source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "auth.h"
  32 #include "messages.h"
  33
  34 extern const struct generic_mapping file_generic_mapping;
  35
  36 struct deferred_open_record {
  37         bool delayed_for_oplocks;
  38         struct file_id id;
  39 };
  40
  41 /****************************************************************************
  42  If the requester wanted DELETE_ACCESS and was rejected because
  43  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  44  ovverrides this.
  45 ****************************************************************************/
  46
  47 static bool parent_override_delete(connection_struct *conn,
  48                                         const struct smb_filename *smb_fname,
  49                                         uint32_t access_mask,
  50                                         uint32_t rejected_mask)
  51 {
  52         if ((access_mask & DELETE_ACCESS) &&
  53                     (rejected_mask & DELETE_ACCESS) &&
  54                     can_delete_file_in_directory(conn, smb_fname)) {
  55                 return true;
  56         }
  57         return false;
  58 }
  59
  60 /****************************************************************************
  61  Check if we have open rights.
  62 ****************************************************************************/
  63
  64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  65                                 const struct smb_filename *smb_fname,
  66                                 uint32_t access_mask)
  67 {
  68         /* Check if we have rights to open. */
  69         NTSTATUS status;
  70         struct security_descriptor *sd = NULL;
  71         uint32_t rejected_share_access;
  72         uint32_t rejected_mask = access_mask;
  73
  74         rejected_share_access = access_mask & ~(conn->share_access);
  75
  76         if (rejected_share_access) {
  77                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  78                         "on %s (0x%x)\n",
  79                         (unsigned int)access_mask,
  80                         smb_fname_str_dbg(smb_fname),
  81                         (unsigned int)rejected_share_access ));
  82                 return NT_STATUS_ACCESS_DENIED;
  83         }
  84
  85         if (get_current_uid(conn) == (uid_t)0) {
  86                 /* I'm sorry sir, I didn't know you were root... */
  87                 DEBUG(10,("smbd_check_access_rights: root override "
  88                         "on %s. Granting 0x%x\n",
  89                         smb_fname_str_dbg(smb_fname),
  90                         (unsigned int)access_mask ));
  91                 return NT_STATUS_OK;
  92         }
  93
  94         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  95                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
  96                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  97                         smb_fname_str_dbg(smb_fname),
  98                         (unsigned int)access_mask ));
  99                 return NT_STATUS_OK;
 100         }
 101
 102         if (access_mask == DELETE_ACCESS &&
 103                         VALID_STAT(smb_fname->st) &&
 104                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 105                 /* We can always delete a symlink. */
 106                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 107                         "on DELETE_ACCESS on symlink %s.\n",
 108                         smb_fname_str_dbg(smb_fname) ));
 109                 return NT_STATUS_OK;
 110         }
 111
 112         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 113                         (SECINFO_OWNER |
 114                         SECINFO_GROUP |
 115                         SECINFO_DACL),&sd);
 116
 117         if (!NT_STATUS_IS_OK(status)) {
 118                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 119                         "on %s: %s\n",
 120                         smb_fname_str_dbg(smb_fname),
 121                         nt_errstr(status)));
 122
 123                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 124                         goto access_denied;
 125                 }
 126
 127                 return status;
 128         }
 129
 130         /*
 131          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 132          * owner WRITE_DAC and READ_CONTROL.
 133          */
 134         status = se_access_check(sd,
 135                                 get_current_nttok(conn),
 136                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 137                                 &rejected_mask);
 138
 139         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 140                 "0x%x returning 0x%x (%s)\n",
 141                 smb_fname_str_dbg(smb_fname),
 142                 (unsigned int)access_mask,
 143                 (unsigned int)rejected_mask,
 144                 nt_errstr(status) ));
 145
 146         if (!NT_STATUS_IS_OK(status)) {
 147                 if (DEBUGLEVEL >= 10) {
 148                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 149                                 smb_fname_str_dbg(smb_fname) ));
 150                         NDR_PRINT_DEBUG(security_descriptor, sd);
 151                 }
 152         }
 153
 154         TALLOC_FREE(sd);
 155
 156         if (NT_STATUS_IS_OK(status) ||
 157                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 158                 return status;
 159         }
 160
 161         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 162
 163   access_denied:
 164
 165         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 166                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 167                         (lp_map_readonly(SNUM(conn)) ||
 168                         lp_map_archive(SNUM(conn)) ||
 169                         lp_map_hidden(SNUM(conn)) ||
 170                         lp_map_system(SNUM(conn)))) {
 171                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 172
 173                 DEBUG(10,("smbd_check_access_rights: "
 174                         "overrode "
 175                         "FILE_WRITE_ATTRIBUTES "
 176                         "on file %s\n",
 177                         smb_fname_str_dbg(smb_fname)));
 178         }
 179
 180         if (parent_override_delete(conn,
 181                                 smb_fname,
 182                                 access_mask,
 183                                 rejected_mask)) {
 184                 /* Were we trying to do an open
 185                  * for delete and didn't get DELETE
 186                  * access (only) ? Check if the
 187                  * directory allows DELETE_CHILD.
 188                  * See here:
 189                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 190                  * for details. */
 191
 192                 rejected_mask &= ~DELETE_ACCESS;
 193
 194                 DEBUG(10,("smbd_check_access_rights: "
 195                         "overrode "
 196                         "DELETE_ACCESS on "
 197                         "file %s\n",
 198                         smb_fname_str_dbg(smb_fname)));
 199         }
 200
 201         if (rejected_mask != 0) {
 202                 return NT_STATUS_ACCESS_DENIED;
 203         } else {
 204                 return NT_STATUS_OK;
 205         }
 206 }
 207
 208 static NTSTATUS check_parent_access(struct connection_struct *conn,
 209                                 struct smb_filename *smb_fname,
 210                                 uint32_t access_mask,
 211                                 char **pp_parent_dir)
 212 {
 213         NTSTATUS status;
 214         char *parent_dir = NULL;
 215         struct security_descriptor *parent_sd = NULL;
 216         uint32_t access_granted = 0;
 217
 218         if (!parent_dirname(talloc_tos(),
 219                                 smb_fname->base_name,
 220                                 &parent_dir,
 221                                 NULL)) {
 222                 return NT_STATUS_NO_MEMORY;
 223         }
 224
 225         if (pp_parent_dir) {
 226                 *pp_parent_dir = parent_dir;
 227         }
 228
 229         if (get_current_uid(conn) == (uid_t)0) {
 230                 /* I'm sorry sir, I didn't know you were root... */
 231                 DEBUG(10,("check_parent_access: root override "
 232                         "on %s. Granting 0x%x\n",
 233                         smb_fname_str_dbg(smb_fname),
 234                         (unsigned int)access_mask ));
 235                 return NT_STATUS_OK;
 236         }
 237
 238         status = SMB_VFS_GET_NT_ACL(conn,
 239                                 parent_dir,
 240                                 SECINFO_DACL,
 241                                 &parent_sd);
 242
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 245                         "%s with error %s\n",
 246                         parent_dir,
 247                         nt_errstr(status)));
 248                 return status;
 249         }
 250
 251         /*
 252          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 253          * owner WRITE_DAC and READ_CONTROL.
 254          */
 255         status = se_access_check(parent_sd,
 256                                 get_current_nttok(conn),
 257                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 258                                 &access_granted);
 259         if(!NT_STATUS_IS_OK(status)) {
 260                 DEBUG(5,("check_parent_access: access check "
 261                         "on directory %s for "
 262                         "path %s for mask 0x%x returned (0x%x) %s\n",
 263                         parent_dir,
 264                         smb_fname->base_name,
 265                         access_mask,
 266                         access_granted,
 267                         nt_errstr(status) ));
 268                 return status;
 269         }
 270
 271         return NT_STATUS_OK;
 272 }
 273
 274 /****************************************************************************
 275  fd support routines - attempt to do a dos_open.
 276 ****************************************************************************/
 277
 278 static NTSTATUS fd_open(struct connection_struct *conn,
 279                     files_struct *fsp,
 280                     int flags,
 281                     mode_t mode)
 282 {
 283         struct smb_filename *smb_fname = fsp->fsp_name;
 284         NTSTATUS status = NT_STATUS_OK;
 285
 286 #ifdef O_NOFOLLOW
 287         /*
 288          * Never follow symlinks on a POSIX client. The
 289          * client should be doing this.
 290          */
 291
 292         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 293                 flags |= O_NOFOLLOW;
 294         }
 295 #endif
 296
 297         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 298         if (fsp->fh->fd == -1) {
 299                 status = map_nt_error_from_unix(errno);
 300                 if (errno == EMFILE) {
 301                         static time_t last_warned = 0L;
 302
 303                         if (time((time_t *) NULL) > last_warned) {
 304                                 DEBUG(0,("Too many open files, unable "
 305                                         "to open more!  smbd's max "
 306                                         "open files = %d\n",
 307                                         lp_max_open_files()));
 308                                 last_warned = time((time_t *) NULL);
 309                         }
 310                 }
 311
 312         }
 313
 314         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 315                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 316                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 317
 318         return status;
 319 }
 320
 321 /****************************************************************************
 322  Close the file associated with a fsp.
 323 ****************************************************************************/
 324
 325 NTSTATUS fd_close(files_struct *fsp)
 326 {
 327         int ret;
 328
 329         if (fsp->dptr) {
 330                 dptr_CloseDir(fsp);
 331         }
 332         if (fsp->fh->fd == -1) {
 333                 return NT_STATUS_OK; /* What we used to call a stat open. */
 334         }
 335         if (fsp->fh->ref_count > 1) {
 336                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 337         }
 338
 339         ret = SMB_VFS_CLOSE(fsp);
 340         fsp->fh->fd = -1;
 341         if (ret == -1) {
 342                 return map_nt_error_from_unix(errno);
 343         }
 344         return NT_STATUS_OK;
 345 }
 346
 347 /****************************************************************************
 348  Change the ownership of a file to that of the parent directory.
 349  Do this by fd if possible.
 350 ****************************************************************************/
 351
 352 void change_file_owner_to_parent(connection_struct *conn,
 353                                         const char *inherit_from_dir,
 354                                         files_struct *fsp)
 355 {
 356         struct smb_filename *smb_fname_parent = NULL;
 357         NTSTATUS status;
 358         int ret;
 359
 360         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 361                                             NULL, NULL, &smb_fname_parent);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 return;
 364         }
 365
 366         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 367         if (ret == -1) {
 368                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 369                          "directory %s. Error was %s\n",
 370                          smb_fname_str_dbg(smb_fname_parent),
 371                          strerror(errno)));
 372                 TALLOC_FREE(smb_fname_parent);
 373                 return;
 374         }
 375
 376         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 377                 /* Already this uid - no need to change. */
 378                 DEBUG(10,("change_file_owner_to_parent: file %s "
 379                         "is already owned by uid %d\n",
 380                         fsp_str_dbg(fsp),
 381                         (int)fsp->fsp_name->st.st_ex_uid ));
 382                 TALLOC_FREE(smb_fname_parent);
 383                 return;
 384         }
 385
 386         become_root();
 387         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 388         unbecome_root();
 389         if (ret == -1) {
 390                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 391                          "file %s to parent directory uid %u. Error "
 392                          "was %s\n", fsp_str_dbg(fsp),
 393                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 394                          strerror(errno) ));
 395         } else {
 396                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 397                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 398                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 399                 /* Ensure the uid entry is updated. */
 400                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 401         }
 402
 403         TALLOC_FREE(smb_fname_parent);
 404 }
 405
 406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 407                                        const char *inherit_from_dir,
 408                                        const char *fname,
 409                                        SMB_STRUCT_STAT *psbuf)
 410 {
 411         struct smb_filename *smb_fname_parent = NULL;
 412         struct smb_filename *smb_fname_cwd = NULL;
 413         char *saved_dir = NULL;
 414         TALLOC_CTX *ctx = talloc_tos();
 415         NTSTATUS status = NT_STATUS_OK;
 416         int ret;
 417
 418         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 419                                             &smb_fname_parent);
 420         if (!NT_STATUS_IS_OK(status)) {
 421                 return status;
 422         }
 423
 424         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 425         if (ret == -1) {
 426                 status = map_nt_error_from_unix(errno);
 427                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 428                          "directory %s. Error was %s\n",
 429                          smb_fname_str_dbg(smb_fname_parent),
 430                          strerror(errno)));
 431                 goto out;
 432         }
 433
 434         /* We've already done an lstat into psbuf, and we know it's a
 435            directory. If we can cd into the directory and the dev/ino
 436            are the same then we can safely chown without races as
 437            we're locking the directory in place by being in it.  This
 438            should work on any UNIX (thanks tridge :-). JRA.
 439         */
 440
 441         saved_dir = vfs_GetWd(ctx,conn);
 442         if (!saved_dir) {
 443                 status = map_nt_error_from_unix(errno);
 444                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 445                          "current working directory. Error was %s\n",
 446                          strerror(errno)));
 447                 goto out;
 448         }
 449
 450         /* Chdir into the new path. */
 451         if (vfs_ChDir(conn, fname) == -1) {
 452                 status = map_nt_error_from_unix(errno);
 453                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 454                          "current working directory to %s. Error "
 455                          "was %s\n", fname, strerror(errno) ));
 456                 goto chdir;
 457         }
 458
 459         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 460                                             &smb_fname_cwd);
 461         if (!NT_STATUS_IS_OK(status)) {
 462                 return status;
 463         }
 464
 465         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 466         if (ret == -1) {
 467                 status = map_nt_error_from_unix(errno);
 468                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 469                          "directory '.' (%s) Error was %s\n",
 470                          fname, strerror(errno)));
 471                 goto chdir;
 472         }
 473
 474         /* Ensure we're pointing at the same place. */
 475         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 476             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 477                 DEBUG(0,("change_dir_owner_to_parent: "
 478                          "device/inode on directory %s changed. "
 479                          "Refusing to chown !\n", fname ));
 480                 status = NT_STATUS_ACCESS_DENIED;
 481                 goto chdir;
 482         }
 483
 484         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 485                 /* Already this uid - no need to change. */
 486                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 487                         "is already owned by uid %d\n",
 488                         fname,
 489                         (int)smb_fname_cwd->st.st_ex_uid ));
 490                 status = NT_STATUS_OK;
 491                 goto chdir;
 492         }
 493
 494         become_root();
 495         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 496                             (gid_t)-1);
 497         unbecome_root();
 498         if (ret == -1) {
 499                 status = map_nt_error_from_unix(errno);
 500                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 501                           "directory %s to parent directory uid %u. "
 502                           "Error was %s\n", fname,
 503                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 504                           strerror(errno) ));
 505         } else {
 506                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 507                         "directory %s to parent directory uid %u.\n",
 508                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 509                 /* Ensure the uid entry is updated. */
 510                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 511         }
 512
 513  chdir:
 514         vfs_ChDir(conn,saved_dir);
 515  out:
 516         TALLOC_FREE(smb_fname_parent);
 517         TALLOC_FREE(smb_fname_cwd);
 518         return status;
 519 }
 520
 521 /****************************************************************************
 522  Open a file.
 523 ****************************************************************************/
 524
 525 static NTSTATUS open_file(files_struct *fsp,
 526                           connection_struct *conn,
 527                           struct smb_request *req,
 528                           const char *parent_dir,
 529                           int flags,
 530                           mode_t unx_mode,
 531                           uint32 access_mask, /* client requested access mask. */
 532                           uint32 open_access_mask) /* what we're actually using in the open. */
 533 {
 534         struct smb_filename *smb_fname = fsp->fsp_name;
 535         NTSTATUS status = NT_STATUS_OK;
 536         int accmode = (flags & O_ACCMODE);
 537         int local_flags = flags;
 538         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 539         bool file_created = false;
 540
 541         fsp->fh->fd = -1;
 542         errno = EPERM;
 543
 544         /* Check permissions */
 545
 546         /*
 547          * This code was changed after seeing a client open request
 548          * containing the open mode of (DENY_WRITE/read-only) with
 549          * the 'create if not exist' bit set. The previous code
 550          * would fail to open the file read only on a read-only share
 551          * as it was checking the flags parameter  directly against O_RDONLY,
 552          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 553          * JRA.
