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 "auth.h"
  31 #include "messages.h"
  32
  33 extern const struct generic_mapping file_generic_mapping;
  34
  35 struct deferred_open_record {
  36         bool delayed_for_oplocks;
  37         struct file_id id;
  38 };
  39
  40 /****************************************************************************
  41  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
  42 ****************************************************************************/
  43
  44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
  45                                 const struct security_descriptor *sd,
  46                                 const struct security_token *token,
  47                                 uint32_t access_desired,
  48                                 uint32_t *access_granted)
  49 {
  50         *access_granted = 0;
  51
  52         if (get_current_uid(conn) == (uid_t)0) {
  53                 /* I'm sorry sir, I didn't know you were root... */
  54                 *access_granted = access_desired;
  55                 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
  56                         *access_granted |= FILE_GENERIC_ALL;
  57                 }
  58                 return NT_STATUS_OK;
  59         }
  60
  61         return se_access_check(sd,
  62                                 token,
  63                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  64                                 access_granted);
  65 }
  66
  67 /****************************************************************************
  68  Check if we have open rights.
  69 ****************************************************************************/
  70
  71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  72                                 const struct smb_filename *smb_fname,
  73                                 uint32_t access_mask,
  74                                 uint32_t *access_granted)
  75 {
  76         /* Check if we have rights to open. */
  77         NTSTATUS status;
  78         struct security_descriptor *sd = NULL;
  79         uint32_t rejected_share_access;
  80
  81         rejected_share_access = access_mask & ~(conn->share_access);
  82
  83         if (rejected_share_access) {
  84                 *access_granted = rejected_share_access;
  85                 return NT_STATUS_ACCESS_DENIED;
  86         }
  87
  88         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  89                 *access_granted = access_mask;
  90
  91                 DEBUG(10,("smbd_check_open_rights: not checking ACL "
  92                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  93                         smb_fname_str_dbg(smb_fname),
  94                         (unsigned int)*access_granted ));
  95                 return NT_STATUS_OK;
  96         }
  97
  98         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
  99                         (SECINFO_OWNER |
 100                         SECINFO_GROUP |
 101                         SECINFO_DACL),&sd);
 102
 103         if (!NT_STATUS_IS_OK(status)) {
 104                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
 105                         "on %s: %s\n",
 106                         smb_fname_str_dbg(smb_fname),
 107                         nt_errstr(status)));
 108                 return status;
 109         }
 110
 111         status = smb1_file_se_access_check(conn,
 112                                 sd,
 113                                 get_current_nttok(conn),
 114                                 access_mask,
 115                                 access_granted);
 116
 117         DEBUG(10,("smbd_check_open_rights: file %s requesting "
 118                 "0x%x returning 0x%x (%s)\n",
 119                 smb_fname_str_dbg(smb_fname),
 120                 (unsigned int)access_mask,
 121                 (unsigned int)*access_granted,
 122                 nt_errstr(status) ));
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 if (DEBUGLEVEL >= 10) {
 126                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 127                                 smb_fname_str_dbg(smb_fname) ));
 128                         NDR_PRINT_DEBUG(security_descriptor, sd);
 129                 }
 130         }
 131
 132         TALLOC_FREE(sd);
 133
 134         return status;
 135 }
 136
 137 static NTSTATUS check_parent_access(struct connection_struct *conn,
 138                                 struct smb_filename *smb_fname,
 139                                 uint32_t access_mask,
 140                                 char **pp_parent_dir,
 141                                 struct security_descriptor **pp_parent_sd)
 142 {
 143         NTSTATUS status;
 144         char *parent_dir = NULL;
 145         struct security_descriptor *parent_sd = NULL;
 146         uint32_t access_granted = 0;
 147
 148         if (!parent_dirname(talloc_tos(),
 149                                 smb_fname->base_name,
 150                                 &parent_dir,
 151                                 NULL)) {
 152                 return NT_STATUS_NO_MEMORY;
 153         }
 154
 155         status = SMB_VFS_GET_NT_ACL(conn,
 156                                 parent_dir,
 157                                 SECINFO_DACL,
 158                                 &parent_sd);
 159
 160         if (!NT_STATUS_IS_OK(status)) {
 161                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 162                         "%s with error %s\n",
 163                         parent_dir,
 164                         nt_errstr(status)));
 165                 return status;
 166         }
 167
 168         status = smb1_file_se_access_check(conn,
 169                                         parent_sd,
 170                                         get_current_nttok(conn),
 171                                         access_mask,
 172                                         &access_granted);
 173         if(!NT_STATUS_IS_OK(status)) {
 174                 DEBUG(5,("check_parent_access: access check "
 175                         "on directory %s for "
 176                         "path %s for mask 0x%x returned (0x%x) %s\n",
 177                         parent_dir,
 178                         smb_fname->base_name,
 179                         access_mask,
 180                         access_granted,
 181                         nt_errstr(status) ));
 182                 return status;
 183         }
 184
 185         if (pp_parent_dir) {
 186                 *pp_parent_dir = parent_dir;
 187         }
 188         if (pp_parent_sd) {
 189                 *pp_parent_sd = parent_sd;
 190         }
 191         return NT_STATUS_OK;
 192 }
 193
 194 /****************************************************************************
 195  If the requester wanted DELETE_ACCESS and was only rejected because
 196  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
 197  ovverrides this.
 198 ****************************************************************************/
 199
 200 static bool parent_override_delete(connection_struct *conn,
 201                                         struct smb_filename *smb_fname,
 202                                         uint32_t access_mask,
 203                                         uint32_t rejected_mask)
 204 {
 205         if ((access_mask & DELETE_ACCESS) &&
 206                     (rejected_mask == DELETE_ACCESS) &&
 207                     can_delete_file_in_directory(conn, smb_fname)) {
 208                 return true;
 209         }
 210         return false;
 211 }
 212
 213 /****************************************************************************
 214  fd support routines - attempt to do a dos_open.
 215 ****************************************************************************/
 216
 217 static NTSTATUS fd_open(struct connection_struct *conn,
 218                     files_struct *fsp,
 219                     int flags,
 220                     mode_t mode)
 221 {
 222         struct smb_filename *smb_fname = fsp->fsp_name;
 223         NTSTATUS status = NT_STATUS_OK;
 224
 225 #ifdef O_NOFOLLOW
 226         /*
 227          * Never follow symlinks on a POSIX client. The
 228          * client should be doing this.
 229          */
 230
 231         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 232                 flags |= O_NOFOLLOW;
 233         }
 234 #endif
 235
 236         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 237         if (fsp->fh->fd == -1) {
 238                 status = map_nt_error_from_unix(errno);
 239                 if (errno == EMFILE) {
 240                         static time_t last_warned = 0L;
 241
 242                         if (time((time_t *) NULL) > last_warned) {
 243                                 DEBUG(0,("Too many open files, unable "
 244                                         "to open more!  smbd's max "
 245                                         "open files = %d\n",
 246                                         lp_max_open_files()));
 247                                 last_warned = time((time_t *) NULL);
 248                         }
 249                 }
 250
 251         }
 252
 253         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 254                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 255                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 256
 257         return status;
 258 }
 259
 260 /****************************************************************************
 261  Close the file associated with a fsp.
 262 ****************************************************************************/
 263
 264 NTSTATUS fd_close(files_struct *fsp)
 265 {
 266         int ret;
 267
 268         if (fsp->dptr) {
 269                 dptr_CloseDir(fsp);
 270         }
 271         if (fsp->fh->fd == -1) {
 272                 return NT_STATUS_OK; /* What we used to call a stat open. */
 273         }
 274         if (fsp->fh->ref_count > 1) {
 275                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 276         }
 277
 278         ret = SMB_VFS_CLOSE(fsp);
 279         fsp->fh->fd = -1;
 280         if (ret == -1) {
 281                 return map_nt_error_from_unix(errno);
 282         }
 283         return NT_STATUS_OK;
 284 }
 285
 286 /****************************************************************************
 287  Change the ownership of a file to that of the parent directory.
 288  Do this by fd if possible.
 289 ****************************************************************************/
 290
 291 void change_file_owner_to_parent(connection_struct *conn,
 292                                         const char *inherit_from_dir,
 293                                         files_struct *fsp)
 294 {
 295         struct smb_filename *smb_fname_parent = NULL;
 296         NTSTATUS status;
 297         int ret;
 298
 299         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 300                                             NULL, NULL, &smb_fname_parent);
 301         if (!NT_STATUS_IS_OK(status)) {
 302                 return;
 303         }
 304
 305         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 306         if (ret == -1) {
 307                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 308                          "directory %s. Error was %s\n",
 309                          smb_fname_str_dbg(smb_fname_parent),
 310                          strerror(errno)));
 311                 TALLOC_FREE(smb_fname_parent);
 312                 return;
 313         }
 314
 315         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 316                 /* Already this uid - no need to change. */
 317                 DEBUG(10,("change_file_owner_to_parent: file %s "
 318                         "is already owned by uid %d\n",
 319                         fsp_str_dbg(fsp),
 320                         (int)fsp->fsp_name->st.st_ex_uid ));
 321                 TALLOC_FREE(smb_fname_parent);
 322                 return;
 323         }
 324
 325         become_root();
 326         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 327         unbecome_root();
 328         if (ret == -1) {
 329                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 330                          "file %s to parent directory uid %u. Error "
 331                          "was %s\n", fsp_str_dbg(fsp),
 332                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 333                          strerror(errno) ));
 334         } else {
 335                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 336                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 337                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 338                 /* Ensure the uid entry is updated. */
 339                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 340         }
 341
 342         TALLOC_FREE(smb_fname_parent);
 343 }
 344
 345 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 346                                        const char *inherit_from_dir,
 347                                        const char *fname,
 348                                        SMB_STRUCT_STAT *psbuf)
 349 {
 350         struct smb_filename *smb_fname_parent = NULL;
 351         struct smb_filename *smb_fname_cwd = NULL;
 352         char *saved_dir = NULL;
 353         TALLOC_CTX *ctx = talloc_tos();
 354         NTSTATUS status = NT_STATUS_OK;
 355         int ret;
 356
 357         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 358                                             &smb_fname_parent);
 359         if (!NT_STATUS_IS_OK(status)) {
 360                 return status;
 361         }
 362
 363         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 364         if (ret == -1) {
 365                 status = map_nt_error_from_unix(errno);
 366                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 367                          "directory %s. Error was %s\n",
 368                          smb_fname_str_dbg(smb_fname_parent),
 369                          strerror(errno)));
 370                 goto out;
 371         }
 372
 373         /* We've already done an lstat into psbuf, and we know it's a
 374            directory. If we can cd into the directory and the dev/ino
 375            are the same then we can safely chown without races as
 376            we're locking the directory in place by being in it.  This
 377            should work on any UNIX (thanks tridge :-). JRA.
 378         */
 379
 380         saved_dir = vfs_GetWd(ctx,conn);
 381         if (!saved_dir) {
 382                 status = map_nt_error_from_unix(errno);
 383                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 384                          "current working directory. Error was %s\n",
 385                          strerror(errno)));
 386                 goto out;
 387         }
 388
 389         /* Chdir into the new path. */
 390         if (vfs_ChDir(conn, fname) == -1) {
 391                 status = map_nt_error_from_unix(errno);
 392                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 393                          "current working directory to %s. Error "
 394                          "was %s\n", fname, strerror(errno) ));
 395                 goto chdir;
 396         }
 397
 398         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 399                                             &smb_fname_cwd);
 400         if (!NT_STATUS_IS_OK(status)) {
 401                 return status;
 402         }
 403
 404         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 405         if (ret == -1) {
 406                 status = map_nt_error_from_unix(errno);
 407                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 408                          "directory '.' (%s) Error was %s\n",
 409                          fname, strerror(errno)));
 410                 goto chdir;
 411         }
 412
 413         /* Ensure we're pointing at the same place. */
 414         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 415             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 416                 DEBUG(0,("change_dir_owner_to_parent: "
 417                          "device/inode on directory %s changed. "
 418                          "Refusing to chown !\n", fname ));
 419                 status = NT_STATUS_ACCESS_DENIED;
 420                 goto chdir;
 421         }
 422
 423         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 424                 /* Already this uid - no need to change. */
 425                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 426                         "is already owned by uid %d\n",
 427                         fname,
 428                         (int)smb_fname_cwd->st.st_ex_uid ));
 429                 status = NT_STATUS_OK;
 430                 goto chdir;
 431         }
 432
 433         become_root();
 434         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 435                             (gid_t)-1);
 436         unbecome_root();
 437         if (ret == -1) {
 438                 status = map_nt_error_from_unix(errno);
 439                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 440                           "directory %s to parent directory uid %u. "
 441                           "Error was %s\n", fname,
 442                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 443                           strerror(errno) ));
 444         } else {
 445                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 446                         "directory %s to parent directory uid %u.\n",
 447                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 448                 /* Ensure the uid entry is updated. */
 449                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 450         }
 451
 452  chdir:
 453         vfs_ChDir(conn,saved_dir);
 454  out:
 455         TALLOC_FREE(smb_fname_parent);
 456         TALLOC_FREE(smb_fname_cwd);
 457         return status;
 458 }
 459
 460 /****************************************************************************
 461  Open a file.
 462 ****************************************************************************/
 463
 464 static NTSTATUS open_file(files_struct *fsp,
 465                           connection_struct *conn,
 466                           struct smb_request *req,
 467                           const char *parent_dir,
 468                           int flags,
 469                           mode_t unx_mode,
 470                           uint32 access_mask, /* client requested access mask. */
 471                           uint32 open_access_mask) /* what we're actually using in the open. */
 472 {
 473         struct smb_filename *smb_fname = fsp->fsp_name;
 474         NTSTATUS status = NT_STATUS_OK;
 475         int accmode = (flags & O_ACCMODE);
 476         int local_flags = flags;
 477         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 478         bool file_created = false;
 479
 480         fsp->fh->fd = -1;
 481         errno = EPERM;
 482
 483         /* Check permissions */
 484
 485         /*
 486          * This code was changed after seeing a client open request
 487          * containing the open mode of (DENY_WRITE/read-only) with
 488          * the 'create if not exist' bit set. The previous code
 489          * would fail to open the file read only on a read-only share
 490          * as it was checking the flags parameter  directly against O_RDONLY,
 491          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 492          * JRA.
 493          */
 494
 495         if (!CAN_WRITE(conn)) {
 496                 /* It's a read-only share - fail if we wanted to write. */
 497                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 498                         DEBUG(3,("Permission denied opening %s\n",
 499                                  smb_fname_str_dbg(smb_fname)));
 500                         return NT_STATUS_ACCESS_DENIED;
 501                 } else if(flags & O_CREAT) {
 502                         /* We don't want to write - but we must make sure that
 503                            O_CREAT doesn't create the file if we have write
 504                            access into the directory.
