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 static 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         return se_access_check(sd,
  53                                 token,
  54                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  55                                 access_granted);
  56 }
  57
  58 /****************************************************************************
  59  If the requester wanted DELETE_ACCESS and was rejected because
  60  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  61  ovverrides this.
  62 ****************************************************************************/
  63
  64 static bool parent_override_delete(connection_struct *conn,
  65                                         struct smb_filename *smb_fname,
  66                                         uint32_t access_mask,
  67                                         uint32_t rejected_mask)
  68 {
  69         if ((access_mask & DELETE_ACCESS) &&
  70                     (rejected_mask & DELETE_ACCESS) &&
  71                     can_delete_file_in_directory(conn, smb_fname)) {
  72                 return true;
  73         }
  74         return false;
  75 }
  76
  77 /****************************************************************************
  78  Check if we have open rights.
  79 ****************************************************************************/
  80
  81 static NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  82                                 struct smb_filename *smb_fname,
  83                                 uint32_t access_mask)
  84 {
  85         /* Check if we have rights to open. */
  86         NTSTATUS status;
  87         struct security_descriptor *sd = NULL;
  88         uint32_t rejected_share_access;
  89         uint32_t rejected_mask = 0;
  90
  91         rejected_share_access = access_mask & ~(conn->share_access);
  92
  93         if (rejected_share_access) {
  94                 DEBUG(10, ("smbd_check_open_rights: rejected share access 0x%x "
  95                         "on %s (0x%x)\n",
  96                         (unsigned int)access_mask,
  97                         smb_fname_str_dbg(smb_fname),
  98                         (unsigned int)rejected_share_access ));
  99                 return NT_STATUS_ACCESS_DENIED;
 100         }
 101
 102         if (get_current_uid(conn) == (uid_t)0) {
 103                 /* I'm sorry sir, I didn't know you were root... */
 104                 DEBUG(10,("smbd_check_open_rights: root override "
 105                         "on %s. Granting 0x%x\n",
 106                         smb_fname_str_dbg(smb_fname),
 107                         (unsigned int)access_mask ));
 108                 return NT_STATUS_OK;
 109         }
 110
 111         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
 112                 DEBUG(10,("smbd_check_open_rights: not checking ACL "
 113                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
 114                         smb_fname_str_dbg(smb_fname),
 115                         (unsigned int)access_mask ));
 116                 return NT_STATUS_OK;
 117         }
 118
 119         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 120                         (SECINFO_OWNER |
 121                         SECINFO_GROUP |
 122                         SECINFO_DACL),&sd);
 123
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
 126                         "on %s: %s\n",
 127                         smb_fname_str_dbg(smb_fname),
 128                         nt_errstr(status)));
 129                 return status;
 130         }
 131
 132         status = smb1_file_se_access_check(conn,
 133                                 sd,
 134                                 get_current_nttok(conn),
 135                                 access_mask,
 136                                 &rejected_mask);
 137
 138         DEBUG(10,("smbd_check_open_rights: file %s requesting "
 139                 "0x%x returning 0x%x (%s)\n",
 140                 smb_fname_str_dbg(smb_fname),
 141                 (unsigned int)access_mask,
 142                 (unsigned int)rejected_mask,
 143                 nt_errstr(status) ));
 144
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 if (DEBUGLEVEL >= 10) {
 147                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 148                                 smb_fname_str_dbg(smb_fname) ));
 149                         NDR_PRINT_DEBUG(security_descriptor, sd);
 150                 }
 151         }
 152
 153         TALLOC_FREE(sd);
 154
 155         if (NT_STATUS_IS_OK(status) ||
 156                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 157                 return status;
 158         }
 159
 160         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 161         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 162                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 163                         (lp_map_readonly(SNUM(conn)) ||
 164                         lp_map_archive(SNUM(conn)) ||
 165                         lp_map_hidden(SNUM(conn)) ||
 166                         lp_map_system(SNUM(conn)))) {
 167                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 168
 169                 DEBUG(10,("smbd_check_open_rights: "
 170                         "overrode "
 171                         "FILE_WRITE_ATTRIBUTES "
 172                         "on file %s\n",
 173                         smb_fname_str_dbg(smb_fname)));
 174         }
 175
 176         if (parent_override_delete(conn,
 177                                 smb_fname,
 178                                 access_mask,
 179                                 rejected_mask)) {
 180                 /* Were we trying to do an open
 181                  * for delete and didn't get DELETE
 182                  * access (only) ? Check if the
 183                  * directory allows DELETE_CHILD.
 184                  * See here:
 185                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 186                  * for details. */
 187
 188                 rejected_mask &= ~DELETE_ACCESS;
 189
 190                 DEBUG(10,("smbd_check_open_rights: "
 191                         "overrode "
 192                         "DELETE_ACCESS on "
 193                         "file %s\n",
 194                         smb_fname_str_dbg(smb_fname)));
 195         }
 196
 197         if (rejected_mask != 0) {
 198                 return NT_STATUS_ACCESS_DENIED;
 199         } else {
 200                 return NT_STATUS_OK;
 201         }
 202 }
 203
 204 static NTSTATUS check_parent_access(struct connection_struct *conn,
 205                                 struct smb_filename *smb_fname,
 206                                 uint32_t access_mask,
 207                                 char **pp_parent_dir)
 208 {
 209         NTSTATUS status;
 210         char *parent_dir = NULL;
 211         struct security_descriptor *parent_sd = NULL;
 212         uint32_t access_granted = 0;
 213
 214         if (!parent_dirname(talloc_tos(),
 215                                 smb_fname->base_name,
 216                                 &parent_dir,
 217                                 NULL)) {
 218                 return NT_STATUS_NO_MEMORY;
 219         }
 220
 221         if (pp_parent_dir) {
 222                 *pp_parent_dir = parent_dir;
 223         }
 224
 225         if (get_current_uid(conn) == (uid_t)0) {
 226                 /* I'm sorry sir, I didn't know you were root... */
 227                 DEBUG(10,("check_parent_access: root override "
 228                         "on %s. Granting 0x%x\n",
 229                         smb_fname_str_dbg(smb_fname),
 230                         (unsigned int)access_mask ));
 231                 return NT_STATUS_OK;
 232         }
 233
 234         status = SMB_VFS_GET_NT_ACL(conn,
 235                                 parent_dir,
 236                                 SECINFO_DACL,
 237                                 &parent_sd);
 238
 239         if (!NT_STATUS_IS_OK(status)) {
 240                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 241                         "%s with error %s\n",
 242                         parent_dir,
 243                         nt_errstr(status)));
 244                 return status;
 245         }
 246
 247         status = smb1_file_se_access_check(conn,
 248                                         parent_sd,
 249                                         get_current_nttok(conn),
 250                                         access_mask,
 251                                         &access_granted);
 252         if(!NT_STATUS_IS_OK(status)) {
 253                 DEBUG(5,("check_parent_access: access check "
 254                         "on directory %s for "
 255                         "path %s for mask 0x%x returned (0x%x) %s\n",
 256                         parent_dir,
 257                         smb_fname->base_name,
 258                         access_mask,
 259                         access_granted,
 260                         nt_errstr(status) ));
 261                 return status;
 262         }
 263
 264         return NT_STATUS_OK;
 265 }
 266
 267 /****************************************************************************
 268  fd support routines - attempt to do a dos_open.
 269 ****************************************************************************/
 270
 271 static NTSTATUS fd_open(struct connection_struct *conn,
 272                     files_struct *fsp,
 273                     int flags,
 274                     mode_t mode)
 275 {
 276         struct smb_filename *smb_fname = fsp->fsp_name;
 277         NTSTATUS status = NT_STATUS_OK;
 278
 279 #ifdef O_NOFOLLOW
 280         /*
 281          * Never follow symlinks on a POSIX client. The
 282          * client should be doing this.
 283          */
 284
 285         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 286                 flags |= O_NOFOLLOW;
 287         }
 288 #endif
 289
 290         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 291         if (fsp->fh->fd == -1) {
 292                 status = map_nt_error_from_unix(errno);
 293                 if (errno == EMFILE) {
 294                         static time_t last_warned = 0L;
 295
 296                         if (time((time_t *) NULL) > last_warned) {
 297                                 DEBUG(0,("Too many open files, unable "
 298                                         "to open more!  smbd's max "
 299                                         "open files = %d\n",
 300                                         lp_max_open_files()));
 301                                 last_warned = time((time_t *) NULL);
 302                         }
 303                 }
 304
 305         }
 306
 307         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 308                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 309                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 310
 311         return status;
 312 }
 313
 314 /****************************************************************************
 315  Close the file associated with a fsp.
 316 ****************************************************************************/
 317
 318 NTSTATUS fd_close(files_struct *fsp)
 319 {
 320         int ret;
 321
 322         if (fsp->dptr) {
 323                 dptr_CloseDir(fsp);
 324         }
 325         if (fsp->fh->fd == -1) {
 326                 return NT_STATUS_OK; /* What we used to call a stat open. */
 327         }
 328         if (fsp->fh->ref_count > 1) {
 329                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 330         }
 331
 332         ret = SMB_VFS_CLOSE(fsp);
 333         fsp->fh->fd = -1;
 334         if (ret == -1) {
 335                 return map_nt_error_from_unix(errno);
 336         }
 337         return NT_STATUS_OK;
 338 }
 339
 340 /****************************************************************************
 341  Change the ownership of a file to that of the parent directory.
 342  Do this by fd if possible.
 343 ****************************************************************************/
 344
 345 void change_file_owner_to_parent(connection_struct *conn,
 346                                         const char *inherit_from_dir,
 347                                         files_struct *fsp)
 348 {
 349         struct smb_filename *smb_fname_parent = NULL;
 350         NTSTATUS status;
 351         int ret;
 352
 353         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 354                                             NULL, NULL, &smb_fname_parent);
 355         if (!NT_STATUS_IS_OK(status)) {
 356                 return;
 357         }
 358
 359         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 360         if (ret == -1) {
 361                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 362                          "directory %s. Error was %s\n",
 363                          smb_fname_str_dbg(smb_fname_parent),
 364                          strerror(errno)));
 365                 TALLOC_FREE(smb_fname_parent);
 366                 return;
 367         }
 368
 369         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 370                 /* Already this uid - no need to change. */
 371                 DEBUG(10,("change_file_owner_to_parent: file %s "
 372                         "is already owned by uid %d\n",
 373                         fsp_str_dbg(fsp),
 374                         (int)fsp->fsp_name->st.st_ex_uid ));
 375                 TALLOC_FREE(smb_fname_parent);
 376                 return;
 377         }
 378
 379         become_root();
 380         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 381         unbecome_root();
 382         if (ret == -1) {
 383                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 384                          "file %s to parent directory uid %u. Error "
 385                          "was %s\n", fsp_str_dbg(fsp),
 386                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 387                          strerror(errno) ));
 388         } else {
 389                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 390                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 391                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 392                 /* Ensure the uid entry is updated. */
 393                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 394         }
 395
 396         TALLOC_FREE(smb_fname_parent);
 397 }
 398
 399 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 400                                        const char *inherit_from_dir,
 401                                        const char *fname,
 402                                        SMB_STRUCT_STAT *psbuf)
 403 {
 404         struct smb_filename *smb_fname_parent = NULL;
 405         struct smb_filename *smb_fname_cwd = NULL;
 406         char *saved_dir = NULL;
 407         TALLOC_CTX *ctx = talloc_tos();
 408         NTSTATUS status = NT_STATUS_OK;
 409         int ret;
 410
 411         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 412                                             &smb_fname_parent);
 413         if (!NT_STATUS_IS_OK(status)) {
 414                 return status;
 415         }
 416
 417         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 418         if (ret == -1) {
 419                 status = map_nt_error_from_unix(errno);
 420                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 421                          "directory %s. Error was %s\n",
 422                          smb_fname_str_dbg(smb_fname_parent),
 423                          strerror(errno)));
 424                 goto out;
 425         }
 426
 427         /* We've already done an lstat into psbuf, and we know it's a
 428            directory. If we can cd into the directory and the dev/ino
 429            are the same then we can safely chown without races as
 430            we're locking the directory in place by being in it.  This
 431            should work on any UNIX (thanks tridge :-). JRA.
 432         */
 433
 434         saved_dir = vfs_GetWd(ctx,conn);
 435         if (!saved_dir) {
 436                 status = map_nt_error_from_unix(errno);
 437                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 438                          "current working directory. Error was %s\n",
 439                          strerror(errno)));
 440                 goto out;
 441         }
 442
 443         /* Chdir into the new path. */
 444         if (vfs_ChDir(conn, fname) == -1) {
 445                 status = map_nt_error_from_unix(errno);
 446                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 447                          "current working directory to %s. Error "
 448                          "was %s\n", fname, strerror(errno) ));
 449                 goto chdir;
 450         }
 451
 452         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 453                                             &smb_fname_cwd);
 454         if (!NT_STATUS_IS_OK(status)) {
 455                 return status;
 456         }
 457
 458         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 459         if (ret == -1) {
 460                 status = map_nt_error_from_unix(errno);
 461                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 462                          "directory '.' (%s) Error was %s\n",
 463                          fname, strerror(errno)));
 464                 goto chdir;
 465         }
 466
 467         /* Ensure we're pointing at the same place. */
 468         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 469             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 470                 DEBUG(0,("change_dir_owner_to_parent: "
 471                          "device/inode on directory %s changed. "
 472                          "Refusing to chown !\n", fname ));
 473                 status = NT_STATUS_ACCESS_DENIED;
 474                 goto chdir;
 475         }
 476
 477         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 478                 /* Already this uid - no need to change. */
 479                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 480                         "is already owned by uid %d\n",
 481                         fname,
 482                         (int)smb_fname_cwd->st.st_ex_uid ));
 483                 status = NT_STATUS_OK;
 484                 goto chdir;
 485         }
 486
 487         become_root();
 488         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 489                             (gid_t)-1);
 490         unbecome_root();
 491         if (ret == -1) {
 492                 status = map_nt_error_from_unix(errno);
 493                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 494                           "directory %s to parent directory uid %u. "
 495                           "Error was %s\n", fname,
 496                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 497                           strerror(errno) ));
 498         } else {
 499                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 500                         "directory %s to parent directory uid %u.\n",
 501                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 502                 /* Ensure the uid entry is updated. */
 503                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 504         }
 505
 506  chdir:
 507         vfs_ChDir(conn,saved_dir);
 508  out:
 509         TALLOC_FREE(smb_fname_parent);
 510         TALLOC_FREE(smb_fname_cwd);
 511         return status;
 512 }
 513
 514 /****************************************************************************
 515  Open a file.
 516 ****************************************************************************/
 517
 518 static NTSTATUS open_file(files_struct *fsp,
 519                           connection_struct *conn,
 520                           struct smb_request *req,
 521                           const char *parent_dir,
 522                           int flags,
 523                           mode_t unx_mode,
 524                           uint32 access_mask, /* client requested access mask. */
 525                           uint32 open_access_mask) /* what we're actually using in the open. */
 526 {
 527         struct smb_filename *smb_fname = fsp->fsp_name;
 528         NTSTATUS status = NT_STATUS_OK;
 529         int accmode = (flags & O_ACCMODE);
 530         int local_flags = flags;
 531         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 532         bool file_created = false;
 533
 534         fsp->fh->fd = -1;
 535         errno = EPERM;
 536
 537         /* Check permissions */
 538
 539         /*
 540          * This code was changed after seeing a client open request
 541          * containing the open mode of (DENY_WRITE/read-only) with
 542          * the 'create if not exist' bit set. The previous code
 543          * would fail to open the file read only on a read-only share
 544          * as it was checking the flags parameter  directly against O_RDONLY,
 545          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 546          * JRA.
