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 bool global_client_failed_oplock_break;
  26
  27 struct deferred_open_record {
  28         bool delayed_for_oplocks;
  29         struct file_id id;
  30 };
  31
  32 /****************************************************************************
  33  fd support routines - attempt to do a dos_open.
  34 ****************************************************************************/
  35
  36 static NTSTATUS fd_open(struct connection_struct *conn,
  37                     const char *fname,
  38                     files_struct *fsp,
  39                     int flags,
  40                     mode_t mode)
  41 {
  42         NTSTATUS status = NT_STATUS_OK;
  43
  44 #ifdef O_NOFOLLOW
  45         /*
  46          * Never follow symlinks on a POSIX client. The
  47          * client should be doing this.
  48          */
  49
  50         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
  51                 flags |= O_NOFOLLOW;
  52         }
  53 #endif
  54
  55         fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
  56         if (fsp->fh->fd == -1) {
  57                 status = map_nt_error_from_unix(errno);
  58         }
  59
  60         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
  61                     fname, flags, (int)mode, fsp->fh->fd,
  62                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
  63
  64         return status;
  65 }
  66
  67 /****************************************************************************
  68  Close the file associated with a fsp.
  69 ****************************************************************************/
  70
  71 NTSTATUS fd_close(files_struct *fsp)
  72 {
  73         int ret;
  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
  82         ret = SMB_VFS_CLOSE(fsp);
  83         fsp->fh->fd = -1;
  84         if (ret == -1) {
  85                 return map_nt_error_from_unix(errno);
  86         }
  87         return NT_STATUS_OK;
  88 }
  89
  90 /****************************************************************************
  91  Change the ownership of a file to that of the parent directory.
  92  Do this by fd if possible.
  93 ****************************************************************************/
  94
  95 static void change_file_owner_to_parent(connection_struct *conn,
  96                                         const char *inherit_from_dir,
  97                                         files_struct *fsp)
  98 {
  99         SMB_STRUCT_STAT parent_st;
 100         int ret;
 101
 102         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 103         if (ret == -1) {
 104                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 105                          "directory %s. Error was %s\n",
 106                          inherit_from_dir, strerror(errno) ));
 107                 return;
 108         }
 109
 110         become_root();
 111         ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
 112         unbecome_root();
 113         if (ret == -1) {
 114                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 115                          "file %s to parent directory uid %u. Error "
 116                          "was %s\n", fsp->fsp_name,
 117                          (unsigned int)parent_st.st_uid,
 118                          strerror(errno) ));
 119         }
 120
 121         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 122                   "parent directory uid %u.\n", fsp->fsp_name,
 123                   (unsigned int)parent_st.st_uid ));
 124 }
 125
 126 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 127                                        const char *inherit_from_dir,
 128                                        const char *fname,
 129                                        SMB_STRUCT_STAT *psbuf)
 130 {
 131         char *saved_dir = NULL;
 132         SMB_STRUCT_STAT sbuf;
 133         SMB_STRUCT_STAT parent_st;
 134         TALLOC_CTX *ctx = talloc_tos();
 135         NTSTATUS status = NT_STATUS_OK;
 136         int ret;
 137
 138         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 139         if (ret == -1) {
 140                 status = map_nt_error_from_unix(errno);
 141                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 142                          "directory %s. Error was %s\n",
 143                          inherit_from_dir, strerror(errno) ));
 144                 return status;
 145         }
 146
 147         /* We've already done an lstat into psbuf, and we know it's a
 148            directory. If we can cd into the directory and the dev/ino
 149            are the same then we can safely chown without races as
 150            we're locking the directory in place by being in it.  This
 151            should work on any UNIX (thanks tridge :-). JRA.
 152         */
 153
 154         saved_dir = vfs_GetWd(ctx,conn);
 155         if (!saved_dir) {
 156                 status = map_nt_error_from_unix(errno);
 157                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 158                          "current working directory. Error was %s\n",
 159                          strerror(errno)));
 160                 return status;
 161         }
 162
 163         /* Chdir into the new path. */
 164         if (vfs_ChDir(conn, fname) == -1) {
 165                 status = map_nt_error_from_unix(errno);
 166                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 167                          "current working directory to %s. Error "
 168                          "was %s\n", fname, strerror(errno) ));
 169                 goto out;
 170         }
 171
 172         if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
 173                 status = map_nt_error_from_unix(errno);
 174                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 175                          "directory '.' (%s) Error was %s\n",
 176                          fname, strerror(errno)));
 177                 goto out;
 178         }
 179
 180         /* Ensure we're pointing at the same place. */
 181         if (sbuf.st_dev != psbuf->st_dev ||
 182             sbuf.st_ino != psbuf->st_ino ||
 183             sbuf.st_mode != psbuf->st_mode ) {
 184                 DEBUG(0,("change_dir_owner_to_parent: "
 185                          "device/inode/mode on directory %s changed. "
 186                          "Refusing to chown !\n", fname ));
 187                 status = NT_STATUS_ACCESS_DENIED;
 188                 goto out;
 189         }
 190
 191         become_root();
 192         ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
 193         unbecome_root();
 194         if (ret == -1) {
 195                 status = map_nt_error_from_unix(errno);
 196                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 197                           "directory %s to parent directory uid %u. "
 198                           "Error was %s\n", fname,
 199                           (unsigned int)parent_st.st_uid, strerror(errno) ));
 200                 goto out;
 201         }
 202
 203         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 204                   "directory %s to parent directory uid %u.\n",
 205                   fname, (unsigned int)parent_st.st_uid ));
 206
 207  out:
 208
 209         vfs_ChDir(conn,saved_dir);
 210         return status;
 211 }
 212
 213 /****************************************************************************
 214  Open a file.
 215 ****************************************************************************/
 216
 217 static NTSTATUS open_file(files_struct *fsp,
 218                           connection_struct *conn,
 219                           struct smb_request *req,
 220                           const char *parent_dir,
 221                           const char *name,
 222                           const char *path,
 223                           SMB_STRUCT_STAT *psbuf,
 224                           int flags,
 225                           mode_t unx_mode,
 226                           uint32 access_mask, /* client requested access mask. */
 227                           uint32 open_access_mask) /* what we're actually using in the open. */
 228 {
 229         NTSTATUS status = NT_STATUS_OK;
 230         int accmode = (flags & O_ACCMODE);
 231         int local_flags = flags;
 232         bool file_existed = VALID_STAT(*psbuf);
 233
 234         fsp->fh->fd = -1;
 235         errno = EPERM;
 236
 237         /* Check permissions */
 238
 239         /*
 240          * This code was changed after seeing a client open request
 241          * containing the open mode of (DENY_WRITE/read-only) with
 242          * the 'create if not exist' bit set. The previous code
 243          * would fail to open the file read only on a read-only share
 244          * as it was checking the flags parameter  directly against O_RDONLY,
 245          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 246          * JRA.
 247          */
 248
 249         if (!CAN_WRITE(conn)) {
 250                 /* It's a read-only share - fail if we wanted to write. */
 251                 if(accmode != O_RDONLY) {
 252                         DEBUG(3,("Permission denied opening %s\n", path));
 253                         return NT_STATUS_ACCESS_DENIED;
 254                 } else if(flags & O_CREAT) {
 255                         /* We don't want to write - but we must make sure that
 256                            O_CREAT doesn't create the file if we have write
 257                            access into the directory.
 258                         */
 259                         flags &= ~O_CREAT;
 260                         local_flags &= ~O_CREAT;
 261                 }
 262         }
 263
 264         /*
 265          * This little piece of insanity is inspired by the
 266          * fact that an NT client can open a file for O_RDONLY,
 267          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 268          * If the client *can* write to the file, then it expects to
 269          * truncate the file, even though it is opening for readonly.
 270          * Quicken uses this stupid trick in backup file creation...
 271          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 272          * for helping track this one down. It didn't bite us in 2.0.x
 273          * as we always opened files read-write in that release. JRA.
 274          */
 275
 276         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 277                 DEBUG(10,("open_file: truncate requested on read-only open "
 278                           "for file %s\n", path));
 279                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 280         }
 281
 282         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 283             (!file_existed && (local_flags & O_CREAT)) ||
 284             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 285
 286                 /*
 287                  * We can't actually truncate here as the file may be locked.
 288                  * open_file_ntcreate will take care of the truncate later. JRA.
 289                  */
 290
 291                 local_flags &= ~O_TRUNC;
 292
 293 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 294                 /*
 295                  * We would block on opening a FIFO with no one else on the
 296                  * other end. Do what we used to do and add O_NONBLOCK to the
 297                  * open flags. JRA.
 298                  */
 299
 300                 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
 301                         local_flags |= O_NONBLOCK;
 302                 }
 303 #endif
 304
 305                 /* Don't create files with Microsoft wildcard characters. */
 306                 if ((local_flags & O_CREAT) && !file_existed &&
 307                     ms_has_wild(path))  {
 308                         return NT_STATUS_OBJECT_NAME_INVALID;
 309                 }
 310
 311                 /* Actually do the open */
 312                 status = fd_open(conn, path, fsp, local_flags, unx_mode);
 313                 if (!NT_STATUS_IS_OK(status)) {
 314                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 315                                  "(flags=%d)\n",
 316                                  path,nt_errstr(status),local_flags,flags));
 317                         return status;
 318                 }
 319
 320                 if ((local_flags & O_CREAT) && !file_existed) {
 321
 322                         /* Inherit the ACL if required */
 323                         if (lp_inherit_perms(SNUM(conn))) {
 324                                 inherit_access_posix_acl(conn, parent_dir, path,
 325                                                    unx_mode);
 326                         }
 327
 328                         /* Change the owner if required. */
 329                         if (lp_inherit_owner(SNUM(conn))) {
 330                                 change_file_owner_to_parent(conn, parent_dir,
 331                                                             fsp);
 332                         }
 333
 334                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 335                                      FILE_NOTIFY_CHANGE_FILE_NAME, path);
 336                 }
 337
 338         } else {
 339                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 340         }
 341
 342         if (!file_existed) {
 343                 int ret;
 344
 345                 if (fsp->fh->fd == -1) {
 346                         ret = SMB_VFS_STAT(conn, path, psbuf);
 347                 } else {
 348                         ret = SMB_VFS_FSTAT(fsp, psbuf);
 349                         /* If we have an fd, this stat should succeed. */
 350                         if (ret == -1) {
 351                                 DEBUG(0,("Error doing fstat on open file %s "
 352                                          "(%s)\n", path,strerror(errno) ));
 353                         }
 354                 }
 355
 356                 /* For a non-io open, this stat failing means file not found. JRA */
 357                 if (ret == -1) {
 358                         status = map_nt_error_from_unix(errno);
 359                         fd_close(fsp);
 360                         return status;
 361                 }
 362         }
 363
 364         /*
 365          * POSIX allows read-only opens of directories. We don't
 366          * want to do this (we use a different code path for this)
 367          * so catch a directory open and return an EISDIR. JRA.
