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 "printing.h"
  24 #include "smbd/globals.h"
  25 #include "fake_file.h"
  26 #include "librpc/gen_ndr/messaging.h"
  27 #include "../libcli/security/security.h"
  28 #include "../librpc/gen_ndr/ndr_security.h"
  29
  30 extern const struct generic_mapping file_generic_mapping;
  31
  32 struct deferred_open_record {
  33         bool delayed_for_oplocks;
  34         struct file_id id;
  35 };
  36
  37 /****************************************************************************
  38  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
  39 ****************************************************************************/
  40
  41 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
  42                                 const struct security_descriptor *sd,
  43                                 const struct security_token *token,
  44                                 uint32_t access_desired,
  45                                 uint32_t *access_granted)
  46 {
  47         *access_granted = 0;
  48
  49         if (get_current_uid(conn) == (uid_t)0) {
  50                 /* I'm sorry sir, I didn't know you were root... */
  51                 *access_granted = access_desired;
  52                 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
  53                         *access_granted |= FILE_GENERIC_ALL;
  54                 }
  55                 return NT_STATUS_OK;
  56         }
  57
  58         return se_access_check(sd,
  59                                 token,
  60                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  61                                 access_granted);
  62 }
  63
  64 /****************************************************************************
  65  Check if we have open rights.
  66 ****************************************************************************/
  67
  68 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  69                                 const struct smb_filename *smb_fname,
  70                                 uint32_t access_mask,
  71                                 uint32_t *access_granted)
  72 {
  73         /* Check if we have rights to open. */
  74         NTSTATUS status;
  75         struct security_descriptor *sd = NULL;
  76
  77         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
  78                         (SECINFO_OWNER |
  79                         SECINFO_GROUP |
  80                         SECINFO_DACL),&sd);
  81
  82         if (!NT_STATUS_IS_OK(status)) {
  83                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
  84                         "on %s: %s\n",
  85                         smb_fname_str_dbg(smb_fname),
  86                         nt_errstr(status)));
  87                 return status;
  88         }
  89
  90         status = smb1_file_se_access_check(conn,
  91                                 sd,
  92                                 get_current_nttok(conn),
  93                                 access_mask,
  94                                 access_granted);
  95
  96         DEBUG(10,("smbd_check_open_rights: file %s requesting "
  97                 "0x%x returning 0x%x (%s)\n",
  98                 smb_fname_str_dbg(smb_fname),
  99                 (unsigned int)access_mask,
 100                 (unsigned int)*access_granted,
 101                 nt_errstr(status) ));
 102
 103         if (!NT_STATUS_IS_OK(status)) {
 104                 if (DEBUGLEVEL >= 10) {
 105                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 106                                 smb_fname_str_dbg(smb_fname) ));
 107                         NDR_PRINT_DEBUG(security_descriptor, sd);
 108                 }
 109         }
 110
 111         TALLOC_FREE(sd);
 112
 113         return status;
 114 }
 115
 116 /****************************************************************************
 117  fd support routines - attempt to do a dos_open.
 118 ****************************************************************************/
 119
 120 static NTSTATUS fd_open(struct connection_struct *conn,
 121                     files_struct *fsp,
 122                     int flags,
 123                     mode_t mode)
 124 {
 125         struct smb_filename *smb_fname = fsp->fsp_name;
 126         NTSTATUS status = NT_STATUS_OK;
 127
 128 #ifdef O_NOFOLLOW
 129         /*
 130          * Never follow symlinks on a POSIX client. The
 131          * client should be doing this.
 132          */
 133
 134         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 135                 flags |= O_NOFOLLOW;
 136         }
 137 #endif
 138
 139         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 140         if (fsp->fh->fd == -1) {
 141                 status = map_nt_error_from_unix(errno);
 142                 if (errno == EMFILE) {
 143                         static time_t last_warned = 0L;
 144
 145                         if (time((time_t *) NULL) > last_warned) {
 146                                 DEBUG(0,("Too many open files, unable "
 147                                         "to open more!  smbd's max "
 148                                         "open files = %d\n",
 149                                         lp_max_open_files()));
 150                                 last_warned = time((time_t *) NULL);
 151                         }
 152                 }
 153
 154         }
 155
 156         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 157                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 158                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 159
 160         return status;
 161 }
 162
 163 /****************************************************************************
 164  Close the file associated with a fsp.
 165 ****************************************************************************/
 166
 167 NTSTATUS fd_close(files_struct *fsp)
 168 {
 169         int ret;
 170
 171         if (fsp->fh->fd == -1) {
 172                 return NT_STATUS_OK; /* What we used to call a stat open. */
 173         }
 174         if (fsp->fh->ref_count > 1) {
 175                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 176         }
 177
 178         ret = SMB_VFS_CLOSE(fsp);
 179         fsp->fh->fd = -1;
 180         if (ret == -1) {
 181                 return map_nt_error_from_unix(errno);
 182         }
 183         return NT_STATUS_OK;
 184 }
 185
 186 /****************************************************************************
 187  Change the ownership of a file to that of the parent directory.
 188  Do this by fd if possible.
 189 ****************************************************************************/
 190
 191 void change_file_owner_to_parent(connection_struct *conn,
 192                                         const char *inherit_from_dir,
 193                                         files_struct *fsp)
 194 {
 195         struct smb_filename *smb_fname_parent = NULL;
 196         NTSTATUS status;
 197         int ret;
 198
 199         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 200                                             NULL, NULL, &smb_fname_parent);
 201         if (!NT_STATUS_IS_OK(status)) {
 202                 return;
 203         }
 204
 205         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 206         if (ret == -1) {
 207                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 208                          "directory %s. Error was %s\n",
 209                          smb_fname_str_dbg(smb_fname_parent),
 210                          strerror(errno)));
 211                 return;
 212         }
 213
 214         become_root();
 215         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 216         unbecome_root();
 217         if (ret == -1) {
 218                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 219                          "file %s to parent directory uid %u. Error "
 220                          "was %s\n", fsp_str_dbg(fsp),
 221                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 222                          strerror(errno) ));
 223         }
 224
 225         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 226                   "parent directory uid %u.\n", fsp_str_dbg(fsp),
 227                   (unsigned int)smb_fname_parent->st.st_ex_uid));
 228
 229         TALLOC_FREE(smb_fname_parent);
 230 }
 231
 232 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 233                                        const char *inherit_from_dir,
 234                                        const char *fname,
 235                                        SMB_STRUCT_STAT *psbuf)
 236 {
 237         struct smb_filename *smb_fname_parent = NULL;
 238         struct smb_filename *smb_fname_cwd = NULL;
 239         char *saved_dir = NULL;
 240         TALLOC_CTX *ctx = talloc_tos();
 241         NTSTATUS status = NT_STATUS_OK;
 242         int ret;
 243
 244         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 245                                             &smb_fname_parent);
 246         if (!NT_STATUS_IS_OK(status)) {
 247                 return status;
 248         }
 249
 250         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 251         if (ret == -1) {
 252                 status = map_nt_error_from_unix(errno);
 253                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 254                          "directory %s. Error was %s\n",
 255                          smb_fname_str_dbg(smb_fname_parent),
 256                          strerror(errno)));
 257                 goto out;
 258         }
 259
 260         /* We've already done an lstat into psbuf, and we know it's a
 261            directory. If we can cd into the directory and the dev/ino
 262            are the same then we can safely chown without races as
 263            we're locking the directory in place by being in it.  This
 264            should work on any UNIX (thanks tridge :-). JRA.
 265         */
 266
 267         saved_dir = vfs_GetWd(ctx,conn);
 268         if (!saved_dir) {
 269                 status = map_nt_error_from_unix(errno);
 270                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 271                          "current working directory. Error was %s\n",
 272                          strerror(errno)));
 273                 goto out;
 274         }
 275
 276         /* Chdir into the new path. */
 277         if (vfs_ChDir(conn, fname) == -1) {
 278                 status = map_nt_error_from_unix(errno);
 279                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 280                          "current working directory to %s. Error "
 281                          "was %s\n", fname, strerror(errno) ));
 282                 goto chdir;
 283         }
 284
 285         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 286                                             &smb_fname_cwd);
 287         if (!NT_STATUS_IS_OK(status)) {
 288                 return status;
 289         }
 290
 291         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 292         if (ret == -1) {
 293                 status = map_nt_error_from_unix(errno);
 294                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 295                          "directory '.' (%s) Error was %s\n",
 296                          fname, strerror(errno)));
 297                 goto chdir;
 298         }
 299
 300         /* Ensure we're pointing at the same place. */
 301         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 302             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
 303             smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
 304                 DEBUG(0,("change_dir_owner_to_parent: "
 305                          "device/inode/mode on directory %s changed. "
 306                          "Refusing to chown !\n", fname ));
 307                 status = NT_STATUS_ACCESS_DENIED;
 308                 goto chdir;
 309         }
 310
 311         become_root();
 312         ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 313                             (gid_t)-1);
 314         unbecome_root();
 315         if (ret == -1) {
 316                 status = map_nt_error_from_unix(errno);
 317                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 318                           "directory %s to parent directory uid %u. "
 319                           "Error was %s\n", fname,
 320                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 321                           strerror(errno) ));
 322                 goto chdir;
 323         }
 324
 325         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 326                   "directory %s to parent directory uid %u.\n",
 327                   fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 328
 329  chdir:
 330         vfs_ChDir(conn,saved_dir);
 331  out:
 332         TALLOC_FREE(smb_fname_parent);
 333         TALLOC_FREE(smb_fname_cwd);
 334         return status;
 335 }
 336
 337 /****************************************************************************
 338  Open a file.
 339 ****************************************************************************/
 340
 341 static NTSTATUS open_file(files_struct *fsp,
 342                           connection_struct *conn,
 343                           struct smb_request *req,
 344                           const char *parent_dir,
 345                           int flags,
 346                           mode_t unx_mode,
 347                           uint32 access_mask, /* client requested access mask. */
 348                           uint32 open_access_mask) /* what we're actually using in the open. */
 349 {
 350         struct smb_filename *smb_fname = fsp->fsp_name;
 351         NTSTATUS status = NT_STATUS_OK;
 352         int accmode = (flags & O_ACCMODE);
 353         int local_flags = flags;
 354         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 355
 356         fsp->fh->fd = -1;
 357         errno = EPERM;
 358
 359         /* Check permissions */
 360
 361         /*
 362          * This code was changed after seeing a client open request
 363          * containing the open mode of (DENY_WRITE/read-only) with
 364          * the 'create if not exist' bit set. The previous code
 365          * would fail to open the file read only on a read-only share
 366          * as it was checking the flags parameter  directly against O_RDONLY,
 367          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 368          * JRA.
 369          */
 370
 371         if (!CAN_WRITE(conn)) {
 372                 /* It's a read-only share - fail if we wanted to write. */
 373                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 374                         DEBUG(3,("Permission denied opening %s\n",
 375                                  smb_fname_str_dbg(smb_fname)));
 376                         return NT_STATUS_ACCESS_DENIED;
 377                 } else if(flags & O_CREAT) {
 378                         /* We don't want to write - but we must make sure that
 379                            O_CREAT doesn't create the file if we have write
 380                            access into the directory.
 381                         */
 382                         flags &= ~(O_CREAT|O_EXCL);
 383                         local_flags &= ~(O_CREAT|O_EXCL);
 384                 }
 385         }
 386
 387         /*
 388          * This little piece of insanity is inspired by the
 389          * fact that an NT client can open a file for O_RDONLY,
 390          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 391          * If the client *can* write to the file, then it expects to
 392          * truncate the file, even though it is opening for readonly.
 393          * Quicken uses this stupid trick in backup file creation...
 394          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 395          * for helping track this one down. It didn't bite us in 2.0.x
 396          * as we always opened files read-write in that release. JRA.
 397          */
 398
 399         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 400                 DEBUG(10,("open_file: truncate requested on read-only open "
 401                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 402                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 403         }
 404
 405         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 406             (!file_existed && (local_flags & O_CREAT)) ||
 407             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 408                 const char *wild;
 409
 410                 /*
 411                  * We can't actually truncate here as the file may be locked.
 412                  * open_file_ntcreate will take care of the truncate later. JRA.
 413                  */
 414
 415                 local_flags &= ~O_TRUNC;
 416
 417 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 418                 /*
 419                  * We would block on opening a FIFO with no one else on the
 420                  * other end. Do what we used to do and add O_NONBLOCK to the
 421                  * open flags. JRA.
 422                  */
 423
 424                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 425                         local_flags |= O_NONBLOCK;
 426                 }
 427 #endif
 428
 429                 /* Don't create files with Microsoft wildcard characters. */
 430                 if (fsp->base_fsp) {
 431                         /*
 432                          * wildcard characters are allowed in stream names
 433                          * only test the basefilename
 434                          */
 435                         wild = fsp->base_fsp->fsp_name->base_name;
 436                 } else {
 437                         wild = smb_fname->base_name;
 438                 }
 439                 if ((local_flags & O_CREAT) && !file_existed &&
 440                     ms_has_wild(wild))  {
 441                         return NT_STATUS_OBJECT_NAME_INVALID;
 442                 }
 443
 444                 /* Actually do the open */
 445                 status = fd_open(conn, fsp, local_flags, unx_mode);
 446                 if (!NT_STATUS_IS_OK(status)) {
 447                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 448                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 449                                  nt_errstr(status),local_flags,flags));
 450                         return status;
 451                 }
 452
 453                 if ((local_flags & O_CREAT) && !file_existed) {
 454
 455                         /* Inherit the ACL if required */
 456                         if (lp_inherit_perms(SNUM(conn))) {
 457                                 inherit_access_posix_acl(conn, parent_dir,
 458                                                          smb_fname->base_name,
 459                                                          unx_mode);
 460                         }
 461
 462                         /* Change the owner if required. */
 463                         if (lp_inherit_owner(SNUM(conn))) {
 464                                 change_file_owner_to_parent(conn, parent_dir,
 465                                                             fsp);
 466                         }
 467
 468                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 469                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 470                                      smb_fname->base_name);
 471                 }
 472
 473         } else {
 474                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 475                 if (file_existed) {
 476                         uint32_t access_granted = 0;
 477
 478                         status = smbd_check_open_rights(conn,
 479                                         smb_fname,
 480                                         access_mask,
 481                                         &access_granted);
 482                         if (!NT_STATUS_IS_OK(status)) {
 483                                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 484                                         /*
 485                                          * On NT_STATUS_ACCESS_DENIED, access_granted
 486                                          * contains the denied bits.
