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 "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "auth.h"
  31 #include "messages.h"
  32
  33 extern const struct generic_mapping file_generic_mapping;
  34
  35 struct deferred_open_record {
  36         bool delayed_for_oplocks;
  37         struct file_id id;
  38 };
  39
  40 /****************************************************************************
  41  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
  42 ****************************************************************************/
  43
  44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
  45                                 const struct security_descriptor *sd,
  46                                 const struct security_token *token,
  47                                 uint32_t access_desired,
  48                                 uint32_t *access_granted)
  49 {
  50         *access_granted = 0;
  51
  52         if (get_current_uid(conn) == (uid_t)0) {
  53                 /* I'm sorry sir, I didn't know you were root... */
  54                 *access_granted = access_desired;
  55                 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
  56                         *access_granted |= FILE_GENERIC_ALL;
  57                 }
  58                 return NT_STATUS_OK;
  59         }
  60
  61         return se_access_check(sd,
  62                                 token,
  63                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  64                                 access_granted);
  65 }
  66
  67 /****************************************************************************
  68  Check if we have open rights.
  69 ****************************************************************************/
  70
  71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  72                                 const struct smb_filename *smb_fname,
  73                                 uint32_t access_mask,
  74                                 uint32_t *access_granted)
  75 {
  76         /* Check if we have rights to open. */
  77         NTSTATUS status;
  78         struct security_descriptor *sd = NULL;
  79         uint32_t rejected_share_access;
  80
  81         rejected_share_access = access_mask & ~(conn->share_access);
  82
  83         if (rejected_share_access) {
  84                 *access_granted = rejected_share_access;
  85                 return NT_STATUS_ACCESS_DENIED;
  86         }
  87
  88         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  89                 *access_granted = access_mask;
  90
  91                 DEBUG(10,("smbd_check_open_rights: not checking ACL "
  92                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  93                         smb_fname_str_dbg(smb_fname),
  94                         (unsigned int)*access_granted ));
  95                 return NT_STATUS_OK;
  96         }
  97
  98         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
  99                         (SECINFO_OWNER |
 100                         SECINFO_GROUP |
 101                         SECINFO_DACL),&sd);
 102
 103         if (!NT_STATUS_IS_OK(status)) {
 104                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
 105                         "on %s: %s\n",
 106                         smb_fname_str_dbg(smb_fname),
 107                         nt_errstr(status)));
 108                 return status;
 109         }
 110
 111         status = smb1_file_se_access_check(conn,
 112                                 sd,
 113                                 get_current_nttok(conn),
 114                                 access_mask,
 115                                 access_granted);
 116
 117         DEBUG(10,("smbd_check_open_rights: file %s requesting "
 118                 "0x%x returning 0x%x (%s)\n",
 119                 smb_fname_str_dbg(smb_fname),
 120                 (unsigned int)access_mask,
 121                 (unsigned int)*access_granted,
 122                 nt_errstr(status) ));
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 if (DEBUGLEVEL >= 10) {
 126                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 127                                 smb_fname_str_dbg(smb_fname) ));
 128                         NDR_PRINT_DEBUG(security_descriptor, sd);
 129                 }
 130         }
 131
 132         TALLOC_FREE(sd);
 133
 134         return status;
 135 }
 136
 137 /****************************************************************************
 138  fd support routines - attempt to do a dos_open.
 139 ****************************************************************************/
 140
 141 static NTSTATUS fd_open(struct connection_struct *conn,
 142                     files_struct *fsp,
 143                     int flags,
 144                     mode_t mode)
 145 {
 146         struct smb_filename *smb_fname = fsp->fsp_name;
 147         NTSTATUS status = NT_STATUS_OK;
 148
 149 #ifdef O_NOFOLLOW
 150         /*
 151          * Never follow symlinks on a POSIX client. The
 152          * client should be doing this.
 153          */
 154
 155         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 156                 flags |= O_NOFOLLOW;
 157         }
 158 #endif
 159
 160         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 161         if (fsp->fh->fd == -1) {
 162                 status = map_nt_error_from_unix(errno);
 163                 if (errno == EMFILE) {
 164                         static time_t last_warned = 0L;
 165
 166                         if (time((time_t *) NULL) > last_warned) {
 167                                 DEBUG(0,("Too many open files, unable "
 168                                         "to open more!  smbd's max "
 169                                         "open files = %d\n",
 170                                         lp_max_open_files()));
 171                                 last_warned = time((time_t *) NULL);
 172                         }
 173                 }
 174
 175         }
 176
 177         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 178                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 179                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 180
 181         return status;
 182 }
 183
 184 /****************************************************************************
 185  Close the file associated with a fsp.
 186 ****************************************************************************/
 187
 188 NTSTATUS fd_close(files_struct *fsp)
 189 {
 190         int ret;
 191
 192         if (fsp->dptr) {
 193                 dptr_CloseDir(fsp);
 194         }
 195         if (fsp->fh->fd == -1) {
 196                 return NT_STATUS_OK; /* What we used to call a stat open. */
 197         }
 198         if (fsp->fh->ref_count > 1) {
 199                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 200         }
 201
 202         ret = SMB_VFS_CLOSE(fsp);
 203         fsp->fh->fd = -1;
 204         if (ret == -1) {
 205                 return map_nt_error_from_unix(errno);
 206         }
 207         return NT_STATUS_OK;
 208 }
 209
 210 /****************************************************************************
 211  Change the ownership of a file to that of the parent directory.
 212  Do this by fd if possible.
 213 ****************************************************************************/
 214
 215 void change_file_owner_to_parent(connection_struct *conn,
 216                                         const char *inherit_from_dir,
 217                                         files_struct *fsp)
 218 {
 219         struct smb_filename *smb_fname_parent = NULL;
 220         NTSTATUS status;
 221         int ret;
 222
 223         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 224                                             NULL, NULL, &smb_fname_parent);
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 return;
 227         }
 228
 229         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 230         if (ret == -1) {
 231                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 232                          "directory %s. Error was %s\n",
 233                          smb_fname_str_dbg(smb_fname_parent),
 234                          strerror(errno)));
 235                 TALLOC_FREE(smb_fname_parent);
 236                 return;
 237         }
 238
 239         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 240                 /* Already this uid - no need to change. */
 241                 DEBUG(10,("change_file_owner_to_parent: file %s "
 242                         "is already owned by uid %d\n",
 243                         fsp_str_dbg(fsp),
 244                         (int)fsp->fsp_name->st.st_ex_uid ));
 245                 TALLOC_FREE(smb_fname_parent);
 246                 return;
 247         }
 248
 249         become_root();
 250         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 251         unbecome_root();
 252         if (ret == -1) {
 253                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 254                          "file %s to parent directory uid %u. Error "
 255                          "was %s\n", fsp_str_dbg(fsp),
 256                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 257                          strerror(errno) ));
 258         } else {
 259                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 260                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 261                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 262                 /* Ensure the uid entry is updated. */
 263                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 264         }
 265
 266         TALLOC_FREE(smb_fname_parent);
 267 }
 268
 269 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 270                                        const char *inherit_from_dir,
 271                                        const char *fname,
 272                                        SMB_STRUCT_STAT *psbuf)
 273 {
 274         struct smb_filename *smb_fname_parent = NULL;
 275         struct smb_filename *smb_fname_cwd = NULL;
 276         char *saved_dir = NULL;
 277         TALLOC_CTX *ctx = talloc_tos();
 278         NTSTATUS status = NT_STATUS_OK;
 279         int ret;
 280
 281         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 282                                             &smb_fname_parent);
 283         if (!NT_STATUS_IS_OK(status)) {
 284                 return status;
 285         }
 286
 287         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 288         if (ret == -1) {
 289                 status = map_nt_error_from_unix(errno);
 290                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 291                          "directory %s. Error was %s\n",
 292                          smb_fname_str_dbg(smb_fname_parent),
 293                          strerror(errno)));
 294                 goto out;
 295         }
 296
 297         /* We've already done an lstat into psbuf, and we know it's a
 298            directory. If we can cd into the directory and the dev/ino
 299            are the same then we can safely chown without races as
 300            we're locking the directory in place by being in it.  This
 301            should work on any UNIX (thanks tridge :-). JRA.
 302         */
 303
 304         saved_dir = vfs_GetWd(ctx,conn);
 305         if (!saved_dir) {
 306                 status = map_nt_error_from_unix(errno);
 307                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 308                          "current working directory. Error was %s\n",
 309                          strerror(errno)));
 310                 goto out;
 311         }
 312
 313         /* Chdir into the new path. */
 314         if (vfs_ChDir(conn, fname) == -1) {
 315                 status = map_nt_error_from_unix(errno);
 316                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 317                          "current working directory to %s. Error "
 318                          "was %s\n", fname, strerror(errno) ));
 319                 goto chdir;
 320         }
 321
 322         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 323                                             &smb_fname_cwd);
 324         if (!NT_STATUS_IS_OK(status)) {
 325                 return status;
 326         }
 327
 328         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 329         if (ret == -1) {
 330                 status = map_nt_error_from_unix(errno);
 331                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 332                          "directory '.' (%s) Error was %s\n",
 333                          fname, strerror(errno)));
 334                 goto chdir;
 335         }
 336
 337         /* Ensure we're pointing at the same place. */
 338         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 339             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 340                 DEBUG(0,("change_dir_owner_to_parent: "
 341                          "device/inode on directory %s changed. "
 342                          "Refusing to chown !\n", fname ));
 343                 status = NT_STATUS_ACCESS_DENIED;
 344                 goto chdir;
 345         }
 346
 347         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 348                 /* Already this uid - no need to change. */
 349                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 350                         "is already owned by uid %d\n",
 351                         fname,
 352                         (int)smb_fname_cwd->st.st_ex_uid ));
 353                 status = NT_STATUS_OK;
 354                 goto chdir;
 355         }
 356
 357         become_root();
 358         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 359                             (gid_t)-1);
 360         unbecome_root();
 361         if (ret == -1) {
 362                 status = map_nt_error_from_unix(errno);
 363                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 364                           "directory %s to parent directory uid %u. "
 365                           "Error was %s\n", fname,
 366                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 367                           strerror(errno) ));
 368         } else {
 369                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 370                         "directory %s to parent directory uid %u.\n",
 371                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 372                 /* Ensure the uid entry is updated. */
 373                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 374         }
 375
 376  chdir:
 377         vfs_ChDir(conn,saved_dir);
 378  out:
 379         TALLOC_FREE(smb_fname_parent);
 380         TALLOC_FREE(smb_fname_cwd);
 381         return status;
 382 }
 383
 384 /****************************************************************************
 385  Open a file.
 386 ****************************************************************************/
 387
 388 static NTSTATUS open_file(files_struct *fsp,
 389                           connection_struct *conn,
 390                           struct smb_request *req,
 391                           const char *parent_dir,
 392                           int flags,
 393                           mode_t unx_mode,
 394                           uint32 access_mask, /* client requested access mask. */
 395                           uint32 open_access_mask) /* what we're actually using in the open. */
 396 {
 397         struct smb_filename *smb_fname = fsp->fsp_name;
 398         NTSTATUS status = NT_STATUS_OK;
 399         int accmode = (flags & O_ACCMODE);
 400         int local_flags = flags;
 401         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 402         bool file_created = false;
 403
 404         fsp->fh->fd = -1;
 405         errno = EPERM;
 406
 407         /* Check permissions */
 408
 409         /*
 410          * This code was changed after seeing a client open request
 411          * containing the open mode of (DENY_WRITE/read-only) with
 412          * the 'create if not exist' bit set. The previous code
 413          * would fail to open the file read only on a read-only share
 414          * as it was checking the flags parameter  directly against O_RDONLY,
 415          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 416          * JRA.
 417          */
 418
 419         if (!CAN_WRITE(conn)) {
 420                 /* It's a read-only share - fail if we wanted to write. */
 421                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 422                         DEBUG(3,("Permission denied opening %s\n",
 423                                  smb_fname_str_dbg(smb_fname)));
 424                         return NT_STATUS_ACCESS_DENIED;
 425                 } else if(flags & O_CREAT) {
 426                         /* We don't want to write - but we must make sure that
 427                            O_CREAT doesn't create the file if we have write
 428                            access into the directory.
 429                         */
 430                         flags &= ~(O_CREAT|O_EXCL);
 431                         local_flags &= ~(O_CREAT|O_EXCL);
 432                 }
 433         }
 434
 435         /*
 436          * This little piece of insanity is inspired by the
 437          * fact that an NT client can open a file for O_RDONLY,
 438          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 439          * If the client *can* write to the file, then it expects to
 440          * truncate the file, even though it is opening for readonly.
 441          * Quicken uses this stupid trick in backup file creation...
 442          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 443          * for helping track this one down. It didn't bite us in 2.0.x
 444          * as we always opened files read-write in that release. JRA.
 445          */
 446
 447         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 448                 DEBUG(10,("open_file: truncate requested on read-only open "
 449                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 450                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 451         }
 452
 453         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 454             (!file_existed && (local_flags & O_CREAT)) ||
 455             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 456                 const char *wild;
 457
 458                 /*
 459                  * We can't actually truncate here as the file may be locked.
 460                  * open_file_ntcreate will take care of the truncate later. JRA.
 461                  */
 462
 463                 local_flags &= ~O_TRUNC;
 464
 465 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 466                 /*
 467                  * We would block on opening a FIFO with no one else on the
 468                  * other end. Do what we used to do and add O_NONBLOCK to the
 469                  * open flags. JRA.
 470                  */
 471
 472                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 473                         local_flags |= O_NONBLOCK;
 474                 }
 475 #endif
 476
 477                 /* Don't create files with Microsoft wildcard characters. */
 478                 if (fsp->base_fsp) {
 479                         /*
 480                          * wildcard characters are allowed in stream names
 481                          * only test the basefilename
 482                          */
 483                         wild = fsp->base_fsp->fsp_name->base_name;
 484                 } else {
 485                         wild = smb_fname->base_name;
 486                 }
 487                 if ((local_flags & O_CREAT) && !file_existed &&
 488                     ms_has_wild(wild))  {
 489                         return NT_STATUS_OBJECT_NAME_INVALID;
 490                 }
 491
 492                 /* Actually do the open */
 493                 status = fd_open(conn, fsp, local_flags, unx_mode);
 494                 if (!NT_STATUS_IS_OK(status)) {
 495                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 496                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 497                                  nt_errstr(status),local_flags,flags));
 498                         return status;
 499                 }
 500
 501                 if ((local_flags & O_CREAT) && !file_existed) {
 502                         file_created = true;
 503                 }
 504
 505         } else {
 506                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 507                 if (file_existed) {
 508                         uint32_t access_granted = 0;
 509
 510                         status = smbd_check_open_rights(conn,
 511                                         smb_fname,
 512                                         access_mask,
 513                                         &access_granted);
 514                         if (!NT_STATUS_IS_OK(status)) {
 515                                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 516                                         /*
 517                                          * On NT_STATUS_ACCESS_DENIED, access_granted
 518                                          * contains the denied bits.
