source/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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 extern struct generic_mapping file_generic_mapping;
  26 extern struct current_user current_user;
  27 extern userdom_struct current_user_info;
  28 extern uint16 global_smbpid;
  29 extern BOOL global_client_failed_oplock_break;
  30
  31 struct deferred_open_record {
  32         BOOL delayed_for_oplocks;
  33         SMB_DEV_T dev;
  34         SMB_INO_T inode;
  35 };
  36
  37 /****************************************************************************
  38  fd support routines - attempt to do a dos_open.
  39 ****************************************************************************/
  40
  41 static NTSTATUS fd_open(struct connection_struct *conn,
  42                     const char *fname,
  43                     files_struct *fsp,
  44                     int flags,
  45                     mode_t mode)
  46 {
  47         NTSTATUS status = NT_STATUS_OK;
  48
  49 #ifdef O_NOFOLLOW
  50         /*
  51          * Never follow symlinks on a POSIX client. The
  52          * client should be doing this.
  53          */
  54
  55         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
  56                 flags |= O_NOFOLLOW;
  57         }
  58 #endif
  59
  60         fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
  61         if (fsp->fh->fd == -1) {
  62                 status = map_nt_error_from_unix(errno);
  63         }
  64
  65         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
  66                     fname, flags, (int)mode, fsp->fh->fd,
  67                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
  68
  69         return status;
  70 }
  71
  72 /****************************************************************************
  73  Close the file associated with a fsp.
  74 ****************************************************************************/
  75
  76 NTSTATUS fd_close(struct connection_struct *conn, files_struct *fsp)
  77 {
  78         if (fsp->fh->fd == -1) {
  79                 return NT_STATUS_OK; /* What we used to call a stat open. */
  80         }
  81         if (fsp->fh->ref_count > 1) {
  82                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
  83         }
  84         return fd_close_posix(conn, fsp);
  85 }
  86
  87 /****************************************************************************
  88  Change the ownership of a file to that of the parent directory.
  89  Do this by fd if possible.
  90 ****************************************************************************/
  91
  92 static void change_file_owner_to_parent(connection_struct *conn,
  93                                         const char *inherit_from_dir,
  94                                         files_struct *fsp)
  95 {
  96         SMB_STRUCT_STAT parent_st;
  97         int ret;
  98
  99         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 100         if (ret == -1) {
 101                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 102                          "directory %s. Error was %s\n",
 103                          inherit_from_dir, strerror(errno) ));
 104                 return;
 105         }
 106
 107         become_root();
 108         ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, parent_st.st_uid, (gid_t)-1);
 109         unbecome_root();
 110         if (ret == -1) {
 111                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 112                          "file %s to parent directory uid %u. Error "
 113                          "was %s\n", fsp->fsp_name,
 114                          (unsigned int)parent_st.st_uid,
 115                          strerror(errno) ));
 116         }
 117
 118         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 119                   "parent directory uid %u.\n", fsp->fsp_name,
 120                   (unsigned int)parent_st.st_uid ));
 121 }
 122
 123 static void change_dir_owner_to_parent(connection_struct *conn,
 124                                        const char *inherit_from_dir,
 125                                        const char *fname,
 126                                        SMB_STRUCT_STAT *psbuf)
 127 {
 128         pstring saved_dir;
 129         SMB_STRUCT_STAT sbuf;
 130         SMB_STRUCT_STAT parent_st;
 131         int ret;
 132
 133         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 134         if (ret == -1) {
 135                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 136                          "directory %s. Error was %s\n",
 137                          inherit_from_dir, strerror(errno) ));
 138                 return;
 139         }
 140
 141         /* We've already done an lstat into psbuf, and we know it's a
 142            directory. If we can cd into the directory and the dev/ino
 143            are the same then we can safely chown without races as
 144            we're locking the directory in place by being in it.  This
 145            should work on any UNIX (thanks tridge :-). JRA.
 146         */
 147
 148         if (!vfs_GetWd(conn,saved_dir)) {
 149                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 150                          "current working directory\n"));
 151                 return;
 152         }
 153
 154         /* Chdir into the new path. */
 155         if (vfs_ChDir(conn, fname) == -1) {
 156                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 157                          "current working directory to %s. Error "
 158                          "was %s\n", fname, strerror(errno) ));
 159                 goto out;
 160         }
 161
 162         if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
 163                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 164                          "directory '.' (%s) Error was %s\n",
 165                          fname, strerror(errno)));
 166                 goto out;
 167         }
 168
 169         /* Ensure we're pointing at the same place. */
 170         if (sbuf.st_dev != psbuf->st_dev ||
 171             sbuf.st_ino != psbuf->st_ino ||
 172             sbuf.st_mode != psbuf->st_mode ) {
 173                 DEBUG(0,("change_dir_owner_to_parent: "
 174                          "device/inode/mode on directory %s changed. "
 175                          "Refusing to chown !\n", fname ));
 176                 goto out;
 177         }
 178
 179         become_root();
 180         ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
 181         unbecome_root();
 182         if (ret == -1) {
 183                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 184                           "directory %s to parent directory uid %u. "
 185                           "Error was %s\n", fname,
 186                           (unsigned int)parent_st.st_uid, strerror(errno) ));
 187                 goto out;
 188         }
 189
 190         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 191                   "directory %s to parent directory uid %u.\n",
 192                   fname, (unsigned int)parent_st.st_uid ));
 193
 194  out:
 195
 196         vfs_ChDir(conn,saved_dir);
 197 }
 198
 199 /****************************************************************************
 200  Open a file.
 201 ****************************************************************************/
 202
 203 static NTSTATUS open_file(files_struct *fsp,
 204                           connection_struct *conn,
 205                           const char *parent_dir,
 206                           const char *name,
 207                           const char *path,
 208                           SMB_STRUCT_STAT *psbuf,
 209                           int flags,
 210                           mode_t unx_mode,
 211                           uint32 access_mask, /* client requested access mask. */
 212                           uint32 open_access_mask) /* what we're actually using in the open. */
 213 {
 214         NTSTATUS status = NT_STATUS_OK;
 215         int accmode = (flags & O_ACCMODE);
 216         int local_flags = flags;
 217         BOOL file_existed = VALID_STAT(*psbuf);
 218
 219         fsp->fh->fd = -1;
 220         errno = EPERM;
 221
 222         /* Check permissions */
 223
 224         /*
 225          * This code was changed after seeing a client open request
 226          * containing the open mode of (DENY_WRITE/read-only) with
 227          * the 'create if not exist' bit set. The previous code
 228          * would fail to open the file read only on a read-only share
 229          * as it was checking the flags parameter  directly against O_RDONLY,
 230          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 231          * JRA.
 232          */
 233
 234         if (!CAN_WRITE(conn)) {
 235                 /* It's a read-only share - fail if we wanted to write. */
 236                 if(accmode != O_RDONLY) {
 237                         DEBUG(3,("Permission denied opening %s\n", path));
 238                         return NT_STATUS_ACCESS_DENIED;
 239                 } else if(flags & O_CREAT) {
 240                         /* We don't want to write - but we must make sure that
 241                            O_CREAT doesn't create the file if we have write
 242                            access into the directory.
 243                         */
 244                         flags &= ~O_CREAT;
 245                         local_flags &= ~O_CREAT;
 246                 }
 247         }
 248
 249         /*
 250          * This little piece of insanity is inspired by the
 251          * fact that an NT client can open a file for O_RDONLY,
 252          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 253          * If the client *can* write to the file, then it expects to
 254          * truncate the file, even though it is opening for readonly.
 255          * Quicken uses this stupid trick in backup file creation...
 256          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 257          * for helping track this one down. It didn't bite us in 2.0.x
 258          * as we always opened files read-write in that release. JRA.
 259          */
 260
 261         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 262                 DEBUG(10,("open_file: truncate requested on read-only open "
 263                           "for file %s\n", path));
 264                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 265         }
 266
 267         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 268             (!file_existed && (local_flags & O_CREAT)) ||
 269             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 270
 271                 /*
 272                  * We can't actually truncate here as the file may be locked.
 273                  * open_file_ntcreate will take care of the truncate later. JRA.
 274                  */
 275
 276                 local_flags &= ~O_TRUNC;
 277
 278 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 279                 /*
 280                  * We would block on opening a FIFO with no one else on the
 281                  * other end. Do what we used to do and add O_NONBLOCK to the
 282                  * open flags. JRA.
