source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern const struct generic_mapping file_generic_mapping;
  25 extern bool global_client_failed_oplock_break;
  26
  27 struct deferred_open_record {
  28         bool delayed_for_oplocks;
  29         struct file_id id;
  30 };
  31
  32 /****************************************************************************
  33  fd support routines - attempt to do a dos_open.
  34 ****************************************************************************/
  35
  36 static NTSTATUS fd_open(struct connection_struct *conn,
  37                     const char *fname,
  38                     files_struct *fsp,
  39                     int flags,
  40                     mode_t mode)
  41 {
  42         NTSTATUS status = NT_STATUS_OK;
  43
  44 #ifdef O_NOFOLLOW
  45         /*
  46          * Never follow symlinks on a POSIX client. The
  47          * client should be doing this.
  48          */
  49
  50         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
  51                 flags |= O_NOFOLLOW;
  52         }
  53 #endif
  54
  55         fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
  56         if (fsp->fh->fd == -1) {
  57                 status = map_nt_error_from_unix(errno);
  58         }
  59
  60         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
  61                     fname, flags, (int)mode, fsp->fh->fd,
  62                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
  63
  64         return status;
  65 }
  66
  67 /****************************************************************************
  68  Close the file associated with a fsp.
  69 ****************************************************************************/
  70
  71 NTSTATUS fd_close(files_struct *fsp)
  72 {
  73         int ret;
  74
  75         if (fsp->fh->fd == -1) {
  76                 return NT_STATUS_OK; /* What we used to call a stat open. */
  77         }
  78         if (fsp->fh->ref_count > 1) {
  79                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
  80         }
  81
  82         ret = SMB_VFS_CLOSE(fsp);
  83         fsp->fh->fd = -1;
  84         if (ret == -1) {
  85                 return map_nt_error_from_unix(errno);
  86         }
  87         return NT_STATUS_OK;
  88 }
  89
  90 /****************************************************************************
  91  Change the ownership of a file to that of the parent directory.
  92  Do this by fd if possible.
  93 ****************************************************************************/
  94
  95 static void change_file_owner_to_parent(connection_struct *conn,
  96                                         const char *inherit_from_dir,
  97                                         files_struct *fsp)
  98 {
  99         SMB_STRUCT_STAT parent_st;
 100         int ret;
 101
 102         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 103         if (ret == -1) {
 104                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 105                          "directory %s. Error was %s\n",
 106                          inherit_from_dir, strerror(errno) ));
 107                 return;
 108         }
 109
 110         become_root();
 111         ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
 112         unbecome_root();
 113         if (ret == -1) {
 114                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 115                          "file %s to parent directory uid %u. Error "
 116                          "was %s\n", fsp->fsp_name,
 117                          (unsigned int)parent_st.st_uid,
 118                          strerror(errno) ));
 119         }
 120
 121         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 122                   "parent directory uid %u.\n", fsp->fsp_name,
 123                   (unsigned int)parent_st.st_uid ));
 124 }
 125
 126 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 127                                        const char *inherit_from_dir,
 128                                        const char *fname,
 129                                        SMB_STRUCT_STAT *psbuf)
 130 {
 131         char *saved_dir = NULL;
 132         SMB_STRUCT_STAT sbuf;
 133         SMB_STRUCT_STAT parent_st;
 134         TALLOC_CTX *ctx = talloc_tos();
 135         NTSTATUS status = NT_STATUS_OK;
 136         int ret;
 137
 138         ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
 139         if (ret == -1) {
 140                 status = map_nt_error_from_unix(errno);
 141                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 142                          "directory %s. Error was %s\n",
 143                          inherit_from_dir, strerror(errno) ));
 144                 return status;
 145         }
 146
 147         /* We've already done an lstat into psbuf, and we know it's a
 148            directory. If we can cd into the directory and the dev/ino
 149            are the same then we can safely chown without races as
 150            we're locking the directory in place by being in it.  This
 151            should work on any UNIX (thanks tridge :-). JRA.
 152         */
 153
 154         saved_dir = vfs_GetWd(ctx,conn);
 155         if (!saved_dir) {
 156                 status = map_nt_error_from_unix(errno);
 157                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 158                          "current working directory. Error was %s\n",
 159                          strerror(errno)));
 160                 return status;
 161         }
 162
 163         /* Chdir into the new path. */
 164         if (vfs_ChDir(conn, fname) == -1) {
 165                 status = map_nt_error_from_unix(errno);
 166                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 167                          "current working directory to %s. Error "
 168                          "was %s\n", fname, strerror(errno) ));
 169                 goto out;
 170         }
 171
 172         if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
 173                 status = map_nt_error_from_unix(errno);
 174                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 175                          "directory '.' (%s) Error was %s\n",
 176                          fname, strerror(errno)));
 177                 goto out;
 178         }
 179
 180         /* Ensure we're pointing at the same place. */
 181         if (sbuf.st_dev != psbuf->st_dev ||
 182             sbuf.st_ino != psbuf->st_ino ||
 183             sbuf.st_mode != psbuf->st_mode ) {
 184                 DEBUG(0,("change_dir_owner_to_parent: "
 185                          "device/inode/mode on directory %s changed. "
 186                          "Refusing to chown !\n", fname ));
 187                 status = NT_STATUS_ACCESS_DENIED;
 188                 goto out;
 189         }
 190
 191         become_root();
 192         ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
 193         unbecome_root();
 194         if (ret == -1) {
 195                 status = map_nt_error_from_unix(errno);
 196                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 197                           "directory %s to parent directory uid %u. "
 198                           "Error was %s\n", fname,
 199                           (unsigned int)parent_st.st_uid, strerror(errno) ));
 200                 goto out;
 201         }
 202
 203         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 204                   "directory %s to parent directory uid %u.\n",
 205                   fname, (unsigned int)parent_st.st_uid ));
 206
 207  out:
 208
 209         vfs_ChDir(conn,saved_dir);
 210         return status;
 211 }
 212
 213 /****************************************************************************
 214  Open a file.
 215 ****************************************************************************/
 216
 217 static NTSTATUS open_file(files_struct *fsp,
 218                           connection_struct *conn,
 219                           struct smb_request *req,
 220                           const char *parent_dir,
 221                           const char *name,
 222                           const char *path,
 223                           SMB_STRUCT_STAT *psbuf,
 224                           int flags,
 225                           mode_t unx_mode,
 226                           uint32 access_mask, /* client requested access mask. */
 227                           uint32 open_access_mask) /* what we're actually using in the open. */
 228 {
 229         NTSTATUS status = NT_STATUS_OK;
 230         int accmode = (flags & O_ACCMODE);
 231         int local_flags = flags;
 232         bool file_existed = VALID_STAT(*psbuf);
 233
 234         fsp->fh->fd = -1;
 235         errno = EPERM;
 236
 237         /* Check permissions */
 238
 239         /*
 240          * This code was changed after seeing a client open request
 241          * containing the open mode of (DENY_WRITE/read-only) with
 242          * the 'create if not exist' bit set. The previous code
 243          * would fail to open the file read only on a read-only share
 244          * as it was checking the flags parameter  directly against O_RDONLY,
 245          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 246          * JRA.
 247          */
 248
 249         if (!CAN_WRITE(conn)) {
 250                 /* It's a read-only share - fail if we wanted to write. */
 251                 if(accmode != O_RDONLY) {
 252                         DEBUG(3,("Permission denied opening %s\n", path));
 253                         return NT_STATUS_ACCESS_DENIED;
 254                 } else if(flags & O_CREAT) {
 255                         /* We don't want to write - but we must make sure that
 256                            O_CREAT doesn't create the file if we have write
 257                            access into the directory.
 258                         */
 259                         flags &= ~O_CREAT;
 260                         local_flags &= ~O_CREAT;
 261                 }
 262         }
 263
 264         /*
 265          * This little piece of insanity is inspired by the
 266          * fact that an NT client can open a file for O_RDONLY,
 267          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 268          * If the client *can* write to the file, then it expects to
 269          * truncate the file, even though it is opening for readonly.
 270          * Quicken uses this stupid trick in backup file creation...
 271          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 272          * for helping track this one down. It didn't bite us in 2.0.x
 273          * as we always opened files read-write in that release. JRA.
 274          */
 275
 276         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 277                 DEBUG(10,("open_file: truncate requested on read-only open "
 278                           "for file %s\n", path));
 279                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 280         }
 281
 282         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 283             (!file_existed && (local_flags & O_CREAT)) ||
 284             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 285
 286                 /*
 287                  * We can't actually truncate here as the file may be locked.
 288                  * open_file_ntcreate will take care of the truncate later. JRA.
 289                  */
 290
 291                 local_flags &= ~O_TRUNC;
 292
 293 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 294                 /*
 295                  * We would block on opening a FIFO with no one else on the
 296                  * other end. Do what we used to do and add O_NONBLOCK to the
 297                  * open flags. JRA.
 298                  */
 299
 300                 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
 301                         local_flags |= O_NONBLOCK;
 302                 }
 303 #endif
 304
 305                 /* Don't create files with Microsoft wildcard characters. */
 306                 if ((local_flags & O_CREAT) && !file_existed &&
 307                     ms_has_wild(path))  {
 308                         return NT_STATUS_OBJECT_NAME_INVALID;
 309                 }
 310
 311                 /* Actually do the open */
 312                 status = fd_open(conn, path, fsp, local_flags, unx_mode);
 313                 if (!NT_STATUS_IS_OK(status)) {
 314                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 315                                  "(flags=%d)\n",
 316                                  path,nt_errstr(status),local_flags,flags));
 317                         return status;
 318                 }
 319
 320                 if ((local_flags & O_CREAT) && !file_existed) {
 321
 322                         /* Inherit the ACL if required */
 323                         if (lp_inherit_perms(SNUM(conn))) {
 324                                 inherit_access_posix_acl(conn, parent_dir, path,
 325                                                    unx_mode);
 326                         }
 327
 328                         /* Change the owner if required. */
 329                         if (lp_inherit_owner(SNUM(conn))) {
 330                                 change_file_owner_to_parent(conn, parent_dir,
 331                                                             fsp);
 332                         }
 333
 334                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 335                                      FILE_NOTIFY_CHANGE_FILE_NAME, path);
 336                 }
 337
 338         } else {
 339                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 340         }
 341
 342         if (!file_existed) {
 343                 int ret;
 344
 345                 if (fsp->fh->fd == -1) {
 346                         ret = SMB_VFS_STAT(conn, path, psbuf);
 347                 } else {
 348                         ret = SMB_VFS_FSTAT(fsp, psbuf);
 349                         /* If we have an fd, this stat should succeed. */
 350                         if (ret == -1) {
 351                                 DEBUG(0,("Error doing fstat on open file %s "
 352                                          "(%s)\n", path,strerror(errno) ));
 353                         }
 354                 }
 355
 356                 /* For a non-io open, this stat failing means file not found. JRA */
 357                 if (ret == -1) {
 358                         status = map_nt_error_from_unix(errno);
 359                         fd_close(fsp);
 360                         return status;
 361                 }
 362         }
 363
 364         /*
 365          * POSIX allows read-only opens of directories. We don't
 366          * want to do this (we use a different code path for this)
 367          * so catch a directory open and return an EISDIR. JRA.
