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 (((uint16)fsp->oplock_type) != share_entry->op_type) {
1056                 goto panic;
1057         }
1058
1059         return;
1060
1061  panic:
1062         {
1063                 char *str;
1064                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1065                          share_mode_str(talloc_tos(), num, share_entry) ));
1066                 str = talloc_asprintf(talloc_tos(),
1067                         "validate_my_share_entries: "
1068                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1069                          fsp->fsp_name->base_name,
1070                          (unsigned int)fsp->oplock_type,
1071                          (unsigned int)share_entry->op_type );
1072                 smb_panic(str);
1073         }
1074 }
1075 #endif
1076
1077 bool is_stat_open(uint32 access_mask)
1078 {
1079         const uint32_t stat_open_bits =
1080                 (SYNCHRONIZE_ACCESS|
1081                  FILE_READ_ATTRIBUTES|
1082                  FILE_WRITE_ATTRIBUTES);
1083
1084         return (((access_mask &  stat_open_bits) != 0) &&
1085                 ((access_mask & ~stat_open_bits) == 0));
1086 }
1087
1088 static bool has_delete_on_close(struct share_mode_lock *lck,
1089                                 uint32_t name_hash)
1090 {
1091         struct share_mode_data *d = lck->data;
1092         uint32_t i;
1093
1094         if (d->num_share_modes == 0) {
1095                 return false;
1096         }
1097         if (!is_delete_on_close_set(lck, name_hash)) {
1098                 return false;
1099         }
1100         for (i=0; i<d->num_share_modes; i++) {
1101                 if (!share_mode_stale_pid(d, i)) {
1102                         return true;
1103                 }
1104         }
1105         return false;
1106 }
1107
1108 /****************************************************************************
1109  Deal with share modes
1110  Invarient: Share mode must be locked on entry and exit.
1111  Returns -1 on error, or number of share modes on success (may be zero).
1112 ****************************************************************************/
1113
1114 static NTSTATUS open_mode_check(connection_struct *conn,
1115                                 struct share_mode_lock *lck,
1116                                 uint32 access_mask,
1117                                 uint32 share_access)
1118 {
1119         int i;
1120
1121         if(lck->data->num_share_modes == 0) {
1122                 return NT_STATUS_OK;
1123         }
1124
1125         if (is_stat_open(access_mask)) {
1126                 /* Stat open that doesn't trigger oplock breaks or share mode
1127                  * checks... ! JRA. */
1128                 return NT_STATUS_OK;
1129         }
1130
1131         /*
1132          * Check if the share modes will give us access.
1133          */
1134
1135 #if defined(DEVELOPER)
1136         for(i = 0; i < lck->data->num_share_modes; i++) {
1137                 validate_my_share_entries(conn->sconn, i,
1138                                           &lck->data->share_modes[i]);
1139         }
1140 #endif
1141
1142         /* Now we check the share modes, after any oplock breaks. */
1143         for(i = 0; i < lck->data->num_share_modes; i++) {
1144
1145                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1146                         continue;
1147                 }
1148
1149                 /* someone else has a share lock on it, check to see if we can
1150                  * too */
1151                 if (share_conflict(&lck->data->share_modes[i],
1152                                    access_mask, share_access)) {
1153
1154                         if (share_mode_stale_pid(lck->data, i)) {
1155                                 continue;
1156                         }
1157
1158                         return NT_STATUS_SHARING_VIOLATION;
1159                 }
1160         }
1161
1162         return NT_STATUS_OK;
1163 }
1164
1165 /*
1166  * Send a break message to the oplock holder and delay the open for
1167  * our client.
1168  */
1169
1170 static NTSTATUS send_break_message(struct messaging_context *msg_ctx,
1171                                    const struct share_mode_entry *exclusive)
1172 {
1173         NTSTATUS status;
1174         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1175
1176         DEBUG(10, ("Sending break request to PID %s\n",
1177                    procid_str_static(&exclusive->pid)));
1178
1179         /* Create the message. */
1180         share_mode_entry_to_message(msg, exclusive);
1181
1182         status = messaging_send_buf(msg_ctx, exclusive->pid,
1183                                     MSG_SMB_BREAK_REQUEST,
1184                                     (uint8 *)msg, sizeof(msg));
1185         if (!NT_STATUS_IS_OK(status)) {
1186                 DEBUG(3, ("Could not send oplock break message: %s\n",
1187                           nt_errstr(status)));
1188         }
1189
1190         return status;
1191 }
1192
1193 /*
1194  * Do internal consistency checks on the share mode for a file.
1195  */
1196
1197 static bool validate_oplock_types(struct share_mode_lock *lck)
1198 {
1199         struct share_mode_data *d = lck->data;
1200         bool batch = false;
1201         bool ex_or_batch = false;
1202         bool level2 = false;
1203         bool no_oplock = false;
1204         uint32_t num_non_stat_opens = 0;
1205         uint32_t i;
1206
1207         for (i=0; i<d->num_share_modes; i++) {
1208                 struct share_mode_entry *e = &d->share_modes[i];
1209
1210                 if (!is_valid_share_mode_entry(e)) {
1211                         continue;
1212                 }
1213
1214                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1215                         /* We ignore stat opens in the table - they
1216                            always have NO_OPLOCK and never get or
1217                            cause breaks. JRA. */
1218                         continue;
1219                 }
1220
1221                 num_non_stat_opens += 1;
1222
1223                 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1224                         /* batch - can only be one. */
1225                         if (share_mode_stale_pid(d, i)) {
1226                                 DEBUG(10, ("Found stale batch oplock\n"));
1227                                 continue;
1228                         }
1229                         if (ex_or_batch || batch || level2 || no_oplock) {
1230                                 DEBUG(0, ("Bad batch oplock entry %u.",
1231                                           (unsigned)i));
1232                                 return false;
1233                         }
1234                         batch = true;
1235                 }
1236
1237                 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1238                         if (share_mode_stale_pid(d, i)) {
1239                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1240                                 continue;
1241                         }
1242                         /* Exclusive or batch - can only be one. */
1243                         if (ex_or_batch || level2 || no_oplock) {
1244                                 DEBUG(0, ("Bad exclusive or batch oplock "
1245                                           "entry %u.", (unsigned)i));
1246                                 return false;
1247                         }
1248                         ex_or_batch = true;
1249                 }
1250
1251                 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1252                         if (batch || ex_or_batch) {
1253                                 if (share_mode_stale_pid(d, i)) {
1254                                         DEBUG(10, ("Found stale LevelII "
1255                                                    "oplock\n"));
1256                                         continue;
1257                                 }
1258                                 DEBUG(0, ("Bad levelII oplock entry %u.",
1259                                           (unsigned)i));
1260                                 return false;
1261                         }
1262                         level2 = true;
1263                 }
1264
1265                 if (e->op_type == NO_OPLOCK) {
1266                         if (batch || ex_or_batch) {
1267                                 if (share_mode_stale_pid(d, i)) {
1268                                         DEBUG(10, ("Found stale NO_OPLOCK "
1269                                                    "entry\n"));
1270                                         continue;
1271                                 }
1272                                 DEBUG(0, ("Bad no oplock entry %u.",
1273                                           (unsigned)i));
1274                                 return false;
1275                         }
1276                         no_oplock = true;
1277                 }
1278         }
1279
1280         remove_stale_share_mode_entries(d);
1281
1282         if ((batch || ex_or_batch) && (num_non_stat_opens != 1)) {
1283                 DEBUG(1, ("got batch (%d) or ex (%d) non-exclusively (%d)\n",
1284                           (int)batch, (int)ex_or_batch,
1285                           (int)d->num_share_modes));
1286                 return false;
1287         }
1288
1289         return true;
1290 }
1291
1292 static bool delay_for_oplock(files_struct *fsp,
1293                              uint64_t mid,
1294                              int oplock_request,
1295                              struct share_mode_lock *lck,
1296                              bool have_sharing_violation)
1297 {
1298         struct share_mode_data *d = lck->data;
1299         struct share_mode_entry *entry;
1300         uint32_t num_non_stat_opens = 0;
1301         uint32_t i;
1302
1303         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1304                 return false;
1305         }
1306         for (i=0; i<d->num_share_modes; i++) {
1307                 struct share_mode_entry *e = &d->share_modes[i];
1308                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1309                         continue;
1310                 }
1311                 num_non_stat_opens += 1;
1312
1313                 /*
1314                  * We found the a non-stat open, which in the exclusive/batch
1315                  * case will be inspected further down.
1316                  */
1317                 entry = e;
1318         }
1319         if (num_non_stat_opens == 0) {
1320                 /*
1321                  * Nothing to wait for around
1322                  */
1323                 return false;
1324         }
1325         if (num_non_stat_opens != 1) {
1326                 /*
1327                  * More than one open around. There can't be any exclusive or
1328                  * batch left, this is all level2.
1329                  */
1330                 return false;
1331         }
1332
1333         if (server_id_is_disconnected(&entry->pid)) {
1334                 /*
1335                  * TODO: clean up.
1336                  * This could be achieved by sending a break message
1337                  * to ourselves. Special considerations for files
1338                  * with delete_on_close flag set!
1339                  *
1340                  * For now we keep it simple and do not
1341                  * allow delete on close for durable handles.
1342                  */
1343                 return false;
1344         }
1345
1346         if (have_sharing_violation && (entry->op_type & BATCH_OPLOCK)) {
1347                 if (share_mode_stale_pid(d, 0)) {
1348                         return false;
1349                 }
1350                 send_break_message(fsp->conn->sconn->msg_ctx, entry);
1351                 return true;
1352         }
1353         if (have_sharing_violation) {
1354                 /*
1355                  * Non-batch exclusive is not broken if we have a sharing
1356                  * violation
1357                  */
1358                 return false;
1359         }
1360         if (!EXCLUSIVE_OPLOCK_TYPE(entry->op_type)) {
1361                 /*
1362                  * No break for NO_OPLOCK or LEVEL2_OPLOCK oplocks
1363                  */
1364                 return false;
1365         }
1366         if (share_mode_stale_pid(d, 0)) {
1367                 return false;
1368         }
1369
1370         send_break_message(fsp->conn->sconn->msg_ctx, entry);
1371         return true;
1372 }
1373
1374 static bool file_has_brlocks(files_struct *fsp)
1375 {
1376         struct byte_range_lock *br_lck;
1377
1378         br_lck = brl_get_locks_readonly(fsp);
1379         if (!br_lck)
1380                 return false;
1381
1382         return (brl_num_locks(br_lck) > 0);
1383 }
1384
1385 static void grant_fsp_oplock_type(files_struct *fsp,
1386                                   struct share_mode_lock *lck,
1387                                   int oplock_request)
1388 {
1389         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1390                             lp_level2_oplocks(SNUM(fsp->conn));
1391         bool got_level2_oplock, got_a_none_oplock;
1392         uint32_t i;
1393
1394         /* Start by granting what the client asked for,
1395            but ensure no SAMBA_PRIVATE bits can be set. */
1396         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1397
1398         if (oplock_request & INTERNAL_OPEN_ONLY) {
1399                 /* No oplocks on internal open. */
1400                 fsp->oplock_type = NO_OPLOCK;
1401                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1402                         fsp->oplock_type, fsp_str_dbg(fsp)));
1403                 return;
1404         }
1405
1406         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1407                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1408                         fsp_str_dbg(fsp)));
1409                 fsp->oplock_type = NO_OPLOCK;
1410         }
1411
1412         if (is_stat_open(fsp->access_mask)) {
1413                 /* Leave the value already set. */
1414                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1415                         fsp->oplock_type, fsp_str_dbg(fsp)));
1416                 return;
1417         }
1418
1419         got_level2_oplock = false;
1420         got_a_none_oplock = false;
1421
1422         for (i=0; i<lck->data->num_share_modes; i++) {
1423                 int op_type = lck->data->share_modes[i].op_type;
1424
1425                 if (LEVEL_II_OPLOCK_TYPE(op_type)) {
1426                         got_level2_oplock = true;
1427                 }
1428                 if (op_type == NO_OPLOCK) {
1429                         got_a_none_oplock = true;
1430                 }
1431         }
1432
1433         /*
1434          * Match what was requested (fsp->oplock_type) with
1435          * what was found in the existing share modes.
1436          */
1437
1438         if (got_level2_oplock || got_a_none_oplock) {
1439                 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
1440                         fsp->oplock_type = LEVEL_II_OPLOCK;
1441                 }
1442         }
1443
1444         /*
1445          * Don't grant level2 to clients that don't want them
1446          * or if we've turned them off.
1447          */
1448         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1449                 fsp->oplock_type = NO_OPLOCK;
1450         }
1451
1452         if (fsp->oplock_type == LEVEL_II_OPLOCK && !got_level2_oplock) {
1453                 /*
1454                  * We're the first level2 oplock. Indicate that in brlock.tdb.