 505                         */
 506                         flags &= ~(O_CREAT|O_EXCL);
 507                         local_flags &= ~(O_CREAT|O_EXCL);
 508                 }
 509         }
 510
 511         /*
 512          * This little piece of insanity is inspired by the
 513          * fact that an NT client can open a file for O_RDONLY,
 514          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 515          * If the client *can* write to the file, then it expects to
 516          * truncate the file, even though it is opening for readonly.
 517          * Quicken uses this stupid trick in backup file creation...
 518          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 519          * for helping track this one down. It didn't bite us in 2.0.x
 520          * as we always opened files read-write in that release. JRA.
 521          */
 522
 523         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 524                 DEBUG(10,("open_file: truncate requested on read-only open "
 525                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 526                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 527         }
 528
 529         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 530             (!file_existed && (local_flags & O_CREAT)) ||
 531             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 532                 const char *wild;
 533
 534                 /*
 535                  * We can't actually truncate here as the file may be locked.
 536                  * open_file_ntcreate will take care of the truncate later. JRA.
 537                  */
 538
 539                 local_flags &= ~O_TRUNC;
 540
 541 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 542                 /*
 543                  * We would block on opening a FIFO with no one else on the
 544                  * other end. Do what we used to do and add O_NONBLOCK to the
 545                  * open flags. JRA.
 546                  */
 547
 548                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 549                         local_flags |= O_NONBLOCK;
 550                 }
 551 #endif
 552
 553                 /* Don't create files with Microsoft wildcard characters. */
 554                 if (fsp->base_fsp) {
 555                         /*
 556                          * wildcard characters are allowed in stream names
 557                          * only test the basefilename
 558                          */
 559                         wild = fsp->base_fsp->fsp_name->base_name;
 560                 } else {
 561                         wild = smb_fname->base_name;
 562                 }
 563                 if ((local_flags & O_CREAT) && !file_existed &&
 564                     ms_has_wild(wild))  {
 565                         return NT_STATUS_OBJECT_NAME_INVALID;
 566                 }
 567
 568                 /* Actually do the open */
 569                 status = fd_open(conn, fsp, local_flags, unx_mode);
 570                 if (!NT_STATUS_IS_OK(status)) {
 571                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 572                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 573                                  nt_errstr(status),local_flags,flags));
 574                         return status;
 575                 }
 576
 577                 if ((local_flags & O_CREAT) && !file_existed) {
 578                         file_created = true;
 579                 }
 580
 581         } else {
 582                 uint32_t access_granted = 0;
 583
 584                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 585                 if (!file_existed) {
 586                         /* File must exist for a stat open. */
 587                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 588                 }
 589
 590                 status = smbd_check_open_rights(conn,
 591                                 smb_fname,
 592                                 access_mask,
 593                                 &access_granted);
 594                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 595                         /*
 596                          * On NT_STATUS_ACCESS_DENIED, access_granted
 597                          * contains the denied bits.
 598                          */
 599
 600                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 601                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
 602                                         (lp_map_readonly(SNUM(conn)) ||
 603                                          lp_map_archive(SNUM(conn)) ||
 604                                          lp_map_hidden(SNUM(conn)) ||
 605                                          lp_map_system(SNUM(conn)))) {
 606                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
 607
 608                                 DEBUG(10,("open_file: "
 609                                           "overrode "
 610                                           "FILE_WRITE_"
 611                                           "ATTRIBUTES "
 612                                           "on file %s\n",
 613                                           smb_fname_str_dbg(
 614                                                   smb_fname)));
 615                         }
 616
 617                         if (parent_override_delete(conn,
 618                                                 smb_fname,
 619                                                 access_mask,
 620                                                 access_granted)) {
 621                                 /* Were we trying to do a stat open
 622                                  * for delete and didn't get DELETE
 623                                  * access (only) ? Check if the
 624                                  * directory allows DELETE_CHILD.
 625                                  * See here:
 626                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 627                                  * for details. */
 628
 629                                 access_granted &= ~DELETE_ACCESS;
 630
 631                                 DEBUG(10,("open_file: "
 632                                           "overrode "
 633                                           "DELETE_ACCESS on "
 634                                           "file %s\n",
 635                                           smb_fname_str_dbg(
 636                                                   smb_fname)));
 637                         }
 638
 639                         if (access_granted != 0) {
 640                                 DEBUG(10,("open_file: Access "
 641                                           "denied (0x%x) on file "
 642                                           "%s\n",
 643                                           access_granted,
 644                                           smb_fname_str_dbg(
 645                                                   smb_fname)));
 646                                 return status;
 647                         }
 648
 649                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 650                                     fsp->posix_open &&
 651                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
 652                         /* This is a POSIX stat open for delete
 653                          * or rename on a symlink that points
 654                          * nowhere. Allow. */
 655                         DEBUG(10,("open_file: allowing POSIX "
 656                                   "open on bad symlink %s\n",
 657                                   smb_fname_str_dbg(
 658                                           smb_fname)));
 659                 } else if (!NT_STATUS_IS_OK(status)) {
 660                         DEBUG(10,("open_file: "
 661                                   "smbd_check_open_rights on file "
 662                                   "%s returned %s\n",
 663                                   smb_fname_str_dbg(smb_fname),
 664                                   nt_errstr(status) ));
 665                         return status;
 666                 }
 667         }
 668
 669         if (!file_existed) {
 670                 int ret;
 671
 672                 if (fsp->fh->fd == -1) {
 673                         ret = SMB_VFS_STAT(conn, smb_fname);
 674                 } else {
 675                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 676                         /* If we have an fd, this stat should succeed. */
 677                         if (ret == -1) {
 678                                 DEBUG(0,("Error doing fstat on open file %s "
 679                                          "(%s)\n",
 680                                          smb_fname_str_dbg(smb_fname),
 681                                          strerror(errno) ));
 682                         }
 683                 }
 684
 685                 /* For a non-io open, this stat failing means file not found. JRA */
 686                 if (ret == -1) {
 687                         status = map_nt_error_from_unix(errno);
 688                         fd_close(fsp);
 689                         return status;
 690                 }
 691
 692                 if (file_created) {
 693                         bool need_re_stat = false;
 694                         /* Do all inheritance work after we've
 695                            done a successful stat call and filled
 696                            in the stat struct in fsp->fsp_name. */
 697
 698                         /* Inherit the ACL if required */
 699                         if (lp_inherit_perms(SNUM(conn))) {
 700                                 inherit_access_posix_acl(conn, parent_dir,
 701                                                          smb_fname->base_name,
 702                                                          unx_mode);
 703                                 need_re_stat = true;
 704                         }
 705
 706                         /* Change the owner if required. */
 707                         if (lp_inherit_owner(SNUM(conn))) {
 708                                 change_file_owner_to_parent(conn, parent_dir,
 709                                                             fsp);
 710                                 need_re_stat = true;
 711                         }
 712
 713                         if (need_re_stat) {
 714                                 if (fsp->fh->fd == -1) {
 715                                         ret = SMB_VFS_STAT(conn, smb_fname);
 716                                 } else {
 717                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 718                                         /* If we have an fd, this stat should succeed. */
 719                                         if (ret == -1) {
 720                                                 DEBUG(0,("Error doing fstat on open file %s "
 721                                                          "(%s)\n",
 722                                                          smb_fname_str_dbg(smb_fname),
 723                                                          strerror(errno) ));
 724                                         }
 725                                 }
 726                         }
 727
 728                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 729                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 730                                      smb_fname->base_name);
 731                 }
 732         }
 733
 734         /*
 735          * POSIX allows read-only opens of directories. We don't
 736          * want to do this (we use a different code path for this)
 737          * so catch a directory open and return an EISDIR. JRA.
 738          */
 739
 740         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 741                 fd_close(fsp);
 742                 errno = EISDIR;
 743                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 744         }
 745
 746         fsp->mode = smb_fname->st.st_ex_mode;
 747         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 748         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 749         fsp->file_pid = req ? req->smbpid : 0;
 750         fsp->can_lock = True;
 751         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 752         if (!CAN_WRITE(conn)) {
 753                 fsp->can_write = False;
 754         } else {
 755                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 756                         True : False;
 757         }
 758         fsp->print_file = NULL;
 759         fsp->modified = False;
 760         fsp->sent_oplock_break = NO_BREAK_SENT;
 761         fsp->is_directory = False;
 762         if (conn->aio_write_behind_list &&
 763             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 764                        conn->case_sensitive)) {
 765                 fsp->aio_write_behind = True;
 766         }
 767
 768         fsp->wcp = NULL; /* Write cache pointer. */
 769
 770         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 771                  conn->session_info->unix_info->unix_name,
 772                  smb_fname_str_dbg(smb_fname),
 773                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 774                  conn->num_files_open));
 775
 776         errno = 0;
 777         return NT_STATUS_OK;
 778 }
 779
 780 /****************************************************************************
 781  Check if we can open a file with a share mode.
 782  Returns True if conflict, False if not.
 783 ****************************************************************************/
 784
 785 static bool share_conflict(struct share_mode_entry *entry,
 786                            uint32 access_mask,
 787                            uint32 share_access)
 788 {
 789         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 790                   "entry->share_access = 0x%x, "
 791                   "entry->private_options = 0x%x\n",
 792                   (unsigned int)entry->access_mask,
 793                   (unsigned int)entry->share_access,
 794                   (unsigned int)entry->private_options));
 795
 796         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 797                   (unsigned int)access_mask, (unsigned int)share_access));
 798
 799         if ((entry->access_mask & (FILE_WRITE_DATA|
 800                                    FILE_APPEND_DATA|
 801                                    FILE_READ_DATA|
 802                                    FILE_EXECUTE|
 803                                    DELETE_ACCESS)) == 0) {
 804                 DEBUG(10,("share_conflict: No conflict due to "
 805                           "entry->access_mask = 0x%x\n",
 806                           (unsigned int)entry->access_mask ));
 807                 return False;
 808         }
 809
 810         if ((access_mask & (FILE_WRITE_DATA|
 811                             FILE_APPEND_DATA|
 812                             FILE_READ_DATA|
 813                             FILE_EXECUTE|
 814                             DELETE_ACCESS)) == 0) {
 815                 DEBUG(10,("share_conflict: No conflict due to "
 816                           "access_mask = 0x%x\n",
 817                           (unsigned int)access_mask ));
 818                 return False;
 819         }
 820
 821 #if 1 /* JRA TEST - Superdebug. */
 822 #define CHECK_MASK(num, am, right, sa, share) \
 823         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 824                 (unsigned int)(num), (unsigned int)(am), \
 825                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 826         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 827                 (unsigned int)(num), (unsigned int)(sa), \
 828                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 829         if (((am) & (right)) && !((sa) & (share))) { \
 830                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 831 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 832                         (unsigned int)(share) )); \
 833                 return True; \
 834         }
 835 #else
 836 #define CHECK_MASK(num, am, right, sa, share) \
 837         if (((am) & (right)) && !((sa) & (share))) { \
 838                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 839 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 840                         (unsigned int)(share) )); \
 841                 return True; \
 842         }
 843 #endif
 844
 845         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 846                    share_access, FILE_SHARE_WRITE);
 847         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 848                    entry->share_access, FILE_SHARE_WRITE);
 849
 850         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 851                    share_access, FILE_SHARE_READ);
 852         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 853                    entry->share_access, FILE_SHARE_READ);
 854
 855         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 856                    share_access, FILE_SHARE_DELETE);
 857         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 858                    entry->share_access, FILE_SHARE_DELETE);
 859
 860         DEBUG(10,("share_conflict: No conflict.\n"));
 861         return False;
 862 }
 863
 864 #if defined(DEVELOPER)
 865 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 866                                       int num,
 867                                       struct share_mode_entry *share_entry)
 868 {
 869         files_struct *fsp;
 870
 871         if (!procid_is_me(&share_entry->pid)) {
 872                 return;
 873         }
 874
 875         if (is_deferred_open_entry(share_entry) &&
 876             !open_was_deferred(sconn, share_entry->op_mid)) {
 877                 char *str = talloc_asprintf(talloc_tos(),
 878                         "Got a deferred entry without a request: "
 879                         "PANIC: %s\n",
 880                         share_mode_str(talloc_tos(), num, share_entry));
 881                 smb_panic(str);
 882         }
 883
 884         if (!is_valid_share_mode_entry(share_entry)) {
 885                 return;
 886         }
 887
 888         fsp = file_find_dif(sconn, share_entry->id,
 889                             share_entry->share_file_id);
 890         if (!fsp) {
 891                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 892                          share_mode_str(talloc_tos(), num, share_entry) ));
 893                 smb_panic("validate_my_share_entries: Cannot match a "
 894                           "share entry with an open file\n");
 895         }
 896
 897         if (is_deferred_open_entry(share_entry) ||
 898             is_unused_share_mode_entry(share_entry)) {
 899                 goto panic;
 900         }
 901
 902         if ((share_entry->op_type == NO_OPLOCK) &&
 903             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 904                 /* Someone has already written to it, but I haven't yet
 905                  * noticed */
 906                 return;
 907         }
 908
 909         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 910                 goto panic;
 911         }
 912
 913         return;
 914
 915  panic:
 916         {
 917                 char *str;
 918                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 919                          share_mode_str(talloc_tos(), num, share_entry) ));
 920                 str = talloc_asprintf(talloc_tos(),
 921                         "validate_my_share_entries: "
 922                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 923                          fsp->fsp_name->base_name,
 924                          (unsigned int)fsp->oplock_type,
 925                          (unsigned int)share_entry->op_type );
 926                 smb_panic(str);
 927         }
 928 }
 929 #endif
 930
 931 bool is_stat_open(uint32 access_mask)
 932 {
 933         return (access_mask &&
 934                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 935                                   FILE_WRITE_ATTRIBUTES))==0) &&
 936                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 937                                  FILE_WRITE_ATTRIBUTES)) != 0));
 938 }
 939
 940 /****************************************************************************
 941  Deal with share modes
 942  Invarient: Share mode must be locked on entry and exit.
 943  Returns -1 on error, or number of share modes on success (may be zero).
 944 ****************************************************************************/
 945
 946 static NTSTATUS open_mode_check(connection_struct *conn,
 947                                 struct share_mode_lock *lck,
 948                                 uint32_t name_hash,
 949                                 uint32 access_mask,
 950                                 uint32 share_access,
 951                                 uint32 create_options,
 952                                 bool *file_existed)
 953 {
 954         int i;
 955
 956         if(lck->num_share_modes == 0) {
 957                 return NT_STATUS_OK;
 958         }
 959
 960         *file_existed = True;
 961
 962         /* A delete on close prohibits everything */
 963
 964         if (is_delete_on_close_set(lck, name_hash)) {
 965                 return NT_STATUS_DELETE_PENDING;
 966         }
 967
 968         if (is_stat_open(access_mask)) {
 969                 /* Stat open that doesn't trigger oplock breaks or share mode
 970                  * checks... ! JRA. */
 971                 return NT_STATUS_OK;
 972         }
 973
 974         /*
 975          * Check if the share modes will give us access.