 368          */
 369
 370         if(S_ISDIR(psbuf->st_mode)) {
 371                 fd_close(fsp);
 372                 errno = EISDIR;
 373                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 374         }
 375
 376         fsp->mode = psbuf->st_mode;
 377         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
 378         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 379         fsp->file_pid = req ? req->smbpid : 0;
 380         fsp->can_lock = True;
 381         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 382         if (!CAN_WRITE(conn)) {
 383                 fsp->can_write = False;
 384         } else {
 385                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 386                         True : False;
 387         }
 388         fsp->print_file = False;
 389         fsp->modified = False;
 390         fsp->sent_oplock_break = NO_BREAK_SENT;
 391         fsp->is_directory = False;
 392         if (conn->aio_write_behind_list &&
 393             is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
 394                 fsp->aio_write_behind = True;
 395         }
 396
 397         string_set(&fsp->fsp_name, path);
 398         fsp->wcp = NULL; /* Write cache pointer. */
 399
 400         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 401                  conn->server_info->unix_name,
 402                  fsp->fsp_name,
 403                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 404                  conn->num_files_open + 1));
 405
 406         errno = 0;
 407         return NT_STATUS_OK;
 408 }
 409
 410 /*******************************************************************
 411  Return True if the filename is one of the special executable types.
 412 ********************************************************************/
 413
 414 static bool is_executable(const char *fname)
 415 {
 416         if ((fname = strrchr_m(fname,'.'))) {
 417                 if (strequal(fname,".com") ||
 418                     strequal(fname,".dll") ||
 419                     strequal(fname,".exe") ||
 420                     strequal(fname,".sym")) {
 421                         return True;
 422                 }
 423         }
 424         return False;
 425 }
 426
 427 /****************************************************************************
 428  Check if we can open a file with a share mode.
 429  Returns True if conflict, False if not.
 430 ****************************************************************************/
 431
 432 static bool share_conflict(struct share_mode_entry *entry,
 433                            uint32 access_mask,
 434                            uint32 share_access)
 435 {
 436         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 437                   "entry->share_access = 0x%x, "
 438                   "entry->private_options = 0x%x\n",
 439                   (unsigned int)entry->access_mask,
 440                   (unsigned int)entry->share_access,
 441                   (unsigned int)entry->private_options));
 442
 443         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 444                   (unsigned int)access_mask, (unsigned int)share_access));
 445
 446         if ((entry->access_mask & (FILE_WRITE_DATA|
 447                                    FILE_APPEND_DATA|
 448                                    FILE_READ_DATA|
 449                                    FILE_EXECUTE|
 450                                    DELETE_ACCESS)) == 0) {
 451                 DEBUG(10,("share_conflict: No conflict due to "
 452                           "entry->access_mask = 0x%x\n",
 453                           (unsigned int)entry->access_mask ));
 454                 return False;
 455         }
 456
 457         if ((access_mask & (FILE_WRITE_DATA|
 458                             FILE_APPEND_DATA|
 459                             FILE_READ_DATA|
 460                             FILE_EXECUTE|
 461                             DELETE_ACCESS)) == 0) {
 462                 DEBUG(10,("share_conflict: No conflict due to "
 463                           "access_mask = 0x%x\n",
 464                           (unsigned int)access_mask ));
 465                 return False;
 466         }
 467
 468 #if 1 /* JRA TEST - Superdebug. */
 469 #define CHECK_MASK(num, am, right, sa, share) \
 470         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 471                 (unsigned int)(num), (unsigned int)(am), \
 472                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 473         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 474                 (unsigned int)(num), (unsigned int)(sa), \
 475                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 476         if (((am) & (right)) && !((sa) & (share))) { \
 477                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 478 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 479                         (unsigned int)(share) )); \
 480                 return True; \
 481         }
 482 #else
 483 #define CHECK_MASK(num, am, right, sa, share) \
 484         if (((am) & (right)) && !((sa) & (share))) { \
 485                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 486 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 487                         (unsigned int)(share) )); \
 488                 return True; \
 489         }
 490 #endif
 491
 492         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 493                    share_access, FILE_SHARE_WRITE);
 494         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 495                    entry->share_access, FILE_SHARE_WRITE);
 496
 497         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 498                    share_access, FILE_SHARE_READ);
 499         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 500                    entry->share_access, FILE_SHARE_READ);
 501
 502         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 503                    share_access, FILE_SHARE_DELETE);
 504         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 505                    entry->share_access, FILE_SHARE_DELETE);
 506
 507         DEBUG(10,("share_conflict: No conflict.\n"));
 508         return False;
 509 }
 510
 511 #if defined(DEVELOPER)
 512 static void validate_my_share_entries(int num,
 513                                       struct share_mode_entry *share_entry)
 514 {
 515         files_struct *fsp;
 516
 517         if (!procid_is_me(&share_entry->pid)) {
 518                 return;
 519         }
 520
 521         if (is_deferred_open_entry(share_entry) &&
 522             !open_was_deferred(share_entry->op_mid)) {
 523                 char *str = talloc_asprintf(talloc_tos(),
 524                         "Got a deferred entry without a request: "
 525                         "PANIC: %s\n",
 526                         share_mode_str(talloc_tos(), num, share_entry));
 527                 smb_panic(str);
 528         }
 529
 530         if (!is_valid_share_mode_entry(share_entry)) {
 531                 return;
 532         }
 533
 534         fsp = file_find_dif(share_entry->id,
 535                             share_entry->share_file_id);
 536         if (!fsp) {
 537                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 538                          share_mode_str(talloc_tos(), num, share_entry) ));
 539                 smb_panic("validate_my_share_entries: Cannot match a "
 540                           "share entry with an open file\n");
 541         }
 542
 543         if (is_deferred_open_entry(share_entry) ||
 544             is_unused_share_mode_entry(share_entry)) {
 545                 goto panic;
 546         }
 547
 548         if ((share_entry->op_type == NO_OPLOCK) &&
 549             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 550                 /* Someone has already written to it, but I haven't yet
 551                  * noticed */
 552                 return;
 553         }
 554
 555         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 556                 goto panic;
 557         }
 558
 559         return;
 560
 561  panic:
 562         {
 563                 char *str;
 564                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 565                          share_mode_str(talloc_tos(), num, share_entry) ));
 566                 str = talloc_asprintf(talloc_tos(),
 567                         "validate_my_share_entries: "
 568                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 569                          fsp->fsp_name, (unsigned int)fsp->oplock_type,
 570                          (unsigned int)share_entry->op_type );
 571                 smb_panic(str);
 572         }
 573 }
 574 #endif
 575
 576 static bool is_stat_open(uint32 access_mask)
 577 {
 578         return (access_mask &&
 579                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 580                                   FILE_WRITE_ATTRIBUTES))==0) &&
 581                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 582                                  FILE_WRITE_ATTRIBUTES)) != 0));
 583 }
 584
 585 /****************************************************************************
 586  Deal with share modes
 587  Invarient: Share mode must be locked on entry and exit.
 588  Returns -1 on error, or number of share modes on success (may be zero).
 589 ****************************************************************************/
 590
 591 static NTSTATUS open_mode_check(connection_struct *conn,
 592                                 const char *fname,
 593                                 struct share_mode_lock *lck,
 594                                 uint32 access_mask,
 595                                 uint32 share_access,
 596                                 uint32 create_options,
 597                                 bool *file_existed)
 598 {
 599         int i;
 600
 601         if(lck->num_share_modes == 0) {
 602                 return NT_STATUS_OK;
 603         }
 604
 605         *file_existed = True;
 606
 607         /* A delete on close prohibits everything */
 608
 609         if (lck->delete_on_close) {
 610                 return NT_STATUS_DELETE_PENDING;
 611         }
 612
 613         if (is_stat_open(access_mask)) {
 614                 /* Stat open that doesn't trigger oplock breaks or share mode
 615                  * checks... ! JRA. */
 616                 return NT_STATUS_OK;
 617         }
 618
 619         /*
 620          * Check if the share modes will give us access.
 621          */
 622
 623 #if defined(DEVELOPER)
 624         for(i = 0; i < lck->num_share_modes; i++) {
 625                 validate_my_share_entries(i, &lck->share_modes[i]);
 626         }
 627 #endif
 628
 629         if (!lp_share_modes(SNUM(conn))) {
 630                 return NT_STATUS_OK;
 631         }
 632
 633         /* Now we check the share modes, after any oplock breaks. */
 634         for(i = 0; i < lck->num_share_modes; i++) {
 635
 636                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 637                         continue;
 638                 }
 639
 640                 /* someone else has a share lock on it, check to see if we can
 641                  * too */
 642                 if (share_conflict(&lck->share_modes[i],
 643                                    access_mask, share_access)) {
 644                         return NT_STATUS_SHARING_VIOLATION;
 645                 }
 646         }
 647
 648         return NT_STATUS_OK;
 649 }
 650
 651 static bool is_delete_request(files_struct *fsp) {
 652         return ((fsp->access_mask == DELETE_ACCESS) &&
 653                 (fsp->oplock_type == NO_OPLOCK));
 654 }
 655
 656 /*
 657  * 1) No files open at all or internal open: Grant whatever the client wants.
 658  *
 659  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 660  *    request, break if the oplock around is a batch oplock. If it's another
 661  *    requested access type, break.
 662  *
 663  * 3) Only level2 around: Grant level2 and do nothing else.
 664  */
 665
 666 static bool delay_for_oplocks(struct share_mode_lock *lck,
 667                               files_struct *fsp,
 668                               uint16 mid,
 669                               int pass_number,
 670                               int oplock_request)
 671 {
 672         int i;
 673         struct share_mode_entry *exclusive = NULL;
 674         bool valid_entry = False;
 675         bool delay_it = False;
 676         bool have_level2 = False;
 677         NTSTATUS status;
 678         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 679
 680         if (oplock_request & INTERNAL_OPEN_ONLY) {
 681                 fsp->oplock_type = NO_OPLOCK;
 682         }
 683
 684         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 685                 return False;
 686         }
 687
 688         for (i=0; i<lck->num_share_modes; i++) {
 689
 690                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 691                         continue;
 692                 }
 693
 694                 /* At least one entry is not an invalid or deferred entry. */
 695                 valid_entry = True;
 696
 697                 if (pass_number == 1) {
 698                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 699                                 SMB_ASSERT(exclusive == NULL);
 700                                 exclusive = &lck->share_modes[i];
 701                         }
 702                 } else {
 703                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 704                                 SMB_ASSERT(exclusive == NULL);
 705                                 exclusive = &lck->share_modes[i];
 706                         }
 707                 }
 708
 709                 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
 710                         SMB_ASSERT(exclusive == NULL);
 711                         have_level2 = True;
 712                 }
 713         }
 714
 715         if (!valid_entry) {
 716                 /* All entries are placeholders or deferred.
 717                  * Directly grant whatever the client wants. */
 718                 if (fsp->oplock_type == NO_OPLOCK) {
 719                         /* Store a level2 oplock, but don't tell the client */
 720                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 721                 }
 722                 return False;
 723         }
 724
 725         if (exclusive != NULL) { /* Found an exclusive oplock */
 726                 SMB_ASSERT(!have_level2);
 727                 delay_it = is_delete_request(fsp) ?
 728                         BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
 729         }
 730
 731         if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
 732                 /* We can at most grant level2 as there are other
 733                  * level2 or NO_OPLOCK entries. */
 734                 fsp->oplock_type = LEVEL_II_OPLOCK;
 735         }
 736
 737         if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
 738                 /* Store a level2 oplock, but don't tell the client */
 739                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
 740         }
 741
 742         if (!delay_it) {
 743                 return False;
 744         }
 745
 746         /*
 747          * Send a break message to the oplock holder and delay the open for
 748          * our client.
