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         /*
1365          * Convert GENERIC bits to specific bits.
1366          */
1367
1368         se_map_generic(&access_mask, &file_generic_mapping);
1369
1370         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1371         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1372                 if (file_existed) {
1373                         struct security_descriptor *sd;
1374                         uint32_t access_granted = 0;
1375
1376                         status = SMB_VFS_GET_NT_ACL(conn, fname,
1377                                         (OWNER_SECURITY_INFORMATION |
1378                                         GROUP_SECURITY_INFORMATION |
1379                                         DACL_SECURITY_INFORMATION),&sd);
1380
1381                         if (!NT_STATUS_IS_OK(status)) {
1382                                 DEBUG(10, ("open_file_ntcreate: Could not get acl "
1383                                         "on file %s: %s\n",
1384                                         fname,
1385                                         nt_errstr(status)));
1386                                 return NT_STATUS_ACCESS_DENIED;
1387                         }
1388
1389                         status = se_access_check(sd, conn->server_info->ptok,
1390                                         access_mask, &access_granted);
1391
1392                         TALLOC_FREE(sd);
1393
1394                         if (!NT_STATUS_IS_OK(status)) {
1395                                 DEBUG(10, ("open_file_ntcreate: Access denied on "
1396                                         "file %s: when calculating maximum access\n",
1397                                         fname));
1398                                 return NT_STATUS_ACCESS_DENIED;
1399                         }
1400
1401                         access_mask = access_granted;
1402                 } else {
1403                         access_mask = FILE_GENERIC_ALL;
1404                 }
1405         }
1406
1407         open_access_mask = access_mask;
1408
1409         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1410                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1411         }
1412
1413         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1414                    "access_mask=0x%x\n", fname, access_mask ));
1415
1416         /*
1417          * Note that we ignore the append flag as append does not
1418          * mean the same thing under DOS and Unix.
1419          */
1420
1421         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1422                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1423                 /* DENY_DOS opens are always underlying read-write on the
1424                    file handle, no matter what the requested access mask
1425                     says. */
1426                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1427                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1428                         flags = O_RDWR;
1429                 } else {
1430                         flags = O_WRONLY;
1431                 }
1432         } else {
1433                 flags = O_RDONLY;
1434         }
1435
1436         /*
1437          * Currently we only look at FILE_WRITE_THROUGH for create options.
1438          */
1439
1440 #if defined(O_SYNC)
1441         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1442                 flags2 |= O_SYNC;
1443         }
1444 #endif /* O_SYNC */
1445
1446         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1447                 flags2 |= O_APPEND;
1448         }
1449
1450         if (!posix_open && !CAN_WRITE(conn)) {
1451                 /*
1452                  * We should really return a permission denied error if either
1453                  * O_CREAT or O_TRUNC are set, but for compatibility with
1454                  * older versions of Samba we just AND them out.
1455                  */
1456                 flags2 &= ~(O_CREAT|O_TRUNC);
1457         }
1458
1459         /*
1460          * Ensure we can't write on a read-only share or file.
1461          */
1462
1463         if (flags != O_RDONLY && file_existed &&
1464             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1465                 DEBUG(5,("open_file_ntcreate: write access requested for "
1466                          "file %s on read only %s\n",
1467                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1468                 errno = EACCES;
1469                 return NT_STATUS_ACCESS_DENIED;
1470         }
1471
1472         status = file_new(req, conn, &fsp);
1473         if(!NT_STATUS_IS_OK(status)) {
1474                 return status;
1475         }
1476
1477         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1478         fsp->share_access = share_access;
1479         fsp->fh->private_options = create_options;
1480         fsp->access_mask = open_access_mask; /* We change this to the
1481                                               * requested access_mask after
1482                                               * the open is done. */
1483         fsp->posix_open = posix_open;
1484
1485         /* Ensure no SAMBA_PRIVATE bits can be set. */
1486         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1487
1488         if (timeval_is_zero(&request_time)) {
1489                 request_time = fsp->open_time;
1490         }
1491
1492         if (file_existed) {
1493                 struct timespec old_write_time = get_mtimespec(psbuf);
1494                 id = vfs_file_id_from_sbuf(conn, psbuf);
1495
1496                 lck = get_share_mode_lock(talloc_tos(), id,
1497                                           conn->connectpath,
1498                                           fname, &old_write_time);
1499
1500                 if (lck == NULL) {
1501                         file_free(req, fsp);
1502                         DEBUG(0, ("Could not get share mode lock\n"));
1503                         return NT_STATUS_SHARING_VIOLATION;
1504                 }
1505
1506                 /* First pass - send break only on batch oplocks. */
1507                 if ((req != NULL)
1508                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1509                                          oplock_request)) {
1510                         schedule_defer_open(lck, request_time, req);
1511                         TALLOC_FREE(lck);
1512                         file_free(req, fsp);
1513                         return NT_STATUS_SHARING_VIOLATION;
1514                 }
1515
1516                 /* Use the client requested access mask here, not the one we
1517                  * open with. */
1518                 status = open_mode_check(conn, fname, lck,
1519                                          access_mask, share_access,
1520                                          create_options, &file_existed);
1521
1522                 if (NT_STATUS_IS_OK(status)) {
1523                         /* We might be going to allow this open. Check oplock
1524                          * status again. */
1525                         /* Second pass - send break for both batch or
1526                          * exclusive oplocks. */
1527                         if ((req != NULL)
1528                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1529                                                   oplock_request)) {
1530                                 schedule_defer_open(lck, request_time, req);
1531                                 TALLOC_FREE(lck);
1532                                 file_free(req, fsp);
1533                                 return NT_STATUS_SHARING_VIOLATION;
1534                         }
1535                 }
1536
1537                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1538                         /* DELETE_PENDING is not deferred for a second */
1539                         TALLOC_FREE(lck);
1540                         file_free(req, fsp);
1541                         return status;
1542                 }
1543
1544                 if (!NT_STATUS_IS_OK(status)) {
1545                         uint32 can_access_mask;
1546                         bool can_access = True;
1547
1548                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1549
1550                         /* Check if this can be done with the deny_dos and fcb
1551                          * calls. */
1552                         if (create_options &
1553                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1554                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1555                                 files_struct *fsp_dup;
1556
1557                                 if (req == NULL) {
1558                                         DEBUG(0, ("DOS open without an SMB "
1559                                                   "request!\n"));
1560                                         TALLOC_FREE(lck);
1561                                         file_free(req, fsp);
1562                                         return NT_STATUS_INTERNAL_ERROR;
1563                                 }
1564
1565                                 /* Use the client requested access mask here,
1566                                  * not the one we open with. */
1567                                 fsp_dup = fcb_or_dos_open(req, conn, fname, id,
1568                                                           req->smbpid,
1569                                                           req->vuid,
1570                                                           access_mask,
1571                                                           share_access,
1572                                                           create_options);
1573
1574                                 if (fsp_dup) {
1575                                         TALLOC_FREE(lck);
1576                                         file_free(req, fsp);
1577                                         if (pinfo) {
1578                                                 *pinfo = FILE_WAS_OPENED;
1579                                         }
1580                                         conn->num_files_open++;
1581                                         *result = fsp_dup;
1582                                         return NT_STATUS_OK;
1583                                 }
1584                         }
1585
1586                         /*
1587                          * This next line is a subtlety we need for
1588                          * MS-Access. If a file open will fail due to share
1589                          * permissions and also for security (access) reasons,
1590                          * we need to return the access failed error, not the
1591                          * share error. We can't open the file due to kernel
1592                          * oplock deadlock (it's possible we failed above on
1593                          * the open_mode_check()) so use a userspace check.