 283                  */
 284
 285                 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
 286                         local_flags |= O_NONBLOCK;
 287                 }
 288 #endif
 289
 290                 /* Don't create files with Microsoft wildcard characters. */
 291                 if ((local_flags & O_CREAT) && !file_existed &&
 292                     ms_has_wild(path))  {
 293                         return NT_STATUS_OBJECT_NAME_INVALID;
 294                 }
 295
 296                 /* Actually do the open */
 297                 status = fd_open(conn, path, fsp, local_flags, unx_mode);
 298                 if (!NT_STATUS_IS_OK(status)) {
 299                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 300                                  "(flags=%d)\n",
 301                                  path,nt_errstr(status),local_flags,flags));
 302                         return status;
 303                 }
 304
 305                 if ((local_flags & O_CREAT) && !file_existed) {
 306
 307                         /* Inherit the ACL if required */
 308                         if (lp_inherit_perms(SNUM(conn))) {
 309                                 inherit_access_acl(conn, parent_dir, path,
 310                                                    unx_mode);
 311                         }
 312
 313                         /* Change the owner if required. */
 314                         if (lp_inherit_owner(SNUM(conn))) {
 315                                 change_file_owner_to_parent(conn, parent_dir,
 316                                                             fsp);
 317                         }
 318
 319                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 320                                      FILE_NOTIFY_CHANGE_FILE_NAME, path);
 321                 }
 322
 323         } else {
 324                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 325         }
 326
 327         if (!file_existed) {
 328                 int ret;
 329
 330                 if (fsp->fh->fd == -1) {
 331                         ret = SMB_VFS_STAT(conn, path, psbuf);
 332                 } else {
 333                         ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf);
 334                         /* If we have an fd, this stat should succeed. */
 335                         if (ret == -1) {
 336                                 DEBUG(0,("Error doing fstat on open file %s "
 337                                          "(%s)\n", path,strerror(errno) ));
 338                         }
 339                 }
 340
 341                 /* For a non-io open, this stat failing means file not found. JRA */
 342                 if (ret == -1) {
 343                         status = map_nt_error_from_unix(errno);
 344                         fd_close(conn, fsp);
 345                         return status;
 346                 }
 347         }
 348
 349         /*
 350          * POSIX allows read-only opens of directories. We don't
 351          * want to do this (we use a different code path for this)
 352          * so catch a directory open and return an EISDIR. JRA.
 353          */
 354
 355         if(S_ISDIR(psbuf->st_mode)) {
 356                 fd_close(conn, fsp);
 357                 errno = EISDIR;
 358                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 359         }
 360
 361         fsp->mode = psbuf->st_mode;
 362         fsp->inode = psbuf->st_ino;
 363         fsp->dev = psbuf->st_dev;
 364         fsp->vuid = current_user.vuid;
 365         fsp->file_pid = global_smbpid;
 366         fsp->can_lock = True;
 367         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 368         if (!CAN_WRITE(conn)) {
 369                 fsp->can_write = False;
 370         } else {
 371                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 372                         True : False;
 373         }
 374         fsp->print_file = False;
 375         fsp->modified = False;
 376         fsp->sent_oplock_break = NO_BREAK_SENT;
 377         fsp->is_directory = False;
 378         fsp->is_stat = False;
 379
 380         string_set(&fsp->fsp_name, path);
 381         fsp->wcp = NULL; /* Write cache pointer. */
 382
 383         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 384                  *current_user_info.smb_name ?
 385                  current_user_info.smb_name : conn->user,fsp->fsp_name,
 386                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 387                  conn->num_files_open + 1));
 388
 389         errno = 0;
 390         return NT_STATUS_OK;
 391 }
 392
 393 /*******************************************************************
 394  Return True if the filename is one of the special executable types.
 395 ********************************************************************/
 396
 397 static BOOL is_executable(const char *fname)
 398 {
 399         if ((fname = strrchr_m(fname,'.'))) {
 400                 if (strequal(fname,".com") ||
 401                     strequal(fname,".dll") ||
 402                     strequal(fname,".exe") ||
 403                     strequal(fname,".sym")) {
 404                         return True;
 405                 }
 406         }
 407         return False;
 408 }
 409
 410 /****************************************************************************
 411  Check if we can open a file with a share mode.
 412  Returns True if conflict, False if not.
 413 ****************************************************************************/
 414
 415 static BOOL share_conflict(struct share_mode_entry *entry,
 416                            uint32 access_mask,
 417                            uint32 share_access)
 418 {
 419         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 420                   "entry->share_access = 0x%x, "
 421                   "entry->private_options = 0x%x\n",
 422                   (unsigned int)entry->access_mask,
 423                   (unsigned int)entry->share_access,
 424                   (unsigned int)entry->private_options));
 425
 426         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 427                   (unsigned int)access_mask, (unsigned int)share_access));
 428
 429         if ((entry->access_mask & (FILE_WRITE_DATA|
 430                                    FILE_APPEND_DATA|
 431                                    FILE_READ_DATA|
 432                                    FILE_EXECUTE|
 433                                    DELETE_ACCESS)) == 0) {
 434                 DEBUG(10,("share_conflict: No conflict due to "
 435                           "entry->access_mask = 0x%x\n",
 436                           (unsigned int)entry->access_mask ));
 437                 return False;
 438         }
 439
 440         if ((access_mask & (FILE_WRITE_DATA|
 441                             FILE_APPEND_DATA|
 442                             FILE_READ_DATA|
 443                             FILE_EXECUTE|
 444                             DELETE_ACCESS)) == 0) {
 445                 DEBUG(10,("share_conflict: No conflict due to "
 446                           "access_mask = 0x%x\n",
 447                           (unsigned int)access_mask ));
 448                 return False;
 449         }
 450
 451 #if 1 /* JRA TEST - Superdebug. */
 452 #define CHECK_MASK(num, am, right, sa, share) \
 453         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 454                 (unsigned int)(num), (unsigned int)(am), \
 455                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 456         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 457                 (unsigned int)(num), (unsigned int)(sa), \
 458                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 459         if (((am) & (right)) && !((sa) & (share))) { \
 460                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 461 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 462                         (unsigned int)(share) )); \
 463                 return True; \
 464         }
 465 #else
 466 #define CHECK_MASK(num, am, right, sa, share) \
 467         if (((am) & (right)) && !((sa) & (share))) { \
 468                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 469 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 470                         (unsigned int)(share) )); \
 471                 return True; \
 472         }
 473 #endif
 474
 475         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 476                    share_access, FILE_SHARE_WRITE);
 477         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 478                    entry->share_access, FILE_SHARE_WRITE);
 479
 480         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 481                    share_access, FILE_SHARE_READ);
 482         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 483                    entry->share_access, FILE_SHARE_READ);
 484
 485         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 486                    share_access, FILE_SHARE_DELETE);
 487         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 488                    entry->share_access, FILE_SHARE_DELETE);
 489
 490         DEBUG(10,("share_conflict: No conflict.\n"));
 491         return False;
 492 }
 493
 494 #if defined(DEVELOPER)
 495 static void validate_my_share_entries(int num,
 496                                       struct share_mode_entry *share_entry)
 497 {
 498         files_struct *fsp;
 499
 500         if (!procid_is_me(&share_entry->pid)) {
 501                 return;
 502         }
 503
 504         if (is_deferred_open_entry(share_entry) &&
 505             !open_was_deferred(share_entry->op_mid)) {
 506                 pstring str;
 507                 pstr_sprintf(str, "Got a deferred entry without a request: "
 508                              "PANIC: %s\n", share_mode_str(num, share_entry));
 509                 smb_panic(str);
 510         }
 511
 512         if (!is_valid_share_mode_entry(share_entry)) {
 513                 return;
 514         }
 515
 516         fsp = file_find_dif(share_entry->dev, share_entry->inode,
 517                             share_entry->share_file_id);
 518         if (!fsp) {
 519                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 520                          share_mode_str(num, share_entry) ));
 521                 smb_panic("validate_my_share_entries: Cannot match a "
 522                           "share entry with an open file\n");
 523         }
 524
 525         if (is_deferred_open_entry(share_entry) ||
 526             is_unused_share_mode_entry(share_entry)) {
 527                 goto panic;
 528         }
 529
 530         if ((share_entry->op_type == NO_OPLOCK) &&
 531             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 532                 /* Someone has already written to it, but I haven't yet
 533                  * noticed */
 534                 return;
 535         }
 536
 537         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 538                 goto panic;
 539         }
 540
 541         return;
 542
 543  panic:
 544         {
 545                 pstring str;
 546                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 547                          share_mode_str(num, share_entry) ));
 548                 slprintf(str, sizeof(str)-1, "validate_my_share_entries: "
 549                          "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 550                          fsp->fsp_name, (unsigned int)fsp->oplock_type,
 551                          (unsigned int)share_entry->op_type );
 552                 smb_panic(str);
 553         }
 554 }
 555 #endif
 556
 557 static BOOL is_stat_open(uint32 access_mask)
 558 {
 559         return (access_mask &&
 560                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 561                                   FILE_WRITE_ATTRIBUTES))==0) &&
 562                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 563                                  FILE_WRITE_ATTRIBUTES)) != 0));
 564 }
 565
 566 /****************************************************************************
 567  Deal with share modes
 568  Invarient: Share mode must be locked on entry and exit.
 569  Returns -1 on error, or number of share modes on success (may be zero).
 570 ****************************************************************************/
 571
 572 static NTSTATUS open_mode_check(connection_struct *conn,
 573                                 const char *fname,
 574                                 struct share_mode_lock *lck,
 575                                 uint32 access_mask,
 576                                 uint32 share_access,
 577                                 uint32 create_options,
 578                                 BOOL *file_existed)
 579 {
 580         int i;
 581
 582         if(lck->num_share_modes == 0) {
 583                 return NT_STATUS_OK;
 584         }
 585
 586         *file_existed = True;
 587
 588         if (is_stat_open(access_mask)) {
 589                 /* Stat open that doesn't trigger oplock breaks or share mode
 590                  * checks... ! JRA. */
 591                 return NT_STATUS_OK;
 592         }
 593
 594         /* A delete on close prohibits everything */
 595
 596         if (lck->delete_on_close) {
 597                 return NT_STATUS_DELETE_PENDING;
 598         }
 599
 600         /*
 601          * Check if the share modes will give us access.
