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(struct smb_request *req,
 894                                      connection_struct *conn,
 895                                      const char *fname,
 896                                      struct file_id id,
 897                                      uint16 file_pid,
 898                                      uint16 vuid,
 899                                      uint32 access_mask,
 900                                      uint32 share_access,
 901                                      uint32 create_options)
 902 {
 903         files_struct *fsp;
 904         files_struct *dup_fsp;
 905
 906         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 907                  "file %s.\n", fname ));
 908
 909         for(fsp = file_find_di_first(id); fsp;
 910             fsp = file_find_di_next(fsp)) {
 911
 912                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 913                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 914                           "access_mask = 0x%x\n", fsp->fsp_name,
 915                           fsp->fh->fd, (unsigned int)fsp->vuid,
 916                           (unsigned int)fsp->file_pid,
 917                           (unsigned int)fsp->fh->private_options,
 918                           (unsigned int)fsp->access_mask ));
 919
 920                 if (fsp->fh->fd != -1 &&
 921                     fsp->vuid == vuid &&
 922                     fsp->file_pid == file_pid &&
 923                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 924                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 925                     (fsp->access_mask & FILE_WRITE_DATA) &&
 926                     strequal(fsp->fsp_name, fname)) {
 927                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 928                         break;
 929                 }
 930         }
 931
 932         if (!fsp) {
 933                 return NULL;
 934         }
 935
 936         /* quite an insane set of semantics ... */
 937         if (is_executable(fname) &&
 938             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 939                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 940                 return NULL;
 941         }
 942
 943         /* We need to duplicate this fsp. */
 944         if (!NT_STATUS_IS_OK(dup_file_fsp(req, fsp, access_mask, share_access,
 945                                           create_options, &dup_fsp))) {
 946                 return NULL;
 947         }
 948
 949         return dup_fsp;
 950 }
 951
 952 /****************************************************************************
 953  Open a file with a share mode - old openX method - map into NTCreate.
 954 ****************************************************************************/
 955
 956 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 957                                  uint32 *paccess_mask,
 958                                  uint32 *pshare_mode,
 959                                  uint32 *pcreate_disposition,
 960                                  uint32 *pcreate_options)
 961 {
 962         uint32 access_mask;
 963         uint32 share_mode;
 964         uint32 create_disposition;
 965         uint32 create_options = 0;
 966
 967         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 968                   "open_func = 0x%x\n",
 969                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 970
 971         /* Create the NT compatible access_mask. */
 972         switch (GET_OPENX_MODE(deny_mode)) {
 973                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 974                 case DOS_OPEN_RDONLY:
 975                         access_mask = FILE_GENERIC_READ;
 976                         break;
 977                 case DOS_OPEN_WRONLY:
 978                         access_mask = FILE_GENERIC_WRITE;
 979                         break;
 980                 case DOS_OPEN_RDWR:
 981                 case DOS_OPEN_FCB:
 982                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 983                         break;
 984                 default:
 985                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 986                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 987                         return False;
 988         }
 989
 990         /* Create the NT compatible create_disposition. */
 991         switch (open_func) {
 992                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 993                         create_disposition = FILE_CREATE;
 994                         break;
 995
 996                 case OPENX_FILE_EXISTS_OPEN:
 997                         create_disposition = FILE_OPEN;
 998                         break;
 999
1000                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1001                         create_disposition = FILE_OPEN_IF;
1002                         break;
1003
1004                 case OPENX_FILE_EXISTS_TRUNCATE:
1005                         create_disposition = FILE_OVERWRITE;
1006                         break;
1007
1008                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1009                         create_disposition = FILE_OVERWRITE_IF;
1010                         break;
1011
1012                 default:
1013                         /* From samba4 - to be confirmed. */
1014                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1015                                 create_disposition = FILE_CREATE;
1016                                 break;
1017                         }
1018                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1019                                   "open_func 0x%x\n", (unsigned int)open_func));
1020                         return False;
1021         }
1022
1023         /* Create the NT compatible share modes. */
1024         switch (GET_DENY_MODE(deny_mode)) {
1025                 case DENY_ALL:
1026                         share_mode = FILE_SHARE_NONE;
1027                         break;
1028
1029                 case DENY_WRITE:
1030                         share_mode = FILE_SHARE_READ;
1031                         break;
1032
1033                 case DENY_READ:
1034                         share_mode = FILE_SHARE_WRITE;
1035                         break;
1036
1037                 case DENY_NONE:
1038                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039                         break;
1040
1041                 case DENY_DOS:
1042                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1043                         if (is_executable(fname)) {
1044                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1045                         } else {
1046                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1047                                         share_mode = FILE_SHARE_READ;
1048                                 } else {
1049                                         share_mode = FILE_SHARE_NONE;
1050                                 }
1051                         }
1052                         break;
1053
1054                 case DENY_FCB:
1055                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1056                         share_mode = FILE_SHARE_NONE;
1057                         break;
1058
1059                 default:
1060                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1061                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1062                         return False;
1063         }
1064
1065         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1066                   "share_mode = 0x%x, create_disposition = 0x%x, "
1067                   "create_options = 0x%x\n",
1068                   fname,
1069                   (unsigned int)access_mask,
1070                   (unsigned int)share_mode,
1071                   (unsigned int)create_disposition,
1072                   (unsigned int)create_options ));
1073
1074         if (paccess_mask) {
1075                 *paccess_mask = access_mask;
1076         }
1077         if (pshare_mode) {
1078                 *pshare_mode = share_mode;
1079         }
1080         if (pcreate_disposition) {
1081                 *pcreate_disposition = create_disposition;
1082         }
1083         if (pcreate_options) {
1084                 *pcreate_options = create_options;
1085         }
1086
1087         return True;
1088
1089 }
1090
1091 static void schedule_defer_open(struct share_mode_lock *lck,
1092                                 struct timeval request_time,
1093                                 struct smb_request *req)
1094 {
1095         struct deferred_open_record state;
1096
1097         /* This is a relative time, added to the absolute
1098            request_time value to get the absolute timeout time.
1099            Note that if this is the second or greater time we enter
1100            this codepath for this particular request mid then
1101            request_time is left as the absolute time of the *first*
1102            time this request mid was processed. This is what allows
1103            the request to eventually time out. */
1104
1105         struct timeval timeout;
1106
1107         /* Normally the smbd we asked should respond within
1108          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1109          * the client did, give twice the timeout as a safety
1110          * measure here in case the other smbd is stuck
1111          * somewhere else. */
1112
1113         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1114
1115         /* Nothing actually uses state.delayed_for_oplocks
1116            but it's handy to differentiate in debug messages
1117            between a 30 second delay due to oplock break, and
1118            a 1 second delay for share mode conflicts. */
1119
1120         state.delayed_for_oplocks = True;
1121         state.id = lck->id;
1122
1123         if (!request_timed_out(request_time, timeout)) {
1124                 defer_open(lck, request_time, timeout, req, &state);
1125         }
1126 }
1127
1128 /****************************************************************************
1129  Open a file with a share mode.
1130 ****************************************************************************/
1131
1132 NTSTATUS open_file_ntcreate(connection_struct *conn,
1133                             struct smb_request *req,
1134                             const char *fname,
1135                             SMB_STRUCT_STAT *psbuf,
1136                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1137                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1138                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1139                             uint32 create_options,      /* options such as delete on close. */
1140                             uint32 new_dos_attributes,  /* attributes used for new file. */
1141                             int oplock_request,         /* internal Samba oplock codes. */
1142                                                         /* Information (FILE_EXISTS etc.) */
1143                             int *pinfo,
1144                             files_struct **result)
1145 {
1146         int flags=0;
1147         int flags2=0;
1148         bool file_existed = VALID_STAT(*psbuf);
1149         bool def_acl = False;
1150         bool posix_open = False;
1151         bool new_file_created = False;
1152         struct file_id id;
1153         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1154         files_struct *fsp = NULL;
1155         mode_t new_unx_mode = (mode_t)0;
1156         mode_t unx_mode = (mode_t)0;
1157         int info;
1158         uint32 existing_dos_attributes = 0;
1159         struct pending_message_list *pml = NULL;
1160         struct timeval request_time = timeval_zero();
1161         struct share_mode_lock *lck = NULL;
1162         uint32 open_access_mask = access_mask;
1163         NTSTATUS status;
1164         int ret_flock;
1165         char *parent_dir;
1166         const char *newname;
1167
1168         ZERO_STRUCT(id);
1169
1170         if (conn->printer) {
1171                 /*
1172                  * Printers are handled completely differently.
