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 #include "smbd/globals.h"
  24
  25 extern struct current_user current_user;
  26 extern const struct generic_mapping file_generic_mapping;
  27
  28 struct deferred_open_record {
  29         bool delayed_for_oplocks;
  30         struct file_id id;
  31 };
  32
  33 static NTSTATUS create_file_unixpath(connection_struct *conn,
  34                                      struct smb_request *req,
  35                                      struct smb_filename *smb_fname,
  36                                      uint32_t access_mask,
  37                                      uint32_t share_access,
  38                                      uint32_t create_disposition,
  39                                      uint32_t create_options,
  40                                      uint32_t file_attributes,
  41                                      uint32_t oplock_request,
  42                                      uint64_t allocation_size,
  43                                      struct security_descriptor *sd,
  44                                      struct ea_list *ea_list,
  45
  46                                      files_struct **result,
  47                                      int *pinfo);
  48
  49 /****************************************************************************
  50  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
  51 ****************************************************************************/
  52
  53 NTSTATUS smb1_file_se_access_check(connection_struct *conn,
  54                           const struct security_descriptor *sd,
  55                           const NT_USER_TOKEN *token,
  56                           uint32_t access_desired,
  57                           uint32_t *access_granted)
  58 {
  59         *access_granted = 0;
  60
  61         if (conn->server_info->utok.uid == 0 || conn->admin_user) {
  62                 /* I'm sorry sir, I didn't know you were root... */
  63                 *access_granted = access_desired;
  64                 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
  65                         *access_granted |= FILE_GENERIC_ALL;
  66                 }
  67                 return NT_STATUS_OK;
  68         }
  69
  70         return se_access_check(sd,
  71                                 token,
  72                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  73                                 access_granted);
  74 }
  75
  76 /****************************************************************************
  77  Check if we have open rights.
  78 ****************************************************************************/
  79
  80 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  81                                 const struct smb_filename *smb_fname,
  82                                 uint32_t access_mask,
  83                                 uint32_t *access_granted)
  84 {
  85         /* Check if we have rights to open. */
  86         NTSTATUS status;
  87         struct security_descriptor *sd = NULL;
  88
  89         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  90                 *access_granted = access_mask;
  91
  92                 DEBUG(10,("smbd_check_open_rights: not checking ACL "
  93                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  94                         smb_fname_str_dbg(smb_fname),
  95                         (unsigned int)*access_granted ));
  96                 return NT_STATUS_OK;
  97         }
  98
  99         if (access_mask == DELETE_ACCESS &&
 100                         VALID_STAT(smb_fname->st) &&
 101                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 102                 /* We can always delete a symlink. */
 103                 DEBUG(10,("smbd_check_open_rights: not checking ACL "
 104                         "on DELETE_ACCESS on symlink %s.\n",
 105                         smb_fname_str_dbg(smb_fname) ));
 106                 return NT_STATUS_OK;
 107         }
 108
 109         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 110                         (OWNER_SECURITY_INFORMATION |
 111                         GROUP_SECURITY_INFORMATION |
 112                         DACL_SECURITY_INFORMATION),&sd);
 113
 114         if (!NT_STATUS_IS_OK(status)) {
 115                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
 116                         "on %s: %s\n",
 117                         smb_fname_str_dbg(smb_fname),
 118                         nt_errstr(status)));
 119                 return status;
 120         }
 121
 122         status = smb1_file_se_access_check(conn,
 123                                 sd,
 124                                 conn->server_info->ptok,
 125                                 access_mask,
 126                                 access_granted);
 127
 128         DEBUG(10,("smbd_check_open_rights: file %s requesting "
 129                 "0x%x returning 0x%x (%s)\n",
 130                 smb_fname_str_dbg(smb_fname),
 131                 (unsigned int)access_mask,
 132                 (unsigned int)*access_granted,
 133                 nt_errstr(status) ));
 134
 135         if (!NT_STATUS_IS_OK(status)) {
 136                 if (DEBUGLEVEL >= 10) {
 137                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 138                                 smb_fname_str_dbg(smb_fname) ));
 139                         NDR_PRINT_DEBUG(security_descriptor, sd);
 140                 }
 141         }
 142
 143         TALLOC_FREE(sd);
 144
 145         return status;
 146 }
 147
 148 /****************************************************************************
 149  fd support routines - attempt to do a dos_open.
 150 ****************************************************************************/
 151
 152 static NTSTATUS fd_open(struct connection_struct *conn,
 153                     files_struct *fsp,
 154                     int flags,
 155                     mode_t mode)
 156 {
 157         struct smb_filename *smb_fname = fsp->fsp_name;
 158         NTSTATUS status = NT_STATUS_OK;
 159
 160 #ifdef O_NOFOLLOW
 161         /*
 162          * Never follow symlinks on a POSIX client. The
 163          * client should be doing this.
 164          */
 165
 166         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 167                 flags |= O_NOFOLLOW;
 168         }
 169 #endif
 170
 171         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 172         if (fsp->fh->fd == -1) {
 173                 status = map_nt_error_from_unix(errno);
 174                 if (errno == EMFILE) {
 175                         static time_t last_warned = 0L;
 176
 177                         if (time((time_t *) NULL) > last_warned) {
 178                                 DEBUG(0,("Too many open files, unable "
 179                                         "to open more!  smbd's max "
 180                                         "open files = %d\n",
 181                                         lp_max_open_files()));
 182                                 last_warned = time((time_t *) NULL);
 183                         }
 184                 }
 185
 186         }
 187
 188         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 189                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 190                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 191
 192         return status;
 193 }
 194
 195 /****************************************************************************
 196  Close the file associated with a fsp.
 197 ****************************************************************************/
 198
 199 NTSTATUS fd_close(files_struct *fsp)
 200 {
 201         int ret;
 202
 203         if (fsp->fh->fd == -1) {
 204                 return NT_STATUS_OK; /* What we used to call a stat open. */
 205         }
 206         if (fsp->fh->ref_count > 1) {
 207                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 208         }
 209
 210         ret = SMB_VFS_CLOSE(fsp);
 211         fsp->fh->fd = -1;
 212         if (ret == -1) {
 213                 return map_nt_error_from_unix(errno);
 214         }
 215         return NT_STATUS_OK;
 216 }
 217
 218 /****************************************************************************
 219  Change the ownership of a file to that of the parent directory.
 220  Do this by fd if possible.
 221 ****************************************************************************/
 222
 223 void change_file_owner_to_parent(connection_struct *conn,
 224                                         const char *inherit_from_dir,
 225                                         files_struct *fsp)
 226 {
 227         struct smb_filename *smb_fname_parent = NULL;
 228         NTSTATUS status;
 229         int ret;
 230
 231         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 232                                             NULL, NULL, &smb_fname_parent);
 233         if (!NT_STATUS_IS_OK(status)) {
 234                 return;
 235         }
 236
 237         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 238         if (ret == -1) {
 239                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 240                          "directory %s. Error was %s\n",
 241                          smb_fname_str_dbg(smb_fname_parent),
 242                          strerror(errno)));
 243                 return;
 244         }
 245
 246         become_root();
 247         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 248         unbecome_root();
 249         if (ret == -1) {
 250                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 251                          "file %s to parent directory uid %u. Error "
 252                          "was %s\n", fsp_str_dbg(fsp),
 253                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 254                          strerror(errno) ));
 255         } else {
 256                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 257                   "parent directory uid %u.\n", fsp_str_dbg(fsp),
 258                   (unsigned int)smb_fname_parent->st.st_ex_uid));
 259
 260                 /* Ensure the uid entry is updated. */
 261                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 262         }
 263
 264         TALLOC_FREE(smb_fname_parent);
 265 }
 266
 267 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 268                                        const char *inherit_from_dir,
 269                                        const char *fname,
 270                                        SMB_STRUCT_STAT *psbuf)
 271 {
 272         struct smb_filename *smb_fname_parent = NULL;
 273         struct smb_filename *smb_fname_cwd = NULL;
 274         char *saved_dir = NULL;
 275         TALLOC_CTX *ctx = talloc_tos();
 276         NTSTATUS status = NT_STATUS_OK;
 277         int ret;
 278
 279         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 280                                             &smb_fname_parent);
 281         if (!NT_STATUS_IS_OK(status)) {
 282                 return status;
 283         }
 284
 285         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 286         if (ret == -1) {
 287                 status = map_nt_error_from_unix(errno);
 288                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 289                          "directory %s. Error was %s\n",
 290                          smb_fname_str_dbg(smb_fname_parent),
 291                          strerror(errno)));
 292                 goto out;
 293         }
 294
 295         /* We've already done an lstat into psbuf, and we know it's a
 296            directory. If we can cd into the directory and the dev/ino
 297            are the same then we can safely chown without races as
 298            we're locking the directory in place by being in it.  This
 299            should work on any UNIX (thanks tridge :-). JRA.
 300         */
 301
 302         saved_dir = vfs_GetWd(ctx,conn);
 303         if (!saved_dir) {
 304                 status = map_nt_error_from_unix(errno);
 305                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 306                          "current working directory. Error was %s\n",
 307                          strerror(errno)));
 308                 goto out;
 309         }
 310
 311         /* Chdir into the new path. */
 312         if (vfs_ChDir(conn, fname) == -1) {
 313                 status = map_nt_error_from_unix(errno);
 314                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 315                          "current working directory to %s. Error "
 316                          "was %s\n", fname, strerror(errno) ));
 317                 goto chdir;
 318         }
 319
 320         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 321                                             &smb_fname_cwd);
 322         if (!NT_STATUS_IS_OK(status)) {
 323                 return status;
 324         }
 325
 326         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 327         if (ret == -1) {
 328                 status = map_nt_error_from_unix(errno);
 329                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 330                          "directory '.' (%s) Error was %s\n",
 331                          fname, strerror(errno)));
 332                 goto chdir;
 333         }
 334
 335         /* Ensure we're pointing at the same place. */
 336         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 337             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 338                 DEBUG(0,("change_dir_owner_to_parent: "
 339                          "device/inode on directory %s changed. "
 340                          "Refusing to chown !\n", fname ));
 341                 status = NT_STATUS_ACCESS_DENIED;
 342                 goto chdir;
 343         }
 344
 345         become_root();
 346         ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 347                             (gid_t)-1);
 348         unbecome_root();
 349         if (ret == -1) {
 350                 status = map_nt_error_from_unix(errno);
 351                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 352                           "directory %s to parent directory uid %u. "
 353                           "Error was %s\n", fname,
 354                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 355                           strerror(errno) ));
 356                 goto chdir;
 357         }
 358
 359         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 360                   "directory %s to parent directory uid %u.\n",
 361                   fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 362
 363         /* Ensure the uid entry is updated. */
 364         psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 365
 366  chdir:
 367         vfs_ChDir(conn,saved_dir);
 368  out:
 369         TALLOC_FREE(smb_fname_parent);
 370         TALLOC_FREE(smb_fname_cwd);
 371         return status;
 372 }
 373
 374 /****************************************************************************
 375  Open a file.
 376 ****************************************************************************/
 377
 378 static NTSTATUS open_file(files_struct *fsp,
 379                           connection_struct *conn,
 380                           struct smb_request *req,
 381                           const char *parent_dir,
 382                           int flags,
 383                           mode_t unx_mode,
 384                           uint32 access_mask, /* client requested access mask. */
 385                           uint32 open_access_mask) /* what we're actually using in the open. */
 386 {
 387         struct smb_filename *smb_fname = fsp->fsp_name;
 388         NTSTATUS status = NT_STATUS_OK;
 389         int accmode = (flags & O_ACCMODE);
 390         int local_flags = flags;
 391         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 392         bool file_created = false;
 393
 394         fsp->fh->fd = -1;
 395         errno = EPERM;
 396
 397         /* Check permissions */
 398
 399         /*
 400          * This code was changed after seeing a client open request
 401          * containing the open mode of (DENY_WRITE/read-only) with
 402          * the 'create if not exist' bit set. The previous code
 403          * would fail to open the file read only on a read-only share
 404          * as it was checking the flags parameter  directly against O_RDONLY,
 405          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 406          * JRA.
 407          */
 408
 409         if (!CAN_WRITE(conn)) {
 410                 /* It's a read-only share - fail if we wanted to write. */
 411                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 412                         DEBUG(3,("Permission denied opening %s\n",
 413                                  smb_fname_str_dbg(smb_fname)));
 414                         return NT_STATUS_ACCESS_DENIED;
 415                 } else if(flags & O_CREAT) {
 416                         /* We don't want to write - but we must make sure that
 417                            O_CREAT doesn't create the file if we have write
 418                            access into the directory.
 419                         */
 420                         flags &= ~(O_CREAT|O_EXCL);
 421                         local_flags &= ~(O_CREAT|O_EXCL);
 422                 }
 423         }
 424
 425         /*
 426          * This little piece of insanity is inspired by the
 427          * fact that an NT client can open a file for O_RDONLY,
 428          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 429          * If the client *can* write to the file, then it expects to
 430          * truncate the file, even though it is opening for readonly.
 431          * Quicken uses this stupid trick in backup file creation...