 547          */
 548
 549         if (!CAN_WRITE(conn)) {
 550                 /* It's a read-only share - fail if we wanted to write. */
 551                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 552                         DEBUG(3,("Permission denied opening %s\n",
 553                                  smb_fname_str_dbg(smb_fname)));
 554                         return NT_STATUS_ACCESS_DENIED;
 555                 } else if(flags & O_CREAT) {
 556                         /* We don't want to write - but we must make sure that
 557                            O_CREAT doesn't create the file if we have write
 558                            access into the directory.
 559                         */
 560                         flags &= ~(O_CREAT|O_EXCL);
 561                         local_flags &= ~(O_CREAT|O_EXCL);
 562                 }
 563         }
 564
 565         /*
 566          * This little piece of insanity is inspired by the
 567          * fact that an NT client can open a file for O_RDONLY,
 568          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 569          * If the client *can* write to the file, then it expects to
 570          * truncate the file, even though it is opening for readonly.
 571          * Quicken uses this stupid trick in backup file creation...
 572          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 573          * for helping track this one down. It didn't bite us in 2.0.x
 574          * as we always opened files read-write in that release. JRA.
 575          */
 576
 577         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 578                 DEBUG(10,("open_file: truncate requested on read-only open "
 579                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 580                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 581         }
 582
 583         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 584             (!file_existed && (local_flags & O_CREAT)) ||
 585             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 586                 const char *wild;
 587
 588                 /*
 589                  * We can't actually truncate here as the file may be locked.
 590                  * open_file_ntcreate will take care of the truncate later. JRA.
 591                  */
 592
 593                 local_flags &= ~O_TRUNC;
 594
 595 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 596                 /*
 597                  * We would block on opening a FIFO with no one else on the
 598                  * other end. Do what we used to do and add O_NONBLOCK to the
 599                  * open flags. JRA.
 600                  */
 601
 602                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 603                         local_flags |= O_NONBLOCK;
 604                 }
 605 #endif
 606
 607                 /* Don't create files with Microsoft wildcard characters. */
 608                 if (fsp->base_fsp) {
 609                         /*
 610                          * wildcard characters are allowed in stream names
 611                          * only test the basefilename
 612                          */
 613                         wild = fsp->base_fsp->fsp_name->base_name;
 614                 } else {
 615                         wild = smb_fname->base_name;
 616                 }
 617                 if ((local_flags & O_CREAT) && !file_existed &&
 618                     ms_has_wild(wild))  {
 619                         return NT_STATUS_OBJECT_NAME_INVALID;
 620                 }
 621
 622                 /* Can we access this file ? */
 623                 if (!fsp->base_fsp) {
 624                         /* Only do this check on non-stream open. */
 625                         if (file_existed) {
 626                                 status = smbd_check_open_rights(conn,
 627                                                 smb_fname,
 628                                                 access_mask);
 629                         } else if (local_flags & O_CREAT){
 630                                 status = check_parent_access(conn,
 631                                                 smb_fname,
 632                                                 SEC_DIR_ADD_FILE,
 633                                                 NULL);
 634                         } else {
 635                                 /* File didn't exist and no O_CREAT. */
 636                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 637                         }
 638                         if (!NT_STATUS_IS_OK(status)) {
 639                                 DEBUG(10,("open_file: "
 640                                         "%s on file "
 641                                         "%s returned %s\n",
 642                                         file_existed ?
 643                                                 "smbd_check_open_rights" :
 644                                                 "check_parent_access",
 645                                         smb_fname_str_dbg(smb_fname),
 646                                         nt_errstr(status) ));
 647                                 return status;
 648                         }
 649                 }
 650
 651                 /* Actually do the open */
 652                 status = fd_open(conn, fsp, local_flags, unx_mode);
 653                 if (!NT_STATUS_IS_OK(status)) {
 654                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 655                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 656                                  nt_errstr(status),local_flags,flags));
 657                         return status;
 658                 }
 659
 660                 if ((local_flags & O_CREAT) && !file_existed) {
 661                         file_created = true;
 662                 }
 663
 664         } else {
 665                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 666                 if (!file_existed) {
 667                         /* File must exist for a stat open. */
 668                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 669                 }
 670
 671                 status = smbd_check_open_rights(conn,
 672                                 smb_fname,
 673                                 access_mask);
 674
 675                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 676                                 fsp->posix_open &&
 677                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 678                         /* This is a POSIX stat open for delete
 679                          * or rename on a symlink that points
 680                          * nowhere. Allow. */
 681                         DEBUG(10,("open_file: allowing POSIX "
 682                                   "open on bad symlink %s\n",
 683                                   smb_fname_str_dbg(smb_fname)));
 684                         status = NT_STATUS_OK;
 685                 }
 686
 687                 if (!NT_STATUS_IS_OK(status)) {
 688                         DEBUG(10,("open_file: "
 689                                 "smbd_check_open_rights on file "
 690                                 "%s returned %s\n",
 691                                 smb_fname_str_dbg(smb_fname),
 692                                 nt_errstr(status) ));
 693                         return status;
 694                 }
 695         }
 696
 697         if (!file_existed) {
 698                 int ret;
 699
 700                 if (fsp->fh->fd == -1) {
 701                         ret = SMB_VFS_STAT(conn, smb_fname);
 702                 } else {
 703                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 704                         /* If we have an fd, this stat should succeed. */
 705                         if (ret == -1) {
 706                                 DEBUG(0,("Error doing fstat on open file %s "
 707                                          "(%s)\n",
 708                                          smb_fname_str_dbg(smb_fname),
 709                                          strerror(errno) ));
 710                         }
 711                 }
 712
 713                 /* For a non-io open, this stat failing means file not found. JRA */
 714                 if (ret == -1) {
 715                         status = map_nt_error_from_unix(errno);
 716                         fd_close(fsp);
 717                         return status;
 718                 }
 719
 720                 if (file_created) {
 721                         bool need_re_stat = false;
 722                         /* Do all inheritance work after we've
 723                            done a successful stat call and filled
 724                            in the stat struct in fsp->fsp_name. */
 725
 726                         /* Inherit the ACL if required */
 727                         if (lp_inherit_perms(SNUM(conn))) {
 728                                 inherit_access_posix_acl(conn, parent_dir,
 729                                                          smb_fname->base_name,
 730                                                          unx_mode);
 731                                 need_re_stat = true;
 732                         }
 733
 734                         /* Change the owner if required. */
 735                         if (lp_inherit_owner(SNUM(conn))) {
 736                                 change_file_owner_to_parent(conn, parent_dir,
 737                                                             fsp);
 738                                 need_re_stat = true;
 739                         }
 740
 741                         if (need_re_stat) {
 742                                 if (fsp->fh->fd == -1) {
 743                                         ret = SMB_VFS_STAT(conn, smb_fname);
 744                                 } else {
 745                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 746                                         /* If we have an fd, this stat should succeed. */
 747                                         if (ret == -1) {
 748                                                 DEBUG(0,("Error doing fstat on open file %s "
 749                                                          "(%s)\n",
 750                                                          smb_fname_str_dbg(smb_fname),
 751                                                          strerror(errno) ));
 752                                         }
 753                                 }
 754                         }
 755
 756                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 757                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 758                                      smb_fname->base_name);
 759                 }
 760         }
 761
 762         /*
 763          * POSIX allows read-only opens of directories. We don't
 764          * want to do this (we use a different code path for this)
 765          * so catch a directory open and return an EISDIR. JRA.
 766          */
 767
 768         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 769                 fd_close(fsp);
 770                 errno = EISDIR;
 771                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 772         }
 773
 774         fsp->mode = smb_fname->st.st_ex_mode;
 775         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 776         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 777         fsp->file_pid = req ? req->smbpid : 0;
 778         fsp->can_lock = True;
 779         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 780         if (!CAN_WRITE(conn)) {
 781                 fsp->can_write = False;
 782         } else {
 783                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 784                         True : False;
 785         }
 786         fsp->print_file = NULL;
 787         fsp->modified = False;
 788         fsp->sent_oplock_break = NO_BREAK_SENT;
 789         fsp->is_directory = False;
 790         if (conn->aio_write_behind_list &&
 791             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 792                        conn->case_sensitive)) {
 793                 fsp->aio_write_behind = True;
 794         }
 795
 796         fsp->wcp = NULL; /* Write cache pointer. */
 797
 798         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 799                  conn->session_info->unix_info->unix_name,
 800                  smb_fname_str_dbg(smb_fname),
 801                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 802                  conn->num_files_open));
 803
 804         errno = 0;
 805         return NT_STATUS_OK;
 806 }
 807
 808 /****************************************************************************
 809  Check if we can open a file with a share mode.
 810  Returns True if conflict, False if not.
 811 ****************************************************************************/
 812
 813 static bool share_conflict(struct share_mode_entry *entry,
 814                            uint32 access_mask,
 815                            uint32 share_access)
 816 {
 817         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 818                   "entry->share_access = 0x%x, "
 819                   "entry->private_options = 0x%x\n",
 820                   (unsigned int)entry->access_mask,
 821                   (unsigned int)entry->share_access,
 822                   (unsigned int)entry->private_options));
 823
 824         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 825                   (unsigned int)access_mask, (unsigned int)share_access));
 826
 827         if ((entry->access_mask & (FILE_WRITE_DATA|
 828                                    FILE_APPEND_DATA|
 829                                    FILE_READ_DATA|
 830                                    FILE_EXECUTE|
 831                                    DELETE_ACCESS)) == 0) {
 832                 DEBUG(10,("share_conflict: No conflict due to "
 833                           "entry->access_mask = 0x%x\n",
 834                           (unsigned int)entry->access_mask ));
 835                 return False;
 836         }
 837
 838         if ((access_mask & (FILE_WRITE_DATA|
 839                             FILE_APPEND_DATA|
 840                             FILE_READ_DATA|
 841                             FILE_EXECUTE|
 842                             DELETE_ACCESS)) == 0) {
 843                 DEBUG(10,("share_conflict: No conflict due to "
 844                           "access_mask = 0x%x\n",
 845                           (unsigned int)access_mask ));
 846                 return False;
 847         }
 848
 849 #if 1 /* JRA TEST - Superdebug. */
 850 #define CHECK_MASK(num, am, right, sa, share) \
 851         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 852                 (unsigned int)(num), (unsigned int)(am), \
 853                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 854         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 855                 (unsigned int)(num), (unsigned int)(sa), \
 856                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 857         if (((am) & (right)) && !((sa) & (share))) { \
 858                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 859 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 860                         (unsigned int)(share) )); \
 861                 return True; \
 862         }
 863 #else
 864 #define CHECK_MASK(num, am, right, sa, share) \
 865         if (((am) & (right)) && !((sa) & (share))) { \
 866                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 867 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 868                         (unsigned int)(share) )); \
 869                 return True; \
 870         }
 871 #endif
 872
 873         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 874                    share_access, FILE_SHARE_WRITE);
 875         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 876                    entry->share_access, FILE_SHARE_WRITE);
 877
 878         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 879                    share_access, FILE_SHARE_READ);
 880         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 881                    entry->share_access, FILE_SHARE_READ);
 882
 883         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 884                    share_access, FILE_SHARE_DELETE);
 885         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 886                    entry->share_access, FILE_SHARE_DELETE);
 887
 888         DEBUG(10,("share_conflict: No conflict.\n"));
 889         return False;
 890 }
 891
 892 #if defined(DEVELOPER)
 893 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 894                                       int num,
 895                                       struct share_mode_entry *share_entry)
 896 {
 897         files_struct *fsp;
 898
 899         if (!procid_is_me(&share_entry->pid)) {
 900                 return;
 901         }
 902
 903         if (is_deferred_open_entry(share_entry) &&
 904             !open_was_deferred(sconn, share_entry->op_mid)) {
 905                 char *str = talloc_asprintf(talloc_tos(),
 906                         "Got a deferred entry without a request: "
 907                         "PANIC: %s\n",
 908                         share_mode_str(talloc_tos(), num, share_entry));
 909                 smb_panic(str);
 910         }
 911
 912         if (!is_valid_share_mode_entry(share_entry)) {
 913                 return;
 914         }
 915
 916         fsp = file_find_dif(sconn, share_entry->id,
 917                             share_entry->share_file_id);
 918         if (!fsp) {
 919                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 920                          share_mode_str(talloc_tos(), num, share_entry) ));
 921                 smb_panic("validate_my_share_entries: Cannot match a "
 922                           "share entry with an open file\n");
 923         }
 924
 925         if (is_deferred_open_entry(share_entry) ||
 926             is_unused_share_mode_entry(share_entry)) {
 927                 goto panic;
 928         }
 929
 930         if ((share_entry->op_type == NO_OPLOCK) &&
 931             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 932                 /* Someone has already written to it, but I haven't yet
 933                  * noticed */
 934                 return;
 935         }
 936
 937         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 938                 goto panic;
 939         }
 940
 941         return;
 942
 943  panic:
 944         {
 945                 char *str;
 946                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 947                          share_mode_str(talloc_tos(), num, share_entry) ));
 948                 str = talloc_asprintf(talloc_tos(),
 949                         "validate_my_share_entries: "
 950                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 951                          fsp->fsp_name->base_name,
 952                          (unsigned int)fsp->oplock_type,
 953                          (unsigned int)share_entry->op_type );
 954                 smb_panic(str);
 955         }
 956 }
 957 #endif
 958
 959 bool is_stat_open(uint32 access_mask)
 960 {
 961         return (access_mask &&
 962                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 963                                   FILE_WRITE_ATTRIBUTES))==0) &&
 964                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 965                                  FILE_WRITE_ATTRIBUTES)) != 0));
 966 }
 967
 968 /****************************************************************************
 969  Deal with share modes
 970  Invarient: Share mode must be locked on entry and exit.
 971  Returns -1 on error, or number of share modes on success (may be zero).
 972 ****************************************************************************/
 973
 974 static NTSTATUS open_mode_check(connection_struct *conn,
 975                                 struct share_mode_lock *lck,
 976                                 uint32_t name_hash,
 977                                 uint32 access_mask,
 978                                 uint32 share_access,
 979                                 uint32 create_options,
 980                                 bool *file_existed)
 981 {
 982         int i;
 983
 984         if(lck->num_share_modes == 0) {
 985                 return NT_STATUS_OK;
 986         }
 987
 988         *file_existed = True;
 989
 990         /* A delete on close prohibits everything */
 991
 992         if (is_delete_on_close_set(lck, name_hash)) {
 993                 return NT_STATUS_DELETE_PENDING;
 994         }
 995
 996         if (is_stat_open(access_mask)) {
 997                 /* Stat open that doesn't trigger oplock breaks or share mode
 998                  * checks... ! JRA. */
 999                 return NT_STATUS_OK;
1000         }
1001
1002         /*
1003          * Check if the share modes will give us access.