 749          */
 750
 751         DEBUG(10, ("Sending break request to PID %s\n",
 752                    procid_str_static(&exclusive->pid)));
 753         exclusive->op_mid = mid;
 754
 755         /* Create the message. */
 756         share_mode_entry_to_message(msg, exclusive);
 757
 758         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 759            don't want this set in the share mode struct pointed to by lck. */
 760
 761         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 762                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 763         }
 764
 765         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 766                                     MSG_SMB_BREAK_REQUEST,
 767                                     (uint8 *)msg,
 768                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 769         if (!NT_STATUS_IS_OK(status)) {
 770                 DEBUG(3, ("Could not send oplock break message: %s\n",
 771                           nt_errstr(status)));
 772         }
 773
 774         return True;
 775 }
 776
 777 static bool request_timed_out(struct timeval request_time,
 778                               struct timeval timeout)
 779 {
 780         struct timeval now, end_time;
 781         GetTimeOfDay(&now);
 782         end_time = timeval_sum(&request_time, &timeout);
 783         return (timeval_compare(&end_time, &now) < 0);
 784 }
 785
 786 /****************************************************************************
 787  Handle the 1 second delay in returning a SHARING_VIOLATION error.
 788 ****************************************************************************/
 789
 790 static void defer_open(struct share_mode_lock *lck,
 791                        struct timeval request_time,
 792                        struct timeval timeout,
 793                        struct smb_request *req,
 794                        struct deferred_open_record *state)
 795 {
 796         int i;
 797
 798         /* Paranoia check */
 799
 800         for (i=0; i<lck->num_share_modes; i++) {
 801                 struct share_mode_entry *e = &lck->share_modes[i];
 802
 803                 if (!is_deferred_open_entry(e)) {
 804                         continue;
 805                 }
 806
 807                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
 808                         DEBUG(0, ("Trying to defer an already deferred "
 809                                   "request: mid=%d, exiting\n", req->mid));
 810                         exit_server("attempt to defer a deferred request");
 811                 }
 812         }
 813
 814         /* End paranoia check */
 815
 816         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
 817                   "open entry for mid %u\n",
 818                   (unsigned int)request_time.tv_sec,
 819                   (unsigned int)request_time.tv_usec,
 820                   (unsigned int)req->mid));
 821
 822         if (!push_deferred_smb_message(req, request_time, timeout,
 823                                        (char *)state, sizeof(*state))) {
 824                 exit_server("push_deferred_smb_message failed");
 825         }
 826         add_deferred_open(lck, req->mid, request_time, state->id);
 827
 828         /*
 829          * Push the MID of this packet on the signing queue.
 830          * We only do this once, the first time we push the packet
 831          * onto the deferred open queue, as this has a side effect
 832          * of incrementing the response sequence number.
 833          */
 834
 835         srv_defer_sign_response(req->mid);
 836 }
 837
 838
 839 /****************************************************************************
 840  On overwrite open ensure that the attributes match.
 841 ****************************************************************************/
 842
 843 static bool open_match_attributes(connection_struct *conn,
 844                                   const char *path,
 845                                   uint32 old_dos_attr,
 846                                   uint32 new_dos_attr,
 847                                   mode_t existing_unx_mode,
 848                                   mode_t new_unx_mode,
 849                                   mode_t *returned_unx_mode)
 850 {
 851         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
 852
 853         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 854         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
 855
 856         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
 857            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
 858                 *returned_unx_mode = new_unx_mode;
 859         } else {
 860                 *returned_unx_mode = (mode_t)0;
 861         }
 862
 863         DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
 864                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
 865                   "returned_unx_mode = 0%o\n",
 866                   path,
 867                   (unsigned int)old_dos_attr,
 868                   (unsigned int)existing_unx_mode,
 869                   (unsigned int)new_dos_attr,
 870                   (unsigned int)*returned_unx_mode ));
 871
 872         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
 873         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 874                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
 875                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
 876                         return False;
 877                 }
 878         }
 879         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
 880                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
 881                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
 882                         return False;
 883                 }
 884         }
 885         return True;
 886 }
 887
 888 /****************************************************************************
 889  Special FCB or DOS processing in the case of a sharing violation.
 890  Try and find a duplicated file handle.
 891 ****************************************************************************/
 892
 893 static files_struct *fcb_or_dos_open(struct smb_request *req,
 894                                      connection_struct *conn,
 895                                      const char *fname,
 896                                      struct file_id id,
 897                                      uint16 file_pid,
 898                                      uint16 vuid,
 899                                      uint32 access_mask,
 900                                      uint32 share_access,
 901                                      uint32 create_options)
 902 {
 903         files_struct *fsp;
 904         files_struct *dup_fsp;
 905
 906         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
 907                  "file %s.\n", fname ));
 908
 909         for(fsp = file_find_di_first(id); fsp;
 910             fsp = file_find_di_next(fsp)) {
 911
 912                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
 913                           "vuid = %u, file_pid = %u, private_options = 0x%x "
 914                           "access_mask = 0x%x\n", fsp->fsp_name,
 915                           fsp->fh->fd, (unsigned int)fsp->vuid,
 916                           (unsigned int)fsp->file_pid,
 917                           (unsigned int)fsp->fh->private_options,
 918                           (unsigned int)fsp->access_mask ));
 919
 920                 if (fsp->fh->fd != -1 &&
 921                     fsp->vuid == vuid &&
 922                     fsp->file_pid == file_pid &&
 923                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
 924                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
 925                     (fsp->access_mask & FILE_WRITE_DATA) &&
 926                     strequal(fsp->fsp_name, fname)) {
 927                         DEBUG(10,("fcb_or_dos_open: file match\n"));
 928                         break;
 929                 }
 930         }
 931
 932         if (!fsp) {
 933                 return NULL;
 934         }
 935
 936         /* quite an insane set of semantics ... */
 937         if (is_executable(fname) &&
 938             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
 939                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
 940                 return NULL;
 941         }
 942
 943         /* We need to duplicate this fsp. */
 944         if (!NT_STATUS_IS_OK(dup_file_fsp(req, fsp, access_mask, share_access,
 945                                           create_options, &dup_fsp))) {
 946                 return NULL;
 947         }
 948
 949         return dup_fsp;
 950 }
 951
 952 /****************************************************************************
 953  Open a file with a share mode - old openX method - map into NTCreate.
 954 ****************************************************************************/
 955
 956 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
 957                                  uint32 *paccess_mask,
 958                                  uint32 *pshare_mode,
 959                                  uint32 *pcreate_disposition,
 960                                  uint32 *pcreate_options)
 961 {
 962         uint32 access_mask;
 963         uint32 share_mode;
 964         uint32 create_disposition;
 965         uint32 create_options = 0;
 966
 967         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
 968                   "open_func = 0x%x\n",
 969                   fname, (unsigned int)deny_mode, (unsigned int)open_func ));
 970
 971         /* Create the NT compatible access_mask. */
 972         switch (GET_OPENX_MODE(deny_mode)) {
 973                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
 974                 case DOS_OPEN_RDONLY:
 975                         access_mask = FILE_GENERIC_READ;
 976                         break;
 977                 case DOS_OPEN_WRONLY:
 978                         access_mask = FILE_GENERIC_WRITE;
 979                         break;
 980                 case DOS_OPEN_RDWR:
 981                 case DOS_OPEN_FCB:
 982                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
 983                         break;
 984                 default:
 985                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
 986                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
 987                         return False;
 988         }
 989
 990         /* Create the NT compatible create_disposition. */
 991         switch (open_func) {
 992                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
 993                         create_disposition = FILE_CREATE;
 994                         break;
 995
 996                 case OPENX_FILE_EXISTS_OPEN:
 997                         create_disposition = FILE_OPEN;
 998                         break;
 999
1000                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1001                         create_disposition = FILE_OPEN_IF;
1002                         break;
1003
1004                 case OPENX_FILE_EXISTS_TRUNCATE:
1005                         create_disposition = FILE_OVERWRITE;
1006                         break;
1007
1008                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1009                         create_disposition = FILE_OVERWRITE_IF;
1010                         break;
1011
1012                 default:
1013                         /* From samba4 - to be confirmed. */
1014                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1015                                 create_disposition = FILE_CREATE;
1016                                 break;
1017                         }
1018                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1019                                   "open_func 0x%x\n", (unsigned int)open_func));
1020                         return False;
1021         }
1022
1023         /* Create the NT compatible share modes. */
1024         switch (GET_DENY_MODE(deny_mode)) {
1025                 case DENY_ALL:
1026                         share_mode = FILE_SHARE_NONE;
1027                         break;
1028
1029                 case DENY_WRITE:
1030                         share_mode = FILE_SHARE_READ;
1031                         break;
1032
1033                 case DENY_READ:
1034                         share_mode = FILE_SHARE_WRITE;
1035                         break;
1036
1037                 case DENY_NONE:
1038                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039                         break;
1040
1041                 case DENY_DOS:
1042                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1043                         if (is_executable(fname)) {
1044                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1045                         } else {
1046                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1047                                         share_mode = FILE_SHARE_READ;
1048                                 } else {
1049                                         share_mode = FILE_SHARE_NONE;
1050                                 }
1051                         }
1052                         break;
1053
1054                 case DENY_FCB:
1055                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1056                         share_mode = FILE_SHARE_NONE;
1057                         break;
1058
1059                 default:
1060                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1061                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1062                         return False;
1063         }
1064
1065         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1066                   "share_mode = 0x%x, create_disposition = 0x%x, "
1067                   "create_options = 0x%x\n",
1068                   fname,
1069                   (unsigned int)access_mask,
1070                   (unsigned int)share_mode,
1071                   (unsigned int)create_disposition,
1072                   (unsigned int)create_options ));
1073
1074         if (paccess_mask) {
1075                 *paccess_mask = access_mask;
1076         }
1077         if (pshare_mode) {
1078                 *pshare_mode = share_mode;
1079         }
1080         if (pcreate_disposition) {
1081                 *pcreate_disposition = create_disposition;
1082         }
1083         if (pcreate_options) {
1084                 *pcreate_options = create_options;
1085         }
1086
1087         return True;
1088
1089 }
1090
1091 static void schedule_defer_open(struct share_mode_lock *lck,
1092                                 struct timeval request_time,
1093                                 struct smb_request *req)
1094 {
1095         struct deferred_open_record state;
1096
1097         /* This is a relative time, added to the absolute
1098            request_time value to get the absolute timeout time.
1099            Note that if this is the second or greater time we enter
1100            this codepath for this particular request mid then
1101            request_time is left as the absolute time of the *first*
1102            time this request mid was processed. This is what allows
1103            the request to eventually time out. */
1104
1105         struct timeval timeout;
1106
1107         /* Normally the smbd we asked should respond within
1108          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1109          * the client did, give twice the timeout as a safety
1110          * measure here in case the other smbd is stuck
1111          * somewhere else. */
1112
1113         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1114
1115         /* Nothing actually uses state.delayed_for_oplocks
1116            but it's handy to differentiate in debug messages
1117            between a 30 second delay due to oplock break, and
1118            a 1 second delay for share mode conflicts. */
1119
1120         state.delayed_for_oplocks = True;
1121         state.id = lck->id;
1122
1123         if (!request_timed_out(request_time, timeout)) {
1124                 defer_open(lck, request_time, timeout, req, &state);
1125         }
1126 }
1127
1128 /****************************************************************************
1129  Open a file with a share mode.
1130 ****************************************************************************/
1131
1132 NTSTATUS open_file_ntcreate(connection_struct *conn,
1133                             struct smb_request *req,
1134                             const char *fname,
1135                             SMB_STRUCT_STAT *psbuf,
1136                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1137                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1138                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1139                             uint32 create_options,      /* options such as delete on close. */
1140                             uint32 new_dos_attributes,  /* attributes used for new file. */
1141                             int oplock_request,         /* internal Samba oplock codes. */
1142                                                         /* Information (FILE_EXISTS etc.) */
1143                             int *pinfo,
1144                             files_struct **result)
1145 {
1146         int flags=0;
1147         int flags2=0;
1148         bool file_existed = VALID_STAT(*psbuf);
1149         bool def_acl = False;
1150         bool posix_open = False;
1151         bool new_file_created = False;
1152         struct file_id id;
1153         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1154         files_struct *fsp = NULL;
1155         mode_t new_unx_mode = (mode_t)0;
1156         mode_t unx_mode = (mode_t)0;
1157         int info;
1158         uint32 existing_dos_attributes = 0;
1159         struct pending_message_list *pml = NULL;
1160         struct timeval request_time = timeval_zero();
1161         struct share_mode_lock *lck = NULL;
1162         uint32 open_access_mask = access_mask;
1163         NTSTATUS status;
1164         int ret_flock;
1165         char *parent_dir;
1166         const char *newname;
1167
1168         ZERO_STRUCT(id);
1169
1170         if (conn->printer) {
1171                 /*
1172                  * Printers are handled completely differently.
1173                  * Most of the passed parameters are ignored.