1455                  */
1456                 struct byte_range_lock *brl;
1457
1458                 brl = brl_get_locks(talloc_tos(), fsp);
1459                 if (brl != NULL) {
1460                         brl_set_have_read_oplocks(brl, true);
1461                         TALLOC_FREE(brl);
1462                 }
1463         }
1464
1465         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1466                   fsp->oplock_type, fsp_str_dbg(fsp)));
1467 }
1468
1469 static bool request_timed_out(struct timeval request_time,
1470                               struct timeval timeout)
1471 {
1472         struct timeval now, end_time;
1473         GetTimeOfDay(&now);
1474         end_time = timeval_sum(&request_time, &timeout);
1475         return (timeval_compare(&end_time, &now) < 0);
1476 }
1477
1478 struct defer_open_state {
1479         struct smbd_server_connection *sconn;
1480         uint64_t mid;
1481 };
1482
1483 static void defer_open_done(struct tevent_req *req);
1484
1485 /****************************************************************************
1486  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1487 ****************************************************************************/
1488
1489 static void defer_open(struct share_mode_lock *lck,
1490                        struct timeval request_time,
1491                        struct timeval timeout,
1492                        struct smb_request *req,
1493                        struct deferred_open_record *state)
1494 {
1495         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1496                   "open entry for mid %llu\n",
1497                   (unsigned int)request_time.tv_sec,
1498                   (unsigned int)request_time.tv_usec,
1499                   (unsigned long long)req->mid));
1500
1501         if (!push_deferred_open_message_smb(req, request_time, timeout,
1502                                        state->id, (char *)state, sizeof(*state))) {
1503                 TALLOC_FREE(lck);
1504                 exit_server("push_deferred_open_message_smb failed");
1505         }
1506         if (lck) {
1507                 struct defer_open_state *watch_state;
1508                 struct tevent_req *watch_req;
1509                 bool ret;
1510
1511                 watch_state = talloc(req->sconn, struct defer_open_state);
1512                 if (watch_state == NULL) {
1513                         exit_server("talloc failed");
1514                 }
1515                 watch_state->sconn = req->sconn;
1516                 watch_state->mid = req->mid;
1517
1518                 DEBUG(10, ("defering mid %llu\n",
1519                            (unsigned long long)req->mid));
1520
1521                 watch_req = dbwrap_record_watch_send(
1522                         watch_state, req->sconn->ev_ctx, lck->data->record,
1523                         req->sconn->msg_ctx);
1524                 if (watch_req == NULL) {
1525                         exit_server("Could not watch share mode record");
1526                 }
1527                 tevent_req_set_callback(watch_req, defer_open_done,
1528                                         watch_state);
1529
1530                 ret = tevent_req_set_endtime(
1531                         watch_req, req->sconn->ev_ctx,
1532                         timeval_sum(&request_time, &timeout));
1533                 SMB_ASSERT(ret);
1534         }
1535 }
1536
1537 static void defer_open_done(struct tevent_req *req)
1538 {
1539         struct defer_open_state *state = tevent_req_callback_data(
1540                 req, struct defer_open_state);
1541         NTSTATUS status;
1542         bool ret;
1543
1544         status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1545         TALLOC_FREE(req);
1546         if (!NT_STATUS_IS_OK(status)) {
1547                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1548                           nt_errstr(status)));
1549                 /*
1550                  * Even if it failed, retry anyway. TODO: We need a way to
1551                  * tell a re-scheduled open about that error.
1552                  */
1553         }
1554
1555         DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1556
1557         ret = schedule_deferred_open_message_smb(state->sconn, state->mid);
1558         SMB_ASSERT(ret);
1559         TALLOC_FREE(state);
1560 }
1561
1562
1563 /****************************************************************************
1564  On overwrite open ensure that the attributes match.
1565 ****************************************************************************/
1566
1567 static bool open_match_attributes(connection_struct *conn,
1568                                   uint32 old_dos_attr,
1569                                   uint32 new_dos_attr,
1570                                   mode_t existing_unx_mode,
1571                                   mode_t new_unx_mode,
1572                                   mode_t *returned_unx_mode)
1573 {
1574         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1575
1576         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1577         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1578
1579         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1580            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1581                 *returned_unx_mode = new_unx_mode;
1582         } else {
1583                 *returned_unx_mode = (mode_t)0;
1584         }
1585
1586         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1587                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1588                   "returned_unx_mode = 0%o\n",
1589                   (unsigned int)old_dos_attr,
1590                   (unsigned int)existing_unx_mode,
1591                   (unsigned int)new_dos_attr,
1592                   (unsigned int)*returned_unx_mode ));
1593
1594         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1595         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1596                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1597                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1598                         return False;
1599                 }
1600         }
1601         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1602                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1603                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1604                         return False;
1605                 }
1606         }
1607         return True;
1608 }
1609
1610 /****************************************************************************
1611  Special FCB or DOS processing in the case of a sharing violation.
1612  Try and find a duplicated file handle.
1613 ****************************************************************************/
1614
1615 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1616                                 connection_struct *conn,
1617                                 files_struct *fsp_to_dup_into,
1618                                 const struct smb_filename *smb_fname,
1619                                 struct file_id id,
1620                                 uint16 file_pid,
1621                                 uint64_t vuid,
1622                                 uint32 access_mask,
1623                                 uint32 share_access,
1624                                 uint32 create_options)
1625 {
1626         files_struct *fsp;
1627
1628         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1629                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1630
1631         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1632             fsp = file_find_di_next(fsp)) {
1633
1634                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1635                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1636                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1637                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1638                           (unsigned int)fsp->file_pid,
1639                           (unsigned int)fsp->fh->private_options,
1640                           (unsigned int)fsp->access_mask ));
1641
1642                 if (fsp != fsp_to_dup_into &&
1643                     fsp->fh->fd != -1 &&
1644                     fsp->vuid == vuid &&
1645                     fsp->file_pid == file_pid &&
1646                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1647                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1648                     (fsp->access_mask & FILE_WRITE_DATA) &&
1649                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1650                     strequal(fsp->fsp_name->stream_name,
1651                              smb_fname->stream_name)) {
1652                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1653                         break;
1654                 }
1655         }
1656
1657         if (!fsp) {
1658                 return NT_STATUS_NOT_FOUND;
1659         }
1660
1661         /* quite an insane set of semantics ... */
1662         if (is_executable(smb_fname->base_name) &&
1663             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1664                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1665                 return NT_STATUS_INVALID_PARAMETER;
1666         }
1667
1668         /* We need to duplicate this fsp. */
1669         return dup_file_fsp(req, fsp, access_mask, share_access,
1670                             create_options, fsp_to_dup_into);
1671 }
1672
1673 static void schedule_defer_open(struct share_mode_lock *lck,
1674                                 struct timeval request_time,
1675                                 struct smb_request *req)
1676 {
1677         struct deferred_open_record state;
1678
1679         /* This is a relative time, added to the absolute
1680            request_time value to get the absolute timeout time.
1681            Note that if this is the second or greater time we enter
1682            this codepath for this particular request mid then
1683            request_time is left as the absolute time of the *first*
1684            time this request mid was processed. This is what allows
1685            the request to eventually time out. */
1686
1687         struct timeval timeout;
1688
1689         /* Normally the smbd we asked should respond within
1690          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1691          * the client did, give twice the timeout as a safety
1692          * measure here in case the other smbd is stuck
1693          * somewhere else. */
1694
1695         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1696
1697         /* Nothing actually uses state.delayed_for_oplocks
1698            but it's handy to differentiate in debug messages
1699            between a 30 second delay due to oplock break, and
1700            a 1 second delay for share mode conflicts. */
1701
1702         state.delayed_for_oplocks = True;
1703         state.async_open = false;
1704         state.id = lck->data->id;
1705
1706         if (!request_timed_out(request_time, timeout)) {
1707                 defer_open(lck, request_time, timeout, req, &state);
1708         }
1709 }
1710
1711 /****************************************************************************
1712  Reschedule an open call that went asynchronous.
1713 ****************************************************************************/
1714
1715 static void schedule_async_open(struct timeval request_time,
1716                                 struct smb_request *req)
1717 {
1718         struct deferred_open_record state;
1719         struct timeval timeout;
1720
1721         timeout = timeval_set(20, 0);
1722
1723         ZERO_STRUCT(state);
1724         state.delayed_for_oplocks = false;
1725         state.async_open = true;
1726
1727         if (!request_timed_out(request_time, timeout)) {
1728                 defer_open(NULL, request_time, timeout, req, &state);
1729         }
1730 }
1731
1732 /****************************************************************************
1733  Work out what access_mask to use from what the client sent us.
1734 ****************************************************************************/
1735
1736 static NTSTATUS smbd_calculate_maximum_allowed_access(
1737         connection_struct *conn,
1738         const struct smb_filename *smb_fname,
1739         bool use_privs,
1740         uint32_t *p_access_mask)
1741 {
1742         struct security_descriptor *sd;
1743         uint32_t access_granted;
1744         NTSTATUS status;
1745
1746         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1747                 *p_access_mask |= FILE_GENERIC_ALL;
1748                 return NT_STATUS_OK;
1749         }
1750
1751         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1752                                     (SECINFO_OWNER |
1753                                      SECINFO_GROUP |
1754                                      SECINFO_DACL),
1755                                     talloc_tos(), &sd);
1756
1757         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1758                 /*
1759                  * File did not exist
1760                  */
1761                 *p_access_mask = FILE_GENERIC_ALL;
1762                 return NT_STATUS_OK;
1763         }
1764         if (!NT_STATUS_IS_OK(status)) {
1765                 DEBUG(10,("Could not get acl on file %s: %s\n",
1766                           smb_fname_str_dbg(smb_fname),
1767                           nt_errstr(status)));
1768                 return NT_STATUS_ACCESS_DENIED;
1769         }
1770
1771         /*
1772          * If we can access the path to this file, by
1773          * default we have FILE_READ_ATTRIBUTES from the
1774          * containing directory. See the section:
1775          * "Algorithm to Check Access to an Existing File"
1776          * in MS-FSA.pdf.
1777          *
1778          * se_file_access_check()
1779          * also takes care of owner WRITE_DAC and READ_CONTROL.
1780          */
1781         status = se_file_access_check(sd,
1782                                  get_current_nttok(conn),
1783                                  use_privs,
1784                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1785                                  &access_granted);
1786
1787         TALLOC_FREE(sd);
1788
1789         if (!NT_STATUS_IS_OK(status)) {
1790                 DEBUG(10, ("Access denied on file %s: "
1791                            "when calculating maximum access\n",
1792                            smb_fname_str_dbg(smb_fname)));
1793                 return NT_STATUS_ACCESS_DENIED;
1794         }
1795         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1796
1797         if (!(access_granted & DELETE_ACCESS)) {
1798                 if (can_delete_file_in_directory(conn, smb_fname)) {
1799                         *p_access_mask |= DELETE_ACCESS;
1800                 }
1801         }
1802
1803         return NT_STATUS_OK;
1804 }
1805
1806 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1807                                     const struct smb_filename *smb_fname,
1808                                     bool use_privs,
1809                                     uint32_t access_mask,
1810                                     uint32_t *access_mask_out)
1811 {
1812         NTSTATUS status;
1813         uint32_t orig_access_mask = access_mask;
1814         uint32_t rejected_share_access;
1815
1816         /*
1817          * Convert GENERIC bits to specific bits.
1818          */
1819
1820         se_map_generic(&access_mask, &file_generic_mapping);
1821
1822         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1823         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1824
1825                 status = smbd_calculate_maximum_allowed_access(
1826                         conn, smb_fname, use_privs, &access_mask);
1827
1828                 if (!NT_STATUS_IS_OK(status)) {
1829                         return status;
1830                 }
1831
1832                 access_mask &= conn->share_access;
1833         }
1834
1835         rejected_share_access = access_mask & ~(conn->share_access);
1836
1837         if (rejected_share_access) {
1838                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1839                         "file %s: rejected by share access mask[0x%08X] "
1840                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1841                         smb_fname_str_dbg(smb_fname),
1842                         conn->share_access,
1843                         orig_access_mask, access_mask,
1844                         rejected_share_access));
1845                 return NT_STATUS_ACCESS_DENIED;
1846         }
1847
1848         *access_mask_out = access_mask;
1849         return NT_STATUS_OK;
1850 }
1851
1852 /****************************************************************************
1853  Remove the deferred open entry under lock.
1854 ****************************************************************************/
1855
1856 /****************************************************************************
1857  Return true if this is a state pointer to an asynchronous create.
1858 ****************************************************************************/
1859
1860 bool is_deferred_open_async(const void *ptr)
1861 {
1862         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1863
1864         return state->async_open;
1865 }
1866
1867 static bool clear_ads(uint32_t create_disposition)
1868 {
1869         bool ret = false;
1870
1871         switch (create_disposition) {
1872         case FILE_SUPERSEDE:
1873         case FILE_OVERWRITE_IF:
1874         case FILE_OVERWRITE:
1875                 ret = true;
1876                 break;
1877         default:
1878                 break;
1879         }
1880         return ret;
1881 }
1882
1883 static int disposition_to_open_flags(uint32_t create_disposition)
1884 {
1885         int ret = 0;
1886
1887         /*
1888          * Currently we're using FILE_SUPERSEDE as the same as
1889          * FILE_OVERWRITE_IF but they really are
1890          * different. FILE_SUPERSEDE deletes an existing file
1891          * (requiring delete access) then recreates it.