 487                                          */
 488
 489                                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 490                                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
 491                                                         (lp_map_readonly(SNUM(conn)) ||
 492                                                          lp_map_archive(SNUM(conn)) ||
 493                                                          lp_map_hidden(SNUM(conn)) ||
 494                                                          lp_map_system(SNUM(conn)))) {
 495                                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
 496
 497                                                 DEBUG(10,("open_file: "
 498                                                           "overrode "
 499                                                           "FILE_WRITE_"
 500                                                           "ATTRIBUTES "
 501                                                           "on file %s\n",
 502                                                           smb_fname_str_dbg(
 503                                                                   smb_fname)));
 504                                         }
 505
 506                                         if ((access_mask & DELETE_ACCESS) &&
 507                                             (access_granted & DELETE_ACCESS) &&
 508                                             can_delete_file_in_directory(conn,
 509                                                 smb_fname)) {
 510                                                 /* Were we trying to do a stat open
 511                                                  * for delete and didn't get DELETE
 512                                                  * access (only) ? Check if the
 513                                                  * directory allows DELETE_CHILD.
 514                                                  * See here:
 515                                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 516                                                  * for details. */
 517
 518                                                 access_granted &= ~DELETE_ACCESS;
 519
 520                                                 DEBUG(10,("open_file: "
 521                                                           "overrode "
 522                                                           "DELETE_ACCESS on "
 523                                                           "file %s\n",
 524                                                           smb_fname_str_dbg(
 525                                                                   smb_fname)));
 526                                         }
 527
 528                                         if (access_granted != 0) {
 529                                                 DEBUG(10,("open_file: Access "
 530                                                           "denied on file "
 531                                                           "%s\n",
 532                                                           smb_fname_str_dbg(
 533                                                                   smb_fname)));
 534                                                 return status;
 535                                         }
 536                                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 537                                     fsp->posix_open &&
 538                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
 539                                         /* This is a POSIX stat open for delete
 540                                          * or rename on a symlink that points
 541                                          * nowhere. Allow. */
 542                                         DEBUG(10,("open_file: allowing POSIX "
 543                                                   "open on bad symlink %s\n",
 544                                                   smb_fname_str_dbg(
 545                                                           smb_fname)));
 546                                 } else {
 547                                         DEBUG(10,("open_file: "
 548                                                   "smbd_check_open_rights on file "
 549                                                   "%s returned %s\n",
 550                                                   smb_fname_str_dbg(smb_fname),
 551                                                   nt_errstr(status) ));
 552                                         return status;
 553                                 }
 554                         }
 555                 }
 556         }
 557
 558         if (!file_existed) {
 559                 int ret;
 560
 561                 if (fsp->fh->fd == -1) {
 562                         ret = SMB_VFS_STAT(conn, smb_fname);
 563                 } else {
 564                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 565                         /* If we have an fd, this stat should succeed. */
 566                         if (ret == -1) {
 567                                 DEBUG(0,("Error doing fstat on open file %s "
 568                                          "(%s)\n",
 569                                          smb_fname_str_dbg(smb_fname),
 570                                          strerror(errno) ));
 571                         }
 572                 }
 573
 574                 /* For a non-io open, this stat failing means file not found. JRA */
 575                 if (ret == -1) {
 576                         status = map_nt_error_from_unix(errno);
 577                         fd_close(fsp);
 578                         return status;
 579                 }
 580         }
 581
 582         /*
 583          * POSIX allows read-only opens of directories. We don't
 584          * want to do this (we use a different code path for this)
 585          * so catch a directory open and return an EISDIR. JRA.
 586          */
 587
 588         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 589                 fd_close(fsp);
 590                 errno = EISDIR;
 591                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 592         }
 593
 594         fsp->mode = smb_fname->st.st_ex_mode;
 595         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 596         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 597         fsp->file_pid = req ? req->smbpid : 0;
 598         fsp->can_lock = True;
 599         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 600         if (!CAN_WRITE(conn)) {
 601                 fsp->can_write = False;
 602         } else {
 603                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 604                         True : False;
 605         }
 606         fsp->print_file = NULL;
 607         fsp->modified = False;
 608         fsp->sent_oplock_break = NO_BREAK_SENT;
 609         fsp->is_directory = False;
 610         if (conn->aio_write_behind_list &&
 611             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 612                        conn->case_sensitive)) {
 613                 fsp->aio_write_behind = True;
 614         }
 615
 616         fsp->wcp = NULL; /* Write cache pointer. */
 617
 618         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 619                  conn->server_info->unix_name,
 620                  smb_fname_str_dbg(smb_fname),
 621                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 622                  conn->num_files_open));
 623
 624         errno = 0;
 625         return NT_STATUS_OK;
 626 }
 627
 628 /*******************************************************************
 629  Return True if the filename is one of the special executable types.
 630 ********************************************************************/
 631
 632 bool is_executable(const char *fname)
 633 {
 634         if ((fname = strrchr_m(fname,'.'))) {
 635                 if (strequal(fname,".com") ||
 636                     strequal(fname,".dll") ||
 637                     strequal(fname,".exe") ||
 638                     strequal(fname,".sym")) {
 639                         return True;
 640                 }
 641         }
 642         return False;
 643 }
 644
 645 /****************************************************************************
 646  Check if we can open a file with a share mode.
 647  Returns True if conflict, False if not.
 648 ****************************************************************************/
 649
 650 static bool share_conflict(struct share_mode_entry *entry,
 651                            uint32 access_mask,
 652                            uint32 share_access)
 653 {
 654         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 655                   "entry->share_access = 0x%x, "
 656                   "entry->private_options = 0x%x\n",
 657                   (unsigned int)entry->access_mask,
 658                   (unsigned int)entry->share_access,
 659                   (unsigned int)entry->private_options));
 660
 661         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 662                   (unsigned int)access_mask, (unsigned int)share_access));
 663
 664         if ((entry->access_mask & (FILE_WRITE_DATA|
 665                                    FILE_APPEND_DATA|
 666                                    FILE_READ_DATA|
 667                                    FILE_EXECUTE|
 668                                    DELETE_ACCESS)) == 0) {
 669                 DEBUG(10,("share_conflict: No conflict due to "
 670                           "entry->access_mask = 0x%x\n",
 671                           (unsigned int)entry->access_mask ));
 672                 return False;
 673         }
 674
 675         if ((access_mask & (FILE_WRITE_DATA|
 676                             FILE_APPEND_DATA|
 677                             FILE_READ_DATA|
 678                             FILE_EXECUTE|
 679                             DELETE_ACCESS)) == 0) {
 680                 DEBUG(10,("share_conflict: No conflict due to "
 681                           "access_mask = 0x%x\n",
 682                           (unsigned int)access_mask ));
 683                 return False;
 684         }
 685
 686 #if 1 /* JRA TEST - Superdebug. */
 687 #define CHECK_MASK(num, am, right, sa, share) \
 688         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 689                 (unsigned int)(num), (unsigned int)(am), \
 690                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 691         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 692                 (unsigned int)(num), (unsigned int)(sa), \
 693                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 694         if (((am) & (right)) && !((sa) & (share))) { \
 695                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 696 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 697                         (unsigned int)(share) )); \
 698                 return True; \
 699         }
 700 #else
 701 #define CHECK_MASK(num, am, right, sa, share) \
 702         if (((am) & (right)) && !((sa) & (share))) { \
 703                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 704 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 705                         (unsigned int)(share) )); \
 706                 return True; \
 707         }
 708 #endif
 709
 710         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 711                    share_access, FILE_SHARE_WRITE);
 712         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 713                    entry->share_access, FILE_SHARE_WRITE);
 714
 715         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 716                    share_access, FILE_SHARE_READ);
 717         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 718                    entry->share_access, FILE_SHARE_READ);
 719
 720         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 721                    share_access, FILE_SHARE_DELETE);
 722         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 723                    entry->share_access, FILE_SHARE_DELETE);
 724
 725         DEBUG(10,("share_conflict: No conflict.\n"));
 726         return False;
 727 }
 728
 729 #if defined(DEVELOPER)
 730 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 731                                       int num,
 732                                       struct share_mode_entry *share_entry)
 733 {
 734         files_struct *fsp;
 735
 736         if (!procid_is_me(&share_entry->pid)) {
 737                 return;
 738         }
 739
 740         if (is_deferred_open_entry(share_entry) &&
 741             !open_was_deferred(share_entry->op_mid)) {
 742                 char *str = talloc_asprintf(talloc_tos(),
 743                         "Got a deferred entry without a request: "
 744                         "PANIC: %s\n",
 745                         share_mode_str(talloc_tos(), num, share_entry));
 746                 smb_panic(str);
 747         }
 748
 749         if (!is_valid_share_mode_entry(share_entry)) {
 750                 return;
 751         }
 752
 753         fsp = file_find_dif(sconn, share_entry->id,
 754                             share_entry->share_file_id);
 755         if (!fsp) {
 756                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 757                          share_mode_str(talloc_tos(), num, share_entry) ));
 758                 smb_panic("validate_my_share_entries: Cannot match a "
 759                           "share entry with an open file\n");
 760         }
 761
 762         if (is_deferred_open_entry(share_entry) ||
 763             is_unused_share_mode_entry(share_entry)) {
 764                 goto panic;
 765         }
 766
 767         if ((share_entry->op_type == NO_OPLOCK) &&
 768             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 769                 /* Someone has already written to it, but I haven't yet
 770                  * noticed */
 771                 return;
 772         }
 773
 774         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 775                 goto panic;
 776         }
 777
 778         return;
 779
 780  panic:
 781         {
 782                 char *str;
 783                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 784                          share_mode_str(talloc_tos(), num, share_entry) ));
 785                 str = talloc_asprintf(talloc_tos(),
 786                         "validate_my_share_entries: "
 787                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 788                          fsp->fsp_name->base_name,
 789                          (unsigned int)fsp->oplock_type,
 790                          (unsigned int)share_entry->op_type );
 791                 smb_panic(str);
 792         }
 793 }
 794 #endif
 795
 796 bool is_stat_open(uint32 access_mask)
 797 {
 798         return (access_mask &&
 799                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 800                                   FILE_WRITE_ATTRIBUTES))==0) &&
 801                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 802                                  FILE_WRITE_ATTRIBUTES)) != 0));
 803 }
 804
 805 /****************************************************************************
 806  Deal with share modes
 807  Invarient: Share mode must be locked on entry and exit.
 808  Returns -1 on error, or number of share modes on success (may be zero).
 809 ****************************************************************************/
 810
 811 static NTSTATUS open_mode_check(connection_struct *conn,
 812                                 struct share_mode_lock *lck,
 813                                 uint32_t name_hash,
 814                                 uint32 access_mask,
 815                                 uint32 share_access,
 816                                 uint32 create_options,
 817                                 bool *file_existed)
 818 {
 819         int i;
 820
 821         if(lck->num_share_modes == 0) {
 822                 return NT_STATUS_OK;
 823         }
 824
 825         *file_existed = True;
 826
 827         /* A delete on close prohibits everything */
 828
 829         if (is_delete_on_close_set(lck, name_hash)) {
 830                 return NT_STATUS_DELETE_PENDING;
 831         }
 832
 833         if (is_stat_open(access_mask)) {
 834                 /* Stat open that doesn't trigger oplock breaks or share mode
 835                  * checks... ! JRA. */
 836                 return NT_STATUS_OK;
 837         }
 838
 839         /*
 840          * Check if the share modes will give us access.
 841          */
 842
 843 #if defined(DEVELOPER)
 844         for(i = 0; i < lck->num_share_modes; i++) {
 845                 validate_my_share_entries(conn->sconn, i,
 846                                           &lck->share_modes[i]);
 847         }
 848 #endif
 849
 850         if (!lp_share_modes(SNUM(conn))) {
 851                 return NT_STATUS_OK;
 852         }
 853
 854         /* Now we check the share modes, after any oplock breaks. */
 855         for(i = 0; i < lck->num_share_modes; i++) {
 856
 857                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 858                         continue;
 859                 }
 860
 861                 /* someone else has a share lock on it, check to see if we can
 862                  * too */
 863                 if (share_conflict(&lck->share_modes[i],
 864                                    access_mask, share_access)) {
 865                         return NT_STATUS_SHARING_VIOLATION;
 866                 }
 867         }
 868
 869         return NT_STATUS_OK;
 870 }
 871
 872 static bool is_delete_request(files_struct *fsp) {
 873         return ((fsp->access_mask == DELETE_ACCESS) &&
 874                 (fsp->oplock_type == NO_OPLOCK));
 875 }
 876
 877 /*
 878  * Send a break message to the oplock holder and delay the open for
 879  * our client.