1174                  */
1175
1176                 if (pinfo) {
1177                         *pinfo = FILE_WAS_CREATED;
1178                 }
1179
1180                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1181
1182                 return print_fsp_open(req, conn, fname, req->vuid, result);
1183         }
1184
1185         if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1186                                    &newname)) {
1187                 return NT_STATUS_NO_MEMORY;
1188         }
1189
1190         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1191                 posix_open = True;
1192                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1193                 new_dos_attributes = 0;
1194         } else {
1195                 /* We add aARCH to this as this mode is only used if the file is
1196                  * created new. */
1197                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1198                                      parent_dir);
1199         }
1200
1201         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1202                    "access_mask=0x%x share_access=0x%x "
1203                    "create_disposition = 0x%x create_options=0x%x "
1204                    "unix mode=0%o oplock_request=%d\n",
1205                    fname, new_dos_attributes, access_mask, share_access,
1206                    create_disposition, create_options, unx_mode,
1207                    oplock_request));
1208
1209         if ((access_mask & FILE_READ_DATA)||(access_mask & FILE_WRITE_DATA)) {
1210                 DEBUG(10, ("open_file_ntcreate: adding FILE_READ_ATTRIBUTES "
1211                         "to requested access_mask 0x%x, new mask 0x%x",
1212                         access_mask,
1213                         access_mask | FILE_READ_ATTRIBUTES ));
1214
1215                 access_mask |= FILE_READ_ATTRIBUTES;
1216         }
1217
1218         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1219                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1220                 return NT_STATUS_INTERNAL_ERROR;
1221         }
1222
1223         /*
1224          * Only non-internal opens can be deferred at all
1225          */
1226
1227         if ((req != NULL)
1228             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1229                 struct deferred_open_record *state =
1230                         (struct deferred_open_record *)pml->private_data.data;
1231
1232                 /* Remember the absolute time of the original
1233                    request with this mid. We'll use it later to
1234                    see if this has timed out. */
1235
1236                 request_time = pml->request_time;
1237
1238                 /* Remove the deferred open entry under lock. */
1239                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1240                                           NULL);
1241                 if (lck == NULL) {
1242                         DEBUG(0, ("could not get share mode lock\n"));
1243                 } else {
1244                         del_deferred_open_entry(lck, req->mid);
1245                         TALLOC_FREE(lck);
1246                 }
1247
1248                 /* Ensure we don't reprocess this message. */
1249                 remove_deferred_open_smb_message(req->mid);
1250         }
1251
1252         status = check_name(conn, fname);
1253         if (!NT_STATUS_IS_OK(status)) {
1254                 return status;
1255         }
1256
1257         if (!posix_open) {
1258                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1259                 if (file_existed) {
1260                         existing_dos_attributes = dos_mode(conn, fname, psbuf);
1261                 }
1262         }
1263
1264         /* ignore any oplock requests if oplocks are disabled */
1265         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1266             IS_VETO_OPLOCK_PATH(conn, fname)) {
1267                 /* Mask off everything except the private Samba bits. */
1268                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1269         }
1270
1271         /* this is for OS/2 long file names - say we don't support them */
1272         if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1273                 /* OS/2 Workplace shell fix may be main code stream in a later
1274                  * release. */
1275                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1276                          "supported.\n"));
1277                 if (use_nt_status()) {
1278                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1279                 }
1280                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1281         }
1282
1283         switch( create_disposition ) {
1284                 /*
1285                  * Currently we're using FILE_SUPERSEDE as the same as
1286                  * FILE_OVERWRITE_IF but they really are
1287                  * different. FILE_SUPERSEDE deletes an existing file
1288                  * (requiring delete access) then recreates it.
1289                  */
1290                 case FILE_SUPERSEDE:
1291                         /* If file exists replace/overwrite. If file doesn't
1292                          * exist create. */
1293                         flags2 |= (O_CREAT | O_TRUNC);
1294                         break;
1295
1296                 case FILE_OVERWRITE_IF:
1297                         /* If file exists replace/overwrite. If file doesn't
1298                          * exist create. */
1299                         flags2 |= (O_CREAT | O_TRUNC);
1300                         break;
1301
1302                 case FILE_OPEN:
1303                         /* If file exists open. If file doesn't exist error. */
1304                         if (!file_existed) {
1305                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1306                                          "requested for file %s and file "
1307                                          "doesn't exist.\n", fname ));
1308                                 errno = ENOENT;
1309                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1310                         }
1311                         break;
1312
1313                 case FILE_OVERWRITE:
1314                         /* If file exists overwrite. If file doesn't exist
1315                          * error. */
1316                         if (!file_existed) {
1317                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1318                                          "requested for file %s and file "
1319                                          "doesn't exist.\n", fname ));
1320                                 errno = ENOENT;
1321                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1322                         }
1323                         flags2 |= O_TRUNC;
1324                         break;
1325
1326                 case FILE_CREATE:
1327                         /* If file exists error. If file doesn't exist
1328                          * create. */
1329                         if (file_existed) {
1330                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1331                                          "requested for file %s and file "
1332                                          "already exists.\n", fname ));
1333                                 if (S_ISDIR(psbuf->st_mode)) {
1334                                         errno = EISDIR;
1335                                 } else {
1336                                         errno = EEXIST;
1337                                 }
1338                                 return map_nt_error_from_unix(errno);
1339                         }
1340                         flags2 |= (O_CREAT|O_EXCL);
1341                         break;
1342
1343                 case FILE_OPEN_IF:
1344                         /* If file exists open. If file doesn't exist
1345                          * create. */
1346                         flags2 |= O_CREAT;
1347                         break;
1348
1349                 default:
1350                         return NT_STATUS_INVALID_PARAMETER;
1351         }
1352
1353         /* We only care about matching attributes on file exists and
1354          * overwrite. */
1355
1356         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1357                              (create_disposition == FILE_OVERWRITE_IF))) {
1358                 if (!open_match_attributes(conn, fname,
1359                                            existing_dos_attributes,
1360                                            new_dos_attributes, psbuf->st_mode,
1361                                            unx_mode, &new_unx_mode)) {
1362                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1363                                  "for file %s (%x %x) (0%o, 0%o)\n",
1364                                  fname, existing_dos_attributes,
1365                                  new_dos_attributes,
1366                                  (unsigned int)psbuf->st_mode,
1367                                  (unsigned int)unx_mode ));
1368                         errno = EACCES;
1369                         return NT_STATUS_ACCESS_DENIED;
1370                 }
1371         }
1372
1373         /* This is a nasty hack - must fix... JRA. */
1374         if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1375                 open_access_mask = access_mask = FILE_GENERIC_ALL;
1376         }
1377
1378         /*
1379          * Convert GENERIC bits to specific bits.
1380          */
1381
1382         se_map_generic(&access_mask, &file_generic_mapping);
1383         open_access_mask = access_mask;
1384
1385         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1386                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1387         }
1388
1389         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1390                    "access_mask=0x%x\n", fname, access_mask ));
1391
1392         /*
1393          * Note that we ignore the append flag as append does not
1394          * mean the same thing under DOS and Unix.
1395          */
1396
1397         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1398                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1399                 /* DENY_DOS opens are always underlying read-write on the
1400                    file handle, no matter what the requested access mask
1401                     says. */
1402                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1403                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1404                         flags = O_RDWR;
1405                 } else {
1406                         flags = O_WRONLY;
1407                 }
1408         } else {
1409                 flags = O_RDONLY;
1410         }
1411
1412         /*
1413          * Currently we only look at FILE_WRITE_THROUGH for create options.
1414          */
1415
1416 #if defined(O_SYNC)
1417         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1418                 flags2 |= O_SYNC;
1419         }
1420 #endif /* O_SYNC */
1421
1422         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1423                 flags2 |= O_APPEND;
1424         }
1425
1426         if (!posix_open && !CAN_WRITE(conn)) {
1427                 /*
1428                  * We should really return a permission denied error if either
1429                  * O_CREAT or O_TRUNC are set, but for compatibility with
1430                  * older versions of Samba we just AND them out.
1431                  */
1432                 flags2 &= ~(O_CREAT|O_TRUNC);
1433         }
1434
1435         /*
1436          * Ensure we can't write on a read-only share or file.
1437          */
1438
1439         if (flags != O_RDONLY && file_existed &&
1440             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1441                 DEBUG(5,("open_file_ntcreate: write access requested for "
1442                          "file %s on read only %s\n",
1443                          fname, !CAN_WRITE(conn) ? "share" : "file" ));
1444                 errno = EACCES;
1445                 return NT_STATUS_ACCESS_DENIED;
1446         }
1447
1448         status = file_new(req, conn, &fsp);
1449         if(!NT_STATUS_IS_OK(status)) {
1450                 return status;
1451         }
1452
1453         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1454         fsp->share_access = share_access;
1455         fsp->fh->private_options = create_options;
1456         fsp->access_mask = open_access_mask; /* We change this to the
1457                                               * requested access_mask after
1458                                               * the open is done. */
1459         fsp->posix_open = posix_open;
1460
1461         /* Ensure no SAMBA_PRIVATE bits can be set. */
1462         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1463
1464         if (timeval_is_zero(&request_time)) {
1465                 request_time = fsp->open_time;
1466         }
1467
1468         if (file_existed) {
1469                 struct timespec old_write_time = get_mtimespec(psbuf);
1470                 id = vfs_file_id_from_sbuf(conn, psbuf);
1471
1472                 lck = get_share_mode_lock(talloc_tos(), id,
1473                                           conn->connectpath,
1474                                           fname, &old_write_time);
1475
1476                 if (lck == NULL) {
1477                         file_free(req, fsp);
1478                         DEBUG(0, ("Could not get share mode lock\n"));
1479                         return NT_STATUS_SHARING_VIOLATION;
1480                 }
1481
1482                 /* First pass - send break only on batch oplocks. */
1483                 if ((req != NULL)
1484                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1485                                          oplock_request)) {
1486                         schedule_defer_open(lck, request_time, req);
1487                         TALLOC_FREE(lck);
1488                         file_free(req, fsp);
1489                         return NT_STATUS_SHARING_VIOLATION;
1490                 }
1491
1492                 /* Use the client requested access mask here, not the one we
1493                  * open with. */
1494                 status = open_mode_check(conn, fname, lck,
1495                                          access_mask, share_access,
1496                                          create_options, &file_existed);
1497
1498                 if (NT_STATUS_IS_OK(status)) {
1499                         /* We might be going to allow this open. Check oplock
1500                          * status again. */
1501                         /* Second pass - send break for both batch or
1502                          * exclusive oplocks. */
1503                         if ((req != NULL)
1504                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1505                                                   oplock_request)) {
1506                                 schedule_defer_open(lck, request_time, req);
1507                                 TALLOC_FREE(lck);
1508                                 file_free(req, fsp);
1509                                 return NT_STATUS_SHARING_VIOLATION;
1510                         }
1511                 }
1512
1513                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1514                         /* DELETE_PENDING is not deferred for a second */
1515                         TALLOC_FREE(lck);
1516                         file_free(req, fsp);
1517                         return status;
1518                 }
1519
1520                 if (!NT_STATUS_IS_OK(status)) {
1521                         uint32 can_access_mask;
1522                         bool can_access = True;
1523
1524                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1525
1526                         /* Check if this can be done with the deny_dos and fcb
1527                          * calls. */
1528                         if (create_options &
1529                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1530                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1531                                 files_struct *fsp_dup;
1532
1533                                 if (req == NULL) {
1534                                         DEBUG(0, ("DOS open without an SMB "
1535                                                   "request!\n"));
1536                                         TALLOC_FREE(lck);
1537                                         file_free(req, fsp);
1538                                         return NT_STATUS_INTERNAL_ERROR;
1539                                 }
1540
1541                                 /* Use the client requested access mask here,
1542                                  * not the one we open with. */
1543                                 fsp_dup = fcb_or_dos_open(req, conn, fname, id,
1544                                                           req->smbpid,
1545                                                           req->vuid,
1546                                                           access_mask,
1547                                                           share_access,
1548                                                           create_options);
1549
1550                                 if (fsp_dup) {
1551                                         TALLOC_FREE(lck);
1552                                         file_free(req, fsp);
1553                                         if (pinfo) {
1554                                                 *pinfo = FILE_WAS_OPENED;
1555                                         }
1556                                         conn->num_files_open++;
1557                                         *result = fsp_dup;
1558                                         return NT_STATUS_OK;
1559                                 }
1560                         }
1561
1562                         /*
1563                          * This next line is a subtlety we need for
1564                          * MS-Access. If a file open will fail due to share
1565                          * permissions and also for security (access) reasons,
1566                          * we need to return the access failed error, not the
1567                          * share error. We can't open the file due to kernel
1568                          * oplock deadlock (it's possible we failed above on
1569                          * the open_mode_check()) so use a userspace check.
