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 "../librpc/gen_ndr/idmap.h"
  32 #include "passdb/lookup_sid.h"
  33 #include "auth.h"
  34 #include "serverid.h"
  35 #include "messages.h"
  36 #include "source3/lib/dbwrap/dbwrap_watch.h"
  37
  38 extern const struct generic_mapping file_generic_mapping;
  39
  40 struct deferred_open_record {
  41         bool delayed_for_oplocks;
  42         bool async_open;
  43         struct file_id id;
  44 };
  45
  46 /****************************************************************************
  47  If the requester wanted DELETE_ACCESS and was rejected because
  48  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  49  overrides this.
  50 ****************************************************************************/
  51
  52 static bool parent_override_delete(connection_struct *conn,
  53                                         const struct smb_filename *smb_fname,
  54                                         uint32_t access_mask,
  55                                         uint32_t rejected_mask)
  56 {
  57         if ((access_mask & DELETE_ACCESS) &&
  58                     (rejected_mask & DELETE_ACCESS) &&
  59                     can_delete_file_in_directory(conn, smb_fname)) {
  60                 return true;
  61         }
  62         return false;
  63 }
  64
  65 /****************************************************************************
  66  Check if we have open rights.
  67 ****************************************************************************/
  68
  69 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  70                                 const struct smb_filename *smb_fname,
  71                                 bool use_privs,
  72                                 uint32_t access_mask)
  73 {
  74         /* Check if we have rights to open. */
  75         NTSTATUS status;
  76         struct security_descriptor *sd = NULL;
  77         uint32_t rejected_share_access;
  78         uint32_t rejected_mask = access_mask;
  79         uint32_t do_not_check_mask = 0;
  80
  81         rejected_share_access = access_mask & ~(conn->share_access);
  82
  83         if (rejected_share_access) {
  84                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  85                         "on %s (0x%x)\n",
  86                         (unsigned int)access_mask,
  87                         smb_fname_str_dbg(smb_fname),
  88                         (unsigned int)rejected_share_access ));
  89                 return NT_STATUS_ACCESS_DENIED;
  90         }
  91
  92         if (!use_privs && get_current_uid(conn) == (uid_t)0) {
  93                 /* I'm sorry sir, I didn't know you were root... */
  94                 DEBUG(10,("smbd_check_access_rights: root override "
  95                         "on %s. Granting 0x%x\n",
  96                         smb_fname_str_dbg(smb_fname),
  97                         (unsigned int)access_mask ));
  98                 return NT_STATUS_OK;
  99         }
 100
 101         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
 102                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 103                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
 104                         smb_fname_str_dbg(smb_fname),
 105                         (unsigned int)access_mask ));
 106                 return NT_STATUS_OK;
 107         }
 108
 109         if (access_mask == DELETE_ACCESS &&
 110                         VALID_STAT(smb_fname->st) &&
 111                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 112                 /* We can always delete a symlink. */
 113                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 114                         "on DELETE_ACCESS on symlink %s.\n",
 115                         smb_fname_str_dbg(smb_fname) ));
 116                 return NT_STATUS_OK;
 117         }
 118
 119         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 120                         (SECINFO_OWNER |
 121                         SECINFO_GROUP |
 122                          SECINFO_DACL), talloc_tos(), &sd);
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 126                         "on %s: %s\n",
 127                         smb_fname_str_dbg(smb_fname),
 128                         nt_errstr(status)));
 129
 130                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 131                         goto access_denied;
 132                 }
 133
 134                 return status;
 135         }
 136
 137         /*
 138          * If we can access the path to this file, by
 139          * default we have FILE_READ_ATTRIBUTES from the
 140          * containing directory. See the section:
 141          * "Algorithm to Check Access to an Existing File"
 142          * in MS-FSA.pdf.
 143          *
 144          * se_file_access_check() also takes care of
 145          * owner WRITE_DAC and READ_CONTROL.
 146          */
 147         do_not_check_mask = FILE_READ_ATTRIBUTES;
 148
 149         /*
 150          * Samba 3.6 and earlier granted execute access even
 151          * if the ACL did not contain execute rights.
 152          * Samba 4.0 is more correct and checks it.
 153          * The compatibilty mode allows to skip this check
 154          * to smoothen upgrades.
 155          */
 156         if (lp_acl_allow_execute_always(SNUM(conn))) {
 157                 do_not_check_mask |= FILE_EXECUTE;
 158         }
 159
 160         status = se_file_access_check(sd,
 161                                 get_current_nttok(conn),
 162                                 use_privs,
 163                                 (access_mask & ~do_not_check_mask),
 164                                 &rejected_mask);
 165
 166         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 167                 "0x%x returning 0x%x (%s)\n",
 168                 smb_fname_str_dbg(smb_fname),
 169                 (unsigned int)access_mask,
 170                 (unsigned int)rejected_mask,
 171                 nt_errstr(status) ));
 172
 173         if (!NT_STATUS_IS_OK(status)) {
 174                 if (DEBUGLEVEL >= 10) {
 175                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 176                                 smb_fname_str_dbg(smb_fname) ));
 177                         NDR_PRINT_DEBUG(security_descriptor, sd);
 178                 }
 179         }
 180
 181         TALLOC_FREE(sd);
 182
 183         if (NT_STATUS_IS_OK(status) ||
 184                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 185                 return status;
 186         }
 187
 188         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 189
 190   access_denied:
 191
 192         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 193                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 194                         !lp_store_dos_attributes(SNUM(conn)) &&
 195                         (lp_map_readonly(SNUM(conn)) ||
 196                         lp_map_archive(SNUM(conn)) ||
 197                         lp_map_hidden(SNUM(conn)) ||
 198                         lp_map_system(SNUM(conn)))) {
 199                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 200
 201                 DEBUG(10,("smbd_check_access_rights: "
 202                         "overrode "
 203                         "FILE_WRITE_ATTRIBUTES "
 204                         "on file %s\n",
 205                         smb_fname_str_dbg(smb_fname)));
 206         }
 207
 208         if (parent_override_delete(conn,
 209                                 smb_fname,
 210                                 access_mask,
 211                                 rejected_mask)) {
 212                 /* Were we trying to do an open
 213                  * for delete and didn't get DELETE
 214                  * access (only) ? Check if the
 215                  * directory allows DELETE_CHILD.
 216                  * See here:
 217                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 218                  * for details. */
 219
 220                 rejected_mask &= ~DELETE_ACCESS;
 221
 222                 DEBUG(10,("smbd_check_access_rights: "
 223                         "overrode "
 224                         "DELETE_ACCESS on "
 225                         "file %s\n",
 226                         smb_fname_str_dbg(smb_fname)));
 227         }
 228
 229         if (rejected_mask != 0) {
 230                 return NT_STATUS_ACCESS_DENIED;
 231         }
 232         return NT_STATUS_OK;
 233 }
 234
 235 static NTSTATUS check_parent_access(struct connection_struct *conn,
 236                                 struct smb_filename *smb_fname,
 237                                 uint32_t access_mask)
 238 {
 239         NTSTATUS status;
 240         char *parent_dir = NULL;
 241         struct security_descriptor *parent_sd = NULL;
 242         uint32_t access_granted = 0;
 243
 244         if (!parent_dirname(talloc_tos(),
 245                                 smb_fname->base_name,
 246                                 &parent_dir,
 247                                 NULL)) {
 248                 return NT_STATUS_NO_MEMORY;
 249         }
 250
 251         if (get_current_uid(conn) == (uid_t)0) {
 252                 /* I'm sorry sir, I didn't know you were root... */
 253                 DEBUG(10,("check_parent_access: root override "
 254                         "on %s. Granting 0x%x\n",
 255                         smb_fname_str_dbg(smb_fname),
 256                         (unsigned int)access_mask ));
 257                 return NT_STATUS_OK;
 258         }
 259
 260         status = SMB_VFS_GET_NT_ACL(conn,
 261                                 parent_dir,
 262                                 SECINFO_DACL,
 263                                     talloc_tos(),
 264                                 &parent_sd);
 265
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 268                         "%s with error %s\n",
 269                         parent_dir,
 270                         nt_errstr(status)));
 271                 return status;
 272         }
 273
 274         /*
 275          * If we can access the path to this file, by
 276          * default we have FILE_READ_ATTRIBUTES from the
 277          * containing directory. See the section:
 278          * "Algorithm to Check Access to an Existing File"
 279          * in MS-FSA.pdf.
 280          *
 281          * se_file_access_check() also takes care of
 282          * owner WRITE_DAC and READ_CONTROL.
 283          */
 284         status = se_file_access_check(parent_sd,
 285                                 get_current_nttok(conn),
 286                                 false,
 287                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 288                                 &access_granted);
 289         if(!NT_STATUS_IS_OK(status)) {
 290                 DEBUG(5,("check_parent_access: access check "
 291                         "on directory %s for "
 292                         "path %s for mask 0x%x returned (0x%x) %s\n",
 293                         parent_dir,
 294                         smb_fname->base_name,
 295                         access_mask,
 296                         access_granted,
 297                         nt_errstr(status) ));
 298                 return status;
 299         }
 300
 301         return NT_STATUS_OK;
 302 }
 303
 304 /****************************************************************************
 305  fd support routines - attempt to do a dos_open.
 306 ****************************************************************************/
 307
 308 NTSTATUS fd_open(struct connection_struct *conn,
 309                  files_struct *fsp,
 310                  int flags,
 311                  mode_t mode)
 312 {
 313         struct smb_filename *smb_fname = fsp->fsp_name;
 314         NTSTATUS status = NT_STATUS_OK;
 315
 316 #ifdef O_NOFOLLOW
 317         /*
 318          * Never follow symlinks on a POSIX client. The
 319          * client should be doing this.
 320          */
 321
 322         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 323                 flags |= O_NOFOLLOW;
 324         }
 325 #endif
 326
 327         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 328         if (fsp->fh->fd == -1) {
 329                 int posix_errno = errno;
 330 #ifdef O_NOFOLLOW
 331 #if defined(ENOTSUP) && defined(OSF1)
 332                 /* handle special Tru64 errno */
 333                 if (errno == ENOTSUP) {
 334                         posix_errno = ELOOP;
 335                 }
 336 #endif /* ENOTSUP */
 337 #ifdef EFTYPE
 338                 /* fix broken NetBSD errno */
 339                 if (errno == EFTYPE) {
 340                         posix_errno = ELOOP;
 341                 }
 342 #endif /* EFTYPE */
 343                 /* fix broken FreeBSD errno */
 344                 if (errno == EMLINK) {
 345                         posix_errno = ELOOP;
 346                 }
 347 #endif /* O_NOFOLLOW */
 348                 status = map_nt_error_from_unix(posix_errno);
 349                 if (errno == EMFILE) {
 350                         static time_t last_warned = 0L;
 351
 352                         if (time((time_t *) NULL) > last_warned) {
 353                                 DEBUG(0,("Too many open files, unable "
 354                                         "to open more!  smbd's max "
 355                                         "open files = %d\n",
 356                                         lp_max_open_files()));
 357                                 last_warned = time((time_t *) NULL);
 358                         }
 359                 }
 360
 361         }
 362
 363         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 364                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 365                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 366
 367         return status;
 368 }
 369
 370 /****************************************************************************
 371  Close the file associated with a fsp.
 372 ****************************************************************************/
 373
 374 NTSTATUS fd_close(files_struct *fsp)
 375 {
 376         int ret;
 377
 378         if (fsp->dptr) {
 379                 dptr_CloseDir(fsp);
 380         }
 381         if (fsp->fh->fd == -1) {
 382                 return NT_STATUS_OK; /* What we used to call a stat open. */
 383         }
 384         if (fsp->fh->ref_count > 1) {
 385                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 386         }
 387
 388         ret = SMB_VFS_CLOSE(fsp);
 389         fsp->fh->fd = -1;
 390         if (ret == -1) {
 391                 return map_nt_error_from_unix(errno);
 392         }
 393         return NT_STATUS_OK;
 394 }
 395
 396 /****************************************************************************
 397  Change the ownership of a file to that of the parent directory.
 398  Do this by fd if possible.
 399 ****************************************************************************/
 400
 401 void change_file_owner_to_parent(connection_struct *conn,
 402                                         const char *inherit_from_dir,
 403                                         files_struct *fsp)
 404 {
 405         struct smb_filename *smb_fname_parent;
 406         int ret;
 407
 408         smb_fname_parent = synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 409                                                NULL, NULL);
 410         if (smb_fname_parent == NULL) {
 411                 return;
 412         }
 413
 414         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 415         if (ret == -1) {
 416                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 417                          "directory %s. Error was %s\n",
 418                          smb_fname_str_dbg(smb_fname_parent),
 419                          strerror(errno)));
 420                 TALLOC_FREE(smb_fname_parent);
 421                 return;
 422         }
 423
 424         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 425                 /* Already this uid - no need to change. */
 426                 DEBUG(10,("change_file_owner_to_parent: file %s "
 427                         "is already owned by uid %d\n",
 428                         fsp_str_dbg(fsp),
 429                         (int)fsp->fsp_name->st.st_ex_uid ));
 430                 TALLOC_FREE(smb_fname_parent);
 431                 return;
 432         }
 433
 434         become_root();
 435         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 436         unbecome_root();
 437         if (ret == -1) {
 438                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 439                          "file %s to parent directory uid %u. Error "
 440                          "was %s\n", fsp_str_dbg(fsp),
 441                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 442                          strerror(errno) ));
 443         } else {
 444                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 445                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 446                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 447                 /* Ensure the uid entry is updated. */
 448                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 449         }
 450
 451         TALLOC_FREE(smb_fname_parent);
 452 }
 453
 454 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 455                                        const char *inherit_from_dir,
 456                                        const char *fname,
 457                                        SMB_STRUCT_STAT *psbuf)
 458 {
 459         struct smb_filename *smb_fname_parent;
 460         struct smb_filename *smb_fname_cwd = NULL;
 461         char *saved_dir = NULL;
 462         TALLOC_CTX *ctx = talloc_tos();
 463         NTSTATUS status = NT_STATUS_OK;
 464         int ret;
 465
 466         smb_fname_parent = synthetic_smb_fname(ctx, inherit_from_dir,
 467                                                NULL, NULL);
 468         if (smb_fname_parent == NULL) {
 469                 return NT_STATUS_NO_MEMORY;
 470         }
 471
 472         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 473         if (ret == -1) {
 474                 status = map_nt_error_from_unix(errno);
 475                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 476                          "directory %s. Error was %s\n",
 477                          smb_fname_str_dbg(smb_fname_parent),
 478                          strerror(errno)));
 479                 goto out;
 480         }
 481
 482         /* We've already done an lstat into psbuf, and we know it's a
 483            directory. If we can cd into the directory and the dev/ino
 484            are the same then we can safely chown without races as
 485            we're locking the directory in place by being in it.  This
 486            should work on any UNIX (thanks tridge :-). JRA.
 487         */
 488
 489         saved_dir = vfs_GetWd(ctx,conn);
 490         if (!saved_dir) {
 491                 status = map_nt_error_from_unix(errno);
 492                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 493                          "current working directory. Error was %s\n",
 494                          strerror(errno)));
 495                 goto out;
 496         }
 497
 498         /* Chdir into the new path. */
 499         if (vfs_ChDir(conn, fname) == -1) {
 500                 status = map_nt_error_from_unix(errno);
 501                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 502                          "current working directory to %s. Error "
 503                          "was %s\n", fname, strerror(errno) ));
 504                 goto chdir;
 505         }
 506
 507         smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL);
 508         if (smb_fname_cwd == NULL) {
 509                 status = NT_STATUS_NO_MEMORY;
 510                 goto chdir;
 511         }
 512
 513         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 514         if (ret == -1) {
 515                 status = map_nt_error_from_unix(errno);
 516                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 517                          "directory '.' (%s) Error was %s\n",
 518                          fname, strerror(errno)));
 519                 goto chdir;
 520         }
 521
 522         /* Ensure we're pointing at the same place. */
 523         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 524             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 525                 DEBUG(0,("change_dir_owner_to_parent: "
 526                          "device/inode on directory %s changed. "
 527                          "Refusing to chown !\n", fname ));
 528                 status = NT_STATUS_ACCESS_DENIED;
 529                 goto chdir;
 530         }
 531
 532         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 533                 /* Already this uid - no need to change. */
 534                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 535                         "is already owned by uid %d\n",
 536                         fname,
 537                         (int)smb_fname_cwd->st.st_ex_uid ));
 538                 status = NT_STATUS_OK;
 539                 goto chdir;
 540         }
 541
 542         become_root();
 543         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 544                             (gid_t)-1);
 545         unbecome_root();
 546         if (ret == -1) {
 547                 status = map_nt_error_from_unix(errno);
 548                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 549                           "directory %s to parent directory uid %u. "
 550                           "Error was %s\n", fname,
 551                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 552                           strerror(errno) ));
 553         } else {
 554                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 555                         "directory %s to parent directory uid %u.\n",
 556                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 557                 /* Ensure the uid entry is updated. */
 558                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 559         }
 560
 561  chdir:
 562         vfs_ChDir(conn,saved_dir);
 563  out:
 564         TALLOC_FREE(smb_fname_parent);
 565         TALLOC_FREE(smb_fname_cwd);
 566         return status;
 567 }
 568
 569 /****************************************************************************
 570  Open a file - returning a guaranteed ATOMIC indication of if the
 571  file was created or not.