 519                                          */
 520
 521                                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 522                                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
 523                                                         (lp_map_readonly(SNUM(conn)) ||
 524                                                          lp_map_archive(SNUM(conn)) ||
 525                                                          lp_map_hidden(SNUM(conn)) ||
 526                                                          lp_map_system(SNUM(conn)))) {
 527                                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
 528
 529                                                 DEBUG(10,("open_file: "
 530                                                           "overrode "
 531                                                           "FILE_WRITE_"
 532                                                           "ATTRIBUTES "
 533                                                           "on file %s\n",
 534                                                           smb_fname_str_dbg(
 535                                                                   smb_fname)));
 536                                         }
 537
 538                                         if ((access_mask & DELETE_ACCESS) &&
 539                                             (access_granted & DELETE_ACCESS) &&
 540                                             can_delete_file_in_directory(conn,
 541                                                 smb_fname)) {
 542                                                 /* Were we trying to do a stat open
 543                                                  * for delete and didn't get DELETE
 544                                                  * access (only) ? Check if the
 545                                                  * directory allows DELETE_CHILD.
 546                                                  * See here:
 547                                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 548                                                  * for details. */
 549
 550                                                 access_granted &= ~DELETE_ACCESS;
 551
 552                                                 DEBUG(10,("open_file: "
 553                                                           "overrode "
 554                                                           "DELETE_ACCESS on "
 555                                                           "file %s\n",
 556                                                           smb_fname_str_dbg(
 557                                                                   smb_fname)));
 558                                         }
 559
 560                                         if (access_granted != 0) {
 561                                                 DEBUG(10,("open_file: Access "
 562                                                           "denied on file "
 563                                                           "%s\n",
 564                                                           smb_fname_str_dbg(
 565                                                                   smb_fname)));
 566                                                 return status;
 567                                         }
 568                                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 569                                     fsp->posix_open &&
 570                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
 571                                         /* This is a POSIX stat open for delete
 572                                          * or rename on a symlink that points
 573                                          * nowhere. Allow. */
 574                                         DEBUG(10,("open_file: allowing POSIX "
 575                                                   "open on bad symlink %s\n",
 576                                                   smb_fname_str_dbg(
 577                                                           smb_fname)));
 578                                 } else {
 579                                         DEBUG(10,("open_file: "
 580                                                   "smbd_check_open_rights on file "
 581                                                   "%s returned %s\n",
 582                                                   smb_fname_str_dbg(smb_fname),
 583                                                   nt_errstr(status) ));
 584                                         return status;
 585                                 }
 586                         }
 587                 }
 588         }
 589
 590         if (!file_existed) {
 591                 int ret;
 592
 593                 if (fsp->fh->fd == -1) {
 594                         ret = SMB_VFS_STAT(conn, smb_fname);
 595                 } else {
 596                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 597                         /* If we have an fd, this stat should succeed. */
 598                         if (ret == -1) {
 599                                 DEBUG(0,("Error doing fstat on open file %s "
 600                                          "(%s)\n",
 601                                          smb_fname_str_dbg(smb_fname),
 602                                          strerror(errno) ));
 603                         }
 604                 }
 605
 606                 /* For a non-io open, this stat failing means file not found. JRA */
 607                 if (ret == -1) {
 608                         status = map_nt_error_from_unix(errno);
 609                         fd_close(fsp);
 610                         return status;
 611                 }
 612
 613                 if (file_created) {
 614                         bool need_re_stat = false;
 615                         /* Do all inheritance work after we've
 616                            done a successful stat call and filled
 617                            in the stat struct in fsp->fsp_name. */
 618
 619                         /* Inherit the ACL if required */
 620                         if (lp_inherit_perms(SNUM(conn))) {
 621                                 inherit_access_posix_acl(conn, parent_dir,
 622                                                          smb_fname->base_name,
 623                                                          unx_mode);
 624                                 need_re_stat = true;
 625                         }
 626
 627                         /* Change the owner if required. */
 628                         if (lp_inherit_owner(SNUM(conn))) {
 629                                 change_file_owner_to_parent(conn, parent_dir,
 630                                                             fsp);
 631                                 need_re_stat = true;
 632                         }
 633
 634                         if (need_re_stat) {
 635                                 if (fsp->fh->fd == -1) {
 636                                         ret = SMB_VFS_STAT(conn, smb_fname);
 637                                 } else {
 638                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 639                                         /* If we have an fd, this stat should succeed. */
 640                                         if (ret == -1) {
 641                                                 DEBUG(0,("Error doing fstat on open file %s "
 642                                                          "(%s)\n",
 643                                                          smb_fname_str_dbg(smb_fname),
 644                                                          strerror(errno) ));
 645                                         }
 646                                 }
 647                         }
 648
 649                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 650                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 651                                      smb_fname->base_name);
 652                 }
 653         }
 654
 655         /*
 656          * POSIX allows read-only opens of directories. We don't
 657          * want to do this (we use a different code path for this)
 658          * so catch a directory open and return an EISDIR. JRA.
 659          */
 660
 661         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 662                 fd_close(fsp);
 663                 errno = EISDIR;
 664                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 665         }
 666
 667         fsp->mode = smb_fname->st.st_ex_mode;
 668         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 669         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 670         fsp->file_pid = req ? req->smbpid : 0;
 671         fsp->can_lock = True;
 672         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 673         if (!CAN_WRITE(conn)) {
 674                 fsp->can_write = False;
 675         } else {
 676                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 677                         True : False;
 678         }
 679         fsp->print_file = NULL;
 680         fsp->modified = False;
 681         fsp->sent_oplock_break = NO_BREAK_SENT;
 682         fsp->is_directory = False;
 683         if (conn->aio_write_behind_list &&
 684             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 685                        conn->case_sensitive)) {
 686                 fsp->aio_write_behind = True;
 687         }
 688
 689         fsp->wcp = NULL; /* Write cache pointer. */
 690
 691         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 692                  conn->session_info->unix_info->unix_name,
 693                  smb_fname_str_dbg(smb_fname),
 694                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 695                  conn->num_files_open));
 696
 697         errno = 0;
 698         return NT_STATUS_OK;
 699 }
 700
 701 /*******************************************************************
 702  Return True if the filename is one of the special executable types.
 703 ********************************************************************/
 704
 705 bool is_executable(const char *fname)
 706 {
 707         if ((fname = strrchr_m(fname,'.'))) {
 708                 if (strequal(fname,".com") ||
 709                     strequal(fname,".dll") ||
 710                     strequal(fname,".exe") ||
 711                     strequal(fname,".sym")) {
 712                         return True;
 713                 }
 714         }
 715         return False;
 716 }
 717
 718 /****************************************************************************
 719  Check if we can open a file with a share mode.
 720  Returns True if conflict, False if not.
 721 ****************************************************************************/
 722
 723 static bool share_conflict(struct share_mode_entry *entry,
 724                            uint32 access_mask,
 725                            uint32 share_access)
 726 {
 727         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 728                   "entry->share_access = 0x%x, "
 729                   "entry->private_options = 0x%x\n",
 730                   (unsigned int)entry->access_mask,
 731                   (unsigned int)entry->share_access,
 732                   (unsigned int)entry->private_options));
 733
 734         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 735                   (unsigned int)access_mask, (unsigned int)share_access));
 736
 737         if ((entry->access_mask & (FILE_WRITE_DATA|
 738                                    FILE_APPEND_DATA|
 739                                    FILE_READ_DATA|
 740                                    FILE_EXECUTE|
 741                                    DELETE_ACCESS)) == 0) {
 742                 DEBUG(10,("share_conflict: No conflict due to "
 743                           "entry->access_mask = 0x%x\n",
 744                           (unsigned int)entry->access_mask ));
 745                 return False;
 746         }
 747
 748         if ((access_mask & (FILE_WRITE_DATA|
 749                             FILE_APPEND_DATA|
 750                             FILE_READ_DATA|
 751                             FILE_EXECUTE|
 752                             DELETE_ACCESS)) == 0) {
 753                 DEBUG(10,("share_conflict: No conflict due to "
 754                           "access_mask = 0x%x\n",
 755                           (unsigned int)access_mask ));
 756                 return False;
 757         }
 758
 759 #if 1 /* JRA TEST - Superdebug. */
 760 #define CHECK_MASK(num, am, right, sa, share) \
 761         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 762                 (unsigned int)(num), (unsigned int)(am), \
 763                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 764         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 765                 (unsigned int)(num), (unsigned int)(sa), \
 766                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 767         if (((am) & (right)) && !((sa) & (share))) { \
 768                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 769 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 770                         (unsigned int)(share) )); \
 771                 return True; \
 772         }
 773 #else
 774 #define CHECK_MASK(num, am, right, sa, share) \
 775         if (((am) & (right)) && !((sa) & (share))) { \
 776                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 777 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 778                         (unsigned int)(share) )); \
 779                 return True; \
 780         }
 781 #endif
 782
 783         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 784                    share_access, FILE_SHARE_WRITE);
 785         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 786                    entry->share_access, FILE_SHARE_WRITE);
 787
 788         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 789                    share_access, FILE_SHARE_READ);
 790         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 791                    entry->share_access, FILE_SHARE_READ);
 792
 793         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 794                    share_access, FILE_SHARE_DELETE);
 795         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 796                    entry->share_access, FILE_SHARE_DELETE);
 797
 798         DEBUG(10,("share_conflict: No conflict.\n"));
 799         return False;
 800 }
 801
 802 #if defined(DEVELOPER)
 803 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 804                                       int num,
 805                                       struct share_mode_entry *share_entry)
 806 {
 807         files_struct *fsp;
 808
 809         if (!procid_is_me(&share_entry->pid)) {
 810                 return;
 811         }
 812
 813         if (is_deferred_open_entry(share_entry) &&
 814             !open_was_deferred(share_entry->op_mid)) {
 815                 char *str = talloc_asprintf(talloc_tos(),
 816                         "Got a deferred entry without a request: "
 817                         "PANIC: %s\n",
 818                         share_mode_str(talloc_tos(), num, share_entry));
 819                 smb_panic(str);
 820         }
 821
 822         if (!is_valid_share_mode_entry(share_entry)) {
 823                 return;
 824         }
 825
 826         fsp = file_find_dif(sconn, share_entry->id,
 827                             share_entry->share_file_id);
 828         if (!fsp) {
 829                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 830                          share_mode_str(talloc_tos(), num, share_entry) ));
 831                 smb_panic("validate_my_share_entries: Cannot match a "
 832                           "share entry with an open file\n");
 833         }
 834
 835         if (is_deferred_open_entry(share_entry) ||
 836             is_unused_share_mode_entry(share_entry)) {
 837                 goto panic;
 838         }
 839
 840         if ((share_entry->op_type == NO_OPLOCK) &&
 841             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 842                 /* Someone has already written to it, but I haven't yet
 843                  * noticed */
 844                 return;
 845         }
 846
 847         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 848                 goto panic;
 849         }
 850
 851         return;
 852
 853  panic:
 854         {
 855                 char *str;
 856                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 857                          share_mode_str(talloc_tos(), num, share_entry) ));
 858                 str = talloc_asprintf(talloc_tos(),
 859                         "validate_my_share_entries: "
 860                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 861                          fsp->fsp_name->base_name,
 862                          (unsigned int)fsp->oplock_type,
 863                          (unsigned int)share_entry->op_type );
 864                 smb_panic(str);
 865         }
 866 }
 867 #endif
 868
 869 bool is_stat_open(uint32 access_mask)
 870 {
 871         return (access_mask &&
 872                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 873                                   FILE_WRITE_ATTRIBUTES))==0) &&
 874                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 875                                  FILE_WRITE_ATTRIBUTES)) != 0));
 876 }
 877
 878 /****************************************************************************
 879  Deal with share modes
 880  Invarient: Share mode must be locked on entry and exit.
 881  Returns -1 on error, or number of share modes on success (may be zero).
 882 ****************************************************************************/
 883
 884 static NTSTATUS open_mode_check(connection_struct *conn,
 885                                 struct share_mode_lock *lck,
 886                                 uint32_t name_hash,
 887                                 uint32 access_mask,
 888                                 uint32 share_access,
 889                                 uint32 create_options,
 890                                 bool *file_existed)
 891 {
 892         int i;
 893
 894         if(lck->num_share_modes == 0) {
 895                 return NT_STATUS_OK;
 896         }
 897
 898         *file_existed = True;
 899
 900         /* A delete on close prohibits everything */
 901
 902         if (is_delete_on_close_set(lck, name_hash)) {
 903                 return NT_STATUS_DELETE_PENDING;
 904         }
 905
 906         if (is_stat_open(access_mask)) {
 907                 /* Stat open that doesn't trigger oplock breaks or share mode
 908                  * checks... ! JRA. */
 909                 return NT_STATUS_OK;
 910         }
 911
 912         /*
 913          * Check if the share modes will give us access.
 914          */
 915
 916 #if defined(DEVELOPER)
 917         for(i = 0; i < lck->num_share_modes; i++) {
 918                 validate_my_share_entries(conn->sconn, i,
 919                                           &lck->share_modes[i]);
 920         }
 921 #endif
 922
 923         if (!lp_share_modes(SNUM(conn))) {
 924                 return NT_STATUS_OK;
 925         }
 926
 927         /* Now we check the share modes, after any oplock breaks. */
 928         for(i = 0; i < lck->num_share_modes; i++) {
 929
 930                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 931                         continue;
 932                 }
 933
 934                 /* someone else has a share lock on it, check to see if we can
 935                  * too */
 936                 if (share_conflict(&lck->share_modes[i],
 937                                    access_mask, share_access)) {
 938                         return NT_STATUS_SHARING_VIOLATION;
 939                 }
 940         }
 941
 942         return NT_STATUS_OK;
 943 }
 944
 945 static bool is_delete_request(files_struct *fsp) {
 946         return ((fsp->access_mask == DELETE_ACCESS) &&
 947                 (fsp->oplock_type == NO_OPLOCK));
 948 }
 949
 950 /*
 951  * Send a break message to the oplock holder and delay the open for
 952  * our client.
 953  */
 954
 955 static NTSTATUS send_break_message(files_struct *fsp,
 956                                         struct share_mode_entry *exclusive,
 957                                         uint64_t mid,
 958                                         int oplock_request)
 959 {
 960         NTSTATUS status;
 961         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 962
 963         DEBUG(10, ("Sending break request to PID %s\n",
 964                    procid_str_static(&exclusive->pid)));
 965         exclusive->op_mid = mid;
 966
 967         /* Create the message. */
 968         share_mode_entry_to_message(msg, exclusive);
 969
 970         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 971            don't want this set in the share mode struct pointed to by lck. */
 972
 973         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 974                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
 975                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 976         }
 977
 978         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
 979                                     MSG_SMB_BREAK_REQUEST,
 980                                     (uint8 *)msg,
 981                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 982         if (!NT_STATUS_IS_OK(status)) {
 983                 DEBUG(3, ("Could not send oplock break message: %s\n",
 984                           nt_errstr(status)));
 985         }
 986
 987         return status;
 988 }
 989
 990 /*
 991  * Return share_mode_entry pointers for :
 992  * 1). Batch oplock entry.