1570                          */
1571
1572                         if (flags & O_RDWR) {
1573                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1574                         } else if (flags & O_WRONLY) {
1575                                 can_access_mask = FILE_WRITE_DATA;
1576                         } else {
1577                                 can_access_mask = FILE_READ_DATA;
1578                         }
1579
1580                         if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1581                             !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1582                                 can_access = False;
1583                         }
1584
1585                         /*
1586                          * If we're returning a share violation, ensure we
1587                          * cope with the braindead 1 second delay.
1588                          */
1589
1590                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1591                             lp_defer_sharing_violations()) {
1592                                 struct timeval timeout;
1593                                 struct deferred_open_record state;
1594                                 int timeout_usecs;
1595
1596                                 /* this is a hack to speed up torture tests
1597                                    in 'make test' */
1598                                 timeout_usecs = lp_parm_int(SNUM(conn),
1599                                                             "smbd","sharedelay",
1600                                                             SHARING_VIOLATION_USEC_WAIT);
1601
1602                                 /* This is a relative time, added to the absolute
1603                                    request_time value to get the absolute timeout time.
1604                                    Note that if this is the second or greater time we enter
1605                                    this codepath for this particular request mid then
1606                                    request_time is left as the absolute time of the *first*
1607                                    time this request mid was processed. This is what allows
1608                                    the request to eventually time out. */
1609
1610                                 timeout = timeval_set(0, timeout_usecs);
1611
1612                                 /* Nothing actually uses state.delayed_for_oplocks
1613                                    but it's handy to differentiate in debug messages
1614                                    between a 30 second delay due to oplock break, and
1615                                    a 1 second delay for share mode conflicts. */
1616
1617                                 state.delayed_for_oplocks = False;
1618                                 state.id = id;
1619
1620                                 if ((req != NULL)
1621                                     && !request_timed_out(request_time,
1622                                                           timeout)) {
1623                                         defer_open(lck, request_time, timeout,
1624                                                    req, &state);
1625                                 }
1626                         }
1627
1628                         TALLOC_FREE(lck);
1629                         if (can_access) {
1630                                 /*
1631                                  * We have detected a sharing violation here
1632                                  * so return the correct error code
1633                                  */
1634                                 status = NT_STATUS_SHARING_VIOLATION;
1635                         } else {
1636                                 status = NT_STATUS_ACCESS_DENIED;
1637                         }
1638                         file_free(req, fsp);
1639                         return status;
1640                 }
1641
1642                 /*
1643                  * We exit this block with the share entry *locked*.....
1644                  */
1645         }
1646
1647         SMB_ASSERT(!file_existed || (lck != NULL));
1648
1649         /*
1650          * Ensure we pay attention to default ACLs on directories if required.
1651          */
1652
1653         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1654             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1655                 unx_mode = 0777;
1656         }
1657
1658         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1659                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1660                  (unsigned int)flags, (unsigned int)flags2,
1661                  (unsigned int)unx_mode, (unsigned int)access_mask,
1662                  (unsigned int)open_access_mask));
1663
1664         /*
1665          * open_file strips any O_TRUNC flags itself.
1666          */
1667
1668         fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1669                              flags|flags2, unx_mode, access_mask,
1670                              open_access_mask);
1671
1672         if (!NT_STATUS_IS_OK(fsp_open)) {
1673                 if (lck != NULL) {
1674                         TALLOC_FREE(lck);
1675                 }
1676                 file_free(req, fsp);
1677                 return fsp_open;
1678         }
1679
1680         if (!file_existed) {
1681                 struct timespec old_write_time = get_mtimespec(psbuf);
1682                 /*
1683                  * Deal with the race condition where two smbd's detect the
1684                  * file doesn't exist and do the create at the same time. One
1685                  * of them will win and set a share mode, the other (ie. this
1686                  * one) should check if the requested share mode for this
1687                  * create is allowed.
1688                  */
1689
1690                 /*
1691                  * Now the file exists and fsp is successfully opened,
1692                  * fsp->dev and fsp->inode are valid and should replace the
1693                  * dev=0,inode=0 from a non existent file. Spotted by
1694                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1695                  */
1696
1697                 id = fsp->file_id;
1698
1699                 lck = get_share_mode_lock(talloc_tos(), id,
1700                                           conn->connectpath,
1701                                           fname, &old_write_time);
1702
1703                 if (lck == NULL) {
1704                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1705                                   "mode lock for %s\n", fname));
1706                         fd_close(fsp);
1707                         file_free(req, fsp);
1708                         return NT_STATUS_SHARING_VIOLATION;
1709                 }
1710
1711                 /* First pass - send break only on batch oplocks. */
1712                 if ((req != NULL)
1713                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1714                                          oplock_request)) {
1715                         schedule_defer_open(lck, request_time, req);
1716                         TALLOC_FREE(lck);
1717                         fd_close(fsp);
1718                         file_free(req, fsp);
1719                         return NT_STATUS_SHARING_VIOLATION;
1720                 }
1721
1722                 status = open_mode_check(conn, fname, lck,
1723                                          access_mask, share_access,
1724                                          create_options, &file_existed);
1725
1726                 if (NT_STATUS_IS_OK(status)) {
1727                         /* We might be going to allow this open. Check oplock
1728                          * status again. */
1729                         /* Second pass - send break for both batch or
1730                          * exclusive oplocks. */
1731                         if ((req != NULL)
1732                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1733                                                  oplock_request)) {
1734                                 schedule_defer_open(lck, request_time, req);
1735                                 TALLOC_FREE(lck);
1736                                 fd_close(fsp);
1737                                 file_free(req, fsp);
1738                                 return NT_STATUS_SHARING_VIOLATION;
1739                         }
1740                 }
1741
1742                 if (!NT_STATUS_IS_OK(status)) {
1743                         struct deferred_open_record state;
1744
1745                         fd_close(fsp);
1746                         file_free(req, fsp);
1747
1748                         state.delayed_for_oplocks = False;
1749                         state.id = id;
1750
1751                         /* Do it all over again immediately. In the second
1752                          * round we will find that the file existed and handle
1753                          * the DELETE_PENDING and FCB cases correctly. No need
1754                          * to duplicate the code here. Essentially this is a
1755                          * "goto top of this function", but don't tell
1756                          * anybody... */
1757
1758                         if (req != NULL) {
1759                                 defer_open(lck, request_time, timeval_zero(),
1760                                            req, &state);
1761                         }
1762                         TALLOC_FREE(lck);
1763                         return status;
1764                 }
1765
1766                 /*
1767                  * We exit this block with the share entry *locked*.....
1768                  */
1769
1770         }
1771
1772         SMB_ASSERT(lck != NULL);
1773
1774         /* note that we ignore failure for the following. It is
1775            basically a hack for NFS, and NFS will never set one of
1776            these only read them. Nobody but Samba can ever set a deny
1777            mode and we have already checked our more authoritative
1778            locking database for permission to set this deny mode. If
1779            the kernel refuses the operations then the kernel is wrong.
1780            note that GPFS supports it as well - jmcd */
1781
1782         if (fsp->fh->fd != -1) {
1783                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1784                 if(ret_flock == -1 ){
1785
1786                         TALLOC_FREE(lck);
1787                         fd_close(fsp);
1788                         file_free(req, fsp);
1789
1790                         return NT_STATUS_SHARING_VIOLATION;
1791                 }
1792         }
1793
1794         /*
1795          * At this point onwards, we can guarentee that the share entry
1796          * is locked, whether we created the file or not, and that the
1797          * deny mode is compatible with all current opens.
1798          */
1799
1800         /*
1801          * If requested, truncate the file.
1802          */
1803
1804         if (flags2&O_TRUNC) {
1805                 /*
1806                  * We are modifing the file after open - update the stat
1807                  * struct..
1808                  */
1809                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1810                     (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1811                         status = map_nt_error_from_unix(errno);
1812                         TALLOC_FREE(lck);
1813                         fd_close(fsp);
1814                         file_free(req, fsp);
1815                         return status;
1816                 }
1817         }
1818
1819         /* Record the options we were opened with. */
1820         fsp->share_access = share_access;
1821         fsp->fh->private_options = create_options;
1822         fsp->access_mask = access_mask;
1823
1824         if (file_existed) {
1825                 /* stat opens on existing files don't get oplocks. */
1826                 if (is_stat_open(open_access_mask)) {
1827                         fsp->oplock_type = NO_OPLOCK;
1828                 }
1829
1830                 if (!(flags2 & O_TRUNC)) {
1831                         info = FILE_WAS_OPENED;
1832                 } else {
1833                         info = FILE_WAS_OVERWRITTEN;
1834                 }
1835         } else {
1836                 info = FILE_WAS_CREATED;
1837         }
1838
1839         if (pinfo) {
1840                 *pinfo = info;
1841         }
1842
1843         /*
1844          * Setup the oplock info in both the shared memory and
1845          * file structs.
1846          */
1847
1848         if ((fsp->oplock_type != NO_OPLOCK) &&
1849             (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1850                 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1851                         /* Could not get the kernel oplock */
1852                         fsp->oplock_type = NO_OPLOCK;
1853                 }
1854         }
1855
1856         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1857                 new_file_created = True;
1858         }
1859
1860         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1861                        fsp->oplock_type, new_file_created);
1862
1863         /* Handle strange delete on close create semantics. */
1864         if ((create_options & FILE_DELETE_ON_CLOSE)
1865             && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1866                         && is_ntfs_stream_name(fname))
1867                 || can_set_initial_delete_on_close(lck))) {
1868                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1869
1870                 if (!NT_STATUS_IS_OK(status)) {
1871                         /* Remember to delete the mode we just added. */
1872                         del_share_mode(lck, fsp);
1873                         TALLOC_FREE(lck);
1874                         fd_close(fsp);
1875                         file_free(req, fsp);
1876                         return status;
1877                 }
1878                 /* Note that here we set the *inital* delete on close flag,
1879                    not the regular one. The magic gets handled in close. */
1880                 fsp->initial_delete_on_close = True;
1881         }
1882
1883         if (new_file_created) {
1884                 /* Files should be initially set as archive */
1885                 if (lp_map_archive(SNUM(conn)) ||
1886                     lp_store_dos_attributes(SNUM(conn))) {
1887                         if (!posix_open) {
1888                                 SMB_STRUCT_STAT tmp_sbuf;
1889                                 SET_STAT_INVALID(tmp_sbuf);
1890                                 if (file_set_dosmode(
1891                                             conn, fname,
1892                                             new_dos_attributes | aARCH,
1893                                             &tmp_sbuf, parent_dir,
1894                                             true) == 0) {
1895                                         unx_mode = tmp_sbuf.st_mode;
1896                                 }
1897                         }
1898                 }
1899         }
1900
1901         /*
1902          * Take care of inherited ACLs on created files - if default ACL not
1903          * selected.