1004          */
1005
1006 #if defined(DEVELOPER)
1007         for(i = 0; i < lck->num_share_modes; i++) {
1008                 validate_my_share_entries(conn->sconn, i,
1009                                           &lck->share_modes[i]);
1010         }
1011 #endif
1012
1013         if (!lp_share_modes(SNUM(conn))) {
1014                 return NT_STATUS_OK;
1015         }
1016
1017         /* Now we check the share modes, after any oplock breaks. */
1018         for(i = 0; i < lck->num_share_modes; i++) {
1019
1020                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1021                         continue;
1022                 }
1023
1024                 /* someone else has a share lock on it, check to see if we can
1025                  * too */
1026                 if (share_conflict(&lck->share_modes[i],
1027                                    access_mask, share_access)) {
1028                         return NT_STATUS_SHARING_VIOLATION;
1029                 }
1030         }
1031
1032         return NT_STATUS_OK;
1033 }
1034
1035 static bool is_delete_request(files_struct *fsp) {
1036         return ((fsp->access_mask == DELETE_ACCESS) &&
1037                 (fsp->oplock_type == NO_OPLOCK));
1038 }
1039
1040 /*
1041  * Send a break message to the oplock holder and delay the open for
1042  * our client.
1043  */
1044
1045 static NTSTATUS send_break_message(files_struct *fsp,
1046                                         struct share_mode_entry *exclusive,
1047                                         uint64_t mid,
1048                                         int oplock_request)
1049 {
1050         NTSTATUS status;
1051         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1052
1053         DEBUG(10, ("Sending break request to PID %s\n",
1054                    procid_str_static(&exclusive->pid)));
1055         exclusive->op_mid = mid;
1056
1057         /* Create the message. */
1058         share_mode_entry_to_message(msg, exclusive);
1059
1060         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1061            don't want this set in the share mode struct pointed to by lck. */
1062
1063         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1064                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1065                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1066         }
1067
1068         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1069                                     MSG_SMB_BREAK_REQUEST,
1070                                     (uint8 *)msg,
1071                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1072         if (!NT_STATUS_IS_OK(status)) {
1073                 DEBUG(3, ("Could not send oplock break message: %s\n",
1074                           nt_errstr(status)));
1075         }
1076
1077         return status;
1078 }
1079
1080 /*
1081  * Return share_mode_entry pointers for :
1082  * 1). Batch oplock entry.
1083  * 2). Batch or exclusive oplock entry (may be identical to #1).
1084  * bool have_level2_oplock
1085  * bool have_no_oplock.
1086  * Do internal consistency checks on the share mode for a file.
1087  */
1088
1089 static void find_oplock_types(files_struct *fsp,
1090                                 int oplock_request,
1091                                 struct share_mode_lock *lck,
1092                                 struct share_mode_entry **pp_batch,
1093                                 struct share_mode_entry **pp_ex_or_batch,
1094                                 bool *got_level2,
1095                                 bool *got_no_oplock)
1096 {
1097         int i;
1098
1099         *pp_batch = NULL;
1100         *pp_ex_or_batch = NULL;
1101         *got_level2 = false;
1102         *got_no_oplock = false;
1103
1104         /* Ignore stat or internal opens, as is done in
1105                 delay_for_batch_oplocks() and
1106                 delay_for_exclusive_oplocks().
1107          */
1108         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1109                 return;
1110         }
1111
1112         for (i=0; i<lck->num_share_modes; i++) {
1113                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1114                         continue;
1115                 }
1116
1117                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1118                                 is_stat_open(lck->share_modes[i].access_mask)) {
1119                         /* We ignore stat opens in the table - they
1120                            always have NO_OPLOCK and never get or
1121                            cause breaks. JRA. */
1122                         continue;
1123                 }
1124
1125                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1126                         /* batch - can only be one. */
1127                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1128                                 smb_panic("Bad batch oplock entry.");
1129                         }
1130                         *pp_batch = &lck->share_modes[i];
1131                 }
1132
1133                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1134                         /* Exclusive or batch - can only be one. */
1135                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1136                                 smb_panic("Bad exclusive or batch oplock entry.");
1137                         }
1138                         *pp_ex_or_batch = &lck->share_modes[i];
1139                 }
1140
1141                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1142                         if (*pp_batch || *pp_ex_or_batch) {
1143                                 smb_panic("Bad levelII oplock entry.");
1144                         }
1145                         *got_level2 = true;
1146                 }
1147
1148                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1149                         if (*pp_batch || *pp_ex_or_batch) {
1150                                 smb_panic("Bad no oplock entry.");
1151                         }
1152                         *got_no_oplock = true;
1153                 }
1154         }
1155 }
1156
1157 static bool delay_for_batch_oplocks(files_struct *fsp,
1158                                         uint64_t mid,
1159                                         int oplock_request,
1160                                         struct share_mode_entry *batch_entry)
1161 {
1162         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1163                 return false;
1164         }
1165
1166         if (batch_entry != NULL) {
1167                 /* Found a batch oplock */
1168                 send_break_message(fsp, batch_entry, mid, oplock_request);
1169                 return true;
1170         }
1171         return false;
1172 }
1173
1174 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1175                                         uint64_t mid,
1176                                         int oplock_request,
1177                                         struct share_mode_entry *ex_entry)
1178 {
1179         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1180                 return false;
1181         }
1182
1183         if (ex_entry != NULL) {
1184                 /* Found an exclusive or batch oplock */
1185                 bool delay_it = is_delete_request(fsp) ?
1186                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1187                 if (delay_it) {
1188                         send_break_message(fsp, ex_entry, mid, oplock_request);
1189                         return true;
1190                 }
1191         }
1192         return false;
1193 }
1194
1195 static void grant_fsp_oplock_type(files_struct *fsp,
1196                                 const struct byte_range_lock *br_lck,
1197                                 int oplock_request,
1198                                 bool got_level2_oplock,
1199                                 bool got_a_none_oplock)
1200 {
1201         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1202                             lp_level2_oplocks(SNUM(fsp->conn));
1203
1204         /* Start by granting what the client asked for,
1205            but ensure no SAMBA_PRIVATE bits can be set. */
1206         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1207
1208         if (oplock_request & INTERNAL_OPEN_ONLY) {
1209                 /* No oplocks on internal open. */
1210                 fsp->oplock_type = NO_OPLOCK;
1211                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1212                         fsp->oplock_type, fsp_str_dbg(fsp)));
1213                 return;
1214         } else if (br_lck && br_lck->num_locks > 0) {
1215                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1216                         fsp_str_dbg(fsp)));
1217                 fsp->oplock_type = NO_OPLOCK;
1218         }
1219
1220         if (is_stat_open(fsp->access_mask)) {
1221                 /* Leave the value already set. */
1222                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1223                         fsp->oplock_type, fsp_str_dbg(fsp)));
1224                 return;
1225         }
1226
1227         /*
1228          * Match what was requested (fsp->oplock_type) with
1229          * what was found in the existing share modes.
1230          */
1231
1232         if (got_a_none_oplock) {
1233                 fsp->oplock_type = NO_OPLOCK;
1234         } else if (got_level2_oplock) {
1235                 if (fsp->oplock_type == NO_OPLOCK ||
1236                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1237                         /* Store a level2 oplock, but don't tell the client */
1238                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1239                 } else {
1240                         fsp->oplock_type = LEVEL_II_OPLOCK;
1241                 }
1242         } else {
1243                 /* All share_mode_entries are placeholders or deferred.
1244                  * Silently upgrade to fake levelII if the client didn't
1245                  * ask for an oplock. */
1246                 if (fsp->oplock_type == NO_OPLOCK) {
1247                         /* Store a level2 oplock, but don't tell the client */
1248                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1249                 }
1250         }
1251
1252         /*
1253          * Don't grant level2 to clients that don't want them
1254          * or if we've turned them off.
1255          */
1256         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1257                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1258         }
1259
1260         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1261                   fsp->oplock_type, fsp_str_dbg(fsp)));
1262 }
1263
1264 bool request_timed_out(struct timeval request_time,
1265                        struct timeval timeout)
1266 {
1267         struct timeval now, end_time;
1268         GetTimeOfDay(&now);
1269         end_time = timeval_sum(&request_time, &timeout);
1270         return (timeval_compare(&end_time, &now) < 0);
1271 }
1272
1273 /****************************************************************************
1274  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1275 ****************************************************************************/
1276
1277 static void defer_open(struct share_mode_lock *lck,
1278                        struct timeval request_time,
1279                        struct timeval timeout,
1280                        struct smb_request *req,
1281                        struct deferred_open_record *state)
1282 {
1283         int i;
1284
1285         /* Paranoia check */
1286
1287         for (i=0; i<lck->num_share_modes; i++) {
1288                 struct share_mode_entry *e = &lck->share_modes[i];
1289
1290                 if (!is_deferred_open_entry(e)) {
1291                         continue;
1292                 }
1293
1294                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1295                         DEBUG(0, ("Trying to defer an already deferred "
1296                                 "request: mid=%llu, exiting\n",
1297                                 (unsigned long long)req->mid));
1298                         exit_server("attempt to defer a deferred request");
1299                 }
1300         }
1301
1302         /* End paranoia check */
1303
1304         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1305                   "open entry for mid %llu\n",
1306                   (unsigned int)request_time.tv_sec,
1307                   (unsigned int)request_time.tv_usec,
1308                   (unsigned long long)req->mid));
1309
1310         if (!push_deferred_open_message_smb(req, request_time, timeout,
1311                                        state->id, (char *)state, sizeof(*state))) {
1312                 exit_server("push_deferred_open_message_smb failed");
1313         }
1314         add_deferred_open(lck, req->mid, request_time,
1315                           sconn_server_id(req->sconn), state->id);
1316 }
1317
1318
1319 /****************************************************************************
1320  On overwrite open ensure that the attributes match.
1321 ****************************************************************************/
1322
1323 bool open_match_attributes(connection_struct *conn,
1324                            uint32 old_dos_attr,
1325                            uint32 new_dos_attr,
1326                            mode_t existing_unx_mode,
1327                            mode_t new_unx_mode,
1328                            mode_t *returned_unx_mode)
1329 {
1330         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1331
1332         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1333         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1334
1335         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1336            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1337                 *returned_unx_mode = new_unx_mode;
1338         } else {
1339                 *returned_unx_mode = (mode_t)0;
1340         }
1341
1342         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1343                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1344                   "returned_unx_mode = 0%o\n",
1345                   (unsigned int)old_dos_attr,
1346                   (unsigned int)existing_unx_mode,
1347                   (unsigned int)new_dos_attr,
1348                   (unsigned int)*returned_unx_mode ));
1349
1350         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1351         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1352                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1353                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1354                         return False;
1355                 }
1356         }
1357         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1358                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1359                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1360                         return False;
1361                 }
1362         }
1363         return True;
1364 }
1365
1366 /****************************************************************************
1367  Special FCB or DOS processing in the case of a sharing violation.
1368  Try and find a duplicated file handle.
1369 ****************************************************************************/
1370
1371 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1372                                      connection_struct *conn,
1373                                      files_struct *fsp_to_dup_into,
1374                                      const struct smb_filename *smb_fname,
1375                                      struct file_id id,
1376                                      uint16 file_pid,
1377                                      uint16 vuid,
1378                                      uint32 access_mask,
1379                                      uint32 share_access,
1380                                      uint32 create_options)
1381 {
1382         files_struct *fsp;
1383
1384         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1385                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1386
1387         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1388             fsp = file_find_di_next(fsp)) {
1389
1390                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1391                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1392                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1393                           fsp->fh->fd, (unsigned int)fsp->vuid,
1394                           (unsigned int)fsp->file_pid,
1395                           (unsigned int)fsp->fh->private_options,
1396                           (unsigned int)fsp->access_mask ));
1397
1398                 if (fsp->fh->fd != -1 &&
1399                     fsp->vuid == vuid &&
1400                     fsp->file_pid == file_pid &&
1401                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1402                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1403                     (fsp->access_mask & FILE_WRITE_DATA) &&
1404                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1405                     strequal(fsp->fsp_name->stream_name,
1406                              smb_fname->stream_name)) {
1407                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1408                         break;
1409                 }
1410         }
1411
1412         if (!fsp) {
1413                 return NT_STATUS_NOT_FOUND;
1414         }
1415
1416         /* quite an insane set of semantics ... */
1417         if (is_executable(smb_fname->base_name) &&
1418             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1419                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1420                 return NT_STATUS_INVALID_PARAMETER;
1421         }
1422
1423         /* We need to duplicate this fsp. */
1424         return dup_file_fsp(req, fsp, access_mask, share_access,
1425                             create_options, fsp_to_dup_into);
1426 }
1427
1428 static void schedule_defer_open(struct share_mode_lock *lck,
1429                                 struct timeval request_time,
1430                                 struct smb_request *req)
1431 {
1432         struct deferred_open_record state;
1433
1434         /* This is a relative time, added to the absolute
1435            request_time value to get the absolute timeout time.