1173                  * Most of the passed parameters are ignored.
1174                  */
1175
1176                 if (pinfo) {
1177                         *pinfo = FILE_WAS_CREATED;
1178                 }
1179
1180                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1181
1182                 return print_fsp_open(req, conn, fname, req->vuid, result);
1183         }
1184
1185         if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1186                                    &newname)) {
1187                 return NT_STATUS_NO_MEMORY;
1188         }
1189
1190         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1191                 posix_open = True;
1192                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1193                 new_dos_attributes = 0;
1194         } else {
1195                 /* We add aARCH to this as this mode is only used if the file is
1196                  * created new. */
1197                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1198                                      parent_dir);
1199         }
1200
1201         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1202                    "access_mask=0x%x share_access=0x%x "
1203                    "create_disposition = 0x%x create_options=0x%x "
1204                    "unix mode=0%o oplock_request=%d\n",
1205                    fname, new_dos_attributes, access_mask, share_access,
1206                    create_disposition, create_options, unx_mode,
1207                    oplock_request));
1208
1209         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1210                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1211                 return NT_STATUS_INTERNAL_ERROR;
1212         }
1213
1214         /*
1215          * Only non-internal opens can be deferred at all
1216          */
1217
1218         if ((req != NULL)
1219             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1220                 struct deferred_open_record *state =
1221                         (struct deferred_open_record *)pml->private_data.data;
1222
1223                 /* Remember the absolute time of the original
1224                    request with this mid. We'll use it later to
1225                    see if this has timed out. */
1226
1227                 request_time = pml->request_time;
1228
1229                 /* Remove the deferred open entry under lock. */
1230                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1231                                           NULL);
1232                 if (lck == NULL) {
1233                         DEBUG(0, ("could not get share mode lock\n"));
1234                 } else {
1235                         del_deferred_open_entry(lck, req->mid);
1236                         TALLOC_FREE(lck);
1237                 }
1238
1239                 /* Ensure we don't reprocess this message. */
1240                 remove_deferred_open_smb_message(req->mid);
1241         }
1242
1243         status = check_name(conn, fname);
1244         if (!NT_STATUS_IS_OK(status)) {
1245                 return status;
1246         }
1247
1248         if (!posix_open) {
1249                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1250                 if (file_existed) {
1251                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1252                 }
1253         }
1254
1255         /* ignore any oplock requests if oplocks are disabled */
1256         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1257             IS_VETO_OPLOCK_PATH(conn, fname)) {
1258                 /* Mask off everything except the private Samba bits. */
1259                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1260         }
1261
1262         /* this is for OS/2 long file names - say we don't support them */
1263         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1264                 /* OS/2 Workplace shell fix may be main code stream in a later
1265                  * release. */
1266                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1267                          "supported.\n"));
1268                 if (use_nt_status()) {
1269                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1270                 }
1271                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1272         }
1273
1274         switch( create_disposition ) {
1275                 /*
1276                  * Currently we're using FILE_SUPERSEDE as the same as
1277                  * FILE_OVERWRITE_IF but they really are
1278                  * different. FILE_SUPERSEDE deletes an existing file
1279                  * (requiring delete access) then recreates it.
1280                  */
1281                 case FILE_SUPERSEDE:
1282                         /* If file exists replace/overwrite. If file doesn't
1283                          * exist create. */
1284                         flags2 |= (O_CREAT | O_TRUNC);
1285                         break;
1286
1287                 case FILE_OVERWRITE_IF:
1288                         /* If file exists replace/overwrite. If file doesn't
1289                          * exist create. */
1290                         flags2 |= (O_CREAT | O_TRUNC);
1291                         break;
1292
1293                 case FILE_OPEN:
1294                         /* If file exists open. If file doesn't exist error. */
1295                         if (!file_existed) {
1296                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1297                                          "requested for file %s and file "
1298                                          "doesn't exist.\n", fname ));
1299                                 errno = ENOENT;
1300                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1301                         }
1302                         break;
1303
1304                 case FILE_OVERWRITE:
1305                         /* If file exists overwrite. If file doesn't exist
1306                          * error. */
1307                         if (!file_existed) {
1308                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1309                                          "requested for file %s and file "
1310                                          "doesn't exist.\n", fname ));
1311                                 errno = ENOENT;
1312                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1313                         }
1314                         flags2 |= O_TRUNC;
1315                         break;
1316
1317                 case FILE_CREATE:
1318                         /* If file exists error. If file doesn't exist
1319                          * create. */
1320                         if (file_existed) {
1321                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1322                                          "requested for file %s and file "
1323                                          "already exists.\n", fname ));
1324                                 if (S_ISDIR(psbuf->st_mode)) {
1325                                         errno = EISDIR;
1326                                 } else {
1327                                         errno = EEXIST;
1328                                 }
1329                                 return map_nt_error_from_unix(errno);
1330                         }
1331                         flags2 |= (O_CREAT|O_EXCL);
1332                         break;
1333
1334                 case FILE_OPEN_IF:
1335                         /* If file exists open. If file doesn't exist
1336                          * create. */
1337                         flags2 |= O_CREAT;
1338                         break;
1339
1340                 default:
1341                         return NT_STATUS_INVALID_PARAMETER;
1342         }
1343
1344         /* We only care about matching attributes on file exists and
1345          * overwrite. */
1346
1347         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1348                              (create_disposition == FILE_OVERWRITE_IF))) {
1349                 if (!open_match_attributes(conn, fname,
1350                                            existing_dos_attributes,
1351                                            new_dos_attributes, psbuf->st_mode,
1352                                            unx_mode, &new_unx_mode)) {
1353                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1354                                  "for file %s (%x %x) (0%o, 0%o)\n",
1355                                  fname, existing_dos_attributes,
1356                                  new_dos_attributes,
1357                                  (unsigned int)psbuf->st_mode,
1358                                  (unsigned int)unx_mode ));
1359                         errno = EACCES;
1360                         return NT_STATUS_ACCESS_DENIED;
1361                 }
1362         }
1363
1364         /* This is a nasty hack - must fix... JRA. */
1365         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1366                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1367         }
1368
1369         /*
1370          * Convert GENERIC bits to specific bits.
1371          */
1372
1373         se_map_generic(&access_mask, &file_generic_mapping);
1374         open_access_mask = access_mask;
1375
1376         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1377                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1378         }
1379
1380         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1381                    "access_mask=0x%x\n", fname, access_mask ));
1382
1383         /*
1384          * Note that we ignore the append flag as append does not
1385          * mean the same thing under DOS and Unix.
1386          */
1387
1388         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1389                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1390                 /* DENY_DOS opens are always underlying read-write on the
1391                    file handle, no matter what the requested access mask
1392                     says. */
1393                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1394                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1395                         flags = O_RDWR;
1396                 } else {
1397                         flags = O_WRONLY;
1398                 }
1399         } else {
1400                 flags = O_RDONLY;
1401         }
1402
1403         /*
1404          * Currently we only look at FILE_WRITE_THROUGH for create options.
1405          */
1406
1407 #if defined(O_SYNC)
1408         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1409                 flags2 |= O_SYNC;
1410         }
1411 #endif /* O_SYNC */
1412
1413         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1414                 flags2 |= O_APPEND;
1415         }
1416
1417         if (!posix_open && !CAN_WRITE(conn)) {
1418                 /*
1419                  * We should really return a permission denied error if either
1420                  * O_CREAT or O_TRUNC are set, but for compatibility with
1421                  * older versions of Samba we just AND them out.
1422                  */
1423                 flags2 &= ~(O_CREAT|O_TRUNC);
1424         }
1425
1426         /*
1427          * Ensure we can't write on a read-only share or file.