1904          */
1905
1906         if (!posix_open && !file_existed && !def_acl) {
1907
1908                 int saved_errno = errno; /* We might get ENOSYS in the next
1909                                           * call.. */
1910
1911                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1912                     errno == ENOSYS) {
1913                         errno = saved_errno; /* Ignore ENOSYS */
1914                 }
1915
1916         } else if (new_unx_mode) {
1917
1918                 int ret = -1;
1919
1920                 /* Attributes need changing. File already existed. */
1921
1922                 {
1923                         int saved_errno = errno; /* We might get ENOSYS in the
1924                                                   * next call.. */
1925                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1926
1927                         if (ret == -1 && errno == ENOSYS) {
1928                                 errno = saved_errno; /* Ignore ENOSYS */
1929                         } else {
1930                                 DEBUG(5, ("open_file_ntcreate: reset "
1931                                           "attributes of file %s to 0%o\n",
1932                                           fname, (unsigned int)new_unx_mode));
1933                                 ret = 0; /* Don't do the fchmod below. */
1934                         }
1935                 }
1936
1937                 if ((ret == -1) &&
1938                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1939                         DEBUG(5, ("open_file_ntcreate: failed to reset "
1940                                   "attributes of file %s to 0%o\n",
1941                                   fname, (unsigned int)new_unx_mode));
1942         }
1943
1944         /* If this is a successful open, we must remove any deferred open
1945          * records. */
1946         if (req != NULL) {
1947                 del_deferred_open_entry(lck, req->mid);
1948         }
1949         TALLOC_FREE(lck);
1950
1951         conn->num_files_open++;
1952
1953         *result = fsp;
1954         return NT_STATUS_OK;
1955 }
1956
1957 /****************************************************************************
1958  Open a file for for write to ensure that we can fchmod it.
1959 ****************************************************************************/
1960
1961 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
1962                           const char *fname,
1963                           SMB_STRUCT_STAT *psbuf, files_struct **result)
1964 {
1965         files_struct *fsp = NULL;
1966         NTSTATUS status;
1967
1968         if (!VALID_STAT(*psbuf)) {
1969                 return NT_STATUS_INVALID_PARAMETER;
1970         }
1971
1972         status = file_new(req, conn, &fsp);
1973         if(!NT_STATUS_IS_OK(status)) {
1974                 return status;
1975         }
1976
1977         /* note! we must use a non-zero desired access or we don't get
1978            a real file descriptor. Oh what a twisted web we weave. */
1979         status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1980                            0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1981
1982         /*
1983          * This is not a user visible file open.
1984          * Don't set a share mode and don't increment
1985          * the conn->num_files_open.
1986          */
1987
1988         if (!NT_STATUS_IS_OK(status)) {
1989                 file_free(req, fsp);
1990                 return status;
1991         }
1992
1993         *result = fsp;
1994         return NT_STATUS_OK;
1995 }
1996
1997 /****************************************************************************
1998  Close the fchmod file fd - ensure no locks are lost.
1999 ****************************************************************************/
2000
2001 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2002 {
2003         NTSTATUS status = fd_close(fsp);
2004         file_free(req, fsp);
2005         return status;
2006 }
2007
2008 static NTSTATUS mkdir_internal(connection_struct *conn,
2009                                 const char *name,
2010                                 uint32 file_attributes,
2011                                 SMB_STRUCT_STAT *psbuf)
2012 {
2013         mode_t mode;
2014         char *parent_dir;
2015         const char *dirname;
2016         NTSTATUS status;
2017         bool posix_open = false;
2018
2019         if(!CAN_WRITE(conn)) {
2020                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2021                          "%s\n", lp_servicename(SNUM(conn))));
2022                 return NT_STATUS_ACCESS_DENIED;
2023         }
2024
2025         status = check_name(conn, name);
2026         if (!NT_STATUS_IS_OK(status)) {
2027                 return status;
2028         }
2029
2030         if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2031                                    &dirname)) {
2032                 return NT_STATUS_NO_MEMORY;
2033         }
2034
2035         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2036                 posix_open = true;
2037                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2038         } else {
2039                 mode = unix_mode(conn, aDIR, name, parent_dir);
2040         }
2041
2042         if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2043                 return map_nt_error_from_unix(errno);
2044         }
2045
2046         /* Ensure we're checking for a symlink here.... */
2047         /* We don't want to get caught by a symlink racer. */
2048
2049         if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2050                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2051                           name, strerror(errno)));
2052                 return map_nt_error_from_unix(errno);
2053         }
2054
2055         if (!S_ISDIR(psbuf->st_mode)) {
2056                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2057                           name));
2058                 return NT_STATUS_ACCESS_DENIED;
2059         }
2060
2061         if (lp_store_dos_attributes(SNUM(conn))) {
2062                 if (!posix_open) {
2063                         file_set_dosmode(conn, name,
2064                                  file_attributes | aDIR, NULL,
2065                                  parent_dir,
2066                                  true);
2067                 }
2068         }
2069
2070         if (lp_inherit_perms(SNUM(conn))) {
2071                 inherit_access_posix_acl(conn, parent_dir, name, mode);
2072         }
2073
2074         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2075                 /*
2076                  * Check if high bits should have been set,
2077                  * then (if bits are missing): add them.
2078                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2079                  * dir.
2080                  */
2081                 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2082                         SMB_VFS_CHMOD(conn, name,
2083                                       psbuf->st_mode | (mode & ~psbuf->st_mode));
2084                 }
2085         }
2086
2087         /* Change the owner if required. */
2088         if (lp_inherit_owner(SNUM(conn))) {
2089                 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2090         }
2091
2092         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2093                      name);
2094
2095         return NT_STATUS_OK;
2096 }
2097
2098 /****************************************************************************
2099  Open a directory from an NT SMB call.
2100 ****************************************************************************/
2101
2102 NTSTATUS open_directory(connection_struct *conn,
2103                         struct smb_request *req,
2104                         const char *fname,
2105                         SMB_STRUCT_STAT *psbuf,
2106                         uint32 access_mask,
2107                         uint32 share_access,
2108                         uint32 create_disposition,
2109                         uint32 create_options,
2110                         uint32 file_attributes,
2111                         int *pinfo,
2112                         files_struct **result)
2113 {
2114         files_struct *fsp = NULL;
2115         bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2116         struct share_mode_lock *lck = NULL;
2117         NTSTATUS status;
2118         struct timespec mtimespec;
2119         int info = 0;
2120
2121         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2122                  "share_access = 0x%x create_options = 0x%x, "
2123                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2124                  fname,
2125                  (unsigned int)access_mask,
2126                  (unsigned int)share_access,
2127                  (unsigned int)create_options,
2128                  (unsigned int)create_disposition,
2129                  (unsigned int)file_attributes));
2130
2131         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2132                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2133                         is_ntfs_stream_name(fname)) {
2134                 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2135                 return NT_STATUS_NOT_A_DIRECTORY;
2136         }
2137
2138         switch( create_disposition ) {
2139                 case FILE_OPEN:
2140
2141                         info = FILE_WAS_OPENED;
2142
2143                         /*
2144                          * We want to follow symlinks here.
2145                          */
2146
2147                         if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2148                                 return map_nt_error_from_unix(errno);
2149                         }
2150
2151                         break;
2152
2153                 case FILE_CREATE:
2154
2155                         /* If directory exists error. If directory doesn't
2156                          * exist create. */
2157
2158                         status = mkdir_internal(conn,
2159                                                 fname,
2160                                                 file_attributes,
2161                                                 psbuf);
2162
2163                         if (!NT_STATUS_IS_OK(status)) {
2164                                 DEBUG(2, ("open_directory: unable to create "
2165                                           "%s. Error was %s\n", fname,
2166                                           nt_errstr(status)));
2167                                 return status;
2168                         }
2169
2170                         info = FILE_WAS_CREATED;
2171                         break;
2172
2173                 case FILE_OPEN_IF:
2174                         /*
2175                          * If directory exists open. If directory doesn't
2176                          * exist create.
2177                          */
2178
2179                         status = mkdir_internal(conn,
2180                                                 fname,
2181                                                 file_attributes,
2182                                                 psbuf);
2183
2184                         if (NT_STATUS_IS_OK(status)) {
2185                                 info = FILE_WAS_CREATED;
2186                         }
2187
2188                         if (NT_STATUS_EQUAL(status,
2189                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2190                                 info = FILE_WAS_OPENED;
2191                                 status = NT_STATUS_OK;
2192                         }
2193
2194                         break;
2195
2196                 case FILE_SUPERSEDE:
2197                 case FILE_OVERWRITE:
2198                 case FILE_OVERWRITE_IF:
2199                 default:
2200                         DEBUG(5,("open_directory: invalid create_disposition "
2201                                  "0x%x for directory %s\n",
2202                                  (unsigned int)create_disposition, fname));
2203                         return NT_STATUS_INVALID_PARAMETER;
2204         }
2205
2206         if(!S_ISDIR(psbuf->st_mode)) {
2207                 DEBUG(5,("open_directory: %s is not a directory !\n",
2208                          fname ));
2209                 return NT_STATUS_NOT_A_DIRECTORY;
2210         }
2211
2212         status = file_new(req, conn, &fsp);
2213         if(!NT_STATUS_IS_OK(status)) {
2214                 return status;
2215         }
2216
2217         /*
2218          * Setup the files_struct for it.
2219          */
2220
2221         fsp->mode = psbuf->st_mode;
2222         fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2223         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2224         fsp->file_pid = req ? req->smbpid : 0;
2225         fsp->can_lock = False;
2226         fsp->can_read = False;
2227         fsp->can_write = False;
2228
2229         fsp->share_access = share_access;
2230         fsp->fh->private_options = create_options;
2231         fsp->access_mask = access_mask;
2232
2233         fsp->print_file = False;
2234         fsp->modified = False;
2235         fsp->oplock_type = NO_OPLOCK;
2236         fsp->sent_oplock_break = NO_BREAK_SENT;
2237         fsp->is_directory = True;
2238         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2239
2240         string_set(&fsp->fsp_name,fname);
2241
2242         mtimespec = get_mtimespec(psbuf);
2243
2244         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2245                                   conn->connectpath,
2246                                   fname, &mtimespec);
2247
2248         if (lck == NULL) {
2249                 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2250                 file_free(req, fsp);
2251                 return NT_STATUS_SHARING_VIOLATION;
2252         }
2253
2254         status = open_mode_check(conn, fname, lck,
2255                                 access_mask, share_access,
2256                                 create_options, &dir_existed);
2257
2258         if (!NT_STATUS_IS_OK(status)) {
2259                 TALLOC_FREE(lck);
2260                 file_free(req, fsp);
2261                 return status;
2262         }
2263
2264         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2265                        True);
2266
2267         /* For directories the delete on close bit at open time seems
2268            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2269         if (create_options & FILE_DELETE_ON_CLOSE) {
2270                 status = can_set_delete_on_close(fsp, True, 0);
2271                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2272                         TALLOC_FREE(lck);
2273                         file_free(req, fsp);
2274                         return status;
2275                 }
2276
2277                 if (NT_STATUS_IS_OK(status)) {
2278                         /* Note that here we set the *inital* delete on close flag,
2279                            not the regular one. The magic gets handled in close. */
2280                         fsp->initial_delete_on_close = True;
2281                 }
2282         }
2283
2284         TALLOC_FREE(lck);
2285
2286         if (pinfo) {
2287                 *pinfo = info;
2288         }
2289
2290         conn->num_files_open++;
2291
2292         *result = fsp;
2293         return NT_STATUS_OK;
2294 }
2295
2296 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2297 {
2298         NTSTATUS status;
2299         SMB_STRUCT_STAT sbuf;
2300         files_struct *fsp;
2301
2302         SET_STAT_INVALID(sbuf);
2303
2304         status = open_directory(conn, req, directory, &sbuf,
2305                                 FILE_READ_ATTRIBUTES, /* Just a stat open */
2306                                 FILE_SHARE_NONE, /* Ignored for stat opens */
2307                                 FILE_CREATE,
2308                                 0,
2309                                 FILE_ATTRIBUTE_DIRECTORY,
2310                                 NULL,
2311                                 &fsp);
2312
2313         if (NT_STATUS_IS_OK(status)) {
2314                 close_file(req, fsp, NORMAL_CLOSE);
2315         }
2316
2317         return status;
2318 }
2319
2320 /****************************************************************************
2321  Receive notification that one of our open files has been renamed by another
2322  smbd process.
