allocation_size = smb_roundup(
2661                                 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2662                 }
2663         }
2664
2665         DEBUG(10, ("create_file: info=%d\n", info));
2666
2667         *result = fsp;
2668         if (pinfo != NULL) {
2669                 *pinfo = info;
2670         }
2671         if (psbuf != NULL) {
2672                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2673                         *psbuf = sbuf;
2674                 }
2675                 else {
2676                         SMB_VFS_FSTAT(fsp, psbuf);
2677                 }
2678         }
2679         return NT_STATUS_OK;
2680
2681  fail:
2682         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
2683
2684         if (fsp != NULL) {
2685                 close_file(fsp, ERROR_CLOSE);
2686                 fsp = NULL;
2687         }
2688         return status;
2689 }
2690
2691 NTSTATUS create_file(connection_struct *conn,
2692                      struct smb_request *req,
2693                      uint16_t root_dir_fid,
2694                      const char *fname,
2695                      uint32_t access_mask,
2696                      uint32_t share_access,
2697                      uint32_t create_disposition,
2698                      uint32_t create_options,
2699                      uint32_t file_attributes,
2700                      uint32_t oplock_request,
2701                      SMB_BIG_UINT allocation_size,
2702                      struct security_descriptor *sd,
2703                      struct ea_list *ea_list,
2704
2705                      files_struct **result,
2706                      int *pinfo,
2707                      SMB_STRUCT_STAT *psbuf)
2708 {
2709         struct case_semantics_state *case_state = NULL;
2710         SMB_STRUCT_STAT sbuf;
2711         int info = FILE_WAS_OPENED;
2712         files_struct *fsp = NULL;
2713         NTSTATUS status;
2714
2715         DEBUG(10,("create_file: access_mask = 0x%x "
2716                   "file_attributes = 0x%x, share_access = 0x%x, "
2717                   "create_disposition = 0x%x create_options = 0x%x "
2718                   "oplock_request = 0x%x "
2719                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2720                   "fname = %s\n",
2721                   (unsigned int)access_mask,
2722                   (unsigned int)file_attributes,
2723                   (unsigned int)share_access,
2724                   (unsigned int)create_disposition,
2725                   (unsigned int)create_options,
2726                   (unsigned int)oplock_request,
2727                   (unsigned int)root_dir_fid,
2728                   ea_list, sd, fname));
2729
2730         /*
2731          * Get the file name.
2732          */
2733
2734         if (root_dir_fid != 0) {
2735                 /*
2736                  * This filename is relative to a directory fid.
2737                  */
2738                 char *parent_fname = NULL;
2739                 files_struct *dir_fsp = file_fsp(root_dir_fid);
2740
2741                 if (dir_fsp == NULL) {
2742                         status = NT_STATUS_INVALID_HANDLE;
2743                         goto fail;
2744                 }
2745
2746                 if (!dir_fsp->is_directory) {
2747
2748                         /*
2749                          * Check to see if this is a mac fork of some kind.
2750                          */
2751
2752                         if (is_ntfs_stream_name(fname)) {
2753                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2754                                 goto fail;
2755                         }
2756
2757                         /*
2758                           we need to handle the case when we get a
2759                           relative open relative to a file and the
2760                           pathname is blank - this is a reopen!
2761                           (hint from demyn plantenberg)
2762                         */
2763
2764                         status = NT_STATUS_INVALID_HANDLE;
2765                         goto fail;
2766                 }
2767
2768                 if (ISDOT(dir_fsp->fsp_name)) {
2769                         /*
2770                          * We're at the toplevel dir, the final file name
2771                          * must not contain ./, as this is filtered out
2772                          * normally by srvstr_get_path and unix_convert
2773                          * explicitly rejects paths containing ./.
2774                          */
2775                         parent_fname = talloc_strdup(talloc_tos(), "");
2776                         if (parent_fname == NULL) {
2777                                 status = NT_STATUS_NO_MEMORY;
2778                                 goto fail;
2779                         }
2780                 } else {
2781                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2782
2783                         /*
2784                          * Copy in the base directory name.