 993  * 2). Batch or exclusive oplock entry (may be identical to #1).
 994  * bool have_level2_oplock
 995  * bool have_no_oplock.
 996  * Do internal consistency checks on the share mode for a file.
 997  */
 998
 999 static void find_oplock_types(files_struct *fsp,
1000                                 int oplock_request,
1001                                 struct share_mode_lock *lck,
1002                                 struct share_mode_entry **pp_batch,
1003                                 struct share_mode_entry **pp_ex_or_batch,
1004                                 bool *got_level2,
1005                                 bool *got_no_oplock)
1006 {
1007         int i;
1008
1009         *pp_batch = NULL;
1010         *pp_ex_or_batch = NULL;
1011         *got_level2 = false;
1012         *got_no_oplock = false;
1013
1014         /* Ignore stat or internal opens, as is done in
1015                 delay_for_batch_oplocks() and
1016                 delay_for_exclusive_oplocks().
1017          */
1018         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1019                 return;
1020         }
1021
1022         for (i=0; i<lck->num_share_modes; i++) {
1023                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1024                         continue;
1025                 }
1026
1027                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1028                                 is_stat_open(lck->share_modes[i].access_mask)) {
1029                         /* We ignore stat opens in the table - they
1030                            always have NO_OPLOCK and never get or
1031                            cause breaks. JRA. */
1032                         continue;
1033                 }
1034
1035                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1036                         /* batch - can only be one. */
1037                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1038                                 smb_panic("Bad batch oplock entry.");
1039                         }
1040                         *pp_batch = &lck->share_modes[i];
1041                 }
1042
1043                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1044                         /* Exclusive or batch - can only be one. */
1045                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1046                                 smb_panic("Bad exclusive or batch oplock entry.");
1047                         }
1048                         *pp_ex_or_batch = &lck->share_modes[i];
1049                 }
1050
1051                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1052                         if (*pp_batch || *pp_ex_or_batch) {
1053                                 smb_panic("Bad levelII oplock entry.");
1054                         }
1055                         *got_level2 = true;
1056                 }
1057
1058                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1059                         if (*pp_batch || *pp_ex_or_batch) {
1060                                 smb_panic("Bad no oplock entry.");
1061                         }
1062                         *got_no_oplock = true;
1063                 }
1064         }
1065 }
1066
1067 static bool delay_for_batch_oplocks(files_struct *fsp,
1068                                         uint64_t mid,
1069                                         int oplock_request,
1070                                         struct share_mode_entry *batch_entry)
1071 {
1072         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1073                 return false;
1074         }
1075
1076         if (batch_entry != NULL) {
1077                 /* Found a batch oplock */
1078                 send_break_message(fsp, batch_entry, mid, oplock_request);
1079                 return true;
1080         }
1081         return false;
1082 }
1083
1084 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1085                                         uint64_t mid,
1086                                         int oplock_request,
1087                                         struct share_mode_entry *ex_entry)
1088 {
1089         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1090                 return false;
1091         }
1092
1093         if (ex_entry != NULL) {
1094                 /* Found an exclusive or batch oplock */
1095                 bool delay_it = is_delete_request(fsp) ?
1096                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1097                 if (delay_it) {
1098                         send_break_message(fsp, ex_entry, mid, oplock_request);
1099                         return true;
1100                 }
1101         }
1102         return false;
1103 }
1104
1105 static void grant_fsp_oplock_type(files_struct *fsp,
1106                                 const struct byte_range_lock *br_lck,
1107                                 int oplock_request,
1108                                 bool got_level2_oplock,
1109                                 bool got_a_none_oplock)
1110 {
1111         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1112                             lp_level2_oplocks(SNUM(fsp->conn));
1113
1114         /* Start by granting what the client asked for,
1115            but ensure no SAMBA_PRIVATE bits can be set. */
1116         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1117
1118         if (oplock_request & INTERNAL_OPEN_ONLY) {
1119                 /* No oplocks on internal open. */
1120                 fsp->oplock_type = NO_OPLOCK;
1121                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1122                         fsp->oplock_type, fsp_str_dbg(fsp)));
1123                 return;
1124         } else if (br_lck && br_lck->num_locks > 0) {
1125                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1126                         fsp_str_dbg(fsp)));
1127                 fsp->oplock_type = NO_OPLOCK;
1128         }
1129
1130         if (is_stat_open(fsp->access_mask)) {
1131                 /* Leave the value already set. */
1132                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1133                         fsp->oplock_type, fsp_str_dbg(fsp)));
1134                 return;
1135         }
1136
1137         /*
1138          * Match what was requested (fsp->oplock_type) with
1139          * what was found in the existing share modes.
1140          */
1141
1142         if (got_a_none_oplock) {
1143                 fsp->oplock_type = NO_OPLOCK;
1144         } else if (got_level2_oplock) {
1145                 if (fsp->oplock_type == NO_OPLOCK ||
1146                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1147                         /* Store a level2 oplock, but don't tell the client */
1148                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1149                 } else {
1150                         fsp->oplock_type = LEVEL_II_OPLOCK;
1151                 }
1152         } else {
1153                 /* All share_mode_entries are placeholders or deferred.
1154                  * Silently upgrade to fake levelII if the client didn't
1155                  * ask for an oplock. */
1156                 if (fsp->oplock_type == NO_OPLOCK) {
1157                         /* Store a level2 oplock, but don't tell the client */
1158                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1159                 }
1160         }
1161
1162         /*
1163          * Don't grant level2 to clients that don't want them
1164          * or if we've turned them off.
1165          */
1166         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1167                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1168         }
1169
1170         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1171                   fsp->oplock_type, fsp_str_dbg(fsp)));
1172 }
1173
1174 bool request_timed_out(struct timeval request_time,
1175                        struct timeval timeout)
1176 {
1177         struct timeval now, end_time;
1178         GetTimeOfDay(&now);
1179         end_time = timeval_sum(&request_time, &timeout);
1180         return (timeval_compare(&end_time, &now) < 0);
1181 }
1182
1183 /****************************************************************************
1184  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1185 ****************************************************************************/
1186
1187 static void defer_open(struct share_mode_lock *lck,
1188                        struct timeval request_time,
1189                        struct timeval timeout,
1190                        struct smb_request *req,
1191                        struct deferred_open_record *state)
1192 {
1193         int i;
1194
1195         /* Paranoia check */
1196
1197         for (i=0; i<lck->num_share_modes; i++) {
1198                 struct share_mode_entry *e = &lck->share_modes[i];
1199
1200                 if (!is_deferred_open_entry(e)) {
1201                         continue;
1202                 }
1203
1204                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1205                         DEBUG(0, ("Trying to defer an already deferred "
1206                                 "request: mid=%llu, exiting\n",
1207                                 (unsigned long long)req->mid));
1208                         exit_server("attempt to defer a deferred request");
1209                 }
1210         }
1211
1212         /* End paranoia check */
1213
1214         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1215                   "open entry for mid %llu\n",
1216                   (unsigned int)request_time.tv_sec,
1217                   (unsigned int)request_time.tv_usec,
1218                   (unsigned long long)req->mid));
1219
1220         if (!push_deferred_open_message_smb(req, request_time, timeout,
1221                                        state->id, (char *)state, sizeof(*state))) {
1222                 exit_server("push_deferred_open_message_smb failed");
1223         }
1224         add_deferred_open(lck, req->mid, request_time,
1225                           sconn_server_id(req->sconn), state->id);
1226 }
1227
1228
1229 /****************************************************************************
1230  On overwrite open ensure that the attributes match.
1231 ****************************************************************************/
1232
1233 bool open_match_attributes(connection_struct *conn,
1234                            uint32 old_dos_attr,
1235                            uint32 new_dos_attr,
1236                            mode_t existing_unx_mode,
1237                            mode_t new_unx_mode,
1238                            mode_t *returned_unx_mode)
1239 {
1240         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1241
1242         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1243         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1244
1245         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1246            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1247                 *returned_unx_mode = new_unx_mode;
1248         } else {
1249                 *returned_unx_mode = (mode_t)0;
1250         }
1251
1252         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1253                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1254                   "returned_unx_mode = 0%o\n",
1255                   (unsigned int)old_dos_attr,
1256                   (unsigned int)existing_unx_mode,
1257                   (unsigned int)new_dos_attr,
1258                   (unsigned int)*returned_unx_mode ));
1259
1260         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1261         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1262                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1263                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1264                         return False;
1265                 }
1266         }
1267         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1268                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1269                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1270                         return False;
1271                 }
1272         }
1273         return True;
1274 }
1275
1276 /****************************************************************************
1277  Special FCB or DOS processing in the case of a sharing violation.
1278  Try and find a duplicated file handle.
1279 ****************************************************************************/
1280
1281 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1282                                      connection_struct *conn,
1283                                      files_struct *fsp_to_dup_into,
1284                                      const struct smb_filename *smb_fname,
1285                                      struct file_id id,
1286                                      uint16 file_pid,
1287                                      uint16 vuid,
1288                                      uint32 access_mask,
1289                                      uint32 share_access,
1290                                      uint32 create_options)
1291 {
1292         files_struct *fsp;
1293
1294         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1295                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1296
1297         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1298             fsp = file_find_di_next(fsp)) {
1299
1300                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1301                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1302                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1303                           fsp->fh->fd, (unsigned int)fsp->vuid,
1304                           (unsigned int)fsp->file_pid,
1305                           (unsigned int)fsp->fh->private_options,
1306                           (unsigned int)fsp->access_mask ));
1307
1308                 if (fsp->fh->fd != -1 &&
1309                     fsp->vuid == vuid &&
1310                     fsp->file_pid == file_pid &&
1311                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1312                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1313                     (fsp->access_mask & FILE_WRITE_DATA) &&
1314                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1315                     strequal(fsp->fsp_name->stream_name,
1316                              smb_fname->stream_name)) {
1317                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1318                         break;
1319                 }
1320         }
1321
1322         if (!fsp) {
1323                 return NT_STATUS_NOT_FOUND;
1324         }
1325
1326         /* quite an insane set of semantics ... */
1327         if (is_executable(smb_fname->base_name) &&
1328             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1329                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1330                 return NT_STATUS_INVALID_PARAMETER;
1331         }
1332
1333         /* We need to duplicate this fsp. */
1334         return dup_file_fsp(req, fsp, access_mask, share_access,
1335                             create_options, fsp_to_dup_into);
1336 }
1337
1338 /****************************************************************************
1339  Open a file with a share mode - old openX method - map into NTCreate.
1340 ****************************************************************************/
1341
1342 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1343                                  int deny_mode, int open_func,
1344                                  uint32 *paccess_mask,
1345                                  uint32 *pshare_mode,
1346                                  uint32 *pcreate_disposition,
1347                                  uint32 *pcreate_options,
1348                                  uint32_t *pprivate_flags)
1349 {
1350         uint32 access_mask;
1351         uint32 share_mode;
1352         uint32 create_disposition;
1353         uint32 create_options = FILE_NON_DIRECTORY_FILE;
1354         uint32_t private_flags = 0;
1355
1356         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1357                   "open_func = 0x%x\n",
1358                   smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1359                   (unsigned int)open_func ));
1360
1361         /* Create the NT compatible access_mask. */
1362         switch (GET_OPENX_MODE(deny_mode)) {
1363                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1364                 case DOS_OPEN_RDONLY:
1365                         access_mask = FILE_GENERIC_READ;
1366                         break;
1367                 case DOS_OPEN_WRONLY:
1368                         access_mask = FILE_GENERIC_WRITE;
1369                         break;
1370                 case DOS_OPEN_RDWR:
1371                 case DOS_OPEN_FCB:
1372                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1373                         break;
1374                 default:
1375                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1376                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
1377                         return False;
1378         }
1379
1380         /* Create the NT compatible create_disposition. */
1381         switch (open_func) {
1382                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1383                         create_disposition = FILE_CREATE;
1384                         break;
1385
1386                 case OPENX_FILE_EXISTS_OPEN:
1387                         create_disposition = FILE_OPEN;
1388                         break;
1389
1390                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1391                         create_disposition = FILE_OPEN_IF;
1392                         break;
1393
1394                 case OPENX_FILE_EXISTS_TRUNCATE:
1395                         create_disposition = FILE_OVERWRITE;
1396                         break;
1397
1398                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1399                         create_disposition = FILE_OVERWRITE_IF;
1400                         break;
1401
1402                 default:
1403                         /* From samba4 - to be confirmed. */
1404                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1405                                 create_disposition = FILE_CREATE;
1406                                 break;
1407                         }
1408                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1409                                   "open_func 0x%x\n", (unsigned int)open_func));
1410                         return False;
1411         }
1412
1413         /* Create the NT compatible share modes. */
1414         switch (GET_DENY_MODE(deny_mode)) {
1415                 case DENY_ALL:
1416                         share_mode = FILE_SHARE_NONE;
1417                         break;
1418
1419                 case DENY_WRITE:
1420                         share_mode = FILE_SHARE_READ;
1421                         break;
1422
1423                 case DENY_READ:
1424                         share_mode = FILE_SHARE_WRITE;
1425                         break;
1426
1427                 case DENY_NONE:
1428                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1429                         break;
1430
1431                 case DENY_DOS:
1432                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1433                         if (is_executable(smb_fname->base_name)) {
1434                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1435                         } else {
1436                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1437                                         share_mode = FILE_SHARE_READ;
1438                                 } else {
1439                                         share_mode = FILE_SHARE_NONE;
1440                                 }
1441                         }
1442                         break;
1443
1444                 case DENY_FCB:
1445                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1446                         share_mode = FILE_SHARE_NONE;
1447                         break;
1448
1449                 default:
1450                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1451                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1452                         return False;
1453         }
1454
1455         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1456                   "share_mode = 0x%x, create_disposition = 0x%x, "
1457                   "create_options = 0x%x private_flags = 0x%x\n",
1458                   smb_fname_str_dbg(smb_fname),
1459                   (unsigned int)access_mask,
1460                   (unsigned int)share_mode,
1461                   (unsigned int)create_disposition,
1462                   (unsigned int)create_options,
1463                   (unsigned int)private_flags));
1464
1465         if (paccess_mask) {
1466                 *paccess_mask = access_mask;
1467         }
1468         if (pshare_mode) {
1469                 *pshare_mode = share_mode;
1470         }
1471         if (pcreate_disposition) {
1472                 *pcreate_disposition = create_disposition;
1473         }
1474         if (pcreate_options) {
1475                 *pcreate_options = create_options;
1476         }
1477         if (pprivate_flags) {
1478                 *pprivate_flags = private_flags;
1479         }
1480
1481         return True;
1482
1483 }
1484
1485 static void schedule_defer_open(struct share_mode_lock *lck,
1486                                 struct timeval request_time,
1487                                 struct smb_request *req)
1488 {
1489         struct deferred_open_record state;
1490
1491         /* This is a relative time, added to the absolute
1492            request_time value to get the absolute timeout time.