 554          */
 555
 556         if (!CAN_WRITE(conn)) {
 557                 /* It's a read-only share - fail if we wanted to write. */
 558                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 559                         DEBUG(3,("Permission denied opening %s\n",
 560                                  smb_fname_str_dbg(smb_fname)));
 561                         return NT_STATUS_ACCESS_DENIED;
 562                 } else if(flags & O_CREAT) {
 563                         /* We don't want to write - but we must make sure that
 564                            O_CREAT doesn't create the file if we have write
 565                            access into the directory.
 566                         */
 567                         flags &= ~(O_CREAT|O_EXCL);
 568                         local_flags &= ~(O_CREAT|O_EXCL);
 569                 }
 570         }
 571
 572         /*
 573          * This little piece of insanity is inspired by the
 574          * fact that an NT client can open a file for O_RDONLY,
 575          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 576          * If the client *can* write to the file, then it expects to
 577          * truncate the file, even though it is opening for readonly.
 578          * Quicken uses this stupid trick in backup file creation...
 579          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 580          * for helping track this one down. It didn't bite us in 2.0.x
 581          * as we always opened files read-write in that release. JRA.
 582          */
 583
 584         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 585                 DEBUG(10,("open_file: truncate requested on read-only open "
 586                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 587                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 588         }
 589
 590         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 591             (!file_existed && (local_flags & O_CREAT)) ||
 592             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 593                 const char *wild;
 594
 595                 /*
 596                  * We can't actually truncate here as the file may be locked.
 597                  * open_file_ntcreate will take care of the truncate later. JRA.
 598                  */
 599
 600                 local_flags &= ~O_TRUNC;
 601
 602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 603                 /*
 604                  * We would block on opening a FIFO with no one else on the
 605                  * other end. Do what we used to do and add O_NONBLOCK to the
 606                  * open flags. JRA.
 607                  */
 608
 609                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 610                         local_flags |= O_NONBLOCK;
 611                 }
 612 #endif
 613
 614                 /* Don't create files with Microsoft wildcard characters. */
 615                 if (fsp->base_fsp) {
 616                         /*
 617                          * wildcard characters are allowed in stream names
 618                          * only test the basefilename
 619                          */
 620                         wild = fsp->base_fsp->fsp_name->base_name;
 621                 } else {
 622                         wild = smb_fname->base_name;
 623                 }
 624                 if ((local_flags & O_CREAT) && !file_existed &&
 625                     ms_has_wild(wild))  {
 626                         return NT_STATUS_OBJECT_NAME_INVALID;
 627                 }
 628
 629                 /* Can we access this file ? */
 630                 if (!fsp->base_fsp) {
 631                         /* Only do this check on non-stream open. */
 632                         if (file_existed) {
 633                                 status = smbd_check_access_rights(conn,
 634                                                 smb_fname,
 635                                                 access_mask);
 636                         } else if (local_flags & O_CREAT){
 637                                 status = check_parent_access(conn,
 638                                                 smb_fname,
 639                                                 SEC_DIR_ADD_FILE,
 640                                                 NULL);
 641                         } else {
 642                                 /* File didn't exist and no O_CREAT. */
 643                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 644                         }
 645                         if (!NT_STATUS_IS_OK(status)) {
 646                                 DEBUG(10,("open_file: "
 647                                         "%s on file "
 648                                         "%s returned %s\n",
 649                                         file_existed ?
 650                                                 "smbd_check_access_rights" :
 651                                                 "check_parent_access",
 652                                         smb_fname_str_dbg(smb_fname),
 653                                         nt_errstr(status) ));
 654                                 return status;
 655                         }
 656                 }
 657
 658                 /* Actually do the open */
 659                 status = fd_open(conn, fsp, local_flags, unx_mode);
 660                 if (!NT_STATUS_IS_OK(status)) {
 661                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 662                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 663                                  nt_errstr(status),local_flags,flags));
 664                         return status;
 665                 }
 666
 667                 if ((local_flags & O_CREAT) && !file_existed) {
 668                         file_created = true;
 669                 }
 670
 671         } else {
 672                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 673                 if (!file_existed) {
 674                         /* File must exist for a stat open. */
 675                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 676                 }
 677
 678                 status = smbd_check_access_rights(conn,
 679                                 smb_fname,
 680                                 access_mask);
 681
 682                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 683                                 fsp->posix_open &&
 684                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 685                         /* This is a POSIX stat open for delete
 686                          * or rename on a symlink that points
 687                          * nowhere. Allow. */
 688                         DEBUG(10,("open_file: allowing POSIX "
 689                                   "open on bad symlink %s\n",
 690                                   smb_fname_str_dbg(smb_fname)));
 691                         status = NT_STATUS_OK;
 692                 }
 693
 694                 if (!NT_STATUS_IS_OK(status)) {
 695                         DEBUG(10,("open_file: "
 696                                 "smbd_check_access_rights on file "
 697                                 "%s returned %s\n",
 698                                 smb_fname_str_dbg(smb_fname),
 699                                 nt_errstr(status) ));
 700                         return status;
 701                 }
 702         }
 703
 704         if (!file_existed) {
 705                 int ret;
 706
 707                 if (fsp->fh->fd == -1) {
 708                         ret = SMB_VFS_STAT(conn, smb_fname);
 709                 } else {
 710                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 711                         /* If we have an fd, this stat should succeed. */
 712                         if (ret == -1) {
 713                                 DEBUG(0,("Error doing fstat on open file %s "
 714                                          "(%s)\n",
 715                                          smb_fname_str_dbg(smb_fname),
 716                                          strerror(errno) ));
 717                         }
 718                 }
 719
 720                 /* For a non-io open, this stat failing means file not found. JRA */
 721                 if (ret == -1) {
 722                         status = map_nt_error_from_unix(errno);
 723                         fd_close(fsp);
 724                         return status;
 725                 }
 726
 727                 if (file_created) {
 728                         bool need_re_stat = false;
 729                         /* Do all inheritance work after we've
 730                            done a successful stat call and filled
 731                            in the stat struct in fsp->fsp_name. */
 732
 733                         /* Inherit the ACL if required */
 734                         if (lp_inherit_perms(SNUM(conn))) {
 735                                 inherit_access_posix_acl(conn, parent_dir,
 736                                                          smb_fname->base_name,
 737                                                          unx_mode);
 738                                 need_re_stat = true;
 739                         }
 740
 741                         /* Change the owner if required. */
 742                         if (lp_inherit_owner(SNUM(conn))) {
 743                                 change_file_owner_to_parent(conn, parent_dir,
 744                                                             fsp);
 745                                 need_re_stat = true;
 746                         }
 747
 748                         if (need_re_stat) {
 749                                 if (fsp->fh->fd == -1) {
 750                                         ret = SMB_VFS_STAT(conn, smb_fname);
 751                                 } else {
 752                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 753                                         /* If we have an fd, this stat should succeed. */
 754                                         if (ret == -1) {
 755                                                 DEBUG(0,("Error doing fstat on open file %s "
 756                                                          "(%s)\n",
 757                                                          smb_fname_str_dbg(smb_fname),
 758                                                          strerror(errno) ));
 759                                         }
 760                                 }
 761                         }
 762
 763                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 764                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 765                                      smb_fname->base_name);
 766                 }
 767         }
 768
 769         /*
 770          * POSIX allows read-only opens of directories. We don't
 771          * want to do this (we use a different code path for this)
 772          * so catch a directory open and return an EISDIR. JRA.
 773          */
 774
 775         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 776                 fd_close(fsp);
 777                 errno = EISDIR;
 778                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 779         }
 780
 781         fsp->mode = smb_fname->st.st_ex_mode;
 782         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 783         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 784         fsp->file_pid = req ? req->smbpid : 0;
 785         fsp->can_lock = True;
 786         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 787         if (!CAN_WRITE(conn)) {
 788                 fsp->can_write = False;
 789         } else {
 790                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 791                         True : False;
 792         }
 793         fsp->print_file = NULL;
 794         fsp->modified = False;
 795         fsp->sent_oplock_break = NO_BREAK_SENT;
 796         fsp->is_directory = False;
 797         if (conn->aio_write_behind_list &&
 798             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 799                        conn->case_sensitive)) {
 800                 fsp->aio_write_behind = True;
 801         }
 802
 803         fsp->wcp = NULL; /* Write cache pointer. */
 804
 805         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 806                  conn->session_info->unix_info->unix_name,
 807                  smb_fname_str_dbg(smb_fname),
 808                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 809                  conn->num_files_open));
 810
 811         errno = 0;
 812         return NT_STATUS_OK;
 813 }
 814
 815 /****************************************************************************
 816  Check if we can open a file with a share mode.
 817  Returns True if conflict, False if not.
 818 ****************************************************************************/
 819
 820 static bool share_conflict(struct share_mode_entry *entry,
 821                            uint32 access_mask,
 822                            uint32 share_access)
 823 {
 824         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 825                   "entry->share_access = 0x%x, "
 826                   "entry->private_options = 0x%x\n",
 827                   (unsigned int)entry->access_mask,
 828                   (unsigned int)entry->share_access,
 829                   (unsigned int)entry->private_options));
 830
 831         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 832                   (unsigned int)access_mask, (unsigned int)share_access));
 833
 834         if ((entry->access_mask & (FILE_WRITE_DATA|
 835                                    FILE_APPEND_DATA|
 836                                    FILE_READ_DATA|
 837                                    FILE_EXECUTE|
 838                                    DELETE_ACCESS)) == 0) {
 839                 DEBUG(10,("share_conflict: No conflict due to "
 840                           "entry->access_mask = 0x%x\n",
 841                           (unsigned int)entry->access_mask ));
 842                 return False;
 843         }
 844
 845         if ((access_mask & (FILE_WRITE_DATA|
 846                             FILE_APPEND_DATA|
 847                             FILE_READ_DATA|
 848                             FILE_EXECUTE|
 849                             DELETE_ACCESS)) == 0) {
 850                 DEBUG(10,("share_conflict: No conflict due to "
 851                           "access_mask = 0x%x\n",
 852                           (unsigned int)access_mask ));
 853                 return False;
 854         }
 855
 856 #if 1 /* JRA TEST - Superdebug. */
 857 #define CHECK_MASK(num, am, right, sa, share) \
 858         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 859                 (unsigned int)(num), (unsigned int)(am), \
 860                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 861         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 862                 (unsigned int)(num), (unsigned int)(sa), \
 863                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 864         if (((am) & (right)) && !((sa) & (share))) { \
 865                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 867                         (unsigned int)(share) )); \
 868                 return True; \
 869         }
 870 #else
 871 #define CHECK_MASK(num, am, right, sa, share) \
 872         if (((am) & (right)) && !((sa) & (share))) { \
 873                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 875                         (unsigned int)(share) )); \
 876                 return True; \
 877         }
 878 #endif
 879
 880         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 881                    share_access, FILE_SHARE_WRITE);
 882         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 883                    entry->share_access, FILE_SHARE_WRITE);
 884
 885         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 886                    share_access, FILE_SHARE_READ);
 887         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 888                    entry->share_access, FILE_SHARE_READ);
 889
 890         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 891                    share_access, FILE_SHARE_DELETE);
 892         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 893                    entry->share_access, FILE_SHARE_DELETE);
 894
 895         DEBUG(10,("share_conflict: No conflict.\n"));
 896         return False;
 897 }
 898
 899 #if defined(DEVELOPER)
 900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 901                                       int num,
 902                                       struct share_mode_entry *share_entry)
 903 {
 904         files_struct *fsp;
 905
 906         if (!procid_is_me(&share_entry->pid)) {
 907                 return;
 908         }
 909
 910         if (is_deferred_open_entry(share_entry) &&
 911             !open_was_deferred(sconn, share_entry->op_mid)) {
 912                 char *str = talloc_asprintf(talloc_tos(),
 913                         "Got a deferred entry without a request: "
 914                         "PANIC: %s\n",
 915                         share_mode_str(talloc_tos(), num, share_entry));
 916                 smb_panic(str);
 917         }
 918
 919         if (!is_valid_share_mode_entry(share_entry)) {
 920                 return;
 921         }
 922
 923         fsp = file_find_dif(sconn, share_entry->id,
 924                             share_entry->share_file_id);
 925         if (!fsp) {
 926                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 927                          share_mode_str(talloc_tos(), num, share_entry) ));
 928                 smb_panic("validate_my_share_entries: Cannot match a "
 929                           "share entry with an open file\n");
 930         }
 931
 932         if (is_deferred_open_entry(share_entry)) {
 933                 goto panic;
 934         }
 935
 936         if ((share_entry->op_type == NO_OPLOCK) &&
 937             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 938                 /* Someone has already written to it, but I haven't yet
 939                  * noticed */
 940                 return;
 941         }
 942
 943         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 944                 goto panic;
 945         }
 946
 947         return;
 948
 949  panic:
 950         {
 951                 char *str;
 952                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 953                          share_mode_str(talloc_tos(), num, share_entry) ));
 954                 str = talloc_asprintf(talloc_tos(),
 955                         "validate_my_share_entries: "
 956                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 957                          fsp->fsp_name->base_name,
 958                          (unsigned int)fsp->oplock_type,
 959                          (unsigned int)share_entry->op_type );
 960                 smb_panic(str);
 961         }
 962 }
 963 #endif
 964
 965 bool is_stat_open(uint32 access_mask)
 966 {
 967         return (access_mask &&
 968                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 969                                   FILE_WRITE_ATTRIBUTES))==0) &&
 970                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 971                                  FILE_WRITE_ATTRIBUTES)) != 0));
 972 }
 973
 974 /****************************************************************************
 975  Deal with share modes
 976  Invarient: Share mode must be locked on entry and exit.
 977  Returns -1 on error, or number of share modes on success (may be zero).
 978 ****************************************************************************/
 979
 980 static NTSTATUS open_mode_check(connection_struct *conn,
 981                                 struct share_mode_lock *lck,
 982                                 uint32_t name_hash,
 983                                 uint32 access_mask,
 984                                 uint32 share_access,
 985                                 uint32 create_options,
 986                                 bool *file_existed)
 987 {
 988         int i;
 989
 990         if(lck->data->num_share_modes == 0) {
 991                 return NT_STATUS_OK;
 992         }
 993
 994         *file_existed = True;
 995
 996         /* A delete on close prohibits everything */
 997
 998         if (is_delete_on_close_set(lck, name_hash)) {
 999                 return NT_STATUS_DELETE_PENDING;
1000         }
1001
1002         if (is_stat_open(access_mask)) {
1003                 /* Stat open that doesn't trigger oplock breaks or share mode
1004                  * checks... ! JRA. */
1005                 return NT_STATUS_OK;
1006         }
1007
1008         /*
1009          * Check if the share modes will give us access.