1594                          */
1595
1596                         if (flags & O_RDWR) {
1597                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1598                         } else if (flags & O_WRONLY) {
1599                                 can_access_mask = FILE_WRITE_DATA;
1600                         } else {
1601                                 can_access_mask = FILE_READ_DATA;
1602                         }
1603
1604                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1605                             !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1606                                 can_access = False;
1607                         }
1608
1609                         /*
1610                          * If we're returning a share violation, ensure we
1611                          * cope with the braindead 1 second delay.
1612                          */
1613
1614                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1615                             lp_defer_sharing_violations()) {
1616                                 struct timeval timeout;
1617                                 struct deferred_open_record state;
1618                                 int timeout_usecs;
1619
1620                                 /* this is a hack to speed up torture tests
1621                                    in 'make test' */
1622                                 timeout_usecs = lp_parm_int(SNUM(conn),
1623                                                             "smbd","sharedelay",
1624                                                             SHARING_VIOLATION_USEC_WAIT);
1625
1626                                 /* This is a relative time, added to the absolute
1627                                    request_time value to get the absolute timeout time.
1628                                    Note that if this is the second or greater time we enter
1629                                    this codepath for this particular request mid then
1630                                    request_time is left as the absolute time of the *first*
1631                                    time this request mid was processed. This is what allows
1632                                    the request to eventually time out. */
1633
1634                                 timeout = timeval_set(0, timeout_usecs);
1635
1636                                 /* Nothing actually uses state.delayed_for_oplocks
1637                                    but it's handy to differentiate in debug messages
1638                                    between a 30 second delay due to oplock break, and
1639                                    a 1 second delay for share mode conflicts. */
1640
1641                                 state.delayed_for_oplocks = False;
1642                                 state.id = id;
1643
1644                                 if ((req != NULL)
1645                                     && !request_timed_out(request_time,
1646                                                           timeout)) {
1647                                         defer_open(lck, request_time, timeout,
1648                                                    req, &state);
1649                                 }
1650                         }
1651
1652                         TALLOC_FREE(lck);
1653                         if (can_access) {
1654                                 /*
1655                                  * We have detected a sharing violation here
1656                                  * so return the correct error code
1657                                  */
1658                                 status = NT_STATUS_SHARING_VIOLATION;
1659                         } else {
1660                                 status = NT_STATUS_ACCESS_DENIED;
1661                         }
1662                         file_free(req, fsp);
1663                         return status;
1664                 }
1665
1666                 /*
1667                  * We exit this block with the share entry *locked*.....
1668                  */
1669         }
1670
1671         SMB_ASSERT(!file_existed || (lck != NULL));
1672
1673         /*
1674          * Ensure we pay attention to default ACLs on directories if required.
1675          */
1676
1677         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1678             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1679                 unx_mode = 0777;
1680         }
1681
1682         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1683                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1684                  (unsigned int)flags, (unsigned int)flags2,
1685                  (unsigned int)unx_mode, (unsigned int)access_mask,
1686                  (unsigned int)open_access_mask));
1687
1688         /*
1689          * open_file strips any O_TRUNC flags itself.
1690          */
1691
1692         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1693                              flags|flags2, unx_mode, access_mask,
1694                              open_access_mask);
1695
1696         if (!NT_STATUS_IS_OK(fsp_open)) {
1697                 if (lck != NULL) {
1698                         TALLOC_FREE(lck);
1699                 }
1700                 file_free(req, fsp);
1701                 return fsp_open;
1702         }
1703
1704         if (!file_existed) {
1705                 struct timespec old_write_time = get_mtimespec(psbuf);
1706                 /*
1707                  * Deal with the race condition where two smbd's detect the
1708                  * file doesn't exist and do the create at the same time. One
1709                  * of them will win and set a share mode, the other (ie. this
1710                  * one) should check if the requested share mode for this
1711                  * create is allowed.
1712                  */
1713
1714                 /*
1715                  * Now the file exists and fsp is successfully opened,
1716                  * fsp->dev and fsp->inode are valid and should replace the
1717                  * dev=0,inode=0 from a non existent file. Spotted by
1718                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1719                  */
1720
1721                 id = fsp->file_id;
1722
1723                 lck = get_share_mode_lock(talloc_tos(), id,
1724                                           conn->connectpath,
1725                                           fname, &old_write_time);
1726
1727                 if (lck == NULL) {
1728                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1729                                   "mode lock for %s\n", fname));
1730                         fd_close(fsp);
1731                         file_free(req, fsp);
1732                         return NT_STATUS_SHARING_VIOLATION;
1733                 }
1734
1735                 /* First pass - send break only on batch oplocks. */
1736                 if ((req != NULL)
1737                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1738                                          oplock_request)) {
1739                         schedule_defer_open(lck, request_time, req);
1740                         TALLOC_FREE(lck);
1741                         fd_close(fsp);
1742                         file_free(req, fsp);
1743                         return NT_STATUS_SHARING_VIOLATION;
1744                 }
1745
1746                 status = open_mode_check(conn, fname, lck,
1747                                          access_mask, share_access,
1748                                          create_options, &file_existed);
1749
1750                 if (NT_STATUS_IS_OK(status)) {
1751                         /* We might be going to allow this open. Check oplock
1752                          * status again. */
1753                         /* Second pass - send break for both batch or
1754                          * exclusive oplocks. */
1755                         if ((req != NULL)
1756                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1757                                                  oplock_request)) {
1758                                 schedule_defer_open(lck, request_time, req);
1759                                 TALLOC_FREE(lck);
1760                                 fd_close(fsp);
1761                                 file_free(req, fsp);
1762                                 return NT_STATUS_SHARING_VIOLATION;
1763                         }
1764                 }
1765
1766                 if (!NT_STATUS_IS_OK(status)) {
1767                         struct deferred_open_record state;
1768
1769                         fd_close(fsp);
1770                         file_free(req, fsp);
1771
1772                         state.delayed_for_oplocks = False;
1773                         state.id = id;
1774
1775                         /* Do it all over again immediately. In the second
1776                          * round we will find that the file existed and handle
1777                          * the DELETE_PENDING and FCB cases correctly. No need
1778                          * to duplicate the code here. Essentially this is a
1779                          * "goto top of this function", but don't tell
1780                          * anybody... */
1781
1782                         if (req != NULL) {
1783                                 defer_open(lck, request_time, timeval_zero(),
1784                                            req, &state);
1785                         }
1786                         TALLOC_FREE(lck);
1787                         return status;
1788                 }
1789
1790                 /*
1791                  * We exit this block with the share entry *locked*.....
