source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "../librpc/gen_ndr/idmap.h"
  32 #include "passdb/lookup_sid.h"
  33 #include "auth.h"
  34 #include "serverid.h"
  35 #include "messages.h"
  36 #include "source3/lib/dbwrap/dbwrap_watch.h"
  37
  38 extern const struct generic_mapping file_generic_mapping;
  39
  40 struct deferred_open_record {
  41         bool delayed_for_oplocks;
  42         bool async_open;
  43         struct file_id id;
  44 };
  45
  46 /****************************************************************************
  47  If the requester wanted DELETE_ACCESS and was rejected because
  48  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  49  overrides this.
  50 ****************************************************************************/
  51
  52 static bool parent_override_delete(connection_struct *conn,
  53                                         const struct smb_filename *smb_fname,
  54                                         uint32_t access_mask,
  55                                         uint32_t rejected_mask)
  56 {
  57         if ((access_mask & DELETE_ACCESS) &&
  58                     (rejected_mask & DELETE_ACCESS) &&
  59                     can_delete_file_in_directory(conn, smb_fname)) {
  60                 return true;
  61         }
  62         return false;
  63 }
  64
  65 /****************************************************************************
  66  Check if we have open rights.
  67 ****************************************************************************/
  68
  69 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  70                                 const struct smb_filename *smb_fname,
  71                                 bool use_privs,
  72                                 uint32_t access_mask)
  73 {
  74         /* Check if we have rights to open. */
  75         NTSTATUS status;
  76         struct security_descriptor *sd = NULL;
  77         uint32_t rejected_share_access;
  78         uint32_t rejected_mask = access_mask;
  79         uint32_t do_not_check_mask = 0;
  80
  81         rejected_share_access = access_mask & ~(conn->share_access);
  82
  83         if (rejected_share_access) {
  84                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  85                         "on %s (0x%x)\n",
  86                         (unsigned int)access_mask,
  87                         smb_fname_str_dbg(smb_fname),
  88                         (unsigned int)rejected_share_access ));
  89                 return NT_STATUS_ACCESS_DENIED;
  90         }
  91
  92         if (!use_privs && get_current_uid(conn) == (uid_t)0) {
  93                 /* I'm sorry sir, I didn't know you were root... */
  94                 DEBUG(10,("smbd_check_access_rights: root override "
  95                         "on %s. Granting 0x%x\n",
  96                         smb_fname_str_dbg(smb_fname),
  97                         (unsigned int)access_mask ));
  98                 return NT_STATUS_OK;
  99         }
 100
 101         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
 102                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 103                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
 104                         smb_fname_str_dbg(smb_fname),
 105                         (unsigned int)access_mask ));
 106                 return NT_STATUS_OK;
 107         }
 108
 109         if (access_mask == DELETE_ACCESS &&
 110                         VALID_STAT(smb_fname->st) &&
 111                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 112                 /* We can always delete a symlink. */
 113                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 114                         "on DELETE_ACCESS on symlink %s.\n",
 115                         smb_fname_str_dbg(smb_fname) ));
 116                 return NT_STATUS_OK;
 117         }
 118
 119         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 120                         (SECINFO_OWNER |
 121                         SECINFO_GROUP |
 122                          SECINFO_DACL), talloc_tos(), &sd);
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 126                         "on %s: %s\n",
 127                         smb_fname_str_dbg(smb_fname),
 128                         nt_errstr(status)));
 129
 130                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 131                         goto access_denied;
 132                 }
 133
 134                 return status;
 135         }
 136
 137         /*
 138          * If we can access the path to this file, by
 139          * default we have FILE_READ_ATTRIBUTES from the
 140          * containing directory. See the section:
 141          * "Algorithm to Check Access to an Existing File"
 142          * in MS-FSA.pdf.
 143          *
 144          * se_file_access_check() also takes care of
 145          * owner WRITE_DAC and READ_CONTROL.
 146          */
 147         do_not_check_mask = FILE_READ_ATTRIBUTES;
 148
 149         /*
 150          * Samba 3.6 and earlier granted execute access even
 151          * if the ACL did not contain execute rights.
 152          * Samba 4.0 is more correct and checks it.
 153          * The compatibilty mode allows to skip this check
 154          * to smoothen upgrades.
 155          */
 156         if (lp_acl_allow_execute_always(SNUM(conn))) {
 157                 do_not_check_mask |= FILE_EXECUTE;
 158         }
 159
 160         status = se_file_access_check(sd,
 161                                 get_current_nttok(conn),
 162                                 use_privs,
 163                                 (access_mask & ~do_not_check_mask),
 164                                 &rejected_mask);
 165
 166         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 167                 "0x%x returning 0x%x (%s)\n",
 168                 smb_fname_str_dbg(smb_fname),
 169                 (unsigned int)access_mask,
 170                 (unsigned int)rejected_mask,
 171                 nt_errstr(status) ));
 172
 173         if (!NT_STATUS_IS_OK(status)) {
 174                 if (DEBUGLEVEL >= 10) {
 175                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 176                                 smb_fname_str_dbg(smb_fname) ));
 177                         NDR_PRINT_DEBUG(security_descriptor, sd);
 178                 }
 179         }
 180
 181         TALLOC_FREE(sd);
 182
 183         if (NT_STATUS_IS_OK(status) ||
 184                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 185                 return status;
 186         }
 187
 188         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 189
 190   access_denied:
 191
 192         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 193                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 194                         !lp_store_dos_attributes(SNUM(conn)) &&
 195                         (lp_map_readonly(SNUM(conn)) ||
 196                         lp_map_archive(SNUM(conn)) ||
 197                         lp_map_hidden(SNUM(conn)) ||
 198                         lp_map_system(SNUM(conn)))) {
 199                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 200
 201                 DEBUG(10,("smbd_check_access_rights: "
 202                         "overrode "
 203                         "FILE_WRITE_ATTRIBUTES "
 204                         "on file %s\n",
 205                         smb_fname_str_dbg(smb_fname)));
 206         }
 207
 208         if (parent_override_delete(conn,
 209                                 smb_fname,
 210                                 access_mask,
 211                                 rejected_mask)) {
 212                 /* Were we trying to do an open
 213                  * for delete and didn't get DELETE
 214                  * access (only) ? Check if the
 215                  * directory allows DELETE_CHILD.
 216                  * See here:
 217                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 218                  * for details. */
 219
 220                 rejected_mask &= ~DELETE_ACCESS;
 221
 222                 DEBUG(10,("smbd_check_access_rights: "
 223                         "overrode "
 224                         "DELETE_ACCESS on "
 225                         "file %s\n",
 226                         smb_fname_str_dbg(smb_fname)));
 227         }
 228
 229         if (rejected_mask != 0) {
 230                 return NT_STATUS_ACCESS_DENIED;
 231         }
 232         return NT_STATUS_OK;
 233 }
 234
 235 static NTSTATUS check_parent_access(struct connection_struct *conn,
 236                                 struct smb_filename *smb_fname,
 237                                 uint32_t access_mask)
 238 {
 239         NTSTATUS status;
 240         char *parent_dir = NULL;
 241         struct security_descriptor *parent_sd = NULL;
 242         uint32_t access_granted = 0;
 243
 244         if (!parent_dirname(talloc_tos(),
 245                                 smb_fname->base_name,
 246                                 &parent_dir,
 247                                 NULL)) {
 248                 return NT_STATUS_NO_MEMORY;
 249         }
 250
 251         if (get_current_uid(conn) == (uid_t)0) {
 252                 /* I'm sorry sir, I didn't know you were root... */
 253                 DEBUG(10,("check_parent_access: root override "
 254                         "on %s. Granting 0x%x\n",
 255                         smb_fname_str_dbg(smb_fname),
 256                         (unsigned int)access_mask ));
 257                 return NT_STATUS_OK;
 258         }
 259
 260         status = SMB_VFS_GET_NT_ACL(conn,
 261                                 parent_dir,
 262                                 SECINFO_DACL,
 263                                     talloc_tos(),
 264                                 &parent_sd);
 265
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 268                         "%s with error %s\n",
 269                         parent_dir,
 270                         nt_errstr(status)));
 271                 return status;
 272         }
 273
 274         /*
 275          * If we can access the path to this file, by
 276          * default we have FILE_READ_ATTRIBUTES from the
 277          * containing directory. See the section:
 278          * "Algorithm to Check Access to an Existing File"
 279          * in MS-FSA.pdf.
 280          *
 281          * se_file_access_check() also takes care of
 282          * owner WRITE_DAC and READ_CONTROL.
 283          */
 284         status = se_file_access_check(parent_sd,
 285                                 get_current_nttok(conn),
 286                                 false,
 287                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 288                                 &access_granted);
 289         if(!NT_STATUS_IS_OK(status)) {
 290                 DEBUG(5,("check_parent_access: access check "
 291                         "on directory %s for "
 292                         "path %s for mask 0x%x returned (0x%x) %s\n",
 293                         parent_dir,
 294                         smb_fname->base_name,
 295                         access_mask,
 296                         access_granted,
 297                         nt_errstr(status) ));
 298                 return status;
 299         }
 300
 301         return NT_STATUS_OK;
 302 }
 303
 304 /****************************************************************************
 305  fd support routines - attempt to do a dos_open.
 306 ****************************************************************************/
 307
 308 NTSTATUS fd_open(struct connection_struct *conn,
 309                  files_struct *fsp,
 310                  int flags,
 311                  mode_t mode)
 312 {
 313         struct smb_filename *smb_fname = fsp->fsp_name;
 314         NTSTATUS status = NT_STATUS_OK;
 315
 316 #ifdef O_NOFOLLOW
 317         /*
 318          * Never follow symlinks on a POSIX client. The
 319          * client should be doing this.
 320          */
 321
 322         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 323                 flags |= O_NOFOLLOW;
 324         }
 325 #endif
 326
 327         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 328         if (fsp->fh->fd == -1) {
 329                 int posix_errno = errno;
 330 #ifdef O_NOFOLLOW
 331 #if defined(ENOTSUP) && defined(OSF1)
 332                 /* handle special Tru64 errno */
 333                 if (errno == ENOTSUP) {
 334                         posix_errno = ELOOP;
 335                 }
 336 #endif /* ENOTSUP */
 337 #ifdef EFTYPE
 338                 /* fix broken NetBSD errno */
 339                 if (errno == EFTYPE) {
 340                         posix_errno = ELOOP;
 341                 }
 342 #endif /* EFTYPE */
 343                 /* fix broken FreeBSD errno */
 344                 if (errno == EMLINK) {
 345                         posix_errno = ELOOP;
 346                 }
 347 #endif /* O_NOFOLLOW */
 348                 status = map_nt_error_from_unix(posix_errno);
 349                 if (errno == EMFILE) {
 350                         static time_t last_warned = 0L;
 351
 352                         if (time((time_t *) NULL) > last_warned) {
 353                                 DEBUG(0,("Too many open files, unable "
 354                                         "to open more!  smbd's max "
 355                                         "open files = %d\n",
 356                                         lp_max_open_files()));
 357                                 last_warned = time((time_t *) NULL);
 358                         }
 359                 }
 360
 361         }
 362
 363         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 364                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 365                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 366
 367         return status;
 368 }
 369
 370 /****************************************************************************
 371  Close the file associated with a fsp.
 372 ****************************************************************************/
 373
 374 NTSTATUS fd_close(files_struct *fsp)
 375 {
 376         int ret;
 377
 378         if (fsp->dptr) {
 379                 dptr_CloseDir(fsp);
 380         }
 381         if (fsp->fh->fd == -1) {
 382                 return NT_STATUS_OK; /* What we used to call a stat open. */
 383         }
 384         if (fsp->fh->ref_count > 1) {
 385                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 386         }
 387
 388         ret = SMB_VFS_CLOSE(fsp);
 389         fsp->fh->fd = -1;
 390         if (ret == -1) {
 391                 return map_nt_error_from_unix(errno);
 392         }
 393         return NT_STATUS_OK;
 394 }
 395
 396 /****************************************************************************
 397  Change the ownership of a file to that of the parent directory.
 398  Do this by fd if possible.
 399 ****************************************************************************/
 400
 401 void change_file_owner_to_parent(connection_struct *conn,
 402                                         const char *inherit_from_dir,
 403                                         files_struct *fsp)
 404 {
 405         struct smb_filename *smb_fname_parent;
 406         int ret;
 407
 408         smb_fname_parent = synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 409                                                NULL, NULL);
 410         if (smb_fname_parent == NULL) {
 411                 return;
 412         }
 413
 414         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 415         if (ret == -1) {
 416                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 417                          "directory %s. Error was %s\n",
 418                          smb_fname_str_dbg(smb_fname_parent),
 419                          strerror(errno)));
 420                 TALLOC_FREE(smb_fname_parent);
 421                 return;
 422         }
 423
 424         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 425                 /* Already this uid - no need to change. */
 426                 DEBUG(10,("change_file_owner_to_parent: file %s "
 427                         "is already owned by uid %d\n",
 428                         fsp_str_dbg(fsp),
 429                         (int)fsp->fsp_name->st.st_ex_uid ));
 430                 TALLOC_FREE(smb_fname_parent);
 431                 return;
 432         }
 433
 434         become_root();
 435         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 436         unbecome_root();
 437         if (ret == -1) {
 438                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 439                          "file %s to parent directory uid %u. Error "
 440                          "was %s\n", fsp_str_dbg(fsp),
 441                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 442                          strerror(errno) ));
 443         } else {
 444                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 445                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 446                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 447                 /* Ensure the uid entry is updated. */
 448                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 449         }
 450
 451         TALLOC_FREE(smb_fname_parent);
 452 }
 453
 454 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 455                                        const char *inherit_from_dir,
 456                                        const char *fname,
 457                                        SMB_STRUCT_STAT *psbuf)
 458 {
 459         struct smb_filename *smb_fname_parent;
 460         struct smb_filename *smb_fname_cwd = NULL;
 461         char *saved_dir = NULL;
 462         TALLOC_CTX *ctx = talloc_tos();
 463         NTSTATUS status = NT_STATUS_OK;
 464         int ret;
 465
 466         smb_fname_parent = synthetic_smb_fname(ctx, inherit_from_dir,
 467                                                NULL, NULL);
 468         if (smb_fname_parent == NULL) {
 469                 return NT_STATUS_NO_MEMORY;
 470         }
 471
 472         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 473         if (ret == -1) {
 474                 status = map_nt_error_from_unix(errno);
 475                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 476                          "directory %s. Error was %s\n",
 477                          smb_fname_str_dbg(smb_fname_parent),
 478                          strerror(errno)));
 479                 goto out;
 480         }
 481
 482         /* We've already done an lstat into psbuf, and we know it's a
 483            directory. If we can cd into the directory and the dev/ino
 484            are the same then we can safely chown without races as
 485            we're locking the directory in place by being in it.  This
 486            should work on any UNIX (thanks tridge :-). JRA.
 487         */
 488
 489         saved_dir = vfs_GetWd(ctx,conn);
 490         if (!saved_dir) {
 491                 status = map_nt_error_from_unix(errno);
 492                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 493                          "current working directory. Error was %s\n",
 494                          strerror(errno)));
 495                 goto out;
 496         }
 497
 498         /* Chdir into the new path. */
 499         if (vfs_ChDir(conn, fname) == -1) {
 500                 status = map_nt_error_from_unix(errno);
 501                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 502                          "current working directory to %s. Error "
 503                          "was %s\n", fname, strerror(errno) ));
 504                 goto chdir;
 505         }
 506
 507         smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL);
 508         if (smb_fname_cwd == NULL) {
 509                 status = NT_STATUS_NO_MEMORY;
 510                 goto chdir;
 511         }
 512
 513         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 514         if (ret == -1) {
 515                 status = map_nt_error_from_unix(errno);
 516                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 517                          "directory '.' (%s) Error was %s\n",
 518                          fname, strerror(errno)));
 519                 goto chdir;
 520         }
 521
 522         /* Ensure we're pointing at the same place. */
 523         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 524             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 525                 DEBUG(0,("change_dir_owner_to_parent: "
 526                          "device/inode on directory %s changed. "
 527                          "Refusing to chown !\n", fname ));
 528                 status = NT_STATUS_ACCESS_DENIED;
 529                 goto chdir;
 530         }
 531
 532         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 533                 /* Already this uid - no need to change. */
 534                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 535                         "is already owned by uid %d\n",
 536                         fname,
 537                         (int)smb_fname_cwd->st.st_ex_uid ));
 538                 status = NT_STATUS_OK;
 539                 goto chdir;
 540         }
 541
 542         become_root();
 543         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 544                             (gid_t)-1);
 545         unbecome_root();
 546         if (ret == -1) {
 547                 status = map_nt_error_from_unix(errno);
 548                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 549                           "directory %s to parent directory uid %u. "
 550                           "Error was %s\n", fname,
 551                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 552                           strerror(errno) ));
 553         } else {
 554                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 555                         "directory %s to parent directory uid %u.\n",
 556                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 557                 /* Ensure the uid entry is updated. */
 558                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 559         }
 560
 561  chdir:
 562         vfs_ChDir(conn,saved_dir);
 563  out:
 564         TALLOC_FREE(smb_fname_parent);
 565         TALLOC_FREE(smb_fname_cwd);
 566         return status;
 567 }
 568
 569 /****************************************************************************
 570  Open a file - returning a guaranteed ATOMIC indication of if the
 571  file was created or not.