 432          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 433          * for helping track this one down. It didn't bite us in 2.0.x
 434          * as we always opened files read-write in that release. JRA.
 435          */
 436
 437         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 438                 DEBUG(10,("open_file: truncate requested on read-only open "
 439                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 440                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 441         }
 442
 443         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 444             (!file_existed && (local_flags & O_CREAT)) ||
 445             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 446                 const char *wild;
 447
 448                 /*
 449                  * We can't actually truncate here as the file may be locked.
 450                  * open_file_ntcreate will take care of the truncate later. JRA.
 451                  */
 452
 453                 local_flags &= ~O_TRUNC;
 454
 455 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 456                 /*
 457                  * We would block on opening a FIFO with no one else on the
 458                  * other end. Do what we used to do and add O_NONBLOCK to the
 459                  * open flags. JRA.
 460                  */
 461
 462                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 463                         local_flags |= O_NONBLOCK;
 464                 }
 465 #endif
 466
 467                 /* Don't create files with Microsoft wildcard characters. */
 468                 if (fsp->base_fsp) {
 469                         /*
 470                          * wildcard characters are allowed in stream names
 471                          * only test the basefilename
 472                          */
 473                         wild = fsp->base_fsp->fsp_name->base_name;
 474                 } else {
 475                         wild = smb_fname->base_name;
 476                 }
 477                 if ((local_flags & O_CREAT) && !file_existed &&
 478                     ms_has_wild(wild))  {
 479                         return NT_STATUS_OBJECT_NAME_INVALID;
 480                 }
 481
 482                 /* Actually do the open */
 483                 status = fd_open(conn, fsp, local_flags, unx_mode);
 484                 if (!NT_STATUS_IS_OK(status)) {
 485                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 486                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 487                                  nt_errstr(status),local_flags,flags));
 488                         return status;
 489                 }
 490
 491                 if ((local_flags & O_CREAT) && !file_existed) {
 492                         file_created = true;
 493                 }
 494
 495         } else {
 496                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 497                 if (file_existed) {
 498                         uint32_t access_granted = 0;
 499
 500                         status = smbd_check_open_rights(conn,
 501                                         smb_fname,
 502                                         access_mask,
 503                                         &access_granted);
 504                         if (!NT_STATUS_IS_OK(status)) {
 505                                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 506                                         /*
 507                                          * On NT_STATUS_ACCESS_DENIED, access_granted
 508                                          * contains the denied bits.
 509                                          */
 510
 511                                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 512                                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
 513                                                         (lp_map_readonly(SNUM(conn)) ||
 514                                                          lp_map_archive(SNUM(conn)) ||
 515                                                          lp_map_hidden(SNUM(conn)) ||
 516                                                          lp_map_system(SNUM(conn)))) {
 517                                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
 518
 519                                                 DEBUG(10,("open_file: "
 520                                                           "overrode "
 521                                                           "FILE_WRITE_"
 522                                                           "ATTRIBUTES "
 523                                                           "on file %s\n",
 524                                                           smb_fname_str_dbg(
 525                                                                   smb_fname)));
 526                                         }
 527
 528                                         if ((access_mask & DELETE_ACCESS) &&
 529                                             (access_granted & DELETE_ACCESS) &&
 530                                             can_delete_file_in_directory(conn,
 531                                                 smb_fname)) {
 532                                                 /* Were we trying to do a stat open
 533                                                  * for delete and didn't get DELETE
 534                                                  * access (only) ? Check if the
 535                                                  * directory allows DELETE_CHILD.
 536                                                  * See here:
 537                                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 538                                                  * for details. */
 539
 540                                                 access_granted &= ~DELETE_ACCESS;
 541
 542                                                 DEBUG(10,("open_file: "
 543                                                           "overrode "
 544                                                           "DELETE_ACCESS on "
 545                                                           "file %s\n",
 546                                                           smb_fname_str_dbg(
 547                                                                   smb_fname)));
 548                                         }
 549
 550                                         if (access_granted != 0) {
 551                                                 DEBUG(10,("open_file: Access "
 552                                                           "denied on file "
 553                                                           "%s\n",
 554                                                           smb_fname_str_dbg(
 555                                                                   smb_fname)));
 556                                                 return status;
 557                                         }
 558                                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 559                                     fsp->posix_open &&
 560                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
 561                                         /* This is a POSIX stat open for delete
 562                                          * or rename on a symlink that points
 563                                          * nowhere. Allow. */
 564                                         DEBUG(10,("open_file: allowing POSIX "
 565                                                   "open on bad symlink %s\n",
 566                                                   smb_fname_str_dbg(
 567                                                           smb_fname)));
 568                                 } else {
 569                                         DEBUG(10,("open_file: "
 570                                                   "smbd_check_open_rights on file "
 571                                                   "%s returned %s\n",
 572                                                   smb_fname_str_dbg(smb_fname),
 573                                                   nt_errstr(status) ));
 574                                         return status;
 575                                 }
 576                         }
 577                 }
 578         }
 579
 580         if (!file_existed) {
 581                 int ret;
 582
 583                 if (fsp->fh->fd == -1) {
 584                         ret = SMB_VFS_STAT(conn, smb_fname);
 585                 } else {
 586                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 587                         /* If we have an fd, this stat should succeed. */
 588                         if (ret == -1) {
 589                                 DEBUG(0,("Error doing fstat on open file %s "
 590                                          "(%s)\n",
 591                                          smb_fname_str_dbg(smb_fname),
 592                                          strerror(errno) ));
 593                         }
 594                 }
 595
 596                 /* For a non-io open, this stat failing means file not found. JRA */
 597                 if (ret == -1) {
 598                         status = map_nt_error_from_unix(errno);
 599                         fd_close(fsp);
 600                         return status;
 601                 }
 602
 603                 if (file_created) {
 604                         /* Do all inheritance work after we've
 605                            done a successful stat call and filled
 606                            in the stat struct in fsp->fsp_name. */
 607
 608                         /* Inherit the ACL if required */
 609                         if (lp_inherit_perms(SNUM(conn))) {
 610                                 inherit_access_posix_acl(conn, parent_dir,
 611                                                          smb_fname->base_name,
 612                                                          unx_mode);
 613                         }
 614
 615                         /* Change the owner if required. */
 616                         if (lp_inherit_owner(SNUM(conn))) {
 617                                 change_file_owner_to_parent(conn, parent_dir,
 618                                                             fsp);
 619                         }
 620
 621                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 622                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 623                                      smb_fname->base_name);
 624                 }
 625         }
 626
 627         /*
 628          * POSIX allows read-only opens of directories. We don't
 629          * want to do this (we use a different code path for this)
 630          * so catch a directory open and return an EISDIR. JRA.
 631          */
 632
 633         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 634                 fd_close(fsp);
 635                 errno = EISDIR;
 636                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 637         }
 638
 639         fsp->mode = smb_fname->st.st_ex_mode;
 640         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 641         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 642         fsp->file_pid = req ? req->smbpid : 0;
 643         fsp->can_lock = True;
 644         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 645         if (!CAN_WRITE(conn)) {
 646                 fsp->can_write = False;
 647         } else {
 648                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 649                         True : False;
 650         }
 651         fsp->print_file = False;
 652         fsp->modified = False;
 653         fsp->sent_oplock_break = NO_BREAK_SENT;
 654         fsp->is_directory = False;
 655         if (conn->aio_write_behind_list &&
 656             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 657                        conn->case_sensitive)) {
 658                 fsp->aio_write_behind = True;
 659         }
 660
 661         fsp->wcp = NULL; /* Write cache pointer. */
 662
 663         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 664                  conn->server_info->unix_name,
 665                  smb_fname_str_dbg(smb_fname),
 666                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 667                  conn->num_files_open));
 668
 669         errno = 0;
 670         return NT_STATUS_OK;
 671 }
 672
 673 /****************************************************************************
 674  Check if we can open a file with a share mode.
 675  Returns True if conflict, False if not.
 676 ****************************************************************************/
 677
 678 static bool share_conflict(struct share_mode_entry *entry,
 679                            uint32 access_mask,
 680                            uint32 share_access)
 681 {
 682         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 683                   "entry->share_access = 0x%x, "
 684                   "entry->private_options = 0x%x\n",
 685                   (unsigned int)entry->access_mask,
 686                   (unsigned int)entry->share_access,
 687                   (unsigned int)entry->private_options));
 688
 689         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 690                   (unsigned int)access_mask, (unsigned int)share_access));
 691
 692         if ((entry->access_mask & (FILE_WRITE_DATA|
 693                                    FILE_APPEND_DATA|
 694                                    FILE_READ_DATA|
 695                                    FILE_EXECUTE|
 696                                    DELETE_ACCESS)) == 0) {
 697                 DEBUG(10,("share_conflict: No conflict due to "
 698                           "entry->access_mask = 0x%x\n",
 699                           (unsigned int)entry->access_mask ));
 700                 return False;
 701         }
 702
 703         if ((access_mask & (FILE_WRITE_DATA|
 704                             FILE_APPEND_DATA|
 705                             FILE_READ_DATA|
 706                             FILE_EXECUTE|
 707                             DELETE_ACCESS)) == 0) {
 708                 DEBUG(10,("share_conflict: No conflict due to "
 709                           "access_mask = 0x%x\n",
 710                           (unsigned int)access_mask ));
 711                 return False;
 712         }
 713
 714 #if 1 /* JRA TEST - Superdebug. */
 715 #define CHECK_MASK(num, am, right, sa, share) \
 716         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 717                 (unsigned int)(num), (unsigned int)(am), \
 718                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 719         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 720                 (unsigned int)(num), (unsigned int)(sa), \
 721                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 722         if (((am) & (right)) && !((sa) & (share))) { \
 723                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 724 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 725                         (unsigned int)(share) )); \
 726                 return True; \
 727         }
 728 #else
 729 #define CHECK_MASK(num, am, right, sa, share) \
 730         if (((am) & (right)) && !((sa) & (share))) { \
 731                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 732 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 733                         (unsigned int)(share) )); \
 734                 return True; \
 735         }
 736 #endif
 737
 738         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 739                    share_access, FILE_SHARE_WRITE);
 740         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 741                    entry->share_access, FILE_SHARE_WRITE);
 742
 743         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 744                    share_access, FILE_SHARE_READ);
 745         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 746                    entry->share_access, FILE_SHARE_READ);
 747
 748         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 749                    share_access, FILE_SHARE_DELETE);
 750         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 751                    entry->share_access, FILE_SHARE_DELETE);
 752
 753         DEBUG(10,("share_conflict: No conflict.\n"));
 754         return False;
 755 }
 756
 757 #if defined(DEVELOPER)
 758 static void validate_my_share_entries(int num,
 759                                       struct share_mode_entry *share_entry)
 760 {
 761         files_struct *fsp;
 762
 763         if (!procid_is_me(&share_entry->pid)) {
 764                 return;
 765         }
 766
 767         if (is_deferred_open_entry(share_entry) &&
 768             !open_was_deferred(share_entry->op_mid)) {
 769                 char *str = talloc_asprintf(talloc_tos(),
 770                         "Got a deferred entry without a request: "
 771                         "PANIC: %s\n",
 772                         share_mode_str(talloc_tos(), num, share_entry));
 773                 smb_panic(str);
 774         }
 775
 776         if (!is_valid_share_mode_entry(share_entry)) {
 777                 return;
 778         }
 779
 780         fsp = file_find_dif(share_entry->id,
 781                             share_entry->share_file_id);
 782         if (!fsp) {
 783                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 784                          share_mode_str(talloc_tos(), num, share_entry) ));
 785                 smb_panic("validate_my_share_entries: Cannot match a "
 786                           "share entry with an open file\n");
 787         }
 788
 789         if (is_deferred_open_entry(share_entry) ||
 790             is_unused_share_mode_entry(share_entry)) {
 791                 goto panic;
 792         }
 793
 794         if ((share_entry->op_type == NO_OPLOCK) &&
 795             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 796                 /* Someone has already written to it, but I haven't yet
 797                  * noticed */
 798                 return;
 799         }
 800
 801         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 802                 goto panic;
 803         }
 804
 805         return;
 806
 807  panic:
 808         {
 809                 char *str;
 810                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 811                          share_mode_str(talloc_tos(), num, share_entry) ));
 812                 str = talloc_asprintf(talloc_tos(),
 813                         "validate_my_share_entries: "
 814                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 815                          fsp->fsp_name->base_name,
 816                          (unsigned int)fsp->oplock_type,
 817                          (unsigned int)share_entry->op_type );
 818                 smb_panic(str);
 819         }
 820 }
 821 #endif
 822
 823 bool is_stat_open(uint32 access_mask)
 824 {
 825         return (access_mask &&
 826                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 827                                   FILE_WRITE_ATTRIBUTES))==0) &&
 828                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 829                                  FILE_WRITE_ATTRIBUTES)) != 0));
 830 }
 831
 832 /****************************************************************************
 833  Deal with share modes
 834  Invarient: Share mode must be locked on entry and exit.
 835  Returns -1 on error, or number of share modes on success (may be zero).
 836 ****************************************************************************/
 837
 838 static NTSTATUS open_mode_check(connection_struct *conn,
 839                                 struct share_mode_lock *lck,
 840                                 uint32 access_mask,
 841                                 uint32 share_access,
 842                                 uint32 create_options,
 843                                 bool *file_existed)
 844 {
 845         int i;
 846
 847         if(lck->num_share_modes == 0) {
 848                 return NT_STATUS_OK;
 849         }
 850
 851         *file_existed = True;
 852
 853         /* A delete on close prohibits everything */
 854
 855         if (lck->delete_on_close) {
 856                 return NT_STATUS_DELETE_PENDING;
 857         }
 858
 859         if (is_stat_open(access_mask)) {
 860                 /* Stat open that doesn't trigger oplock breaks or share mode
 861                  * checks... ! JRA. */
 862                 return NT_STATUS_OK;
 863         }
 864
 865         /*
 866          * Check if the share modes will give us access.