1792                  */
1793
1794         }
1795
1796         SMB_ASSERT(lck != NULL);
1797
1798         /* note that we ignore failure for the following. It is
1799            basically a hack for NFS, and NFS will never set one of
1800            these only read them. Nobody but Samba can ever set a deny
1801            mode and we have already checked our more authoritative
1802            locking database for permission to set this deny mode. If
1803            the kernel refuses the operations then the kernel is wrong.
1804            note that GPFS supports it as well - jmcd */
1805
1806         if (fsp->fh->fd != -1) {
1807                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1808                 if(ret_flock == -1 ){
1809
1810                         TALLOC_FREE(lck);
1811                         fd_close(fsp);
1812                         file_free(req, fsp);
1813
1814                         return NT_STATUS_SHARING_VIOLATION;
1815                 }
1816         }
1817
1818         /*
1819          * At this point onwards, we can guarentee that the share entry
1820          * is locked, whether we created the file or not, and that the
1821          * deny mode is compatible with all current opens.
1822          */
1823
1824         /*
1825          * If requested, truncate the file.
1826          */
1827
1828         if (flags2&O_TRUNC) {
1829                 /*
1830                  * We are modifing the file after open - update the stat
1831                  * struct..
1832                  */
1833                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1834                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1835                         status = map_nt_error_from_unix(errno);
1836                         TALLOC_FREE(lck);
1837                         fd_close(fsp);
1838                         file_free(req, fsp);
1839                         return status;
1840                 }
1841         }
1842
1843         /* Record the options we were opened with. */
1844         fsp->share_access = share_access;
1845         fsp->fh->private_options = create_options;
1846         /*
1847          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
1848          */
1849         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
1850
1851         if (file_existed) {
1852                 /* stat opens on existing files don't get oplocks. */
1853                 if (is_stat_open(open_access_mask)) {
1854                         fsp->oplock_type = NO_OPLOCK;
1855                 }
1856
1857                 if (!(flags2 & O_TRUNC)) {
1858                         info = FILE_WAS_OPENED;
1859                 } else {
1860                         info = FILE_WAS_OVERWRITTEN;
1861                 }
1862         } else {
1863                 info = FILE_WAS_CREATED;
1864         }
1865
1866         if (pinfo) {
1867                 *pinfo = info;
1868         }
1869
1870         /*
1871          * Setup the oplock info in both the shared memory and
1872          * file structs.
1873          */
1874
1875         if ((fsp->oplock_type != NO_OPLOCK) &&
1876             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1877                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1878                         /* Could not get the kernel oplock */
1879                         fsp->oplock_type = NO_OPLOCK;
1880                 }
1881         }
1882
1883         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1884                 new_file_created = True;
1885         }
1886
1887         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1888                        fsp->oplock_type, new_file_created);
1889
1890         /* Handle strange delete on close create semantics. */
1891         if ((create_options & FILE_DELETE_ON_CLOSE)
1892             && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1893                         && is_ntfs_stream_name(fname))
1894                 || can_set_initial_delete_on_close(lck))) {
1895                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1896
1897                 if (!NT_STATUS_IS_OK(status)) {
1898                         /* Remember to delete the mode we just added. */
1899                         del_share_mode(lck, fsp);
1900                         TALLOC_FREE(lck);
1901                         fd_close(fsp);
1902                         file_free(req, fsp);
1903                         return status;
1904                 }
1905                 /* Note that here we set the *inital* delete on close flag,
1906                    not the regular one. The magic gets handled in close. */
1907                 fsp->initial_delete_on_close = True;
1908         }
1909
1910         if (new_file_created) {
1911                 /* Files should be initially set as archive */
1912                 if (lp_map_archive(SNUM(conn)) ||
1913                     lp_store_dos_attributes(SNUM(conn))) {
1914                         if (!posix_open) {
1915                                 SMB_STRUCT_STAT tmp_sbuf;
1916                                 SET_STAT_INVALID(tmp_sbuf);
1917                                 if (file_set_dosmode(
1918                                             conn, fname,
1919                                             new_dos_attributes | aARCH,
1920                                             &tmp_sbuf, parent_dir,
1921                                             true) == 0) {
1922                                         unx_mode = tmp_sbuf.st_mode;
1923                                 }
1924                         }
1925                 }
1926         }
1927
1928         /*
1929          * Take care of inherited ACLs on created files - if default ACL not
1930          * selected.
1931          */
1932
1933         if (!posix_open && !file_existed && !def_acl) {
1934
1935                 int saved_errno = errno; /* We might get ENOSYS in the next
1936                                           * call.. */
1937
1938                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1939                     errno == ENOSYS) {
1940                         errno = saved_errno; /* Ignore ENOSYS */
1941                 }
1942
1943         } else if (new_unx_mode) {
1944
1945                 int ret = -1;
1946
1947                 /* Attributes need changing. File already existed. */
1948
1949                 {
1950                         int saved_errno = errno; /* We might get ENOSYS in the
1951                                                   * next call.. */
1952                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1953
1954                         if (ret == -1 && errno == ENOSYS) {
1955                                 errno = saved_errno; /* Ignore ENOSYS */
1956                         } else {
1957                                 DEBUG(5, ("open_file_ntcreate: reset "
1958                                           "attributes of file %s to 0%o\n",
1959                                           fname, (unsigned int)new_unx_mode));
1960                                 ret = 0; /* Don't do the fchmod below. */
1961                         }
1962                 }
1963
1964                 if ((ret == -1) &&
1965                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1966                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1967                                   "attributes of file %s to 0%o\n",
1968                                   fname, (unsigned int)new_unx_mode));
1969         }
1970
1971         /* If this is a successful open, we must remove any deferred open
1972          * records. */
1973         if (req != NULL) {
1974                 del_deferred_open_entry(lck, req->mid);
1975         }
1976         TALLOC_FREE(lck);
1977
1978         conn->num_files_open++;
1979
1980         *result = fsp;
1981         return NT_STATUS_OK;
1982 }
1983
1984 /****************************************************************************
1985  Open a file for for write to ensure that we can fchmod it.
1986 ****************************************************************************/
1987
1988 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
1989                           const char *fname,
1990                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1991 {
1992         files_struct *fsp = NULL;
1993         NTSTATUS status;
1994
1995         if (!VALID_STAT(*psbuf)) {
1996                 return NT_STATUS_INVALID_PARAMETER;
1997         }
1998
1999         status = file_new(req, conn, &fsp);
2000         if(!NT_STATUS_IS_OK(status)) {
2001                 return status;
2002         }
2003
2004         /* note! we must use a non-zero desired access or we don't get
2005            a real file descriptor. Oh what a twisted web we weave. */
2006         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
2007                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
2008
2009         /*
2010          * This is not a user visible file open.