1436            Note that if this is the second or greater time we enter
1437            this codepath for this particular request mid then
1438            request_time is left as the absolute time of the *first*
1439            time this request mid was processed. This is what allows
1440            the request to eventually time out. */
1441
1442         struct timeval timeout;
1443
1444         /* Normally the smbd we asked should respond within
1445          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1446          * the client did, give twice the timeout as a safety
1447          * measure here in case the other smbd is stuck
1448          * somewhere else. */
1449
1450         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1451
1452         /* Nothing actually uses state.delayed_for_oplocks
1453            but it's handy to differentiate in debug messages
1454            between a 30 second delay due to oplock break, and
1455            a 1 second delay for share mode conflicts. */
1456
1457         state.delayed_for_oplocks = True;
1458         state.id = lck->id;
1459
1460         if (!request_timed_out(request_time, timeout)) {
1461                 defer_open(lck, request_time, timeout, req, &state);
1462         }
1463 }
1464
1465 /****************************************************************************
1466  Work out what access_mask to use from what the client sent us.
1467 ****************************************************************************/
1468
1469 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1470                                     const struct smb_filename *smb_fname,
1471                                     bool file_existed,
1472                                     uint32_t access_mask,
1473                                     uint32_t *access_mask_out)
1474 {
1475         NTSTATUS status;
1476         uint32_t orig_access_mask = access_mask;
1477         uint32_t rejected_share_access;
1478
1479         /*
1480          * Convert GENERIC bits to specific bits.
1481          */
1482
1483         se_map_generic(&access_mask, &file_generic_mapping);
1484
1485         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1486         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1487                 if (get_current_uid(conn) == (uid_t)0) {
1488                         access_mask  |= FILE_GENERIC_ALL;
1489                 } else if (file_existed) {
1490
1491                         struct security_descriptor *sd;
1492                         uint32_t access_granted = 0;
1493
1494                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1495                                         (SECINFO_OWNER |
1496                                         SECINFO_GROUP |
1497                                         SECINFO_DACL),&sd);
1498
1499                         if (!NT_STATUS_IS_OK(status)) {
1500                                 DEBUG(10,("smbd_calculate_access_mask: "
1501                                         "Could not get acl on file %s: %s\n",
1502                                         smb_fname_str_dbg(smb_fname),
1503                                         nt_errstr(status)));
1504                                 return NT_STATUS_ACCESS_DENIED;
1505                         }
1506
1507                         status = smb1_file_se_access_check(conn,
1508                                         sd,
1509                                         get_current_nttok(conn),
1510                                         access_mask,
1511                                         &access_granted);
1512
1513                         TALLOC_FREE(sd);
1514
1515                         if (!NT_STATUS_IS_OK(status)) {
1516                                 DEBUG(10, ("smbd_calculate_access_mask: "
1517                                         "Access denied on file %s: "
1518                                         "when calculating maximum access\n",
1519                                         smb_fname_str_dbg(smb_fname)));
1520                                 return NT_STATUS_ACCESS_DENIED;
1521                         }
1522
1523                         access_mask = access_granted;
1524                 } else {
1525                         access_mask = FILE_GENERIC_ALL;
1526                 }
1527
1528                 access_mask &= conn->share_access;
1529         }
1530
1531         rejected_share_access = access_mask & ~(conn->share_access);
1532
1533         if (rejected_share_access) {
1534                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1535                         "file %s: rejected by share access mask[0x%08X] "
1536                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1537                         smb_fname_str_dbg(smb_fname),
1538                         conn->share_access,
1539                         orig_access_mask, access_mask,
1540                         rejected_share_access));
1541                 return NT_STATUS_ACCESS_DENIED;
1542         }
1543
1544         *access_mask_out = access_mask;
1545         return NT_STATUS_OK;
1546 }
1547
1548 /****************************************************************************
1549  Remove the deferred open entry under lock.
1550 ****************************************************************************/
1551
1552 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1553                                 struct server_id pid)
1554 {
1555         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1556                         NULL, NULL, NULL);
1557         if (lck == NULL) {
1558                 DEBUG(0, ("could not get share mode lock\n"));
1559         } else {
1560                 del_deferred_open_entry(lck, mid, pid);
1561                 TALLOC_FREE(lck);
1562         }
1563 }
1564
1565 /****************************************************************
1566  Ensure we get the brlock lock followed by the share mode lock
1567  in the correct order to prevent deadlocks if other smbd's are
1568  using the brlock database on this file simultaneously with this open
1569  (that code also gets the locks in brlock -> share mode lock order).
1570 ****************************************************************/
1571
1572 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1573                                 files_struct *fsp,
1574                                 const struct file_id id,
1575                                 const char *connectpath,
1576                                 const struct smb_filename *smb_fname,
1577                                 const struct timespec *p_old_write_time,
1578                                 struct share_mode_lock **p_lck,
1579                                 struct byte_range_lock **p_br_lck)
1580 {
1581         /* Ordering - we must get the br_lck for this
1582            file before the share mode. */
1583         if (lp_locking(fsp->conn->params)) {
1584                 *p_br_lck = brl_get_locks_readonly(fsp);
1585                 if (*p_br_lck == NULL) {
1586                         DEBUG(0, ("Could not get br_lock\n"));
1587                         return false;
1588                 }
1589                 /* Note - we don't need to free the returned
1590                    br_lck explicitly as it was allocated on talloc_tos()
1591                    and so will be autofreed (and release the lock)
1592                    once the frame context disappears.
1593
1594                    If it was set to fsp->brlock_rec then it was
1595                    talloc_move'd to hang off the fsp pointer and
1596                    in this case is guarenteed to not be holding the
1597                    lock on the brlock database. */
1598         }
1599
1600         *p_lck = get_share_mode_lock(mem_ctx,
1601                                 id,
1602                                 connectpath,
1603                                 smb_fname,
1604                                 p_old_write_time);
1605
1606         if (*p_lck == NULL) {
1607                 DEBUG(0, ("Could not get share mode lock\n"));
1608                 TALLOC_FREE(*p_br_lck);
1609                 return false;
1610         }
1611         return true;
1612 }
1613
1614 /****************************************************************************
1615  Open a file with a share mode. Passed in an already created files_struct *.
1616 ****************************************************************************/
1617
1618 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1619                             struct smb_request *req,
1620                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1621                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1622                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1623                             uint32 create_options,      /* options such as delete on close. */
1624                             uint32 new_dos_attributes,  /* attributes used for new file. */
1625                             int oplock_request,         /* internal Samba oplock codes. */
1626                                                         /* Information (FILE_EXISTS etc.) */
1627                             uint32_t private_flags,     /* Samba specific flags. */
1628                             int *pinfo,
1629                             files_struct *fsp)
1630 {
1631         struct smb_filename *smb_fname = fsp->fsp_name;
1632         int flags=0;
1633         int flags2=0;
1634         bool file_existed = VALID_STAT(smb_fname->st);
1635         bool def_acl = False;
1636         bool posix_open = False;
1637         bool new_file_created = False;
1638         bool clear_ads = false;
1639         struct file_id id;
1640         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1641         mode_t new_unx_mode = (mode_t)0;
1642         mode_t unx_mode = (mode_t)0;
1643         int info;
1644         uint32 existing_dos_attributes = 0;
1645         struct timeval request_time = timeval_zero();
1646         struct share_mode_lock *lck = NULL;
1647         uint32 open_access_mask = access_mask;
1648         NTSTATUS status;
1649         char *parent_dir;
1650
1651         ZERO_STRUCT(id);
1652
1653         if (conn->printer) {
1654                 /*
1655                  * Printers are handled completely differently.
1656                  * Most of the passed parameters are ignored.
1657                  */
1658
1659                 if (pinfo) {
1660                         *pinfo = FILE_WAS_CREATED;
1661                 }
1662
1663                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1664                            smb_fname_str_dbg(smb_fname)));
1665
1666                 if (!req) {
1667                         DEBUG(0,("open_file_ntcreate: printer open without "
1668                                 "an SMB request!\n"));
1669                         return NT_STATUS_INTERNAL_ERROR;
1670                 }
1671
1672                 return print_spool_open(fsp, smb_fname->base_name,
1673                                         req->vuid);
1674         }
1675
1676         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1677                             NULL)) {
1678                 return NT_STATUS_NO_MEMORY;
1679         }
1680
1681         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1682                 posix_open = True;
1683                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1684                 new_dos_attributes = 0;
1685         } else {
1686                 /* Windows allows a new file to be created and
1687                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1688                    sent by the client. Do the same. */
1689
1690                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1691
1692                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1693                  * created new. */
1694                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1695                                      smb_fname, parent_dir);
1696         }
1697
1698         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1699                    "access_mask=0x%x share_access=0x%x "
1700                    "create_disposition = 0x%x create_options=0x%x "
1701                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1702                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1703                    access_mask, share_access, create_disposition,
1704                    create_options, (unsigned int)unx_mode, oplock_request,
1705                    (unsigned int)private_flags));
1706
1707         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1708                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1709                 return NT_STATUS_INTERNAL_ERROR;
1710         }
1711
1712         /*
1713          * Only non-internal opens can be deferred at all
1714          */
1715
1716         if (req) {
1717                 void *ptr;
1718                 if (get_deferred_open_message_state(req,
1719                                 &request_time,
1720                                 &ptr)) {
1721
1722                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1723                         /* Remember the absolute time of the original
1724                            request with this mid. We'll use it later to
1725                            see if this has timed out. */
1726
1727                         /* Remove the deferred open entry under lock. */
1728                         remove_deferred_open_entry(
1729                                 state->id, req->mid,
1730                                 sconn_server_id(req->sconn));
1731
1732                         /* Ensure we don't reprocess this message. */
1733                         remove_deferred_open_message_smb(req->sconn, req->mid);
1734                 }
1735         }
1736
1737         status = check_name(conn, smb_fname->base_name);
1738         if (!NT_STATUS_IS_OK(status)) {
1739                 return status;
1740         }
1741
1742         if (!posix_open) {
1743                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1744                 if (file_existed) {
1745                         existing_dos_attributes = dos_mode(conn, smb_fname);
1746                 }
1747         }
1748
1749         /* ignore any oplock requests if oplocks are disabled */
1750         if (!lp_oplocks(SNUM(conn)) ||
1751             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1752                 /* Mask off everything except the private Samba bits. */
1753                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1754         }
1755
1756         /* this is for OS/2 long file names - say we don't support them */
1757         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1758                 /* OS/2 Workplace shell fix may be main code stream in a later
1759                  * release. */
1760                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1761                          "supported.\n"));
1762                 if (use_nt_status()) {
1763                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1764                 }
1765                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1766         }
1767
1768         switch( create_disposition ) {
1769                 /*
1770                  * Currently we're using FILE_SUPERSEDE as the same as
1771                  * FILE_OVERWRITE_IF but they really are
1772                  * different. FILE_SUPERSEDE deletes an existing file
1773                  * (requiring delete access) then recreates it.
1774                  */
1775                 case FILE_SUPERSEDE:
1776                         /* If file exists replace/overwrite. If file doesn't
1777                          * exist create. */
1778                         flags2 |= (O_CREAT | O_TRUNC);
1779                         clear_ads = true;
1780                         break;
1781
1782                 case FILE_OVERWRITE_IF:
1783                         /* If file exists replace/overwrite. If file doesn't
1784                          * exist create. */
1785                         flags2 |= (O_CREAT | O_TRUNC);
1786                         clear_ads = true;
1787                         break;
1788
1789                 case FILE_OPEN:
1790                         /* If file exists open. If file doesn't exist error. */
1791                         if (!file_existed) {
1792                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1793                                          "requested for file %s and file "
1794                                          "doesn't exist.\n",
1795                                          smb_fname_str_dbg(smb_fname)));
1796                                 errno = ENOENT;
1797                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1798                         }
1799                         break;
1800
1801                 case FILE_OVERWRITE:
1802                         /* If file exists overwrite. If file doesn't exist
1803                          * error. */
1804                         if (!file_existed) {
1805                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1806                                          "requested for file %s and file "
1807                                          "doesn't exist.\n",
1808                                          smb_fname_str_dbg(smb_fname) ));
1809                                 errno = ENOENT;
1810                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1811                         }
1812                         flags2 |= O_TRUNC;
1813                         clear_ads = true;
1814                         break;
1815
1816                 case FILE_CREATE:
1817                         /* If file exists error. If file doesn't exist
1818                          * create. */
1819                         if (file_existed) {
1820                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1821                                          "requested for file %s and file "
1822                                          "already exists.\n",
1823                                          smb_fname_str_dbg(smb_fname)));
1824                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1825                                         errno = EISDIR;
1826                                 } else {
1827                                         errno = EEXIST;
1828                                 }
1829                                 return map_nt_error_from_unix(errno);
1830                         }
1831                         flags2 |= (O_CREAT|O_EXCL);
1832                         break;
1833
1834                 case FILE_OPEN_IF:
1835                         /* If file exists open. If file doesn't exist
1836                          * create. */
1837                         flags2 |= O_CREAT;
1838                         break;
1839
1840                 default:
1841                         return NT_STATUS_INVALID_PARAMETER;
1842         }
1843
1844         /* We only care about matching attributes on file exists and
1845          * overwrite. */
1846
1847         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1848                              (create_disposition == FILE_OVERWRITE_IF))) {
1849                 if (!open_match_attributes(conn, existing_dos_attributes,
1850                                            new_dos_attributes,
1851                                            smb_fname->st.st_ex_mode,
1852                                            unx_mode, &new_unx_mode)) {
1853                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1854                                  "for file %s (%x %x) (0%o, 0%o)\n",
1855                                  smb_fname_str_dbg(smb_fname),
1856                                  existing_dos_attributes,
1857                                  new_dos_attributes,
1858                                  (unsigned int)smb_fname->st.st_ex_mode,
1859                                  (unsigned int)unx_mode ));
1860                         errno = EACCES;
1861                         return NT_STATUS_ACCESS_DENIED;
1862                 }
1863         }
1864
1865         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1866                                         access_mask,
1867                                         &access_mask);
1868         if (!NT_STATUS_IS_OK(status)) {
1869                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1870                         "on file %s returned %s\n",
1871                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1872                 return status;
1873         }
1874
1875         open_access_mask = access_mask;
1876
1877         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1878                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1879         }
1880
1881         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1882                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1883                     access_mask));
1884
1885         /*
1886          * Note that we ignore the append flag as append does not
1887          * mean the same thing under DOS and Unix.
1888          */
1889
1890         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1891                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1892                 /* DENY_DOS opens are always underlying read-write on the
1893                    file handle, no matter what the requested access mask
1894                     says. */
1895                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1896                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1897                         flags = O_RDWR;
1898                 } else {
1899                         flags = O_WRONLY;
1900                 }
1901         } else {
1902                 flags = O_RDONLY;
1903         }
1904
1905         /*
1906          * Currently we only look at FILE_WRITE_THROUGH for create options.
1907          */
1908
1909 #if defined(O_SYNC)
1910         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1911                 flags2 |= O_SYNC;
1912         }
1913 #endif /* O_SYNC */
1914
1915         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1916                 flags2 |= O_APPEND;
1917         }
1918
1919         if (!posix_open && !CAN_WRITE(conn)) {
1920                 /*
1921                  * We should really return a permission denied error if either
1922                  * O_CREAT or O_TRUNC are set, but for compatibility with
1923                  * older versions of Samba we just AND them out.