 572 ****************************************************************************/
 573
 574 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
 575                         files_struct *fsp,
 576                         int flags,
 577                         mode_t mode,
 578                         bool *file_created)
 579 {
 580         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 581         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 582
 583         *file_created = false;
 584
 585         if (!(flags & O_CREAT)) {
 586                 /*
 587                  * We're not creating the file, just pass through.
 588                  */
 589                 return fd_open(conn, fsp, flags, mode);
 590         }
 591
 592         if (flags & O_EXCL) {
 593                 /*
 594                  * Fail if already exists, just pass through.
 595                  */
 596                 status = fd_open(conn, fsp, flags, mode);
 597
 598                 /*
 599                  * Here we've opened with O_CREAT|O_EXCL. If that went
 600                  * NT_STATUS_OK, we *know* we created this file.
 601                  */
 602                 *file_created = NT_STATUS_IS_OK(status);
 603
 604                 return status;
 605         }
 606
 607         /*
 608          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
 609          * To know absolutely if we created the file or not,
 610          * we can never call O_CREAT without O_EXCL. So if
 611          * we think the file existed, try without O_CREAT|O_EXCL.
 612          * If we think the file didn't exist, try with
 613          * O_CREAT|O_EXCL. Keep bouncing between these two
 614          * requests until either the file is created, or
 615          * opened. Either way, we keep going until we get
 616          * a returnable result (error, or open/create).
 617          */
 618
 619         while(1) {
 620                 int curr_flags = flags;
 621
 622                 if (file_existed) {
 623                         /* Just try open, do not create. */
 624                         curr_flags &= ~(O_CREAT);
 625                         status = fd_open(conn, fsp, curr_flags, mode);
 626                         if (NT_STATUS_EQUAL(status,
 627                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 628                                 /*
 629                                  * Someone deleted it in the meantime.
 630                                  * Retry with O_EXCL.
 631                                  */
 632                                 file_existed = false;
 633                                 DEBUG(10,("fd_open_atomic: file %s existed. "
 634                                         "Retry.\n",
 635                                         smb_fname_str_dbg(fsp->fsp_name)));
 636                                         continue;
 637                         }
 638                 } else {
 639                         /* Try create exclusively, fail if it exists. */
 640                         curr_flags |= O_EXCL;
 641                         status = fd_open(conn, fsp, curr_flags, mode);
 642                         if (NT_STATUS_EQUAL(status,
 643                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
 644                                 /*
 645                                  * Someone created it in the meantime.
 646                                  * Retry without O_CREAT.
 647                                  */
 648                                 file_existed = true;
 649                                 DEBUG(10,("fd_open_atomic: file %s "
 650                                         "did not exist. Retry.\n",
 651                                         smb_fname_str_dbg(fsp->fsp_name)));
 652                                 continue;
 653                         }
 654                         if (NT_STATUS_IS_OK(status)) {
 655                                 /*
 656                                  * Here we've opened with O_CREAT|O_EXCL
 657                                  * and got success. We *know* we created
 658                                  * this file.
 659                                  */
 660                                 *file_created = true;
 661                         }
 662                 }
 663                 /* Create is done, or failed. */
 664                 break;
 665         }
 666         return status;
 667 }
 668
 669 /****************************************************************************
 670  Open a file.
 671 ****************************************************************************/
 672
 673 static NTSTATUS open_file(files_struct *fsp,
 674                           connection_struct *conn,
 675                           struct smb_request *req,
 676                           const char *parent_dir,
 677                           int flags,
 678                           mode_t unx_mode,
 679                           uint32 access_mask, /* client requested access mask. */
 680                           uint32 open_access_mask, /* what we're actually using in the open. */
 681                           bool *p_file_created)
 682 {
 683         struct smb_filename *smb_fname = fsp->fsp_name;
 684         NTSTATUS status = NT_STATUS_OK;
 685         int accmode = (flags & O_ACCMODE);
 686         int local_flags = flags;
 687         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 688
 689         fsp->fh->fd = -1;
 690         errno = EPERM;
 691
 692         /* Check permissions */
 693
 694         /*
 695          * This code was changed after seeing a client open request
 696          * containing the open mode of (DENY_WRITE/read-only) with
 697          * the 'create if not exist' bit set. The previous code
 698          * would fail to open the file read only on a read-only share
 699          * as it was checking the flags parameter  directly against O_RDONLY,
 700          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 701          * JRA.
 702          */
 703
 704         if (!CAN_WRITE(conn)) {
 705                 /* It's a read-only share - fail if we wanted to write. */
 706                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 707                         DEBUG(3,("Permission denied opening %s\n",
 708                                  smb_fname_str_dbg(smb_fname)));
 709                         return NT_STATUS_ACCESS_DENIED;
 710                 }
 711                 if (flags & O_CREAT) {
 712                         /* We don't want to write - but we must make sure that
 713                            O_CREAT doesn't create the file if we have write
 714                            access into the directory.
 715                         */
 716                         flags &= ~(O_CREAT|O_EXCL);
 717                         local_flags &= ~(O_CREAT|O_EXCL);
 718                 }
 719         }
 720
 721         /*
 722          * This little piece of insanity is inspired by the
 723          * fact that an NT client can open a file for O_RDONLY,
 724          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 725          * If the client *can* write to the file, then it expects to
 726          * truncate the file, even though it is opening for readonly.
 727          * Quicken uses this stupid trick in backup file creation...
 728          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 729          * for helping track this one down. It didn't bite us in 2.0.x
 730          * as we always opened files read-write in that release. JRA.
 731          */
 732
 733         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 734                 DEBUG(10,("open_file: truncate requested on read-only open "
 735                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 736                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 737         }
 738
 739         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 740             (!file_existed && (local_flags & O_CREAT)) ||
 741             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 742                 const char *wild;
 743                 int ret;
 744
 745 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 746                 /*
 747                  * We would block on opening a FIFO with no one else on the
 748                  * other end. Do what we used to do and add O_NONBLOCK to the
 749                  * open flags. JRA.
 750                  */
 751
 752                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 753                         local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
 754                         local_flags |= O_NONBLOCK;
 755                 }
 756 #endif
 757
 758                 /* Don't create files with Microsoft wildcard characters. */
 759                 if (fsp->base_fsp) {
 760                         /*
 761                          * wildcard characters are allowed in stream names
 762                          * only test the basefilename
 763                          */
 764                         wild = fsp->base_fsp->fsp_name->base_name;
 765                 } else {
 766                         wild = smb_fname->base_name;
 767                 }
 768                 if ((local_flags & O_CREAT) && !file_existed &&
 769                     ms_has_wild(wild))  {
 770                         return NT_STATUS_OBJECT_NAME_INVALID;
 771                 }
 772
 773                 /* Can we access this file ? */
 774                 if (!fsp->base_fsp) {
 775                         /* Only do this check on non-stream open. */
 776                         if (file_existed) {
 777                                 status = smbd_check_access_rights(conn,
 778                                                 smb_fname,
 779                                                 false,
 780                                                 access_mask);
 781                         } else if (local_flags & O_CREAT){
 782                                 status = check_parent_access(conn,
 783                                                 smb_fname,
 784                                                 SEC_DIR_ADD_FILE);
 785                         } else {
 786                                 /* File didn't exist and no O_CREAT. */
 787                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 788                         }
 789                         if (!NT_STATUS_IS_OK(status)) {
 790                                 DEBUG(10,("open_file: "
 791                                         "%s on file "
 792                                         "%s returned %s\n",
 793                                         file_existed ?
 794                                                 "smbd_check_access_rights" :
 795                                                 "check_parent_access",
 796                                         smb_fname_str_dbg(smb_fname),
 797                                         nt_errstr(status) ));
 798                                 return status;
 799                         }
 800                 }
 801
 802                 /* Actually do the open */
 803                 status = fd_open_atomic(conn, fsp, local_flags,
 804                                 unx_mode, p_file_created);
 805                 if (!NT_STATUS_IS_OK(status)) {
 806                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 807                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 808                                  nt_errstr(status),local_flags,flags));
 809                         return status;
 810                 }
 811
 812                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 813                 if (ret == -1) {
 814                         /* If we have an fd, this stat should succeed. */
 815                         DEBUG(0,("Error doing fstat on open file %s "
 816                                 "(%s)\n",
 817                                 smb_fname_str_dbg(smb_fname),
 818                                 strerror(errno) ));
 819                         status = map_nt_error_from_unix(errno);
 820                         fd_close(fsp);
 821                         return status;
 822                 }
 823
 824                 if (*p_file_created) {
 825                         /* We created this file. */
 826
 827                         bool need_re_stat = false;
 828                         /* Do all inheritance work after we've
 829                            done a successful fstat call and filled
 830                            in the stat struct in fsp->fsp_name. */
 831
 832                         /* Inherit the ACL if required */
 833                         if (lp_inherit_perms(SNUM(conn))) {
 834                                 inherit_access_posix_acl(conn, parent_dir,
 835                                                          smb_fname->base_name,
 836                                                          unx_mode);
 837                                 need_re_stat = true;
 838                         }
 839
 840                         /* Change the owner if required. */
 841                         if (lp_inherit_owner(SNUM(conn))) {
 842                                 change_file_owner_to_parent(conn, parent_dir,
 843                                                             fsp);
 844                                 need_re_stat = true;
 845                         }
 846
 847                         if (need_re_stat) {
 848                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 849                                 /* If we have an fd, this stat should succeed. */
 850                                 if (ret == -1) {
 851                                         DEBUG(0,("Error doing fstat on open file %s "
 852                                                  "(%s)\n",
 853                                                  smb_fname_str_dbg(smb_fname),
 854                                                  strerror(errno) ));
 855                                 }
 856                         }
 857
 858                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 859                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 860                                      smb_fname->base_name);
 861                 }
 862         } else {
 863                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 864                 if (!file_existed) {
 865                         /* File must exist for a stat open. */
 866                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 867                 }
 868
 869                 status = smbd_check_access_rights(conn,
 870                                 smb_fname,
 871                                 false,
 872                                 access_mask);
 873
 874                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 875                                 fsp->posix_open &&
 876                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 877                         /* This is a POSIX stat open for delete
 878                          * or rename on a symlink that points
 879                          * nowhere. Allow. */
 880                         DEBUG(10,("open_file: allowing POSIX "
 881                                   "open on bad symlink %s\n",
 882                                   smb_fname_str_dbg(smb_fname)));
 883                         status = NT_STATUS_OK;
 884                 }
 885
 886                 if (!NT_STATUS_IS_OK(status)) {
 887                         DEBUG(10,("open_file: "
 888                                 "smbd_check_access_rights on file "
 889                                 "%s returned %s\n",
 890                                 smb_fname_str_dbg(smb_fname),
 891                                 nt_errstr(status) ));
 892                         return status;
 893                 }
 894         }
 895
 896         /*
 897          * POSIX allows read-only opens of directories. We don't
 898          * want to do this (we use a different code path for this)
 899          * so catch a directory open and return an EISDIR. JRA.
 900          */
 901
 902         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 903                 fd_close(fsp);
 904                 errno = EISDIR;
 905                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 906         }
 907
 908         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 909         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 910         fsp->file_pid = req ? req->smbpid : 0;
 911         fsp->can_lock = True;
 912         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
 913         fsp->can_write =
 914                 CAN_WRITE(conn) &&
 915                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
 916         fsp->print_file = NULL;
 917         fsp->modified = False;
 918         fsp->sent_oplock_break = NO_BREAK_SENT;
 919         fsp->is_directory = False;
 920         if (conn->aio_write_behind_list &&
 921             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 922                        conn->case_sensitive)) {
 923                 fsp->aio_write_behind = True;
 924         }
 925
 926         fsp->wcp = NULL; /* Write cache pointer. */
 927
 928         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 929                  conn->session_info->unix_info->unix_name,
 930                  smb_fname_str_dbg(smb_fname),
 931                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 932                  conn->num_files_open));
 933
 934         errno = 0;
 935         return NT_STATUS_OK;
 936 }
 937
 938 /****************************************************************************
 939  Check if we can open a file with a share mode.
 940  Returns True if conflict, False if not.
 941 ****************************************************************************/
 942
 943 static bool share_conflict(struct share_mode_entry *entry,
 944                            uint32 access_mask,
 945                            uint32 share_access)
 946 {
 947         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 948                   "entry->share_access = 0x%x, "
 949                   "entry->private_options = 0x%x\n",
 950                   (unsigned int)entry->access_mask,
 951                   (unsigned int)entry->share_access,
 952                   (unsigned int)entry->private_options));
 953
 954         if (server_id_is_disconnected(&entry->pid)) {
 955                 /*
 956                  * note: cleanup should have been done by
 957                  * delay_for_batch_oplocks()
 958                  */
 959                 return false;
 960         }
 961
 962         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 963                   (unsigned int)access_mask, (unsigned int)share_access));
 964
 965         if ((entry->access_mask & (FILE_WRITE_DATA|
 966                                    FILE_APPEND_DATA|
 967                                    FILE_READ_DATA|
 968                                    FILE_EXECUTE|
 969                                    DELETE_ACCESS)) == 0) {
 970                 DEBUG(10,("share_conflict: No conflict due to "
 971                           "entry->access_mask = 0x%x\n",
 972                           (unsigned int)entry->access_mask ));
 973                 return False;
 974         }
 975
 976         if ((access_mask & (FILE_WRITE_DATA|
 977                             FILE_APPEND_DATA|
 978                             FILE_READ_DATA|
 979                             FILE_EXECUTE|
 980                             DELETE_ACCESS)) == 0) {
 981                 DEBUG(10,("share_conflict: No conflict due to "
 982                           "access_mask = 0x%x\n",
 983                           (unsigned int)access_mask ));
 984                 return False;
 985         }
 986
 987 #if 1 /* JRA TEST - Superdebug. */
 988 #define CHECK_MASK(num, am, right, sa, share) \
 989         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 990                 (unsigned int)(num), (unsigned int)(am), \
 991                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 992         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 993                 (unsigned int)(num), (unsigned int)(sa), \
 994                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 995         if (((am) & (right)) && !((sa) & (share))) { \
 996                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 997 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 998                         (unsigned int)(share) )); \
 999                 return True; \
1000         }
1001 #else
1002 #define CHECK_MASK(num, am, right, sa, share) \
1003         if (((am) & (right)) && !((sa) & (share))) { \
1004                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1005 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1006                         (unsigned int)(share) )); \
1007                 return True; \
1008         }
1009 #endif
1010
1011         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1012                    share_access, FILE_SHARE_WRITE);
1013         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1014                    entry->share_access, FILE_SHARE_WRITE);
1015
1016         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1017                    share_access, FILE_SHARE_READ);
1018         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1019                    entry->share_access, FILE_SHARE_READ);
1020
1021         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1022                    share_access, FILE_SHARE_DELETE);
1023         CHECK_MASK(6, access_mask, DELETE_ACCESS,
1024                    entry->share_access, FILE_SHARE_DELETE);
1025
1026         DEBUG(10,("share_conflict: No conflict.\n"));
1027         return False;
1028 }
1029
1030 #if defined(DEVELOPER)
1031 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1032                                       int num,
1033                                       struct share_mode_entry *share_entry)
1034 {
1035         struct server_id self = messaging_server_id(sconn->msg_ctx);
1036         files_struct *fsp;
1037
1038         if (!serverid_equal(&self, &share_entry->pid)) {
1039                 return;
1040         }
1041
1042         if (!is_valid_share_mode_entry(share_entry)) {
1043                 return;
1044         }
1045
1046         fsp = file_find_dif(sconn, share_entry->id,
1047                             share_entry->share_file_id);
1048         if (!fsp) {
1049                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1050                          share_mode_str(talloc_tos(), num, share_entry) ));
1051                 smb_panic("validate_my_share_entries: Cannot match a "
1052                           "share entry with an open file\n");
1053         }
1054
1055         if ((share_entry->op_type == NO_OPLOCK) &&
1056             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK))
1057         {
1058                 /* Someone has already written to it, but I haven't yet
1059                  * noticed */
1060                 return;
1061         }
1062
1063         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1064                 goto panic;
1065         }
1066
1067         return;
1068
1069  panic:
1070         {
1071                 char *str;
1072                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1073                          share_mode_str(talloc_tos(), num, share_entry) ));
1074                 str = talloc_asprintf(talloc_tos(),
1075                         "validate_my_share_entries: "
1076                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1077                          fsp->fsp_name->base_name,
1078                          (unsigned int)fsp->oplock_type,
1079                          (unsigned int)share_entry->op_type );
1080                 smb_panic(str);
1081         }
1082 }
1083 #endif
1084
1085 bool is_stat_open(uint32 access_mask)
1086 {
1087         const uint32_t stat_open_bits =
1088                 (SYNCHRONIZE_ACCESS|
1089                  FILE_READ_ATTRIBUTES|
1090                  FILE_WRITE_ATTRIBUTES);
1091
1092         return (((access_mask &  stat_open_bits) != 0) &&
1093                 ((access_mask & ~stat_open_bits) == 0));
1094 }
1095
1096 /****************************************************************************
1097  Deal with share modes
1098  Invarient: Share mode must be locked on entry and exit.
1099  Returns -1 on error, or number of share modes on success (may be zero).
1100 ****************************************************************************/
1101
1102 static NTSTATUS open_mode_check(connection_struct *conn,
1103                                 struct share_mode_lock *lck,
1104                                 uint32_t name_hash,
1105                                 uint32 access_mask,
1106                                 uint32 share_access,
1107                                 uint32 create_options,
1108                                 bool *file_existed)
1109 {
1110         int i;
1111
1112         if(lck->data->num_share_modes == 0) {
1113                 return NT_STATUS_OK;
1114         }
1115
1116         /* A delete on close prohibits everything */
1117
1118         if (is_delete_on_close_set(lck, name_hash)) {
1119                 /*
1120                  * Check the delete on close token
1121                  * is valid. It could have been left
1122                  * after a server crash.