2011          * Don't set a share mode and don't increment
2012          * the conn->num_files_open.
2013          */
2014
2015         if (!NT_STATUS_IS_OK(status)) {
2016                 file_free(req, fsp);
2017                 return status;
2018         }
2019
2020         *result = fsp;
2021         return NT_STATUS_OK;
2022 }
2023
2024 /****************************************************************************
2025  Close the fchmod file fd - ensure no locks are lost.
2026 ****************************************************************************/
2027
2028 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2029 {
2030         NTSTATUS status = fd_close(fsp);
2031         file_free(req, fsp);
2032         return status;
2033 }
2034
2035 static NTSTATUS mkdir_internal(connection_struct *conn,
2036                                 const char *name,
2037                                 uint32 file_attributes,
2038                                 SMB_STRUCT_STAT *psbuf)
2039 {
2040         mode_t mode;
2041         char *parent_dir;
2042         const char *dirname;
2043         NTSTATUS status;
2044         bool posix_open = false;
2045
2046         if(!CAN_WRITE(conn)) {
2047                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2048                          "%s\n", lp_servicename(SNUM(conn))));
2049                 return NT_STATUS_ACCESS_DENIED;
2050         }
2051
2052         status = check_name(conn, name);
2053         if (!NT_STATUS_IS_OK(status)) {
2054                 return status;
2055         }
2056
2057         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2058                                    &dirname)) {
2059                 return NT_STATUS_NO_MEMORY;
2060         }
2061
2062         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2063                 posix_open = true;
2064                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2065         } else {
2066                 mode = unix_mode(conn, aDIR, name, parent_dir);
2067         }
2068
2069         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2070                 return map_nt_error_from_unix(errno);
2071         }
2072
2073         /* Ensure we're checking for a symlink here.... */
2074         /* We don't want to get caught by a symlink racer. */
2075
2076         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2077                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2078                           name, strerror(errno)));
2079                 return map_nt_error_from_unix(errno);
2080         }
2081
2082         if (!S_ISDIR(psbuf->st_mode)) {
2083                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2084                           name));
2085                 return NT_STATUS_ACCESS_DENIED;
2086         }
2087
2088         if (lp_store_dos_attributes(SNUM(conn))) {
2089                 if (!posix_open) {
2090                         file_set_dosmode(conn, name,
2091                                  file_attributes | aDIR, NULL,
2092                                  parent_dir,
2093                                  true);
2094                 }
2095         }
2096
2097         if (lp_inherit_perms(SNUM(conn))) {
2098                 inherit_access_posix_acl(conn, parent_dir, name, mode);
2099         }
2100
2101         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2102                 /*
2103                  * Check if high bits should have been set,
2104                  * then (if bits are missing): add them.
2105                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2106                  * dir.
2107                  */
2108                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2109                         SMB_VFS_CHMOD(conn, name,
2110                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2111                 }
2112         }
2113
2114         /* Change the owner if required. */
2115         if (lp_inherit_owner(SNUM(conn))) {
2116                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2117         }
2118
2119         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2120                      name);
2121
2122         return NT_STATUS_OK;
2123 }
2124
2125 /****************************************************************************
2126  Open a directory from an NT SMB call.
2127 ****************************************************************************/
2128
2129 NTSTATUS open_directory(connection_struct *conn,
2130                         struct smb_request *req,
2131                         const char *fname,
2132                         SMB_STRUCT_STAT *psbuf,
2133                         uint32 access_mask,
2134                         uint32 share_access,
2135                         uint32 create_disposition,
2136                         uint32 create_options,
2137                         uint32 file_attributes,
2138                         int *pinfo,
2139                         files_struct **result)
2140 {
2141         files_struct *fsp = NULL;
2142         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2143         struct share_mode_lock *lck = NULL;
2144         NTSTATUS status;
2145         struct timespec mtimespec;
2146         int info = 0;
2147
2148         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2149                  "share_access = 0x%x create_options = 0x%x, "
2150                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2151                  fname,
2152                  (unsigned int)access_mask,
2153                  (unsigned int)share_access,
2154                  (unsigned int)create_options,
2155                  (unsigned int)create_disposition,
2156                  (unsigned int)file_attributes));
2157
2158         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2159                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2160                         is_ntfs_stream_name(fname)) {
2161                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2162                 return NT_STATUS_NOT_A_DIRECTORY;
2163         }
2164
2165         switch( create_disposition ) {
2166                 case FILE_OPEN:
2167
2168                         info = FILE_WAS_OPENED;
2169
2170                         /*
2171                          * We want to follow symlinks here.
2172                          */
2173
2174                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2175                                 return map_nt_error_from_unix(errno);
2176                         }
2177
2178                         break;
2179
2180                 case FILE_CREATE:
2181
2182                         /* If directory exists error. If directory doesn't
2183                          * exist create. */
2184
2185                         status = mkdir_internal(conn,
2186                                                 fname,
2187                                                 file_attributes,
2188                                                 psbuf);
2189
2190                         if (!NT_STATUS_IS_OK(status)) {
2191                                 DEBUG(2, ("open_directory: unable to create "
2192                                           "%s. Error was %s\n", fname,
2193                                           nt_errstr(status)));
2194                                 return status;
2195                         }
2196
2197                         info = FILE_WAS_CREATED;
2198                         break;
2199
2200                 case FILE_OPEN_IF:
2201                         /*
2202                          * If directory exists open. If directory doesn't
2203                          * exist create.
2204                          */
2205
2206                         status = mkdir_internal(conn,
2207                                                 fname,
2208                                                 file_attributes,
2209                                                 psbuf);
2210
2211                         if (NT_STATUS_IS_OK(status)) {
2212                                 info = FILE_WAS_CREATED;
2213                         }
2214
2215                         if (NT_STATUS_EQUAL(status,
2216                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2217                                 info = FILE_WAS_OPENED;
2218                                 status = NT_STATUS_OK;
2219                         }
2220
2221                         break;
2222
2223                 case FILE_SUPERSEDE:
2224                 case FILE_OVERWRITE:
2225                 case FILE_OVERWRITE_IF:
2226                 default:
2227                         DEBUG(5,("open_directory: invalid create_disposition "
2228                                  "0x%x for directory %s\n",
2229                                  (unsigned int)create_disposition, fname));
2230                         return NT_STATUS_INVALID_PARAMETER;
2231         }
2232
2233         if(!S_ISDIR(psbuf->st_mode)) {
2234                 DEBUG(5,("open_directory: %s is not a directory !\n",
2235                          fname ));
2236                 return NT_STATUS_NOT_A_DIRECTORY;
2237         }
2238
2239         status = file_new(req, conn, &fsp);
2240         if(!NT_STATUS_IS_OK(status)) {
2241                 return status;
2242         }
2243
2244         /*
2245          * Setup the files_struct for it.