 976          */
 977
 978 #if defined(DEVELOPER)
 979         for(i = 0; i < lck->num_share_modes; i++) {
 980                 validate_my_share_entries(conn->sconn, i,
 981                                           &lck->share_modes[i]);
 982         }
 983 #endif
 984
 985         if (!lp_share_modes(SNUM(conn))) {
 986                 return NT_STATUS_OK;
 987         }
 988
 989         /* Now we check the share modes, after any oplock breaks. */
 990         for(i = 0; i < lck->num_share_modes; i++) {
 991
 992                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 993                         continue;
 994                 }
 995
 996                 /* someone else has a share lock on it, check to see if we can
 997                  * too */
 998                 if (share_conflict(&lck->share_modes[i],
 999                                    access_mask, share_access)) {
1000                         return NT_STATUS_SHARING_VIOLATION;
1001                 }
1002         }
1003
1004         return NT_STATUS_OK;
1005 }
1006
1007 static bool is_delete_request(files_struct *fsp) {
1008         return ((fsp->access_mask == DELETE_ACCESS) &&
1009                 (fsp->oplock_type == NO_OPLOCK));
1010 }
1011
1012 /*
1013  * Send a break message to the oplock holder and delay the open for
1014  * our client.
1015  */
1016
1017 static NTSTATUS send_break_message(files_struct *fsp,
1018                                         struct share_mode_entry *exclusive,
1019                                         uint64_t mid,
1020                                         int oplock_request)
1021 {
1022         NTSTATUS status;
1023         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1024
1025         DEBUG(10, ("Sending break request to PID %s\n",
1026                    procid_str_static(&exclusive->pid)));
1027         exclusive->op_mid = mid;
1028
1029         /* Create the message. */
1030         share_mode_entry_to_message(msg, exclusive);
1031
1032         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1033            don't want this set in the share mode struct pointed to by lck. */
1034
1035         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1036                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1037                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1038         }
1039
1040         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1041                                     MSG_SMB_BREAK_REQUEST,
1042                                     (uint8 *)msg,
1043                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1044         if (!NT_STATUS_IS_OK(status)) {
1045                 DEBUG(3, ("Could not send oplock break message: %s\n",
1046                           nt_errstr(status)));
1047         }
1048
1049         return status;
1050 }
1051
1052 /*
1053  * Return share_mode_entry pointers for :
1054  * 1). Batch oplock entry.
1055  * 2). Batch or exclusive oplock entry (may be identical to #1).
1056  * bool have_level2_oplock
1057  * bool have_no_oplock.
1058  * Do internal consistency checks on the share mode for a file.
1059  */
1060
1061 static void find_oplock_types(files_struct *fsp,
1062                                 int oplock_request,
1063                                 struct share_mode_lock *lck,
1064                                 struct share_mode_entry **pp_batch,
1065                                 struct share_mode_entry **pp_ex_or_batch,
1066                                 bool *got_level2,
1067                                 bool *got_no_oplock)
1068 {
1069         int i;
1070
1071         *pp_batch = NULL;
1072         *pp_ex_or_batch = NULL;
1073         *got_level2 = false;
1074         *got_no_oplock = false;
1075
1076         /* Ignore stat or internal opens, as is done in
1077                 delay_for_batch_oplocks() and
1078                 delay_for_exclusive_oplocks().
1079          */
1080         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1081                 return;
1082         }
1083
1084         for (i=0; i<lck->num_share_modes; i++) {
1085                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1086                         continue;
1087                 }
1088
1089                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1090                                 is_stat_open(lck->share_modes[i].access_mask)) {
1091                         /* We ignore stat opens in the table - they
1092                            always have NO_OPLOCK and never get or
1093                            cause breaks. JRA. */
1094                         continue;
1095                 }
1096
1097                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1098                         /* batch - can only be one. */
1099                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1100                                 smb_panic("Bad batch oplock entry.");
1101                         }
1102                         *pp_batch = &lck->share_modes[i];
1103                 }
1104
1105                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1106                         /* Exclusive or batch - can only be one. */
1107                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1108                                 smb_panic("Bad exclusive or batch oplock entry.");
1109                         }
1110                         *pp_ex_or_batch = &lck->share_modes[i];
1111                 }
1112
1113                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114                         if (*pp_batch || *pp_ex_or_batch) {
1115                                 smb_panic("Bad levelII oplock entry.");
1116                         }
1117                         *got_level2 = true;
1118                 }
1119
1120                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1121                         if (*pp_batch || *pp_ex_or_batch) {
1122                                 smb_panic("Bad no oplock entry.");
1123                         }
1124                         *got_no_oplock = true;
1125                 }
1126         }
1127 }
1128
1129 static bool delay_for_batch_oplocks(files_struct *fsp,
1130                                         uint64_t mid,
1131                                         int oplock_request,
1132                                         struct share_mode_entry *batch_entry)
1133 {
1134         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1135                 return false;
1136         }
1137
1138         if (batch_entry != NULL) {
1139                 /* Found a batch oplock */
1140                 send_break_message(fsp, batch_entry, mid, oplock_request);
1141                 return true;
1142         }
1143         return false;
1144 }
1145
1146 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1147                                         uint64_t mid,
1148                                         int oplock_request,
1149                                         struct share_mode_entry *ex_entry)
1150 {
1151         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1152                 return false;
1153         }
1154
1155         if (ex_entry != NULL) {
1156                 /* Found an exclusive or batch oplock */
1157                 bool delay_it = is_delete_request(fsp) ?
1158                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1159                 if (delay_it) {
1160                         send_break_message(fsp, ex_entry, mid, oplock_request);
1161                         return true;
1162                 }
1163         }
1164         return false;
1165 }
1166
1167 static void grant_fsp_oplock_type(files_struct *fsp,
1168                                 const struct byte_range_lock *br_lck,
1169                                 int oplock_request,
1170                                 bool got_level2_oplock,
1171                                 bool got_a_none_oplock)
1172 {
1173         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1174                             lp_level2_oplocks(SNUM(fsp->conn));
1175
1176         /* Start by granting what the client asked for,
1177            but ensure no SAMBA_PRIVATE bits can be set. */
1178         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1179
1180         if (oplock_request & INTERNAL_OPEN_ONLY) {
1181                 /* No oplocks on internal open. */
1182                 fsp->oplock_type = NO_OPLOCK;
1183                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1184                         fsp->oplock_type, fsp_str_dbg(fsp)));
1185                 return;
1186         } else if (br_lck && br_lck->num_locks > 0) {
1187                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1188                         fsp_str_dbg(fsp)));
1189                 fsp->oplock_type = NO_OPLOCK;
1190         }
1191
1192         if (is_stat_open(fsp->access_mask)) {
1193                 /* Leave the value already set. */
1194                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1195                         fsp->oplock_type, fsp_str_dbg(fsp)));
1196                 return;
1197         }
1198
1199         /*
1200          * Match what was requested (fsp->oplock_type) with
1201          * what was found in the existing share modes.
1202          */
1203
1204         if (got_a_none_oplock) {
1205                 fsp->oplock_type = NO_OPLOCK;
1206         } else if (got_level2_oplock) {
1207                 if (fsp->oplock_type == NO_OPLOCK ||
1208                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1209                         /* Store a level2 oplock, but don't tell the client */
1210                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1211                 } else {
1212                         fsp->oplock_type = LEVEL_II_OPLOCK;
1213                 }
1214         } else {
1215                 /* All share_mode_entries are placeholders or deferred.
1216                  * Silently upgrade to fake levelII if the client didn't
1217                  * ask for an oplock. */
1218                 if (fsp->oplock_type == NO_OPLOCK) {
1219                         /* Store a level2 oplock, but don't tell the client */
1220                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1221                 }
1222         }
1223
1224         /*
1225          * Don't grant level2 to clients that don't want them
1226          * or if we've turned them off.
1227          */
1228         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1229                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1230         }
1231
1232         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1233                   fsp->oplock_type, fsp_str_dbg(fsp)));
1234 }
1235
1236 bool request_timed_out(struct timeval request_time,
1237                        struct timeval timeout)
1238 {
1239         struct timeval now, end_time;
1240         GetTimeOfDay(&now);
1241         end_time = timeval_sum(&request_time, &timeout);
1242         return (timeval_compare(&end_time, &now) < 0);
1243 }
1244
1245 /****************************************************************************
1246  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1247 ****************************************************************************/
1248
1249 static void defer_open(struct share_mode_lock *lck,
1250                        struct timeval request_time,
1251                        struct timeval timeout,
1252                        struct smb_request *req,
1253                        struct deferred_open_record *state)
1254 {
1255         int i;
1256
1257         /* Paranoia check */
1258
1259         for (i=0; i<lck->num_share_modes; i++) {
1260                 struct share_mode_entry *e = &lck->share_modes[i];
1261
1262                 if (!is_deferred_open_entry(e)) {
1263                         continue;
1264                 }
1265
1266                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1267                         DEBUG(0, ("Trying to defer an already deferred "
1268                                 "request: mid=%llu, exiting\n",
1269                                 (unsigned long long)req->mid));
1270                         exit_server("attempt to defer a deferred request");
1271                 }
1272         }
1273
1274         /* End paranoia check */
1275
1276         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1277                   "open entry for mid %llu\n",
1278                   (unsigned int)request_time.tv_sec,
1279                   (unsigned int)request_time.tv_usec,
1280                   (unsigned long long)req->mid));
1281
1282         if (!push_deferred_open_message_smb(req, request_time, timeout,
1283                                        state->id, (char *)state, sizeof(*state))) {
1284                 exit_server("push_deferred_open_message_smb failed");
1285         }
1286         add_deferred_open(lck, req->mid, request_time,
1287                           sconn_server_id(req->sconn), state->id);
1288 }
1289
1290
1291 /****************************************************************************
1292  On overwrite open ensure that the attributes match.
1293 ****************************************************************************/
1294
1295 bool open_match_attributes(connection_struct *conn,
1296                            uint32 old_dos_attr,
1297                            uint32 new_dos_attr,
1298                            mode_t existing_unx_mode,
1299                            mode_t new_unx_mode,
1300                            mode_t *returned_unx_mode)
1301 {
1302         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1303
1304         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1305         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1306
1307         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1308            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1309                 *returned_unx_mode = new_unx_mode;
1310         } else {
1311                 *returned_unx_mode = (mode_t)0;
1312         }
1313
1314         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1315                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1316                   "returned_unx_mode = 0%o\n",
1317                   (unsigned int)old_dos_attr,
1318                   (unsigned int)existing_unx_mode,
1319                   (unsigned int)new_dos_attr,
1320                   (unsigned int)*returned_unx_mode ));
1321
1322         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1323         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1324                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1325                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1326                         return False;
1327                 }
1328         }
1329         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1330                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1331                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1332                         return False;
1333                 }
1334         }
1335         return True;
1336 }
1337
1338 /****************************************************************************
1339  Special FCB or DOS processing in the case of a sharing violation.
1340  Try and find a duplicated file handle.
1341 ****************************************************************************/
1342
1343 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1344                                      connection_struct *conn,
1345                                      files_struct *fsp_to_dup_into,
1346                                      const struct smb_filename *smb_fname,
1347                                      struct file_id id,
1348                                      uint16 file_pid,
1349                                      uint16 vuid,
1350                                      uint32 access_mask,
1351                                      uint32 share_access,
1352                                      uint32 create_options)
1353 {
1354         files_struct *fsp;
1355
1356         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1357                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1358
1359         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1360             fsp = file_find_di_next(fsp)) {
1361
1362                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1363                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1364                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1365                           fsp->fh->fd, (unsigned int)fsp->vuid,
1366                           (unsigned int)fsp->file_pid,
1367                           (unsigned int)fsp->fh->private_options,
1368                           (unsigned int)fsp->access_mask ));
1369
1370                 if (fsp->fh->fd != -1 &&
1371                     fsp->vuid == vuid &&
1372                     fsp->file_pid == file_pid &&
1373                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1374                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1375                     (fsp->access_mask & FILE_WRITE_DATA) &&
1376                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1377                     strequal(fsp->fsp_name->stream_name,
1378                              smb_fname->stream_name)) {
1379                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1380                         break;
1381                 }
1382         }
1383
1384         if (!fsp) {
1385                 return NT_STATUS_NOT_FOUND;
1386         }
1387
1388         /* quite an insane set of semantics ... */
1389         if (is_executable(smb_fname->base_name) &&
1390             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1391                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1392                 return NT_STATUS_INVALID_PARAMETER;
1393         }
1394
1395         /* We need to duplicate this fsp. */
1396         return dup_file_fsp(req, fsp, access_mask, share_access,
1397                             create_options, fsp_to_dup_into);
1398 }
1399
1400 static void schedule_defer_open(struct share_mode_lock *lck,
1401                                 struct timeval request_time,
1402                                 struct smb_request *req)
1403 {
1404         struct deferred_open_record state;
1405
1406         /* This is a relative time, added to the absolute
1407            request_time value to get the absolute timeout time.
1408            Note that if this is the second or greater time we enter
1409            this codepath for this particular request mid then
1410            request_time is left as the absolute time of the *first*
1411            time this request mid was processed. This is what allows
1412            the request to eventually time out. */
1413
1414         struct timeval timeout;
1415
1416         /* Normally the smbd we asked should respond within
1417          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1418          * the client did, give twice the timeout as a safety
1419          * measure here in case the other smbd is stuck
1420          * somewhere else. */
1421
1422         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1423
1424         /* Nothing actually uses state.delayed_for_oplocks
1425            but it's handy to differentiate in debug messages
1426            between a 30 second delay due to oplock break, and
1427            a 1 second delay for share mode conflicts. */
1428
1429         state.delayed_for_oplocks = True;
1430         state.id = lck->id;
1431
1432         if (!request_timed_out(request_time, timeout)) {
1433                 defer_open(lck, request_time, timeout, req, &state);
1434         }
1435 }
1436
1437 /****************************************************************************
1438  Work out what access_mask to use from what the client sent us.
1439 ****************************************************************************/
1440
1441 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1442                                     const struct smb_filename *smb_fname,
1443                                     bool file_existed,
1444                                     uint32_t access_mask,
1445                                     uint32_t *access_mask_out)
1446 {
1447         NTSTATUS status;
1448         uint32_t orig_access_mask = access_mask;
1449         uint32_t rejected_share_access;
1450
1451         /*
1452          * Convert GENERIC bits to specific bits.