1924                  */
1925                 flags2 &= ~(O_CREAT|O_TRUNC);
1926         }
1927
1928         /*
1929          * Ensure we can't write on a read-only share or file.
1930          */
1931
1932         if (flags != O_RDONLY && file_existed &&
1933             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1934                 DEBUG(5,("open_file_ntcreate: write access requested for "
1935                          "file %s on read only %s\n",
1936                          smb_fname_str_dbg(smb_fname),
1937                          !CAN_WRITE(conn) ? "share" : "file" ));
1938                 errno = EACCES;
1939                 return NT_STATUS_ACCESS_DENIED;
1940         }
1941
1942         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1943         fsp->share_access = share_access;
1944         fsp->fh->private_options = private_flags;
1945         fsp->access_mask = open_access_mask; /* We change this to the
1946                                               * requested access_mask after
1947                                               * the open is done. */
1948         fsp->posix_open = posix_open;
1949
1950         /* Ensure no SAMBA_PRIVATE bits can be set. */
1951         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1952
1953         if (timeval_is_zero(&request_time)) {
1954                 request_time = fsp->open_time;
1955         }
1956
1957         if (file_existed) {
1958                 struct byte_range_lock *br_lck = NULL;
1959                 struct share_mode_entry *batch_entry = NULL;
1960                 struct share_mode_entry *exclusive_entry = NULL;
1961                 bool got_level2_oplock = false;
1962                 bool got_a_none_oplock = false;
1963
1964                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1965                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1966
1967                 if (!acquire_ordered_locks(talloc_tos(),
1968                                         fsp,
1969                                         id,
1970                                         conn->connectpath,
1971                                         smb_fname,
1972                                         &old_write_time,
1973                                         &lck,
1974                                         &br_lck)) {
1975                         return NT_STATUS_SHARING_VIOLATION;
1976                 }
1977
1978                 /* Get the types we need to examine. */
1979                 find_oplock_types(fsp,
1980                                 oplock_request,
1981                                 lck,
1982                                 &batch_entry,
1983                                 &exclusive_entry,
1984                                 &got_level2_oplock,
1985                                 &got_a_none_oplock);
1986
1987                 /* First pass - send break only on batch oplocks. */
1988                 if ((req != NULL) &&
1989                                 delay_for_batch_oplocks(fsp,
1990                                         req->mid,
1991                                         oplock_request,
1992                                         batch_entry)) {
1993                         schedule_defer_open(lck, request_time, req);
1994                         TALLOC_FREE(lck);
1995                         return NT_STATUS_SHARING_VIOLATION;
1996                 }
1997
1998                 /* Use the client requested access mask here, not the one we
1999                  * open with. */
2000                 status = open_mode_check(conn, lck, fsp->name_hash,
2001                                         access_mask, share_access,
2002                                          create_options, &file_existed);
2003
2004                 if (NT_STATUS_IS_OK(status)) {
2005                         /* We might be going to allow this open. Check oplock
2006                          * status again. */
2007                         /* Second pass - send break for both batch or
2008                          * exclusive oplocks. */
2009                         if ((req != NULL) &&
2010                                         delay_for_exclusive_oplocks(
2011                                                 fsp,
2012                                                 req->mid,
2013                                                 oplock_request,
2014                                                 exclusive_entry)) {
2015                                 schedule_defer_open(lck, request_time, req);
2016                                 TALLOC_FREE(lck);
2017                                 return NT_STATUS_SHARING_VIOLATION;
2018                         }
2019                 }
2020
2021                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2022                         /* DELETE_PENDING is not deferred for a second */
2023                         TALLOC_FREE(lck);
2024                         return status;
2025                 }
2026
2027                 grant_fsp_oplock_type(fsp,
2028                                 br_lck,
2029                                 oplock_request,
2030                                 got_level2_oplock,
2031                                 got_a_none_oplock);
2032
2033                 if (!NT_STATUS_IS_OK(status)) {
2034                         uint32 can_access_mask;
2035                         bool can_access = True;
2036
2037                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2038
2039                         /* Check if this can be done with the deny_dos and fcb
2040                          * calls. */
2041                         if (private_flags &
2042                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2043                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2044                                 if (req == NULL) {
2045                                         DEBUG(0, ("DOS open without an SMB "
2046                                                   "request!\n"));
2047                                         TALLOC_FREE(lck);
2048                                         return NT_STATUS_INTERNAL_ERROR;
2049                                 }
2050
2051                                 /* Use the client requested access mask here,
2052                                  * not the one we open with. */
2053                                 status = fcb_or_dos_open(req,
2054                                                         conn,
2055                                                         fsp,
2056                                                         smb_fname,
2057                                                         id,
2058                                                         req->smbpid,
2059                                                         req->vuid,
2060                                                         access_mask,
2061                                                         share_access,
2062                                                         create_options);
2063
2064                                 if (NT_STATUS_IS_OK(status)) {
2065                                         TALLOC_FREE(lck);
2066                                         if (pinfo) {
2067                                                 *pinfo = FILE_WAS_OPENED;
2068                                         }
2069                                         return NT_STATUS_OK;
2070                                 }
2071                         }
2072
2073                         /*
2074                          * This next line is a subtlety we need for
2075                          * MS-Access. If a file open will fail due to share
2076                          * permissions and also for security (access) reasons,
2077                          * we need to return the access failed error, not the
2078                          * share error. We can't open the file due to kernel
2079                          * oplock deadlock (it's possible we failed above on
2080                          * the open_mode_check()) so use a userspace check.
2081                          */
2082
2083                         if (flags & O_RDWR) {
2084                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2085                         } else if (flags & O_WRONLY) {
2086                                 can_access_mask = FILE_WRITE_DATA;
2087                         } else {
2088                                 can_access_mask = FILE_READ_DATA;
2089                         }
2090
2091                         if (((can_access_mask & FILE_WRITE_DATA) &&
2092                                 !CAN_WRITE(conn)) ||
2093                             !can_access_file_data(conn, smb_fname,
2094                                                   can_access_mask)) {
2095                                 can_access = False;
2096                         }
2097
2098                         /*
2099                          * If we're returning a share violation, ensure we
2100                          * cope with the braindead 1 second delay.
2101                          */
2102
2103                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2104                             lp_defer_sharing_violations()) {
2105                                 struct timeval timeout;
2106                                 struct deferred_open_record state;
2107                                 int timeout_usecs;
2108
2109                                 /* this is a hack to speed up torture tests
2110                                    in 'make test' */
2111                                 timeout_usecs = lp_parm_int(SNUM(conn),
2112                                                             "smbd","sharedelay",
2113                                                             SHARING_VIOLATION_USEC_WAIT);
2114
2115                                 /* This is a relative time, added to the absolute
2116                                    request_time value to get the absolute timeout time.
2117                                    Note that if this is the second or greater time we enter
2118                                    this codepath for this particular request mid then
2119                                    request_time is left as the absolute time of the *first*
2120                                    time this request mid was processed. This is what allows
2121                                    the request to eventually time out. */
2122
2123                                 timeout = timeval_set(0, timeout_usecs);
2124
2125                                 /* Nothing actually uses state.delayed_for_oplocks
2126                                    but it's handy to differentiate in debug messages
2127                                    between a 30 second delay due to oplock break, and
2128                                    a 1 second delay for share mode conflicts. */
2129
2130                                 state.delayed_for_oplocks = False;
2131                                 state.id = id;
2132
2133                                 if ((req != NULL)
2134                                     && !request_timed_out(request_time,
2135                                                           timeout)) {
2136                                         defer_open(lck, request_time, timeout,
2137                                                    req, &state);
2138                                 }
2139                         }
2140
2141                         TALLOC_FREE(lck);
2142                         if (can_access) {
2143                                 /*
2144                                  * We have detected a sharing violation here
2145                                  * so return the correct error code
2146                                  */
2147                                 status = NT_STATUS_SHARING_VIOLATION;
2148                         } else {
2149                                 status = NT_STATUS_ACCESS_DENIED;
2150                         }
2151                         return status;
2152                 }
2153
2154                 /*
2155                  * We exit this block with the share entry *locked*.....
2156                  */
2157         }
2158
2159         SMB_ASSERT(!file_existed || (lck != NULL));
2160
2161         /*
2162          * Ensure we pay attention to default ACLs on directories if required.
2163          */
2164
2165         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2166             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2167                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2168         }
2169
2170         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2171                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2172                  (unsigned int)flags, (unsigned int)flags2,
2173                  (unsigned int)unx_mode, (unsigned int)access_mask,
2174                  (unsigned int)open_access_mask));
2175
2176         /*
2177          * open_file strips any O_TRUNC flags itself.
2178          */
2179
2180         fsp_open = open_file(fsp, conn, req, parent_dir,
2181                              flags|flags2, unx_mode, access_mask,
2182                              open_access_mask);
2183
2184         if (!NT_STATUS_IS_OK(fsp_open)) {
2185                 TALLOC_FREE(lck);
2186                 return fsp_open;
2187         }
2188
2189         if (!file_existed) {
2190                 struct byte_range_lock *br_lck = NULL;
2191                 struct share_mode_entry *batch_entry = NULL;
2192                 struct share_mode_entry *exclusive_entry = NULL;
2193                 bool got_level2_oplock = false;
2194                 bool got_a_none_oplock = false;
2195                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2196                 /*
2197                  * Deal with the race condition where two smbd's detect the
2198                  * file doesn't exist and do the create at the same time. One
2199                  * of them will win and set a share mode, the other (ie. this
2200                  * one) should check if the requested share mode for this
2201                  * create is allowed.
2202                  */
2203
2204                 /*
2205                  * Now the file exists and fsp is successfully opened,
2206                  * fsp->dev and fsp->inode are valid and should replace the
2207                  * dev=0,inode=0 from a non existent file. Spotted by
2208                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2209                  */
2210
2211                 id = fsp->file_id;
2212
2213                 if (!acquire_ordered_locks(talloc_tos(),
2214                                         fsp,
2215                                         id,
2216                                         conn->connectpath,
2217                                         smb_fname,
2218                                         &old_write_time,
2219                                         &lck,
2220                                         &br_lck)) {
2221                         return NT_STATUS_SHARING_VIOLATION;
2222                 }
2223
2224                 /* Get the types we need to examine. */
2225                 find_oplock_types(fsp,
2226                                 oplock_request,
2227                                 lck,
2228                                 &batch_entry,
2229                                 &exclusive_entry,
2230                                 &got_level2_oplock,
2231                                 &got_a_none_oplock);
2232
2233                 /* First pass - send break only on batch oplocks. */
2234                 if ((req != NULL) &&
2235                                 delay_for_batch_oplocks(fsp,
2236                                         req->mid,
2237                                         oplock_request,
2238                                         batch_entry)) {
2239                         schedule_defer_open(lck, request_time, req);
2240                         TALLOC_FREE(lck);
2241                         fd_close(fsp);
2242                         return NT_STATUS_SHARING_VIOLATION;
2243                 }
2244
2245                 status = open_mode_check(conn, lck, fsp->name_hash,
2246                                         access_mask, share_access,
2247                                          create_options, &file_existed);
2248
2249                 if (NT_STATUS_IS_OK(status)) {
2250                         /* We might be going to allow this open. Check oplock
2251                          * status again. */
2252                         /* Second pass - send break for both batch or
2253                          * exclusive oplocks. */
2254                         if ((req != NULL) &&
2255                                         delay_for_exclusive_oplocks(
2256                                                 fsp,
2257                                                 req->mid,
2258                                                 oplock_request,
2259                                                 exclusive_entry)) {
2260                                 schedule_defer_open(lck, request_time, req);
2261                                 TALLOC_FREE(lck);
2262                                 fd_close(fsp);
2263                                 return NT_STATUS_SHARING_VIOLATION;
2264                         }
2265                 }
2266
2267                 if (!NT_STATUS_IS_OK(status)) {
2268                         struct deferred_open_record state;
2269
2270                         state.delayed_for_oplocks = False;
2271                         state.id = id;
2272
2273                         /* Do it all over again immediately. In the second
2274                          * round we will find that the file existed and handle
2275                          * the DELETE_PENDING and FCB cases correctly. No need
2276                          * to duplicate the code here. Essentially this is a
2277                          * "goto top of this function", but don't tell
2278                          * anybody... */
2279
2280                         if (req != NULL) {
2281                                 defer_open(lck, request_time, timeval_zero(),
2282                                            req, &state);
2283                         }
2284                         TALLOC_FREE(lck);
2285                         fd_close(fsp);
2286                         return status;
2287                 }
2288
2289                 grant_fsp_oplock_type(fsp,
2290                                 br_lck,
2291                                 oplock_request,
2292                                 got_level2_oplock,
2293                                 got_a_none_oplock);
2294
2295                 /*
2296                  * We exit this block with the share entry *locked*.....
2297                  */
2298
2299         }
2300
2301         SMB_ASSERT(lck != NULL);
2302
2303         /* Delete streams if create_disposition requires it */
2304         if (file_existed && clear_ads &&
2305             !is_ntfs_stream_smb_fname(smb_fname)) {
2306                 status = delete_all_streams(conn, smb_fname->base_name);
2307                 if (!NT_STATUS_IS_OK(status)) {
2308                         TALLOC_FREE(lck);
2309                         fd_close(fsp);
2310                         return status;
2311                 }
2312         }
2313
2314         /* note that we ignore failure for the following. It is
2315            basically a hack for NFS, and NFS will never set one of
2316            these only read them. Nobody but Samba can ever set a deny
2317            mode and we have already checked our more authoritative
2318            locking database for permission to set this deny mode. If
2319            the kernel refuses the operations then the kernel is wrong.
2320            note that GPFS supports it as well - jmcd */
2321
2322         if (fsp->fh->fd != -1) {
2323                 int ret_flock;
2324                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2325                 if(ret_flock == -1 ){
2326
2327                         TALLOC_FREE(lck);
2328                         fd_close(fsp);
2329
2330                         return NT_STATUS_SHARING_VIOLATION;
2331                 }
2332         }
2333
2334         /*
2335          * At this point onwards, we can guarentee that the share entry
2336          * is locked, whether we created the file or not, and that the
2337          * deny mode is compatible with all current opens.
2338          */
2339
2340         /*
2341          * If requested, truncate the file.
2342          */
2343
2344         if (file_existed && (flags2&O_TRUNC)) {
2345                 /*
2346                  * We are modifing the file after open - update the stat
2347                  * struct..
