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         bool first_open_attempt = true;
1933         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1934         mode_t new_unx_mode = (mode_t)0;
1935         mode_t unx_mode = (mode_t)0;
1936         int info;
1937         uint32 existing_dos_attributes = 0;
1938         struct timeval request_time = timeval_zero();
1939         struct share_mode_lock *lck = NULL;
1940         uint32 open_access_mask = access_mask;
1941         NTSTATUS status;
1942         char *parent_dir;
1943         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1944         struct share_mode_entry *batch_entry = NULL;
1945         struct share_mode_entry *exclusive_entry = NULL;
1946         bool got_level2_oplock = false;
1947         bool got_a_none_oplock = false;
1948         struct timespec old_write_time;
1949         struct file_id id;
1950
1951         if (conn->printer) {
1952                 /*
1953                  * Printers are handled completely differently.
1954                  * Most of the passed parameters are ignored.
1955                  */
1956
1957                 if (pinfo) {
1958                         *pinfo = FILE_WAS_CREATED;
1959                 }
1960
1961                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1962                            smb_fname_str_dbg(smb_fname)));
1963
1964                 if (!req) {
1965                         DEBUG(0,("open_file_ntcreate: printer open without "
1966                                 "an SMB request!\n"));
1967                         return NT_STATUS_INTERNAL_ERROR;
1968                 }
1969
1970                 return print_spool_open(fsp, smb_fname->base_name,
1971                                         req->vuid);
1972         }
1973
1974         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1975                             NULL)) {
1976                 return NT_STATUS_NO_MEMORY;
1977         }
1978
1979         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1980                 posix_open = True;
1981                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1982                 new_dos_attributes = 0;
1983         } else {
1984                 /* Windows allows a new file to be created and
1985                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1986                    sent by the client. Do the same. */
1987
1988                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1989
1990                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1991                  * created new. */
1992                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1993                                      smb_fname, parent_dir);
1994         }
1995
1996         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1997                    "access_mask=0x%x share_access=0x%x "
1998                    "create_disposition = 0x%x create_options=0x%x "
1999                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2000                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2001                    access_mask, share_access, create_disposition,
2002                    create_options, (unsigned int)unx_mode, oplock_request,
2003                    (unsigned int)private_flags));
2004
2005         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2006                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2007                 return NT_STATUS_INTERNAL_ERROR;
2008         }
2009
2010         /*
2011          * Only non-internal opens can be deferred at all
2012          */
2013
2014         if (req) {
2015                 void *ptr;
2016                 if (get_deferred_open_message_state(req,
2017                                 &request_time,
2018                                 &ptr)) {
2019                         /* Remember the absolute time of the original
2020                            request with this mid. We'll use it later to
2021                            see if this has timed out. */
2022
2023                         /* If it was an async create retry, the file
2024                            didn't exist. */
2025
2026                         if (is_deferred_open_async(ptr)) {
2027                                 SET_STAT_INVALID(smb_fname->st);
2028                                 file_existed = false;
2029                         } else {
2030                                 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
2031                                 /* Remove the deferred open entry under lock. */
2032                                 remove_deferred_open_entry(
2033                                         state->id, req->mid,
2034                                         messaging_server_id(req->sconn->msg_ctx));
2035                         }
2036
2037                         /* Ensure we don't reprocess this message. */
2038                         remove_deferred_open_message_smb(req->sconn, req->mid);
2039
2040                         first_open_attempt = false;
2041                 }
2042         }
2043
2044         if (!posix_open) {
2045                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2046                 if (file_existed) {
2047                         existing_dos_attributes = dos_mode(conn, smb_fname);
2048                 }
2049         }
2050
2051         /* ignore any oplock requests if oplocks are disabled */
2052         if (!lp_oplocks(SNUM(conn)) ||
2053             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2054                 /* Mask off everything except the private Samba bits. */
2055                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2056         }
2057
2058         /* this is for OS/2 long file names - say we don't support them */
2059         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2060                 /* OS/2 Workplace shell fix may be main code stream in a later
2061                  * release. */
2062                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2063                          "supported.\n"));
2064                 if (use_nt_status()) {
2065                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2066                 }
2067                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2068         }
2069
2070         switch( create_disposition ) {
2071                 case FILE_OPEN:
2072                         /* If file exists open. If file doesn't exist error. */
2073                         if (!file_existed) {
2074                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2075                                          "requested for file %s and file "
2076                                          "doesn't exist.\n",
2077                                          smb_fname_str_dbg(smb_fname)));
2078                                 errno = ENOENT;
2079                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2080                         }
2081                         break;
2082
2083                 case FILE_OVERWRITE:
2084                         /* If file exists overwrite. If file doesn't exist
2085                          * error. */
2086                         if (!file_existed) {
2087                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2088                                          "requested for file %s and file "
2089                                          "doesn't exist.\n",
2090                                          smb_fname_str_dbg(smb_fname) ));
2091                                 errno = ENOENT;
2092                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2093                         }
2094                         break;
2095
2096                 case FILE_CREATE:
2097                         /* If file exists error. If file doesn't exist
2098                          * create. */
2099                         if (file_existed) {
2100                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2101                                          "requested for file %s and file "
2102                                          "already exists.\n",
2103                                          smb_fname_str_dbg(smb_fname)));
2104                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2105                                         errno = EISDIR;
2106                                 } else {
2107                                         errno = EEXIST;
2108                                 }
2109                                 return map_nt_error_from_unix(errno);
2110                         }
2111                         break;
2112
2113                 case FILE_SUPERSEDE:
2114                 case FILE_OVERWRITE_IF:
2115                 case FILE_OPEN_IF:
2116                         break;
2117                 default:
2118                         return NT_STATUS_INVALID_PARAMETER;
2119         }
2120
2121         flags2 = disposition_to_open_flags(create_disposition);
2122
2123         /* We only care about matching attributes on file exists and
2124          * overwrite. */
2125
2126         if (!posix_open && file_existed &&
2127             ((create_disposition == FILE_OVERWRITE) ||
2128              (create_disposition == FILE_OVERWRITE_IF))) {
2129                 if (!open_match_attributes(conn, existing_dos_attributes,
2130                                            new_dos_attributes,
2131                                            smb_fname->st.st_ex_mode,
2132                                            unx_mode, &new_unx_mode)) {
2133                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2134                                  "for file %s (%x %x) (0%o, 0%o)\n",
2135                                  smb_fname_str_dbg(smb_fname),
2136                                  existing_dos_attributes,
2137                                  new_dos_attributes,
2138                                  (unsigned int)smb_fname->st.st_ex_mode,
2139                                  (unsigned int)unx_mode ));
2140                         errno = EACCES;
2141                         return NT_STATUS_ACCESS_DENIED;
2142                 }
2143         }
2144
2145         status = smbd_calculate_access_mask(conn, smb_fname,
2146                                         false,
2147                                         access_mask,
2148                                         &access_mask);
2149         if (!NT_STATUS_IS_OK(status)) {
2150                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2151                         "on file %s returned %s\n",
2152                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2153                 return status;
2154         }
2155
2156         open_access_mask = access_mask;
2157
2158         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2159                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2160         }
2161
2162         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2163                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2164                     access_mask));
2165
2166         /*
2167          * Note that we ignore the append flag as append does not
2168          * mean the same thing under DOS and Unix.
2169          */
2170
2171         flags = calculate_open_access_flags(access_mask, oplock_request,
2172                                             private_flags);
2173
2174         /*
2175          * Currently we only look at FILE_WRITE_THROUGH for create options.
2176          */
2177
2178 #if defined(O_SYNC)
2179         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2180                 flags2 |= O_SYNC;
2181         }
2182 #endif /* O_SYNC */
2183
2184         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2185                 flags2 |= O_APPEND;
2186         }
2187
2188         if (!posix_open && !CAN_WRITE(conn)) {
2189                 /*
2190                  * We should really return a permission denied error if either
2191                  * O_CREAT or O_TRUNC are set, but for compatibility with
2192                  * older versions of Samba we just AND them out.
2193                  */
2194                 flags2 &= ~(O_CREAT|O_TRUNC);
2195         }
2196
2197         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2198                 /*
2199                  * With kernel oplocks the open breaking an oplock
2200                  * blocks until the oplock holder has given up the
2201                  * oplock or closed the file. We prevent this by first
2202                  * trying to open the file with O_NONBLOCK (see "man
2203                  * fcntl" on Linux). For the second try, triggered by
2204                  * an oplock break response, we do not need this
2205                  * anymore.
2206                  *
2207                  * This is true under the assumption that only Samba
2208                  * requests kernel oplocks. Once someone else like
2209                  * NFSv4 starts to use that API, we will have to
2210                  * modify this by communicating with the NFSv4 server.
2211                  */
2212                 flags2 |= O_NONBLOCK;
2213         }
2214
2215         /*
2216          * Ensure we can't write on a read-only share or file.