 572 ****************************************************************************/
 573
 574 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
 575                         files_struct *fsp,
 576                         int flags,
 577                         mode_t mode,
 578                         bool *file_created)
 579 {
 580         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 581         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 582
 583         *file_created = false;
 584
 585         if (!(flags & O_CREAT)) {
 586                 /*
 587                  * We're not creating the file, just pass through.
 588                  */
 589                 return fd_open(conn, fsp, flags, mode);
 590         }
 591
 592         if (flags & O_EXCL) {
 593                 /*
 594                  * Fail if already exists, just pass through.
 595                  */
 596                 status = fd_open(conn, fsp, flags, mode);
 597
 598                 /*
 599                  * Here we've opened with O_CREAT|O_EXCL. If that went
 600                  * NT_STATUS_OK, we *know* we created this file.
 601                  */
 602                 *file_created = NT_STATUS_IS_OK(status);
 603
 604                 return status;
 605         }
 606
 607         /*
 608          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
 609          * To know absolutely if we created the file or not,
 610          * we can never call O_CREAT without O_EXCL. So if
 611          * we think the file existed, try without O_CREAT|O_EXCL.
 612          * If we think the file didn't exist, try with
 613          * O_CREAT|O_EXCL. Keep bouncing between these two
 614          * requests until either the file is created, or
 615          * opened. Either way, we keep going until we get
 616          * a returnable result (error, or open/create).
 617          */
 618
 619         while(1) {
 620                 int curr_flags = flags;
 621
 622                 if (file_existed) {
 623                         /* Just try open, do not create. */
 624                         curr_flags &= ~(O_CREAT);
 625                         status = fd_open(conn, fsp, curr_flags, mode);
 626                         if (NT_STATUS_EQUAL(status,
 627                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 628                                 /*
 629                                  * Someone deleted it in the meantime.
 630                                  * Retry with O_EXCL.
 631                                  */
 632                                 file_existed = false;
 633                                 DEBUG(10,("fd_open_atomic: file %s existed. "
 634                                         "Retry.\n",
 635                                         smb_fname_str_dbg(fsp->fsp_name)));
 636                                         continue;
 637                         }
 638                 } else {
 639                         /* Try create exclusively, fail if it exists. */
 640                         curr_flags |= O_EXCL;
 641                         status = fd_open(conn, fsp, curr_flags, mode);
 642                         if (NT_STATUS_EQUAL(status,
 643                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
 644                                 /*
 645                                  * Someone created it in the meantime.
 646                                  * Retry without O_CREAT.
 647                                  */
 648                                 file_existed = true;
 649                                 DEBUG(10,("fd_open_atomic: file %s "
 650                                         "did not exist. Retry.\n",
 651                                         smb_fname_str_dbg(fsp->fsp_name)));
 652                                 continue;
 653                         }
 654                         if (NT_STATUS_IS_OK(status)) {
 655                                 /*
 656                                  * Here we've opened with O_CREAT|O_EXCL
 657                                  * and got success. We *know* we created
 658                                  * this file.
 659                                  */
 660                                 *file_created = true;
 661                         }
 662                 }
 663                 /* Create is done, or failed. */
 664                 break;
 665         }
 666         return status;
 667 }
 668
 669 /****************************************************************************
 670  Open a file.
 671 ****************************************************************************/
 672
 673 static NTSTATUS open_file(files_struct *fsp,
 674                           connection_struct *conn,
 675                           struct smb_request *req,
 676                           const char *parent_dir,
 677                           int flags,
 678                           mode_t unx_mode,
 679                           uint32 access_mask, /* client requested access mask. */
 680                           uint32 open_access_mask, /* what we're actually using in the open. */
 681                           bool *p_file_created)
 682 {
 683         struct smb_filename *smb_fname = fsp->fsp_name;
 684         NTSTATUS status = NT_STATUS_OK;
 685         int accmode = (flags & O_ACCMODE);
 686         int local_flags = flags;
 687         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 688
 689         fsp->fh->fd = -1;
 690         errno = EPERM;
 691
 692         /* Check permissions */
 693
 694         /*
 695          * This code was changed after seeing a client open request
 696          * containing the open mode of (DENY_WRITE/read-only) with
 697          * the 'create if not exist' bit set. The previous code
 698          * would fail to open the file read only on a read-only share
 699          * as it was checking the flags parameter  directly against O_RDONLY,
 700          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 701          * JRA.
 702          */
 703
 704         if (!CAN_WRITE(conn)) {
 705                 /* It's a read-only share - fail if we wanted to write. */
 706                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 707                         DEBUG(3,("Permission denied opening %s\n",
 708                                  smb_fname_str_dbg(smb_fname)));
 709                         return NT_STATUS_ACCESS_DENIED;
 710                 }
 711                 if (flags & O_CREAT) {
 712                         /* We don't want to write - but we must make sure that
 713                            O_CREAT doesn't create the file if we have write
 714                            access into the directory.
 715                         */
 716                         flags &= ~(O_CREAT|O_EXCL);
 717                         local_flags &= ~(O_CREAT|O_EXCL);
 718                 }
 719         }
 720
 721         /*
 722          * This little piece of insanity is inspired by the
 723          * fact that an NT client can open a file for O_RDONLY,
 724          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 725          * If the client *can* write to the file, then it expects to
 726          * truncate the file, even though it is opening for readonly.
 727          * Quicken uses this stupid trick in backup file creation...
 728          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 729          * for helping track this one down. It didn't bite us in 2.0.x
 730          * as we always opened files read-write in that release. JRA.
 731          */
 732
 733         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 734                 DEBUG(10,("open_file: truncate requested on read-only open "
 735                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 736                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 737         }
 738
 739         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 740             (!file_existed && (local_flags & O_CREAT)) ||
 741             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 742                 const char *wild;
 743                 int ret;
 744
 745 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 746                 /*
 747                  * We would block on opening a FIFO with no one else on the
 748                  * other end. Do what we used to do and add O_NONBLOCK to the
 749                  * open flags. JRA.
 750                  */
 751
 752                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 753                         local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
 754                         local_flags |= O_NONBLOCK;
 755                 }
 756 #endif
 757
 758                 /* Don't create files with Microsoft wildcard characters. */
 759                 if (fsp->base_fsp) {
 760                         /*
 761                          * wildcard characters are allowed in stream names
 762                          * only test the basefilename
 763                          */
 764                         wild = fsp->base_fsp->fsp_name->base_name;
 765                 } else {
 766                         wild = smb_fname->base_name;
 767                 }
 768                 if ((local_flags & O_CREAT) && !file_existed &&
 769                     ms_has_wild(wild))  {
 770                         return NT_STATUS_OBJECT_NAME_INVALID;
 771                 }
 772
 773                 /* Can we access this file ? */
 774                 if (!fsp->base_fsp) {
 775                         /* Only do this check on non-stream open. */
 776                         if (file_existed) {
 777                                 status = smbd_check_access_rights(conn,
 778                                                 smb_fname,
 779                                                 false,
 780                                                 access_mask);
 781                         } else if (local_flags & O_CREAT){
 782                                 status = check_parent_access(conn,
 783                                                 smb_fname,
 784                                                 SEC_DIR_ADD_FILE);
 785                         } else {
 786                                 /* File didn't exist and no O_CREAT. */
 787                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 788                         }
 789                         if (!NT_STATUS_IS_OK(status)) {
 790                                 DEBUG(10,("open_file: "
 791                                         "%s on file "
 792                                         "%s returned %s\n",
 793                                         file_existed ?
 794                                                 "smbd_check_access_rights" :
 795                                                 "check_parent_access",
 796                                         smb_fname_str_dbg(smb_fname),
 797                                         nt_errstr(status) ));
 798                                 return status;
 799                         }
 800                 }
 801
 802                 /* Actually do the open */
 803                 status = fd_open_atomic(conn, fsp, local_flags,
 804                                 unx_mode, p_file_created);
 805                 if (!NT_STATUS_IS_OK(status)) {
 806                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 807                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 808                                  nt_errstr(status),local_flags,flags));
 809                         return status;
 810                 }
 811
 812                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 813                 if (ret == -1) {
 814                         /* If we have an fd, this stat should succeed. */
 815                         DEBUG(0,("Error doing fstat on open file %s "
 816                                 "(%s)\n",
 817                                 smb_fname_str_dbg(smb_fname),
 818                                 strerror(errno) ));
 819                         status = map_nt_error_from_unix(errno);
 820                         fd_close(fsp);
 821                         return status;
 822                 }
 823
 824                 if (*p_file_created) {
 825                         /* We created this file. */
 826
 827                         bool need_re_stat = false;
 828                         /* Do all inheritance work after we've
 829                            done a successful fstat call and filled
 830                            in the stat struct in fsp->fsp_name. */
 831
 832                         /* Inherit the ACL if required */
 833                         if (lp_inherit_perms(SNUM(conn))) {
 834                                 inherit_access_posix_acl(conn, parent_dir,
 835                                                          smb_fname->base_name,
 836                                                          unx_mode);
 837                                 need_re_stat = true;
 838                         }
 839
 840                         /* Change the owner if required. */
 841                         if (lp_inherit_owner(SNUM(conn))) {
 842                                 change_file_owner_to_parent(conn, parent_dir,
 843                                                             fsp);
 844                                 need_re_stat = true;
 845                         }
 846
 847                         if (need_re_stat) {
 848                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 849                                 /* If we have an fd, this stat should succeed. */
 850                                 if (ret == -1) {
 851                                         DEBUG(0,("Error doing fstat on open file %s "
 852                                                  "(%s)\n",
 853                                                  smb_fname_str_dbg(smb_fname),
 854                                                  strerror(errno) ));
 855                                 }
 856                         }
 857
 858                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 859                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 860                                      smb_fname->base_name);
 861                 }
 862         } else {
 863                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 864                 if (!file_existed) {
 865                         /* File must exist for a stat open. */
 866                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 867                 }
 868
 869                 status = smbd_check_access_rights(conn,
 870                                 smb_fname,
 871                                 false,
 872                                 access_mask);
 873
 874                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 875                                 fsp->posix_open &&
 876                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 877                         /* This is a POSIX stat open for delete
 878                          * or rename on a symlink that points
 879                          * nowhere. Allow. */
 880                         DEBUG(10,("open_file: allowing POSIX "
 881                                   "open on bad symlink %s\n",
 882                                   smb_fname_str_dbg(smb_fname)));
 883                         status = NT_STATUS_OK;
 884                 }
 885
 886                 if (!NT_STATUS_IS_OK(status)) {
 887                         DEBUG(10,("open_file: "
 888                                 "smbd_check_access_rights on file "
 889                                 "%s returned %s\n",
 890                                 smb_fname_str_dbg(smb_fname),
 891                                 nt_errstr(status) ));
 892                         return status;
 893                 }
 894         }
 895
 896         /*
 897          * POSIX allows read-only opens of directories. We don't
 898          * want to do this (we use a different code path for this)
 899          * so catch a directory open and return an EISDIR. JRA.
 900          */
 901
 902         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 903                 fd_close(fsp);
 904                 errno = EISDIR;
 905                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 906         }
 907
 908         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 909         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 910         fsp->file_pid = req ? req->smbpid : 0;
 911         fsp->can_lock = True;
 912         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
 913         fsp->can_write =
 914                 CAN_WRITE(conn) &&
 915                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
 916         fsp->print_file = NULL;
 917         fsp->modified = False;
 918         fsp->sent_oplock_break = NO_BREAK_SENT;
 919         fsp->is_directory = False;
 920         if (conn->aio_write_behind_list &&
 921             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 922                        conn->case_sensitive)) {
 923                 fsp->aio_write_behind = True;
 924         }
 925
 926         fsp->wcp = NULL; /* Write cache pointer. */
 927
 928         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 929                  conn->session_info->unix_info->unix_name,
 930                  smb_fname_str_dbg(smb_fname),
 931                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 932                  conn->num_files_open));
 933
 934         errno = 0;
 935         return NT_STATUS_OK;
 936 }
 937
 938 /****************************************************************************
 939  Check if we can open a file with a share mode.
 940  Returns True if conflict, False if not.
 941 ****************************************************************************/
 942
 943 static bool share_conflict(struct share_mode_entry *entry,
 944                            uint32 access_mask,
 945                            uint32 share_access)
 946 {
 947         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 948                   "entry->share_access = 0x%x, "
 949                   "entry->private_options = 0x%x\n",
 950                   (unsigned int)entry->access_mask,
 951                   (unsigned int)entry->share_access,
 952                   (unsigned int)entry->private_options));
 953
 954         if (server_id_is_disconnected(&entry->pid)) {
 955                 /*
 956                  * note: cleanup should have been done by
 957                  * delay_for_batch_oplocks()
 958                  */
 959                 return false;
 960         }
 961
 962         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 963                   (unsigned int)access_mask, (unsigned int)share_access));
 964
 965         if ((entry->access_mask & (FILE_WRITE_DATA|
 966                                    FILE_APPEND_DATA|
 967                                    FILE_READ_DATA|
 968                                    FILE_EXECUTE|
 969                                    DELETE_ACCESS)) == 0) {
 970                 DEBUG(10,("share_conflict: No conflict due to "
 971                           "entry->access_mask = 0x%x\n",
 972                           (unsigned int)entry->access_mask ));
 973                 return False;
 974         }
 975
 976         if ((access_mask & (FILE_WRITE_DATA|
 977                             FILE_APPEND_DATA|
 978                             FILE_READ_DATA|
 979                             FILE_EXECUTE|
 980                             DELETE_ACCESS)) == 0) {
 981                 DEBUG(10,("share_conflict: No conflict due to "
 982                           "access_mask = 0x%x\n",
 983                           (unsigned int)access_mask ));
 984                 return False;
 985         }
 986
 987 #if 1 /* JRA TEST - Superdebug. */
 988 #define CHECK_MASK(num, am, right, sa, share) \
 989         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 990                 (unsigned int)(num), (unsigned int)(am), \
 991                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 992         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 993                 (unsigned int)(num), (unsigned int)(sa), \
 994                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 995         if (((am) & (right)) && !((sa) & (share))) { \
 996                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 997 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 998                         (unsigned int)(share) )); \
 999                 return True; \
1000         }
1001 #else
1002 #define CHECK_MASK(num, am, right, sa, share) \
1003         if (((am) & (right)) && !((sa) & (share))) { \
1004                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1005 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1006                         (unsigned int)(share) )); \
1007                 return True; \
1008         }
1009 #endif
1010
1011         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1012                    share_access, FILE_SHARE_WRITE);
1013         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1014                    entry->share_access, FILE_SHARE_WRITE);
1015
1016         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1017                    share_access, FILE_SHARE_READ);
1018         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1019                    entry->share_access, FILE_SHARE_READ);
1020
1021         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1022                    share_access, FILE_SHARE_DELETE);
1023         CHECK_MASK(6, access_mask, DELETE_ACCESS,
1024                    entry->share_access, FILE_SHARE_DELETE);
1025
1026         DEBUG(10,("share_conflict: No conflict.\n"));
1027         return False;
1028 }
1029
1030 #if defined(DEVELOPER)
1031 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1032                                       int num,
1033                                       struct share_mode_entry *share_entry)
1034 {
1035         struct server_id self = messaging_server_id(sconn->msg_ctx);
1036         files_struct *fsp;
1037
1038         if (!serverid_equal(&self, &share_entry->pid)) {
1039                 return;
1040         }
1041
1042         if (!is_valid_share_mode_entry(share_entry)) {
1043                 return;
1044         }
1045
1046         fsp = file_find_dif(sconn, share_entry->id,
1047                             share_entry->share_file_id);
1048         if (!fsp) {
1049                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1050                          share_mode_str(talloc_tos(), num, share_entry) ));
1051                 smb_panic("validate_my_share_entries: Cannot match a "
1052                           "share entry with an open file\n");
1053         }
1054
1055         if ((share_entry->op_type == NO_OPLOCK) &&
1056             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK))
1057         {
1058                 /* Someone has already written to it, but I haven't yet
1059                  * noticed */
1060                 return;
1061         }
1062
1063         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1064                 goto panic;
1065         }
1066
1067         return;
1068
1069  panic:
1070         {
1071                 char *str;
1072                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1073                          share_mode_str(talloc_tos(), num, share_entry) ));
1074                 str = talloc_asprintf(talloc_tos(),
1075                         "validate_my_share_entries: "
1076                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1077                          fsp->fsp_name->base_name,
1078                          (unsigned int)fsp->oplock_type,
1079                          (unsigned int)share_entry->op_type );
1080                 smb_panic(str);
1081         }
1082 }
1083 #endif
1084
1085 bool is_stat_open(uint32 access_mask)
1086 {
1087         const uint32_t stat_open_bits =
1088                 (SYNCHRONIZE_ACCESS|
1089                  FILE_READ_ATTRIBUTES|
1090                  FILE_WRITE_ATTRIBUTES);
1091
1092         return (((access_mask &  stat_open_bits) != 0) &&
1093                 ((access_mask & ~stat_open_bits) == 0));
1094 }
1095
1096 static bool has_delete_on_close(struct share_mode_lock *lck,
1097                                 uint32_t name_hash)
1098 {
1099         struct share_mode_data *d = lck->data;
1100         uint32_t i;
1101
1102         if (d->num_share_modes == 0) {
1103                 return false;
1104         }
1105         if (!is_delete_on_close_set(lck, name_hash)) {
1106                 return false;
1107         }
1108         for (i=0; i<d->num_share_modes; i++) {
1109                 if (!share_mode_stale_pid(d, i)) {
1110                         return true;
1111                 }
1112         }
1113         return false;
1114 }
1115
1116 /****************************************************************************
1117  Deal with share modes
1118  Invarient: Share mode must be locked on entry and exit.
1119  Returns -1 on error, or number of share modes on success (may be zero).
1120 ****************************************************************************/
1121
1122 static NTSTATUS open_mode_check(connection_struct *conn,
1123                                 struct share_mode_lock *lck,
1124                                 uint32 access_mask,
1125                                 uint32 share_access,
1126                                 uint32 create_options,
1127                                 bool *file_existed)
1128 {
1129         int i;
1130
1131         if(lck->data->num_share_modes == 0) {
1132                 return NT_STATUS_OK;
1133         }
1134
1135         if (is_stat_open(access_mask)) {
1136                 /* Stat open that doesn't trigger oplock breaks or share mode
1137                  * checks... ! JRA. */
1138                 return NT_STATUS_OK;
1139         }
1140
1141         /*
1142          * Check if the share modes will give us access.