2246          */
2247
2248         fsp->mode = psbuf->st_mode;
2249         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2250         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2251         fsp->file_pid = req ? req->smbpid : 0;
2252         fsp->can_lock = False;
2253         fsp->can_read = False;
2254         fsp->can_write = False;
2255
2256         fsp->share_access = share_access;
2257         fsp->fh->private_options = create_options;
2258         fsp->access_mask = access_mask;
2259
2260         fsp->print_file = False;
2261         fsp->modified = False;
2262         fsp->oplock_type = NO_OPLOCK;
2263         fsp->sent_oplock_break = NO_BREAK_SENT;
2264         fsp->is_directory = True;
2265         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2266
2267         string_set(&fsp->fsp_name,fname);
2268
2269         mtimespec = get_mtimespec(psbuf);
2270
2271         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2272                                   conn->connectpath,
2273                                   fname, &mtimespec);
2274
2275         if (lck == NULL) {
2276                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2277                 file_free(req, fsp);
2278                 return NT_STATUS_SHARING_VIOLATION;
2279         }
2280
2281         status = open_mode_check(conn, fname, lck,
2282                                 access_mask, share_access,
2283                                 create_options, &dir_existed);
2284
2285         if (!NT_STATUS_IS_OK(status)) {
2286                 TALLOC_FREE(lck);
2287                 file_free(req, fsp);
2288                 return status;
2289         }
2290
2291         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2292                        True);
2293
2294         /* For directories the delete on close bit at open time seems
2295            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2296         if (create_options & FILE_DELETE_ON_CLOSE) {
2297                 status = can_set_delete_on_close(fsp, True, 0);
2298                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2299                         TALLOC_FREE(lck);
2300                         file_free(req, fsp);
2301                         return status;
2302                 }
2303
2304                 if (NT_STATUS_IS_OK(status)) {
2305                         /* Note that here we set the *inital* delete on close flag,
2306                            not the regular one. The magic gets handled in close. */
2307                         fsp->initial_delete_on_close = True;
2308                 }
2309         }
2310
2311         TALLOC_FREE(lck);
2312
2313         if (pinfo) {
2314                 *pinfo = info;
2315         }
2316
2317         conn->num_files_open++;
2318
2319         *result = fsp;
2320         return NT_STATUS_OK;
2321 }
2322
2323 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2324 {
2325         NTSTATUS status;
2326         SMB_STRUCT_STAT sbuf;
2327         files_struct *fsp;
2328
2329         SET_STAT_INVALID(sbuf);
2330
2331         status = open_directory(conn, req, directory, &sbuf,
2332                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2333                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2334                                 FILE_CREATE,
2335                                 0,
2336                                 FILE_ATTRIBUTE_DIRECTORY,
2337                                 NULL,
2338                                 &fsp);
2339
2340         if (NT_STATUS_IS_OK(status)) {
2341                 close_file(req, fsp, NORMAL_CLOSE);
2342         }
2343
2344         return status;
2345 }
2346
2347 /****************************************************************************
2348  Receive notification that one of our open files has been renamed by another
2349  smbd process.
2350 ****************************************************************************/
2351
2352 void msg_file_was_renamed(struct messaging_context *msg,
2353                           void *private_data,
2354                           uint32_t msg_type,
2355                           struct server_id server_id,
2356                           DATA_BLOB *data)
2357 {
2358         files_struct *fsp;
2359         char *frm = (char *)data->data;
2360         struct file_id id;
2361         const char *sharepath;
2362         const char *newname;
2363         size_t sp_len;
2364
2365         if (data->data == NULL
2366             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2367                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2368                           (int)data->length));
2369                 return;
2370         }
2371
2372         /* Unpack the message. */
2373         pull_file_id_16(frm, &id);
2374         sharepath = &frm[16];
2375         newname = sharepath + strlen(sharepath) + 1;
2376         sp_len = strlen(sharepath);
2377
2378         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2379                 "file_id %s\n",
2380                   sharepath, newname, file_id_string_tos(&id)));
2381
2382         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2383                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2384                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2385                                 fsp->fnum, fsp->fsp_name, newname ));
2386                         string_set(&fsp->fsp_name, newname);
2387                 } else {
2388                         /* TODO. JRA. */
2389                         /* Now we have the complete path we can work out if this is
2390                            actually within this share and adjust newname accordingly. */
2391                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2392                                 "not sharepath %s) "
2393                                 "fnum %d from %s -> %s\n",
2394                                 fsp->conn->connectpath,
2395                                 sharepath,
2396                                 fsp->fnum,
2397                                 fsp->fsp_name,
2398                                 newname ));
2399                 }
2400         }
2401 }
2402
2403 struct case_semantics_state {
2404         connection_struct *conn;
2405         bool case_sensitive;
2406         bool case_preserve;
2407         bool short_case_preserve;
2408 };
2409
2410 /****************************************************************************
2411  Restore case semantics.
2412 ****************************************************************************/
2413 static int restore_case_semantics(struct case_semantics_state *state)
2414 {
2415         state->conn->case_sensitive = state->case_sensitive;
2416         state->conn->case_preserve = state->case_preserve;
2417         state->conn->short_case_preserve = state->short_case_preserve;
2418         return 0;
2419 }
2420
2421 /****************************************************************************
2422  Save case semantics.
2423 ****************************************************************************/
2424 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2425                                                              connection_struct *conn)
2426 {
2427         struct case_semantics_state *result;
2428
2429         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2430                 DEBUG(0, ("talloc failed\n"));
2431                 return NULL;
2432         }
2433
2434         result->conn = conn;
2435         result->case_sensitive = conn->case_sensitive;
2436         result->case_preserve = conn->case_preserve;
2437         result->short_case_preserve = conn->short_case_preserve;
2438
2439         /* Set to POSIX. */
2440         conn->case_sensitive = True;
2441         conn->case_preserve = True;
2442         conn->short_case_preserve = True;
2443
2444         talloc_set_destructor(result, restore_case_semantics);
2445
2446         return result;
2447 }
2448
2449 /*
2450  * If a main file is opened for delete, all streams need to be checked for
2451  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2452  * If that works, delete them all by setting the delete on close and close.