 602          */
 603
 604 #if defined(DEVELOPER)
 605         for(i = 0; i < lck->num_share_modes; i++) {
 606                 validate_my_share_entries(i, &lck->share_modes[i]);
 607         }
 608 #endif
 609
 610         if (!lp_share_modes(SNUM(conn))) {
 611                 return NT_STATUS_OK;
 612         }
 613
 614         /* Now we check the share modes, after any oplock breaks. */
 615         for(i = 0; i < lck->num_share_modes; i++) {
 616
 617                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 618                         continue;
 619                 }
 620
 621                 /* someone else has a share lock on it, check to see if we can
 622                  * too */
 623                 if (share_conflict(&lck->share_modes[i],
 624                                    access_mask, share_access)) {
 625                         return NT_STATUS_SHARING_VIOLATION;
 626                 }
 627         }
 628
 629         return NT_STATUS_OK;
 630 }
 631
 632 static BOOL is_delete_request(files_struct *fsp) {
 633         return ((fsp->access_mask == DELETE_ACCESS) &&
 634                 (fsp->oplock_type == NO_OPLOCK));
 635 }
 636
 637 /*
 638  * 1) No files open at all or internal open: Grant whatever the client wants.
 639  *
 640  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 641  *    request, break if the oplock around is a batch oplock. If it's another
 642  *    requested access type, break.
 643  *
 644  * 3) Only level2 around: Grant level2 and do nothing else.
 645  */
 646
 647 static BOOL delay_for_oplocks(struct share_mode_lock *lck,
 648                               files_struct *fsp,
 649                               int pass_number,
 650                               int oplock_request)
 651 {
 652         int i;
 653         struct share_mode_entry *exclusive = NULL;
 654         BOOL valid_entry = False;
 655         BOOL delay_it = False;
 656         BOOL have_level2 = False;
 657         NTSTATUS status;
 658         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 659
 660         if (oplock_request & INTERNAL_OPEN_ONLY) {
 661                 fsp->oplock_type = NO_OPLOCK;
 662         }
 663
 664         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 665                 return False;
 666         }
 667
 668         for (i=0; i<lck->num_share_modes; i++) {
 669
 670                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 671                         continue;
 672                 }
 673
 674                 /* At least one entry is not an invalid or deferred entry. */
 675                 valid_entry = True;
 676
 677                 if (pass_number == 1) {
 678                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 679                                 SMB_ASSERT(exclusive == NULL);
 680                                 exclusive = &lck->share_modes[i];
 681                         }
 682                 } else {
 683                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 684                                 SMB_ASSERT(exclusive == NULL);
 685                                 exclusive = &lck->share_modes[i];
 686                         }
 687                 }
 688
 689                 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
 690                         SMB_ASSERT(exclusive == NULL);
 691                         have_level2 = True;
 692                 }
 693         }
 694
 695         if (!valid_entry) {
 696                 /* All entries are placeholders or deferred.
 697                  * Directly grant whatever the client wants. */
 698                 if (fsp->oplock_type == NO_OPLOCK) {
 699                         /* Store a level2 oplock, but don't tell the client */
 700                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 701                 }
 702                 return False;
 703         }
 704
 705         if (exclusive != NULL) { /* Found an exclusive oplock */
 706                 SMB_ASSERT(!have_level2);
 707                 delay_it = is_delete_request(fsp) ?
 708                         BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
 709         }
 710
 711         if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
 712                 /* We can at most grant level2 as there are other
 713                  * level2 or NO_OPLOCK entries. */
 714                 fsp->oplock_type = LEVEL_II_OPLOCK;
 715         }
 716
 717         if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
 718                 /* Store a level2 oplock, but don't tell the client */
 719                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 720         }
 721
 722         if (!delay_it) {
 723                 return False;
 724         }
 725
 726         /*
 727          * Send a break message to the oplock holder and delay the open for
 728          * our client.
 729          */
 730
 731         DEBUG(10, ("Sending break request to PID %s\n",
 732                    procid_str_static(&exclusive->pid)));
 733         exclusive->op_mid = get_current_mid();
 734
 735         /* Create the message. */
 736         share_mode_entry_to_message(msg, exclusive);
 737
 738         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 739            don't want this set in the share mode struct pointed to by lck. */
 740
 741         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 742                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 743         }
 744
 745         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 746                                     MSG_SMB_BREAK_REQUEST,
 747                                     (uint8 *)msg,
 748                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 749         if (!NT_STATUS_IS_OK(status)) {
 750                 DEBUG(3, ("Could not send oplock break message: %s\n",
 751                           nt_errstr(status)));
 752         }
 753
 754         return True;
 755 }
 756
 757 static BOOL request_timed_out(struct timeval request_time,
 758                               struct timeval timeout)
 759 {
 760         struct timeval now, end_time;
 761         GetTimeOfDay(&now);
 762         end_time = timeval_sum(&request_time, &timeout);
 763         return (timeval_compare(&end_time, &now) < 0);
 764 }
 765
 766 /****************************************************************************
 767  Handle the 1 second delay in returning a SHARING_VIOLATION error.
 768 ****************************************************************************/
 769
 770 static void defer_open(struct share_mode_lock *lck,
 771                        struct timeval request_time,
 772                        struct timeval timeout,
 773                        struct deferred_open_record *state)
 774 {
 775         uint16 mid = get_current_mid();
 776         int i;
 777
 778         /* Paranoia check */
 779
 780         for (i=0; i<lck->num_share_modes; i++) {
 781                 struct share_mode_entry *e = &lck->share_modes[i];
 782
 783                 if (!is_deferred_open_entry(e)) {
 784                         continue;
 785                 }
 786
 787                 if (procid_is_me(&e->pid) && (e->op_mid == mid)) {
 788                         DEBUG(0, ("Trying to defer an already deferred "
 789                                   "request: mid=%d, exiting\n", mid));
 790                         exit_server("attempt to defer a deferred request");
 791                 }
 792         }
 793
 794         /* End paranoia check */
 795
 796         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
 797                   "open entry for mid %u\n",
 798                   (unsigned int)request_time.tv_sec,
 799                   (unsigned int)request_time.tv_usec,
 800                   (unsigned int)mid));
 801
 802         if (!push_deferred_smb_message(mid, request_time, timeout,
 803                                        (char *)state, sizeof(*state))) {
 804                 exit_server("push_deferred_smb_message failed");
 805         }
 806         add_deferred_open(lck, mid, request_time, state->dev, state->inode);
 807
 808         /*
 809          * Push the MID of this packet on the signing queue.
 810          * We only do this once, the first time we push the packet
 811          * onto the deferred open queue, as this has a side effect
 812          * of incrementing the response sequence number.
 813          */
 814
 815         srv_defer_sign_response(mid);
 816 }
 817
 818
 819 /****************************************************************************
 820  On overwrite open ensure that the attributes match.
 821 ****************************************************************************/
 822
 823 static BOOL open_match_attributes(connection_struct *conn,
 824                                   const char *path,
 825                                   uint32 old_dos_attr,
 826                                   uint32 new_dos_attr,
 827                                   mode_t existing_unx_mode,
 828                                   mode_t new_unx_mode,
 829                                   mode_t *returned_unx_mode)
 830 {
 831         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
 832
 833         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 834         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 835
 836         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
 837            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
 838                 *returned_unx_mode = new_unx_mode;
 839         } else {
 840                 *returned_unx_mode = (mode_t)0;
 841         }
 842
 843         DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
 844                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
 845                   "returned_unx_mode = 0%o\n",
 846                   path,
 847                   (unsigned int)old_dos_attr,
 848                   (unsigned int)existing_unx_mode,
 849                   (unsigned int)new_dos_attr,
 850                   (unsigned int)*returned_unx_mode ));
 851
 852         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 853         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 854                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
 855                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
 856                         return False;
 857                 }
 858         }
 859         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 860                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
 861                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
 862                         return False;
 863                 }
 864         }
 865         return True;
 866 }
 867
 868 /****************************************************************************