1143          */
1144
1145 #if defined(DEVELOPER)
1146         for(i = 0; i < lck->data->num_share_modes; i++) {
1147                 validate_my_share_entries(conn->sconn, i,
1148                                           &lck->data->share_modes[i]);
1149         }
1150 #endif
1151
1152         /* Now we check the share modes, after any oplock breaks. */
1153         for(i = 0; i < lck->data->num_share_modes; i++) {
1154
1155                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1156                         continue;
1157                 }
1158
1159                 /* someone else has a share lock on it, check to see if we can
1160                  * too */
1161                 if (share_conflict(&lck->data->share_modes[i],
1162                                    access_mask, share_access)) {
1163
1164                         if (share_mode_stale_pid(lck->data, i)) {
1165                                 continue;
1166                         }
1167
1168                         *file_existed = true;
1169
1170                         return NT_STATUS_SHARING_VIOLATION;
1171                 }
1172         }
1173
1174         if (lck->data->num_share_modes != 0) {
1175                 *file_existed = true;
1176         }
1177
1178         return NT_STATUS_OK;
1179 }
1180
1181 /*
1182  * Send a break message to the oplock holder and delay the open for
1183  * our client.
1184  */
1185
1186 static NTSTATUS send_break_message(files_struct *fsp,
1187                                         struct share_mode_entry *exclusive,
1188                                         uint64_t mid,
1189                                         int oplock_request)
1190 {
1191         NTSTATUS status;
1192         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1193
1194         DEBUG(10, ("Sending break request to PID %s\n",
1195                    procid_str_static(&exclusive->pid)));
1196         exclusive->op_mid = mid;
1197
1198         /* Create the message. */
1199         share_mode_entry_to_message(msg, exclusive);
1200
1201         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1202                                     MSG_SMB_BREAK_REQUEST,
1203                                     (uint8 *)msg, sizeof(msg));
1204         if (!NT_STATUS_IS_OK(status)) {
1205                 DEBUG(3, ("Could not send oplock break message: %s\n",
1206                           nt_errstr(status)));
1207         }
1208
1209         return status;
1210 }
1211
1212 /*
1213  * Return share_mode_entry pointers for :
1214  * 1). Batch oplock entry.
1215  * 2). Batch or exclusive oplock entry (may be identical to #1).
1216  * bool have_level2_oplock
1217  * bool have_no_oplock.
1218  * Do internal consistency checks on the share mode for a file.
1219  */
1220
1221 static void find_oplock_types(files_struct *fsp,
1222                                 int oplock_request,
1223                                 const struct share_mode_lock *lck,
1224                                 struct share_mode_entry **pp_batch,
1225                                 struct share_mode_entry **pp_ex_or_batch,
1226                                 bool *got_level2,
1227                                 bool *got_no_oplock)
1228 {
1229         int i;
1230
1231         *pp_batch = NULL;
1232         *pp_ex_or_batch = NULL;
1233         *got_level2 = false;
1234         *got_no_oplock = false;
1235
1236         /* Ignore stat or internal opens, as is done in
1237                 delay_for_batch_oplocks() and
1238                 delay_for_exclusive_oplocks().
1239          */
1240         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1241                 return;
1242         }
1243
1244         for (i=0; i<lck->data->num_share_modes; i++) {
1245                 struct share_mode_entry *e = &lck->data->share_modes[i];
1246
1247                 if (!is_valid_share_mode_entry(e)) {
1248                         continue;
1249                 }
1250
1251                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1252                         /* We ignore stat opens in the table - they
1253                            always have NO_OPLOCK and never get or
1254                            cause breaks. JRA. */
1255                         continue;
1256                 }
1257
1258                 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1259                         /* batch - can only be one. */
1260                         if (share_mode_stale_pid(lck->data, i)) {
1261                                 DEBUG(10, ("Found stale batch oplock\n"));
1262                                 continue;
1263                         }
1264                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1265                                 smb_panic("Bad batch oplock entry.");
1266                         }
1267                         *pp_batch = e;
1268                 }
1269
1270                 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1271                         if (share_mode_stale_pid(lck->data, i)) {
1272                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1273                                 continue;
1274                         }
1275                         /* Exclusive or batch - can only be one. */
1276                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1277                                 smb_panic("Bad exclusive or batch oplock entry.");
1278                         }
1279                         *pp_ex_or_batch = e;
1280                 }
1281
1282                 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1283                         if (*pp_batch || *pp_ex_or_batch) {
1284                                 if (share_mode_stale_pid(lck->data, i)) {
1285                                         DEBUG(10, ("Found stale LevelII "
1286                                                    "oplock\n"));
1287                                         continue;
1288                                 }
1289                                 smb_panic("Bad levelII oplock entry.");
1290                         }
1291                         *got_level2 = true;
1292                 }
1293
1294                 if (e->op_type == NO_OPLOCK) {
1295                         if (*pp_batch || *pp_ex_or_batch) {
1296                                 if (share_mode_stale_pid(lck->data, i)) {
1297                                         DEBUG(10, ("Found stale NO_OPLOCK "
1298                                                    "entry\n"));
1299                                         continue;
1300                                 }
1301                                 smb_panic("Bad no oplock entry.");
1302                         }
1303                         *got_no_oplock = true;
1304                 }
1305         }
1306 }
1307
1308 static bool delay_for_batch_oplocks(files_struct *fsp,
1309                                         uint64_t mid,
1310                                         int oplock_request,
1311                                         struct share_mode_entry *batch_entry)
1312 {
1313         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1314                 return false;
1315         }
1316         if (batch_entry == NULL) {
1317                 return false;
1318         }
1319
1320         if (server_id_is_disconnected(&batch_entry->pid)) {
1321                 /*
1322                  * TODO: clean up.
1323                  * This could be achieved by sending a break message
1324                  * to ourselves. Special considerations for files
1325                  * with delete_on_close flag set!
1326                  *
1327                  * For now we keep it simple and do not
1328                  * allow delete on close for durable handles.
1329                  */
1330                 return false;
1331         }
1332
1333         /* Found a batch oplock */
1334         send_break_message(fsp, batch_entry, mid, oplock_request);
1335         return true;
1336 }
1337
1338 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1339                                         uint64_t mid,
1340                                         int oplock_request,
1341                                         struct share_mode_entry *ex_entry)
1342 {
1343         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1344                 return false;
1345         }
1346         if (ex_entry == NULL) {
1347                 return false;
1348         }
1349
1350         if (server_id_is_disconnected(&ex_entry->pid)) {
1351                 /*
1352                  * since only durable handles can get disconnected,
1353                  * and we can only get durable handles with batch oplocks,
1354                  * this should actually never be reached...
1355                  */
1356                 return false;
1357         }
1358
1359         send_break_message(fsp, ex_entry, mid, oplock_request);
1360         return true;
1361 }
1362
1363 static bool file_has_brlocks(files_struct *fsp)
1364 {
1365         struct byte_range_lock *br_lck;
1366
1367         br_lck = brl_get_locks_readonly(fsp);
1368         if (!br_lck)
1369                 return false;
1370
1371         return (brl_num_locks(br_lck) > 0);
1372 }
1373
1374 static void grant_fsp_oplock_type(files_struct *fsp,
1375                                 int oplock_request,
1376                                 bool got_level2_oplock,
1377                                 bool got_a_none_oplock)
1378 {
1379         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1380                             lp_level2_oplocks(SNUM(fsp->conn));
1381
1382         /* Start by granting what the client asked for,
1383            but ensure no SAMBA_PRIVATE bits can be set. */
1384         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1385
1386         if (oplock_request & INTERNAL_OPEN_ONLY) {
1387                 /* No oplocks on internal open. */
1388                 fsp->oplock_type = NO_OPLOCK;
1389                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1390                         fsp->oplock_type, fsp_str_dbg(fsp)));
1391                 return;
1392         }
1393
1394         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1395                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1396                         fsp_str_dbg(fsp)));
1397                 fsp->oplock_type = NO_OPLOCK;
1398         }
1399
1400         if (is_stat_open(fsp->access_mask)) {
1401                 /* Leave the value already set. */
1402                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1403                         fsp->oplock_type, fsp_str_dbg(fsp)));
1404                 return;
1405         }
1406
1407         /*
1408          * Match what was requested (fsp->oplock_type) with
1409          * what was found in the existing share modes.
1410          */
1411
1412         if (got_a_none_oplock) {
1413                 fsp->oplock_type = NO_OPLOCK;
1414         } else if (got_level2_oplock) {
1415                 if (fsp->oplock_type == NO_OPLOCK ||
1416                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1417                         /* Store a level2 oplock, but don't tell the client */
1418                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1419                 } else {
1420                         fsp->oplock_type = LEVEL_II_OPLOCK;
1421                 }
1422         } else {
1423                 /* All share_mode_entries are placeholders or deferred.
1424                  * Silently upgrade to fake levelII if the client didn't
1425                  * ask for an oplock. */
1426                 if (fsp->oplock_type == NO_OPLOCK) {
1427                         /* Store a level2 oplock, but don't tell the client */
1428                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1429                 }
1430         }
1431
1432         /*
1433          * Don't grant level2 to clients that don't want them
1434          * or if we've turned them off.
1435          */
1436         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1437                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1438         }
1439
1440         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1441                   fsp->oplock_type, fsp_str_dbg(fsp)));
1442 }
1443
1444 static bool request_timed_out(struct timeval request_time,
1445                               struct timeval timeout)
1446 {
1447         struct timeval now, end_time;
1448         GetTimeOfDay(&now);
1449         end_time = timeval_sum(&request_time, &timeout);
1450         return (timeval_compare(&end_time, &now) < 0);
1451 }
1452
1453 struct defer_open_state {
1454         struct smbd_server_connection *sconn;
1455         uint64_t mid;
1456 };
1457
1458 static void defer_open_done(struct tevent_req *req);
1459
1460 /****************************************************************************
1461  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1462 ****************************************************************************/
1463
1464 static void defer_open(struct share_mode_lock *lck,
1465                        struct timeval request_time,
1466                        struct timeval timeout,
1467                        struct smb_request *req,
1468                        struct deferred_open_record *state)
1469 {
1470         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1471                   "open entry for mid %llu\n",
1472                   (unsigned int)request_time.tv_sec,
1473                   (unsigned int)request_time.tv_usec,
1474                   (unsigned long long)req->mid));
1475
1476         if (!push_deferred_open_message_smb(req, request_time, timeout,
1477                                        state->id, (char *)state, sizeof(*state))) {
1478                 TALLOC_FREE(lck);
1479                 exit_server("push_deferred_open_message_smb failed");
1480         }
1481         if (lck) {
1482                 struct defer_open_state *watch_state;
1483                 struct tevent_req *watch_req;
1484                 bool ret;
1485
1486                 watch_state = talloc(req->sconn, struct defer_open_state);
1487                 if (watch_state == NULL) {
1488                         exit_server("talloc failed");
1489                 }
1490                 watch_state->sconn = req->sconn;
1491                 watch_state->mid = req->mid;
1492
1493                 DEBUG(10, ("defering mid %llu\n",
1494                            (unsigned long long)req->mid));
1495
1496                 watch_req = dbwrap_record_watch_send(
1497                         watch_state, req->sconn->ev_ctx, lck->data->record,
1498                         req->sconn->msg_ctx);
1499                 if (watch_req == NULL) {
1500                         exit_server("Could not watch share mode record");
1501                 }
1502                 tevent_req_set_callback(watch_req, defer_open_done,
1503                                         watch_state);
1504
1505                 ret = tevent_req_set_endtime(
1506                         watch_req, req->sconn->ev_ctx,
1507                         timeval_sum(&request_time, &timeout));
1508                 SMB_ASSERT(ret);
1509         }
1510 }
1511
1512 static void defer_open_done(struct tevent_req *req)
1513 {
1514         struct defer_open_state *state = tevent_req_callback_data(
1515                 req, struct defer_open_state);
1516         NTSTATUS status;
1517         bool ret;
1518
1519         status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1520         TALLOC_FREE(req);
1521         if (!NT_STATUS_IS_OK(status)) {
1522                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1523                           nt_errstr(status)));
1524                 /*
1525                  * Even if it failed, retry anyway. TODO: We need a way to
1526                  * tell a re-scheduled open about that error.
1527                  */
1528         }
1529
1530         DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1531
1532         ret = schedule_deferred_open_message_smb(state->sconn, state->mid);
1533         SMB_ASSERT(ret);
1534         TALLOC_FREE(state);
1535 }
1536
1537
1538 /****************************************************************************
1539  On overwrite open ensure that the attributes match.
1540 ****************************************************************************/
1541
1542 static bool open_match_attributes(connection_struct *conn,
1543                                   uint32 old_dos_attr,
1544                                   uint32 new_dos_attr,
1545                                   mode_t existing_unx_mode,
1546                                   mode_t new_unx_mode,
1547                                   mode_t *returned_unx_mode)
1548 {
1549         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1550
1551         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1552         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1553
1554         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1555            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1556                 *returned_unx_mode = new_unx_mode;
1557         } else {
1558                 *returned_unx_mode = (mode_t)0;
1559         }
1560
1561         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1562                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1563                   "returned_unx_mode = 0%o\n",
1564                   (unsigned int)old_dos_attr,
1565                   (unsigned int)existing_unx_mode,
1566                   (unsigned int)new_dos_attr,
1567                   (unsigned int)*returned_unx_mode ));
1568
1569         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1570         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1571                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1572                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1573                         return False;
1574                 }
1575         }
1576         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1577                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1578                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1579                         return False;
1580                 }
1581         }
1582         return True;
1583 }
1584
1585 /****************************************************************************
1586  Special FCB or DOS processing in the case of a sharing violation.
1587  Try and find a duplicated file handle.
1588 ****************************************************************************/
1589
1590 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1591                                 connection_struct *conn,
1592                                 files_struct *fsp_to_dup_into,
1593                                 const struct smb_filename *smb_fname,
1594                                 struct file_id id,
1595                                 uint16 file_pid,
1596                                 uint64_t vuid,
1597                                 uint32 access_mask,
1598                                 uint32 share_access,
1599                                 uint32 create_options)
1600 {
1601         files_struct *fsp;
1602
1603         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1604                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1605
1606         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1607             fsp = file_find_di_next(fsp)) {
1608
1609                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1610                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1611                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1612                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1613                           (unsigned int)fsp->file_pid,
1614                           (unsigned int)fsp->fh->private_options,
1615                           (unsigned int)fsp->access_mask ));
1616
1617                 if (fsp != fsp_to_dup_into &&
1618                     fsp->fh->fd != -1 &&
1619                     fsp->vuid == vuid &&
1620                     fsp->file_pid == file_pid &&
1621                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1622                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1623                     (fsp->access_mask & FILE_WRITE_DATA) &&
1624                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1625                     strequal(fsp->fsp_name->stream_name,
1626                              smb_fname->stream_name)) {
1627                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1628                         break;
1629                 }
1630         }
1631
1632         if (!fsp) {
1633                 return NT_STATUS_NOT_FOUND;
1634         }
1635
1636         /* quite an insane set of semantics ... */
1637         if (is_executable(smb_fname->base_name) &&
1638             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1639                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1640                 return NT_STATUS_INVALID_PARAMETER;
1641         }
1642
1643         /* We need to duplicate this fsp. */
1644         return dup_file_fsp(req, fsp, access_mask, share_access,
1645                             create_options, fsp_to_dup_into);
1646 }
1647
1648 static void schedule_defer_open(struct share_mode_lock *lck,
1649                                 struct timeval request_time,
1650                                 struct smb_request *req)
1651 {
1652         struct deferred_open_record state;
1653
1654         /* This is a relative time, added to the absolute
1655            request_time value to get the absolute timeout time.