2453  */
2454
2455 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2456                                         const char *fname)
2457 {
2458         struct stream_struct *stream_info;
2459         files_struct **streams;
2460         int i;
2461         unsigned int num_streams;
2462         TALLOC_CTX *frame = talloc_stackframe();
2463         NTSTATUS status;
2464
2465         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2466                                     &num_streams, &stream_info);
2467
2468         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2469             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2470                 DEBUG(10, ("no streams around\n"));
2471                 TALLOC_FREE(frame);
2472                 return NT_STATUS_OK;
2473         }
2474
2475         if (!NT_STATUS_IS_OK(status)) {
2476                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2477                            nt_errstr(status)));
2478                 goto fail;
2479         }
2480
2481         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2482                    num_streams));
2483
2484         if (num_streams == 0) {
2485                 TALLOC_FREE(frame);
2486                 return NT_STATUS_OK;
2487         }
2488
2489         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2490         if (streams == NULL) {
2491                 DEBUG(0, ("talloc failed\n"));
2492                 status = NT_STATUS_NO_MEMORY;
2493                 goto fail;
2494         }
2495
2496         for (i=0; i<num_streams; i++) {
2497                 char *streamname;
2498
2499                 if (strequal(stream_info[i].name, "::$DATA")) {
2500                         streams[i] = NULL;
2501                         continue;
2502                 }
2503
2504                 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2505                                              stream_info[i].name);
2506
2507                 if (streamname == NULL) {
2508                         DEBUG(0, ("talloc_aprintf failed\n"));
2509                         status = NT_STATUS_NO_MEMORY;
2510                         goto fail;
2511                 }
2512
2513                 status = create_file_unixpath
2514                         (conn,                  /* conn */
2515                          NULL,                  /* req */
2516                          streamname,            /* fname */
2517                          DELETE_ACCESS,         /* access_mask */
2518                          FILE_SHARE_READ | FILE_SHARE_WRITE
2519                          | FILE_SHARE_DELETE,   /* share_access */
2520                          FILE_OPEN,             /* create_disposition*/
2521                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2522                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2523                          0,                     /* oplock_request */
2524                          0,                     /* allocation_size */
2525                          NULL,                  /* sd */
2526                          NULL,                  /* ea_list */
2527                          &streams[i],           /* result */
2528                          NULL,                  /* pinfo */
2529                          NULL);                 /* psbuf */
2530
2531                 TALLOC_FREE(streamname);
2532
2533                 if (!NT_STATUS_IS_OK(status)) {
2534                         DEBUG(10, ("Could not open stream %s: %s\n",
2535                                    streamname, nt_errstr(status)));
2536                         break;
2537                 }
2538         }
2539
2540         /*
2541          * don't touch the variable "status" beyond this point :-)
2542          */
2543
2544         for (i -= 1 ; i >= 0; i--) {
2545                 if (streams[i] == NULL) {
2546                         continue;
2547                 }
2548
2549                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2550                            streams[i]->fsp_name));
2551                 close_file(NULL, streams[i], NORMAL_CLOSE);
2552         }
2553
2554  fail:
2555         TALLOC_FREE(frame);
2556         return status;
2557 }
2558
2559 /*
2560  * Wrapper around open_file_ntcreate and open_directory
2561  */
2562
2563 NTSTATUS create_file_unixpath(connection_struct *conn,
2564                               struct smb_request *req,
2565                               const char *fname,
2566                               uint32_t access_mask,
2567                               uint32_t share_access,
2568                               uint32_t create_disposition,
2569                               uint32_t create_options,
2570                               uint32_t file_attributes,
2571                               uint32_t oplock_request,
2572                               uint64_t allocation_size,
2573                               struct security_descriptor *sd,
2574                               struct ea_list *ea_list,
2575
2576                               files_struct **result,
2577                               int *pinfo,
2578                               SMB_STRUCT_STAT *psbuf)
2579 {
2580         SMB_STRUCT_STAT sbuf;
2581         int info = FILE_WAS_OPENED;
2582         files_struct *base_fsp = NULL;
2583         files_struct *fsp = NULL;
2584         NTSTATUS status;
2585
2586         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2587                   "file_attributes = 0x%x, share_access = 0x%x, "
2588                   "create_disposition = 0x%x create_options = 0x%x "
2589                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2590                   "fname = %s\n",
2591                   (unsigned int)access_mask,
2592                   (unsigned int)file_attributes,
2593                   (unsigned int)share_access,
2594                   (unsigned int)create_disposition,
2595                   (unsigned int)create_options,
2596                   (unsigned int)oplock_request,
2597                   ea_list, sd, fname));
2598
2599         if (create_options & FILE_OPEN_BY_FILE_ID) {
2600                 status = NT_STATUS_NOT_SUPPORTED;
2601                 goto fail;
2602         }
2603
2604         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2605                 status = NT_STATUS_INVALID_PARAMETER;
2606                 goto fail;
2607         }
2608
2609         if (req == NULL) {
2610                 oplock_request |= INTERNAL_OPEN_ONLY;
2611         }
2612
2613         if (psbuf != NULL) {
2614                 sbuf = *psbuf;
2615         }
2616         else {
2617                 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2618                         SET_STAT_INVALID(sbuf);
2619                 }
2620         }
2621
2622         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2623             && (access_mask & DELETE_ACCESS)
2624             && !is_ntfs_stream_name(fname)) {
2625                 /*
2626                  * We can't open a file with DELETE access if any of the
2627                  * streams is open without FILE_SHARE_DELETE
2628                  */
2629                 status = open_streams_for_delete(conn, fname);
2630
2631                 if (!NT_STATUS_IS_OK(status)) {
2632                         goto fail;
2633                 }
2634         }
2635
2636         /* This is the correct thing to do (check every time) but can_delete
2637          * is expensive (it may have to read the parent directory
2638          * permissions). So for now we're not doing it unless we have a strong
2639          * hint the client is really going to delete this file. If the client
2640          * is forcing FILE_CREATE let the filesystem take care of the
2641          * permissions. */
2642
2643         /* Setting FILE_SHARE_DELETE is the hint. */
2644
2645         if (lp_acl_check_permissions(SNUM(conn))
2646             && (create_disposition != FILE_CREATE)
2647             && (share_access & FILE_SHARE_DELETE)
2648             && (access_mask & DELETE_ACCESS)
2649             && (!can_delete_file_in_directory(conn, fname))) {
2650                 status = NT_STATUS_ACCESS_DENIED;
2651                 goto fail;
2652         }
2653
2654 #if 0
2655         /* We need to support SeSecurityPrivilege for this. */
2656         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2657             !user_has_privileges(current_user.nt_user_token,
2658                                  &se_security)) {
2659                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2660                 goto fail;
2661         }
2662 #endif
2663
2664         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2665             && is_ntfs_stream_name(fname)
2666             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2667                 char *base;
2668                 uint32 base_create_disposition;
2669
2670                 if (create_options & FILE_DIRECTORY_FILE) {
2671                         status = NT_STATUS_NOT_A_DIRECTORY;
2672                         goto fail;
2673                 }
2674
2675                 status = split_ntfs_stream_name(talloc_tos(), fname,
2676                                                 &base, NULL);
2677                 if (!NT_STATUS_IS_OK(status)) {
2678                         DEBUG(10, ("create_file_unixpath: "
2679                                 "split_ntfs_stream_name failed: %s\n",
2680                                 nt_errstr(status)));
2681                         goto fail;
2682                 }
2683
2684                 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2685
2686                 switch (create_disposition) {
2687                 case FILE_OPEN:
2688                         base_create_disposition = FILE_OPEN;
2689                         break;
2690                 default:
2691                         base_create_disposition = FILE_OPEN_IF;
2692                         break;
2693                 }
2694
2695                 status = create_file_unixpath(conn, NULL, base, 0,
2696                                               FILE_SHARE_READ
2697                                               | FILE_SHARE_WRITE
2698                                               | FILE_SHARE_DELETE,
2699                                               base_create_disposition,
2700                                               0, 0, 0, 0, NULL, NULL,
2701                                               &base_fsp, NULL, NULL);
2702                 if (!NT_STATUS_IS_OK(status)) {
2703                         DEBUG(10, ("create_file_unixpath for base %s failed: "
2704                                    "%s\n", base, nt_errstr(status)));
2705                         goto fail;
2706                 }
2707         }
2708
2709         /*
2710          * If it's a request for a directory open, deal with it separately.
