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_store_dos_attributes(SNUM(conn)) &&
 168                         (lp_map_readonly(SNUM(conn)) ||
 169                         lp_map_archive(SNUM(conn)) ||
 170                         lp_map_hidden(SNUM(conn)) ||
 171                         lp_map_system(SNUM(conn)))) {
 172                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 173
 174                 DEBUG(10,("smbd_check_access_rights: "
 175                         "overrode "
 176                         "FILE_WRITE_ATTRIBUTES "
 177                         "on file %s\n",
 178                         smb_fname_str_dbg(smb_fname)));
 179         }
 180
 181         if (parent_override_delete(conn,
 182                                 smb_fname,
 183                                 access_mask,
 184                                 rejected_mask)) {
 185                 /* Were we trying to do an open
 186                  * for delete and didn't get DELETE
 187                  * access (only) ? Check if the
 188                  * directory allows DELETE_CHILD.
 189                  * See here:
 190                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 191                  * for details. */
 192
 193                 rejected_mask &= ~DELETE_ACCESS;
 194
 195                 DEBUG(10,("smbd_check_access_rights: "
 196                         "overrode "
 197                         "DELETE_ACCESS on "
 198                         "file %s\n",
 199                         smb_fname_str_dbg(smb_fname)));
 200         }
 201
 202         if (rejected_mask != 0) {
 203                 return NT_STATUS_ACCESS_DENIED;
 204         } else {
 205                 return NT_STATUS_OK;
 206         }
 207 }
 208
 209 static NTSTATUS check_parent_access(struct connection_struct *conn,
 210                                 struct smb_filename *smb_fname,
 211                                 uint32_t access_mask,
 212                                 char **pp_parent_dir)
 213 {
 214         NTSTATUS status;
 215         char *parent_dir = NULL;
 216         struct security_descriptor *parent_sd = NULL;
 217         uint32_t access_granted = 0;
 218
 219         if (!parent_dirname(talloc_tos(),
 220                                 smb_fname->base_name,
 221                                 &parent_dir,
 222                                 NULL)) {
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225
 226         if (pp_parent_dir) {
 227                 *pp_parent_dir = parent_dir;
 228         }
 229
 230         if (get_current_uid(conn) == (uid_t)0) {
 231                 /* I'm sorry sir, I didn't know you were root... */
 232                 DEBUG(10,("check_parent_access: root override "
 233                         "on %s. Granting 0x%x\n",
 234                         smb_fname_str_dbg(smb_fname),
 235                         (unsigned int)access_mask ));
 236                 return NT_STATUS_OK;
 237         }
 238
 239         status = SMB_VFS_GET_NT_ACL(conn,
 240                                 parent_dir,
 241                                 SECINFO_DACL,
 242                                 &parent_sd);
 243
 244         if (!NT_STATUS_IS_OK(status)) {
 245                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 246                         "%s with error %s\n",
 247                         parent_dir,
 248                         nt_errstr(status)));
 249                 return status;
 250         }
 251
 252         /*
 253          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 254          * owner WRITE_DAC and READ_CONTROL.
 255          */
 256         status = se_access_check(parent_sd,
 257                                 get_current_nttok(conn),
 258                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 259                                 &access_granted);
 260         if(!NT_STATUS_IS_OK(status)) {
 261                 DEBUG(5,("check_parent_access: access check "
 262                         "on directory %s for "
 263                         "path %s for mask 0x%x returned (0x%x) %s\n",
 264                         parent_dir,
 265                         smb_fname->base_name,
 266                         access_mask,
 267                         access_granted,
 268                         nt_errstr(status) ));
 269                 return status;
 270         }
 271
 272         return NT_STATUS_OK;
 273 }
 274
 275 /****************************************************************************
 276  fd support routines - attempt to do a dos_open.
 277 ****************************************************************************/
 278
 279 static NTSTATUS fd_open(struct connection_struct *conn,
 280                     files_struct *fsp,
 281                     int flags,
 282                     mode_t mode)
 283 {
 284         struct smb_filename *smb_fname = fsp->fsp_name;
 285         NTSTATUS status = NT_STATUS_OK;
 286
 287 #ifdef O_NOFOLLOW
 288         /*
 289          * Never follow symlinks on a POSIX client. The
 290          * client should be doing this.
 291          */
 292
 293         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 294                 flags |= O_NOFOLLOW;
 295         }
 296 #endif
 297
 298         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 299         if (fsp->fh->fd == -1) {
 300                 status = map_nt_error_from_unix(errno);
 301                 if (errno == EMFILE) {
 302                         static time_t last_warned = 0L;
 303
 304                         if (time((time_t *) NULL) > last_warned) {
 305                                 DEBUG(0,("Too many open files, unable "
 306                                         "to open more!  smbd's max "
 307                                         "open files = %d\n",
 308                                         lp_max_open_files()));
 309                                 last_warned = time((time_t *) NULL);
 310                         }
 311                 }
 312
 313         }
 314
 315         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 316                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 317                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 318
 319         return status;
 320 }
 321
 322 /****************************************************************************
 323  Close the file associated with a fsp.
 324 ****************************************************************************/
 325
 326 NTSTATUS fd_close(files_struct *fsp)
 327 {
 328         int ret;
 329
 330         if (fsp->dptr) {
 331                 dptr_CloseDir(fsp);
 332         }
 333         if (fsp->fh->fd == -1) {
 334                 return NT_STATUS_OK; /* What we used to call a stat open. */
 335         }
 336         if (fsp->fh->ref_count > 1) {
 337                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 338         }
 339
 340         ret = SMB_VFS_CLOSE(fsp);
 341         fsp->fh->fd = -1;
 342         if (ret == -1) {
 343                 return map_nt_error_from_unix(errno);
 344         }
 345         return NT_STATUS_OK;
 346 }
 347
 348 /****************************************************************************
 349  Change the ownership of a file to that of the parent directory.
 350  Do this by fd if possible.
 351 ****************************************************************************/
 352
 353 void change_file_owner_to_parent(connection_struct *conn,
 354                                         const char *inherit_from_dir,
 355                                         files_struct *fsp)
 356 {
 357         struct smb_filename *smb_fname_parent = NULL;
 358         NTSTATUS status;
 359         int ret;
 360
 361         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 362                                             NULL, NULL, &smb_fname_parent);
 363         if (!NT_STATUS_IS_OK(status)) {
 364                 return;
 365         }
 366
 367         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 368         if (ret == -1) {
 369                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 370                          "directory %s. Error was %s\n",
 371                          smb_fname_str_dbg(smb_fname_parent),
 372                          strerror(errno)));
 373                 TALLOC_FREE(smb_fname_parent);
 374                 return;
 375         }
 376
 377         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 378                 /* Already this uid - no need to change. */
 379                 DEBUG(10,("change_file_owner_to_parent: file %s "
 380                         "is already owned by uid %d\n",
 381                         fsp_str_dbg(fsp),
 382                         (int)fsp->fsp_name->st.st_ex_uid ));
 383                 TALLOC_FREE(smb_fname_parent);
 384                 return;
 385         }
 386
 387         become_root();
 388         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 389         unbecome_root();
 390         if (ret == -1) {
 391                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 392                          "file %s to parent directory uid %u. Error "
 393                          "was %s\n", fsp_str_dbg(fsp),
 394                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 395                          strerror(errno) ));
 396         } else {
 397                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 398                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 399                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 400                 /* Ensure the uid entry is updated. */
 401                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 402         }
 403
 404         TALLOC_FREE(smb_fname_parent);
 405 }
 406
 407 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 408                                        const char *inherit_from_dir,
 409                                        const char *fname,
 410                                        SMB_STRUCT_STAT *psbuf)
 411 {
 412         struct smb_filename *smb_fname_parent = NULL;
 413         struct smb_filename *smb_fname_cwd = NULL;
 414         char *saved_dir = NULL;
 415         TALLOC_CTX *ctx = talloc_tos();
 416         NTSTATUS status = NT_STATUS_OK;
 417         int ret;
 418
 419         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 420                                             &smb_fname_parent);
 421         if (!NT_STATUS_IS_OK(status)) {
 422                 return status;
 423         }
 424
 425         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 426         if (ret == -1) {
 427                 status = map_nt_error_from_unix(errno);
 428                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 429                          "directory %s. Error was %s\n",
 430                          smb_fname_str_dbg(smb_fname_parent),
 431                          strerror(errno)));
 432                 goto out;
 433         }
 434
 435         /* We've already done an lstat into psbuf, and we know it's a
 436            directory. If we can cd into the directory and the dev/ino
 437            are the same then we can safely chown without races as
 438            we're locking the directory in place by being in it.  This
 439            should work on any UNIX (thanks tridge :-). JRA.
 440         */
 441
 442         saved_dir = vfs_GetWd(ctx,conn);
 443         if (!saved_dir) {
 444                 status = map_nt_error_from_unix(errno);
 445                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 446                          "current working directory. Error was %s\n",
 447                          strerror(errno)));
 448                 goto out;
 449         }
 450
 451         /* Chdir into the new path. */
 452         if (vfs_ChDir(conn, fname) == -1) {
 453                 status = map_nt_error_from_unix(errno);
 454                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 455                          "current working directory to %s. Error "
 456                          "was %s\n", fname, strerror(errno) ));
 457                 goto chdir;
 458         }
 459
 460         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 461                                             &smb_fname_cwd);
 462         if (!NT_STATUS_IS_OK(status)) {
 463                 return status;
 464         }
 465
 466         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 467         if (ret == -1) {
 468                 status = map_nt_error_from_unix(errno);
 469                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 470                          "directory '.' (%s) Error was %s\n",
 471                          fname, strerror(errno)));
 472                 goto chdir;
 473         }
 474
 475         /* Ensure we're pointing at the same place. */
 476         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 477             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 478                 DEBUG(0,("change_dir_owner_to_parent: "
 479                          "device/inode on directory %s changed. "
 480                          "Refusing to chown !\n", fname ));
 481                 status = NT_STATUS_ACCESS_DENIED;
 482                 goto chdir;
 483         }
 484
 485         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 486                 /* Already this uid - no need to change. */
 487                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 488                         "is already owned by uid %d\n",
 489                         fname,
 490                         (int)smb_fname_cwd->st.st_ex_uid ));
 491                 status = NT_STATUS_OK;
 492                 goto chdir;
 493         }
 494
 495         become_root();
 496         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 497                             (gid_t)-1);
 498         unbecome_root();
 499         if (ret == -1) {
 500                 status = map_nt_error_from_unix(errno);
 501                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 502                           "directory %s to parent directory uid %u. "
 503                           "Error was %s\n", fname,
 504                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 505                           strerror(errno) ));
 506         } else {
 507                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 508                         "directory %s to parent directory uid %u.\n",
 509                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 510                 /* Ensure the uid entry is updated. */
 511                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 512         }
 513
 514  chdir:
 515         vfs_ChDir(conn,saved_dir);
 516  out:
 517         TALLOC_FREE(smb_fname_parent);
 518         TALLOC_FREE(smb_fname_cwd);
 519         return status;
 520 }
 521
 522 /****************************************************************************
 523  Open a file.
 524 ****************************************************************************/
 525
 526 static NTSTATUS open_file(files_struct *fsp,
 527                           connection_struct *conn,
 528                           struct smb_request *req,
 529                           const char *parent_dir,
 530                           int flags,
 531                           mode_t unx_mode,
 532                           uint32 access_mask, /* client requested access mask. */
 533                           uint32 open_access_mask) /* what we're actually using in the open. */
 534 {
 535         struct smb_filename *smb_fname = fsp->fsp_name;
 536         NTSTATUS status = NT_STATUS_OK;
 537         int accmode = (flags & O_ACCMODE);
 538         int local_flags = flags;
 539         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 540         bool file_created = false;
 541
 542         fsp->fh->fd = -1;
 543         errno = EPERM;
 544
 545         /* Check permissions */
 546
 547         /*
 548          * This code was changed after seeing a client open request
 549          * containing the open mode of (DENY_WRITE/read-only) with
 550          * the 'create if not exist' bit set. The previous code
 551          * would fail to open the file read only on a read-only share
 552          * as it was checking the flags parameter  directly against O_RDONLY,
 553          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 554          * JRA.