 869  Special FCB or DOS processing in the case of a sharing violation.
 870  Try and find a duplicated file handle.
 871 ****************************************************************************/
 872
 873 static files_struct *fcb_or_dos_open(connection_struct *conn,
 874                                      const char *fname, SMB_DEV_T dev,
 875                                      SMB_INO_T inode,
 876                                      uint32 access_mask,
 877                                      uint32 share_access,
 878                                      uint32 create_options)
 879 {
 880         files_struct *fsp;
 881         files_struct *dup_fsp;
 882
 883         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 884                  "file %s.\n", fname ));
 885
 886         for(fsp = file_find_di_first(dev, inode); fsp;
 887             fsp = file_find_di_next(fsp)) {
 888
 889                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 890                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 891                           "access_mask = 0x%x\n", fsp->fsp_name,
 892                           fsp->fh->fd, (unsigned int)fsp->vuid,
 893                           (unsigned int)fsp->file_pid,
 894                           (unsigned int)fsp->fh->private_options,
 895                           (unsigned int)fsp->access_mask ));
 896
 897                 if (fsp->fh->fd != -1 &&
 898                     fsp->vuid == current_user.vuid &&
 899                     fsp->file_pid == global_smbpid &&
 900                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 901                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 902                     (fsp->access_mask & FILE_WRITE_DATA) &&
 903                     strequal(fsp->fsp_name, fname)) {
 904                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 905                         break;
 906                 }
 907         }
 908
 909         if (!fsp) {
 910                 return NULL;
 911         }
 912
 913         /* quite an insane set of semantics ... */
 914         if (is_executable(fname) &&
 915             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 916                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 917                 return NULL;
 918         }
 919
 920         /* We need to duplicate this fsp. */
 921         if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
 922                                           create_options, &dup_fsp))) {
 923                 return NULL;
 924         }
 925
 926         return dup_fsp;
 927 }
 928
 929 /****************************************************************************
 930  Open a file with a share mode - old openX method - map into NTCreate.
 931 ****************************************************************************/
 932
 933 BOOL map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 934                                  uint32 *paccess_mask,
 935                                  uint32 *pshare_mode,
 936                                  uint32 *pcreate_disposition,
 937                                  uint32 *pcreate_options)
 938 {
 939         uint32 access_mask;
 940         uint32 share_mode;
 941         uint32 create_disposition;
 942         uint32 create_options = 0;
 943
 944         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 945                   "open_func = 0x%x\n",
 946                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 947
 948         /* Create the NT compatible access_mask. */
 949         switch (GET_OPENX_MODE(deny_mode)) {
 950                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 951                 case DOS_OPEN_RDONLY:
 952                         access_mask = FILE_GENERIC_READ;
 953                         break;
 954                 case DOS_OPEN_WRONLY:
 955                         access_mask = FILE_GENERIC_WRITE;
 956                         break;
 957                 case DOS_OPEN_RDWR:
 958                 case DOS_OPEN_FCB:
 959                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 960                         break;
 961                 default:
 962                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 963                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 964                         return False;
 965         }
 966
 967         /* Create the NT compatible create_disposition. */
 968         switch (open_func) {
 969                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 970                         create_disposition = FILE_CREATE;
 971                         break;
 972
 973                 case OPENX_FILE_EXISTS_OPEN:
 974                         create_disposition = FILE_OPEN;
 975                         break;
 976
 977                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
 978                         create_disposition = FILE_OPEN_IF;
 979                         break;
 980
 981                 case OPENX_FILE_EXISTS_TRUNCATE:
 982                         create_disposition = FILE_OVERWRITE;
 983                         break;
 984
 985                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
 986                         create_disposition = FILE_OVERWRITE_IF;
 987                         break;
 988
 989                 default:
 990                         /* From samba4 - to be confirmed. */
 991                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
 992                                 create_disposition = FILE_CREATE;
 993                                 break;
 994                         }
 995                         DEBUG(10,("map_open_params_to_ntcreate: bad "
 996                                   "open_func 0x%x\n", (unsigned int)open_func));
 997                         return False;
 998         }
 999
1000         /* Create the NT compatible share modes. */
1001         switch (GET_DENY_MODE(deny_mode)) {
1002                 case DENY_ALL:
1003                         share_mode = FILE_SHARE_NONE;
1004                         break;
1005
1006                 case DENY_WRITE:
1007                         share_mode = FILE_SHARE_READ;
1008                         break;
1009
1010                 case DENY_READ:
1011                         share_mode = FILE_SHARE_WRITE;
1012                         break;
1013
1014                 case DENY_NONE:
1015                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1016                         break;
1017
1018                 case DENY_DOS:
1019                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1020                         if (is_executable(fname)) {
1021                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1022                         } else {
1023                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1024                                         share_mode = FILE_SHARE_READ;
1025                                 } else {
1026                                         share_mode = FILE_SHARE_NONE;
1027                                 }
1028                         }
1029                         break;
1030
1031                 case DENY_FCB:
1032                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1033                         share_mode = FILE_SHARE_NONE;
1034                         break;
1035
1036                 default:
1037                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1038                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1039                         return False;
1040         }
1041
1042         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1043                   "share_mode = 0x%x, create_disposition = 0x%x, "
1044                   "create_options = 0x%x\n",
1045                   fname,
1046                   (unsigned int)access_mask,
1047                   (unsigned int)share_mode,
1048                   (unsigned int)create_disposition,
1049                   (unsigned int)create_options ));
1050
1051         if (paccess_mask) {
1052                 *paccess_mask = access_mask;
1053         }
1054         if (pshare_mode) {
1055                 *pshare_mode = share_mode;
1056         }
1057         if (pcreate_disposition) {
1058                 *pcreate_disposition = create_disposition;
1059         }
1060         if (pcreate_options) {
1061                 *pcreate_options = create_options;
1062         }
1063
1064         return True;
1065
1066 }
1067
1068 static void schedule_defer_open(struct share_mode_lock *lck, struct timeval request_time)
1069 {
1070         struct deferred_open_record state;
1071
1072         /* This is a relative time, added to the absolute
1073            request_time value to get the absolute timeout time.
1074            Note that if this is the second or greater time we enter
1075            this codepath for this particular request mid then
1076            request_time is left as the absolute time of the *first*
1077            time this request mid was processed. This is what allows
1078            the request to eventually time out. */
1079
1080         struct timeval timeout;
1081
1082         /* Normally the smbd we asked should respond within
1083          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1084          * the client did, give twice the timeout as a safety
1085          * measure here in case the other smbd is stuck
1086          * somewhere else. */
1087
1088         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1089
1090         /* Nothing actually uses state.delayed_for_oplocks
1091            but it's handy to differentiate in debug messages
1092            between a 30 second delay due to oplock break, and
1093            a 1 second delay for share mode conflicts. */
1094
1095         state.delayed_for_oplocks = True;
1096         state.dev = lck->dev;
1097         state.inode = lck->ino;
1098
1099         if (!request_timed_out(request_time, timeout)) {
1100                 defer_open(lck, request_time, timeout, &state);
1101         }
1102 }
1103
1104 /****************************************************************************
1105  Open a file with a share mode.
1106 ****************************************************************************/
1107
1108 NTSTATUS open_file_ntcreate(connection_struct *conn,
1109                             const char *fname,
1110                             SMB_STRUCT_STAT *psbuf,
1111                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1112                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1113                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1114                             uint32 create_options,      /* options such as delete on close. */
1115                             uint32 new_dos_attributes,  /* attributes used for new file. */
1116                             int oplock_request,         /* internal Samba oplock codes. */
1117                                                         /* Information (FILE_EXISTS etc.) */
1118                             int *pinfo,
1119                             files_struct **result)
1120 {
1121         int flags=0;
1122         int flags2=0;
1123         BOOL file_existed = VALID_STAT(*psbuf);
1124         BOOL def_acl = False;
1125         BOOL posix_open = False;
1126         BOOL new_file_created = False;
1127         SMB_DEV_T dev = 0;
1128         SMB_INO_T inode = 0;
1129         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1130         files_struct *fsp = NULL;
1131         mode_t new_unx_mode = (mode_t)0;
1132         mode_t unx_mode = (mode_t)0;
1133         int info;
1134         uint32 existing_dos_attributes = 0;
1135         struct pending_message_list *pml = NULL;
1136         uint16 mid = get_current_mid();
1137         struct timeval request_time = timeval_zero();
1138         struct share_mode_lock *lck = NULL;
1139         uint32 open_access_mask = access_mask;
1140         NTSTATUS status;
1141         int ret_flock;
1142         char *parent_dir;
1143         const char *newname;
1144
1145         if (conn->printer) {
1146                 /*
1147                  * Printers are handled completely differently.
1148                  * Most of the passed parameters are ignored.