 368          */
 369
 370         if(S_ISDIR(psbuf->st_mode)) {
 371                 fd_close(fsp);
 372                 errno = EISDIR;
 373                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 374         }
 375
 376         fsp->mode = psbuf->st_mode;
 377         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
 378         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 379         fsp->file_pid = req ? req->smbpid : 0;
 380         fsp->can_lock = True;
 381         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 382         if (!CAN_WRITE(conn)) {
 383                 fsp->can_write = False;
 384         } else {
 385                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 386                         True : False;
 387         }
 388         fsp->print_file = False;
 389         fsp->modified = False;
 390         fsp->sent_oplock_break = NO_BREAK_SENT;
 391         fsp->is_directory = False;
 392         if (conn->aio_write_behind_list &&
 393             is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
 394                 fsp->aio_write_behind = True;
 395         }
 396
 397         string_set(&fsp->fsp_name, path);
 398         fsp->wcp = NULL; /* Write cache pointer. */
 399
 400         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 401                  conn->server_info->unix_name,
 402                  fsp->fsp_name,
 403                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 404                  conn->num_files_open + 1));
 405
 406         errno = 0;
 407         return NT_STATUS_OK;
 408 }
 409
 410 /*******************************************************************
 411  Return True if the filename is one of the special executable types.
 412 ********************************************************************/
 413
 414 static bool is_executable(const char *fname)
 415 {
 416         if ((fname = strrchr_m(fname,'.'))) {
 417                 if (strequal(fname,".com") ||
 418                     strequal(fname,".dll") ||
 419                     strequal(fname,".exe") ||
 420                     strequal(fname,".sym")) {
 421                         return True;
 422                 }
 423         }
 424         return False;
 425 }
 426
 427 /****************************************************************************
 428  Check if we can open a file with a share mode.
 429  Returns True if conflict, False if not.
 430 ****************************************************************************/
 431
 432 static bool share_conflict(struct share_mode_entry *entry,
 433                            uint32 access_mask,
 434                            uint32 share_access)
 435 {
 436         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 437                   "entry->share_access = 0x%x, "
 438                   "entry->private_options = 0x%x\n",
 439                   (unsigned int)entry->access_mask,
 440                   (unsigned int)entry->share_access,
 441                   (unsigned int)entry->private_options));
 442
 443         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 444                   (unsigned int)access_mask, (unsigned int)share_access));
 445
 446         if ((entry->access_mask & (FILE_WRITE_DATA|
 447                                    FILE_APPEND_DATA|
 448                                    FILE_READ_DATA|
 449                                    FILE_EXECUTE|
 450                                    DELETE_ACCESS)) == 0) {
 451                 DEBUG(10,("share_conflict: No conflict due to "
 452                           "entry->access_mask = 0x%x\n",
 453                           (unsigned int)entry->access_mask ));
 454                 return False;
 455         }
 456
 457         if ((access_mask & (FILE_WRITE_DATA|
 458                             FILE_APPEND_DATA|
 459                             FILE_READ_DATA|
 460                             FILE_EXECUTE|
 461                             DELETE_ACCESS)) == 0) {
 462                 DEBUG(10,("share_conflict: No conflict due to "
 463                           "access_mask = 0x%x\n",
 464                           (unsigned int)access_mask ));
 465                 return False;
 466         }
 467
 468 #if 1 /* JRA TEST - Superdebug. */
 469 #define CHECK_MASK(num, am, right, sa, share) \
 470         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 471                 (unsigned int)(num), (unsigned int)(am), \
 472                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 473         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 474                 (unsigned int)(num), (unsigned int)(sa), \
 475                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 476         if (((am) & (right)) && !((sa) & (share))) { \
 477                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 478 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 479                         (unsigned int)(share) )); \
 480                 return True; \
 481         }
 482 #else
 483 #define CHECK_MASK(num, am, right, sa, share) \
 484         if (((am) & (right)) && !((sa) & (share))) { \
 485                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 486 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 487                         (unsigned int)(share) )); \
 488                 return True; \
 489         }
 490 #endif
 491
 492         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 493                    share_access, FILE_SHARE_WRITE);
 494         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 495                    entry->share_access, FILE_SHARE_WRITE);
 496
 497         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 498                    share_access, FILE_SHARE_READ);
 499         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 500                    entry->share_access, FILE_SHARE_READ);
 501
 502         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 503                    share_access, FILE_SHARE_DELETE);
 504         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 505                    entry->share_access, FILE_SHARE_DELETE);
 506
 507         DEBUG(10,("share_conflict: No conflict.\n"));
 508         return False;
 509 }
 510
 511 #if defined(DEVELOPER)
 512 static void validate_my_share_entries(int num,
 513                                       struct share_mode_entry *share_entry)
 514 {
 515         files_struct *fsp;
 516
 517         if (!procid_is_me(&share_entry->pid)) {
 518                 return;
 519         }
 520
 521         if (is_deferred_open_entry(share_entry) &&
 522             !open_was_deferred(share_entry->op_mid)) {
 523                 char *str = talloc_asprintf(talloc_tos(),
 524                         "Got a deferred entry without a request: "
 525                         "PANIC: %s\n",
 526                         share_mode_str(talloc_tos(), num, share_entry));
 527                 smb_panic(str);
 528         }
 529
 530         if (!is_valid_share_mode_entry(share_entry)) {
 531                 return;
 532         }
 533
 534         fsp = file_find_dif(share_entry->id,
 535                             share_entry->share_file_id);
 536         if (!fsp) {
 537                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 538                          share_mode_str(talloc_tos(), num, share_entry) ));
 539                 smb_panic("validate_my_share_entries: Cannot match a "
 540                           "share entry with an open file\n");
 541         }
 542
 543         if (is_deferred_open_entry(share_entry) ||
 544             is_unused_share_mode_entry(share_entry)) {
 545                 goto panic;
 546         }
 547
 548         if ((share_entry->op_type == NO_OPLOCK) &&
 549             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 550                 /* Someone has already written to it, but I haven't yet
 551                  * noticed */
 552                 return;
 553         }
 554
 555         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 556                 goto panic;
 557         }
 558
 559         return;
 560
 561  panic:
 562         {
 563                 char *str;
 564                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 565                          share_mode_str(talloc_tos(), num, share_entry) ));
 566                 str = talloc_asprintf(talloc_tos(),
 567                         "validate_my_share_entries: "
 568                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 569                          fsp->fsp_name, (unsigned int)fsp->oplock_type,
 570                          (unsigned int)share_entry->op_type );
 571                 smb_panic(str);
 572         }
 573 }
 574 #endif
 575
 576 static bool is_stat_open(uint32 access_mask)
 577 {
 578         return (access_mask &&
 579                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 580                                   FILE_WRITE_ATTRIBUTES))==0) &&
 581                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 582                                  FILE_WRITE_ATTRIBUTES)) != 0));
 583 }
 584
 585 /****************************************************************************
 586  Deal with share modes
 587  Invarient: Share mode must be locked on entry and exit.
 588  Returns -1 on error, or number of share modes on success (may be zero).
 589 ****************************************************************************/
 590
 591 static NTSTATUS open_mode_check(connection_struct *conn,
 592                                 const char *fname,
 593                                 struct share_mode_lock *lck,
 594                                 uint32 access_mask,
 595                                 uint32 share_access,
 596                                 uint32 create_options,
 597                                 bool *file_existed)
 598 {
 599         int i;
 600
 601         if(lck->num_share_modes == 0) {
 602                 return NT_STATUS_OK;
 603         }
 604
 605         *file_existed = True;
 606
 607         /* A delete on close prohibits everything */
 608
 609         if (lck->delete_on_close) {
 610                 return NT_STATUS_DELETE_PENDING;
 611         }
 612
 613         if (is_stat_open(access_mask)) {
 614                 /* Stat open that doesn't trigger oplock breaks or share mode
 615                  * checks... ! JRA. */
 616                 return NT_STATUS_OK;
 617         }
 618
 619         /*
 620          * Check if the share modes will give us access.
 621          */
 622
 623 #if defined(DEVELOPER)
 624         for(i = 0; i < lck->num_share_modes; i++) {
 625                 validate_my_share_entries(i, &lck->share_modes[i]);
 626         }
 627 #endif
 628
 629         if (!lp_share_modes(SNUM(conn))) {
 630                 return NT_STATUS_OK;
 631         }
 632
 633         /* Now we check the share modes, after any oplock breaks. */
 634         for(i = 0; i < lck->num_share_modes; i++) {
 635
 636                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 637                         continue;
 638                 }
 639
 640                 /* someone else has a share lock on it, check to see if we can
 641                  * too */
 642                 if (share_conflict(&lck->share_modes[i],
 643                                    access_mask, share_access)) {
 644                         return NT_STATUS_SHARING_VIOLATION;
 645                 }
 646         }
 647
 648         return NT_STATUS_OK;
 649 }
 650
 651 static bool is_delete_request(files_struct *fsp) {
 652         return ((fsp->access_mask == DELETE_ACCESS) &&
 653                 (fsp->oplock_type == NO_OPLOCK));
 654 }
 655
 656 /*
 657  * 1) No files open at all or internal open: Grant whatever the client wants.
 658  *
 659  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 660  *    request, break if the oplock around is a batch oplock. If it's another
 661  *    requested access type, break.
 662  *
 663  * 3) Only level2 around: Grant level2 and do nothing else.
 664  */
 665
 666 static bool delay_for_oplocks(struct share_mode_lock *lck,
 667                               files_struct *fsp,
 668                               uint16 mid,
 669                               int pass_number,
 670                               int oplock_request)
 671 {
 672         int i;
 673         struct share_mode_entry *exclusive = NULL;
 674         bool valid_entry = False;
 675         bool delay_it = False;
 676         bool have_level2 = False;
 677         NTSTATUS status;
 678         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 679
 680         if (oplock_request & INTERNAL_OPEN_ONLY) {
 681                 fsp->oplock_type = NO_OPLOCK;
 682         }
 683
 684         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 685                 return False;
 686         }
 687
 688         for (i=0; i<lck->num_share_modes; i++) {
 689
 690                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 691                         continue;
 692                 }
 693
 694                 /* At least one entry is not an invalid or deferred entry. */
 695                 valid_entry = True;
 696
 697                 if (pass_number == 1) {
 698                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 699                                 SMB_ASSERT(exclusive == NULL);
 700                                 exclusive = &lck->share_modes[i];
 701                         }
 702                 } else {
 703                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 704                                 SMB_ASSERT(exclusive == NULL);
 705                                 exclusive = &lck->share_modes[i];
 706                         }
 707                 }
 708
 709                 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
 710                         SMB_ASSERT(exclusive == NULL);
 711                         have_level2 = True;
 712                 }
 713         }
 714
 715         if (!valid_entry) {
 716                 /* All entries are placeholders or deferred.
 717                  * Directly grant whatever the client wants. */
 718                 if (fsp->oplock_type == NO_OPLOCK) {
 719                         /* Store a level2 oplock, but don't tell the client */
 720                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 721                 }
 722                 return False;
 723         }
 724
 725         if (exclusive != NULL) { /* Found an exclusive oplock */
 726                 SMB_ASSERT(!have_level2);
 727                 delay_it = is_delete_request(fsp) ?
 728                         BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
 729         }
 730
 731         if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
 732                 /* We can at most grant level2 as there are other
 733                  * level2 or NO_OPLOCK entries. */
 734                 fsp->oplock_type = LEVEL_II_OPLOCK;
 735         }
 736
 737         if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
 738                 /* Store a level2 oplock, but don't tell the client */
 739                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 740         }
 741
 742         if (!delay_it) {
 743                 return False;
 744         }
 745
 746         /*
 747          * Send a break message to the oplock holder and delay the open for
 748          * our client.