1428          */
1429
1430         if (flags != O_RDONLY && file_existed &&
1431             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1432                 DEBUG(5,("open_file_ntcreate: write access requested for "
1433                          "file %s on read only %s\n",
1434                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1435                 errno = EACCES;
1436                 return NT_STATUS_ACCESS_DENIED;
1437         }
1438
1439         status = file_new(req, conn, &fsp);
1440         if(!NT_STATUS_IS_OK(status)) {
1441                 return status;
1442         }
1443
1444         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1445         fsp->share_access = share_access;
1446         fsp->fh->private_options = create_options;
1447         fsp->access_mask = open_access_mask; /* We change this to the
1448                                               * requested access_mask after
1449                                               * the open is done. */
1450         fsp->posix_open = posix_open;
1451
1452         /* Ensure no SAMBA_PRIVATE bits can be set. */
1453         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1454
1455         if (timeval_is_zero(&request_time)) {
1456                 request_time = fsp->open_time;
1457         }
1458
1459         if (file_existed) {
1460                 struct timespec old_write_time = get_mtimespec(psbuf);
1461                 id = vfs_file_id_from_sbuf(conn, psbuf);
1462
1463                 lck = get_share_mode_lock(talloc_tos(), id,
1464                                           conn->connectpath,
1465                                           fname, &old_write_time);
1466
1467                 if (lck == NULL) {
1468                         file_free(req, fsp);
1469                         DEBUG(0, ("Could not get share mode lock\n"));
1470                         return NT_STATUS_SHARING_VIOLATION;
1471                 }
1472
1473                 /* First pass - send break only on batch oplocks. */
1474                 if ((req != NULL)
1475                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1476                                          oplock_request)) {
1477                         schedule_defer_open(lck, request_time, req);
1478                         TALLOC_FREE(lck);
1479                         file_free(req, fsp);
1480                         return NT_STATUS_SHARING_VIOLATION;
1481                 }
1482
1483                 /* Use the client requested access mask here, not the one we
1484                  * open with. */
1485                 status = open_mode_check(conn, fname, lck,
1486                                          access_mask, share_access,
1487                                          create_options, &file_existed);
1488
1489                 if (NT_STATUS_IS_OK(status)) {
1490                         /* We might be going to allow this open. Check oplock
1491                          * status again. */
1492                         /* Second pass - send break for both batch or
1493                          * exclusive oplocks. */
1494                         if ((req != NULL)
1495                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1496                                                   oplock_request)) {
1497                                 schedule_defer_open(lck, request_time, req);
1498                                 TALLOC_FREE(lck);
1499                                 file_free(req, fsp);
1500                                 return NT_STATUS_SHARING_VIOLATION;
1501                         }
1502                 }
1503
1504                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1505                         /* DELETE_PENDING is not deferred for a second */
1506                         TALLOC_FREE(lck);
1507                         file_free(req, fsp);
1508                         return status;
1509                 }
1510
1511                 if (!NT_STATUS_IS_OK(status)) {
1512                         uint32 can_access_mask;
1513                         bool can_access = True;
1514
1515                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1516
1517                         /* Check if this can be done with the deny_dos and fcb
1518                          * calls. */
1519                         if (create_options &
1520                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1521                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1522                                 files_struct *fsp_dup;
1523
1524                                 if (req == NULL) {
1525                                         DEBUG(0, ("DOS open without an SMB "
1526                                                   "request!\n"));
1527                                         TALLOC_FREE(lck);
1528                                         file_free(req, fsp);
1529                                         return NT_STATUS_INTERNAL_ERROR;
1530                                 }
1531
1532                                 /* Use the client requested access mask here,
1533                                  * not the one we open with. */
1534                                 fsp_dup = fcb_or_dos_open(req, conn, fname, id,
1535                                                           req->smbpid,
1536                                                           req->vuid,
1537                                                           access_mask,
1538                                                           share_access,
1539                                                           create_options);
1540
1541                                 if (fsp_dup) {
1542                                         TALLOC_FREE(lck);
1543                                         file_free(req, fsp);
1544                                         if (pinfo) {
1545                                                 *pinfo = FILE_WAS_OPENED;
1546                                         }
1547                                         conn->num_files_open++;
1548                                         *result = fsp_dup;
1549                                         return NT_STATUS_OK;
1550                                 }
1551                         }
1552
1553                         /*
1554                          * This next line is a subtlety we need for
1555                          * MS-Access. If a file open will fail due to share
1556                          * permissions and also for security (access) reasons,
1557                          * we need to return the access failed error, not the
1558                          * share error. We can't open the file due to kernel
1559                          * oplock deadlock (it's possible we failed above on
1560                          * the open_mode_check()) so use a userspace check.
1561                          */
1562
1563                         if (flags & O_RDWR) {
1564                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1565                         } else if (flags & O_WRONLY) {
1566                                 can_access_mask = FILE_WRITE_DATA;
1567                         } else {
1568                                 can_access_mask = FILE_READ_DATA;
1569                         }
1570
1571                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1572                             !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1573                                 can_access = False;
1574                         }
1575
1576                         /*
1577                          * If we're returning a share violation, ensure we
1578                          * cope with the braindead 1 second delay.
1579                          */
1580
1581                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1582                             lp_defer_sharing_violations()) {
1583                                 struct timeval timeout;
1584                                 struct deferred_open_record state;
1585                                 int timeout_usecs;
1586
1587                                 /* this is a hack to speed up torture tests
1588                                    in 'make test' */
1589                                 timeout_usecs = lp_parm_int(SNUM(conn),
1590                                                             "smbd","sharedelay",
1591                                                             SHARING_VIOLATION_USEC_WAIT);
1592
1593                                 /* This is a relative time, added to the absolute
1594                                    request_time value to get the absolute timeout time.
1595                                    Note that if this is the second or greater time we enter
1596                                    this codepath for this particular request mid then
1597                                    request_time is left as the absolute time of the *first*
1598                                    time this request mid was processed. This is what allows
1599                                    the request to eventually time out. */
1600
1601                                 timeout = timeval_set(0, timeout_usecs);
1602
1603                                 /* Nothing actually uses state.delayed_for_oplocks
1604                                    but it's handy to differentiate in debug messages
1605                                    between a 30 second delay due to oplock break, and
1606                                    a 1 second delay for share mode conflicts. */
1607
1608                                 state.delayed_for_oplocks = False;
1609                                 state.id = id;
1610
1611                                 if ((req != NULL)
1612                                     && !request_timed_out(request_time,
1613                                                           timeout)) {
1614                                         defer_open(lck, request_time, timeout,
1615                                                    req, &state);
1616                                 }
1617                         }
1618
1619                         TALLOC_FREE(lck);
1620                         if (can_access) {
1621                                 /*
1622                                  * We have detected a sharing violation here
1623                                  * so return the correct error code
1624                                  */
1625                                 status = NT_STATUS_SHARING_VIOLATION;
1626                         } else {
1627                                 status = NT_STATUS_ACCESS_DENIED;
1628                         }
1629                         file_free(req, fsp);
1630                         return status;
1631                 }
1632
1633                 /*
1634                  * We exit this block with the share entry *locked*.....
1635                  */
1636         }
1637
1638         SMB_ASSERT(!file_existed || (lck != NULL));
1639
1640         /*
1641          * Ensure we pay attention to default ACLs on directories if required.
1642          */
1643
1644         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1645             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1646                 unx_mode = 0777;
1647         }
1648
1649         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1650                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1651                  (unsigned int)flags, (unsigned int)flags2,
1652                  (unsigned int)unx_mode, (unsigned int)access_mask,
1653                  (unsigned int)open_access_mask));
1654
1655         /*
1656          * open_file strips any O_TRUNC flags itself.
1657          */
1658
1659         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1660                              flags|flags2, unx_mode, access_mask,
1661                              open_access_mask);
1662
1663         if (!NT_STATUS_IS_OK(fsp_open)) {
1664                 if (lck != NULL) {
1665                         TALLOC_FREE(lck);
1666                 }
1667                 file_free(req, fsp);
1668                 return fsp_open;
1669         }
1670
1671         if (!file_existed) {
1672                 struct timespec old_write_time = get_mtimespec(psbuf);
1673                 /*
1674                  * Deal with the race condition where two smbd's detect the
1675                  * file doesn't exist and do the create at the same time. One
1676                  * of them will win and set a share mode, the other (ie. this
1677                  * one) should check if the requested share mode for this
1678                  * create is allowed.