1010          */
1011
1012 #if defined(DEVELOPER)
1013         for(i = 0; i < lck->data->num_share_modes; i++) {
1014                 validate_my_share_entries(conn->sconn, i,
1015                                           &lck->data->share_modes[i]);
1016         }
1017 #endif
1018
1019         if (!lp_share_modes(SNUM(conn))) {
1020                 return NT_STATUS_OK;
1021         }
1022
1023         /* Now we check the share modes, after any oplock breaks. */
1024         for(i = 0; i < lck->data->num_share_modes; i++) {
1025
1026                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1027                         continue;
1028                 }
1029
1030                 /* someone else has a share lock on it, check to see if we can
1031                  * too */
1032                 if (share_conflict(&lck->data->share_modes[i],
1033                                    access_mask, share_access)) {
1034                         return NT_STATUS_SHARING_VIOLATION;
1035                 }
1036         }
1037
1038         return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042         return ((fsp->access_mask == DELETE_ACCESS) &&
1043                 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047  * Send a break message to the oplock holder and delay the open for
1048  * our client.
1049  */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052                                         struct share_mode_entry *exclusive,
1053                                         uint64_t mid,
1054                                         int oplock_request)
1055 {
1056         NTSTATUS status;
1057         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059         DEBUG(10, ("Sending break request to PID %s\n",
1060                    procid_str_static(&exclusive->pid)));
1061         exclusive->op_mid = mid;
1062
1063         /* Create the message. */
1064         share_mode_entry_to_message(msg, exclusive);
1065
1066         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067            don't want this set in the share mode struct pointed to by lck. */
1068
1069         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072         }
1073
1074         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075                                     MSG_SMB_BREAK_REQUEST,
1076                                     (uint8 *)msg,
1077                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078         if (!NT_STATUS_IS_OK(status)) {
1079                 DEBUG(3, ("Could not send oplock break message: %s\n",
1080                           nt_errstr(status)));
1081         }
1082
1083         return status;
1084 }
1085
1086 /*
1087  * Return share_mode_entry pointers for :
1088  * 1). Batch oplock entry.
1089  * 2). Batch or exclusive oplock entry (may be identical to #1).
1090  * bool have_level2_oplock
1091  * bool have_no_oplock.
1092  * Do internal consistency checks on the share mode for a file.
1093  */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096                                 int oplock_request,
1097                                 const struct share_mode_lock *lck,
1098                                 struct share_mode_entry **pp_batch,
1099                                 struct share_mode_entry **pp_ex_or_batch,
1100                                 bool *got_level2,
1101                                 bool *got_no_oplock)
1102 {
1103         int i;
1104
1105         *pp_batch = NULL;
1106         *pp_ex_or_batch = NULL;
1107         *got_level2 = false;
1108         *got_no_oplock = false;
1109
1110         /* Ignore stat or internal opens, as is done in
1111                 delay_for_batch_oplocks() and
1112                 delay_for_exclusive_oplocks().
1113          */
1114         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115                 return;
1116         }
1117
1118         for (i=0; i<lck->data->num_share_modes; i++) {
1119                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1120                         continue;
1121                 }
1122
1123                 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1124                                 is_stat_open(lck->data->share_modes[i].access_mask)) {
1125                         /* We ignore stat opens in the table - they
1126                            always have NO_OPLOCK and never get or
1127                            cause breaks. JRA. */
1128                         continue;
1129                 }
1130
1131                 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1132                         /* batch - can only be one. */
1133                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134                                 smb_panic("Bad batch oplock entry.");
1135                         }
1136                         *pp_batch = &lck->data->share_modes[i];
1137                 }
1138
1139                 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1140                         /* Exclusive or batch - can only be one. */
1141                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142                                 smb_panic("Bad exclusive or batch oplock entry.");
1143                         }
1144                         *pp_ex_or_batch = &lck->data->share_modes[i];
1145                 }
1146
1147                 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1148                         if (*pp_batch || *pp_ex_or_batch) {
1149                                 smb_panic("Bad levelII oplock entry.");
1150                         }
1151                         *got_level2 = true;
1152                 }
1153
1154                 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1155                         if (*pp_batch || *pp_ex_or_batch) {
1156                                 smb_panic("Bad no oplock entry.");
1157                         }
1158                         *got_no_oplock = true;
1159                 }
1160         }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164                                         uint64_t mid,
1165                                         int oplock_request,
1166                                         struct share_mode_entry *batch_entry)
1167 {
1168         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169                 return false;
1170         }
1171         if (batch_entry == NULL) {
1172                 return false;
1173         }
1174
1175         /* Found a batch oplock */
1176         send_break_message(fsp, batch_entry, mid, oplock_request);
1177         return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181                                         uint64_t mid,
1182                                         int oplock_request,
1183                                         struct share_mode_entry *ex_entry)
1184 {
1185         bool delay_it;
1186
1187         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188                 return false;
1189         }
1190         if (ex_entry == NULL) {
1191                 return false;
1192         }
1193
1194         /* Found an exclusive or batch oplock */
1195
1196         delay_it = is_delete_request(fsp) ?
1197                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199         if (!delay_it) {
1200                 return false;
1201         }
1202
1203         send_break_message(fsp, ex_entry, mid, oplock_request);
1204         return true;
1205 }
1206
1207 static bool file_has_brlocks(files_struct *fsp)
1208 {
1209         struct byte_range_lock *br_lck;
1210
1211         br_lck = brl_get_locks_readonly(fsp);
1212         if (!br_lck)
1213                 return false;
1214
1215         return br_lck->num_locks > 0 ? true : false;
1216 }
1217
1218 static void grant_fsp_oplock_type(files_struct *fsp,
1219                                 int oplock_request,
1220                                 bool got_level2_oplock,
1221                                 bool got_a_none_oplock)
1222 {
1223         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1224                             lp_level2_oplocks(SNUM(fsp->conn));
1225
1226         /* Start by granting what the client asked for,
1227            but ensure no SAMBA_PRIVATE bits can be set. */
1228         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1229
1230         if (oplock_request & INTERNAL_OPEN_ONLY) {
1231                 /* No oplocks on internal open. */
1232                 fsp->oplock_type = NO_OPLOCK;
1233                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1234                         fsp->oplock_type, fsp_str_dbg(fsp)));
1235                 return;
1236         } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1237                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1238                         fsp_str_dbg(fsp)));
1239                 fsp->oplock_type = NO_OPLOCK;
1240         }
1241
1242         if (is_stat_open(fsp->access_mask)) {
1243                 /* Leave the value already set. */
1244                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1245                         fsp->oplock_type, fsp_str_dbg(fsp)));
1246                 return;
1247         }
1248
1249         /*
1250          * Match what was requested (fsp->oplock_type) with
1251          * what was found in the existing share modes.
1252          */
1253
1254         if (got_a_none_oplock) {
1255                 fsp->oplock_type = NO_OPLOCK;
1256         } else if (got_level2_oplock) {
1257                 if (fsp->oplock_type == NO_OPLOCK ||
1258                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1259                         /* Store a level2 oplock, but don't tell the client */
1260                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261                 } else {
1262                         fsp->oplock_type = LEVEL_II_OPLOCK;
1263                 }
1264         } else {
1265                 /* All share_mode_entries are placeholders or deferred.
1266                  * Silently upgrade to fake levelII if the client didn't
1267                  * ask for an oplock. */
1268                 if (fsp->oplock_type == NO_OPLOCK) {
1269                         /* Store a level2 oplock, but don't tell the client */
1270                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1271                 }
1272         }
1273
1274         /*
1275          * Don't grant level2 to clients that don't want them
1276          * or if we've turned them off.
1277          */
1278         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1279                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1280         }
1281
1282         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1283                   fsp->oplock_type, fsp_str_dbg(fsp)));
1284 }
1285
1286 bool request_timed_out(struct timeval request_time,
1287                        struct timeval timeout)
1288 {
1289         struct timeval now, end_time;
1290         GetTimeOfDay(&now);
1291         end_time = timeval_sum(&request_time, &timeout);
1292         return (timeval_compare(&end_time, &now) < 0);
1293 }
1294
1295 /****************************************************************************
1296  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1297 ****************************************************************************/
1298
1299 static void defer_open(struct share_mode_lock *lck,
1300                        struct timeval request_time,
1301                        struct timeval timeout,
1302                        struct smb_request *req,
1303                        struct deferred_open_record *state)
1304 {
1305         int i;
1306
1307         /* Paranoia check */
1308
1309         for (i=0; i<lck->data->num_share_modes; i++) {
1310                 struct share_mode_entry *e = &lck->data->share_modes[i];
1311
1312                 if (is_deferred_open_entry(e) &&
1313                     procid_is_me(&e->pid) &&
1314                     (e->op_mid == req->mid)) {
1315                         DEBUG(0, ("Trying to defer an already deferred "
1316                                 "request: mid=%llu, exiting\n",
1317                                 (unsigned long long)req->mid));
1318                         exit_server("attempt to defer a deferred request");
1319                 }
1320         }
1321
1322         /* End paranoia check */
1323
1324         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1325                   "open entry for mid %llu\n",
1326                   (unsigned int)request_time.tv_sec,
1327                   (unsigned int)request_time.tv_usec,
1328                   (unsigned long long)req->mid));
1329
1330         if (!push_deferred_open_message_smb(req, request_time, timeout,
1331                                        state->id, (char *)state, sizeof(*state))) {
1332                 exit_server("push_deferred_open_message_smb failed");
1333         }
1334         add_deferred_open(lck, req->mid, request_time,
1335                           messaging_server_id(req->sconn->msg_ctx), state->id);
1336 }
1337
1338
1339 /****************************************************************************
1340  On overwrite open ensure that the attributes match.
1341 ****************************************************************************/
1342
1343 bool open_match_attributes(connection_struct *conn,
1344                            uint32 old_dos_attr,
1345                            uint32 new_dos_attr,
1346                            mode_t existing_unx_mode,
1347                            mode_t new_unx_mode,
1348                            mode_t *returned_unx_mode)
1349 {
1350         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1351
1352         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1353         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1354
1355         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1356            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1357                 *returned_unx_mode = new_unx_mode;
1358         } else {
1359                 *returned_unx_mode = (mode_t)0;
1360         }
1361
1362         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1363                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1364                   "returned_unx_mode = 0%o\n",
1365                   (unsigned int)old_dos_attr,
1366                   (unsigned int)existing_unx_mode,
1367                   (unsigned int)new_dos_attr,
1368                   (unsigned int)*returned_unx_mode ));
1369
1370         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1371         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1372                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1373                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1374                         return False;
1375                 }
1376         }
1377         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1378                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1379                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1380                         return False;
1381                 }
1382         }
1383         return True;
1384 }
1385
1386 /****************************************************************************
1387  Special FCB or DOS processing in the case of a sharing violation.
1388  Try and find a duplicated file handle.
1389 ****************************************************************************/
1390
1391 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1392                                      connection_struct *conn,
1393                                      files_struct *fsp_to_dup_into,
1394                                      const struct smb_filename *smb_fname,
1395                                      struct file_id id,
1396                                      uint16 file_pid,
1397                                      uint16 vuid,
1398                                      uint32 access_mask,
1399                                      uint32 share_access,
1400                                      uint32 create_options)
1401 {
1402         files_struct *fsp;
1403
1404         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1405                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1406
1407         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1408             fsp = file_find_di_next(fsp)) {
1409
1410                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1411                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1412                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1413                           fsp->fh->fd, (unsigned int)fsp->vuid,
1414                           (unsigned int)fsp->file_pid,
1415                           (unsigned int)fsp->fh->private_options,
1416                           (unsigned int)fsp->access_mask ));
1417
1418                 if (fsp->fh->fd != -1 &&
1419                     fsp->vuid == vuid &&
1420                     fsp->file_pid == file_pid &&
1421                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1422                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1423                     (fsp->access_mask & FILE_WRITE_DATA) &&
1424                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1425                     strequal(fsp->fsp_name->stream_name,
1426                              smb_fname->stream_name)) {
1427                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1428                         break;
1429                 }
1430         }
1431
1432         if (!fsp) {
1433                 return NT_STATUS_NOT_FOUND;
1434         }
1435
1436         /* quite an insane set of semantics ... */
1437         if (is_executable(smb_fname->base_name) &&
1438             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1439                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1440                 return NT_STATUS_INVALID_PARAMETER;
1441         }
1442
1443         /* We need to duplicate this fsp. */
1444         return dup_file_fsp(req, fsp, access_mask, share_access,
1445                             create_options, fsp_to_dup_into);
1446 }
1447
1448 static void schedule_defer_open(struct share_mode_lock *lck,
1449                                 struct timeval request_time,
1450                                 struct smb_request *req)
1451 {
1452         struct deferred_open_record state;
1453
1454         /* This is a relative time, added to the absolute
1455            request_time value to get the absolute timeout time.
1456            Note that if this is the second or greater time we enter
1457            this codepath for this particular request mid then
1458            request_time is left as the absolute time of the *first*
1459            time this request mid was processed. This is what allows
1460            the request to eventually time out. */
1461
1462         struct timeval timeout;
1463
1464         /* Normally the smbd we asked should respond within
1465          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1466          * the client did, give twice the timeout as a safety
1467          * measure here in case the other smbd is stuck
1468          * somewhere else. */
1469
1470         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1471
1472         /* Nothing actually uses state.delayed_for_oplocks
1473            but it's handy to differentiate in debug messages
1474            between a 30 second delay due to oplock break, and
1475            a 1 second delay for share mode conflicts. */
1476
1477         state.delayed_for_oplocks = True;
1478         state.id = lck->data->id;
1479
1480         if (!request_timed_out(request_time, timeout)) {
1481                 defer_open(lck, request_time, timeout, req, &state);
1482         }
1483 }
1484
1485 /****************************************************************************
1486  Work out what access_mask to use from what the client sent us.
1487 ****************************************************************************/
1488
1489 static NTSTATUS smbd_calculate_maximum_allowed_access(
1490         connection_struct *conn,
1491         const struct smb_filename *smb_fname,
1492         uint32_t *p_access_mask)
1493 {
1494         struct security_descriptor *sd;
1495         uint32_t access_granted;
1496         NTSTATUS status;
1497
1498         if (get_current_uid(conn) == (uid_t)0) {
1499                 *p_access_mask |= FILE_GENERIC_ALL;
1500                 return NT_STATUS_OK;
1501         }
1502
1503         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1504                                     (SECINFO_OWNER |
1505                                      SECINFO_GROUP |
1506                                      SECINFO_DACL),&sd);
1507
1508         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1509                 /*
1510                  * File did not exist
1511                  */
1512                 *p_access_mask = FILE_GENERIC_ALL;
1513                 return NT_STATUS_OK;
1514         }
1515         if (!NT_STATUS_IS_OK(status)) {
1516                 DEBUG(10,("smbd_calculate_access_mask: "
1517                           "Could not get acl on file %s: %s\n",
1518                           smb_fname_str_dbg(smb_fname),
1519                           nt_errstr(status)));
1520                 return NT_STATUS_ACCESS_DENIED;
1521         }
1522
1523         /*
1524          * Never test FILE_READ_ATTRIBUTES. se_access_check()
1525          * also takes care of owner WRITE_DAC and READ_CONTROL.