 867          */
 868
 869 #if defined(DEVELOPER)
 870         for(i = 0; i < lck->num_share_modes; i++) {
 871                 validate_my_share_entries(i, &lck->share_modes[i]);
 872         }
 873 #endif
 874
 875         if (!lp_share_modes(SNUM(conn))) {
 876                 return NT_STATUS_OK;
 877         }
 878
 879         /* Now we check the share modes, after any oplock breaks. */
 880         for(i = 0; i < lck->num_share_modes; i++) {
 881
 882                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 883                         continue;
 884                 }
 885
 886                 /* someone else has a share lock on it, check to see if we can
 887                  * too */
 888                 if (share_conflict(&lck->share_modes[i],
 889                                    access_mask, share_access)) {
 890                         return NT_STATUS_SHARING_VIOLATION;
 891                 }
 892         }
 893
 894         return NT_STATUS_OK;
 895 }
 896
 897 /*
 898  * Send a break message to the oplock holder and delay the open for
 899  * our client.
 900  */
 901
 902 static NTSTATUS send_break_message(files_struct *fsp,
 903                                         struct share_mode_entry *exclusive,
 904                                         uint16 mid,
 905                                         int oplock_request)
 906 {
 907         NTSTATUS status;
 908         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 909
 910         DEBUG(10, ("Sending break request to PID %s\n",
 911                    procid_str_static(&exclusive->pid)));
 912         exclusive->op_mid = mid;
 913
 914         /* Create the message. */
 915         share_mode_entry_to_message(msg, exclusive);
 916
 917         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 918            don't want this set in the share mode struct pointed to by lck. */
 919
 920         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 921                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 922         }
 923
 924         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
 925                                     MSG_SMB_BREAK_REQUEST,
 926                                     (uint8 *)msg,
 927                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 928         if (!NT_STATUS_IS_OK(status)) {
 929                 DEBUG(3, ("Could not send oplock break message: %s\n",
 930                           nt_errstr(status)));
 931         }
 932
 933         return status;
 934 }
 935
 936 /*
 937  * 1) No files open at all or internal open: Grant whatever the client wants.
 938  *
 939  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 940  *    request, break if the oplock around is a batch oplock. If it's another
 941  *    requested access type, break.
 942  *
 943  * 3) Only level2 around: Grant level2 and do nothing else.
 944  */
 945
 946 static bool delay_for_oplocks(struct share_mode_lock *lck,
 947                               files_struct *fsp,
 948                               uint16 mid,
 949                               int pass_number,
 950                               int oplock_request)
 951 {
 952         int i;
 953         struct share_mode_entry *exclusive = NULL;
 954         bool valid_entry = false;
 955         bool have_level2 = false;
 956         bool have_a_none_oplock = false;
 957         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
 958                             lp_level2_oplocks(SNUM(fsp->conn));
 959
 960         if (oplock_request & INTERNAL_OPEN_ONLY) {
 961                 fsp->oplock_type = NO_OPLOCK;
 962         }
 963
 964         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 965                 return false;
 966         }
 967
 968         for (i=0; i<lck->num_share_modes; i++) {
 969
 970                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 971                         continue;
 972                 }
 973
 974                 /* At least one entry is not an invalid or deferred entry. */
 975                 valid_entry = true;
 976
 977                 if (pass_number == 1) {
 978                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 979                                 SMB_ASSERT(exclusive == NULL);
 980                                 exclusive = &lck->share_modes[i];
 981                         }
 982                 } else {
 983                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 984                                 SMB_ASSERT(exclusive == NULL);
 985                                 exclusive = &lck->share_modes[i];
 986                         }
 987                 }
 988
 989                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 990                         SMB_ASSERT(exclusive == NULL);
 991                         have_level2 = true;
 992                 }
 993
 994                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
 995                         have_a_none_oplock = true;
 996                 }
 997         }
 998
 999         if (exclusive != NULL) { /* Found an exclusive oplock */
1000                 SMB_ASSERT(!have_level2);
1001                 send_break_message(fsp, exclusive, mid, oplock_request);
1002                 return true;
1003         }
1004
1005         /*
1006          * Match what was requested (fsp->oplock_type) with
1007          * what was found in the existing share modes.
1008          */
1009
1010         if (!valid_entry) {
1011                 /* All entries are placeholders or deferred.
1012                  * Directly grant whatever the client wants. */
1013                 if (fsp->oplock_type == NO_OPLOCK) {
1014                         /* Store a level2 oplock, but don't tell the client */
1015                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1016                 }
1017         } else if (have_a_none_oplock) {
1018                 fsp->oplock_type = NO_OPLOCK;
1019         } else if (have_level2) {
1020                 if (fsp->oplock_type == NO_OPLOCK ||
1021                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1022                         /* Store a level2 oplock, but don't tell the client */
1023                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1024                 } else {
1025                         fsp->oplock_type = LEVEL_II_OPLOCK;
1026                 }
1027         } else {
1028                 /* This case can never happen. */
1029                 SMB_ASSERT(1);
1030         }
1031
1032         /*
1033          * Don't grant level2 to clients that don't want them
1034          * or if we've turned them off.
1035          */
1036         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1037                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1038         }
1039
1040         DEBUG(10,("delay_for_oplocks: oplock type 0x%x on file %s\n",
1041                   fsp->oplock_type, fsp_str_dbg(fsp)));
1042
1043         /* No delay. */
1044         return false;
1045 }
1046
1047 bool request_timed_out(struct timeval request_time,
1048                        struct timeval timeout)
1049 {
1050         struct timeval now, end_time;
1051         GetTimeOfDay(&now);
1052         end_time = timeval_sum(&request_time, &timeout);
1053         return (timeval_compare(&end_time, &now) < 0);
1054 }
1055
1056 /****************************************************************************
1057  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1058 ****************************************************************************/
1059
1060 static void defer_open(struct share_mode_lock *lck,
1061                        struct timeval request_time,
1062                        struct timeval timeout,
1063                        struct smb_request *req,
1064                        struct deferred_open_record *state)
1065 {
1066         int i;
1067
1068         /* Paranoia check */
1069
1070         for (i=0; i<lck->num_share_modes; i++) {
1071                 struct share_mode_entry *e = &lck->share_modes[i];
1072
1073                 if (!is_deferred_open_entry(e)) {
1074                         continue;
1075                 }
1076
1077                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1078                         DEBUG(0, ("Trying to defer an already deferred "
1079                                   "request: mid=%d, exiting\n", req->mid));
1080                         exit_server("attempt to defer a deferred request");
1081                 }
1082         }
1083
1084         /* End paranoia check */
1085
1086         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1087                   "open entry for mid %u\n",
1088                   (unsigned int)request_time.tv_sec,
1089                   (unsigned int)request_time.tv_usec,
1090                   (unsigned int)req->mid));
1091
1092         if (!push_deferred_smb_message(req, request_time, timeout,
1093                                        (char *)state, sizeof(*state))) {
1094                 exit_server("push_deferred_smb_message failed");
1095         }
1096         add_deferred_open(lck, req->mid, request_time, state->id);
1097 }
1098
1099
1100 /****************************************************************************
1101  On overwrite open ensure that the attributes match.
1102 ****************************************************************************/
1103
1104 bool open_match_attributes(connection_struct *conn,
1105                            uint32 old_dos_attr,
1106                            uint32 new_dos_attr,
1107                            mode_t existing_unx_mode,
1108                            mode_t new_unx_mode,
1109                            mode_t *returned_unx_mode)
1110 {
1111         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1112
1113         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1114         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1115
1116         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1117            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1118                 *returned_unx_mode = new_unx_mode;
1119         } else {
1120                 *returned_unx_mode = (mode_t)0;
1121         }
1122
1123         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1124                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1125                   "returned_unx_mode = 0%o\n",
1126                   (unsigned int)old_dos_attr,
1127                   (unsigned int)existing_unx_mode,
1128                   (unsigned int)new_dos_attr,
1129                   (unsigned int)*returned_unx_mode ));
1130
1131         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1132         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1133                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1134                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1135                         return False;
1136                 }
1137         }
1138         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1139                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1140                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1141                         return False;
1142                 }
1143         }
1144         return True;
1145 }
1146
1147 /****************************************************************************
1148  Special FCB or DOS processing in the case of a sharing violation.
1149  Try and find a duplicated file handle.
1150 ****************************************************************************/
1151
1152 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1153                                      connection_struct *conn,
1154                                      files_struct *fsp_to_dup_into,
1155                                      const struct smb_filename *smb_fname,
1156                                      struct file_id id,
1157                                      uint16 file_pid,
1158                                      uint16 vuid,
1159                                      uint32 access_mask,
1160                                      uint32 share_access,
1161                                      uint32 create_options)
1162 {
1163         files_struct *fsp;
1164
1165         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1166                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1167
1168         for(fsp = file_find_di_first(id); fsp;
1169             fsp = file_find_di_next(fsp)) {
1170
1171                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1172                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1173                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1174                           fsp->fh->fd, (unsigned int)fsp->vuid,
1175                           (unsigned int)fsp->file_pid,
1176                           (unsigned int)fsp->fh->private_options,
1177                           (unsigned int)fsp->access_mask ));
1178
1179                 if (fsp->fh->fd != -1 &&
1180                     fsp->vuid == vuid &&
1181                     fsp->file_pid == file_pid &&
1182                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1183                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1184                     (fsp->access_mask & FILE_WRITE_DATA) &&
1185                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1186                     strequal(fsp->fsp_name->stream_name,
1187                              smb_fname->stream_name)) {
1188                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1189                         break;
1190                 }
1191         }
1192
1193         if (!fsp) {
1194                 return NT_STATUS_NOT_FOUND;
1195         }
1196
1197         /* quite an insane set of semantics ... */
1198         if (is_executable(smb_fname->base_name) &&
1199             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1200                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1201                 return NT_STATUS_INVALID_PARAMETER;
1202         }
1203
1204         /* We need to duplicate this fsp. */
1205         return dup_file_fsp(req, fsp, access_mask, share_access,
1206                             create_options, fsp_to_dup_into);
1207 }
1208
1209 static void schedule_defer_open(struct share_mode_lock *lck,
1210                                 struct timeval request_time,
1211                                 struct smb_request *req)
1212 {
1213         struct deferred_open_record state;
1214
1215         /* This is a relative time, added to the absolute
1216            request_time value to get the absolute timeout time.
1217            Note that if this is the second or greater time we enter
1218            this codepath for this particular request mid then
1219            request_time is left as the absolute time of the *first*
1220            time this request mid was processed. This is what allows
1221            the request to eventually time out. */
1222
1223         struct timeval timeout;
1224
1225         /* Normally the smbd we asked should respond within
1226          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1227          * the client did, give twice the timeout as a safety
1228          * measure here in case the other smbd is stuck
1229          * somewhere else. */
1230
1231         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1232
1233         /* Nothing actually uses state.delayed_for_oplocks
1234            but it's handy to differentiate in debug messages
1235            between a 30 second delay due to oplock break, and
1236            a 1 second delay for share mode conflicts. */
1237
1238         state.delayed_for_oplocks = True;
1239         state.id = lck->id;
1240
1241         if (!request_timed_out(request_time, timeout)) {
1242                 defer_open(lck, request_time, timeout, req, &state);
1243         }
1244 }
1245
1246 /****************************************************************************
1247  Work out what access_mask to use from what the client sent us.
1248 ****************************************************************************/
1249
1250 static NTSTATUS calculate_access_mask(connection_struct *conn,
1251                                         const struct smb_filename *smb_fname,
1252                                         bool file_existed,
1253                                         uint32_t access_mask,
1254                                         uint32_t *access_mask_out)
1255 {
1256         NTSTATUS status;
1257
1258         /*
1259          * Convert GENERIC bits to specific bits.