1453          */
1454
1455         se_map_generic(&access_mask, &file_generic_mapping);
1456
1457         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1458         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1459                 if (file_existed) {
1460
1461                         struct security_descriptor *sd;
1462                         uint32_t access_granted = 0;
1463
1464                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1465                                         (SECINFO_OWNER |
1466                                         SECINFO_GROUP |
1467                                         SECINFO_DACL),&sd);
1468
1469                         if (!NT_STATUS_IS_OK(status)) {
1470                                 DEBUG(10,("smbd_calculate_access_mask: "
1471                                         "Could not get acl on file %s: %s\n",
1472                                         smb_fname_str_dbg(smb_fname),
1473                                         nt_errstr(status)));
1474                                 return NT_STATUS_ACCESS_DENIED;
1475                         }
1476
1477                         status = smb1_file_se_access_check(conn,
1478                                         sd,
1479                                         get_current_nttok(conn),
1480                                         access_mask,
1481                                         &access_granted);
1482
1483                         TALLOC_FREE(sd);
1484
1485                         if (!NT_STATUS_IS_OK(status)) {
1486                                 DEBUG(10, ("smbd_calculate_access_mask: "
1487                                         "Access denied on file %s: "
1488                                         "when calculating maximum access\n",
1489                                         smb_fname_str_dbg(smb_fname)));
1490                                 return NT_STATUS_ACCESS_DENIED;
1491                         }
1492
1493                         access_mask = access_granted;
1494                 } else {
1495                         access_mask = FILE_GENERIC_ALL;
1496                 }
1497
1498                 access_mask &= conn->share_access;
1499         }
1500
1501         rejected_share_access = access_mask & ~(conn->share_access);
1502
1503         if (rejected_share_access) {
1504                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1505                         "file %s: rejected by share access mask[0x%08X] "
1506                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1507                         smb_fname_str_dbg(smb_fname),
1508                         conn->share_access,
1509                         orig_access_mask, access_mask,
1510                         rejected_share_access));
1511                 return NT_STATUS_ACCESS_DENIED;
1512         }
1513
1514         *access_mask_out = access_mask;
1515         return NT_STATUS_OK;
1516 }
1517
1518 /****************************************************************************
1519  Remove the deferred open entry under lock.
1520 ****************************************************************************/
1521
1522 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1523                                 struct server_id pid)
1524 {
1525         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1526                         NULL, NULL, NULL);
1527         if (lck == NULL) {
1528                 DEBUG(0, ("could not get share mode lock\n"));
1529         } else {
1530                 del_deferred_open_entry(lck, mid, pid);
1531                 TALLOC_FREE(lck);
1532         }
1533 }
1534
1535 /****************************************************************
1536  Ensure we get the brlock lock followed by the share mode lock
1537  in the correct order to prevent deadlocks if other smbd's are
1538  using the brlock database on this file simultaneously with this open
1539  (that code also gets the locks in brlock -> share mode lock order).
1540 ****************************************************************/
1541
1542 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1543                                 files_struct *fsp,
1544                                 const struct file_id id,
1545                                 const char *connectpath,
1546                                 const struct smb_filename *smb_fname,
1547                                 const struct timespec *p_old_write_time,
1548                                 struct share_mode_lock **p_lck,
1549                                 struct byte_range_lock **p_br_lck)
1550 {
1551         /* Ordering - we must get the br_lck for this
1552            file before the share mode. */
1553         if (lp_locking(fsp->conn->params)) {
1554                 *p_br_lck = brl_get_locks_readonly(fsp);
1555                 if (*p_br_lck == NULL) {
1556                         DEBUG(0, ("Could not get br_lock\n"));
1557                         return false;
1558                 }
1559                 /* Note - we don't need to free the returned
1560                    br_lck explicitly as it was allocated on talloc_tos()
1561                    and so will be autofreed (and release the lock)
1562                    once the frame context disappears.
1563
1564                    If it was set to fsp->brlock_rec then it was
1565                    talloc_move'd to hang off the fsp pointer and
1566                    in this case is guarenteed to not be holding the
1567                    lock on the brlock database. */
1568         }
1569
1570         *p_lck = get_share_mode_lock(mem_ctx,
1571                                 id,
1572                                 connectpath,
1573                                 smb_fname,
1574                                 p_old_write_time);
1575
1576         if (*p_lck == NULL) {
1577                 DEBUG(0, ("Could not get share mode lock\n"));
1578                 TALLOC_FREE(*p_br_lck);
1579                 return false;
1580         }
1581         return true;
1582 }
1583
1584 /****************************************************************************
1585  Open a file with a share mode. Passed in an already created files_struct *.
1586 ****************************************************************************/
1587
1588 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1589                             struct smb_request *req,
1590                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1591                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1592                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1593                             uint32 create_options,      /* options such as delete on close. */
1594                             uint32 new_dos_attributes,  /* attributes used for new file. */
1595                             int oplock_request,         /* internal Samba oplock codes. */
1596                                                         /* Information (FILE_EXISTS etc.) */
1597                             uint32_t private_flags,     /* Samba specific flags. */
1598                             int *pinfo,
1599                             files_struct *fsp)
1600 {
1601         struct smb_filename *smb_fname = fsp->fsp_name;
1602         int flags=0;
1603         int flags2=0;
1604         bool file_existed = VALID_STAT(smb_fname->st);
1605         bool def_acl = False;
1606         bool posix_open = False;
1607         bool new_file_created = False;
1608         bool clear_ads = false;
1609         struct file_id id;
1610         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1611         mode_t new_unx_mode = (mode_t)0;
1612         mode_t unx_mode = (mode_t)0;
1613         int info;
1614         uint32 existing_dos_attributes = 0;
1615         struct timeval request_time = timeval_zero();
1616         struct share_mode_lock *lck = NULL;
1617         uint32 open_access_mask = access_mask;
1618         NTSTATUS status;
1619         char *parent_dir;
1620
1621         ZERO_STRUCT(id);
1622
1623         if (conn->printer) {
1624                 /*
1625                  * Printers are handled completely differently.
1626                  * Most of the passed parameters are ignored.
1627                  */
1628
1629                 if (pinfo) {
1630                         *pinfo = FILE_WAS_CREATED;
1631                 }
1632
1633                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1634                            smb_fname_str_dbg(smb_fname)));
1635
1636                 if (!req) {
1637                         DEBUG(0,("open_file_ntcreate: printer open without "
1638                                 "an SMB request!\n"));
1639                         return NT_STATUS_INTERNAL_ERROR;
1640                 }
1641
1642                 return print_spool_open(fsp, smb_fname->base_name,
1643                                         req->vuid);
1644         }
1645
1646         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1647                             NULL)) {
1648                 return NT_STATUS_NO_MEMORY;
1649         }
1650
1651         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1652                 posix_open = True;
1653                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1654                 new_dos_attributes = 0;
1655         } else {
1656                 /* Windows allows a new file to be created and
1657                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1658                    sent by the client. Do the same. */
1659
1660                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1661
1662                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1663                  * created new. */
1664                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1665                                      smb_fname, parent_dir);
1666         }
1667
1668         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1669                    "access_mask=0x%x share_access=0x%x "
1670                    "create_disposition = 0x%x create_options=0x%x "
1671                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1672                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1673                    access_mask, share_access, create_disposition,
1674                    create_options, (unsigned int)unx_mode, oplock_request,
1675                    (unsigned int)private_flags));
1676
1677         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1678                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1679                 return NT_STATUS_INTERNAL_ERROR;
1680         }
1681
1682         /*
1683          * Only non-internal opens can be deferred at all
1684          */
1685
1686         if (req) {
1687                 void *ptr;
1688                 if (get_deferred_open_message_state(req,
1689                                 &request_time,
1690                                 &ptr)) {
1691
1692                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1693                         /* Remember the absolute time of the original
1694                            request with this mid. We'll use it later to
1695                            see if this has timed out. */
1696
1697                         /* Remove the deferred open entry under lock. */
1698                         remove_deferred_open_entry(
1699                                 state->id, req->mid,
1700                                 sconn_server_id(req->sconn));
1701
1702                         /* Ensure we don't reprocess this message. */
1703                         remove_deferred_open_message_smb(req->sconn, req->mid);
1704                 }
1705         }
1706
1707         status = check_name(conn, smb_fname->base_name);
1708         if (!NT_STATUS_IS_OK(status)) {
1709                 return status;
1710         }
1711
1712         if (!posix_open) {
1713                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1714                 if (file_existed) {
1715                         existing_dos_attributes = dos_mode(conn, smb_fname);
1716                 }
1717         }
1718
1719         /* ignore any oplock requests if oplocks are disabled */
1720         if (!lp_oplocks(SNUM(conn)) ||
1721             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1722                 /* Mask off everything except the private Samba bits. */
1723                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1724         }
1725
1726         /* this is for OS/2 long file names - say we don't support them */
1727         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1728                 /* OS/2 Workplace shell fix may be main code stream in a later
1729                  * release. */
1730                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1731                          "supported.\n"));
1732                 if (use_nt_status()) {
1733                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1734                 }
1735                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1736         }
1737
1738         switch( create_disposition ) {
1739                 /*
1740                  * Currently we're using FILE_SUPERSEDE as the same as
1741                  * FILE_OVERWRITE_IF but they really are
1742                  * different. FILE_SUPERSEDE deletes an existing file
1743                  * (requiring delete access) then recreates it.
1744                  */
1745                 case FILE_SUPERSEDE:
1746                         /* If file exists replace/overwrite. If file doesn't
1747                          * exist create. */
1748                         flags2 |= (O_CREAT | O_TRUNC);
1749                         clear_ads = true;
1750                         break;
1751
1752                 case FILE_OVERWRITE_IF:
1753                         /* If file exists replace/overwrite. If file doesn't
1754                          * exist create. */
1755                         flags2 |= (O_CREAT | O_TRUNC);
1756                         clear_ads = true;
1757                         break;
1758
1759                 case FILE_OPEN:
1760                         /* If file exists open. If file doesn't exist error. */
1761                         if (!file_existed) {
1762                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1763                                          "requested for file %s and file "
1764                                          "doesn't exist.\n",
1765                                          smb_fname_str_dbg(smb_fname)));
1766                                 errno = ENOENT;
1767                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1768                         }
1769                         break;
1770
1771                 case FILE_OVERWRITE:
1772                         /* If file exists overwrite. If file doesn't exist
1773                          * error. */
1774                         if (!file_existed) {
1775                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1776                                          "requested for file %s and file "
1777                                          "doesn't exist.\n",
1778                                          smb_fname_str_dbg(smb_fname) ));
1779                                 errno = ENOENT;
1780                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1781                         }
1782                         flags2 |= O_TRUNC;
1783                         clear_ads = true;
1784                         break;
1785
1786                 case FILE_CREATE:
1787                         /* If file exists error. If file doesn't exist
1788                          * create. */
1789                         if (file_existed) {
1790                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1791                                          "requested for file %s and file "
1792                                          "already exists.\n",
1793                                          smb_fname_str_dbg(smb_fname)));
1794                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1795                                         errno = EISDIR;
1796                                 } else {
1797                                         errno = EEXIST;
1798                                 }
1799                                 return map_nt_error_from_unix(errno);
1800                         }
1801                         flags2 |= (O_CREAT|O_EXCL);
1802                         break;
1803
1804                 case FILE_OPEN_IF:
1805                         /* If file exists open. If file doesn't exist
1806                          * create. */
1807                         flags2 |= O_CREAT;
1808                         break;
1809
1810                 default:
1811                         return NT_STATUS_INVALID_PARAMETER;
1812         }
1813
1814         /* We only care about matching attributes on file exists and
1815          * overwrite. */
1816
1817         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1818                              (create_disposition == FILE_OVERWRITE_IF))) {
1819                 if (!open_match_attributes(conn, existing_dos_attributes,
1820                                            new_dos_attributes,
1821                                            smb_fname->st.st_ex_mode,
1822                                            unx_mode, &new_unx_mode)) {
1823                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1824                                  "for file %s (%x %x) (0%o, 0%o)\n",
1825                                  smb_fname_str_dbg(smb_fname),
1826                                  existing_dos_attributes,
1827                                  new_dos_attributes,
1828                                  (unsigned int)smb_fname->st.st_ex_mode,
1829                                  (unsigned int)unx_mode ));
1830                         errno = EACCES;
1831                         return NT_STATUS_ACCESS_DENIED;
1832                 }
1833         }
1834
1835         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1836                                         access_mask,
1837                                         &access_mask);
1838         if (!NT_STATUS_IS_OK(status)) {
1839                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1840                         "on file %s returned %s\n",
1841                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1842                 return status;
1843         }
1844
1845         open_access_mask = access_mask;
1846
1847         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1848                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1849         }
1850
1851         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1852                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1853                     access_mask));
1854
1855         /*
1856          * Note that we ignore the append flag as append does not
1857          * mean the same thing under DOS and Unix.
1858          */
1859
1860         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1861                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1862                 /* DENY_DOS opens are always underlying read-write on the
1863                    file handle, no matter what the requested access mask
1864                     says. */
1865                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1866                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1867                         flags = O_RDWR;
1868                 } else {
1869                         flags = O_WRONLY;
1870                 }
1871         } else {
1872                 flags = O_RDONLY;
1873         }
1874
1875         /*
1876          * Currently we only look at FILE_WRITE_THROUGH for create options.
1877          */
1878
1879 #if defined(O_SYNC)
1880         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1881                 flags2 |= O_SYNC;
1882         }
1883 #endif /* O_SYNC */
1884
1885         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1886                 flags2 |= O_APPEND;
1887         }
1888
1889         if (!posix_open && !CAN_WRITE(conn)) {
1890                 /*
1891                  * We should really return a permission denied error if either
1892                  * O_CREAT or O_TRUNC are set, but for compatibility with
1893                  * older versions of Samba we just AND them out.
1894                  */
1895                 flags2 &= ~(O_CREAT|O_TRUNC);
1896         }
1897
1898         /*
1899          * Ensure we can't write on a read-only share or file.