1526          */
1527         status = se_access_check(sd,
1528                                  get_current_nttok(conn),
1529                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1530                                  &access_granted);
1531
1532         TALLOC_FREE(sd);
1533
1534         if (!NT_STATUS_IS_OK(status)) {
1535                 DEBUG(10, ("smbd_calculate_access_mask: "
1536                            "Access denied on file %s: "
1537                            "when calculating maximum access\n",
1538                            smb_fname_str_dbg(smb_fname)));
1539                 return NT_STATUS_ACCESS_DENIED;
1540         }
1541         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1542         return NT_STATUS_OK;
1543 }
1544
1545 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1546                                     const struct smb_filename *smb_fname,
1547                                     uint32_t access_mask,
1548                                     uint32_t *access_mask_out)
1549 {
1550         NTSTATUS status;
1551         uint32_t orig_access_mask = access_mask;
1552         uint32_t rejected_share_access;
1553
1554         /*
1555          * Convert GENERIC bits to specific bits.
1556          */
1557
1558         se_map_generic(&access_mask, &file_generic_mapping);
1559
1560         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1561         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1562
1563                 status = smbd_calculate_maximum_allowed_access(
1564                         conn, smb_fname, &access_mask);
1565
1566                 if (!NT_STATUS_IS_OK(status)) {
1567                         return status;
1568                 }
1569
1570                 access_mask &= conn->share_access;
1571         }
1572
1573         rejected_share_access = access_mask & ~(conn->share_access);
1574
1575         if (rejected_share_access) {
1576                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1577                         "file %s: rejected by share access mask[0x%08X] "
1578                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1579                         smb_fname_str_dbg(smb_fname),
1580                         conn->share_access,
1581                         orig_access_mask, access_mask,
1582                         rejected_share_access));
1583                 return NT_STATUS_ACCESS_DENIED;
1584         }
1585
1586         *access_mask_out = access_mask;
1587         return NT_STATUS_OK;
1588 }
1589
1590 /****************************************************************************
1591  Remove the deferred open entry under lock.
1592 ****************************************************************************/
1593
1594 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1595                                 struct server_id pid)
1596 {
1597         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id);
1598         if (lck == NULL) {
1599                 DEBUG(0, ("could not get share mode lock\n"));
1600                 return;
1601         }
1602         del_deferred_open_entry(lck, mid, pid);
1603         TALLOC_FREE(lck);
1604 }
1605
1606 /****************************************************************************
1607  Open a file with a share mode. Passed in an already created files_struct *.
1608 ****************************************************************************/
1609
1610 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1611                             struct smb_request *req,
1612                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1613                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1614                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1615                             uint32 create_options,      /* options such as delete on close. */
1616                             uint32 new_dos_attributes,  /* attributes used for new file. */
1617                             int oplock_request,         /* internal Samba oplock codes. */
1618                                                         /* Information (FILE_EXISTS etc.) */
1619                             uint32_t private_flags,     /* Samba specific flags. */
1620                             int *pinfo,
1621                             files_struct *fsp)
1622 {
1623         struct smb_filename *smb_fname = fsp->fsp_name;
1624         int flags=0;
1625         int flags2=0;
1626         bool file_existed = VALID_STAT(smb_fname->st);
1627         bool def_acl = False;
1628         bool posix_open = False;
1629         bool new_file_created = False;
1630         bool clear_ads = false;
1631         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1632         mode_t new_unx_mode = (mode_t)0;
1633         mode_t unx_mode = (mode_t)0;
1634         int info;
1635         uint32 existing_dos_attributes = 0;
1636         struct timeval request_time = timeval_zero();
1637         struct share_mode_lock *lck = NULL;
1638         uint32 open_access_mask = access_mask;
1639         NTSTATUS status;
1640         char *parent_dir;
1641
1642         if (conn->printer) {
1643                 /*
1644                  * Printers are handled completely differently.
1645                  * Most of the passed parameters are ignored.
1646                  */
1647
1648                 if (pinfo) {
1649                         *pinfo = FILE_WAS_CREATED;
1650                 }
1651
1652                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1653                            smb_fname_str_dbg(smb_fname)));
1654
1655                 if (!req) {
1656                         DEBUG(0,("open_file_ntcreate: printer open without "
1657                                 "an SMB request!\n"));
1658                         return NT_STATUS_INTERNAL_ERROR;
1659                 }
1660
1661                 return print_spool_open(fsp, smb_fname->base_name,
1662                                         req->vuid);
1663         }
1664
1665         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1666                             NULL)) {
1667                 return NT_STATUS_NO_MEMORY;
1668         }
1669
1670         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1671                 posix_open = True;
1672                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1673                 new_dos_attributes = 0;
1674         } else {
1675                 /* Windows allows a new file to be created and
1676                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1677                    sent by the client. Do the same. */
1678
1679                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1680
1681                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1682                  * created new. */
1683                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1684                                      smb_fname, parent_dir);
1685         }
1686
1687         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1688                    "access_mask=0x%x share_access=0x%x "
1689                    "create_disposition = 0x%x create_options=0x%x "
1690                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1691                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1692                    access_mask, share_access, create_disposition,
1693                    create_options, (unsigned int)unx_mode, oplock_request,
1694                    (unsigned int)private_flags));
1695
1696         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1697                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1698                 return NT_STATUS_INTERNAL_ERROR;
1699         }
1700
1701         /*
1702          * Only non-internal opens can be deferred at all
1703          */
1704
1705         if (req) {
1706                 void *ptr;
1707                 if (get_deferred_open_message_state(req,
1708                                 &request_time,
1709                                 &ptr)) {
1710
1711                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1712                         /* Remember the absolute time of the original
1713                            request with this mid. We'll use it later to
1714                            see if this has timed out. */
1715
1716                         /* Remove the deferred open entry under lock. */
1717                         remove_deferred_open_entry(
1718                                 state->id, req->mid,
1719                                 messaging_server_id(req->sconn->msg_ctx));
1720
1721                         /* Ensure we don't reprocess this message. */
1722                         remove_deferred_open_message_smb(req->sconn, req->mid);
1723                 }
1724         }
1725
1726         if (!posix_open) {
1727                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1728                 if (file_existed) {
1729                         existing_dos_attributes = dos_mode(conn, smb_fname);
1730                 }
1731         }
1732
1733         /* ignore any oplock requests if oplocks are disabled */
1734         if (!lp_oplocks(SNUM(conn)) ||
1735             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1736                 /* Mask off everything except the private Samba bits. */
1737                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1738         }
1739
1740         /* this is for OS/2 long file names - say we don't support them */
1741         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1742                 /* OS/2 Workplace shell fix may be main code stream in a later
1743                  * release. */
1744                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1745                          "supported.\n"));
1746                 if (use_nt_status()) {
1747                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1748                 }
1749                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1750         }
1751
1752         switch( create_disposition ) {
1753                 /*
1754                  * Currently we're using FILE_SUPERSEDE as the same as
1755                  * FILE_OVERWRITE_IF but they really are
1756                  * different. FILE_SUPERSEDE deletes an existing file
1757                  * (requiring delete access) then recreates it.
1758                  */
1759                 case FILE_SUPERSEDE:
1760                         /* If file exists replace/overwrite. If file doesn't
1761                          * exist create. */
1762                         flags2 |= (O_CREAT | O_TRUNC);
1763                         clear_ads = true;
1764                         break;
1765
1766                 case FILE_OVERWRITE_IF:
1767                         /* If file exists replace/overwrite. If file doesn't
1768                          * exist create. */
1769                         flags2 |= (O_CREAT | O_TRUNC);
1770                         clear_ads = true;
1771                         break;
1772
1773                 case FILE_OPEN:
1774                         /* If file exists open. If file doesn't exist error. */
1775                         if (!file_existed) {
1776                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1777                                          "requested for file %s and file "
1778                                          "doesn't exist.\n",
1779                                          smb_fname_str_dbg(smb_fname)));
1780                                 errno = ENOENT;
1781                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1782                         }
1783                         break;
1784
1785                 case FILE_OVERWRITE:
1786                         /* If file exists overwrite. If file doesn't exist
1787                          * error. */
1788                         if (!file_existed) {
1789                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1790                                          "requested for file %s and file "
1791                                          "doesn't exist.\n",
1792                                          smb_fname_str_dbg(smb_fname) ));
1793                                 errno = ENOENT;
1794                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1795                         }
1796                         flags2 |= O_TRUNC;
1797                         clear_ads = true;
1798                         break;
1799
1800                 case FILE_CREATE:
1801                         /* If file exists error. If file doesn't exist
1802                          * create. */
1803                         if (file_existed) {
1804                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1805                                          "requested for file %s and file "
1806                                          "already exists.\n",
1807                                          smb_fname_str_dbg(smb_fname)));
1808                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1809                                         errno = EISDIR;
1810                                 } else {
1811                                         errno = EEXIST;
1812                                 }
1813                                 return map_nt_error_from_unix(errno);
1814                         }
1815                         flags2 |= (O_CREAT|O_EXCL);
1816                         break;
1817
1818                 case FILE_OPEN_IF:
1819                         /* If file exists open. If file doesn't exist
1820                          * create. */
1821                         flags2 |= O_CREAT;
1822                         break;
1823
1824                 default:
1825                         return NT_STATUS_INVALID_PARAMETER;
1826         }
1827
1828         /* We only care about matching attributes on file exists and
1829          * overwrite. */
1830
1831         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1832                              (create_disposition == FILE_OVERWRITE_IF))) {
1833                 if (!open_match_attributes(conn, existing_dos_attributes,
1834                                            new_dos_attributes,
1835                                            smb_fname->st.st_ex_mode,
1836                                            unx_mode, &new_unx_mode)) {
1837                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1838                                  "for file %s (%x %x) (0%o, 0%o)\n",
1839                                  smb_fname_str_dbg(smb_fname),
1840                                  existing_dos_attributes,
1841                                  new_dos_attributes,
1842                                  (unsigned int)smb_fname->st.st_ex_mode,
1843                                  (unsigned int)unx_mode ));
1844                         errno = EACCES;
1845                         return NT_STATUS_ACCESS_DENIED;
1846                 }
1847         }
1848
1849         status = smbd_calculate_access_mask(conn, smb_fname,
1850                                         access_mask,
1851                                         &access_mask);
1852         if (!NT_STATUS_IS_OK(status)) {
1853                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1854                         "on file %s returned %s\n",
1855                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1856                 return status;
1857         }
1858
1859         open_access_mask = access_mask;
1860
1861         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1862                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1863         }
1864
1865         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1866                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1867                     access_mask));
1868
1869         /*
1870          * Note that we ignore the append flag as append does not
1871          * mean the same thing under DOS and Unix.
1872          */
1873
1874         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1875                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1876                 /* DENY_DOS opens are always underlying read-write on the
1877                    file handle, no matter what the requested access mask
1878                     says. */
1879                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1880                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1881                         flags = O_RDWR;
1882                 } else {
1883                         flags = O_WRONLY;
1884                 }
1885         } else {
1886                 flags = O_RDONLY;
1887         }
1888
1889         /*
1890          * Currently we only look at FILE_WRITE_THROUGH for create options.
1891          */
1892
1893 #if defined(O_SYNC)
1894         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1895                 flags2 |= O_SYNC;
1896         }
1897 #endif /* O_SYNC */
1898
1899         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1900                 flags2 |= O_APPEND;
1901         }
1902
1903         if (!posix_open && !CAN_WRITE(conn)) {
1904                 /*
1905                  * We should really return a permission denied error if either
1906                  * O_CREAT or O_TRUNC are set, but for compatibility with
1907                  * older versions of Samba we just AND them out.
1908                  */
1909                 flags2 &= ~(O_CREAT|O_TRUNC);
1910         }
1911
1912         /*
1913          * Ensure we can't write on a read-only share or file.