 555          */
 556
 557         if (!CAN_WRITE(conn)) {
 558                 /* It's a read-only share - fail if we wanted to write. */
 559                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 560                         DEBUG(3,("Permission denied opening %s\n",
 561                                  smb_fname_str_dbg(smb_fname)));
 562                         return NT_STATUS_ACCESS_DENIED;
 563                 } else if(flags & O_CREAT) {
 564                         /* We don't want to write - but we must make sure that
 565                            O_CREAT doesn't create the file if we have write
 566                            access into the directory.
 567                         */
 568                         flags &= ~(O_CREAT|O_EXCL);
 569                         local_flags &= ~(O_CREAT|O_EXCL);
 570                 }
 571         }
 572
 573         /*
 574          * This little piece of insanity is inspired by the
 575          * fact that an NT client can open a file for O_RDONLY,
 576          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 577          * If the client *can* write to the file, then it expects to
 578          * truncate the file, even though it is opening for readonly.
 579          * Quicken uses this stupid trick in backup file creation...
 580          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 581          * for helping track this one down. It didn't bite us in 2.0.x
 582          * as we always opened files read-write in that release. JRA.
 583          */
 584
 585         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 586                 DEBUG(10,("open_file: truncate requested on read-only open "
 587                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 588                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 589         }
 590
 591         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 592             (!file_existed && (local_flags & O_CREAT)) ||
 593             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 594                 const char *wild;
 595
 596                 /*
 597                  * We can't actually truncate here as the file may be locked.
 598                  * open_file_ntcreate will take care of the truncate later. JRA.
 599                  */
 600
 601                 local_flags &= ~O_TRUNC;
 602
 603 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 604                 /*
 605                  * We would block on opening a FIFO with no one else on the
 606                  * other end. Do what we used to do and add O_NONBLOCK to the
 607                  * open flags. JRA.
 608                  */
 609
 610                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 611                         local_flags |= O_NONBLOCK;
 612                 }
 613 #endif
 614
 615                 /* Don't create files with Microsoft wildcard characters. */
 616                 if (fsp->base_fsp) {
 617                         /*
 618                          * wildcard characters are allowed in stream names
 619                          * only test the basefilename
 620                          */
 621                         wild = fsp->base_fsp->fsp_name->base_name;
 622                 } else {
 623                         wild = smb_fname->base_name;
 624                 }
 625                 if ((local_flags & O_CREAT) && !file_existed &&
 626                     ms_has_wild(wild))  {
 627                         return NT_STATUS_OBJECT_NAME_INVALID;
 628                 }
 629
 630                 /* Can we access this file ? */
 631                 if (!fsp->base_fsp) {
 632                         /* Only do this check on non-stream open. */
 633                         if (file_existed) {
 634                                 status = smbd_check_access_rights(conn,
 635                                                 smb_fname,
 636                                                 access_mask);
 637                         } else if (local_flags & O_CREAT){
 638                                 status = check_parent_access(conn,
 639                                                 smb_fname,
 640                                                 SEC_DIR_ADD_FILE,
 641                                                 NULL);
 642                         } else {
 643                                 /* File didn't exist and no O_CREAT. */
 644                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 645                         }
 646                         if (!NT_STATUS_IS_OK(status)) {
 647                                 DEBUG(10,("open_file: "
 648                                         "%s on file "
 649                                         "%s returned %s\n",
 650                                         file_existed ?
 651                                                 "smbd_check_access_rights" :
 652                                                 "check_parent_access",
 653                                         smb_fname_str_dbg(smb_fname),
 654                                         nt_errstr(status) ));
 655                                 return status;
 656                         }
 657                 }
 658
 659                 /* Actually do the open */
 660                 status = fd_open(conn, fsp, local_flags, unx_mode);
 661                 if (!NT_STATUS_IS_OK(status)) {
 662                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 663                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 664                                  nt_errstr(status),local_flags,flags));
 665                         return status;
 666                 }
 667
 668                 if ((local_flags & O_CREAT) && !file_existed) {
 669                         file_created = true;
 670                 }
 671
 672         } else {
 673                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 674                 if (!file_existed) {
 675                         /* File must exist for a stat open. */
 676                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 677                 }
 678
 679                 status = smbd_check_access_rights(conn,
 680                                 smb_fname,
 681                                 access_mask);
 682
 683                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 684                                 fsp->posix_open &&
 685                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 686                         /* This is a POSIX stat open for delete
 687                          * or rename on a symlink that points
 688                          * nowhere. Allow. */
 689                         DEBUG(10,("open_file: allowing POSIX "
 690                                   "open on bad symlink %s\n",
 691                                   smb_fname_str_dbg(smb_fname)));
 692                         status = NT_STATUS_OK;
 693                 }
 694
 695                 if (!NT_STATUS_IS_OK(status)) {
 696                         DEBUG(10,("open_file: "
 697                                 "smbd_check_access_rights on file "
 698                                 "%s returned %s\n",
 699                                 smb_fname_str_dbg(smb_fname),
 700                                 nt_errstr(status) ));
 701                         return status;
 702                 }
 703         }
 704
 705         if (!file_existed) {
 706                 int ret;
 707
 708                 if (fsp->fh->fd == -1) {
 709                         ret = SMB_VFS_STAT(conn, smb_fname);
 710                 } else {
 711                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 712                         /* If we have an fd, this stat should succeed. */
 713                         if (ret == -1) {
 714                                 DEBUG(0,("Error doing fstat on open file %s "
 715                                          "(%s)\n",
 716                                          smb_fname_str_dbg(smb_fname),
 717                                          strerror(errno) ));
 718                         }
 719                 }
 720
 721                 /* For a non-io open, this stat failing means file not found. JRA */
 722                 if (ret == -1) {
 723                         status = map_nt_error_from_unix(errno);
 724                         fd_close(fsp);
 725                         return status;
 726                 }
 727
 728                 if (file_created) {
 729                         bool need_re_stat = false;
 730                         /* Do all inheritance work after we've
 731                            done a successful stat call and filled
 732                            in the stat struct in fsp->fsp_name. */
 733
 734                         /* Inherit the ACL if required */
 735                         if (lp_inherit_perms(SNUM(conn))) {
 736                                 inherit_access_posix_acl(conn, parent_dir,
 737                                                          smb_fname->base_name,
 738                                                          unx_mode);
 739                                 need_re_stat = true;
 740                         }
 741
 742                         /* Change the owner if required. */
 743                         if (lp_inherit_owner(SNUM(conn))) {
 744                                 change_file_owner_to_parent(conn, parent_dir,
 745                                                             fsp);
 746                                 need_re_stat = true;
 747                         }
 748
 749                         if (need_re_stat) {
 750                                 if (fsp->fh->fd == -1) {
 751                                         ret = SMB_VFS_STAT(conn, smb_fname);
 752                                 } else {
 753                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 754                                         /* If we have an fd, this stat should succeed. */
 755                                         if (ret == -1) {
 756                                                 DEBUG(0,("Error doing fstat on open file %s "
 757                                                          "(%s)\n",
 758                                                          smb_fname_str_dbg(smb_fname),
 759                                                          strerror(errno) ));
 760                                         }
 761                                 }
 762                         }
 763
 764                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 765                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 766                                      smb_fname->base_name);
 767                 }
 768         }
 769
 770         /*
 771          * POSIX allows read-only opens of directories. We don't
 772          * want to do this (we use a different code path for this)
 773          * so catch a directory open and return an EISDIR. JRA.
 774          */
 775
 776         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 777                 fd_close(fsp);
 778                 errno = EISDIR;
 779                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 780         }
 781
 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_existing_share_mode_lock(
1598                 talloc_tos(), id);
1599         if (lck == NULL) {
1600                 DEBUG(0, ("could not get share mode lock\n"));
1601                 return;
1602         }
1603         del_deferred_open_entry(lck, mid, pid);
1604         TALLOC_FREE(lck);
1605 }
1606
1607 /****************************************************************************
1608  Open a file with a share mode. Passed in an already created files_struct *.
1609 ****************************************************************************/
1610
1611 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1612                             struct smb_request *req,
1613                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1614                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1615                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1616                             uint32 create_options,      /* options such as delete on close. */
1617                             uint32 new_dos_attributes,  /* attributes used for new file. */
1618                             int oplock_request,         /* internal Samba oplock codes. */
1619                                                         /* Information (FILE_EXISTS etc.) */
1620                             uint32_t private_flags,     /* Samba specific flags. */
1621                             int *pinfo,
1622                             files_struct *fsp)
1623 {
1624         struct smb_filename *smb_fname = fsp->fsp_name;
1625         int flags=0;
1626         int flags2=0;
1627         bool file_existed = VALID_STAT(smb_fname->st);
1628         bool def_acl = False;
1629         bool posix_open = False;
1630         bool new_file_created = False;
1631         bool clear_ads = false;
1632         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1633         mode_t new_unx_mode = (mode_t)0;
1634         mode_t unx_mode = (mode_t)0;
1635         int info;
1636         uint32 existing_dos_attributes = 0;
1637         struct timeval request_time = timeval_zero();
1638         struct share_mode_lock *lck = NULL;
1639         uint32 open_access_mask = access_mask;
1640         NTSTATUS status;
1641         char *parent_dir;
1642
1643         if (conn->printer) {
1644                 /*
1645                  * Printers are handled completely differently.
1646                  * Most of the passed parameters are ignored.