2217          */
2218
2219         if (flags != O_RDONLY && file_existed &&
2220             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2221                 DEBUG(5,("open_file_ntcreate: write access requested for "
2222                          "file %s on read only %s\n",
2223                          smb_fname_str_dbg(smb_fname),
2224                          !CAN_WRITE(conn) ? "share" : "file" ));
2225                 errno = EACCES;
2226                 return NT_STATUS_ACCESS_DENIED;
2227         }
2228
2229         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2230         fsp->share_access = share_access;
2231         fsp->fh->private_options = private_flags;
2232         fsp->access_mask = open_access_mask; /* We change this to the
2233                                               * requested access_mask after
2234                                               * the open is done. */
2235         fsp->posix_open = posix_open;
2236
2237         /* Ensure no SAMBA_PRIVATE bits can be set. */
2238         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2239
2240         if (timeval_is_zero(&request_time)) {
2241                 request_time = fsp->open_time;
2242         }
2243
2244         /*
2245          * Ensure we pay attention to default ACLs on directories if required.
2246          */
2247
2248         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2249             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2250                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2251         }
2252
2253         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2254                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2255                  (unsigned int)flags, (unsigned int)flags2,
2256                  (unsigned int)unx_mode, (unsigned int)access_mask,
2257                  (unsigned int)open_access_mask));
2258
2259         fsp_open = open_file(fsp, conn, req, parent_dir,
2260                              flags|flags2, unx_mode, access_mask,
2261                              open_access_mask, &new_file_created);
2262
2263         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2264                 struct deferred_open_record state;
2265
2266                 /*
2267                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2268                  */
2269                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2270                         DEBUG(10, ("FIFO busy\n"));
2271                         return NT_STATUS_NETWORK_BUSY;
2272                 }
2273                 if (req == NULL) {
2274                         DEBUG(10, ("Internal open busy\n"));
2275                         return NT_STATUS_NETWORK_BUSY;
2276                 }
2277
2278                 /*
2279                  * From here on we assume this is an oplock break triggered
2280                  */
2281
2282                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2283                 if (lck == NULL) {
2284                         state.delayed_for_oplocks = false;
2285                         state.async_open = false;
2286                         state.id = fsp->file_id;
2287                         defer_open(NULL, request_time, timeval_set(0, 0),
2288                                    req, &state);
2289                         DEBUG(10, ("No share mode lock found after "
2290                                    "EWOULDBLOCK, retrying sync\n"));
2291                         return NT_STATUS_SHARING_VIOLATION;
2292                 }
2293
2294                 find_oplock_types(fsp, 0, lck, &batch_entry, &exclusive_entry,
2295                                   &got_level2_oplock, &got_a_none_oplock);
2296
2297                 if (delay_for_batch_oplocks(fsp, req->mid, 0, batch_entry) ||
2298                     delay_for_exclusive_oplocks(fsp, req->mid, 0,
2299                                                 exclusive_entry)) {
2300                         schedule_defer_open(lck, request_time, req);
2301                         TALLOC_FREE(lck);
2302                         DEBUG(10, ("Sent oplock break request to kernel "
2303                                    "oplock holder\n"));
2304                         return NT_STATUS_SHARING_VIOLATION;
2305                 }
2306
2307                 /*
2308                  * No oplock from Samba around. Immediately retry with
2309                  * a blocking open.
2310                  */
2311                 state.delayed_for_oplocks = false;
2312                 state.async_open = false;
2313                 state.id = lck->data->id;
2314                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2315                 TALLOC_FREE(lck);
2316                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2317                            "Retrying sync\n"));
2318                 return NT_STATUS_SHARING_VIOLATION;
2319         }
2320
2321         if (!NT_STATUS_IS_OK(fsp_open)) {
2322                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2323                         schedule_async_open(request_time, req);
2324                 }
2325                 TALLOC_FREE(lck);
2326                 return fsp_open;
2327         }
2328
2329         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2330                 /*
2331                  * The file did exist, but some other (local or NFS)
2332                  * process either renamed/unlinked and re-created the
2333                  * file with different dev/ino after we walked the path,
2334                  * but before we did the open. We could retry the
2335                  * open but it's a rare enough case it's easier to
2336                  * just fail the open to prevent creating any problems
2337                  * in the open file db having the wrong dev/ino key.
2338                  */
2339                 TALLOC_FREE(lck);
2340                 fd_close(fsp);
2341                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2342                         "Old (dev=0x%llu, ino =0x%llu). "
2343                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2344                         " with NT_STATUS_ACCESS_DENIED.\n",
2345                          smb_fname_str_dbg(smb_fname),
2346                          (unsigned long long)saved_stat.st_ex_dev,
2347                          (unsigned long long)saved_stat.st_ex_ino,
2348                          (unsigned long long)smb_fname->st.st_ex_dev,
2349                          (unsigned long long)smb_fname->st.st_ex_ino));
2350                 return NT_STATUS_ACCESS_DENIED;
2351         }
2352
2353         old_write_time = smb_fname->st.st_ex_mtime;
2354
2355         /*
2356          * Deal with the race condition where two smbd's detect the
2357          * file doesn't exist and do the create at the same time. One
2358          * of them will win and set a share mode, the other (ie. this
2359          * one) should check if the requested share mode for this
2360          * create is allowed.
2361          */
2362
2363         /*
2364          * Now the file exists and fsp is successfully opened,
2365          * fsp->dev and fsp->inode are valid and should replace the
2366          * dev=0,inode=0 from a non existent file. Spotted by
2367          * Nadav Danieli <nadavd@exanet.com>. JRA.
2368          */
2369
2370         id = fsp->file_id;
2371
2372         lck = get_share_mode_lock(talloc_tos(), id,
2373                                   conn->connectpath,
2374                                   smb_fname, &old_write_time);
2375
2376         if (lck == NULL) {
2377                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2378                           "mode lock for %s\n",
2379                           smb_fname_str_dbg(smb_fname)));
2380                 fd_close(fsp);
2381                 return NT_STATUS_SHARING_VIOLATION;
2382         }
2383
2384         /* Get the types we need to examine. */
2385         find_oplock_types(fsp,
2386                           oplock_request,
2387                           lck,
2388                           &batch_entry,
2389                           &exclusive_entry,
2390                           &got_level2_oplock,
2391                           &got_a_none_oplock);
2392
2393         /* First pass - send break only on batch oplocks. */
2394         if ((req != NULL) &&
2395             delay_for_batch_oplocks(fsp,
2396                                     req->mid,
2397                                     oplock_request,
2398                                     batch_entry)) {
2399                 schedule_defer_open(lck, request_time, req);
2400                 TALLOC_FREE(lck);
2401                 fd_close(fsp);
2402                 return NT_STATUS_SHARING_VIOLATION;
2403         }
2404
2405         status = open_mode_check(conn, lck, fsp->name_hash,
2406                                  access_mask, share_access,
2407                                  create_options, &file_existed);
2408
2409         if (NT_STATUS_IS_OK(status)) {
2410                 /* We might be going to allow this open. Check oplock
2411                  * status again. */
2412                 /* Second pass - send break for both batch or
2413                  * exclusive oplocks. */
2414                 if ((req != NULL) &&
2415                     delay_for_exclusive_oplocks(
2416                             fsp,
2417                             req->mid,
2418                             oplock_request,
2419                             exclusive_entry)) {
2420                         schedule_defer_open(lck, request_time, req);
2421                         TALLOC_FREE(lck);
2422                         fd_close(fsp);
2423                         return NT_STATUS_SHARING_VIOLATION;
2424                 }
2425         }
2426
2427         if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2428                 /* DELETE_PENDING is not deferred for a second */
2429                 TALLOC_FREE(lck);
2430                 fd_close(fsp);
2431                 return status;
2432         }
2433
2434         if (!NT_STATUS_IS_OK(status)) {
2435                 uint32 can_access_mask;
2436                 bool can_access = True;
2437
2438                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2439
2440                 /* Check if this can be done with the deny_dos and fcb
2441                  * calls. */
2442                 if (private_flags &
2443                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2444                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2445                         if (req == NULL) {
2446                                 DEBUG(0, ("DOS open without an SMB "
2447                                           "request!\n"));
2448                                 TALLOC_FREE(lck);
2449                                 fd_close(fsp);
2450                                 return NT_STATUS_INTERNAL_ERROR;
2451                         }
2452
2453                         /* Use the client requested access mask here,
2454                          * not the one we open with. */
2455                         status = fcb_or_dos_open(req,
2456                                                  conn,
2457                                                  fsp,
2458                                                  smb_fname,
2459                                                  id,
2460                                                  req->smbpid,
2461                                                  req->vuid,
2462                                                  access_mask,
2463                                                  share_access,
2464                                                  create_options);
2465
2466                         if (NT_STATUS_IS_OK(status)) {
2467                                 TALLOC_FREE(lck);
2468                                 if (pinfo) {
2469                                         *pinfo = FILE_WAS_OPENED;
2470                                 }
2471                                 return NT_STATUS_OK;
2472                         }
2473                 }
2474
2475                 /*
2476                  * This next line is a subtlety we need for
2477                  * MS-Access. If a file open will fail due to share
2478                  * permissions and also for security (access) reasons,
2479                  * we need to return the access failed error, not the
2480                  * share error. We can't open the file due to kernel
2481                  * oplock deadlock (it's possible we failed above on
2482                  * the open_mode_check()) so use a userspace check.