2348                  */
2349                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2350                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2351                         status = map_nt_error_from_unix(errno);
2352                         TALLOC_FREE(lck);
2353                         fd_close(fsp);
2354                         return status;
2355                 }
2356         }
2357
2358         /*
2359          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2360          * but we don't have to store this - just ignore it on access check.
2361          */
2362         if (conn->sconn->using_smb2) {
2363                 /*
2364                  * SMB2 doesn't return it (according to Microsoft tests).
2365                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2366                  * File created with access = 0x7 (Read, Write, Delete)
2367                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2368                  */
2369                 fsp->access_mask = access_mask;
2370         } else {
2371                 /* But SMB1 does. */
2372                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2373         }
2374
2375         if (file_existed) {
2376                 /* stat opens on existing files don't get oplocks. */
2377                 if (is_stat_open(open_access_mask)) {
2378                         fsp->oplock_type = NO_OPLOCK;
2379                 }
2380
2381                 if (!(flags2 & O_TRUNC)) {
2382                         info = FILE_WAS_OPENED;
2383                 } else {
2384                         info = FILE_WAS_OVERWRITTEN;
2385                 }
2386         } else {
2387                 info = FILE_WAS_CREATED;
2388         }
2389
2390         if (pinfo) {
2391                 *pinfo = info;
2392         }
2393
2394         /*
2395          * Setup the oplock info in both the shared memory and
2396          * file structs.
2397          */
2398
2399         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2400                 /*
2401                  * Could not get the kernel oplock or there are byte-range
2402                  * locks on the file.
2403                  */
2404                 fsp->oplock_type = NO_OPLOCK;
2405         }
2406
2407         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2408                 new_file_created = True;
2409         }
2410
2411         set_share_mode(lck, fsp, get_current_uid(conn),
2412                         req ? req->mid : 0,
2413                        fsp->oplock_type);
2414
2415         /* Handle strange delete on close create semantics. */
2416         if (create_options & FILE_DELETE_ON_CLOSE) {
2417
2418                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2419
2420                 if (!NT_STATUS_IS_OK(status)) {
2421                         /* Remember to delete the mode we just added. */
2422                         del_share_mode(lck, fsp);
2423                         TALLOC_FREE(lck);
2424                         fd_close(fsp);
2425                         return status;
2426                 }
2427                 /* Note that here we set the *inital* delete on close flag,
2428                    not the regular one. The magic gets handled in close. */
2429                 fsp->initial_delete_on_close = True;
2430         }
2431
2432         if (new_file_created) {
2433                 /* Files should be initially set as archive */
2434                 if (lp_map_archive(SNUM(conn)) ||
2435                     lp_store_dos_attributes(SNUM(conn))) {
2436                         if (!posix_open) {
2437                                 if (file_set_dosmode(conn, smb_fname,
2438                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2439                                             parent_dir, true) == 0) {
2440                                         unx_mode = smb_fname->st.st_ex_mode;
2441                                 }
2442                         }
2443                 }
2444         }
2445
2446         /* Determine sparse flag. */
2447         if (posix_open) {
2448                 /* POSIX opens are sparse by default. */
2449                 fsp->is_sparse = true;
2450         } else {
2451                 fsp->is_sparse = (file_existed &&
2452                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2453         }
2454
2455         /*
2456          * Take care of inherited ACLs on created files - if default ACL not
2457          * selected.
2458          */
2459
2460         if (!posix_open && !file_existed && !def_acl) {
2461
2462                 int saved_errno = errno; /* We might get ENOSYS in the next
2463                                           * call.. */
2464
2465                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2466                     errno == ENOSYS) {
2467                         errno = saved_errno; /* Ignore ENOSYS */
2468                 }
2469
2470         } else if (new_unx_mode) {
2471
2472                 int ret = -1;
2473
2474                 /* Attributes need changing. File already existed. */
2475
2476                 {
2477                         int saved_errno = errno; /* We might get ENOSYS in the
2478                                                   * next call.. */
2479                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2480
2481                         if (ret == -1 && errno == ENOSYS) {
2482                                 errno = saved_errno; /* Ignore ENOSYS */
2483                         } else {
2484                                 DEBUG(5, ("open_file_ntcreate: reset "
2485                                           "attributes of file %s to 0%o\n",
2486                                           smb_fname_str_dbg(smb_fname),
2487                                           (unsigned int)new_unx_mode));
2488                                 ret = 0; /* Don't do the fchmod below. */
2489                         }
2490                 }
2491
2492                 if ((ret == -1) &&
2493                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2494                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2495                                   "attributes of file %s to 0%o\n",
2496                                   smb_fname_str_dbg(smb_fname),
2497                                   (unsigned int)new_unx_mode));
2498         }
2499
2500         /* If this is a successful open, we must remove any deferred open
2501          * records. */
2502         if (req != NULL) {
2503                 del_deferred_open_entry(lck, req->mid,
2504                                         sconn_server_id(req->sconn));
2505         }
2506         TALLOC_FREE(lck);
2507
2508         return NT_STATUS_OK;
2509 }
2510
2511
2512 /****************************************************************************
2513  Open a file for for write to ensure that we can fchmod it.
2514 ****************************************************************************/
2515
2516 NTSTATUS open_file_fchmod(connection_struct *conn,
2517                           struct smb_filename *smb_fname,
2518                           files_struct **result)
2519 {
2520         if (!VALID_STAT(smb_fname->st)) {
2521                 return NT_STATUS_INVALID_PARAMETER;
2522         }
2523
2524         return SMB_VFS_CREATE_FILE(
2525                 conn,                                   /* conn */
2526                 NULL,                                   /* req */
2527                 0,                                      /* root_dir_fid */
2528                 smb_fname,                              /* fname */
2529                 FILE_WRITE_DATA,                        /* access_mask */
2530                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2531                     FILE_SHARE_DELETE),
2532                 FILE_OPEN,                              /* create_disposition*/
2533                 0,                                      /* create_options */
2534                 0,                                      /* file_attributes */
2535                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2536                 0,                                      /* allocation_size */
2537                 0,                                      /* private_flags */
2538                 NULL,                                   /* sd */
2539                 NULL,                                   /* ea_list */
2540                 result,                                 /* result */
2541                 NULL);                                  /* pinfo */
2542 }
2543
2544 static NTSTATUS mkdir_internal(connection_struct *conn,
2545                                struct smb_filename *smb_dname,
2546                                uint32 file_attributes)
2547 {
2548         mode_t mode;
2549         char *parent_dir = NULL;
2550         NTSTATUS status;
2551         bool posix_open = false;
2552         bool need_re_stat = false;
2553         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2554
2555         if(access_mask & ~(conn->share_access)) {
2556                 DEBUG(5,("mkdir_internal: failing share access "
2557                          "%s\n", lp_servicename(SNUM(conn))));
2558                 return NT_STATUS_ACCESS_DENIED;
2559         }
2560
2561         status = check_name(conn, smb_dname->base_name);
2562         if (!NT_STATUS_IS_OK(status)) {
2563                 return status;
2564         }
2565
2566         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2567                             NULL)) {
2568                 return NT_STATUS_NO_MEMORY;
2569         }
2570
2571         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2572                 posix_open = true;
2573                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2574         } else {
2575                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2576         }
2577
2578         status = check_parent_access(conn,
2579                                         smb_dname,
2580                                         access_mask,
2581                                         &parent_dir);
2582         if(!NT_STATUS_IS_OK(status)) {
2583                 DEBUG(5,("mkdir_internal: check_parent_access "
2584                         "on directory %s for path %s returned %s\n",
2585                         parent_dir,
2586                         smb_dname->base_name,
2587                         nt_errstr(status) ));
2588                 return status;
2589         }
2590
2591         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2592                 return map_nt_error_from_unix(errno);
2593         }
2594
2595         /* Ensure we're checking for a symlink here.... */
2596         /* We don't want to get caught by a symlink racer. */
2597
2598         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2599                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2600                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2601                 return map_nt_error_from_unix(errno);
2602         }
2603
2604         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2605                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2606                           smb_fname_str_dbg(smb_dname)));
2607                 return NT_STATUS_NOT_A_DIRECTORY;
2608         }
2609
2610         if (lp_store_dos_attributes(SNUM(conn))) {
2611                 if (!posix_open) {
2612                         file_set_dosmode(conn, smb_dname,
2613                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2614                                          parent_dir, true);
2615                 }
2616         }
2617
2618         if (lp_inherit_perms(SNUM(conn))) {
2619                 inherit_access_posix_acl(conn, parent_dir,
2620                                          smb_dname->base_name, mode);
2621                 need_re_stat = true;
2622         }
2623
2624         if (!posix_open) {
2625                 /*
2626                  * Check if high bits should have been set,
2627                  * then (if bits are missing): add them.
2628                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2629                  * dir.
2630                  */
2631                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2632                     (mode & ~smb_dname->st.st_ex_mode)) {
2633                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2634                                       (smb_dname->st.st_ex_mode |
2635                                           (mode & ~smb_dname->st.st_ex_mode)));
2636                         need_re_stat = true;
2637                 }
2638         }
2639
2640         /* Change the owner if required. */
2641         if (lp_inherit_owner(SNUM(conn))) {
2642                 change_dir_owner_to_parent(conn, parent_dir,
2643                                            smb_dname->base_name,
2644                                            &smb_dname->st);
2645                 need_re_stat = true;
2646         }
2647
2648         if (need_re_stat) {
2649                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2650                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2651                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2652                         return map_nt_error_from_unix(errno);
2653                 }
2654         }
2655
2656         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2657                      smb_dname->base_name);
2658
2659         return NT_STATUS_OK;
2660 }
2661
2662 /****************************************************************************
2663  Ensure we didn't get symlink raced on opening a directory.
2664 ****************************************************************************/
2665
2666 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2667                         const SMB_STRUCT_STAT *sbuf2)
2668 {
2669         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2670                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2671                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2672                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2673                 return false;
2674         }
2675         return true;
2676 }
2677
2678 /****************************************************************************
2679  Open a directory from an NT SMB call.
2680 ****************************************************************************/
2681
2682 static NTSTATUS open_directory(connection_struct *conn,
2683                                struct smb_request *req,
2684                                struct smb_filename *smb_dname,
2685                                uint32 access_mask,
2686                                uint32 share_access,
2687                                uint32 create_disposition,
2688                                uint32 create_options,
2689                                uint32 file_attributes,
2690                                int *pinfo,
2691                                files_struct **result)
2692 {
2693         files_struct *fsp = NULL;
2694         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2695         struct share_mode_lock *lck = NULL;
2696         NTSTATUS status;
2697         struct timespec mtimespec;
2698         int info = 0;
2699
2700         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2701
2702         /* Ensure we have a directory attribute. */
2703         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2704
2705         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2706                  "share_access = 0x%x create_options = 0x%x, "
2707                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2708                  smb_fname_str_dbg(smb_dname),
2709                  (unsigned int)access_mask,
2710                  (unsigned int)share_access,
2711                  (unsigned int)create_options,
2712                  (unsigned int)create_disposition,
2713                  (unsigned int)file_attributes));
2714
2715         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2716                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2717                         is_ntfs_stream_smb_fname(smb_dname)) {
2718                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2719                           smb_fname_str_dbg(smb_dname)));
2720                 return NT_STATUS_NOT_A_DIRECTORY;
2721         }
2722
2723         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2724                                             access_mask, &access_mask);
2725         if (!NT_STATUS_IS_OK(status)) {
2726                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2727                         "on file %s returned %s\n",
2728                         smb_fname_str_dbg(smb_dname),
2729                         nt_errstr(status)));
2730                 return status;
2731         }
2732
2733         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2734                         !security_token_has_privilege(get_current_nttok(conn),
2735                                         SEC_PRIV_SECURITY)) {
2736                 DEBUG(10, ("open_directory: open on %s "
2737                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2738                         smb_fname_str_dbg(smb_dname)));
2739                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2740         }
2741
2742         switch( create_disposition ) {
2743                 case FILE_OPEN:
2744
2745                         if (!dir_existed) {
2746                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2747                         }
2748
2749                         info = FILE_WAS_OPENED;
2750                         break;
2751
2752                 case FILE_CREATE:
2753
2754                         /* If directory exists error. If directory doesn't
2755                          * exist create. */
2756
2757                         if (dir_existed) {
2758                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2759                                 DEBUG(2, ("open_directory: unable to create "
2760                                           "%s. Error was %s\n",
2761                                           smb_fname_str_dbg(smb_dname),
2762                                           nt_errstr(status)));
2763                                 return status;
2764                         }
2765
2766                         status = mkdir_internal(conn, smb_dname,
2767                                                 file_attributes);
2768
2769                         if (!NT_STATUS_IS_OK(status)) {
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
2777                         info = FILE_WAS_CREATED;
2778                         break;
2779
2780                 case FILE_OPEN_IF:
2781                         /*
2782                          * If directory exists open. If directory doesn't
2783                          * exist create.
2784                          */
2785
2786                         if (dir_existed) {
2787                                 status = NT_STATUS_OK;
2788                                 info = FILE_WAS_OPENED;
2789                         } else {
2790                                 status = mkdir_internal(conn, smb_dname,
2791                                                 file_attributes);
2792
2793                                 if (NT_STATUS_IS_OK(status)) {
2794                                         info = FILE_WAS_CREATED;
2795                                 } else {
2796                                         /* Cope with create race. */
2797                                         if (!NT_STATUS_EQUAL(status,
2798                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2799                                                 DEBUG(2, ("open_directory: unable to create "
2800                                                         "%s. Error was %s\n",
2801                                                         smb_fname_str_dbg(smb_dname),
2802                                                         nt_errstr(status)));
2803                                                 return status;
2804                                         }
2805                                         info = FILE_WAS_OPENED;
2806                                 }
2807                         }
2808
2809                         break;
2810
2811                 case FILE_SUPERSEDE:
2812                 case FILE_OVERWRITE:
2813                 case FILE_OVERWRITE_IF:
2814                 default:
2815                         DEBUG(5,("open_directory: invalid create_disposition "
2816                                  "0x%x for directory %s\n",
2817                                  (unsigned int)create_disposition,
2818                                  smb_fname_str_dbg(smb_dname)));
2819                         return NT_STATUS_INVALID_PARAMETER;
2820         }
2821
2822         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2823                 DEBUG(5,("open_directory: %s is not a directory !\n",
2824                          smb_fname_str_dbg(smb_dname)));
2825                 return NT_STATUS_NOT_A_DIRECTORY;
2826         }
2827
2828         if (info == FILE_WAS_OPENED) {
2829                 status = smbd_check_open_rights(conn, smb_dname, access_mask);
2830                 if (!NT_STATUS_IS_OK(status)) {
2831                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2832                                 "file %s failed with %s\n",
2833                                 smb_fname_str_dbg(smb_dname),
2834                                 nt_errstr(status)));
2835                         return status;
2836                 }
2837         }
2838
2839         status = file_new(req, conn, &fsp);
2840         if(!NT_STATUS_IS_OK(status)) {
2841                 return status;
2842         }
2843
2844         /*
2845          * Setup the files_struct for it.