1260          */
1261
1262         se_map_generic(&access_mask, &file_generic_mapping);
1263
1264         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1265         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1266                 if (file_existed) {
1267
1268                         struct security_descriptor *sd;
1269                         uint32_t access_granted = 0;
1270
1271                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1272                                         (OWNER_SECURITY_INFORMATION |
1273                                         GROUP_SECURITY_INFORMATION |
1274                                         DACL_SECURITY_INFORMATION),&sd);
1275
1276                         if (!NT_STATUS_IS_OK(status)) {
1277                                 DEBUG(10, ("calculate_access_mask: Could not get acl "
1278                                         "on file %s: %s\n",
1279                                         smb_fname_str_dbg(smb_fname),
1280                                         nt_errstr(status)));
1281                                 return NT_STATUS_ACCESS_DENIED;
1282                         }
1283
1284                         status = smb1_file_se_access_check(conn,
1285                                         sd,
1286                                         conn->server_info->ptok,
1287                                         access_mask,
1288                                         &access_granted);
1289
1290                         TALLOC_FREE(sd);
1291
1292                         if (!NT_STATUS_IS_OK(status)) {
1293                                 DEBUG(10, ("calculate_access_mask: Access denied on "
1294                                         "file %s: when calculating maximum access\n",
1295                                         smb_fname_str_dbg(smb_fname)));
1296                                 return NT_STATUS_ACCESS_DENIED;
1297                         }
1298
1299                         access_mask = access_granted;
1300                 } else {
1301                         access_mask = FILE_GENERIC_ALL;
1302                 }
1303         }
1304
1305         *access_mask_out = access_mask;
1306         return NT_STATUS_OK;
1307 }
1308
1309 /****************************************************************************
1310  Open a file with a share mode. Passed in an already created files_struct *.
1311 ****************************************************************************/
1312
1313 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1314                             struct smb_request *req,
1315                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1316                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1317                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1318                             uint32 create_options,      /* options such as delete on close. */
1319                             uint32 new_dos_attributes,  /* attributes used for new file. */
1320                             int oplock_request,         /* internal Samba oplock codes. */
1321                                                         /* Information (FILE_EXISTS etc.) */
1322                             int *pinfo,
1323                             files_struct *fsp)
1324 {
1325         struct smb_filename *smb_fname = fsp->fsp_name;
1326         int flags=0;
1327         int flags2=0;
1328         bool file_existed = VALID_STAT(smb_fname->st);
1329         bool def_acl = False;
1330         bool posix_open = False;
1331         bool new_file_created = False;
1332         bool clear_ads = false;
1333         struct file_id id;
1334         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1335         mode_t new_unx_mode = (mode_t)0;
1336         mode_t unx_mode = (mode_t)0;
1337         int info;
1338         uint32 existing_dos_attributes = 0;
1339         struct pending_message_list *pml = NULL;
1340         struct timeval request_time = timeval_zero();
1341         struct share_mode_lock *lck = NULL;
1342         uint32 open_access_mask = access_mask;
1343         NTSTATUS status;
1344         char *parent_dir;
1345
1346         ZERO_STRUCT(id);
1347
1348         if (conn->printer) {
1349                 /*
1350                  * Printers are handled completely differently.
1351                  * Most of the passed parameters are ignored.
1352                  */
1353
1354                 if (pinfo) {
1355                         *pinfo = FILE_WAS_CREATED;
1356                 }
1357
1358                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1359                            smb_fname_str_dbg(smb_fname)));
1360
1361                 if (!req) {
1362                         DEBUG(0,("open_file_ntcreate: printer open without "
1363                                 "an SMB request!\n"));
1364                         return NT_STATUS_INTERNAL_ERROR;
1365                 }
1366
1367                 return print_fsp_open(req, conn, smb_fname->base_name,
1368                                       req->vuid, fsp);
1369         }
1370
1371         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1372                             NULL)) {
1373                 return NT_STATUS_NO_MEMORY;
1374         }
1375
1376         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1377                 posix_open = True;
1378                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1379                 new_dos_attributes = 0;
1380         } else {
1381                 /* Windows allows a new file to be created and
1382                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1383                    sent by the client. Do the same. */
1384
1385                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1386
1387                 /* We add aARCH to this as this mode is only used if the file is
1388                  * created new. */
1389                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1390                                      smb_fname, parent_dir);
1391         }
1392
1393         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1394                    "access_mask=0x%x share_access=0x%x "
1395                    "create_disposition = 0x%x create_options=0x%x "
1396                    "unix mode=0%o oplock_request=%d\n",
1397                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1398                    access_mask, share_access, create_disposition,
1399                    create_options, (unsigned int)unx_mode, oplock_request));
1400
1401         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1402                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1403                 return NT_STATUS_INTERNAL_ERROR;
1404         }
1405
1406         /*
1407          * Only non-internal opens can be deferred at all
1408          */
1409
1410         if ((req != NULL)
1411             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1412                 struct deferred_open_record *state =
1413                         (struct deferred_open_record *)pml->private_data.data;
1414
1415                 /* Remember the absolute time of the original
1416                    request with this mid. We'll use it later to
1417                    see if this has timed out. */
1418
1419                 request_time = pml->request_time;
1420
1421                 /* Remove the deferred open entry under lock. */
1422                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1423                                           NULL);
1424                 if (lck == NULL) {
1425                         DEBUG(0, ("could not get share mode lock\n"));
1426                 } else {
1427                         del_deferred_open_entry(lck, req->mid);
1428                         TALLOC_FREE(lck);
1429                 }
1430
1431                 /* Ensure we don't reprocess this message. */
1432                 remove_deferred_open_smb_message(req->mid);
1433         }
1434
1435         if (!posix_open) {
1436                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1437                 if (file_existed) {
1438                         existing_dos_attributes = dos_mode(conn, smb_fname);
1439                 }
1440         }
1441
1442         /* ignore any oplock requests if oplocks are disabled */
1443         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1444             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1445                 /* Mask off everything except the private Samba bits. */
1446                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1447         }
1448
1449         /* this is for OS/2 long file names - say we don't support them */
1450         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1451                 /* OS/2 Workplace shell fix may be main code stream in a later
1452                  * release. */
1453                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1454                          "supported.\n"));
1455                 if (use_nt_status()) {
1456                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1457                 }
1458                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1459         }
1460
1461         switch( create_disposition ) {
1462                 /*
1463                  * Currently we're using FILE_SUPERSEDE as the same as
1464                  * FILE_OVERWRITE_IF but they really are
1465                  * different. FILE_SUPERSEDE deletes an existing file
1466                  * (requiring delete access) then recreates it.
1467                  */
1468                 case FILE_SUPERSEDE:
1469                         /* If file exists replace/overwrite. If file doesn't
1470                          * exist create. */
1471                         flags2 |= (O_CREAT | O_TRUNC);
1472                         clear_ads = true;
1473                         break;
1474
1475                 case FILE_OVERWRITE_IF:
1476                         /* If file exists replace/overwrite. If file doesn't
1477                          * exist create. */
1478                         flags2 |= (O_CREAT | O_TRUNC);
1479                         clear_ads = true;
1480                         break;
1481
1482                 case FILE_OPEN:
1483                         /* If file exists open. If file doesn't exist error. */
1484                         if (!file_existed) {
1485                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1486                                          "requested for file %s and file "
1487                                          "doesn't exist.\n",
1488                                          smb_fname_str_dbg(smb_fname)));
1489                                 errno = ENOENT;
1490                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1491                         }
1492                         break;
1493
1494                 case FILE_OVERWRITE:
1495                         /* If file exists overwrite. If file doesn't exist
1496                          * error. */
1497                         if (!file_existed) {
1498                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1499                                          "requested for file %s and file "
1500                                          "doesn't exist.\n",
1501                                          smb_fname_str_dbg(smb_fname) ));
1502                                 errno = ENOENT;
1503                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1504                         }
1505                         flags2 |= O_TRUNC;
1506                         clear_ads = true;
1507                         break;
1508
1509                 case FILE_CREATE:
1510                         /* If file exists error. If file doesn't exist
1511                          * create. */
1512                         if (file_existed) {
1513                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1514                                          "requested for file %s and file "
1515                                          "already exists.\n",
1516                                          smb_fname_str_dbg(smb_fname)));
1517                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1518                                         errno = EISDIR;
1519                                 } else {
1520                                         errno = EEXIST;
1521                                 }
1522                                 return map_nt_error_from_unix(errno);
1523                         }
1524                         flags2 |= (O_CREAT|O_EXCL);
1525                         break;
1526
1527                 case FILE_OPEN_IF:
1528                         /* If file exists open. If file doesn't exist
1529                          * create. */
1530                         flags2 |= O_CREAT;
1531                         break;
1532
1533                 default:
1534                         return NT_STATUS_INVALID_PARAMETER;
1535         }
1536
1537         /* We only care about matching attributes on file exists and
1538          * overwrite. */
1539
1540         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1541                              (create_disposition == FILE_OVERWRITE_IF))) {
1542                 if (!open_match_attributes(conn, existing_dos_attributes,
1543                                            new_dos_attributes,
1544                                            smb_fname->st.st_ex_mode,
1545                                            unx_mode, &new_unx_mode)) {
1546                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1547                                  "for file %s (%x %x) (0%o, 0%o)\n",
1548                                  smb_fname_str_dbg(smb_fname),
1549                                  existing_dos_attributes,
1550                                  new_dos_attributes,
1551                                  (unsigned int)smb_fname->st.st_ex_mode,
1552                                  (unsigned int)unx_mode ));
1553                         errno = EACCES;
1554                         return NT_STATUS_ACCESS_DENIED;
1555                 }
1556         }
1557
1558         status = calculate_access_mask(conn, smb_fname, file_existed,
1559                                         access_mask,
1560                                         &access_mask);
1561         if (!NT_STATUS_IS_OK(status)) {
1562                 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1563                         "on file %s returned %s\n",
1564                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1565                 return status;
1566         }
1567
1568         open_access_mask = access_mask;
1569
1570         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1571                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1572         }
1573
1574         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1575                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1576                     access_mask));
1577
1578         /*
1579          * Note that we ignore the append flag as append does not
1580          * mean the same thing under DOS and Unix.
1581          */
1582
1583         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1584                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1585                 /* DENY_DOS opens are always underlying read-write on the
1586                    file handle, no matter what the requested access mask
1587                     says. */
1588                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1589                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1590                         flags = O_RDWR;
1591                 } else {
1592                         flags = O_WRONLY;
1593                 }
1594         } else {
1595                 flags = O_RDONLY;
1596         }
1597
1598         /*
1599          * Currently we only look at FILE_WRITE_THROUGH for create options.
1600          */
1601
1602 #if defined(O_SYNC)
1603         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1604                 flags2 |= O_SYNC;
1605         }
1606 #endif /* O_SYNC */
1607
1608         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1609                 flags2 |= O_APPEND;
1610         }
1611
1612         if (!posix_open && !CAN_WRITE(conn)) {
1613                 /*
1614                  * We should really return a permission denied error if either
1615                  * O_CREAT or O_TRUNC are set, but for compatibility with
1616                  * older versions of Samba we just AND them out.
1617                  */
1618                 flags2 &= ~(O_CREAT|O_TRUNC);
1619         }
1620
1621         /*
1622          * Ensure we can't write on a read-only share or file.
1623          */
1624
1625         if (flags != O_RDONLY && file_existed &&
1626             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1627                 DEBUG(5,("open_file_ntcreate: write access requested for "
1628                          "file %s on read only %s\n",
1629                          smb_fname_str_dbg(smb_fname),
1630                          !CAN_WRITE(conn) ? "share" : "file" ));
1631                 errno = EACCES;
1632                 return NT_STATUS_ACCESS_DENIED;
1633         }
1634
1635         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1636         fsp->share_access = share_access;
1637         fsp->fh->private_options = create_options;
1638         fsp->access_mask = open_access_mask; /* We change this to the
1639                                               * requested access_mask after
1640                                               * the open is done. */
1641         fsp->posix_open = posix_open;
1642
1643         /* Ensure no SAMBA_PRIVATE bits can be set. */
1644         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1645
1646         if (timeval_is_zero(&request_time)) {
1647                 request_time = fsp->open_time;
1648         }
1649
1650         if (file_existed) {
1651                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1652                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1653
1654                 lck = get_share_mode_lock(talloc_tos(), id,
1655                                           conn->connectpath,
1656                                           smb_fname, &old_write_time);
1657
1658                 if (lck == NULL) {
1659                         DEBUG(0, ("Could not get share mode lock\n"));
1660                         return NT_STATUS_SHARING_VIOLATION;
1661                 }
1662
1663                 /* First pass - send break only on batch oplocks. */
1664                 if ((req != NULL)
1665                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1666                                          oplock_request)) {
1667                         schedule_defer_open(lck, request_time, req);
1668                         TALLOC_FREE(lck);
1669                         return NT_STATUS_SHARING_VIOLATION;
1670                 }
1671
1672                 /* Use the client requested access mask here, not the one we
1673                  * open with. */
1674                 status = open_mode_check(conn, lck, access_mask, share_access,
1675                                          create_options, &file_existed);
1676
1677                 if (NT_STATUS_IS_OK(status)) {
1678                         /* We might be going to allow this open. Check oplock
1679                          * status again. */
1680                         /* Second pass - send break for both batch or
1681                          * exclusive oplocks. */
1682                         if ((req != NULL)
1683                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1684                                                   oplock_request)) {
1685                                 schedule_defer_open(lck, request_time, req);
1686                                 TALLOC_FREE(lck);
1687                                 return NT_STATUS_SHARING_VIOLATION;
1688                         }
1689                 }
1690
1691                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1692                         /* DELETE_PENDING is not deferred for a second */
1693                         TALLOC_FREE(lck);
1694                         return status;
1695                 }
1696
1697                 if (!NT_STATUS_IS_OK(status)) {
1698                         uint32 can_access_mask;
1699                         bool can_access = True;
1700
1701                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1702
1703                         /* Check if this can be done with the deny_dos and fcb
1704                          * calls. */
1705                         if (create_options &
1706                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1707                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1708                                 if (req == NULL) {
1709                                         DEBUG(0, ("DOS open without an SMB "
1710                                                   "request!\n"));
1711                                         TALLOC_FREE(lck);
1712                                         return NT_STATUS_INTERNAL_ERROR;
1713                                 }
1714
1715                                 /* Use the client requested access mask here,
1716                                  * not the one we open with. */
1717                                 status = fcb_or_dos_open(req,
1718                                                         conn,
1719                                                         fsp,
1720                                                         smb_fname,
1721                                                         id,
1722                                                         req->smbpid,
1723                                                         req->vuid,
1724                                                         access_mask,
1725                                                         share_access,
1726                                                         create_options);
1727
1728                                 if (NT_STATUS_IS_OK(status)) {
1729                                         TALLOC_FREE(lck);
1730                                         if (pinfo) {
1731                                                 *pinfo = FILE_WAS_OPENED;
1732                                         }
1733                                         return NT_STATUS_OK;
1734                                 }
1735                         }
1736
1737                         /*
1738                          * This next line is a subtlety we need for
1739                          * MS-Access. If a file open will fail due to share
1740                          * permissions and also for security (access) reasons,
1741                          * we need to return the access failed error, not the
1742                          * share error. We can't open the file due to kernel
1743                          * oplock deadlock (it's possible we failed above on
1744                          * the open_mode_check()) so use a userspace check.