2483                  */
2484
2485                 if (flags & O_RDWR) {
2486                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2487                 } else if (flags & O_WRONLY) {
2488                         can_access_mask = FILE_WRITE_DATA;
2489                 } else {
2490                         can_access_mask = FILE_READ_DATA;
2491                 }
2492
2493                 if (((can_access_mask & FILE_WRITE_DATA) &&
2494                      !CAN_WRITE(conn)) ||
2495                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2496                                                               smb_fname,
2497                                                               false,
2498                                                               can_access_mask))) {
2499                         can_access = False;
2500                 }
2501
2502                 /*
2503                  * If we're returning a share violation, ensure we
2504                  * cope with the braindead 1 second delay.
2505                  */
2506
2507                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2508                     lp_defer_sharing_violations()) {
2509                         struct timeval timeout;
2510                         struct deferred_open_record state;
2511                         int timeout_usecs;
2512
2513                         /* this is a hack to speed up torture tests
2514                            in 'make test' */
2515                         timeout_usecs = lp_parm_int(SNUM(conn),
2516                                                     "smbd","sharedelay",
2517                                                     SHARING_VIOLATION_USEC_WAIT);
2518
2519                         /* This is a relative time, added to the absolute
2520                            request_time value to get the absolute timeout time.
2521                            Note that if this is the second or greater time we enter
2522                            this codepath for this particular request mid then
2523                            request_time is left as the absolute time of the *first*
2524                            time this request mid was processed. This is what allows
2525                            the request to eventually time out. */
2526
2527                         timeout = timeval_set(0, timeout_usecs);
2528
2529                         /* Nothing actually uses state.delayed_for_oplocks
2530                            but it's handy to differentiate in debug messages
2531                            between a 30 second delay due to oplock break, and
2532                            a 1 second delay for share mode conflicts. */
2533
2534                         state.delayed_for_oplocks = False;
2535                         state.async_open = false;
2536                         state.id = id;
2537
2538                         if ((req != NULL)
2539                             && !request_timed_out(request_time,
2540                                                   timeout)) {
2541                                 defer_open(lck, request_time, timeout,
2542                                            req, &state);
2543                         }
2544                 }
2545
2546                 TALLOC_FREE(lck);
2547                 fd_close(fsp);
2548                 if (can_access) {
2549                         /*
2550                          * We have detected a sharing violation here
2551                          * so return the correct error code
2552                          */
2553                         status = NT_STATUS_SHARING_VIOLATION;
2554                 } else {
2555                         status = NT_STATUS_ACCESS_DENIED;
2556                 }
2557                 return status;
2558         }
2559
2560         grant_fsp_oplock_type(fsp,
2561                               oplock_request,
2562                               got_level2_oplock,
2563                               got_a_none_oplock);
2564
2565         /*
2566          * We have the share entry *locked*.....
2567          */
2568
2569         /* Delete streams if create_disposition requires it */
2570         if (!new_file_created && clear_ads(create_disposition) &&
2571             !is_ntfs_stream_smb_fname(smb_fname)) {
2572                 status = delete_all_streams(conn, smb_fname->base_name);
2573                 if (!NT_STATUS_IS_OK(status)) {
2574                         TALLOC_FREE(lck);
2575                         fd_close(fsp);
2576                         return status;
2577                 }
2578         }
2579
2580         /* note that we ignore failure for the following. It is
2581            basically a hack for NFS, and NFS will never set one of
2582            these only read them. Nobody but Samba can ever set a deny
2583            mode and we have already checked our more authoritative
2584            locking database for permission to set this deny mode. If
2585            the kernel refuses the operations then the kernel is wrong.
2586            note that GPFS supports it as well - jmcd */
2587
2588         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2589                 int ret_flock;
2590                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2591                 if(ret_flock == -1 ){
2592
2593                         TALLOC_FREE(lck);
2594                         fd_close(fsp);
2595
2596                         return NT_STATUS_SHARING_VIOLATION;
2597                 }
2598         }
2599
2600         /*
2601          * At this point onwards, we can guarantee that the share entry
2602          * is locked, whether we created the file or not, and that the
2603          * deny mode is compatible with all current opens.
2604          */
2605
2606         /*
2607          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2608          * but we don't have to store this - just ignore it on access check.
2609          */
2610         if (conn->sconn->using_smb2) {
2611                 /*
2612                  * SMB2 doesn't return it (according to Microsoft tests).
2613                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2614                  * File created with access = 0x7 (Read, Write, Delete)
2615                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2616                  */
2617                 fsp->access_mask = access_mask;
2618         } else {
2619                 /* But SMB1 does. */
2620                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2621         }
2622
2623         if (file_existed) {
2624                 /* stat opens on existing files don't get oplocks. */
2625                 if (is_stat_open(open_access_mask)) {
2626                         fsp->oplock_type = NO_OPLOCK;
2627                 }
2628         }
2629
2630         if (new_file_created) {
2631                 info = FILE_WAS_CREATED;
2632         } else {
2633                 if (flags2 & O_TRUNC) {
2634                         info = FILE_WAS_OVERWRITTEN;
2635                 } else {
2636                         info = FILE_WAS_OPENED;
2637                 }
2638         }
2639
2640         if (pinfo) {
2641                 *pinfo = info;
2642         }
2643
2644         /*
2645          * Setup the oplock info in both the shared memory and
2646          * file structs.
2647          */
2648
2649         status = set_file_oplock(fsp, fsp->oplock_type);
2650         if (!NT_STATUS_IS_OK(status)) {
2651                 /*
2652                  * Could not get the kernel oplock or there are byte-range
2653                  * locks on the file.
2654                  */
2655                 fsp->oplock_type = NO_OPLOCK;
2656         }
2657
2658         set_share_mode(lck, fsp, get_current_uid(conn),
2659                         req ? req->mid : 0,
2660                        fsp->oplock_type);
2661
2662         /* Handle strange delete on close create semantics. */
2663         if (create_options & FILE_DELETE_ON_CLOSE) {
2664
2665                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2666
2667                 if (!NT_STATUS_IS_OK(status)) {
2668                         /* Remember to delete the mode we just added. */
2669                         del_share_mode(lck, fsp);
2670                         TALLOC_FREE(lck);
2671                         fd_close(fsp);
2672                         return status;
2673                 }
2674                 /* Note that here we set the *inital* delete on close flag,
2675                    not the regular one. The magic gets handled in close. */
2676                 fsp->initial_delete_on_close = True;
2677         }
2678
2679         if (info != FILE_WAS_OPENED) {
2680                 /* Files should be initially set as archive */
2681                 if (lp_map_archive(SNUM(conn)) ||
2682                     lp_store_dos_attributes(SNUM(conn))) {
2683                         if (!posix_open) {
2684                                 if (file_set_dosmode(conn, smb_fname,
2685                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2686                                             parent_dir, true) == 0) {
2687                                         unx_mode = smb_fname->st.st_ex_mode;
2688                                 }
2689                         }
2690                 }
2691         }
2692
2693         /* Determine sparse flag. */
2694         if (posix_open) {
2695                 /* POSIX opens are sparse by default. */
2696                 fsp->is_sparse = true;
2697         } else {
2698                 fsp->is_sparse = (file_existed &&
2699                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2700         }
2701
2702         /*
2703          * Take care of inherited ACLs on created files - if default ACL not
2704          * selected.