1647                  */
1648
1649                 if (pinfo) {
1650                         *pinfo = FILE_WAS_CREATED;
1651                 }
1652
1653                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1654                            smb_fname_str_dbg(smb_fname)));
1655
1656                 if (!req) {
1657                         DEBUG(0,("open_file_ntcreate: printer open without "
1658                                 "an SMB request!\n"));
1659                         return NT_STATUS_INTERNAL_ERROR;
1660                 }
1661
1662                 return print_spool_open(fsp, smb_fname->base_name,
1663                                         req->vuid);
1664         }
1665
1666         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1667                             NULL)) {
1668                 return NT_STATUS_NO_MEMORY;
1669         }
1670
1671         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1672                 posix_open = True;
1673                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1674                 new_dos_attributes = 0;
1675         } else {
1676                 /* Windows allows a new file to be created and
1677                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1678                    sent by the client. Do the same. */
1679
1680                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1681
1682                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1683                  * created new. */
1684                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1685                                      smb_fname, parent_dir);
1686         }
1687
1688         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1689                    "access_mask=0x%x share_access=0x%x "
1690                    "create_disposition = 0x%x create_options=0x%x "
1691                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1692                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1693                    access_mask, share_access, create_disposition,
1694                    create_options, (unsigned int)unx_mode, oplock_request,
1695                    (unsigned int)private_flags));
1696
1697         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1698                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1699                 return NT_STATUS_INTERNAL_ERROR;
1700         }
1701
1702         /*
1703          * Only non-internal opens can be deferred at all
1704          */
1705
1706         if (req) {
1707                 void *ptr;
1708                 if (get_deferred_open_message_state(req,
1709                                 &request_time,
1710                                 &ptr)) {
1711
1712                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1713                         /* Remember the absolute time of the original
1714                            request with this mid. We'll use it later to
1715                            see if this has timed out. */
1716
1717                         /* Remove the deferred open entry under lock. */
1718                         remove_deferred_open_entry(
1719                                 state->id, req->mid,
1720                                 messaging_server_id(req->sconn->msg_ctx));
1721
1722                         /* Ensure we don't reprocess this message. */
1723                         remove_deferred_open_message_smb(req->sconn, req->mid);
1724                 }
1725         }
1726
1727         if (!posix_open) {
1728                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1729                 if (file_existed) {
1730                         existing_dos_attributes = dos_mode(conn, smb_fname);
1731                 }
1732         }
1733
1734         /* ignore any oplock requests if oplocks are disabled */
1735         if (!lp_oplocks(SNUM(conn)) ||
1736             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1737                 /* Mask off everything except the private Samba bits. */
1738                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1739         }
1740
1741         /* this is for OS/2 long file names - say we don't support them */
1742         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1743                 /* OS/2 Workplace shell fix may be main code stream in a later
1744                  * release. */
1745                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1746                          "supported.\n"));
1747                 if (use_nt_status()) {
1748                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1749                 }
1750                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1751         }
1752
1753         switch( create_disposition ) {
1754                 /*
1755                  * Currently we're using FILE_SUPERSEDE as the same as
1756                  * FILE_OVERWRITE_IF but they really are
1757                  * different. FILE_SUPERSEDE deletes an existing file
1758                  * (requiring delete access) then recreates it.
1759                  */
1760                 case FILE_SUPERSEDE:
1761                         /* If file exists replace/overwrite. If file doesn't
1762                          * exist create. */
1763                         flags2 |= (O_CREAT | O_TRUNC);
1764                         clear_ads = true;
1765                         break;
1766
1767                 case FILE_OVERWRITE_IF:
1768                         /* If file exists replace/overwrite. If file doesn't
1769                          * exist create. */
1770                         flags2 |= (O_CREAT | O_TRUNC);
1771                         clear_ads = true;
1772                         break;
1773
1774                 case FILE_OPEN:
1775                         /* If file exists open. If file doesn't exist error. */
1776                         if (!file_existed) {
1777                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1778                                          "requested for file %s and file "
1779                                          "doesn't exist.\n",
1780                                          smb_fname_str_dbg(smb_fname)));
1781                                 errno = ENOENT;
1782                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1783                         }
1784                         break;
1785
1786                 case FILE_OVERWRITE:
1787                         /* If file exists overwrite. If file doesn't exist
1788                          * error. */
1789                         if (!file_existed) {
1790                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1791                                          "requested for file %s and file "
1792                                          "doesn't exist.\n",
1793                                          smb_fname_str_dbg(smb_fname) ));
1794                                 errno = ENOENT;
1795                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1796                         }
1797                         flags2 |= O_TRUNC;
1798                         clear_ads = true;
1799                         break;
1800
1801                 case FILE_CREATE:
1802                         /* If file exists error. If file doesn't exist
1803                          * create. */
1804                         if (file_existed) {
1805                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1806                                          "requested for file %s and file "
1807                                          "already exists.\n",
1808                                          smb_fname_str_dbg(smb_fname)));
1809                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1810                                         errno = EISDIR;
1811                                 } else {
1812                                         errno = EEXIST;
1813                                 }
1814                                 return map_nt_error_from_unix(errno);
1815                         }
1816                         flags2 |= (O_CREAT|O_EXCL);
1817                         break;
1818
1819                 case FILE_OPEN_IF:
1820                         /* If file exists open. If file doesn't exist
1821                          * create. */
1822                         flags2 |= O_CREAT;
1823                         break;
1824
1825                 default:
1826                         return NT_STATUS_INVALID_PARAMETER;
1827         }
1828
1829         /* We only care about matching attributes on file exists and
1830          * overwrite. */
1831
1832         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1833                              (create_disposition == FILE_OVERWRITE_IF))) {
1834                 if (!open_match_attributes(conn, existing_dos_attributes,
1835                                            new_dos_attributes,
1836                                            smb_fname->st.st_ex_mode,
1837                                            unx_mode, &new_unx_mode)) {
1838                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1839                                  "for file %s (%x %x) (0%o, 0%o)\n",
1840                                  smb_fname_str_dbg(smb_fname),
1841                                  existing_dos_attributes,
1842                                  new_dos_attributes,
1843                                  (unsigned int)smb_fname->st.st_ex_mode,
1844                                  (unsigned int)unx_mode ));
1845                         errno = EACCES;
1846                         return NT_STATUS_ACCESS_DENIED;
1847                 }
1848         }
1849
1850         status = smbd_calculate_access_mask(conn, smb_fname,
1851                                         access_mask,
1852                                         &access_mask);
1853         if (!NT_STATUS_IS_OK(status)) {
1854                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1855                         "on file %s returned %s\n",
1856                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1857                 return status;
1858         }
1859
1860         open_access_mask = access_mask;
1861
1862         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1863                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1864         }
1865
1866         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1867                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1868                     access_mask));
1869
1870         /*
1871          * Note that we ignore the append flag as append does not
1872          * mean the same thing under DOS and Unix.
1873          */
1874
1875         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1876                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1877                 /* DENY_DOS opens are always underlying read-write on the
1878                    file handle, no matter what the requested access mask
1879                     says. */
1880                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1881                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1882                         flags = O_RDWR;
1883                 } else {
1884                         flags = O_WRONLY;
1885                 }
1886         } else {
1887                 flags = O_RDONLY;
1888         }
1889
1890         /*
1891          * Currently we only look at FILE_WRITE_THROUGH for create options.
1892          */
1893
1894 #if defined(O_SYNC)
1895         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1896                 flags2 |= O_SYNC;
1897         }
1898 #endif /* O_SYNC */
1899
1900         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1901                 flags2 |= O_APPEND;
1902         }
1903
1904         if (!posix_open && !CAN_WRITE(conn)) {
1905                 /*
1906                  * We should really return a permission denied error if either
1907                  * O_CREAT or O_TRUNC are set, but for compatibility with
1908                  * older versions of Samba we just AND them out.
1909                  */
1910                 flags2 &= ~(O_CREAT|O_TRUNC);
1911         }
1912
1913         /*
1914          * Ensure we can't write on a read-only share or file.
1915          */
1916
1917         if (flags != O_RDONLY && file_existed &&
1918             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1919                 DEBUG(5,("open_file_ntcreate: write access requested for "
1920                          "file %s on read only %s\n",
1921                          smb_fname_str_dbg(smb_fname),
1922                          !CAN_WRITE(conn) ? "share" : "file" ));
1923                 errno = EACCES;
1924                 return NT_STATUS_ACCESS_DENIED;
1925         }
1926
1927         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1928         fsp->share_access = share_access;
1929         fsp->fh->private_options = private_flags;
1930         fsp->access_mask = open_access_mask; /* We change this to the
1931                                               * requested access_mask after
1932                                               * the open is done. */
1933         fsp->posix_open = posix_open;
1934
1935         /* Ensure no SAMBA_PRIVATE bits can be set. */
1936         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1937
1938         if (timeval_is_zero(&request_time)) {
1939                 request_time = fsp->open_time;
1940         }
1941
1942         if (file_existed) {
1943                 struct share_mode_entry *batch_entry = NULL;
1944                 struct share_mode_entry *exclusive_entry = NULL;
1945                 bool got_level2_oplock = false;
1946                 bool got_a_none_oplock = false;
1947                 struct file_id id;
1948
1949                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1950                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1951
1952                 lck = get_share_mode_lock(talloc_tos(), id,
1953                                           conn->connectpath,
1954                                           smb_fname, &old_write_time);
1955                 if (lck == NULL) {
1956                         DEBUG(0, ("Could not get share mode lock\n"));
1957                         return NT_STATUS_SHARING_VIOLATION;
1958                 }
1959
1960                 /* Get the types we need to examine. */
1961                 find_oplock_types(fsp,
1962                                 oplock_request,
1963                                 lck,
1964                                 &batch_entry,
1965                                 &exclusive_entry,
1966                                 &got_level2_oplock,
1967                                 &got_a_none_oplock);
1968
1969                 /* First pass - send break only on batch oplocks. */
1970                 if ((req != NULL) &&
1971                                 delay_for_batch_oplocks(fsp,
1972                                         req->mid,
1973                                         oplock_request,
1974                                         batch_entry)) {
1975                         schedule_defer_open(lck, request_time, req);
1976                         TALLOC_FREE(lck);
1977                         return NT_STATUS_SHARING_VIOLATION;
1978                 }
1979
1980                 /* Use the client requested access mask here, not the one we
1981                  * open with. */
1982                 status = open_mode_check(conn, lck, fsp->name_hash,
1983                                         access_mask, share_access,
1984                                          create_options, &file_existed);
1985
1986                 if (NT_STATUS_IS_OK(status)) {
1987                         /* We might be going to allow this open. Check oplock
1988                          * status again. */
1989                         /* Second pass - send break for both batch or
1990                          * exclusive oplocks. */
1991                         if ((req != NULL) &&
1992                                         delay_for_exclusive_oplocks(
1993                                                 fsp,
1994                                                 req->mid,
1995                                                 oplock_request,
1996                                                 exclusive_entry)) {
1997                                 schedule_defer_open(lck, request_time, req);
1998                                 TALLOC_FREE(lck);
1999                                 return NT_STATUS_SHARING_VIOLATION;
2000                         }
2001                 }
2002
2003                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2004                         /* DELETE_PENDING is not deferred for a second */
2005                         TALLOC_FREE(lck);
2006                         return status;
2007                 }
2008
2009                 grant_fsp_oplock_type(fsp,
2010                                 oplock_request,
2011                                 got_level2_oplock,
2012                                 got_a_none_oplock);
2013
2014                 if (!NT_STATUS_IS_OK(status)) {
2015                         uint32 can_access_mask;
2016                         bool can_access = True;
2017
2018                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2019
2020                         /* Check if this can be done with the deny_dos and fcb
2021                          * calls. */
2022                         if (private_flags &
2023                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2024                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2025                                 if (req == NULL) {
2026                                         DEBUG(0, ("DOS open without an SMB "
2027                                                   "request!\n"));
2028                                         TALLOC_FREE(lck);
2029                                         return NT_STATUS_INTERNAL_ERROR;
2030                                 }
2031
2032                                 /* Use the client requested access mask here,
2033                                  * not the one we open with. */
2034                                 status = fcb_or_dos_open(req,
2035                                                         conn,
2036                                                         fsp,
2037                                                         smb_fname,
2038                                                         id,
2039                                                         req->smbpid,
2040                                                         req->vuid,
2041                                                         access_mask,
2042                                                         share_access,
2043                                                         create_options);
2044
2045                                 if (NT_STATUS_IS_OK(status)) {
2046                                         TALLOC_FREE(lck);
2047                                         if (pinfo) {
2048                                                 *pinfo = FILE_WAS_OPENED;
2049                                         }
2050                                         return NT_STATUS_OK;
2051                                 }
2052                         }
2053
2054                         /*
2055                          * This next line is a subtlety we need for
2056                          * MS-Access. If a file open will fail due to share
2057                          * permissions and also for security (access) reasons,
2058                          * we need to return the access failed error, not the
2059                          * share error. We can't open the file due to kernel
2060                          * oplock deadlock (it's possible we failed above on
2061                          * the open_mode_check()) so use a userspace check.