1892          */
1893
1894         switch (create_disposition) {
1895         case FILE_SUPERSEDE:
1896         case FILE_OVERWRITE_IF:
1897                 /*
1898                  * If file exists replace/overwrite. If file doesn't
1899                  * exist create.
1900                  */
1901                 ret = O_CREAT|O_TRUNC;
1902                 break;
1903
1904         case FILE_OPEN:
1905                 /*
1906                  * If file exists open. If file doesn't exist error.
1907                  */
1908                 ret = 0;
1909                 break;
1910
1911         case FILE_OVERWRITE:
1912                 /*
1913                  * If file exists overwrite. If file doesn't exist
1914                  * error.
1915                  */
1916                 ret = O_TRUNC;
1917                 break;
1918
1919         case FILE_CREATE:
1920                 /*
1921                  * If file exists error. If file doesn't exist create.
1922                  */
1923                 ret = O_CREAT|O_EXCL;
1924                 break;
1925
1926         case FILE_OPEN_IF:
1927                 /*
1928                  * If file exists open. If file doesn't exist create.
1929                  */
1930                 ret = O_CREAT;
1931                 break;
1932         }
1933         return ret;
1934 }
1935
1936 static int calculate_open_access_flags(uint32_t access_mask,
1937                                        int oplock_request,
1938                                        uint32_t private_flags)
1939 {
1940         bool need_write, need_read;
1941
1942         /*
1943          * Note that we ignore the append flag as append does not
1944          * mean the same thing under DOS and Unix.
1945          */
1946
1947         need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
1948         if (!need_write) {
1949                 return O_RDONLY;
1950         }
1951
1952         /* DENY_DOS opens are always underlying read-write on the
1953            file handle, no matter what the requested access mask
1954            says. */
1955
1956         need_read =
1957                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1958                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1959                                 FILE_READ_EA|FILE_EXECUTE));
1960
1961         if (!need_read) {
1962                 return O_WRONLY;
1963         }
1964         return O_RDWR;
1965 }
1966
1967 /****************************************************************************
1968  Open a file with a share mode. Passed in an already created files_struct *.
1969 ****************************************************************************/
1970
1971 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1972                             struct smb_request *req,
1973                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1974                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1975                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1976                             uint32 create_options,      /* options such as delete on close. */
1977                             uint32 new_dos_attributes,  /* attributes used for new file. */
1978                             int oplock_request,         /* internal Samba oplock codes. */
1979                                                         /* Information (FILE_EXISTS etc.) */
1980                             uint32_t private_flags,     /* Samba specific flags. */
1981                             int *pinfo,
1982                             files_struct *fsp)
1983 {
1984         struct smb_filename *smb_fname = fsp->fsp_name;
1985         int flags=0;
1986         int flags2=0;
1987         bool file_existed = VALID_STAT(smb_fname->st);
1988         bool def_acl = False;
1989         bool posix_open = False;
1990         bool new_file_created = False;
1991         bool first_open_attempt = true;
1992         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1993         mode_t new_unx_mode = (mode_t)0;
1994         mode_t unx_mode = (mode_t)0;
1995         int info;
1996         uint32 existing_dos_attributes = 0;
1997         struct timeval request_time = timeval_zero();
1998         struct share_mode_lock *lck = NULL;
1999         uint32 open_access_mask = access_mask;
2000         NTSTATUS status;
2001         char *parent_dir;
2002         SMB_STRUCT_STAT saved_stat = smb_fname->st;
2003         struct timespec old_write_time;
2004         struct file_id id;
2005
2006         if (conn->printer) {
2007                 /*
2008                  * Printers are handled completely differently.
2009                  * Most of the passed parameters are ignored.
2010                  */
2011
2012                 if (pinfo) {
2013                         *pinfo = FILE_WAS_CREATED;
2014                 }
2015
2016                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
2017                            smb_fname_str_dbg(smb_fname)));
2018
2019                 if (!req) {
2020                         DEBUG(0,("open_file_ntcreate: printer open without "
2021                                 "an SMB request!\n"));
2022                         return NT_STATUS_INTERNAL_ERROR;
2023                 }
2024
2025                 return print_spool_open(fsp, smb_fname->base_name,
2026                                         req->vuid);
2027         }
2028
2029         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2030                             NULL)) {
2031                 return NT_STATUS_NO_MEMORY;
2032         }
2033
2034         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2035                 posix_open = True;
2036                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2037                 new_dos_attributes = 0;
2038         } else {
2039                 /* Windows allows a new file to be created and
2040                    silently removes a FILE_ATTRIBUTE_DIRECTORY
2041                    sent by the client. Do the same. */
2042
2043                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2044
2045                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2046                  * created new. */
2047                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2048                                      smb_fname, parent_dir);
2049         }
2050
2051         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2052                    "access_mask=0x%x share_access=0x%x "
2053                    "create_disposition = 0x%x create_options=0x%x "
2054                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2055                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2056                    access_mask, share_access, create_disposition,
2057                    create_options, (unsigned int)unx_mode, oplock_request,
2058                    (unsigned int)private_flags));
2059
2060         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2061                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2062                 return NT_STATUS_INTERNAL_ERROR;
2063         }
2064
2065         /*
2066          * Only non-internal opens can be deferred at all
2067          */
2068
2069         if (req) {
2070                 void *ptr;
2071                 if (get_deferred_open_message_state(req,
2072                                 &request_time,
2073                                 &ptr)) {
2074                         /* Remember the absolute time of the original
2075                            request with this mid. We'll use it later to
2076                            see if this has timed out. */
2077
2078                         /* If it was an async create retry, the file
2079                            didn't exist. */
2080
2081                         if (is_deferred_open_async(ptr)) {
2082                                 SET_STAT_INVALID(smb_fname->st);
2083                                 file_existed = false;
2084                         }
2085
2086                         /* Ensure we don't reprocess this message. */
2087                         remove_deferred_open_message_smb(req->sconn, req->mid);
2088
2089                         first_open_attempt = false;
2090                 }
2091         }
2092
2093         if (!posix_open) {
2094                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2095                 if (file_existed) {
2096                         existing_dos_attributes = dos_mode(conn, smb_fname);
2097                 }
2098         }
2099
2100         /* ignore any oplock requests if oplocks are disabled */
2101         if (!lp_oplocks(SNUM(conn)) ||
2102             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2103                 /* Mask off everything except the private Samba bits. */
2104                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2105         }
2106
2107         /* this is for OS/2 long file names - say we don't support them */
2108         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2109                 /* OS/2 Workplace shell fix may be main code stream in a later
2110                  * release. */
2111                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2112                          "supported.\n"));
2113                 if (use_nt_status()) {
2114                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2115                 }
2116                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2117         }
2118
2119         switch( create_disposition ) {
2120                 case FILE_OPEN:
2121                         /* If file exists open. If file doesn't exist error. */
2122                         if (!file_existed) {
2123                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2124                                          "requested for file %s and file "
2125                                          "doesn't exist.\n",
2126                                          smb_fname_str_dbg(smb_fname)));
2127                                 errno = ENOENT;
2128                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2129                         }
2130                         break;
2131
2132                 case FILE_OVERWRITE:
2133                         /* If file exists overwrite. If file doesn't exist
2134                          * error. */
2135                         if (!file_existed) {
2136                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2137                                          "requested for file %s and file "
2138                                          "doesn't exist.\n",
2139                                          smb_fname_str_dbg(smb_fname) ));
2140                                 errno = ENOENT;
2141                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2142                         }
2143                         break;
2144
2145                 case FILE_CREATE:
2146                         /* If file exists error. If file doesn't exist
2147                          * create. */
2148                         if (file_existed) {
2149                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2150                                          "requested for file %s and file "
2151                                          "already exists.\n",
2152                                          smb_fname_str_dbg(smb_fname)));
2153                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2154                                         errno = EISDIR;
2155                                 } else {
2156                                         errno = EEXIST;
2157                                 }
2158                                 return map_nt_error_from_unix(errno);
2159                         }
2160                         break;
2161
2162                 case FILE_SUPERSEDE:
2163                 case FILE_OVERWRITE_IF:
2164                 case FILE_OPEN_IF:
2165                         break;
2166                 default:
2167                         return NT_STATUS_INVALID_PARAMETER;
2168         }
2169
2170         flags2 = disposition_to_open_flags(create_disposition);
2171
2172         /* We only care about matching attributes on file exists and
2173          * overwrite. */
2174
2175         if (!posix_open && file_existed &&
2176             ((create_disposition == FILE_OVERWRITE) ||
2177              (create_disposition == FILE_OVERWRITE_IF))) {
2178                 if (!open_match_attributes(conn, existing_dos_attributes,
2179                                            new_dos_attributes,
2180                                            smb_fname->st.st_ex_mode,
2181                                            unx_mode, &new_unx_mode)) {
2182                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2183                                  "for file %s (%x %x) (0%o, 0%o)\n",
2184                                  smb_fname_str_dbg(smb_fname),
2185                                  existing_dos_attributes,
2186                                  new_dos_attributes,
2187                                  (unsigned int)smb_fname->st.st_ex_mode,
2188                                  (unsigned int)unx_mode ));
2189                         errno = EACCES;
2190                         return NT_STATUS_ACCESS_DENIED;
2191                 }
2192         }
2193
2194         status = smbd_calculate_access_mask(conn, smb_fname,
2195                                         false,
2196                                         access_mask,
2197                                         &access_mask);
2198         if (!NT_STATUS_IS_OK(status)) {
2199                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2200                         "on file %s returned %s\n",
2201                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2202                 return status;
2203         }
2204
2205         open_access_mask = access_mask;
2206
2207         if (flags2 & O_TRUNC) {
2208                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2209         }
2210
2211         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2212                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2213                     access_mask));
2214
2215         /*
2216          * Note that we ignore the append flag as append does not
2217          * mean the same thing under DOS and Unix.
2218          */
2219
2220         flags = calculate_open_access_flags(access_mask, oplock_request,
2221                                             private_flags);
2222
2223         /*
2224          * Currently we only look at FILE_WRITE_THROUGH for create options.
2225          */
2226
2227 #if defined(O_SYNC)
2228         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2229                 flags2 |= O_SYNC;
2230         }
2231 #endif /* O_SYNC */
2232
2233         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2234                 flags2 |= O_APPEND;
2235         }
2236
2237         if (!posix_open && !CAN_WRITE(conn)) {
2238                 /*
2239                  * We should really return a permission denied error if either
2240                  * O_CREAT or O_TRUNC are set, but for compatibility with
2241                  * older versions of Samba we just AND them out.
2242                  */
2243                 flags2 &= ~(O_CREAT|O_TRUNC);
2244         }
2245
2246         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2247                 /*
2248                  * With kernel oplocks the open breaking an oplock
2249                  * blocks until the oplock holder has given up the
2250                  * oplock or closed the file. We prevent this by first
2251                  * trying to open the file with O_NONBLOCK (see "man
2252                  * fcntl" on Linux). For the second try, triggered by
2253                  * an oplock break response, we do not need this
2254                  * anymore.
2255                  *
2256                  * This is true under the assumption that only Samba
2257                  * requests kernel oplocks. Once someone else like
2258                  * NFSv4 starts to use that API, we will have to
2259                  * modify this by communicating with the NFSv4 server.
2260                  */
2261                 flags2 |= O_NONBLOCK;
2262         }
2263
2264         /*
2265          * Ensure we can't write on a read-only share or file.
2266          */
2267
2268         if (flags != O_RDONLY && file_existed &&
2269             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2270                 DEBUG(5,("open_file_ntcreate: write access requested for "
2271                          "file %s on read only %s\n",
2272                          smb_fname_str_dbg(smb_fname),
2273                          !CAN_WRITE(conn) ? "share" : "file" ));
2274                 errno = EACCES;
2275                 return NT_STATUS_ACCESS_DENIED;
2276         }
2277
2278         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2279         fsp->share_access = share_access;
2280         fsp->fh->private_options = private_flags;
2281         fsp->access_mask = open_access_mask; /* We change this to the
2282                                               * requested access_mask after
2283                                               * the open is done. */
2284         fsp->posix_open = posix_open;
2285
2286         /* Ensure no SAMBA_PRIVATE bits can be set. */
2287         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2288
2289         if (timeval_is_zero(&request_time)) {
2290                 request_time = fsp->open_time;
2291         }
2292
2293         /*
2294          * Ensure we pay attention to default ACLs on directories if required.