2846          */
2847
2848         fsp->mode = smb_dname->st.st_ex_mode;
2849         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2850         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2851         fsp->file_pid = req ? req->smbpid : 0;
2852         fsp->can_lock = False;
2853         fsp->can_read = False;
2854         fsp->can_write = False;
2855
2856         fsp->share_access = share_access;
2857         fsp->fh->private_options = 0;
2858         /*
2859          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2860          */
2861         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2862         fsp->print_file = NULL;
2863         fsp->modified = False;
2864         fsp->oplock_type = NO_OPLOCK;
2865         fsp->sent_oplock_break = NO_BREAK_SENT;
2866         fsp->is_directory = True;
2867         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2868         status = fsp_set_smb_fname(fsp, smb_dname);
2869         if (!NT_STATUS_IS_OK(status)) {
2870                 file_free(req, fsp);
2871                 return status;
2872         }
2873
2874         mtimespec = smb_dname->st.st_ex_mtime;
2875
2876 #ifdef O_DIRECTORY
2877         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2878 #else
2879         /* POSIX allows us to open a directory with O_RDONLY. */
2880         status = fd_open(conn, fsp, O_RDONLY, 0);
2881 #endif
2882         if (!NT_STATUS_IS_OK(status)) {
2883                 DEBUG(5, ("open_directory: Could not open fd for "
2884                         "%s (%s)\n",
2885                         smb_fname_str_dbg(smb_dname),
2886                         nt_errstr(status)));
2887                 file_free(req, fsp);
2888                 return status;
2889         }
2890
2891         status = vfs_stat_fsp(fsp);
2892         if (!NT_STATUS_IS_OK(status)) {
2893                 fd_close(fsp);
2894                 file_free(req, fsp);
2895                 return status;
2896         }
2897
2898         /* Ensure there was no race condition. */
2899         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2900                 DEBUG(5,("open_directory: stat struct differs for "
2901                         "directory %s.\n",
2902                         smb_fname_str_dbg(smb_dname)));
2903                 fd_close(fsp);
2904                 file_free(req, fsp);
2905                 return NT_STATUS_ACCESS_DENIED;
2906         }
2907
2908         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2909                                   conn->connectpath, smb_dname, &mtimespec);
2910
2911         if (lck == NULL) {
2912                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2913                           "%s\n", smb_fname_str_dbg(smb_dname)));
2914                 fd_close(fsp);
2915                 file_free(req, fsp);
2916                 return NT_STATUS_SHARING_VIOLATION;
2917         }
2918
2919         status = open_mode_check(conn, lck, fsp->name_hash,
2920                                 access_mask, share_access,
2921                                  create_options, &dir_existed);
2922
2923         if (!NT_STATUS_IS_OK(status)) {
2924                 TALLOC_FREE(lck);
2925                 fd_close(fsp);
2926                 file_free(req, fsp);
2927                 return status;
2928         }
2929
2930         set_share_mode(lck, fsp, get_current_uid(conn),
2931                         req ? req->mid : 0, NO_OPLOCK);
2932
2933         /* For directories the delete on close bit at open time seems
2934            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2935         if (create_options & FILE_DELETE_ON_CLOSE) {
2936                 status = can_set_delete_on_close(fsp, 0);
2937                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2938                         TALLOC_FREE(lck);
2939                         fd_close(fsp);
2940                         file_free(req, fsp);
2941                         return status;
2942                 }
2943
2944                 if (NT_STATUS_IS_OK(status)) {
2945                         /* Note that here we set the *inital* delete on close flag,
2946                            not the regular one. The magic gets handled in close. */
2947                         fsp->initial_delete_on_close = True;
2948                 }
2949         }
2950
2951         TALLOC_FREE(lck);
2952
2953         if (pinfo) {
2954                 *pinfo = info;
2955         }
2956
2957         *result = fsp;
2958         return NT_STATUS_OK;
2959 }
2960
2961 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2962                           struct smb_filename *smb_dname)
2963 {
2964         NTSTATUS status;
2965         files_struct *fsp;
2966
2967         status = SMB_VFS_CREATE_FILE(
2968                 conn,                                   /* conn */
2969                 req,                                    /* req */
2970                 0,                                      /* root_dir_fid */
2971                 smb_dname,                              /* fname */
2972                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2973                 FILE_SHARE_NONE,                        /* share_access */
2974                 FILE_CREATE,                            /* create_disposition*/
2975                 FILE_DIRECTORY_FILE,                    /* create_options */
2976                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2977                 0,                                      /* oplock_request */
2978                 0,                                      /* allocation_size */
2979                 0,                                      /* private_flags */
2980                 NULL,                                   /* sd */
2981                 NULL,                                   /* ea_list */
2982                 &fsp,                                   /* result */
2983                 NULL);                                  /* pinfo */
2984
2985         if (NT_STATUS_IS_OK(status)) {
2986                 close_file(req, fsp, NORMAL_CLOSE);
2987         }
2988
2989         return status;
2990 }
2991
2992 /****************************************************************************
2993  Receive notification that one of our open files has been renamed by another
2994  smbd process.
2995 ****************************************************************************/
2996
2997 void msg_file_was_renamed(struct messaging_context *msg,
2998                           void *private_data,
2999                           uint32_t msg_type,
3000                           struct server_id server_id,
3001                           DATA_BLOB *data)
3002 {
3003         struct smbd_server_connection *sconn;
3004         files_struct *fsp;
3005         char *frm = (char *)data->data;
3006         struct file_id id;
3007         const char *sharepath;
3008         const char *base_name;
3009         const char *stream_name;
3010         struct smb_filename *smb_fname = NULL;
3011         size_t sp_len, bn_len;
3012         NTSTATUS status;
3013
3014         sconn = msg_ctx_to_sconn(msg);
3015         if (sconn == NULL) {
3016                 DEBUG(1, ("could not find sconn\n"));
3017                 return;
3018         }
3019
3020         if (data->data == NULL
3021             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3022                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3023                           (int)data->length));
3024                 return;
3025         }
3026
3027         /* Unpack the message. */
3028         pull_file_id_24(frm, &id);
3029         sharepath = &frm[24];
3030         sp_len = strlen(sharepath);
3031         base_name = sharepath + sp_len + 1;
3032         bn_len = strlen(base_name);
3033         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3034
3035         /* stream_name must always be NULL if there is no stream. */
3036         if (stream_name[0] == '\0') {
3037                 stream_name = NULL;
3038         }
3039
3040         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3041                                             stream_name, NULL, &smb_fname);
3042         if (!NT_STATUS_IS_OK(status)) {
3043                 return;
3044         }
3045
3046         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3047                 "file_id %s\n",
3048                 sharepath, smb_fname_str_dbg(smb_fname),
3049                 file_id_string_tos(&id)));
3050
3051         for(fsp = file_find_di_first(sconn, id); fsp;
3052             fsp = file_find_di_next(fsp)) {
3053                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3054
3055                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3056                                 fsp->fnum, fsp_str_dbg(fsp),
3057                                 smb_fname_str_dbg(smb_fname)));
3058                         status = fsp_set_smb_fname(fsp, smb_fname);
3059                         if (!NT_STATUS_IS_OK(status)) {
3060                                 goto out;
3061                         }
3062                 } else {
3063                         /* TODO. JRA. */
3064                         /* Now we have the complete path we can work out if this is
3065                            actually within this share and adjust newname accordingly. */
3066                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3067                                 "not sharepath %s) "
3068                                 "fnum %d from %s -> %s\n",
3069                                 fsp->conn->connectpath,
3070                                 sharepath,
3071                                 fsp->fnum,
3072                                 fsp_str_dbg(fsp),
3073                                 smb_fname_str_dbg(smb_fname)));
3074                 }
3075         }
3076  out:
3077         TALLOC_FREE(smb_fname);
3078         return;
3079 }
3080
3081 /*
3082  * If a main file is opened for delete, all streams need to be checked for
3083  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3084  * If that works, delete them all by setting the delete on close and close.
3085  */
3086
3087 NTSTATUS open_streams_for_delete(connection_struct *conn,
3088                                         const char *fname)
3089 {
3090         struct stream_struct *stream_info = NULL;
3091         files_struct **streams = NULL;
3092         int i;
3093         unsigned int num_streams = 0;
3094         TALLOC_CTX *frame = talloc_stackframe();
3095         NTSTATUS status;
3096
3097         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3098                                 &num_streams, &stream_info);
3099
3100         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3101             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3102                 DEBUG(10, ("no streams around\n"));
3103                 TALLOC_FREE(frame);
3104                 return NT_STATUS_OK;
3105         }
3106
3107         if (!NT_STATUS_IS_OK(status)) {
3108                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3109                            nt_errstr(status)));
3110                 goto fail;
3111         }
3112
3113         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3114                    num_streams));
3115
3116         if (num_streams == 0) {
3117                 TALLOC_FREE(frame);
3118                 return NT_STATUS_OK;
3119         }
3120
3121         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3122         if (streams == NULL) {
3123                 DEBUG(0, ("talloc failed\n"));
3124                 status = NT_STATUS_NO_MEMORY;
3125                 goto fail;
3126         }
3127
3128         for (i=0; i<num_streams; i++) {
3129                 struct smb_filename *smb_fname = NULL;
3130
3131                 if (strequal(stream_info[i].name, "::$DATA")) {
3132                         streams[i] = NULL;
3133                         continue;
3134                 }
3135
3136                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3137                                                     stream_info[i].name,
3138                                                     NULL, &smb_fname);
3139                 if (!NT_STATUS_IS_OK(status)) {
3140                         goto fail;
3141                 }
3142
3143                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3144                         DEBUG(10, ("Unable to stat stream: %s\n",
3145                                    smb_fname_str_dbg(smb_fname)));
3146                 }
3147
3148                 status = SMB_VFS_CREATE_FILE(
3149                          conn,                  /* conn */
3150                          NULL,                  /* req */
3151                          0,                     /* root_dir_fid */
3152                          smb_fname,             /* fname */
3153                          DELETE_ACCESS,         /* access_mask */
3154                          (FILE_SHARE_READ |     /* share_access */
3155                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3156                          FILE_OPEN,             /* create_disposition*/
3157                          0,                     /* create_options */
3158                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3159                          0,                     /* oplock_request */
3160                          0,                     /* allocation_size */
3161                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3162                          NULL,                  /* sd */
3163                          NULL,                  /* ea_list */
3164                          &streams[i],           /* result */
3165                          NULL);                 /* pinfo */
3166
3167                 if (!NT_STATUS_IS_OK(status)) {
3168                         DEBUG(10, ("Could not open stream %s: %s\n",
3169                                    smb_fname_str_dbg(smb_fname),
3170                                    nt_errstr(status)));
3171
3172                         TALLOC_FREE(smb_fname);
3173                         break;
3174                 }
3175                 TALLOC_FREE(smb_fname);
3176         }
3177
3178         /*
3179          * don't touch the variable "status" beyond this point :-)
3180          */
3181
3182         for (i -= 1 ; i >= 0; i--) {
3183                 if (streams[i] == NULL) {
3184                         continue;
3185                 }
3186
3187                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3188                            fsp_str_dbg(streams[i])));
3189                 close_file(NULL, streams[i], NORMAL_CLOSE);
3190         }
3191
3192  fail:
3193         TALLOC_FREE(frame);
3194         return status;
3195 }
3196
3197 /*
3198  * Wrapper around open_file_ntcreate and open_directory
3199  */
3200
3201 static NTSTATUS create_file_unixpath(connection_struct *conn,
3202                                      struct smb_request *req,
3203                                      struct smb_filename *smb_fname,
3204                                      uint32_t access_mask,
3205                                      uint32_t share_access,
3206                                      uint32_t create_disposition,
3207                                      uint32_t create_options,
3208                                      uint32_t file_attributes,
3209                                      uint32_t oplock_request,
3210                                      uint64_t allocation_size,
3211                                      uint32_t private_flags,
3212                                      struct security_descriptor *sd,
3213                                      struct ea_list *ea_list,
3214
3215                                      files_struct **result,
3216                                      int *pinfo)
3217 {
3218         int info = FILE_WAS_OPENED;
3219         files_struct *base_fsp = NULL;
3220         files_struct *fsp = NULL;
3221         NTSTATUS status;
3222
3223         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3224                   "file_attributes = 0x%x, share_access = 0x%x, "
3225                   "create_disposition = 0x%x create_options = 0x%x "
3226                   "oplock_request = 0x%x private_flags = 0x%x "
3227                   "ea_list = 0x%p, sd = 0x%p, "
3228                   "fname = %s\n",
3229                   (unsigned int)access_mask,
3230                   (unsigned int)file_attributes,
3231                   (unsigned int)share_access,
3232                   (unsigned int)create_disposition,
3233                   (unsigned int)create_options,
3234                   (unsigned int)oplock_request,
3235                   (unsigned int)private_flags,
3236                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3237
3238         if (create_options & FILE_OPEN_BY_FILE_ID) {
3239                 status = NT_STATUS_NOT_SUPPORTED;
3240                 goto fail;
3241         }
3242
3243         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3244                 status = NT_STATUS_INVALID_PARAMETER;
3245                 goto fail;
3246         }
3247
3248         if (req == NULL) {
3249                 oplock_request |= INTERNAL_OPEN_ONLY;
3250         }
3251
3252         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3253             && (access_mask & DELETE_ACCESS)
3254             && !is_ntfs_stream_smb_fname(smb_fname)) {
3255                 /*
3256                  * We can't open a file with DELETE access if any of the
3257                  * streams is open without FILE_SHARE_DELETE
3258                  */
3259                 status = open_streams_for_delete(conn, smb_fname->base_name);
3260
3261                 if (!NT_STATUS_IS_OK(status)) {
3262                         goto fail;
3263                 }
3264         }
3265
3266         /* This is the correct thing to do (check every time) but can_delete
3267          * is expensive (it may have to read the parent directory
3268          * permissions). So for now we're not doing it unless we have a strong
3269          * hint the client is really going to delete this file. If the client
3270          * is forcing FILE_CREATE let the filesystem take care of the
3271          * permissions. */
3272
3273         /* Setting FILE_SHARE_DELETE is the hint. */
3274
3275         if ((create_disposition != FILE_CREATE)
3276             && (access_mask & DELETE_ACCESS)
3277             && (!(can_delete_file_in_directory(conn, smb_fname) ||
3278                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3279                 status = NT_STATUS_ACCESS_DENIED;
3280                 DEBUG(10,("create_file_unixpath: open file %s "
3281                           "for delete ACCESS_DENIED\n",
3282                           smb_fname_str_dbg(smb_fname)));
3283                 goto fail;
3284         }
3285
3286         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3287                         !security_token_has_privilege(get_current_nttok(conn),
3288                                         SEC_PRIV_SECURITY)) {
3289                 DEBUG(10, ("create_file_unixpath: open on %s "
3290                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3291                         smb_fname_str_dbg(smb_fname)));
3292                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3293                 goto fail;
3294         }
3295
3296         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3297             && is_ntfs_stream_smb_fname(smb_fname)
3298             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3299                 uint32 base_create_disposition;
3300                 struct smb_filename *smb_fname_base = NULL;
3301
3302                 if (create_options & FILE_DIRECTORY_FILE) {
3303                         status = NT_STATUS_NOT_A_DIRECTORY;
3304                         goto fail;
3305                 }
3306
3307                 switch (create_disposition) {
3308                 case FILE_OPEN:
3309                         base_create_disposition = FILE_OPEN;
3310                         break;
3311                 default:
3312                         base_create_disposition = FILE_OPEN_IF;
3313                         break;
3314                 }
3315
3316                 /* Create an smb_filename with stream_name == NULL. */
3317                 status = create_synthetic_smb_fname(talloc_tos(),
3318                                                     smb_fname->base_name,
3319                                                     NULL, NULL,
3320                                                     &smb_fname_base);
3321                 if (!NT_STATUS_IS_OK(status)) {
3322                         goto fail;
3323                 }
3324
3325                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3326                         DEBUG(10, ("Unable to stat stream: %s\n",
3327                                    smb_fname_str_dbg(smb_fname_base)));
3328                 }
3329
3330                 /* Open the base file. */
3331                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3332                                               FILE_SHARE_READ
3333                                               | FILE_SHARE_WRITE
3334                                               | FILE_SHARE_DELETE,
3335                                               base_create_disposition,
3336                                               0, 0, 0, 0, 0, NULL, NULL,
3337                                               &base_fsp, NULL);
3338                 TALLOC_FREE(smb_fname_base);
3339
3340                 if (!NT_STATUS_IS_OK(status)) {
3341                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3342                                    "%s\n", smb_fname->base_name,
3343                                    nt_errstr(status)));
3344                         goto fail;
3345                 }
3346                 /* we don't need to low level fd */
3347                 fd_close(base_fsp);
3348         }
3349
3350         /*
3351          * If it's a request for a directory open, deal with it separately.
