source3/smbd/open.c

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