 880  */
 881
 882 static NTSTATUS send_break_message(files_struct *fsp,
 883                                         struct share_mode_entry *exclusive,
 884                                         uint64_t mid,
 885                                         int oplock_request)
 886 {
 887         NTSTATUS status;
 888         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 889
 890         DEBUG(10, ("Sending break request to PID %s\n",
 891                    procid_str_static(&exclusive->pid)));
 892         exclusive->op_mid = mid;
 893
 894         /* Create the message. */
 895         share_mode_entry_to_message(msg, exclusive);
 896
 897         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 898            don't want this set in the share mode struct pointed to by lck. */
 899
 900         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 901                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
 902                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 903         }
 904
 905         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
 906                                     MSG_SMB_BREAK_REQUEST,
 907                                     (uint8 *)msg,
 908                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 909         if (!NT_STATUS_IS_OK(status)) {
 910                 DEBUG(3, ("Could not send oplock break message: %s\n",
 911                           nt_errstr(status)));
 912         }
 913
 914         return status;
 915 }
 916
 917 /*
 918  * 1) No files open at all or internal open: Grant whatever the client wants.
 919  *
 920  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
 921  *    request, break if the oplock around is a batch oplock. If it's another
 922  *    requested access type, break.
 923  *
 924  * 3) Only level2 around: Grant level2 and do nothing else.
 925  */
 926
 927 static bool delay_for_oplocks(struct share_mode_lock *lck,
 928                               files_struct *fsp,
 929                               uint64_t mid,
 930                               int pass_number,
 931                               int oplock_request)
 932 {
 933         int i;
 934         struct share_mode_entry *exclusive = NULL;
 935         bool valid_entry = false;
 936         bool have_level2 = false;
 937         bool have_a_none_oplock = false;
 938         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
 939                             lp_level2_oplocks(SNUM(fsp->conn));
 940
 941         if (oplock_request & INTERNAL_OPEN_ONLY) {
 942                 fsp->oplock_type = NO_OPLOCK;
 943         }
 944
 945         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 946                 return false;
 947         }
 948
 949         for (i=0; i<lck->num_share_modes; i++) {
 950
 951                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 952                         continue;
 953                 }
 954
 955                 /* At least one entry is not an invalid or deferred entry. */
 956                 valid_entry = true;
 957
 958                 if (pass_number == 1) {
 959                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 960                                 SMB_ASSERT(exclusive == NULL);
 961                                 exclusive = &lck->share_modes[i];
 962                         }
 963                 } else {
 964                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 965                                 SMB_ASSERT(exclusive == NULL);
 966                                 exclusive = &lck->share_modes[i];
 967                         }
 968                 }
 969
 970                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 971                         SMB_ASSERT(exclusive == NULL);
 972                         have_level2 = true;
 973                 }
 974
 975                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
 976                         have_a_none_oplock = true;
 977                 }
 978         }
 979
 980         if (exclusive != NULL) { /* Found an exclusive oplock */
 981                 bool delay_it = is_delete_request(fsp) ?
 982                                 BATCH_OPLOCK_TYPE(exclusive->op_type) : true;
 983                 SMB_ASSERT(!have_level2);
 984                 if (delay_it) {
 985                         send_break_message(fsp, exclusive, mid, oplock_request);
 986                         return true;
 987                 }
 988         }
 989
 990         /*
 991          * Match what was requested (fsp->oplock_type) with
 992          * what was found in the existing share modes.
 993          */
 994
 995         if (!valid_entry) {
 996                 /* All entries are placeholders or deferred.
 997                  * Directly grant whatever the client wants. */
 998                 if (fsp->oplock_type == NO_OPLOCK) {
 999                         /* Store a level2 oplock, but don't tell the client */
1000                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1001                 }
1002         } else if (have_a_none_oplock) {
1003                 fsp->oplock_type = NO_OPLOCK;
1004         } else if (have_level2) {
1005                 if (fsp->oplock_type == NO_OPLOCK ||
1006                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1007                         /* Store a level2 oplock, but don't tell the client */
1008                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1009                 } else {
1010                         fsp->oplock_type = LEVEL_II_OPLOCK;
1011                 }
1012         } else {
1013                 /* This case can never happen. */
1014                 SMB_ASSERT(1);
1015         }
1016
1017         /*
1018          * Don't grant level2 to clients that don't want them
1019          * or if we've turned them off.
1020          */
1021         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1022                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1023         }
1024
1025         DEBUG(10,("delay_for_oplocks: oplock type 0x%x on file %s\n",
1026                   fsp->oplock_type, fsp_str_dbg(fsp)));
1027
1028         /* No delay. */
1029         return false;
1030 }
1031
1032 bool request_timed_out(struct timeval request_time,
1033                        struct timeval timeout)
1034 {
1035         struct timeval now, end_time;
1036         GetTimeOfDay(&now);
1037         end_time = timeval_sum(&request_time, &timeout);
1038         return (timeval_compare(&end_time, &now) < 0);
1039 }
1040
1041 /****************************************************************************
1042  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1043 ****************************************************************************/
1044
1045 static void defer_open(struct share_mode_lock *lck,
1046                        struct timeval request_time,
1047                        struct timeval timeout,
1048                        struct smb_request *req,
1049                        struct deferred_open_record *state)
1050 {
1051         int i;
1052
1053         /* Paranoia check */
1054
1055         for (i=0; i<lck->num_share_modes; i++) {
1056                 struct share_mode_entry *e = &lck->share_modes[i];
1057
1058                 if (!is_deferred_open_entry(e)) {
1059                         continue;
1060                 }
1061
1062                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1063                         DEBUG(0, ("Trying to defer an already deferred "
1064                                 "request: mid=%llu, exiting\n",
1065                                 (unsigned long long)req->mid));
1066                         exit_server("attempt to defer a deferred request");
1067                 }
1068         }
1069
1070         /* End paranoia check */
1071
1072         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1073                   "open entry for mid %llu\n",
1074                   (unsigned int)request_time.tv_sec,
1075                   (unsigned int)request_time.tv_usec,
1076                   (unsigned long long)req->mid));
1077
1078         if (!push_deferred_open_message_smb(req, request_time, timeout,
1079                                        state->id, (char *)state, sizeof(*state))) {
1080                 exit_server("push_deferred_open_message_smb failed");
1081         }
1082         add_deferred_open(lck, req->mid, request_time,
1083                           sconn_server_id(req->sconn), state->id);
1084 }
1085
1086
1087 /****************************************************************************
1088  On overwrite open ensure that the attributes match.
1089 ****************************************************************************/
1090
1091 bool open_match_attributes(connection_struct *conn,
1092                            uint32 old_dos_attr,
1093                            uint32 new_dos_attr,
1094                            mode_t existing_unx_mode,
1095                            mode_t new_unx_mode,
1096                            mode_t *returned_unx_mode)
1097 {
1098         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1099
1100         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1101         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1102
1103         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1104            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1105                 *returned_unx_mode = new_unx_mode;
1106         } else {
1107                 *returned_unx_mode = (mode_t)0;
1108         }
1109
1110         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1111                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1112                   "returned_unx_mode = 0%o\n",
1113                   (unsigned int)old_dos_attr,
1114                   (unsigned int)existing_unx_mode,
1115                   (unsigned int)new_dos_attr,
1116                   (unsigned int)*returned_unx_mode ));
1117
1118         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1119         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1120                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1121                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1122                         return False;
1123                 }
1124         }
1125         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1126                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1127                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1128                         return False;
1129                 }
1130         }
1131         return True;
1132 }
1133
1134 /****************************************************************************
1135  Special FCB or DOS processing in the case of a sharing violation.
1136  Try and find a duplicated file handle.
1137 ****************************************************************************/
1138
1139 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1140                                      connection_struct *conn,
1141                                      files_struct *fsp_to_dup_into,
1142                                      const struct smb_filename *smb_fname,
1143                                      struct file_id id,
1144                                      uint16 file_pid,
1145                                      uint16 vuid,
1146                                      uint32 access_mask,
1147                                      uint32 share_access,
1148                                      uint32 create_options)
1149 {
1150         files_struct *fsp;
1151
1152         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1153                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1154
1155         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1156             fsp = file_find_di_next(fsp)) {
1157
1158                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1159                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1160                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1161                           fsp->fh->fd, (unsigned int)fsp->vuid,
1162                           (unsigned int)fsp->file_pid,
1163                           (unsigned int)fsp->fh->private_options,
1164                           (unsigned int)fsp->access_mask ));
1165
1166                 if (fsp->fh->fd != -1 &&
1167                     fsp->vuid == vuid &&
1168                     fsp->file_pid == file_pid &&
1169                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1170                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1171                     (fsp->access_mask & FILE_WRITE_DATA) &&
1172                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1173                     strequal(fsp->fsp_name->stream_name,
1174                              smb_fname->stream_name)) {
1175                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1176                         break;
1177                 }
1178         }
1179
1180         if (!fsp) {
1181                 return NT_STATUS_NOT_FOUND;
1182         }
1183
1184         /* quite an insane set of semantics ... */
1185         if (is_executable(smb_fname->base_name) &&
1186             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1187                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1188                 return NT_STATUS_INVALID_PARAMETER;
1189         }
1190
1191         /* We need to duplicate this fsp. */
1192         return dup_file_fsp(req, fsp, access_mask, share_access,
1193                             create_options, fsp_to_dup_into);
1194 }
1195
1196 /****************************************************************************
1197  Open a file with a share mode - old openX method - map into NTCreate.
1198 ****************************************************************************/
1199
1200 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1201                                  int deny_mode, int open_func,
1202                                  uint32 *paccess_mask,
1203                                  uint32 *pshare_mode,
1204                                  uint32 *pcreate_disposition,
1205                                  uint32 *pcreate_options,
1206                                  uint32_t *pprivate_flags)
1207 {
1208         uint32 access_mask;
1209         uint32 share_mode;
1210         uint32 create_disposition;
1211         uint32 create_options = FILE_NON_DIRECTORY_FILE;
1212         uint32_t private_flags = 0;
1213
1214         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1215                   "open_func = 0x%x\n",
1216                   smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1217                   (unsigned int)open_func ));
1218
1219         /* Create the NT compatible access_mask. */
1220         switch (GET_OPENX_MODE(deny_mode)) {
1221                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1222                 case DOS_OPEN_RDONLY:
1223                         access_mask = FILE_GENERIC_READ;
1224                         break;
1225                 case DOS_OPEN_WRONLY:
1226                         access_mask = FILE_GENERIC_WRITE;
1227                         break;
1228                 case DOS_OPEN_RDWR:
1229                 case DOS_OPEN_FCB:
1230                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1231                         break;
1232                 default:
1233                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1234                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
1235                         return False;
1236         }
1237
1238         /* Create the NT compatible create_disposition. */
1239         switch (open_func) {
1240                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1241                         create_disposition = FILE_CREATE;
1242                         break;
1243
1244                 case OPENX_FILE_EXISTS_OPEN:
1245                         create_disposition = FILE_OPEN;
1246                         break;
1247
1248                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1249                         create_disposition = FILE_OPEN_IF;
1250                         break;
1251
1252                 case OPENX_FILE_EXISTS_TRUNCATE:
1253                         create_disposition = FILE_OVERWRITE;
1254                         break;
1255
1256                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1257                         create_disposition = FILE_OVERWRITE_IF;
1258                         break;
1259
1260                 default:
1261                         /* From samba4 - to be confirmed. */
1262                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1263                                 create_disposition = FILE_CREATE;
1264                                 break;
1265                         }
1266                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1267                                   "open_func 0x%x\n", (unsigned int)open_func));
1268                         return False;
1269         }
1270
1271         /* Create the NT compatible share modes. */
1272         switch (GET_DENY_MODE(deny_mode)) {
1273                 case DENY_ALL:
1274                         share_mode = FILE_SHARE_NONE;
1275                         break;
1276
1277                 case DENY_WRITE:
1278                         share_mode = FILE_SHARE_READ;
1279                         break;
1280
1281                 case DENY_READ:
1282                         share_mode = FILE_SHARE_WRITE;
1283                         break;
1284
1285                 case DENY_NONE:
1286                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1287                         break;
1288
1289                 case DENY_DOS:
1290                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1291                         if (is_executable(smb_fname->base_name)) {
1292                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1293                         } else {
1294                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1295                                         share_mode = FILE_SHARE_READ;
1296                                 } else {
1297                                         share_mode = FILE_SHARE_NONE;
1298                                 }
1299                         }
1300                         break;
1301
1302                 case DENY_FCB:
1303                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1304                         share_mode = FILE_SHARE_NONE;
1305                         break;
1306
1307                 default:
1308                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1309                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1310                         return False;
1311         }
1312
1313         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1314                   "share_mode = 0x%x, create_disposition = 0x%x, "
1315                   "create_options = 0x%x private_flags = 0x%x\n",
1316                   smb_fname_str_dbg(smb_fname),
1317                   (unsigned int)access_mask,
1318                   (unsigned int)share_mode,
1319                   (unsigned int)create_disposition,
1320                   (unsigned int)create_options,
1321                   (unsigned int)private_flags));
1322
1323         if (paccess_mask) {
1324                 *paccess_mask = access_mask;
1325         }
1326         if (pshare_mode) {
1327                 *pshare_mode = share_mode;
1328         }
1329         if (pcreate_disposition) {
1330                 *pcreate_disposition = create_disposition;
1331         }
1332         if (pcreate_options) {
1333                 *pcreate_options = create_options;
1334         }
1335         if (pprivate_flags) {
1336                 *pprivate_flags = private_flags;
1337         }
1338
1339         return True;
1340
1341 }
1342
1343 static void schedule_defer_open(struct share_mode_lock *lck,
1344                                 struct timeval request_time,
1345                                 struct smb_request *req)
1346 {
1347         struct deferred_open_record state;
1348
1349         /* This is a relative time, added to the absolute
1350            request_time value to get the absolute timeout time.