2062                          */
2063
2064                         if (flags & O_RDWR) {
2065                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2066                         } else if (flags & O_WRONLY) {
2067                                 can_access_mask = FILE_WRITE_DATA;
2068                         } else {
2069                                 can_access_mask = FILE_READ_DATA;
2070                         }
2071
2072                         if (((can_access_mask & FILE_WRITE_DATA) &&
2073                                 !CAN_WRITE(conn)) ||
2074                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2075                                                 smb_fname, can_access_mask))) {
2076                                 can_access = False;
2077                         }
2078
2079                         /*
2080                          * If we're returning a share violation, ensure we
2081                          * cope with the braindead 1 second delay.
2082                          */
2083
2084                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2085                             lp_defer_sharing_violations()) {
2086                                 struct timeval timeout;
2087                                 struct deferred_open_record state;
2088                                 int timeout_usecs;
2089
2090                                 /* this is a hack to speed up torture tests
2091                                    in 'make test' */
2092                                 timeout_usecs = lp_parm_int(SNUM(conn),
2093                                                             "smbd","sharedelay",
2094                                                             SHARING_VIOLATION_USEC_WAIT);
2095
2096                                 /* This is a relative time, added to the absolute
2097                                    request_time value to get the absolute timeout time.
2098                                    Note that if this is the second or greater time we enter
2099                                    this codepath for this particular request mid then
2100                                    request_time is left as the absolute time of the *first*
2101                                    time this request mid was processed. This is what allows
2102                                    the request to eventually time out. */
2103
2104                                 timeout = timeval_set(0, timeout_usecs);
2105
2106                                 /* Nothing actually uses state.delayed_for_oplocks
2107                                    but it's handy to differentiate in debug messages
2108                                    between a 30 second delay due to oplock break, and
2109                                    a 1 second delay for share mode conflicts. */
2110
2111                                 state.delayed_for_oplocks = False;
2112                                 state.id = id;
2113
2114                                 if ((req != NULL)
2115                                     && !request_timed_out(request_time,
2116                                                           timeout)) {
2117                                         defer_open(lck, request_time, timeout,
2118                                                    req, &state);
2119                                 }
2120                         }
2121
2122                         TALLOC_FREE(lck);
2123                         if (can_access) {
2124                                 /*
2125                                  * We have detected a sharing violation here
2126                                  * so return the correct error code
2127                                  */
2128                                 status = NT_STATUS_SHARING_VIOLATION;
2129                         } else {
2130                                 status = NT_STATUS_ACCESS_DENIED;
2131                         }
2132                         return status;
2133                 }
2134
2135                 /*
2136                  * We exit this block with the share entry *locked*.....
2137                  */
2138         }
2139
2140         SMB_ASSERT(!file_existed || (lck != NULL));
2141
2142         /*
2143          * Ensure we pay attention to default ACLs on directories if required.
2144          */
2145
2146         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2147             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2148                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2149         }
2150
2151         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2152                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2153                  (unsigned int)flags, (unsigned int)flags2,
2154                  (unsigned int)unx_mode, (unsigned int)access_mask,
2155                  (unsigned int)open_access_mask));
2156
2157         /*
2158          * open_file strips any O_TRUNC flags itself.
2159          */
2160
2161         fsp_open = open_file(fsp, conn, req, parent_dir,
2162                              flags|flags2, unx_mode, access_mask,
2163                              open_access_mask);
2164
2165         if (!NT_STATUS_IS_OK(fsp_open)) {
2166                 TALLOC_FREE(lck);
2167                 return fsp_open;
2168         }
2169
2170         if (!file_existed) {
2171                 struct share_mode_entry *batch_entry = NULL;
2172                 struct share_mode_entry *exclusive_entry = NULL;
2173                 bool got_level2_oplock = false;
2174                 bool got_a_none_oplock = false;
2175                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2176                 struct file_id id;
2177                 /*
2178                  * Deal with the race condition where two smbd's detect the
2179                  * file doesn't exist and do the create at the same time. One
2180                  * of them will win and set a share mode, the other (ie. this
2181                  * one) should check if the requested share mode for this
2182                  * create is allowed.
2183                  */
2184
2185                 /*
2186                  * Now the file exists and fsp is successfully opened,
2187                  * fsp->dev and fsp->inode are valid and should replace the
2188                  * dev=0,inode=0 from a non existent file. Spotted by
2189                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2190                  */
2191
2192                 id = fsp->file_id;
2193
2194                 lck = get_share_mode_lock(talloc_tos(), id,
2195                                           conn->connectpath,
2196                                           smb_fname, &old_write_time);
2197
2198                 if (lck == NULL) {
2199                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2200                                   "mode lock for %s\n",
2201                                   smb_fname_str_dbg(smb_fname)));
2202                         fd_close(fsp);
2203                         return NT_STATUS_SHARING_VIOLATION;
2204                 }
2205
2206                 /* Get the types we need to examine. */
2207                 find_oplock_types(fsp,
2208                                 oplock_request,
2209                                 lck,
2210                                 &batch_entry,
2211                                 &exclusive_entry,
2212                                 &got_level2_oplock,
2213                                 &got_a_none_oplock);
2214
2215                 /* First pass - send break only on batch oplocks. */
2216                 if ((req != NULL) &&
2217                                 delay_for_batch_oplocks(fsp,
2218                                         req->mid,
2219                                         oplock_request,
2220                                         batch_entry)) {
2221                         schedule_defer_open(lck, request_time, req);
2222                         TALLOC_FREE(lck);
2223                         fd_close(fsp);
2224                         return NT_STATUS_SHARING_VIOLATION;
2225                 }
2226
2227                 status = open_mode_check(conn, lck, fsp->name_hash,
2228                                         access_mask, share_access,
2229                                          create_options, &file_existed);
2230
2231                 if (NT_STATUS_IS_OK(status)) {
2232                         /* We might be going to allow this open. Check oplock
2233                          * status again. */
2234                         /* Second pass - send break for both batch or
2235                          * exclusive oplocks. */
2236                         if ((req != NULL) &&
2237                                         delay_for_exclusive_oplocks(
2238                                                 fsp,
2239                                                 req->mid,
2240                                                 oplock_request,
2241                                                 exclusive_entry)) {
2242                                 schedule_defer_open(lck, request_time, req);
2243                                 TALLOC_FREE(lck);
2244                                 fd_close(fsp);
2245                                 return NT_STATUS_SHARING_VIOLATION;
2246                         }
2247                 }
2248
2249                 if (!NT_STATUS_IS_OK(status)) {
2250                         struct deferred_open_record state;
2251
2252                         state.delayed_for_oplocks = False;
2253                         state.id = id;
2254
2255                         /* Do it all over again immediately. In the second
2256                          * round we will find that the file existed and handle
2257                          * the DELETE_PENDING and FCB cases correctly. No need
2258                          * to duplicate the code here. Essentially this is a
2259                          * "goto top of this function", but don't tell
2260                          * anybody... */
2261
2262                         if (req != NULL) {
2263                                 defer_open(lck, request_time, timeval_zero(),
2264                                            req, &state);
2265                         }
2266                         TALLOC_FREE(lck);
2267                         fd_close(fsp);
2268                         return status;
2269                 }
2270
2271                 grant_fsp_oplock_type(fsp,
2272                                 oplock_request,
2273                                 got_level2_oplock,
2274                                 got_a_none_oplock);
2275
2276                 /*
2277                  * We exit this block with the share entry *locked*.....
2278                  */
2279
2280         }
2281
2282         SMB_ASSERT(lck != NULL);
2283
2284         /* Delete streams if create_disposition requires it */
2285         if (file_existed && clear_ads &&
2286             !is_ntfs_stream_smb_fname(smb_fname)) {
2287                 status = delete_all_streams(conn, smb_fname->base_name);
2288                 if (!NT_STATUS_IS_OK(status)) {
2289                         TALLOC_FREE(lck);
2290                         fd_close(fsp);
2291                         return status;
2292                 }
2293         }
2294
2295         /* note that we ignore failure for the following. It is
2296            basically a hack for NFS, and NFS will never set one of
2297            these only read them. Nobody but Samba can ever set a deny
2298            mode and we have already checked our more authoritative
2299            locking database for permission to set this deny mode. If
2300            the kernel refuses the operations then the kernel is wrong.
2301            note that GPFS supports it as well - jmcd */
2302
2303         if (fsp->fh->fd != -1) {
2304                 int ret_flock;
2305                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2306                 if(ret_flock == -1 ){
2307
2308                         TALLOC_FREE(lck);
2309                         fd_close(fsp);
2310
2311                         return NT_STATUS_SHARING_VIOLATION;
2312                 }
2313         }
2314
2315         /*
2316          * At this point onwards, we can guarentee that the share entry
2317          * is locked, whether we created the file or not, and that the
2318          * deny mode is compatible with all current opens.
2319          */
2320
2321         /*
2322          * If requested, truncate the file.
2323          */
2324
2325         if (file_existed && (flags2&O_TRUNC)) {
2326                 /*
2327                  * We are modifing the file after open - update the stat
2328                  * struct..
2329                  */
2330                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2331                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2332                         status = map_nt_error_from_unix(errno);
2333                         TALLOC_FREE(lck);
2334                         fd_close(fsp);
2335                         return status;
2336                 }
2337         }
2338
2339         /*
2340          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2341          * but we don't have to store this - just ignore it on access check.
2342          */
2343         if (conn->sconn->using_smb2) {
2344                 /*
2345                  * SMB2 doesn't return it (according to Microsoft tests).
2346                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2347                  * File created with access = 0x7 (Read, Write, Delete)
2348                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2349                  */
2350                 fsp->access_mask = access_mask;
2351         } else {
2352                 /* But SMB1 does. */
2353                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2354         }
2355
2356         if (file_existed) {
2357                 /* stat opens on existing files don't get oplocks. */
2358                 if (is_stat_open(open_access_mask)) {
2359                         fsp->oplock_type = NO_OPLOCK;
2360                 }
2361
2362                 if (flags2 & O_TRUNC) {
2363                         info = FILE_WAS_OVERWRITTEN;
2364                 } else {
2365                         info = FILE_WAS_OPENED;
2366                 }
2367         } else {
2368                 info = FILE_WAS_CREATED;
2369         }
2370
2371         if (pinfo) {
2372                 *pinfo = info;
2373         }
2374
2375         /*
2376          * Setup the oplock info in both the shared memory and
2377          * file structs.
2378          */
2379
2380         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2381                 /*
2382                  * Could not get the kernel oplock or there are byte-range
2383                  * locks on the file.
2384                  */
2385                 fsp->oplock_type = NO_OPLOCK;
2386         }
2387
2388         set_share_mode(lck, fsp, get_current_uid(conn),
2389                         req ? req->mid : 0,
2390                        fsp->oplock_type);
2391
2392         /* Handle strange delete on close create semantics. */
2393         if (create_options & FILE_DELETE_ON_CLOSE) {
2394
2395                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2396
2397                 if (!NT_STATUS_IS_OK(status)) {
2398                         /* Remember to delete the mode we just added. */
2399                         del_share_mode(lck, fsp);
2400                         TALLOC_FREE(lck);
2401                         fd_close(fsp);
2402                         return status;
2403                 }
2404                 /* Note that here we set the *inital* delete on close flag,
2405                    not the regular one. The magic gets handled in close. */
2406                 fsp->initial_delete_on_close = True;
2407         }
2408
2409         if (info == FILE_WAS_OVERWRITTEN
2410             || info == FILE_WAS_CREATED
2411             || info == FILE_WAS_SUPERSEDED) {
2412                 new_file_created = True;
2413         }
2414
2415         if (new_file_created) {
2416                 /* Files should be initially set as archive */
2417                 if (lp_map_archive(SNUM(conn)) ||
2418                     lp_store_dos_attributes(SNUM(conn))) {
2419                         if (!posix_open) {
2420                                 if (file_set_dosmode(conn, smb_fname,
2421                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2422                                             parent_dir, true) == 0) {
2423                                         unx_mode = smb_fname->st.st_ex_mode;
2424                                 }
2425                         }
2426                 }
2427         }
2428
2429         /* Determine sparse flag. */
2430         if (posix_open) {
2431                 /* POSIX opens are sparse by default. */
2432                 fsp->is_sparse = true;
2433         } else {
2434                 fsp->is_sparse = (file_existed &&
2435                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2436         }
2437
2438         /*
2439          * Take care of inherited ACLs on created files - if default ACL not
2440          * selected.