2711          */
2712
2713         if (create_options & FILE_DIRECTORY_FILE) {
2714
2715                 if (create_options & FILE_NON_DIRECTORY_FILE) {
2716                         status = NT_STATUS_INVALID_PARAMETER;
2717                         goto fail;
2718                 }
2719
2720                 /* Can't open a temp directory. IFS kit test. */
2721                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2722                         status = NT_STATUS_INVALID_PARAMETER;
2723                         goto fail;
2724                 }
2725
2726                 /*
2727                  * We will get a create directory here if the Win32
2728                  * app specified a security descriptor in the
2729                  * CreateDirectory() call.
2730                  */
2731
2732                 oplock_request = 0;
2733                 status = open_directory(
2734                         conn, req, fname, &sbuf, access_mask, share_access,
2735                         create_disposition, create_options, file_attributes,
2736                         &info, &fsp);
2737         } else {
2738
2739                 /*
2740                  * Ordinary file case.
2741                  */
2742
2743                 status = open_file_ntcreate(
2744                         conn, req, fname, &sbuf, access_mask, share_access,
2745                         create_disposition, create_options, file_attributes,
2746                         oplock_request, &info, &fsp);
2747
2748                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2749
2750                         /*
2751                          * Fail the open if it was explicitly a non-directory
2752                          * file.
2753                          */
2754
2755                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2756                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2757                                 goto fail;
2758                         }
2759
2760                         oplock_request = 0;
2761                         status = open_directory(
2762                                 conn, req, fname, &sbuf, access_mask,
2763                                 share_access, create_disposition,
2764                                 create_options, file_attributes,
2765                                 &info, &fsp);
2766                 }
2767         }
2768
2769         if (!NT_STATUS_IS_OK(status)) {
2770                 goto fail;
2771         }
2772
2773         /*
2774          * According to the MS documentation, the only time the security
2775          * descriptor is applied to the opened file is iff we *created* the
2776          * file; an existing file stays the same.
2777          *
2778          * Also, it seems (from observation) that you can open the file with
2779          * any access mask but you can still write the sd. We need to override
2780          * the granted access before we call set_sd
2781          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2782          */
2783
2784         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2785             && lp_nt_acl_support(SNUM(conn))) {
2786
2787                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2788                 uint32_t saved_access_mask = fsp->access_mask;
2789
2790                 if (sd->owner_sid == NULL) {
2791                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2792                 }
2793                 if (sd->group_sid == NULL) {
2794                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2795                 }
2796                 if (sd->sacl == NULL) {
2797                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2798                 }
2799                 if (sd->dacl == NULL) {
2800                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2801                 }
2802
2803                 fsp->access_mask = FILE_GENERIC_ALL;
2804
2805                 /* Convert all the generic bits. */
2806                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2807                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2808
2809                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2810
2811                 fsp->access_mask = saved_access_mask;
2812
2813                 if (!NT_STATUS_IS_OK(status)) {
2814                         goto fail;
2815                 }
2816         }
2817
2818         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2819                 status = set_ea(conn, fsp, fname, ea_list);
2820                 if (!NT_STATUS_IS_OK(status)) {
2821                         goto fail;
2822                 }
2823         }
2824
2825         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2826                 status = NT_STATUS_ACCESS_DENIED;
2827                 goto fail;
2828         }
2829
2830         /* Save the requested allocation size. */
2831         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2832                 if (allocation_size
2833                     && (allocation_size > sbuf.st_size)) {
2834                         fsp->initial_allocation_size = smb_roundup(
2835                                 fsp->conn, allocation_size);
2836                         if (fsp->is_directory) {
2837                                 /* Can't set allocation size on a directory. */
2838                                 status = NT_STATUS_ACCESS_DENIED;
2839                                 goto fail;
2840                         }
2841                         if (vfs_allocate_file_space(
2842                                     fsp, fsp->initial_allocation_size) == -1) {
2843                                 status = NT_STATUS_DISK_FULL;
2844                                 goto fail;
2845                         }
2846                 } else {
2847                         fsp->initial_allocation_size = smb_roundup(
2848                                 fsp->conn, (uint64_t)sbuf.st_size);
2849                 }
2850         }
2851
2852         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2853
2854         /*
2855          * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2856          * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2857          * also close fsp->base_fsp which we have to also do explicitly in
2858          * this routine here, as not in all "goto fail:" we have the fsp set
2859          * up already to be initialized with the base_fsp.
2860          */
2861
2862         fsp->base_fsp = base_fsp;
2863
2864         *result = fsp;
2865         if (pinfo != NULL) {
2866                 *pinfo = info;
2867         }
2868         if (psbuf != NULL) {
2869                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2870                         *psbuf = sbuf;
2871                 }
2872                 else {
2873                         SMB_VFS_FSTAT(fsp, psbuf);
2874                 }
2875         }
2876         return NT_STATUS_OK;
2877
2878  fail:
2879         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2880
2881         if (fsp != NULL) {
2882                 close_file(req, fsp, ERROR_CLOSE);
2883                 fsp = NULL;
2884         }
2885         if (base_fsp != NULL) {
2886                 close_file(req, base_fsp, ERROR_CLOSE);
2887                 base_fsp = NULL;
2888         }
2889         return status;
2890 }
2891
2892 NTSTATUS create_file(connection_struct *conn,
2893                      struct smb_request *req,
2894                      uint16_t root_dir_fid,
2895                      const char *fname,
2896                      uint32_t access_mask,
2897                      uint32_t share_access,
2898                      uint32_t create_disposition,
2899                      uint32_t create_options,
2900                      uint32_t file_attributes,
2901                      uint32_t oplock_request,
2902                      uint64_t allocation_size,
2903                      struct security_descriptor *sd,
2904                      struct ea_list *ea_list,
2905
2906                      files_struct **result,
2907                      int *pinfo,
2908                      SMB_STRUCT_STAT *psbuf)
2909 {
2910         struct case_semantics_state *case_state = NULL;
2911         SMB_STRUCT_STAT sbuf;
2912         int info = FILE_WAS_OPENED;
2913         files_struct *fsp = NULL;
2914         NTSTATUS status;
2915
2916         DEBUG(10,("create_file: access_mask = 0x%x "
2917                   "file_attributes = 0x%x, share_access = 0x%x, "
2918                   "create_disposition = 0x%x create_options = 0x%x "
2919                   "oplock_request = 0x%x "
2920                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2921                   "fname = %s\n",
2922                   (unsigned int)access_mask,
2923                   (unsigned int)file_attributes,
2924                   (unsigned int)share_access,
2925                   (unsigned int)create_disposition,
2926                   (unsigned int)create_options,
2927                   (unsigned int)oplock_request,
2928                   (unsigned int)root_dir_fid,
2929                   ea_list, sd, fname));
2930
2931         /*
2932          * Get the file name.