1679                  */
1680
1681                 /*
1682                  * Now the file exists and fsp is successfully opened,
1683                  * fsp->dev and fsp->inode are valid and should replace the
1684                  * dev=0,inode=0 from a non existent file. Spotted by
1685                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1686                  */
1687
1688                 id = fsp->file_id;
1689
1690                 lck = get_share_mode_lock(talloc_tos(), id,
1691                                           conn->connectpath,
1692                                           fname, &old_write_time);
1693
1694                 if (lck == NULL) {
1695                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1696                                   "mode lock for %s\n", fname));
1697                         fd_close(fsp);
1698                         file_free(req, fsp);
1699                         return NT_STATUS_SHARING_VIOLATION;
1700                 }
1701
1702                 /* First pass - send break only on batch oplocks. */
1703                 if ((req != NULL)
1704                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1705                                          oplock_request)) {
1706                         schedule_defer_open(lck, request_time, req);
1707                         TALLOC_FREE(lck);
1708                         fd_close(fsp);
1709                         file_free(req, fsp);
1710                         return NT_STATUS_SHARING_VIOLATION;
1711                 }
1712
1713                 status = open_mode_check(conn, fname, lck,
1714                                          access_mask, share_access,
1715                                          create_options, &file_existed);
1716
1717                 if (NT_STATUS_IS_OK(status)) {
1718                         /* We might be going to allow this open. Check oplock
1719                          * status again. */
1720                         /* Second pass - send break for both batch or
1721                          * exclusive oplocks. */
1722                         if ((req != NULL)
1723                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1724                                                  oplock_request)) {
1725                                 schedule_defer_open(lck, request_time, req);
1726                                 TALLOC_FREE(lck);
1727                                 fd_close(fsp);
1728                                 file_free(req, fsp);
1729                                 return NT_STATUS_SHARING_VIOLATION;
1730                         }
1731                 }
1732
1733                 if (!NT_STATUS_IS_OK(status)) {
1734                         struct deferred_open_record state;
1735
1736                         fd_close(fsp);
1737                         file_free(req, fsp);
1738
1739                         state.delayed_for_oplocks = False;
1740                         state.id = id;
1741
1742                         /* Do it all over again immediately. In the second
1743                          * round we will find that the file existed and handle
1744                          * the DELETE_PENDING and FCB cases correctly. No need
1745                          * to duplicate the code here. Essentially this is a
1746                          * "goto top of this function", but don't tell
1747                          * anybody... */
1748
1749                         if (req != NULL) {
1750                                 defer_open(lck, request_time, timeval_zero(),
1751                                            req, &state);
1752                         }
1753                         TALLOC_FREE(lck);
1754                         return status;
1755                 }
1756
1757                 /*
1758                  * We exit this block with the share entry *locked*.....
1759                  */
1760
1761         }
1762
1763         SMB_ASSERT(lck != NULL);
1764
1765         /* note that we ignore failure for the following. It is
1766            basically a hack for NFS, and NFS will never set one of
1767            these only read them. Nobody but Samba can ever set a deny
1768            mode and we have already checked our more authoritative
1769            locking database for permission to set this deny mode. If
1770            the kernel refuses the operations then the kernel is wrong.
1771            note that GPFS supports it as well - jmcd */
1772
1773         if (fsp->fh->fd != -1) {
1774                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1775                 if(ret_flock == -1 ){
1776
1777                         TALLOC_FREE(lck);
1778                         fd_close(fsp);
1779                         file_free(req, fsp);
1780
1781                         return NT_STATUS_SHARING_VIOLATION;
1782                 }
1783         }
1784
1785         /*
1786          * At this point onwards, we can guarentee that the share entry
1787          * is locked, whether we created the file or not, and that the
1788          * deny mode is compatible with all current opens.
1789          */
1790
1791         /*
1792          * If requested, truncate the file.
1793          */
1794
1795         if (flags2&O_TRUNC) {
1796                 /*
1797                  * We are modifing the file after open - update the stat
1798                  * struct..
1799                  */
1800                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1801                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1802                         status = map_nt_error_from_unix(errno);
1803                         TALLOC_FREE(lck);
1804                         fd_close(fsp);
1805                         file_free(req, fsp);
1806                         return status;
1807                 }
1808         }
1809
1810         /* Record the options we were opened with. */
1811         fsp->share_access = share_access;
1812         fsp->fh->private_options = create_options;
1813         fsp->access_mask = access_mask;
1814
1815         if (file_existed) {
1816                 /* stat opens on existing files don't get oplocks. */
1817                 if (is_stat_open(open_access_mask)) {
1818                         fsp->oplock_type = NO_OPLOCK;
1819                 }
1820
1821                 if (!(flags2 & O_TRUNC)) {
1822                         info = FILE_WAS_OPENED;
1823                 } else {
1824                         info = FILE_WAS_OVERWRITTEN;
1825                 }
1826         } else {
1827                 info = FILE_WAS_CREATED;
1828         }
1829
1830         if (pinfo) {
1831                 *pinfo = info;
1832         }
1833
1834         /*
1835          * Setup the oplock info in both the shared memory and
1836          * file structs.
1837          */
1838
1839         if ((fsp->oplock_type != NO_OPLOCK) &&
1840             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1841                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1842                         /* Could not get the kernel oplock */
1843                         fsp->oplock_type = NO_OPLOCK;
1844                 }
1845         }
1846
1847         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1848                 new_file_created = True;
1849         }
1850
1851         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1852                        fsp->oplock_type, new_file_created);
1853
1854         /* Handle strange delete on close create semantics. */
1855         if ((create_options & FILE_DELETE_ON_CLOSE)
1856             && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1857                         && is_ntfs_stream_name(fname))
1858                 || can_set_initial_delete_on_close(lck))) {
1859                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1860
1861                 if (!NT_STATUS_IS_OK(status)) {
1862                         /* Remember to delete the mode we just added. */
1863                         del_share_mode(lck, fsp);
1864                         TALLOC_FREE(lck);
1865                         fd_close(fsp);
1866                         file_free(req, fsp);
1867                         return status;
1868                 }
1869                 /* Note that here we set the *inital* delete on close flag,
1870                    not the regular one. The magic gets handled in close. */
1871                 fsp->initial_delete_on_close = True;
1872         }
1873
1874         if (new_file_created) {
1875                 /* Files should be initially set as archive */
1876                 if (lp_map_archive(SNUM(conn)) ||
1877                     lp_store_dos_attributes(SNUM(conn))) {
1878                         if (!posix_open) {
1879                                 SMB_STRUCT_STAT tmp_sbuf;
1880                                 SET_STAT_INVALID(tmp_sbuf);
1881                                 if (file_set_dosmode(
1882                                             conn, fname,
1883                                             new_dos_attributes | aARCH,
1884                                             &tmp_sbuf, parent_dir,
1885                                             true) == 0) {
1886                                         unx_mode = tmp_sbuf.st_mode;
1887                                 }
1888                         }
1889                 }
1890         }
1891
1892         /*
1893          * Take care of inherited ACLs on created files - if default ACL not
1894          * selected.
1895          */
1896
1897         if (!posix_open && !file_existed && !def_acl) {
1898
1899                 int saved_errno = errno; /* We might get ENOSYS in the next
1900                                           * call.. */
1901
1902                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1903                     errno == ENOSYS) {
1904                         errno = saved_errno; /* Ignore ENOSYS */
1905                 }
1906
1907         } else if (new_unx_mode) {
1908
1909                 int ret = -1;
1910
1911                 /* Attributes need changing. File already existed. */
1912
1913                 {
1914                         int saved_errno = errno; /* We might get ENOSYS in the
1915                                                   * next call.. */
1916                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1917
1918                         if (ret == -1 && errno == ENOSYS) {
1919                                 errno = saved_errno; /* Ignore ENOSYS */
1920                         } else {
1921                                 DEBUG(5, ("open_file_ntcreate: reset "
1922                                           "attributes of file %s to 0%o\n",
1923                                           fname, (unsigned int)new_unx_mode));
1924                                 ret = 0; /* Don't do the fchmod below. */
1925                         }
1926                 }
1927
1928                 if ((ret == -1) &&
1929                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1930                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1931                                   "attributes of file %s to 0%o\n",
1932                                   fname, (unsigned int)new_unx_mode));
1933         }
1934
1935         /* If this is a successful open, we must remove any deferred open
1936          * records. */
1937         if (req != NULL) {
1938                 del_deferred_open_entry(lck, req->mid);
1939         }
1940         TALLOC_FREE(lck);
1941
1942         conn->num_files_open++;
1943
1944         *result = fsp;
1945         return NT_STATUS_OK;
1946 }
1947
1948 /****************************************************************************
1949  Open a file for for write to ensure that we can fchmod it.
1950 ****************************************************************************/
1951
1952 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
1953                           const char *fname,
1954                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1955 {
1956         files_struct *fsp = NULL;
1957         NTSTATUS status;
1958
1959         if (!VALID_STAT(*psbuf)) {
1960                 return NT_STATUS_INVALID_PARAMETER;
1961         }
1962
1963         status = file_new(req, conn, &fsp);
1964         if(!NT_STATUS_IS_OK(status)) {
1965                 return status;
1966         }
1967
1968         /* note! we must use a non-zero desired access or we don't get
1969            a real file descriptor. Oh what a twisted web we weave. */
1970         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1971                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1972
1973         /*
1974          * This is not a user visible file open.