1351            Note that if this is the second or greater time we enter
1352            this codepath for this particular request mid then
1353            request_time is left as the absolute time of the *first*
1354            time this request mid was processed. This is what allows
1355            the request to eventually time out. */
1356
1357         struct timeval timeout;
1358
1359         /* Normally the smbd we asked should respond within
1360          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1361          * the client did, give twice the timeout as a safety
1362          * measure here in case the other smbd is stuck
1363          * somewhere else. */
1364
1365         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1366
1367         /* Nothing actually uses state.delayed_for_oplocks
1368            but it's handy to differentiate in debug messages
1369            between a 30 second delay due to oplock break, and
1370            a 1 second delay for share mode conflicts. */
1371
1372         state.delayed_for_oplocks = True;
1373         state.id = lck->id;
1374
1375         if (!request_timed_out(request_time, timeout)) {
1376                 defer_open(lck, request_time, timeout, req, &state);
1377         }
1378 }
1379
1380 /****************************************************************************
1381  Work out what access_mask to use from what the client sent us.
1382 ****************************************************************************/
1383
1384 static NTSTATUS calculate_access_mask(connection_struct *conn,
1385                                         const struct smb_filename *smb_fname,
1386                                         bool file_existed,
1387                                         uint32_t access_mask,
1388                                         uint32_t *access_mask_out)
1389 {
1390         NTSTATUS status;
1391
1392         /*
1393          * Convert GENERIC bits to specific bits.
1394          */
1395
1396         se_map_generic(&access_mask, &file_generic_mapping);
1397
1398         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1399         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1400                 if (file_existed) {
1401
1402                         struct security_descriptor *sd;
1403                         uint32_t access_granted = 0;
1404
1405                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1406                                         (SECINFO_OWNER |
1407                                         SECINFO_GROUP |
1408                                         SECINFO_DACL),&sd);
1409
1410                         if (!NT_STATUS_IS_OK(status)) {
1411                                 DEBUG(10, ("calculate_access_mask: Could not get acl "
1412                                         "on file %s: %s\n",
1413                                         smb_fname_str_dbg(smb_fname),
1414                                         nt_errstr(status)));
1415                                 return NT_STATUS_ACCESS_DENIED;
1416                         }
1417
1418                         status = smb1_file_se_access_check(conn,
1419                                         sd,
1420                                         get_current_nttok(conn),
1421                                         access_mask,
1422                                         &access_granted);
1423
1424                         TALLOC_FREE(sd);
1425
1426                         if (!NT_STATUS_IS_OK(status)) {
1427                                 DEBUG(10, ("calculate_access_mask: Access denied on "
1428                                         "file %s: when calculating maximum access\n",
1429                                         smb_fname_str_dbg(smb_fname)));
1430                                 return NT_STATUS_ACCESS_DENIED;
1431                         }
1432
1433                         access_mask = access_granted;
1434                 } else {
1435                         access_mask = FILE_GENERIC_ALL;
1436                 }
1437         }
1438
1439         *access_mask_out = access_mask;
1440         return NT_STATUS_OK;
1441 }
1442
1443 /****************************************************************************
1444  Remove the deferred open entry under lock.
1445 ****************************************************************************/
1446
1447 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1448                                 struct server_id pid)
1449 {
1450         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1451                         NULL, NULL, NULL);
1452         if (lck == NULL) {
1453                 DEBUG(0, ("could not get share mode lock\n"));
1454         } else {
1455                 del_deferred_open_entry(lck, mid, pid);
1456                 TALLOC_FREE(lck);
1457         }
1458 }
1459
1460 /****************************************************************************
1461  Open a file with a share mode. Passed in an already created files_struct *.
1462 ****************************************************************************/
1463
1464 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1465                             struct smb_request *req,
1466                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1467                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1468                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1469                             uint32 create_options,      /* options such as delete on close. */
1470                             uint32 new_dos_attributes,  /* attributes used for new file. */
1471                             int oplock_request,         /* internal Samba oplock codes. */
1472                                                         /* Information (FILE_EXISTS etc.) */
1473                             uint32_t private_flags,     /* Samba specific flags. */
1474                             int *pinfo,
1475                             files_struct *fsp)
1476 {
1477         struct smb_filename *smb_fname = fsp->fsp_name;
1478         int flags=0;
1479         int flags2=0;
1480         bool file_existed = VALID_STAT(smb_fname->st);
1481         bool def_acl = False;
1482         bool posix_open = False;
1483         bool new_file_created = False;
1484         bool clear_ads = false;
1485         struct file_id id;
1486         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1487         mode_t new_unx_mode = (mode_t)0;
1488         mode_t unx_mode = (mode_t)0;
1489         int info;
1490         uint32 existing_dos_attributes = 0;
1491         struct timeval request_time = timeval_zero();
1492         struct share_mode_lock *lck = NULL;
1493         uint32 open_access_mask = access_mask;
1494         NTSTATUS status;
1495         char *parent_dir;
1496
1497         ZERO_STRUCT(id);
1498
1499         /* Windows allows a new file to be created and
1500            silently removes a FILE_ATTRIBUTE_DIRECTORY
1501            sent by the client. Do the same. */
1502
1503         new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1504
1505         if (conn->printer) {
1506                 /*
1507                  * Printers are handled completely differently.
1508                  * Most of the passed parameters are ignored.
1509                  */
1510
1511                 if (pinfo) {
1512                         *pinfo = FILE_WAS_CREATED;
1513                 }
1514
1515                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1516                            smb_fname_str_dbg(smb_fname)));
1517
1518                 if (!req) {
1519                         DEBUG(0,("open_file_ntcreate: printer open without "
1520                                 "an SMB request!\n"));
1521                         return NT_STATUS_INTERNAL_ERROR;
1522                 }
1523
1524                 return print_spool_open(fsp, smb_fname->base_name,
1525                                         req->vuid);
1526         }
1527
1528         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1529                             NULL)) {
1530                 return NT_STATUS_NO_MEMORY;
1531         }
1532
1533         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1534                 posix_open = True;
1535                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1536                 new_dos_attributes = 0;
1537         } else {
1538                 /* We add aARCH to this as this mode is only used if the file is
1539                  * created new. */
1540                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1541                                      smb_fname, parent_dir);
1542         }
1543
1544         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1545                    "access_mask=0x%x share_access=0x%x "
1546                    "create_disposition = 0x%x create_options=0x%x "
1547                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1548                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1549                    access_mask, share_access, create_disposition,
1550                    create_options, (unsigned int)unx_mode, oplock_request,
1551                    (unsigned int)private_flags));
1552
1553         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1554                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1555                 return NT_STATUS_INTERNAL_ERROR;
1556         }
1557
1558         /*
1559          * Only non-internal opens can be deferred at all
1560          */
1561
1562         if (req) {
1563                 void *ptr;
1564                 if (get_deferred_open_message_state(req,
1565                                 &request_time,
1566                                 &ptr)) {
1567
1568                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1569                         /* Remember the absolute time of the original
1570                            request with this mid. We'll use it later to
1571                            see if this has timed out. */
1572
1573                         /* Remove the deferred open entry under lock. */
1574                         remove_deferred_open_entry(
1575                                 state->id, req->mid,
1576                                 sconn_server_id(req->sconn));
1577
1578                         /* Ensure we don't reprocess this message. */
1579                         remove_deferred_open_message_smb(req->mid);
1580                 }
1581         }
1582
1583         status = check_name(conn, smb_fname->base_name);
1584         if (!NT_STATUS_IS_OK(status)) {
1585                 return status;
1586         }
1587
1588         if (!posix_open) {
1589                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1590                 if (file_existed) {
1591                         existing_dos_attributes = dos_mode(conn, smb_fname);
1592                 }
1593         }
1594
1595         /* ignore any oplock requests if oplocks are disabled */
1596         if (!lp_oplocks(SNUM(conn)) ||
1597             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1598                 /* Mask off everything except the private Samba bits. */
1599                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1600         }
1601
1602         /* this is for OS/2 long file names - say we don't support them */
1603         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1604                 /* OS/2 Workplace shell fix may be main code stream in a later
1605                  * release. */
1606                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1607                          "supported.\n"));
1608                 if (use_nt_status()) {
1609                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1610                 }
1611                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1612         }
1613
1614         switch( create_disposition ) {
1615                 /*
1616                  * Currently we're using FILE_SUPERSEDE as the same as
1617                  * FILE_OVERWRITE_IF but they really are
1618                  * different. FILE_SUPERSEDE deletes an existing file
1619                  * (requiring delete access) then recreates it.
1620                  */
1621                 case FILE_SUPERSEDE:
1622                         /* If file exists replace/overwrite. If file doesn't
1623                          * exist create. */
1624                         flags2 |= (O_CREAT | O_TRUNC);
1625                         clear_ads = true;
1626                         break;
1627
1628                 case FILE_OVERWRITE_IF:
1629                         /* If file exists replace/overwrite. If file doesn't
1630                          * exist create. */
1631                         flags2 |= (O_CREAT | O_TRUNC);
1632                         clear_ads = true;
1633                         break;
1634
1635                 case FILE_OPEN:
1636                         /* If file exists open. If file doesn't exist error. */
1637                         if (!file_existed) {
1638                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1639                                          "requested for file %s and file "
1640                                          "doesn't exist.\n",
1641                                          smb_fname_str_dbg(smb_fname)));
1642                                 errno = ENOENT;
1643                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1644                         }
1645                         break;
1646
1647                 case FILE_OVERWRITE:
1648                         /* If file exists overwrite. If file doesn't exist
1649                          * error. */
1650                         if (!file_existed) {
1651                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1652                                          "requested for file %s and file "
1653                                          "doesn't exist.\n",
1654                                          smb_fname_str_dbg(smb_fname) ));
1655                                 errno = ENOENT;
1656                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1657                         }
1658                         flags2 |= O_TRUNC;
1659                         clear_ads = true;
1660                         break;
1661
1662                 case FILE_CREATE:
1663                         /* If file exists error. If file doesn't exist
1664                          * create. */
1665                         if (file_existed) {
1666                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1667                                          "requested for file %s and file "
1668                                          "already exists.\n",
1669                                          smb_fname_str_dbg(smb_fname)));
1670                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1671                                         errno = EISDIR;
1672                                 } else {
1673                                         errno = EEXIST;
1674                                 }
1675                                 return map_nt_error_from_unix(errno);
1676                         }
1677                         flags2 |= (O_CREAT|O_EXCL);
1678                         break;
1679
1680                 case FILE_OPEN_IF:
1681                         /* If file exists open. If file doesn't exist
1682                          * create. */
1683                         flags2 |= O_CREAT;
1684                         break;
1685
1686                 default:
1687                         return NT_STATUS_INVALID_PARAMETER;
1688         }
1689
1690         /* We only care about matching attributes on file exists and
1691          * overwrite. */
1692
1693         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1694                              (create_disposition == FILE_OVERWRITE_IF))) {
1695                 if (!open_match_attributes(conn, existing_dos_attributes,
1696                                            new_dos_attributes,
1697                                            smb_fname->st.st_ex_mode,
1698                                            unx_mode, &new_unx_mode)) {
1699                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1700                                  "for file %s (%x %x) (0%o, 0%o)\n",
1701                                  smb_fname_str_dbg(smb_fname),
1702                                  existing_dos_attributes,
1703                                  new_dos_attributes,
1704                                  (unsigned int)smb_fname->st.st_ex_mode,
1705                                  (unsigned int)unx_mode ));
1706                         errno = EACCES;
1707                         return NT_STATUS_ACCESS_DENIED;
1708                 }
1709         }
1710
1711         status = calculate_access_mask(conn, smb_fname, file_existed,
1712                                         access_mask,
1713                                         &access_mask);
1714         if (!NT_STATUS_IS_OK(status)) {
1715                 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1716                         "on file %s returned %s\n",
1717                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1718                 return status;
1719         }
1720
1721         open_access_mask = access_mask;
1722
1723         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1724                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1725         }
1726
1727         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1728                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1729                     access_mask));
1730
1731         /*
1732          * Note that we ignore the append flag as append does not
1733          * mean the same thing under DOS and Unix.
1734          */
1735
1736         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1737                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1738                 /* DENY_DOS opens are always underlying read-write on the
1739                    file handle, no matter what the requested access mask
1740                     says. */
1741                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1742                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1743                         flags = O_RDWR;
1744                 } else {
1745                         flags = O_WRONLY;
1746                 }
1747         } else {
1748                 flags = O_RDONLY;
1749         }
1750
1751         /*
1752          * Currently we only look at FILE_WRITE_THROUGH for create options.
1753          */
1754
1755 #if defined(O_SYNC)
1756         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1757                 flags2 |= O_SYNC;
1758         }
1759 #endif /* O_SYNC */
1760
1761         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1762                 flags2 |= O_APPEND;
1763         }
1764
1765         if (!posix_open && !CAN_WRITE(conn)) {
1766                 /*
1767                  * We should really return a permission denied error if either
1768                  * O_CREAT or O_TRUNC are set, but for compatibility with
1769                  * older versions of Samba we just AND them out.
1770                  */
1771                 flags2 &= ~(O_CREAT|O_TRUNC);
1772         }
1773
1774         /*
1775          * Ensure we can't write on a read-only share or file.