2933          */
2934
2935         if (root_dir_fid != 0) {
2936                 /*
2937                  * This filename is relative to a directory fid.
2938                  */
2939                 char *parent_fname = NULL;
2940                 files_struct *dir_fsp = file_fsp(req, root_dir_fid);
2941
2942                 if (dir_fsp == NULL) {
2943                         status = NT_STATUS_INVALID_HANDLE;
2944                         goto fail;
2945                 }
2946
2947                 if (!dir_fsp->is_directory) {
2948
2949                         /*
2950                          * Check to see if this is a mac fork of some kind.
2951                          */
2952
2953                         if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2954                                         is_ntfs_stream_name(fname)) {
2955                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2956                                 goto fail;
2957                         }
2958
2959                         /*
2960                           we need to handle the case when we get a
2961                           relative open relative to a file and the
2962                           pathname is blank - this is a reopen!
2963                           (hint from demyn plantenberg)
2964                         */
2965
2966                         status = NT_STATUS_INVALID_HANDLE;
2967                         goto fail;
2968                 }
2969
2970                 if (ISDOT(dir_fsp->fsp_name)) {
2971                         /*
2972                          * We're at the toplevel dir, the final file name
2973                          * must not contain ./, as this is filtered out
2974                          * normally by srvstr_get_path and unix_convert
2975                          * explicitly rejects paths containing ./.
2976                          */
2977                         parent_fname = talloc_strdup(talloc_tos(), "");
2978                         if (parent_fname == NULL) {
2979                                 status = NT_STATUS_NO_MEMORY;
2980                                 goto fail;
2981                         }
2982                 } else {
2983                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2984
2985                         /*
2986                          * Copy in the base directory name.
2987                          */
2988
2989                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2990                                                     dir_name_len+2);
2991                         if (parent_fname == NULL) {
2992                                 status = NT_STATUS_NO_MEMORY;
2993                                 goto fail;
2994                         }
2995                         memcpy(parent_fname, dir_fsp->fsp_name,
2996                                dir_name_len+1);
2997
2998                         /*
2999                          * Ensure it ends in a '/'.
3000                          * We used TALLOC_SIZE +2 to add space for the '/'.
3001                          */
3002
3003                         if(dir_name_len
3004                            && (parent_fname[dir_name_len-1] != '\\')
3005                            && (parent_fname[dir_name_len-1] != '/')) {
3006                                 parent_fname[dir_name_len] = '/';
3007                                 parent_fname[dir_name_len+1] = '\0';
3008                         }
3009                 }
3010
3011                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3012                                         fname);
3013                 if (fname == NULL) {
3014                         status = NT_STATUS_NO_MEMORY;
3015                         goto fail;
3016                 }
3017         }
3018
3019         /*
3020          * Check to see if this is a mac fork of some kind.
3021          */
3022
3023         if (is_ntfs_stream_name(fname)) {
3024                 enum FAKE_FILE_TYPE fake_file_type;
3025
3026                 fake_file_type = is_fake_file(fname);
3027
3028                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3029
3030                         /*
3031                          * Here we go! support for changing the disk quotas
3032                          * --metze
3033                          *
3034                          * We need to fake up to open this MAGIC QUOTA file
3035                          * and return a valid FID.
3036                          *
3037                          * w2k close this file directly after openening xp
3038                          * also tries a QUERY_FILE_INFO on the file and then
3039                          * close it
3040                          */
3041                         status = open_fake_file(req, conn, req->vuid,
3042                                                 fake_file_type, fname,
3043                                                 access_mask, &fsp);
3044                         if (!NT_STATUS_IS_OK(status)) {
3045                                 goto fail;
3046                         }
3047
3048                         ZERO_STRUCT(sbuf);
3049                         goto done;
3050                 }
3051
3052                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3053                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3054                         goto fail;
3055                 }
3056         }
3057
3058         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3059                 char *resolved_fname;
3060
3061                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3062                                          &resolved_fname);
3063
3064                 if (!NT_STATUS_IS_OK(status)) {
3065                         /*
3066                          * For PATH_NOT_COVERED we had
3067                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3068                          *                 ERRSRV, ERRbadpath);
3069                          * Need to fix in callers
3070                          */
3071                         goto fail;
3072                 }
3073                 fname = resolved_fname;
3074         }
3075
3076         /*
3077          * Check if POSIX semantics are wanted.
3078          */
3079
3080         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3081                 case_state = set_posix_case_semantics(talloc_tos(), conn);
3082                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3083         }
3084
3085         {
3086                 char *converted_fname;
3087
3088                 SET_STAT_INVALID(sbuf);
3089
3090                 status = unix_convert(talloc_tos(), conn, fname, False,
3091                                       &converted_fname, NULL, &sbuf);
3092                 if (!NT_STATUS_IS_OK(status)) {
3093                         goto fail;
3094                 }
3095                 fname = converted_fname;
3096         }
3097
3098         TALLOC_FREE(case_state);
3099
3100         /* All file access must go through check_name() */
3101
3102         status = check_name(conn, fname);
3103         if (!NT_STATUS_IS_OK(status)) {
3104                 goto fail;
3105         }
3106
3107         status = create_file_unixpath(
3108                 conn, req, fname, access_mask, share_access,
3109                 create_disposition, create_options, file_attributes,
3110                 oplock_request, allocation_size, sd, ea_list,
3111                 &fsp, &info, &sbuf);
3112
3113         if (!NT_STATUS_IS_OK(status)) {
3114                 goto fail;
3115         }
3116
3117  done:
3118         DEBUG(10, ("create_file: info=%d\n", info));
3119
3120         *result = fsp;
3121         if (pinfo != NULL) {
3122                 *pinfo = info;
3123         }
3124         if (psbuf != NULL) {
3125                 *psbuf = sbuf;
3126         }
3127         return NT_STATUS_OK;
3128
3129  fail:
3130         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3131
3132         if (fsp != NULL) {
3133                 close_file(req, fsp, ERROR_CLOSE);
3134                 fsp = NULL;
3135         }
3136         return status;
3137 }