2295          */
2296
2297         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2298             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2299                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2300         }
2301
2302         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2303                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2304                  (unsigned int)flags, (unsigned int)flags2,
2305                  (unsigned int)unx_mode, (unsigned int)access_mask,
2306                  (unsigned int)open_access_mask));
2307
2308         fsp_open = open_file(fsp, conn, req, parent_dir,
2309                              flags|flags2, unx_mode, access_mask,
2310                              open_access_mask, &new_file_created);
2311
2312         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2313                 struct deferred_open_record state;
2314
2315                 /*
2316                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2317                  */
2318                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2319                         DEBUG(10, ("FIFO busy\n"));
2320                         return NT_STATUS_NETWORK_BUSY;
2321                 }
2322                 if (req == NULL) {
2323                         DEBUG(10, ("Internal open busy\n"));
2324                         return NT_STATUS_NETWORK_BUSY;
2325                 }
2326
2327                 /*
2328                  * From here on we assume this is an oplock break triggered
2329                  */
2330
2331                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2332                 if (lck == NULL) {
2333                         state.delayed_for_oplocks = false;
2334                         state.async_open = false;
2335                         state.id = fsp->file_id;
2336                         defer_open(NULL, request_time, timeval_set(0, 0),
2337                                    req, &state);
2338                         DEBUG(10, ("No share mode lock found after "
2339                                    "EWOULDBLOCK, retrying sync\n"));
2340                         return NT_STATUS_SHARING_VIOLATION;
2341                 }
2342
2343                 if (!validate_oplock_types(lck)) {
2344                         smb_panic("validate_oplock_types failed");
2345                 }
2346
2347                 if (delay_for_oplock(fsp, req->mid, 0, lck, false)) {
2348                         schedule_defer_open(lck, request_time, req);
2349                         TALLOC_FREE(lck);
2350                         DEBUG(10, ("Sent oplock break request to kernel "
2351                                    "oplock holder\n"));
2352                         return NT_STATUS_SHARING_VIOLATION;
2353                 }
2354
2355                 /*
2356                  * No oplock from Samba around. Immediately retry with
2357                  * a blocking open.
2358                  */
2359                 state.delayed_for_oplocks = false;
2360                 state.async_open = false;
2361                 state.id = lck->data->id;
2362                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2363                 TALLOC_FREE(lck);
2364                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2365                            "Retrying sync\n"));
2366                 return NT_STATUS_SHARING_VIOLATION;
2367         }
2368
2369         if (!NT_STATUS_IS_OK(fsp_open)) {
2370                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2371                         schedule_async_open(request_time, req);
2372                 }
2373                 return fsp_open;
2374         }
2375
2376         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2377                 /*
2378                  * The file did exist, but some other (local or NFS)
2379                  * process either renamed/unlinked and re-created the
2380                  * file with different dev/ino after we walked the path,
2381                  * but before we did the open. We could retry the
2382                  * open but it's a rare enough case it's easier to
2383                  * just fail the open to prevent creating any problems
2384                  * in the open file db having the wrong dev/ino key.
2385                  */
2386                 fd_close(fsp);
2387                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2388                         "Old (dev=0x%llu, ino =0x%llu). "
2389                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2390                         " with NT_STATUS_ACCESS_DENIED.\n",
2391                          smb_fname_str_dbg(smb_fname),
2392                          (unsigned long long)saved_stat.st_ex_dev,
2393                          (unsigned long long)saved_stat.st_ex_ino,
2394                          (unsigned long long)smb_fname->st.st_ex_dev,
2395                          (unsigned long long)smb_fname->st.st_ex_ino));
2396                 return NT_STATUS_ACCESS_DENIED;
2397         }
2398
2399         old_write_time = smb_fname->st.st_ex_mtime;
2400
2401         /*
2402          * Deal with the race condition where two smbd's detect the
2403          * file doesn't exist and do the create at the same time. One
2404          * of them will win and set a share mode, the other (ie. this
2405          * one) should check if the requested share mode for this
2406          * create is allowed.
2407          */
2408
2409         /*
2410          * Now the file exists and fsp is successfully opened,
2411          * fsp->dev and fsp->inode are valid and should replace the
2412          * dev=0,inode=0 from a non existent file. Spotted by
2413          * Nadav Danieli <nadavd@exanet.com>. JRA.
2414          */
2415
2416         id = fsp->file_id;
2417
2418         lck = get_share_mode_lock(talloc_tos(), id,
2419                                   conn->connectpath,
2420                                   smb_fname, &old_write_time);
2421
2422         if (lck == NULL) {
2423                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2424                           "mode lock for %s\n",
2425                           smb_fname_str_dbg(smb_fname)));
2426                 fd_close(fsp);
2427                 return NT_STATUS_SHARING_VIOLATION;
2428         }
2429
2430         /* Get the types we need to examine. */
2431         if (!validate_oplock_types(lck)) {
2432                 smb_panic("validate_oplock_types failed");
2433         }
2434
2435         if (has_delete_on_close(lck, fsp->name_hash)) {
2436                 TALLOC_FREE(lck);
2437                 fd_close(fsp);
2438                 return NT_STATUS_DELETE_PENDING;
2439         }
2440
2441         status = open_mode_check(conn, lck,
2442                                  access_mask, share_access);
2443
2444         if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
2445             (lck->data->num_share_modes > 0)) {
2446                 /*
2447                  * This comes from ancient times out of open_mode_check. I
2448                  * have no clue whether this is still necessary. I can't think
2449                  * of a case where this would actually matter further down in
2450                  * this function. I leave it here for further investigation
2451                  * :-)
2452                  */
2453                 file_existed = true;
2454         }
2455
2456         if ((req != NULL) &&
2457             delay_for_oplock(
2458                     fsp, req->mid, oplock_request, lck,
2459                     NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION))) {
2460                 schedule_defer_open(lck, request_time, req);
2461                 TALLOC_FREE(lck);
2462                 fd_close(fsp);
2463                 return NT_STATUS_SHARING_VIOLATION;
2464         }
2465
2466         if (!NT_STATUS_IS_OK(status)) {
2467                 uint32 can_access_mask;
2468                 bool can_access = True;
2469
2470                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2471
2472                 /* Check if this can be done with the deny_dos and fcb
2473                  * calls. */
2474                 if (private_flags &
2475                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2476                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2477                         if (req == NULL) {
2478                                 DEBUG(0, ("DOS open without an SMB "
2479                                           "request!\n"));
2480                                 TALLOC_FREE(lck);
2481                                 fd_close(fsp);
2482                                 return NT_STATUS_INTERNAL_ERROR;
2483                         }
2484
2485                         /* Use the client requested access mask here,
2486                          * not the one we open with. */
2487                         status = fcb_or_dos_open(req,
2488                                                  conn,
2489                                                  fsp,
2490                                                  smb_fname,
2491                                                  id,
2492                                                  req->smbpid,
2493                                                  req->vuid,
2494                                                  access_mask,
2495                                                  share_access,
2496                                                  create_options);
2497
2498                         if (NT_STATUS_IS_OK(status)) {
2499                                 TALLOC_FREE(lck);
2500                                 if (pinfo) {
2501                                         *pinfo = FILE_WAS_OPENED;
2502                                 }
2503                                 return NT_STATUS_OK;
2504                         }
2505                 }
2506
2507                 /*
2508                  * This next line is a subtlety we need for
2509                  * MS-Access. If a file open will fail due to share
2510                  * permissions and also for security (access) reasons,
2511                  * we need to return the access failed error, not the
2512                  * share error. We can't open the file due to kernel
2513                  * oplock deadlock (it's possible we failed above on
2514                  * the open_mode_check()) so use a userspace check.
2515                  */
2516
2517                 if (flags & O_RDWR) {
2518                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2519                 } else if (flags & O_WRONLY) {
2520                         can_access_mask = FILE_WRITE_DATA;
2521                 } else {
2522                         can_access_mask = FILE_READ_DATA;
2523                 }
2524
2525                 if (((can_access_mask & FILE_WRITE_DATA) &&
2526                      !CAN_WRITE(conn)) ||
2527                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2528                                                               smb_fname,
2529                                                               false,
2530                                                               can_access_mask))) {
2531                         can_access = False;
2532                 }
2533
2534                 /*
2535                  * If we're returning a share violation, ensure we
2536                  * cope with the braindead 1 second delay (SMB1 only).
2537                  */
2538
2539                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2540                     !conn->sconn->using_smb2 &&
2541                     lp_defer_sharing_violations()) {
2542                         struct timeval timeout;
2543                         struct deferred_open_record state;
2544                         int timeout_usecs;
2545
2546                         /* this is a hack to speed up torture tests
2547                            in 'make test' */
2548                         timeout_usecs = lp_parm_int(SNUM(conn),
2549                                                     "smbd","sharedelay",
2550                                                     SHARING_VIOLATION_USEC_WAIT);
2551
2552                         /* This is a relative time, added to the absolute
2553                            request_time value to get the absolute timeout time.
2554                            Note that if this is the second or greater time we enter
2555                            this codepath for this particular request mid then
2556                            request_time is left as the absolute time of the *first*
2557                            time this request mid was processed. This is what allows
2558                            the request to eventually time out. */
2559
2560                         timeout = timeval_set(0, timeout_usecs);
2561
2562                         /* Nothing actually uses state.delayed_for_oplocks
2563                            but it's handy to differentiate in debug messages
2564                            between a 30 second delay due to oplock break, and
2565                            a 1 second delay for share mode conflicts. */
2566
2567                         state.delayed_for_oplocks = False;
2568                         state.async_open = false;
2569                         state.id = id;
2570
2571                         if ((req != NULL)
2572                             && !request_timed_out(request_time,
2573                                                   timeout)) {
2574                                 defer_open(lck, request_time, timeout,
2575                                            req, &state);
2576                         }
2577                 }
2578
2579                 TALLOC_FREE(lck);
2580                 fd_close(fsp);
2581                 if (can_access) {
2582                         /*
2583                          * We have detected a sharing violation here
2584                          * so return the correct error code
2585                          */
2586                         status = NT_STATUS_SHARING_VIOLATION;
2587                 } else {
2588                         status = NT_STATUS_ACCESS_DENIED;
2589                 }
2590                 return status;
2591         }
2592
2593         grant_fsp_oplock_type(fsp, lck, oplock_request);
2594
2595         /*
2596          * We have the share entry *locked*.....
2597          */
2598
2599         /* Delete streams if create_disposition requires it */
2600         if (!new_file_created && clear_ads(create_disposition) &&
2601             !is_ntfs_stream_smb_fname(smb_fname)) {
2602                 status = delete_all_streams(conn, smb_fname->base_name);
2603                 if (!NT_STATUS_IS_OK(status)) {
2604                         TALLOC_FREE(lck);
2605                         fd_close(fsp);
2606                         return status;
2607                 }
2608         }
2609
2610         /* note that we ignore failure for the following. It is
2611            basically a hack for NFS, and NFS will never set one of
2612            these only read them. Nobody but Samba can ever set a deny
2613            mode and we have already checked our more authoritative
2614            locking database for permission to set this deny mode. If
2615            the kernel refuses the operations then the kernel is wrong.
2616            note that GPFS supports it as well - jmcd */
2617
2618         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2619                 int ret_flock;
2620                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2621                 if(ret_flock == -1 ){
2622
2623                         TALLOC_FREE(lck);
2624                         fd_close(fsp);
2625
2626                         return NT_STATUS_SHARING_VIOLATION;
2627                 }
2628         }
2629
2630         /*
2631          * At this point onwards, we can guarantee that the share entry
2632          * is locked, whether we created the file or not, and that the
2633          * deny mode is compatible with all current opens.
2634          */
2635
2636         /*
2637          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2638          * but we don't have to store this - just ignore it on access check.
2639          */
2640         if (conn->sconn->using_smb2) {
2641                 /*
2642                  * SMB2 doesn't return it (according to Microsoft tests).
2643                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2644                  * File created with access = 0x7 (Read, Write, Delete)
2645                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2646                  */
2647                 fsp->access_mask = access_mask;
2648         } else {
2649                 /* But SMB1 does. */
2650                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2651         }
2652
2653         if (file_existed) {
2654                 /* stat opens on existing files don't get oplocks. */
2655                 if (is_stat_open(open_access_mask)) {
2656                         fsp->oplock_type = NO_OPLOCK;
2657                 }
2658         }
2659
2660         if (new_file_created) {
2661                 info = FILE_WAS_CREATED;
2662         } else {
2663                 if (flags2 & O_TRUNC) {
2664                         info = FILE_WAS_OVERWRITTEN;
2665                 } else {
2666                         info = FILE_WAS_OPENED;
2667                 }
2668         }
2669
2670         if (pinfo) {
2671                 *pinfo = info;
2672         }
2673
2674         /*
2675          * Setup the oplock info in both the shared memory and
2676          * file structs.