2441          */
2442
2443         if (!posix_open && !file_existed && !def_acl) {
2444
2445                 int saved_errno = errno; /* We might get ENOSYS in the next
2446                                           * call.. */
2447
2448                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2449                     errno == ENOSYS) {
2450                         errno = saved_errno; /* Ignore ENOSYS */
2451                 }
2452
2453         } else if (new_unx_mode) {
2454
2455                 int ret = -1;
2456
2457                 /* Attributes need changing. File already existed. */
2458
2459                 {
2460                         int saved_errno = errno; /* We might get ENOSYS in the
2461                                                   * next call.. */
2462                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2463
2464                         if (ret == -1 && errno == ENOSYS) {
2465                                 errno = saved_errno; /* Ignore ENOSYS */
2466                         } else {
2467                                 DEBUG(5, ("open_file_ntcreate: reset "
2468                                           "attributes of file %s to 0%o\n",
2469                                           smb_fname_str_dbg(smb_fname),
2470                                           (unsigned int)new_unx_mode));
2471                                 ret = 0; /* Don't do the fchmod below. */
2472                         }
2473                 }
2474
2475                 if ((ret == -1) &&
2476                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2477                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2478                                   "attributes of file %s to 0%o\n",
2479                                   smb_fname_str_dbg(smb_fname),
2480                                   (unsigned int)new_unx_mode));
2481         }
2482
2483         /* If this is a successful open, we must remove any deferred open
2484          * records. */
2485         if (req != NULL) {
2486                 del_deferred_open_entry(lck, req->mid,
2487                                         messaging_server_id(req->sconn->msg_ctx));
2488         }
2489         TALLOC_FREE(lck);
2490
2491         return NT_STATUS_OK;
2492 }
2493
2494
2495 /****************************************************************************
2496  Open a file for for write to ensure that we can fchmod it.
2497 ****************************************************************************/
2498
2499 NTSTATUS open_file_fchmod(connection_struct *conn,
2500                           struct smb_filename *smb_fname,
2501                           files_struct **result)
2502 {
2503         if (!VALID_STAT(smb_fname->st)) {
2504                 return NT_STATUS_INVALID_PARAMETER;
2505         }
2506
2507         return SMB_VFS_CREATE_FILE(
2508                 conn,                                   /* conn */
2509                 NULL,                                   /* req */
2510                 0,                                      /* root_dir_fid */
2511                 smb_fname,                              /* fname */
2512                 FILE_WRITE_DATA,                        /* access_mask */
2513                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2514                     FILE_SHARE_DELETE),
2515                 FILE_OPEN,                              /* create_disposition*/
2516                 0,                                      /* create_options */
2517                 0,                                      /* file_attributes */
2518                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2519                 0,                                      /* allocation_size */
2520                 0,                                      /* private_flags */
2521                 NULL,                                   /* sd */
2522                 NULL,                                   /* ea_list */
2523                 result,                                 /* result */
2524                 NULL);                                  /* pinfo */
2525 }
2526
2527 static NTSTATUS mkdir_internal(connection_struct *conn,
2528                                struct smb_filename *smb_dname,
2529                                uint32 file_attributes)
2530 {
2531         mode_t mode;
2532         char *parent_dir = NULL;
2533         NTSTATUS status;
2534         bool posix_open = false;
2535         bool need_re_stat = false;
2536         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2537
2538         if(access_mask & ~(conn->share_access)) {
2539                 DEBUG(5,("mkdir_internal: failing share access "
2540                          "%s\n", lp_servicename(SNUM(conn))));
2541                 return NT_STATUS_ACCESS_DENIED;
2542         }
2543
2544         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2545                             NULL)) {
2546                 return NT_STATUS_NO_MEMORY;
2547         }
2548
2549         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2550                 posix_open = true;
2551                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2552         } else {
2553                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2554         }
2555
2556         status = check_parent_access(conn,
2557                                         smb_dname,
2558                                         access_mask,
2559                                         &parent_dir);
2560         if(!NT_STATUS_IS_OK(status)) {
2561                 DEBUG(5,("mkdir_internal: check_parent_access "
2562                         "on directory %s for path %s returned %s\n",
2563                         parent_dir,
2564                         smb_dname->base_name,
2565                         nt_errstr(status) ));
2566                 return status;
2567         }
2568
2569         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2570                 return map_nt_error_from_unix(errno);
2571         }
2572
2573         /* Ensure we're checking for a symlink here.... */
2574         /* We don't want to get caught by a symlink racer. */
2575
2576         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2577                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2578                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2579                 return map_nt_error_from_unix(errno);
2580         }
2581
2582         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2583                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2584                           smb_fname_str_dbg(smb_dname)));
2585                 return NT_STATUS_NOT_A_DIRECTORY;
2586         }
2587
2588         if (lp_store_dos_attributes(SNUM(conn))) {
2589                 if (!posix_open) {
2590                         file_set_dosmode(conn, smb_dname,
2591                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2592                                          parent_dir, true);
2593                 }
2594         }
2595
2596         if (lp_inherit_perms(SNUM(conn))) {
2597                 inherit_access_posix_acl(conn, parent_dir,
2598                                          smb_dname->base_name, mode);
2599                 need_re_stat = true;
2600         }
2601
2602         if (!posix_open) {
2603                 /*
2604                  * Check if high bits should have been set,
2605                  * then (if bits are missing): add them.
2606                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2607                  * dir.
2608                  */
2609                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2610                     (mode & ~smb_dname->st.st_ex_mode)) {
2611                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2612                                       (smb_dname->st.st_ex_mode |
2613                                           (mode & ~smb_dname->st.st_ex_mode)));
2614                         need_re_stat = true;
2615                 }
2616         }
2617
2618         /* Change the owner if required. */
2619         if (lp_inherit_owner(SNUM(conn))) {
2620                 change_dir_owner_to_parent(conn, parent_dir,
2621                                            smb_dname->base_name,
2622                                            &smb_dname->st);
2623                 need_re_stat = true;
2624         }
2625
2626         if (need_re_stat) {
2627                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2628                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2629                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2630                         return map_nt_error_from_unix(errno);
2631                 }
2632         }
2633
2634         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2635                      smb_dname->base_name);
2636
2637         return NT_STATUS_OK;
2638 }
2639
2640 /****************************************************************************
2641  Ensure we didn't get symlink raced on opening a directory.
2642 ****************************************************************************/
2643
2644 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2645                         const SMB_STRUCT_STAT *sbuf2)
2646 {
2647         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2648                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2649                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2650                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2651                 return false;
2652         }
2653         return true;
2654 }
2655
2656 /****************************************************************************
2657  Open a directory from an NT SMB call.
2658 ****************************************************************************/
2659
2660 static NTSTATUS open_directory(connection_struct *conn,
2661                                struct smb_request *req,
2662                                struct smb_filename *smb_dname,
2663                                uint32 access_mask,
2664                                uint32 share_access,
2665                                uint32 create_disposition,
2666                                uint32 create_options,
2667                                uint32 file_attributes,
2668                                int *pinfo,
2669                                files_struct **result)
2670 {
2671         files_struct *fsp = NULL;
2672         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2673         struct share_mode_lock *lck = NULL;
2674         NTSTATUS status;
2675         struct timespec mtimespec;
2676         int info = 0;
2677
2678         if (is_ntfs_stream_smb_fname(smb_dname)) {
2679                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2680                           smb_fname_str_dbg(smb_dname)));
2681                 return NT_STATUS_NOT_A_DIRECTORY;
2682         }
2683
2684         /* Ensure we have a directory attribute. */
2685         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2686
2687         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2688                  "share_access = 0x%x create_options = 0x%x, "
2689                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2690                  smb_fname_str_dbg(smb_dname),
2691                  (unsigned int)access_mask,
2692                  (unsigned int)share_access,
2693                  (unsigned int)create_options,
2694                  (unsigned int)create_disposition,
2695                  (unsigned int)file_attributes));
2696
2697         status = smbd_calculate_access_mask(conn, smb_dname,
2698                                             access_mask, &access_mask);
2699         if (!NT_STATUS_IS_OK(status)) {
2700                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2701                         "on file %s returned %s\n",
2702                         smb_fname_str_dbg(smb_dname),
2703                         nt_errstr(status)));
2704                 return status;
2705         }
2706
2707         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2708                         !security_token_has_privilege(get_current_nttok(conn),
2709                                         SEC_PRIV_SECURITY)) {
2710                 DEBUG(10, ("open_directory: open on %s "
2711                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2712                         smb_fname_str_dbg(smb_dname)));
2713                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2714         }
2715
2716         switch( create_disposition ) {
2717                 case FILE_OPEN:
2718
2719                         if (!dir_existed) {
2720                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2721                         }
2722
2723                         info = FILE_WAS_OPENED;
2724                         break;
2725
2726                 case FILE_CREATE:
2727
2728                         /* If directory exists error. If directory doesn't
2729                          * exist create. */
2730
2731                         if (dir_existed) {
2732                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2733                                 DEBUG(2, ("open_directory: unable to create "
2734                                           "%s. Error was %s\n",
2735                                           smb_fname_str_dbg(smb_dname),
2736                                           nt_errstr(status)));
2737                                 return status;
2738                         }
2739
2740                         status = mkdir_internal(conn, smb_dname,
2741                                                 file_attributes);
2742
2743                         if (!NT_STATUS_IS_OK(status)) {
2744                                 DEBUG(2, ("open_directory: unable to create "
2745                                           "%s. Error was %s\n",
2746                                           smb_fname_str_dbg(smb_dname),
2747                                           nt_errstr(status)));
2748                                 return status;
2749                         }
2750
2751                         info = FILE_WAS_CREATED;
2752                         break;
2753
2754                 case FILE_OPEN_IF:
2755                         /*
2756                          * If directory exists open. If directory doesn't
2757                          * exist create.