2705          */
2706
2707         if (!posix_open && new_file_created && !def_acl) {
2708
2709                 int saved_errno = errno; /* We might get ENOSYS in the next
2710                                           * call.. */
2711
2712                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2713                     errno == ENOSYS) {
2714                         errno = saved_errno; /* Ignore ENOSYS */
2715                 }
2716
2717         } else if (new_unx_mode) {
2718
2719                 int ret = -1;
2720
2721                 /* Attributes need changing. File already existed. */
2722
2723                 {
2724                         int saved_errno = errno; /* We might get ENOSYS in the
2725                                                   * next call.. */
2726                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2727
2728                         if (ret == -1 && errno == ENOSYS) {
2729                                 errno = saved_errno; /* Ignore ENOSYS */
2730                         } else {
2731                                 DEBUG(5, ("open_file_ntcreate: reset "
2732                                           "attributes of file %s to 0%o\n",
2733                                           smb_fname_str_dbg(smb_fname),
2734                                           (unsigned int)new_unx_mode));
2735                                 ret = 0; /* Don't do the fchmod below. */
2736                         }
2737                 }
2738
2739                 if ((ret == -1) &&
2740                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2741                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2742                                   "attributes of file %s to 0%o\n",
2743                                   smb_fname_str_dbg(smb_fname),
2744                                   (unsigned int)new_unx_mode));
2745         }
2746
2747         /* If this is a successful open, we must remove any deferred open
2748          * records. */
2749         if (req != NULL) {
2750                 del_deferred_open_entry(lck, req->mid,
2751                                         messaging_server_id(req->sconn->msg_ctx));
2752         }
2753         TALLOC_FREE(lck);
2754
2755         return NT_STATUS_OK;
2756 }
2757
2758
2759 /****************************************************************************
2760  Open a file for for write to ensure that we can fchmod it.
2761 ****************************************************************************/
2762
2763 NTSTATUS open_file_fchmod(connection_struct *conn,
2764                           struct smb_filename *smb_fname,
2765                           files_struct **result)
2766 {
2767         if (!VALID_STAT(smb_fname->st)) {
2768                 return NT_STATUS_INVALID_PARAMETER;
2769         }
2770
2771         return SMB_VFS_CREATE_FILE(
2772                 conn,                                   /* conn */
2773                 NULL,                                   /* req */
2774                 0,                                      /* root_dir_fid */
2775                 smb_fname,                              /* fname */
2776                 FILE_WRITE_DATA,                        /* access_mask */
2777                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2778                     FILE_SHARE_DELETE),
2779                 FILE_OPEN,                              /* create_disposition*/
2780                 0,                                      /* create_options */
2781                 0,                                      /* file_attributes */
2782                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2783                 0,                                      /* allocation_size */
2784                 0,                                      /* private_flags */
2785                 NULL,                                   /* sd */
2786                 NULL,                                   /* ea_list */
2787                 result,                                 /* result */
2788                 NULL);                                  /* pinfo */
2789 }
2790
2791 static NTSTATUS mkdir_internal(connection_struct *conn,
2792                                struct smb_filename *smb_dname,
2793                                uint32 file_attributes)
2794 {
2795         mode_t mode;
2796         char *parent_dir = NULL;
2797         NTSTATUS status;
2798         bool posix_open = false;
2799         bool need_re_stat = false;
2800         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2801
2802         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2803                 DEBUG(5,("mkdir_internal: failing share access "
2804                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2805                 return NT_STATUS_ACCESS_DENIED;
2806         }
2807
2808         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2809                             NULL)) {
2810                 return NT_STATUS_NO_MEMORY;
2811         }
2812
2813         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2814                 posix_open = true;
2815                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2816         } else {
2817                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2818         }
2819
2820         status = check_parent_access(conn,
2821                                         smb_dname,
2822                                         access_mask);
2823         if(!NT_STATUS_IS_OK(status)) {
2824                 DEBUG(5,("mkdir_internal: check_parent_access "
2825                         "on directory %s for path %s returned %s\n",
2826                         parent_dir,
2827                         smb_dname->base_name,
2828                         nt_errstr(status) ));
2829                 return status;
2830         }
2831
2832         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2833                 return map_nt_error_from_unix(errno);
2834         }
2835
2836         /* Ensure we're checking for a symlink here.... */
2837         /* We don't want to get caught by a symlink racer. */
2838
2839         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2840                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2841                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2842                 return map_nt_error_from_unix(errno);
2843         }
2844
2845         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2846                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2847                           smb_fname_str_dbg(smb_dname)));
2848                 return NT_STATUS_NOT_A_DIRECTORY;
2849         }
2850
2851         if (lp_store_dos_attributes(SNUM(conn))) {
2852                 if (!posix_open) {
2853                         file_set_dosmode(conn, smb_dname,
2854                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2855                                          parent_dir, true);
2856                 }
2857         }
2858
2859         if (lp_inherit_perms(SNUM(conn))) {
2860                 inherit_access_posix_acl(conn, parent_dir,
2861                                          smb_dname->base_name, mode);
2862                 need_re_stat = true;
2863         }
2864
2865         if (!posix_open) {
2866                 /*
2867                  * Check if high bits should have been set,
2868                  * then (if bits are missing): add them.
2869                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2870                  * dir.
2871                  */
2872                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2873                     (mode & ~smb_dname->st.st_ex_mode)) {
2874                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2875                                       (smb_dname->st.st_ex_mode |
2876                                           (mode & ~smb_dname->st.st_ex_mode)));
2877                         need_re_stat = true;
2878                 }
2879         }
2880
2881         /* Change the owner if required. */
2882         if (lp_inherit_owner(SNUM(conn))) {
2883                 change_dir_owner_to_parent(conn, parent_dir,
2884                                            smb_dname->base_name,
2885                                            &smb_dname->st);
2886                 need_re_stat = true;
2887         }
2888
2889         if (need_re_stat) {
2890                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2891                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2892                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2893                         return map_nt_error_from_unix(errno);
2894                 }
2895         }
2896
2897         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2898                      smb_dname->base_name);
2899
2900         return NT_STATUS_OK;
2901 }
2902
2903 /****************************************************************************
2904  Open a directory from an NT SMB call.
2905 ****************************************************************************/
2906
2907 static NTSTATUS open_directory(connection_struct *conn,
2908                                struct smb_request *req,
2909                                struct smb_filename *smb_dname,
2910                                uint32 access_mask,
2911                                uint32 share_access,
2912                                uint32 create_disposition,
2913                                uint32 create_options,
2914                                uint32 file_attributes,
2915                                int *pinfo,
2916                                files_struct **result)
2917 {
2918         files_struct *fsp = NULL;
2919         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2920         struct share_mode_lock *lck = NULL;
2921         NTSTATUS status;
2922         struct timespec mtimespec;
2923         int info = 0;
2924
2925         if (is_ntfs_stream_smb_fname(smb_dname)) {
2926                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2927                           smb_fname_str_dbg(smb_dname)));
2928                 return NT_STATUS_NOT_A_DIRECTORY;
2929         }
2930
2931         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2932                 /* Ensure we have a directory attribute. */
2933                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2934         }
2935
2936         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2937                  "share_access = 0x%x create_options = 0x%x, "
2938                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2939                  smb_fname_str_dbg(smb_dname),
2940                  (unsigned int)access_mask,
2941                  (unsigned int)share_access,
2942                  (unsigned int)create_options,
2943                  (unsigned int)create_disposition,
2944                  (unsigned int)file_attributes));
2945
2946         status = smbd_calculate_access_mask(conn, smb_dname, false,
2947                                             access_mask, &access_mask);
2948         if (!NT_STATUS_IS_OK(status)) {
2949                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2950                         "on file %s returned %s\n",
2951                         smb_fname_str_dbg(smb_dname),
2952                         nt_errstr(status)));
2953                 return status;
2954         }
2955
2956         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2957                         !security_token_has_privilege(get_current_nttok(conn),
2958                                         SEC_PRIV_SECURITY)) {
2959                 DEBUG(10, ("open_directory: open on %s "
2960                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2961                         smb_fname_str_dbg(smb_dname)));
2962                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2963         }
2964
2965         switch( create_disposition ) {
2966                 case FILE_OPEN:
2967
2968                         if (!dir_existed) {
2969                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2970                         }
2971
2972                         info = FILE_WAS_OPENED;
2973                         break;
2974
2975                 case FILE_CREATE:
2976
2977                         /* If directory exists error. If directory doesn't
2978                          * exist create. */
2979
2980                         if (dir_existed) {
2981                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2982                                 DEBUG(2, ("open_directory: unable to create "
2983                                           "%s. Error was %s\n",
2984                                           smb_fname_str_dbg(smb_dname),
2985                                           nt_errstr(status)));
2986                                 return status;
2987                         }
2988
2989                         status = mkdir_internal(conn, smb_dname,
2990                                                 file_attributes);
2991
2992                         if (!NT_STATUS_IS_OK(status)) {
2993                                 DEBUG(2, ("open_directory: unable to create "
2994                                           "%s. Error was %s\n",
2995                                           smb_fname_str_dbg(smb_dname),
2996                                           nt_errstr(status)));
2997                                 return status;
2998                         }
2999
3000                         info = FILE_WAS_CREATED;
3001                         break;
3002
3003                 case FILE_OPEN_IF:
3004                         /*
3005                          * If directory exists open. If directory doesn't
3006                          * exist create.