1914          */
1915
1916         if (flags != O_RDONLY && file_existed &&
1917             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1918                 DEBUG(5,("open_file_ntcreate: write access requested for "
1919                          "file %s on read only %s\n",
1920                          smb_fname_str_dbg(smb_fname),
1921                          !CAN_WRITE(conn) ? "share" : "file" ));
1922                 errno = EACCES;
1923                 return NT_STATUS_ACCESS_DENIED;
1924         }
1925
1926         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1927         fsp->share_access = share_access;
1928         fsp->fh->private_options = private_flags;
1929         fsp->access_mask = open_access_mask; /* We change this to the
1930                                               * requested access_mask after
1931                                               * the open is done. */
1932         fsp->posix_open = posix_open;
1933
1934         /* Ensure no SAMBA_PRIVATE bits can be set. */
1935         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1936
1937         if (timeval_is_zero(&request_time)) {
1938                 request_time = fsp->open_time;
1939         }
1940
1941         if (file_existed) {
1942                 struct share_mode_entry *batch_entry = NULL;
1943                 struct share_mode_entry *exclusive_entry = NULL;
1944                 bool got_level2_oplock = false;
1945                 bool got_a_none_oplock = false;
1946                 struct file_id id;
1947
1948                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1949                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1950
1951                 lck = get_share_mode_lock_fresh(talloc_tos(), id,
1952                                                 conn->connectpath,
1953                                                 smb_fname, &old_write_time);
1954                 if (lck == NULL) {
1955                         DEBUG(0, ("Could not get share mode lock\n"));
1956                         return NT_STATUS_SHARING_VIOLATION;
1957                 }
1958
1959                 /* Get the types we need to examine. */
1960                 find_oplock_types(fsp,
1961                                 oplock_request,
1962                                 lck,
1963                                 &batch_entry,
1964                                 &exclusive_entry,
1965                                 &got_level2_oplock,
1966                                 &got_a_none_oplock);
1967
1968                 /* First pass - send break only on batch oplocks. */
1969                 if ((req != NULL) &&
1970                                 delay_for_batch_oplocks(fsp,
1971                                         req->mid,
1972                                         oplock_request,
1973                                         batch_entry)) {
1974                         schedule_defer_open(lck, request_time, req);
1975                         TALLOC_FREE(lck);
1976                         return NT_STATUS_SHARING_VIOLATION;
1977                 }
1978
1979                 /* Use the client requested access mask here, not the one we
1980                  * open with. */
1981                 status = open_mode_check(conn, lck, fsp->name_hash,
1982                                         access_mask, share_access,
1983                                          create_options, &file_existed);
1984
1985                 if (NT_STATUS_IS_OK(status)) {
1986                         /* We might be going to allow this open. Check oplock
1987                          * status again. */
1988                         /* Second pass - send break for both batch or
1989                          * exclusive oplocks. */
1990                         if ((req != NULL) &&
1991                                         delay_for_exclusive_oplocks(
1992                                                 fsp,
1993                                                 req->mid,
1994                                                 oplock_request,
1995                                                 exclusive_entry)) {
1996                                 schedule_defer_open(lck, request_time, req);
1997                                 TALLOC_FREE(lck);
1998                                 return NT_STATUS_SHARING_VIOLATION;
1999                         }
2000                 }
2001
2002                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2003                         /* DELETE_PENDING is not deferred for a second */
2004                         TALLOC_FREE(lck);
2005                         return status;
2006                 }
2007
2008                 grant_fsp_oplock_type(fsp,
2009                                 oplock_request,
2010                                 got_level2_oplock,
2011                                 got_a_none_oplock);
2012
2013                 if (!NT_STATUS_IS_OK(status)) {
2014                         uint32 can_access_mask;
2015                         bool can_access = True;
2016
2017                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2018
2019                         /* Check if this can be done with the deny_dos and fcb
2020                          * calls. */
2021                         if (private_flags &
2022                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2023                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2024                                 if (req == NULL) {
2025                                         DEBUG(0, ("DOS open without an SMB "
2026                                                   "request!\n"));
2027                                         TALLOC_FREE(lck);
2028                                         return NT_STATUS_INTERNAL_ERROR;
2029                                 }
2030
2031                                 /* Use the client requested access mask here,
2032                                  * not the one we open with. */
2033                                 status = fcb_or_dos_open(req,
2034                                                         conn,
2035                                                         fsp,
2036                                                         smb_fname,
2037                                                         id,
2038                                                         req->smbpid,
2039                                                         req->vuid,
2040                                                         access_mask,
2041                                                         share_access,
2042                                                         create_options);
2043
2044                                 if (NT_STATUS_IS_OK(status)) {
2045                                         TALLOC_FREE(lck);
2046                                         if (pinfo) {
2047                                                 *pinfo = FILE_WAS_OPENED;
2048                                         }
2049                                         return NT_STATUS_OK;
2050                                 }
2051                         }
2052
2053                         /*
2054                          * This next line is a subtlety we need for
2055                          * MS-Access. If a file open will fail due to share
2056                          * permissions and also for security (access) reasons,
2057                          * we need to return the access failed error, not the
2058                          * share error. We can't open the file due to kernel
2059                          * oplock deadlock (it's possible we failed above on
2060                          * the open_mode_check()) so use a userspace check.
2061                          */
2062
2063                         if (flags & O_RDWR) {
2064                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2065                         } else if (flags & O_WRONLY) {
2066                                 can_access_mask = FILE_WRITE_DATA;
2067                         } else {
2068                                 can_access_mask = FILE_READ_DATA;
2069                         }
2070
2071                         if (((can_access_mask & FILE_WRITE_DATA) &&
2072                                 !CAN_WRITE(conn)) ||
2073                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2074                                                 smb_fname, can_access_mask))) {
2075                                 can_access = False;
2076                         }
2077
2078                         /*
2079                          * If we're returning a share violation, ensure we
2080                          * cope with the braindead 1 second delay.
2081                          */
2082
2083                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2084                             lp_defer_sharing_violations()) {
2085                                 struct timeval timeout;
2086                                 struct deferred_open_record state;
2087                                 int timeout_usecs;
2088
2089                                 /* this is a hack to speed up torture tests
2090                                    in 'make test' */
2091                                 timeout_usecs = lp_parm_int(SNUM(conn),
2092                                                             "smbd","sharedelay",
2093                                                             SHARING_VIOLATION_USEC_WAIT);
2094
2095                                 /* This is a relative time, added to the absolute
2096                                    request_time value to get the absolute timeout time.
2097                                    Note that if this is the second or greater time we enter
2098                                    this codepath for this particular request mid then
2099                                    request_time is left as the absolute time of the *first*
2100                                    time this request mid was processed. This is what allows
2101                                    the request to eventually time out. */
2102
2103                                 timeout = timeval_set(0, timeout_usecs);
2104
2105                                 /* Nothing actually uses state.delayed_for_oplocks
2106                                    but it's handy to differentiate in debug messages
2107                                    between a 30 second delay due to oplock break, and
2108                                    a 1 second delay for share mode conflicts. */
2109
2110                                 state.delayed_for_oplocks = False;
2111                                 state.id = id;
2112
2113                                 if ((req != NULL)
2114                                     && !request_timed_out(request_time,
2115                                                           timeout)) {
2116                                         defer_open(lck, request_time, timeout,
2117                                                    req, &state);
2118                                 }
2119                         }
2120
2121                         TALLOC_FREE(lck);
2122                         if (can_access) {
2123                                 /*
2124                                  * We have detected a sharing violation here
2125                                  * so return the correct error code
2126                                  */
2127                                 status = NT_STATUS_SHARING_VIOLATION;
2128                         } else {
2129                                 status = NT_STATUS_ACCESS_DENIED;
2130                         }
2131                         return status;
2132                 }
2133
2134                 /*
2135                  * We exit this block with the share entry *locked*.....
2136                  */
2137         }
2138
2139         SMB_ASSERT(!file_existed || (lck != NULL));
2140
2141         /*
2142          * Ensure we pay attention to default ACLs on directories if required.
2143          */
2144
2145         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2146             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2147                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2148         }
2149
2150         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2151                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2152                  (unsigned int)flags, (unsigned int)flags2,
2153                  (unsigned int)unx_mode, (unsigned int)access_mask,
2154                  (unsigned int)open_access_mask));
2155
2156         /*
2157          * open_file strips any O_TRUNC flags itself.
2158          */
2159
2160         fsp_open = open_file(fsp, conn, req, parent_dir,
2161                              flags|flags2, unx_mode, access_mask,
2162                              open_access_mask);
2163
2164         if (!NT_STATUS_IS_OK(fsp_open)) {
2165                 TALLOC_FREE(lck);
2166                 return fsp_open;
2167         }
2168
2169         if (!file_existed) {
2170                 struct share_mode_entry *batch_entry = NULL;
2171                 struct share_mode_entry *exclusive_entry = NULL;
2172                 bool got_level2_oplock = false;
2173                 bool got_a_none_oplock = false;
2174                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2175                 struct file_id id;
2176                 /*
2177                  * Deal with the race condition where two smbd's detect the
2178                  * file doesn't exist and do the create at the same time. One
2179                  * of them will win and set a share mode, the other (ie. this
2180                  * one) should check if the requested share mode for this
2181                  * create is allowed.
2182                  */
2183
2184                 /*
2185                  * Now the file exists and fsp is successfully opened,
2186                  * fsp->dev and fsp->inode are valid and should replace the
2187                  * dev=0,inode=0 from a non existent file. Spotted by
2188                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2189                  */
2190
2191                 id = fsp->file_id;
2192
2193                 lck = get_share_mode_lock_fresh(talloc_tos(), id,
2194                                                 conn->connectpath,
2195                                                 smb_fname, &old_write_time);
2196
2197                 if (lck == NULL) {
2198                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2199                                   "mode lock for %s\n",
2200                                   smb_fname_str_dbg(smb_fname)));
2201                         fd_close(fsp);
2202                         return NT_STATUS_SHARING_VIOLATION;
2203                 }
2204
2205                 /* Get the types we need to examine. */
2206                 find_oplock_types(fsp,
2207                                 oplock_request,
2208                                 lck,
2209                                 &batch_entry,
2210                                 &exclusive_entry,
2211                                 &got_level2_oplock,
2212                                 &got_a_none_oplock);
2213
2214                 /* First pass - send break only on batch oplocks. */
2215                 if ((req != NULL) &&
2216                                 delay_for_batch_oplocks(fsp,
2217                                         req->mid,
2218                                         oplock_request,
2219                                         batch_entry)) {
2220                         schedule_defer_open(lck, request_time, req);
2221                         TALLOC_FREE(lck);
2222                         fd_close(fsp);
2223                         return NT_STATUS_SHARING_VIOLATION;
2224                 }
2225
2226                 status = open_mode_check(conn, lck, fsp->name_hash,
2227                                         access_mask, share_access,
2228                                          create_options, &file_existed);
2229
2230                 if (NT_STATUS_IS_OK(status)) {
2231                         /* We might be going to allow this open. Check oplock
2232                          * status again. */
2233                         /* Second pass - send break for both batch or
2234                          * exclusive oplocks. */
2235                         if ((req != NULL) &&
2236                                         delay_for_exclusive_oplocks(
2237                                                 fsp,
2238                                                 req->mid,
2239                                                 oplock_request,
2240                                                 exclusive_entry)) {
2241                                 schedule_defer_open(lck, request_time, req);
2242                                 TALLOC_FREE(lck);
2243                                 fd_close(fsp);
2244                                 return NT_STATUS_SHARING_VIOLATION;
2245                         }
2246                 }
2247
2248                 if (!NT_STATUS_IS_OK(status)) {
2249                         struct deferred_open_record state;
2250
2251                         state.delayed_for_oplocks = False;
2252                         state.id = id;
2253
2254                         /* Do it all over again immediately. In the second
2255                          * round we will find that the file existed and handle
2256                          * the DELETE_PENDING and FCB cases correctly. No need
2257                          * to duplicate the code here. Essentially this is a
2258                          * "goto top of this function", but don't tell
2259                          * anybody... */
2260
2261                         if (req != NULL) {
2262                                 defer_open(lck, request_time, timeval_zero(),
2263                                            req, &state);
2264                         }
2265                         TALLOC_FREE(lck);
2266                         fd_close(fsp);
2267                         return status;
2268                 }
2269
2270                 grant_fsp_oplock_type(fsp,
2271                                 oplock_request,
2272                                 got_level2_oplock,
2273                                 got_a_none_oplock);
2274
2275                 /*
2276                  * We exit this block with the share entry *locked*.....
2277                  */
2278
2279         }
2280
2281         SMB_ASSERT(lck != NULL);
2282
2283         /* Delete streams if create_disposition requires it */
2284         if (file_existed && clear_ads &&
2285             !is_ntfs_stream_smb_fname(smb_fname)) {
2286                 status = delete_all_streams(conn, smb_fname->base_name);
2287                 if (!NT_STATUS_IS_OK(status)) {
2288                         TALLOC_FREE(lck);
2289                         fd_close(fsp);
2290                         return status;
2291                 }
2292         }
2293
2294         /* note that we ignore failure for the following. It is
2295            basically a hack for NFS, and NFS will never set one of
2296            these only read them. Nobody but Samba can ever set a deny
2297            mode and we have already checked our more authoritative
2298            locking database for permission to set this deny mode. If
2299            the kernel refuses the operations then the kernel is wrong.
2300            note that GPFS supports it as well - jmcd */
2301
2302         if (fsp->fh->fd != -1) {
2303                 int ret_flock;
2304                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2305                 if(ret_flock == -1 ){
2306
2307                         TALLOC_FREE(lck);
2308                         fd_close(fsp);
2309
2310                         return NT_STATUS_SHARING_VIOLATION;
2311                 }
2312         }
2313
2314         /*
2315          * At this point onwards, we can guarentee that the share entry
2316          * is locked, whether we created the file or not, and that the
2317          * deny mode is compatible with all current opens.
2318          */
2319
2320         /*
2321          * If requested, truncate the file.
2322          */
2323
2324         if (file_existed && (flags2&O_TRUNC)) {
2325                 /*
2326                  * We are modifing the file after open - update the stat
2327                  * struct..
2328                  */
2329                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2330                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2331                         status = map_nt_error_from_unix(errno);
2332                         TALLOC_FREE(lck);
2333                         fd_close(fsp);
2334                         return status;
2335                 }
2336         }
2337
2338         /*
2339          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2340          * but we don't have to store this - just ignore it on access check.
2341          */
2342         if (conn->sconn->using_smb2) {
2343                 /*
2344                  * SMB2 doesn't return it (according to Microsoft tests).
2345                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2346                  * File created with access = 0x7 (Read, Write, Delete)
2347                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2348                  */
2349                 fsp->access_mask = access_mask;
2350         } else {
2351                 /* But SMB1 does. */
2352                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2353         }
2354
2355         if (file_existed) {
2356                 /* stat opens on existing files don't get oplocks. */
2357                 if (is_stat_open(open_access_mask)) {
2358                         fsp->oplock_type = NO_OPLOCK;
2359                 }
2360
2361                 if (flags2 & O_TRUNC) {
2362                         info = FILE_WAS_OVERWRITTEN;
2363                 } else {
2364                         info = FILE_WAS_OPENED;
2365                 }
2366         } else {
2367                 info = FILE_WAS_CREATED;
2368         }
2369
2370         if (pinfo) {
2371                 *pinfo = info;
2372         }
2373
2374         /*
2375          * Setup the oplock info in both the shared memory and
2376          * file structs.
2377          */
2378
2379         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2380                 /*
2381                  * Could not get the kernel oplock or there are byte-range
2382                  * locks on the file.
2383                  */
2384                 fsp->oplock_type = NO_OPLOCK;
2385         }
2386
2387         set_share_mode(lck, fsp, get_current_uid(conn),
2388                         req ? req->mid : 0,
2389                        fsp->oplock_type);
2390
2391         /* Handle strange delete on close create semantics. */
2392         if (create_options & FILE_DELETE_ON_CLOSE) {
2393
2394                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2395
2396                 if (!NT_STATUS_IS_OK(status)) {
2397                         /* Remember to delete the mode we just added. */
2398                         del_share_mode(lck, fsp);
2399                         TALLOC_FREE(lck);
2400                         fd_close(fsp);
2401                         return status;
2402                 }
2403                 /* Note that here we set the *inital* delete on close flag,
2404                    not the regular one. The magic gets handled in close. */
2405                 fsp->initial_delete_on_close = True;
2406         }
2407
2408         if (info == FILE_WAS_OVERWRITTEN
2409             || info == FILE_WAS_CREATED
2410             || info == FILE_WAS_SUPERSEDED) {
2411                 new_file_created = True;
2412         }
2413
2414         if (new_file_created) {
2415                 /* Files should be initially set as archive */
2416                 if (lp_map_archive(SNUM(conn)) ||
2417                     lp_store_dos_attributes(SNUM(conn))) {
2418                         if (!posix_open) {
2419                                 if (file_set_dosmode(conn, smb_fname,
2420                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2421                                             parent_dir, true) == 0) {
2422                                         unx_mode = smb_fname->st.st_ex_mode;
2423                                 }
2424                         }
2425                 }
2426         }
2427
2428         /* Determine sparse flag. */
2429         if (posix_open) {
2430                 /* POSIX opens are sparse by default. */
2431                 fsp->is_sparse = true;
2432         } else {
2433                 fsp->is_sparse = (file_existed &&
2434                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2435         }
2436
2437         /*
2438          * Take care of inherited ACLs on created files - if default ACL not
2439          * selected.