1493            Note that if this is the second or greater time we enter
1494            this codepath for this particular request mid then
1495            request_time is left as the absolute time of the *first*
1496            time this request mid was processed. This is what allows
1497            the request to eventually time out. */
1498
1499         struct timeval timeout;
1500
1501         /* Normally the smbd we asked should respond within
1502          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1503          * the client did, give twice the timeout as a safety
1504          * measure here in case the other smbd is stuck
1505          * somewhere else. */
1506
1507         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1508
1509         /* Nothing actually uses state.delayed_for_oplocks
1510            but it's handy to differentiate in debug messages
1511            between a 30 second delay due to oplock break, and
1512            a 1 second delay for share mode conflicts. */
1513
1514         state.delayed_for_oplocks = True;
1515         state.id = lck->id;
1516
1517         if (!request_timed_out(request_time, timeout)) {
1518                 defer_open(lck, request_time, timeout, req, &state);
1519         }
1520 }
1521
1522 /****************************************************************************
1523  Work out what access_mask to use from what the client sent us.
1524 ****************************************************************************/
1525
1526 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1527                                     const struct smb_filename *smb_fname,
1528                                     bool file_existed,
1529                                     uint32_t access_mask,
1530                                     uint32_t *access_mask_out)
1531 {
1532         NTSTATUS status;
1533         uint32_t orig_access_mask = access_mask;
1534         uint32_t rejected_share_access;
1535
1536         /*
1537          * Convert GENERIC bits to specific bits.
1538          */
1539
1540         se_map_generic(&access_mask, &file_generic_mapping);
1541
1542         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1543         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1544                 if (file_existed) {
1545
1546                         struct security_descriptor *sd;
1547                         uint32_t access_granted = 0;
1548
1549                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1550                                         (SECINFO_OWNER |
1551                                         SECINFO_GROUP |
1552                                         SECINFO_DACL),&sd);
1553
1554                         if (!NT_STATUS_IS_OK(status)) {
1555                                 DEBUG(10,("smbd_calculate_access_mask: "
1556                                         "Could not get acl on file %s: %s\n",
1557                                         smb_fname_str_dbg(smb_fname),
1558                                         nt_errstr(status)));
1559                                 return NT_STATUS_ACCESS_DENIED;
1560                         }
1561
1562                         status = smb1_file_se_access_check(conn,
1563                                         sd,
1564                                         get_current_nttok(conn),
1565                                         access_mask,
1566                                         &access_granted);
1567
1568                         TALLOC_FREE(sd);
1569
1570                         if (!NT_STATUS_IS_OK(status)) {
1571                                 DEBUG(10, ("smbd_calculate_access_mask: "
1572                                         "Access denied on file %s: "
1573                                         "when calculating maximum access\n",
1574                                         smb_fname_str_dbg(smb_fname)));
1575                                 return NT_STATUS_ACCESS_DENIED;
1576                         }
1577
1578                         access_mask = access_granted;
1579                 } else {
1580                         access_mask = FILE_GENERIC_ALL;
1581                 }
1582
1583                 access_mask &= conn->share_access;
1584         }
1585
1586         rejected_share_access = access_mask & ~(conn->share_access);
1587
1588         if (rejected_share_access) {
1589                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1590                         "file %s: rejected by share access mask[0x%08X] "
1591                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1592                         smb_fname_str_dbg(smb_fname),
1593                         conn->share_access,
1594                         orig_access_mask, access_mask,
1595                         rejected_share_access));
1596                 return NT_STATUS_ACCESS_DENIED;
1597         }
1598
1599         *access_mask_out = access_mask;
1600         return NT_STATUS_OK;
1601 }
1602
1603 /****************************************************************************
1604  Remove the deferred open entry under lock.
1605 ****************************************************************************/
1606
1607 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1608                                 struct server_id pid)
1609 {
1610         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1611                         NULL, NULL, NULL);
1612         if (lck == NULL) {
1613                 DEBUG(0, ("could not get share mode lock\n"));
1614         } else {
1615                 del_deferred_open_entry(lck, mid, pid);
1616                 TALLOC_FREE(lck);
1617         }
1618 }
1619
1620 /****************************************************************
1621  Ensure we get the brlock lock followed by the share mode lock
1622  in the correct order to prevent deadlocks if other smbd's are
1623  using the brlock database on this file simultaneously with this open
1624  (that code also gets the locks in brlock -> share mode lock order).
1625 ****************************************************************/
1626
1627 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1628                                 files_struct *fsp,
1629                                 const struct file_id id,
1630                                 const char *connectpath,
1631                                 const struct smb_filename *smb_fname,
1632                                 const struct timespec *p_old_write_time,
1633                                 struct share_mode_lock **p_lck,
1634                                 struct byte_range_lock **p_br_lck)
1635 {
1636         /* Ordering - we must get the br_lck for this
1637            file before the share mode. */
1638         if (lp_locking(fsp->conn->params)) {
1639                 *p_br_lck = brl_get_locks_readonly(fsp);
1640                 if (*p_br_lck == NULL) {
1641                         DEBUG(0, ("Could not get br_lock\n"));
1642                         return false;
1643                 }
1644                 /* Note - we don't need to free the returned
1645                    br_lck explicitly as it was allocated on talloc_tos()
1646                    and so will be autofreed (and release the lock)
1647                    once the frame context disappears.
1648
1649                    If it was set to fsp->brlock_rec then it was
1650                    talloc_move'd to hang off the fsp pointer and
1651                    in this case is guarenteed to not be holding the
1652                    lock on the brlock database. */
1653         }
1654
1655         *p_lck = get_share_mode_lock(mem_ctx,
1656                                 id,
1657                                 connectpath,
1658                                 smb_fname,
1659                                 p_old_write_time);
1660
1661         if (*p_lck == NULL) {
1662                 DEBUG(0, ("Could not get share mode lock\n"));
1663                 TALLOC_FREE(*p_br_lck);
1664                 return false;
1665         }
1666         return true;
1667 }
1668
1669 /****************************************************************************
1670  Open a file with a share mode. Passed in an already created files_struct *.
1671 ****************************************************************************/
1672
1673 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1674                             struct smb_request *req,
1675                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1676                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1677                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1678                             uint32 create_options,      /* options such as delete on close. */
1679                             uint32 new_dos_attributes,  /* attributes used for new file. */
1680                             int oplock_request,         /* internal Samba oplock codes. */
1681                                                         /* Information (FILE_EXISTS etc.) */
1682                             uint32_t private_flags,     /* Samba specific flags. */
1683                             int *pinfo,
1684                             files_struct *fsp)
1685 {
1686         struct smb_filename *smb_fname = fsp->fsp_name;
1687         int flags=0;
1688         int flags2=0;
1689         bool file_existed = VALID_STAT(smb_fname->st);
1690         bool def_acl = False;
1691         bool posix_open = False;
1692         bool new_file_created = False;
1693         bool clear_ads = false;
1694         struct file_id id;
1695         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1696         mode_t new_unx_mode = (mode_t)0;
1697         mode_t unx_mode = (mode_t)0;
1698         int info;
1699         uint32 existing_dos_attributes = 0;
1700         struct timeval request_time = timeval_zero();
1701         struct share_mode_lock *lck = NULL;
1702         uint32 open_access_mask = access_mask;
1703         NTSTATUS status;
1704         char *parent_dir;
1705
1706         ZERO_STRUCT(id);
1707
1708         /* Windows allows a new file to be created and
1709            silently removes a FILE_ATTRIBUTE_DIRECTORY
1710            sent by the client. Do the same. */
1711
1712         new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1713
1714         if (conn->printer) {
1715                 /*
1716                  * Printers are handled completely differently.
1717                  * Most of the passed parameters are ignored.
1718                  */
1719
1720                 if (pinfo) {
1721                         *pinfo = FILE_WAS_CREATED;
1722                 }
1723
1724                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1725                            smb_fname_str_dbg(smb_fname)));
1726
1727                 if (!req) {
1728                         DEBUG(0,("open_file_ntcreate: printer open without "
1729                                 "an SMB request!\n"));
1730                         return NT_STATUS_INTERNAL_ERROR;
1731                 }
1732
1733                 return print_spool_open(fsp, smb_fname->base_name,
1734                                         req->vuid);
1735         }
1736
1737         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1738                             NULL)) {
1739                 return NT_STATUS_NO_MEMORY;
1740         }
1741
1742         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1743                 posix_open = True;
1744                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1745                 new_dos_attributes = 0;
1746         } else {
1747                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1748                  * created new. */
1749                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1750                                      smb_fname, parent_dir);
1751         }
1752
1753         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1754                    "access_mask=0x%x share_access=0x%x "
1755                    "create_disposition = 0x%x create_options=0x%x "
1756                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1757                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1758                    access_mask, share_access, create_disposition,
1759                    create_options, (unsigned int)unx_mode, oplock_request,
1760                    (unsigned int)private_flags));
1761
1762         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1763                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1764                 return NT_STATUS_INTERNAL_ERROR;
1765         }
1766
1767         /*
1768          * Only non-internal opens can be deferred at all
1769          */
1770
1771         if (req) {
1772                 void *ptr;
1773                 if (get_deferred_open_message_state(req,
1774                                 &request_time,
1775                                 &ptr)) {
1776
1777                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1778                         /* Remember the absolute time of the original
1779                            request with this mid. We'll use it later to
1780                            see if this has timed out. */
1781
1782                         /* Remove the deferred open entry under lock. */
1783                         remove_deferred_open_entry(
1784                                 state->id, req->mid,
1785                                 sconn_server_id(req->sconn));
1786
1787                         /* Ensure we don't reprocess this message. */
1788                         remove_deferred_open_message_smb(req->mid);
1789                 }
1790         }
1791
1792         status = check_name(conn, smb_fname->base_name);
1793         if (!NT_STATUS_IS_OK(status)) {
1794                 return status;
1795         }
1796
1797         if (!posix_open) {
1798                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1799                 if (file_existed) {
1800                         existing_dos_attributes = dos_mode(conn, smb_fname);
1801                 }
1802         }
1803
1804         /* ignore any oplock requests if oplocks are disabled */
1805         if (!lp_oplocks(SNUM(conn)) ||
1806             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1807                 /* Mask off everything except the private Samba bits. */
1808                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1809         }
1810
1811         /* this is for OS/2 long file names - say we don't support them */
1812         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1813                 /* OS/2 Workplace shell fix may be main code stream in a later
1814                  * release. */
1815                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1816                          "supported.\n"));
1817                 if (use_nt_status()) {
1818                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1819                 }
1820                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1821         }
1822
1823         switch( create_disposition ) {
1824                 /*
1825                  * Currently we're using FILE_SUPERSEDE as the same as
1826                  * FILE_OVERWRITE_IF but they really are
1827                  * different. FILE_SUPERSEDE deletes an existing file
1828                  * (requiring delete access) then recreates it.
1829                  */
1830                 case FILE_SUPERSEDE:
1831                         /* If file exists replace/overwrite. If file doesn't
1832                          * exist create. */
1833                         flags2 |= (O_CREAT | O_TRUNC);
1834                         clear_ads = true;
1835                         break;
1836
1837                 case FILE_OVERWRITE_IF:
1838                         /* If file exists replace/overwrite. If file doesn't
1839                          * exist create. */
1840                         flags2 |= (O_CREAT | O_TRUNC);
1841                         clear_ads = true;
1842                         break;
1843
1844                 case FILE_OPEN:
1845                         /* If file exists open. If file doesn't exist error. */
1846                         if (!file_existed) {
1847                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1848                                          "requested for file %s and file "
1849                                          "doesn't exist.\n",
1850                                          smb_fname_str_dbg(smb_fname)));
1851                                 errno = ENOENT;
1852                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1853                         }
1854                         break;
1855
1856                 case FILE_OVERWRITE:
1857                         /* If file exists overwrite. If file doesn't exist
1858                          * error. */
1859                         if (!file_existed) {
1860                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1861                                          "requested for file %s and file "
1862                                          "doesn't exist.\n",
1863                                          smb_fname_str_dbg(smb_fname) ));
1864                                 errno = ENOENT;
1865                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1866                         }
1867                         flags2 |= O_TRUNC;
1868                         clear_ads = true;
1869                         break;
1870
1871                 case FILE_CREATE:
1872                         /* If file exists error. If file doesn't exist
1873                          * create. */
1874                         if (file_existed) {
1875                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1876                                          "requested for file %s and file "
1877                                          "already exists.\n",
1878                                          smb_fname_str_dbg(smb_fname)));
1879                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1880                                         errno = EISDIR;
1881                                 } else {
1882                                         errno = EEXIST;
1883                                 }
1884                                 return map_nt_error_from_unix(errno);
1885                         }
1886                         flags2 |= (O_CREAT|O_EXCL);
1887                         break;
1888
1889                 case FILE_OPEN_IF:
1890                         /* If file exists open. If file doesn't exist
1891                          * create. */
1892                         flags2 |= O_CREAT;
1893                         break;
1894
1895                 default:
1896                         return NT_STATUS_INVALID_PARAMETER;
1897         }
1898
1899         /* We only care about matching attributes on file exists and
1900          * overwrite. */
1901
1902         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1903                              (create_disposition == FILE_OVERWRITE_IF))) {
1904                 if (!open_match_attributes(conn, existing_dos_attributes,
1905                                            new_dos_attributes,
1906                                            smb_fname->st.st_ex_mode,
1907                                            unx_mode, &new_unx_mode)) {
1908                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1909                                  "for file %s (%x %x) (0%o, 0%o)\n",
1910                                  smb_fname_str_dbg(smb_fname),
1911                                  existing_dos_attributes,
1912                                  new_dos_attributes,
1913                                  (unsigned int)smb_fname->st.st_ex_mode,
1914                                  (unsigned int)unx_mode ));
1915                         errno = EACCES;
1916                         return NT_STATUS_ACCESS_DENIED;
1917                 }
1918         }
1919
1920         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1921                                         access_mask,
1922                                         &access_mask);
1923         if (!NT_STATUS_IS_OK(status)) {
1924                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1925                         "on file %s returned %s\n",
1926                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1927                 return status;
1928         }
1929
1930         open_access_mask = access_mask;
1931
1932         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1933                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1934         }
1935
1936         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1937                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1938                     access_mask));
1939
1940         /*
1941          * Note that we ignore the append flag as append does not
1942          * mean the same thing under DOS and Unix.
1943          */
1944
1945         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1946                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1947                 /* DENY_DOS opens are always underlying read-write on the
1948                    file handle, no matter what the requested access mask
1949                     says. */
1950                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1951                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1952                         flags = O_RDWR;
1953                 } else {
1954                         flags = O_WRONLY;
1955                 }
1956         } else {
1957                 flags = O_RDONLY;
1958         }
1959
1960         /*
1961          * Currently we only look at FILE_WRITE_THROUGH for create options.