1745                          */
1746
1747                         if (flags & O_RDWR) {
1748                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1749                         } else if (flags & O_WRONLY) {
1750                                 can_access_mask = FILE_WRITE_DATA;
1751                         } else {
1752                                 can_access_mask = FILE_READ_DATA;
1753                         }
1754
1755                         if (((can_access_mask & FILE_WRITE_DATA) &&
1756                                 !CAN_WRITE(conn)) ||
1757                             !can_access_file_data(conn, smb_fname,
1758                                                   can_access_mask)) {
1759                                 can_access = False;
1760                         }
1761
1762                         /*
1763                          * If we're returning a share violation, ensure we
1764                          * cope with the braindead 1 second delay.
1765                          */
1766
1767                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1768                             lp_defer_sharing_violations()) {
1769                                 struct timeval timeout;
1770                                 struct deferred_open_record state;
1771                                 int timeout_usecs;
1772
1773                                 /* this is a hack to speed up torture tests
1774                                    in 'make test' */
1775                                 timeout_usecs = lp_parm_int(SNUM(conn),
1776                                                             "smbd","sharedelay",
1777                                                             SHARING_VIOLATION_USEC_WAIT);
1778
1779                                 /* This is a relative time, added to the absolute
1780                                    request_time value to get the absolute timeout time.
1781                                    Note that if this is the second or greater time we enter
1782                                    this codepath for this particular request mid then
1783                                    request_time is left as the absolute time of the *first*
1784                                    time this request mid was processed. This is what allows
1785                                    the request to eventually time out. */
1786
1787                                 timeout = timeval_set(0, timeout_usecs);
1788
1789                                 /* Nothing actually uses state.delayed_for_oplocks
1790                                    but it's handy to differentiate in debug messages
1791                                    between a 30 second delay due to oplock break, and
1792                                    a 1 second delay for share mode conflicts. */
1793
1794                                 state.delayed_for_oplocks = False;
1795                                 state.id = id;
1796
1797                                 if ((req != NULL)
1798                                     && !request_timed_out(request_time,
1799                                                           timeout)) {
1800                                         defer_open(lck, request_time, timeout,
1801                                                    req, &state);
1802                                 }
1803                         }
1804
1805                         TALLOC_FREE(lck);
1806                         if (can_access) {
1807                                 /*
1808                                  * We have detected a sharing violation here
1809                                  * so return the correct error code
1810                                  */
1811                                 status = NT_STATUS_SHARING_VIOLATION;
1812                         } else {
1813                                 status = NT_STATUS_ACCESS_DENIED;
1814                         }
1815                         return status;
1816                 }
1817
1818                 /*
1819                  * We exit this block with the share entry *locked*.....
1820                  */
1821         }
1822
1823         SMB_ASSERT(!file_existed || (lck != NULL));
1824
1825         /*
1826          * Ensure we pay attention to default ACLs on directories if required.
1827          */
1828
1829         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1830             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1831                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
1832         }
1833
1834         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1835                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1836                  (unsigned int)flags, (unsigned int)flags2,
1837                  (unsigned int)unx_mode, (unsigned int)access_mask,
1838                  (unsigned int)open_access_mask));
1839
1840         /*
1841          * open_file strips any O_TRUNC flags itself.
1842          */
1843
1844         fsp_open = open_file(fsp, conn, req, parent_dir,
1845                              flags|flags2, unx_mode, access_mask,
1846                              open_access_mask);
1847
1848         if (!NT_STATUS_IS_OK(fsp_open)) {
1849                 if (lck != NULL) {
1850                         TALLOC_FREE(lck);
1851                 }
1852                 return fsp_open;
1853         }
1854
1855         if (!file_existed) {
1856                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1857                 /*
1858                  * Deal with the race condition where two smbd's detect the
1859                  * file doesn't exist and do the create at the same time. One
1860                  * of them will win and set a share mode, the other (ie. this
1861                  * one) should check if the requested share mode for this
1862                  * create is allowed.
1863                  */
1864
1865                 /*
1866                  * Now the file exists and fsp is successfully opened,
1867                  * fsp->dev and fsp->inode are valid and should replace the
1868                  * dev=0,inode=0 from a non existent file. Spotted by
1869                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1870                  */
1871
1872                 id = fsp->file_id;
1873
1874                 lck = get_share_mode_lock(talloc_tos(), id,
1875                                           conn->connectpath,
1876                                           smb_fname, &old_write_time);
1877
1878                 if (lck == NULL) {
1879                         DEBUG(0, ("open_file_ntcreate: Could not get share "
1880                                   "mode lock for %s\n",
1881                                   smb_fname_str_dbg(smb_fname)));
1882                         fd_close(fsp);
1883                         return NT_STATUS_SHARING_VIOLATION;
1884                 }
1885
1886                 /* First pass - send break only on batch oplocks. */
1887                 if ((req != NULL)
1888                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1889                                          oplock_request)) {
1890                         schedule_defer_open(lck, request_time, req);
1891                         TALLOC_FREE(lck);
1892                         fd_close(fsp);
1893                         return NT_STATUS_SHARING_VIOLATION;
1894                 }
1895
1896                 status = open_mode_check(conn, lck, access_mask, share_access,
1897                                          create_options, &file_existed);
1898
1899                 if (NT_STATUS_IS_OK(status)) {
1900                         /* We might be going to allow this open. Check oplock
1901                          * status again. */
1902                         /* Second pass - send break for both batch or
1903                          * exclusive oplocks. */
1904                         if ((req != NULL)
1905                             && delay_for_oplocks(lck, fsp, req->mid, 2,
1906                                                  oplock_request)) {
1907                                 schedule_defer_open(lck, request_time, req);
1908                                 TALLOC_FREE(lck);
1909                                 fd_close(fsp);
1910                                 return NT_STATUS_SHARING_VIOLATION;
1911                         }
1912                 }
1913
1914                 if (!NT_STATUS_IS_OK(status)) {
1915                         struct deferred_open_record state;
1916
1917                         fd_close(fsp);
1918
1919                         state.delayed_for_oplocks = False;
1920                         state.id = id;
1921
1922                         /* Do it all over again immediately. In the second
1923                          * round we will find that the file existed and handle
1924                          * the DELETE_PENDING and FCB cases correctly. No need
1925                          * to duplicate the code here. Essentially this is a
1926                          * "goto top of this function", but don't tell
1927                          * anybody... */
1928
1929                         if (req != NULL) {
1930                                 defer_open(lck, request_time, timeval_zero(),
1931                                            req, &state);
1932                         }
1933                         TALLOC_FREE(lck);
1934                         return status;
1935                 }
1936
1937                 /*
1938                  * We exit this block with the share entry *locked*.....
1939                  */
1940
1941         }
1942
1943         SMB_ASSERT(lck != NULL);
1944
1945         /* Delete streams if create_disposition requires it */
1946         if (file_existed && clear_ads &&
1947             !is_ntfs_stream_smb_fname(smb_fname)) {
1948                 status = delete_all_streams(conn, smb_fname->base_name);
1949                 if (!NT_STATUS_IS_OK(status)) {
1950                         TALLOC_FREE(lck);
1951                         fd_close(fsp);
1952                         return status;
1953                 }
1954         }
1955
1956         /* note that we ignore failure for the following. It is
1957            basically a hack for NFS, and NFS will never set one of
1958            these only read them. Nobody but Samba can ever set a deny
1959            mode and we have already checked our more authoritative
1960            locking database for permission to set this deny mode. If
1961            the kernel refuses the operations then the kernel is wrong.
1962            note that GPFS supports it as well - jmcd */
1963
1964         if (fsp->fh->fd != -1) {
1965                 int ret_flock;
1966                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
1967                 if(ret_flock == -1 ){
1968
1969                         TALLOC_FREE(lck);
1970                         fd_close(fsp);
1971
1972                         return NT_STATUS_SHARING_VIOLATION;
1973                 }
1974         }
1975
1976         /*
1977          * At this point onwards, we can guarentee that the share entry
1978          * is locked, whether we created the file or not, and that the
1979          * deny mode is compatible with all current opens.
1980          */
1981
1982         /*
1983          * If requested, truncate the file.
1984          */
1985
1986         if (flags2&O_TRUNC) {
1987                 /*
1988                  * We are modifing the file after open - update the stat
1989                  * struct..
1990                  */
1991                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1992                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
1993                         status = map_nt_error_from_unix(errno);
1994                         TALLOC_FREE(lck);
1995                         fd_close(fsp);
1996                         return status;
1997                 }
1998         }
1999
2000         /* Record the options we were opened with. */
2001         fsp->share_access = share_access;
2002         fsp->fh->private_options = create_options;
2003         /*
2004          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2005          */
2006         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2007
2008         if (file_existed) {
2009                 /* stat opens on existing files don't get oplocks. */
2010                 if (is_stat_open(open_access_mask)) {
2011                         fsp->oplock_type = NO_OPLOCK;
2012                 }
2013
2014                 if (!(flags2 & O_TRUNC)) {
2015                         info = FILE_WAS_OPENED;
2016                 } else {
2017                         info = FILE_WAS_OVERWRITTEN;
2018                 }
2019         } else {
2020                 info = FILE_WAS_CREATED;
2021         }
2022
2023         if (pinfo) {
2024                 *pinfo = info;
2025         }
2026
2027         /*
2028          * Setup the oplock info in both the shared memory and
2029          * file structs.
2030          */
2031
2032         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2033                 /* Could not get the kernel oplock */
2034                 fsp->oplock_type = NO_OPLOCK;
2035         }
2036
2037         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2038                 new_file_created = True;
2039         }
2040
2041         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
2042                        fsp->oplock_type);
2043
2044         /* Handle strange delete on close create semantics. */
2045         if (create_options & FILE_DELETE_ON_CLOSE) {
2046
2047                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2048
2049                 if (!NT_STATUS_IS_OK(status)) {
2050                         /* Remember to delete the mode we just added. */
2051                         del_share_mode(lck, fsp);
2052                         TALLOC_FREE(lck);
2053                         fd_close(fsp);
2054                         return status;
2055                 }
2056                 /* Note that here we set the *inital* delete on close flag,
2057                    not the regular one. The magic gets handled in close. */
2058                 fsp->initial_delete_on_close = True;
2059         }
2060
2061         if (new_file_created) {
2062                 /* Files should be initially set as archive */
2063                 if (lp_map_archive(SNUM(conn)) ||
2064                     lp_store_dos_attributes(SNUM(conn))) {
2065                         if (!posix_open) {
2066                                 if (file_set_dosmode(conn, smb_fname,
2067                                             new_dos_attributes | aARCH,
2068                                             parent_dir, true) == 0) {
2069                                         unx_mode = smb_fname->st.st_ex_mode;
2070                                 }
2071                         }
2072                 }
2073         }
2074
2075         /*
2076          * Take care of inherited ACLs on created files - if default ACL not
2077          * selected.