1123                  */
1124                 for(i = 0; i < lck->data->num_share_modes; i++) {
1125                         if (!share_mode_stale_pid(lck->data, i)) {
1126
1127                                 *file_existed = true;
1128
1129                                 return NT_STATUS_DELETE_PENDING;
1130                         }
1131                 }
1132                 return NT_STATUS_OK;
1133         }
1134
1135         if (is_stat_open(access_mask)) {
1136                 /* Stat open that doesn't trigger oplock breaks or share mode
1137                  * checks... ! JRA. */
1138                 return NT_STATUS_OK;
1139         }
1140
1141         /*
1142          * Check if the share modes will give us access.
1143          */
1144
1145 #if defined(DEVELOPER)
1146         for(i = 0; i < lck->data->num_share_modes; i++) {
1147                 validate_my_share_entries(conn->sconn, i,
1148                                           &lck->data->share_modes[i]);
1149         }
1150 #endif
1151
1152         /* Now we check the share modes, after any oplock breaks. */
1153         for(i = 0; i < lck->data->num_share_modes; i++) {
1154
1155                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1156                         continue;
1157                 }
1158
1159                 /* someone else has a share lock on it, check to see if we can
1160                  * too */
1161                 if (share_conflict(&lck->data->share_modes[i],
1162                                    access_mask, share_access)) {
1163
1164                         if (share_mode_stale_pid(lck->data, i)) {
1165                                 continue;
1166                         }
1167
1168                         *file_existed = true;
1169
1170                         return NT_STATUS_SHARING_VIOLATION;
1171                 }
1172         }
1173
1174         if (lck->data->num_share_modes != 0) {
1175                 *file_existed = true;
1176         }
1177
1178         return NT_STATUS_OK;
1179 }
1180
1181 /*
1182  * Send a break message to the oplock holder and delay the open for
1183  * our client.
1184  */
1185
1186 static NTSTATUS send_break_message(files_struct *fsp,
1187                                         struct share_mode_entry *exclusive,
1188                                         uint64_t mid,
1189                                         int oplock_request)
1190 {
1191         NTSTATUS status;
1192         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1193
1194         DEBUG(10, ("Sending break request to PID %s\n",
1195                    procid_str_static(&exclusive->pid)));
1196         exclusive->op_mid = mid;
1197
1198         /* Create the message. */
1199         share_mode_entry_to_message(msg, exclusive);
1200
1201         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1202                                     MSG_SMB_BREAK_REQUEST,
1203                                     (uint8 *)msg, sizeof(msg));
1204         if (!NT_STATUS_IS_OK(status)) {
1205                 DEBUG(3, ("Could not send oplock break message: %s\n",
1206                           nt_errstr(status)));
1207         }
1208
1209         return status;
1210 }
1211
1212 /*
1213  * Return share_mode_entry pointers for :
1214  * 1). Batch oplock entry.
1215  * 2). Batch or exclusive oplock entry (may be identical to #1).
1216  * bool have_level2_oplock
1217  * bool have_no_oplock.
1218  * Do internal consistency checks on the share mode for a file.
1219  */
1220
1221 static void find_oplock_types(files_struct *fsp,
1222                                 int oplock_request,
1223                                 const struct share_mode_lock *lck,
1224                                 struct share_mode_entry **pp_batch,
1225                                 struct share_mode_entry **pp_ex_or_batch,
1226                                 bool *got_level2,
1227                                 bool *got_no_oplock)
1228 {
1229         int i;
1230
1231         *pp_batch = NULL;
1232         *pp_ex_or_batch = NULL;
1233         *got_level2 = false;
1234         *got_no_oplock = false;
1235
1236         /* Ignore stat or internal opens, as is done in
1237                 delay_for_batch_oplocks() and
1238                 delay_for_exclusive_oplocks().
1239          */
1240         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1241                 return;
1242         }
1243
1244         for (i=0; i<lck->data->num_share_modes; i++) {
1245                 struct share_mode_entry *e = &lck->data->share_modes[i];
1246
1247                 if (!is_valid_share_mode_entry(e)) {
1248                         continue;
1249                 }
1250
1251                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1252                         /* We ignore stat opens in the table - they
1253                            always have NO_OPLOCK and never get or
1254                            cause breaks. JRA. */
1255                         continue;
1256                 }
1257
1258                 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1259                         /* batch - can only be one. */
1260                         if (share_mode_stale_pid(lck->data, i)) {
1261                                 DEBUG(10, ("Found stale batch oplock\n"));
1262                                 continue;
1263                         }
1264                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1265                                 smb_panic("Bad batch oplock entry.");
1266                         }
1267                         *pp_batch = e;
1268                 }
1269
1270                 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1271                         if (share_mode_stale_pid(lck->data, i)) {
1272                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1273                                 continue;
1274                         }
1275                         /* Exclusive or batch - can only be one. */
1276                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1277                                 smb_panic("Bad exclusive or batch oplock entry.");
1278                         }
1279                         *pp_ex_or_batch = e;
1280                 }
1281
1282                 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1283                         if (*pp_batch || *pp_ex_or_batch) {
1284                                 if (share_mode_stale_pid(lck->data, i)) {
1285                                         DEBUG(10, ("Found stale LevelII "
1286                                                    "oplock\n"));
1287                                         continue;
1288                                 }
1289                                 smb_panic("Bad levelII oplock entry.");
1290                         }
1291                         *got_level2 = true;
1292                 }
1293
1294                 if (e->op_type == NO_OPLOCK) {
1295                         if (*pp_batch || *pp_ex_or_batch) {
1296                                 if (share_mode_stale_pid(lck->data, i)) {
1297                                         DEBUG(10, ("Found stale NO_OPLOCK "
1298                                                    "entry\n"));
1299                                         continue;
1300                                 }
1301                                 smb_panic("Bad no oplock entry.");
1302                         }
1303                         *got_no_oplock = true;
1304                 }
1305         }
1306 }
1307
1308 static bool delay_for_batch_oplocks(files_struct *fsp,
1309                                         uint64_t mid,
1310                                         int oplock_request,
1311                                         struct share_mode_entry *batch_entry)
1312 {
1313         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1314                 return false;
1315         }
1316         if (batch_entry == NULL) {
1317                 return false;
1318         }
1319
1320         if (server_id_is_disconnected(&batch_entry->pid)) {
1321                 /*
1322                  * TODO: clean up.
1323                  * This could be achieved by sending a break message
1324                  * to ourselves. Special considerations for files
1325                  * with delete_on_close flag set!
1326                  *
1327                  * For now we keep it simple and do not
1328                  * allow delete on close for durable handles.
1329                  */
1330                 return false;
1331         }
1332
1333         /* Found a batch oplock */
1334         send_break_message(fsp, batch_entry, mid, oplock_request);
1335         return true;
1336 }
1337
1338 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1339                                         uint64_t mid,
1340                                         int oplock_request,
1341                                         struct share_mode_entry *ex_entry)
1342 {
1343         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1344                 return false;
1345         }
1346         if (ex_entry == NULL) {
1347                 return false;
1348         }
1349
1350         if (server_id_is_disconnected(&ex_entry->pid)) {
1351                 /*
1352                  * since only durable handles can get disconnected,
1353                  * and we can only get durable handles with batch oplocks,
1354                  * this should actually never be reached...
1355                  */
1356                 return false;
1357         }
1358
1359         send_break_message(fsp, ex_entry, mid, oplock_request);
1360         return true;
1361 }
1362
1363 static bool file_has_brlocks(files_struct *fsp)
1364 {
1365         struct byte_range_lock *br_lck;
1366
1367         br_lck = brl_get_locks_readonly(fsp);
1368         if (!br_lck)
1369                 return false;
1370
1371         return (brl_num_locks(br_lck) > 0);
1372 }
1373
1374 static void grant_fsp_oplock_type(files_struct *fsp,
1375                                 int oplock_request,
1376                                 bool got_level2_oplock,
1377                                 bool got_a_none_oplock)
1378 {
1379         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1380                             lp_level2_oplocks(SNUM(fsp->conn));
1381
1382         /* Start by granting what the client asked for,
1383            but ensure no SAMBA_PRIVATE bits can be set. */
1384         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1385
1386         if (oplock_request & INTERNAL_OPEN_ONLY) {
1387                 /* No oplocks on internal open. */
1388                 fsp->oplock_type = NO_OPLOCK;
1389                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1390                         fsp->oplock_type, fsp_str_dbg(fsp)));
1391                 return;
1392         }
1393
1394         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1395                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1396                         fsp_str_dbg(fsp)));
1397                 fsp->oplock_type = NO_OPLOCK;
1398         }
1399
1400         if (is_stat_open(fsp->access_mask)) {
1401                 /* Leave the value already set. */
1402                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1403                         fsp->oplock_type, fsp_str_dbg(fsp)));
1404                 return;
1405         }
1406
1407         /*
1408          * Match what was requested (fsp->oplock_type) with
1409          * what was found in the existing share modes.
1410          */
1411
1412         if (got_a_none_oplock) {
1413                 fsp->oplock_type = NO_OPLOCK;
1414         } else if (got_level2_oplock) {
1415                 if (fsp->oplock_type == NO_OPLOCK ||
1416                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1417                         /* Store a level2 oplock, but don't tell the client */
1418                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1419                 } else {
1420                         fsp->oplock_type = LEVEL_II_OPLOCK;
1421                 }
1422         } else {
1423                 /* All share_mode_entries are placeholders or deferred.
1424                  * Silently upgrade to fake levelII if the client didn't
1425                  * ask for an oplock. */
1426                 if (fsp->oplock_type == NO_OPLOCK) {
1427                         /* Store a level2 oplock, but don't tell the client */
1428                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1429                 }
1430         }
1431
1432         /*
1433          * Don't grant level2 to clients that don't want them
1434          * or if we've turned them off.
1435          */
1436         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1437                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1438         }
1439
1440         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1441                   fsp->oplock_type, fsp_str_dbg(fsp)));
1442 }
1443
1444 static bool request_timed_out(struct timeval request_time,
1445                               struct timeval timeout)
1446 {
1447         struct timeval now, end_time;
1448         GetTimeOfDay(&now);
1449         end_time = timeval_sum(&request_time, &timeout);
1450         return (timeval_compare(&end_time, &now) < 0);
1451 }
1452
1453 struct defer_open_state {
1454         struct smbd_server_connection *sconn;
1455         uint64_t mid;
1456 };
1457
1458 static void defer_open_done(struct tevent_req *req);
1459
1460 /****************************************************************************
1461  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1462 ****************************************************************************/
1463
1464 static void defer_open(struct share_mode_lock *lck,
1465                        struct timeval request_time,
1466                        struct timeval timeout,
1467                        struct smb_request *req,
1468                        struct deferred_open_record *state)
1469 {
1470         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1471                   "open entry for mid %llu\n",
1472                   (unsigned int)request_time.tv_sec,
1473                   (unsigned int)request_time.tv_usec,
1474                   (unsigned long long)req->mid));
1475
1476         if (!push_deferred_open_message_smb(req, request_time, timeout,
1477                                        state->id, (char *)state, sizeof(*state))) {
1478                 TALLOC_FREE(lck);
1479                 exit_server("push_deferred_open_message_smb failed");
1480         }
1481         if (lck) {
1482                 struct defer_open_state *watch_state;
1483                 struct tevent_req *watch_req;
1484                 bool ret;
1485
1486                 watch_state = talloc(req->sconn, struct defer_open_state);
1487                 if (watch_state == NULL) {
1488                         exit_server("talloc failed");
1489                 }
1490                 watch_state->sconn = req->sconn;
1491                 watch_state->mid = req->mid;
1492
1493                 DEBUG(10, ("defering mid %llu\n",
1494                            (unsigned long long)req->mid));
1495
1496                 watch_req = dbwrap_record_watch_send(
1497                         watch_state, req->sconn->ev_ctx, lck->data->record,
1498                         req->sconn->msg_ctx);
1499                 if (watch_req == NULL) {
1500                         exit_server("Could not watch share mode record");
1501                 }
1502                 tevent_req_set_callback(watch_req, defer_open_done,
1503                                         watch_state);
1504
1505                 ret = tevent_req_set_endtime(
1506                         watch_req, req->sconn->ev_ctx,
1507                         timeval_sum(&request_time, &timeout));
1508                 SMB_ASSERT(ret);
1509         }
1510 }
1511
1512 static void defer_open_done(struct tevent_req *req)
1513 {
1514         struct defer_open_state *state = tevent_req_callback_data(
1515                 req, struct defer_open_state);
1516         NTSTATUS status;
1517         bool ret;
1518
1519         status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1520         TALLOC_FREE(req);
1521         if (!NT_STATUS_IS_OK(status)) {
1522                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1523                           nt_errstr(status)));
1524                 /*
1525                  * Even if it failed, retry anyway. TODO: We need a way to
1526                  * tell a re-scheduled open about that error.
1527                  */
1528         }
1529
1530         DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1531
1532         ret = schedule_deferred_open_message_smb(state->sconn, state->mid);
1533         SMB_ASSERT(ret);
1534         TALLOC_FREE(state);
1535 }
1536
1537
1538 /****************************************************************************
1539  On overwrite open ensure that the attributes match.
1540 ****************************************************************************/
1541
1542 static bool open_match_attributes(connection_struct *conn,
1543                                   uint32 old_dos_attr,
1544                                   uint32 new_dos_attr,
1545                                   mode_t existing_unx_mode,
1546                                   mode_t new_unx_mode,
1547                                   mode_t *returned_unx_mode)
1548 {
1549         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1550
1551         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1552         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1553
1554         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1555            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1556                 *returned_unx_mode = new_unx_mode;
1557         } else {
1558                 *returned_unx_mode = (mode_t)0;
1559         }
1560
1561         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1562                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1563                   "returned_unx_mode = 0%o\n",
1564                   (unsigned int)old_dos_attr,
1565                   (unsigned int)existing_unx_mode,
1566                   (unsigned int)new_dos_attr,
1567                   (unsigned int)*returned_unx_mode ));
1568
1569         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1570         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1571                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1572                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1573                         return False;
1574                 }
1575         }
1576         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1577                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1578                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1579                         return False;
1580                 }
1581         }
1582         return True;
1583 }
1584
1585 /****************************************************************************
1586  Special FCB or DOS processing in the case of a sharing violation.
1587  Try and find a duplicated file handle.
1588 ****************************************************************************/
1589
1590 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1591                                 connection_struct *conn,
1592                                 files_struct *fsp_to_dup_into,
1593                                 const struct smb_filename *smb_fname,
1594                                 struct file_id id,
1595                                 uint16 file_pid,
1596                                 uint64_t vuid,
1597                                 uint32 access_mask,
1598                                 uint32 share_access,
1599                                 uint32 create_options)
1600 {
1601         files_struct *fsp;
1602
1603         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1604                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1605
1606         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1607             fsp = file_find_di_next(fsp)) {
1608
1609                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1610                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1611                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1612                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1613                           (unsigned int)fsp->file_pid,
1614                           (unsigned int)fsp->fh->private_options,
1615                           (unsigned int)fsp->access_mask ));
1616
1617                 if (fsp != fsp_to_dup_into &&
1618                     fsp->fh->fd != -1 &&
1619                     fsp->vuid == vuid &&
1620                     fsp->file_pid == file_pid &&
1621                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1622                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1623                     (fsp->access_mask & FILE_WRITE_DATA) &&
1624                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1625                     strequal(fsp->fsp_name->stream_name,
1626                              smb_fname->stream_name)) {
1627                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1628                         break;
1629                 }
1630         }
1631
1632         if (!fsp) {
1633                 return NT_STATUS_NOT_FOUND;
1634         }
1635
1636         /* quite an insane set of semantics ... */
1637         if (is_executable(smb_fname->base_name) &&
1638             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1639                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1640                 return NT_STATUS_INVALID_PARAMETER;
1641         }
1642
1643         /* We need to duplicate this fsp. */
1644         return dup_file_fsp(req, fsp, access_mask, share_access,
1645                             create_options, fsp_to_dup_into);
1646 }
1647
1648 static void schedule_defer_open(struct share_mode_lock *lck,
1649                                 struct timeval request_time,
1650                                 struct smb_request *req)
1651 {
1652         struct deferred_open_record state;
1653
1654         /* This is a relative time, added to the absolute
1655            request_time value to get the absolute timeout time.