1962          */
1963
1964 #if defined(O_SYNC)
1965         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1966                 flags2 |= O_SYNC;
1967         }
1968 #endif /* O_SYNC */
1969
1970         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1971                 flags2 |= O_APPEND;
1972         }
1973
1974         if (!posix_open && !CAN_WRITE(conn)) {
1975                 /*
1976                  * We should really return a permission denied error if either
1977                  * O_CREAT or O_TRUNC are set, but for compatibility with
1978                  * older versions of Samba we just AND them out.
1979                  */
1980                 flags2 &= ~(O_CREAT|O_TRUNC);
1981         }
1982
1983         /*
1984          * Ensure we can't write on a read-only share or file.
1985          */
1986
1987         if (flags != O_RDONLY && file_existed &&
1988             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1989                 DEBUG(5,("open_file_ntcreate: write access requested for "
1990                          "file %s on read only %s\n",
1991                          smb_fname_str_dbg(smb_fname),
1992                          !CAN_WRITE(conn) ? "share" : "file" ));
1993                 errno = EACCES;
1994                 return NT_STATUS_ACCESS_DENIED;
1995         }
1996
1997         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1998         fsp->share_access = share_access;
1999         fsp->fh->private_options = private_flags;
2000         fsp->access_mask = open_access_mask; /* We change this to the
2001                                               * requested access_mask after
2002                                               * the open is done. */
2003         fsp->posix_open = posix_open;
2004
2005         /* Ensure no SAMBA_PRIVATE bits can be set. */
2006         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2007
2008         if (timeval_is_zero(&request_time)) {
2009                 request_time = fsp->open_time;
2010         }
2011
2012         if (file_existed) {
2013                 struct byte_range_lock *br_lck = NULL;
2014                 struct share_mode_entry *batch_entry = NULL;
2015                 struct share_mode_entry *exclusive_entry = NULL;
2016                 bool got_level2_oplock = false;
2017                 bool got_a_none_oplock = false;
2018
2019                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2020                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2021
2022                 if (!acquire_ordered_locks(talloc_tos(),
2023                                         fsp,
2024                                         id,
2025                                         conn->connectpath,
2026                                         smb_fname,
2027                                         &old_write_time,
2028                                         &lck,
2029                                         &br_lck)) {
2030                         return NT_STATUS_SHARING_VIOLATION;
2031                 }
2032
2033                 /* Get the types we need to examine. */
2034                 find_oplock_types(fsp,
2035                                 oplock_request,
2036                                 lck,
2037                                 &batch_entry,
2038                                 &exclusive_entry,
2039                                 &got_level2_oplock,
2040                                 &got_a_none_oplock);
2041
2042                 /* First pass - send break only on batch oplocks. */
2043                 if ((req != NULL) &&
2044                                 delay_for_batch_oplocks(fsp,
2045                                         req->mid,
2046                                         oplock_request,
2047                                         batch_entry)) {
2048                         schedule_defer_open(lck, request_time, req);
2049                         TALLOC_FREE(lck);
2050                         return NT_STATUS_SHARING_VIOLATION;
2051                 }
2052
2053                 /* Use the client requested access mask here, not the one we
2054                  * open with. */
2055                 status = open_mode_check(conn, lck, fsp->name_hash,
2056                                         access_mask, share_access,
2057                                          create_options, &file_existed);
2058
2059                 if (NT_STATUS_IS_OK(status)) {
2060                         /* We might be going to allow this open. Check oplock
2061                          * status again. */
2062                         /* Second pass - send break for both batch or
2063                          * exclusive oplocks. */
2064                         if ((req != NULL) &&
2065                                         delay_for_exclusive_oplocks(
2066                                                 fsp,
2067                                                 req->mid,
2068                                                 oplock_request,
2069                                                 exclusive_entry)) {
2070                                 schedule_defer_open(lck, request_time, req);
2071                                 TALLOC_FREE(lck);
2072                                 return NT_STATUS_SHARING_VIOLATION;
2073                         }
2074                 }
2075
2076                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2077                         /* DELETE_PENDING is not deferred for a second */
2078                         TALLOC_FREE(lck);
2079                         return status;
2080                 }
2081
2082                 grant_fsp_oplock_type(fsp,
2083                                 br_lck,
2084                                 oplock_request,
2085                                 got_level2_oplock,
2086                                 got_a_none_oplock);
2087
2088                 if (!NT_STATUS_IS_OK(status)) {
2089                         uint32 can_access_mask;
2090                         bool can_access = True;
2091
2092                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2093
2094                         /* Check if this can be done with the deny_dos and fcb
2095                          * calls. */
2096                         if (private_flags &
2097                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2098                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2099                                 if (req == NULL) {
2100                                         DEBUG(0, ("DOS open without an SMB "
2101                                                   "request!\n"));
2102                                         TALLOC_FREE(lck);
2103                                         return NT_STATUS_INTERNAL_ERROR;
2104                                 }
2105
2106                                 /* Use the client requested access mask here,
2107                                  * not the one we open with. */
2108                                 status = fcb_or_dos_open(req,
2109                                                         conn,
2110                                                         fsp,
2111                                                         smb_fname,
2112                                                         id,
2113                                                         req->smbpid,
2114                                                         req->vuid,
2115                                                         access_mask,
2116                                                         share_access,
2117                                                         create_options);
2118
2119                                 if (NT_STATUS_IS_OK(status)) {
2120                                         TALLOC_FREE(lck);
2121                                         if (pinfo) {
2122                                                 *pinfo = FILE_WAS_OPENED;
2123                                         }
2124                                         return NT_STATUS_OK;
2125                                 }
2126                         }
2127
2128                         /*
2129                          * This next line is a subtlety we need for
2130                          * MS-Access. If a file open will fail due to share
2131                          * permissions and also for security (access) reasons,
2132                          * we need to return the access failed error, not the
2133                          * share error. We can't open the file due to kernel
2134                          * oplock deadlock (it's possible we failed above on
2135                          * the open_mode_check()) so use a userspace check.
2136                          */
2137
2138                         if (flags & O_RDWR) {
2139                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2140                         } else if (flags & O_WRONLY) {
2141                                 can_access_mask = FILE_WRITE_DATA;
2142                         } else {
2143                                 can_access_mask = FILE_READ_DATA;
2144                         }
2145
2146                         if (((can_access_mask & FILE_WRITE_DATA) &&
2147                                 !CAN_WRITE(conn)) ||
2148                             !can_access_file_data(conn, smb_fname,
2149                                                   can_access_mask)) {
2150                                 can_access = False;
2151                         }
2152
2153                         /*
2154                          * If we're returning a share violation, ensure we
2155                          * cope with the braindead 1 second delay.
2156                          */
2157
2158                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2159                             lp_defer_sharing_violations()) {
2160                                 struct timeval timeout;
2161                                 struct deferred_open_record state;
2162                                 int timeout_usecs;
2163
2164                                 /* this is a hack to speed up torture tests
2165                                    in 'make test' */
2166                                 timeout_usecs = lp_parm_int(SNUM(conn),
2167                                                             "smbd","sharedelay",
2168                                                             SHARING_VIOLATION_USEC_WAIT);
2169
2170                                 /* This is a relative time, added to the absolute
2171                                    request_time value to get the absolute timeout time.
2172                                    Note that if this is the second or greater time we enter
2173                                    this codepath for this particular request mid then
2174                                    request_time is left as the absolute time of the *first*
2175                                    time this request mid was processed. This is what allows
2176                                    the request to eventually time out. */
2177
2178                                 timeout = timeval_set(0, timeout_usecs);
2179
2180                                 /* Nothing actually uses state.delayed_for_oplocks
2181                                    but it's handy to differentiate in debug messages
2182                                    between a 30 second delay due to oplock break, and
2183                                    a 1 second delay for share mode conflicts. */
2184
2185                                 state.delayed_for_oplocks = False;
2186                                 state.id = id;
2187
2188                                 if ((req != NULL)
2189                                     && !request_timed_out(request_time,
2190                                                           timeout)) {
2191                                         defer_open(lck, request_time, timeout,
2192                                                    req, &state);
2193                                 }
2194                         }
2195
2196                         TALLOC_FREE(lck);
2197                         if (can_access) {
2198                                 /*
2199                                  * We have detected a sharing violation here
2200                                  * so return the correct error code
2201                                  */
2202                                 status = NT_STATUS_SHARING_VIOLATION;
2203                         } else {
2204                                 status = NT_STATUS_ACCESS_DENIED;
2205                         }
2206                         return status;
2207                 }
2208
2209                 /*
2210                  * We exit this block with the share entry *locked*.....
2211                  */
2212         }
2213
2214         SMB_ASSERT(!file_existed || (lck != NULL));
2215
2216         /*
2217          * Ensure we pay attention to default ACLs on directories if required.
2218          */
2219
2220         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2221             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2222                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2223         }
2224
2225         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2226                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2227                  (unsigned int)flags, (unsigned int)flags2,
2228                  (unsigned int)unx_mode, (unsigned int)access_mask,
2229                  (unsigned int)open_access_mask));
2230
2231         /*
2232          * open_file strips any O_TRUNC flags itself.
2233          */
2234
2235         fsp_open = open_file(fsp, conn, req, parent_dir,
2236                              flags|flags2, unx_mode, access_mask,
2237                              open_access_mask);
2238
2239         if (!NT_STATUS_IS_OK(fsp_open)) {
2240                 TALLOC_FREE(lck);
2241                 return fsp_open;
2242         }
2243
2244         if (!file_existed) {
2245                 struct byte_range_lock *br_lck = NULL;
2246                 struct share_mode_entry *batch_entry = NULL;
2247                 struct share_mode_entry *exclusive_entry = NULL;
2248                 bool got_level2_oplock = false;
2249                 bool got_a_none_oplock = false;
2250                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2251                 /*
2252                  * Deal with the race condition where two smbd's detect the
2253                  * file doesn't exist and do the create at the same time. One
2254                  * of them will win and set a share mode, the other (ie. this
2255                  * one) should check if the requested share mode for this
2256                  * create is allowed.
2257                  */
2258
2259                 /*
2260                  * Now the file exists and fsp is successfully opened,
2261                  * fsp->dev and fsp->inode are valid and should replace the
2262                  * dev=0,inode=0 from a non existent file. Spotted by
2263                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2264                  */
2265
2266                 id = fsp->file_id;
2267
2268                 if (!acquire_ordered_locks(talloc_tos(),
2269                                         fsp,
2270                                         id,
2271                                         conn->connectpath,
2272                                         smb_fname,
2273                                         &old_write_time,
2274                                         &lck,
2275                                         &br_lck)) {
2276                         return NT_STATUS_SHARING_VIOLATION;
2277                 }
2278
2279                 /* Get the types we need to examine. */
2280                 find_oplock_types(fsp,
2281                                 oplock_request,
2282                                 lck,
2283                                 &batch_entry,
2284                                 &exclusive_entry,
2285                                 &got_level2_oplock,
2286                                 &got_a_none_oplock);
2287
2288                 /* First pass - send break only on batch oplocks. */
2289                 if ((req != NULL) &&
2290                                 delay_for_batch_oplocks(fsp,
2291                                         req->mid,
2292                                         oplock_request,
2293                                         batch_entry)) {
2294                         schedule_defer_open(lck, request_time, req);
2295                         TALLOC_FREE(lck);
2296                         fd_close(fsp);
2297                         return NT_STATUS_SHARING_VIOLATION;
2298                 }
2299
2300                 status = open_mode_check(conn, lck, fsp->name_hash,
2301                                         access_mask, share_access,
2302                                          create_options, &file_existed);
2303
2304                 if (NT_STATUS_IS_OK(status)) {
2305                         /* We might be going to allow this open. Check oplock
2306                          * status again. */
2307                         /* Second pass - send break for both batch or
2308                          * exclusive oplocks. */
2309                         if ((req != NULL) &&
2310                                         delay_for_exclusive_oplocks(
2311                                                 fsp,
2312                                                 req->mid,
2313                                                 oplock_request,
2314                                                 exclusive_entry)) {
2315                                 schedule_defer_open(lck, request_time, req);
2316                                 TALLOC_FREE(lck);
2317                                 fd_close(fsp);
2318                                 return NT_STATUS_SHARING_VIOLATION;
2319                         }
2320                 }
2321
2322                 if (!NT_STATUS_IS_OK(status)) {
2323                         struct deferred_open_record state;
2324
2325                         state.delayed_for_oplocks = False;
2326                         state.id = id;
2327
2328                         /* Do it all over again immediately. In the second
2329                          * round we will find that the file existed and handle
2330                          * the DELETE_PENDING and FCB cases correctly. No need
2331                          * to duplicate the code here. Essentially this is a
2332                          * "goto top of this function", but don't tell
2333                          * anybody... */
2334
2335                         if (req != NULL) {
2336                                 defer_open(lck, request_time, timeval_zero(),
2337                                            req, &state);
2338                         }
2339                         TALLOC_FREE(lck);
2340                         fd_close(fsp);
2341                         return status;
2342                 }
2343
2344                 grant_fsp_oplock_type(fsp,
2345                                 br_lck,
2346                                 oplock_request,
2347                                 got_level2_oplock,
2348                                 got_a_none_oplock);
2349
2350                 /*
2351                  * We exit this block with the share entry *locked*.....
2352                  */
2353
2354         }
2355
2356         SMB_ASSERT(lck != NULL);
2357
2358         /* Delete streams if create_disposition requires it */
2359         if (file_existed && clear_ads &&
2360             !is_ntfs_stream_smb_fname(smb_fname)) {
2361                 status = delete_all_streams(conn, smb_fname->base_name);
2362                 if (!NT_STATUS_IS_OK(status)) {
2363                         TALLOC_FREE(lck);
2364                         fd_close(fsp);
2365                         return status;
2366                 }
2367         }
2368
2369         /* note that we ignore failure for the following. It is
2370            basically a hack for NFS, and NFS will never set one of
2371            these only read them. Nobody but Samba can ever set a deny
2372            mode and we have already checked our more authoritative
2373            locking database for permission to set this deny mode. If
2374            the kernel refuses the operations then the kernel is wrong.
2375            note that GPFS supports it as well - jmcd */
2376
2377         if (fsp->fh->fd != -1) {
2378                 int ret_flock;
2379                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2380                 if(ret_flock == -1 ){
2381
2382                         TALLOC_FREE(lck);
2383                         fd_close(fsp);
2384
2385                         return NT_STATUS_SHARING_VIOLATION;
2386                 }
2387         }
2388
2389         /*
2390          * At this point onwards, we can guarentee that the share entry
2391          * is locked, whether we created the file or not, and that the
2392          * deny mode is compatible with all current opens.
2393          */
2394
2395         /*
2396          * If requested, truncate the file.
2397          */
2398
2399         if (file_existed && (flags2&O_TRUNC)) {
2400                 /*
2401                  * We are modifing the file after open - update the stat
2402                  * struct..
2403                  */
2404                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2405                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2406                         status = map_nt_error_from_unix(errno);
2407                         TALLOC_FREE(lck);
2408                         fd_close(fsp);
2409                         return status;
2410                 }
2411         }
2412
2413         /*
2414          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2415          * but we don't have to store this - just ignore it on access check.