2440          */
2441
2442         if (!posix_open && !file_existed && !def_acl) {
2443
2444                 int saved_errno = errno; /* We might get ENOSYS in the next
2445                                           * call.. */
2446
2447                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2448                     errno == ENOSYS) {
2449                         errno = saved_errno; /* Ignore ENOSYS */
2450                 }
2451
2452         } else if (new_unx_mode) {
2453
2454                 int ret = -1;
2455
2456                 /* Attributes need changing. File already existed. */
2457
2458                 {
2459                         int saved_errno = errno; /* We might get ENOSYS in the
2460                                                   * next call.. */
2461                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2462
2463                         if (ret == -1 && errno == ENOSYS) {
2464                                 errno = saved_errno; /* Ignore ENOSYS */
2465                         } else {
2466                                 DEBUG(5, ("open_file_ntcreate: reset "
2467                                           "attributes of file %s to 0%o\n",
2468                                           smb_fname_str_dbg(smb_fname),
2469                                           (unsigned int)new_unx_mode));
2470                                 ret = 0; /* Don't do the fchmod below. */
2471                         }
2472                 }
2473
2474                 if ((ret == -1) &&
2475                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2476                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2477                                   "attributes of file %s to 0%o\n",
2478                                   smb_fname_str_dbg(smb_fname),
2479                                   (unsigned int)new_unx_mode));
2480         }
2481
2482         /* If this is a successful open, we must remove any deferred open
2483          * records. */
2484         if (req != NULL) {
2485                 del_deferred_open_entry(lck, req->mid,
2486                                         messaging_server_id(req->sconn->msg_ctx));
2487         }
2488         TALLOC_FREE(lck);
2489
2490         return NT_STATUS_OK;
2491 }
2492
2493
2494 /****************************************************************************
2495  Open a file for for write to ensure that we can fchmod it.
2496 ****************************************************************************/
2497
2498 NTSTATUS open_file_fchmod(connection_struct *conn,
2499                           struct smb_filename *smb_fname,
2500                           files_struct **result)
2501 {
2502         if (!VALID_STAT(smb_fname->st)) {
2503                 return NT_STATUS_INVALID_PARAMETER;
2504         }
2505
2506         return SMB_VFS_CREATE_FILE(
2507                 conn,                                   /* conn */
2508                 NULL,                                   /* req */
2509                 0,                                      /* root_dir_fid */
2510                 smb_fname,                              /* fname */
2511                 FILE_WRITE_DATA,                        /* access_mask */
2512                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2513                     FILE_SHARE_DELETE),
2514                 FILE_OPEN,                              /* create_disposition*/
2515                 0,                                      /* create_options */
2516                 0,                                      /* file_attributes */
2517                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2518                 0,                                      /* allocation_size */
2519                 0,                                      /* private_flags */
2520                 NULL,                                   /* sd */
2521                 NULL,                                   /* ea_list */
2522                 result,                                 /* result */
2523                 NULL);                                  /* pinfo */
2524 }
2525
2526 static NTSTATUS mkdir_internal(connection_struct *conn,
2527                                struct smb_filename *smb_dname,
2528                                uint32 file_attributes)
2529 {
2530         mode_t mode;
2531         char *parent_dir = NULL;
2532         NTSTATUS status;
2533         bool posix_open = false;
2534         bool need_re_stat = false;
2535         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2536
2537         if(access_mask & ~(conn->share_access)) {
2538                 DEBUG(5,("mkdir_internal: failing share access "
2539                          "%s\n", lp_servicename(SNUM(conn))));
2540                 return NT_STATUS_ACCESS_DENIED;
2541         }
2542
2543         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2544                             NULL)) {
2545                 return NT_STATUS_NO_MEMORY;
2546         }
2547
2548         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2549                 posix_open = true;
2550                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2551         } else {
2552                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2553         }
2554
2555         status = check_parent_access(conn,
2556                                         smb_dname,
2557                                         access_mask,
2558                                         &parent_dir);
2559         if(!NT_STATUS_IS_OK(status)) {
2560                 DEBUG(5,("mkdir_internal: check_parent_access "
2561                         "on directory %s for path %s returned %s\n",
2562                         parent_dir,
2563                         smb_dname->base_name,
2564                         nt_errstr(status) ));
2565                 return status;
2566         }
2567
2568         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2569                 return map_nt_error_from_unix(errno);
2570         }
2571
2572         /* Ensure we're checking for a symlink here.... */
2573         /* We don't want to get caught by a symlink racer. */
2574
2575         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2576                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2577                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2578                 return map_nt_error_from_unix(errno);
2579         }
2580
2581         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2582                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2583                           smb_fname_str_dbg(smb_dname)));
2584                 return NT_STATUS_NOT_A_DIRECTORY;
2585         }
2586
2587         if (lp_store_dos_attributes(SNUM(conn))) {
2588                 if (!posix_open) {
2589                         file_set_dosmode(conn, smb_dname,
2590                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2591                                          parent_dir, true);
2592                 }
2593         }
2594
2595         if (lp_inherit_perms(SNUM(conn))) {
2596                 inherit_access_posix_acl(conn, parent_dir,
2597                                          smb_dname->base_name, mode);
2598                 need_re_stat = true;
2599         }
2600
2601         if (!posix_open) {
2602                 /*
2603                  * Check if high bits should have been set,
2604                  * then (if bits are missing): add them.
2605                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2606                  * dir.
2607                  */
2608                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2609                     (mode & ~smb_dname->st.st_ex_mode)) {
2610                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2611                                       (smb_dname->st.st_ex_mode |
2612                                           (mode & ~smb_dname->st.st_ex_mode)));
2613                         need_re_stat = true;
2614                 }
2615         }
2616
2617         /* Change the owner if required. */
2618         if (lp_inherit_owner(SNUM(conn))) {
2619                 change_dir_owner_to_parent(conn, parent_dir,
2620                                            smb_dname->base_name,
2621                                            &smb_dname->st);
2622                 need_re_stat = true;
2623         }
2624
2625         if (need_re_stat) {
2626                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2627                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2628                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2629                         return map_nt_error_from_unix(errno);
2630                 }
2631         }
2632
2633         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2634                      smb_dname->base_name);
2635
2636         return NT_STATUS_OK;
2637 }
2638
2639 /****************************************************************************
2640  Ensure we didn't get symlink raced on opening a directory.
2641 ****************************************************************************/
2642
2643 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2644                         const SMB_STRUCT_STAT *sbuf2)
2645 {
2646         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2647                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2648                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2649                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2650                 return false;
2651         }
2652         return true;
2653 }
2654
2655 /****************************************************************************
2656  Open a directory from an NT SMB call.
2657 ****************************************************************************/
2658
2659 static NTSTATUS open_directory(connection_struct *conn,
2660                                struct smb_request *req,
2661                                struct smb_filename *smb_dname,
2662                                uint32 access_mask,
2663                                uint32 share_access,
2664                                uint32 create_disposition,
2665                                uint32 create_options,
2666                                uint32 file_attributes,
2667                                int *pinfo,
2668                                files_struct **result)
2669 {
2670         files_struct *fsp = NULL;
2671         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2672         struct share_mode_lock *lck = NULL;
2673         NTSTATUS status;
2674         struct timespec mtimespec;
2675         int info = 0;
2676
2677         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2678
2679         /* Ensure we have a directory attribute. */
2680         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2681
2682         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2683                  "share_access = 0x%x create_options = 0x%x, "
2684                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2685                  smb_fname_str_dbg(smb_dname),
2686                  (unsigned int)access_mask,
2687                  (unsigned int)share_access,
2688                  (unsigned int)create_options,
2689                  (unsigned int)create_disposition,
2690                  (unsigned int)file_attributes));
2691
2692         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2693                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2694                         is_ntfs_stream_smb_fname(smb_dname)) {
2695                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2696                           smb_fname_str_dbg(smb_dname)));
2697                 return NT_STATUS_NOT_A_DIRECTORY;
2698         }
2699
2700         status = smbd_calculate_access_mask(conn, smb_dname,
2701                                             access_mask, &access_mask);
2702         if (!NT_STATUS_IS_OK(status)) {
2703                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2704                         "on file %s returned %s\n",
2705                         smb_fname_str_dbg(smb_dname),
2706                         nt_errstr(status)));
2707                 return status;
2708         }
2709
2710         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2711                         !security_token_has_privilege(get_current_nttok(conn),
2712                                         SEC_PRIV_SECURITY)) {
2713                 DEBUG(10, ("open_directory: open on %s "
2714                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2715                         smb_fname_str_dbg(smb_dname)));
2716                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2717         }
2718
2719         switch( create_disposition ) {
2720                 case FILE_OPEN:
2721
2722                         if (!dir_existed) {
2723                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2724                         }
2725
2726                         info = FILE_WAS_OPENED;
2727                         break;
2728
2729                 case FILE_CREATE:
2730
2731                         /* If directory exists error. If directory doesn't
2732                          * exist create. */
2733
2734                         if (dir_existed) {
2735                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2736                                 DEBUG(2, ("open_directory: unable to create "
2737                                           "%s. Error was %s\n",
2738                                           smb_fname_str_dbg(smb_dname),
2739                                           nt_errstr(status)));
2740                                 return status;
2741                         }
2742
2743                         status = mkdir_internal(conn, smb_dname,
2744                                                 file_attributes);
2745
2746                         if (!NT_STATUS_IS_OK(status)) {
2747                                 DEBUG(2, ("open_directory: unable to create "
2748                                           "%s. Error was %s\n",
2749                                           smb_fname_str_dbg(smb_dname),
2750                                           nt_errstr(status)));
2751                                 return status;
2752                         }
2753
2754                         info = FILE_WAS_CREATED;
2755                         break;
2756
2757                 case FILE_OPEN_IF:
2758                         /*
2759                          * If directory exists open. If directory doesn't
2760                          * exist create.
2761                          */
2762
2763                         if (dir_existed) {
2764                                 status = NT_STATUS_OK;
2765                                 info = FILE_WAS_OPENED;
2766                         } else {
2767                                 status = mkdir_internal(conn, smb_dname,
2768                                                 file_attributes);
2769
2770                                 if (NT_STATUS_IS_OK(status)) {
2771                                         info = FILE_WAS_CREATED;
2772                                 } else {
2773                                         /* Cope with create race. */
2774                                         if (!NT_STATUS_EQUAL(status,
2775                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2776                                                 DEBUG(2, ("open_directory: unable to create "
2777                                                         "%s. Error was %s\n",
2778                                                         smb_fname_str_dbg(smb_dname),
2779                                                         nt_errstr(status)));
2780                                                 return status;
2781                                         }
2782                                         info = FILE_WAS_OPENED;
2783                                 }
2784                         }
2785
2786                         break;
2787
2788                 case FILE_SUPERSEDE:
2789                 case FILE_OVERWRITE:
2790                 case FILE_OVERWRITE_IF:
2791                 default:
2792                         DEBUG(5,("open_directory: invalid create_disposition "
2793                                  "0x%x for directory %s\n",
2794                                  (unsigned int)create_disposition,
2795                                  smb_fname_str_dbg(smb_dname)));
2796                         return NT_STATUS_INVALID_PARAMETER;
2797         }
2798
2799         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2800                 DEBUG(5,("open_directory: %s is not a directory !\n",
2801                          smb_fname_str_dbg(smb_dname)));
2802                 return NT_STATUS_NOT_A_DIRECTORY;
2803         }
2804
2805         if (info == FILE_WAS_OPENED) {
2806                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2807                 if (!NT_STATUS_IS_OK(status)) {
2808                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2809                                 "file %s failed with %s\n",
2810                                 smb_fname_str_dbg(smb_dname),
2811                                 nt_errstr(status)));
2812                         return status;
2813                 }
2814         }
2815
2816         status = file_new(req, conn, &fsp);
2817         if(!NT_STATUS_IS_OK(status)) {
2818                 return status;
2819         }
2820
2821         /*
2822          * Setup the files_struct for it.
2823          */
2824
2825         fsp->mode = smb_dname->st.st_ex_mode;
2826         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2827         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2828         fsp->file_pid = req ? req->smbpid : 0;
2829         fsp->can_lock = False;
2830         fsp->can_read = False;
2831         fsp->can_write = False;
2832
2833         fsp->share_access = share_access;
2834         fsp->fh->private_options = 0;
2835         /*
2836          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2837          */
2838         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2839         fsp->print_file = NULL;
2840         fsp->modified = False;
2841         fsp->oplock_type = NO_OPLOCK;
2842         fsp->sent_oplock_break = NO_BREAK_SENT;
2843         fsp->is_directory = True;
2844         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2845         status = fsp_set_smb_fname(fsp, smb_dname);
2846         if (!NT_STATUS_IS_OK(status)) {
2847                 file_free(req, fsp);
2848                 return status;
2849         }
2850
2851         mtimespec = smb_dname->st.st_ex_mtime;
2852
2853 #ifdef O_DIRECTORY
2854         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2855 #else
2856         /* POSIX allows us to open a directory with O_RDONLY. */
2857         status = fd_open(conn, fsp, O_RDONLY, 0);
2858 #endif
2859         if (!NT_STATUS_IS_OK(status)) {
2860                 DEBUG(5, ("open_directory: Could not open fd for "
2861                         "%s (%s)\n",
2862                         smb_fname_str_dbg(smb_dname),
2863                         nt_errstr(status)));
2864                 file_free(req, fsp);
2865                 return status;
2866         }
2867
2868         status = vfs_stat_fsp(fsp);
2869         if (!NT_STATUS_IS_OK(status)) {
2870                 fd_close(fsp);
2871                 file_free(req, fsp);
2872                 return status;
2873         }
2874
2875         /* Ensure there was no race condition. */
2876         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2877                 DEBUG(5,("open_directory: stat struct differs for "
2878                         "directory %s.\n",
2879                         smb_fname_str_dbg(smb_dname)));
2880                 fd_close(fsp);
2881                 file_free(req, fsp);
2882                 return NT_STATUS_ACCESS_DENIED;
2883         }
2884
2885         lck = get_share_mode_lock_fresh(talloc_tos(), fsp->file_id,
2886                                         conn->connectpath, smb_dname,
2887                                         &mtimespec);
2888
2889         if (lck == NULL) {
2890                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2891                           "%s\n", smb_fname_str_dbg(smb_dname)));
2892                 fd_close(fsp);
2893                 file_free(req, fsp);
2894                 return NT_STATUS_SHARING_VIOLATION;
2895         }
2896
2897         status = open_mode_check(conn, lck, fsp->name_hash,
2898                                 access_mask, share_access,
2899                                  create_options, &dir_existed);
2900
2901         if (!NT_STATUS_IS_OK(status)) {
2902                 TALLOC_FREE(lck);
2903                 fd_close(fsp);
2904                 file_free(req, fsp);
2905                 return status;
2906         }
2907
2908         set_share_mode(lck, fsp, get_current_uid(conn),
2909                         req ? req->mid : 0, NO_OPLOCK);
2910
2911         /* For directories the delete on close bit at open time seems
2912            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2913         if (create_options & FILE_DELETE_ON_CLOSE) {
2914                 status = can_set_delete_on_close(fsp, 0);
2915                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2916                         TALLOC_FREE(lck);
2917                         fd_close(fsp);
2918                         file_free(req, fsp);
2919                         return status;
2920                 }
2921
2922                 if (NT_STATUS_IS_OK(status)) {
2923                         /* Note that here we set the *inital* delete on close flag,
2924                            not the regular one. The magic gets handled in close. */
2925                         fsp->initial_delete_on_close = True;
2926                 }
2927         }
2928
2929         TALLOC_FREE(lck);
2930
2931         if (pinfo) {
2932                 *pinfo = info;
2933         }
2934
2935         *result = fsp;
2936         return NT_STATUS_OK;
2937 }
2938
2939 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2940                           struct smb_filename *smb_dname)
2941 {
2942         NTSTATUS status;
2943         files_struct *fsp;
2944
2945         status = SMB_VFS_CREATE_FILE(
2946                 conn,                                   /* conn */
2947                 req,                                    /* req */
2948                 0,                                      /* root_dir_fid */
2949                 smb_dname,                              /* fname */
2950                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2951                 FILE_SHARE_NONE,                        /* share_access */
2952                 FILE_CREATE,                            /* create_disposition*/
2953                 FILE_DIRECTORY_FILE,                    /* create_options */
2954                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2955                 0,                                      /* oplock_request */
2956                 0,                                      /* allocation_size */
2957                 0,                                      /* private_flags */
2958                 NULL,                                   /* sd */
2959                 NULL,                                   /* ea_list */
2960                 &fsp,                                   /* result */
2961                 NULL);                                  /* pinfo */
2962
2963         if (NT_STATUS_IS_OK(status)) {
2964                 close_file(req, fsp, NORMAL_CLOSE);
2965         }
2966
2967         return status;
2968 }
2969
2970 /****************************************************************************
2971  Receive notification that one of our open files has been renamed by another
2972  smbd process.