2323 ****************************************************************************/
2324
2325 void msg_file_was_renamed(struct messaging_context *msg,
2326                           void *private_data,
2327                           uint32_t msg_type,
2328                           struct server_id server_id,
2329                           DATA_BLOB *data)
2330 {
2331         files_struct *fsp;
2332         char *frm = (char *)data->data;
2333         struct file_id id;
2334         const char *sharepath;
2335         const char *newname;
2336         size_t sp_len;
2337
2338         if (data->data == NULL
2339             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2340                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2341                           (int)data->length));
2342                 return;
2343         }
2344
2345         /* Unpack the message. */
2346         pull_file_id_16(frm, &id);
2347         sharepath = &frm[16];
2348         newname = sharepath + strlen(sharepath) + 1;
2349         sp_len = strlen(sharepath);
2350
2351         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2352                 "file_id %s\n",
2353                   sharepath, newname, file_id_string_tos(&id)));
2354
2355         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2356                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2357                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2358                                 fsp->fnum, fsp->fsp_name, newname ));
2359                         string_set(&fsp->fsp_name, newname);
2360                 } else {
2361                         /* TODO. JRA. */
2362                         /* Now we have the complete path we can work out if this is
2363                            actually within this share and adjust newname accordingly. */
2364                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2365                                 "not sharepath %s) "
2366                                 "fnum %d from %s -> %s\n",
2367                                 fsp->conn->connectpath,
2368                                 sharepath,
2369                                 fsp->fnum,
2370                                 fsp->fsp_name,
2371                                 newname ));
2372                 }
2373         }
2374 }
2375
2376 struct case_semantics_state {
2377         connection_struct *conn;
2378         bool case_sensitive;
2379         bool case_preserve;
2380         bool short_case_preserve;
2381 };
2382
2383 /****************************************************************************
2384  Restore case semantics.
2385 ****************************************************************************/
2386 static int restore_case_semantics(struct case_semantics_state *state)
2387 {
2388         state->conn->case_sensitive = state->case_sensitive;
2389         state->conn->case_preserve = state->case_preserve;
2390         state->conn->short_case_preserve = state->short_case_preserve;
2391         return 0;
2392 }
2393
2394 /****************************************************************************
2395  Save case semantics.
2396 ****************************************************************************/
2397 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2398                                                              connection_struct *conn)
2399 {
2400         struct case_semantics_state *result;
2401
2402         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2403                 DEBUG(0, ("talloc failed\n"));
2404                 return NULL;
2405         }
2406
2407         result->conn = conn;
2408         result->case_sensitive = conn->case_sensitive;
2409         result->case_preserve = conn->case_preserve;
2410         result->short_case_preserve = conn->short_case_preserve;
2411
2412         /* Set to POSIX. */
2413         conn->case_sensitive = True;
2414         conn->case_preserve = True;
2415         conn->short_case_preserve = True;
2416
2417         talloc_set_destructor(result, restore_case_semantics);
2418
2419         return result;
2420 }
2421
2422 /*
2423  * If a main file is opened for delete, all streams need to be checked for
2424  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2425  * If that works, delete them all by setting the delete on close and close.
2426  */
2427
2428 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2429                                         const char *fname)
2430 {
2431         struct stream_struct *stream_info;
2432         files_struct **streams;
2433         int i;
2434         unsigned int num_streams;
2435         TALLOC_CTX *frame = talloc_stackframe();
2436         NTSTATUS status;
2437
2438         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2439                                     &num_streams, &stream_info);
2440
2441         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2442             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2443                 DEBUG(10, ("no streams around\n"));
2444                 TALLOC_FREE(frame);
2445                 return NT_STATUS_OK;
2446         }
2447
2448         if (!NT_STATUS_IS_OK(status)) {
2449                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2450                            nt_errstr(status)));
2451                 goto fail;
2452         }
2453
2454         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2455                    num_streams));
2456
2457         if (num_streams == 0) {
2458                 TALLOC_FREE(frame);
2459                 return NT_STATUS_OK;
2460         }
2461
2462         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2463         if (streams == NULL) {
2464                 DEBUG(0, ("talloc failed\n"));
2465                 status = NT_STATUS_NO_MEMORY;
2466                 goto fail;
2467         }
2468
2469         for (i=0; i<num_streams; i++) {
2470                 char *streamname;
2471
2472                 if (strequal(stream_info[i].name, "::$DATA")) {
2473                         streams[i] = NULL;
2474                         continue;
2475                 }
2476
2477                 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2478                                              stream_info[i].name);
2479
2480                 if (streamname == NULL) {
2481                         DEBUG(0, ("talloc_aprintf failed\n"));
2482                         status = NT_STATUS_NO_MEMORY;
2483                         goto fail;
2484                 }
2485
2486                 status = create_file_unixpath
2487                         (conn,                  /* conn */
2488                          NULL,                  /* req */
2489                          streamname,            /* fname */
2490                          DELETE_ACCESS,         /* access_mask */
2491                          FILE_SHARE_READ | FILE_SHARE_WRITE
2492                          | FILE_SHARE_DELETE,   /* share_access */
2493                          FILE_OPEN,             /* create_disposition*/
2494                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2495                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2496                          0,                     /* oplock_request */
2497                          0,                     /* allocation_size */
2498                          NULL,                  /* sd */
2499                          NULL,                  /* ea_list */
2500                          &streams[i],           /* result */
2501                          NULL,                  /* pinfo */
2502                          NULL);                 /* psbuf */
2503
2504                 TALLOC_FREE(streamname);
2505
2506                 if (!NT_STATUS_IS_OK(status)) {
2507                         DEBUG(10, ("Could not open stream %s: %s\n",
2508                                    streamname, nt_errstr(status)));
2509                         break;
2510                 }
2511         }
2512
2513         /*
2514          * don't touch the variable "status" beyond this point :-)
2515          */
2516
2517         for (i -= 1 ; i >= 0; i--) {
2518                 if (streams[i] == NULL) {
2519                         continue;
2520                 }
2521
2522                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2523                            streams[i]->fsp_name));
2524                 close_file(NULL, streams[i], NORMAL_CLOSE);
2525         }
2526
2527  fail:
2528         TALLOC_FREE(frame);
2529         return status;
2530 }
2531
2532 /*
2533  * Wrapper around open_file_ntcreate and open_directory
2534  */
2535
2536 NTSTATUS create_file_unixpath(connection_struct *conn,
2537                               struct smb_request *req,
2538                               const char *fname,
2539                               uint32_t access_mask,
2540                               uint32_t share_access,
2541                               uint32_t create_disposition,
2542                               uint32_t create_options,
2543                               uint32_t file_attributes,
2544                               uint32_t oplock_request,
2545                               uint64_t allocation_size,
2546                               struct security_descriptor *sd,
2547                               struct ea_list *ea_list,
2548
2549                               files_struct **result,
2550                               int *pinfo,
2551                               SMB_STRUCT_STAT *psbuf)
2552 {
2553         SMB_STRUCT_STAT sbuf;
2554         int info = FILE_WAS_OPENED;
2555         files_struct *base_fsp = NULL;
2556         files_struct *fsp = NULL;
2557         NTSTATUS status;
2558
2559         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2560                   "file_attributes = 0x%x, share_access = 0x%x, "
2561                   "create_disposition = 0x%x create_options = 0x%x "
2562                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2563                   "fname = %s\n",
2564                   (unsigned int)access_mask,
2565                   (unsigned int)file_attributes,
2566                   (unsigned int)share_access,
2567                   (unsigned int)create_disposition,
2568                   (unsigned int)create_options,
2569                   (unsigned int)oplock_request,
2570                   ea_list, sd, fname));
2571
2572         if (create_options & FILE_OPEN_BY_FILE_ID) {
2573                 status = NT_STATUS_NOT_SUPPORTED;
2574                 goto fail;
2575         }
2576
2577         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2578                 status = NT_STATUS_INVALID_PARAMETER;
2579                 goto fail;
2580         }
2581
2582         if (req == NULL) {
2583                 oplock_request |= INTERNAL_OPEN_ONLY;
2584         }
2585
2586         if (psbuf != NULL) {
2587                 sbuf = *psbuf;
2588         }
2589         else {
2590                 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2591                         SET_STAT_INVALID(sbuf);
2592                 }
2593         }
2594
2595         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2596             && (access_mask & DELETE_ACCESS)
2597             && !is_ntfs_stream_name(fname)) {
2598                 /*
2599                  * We can't open a file with DELETE access if any of the
2600                  * streams is open without FILE_SHARE_DELETE
2601                  */
2602                 status = open_streams_for_delete(conn, fname);
2603
2604                 if (!NT_STATUS_IS_OK(status)) {
2605                         goto fail;
2606                 }
2607         }
2608
2609         /* This is the correct thing to do (check every time) but can_delete
2610          * is expensive (it may have to read the parent directory
2611          * permissions). So for now we're not doing it unless we have a strong
2612          * hint the client is really going to delete this file. If the client
2613          * is forcing FILE_CREATE let the filesystem take care of the
2614          * permissions. */
2615
2616         /* Setting FILE_SHARE_DELETE is the hint. */
2617
2618         if (lp_acl_check_permissions(SNUM(conn))
2619             && (create_disposition != FILE_CREATE)
2620             && (share_access & FILE_SHARE_DELETE)
2621             && (access_mask & DELETE_ACCESS)
2622             && (!can_delete_file_in_directory(conn, fname))) {
2623                 status = NT_STATUS_ACCESS_DENIED;
2624                 goto fail;
2625         }
2626
2627 #if 0
2628         /* We need to support SeSecurityPrivilege for this. */
2629         if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2630             !user_has_privileges(current_user.nt_user_token,
2631                                  &se_security)) {
2632                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2633                 goto fail;
2634         }
2635 #endif
2636
2637         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2638             && is_ntfs_stream_name(fname)
2639             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2640                 char *base;
2641                 uint32 base_create_disposition;
2642
2643                 if (create_options & FILE_DIRECTORY_FILE) {
2644                         status = NT_STATUS_NOT_A_DIRECTORY;
2645                         goto fail;
2646                 }
2647
2648                 status = split_ntfs_stream_name(talloc_tos(), fname,
2649                                                 &base, NULL);
2650                 if (!NT_STATUS_IS_OK(status)) {
2651                         DEBUG(10, ("create_file_unixpath: "
2652                                 "split_ntfs_stream_name failed: %s\n",
2653                                 nt_errstr(status)));
2654                         goto fail;
2655                 }
2656
2657                 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2658
2659                 switch (create_disposition) {
2660                 case FILE_OPEN:
2661                         base_create_disposition = FILE_OPEN;
2662                         break;
2663                 default:
2664                         base_create_disposition = FILE_OPEN_IF;
2665                         break;
2666                 }
2667
2668                 status = create_file_unixpath(conn, NULL, base, 0,
2669                                               FILE_SHARE_READ
2670                                               | FILE_SHARE_WRITE
2671                                               | FILE_SHARE_DELETE,
2672                                               base_create_disposition,
2673                                               0, 0, 0, 0, NULL, NULL,
2674                                               &base_fsp, NULL, NULL);
2675                 if (!NT_STATUS_IS_OK(status)) {
2676                         DEBUG(10, ("create_file_unixpath for base %s failed: "
2677                                    "%s\n", base, nt_errstr(status)));
2678                         goto fail;
2679                 }
2680         }
2681
2682         /*
2683          * If it's a request for a directory open, deal with it separately.
2684          */
2685
2686         if (create_options & FILE_DIRECTORY_FILE) {
2687
2688                 if (create_options & FILE_NON_DIRECTORY_FILE) {
2689                         status = NT_STATUS_INVALID_PARAMETER;
2690                         goto fail;
2691                 }
2692
2693                 /* Can't open a temp directory. IFS kit test. */
2694                 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2695                         status = NT_STATUS_INVALID_PARAMETER;
2696                         goto fail;
2697                 }
2698
2699                 /*
2700                  * We will get a create directory here if the Win32
2701                  * app specified a security descriptor in the
2702                  * CreateDirectory() call.
2703                  */
2704
2705                 oplock_request = 0;
2706                 status = open_directory(
2707                         conn, req, fname, &sbuf, access_mask, share_access,
2708                         create_disposition, create_options, file_attributes,
2709                         &info, &fsp);
2710         } else {
2711
2712                 /*
2713                  * Ordinary file case.