2416          */
2417         if (conn->sconn->using_smb2) {
2418                 /*
2419                  * SMB2 doesn't return it (according to Microsoft tests).
2420                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2421                  * File created with access = 0x7 (Read, Write, Delete)
2422                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2423                  */
2424                 fsp->access_mask = access_mask;
2425         } else {
2426                 /* But SMB1 does. */
2427                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2428         }
2429
2430         if (file_existed) {
2431                 /* stat opens on existing files don't get oplocks. */
2432                 if (is_stat_open(open_access_mask)) {
2433                         fsp->oplock_type = NO_OPLOCK;
2434                 }
2435
2436                 if (!(flags2 & O_TRUNC)) {
2437                         info = FILE_WAS_OPENED;
2438                 } else {
2439                         info = FILE_WAS_OVERWRITTEN;
2440                 }
2441         } else {
2442                 info = FILE_WAS_CREATED;
2443         }
2444
2445         if (pinfo) {
2446                 *pinfo = info;
2447         }
2448
2449         /*
2450          * Setup the oplock info in both the shared memory and
2451          * file structs.
2452          */
2453
2454         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2455                 /*
2456                  * Could not get the kernel oplock or there are byte-range
2457                  * locks on the file.
2458                  */
2459                 fsp->oplock_type = NO_OPLOCK;
2460         }
2461
2462         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2463                 new_file_created = True;
2464         }
2465
2466         set_share_mode(lck, fsp, get_current_uid(conn),
2467                         req ? req->mid : 0,
2468                        fsp->oplock_type);
2469
2470         /* Handle strange delete on close create semantics. */
2471         if (create_options & FILE_DELETE_ON_CLOSE) {
2472
2473                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2474
2475                 if (!NT_STATUS_IS_OK(status)) {
2476                         /* Remember to delete the mode we just added. */
2477                         del_share_mode(lck, fsp);
2478                         TALLOC_FREE(lck);
2479                         fd_close(fsp);
2480                         return status;
2481                 }
2482                 /* Note that here we set the *inital* delete on close flag,
2483                    not the regular one. The magic gets handled in close. */
2484                 fsp->initial_delete_on_close = True;
2485         }
2486
2487         if (new_file_created) {
2488                 /* Files should be initially set as archive */
2489                 if (lp_map_archive(SNUM(conn)) ||
2490                     lp_store_dos_attributes(SNUM(conn))) {
2491                         if (!posix_open) {
2492                                 if (file_set_dosmode(conn, smb_fname,
2493                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2494                                             parent_dir, true) == 0) {
2495                                         unx_mode = smb_fname->st.st_ex_mode;
2496                                 }
2497                         }
2498                 }
2499         }
2500
2501         /* Determine sparse flag. */
2502         if (posix_open) {
2503                 /* POSIX opens are sparse by default. */
2504                 fsp->is_sparse = true;
2505         } else {
2506                 fsp->is_sparse = (file_existed &&
2507                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2508         }
2509
2510         /*
2511          * Take care of inherited ACLs on created files - if default ACL not
2512          * selected.
2513          */
2514
2515         if (!posix_open && !file_existed && !def_acl) {
2516
2517                 int saved_errno = errno; /* We might get ENOSYS in the next
2518                                           * call.. */
2519
2520                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2521                     errno == ENOSYS) {
2522                         errno = saved_errno; /* Ignore ENOSYS */
2523                 }
2524
2525         } else if (new_unx_mode) {
2526
2527                 int ret = -1;
2528
2529                 /* Attributes need changing. File already existed. */
2530
2531                 {
2532                         int saved_errno = errno; /* We might get ENOSYS in the
2533                                                   * next call.. */
2534                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2535
2536                         if (ret == -1 && errno == ENOSYS) {
2537                                 errno = saved_errno; /* Ignore ENOSYS */
2538                         } else {
2539                                 DEBUG(5, ("open_file_ntcreate: reset "
2540                                           "attributes of file %s to 0%o\n",
2541                                           smb_fname_str_dbg(smb_fname),
2542                                           (unsigned int)new_unx_mode));
2543                                 ret = 0; /* Don't do the fchmod below. */
2544                         }
2545                 }
2546
2547                 if ((ret == -1) &&
2548                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2549                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2550                                   "attributes of file %s to 0%o\n",
2551                                   smb_fname_str_dbg(smb_fname),
2552                                   (unsigned int)new_unx_mode));
2553         }
2554
2555         /* If this is a successful open, we must remove any deferred open
2556          * records. */
2557         if (req != NULL) {
2558                 del_deferred_open_entry(lck, req->mid,
2559                                         sconn_server_id(req->sconn));
2560         }
2561         TALLOC_FREE(lck);
2562
2563         return NT_STATUS_OK;
2564 }
2565
2566
2567 /****************************************************************************
2568  Open a file for for write to ensure that we can fchmod it.
2569 ****************************************************************************/
2570
2571 NTSTATUS open_file_fchmod(connection_struct *conn,
2572                           struct smb_filename *smb_fname,
2573                           files_struct **result)
2574 {
2575         if (!VALID_STAT(smb_fname->st)) {
2576                 return NT_STATUS_INVALID_PARAMETER;
2577         }
2578
2579         return SMB_VFS_CREATE_FILE(
2580                 conn,                                   /* conn */
2581                 NULL,                                   /* req */
2582                 0,                                      /* root_dir_fid */
2583                 smb_fname,                              /* fname */
2584                 FILE_WRITE_DATA,                        /* access_mask */
2585                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2586                     FILE_SHARE_DELETE),
2587                 FILE_OPEN,                              /* create_disposition*/
2588                 0,                                      /* create_options */
2589                 0,                                      /* file_attributes */
2590                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2591                 0,                                      /* allocation_size */
2592                 0,                                      /* private_flags */
2593                 NULL,                                   /* sd */
2594                 NULL,                                   /* ea_list */
2595                 result,                                 /* result */
2596                 NULL);                                  /* pinfo */
2597 }
2598
2599 static NTSTATUS mkdir_internal(connection_struct *conn,
2600                                struct smb_filename *smb_dname,
2601                                uint32 file_attributes)
2602 {
2603         mode_t mode;
2604         char *parent_dir;
2605         NTSTATUS status;
2606         bool posix_open = false;
2607         bool need_re_stat = false;
2608
2609         if(!CAN_WRITE(conn)) {
2610                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2611                          "%s\n", lp_servicename(SNUM(conn))));
2612                 return NT_STATUS_ACCESS_DENIED;
2613         }
2614
2615         status = check_name(conn, smb_dname->base_name);
2616         if (!NT_STATUS_IS_OK(status)) {
2617                 return status;
2618         }
2619
2620         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2621                             NULL)) {
2622                 return NT_STATUS_NO_MEMORY;
2623         }
2624
2625         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2626                 posix_open = true;
2627                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2628         } else {
2629                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2630         }
2631
2632         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2633                 return map_nt_error_from_unix(errno);
2634         }
2635
2636         /* Ensure we're checking for a symlink here.... */
2637         /* We don't want to get caught by a symlink racer. */
2638
2639         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2640                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2641                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2642                 return map_nt_error_from_unix(errno);
2643         }
2644
2645         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2646                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2647                           smb_fname_str_dbg(smb_dname)));
2648                 return NT_STATUS_ACCESS_DENIED;
2649         }
2650
2651         if (lp_store_dos_attributes(SNUM(conn))) {
2652                 if (!posix_open) {
2653                         file_set_dosmode(conn, smb_dname,
2654                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2655                                          parent_dir, true);
2656                 }
2657         }
2658
2659         if (lp_inherit_perms(SNUM(conn))) {
2660                 inherit_access_posix_acl(conn, parent_dir,
2661                                          smb_dname->base_name, mode);
2662                 need_re_stat = true;
2663         }
2664
2665         if (!posix_open) {
2666                 /*
2667                  * Check if high bits should have been set,
2668                  * then (if bits are missing): add them.
2669                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2670                  * dir.
2671                  */
2672                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2673                     (mode & ~smb_dname->st.st_ex_mode)) {
2674                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2675                                       (smb_dname->st.st_ex_mode |
2676                                           (mode & ~smb_dname->st.st_ex_mode)));
2677                         need_re_stat = true;
2678                 }
2679         }
2680
2681         /* Change the owner if required. */
2682         if (lp_inherit_owner(SNUM(conn))) {
2683                 change_dir_owner_to_parent(conn, parent_dir,
2684                                            smb_dname->base_name,
2685                                            &smb_dname->st);
2686                 need_re_stat = true;
2687         }
2688
2689         if (need_re_stat) {
2690                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2691                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2692                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2693                         return map_nt_error_from_unix(errno);
2694                 }
2695         }
2696
2697         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2698                      smb_dname->base_name);
2699
2700         return NT_STATUS_OK;
2701 }
2702
2703 /****************************************************************************
2704  Ensure we didn't get symlink raced on opening a directory.
2705 ****************************************************************************/
2706
2707 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2708                         const SMB_STRUCT_STAT *sbuf2)
2709 {
2710         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2711                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2712                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2713                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2714                 return false;
2715         }
2716         return true;
2717 }
2718
2719 /****************************************************************************
2720  Open a directory from an NT SMB call.
2721 ****************************************************************************/
2722
2723 static NTSTATUS open_directory(connection_struct *conn,
2724                                struct smb_request *req,
2725                                struct smb_filename *smb_dname,
2726                                uint32 access_mask,
2727                                uint32 share_access,
2728                                uint32 create_disposition,
2729                                uint32 create_options,
2730                                uint32 file_attributes,
2731                                int *pinfo,
2732                                files_struct **result)
2733 {
2734         files_struct *fsp = NULL;
2735         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2736         struct share_mode_lock *lck = NULL;
2737         NTSTATUS status;
2738         struct timespec mtimespec;
2739         int info = 0;
2740
2741         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2742
2743         /* Ensure we have a directory attribute. */
2744         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2745
2746         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2747                  "share_access = 0x%x create_options = 0x%x, "
2748                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2749                  smb_fname_str_dbg(smb_dname),
2750                  (unsigned int)access_mask,
2751                  (unsigned int)share_access,
2752                  (unsigned int)create_options,
2753                  (unsigned int)create_disposition,
2754                  (unsigned int)file_attributes));
2755
2756         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2757                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2758                         is_ntfs_stream_smb_fname(smb_dname)) {
2759                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2760                           smb_fname_str_dbg(smb_dname)));
2761                 return NT_STATUS_NOT_A_DIRECTORY;
2762         }
2763
2764         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2765                                             access_mask, &access_mask);
2766         if (!NT_STATUS_IS_OK(status)) {
2767                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2768                         "on file %s returned %s\n",
2769                         smb_fname_str_dbg(smb_dname),
2770                         nt_errstr(status)));
2771                 return status;
2772         }
2773
2774         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2775                         !security_token_has_privilege(get_current_nttok(conn),
2776                                         SEC_PRIV_SECURITY)) {
2777                 DEBUG(10, ("open_directory: open on %s "
2778                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2779                         smb_fname_str_dbg(smb_dname)));
2780                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2781         }
2782
2783         switch( create_disposition ) {
2784                 case FILE_OPEN:
2785
2786                         if (!dir_existed) {
2787                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2788                         }
2789
2790                         info = FILE_WAS_OPENED;
2791                         break;
2792
2793                 case FILE_CREATE:
2794
2795                         /* If directory exists error. If directory doesn't
2796                          * exist create. */
2797
2798                         status = mkdir_internal(conn, smb_dname,
2799                                                 file_attributes);
2800
2801                         if (!NT_STATUS_IS_OK(status)) {
2802                                 DEBUG(2, ("open_directory: unable to create "
2803                                           "%s. Error was %s\n",
2804                                           smb_fname_str_dbg(smb_dname),
2805                                           nt_errstr(status)));
2806                                 return status;
2807                         }
2808
2809                         info = FILE_WAS_CREATED;
2810                         break;
2811
2812                 case FILE_OPEN_IF:
2813                         /*
2814                          * If directory exists open. If directory doesn't
2815                          * exist create.
2816                          */
2817
2818                         status = mkdir_internal(conn, smb_dname,
2819                                                 file_attributes);
2820
2821                         if (NT_STATUS_IS_OK(status)) {
2822                                 info = FILE_WAS_CREATED;
2823                         }
2824
2825                         if (NT_STATUS_EQUAL(status,
2826                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2827                                 info = FILE_WAS_OPENED;
2828                                 status = NT_STATUS_OK;
2829                         }
2830                         break;
2831
2832                 case FILE_SUPERSEDE:
2833                 case FILE_OVERWRITE:
2834                 case FILE_OVERWRITE_IF:
2835                 default:
2836                         DEBUG(5,("open_directory: invalid create_disposition "
2837                                  "0x%x for directory %s\n",
2838                                  (unsigned int)create_disposition,
2839                                  smb_fname_str_dbg(smb_dname)));
2840                         return NT_STATUS_INVALID_PARAMETER;
2841         }
2842
2843         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2844                 DEBUG(5,("open_directory: %s is not a directory !\n",
2845                          smb_fname_str_dbg(smb_dname)));
2846                 return NT_STATUS_NOT_A_DIRECTORY;
2847         }
2848
2849         if (info == FILE_WAS_OPENED) {
2850                 uint32_t access_granted = 0;
2851                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2852                                                 &access_granted);
2853
2854                 /* Were we trying to do a directory open
2855                  * for delete and didn't get DELETE
2856                  * access (only) ? Check if the
2857                  * directory allows DELETE_CHILD.
2858                  * See here:
2859                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2860                  * for details. */
2861
2862                 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2863                         (access_mask & DELETE_ACCESS) &&
2864                         (access_granted == DELETE_ACCESS) &&
2865                         can_delete_file_in_directory(conn, smb_dname))) {
2866                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2867                                 "on directory %s\n",
2868                                 smb_fname_str_dbg(smb_dname)));
2869                         status = NT_STATUS_OK;
2870                 }
2871
2872                 if (!NT_STATUS_IS_OK(status)) {
2873                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2874                                 "file %s failed with %s\n",
2875                                 smb_fname_str_dbg(smb_dname),
2876                                 nt_errstr(status)));
2877                         return status;
2878                 }
2879         }
2880
2881         status = file_new(req, conn, &fsp);
2882         if(!NT_STATUS_IS_OK(status)) {
2883                 return status;
2884         }
2885
2886         /*
2887          * Setup the files_struct for it.