3007                          */
3008
3009                         if (dir_existed) {
3010                                 status = NT_STATUS_OK;
3011                                 info = FILE_WAS_OPENED;
3012                         } else {
3013                                 status = mkdir_internal(conn, smb_dname,
3014                                                 file_attributes);
3015
3016                                 if (NT_STATUS_IS_OK(status)) {
3017                                         info = FILE_WAS_CREATED;
3018                                 } else {
3019                                         /* Cope with create race. */
3020                                         if (!NT_STATUS_EQUAL(status,
3021                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3022                                                 DEBUG(2, ("open_directory: unable to create "
3023                                                         "%s. Error was %s\n",
3024                                                         smb_fname_str_dbg(smb_dname),
3025                                                         nt_errstr(status)));
3026                                                 return status;
3027                                         }
3028                                         info = FILE_WAS_OPENED;
3029                                 }
3030                         }
3031
3032                         break;
3033
3034                 case FILE_SUPERSEDE:
3035                 case FILE_OVERWRITE:
3036                 case FILE_OVERWRITE_IF:
3037                 default:
3038                         DEBUG(5,("open_directory: invalid create_disposition "
3039                                  "0x%x for directory %s\n",
3040                                  (unsigned int)create_disposition,
3041                                  smb_fname_str_dbg(smb_dname)));
3042                         return NT_STATUS_INVALID_PARAMETER;
3043         }
3044
3045         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3046                 DEBUG(5,("open_directory: %s is not a directory !\n",
3047                          smb_fname_str_dbg(smb_dname)));
3048                 return NT_STATUS_NOT_A_DIRECTORY;
3049         }
3050
3051         if (info == FILE_WAS_OPENED) {
3052                 status = smbd_check_access_rights(conn,
3053                                                 smb_dname,
3054                                                 false,
3055                                                 access_mask);
3056                 if (!NT_STATUS_IS_OK(status)) {
3057                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3058                                 "file %s failed with %s\n",
3059                                 smb_fname_str_dbg(smb_dname),
3060                                 nt_errstr(status)));
3061                         return status;
3062                 }
3063         }
3064
3065         status = file_new(req, conn, &fsp);
3066         if(!NT_STATUS_IS_OK(status)) {
3067                 return status;
3068         }
3069
3070         /*
3071          * Setup the files_struct for it.
3072          */
3073
3074         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3075         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3076         fsp->file_pid = req ? req->smbpid : 0;
3077         fsp->can_lock = False;
3078         fsp->can_read = False;
3079         fsp->can_write = False;
3080
3081         fsp->share_access = share_access;
3082         fsp->fh->private_options = 0;
3083         /*
3084          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3085          */
3086         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3087         fsp->print_file = NULL;
3088         fsp->modified = False;
3089         fsp->oplock_type = NO_OPLOCK;
3090         fsp->sent_oplock_break = NO_BREAK_SENT;
3091         fsp->is_directory = True;
3092         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3093         status = fsp_set_smb_fname(fsp, smb_dname);
3094         if (!NT_STATUS_IS_OK(status)) {
3095                 file_free(req, fsp);
3096                 return status;
3097         }
3098
3099         mtimespec = smb_dname->st.st_ex_mtime;
3100
3101 #ifdef O_DIRECTORY
3102         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3103 #else
3104         /* POSIX allows us to open a directory with O_RDONLY. */
3105         status = fd_open(conn, fsp, O_RDONLY, 0);
3106 #endif
3107         if (!NT_STATUS_IS_OK(status)) {
3108                 DEBUG(5, ("open_directory: Could not open fd for "
3109                         "%s (%s)\n",
3110                         smb_fname_str_dbg(smb_dname),
3111                         nt_errstr(status)));
3112                 file_free(req, fsp);
3113                 return status;
3114         }
3115
3116         status = vfs_stat_fsp(fsp);
3117         if (!NT_STATUS_IS_OK(status)) {
3118                 fd_close(fsp);
3119                 file_free(req, fsp);
3120                 return status;
3121         }
3122
3123         /* Ensure there was no race condition. */
3124         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3125                 DEBUG(5,("open_directory: stat struct differs for "
3126                         "directory %s.\n",
3127                         smb_fname_str_dbg(smb_dname)));
3128                 fd_close(fsp);
3129                 file_free(req, fsp);
3130                 return NT_STATUS_ACCESS_DENIED;
3131         }
3132
3133         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3134                                   conn->connectpath, smb_dname,
3135                                   &mtimespec);
3136
3137         if (lck == NULL) {
3138                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3139                           "%s\n", smb_fname_str_dbg(smb_dname)));
3140                 fd_close(fsp);
3141                 file_free(req, fsp);
3142                 return NT_STATUS_SHARING_VIOLATION;
3143         }
3144
3145         status = open_mode_check(conn, lck, fsp->name_hash,
3146                                 access_mask, share_access,
3147                                  create_options, &dir_existed);
3148
3149         if (!NT_STATUS_IS_OK(status)) {
3150                 TALLOC_FREE(lck);
3151                 fd_close(fsp);
3152                 file_free(req, fsp);
3153                 return status;
3154         }
3155
3156         set_share_mode(lck, fsp, get_current_uid(conn),
3157                         req ? req->mid : 0, NO_OPLOCK);
3158
3159         /* For directories the delete on close bit at open time seems
3160            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3161         if (create_options & FILE_DELETE_ON_CLOSE) {
3162                 status = can_set_delete_on_close(fsp, 0);
3163                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3164                         TALLOC_FREE(lck);
3165                         fd_close(fsp);
3166                         file_free(req, fsp);
3167                         return status;
3168                 }
3169
3170                 if (NT_STATUS_IS_OK(status)) {
3171                         /* Note that here we set the *inital* delete on close flag,
3172                            not the regular one. The magic gets handled in close. */
3173                         fsp->initial_delete_on_close = True;
3174                 }
3175         }
3176
3177         TALLOC_FREE(lck);
3178
3179         if (pinfo) {
3180                 *pinfo = info;
3181         }
3182
3183         *result = fsp;
3184         return NT_STATUS_OK;
3185 }
3186
3187 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3188                           struct smb_filename *smb_dname)
3189 {
3190         NTSTATUS status;
3191         files_struct *fsp;
3192
3193         status = SMB_VFS_CREATE_FILE(
3194                 conn,                                   /* conn */
3195                 req,                                    /* req */
3196                 0,                                      /* root_dir_fid */
3197                 smb_dname,                              /* fname */
3198                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3199                 FILE_SHARE_NONE,                        /* share_access */
3200                 FILE_CREATE,                            /* create_disposition*/
3201                 FILE_DIRECTORY_FILE,                    /* create_options */
3202                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3203                 0,                                      /* oplock_request */
3204                 0,                                      /* allocation_size */
3205                 0,                                      /* private_flags */
3206                 NULL,                                   /* sd */
3207                 NULL,                                   /* ea_list */
3208                 &fsp,                                   /* result */
3209                 NULL);                                  /* pinfo */
3210
3211         if (NT_STATUS_IS_OK(status)) {
3212                 close_file(req, fsp, NORMAL_CLOSE);
3213         }
3214
3215         return status;
3216 }
3217
3218 /****************************************************************************
3219  Receive notification that one of our open files has been renamed by another
3220  smbd process.
3221 ****************************************************************************/
3222
3223 void msg_file_was_renamed(struct messaging_context *msg,
3224                           void *private_data,
3225                           uint32_t msg_type,
3226                           struct server_id server_id,
3227                           DATA_BLOB *data)
3228 {
3229         files_struct *fsp;
3230         char *frm = (char *)data->data;
3231         struct file_id id;
3232         const char *sharepath;
3233         const char *base_name;
3234         const char *stream_name;
3235         struct smb_filename *smb_fname = NULL;
3236         size_t sp_len, bn_len;
3237         NTSTATUS status;
3238         struct smbd_server_connection *sconn =
3239                 talloc_get_type_abort(private_data,
3240                 struct smbd_server_connection);
3241
3242         if (data->data == NULL
3243             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3244                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3245                           (int)data->length));
3246                 return;
3247         }
3248
3249         /* Unpack the message. */
3250         pull_file_id_24(frm, &id);
3251         sharepath = &frm[24];
3252         sp_len = strlen(sharepath);
3253         base_name = sharepath + sp_len + 1;
3254         bn_len = strlen(base_name);
3255         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3256
3257         /* stream_name must always be NULL if there is no stream. */
3258         if (stream_name[0] == '\0') {
3259                 stream_name = NULL;
3260         }
3261
3262         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3263                                             stream_name, NULL, &smb_fname);
3264         if (!NT_STATUS_IS_OK(status)) {
3265                 return;
3266         }
3267
3268         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3269                 "file_id %s\n",
3270                 sharepath, smb_fname_str_dbg(smb_fname),
3271                 file_id_string_tos(&id)));
3272
3273         for(fsp = file_find_di_first(sconn, id); fsp;
3274             fsp = file_find_di_next(fsp)) {
3275                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3276
3277                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3278                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3279                                 smb_fname_str_dbg(smb_fname)));
3280                         status = fsp_set_smb_fname(fsp, smb_fname);
3281                         if (!NT_STATUS_IS_OK(status)) {
3282                                 goto out;
3283                         }
3284                 } else {
3285                         /* TODO. JRA. */
3286                         /* Now we have the complete path we can work out if this is
3287                            actually within this share and adjust newname accordingly. */
3288                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3289                                 "not sharepath %s) "
3290                                 "%s from %s -> %s\n",
3291                                 fsp->conn->connectpath,
3292                                 sharepath,
3293                                 fsp_fnum_dbg(fsp),
3294                                 fsp_str_dbg(fsp),
3295                                 smb_fname_str_dbg(smb_fname)));
3296                 }
3297         }
3298  out:
3299         TALLOC_FREE(smb_fname);
3300         return;
3301 }
3302
3303 /*
3304  * If a main file is opened for delete, all streams need to be checked for
3305  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3306  * If that works, delete them all by setting the delete on close and close.