1656            Note that if this is the second or greater time we enter
1657            this codepath for this particular request mid then
1658            request_time is left as the absolute time of the *first*
1659            time this request mid was processed. This is what allows
1660            the request to eventually time out. */
1661
1662         struct timeval timeout;
1663
1664         /* Normally the smbd we asked should respond within
1665          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1666          * the client did, give twice the timeout as a safety
1667          * measure here in case the other smbd is stuck
1668          * somewhere else. */
1669
1670         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1671
1672         /* Nothing actually uses state.delayed_for_oplocks
1673            but it's handy to differentiate in debug messages
1674            between a 30 second delay due to oplock break, and
1675            a 1 second delay for share mode conflicts. */
1676
1677         state.delayed_for_oplocks = True;
1678         state.async_open = false;
1679         state.id = lck->data->id;
1680
1681         if (!request_timed_out(request_time, timeout)) {
1682                 defer_open(lck, request_time, timeout, req, &state);
1683         }
1684 }
1685
1686 /****************************************************************************
1687  Reschedule an open call that went asynchronous.
1688 ****************************************************************************/
1689
1690 static void schedule_async_open(struct timeval request_time,
1691                                 struct smb_request *req)
1692 {
1693         struct deferred_open_record state;
1694         struct timeval timeout;
1695
1696         timeout = timeval_set(20, 0);
1697
1698         ZERO_STRUCT(state);
1699         state.delayed_for_oplocks = false;
1700         state.async_open = true;
1701
1702         if (!request_timed_out(request_time, timeout)) {
1703                 defer_open(NULL, request_time, timeout, req, &state);
1704         }
1705 }
1706
1707 /****************************************************************************
1708  Work out what access_mask to use from what the client sent us.
1709 ****************************************************************************/
1710
1711 static NTSTATUS smbd_calculate_maximum_allowed_access(
1712         connection_struct *conn,
1713         const struct smb_filename *smb_fname,
1714         bool use_privs,
1715         uint32_t *p_access_mask)
1716 {
1717         struct security_descriptor *sd;
1718         uint32_t access_granted;
1719         NTSTATUS status;
1720
1721         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1722                 *p_access_mask |= FILE_GENERIC_ALL;
1723                 return NT_STATUS_OK;
1724         }
1725
1726         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1727                                     (SECINFO_OWNER |
1728                                      SECINFO_GROUP |
1729                                      SECINFO_DACL),
1730                                     talloc_tos(), &sd);
1731
1732         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1733                 /*
1734                  * File did not exist
1735                  */
1736                 *p_access_mask = FILE_GENERIC_ALL;
1737                 return NT_STATUS_OK;
1738         }
1739         if (!NT_STATUS_IS_OK(status)) {
1740                 DEBUG(10,("Could not get acl on file %s: %s\n",
1741                           smb_fname_str_dbg(smb_fname),
1742                           nt_errstr(status)));
1743                 return NT_STATUS_ACCESS_DENIED;
1744         }
1745
1746         /*
1747          * If we can access the path to this file, by
1748          * default we have FILE_READ_ATTRIBUTES from the
1749          * containing directory. See the section:
1750          * "Algorithm to Check Access to an Existing File"
1751          * in MS-FSA.pdf.
1752          *
1753          * se_file_access_check()
1754          * also takes care of owner WRITE_DAC and READ_CONTROL.
1755          */
1756         status = se_file_access_check(sd,
1757                                  get_current_nttok(conn),
1758                                  use_privs,
1759                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1760                                  &access_granted);
1761
1762         TALLOC_FREE(sd);
1763
1764         if (!NT_STATUS_IS_OK(status)) {
1765                 DEBUG(10, ("Access denied on file %s: "
1766                            "when calculating maximum access\n",
1767                            smb_fname_str_dbg(smb_fname)));
1768                 return NT_STATUS_ACCESS_DENIED;
1769         }
1770         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1771
1772         if (!(access_granted & DELETE_ACCESS)) {
1773                 if (can_delete_file_in_directory(conn, smb_fname)) {
1774                         *p_access_mask |= DELETE_ACCESS;
1775                 }
1776         }
1777
1778         return NT_STATUS_OK;
1779 }
1780
1781 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1782                                     const struct smb_filename *smb_fname,
1783                                     bool use_privs,
1784                                     uint32_t access_mask,
1785                                     uint32_t *access_mask_out)
1786 {
1787         NTSTATUS status;
1788         uint32_t orig_access_mask = access_mask;
1789         uint32_t rejected_share_access;
1790
1791         /*
1792          * Convert GENERIC bits to specific bits.
1793          */
1794
1795         se_map_generic(&access_mask, &file_generic_mapping);
1796
1797         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1798         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1799
1800                 status = smbd_calculate_maximum_allowed_access(
1801                         conn, smb_fname, use_privs, &access_mask);
1802
1803                 if (!NT_STATUS_IS_OK(status)) {
1804                         return status;
1805                 }
1806
1807                 access_mask &= conn->share_access;
1808         }
1809
1810         rejected_share_access = access_mask & ~(conn->share_access);
1811
1812         if (rejected_share_access) {
1813                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1814                         "file %s: rejected by share access mask[0x%08X] "
1815                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1816                         smb_fname_str_dbg(smb_fname),
1817                         conn->share_access,
1818                         orig_access_mask, access_mask,
1819                         rejected_share_access));
1820                 return NT_STATUS_ACCESS_DENIED;
1821         }
1822
1823         *access_mask_out = access_mask;
1824         return NT_STATUS_OK;
1825 }
1826
1827 /****************************************************************************
1828  Remove the deferred open entry under lock.
1829 ****************************************************************************/
1830
1831 /****************************************************************************
1832  Return true if this is a state pointer to an asynchronous create.
1833 ****************************************************************************/
1834
1835 bool is_deferred_open_async(const void *ptr)
1836 {
1837         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1838
1839         return state->async_open;
1840 }
1841
1842 static bool clear_ads(uint32_t create_disposition)
1843 {
1844         bool ret = false;
1845
1846         switch (create_disposition) {
1847         case FILE_SUPERSEDE:
1848         case FILE_OVERWRITE_IF:
1849         case FILE_OVERWRITE:
1850                 ret = true;
1851                 break;
1852         default:
1853                 break;
1854         }
1855         return ret;
1856 }
1857
1858 static int disposition_to_open_flags(uint32_t create_disposition)
1859 {
1860         int ret = 0;
1861
1862         /*
1863          * Currently we're using FILE_SUPERSEDE as the same as
1864          * FILE_OVERWRITE_IF but they really are
1865          * different. FILE_SUPERSEDE deletes an existing file
1866          * (requiring delete access) then recreates it.
1867          */
1868
1869         switch (create_disposition) {
1870         case FILE_SUPERSEDE:
1871         case FILE_OVERWRITE_IF:
1872                 /*
1873                  * If file exists replace/overwrite. If file doesn't
1874                  * exist create.
1875                  */
1876                 ret = O_CREAT|O_TRUNC;
1877                 break;
1878
1879         case FILE_OPEN:
1880                 /*
1881                  * If file exists open. If file doesn't exist error.
1882                  */
1883                 ret = 0;
1884                 break;
1885
1886         case FILE_OVERWRITE:
1887                 /*
1888                  * If file exists overwrite. If file doesn't exist
1889                  * error.
1890                  */
1891                 ret = O_TRUNC;
1892                 break;
1893
1894         case FILE_CREATE:
1895                 /*
1896                  * If file exists error. If file doesn't exist create.
1897                  */
1898                 ret = O_CREAT|O_EXCL;
1899                 break;
1900
1901         case FILE_OPEN_IF:
1902                 /*
1903                  * If file exists open. If file doesn't exist create.
1904                  */
1905                 ret = O_CREAT;
1906                 break;
1907         }
1908         return ret;
1909 }
1910
1911 static int calculate_open_access_flags(uint32_t access_mask,
1912                                        int oplock_request,
1913                                        uint32_t private_flags)
1914 {
1915         bool need_write, need_read;
1916
1917         /*
1918          * Note that we ignore the append flag as append does not
1919          * mean the same thing under DOS and Unix.
1920          */
1921
1922         need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
1923         if (!need_write) {
1924                 return O_RDONLY;
1925         }
1926
1927         /* DENY_DOS opens are always underlying read-write on the
1928            file handle, no matter what the requested access mask
1929            says. */
1930
1931         need_read =
1932                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1933                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1934                                 FILE_READ_EA|FILE_EXECUTE));
1935
1936         if (!need_read) {
1937                 return O_WRONLY;
1938         }
1939         return O_RDWR;
1940 }
1941
1942 /****************************************************************************
1943  Open a file with a share mode. Passed in an already created files_struct *.
1944 ****************************************************************************/
1945
1946 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1947                             struct smb_request *req,
1948                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1949                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1950                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1951                             uint32 create_options,      /* options such as delete on close. */
1952                             uint32 new_dos_attributes,  /* attributes used for new file. */
1953                             int oplock_request,         /* internal Samba oplock codes. */
1954                                                         /* Information (FILE_EXISTS etc.) */
1955                             uint32_t private_flags,     /* Samba specific flags. */
1956                             int *pinfo,
1957                             files_struct *fsp)
1958 {
1959         struct smb_filename *smb_fname = fsp->fsp_name;
1960         int flags=0;
1961         int flags2=0;
1962         bool file_existed = VALID_STAT(smb_fname->st);
1963         bool def_acl = False;
1964         bool posix_open = False;
1965         bool new_file_created = False;
1966         bool first_open_attempt = true;
1967         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1968         mode_t new_unx_mode = (mode_t)0;
1969         mode_t unx_mode = (mode_t)0;
1970         int info;
1971         uint32 existing_dos_attributes = 0;
1972         struct timeval request_time = timeval_zero();
1973         struct share_mode_lock *lck = NULL;
1974         uint32 open_access_mask = access_mask;
1975         NTSTATUS status;
1976         char *parent_dir;
1977         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1978         struct share_mode_entry *batch_entry = NULL;
1979         struct share_mode_entry *exclusive_entry = NULL;
1980         bool got_level2_oplock = false;
1981         bool got_a_none_oplock = false;
1982         struct timespec old_write_time;
1983         struct file_id id;
1984
1985         if (conn->printer) {
1986                 /*
1987                  * Printers are handled completely differently.
1988                  * Most of the passed parameters are ignored.
1989                  */
1990
1991                 if (pinfo) {
1992                         *pinfo = FILE_WAS_CREATED;
1993                 }
1994
1995                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1996                            smb_fname_str_dbg(smb_fname)));
1997
1998                 if (!req) {
1999                         DEBUG(0,("open_file_ntcreate: printer open without "
2000                                 "an SMB request!\n"));
2001                         return NT_STATUS_INTERNAL_ERROR;
2002                 }
2003
2004                 return print_spool_open(fsp, smb_fname->base_name,
2005                                         req->vuid);
2006         }
2007
2008         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2009                             NULL)) {
2010                 return NT_STATUS_NO_MEMORY;
2011         }
2012
2013         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2014                 posix_open = True;
2015                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2016                 new_dos_attributes = 0;
2017         } else {
2018                 /* Windows allows a new file to be created and
2019                    silently removes a FILE_ATTRIBUTE_DIRECTORY
2020                    sent by the client. Do the same. */
2021
2022                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2023
2024                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2025                  * created new. */
2026                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2027                                      smb_fname, parent_dir);
2028         }
2029
2030         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2031                    "access_mask=0x%x share_access=0x%x "
2032                    "create_disposition = 0x%x create_options=0x%x "
2033                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2034                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2035                    access_mask, share_access, create_disposition,
2036                    create_options, (unsigned int)unx_mode, oplock_request,
2037                    (unsigned int)private_flags));
2038
2039         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2040                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2041                 return NT_STATUS_INTERNAL_ERROR;
2042         }
2043
2044         /*
2045          * Only non-internal opens can be deferred at all
2046          */
2047
2048         if (req) {
2049                 void *ptr;
2050                 if (get_deferred_open_message_state(req,
2051                                 &request_time,
2052                                 &ptr)) {
2053                         /* Remember the absolute time of the original
2054                            request with this mid. We'll use it later to
2055                            see if this has timed out. */
2056
2057                         /* If it was an async create retry, the file
2058                            didn't exist. */
2059
2060                         if (is_deferred_open_async(ptr)) {
2061                                 SET_STAT_INVALID(smb_fname->st);
2062                                 file_existed = false;
2063                         }
2064
2065                         /* Ensure we don't reprocess this message. */
2066                         remove_deferred_open_message_smb(req->sconn, req->mid);
2067
2068                         first_open_attempt = false;
2069                 }
2070         }
2071
2072         if (!posix_open) {
2073                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2074                 if (file_existed) {
2075                         existing_dos_attributes = dos_mode(conn, smb_fname);
2076                 }
2077         }
2078
2079         /* ignore any oplock requests if oplocks are disabled */
2080         if (!lp_oplocks(SNUM(conn)) ||
2081             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2082                 /* Mask off everything except the private Samba bits. */
2083                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2084         }
2085
2086         /* this is for OS/2 long file names - say we don't support them */
2087         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2088                 /* OS/2 Workplace shell fix may be main code stream in a later
2089                  * release. */
2090                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2091                          "supported.\n"));
2092                 if (use_nt_status()) {
2093                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2094                 }
2095                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2096         }
2097
2098         switch( create_disposition ) {
2099                 case FILE_OPEN:
2100                         /* If file exists open. If file doesn't exist error. */
2101                         if (!file_existed) {
2102                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2103                                          "requested for file %s and file "
2104                                          "doesn't exist.\n",
2105                                          smb_fname_str_dbg(smb_fname)));
2106                                 errno = ENOENT;
2107                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2108                         }
2109                         break;
2110
2111                 case FILE_OVERWRITE:
2112                         /* If file exists overwrite. If file doesn't exist
2113                          * error. */
2114                         if (!file_existed) {
2115                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2116                                          "requested for file %s and file "
2117                                          "doesn't exist.\n",
2118                                          smb_fname_str_dbg(smb_fname) ));
2119                                 errno = ENOENT;
2120                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2121                         }
2122                         break;
2123
2124                 case FILE_CREATE:
2125                         /* If file exists error. If file doesn't exist
2126                          * create. */
2127                         if (file_existed) {
2128                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2129                                          "requested for file %s and file "
2130                                          "already exists.\n",
2131                                          smb_fname_str_dbg(smb_fname)));
2132                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2133                                         errno = EISDIR;
2134                                 } else {
2135                                         errno = EEXIST;
2136                                 }
2137                                 return map_nt_error_from_unix(errno);
2138                         }
2139                         break;
2140
2141                 case FILE_SUPERSEDE:
2142                 case FILE_OVERWRITE_IF:
2143                 case FILE_OPEN_IF:
2144                         break;
2145                 default:
2146                         return NT_STATUS_INVALID_PARAMETER;
2147         }
2148
2149         flags2 = disposition_to_open_flags(create_disposition);
2150
2151         /* We only care about matching attributes on file exists and
2152          * overwrite. */
2153
2154         if (!posix_open && file_existed &&
2155             ((create_disposition == FILE_OVERWRITE) ||
2156              (create_disposition == FILE_OVERWRITE_IF))) {
2157                 if (!open_match_attributes(conn, existing_dos_attributes,
2158                                            new_dos_attributes,
2159                                            smb_fname->st.st_ex_mode,
2160                                            unx_mode, &new_unx_mode)) {
2161                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2162                                  "for file %s (%x %x) (0%o, 0%o)\n",
2163                                  smb_fname_str_dbg(smb_fname),
2164                                  existing_dos_attributes,
2165                                  new_dos_attributes,
2166                                  (unsigned int)smb_fname->st.st_ex_mode,
2167                                  (unsigned int)unx_mode ));
2168                         errno = EACCES;
2169                         return NT_STATUS_ACCESS_DENIED;
2170                 }
2171         }
2172
2173         status = smbd_calculate_access_mask(conn, smb_fname,
2174                                         false,
2175                                         access_mask,
2176                                         &access_mask);
2177         if (!NT_STATUS_IS_OK(status)) {
2178                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2179                         "on file %s returned %s\n",
2180                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2181                 return status;
2182         }
2183
2184         open_access_mask = access_mask;
2185
2186         if (flags2 & O_TRUNC) {
2187                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2188         }
2189
2190         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2191                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2192                     access_mask));
2193
2194         /*
2195          * Note that we ignore the append flag as append does not
2196          * mean the same thing under DOS and Unix.