2888          */
2889
2890         fsp->mode = smb_dname->st.st_ex_mode;
2891         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2892         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2893         fsp->file_pid = req ? req->smbpid : 0;
2894         fsp->can_lock = False;
2895         fsp->can_read = False;
2896         fsp->can_write = False;
2897
2898         fsp->share_access = share_access;
2899         fsp->fh->private_options = 0;
2900         /*
2901          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2902          */
2903         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2904         fsp->print_file = NULL;
2905         fsp->modified = False;
2906         fsp->oplock_type = NO_OPLOCK;
2907         fsp->sent_oplock_break = NO_BREAK_SENT;
2908         fsp->is_directory = True;
2909         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2910         status = fsp_set_smb_fname(fsp, smb_dname);
2911         if (!NT_STATUS_IS_OK(status)) {
2912                 file_free(req, fsp);
2913                 return status;
2914         }
2915
2916         mtimespec = smb_dname->st.st_ex_mtime;
2917
2918 #ifdef O_DIRECTORY
2919         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2920 #else
2921         /* POSIX allows us to open a directory with O_RDONLY. */
2922         status = fd_open(conn, fsp, O_RDONLY, 0);
2923 #endif
2924         if (!NT_STATUS_IS_OK(status)) {
2925                 DEBUG(5, ("open_directory: Could not open fd for "
2926                         "%s (%s)\n",
2927                         smb_fname_str_dbg(smb_dname),
2928                         nt_errstr(status)));
2929                 file_free(req, fsp);
2930                 return status;
2931         }
2932
2933         status = vfs_stat_fsp(fsp);
2934         if (!NT_STATUS_IS_OK(status)) {
2935                 fd_close(fsp);
2936                 file_free(req, fsp);
2937                 return status;
2938         }
2939
2940         /* Ensure there was no race condition. */
2941         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2942                 DEBUG(5,("open_directory: stat struct differs for "
2943                         "directory %s.\n",
2944                         smb_fname_str_dbg(smb_dname)));
2945                 fd_close(fsp);
2946                 file_free(req, fsp);
2947                 return NT_STATUS_ACCESS_DENIED;
2948         }
2949
2950         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2951                                   conn->connectpath, smb_dname, &mtimespec);
2952
2953         if (lck == NULL) {
2954                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2955                           "%s\n", smb_fname_str_dbg(smb_dname)));
2956                 fd_close(fsp);
2957                 file_free(req, fsp);
2958                 return NT_STATUS_SHARING_VIOLATION;
2959         }
2960
2961         status = open_mode_check(conn, lck, fsp->name_hash,
2962                                 access_mask, share_access,
2963                                  create_options, &dir_existed);
2964
2965         if (!NT_STATUS_IS_OK(status)) {
2966                 TALLOC_FREE(lck);
2967                 fd_close(fsp);
2968                 file_free(req, fsp);
2969                 return status;
2970         }
2971
2972         set_share_mode(lck, fsp, get_current_uid(conn),
2973                         req ? req->mid : 0, NO_OPLOCK);
2974
2975         /* For directories the delete on close bit at open time seems
2976            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2977         if (create_options & FILE_DELETE_ON_CLOSE) {
2978                 status = can_set_delete_on_close(fsp, 0);
2979                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2980                         TALLOC_FREE(lck);
2981                         fd_close(fsp);
2982                         file_free(req, fsp);
2983                         return status;
2984                 }
2985
2986                 if (NT_STATUS_IS_OK(status)) {
2987                         /* Note that here we set the *inital* delete on close flag,
2988                            not the regular one. The magic gets handled in close. */
2989                         fsp->initial_delete_on_close = True;
2990                 }
2991         }
2992
2993         TALLOC_FREE(lck);
2994
2995         if (pinfo) {
2996                 *pinfo = info;
2997         }
2998
2999         *result = fsp;
3000         return NT_STATUS_OK;
3001 }
3002
3003 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3004                           struct smb_filename *smb_dname)
3005 {
3006         NTSTATUS status;
3007         files_struct *fsp;
3008
3009         status = SMB_VFS_CREATE_FILE(
3010                 conn,                                   /* conn */
3011                 req,                                    /* req */
3012                 0,                                      /* root_dir_fid */
3013                 smb_dname,                              /* fname */
3014                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3015                 FILE_SHARE_NONE,                        /* share_access */
3016                 FILE_CREATE,                            /* create_disposition*/
3017                 FILE_DIRECTORY_FILE,                    /* create_options */
3018                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3019                 0,                                      /* oplock_request */
3020                 0,                                      /* allocation_size */
3021                 0,                                      /* private_flags */
3022                 NULL,                                   /* sd */
3023                 NULL,                                   /* ea_list */
3024                 &fsp,                                   /* result */
3025                 NULL);                                  /* pinfo */
3026
3027         if (NT_STATUS_IS_OK(status)) {
3028                 close_file(req, fsp, NORMAL_CLOSE);
3029         }
3030
3031         return status;
3032 }
3033
3034 /****************************************************************************
3035  Receive notification that one of our open files has been renamed by another
3036  smbd process.
3037 ****************************************************************************/
3038
3039 void msg_file_was_renamed(struct messaging_context *msg,
3040                           void *private_data,
3041                           uint32_t msg_type,
3042                           struct server_id server_id,
3043                           DATA_BLOB *data)
3044 {
3045         struct smbd_server_connection *sconn;
3046         files_struct *fsp;
3047         char *frm = (char *)data->data;
3048         struct file_id id;
3049         const char *sharepath;
3050         const char *base_name;
3051         const char *stream_name;
3052         struct smb_filename *smb_fname = NULL;
3053         size_t sp_len, bn_len;
3054         NTSTATUS status;
3055
3056         sconn = msg_ctx_to_sconn(msg);
3057         if (sconn == NULL) {
3058                 DEBUG(1, ("could not find sconn\n"));
3059                 return;
3060         }
3061
3062         if (data->data == NULL
3063             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3064                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3065                           (int)data->length));
3066                 return;
3067         }
3068
3069         /* Unpack the message. */
3070         pull_file_id_24(frm, &id);
3071         sharepath = &frm[24];
3072         sp_len = strlen(sharepath);
3073         base_name = sharepath + sp_len + 1;
3074         bn_len = strlen(base_name);
3075         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3076
3077         /* stream_name must always be NULL if there is no stream. */
3078         if (stream_name[0] == '\0') {
3079                 stream_name = NULL;
3080         }
3081
3082         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3083                                             stream_name, NULL, &smb_fname);
3084         if (!NT_STATUS_IS_OK(status)) {
3085                 return;
3086         }
3087
3088         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3089                 "file_id %s\n",
3090                 sharepath, smb_fname_str_dbg(smb_fname),
3091                 file_id_string_tos(&id)));
3092
3093         for(fsp = file_find_di_first(sconn, id); fsp;
3094             fsp = file_find_di_next(fsp)) {
3095                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3096
3097                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3098                                 fsp->fnum, fsp_str_dbg(fsp),
3099                                 smb_fname_str_dbg(smb_fname)));
3100                         status = fsp_set_smb_fname(fsp, smb_fname);
3101                         if (!NT_STATUS_IS_OK(status)) {
3102                                 goto out;
3103                         }
3104                 } else {
3105                         /* TODO. JRA. */
3106                         /* Now we have the complete path we can work out if this is
3107                            actually within this share and adjust newname accordingly. */
3108                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3109                                 "not sharepath %s) "
3110                                 "fnum %d from %s -> %s\n",
3111                                 fsp->conn->connectpath,
3112                                 sharepath,
3113                                 fsp->fnum,
3114                                 fsp_str_dbg(fsp),
3115                                 smb_fname_str_dbg(smb_fname)));
3116                 }
3117         }
3118  out:
3119         TALLOC_FREE(smb_fname);
3120         return;
3121 }
3122
3123 /*
3124  * If a main file is opened for delete, all streams need to be checked for
3125  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3126  * If that works, delete them all by setting the delete on close and close.
3127  */
3128
3129 NTSTATUS open_streams_for_delete(connection_struct *conn,
3130                                         const char *fname)
3131 {
3132         struct stream_struct *stream_info;
3133         files_struct **streams;
3134         int i;
3135         unsigned int num_streams;
3136         TALLOC_CTX *frame = talloc_stackframe();
3137         NTSTATUS status;
3138
3139         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
3140                                     &num_streams, &stream_info);
3141
3142         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3143             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3144                 DEBUG(10, ("no streams around\n"));
3145                 TALLOC_FREE(frame);
3146                 return NT_STATUS_OK;
3147         }
3148
3149         if (!NT_STATUS_IS_OK(status)) {
3150                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
3151                            nt_errstr(status)));
3152                 goto fail;
3153         }
3154
3155         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3156                    num_streams));
3157
3158         if (num_streams == 0) {
3159                 TALLOC_FREE(frame);
3160                 return NT_STATUS_OK;
3161         }
3162
3163         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3164         if (streams == NULL) {
3165                 DEBUG(0, ("talloc failed\n"));
3166                 status = NT_STATUS_NO_MEMORY;
3167                 goto fail;
3168         }
3169
3170         for (i=0; i<num_streams; i++) {
3171                 struct smb_filename *smb_fname = NULL;
3172
3173                 if (strequal(stream_info[i].name, "::$DATA")) {
3174                         streams[i] = NULL;
3175                         continue;
3176                 }
3177
3178                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3179                                                     stream_info[i].name,
3180                                                     NULL, &smb_fname);
3181                 if (!NT_STATUS_IS_OK(status)) {
3182                         goto fail;
3183                 }
3184
3185                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3186                         DEBUG(10, ("Unable to stat stream: %s\n",
3187                                    smb_fname_str_dbg(smb_fname)));
3188                 }
3189
3190                 status = SMB_VFS_CREATE_FILE(
3191                          conn,                  /* conn */
3192                          NULL,                  /* req */
3193                          0,                     /* root_dir_fid */
3194                          smb_fname,             /* fname */
3195                          DELETE_ACCESS,         /* access_mask */
3196                          (FILE_SHARE_READ |     /* share_access */
3197                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3198                          FILE_OPEN,             /* create_disposition*/
3199                          0,                     /* create_options */
3200                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3201                          0,                     /* oplock_request */
3202                          0,                     /* allocation_size */
3203                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3204                          NULL,                  /* sd */
3205                          NULL,                  /* ea_list */
3206                          &streams[i],           /* result */
3207                          NULL);                 /* pinfo */
3208
3209                 if (!NT_STATUS_IS_OK(status)) {
3210                         DEBUG(10, ("Could not open stream %s: %s\n",
3211                                    smb_fname_str_dbg(smb_fname),
3212                                    nt_errstr(status)));
3213
3214                         TALLOC_FREE(smb_fname);
3215                         break;
3216                 }
3217                 TALLOC_FREE(smb_fname);
3218         }
3219
3220         /*
3221          * don't touch the variable "status" beyond this point :-)
3222          */
3223
3224         for (i -= 1 ; i >= 0; i--) {
3225                 if (streams[i] == NULL) {
3226                         continue;
3227                 }
3228
3229                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3230                            fsp_str_dbg(streams[i])));
3231                 close_file(NULL, streams[i], NORMAL_CLOSE);
3232         }
3233
3234  fail:
3235         TALLOC_FREE(frame);
3236         return status;
3237 }
3238
3239 /*
3240  * Wrapper around open_file_ntcreate and open_directory
3241  */
3242
3243 static NTSTATUS create_file_unixpath(connection_struct *conn,
3244                                      struct smb_request *req,
3245                                      struct smb_filename *smb_fname,
3246                                      uint32_t access_mask,
3247                                      uint32_t share_access,
3248                                      uint32_t create_disposition,
3249                                      uint32_t create_options,
3250                                      uint32_t file_attributes,
3251                                      uint32_t oplock_request,
3252                                      uint64_t allocation_size,
3253                                      uint32_t private_flags,
3254                                      struct security_descriptor *sd,
3255                                      struct ea_list *ea_list,
3256
3257                                      files_struct **result,
3258                                      int *pinfo)
3259 {
3260         int info = FILE_WAS_OPENED;
3261         files_struct *base_fsp = NULL;
3262         files_struct *fsp = NULL;
3263         NTSTATUS status;
3264
3265         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3266                   "file_attributes = 0x%x, share_access = 0x%x, "
3267                   "create_disposition = 0x%x create_options = 0x%x "
3268                   "oplock_request = 0x%x private_flags = 0x%x "
3269                   "ea_list = 0x%p, sd = 0x%p, "
3270                   "fname = %s\n",
3271                   (unsigned int)access_mask,
3272                   (unsigned int)file_attributes,
3273                   (unsigned int)share_access,
3274                   (unsigned int)create_disposition,
3275                   (unsigned int)create_options,
3276                   (unsigned int)oplock_request,
3277                   (unsigned int)private_flags,
3278                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3279
3280         if (create_options & FILE_OPEN_BY_FILE_ID) {
3281                 status = NT_STATUS_NOT_SUPPORTED;
3282                 goto fail;
3283         }
3284
3285         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3286                 status = NT_STATUS_INVALID_PARAMETER;
3287                 goto fail;
3288         }
3289
3290         if (req == NULL) {
3291                 oplock_request |= INTERNAL_OPEN_ONLY;
3292         }
3293
3294         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3295             && (access_mask & DELETE_ACCESS)
3296             && !is_ntfs_stream_smb_fname(smb_fname)) {
3297                 /*
3298                  * We can't open a file with DELETE access if any of the
3299                  * streams is open without FILE_SHARE_DELETE
3300                  */
3301                 status = open_streams_for_delete(conn, smb_fname->base_name);
3302
3303                 if (!NT_STATUS_IS_OK(status)) {
3304                         goto fail;
3305                 }
3306         }
3307
3308         /* This is the correct thing to do (check every time) but can_delete
3309          * is expensive (it may have to read the parent directory
3310          * permissions). So for now we're not doing it unless we have a strong
3311          * hint the client is really going to delete this file. If the client
3312          * is forcing FILE_CREATE let the filesystem take care of the
3313          * permissions. */
3314
3315         /* Setting FILE_SHARE_DELETE is the hint. */
3316
3317         if ((create_disposition != FILE_CREATE)
3318             && (access_mask & DELETE_ACCESS)
3319             && (!(can_delete_file_in_directory(conn, smb_fname) ||
3320                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3321                 status = NT_STATUS_ACCESS_DENIED;
3322                 DEBUG(10,("create_file_unixpath: open file %s "
3323                           "for delete ACCESS_DENIED\n",
3324                           smb_fname_str_dbg(smb_fname)));
3325                 goto fail;
3326         }
3327
3328         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3329                         !security_token_has_privilege(get_current_nttok(conn),
3330                                         SEC_PRIV_SECURITY)) {
3331                 DEBUG(10, ("create_file_unixpath: open on %s "
3332                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3333                         smb_fname_str_dbg(smb_fname)));
3334                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3335                 goto fail;
3336         }
3337
3338         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3339             && is_ntfs_stream_smb_fname(smb_fname)
3340             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3341                 uint32 base_create_disposition;
3342                 struct smb_filename *smb_fname_base = NULL;
3343
3344                 if (create_options & FILE_DIRECTORY_FILE) {
3345                         status = NT_STATUS_NOT_A_DIRECTORY;
3346                         goto fail;
3347                 }
3348
3349                 switch (create_disposition) {
3350                 case FILE_OPEN:
3351                         base_create_disposition = FILE_OPEN;
3352                         break;
3353                 default:
3354                         base_create_disposition = FILE_OPEN_IF;
3355                         break;
3356                 }
3357
3358                 /* Create an smb_filename with stream_name == NULL. */
3359                 status = create_synthetic_smb_fname(talloc_tos(),
3360                                                     smb_fname->base_name,
3361                                                     NULL, NULL,
3362                                                     &smb_fname_base);
3363                 if (!NT_STATUS_IS_OK(status)) {
3364                         goto fail;
3365                 }
3366
3367                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3368                         DEBUG(10, ("Unable to stat stream: %s\n",
3369                                    smb_fname_str_dbg(smb_fname_base)));
3370                 }
3371
3372                 /* Open the base file. */
3373                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3374                                               FILE_SHARE_READ
3375                                               | FILE_SHARE_WRITE
3376                                               | FILE_SHARE_DELETE,
3377                                               base_create_disposition,
3378                                               0, 0, 0, 0, 0, NULL, NULL,
3379                                               &base_fsp, NULL);
3380                 TALLOC_FREE(smb_fname_base);
3381
3382                 if (!NT_STATUS_IS_OK(status)) {
3383                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3384                                    "%s\n", smb_fname->base_name,
3385                                    nt_errstr(status)));
3386                         goto fail;
3387                 }
3388                 /* we don't need to low level fd */
3389                 fd_close(base_fsp);
3390         }
3391
3392         /*
3393          * If it's a request for a directory open, deal with it separately.