2078          */
2079
2080         if (!posix_open && !file_existed && !def_acl) {
2081
2082                 int saved_errno = errno; /* We might get ENOSYS in the next
2083                                           * call.. */
2084
2085                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2086                     errno == ENOSYS) {
2087                         errno = saved_errno; /* Ignore ENOSYS */
2088                 }
2089
2090         } else if (new_unx_mode) {
2091
2092                 int ret = -1;
2093
2094                 /* Attributes need changing. File already existed. */
2095
2096                 {
2097                         int saved_errno = errno; /* We might get ENOSYS in the
2098                                                   * next call.. */
2099                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2100
2101                         if (ret == -1 && errno == ENOSYS) {
2102                                 errno = saved_errno; /* Ignore ENOSYS */
2103                         } else {
2104                                 DEBUG(5, ("open_file_ntcreate: reset "
2105                                           "attributes of file %s to 0%o\n",
2106                                           smb_fname_str_dbg(smb_fname),
2107                                           (unsigned int)new_unx_mode));
2108                                 ret = 0; /* Don't do the fchmod below. */
2109                         }
2110                 }
2111
2112                 if ((ret == -1) &&
2113                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2114                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2115                                   "attributes of file %s to 0%o\n",
2116                                   smb_fname_str_dbg(smb_fname),
2117                                   (unsigned int)new_unx_mode));
2118         }
2119
2120         /* If this is a successful open, we must remove any deferred open
2121          * records. */
2122         if (req != NULL) {
2123                 del_deferred_open_entry(lck, req->mid);
2124         }
2125         TALLOC_FREE(lck);
2126
2127         return NT_STATUS_OK;
2128 }
2129
2130
2131 /****************************************************************************
2132  Open a file for for write to ensure that we can fchmod it.
2133 ****************************************************************************/
2134
2135 NTSTATUS open_file_fchmod(connection_struct *conn,
2136                           struct smb_filename *smb_fname,
2137                           files_struct **result)
2138 {
2139         if (!VALID_STAT(smb_fname->st)) {
2140                 return NT_STATUS_INVALID_PARAMETER;
2141         }
2142
2143         return SMB_VFS_CREATE_FILE(
2144                 conn,                                   /* conn */
2145                 NULL,                                   /* req */
2146                 0,                                      /* root_dir_fid */
2147                 smb_fname,                              /* fname */
2148                 FILE_WRITE_DATA,                        /* access_mask */
2149                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2150                     FILE_SHARE_DELETE),
2151                 FILE_OPEN,                              /* create_disposition*/
2152                 0,                                      /* create_options */
2153                 0,                                      /* file_attributes */
2154                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2155                 0,                                      /* allocation_size */
2156                 NULL,                                   /* sd */
2157                 NULL,                                   /* ea_list */
2158                 result,                                 /* result */
2159                 NULL);                                  /* pinfo */
2160 }
2161
2162 static NTSTATUS mkdir_internal(connection_struct *conn,
2163                                struct smb_filename *smb_dname,
2164                                uint32 file_attributes)
2165 {
2166         mode_t mode;
2167         char *parent_dir;
2168         NTSTATUS status;
2169         bool posix_open = false;
2170         bool need_re_stat = false;
2171
2172         if(!CAN_WRITE(conn)) {
2173                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2174                          "%s\n", lp_servicename(SNUM(conn))));
2175                 return NT_STATUS_ACCESS_DENIED;
2176         }
2177
2178         status = check_name(conn, smb_dname->base_name);
2179         if (!NT_STATUS_IS_OK(status)) {
2180                 return status;
2181         }
2182
2183         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2184                             NULL)) {
2185                 return NT_STATUS_NO_MEMORY;
2186         }
2187
2188         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2189                 posix_open = true;
2190                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2191         } else {
2192                 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2193         }
2194
2195         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2196                 return map_nt_error_from_unix(errno);
2197         }
2198
2199         /* Ensure we're checking for a symlink here.... */
2200         /* We don't want to get caught by a symlink racer. */
2201
2202         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2203                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2204                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2205                 return map_nt_error_from_unix(errno);
2206         }
2207
2208         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2209                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2210                           smb_fname_str_dbg(smb_dname)));
2211                 return NT_STATUS_ACCESS_DENIED;
2212         }
2213
2214         if (lp_store_dos_attributes(SNUM(conn))) {
2215                 if (!posix_open) {
2216                         file_set_dosmode(conn, smb_dname,
2217                                          file_attributes | aDIR,
2218                                          parent_dir, true);
2219                 }
2220         }
2221
2222         if (lp_inherit_perms(SNUM(conn))) {
2223                 inherit_access_posix_acl(conn, parent_dir,
2224                                          smb_dname->base_name, mode);
2225                 need_re_stat = true;
2226         }
2227
2228         if (!posix_open) {
2229                 /*
2230                  * Check if high bits should have been set,
2231                  * then (if bits are missing): add them.
2232                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2233                  * dir.
2234                  */
2235                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2236                     (mode & ~smb_dname->st.st_ex_mode)) {
2237                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2238                                       (smb_dname->st.st_ex_mode |
2239                                           (mode & ~smb_dname->st.st_ex_mode)));
2240                         need_re_stat = true;
2241                 }
2242         }
2243
2244         /* Change the owner if required. */
2245         if (lp_inherit_owner(SNUM(conn))) {
2246                 change_dir_owner_to_parent(conn, parent_dir,
2247                                            smb_dname->base_name,
2248                                            &smb_dname->st);
2249                 need_re_stat = true;
2250         }
2251
2252         if (need_re_stat) {
2253                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2254                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2255                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2256                         return map_nt_error_from_unix(errno);
2257                 }
2258         }
2259
2260         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2261                      smb_dname->base_name);
2262
2263         return NT_STATUS_OK;
2264 }
2265
2266 /****************************************************************************
2267  Open a directory from an NT SMB call.
2268 ****************************************************************************/
2269
2270 static NTSTATUS open_directory(connection_struct *conn,
2271                                struct smb_request *req,
2272                                struct smb_filename *smb_dname,
2273                                uint32 access_mask,
2274                                uint32 share_access,
2275                                uint32 create_disposition,
2276                                uint32 create_options,
2277                                uint32 file_attributes,
2278                                int *pinfo,
2279                                files_struct **result)
2280 {
2281         files_struct *fsp = NULL;
2282         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2283         struct share_mode_lock *lck = NULL;
2284         NTSTATUS status;
2285         struct timespec mtimespec;
2286         int info = 0;
2287
2288         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2289
2290         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2291                 /* Ensure we have a directory attribute. */
2292                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2293         }
2294
2295         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2296                  "share_access = 0x%x create_options = 0x%x, "
2297                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2298                  smb_fname_str_dbg(smb_dname),
2299                  (unsigned int)access_mask,
2300                  (unsigned int)share_access,
2301                  (unsigned int)create_options,
2302                  (unsigned int)create_disposition,
2303                  (unsigned int)file_attributes));
2304
2305         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2306                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2307                         is_ntfs_stream_smb_fname(smb_dname)) {
2308                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2309                           smb_fname_str_dbg(smb_dname)));
2310                 return NT_STATUS_NOT_A_DIRECTORY;
2311         }
2312
2313         status = calculate_access_mask(conn, smb_dname, dir_existed,
2314                                        access_mask, &access_mask);
2315         if (!NT_STATUS_IS_OK(status)) {
2316                 DEBUG(10, ("open_directory: calculate_access_mask "
2317                         "on file %s returned %s\n",
2318                         smb_fname_str_dbg(smb_dname),
2319                         nt_errstr(status)));
2320                 return status;
2321         }
2322
2323         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2324                         !user_has_privileges(current_user.nt_user_token, &se_security)) {
2325                 DEBUG(10, ("open_directory: open on %s "
2326                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2327                         smb_fname_str_dbg(smb_dname)));
2328                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2329         }
2330
2331         switch( create_disposition ) {
2332                 case FILE_OPEN:
2333
2334                         info = FILE_WAS_OPENED;
2335
2336                         /*
2337                          * We want to follow symlinks here.
2338                          */
2339
2340                         if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2341                                 return map_nt_error_from_unix(errno);
2342                         }
2343
2344                         break;
2345
2346                 case FILE_CREATE:
2347
2348                         /* If directory exists error. If directory doesn't
2349                          * exist create. */
2350
2351                         status = mkdir_internal(conn, smb_dname,
2352                                                 file_attributes);
2353
2354                         if (!NT_STATUS_IS_OK(status)) {
2355                                 DEBUG(2, ("open_directory: unable to create "
2356                                           "%s. Error was %s\n",
2357                                           smb_fname_str_dbg(smb_dname),
2358                                           nt_errstr(status)));
2359                                 return status;
2360                         }
2361
2362                         info = FILE_WAS_CREATED;
2363                         break;
2364
2365                 case FILE_OPEN_IF:
2366                         /*
2367                          * If directory exists open. If directory doesn't
2368                          * exist create.
2369                          */
2370
2371                         status = mkdir_internal(conn, smb_dname,
2372                                                 file_attributes);
2373
2374                         if (NT_STATUS_IS_OK(status)) {
2375                                 info = FILE_WAS_CREATED;
2376                         }
2377
2378                         if (NT_STATUS_EQUAL(status,
2379                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2380                                 info = FILE_WAS_OPENED;
2381                                 status = NT_STATUS_OK;
2382                         }
2383
2384                         break;
2385
2386                 case FILE_SUPERSEDE:
2387                 case FILE_OVERWRITE:
2388                 case FILE_OVERWRITE_IF:
2389                 default:
2390                         DEBUG(5,("open_directory: invalid create_disposition "
2391                                  "0x%x for directory %s\n",
2392                                  (unsigned int)create_disposition,
2393                                  smb_fname_str_dbg(smb_dname)));
2394                         return NT_STATUS_INVALID_PARAMETER;
2395         }
2396
2397         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2398                 DEBUG(5,("open_directory: %s is not a directory !\n",
2399                          smb_fname_str_dbg(smb_dname)));
2400                 return NT_STATUS_NOT_A_DIRECTORY;
2401         }
2402
2403         if (info == FILE_WAS_OPENED) {
2404                 uint32_t access_granted = 0;
2405                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2406                                                 &access_granted);
2407
2408                 /* Were we trying to do a directory open
2409                  * for delete and didn't get DELETE
2410                  * access (only) ? Check if the
2411                  * directory allows DELETE_CHILD.
2412                  * See here:
2413                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2414                  * for details. */
2415
2416                 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2417                         (access_mask & DELETE_ACCESS) &&
2418                         (access_granted == DELETE_ACCESS) &&
2419                         can_delete_file_in_directory(conn, smb_dname))) {
2420                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2421                                 "on directory %s\n",
2422                                 smb_fname_str_dbg(smb_dname)));
2423                         status = NT_STATUS_OK;
2424                 }
2425
2426                 if (!NT_STATUS_IS_OK(status)) {
2427                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2428                                 "file %s failed with %s\n",
2429                                 smb_fname_str_dbg(smb_dname),
2430                                 nt_errstr(status)));
2431                         return status;
2432                 }
2433         }
2434
2435         status = file_new(req, conn, &fsp);
2436         if(!NT_STATUS_IS_OK(status)) {
2437                 return status;
2438         }
2439
2440         /*
2441          * Setup the files_struct for it.
2442          */
2443
2444         fsp->mode = smb_dname->st.st_ex_mode;
2445         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2446         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2447         fsp->file_pid = req ? req->smbpid : 0;
2448         fsp->can_lock = False;
2449         fsp->can_read = False;
2450         fsp->can_write = False;
2451
2452         fsp->share_access = share_access;
2453         fsp->fh->private_options = create_options;
2454         /*
2455          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2456          */
2457         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2458         fsp->print_file = False;
2459         fsp->modified = False;
2460         fsp->oplock_type = NO_OPLOCK;
2461         fsp->sent_oplock_break = NO_BREAK_SENT;
2462         fsp->is_directory = True;
2463         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2464         status = fsp_set_smb_fname(fsp, smb_dname);
2465         if (!NT_STATUS_IS_OK(status)) {
2466                 return status;
2467         }
2468
2469         mtimespec = smb_dname->st.st_ex_mtime;
2470
2471         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2472                                   conn->connectpath, smb_dname, &mtimespec);
2473
2474         if (lck == NULL) {
2475                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2476                           "%s\n", smb_fname_str_dbg(smb_dname)));
2477                 file_free(req, fsp);
2478                 return NT_STATUS_SHARING_VIOLATION;
2479         }
2480
2481         status = open_mode_check(conn, lck, access_mask, share_access,
2482                                  create_options, &dir_existed);
2483
2484         if (!NT_STATUS_IS_OK(status)) {
2485                 TALLOC_FREE(lck);
2486                 file_free(req, fsp);
2487                 return status;
2488         }
2489
2490         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK);
2491
2492         /* For directories the delete on close bit at open time seems
2493            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2494         if (create_options & FILE_DELETE_ON_CLOSE) {
2495                 status = can_set_delete_on_close(fsp, 0);
2496                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2497                         TALLOC_FREE(lck);
2498                         file_free(req, fsp);
2499                         return status;
2500                 }
2501
2502                 if (NT_STATUS_IS_OK(status)) {
2503                         /* Note that here we set the *inital* delete on close flag,
2504                            not the regular one. The magic gets handled in close. */
2505                         fsp->initial_delete_on_close = True;
2506                 }
2507         }
2508
2509         TALLOC_FREE(lck);
2510
2511         if (pinfo) {
2512                 *pinfo = info;
2513         }
2514
2515         *result = fsp;
2516         return NT_STATUS_OK;
2517 }
2518
2519 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2520                           struct smb_filename *smb_dname)
2521 {
2522         NTSTATUS status;
2523         files_struct *fsp;
2524
2525         status = SMB_VFS_CREATE_FILE(
2526                 conn,                                   /* conn */
2527                 req,                                    /* req */
2528                 0,                                      /* root_dir_fid */
2529                 smb_dname,                              /* fname */
2530                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2531                 FILE_SHARE_NONE,                        /* share_access */
2532                 FILE_CREATE,                            /* create_disposition*/
2533                 FILE_DIRECTORY_FILE,                    /* create_options */
2534                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2535                 0,                                      /* oplock_request */
2536                 0,                                      /* allocation_size */
2537                 NULL,                                   /* sd */
2538                 NULL,                                   /* ea_list */
2539                 &fsp,                                   /* result */
2540                 NULL);                                  /* pinfo */
2541
2542         if (NT_STATUS_IS_OK(status)) {
2543                 close_file(req, fsp, NORMAL_CLOSE);
2544         }
2545
2546         return status;
2547 }
2548
2549 /****************************************************************************
2550  Receive notification that one of our open files has been renamed by another
2551  smbd process.