1149                  */
1150
1151                 if (pinfo) {
1152                         *pinfo = FILE_WAS_CREATED;
1153                 }
1154
1155                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1156
1157                 return print_fsp_open(conn, fname, result);
1158         }
1159
1160         if (!parent_dirname_talloc(tmp_talloc_ctx(), fname, &parent_dir,
1161                                    &newname)) {
1162                 return NT_STATUS_NO_MEMORY;
1163         }
1164
1165         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1166                 posix_open = True;
1167                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1168                 new_dos_attributes = 0;
1169         } else {
1170                 /* We add aARCH to this as this mode is only used if the file is
1171                  * created new. */
1172                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1173                                      parent_dir);
1174         }
1175
1176         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1177                    "access_mask=0x%x share_access=0x%x "
1178                    "create_disposition = 0x%x create_options=0x%x "
1179                    "unix mode=0%o oplock_request=%d\n",
1180                    fname, new_dos_attributes, access_mask, share_access,
1181                    create_disposition, create_options, unx_mode,
1182                    oplock_request));
1183
1184         if ((pml = get_open_deferred_message(mid)) != NULL) {
1185                 struct deferred_open_record *state =
1186                         (struct deferred_open_record *)pml->private_data.data;
1187
1188                 /* Remember the absolute time of the original
1189                    request with this mid. We'll use it later to
1190                    see if this has timed out. */
1191
1192                 request_time = pml->request_time;
1193
1194                 /* Remove the deferred open entry under lock. */
1195                 lck = get_share_mode_lock(NULL, state->dev, state->inode, NULL, NULL);
1196                 if (lck == NULL) {
1197                         DEBUG(0, ("could not get share mode lock\n"));
1198                 } else {
1199                         del_deferred_open_entry(lck, mid);
1200                         TALLOC_FREE(lck);
1201                 }
1202
1203                 /* Ensure we don't reprocess this message. */
1204                 remove_deferred_open_smb_message(mid);
1205         }
1206
1207         status = check_name(conn, fname);
1208         if (!NT_STATUS_IS_OK(status)) {
1209                 return status;
1210         }
1211
1212         if (!posix_open) {
1213                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1214                 if (file_existed) {
1215                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1216                 }
1217         }
1218
1219         /* ignore any oplock requests if oplocks are disabled */
1220         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1221             IS_VETO_OPLOCK_PATH(conn, fname)) {
1222                 /* Mask off everything except the private Samba bits. */
1223                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1224         }
1225
1226         /* this is for OS/2 long file names - say we don't support them */
1227         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1228                 /* OS/2 Workplace shell fix may be main code stream in a later
1229                  * release. */
1230                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1231                          "supported.\n"));
1232                 if (use_nt_status()) {
1233                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1234                 }
1235                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1236         }
1237
1238         switch( create_disposition ) {
1239                 /*
1240                  * Currently we're using FILE_SUPERSEDE as the same as
1241                  * FILE_OVERWRITE_IF but they really are
1242                  * different. FILE_SUPERSEDE deletes an existing file
1243                  * (requiring delete access) then recreates it.
1244                  */
1245                 case FILE_SUPERSEDE:
1246                         /* If file exists replace/overwrite. If file doesn't
1247                          * exist create. */
1248                         flags2 |= (O_CREAT | O_TRUNC);
1249                         break;
1250
1251                 case FILE_OVERWRITE_IF:
1252                         /* If file exists replace/overwrite. If file doesn't
1253                          * exist create. */
1254                         flags2 |= (O_CREAT | O_TRUNC);
1255                         break;
1256
1257                 case FILE_OPEN:
1258                         /* If file exists open. If file doesn't exist error. */
1259                         if (!file_existed) {
1260                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1261                                          "requested for file %s and file "
1262                                          "doesn't exist.\n", fname ));
1263                                 errno = ENOENT;
1264                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1265                         }
1266                         break;
1267
1268                 case FILE_OVERWRITE:
1269                         /* If file exists overwrite. If file doesn't exist
1270                          * error. */
1271                         if (!file_existed) {
1272                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1273                                          "requested for file %s and file "
1274                                          "doesn't exist.\n", fname ));
1275                                 errno = ENOENT;
1276                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1277                         }
1278                         flags2 |= O_TRUNC;
1279                         break;
1280
1281                 case FILE_CREATE:
1282                         /* If file exists error. If file doesn't exist
1283                          * create. */
1284                         if (file_existed) {
1285                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1286                                          "requested for file %s and file "
1287                                          "already exists.\n", fname ));
1288                                 if (S_ISDIR(psbuf->st_mode)) {
1289                                         errno = EISDIR;
1290                                 } else {
1291                                         errno = EEXIST;
1292                                 }
1293                                 return map_nt_error_from_unix(errno);
1294                         }
1295                         flags2 |= (O_CREAT|O_EXCL);
1296                         break;
1297
1298                 case FILE_OPEN_IF:
1299                         /* If file exists open. If file doesn't exist
1300                          * create. */
1301                         flags2 |= O_CREAT;
1302                         break;
1303
1304                 default:
1305                         return NT_STATUS_INVALID_PARAMETER;
1306         }
1307
1308         /* We only care about matching attributes on file exists and
1309          * overwrite. */
1310
1311         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1312                              (create_disposition == FILE_OVERWRITE_IF))) {
1313                 if (!open_match_attributes(conn, fname,
1314                                            existing_dos_attributes,
1315                                            new_dos_attributes, psbuf->st_mode,
1316                                            unx_mode, &new_unx_mode)) {
1317                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1318                                  "for file %s (%x %x) (0%o, 0%o)\n",
1319                                  fname, existing_dos_attributes,
1320                                  new_dos_attributes,
1321                                  (unsigned int)psbuf->st_mode,
1322                                  (unsigned int)unx_mode ));
1323                         errno = EACCES;
1324                         return NT_STATUS_ACCESS_DENIED;
1325                 }
1326         }
1327
1328         /* This is a nasty hack - must fix... JRA. */
1329         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1330                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1331         }
1332
1333         /*
1334          * Convert GENERIC bits to specific bits.
1335          */
1336
1337         se_map_generic(&access_mask, &file_generic_mapping);
1338         open_access_mask = access_mask;
1339
1340         if (flags2 & O_TRUNC) {
1341                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1342         }
1343
1344         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1345                    "access_mask=0x%x\n", fname, access_mask ));
1346
1347         /*
1348          * Note that we ignore the append flag as append does not
1349          * mean the same thing under DOS and Unix.
1350          */
1351
1352         if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1353                 /* DENY_DOS opens are always underlying read-write on the
1354                    file handle, no matter what the requested access mask
1355                     says. */
1356                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1357                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1358                         flags = O_RDWR;
1359                 } else {
1360                         flags = O_WRONLY;
1361                 }
1362         } else {
1363                 flags = O_RDONLY;
1364         }
1365
1366         /*
1367          * Currently we only look at FILE_WRITE_THROUGH for create options.
1368          */
1369
1370 #if defined(O_SYNC)
1371         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1372                 flags2 |= O_SYNC;
1373         }
1374 #endif /* O_SYNC */
1375
1376         if (posix_open & (access_mask & FILE_APPEND_DATA)) {
1377                 flags2 |= O_APPEND;
1378         }
1379
1380         if (!posix_open && !CAN_WRITE(conn)) {
1381                 /*
1382                  * We should really return a permission denied error if either
1383                  * O_CREAT or O_TRUNC are set, but for compatibility with
1384                  * older versions of Samba we just AND them out.
1385                  */
1386                 flags2 &= ~(O_CREAT|O_TRUNC);
1387         }
1388
1389         /*
1390          * Ensure we can't write on a read-only share or file.
1391          */
1392
1393         if (flags != O_RDONLY && file_existed &&
1394             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1395                 DEBUG(5,("open_file_ntcreate: write access requested for "
1396                          "file %s on read only %s\n",
1397                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1398                 errno = EACCES;
1399                 return NT_STATUS_ACCESS_DENIED;
1400         }
1401
1402         status = file_new(conn, &fsp);
1403         if(!NT_STATUS_IS_OK(status)) {
1404                 return status;
1405         }
1406
1407         fsp->dev = psbuf->st_dev;
1408         fsp->inode = psbuf->st_ino;
1409         fsp->share_access = share_access;
1410         fsp->fh->private_options = create_options;
1411         fsp->access_mask = open_access_mask; /* We change this to the
1412                                               * requested access_mask after
1413                                               * the open is done. */
1414         fsp->posix_open = posix_open;
1415
1416         /* Ensure no SAMBA_PRIVATE bits can be set. */
1417         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1418
1419         if (timeval_is_zero(&request_time)) {
1420                 request_time = fsp->open_time;
1421         }
1422
1423         if (file_existed) {
1424                 dev = psbuf->st_dev;
1425                 inode = psbuf->st_ino;
1426
1427                 lck = get_share_mode_lock(NULL, dev, inode,
1428                                           conn->connectpath,
1429                                           fname);
1430
1431                 if (lck == NULL) {
1432                         file_free(fsp);
1433                         DEBUG(0, ("Could not get share mode lock\n"));
1434                         return NT_STATUS_SHARING_VIOLATION;
1435                 }
1436
1437                 /* First pass - send break only on batch oplocks. */
1438                 if (delay_for_oplocks(lck, fsp, 1, oplock_request)) {
1439                         schedule_defer_open(lck, request_time);
1440                         TALLOC_FREE(lck);
1441                         file_free(fsp);
1442                         return NT_STATUS_SHARING_VIOLATION;
1443                 }
1444
1445                 /* Use the client requested access mask here, not the one we
1446                  * open with. */
1447                 status = open_mode_check(conn, fname, lck,
1448                                          access_mask, share_access,
1449                                          create_options, &file_existed);
1450
1451                 if (NT_STATUS_IS_OK(status)) {
1452                         /* We might be going to allow this open. Check oplock
1453                          * status again. */
1454                         /* Second pass - send break for both batch or
1455                          * exclusive oplocks. */
1456                         if (delay_for_oplocks(lck, fsp, 2, oplock_request)) {
1457                                 schedule_defer_open(lck, request_time);
1458                                 TALLOC_FREE(lck);
1459                                 file_free(fsp);
1460                                 return NT_STATUS_SHARING_VIOLATION;
1461                         }
1462                 }
1463
1464                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1465                         /* DELETE_PENDING is not deferred for a second */
1466                         TALLOC_FREE(lck);
1467                         file_free(fsp);
1468                         return status;
1469                 }
1470
1471                 if (!NT_STATUS_IS_OK(status)) {
1472                         uint32 can_access_mask;
1473                         BOOL can_access = True;
1474
1475                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1476
1477                         /* Check if this can be done with the deny_dos and fcb
1478                          * calls. */
1479                         if (create_options &
1480                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1481                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1482                                 files_struct *fsp_dup;
1483
1484                                 /* Use the client requested access mask here,
1485                                  * not the one we open with. */
1486                                 fsp_dup = fcb_or_dos_open(conn, fname, dev,
1487                                                           inode, access_mask,
1488                                                           share_access,
1489                                                           create_options);
1490
1491                                 if (fsp_dup) {
1492                                         TALLOC_FREE(lck);
1493                                         file_free(fsp);
1494                                         if (pinfo) {
1495                                                 *pinfo = FILE_WAS_OPENED;
1496                                         }
1497                                         conn->num_files_open++;
1498                                         *result = fsp_dup;
1499                                         return NT_STATUS_OK;
1500                                 }
1501                         }
1502
1503                         /*
1504                          * This next line is a subtlety we need for
1505                          * MS-Access. If a file open will fail due to share
1506                          * permissions and also for security (access) reasons,
1507                          * we need to return the access failed error, not the
1508                          * share error. We can't open the file due to kernel
1509                          * oplock deadlock (it's possible we failed above on
1510                          * the open_mode_check()) so use a userspace check.
