source3/smbd/open.c

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