2758                          */
2759
2760                         if (dir_existed) {
2761                                 status = NT_STATUS_OK;
2762                                 info = FILE_WAS_OPENED;
2763                         } else {
2764                                 status = mkdir_internal(conn, smb_dname,
2765                                                 file_attributes);
2766
2767                                 if (NT_STATUS_IS_OK(status)) {
2768                                         info = FILE_WAS_CREATED;
2769                                 } else {
2770                                         /* Cope with create race. */
2771                                         if (!NT_STATUS_EQUAL(status,
2772                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2773                                                 DEBUG(2, ("open_directory: unable to create "
2774                                                         "%s. Error was %s\n",
2775                                                         smb_fname_str_dbg(smb_dname),
2776                                                         nt_errstr(status)));
2777                                                 return status;
2778                                         }
2779                                         info = FILE_WAS_OPENED;
2780                                 }
2781                         }
2782
2783                         break;
2784
2785                 case FILE_SUPERSEDE:
2786                 case FILE_OVERWRITE:
2787                 case FILE_OVERWRITE_IF:
2788                 default:
2789                         DEBUG(5,("open_directory: invalid create_disposition "
2790                                  "0x%x for directory %s\n",
2791                                  (unsigned int)create_disposition,
2792                                  smb_fname_str_dbg(smb_dname)));
2793                         return NT_STATUS_INVALID_PARAMETER;
2794         }
2795
2796         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2797                 DEBUG(5,("open_directory: %s is not a directory !\n",
2798                          smb_fname_str_dbg(smb_dname)));
2799                 return NT_STATUS_NOT_A_DIRECTORY;
2800         }
2801
2802         if (info == FILE_WAS_OPENED) {
2803                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2804                 if (!NT_STATUS_IS_OK(status)) {
2805                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2806                                 "file %s failed with %s\n",
2807                                 smb_fname_str_dbg(smb_dname),
2808                                 nt_errstr(status)));
2809                         return status;
2810                 }
2811         }
2812
2813         status = file_new(req, conn, &fsp);
2814         if(!NT_STATUS_IS_OK(status)) {
2815                 return status;
2816         }
2817
2818         /*
2819          * Setup the files_struct for it.
2820          */
2821
2822         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2823         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2824         fsp->file_pid = req ? req->smbpid : 0;
2825         fsp->can_lock = False;
2826         fsp->can_read = False;
2827         fsp->can_write = False;
2828
2829         fsp->share_access = share_access;
2830         fsp->fh->private_options = 0;
2831         /*
2832          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2833          */
2834         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2835         fsp->print_file = NULL;
2836         fsp->modified = False;
2837         fsp->oplock_type = NO_OPLOCK;
2838         fsp->sent_oplock_break = NO_BREAK_SENT;
2839         fsp->is_directory = True;
2840         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2841         status = fsp_set_smb_fname(fsp, smb_dname);
2842         if (!NT_STATUS_IS_OK(status)) {
2843                 file_free(req, fsp);
2844                 return status;
2845         }
2846
2847         mtimespec = smb_dname->st.st_ex_mtime;
2848
2849 #ifdef O_DIRECTORY
2850         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2851 #else
2852         /* POSIX allows us to open a directory with O_RDONLY. */
2853         status = fd_open(conn, fsp, O_RDONLY, 0);
2854 #endif
2855         if (!NT_STATUS_IS_OK(status)) {
2856                 DEBUG(5, ("open_directory: Could not open fd for "
2857                         "%s (%s)\n",
2858                         smb_fname_str_dbg(smb_dname),
2859                         nt_errstr(status)));
2860                 file_free(req, fsp);
2861                 return status;
2862         }
2863
2864         status = vfs_stat_fsp(fsp);
2865         if (!NT_STATUS_IS_OK(status)) {
2866                 fd_close(fsp);
2867                 file_free(req, fsp);
2868                 return status;
2869         }
2870
2871         /* Ensure there was no race condition. */
2872         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2873                 DEBUG(5,("open_directory: stat struct differs for "
2874                         "directory %s.\n",
2875                         smb_fname_str_dbg(smb_dname)));
2876                 fd_close(fsp);
2877                 file_free(req, fsp);
2878                 return NT_STATUS_ACCESS_DENIED;
2879         }
2880
2881         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2882                                   conn->connectpath, smb_dname,
2883                                   &mtimespec);
2884
2885         if (lck == NULL) {
2886                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2887                           "%s\n", smb_fname_str_dbg(smb_dname)));
2888                 fd_close(fsp);
2889                 file_free(req, fsp);
2890                 return NT_STATUS_SHARING_VIOLATION;
2891         }
2892
2893         status = open_mode_check(conn, lck, fsp->name_hash,
2894                                 access_mask, share_access,
2895                                  create_options, &dir_existed);
2896
2897         if (!NT_STATUS_IS_OK(status)) {
2898                 TALLOC_FREE(lck);
2899                 fd_close(fsp);
2900                 file_free(req, fsp);
2901                 return status;
2902         }
2903
2904         set_share_mode(lck, fsp, get_current_uid(conn),
2905                         req ? req->mid : 0, NO_OPLOCK);
2906
2907         /* For directories the delete on close bit at open time seems
2908            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2909         if (create_options & FILE_DELETE_ON_CLOSE) {
2910                 status = can_set_delete_on_close(fsp, 0);
2911                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2912                         TALLOC_FREE(lck);
2913                         fd_close(fsp);
2914                         file_free(req, fsp);
2915                         return status;
2916                 }
2917
2918                 if (NT_STATUS_IS_OK(status)) {
2919                         /* Note that here we set the *inital* delete on close flag,
2920                            not the regular one. The magic gets handled in close. */
2921                         fsp->initial_delete_on_close = True;
2922                 }
2923         }
2924
2925         TALLOC_FREE(lck);
2926
2927         if (pinfo) {
2928                 *pinfo = info;
2929         }
2930
2931         *result = fsp;
2932         return NT_STATUS_OK;
2933 }
2934
2935 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2936                           struct smb_filename *smb_dname)
2937 {
2938         NTSTATUS status;
2939         files_struct *fsp;
2940
2941         status = SMB_VFS_CREATE_FILE(
2942                 conn,                                   /* conn */
2943                 req,                                    /* req */
2944                 0,                                      /* root_dir_fid */
2945                 smb_dname,                              /* fname */
2946                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2947                 FILE_SHARE_NONE,                        /* share_access */
2948                 FILE_CREATE,                            /* create_disposition*/
2949                 FILE_DIRECTORY_FILE,                    /* create_options */
2950                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2951                 0,                                      /* oplock_request */
2952                 0,                                      /* allocation_size */
2953                 0,                                      /* private_flags */
2954                 NULL,                                   /* sd */
2955                 NULL,                                   /* ea_list */
2956                 &fsp,                                   /* result */
2957                 NULL);                                  /* pinfo */
2958
2959         if (NT_STATUS_IS_OK(status)) {
2960                 close_file(req, fsp, NORMAL_CLOSE);
2961         }
2962
2963         return status;
2964 }
2965
2966 /****************************************************************************
2967  Receive notification that one of our open files has been renamed by another
2968  smbd process.
2969 ****************************************************************************/
2970
2971 void msg_file_was_renamed(struct messaging_context *msg,
2972                           void *private_data,
2973                           uint32_t msg_type,
2974                           struct server_id server_id,
2975                           DATA_BLOB *data)
2976 {
2977         files_struct *fsp;
2978         char *frm = (char *)data->data;
2979         struct file_id id;
2980         const char *sharepath;
2981         const char *base_name;
2982         const char *stream_name;
2983         struct smb_filename *smb_fname = NULL;
2984         size_t sp_len, bn_len;
2985         NTSTATUS status;
2986         struct smbd_server_connection *sconn =
2987                 talloc_get_type_abort(private_data,
2988                 struct smbd_server_connection);
2989
2990         if (data->data == NULL
2991             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2992                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2993                           (int)data->length));
2994                 return;
2995         }
2996
2997         /* Unpack the message. */
2998         pull_file_id_24(frm, &id);
2999         sharepath = &frm[24];
3000         sp_len = strlen(sharepath);
3001         base_name = sharepath + sp_len + 1;
3002         bn_len = strlen(base_name);
3003         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3004
3005         /* stream_name must always be NULL if there is no stream. */
3006         if (stream_name[0] == '\0') {
3007                 stream_name = NULL;
3008         }
3009
3010         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3011                                             stream_name, NULL, &smb_fname);
3012         if (!NT_STATUS_IS_OK(status)) {
3013                 return;
3014         }
3015
3016         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3017                 "file_id %s\n",
3018                 sharepath, smb_fname_str_dbg(smb_fname),
3019                 file_id_string_tos(&id)));
3020
3021         for(fsp = file_find_di_first(sconn, id); fsp;
3022             fsp = file_find_di_next(fsp)) {
3023                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3024
3025                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3026                                 fsp->fnum, fsp_str_dbg(fsp),
3027                                 smb_fname_str_dbg(smb_fname)));
3028                         status = fsp_set_smb_fname(fsp, smb_fname);
3029                         if (!NT_STATUS_IS_OK(status)) {
3030                                 goto out;
3031                         }
3032                 } else {
3033                         /* TODO. JRA. */
3034                         /* Now we have the complete path we can work out if this is
3035                            actually within this share and adjust newname accordingly. */
3036                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3037                                 "not sharepath %s) "
3038                                 "fnum %d from %s -> %s\n",
3039                                 fsp->conn->connectpath,
3040                                 sharepath,
3041                                 fsp->fnum,
3042                                 fsp_str_dbg(fsp),
3043                                 smb_fname_str_dbg(smb_fname)));
3044                 }
3045         }
3046  out:
3047         TALLOC_FREE(smb_fname);
3048         return;
3049 }
3050
3051 /*
3052  * If a main file is opened for delete, all streams need to be checked for
3053  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3054  * If that works, delete them all by setting the delete on close and close.
3055  */
3056
3057 NTSTATUS open_streams_for_delete(connection_struct *conn,
3058                                         const char *fname)
3059 {
3060         struct stream_struct *stream_info = NULL;
3061         files_struct **streams = NULL;
3062         int i;
3063         unsigned int num_streams = 0;
3064         TALLOC_CTX *frame = talloc_stackframe();
3065         NTSTATUS status;
3066
3067         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3068                                 &num_streams, &stream_info);
3069
3070         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3071             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3072                 DEBUG(10, ("no streams around\n"));
3073                 TALLOC_FREE(frame);
3074                 return NT_STATUS_OK;
3075         }
3076
3077         if (!NT_STATUS_IS_OK(status)) {
3078                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3079                            nt_errstr(status)));
3080                 goto fail;
3081         }
3082
3083         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3084                    num_streams));
3085
3086         if (num_streams == 0) {
3087                 TALLOC_FREE(frame);
3088                 return NT_STATUS_OK;
3089         }
3090
3091         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3092         if (streams == NULL) {
3093                 DEBUG(0, ("talloc failed\n"));
3094                 status = NT_STATUS_NO_MEMORY;
3095                 goto fail;
3096         }
3097
3098         for (i=0; i<num_streams; i++) {
3099                 struct smb_filename *smb_fname = NULL;
3100
3101                 if (strequal(stream_info[i].name, "::$DATA")) {
3102                         streams[i] = NULL;
3103                         continue;
3104                 }
3105
3106                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3107                                                     stream_info[i].name,
3108                                                     NULL, &smb_fname);
3109                 if (!NT_STATUS_IS_OK(status)) {
3110                         goto fail;
3111                 }
3112
3113                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3114                         DEBUG(10, ("Unable to stat stream: %s\n",
3115                                    smb_fname_str_dbg(smb_fname)));
3116                 }
3117
3118                 status = SMB_VFS_CREATE_FILE(
3119                          conn,                  /* conn */
3120                          NULL,                  /* req */
3121                          0,                     /* root_dir_fid */
3122                          smb_fname,             /* fname */
3123                          DELETE_ACCESS,         /* access_mask */
3124                          (FILE_SHARE_READ |     /* share_access */
3125                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3126                          FILE_OPEN,             /* create_disposition*/
3127                          0,                     /* create_options */
3128                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3129                          0,                     /* oplock_request */
3130                          0,                     /* allocation_size */
3131                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3132                          NULL,                  /* sd */
3133                          NULL,                  /* ea_list */
3134                          &streams[i],           /* result */
3135                          NULL);                 /* pinfo */
3136
3137                 if (!NT_STATUS_IS_OK(status)) {
3138                         DEBUG(10, ("Could not open stream %s: %s\n",
3139                                    smb_fname_str_dbg(smb_fname),
3140                                    nt_errstr(status)));
3141
3142                         TALLOC_FREE(smb_fname);
3143                         break;
3144                 }
3145                 TALLOC_FREE(smb_fname);
3146         }
3147
3148         /*
3149          * don't touch the variable "status" beyond this point :-)
3150          */
3151
3152         for (i -= 1 ; i >= 0; i--) {
3153                 if (streams[i] == NULL) {
3154                         continue;
3155                 }
3156
3157                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3158                            fsp_str_dbg(streams[i])));
3159                 close_file(NULL, streams[i], NORMAL_CLOSE);
3160         }
3161
3162  fail:
3163         TALLOC_FREE(frame);
3164         return status;
3165 }
3166
3167 /*********************************************************************
3168  Create a default ACL by inheriting from the parent. If no inheritance
3169  from the parent available, don't set anything. This will leave the actual
3170  permissions the new file or directory already got from the filesystem
3171  as the NT ACL when read.