2973 ****************************************************************************/
2974
2975 void msg_file_was_renamed(struct messaging_context *msg,
2976                           void *private_data,
2977                           uint32_t msg_type,
2978                           struct server_id server_id,
2979                           DATA_BLOB *data)
2980 {
2981         files_struct *fsp;
2982         char *frm = (char *)data->data;
2983         struct file_id id;
2984         const char *sharepath;
2985         const char *base_name;
2986         const char *stream_name;
2987         struct smb_filename *smb_fname = NULL;
2988         size_t sp_len, bn_len;
2989         NTSTATUS status;
2990         struct smbd_server_connection *sconn =
2991                 talloc_get_type_abort(private_data,
2992                 struct smbd_server_connection);
2993
2994         if (data->data == NULL
2995             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2996                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2997                           (int)data->length));
2998                 return;
2999         }
3000
3001         /* Unpack the message. */
3002         pull_file_id_24(frm, &id);
3003         sharepath = &frm[24];
3004         sp_len = strlen(sharepath);
3005         base_name = sharepath + sp_len + 1;
3006         bn_len = strlen(base_name);
3007         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3008
3009         /* stream_name must always be NULL if there is no stream. */
3010         if (stream_name[0] == '\0') {
3011                 stream_name = NULL;
3012         }
3013
3014         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3015                                             stream_name, NULL, &smb_fname);
3016         if (!NT_STATUS_IS_OK(status)) {
3017                 return;
3018         }
3019
3020         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3021                 "file_id %s\n",
3022                 sharepath, smb_fname_str_dbg(smb_fname),
3023                 file_id_string_tos(&id)));
3024
3025         for(fsp = file_find_di_first(sconn, id); fsp;
3026             fsp = file_find_di_next(fsp)) {
3027                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3028
3029                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3030                                 fsp->fnum, fsp_str_dbg(fsp),
3031                                 smb_fname_str_dbg(smb_fname)));
3032                         status = fsp_set_smb_fname(fsp, smb_fname);
3033                         if (!NT_STATUS_IS_OK(status)) {
3034                                 goto out;
3035                         }
3036                 } else {
3037                         /* TODO. JRA. */
3038                         /* Now we have the complete path we can work out if this is
3039                            actually within this share and adjust newname accordingly. */
3040                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3041                                 "not sharepath %s) "
3042                                 "fnum %d from %s -> %s\n",
3043                                 fsp->conn->connectpath,
3044                                 sharepath,
3045                                 fsp->fnum,
3046                                 fsp_str_dbg(fsp),
3047                                 smb_fname_str_dbg(smb_fname)));
3048                 }
3049         }
3050  out:
3051         TALLOC_FREE(smb_fname);
3052         return;
3053 }
3054
3055 /*
3056  * If a main file is opened for delete, all streams need to be checked for
3057  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3058  * If that works, delete them all by setting the delete on close and close.
3059  */
3060
3061 NTSTATUS open_streams_for_delete(connection_struct *conn,
3062                                         const char *fname)
3063 {
3064         struct stream_struct *stream_info = NULL;
3065         files_struct **streams = NULL;
3066         int i;
3067         unsigned int num_streams = 0;
3068         TALLOC_CTX *frame = talloc_stackframe();
3069         NTSTATUS status;
3070
3071         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3072                                 &num_streams, &stream_info);
3073
3074         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3075             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3076                 DEBUG(10, ("no streams around\n"));
3077                 TALLOC_FREE(frame);
3078                 return NT_STATUS_OK;
3079         }
3080
3081         if (!NT_STATUS_IS_OK(status)) {
3082                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3083                            nt_errstr(status)));
3084                 goto fail;
3085         }
3086
3087         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3088                    num_streams));
3089
3090         if (num_streams == 0) {
3091                 TALLOC_FREE(frame);
3092                 return NT_STATUS_OK;
3093         }
3094
3095         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3096         if (streams == NULL) {
3097                 DEBUG(0, ("talloc failed\n"));
3098                 status = NT_STATUS_NO_MEMORY;
3099                 goto fail;
3100         }
3101
3102         for (i=0; i<num_streams; i++) {
3103                 struct smb_filename *smb_fname = NULL;
3104
3105                 if (strequal(stream_info[i].name, "::$DATA")) {
3106                         streams[i] = NULL;
3107                         continue;
3108                 }
3109
3110                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3111                                                     stream_info[i].name,
3112                                                     NULL, &smb_fname);
3113                 if (!NT_STATUS_IS_OK(status)) {
3114                         goto fail;
3115                 }
3116
3117                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3118                         DEBUG(10, ("Unable to stat stream: %s\n",
3119                                    smb_fname_str_dbg(smb_fname)));
3120                 }
3121
3122                 status = SMB_VFS_CREATE_FILE(
3123                          conn,                  /* conn */
3124                          NULL,                  /* req */
3125                          0,                     /* root_dir_fid */
3126                          smb_fname,             /* fname */
3127                          DELETE_ACCESS,         /* access_mask */
3128                          (FILE_SHARE_READ |     /* share_access */
3129                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3130                          FILE_OPEN,             /* create_disposition*/
3131                          0,                     /* create_options */
3132                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3133                          0,                     /* oplock_request */
3134                          0,                     /* allocation_size */
3135                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3136                          NULL,                  /* sd */
3137                          NULL,                  /* ea_list */
3138                          &streams[i],           /* result */
3139                          NULL);                 /* pinfo */
3140
3141                 if (!NT_STATUS_IS_OK(status)) {
3142                         DEBUG(10, ("Could not open stream %s: %s\n",
3143                                    smb_fname_str_dbg(smb_fname),
3144                                    nt_errstr(status)));
3145
3146                         TALLOC_FREE(smb_fname);
3147                         break;
3148                 }
3149                 TALLOC_FREE(smb_fname);
3150         }
3151
3152         /*
3153          * don't touch the variable "status" beyond this point :-)
3154          */
3155
3156         for (i -= 1 ; i >= 0; i--) {
3157                 if (streams[i] == NULL) {
3158                         continue;
3159                 }
3160
3161                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3162                            fsp_str_dbg(streams[i])));
3163                 close_file(NULL, streams[i], NORMAL_CLOSE);
3164         }
3165
3166  fail:
3167         TALLOC_FREE(frame);
3168         return status;
3169 }
3170
3171 /*********************************************************************
3172  Create a default ACL by inheriting from the parent. If no inheritance
3173  from the parent available, don't set anything. This will leave the actual
3174  permissions the new file or directory already got from the filesystem
3175  as the NT ACL when read.
3176 *********************************************************************/
3177
3178 static NTSTATUS inherit_new_acl(files_struct *fsp)
3179 {
3180         TALLOC_CTX *ctx = talloc_tos();
3181         char *parent_name = NULL;
3182         struct security_descriptor *parent_desc = NULL;
3183         NTSTATUS status = NT_STATUS_OK;
3184         struct security_descriptor *psd = NULL;
3185         struct dom_sid *owner_sid = NULL;
3186         struct dom_sid *group_sid = NULL;
3187         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3188         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3189         bool inheritable_components = false;
3190         size_t size = 0;
3191
3192         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3193                 return NT_STATUS_NO_MEMORY;
3194         }
3195
3196         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3197                                 parent_name,
3198                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3199                                 &parent_desc);
3200         if (!NT_STATUS_IS_OK(status)) {
3201                 return status;
3202         }
3203
3204         inheritable_components = sd_has_inheritable_components(parent_desc,
3205                                         fsp->is_directory);
3206
3207         if (!inheritable_components && !inherit_owner) {
3208                 /* Nothing to inherit and not setting owner. */
3209                 return NT_STATUS_OK;
3210         }
3211
3212         /* Create an inherited descriptor from the parent. */
3213
3214         if (DEBUGLEVEL >= 10) {
3215                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3216                         fsp_str_dbg(fsp) ));
3217                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3218         }
3219
3220         /* Inherit from parent descriptor if "inherit owner" set. */
3221         if (inherit_owner) {
3222                 owner_sid = parent_desc->owner_sid;
3223                 group_sid = parent_desc->group_sid;
3224         }
3225
3226         if (owner_sid == NULL) {
3227                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3228         }
3229         if (group_sid == NULL) {
3230                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3231         }
3232
3233         status = se_create_child_secdesc(ctx,
3234                         &psd,
3235                         &size,
3236                         parent_desc,
3237                         owner_sid,
3238                         group_sid,
3239                         fsp->is_directory);
3240         if (!NT_STATUS_IS_OK(status)) {
3241                 return status;
3242         }
3243
3244         /* If inheritable_components == false,
3245            se_create_child_secdesc()
3246            creates a security desriptor with a NULL dacl
3247            entry, but with SEC_DESC_DACL_PRESENT. We need
3248            to remove that flag. */
3249
3250         if (!inheritable_components) {
3251                 security_info_sent &= ~SECINFO_DACL;
3252                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3253         }
3254
3255         if (DEBUGLEVEL >= 10) {
3256                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3257                         fsp_str_dbg(fsp) ));
3258                 NDR_PRINT_DEBUG(security_descriptor, psd);
3259         }
3260
3261         if (inherit_owner) {
3262                 /* We need to be root to force this. */
3263                 become_root();
3264         }
3265         status = SMB_VFS_FSET_NT_ACL(fsp,
3266                         security_info_sent,
3267                         psd);
3268         if (inherit_owner) {
3269                 unbecome_root();
3270         }
3271         return status;
3272 }
3273
3274 /*
3275  * Wrapper around open_file_ntcreate and open_directory
3276  */
3277
3278 static NTSTATUS create_file_unixpath(connection_struct *conn,
3279                                      struct smb_request *req,
3280                                      struct smb_filename *smb_fname,
3281                                      uint32_t access_mask,
3282                                      uint32_t share_access,
3283                                      uint32_t create_disposition,
3284                                      uint32_t create_options,
3285                                      uint32_t file_attributes,
3286                                      uint32_t oplock_request,
3287                                      uint64_t allocation_size,
3288                                      uint32_t private_flags,
3289                                      struct security_descriptor *sd,
3290                                      struct ea_list *ea_list,
3291
3292                                      files_struct **result,
3293                                      int *pinfo)
3294 {
3295         int info = FILE_WAS_OPENED;
3296         files_struct *base_fsp = NULL;
3297         files_struct *fsp = NULL;
3298         NTSTATUS status;
3299
3300         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3301                   "file_attributes = 0x%x, share_access = 0x%x, "
3302                   "create_disposition = 0x%x create_options = 0x%x "
3303                   "oplock_request = 0x%x private_flags = 0x%x "
3304                   "ea_list = 0x%p, sd = 0x%p, "
3305                   "fname = %s\n",
3306                   (unsigned int)access_mask,
3307                   (unsigned int)file_attributes,
3308                   (unsigned int)share_access,
3309                   (unsigned int)create_disposition,
3310                   (unsigned int)create_options,
3311                   (unsigned int)oplock_request,
3312                   (unsigned int)private_flags,
3313                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3314
3315         if (create_options & FILE_OPEN_BY_FILE_ID) {
3316                 status = NT_STATUS_NOT_SUPPORTED;
3317                 goto fail;
3318         }
3319
3320         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3321                 status = NT_STATUS_INVALID_PARAMETER;
3322                 goto fail;
3323         }
3324
3325         if (req == NULL) {
3326                 oplock_request |= INTERNAL_OPEN_ONLY;
3327         }
3328
3329         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3330             && (access_mask & DELETE_ACCESS)
3331             && !is_ntfs_stream_smb_fname(smb_fname)) {
3332                 /*
3333                  * We can't open a file with DELETE access if any of the
3334                  * streams is open without FILE_SHARE_DELETE
3335                  */
3336                 status = open_streams_for_delete(conn, smb_fname->base_name);
3337
3338                 if (!NT_STATUS_IS_OK(status)) {
3339                         goto fail;
3340                 }
3341         }
3342
3343         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3344                         !security_token_has_privilege(get_current_nttok(conn),
3345                                         SEC_PRIV_SECURITY)) {
3346                 DEBUG(10, ("create_file_unixpath: open on %s "
3347                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3348                         smb_fname_str_dbg(smb_fname)));
3349                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3350                 goto fail;
3351         }
3352
3353         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3354             && is_ntfs_stream_smb_fname(smb_fname)
3355             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3356                 uint32 base_create_disposition;
3357                 struct smb_filename *smb_fname_base = NULL;
3358
3359                 if (create_options & FILE_DIRECTORY_FILE) {
3360                         status = NT_STATUS_NOT_A_DIRECTORY;
3361                         goto fail;
3362                 }
3363
3364                 switch (create_disposition) {
3365                 case FILE_OPEN:
3366                         base_create_disposition = FILE_OPEN;
3367                         break;
3368                 default:
3369                         base_create_disposition = FILE_OPEN_IF;
3370                         break;
3371                 }
3372
3373                 /* Create an smb_filename with stream_name == NULL. */
3374                 status = create_synthetic_smb_fname(talloc_tos(),
3375                                                     smb_fname->base_name,
3376                                                     NULL, NULL,
3377                                                     &smb_fname_base);
3378                 if (!NT_STATUS_IS_OK(status)) {
3379                         goto fail;
3380                 }
3381
3382                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3383                         DEBUG(10, ("Unable to stat stream: %s\n",
3384                                    smb_fname_str_dbg(smb_fname_base)));
3385                 }
3386
3387                 /* Open the base file. */
3388                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3389                                               FILE_SHARE_READ
3390                                               | FILE_SHARE_WRITE
3391                                               | FILE_SHARE_DELETE,
3392                                               base_create_disposition,
3393                                               0, 0, 0, 0, 0, NULL, NULL,
3394                                               &base_fsp, NULL);
3395                 TALLOC_FREE(smb_fname_base);
3396
3397                 if (!NT_STATUS_IS_OK(status)) {
3398                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3399                                    "%s\n", smb_fname->base_name,
3400                                    nt_errstr(status)));
3401                         goto fail;
3402                 }
3403                 /* we don't need to low level fd */
3404                 fd_close(base_fsp);
3405         }
3406
3407         /*
3408          * If it's a request for a directory open, deal with it separately.