1900          */
1901
1902         if (flags != O_RDONLY && file_existed &&
1903             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1904                 DEBUG(5,("open_file_ntcreate: write access requested for "
1905                          "file %s on read only %s\n",
1906                          smb_fname_str_dbg(smb_fname),
1907                          !CAN_WRITE(conn) ? "share" : "file" ));
1908                 errno = EACCES;
1909                 return NT_STATUS_ACCESS_DENIED;
1910         }
1911
1912         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1913         fsp->share_access = share_access;
1914         fsp->fh->private_options = private_flags;
1915         fsp->access_mask = open_access_mask; /* We change this to the
1916                                               * requested access_mask after
1917                                               * the open is done. */
1918         fsp->posix_open = posix_open;
1919
1920         /* Ensure no SAMBA_PRIVATE bits can be set. */
1921         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1922
1923         if (timeval_is_zero(&request_time)) {
1924                 request_time = fsp->open_time;
1925         }
1926
1927         if (file_existed) {
1928                 struct byte_range_lock *br_lck = NULL;
1929                 struct share_mode_entry *batch_entry = NULL;
1930                 struct share_mode_entry *exclusive_entry = NULL;
1931                 bool got_level2_oplock = false;
1932                 bool got_a_none_oplock = false;
1933
1934                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1935                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1936
1937                 if (!acquire_ordered_locks(talloc_tos(),
1938                                         fsp,
1939                                         id,
1940                                         conn->connectpath,
1941                                         smb_fname,
1942                                         &old_write_time,
1943                                         &lck,
1944                                         &br_lck)) {
1945                         return NT_STATUS_SHARING_VIOLATION;
1946                 }
1947
1948                 /* Get the types we need to examine. */
1949                 find_oplock_types(fsp,
1950                                 oplock_request,
1951                                 lck,
1952                                 &batch_entry,
1953                                 &exclusive_entry,
1954                                 &got_level2_oplock,
1955                                 &got_a_none_oplock);
1956
1957                 /* First pass - send break only on batch oplocks. */
1958                 if ((req != NULL) &&
1959                                 delay_for_batch_oplocks(fsp,
1960                                         req->mid,
1961                                         oplock_request,
1962                                         batch_entry)) {
1963                         schedule_defer_open(lck, request_time, req);
1964                         TALLOC_FREE(lck);
1965                         return NT_STATUS_SHARING_VIOLATION;
1966                 }
1967
1968                 /* Use the client requested access mask here, not the one we
1969                  * open with. */
1970                 status = open_mode_check(conn, lck, fsp->name_hash,
1971                                         access_mask, share_access,
1972                                          create_options, &file_existed);
1973
1974                 if (NT_STATUS_IS_OK(status)) {
1975                         /* We might be going to allow this open. Check oplock
1976                          * status again. */
1977                         /* Second pass - send break for both batch or
1978                          * exclusive oplocks. */
1979                         if ((req != NULL) &&
1980                                         delay_for_exclusive_oplocks(
1981                                                 fsp,
1982                                                 req->mid,
1983                                                 oplock_request,
1984                                                 exclusive_entry)) {
1985                                 schedule_defer_open(lck, request_time, req);
1986                                 TALLOC_FREE(lck);
1987                                 return NT_STATUS_SHARING_VIOLATION;
1988                         }
1989                 }
1990
1991                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1992                         /* DELETE_PENDING is not deferred for a second */
1993                         TALLOC_FREE(lck);
1994                         return status;
1995                 }
1996
1997                 grant_fsp_oplock_type(fsp,
1998                                 br_lck,
1999                                 oplock_request,
2000                                 got_level2_oplock,
2001                                 got_a_none_oplock);
2002
2003                 if (!NT_STATUS_IS_OK(status)) {
2004                         uint32 can_access_mask;
2005                         bool can_access = True;
2006
2007                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2008
2009                         /* Check if this can be done with the deny_dos and fcb
2010                          * calls. */
2011                         if (private_flags &
2012                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2013                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2014                                 if (req == NULL) {
2015                                         DEBUG(0, ("DOS open without an SMB "
2016                                                   "request!\n"));
2017                                         TALLOC_FREE(lck);
2018                                         return NT_STATUS_INTERNAL_ERROR;
2019                                 }
2020
2021                                 /* Use the client requested access mask here,
2022                                  * not the one we open with. */
2023                                 status = fcb_or_dos_open(req,
2024                                                         conn,
2025                                                         fsp,
2026                                                         smb_fname,
2027                                                         id,
2028                                                         req->smbpid,
2029                                                         req->vuid,
2030                                                         access_mask,
2031                                                         share_access,
2032                                                         create_options);
2033
2034                                 if (NT_STATUS_IS_OK(status)) {
2035                                         TALLOC_FREE(lck);
2036                                         if (pinfo) {
2037                                                 *pinfo = FILE_WAS_OPENED;
2038                                         }
2039                                         return NT_STATUS_OK;
2040                                 }
2041                         }
2042
2043                         /*
2044                          * This next line is a subtlety we need for
2045                          * MS-Access. If a file open will fail due to share
2046                          * permissions and also for security (access) reasons,
2047                          * we need to return the access failed error, not the
2048                          * share error. We can't open the file due to kernel
2049                          * oplock deadlock (it's possible we failed above on
2050                          * the open_mode_check()) so use a userspace check.
2051                          */
2052
2053                         if (flags & O_RDWR) {
2054                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2055                         } else if (flags & O_WRONLY) {
2056                                 can_access_mask = FILE_WRITE_DATA;
2057                         } else {
2058                                 can_access_mask = FILE_READ_DATA;
2059                         }
2060
2061                         if (((can_access_mask & FILE_WRITE_DATA) &&
2062                                 !CAN_WRITE(conn)) ||
2063                             !can_access_file_data(conn, smb_fname,
2064                                                   can_access_mask)) {
2065                                 can_access = False;
2066                         }
2067
2068                         /*
2069                          * If we're returning a share violation, ensure we
2070                          * cope with the braindead 1 second delay.
2071                          */
2072
2073                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2074                             lp_defer_sharing_violations()) {
2075                                 struct timeval timeout;
2076                                 struct deferred_open_record state;
2077                                 int timeout_usecs;
2078
2079                                 /* this is a hack to speed up torture tests
2080                                    in 'make test' */
2081                                 timeout_usecs = lp_parm_int(SNUM(conn),
2082                                                             "smbd","sharedelay",
2083                                                             SHARING_VIOLATION_USEC_WAIT);
2084
2085                                 /* This is a relative time, added to the absolute
2086                                    request_time value to get the absolute timeout time.
2087                                    Note that if this is the second or greater time we enter
2088                                    this codepath for this particular request mid then
2089                                    request_time is left as the absolute time of the *first*
2090                                    time this request mid was processed. This is what allows
2091                                    the request to eventually time out. */
2092
2093                                 timeout = timeval_set(0, timeout_usecs);
2094
2095                                 /* Nothing actually uses state.delayed_for_oplocks
2096                                    but it's handy to differentiate in debug messages
2097                                    between a 30 second delay due to oplock break, and
2098                                    a 1 second delay for share mode conflicts. */
2099
2100                                 state.delayed_for_oplocks = False;
2101                                 state.id = id;
2102
2103                                 if ((req != NULL)
2104                                     && !request_timed_out(request_time,
2105                                                           timeout)) {
2106                                         defer_open(lck, request_time, timeout,
2107                                                    req, &state);
2108                                 }
2109                         }
2110
2111                         TALLOC_FREE(lck);
2112                         if (can_access) {
2113                                 /*
2114                                  * We have detected a sharing violation here
2115                                  * so return the correct error code
2116                                  */
2117                                 status = NT_STATUS_SHARING_VIOLATION;
2118                         } else {
2119                                 status = NT_STATUS_ACCESS_DENIED;
2120                         }
2121                         return status;
2122                 }
2123
2124                 /*
2125                  * We exit this block with the share entry *locked*.....
2126                  */
2127         }
2128
2129         SMB_ASSERT(!file_existed || (lck != NULL));
2130
2131         /*
2132          * Ensure we pay attention to default ACLs on directories if required.
2133          */
2134
2135         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2136             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2137                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2138         }
2139
2140         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2141                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2142                  (unsigned int)flags, (unsigned int)flags2,
2143                  (unsigned int)unx_mode, (unsigned int)access_mask,
2144                  (unsigned int)open_access_mask));
2145
2146         /*
2147          * open_file strips any O_TRUNC flags itself.
2148          */
2149
2150         fsp_open = open_file(fsp, conn, req, parent_dir,
2151                              flags|flags2, unx_mode, access_mask,
2152                              open_access_mask);
2153
2154         if (!NT_STATUS_IS_OK(fsp_open)) {
2155                 TALLOC_FREE(lck);
2156                 return fsp_open;
2157         }
2158
2159         if (!file_existed) {
2160                 struct byte_range_lock *br_lck = NULL;
2161                 struct share_mode_entry *batch_entry = NULL;
2162                 struct share_mode_entry *exclusive_entry = NULL;
2163                 bool got_level2_oplock = false;
2164                 bool got_a_none_oplock = false;
2165                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2166                 /*
2167                  * Deal with the race condition where two smbd's detect the
2168                  * file doesn't exist and do the create at the same time. One
2169                  * of them will win and set a share mode, the other (ie. this
2170                  * one) should check if the requested share mode for this
2171                  * create is allowed.
2172                  */
2173
2174                 /*
2175                  * Now the file exists and fsp is successfully opened,
2176                  * fsp->dev and fsp->inode are valid and should replace the
2177                  * dev=0,inode=0 from a non existent file. Spotted by
2178                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2179                  */
2180
2181                 id = fsp->file_id;
2182
2183                 if (!acquire_ordered_locks(talloc_tos(),
2184                                         fsp,
2185                                         id,
2186                                         conn->connectpath,
2187                                         smb_fname,
2188                                         &old_write_time,
2189                                         &lck,
2190                                         &br_lck)) {
2191                         return NT_STATUS_SHARING_VIOLATION;
2192                 }
2193
2194                 /* Get the types we need to examine. */
2195                 find_oplock_types(fsp,
2196                                 oplock_request,
2197                                 lck,
2198                                 &batch_entry,
2199                                 &exclusive_entry,
2200                                 &got_level2_oplock,
2201                                 &got_a_none_oplock);
2202
2203                 /* First pass - send break only on batch oplocks. */
2204                 if ((req != NULL) &&
2205                                 delay_for_batch_oplocks(fsp,
2206                                         req->mid,
2207                                         oplock_request,
2208                                         batch_entry)) {
2209                         schedule_defer_open(lck, request_time, req);
2210                         TALLOC_FREE(lck);
2211                         fd_close(fsp);
2212                         return NT_STATUS_SHARING_VIOLATION;
2213                 }
2214
2215                 status = open_mode_check(conn, lck, fsp->name_hash,
2216                                         access_mask, share_access,
2217                                          create_options, &file_existed);
2218
2219                 if (NT_STATUS_IS_OK(status)) {
2220                         /* We might be going to allow this open. Check oplock
2221                          * status again. */
2222                         /* Second pass - send break for both batch or
2223                          * exclusive oplocks. */
2224                         if ((req != NULL) &&
2225                                         delay_for_exclusive_oplocks(
2226                                                 fsp,
2227                                                 req->mid,
2228                                                 oplock_request,
2229                                                 exclusive_entry)) {
2230                                 schedule_defer_open(lck, request_time, req);
2231                                 TALLOC_FREE(lck);
2232                                 fd_close(fsp);
2233                                 return NT_STATUS_SHARING_VIOLATION;
2234                         }
2235                 }
2236
2237                 if (!NT_STATUS_IS_OK(status)) {
2238                         struct deferred_open_record state;
2239
2240                         state.delayed_for_oplocks = False;
2241                         state.id = id;
2242
2243                         /* Do it all over again immediately. In the second
2244                          * round we will find that the file existed and handle
2245                          * the DELETE_PENDING and FCB cases correctly. No need
2246                          * to duplicate the code here. Essentially this is a
2247                          * "goto top of this function", but don't tell
2248                          * anybody... */
2249
2250                         if (req != NULL) {
2251                                 defer_open(lck, request_time, timeval_zero(),
2252                                            req, &state);
2253                         }
2254                         TALLOC_FREE(lck);
2255                         fd_close(fsp);
2256                         return status;
2257                 }
2258
2259                 grant_fsp_oplock_type(fsp,
2260                                 br_lck,
2261                                 oplock_request,
2262                                 got_level2_oplock,
2263                                 got_a_none_oplock);
2264
2265                 /*
2266                  * We exit this block with the share entry *locked*.....
2267                  */
2268
2269         }
2270
2271         SMB_ASSERT(lck != NULL);
2272
2273         /* Delete streams if create_disposition requires it */
2274         if (file_existed && clear_ads &&
2275             !is_ntfs_stream_smb_fname(smb_fname)) {
2276                 status = delete_all_streams(conn, smb_fname->base_name);
2277                 if (!NT_STATUS_IS_OK(status)) {
2278                         TALLOC_FREE(lck);
2279                         fd_close(fsp);
2280                         return status;
2281                 }
2282         }
2283
2284         /* note that we ignore failure for the following. It is
2285            basically a hack for NFS, and NFS will never set one of
2286            these only read them. Nobody but Samba can ever set a deny
2287            mode and we have already checked our more authoritative
2288            locking database for permission to set this deny mode. If
2289            the kernel refuses the operations then the kernel is wrong.
2290            note that GPFS supports it as well - jmcd */
2291
2292         if (fsp->fh->fd != -1) {
2293                 int ret_flock;
2294                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2295                 if(ret_flock == -1 ){
2296
2297                         TALLOC_FREE(lck);
2298                         fd_close(fsp);
2299
2300                         return NT_STATUS_SHARING_VIOLATION;
2301                 }
2302         }
2303
2304         /*
2305          * At this point onwards, we can guarentee that the share entry
2306          * is locked, whether we created the file or not, and that the
2307          * deny mode is compatible with all current opens.
2308          */
2309
2310         /*
2311          * If requested, truncate the file.
2312          */
2313
2314         if (file_existed && (flags2&O_TRUNC)) {
2315                 /*
2316                  * We are modifing the file after open - update the stat
2317                  * struct..
2318                  */
2319                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2320                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2321                         status = map_nt_error_from_unix(errno);
2322                         TALLOC_FREE(lck);
2323                         fd_close(fsp);
2324                         return status;
2325                 }
2326         }
2327
2328         /*
2329          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2330          * but we don't have to store this - just ignore it on access check.
2331          */
2332         if (conn->sconn->using_smb2) {
2333                 /*
2334                  * SMB2 doesn't return it (according to Microsoft tests).
2335                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2336                  * File created with access = 0x7 (Read, Write, Delete)
2337                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2338                  */
2339                 fsp->access_mask = access_mask;
2340         } else {
2341                 /* But SMB1 does. */
2342                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2343         }
2344
2345         if (file_existed) {
2346                 /* stat opens on existing files don't get oplocks. */
2347                 if (is_stat_open(open_access_mask)) {
2348                         fsp->oplock_type = NO_OPLOCK;
2349                 }
2350
2351                 if (!(flags2 & O_TRUNC)) {
2352                         info = FILE_WAS_OPENED;
2353                 } else {
2354                         info = FILE_WAS_OVERWRITTEN;
2355                 }
2356         } else {
2357                 info = FILE_WAS_CREATED;
2358         }
2359
2360         if (pinfo) {
2361                 *pinfo = info;
2362         }
2363
2364         /*
2365          * Setup the oplock info in both the shared memory and
2366          * file structs.
2367          */
2368
2369         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2370                 /*
2371                  * Could not get the kernel oplock or there are byte-range
2372                  * locks on the file.