3172 *********************************************************************/
3173
3174 static NTSTATUS inherit_new_acl(files_struct *fsp)
3175 {
3176         TALLOC_CTX *ctx = talloc_tos();
3177         char *parent_name = NULL;
3178         struct security_descriptor *parent_desc = NULL;
3179         NTSTATUS status = NT_STATUS_OK;
3180         struct security_descriptor *psd = NULL;
3181         struct dom_sid *owner_sid = NULL;
3182         struct dom_sid *group_sid = NULL;
3183         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3184         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3185         bool inheritable_components = false;
3186         size_t size = 0;
3187
3188         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3189                 return NT_STATUS_NO_MEMORY;
3190         }
3191
3192         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3193                                 parent_name,
3194                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3195                                 &parent_desc);
3196         if (!NT_STATUS_IS_OK(status)) {
3197                 return status;
3198         }
3199
3200         inheritable_components = sd_has_inheritable_components(parent_desc,
3201                                         fsp->is_directory);
3202
3203         if (!inheritable_components && !inherit_owner) {
3204                 /* Nothing to inherit and not setting owner. */
3205                 return NT_STATUS_OK;
3206         }
3207
3208         /* Create an inherited descriptor from the parent. */
3209
3210         if (DEBUGLEVEL >= 10) {
3211                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3212                         fsp_str_dbg(fsp) ));
3213                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3214         }
3215
3216         /* Inherit from parent descriptor if "inherit owner" set. */
3217         if (inherit_owner) {
3218                 owner_sid = parent_desc->owner_sid;
3219                 group_sid = parent_desc->group_sid;
3220         }
3221
3222         if (owner_sid == NULL) {
3223                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3224         }
3225         if (group_sid == NULL) {
3226                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3227         }
3228
3229         status = se_create_child_secdesc(ctx,
3230                         &psd,
3231                         &size,
3232                         parent_desc,
3233                         owner_sid,
3234                         group_sid,
3235                         fsp->is_directory);
3236         if (!NT_STATUS_IS_OK(status)) {
3237                 return status;
3238         }
3239
3240         /* If inheritable_components == false,
3241            se_create_child_secdesc()
3242            creates a security desriptor with a NULL dacl
3243            entry, but with SEC_DESC_DACL_PRESENT. We need
3244            to remove that flag. */
3245
3246         if (!inheritable_components) {
3247                 security_info_sent &= ~SECINFO_DACL;
3248                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3249         }
3250
3251         if (DEBUGLEVEL >= 10) {
3252                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3253                         fsp_str_dbg(fsp) ));
3254                 NDR_PRINT_DEBUG(security_descriptor, psd);
3255         }
3256
3257         if (inherit_owner) {
3258                 /* We need to be root to force this. */
3259                 become_root();
3260         }
3261         status = SMB_VFS_FSET_NT_ACL(fsp,
3262                         security_info_sent,
3263                         psd);
3264         if (inherit_owner) {
3265                 unbecome_root();
3266         }
3267         return status;
3268 }
3269
3270 /*
3271  * Wrapper around open_file_ntcreate and open_directory
3272  */
3273
3274 static NTSTATUS create_file_unixpath(connection_struct *conn,
3275                                      struct smb_request *req,
3276                                      struct smb_filename *smb_fname,
3277                                      uint32_t access_mask,
3278                                      uint32_t share_access,
3279                                      uint32_t create_disposition,
3280                                      uint32_t create_options,
3281                                      uint32_t file_attributes,
3282                                      uint32_t oplock_request,
3283                                      uint64_t allocation_size,
3284                                      uint32_t private_flags,
3285                                      struct security_descriptor *sd,
3286                                      struct ea_list *ea_list,
3287
3288                                      files_struct **result,
3289                                      int *pinfo)
3290 {
3291         int info = FILE_WAS_OPENED;
3292         files_struct *base_fsp = NULL;
3293         files_struct *fsp = NULL;
3294         NTSTATUS status;
3295
3296         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3297                   "file_attributes = 0x%x, share_access = 0x%x, "
3298                   "create_disposition = 0x%x create_options = 0x%x "
3299                   "oplock_request = 0x%x private_flags = 0x%x "
3300                   "ea_list = 0x%p, sd = 0x%p, "
3301                   "fname = %s\n",
3302                   (unsigned int)access_mask,
3303                   (unsigned int)file_attributes,
3304                   (unsigned int)share_access,
3305                   (unsigned int)create_disposition,
3306                   (unsigned int)create_options,
3307                   (unsigned int)oplock_request,
3308                   (unsigned int)private_flags,
3309                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3310
3311         if (create_options & FILE_OPEN_BY_FILE_ID) {
3312                 status = NT_STATUS_NOT_SUPPORTED;
3313                 goto fail;
3314         }
3315
3316         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3317                 status = NT_STATUS_INVALID_PARAMETER;
3318                 goto fail;
3319         }
3320
3321         if (req == NULL) {
3322                 oplock_request |= INTERNAL_OPEN_ONLY;
3323         }
3324
3325         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3326             && (access_mask & DELETE_ACCESS)
3327             && !is_ntfs_stream_smb_fname(smb_fname)) {
3328                 /*
3329                  * We can't open a file with DELETE access if any of the
3330                  * streams is open without FILE_SHARE_DELETE
3331                  */
3332                 status = open_streams_for_delete(conn, smb_fname->base_name);
3333
3334                 if (!NT_STATUS_IS_OK(status)) {
3335                         goto fail;
3336                 }
3337         }
3338
3339         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3340                         !security_token_has_privilege(get_current_nttok(conn),
3341                                         SEC_PRIV_SECURITY)) {
3342                 DEBUG(10, ("create_file_unixpath: open on %s "
3343                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3344                         smb_fname_str_dbg(smb_fname)));
3345                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3346                 goto fail;
3347         }
3348
3349         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3350             && is_ntfs_stream_smb_fname(smb_fname)
3351             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3352                 uint32 base_create_disposition;
3353                 struct smb_filename *smb_fname_base = NULL;
3354
3355                 if (create_options & FILE_DIRECTORY_FILE) {
3356                         status = NT_STATUS_NOT_A_DIRECTORY;
3357                         goto fail;
3358                 }
3359
3360                 switch (create_disposition) {
3361                 case FILE_OPEN:
3362                         base_create_disposition = FILE_OPEN;
3363                         break;
3364                 default:
3365                         base_create_disposition = FILE_OPEN_IF;
3366                         break;
3367                 }
3368
3369                 /* Create an smb_filename with stream_name == NULL. */
3370                 status = create_synthetic_smb_fname(talloc_tos(),
3371                                                     smb_fname->base_name,
3372                                                     NULL, NULL,
3373                                                     &smb_fname_base);
3374                 if (!NT_STATUS_IS_OK(status)) {
3375                         goto fail;
3376                 }
3377
3378                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3379                         DEBUG(10, ("Unable to stat stream: %s\n",
3380                                    smb_fname_str_dbg(smb_fname_base)));
3381                 }
3382
3383                 /* Open the base file. */
3384                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3385                                               FILE_SHARE_READ
3386                                               | FILE_SHARE_WRITE
3387                                               | FILE_SHARE_DELETE,
3388                                               base_create_disposition,
3389                                               0, 0, 0, 0, 0, NULL, NULL,
3390                                               &base_fsp, NULL);
3391                 TALLOC_FREE(smb_fname_base);
3392
3393                 if (!NT_STATUS_IS_OK(status)) {
3394                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3395                                    "%s\n", smb_fname->base_name,
3396                                    nt_errstr(status)));
3397                         goto fail;
3398                 }
3399                 /* we don't need to low level fd */
3400                 fd_close(base_fsp);
3401         }
3402
3403         /*
3404          * If it's a request for a directory open, deal with it separately.
3405          */
3406
3407         if (create_options & FILE_DIRECTORY_FILE) {
3408
3409                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3410                         status = NT_STATUS_INVALID_PARAMETER;
3411                         goto fail;
3412                 }
3413
3414                 /* Can't open a temp directory. IFS kit test. */
3415                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3416                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3417                         status = NT_STATUS_INVALID_PARAMETER;
3418                         goto fail;
3419                 }
3420
3421                 /*
3422                  * We will get a create directory here if the Win32
3423                  * app specified a security descriptor in the
3424                  * CreateDirectory() call.
3425                  */
3426
3427                 oplock_request = 0;
3428                 status = open_directory(
3429                         conn, req, smb_fname, access_mask, share_access,
3430                         create_disposition, create_options, file_attributes,
3431                         &info, &fsp);
3432         } else {
3433
3434                 /*
3435                  * Ordinary file case.
3436                  */
3437
3438                 status = file_new(req, conn, &fsp);
3439                 if(!NT_STATUS_IS_OK(status)) {
3440                         goto fail;
3441                 }
3442
3443                 status = fsp_set_smb_fname(fsp, smb_fname);
3444                 if (!NT_STATUS_IS_OK(status)) {
3445                         goto fail;
3446                 }
3447
3448                 /*
3449                  * We're opening the stream element of a base_fsp
3450                  * we already opened. Set up the base_fsp pointer.
3451                  */
3452                 if (base_fsp) {
3453                         fsp->base_fsp = base_fsp;
3454                 }
3455
3456                 status = open_file_ntcreate(conn,
3457                                             req,
3458                                             access_mask,
3459                                             share_access,
3460                                             create_disposition,
3461                                             create_options,
3462                                             file_attributes,
3463                                             oplock_request,
3464                                             private_flags,
3465                                             &info,
3466                                             fsp);
3467
3468                 if(!NT_STATUS_IS_OK(status)) {
3469                         file_free(req, fsp);
3470                         fsp = NULL;
3471                 }
3472
3473                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3474
3475                         /* A stream open never opens a directory */
3476
3477                         if (base_fsp) {
3478                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3479                                 goto fail;
3480                         }
3481
3482                         /*
3483                          * Fail the open if it was explicitly a non-directory
3484                          * file.