2785                          */
2786
2787                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2788                                                     dir_name_len+2);
2789                         if (parent_fname == NULL) {
2790                                 status = NT_STATUS_NO_MEMORY;
2791                                 goto fail;
2792                         }
2793                         memcpy(parent_fname, dir_fsp->fsp_name,
2794                                dir_name_len+1);
2795
2796                         /*
2797                          * Ensure it ends in a '/'.
2798                          * We used TALLOC_SIZE +2 to add space for the '/'.
2799                          */
2800
2801                         if(dir_name_len
2802                            && (parent_fname[dir_name_len-1] != '\\')
2803                            && (parent_fname[dir_name_len-1] != '/')) {
2804                                 parent_fname[dir_name_len] = '/';
2805                                 parent_fname[dir_name_len+1] = '\0';
2806                         }
2807                 }
2808
2809                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2810                                         fname);
2811                 if (fname == NULL) {
2812                         status = NT_STATUS_NO_MEMORY;
2813                         goto fail;
2814                 }
2815         } else {
2816                 /*
2817                  * Check to see if this is a mac fork of some kind.
2818                  */
2819
2820                 if (is_ntfs_stream_name(fname)) {
2821                         enum FAKE_FILE_TYPE fake_file_type;
2822
2823                         fake_file_type = is_fake_file(fname);
2824
2825                         if (fake_file_type == FAKE_FILE_TYPE_NONE) {
2826                                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
2827                         }
2828
2829                         /*
2830                          * Here we go! support for changing the disk quotas
2831                          * --metze
2832                          *
2833                          * We need to fake up to open this MAGIC QUOTA file
2834                          * and return a valid FID.
2835                          *
2836                          * w2k close this file directly after openening xp
2837                          * also tries a QUERY_FILE_INFO on the file and then
2838                          * close it
2839                          */
2840                         status = open_fake_file(conn, fake_file_type, fname,
2841                                                 access_mask, &fsp);
2842                         if (!NT_STATUS_IS_OK(status)) {
2843                                 goto fail;
2844                         }
2845
2846                         SET_STAT_INVALID(sbuf);
2847
2848                         goto done;
2849                 }
2850         }
2851
2852         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
2853                 char *resolved_fname;
2854
2855                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
2856                                          &resolved_fname);
2857
2858                 if (!NT_STATUS_IS_OK(status)) {
2859                         /*
2860                          * For PATH_NOT_COVERED we had
2861                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
2862                          *                 ERRSRV, ERRbadpath);
2863                          * Need to fix in callers
2864                          */
2865                         goto fail;
2866                 }
2867                 fname = resolved_fname;
2868         }
2869
2870         /*
2871          * Check if POSIX semantics are wanted.
2872          */
2873
2874         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2875                 case_state = set_posix_case_semantics(talloc_tos(), conn);
2876                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
2877         }
2878
2879         {
2880                 char *converted_fname;
2881
2882                 SET_STAT_INVALID(sbuf);
2883
2884                 status = unix_convert(talloc_tos(), conn, fname, False,
2885                                       &converted_fname, NULL, &sbuf);
2886                 if (!NT_STATUS_IS_OK(status)) {
2887                         goto fail;
2888                 }
2889                 fname = converted_fname;
2890         }
2891
2892         /* All file access must go through check_name() */
2893
2894         status = check_name(conn, fname);
2895         if (!NT_STATUS_IS_OK(status)) {
2896                 goto fail;
2897         }
2898
2899         status = create_file_unixpath(
2900                 conn, req, fname, access_mask, share_access,
2901                 create_disposition, create_options, file_attributes,
2902                 oplock_request, allocation_size, sd, ea_list,
2903                 &fsp, &info, &sbuf);
2904
2905         if (!NT_STATUS_IS_OK(status)) {
2906                 goto fail;
2907         }
2908
2909  done:
2910         DEBUG(10, ("create_file: info=%d\n", info));
2911
2912         *result = fsp;
2913         if (pinfo != NULL) {
2914                 *pinfo = info;
2915         }
2916         if (psbuf != NULL) {
2917                 *psbuf = sbuf;
2918         }
2919         return NT_STATUS_OK;
2920
2921  fail:
2922         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
2923
2924         if (fsp != NULL) {
2925                 close_file(fsp, ERROR_CLOSE);
2926                 fsp = NULL;
2927         }
2928         return status;
2929 }