1776          */
1777
1778         if (flags != O_RDONLY && file_existed &&
1779             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1780                 DEBUG(5,("open_file_ntcreate: write access requested for "
1781                          "file %s on read only %s\n",
1782                          smb_fname_str_dbg(smb_fname),
1783                          !CAN_WRITE(conn) ? "share" : "file" ));
1784                 errno = EACCES;
1785                 return NT_STATUS_ACCESS_DENIED;
1786         }
1787
1788         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1789         fsp->share_access = share_access;
1790         fsp->fh->private_options = private_flags;
1791         fsp->access_mask = open_access_mask; /* We change this to the
1792                                               * requested access_mask after
1793                                               * the open is done. */
1794         fsp->posix_open = posix_open;
1795
1796         /* Ensure no SAMBA_PRIVATE bits can be set. */
1797         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1798
1799         if (timeval_is_zero(&request_time)) {
1800                 request_time = fsp->open_time;
1801         }
1802
1803         if (file_existed) {
1804                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1805                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1806
1807                 lck = get_share_mode_lock(talloc_tos(), id,
1808                                           conn->connectpath,
1809                                           smb_fname, &old_write_time);
1810
1811                 if (lck == NULL) {
1812                         DEBUG(0, ("Could not get share mode lock\n"));
1813                         return NT_STATUS_SHARING_VIOLATION;
1814                 }
1815
1816                 /* First pass - send break only on batch oplocks. */
1817                 if ((req != NULL)
1818                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1819                                          oplock_request)) {
1820                         schedule_defer_open(lck, request_time, req);
1821                         TALLOC_FREE(lck);
1822                         return NT_STATUS_SHARING_VIOLATION;
1823                 }
1824
1825                 /* Use the client requested access mask here, not the one we
1826                  * open with. */
1827                 status = open_mode_check(conn, lck, fsp->name_hash,
1828                                         access_mask, share_access,
1829                                          create_options, &file_existed);
1830
1831                 if (NT_STATUS_IS_OK(status)) {
1832                         /* We might be going to allow this open. Check oplock
1833                          * status again. */
1834                         /* Second pass - send break for both batch or
1835                          * exclusive oplocks. */
1836                         if ((req != NULL)
1837                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1838                                                   oplock_request)) {
1839                                 schedule_defer_open(lck, request_time, req);
1840                                 TALLOC_FREE(lck);
1841                                 return NT_STATUS_SHARING_VIOLATION;
1842                         }
1843                 }
1844
1845                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1846                         /* DELETE_PENDING is not deferred for a second */
1847                         TALLOC_FREE(lck);
1848                         return status;
1849                 }
1850
1851                 if (!NT_STATUS_IS_OK(status)) {
1852                         uint32 can_access_mask;
1853                         bool can_access = True;
1854
1855                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1856
1857                         /* Check if this can be done with the deny_dos and fcb
1858                          * calls. */
1859                         if (private_flags &
1860                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1861                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1862                                 if (req == NULL) {
1863                                         DEBUG(0, ("DOS open without an SMB "
1864                                                   "request!\n"));
1865                                         TALLOC_FREE(lck);
1866                                         return NT_STATUS_INTERNAL_ERROR;
1867                                 }
1868
1869                                 /* Use the client requested access mask here,
1870                                  * not the one we open with. */
1871                                 status = fcb_or_dos_open(req,
1872                                                         conn,
1873                                                         fsp,
1874                                                         smb_fname,
1875                                                         id,
1876                                                         req->smbpid,
1877                                                         req->vuid,
1878                                                         access_mask,
1879                                                         share_access,
1880                                                         create_options);
1881
1882                                 if (NT_STATUS_IS_OK(status)) {
1883                                         TALLOC_FREE(lck);
1884                                         if (pinfo) {
1885                                                 *pinfo = FILE_WAS_OPENED;
1886                                         }
1887                                         return NT_STATUS_OK;
1888                                 }
1889                         }
1890
1891                         /*
1892                          * This next line is a subtlety we need for
1893                          * MS-Access. If a file open will fail due to share
1894                          * permissions and also for security (access) reasons,
1895                          * we need to return the access failed error, not the
1896                          * share error. We can't open the file due to kernel
1897                          * oplock deadlock (it's possible we failed above on
1898                          * the open_mode_check()) so use a userspace check.
1899                          */
1900
1901                         if (flags & O_RDWR) {
1902                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1903                         } else if (flags & O_WRONLY) {
1904                                 can_access_mask = FILE_WRITE_DATA;
1905                         } else {
1906                                 can_access_mask = FILE_READ_DATA;
1907                         }
1908
1909                         if (((can_access_mask & FILE_WRITE_DATA) &&
1910                                 !CAN_WRITE(conn)) ||
1911                             !can_access_file_data(conn, smb_fname,
1912                                                   can_access_mask)) {
1913                                 can_access = False;
1914                         }
1915
1916                         /*
1917                          * If we're returning a share violation, ensure we
1918                          * cope with the braindead 1 second delay.
1919                          */
1920
1921                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1922                             lp_defer_sharing_violations()) {
1923                                 struct timeval timeout;
1924                                 struct deferred_open_record state;
1925                                 int timeout_usecs;
1926
1927                                 /* this is a hack to speed up torture tests
1928                                    in 'make test' */
1929                                 timeout_usecs = lp_parm_int(SNUM(conn),
1930                                                             "smbd","sharedelay",
1931                                                             SHARING_VIOLATION_USEC_WAIT);
1932
1933                                 /* This is a relative time, added to the absolute
1934                                    request_time value to get the absolute timeout time.
1935                                    Note that if this is the second or greater time we enter
1936                                    this codepath for this particular request mid then
1937                                    request_time is left as the absolute time of the *first*
1938                                    time this request mid was processed. This is what allows
1939                                    the request to eventually time out. */
1940
1941                                 timeout = timeval_set(0, timeout_usecs);
1942
1943                                 /* Nothing actually uses state.delayed_for_oplocks
1944                                    but it's handy to differentiate in debug messages
1945                                    between a 30 second delay due to oplock break, and
1946                                    a 1 second delay for share mode conflicts. */
1947
1948                                 state.delayed_for_oplocks = False;
1949                                 state.id = id;
1950
1951                                 if ((req != NULL)
1952                                     && !request_timed_out(request_time,
1953                                                           timeout)) {
1954                                         defer_open(lck, request_time, timeout,
1955                                                    req, &state);
1956                                 }
1957                         }
1958
1959                         TALLOC_FREE(lck);
1960                         if (can_access) {
1961                                 /*
1962                                  * We have detected a sharing violation here
1963                                  * so return the correct error code
1964                                  */
1965                                 status = NT_STATUS_SHARING_VIOLATION;
1966                         } else {
1967                                 status = NT_STATUS_ACCESS_DENIED;
1968                         }
1969                         return status;
1970                 }
1971
1972                 /*
1973                  * We exit this block with the share entry *locked*.....
1974                  */
1975         }
1976
1977         SMB_ASSERT(!file_existed || (lck != NULL));
1978
1979         /*
1980          * Ensure we pay attention to default ACLs on directories if required.
1981          */
1982
1983         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1984             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1985                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
1986         }
1987
1988         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1989                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1990                  (unsigned int)flags, (unsigned int)flags2,
1991                  (unsigned int)unx_mode, (unsigned int)access_mask,
1992                  (unsigned int)open_access_mask));
1993
1994         /*
1995          * open_file strips any O_TRUNC flags itself.
1996          */
1997
1998         fsp_open = open_file(fsp, conn, req, parent_dir,
1999                              flags|flags2, unx_mode, access_mask,
2000                              open_access_mask);
2001
2002         if (!NT_STATUS_IS_OK(fsp_open)) {
2003                 if (lck != NULL) {
2004                         TALLOC_FREE(lck);
2005                 }
2006                 return fsp_open;
2007         }
2008
2009         if (!file_existed) {
2010                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2011                 /*
2012                  * Deal with the race condition where two smbd's detect the
2013                  * file doesn't exist and do the create at the same time. One
2014                  * of them will win and set a share mode, the other (ie. this
2015                  * one) should check if the requested share mode for this
2016                  * create is allowed.
2017                  */
2018
2019                 /*
2020                  * Now the file exists and fsp is successfully opened,
2021                  * fsp->dev and fsp->inode are valid and should replace the
2022                  * dev=0,inode=0 from a non existent file. Spotted by
2023                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2024                  */
2025
2026                 id = fsp->file_id;
2027
2028                 lck = get_share_mode_lock(talloc_tos(), id,
2029                                           conn->connectpath,
2030                                           smb_fname, &old_write_time);
2031
2032                 if (lck == NULL) {
2033                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2034                                   "mode lock for %s\n",
2035                                   smb_fname_str_dbg(smb_fname)));
2036                         fd_close(fsp);
2037                         return NT_STATUS_SHARING_VIOLATION;
2038                 }
2039
2040                 /* First pass - send break only on batch oplocks. */
2041                 if ((req != NULL)
2042                     && delay_for_oplocks(lck, fsp, req->mid, 1,
2043                                          oplock_request)) {
2044                         schedule_defer_open(lck, request_time, req);
2045                         TALLOC_FREE(lck);
2046                         fd_close(fsp);
2047                         return NT_STATUS_SHARING_VIOLATION;
2048                 }
2049
2050                 status = open_mode_check(conn, lck, fsp->name_hash,
2051                                         access_mask, share_access,
2052                                          create_options, &file_existed);
2053
2054                 if (NT_STATUS_IS_OK(status)) {
2055                         /* We might be going to allow this open. Check oplock
2056                          * status again. */
2057                         /* Second pass - send break for both batch or
2058                          * exclusive oplocks. */
2059                         if ((req != NULL)
2060                             && delay_for_oplocks(lck, fsp, req->mid, 2,
2061                                                  oplock_request)) {
2062                                 schedule_defer_open(lck, request_time, req);
2063                                 TALLOC_FREE(lck);
2064                                 fd_close(fsp);
2065                                 return NT_STATUS_SHARING_VIOLATION;
2066                         }
2067                 }
2068
2069                 if (!NT_STATUS_IS_OK(status)) {
2070                         struct deferred_open_record state;
2071
2072                         fd_close(fsp);
2073
2074                         state.delayed_for_oplocks = False;
2075                         state.id = id;
2076
2077                         /* Do it all over again immediately. In the second
2078                          * round we will find that the file existed and handle
2079                          * the DELETE_PENDING and FCB cases correctly. No need
2080                          * to duplicate the code here. Essentially this is a
2081                          * "goto top of this function", but don't tell
2082                          * anybody... */
2083
2084                         if (req != NULL) {
2085                                 defer_open(lck, request_time, timeval_zero(),
2086                                            req, &state);
2087                         }
2088                         TALLOC_FREE(lck);
2089                         return status;
2090                 }
2091
2092                 /*
2093                  * We exit this block with the share entry *locked*.....
2094                  */
2095
2096         }
2097
2098         SMB_ASSERT(lck != NULL);
2099
2100         /* Delete streams if create_disposition requires it */
2101         if (file_existed && clear_ads &&
2102             !is_ntfs_stream_smb_fname(smb_fname)) {
2103                 status = delete_all_streams(conn, smb_fname->base_name);
2104                 if (!NT_STATUS_IS_OK(status)) {
2105                         TALLOC_FREE(lck);
2106                         fd_close(fsp);
2107                         return status;
2108                 }
2109         }
2110
2111         /* note that we ignore failure for the following. It is
2112            basically a hack for NFS, and NFS will never set one of
2113            these only read them. Nobody but Samba can ever set a deny
2114            mode and we have already checked our more authoritative
2115            locking database for permission to set this deny mode. If
2116            the kernel refuses the operations then the kernel is wrong.
2117            note that GPFS supports it as well - jmcd */
2118
2119         if (fsp->fh->fd != -1) {
2120                 int ret_flock;
2121                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2122                 if(ret_flock == -1 ){
2123
2124                         TALLOC_FREE(lck);
2125                         fd_close(fsp);
2126
2127                         return NT_STATUS_SHARING_VIOLATION;
2128                 }
2129         }
2130
2131         /*
2132          * At this point onwards, we can guarentee that the share entry
2133          * is locked, whether we created the file or not, and that the
2134          * deny mode is compatible with all current opens.
2135          */
2136
2137         /*
2138          * If requested, truncate the file.
2139          */
2140
2141         if (file_existed && (flags2&O_TRUNC)) {
2142                 /*
2143                  * We are modifing the file after open - update the stat
2144                  * struct..
2145                  */
2146                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2147                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2148                         status = map_nt_error_from_unix(errno);
2149                         TALLOC_FREE(lck);
2150                         fd_close(fsp);
2151                         return status;
2152                 }
2153         }
2154
2155         /*
2156          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2157          */
2158         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2159
2160         if (file_existed) {
2161                 /* stat opens on existing files don't get oplocks. */
2162                 if (is_stat_open(open_access_mask)) {
2163                         fsp->oplock_type = NO_OPLOCK;
2164                 }
2165
2166                 if (!(flags2 & O_TRUNC)) {
2167                         info = FILE_WAS_OPENED;
2168                 } else {
2169                         info = FILE_WAS_OVERWRITTEN;
2170                 }
2171         } else {
2172                 info = FILE_WAS_CREATED;
2173         }
2174
2175         if (pinfo) {
2176                 *pinfo = info;
2177         }
2178
2179         /*
2180          * Setup the oplock info in both the shared memory and
2181          * file structs.
2182          */
2183
2184         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2185                 /* Could not get the kernel oplock */
2186                 fsp->oplock_type = NO_OPLOCK;
2187         }
2188
2189         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2190                 new_file_created = True;
2191         }
2192
2193         set_share_mode(lck, fsp, get_current_uid(conn), 0,
2194                        fsp->oplock_type);
2195
2196         /* Handle strange delete on close create semantics. */
2197         if (create_options & FILE_DELETE_ON_CLOSE) {
2198
2199                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2200
2201                 if (!NT_STATUS_IS_OK(status)) {
2202                         /* Remember to delete the mode we just added. */
2203                         del_share_mode(lck, fsp);
2204                         TALLOC_FREE(lck);
2205                         fd_close(fsp);
2206                         return status;
2207                 }
2208                 /* Note that here we set the *inital* delete on close flag,
2209                    not the regular one. The magic gets handled in close. */
2210                 fsp->initial_delete_on_close = True;
2211         }
2212
2213         if (new_file_created) {
2214                 /* Files should be initially set as archive */
2215                 if (lp_map_archive(SNUM(conn)) ||
2216                     lp_store_dos_attributes(SNUM(conn))) {
2217                         if (!posix_open) {
2218                                 if (file_set_dosmode(conn, smb_fname,
2219                                             new_dos_attributes | aARCH,
2220                                             parent_dir, true) == 0) {
2221                                         unx_mode = smb_fname->st.st_ex_mode;
2222                                 }
2223                         }
2224                 }
2225         }
2226
2227         /* Determine sparse flag. */
2228         if (posix_open) {
2229                 /* POSIX opens are sparse by default. */
2230                 fsp->is_sparse = true;
2231         } else {
2232                 fsp->is_sparse = (file_existed &&
2233                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2234         }
2235
2236         /*
2237          * Take care of inherited ACLs on created files - if default ACL not
2238          * selected.