3307  */
3308
3309 NTSTATUS open_streams_for_delete(connection_struct *conn,
3310                                         const char *fname)
3311 {
3312         struct stream_struct *stream_info = NULL;
3313         files_struct **streams = NULL;
3314         int i;
3315         unsigned int num_streams = 0;
3316         TALLOC_CTX *frame = talloc_stackframe();
3317         NTSTATUS status;
3318
3319         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3320                                 &num_streams, &stream_info);
3321
3322         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3323             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3324                 DEBUG(10, ("no streams around\n"));
3325                 TALLOC_FREE(frame);
3326                 return NT_STATUS_OK;
3327         }
3328
3329         if (!NT_STATUS_IS_OK(status)) {
3330                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3331                            nt_errstr(status)));
3332                 goto fail;
3333         }
3334
3335         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3336                    num_streams));
3337
3338         if (num_streams == 0) {
3339                 TALLOC_FREE(frame);
3340                 return NT_STATUS_OK;
3341         }
3342
3343         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3344         if (streams == NULL) {
3345                 DEBUG(0, ("talloc failed\n"));
3346                 status = NT_STATUS_NO_MEMORY;
3347                 goto fail;
3348         }
3349
3350         for (i=0; i<num_streams; i++) {
3351                 struct smb_filename *smb_fname = NULL;
3352
3353                 if (strequal(stream_info[i].name, "::$DATA")) {
3354                         streams[i] = NULL;
3355                         continue;
3356                 }
3357
3358                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3359                                                     stream_info[i].name,
3360                                                     NULL, &smb_fname);
3361                 if (!NT_STATUS_IS_OK(status)) {
3362                         goto fail;
3363                 }
3364
3365                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3366                         DEBUG(10, ("Unable to stat stream: %s\n",
3367                                    smb_fname_str_dbg(smb_fname)));
3368                 }
3369
3370                 status = SMB_VFS_CREATE_FILE(
3371                          conn,                  /* conn */
3372                          NULL,                  /* req */
3373                          0,                     /* root_dir_fid */
3374                          smb_fname,             /* fname */
3375                          DELETE_ACCESS,         /* access_mask */
3376                          (FILE_SHARE_READ |     /* share_access */
3377                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3378                          FILE_OPEN,             /* create_disposition*/
3379                          0,                     /* create_options */
3380                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3381                          0,                     /* oplock_request */
3382                          0,                     /* allocation_size */
3383                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3384                          NULL,                  /* sd */
3385                          NULL,                  /* ea_list */
3386                          &streams[i],           /* result */
3387                          NULL);                 /* pinfo */
3388
3389                 if (!NT_STATUS_IS_OK(status)) {
3390                         DEBUG(10, ("Could not open stream %s: %s\n",
3391                                    smb_fname_str_dbg(smb_fname),
3392                                    nt_errstr(status)));
3393
3394                         TALLOC_FREE(smb_fname);
3395                         break;
3396                 }
3397                 TALLOC_FREE(smb_fname);
3398         }
3399
3400         /*
3401          * don't touch the variable "status" beyond this point :-)
3402          */
3403
3404         for (i -= 1 ; i >= 0; i--) {
3405                 if (streams[i] == NULL) {
3406                         continue;
3407                 }
3408
3409                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3410                            fsp_str_dbg(streams[i])));
3411                 close_file(NULL, streams[i], NORMAL_CLOSE);
3412         }
3413
3414  fail:
3415         TALLOC_FREE(frame);
3416         return status;
3417 }
3418
3419 /*********************************************************************
3420  Create a default ACL by inheriting from the parent. If no inheritance
3421  from the parent available, don't set anything. This will leave the actual
3422  permissions the new file or directory already got from the filesystem
3423  as the NT ACL when read.
3424 *********************************************************************/
3425
3426 static NTSTATUS inherit_new_acl(files_struct *fsp)
3427 {
3428         TALLOC_CTX *ctx = talloc_tos();
3429         char *parent_name = NULL;
3430         struct security_descriptor *parent_desc = NULL;
3431         NTSTATUS status = NT_STATUS_OK;
3432         struct security_descriptor *psd = NULL;
3433         struct dom_sid *owner_sid = NULL;
3434         struct dom_sid *group_sid = NULL;
3435         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3436         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3437         bool inheritable_components = false;
3438         size_t size = 0;
3439         int orig_security_mask = 0;
3440         int orig_directory_security_mask = 0;
3441         int snum = SNUM(fsp->conn);
3442
3443         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3444                 return NT_STATUS_NO_MEMORY;
3445         }
3446
3447         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3448                                 parent_name,
3449                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3450                                 &parent_desc);
3451         if (!NT_STATUS_IS_OK(status)) {
3452                 return status;
3453         }
3454
3455         inheritable_components = sd_has_inheritable_components(parent_desc,
3456                                         fsp->is_directory);
3457
3458         if (!inheritable_components && !inherit_owner) {
3459                 /* Nothing to inherit and not setting owner. */
3460                 return NT_STATUS_OK;
3461         }
3462
3463         /* Create an inherited descriptor from the parent. */
3464
3465         if (DEBUGLEVEL >= 10) {
3466                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3467                         fsp_str_dbg(fsp) ));
3468                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3469         }
3470
3471         /* Inherit from parent descriptor if "inherit owner" set. */
3472         if (inherit_owner) {
3473                 owner_sid = parent_desc->owner_sid;
3474                 group_sid = parent_desc->group_sid;
3475         }
3476
3477         if (owner_sid == NULL) {
3478                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3479         }
3480         if (group_sid == NULL) {
3481                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3482         }
3483
3484         status = se_create_child_secdesc(ctx,
3485                         &psd,
3486                         &size,
3487                         parent_desc,
3488                         owner_sid,
3489                         group_sid,
3490                         fsp->is_directory);
3491         if (!NT_STATUS_IS_OK(status)) {
3492                 return status;
3493         }
3494
3495         /* If inheritable_components == false,
3496            se_create_child_secdesc()
3497            creates a security desriptor with a NULL dacl
3498            entry, but with SEC_DESC_DACL_PRESENT. We need
3499            to remove that flag. */
3500
3501         if (!inheritable_components) {
3502                 security_info_sent &= ~SECINFO_DACL;
3503                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3504         }
3505
3506         if (DEBUGLEVEL >= 10) {
3507                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3508                         fsp_str_dbg(fsp) ));
3509                 NDR_PRINT_DEBUG(security_descriptor, psd);
3510         }
3511
3512         /* Temporarily replace the security masks with the create masks,
3513            as we're actually doing a create here - we only call this
3514            when we've created a file or directory - but there's no
3515            way for FSET_NT_ACL to know the difference. */
3516
3517         orig_security_mask = lp_set_security_mask(snum, lp_create_mask(snum));
3518         orig_directory_security_mask = lp_set_directory_security_mask(snum, lp_dir_mask(snum));
3519
3520         if (inherit_owner) {
3521                 /* We need to be root to force this. */
3522                 become_root();
3523         }
3524         status = SMB_VFS_FSET_NT_ACL(fsp,
3525                         security_info_sent,
3526                         psd);
3527         if (inherit_owner) {
3528                 unbecome_root();
3529         }
3530
3531         (void)lp_set_security_mask(snum, orig_security_mask);
3532         (void)lp_set_directory_security_mask(snum, orig_directory_security_mask);
3533
3534         return status;
3535 }
3536
3537 /*
3538  * Wrapper around open_file_ntcreate and open_directory
3539  */
3540
3541 static NTSTATUS create_file_unixpath(connection_struct *conn,
3542                                      struct smb_request *req,
3543                                      struct smb_filename *smb_fname,
3544                                      uint32_t access_mask,
3545                                      uint32_t share_access,
3546                                      uint32_t create_disposition,
3547                                      uint32_t create_options,
3548                                      uint32_t file_attributes,
3549                                      uint32_t oplock_request,
3550                                      uint64_t allocation_size,
3551                                      uint32_t private_flags,
3552                                      struct security_descriptor *sd,
3553                                      struct ea_list *ea_list,
3554
3555                                      files_struct **result,
3556                                      int *pinfo)
3557 {
3558         int info = FILE_WAS_OPENED;
3559         files_struct *base_fsp = NULL;
3560         files_struct *fsp = NULL;
3561         NTSTATUS status;
3562
3563         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3564                   "file_attributes = 0x%x, share_access = 0x%x, "
3565                   "create_disposition = 0x%x create_options = 0x%x "
3566                   "oplock_request = 0x%x private_flags = 0x%x "
3567                   "ea_list = 0x%p, sd = 0x%p, "
3568                   "fname = %s\n",
3569                   (unsigned int)access_mask,
3570                   (unsigned int)file_attributes,
3571                   (unsigned int)share_access,
3572                   (unsigned int)create_disposition,
3573                   (unsigned int)create_options,
3574                   (unsigned int)oplock_request,
3575                   (unsigned int)private_flags,
3576                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3577
3578         if (create_options & FILE_OPEN_BY_FILE_ID) {
3579                 status = NT_STATUS_NOT_SUPPORTED;
3580                 goto fail;
3581         }
3582
3583         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3584                 status = NT_STATUS_INVALID_PARAMETER;
3585                 goto fail;
3586         }
3587
3588         if (req == NULL) {
3589                 oplock_request |= INTERNAL_OPEN_ONLY;
3590         }
3591
3592         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3593             && (access_mask & DELETE_ACCESS)
3594             && !is_ntfs_stream_smb_fname(smb_fname)) {
3595                 /*
3596                  * We can't open a file with DELETE access if any of the
3597                  * streams is open without FILE_SHARE_DELETE
3598                  */