 749          */
 750
 751         DEBUG(10, ("Sending break request to PID %s\n",
 752                    procid_str_static(&exclusive->pid)));
 753         exclusive->op_mid = mid;
 754
 755         /* Create the message. */
 756         share_mode_entry_to_message(msg, exclusive);
 757
 758         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 759            don't want this set in the share mode struct pointed to by lck. */
 760
 761         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 762                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 763         }
 764
 765         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 766                                     MSG_SMB_BREAK_REQUEST,
 767                                     (uint8 *)msg,
 768                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 769         if (!NT_STATUS_IS_OK(status)) {
 770                 DEBUG(3, ("Could not send oplock break message: %s\n",
 771                           nt_errstr(status)));
 772         }
 773
 774         return True;
 775 }
 776
 777 static bool request_timed_out(struct timeval request_time,
 778                               struct timeval timeout)
 779 {
 780         struct timeval now, end_time;
 781         GetTimeOfDay(&now);
 782         end_time = timeval_sum(&request_time, &timeout);
 783         return (timeval_compare(&end_time, &now) < 0);
 784 }
 785
 786 /****************************************************************************
 787  Handle the 1 second delay in returning a SHARING_VIOLATION error.
 788 ****************************************************************************/
 789
 790 static void defer_open(struct share_mode_lock *lck,
 791                        struct timeval request_time,
 792                        struct timeval timeout,
 793                        struct smb_request *req,
 794                        struct deferred_open_record *state)
 795 {
 796         int i;
 797
 798         /* Paranoia check */
 799
 800         for (i=0; i<lck->num_share_modes; i++) {
 801                 struct share_mode_entry *e = &lck->share_modes[i];
 802
 803                 if (!is_deferred_open_entry(e)) {
 804                         continue;
 805                 }
 806
 807                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
 808                         DEBUG(0, ("Trying to defer an already deferred "
 809                                   "request: mid=%d, exiting\n", req->mid));
 810                         exit_server("attempt to defer a deferred request");
 811                 }
 812         }
 813
 814         /* End paranoia check */
 815
 816         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
 817                   "open entry for mid %u\n",
 818                   (unsigned int)request_time.tv_sec,
 819                   (unsigned int)request_time.tv_usec,
 820                   (unsigned int)req->mid));
 821
 822         if (!push_deferred_smb_message(req, request_time, timeout,
 823                                        (char *)state, sizeof(*state))) {
 824                 exit_server("push_deferred_smb_message failed");
 825         }
 826         add_deferred_open(lck, req->mid, request_time, state->id);
 827
 828         /*
 829          * Push the MID of this packet on the signing queue.
 830          * We only do this once, the first time we push the packet
 831          * onto the deferred open queue, as this has a side effect
 832          * of incrementing the response sequence number.
 833          */
 834
 835         srv_defer_sign_response(req->mid);
 836 }
 837
 838
 839 /****************************************************************************
 840  On overwrite open ensure that the attributes match.
 841 ****************************************************************************/
 842
 843 static bool open_match_attributes(connection_struct *conn,
 844                                   const char *path,
 845                                   uint32 old_dos_attr,
 846                                   uint32 new_dos_attr,
 847                                   mode_t existing_unx_mode,
 848                                   mode_t new_unx_mode,
 849                                   mode_t *returned_unx_mode)
 850 {
 851         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
 852
 853         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 854         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 855
 856         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
 857            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
 858                 *returned_unx_mode = new_unx_mode;
 859         } else {
 860                 *returned_unx_mode = (mode_t)0;
 861         }
 862
 863         DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
 864                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
 865                   "returned_unx_mode = 0%o\n",
 866                   path,
 867                   (unsigned int)old_dos_attr,
 868                   (unsigned int)existing_unx_mode,
 869                   (unsigned int)new_dos_attr,
 870                   (unsigned int)*returned_unx_mode ));
 871
 872         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 873         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 874                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
 875                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
 876                         return False;
 877                 }
 878         }
 879         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 880                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
 881                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
 882                         return False;
 883                 }
 884         }
 885         return True;
 886 }
 887
 888 /****************************************************************************
 889  Special FCB or DOS processing in the case of a sharing violation.
 890  Try and find a duplicated file handle.
 891 ****************************************************************************/
 892
 893 static files_struct *fcb_or_dos_open(connection_struct *conn,
 894                                      const char *fname,
 895                                      struct file_id id,
 896                                      uint16 file_pid,
 897                                      uint16 vuid,
 898                                      uint32 access_mask,
 899                                      uint32 share_access,
 900                                      uint32 create_options)
 901 {
 902         files_struct *fsp;
 903         files_struct *dup_fsp;
 904
 905         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 906                  "file %s.\n", fname ));
 907
 908         for(fsp = file_find_di_first(id); fsp;
 909             fsp = file_find_di_next(fsp)) {
 910
 911                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 912                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 913                           "access_mask = 0x%x\n", fsp->fsp_name,
 914                           fsp->fh->fd, (unsigned int)fsp->vuid,
 915                           (unsigned int)fsp->file_pid,
 916                           (unsigned int)fsp->fh->private_options,
 917                           (unsigned int)fsp->access_mask ));
 918
 919                 if (fsp->fh->fd != -1 &&
 920                     fsp->vuid == vuid &&
 921                     fsp->file_pid == file_pid &&
 922                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 923                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 924                     (fsp->access_mask & FILE_WRITE_DATA) &&
 925                     strequal(fsp->fsp_name, fname)) {
 926                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 927                         break;
 928                 }
 929         }
 930
 931         if (!fsp) {
 932                 return NULL;
 933         }
 934
 935         /* quite an insane set of semantics ... */
 936         if (is_executable(fname) &&
 937             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 938                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 939                 return NULL;
 940         }
 941
 942         /* We need to duplicate this fsp. */
 943         if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
 944                                           create_options, &dup_fsp))) {
 945                 return NULL;
 946         }
 947
 948         return dup_fsp;
 949 }
 950
 951 /****************************************************************************
 952  Open a file with a share mode - old openX method - map into NTCreate.
 953 ****************************************************************************/
 954
 955 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 956                                  uint32 *paccess_mask,
 957                                  uint32 *pshare_mode,
 958                                  uint32 *pcreate_disposition,
 959                                  uint32 *pcreate_options)
 960 {
 961         uint32 access_mask;
 962         uint32 share_mode;
 963         uint32 create_disposition;
 964         uint32 create_options = 0;
 965
 966         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 967                   "open_func = 0x%x\n",
 968                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 969
 970         /* Create the NT compatible access_mask. */
 971         switch (GET_OPENX_MODE(deny_mode)) {
 972                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 973                 case DOS_OPEN_RDONLY:
 974                         access_mask = FILE_GENERIC_READ;
 975                         break;
 976                 case DOS_OPEN_WRONLY:
 977                         access_mask = FILE_GENERIC_WRITE;
 978                         break;
 979                 case DOS_OPEN_RDWR:
 980                 case DOS_OPEN_FCB:
 981                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 982                         break;
 983                 default:
 984                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 985                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 986                         return False;
 987         }
 988
 989         /* Create the NT compatible create_disposition. */
 990         switch (open_func) {
 991                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 992                         create_disposition = FILE_CREATE;
 993                         break;
 994
 995                 case OPENX_FILE_EXISTS_OPEN:
 996                         create_disposition = FILE_OPEN;
 997                         break;
 998
 999                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1000                         create_disposition = FILE_OPEN_IF;
1001                         break;
1002
1003                 case OPENX_FILE_EXISTS_TRUNCATE:
1004                         create_disposition = FILE_OVERWRITE;
1005                         break;
1006
1007                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1008                         create_disposition = FILE_OVERWRITE_IF;
1009                         break;
1010
1011                 default:
1012                         /* From samba4 - to be confirmed. */
1013                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1014                                 create_disposition = FILE_CREATE;
1015                                 break;
1016                         }
1017                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1018                                   "open_func 0x%x\n", (unsigned int)open_func));
1019                         return False;
1020         }
1021
1022         /* Create the NT compatible share modes. */
1023         switch (GET_DENY_MODE(deny_mode)) {
1024                 case DENY_ALL:
1025                         share_mode = FILE_SHARE_NONE;
1026                         break;
1027
1028                 case DENY_WRITE:
1029                         share_mode = FILE_SHARE_READ;
1030                         break;
1031
1032                 case DENY_READ:
1033                         share_mode = FILE_SHARE_WRITE;
1034                         break;
1035
1036                 case DENY_NONE:
1037                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1038                         break;
1039
1040                 case DENY_DOS:
1041                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1042                         if (is_executable(fname)) {
1043                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1044                         } else {
1045                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1046                                         share_mode = FILE_SHARE_READ;
1047                                 } else {
1048                                         share_mode = FILE_SHARE_NONE;
1049                                 }
1050                         }
1051                         break;
1052
1053                 case DENY_FCB:
1054                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1055                         share_mode = FILE_SHARE_NONE;
1056                         break;
1057
1058                 default:
1059                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1060                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1061                         return False;
1062         }
1063
1064         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1065                   "share_mode = 0x%x, create_disposition = 0x%x, "
1066                   "create_options = 0x%x\n",
1067                   fname,
1068                   (unsigned int)access_mask,
1069                   (unsigned int)share_mode,
1070                   (unsigned int)create_disposition,
1071                   (unsigned int)create_options ));
1072
1073         if (paccess_mask) {
1074                 *paccess_mask = access_mask;
1075         }
1076         if (pshare_mode) {
1077                 *pshare_mode = share_mode;
1078         }
1079         if (pcreate_disposition) {
1080                 *pcreate_disposition = create_disposition;
1081         }
1082         if (pcreate_options) {
1083                 *pcreate_options = create_options;
1084         }
1085
1086         return True;
1087
1088 }
1089
1090 static void schedule_defer_open(struct share_mode_lock *lck,
1091                                 struct timeval request_time,
1092                                 struct smb_request *req)
1093 {
1094         struct deferred_open_record state;
1095
1096         /* This is a relative time, added to the absolute
1097            request_time value to get the absolute timeout time.
1098            Note that if this is the second or greater time we enter
1099            this codepath for this particular request mid then
1100            request_time is left as the absolute time of the *first*
1101            time this request mid was processed. This is what allows
1102            the request to eventually time out. */
1103
1104         struct timeval timeout;
1105
1106         /* Normally the smbd we asked should respond within
1107          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1108          * the client did, give twice the timeout as a safety
1109          * measure here in case the other smbd is stuck
1110          * somewhere else. */
1111
1112         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1113
1114         /* Nothing actually uses state.delayed_for_oplocks
1115            but it's handy to differentiate in debug messages
1116            between a 30 second delay due to oplock break, and
1117            a 1 second delay for share mode conflicts. */
1118
1119         state.delayed_for_oplocks = True;
1120         state.id = lck->id;
1121
1122         if (!request_timed_out(request_time, timeout)) {
1123                 defer_open(lck, request_time, timeout, req, &state);
1124         }
1125 }
1126
1127 /****************************************************************************
1128  Open a file with a share mode.
1129 ****************************************************************************/
1130
1131 NTSTATUS open_file_ntcreate(connection_struct *conn,
1132                             struct smb_request *req,
1133                             const char *fname,
1134                             SMB_STRUCT_STAT *psbuf,
1135                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1136                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1137                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1138                             uint32 create_options,      /* options such as delete on close. */
1139                             uint32 new_dos_attributes,  /* attributes used for new file. */
1140                             int oplock_request,         /* internal Samba oplock codes. */
1141                                                         /* Information (FILE_EXISTS etc.) */
1142                             int *pinfo,
1143                             files_struct **result)
1144 {
1145         int flags=0;
1146         int flags2=0;
1147         bool file_existed = VALID_STAT(*psbuf);
1148         bool def_acl = False;
1149         bool posix_open = False;
1150         bool new_file_created = False;
1151         struct file_id id;
1152         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1153         files_struct *fsp = NULL;
1154         mode_t new_unx_mode = (mode_t)0;
1155         mode_t unx_mode = (mode_t)0;
1156         int info;
1157         uint32 existing_dos_attributes = 0;
1158         struct pending_message_list *pml = NULL;
1159         struct timeval request_time = timeval_zero();
1160         struct share_mode_lock *lck = NULL;
1161         uint32 open_access_mask = access_mask;
1162         NTSTATUS status;
1163         int ret_flock;
1164         char *parent_dir;
1165         const char *newname;
1166
1167         ZERO_STRUCT(id);
1168
1169         if (conn->printer) {
1170                 /*
1171                  * Printers are handled completely differently.