1656            Note that if this is the second or greater time we enter
1657            this codepath for this particular request mid then
1658            request_time is left as the absolute time of the *first*
1659            time this request mid was processed. This is what allows
1660            the request to eventually time out. */
1661
1662         struct timeval timeout;
1663
1664         /* Normally the smbd we asked should respond within
1665          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1666          * the client did, give twice the timeout as a safety
1667          * measure here in case the other smbd is stuck
1668          * somewhere else. */
1669
1670         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1671
1672         /* Nothing actually uses state.delayed_for_oplocks
1673            but it's handy to differentiate in debug messages
1674            between a 30 second delay due to oplock break, and
1675            a 1 second delay for share mode conflicts. */
1676
1677         state.delayed_for_oplocks = True;
1678         state.async_open = false;
1679         state.id = lck->data->id;
1680
1681         if (!request_timed_out(request_time, timeout)) {
1682                 defer_open(lck, request_time, timeout, req, &state);
1683         }
1684 }
1685
1686 /****************************************************************************
1687  Reschedule an open call that went asynchronous.
1688 ****************************************************************************/
1689
1690 static void schedule_async_open(struct timeval request_time,
1691                                 struct smb_request *req)
1692 {
1693         struct deferred_open_record state;
1694         struct timeval timeout;
1695
1696         timeout = timeval_set(20, 0);
1697
1698         ZERO_STRUCT(state);
1699         state.delayed_for_oplocks = false;
1700         state.async_open = true;
1701
1702         if (!request_timed_out(request_time, timeout)) {
1703                 defer_open(NULL, request_time, timeout, req, &state);
1704         }
1705 }
1706
1707 /****************************************************************************
1708  Work out what access_mask to use from what the client sent us.
1709 ****************************************************************************/
1710
1711 static NTSTATUS smbd_calculate_maximum_allowed_access(
1712         connection_struct *conn,
1713         const struct smb_filename *smb_fname,
1714         bool use_privs,
1715         uint32_t *p_access_mask)
1716 {
1717         struct security_descriptor *sd;
1718         uint32_t access_granted;
1719         NTSTATUS status;
1720
1721         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1722                 *p_access_mask |= FILE_GENERIC_ALL;
1723                 return NT_STATUS_OK;
1724         }
1725
1726         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1727                                     (SECINFO_OWNER |
1728                                      SECINFO_GROUP |
1729                                      SECINFO_DACL),
1730                                     talloc_tos(), &sd);
1731
1732         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1733                 /*
1734                  * File did not exist
1735                  */
1736                 *p_access_mask = FILE_GENERIC_ALL;
1737                 return NT_STATUS_OK;
1738         }
1739         if (!NT_STATUS_IS_OK(status)) {
1740                 DEBUG(10,("Could not get acl on file %s: %s\n",
1741                           smb_fname_str_dbg(smb_fname),
1742                           nt_errstr(status)));
1743                 return NT_STATUS_ACCESS_DENIED;
1744         }
1745
1746         /*
1747          * If we can access the path to this file, by
1748          * default we have FILE_READ_ATTRIBUTES from the
1749          * containing directory. See the section:
1750          * "Algorithm to Check Access to an Existing File"
1751          * in MS-FSA.pdf.
1752          *
1753          * se_file_access_check()
1754          * also takes care of owner WRITE_DAC and READ_CONTROL.
1755          */
1756         status = se_file_access_check(sd,
1757                                  get_current_nttok(conn),
1758                                  use_privs,
1759                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1760                                  &access_granted);
1761
1762         TALLOC_FREE(sd);
1763
1764         if (!NT_STATUS_IS_OK(status)) {
1765                 DEBUG(10, ("Access denied on file %s: "
1766                            "when calculating maximum access\n",
1767                            smb_fname_str_dbg(smb_fname)));
1768                 return NT_STATUS_ACCESS_DENIED;
1769         }
1770         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1771
1772         if (!(access_granted & DELETE_ACCESS)) {
1773                 if (can_delete_file_in_directory(conn, smb_fname)) {
1774                         *p_access_mask |= DELETE_ACCESS;
1775                 }
1776         }
1777
1778         return NT_STATUS_OK;
1779 }
1780
1781 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1782                                     const struct smb_filename *smb_fname,
1783                                     bool use_privs,
1784                                     uint32_t access_mask,
1785                                     uint32_t *access_mask_out)
1786 {
1787         NTSTATUS status;
1788         uint32_t orig_access_mask = access_mask;
1789         uint32_t rejected_share_access;
1790
1791         /*
1792          * Convert GENERIC bits to specific bits.
1793          */
1794
1795         se_map_generic(&access_mask, &file_generic_mapping);
1796
1797         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1798         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1799
1800                 status = smbd_calculate_maximum_allowed_access(
1801                         conn, smb_fname, use_privs, &access_mask);
1802
1803                 if (!NT_STATUS_IS_OK(status)) {
1804                         return status;
1805                 }
1806
1807                 access_mask &= conn->share_access;
1808         }
1809
1810         rejected_share_access = access_mask & ~(conn->share_access);
1811
1812         if (rejected_share_access) {
1813                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1814                         "file %s: rejected by share access mask[0x%08X] "
1815                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1816                         smb_fname_str_dbg(smb_fname),
1817                         conn->share_access,
1818                         orig_access_mask, access_mask,
1819                         rejected_share_access));
1820                 return NT_STATUS_ACCESS_DENIED;
1821         }
1822
1823         *access_mask_out = access_mask;
1824         return NT_STATUS_OK;
1825 }
1826
1827 /****************************************************************************
1828  Remove the deferred open entry under lock.
1829 ****************************************************************************/
1830
1831 /****************************************************************************
1832  Return true if this is a state pointer to an asynchronous create.
1833 ****************************************************************************/
1834
1835 bool is_deferred_open_async(const void *ptr)
1836 {
1837         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1838
1839         return state->async_open;
1840 }
1841
1842 static bool clear_ads(uint32_t create_disposition)
1843 {
1844         bool ret = false;
1845
1846         switch (create_disposition) {
1847         case FILE_SUPERSEDE:
1848         case FILE_OVERWRITE_IF:
1849         case FILE_OVERWRITE:
1850                 ret = true;
1851                 break;
1852         default:
1853                 break;
1854         }
1855         return ret;
1856 }
1857
1858 static int disposition_to_open_flags(uint32_t create_disposition)
1859 {
1860         int ret = 0;
1861
1862         /*
1863          * Currently we're using FILE_SUPERSEDE as the same as
1864          * FILE_OVERWRITE_IF but they really are
1865          * different. FILE_SUPERSEDE deletes an existing file
1866          * (requiring delete access) then recreates it.
1867          */
1868
1869         switch (create_disposition) {
1870         case FILE_SUPERSEDE:
1871         case FILE_OVERWRITE_IF:
1872                 /*
1873                  * If file exists replace/overwrite. If file doesn't
1874                  * exist create.
1875                  */
1876                 ret = O_CREAT|O_TRUNC;
1877                 break;
1878
1879         case FILE_OPEN:
1880                 /*
1881                  * If file exists open. If file doesn't exist error.
1882                  */
1883                 ret = 0;
1884                 break;
1885
1886         case FILE_OVERWRITE:
1887                 /*
1888                  * If file exists overwrite. If file doesn't exist
1889                  * error.
1890                  */
1891                 ret = O_TRUNC;
1892                 break;
1893
1894         case FILE_CREATE:
1895                 /*
1896                  * If file exists error. If file doesn't exist create.
1897                  */
1898                 ret = O_CREAT|O_EXCL;
1899                 break;
1900
1901         case FILE_OPEN_IF:
1902                 /*
1903                  * If file exists open. If file doesn't exist create.
1904                  */
1905                 ret = O_CREAT;
1906                 break;
1907         }
1908         return ret;
1909 }
1910
1911 static int calculate_open_access_flags(uint32_t access_mask,
1912                                        int oplock_request,
1913                                        uint32_t private_flags)
1914 {
1915         bool need_write, need_read;
1916
1917         /*
1918          * Note that we ignore the append flag as append does not
1919          * mean the same thing under DOS and Unix.
1920          */
1921
1922         need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
1923         if (!need_write) {
1924                 return O_RDONLY;
1925         }
1926
1927         /* DENY_DOS opens are always underlying read-write on the
1928            file handle, no matter what the requested access mask
1929            says. */
1930
1931         need_read =
1932                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1933                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1934                                 FILE_READ_EA|FILE_EXECUTE));
1935
1936         if (!need_read) {
1937                 return O_WRONLY;
1938         }
1939         return O_RDWR;
1940 }
1941
1942 /****************************************************************************
1943  Open a file with a share mode. Passed in an already created files_struct *.
1944 ****************************************************************************/
1945
1946 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1947                             struct smb_request *req,
1948                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1949                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1950                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1951                             uint32 create_options,      /* options such as delete on close. */
1952                             uint32 new_dos_attributes,  /* attributes used for new file. */
1953                             int oplock_request,         /* internal Samba oplock codes. */
1954                                                         /* Information (FILE_EXISTS etc.) */
1955                             uint32_t private_flags,     /* Samba specific flags. */
1956                             int *pinfo,
1957                             files_struct *fsp)
1958 {
1959         struct smb_filename *smb_fname = fsp->fsp_name;
1960         int flags=0;
1961         int flags2=0;
1962         bool file_existed = VALID_STAT(smb_fname->st);
1963         bool def_acl = False;
1964         bool posix_open = False;
1965         bool new_file_created = False;
1966         bool first_open_attempt = true;
1967         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1968         mode_t new_unx_mode = (mode_t)0;
1969         mode_t unx_mode = (mode_t)0;
1970         int info;
1971         uint32 existing_dos_attributes = 0;
1972         struct timeval request_time = timeval_zero();
1973         struct share_mode_lock *lck = NULL;
1974         uint32 open_access_mask = access_mask;
1975         NTSTATUS status;
1976         char *parent_dir;
1977         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1978         struct share_mode_entry *batch_entry = NULL;
1979         struct share_mode_entry *exclusive_entry = NULL;
1980         bool got_level2_oplock = false;
1981         bool got_a_none_oplock = false;
1982         struct timespec old_write_time;
1983         struct file_id id;
1984
1985         if (conn->printer) {
1986                 /*
1987                  * Printers are handled completely differently.
1988                  * Most of the passed parameters are ignored.
1989                  */
1990
1991                 if (pinfo) {
1992                         *pinfo = FILE_WAS_CREATED;
1993                 }
1994
1995                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1996                            smb_fname_str_dbg(smb_fname)));
1997
1998                 if (!req) {
1999                         DEBUG(0,("open_file_ntcreate: printer open without "
2000                                 "an SMB request!\n"));
2001                         return NT_STATUS_INTERNAL_ERROR;
2002                 }
2003
2004                 return print_spool_open(fsp, smb_fname->base_name,
2005                                         req->vuid);
2006         }
2007
2008         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2009                             NULL)) {
2010                 return NT_STATUS_NO_MEMORY;
2011         }
2012
2013         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2014                 posix_open = True;
2015                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2016                 new_dos_attributes = 0;
2017         } else {
2018                 /* Windows allows a new file to be created and
2019                    silently removes a FILE_ATTRIBUTE_DIRECTORY
2020                    sent by the client. Do the same. */
2021
2022                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2023
2024                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2025                  * created new. */
2026                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2027                                      smb_fname, parent_dir);
2028         }
2029
2030         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2031                    "access_mask=0x%x share_access=0x%x "
2032                    "create_disposition = 0x%x create_options=0x%x "
2033                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2034                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2035                    access_mask, share_access, create_disposition,
2036                    create_options, (unsigned int)unx_mode, oplock_request,
2037                    (unsigned int)private_flags));
2038
2039         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2040                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2041                 return NT_STATUS_INTERNAL_ERROR;
2042         }
2043
2044         /*
2045          * Only non-internal opens can be deferred at all
2046          */
2047
2048         if (req) {
2049                 void *ptr;
2050                 if (get_deferred_open_message_state(req,
2051                                 &request_time,
2052                                 &ptr)) {
2053                         /* Remember the absolute time of the original
2054                            request with this mid. We'll use it later to
2055                            see if this has timed out. */
2056
2057                         /* If it was an async create retry, the file
2058                            didn't exist. */
2059
2060                         if (is_deferred_open_async(ptr)) {
2061                                 SET_STAT_INVALID(smb_fname->st);
2062                                 file_existed = false;
2063                         }
2064
2065                         /* Ensure we don't reprocess this message. */
2066                         remove_deferred_open_message_smb(req->sconn, req->mid);
2067
2068                         first_open_attempt = false;
2069                 }
2070         }
2071
2072         if (!posix_open) {
2073                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2074                 if (file_existed) {
2075                         existing_dos_attributes = dos_mode(conn, smb_fname);
2076                 }
2077         }
2078
2079         /* ignore any oplock requests if oplocks are disabled */
2080         if (!lp_oplocks(SNUM(conn)) ||
2081             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2082                 /* Mask off everything except the private Samba bits. */
2083                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2084         }
2085
2086         /* this is for OS/2 long file names - say we don't support them */
2087         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2088                 /* OS/2 Workplace shell fix may be main code stream in a later
2089                  * release. */
2090                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2091                          "supported.\n"));
2092                 if (use_nt_status()) {
2093                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2094                 }
2095                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2096         }
2097
2098         switch( create_disposition ) {
2099                 case FILE_OPEN:
2100                         /* If file exists open. If file doesn't exist error. */
2101                         if (!file_existed) {
2102                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2103                                          "requested for file %s and file "
2104                                          "doesn't exist.\n",
2105                                          smb_fname_str_dbg(smb_fname)));
2106                                 errno = ENOENT;
2107                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2108                         }
2109                         break;
2110
2111                 case FILE_OVERWRITE:
2112                         /* If file exists overwrite. If file doesn't exist
2113                          * error. */
2114                         if (!file_existed) {
2115                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2116                                          "requested for file %s and file "
2117                                          "doesn't exist.\n",
2118                                          smb_fname_str_dbg(smb_fname) ));
2119                                 errno = ENOENT;
2120                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2121                         }
2122                         break;
2123
2124                 case FILE_CREATE:
2125                         /* If file exists error. If file doesn't exist
2126                          * create. */
2127                         if (file_existed) {
2128                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2129                                          "requested for file %s and file "
2130                                          "already exists.\n",
2131                                          smb_fname_str_dbg(smb_fname)));
2132                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2133                                         errno = EISDIR;
2134                                 } else {
2135                                         errno = EEXIST;
2136                                 }
2137                                 return map_nt_error_from_unix(errno);
2138                         }
2139                         break;
2140
2141                 case FILE_SUPERSEDE:
2142                 case FILE_OVERWRITE_IF:
2143                 case FILE_OPEN_IF:
2144                         break;
2145                 default:
2146                         return NT_STATUS_INVALID_PARAMETER;
2147         }
2148
2149         flags2 = disposition_to_open_flags(create_disposition);
2150
2151         /* We only care about matching attributes on file exists and
2152          * overwrite. */
2153
2154         if (!posix_open && file_existed &&
2155             ((create_disposition == FILE_OVERWRITE) ||
2156              (create_disposition == FILE_OVERWRITE_IF))) {
2157                 if (!open_match_attributes(conn, existing_dos_attributes,
2158                                            new_dos_attributes,
2159                                            smb_fname->st.st_ex_mode,
2160                                            unx_mode, &new_unx_mode)) {
2161                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2162                                  "for file %s (%x %x) (0%o, 0%o)\n",
2163                                  smb_fname_str_dbg(smb_fname),
2164                                  existing_dos_attributes,
2165                                  new_dos_attributes,
2166                                  (unsigned int)smb_fname->st.st_ex_mode,
2167                                  (unsigned int)unx_mode ));
2168                         errno = EACCES;
2169                         return NT_STATUS_ACCESS_DENIED;
2170                 }
2171         }
2172
2173         status = smbd_calculate_access_mask(conn, smb_fname,
2174                                         false,
2175                                         access_mask,
2176                                         &access_mask);
2177         if (!NT_STATUS_IS_OK(status)) {
2178                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2179                         "on file %s returned %s\n",
2180                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2181                 return status;
2182         }
2183
2184         open_access_mask = access_mask;
2185
2186         if (flags2 & O_TRUNC) {
2187                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2188         }
2189
2190         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2191                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2192                     access_mask));
2193
2194         /*
2195          * Note that we ignore the append flag as append does not
2196          * mean the same thing under DOS and Unix.