2677          */
2678
2679         status = set_file_oplock(fsp, fsp->oplock_type);
2680         if (!NT_STATUS_IS_OK(status)) {
2681                 /*
2682                  * Could not get the kernel oplock
2683                  */
2684                 fsp->oplock_type = NO_OPLOCK;
2685         }
2686
2687         if (!set_share_mode(lck, fsp, get_current_uid(conn),
2688                             req ? req->mid : 0,
2689                             fsp->oplock_type)) {
2690                 TALLOC_FREE(lck);
2691                 fd_close(fsp);
2692                 return NT_STATUS_NO_MEMORY;
2693         }
2694
2695         /* Handle strange delete on close create semantics. */
2696         if (create_options & FILE_DELETE_ON_CLOSE) {
2697
2698                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2699
2700                 if (!NT_STATUS_IS_OK(status)) {
2701                         /* Remember to delete the mode we just added. */
2702                         del_share_mode(lck, fsp);
2703                         TALLOC_FREE(lck);
2704                         fd_close(fsp);
2705                         return status;
2706                 }
2707                 /* Note that here we set the *inital* delete on close flag,
2708                    not the regular one. The magic gets handled in close. */
2709                 fsp->initial_delete_on_close = True;
2710         }
2711
2712         if (info != FILE_WAS_OPENED) {
2713                 /* Files should be initially set as archive */
2714                 if (lp_map_archive(SNUM(conn)) ||
2715                     lp_store_dos_attributes(SNUM(conn))) {
2716                         if (!posix_open) {
2717                                 if (file_set_dosmode(conn, smb_fname,
2718                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2719                                             parent_dir, true) == 0) {
2720                                         unx_mode = smb_fname->st.st_ex_mode;
2721                                 }
2722                         }
2723                 }
2724         }
2725
2726         /* Determine sparse flag. */
2727         if (posix_open) {
2728                 /* POSIX opens are sparse by default. */
2729                 fsp->is_sparse = true;
2730         } else {
2731                 fsp->is_sparse = (file_existed &&
2732                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2733         }
2734
2735         /*
2736          * Take care of inherited ACLs on created files - if default ACL not
2737          * selected.
2738          */
2739
2740         if (!posix_open && new_file_created && !def_acl) {
2741
2742                 int saved_errno = errno; /* We might get ENOSYS in the next
2743                                           * call.. */
2744
2745                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2746                     errno == ENOSYS) {
2747                         errno = saved_errno; /* Ignore ENOSYS */
2748                 }
2749
2750         } else if (new_unx_mode) {
2751
2752                 int ret = -1;
2753
2754                 /* Attributes need changing. File already existed. */
2755
2756                 {
2757                         int saved_errno = errno; /* We might get ENOSYS in the
2758                                                   * next call.. */
2759                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2760
2761                         if (ret == -1 && errno == ENOSYS) {
2762                                 errno = saved_errno; /* Ignore ENOSYS */
2763                         } else {
2764                                 DEBUG(5, ("open_file_ntcreate: reset "
2765                                           "attributes of file %s to 0%o\n",
2766                                           smb_fname_str_dbg(smb_fname),
2767                                           (unsigned int)new_unx_mode));
2768                                 ret = 0; /* Don't do the fchmod below. */
2769                         }
2770                 }
2771
2772                 if ((ret == -1) &&
2773                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2774                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2775                                   "attributes of file %s to 0%o\n",
2776                                   smb_fname_str_dbg(smb_fname),
2777                                   (unsigned int)new_unx_mode));
2778         }
2779
2780         TALLOC_FREE(lck);
2781
2782         return NT_STATUS_OK;
2783 }
2784
2785
2786 /****************************************************************************
2787  Open a file for for write to ensure that we can fchmod it.
2788 ****************************************************************************/
2789
2790 NTSTATUS open_file_fchmod(connection_struct *conn,
2791                           struct smb_filename *smb_fname,
2792                           files_struct **result)
2793 {
2794         if (!VALID_STAT(smb_fname->st)) {
2795                 return NT_STATUS_INVALID_PARAMETER;
2796         }
2797
2798         return SMB_VFS_CREATE_FILE(
2799                 conn,                                   /* conn */
2800                 NULL,                                   /* req */
2801                 0,                                      /* root_dir_fid */
2802                 smb_fname,                              /* fname */
2803                 FILE_WRITE_DATA,                        /* access_mask */
2804                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2805                     FILE_SHARE_DELETE),
2806                 FILE_OPEN,                              /* create_disposition*/
2807                 0,                                      /* create_options */
2808                 0,                                      /* file_attributes */
2809                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2810                 0,                                      /* allocation_size */
2811                 0,                                      /* private_flags */
2812                 NULL,                                   /* sd */
2813                 NULL,                                   /* ea_list */
2814                 result,                                 /* result */
2815                 NULL);                                  /* pinfo */
2816 }
2817
2818 static NTSTATUS mkdir_internal(connection_struct *conn,
2819                                struct smb_filename *smb_dname,
2820                                uint32 file_attributes)
2821 {
2822         mode_t mode;
2823         char *parent_dir = NULL;
2824         NTSTATUS status;
2825         bool posix_open = false;
2826         bool need_re_stat = false;
2827         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2828
2829         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2830                 DEBUG(5,("mkdir_internal: failing share access "
2831                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2832                 return NT_STATUS_ACCESS_DENIED;
2833         }
2834
2835         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2836                             NULL)) {
2837                 return NT_STATUS_NO_MEMORY;
2838         }
2839
2840         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2841                 posix_open = true;
2842                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2843         } else {
2844                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2845         }
2846
2847         status = check_parent_access(conn,
2848                                         smb_dname,
2849                                         access_mask);
2850         if(!NT_STATUS_IS_OK(status)) {
2851                 DEBUG(5,("mkdir_internal: check_parent_access "
2852                         "on directory %s for path %s returned %s\n",
2853                         parent_dir,
2854                         smb_dname->base_name,
2855                         nt_errstr(status) ));
2856                 return status;
2857         }
2858
2859         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2860                 return map_nt_error_from_unix(errno);
2861         }
2862
2863         /* Ensure we're checking for a symlink here.... */
2864         /* We don't want to get caught by a symlink racer. */
2865
2866         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2867                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2868                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2869                 return map_nt_error_from_unix(errno);
2870         }
2871
2872         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2873                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2874                           smb_fname_str_dbg(smb_dname)));
2875                 return NT_STATUS_NOT_A_DIRECTORY;
2876         }
2877
2878         if (lp_store_dos_attributes(SNUM(conn))) {
2879                 if (!posix_open) {
2880                         file_set_dosmode(conn, smb_dname,
2881                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2882                                          parent_dir, true);
2883                 }
2884         }
2885
2886         if (lp_inherit_perms(SNUM(conn))) {
2887                 inherit_access_posix_acl(conn, parent_dir,
2888                                          smb_dname->base_name, mode);
2889                 need_re_stat = true;
2890         }
2891
2892         if (!posix_open) {
2893                 /*
2894                  * Check if high bits should have been set,
2895                  * then (if bits are missing): add them.
2896                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2897                  * dir.
2898                  */
2899                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2900                     (mode & ~smb_dname->st.st_ex_mode)) {
2901                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2902                                       (smb_dname->st.st_ex_mode |
2903                                           (mode & ~smb_dname->st.st_ex_mode)));
2904                         need_re_stat = true;
2905                 }
2906         }
2907
2908         /* Change the owner if required. */
2909         if (lp_inherit_owner(SNUM(conn))) {
2910                 change_dir_owner_to_parent(conn, parent_dir,
2911                                            smb_dname->base_name,
2912                                            &smb_dname->st);
2913                 need_re_stat = true;
2914         }
2915
2916         if (need_re_stat) {
2917                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2918                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2919                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2920                         return map_nt_error_from_unix(errno);
2921                 }
2922         }
2923
2924         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2925                      smb_dname->base_name);
2926
2927         return NT_STATUS_OK;
2928 }
2929
2930 /****************************************************************************
2931  Open a directory from an NT SMB call.
2932 ****************************************************************************/
2933
2934 static NTSTATUS open_directory(connection_struct *conn,
2935                                struct smb_request *req,
2936                                struct smb_filename *smb_dname,
2937                                uint32 access_mask,
2938                                uint32 share_access,
2939                                uint32 create_disposition,
2940                                uint32 create_options,
2941                                uint32 file_attributes,
2942                                int *pinfo,
2943                                files_struct **result)
2944 {
2945         files_struct *fsp = NULL;
2946         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2947         struct share_mode_lock *lck = NULL;
2948         NTSTATUS status;
2949         struct timespec mtimespec;
2950         int info = 0;
2951
2952         if (is_ntfs_stream_smb_fname(smb_dname)) {
2953                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2954                           smb_fname_str_dbg(smb_dname)));
2955                 return NT_STATUS_NOT_A_DIRECTORY;
2956         }
2957
2958         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2959                 /* Ensure we have a directory attribute. */
2960                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2961         }
2962
2963         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2964                  "share_access = 0x%x create_options = 0x%x, "
2965                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2966                  smb_fname_str_dbg(smb_dname),
2967                  (unsigned int)access_mask,
2968                  (unsigned int)share_access,
2969                  (unsigned int)create_options,
2970                  (unsigned int)create_disposition,
2971                  (unsigned int)file_attributes));
2972
2973         status = smbd_calculate_access_mask(conn, smb_dname, false,
2974                                             access_mask, &access_mask);
2975         if (!NT_STATUS_IS_OK(status)) {
2976                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2977                         "on file %s returned %s\n",
2978                         smb_fname_str_dbg(smb_dname),
2979                         nt_errstr(status)));
2980                 return status;
2981         }
2982
2983         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2984                         !security_token_has_privilege(get_current_nttok(conn),
2985                                         SEC_PRIV_SECURITY)) {
2986                 DEBUG(10, ("open_directory: open on %s "
2987                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2988                         smb_fname_str_dbg(smb_dname)));
2989                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2990         }
2991
2992         switch( create_disposition ) {
2993                 case FILE_OPEN:
2994
2995                         if (!dir_existed) {
2996                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2997                         }
2998
2999                         info = FILE_WAS_OPENED;
3000                         break;
3001
3002                 case FILE_CREATE:
3003
3004                         /* If directory exists error. If directory doesn't
3005                          * exist create. */
3006
3007                         if (dir_existed) {
3008                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
3009                                 DEBUG(2, ("open_directory: unable to create "
3010                                           "%s. Error was %s\n",
3011                                           smb_fname_str_dbg(smb_dname),
3012                                           nt_errstr(status)));
3013                                 return status;
3014                         }
3015
3016                         status = mkdir_internal(conn, smb_dname,
3017                                                 file_attributes);
3018
3019                         if (!NT_STATUS_IS_OK(status)) {
3020                                 DEBUG(2, ("open_directory: unable to create "
3021                                           "%s. Error was %s\n",
3022                                           smb_fname_str_dbg(smb_dname),
3023                                           nt_errstr(status)));
3024                                 return status;
3025                         }
3026
3027                         info = FILE_WAS_CREATED;
3028                         break;
3029
3030                 case FILE_OPEN_IF:
3031                         /*
3032                          * If directory exists open. If directory doesn't
3033                          * exist create.
3034                          */
3035
3036                         if (dir_existed) {
3037                                 status = NT_STATUS_OK;
3038                                 info = FILE_WAS_OPENED;
3039                         } else {
3040                                 status = mkdir_internal(conn, smb_dname,
3041                                                 file_attributes);
3042
3043                                 if (NT_STATUS_IS_OK(status)) {
3044                                         info = FILE_WAS_CREATED;
3045                                 } else {
3046                                         /* Cope with create race. */
3047                                         if (!NT_STATUS_EQUAL(status,
3048                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3049                                                 DEBUG(2, ("open_directory: unable to create "
3050                                                         "%s. Error was %s\n",
3051                                                         smb_fname_str_dbg(smb_dname),
3052                                                         nt_errstr(status)));
3053                                                 return status;
3054                                         }
3055                                         info = FILE_WAS_OPENED;
3056                                 }
3057                         }
3058
3059                         break;
3060
3061                 case FILE_SUPERSEDE:
3062                 case FILE_OVERWRITE:
3063                 case FILE_OVERWRITE_IF:
3064                 default:
3065                         DEBUG(5,("open_directory: invalid create_disposition "
3066                                  "0x%x for directory %s\n",
3067                                  (unsigned int)create_disposition,
3068                                  smb_fname_str_dbg(smb_dname)));
3069                         return NT_STATUS_INVALID_PARAMETER;
3070         }
3071
3072         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3073                 DEBUG(5,("open_directory: %s is not a directory !\n",
3074                          smb_fname_str_dbg(smb_dname)));
3075                 return NT_STATUS_NOT_A_DIRECTORY;
3076         }
3077
3078         if (info == FILE_WAS_OPENED) {
3079                 status = smbd_check_access_rights(conn,
3080                                                 smb_dname,
3081                                                 false,
3082                                                 access_mask);
3083                 if (!NT_STATUS_IS_OK(status)) {
3084                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3085                                 "file %s failed with %s\n",
3086                                 smb_fname_str_dbg(smb_dname),
3087                                 nt_errstr(status)));
3088                         return status;
3089                 }
3090         }
3091
3092         status = file_new(req, conn, &fsp);
3093         if(!NT_STATUS_IS_OK(status)) {
3094                 return status;
3095         }
3096
3097         /*
3098          * Setup the files_struct for it.