2714                  */
2715
2716                 status = open_file_ntcreate(
2717                         conn, req, fname, &sbuf, access_mask, share_access,
2718                         create_disposition, create_options, file_attributes,
2719                         oplock_request, &info, &fsp);
2720
2721                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2722
2723                         /*
2724                          * Fail the open if it was explicitly a non-directory
2725                          * file.
2726                          */
2727
2728                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2729                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2730                                 goto fail;
2731                         }
2732
2733                         oplock_request = 0;
2734                         status = open_directory(
2735                                 conn, req, fname, &sbuf, access_mask,
2736                                 share_access, create_disposition,
2737                                 create_options, file_attributes,
2738                                 &info, &fsp);
2739                 }
2740         }
2741
2742         if (!NT_STATUS_IS_OK(status)) {
2743                 goto fail;
2744         }
2745
2746         /*
2747          * According to the MS documentation, the only time the security
2748          * descriptor is applied to the opened file is iff we *created* the
2749          * file; an existing file stays the same.
2750          *
2751          * Also, it seems (from observation) that you can open the file with
2752          * any access mask but you can still write the sd. We need to override
2753          * the granted access before we call set_sd
2754          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2755          */
2756
2757         if ((sd != NULL) && (info == FILE_WAS_CREATED)
2758             && lp_nt_acl_support(SNUM(conn))) {
2759
2760                 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2761                 uint32_t saved_access_mask = fsp->access_mask;
2762
2763                 if (sd->owner_sid == NULL) {
2764                         sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2765                 }
2766                 if (sd->group_sid == NULL) {
2767                         sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2768                 }
2769                 if (sd->sacl == NULL) {
2770                         sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2771                 }
2772                 if (sd->dacl == NULL) {
2773                         sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2774                 }
2775
2776                 fsp->access_mask = FILE_GENERIC_ALL;
2777
2778                 /* Convert all the generic bits. */
2779                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2780                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2781
2782                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2783
2784                 fsp->access_mask = saved_access_mask;
2785
2786                 if (!NT_STATUS_IS_OK(status)) {
2787                         goto fail;
2788                 }
2789         }
2790
2791         if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2792                 status = set_ea(conn, fsp, fname, ea_list);
2793                 if (!NT_STATUS_IS_OK(status)) {
2794                         goto fail;
2795                 }
2796         }
2797
2798         if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2799                 status = NT_STATUS_ACCESS_DENIED;
2800                 goto fail;
2801         }
2802
2803         /* Save the requested allocation size. */
2804         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2805                 if (allocation_size
2806                     && (allocation_size > sbuf.st_size)) {
2807                         fsp->initial_allocation_size = smb_roundup(
2808                                 fsp->conn, allocation_size);
2809                         if (fsp->is_directory) {
2810                                 /* Can't set allocation size on a directory. */
2811                                 status = NT_STATUS_ACCESS_DENIED;
2812                                 goto fail;
2813                         }
2814                         if (vfs_allocate_file_space(
2815                                     fsp, fsp->initial_allocation_size) == -1) {
2816                                 status = NT_STATUS_DISK_FULL;
2817                                 goto fail;
2818                         }
2819                 } else {
2820                         fsp->initial_allocation_size = smb_roundup(
2821                                 fsp->conn, (uint64_t)sbuf.st_size);
2822                 }
2823         }
2824
2825         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2826
2827         /*
2828          * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2829          * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2830          * also close fsp->base_fsp which we have to also do explicitly in
2831          * this routine here, as not in all "goto fail:" we have the fsp set
2832          * up already to be initialized with the base_fsp.
2833          */
2834
2835         fsp->base_fsp = base_fsp;
2836
2837         *result = fsp;
2838         if (pinfo != NULL) {
2839                 *pinfo = info;
2840         }
2841         if (psbuf != NULL) {
2842                 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2843                         *psbuf = sbuf;
2844                 }
2845                 else {
2846                         SMB_VFS_FSTAT(fsp, psbuf);
2847                 }
2848         }
2849         return NT_STATUS_OK;
2850
2851  fail:
2852         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2853
2854         if (fsp != NULL) {
2855                 close_file(req, fsp, ERROR_CLOSE);
2856                 fsp = NULL;
2857         }
2858         if (base_fsp != NULL) {
2859                 close_file(req, base_fsp, ERROR_CLOSE);
2860                 base_fsp = NULL;
2861         }
2862         return status;
2863 }
2864
2865 NTSTATUS create_file(connection_struct *conn,
2866                      struct smb_request *req,
2867                      uint16_t root_dir_fid,
2868                      const char *fname,
2869                      uint32_t access_mask,
2870                      uint32_t share_access,
2871                      uint32_t create_disposition,
2872                      uint32_t create_options,
2873                      uint32_t file_attributes,
2874                      uint32_t oplock_request,
2875                      uint64_t allocation_size,
2876                      struct security_descriptor *sd,
2877                      struct ea_list *ea_list,
2878
2879                      files_struct **result,
2880                      int *pinfo,
2881                      SMB_STRUCT_STAT *psbuf)
2882 {
2883         struct case_semantics_state *case_state = NULL;
2884         SMB_STRUCT_STAT sbuf;
2885         int info = FILE_WAS_OPENED;
2886         files_struct *fsp = NULL;
2887         NTSTATUS status;
2888
2889         DEBUG(10,("create_file: access_mask = 0x%x "
2890                   "file_attributes = 0x%x, share_access = 0x%x, "
2891                   "create_disposition = 0x%x create_options = 0x%x "
2892                   "oplock_request = 0x%x "
2893                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2894                   "fname = %s\n",
2895                   (unsigned int)access_mask,
2896                   (unsigned int)file_attributes,
2897                   (unsigned int)share_access,
2898                   (unsigned int)create_disposition,
2899                   (unsigned int)create_options,
2900                   (unsigned int)oplock_request,
2901                   (unsigned int)root_dir_fid,
2902                   ea_list, sd, fname));
2903
2904         /*
2905          * Get the file name.
2906          */
2907
2908         if (root_dir_fid != 0) {
2909                 /*
2910                  * This filename is relative to a directory fid.
2911                  */
2912                 char *parent_fname = NULL;
2913                 files_struct *dir_fsp = file_fsp(req, root_dir_fid);
2914
2915                 if (dir_fsp == NULL) {
2916                         status = NT_STATUS_INVALID_HANDLE;
2917                         goto fail;
2918                 }
2919
2920                 if (!dir_fsp->is_directory) {
2921
2922                         /*
2923                          * Check to see if this is a mac fork of some kind.
2924                          */
2925
2926                         if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2927                                         is_ntfs_stream_name(fname)) {
2928                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2929                                 goto fail;
2930                         }
2931
2932                         /*
2933                           we need to handle the case when we get a
2934                           relative open relative to a file and the
2935                           pathname is blank - this is a reopen!
2936                           (hint from demyn plantenberg)
2937                         */
2938
2939                         status = NT_STATUS_INVALID_HANDLE;
2940                         goto fail;
2941                 }
2942
2943                 if (ISDOT(dir_fsp->fsp_name)) {
2944                         /*
2945                          * We're at the toplevel dir, the final file name
2946                          * must not contain ./, as this is filtered out
2947                          * normally by srvstr_get_path and unix_convert
2948                          * explicitly rejects paths containing ./.
2949                          */
2950                         parent_fname = talloc_strdup(talloc_tos(), "");
2951                         if (parent_fname == NULL) {
2952                                 status = NT_STATUS_NO_MEMORY;
2953                                 goto fail;
2954                         }
2955                 } else {
2956                         size_t dir_name_len = strlen(dir_fsp->fsp_name);
2957
2958                         /*
2959                          * Copy in the base directory name.
2960                          */
2961
2962                         parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2963                                                     dir_name_len+2);
2964                         if (parent_fname == NULL) {
2965                                 status = NT_STATUS_NO_MEMORY;
2966                                 goto fail;
2967                         }
2968                         memcpy(parent_fname, dir_fsp->fsp_name,
2969                                dir_name_len+1);
2970
2971                         /*
2972                          * Ensure it ends in a '/'.
2973                          * We used TALLOC_SIZE +2 to add space for the '/'.
2974                          */
2975
2976                         if(dir_name_len
2977                            && (parent_fname[dir_name_len-1] != '\\')
2978                            && (parent_fname[dir_name_len-1] != '/')) {
2979                                 parent_fname[dir_name_len] = '/';
2980                                 parent_fname[dir_name_len+1] = '\0';
2981                         }
2982                 }
2983
2984                 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2985                                         fname);
2986                 if (fname == NULL) {
2987                         status = NT_STATUS_NO_MEMORY;
2988                         goto fail;
2989                 }
2990         }
2991
2992         /*
2993          * Check to see if this is a mac fork of some kind.
2994          */
2995
2996         if (is_ntfs_stream_name(fname)) {
2997                 enum FAKE_FILE_TYPE fake_file_type;
2998
2999                 fake_file_type = is_fake_file(fname);
3000
3001                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3002
3003                         /*
3004                          * Here we go! support for changing the disk quotas
3005                          * --metze
3006                          *
3007                          * We need to fake up to open this MAGIC QUOTA file
3008                          * and return a valid FID.
3009                          *
3010                          * w2k close this file directly after openening xp
3011                          * also tries a QUERY_FILE_INFO on the file and then
3012                          * close it
3013                          */
3014                         status = open_fake_file(req, conn, req->vuid,
3015                                                 fake_file_type, fname,
3016                                                 access_mask, &fsp);
3017                         if (!NT_STATUS_IS_OK(status)) {
3018                                 goto fail;
3019                         }
3020
3021                         ZERO_STRUCT(sbuf);
3022                         goto done;
3023                 }
3024
3025                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3026                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3027                         goto fail;
3028                 }
3029         }
3030
3031         if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3032                 char *resolved_fname;
3033
3034                 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3035                                          &resolved_fname);
3036
3037                 if (!NT_STATUS_IS_OK(status)) {
3038                         /*
3039                          * For PATH_NOT_COVERED we had
3040                          * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3041                          *                 ERRSRV, ERRbadpath);
3042                          * Need to fix in callers
3043                          */
3044                         goto fail;
3045                 }
3046                 fname = resolved_fname;
3047         }
3048
3049         /*
3050          * Check if POSIX semantics are wanted.
3051          */
3052
3053         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3054                 case_state = set_posix_case_semantics(talloc_tos(), conn);
3055                 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3056         }
3057
3058         {
3059                 char *converted_fname;
3060
3061                 SET_STAT_INVALID(sbuf);
3062
3063                 status = unix_convert(talloc_tos(), conn, fname, False,
3064                                       &converted_fname, NULL, &sbuf);
3065                 if (!NT_STATUS_IS_OK(status)) {
3066                         goto fail;
3067                 }
3068                 fname = converted_fname;
3069         }
3070
3071         TALLOC_FREE(case_state);
3072
3073         /* All file access must go through check_name() */
3074
3075         status = check_name(conn, fname);
3076         if (!NT_STATUS_IS_OK(status)) {
3077                 goto fail;
3078         }
3079
3080         status = create_file_unixpath(
3081                 conn, req, fname, access_mask, share_access,
3082                 create_disposition, create_options, file_attributes,
3083                 oplock_request, allocation_size, sd, ea_list,
3084                 &fsp, &info, &sbuf);
3085
3086         if (!NT_STATUS_IS_OK(status)) {
3087                 goto fail;
3088         }
3089
3090  done:
3091         DEBUG(10, ("create_file: info=%d\n", info));
3092
3093         *result = fsp;
3094         if (pinfo != NULL) {
3095                 *pinfo = info;
3096         }
3097         if (psbuf != NULL) {
3098                 *psbuf = sbuf;
3099         }
3100         return NT_STATUS_OK;
3101
3102  fail:
3103         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3104
3105         if (fsp != NULL) {
3106                 close_file(req, fsp, ERROR_CLOSE);
3107                 fsp = NULL;
3108         }
3109         return status;
3110 }