2197          */
2198
2199         flags = calculate_open_access_flags(access_mask, oplock_request,
2200                                             private_flags);
2201
2202         /*
2203          * Currently we only look at FILE_WRITE_THROUGH for create options.
2204          */
2205
2206 #if defined(O_SYNC)
2207         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2208                 flags2 |= O_SYNC;
2209         }
2210 #endif /* O_SYNC */
2211
2212         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2213                 flags2 |= O_APPEND;
2214         }
2215
2216         if (!posix_open && !CAN_WRITE(conn)) {
2217                 /*
2218                  * We should really return a permission denied error if either
2219                  * O_CREAT or O_TRUNC are set, but for compatibility with
2220                  * older versions of Samba we just AND them out.
2221                  */
2222                 flags2 &= ~(O_CREAT|O_TRUNC);
2223         }
2224
2225         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2226                 /*
2227                  * With kernel oplocks the open breaking an oplock
2228                  * blocks until the oplock holder has given up the
2229                  * oplock or closed the file. We prevent this by first
2230                  * trying to open the file with O_NONBLOCK (see "man
2231                  * fcntl" on Linux). For the second try, triggered by
2232                  * an oplock break response, we do not need this
2233                  * anymore.
2234                  *
2235                  * This is true under the assumption that only Samba
2236                  * requests kernel oplocks. Once someone else like
2237                  * NFSv4 starts to use that API, we will have to
2238                  * modify this by communicating with the NFSv4 server.
2239                  */
2240                 flags2 |= O_NONBLOCK;
2241         }
2242
2243         /*
2244          * Ensure we can't write on a read-only share or file.
2245          */
2246
2247         if (flags != O_RDONLY && file_existed &&
2248             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2249                 DEBUG(5,("open_file_ntcreate: write access requested for "
2250                          "file %s on read only %s\n",
2251                          smb_fname_str_dbg(smb_fname),
2252                          !CAN_WRITE(conn) ? "share" : "file" ));
2253                 errno = EACCES;
2254                 return NT_STATUS_ACCESS_DENIED;
2255         }
2256
2257         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2258         fsp->share_access = share_access;
2259         fsp->fh->private_options = private_flags;
2260         fsp->access_mask = open_access_mask; /* We change this to the
2261                                               * requested access_mask after
2262                                               * the open is done. */
2263         fsp->posix_open = posix_open;
2264
2265         /* Ensure no SAMBA_PRIVATE bits can be set. */
2266         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2267
2268         if (timeval_is_zero(&request_time)) {
2269                 request_time = fsp->open_time;
2270         }
2271
2272         /*
2273          * Ensure we pay attention to default ACLs on directories if required.
2274          */
2275
2276         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2277             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2278                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2279         }
2280
2281         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2282                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2283                  (unsigned int)flags, (unsigned int)flags2,
2284                  (unsigned int)unx_mode, (unsigned int)access_mask,
2285                  (unsigned int)open_access_mask));
2286
2287         fsp_open = open_file(fsp, conn, req, parent_dir,
2288                              flags|flags2, unx_mode, access_mask,
2289                              open_access_mask, &new_file_created);
2290
2291         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2292                 struct deferred_open_record state;
2293
2294                 /*
2295                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2296                  */
2297                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2298                         DEBUG(10, ("FIFO busy\n"));
2299                         return NT_STATUS_NETWORK_BUSY;
2300                 }
2301                 if (req == NULL) {
2302                         DEBUG(10, ("Internal open busy\n"));
2303                         return NT_STATUS_NETWORK_BUSY;
2304                 }
2305
2306                 /*
2307                  * From here on we assume this is an oplock break triggered
2308                  */
2309
2310                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2311                 if (lck == NULL) {
2312                         state.delayed_for_oplocks = false;
2313                         state.async_open = false;
2314                         state.id = fsp->file_id;
2315                         defer_open(NULL, request_time, timeval_set(0, 0),
2316                                    req, &state);
2317                         DEBUG(10, ("No share mode lock found after "
2318                                    "EWOULDBLOCK, retrying sync\n"));
2319                         return NT_STATUS_SHARING_VIOLATION;
2320                 }
2321
2322                 find_oplock_types(fsp, 0, lck, &batch_entry, &exclusive_entry,
2323                                   &got_level2_oplock, &got_a_none_oplock);
2324
2325                 if (delay_for_batch_oplocks(fsp, req->mid, 0, batch_entry) ||
2326                     delay_for_exclusive_oplocks(fsp, req->mid, 0,
2327                                                 exclusive_entry)) {
2328                         schedule_defer_open(lck, request_time, req);
2329                         TALLOC_FREE(lck);
2330                         DEBUG(10, ("Sent oplock break request to kernel "
2331                                    "oplock holder\n"));
2332                         return NT_STATUS_SHARING_VIOLATION;
2333                 }
2334
2335                 /*
2336                  * No oplock from Samba around. Immediately retry with
2337                  * a blocking open.
2338                  */
2339                 state.delayed_for_oplocks = false;
2340                 state.async_open = false;
2341                 state.id = lck->data->id;
2342                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2343                 TALLOC_FREE(lck);
2344                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2345                            "Retrying sync\n"));
2346                 return NT_STATUS_SHARING_VIOLATION;
2347         }
2348
2349         if (!NT_STATUS_IS_OK(fsp_open)) {
2350                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2351                         schedule_async_open(request_time, req);
2352                 }
2353                 return fsp_open;
2354         }
2355
2356         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2357                 /*
2358                  * The file did exist, but some other (local or NFS)
2359                  * process either renamed/unlinked and re-created the
2360                  * file with different dev/ino after we walked the path,
2361                  * but before we did the open. We could retry the
2362                  * open but it's a rare enough case it's easier to
2363                  * just fail the open to prevent creating any problems
2364                  * in the open file db having the wrong dev/ino key.
2365                  */
2366                 fd_close(fsp);
2367                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2368                         "Old (dev=0x%llu, ino =0x%llu). "
2369                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2370                         " with NT_STATUS_ACCESS_DENIED.\n",
2371                          smb_fname_str_dbg(smb_fname),
2372                          (unsigned long long)saved_stat.st_ex_dev,
2373                          (unsigned long long)saved_stat.st_ex_ino,
2374                          (unsigned long long)smb_fname->st.st_ex_dev,
2375                          (unsigned long long)smb_fname->st.st_ex_ino));
2376                 return NT_STATUS_ACCESS_DENIED;
2377         }
2378
2379         old_write_time = smb_fname->st.st_ex_mtime;
2380
2381         /*
2382          * Deal with the race condition where two smbd's detect the
2383          * file doesn't exist and do the create at the same time. One
2384          * of them will win and set a share mode, the other (ie. this
2385          * one) should check if the requested share mode for this
2386          * create is allowed.
2387          */
2388
2389         /*
2390          * Now the file exists and fsp is successfully opened,
2391          * fsp->dev and fsp->inode are valid and should replace the
2392          * dev=0,inode=0 from a non existent file. Spotted by
2393          * Nadav Danieli <nadavd@exanet.com>. JRA.
2394          */
2395
2396         id = fsp->file_id;
2397
2398         lck = get_share_mode_lock(talloc_tos(), id,
2399                                   conn->connectpath,
2400                                   smb_fname, &old_write_time);
2401
2402         if (lck == NULL) {
2403                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2404                           "mode lock for %s\n",
2405                           smb_fname_str_dbg(smb_fname)));
2406                 fd_close(fsp);
2407                 return NT_STATUS_SHARING_VIOLATION;
2408         }
2409
2410         /* Get the types we need to examine. */
2411         find_oplock_types(fsp,
2412                           oplock_request,
2413                           lck,
2414                           &batch_entry,
2415                           &exclusive_entry,
2416                           &got_level2_oplock,
2417                           &got_a_none_oplock);
2418
2419         /* First pass - send break only on batch oplocks. */
2420         if ((req != NULL) &&
2421             delay_for_batch_oplocks(fsp,
2422                                     req->mid,
2423                                     oplock_request,
2424                                     batch_entry)) {
2425                 schedule_defer_open(lck, request_time, req);
2426                 TALLOC_FREE(lck);
2427                 fd_close(fsp);
2428                 return NT_STATUS_SHARING_VIOLATION;
2429         }
2430
2431         status = open_mode_check(conn, lck, fsp->name_hash,
2432                                  access_mask, share_access,
2433                                  create_options, &file_existed);
2434
2435         if (NT_STATUS_IS_OK(status)) {
2436                 /* We might be going to allow this open. Check oplock
2437                  * status again. */
2438                 /* Second pass - send break for both batch or
2439                  * exclusive oplocks. */
2440                 if ((req != NULL) &&
2441                     delay_for_exclusive_oplocks(
2442                             fsp,
2443                             req->mid,
2444                             oplock_request,
2445                             exclusive_entry)) {
2446                         schedule_defer_open(lck, request_time, req);
2447                         TALLOC_FREE(lck);
2448                         fd_close(fsp);
2449                         return NT_STATUS_SHARING_VIOLATION;
2450                 }
2451         }
2452
2453         if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2454                 /* DELETE_PENDING is not deferred for a second */
2455                 TALLOC_FREE(lck);
2456                 fd_close(fsp);
2457                 return status;
2458         }
2459
2460         if (!NT_STATUS_IS_OK(status)) {
2461                 uint32 can_access_mask;
2462                 bool can_access = True;
2463
2464                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2465
2466                 /* Check if this can be done with the deny_dos and fcb
2467                  * calls. */
2468                 if (private_flags &
2469                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2470                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2471                         if (req == NULL) {
2472                                 DEBUG(0, ("DOS open without an SMB "
2473                                           "request!\n"));
2474                                 TALLOC_FREE(lck);
2475                                 fd_close(fsp);
2476                                 return NT_STATUS_INTERNAL_ERROR;
2477                         }
2478
2479                         /* Use the client requested access mask here,
2480                          * not the one we open with. */
2481                         status = fcb_or_dos_open(req,
2482                                                  conn,
2483                                                  fsp,
2484                                                  smb_fname,
2485                                                  id,
2486                                                  req->smbpid,
2487                                                  req->vuid,
2488                                                  access_mask,
2489                                                  share_access,
2490                                                  create_options);
2491
2492                         if (NT_STATUS_IS_OK(status)) {
2493                                 TALLOC_FREE(lck);
2494                                 if (pinfo) {
2495                                         *pinfo = FILE_WAS_OPENED;
2496                                 }
2497                                 return NT_STATUS_OK;
2498                         }
2499                 }
2500
2501                 /*
2502                  * This next line is a subtlety we need for
2503                  * MS-Access. If a file open will fail due to share
2504                  * permissions and also for security (access) reasons,
2505                  * we need to return the access failed error, not the
2506                  * share error. We can't open the file due to kernel
2507                  * oplock deadlock (it's possible we failed above on
2508                  * the open_mode_check()) so use a userspace check.
2509                  */
2510
2511                 if (flags & O_RDWR) {
2512                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2513                 } else if (flags & O_WRONLY) {
2514                         can_access_mask = FILE_WRITE_DATA;
2515                 } else {
2516                         can_access_mask = FILE_READ_DATA;
2517                 }
2518
2519                 if (((can_access_mask & FILE_WRITE_DATA) &&
2520                      !CAN_WRITE(conn)) ||
2521                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2522                                                               smb_fname,
2523                                                               false,
2524                                                               can_access_mask))) {
2525                         can_access = False;
2526                 }
2527
2528                 /*
2529                  * If we're returning a share violation, ensure we
2530                  * cope with the braindead 1 second delay (SMB1 only).
2531                  */
2532
2533                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2534                     !conn->sconn->using_smb2 &&
2535                     lp_defer_sharing_violations()) {
2536                         struct timeval timeout;
2537                         struct deferred_open_record state;
2538                         int timeout_usecs;
2539
2540                         /* this is a hack to speed up torture tests
2541                            in 'make test' */
2542                         timeout_usecs = lp_parm_int(SNUM(conn),
2543                                                     "smbd","sharedelay",
2544                                                     SHARING_VIOLATION_USEC_WAIT);
2545
2546                         /* This is a relative time, added to the absolute
2547                            request_time value to get the absolute timeout time.
2548                            Note that if this is the second or greater time we enter
2549                            this codepath for this particular request mid then
2550                            request_time is left as the absolute time of the *first*
2551                            time this request mid was processed. This is what allows
2552                            the request to eventually time out. */
2553
2554                         timeout = timeval_set(0, timeout_usecs);
2555
2556                         /* Nothing actually uses state.delayed_for_oplocks
2557                            but it's handy to differentiate in debug messages
2558                            between a 30 second delay due to oplock break, and
2559                            a 1 second delay for share mode conflicts. */
2560
2561                         state.delayed_for_oplocks = False;
2562                         state.async_open = false;
2563                         state.id = id;
2564
2565                         if ((req != NULL)
2566                             && !request_timed_out(request_time,
2567                                                   timeout)) {
2568                                 defer_open(lck, request_time, timeout,
2569                                            req, &state);
2570                         }
2571                 }
2572
2573                 TALLOC_FREE(lck);
2574                 fd_close(fsp);
2575                 if (can_access) {
2576                         /*
2577                          * We have detected a sharing violation here
2578                          * so return the correct error code
2579                          */
2580                         status = NT_STATUS_SHARING_VIOLATION;
2581                 } else {
2582                         status = NT_STATUS_ACCESS_DENIED;
2583                 }
2584                 return status;
2585         }
2586
2587         grant_fsp_oplock_type(fsp,
2588                               oplock_request,
2589                               got_level2_oplock,
2590                               got_a_none_oplock);
2591
2592         /*
2593          * We have the share entry *locked*.....
2594          */
2595
2596         /* Delete streams if create_disposition requires it */
2597         if (!new_file_created && clear_ads(create_disposition) &&
2598             !is_ntfs_stream_smb_fname(smb_fname)) {
2599                 status = delete_all_streams(conn, smb_fname->base_name);
2600                 if (!NT_STATUS_IS_OK(status)) {
2601                         TALLOC_FREE(lck);
2602                         fd_close(fsp);
2603                         return status;
2604                 }
2605         }
2606
2607         /* note that we ignore failure for the following. It is
2608            basically a hack for NFS, and NFS will never set one of
2609            these only read them. Nobody but Samba can ever set a deny
2610            mode and we have already checked our more authoritative
2611            locking database for permission to set this deny mode. If
2612            the kernel refuses the operations then the kernel is wrong.
2613            note that GPFS supports it as well - jmcd */
2614
2615         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2616                 int ret_flock;
2617                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2618                 if(ret_flock == -1 ){
2619
2620                         TALLOC_FREE(lck);
2621                         fd_close(fsp);
2622
2623                         return NT_STATUS_SHARING_VIOLATION;
2624                 }
2625         }
2626
2627         /*
2628          * At this point onwards, we can guarantee that the share entry
2629          * is locked, whether we created the file or not, and that the
2630          * deny mode is compatible with all current opens.
2631          */
2632
2633         /*
2634          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2635          * but we don't have to store this - just ignore it on access check.
2636          */
2637         if (conn->sconn->using_smb2) {
2638                 /*
2639                  * SMB2 doesn't return it (according to Microsoft tests).
2640                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2641                  * File created with access = 0x7 (Read, Write, Delete)
2642                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2643                  */
2644                 fsp->access_mask = access_mask;
2645         } else {
2646                 /* But SMB1 does. */
2647                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2648         }
2649
2650         if (file_existed) {
2651                 /* stat opens on existing files don't get oplocks. */
2652                 if (is_stat_open(open_access_mask)) {
2653                         fsp->oplock_type = NO_OPLOCK;
2654                 }
2655         }
2656
2657         if (new_file_created) {
2658                 info = FILE_WAS_CREATED;
2659         } else {
2660                 if (flags2 & O_TRUNC) {
2661                         info = FILE_WAS_OVERWRITTEN;
2662                 } else {
2663                         info = FILE_WAS_OPENED;
2664                 }
2665         }
2666
2667         if (pinfo) {
2668                 *pinfo = info;
2669         }
2670
2671         /*
2672          * Setup the oplock info in both the shared memory and
2673          * file structs.