3485                          */
3486
3487                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3488                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3489                                 goto fail;
3490                         }
3491
3492                         oplock_request = 0;
3493                         status = open_directory(
3494                                 conn, req, smb_fname, access_mask,
3495                                 share_access, create_disposition,
3496                                 create_options, file_attributes,
3497                                 &info, &fsp);
3498                 }
3499         }
3500
3501         if (!NT_STATUS_IS_OK(status)) {
3502                 goto fail;
3503         }
3504
3505         fsp->base_fsp = base_fsp;
3506
3507         if ((ea_list != NULL) &&
3508             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3509                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3510                 if (!NT_STATUS_IS_OK(status)) {
3511                         goto fail;
3512                 }
3513         }
3514
3515         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3516                 status = NT_STATUS_ACCESS_DENIED;
3517                 goto fail;
3518         }
3519
3520         /* Save the requested allocation size. */
3521         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3522                 if (allocation_size
3523                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3524                         fsp->initial_allocation_size = smb_roundup(
3525                                 fsp->conn, allocation_size);
3526                         if (fsp->is_directory) {
3527                                 /* Can't set allocation size on a directory. */
3528                                 status = NT_STATUS_ACCESS_DENIED;
3529                                 goto fail;
3530                         }
3531                         if (vfs_allocate_file_space(
3532                                     fsp, fsp->initial_allocation_size) == -1) {
3533                                 status = NT_STATUS_DISK_FULL;
3534                                 goto fail;
3535                         }
3536                 } else {
3537                         fsp->initial_allocation_size = smb_roundup(
3538                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3539                 }
3540         }
3541
3542         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3543                                 fsp->base_fsp == NULL) {
3544                 if (sd != NULL) {
3545                         /*
3546                          * According to the MS documentation, the only time the security
3547                          * descriptor is applied to the opened file is iff we *created* the
3548                          * file; an existing file stays the same.
3549                          *
3550                          * Also, it seems (from observation) that you can open the file with
3551                          * any access mask but you can still write the sd. We need to override
3552                          * the granted access before we call set_sd
3553                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3554                          */
3555
3556                         uint32_t sec_info_sent;
3557                         uint32_t saved_access_mask = fsp->access_mask;
3558
3559                         sec_info_sent = get_sec_info(sd);
3560
3561                         fsp->access_mask = FILE_GENERIC_ALL;
3562
3563                         /* Convert all the generic bits. */
3564                         security_acl_map_generic(sd->dacl, &file_generic_mapping);
3565                         security_acl_map_generic(sd->sacl, &file_generic_mapping);
3566
3567                         if (sec_info_sent & (SECINFO_OWNER|
3568                                                 SECINFO_GROUP|
3569                                                 SECINFO_DACL|
3570                                                 SECINFO_SACL)) {
3571                                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3572                         }
3573
3574                         fsp->access_mask = saved_access_mask;
3575
3576                         if (!NT_STATUS_IS_OK(status)) {
3577                                 goto fail;
3578                         }
3579                 } else if (lp_inherit_acls(SNUM(conn))) {
3580                         /* Inherit from parent. Errors here are not fatal. */
3581                         status = inherit_new_acl(fsp);
3582                         if (!NT_STATUS_IS_OK(status)) {
3583                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3584                                         fsp_str_dbg(fsp),
3585                                         nt_errstr(status) ));
3586                         }
3587                 }
3588         }
3589
3590         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3591
3592         *result = fsp;
3593         if (pinfo != NULL) {
3594                 *pinfo = info;
3595         }
3596
3597         smb_fname->st = fsp->fsp_name->st;
3598
3599         return NT_STATUS_OK;
3600
3601  fail:
3602         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3603
3604         if (fsp != NULL) {
3605                 if (base_fsp && fsp->base_fsp == base_fsp) {
3606                         /*
3607                          * The close_file below will close
3608                          * fsp->base_fsp.
3609                          */
3610                         base_fsp = NULL;
3611                 }
3612                 close_file(req, fsp, ERROR_CLOSE);
3613                 fsp = NULL;
3614         }
3615         if (base_fsp != NULL) {
3616                 close_file(req, base_fsp, ERROR_CLOSE);
3617                 base_fsp = NULL;
3618         }
3619         return status;
3620 }
3621
3622 /*
3623  * Calculate the full path name given a relative fid.
3624  */
3625 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3626                                    struct smb_request *req,
3627                                    uint16_t root_dir_fid,
3628                                    const struct smb_filename *smb_fname,
3629                                    struct smb_filename **smb_fname_out)
3630 {
3631         files_struct *dir_fsp;
3632         char *parent_fname = NULL;
3633         char *new_base_name = NULL;
3634         NTSTATUS status;
3635
3636         if (root_dir_fid == 0 || !smb_fname) {
3637                 status = NT_STATUS_INTERNAL_ERROR;
3638                 goto out;
3639         }
3640
3641         dir_fsp = file_fsp(req, root_dir_fid);
3642
3643         if (dir_fsp == NULL) {
3644                 status = NT_STATUS_INVALID_HANDLE;
3645                 goto out;
3646         }
3647
3648         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3649                 status = NT_STATUS_INVALID_HANDLE;
3650                 goto out;
3651         }
3652
3653         if (!dir_fsp->is_directory) {
3654
3655                 /*
3656                  * Check to see if this is a mac fork of some kind.
3657                  */
3658
3659                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3660                     is_ntfs_stream_smb_fname(smb_fname)) {
3661                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3662                         goto out;
3663                 }
3664
3665                 /*
3666                   we need to handle the case when we get a
3667                   relative open relative to a file and the
3668                   pathname is blank - this is a reopen!
3669                   (hint from demyn plantenberg)
3670                 */
3671
3672                 status = NT_STATUS_INVALID_HANDLE;
3673                 goto out;
3674         }
3675
3676         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3677                 /*
3678                  * We're at the toplevel dir, the final file name
3679                  * must not contain ./, as this is filtered out
3680                  * normally by srvstr_get_path and unix_convert
3681                  * explicitly rejects paths containing ./.
3682                  */
3683                 parent_fname = talloc_strdup(talloc_tos(), "");
3684                 if (parent_fname == NULL) {
3685                         status = NT_STATUS_NO_MEMORY;
3686                         goto out;
3687                 }
3688         } else {
3689                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3690
3691                 /*
3692                  * Copy in the base directory name.
3693                  */
3694
3695                 parent_fname = talloc_array(talloc_tos(), char,
3696                     dir_name_len+2);
3697                 if (parent_fname == NULL) {
3698                         status = NT_STATUS_NO_MEMORY;
3699                         goto out;
3700                 }
3701                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3702                     dir_name_len+1);
3703
3704                 /*
3705                  * Ensure it ends in a '/'.
3706                  * We used TALLOC_SIZE +2 to add space for the '/'.
3707                  */
3708
3709                 if(dir_name_len
3710                     && (parent_fname[dir_name_len-1] != '\\')
3711                     && (parent_fname[dir_name_len-1] != '/')) {
3712                         parent_fname[dir_name_len] = '/';
3713                         parent_fname[dir_name_len+1] = '\0';
3714                 }
3715         }
3716
3717         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3718                                         smb_fname->base_name);
3719         if (new_base_name == NULL) {
3720                 status = NT_STATUS_NO_MEMORY;
3721                 goto out;
3722         }
3723
3724         status = filename_convert(req,
3725                                 conn,
3726                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3727                                 new_base_name,
3728                                 0,
3729                                 NULL,
3730                                 smb_fname_out);
3731         if (!NT_STATUS_IS_OK(status)) {
3732                 goto out;
3733         }
3734
3735  out:
3736         TALLOC_FREE(parent_fname);
3737         TALLOC_FREE(new_base_name);
3738         return status;
3739 }
3740
3741 NTSTATUS create_file_default(connection_struct *conn,
3742                              struct smb_request *req,
3743                              uint16_t root_dir_fid,
3744                              struct smb_filename *smb_fname,
3745                              uint32_t access_mask,
3746                              uint32_t share_access,
3747                              uint32_t create_disposition,
3748                              uint32_t create_options,
3749                              uint32_t file_attributes,
3750                              uint32_t oplock_request,
3751                              uint64_t allocation_size,
3752                              uint32_t private_flags,
3753                              struct security_descriptor *sd,
3754                              struct ea_list *ea_list,
3755                              files_struct **result,
3756                              int *pinfo)
3757 {
3758         int info = FILE_WAS_OPENED;
3759         files_struct *fsp = NULL;
3760         NTSTATUS status;
3761         bool stream_name = false;
3762
3763         DEBUG(10,("create_file: access_mask = 0x%x "
3764                   "file_attributes = 0x%x, share_access = 0x%x, "
3765                   "create_disposition = 0x%x create_options = 0x%x "
3766                   "oplock_request = 0x%x "
3767                   "private_flags = 0x%x "
3768                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3769                   "fname = %s\n",
3770                   (unsigned int)access_mask,
3771                   (unsigned int)file_attributes,
3772                   (unsigned int)share_access,
3773                   (unsigned int)create_disposition,
3774                   (unsigned int)create_options,
3775                   (unsigned int)oplock_request,
3776                   (unsigned int)private_flags,
3777                   (unsigned int)root_dir_fid,
3778                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3779
3780         /*
3781          * Calculate the filename from the root_dir_if if necessary.
3782          */
3783
3784         if (root_dir_fid != 0) {
3785                 struct smb_filename *smb_fname_out = NULL;
3786                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3787                                                    smb_fname, &smb_fname_out);
3788                 if (!NT_STATUS_IS_OK(status)) {
3789                         goto fail;
3790                 }
3791                 smb_fname = smb_fname_out;
3792         }
3793
3794         /*
3795          * Check to see if this is a mac fork of some kind.
3796          */
3797
3798         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3799         if (stream_name) {
3800                 enum FAKE_FILE_TYPE fake_file_type;
3801
3802                 fake_file_type = is_fake_file(smb_fname);
3803
3804                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3805
3806                         /*
3807                          * Here we go! support for changing the disk quotas
3808                          * --metze
3809                          *
3810                          * We need to fake up to open this MAGIC QUOTA file
3811                          * and return a valid FID.
3812                          *
3813                          * w2k close this file directly after openening xp
3814                          * also tries a QUERY_FILE_INFO on the file and then
3815                          * close it
3816                          */
3817                         status = open_fake_file(req, conn, req->vuid,
3818                                                 fake_file_type, smb_fname,
3819                                                 access_mask, &fsp);
3820                         if (!NT_STATUS_IS_OK(status)) {
3821                                 goto fail;
3822                         }
3823
3824                         ZERO_STRUCT(smb_fname->st);
3825                         goto done;
3826                 }
3827
3828                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3829                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3830                         goto fail;
3831                 }
3832         }
3833
3834         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3835                 int ret;
3836                 smb_fname->stream_name = NULL;
3837                 /* We have to handle this error here. */
3838                 if (create_options & FILE_DIRECTORY_FILE) {
3839                         status = NT_STATUS_NOT_A_DIRECTORY;
3840                         goto fail;
3841                 }
3842                 if (lp_posix_pathnames()) {
3843                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3844                 } else {
3845                         ret = SMB_VFS_STAT(conn, smb_fname);
3846                 }
3847
3848                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3849                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3850                         goto fail;
3851                 }
3852         }
3853
3854         status = create_file_unixpath(
3855                 conn, req, smb_fname, access_mask, share_access,
3856                 create_disposition, create_options, file_attributes,
3857                 oplock_request, allocation_size, private_flags,
3858                 sd, ea_list,
3859                 &fsp, &info);
3860
3861         if (!NT_STATUS_IS_OK(status)) {
3862                 goto fail;
3863         }
3864
3865  done:
3866         DEBUG(10, ("create_file: info=%d\n", info));
3867
3868         *result = fsp;
3869         if (pinfo != NULL) {
3870                 *pinfo = info;
3871         }
3872         return NT_STATUS_OK;
3873
3874  fail:
3875         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3876
3877         if (fsp != NULL) {
3878                 close_file(req, fsp, ERROR_CLOSE);
3879                 fsp = NULL;
3880         }
3881         return status;
3882 }