1975          * Don't set a share mode and don't increment
1976          * the conn->num_files_open.
1977          */
1978
1979         if (!NT_STATUS_IS_OK(status)) {
1980                 file_free(req, fsp);
1981                 return status;
1982         }
1983
1984         *result = fsp;
1985         return NT_STATUS_OK;
1986 }
1987
1988 /****************************************************************************
1989  Close the fchmod file fd - ensure no locks are lost.
1990 ****************************************************************************/
1991
1992 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
1993 {
1994         NTSTATUS status = fd_close(fsp);
1995         file_free(req, fsp);
1996         return status;
1997 }
1998
1999 static NTSTATUS mkdir_internal(connection_struct *conn,
2000                                 const char *name,
2001                                 uint32 file_attributes,
2002                                 SMB_STRUCT_STAT *psbuf)
2003 {
2004         mode_t mode;
2005         char *parent_dir;
2006         const char *dirname;
2007         NTSTATUS status;
2008         bool posix_open = false;
2009
2010         if(!CAN_WRITE(conn)) {
2011                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2012                          "%s\n", lp_servicename(SNUM(conn))));
2013                 return NT_STATUS_ACCESS_DENIED;
2014         }
2015
2016         status = check_name(conn, name);
2017         if (!NT_STATUS_IS_OK(status)) {
2018                 return status;
2019         }
2020
2021         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2022                                    &dirname)) {
2023                 return NT_STATUS_NO_MEMORY;
2024         }
2025
2026         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2027                 posix_open = true;
2028                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2029         } else {
2030                 mode = unix_mode(conn, aDIR, name, parent_dir);
2031         }
2032
2033         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2034                 return map_nt_error_from_unix(errno);
2035         }
2036
2037         /* Ensure we're checking for a symlink here.... */
2038         /* We don't want to get caught by a symlink racer. */
2039
2040         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2041                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2042                           name, strerror(errno)));
2043                 return map_nt_error_from_unix(errno);
2044         }
2045
2046         if (!S_ISDIR(psbuf->st_mode)) {
2047                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2048                           name));
2049                 return NT_STATUS_ACCESS_DENIED;
2050         }
2051
2052         if (lp_store_dos_attributes(SNUM(conn))) {
2053                 if (!posix_open) {
2054                         file_set_dosmode(conn, name,
2055                                  file_attributes | aDIR, NULL,
2056                                  parent_dir,
2057                                  true);
2058                 }
2059         }
2060
2061         if (lp_inherit_perms(SNUM(conn))) {
2062                 inherit_access_posix_acl(conn, parent_dir, name, mode);
2063         }
2064
2065         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2066                 /*
2067                  * Check if high bits should have been set,
2068                  * then (if bits are missing): add them.
2069                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2070                  * dir.
2071                  */
2072                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2073                         SMB_VFS_CHMOD(conn, name,
2074                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2075                 }
2076         }
2077
2078         /* Change the owner if required. */
2079         if (lp_inherit_owner(SNUM(conn))) {
2080                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2081         }
2082
2083         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2084                      name);
2085
2086         return NT_STATUS_OK;
2087 }
2088
2089 /****************************************************************************
2090  Open a directory from an NT SMB call.
2091 ****************************************************************************/
2092
2093 NTSTATUS open_directory(connection_struct *conn,
2094                         struct smb_request *req,
2095                         const char *fname,
2096                         SMB_STRUCT_STAT *psbuf,
2097                         uint32 access_mask,
2098                         uint32 share_access,
2099                         uint32 create_disposition,
2100                         uint32 create_options,
2101                         uint32 file_attributes,
2102                         int *pinfo,
2103                         files_struct **result)
2104 {
2105         files_struct *fsp = NULL;
2106         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2107         struct share_mode_lock *lck = NULL;
2108         NTSTATUS status;
2109         struct timespec mtimespec;
2110         int info = 0;
2111
2112         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2113                  "share_access = 0x%x create_options = 0x%x, "
2114                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2115                  fname,
2116                  (unsigned int)access_mask,
2117                  (unsigned int)share_access,
2118                  (unsigned int)create_options,
2119                  (unsigned int)create_disposition,
2120                  (unsigned int)file_attributes));
2121
2122         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2123                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2124                         is_ntfs_stream_name(fname)) {
2125                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2126                 return NT_STATUS_NOT_A_DIRECTORY;
2127         }
2128
2129         switch( create_disposition ) {
2130                 case FILE_OPEN:
2131
2132                         info = FILE_WAS_OPENED;
2133
2134                         /*
2135                          * We want to follow symlinks here.
2136                          */
2137
2138                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2139                                 return map_nt_error_from_unix(errno);
2140                         }
2141
2142                         break;
2143
2144                 case FILE_CREATE:
2145
2146                         /* If directory exists error. If directory doesn't
2147                          * exist create. */
2148
2149                         status = mkdir_internal(conn,
2150                                                 fname,
2151                                                 file_attributes,
2152                                                 psbuf);
2153
2154                         if (!NT_STATUS_IS_OK(status)) {
2155                                 DEBUG(2, ("open_directory: unable to create "
2156                                           "%s. Error was %s\n", fname,
2157                                           nt_errstr(status)));
2158                                 return status;
2159                         }
2160
2161                         info = FILE_WAS_CREATED;
2162                         break;
2163
2164                 case FILE_OPEN_IF:
2165                         /*
2166                          * If directory exists open. If directory doesn't
2167                          * exist create.
2168                          */
2169
2170                         status = mkdir_internal(conn,
2171                                                 fname,
2172                                                 file_attributes,
2173                                                 psbuf);
2174
2175                         if (NT_STATUS_IS_OK(status)) {
2176                                 info = FILE_WAS_CREATED;
2177                         }
2178
2179                         if (NT_STATUS_EQUAL(status,
2180                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2181                                 info = FILE_WAS_OPENED;
2182                                 status = NT_STATUS_OK;
2183                         }
2184
2185                         break;
2186
2187                 case FILE_SUPERSEDE:
2188                 case FILE_OVERWRITE:
2189                 case FILE_OVERWRITE_IF:
2190                 default:
2191                         DEBUG(5,("open_directory: invalid create_disposition "
2192                                  "0x%x for directory %s\n",
2193                                  (unsigned int)create_disposition, fname));
2194                         return NT_STATUS_INVALID_PARAMETER;
2195         }
2196
2197         if(!S_ISDIR(psbuf->st_mode)) {
2198                 DEBUG(5,("open_directory: %s is not a directory !\n",
2199                          fname ));
2200                 return NT_STATUS_NOT_A_DIRECTORY;
2201         }
2202
2203         status = file_new(req, conn, &fsp);
2204         if(!NT_STATUS_IS_OK(status)) {
2205                 return status;
2206         }
2207
2208         /*
2209          * Setup the files_struct for it.
2210          */
2211
2212         fsp->mode = psbuf->st_mode;
2213         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2214         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2215         fsp->file_pid = req ? req->smbpid : 0;
2216         fsp->can_lock = False;
2217         fsp->can_read = False;
2218         fsp->can_write = False;
2219
2220         fsp->share_access = share_access;
2221         fsp->fh->private_options = create_options;
2222         fsp->access_mask = access_mask;
2223
2224         fsp->print_file = False;
2225         fsp->modified = False;
2226         fsp->oplock_type = NO_OPLOCK;
2227         fsp->sent_oplock_break = NO_BREAK_SENT;
2228         fsp->is_directory = True;
2229         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2230
2231         string_set(&fsp->fsp_name,fname);
2232
2233         mtimespec = get_mtimespec(psbuf);
2234
2235         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2236                                   conn->connectpath,
2237                                   fname, &mtimespec);
2238
2239         if (lck == NULL) {
2240                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2241                 file_free(req, fsp);
2242                 return NT_STATUS_SHARING_VIOLATION;
2243         }
2244
2245         status = open_mode_check(conn, fname, lck,
2246                                 access_mask, share_access,
2247                                 create_options, &dir_existed);
2248
2249         if (!NT_STATUS_IS_OK(status)) {
2250                 TALLOC_FREE(lck);
2251                 file_free(req, fsp);
2252                 return status;
2253         }
2254
2255         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2256                        True);
2257
2258         /* For directories the delete on close bit at open time seems
2259            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2260         if (create_options & FILE_DELETE_ON_CLOSE) {
2261                 status = can_set_delete_on_close(fsp, True, 0);
2262                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2263                         TALLOC_FREE(lck);
2264                         file_free(req, fsp);
2265                         return status;
2266                 }
2267
2268                 if (NT_STATUS_IS_OK(status)) {
2269                         /* Note that here we set the *inital* delete on close flag,
2270                            not the regular one. The magic gets handled in close. */
2271                         fsp->initial_delete_on_close = True;
2272                 }
2273         }
2274
2275         TALLOC_FREE(lck);
2276
2277         if (pinfo) {
2278                 *pinfo = info;
2279         }
2280
2281         conn->num_files_open++;
2282
2283         *result = fsp;
2284         return NT_STATUS_OK;
2285 }
2286
2287 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2288 {
2289         NTSTATUS status;
2290         SMB_STRUCT_STAT sbuf;
2291         files_struct *fsp;
2292
2293         SET_STAT_INVALID(sbuf);
2294
2295         status = open_directory(conn, req, directory, &sbuf,
2296                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2297                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2298                                 FILE_CREATE,
2299                                 0,
2300                                 FILE_ATTRIBUTE_DIRECTORY,
2301                                 NULL,
2302                                 &fsp);
2303
2304         if (NT_STATUS_IS_OK(status)) {
2305                 close_file(req, fsp, NORMAL_CLOSE);
2306         }
2307
2308         return status;
2309 }
2310
2311 /****************************************************************************
2312  Receive notification that one of our open files has been renamed by another
2313  smbd process.