2373                  */
2374                 fsp->oplock_type = NO_OPLOCK;
2375         }
2376
2377         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2378                 new_file_created = True;
2379         }
2380
2381         set_share_mode(lck, fsp, get_current_uid(conn),
2382                         req ? req->mid : 0,
2383                        fsp->oplock_type);
2384
2385         /* Handle strange delete on close create semantics. */
2386         if (create_options & FILE_DELETE_ON_CLOSE) {
2387
2388                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2389
2390                 if (!NT_STATUS_IS_OK(status)) {
2391                         /* Remember to delete the mode we just added. */
2392                         del_share_mode(lck, fsp);
2393                         TALLOC_FREE(lck);
2394                         fd_close(fsp);
2395                         return status;
2396                 }
2397                 /* Note that here we set the *inital* delete on close flag,
2398                    not the regular one. The magic gets handled in close. */
2399                 fsp->initial_delete_on_close = True;
2400         }
2401
2402         if (new_file_created) {
2403                 /* Files should be initially set as archive */
2404                 if (lp_map_archive(SNUM(conn)) ||
2405                     lp_store_dos_attributes(SNUM(conn))) {
2406                         if (!posix_open) {
2407                                 if (file_set_dosmode(conn, smb_fname,
2408                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2409                                             parent_dir, true) == 0) {
2410                                         unx_mode = smb_fname->st.st_ex_mode;
2411                                 }
2412                         }
2413                 }
2414         }
2415
2416         /* Determine sparse flag. */
2417         if (posix_open) {
2418                 /* POSIX opens are sparse by default. */
2419                 fsp->is_sparse = true;
2420         } else {
2421                 fsp->is_sparse = (file_existed &&
2422                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2423         }
2424
2425         /*
2426          * Take care of inherited ACLs on created files - if default ACL not
2427          * selected.
2428          */
2429
2430         if (!posix_open && !file_existed && !def_acl) {
2431
2432                 int saved_errno = errno; /* We might get ENOSYS in the next
2433                                           * call.. */
2434
2435                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2436                     errno == ENOSYS) {
2437                         errno = saved_errno; /* Ignore ENOSYS */
2438                 }
2439
2440         } else if (new_unx_mode) {
2441
2442                 int ret = -1;
2443
2444                 /* Attributes need changing. File already existed. */
2445
2446                 {
2447                         int saved_errno = errno; /* We might get ENOSYS in the
2448                                                   * next call.. */
2449                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2450
2451                         if (ret == -1 && errno == ENOSYS) {
2452                                 errno = saved_errno; /* Ignore ENOSYS */
2453                         } else {
2454                                 DEBUG(5, ("open_file_ntcreate: reset "
2455                                           "attributes of file %s to 0%o\n",
2456                                           smb_fname_str_dbg(smb_fname),
2457                                           (unsigned int)new_unx_mode));
2458                                 ret = 0; /* Don't do the fchmod below. */
2459                         }
2460                 }
2461
2462                 if ((ret == -1) &&
2463                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2464                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2465                                   "attributes of file %s to 0%o\n",
2466                                   smb_fname_str_dbg(smb_fname),
2467                                   (unsigned int)new_unx_mode));
2468         }
2469
2470         /* If this is a successful open, we must remove any deferred open
2471          * records. */
2472         if (req != NULL) {
2473                 del_deferred_open_entry(lck, req->mid,
2474                                         sconn_server_id(req->sconn));
2475         }
2476         TALLOC_FREE(lck);
2477
2478         return NT_STATUS_OK;
2479 }
2480
2481
2482 /****************************************************************************
2483  Open a file for for write to ensure that we can fchmod it.
2484 ****************************************************************************/
2485
2486 NTSTATUS open_file_fchmod(connection_struct *conn,
2487                           struct smb_filename *smb_fname,
2488                           files_struct **result)
2489 {
2490         if (!VALID_STAT(smb_fname->st)) {
2491                 return NT_STATUS_INVALID_PARAMETER;
2492         }
2493
2494         return SMB_VFS_CREATE_FILE(
2495                 conn,                                   /* conn */
2496                 NULL,                                   /* req */
2497                 0,                                      /* root_dir_fid */
2498                 smb_fname,                              /* fname */
2499                 FILE_WRITE_DATA,                        /* access_mask */
2500                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2501                     FILE_SHARE_DELETE),
2502                 FILE_OPEN,                              /* create_disposition*/
2503                 0,                                      /* create_options */
2504                 0,                                      /* file_attributes */
2505                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2506                 0,                                      /* allocation_size */
2507                 0,                                      /* private_flags */
2508                 NULL,                                   /* sd */
2509                 NULL,                                   /* ea_list */
2510                 result,                                 /* result */
2511                 NULL);                                  /* pinfo */
2512 }
2513
2514 static NTSTATUS mkdir_internal(connection_struct *conn,
2515                                struct smb_filename *smb_dname,
2516                                uint32 file_attributes)
2517 {
2518         mode_t mode;
2519         char *parent_dir = NULL;
2520         NTSTATUS status;
2521         bool posix_open = false;
2522         bool need_re_stat = false;
2523         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2524
2525         if(access_mask & ~(conn->share_access)) {
2526                 DEBUG(5,("mkdir_internal: failing share access "
2527                          "%s\n", lp_servicename(SNUM(conn))));
2528                 return NT_STATUS_ACCESS_DENIED;
2529         }
2530
2531         status = check_name(conn, smb_dname->base_name);
2532         if (!NT_STATUS_IS_OK(status)) {
2533                 return status;
2534         }
2535
2536         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2537                             NULL)) {
2538                 return NT_STATUS_NO_MEMORY;
2539         }
2540
2541         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2542                 posix_open = true;
2543                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2544         } else {
2545                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2546         }
2547
2548         status = check_parent_access(conn,
2549                                         smb_dname,
2550                                         access_mask,
2551                                         &parent_dir,
2552                                         NULL);
2553         if(!NT_STATUS_IS_OK(status)) {
2554                 DEBUG(5,("mkdir_internal: check_parent_access "
2555                         "on directory %s for path %s returned %s\n",
2556                         parent_dir,
2557                         smb_dname->base_name,
2558                         nt_errstr(status) ));
2559                 return status;
2560         }
2561
2562         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2563                 return map_nt_error_from_unix(errno);
2564         }
2565
2566         /* Ensure we're checking for a symlink here.... */
2567         /* We don't want to get caught by a symlink racer. */
2568
2569         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2570                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2571                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2572                 return map_nt_error_from_unix(errno);
2573         }
2574
2575         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2576                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2577                           smb_fname_str_dbg(smb_dname)));
2578                 return NT_STATUS_NOT_A_DIRECTORY;
2579         }
2580
2581         if (lp_store_dos_attributes(SNUM(conn))) {
2582                 if (!posix_open) {
2583                         file_set_dosmode(conn, smb_dname,
2584                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2585                                          parent_dir, true);
2586                 }
2587         }
2588
2589         if (lp_inherit_perms(SNUM(conn))) {
2590                 inherit_access_posix_acl(conn, parent_dir,
2591                                          smb_dname->base_name, mode);
2592                 need_re_stat = true;
2593         }
2594
2595         if (!posix_open) {
2596                 /*
2597                  * Check if high bits should have been set,
2598                  * then (if bits are missing): add them.
2599                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2600                  * dir.
2601                  */
2602                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2603                     (mode & ~smb_dname->st.st_ex_mode)) {
2604                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2605                                       (smb_dname->st.st_ex_mode |
2606                                           (mode & ~smb_dname->st.st_ex_mode)));
2607                         need_re_stat = true;
2608                 }
2609         }
2610
2611         /* Change the owner if required. */
2612         if (lp_inherit_owner(SNUM(conn))) {
2613                 change_dir_owner_to_parent(conn, parent_dir,
2614                                            smb_dname->base_name,
2615                                            &smb_dname->st);
2616                 need_re_stat = true;
2617         }
2618
2619         if (need_re_stat) {
2620                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2621                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2622                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2623                         return map_nt_error_from_unix(errno);
2624                 }
2625         }
2626
2627         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2628                      smb_dname->base_name);
2629
2630         return NT_STATUS_OK;
2631 }
2632
2633 /****************************************************************************
2634  Ensure we didn't get symlink raced on opening a directory.
2635 ****************************************************************************/
2636
2637 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2638                         const SMB_STRUCT_STAT *sbuf2)
2639 {
2640         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2641                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2642                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2643                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2644                 return false;
2645         }
2646         return true;
2647 }
2648
2649 /****************************************************************************
2650  Open a directory from an NT SMB call.
2651 ****************************************************************************/
2652
2653 static NTSTATUS open_directory(connection_struct *conn,
2654                                struct smb_request *req,
2655                                struct smb_filename *smb_dname,
2656                                uint32 access_mask,
2657                                uint32 share_access,
2658                                uint32 create_disposition,
2659                                uint32 create_options,
2660                                uint32 file_attributes,
2661                                int *pinfo,
2662                                files_struct **result)
2663 {
2664         files_struct *fsp = NULL;
2665         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2666         struct share_mode_lock *lck = NULL;
2667         NTSTATUS status;
2668         struct timespec mtimespec;
2669         int info = 0;
2670
2671         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2672
2673         /* Ensure we have a directory attribute. */
2674         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2675
2676         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2677                  "share_access = 0x%x create_options = 0x%x, "
2678                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2679                  smb_fname_str_dbg(smb_dname),
2680                  (unsigned int)access_mask,
2681                  (unsigned int)share_access,
2682                  (unsigned int)create_options,
2683                  (unsigned int)create_disposition,
2684                  (unsigned int)file_attributes));
2685
2686         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2687                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2688                         is_ntfs_stream_smb_fname(smb_dname)) {
2689                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2690                           smb_fname_str_dbg(smb_dname)));
2691                 return NT_STATUS_NOT_A_DIRECTORY;
2692         }
2693
2694         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2695                                             access_mask, &access_mask);
2696         if (!NT_STATUS_IS_OK(status)) {
2697                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2698                         "on file %s returned %s\n",
2699                         smb_fname_str_dbg(smb_dname),
2700                         nt_errstr(status)));
2701                 return status;
2702         }
2703
2704         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2705                         !security_token_has_privilege(get_current_nttok(conn),
2706                                         SEC_PRIV_SECURITY)) {
2707                 DEBUG(10, ("open_directory: open on %s "
2708                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2709                         smb_fname_str_dbg(smb_dname)));
2710                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2711         }
2712
2713         switch( create_disposition ) {
2714                 case FILE_OPEN:
2715
2716                         if (!dir_existed) {
2717                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2718                         }
2719
2720                         info = FILE_WAS_OPENED;
2721                         break;
2722
2723                 case FILE_CREATE:
2724
2725                         /* If directory exists error. If directory doesn't
2726                          * exist create. */
2727
2728                         if (dir_existed) {
2729                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2730                                 DEBUG(2, ("open_directory: unable to create "
2731                                           "%s. Error was %s\n",
2732                                           smb_fname_str_dbg(smb_dname),
2733                                           nt_errstr(status)));
2734                                 return status;
2735                         }
2736
2737                         status = mkdir_internal(conn, smb_dname,
2738                                                 file_attributes);
2739
2740                         if (!NT_STATUS_IS_OK(status)) {
2741                                 DEBUG(2, ("open_directory: unable to create "
2742                                           "%s. Error was %s\n",
2743                                           smb_fname_str_dbg(smb_dname),
2744                                           nt_errstr(status)));
2745                                 return status;
2746                         }
2747
2748                         info = FILE_WAS_CREATED;
2749                         break;
2750
2751                 case FILE_OPEN_IF:
2752                         /*
2753                          * If directory exists open. If directory doesn't
2754                          * exist create.
2755                          */
2756
2757                         if (dir_existed) {
2758                                 status = NT_STATUS_OK;
2759                                 info = FILE_WAS_OPENED;
2760                         } else {
2761                                 status = mkdir_internal(conn, smb_dname,
2762                                                 file_attributes);
2763
2764                                 if (NT_STATUS_IS_OK(status)) {
2765                                         info = FILE_WAS_CREATED;
2766                                 } else {
2767                                         /* Cope with create race. */
2768                                         if (!NT_STATUS_EQUAL(status,
2769                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2770                                                 DEBUG(2, ("open_directory: unable to create "
2771                                                         "%s. Error was %s\n",
2772                                                         smb_fname_str_dbg(smb_dname),
2773                                                         nt_errstr(status)));
2774                                                 return status;
2775                                         }
2776                                         info = FILE_WAS_OPENED;
2777                                 }
2778                         }
2779
2780                         break;
2781
2782                 case FILE_SUPERSEDE:
2783                 case FILE_OVERWRITE:
2784                 case FILE_OVERWRITE_IF:
2785                 default:
2786                         DEBUG(5,("open_directory: invalid create_disposition "
2787                                  "0x%x for directory %s\n",
2788                                  (unsigned int)create_disposition,
2789                                  smb_fname_str_dbg(smb_dname)));
2790                         return NT_STATUS_INVALID_PARAMETER;
2791         }
2792
2793         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2794                 DEBUG(5,("open_directory: %s is not a directory !\n",
2795                          smb_fname_str_dbg(smb_dname)));
2796                 return NT_STATUS_NOT_A_DIRECTORY;
2797         }
2798
2799         if (info == FILE_WAS_OPENED) {
2800                 uint32_t access_granted = 0;
2801                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2802                                                 &access_granted);
2803
2804                 /* Were we trying to do a directory open
2805                  * for delete and didn't get DELETE
2806                  * access (only) ? Check if the
2807                  * directory allows DELETE_CHILD.
2808                  * See here:
2809                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2810                  * for details. */
2811
2812                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2813                                 parent_override_delete(conn,
2814                                                 smb_dname,
2815                                                 access_mask,
2816                                                 access_granted)) {
2817                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2818                                 "on directory %s\n",
2819                                 smb_fname_str_dbg(smb_dname)));
2820                         status = NT_STATUS_OK;
2821                 }
2822
2823                 if (!NT_STATUS_IS_OK(status)) {
2824                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2825                                 "file %s failed with %s\n",
2826                                 smb_fname_str_dbg(smb_dname),
2827                                 nt_errstr(status)));
2828                         return status;
2829                 }
2830         }
2831
2832         status = file_new(req, conn, &fsp);
2833         if(!NT_STATUS_IS_OK(status)) {
2834                 return status;
2835         }
2836
2837         /*
2838          * Setup the files_struct for it.