2239          */
2240
2241         if (!posix_open && !file_existed && !def_acl) {
2242
2243                 int saved_errno = errno; /* We might get ENOSYS in the next
2244                                           * call.. */
2245
2246                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2247                     errno == ENOSYS) {
2248                         errno = saved_errno; /* Ignore ENOSYS */
2249                 }
2250
2251         } else if (new_unx_mode) {
2252
2253                 int ret = -1;
2254
2255                 /* Attributes need changing. File already existed. */
2256
2257                 {
2258                         int saved_errno = errno; /* We might get ENOSYS in the
2259                                                   * next call.. */
2260                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2261
2262                         if (ret == -1 && errno == ENOSYS) {
2263                                 errno = saved_errno; /* Ignore ENOSYS */
2264                         } else {
2265                                 DEBUG(5, ("open_file_ntcreate: reset "
2266                                           "attributes of file %s to 0%o\n",
2267                                           smb_fname_str_dbg(smb_fname),
2268                                           (unsigned int)new_unx_mode));
2269                                 ret = 0; /* Don't do the fchmod below. */
2270                         }
2271                 }
2272
2273                 if ((ret == -1) &&
2274                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2275                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2276                                   "attributes of file %s to 0%o\n",
2277                                   smb_fname_str_dbg(smb_fname),
2278                                   (unsigned int)new_unx_mode));
2279         }
2280
2281         /* If this is a successful open, we must remove any deferred open
2282          * records. */
2283         if (req != NULL) {
2284                 del_deferred_open_entry(lck, req->mid,
2285                                         sconn_server_id(req->sconn));
2286         }
2287         TALLOC_FREE(lck);
2288
2289         return NT_STATUS_OK;
2290 }
2291
2292
2293 /****************************************************************************
2294  Open a file for for write to ensure that we can fchmod it.
2295 ****************************************************************************/
2296
2297 NTSTATUS open_file_fchmod(connection_struct *conn,
2298                           struct smb_filename *smb_fname,
2299                           files_struct **result)
2300 {
2301         if (!VALID_STAT(smb_fname->st)) {
2302                 return NT_STATUS_INVALID_PARAMETER;
2303         }
2304
2305         return SMB_VFS_CREATE_FILE(
2306                 conn,                                   /* conn */
2307                 NULL,                                   /* req */
2308                 0,                                      /* root_dir_fid */
2309                 smb_fname,                              /* fname */
2310                 FILE_WRITE_DATA,                        /* access_mask */
2311                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2312                     FILE_SHARE_DELETE),
2313                 FILE_OPEN,                              /* create_disposition*/
2314                 0,                                      /* create_options */
2315                 0,                                      /* file_attributes */
2316                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2317                 0,                                      /* allocation_size */
2318                 0,                                      /* private_flags */
2319                 NULL,                                   /* sd */
2320                 NULL,                                   /* ea_list */
2321                 result,                                 /* result */
2322                 NULL);                                  /* pinfo */
2323 }
2324
2325 static NTSTATUS mkdir_internal(connection_struct *conn,
2326                                struct smb_filename *smb_dname,
2327                                uint32 file_attributes)
2328 {
2329         mode_t mode;
2330         char *parent_dir;
2331         NTSTATUS status;
2332         bool posix_open = false;
2333
2334         if(!CAN_WRITE(conn)) {
2335                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2336                          "%s\n", lp_servicename(SNUM(conn))));
2337                 return NT_STATUS_ACCESS_DENIED;
2338         }
2339
2340         status = check_name(conn, smb_dname->base_name);
2341         if (!NT_STATUS_IS_OK(status)) {
2342                 return status;
2343         }
2344
2345         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2346                             NULL)) {
2347                 return NT_STATUS_NO_MEMORY;
2348         }
2349
2350         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2351                 posix_open = true;
2352                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2353         } else {
2354                 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2355         }
2356
2357         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2358                 return map_nt_error_from_unix(errno);
2359         }
2360
2361         /* Ensure we're checking for a symlink here.... */
2362         /* We don't want to get caught by a symlink racer. */
2363
2364         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2365                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2366                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2367                 return map_nt_error_from_unix(errno);
2368         }
2369
2370         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2371                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2372                           smb_fname_str_dbg(smb_dname)));
2373                 return NT_STATUS_ACCESS_DENIED;
2374         }
2375
2376         if (lp_store_dos_attributes(SNUM(conn))) {
2377                 if (!posix_open) {
2378                         file_set_dosmode(conn, smb_dname,
2379                                          file_attributes | aDIR,
2380                                          parent_dir, true);
2381                 }
2382         }
2383
2384         if (lp_inherit_perms(SNUM(conn))) {
2385                 inherit_access_posix_acl(conn, parent_dir,
2386                                          smb_dname->base_name, mode);
2387         }
2388
2389         if (!posix_open) {
2390                 /*
2391                  * Check if high bits should have been set,
2392                  * then (if bits are missing): add them.
2393                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2394                  * dir.
2395                  */
2396                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2397                     (mode & ~smb_dname->st.st_ex_mode)) {
2398                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2399                                       (smb_dname->st.st_ex_mode |
2400                                           (mode & ~smb_dname->st.st_ex_mode)));
2401                 }
2402         }
2403
2404         /* Change the owner if required. */
2405         if (lp_inherit_owner(SNUM(conn))) {
2406                 change_dir_owner_to_parent(conn, parent_dir,
2407                                            smb_dname->base_name,
2408                                            &smb_dname->st);
2409         }
2410
2411         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2412                      smb_dname->base_name);
2413
2414         return NT_STATUS_OK;
2415 }
2416
2417 /****************************************************************************
2418  Open a directory from an NT SMB call.
2419 ****************************************************************************/
2420
2421 static NTSTATUS open_directory(connection_struct *conn,
2422                                struct smb_request *req,
2423                                struct smb_filename *smb_dname,
2424                                uint32 access_mask,
2425                                uint32 share_access,
2426                                uint32 create_disposition,
2427                                uint32 create_options,
2428                                uint32 file_attributes,
2429                                int *pinfo,
2430                                files_struct **result)
2431 {
2432         files_struct *fsp = NULL;
2433         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2434         struct share_mode_lock *lck = NULL;
2435         NTSTATUS status;
2436         struct timespec mtimespec;
2437         int info = 0;
2438
2439         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2440
2441         /* Ensure we have a directory attribute. */
2442         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2443
2444         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2445                  "share_access = 0x%x create_options = 0x%x, "
2446                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2447                  smb_fname_str_dbg(smb_dname),
2448                  (unsigned int)access_mask,
2449                  (unsigned int)share_access,
2450                  (unsigned int)create_options,
2451                  (unsigned int)create_disposition,
2452                  (unsigned int)file_attributes));
2453
2454         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2455                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2456                         is_ntfs_stream_smb_fname(smb_dname)) {
2457                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2458                           smb_fname_str_dbg(smb_dname)));
2459                 return NT_STATUS_NOT_A_DIRECTORY;
2460         }
2461
2462         status = calculate_access_mask(conn, smb_dname, dir_existed,
2463                                        access_mask, &access_mask);
2464         if (!NT_STATUS_IS_OK(status)) {
2465                 DEBUG(10, ("open_directory: calculate_access_mask "
2466                         "on file %s returned %s\n",
2467                         smb_fname_str_dbg(smb_dname),
2468                         nt_errstr(status)));
2469                 return status;
2470         }
2471
2472         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2473                         !security_token_has_privilege(get_current_nttok(conn),
2474                                         SEC_PRIV_SECURITY)) {
2475                 DEBUG(10, ("open_directory: open on %s "
2476                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2477                         smb_fname_str_dbg(smb_dname)));
2478                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2479         }
2480
2481         switch( create_disposition ) {
2482                 case FILE_OPEN:
2483
2484                         info = FILE_WAS_OPENED;
2485
2486                         /*
2487                          * We want to follow symlinks here.
2488                          */
2489
2490                         if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2491                                 return map_nt_error_from_unix(errno);
2492                         }
2493
2494                         break;
2495
2496                 case FILE_CREATE:
2497
2498                         /* If directory exists error. If directory doesn't
2499                          * exist create. */
2500
2501                         status = mkdir_internal(conn, smb_dname,
2502                                                 file_attributes);
2503
2504                         if (!NT_STATUS_IS_OK(status)) {
2505                                 DEBUG(2, ("open_directory: unable to create "
2506                                           "%s. Error was %s\n",
2507                                           smb_fname_str_dbg(smb_dname),
2508                                           nt_errstr(status)));
2509                                 return status;
2510                         }
2511
2512                         info = FILE_WAS_CREATED;
2513                         break;
2514
2515                 case FILE_OPEN_IF:
2516                         /*
2517                          * If directory exists open. If directory doesn't
2518                          * exist create.
2519                          */
2520
2521                         status = mkdir_internal(conn, smb_dname,
2522                                                 file_attributes);
2523
2524                         if (NT_STATUS_IS_OK(status)) {
2525                                 info = FILE_WAS_CREATED;
2526                         }
2527
2528                         if (NT_STATUS_EQUAL(status,
2529                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2530                                 info = FILE_WAS_OPENED;
2531                                 status = NT_STATUS_OK;
2532                         }
2533
2534                         break;
2535
2536                 case FILE_SUPERSEDE:
2537                 case FILE_OVERWRITE:
2538                 case FILE_OVERWRITE_IF:
2539                 default:
2540                         DEBUG(5,("open_directory: invalid create_disposition "
2541                                  "0x%x for directory %s\n",
2542                                  (unsigned int)create_disposition,
2543                                  smb_fname_str_dbg(smb_dname)));
2544                         return NT_STATUS_INVALID_PARAMETER;
2545         }
2546
2547         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2548                 DEBUG(5,("open_directory: %s is not a directory !\n",
2549                          smb_fname_str_dbg(smb_dname)));
2550                 return NT_STATUS_NOT_A_DIRECTORY;
2551         }
2552
2553         if (info == FILE_WAS_OPENED) {
2554                 uint32_t access_granted = 0;
2555                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2556                                                 &access_granted);
2557
2558                 /* Were we trying to do a directory open
2559                  * for delete and didn't get DELETE
2560                  * access (only) ? Check if the
2561                  * directory allows DELETE_CHILD.
2562                  * See here:
2563                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2564                  * for details. */
2565
2566                 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2567                         (access_mask & DELETE_ACCESS) &&
2568                         (access_granted == DELETE_ACCESS) &&
2569                         can_delete_file_in_directory(conn, smb_dname))) {
2570                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2571                                 "on directory %s\n",
2572                                 smb_fname_str_dbg(smb_dname)));
2573                         status = NT_STATUS_OK;
2574                 }
2575
2576                 if (!NT_STATUS_IS_OK(status)) {
2577                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2578                                 "file %s failed with %s\n",
2579                                 smb_fname_str_dbg(smb_dname),
2580                                 nt_errstr(status)));
2581                         return status;
2582                 }
2583         }
2584
2585         status = file_new(req, conn, &fsp);
2586         if(!NT_STATUS_IS_OK(status)) {
2587                 return status;
2588         }
2589
2590         /*
2591          * Setup the files_struct for it.
2592          */
2593
2594         fsp->mode = smb_dname->st.st_ex_mode;
2595         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2596         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2597         fsp->file_pid = req ? req->smbpid : 0;
2598         fsp->can_lock = False;
2599         fsp->can_read = False;
2600         fsp->can_write = False;
2601
2602         fsp->share_access = share_access;
2603         fsp->fh->private_options = 0;
2604         /*
2605          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2606          */
2607         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2608         fsp->print_file = NULL;
2609         fsp->modified = False;
2610         fsp->oplock_type = NO_OPLOCK;
2611         fsp->sent_oplock_break = NO_BREAK_SENT;
2612         fsp->is_directory = True;
2613         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2614         status = fsp_set_smb_fname(fsp, smb_dname);
2615         if (!NT_STATUS_IS_OK(status)) {
2616                 return status;
2617         }
2618
2619         mtimespec = smb_dname->st.st_ex_mtime;
2620
2621         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2622                                   conn->connectpath, smb_dname, &mtimespec);
2623
2624         if (lck == NULL) {
2625                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2626                           "%s\n", smb_fname_str_dbg(smb_dname)));
2627                 file_free(req, fsp);
2628                 return NT_STATUS_SHARING_VIOLATION;
2629         }
2630
2631         status = open_mode_check(conn, lck, fsp->name_hash,
2632                                 access_mask, share_access,
2633                                  create_options, &dir_existed);
2634
2635         if (!NT_STATUS_IS_OK(status)) {
2636                 TALLOC_FREE(lck);
2637                 file_free(req, fsp);
2638                 return status;
2639         }
2640
2641         set_share_mode(lck, fsp, get_current_uid(conn), 0, NO_OPLOCK);
2642
2643         /* For directories the delete on close bit at open time seems
2644            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2645         if (create_options & FILE_DELETE_ON_CLOSE) {
2646                 status = can_set_delete_on_close(fsp, 0);
2647                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2648                         TALLOC_FREE(lck);
2649                         file_free(req, fsp);
2650                         return status;
2651                 }
2652
2653                 if (NT_STATUS_IS_OK(status)) {
2654                         /* Note that here we set the *inital* delete on close flag,
2655                            not the regular one. The magic gets handled in close. */
2656                         fsp->initial_delete_on_close = True;
2657                 }
2658         }
2659
2660         TALLOC_FREE(lck);
2661
2662         if (pinfo) {
2663                 *pinfo = info;
2664         }
2665
2666         *result = fsp;
2667         return NT_STATUS_OK;
2668 }
2669
2670 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2671                           struct smb_filename *smb_dname)
2672 {
2673         NTSTATUS status;
2674         files_struct *fsp;
2675
2676         status = SMB_VFS_CREATE_FILE(
2677                 conn,                                   /* conn */
2678                 req,                                    /* req */
2679                 0,                                      /* root_dir_fid */
2680                 smb_dname,                              /* fname */
2681                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2682                 FILE_SHARE_NONE,                        /* share_access */
2683                 FILE_CREATE,                            /* create_disposition*/
2684                 FILE_DIRECTORY_FILE,                    /* create_options */
2685                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2686                 0,                                      /* oplock_request */
2687                 0,                                      /* allocation_size */
2688                 0,                                      /* private_flags */
2689                 NULL,                                   /* sd */
2690                 NULL,                                   /* ea_list */
2691                 &fsp,                                   /* result */
2692                 NULL);                                  /* pinfo */
2693
2694         if (NT_STATUS_IS_OK(status)) {
2695                 close_file(req, fsp, NORMAL_CLOSE);
2696         }
2697
2698         return status;
2699 }
2700
2701 /****************************************************************************
2702  Receive notification that one of our open files has been renamed by another
2703  smbd process.