3409          */
3410
3411         if (create_options & FILE_DIRECTORY_FILE) {
3412
3413                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3414                         status = NT_STATUS_INVALID_PARAMETER;
3415                         goto fail;
3416                 }
3417
3418                 /* Can't open a temp directory. IFS kit test. */
3419                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3420                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3421                         status = NT_STATUS_INVALID_PARAMETER;
3422                         goto fail;
3423                 }
3424
3425                 /*
3426                  * We will get a create directory here if the Win32
3427                  * app specified a security descriptor in the
3428                  * CreateDirectory() call.
3429                  */
3430
3431                 oplock_request = 0;
3432                 status = open_directory(
3433                         conn, req, smb_fname, access_mask, share_access,
3434                         create_disposition, create_options, file_attributes,
3435                         &info, &fsp);
3436         } else {
3437
3438                 /*
3439                  * Ordinary file case.
3440                  */
3441
3442                 status = file_new(req, conn, &fsp);
3443                 if(!NT_STATUS_IS_OK(status)) {
3444                         goto fail;
3445                 }
3446
3447                 status = fsp_set_smb_fname(fsp, smb_fname);
3448                 if (!NT_STATUS_IS_OK(status)) {
3449                         goto fail;
3450                 }
3451
3452                 /*
3453                  * We're opening the stream element of a base_fsp
3454                  * we already opened. Set up the base_fsp pointer.
3455                  */
3456                 if (base_fsp) {
3457                         fsp->base_fsp = base_fsp;
3458                 }
3459
3460                 status = open_file_ntcreate(conn,
3461                                             req,
3462                                             access_mask,
3463                                             share_access,
3464                                             create_disposition,
3465                                             create_options,
3466                                             file_attributes,
3467                                             oplock_request,
3468                                             private_flags,
3469                                             &info,
3470                                             fsp);
3471
3472                 if(!NT_STATUS_IS_OK(status)) {
3473                         file_free(req, fsp);
3474                         fsp = NULL;
3475                 }
3476
3477                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3478
3479                         /* A stream open never opens a directory */
3480
3481                         if (base_fsp) {
3482                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3483                                 goto fail;
3484                         }
3485
3486                         /*
3487                          * Fail the open if it was explicitly a non-directory
3488                          * file.
3489                          */
3490
3491                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3492                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3493                                 goto fail;
3494                         }
3495
3496                         oplock_request = 0;
3497                         status = open_directory(
3498                                 conn, req, smb_fname, access_mask,
3499                                 share_access, create_disposition,
3500                                 create_options, file_attributes,
3501                                 &info, &fsp);
3502                 }
3503         }
3504
3505         if (!NT_STATUS_IS_OK(status)) {
3506                 goto fail;
3507         }
3508
3509         fsp->base_fsp = base_fsp;
3510
3511         if ((ea_list != NULL) &&
3512             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3513                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3514                 if (!NT_STATUS_IS_OK(status)) {
3515                         goto fail;
3516                 }
3517         }
3518
3519         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3520                 status = NT_STATUS_ACCESS_DENIED;
3521                 goto fail;
3522         }
3523
3524         /* Save the requested allocation size. */
3525         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3526                 if (allocation_size
3527                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3528                         fsp->initial_allocation_size = smb_roundup(
3529                                 fsp->conn, allocation_size);
3530                         if (fsp->is_directory) {
3531                                 /* Can't set allocation size on a directory. */
3532                                 status = NT_STATUS_ACCESS_DENIED;
3533                                 goto fail;
3534                         }
3535                         if (vfs_allocate_file_space(
3536                                     fsp, fsp->initial_allocation_size) == -1) {
3537                                 status = NT_STATUS_DISK_FULL;
3538                                 goto fail;
3539                         }
3540                 } else {
3541                         fsp->initial_allocation_size = smb_roundup(
3542                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3543                 }
3544         }
3545
3546         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3547                                 fsp->base_fsp == NULL) {
3548                 if (sd != NULL) {
3549                         /*
3550                          * According to the MS documentation, the only time the security
3551                          * descriptor is applied to the opened file is iff we *created* the
3552                          * file; an existing file stays the same.
3553                          *
3554                          * Also, it seems (from observation) that you can open the file with
3555                          * any access mask but you can still write the sd. We need to override
3556                          * the granted access before we call set_sd
3557                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3558                          */
3559
3560                         uint32_t sec_info_sent;
3561                         uint32_t saved_access_mask = fsp->access_mask;
3562
3563                         sec_info_sent = get_sec_info(sd);
3564
3565                         fsp->access_mask = FILE_GENERIC_ALL;
3566
3567                         /* Convert all the generic bits. */
3568                         security_acl_map_generic(sd->dacl, &file_generic_mapping);
3569                         security_acl_map_generic(sd->sacl, &file_generic_mapping);
3570
3571                         if (sec_info_sent & (SECINFO_OWNER|
3572                                                 SECINFO_GROUP|
3573                                                 SECINFO_DACL|
3574                                                 SECINFO_SACL)) {
3575                                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3576                         }
3577
3578                         fsp->access_mask = saved_access_mask;
3579
3580                         if (!NT_STATUS_IS_OK(status)) {
3581                                 goto fail;
3582                         }
3583                 } else if (lp_inherit_acls(SNUM(conn))) {
3584                         /* Inherit from parent. Errors here are not fatal. */
3585                         status = inherit_new_acl(fsp);
3586                         if (!NT_STATUS_IS_OK(status)) {
3587                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3588                                         fsp_str_dbg(fsp),
3589                                         nt_errstr(status) ));
3590                         }
3591                 }
3592         }
3593
3594         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3595
3596         *result = fsp;
3597         if (pinfo != NULL) {
3598                 *pinfo = info;
3599         }
3600
3601         smb_fname->st = fsp->fsp_name->st;
3602
3603         return NT_STATUS_OK;
3604
3605  fail:
3606         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3607
3608         if (fsp != NULL) {
3609                 if (base_fsp && fsp->base_fsp == base_fsp) {
3610                         /*
3611                          * The close_file below will close
3612                          * fsp->base_fsp.
3613                          */
3614                         base_fsp = NULL;
3615                 }
3616                 close_file(req, fsp, ERROR_CLOSE);
3617                 fsp = NULL;
3618         }
3619         if (base_fsp != NULL) {
3620                 close_file(req, base_fsp, ERROR_CLOSE);
3621                 base_fsp = NULL;
3622         }
3623         return status;
3624 }
3625
3626 /*
3627  * Calculate the full path name given a relative fid.
3628  */
3629 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3630                                    struct smb_request *req,
3631                                    uint16_t root_dir_fid,
3632                                    const struct smb_filename *smb_fname,
3633                                    struct smb_filename **smb_fname_out)
3634 {
3635         files_struct *dir_fsp;
3636         char *parent_fname = NULL;
3637         char *new_base_name = NULL;
3638         NTSTATUS status;
3639
3640         if (root_dir_fid == 0 || !smb_fname) {
3641                 status = NT_STATUS_INTERNAL_ERROR;
3642                 goto out;
3643         }
3644
3645         dir_fsp = file_fsp(req, root_dir_fid);
3646
3647         if (dir_fsp == NULL) {
3648                 status = NT_STATUS_INVALID_HANDLE;
3649                 goto out;
3650         }
3651
3652         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3653                 status = NT_STATUS_INVALID_HANDLE;
3654                 goto out;
3655         }
3656
3657         if (!dir_fsp->is_directory) {
3658
3659                 /*
3660                  * Check to see if this is a mac fork of some kind.
3661                  */
3662
3663                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3664                     is_ntfs_stream_smb_fname(smb_fname)) {
3665                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3666                         goto out;
3667                 }
3668
3669                 /*
3670                   we need to handle the case when we get a
3671                   relative open relative to a file and the
3672                   pathname is blank - this is a reopen!
3673                   (hint from demyn plantenberg)
3674                 */
3675
3676                 status = NT_STATUS_INVALID_HANDLE;
3677                 goto out;
3678         }
3679
3680         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3681                 /*
3682                  * We're at the toplevel dir, the final file name
3683                  * must not contain ./, as this is filtered out
3684                  * normally by srvstr_get_path and unix_convert
3685                  * explicitly rejects paths containing ./.
3686                  */
3687                 parent_fname = talloc_strdup(talloc_tos(), "");
3688                 if (parent_fname == NULL) {
3689                         status = NT_STATUS_NO_MEMORY;
3690                         goto out;
3691                 }
3692         } else {
3693                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3694
3695                 /*
3696                  * Copy in the base directory name.
3697                  */
3698
3699                 parent_fname = talloc_array(talloc_tos(), char,
3700                     dir_name_len+2);
3701                 if (parent_fname == NULL) {
3702                         status = NT_STATUS_NO_MEMORY;
3703                         goto out;
3704                 }
3705                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3706                     dir_name_len+1);
3707
3708                 /*
3709                  * Ensure it ends in a '/'.
3710                  * We used TALLOC_SIZE +2 to add space for the '/'.
3711                  */
3712
3713                 if(dir_name_len
3714                     && (parent_fname[dir_name_len-1] != '\\')
3715                     && (parent_fname[dir_name_len-1] != '/')) {
3716                         parent_fname[dir_name_len] = '/';
3717                         parent_fname[dir_name_len+1] = '\0';
3718                 }
3719         }
3720
3721         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3722                                         smb_fname->base_name);
3723         if (new_base_name == NULL) {
3724                 status = NT_STATUS_NO_MEMORY;
3725                 goto out;
3726         }
3727
3728         status = filename_convert(req,
3729                                 conn,
3730                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3731                                 new_base_name,
3732                                 0,
3733                                 NULL,
3734                                 smb_fname_out);
3735         if (!NT_STATUS_IS_OK(status)) {
3736                 goto out;
3737         }
3738
3739  out:
3740         TALLOC_FREE(parent_fname);
3741         TALLOC_FREE(new_base_name);
3742         return status;
3743 }
3744
3745 NTSTATUS create_file_default(connection_struct *conn,
3746                              struct smb_request *req,
3747                              uint16_t root_dir_fid,
3748                              struct smb_filename *smb_fname,
3749                              uint32_t access_mask,
3750                              uint32_t share_access,
3751                              uint32_t create_disposition,
3752                              uint32_t create_options,
3753                              uint32_t file_attributes,
3754                              uint32_t oplock_request,
3755                              uint64_t allocation_size,
3756                              uint32_t private_flags,
3757                              struct security_descriptor *sd,
3758                              struct ea_list *ea_list,
3759                              files_struct **result,
3760                              int *pinfo)
3761 {
3762         int info = FILE_WAS_OPENED;
3763         files_struct *fsp = NULL;
3764         NTSTATUS status;
3765         bool stream_name = false;
3766
3767         DEBUG(10,("create_file: access_mask = 0x%x "
3768                   "file_attributes = 0x%x, share_access = 0x%x, "
3769                   "create_disposition = 0x%x create_options = 0x%x "
3770                   "oplock_request = 0x%x "
3771                   "private_flags = 0x%x "
3772                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3773                   "fname = %s\n",
3774                   (unsigned int)access_mask,
3775                   (unsigned int)file_attributes,
3776                   (unsigned int)share_access,
3777                   (unsigned int)create_disposition,
3778                   (unsigned int)create_options,
3779                   (unsigned int)oplock_request,
3780                   (unsigned int)private_flags,
3781                   (unsigned int)root_dir_fid,
3782                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3783
3784         /*
3785          * Calculate the filename from the root_dir_if if necessary.
3786          */
3787
3788         if (root_dir_fid != 0) {
3789                 struct smb_filename *smb_fname_out = NULL;
3790                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3791                                                    smb_fname, &smb_fname_out);
3792                 if (!NT_STATUS_IS_OK(status)) {
3793                         goto fail;
3794                 }
3795                 smb_fname = smb_fname_out;
3796         }
3797
3798         /*
3799          * Check to see if this is a mac fork of some kind.
3800          */
3801
3802         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3803         if (stream_name) {
3804                 enum FAKE_FILE_TYPE fake_file_type;
3805
3806                 fake_file_type = is_fake_file(smb_fname);
3807
3808                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3809
3810                         /*
3811                          * Here we go! support for changing the disk quotas
3812                          * --metze
3813                          *
3814                          * We need to fake up to open this MAGIC QUOTA file
3815                          * and return a valid FID.
3816                          *
3817                          * w2k close this file directly after openening xp
3818                          * also tries a QUERY_FILE_INFO on the file and then
3819                          * close it
3820                          */
3821                         status = open_fake_file(req, conn, req->vuid,
3822                                                 fake_file_type, smb_fname,
3823                                                 access_mask, &fsp);
3824                         if (!NT_STATUS_IS_OK(status)) {
3825                                 goto fail;
3826                         }
3827
3828                         ZERO_STRUCT(smb_fname->st);
3829                         goto done;
3830                 }
3831
3832                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3833                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3834                         goto fail;
3835                 }
3836         }
3837
3838         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3839                 int ret;
3840                 smb_fname->stream_name = NULL;
3841                 /* We have to handle this error here. */
3842                 if (create_options & FILE_DIRECTORY_FILE) {
3843                         status = NT_STATUS_NOT_A_DIRECTORY;
3844                         goto fail;
3845                 }
3846                 if (lp_posix_pathnames()) {
3847                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3848                 } else {
3849                         ret = SMB_VFS_STAT(conn, smb_fname);
3850                 }
3851
3852                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3853                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3854                         goto fail;
3855                 }
3856         }
3857
3858         status = create_file_unixpath(
3859                 conn, req, smb_fname, access_mask, share_access,
3860                 create_disposition, create_options, file_attributes,
3861                 oplock_request, allocation_size, private_flags,
3862                 sd, ea_list,
3863                 &fsp, &info);
3864
3865         if (!NT_STATUS_IS_OK(status)) {
3866                 goto fail;
3867         }
3868
3869  done:
3870         DEBUG(10, ("create_file: info=%d\n", info));
3871
3872         *result = fsp;
3873         if (pinfo != NULL) {
3874                 *pinfo = info;
3875         }
3876         return NT_STATUS_OK;
3877
3878  fail:
3879         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3880
3881         if (fsp != NULL) {
3882                 close_file(req, fsp, ERROR_CLOSE);
3883                 fsp = NULL;
3884         }
3885         return status;
3886 }