2839          */
2840
2841         fsp->mode = smb_dname->st.st_ex_mode;
2842         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2843         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2844         fsp->file_pid = req ? req->smbpid : 0;
2845         fsp->can_lock = False;
2846         fsp->can_read = False;
2847         fsp->can_write = False;
2848
2849         fsp->share_access = share_access;
2850         fsp->fh->private_options = 0;
2851         /*
2852          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2853          */
2854         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2855         fsp->print_file = NULL;
2856         fsp->modified = False;
2857         fsp->oplock_type = NO_OPLOCK;
2858         fsp->sent_oplock_break = NO_BREAK_SENT;
2859         fsp->is_directory = True;
2860         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2861         status = fsp_set_smb_fname(fsp, smb_dname);
2862         if (!NT_STATUS_IS_OK(status)) {
2863                 file_free(req, fsp);
2864                 return status;
2865         }
2866
2867         mtimespec = smb_dname->st.st_ex_mtime;
2868
2869 #ifdef O_DIRECTORY
2870         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2871 #else
2872         /* POSIX allows us to open a directory with O_RDONLY. */
2873         status = fd_open(conn, fsp, O_RDONLY, 0);
2874 #endif
2875         if (!NT_STATUS_IS_OK(status)) {
2876                 DEBUG(5, ("open_directory: Could not open fd for "
2877                         "%s (%s)\n",
2878                         smb_fname_str_dbg(smb_dname),
2879                         nt_errstr(status)));
2880                 file_free(req, fsp);
2881                 return status;
2882         }
2883
2884         status = vfs_stat_fsp(fsp);
2885         if (!NT_STATUS_IS_OK(status)) {
2886                 fd_close(fsp);
2887                 file_free(req, fsp);
2888                 return status;
2889         }
2890
2891         /* Ensure there was no race condition. */
2892         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2893                 DEBUG(5,("open_directory: stat struct differs for "
2894                         "directory %s.\n",
2895                         smb_fname_str_dbg(smb_dname)));
2896                 fd_close(fsp);
2897                 file_free(req, fsp);
2898                 return NT_STATUS_ACCESS_DENIED;
2899         }
2900
2901         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2902                                   conn->connectpath, smb_dname, &mtimespec);
2903
2904         if (lck == NULL) {
2905                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2906                           "%s\n", smb_fname_str_dbg(smb_dname)));
2907                 fd_close(fsp);
2908                 file_free(req, fsp);
2909                 return NT_STATUS_SHARING_VIOLATION;
2910         }
2911
2912         status = open_mode_check(conn, lck, fsp->name_hash,
2913                                 access_mask, share_access,
2914                                  create_options, &dir_existed);
2915
2916         if (!NT_STATUS_IS_OK(status)) {
2917                 TALLOC_FREE(lck);
2918                 fd_close(fsp);
2919                 file_free(req, fsp);
2920                 return status;
2921         }
2922
2923         set_share_mode(lck, fsp, get_current_uid(conn),
2924                         req ? req->mid : 0, NO_OPLOCK);
2925
2926         /* For directories the delete on close bit at open time seems
2927            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2928         if (create_options & FILE_DELETE_ON_CLOSE) {
2929                 status = can_set_delete_on_close(fsp, 0);
2930                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2931                         TALLOC_FREE(lck);
2932                         fd_close(fsp);
2933                         file_free(req, fsp);
2934                         return status;
2935                 }
2936
2937                 if (NT_STATUS_IS_OK(status)) {
2938                         /* Note that here we set the *inital* delete on close flag,
2939                            not the regular one. The magic gets handled in close. */
2940                         fsp->initial_delete_on_close = True;
2941                 }
2942         }
2943
2944         TALLOC_FREE(lck);
2945
2946         if (pinfo) {
2947                 *pinfo = info;
2948         }
2949
2950         *result = fsp;
2951         return NT_STATUS_OK;
2952 }
2953
2954 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2955                           struct smb_filename *smb_dname)
2956 {
2957         NTSTATUS status;
2958         files_struct *fsp;
2959
2960         status = SMB_VFS_CREATE_FILE(
2961                 conn,                                   /* conn */
2962                 req,                                    /* req */
2963                 0,                                      /* root_dir_fid */
2964                 smb_dname,                              /* fname */
2965                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2966                 FILE_SHARE_NONE,                        /* share_access */
2967                 FILE_CREATE,                            /* create_disposition*/
2968                 FILE_DIRECTORY_FILE,                    /* create_options */
2969                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2970                 0,                                      /* oplock_request */
2971                 0,                                      /* allocation_size */
2972                 0,                                      /* private_flags */
2973                 NULL,                                   /* sd */
2974                 NULL,                                   /* ea_list */
2975                 &fsp,                                   /* result */
2976                 NULL);                                  /* pinfo */
2977
2978         if (NT_STATUS_IS_OK(status)) {
2979                 close_file(req, fsp, NORMAL_CLOSE);
2980         }
2981
2982         return status;
2983 }
2984
2985 /****************************************************************************
2986  Receive notification that one of our open files has been renamed by another
2987  smbd process.
2988 ****************************************************************************/
2989
2990 void msg_file_was_renamed(struct messaging_context *msg,
2991                           void *private_data,
2992                           uint32_t msg_type,
2993                           struct server_id server_id,
2994                           DATA_BLOB *data)
2995 {
2996         struct smbd_server_connection *sconn;
2997         files_struct *fsp;
2998         char *frm = (char *)data->data;
2999         struct file_id id;
3000         const char *sharepath;
3001         const char *base_name;
3002         const char *stream_name;
3003         struct smb_filename *smb_fname = NULL;
3004         size_t sp_len, bn_len;
3005         NTSTATUS status;
3006
3007         sconn = msg_ctx_to_sconn(msg);
3008         if (sconn == NULL) {
3009                 DEBUG(1, ("could not find sconn\n"));
3010                 return;
3011         }
3012
3013         if (data->data == NULL
3014             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3015                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3016                           (int)data->length));
3017                 return;
3018         }
3019
3020         /* Unpack the message. */
3021         pull_file_id_24(frm, &id);
3022         sharepath = &frm[24];
3023         sp_len = strlen(sharepath);
3024         base_name = sharepath + sp_len + 1;
3025         bn_len = strlen(base_name);
3026         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3027
3028         /* stream_name must always be NULL if there is no stream. */
3029         if (stream_name[0] == '\0') {
3030                 stream_name = NULL;
3031         }
3032
3033         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3034                                             stream_name, NULL, &smb_fname);
3035         if (!NT_STATUS_IS_OK(status)) {
3036                 return;
3037         }
3038
3039         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3040                 "file_id %s\n",
3041                 sharepath, smb_fname_str_dbg(smb_fname),
3042                 file_id_string_tos(&id)));
3043
3044         for(fsp = file_find_di_first(sconn, id); fsp;
3045             fsp = file_find_di_next(fsp)) {
3046                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3047
3048                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3049                                 fsp->fnum, fsp_str_dbg(fsp),
3050                                 smb_fname_str_dbg(smb_fname)));
3051                         status = fsp_set_smb_fname(fsp, smb_fname);
3052                         if (!NT_STATUS_IS_OK(status)) {
3053                                 goto out;
3054                         }
3055                 } else {
3056                         /* TODO. JRA. */
3057                         /* Now we have the complete path we can work out if this is
3058                            actually within this share and adjust newname accordingly. */
3059                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3060                                 "not sharepath %s) "
3061                                 "fnum %d from %s -> %s\n",
3062                                 fsp->conn->connectpath,
3063                                 sharepath,
3064                                 fsp->fnum,
3065                                 fsp_str_dbg(fsp),
3066                                 smb_fname_str_dbg(smb_fname)));
3067                 }
3068         }
3069  out:
3070         TALLOC_FREE(smb_fname);
3071         return;
3072 }
3073
3074 /*
3075  * If a main file is opened for delete, all streams need to be checked for
3076  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3077  * If that works, delete them all by setting the delete on close and close.
3078  */
3079
3080 NTSTATUS open_streams_for_delete(connection_struct *conn,
3081                                         const char *fname)
3082 {
3083         struct stream_struct *stream_info = NULL;
3084         files_struct **streams = NULL;
3085         int i;
3086         unsigned int num_streams = 0;
3087         TALLOC_CTX *frame = talloc_stackframe();
3088         NTSTATUS status;
3089
3090         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3091                                 &num_streams, &stream_info);
3092
3093         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3094             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3095                 DEBUG(10, ("no streams around\n"));
3096                 TALLOC_FREE(frame);
3097                 return NT_STATUS_OK;
3098         }
3099
3100         if (!NT_STATUS_IS_OK(status)) {
3101                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3102                            nt_errstr(status)));
3103                 goto fail;
3104         }
3105
3106         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3107                    num_streams));
3108
3109         if (num_streams == 0) {
3110                 TALLOC_FREE(frame);
3111                 return NT_STATUS_OK;
3112         }
3113
3114         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3115         if (streams == NULL) {
3116                 DEBUG(0, ("talloc failed\n"));
3117                 status = NT_STATUS_NO_MEMORY;
3118                 goto fail;
3119         }
3120
3121         for (i=0; i<num_streams; i++) {
3122                 struct smb_filename *smb_fname = NULL;
3123
3124                 if (strequal(stream_info[i].name, "::$DATA")) {
3125                         streams[i] = NULL;
3126                         continue;
3127                 }
3128
3129                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3130                                                     stream_info[i].name,
3131                                                     NULL, &smb_fname);
3132                 if (!NT_STATUS_IS_OK(status)) {
3133                         goto fail;
3134                 }
3135
3136                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3137                         DEBUG(10, ("Unable to stat stream: %s\n",
3138                                    smb_fname_str_dbg(smb_fname)));
3139                 }
3140
3141                 status = SMB_VFS_CREATE_FILE(
3142                          conn,                  /* conn */
3143                          NULL,                  /* req */
3144                          0,                     /* root_dir_fid */
3145                          smb_fname,             /* fname */
3146                          DELETE_ACCESS,         /* access_mask */
3147                          (FILE_SHARE_READ |     /* share_access */
3148                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3149                          FILE_OPEN,             /* create_disposition*/
3150                          0,                     /* create_options */
3151                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3152                          0,                     /* oplock_request */
3153                          0,                     /* allocation_size */
3154                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3155                          NULL,                  /* sd */
3156                          NULL,                  /* ea_list */
3157                          &streams[i],           /* result */
3158                          NULL);                 /* pinfo */
3159
3160                 if (!NT_STATUS_IS_OK(status)) {
3161                         DEBUG(10, ("Could not open stream %s: %s\n",
3162                                    smb_fname_str_dbg(smb_fname),
3163                                    nt_errstr(status)));
3164
3165                         TALLOC_FREE(smb_fname);
3166                         break;
3167                 }
3168                 TALLOC_FREE(smb_fname);
3169         }
3170
3171         /*
3172          * don't touch the variable "status" beyond this point :-)
3173          */
3174
3175         for (i -= 1 ; i >= 0; i--) {
3176                 if (streams[i] == NULL) {
3177                         continue;
3178                 }
3179
3180                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3181                            fsp_str_dbg(streams[i])));
3182                 close_file(NULL, streams[i], NORMAL_CLOSE);
3183         }
3184
3185  fail:
3186         TALLOC_FREE(frame);
3187         return status;
3188 }
3189
3190 /*
3191  * Wrapper around open_file_ntcreate and open_directory
3192  */
3193
3194 static NTSTATUS create_file_unixpath(connection_struct *conn,
3195                                      struct smb_request *req,
3196                                      struct smb_filename *smb_fname,
3197                                      uint32_t access_mask,
3198                                      uint32_t share_access,
3199                                      uint32_t create_disposition,
3200                                      uint32_t create_options,
3201                                      uint32_t file_attributes,
3202                                      uint32_t oplock_request,
3203                                      uint64_t allocation_size,
3204                                      uint32_t private_flags,
3205                                      struct security_descriptor *sd,
3206                                      struct ea_list *ea_list,
3207
3208                                      files_struct **result,
3209                                      int *pinfo)
3210 {
3211         int info = FILE_WAS_OPENED;
3212         files_struct *base_fsp = NULL;
3213         files_struct *fsp = NULL;
3214         NTSTATUS status;
3215
3216         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3217                   "file_attributes = 0x%x, share_access = 0x%x, "
3218                   "create_disposition = 0x%x create_options = 0x%x "
3219                   "oplock_request = 0x%x private_flags = 0x%x "
3220                   "ea_list = 0x%p, sd = 0x%p, "
3221                   "fname = %s\n",
3222                   (unsigned int)access_mask,
3223                   (unsigned int)file_attributes,
3224                   (unsigned int)share_access,
3225                   (unsigned int)create_disposition,
3226                   (unsigned int)create_options,
3227                   (unsigned int)oplock_request,
3228                   (unsigned int)private_flags,
3229                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3230
3231         if (create_options & FILE_OPEN_BY_FILE_ID) {
3232                 status = NT_STATUS_NOT_SUPPORTED;
3233                 goto fail;
3234         }
3235
3236         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3237                 status = NT_STATUS_INVALID_PARAMETER;
3238                 goto fail;
3239         }
3240
3241         if (req == NULL) {
3242                 oplock_request |= INTERNAL_OPEN_ONLY;
3243         }
3244
3245         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3246             && (access_mask & DELETE_ACCESS)
3247             && !is_ntfs_stream_smb_fname(smb_fname)) {
3248                 /*
3249                  * We can't open a file with DELETE access if any of the
3250                  * streams is open without FILE_SHARE_DELETE
3251                  */
3252                 status = open_streams_for_delete(conn, smb_fname->base_name);
3253
3254                 if (!NT_STATUS_IS_OK(status)) {
3255                         goto fail;
3256                 }
3257         }
3258
3259         /* This is the correct thing to do (check every time) but can_delete
3260          * is expensive (it may have to read the parent directory
3261          * permissions). So for now we're not doing it unless we have a strong
3262          * hint the client is really going to delete this file. If the client
3263          * is forcing FILE_CREATE let the filesystem take care of the
3264          * permissions. */
3265
3266         /* Setting FILE_SHARE_DELETE is the hint. */
3267
3268         if ((create_disposition != FILE_CREATE)
3269             && (access_mask & DELETE_ACCESS)
3270             && (!(can_delete_file_in_directory(conn, smb_fname) ||
3271                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3272                 status = NT_STATUS_ACCESS_DENIED;
3273                 DEBUG(10,("create_file_unixpath: open file %s "
3274                           "for delete ACCESS_DENIED\n",
3275                           smb_fname_str_dbg(smb_fname)));
3276                 goto fail;
3277         }
3278
3279         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3280                         !security_token_has_privilege(get_current_nttok(conn),
3281                                         SEC_PRIV_SECURITY)) {
3282                 DEBUG(10, ("create_file_unixpath: open on %s "
3283                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3284                         smb_fname_str_dbg(smb_fname)));
3285                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3286                 goto fail;
3287         }
3288
3289         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3290             && is_ntfs_stream_smb_fname(smb_fname)
3291             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3292                 uint32 base_create_disposition;
3293                 struct smb_filename *smb_fname_base = NULL;
3294
3295                 if (create_options & FILE_DIRECTORY_FILE) {
3296                         status = NT_STATUS_NOT_A_DIRECTORY;
3297                         goto fail;
3298                 }
3299
3300                 switch (create_disposition) {
3301                 case FILE_OPEN:
3302                         base_create_disposition = FILE_OPEN;
3303                         break;
3304                 default:
3305                         base_create_disposition = FILE_OPEN_IF;
3306                         break;
3307                 }
3308
3309                 /* Create an smb_filename with stream_name == NULL. */
3310                 status = create_synthetic_smb_fname(talloc_tos(),
3311                                                     smb_fname->base_name,
3312                                                     NULL, NULL,
3313                                                     &smb_fname_base);
3314                 if (!NT_STATUS_IS_OK(status)) {
3315                         goto fail;
3316                 }
3317
3318                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3319                         DEBUG(10, ("Unable to stat stream: %s\n",
3320                                    smb_fname_str_dbg(smb_fname_base)));
3321                 }
3322
3323                 /* Open the base file. */
3324                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3325                                               FILE_SHARE_READ
3326                                               | FILE_SHARE_WRITE
3327                                               | FILE_SHARE_DELETE,
3328                                               base_create_disposition,
3329                                               0, 0, 0, 0, 0, NULL, NULL,
3330                                               &base_fsp, NULL);
3331                 TALLOC_FREE(smb_fname_base);
3332
3333                 if (!NT_STATUS_IS_OK(status)) {
3334                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3335                                    "%s\n", smb_fname->base_name,
3336                                    nt_errstr(status)));
3337                         goto fail;
3338                 }
3339                 /* we don't need to low level fd */
3340                 fd_close(base_fsp);
3341         }
3342
3343         /*
3344          * If it's a request for a directory open, deal with it separately.