2704 ****************************************************************************/
2705
2706 void msg_file_was_renamed(struct messaging_context *msg,
2707                           void *private_data,
2708                           uint32_t msg_type,
2709                           struct server_id server_id,
2710                           DATA_BLOB *data)
2711 {
2712         struct smbd_server_connection *sconn;
2713         files_struct *fsp;
2714         char *frm = (char *)data->data;
2715         struct file_id id;
2716         const char *sharepath;
2717         const char *base_name;
2718         const char *stream_name;
2719         struct smb_filename *smb_fname = NULL;
2720         size_t sp_len, bn_len;
2721         NTSTATUS status;
2722
2723         sconn = msg_ctx_to_sconn(msg);
2724         if (sconn == NULL) {
2725                 DEBUG(1, ("could not find sconn\n"));
2726                 return;
2727         }
2728
2729         if (data->data == NULL
2730             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2731                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2732                           (int)data->length));
2733                 return;
2734         }
2735
2736         /* Unpack the message. */
2737         pull_file_id_24(frm, &id);
2738         sharepath = &frm[24];
2739         sp_len = strlen(sharepath);
2740         base_name = sharepath + sp_len + 1;
2741         bn_len = strlen(base_name);
2742         stream_name = sharepath + sp_len + 1 + bn_len + 1;
2743
2744         /* stream_name must always be NULL if there is no stream. */
2745         if (stream_name[0] == '\0') {
2746                 stream_name = NULL;
2747         }
2748
2749         status = create_synthetic_smb_fname(talloc_tos(), base_name,
2750                                             stream_name, NULL, &smb_fname);
2751         if (!NT_STATUS_IS_OK(status)) {
2752                 return;
2753         }
2754
2755         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2756                 "file_id %s\n",
2757                 sharepath, smb_fname_str_dbg(smb_fname),
2758                 file_id_string_tos(&id)));
2759
2760         for(fsp = file_find_di_first(sconn, id); fsp;
2761             fsp = file_find_di_next(fsp)) {
2762                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2763
2764                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2765                                 fsp->fnum, fsp_str_dbg(fsp),
2766                                 smb_fname_str_dbg(smb_fname)));
2767                         status = fsp_set_smb_fname(fsp, smb_fname);
2768                         if (!NT_STATUS_IS_OK(status)) {
2769                                 goto out;
2770                         }
2771                 } else {
2772                         /* TODO. JRA. */
2773                         /* Now we have the complete path we can work out if this is
2774                            actually within this share and adjust newname accordingly. */
2775                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2776                                 "not sharepath %s) "
2777                                 "fnum %d from %s -> %s\n",
2778                                 fsp->conn->connectpath,
2779                                 sharepath,
2780                                 fsp->fnum,
2781                                 fsp_str_dbg(fsp),
2782                                 smb_fname_str_dbg(smb_fname)));
2783                 }
2784         }
2785  out:
2786         TALLOC_FREE(smb_fname);
2787         return;
2788 }
2789
2790 /*
2791  * If a main file is opened for delete, all streams need to be checked for
2792  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2793  * If that works, delete them all by setting the delete on close and close.
2794  */
2795
2796 NTSTATUS open_streams_for_delete(connection_struct *conn,
2797                                         const char *fname)
2798 {
2799         struct stream_struct *stream_info;
2800         files_struct **streams;
2801         int i;
2802         unsigned int num_streams;
2803         TALLOC_CTX *frame = talloc_stackframe();
2804         NTSTATUS status;
2805
2806         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2807                                     &num_streams, &stream_info);
2808
2809         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2810             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2811                 DEBUG(10, ("no streams around\n"));
2812                 TALLOC_FREE(frame);
2813                 return NT_STATUS_OK;
2814         }
2815
2816         if (!NT_STATUS_IS_OK(status)) {
2817                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2818                            nt_errstr(status)));
2819                 goto fail;
2820         }
2821
2822         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2823                    num_streams));
2824
2825         if (num_streams == 0) {
2826                 TALLOC_FREE(frame);
2827                 return NT_STATUS_OK;
2828         }
2829
2830         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2831         if (streams == NULL) {
2832                 DEBUG(0, ("talloc failed\n"));
2833                 status = NT_STATUS_NO_MEMORY;
2834                 goto fail;
2835         }
2836
2837         for (i=0; i<num_streams; i++) {
2838                 struct smb_filename *smb_fname = NULL;
2839
2840                 if (strequal(stream_info[i].name, "::$DATA")) {
2841                         streams[i] = NULL;
2842                         continue;
2843                 }
2844
2845                 status = create_synthetic_smb_fname(talloc_tos(), fname,
2846                                                     stream_info[i].name,
2847                                                     NULL, &smb_fname);
2848                 if (!NT_STATUS_IS_OK(status)) {
2849                         goto fail;
2850                 }
2851
2852                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2853                         DEBUG(10, ("Unable to stat stream: %s\n",
2854                                    smb_fname_str_dbg(smb_fname)));
2855                 }
2856
2857                 status = SMB_VFS_CREATE_FILE(
2858                          conn,                  /* conn */
2859                          NULL,                  /* req */
2860                          0,                     /* root_dir_fid */
2861                          smb_fname,             /* fname */
2862                          DELETE_ACCESS,         /* access_mask */
2863                          (FILE_SHARE_READ |     /* share_access */
2864                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2865                          FILE_OPEN,             /* create_disposition*/
2866                          0,                     /* create_options */
2867                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2868                          0,                     /* oplock_request */
2869                          0,                     /* allocation_size */
2870                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
2871                          NULL,                  /* sd */
2872                          NULL,                  /* ea_list */
2873                          &streams[i],           /* result */
2874                          NULL);                 /* pinfo */
2875
2876                 if (!NT_STATUS_IS_OK(status)) {
2877                         DEBUG(10, ("Could not open stream %s: %s\n",
2878                                    smb_fname_str_dbg(smb_fname),
2879                                    nt_errstr(status)));
2880
2881                         TALLOC_FREE(smb_fname);
2882                         break;
2883                 }
2884                 TALLOC_FREE(smb_fname);
2885         }
2886
2887         /*
2888          * don't touch the variable "status" beyond this point :-)
2889          */
2890
2891         for (i -= 1 ; i >= 0; i--) {
2892                 if (streams[i] == NULL) {
2893                         continue;
2894                 }
2895
2896                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2897                            fsp_str_dbg(streams[i])));
2898                 close_file(NULL, streams[i], NORMAL_CLOSE);
2899         }
2900
2901  fail:
2902         TALLOC_FREE(frame);
2903         return status;
2904 }
2905
2906 /*
2907  * Wrapper around open_file_ntcreate and open_directory
2908  */
2909
2910 static NTSTATUS create_file_unixpath(connection_struct *conn,
2911                                      struct smb_request *req,
2912                                      struct smb_filename *smb_fname,
2913                                      uint32_t access_mask,
2914                                      uint32_t share_access,
2915                                      uint32_t create_disposition,
2916                                      uint32_t create_options,
2917                                      uint32_t file_attributes,
2918                                      uint32_t oplock_request,
2919                                      uint64_t allocation_size,
2920                                      uint32_t private_flags,
2921                                      struct security_descriptor *sd,
2922                                      struct ea_list *ea_list,
2923
2924                                      files_struct **result,
2925                                      int *pinfo)
2926 {
2927         int info = FILE_WAS_OPENED;
2928         files_struct *base_fsp = NULL;
2929         files_struct *fsp = NULL;
2930         NTSTATUS status;
2931
2932         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2933                   "file_attributes = 0x%x, share_access = 0x%x, "
2934                   "create_disposition = 0x%x create_options = 0x%x "
2935                   "oplock_request = 0x%x private_flags = 0x%x "
2936                   "ea_list = 0x%p, sd = 0x%p, "
2937                   "fname = %s\n",
2938                   (unsigned int)access_mask,
2939                   (unsigned int)file_attributes,
2940                   (unsigned int)share_access,
2941                   (unsigned int)create_disposition,
2942                   (unsigned int)create_options,
2943                   (unsigned int)oplock_request,
2944                   (unsigned int)private_flags,
2945                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
2946
2947         if (create_options & FILE_OPEN_BY_FILE_ID) {
2948                 status = NT_STATUS_NOT_SUPPORTED;
2949                 goto fail;
2950         }
2951
2952         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2953                 status = NT_STATUS_INVALID_PARAMETER;
2954                 goto fail;
2955         }
2956
2957         if (req == NULL) {
2958                 oplock_request |= INTERNAL_OPEN_ONLY;
2959         }
2960
2961         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2962             && (access_mask & DELETE_ACCESS)
2963             && !is_ntfs_stream_smb_fname(smb_fname)) {
2964                 /*
2965                  * We can't open a file with DELETE access if any of the
2966                  * streams is open without FILE_SHARE_DELETE
2967                  */
2968                 status = open_streams_for_delete(conn, smb_fname->base_name);
2969
2970                 if (!NT_STATUS_IS_OK(status)) {
2971                         goto fail;
2972                 }
2973         }
2974
2975         /* This is the correct thing to do (check every time) but can_delete
2976          * is expensive (it may have to read the parent directory
2977          * permissions). So for now we're not doing it unless we have a strong
2978          * hint the client is really going to delete this file. If the client
2979          * is forcing FILE_CREATE let the filesystem take care of the
2980          * permissions. */
2981
2982         /* Setting FILE_SHARE_DELETE is the hint. */
2983
2984         if (lp_acl_check_permissions(SNUM(conn))
2985             && (create_disposition != FILE_CREATE)
2986             && (share_access & FILE_SHARE_DELETE)
2987             && (access_mask & DELETE_ACCESS)
2988             && (!(can_delete_file_in_directory(conn, smb_fname) ||
2989                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
2990                 status = NT_STATUS_ACCESS_DENIED;
2991                 DEBUG(10,("create_file_unixpath: open file %s "
2992                           "for delete ACCESS_DENIED\n",
2993                           smb_fname_str_dbg(smb_fname)));
2994                 goto fail;
2995         }
2996
2997         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2998                         !security_token_has_privilege(get_current_nttok(conn),
2999                                         SEC_PRIV_SECURITY)) {
3000                 DEBUG(10, ("create_file_unixpath: open on %s "
3001                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3002                         smb_fname_str_dbg(smb_fname)));
3003                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3004                 goto fail;
3005         }
3006
3007         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3008             && is_ntfs_stream_smb_fname(smb_fname)
3009             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3010                 uint32 base_create_disposition;
3011                 struct smb_filename *smb_fname_base = NULL;
3012
3013                 if (create_options & FILE_DIRECTORY_FILE) {
3014                         status = NT_STATUS_NOT_A_DIRECTORY;
3015                         goto fail;
3016                 }
3017
3018                 switch (create_disposition) {
3019                 case FILE_OPEN:
3020                         base_create_disposition = FILE_OPEN;
3021                         break;
3022                 default:
3023                         base_create_disposition = FILE_OPEN_IF;
3024                         break;
3025                 }
3026
3027                 /* Create an smb_filename with stream_name == NULL. */
3028                 status = create_synthetic_smb_fname(talloc_tos(),
3029                                                     smb_fname->base_name,
3030                                                     NULL, NULL,
3031                                                     &smb_fname_base);
3032                 if (!NT_STATUS_IS_OK(status)) {
3033                         goto fail;
3034                 }
3035
3036                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3037                         DEBUG(10, ("Unable to stat stream: %s\n",
3038                                    smb_fname_str_dbg(smb_fname_base)));
3039                 }
3040
3041                 /* Open the base file. */
3042                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3043                                               FILE_SHARE_READ
3044                                               | FILE_SHARE_WRITE
3045                                               | FILE_SHARE_DELETE,
3046                                               base_create_disposition,
3047                                               0, 0, 0, 0, 0, NULL, NULL,
3048                                               &base_fsp, NULL);
3049                 TALLOC_FREE(smb_fname_base);
3050
3051                 if (!NT_STATUS_IS_OK(status)) {
3052                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3053                                    "%s\n", smb_fname->base_name,
3054                                    nt_errstr(status)));
3055                         goto fail;
3056                 }
3057                 /* we don't need to low level fd */
3058                 fd_close(base_fsp);
3059         }
3060
3061         /*
3062          * If it's a request for a directory open, deal with it separately.