2674          */
2675
2676         status = set_file_oplock(fsp, fsp->oplock_type);
2677         if (!NT_STATUS_IS_OK(status)) {
2678                 /*
2679                  * Could not get the kernel oplock or there are byte-range
2680                  * locks on the file.
2681                  */
2682                 fsp->oplock_type = NO_OPLOCK;
2683         }
2684
2685         set_share_mode(lck, fsp, get_current_uid(conn),
2686                         req ? req->mid : 0,
2687                        fsp->oplock_type);
2688
2689         /* Handle strange delete on close create semantics. */
2690         if (create_options & FILE_DELETE_ON_CLOSE) {
2691
2692                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2693
2694                 if (!NT_STATUS_IS_OK(status)) {
2695                         /* Remember to delete the mode we just added. */
2696                         del_share_mode(lck, fsp);
2697                         TALLOC_FREE(lck);
2698                         fd_close(fsp);
2699                         return status;
2700                 }
2701                 /* Note that here we set the *inital* delete on close flag,
2702                    not the regular one. The magic gets handled in close. */
2703                 fsp->initial_delete_on_close = True;
2704         }
2705
2706         if (info != FILE_WAS_OPENED) {
2707                 /* Files should be initially set as archive */
2708                 if (lp_map_archive(SNUM(conn)) ||
2709                     lp_store_dos_attributes(SNUM(conn))) {
2710                         if (!posix_open) {
2711                                 if (file_set_dosmode(conn, smb_fname,
2712                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2713                                             parent_dir, true) == 0) {
2714                                         unx_mode = smb_fname->st.st_ex_mode;
2715                                 }
2716                         }
2717                 }
2718         }
2719
2720         /* Determine sparse flag. */
2721         if (posix_open) {
2722                 /* POSIX opens are sparse by default. */
2723                 fsp->is_sparse = true;
2724         } else {
2725                 fsp->is_sparse = (file_existed &&
2726                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2727         }
2728
2729         /*
2730          * Take care of inherited ACLs on created files - if default ACL not
2731          * selected.
2732          */
2733
2734         if (!posix_open && new_file_created && !def_acl) {
2735
2736                 int saved_errno = errno; /* We might get ENOSYS in the next
2737                                           * call.. */
2738
2739                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2740                     errno == ENOSYS) {
2741                         errno = saved_errno; /* Ignore ENOSYS */
2742                 }
2743
2744         } else if (new_unx_mode) {
2745
2746                 int ret = -1;
2747
2748                 /* Attributes need changing. File already existed. */
2749
2750                 {
2751                         int saved_errno = errno; /* We might get ENOSYS in the
2752                                                   * next call.. */
2753                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2754
2755                         if (ret == -1 && errno == ENOSYS) {
2756                                 errno = saved_errno; /* Ignore ENOSYS */
2757                         } else {
2758                                 DEBUG(5, ("open_file_ntcreate: reset "
2759                                           "attributes of file %s to 0%o\n",
2760                                           smb_fname_str_dbg(smb_fname),
2761                                           (unsigned int)new_unx_mode));
2762                                 ret = 0; /* Don't do the fchmod below. */
2763                         }
2764                 }
2765
2766                 if ((ret == -1) &&
2767                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2768                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2769                                   "attributes of file %s to 0%o\n",
2770                                   smb_fname_str_dbg(smb_fname),
2771                                   (unsigned int)new_unx_mode));
2772         }
2773
2774         TALLOC_FREE(lck);
2775
2776         return NT_STATUS_OK;
2777 }
2778
2779
2780 /****************************************************************************
2781  Open a file for for write to ensure that we can fchmod it.
2782 ****************************************************************************/
2783
2784 NTSTATUS open_file_fchmod(connection_struct *conn,
2785                           struct smb_filename *smb_fname,
2786                           files_struct **result)
2787 {
2788         if (!VALID_STAT(smb_fname->st)) {
2789                 return NT_STATUS_INVALID_PARAMETER;
2790         }
2791
2792         return SMB_VFS_CREATE_FILE(
2793                 conn,                                   /* conn */
2794                 NULL,                                   /* req */
2795                 0,                                      /* root_dir_fid */
2796                 smb_fname,                              /* fname */
2797                 FILE_WRITE_DATA,                        /* access_mask */
2798                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2799                     FILE_SHARE_DELETE),
2800                 FILE_OPEN,                              /* create_disposition*/
2801                 0,                                      /* create_options */
2802                 0,                                      /* file_attributes */
2803                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2804                 0,                                      /* allocation_size */
2805                 0,                                      /* private_flags */
2806                 NULL,                                   /* sd */
2807                 NULL,                                   /* ea_list */
2808                 result,                                 /* result */
2809                 NULL);                                  /* pinfo */
2810 }
2811
2812 static NTSTATUS mkdir_internal(connection_struct *conn,
2813                                struct smb_filename *smb_dname,
2814                                uint32 file_attributes)
2815 {
2816         mode_t mode;
2817         char *parent_dir = NULL;
2818         NTSTATUS status;
2819         bool posix_open = false;
2820         bool need_re_stat = false;
2821         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2822
2823         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2824                 DEBUG(5,("mkdir_internal: failing share access "
2825                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2826                 return NT_STATUS_ACCESS_DENIED;
2827         }
2828
2829         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2830                             NULL)) {
2831                 return NT_STATUS_NO_MEMORY;
2832         }
2833
2834         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2835                 posix_open = true;
2836                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2837         } else {
2838                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2839         }
2840
2841         status = check_parent_access(conn,
2842                                         smb_dname,
2843                                         access_mask);
2844         if(!NT_STATUS_IS_OK(status)) {
2845                 DEBUG(5,("mkdir_internal: check_parent_access "
2846                         "on directory %s for path %s returned %s\n",
2847                         parent_dir,
2848                         smb_dname->base_name,
2849                         nt_errstr(status) ));
2850                 return status;
2851         }
2852
2853         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2854                 return map_nt_error_from_unix(errno);
2855         }
2856
2857         /* Ensure we're checking for a symlink here.... */
2858         /* We don't want to get caught by a symlink racer. */
2859
2860         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2861                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2862                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2863                 return map_nt_error_from_unix(errno);
2864         }
2865
2866         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2867                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2868                           smb_fname_str_dbg(smb_dname)));
2869                 return NT_STATUS_NOT_A_DIRECTORY;
2870         }
2871
2872         if (lp_store_dos_attributes(SNUM(conn))) {
2873                 if (!posix_open) {
2874                         file_set_dosmode(conn, smb_dname,
2875                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2876                                          parent_dir, true);
2877                 }
2878         }
2879
2880         if (lp_inherit_perms(SNUM(conn))) {
2881                 inherit_access_posix_acl(conn, parent_dir,
2882                                          smb_dname->base_name, mode);
2883                 need_re_stat = true;
2884         }
2885
2886         if (!posix_open) {
2887                 /*
2888                  * Check if high bits should have been set,
2889                  * then (if bits are missing): add them.
2890                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2891                  * dir.
2892                  */
2893                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2894                     (mode & ~smb_dname->st.st_ex_mode)) {
2895                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2896                                       (smb_dname->st.st_ex_mode |
2897                                           (mode & ~smb_dname->st.st_ex_mode)));
2898                         need_re_stat = true;
2899                 }
2900         }
2901
2902         /* Change the owner if required. */
2903         if (lp_inherit_owner(SNUM(conn))) {
2904                 change_dir_owner_to_parent(conn, parent_dir,
2905                                            smb_dname->base_name,
2906                                            &smb_dname->st);
2907                 need_re_stat = true;
2908         }
2909
2910         if (need_re_stat) {
2911                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2912                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2913                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2914                         return map_nt_error_from_unix(errno);
2915                 }
2916         }
2917
2918         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2919                      smb_dname->base_name);
2920
2921         return NT_STATUS_OK;
2922 }
2923
2924 /****************************************************************************
2925  Open a directory from an NT SMB call.
2926 ****************************************************************************/
2927
2928 static NTSTATUS open_directory(connection_struct *conn,
2929                                struct smb_request *req,
2930                                struct smb_filename *smb_dname,
2931                                uint32 access_mask,
2932                                uint32 share_access,
2933                                uint32 create_disposition,
2934                                uint32 create_options,
2935                                uint32 file_attributes,
2936                                int *pinfo,
2937                                files_struct **result)
2938 {
2939         files_struct *fsp = NULL;
2940         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2941         struct share_mode_lock *lck = NULL;
2942         NTSTATUS status;
2943         struct timespec mtimespec;
2944         int info = 0;
2945
2946         if (is_ntfs_stream_smb_fname(smb_dname)) {
2947                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2948                           smb_fname_str_dbg(smb_dname)));
2949                 return NT_STATUS_NOT_A_DIRECTORY;
2950         }
2951
2952         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2953                 /* Ensure we have a directory attribute. */
2954                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2955         }
2956
2957         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2958                  "share_access = 0x%x create_options = 0x%x, "
2959                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2960                  smb_fname_str_dbg(smb_dname),
2961                  (unsigned int)access_mask,
2962                  (unsigned int)share_access,
2963                  (unsigned int)create_options,
2964                  (unsigned int)create_disposition,
2965                  (unsigned int)file_attributes));
2966
2967         status = smbd_calculate_access_mask(conn, smb_dname, false,
2968                                             access_mask, &access_mask);
2969         if (!NT_STATUS_IS_OK(status)) {
2970                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2971                         "on file %s returned %s\n",
2972                         smb_fname_str_dbg(smb_dname),
2973                         nt_errstr(status)));
2974                 return status;
2975         }
2976
2977         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2978                         !security_token_has_privilege(get_current_nttok(conn),
2979                                         SEC_PRIV_SECURITY)) {
2980                 DEBUG(10, ("open_directory: open on %s "
2981                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2982                         smb_fname_str_dbg(smb_dname)));
2983                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2984         }
2985
2986         switch( create_disposition ) {
2987                 case FILE_OPEN:
2988
2989                         if (!dir_existed) {
2990                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2991                         }
2992
2993                         info = FILE_WAS_OPENED;
2994                         break;
2995
2996                 case FILE_CREATE:
2997
2998                         /* If directory exists error. If directory doesn't
2999                          * exist create. */
3000
3001                         if (dir_existed) {
3002                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
3003                                 DEBUG(2, ("open_directory: unable to create "
3004                                           "%s. Error was %s\n",
3005                                           smb_fname_str_dbg(smb_dname),
3006                                           nt_errstr(status)));
3007                                 return status;
3008                         }
3009
3010                         status = mkdir_internal(conn, smb_dname,
3011                                                 file_attributes);
3012
3013                         if (!NT_STATUS_IS_OK(status)) {
3014                                 DEBUG(2, ("open_directory: unable to create "
3015                                           "%s. Error was %s\n",
3016                                           smb_fname_str_dbg(smb_dname),
3017                                           nt_errstr(status)));
3018                                 return status;
3019                         }
3020
3021                         info = FILE_WAS_CREATED;
3022                         break;
3023
3024                 case FILE_OPEN_IF:
3025                         /*
3026                          * If directory exists open. If directory doesn't
3027                          * exist create.
3028                          */
3029
3030                         if (dir_existed) {
3031                                 status = NT_STATUS_OK;
3032                                 info = FILE_WAS_OPENED;
3033                         } else {
3034                                 status = mkdir_internal(conn, smb_dname,
3035                                                 file_attributes);
3036
3037                                 if (NT_STATUS_IS_OK(status)) {
3038                                         info = FILE_WAS_CREATED;
3039                                 } else {
3040                                         /* Cope with create race. */
3041                                         if (!NT_STATUS_EQUAL(status,
3042                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3043                                                 DEBUG(2, ("open_directory: unable to create "
3044                                                         "%s. Error was %s\n",
3045                                                         smb_fname_str_dbg(smb_dname),
3046                                                         nt_errstr(status)));
3047                                                 return status;
3048                                         }
3049                                         info = FILE_WAS_OPENED;
3050                                 }
3051                         }
3052
3053                         break;
3054
3055                 case FILE_SUPERSEDE:
3056                 case FILE_OVERWRITE:
3057                 case FILE_OVERWRITE_IF:
3058                 default:
3059                         DEBUG(5,("open_directory: invalid create_disposition "
3060                                  "0x%x for directory %s\n",
3061                                  (unsigned int)create_disposition,
3062                                  smb_fname_str_dbg(smb_dname)));
3063                         return NT_STATUS_INVALID_PARAMETER;
3064         }
3065
3066         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3067                 DEBUG(5,("open_directory: %s is not a directory !\n",
3068                          smb_fname_str_dbg(smb_dname)));
3069                 return NT_STATUS_NOT_A_DIRECTORY;
3070         }
3071
3072         if (info == FILE_WAS_OPENED) {
3073                 status = smbd_check_access_rights(conn,
3074                                                 smb_dname,
3075                                                 false,
3076                                                 access_mask);
3077                 if (!NT_STATUS_IS_OK(status)) {
3078                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3079                                 "file %s failed with %s\n",
3080                                 smb_fname_str_dbg(smb_dname),
3081                                 nt_errstr(status)));
3082                         return status;
3083                 }
3084         }
3085
3086         status = file_new(req, conn, &fsp);
3087         if(!NT_STATUS_IS_OK(status)) {
3088                 return status;
3089         }
3090
3091         /*
3092          * Setup the files_struct for it.
3093          */
3094
3095         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3096         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3097         fsp->file_pid = req ? req->smbpid : 0;
3098         fsp->can_lock = False;
3099         fsp->can_read = False;
3100         fsp->can_write = False;
3101
3102         fsp->share_access = share_access;
3103         fsp->fh->private_options = 0;
3104         /*
3105          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3106          */
3107         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3108         fsp->print_file = NULL;
3109         fsp->modified = False;
3110         fsp->oplock_type = NO_OPLOCK;
3111         fsp->sent_oplock_break = NO_BREAK_SENT;
3112         fsp->is_directory = True;
3113         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3114         status = fsp_set_smb_fname(fsp, smb_dname);
3115         if (!NT_STATUS_IS_OK(status)) {
3116                 file_free(req, fsp);
3117                 return status;
3118         }
3119
3120         mtimespec = smb_dname->st.st_ex_mtime;
3121
3122 #ifdef O_DIRECTORY
3123         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3124 #else
3125         /* POSIX allows us to open a directory with O_RDONLY. */
3126         status = fd_open(conn, fsp, O_RDONLY, 0);
3127 #endif
3128         if (!NT_STATUS_IS_OK(status)) {
3129                 DEBUG(5, ("open_directory: Could not open fd for "
3130                         "%s (%s)\n",
3131                         smb_fname_str_dbg(smb_dname),
3132                         nt_errstr(status)));
3133                 file_free(req, fsp);
3134                 return status;
3135         }
3136
3137         status = vfs_stat_fsp(fsp);
3138         if (!NT_STATUS_IS_OK(status)) {
3139                 fd_close(fsp);
3140                 file_free(req, fsp);
3141                 return status;
3142         }
3143
3144         /* Ensure there was no race condition. */
3145         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3146                 DEBUG(5,("open_directory: stat struct differs for "
3147                         "directory %s.\n",
3148                         smb_fname_str_dbg(smb_dname)));
3149                 fd_close(fsp);
3150                 file_free(req, fsp);
3151                 return NT_STATUS_ACCESS_DENIED;
3152         }
3153
3154         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3155                                   conn->connectpath, smb_dname,
3156                                   &mtimespec);
3157
3158         if (lck == NULL) {
3159                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3160                           "%s\n", smb_fname_str_dbg(smb_dname)));
3161                 fd_close(fsp);
3162                 file_free(req, fsp);
3163                 return NT_STATUS_SHARING_VIOLATION;
3164         }
3165
3166         status = open_mode_check(conn, lck, fsp->name_hash,
3167                                 access_mask, share_access,
3168                                  create_options, &dir_existed);
3169
3170         if (!NT_STATUS_IS_OK(status)) {
3171                 TALLOC_FREE(lck);
3172                 fd_close(fsp);
3173                 file_free(req, fsp);
3174                 return status;
3175         }
3176
3177         set_share_mode(lck, fsp, get_current_uid(conn),
3178                         req ? req->mid : 0, NO_OPLOCK);
3179
3180         /* For directories the delete on close bit at open time seems
3181            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3182         if (create_options & FILE_DELETE_ON_CLOSE) {
3183                 status = can_set_delete_on_close(fsp, 0);
3184                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3185                         TALLOC_FREE(lck);
3186                         fd_close(fsp);
3187                         file_free(req, fsp);
3188                         return status;
3189                 }
3190
3191                 if (NT_STATUS_IS_OK(status)) {
3192                         /* Note that here we set the *inital* delete on close flag,
3193                            not the regular one. The magic gets handled in close. */
3194                         fsp->initial_delete_on_close = True;
3195                 }
3196         }
3197
3198         TALLOC_FREE(lck);
3199
3200         if (pinfo) {
3201                 *pinfo = info;
3202         }
3203
3204         *result = fsp;
3205         return NT_STATUS_OK;
3206 }
3207
3208 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3209                           struct smb_filename *smb_dname)
3210 {
3211         NTSTATUS status;
3212         files_struct *fsp;
3213
3214         status = SMB_VFS_CREATE_FILE(
3215                 conn,                                   /* conn */
3216                 req,                                    /* req */
3217                 0,                                      /* root_dir_fid */
3218                 smb_dname,                              /* fname */
3219                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3220                 FILE_SHARE_NONE,                        /* share_access */
3221                 FILE_CREATE,                            /* create_disposition*/
3222                 FILE_DIRECTORY_FILE,                    /* create_options */
3223                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3224                 0,                                      /* oplock_request */
3225                 0,                                      /* allocation_size */
3226                 0,                                      /* private_flags */
3227                 NULL,                                   /* sd */
3228                 NULL,                                   /* ea_list */
3229                 &fsp,                                   /* result */
3230                 NULL);                                  /* pinfo */
3231
3232         if (NT_STATUS_IS_OK(status)) {
3233                 close_file(req, fsp, NORMAL_CLOSE);
3234         }
3235
3236         return status;
3237 }
3238
3239 /****************************************************************************
3240  Receive notification that one of our open files has been renamed by another
3241  smbd process.
