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