3099          */
3100
3101         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3102         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3103         fsp->file_pid = req ? req->smbpid : 0;
3104         fsp->can_lock = False;
3105         fsp->can_read = False;
3106         fsp->can_write = False;
3107
3108         fsp->share_access = share_access;
3109         fsp->fh->private_options = 0;
3110         /*
3111          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3112          */
3113         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3114         fsp->print_file = NULL;
3115         fsp->modified = False;
3116         fsp->oplock_type = NO_OPLOCK;
3117         fsp->sent_oplock_break = NO_BREAK_SENT;
3118         fsp->is_directory = True;
3119         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3120         status = fsp_set_smb_fname(fsp, smb_dname);
3121         if (!NT_STATUS_IS_OK(status)) {
3122                 file_free(req, fsp);
3123                 return status;
3124         }
3125
3126         mtimespec = smb_dname->st.st_ex_mtime;
3127
3128 #ifdef O_DIRECTORY
3129         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3130 #else
3131         /* POSIX allows us to open a directory with O_RDONLY. */
3132         status = fd_open(conn, fsp, O_RDONLY, 0);
3133 #endif
3134         if (!NT_STATUS_IS_OK(status)) {
3135                 DEBUG(5, ("open_directory: Could not open fd for "
3136                         "%s (%s)\n",
3137                         smb_fname_str_dbg(smb_dname),
3138                         nt_errstr(status)));
3139                 file_free(req, fsp);
3140                 return status;
3141         }
3142
3143         status = vfs_stat_fsp(fsp);
3144         if (!NT_STATUS_IS_OK(status)) {
3145                 fd_close(fsp);
3146                 file_free(req, fsp);
3147                 return status;
3148         }
3149
3150         /* Ensure there was no race condition. */
3151         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3152                 DEBUG(5,("open_directory: stat struct differs for "
3153                         "directory %s.\n",
3154                         smb_fname_str_dbg(smb_dname)));
3155                 fd_close(fsp);
3156                 file_free(req, fsp);
3157                 return NT_STATUS_ACCESS_DENIED;
3158         }
3159
3160         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3161                                   conn->connectpath, smb_dname,
3162                                   &mtimespec);
3163
3164         if (lck == NULL) {
3165                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3166                           "%s\n", smb_fname_str_dbg(smb_dname)));
3167                 fd_close(fsp);
3168                 file_free(req, fsp);
3169                 return NT_STATUS_SHARING_VIOLATION;
3170         }
3171
3172         if (has_delete_on_close(lck, fsp->name_hash)) {
3173                 TALLOC_FREE(lck);
3174                 fd_close(fsp);
3175                 file_free(req, fsp);
3176                 return NT_STATUS_DELETE_PENDING;
3177         }
3178
3179         status = open_mode_check(conn, lck,
3180                                  access_mask, share_access);
3181
3182         if (!NT_STATUS_IS_OK(status)) {
3183                 TALLOC_FREE(lck);
3184                 fd_close(fsp);
3185                 file_free(req, fsp);
3186                 return status;
3187         }
3188
3189         if (!set_share_mode(lck, fsp, get_current_uid(conn),
3190                             req ? req->mid : 0, NO_OPLOCK)) {
3191                 TALLOC_FREE(lck);
3192                 fd_close(fsp);
3193                 file_free(req, fsp);
3194                 return NT_STATUS_NO_MEMORY;
3195         }
3196
3197         /* For directories the delete on close bit at open time seems
3198            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3199         if (create_options & FILE_DELETE_ON_CLOSE) {
3200                 status = can_set_delete_on_close(fsp, 0);
3201                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3202                         del_share_mode(lck, fsp);
3203                         TALLOC_FREE(lck);
3204                         fd_close(fsp);
3205                         file_free(req, fsp);
3206                         return status;
3207                 }
3208
3209                 if (NT_STATUS_IS_OK(status)) {
3210                         /* Note that here we set the *inital* delete on close flag,
3211                            not the regular one. The magic gets handled in close. */
3212                         fsp->initial_delete_on_close = True;
3213                 }
3214         }
3215
3216         TALLOC_FREE(lck);
3217
3218         if (pinfo) {
3219                 *pinfo = info;
3220         }
3221
3222         *result = fsp;
3223         return NT_STATUS_OK;
3224 }
3225
3226 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3227                           struct smb_filename *smb_dname)
3228 {
3229         NTSTATUS status;
3230         files_struct *fsp;
3231
3232         status = SMB_VFS_CREATE_FILE(
3233                 conn,                                   /* conn */
3234                 req,                                    /* req */
3235                 0,                                      /* root_dir_fid */
3236                 smb_dname,                              /* fname */
3237                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3238                 FILE_SHARE_NONE,                        /* share_access */
3239                 FILE_CREATE,                            /* create_disposition*/
3240                 FILE_DIRECTORY_FILE,                    /* create_options */
3241                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3242                 0,                                      /* oplock_request */
3243                 0,                                      /* allocation_size */
3244                 0,                                      /* private_flags */
3245                 NULL,                                   /* sd */
3246                 NULL,                                   /* ea_list */
3247                 &fsp,                                   /* result */
3248                 NULL);                                  /* pinfo */
3249
3250         if (NT_STATUS_IS_OK(status)) {
3251                 close_file(req, fsp, NORMAL_CLOSE);
3252         }
3253
3254         return status;
3255 }
3256
3257 /****************************************************************************
3258  Receive notification that one of our open files has been renamed by another
3259  smbd process.
3260 ****************************************************************************/
3261
3262 void msg_file_was_renamed(struct messaging_context *msg,
3263                           void *private_data,
3264                           uint32_t msg_type,
3265                           struct server_id server_id,
3266                           DATA_BLOB *data)
3267 {
3268         files_struct *fsp;
3269         char *frm = (char *)data->data;
3270         struct file_id id;
3271         const char *sharepath;
3272         const char *base_name;
3273         const char *stream_name;
3274         struct smb_filename *smb_fname = NULL;
3275         size_t sp_len, bn_len;
3276         NTSTATUS status;
3277         struct smbd_server_connection *sconn =
3278                 talloc_get_type_abort(private_data,
3279                 struct smbd_server_connection);
3280
3281         if (data->data == NULL
3282             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3283                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3284                           (int)data->length));
3285                 return;
3286         }
3287
3288         /* Unpack the message. */
3289         pull_file_id_24(frm, &id);
3290         sharepath = &frm[24];
3291         sp_len = strlen(sharepath);
3292         base_name = sharepath + sp_len + 1;
3293         bn_len = strlen(base_name);
3294         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3295
3296         /* stream_name must always be NULL if there is no stream. */
3297         if (stream_name[0] == '\0') {
3298                 stream_name = NULL;
3299         }
3300
3301         smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3302                                         stream_name, NULL);
3303         if (smb_fname == NULL) {
3304                 return;
3305         }
3306
3307         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3308                 "file_id %s\n",
3309                 sharepath, smb_fname_str_dbg(smb_fname),
3310                 file_id_string_tos(&id)));
3311
3312         for(fsp = file_find_di_first(sconn, id); fsp;
3313             fsp = file_find_di_next(fsp)) {
3314                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3315
3316                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3317                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3318                                 smb_fname_str_dbg(smb_fname)));
3319                         status = fsp_set_smb_fname(fsp, smb_fname);
3320                         if (!NT_STATUS_IS_OK(status)) {
3321                                 goto out;
3322                         }
3323                 } else {
3324                         /* TODO. JRA. */
3325                         /* Now we have the complete path we can work out if this is
3326                            actually within this share and adjust newname accordingly. */
3327                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3328                                 "not sharepath %s) "
3329                                 "%s from %s -> %s\n",
3330                                 fsp->conn->connectpath,
3331                                 sharepath,
3332                                 fsp_fnum_dbg(fsp),
3333                                 fsp_str_dbg(fsp),
3334                                 smb_fname_str_dbg(smb_fname)));
3335                 }
3336         }
3337  out:
3338         TALLOC_FREE(smb_fname);
3339         return;
3340 }
3341
3342 /*
3343  * If a main file is opened for delete, all streams need to be checked for
3344  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3345  * If that works, delete them all by setting the delete on close and close.
3346  */
3347
3348 NTSTATUS open_streams_for_delete(connection_struct *conn,
3349                                         const char *fname)
3350 {
3351         struct stream_struct *stream_info = NULL;
3352         files_struct **streams = NULL;
3353         int i;
3354         unsigned int num_streams = 0;
3355         TALLOC_CTX *frame = talloc_stackframe();
3356         NTSTATUS status;
3357
3358         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3359                                 &num_streams, &stream_info);
3360
3361         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3362             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3363                 DEBUG(10, ("no streams around\n"));
3364                 TALLOC_FREE(frame);
3365                 return NT_STATUS_OK;
3366         }
3367
3368         if (!NT_STATUS_IS_OK(status)) {
3369                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3370                            nt_errstr(status)));
3371                 goto fail;
3372         }
3373
3374         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3375                    num_streams));
3376
3377         if (num_streams == 0) {
3378                 TALLOC_FREE(frame);
3379                 return NT_STATUS_OK;
3380         }
3381
3382         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3383         if (streams == NULL) {
3384                 DEBUG(0, ("talloc failed\n"));
3385                 status = NT_STATUS_NO_MEMORY;
3386                 goto fail;
3387         }
3388
3389         for (i=0; i<num_streams; i++) {
3390                 struct smb_filename *smb_fname;
3391
3392                 if (strequal(stream_info[i].name, "::$DATA")) {
3393                         streams[i] = NULL;
3394                         continue;
3395                 }
3396
3397                 smb_fname = synthetic_smb_fname(
3398                         talloc_tos(), fname, stream_info[i].name, NULL);
3399                 if (smb_fname == NULL) {
3400                         status = NT_STATUS_NO_MEMORY;
3401                         goto fail;
3402                 }
3403
3404                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3405                         DEBUG(10, ("Unable to stat stream: %s\n",
3406                                    smb_fname_str_dbg(smb_fname)));
3407                 }
3408
3409                 status = SMB_VFS_CREATE_FILE(
3410                          conn,                  /* conn */
3411                          NULL,                  /* req */
3412                          0,                     /* root_dir_fid */
3413                          smb_fname,             /* fname */
3414                          DELETE_ACCESS,         /* access_mask */
3415                          (FILE_SHARE_READ |     /* share_access */
3416                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3417                          FILE_OPEN,             /* create_disposition*/
3418                          0,                     /* create_options */
3419                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3420                          0,                     /* oplock_request */
3421                          0,                     /* allocation_size */
3422                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3423                          NULL,                  /* sd */
3424                          NULL,                  /* ea_list */
3425                          &streams[i],           /* result */
3426                          NULL);                 /* pinfo */
3427
3428                 if (!NT_STATUS_IS_OK(status)) {
3429                         DEBUG(10, ("Could not open stream %s: %s\n",
3430                                    smb_fname_str_dbg(smb_fname),
3431                                    nt_errstr(status)));
3432
3433                         TALLOC_FREE(smb_fname);
3434                         break;
3435                 }
3436                 TALLOC_FREE(smb_fname);
3437         }
3438
3439         /*
3440          * don't touch the variable "status" beyond this point :-)
3441          */
3442
3443         for (i -= 1 ; i >= 0; i--) {
3444                 if (streams[i] == NULL) {
3445                         continue;
3446                 }
3447
3448                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3449                            fsp_str_dbg(streams[i])));
3450                 close_file(NULL, streams[i], NORMAL_CLOSE);
3451         }
3452
3453  fail:
3454         TALLOC_FREE(frame);
3455         return status;
3456 }
3457
3458 /*********************************************************************
3459  Create a default ACL by inheriting from the parent. If no inheritance
3460  from the parent available, don't set anything. This will leave the actual
3461  permissions the new file or directory already got from the filesystem
3462  as the NT ACL when read.