2314 ****************************************************************************/
2315
2316 void msg_file_was_renamed(struct messaging_context *msg,
2317                           void *private_data,
2318                           uint32_t msg_type,
2319                           struct server_id server_id,
2320                           DATA_BLOB *data)
2321 {
2322         files_struct *fsp;
2323         char *frm = (char *)data->data;
2324         struct file_id id;
2325         const char *sharepath;
2326         const char *newname;
2327         size_t sp_len;
2328
2329         if (data->data == NULL
2330             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2331                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2332                           (int)data->length));
2333                 return;
2334         }
2335
2336         /* Unpack the message. */
2337         pull_file_id_16(frm, &id);
2338         sharepath = &frm[16];
2339         newname = sharepath + strlen(sharepath) + 1;
2340         sp_len = strlen(sharepath);
2341
2342         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2343                 "file_id %s\n",
2344                   sharepath, newname, file_id_string_tos(&id)));
2345
2346         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2347                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2348                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2349                                 fsp->fnum, fsp->fsp_name, newname ));
2350                         string_set(&fsp->fsp_name, newname);
2351                 } else {
2352                         /* TODO. JRA. */
2353                         /* Now we have the complete path we can work out if this is
2354                            actually within this share and adjust newname accordingly. */
2355                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2356                                 "not sharepath %s) "
2357                                 "fnum %d from %s -> %s\n",
2358                                 fsp->conn->connectpath,
2359                                 sharepath,
2360                                 fsp->fnum,
2361                                 fsp->fsp_name,
2362                                 newname ));
2363                 }
2364         }
2365 }
2366
2367 struct case_semantics_state {
2368         connection_struct *conn;
2369         bool case_sensitive;
2370         bool case_preserve;
2371         bool short_case_preserve;
2372 };
2373
2374 /****************************************************************************
2375  Restore case semantics.
2376 ****************************************************************************/
2377 static int restore_case_semantics(struct case_semantics_state *state)
2378 {
2379         state->conn->case_sensitive = state->case_sensitive;
2380         state->conn->case_preserve = state->case_preserve;
2381         state->conn->short_case_preserve = state->short_case_preserve;
2382         return 0;
2383 }
2384
2385 /****************************************************************************
2386  Save case semantics.
2387 ****************************************************************************/
2388 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2389                                                              connection_struct *conn)
2390 {
2391         struct case_semantics_state *result;
2392
2393         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2394                 DEBUG(0, ("talloc failed\n"));
2395                 return NULL;
2396         }
2397
2398         result->conn = conn;
2399         result->case_sensitive = conn->case_sensitive;
2400         result->case_preserve = conn->case_preserve;
2401         result->short_case_preserve = conn->short_case_preserve;
2402
2403         /* Set to POSIX. */
2404         conn->case_sensitive = True;
2405         conn->case_preserve = True;
2406         conn->short_case_preserve = True;
2407
2408         talloc_set_destructor(result, restore_case_semantics);
2409
2410         return result;
2411 }
2412
2413 /*
2414  * If a main file is opened for delete, all streams need to be checked for
2415  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2416  * If that works, delete them all by setting the delete on close and close.
2417  */
2418
2419 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2420                                         const char *fname)
2421 {
2422         struct stream_struct *stream_info;
2423         files_struct **streams;
2424         int i;
2425         unsigned int num_streams;
2426         TALLOC_CTX *frame = talloc_stackframe();
2427         NTSTATUS status;
2428
2429         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2430                                     &num_streams, &stream_info);
2431
2432         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2433             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2434                 DEBUG(10, ("no streams around\n"));
2435                 TALLOC_FREE(frame);
2436                 return NT_STATUS_OK;
2437         }
2438
2439         if (!NT_STATUS_IS_OK(status)) {
2440                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2441                            nt_errstr(status)));
2442                 goto fail;
2443         }
2444
2445         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2446                    num_streams));
2447
2448         if (num_streams == 0) {
2449                 TALLOC_FREE(frame);
2450                 return NT_STATUS_OK;
2451         }
2452
2453         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2454         if (streams == NULL) {
2455                 DEBUG(0, ("talloc failed\n"));
2456                 status = NT_STATUS_NO_MEMORY;
2457                 goto fail;
2458         }
2459
2460         for (i=0; i<num_streams; i++) {
2461                 char *streamname;
2462
2463                 if (strequal(stream_info[i].name, "::$DATA")) {
2464                         streams[i] = NULL;
2465                         continue;
2466                 }
2467
2468                 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2469                                              stream_info[i].name);
2470
2471                 if (streamname == NULL) {
2472                         DEBUG(0, ("talloc_aprintf failed\n"));
2473                         status = NT_STATUS_NO_MEMORY;
2474                         goto fail;
2475                 }
2476
2477                 status = create_file_unixpath
2478                         (conn,                  /* conn */
2479                          NULL,                  /* req */
2480                          streamname,            /* fname */
2481                          DELETE_ACCESS,         /* access_mask */
2482                          FILE_SHARE_READ | FILE_SHARE_WRITE
2483                          | FILE_SHARE_DELETE,   /* share_access */
2484                          FILE_OPEN,             /* create_disposition*/
2485                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2486                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2487                          0,                     /* oplock_request */
2488                          0,                     /* allocation_size */
2489                          NULL,                  /* sd */
2490                          NULL,                  /* ea_list */
2491                          &streams[i],           /* result */
2492                          NULL,                  /* pinfo */
2493                          NULL);                 /* psbuf */
2494
2495                 TALLOC_FREE(streamname);
2496
2497                 if (!NT_STATUS_IS_OK(status)) {
2498                         DEBUG(10, ("Could not open stream %s: %s\n",
2499                                    streamname, nt_errstr(status)));
2500                         break;
2501                 }
2502         }
2503
2504         /*
2505          * don't touch the variable "status" beyond this point :-)
2506          */
2507
2508         for (i -= 1 ; i >= 0; i--) {
2509                 if (streams[i] == NULL) {
2510                         continue;
2511                 }
2512
2513                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2514                            streams[i]->fsp_name));
2515                 close_file(NULL, streams[i], NORMAL_CLOSE);
2516         }
2517
2518  fail:
2519         TALLOC_FREE(frame);
2520         return status;
2521 }
2522
2523 /*
2524  * Wrapper around open_file_ntcreate and open_directory
2525  */
2526
2527 NTSTATUS create_file_unixpath(connection_struct *conn,
2528                               struct smb_request *req,
2529                               const char *fname,
2530                               uint32_t access_mask,
2531                               uint32_t share_access,
2532                               uint32_t create_disposition,
2533                               uint32_t create_options,
2534                               uint32_t file_attributes,
2535                               uint32_t oplock_request,
2536                               uint64_t allocation_size,
2537                               struct security_descriptor *sd,
2538                               struct ea_list *ea_list,
2539
2540                               files_struct **result,
2541                               int *pinfo,
2542                               SMB_STRUCT_STAT *psbuf)
2543 {
2544         SMB_STRUCT_STAT sbuf;
2545         int info = FILE_WAS_OPENED;
2546         files_struct *base_fsp = NULL;
2547         files_struct *fsp = NULL;
2548         NTSTATUS status;
2549
2550         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2551                   "file_attributes = 0x%x, share_access = 0x%x, "
2552                   "create_disposition = 0x%x create_options = 0x%x "
2553                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2554                   "fname = %s\n",
2555                   (unsigned int)access_mask,
2556                   (unsigned int)file_attributes,
2557                   (unsigned int)share_access,
2558                   (unsigned int)create_disposition,
2559                   (unsigned int)create_options,
2560                   (unsigned int)oplock_request,
2561                   ea_list, sd, fname));
2562
2563         if (create_options & FILE_OPEN_BY_FILE_ID) {
2564                 status = NT_STATUS_NOT_SUPPORTED;
2565                 goto fail;
2566         }
2567
2568         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2569                 status = NT_STATUS_INVALID_PARAMETER;
2570                 goto fail;
2571         }
2572
2573         if (req == NULL) {
2574                 oplock_request |= INTERNAL_OPEN_ONLY;