3599                 status = open_streams_for_delete(conn, smb_fname->base_name);
3600
3601                 if (!NT_STATUS_IS_OK(status)) {
3602                         goto fail;
3603                 }
3604         }
3605
3606         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3607                         !security_token_has_privilege(get_current_nttok(conn),
3608                                         SEC_PRIV_SECURITY)) {
3609                 DEBUG(10, ("create_file_unixpath: open on %s "
3610                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3611                         smb_fname_str_dbg(smb_fname)));
3612                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3613                 goto fail;
3614         }
3615
3616         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3617             && is_ntfs_stream_smb_fname(smb_fname)
3618             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3619                 uint32 base_create_disposition;
3620                 struct smb_filename *smb_fname_base = NULL;
3621
3622                 if (create_options & FILE_DIRECTORY_FILE) {
3623                         status = NT_STATUS_NOT_A_DIRECTORY;
3624                         goto fail;
3625                 }
3626
3627                 switch (create_disposition) {
3628                 case FILE_OPEN:
3629                         base_create_disposition = FILE_OPEN;
3630                         break;
3631                 default:
3632                         base_create_disposition = FILE_OPEN_IF;
3633                         break;
3634                 }
3635
3636                 /* Create an smb_filename with stream_name == NULL. */
3637                 status = create_synthetic_smb_fname(talloc_tos(),
3638                                                     smb_fname->base_name,
3639                                                     NULL, NULL,
3640                                                     &smb_fname_base);
3641                 if (!NT_STATUS_IS_OK(status)) {
3642                         goto fail;
3643                 }
3644
3645                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3646                         DEBUG(10, ("Unable to stat stream: %s\n",
3647                                    smb_fname_str_dbg(smb_fname_base)));
3648                 }
3649
3650                 /* Open the base file. */
3651                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3652                                               FILE_SHARE_READ
3653                                               | FILE_SHARE_WRITE
3654                                               | FILE_SHARE_DELETE,
3655                                               base_create_disposition,
3656                                               0, 0, 0, 0, 0, NULL, NULL,
3657                                               &base_fsp, NULL);
3658                 TALLOC_FREE(smb_fname_base);
3659
3660                 if (!NT_STATUS_IS_OK(status)) {
3661                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3662                                    "%s\n", smb_fname->base_name,
3663                                    nt_errstr(status)));
3664                         goto fail;
3665                 }
3666                 /* we don't need to low level fd */
3667                 fd_close(base_fsp);
3668         }
3669
3670         /*
3671          * If it's a request for a directory open, deal with it separately.
3672          */
3673
3674         if (create_options & FILE_DIRECTORY_FILE) {
3675
3676                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3677                         status = NT_STATUS_INVALID_PARAMETER;
3678                         goto fail;
3679                 }
3680
3681                 /* Can't open a temp directory. IFS kit test. */
3682                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3683                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3684                         status = NT_STATUS_INVALID_PARAMETER;
3685                         goto fail;
3686                 }
3687
3688                 /*
3689                  * We will get a create directory here if the Win32
3690                  * app specified a security descriptor in the
3691                  * CreateDirectory() call.
3692                  */
3693
3694                 oplock_request = 0;
3695                 status = open_directory(
3696                         conn, req, smb_fname, access_mask, share_access,
3697                         create_disposition, create_options, file_attributes,
3698                         &info, &fsp);
3699         } else {
3700
3701                 /*
3702                  * Ordinary file case.
3703                  */
3704
3705                 status = file_new(req, conn, &fsp);
3706                 if(!NT_STATUS_IS_OK(status)) {
3707                         goto fail;
3708                 }
3709
3710                 status = fsp_set_smb_fname(fsp, smb_fname);
3711                 if (!NT_STATUS_IS_OK(status)) {
3712                         goto fail;
3713                 }
3714
3715                 if (base_fsp) {
3716                         /*
3717                          * We're opening the stream element of a
3718                          * base_fsp we already opened. Set up the
3719                          * base_fsp pointer.
3720                          */
3721                         fsp->base_fsp = base_fsp;
3722                 }
3723
3724                 if (allocation_size) {
3725                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3726                                                         allocation_size);
3727                 }
3728
3729                 status = open_file_ntcreate(conn,
3730                                             req,
3731                                             access_mask,
3732                                             share_access,
3733                                             create_disposition,
3734                                             create_options,
3735                                             file_attributes,
3736                                             oplock_request,
3737                                             private_flags,
3738                                             &info,
3739                                             fsp);
3740
3741                 if(!NT_STATUS_IS_OK(status)) {
3742                         file_free(req, fsp);
3743                         fsp = NULL;
3744                 }
3745
3746                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3747
3748                         /* A stream open never opens a directory */
3749
3750                         if (base_fsp) {
3751                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3752                                 goto fail;
3753                         }
3754
3755                         /*
3756                          * Fail the open if it was explicitly a non-directory
3757                          * file.
3758                          */
3759
3760                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3761                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3762                                 goto fail;
3763                         }
3764
3765                         oplock_request = 0;
3766                         status = open_directory(
3767                                 conn, req, smb_fname, access_mask,
3768                                 share_access, create_disposition,
3769                                 create_options, file_attributes,
3770                                 &info, &fsp);
3771                 }
3772         }
3773
3774         if (!NT_STATUS_IS_OK(status)) {
3775                 goto fail;
3776         }
3777
3778         fsp->base_fsp = base_fsp;
3779
3780         if ((ea_list != NULL) &&
3781             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3782                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3783                 if (!NT_STATUS_IS_OK(status)) {
3784                         goto fail;
3785                 }
3786         }
3787
3788         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3789                 status = NT_STATUS_ACCESS_DENIED;
3790                 goto fail;
3791         }
3792
3793         /* Save the requested allocation size. */
3794         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3795                 if (allocation_size
3796                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3797                         fsp->initial_allocation_size = smb_roundup(
3798                                 fsp->conn, allocation_size);
3799                         if (fsp->is_directory) {
3800                                 /* Can't set allocation size on a directory. */
3801                                 status = NT_STATUS_ACCESS_DENIED;
3802                                 goto fail;
3803                         }
3804                         if (vfs_allocate_file_space(
3805                                     fsp, fsp->initial_allocation_size) == -1) {
3806                                 status = NT_STATUS_DISK_FULL;
3807                                 goto fail;
3808                         }
3809                 } else {
3810                         fsp->initial_allocation_size = smb_roundup(
3811                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3812                 }
3813         } else {
3814                 fsp->initial_allocation_size = 0;
3815         }
3816
3817         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3818                                 fsp->base_fsp == NULL) {
3819                 if (sd != NULL) {
3820                         /*
3821                          * According to the MS documentation, the only time the security
3822                          * descriptor is applied to the opened file is iff we *created* the
3823                          * file; an existing file stays the same.
3824                          *
3825                          * Also, it seems (from observation) that you can open the file with
3826                          * any access mask but you can still write the sd. We need to override
3827                          * the granted access before we call set_sd
3828                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3829                          */
3830
3831                         uint32_t sec_info_sent;
3832                         uint32_t saved_access_mask = fsp->access_mask;
3833
3834                         sec_info_sent = get_sec_info(sd);
3835
3836                         fsp->access_mask = FILE_GENERIC_ALL;
3837
3838                         if (sec_info_sent & (SECINFO_OWNER|
3839                                                 SECINFO_GROUP|
3840                                                 SECINFO_DACL|
3841                                                 SECINFO_SACL)) {
3842                                 status = set_sd(fsp, sd, sec_info_sent);
3843                         }
3844
3845                         fsp->access_mask = saved_access_mask;
3846
3847                         if (!NT_STATUS_IS_OK(status)) {
3848                                 goto fail;
3849                         }
3850                 } else if (lp_inherit_acls(SNUM(conn))) {
3851                         /* Inherit from parent. Errors here are not fatal. */
3852                         status = inherit_new_acl(fsp);
3853                         if (!NT_STATUS_IS_OK(status)) {
3854                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3855                                         fsp_str_dbg(fsp),
3856                                         nt_errstr(status) ));
3857                         }
3858                 }
3859         }
3860
3861         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3862
3863         *result = fsp;
3864         if (pinfo != NULL) {
3865                 *pinfo = info;
3866         }
3867
3868         smb_fname->st = fsp->fsp_name->st;
3869
3870         return NT_STATUS_OK;
3871
3872  fail:
3873         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3874
3875         if (fsp != NULL) {
3876                 if (base_fsp && fsp->base_fsp == base_fsp) {
3877                         /*
3878                          * The close_file below will close
3879                          * fsp->base_fsp.