3463 *********************************************************************/
3464
3465 static NTSTATUS inherit_new_acl(files_struct *fsp)
3466 {
3467         TALLOC_CTX *frame = talloc_stackframe();
3468         char *parent_name = NULL;
3469         struct security_descriptor *parent_desc = NULL;
3470         NTSTATUS status = NT_STATUS_OK;
3471         struct security_descriptor *psd = NULL;
3472         const struct dom_sid *owner_sid = NULL;
3473         const struct dom_sid *group_sid = NULL;
3474         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3475         struct security_token *token = fsp->conn->session_info->security_token;
3476         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3477         bool inheritable_components = false;
3478         bool try_builtin_administrators = false;
3479         const struct dom_sid *BA_U_sid = NULL;
3480         const struct dom_sid *BA_G_sid = NULL;
3481         bool try_system = false;
3482         const struct dom_sid *SY_U_sid = NULL;
3483         const struct dom_sid *SY_G_sid = NULL;
3484         size_t size = 0;
3485
3486         if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3487                 TALLOC_FREE(frame);
3488                 return NT_STATUS_NO_MEMORY;
3489         }
3490
3491         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3492                                     parent_name,
3493                                     (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3494                                     frame,
3495                                     &parent_desc);
3496         if (!NT_STATUS_IS_OK(status)) {
3497                 TALLOC_FREE(frame);
3498                 return status;
3499         }
3500
3501         inheritable_components = sd_has_inheritable_components(parent_desc,
3502                                         fsp->is_directory);
3503
3504         if (!inheritable_components && !inherit_owner) {
3505                 TALLOC_FREE(frame);
3506                 /* Nothing to inherit and not setting owner. */
3507                 return NT_STATUS_OK;
3508         }
3509
3510         /* Create an inherited descriptor from the parent. */
3511
3512         if (DEBUGLEVEL >= 10) {
3513                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3514                         fsp_str_dbg(fsp) ));
3515                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3516         }
3517
3518         /* Inherit from parent descriptor if "inherit owner" set. */
3519         if (inherit_owner) {
3520                 owner_sid = parent_desc->owner_sid;
3521                 group_sid = parent_desc->group_sid;
3522         }
3523
3524         if (owner_sid == NULL) {
3525                 if (security_token_has_builtin_administrators(token)) {
3526                         try_builtin_administrators = true;
3527                 } else if (security_token_is_system(token)) {
3528                         try_builtin_administrators = true;
3529                         try_system = true;
3530                 }
3531         }
3532
3533         if (group_sid == NULL &&
3534             token->num_sids == PRIMARY_GROUP_SID_INDEX)
3535         {
3536                 if (security_token_is_system(token)) {
3537                         try_builtin_administrators = true;
3538                         try_system = true;
3539                 }
3540         }
3541
3542         if (try_builtin_administrators) {
3543                 struct unixid ids;
3544                 bool ok;
3545
3546                 ZERO_STRUCT(ids);
3547                 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
3548                 if (ok) {
3549                         switch (ids.type) {
3550                         case ID_TYPE_BOTH:
3551                                 BA_U_sid = &global_sid_Builtin_Administrators;
3552                                 BA_G_sid = &global_sid_Builtin_Administrators;
3553                                 break;
3554                         case ID_TYPE_UID:
3555                                 BA_U_sid = &global_sid_Builtin_Administrators;
3556                                 break;
3557                         case ID_TYPE_GID:
3558                                 BA_G_sid = &global_sid_Builtin_Administrators;
3559                                 break;
3560                         default:
3561                                 break;
3562                         }
3563                 }
3564         }
3565
3566         if (try_system) {
3567                 struct unixid ids;
3568                 bool ok;
3569
3570                 ZERO_STRUCT(ids);
3571                 ok = sids_to_unixids(&global_sid_System, 1, &ids);
3572                 if (ok) {
3573                         switch (ids.type) {
3574                         case ID_TYPE_BOTH:
3575                                 SY_U_sid = &global_sid_System;
3576                                 SY_G_sid = &global_sid_System;
3577                                 break;
3578                         case ID_TYPE_UID:
3579                                 SY_U_sid = &global_sid_System;
3580                                 break;
3581                         case ID_TYPE_GID:
3582                                 SY_G_sid = &global_sid_System;
3583                                 break;
3584                         default:
3585                                 break;
3586                         }
3587                 }
3588         }
3589
3590         if (owner_sid == NULL) {
3591                 owner_sid = BA_U_sid;
3592         }
3593
3594         if (owner_sid == NULL) {
3595                 owner_sid = SY_U_sid;
3596         }
3597
3598         if (group_sid == NULL) {
3599                 group_sid = SY_G_sid;
3600         }
3601
3602         if (try_system && group_sid == NULL) {
3603                 group_sid = BA_G_sid;
3604         }
3605
3606         if (owner_sid == NULL) {
3607                 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3608         }
3609         if (group_sid == NULL) {
3610                 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
3611                         group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3612                 } else {
3613                         group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
3614                 }
3615         }
3616
3617         status = se_create_child_secdesc(frame,
3618                         &psd,
3619                         &size,
3620                         parent_desc,
3621                         owner_sid,
3622                         group_sid,
3623                         fsp->is_directory);
3624         if (!NT_STATUS_IS_OK(status)) {
3625                 TALLOC_FREE(frame);
3626                 return status;
3627         }
3628
3629         /* If inheritable_components == false,
3630            se_create_child_secdesc()
3631            creates a security desriptor with a NULL dacl
3632            entry, but with SEC_DESC_DACL_PRESENT. We need
3633            to remove that flag. */
3634
3635         if (!inheritable_components) {
3636                 security_info_sent &= ~SECINFO_DACL;
3637                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3638         }
3639
3640         if (DEBUGLEVEL >= 10) {
3641                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3642                         fsp_str_dbg(fsp) ));
3643                 NDR_PRINT_DEBUG(security_descriptor, psd);
3644         }
3645
3646         if (inherit_owner) {
3647                 /* We need to be root to force this. */
3648                 become_root();
3649         }
3650         status = SMB_VFS_FSET_NT_ACL(fsp,
3651                         security_info_sent,
3652                         psd);
3653         if (inherit_owner) {
3654                 unbecome_root();
3655         }
3656         TALLOC_FREE(frame);
3657         return status;
3658 }
3659
3660 /*
3661  * Wrapper around open_file_ntcreate and open_directory
3662  */
3663
3664 static NTSTATUS create_file_unixpath(connection_struct *conn,
3665                                      struct smb_request *req,
3666                                      struct smb_filename *smb_fname,
3667                                      uint32_t access_mask,
3668                                      uint32_t share_access,
3669                                      uint32_t create_disposition,
3670                                      uint32_t create_options,
3671                                      uint32_t file_attributes,
3672                                      uint32_t oplock_request,
3673                                      uint64_t allocation_size,
3674                                      uint32_t private_flags,
3675                                      struct security_descriptor *sd,
3676                                      struct ea_list *ea_list,
3677
3678                                      files_struct **result,
3679                                      int *pinfo)
3680 {
3681         int info = FILE_WAS_OPENED;
3682         files_struct *base_fsp = NULL;
3683         files_struct *fsp = NULL;
3684         NTSTATUS status;
3685
3686         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3687                   "file_attributes = 0x%x, share_access = 0x%x, "
3688                   "create_disposition = 0x%x create_options = 0x%x "
3689                   "oplock_request = 0x%x private_flags = 0x%x "
3690                   "ea_list = 0x%p, sd = 0x%p, "
3691                   "fname = %s\n",
3692                   (unsigned int)access_mask,
3693                   (unsigned int)file_attributes,
3694                   (unsigned int)share_access,
3695                   (unsigned int)create_disposition,
3696                   (unsigned int)create_options,
3697                   (unsigned int)oplock_request,
3698                   (unsigned int)private_flags,
3699                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3700
3701         if (create_options & FILE_OPEN_BY_FILE_ID) {
3702                 status = NT_STATUS_NOT_SUPPORTED;
3703                 goto fail;
3704         }
3705
3706         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3707                 status = NT_STATUS_INVALID_PARAMETER;
3708                 goto fail;
3709         }
3710
3711         if (req == NULL) {
3712                 oplock_request |= INTERNAL_OPEN_ONLY;
3713         }
3714
3715         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3716             && (access_mask & DELETE_ACCESS)
3717             && !is_ntfs_stream_smb_fname(smb_fname)) {
3718                 /*
3719                  * We can't open a file with DELETE access if any of the
3720                  * streams is open without FILE_SHARE_DELETE
3721                  */
3722                 status = open_streams_for_delete(conn, smb_fname->base_name);
3723
3724                 if (!NT_STATUS_IS_OK(status)) {
3725                         goto fail;
3726                 }
3727         }
3728
3729         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3730                         !security_token_has_privilege(get_current_nttok(conn),
3731                                         SEC_PRIV_SECURITY)) {
3732                 DEBUG(10, ("create_file_unixpath: open on %s "
3733                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3734                         smb_fname_str_dbg(smb_fname)));
3735                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3736                 goto fail;
3737         }
3738
3739         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3740             && is_ntfs_stream_smb_fname(smb_fname)
3741             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3742                 uint32 base_create_disposition;
3743                 struct smb_filename *smb_fname_base = NULL;
3744
3745                 if (create_options & FILE_DIRECTORY_FILE) {
3746                         status = NT_STATUS_NOT_A_DIRECTORY;
3747                         goto fail;
3748                 }
3749
3750                 switch (create_disposition) {
3751                 case FILE_OPEN:
3752                         base_create_disposition = FILE_OPEN;
3753                         break;
3754                 default:
3755                         base_create_disposition = FILE_OPEN_IF;
3756                         break;
3757                 }
3758
3759                 /* Create an smb_filename with stream_name == NULL. */
3760                 smb_fname_base = synthetic_smb_fname(talloc_tos(),
3761                                                      smb_fname->base_name,
3762                                                      NULL, NULL);
3763                 if (smb_fname_base == NULL) {
3764                         status = NT_STATUS_NO_MEMORY;
3765                         goto fail;
3766                 }
3767
3768                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3769                         DEBUG(10, ("Unable to stat stream: %s\n",
3770                                    smb_fname_str_dbg(smb_fname_base)));
3771                 }
3772
3773                 /* Open the base file. */
3774                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3775                                               FILE_SHARE_READ
3776                                               | FILE_SHARE_WRITE
3777                                               | FILE_SHARE_DELETE,
3778                                               base_create_disposition,
3779                                               0, 0, 0, 0, 0, NULL, NULL,
3780                                               &base_fsp, NULL);
3781                 TALLOC_FREE(smb_fname_base);
3782
3783                 if (!NT_STATUS_IS_OK(status)) {
3784                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3785                                    "%s\n", smb_fname->base_name,
3786                                    nt_errstr(status)));
3787                         goto fail;
3788                 }
3789                 /* we don't need to low level fd */
3790                 fd_close(base_fsp);
3791         }
3792
3793         /*
3794          * If it's a request for a directory open, deal with it separately.
3795          */
3796
3797         if (create_options & FILE_DIRECTORY_FILE) {
3798
3799                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3800                         status = NT_STATUS_INVALID_PARAMETER;
3801                         goto fail;
3802                 }
3803
3804                 /* Can't open a temp directory. IFS kit test. */
3805                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3806                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3807                         status = NT_STATUS_INVALID_PARAMETER;
3808                         goto fail;
3809                 }
3810
3811                 /*
3812                  * We will get a create directory here if the Win32
3813                  * app specified a security descriptor in the
3814                  * CreateDirectory() call.
3815                  */
3816
3817                 oplock_request = 0;
3818                 status = open_directory(
3819                         conn, req, smb_fname, access_mask, share_access,
3820                         create_disposition, create_options, file_attributes,
3821                         &info, &fsp);
3822         } else {
3823
3824                 /*
3825                  * Ordinary file case.
3826                  */
3827
3828                 status = file_new(req, conn, &fsp);
3829                 if(!NT_STATUS_IS_OK(status)) {
3830                         goto fail;
3831                 }
3832
3833                 status = fsp_set_smb_fname(fsp, smb_fname);
3834                 if (!NT_STATUS_IS_OK(status)) {
3835                         goto fail;
3836                 }
3837
3838                 if (base_fsp) {
3839                         /*
3840                          * We're opening the stream element of a
3841                          * base_fsp we already opened. Set up the
3842                          * base_fsp pointer.