2552 ****************************************************************************/
2553
2554 void msg_file_was_renamed(struct messaging_context *msg,
2555                           void *private_data,
2556                           uint32_t msg_type,
2557                           struct server_id server_id,
2558                           DATA_BLOB *data)
2559 {
2560         files_struct *fsp;
2561         char *frm = (char *)data->data;
2562         struct file_id id;
2563         const char *sharepath;
2564         const char *base_name;
2565         const char *stream_name;
2566         struct smb_filename *smb_fname = NULL;
2567         size_t sp_len, bn_len;
2568         NTSTATUS status;
2569
2570         if (data->data == NULL
2571             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2572                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2573                           (int)data->length));
2574                 return;
2575         }
2576
2577         /* Unpack the message. */
2578         pull_file_id_24(frm, &id);
2579         sharepath = &frm[24];
2580         sp_len = strlen(sharepath);
2581         base_name = sharepath + sp_len + 1;
2582         bn_len = strlen(base_name);
2583         stream_name = sharepath + sp_len + 1 + bn_len + 1;
2584
2585         /* stream_name must always be NULL if there is no stream. */
2586         if (stream_name[0] == '\0') {
2587                 stream_name = NULL;
2588         }
2589
2590         status = create_synthetic_smb_fname(talloc_tos(), base_name,
2591                                             stream_name, NULL, &smb_fname);
2592         if (!NT_STATUS_IS_OK(status)) {
2593                 return;
2594         }
2595
2596         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2597                 "file_id %s\n",
2598                 sharepath, smb_fname_str_dbg(smb_fname),
2599                 file_id_string_tos(&id)));
2600
2601         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2602                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2603
2604                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2605                                 fsp->fnum, fsp_str_dbg(fsp),
2606                                 smb_fname_str_dbg(smb_fname)));
2607                         status = fsp_set_smb_fname(fsp, smb_fname);
2608                         if (!NT_STATUS_IS_OK(status)) {
2609                                 goto out;
2610                         }
2611                 } else {
2612                         /* TODO. JRA. */
2613                         /* Now we have the complete path we can work out if this is
2614                            actually within this share and adjust newname accordingly. */
2615                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2616                                 "not sharepath %s) "
2617                                 "fnum %d from %s -> %s\n",
2618                                 fsp->conn->connectpath,
2619                                 sharepath,
2620                                 fsp->fnum,
2621                                 fsp_str_dbg(fsp),
2622                                 smb_fname_str_dbg(smb_fname)));
2623                 }
2624         }
2625  out:
2626         TALLOC_FREE(smb_fname);
2627         return;
2628 }
2629
2630 /*
2631  * If a main file is opened for delete, all streams need to be checked for
2632  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2633  * If that works, delete them all by setting the delete on close and close.
2634  */
2635
2636 NTSTATUS open_streams_for_delete(connection_struct *conn,
2637                                         const char *fname)
2638 {
2639         struct stream_struct *stream_info;
2640         files_struct **streams;
2641         int i;
2642         unsigned int num_streams;
2643         TALLOC_CTX *frame = talloc_stackframe();
2644         NTSTATUS status;
2645
2646         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2647                                     &num_streams, &stream_info);
2648
2649         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2650             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2651                 DEBUG(10, ("no streams around\n"));
2652                 TALLOC_FREE(frame);
2653                 return NT_STATUS_OK;
2654         }
2655
2656         if (!NT_STATUS_IS_OK(status)) {
2657                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2658                            nt_errstr(status)));
2659                 goto fail;
2660         }
2661
2662         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2663                    num_streams));
2664
2665         if (num_streams == 0) {
2666                 TALLOC_FREE(frame);
2667                 return NT_STATUS_OK;
2668         }
2669
2670         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2671         if (streams == NULL) {
2672                 DEBUG(0, ("talloc failed\n"));
2673                 status = NT_STATUS_NO_MEMORY;
2674                 goto fail;
2675         }
2676
2677         for (i=0; i<num_streams; i++) {
2678                 struct smb_filename *smb_fname = NULL;
2679
2680                 if (strequal(stream_info[i].name, "::$DATA")) {
2681                         streams[i] = NULL;
2682                         continue;
2683                 }
2684
2685                 status = create_synthetic_smb_fname(talloc_tos(), fname,
2686                                                     stream_info[i].name,
2687                                                     NULL, &smb_fname);
2688                 if (!NT_STATUS_IS_OK(status)) {
2689                         goto fail;
2690                 }
2691
2692                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2693                         DEBUG(10, ("Unable to stat stream: %s\n",
2694                                    smb_fname_str_dbg(smb_fname)));
2695                 }
2696
2697                 status = SMB_VFS_CREATE_FILE(
2698                          conn,                  /* conn */
2699                          NULL,                  /* req */
2700                          0,                     /* root_dir_fid */
2701                          smb_fname,             /* fname */
2702                          DELETE_ACCESS,         /* access_mask */
2703                          (FILE_SHARE_READ |     /* share_access */
2704                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2705                          FILE_OPEN,             /* create_disposition*/
2706                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2707                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2708                          0,                     /* oplock_request */
2709                          0,                     /* allocation_size */
2710                          NULL,                  /* sd */
2711                          NULL,                  /* ea_list */
2712                          &streams[i],           /* result */
2713                          NULL);                 /* pinfo */
2714
2715                 if (!NT_STATUS_IS_OK(status)) {
2716                         DEBUG(10, ("Could not open stream %s: %s\n",
2717                                    smb_fname_str_dbg(smb_fname),
2718                                    nt_errstr(status)));
2719
2720                         TALLOC_FREE(smb_fname);
2721                         break;
2722                 }
2723                 TALLOC_FREE(smb_fname);
2724         }
2725
2726         /*
2727          * don't touch the variable "status" beyond this point :-)
2728          */
2729
2730         for (i -= 1 ; i >= 0; i--) {
2731                 if (streams[i] == NULL) {
2732                         continue;
2733                 }
2734
2735                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2736                            fsp_str_dbg(streams[i])));
2737                 close_file(NULL, streams[i], NORMAL_CLOSE);
2738         }
2739
2740  fail:
2741         TALLOC_FREE(frame);
2742         return status;
2743 }
2744
2745 /*
2746  * Wrapper around open_file_ntcreate and open_directory
2747  */
2748
2749 static NTSTATUS create_file_unixpath(connection_struct *conn,
2750                                      struct smb_request *req,
2751                                      struct smb_filename *smb_fname,
2752                                      uint32_t access_mask,
2753                                      uint32_t share_access,
2754                                      uint32_t create_disposition,
2755                                      uint32_t create_options,
2756                                      uint32_t file_attributes,
2757                                      uint32_t oplock_request,
2758                                      uint64_t allocation_size,
2759                                      struct security_descriptor *sd,
2760                                      struct ea_list *ea_list,
2761
2762                                      files_struct **result,
2763                                      int *pinfo)
2764 {
2765         int info = FILE_WAS_OPENED;
2766         files_struct *base_fsp = NULL;
2767         files_struct *fsp = NULL;
2768         NTSTATUS status;
2769
2770         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2771                   "file_attributes = 0x%x, share_access = 0x%x, "
2772                   "create_disposition = 0x%x create_options = 0x%x "
2773                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2774                   "fname = %s\n",
2775                   (unsigned int)access_mask,
2776                   (unsigned int)file_attributes,
2777                   (unsigned int)share_access,
2778                   (unsigned int)create_disposition,
2779                   (unsigned int)create_options,
2780                   (unsigned int)oplock_request,
2781                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
2782
2783         if (create_options & FILE_OPEN_BY_FILE_ID) {
2784                 status = NT_STATUS_NOT_SUPPORTED;
2785                 goto fail;
2786         }
2787
2788         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2789                 status = NT_STATUS_INVALID_PARAMETER;
2790                 goto fail;
2791         }
2792
2793         if (req == NULL) {
2794                 oplock_request |= INTERNAL_OPEN_ONLY;
2795         }
2796
2797         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2798             && (access_mask & DELETE_ACCESS)
2799             && !is_ntfs_stream_smb_fname(smb_fname)) {
2800                 /*
2801                  * We can't open a file with DELETE access if any of the
2802                  * streams is open without FILE_SHARE_DELETE
2803                  */
2804                 status = open_streams_for_delete(conn, smb_fname->base_name);
2805
2806                 if (!NT_STATUS_IS_OK(status)) {
2807                         goto fail;
2808                 }
2809         }
2810
2811         /* This is the correct thing to do (check every time) but can_delete
2812          * is expensive (it may have to read the parent directory
2813          * permissions). So for now we're not doing it unless we have a strong
2814          * hint the client is really going to delete this file. If the client
2815          * is forcing FILE_CREATE let the filesystem take care of the
2816          * permissions. */
2817
2818         /* Setting FILE_SHARE_DELETE is the hint. */
2819
2820         if ((create_disposition != FILE_CREATE)
2821             && (access_mask & DELETE_ACCESS)
2822             && (!(can_delete_file_in_directory(conn, smb_fname) ||
2823                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
2824                 status = NT_STATUS_ACCESS_DENIED;
2825                 DEBUG(10,("create_file_unixpath: open file %s "
2826                           "for delete ACCESS_DENIED\n",
2827                           smb_fname_str_dbg(smb_fname)));
2828                 goto fail;
2829         }
2830
2831         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2832                         !user_has_privileges(current_user.nt_user_token, &se_security)) {
2833                 DEBUG(10, ("create_file_unixpath:: open on %s "
2834                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2835                         smb_fname_str_dbg(smb_fname)));
2836                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2837                 goto fail;
2838         }
2839
2840         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2841             && is_ntfs_stream_smb_fname(smb_fname)
2842             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2843                 uint32 base_create_disposition;
2844                 struct smb_filename *smb_fname_base = NULL;
2845
2846                 if (create_options & FILE_DIRECTORY_FILE) {
2847                         status = NT_STATUS_NOT_A_DIRECTORY;
2848                         goto fail;
2849                 }
2850
2851                 switch (create_disposition) {
2852                 case FILE_OPEN:
2853                         base_create_disposition = FILE_OPEN;
2854                         break;
2855                 default:
2856                         base_create_disposition = FILE_OPEN_IF;
2857                         break;
2858                 }
2859
2860                 /* Create an smb_filename with stream_name == NULL. */
2861                 status = create_synthetic_smb_fname(talloc_tos(),
2862                                                     smb_fname->base_name,
2863                                                     NULL, NULL,
2864                                                     &smb_fname_base);
2865                 if (!NT_STATUS_IS_OK(status)) {
2866                         goto fail;
2867                 }
2868
2869                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
2870                         DEBUG(10, ("Unable to stat stream: %s\n",
2871                                    smb_fname_str_dbg(smb_fname_base)));
2872                 }
2873
2874                 /* Open the base file. */
2875                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
2876                                               FILE_SHARE_READ
2877                                               | FILE_SHARE_WRITE
2878                                               | FILE_SHARE_DELETE,
2879                                               base_create_disposition,
2880                                               0, 0, 0, 0, NULL, NULL,
2881                                               &base_fsp, NULL);
2882                 TALLOC_FREE(smb_fname_base);
2883
2884                 if (!NT_STATUS_IS_OK(status)) {
2885                         DEBUG(10, ("create_file_unixpath for base %s failed: "
2886                                    "%s\n", smb_fname->base_name,
2887                                    nt_errstr(status)));
2888                         goto fail;
2889                 }
2890                 /* we don't need to low level fd */
2891                 fd_close(base_fsp);
2892         }
2893
2894         /*
2895          * If it's a request for a directory open, deal with it separately.