2197          */
2198
2199         flags = calculate_open_access_flags(access_mask, oplock_request,
2200                                             private_flags);
2201
2202         /*
2203          * Currently we only look at FILE_WRITE_THROUGH for create options.
2204          */
2205
2206 #if defined(O_SYNC)
2207         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2208                 flags2 |= O_SYNC;
2209         }
2210 #endif /* O_SYNC */
2211
2212         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2213                 flags2 |= O_APPEND;
2214         }
2215
2216         if (!posix_open && !CAN_WRITE(conn)) {
2217                 /*
2218                  * We should really return a permission denied error if either
2219                  * O_CREAT or O_TRUNC are set, but for compatibility with
2220                  * older versions of Samba we just AND them out.
2221                  */
2222                 flags2 &= ~(O_CREAT|O_TRUNC);
2223         }
2224
2225         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2226                 /*
2227                  * With kernel oplocks the open breaking an oplock
2228                  * blocks until the oplock holder has given up the
2229                  * oplock or closed the file. We prevent this by first
2230                  * trying to open the file with O_NONBLOCK (see "man
2231                  * fcntl" on Linux). For the second try, triggered by
2232                  * an oplock break response, we do not need this
2233                  * anymore.
2234                  *
2235                  * This is true under the assumption that only Samba
2236                  * requests kernel oplocks. Once someone else like
2237                  * NFSv4 starts to use that API, we will have to
2238                  * modify this by communicating with the NFSv4 server.
2239                  */
2240                 flags2 |= O_NONBLOCK;
2241         }
2242
2243         /*
2244          * Ensure we can't write on a read-only share or file.
2245          */
2246
2247         if (flags != O_RDONLY && file_existed &&
2248             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2249                 DEBUG(5,("open_file_ntcreate: write access requested for "
2250                          "file %s on read only %s\n",
2251                          smb_fname_str_dbg(smb_fname),
2252                          !CAN_WRITE(conn) ? "share" : "file" ));
2253                 errno = EACCES;
2254                 return NT_STATUS_ACCESS_DENIED;
2255         }
2256
2257         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2258         fsp->share_access = share_access;
2259         fsp->fh->private_options = private_flags;
2260         fsp->access_mask = open_access_mask; /* We change this to the
2261                                               * requested access_mask after
2262                                               * the open is done. */
2263         fsp->posix_open = posix_open;
2264
2265         /* Ensure no SAMBA_PRIVATE bits can be set. */
2266         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2267
2268         if (timeval_is_zero(&request_time)) {
2269                 request_time = fsp->open_time;
2270         }
2271
2272         /*
2273          * Ensure we pay attention to default ACLs on directories if required.
2274          */
2275
2276         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2277             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2278                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2279         }
2280
2281         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2282                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2283                  (unsigned int)flags, (unsigned int)flags2,
2284                  (unsigned int)unx_mode, (unsigned int)access_mask,
2285                  (unsigned int)open_access_mask));
2286
2287         fsp_open = open_file(fsp, conn, req, parent_dir,
2288                              flags|flags2, unx_mode, access_mask,
2289                              open_access_mask, &new_file_created);
2290
2291         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2292                 struct deferred_open_record state;
2293
2294                 /*
2295                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2296                  */
2297                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2298                         DEBUG(10, ("FIFO busy\n"));
2299                         return NT_STATUS_NETWORK_BUSY;
2300                 }
2301                 if (req == NULL) {
2302                         DEBUG(10, ("Internal open busy\n"));
2303                         return NT_STATUS_NETWORK_BUSY;
2304                 }
2305
2306                 /*
2307                  * From here on we assume this is an oplock break triggered
2308                  */
2309
2310                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2311                 if (lck == NULL) {
2312                         state.delayed_for_oplocks = false;
2313                         state.async_open = false;
2314                         state.id = fsp->file_id;
2315                         defer_open(NULL, request_time, timeval_set(0, 0),
2316                                    req, &state);
2317                         DEBUG(10, ("No share mode lock found after "
2318                                    "EWOULDBLOCK, retrying sync\n"));
2319                         return NT_STATUS_SHARING_VIOLATION;
2320                 }
2321
2322                 find_oplock_types(fsp, 0, lck, &batch_entry, &exclusive_entry,
2323                                   &got_level2_oplock, &got_a_none_oplock);
2324
2325                 if (delay_for_batch_oplocks(fsp, req->mid, 0, batch_entry) ||
2326                     delay_for_exclusive_oplocks(fsp, req->mid, 0,
2327                                                 exclusive_entry)) {
2328                         schedule_defer_open(lck, request_time, req);
2329                         TALLOC_FREE(lck);
2330                         DEBUG(10, ("Sent oplock break request to kernel "
2331                                    "oplock holder\n"));
2332                         return NT_STATUS_SHARING_VIOLATION;
2333                 }
2334
2335                 /*
2336                  * No oplock from Samba around. Immediately retry with
2337                  * a blocking open.
2338                  */
2339                 state.delayed_for_oplocks = false;
2340                 state.async_open = false;
2341                 state.id = lck->data->id;
2342                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2343                 TALLOC_FREE(lck);
2344                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2345                            "Retrying sync\n"));
2346                 return NT_STATUS_SHARING_VIOLATION;
2347         }
2348
2349         if (!NT_STATUS_IS_OK(fsp_open)) {
2350                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2351                         schedule_async_open(request_time, req);
2352                 }
2353                 return fsp_open;
2354         }
2355
2356         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2357                 /*
2358                  * The file did exist, but some other (local or NFS)
2359                  * process either renamed/unlinked and re-created the
2360                  * file with different dev/ino after we walked the path,
2361                  * but before we did the open. We could retry the
2362                  * open but it's a rare enough case it's easier to
2363                  * just fail the open to prevent creating any problems
2364                  * in the open file db having the wrong dev/ino key.
2365                  */
2366                 fd_close(fsp);
2367                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2368                         "Old (dev=0x%llu, ino =0x%llu). "
2369                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2370                         " with NT_STATUS_ACCESS_DENIED.\n",
2371                          smb_fname_str_dbg(smb_fname),
2372                          (unsigned long long)saved_stat.st_ex_dev,
2373                          (unsigned long long)saved_stat.st_ex_ino,
2374                          (unsigned long long)smb_fname->st.st_ex_dev,
2375                          (unsigned long long)smb_fname->st.st_ex_ino));
2376                 return NT_STATUS_ACCESS_DENIED;
2377         }
2378
2379         old_write_time = smb_fname->st.st_ex_mtime;
2380
2381         /*
2382          * Deal with the race condition where two smbd's detect the
2383          * file doesn't exist and do the create at the same time. One
2384          * of them will win and set a share mode, the other (ie. this
2385          * one) should check if the requested share mode for this
2386          * create is allowed.
2387          */
2388
2389         /*
2390          * Now the file exists and fsp is successfully opened,
2391          * fsp->dev and fsp->inode are valid and should replace the
2392          * dev=0,inode=0 from a non existent file. Spotted by
2393          * Nadav Danieli <nadavd@exanet.com>. JRA.
2394          */
2395
2396         id = fsp->file_id;
2397
2398         lck = get_share_mode_lock(talloc_tos(), id,
2399                                   conn->connectpath,
2400                                   smb_fname, &old_write_time);
2401
2402         if (lck == NULL) {
2403                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2404                           "mode lock for %s\n",
2405                           smb_fname_str_dbg(smb_fname)));
2406                 fd_close(fsp);
2407                 return NT_STATUS_SHARING_VIOLATION;
2408         }
2409
2410         /* Get the types we need to examine. */
2411         find_oplock_types(fsp,
2412                           oplock_request,
2413                           lck,
2414                           &batch_entry,
2415                           &exclusive_entry,
2416                           &got_level2_oplock,
2417                           &got_a_none_oplock);
2418
2419         if (has_delete_on_close(lck, fsp->name_hash)) {
2420                 TALLOC_FREE(lck);
2421                 fd_close(fsp);
2422                 return NT_STATUS_DELETE_PENDING;
2423         }
2424
2425         /* First pass - send break only on batch oplocks. */
2426         if ((req != NULL) &&
2427             delay_for_batch_oplocks(fsp,
2428                                     req->mid,
2429                                     oplock_request,
2430                                     batch_entry)) {
2431                 schedule_defer_open(lck, request_time, req);
2432                 TALLOC_FREE(lck);
2433                 fd_close(fsp);
2434                 return NT_STATUS_SHARING_VIOLATION;
2435         }
2436
2437         status = open_mode_check(conn, lck,
2438                                  access_mask, share_access,
2439                                  create_options, &file_existed);
2440
2441         if (NT_STATUS_IS_OK(status)) {
2442                 /* We might be going to allow this open. Check oplock
2443                  * status again. */
2444                 /* Second pass - send break for both batch or
2445                  * exclusive oplocks. */
2446                 if ((req != NULL) &&
2447                     delay_for_exclusive_oplocks(
2448                             fsp,
2449                             req->mid,
2450                             oplock_request,
2451                             exclusive_entry)) {
2452                         schedule_defer_open(lck, request_time, req);
2453                         TALLOC_FREE(lck);
2454                         fd_close(fsp);
2455                         return NT_STATUS_SHARING_VIOLATION;
2456                 }
2457         }
2458
2459         if (!NT_STATUS_IS_OK(status)) {
2460                 uint32 can_access_mask;
2461                 bool can_access = True;
2462
2463                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2464
2465                 /* Check if this can be done with the deny_dos and fcb
2466                  * calls. */
2467                 if (private_flags &
2468                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2469                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2470                         if (req == NULL) {
2471                                 DEBUG(0, ("DOS open without an SMB "
2472                                           "request!\n"));
2473                                 TALLOC_FREE(lck);
2474                                 fd_close(fsp);
2475                                 return NT_STATUS_INTERNAL_ERROR;
2476                         }
2477
2478                         /* Use the client requested access mask here,
2479                          * not the one we open with. */
2480                         status = fcb_or_dos_open(req,
2481                                                  conn,
2482                                                  fsp,
2483                                                  smb_fname,
2484                                                  id,
2485                                                  req->smbpid,
2486                                                  req->vuid,
2487                                                  access_mask,
2488                                                  share_access,
2489                                                  create_options);
2490
2491                         if (NT_STATUS_IS_OK(status)) {
2492                                 TALLOC_FREE(lck);
2493                                 if (pinfo) {
2494                                         *pinfo = FILE_WAS_OPENED;
2495                                 }
2496                                 return NT_STATUS_OK;
2497                         }
2498                 }
2499
2500                 /*
2501                  * This next line is a subtlety we need for
2502                  * MS-Access. If a file open will fail due to share
2503                  * permissions and also for security (access) reasons,
2504                  * we need to return the access failed error, not the
2505                  * share error. We can't open the file due to kernel
2506                  * oplock deadlock (it's possible we failed above on
2507                  * the open_mode_check()) so use a userspace check.
2508                  */
2509
2510                 if (flags & O_RDWR) {
2511                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2512                 } else if (flags & O_WRONLY) {
2513                         can_access_mask = FILE_WRITE_DATA;
2514                 } else {
2515                         can_access_mask = FILE_READ_DATA;
2516                 }
2517
2518                 if (((can_access_mask & FILE_WRITE_DATA) &&
2519                      !CAN_WRITE(conn)) ||
2520                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2521                                                               smb_fname,
2522                                                               false,
2523                                                               can_access_mask))) {
2524                         can_access = False;
2525                 }
2526
2527                 /*
2528                  * If we're returning a share violation, ensure we
2529                  * cope with the braindead 1 second delay (SMB1 only).
2530                  */
2531
2532                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2533                     !conn->sconn->using_smb2 &&
2534                     lp_defer_sharing_violations()) {
2535                         struct timeval timeout;
2536                         struct deferred_open_record state;
2537                         int timeout_usecs;
2538
2539                         /* this is a hack to speed up torture tests
2540                            in 'make test' */
2541                         timeout_usecs = lp_parm_int(SNUM(conn),
2542                                                     "smbd","sharedelay",
2543                                                     SHARING_VIOLATION_USEC_WAIT);
2544
2545                         /* This is a relative time, added to the absolute
2546                            request_time value to get the absolute timeout time.
2547                            Note that if this is the second or greater time we enter
2548                            this codepath for this particular request mid then
2549                            request_time is left as the absolute time of the *first*
2550                            time this request mid was processed. This is what allows
2551                            the request to eventually time out. */
2552
2553                         timeout = timeval_set(0, timeout_usecs);
2554
2555                         /* Nothing actually uses state.delayed_for_oplocks
2556                            but it's handy to differentiate in debug messages
2557                            between a 30 second delay due to oplock break, and
2558                            a 1 second delay for share mode conflicts. */
2559
2560                         state.delayed_for_oplocks = False;
2561                         state.async_open = false;
2562                         state.id = id;
2563
2564                         if ((req != NULL)
2565                             && !request_timed_out(request_time,
2566                                                   timeout)) {
2567                                 defer_open(lck, request_time, timeout,
2568                                            req, &state);
2569                         }
2570                 }
2571
2572                 TALLOC_FREE(lck);
2573                 fd_close(fsp);
2574                 if (can_access) {
2575                         /*
2576                          * We have detected a sharing violation here
2577                          * so return the correct error code
2578                          */
2579                         status = NT_STATUS_SHARING_VIOLATION;
2580                 } else {
2581                         status = NT_STATUS_ACCESS_DENIED;
2582                 }
2583                 return status;
2584         }
2585
2586         grant_fsp_oplock_type(fsp,
2587                               oplock_request,
2588                               got_level2_oplock,
2589                               got_a_none_oplock);
2590
2591         /*
2592          * We have the share entry *locked*.....
2593          */
2594
2595         /* Delete streams if create_disposition requires it */
2596         if (!new_file_created && clear_ads(create_disposition) &&
2597             !is_ntfs_stream_smb_fname(smb_fname)) {
2598                 status = delete_all_streams(conn, smb_fname->base_name);
2599                 if (!NT_STATUS_IS_OK(status)) {
2600                         TALLOC_FREE(lck);
2601                         fd_close(fsp);
2602                         return status;
2603                 }
2604         }
2605
2606         /* note that we ignore failure for the following. It is
2607            basically a hack for NFS, and NFS will never set one of
2608            these only read them. Nobody but Samba can ever set a deny
2609            mode and we have already checked our more authoritative
2610            locking database for permission to set this deny mode. If
2611            the kernel refuses the operations then the kernel is wrong.
2612            note that GPFS supports it as well - jmcd */
2613
2614         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2615                 int ret_flock;
2616                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2617                 if(ret_flock == -1 ){
2618
2619                         TALLOC_FREE(lck);
2620                         fd_close(fsp);
2621
2622                         return NT_STATUS_SHARING_VIOLATION;
2623                 }
2624         }
2625
2626         /*
2627          * At this point onwards, we can guarantee that the share entry
2628          * is locked, whether we created the file or not, and that the
2629          * deny mode is compatible with all current opens.
2630          */
2631
2632         /*
2633          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2634          * but we don't have to store this - just ignore it on access check.
2635          */
2636         if (conn->sconn->using_smb2) {
2637                 /*
2638                  * SMB2 doesn't return it (according to Microsoft tests).
2639                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2640                  * File created with access = 0x7 (Read, Write, Delete)
2641                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2642                  */
2643                 fsp->access_mask = access_mask;
2644         } else {
2645                 /* But SMB1 does. */
2646                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2647         }
2648
2649         if (file_existed) {
2650                 /* stat opens on existing files don't get oplocks. */
2651                 if (is_stat_open(open_access_mask)) {
2652                         fsp->oplock_type = NO_OPLOCK;
2653                 }
2654         }
2655
2656         if (new_file_created) {
2657                 info = FILE_WAS_CREATED;
2658         } else {
2659                 if (flags2 & O_TRUNC) {
2660                         info = FILE_WAS_OVERWRITTEN;
2661                 } else {
2662                         info = FILE_WAS_OPENED;
2663                 }
2664         }
2665
2666         if (pinfo) {
2667                 *pinfo = info;
2668         }
2669
2670         /*
2671          * Setup the oplock info in both the shared memory and
2672          * file structs.