2575         }
2576
2577         if (psbuf != NULL) {
2578                 sbuf = *psbuf;
2579         }
2580         else {
2581                 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2582                         SET_STAT_INVALID(sbuf);
2583                 }
2584         }
2585
2586         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2587             && (access_mask & DELETE_ACCESS)
2588             && !is_ntfs_stream_name(fname)) {
2589                 /*
2590                  * We can't open a file with DELETE access if any of the
2591                  * streams is open without FILE_SHARE_DELETE
2592                  */
2593                 status = open_streams_for_delete(conn, fname);
2594
2595                 if (!NT_STATUS_IS_OK(status)) {
2596                         goto fail;
2597                 }
2598         }
2599
2600         /* This is the correct thing to do (check every time) but can_delete
2601          * is expensive (it may have to read the parent directory
2602          * permissions). So for now we're not doing it unless we have a strong
2603          * hint the client is really going to delete this file. If the client
2604          * is forcing FILE_CREATE let the filesystem take care of the
2605          * permissions. */
2606
2607         /* Setting FILE_SHARE_DELETE is the hint. */
2608
2609         if (lp_acl_check_permissions(SNUM(conn))
2610             && (create_disposition != FILE_CREATE)
2611             && (share_access & FILE_SHARE_DELETE)
2612             && (access_mask & DELETE_ACCESS)
2613             && (!can_delete_file_in_directory(conn, fname))) {
2614                 status = NT_STATUS_ACCESS_DENIED;
2615                 goto fail;
2616         }
2617
2618 #if 0
2619         /* We need to support SeSecurityPrivilege for this. */
2620         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2621             !user_has_privileges(current_user.nt_user_token,
2622                                  &se_security)) {
2623                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2624                 goto fail;
2625         }
2626 #endif
2627
2628         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2629             && is_ntfs_stream_name(fname)
2630             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2631                 char *base;
2632                 uint32 base_create_disposition;
2633
2634                 if (create_options & FILE_DIRECTORY_FILE) {
2635                         status = NT_STATUS_NOT_A_DIRECTORY;
2636                         goto fail;
2637                 }
2638
2639                 status = split_ntfs_stream_name(talloc_tos(), fname,
2640                                                 &base, NULL);
2641                 if (!NT_STATUS_IS_OK(status)) {
2642                         DEBUG(10, ("create_file_unixpath: "
2643                                 "split_ntfs_stream_name failed: %s\n",
2644                                 nt_errstr(status)));
2645                         goto fail;
2646                 }
2647
2648                 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2649
2650                 switch (create_disposition) {
2651                 case FILE_OPEN:
2652                         base_create_disposition = FILE_OPEN;
2653                         break;
2654                 default:
2655                         base_create_disposition = FILE_OPEN_IF;
2656                         break;
2657                 }
2658
2659                 status = create_file_unixpath(conn, NULL, base, 0,
2660                                               FILE_SHARE_READ
2661                                               | FILE_SHARE_WRITE
2662                                               | FILE_SHARE_DELETE,
2663                                               base_create_disposition,
2664                                               0, 0, 0, 0, NULL, NULL,
2665                                               &base_fsp, NULL, NULL);
2666                 if (!NT_STATUS_IS_OK(status)) {
2667                         DEBUG(10, ("create_file_unixpath for base %s failed: "
2668                                    "%s\n", base, nt_errstr(status)));
2669                         goto fail;
2670                 }
2671         }
2672
2673         /*
2674          * If it's a request for a directory open, deal with it separately.
2675          */
2676
2677         if (create_options & FILE_DIRECTORY_FILE) {
2678
2679                 if (create_options & FILE_NON_DIRECTORY_FILE) {
2680                         status = NT_STATUS_INVALID_PARAMETER;
2681                         goto fail;
2682                 }
2683
2684                 /* Can't open a temp directory. IFS kit test. */
2685                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2686                         status = NT_STATUS_INVALID_PARAMETER;
2687                         goto fail;
2688                 }
2689
2690                 /*
2691                  * We will get a create directory here if the Win32
2692                  * app specified a security descriptor in the
2693                  * CreateDirectory() call.
2694                  */
2695
2696                 oplock_request = 0;
2697                 status = open_directory(
2698                         conn, req, fname, &sbuf, access_mask, share_access,
2699                         create_disposition, create_options, file_attributes,
2700                         &info, &fsp);
2701         } else {
2702
2703                 /*
2704                  * Ordinary file case.
2705                  */
2706
2707                 status = open_file_ntcreate(
2708                         conn, req, fname, &sbuf, access_mask, share_access,
2709                         create_disposition, create_options, file_attributes,
2710                         oplock_request, &info, &fsp);
2711
2712                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2713
2714                         /*
2715                          * Fail the open if it was explicitly a non-directory
2716                          * file.
2717                          */
2718
2719                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2720                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2721                                 goto fail;
2722                         }
2723
2724                         oplock_request = 0;
2725                         status = open_directory(
2726                                 conn, req, fname, &sbuf, access_mask,
2727                                 share_access, create_disposition,
2728                                 create_options, file_attributes,
2729                                 &info, &fsp);
2730                 }
2731         }
2732
2733         if (!NT_STATUS_IS_OK(status)) {
2734                 goto fail;
2735         }
2736
2737         /*
2738          * According to the MS documentation, the only time the security
2739          * descriptor is applied to the opened file is iff we *created* the
2740          * file; an existing file stays the same.
2741          *
2742          * Also, it seems (from observation) that you can open the file with
2743          * any access mask but you can still write the sd. We need to override
2744          * the granted access before we call set_sd
2745          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2746          */
2747
2748         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2749             && lp_nt_acl_support(SNUM(conn))) {
2750
2751                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2752                 uint32_t saved_access_mask = fsp->access_mask;
2753
2754                 if (sd->owner_sid == NULL) {
2755                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2756                 }
2757                 if (sd->group_sid == NULL) {
2758                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2759                 }
2760                 if (sd->sacl == NULL) {
2761                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2762                 }
2763                 if (sd->dacl == NULL) {
2764                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2765                 }
2766
2767                 fsp->access_mask = FILE_GENERIC_ALL;
2768
2769                 /* Convert all the generic bits. */
2770                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2771                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2772
2773                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2774
2775                 fsp->access_mask = saved_access_mask;
2776
2777                 if (!NT_STATUS_IS_OK(status)) {
2778                         goto fail;
2779                 }
2780         }
2781
2782         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2783                 status = set_ea(conn, fsp, fname, ea_list);
2784                 if (!NT_STATUS_IS_OK(status)) {
2785                         goto fail;
2786                 }
2787         }
2788
2789         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2790                 status = NT_STATUS_ACCESS_DENIED;
2791                 goto fail;
2792         }
2793
2794         /* Save the requested allocation size. */
2795         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2796                 if (allocation_size
2797                     && (allocation_size > sbuf.st_size)) {
2798                         fsp->initial_allocation_size = smb_roundup(
2799                                 fsp->conn, allocation_size);
2800                         if (fsp->is_directory) {
2801                                 /* Can't set allocation size on a directory. */
2802                                 status = NT_STATUS_ACCESS_DENIED;
2803                                 goto fail;
2804                         }
2805                         if (vfs_allocate_file_space(
2806                                     fsp, fsp->initial_allocation_size) == -1) {
2807                                 status = NT_STATUS_DISK_FULL;
2808                                 goto fail;
2809                         }
2810                 } else {
2811                         fsp->initial_allocation_size = smb_roundup(
2812                                 fsp->conn, (uint64_t)sbuf.st_size);
2813                 }
2814         }
2815
2816         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2817
2818         /*
2819          * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2820          * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2821          * also close fsp->base_fsp which we have to also do explicitly in
2822          * this routine here, as not in all "goto fail:" we have the fsp set
2823          * up already to be initialized with the base_fsp.