1172                  * Most of the passed parameters are ignored.
1173                  */
1174
1175                 if (pinfo) {
1176                         *pinfo = FILE_WAS_CREATED;
1177                 }
1178
1179                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1180
1181                 return print_fsp_open(conn, fname, result);
1182         }
1183
1184         if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1185                                    &newname)) {
1186                 return NT_STATUS_NO_MEMORY;
1187         }
1188
1189         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1190                 posix_open = True;
1191                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1192                 new_dos_attributes = 0;
1193         } else {
1194                 /* We add aARCH to this as this mode is only used if the file is
1195                  * created new. */
1196                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1197                                      parent_dir);
1198         }
1199
1200         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1201                    "access_mask=0x%x share_access=0x%x "
1202                    "create_disposition = 0x%x create_options=0x%x "
1203                    "unix mode=0%o oplock_request=%d\n",
1204                    fname, new_dos_attributes, access_mask, share_access,
1205                    create_disposition, create_options, unx_mode,
1206                    oplock_request));
1207
1208         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1209                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1210                 return NT_STATUS_INTERNAL_ERROR;
1211         }
1212
1213         /*
1214          * Only non-internal opens can be deferred at all
1215          */
1216
1217         if ((req != NULL)
1218             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1219                 struct deferred_open_record *state =
1220                         (struct deferred_open_record *)pml->private_data.data;
1221
1222                 /* Remember the absolute time of the original
1223                    request with this mid. We'll use it later to
1224                    see if this has timed out. */
1225
1226                 request_time = pml->request_time;
1227
1228                 /* Remove the deferred open entry under lock. */
1229                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1230                                           NULL);
1231                 if (lck == NULL) {
1232                         DEBUG(0, ("could not get share mode lock\n"));
1233                 } else {
1234                         del_deferred_open_entry(lck, req->mid);
1235                         TALLOC_FREE(lck);
1236                 }
1237
1238                 /* Ensure we don't reprocess this message. */
1239                 remove_deferred_open_smb_message(req->mid);
1240         }
1241
1242         status = check_name(conn, fname);
1243         if (!NT_STATUS_IS_OK(status)) {
1244                 return status;
1245         }
1246
1247         if (!posix_open) {
1248                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1249                 if (file_existed) {
1250                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1251                 }
1252         }
1253
1254         /* ignore any oplock requests if oplocks are disabled */
1255         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1256             IS_VETO_OPLOCK_PATH(conn, fname)) {
1257                 /* Mask off everything except the private Samba bits. */
1258                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1259         }
1260
1261         /* this is for OS/2 long file names - say we don't support them */
1262         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1263                 /* OS/2 Workplace shell fix may be main code stream in a later
1264                  * release. */
1265                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1266                          "supported.\n"));
1267                 if (use_nt_status()) {
1268                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1269                 }
1270                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1271         }
1272
1273         switch( create_disposition ) {
1274                 /*
1275                  * Currently we're using FILE_SUPERSEDE as the same as
1276                  * FILE_OVERWRITE_IF but they really are
1277                  * different. FILE_SUPERSEDE deletes an existing file
1278                  * (requiring delete access) then recreates it.
1279                  */
1280                 case FILE_SUPERSEDE:
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_OVERWRITE_IF:
1287                         /* If file exists replace/overwrite. If file doesn't
1288                          * exist create. */
1289                         flags2 |= (O_CREAT | O_TRUNC);
1290                         break;
1291
1292                 case FILE_OPEN:
1293                         /* If file exists open. If file doesn't exist error. */
1294                         if (!file_existed) {
1295                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1296                                          "requested for file %s and file "
1297                                          "doesn't exist.\n", fname ));
1298                                 errno = ENOENT;
1299                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1300                         }
1301                         break;
1302
1303                 case FILE_OVERWRITE:
1304                         /* If file exists overwrite. If file doesn't exist
1305                          * error. */
1306                         if (!file_existed) {
1307                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1308                                          "requested for file %s and file "
1309                                          "doesn't exist.\n", fname ));
1310                                 errno = ENOENT;
1311                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1312                         }
1313                         flags2 |= O_TRUNC;
1314                         break;
1315
1316                 case FILE_CREATE:
1317                         /* If file exists error. If file doesn't exist
1318                          * create. */
1319                         if (file_existed) {
1320                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1321                                          "requested for file %s and file "
1322                                          "already exists.\n", fname ));
1323                                 if (S_ISDIR(psbuf->st_mode)) {
1324                                         errno = EISDIR;
1325                                 } else {
1326                                         errno = EEXIST;
1327                                 }
1328                                 return map_nt_error_from_unix(errno);
1329                         }
1330                         flags2 |= (O_CREAT|O_EXCL);
1331                         break;
1332
1333                 case FILE_OPEN_IF:
1334                         /* If file exists open. If file doesn't exist
1335                          * create. */
1336                         flags2 |= O_CREAT;
1337                         break;
1338
1339                 default:
1340                         return NT_STATUS_INVALID_PARAMETER;
1341         }
1342
1343         /* We only care about matching attributes on file exists and
1344          * overwrite. */
1345
1346         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1347                              (create_disposition == FILE_OVERWRITE_IF))) {
1348                 if (!open_match_attributes(conn, fname,
1349                                            existing_dos_attributes,
1350                                            new_dos_attributes, psbuf->st_mode,
1351                                            unx_mode, &new_unx_mode)) {
1352                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1353                                  "for file %s (%x %x) (0%o, 0%o)\n",
1354                                  fname, existing_dos_attributes,
1355                                  new_dos_attributes,
1356                                  (unsigned int)psbuf->st_mode,
1357                                  (unsigned int)unx_mode ));
1358                         errno = EACCES;
1359                         return NT_STATUS_ACCESS_DENIED;
1360                 }
1361         }
1362
1363         /* This is a nasty hack - must fix... JRA. */
1364         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1365                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1366         }
1367
1368         /*
1369          * Convert GENERIC bits to specific bits.
1370          */
1371
1372         se_map_generic(&access_mask, &file_generic_mapping);
1373         open_access_mask = access_mask;
1374
1375         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1376                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1377         }
1378
1379         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1380                    "access_mask=0x%x\n", fname, access_mask ));
1381
1382         /*
1383          * Note that we ignore the append flag as append does not
1384          * mean the same thing under DOS and Unix.
1385          */
1386
1387         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1388                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1389                 /* DENY_DOS opens are always underlying read-write on the
1390                    file handle, no matter what the requested access mask
1391                     says. */
1392                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1393                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1394                         flags = O_RDWR;
1395                 } else {
1396                         flags = O_WRONLY;
1397                 }
1398         } else {
1399                 flags = O_RDONLY;
1400         }
1401
1402         /*
1403          * Currently we only look at FILE_WRITE_THROUGH for create options.
1404          */
1405
1406 #if defined(O_SYNC)
1407         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1408                 flags2 |= O_SYNC;
1409         }
1410 #endif /* O_SYNC */
1411
1412         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1413                 flags2 |= O_APPEND;
1414         }
1415
1416         if (!posix_open && !CAN_WRITE(conn)) {
1417                 /*
1418                  * We should really return a permission denied error if either
1419                  * O_CREAT or O_TRUNC are set, but for compatibility with
1420                  * older versions of Samba we just AND them out.
1421                  */
1422                 flags2 &= ~(O_CREAT|O_TRUNC);
1423         }
1424
1425         /*
1426          * Ensure we can't write on a read-only share or file.
1427          */
1428
1429         if (flags != O_RDONLY && file_existed &&
1430             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1431                 DEBUG(5,("open_file_ntcreate: write access requested for "
1432                          "file %s on read only %s\n",
1433                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1434                 errno = EACCES;
1435                 return NT_STATUS_ACCESS_DENIED;
1436         }
1437
1438         status = file_new(conn, &fsp);
1439         if(!NT_STATUS_IS_OK(status)) {
1440                 return status;
1441         }
1442
1443         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1444         fsp->share_access = share_access;
1445         fsp->fh->private_options = create_options;
1446         fsp->access_mask = open_access_mask; /* We change this to the
1447                                               * requested access_mask after
1448                                               * the open is done. */
1449         fsp->posix_open = posix_open;
1450
1451         /* Ensure no SAMBA_PRIVATE bits can be set. */
1452         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1453
1454         if (timeval_is_zero(&request_time)) {
1455                 request_time = fsp->open_time;
1456         }
1457
1458         if (file_existed) {
1459                 struct timespec old_write_time = get_mtimespec(psbuf);
1460                 id = vfs_file_id_from_sbuf(conn, psbuf);
1461
1462                 lck = get_share_mode_lock(talloc_tos(), id,
1463                                           conn->connectpath,
1464                                           fname, &old_write_time);
1465
1466                 if (lck == NULL) {
1467                         file_free(fsp);
1468                         DEBUG(0, ("Could not get share mode lock\n"));
1469                         return NT_STATUS_SHARING_VIOLATION;
1470                 }
1471
1472                 /* First pass - send break only on batch oplocks. */
1473                 if ((req != NULL)
1474                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1475                                          oplock_request)) {
1476                         schedule_defer_open(lck, request_time, req);
1477                         TALLOC_FREE(lck);
1478                         file_free(fsp);
1479                         return NT_STATUS_SHARING_VIOLATION;
1480                 }
1481
1482                 /* Use the client requested access mask here, not the one we
1483                  * open with. */
1484                 status = open_mode_check(conn, fname, lck,
1485                                          access_mask, share_access,
1486                                          create_options, &file_existed);
1487
1488                 if (NT_STATUS_IS_OK(status)) {
1489                         /* We might be going to allow this open. Check oplock
1490                          * status again. */
1491                         /* Second pass - send break for both batch or
1492                          * exclusive oplocks. */
1493                         if ((req != NULL)
1494                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1495                                                   oplock_request)) {
1496                                 schedule_defer_open(lck, request_time, req);
1497                                 TALLOC_FREE(lck);
1498                                 file_free(fsp);
1499                                 return NT_STATUS_SHARING_VIOLATION;
1500                         }
1501                 }
1502
1503                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1504                         /* DELETE_PENDING is not deferred for a second */
1505                         TALLOC_FREE(lck);
1506                         file_free(fsp);
1507                         return status;
1508                 }
1509
1510                 if (!NT_STATUS_IS_OK(status)) {
1511                         uint32 can_access_mask;
1512                         bool can_access = True;
1513
1514                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1515
1516                         /* Check if this can be done with the deny_dos and fcb
1517                          * calls. */
1518                         if (create_options &
1519                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1520                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1521                                 files_struct *fsp_dup;
1522
1523                                 if (req == NULL) {
1524                                         DEBUG(0, ("DOS open without an SMB "
1525                                                   "request!\n"));
1526                                         TALLOC_FREE(lck);
1527                                         file_free(fsp);
1528                                         return NT_STATUS_INTERNAL_ERROR;
1529                                 }
1530
1531                                 /* Use the client requested access mask here,
1532                                  * not the one we open with. */
1533                                 fsp_dup = fcb_or_dos_open(conn, fname, id,
1534                                                           req->smbpid,
1535                                                           req->vuid,
1536                                                           access_mask,
1537                                                           share_access,
1538                                                           create_options);
1539
1540                                 if (fsp_dup) {
1541                                         TALLOC_FREE(lck);
1542                                         file_free(fsp);
1543                                         if (pinfo) {
1544                                                 *pinfo = FILE_WAS_OPENED;
1545                                         }
1546                                         conn->num_files_open++;
1547                                         *result = fsp_dup;
1548                                         return NT_STATUS_OK;
1549                                 }
1550                         }
1551
1552                         /*
1553                          * This next line is a subtlety we need for
1554                          * MS-Access. If a file open will fail due to share
1555                          * permissions and also for security (access) reasons,
1556                          * we need to return the access failed error, not the
1557                          * share error. We can't open the file due to kernel
1558                          * oplock deadlock (it's possible we failed above on
1559                          * the open_mode_check()) so use a userspace check.