1511                          */
1512
1513                         if (flags & O_RDWR) {
1514                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1515                         } else if (flags & O_WRONLY) {
1516                                 can_access_mask = FILE_WRITE_DATA;
1517                         } else {
1518                                 can_access_mask = FILE_READ_DATA;
1519                         }
1520
1521                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1522                             !can_access_file(conn,fname,psbuf,can_access_mask)) {
1523                                 can_access = False;
1524                         }
1525
1526                         /*
1527                          * If we're returning a share violation, ensure we
1528                          * cope with the braindead 1 second delay.
1529                          */
1530
1531                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1532                             lp_defer_sharing_violations()) {
1533                                 struct timeval timeout;
1534                                 struct deferred_open_record state;
1535                                 int timeout_usecs;
1536
1537                                 /* this is a hack to speed up torture tests
1538                                    in 'make test' */
1539                                 timeout_usecs = lp_parm_int(SNUM(conn),
1540                                                             "smbd","sharedelay",
1541                                                             SHARING_VIOLATION_USEC_WAIT);
1542
1543                                 /* This is a relative time, added to the absolute
1544                                    request_time value to get the absolute timeout time.
1545                                    Note that if this is the second or greater time we enter
1546                                    this codepath for this particular request mid then
1547                                    request_time is left as the absolute time of the *first*
1548                                    time this request mid was processed. This is what allows
1549                                    the request to eventually time out. */
1550
1551                                 timeout = timeval_set(0, timeout_usecs);
1552
1553                                 /* Nothing actually uses state.delayed_for_oplocks
1554                                    but it's handy to differentiate in debug messages
1555                                    between a 30 second delay due to oplock break, and
1556                                    a 1 second delay for share mode conflicts. */
1557
1558                                 state.delayed_for_oplocks = False;
1559                                 state.dev = dev;
1560                                 state.inode = inode;
1561
1562                                 if (!request_timed_out(request_time,
1563                                                        timeout)) {
1564                                         defer_open(lck, request_time, timeout,
1565                                                    &state);
1566                                 }
1567                         }
1568
1569                         TALLOC_FREE(lck);
1570                         if (can_access) {
1571                                 /*
1572                                  * We have detected a sharing violation here
1573                                  * so return the correct error code
1574                                  */
1575                                 status = NT_STATUS_SHARING_VIOLATION;
1576                         } else {
1577                                 status = NT_STATUS_ACCESS_DENIED;
1578                         }
1579                         file_free(fsp);
1580                         return status;
1581                 }
1582
1583                 /*
1584                  * We exit this block with the share entry *locked*.....
1585                  */
1586         }
1587
1588         SMB_ASSERT(!file_existed || (lck != NULL));
1589
1590         /*
1591          * Ensure we pay attention to default ACLs on directories if required.
1592          */
1593
1594         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1595             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1596                 unx_mode = 0777;
1597         }
1598
1599         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1600                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1601                  (unsigned int)flags, (unsigned int)flags2,
1602                  (unsigned int)unx_mode, (unsigned int)access_mask,
1603                  (unsigned int)open_access_mask));
1604
1605         /*
1606          * open_file strips any O_TRUNC flags itself.
1607          */
1608
1609         fsp_open = open_file(fsp, conn, parent_dir, newname, fname, psbuf,
1610                              flags|flags2, unx_mode, access_mask,
1611                              open_access_mask);
1612
1613         if (!NT_STATUS_IS_OK(fsp_open)) {
1614                 if (lck != NULL) {
1615                         TALLOC_FREE(lck);
1616                 }
1617                 file_free(fsp);
1618                 return fsp_open;
1619         }
1620
1621         if (!file_existed) {
1622
1623                 /*
1624                  * Deal with the race condition where two smbd's detect the
1625                  * file doesn't exist and do the create at the same time. One
1626                  * of them will win and set a share mode, the other (ie. this
1627                  * one) should check if the requested share mode for this
1628                  * create is allowed.
1629                  */
1630
1631                 /*
1632                  * Now the file exists and fsp is successfully opened,
1633                  * fsp->dev and fsp->inode are valid and should replace the
1634                  * dev=0,inode=0 from a non existent file. Spotted by
1635                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1636                  */
1637
1638                 dev = fsp->dev;
1639                 inode = fsp->inode;
1640
1641                 lck = get_share_mode_lock(NULL, dev, inode,
1642                                           conn->connectpath,
1643                                           fname);
1644
1645                 if (lck == NULL) {
1646                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1647                                   "mode lock for %s\n", fname));
1648                         fd_close(conn, fsp);
1649                         file_free(fsp);
1650                         return NT_STATUS_SHARING_VIOLATION;
1651                 }
1652
1653                 status = open_mode_check(conn, fname, lck,
1654                                          access_mask, share_access,
1655                                          create_options, &file_existed);
1656
1657                 if (!NT_STATUS_IS_OK(status)) {
1658                         struct deferred_open_record state;
1659
1660                         fd_close(conn, fsp);
1661                         file_free(fsp);
1662
1663                         state.delayed_for_oplocks = False;
1664                         state.dev = dev;
1665                         state.inode = inode;
1666
1667                         /* Do it all over again immediately. In the second
1668                          * round we will find that the file existed and handle
1669                          * the DELETE_PENDING and FCB cases correctly. No need
1670                          * to duplicate the code here. Essentially this is a
1671                          * "goto top of this function", but don't tell
1672                          * anybody... */
1673
1674                         defer_open(lck, request_time, timeval_zero(),
1675                                    &state);
1676                         TALLOC_FREE(lck);
1677                         return status;
1678                 }
1679
1680                 /*
1681                  * We exit this block with the share entry *locked*.....
1682                  */
1683
1684         }
1685
1686         SMB_ASSERT(lck != NULL);
1687
1688         /* note that we ignore failure for the following. It is
1689            basically a hack for NFS, and NFS will never set one of
1690            these only read them. Nobody but Samba can ever set a deny
1691            mode and we have already checked our more authoritative
1692            locking database for permission to set this deny mode. If
1693            the kernel refuses the operations then the kernel is wrong.
1694            note that GPFS supports it as well - jmcd */
1695
1696         ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, fsp->fh->fd, share_access);
1697         if(ret_flock == -1 ){
1698
1699                 TALLOC_FREE(lck);
1700                 fd_close(conn, fsp);
1701                 file_free(fsp);
1702
1703                 return NT_STATUS_SHARING_VIOLATION;
1704         }
1705
1706         /*
1707          * At this point onwards, we can guarentee that the share entry
1708          * is locked, whether we created the file or not, and that the
1709          * deny mode is compatible with all current opens.
1710          */
1711
1712         /*
1713          * If requested, truncate the file.
1714          */
1715
1716         if (flags2&O_TRUNC) {
1717                 /*
1718                  * We are modifing the file after open - update the stat
1719                  * struct..
1720                  */
1721                 if ((SMB_VFS_FTRUNCATE(fsp,fsp->fh->fd,0) == -1) ||
1722                     (SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf)==-1)) {
1723                         status = map_nt_error_from_unix(errno);
1724                         TALLOC_FREE(lck);
1725                         fd_close(conn,fsp);
1726                         file_free(fsp);
1727                         return status;
1728                 }
1729         }
1730
1731         /* Record the options we were opened with. */
1732         fsp->share_access = share_access;
1733         fsp->fh->private_options = create_options;
1734         fsp->access_mask = access_mask;
1735
1736         if (file_existed) {
1737                 /* stat opens on existing files don't get oplocks. */
1738                 if (is_stat_open(open_access_mask)) {
1739                         fsp->oplock_type = NO_OPLOCK;
1740                 }
1741
1742                 if (!(flags2 & O_TRUNC)) {
1743                         info = FILE_WAS_OPENED;
1744                 } else {
1745                         info = FILE_WAS_OVERWRITTEN;
1746                 }
1747         } else {
1748                 info = FILE_WAS_CREATED;
1749         }
1750
1751         if (pinfo) {
1752                 *pinfo = info;
1753         }
1754
1755         /*
1756          * Setup the oplock info in both the shared memory and
1757          * file structs.