2673          */
2674
2675         status = set_file_oplock(fsp, fsp->oplock_type);
2676         if (!NT_STATUS_IS_OK(status)) {
2677                 /*
2678                  * Could not get the kernel oplock
2679                  */
2680                 fsp->oplock_type = NO_OPLOCK;
2681         }
2682
2683         if (!set_share_mode(lck, fsp, get_current_uid(conn),
2684                             req ? req->mid : 0,
2685                             fsp->oplock_type)) {
2686                 TALLOC_FREE(lck);
2687                 fd_close(fsp);
2688                 return NT_STATUS_NO_MEMORY;
2689         }
2690
2691         /* Handle strange delete on close create semantics. */
2692         if (create_options & FILE_DELETE_ON_CLOSE) {
2693
2694                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2695
2696                 if (!NT_STATUS_IS_OK(status)) {
2697                         /* Remember to delete the mode we just added. */
2698                         del_share_mode(lck, fsp);
2699                         TALLOC_FREE(lck);
2700                         fd_close(fsp);
2701                         return status;
2702                 }
2703                 /* Note that here we set the *inital* delete on close flag,
2704                    not the regular one. The magic gets handled in close. */
2705                 fsp->initial_delete_on_close = True;
2706         }
2707
2708         if (info != FILE_WAS_OPENED) {
2709                 /* Files should be initially set as archive */
2710                 if (lp_map_archive(SNUM(conn)) ||
2711                     lp_store_dos_attributes(SNUM(conn))) {
2712                         if (!posix_open) {
2713                                 if (file_set_dosmode(conn, smb_fname,
2714                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2715                                             parent_dir, true) == 0) {
2716                                         unx_mode = smb_fname->st.st_ex_mode;
2717                                 }
2718                         }
2719                 }
2720         }
2721
2722         /* Determine sparse flag. */
2723         if (posix_open) {
2724                 /* POSIX opens are sparse by default. */
2725                 fsp->is_sparse = true;
2726         } else {
2727                 fsp->is_sparse = (file_existed &&
2728                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2729         }
2730
2731         /*
2732          * Take care of inherited ACLs on created files - if default ACL not
2733          * selected.
2734          */
2735
2736         if (!posix_open && new_file_created && !def_acl) {
2737
2738                 int saved_errno = errno; /* We might get ENOSYS in the next
2739                                           * call.. */
2740
2741                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2742                     errno == ENOSYS) {
2743                         errno = saved_errno; /* Ignore ENOSYS */
2744                 }
2745
2746         } else if (new_unx_mode) {
2747
2748                 int ret = -1;
2749
2750                 /* Attributes need changing. File already existed. */
2751
2752                 {
2753                         int saved_errno = errno; /* We might get ENOSYS in the
2754                                                   * next call.. */
2755                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2756
2757                         if (ret == -1 && errno == ENOSYS) {
2758                                 errno = saved_errno; /* Ignore ENOSYS */
2759                         } else {
2760                                 DEBUG(5, ("open_file_ntcreate: reset "
2761                                           "attributes of file %s to 0%o\n",
2762                                           smb_fname_str_dbg(smb_fname),
2763                                           (unsigned int)new_unx_mode));
2764                                 ret = 0; /* Don't do the fchmod below. */
2765                         }
2766                 }
2767
2768                 if ((ret == -1) &&
2769                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2770                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2771                                   "attributes of file %s to 0%o\n",
2772                                   smb_fname_str_dbg(smb_fname),
2773                                   (unsigned int)new_unx_mode));
2774         }
2775
2776         TALLOC_FREE(lck);
2777
2778         return NT_STATUS_OK;
2779 }
2780
2781
2782 /****************************************************************************
2783  Open a file for for write to ensure that we can fchmod it.
2784 ****************************************************************************/
2785
2786 NTSTATUS open_file_fchmod(connection_struct *conn,
2787                           struct smb_filename *smb_fname,
2788                           files_struct **result)
2789 {
2790         if (!VALID_STAT(smb_fname->st)) {
2791                 return NT_STATUS_INVALID_PARAMETER;
2792         }
2793
2794         return SMB_VFS_CREATE_FILE(
2795                 conn,                                   /* conn */
2796                 NULL,                                   /* req */
2797                 0,                                      /* root_dir_fid */
2798                 smb_fname,                              /* fname */
2799                 FILE_WRITE_DATA,                        /* access_mask */
2800                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2801                     FILE_SHARE_DELETE),
2802                 FILE_OPEN,                              /* create_disposition*/
2803                 0,                                      /* create_options */
2804                 0,                                      /* file_attributes */
2805                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2806                 0,                                      /* allocation_size */
2807                 0,                                      /* private_flags */
2808                 NULL,                                   /* sd */
2809                 NULL,                                   /* ea_list */
2810                 result,                                 /* result */
2811                 NULL);                                  /* pinfo */
2812 }
2813
2814 static NTSTATUS mkdir_internal(connection_struct *conn,
2815                                struct smb_filename *smb_dname,
2816                                uint32 file_attributes)
2817 {
2818         mode_t mode;
2819         char *parent_dir = NULL;
2820         NTSTATUS status;
2821         bool posix_open = false;
2822         bool need_re_stat = false;
2823         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2824
2825         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2826                 DEBUG(5,("mkdir_internal: failing share access "
2827                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2828                 return NT_STATUS_ACCESS_DENIED;
2829         }
2830
2831         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2832                             NULL)) {
2833                 return NT_STATUS_NO_MEMORY;
2834         }
2835
2836         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2837                 posix_open = true;
2838                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2839         } else {
2840                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2841         }
2842
2843         status = check_parent_access(conn,
2844                                         smb_dname,
2845                                         access_mask);
2846         if(!NT_STATUS_IS_OK(status)) {
2847                 DEBUG(5,("mkdir_internal: check_parent_access "
2848                         "on directory %s for path %s returned %s\n",
2849                         parent_dir,
2850                         smb_dname->base_name,
2851                         nt_errstr(status) ));
2852                 return status;
2853         }
2854
2855         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2856                 return map_nt_error_from_unix(errno);
2857         }
2858
2859         /* Ensure we're checking for a symlink here.... */
2860         /* We don't want to get caught by a symlink racer. */
2861
2862         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2863                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2864                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2865                 return map_nt_error_from_unix(errno);
2866         }
2867
2868         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2869                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2870                           smb_fname_str_dbg(smb_dname)));
2871                 return NT_STATUS_NOT_A_DIRECTORY;
2872         }
2873
2874         if (lp_store_dos_attributes(SNUM(conn))) {
2875                 if (!posix_open) {
2876                         file_set_dosmode(conn, smb_dname,
2877                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2878                                          parent_dir, true);
2879                 }
2880         }
2881
2882         if (lp_inherit_perms(SNUM(conn))) {
2883                 inherit_access_posix_acl(conn, parent_dir,
2884                                          smb_dname->base_name, mode);
2885                 need_re_stat = true;
2886         }
2887
2888         if (!posix_open) {
2889                 /*
2890                  * Check if high bits should have been set,
2891                  * then (if bits are missing): add them.
2892                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2893                  * dir.
2894                  */
2895                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2896                     (mode & ~smb_dname->st.st_ex_mode)) {
2897                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2898                                       (smb_dname->st.st_ex_mode |
2899                                           (mode & ~smb_dname->st.st_ex_mode)));
2900                         need_re_stat = true;
2901                 }
2902         }
2903
2904         /* Change the owner if required. */
2905         if (lp_inherit_owner(SNUM(conn))) {
2906                 change_dir_owner_to_parent(conn, parent_dir,
2907                                            smb_dname->base_name,
2908                                            &smb_dname->st);
2909                 need_re_stat = true;
2910         }
2911
2912         if (need_re_stat) {
2913                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2914                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2915                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2916                         return map_nt_error_from_unix(errno);
2917                 }
2918         }
2919
2920         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2921                      smb_dname->base_name);
2922
2923         return NT_STATUS_OK;
2924 }
2925
2926 /****************************************************************************
2927  Open a directory from an NT SMB call.
2928 ****************************************************************************/
2929
2930 static NTSTATUS open_directory(connection_struct *conn,
2931                                struct smb_request *req,
2932                                struct smb_filename *smb_dname,
2933                                uint32 access_mask,
2934                                uint32 share_access,
2935                                uint32 create_disposition,
2936                                uint32 create_options,
2937                                uint32 file_attributes,
2938                                int *pinfo,
2939                                files_struct **result)
2940 {
2941         files_struct *fsp = NULL;
2942         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2943         struct share_mode_lock *lck = NULL;
2944         NTSTATUS status;
2945         struct timespec mtimespec;
2946         int info = 0;
2947
2948         if (is_ntfs_stream_smb_fname(smb_dname)) {
2949                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2950                           smb_fname_str_dbg(smb_dname)));
2951                 return NT_STATUS_NOT_A_DIRECTORY;
2952         }
2953
2954         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2955                 /* Ensure we have a directory attribute. */
2956                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2957         }
2958
2959         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2960                  "share_access = 0x%x create_options = 0x%x, "
2961                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2962                  smb_fname_str_dbg(smb_dname),
2963                  (unsigned int)access_mask,
2964                  (unsigned int)share_access,
2965                  (unsigned int)create_options,
2966                  (unsigned int)create_disposition,
2967                  (unsigned int)file_attributes));
2968
2969         status = smbd_calculate_access_mask(conn, smb_dname, false,
2970                                             access_mask, &access_mask);
2971         if (!NT_STATUS_IS_OK(status)) {
2972                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2973                         "on file %s returned %s\n",
2974                         smb_fname_str_dbg(smb_dname),
2975                         nt_errstr(status)));
2976                 return status;
2977         }
2978
2979         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2980                         !security_token_has_privilege(get_current_nttok(conn),
2981                                         SEC_PRIV_SECURITY)) {
2982                 DEBUG(10, ("open_directory: open on %s "
2983                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2984                         smb_fname_str_dbg(smb_dname)));
2985                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2986         }
2987
2988         switch( create_disposition ) {
2989                 case FILE_OPEN:
2990
2991                         if (!dir_existed) {
2992                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2993                         }
2994
2995                         info = FILE_WAS_OPENED;
2996                         break;
2997
2998                 case FILE_CREATE:
2999
3000                         /* If directory exists error. If directory doesn't
3001                          * exist create. */
3002
3003                         if (dir_existed) {
3004                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
3005                                 DEBUG(2, ("open_directory: unable to create "
3006                                           "%s. Error was %s\n",
3007                                           smb_fname_str_dbg(smb_dname),
3008                                           nt_errstr(status)));
3009                                 return status;
3010                         }
3011
3012                         status = mkdir_internal(conn, smb_dname,
3013                                                 file_attributes);
3014
3015                         if (!NT_STATUS_IS_OK(status)) {
3016                                 DEBUG(2, ("open_directory: unable to create "
3017                                           "%s. Error was %s\n",
3018                                           smb_fname_str_dbg(smb_dname),
3019                                           nt_errstr(status)));
3020                                 return status;
3021                         }
3022
3023                         info = FILE_WAS_CREATED;
3024                         break;
3025
3026                 case FILE_OPEN_IF:
3027                         /*
3028                          * If directory exists open. If directory doesn't
3029                          * exist create.
3030                          */
3031
3032                         if (dir_existed) {
3033                                 status = NT_STATUS_OK;
3034                                 info = FILE_WAS_OPENED;
3035                         } else {
3036                                 status = mkdir_internal(conn, smb_dname,
3037                                                 file_attributes);
3038
3039                                 if (NT_STATUS_IS_OK(status)) {
3040                                         info = FILE_WAS_CREATED;
3041                                 } else {
3042                                         /* Cope with create race. */
3043                                         if (!NT_STATUS_EQUAL(status,
3044                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3045                                                 DEBUG(2, ("open_directory: unable to create "
3046                                                         "%s. Error was %s\n",
3047                                                         smb_fname_str_dbg(smb_dname),
3048                                                         nt_errstr(status)));
3049                                                 return status;
3050                                         }
3051                                         info = FILE_WAS_OPENED;
3052                                 }
3053                         }
3054
3055                         break;
3056
3057                 case FILE_SUPERSEDE:
3058                 case FILE_OVERWRITE:
3059                 case FILE_OVERWRITE_IF:
3060                 default:
3061                         DEBUG(5,("open_directory: invalid create_disposition "
3062                                  "0x%x for directory %s\n",
3063                                  (unsigned int)create_disposition,
3064                                  smb_fname_str_dbg(smb_dname)));
3065                         return NT_STATUS_INVALID_PARAMETER;
3066         }
3067
3068         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3069                 DEBUG(5,("open_directory: %s is not a directory !\n",
3070                          smb_fname_str_dbg(smb_dname)));
3071                 return NT_STATUS_NOT_A_DIRECTORY;
3072         }
3073
3074         if (info == FILE_WAS_OPENED) {
3075                 status = smbd_check_access_rights(conn,
3076                                                 smb_dname,
3077                                                 false,
3078                                                 access_mask);
3079                 if (!NT_STATUS_IS_OK(status)) {
3080                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3081                                 "file %s failed with %s\n",
3082                                 smb_fname_str_dbg(smb_dname),
3083                                 nt_errstr(status)));
3084                         return status;
3085                 }
3086         }
3087
3088         status = file_new(req, conn, &fsp);
3089         if(!NT_STATUS_IS_OK(status)) {
3090                 return status;
3091         }
3092
3093         /*
3094          * Setup the files_struct for it.
3095          */
3096
3097         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3098         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3099         fsp->file_pid = req ? req->smbpid : 0;
3100         fsp->can_lock = False;
3101         fsp->can_read = False;
3102         fsp->can_write = False;
3103
3104         fsp->share_access = share_access;
3105         fsp->fh->private_options = 0;
3106         /*
3107          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3108          */
3109         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3110         fsp->print_file = NULL;
3111         fsp->modified = False;
3112         fsp->oplock_type = NO_OPLOCK;
3113         fsp->sent_oplock_break = NO_BREAK_SENT;
3114         fsp->is_directory = True;
3115         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3116         status = fsp_set_smb_fname(fsp, smb_dname);
3117         if (!NT_STATUS_IS_OK(status)) {
3118                 file_free(req, fsp);
3119                 return status;
3120         }
3121
3122         mtimespec = smb_dname->st.st_ex_mtime;
3123
3124 #ifdef O_DIRECTORY
3125         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3126 #else
3127         /* POSIX allows us to open a directory with O_RDONLY. */
3128         status = fd_open(conn, fsp, O_RDONLY, 0);
3129 #endif
3130         if (!NT_STATUS_IS_OK(status)) {
3131                 DEBUG(5, ("open_directory: Could not open fd for "
3132                         "%s (%s)\n",
3133                         smb_fname_str_dbg(smb_dname),
3134                         nt_errstr(status)));
3135                 file_free(req, fsp);
3136                 return status;
3137         }
3138
3139         status = vfs_stat_fsp(fsp);
3140         if (!NT_STATUS_IS_OK(status)) {
3141                 fd_close(fsp);
3142                 file_free(req, fsp);
3143                 return status;
3144         }
3145
3146         /* Ensure there was no race condition. */
3147         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3148                 DEBUG(5,("open_directory: stat struct differs for "
3149                         "directory %s.\n",
3150                         smb_fname_str_dbg(smb_dname)));
3151                 fd_close(fsp);
3152                 file_free(req, fsp);
3153                 return NT_STATUS_ACCESS_DENIED;
3154         }
3155
3156         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3157                                   conn->connectpath, smb_dname,
3158                                   &mtimespec);
3159
3160         if (lck == NULL) {
3161                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3162                           "%s\n", smb_fname_str_dbg(smb_dname)));
3163                 fd_close(fsp);
3164                 file_free(req, fsp);
3165                 return NT_STATUS_SHARING_VIOLATION;
3166         }
3167
3168         if (has_delete_on_close(lck, fsp->name_hash)) {
3169                 TALLOC_FREE(lck);
3170                 fd_close(fsp);
3171                 file_free(req, fsp);
3172                 return NT_STATUS_DELETE_PENDING;
3173         }
3174
3175         status = open_mode_check(conn, lck,
3176                                 access_mask, share_access,
3177                                  create_options, &dir_existed);
3178
3179         if (!NT_STATUS_IS_OK(status)) {
3180                 TALLOC_FREE(lck);
3181                 fd_close(fsp);
3182                 file_free(req, fsp);
3183                 return status;
3184         }
3185
3186         if (!set_share_mode(lck, fsp, get_current_uid(conn),
3187                             req ? req->mid : 0, NO_OPLOCK)) {
3188                 TALLOC_FREE(lck);
3189                 fd_close(fsp);
3190                 file_free(req, fsp);
3191                 return NT_STATUS_NO_MEMORY;
3192         }
3193
3194         /* For directories the delete on close bit at open time seems
3195            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3196         if (create_options & FILE_DELETE_ON_CLOSE) {
3197                 status = can_set_delete_on_close(fsp, 0);
3198                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3199                         del_share_mode(lck, fsp);
3200                         TALLOC_FREE(lck);
3201                         fd_close(fsp);
3202                         file_free(req, fsp);
3203                         return status;
3204                 }
3205
3206                 if (NT_STATUS_IS_OK(status)) {
3207                         /* Note that here we set the *inital* delete on close flag,
3208                            not the regular one. The magic gets handled in close. */
3209                         fsp->initial_delete_on_close = True;
3210                 }
3211         }
3212
3213         TALLOC_FREE(lck);
3214
3215         if (pinfo) {
3216                 *pinfo = info;
3217         }
3218
3219         *result = fsp;
3220         return NT_STATUS_OK;
3221 }
3222
3223 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3224                           struct smb_filename *smb_dname)
3225 {
3226         NTSTATUS status;
3227         files_struct *fsp;
3228
3229         status = SMB_VFS_CREATE_FILE(
3230                 conn,                                   /* conn */
3231                 req,                                    /* req */
3232                 0,                                      /* root_dir_fid */
3233                 smb_dname,                              /* fname */
3234                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3235                 FILE_SHARE_NONE,                        /* share_access */
3236                 FILE_CREATE,                            /* create_disposition*/
3237                 FILE_DIRECTORY_FILE,                    /* create_options */
3238                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3239                 0,                                      /* oplock_request */
3240                 0,                                      /* allocation_size */
3241                 0,                                      /* private_flags */
3242                 NULL,                                   /* sd */
3243                 NULL,                                   /* ea_list */
3244                 &fsp,                                   /* result */
3245                 NULL);                                  /* pinfo */
3246
3247         if (NT_STATUS_IS_OK(status)) {
3248                 close_file(req, fsp, NORMAL_CLOSE);
3249         }
3250
3251         return status;
3252 }
3253
3254 /****************************************************************************
3255  Receive notification that one of our open files has been renamed by another
3256  smbd process.