2824          */
2825
2826         fsp->base_fsp = base_fsp;
2827
2828         *result = fsp;
2829         if (pinfo != NULL) {
2830                 *pinfo = info;
2831         }
2832         if (psbuf != NULL) {
2833                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2834                         *psbuf = sbuf;
2835                 }
2836                 else {
2837                         SMB_VFS_FSTAT(fsp, psbuf);
2838                 }
2839         }
2840         return NT_STATUS_OK;
2841
2842  fail:
2843         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2844
2845         if (fsp != NULL) {
2846                 close_file(req, fsp, ERROR_CLOSE);
2847                 fsp = NULL;
2848         }
2849         if (base_fsp != NULL) {
2850                 close_file(req, base_fsp, ERROR_CLOSE);
2851                 base_fsp = NULL;
2852         }
2853         return status;
2854 }
2855
2856 NTSTATUS create_file(connection_struct *conn,
2857                      struct smb_request *req,
2858                      uint16_t root_dir_fid,
2859                      const char *fname,
2860                      uint32_t access_mask,
2861                      uint32_t share_access,
2862                      uint32_t create_disposition,
2863                      uint32_t create_options,
2864                      uint32_t file_attributes,
2865                      uint32_t oplock_request,
2866                      uint64_t allocation_size,
2867                      struct security_descriptor *sd,
2868                      struct ea_list *ea_list,
2869
2870                      files_struct **result,
2871                      int *pinfo,
2872                      SMB_STRUCT_STAT *psbuf)
2873 {
2874         struct case_semantics_state *case_state = NULL;
2875         SMB_STRUCT_STAT sbuf;
2876         int info = FILE_WAS_OPENED;
2877         files_struct *fsp = NULL;
2878         NTSTATUS status;
2879
2880         DEBUG(10,("create_file: access_mask = 0x%x "
2881                   "file_attributes = 0x%x, share_access = 0x%x, "
2882                   "create_disposition = 0x%x create_options = 0x%x "
2883                   "oplock_request = 0x%x "
2884                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2885                   "fname = %s\n",
2886                   (unsigned int)access_mask,
2887                   (unsigned int)file_attributes,
2888                   (unsigned int)share_access,
2889                   (unsigned int)create_disposition,
2890                   (unsigned int)create_options,
2891                   (unsigned int)oplock_request,
2892                   (unsigned int)root_dir_fid,
2893                   ea_list, sd, fname));
2894
2895         /*
2896          * Get the file name.
2897          */
2898
2899         if (root_dir_fid != 0) {
2900                 /*
2901                  * This filename is relative to a directory fid.
2902                  */
2903                 char *parent_fname = NULL;
2904                 files_struct *dir_fsp = file_fsp(req, root_dir_fid);
2905
2906                 if (dir_fsp == NULL) {
2907                         status = NT_STATUS_INVALID_HANDLE;
2908                         goto fail;
2909                 }
2910
2911                 if (!dir_fsp->is_directory) {
2912
2913                         /*
2914                          * Check to see if this is a mac fork of some kind.
2915                          */
2916
2917                         if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2918                                         is_ntfs_stream_name(fname)) {
2919                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2920                                 goto fail;
2921                         }
2922
2923                         /*
2924                           we need to handle the case when we get a
2925                           relative open relative to a file and the
2926                           pathname is blank - this is a reopen!
2927                           (hint from demyn plantenberg)
2928                         */
2929
2930                         status = NT_STATUS_INVALID_HANDLE;
2931                         goto fail;
2932                 }
2933
2934                 if (ISDOT(dir_fsp->fsp_name)) {
2935                         /*
2936                          * We're at the toplevel dir, the final file name
2937                          * must not contain ./, as this is filtered out
2938                          * normally by srvstr_get_path and unix_convert
2939                          * explicitly rejects paths containing ./.
2940                          */
2941                         parent_fname = talloc_strdup(talloc_tos(), "");
2942                         if (parent_fname == NULL) {
2943                                 status = NT_STATUS_NO_MEMORY;
2944                                 goto fail;
2945                         }
2946                 } else {
2947                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2948
2949                         /*
2950                          * Copy in the base directory name.
2951                          */
2952
2953                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2954                                                     dir_name_len+2);
2955                         if (parent_fname == NULL) {
2956                                 status = NT_STATUS_NO_MEMORY;
2957                                 goto fail;
2958                         }
2959                         memcpy(parent_fname, dir_fsp->fsp_name,
2960                                dir_name_len+1);
2961
2962                         /*
2963                          * Ensure it ends in a '/'.
2964                          * We used TALLOC_SIZE +2 to add space for the '/'.
2965                          */
2966
2967                         if(dir_name_len
2968                            && (parent_fname[dir_name_len-1] != '\\')
2969                            && (parent_fname[dir_name_len-1] != '/')) {
2970                                 parent_fname[dir_name_len] = '/';
2971                                 parent_fname[dir_name_len+1] = '\0';
2972                         }
2973                 }
2974
2975                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2976                                         fname);
2977                 if (fname == NULL) {
2978                         status = NT_STATUS_NO_MEMORY;
2979                         goto fail;
2980                 }
2981         }
2982
2983         /*
2984          * Check to see if this is a mac fork of some kind.
2985          */
2986
2987         if (is_ntfs_stream_name(fname)) {
2988                 enum FAKE_FILE_TYPE fake_file_type;
2989
2990                 fake_file_type = is_fake_file(fname);
2991
2992                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
2993
2994                         /*
2995                          * Here we go! support for changing the disk quotas
2996                          * --metze
2997                          *
2998                          * We need to fake up to open this MAGIC QUOTA file
2999                          * and return a valid FID.
3000                          *
3001                          * w2k close this file directly after openening xp
3002                          * also tries a QUERY_FILE_INFO on the file and then
3003                          * close it
3004                          */
3005                         status = open_fake_file(req, conn, req->vuid,
3006                                                 fake_file_type, fname,
3007                                                 access_mask, &fsp);
3008                         if (!NT_STATUS_IS_OK(status)) {
3009                                 goto fail;
3010                         }
3011
3012                         ZERO_STRUCT(sbuf);
3013                         goto done;
3014                 }
3015
3016                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3017                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3018                         goto fail;
3019                 }
3020         }
3021
3022         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3023                 char *resolved_fname;
3024
3025                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3026                                          &resolved_fname);
3027
3028                 if (!NT_STATUS_IS_OK(status)) {
3029                         /*
3030                          * For PATH_NOT_COVERED we had
3031                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3032                          *                 ERRSRV, ERRbadpath);
3033                          * Need to fix in callers
3034                          */
3035                         goto fail;
3036                 }
3037                 fname = resolved_fname;
3038         }
3039
3040         /*
3041          * Check if POSIX semantics are wanted.
3042          */
3043
3044         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3045                 case_state = set_posix_case_semantics(talloc_tos(), conn);
3046                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3047         }
3048
3049         {
3050                 char *converted_fname;
3051
3052                 SET_STAT_INVALID(sbuf);
3053
3054                 status = unix_convert(talloc_tos(), conn, fname, False,
3055                                       &converted_fname, NULL, &sbuf);
3056                 if (!NT_STATUS_IS_OK(status)) {
3057                         goto fail;
3058                 }
3059                 fname = converted_fname;
3060         }
3061
3062         TALLOC_FREE(case_state);
3063
3064         /* All file access must go through check_name() */
3065
3066         status = check_name(conn, fname);
3067         if (!NT_STATUS_IS_OK(status)) {
3068                 goto fail;
3069         }
3070
3071         status = create_file_unixpath(
3072                 conn, req, fname, access_mask, share_access,
3073                 create_disposition, create_options, file_attributes,
3074                 oplock_request, allocation_size, sd, ea_list,
3075                 &fsp, &info, &sbuf);
3076
3077         if (!NT_STATUS_IS_OK(status)) {
3078                 goto fail;
3079         }
3080
3081  done:
3082         DEBUG(10, ("create_file: info=%d\n", info));
3083
3084         *result = fsp;
3085         if (pinfo != NULL) {
3086                 *pinfo = info;
3087         }
3088         if (psbuf != NULL) {
3089                 *psbuf = sbuf;
3090         }
3091         return NT_STATUS_OK;
3092
3093  fail:
3094         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3095
3096         if (fsp != NULL) {
3097                 close_file(req, fsp, ERROR_CLOSE);
3098                 fsp = NULL;
3099         }
3100         return status;
3101 }