2896          */
2897
2898         if (create_options & FILE_DIRECTORY_FILE) {
2899
2900                 if (create_options & FILE_NON_DIRECTORY_FILE) {
2901                         status = NT_STATUS_INVALID_PARAMETER;
2902                         goto fail;
2903                 }
2904
2905                 /* Can't open a temp directory. IFS kit test. */
2906                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2907                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
2908                         status = NT_STATUS_INVALID_PARAMETER;
2909                         goto fail;
2910                 }
2911
2912                 /*
2913                  * We will get a create directory here if the Win32
2914                  * app specified a security descriptor in the
2915                  * CreateDirectory() call.
2916                  */
2917
2918                 oplock_request = 0;
2919                 status = open_directory(
2920                         conn, req, smb_fname, access_mask, share_access,
2921                         create_disposition, create_options, file_attributes,
2922                         &info, &fsp);
2923         } else {
2924
2925                 /*
2926                  * Ordinary file case.
2927                  */
2928
2929                 status = file_new(req, conn, &fsp);
2930                 if(!NT_STATUS_IS_OK(status)) {
2931                         goto fail;
2932                 }
2933
2934                 status = fsp_set_smb_fname(fsp, smb_fname);
2935                 if (!NT_STATUS_IS_OK(status)) {
2936                         goto fail;
2937                 }
2938
2939                 /*
2940                  * We're opening the stream element of a base_fsp
2941                  * we already opened. Set up the base_fsp pointer.
2942                  */
2943                 if (base_fsp) {
2944                         fsp->base_fsp = base_fsp;
2945                 }
2946
2947                 status = open_file_ntcreate(conn,
2948                                             req,
2949                                             access_mask,
2950                                             share_access,
2951                                             create_disposition,
2952                                             create_options,
2953                                             file_attributes,
2954                                             oplock_request,
2955                                             &info,
2956                                             fsp);
2957
2958                 if(!NT_STATUS_IS_OK(status)) {
2959                         file_free(req, fsp);
2960                         fsp = NULL;
2961                 }
2962
2963                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2964
2965                         /* A stream open never opens a directory */
2966
2967                         if (base_fsp) {
2968                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2969                                 goto fail;
2970                         }
2971
2972                         /*
2973                          * Fail the open if it was explicitly a non-directory
2974                          * file.
2975                          */
2976
2977                         if (create_options & FILE_NON_DIRECTORY_FILE) {
2978                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2979                                 goto fail;
2980                         }
2981
2982                         oplock_request = 0;
2983                         status = open_directory(
2984                                 conn, req, smb_fname, access_mask,
2985                                 share_access, create_disposition,
2986                                 create_options, file_attributes,
2987                                 &info, &fsp);
2988                 }
2989         }
2990
2991         if (!NT_STATUS_IS_OK(status)) {
2992                 goto fail;
2993         }
2994
2995         fsp->base_fsp = base_fsp;
2996
2997         /*
2998          * According to the MS documentation, the only time the security
2999          * descriptor is applied to the opened file is iff we *created* the
3000          * file; an existing file stays the same.
3001          *
3002          * Also, it seems (from observation) that you can open the file with
3003          * any access mask but you can still write the sd. We need to override
3004          * the granted access before we call set_sd
3005          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3006          */
3007
3008         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3009             && lp_nt_acl_support(SNUM(conn))) {
3010
3011                 uint32_t sec_info_sent;
3012                 uint32_t saved_access_mask = fsp->access_mask;
3013
3014                 sec_info_sent = get_sec_info(sd);
3015
3016                 fsp->access_mask = FILE_GENERIC_ALL;
3017
3018                 /* Convert all the generic bits. */
3019                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3020                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3021
3022                 if (sec_info_sent & (OWNER_SECURITY_INFORMATION|
3023                                         GROUP_SECURITY_INFORMATION|
3024                                         DACL_SECURITY_INFORMATION|
3025                                         SACL_SECURITY_INFORMATION)) {
3026                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3027                 }
3028
3029                 fsp->access_mask = saved_access_mask;
3030
3031                 if (!NT_STATUS_IS_OK(status)) {
3032                         goto fail;
3033                 }
3034         }
3035
3036         if ((ea_list != NULL) &&
3037             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3038                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3039                 if (!NT_STATUS_IS_OK(status)) {
3040                         goto fail;
3041                 }
3042         }
3043
3044         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3045                 status = NT_STATUS_ACCESS_DENIED;
3046                 goto fail;
3047         }
3048
3049         /* Save the requested allocation size. */
3050         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3051                 if (allocation_size
3052                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3053                         fsp->initial_allocation_size = smb_roundup(
3054                                 fsp->conn, allocation_size);
3055                         if (fsp->is_directory) {
3056                                 /* Can't set allocation size on a directory. */
3057                                 status = NT_STATUS_ACCESS_DENIED;
3058                                 goto fail;
3059                         }
3060                         if (vfs_allocate_file_space(
3061                                     fsp, fsp->initial_allocation_size) == -1) {
3062                                 status = NT_STATUS_DISK_FULL;
3063                                 goto fail;
3064                         }
3065                 } else {
3066                         fsp->initial_allocation_size = smb_roundup(
3067                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3068                 }
3069         }
3070
3071         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3072
3073         *result = fsp;
3074         if (pinfo != NULL) {
3075                 *pinfo = info;
3076         }
3077
3078         smb_fname->st = fsp->fsp_name->st;
3079
3080         return NT_STATUS_OK;
3081
3082  fail:
3083         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3084
3085         if (fsp != NULL) {
3086                 if (base_fsp && fsp->base_fsp == base_fsp) {
3087                         /*
3088                          * The close_file below will close
3089                          * fsp->base_fsp.
3090                          */
3091                         base_fsp = NULL;
3092                 }
3093                 close_file(req, fsp, ERROR_CLOSE);
3094                 fsp = NULL;
3095         }
3096         if (base_fsp != NULL) {
3097                 close_file(req, base_fsp, ERROR_CLOSE);
3098                 base_fsp = NULL;
3099         }
3100         return status;
3101 }
3102
3103 /*
3104  * Calculate the full path name given a relative fid.
3105  */
3106 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3107                                    struct smb_request *req,
3108                                    uint16_t root_dir_fid,
3109                                    const struct smb_filename *smb_fname,
3110                                    struct smb_filename **smb_fname_out)
3111 {
3112         files_struct *dir_fsp;
3113         char *parent_fname = NULL;
3114         char *new_base_name = NULL;
3115         NTSTATUS status;
3116
3117         if (root_dir_fid == 0 || !smb_fname) {
3118                 status = NT_STATUS_INTERNAL_ERROR;
3119                 goto out;
3120         }
3121
3122         dir_fsp = file_fsp(req, root_dir_fid);
3123
3124         if (dir_fsp == NULL) {
3125                 status = NT_STATUS_INVALID_HANDLE;
3126                 goto out;
3127         }
3128
3129         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3130                 status = NT_STATUS_INVALID_HANDLE;
3131                 goto out;
3132         }
3133
3134         if (!dir_fsp->is_directory) {
3135
3136                 /*
3137                  * Check to see if this is a mac fork of some kind.
3138                  */
3139
3140                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3141                     is_ntfs_stream_smb_fname(smb_fname)) {
3142                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3143                         goto out;
3144                 }
3145
3146                 /*
3147                   we need to handle the case when we get a
3148                   relative open relative to a file and the
3149                   pathname is blank - this is a reopen!
3150                   (hint from demyn plantenberg)
3151                 */
3152
3153                 status = NT_STATUS_INVALID_HANDLE;
3154                 goto out;
3155         }
3156
3157         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3158                 /*
3159                  * We're at the toplevel dir, the final file name
3160                  * must not contain ./, as this is filtered out
3161                  * normally by srvstr_get_path and unix_convert
3162                  * explicitly rejects paths containing ./.
3163                  */
3164                 parent_fname = talloc_strdup(talloc_tos(), "");
3165                 if (parent_fname == NULL) {
3166                         status = NT_STATUS_NO_MEMORY;
3167                         goto out;
3168                 }
3169         } else {
3170                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3171
3172                 /*
3173                  * Copy in the base directory name.
3174                  */
3175
3176                 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3177                     dir_name_len+2);
3178                 if (parent_fname == NULL) {
3179                         status = NT_STATUS_NO_MEMORY;
3180                         goto out;
3181                 }
3182                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3183                     dir_name_len+1);
3184
3185                 /*
3186                  * Ensure it ends in a '/'.
3187                  * We used TALLOC_SIZE +2 to add space for the '/'.
3188                  */
3189
3190                 if(dir_name_len
3191                     && (parent_fname[dir_name_len-1] != '\\')
3192                     && (parent_fname[dir_name_len-1] != '/')) {
3193                         parent_fname[dir_name_len] = '/';
3194                         parent_fname[dir_name_len+1] = '\0';
3195                 }
3196         }
3197
3198         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3199                                         smb_fname->base_name);
3200         if (new_base_name == NULL) {
3201                 status = NT_STATUS_NO_MEMORY;
3202                 goto out;
3203         }
3204
3205         status = filename_convert(req,
3206                                 conn,
3207                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3208                                 new_base_name,
3209                                 0,
3210                                 NULL,
3211                                 smb_fname_out);
3212         if (!NT_STATUS_IS_OK(status)) {
3213                 goto out;
3214         }
3215
3216  out:
3217         TALLOC_FREE(parent_fname);
3218         return status;
3219 }
3220
3221 NTSTATUS create_file_default(connection_struct *conn,
3222                              struct smb_request *req,
3223                              uint16_t root_dir_fid,
3224                              struct smb_filename *smb_fname,
3225                              uint32_t access_mask,
3226                              uint32_t share_access,
3227                              uint32_t create_disposition,
3228                              uint32_t create_options,
3229                              uint32_t file_attributes,
3230                              uint32_t oplock_request,
3231                              uint64_t allocation_size,
3232                              struct security_descriptor *sd,
3233                              struct ea_list *ea_list,
3234                              files_struct **result,
3235                              int *pinfo)
3236 {
3237         int info = FILE_WAS_OPENED;
3238         files_struct *fsp = NULL;
3239         NTSTATUS status;
3240
3241         DEBUG(10,("create_file: access_mask = 0x%x "
3242                   "file_attributes = 0x%x, share_access = 0x%x, "
3243                   "create_disposition = 0x%x create_options = 0x%x "
3244                   "oplock_request = 0x%x "
3245                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3246                   "fname = %s\n",
3247                   (unsigned int)access_mask,
3248                   (unsigned int)file_attributes,
3249                   (unsigned int)share_access,
3250                   (unsigned int)create_disposition,
3251                   (unsigned int)create_options,
3252                   (unsigned int)oplock_request,
3253                   (unsigned int)root_dir_fid,
3254                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3255
3256         /*
3257          * Calculate the filename from the root_dir_if if necessary.
3258          */
3259
3260         if (root_dir_fid != 0) {
3261                 struct smb_filename *smb_fname_out = NULL;
3262                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3263                                                    smb_fname, &smb_fname_out);
3264                 if (!NT_STATUS_IS_OK(status)) {
3265                         goto fail;
3266                 }
3267                 smb_fname = smb_fname_out;
3268         }
3269
3270         /*
3271          * Check to see if this is a mac fork of some kind.
3272          */
3273
3274         if (is_ntfs_stream_smb_fname(smb_fname)) {
3275                 enum FAKE_FILE_TYPE fake_file_type;
3276
3277                 fake_file_type = is_fake_file(smb_fname);
3278
3279                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3280
3281                         /*
3282                          * Here we go! support for changing the disk quotas
3283                          * --metze
3284                          *
3285                          * We need to fake up to open this MAGIC QUOTA file
3286                          * and return a valid FID.
3287                          *
3288                          * w2k close this file directly after openening xp
3289                          * also tries a QUERY_FILE_INFO on the file and then
3290                          * close it
3291                          */
3292                         status = open_fake_file(req, conn, req->vuid,
3293                                                 fake_file_type, smb_fname,
3294                                                 access_mask, &fsp);
3295                         if (!NT_STATUS_IS_OK(status)) {
3296                                 goto fail;
3297                         }
3298
3299                         ZERO_STRUCT(smb_fname->st);
3300                         goto done;
3301                 }
3302
3303                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3304                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3305                         goto fail;
3306                 }
3307         }
3308
3309         status = create_file_unixpath(
3310                 conn, req, smb_fname, access_mask, share_access,
3311                 create_disposition, create_options, file_attributes,
3312                 oplock_request, allocation_size, sd, ea_list,
3313                 &fsp, &info);
3314
3315         if (!NT_STATUS_IS_OK(status)) {
3316                 goto fail;
3317         }
3318
3319  done:
3320         DEBUG(10, ("create_file: info=%d\n", info));
3321
3322         *result = fsp;
3323         if (pinfo != NULL) {
3324                 *pinfo = info;
3325         }
3326         return NT_STATUS_OK;
3327
3328  fail:
3329         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3330
3331         if (fsp != NULL) {
3332                 close_file(req, fsp, ERROR_CLOSE);
3333                 fsp = NULL;
3334         }
3335         return status;
3336 }