3345          */
3346
3347         if (create_options & FILE_DIRECTORY_FILE) {
3348
3349                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3350                         status = NT_STATUS_INVALID_PARAMETER;
3351                         goto fail;
3352                 }
3353
3354                 /* Can't open a temp directory. IFS kit test. */
3355                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3356                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3357                         status = NT_STATUS_INVALID_PARAMETER;
3358                         goto fail;
3359                 }
3360
3361                 /*
3362                  * We will get a create directory here if the Win32
3363                  * app specified a security descriptor in the
3364                  * CreateDirectory() call.
3365                  */
3366
3367                 oplock_request = 0;
3368                 status = open_directory(
3369                         conn, req, smb_fname, access_mask, share_access,
3370                         create_disposition, create_options, file_attributes,
3371                         &info, &fsp);
3372         } else {
3373
3374                 /*
3375                  * Ordinary file case.
3376                  */
3377
3378                 status = file_new(req, conn, &fsp);
3379                 if(!NT_STATUS_IS_OK(status)) {
3380                         goto fail;
3381                 }
3382
3383                 status = fsp_set_smb_fname(fsp, smb_fname);
3384                 if (!NT_STATUS_IS_OK(status)) {
3385                         goto fail;
3386                 }
3387
3388                 /*
3389                  * We're opening the stream element of a base_fsp
3390                  * we already opened. Set up the base_fsp pointer.
3391                  */
3392                 if (base_fsp) {
3393                         fsp->base_fsp = base_fsp;
3394                 }
3395
3396                 status = open_file_ntcreate(conn,
3397                                             req,
3398                                             access_mask,
3399                                             share_access,
3400                                             create_disposition,
3401                                             create_options,
3402                                             file_attributes,
3403                                             oplock_request,
3404                                             private_flags,
3405                                             &info,
3406                                             fsp);
3407
3408                 if(!NT_STATUS_IS_OK(status)) {
3409                         file_free(req, fsp);
3410                         fsp = NULL;
3411                 }
3412
3413                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3414
3415                         /* A stream open never opens a directory */
3416
3417                         if (base_fsp) {
3418                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3419                                 goto fail;
3420                         }
3421
3422                         /*
3423                          * Fail the open if it was explicitly a non-directory
3424                          * file.
3425                          */
3426
3427                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3428                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3429                                 goto fail;
3430                         }
3431
3432                         oplock_request = 0;
3433                         status = open_directory(
3434                                 conn, req, smb_fname, access_mask,
3435                                 share_access, create_disposition,
3436                                 create_options, file_attributes,
3437                                 &info, &fsp);
3438                 }
3439         }
3440
3441         if (!NT_STATUS_IS_OK(status)) {
3442                 goto fail;
3443         }
3444
3445         fsp->base_fsp = base_fsp;
3446
3447         /*
3448          * According to the MS documentation, the only time the security
3449          * descriptor is applied to the opened file is iff we *created* the
3450          * file; an existing file stays the same.
3451          *
3452          * Also, it seems (from observation) that you can open the file with
3453          * any access mask but you can still write the sd. We need to override
3454          * the granted access before we call set_sd
3455          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3456          */
3457
3458         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3459             && lp_nt_acl_support(SNUM(conn))) {
3460
3461                 uint32_t sec_info_sent;
3462                 uint32_t saved_access_mask = fsp->access_mask;
3463
3464                 sec_info_sent = get_sec_info(sd);
3465
3466                 fsp->access_mask = FILE_GENERIC_ALL;
3467
3468                 /* Convert all the generic bits. */
3469                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3470                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3471
3472                 if (sec_info_sent & (SECINFO_OWNER|
3473                                         SECINFO_GROUP|
3474                                         SECINFO_DACL|
3475                                         SECINFO_SACL)) {
3476                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3477                 }
3478
3479                 fsp->access_mask = saved_access_mask;
3480
3481                 if (!NT_STATUS_IS_OK(status)) {
3482                         goto fail;
3483                 }
3484         }
3485
3486         if ((ea_list != NULL) &&
3487             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3488                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3489                 if (!NT_STATUS_IS_OK(status)) {
3490                         goto fail;
3491                 }
3492         }
3493
3494         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3495                 status = NT_STATUS_ACCESS_DENIED;
3496                 goto fail;
3497         }
3498
3499         /* Save the requested allocation size. */
3500         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3501                 if (allocation_size
3502                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3503                         fsp->initial_allocation_size = smb_roundup(
3504                                 fsp->conn, allocation_size);
3505                         if (fsp->is_directory) {
3506                                 /* Can't set allocation size on a directory. */
3507                                 status = NT_STATUS_ACCESS_DENIED;
3508                                 goto fail;
3509                         }
3510                         if (vfs_allocate_file_space(
3511                                     fsp, fsp->initial_allocation_size) == -1) {
3512                                 status = NT_STATUS_DISK_FULL;
3513                                 goto fail;
3514                         }
3515                 } else {
3516                         fsp->initial_allocation_size = smb_roundup(
3517                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3518                 }
3519         }
3520
3521         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3522
3523         *result = fsp;
3524         if (pinfo != NULL) {
3525                 *pinfo = info;
3526         }
3527
3528         smb_fname->st = fsp->fsp_name->st;
3529
3530         return NT_STATUS_OK;
3531
3532  fail:
3533         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3534
3535         if (fsp != NULL) {
3536                 if (base_fsp && fsp->base_fsp == base_fsp) {
3537                         /*
3538                          * The close_file below will close
3539                          * fsp->base_fsp.
3540                          */
3541                         base_fsp = NULL;
3542                 }
3543                 close_file(req, fsp, ERROR_CLOSE);
3544                 fsp = NULL;
3545         }
3546         if (base_fsp != NULL) {
3547                 close_file(req, base_fsp, ERROR_CLOSE);
3548                 base_fsp = NULL;
3549         }
3550         return status;
3551 }
3552
3553 /*
3554  * Calculate the full path name given a relative fid.
3555  */
3556 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3557                                    struct smb_request *req,
3558                                    uint16_t root_dir_fid,
3559                                    const struct smb_filename *smb_fname,
3560                                    struct smb_filename **smb_fname_out)
3561 {
3562         files_struct *dir_fsp;
3563         char *parent_fname = NULL;
3564         char *new_base_name = NULL;
3565         NTSTATUS status;
3566
3567         if (root_dir_fid == 0 || !smb_fname) {
3568                 status = NT_STATUS_INTERNAL_ERROR;
3569                 goto out;
3570         }
3571
3572         dir_fsp = file_fsp(req, root_dir_fid);
3573
3574         if (dir_fsp == NULL) {
3575                 status = NT_STATUS_INVALID_HANDLE;
3576                 goto out;
3577         }
3578
3579         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3580                 status = NT_STATUS_INVALID_HANDLE;
3581                 goto out;
3582         }
3583
3584         if (!dir_fsp->is_directory) {
3585
3586                 /*
3587                  * Check to see if this is a mac fork of some kind.
3588                  */
3589
3590                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3591                     is_ntfs_stream_smb_fname(smb_fname)) {
3592                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3593                         goto out;
3594                 }
3595
3596                 /*
3597                   we need to handle the case when we get a
3598                   relative open relative to a file and the
3599                   pathname is blank - this is a reopen!
3600                   (hint from demyn plantenberg)
3601                 */
3602
3603                 status = NT_STATUS_INVALID_HANDLE;
3604                 goto out;
3605         }
3606
3607         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3608                 /*
3609                  * We're at the toplevel dir, the final file name
3610                  * must not contain ./, as this is filtered out
3611                  * normally by srvstr_get_path and unix_convert
3612                  * explicitly rejects paths containing ./.
3613                  */
3614                 parent_fname = talloc_strdup(talloc_tos(), "");
3615                 if (parent_fname == NULL) {
3616                         status = NT_STATUS_NO_MEMORY;
3617                         goto out;
3618                 }
3619         } else {
3620                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3621
3622                 /*
3623                  * Copy in the base directory name.
3624                  */
3625
3626                 parent_fname = talloc_array(talloc_tos(), char,
3627                     dir_name_len+2);
3628                 if (parent_fname == NULL) {
3629                         status = NT_STATUS_NO_MEMORY;
3630                         goto out;
3631                 }
3632                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3633                     dir_name_len+1);
3634
3635                 /*
3636                  * Ensure it ends in a '/'.
3637                  * We used TALLOC_SIZE +2 to add space for the '/'.
3638                  */
3639
3640                 if(dir_name_len
3641                     && (parent_fname[dir_name_len-1] != '\\')
3642                     && (parent_fname[dir_name_len-1] != '/')) {
3643                         parent_fname[dir_name_len] = '/';
3644                         parent_fname[dir_name_len+1] = '\0';
3645                 }
3646         }
3647
3648         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3649                                         smb_fname->base_name);
3650         if (new_base_name == NULL) {
3651                 status = NT_STATUS_NO_MEMORY;
3652                 goto out;
3653         }
3654
3655         status = filename_convert(req,
3656                                 conn,
3657                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3658                                 new_base_name,
3659                                 0,
3660                                 NULL,
3661                                 smb_fname_out);
3662         if (!NT_STATUS_IS_OK(status)) {
3663                 goto out;
3664         }
3665
3666  out:
3667         TALLOC_FREE(parent_fname);
3668         TALLOC_FREE(new_base_name);
3669         return status;
3670 }
3671
3672 NTSTATUS create_file_default(connection_struct *conn,
3673                              struct smb_request *req,
3674                              uint16_t root_dir_fid,
3675                              struct smb_filename *smb_fname,
3676                              uint32_t access_mask,
3677                              uint32_t share_access,
3678                              uint32_t create_disposition,
3679                              uint32_t create_options,
3680                              uint32_t file_attributes,
3681                              uint32_t oplock_request,
3682                              uint64_t allocation_size,
3683                              uint32_t private_flags,
3684                              struct security_descriptor *sd,
3685                              struct ea_list *ea_list,
3686                              files_struct **result,
3687                              int *pinfo)
3688 {
3689         int info = FILE_WAS_OPENED;
3690         files_struct *fsp = NULL;
3691         NTSTATUS status;
3692         bool stream_name = false;
3693
3694         DEBUG(10,("create_file: access_mask = 0x%x "
3695                   "file_attributes = 0x%x, share_access = 0x%x, "
3696                   "create_disposition = 0x%x create_options = 0x%x "
3697                   "oplock_request = 0x%x "
3698                   "private_flags = 0x%x "
3699                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3700                   "fname = %s\n",
3701                   (unsigned int)access_mask,
3702                   (unsigned int)file_attributes,
3703                   (unsigned int)share_access,
3704                   (unsigned int)create_disposition,
3705                   (unsigned int)create_options,
3706                   (unsigned int)oplock_request,
3707                   (unsigned int)private_flags,
3708                   (unsigned int)root_dir_fid,
3709                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3710
3711         /*
3712          * Calculate the filename from the root_dir_if if necessary.
3713          */
3714
3715         if (root_dir_fid != 0) {
3716                 struct smb_filename *smb_fname_out = NULL;
3717                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3718                                                    smb_fname, &smb_fname_out);
3719                 if (!NT_STATUS_IS_OK(status)) {
3720                         goto fail;
3721                 }
3722                 smb_fname = smb_fname_out;
3723         }
3724
3725         /*
3726          * Check to see if this is a mac fork of some kind.
3727          */
3728
3729         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3730         if (stream_name) {
3731                 enum FAKE_FILE_TYPE fake_file_type;
3732
3733                 fake_file_type = is_fake_file(smb_fname);
3734
3735                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3736
3737                         /*
3738                          * Here we go! support for changing the disk quotas
3739                          * --metze
3740                          *
3741                          * We need to fake up to open this MAGIC QUOTA file
3742                          * and return a valid FID.
3743                          *
3744                          * w2k close this file directly after openening xp
3745                          * also tries a QUERY_FILE_INFO on the file and then
3746                          * close it
3747                          */
3748                         status = open_fake_file(req, conn, req->vuid,
3749                                                 fake_file_type, smb_fname,
3750                                                 access_mask, &fsp);
3751                         if (!NT_STATUS_IS_OK(status)) {
3752                                 goto fail;
3753                         }
3754
3755                         ZERO_STRUCT(smb_fname->st);
3756                         goto done;
3757                 }
3758
3759                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3760                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3761                         goto fail;
3762                 }
3763         }
3764
3765         /* All file access must go through check_name() */
3766
3767         status = check_name(conn, smb_fname->base_name);
3768         if (!NT_STATUS_IS_OK(status)) {
3769                 goto fail;
3770         }
3771
3772         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3773                 int ret;
3774                 smb_fname->stream_name = NULL;
3775                 /* We have to handle this error here. */
3776                 if (create_options & FILE_DIRECTORY_FILE) {
3777                         status = NT_STATUS_NOT_A_DIRECTORY;
3778                         goto fail;
3779                 }
3780                 if (lp_posix_pathnames()) {
3781                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3782                 } else {
3783                         ret = SMB_VFS_STAT(conn, smb_fname);
3784                 }
3785
3786                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3787                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3788                         goto fail;
3789                 }
3790         }
3791
3792         status = create_file_unixpath(
3793                 conn, req, smb_fname, access_mask, share_access,
3794                 create_disposition, create_options, file_attributes,
3795                 oplock_request, allocation_size, private_flags,
3796                 sd, ea_list,
3797                 &fsp, &info);
3798
3799         if (!NT_STATUS_IS_OK(status)) {
3800                 goto fail;
3801         }
3802
3803  done:
3804         DEBUG(10, ("create_file: info=%d\n", info));
3805
3806         *result = fsp;
3807         if (pinfo != NULL) {
3808                 *pinfo = info;
3809         }
3810         return NT_STATUS_OK;
3811
3812  fail:
3813         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3814
3815         if (fsp != NULL) {
3816                 close_file(req, fsp, ERROR_CLOSE);
3817                 fsp = NULL;
3818         }
3819         return status;
3820 }