1560                          */
1561
1562                         if (flags & O_RDWR) {
1563                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1564                         } else if (flags & O_WRONLY) {
1565                                 can_access_mask = FILE_WRITE_DATA;
1566                         } else {
1567                                 can_access_mask = FILE_READ_DATA;
1568                         }
1569
1570                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1571                             !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1572                                 can_access = False;
1573                         }
1574
1575                         /*
1576                          * If we're returning a share violation, ensure we
1577                          * cope with the braindead 1 second delay.
1578                          */
1579
1580                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1581                             lp_defer_sharing_violations()) {
1582                                 struct timeval timeout;
1583                                 struct deferred_open_record state;
1584                                 int timeout_usecs;
1585
1586                                 /* this is a hack to speed up torture tests
1587                                    in 'make test' */
1588                                 timeout_usecs = lp_parm_int(SNUM(conn),
1589                                                             "smbd","sharedelay",
1590                                                             SHARING_VIOLATION_USEC_WAIT);
1591
1592                                 /* This is a relative time, added to the absolute
1593                                    request_time value to get the absolute timeout time.
1594                                    Note that if this is the second or greater time we enter
1595                                    this codepath for this particular request mid then
1596                                    request_time is left as the absolute time of the *first*
1597                                    time this request mid was processed. This is what allows
1598                                    the request to eventually time out. */
1599
1600                                 timeout = timeval_set(0, timeout_usecs);
1601
1602                                 /* Nothing actually uses state.delayed_for_oplocks
1603                                    but it's handy to differentiate in debug messages
1604                                    between a 30 second delay due to oplock break, and
1605                                    a 1 second delay for share mode conflicts. */
1606
1607                                 state.delayed_for_oplocks = False;
1608                                 state.id = id;
1609
1610                                 if ((req != NULL)
1611                                     && !request_timed_out(request_time,
1612                                                           timeout)) {
1613                                         defer_open(lck, request_time, timeout,
1614                                                    req, &state);
1615                                 }
1616                         }
1617
1618                         TALLOC_FREE(lck);
1619                         if (can_access) {
1620                                 /*
1621                                  * We have detected a sharing violation here
1622                                  * so return the correct error code
1623                                  */
1624                                 status = NT_STATUS_SHARING_VIOLATION;
1625                         } else {
1626                                 status = NT_STATUS_ACCESS_DENIED;
1627                         }
1628                         file_free(fsp);
1629                         return status;
1630                 }
1631
1632                 /*
1633                  * We exit this block with the share entry *locked*.....
1634                  */
1635         }
1636
1637         SMB_ASSERT(!file_existed || (lck != NULL));
1638
1639         /*
1640          * Ensure we pay attention to default ACLs on directories if required.
1641          */
1642
1643         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1644             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1645                 unx_mode = 0777;
1646         }
1647
1648         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1649                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1650                  (unsigned int)flags, (unsigned int)flags2,
1651                  (unsigned int)unx_mode, (unsigned int)access_mask,
1652                  (unsigned int)open_access_mask));
1653
1654         /*
1655          * open_file strips any O_TRUNC flags itself.
1656          */
1657
1658         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1659                              flags|flags2, unx_mode, access_mask,
1660                              open_access_mask);
1661
1662         if (!NT_STATUS_IS_OK(fsp_open)) {
1663                 if (lck != NULL) {
1664                         TALLOC_FREE(lck);
1665                 }
1666                 file_free(fsp);
1667                 return fsp_open;
1668         }
1669
1670         if (!file_existed) {
1671                 struct timespec old_write_time = get_mtimespec(psbuf);
1672                 /*
1673                  * Deal with the race condition where two smbd's detect the
1674                  * file doesn't exist and do the create at the same time. One
1675                  * of them will win and set a share mode, the other (ie. this
1676                  * one) should check if the requested share mode for this
1677                  * create is allowed.
1678                  */
1679
1680                 /*
1681                  * Now the file exists and fsp is successfully opened,
1682                  * fsp->dev and fsp->inode are valid and should replace the
1683                  * dev=0,inode=0 from a non existent file. Spotted by
1684                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1685                  */
1686
1687                 id = fsp->file_id;
1688
1689                 lck = get_share_mode_lock(talloc_tos(), id,
1690                                           conn->connectpath,
1691                                           fname, &old_write_time);
1692
1693                 if (lck == NULL) {
1694                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1695                                   "mode lock for %s\n", fname));
1696                         fd_close(fsp);
1697                         file_free(fsp);
1698                         return NT_STATUS_SHARING_VIOLATION;
1699                 }
1700
1701                 /* First pass - send break only on batch oplocks. */
1702                 if ((req != NULL)
1703                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1704                                          oplock_request)) {
1705                         schedule_defer_open(lck, request_time, req);
1706                         TALLOC_FREE(lck);
1707                         fd_close(fsp);
1708                         file_free(fsp);
1709                         return NT_STATUS_SHARING_VIOLATION;
1710                 }
1711
1712                 status = open_mode_check(conn, fname, lck,
1713                                          access_mask, share_access,
1714                                          create_options, &file_existed);
1715
1716                 if (NT_STATUS_IS_OK(status)) {
1717                         /* We might be going to allow this open. Check oplock
1718                          * status again. */
1719                         /* Second pass - send break for both batch or
1720                          * exclusive oplocks. */
1721                         if ((req != NULL)
1722                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1723                                                  oplock_request)) {
1724                                 schedule_defer_open(lck, request_time, req);
1725                                 TALLOC_FREE(lck);
1726                                 fd_close(fsp);
1727                                 file_free(fsp);
1728                                 return NT_STATUS_SHARING_VIOLATION;
1729                         }
1730                 }
1731
1732                 if (!NT_STATUS_IS_OK(status)) {
1733                         struct deferred_open_record state;
1734
1735                         fd_close(fsp);
1736                         file_free(fsp);
1737
1738                         state.delayed_for_oplocks = False;
1739                         state.id = id;
1740
1741                         /* Do it all over again immediately. In the second
1742                          * round we will find that the file existed and handle
1743                          * the DELETE_PENDING and FCB cases correctly. No need
1744                          * to duplicate the code here. Essentially this is a
1745                          * "goto top of this function", but don't tell
1746                          * anybody... */
1747
1748                         if (req != NULL) {
1749                                 defer_open(lck, request_time, timeval_zero(),
1750                                            req, &state);
1751                         }
1752                         TALLOC_FREE(lck);
1753                         return status;
1754                 }
1755
1756                 /*
1757                  * We exit this block with the share entry *locked*.....
1758                  */
1759
1760         }
1761
1762         SMB_ASSERT(lck != NULL);
1763
1764         /* note that we ignore failure for the following. It is
1765            basically a hack for NFS, and NFS will never set one of
1766            these only read them. Nobody but Samba can ever set a deny
1767            mode and we have already checked our more authoritative
1768            locking database for permission to set this deny mode. If
1769            the kernel refuses the operations then the kernel is wrong.
1770            note that GPFS supports it as well - jmcd */
1771
1772         if (fsp->fh->fd != -1) {
1773                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1774                 if(ret_flock == -1 ){
1775
1776                         TALLOC_FREE(lck);
1777                         fd_close(fsp);
1778                         file_free(fsp);
1779
1780                         return NT_STATUS_SHARING_VIOLATION;
1781                 }
1782         }
1783
1784         /*
1785          * At this point onwards, we can guarentee that the share entry
1786          * is locked, whether we created the file or not, and that the
1787          * deny mode is compatible with all current opens.
1788          */
1789
1790         /*
1791          * If requested, truncate the file.
1792          */
1793
1794         if (flags2&O_TRUNC) {
1795                 /*
1796                  * We are modifing the file after open - update the stat
1797                  * struct..
1798                  */
1799                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1800                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1801                         status = map_nt_error_from_unix(errno);
1802                         TALLOC_FREE(lck);
1803                         fd_close(fsp);
1804                         file_free(fsp);
1805                         return status;
1806                 }
1807         }
1808
1809         /* Record the options we were opened with. */
1810         fsp->share_access = share_access;
1811         fsp->fh->private_options = create_options;
1812         fsp->access_mask = access_mask;
1813
1814         if (file_existed) {
1815                 /* stat opens on existing files don't get oplocks. */
1816                 if (is_stat_open(open_access_mask)) {
1817                         fsp->oplock_type = NO_OPLOCK;
1818                 }
1819
1820                 if (!(flags2 & O_TRUNC)) {
1821                         info = FILE_WAS_OPENED;
1822                 } else {
1823                         info = FILE_WAS_OVERWRITTEN;
1824                 }
1825         } else {
1826                 info = FILE_WAS_CREATED;
1827         }
1828
1829         if (pinfo) {
1830                 *pinfo = info;
1831         }
1832
1833         /*
1834          * Setup the oplock info in both the shared memory and
1835          * file structs.
1836          */
1837
1838         if ((fsp->oplock_type != NO_OPLOCK) &&
1839             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1840                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1841                         /* Could not get the kernel oplock */
1842                         fsp->oplock_type = NO_OPLOCK;
1843                 }
1844         }
1845
1846         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1847                 new_file_created = True;
1848         }
1849
1850         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1851                        fsp->oplock_type, new_file_created);
1852
1853         /* Handle strange delete on close create semantics. */
1854         if ((create_options & FILE_DELETE_ON_CLOSE)
1855             && (is_ntfs_stream_name(fname)
1856                 || can_set_initial_delete_on_close(lck))) {
1857                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1858
1859                 if (!NT_STATUS_IS_OK(status)) {
1860                         /* Remember to delete the mode we just added. */
1861                         del_share_mode(lck, fsp);
1862                         TALLOC_FREE(lck);
1863                         fd_close(fsp);
1864                         file_free(fsp);
1865                         return status;
1866                 }
1867                 /* Note that here we set the *inital* delete on close flag,
1868                    not the regular one. The magic gets handled in close. */
1869                 fsp->initial_delete_on_close = True;
1870         }
1871
1872         if (new_file_created) {
1873                 /* Files should be initially set as archive */
1874                 if (lp_map_archive(SNUM(conn)) ||
1875                     lp_store_dos_attributes(SNUM(conn))) {
1876                         if (!posix_open) {
1877                                 SMB_STRUCT_STAT tmp_sbuf;
1878                                 SET_STAT_INVALID(tmp_sbuf);
1879                                 if (file_set_dosmode(
1880                                             conn, fname,
1881                                             new_dos_attributes | aARCH,
1882                                             &tmp_sbuf, parent_dir,
1883                                             true) == 0) {
1884                                         unx_mode = tmp_sbuf.st_mode;
1885                                 }
1886                         }
1887                 }
1888         }
1889
1890         /*
1891          * Take care of inherited ACLs on created files - if default ACL not
1892          * selected.