3843                          */
3844                         fsp->base_fsp = base_fsp;
3845                 }
3846
3847                 if (allocation_size) {
3848                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3849                                                         allocation_size);
3850                 }
3851
3852                 status = open_file_ntcreate(conn,
3853                                             req,
3854                                             access_mask,
3855                                             share_access,
3856                                             create_disposition,
3857                                             create_options,
3858                                             file_attributes,
3859                                             oplock_request,
3860                                             private_flags,
3861                                             &info,
3862                                             fsp);
3863
3864                 if(!NT_STATUS_IS_OK(status)) {
3865                         file_free(req, fsp);
3866                         fsp = NULL;
3867                 }
3868
3869                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3870
3871                         /* A stream open never opens a directory */
3872
3873                         if (base_fsp) {
3874                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3875                                 goto fail;
3876                         }
3877
3878                         /*
3879                          * Fail the open if it was explicitly a non-directory
3880                          * file.
3881                          */
3882
3883                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3884                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3885                                 goto fail;
3886                         }
3887
3888                         oplock_request = 0;
3889                         status = open_directory(
3890                                 conn, req, smb_fname, access_mask,
3891                                 share_access, create_disposition,
3892                                 create_options, file_attributes,
3893                                 &info, &fsp);
3894                 }
3895         }
3896
3897         if (!NT_STATUS_IS_OK(status)) {
3898                 goto fail;
3899         }
3900
3901         fsp->base_fsp = base_fsp;
3902
3903         if ((ea_list != NULL) &&
3904             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3905                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3906                 if (!NT_STATUS_IS_OK(status)) {
3907                         goto fail;
3908                 }
3909         }
3910
3911         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3912                 status = NT_STATUS_ACCESS_DENIED;
3913                 goto fail;
3914         }
3915
3916         /* Save the requested allocation size. */
3917         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3918                 if (allocation_size
3919                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3920                         fsp->initial_allocation_size = smb_roundup(
3921                                 fsp->conn, allocation_size);
3922                         if (fsp->is_directory) {
3923                                 /* Can't set allocation size on a directory. */
3924                                 status = NT_STATUS_ACCESS_DENIED;
3925                                 goto fail;
3926                         }
3927                         if (vfs_allocate_file_space(
3928                                     fsp, fsp->initial_allocation_size) == -1) {
3929                                 status = NT_STATUS_DISK_FULL;
3930                                 goto fail;
3931                         }
3932                 } else {
3933                         fsp->initial_allocation_size = smb_roundup(
3934                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3935                 }
3936         } else {
3937                 fsp->initial_allocation_size = 0;
3938         }
3939
3940         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3941                                 fsp->base_fsp == NULL) {
3942                 if (sd != NULL) {
3943                         /*
3944                          * According to the MS documentation, the only time the security
3945                          * descriptor is applied to the opened file is iff we *created* the
3946                          * file; an existing file stays the same.
3947                          *
3948                          * Also, it seems (from observation) that you can open the file with
3949                          * any access mask but you can still write the sd. We need to override
3950                          * the granted access before we call set_sd
3951                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3952                          */
3953
3954                         uint32_t sec_info_sent;
3955                         uint32_t saved_access_mask = fsp->access_mask;
3956
3957                         sec_info_sent = get_sec_info(sd);
3958
3959                         fsp->access_mask = FILE_GENERIC_ALL;
3960
3961                         if (sec_info_sent & (SECINFO_OWNER|
3962                                                 SECINFO_GROUP|
3963                                                 SECINFO_DACL|
3964                                                 SECINFO_SACL)) {
3965                                 status = set_sd(fsp, sd, sec_info_sent);
3966                         }
3967
3968                         fsp->access_mask = saved_access_mask;
3969
3970                         if (!NT_STATUS_IS_OK(status)) {
3971                                 goto fail;
3972                         }
3973                 } else if (lp_inherit_acls(SNUM(conn))) {
3974                         /* Inherit from parent. Errors here are not fatal. */
3975                         status = inherit_new_acl(fsp);
3976                         if (!NT_STATUS_IS_OK(status)) {
3977                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3978                                         fsp_str_dbg(fsp),
3979                                         nt_errstr(status) ));
3980                         }
3981                 }
3982         }
3983
3984         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3985
3986         *result = fsp;
3987         if (pinfo != NULL) {
3988                 *pinfo = info;
3989         }
3990
3991         smb_fname->st = fsp->fsp_name->st;
3992
3993         return NT_STATUS_OK;
3994
3995  fail:
3996         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3997
3998         if (fsp != NULL) {
3999                 if (base_fsp && fsp->base_fsp == base_fsp) {
4000                         /*
4001                          * The close_file below will close
4002                          * fsp->base_fsp.
4003                          */
4004                         base_fsp = NULL;
4005                 }
4006                 close_file(req, fsp, ERROR_CLOSE);
4007                 fsp = NULL;
4008         }
4009         if (base_fsp != NULL) {
4010                 close_file(req, base_fsp, ERROR_CLOSE);
4011                 base_fsp = NULL;
4012         }
4013         return status;
4014 }
4015
4016 /*
4017  * Calculate the full path name given a relative fid.
4018  */
4019 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4020                                    struct smb_request *req,
4021                                    uint16_t root_dir_fid,
4022                                    const struct smb_filename *smb_fname,
4023                                    struct smb_filename **smb_fname_out)
4024 {
4025         files_struct *dir_fsp;
4026         char *parent_fname = NULL;
4027         char *new_base_name = NULL;
4028         NTSTATUS status;
4029
4030         if (root_dir_fid == 0 || !smb_fname) {
4031                 status = NT_STATUS_INTERNAL_ERROR;
4032                 goto out;
4033         }
4034
4035         dir_fsp = file_fsp(req, root_dir_fid);
4036
4037         if (dir_fsp == NULL) {
4038                 status = NT_STATUS_INVALID_HANDLE;
4039                 goto out;
4040         }
4041
4042         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4043                 status = NT_STATUS_INVALID_HANDLE;
4044                 goto out;
4045         }
4046
4047         if (!dir_fsp->is_directory) {
4048
4049                 /*
4050                  * Check to see if this is a mac fork of some kind.
4051                  */
4052
4053                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4054                     is_ntfs_stream_smb_fname(smb_fname)) {
4055                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4056                         goto out;
4057                 }
4058
4059                 /*
4060                   we need to handle the case when we get a
4061                   relative open relative to a file and the
4062                   pathname is blank - this is a reopen!
4063                   (hint from demyn plantenberg)
4064                 */
4065
4066                 status = NT_STATUS_INVALID_HANDLE;
4067                 goto out;
4068         }
4069
4070         if (ISDOT(dir_fsp->fsp_name->base_name)) {
4071                 /*
4072                  * We're at the toplevel dir, the final file name
4073                  * must not contain ./, as this is filtered out
4074                  * normally by srvstr_get_path and unix_convert
4075                  * explicitly rejects paths containing ./.
4076                  */
4077                 parent_fname = talloc_strdup(talloc_tos(), "");
4078                 if (parent_fname == NULL) {
4079                         status = NT_STATUS_NO_MEMORY;
4080                         goto out;
4081                 }
4082         } else {
4083                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4084
4085                 /*
4086                  * Copy in the base directory name.
4087                  */
4088
4089                 parent_fname = talloc_array(talloc_tos(), char,
4090                     dir_name_len+2);
4091                 if (parent_fname == NULL) {
4092                         status = NT_STATUS_NO_MEMORY;
4093                         goto out;
4094                 }
4095                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4096                     dir_name_len+1);
4097
4098                 /*
4099                  * Ensure it ends in a '/'.
4100                  * We used TALLOC_SIZE +2 to add space for the '/'.
4101                  */
4102
4103                 if(dir_name_len
4104                     && (parent_fname[dir_name_len-1] != '\\')
4105                     && (parent_fname[dir_name_len-1] != '/')) {
4106                         parent_fname[dir_name_len] = '/';
4107                         parent_fname[dir_name_len+1] = '\0';
4108                 }
4109         }
4110
4111         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4112                                         smb_fname->base_name);
4113         if (new_base_name == NULL) {
4114                 status = NT_STATUS_NO_MEMORY;
4115                 goto out;
4116         }
4117
4118         status = filename_convert(req,
4119                                 conn,
4120                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
4121                                 new_base_name,
4122                                 0,
4123                                 NULL,
4124                                 smb_fname_out);
4125         if (!NT_STATUS_IS_OK(status)) {
4126                 goto out;
4127         }
4128
4129  out:
4130         TALLOC_FREE(parent_fname);
4131         TALLOC_FREE(new_base_name);
4132         return status;
4133 }
4134
4135 NTSTATUS create_file_default(connection_struct *conn,
4136                              struct smb_request *req,
4137                              uint16_t root_dir_fid,
4138                              struct smb_filename *smb_fname,
4139                              uint32_t access_mask,
4140                              uint32_t share_access,
4141                              uint32_t create_disposition,
4142                              uint32_t create_options,
4143                              uint32_t file_attributes,
4144                              uint32_t oplock_request,
4145                              uint64_t allocation_size,
4146                              uint32_t private_flags,
4147                              struct security_descriptor *sd,
4148                              struct ea_list *ea_list,
4149                              files_struct **result,
4150                              int *pinfo)
4151 {
4152         int info = FILE_WAS_OPENED;
4153         files_struct *fsp = NULL;
4154         NTSTATUS status;
4155         bool stream_name = false;
4156
4157         DEBUG(10,("create_file: access_mask = 0x%x "
4158                   "file_attributes = 0x%x, share_access = 0x%x, "
4159                   "create_disposition = 0x%x create_options = 0x%x "
4160                   "oplock_request = 0x%x "
4161                   "private_flags = 0x%x "
4162                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4163                   "fname = %s\n",
4164                   (unsigned int)access_mask,
4165                   (unsigned int)file_attributes,
4166                   (unsigned int)share_access,
4167                   (unsigned int)create_disposition,
4168                   (unsigned int)create_options,
4169                   (unsigned int)oplock_request,
4170                   (unsigned int)private_flags,
4171                   (unsigned int)root_dir_fid,
4172                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4173
4174         /*
4175          * Calculate the filename from the root_dir_if if necessary.
4176          */
4177
4178         if (root_dir_fid != 0) {
4179                 struct smb_filename *smb_fname_out = NULL;
4180                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4181                                                    smb_fname, &smb_fname_out);
4182                 if (!NT_STATUS_IS_OK(status)) {
4183                         goto fail;
4184                 }
4185                 smb_fname = smb_fname_out;
4186         }
4187
4188         /*
4189          * Check to see if this is a mac fork of some kind.
4190          */
4191
4192         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4193         if (stream_name) {
4194                 enum FAKE_FILE_TYPE fake_file_type;
4195
4196                 fake_file_type = is_fake_file(smb_fname);
4197
4198                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4199
4200                         /*
4201                          * Here we go! support for changing the disk quotas
4202                          * --metze
4203                          *
4204                          * We need to fake up to open this MAGIC QUOTA file
4205                          * and return a valid FID.
4206                          *
4207                          * w2k close this file directly after openening xp
4208                          * also tries a QUERY_FILE_INFO on the file and then
4209                          * close it
4210                          */
4211                         status = open_fake_file(req, conn, req->vuid,
4212                                                 fake_file_type, smb_fname,
4213                                                 access_mask, &fsp);
4214                         if (!NT_STATUS_IS_OK(status)) {
4215                                 goto fail;
4216                         }
4217
4218                         ZERO_STRUCT(smb_fname->st);
4219                         goto done;
4220                 }
4221
4222                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4223                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4224                         goto fail;
4225                 }
4226         }
4227
4228         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4229                 int ret;
4230                 smb_fname->stream_name = NULL;
4231                 /* We have to handle this error here. */
4232                 if (create_options & FILE_DIRECTORY_FILE) {
4233                         status = NT_STATUS_NOT_A_DIRECTORY;
4234                         goto fail;
4235                 }
4236                 if (lp_posix_pathnames()) {
4237                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4238                 } else {
4239                         ret = SMB_VFS_STAT(conn, smb_fname);
4240                 }
4241
4242                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4243                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4244                         goto fail;
4245                 }
4246         }
4247
4248         status = create_file_unixpath(
4249                 conn, req, smb_fname, access_mask, share_access,
4250                 create_disposition, create_options, file_attributes,
4251                 oplock_request, allocation_size, private_flags,
4252                 sd, ea_list,
4253                 &fsp, &info);
4254
4255         if (!NT_STATUS_IS_OK(status)) {
4256                 goto fail;
4257         }
4258
4259  done:
4260         DEBUG(10, ("create_file: info=%d\n", info));
4261
4262         *result = fsp;
4263         if (pinfo != NULL) {
4264                 *pinfo = info;
4265         }
4266         return NT_STATUS_OK;
4267
4268  fail:
4269         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4270
4271         if (fsp != NULL) {
4272                 close_file(req, fsp, ERROR_CLOSE);
4273                 fsp = NULL;
4274         }
4275         return status;
4276 }