3394          */
3395
3396         if (create_options & FILE_DIRECTORY_FILE) {
3397
3398                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3399                         status = NT_STATUS_INVALID_PARAMETER;
3400                         goto fail;
3401                 }
3402
3403                 /* Can't open a temp directory. IFS kit test. */
3404                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3405                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3406                         status = NT_STATUS_INVALID_PARAMETER;
3407                         goto fail;
3408                 }
3409
3410                 /*
3411                  * We will get a create directory here if the Win32
3412                  * app specified a security descriptor in the
3413                  * CreateDirectory() call.
3414                  */
3415
3416                 oplock_request = 0;
3417                 status = open_directory(
3418                         conn, req, smb_fname, access_mask, share_access,
3419                         create_disposition, create_options, file_attributes,
3420                         &info, &fsp);
3421         } else {
3422
3423                 /*
3424                  * Ordinary file case.
3425                  */
3426
3427                 status = file_new(req, conn, &fsp);
3428                 if(!NT_STATUS_IS_OK(status)) {
3429                         goto fail;
3430                 }
3431
3432                 status = fsp_set_smb_fname(fsp, smb_fname);
3433                 if (!NT_STATUS_IS_OK(status)) {
3434                         goto fail;
3435                 }
3436
3437                 /*
3438                  * We're opening the stream element of a base_fsp
3439                  * we already opened. Set up the base_fsp pointer.
3440                  */
3441                 if (base_fsp) {
3442                         fsp->base_fsp = base_fsp;
3443                 }
3444
3445                 status = open_file_ntcreate(conn,
3446                                             req,
3447                                             access_mask,
3448                                             share_access,
3449                                             create_disposition,
3450                                             create_options,
3451                                             file_attributes,
3452                                             oplock_request,
3453                                             private_flags,
3454                                             &info,
3455                                             fsp);
3456
3457                 if(!NT_STATUS_IS_OK(status)) {
3458                         file_free(req, fsp);
3459                         fsp = NULL;
3460                 }
3461
3462                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3463
3464                         /* A stream open never opens a directory */
3465
3466                         if (base_fsp) {
3467                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3468                                 goto fail;
3469                         }
3470
3471                         /*
3472                          * Fail the open if it was explicitly a non-directory
3473                          * file.
3474                          */
3475
3476                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3477                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3478                                 goto fail;
3479                         }
3480
3481                         oplock_request = 0;
3482                         status = open_directory(
3483                                 conn, req, smb_fname, access_mask,
3484                                 share_access, create_disposition,
3485                                 create_options, file_attributes,
3486                                 &info, &fsp);
3487                 }
3488         }
3489
3490         if (!NT_STATUS_IS_OK(status)) {
3491                 goto fail;
3492         }
3493
3494         fsp->base_fsp = base_fsp;
3495
3496         /*
3497          * According to the MS documentation, the only time the security
3498          * descriptor is applied to the opened file is iff we *created* the
3499          * file; an existing file stays the same.
3500          *
3501          * Also, it seems (from observation) that you can open the file with
3502          * any access mask but you can still write the sd. We need to override
3503          * the granted access before we call set_sd
3504          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3505          */
3506
3507         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3508             && lp_nt_acl_support(SNUM(conn))) {
3509
3510                 uint32_t sec_info_sent;
3511                 uint32_t saved_access_mask = fsp->access_mask;
3512
3513                 sec_info_sent = get_sec_info(sd);
3514
3515                 fsp->access_mask = FILE_GENERIC_ALL;
3516
3517                 /* Convert all the generic bits. */
3518                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3519                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3520
3521                 if (sec_info_sent & (SECINFO_OWNER|
3522                                         SECINFO_GROUP|
3523                                         SECINFO_DACL|
3524                                         SECINFO_SACL)) {
3525                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3526                 }
3527
3528                 fsp->access_mask = saved_access_mask;
3529
3530                 if (!NT_STATUS_IS_OK(status)) {
3531                         goto fail;
3532                 }
3533         }
3534
3535         if ((ea_list != NULL) &&
3536             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3537                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3538                 if (!NT_STATUS_IS_OK(status)) {
3539                         goto fail;
3540                 }
3541         }
3542
3543         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3544                 status = NT_STATUS_ACCESS_DENIED;
3545                 goto fail;
3546         }
3547
3548         /* Save the requested allocation size. */
3549         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3550                 if (allocation_size
3551                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3552                         fsp->initial_allocation_size = smb_roundup(
3553                                 fsp->conn, allocation_size);
3554                         if (fsp->is_directory) {
3555                                 /* Can't set allocation size on a directory. */
3556                                 status = NT_STATUS_ACCESS_DENIED;
3557                                 goto fail;
3558                         }
3559                         if (vfs_allocate_file_space(
3560                                     fsp, fsp->initial_allocation_size) == -1) {
3561                                 status = NT_STATUS_DISK_FULL;
3562                                 goto fail;
3563                         }
3564                 } else {
3565                         fsp->initial_allocation_size = smb_roundup(
3566                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3567                 }
3568         }
3569
3570         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3571
3572         *result = fsp;
3573         if (pinfo != NULL) {
3574                 *pinfo = info;
3575         }
3576
3577         smb_fname->st = fsp->fsp_name->st;
3578
3579         return NT_STATUS_OK;
3580
3581  fail:
3582         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3583
3584         if (fsp != NULL) {
3585                 if (base_fsp && fsp->base_fsp == base_fsp) {
3586                         /*
3587                          * The close_file below will close
3588                          * fsp->base_fsp.
3589                          */
3590                         base_fsp = NULL;
3591                 }
3592                 close_file(req, fsp, ERROR_CLOSE);
3593                 fsp = NULL;
3594         }
3595         if (base_fsp != NULL) {
3596                 close_file(req, base_fsp, ERROR_CLOSE);
3597                 base_fsp = NULL;
3598         }
3599         return status;
3600 }
3601
3602 /*
3603  * Calculate the full path name given a relative fid.
3604  */
3605 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3606                                    struct smb_request *req,
3607                                    uint16_t root_dir_fid,
3608                                    const struct smb_filename *smb_fname,
3609                                    struct smb_filename **smb_fname_out)
3610 {
3611         files_struct *dir_fsp;
3612         char *parent_fname = NULL;
3613         char *new_base_name = NULL;
3614         NTSTATUS status;
3615
3616         if (root_dir_fid == 0 || !smb_fname) {
3617                 status = NT_STATUS_INTERNAL_ERROR;
3618                 goto out;
3619         }
3620
3621         dir_fsp = file_fsp(req, root_dir_fid);
3622
3623         if (dir_fsp == NULL) {
3624                 status = NT_STATUS_INVALID_HANDLE;
3625                 goto out;
3626         }
3627
3628         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3629                 status = NT_STATUS_INVALID_HANDLE;
3630                 goto out;
3631         }
3632
3633         if (!dir_fsp->is_directory) {
3634
3635                 /*
3636                  * Check to see if this is a mac fork of some kind.
3637                  */
3638
3639                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3640                     is_ntfs_stream_smb_fname(smb_fname)) {
3641                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3642                         goto out;
3643                 }
3644
3645                 /*
3646                   we need to handle the case when we get a
3647                   relative open relative to a file and the
3648                   pathname is blank - this is a reopen!
3649                   (hint from demyn plantenberg)
3650                 */
3651
3652                 status = NT_STATUS_INVALID_HANDLE;
3653                 goto out;
3654         }
3655
3656         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3657                 /*
3658                  * We're at the toplevel dir, the final file name
3659                  * must not contain ./, as this is filtered out
3660                  * normally by srvstr_get_path and unix_convert
3661                  * explicitly rejects paths containing ./.
3662                  */
3663                 parent_fname = talloc_strdup(talloc_tos(), "");
3664                 if (parent_fname == NULL) {
3665                         status = NT_STATUS_NO_MEMORY;
3666                         goto out;
3667                 }
3668         } else {
3669                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3670
3671                 /*
3672                  * Copy in the base directory name.
3673                  */
3674
3675                 parent_fname = talloc_array(talloc_tos(), char,
3676                     dir_name_len+2);
3677                 if (parent_fname == NULL) {
3678                         status = NT_STATUS_NO_MEMORY;
3679                         goto out;
3680                 }
3681                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3682                     dir_name_len+1);
3683
3684                 /*
3685                  * Ensure it ends in a '/'.
3686                  * We used TALLOC_SIZE +2 to add space for the '/'.
3687                  */
3688
3689                 if(dir_name_len
3690                     && (parent_fname[dir_name_len-1] != '\\')
3691                     && (parent_fname[dir_name_len-1] != '/')) {
3692                         parent_fname[dir_name_len] = '/';
3693                         parent_fname[dir_name_len+1] = '\0';
3694                 }
3695         }
3696
3697         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3698                                         smb_fname->base_name);
3699         if (new_base_name == NULL) {
3700                 status = NT_STATUS_NO_MEMORY;
3701                 goto out;
3702         }
3703
3704         status = filename_convert(req,
3705                                 conn,
3706                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3707                                 new_base_name,
3708                                 0,
3709                                 NULL,
3710                                 smb_fname_out);
3711         if (!NT_STATUS_IS_OK(status)) {
3712                 goto out;
3713         }
3714
3715  out:
3716         TALLOC_FREE(parent_fname);
3717         TALLOC_FREE(new_base_name);
3718         return status;
3719 }
3720
3721 NTSTATUS create_file_default(connection_struct *conn,
3722                              struct smb_request *req,
3723                              uint16_t root_dir_fid,
3724                              struct smb_filename *smb_fname,
3725                              uint32_t access_mask,
3726                              uint32_t share_access,
3727                              uint32_t create_disposition,
3728                              uint32_t create_options,
3729                              uint32_t file_attributes,
3730                              uint32_t oplock_request,
3731                              uint64_t allocation_size,
3732                              uint32_t private_flags,
3733                              struct security_descriptor *sd,
3734                              struct ea_list *ea_list,
3735                              files_struct **result,
3736                              int *pinfo)
3737 {
3738         int info = FILE_WAS_OPENED;
3739         files_struct *fsp = NULL;
3740         NTSTATUS status;
3741         bool stream_name = false;
3742
3743         DEBUG(10,("create_file: access_mask = 0x%x "
3744                   "file_attributes = 0x%x, share_access = 0x%x, "
3745                   "create_disposition = 0x%x create_options = 0x%x "
3746                   "oplock_request = 0x%x "
3747                   "private_flags = 0x%x "
3748                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3749                   "fname = %s\n",
3750                   (unsigned int)access_mask,
3751                   (unsigned int)file_attributes,
3752                   (unsigned int)share_access,
3753                   (unsigned int)create_disposition,
3754                   (unsigned int)create_options,
3755                   (unsigned int)oplock_request,
3756                   (unsigned int)private_flags,
3757                   (unsigned int)root_dir_fid,
3758                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3759
3760         /*
3761          * Calculate the filename from the root_dir_if if necessary.
3762          */
3763
3764         if (root_dir_fid != 0) {
3765                 struct smb_filename *smb_fname_out = NULL;
3766                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3767                                                    smb_fname, &smb_fname_out);
3768                 if (!NT_STATUS_IS_OK(status)) {
3769                         goto fail;
3770                 }
3771                 smb_fname = smb_fname_out;
3772         }
3773
3774         /*
3775          * Check to see if this is a mac fork of some kind.
3776          */
3777
3778         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3779         if (stream_name) {
3780                 enum FAKE_FILE_TYPE fake_file_type;
3781
3782                 fake_file_type = is_fake_file(smb_fname);
3783
3784                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3785
3786                         /*
3787                          * Here we go! support for changing the disk quotas
3788                          * --metze
3789                          *
3790                          * We need to fake up to open this MAGIC QUOTA file
3791                          * and return a valid FID.
3792                          *
3793                          * w2k close this file directly after openening xp
3794                          * also tries a QUERY_FILE_INFO on the file and then
3795                          * close it
3796                          */
3797                         status = open_fake_file(req, conn, req->vuid,
3798                                                 fake_file_type, smb_fname,
3799                                                 access_mask, &fsp);
3800                         if (!NT_STATUS_IS_OK(status)) {
3801                                 goto fail;
3802                         }
3803
3804                         ZERO_STRUCT(smb_fname->st);
3805                         goto done;
3806                 }
3807
3808                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3809                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3810                         goto fail;
3811                 }
3812         }
3813
3814         /* All file access must go through check_name() */
3815
3816         status = check_name(conn, smb_fname->base_name);
3817         if (!NT_STATUS_IS_OK(status)) {
3818                 goto fail;
3819         }
3820
3821         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3822                 int ret;
3823                 smb_fname->stream_name = NULL;
3824                 /* We have to handle this error here. */
3825                 if (create_options & FILE_DIRECTORY_FILE) {
3826                         status = NT_STATUS_NOT_A_DIRECTORY;
3827                         goto fail;
3828                 }
3829                 if (lp_posix_pathnames()) {
3830                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3831                 } else {
3832                         ret = SMB_VFS_STAT(conn, smb_fname);
3833                 }
3834
3835                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3836                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3837                         goto fail;
3838                 }
3839         }
3840
3841         status = create_file_unixpath(
3842                 conn, req, smb_fname, access_mask, share_access,
3843                 create_disposition, create_options, file_attributes,
3844                 oplock_request, allocation_size, private_flags,
3845                 sd, ea_list,
3846                 &fsp, &info);
3847
3848         if (!NT_STATUS_IS_OK(status)) {
3849                 goto fail;
3850         }
3851
3852  done:
3853         DEBUG(10, ("create_file: info=%d\n", info));
3854
3855         *result = fsp;
3856         if (pinfo != NULL) {
3857                 *pinfo = info;
3858         }
3859         return NT_STATUS_OK;
3860
3861  fail:
3862         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3863
3864         if (fsp != NULL) {
3865                 close_file(req, fsp, ERROR_CLOSE);
3866                 fsp = NULL;
3867         }
3868         return status;
3869 }