1758          */
1759
1760         if ((fsp->oplock_type != NO_OPLOCK) &&
1761             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1762                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1763                         /* Could not get the kernel oplock */
1764                         fsp->oplock_type = NO_OPLOCK;
1765                 }
1766         }
1767
1768         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1769                 new_file_created = True;
1770         }
1771
1772         set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type, new_file_created);
1773
1774         /* Handle strange delete on close create semantics. */
1775         if ((create_options & FILE_DELETE_ON_CLOSE) && can_set_initial_delete_on_close(lck)) {
1776                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1777
1778                 if (!NT_STATUS_IS_OK(status)) {
1779                         /* Remember to delete the mode we just added. */
1780                         del_share_mode(lck, fsp);
1781                         TALLOC_FREE(lck);
1782                         fd_close(conn,fsp);
1783                         file_free(fsp);
1784                         return status;
1785                 }
1786                 /* Note that here we set the *inital* delete on close flag,
1787                    not the regular one. The magic gets handled in close. */
1788                 fsp->initial_delete_on_close = True;
1789         }
1790
1791         if (new_file_created) {
1792                 /* Files should be initially set as archive */
1793                 if (lp_map_archive(SNUM(conn)) ||
1794                     lp_store_dos_attributes(SNUM(conn))) {
1795                         if (!posix_open) {
1796                                 file_set_dosmode(conn, fname,
1797                                          new_dos_attributes | aARCH, NULL,
1798                                          parent_dir);
1799                         }
1800                 }
1801         }
1802
1803         /*
1804          * Take care of inherited ACLs on created files - if default ACL not
1805          * selected.
1806          */
1807
1808         if (!posix_open && !file_existed && !def_acl) {
1809
1810                 int saved_errno = errno; /* We might get ENOSYS in the next
1811                                           * call.. */
1812
1813                 if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd, unx_mode) == -1 &&
1814                     errno == ENOSYS) {
1815                         errno = saved_errno; /* Ignore ENOSYS */
1816                 }
1817
1818         } else if (new_unx_mode) {
1819
1820                 int ret = -1;
1821
1822                 /* Attributes need changing. File already existed. */
1823
1824                 {
1825                         int saved_errno = errno; /* We might get ENOSYS in the
1826                                                   * next call.. */
1827                         ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd,
1828                                                  new_unx_mode);
1829
1830                         if (ret == -1 && errno == ENOSYS) {
1831                                 errno = saved_errno; /* Ignore ENOSYS */
1832                         } else {
1833                                 DEBUG(5, ("open_file_ntcreate: reset "
1834                                           "attributes of file %s to 0%o\n",
1835                                           fname, (unsigned int)new_unx_mode));
1836                                 ret = 0; /* Don't do the fchmod below. */
1837                         }
1838                 }
1839
1840                 if ((ret == -1) &&
1841                     (SMB_VFS_FCHMOD(fsp, fsp->fh->fd, new_unx_mode) == -1))
1842                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1843                                   "attributes of file %s to 0%o\n",
1844                                   fname, (unsigned int)new_unx_mode));
1845         }
1846
1847         /* If this is a successful open, we must remove any deferred open
1848          * records. */
1849         del_deferred_open_entry(lck, mid);
1850         TALLOC_FREE(lck);
1851
1852         conn->num_files_open++;
1853
1854         *result = fsp;
1855         return NT_STATUS_OK;
1856 }
1857
1858 /****************************************************************************
1859  Open a file for for write to ensure that we can fchmod it.
1860 ****************************************************************************/
1861
1862 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1863                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1864 {
1865         files_struct *fsp = NULL;
1866         NTSTATUS status;
1867
1868         if (!VALID_STAT(*psbuf)) {
1869                 return NT_STATUS_INVALID_PARAMETER;
1870         }
1871
1872         status = file_new(conn, &fsp);
1873         if(!NT_STATUS_IS_OK(status)) {
1874                 return status;
1875         }
1876
1877         /* note! we must use a non-zero desired access or we don't get
1878            a real file descriptor. Oh what a twisted web we weave. */
1879         status = open_file(fsp, conn, NULL, NULL, fname, psbuf, O_WRONLY, 0,
1880                            FILE_WRITE_DATA, FILE_WRITE_DATA);
1881
1882         /*
1883          * This is not a user visible file open.
1884          * Don't set a share mode and don't increment
1885          * the conn->num_files_open.
1886          */
1887
1888         if (!NT_STATUS_IS_OK(status)) {
1889                 file_free(fsp);
1890                 return status;
1891         }
1892
1893         *result = fsp;
1894         return NT_STATUS_OK;
1895 }
1896
1897 /****************************************************************************
1898  Close the fchmod file fd - ensure no locks are lost.
1899 ****************************************************************************/
1900
1901 NTSTATUS close_file_fchmod(files_struct *fsp)
1902 {
1903         NTSTATUS status = fd_close(fsp->conn, fsp);
1904         file_free(fsp);
1905         return status;
1906 }
1907
1908 static NTSTATUS mkdir_internal(connection_struct *conn,
1909                                 const char *name,
1910                                 uint32 file_attributes,
1911                                 SMB_STRUCT_STAT *psbuf)
1912 {
1913         mode_t mode;
1914         char *parent_dir;
1915         const char *dirname;
1916         NTSTATUS status;
1917
1918         if(!CAN_WRITE(conn)) {
1919                 DEBUG(5,("mkdir_internal: failing create on read-only share "
1920                          "%s\n", lp_servicename(SNUM(conn))));
1921                 return NT_STATUS_ACCESS_DENIED;
1922         }
1923
1924         status = check_name(conn, name);
1925         if (!NT_STATUS_IS_OK(status)) {
1926                 return status;
1927         }
1928
1929         if (!parent_dirname_talloc(tmp_talloc_ctx(), name, &parent_dir,
1930                                    &dirname)) {
1931                 return NT_STATUS_NO_MEMORY;
1932         }
1933
1934         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1935                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1936         } else {
1937                 mode = unix_mode(conn, aDIR, name, parent_dir);
1938         }
1939
1940         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
1941                 return map_nt_error_from_unix(errno);
1942         }
1943
1944         /* Ensure we're checking for a symlink here.... */
1945         /* We don't want to get caught by a symlink racer. */
1946
1947         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
1948                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
1949                           name, strerror(errno)));
1950                 return map_nt_error_from_unix(errno);
1951         }
1952
1953         if (!S_ISDIR(psbuf->st_mode)) {
1954                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
1955                           name));
1956                 return NT_STATUS_ACCESS_DENIED;
1957         }
1958
1959         if (lp_inherit_perms(SNUM(conn))) {
1960                 inherit_access_acl(conn, parent_dir, name, mode);
1961         }
1962
1963         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
1964                 /*
1965                  * Check if high bits should have been set,
1966                  * then (if bits are missing): add them.
1967                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
1968                  * dir.
1969                  */
1970                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
1971                         SMB_VFS_CHMOD(conn, name,
1972                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
1973                 }
1974         }
1975
1976         /* Change the owner if required. */
1977         if (lp_inherit_owner(SNUM(conn))) {
1978                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
1979         }
1980
1981         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
1982                      name);
1983
1984         return NT_STATUS_OK;
1985 }
1986
1987 /****************************************************************************
1988  Open a directory from an NT SMB call.
1989 ****************************************************************************/
1990
1991 NTSTATUS open_directory(connection_struct *conn,
1992                         const char *fname,
1993                         SMB_STRUCT_STAT *psbuf,
1994                         uint32 access_mask,
1995                         uint32 share_access,
1996                         uint32 create_disposition,
1997                         uint32 create_options,
1998                         uint32 file_attributes,
1999                         int *pinfo,
2000                         files_struct **result)
2001 {
2002         files_struct *fsp = NULL;
2003         BOOL dir_existed = VALID_STAT(*psbuf) ? True : False;
2004         struct share_mode_lock *lck = NULL;
2005         NTSTATUS status;
2006         int info = 0;
2007
2008         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2009                  "share_access = 0x%x create_options = 0x%x, "
2010                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2011                  fname,
2012                  (unsigned int)access_mask,
2013                  (unsigned int)share_access,
2014                  (unsigned int)create_options,
2015                  (unsigned int)create_disposition,
2016                  (unsigned int)file_attributes));
2017
2018         if (is_ntfs_stream_name(fname)) {
2019                 DEBUG(0,("open_directory: %s is a stream name!\n", fname ));
2020                 return NT_STATUS_NOT_A_DIRECTORY;
2021         }
2022
2023         switch( create_disposition ) {
2024                 case FILE_OPEN:
2025
2026                         info = FILE_WAS_OPENED;
2027
2028                         /*
2029                          * We want to follow symlinks here.