1893          */
1894
1895         if (!posix_open && !file_existed && !def_acl) {
1896
1897                 int saved_errno = errno; /* We might get ENOSYS in the next
1898                                           * call.. */
1899
1900                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1901                     errno == ENOSYS) {
1902                         errno = saved_errno; /* Ignore ENOSYS */
1903                 }
1904
1905         } else if (new_unx_mode) {
1906
1907                 int ret = -1;
1908
1909                 /* Attributes need changing. File already existed. */
1910
1911                 {
1912                         int saved_errno = errno; /* We might get ENOSYS in the
1913                                                   * next call.. */
1914                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1915
1916                         if (ret == -1 && errno == ENOSYS) {
1917                                 errno = saved_errno; /* Ignore ENOSYS */
1918                         } else {
1919                                 DEBUG(5, ("open_file_ntcreate: reset "
1920                                           "attributes of file %s to 0%o\n",
1921                                           fname, (unsigned int)new_unx_mode));
1922                                 ret = 0; /* Don't do the fchmod below. */
1923                         }
1924                 }
1925
1926                 if ((ret == -1) &&
1927                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1928                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1929                                   "attributes of file %s to 0%o\n",
1930                                   fname, (unsigned int)new_unx_mode));
1931         }
1932
1933         /* If this is a successful open, we must remove any deferred open
1934          * records. */
1935         if (req != NULL) {
1936                 del_deferred_open_entry(lck, req->mid);
1937         }
1938         TALLOC_FREE(lck);
1939
1940         conn->num_files_open++;
1941
1942         *result = fsp;
1943         return NT_STATUS_OK;
1944 }
1945
1946 /****************************************************************************
1947  Open a file for for write to ensure that we can fchmod it.
1948 ****************************************************************************/
1949
1950 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1951                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1952 {
1953         files_struct *fsp = NULL;
1954         NTSTATUS status;
1955
1956         if (!VALID_STAT(*psbuf)) {
1957                 return NT_STATUS_INVALID_PARAMETER;
1958         }
1959
1960         status = file_new(conn, &fsp);
1961         if(!NT_STATUS_IS_OK(status)) {
1962                 return status;
1963         }
1964
1965         /* note! we must use a non-zero desired access or we don't get
1966            a real file descriptor. Oh what a twisted web we weave. */
1967         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1968                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1969
1970         /*
1971          * This is not a user visible file open.
1972          * Don't set a share mode and don't increment
1973          * the conn->num_files_open.
1974          */
1975
1976         if (!NT_STATUS_IS_OK(status)) {
1977                 file_free(fsp);
1978                 return status;
1979         }
1980
1981         *result = fsp;
1982         return NT_STATUS_OK;
1983 }
1984
1985 /****************************************************************************
1986  Close the fchmod file fd - ensure no locks are lost.
1987 ****************************************************************************/
1988
1989 NTSTATUS close_file_fchmod(files_struct *fsp)
1990 {
1991         NTSTATUS status = fd_close(fsp);
1992         file_free(fsp);
1993         return status;
1994 }
1995
1996 static NTSTATUS mkdir_internal(connection_struct *conn,
1997                                 const char *name,
1998                                 uint32 file_attributes,
1999                                 SMB_STRUCT_STAT *psbuf)
2000 {
2001         mode_t mode;
2002         char *parent_dir;
2003         const char *dirname;
2004         NTSTATUS status;
2005         bool posix_open = false;
2006
2007         if(!CAN_WRITE(conn)) {
2008                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2009                          "%s\n", lp_servicename(SNUM(conn))));
2010                 return NT_STATUS_ACCESS_DENIED;
2011         }
2012
2013         status = check_name(conn, name);
2014         if (!NT_STATUS_IS_OK(status)) {
2015                 return status;
2016         }
2017
2018         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2019                                    &dirname)) {
2020                 return NT_STATUS_NO_MEMORY;
2021         }
2022
2023         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2024                 posix_open = true;
2025                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2026         } else {
2027                 mode = unix_mode(conn, aDIR, name, parent_dir);
2028         }
2029
2030         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2031                 return map_nt_error_from_unix(errno);
2032         }
2033
2034         /* Ensure we're checking for a symlink here.... */
2035         /* We don't want to get caught by a symlink racer. */
2036
2037         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2038                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2039                           name, strerror(errno)));
2040                 return map_nt_error_from_unix(errno);
2041         }
2042
2043         if (!S_ISDIR(psbuf->st_mode)) {
2044                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2045                           name));
2046                 return NT_STATUS_ACCESS_DENIED;
2047         }
2048
2049         if (lp_store_dos_attributes(SNUM(conn))) {
2050                 if (!posix_open) {
2051                         file_set_dosmode(conn, name,
2052                                  file_attributes | aDIR, NULL,
2053                                  parent_dir,
2054                                  true);
2055                 }
2056         }
2057
2058         if (lp_inherit_perms(SNUM(conn))) {
2059                 inherit_access_posix_acl(conn, parent_dir, name, mode);
2060         }
2061
2062         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2063                 /*
2064                  * Check if high bits should have been set,
2065                  * then (if bits are missing): add them.
2066                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2067                  * dir.
2068                  */
2069                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2070                         SMB_VFS_CHMOD(conn, name,
2071                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2072                 }
2073         }
2074
2075         /* Change the owner if required. */
2076         if (lp_inherit_owner(SNUM(conn))) {
2077                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2078         }
2079
2080         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2081                      name);
2082
2083         return NT_STATUS_OK;
2084 }
2085
2086 /****************************************************************************
2087  Open a directory from an NT SMB call.
2088 ****************************************************************************/
2089
2090 NTSTATUS open_directory(connection_struct *conn,
2091                         struct smb_request *req,
2092                         const char *fname,
2093                         SMB_STRUCT_STAT *psbuf,
2094                         uint32 access_mask,
2095                         uint32 share_access,
2096                         uint32 create_disposition,
2097                         uint32 create_options,
2098                         uint32 file_attributes,
2099                         int *pinfo,
2100                         files_struct **result)
2101 {
2102         files_struct *fsp = NULL;
2103         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2104         struct share_mode_lock *lck = NULL;
2105         NTSTATUS status;
2106         struct timespec mtimespec;
2107         int info = 0;
2108
2109         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2110                  "share_access = 0x%x create_options = 0x%x, "
2111                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2112                  fname,
2113                  (unsigned int)access_mask,
2114                  (unsigned int)share_access,
2115                  (unsigned int)create_options,
2116                  (unsigned int)create_disposition,
2117                  (unsigned int)file_attributes));
2118
2119         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) && is_ntfs_stream_name(fname)) {
2120                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2121                 return NT_STATUS_NOT_A_DIRECTORY;
2122         }
2123
2124         switch( create_disposition ) {
2125                 case FILE_OPEN:
2126
2127                         info = FILE_WAS_OPENED;
2128
2129                         /*
2130                          * We want to follow symlinks here.
2131                          */
2132
2133                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2134                                 return map_nt_error_from_unix(errno);
2135                         }
2136
2137                         break;
2138
2139                 case FILE_CREATE:
2140
2141                         /* If directory exists error. If directory doesn't
2142                          * exist create. */
2143
2144                         status = mkdir_internal(conn,
2145                                                 fname,
2146                                                 file_attributes,
2147                                                 psbuf);
2148
2149                         if (!NT_STATUS_IS_OK(status)) {
2150                                 DEBUG(2, ("open_directory: unable to create "
2151                                           "%s. Error was %s\n", fname,
2152                                           nt_errstr(status)));
2153                                 return status;
2154                         }
2155
2156                         info = FILE_WAS_CREATED;
2157                         break;
2158
2159                 case FILE_OPEN_IF:
2160                         /*
2161                          * If directory exists open. If directory doesn't
2162                          * exist create.
2163                          */
2164
2165                         status = mkdir_internal(conn,
2166                                                 fname,
2167                                                 file_attributes,
2168                                                 psbuf);
2169
2170                         if (NT_STATUS_IS_OK(status)) {
2171                                 info = FILE_WAS_CREATED;
2172                         }
2173
2174                         if (NT_STATUS_EQUAL(status,
2175                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2176                                 info = FILE_WAS_OPENED;
2177                                 status = NT_STATUS_OK;
2178                         }
2179
2180                         break;
2181
2182                 case FILE_SUPERSEDE:
2183                 case FILE_OVERWRITE:
2184                 case FILE_OVERWRITE_IF:
2185                 default:
2186                         DEBUG(5,("open_directory: invalid create_disposition "
2187                                  "0x%x for directory %s\n",
2188                                  (unsigned int)create_disposition, fname));
2189                         return NT_STATUS_INVALID_PARAMETER;
2190         }
2191
2192         if(!S_ISDIR(psbuf->st_mode)) {
2193                 DEBUG(5,("open_directory: %s is not a directory !\n",
2194                          fname ));
2195                 return NT_STATUS_NOT_A_DIRECTORY;
2196         }
2197
2198         status = file_new(conn, &fsp);
2199         if(!NT_STATUS_IS_OK(status)) {
2200                 return status;
2201         }
2202
2203         /*
2204          * Setup the files_struct for it.
2205          */
2206
2207         fsp->mode = psbuf->st_mode;
2208         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2209         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2210         fsp->file_pid = req ? req->smbpid : 0;
2211         fsp->can_lock = False;
2212         fsp->can_read = False;
2213         fsp->can_write = False;
2214
2215         fsp->share_access = share_access;
2216         fsp->fh->private_options = create_options;
2217         fsp->access_mask = access_mask;
2218
2219         fsp->print_file = False;
2220         fsp->modified = False;
2221         fsp->oplock_type = NO_OPLOCK;
2222         fsp->sent_oplock_break = NO_BREAK_SENT;
2223         fsp->is_directory = True;
2224         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2225
2226         string_set(&fsp->fsp_name,fname);
2227
2228         mtimespec = get_mtimespec(psbuf);
2229
2230         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2231                                   conn->connectpath,
2232                                   fname, &mtimespec);
2233
2234         if (lck == NULL) {
2235                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2236                 file_free(fsp);
2237                 return NT_STATUS_SHARING_VIOLATION;
2238         }
2239
2240         status = open_mode_check(conn, fname, lck,
2241                                 access_mask, share_access,
2242                                 create_options, &dir_existed);
2243
2244         if (!NT_STATUS_IS_OK(status)) {
2245                 TALLOC_FREE(lck);
2246                 file_free(fsp);
2247                 return status;
2248         }
2249
2250         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2251                        True);
2252
2253         /* For directories the delete on close bit at open time seems
2254            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2255         if (create_options & FILE_DELETE_ON_CLOSE) {
2256                 status = can_set_delete_on_close(fsp, True, 0);
2257                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2258                         TALLOC_FREE(lck);
2259                         file_free(fsp);
2260                         return status;
2261                 }
2262
2263                 if (NT_STATUS_IS_OK(status)) {
2264                         /* Note that here we set the *inital* delete on close flag,
2265                            not the regular one. The magic gets handled in close. */
2266                         fsp->initial_delete_on_close = True;
2267                 }
2268         }
2269
2270         TALLOC_FREE(lck);
2271
2272         if (pinfo) {
2273                 *pinfo = info;
2274         }
2275
2276         conn->num_files_open++;
2277
2278         *result = fsp;
2279         return NT_STATUS_OK;
2280 }
2281
2282 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2283 {
2284         NTSTATUS status;
2285         SMB_STRUCT_STAT sbuf;
2286         files_struct *fsp;
2287
2288         SET_STAT_INVALID(sbuf);
2289
2290         status = open_directory(conn, req, directory, &sbuf,
2291                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2292                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2293                                 FILE_CREATE,
2294                                 0,
2295                                 FILE_ATTRIBUTE_DIRECTORY,
2296                                 NULL,
2297                                 &fsp);
2298
2299         if (NT_STATUS_IS_OK(status)) {
2300                 close_file(fsp, NORMAL_CLOSE);
2301         }
2302
2303         return status;
2304 }
2305
2306 /****************************************************************************
2307  Receive notification that one of our open files has been renamed by another
2308  smbd process.