3063          */
3064
3065         if (create_options & FILE_DIRECTORY_FILE) {
3066
3067                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3068                         status = NT_STATUS_INVALID_PARAMETER;
3069                         goto fail;
3070                 }
3071
3072                 /* Can't open a temp directory. IFS kit test. */
3073                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3074                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3075                         status = NT_STATUS_INVALID_PARAMETER;
3076                         goto fail;
3077                 }
3078
3079                 /*
3080                  * We will get a create directory here if the Win32
3081                  * app specified a security descriptor in the
3082                  * CreateDirectory() call.
3083                  */
3084
3085                 oplock_request = 0;
3086                 status = open_directory(
3087                         conn, req, smb_fname, access_mask, share_access,
3088                         create_disposition, create_options, file_attributes,
3089                         &info, &fsp);
3090         } else {
3091
3092                 /*
3093                  * Ordinary file case.
3094                  */
3095
3096                 status = file_new(req, conn, &fsp);
3097                 if(!NT_STATUS_IS_OK(status)) {
3098                         goto fail;
3099                 }
3100
3101                 status = fsp_set_smb_fname(fsp, smb_fname);
3102                 if (!NT_STATUS_IS_OK(status)) {
3103                         goto fail;
3104                 }
3105
3106                 /*
3107                  * We're opening the stream element of a base_fsp
3108                  * we already opened. Set up the base_fsp pointer.
3109                  */
3110                 if (base_fsp) {
3111                         fsp->base_fsp = base_fsp;
3112                 }
3113
3114                 status = open_file_ntcreate(conn,
3115                                             req,
3116                                             access_mask,
3117                                             share_access,
3118                                             create_disposition,
3119                                             create_options,
3120                                             file_attributes,
3121                                             oplock_request,
3122                                             private_flags,
3123                                             &info,
3124                                             fsp);
3125
3126                 if(!NT_STATUS_IS_OK(status)) {
3127                         file_free(req, fsp);
3128                         fsp = NULL;
3129                 }
3130
3131                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3132
3133                         /* A stream open never opens a directory */
3134
3135                         if (base_fsp) {
3136                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3137                                 goto fail;
3138                         }
3139
3140                         /*
3141                          * Fail the open if it was explicitly a non-directory
3142                          * file.
3143                          */
3144
3145                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3146                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3147                                 goto fail;
3148                         }
3149
3150                         oplock_request = 0;
3151                         status = open_directory(
3152                                 conn, req, smb_fname, access_mask,
3153                                 share_access, create_disposition,
3154                                 create_options, file_attributes,
3155                                 &info, &fsp);
3156                 }
3157         }
3158
3159         if (!NT_STATUS_IS_OK(status)) {
3160                 goto fail;
3161         }
3162
3163         fsp->base_fsp = base_fsp;
3164
3165         /*
3166          * According to the MS documentation, the only time the security
3167          * descriptor is applied to the opened file is iff we *created* the
3168          * file; an existing file stays the same.
3169          *
3170          * Also, it seems (from observation) that you can open the file with
3171          * any access mask but you can still write the sd. We need to override
3172          * the granted access before we call set_sd
3173          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3174          */
3175
3176         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3177             && lp_nt_acl_support(SNUM(conn))) {
3178
3179                 uint32_t sec_info_sent;
3180                 uint32_t saved_access_mask = fsp->access_mask;
3181
3182                 sec_info_sent = get_sec_info(sd);
3183
3184                 fsp->access_mask = FILE_GENERIC_ALL;
3185
3186                 /* Convert all the generic bits. */
3187                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3188                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3189
3190                 if (sec_info_sent & (SECINFO_OWNER|
3191                                         SECINFO_GROUP|
3192                                         SECINFO_DACL|
3193                                         SECINFO_SACL)) {
3194                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3195                 }
3196
3197                 fsp->access_mask = saved_access_mask;
3198
3199                 if (!NT_STATUS_IS_OK(status)) {
3200                         goto fail;
3201                 }
3202         }
3203
3204         if ((ea_list != NULL) &&
3205             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3206                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3207                 if (!NT_STATUS_IS_OK(status)) {
3208                         goto fail;
3209                 }
3210         }
3211
3212         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3213                 status = NT_STATUS_ACCESS_DENIED;
3214                 goto fail;
3215         }
3216
3217         /* Save the requested allocation size. */
3218         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3219                 if (allocation_size
3220                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3221                         fsp->initial_allocation_size = smb_roundup(
3222                                 fsp->conn, allocation_size);
3223                         if (fsp->is_directory) {
3224                                 /* Can't set allocation size on a directory. */
3225                                 status = NT_STATUS_ACCESS_DENIED;
3226                                 goto fail;
3227                         }
3228                         if (vfs_allocate_file_space(
3229                                     fsp, fsp->initial_allocation_size) == -1) {
3230                                 status = NT_STATUS_DISK_FULL;
3231                                 goto fail;
3232                         }
3233                 } else {
3234                         fsp->initial_allocation_size = smb_roundup(
3235                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3236                 }
3237         }
3238
3239         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3240
3241         *result = fsp;
3242         if (pinfo != NULL) {
3243                 *pinfo = info;
3244         }
3245
3246         smb_fname->st = fsp->fsp_name->st;
3247
3248         return NT_STATUS_OK;
3249
3250  fail:
3251         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3252
3253         if (fsp != NULL) {
3254                 if (base_fsp && fsp->base_fsp == base_fsp) {
3255                         /*
3256                          * The close_file below will close
3257                          * fsp->base_fsp.
3258                          */
3259                         base_fsp = NULL;
3260                 }
3261                 close_file(req, fsp, ERROR_CLOSE);
3262                 fsp = NULL;
3263         }
3264         if (base_fsp != NULL) {
3265                 close_file(req, base_fsp, ERROR_CLOSE);
3266                 base_fsp = NULL;
3267         }
3268         return status;
3269 }
3270
3271 /*
3272  * Calculate the full path name given a relative fid.
3273  */
3274 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3275                                    struct smb_request *req,
3276                                    uint16_t root_dir_fid,
3277                                    struct smb_filename *smb_fname)
3278 {
3279         files_struct *dir_fsp;
3280         char *parent_fname = NULL;
3281         char *new_base_name = NULL;
3282         NTSTATUS status;
3283
3284         if (root_dir_fid == 0 || !smb_fname) {
3285                 status = NT_STATUS_INTERNAL_ERROR;
3286                 goto out;
3287         }
3288
3289         dir_fsp = file_fsp(req, root_dir_fid);
3290
3291         if (dir_fsp == NULL) {
3292                 status = NT_STATUS_INVALID_HANDLE;
3293                 goto out;
3294         }
3295
3296         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3297                 status = NT_STATUS_INVALID_HANDLE;
3298                 goto out;
3299         }
3300
3301         if (!dir_fsp->is_directory) {
3302
3303                 /*
3304                  * Check to see if this is a mac fork of some kind.
3305                  */
3306
3307                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3308                     is_ntfs_stream_smb_fname(smb_fname)) {
3309                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3310                         goto out;
3311                 }
3312
3313                 /*
3314                   we need to handle the case when we get a
3315                   relative open relative to a file and the
3316                   pathname is blank - this is a reopen!
3317                   (hint from demyn plantenberg)
3318                 */
3319
3320                 status = NT_STATUS_INVALID_HANDLE;
3321                 goto out;
3322         }
3323
3324         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3325                 /*
3326                  * We're at the toplevel dir, the final file name
3327                  * must not contain ./, as this is filtered out
3328                  * normally by srvstr_get_path and unix_convert
3329                  * explicitly rejects paths containing ./.
3330                  */
3331                 parent_fname = talloc_strdup(talloc_tos(), "");
3332                 if (parent_fname == NULL) {
3333                         status = NT_STATUS_NO_MEMORY;
3334                         goto out;
3335                 }
3336         } else {
3337                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3338
3339                 /*
3340                  * Copy in the base directory name.
3341                  */
3342
3343                 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3344                     dir_name_len+2);
3345                 if (parent_fname == NULL) {
3346                         status = NT_STATUS_NO_MEMORY;
3347                         goto out;
3348                 }
3349                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3350                     dir_name_len+1);
3351
3352                 /*
3353                  * Ensure it ends in a '/'.
3354                  * We used TALLOC_SIZE +2 to add space for the '/'.
3355                  */
3356
3357                 if(dir_name_len
3358                     && (parent_fname[dir_name_len-1] != '\\')
3359                     && (parent_fname[dir_name_len-1] != '/')) {
3360                         parent_fname[dir_name_len] = '/';
3361                         parent_fname[dir_name_len+1] = '\0';
3362                 }
3363         }
3364
3365         new_base_name = talloc_asprintf(smb_fname, "%s%s", parent_fname,
3366                                         smb_fname->base_name);
3367         if (new_base_name == NULL) {
3368                 status = NT_STATUS_NO_MEMORY;
3369                 goto out;
3370         }
3371
3372         TALLOC_FREE(smb_fname->base_name);
3373         smb_fname->base_name = new_base_name;
3374         status = NT_STATUS_OK;
3375
3376  out:
3377         TALLOC_FREE(parent_fname);
3378         return status;
3379 }
3380
3381 NTSTATUS create_file_default(connection_struct *conn,
3382                              struct smb_request *req,
3383                              uint16_t root_dir_fid,
3384                              struct smb_filename *smb_fname,
3385                              uint32_t access_mask,
3386                              uint32_t share_access,
3387                              uint32_t create_disposition,
3388                              uint32_t create_options,
3389                              uint32_t file_attributes,
3390                              uint32_t oplock_request,
3391                              uint64_t allocation_size,
3392                              uint32_t private_flags,
3393                              struct security_descriptor *sd,
3394                              struct ea_list *ea_list,
3395                              files_struct **result,
3396                              int *pinfo)
3397 {
3398         int info = FILE_WAS_OPENED;
3399         files_struct *fsp = NULL;
3400         NTSTATUS status;
3401         bool stream_name = false;
3402
3403         DEBUG(10,("create_file: access_mask = 0x%x "
3404                   "file_attributes = 0x%x, share_access = 0x%x, "
3405                   "create_disposition = 0x%x create_options = 0x%x "
3406                   "oplock_request = 0x%x "
3407                   "private_flags = 0x%x "
3408                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3409                   "fname = %s\n",
3410                   (unsigned int)access_mask,
3411                   (unsigned int)file_attributes,
3412                   (unsigned int)share_access,
3413                   (unsigned int)create_disposition,
3414                   (unsigned int)create_options,
3415                   (unsigned int)oplock_request,
3416                   (unsigned int)private_flags,
3417                   (unsigned int)root_dir_fid,
3418                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3419
3420         /*
3421          * Calculate the filename from the root_dir_if if necessary.
3422          */
3423
3424         if (root_dir_fid != 0) {
3425                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3426                                                    smb_fname);
3427                 if (!NT_STATUS_IS_OK(status)) {
3428                         goto fail;
3429                 }
3430         }
3431
3432         /*
3433          * Check to see if this is a mac fork of some kind.
3434          */
3435
3436         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3437         if (stream_name) {
3438                 enum FAKE_FILE_TYPE fake_file_type;
3439
3440                 fake_file_type = is_fake_file(smb_fname);
3441
3442                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3443
3444                         /*
3445                          * Here we go! support for changing the disk quotas
3446                          * --metze
3447                          *
3448                          * We need to fake up to open this MAGIC QUOTA file
3449                          * and return a valid FID.
3450                          *
3451                          * w2k close this file directly after openening xp
3452                          * also tries a QUERY_FILE_INFO on the file and then
3453                          * close it
3454                          */
3455                         status = open_fake_file(req, conn, req->vuid,
3456                                                 fake_file_type, smb_fname,
3457                                                 access_mask, &fsp);
3458                         if (!NT_STATUS_IS_OK(status)) {
3459                                 goto fail;
3460                         }
3461
3462                         ZERO_STRUCT(smb_fname->st);
3463                         goto done;
3464                 }
3465
3466                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3467                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3468                         goto fail;
3469                 }
3470         }
3471
3472         /* All file access must go through check_name() */
3473
3474         status = check_name(conn, smb_fname->base_name);
3475         if (!NT_STATUS_IS_OK(status)) {
3476                 goto fail;
3477         }
3478
3479         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3480                 int ret;
3481                 smb_fname->stream_name = NULL;
3482                 /* We have to handle this error here. */
3483                 if (create_options & FILE_DIRECTORY_FILE) {
3484                         status = NT_STATUS_NOT_A_DIRECTORY;
3485                         goto fail;
3486                 }
3487                 if (lp_posix_pathnames()) {
3488                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3489                 } else {
3490                         ret = SMB_VFS_STAT(conn, smb_fname);
3491                 }
3492
3493                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3494                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3495                         goto fail;
3496                 }
3497         }
3498
3499         status = create_file_unixpath(
3500                 conn, req, smb_fname, access_mask, share_access,
3501                 create_disposition, create_options, file_attributes,
3502                 oplock_request, allocation_size, private_flags,
3503                 sd, ea_list,
3504                 &fsp, &info);
3505
3506         if (!NT_STATUS_IS_OK(status)) {
3507                 goto fail;
3508         }
3509
3510  done:
3511         DEBUG(10, ("create_file: info=%d\n", info));
3512
3513         *result = fsp;
3514         if (pinfo != NULL) {
3515                 *pinfo = info;
3516         }
3517         return NT_STATUS_OK;
3518
3519  fail:
3520         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3521
3522         if (fsp != NULL) {
3523                 close_file(req, fsp, ERROR_CLOSE);
3524                 fsp = NULL;
3525         }
3526         return status;
3527 }