3242 ****************************************************************************/
3243
3244 void msg_file_was_renamed(struct messaging_context *msg,
3245                           void *private_data,
3246                           uint32_t msg_type,
3247                           struct server_id server_id,
3248                           DATA_BLOB *data)
3249 {
3250         files_struct *fsp;
3251         char *frm = (char *)data->data;
3252         struct file_id id;
3253         const char *sharepath;
3254         const char *base_name;
3255         const char *stream_name;
3256         struct smb_filename *smb_fname = NULL;
3257         size_t sp_len, bn_len;
3258         NTSTATUS status;
3259         struct smbd_server_connection *sconn =
3260                 talloc_get_type_abort(private_data,
3261                 struct smbd_server_connection);
3262
3263         if (data->data == NULL
3264             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3265                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3266                           (int)data->length));
3267                 return;
3268         }
3269
3270         /* Unpack the message. */
3271         pull_file_id_24(frm, &id);
3272         sharepath = &frm[24];
3273         sp_len = strlen(sharepath);
3274         base_name = sharepath + sp_len + 1;
3275         bn_len = strlen(base_name);
3276         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3277
3278         /* stream_name must always be NULL if there is no stream. */
3279         if (stream_name[0] == '\0') {
3280                 stream_name = NULL;
3281         }
3282
3283         smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3284                                         stream_name, NULL);
3285         if (smb_fname == NULL) {
3286                 return;
3287         }
3288
3289         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3290                 "file_id %s\n",
3291                 sharepath, smb_fname_str_dbg(smb_fname),
3292                 file_id_string_tos(&id)));
3293
3294         for(fsp = file_find_di_first(sconn, id); fsp;
3295             fsp = file_find_di_next(fsp)) {
3296                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3297
3298                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3299                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3300                                 smb_fname_str_dbg(smb_fname)));
3301                         status = fsp_set_smb_fname(fsp, smb_fname);
3302                         if (!NT_STATUS_IS_OK(status)) {
3303                                 goto out;
3304                         }
3305                 } else {
3306                         /* TODO. JRA. */
3307                         /* Now we have the complete path we can work out if this is
3308                            actually within this share and adjust newname accordingly. */
3309                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3310                                 "not sharepath %s) "
3311                                 "%s from %s -> %s\n",
3312                                 fsp->conn->connectpath,
3313                                 sharepath,
3314                                 fsp_fnum_dbg(fsp),
3315                                 fsp_str_dbg(fsp),
3316                                 smb_fname_str_dbg(smb_fname)));
3317                 }
3318         }
3319  out:
3320         TALLOC_FREE(smb_fname);
3321         return;
3322 }
3323
3324 /*
3325  * If a main file is opened for delete, all streams need to be checked for
3326  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3327  * If that works, delete them all by setting the delete on close and close.
3328  */
3329
3330 NTSTATUS open_streams_for_delete(connection_struct *conn,
3331                                         const char *fname)
3332 {
3333         struct stream_struct *stream_info = NULL;
3334         files_struct **streams = NULL;
3335         int i;
3336         unsigned int num_streams = 0;
3337         TALLOC_CTX *frame = talloc_stackframe();
3338         NTSTATUS status;
3339
3340         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3341                                 &num_streams, &stream_info);
3342
3343         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3344             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3345                 DEBUG(10, ("no streams around\n"));
3346                 TALLOC_FREE(frame);
3347                 return NT_STATUS_OK;
3348         }
3349
3350         if (!NT_STATUS_IS_OK(status)) {
3351                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3352                            nt_errstr(status)));
3353                 goto fail;
3354         }
3355
3356         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3357                    num_streams));
3358
3359         if (num_streams == 0) {
3360                 TALLOC_FREE(frame);
3361                 return NT_STATUS_OK;
3362         }
3363
3364         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3365         if (streams == NULL) {
3366                 DEBUG(0, ("talloc failed\n"));
3367                 status = NT_STATUS_NO_MEMORY;
3368                 goto fail;
3369         }
3370
3371         for (i=0; i<num_streams; i++) {
3372                 struct smb_filename *smb_fname;
3373
3374                 if (strequal(stream_info[i].name, "::$DATA")) {
3375                         streams[i] = NULL;
3376                         continue;
3377                 }
3378
3379                 smb_fname = synthetic_smb_fname(
3380                         talloc_tos(), fname, stream_info[i].name, NULL);
3381                 if (smb_fname == NULL) {
3382                         status = NT_STATUS_NO_MEMORY;
3383                         goto fail;
3384                 }
3385
3386                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3387                         DEBUG(10, ("Unable to stat stream: %s\n",
3388                                    smb_fname_str_dbg(smb_fname)));
3389                 }
3390
3391                 status = SMB_VFS_CREATE_FILE(
3392                          conn,                  /* conn */
3393                          NULL,                  /* req */
3394                          0,                     /* root_dir_fid */
3395                          smb_fname,             /* fname */
3396                          DELETE_ACCESS,         /* access_mask */
3397                          (FILE_SHARE_READ |     /* share_access */
3398                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3399                          FILE_OPEN,             /* create_disposition*/
3400                          0,                     /* create_options */
3401                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3402                          0,                     /* oplock_request */
3403                          0,                     /* allocation_size */
3404                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3405                          NULL,                  /* sd */
3406                          NULL,                  /* ea_list */
3407                          &streams[i],           /* result */
3408                          NULL);                 /* pinfo */
3409
3410                 if (!NT_STATUS_IS_OK(status)) {
3411                         DEBUG(10, ("Could not open stream %s: %s\n",
3412                                    smb_fname_str_dbg(smb_fname),
3413                                    nt_errstr(status)));
3414
3415                         TALLOC_FREE(smb_fname);
3416                         break;
3417                 }
3418                 TALLOC_FREE(smb_fname);
3419         }
3420
3421         /*
3422          * don't touch the variable "status" beyond this point :-)
3423          */
3424
3425         for (i -= 1 ; i >= 0; i--) {
3426                 if (streams[i] == NULL) {
3427                         continue;
3428                 }
3429
3430                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3431                            fsp_str_dbg(streams[i])));
3432                 close_file(NULL, streams[i], NORMAL_CLOSE);
3433         }
3434
3435  fail:
3436         TALLOC_FREE(frame);
3437         return status;
3438 }
3439
3440 /*********************************************************************
3441  Create a default ACL by inheriting from the parent. If no inheritance
3442  from the parent available, don't set anything. This will leave the actual
3443  permissions the new file or directory already got from the filesystem
3444  as the NT ACL when read.
3445 *********************************************************************/
3446
3447 static NTSTATUS inherit_new_acl(files_struct *fsp)
3448 {
3449         TALLOC_CTX *frame = talloc_stackframe();
3450         char *parent_name = NULL;
3451         struct security_descriptor *parent_desc = NULL;
3452         NTSTATUS status = NT_STATUS_OK;
3453         struct security_descriptor *psd = NULL;
3454         const struct dom_sid *owner_sid = NULL;
3455         const struct dom_sid *group_sid = NULL;
3456         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3457         struct security_token *token = fsp->conn->session_info->security_token;
3458         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3459         bool inheritable_components = false;
3460         bool try_builtin_administrators = false;
3461         const struct dom_sid *BA_U_sid = NULL;
3462         const struct dom_sid *BA_G_sid = NULL;
3463         bool try_system = false;
3464         const struct dom_sid *SY_U_sid = NULL;
3465         const struct dom_sid *SY_G_sid = NULL;
3466         size_t size = 0;
3467
3468         if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3469                 TALLOC_FREE(frame);
3470                 return NT_STATUS_NO_MEMORY;
3471         }
3472
3473         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3474                                     parent_name,
3475                                     (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3476                                     frame,
3477                                     &parent_desc);
3478         if (!NT_STATUS_IS_OK(status)) {
3479                 TALLOC_FREE(frame);
3480                 return status;
3481         }
3482
3483         inheritable_components = sd_has_inheritable_components(parent_desc,
3484                                         fsp->is_directory);
3485
3486         if (!inheritable_components && !inherit_owner) {
3487                 TALLOC_FREE(frame);
3488                 /* Nothing to inherit and not setting owner. */
3489                 return NT_STATUS_OK;
3490         }
3491
3492         /* Create an inherited descriptor from the parent. */
3493
3494         if (DEBUGLEVEL >= 10) {
3495                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3496                         fsp_str_dbg(fsp) ));
3497                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3498         }
3499
3500         /* Inherit from parent descriptor if "inherit owner" set. */
3501         if (inherit_owner) {
3502                 owner_sid = parent_desc->owner_sid;
3503                 group_sid = parent_desc->group_sid;
3504         }
3505
3506         if (owner_sid == NULL) {
3507                 if (security_token_has_builtin_administrators(token)) {
3508                         try_builtin_administrators = true;
3509                 } else if (security_token_is_system(token)) {
3510                         try_builtin_administrators = true;
3511                         try_system = true;
3512                 }
3513         }
3514
3515         if (group_sid == NULL &&
3516             token->num_sids == PRIMARY_GROUP_SID_INDEX)
3517         {
3518                 if (security_token_is_system(token)) {
3519                         try_builtin_administrators = true;
3520                         try_system = true;
3521                 }
3522         }
3523
3524         if (try_builtin_administrators) {
3525                 struct unixid ids;
3526                 bool ok;
3527
3528                 ZERO_STRUCT(ids);
3529                 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
3530                 if (ok) {
3531                         switch (ids.type) {
3532                         case ID_TYPE_BOTH:
3533                                 BA_U_sid = &global_sid_Builtin_Administrators;
3534                                 BA_G_sid = &global_sid_Builtin_Administrators;
3535                                 break;
3536                         case ID_TYPE_UID:
3537                                 BA_U_sid = &global_sid_Builtin_Administrators;
3538                                 break;
3539                         case ID_TYPE_GID:
3540                                 BA_G_sid = &global_sid_Builtin_Administrators;
3541                                 break;
3542                         default:
3543                                 break;
3544                         }
3545                 }
3546         }
3547
3548         if (try_system) {
3549                 struct unixid ids;
3550                 bool ok;
3551
3552                 ZERO_STRUCT(ids);
3553                 ok = sids_to_unixids(&global_sid_System, 1, &ids);
3554                 if (ok) {
3555                         switch (ids.type) {
3556                         case ID_TYPE_BOTH:
3557                                 SY_U_sid = &global_sid_System;
3558                                 SY_G_sid = &global_sid_System;
3559                                 break;
3560                         case ID_TYPE_UID:
3561                                 SY_U_sid = &global_sid_System;
3562                                 break;
3563                         case ID_TYPE_GID:
3564                                 SY_G_sid = &global_sid_System;
3565                                 break;
3566                         default:
3567                                 break;
3568                         }
3569                 }
3570         }
3571
3572         if (owner_sid == NULL) {
3573                 owner_sid = BA_U_sid;
3574         }
3575
3576         if (owner_sid == NULL) {
3577                 owner_sid = SY_U_sid;
3578         }
3579
3580         if (group_sid == NULL) {
3581                 group_sid = SY_G_sid;
3582         }
3583
3584         if (try_system && group_sid == NULL) {
3585                 group_sid = BA_G_sid;
3586         }
3587
3588         if (owner_sid == NULL) {
3589                 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3590         }
3591         if (group_sid == NULL) {
3592                 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
3593                         group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
3594                 } else {
3595                         group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
3596                 }
3597         }
3598
3599         status = se_create_child_secdesc(frame,
3600                         &psd,
3601                         &size,
3602                         parent_desc,
3603                         owner_sid,
3604                         group_sid,
3605                         fsp->is_directory);
3606         if (!NT_STATUS_IS_OK(status)) {
3607                 TALLOC_FREE(frame);
3608                 return status;
3609         }
3610
3611         /* If inheritable_components == false,
3612            se_create_child_secdesc()
3613            creates a security desriptor with a NULL dacl
3614            entry, but with SEC_DESC_DACL_PRESENT. We need
3615            to remove that flag. */
3616
3617         if (!inheritable_components) {
3618                 security_info_sent &= ~SECINFO_DACL;
3619                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3620         }
3621
3622         if (DEBUGLEVEL >= 10) {
3623                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3624                         fsp_str_dbg(fsp) ));
3625                 NDR_PRINT_DEBUG(security_descriptor, psd);
3626         }
3627
3628         if (inherit_owner) {
3629                 /* We need to be root to force this. */
3630                 become_root();
3631         }
3632         status = SMB_VFS_FSET_NT_ACL(fsp,
3633                         security_info_sent,
3634                         psd);
3635         if (inherit_owner) {
3636                 unbecome_root();
3637         }
3638         TALLOC_FREE(frame);
3639         return status;
3640 }
3641
3642 /*
3643  * Wrapper around open_file_ntcreate and open_directory
3644  */
3645
3646 static NTSTATUS create_file_unixpath(connection_struct *conn,
3647                                      struct smb_request *req,
3648                                      struct smb_filename *smb_fname,
3649                                      uint32_t access_mask,
3650                                      uint32_t share_access,
3651                                      uint32_t create_disposition,
3652                                      uint32_t create_options,
3653                                      uint32_t file_attributes,
3654                                      uint32_t oplock_request,
3655                                      uint64_t allocation_size,
3656                                      uint32_t private_flags,
3657                                      struct security_descriptor *sd,
3658                                      struct ea_list *ea_list,
3659
3660                                      files_struct **result,
3661                                      int *pinfo)
3662 {
3663         int info = FILE_WAS_OPENED;
3664         files_struct *base_fsp = NULL;
3665         files_struct *fsp = NULL;
3666         NTSTATUS status;
3667
3668         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3669                   "file_attributes = 0x%x, share_access = 0x%x, "
3670                   "create_disposition = 0x%x create_options = 0x%x "
3671                   "oplock_request = 0x%x private_flags = 0x%x "
3672                   "ea_list = 0x%p, sd = 0x%p, "
3673                   "fname = %s\n",
3674                   (unsigned int)access_mask,
3675                   (unsigned int)file_attributes,
3676                   (unsigned int)share_access,
3677                   (unsigned int)create_disposition,
3678                   (unsigned int)create_options,
3679                   (unsigned int)oplock_request,
3680                   (unsigned int)private_flags,
3681                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3682
3683         if (create_options & FILE_OPEN_BY_FILE_ID) {
3684                 status = NT_STATUS_NOT_SUPPORTED;
3685                 goto fail;
3686         }
3687
3688         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3689                 status = NT_STATUS_INVALID_PARAMETER;
3690                 goto fail;
3691         }
3692
3693         if (req == NULL) {
3694                 oplock_request |= INTERNAL_OPEN_ONLY;
3695         }
3696
3697         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3698             && (access_mask & DELETE_ACCESS)
3699             && !is_ntfs_stream_smb_fname(smb_fname)) {
3700                 /*
3701                  * We can't open a file with DELETE access if any of the
3702                  * streams is open without FILE_SHARE_DELETE
3703                  */
3704                 status = open_streams_for_delete(conn, smb_fname->base_name);
3705
3706                 if (!NT_STATUS_IS_OK(status)) {
3707                         goto fail;
3708                 }
3709         }
3710
3711         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3712                         !security_token_has_privilege(get_current_nttok(conn),
3713                                         SEC_PRIV_SECURITY)) {
3714                 DEBUG(10, ("create_file_unixpath: open on %s "
3715                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3716                         smb_fname_str_dbg(smb_fname)));
3717                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3718                 goto fail;
3719         }
3720
3721         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3722             && is_ntfs_stream_smb_fname(smb_fname)
3723             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3724                 uint32 base_create_disposition;
3725                 struct smb_filename *smb_fname_base = NULL;
3726
3727                 if (create_options & FILE_DIRECTORY_FILE) {
3728                         status = NT_STATUS_NOT_A_DIRECTORY;
3729                         goto fail;
3730                 }
3731
3732                 switch (create_disposition) {
3733                 case FILE_OPEN:
3734                         base_create_disposition = FILE_OPEN;
3735                         break;
3736                 default:
3737                         base_create_disposition = FILE_OPEN_IF;
3738                         break;
3739                 }
3740
3741                 /* Create an smb_filename with stream_name == NULL. */
3742                 smb_fname_base = synthetic_smb_fname(talloc_tos(),
3743                                                      smb_fname->base_name,
3744                                                      NULL, NULL);
3745                 if (smb_fname_base == NULL) {
3746                         status = NT_STATUS_NO_MEMORY;
3747                         goto fail;
3748                 }
3749
3750                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3751                         DEBUG(10, ("Unable to stat stream: %s\n",
3752                                    smb_fname_str_dbg(smb_fname_base)));
3753                 }
3754
3755                 /* Open the base file. */
3756                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3757                                               FILE_SHARE_READ
3758                                               | FILE_SHARE_WRITE
3759                                               | FILE_SHARE_DELETE,
3760                                               base_create_disposition,
3761                                               0, 0, 0, 0, 0, NULL, NULL,
3762                                               &base_fsp, NULL);
3763                 TALLOC_FREE(smb_fname_base);
3764
3765                 if (!NT_STATUS_IS_OK(status)) {
3766                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3767                                    "%s\n", smb_fname->base_name,
3768                                    nt_errstr(status)));
3769                         goto fail;
3770                 }
3771                 /* we don't need to low level fd */
3772                 fd_close(base_fsp);
3773         }
3774
3775         /*
3776          * If it's a request for a directory open, deal with it separately.