2309 ****************************************************************************/
2310
2311 void msg_file_was_renamed(struct messaging_context *msg,
2312                           void *private_data,
2313                           uint32_t msg_type,
2314                           struct server_id server_id,
2315                           DATA_BLOB *data)
2316 {
2317         files_struct *fsp;
2318         char *frm = (char *)data->data;
2319         struct file_id id;
2320         const char *sharepath;
2321         const char *newname;
2322         size_t sp_len;
2323
2324         if (data->data == NULL
2325             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2326                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2327                           (int)data->length));
2328                 return;
2329         }
2330
2331         /* Unpack the message. */
2332         pull_file_id_16(frm, &id);
2333         sharepath = &frm[16];
2334         newname = sharepath + strlen(sharepath) + 1;
2335         sp_len = strlen(sharepath);
2336
2337         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2338                 "file_id %s\n",
2339                   sharepath, newname, file_id_string_tos(&id)));
2340
2341         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2342                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2343                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2344                                 fsp->fnum, fsp->fsp_name, newname ));
2345                         string_set(&fsp->fsp_name, newname);
2346                 } else {
2347                         /* TODO. JRA. */
2348                         /* Now we have the complete path we can work out if this is
2349                            actually within this share and adjust newname accordingly. */
2350                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2351                                 "not sharepath %s) "
2352                                 "fnum %d from %s -> %s\n",
2353                                 fsp->conn->connectpath,
2354                                 sharepath,
2355                                 fsp->fnum,
2356                                 fsp->fsp_name,
2357                                 newname ));
2358                 }
2359         }
2360 }
2361
2362 struct case_semantics_state {
2363         connection_struct *conn;
2364         bool case_sensitive;
2365         bool case_preserve;
2366         bool short_case_preserve;
2367 };
2368
2369 /****************************************************************************
2370  Restore case semantics.
2371 ****************************************************************************/
2372 static int restore_case_semantics(struct case_semantics_state *state)
2373 {
2374         state->conn->case_sensitive = state->case_sensitive;
2375         state->conn->case_preserve = state->case_preserve;
2376         state->conn->short_case_preserve = state->short_case_preserve;
2377         return 0;
2378 }
2379
2380 /****************************************************************************
2381  Save case semantics.
2382 ****************************************************************************/
2383 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2384                                                              connection_struct *conn)
2385 {
2386         struct case_semantics_state *result;
2387
2388         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2389                 DEBUG(0, ("talloc failed\n"));
2390                 return NULL;
2391         }
2392
2393         result->conn = conn;
2394         result->case_sensitive = conn->case_sensitive;
2395         result->case_preserve = conn->case_preserve;
2396         result->short_case_preserve = conn->short_case_preserve;
2397
2398         /* Set to POSIX. */
2399         conn->case_sensitive = True;
2400         conn->case_preserve = True;
2401         conn->short_case_preserve = True;
2402
2403         talloc_set_destructor(result, restore_case_semantics);
2404
2405         return result;
2406 }
2407
2408 /*
2409  * If a main file is opened for delete, all streams need to be checked for
2410  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2411  * If that works, delete them all by setting the delete on close and close.
2412  */
2413
2414 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2415                                         const char *fname)
2416 {
2417         struct stream_struct *stream_info;
2418         files_struct **streams;
2419         int i;
2420         unsigned int num_streams;
2421         TALLOC_CTX *frame = talloc_stackframe();
2422         NTSTATUS status;
2423
2424         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2425                                     &num_streams, &stream_info);
2426
2427         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2428             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2429                 DEBUG(10, ("no streams around\n"));
2430                 TALLOC_FREE(frame);
2431                 return NT_STATUS_OK;
2432         }
2433
2434         if (!NT_STATUS_IS_OK(status)) {
2435                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2436                            nt_errstr(status)));
2437                 goto fail;
2438         }
2439
2440         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2441                    num_streams));
2442
2443         if (num_streams == 0) {
2444                 TALLOC_FREE(frame);
2445                 return NT_STATUS_OK;
2446         }
2447
2448         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2449         if (streams == NULL) {
2450                 DEBUG(0, ("talloc failed\n"));
2451                 status = NT_STATUS_NO_MEMORY;
2452                 goto fail;
2453         }
2454
2455         for (i=0; i<num_streams; i++) {
2456                 char *streamname;
2457
2458                 if (strequal(stream_info[i].name, "::$DATA")) {
2459                         streams[i] = NULL;
2460                         continue;
2461                 }
2462
2463                 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2464                                              stream_info[i].name);
2465
2466                 if (streamname == NULL) {
2467                         DEBUG(0, ("talloc_aprintf failed\n"));
2468                         status = NT_STATUS_NO_MEMORY;
2469                         goto fail;
2470                 }
2471
2472                 status = create_file_unixpath
2473                         (conn,                  /* conn */
2474                          NULL,                  /* req */
2475                          streamname,            /* fname */
2476                          DELETE_ACCESS,         /* access_mask */
2477                          FILE_SHARE_READ | FILE_SHARE_WRITE
2478                          | FILE_SHARE_DELETE,   /* share_access */
2479                          FILE_OPEN,             /* create_disposition*/
2480                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2481                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2482                          0,                     /* oplock_request */
2483                          0,                     /* allocation_size */
2484                          NULL,                  /* sd */
2485                          NULL,                  /* ea_list */
2486                          &streams[i],           /* result */
2487                          NULL,                  /* pinfo */
2488                          NULL);                 /* psbuf */
2489
2490                 TALLOC_FREE(streamname);
2491
2492                 if (!NT_STATUS_IS_OK(status)) {
2493                         DEBUG(10, ("Could not open stream %s: %s\n",
2494                                    streamname, nt_errstr(status)));
2495                         break;
2496                 }
2497         }
2498
2499         /*
2500          * don't touch the variable "status" beyond this point :-)
2501          */
2502
2503         for (i -= 1 ; i >= 0; i--) {
2504                 if (streams[i] == NULL) {
2505                         continue;
2506                 }
2507
2508                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2509                            streams[i]->fsp_name));
2510                 close_file(streams[i], NORMAL_CLOSE);
2511         }
2512
2513  fail:
2514         TALLOC_FREE(frame);
2515         return status;
2516 }
2517
2518 /*
2519  * Wrapper around open_file_ntcreate and open_directory
2520  */
2521
2522 NTSTATUS create_file_unixpath(connection_struct *conn,
2523                               struct smb_request *req,
2524                               const char *fname,
2525                               uint32_t access_mask,
2526                               uint32_t share_access,
2527                               uint32_t create_disposition,
2528                               uint32_t create_options,
2529                               uint32_t file_attributes,
2530                               uint32_t oplock_request,
2531                               SMB_BIG_UINT allocation_size,
2532                               struct security_descriptor *sd,
2533                               struct ea_list *ea_list,
2534
2535                               files_struct **result,
2536                               int *pinfo,
2537                               SMB_STRUCT_STAT *psbuf)
2538 {
2539         SMB_STRUCT_STAT sbuf;
2540         int info = FILE_WAS_OPENED;
2541         files_struct *base_fsp = NULL;
2542         files_struct *fsp = NULL;
2543         NTSTATUS status;
2544
2545         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2546                   "file_attributes = 0x%x, share_access = 0x%x, "
2547                   "create_disposition = 0x%x create_options = 0x%x "
2548                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2549                   "fname = %s\n",
2550                   (unsigned int)access_mask,
2551                   (unsigned int)file_attributes,
2552                   (unsigned int)share_access,
2553                   (unsigned int)create_disposition,
2554                   (unsigned int)create_options,
2555                   (unsigned int)oplock_request,
2556                   ea_list, sd, fname));
2557
2558         if (create_options & FILE_OPEN_BY_FILE_ID) {
2559                 status = NT_STATUS_NOT_SUPPORTED;
2560                 goto fail;
2561         }
2562
2563         if (req == NULL) {
2564                 oplock_request |= INTERNAL_OPEN_ONLY;
2565         }
2566
2567         if (psbuf != NULL) {
2568                 sbuf = *psbuf;
2569         }
2570         else {
2571                 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2572                         SET_STAT_INVALID(sbuf);
2573                 }
2574         }
2575
2576         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2577             && (access_mask & DELETE_ACCESS)
2578             && !is_ntfs_stream_name(fname)) {
2579                 /*
2580                  * We can't open a file with DELETE access if any of the
2581                  * streams is open without FILE_SHARE_DELETE
2582                  */
2583                 status = open_streams_for_delete(conn, fname);
2584
2585                 if (!NT_STATUS_IS_OK(status)) {
2586                         goto fail;
2587                 }
2588         }
2589
2590         /* This is the correct thing to do (check every time) but can_delete
2591          * is expensive (it may have to read the parent directory
2592          * permissions). So for now we're not doing it unless we have a strong
2593          * hint the client is really going to delete this file. If the client
2594          * is forcing FILE_CREATE let the filesystem take care of the
2595          * permissions. */
2596
2597         /* Setting FILE_SHARE_DELETE is the hint. */
2598
2599         if (lp_acl_check_permissions(SNUM(conn))
2600             && (create_disposition != FILE_CREATE)
2601             && (share_access & FILE_SHARE_DELETE)
2602             && (access_mask & DELETE_ACCESS)
2603             && (((dos_mode(conn, fname, &sbuf) & FILE_ATTRIBUTE_READONLY)
2604                  && !lp_delete_readonly(SNUM(conn)))
2605                 || !can_delete_file_in_directory(conn, fname))) {
2606                 status = NT_STATUS_ACCESS_DENIED;
2607                 goto fail;
2608         }
2609
2610 #if 0
2611         /* We need to support SeSecurityPrivilege for this. */
2612         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2613             !user_has_privileges(current_user.nt_user_token,
2614                                  &se_security)) {
2615                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2616                 goto fail;
2617         }
2618 #endif
2619
2620         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2621             && is_ntfs_stream_name(fname)
2622             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2623                 char *base;
2624                 uint32 base_create_disposition;
2625
2626                 if (create_options & FILE_DIRECTORY_FILE) {
2627                         status = NT_STATUS_NOT_A_DIRECTORY;
2628                         goto fail;
2629                 }
2630
2631                 status = split_ntfs_stream_name(talloc_tos(), fname,
2632                                                 &base, NULL);
2633                 if (!NT_STATUS_IS_OK(status)) {
2634                         DEBUG(10, ("create_file_unixpath: "
2635                                 "split_ntfs_stream_name failed: %s\n",
2636                                 nt_errstr(status)));
2637                         goto fail;
2638                 }
2639
2640                 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2641
2642                 switch (create_disposition) {
2643                 case FILE_OPEN:
2644                         base_create_disposition = FILE_OPEN;
2645                         break;
2646                 default:
2647                         base_create_disposition = FILE_OPEN_IF;
2648                         break;
2649                 }
2650
2651                 status = create_file_unixpath(conn, NULL, base, 0,
2652                                               FILE_SHARE_READ
2653                                               | FILE_SHARE_WRITE
2654                                               | FILE_SHARE_DELETE,
2655                                               base_create_disposition,
2656                                               0, 0, 0, 0, NULL, NULL,
2657                                               &base_fsp, NULL, NULL);
2658                 if (!NT_STATUS_IS_OK(status)) {
2659                         DEBUG(10, ("create_file_unixpath for base %s failed: "
2660                                    "%s\n", base, nt_errstr(status)));
2661                         goto fail;
2662                 }
2663         }
2664
2665         /*
2666          * If it's a request for a directory open, deal with it separately.
2667          */
2668
2669         if (create_options & FILE_DIRECTORY_FILE) {
2670
2671                 if (create_options & FILE_NON_DIRECTORY_FILE) {
2672                         status = NT_STATUS_INVALID_PARAMETER;
2673                         goto fail;
2674                 }
2675
2676                 /* Can't open a temp directory. IFS kit test. */
2677                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2678                         status = NT_STATUS_INVALID_PARAMETER;
2679                         goto fail;
2680                 }
2681
2682                 /*
2683                  * We will get a create directory here if the Win32
2684                  * app specified a security descriptor in the
2685                  * CreateDirectory() call.