3880                          */
3881                         base_fsp = NULL;
3882                 }
3883                 close_file(req, fsp, ERROR_CLOSE);
3884                 fsp = NULL;
3885         }
3886         if (base_fsp != NULL) {
3887                 close_file(req, base_fsp, ERROR_CLOSE);
3888                 base_fsp = NULL;
3889         }
3890         return status;
3891 }
3892
3893 /*
3894  * Calculate the full path name given a relative fid.
3895  */
3896 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3897                                    struct smb_request *req,
3898                                    uint16_t root_dir_fid,
3899                                    const struct smb_filename *smb_fname,
3900                                    struct smb_filename **smb_fname_out)
3901 {
3902         files_struct *dir_fsp;
3903         char *parent_fname = NULL;
3904         char *new_base_name = NULL;
3905         NTSTATUS status;
3906
3907         if (root_dir_fid == 0 || !smb_fname) {
3908                 status = NT_STATUS_INTERNAL_ERROR;
3909                 goto out;
3910         }
3911
3912         dir_fsp = file_fsp(req, root_dir_fid);
3913
3914         if (dir_fsp == NULL) {
3915                 status = NT_STATUS_INVALID_HANDLE;
3916                 goto out;
3917         }
3918
3919         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3920                 status = NT_STATUS_INVALID_HANDLE;
3921                 goto out;
3922         }
3923
3924         if (!dir_fsp->is_directory) {
3925
3926                 /*
3927                  * Check to see if this is a mac fork of some kind.
3928                  */
3929
3930                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3931                     is_ntfs_stream_smb_fname(smb_fname)) {
3932                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3933                         goto out;
3934                 }
3935
3936                 /*
3937                   we need to handle the case when we get a
3938                   relative open relative to a file and the
3939                   pathname is blank - this is a reopen!
3940                   (hint from demyn plantenberg)
3941                 */
3942
3943                 status = NT_STATUS_INVALID_HANDLE;
3944                 goto out;
3945         }
3946
3947         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3948                 /*
3949                  * We're at the toplevel dir, the final file name
3950                  * must not contain ./, as this is filtered out
3951                  * normally by srvstr_get_path and unix_convert
3952                  * explicitly rejects paths containing ./.
3953                  */
3954                 parent_fname = talloc_strdup(talloc_tos(), "");
3955                 if (parent_fname == NULL) {
3956                         status = NT_STATUS_NO_MEMORY;
3957                         goto out;
3958                 }
3959         } else {
3960                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3961
3962                 /*
3963                  * Copy in the base directory name.
3964                  */
3965
3966                 parent_fname = talloc_array(talloc_tos(), char,
3967                     dir_name_len+2);
3968                 if (parent_fname == NULL) {
3969                         status = NT_STATUS_NO_MEMORY;
3970                         goto out;
3971                 }
3972                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3973                     dir_name_len+1);
3974
3975                 /*
3976                  * Ensure it ends in a '/'.
3977                  * We used TALLOC_SIZE +2 to add space for the '/'.
3978                  */
3979
3980                 if(dir_name_len
3981                     && (parent_fname[dir_name_len-1] != '\\')
3982                     && (parent_fname[dir_name_len-1] != '/')) {
3983                         parent_fname[dir_name_len] = '/';
3984                         parent_fname[dir_name_len+1] = '\0';
3985                 }
3986         }
3987
3988         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3989                                         smb_fname->base_name);
3990         if (new_base_name == NULL) {
3991                 status = NT_STATUS_NO_MEMORY;
3992                 goto out;
3993         }
3994
3995         status = filename_convert(req,
3996                                 conn,
3997                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3998                                 new_base_name,
3999                                 0,
4000                                 NULL,
4001                                 smb_fname_out);
4002         if (!NT_STATUS_IS_OK(status)) {
4003                 goto out;
4004         }
4005
4006  out:
4007         TALLOC_FREE(parent_fname);
4008         TALLOC_FREE(new_base_name);
4009         return status;
4010 }
4011
4012 NTSTATUS create_file_default(connection_struct *conn,
4013                              struct smb_request *req,
4014                              uint16_t root_dir_fid,
4015                              struct smb_filename *smb_fname,
4016                              uint32_t access_mask,
4017                              uint32_t share_access,
4018                              uint32_t create_disposition,
4019                              uint32_t create_options,
4020                              uint32_t file_attributes,
4021                              uint32_t oplock_request,
4022                              uint64_t allocation_size,
4023                              uint32_t private_flags,
4024                              struct security_descriptor *sd,
4025                              struct ea_list *ea_list,
4026                              files_struct **result,
4027                              int *pinfo)
4028 {
4029         int info = FILE_WAS_OPENED;
4030         files_struct *fsp = NULL;
4031         NTSTATUS status;
4032         bool stream_name = false;
4033
4034         DEBUG(10,("create_file: access_mask = 0x%x "
4035                   "file_attributes = 0x%x, share_access = 0x%x, "
4036                   "create_disposition = 0x%x create_options = 0x%x "
4037                   "oplock_request = 0x%x "
4038                   "private_flags = 0x%x "
4039                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4040                   "fname = %s\n",
4041                   (unsigned int)access_mask,
4042                   (unsigned int)file_attributes,
4043                   (unsigned int)share_access,
4044                   (unsigned int)create_disposition,
4045                   (unsigned int)create_options,
4046                   (unsigned int)oplock_request,
4047                   (unsigned int)private_flags,
4048                   (unsigned int)root_dir_fid,
4049                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4050
4051         /*
4052          * Calculate the filename from the root_dir_if if necessary.
4053          */
4054
4055         if (root_dir_fid != 0) {
4056                 struct smb_filename *smb_fname_out = NULL;
4057                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4058                                                    smb_fname, &smb_fname_out);
4059                 if (!NT_STATUS_IS_OK(status)) {
4060                         goto fail;
4061                 }
4062                 smb_fname = smb_fname_out;
4063         }
4064
4065         /*
4066          * Check to see if this is a mac fork of some kind.
4067          */
4068
4069         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4070         if (stream_name) {
4071                 enum FAKE_FILE_TYPE fake_file_type;
4072
4073                 fake_file_type = is_fake_file(smb_fname);
4074
4075                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4076
4077                         /*
4078                          * Here we go! support for changing the disk quotas
4079                          * --metze
4080                          *
4081                          * We need to fake up to open this MAGIC QUOTA file
4082                          * and return a valid FID.
4083                          *
4084                          * w2k close this file directly after openening xp
4085                          * also tries a QUERY_FILE_INFO on the file and then
4086                          * close it
4087                          */
4088                         status = open_fake_file(req, conn, req->vuid,
4089                                                 fake_file_type, smb_fname,
4090                                                 access_mask, &fsp);
4091                         if (!NT_STATUS_IS_OK(status)) {
4092                                 goto fail;
4093                         }
4094
4095                         ZERO_STRUCT(smb_fname->st);
4096                         goto done;
4097                 }
4098
4099                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4100                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4101                         goto fail;
4102                 }
4103         }
4104
4105         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4106                 int ret;
4107                 smb_fname->stream_name = NULL;
4108                 /* We have to handle this error here. */
4109                 if (create_options & FILE_DIRECTORY_FILE) {
4110                         status = NT_STATUS_NOT_A_DIRECTORY;
4111                         goto fail;
4112                 }
4113                 if (lp_posix_pathnames()) {
4114                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4115                 } else {
4116                         ret = SMB_VFS_STAT(conn, smb_fname);
4117                 }
4118
4119                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4120                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4121                         goto fail;
4122                 }
4123         }
4124
4125         status = create_file_unixpath(
4126                 conn, req, smb_fname, access_mask, share_access,
4127                 create_disposition, create_options, file_attributes,
4128                 oplock_request, allocation_size, private_flags,
4129                 sd, ea_list,
4130                 &fsp, &info);
4131
4132         if (!NT_STATUS_IS_OK(status)) {
4133                 goto fail;
4134         }
4135
4136  done:
4137         DEBUG(10, ("create_file: info=%d\n", info));
4138
4139         *result = fsp;
4140         if (pinfo != NULL) {
4141                 *pinfo = info;
4142         }
4143         return NT_STATUS_OK;
4144
4145  fail:
4146         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4147
4148         if (fsp != NULL) {
4149                 close_file(req, fsp, ERROR_CLOSE);
4150                 fsp = NULL;
4151         }
4152         return status;
4153 }