3257 ****************************************************************************/
3258
3259 void msg_file_was_renamed(struct messaging_context *msg,
3260                           void *private_data,
3261                           uint32_t msg_type,
3262                           struct server_id server_id,
3263                           DATA_BLOB *data)
3264 {
3265         files_struct *fsp;
3266         char *frm = (char *)data->data;
3267         struct file_id id;
3268         const char *sharepath;
3269         const char *base_name;
3270         const char *stream_name;
3271         struct smb_filename *smb_fname = NULL;
3272         size_t sp_len, bn_len;
3273         NTSTATUS status;
3274         struct smbd_server_connection *sconn =
3275                 talloc_get_type_abort(private_data,
3276                 struct smbd_server_connection);
3277
3278         if (data->data == NULL
3279             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3280                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3281                           (int)data->length));
3282                 return;
3283         }
3284
3285         /* Unpack the message. */
3286         pull_file_id_24(frm, &id);
3287         sharepath = &frm[24];
3288         sp_len = strlen(sharepath);
3289         base_name = sharepath + sp_len + 1;
3290         bn_len = strlen(base_name);
3291         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3292
3293         /* stream_name must always be NULL if there is no stream. */
3294         if (stream_name[0] == '\0') {
3295                 stream_name = NULL;
3296         }
3297
3298         smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3299                                         stream_name, NULL);
3300         if (smb_fname == NULL) {
3301                 return;
3302         }
3303
3304         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3305                 "file_id %s\n",
3306                 sharepath, smb_fname_str_dbg(smb_fname),
3307                 file_id_string_tos(&id)));
3308
3309         for(fsp = file_find_di_first(sconn, id); fsp;
3310             fsp = file_find_di_next(fsp)) {
3311                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3312
3313                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3314                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3315                                 smb_fname_str_dbg(smb_fname)));
3316                         status = fsp_set_smb_fname(fsp, smb_fname);
3317                         if (!NT_STATUS_IS_OK(status)) {
3318                                 goto out;
3319                         }
3320                 } else {
3321                         /* TODO. JRA. */
3322                         /* Now we have the complete path we can work out if this is
3323                            actually within this share and adjust newname accordingly. */
3324                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3325                                 "not sharepath %s) "
3326                                 "%s from %s -> %s\n",
3327                                 fsp->conn->connectpath,
3328                                 sharepath,
3329                                 fsp_fnum_dbg(fsp),
3330                                 fsp_str_dbg(fsp),
3331                                 smb_fname_str_dbg(smb_fname)));
3332                 }
3333         }
3334  out:
3335         TALLOC_FREE(smb_fname);
3336         return;
3337 }
3338
3339 /*
3340  * If a main file is opened for delete, all streams need to be checked for
3341  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3342  * If that works, delete them all by setting the delete on close and close.
3343  */
3344
3345 NTSTATUS open_streams_for_delete(connection_struct *conn,
3346                                         const char *fname)
3347 {
3348         struct stream_struct *stream_info = NULL;
3349         files_struct **streams = NULL;
3350         int i;
3351         unsigned int num_streams = 0;
3352         TALLOC_CTX *frame = talloc_stackframe();
3353         NTSTATUS status;
3354
3355         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3356                                 &num_streams, &stream_info);
3357
3358         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3359             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3360                 DEBUG(10, ("no streams around\n"));
3361                 TALLOC_FREE(frame);
3362                 return NT_STATUS_OK;
3363         }
3364
3365         if (!NT_STATUS_IS_OK(status)) {
3366                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3367                            nt_errstr(status)));
3368                 goto fail;
3369         }
3370
3371         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3372                    num_streams));
3373
3374         if (num_streams == 0) {
3375                 TALLOC_FREE(frame);
3376                 return NT_STATUS_OK;
3377         }
3378
3379         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3380         if (streams == NULL) {
3381                 DEBUG(0, ("talloc failed\n"));
3382                 status = NT_STATUS_NO_MEMORY;
3383                 goto fail;
3384         }
3385
3386         for (i=0; i<num_streams; i++) {
3387                 struct smb_filename *smb_fname;
3388
3389                 if (strequal(stream_info[i].name, "::$DATA")) {
3390                         streams[i] = NULL;
3391                         continue;
3392                 }
3393
3394                 smb_fname = synthetic_smb_fname(
3395                         talloc_tos(), fname, stream_info[i].name, NULL);
3396                 if (smb_fname == NULL) {
3397                         status = NT_STATUS_NO_MEMORY;
3398                         goto fail;
3399                 }
3400
3401                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3402                         DEBUG(10, ("Unable to stat stream: %s\n",
3403                                    smb_fname_str_dbg(smb_fname)));
3404                 }
3405
3406                 status = SMB_VFS_CREATE_FILE(
3407                          conn,                  /* conn */
3408                          NULL,                  /* req */
3409                          0,                     /* root_dir_fid */
3410                          smb_fname,             /* fname */
3411                          DELETE_ACCESS,         /* access_mask */
3412                          (FILE_SHARE_READ |     /* share_access */
3413                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3414                          FILE_OPEN,             /* create_disposition*/
3415                          0,                     /* create_options */
3416                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3417                          0,                     /* oplock_request */
3418                          0,                     /* allocation_size */
3419                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3420                          NULL,                  /* sd */
3421                          NULL,                  /* ea_list */
3422                          &streams[i],           /* result */
3423                          NULL);                 /* pinfo */
3424
3425                 if (!NT_STATUS_IS_OK(status)) {
3426                         DEBUG(10, ("Could not open stream %s: %s\n",
3427                                    smb_fname_str_dbg(smb_fname),
3428                                    nt_errstr(status)));
3429
3430                         TALLOC_FREE(smb_fname);
3431                         break;
3432                 }
3433                 TALLOC_FREE(smb_fname);
3434         }
3435
3436         /*
3437          * don't touch the variable "status" beyond this point :-)
3438          */
3439
3440         for (i -= 1 ; i >= 0; i--) {
3441                 if (streams[i] == NULL) {
3442                         continue;
3443                 }
3444
3445                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3446                            fsp_str_dbg(streams[i])));
3447                 close_file(NULL, streams[i], NORMAL_CLOSE);
3448         }
3449
3450  fail:
3451         TALLOC_FREE(frame);
3452         return status;
3453 }
3454
3455 /*********************************************************************
3456  Create a default ACL by inheriting from the parent. If no inheritance
3457  from the parent available, don't set anything. This will leave the actual
3458  permissions the new file or directory already got from the filesystem
3459  as the NT ACL when read.
3460 *********************************************************************/
3461
3462 static NTSTATUS inherit_new_acl(files_struct *fsp)
3463 {
3464         TALLOC_CTX *frame = talloc_stackframe();
3465         char *parent_name = NULL;
3466         struct security_descriptor *parent_desc = NULL;
3467         NTSTATUS status = NT_STATUS_OK;
3468         struct security_descriptor *psd = NULL;
3469         const struct dom_sid *owner_sid = NULL;
3470         const struct dom_sid *group_sid = NULL;
3471         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3472         struct security_token *token = fsp->conn->session_info->security_token;
3473         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3474         bool inheritable_components = false;
3475         bool try_builtin_administrators = false;
3476         const struct dom_sid *BA_U_sid = NULL;
3477         const struct dom_sid *BA_G_sid = NULL;
3478         bool try_system = false;
3479         const struct dom_sid *SY_U_sid = NULL;
3480         const struct dom_sid *SY_G_sid = NULL;
3481         size_t size = 0;
3482
3483         if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3484                 TALLOC_FREE(frame);
3485                 return NT_STATUS_NO_MEMORY;
3486         }
3487
3488         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3489                                     parent_name,
3490                                     (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3491                                     frame,
3492                                     &parent_desc);
3493         if (!NT_STATUS_IS_OK(status)) {
3494                 TALLOC_FREE(frame);
3495                 return status;
3496         }
3497
3498         inheritable_components = sd_has_inheritable_components(parent_desc,
3499                                         fsp->is_directory);
3500
3501         if (!inheritable_components && !inherit_owner) {
3502                 TALLOC_FREE(frame);
3503                 /* Nothing to inherit and not setting owner. */
3504                 return NT_STATUS_OK;
3505         }
3506
3507         /* Create an inherited descriptor from the parent. */
3508
3509         if (DEBUGLEVEL >= 10) {
3510                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3511                         fsp_str_dbg(fsp) ));
3512                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3513         }
3514
3515         /* Inherit from parent descriptor if "inherit owner" set. */
3516         if (inherit_owner) {
3517                 owner_sid = parent_desc->owner_sid;
3518                 group_sid = parent_desc->group_sid;
3519         }
3520
3521         if (owner_sid == NULL) {
3522                 if (security_token_has_builtin_administrators(token)) {
3523                         try_builtin_administrators = true;
3524                 } else if (security_token_is_system(token)) {
3525                         try_builtin_administrators = true;
3526                         try_system = true;
3527                 }
3528         }
3529
3530         if (group_sid == NULL &&
3531             token->num_sids == PRIMARY_GROUP_SID_INDEX)
3532         {
3533                 if (security_token_is_system(token)) {
3534                         try_builtin_administrators = true;
3535                         try_system = true;
3536                 }
3537         }
3538
3539         if (try_builtin_administrators) {
3540                 struct unixid ids;
3541                 bool ok;
3542
3543                 ZERO_STRUCT(ids);
3544                 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
3545                 if (ok) {
3546                         switch (ids.type) {
3547                         case ID_TYPE_BOTH:
3548                                 BA_U_sid = &global_sid_Builtin_Administrators;
3549                                 BA_G_sid = &global_sid_Builtin_Administrators;
3550                                 break;
3551                         case ID_TYPE_UID:
3552                                 BA_U_sid = &global_sid_Builtin_Administrators;
3553                                 break;
3554                         case ID_TYPE_GID:
3555                                 BA_G_sid = &global_sid_Builtin_Administrators;
3556                                 break;
3557                         default:
3558                                 break;
3559                         }
3560                 }
3561         }
3562
3563         if (try_system) {
3564                 struct unixid ids;
3565                 bool ok;
3566
3567                 ZERO_STRUCT(ids);
3568                 ok = sids_to_unixids(&global_sid_System, 1, &ids);
3569                 if (ok) {
3570                         switch (ids.type) {
3571                         case ID_TYPE_BOTH:
3572                                 SY_U_sid = &global_sid_System;
3573                                 SY_G_sid = &global_sid_System;
3574                                 break;
3575                         case ID_TYPE_UID:
3576                                 SY_U_sid = &global_sid_System;
3577                                 break;
3578                         case ID_TYPE_GID:
3579                                 SY_G_sid = &global_sid_System;
3580                                 break;
3581                         default:
3582                                 break;
3583                         }
3584                 }
3585         }
3586
3587         if (owner_sid == NULL) {
3588                 owner_sid = BA_U_sid;
3589         }
3590
3591         if (owner_sid == NULL) {
3592                 owner_sid = SY_U_sid;
3593         }
3594
3595         if (group_sid == NULL) {
3596                 group_sid = SY_G_sid;
3597         }
3598
3599         if (try_system && group_sid == NULL) {
3600                 group_sid = BA_G_sid;
3601         }
3602
3603         if (owner_sid == NULL) {
3604                 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3605         }
3606         if (group_sid == NULL) {
3607                 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
3608                         group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3609                 } else {
3610                         group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
3611                 }
3612         }
3613
3614         status = se_create_child_secdesc(frame,
3615                         &psd,
3616                         &size,
3617                         parent_desc,
3618                         owner_sid,
3619                         group_sid,
3620                         fsp->is_directory);
3621         if (!NT_STATUS_IS_OK(status)) {
3622                 TALLOC_FREE(frame);
3623                 return status;
3624         }
3625
3626         /* If inheritable_components == false,
3627            se_create_child_secdesc()
3628            creates a security desriptor with a NULL dacl
3629            entry, but with SEC_DESC_DACL_PRESENT. We need
3630            to remove that flag. */
3631
3632         if (!inheritable_components) {
3633                 security_info_sent &= ~SECINFO_DACL;
3634                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3635         }
3636
3637         if (DEBUGLEVEL >= 10) {
3638                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3639                         fsp_str_dbg(fsp) ));
3640                 NDR_PRINT_DEBUG(security_descriptor, psd);
3641         }
3642
3643         if (inherit_owner) {
3644                 /* We need to be root to force this. */
3645                 become_root();
3646         }
3647         status = SMB_VFS_FSET_NT_ACL(fsp,
3648                         security_info_sent,
3649                         psd);
3650         if (inherit_owner) {
3651                 unbecome_root();
3652         }
3653         TALLOC_FREE(frame);
3654         return status;
3655 }
3656
3657 /*
3658  * Wrapper around open_file_ntcreate and open_directory
3659  */
3660
3661 static NTSTATUS create_file_unixpath(connection_struct *conn,
3662                                      struct smb_request *req,
3663                                      struct smb_filename *smb_fname,
3664                                      uint32_t access_mask,
3665                                      uint32_t share_access,
3666                                      uint32_t create_disposition,
3667                                      uint32_t create_options,
3668                                      uint32_t file_attributes,
3669                                      uint32_t oplock_request,
3670                                      uint64_t allocation_size,
3671                                      uint32_t private_flags,
3672                                      struct security_descriptor *sd,
3673                                      struct ea_list *ea_list,
3674
3675                                      files_struct **result,
3676                                      int *pinfo)
3677 {
3678         int info = FILE_WAS_OPENED;
3679         files_struct *base_fsp = NULL;
3680         files_struct *fsp = NULL;
3681         NTSTATUS status;
3682
3683         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3684                   "file_attributes = 0x%x, share_access = 0x%x, "
3685                   "create_disposition = 0x%x create_options = 0x%x "
3686                   "oplock_request = 0x%x private_flags = 0x%x "
3687                   "ea_list = 0x%p, sd = 0x%p, "
3688                   "fname = %s\n",
3689                   (unsigned int)access_mask,
3690                   (unsigned int)file_attributes,
3691                   (unsigned int)share_access,
3692                   (unsigned int)create_disposition,
3693                   (unsigned int)create_options,
3694                   (unsigned int)oplock_request,
3695                   (unsigned int)private_flags,
3696                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3697
3698         if (create_options & FILE_OPEN_BY_FILE_ID) {
3699                 status = NT_STATUS_NOT_SUPPORTED;
3700                 goto fail;
3701         }
3702
3703         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3704                 status = NT_STATUS_INVALID_PARAMETER;
3705                 goto fail;
3706         }
3707
3708         if (req == NULL) {
3709                 oplock_request |= INTERNAL_OPEN_ONLY;
3710         }
3711
3712         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3713             && (access_mask & DELETE_ACCESS)
3714             && !is_ntfs_stream_smb_fname(smb_fname)) {
3715                 /*
3716                  * We can't open a file with DELETE access if any of the
3717                  * streams is open without FILE_SHARE_DELETE
3718                  */
3719                 status = open_streams_for_delete(conn, smb_fname->base_name);
3720
3721                 if (!NT_STATUS_IS_OK(status)) {
3722                         goto fail;
3723                 }
3724         }
3725
3726         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3727                         !security_token_has_privilege(get_current_nttok(conn),
3728                                         SEC_PRIV_SECURITY)) {
3729                 DEBUG(10, ("create_file_unixpath: open on %s "
3730                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3731                         smb_fname_str_dbg(smb_fname)));
3732                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3733                 goto fail;
3734         }
3735
3736         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3737             && is_ntfs_stream_smb_fname(smb_fname)
3738             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3739                 uint32 base_create_disposition;
3740                 struct smb_filename *smb_fname_base = NULL;
3741
3742                 if (create_options & FILE_DIRECTORY_FILE) {
3743                         status = NT_STATUS_NOT_A_DIRECTORY;
3744                         goto fail;
3745                 }
3746
3747                 switch (create_disposition) {
3748                 case FILE_OPEN:
3749                         base_create_disposition = FILE_OPEN;
3750                         break;
3751                 default:
3752                         base_create_disposition = FILE_OPEN_IF;
3753                         break;
3754                 }
3755
3756                 /* Create an smb_filename with stream_name == NULL. */
3757                 smb_fname_base = synthetic_smb_fname(talloc_tos(),
3758                                                      smb_fname->base_name,
3759                                                      NULL, NULL);
3760                 if (smb_fname_base == NULL) {
3761                         status = NT_STATUS_NO_MEMORY;
3762                         goto fail;
3763                 }
3764
3765                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3766                         DEBUG(10, ("Unable to stat stream: %s\n",
3767                                    smb_fname_str_dbg(smb_fname_base)));
3768                 }
3769
3770                 /* Open the base file. */
3771                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3772                                               FILE_SHARE_READ
3773                                               | FILE_SHARE_WRITE
3774                                               | FILE_SHARE_DELETE,
3775                                               base_create_disposition,
3776                                               0, 0, 0, 0, 0, NULL, NULL,
3777                                               &base_fsp, NULL);
3778                 TALLOC_FREE(smb_fname_base);
3779
3780                 if (!NT_STATUS_IS_OK(status)) {
3781                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3782                                    "%s\n", smb_fname->base_name,
3783                                    nt_errstr(status)));
3784                         goto fail;
3785                 }
3786                 /* we don't need to low level fd */
3787                 fd_close(base_fsp);
3788         }
3789
3790         /*
3791          * If it's a request for a directory open, deal with it separately.