3777          */
3778
3779         if (create_options & FILE_DIRECTORY_FILE) {
3780
3781                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3782                         status = NT_STATUS_INVALID_PARAMETER;
3783                         goto fail;
3784                 }
3785
3786                 /* Can't open a temp directory. IFS kit test. */
3787                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3788                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3789                         status = NT_STATUS_INVALID_PARAMETER;
3790                         goto fail;
3791                 }
3792
3793                 /*
3794                  * We will get a create directory here if the Win32
3795                  * app specified a security descriptor in the
3796                  * CreateDirectory() call.
3797                  */
3798
3799                 oplock_request = 0;
3800                 status = open_directory(
3801                         conn, req, smb_fname, access_mask, share_access,
3802                         create_disposition, create_options, file_attributes,
3803                         &info, &fsp);
3804         } else {
3805
3806                 /*
3807                  * Ordinary file case.
3808                  */
3809
3810                 status = file_new(req, conn, &fsp);
3811                 if(!NT_STATUS_IS_OK(status)) {
3812                         goto fail;
3813                 }
3814
3815                 status = fsp_set_smb_fname(fsp, smb_fname);
3816                 if (!NT_STATUS_IS_OK(status)) {
3817                         goto fail;
3818                 }
3819
3820                 if (base_fsp) {
3821                         /*
3822                          * We're opening the stream element of a
3823                          * base_fsp we already opened. Set up the
3824                          * base_fsp pointer.
3825                          */
3826                         fsp->base_fsp = base_fsp;
3827                 }
3828
3829                 if (allocation_size) {
3830                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3831                                                         allocation_size);
3832                 }
3833
3834                 status = open_file_ntcreate(conn,
3835                                             req,
3836                                             access_mask,
3837                                             share_access,
3838                                             create_disposition,
3839                                             create_options,
3840                                             file_attributes,
3841                                             oplock_request,
3842                                             private_flags,
3843                                             &info,
3844                                             fsp);
3845
3846                 if(!NT_STATUS_IS_OK(status)) {
3847                         file_free(req, fsp);
3848                         fsp = NULL;
3849                 }
3850
3851                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3852
3853                         /* A stream open never opens a directory */
3854
3855                         if (base_fsp) {
3856                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3857                                 goto fail;
3858                         }
3859
3860                         /*
3861                          * Fail the open if it was explicitly a non-directory
3862                          * file.
3863                          */
3864
3865                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3866                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3867                                 goto fail;
3868                         }
3869
3870                         oplock_request = 0;
3871                         status = open_directory(
3872                                 conn, req, smb_fname, access_mask,
3873                                 share_access, create_disposition,
3874                                 create_options, file_attributes,
3875                                 &info, &fsp);
3876                 }
3877         }
3878
3879         if (!NT_STATUS_IS_OK(status)) {
3880                 goto fail;
3881         }
3882
3883         fsp->base_fsp = base_fsp;
3884
3885         if ((ea_list != NULL) &&
3886             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3887                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3888                 if (!NT_STATUS_IS_OK(status)) {
3889                         goto fail;
3890                 }
3891         }
3892
3893         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3894                 status = NT_STATUS_ACCESS_DENIED;
3895                 goto fail;
3896         }
3897
3898         /* Save the requested allocation size. */
3899         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3900                 if (allocation_size
3901                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3902                         fsp->initial_allocation_size = smb_roundup(
3903                                 fsp->conn, allocation_size);
3904                         if (fsp->is_directory) {
3905                                 /* Can't set allocation size on a directory. */
3906                                 status = NT_STATUS_ACCESS_DENIED;
3907                                 goto fail;
3908                         }
3909                         if (vfs_allocate_file_space(
3910                                     fsp, fsp->initial_allocation_size) == -1) {
3911                                 status = NT_STATUS_DISK_FULL;
3912                                 goto fail;
3913                         }
3914                 } else {
3915                         fsp->initial_allocation_size = smb_roundup(
3916                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3917                 }
3918         } else {
3919                 fsp->initial_allocation_size = 0;
3920         }
3921
3922         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3923                                 fsp->base_fsp == NULL) {
3924                 if (sd != NULL) {
3925                         /*
3926                          * According to the MS documentation, the only time the security
3927                          * descriptor is applied to the opened file is iff we *created* the
3928                          * file; an existing file stays the same.
3929                          *
3930                          * Also, it seems (from observation) that you can open the file with
3931                          * any access mask but you can still write the sd. We need to override
3932                          * the granted access before we call set_sd
3933                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3934                          */
3935
3936                         uint32_t sec_info_sent;
3937                         uint32_t saved_access_mask = fsp->access_mask;
3938
3939                         sec_info_sent = get_sec_info(sd);
3940
3941                         fsp->access_mask = FILE_GENERIC_ALL;
3942
3943                         if (sec_info_sent & (SECINFO_OWNER|
3944                                                 SECINFO_GROUP|
3945                                                 SECINFO_DACL|
3946                                                 SECINFO_SACL)) {
3947                                 status = set_sd(fsp, sd, sec_info_sent);
3948                         }
3949
3950                         fsp->access_mask = saved_access_mask;
3951
3952                         if (!NT_STATUS_IS_OK(status)) {
3953                                 goto fail;
3954                         }
3955                 } else if (lp_inherit_acls(SNUM(conn))) {
3956                         /* Inherit from parent. Errors here are not fatal. */
3957                         status = inherit_new_acl(fsp);
3958                         if (!NT_STATUS_IS_OK(status)) {
3959                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3960                                         fsp_str_dbg(fsp),
3961                                         nt_errstr(status) ));
3962                         }
3963                 }
3964         }
3965
3966         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3967
3968         *result = fsp;
3969         if (pinfo != NULL) {
3970                 *pinfo = info;
3971         }
3972
3973         smb_fname->st = fsp->fsp_name->st;
3974
3975         return NT_STATUS_OK;
3976
3977  fail:
3978         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3979
3980         if (fsp != NULL) {
3981                 if (base_fsp && fsp->base_fsp == base_fsp) {
3982                         /*
3983                          * The close_file below will close
3984                          * fsp->base_fsp.
3985                          */
3986                         base_fsp = NULL;
3987                 }
3988                 close_file(req, fsp, ERROR_CLOSE);
3989                 fsp = NULL;
3990         }
3991         if (base_fsp != NULL) {
3992                 close_file(req, base_fsp, ERROR_CLOSE);
3993                 base_fsp = NULL;
3994         }
3995         return status;
3996 }
3997
3998 /*
3999  * Calculate the full path name given a relative fid.
4000  */
4001 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4002                                    struct smb_request *req,
4003                                    uint16_t root_dir_fid,
4004                                    const struct smb_filename *smb_fname,
4005                                    struct smb_filename **smb_fname_out)
4006 {
4007         files_struct *dir_fsp;
4008         char *parent_fname = NULL;
4009         char *new_base_name = NULL;
4010         NTSTATUS status;
4011
4012         if (root_dir_fid == 0 || !smb_fname) {
4013                 status = NT_STATUS_INTERNAL_ERROR;
4014                 goto out;
4015         }
4016
4017         dir_fsp = file_fsp(req, root_dir_fid);
4018
4019         if (dir_fsp == NULL) {
4020                 status = NT_STATUS_INVALID_HANDLE;
4021                 goto out;
4022         }
4023
4024         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4025                 status = NT_STATUS_INVALID_HANDLE;
4026                 goto out;
4027         }
4028
4029         if (!dir_fsp->is_directory) {
4030
4031                 /*
4032                  * Check to see if this is a mac fork of some kind.
4033                  */
4034
4035                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4036                     is_ntfs_stream_smb_fname(smb_fname)) {
4037                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4038                         goto out;
4039                 }
4040
4041                 /*
4042                   we need to handle the case when we get a
4043                   relative open relative to a file and the
4044                   pathname is blank - this is a reopen!
4045                   (hint from demyn plantenberg)
4046                 */
4047
4048                 status = NT_STATUS_INVALID_HANDLE;
4049                 goto out;
4050         }
4051
4052         if (ISDOT(dir_fsp->fsp_name->base_name)) {
4053                 /*
4054                  * We're at the toplevel dir, the final file name
4055                  * must not contain ./, as this is filtered out
4056                  * normally by srvstr_get_path and unix_convert
4057                  * explicitly rejects paths containing ./.
4058                  */
4059                 parent_fname = talloc_strdup(talloc_tos(), "");
4060                 if (parent_fname == NULL) {
4061                         status = NT_STATUS_NO_MEMORY;
4062                         goto out;
4063                 }
4064         } else {
4065                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4066
4067                 /*
4068                  * Copy in the base directory name.
4069                  */
4070
4071                 parent_fname = talloc_array(talloc_tos(), char,
4072                     dir_name_len+2);
4073                 if (parent_fname == NULL) {
4074                         status = NT_STATUS_NO_MEMORY;
4075                         goto out;
4076                 }
4077                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4078                     dir_name_len+1);
4079
4080                 /*
4081                  * Ensure it ends in a '/'.
4082                  * We used TALLOC_SIZE +2 to add space for the '/'.
4083                  */
4084
4085                 if(dir_name_len
4086                     && (parent_fname[dir_name_len-1] != '\\')
4087                     && (parent_fname[dir_name_len-1] != '/')) {
4088                         parent_fname[dir_name_len] = '/';
4089                         parent_fname[dir_name_len+1] = '\0';
4090                 }
4091         }
4092
4093         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4094                                         smb_fname->base_name);
4095         if (new_base_name == NULL) {
4096                 status = NT_STATUS_NO_MEMORY;
4097                 goto out;
4098         }
4099
4100         status = filename_convert(req,
4101                                 conn,
4102                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
4103                                 new_base_name,
4104                                 0,
4105                                 NULL,
4106                                 smb_fname_out);
4107         if (!NT_STATUS_IS_OK(status)) {
4108                 goto out;
4109         }
4110
4111  out:
4112         TALLOC_FREE(parent_fname);
4113         TALLOC_FREE(new_base_name);
4114         return status;
4115 }
4116
4117 NTSTATUS create_file_default(connection_struct *conn,
4118                              struct smb_request *req,
4119                              uint16_t root_dir_fid,
4120                              struct smb_filename *smb_fname,
4121                              uint32_t access_mask,
4122                              uint32_t share_access,
4123                              uint32_t create_disposition,
4124                              uint32_t create_options,
4125                              uint32_t file_attributes,
4126                              uint32_t oplock_request,
4127                              uint64_t allocation_size,
4128                              uint32_t private_flags,
4129                              struct security_descriptor *sd,
4130                              struct ea_list *ea_list,
4131                              files_struct **result,
4132                              int *pinfo)
4133 {
4134         int info = FILE_WAS_OPENED;
4135         files_struct *fsp = NULL;
4136         NTSTATUS status;
4137         bool stream_name = false;
4138
4139         DEBUG(10,("create_file: access_mask = 0x%x "
4140                   "file_attributes = 0x%x, share_access = 0x%x, "
4141                   "create_disposition = 0x%x create_options = 0x%x "
4142                   "oplock_request = 0x%x "
4143                   "private_flags = 0x%x "
4144                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4145                   "fname = %s\n",
4146                   (unsigned int)access_mask,
4147                   (unsigned int)file_attributes,
4148                   (unsigned int)share_access,
4149                   (unsigned int)create_disposition,
4150                   (unsigned int)create_options,
4151                   (unsigned int)oplock_request,
4152                   (unsigned int)private_flags,
4153                   (unsigned int)root_dir_fid,
4154                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4155
4156         /*
4157          * Calculate the filename from the root_dir_if if necessary.
4158          */
4159
4160         if (root_dir_fid != 0) {
4161                 struct smb_filename *smb_fname_out = NULL;
4162                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4163                                                    smb_fname, &smb_fname_out);
4164                 if (!NT_STATUS_IS_OK(status)) {
4165                         goto fail;
4166                 }
4167                 smb_fname = smb_fname_out;
4168         }
4169
4170         /*
4171          * Check to see if this is a mac fork of some kind.
4172          */
4173
4174         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4175         if (stream_name) {
4176                 enum FAKE_FILE_TYPE fake_file_type;
4177
4178                 fake_file_type = is_fake_file(smb_fname);
4179
4180                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4181
4182                         /*
4183                          * Here we go! support for changing the disk quotas
4184                          * --metze
4185                          *
4186                          * We need to fake up to open this MAGIC QUOTA file
4187                          * and return a valid FID.
4188                          *
4189                          * w2k close this file directly after openening xp
4190                          * also tries a QUERY_FILE_INFO on the file and then
4191                          * close it
4192                          */
4193                         status = open_fake_file(req, conn, req->vuid,
4194                                                 fake_file_type, smb_fname,
4195                                                 access_mask, &fsp);
4196                         if (!NT_STATUS_IS_OK(status)) {
4197                                 goto fail;
4198                         }
4199
4200                         ZERO_STRUCT(smb_fname->st);
4201                         goto done;
4202                 }
4203
4204                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4205                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4206                         goto fail;
4207                 }
4208         }
4209
4210         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4211                 int ret;
4212                 smb_fname->stream_name = NULL;
4213                 /* We have to handle this error here. */
4214                 if (create_options & FILE_DIRECTORY_FILE) {
4215                         status = NT_STATUS_NOT_A_DIRECTORY;
4216                         goto fail;
4217                 }
4218                 if (lp_posix_pathnames()) {
4219                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4220                 } else {
4221                         ret = SMB_VFS_STAT(conn, smb_fname);
4222                 }
4223
4224                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4225                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4226                         goto fail;
4227                 }
4228         }
4229
4230         status = create_file_unixpath(
4231                 conn, req, smb_fname, access_mask, share_access,
4232                 create_disposition, create_options, file_attributes,
4233                 oplock_request, allocation_size, private_flags,
4234                 sd, ea_list,
4235                 &fsp, &info);
4236
4237         if (!NT_STATUS_IS_OK(status)) {
4238                 goto fail;
4239         }
4240
4241  done:
4242         DEBUG(10, ("create_file: info=%d\n", info));
4243
4244         *result = fsp;
4245         if (pinfo != NULL) {
4246                 *pinfo = info;
4247         }
4248         return NT_STATUS_OK;
4249
4250  fail:
4251         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4252
4253         if (fsp != NULL) {
4254                 close_file(req, fsp, ERROR_CLOSE);
4255                 fsp = NULL;
4256         }
4257         return status;
4258 }