2030                          */
2031
2032                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2033                                 return map_nt_error_from_unix(errno);
2034                         }
2035
2036                         break;
2037
2038                 case FILE_CREATE:
2039
2040                         /* If directory exists error. If directory doesn't
2041                          * exist create. */
2042
2043                         status = mkdir_internal(conn,
2044                                                 fname,
2045                                                 file_attributes,
2046                                                 psbuf);
2047
2048                         if (!NT_STATUS_IS_OK(status)) {
2049                                 DEBUG(2, ("open_directory: unable to create "
2050                                           "%s. Error was %s\n", fname,
2051                                           nt_errstr(status)));
2052                                 return status;
2053                         }
2054
2055                         info = FILE_WAS_CREATED;
2056                         break;
2057
2058                 case FILE_OPEN_IF:
2059                         /*
2060                          * If directory exists open. If directory doesn't
2061                          * exist create.
2062                          */
2063
2064                         status = mkdir_internal(conn,
2065                                                 fname,
2066                                                 file_attributes,
2067                                                 psbuf);
2068
2069                         if (NT_STATUS_IS_OK(status)) {
2070                                 info = FILE_WAS_CREATED;
2071                         }
2072
2073                         if (NT_STATUS_EQUAL(status,
2074                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2075                                 info = FILE_WAS_OPENED;
2076                                 status = NT_STATUS_OK;
2077                         }
2078
2079                         break;
2080
2081                 case FILE_SUPERSEDE:
2082                 case FILE_OVERWRITE:
2083                 case FILE_OVERWRITE_IF:
2084                 default:
2085                         DEBUG(5,("open_directory: invalid create_disposition "
2086                                  "0x%x for directory %s\n",
2087                                  (unsigned int)create_disposition, fname));
2088                         return NT_STATUS_INVALID_PARAMETER;
2089         }
2090
2091         if(!S_ISDIR(psbuf->st_mode)) {
2092                 DEBUG(5,("open_directory: %s is not a directory !\n",
2093                          fname ));
2094                 return NT_STATUS_NOT_A_DIRECTORY;
2095         }
2096
2097         status = file_new(conn, &fsp);
2098         if(!NT_STATUS_IS_OK(status)) {
2099                 return status;
2100         }
2101
2102         /*
2103          * Setup the files_struct for it.
2104          */
2105
2106         fsp->mode = psbuf->st_mode;
2107         fsp->inode = psbuf->st_ino;
2108         fsp->dev = psbuf->st_dev;
2109         fsp->vuid = current_user.vuid;
2110         fsp->file_pid = global_smbpid;
2111         fsp->can_lock = False;
2112         fsp->can_read = False;
2113         fsp->can_write = False;
2114
2115         fsp->share_access = share_access;
2116         fsp->fh->private_options = create_options;
2117         fsp->access_mask = access_mask;
2118
2119         fsp->print_file = False;
2120         fsp->modified = False;
2121         fsp->oplock_type = NO_OPLOCK;
2122         fsp->sent_oplock_break = NO_BREAK_SENT;
2123         fsp->is_directory = True;
2124         fsp->is_stat = False;
2125         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2126
2127         string_set(&fsp->fsp_name,fname);
2128
2129         lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode,
2130                                   conn->connectpath,
2131                                   fname);
2132
2133         if (lck == NULL) {
2134                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2135                 file_free(fsp);
2136                 return NT_STATUS_SHARING_VIOLATION;
2137         }
2138
2139         status = open_mode_check(conn, fname, lck,
2140                                 access_mask, share_access,
2141                                 create_options, &dir_existed);
2142
2143         if (!NT_STATUS_IS_OK(status)) {
2144                 TALLOC_FREE(lck);
2145                 file_free(fsp);
2146                 return status;
2147         }
2148
2149         set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK, True);
2150
2151         /* For directories the delete on close bit at open time seems
2152            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2153         if (create_options & FILE_DELETE_ON_CLOSE) {
2154                 status = can_set_delete_on_close(fsp, True, 0);
2155                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2156                         TALLOC_FREE(lck);
2157                         file_free(fsp);
2158                         return status;
2159                 }
2160
2161                 if (NT_STATUS_IS_OK(status)) {
2162                         /* Note that here we set the *inital* delete on close flag,
2163                            not the regular one. The magic gets handled in close. */
2164                         fsp->initial_delete_on_close = True;
2165                 }
2166         }
2167
2168         TALLOC_FREE(lck);
2169
2170         if (pinfo) {
2171                 *pinfo = info;
2172         }
2173
2174         conn->num_files_open++;
2175
2176         *result = fsp;
2177         return NT_STATUS_OK;
2178 }
2179
2180 NTSTATUS create_directory(connection_struct *conn, const char *directory)
2181 {
2182         NTSTATUS status;
2183         SMB_STRUCT_STAT sbuf;
2184         files_struct *fsp;
2185
2186         SET_STAT_INVALID(sbuf);
2187
2188         status = open_directory(conn, directory, &sbuf,
2189                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2190                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2191                                 FILE_CREATE,
2192                                 0,
2193                                 FILE_ATTRIBUTE_DIRECTORY,
2194                                 NULL,
2195                                 &fsp);
2196
2197         if (NT_STATUS_IS_OK(status)) {
2198                 close_file(fsp, NORMAL_CLOSE);
2199         }
2200
2201         return status;
2202 }
2203
2204 /****************************************************************************
2205  Open a pseudo-file (no locking checks - a 'stat' open).
2206 ****************************************************************************/
2207
2208 NTSTATUS open_file_stat(connection_struct *conn, const char *fname,
2209                         SMB_STRUCT_STAT *psbuf, files_struct **result)
2210 {
2211         files_struct *fsp = NULL;
2212         NTSTATUS status;
2213
2214         if (!VALID_STAT(*psbuf)) {
2215                 return NT_STATUS_INVALID_PARAMETER;
2216         }
2217
2218         /* Can't 'stat' open directories. */
2219         if(S_ISDIR(psbuf->st_mode)) {
2220                 return NT_STATUS_FILE_IS_A_DIRECTORY;
2221         }
2222
2223         status = file_new(conn, &fsp);
2224         if(!NT_STATUS_IS_OK(status)) {
2225                 return status;
2226         }
2227
2228         DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2229
2230         /*
2231          * Setup the files_struct for it.
2232          */
2233
2234         fsp->mode = psbuf->st_mode;
2235         fsp->inode = psbuf->st_ino;
2236         fsp->dev = psbuf->st_dev;
2237         fsp->vuid = current_user.vuid;
2238         fsp->file_pid = global_smbpid;
2239         fsp->can_lock = False;
2240         fsp->can_read = False;
2241         fsp->can_write = False;
2242         fsp->print_file = False;
2243         fsp->modified = False;
2244         fsp->oplock_type = NO_OPLOCK;
2245         fsp->sent_oplock_break = NO_BREAK_SENT;
2246         fsp->is_directory = False;
2247         fsp->is_stat = True;
2248         string_set(&fsp->fsp_name,fname);
2249
2250         conn->num_files_open++;
2251
2252         *result = fsp;
2253         return NT_STATUS_OK;
2254 }
2255
2256 /****************************************************************************
2257  Receive notification that one of our open files has been renamed by another
2258  smbd process.
2259 ****************************************************************************/
2260
2261 void msg_file_was_renamed(struct messaging_context *msg,
2262                           void *private_data,
2263                           uint32_t msg_type,
2264                           struct server_id server_id,
2265                           DATA_BLOB *data)
2266 {
2267         files_struct *fsp;
2268         char *frm = (char *)data->data;
2269         SMB_DEV_T dev;
2270         SMB_INO_T inode;
2271         const char *sharepath;
2272         const char *newname;
2273         size_t sp_len;
2274
2275         if (data->data == NULL
2276             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2277                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2278                           data->length));
2279                 return;
2280         }
2281
2282         /* Unpack the message. */
2283         dev = DEV_T_VAL(frm,0);
2284         inode = INO_T_VAL(frm,8);
2285         sharepath = &frm[16];
2286         newname = sharepath + strlen(sharepath) + 1;
2287         sp_len = strlen(sharepath);
2288
2289         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2290                 "dev %x, inode  %.0f\n",
2291                 sharepath, newname, (unsigned int)dev, (double)inode ));
2292
2293         for(fsp = file_find_di_first(dev, inode); fsp; fsp = file_find_di_next(fsp)) {
2294                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2295                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2296                                 fsp->fnum, fsp->fsp_name, newname ));
2297                         string_set(&fsp->fsp_name, newname);
2298                 } else {
2299                         /* TODO. JRA. */
2300                         /* Now we have the complete path we can work out if this is
2301                            actually within this share and adjust newname accordingly. */
2302                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2303                                 "not sharepath %s) "
2304                                 "fnum %d from %s -> %s\n",
2305                                 fsp->conn->connectpath,
2306                                 sharepath,
2307                                 fsp->fnum,
2308                                 fsp->fsp_name,
2309                                 newname ));
2310                 }
2311         }
2312 }