3792          */
3793
3794         if (create_options & FILE_DIRECTORY_FILE) {
3795
3796                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3797                         status = NT_STATUS_INVALID_PARAMETER;
3798                         goto fail;
3799                 }
3800
3801                 /* Can't open a temp directory. IFS kit test. */
3802                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3803                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3804                         status = NT_STATUS_INVALID_PARAMETER;
3805                         goto fail;
3806                 }
3807
3808                 /*
3809                  * We will get a create directory here if the Win32
3810                  * app specified a security descriptor in the
3811                  * CreateDirectory() call.
3812                  */
3813
3814                 oplock_request = 0;
3815                 status = open_directory(
3816                         conn, req, smb_fname, access_mask, share_access,
3817                         create_disposition, create_options, file_attributes,
3818                         &info, &fsp);
3819         } else {
3820
3821                 /*
3822                  * Ordinary file case.
3823                  */
3824
3825                 status = file_new(req, conn, &fsp);
3826                 if(!NT_STATUS_IS_OK(status)) {
3827                         goto fail;
3828                 }
3829
3830                 status = fsp_set_smb_fname(fsp, smb_fname);
3831                 if (!NT_STATUS_IS_OK(status)) {
3832                         goto fail;
3833                 }
3834
3835                 if (base_fsp) {
3836                         /*
3837                          * We're opening the stream element of a
3838                          * base_fsp we already opened. Set up the
3839                          * base_fsp pointer.
3840                          */
3841                         fsp->base_fsp = base_fsp;
3842                 }
3843
3844                 if (allocation_size) {
3845                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3846                                                         allocation_size);
3847                 }
3848
3849                 status = open_file_ntcreate(conn,
3850                                             req,
3851                                             access_mask,
3852                                             share_access,
3853                                             create_disposition,
3854                                             create_options,
3855                                             file_attributes,
3856                                             oplock_request,
3857                                             private_flags,
3858                                             &info,
3859                                             fsp);
3860
3861                 if(!NT_STATUS_IS_OK(status)) {
3862                         file_free(req, fsp);
3863                         fsp = NULL;
3864                 }
3865
3866                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3867
3868                         /* A stream open never opens a directory */
3869
3870                         if (base_fsp) {
3871                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3872                                 goto fail;
3873                         }
3874
3875                         /*
3876                          * Fail the open if it was explicitly a non-directory
3877                          * file.
3878                          */
3879
3880                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3881                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3882                                 goto fail;
3883                         }
3884
3885                         oplock_request = 0;
3886                         status = open_directory(
3887                                 conn, req, smb_fname, access_mask,
3888                                 share_access, create_disposition,
3889                                 create_options, file_attributes,
3890                                 &info, &fsp);
3891                 }
3892         }
3893
3894         if (!NT_STATUS_IS_OK(status)) {
3895                 goto fail;
3896         }
3897
3898         fsp->base_fsp = base_fsp;
3899
3900         if ((ea_list != NULL) &&
3901             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3902                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3903                 if (!NT_STATUS_IS_OK(status)) {
3904                         goto fail;
3905                 }
3906         }
3907
3908         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3909                 status = NT_STATUS_ACCESS_DENIED;
3910                 goto fail;
3911         }
3912
3913         /* Save the requested allocation size. */
3914         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3915                 if (allocation_size
3916                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3917                         fsp->initial_allocation_size = smb_roundup(
3918                                 fsp->conn, allocation_size);
3919                         if (fsp->is_directory) {
3920                                 /* Can't set allocation size on a directory. */
3921                                 status = NT_STATUS_ACCESS_DENIED;
3922                                 goto fail;
3923                         }
3924                         if (vfs_allocate_file_space(
3925                                     fsp, fsp->initial_allocation_size) == -1) {
3926                                 status = NT_STATUS_DISK_FULL;
3927                                 goto fail;
3928                         }
3929                 } else {
3930                         fsp->initial_allocation_size = smb_roundup(
3931                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3932                 }
3933         } else {
3934                 fsp->initial_allocation_size = 0;
3935         }
3936
3937         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3938                                 fsp->base_fsp == NULL) {
3939                 if (sd != NULL) {
3940                         /*
3941                          * According to the MS documentation, the only time the security
3942                          * descriptor is applied to the opened file is iff we *created* the
3943                          * file; an existing file stays the same.
3944                          *
3945                          * Also, it seems (from observation) that you can open the file with
3946                          * any access mask but you can still write the sd. We need to override
3947                          * the granted access before we call set_sd
3948                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3949                          */
3950
3951                         uint32_t sec_info_sent;
3952                         uint32_t saved_access_mask = fsp->access_mask;
3953
3954                         sec_info_sent = get_sec_info(sd);
3955
3956                         fsp->access_mask = FILE_GENERIC_ALL;
3957
3958                         if (sec_info_sent & (SECINFO_OWNER|
3959                                                 SECINFO_GROUP|
3960                                                 SECINFO_DACL|
3961                                                 SECINFO_SACL)) {
3962                                 status = set_sd(fsp, sd, sec_info_sent);
3963                         }
3964
3965                         fsp->access_mask = saved_access_mask;
3966
3967                         if (!NT_STATUS_IS_OK(status)) {
3968                                 goto fail;
3969                         }
3970                 } else if (lp_inherit_acls(SNUM(conn))) {
3971                         /* Inherit from parent. Errors here are not fatal. */
3972                         status = inherit_new_acl(fsp);
3973                         if (!NT_STATUS_IS_OK(status)) {
3974                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3975                                         fsp_str_dbg(fsp),
3976                                         nt_errstr(status) ));
3977                         }
3978                 }
3979         }
3980
3981         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3982
3983         *result = fsp;
3984         if (pinfo != NULL) {
3985                 *pinfo = info;
3986         }
3987
3988         smb_fname->st = fsp->fsp_name->st;
3989
3990         return NT_STATUS_OK;
3991
3992  fail:
3993         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3994
3995         if (fsp != NULL) {
3996                 if (base_fsp && fsp->base_fsp == base_fsp) {
3997                         /*
3998                          * The close_file below will close
3999                          * fsp->base_fsp.
4000                          */
4001                         base_fsp = NULL;
4002                 }
4003                 close_file(req, fsp, ERROR_CLOSE);
4004                 fsp = NULL;
4005         }
4006         if (base_fsp != NULL) {
4007                 close_file(req, base_fsp, ERROR_CLOSE);
4008                 base_fsp = NULL;
4009         }
4010         return status;
4011 }
4012
4013 /*
4014  * Calculate the full path name given a relative fid.
4015  */
4016 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4017                                    struct smb_request *req,
4018                                    uint16_t root_dir_fid,
4019                                    const struct smb_filename *smb_fname,
4020                                    struct smb_filename **smb_fname_out)
4021 {
4022         files_struct *dir_fsp;
4023         char *parent_fname = NULL;
4024         char *new_base_name = NULL;
4025         NTSTATUS status;
4026
4027         if (root_dir_fid == 0 || !smb_fname) {
4028                 status = NT_STATUS_INTERNAL_ERROR;
4029                 goto out;
4030         }
4031
4032         dir_fsp = file_fsp(req, root_dir_fid);
4033
4034         if (dir_fsp == NULL) {
4035                 status = NT_STATUS_INVALID_HANDLE;
4036                 goto out;
4037         }
4038
4039         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4040                 status = NT_STATUS_INVALID_HANDLE;
4041                 goto out;
4042         }
4043
4044         if (!dir_fsp->is_directory) {
4045
4046                 /*
4047                  * Check to see if this is a mac fork of some kind.
4048                  */
4049
4050                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4051                     is_ntfs_stream_smb_fname(smb_fname)) {
4052                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4053                         goto out;
4054                 }
4055
4056                 /*
4057                   we need to handle the case when we get a
4058                   relative open relative to a file and the
4059                   pathname is blank - this is a reopen!
4060                   (hint from demyn plantenberg)
4061                 */
4062
4063                 status = NT_STATUS_INVALID_HANDLE;
4064                 goto out;
4065         }
4066
4067         if (ISDOT(dir_fsp->fsp_name->base_name)) {
4068                 /*
4069                  * We're at the toplevel dir, the final file name
4070                  * must not contain ./, as this is filtered out
4071                  * normally by srvstr_get_path and unix_convert
4072                  * explicitly rejects paths containing ./.
4073                  */
4074                 parent_fname = talloc_strdup(talloc_tos(), "");
4075                 if (parent_fname == NULL) {
4076                         status = NT_STATUS_NO_MEMORY;
4077                         goto out;
4078                 }
4079         } else {
4080                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4081
4082                 /*
4083                  * Copy in the base directory name.
4084                  */
4085
4086                 parent_fname = talloc_array(talloc_tos(), char,
4087                     dir_name_len+2);
4088                 if (parent_fname == NULL) {
4089                         status = NT_STATUS_NO_MEMORY;
4090                         goto out;
4091                 }
4092                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4093                     dir_name_len+1);
4094
4095                 /*
4096                  * Ensure it ends in a '/'.
4097                  * We used TALLOC_SIZE +2 to add space for the '/'.
4098                  */
4099
4100                 if(dir_name_len
4101                     && (parent_fname[dir_name_len-1] != '\\')
4102                     && (parent_fname[dir_name_len-1] != '/')) {
4103                         parent_fname[dir_name_len] = '/';
4104                         parent_fname[dir_name_len+1] = '\0';
4105                 }
4106         }
4107
4108         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4109                                         smb_fname->base_name);
4110         if (new_base_name == NULL) {
4111                 status = NT_STATUS_NO_MEMORY;
4112                 goto out;
4113         }
4114
4115         status = filename_convert(req,
4116                                 conn,
4117                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
4118                                 new_base_name,
4119                                 0,
4120                                 NULL,
4121                                 smb_fname_out);
4122         if (!NT_STATUS_IS_OK(status)) {
4123                 goto out;
4124         }
4125
4126  out:
4127         TALLOC_FREE(parent_fname);
4128         TALLOC_FREE(new_base_name);
4129         return status;
4130 }
4131
4132 NTSTATUS create_file_default(connection_struct *conn,
4133                              struct smb_request *req,
4134                              uint16_t root_dir_fid,
4135                              struct smb_filename *smb_fname,
4136                              uint32_t access_mask,
4137                              uint32_t share_access,
4138                              uint32_t create_disposition,
4139                              uint32_t create_options,
4140                              uint32_t file_attributes,
4141                              uint32_t oplock_request,
4142                              uint64_t allocation_size,
4143                              uint32_t private_flags,
4144                              struct security_descriptor *sd,
4145                              struct ea_list *ea_list,
4146                              files_struct **result,
4147                              int *pinfo)
4148 {
4149         int info = FILE_WAS_OPENED;
4150         files_struct *fsp = NULL;
4151         NTSTATUS status;
4152         bool stream_name = false;
4153
4154         DEBUG(10,("create_file: access_mask = 0x%x "
4155                   "file_attributes = 0x%x, share_access = 0x%x, "
4156                   "create_disposition = 0x%x create_options = 0x%x "
4157                   "oplock_request = 0x%x "
4158                   "private_flags = 0x%x "
4159                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4160                   "fname = %s\n",
4161                   (unsigned int)access_mask,
4162                   (unsigned int)file_attributes,
4163                   (unsigned int)share_access,
4164                   (unsigned int)create_disposition,
4165                   (unsigned int)create_options,
4166                   (unsigned int)oplock_request,
4167                   (unsigned int)private_flags,
4168                   (unsigned int)root_dir_fid,
4169                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4170
4171         /*
4172          * Calculate the filename from the root_dir_if if necessary.
4173          */
4174
4175         if (root_dir_fid != 0) {
4176                 struct smb_filename *smb_fname_out = NULL;
4177                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4178                                                    smb_fname, &smb_fname_out);
4179                 if (!NT_STATUS_IS_OK(status)) {
4180                         goto fail;
4181                 }
4182                 smb_fname = smb_fname_out;
4183         }
4184
4185         /*
4186          * Check to see if this is a mac fork of some kind.
4187          */
4188
4189         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4190         if (stream_name) {
4191                 enum FAKE_FILE_TYPE fake_file_type;
4192
4193                 fake_file_type = is_fake_file(smb_fname);
4194
4195                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4196
4197                         /*
4198                          * Here we go! support for changing the disk quotas
4199                          * --metze
4200                          *
4201                          * We need to fake up to open this MAGIC QUOTA file
4202                          * and return a valid FID.
4203                          *
4204                          * w2k close this file directly after openening xp
4205                          * also tries a QUERY_FILE_INFO on the file and then
4206                          * close it
4207                          */
4208                         status = open_fake_file(req, conn, req->vuid,
4209                                                 fake_file_type, smb_fname,
4210                                                 access_mask, &fsp);
4211                         if (!NT_STATUS_IS_OK(status)) {
4212                                 goto fail;
4213                         }
4214
4215                         ZERO_STRUCT(smb_fname->st);
4216                         goto done;
4217                 }
4218
4219                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4220                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4221                         goto fail;
4222                 }
4223         }
4224
4225         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4226                 int ret;
4227                 smb_fname->stream_name = NULL;
4228                 /* We have to handle this error here. */
4229                 if (create_options & FILE_DIRECTORY_FILE) {
4230                         status = NT_STATUS_NOT_A_DIRECTORY;
4231                         goto fail;
4232                 }
4233                 if (lp_posix_pathnames()) {
4234                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4235                 } else {
4236                         ret = SMB_VFS_STAT(conn, smb_fname);
4237                 }
4238
4239                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4240                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4241                         goto fail;
4242                 }
4243         }
4244
4245         status = create_file_unixpath(
4246                 conn, req, smb_fname, access_mask, share_access,
4247                 create_disposition, create_options, file_attributes,
4248                 oplock_request, allocation_size, private_flags,
4249                 sd, ea_list,
4250                 &fsp, &info);
4251
4252         if (!NT_STATUS_IS_OK(status)) {
4253                 goto fail;
4254         }
4255
4256  done:
4257         DEBUG(10, ("create_file: info=%d\n", info));
4258
4259         *result = fsp;
4260         if (pinfo != NULL) {
4261                 *pinfo = info;
4262         }
4263         return NT_STATUS_OK;
4264
4265  fail:
4266         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4267
4268         if (fsp != NULL) {
4269                 close_file(req, fsp, ERROR_CLOSE);
4270                 fsp = NULL;
4271         }
4272         return status;
4273 }