2686                  */
2687
2688                 oplock_request = 0;
2689                 status = open_directory(
2690                         conn, req, fname, &sbuf, access_mask, share_access,
2691                         create_disposition, create_options, file_attributes,
2692                         &info, &fsp);
2693         } else {
2694
2695                 /*
2696                  * Ordinary file case.
2697                  */
2698
2699                 status = open_file_ntcreate(
2700                         conn, req, fname, &sbuf, access_mask, share_access,
2701                         create_disposition, create_options, file_attributes,
2702                         oplock_request, &info, &fsp);
2703
2704                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2705
2706                         /*
2707                          * Fail the open if it was explicitly a non-directory
2708                          * file.
2709                          */
2710
2711                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2712                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2713                                 goto fail;
2714                         }
2715
2716                         oplock_request = 0;
2717                         status = open_directory(
2718                                 conn, req, fname, &sbuf, access_mask,
2719                                 share_access, create_disposition,
2720                                 create_options, file_attributes,
2721                                 &info, &fsp);
2722                 }
2723         }
2724
2725         if (!NT_STATUS_IS_OK(status)) {
2726                 goto fail;
2727         }
2728
2729         /*
2730          * According to the MS documentation, the only time the security
2731          * descriptor is applied to the opened file is iff we *created* the
2732          * file; an existing file stays the same.
2733          *
2734          * Also, it seems (from observation) that you can open the file with
2735          * any access mask but you can still write the sd. We need to override
2736          * the granted access before we call set_sd
2737          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2738          */
2739
2740         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2741             && lp_nt_acl_support(SNUM(conn))) {
2742
2743                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2744                 uint32_t saved_access_mask = fsp->access_mask;
2745
2746                 if (sd->owner_sid == NULL) {
2747                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2748                 }
2749                 if (sd->group_sid == NULL) {
2750                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2751                 }
2752                 if (sd->sacl == NULL) {
2753                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2754                 }
2755                 if (sd->dacl == NULL) {
2756                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2757                 }
2758
2759                 fsp->access_mask = FILE_GENERIC_ALL;
2760
2761                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2762
2763                 fsp->access_mask = saved_access_mask;
2764
2765                 if (!NT_STATUS_IS_OK(status)) {
2766                         goto fail;
2767                 }
2768         }
2769
2770         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2771                 status = set_ea(conn, fsp, fname, ea_list);
2772                 if (!NT_STATUS_IS_OK(status)) {
2773                         goto fail;
2774                 }
2775         }
2776
2777         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2778                 status = NT_STATUS_ACCESS_DENIED;
2779                 goto fail;
2780         }
2781
2782         /* Save the requested allocation size. */
2783         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2784                 if (allocation_size
2785                     && (allocation_size > sbuf.st_size)) {
2786                         fsp->initial_allocation_size = smb_roundup(
2787                                 fsp->conn, allocation_size);
2788                         if (fsp->is_directory) {
2789                                 /* Can't set allocation size on a directory. */
2790                                 status = NT_STATUS_ACCESS_DENIED;
2791                                 goto fail;
2792                         }
2793                         if (vfs_allocate_file_space(
2794                                     fsp, fsp->initial_allocation_size) == -1) {
2795                                 status = NT_STATUS_DISK_FULL;
2796                                 goto fail;
2797                         }
2798                 } else {
2799                         fsp->initial_allocation_size = smb_roundup(
2800                                 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2801                 }
2802         }
2803
2804         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2805
2806         /*
2807          * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2808          * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2809          * also close fsp->base_fsp which we have to also do explicitly in
2810          * this routine here, as not in all "goto fail:" we have the fsp set
2811          * up already to be initialized with the base_fsp.
2812          */
2813
2814         fsp->base_fsp = base_fsp;
2815
2816         *result = fsp;
2817         if (pinfo != NULL) {
2818                 *pinfo = info;
2819         }
2820         if (psbuf != NULL) {
2821                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2822                         *psbuf = sbuf;
2823                 }
2824                 else {
2825                         SMB_VFS_FSTAT(fsp, psbuf);
2826                 }
2827         }
2828         return NT_STATUS_OK;
2829
2830  fail:
2831         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2832
2833         if (fsp != NULL) {
2834                 close_file(fsp, ERROR_CLOSE);
2835                 fsp = NULL;
2836         }
2837         if (base_fsp != NULL) {
2838                 close_file(base_fsp, ERROR_CLOSE);
2839                 base_fsp = NULL;
2840         }
2841         return status;
2842 }
2843
2844 NTSTATUS create_file(connection_struct *conn,
2845                      struct smb_request *req,
2846                      uint16_t root_dir_fid,
2847                      const char *fname,
2848                      uint32_t access_mask,
2849                      uint32_t share_access,
2850                      uint32_t create_disposition,
2851                      uint32_t create_options,
2852                      uint32_t file_attributes,
2853                      uint32_t oplock_request,
2854                      SMB_BIG_UINT allocation_size,
2855                      struct security_descriptor *sd,
2856                      struct ea_list *ea_list,
2857
2858                      files_struct **result,
2859                      int *pinfo,
2860                      SMB_STRUCT_STAT *psbuf)
2861 {
2862         struct case_semantics_state *case_state = NULL;
2863         SMB_STRUCT_STAT sbuf;
2864         int info = FILE_WAS_OPENED;
2865         files_struct *fsp = NULL;
2866         NTSTATUS status;
2867
2868         DEBUG(10,("create_file: access_mask = 0x%x "
2869                   "file_attributes = 0x%x, share_access = 0x%x, "
2870                   "create_disposition = 0x%x create_options = 0x%x "
2871                   "oplock_request = 0x%x "
2872                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2873                   "fname = %s\n",
2874                   (unsigned int)access_mask,
2875                   (unsigned int)file_attributes,
2876                   (unsigned int)share_access,
2877                   (unsigned int)create_disposition,
2878                   (unsigned int)create_options,
2879                   (unsigned int)oplock_request,
2880                   (unsigned int)root_dir_fid,
2881                   ea_list, sd, fname));
2882
2883         /*
2884          * Get the file name.
2885          */
2886
2887         if (root_dir_fid != 0) {
2888                 /*
2889                  * This filename is relative to a directory fid.
2890                  */
2891                 char *parent_fname = NULL;
2892                 files_struct *dir_fsp = file_fsp(root_dir_fid);
2893
2894                 if (dir_fsp == NULL) {
2895                         status = NT_STATUS_INVALID_HANDLE;
2896                         goto fail;
2897                 }
2898
2899                 if (!dir_fsp->is_directory) {
2900
2901                         /*
2902                          * Check to see if this is a mac fork of some kind.
2903                          */
2904
2905                         if (is_ntfs_stream_name(fname)) {
2906                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2907                                 goto fail;
2908                         }
2909
2910                         /*
2911                           we need to handle the case when we get a
2912                           relative open relative to a file and the
2913                           pathname is blank - this is a reopen!
2914                           (hint from demyn plantenberg)
2915                         */
2916
2917                         status = NT_STATUS_INVALID_HANDLE;
2918                         goto fail;
2919                 }
2920
2921                 if (ISDOT(dir_fsp->fsp_name)) {
2922                         /*
2923                          * We're at the toplevel dir, the final file name
2924                          * must not contain ./, as this is filtered out
2925                          * normally by srvstr_get_path and unix_convert
2926                          * explicitly rejects paths containing ./.
2927                          */
2928                         parent_fname = talloc_strdup(talloc_tos(), "");
2929                         if (parent_fname == NULL) {
2930                                 status = NT_STATUS_NO_MEMORY;
2931                                 goto fail;
2932                         }
2933                 } else {
2934                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2935
2936                         /*
2937                          * Copy in the base directory name.
2938                          */
2939
2940                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2941                                                     dir_name_len+2);
2942                         if (parent_fname == NULL) {
2943                                 status = NT_STATUS_NO_MEMORY;
2944                                 goto fail;
2945                         }
2946                         memcpy(parent_fname, dir_fsp->fsp_name,
2947                                dir_name_len+1);
2948
2949                         /*
2950                          * Ensure it ends in a '/'.
2951                          * We used TALLOC_SIZE +2 to add space for the '/'.
2952                          */
2953
2954                         if(dir_name_len
2955                            && (parent_fname[dir_name_len-1] != '\\')
2956                            && (parent_fname[dir_name_len-1] != '/')) {
2957                                 parent_fname[dir_name_len] = '/';
2958                                 parent_fname[dir_name_len+1] = '\0';
2959                         }
2960                 }
2961
2962                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2963                                         fname);
2964                 if (fname == NULL) {
2965                         status = NT_STATUS_NO_MEMORY;
2966                         goto fail;
2967                 }
2968         }
2969
2970         /*
2971          * Check to see if this is a mac fork of some kind.
2972          */
2973
2974         if (is_ntfs_stream_name(fname)) {
2975                 enum FAKE_FILE_TYPE fake_file_type;
2976
2977                 fake_file_type = is_fake_file(fname);
2978
2979                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
2980
2981                         /*
2982                          * Here we go! support for changing the disk quotas
2983                          * --metze
2984                          *
2985                          * We need to fake up to open this MAGIC QUOTA file
2986                          * and return a valid FID.
2987                          *
2988                          * w2k close this file directly after openening xp
2989                          * also tries a QUERY_FILE_INFO on the file and then
2990                          * close it
2991                          */
2992                         status = open_fake_file(conn, req->vuid,
2993                                                 fake_file_type, fname,
2994                                                 access_mask, &fsp);
2995                         if (!NT_STATUS_IS_OK(status)) {
2996                                 goto fail;
2997                         }
2998
2999                         ZERO_STRUCT(sbuf);
3000                         goto done;
3001                 }
3002         }
3003
3004         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3005                 char *resolved_fname;
3006
3007                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3008                                          &resolved_fname);
3009
3010                 if (!NT_STATUS_IS_OK(status)) {
3011                         /*
3012                          * For PATH_NOT_COVERED we had
3013                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3014                          *                 ERRSRV, ERRbadpath);
3015                          * Need to fix in callers
3016                          */
3017                         goto fail;
3018                 }
3019                 fname = resolved_fname;
3020         }
3021
3022         /*
3023          * Check if POSIX semantics are wanted.
3024          */
3025
3026         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3027                 case_state = set_posix_case_semantics(talloc_tos(), conn);
3028                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3029         }
3030
3031         {
3032                 char *converted_fname;
3033
3034                 SET_STAT_INVALID(sbuf);
3035
3036                 status = unix_convert(talloc_tos(), conn, fname, False,
3037                                       &converted_fname, NULL, &sbuf);
3038                 if (!NT_STATUS_IS_OK(status)) {
3039                         goto fail;
3040                 }
3041                 fname = converted_fname;
3042         }
3043
3044         TALLOC_FREE(case_state);
3045
3046         /* All file access must go through check_name() */
3047
3048         status = check_name(conn, fname);
3049         if (!NT_STATUS_IS_OK(status)) {
3050                 goto fail;
3051         }
3052
3053         status = create_file_unixpath(
3054                 conn, req, fname, access_mask, share_access,
3055                 create_disposition, create_options, file_attributes,
3056                 oplock_request, allocation_size, sd, ea_list,
3057                 &fsp, &info, &sbuf);
3058
3059         if (!NT_STATUS_IS_OK(status)) {
3060                 goto fail;
3061         }
3062
3063  done:
3064         DEBUG(10, ("create_file: info=%d\n", info));
3065
3066         *result = fsp;
3067         if (pinfo != NULL) {
3068                 *pinfo = info;
3069         }
3070         if (psbuf != NULL) {
3071                 *psbuf = sbuf;
3072         }
3073         return NT_STATUS_OK;
3074
3075  fail:
3076         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3077
3078         if (fsp != NULL) {
3079                 close_file(fsp, ERROR_CLOSE);
3080                 fsp = NULL;
3081         }
3082         return status;
3083 }