3352          */
3353
3354         if (create_options & FILE_DIRECTORY_FILE) {
3355
3356                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3357                         status = NT_STATUS_INVALID_PARAMETER;
3358                         goto fail;
3359                 }
3360
3361                 /* Can't open a temp directory. IFS kit test. */
3362                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3363                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3364                         status = NT_STATUS_INVALID_PARAMETER;
3365                         goto fail;
3366                 }
3367
3368                 /*
3369                  * We will get a create directory here if the Win32
3370                  * app specified a security descriptor in the
3371                  * CreateDirectory() call.
3372                  */
3373
3374                 oplock_request = 0;
3375                 status = open_directory(
3376                         conn, req, smb_fname, access_mask, share_access,
3377                         create_disposition, create_options, file_attributes,
3378                         &info, &fsp);
3379         } else {
3380
3381                 /*
3382                  * Ordinary file case.
3383                  */
3384
3385                 status = file_new(req, conn, &fsp);
3386                 if(!NT_STATUS_IS_OK(status)) {
3387                         goto fail;
3388                 }
3389
3390                 status = fsp_set_smb_fname(fsp, smb_fname);
3391                 if (!NT_STATUS_IS_OK(status)) {
3392                         goto fail;
3393                 }
3394
3395                 /*
3396                  * We're opening the stream element of a base_fsp
3397                  * we already opened. Set up the base_fsp pointer.
3398                  */
3399                 if (base_fsp) {
3400                         fsp->base_fsp = base_fsp;
3401                 }
3402
3403                 status = open_file_ntcreate(conn,
3404                                             req,
3405                                             access_mask,
3406                                             share_access,
3407                                             create_disposition,
3408                                             create_options,
3409                                             file_attributes,
3410                                             oplock_request,
3411                                             private_flags,
3412                                             &info,
3413                                             fsp);
3414
3415                 if(!NT_STATUS_IS_OK(status)) {
3416                         file_free(req, fsp);
3417                         fsp = NULL;
3418                 }
3419
3420                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3421
3422                         /* A stream open never opens a directory */
3423
3424                         if (base_fsp) {
3425                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3426                                 goto fail;
3427                         }
3428
3429                         /*
3430                          * Fail the open if it was explicitly a non-directory
3431                          * file.
3432                          */
3433
3434                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3435                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3436                                 goto fail;
3437                         }
3438
3439                         oplock_request = 0;
3440                         status = open_directory(
3441                                 conn, req, smb_fname, access_mask,
3442                                 share_access, create_disposition,
3443                                 create_options, file_attributes,
3444                                 &info, &fsp);
3445                 }
3446         }
3447
3448         if (!NT_STATUS_IS_OK(status)) {
3449                 goto fail;
3450         }
3451
3452         fsp->base_fsp = base_fsp;
3453
3454         /*
3455          * According to the MS documentation, the only time the security
3456          * descriptor is applied to the opened file is iff we *created* the
3457          * file; an existing file stays the same.
3458          *
3459          * Also, it seems (from observation) that you can open the file with
3460          * any access mask but you can still write the sd. We need to override
3461          * the granted access before we call set_sd
3462          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3463          */
3464
3465         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3466             && lp_nt_acl_support(SNUM(conn))) {
3467
3468                 uint32_t sec_info_sent;
3469                 uint32_t saved_access_mask = fsp->access_mask;
3470
3471                 sec_info_sent = get_sec_info(sd);
3472
3473                 fsp->access_mask = FILE_GENERIC_ALL;
3474
3475                 /* Convert all the generic bits. */
3476                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3477                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3478
3479                 if (sec_info_sent & (SECINFO_OWNER|
3480                                         SECINFO_GROUP|
3481                                         SECINFO_DACL|
3482                                         SECINFO_SACL)) {
3483                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3484                 }
3485
3486                 fsp->access_mask = saved_access_mask;
3487
3488                 if (!NT_STATUS_IS_OK(status)) {
3489                         goto fail;
3490                 }
3491         }
3492
3493         if ((ea_list != NULL) &&
3494             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3495                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3496                 if (!NT_STATUS_IS_OK(status)) {
3497                         goto fail;
3498                 }
3499         }
3500
3501         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3502                 status = NT_STATUS_ACCESS_DENIED;
3503                 goto fail;
3504         }
3505
3506         /* Save the requested allocation size. */
3507         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3508                 if (allocation_size
3509                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3510                         fsp->initial_allocation_size = smb_roundup(
3511                                 fsp->conn, allocation_size);
3512                         if (fsp->is_directory) {
3513                                 /* Can't set allocation size on a directory. */
3514                                 status = NT_STATUS_ACCESS_DENIED;
3515                                 goto fail;
3516                         }
3517                         if (vfs_allocate_file_space(
3518                                     fsp, fsp->initial_allocation_size) == -1) {
3519                                 status = NT_STATUS_DISK_FULL;
3520                                 goto fail;
3521                         }
3522                 } else {
3523                         fsp->initial_allocation_size = smb_roundup(
3524                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3525                 }
3526         }
3527
3528         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3529
3530         *result = fsp;
3531         if (pinfo != NULL) {
3532                 *pinfo = info;
3533         }
3534
3535         smb_fname->st = fsp->fsp_name->st;
3536
3537         return NT_STATUS_OK;
3538
3539  fail:
3540         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3541
3542         if (fsp != NULL) {
3543                 if (base_fsp && fsp->base_fsp == base_fsp) {
3544                         /*
3545                          * The close_file below will close
3546                          * fsp->base_fsp.
3547                          */
3548                         base_fsp = NULL;
3549                 }
3550                 close_file(req, fsp, ERROR_CLOSE);
3551                 fsp = NULL;
3552         }
3553         if (base_fsp != NULL) {
3554                 close_file(req, base_fsp, ERROR_CLOSE);
3555                 base_fsp = NULL;
3556         }
3557         return status;
3558 }
3559
3560 /*
3561  * Calculate the full path name given a relative fid.
3562  */
3563 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3564                                    struct smb_request *req,
3565                                    uint16_t root_dir_fid,
3566                                    const struct smb_filename *smb_fname,
3567                                    struct smb_filename **smb_fname_out)
3568 {
3569         files_struct *dir_fsp;
3570         char *parent_fname = NULL;
3571         char *new_base_name = NULL;
3572         NTSTATUS status;
3573
3574         if (root_dir_fid == 0 || !smb_fname) {
3575                 status = NT_STATUS_INTERNAL_ERROR;
3576                 goto out;
3577         }
3578
3579         dir_fsp = file_fsp(req, root_dir_fid);
3580
3581         if (dir_fsp == NULL) {
3582                 status = NT_STATUS_INVALID_HANDLE;
3583                 goto out;
3584         }
3585
3586         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3587                 status = NT_STATUS_INVALID_HANDLE;
3588                 goto out;
3589         }
3590
3591         if (!dir_fsp->is_directory) {
3592
3593                 /*
3594                  * Check to see if this is a mac fork of some kind.
3595                  */
3596
3597                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3598                     is_ntfs_stream_smb_fname(smb_fname)) {
3599                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3600                         goto out;
3601                 }
3602
3603                 /*
3604                   we need to handle the case when we get a
3605                   relative open relative to a file and the
3606                   pathname is blank - this is a reopen!
3607                   (hint from demyn plantenberg)
3608                 */
3609
3610                 status = NT_STATUS_INVALID_HANDLE;
3611                 goto out;
3612         }
3613
3614         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3615                 /*
3616                  * We're at the toplevel dir, the final file name
3617                  * must not contain ./, as this is filtered out
3618                  * normally by srvstr_get_path and unix_convert
3619                  * explicitly rejects paths containing ./.
3620                  */
3621                 parent_fname = talloc_strdup(talloc_tos(), "");
3622                 if (parent_fname == NULL) {
3623                         status = NT_STATUS_NO_MEMORY;
3624                         goto out;
3625                 }
3626         } else {
3627                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3628
3629                 /*
3630                  * Copy in the base directory name.
3631                  */
3632
3633                 parent_fname = talloc_array(talloc_tos(), char,
3634                     dir_name_len+2);
3635                 if (parent_fname == NULL) {
3636                         status = NT_STATUS_NO_MEMORY;
3637                         goto out;
3638                 }
3639                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3640                     dir_name_len+1);
3641
3642                 /*
3643                  * Ensure it ends in a '/'.
3644                  * We used TALLOC_SIZE +2 to add space for the '/'.
3645                  */
3646
3647                 if(dir_name_len
3648                     && (parent_fname[dir_name_len-1] != '\\')
3649                     && (parent_fname[dir_name_len-1] != '/')) {
3650                         parent_fname[dir_name_len] = '/';
3651                         parent_fname[dir_name_len+1] = '\0';
3652                 }
3653         }
3654
3655         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3656                                         smb_fname->base_name);
3657         if (new_base_name == NULL) {
3658                 status = NT_STATUS_NO_MEMORY;
3659                 goto out;
3660         }
3661
3662         status = filename_convert(req,
3663                                 conn,
3664                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3665                                 new_base_name,
3666                                 0,
3667                                 NULL,
3668                                 smb_fname_out);
3669         if (!NT_STATUS_IS_OK(status)) {
3670                 goto out;
3671         }
3672
3673  out:
3674         TALLOC_FREE(parent_fname);
3675         TALLOC_FREE(new_base_name);
3676         return status;
3677 }
3678
3679 NTSTATUS create_file_default(connection_struct *conn,
3680                              struct smb_request *req,
3681                              uint16_t root_dir_fid,
3682                              struct smb_filename *smb_fname,
3683                              uint32_t access_mask,
3684                              uint32_t share_access,
3685                              uint32_t create_disposition,
3686                              uint32_t create_options,
3687                              uint32_t file_attributes,
3688                              uint32_t oplock_request,
3689                              uint64_t allocation_size,
3690                              uint32_t private_flags,
3691                              struct security_descriptor *sd,
3692                              struct ea_list *ea_list,
3693                              files_struct **result,
3694                              int *pinfo)
3695 {
3696         int info = FILE_WAS_OPENED;
3697         files_struct *fsp = NULL;
3698         NTSTATUS status;
3699         bool stream_name = false;
3700
3701         DEBUG(10,("create_file: access_mask = 0x%x "
3702                   "file_attributes = 0x%x, share_access = 0x%x, "
3703                   "create_disposition = 0x%x create_options = 0x%x "
3704                   "oplock_request = 0x%x "
3705                   "private_flags = 0x%x "
3706                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3707                   "fname = %s\n",
3708                   (unsigned int)access_mask,
3709                   (unsigned int)file_attributes,
3710                   (unsigned int)share_access,
3711                   (unsigned int)create_disposition,
3712                   (unsigned int)create_options,
3713                   (unsigned int)oplock_request,
3714                   (unsigned int)private_flags,
3715                   (unsigned int)root_dir_fid,
3716                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3717
3718         /*
3719          * Calculate the filename from the root_dir_if if necessary.
3720          */
3721
3722         if (root_dir_fid != 0) {
3723                 struct smb_filename *smb_fname_out = NULL;
3724                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3725                                                    smb_fname, &smb_fname_out);
3726                 if (!NT_STATUS_IS_OK(status)) {
3727                         goto fail;
3728                 }
3729                 smb_fname = smb_fname_out;
3730         }
3731
3732         /*
3733          * Check to see if this is a mac fork of some kind.
3734          */
3735
3736         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3737         if (stream_name) {
3738                 enum FAKE_FILE_TYPE fake_file_type;
3739
3740                 fake_file_type = is_fake_file(smb_fname);
3741
3742                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3743
3744                         /*
3745                          * Here we go! support for changing the disk quotas
3746                          * --metze
3747                          *
3748                          * We need to fake up to open this MAGIC QUOTA file
3749                          * and return a valid FID.
3750                          *
3751                          * w2k close this file directly after openening xp
3752                          * also tries a QUERY_FILE_INFO on the file and then
3753                          * close it
3754                          */
3755                         status = open_fake_file(req, conn, req->vuid,
3756                                                 fake_file_type, smb_fname,
3757                                                 access_mask, &fsp);
3758                         if (!NT_STATUS_IS_OK(status)) {
3759                                 goto fail;
3760                         }
3761
3762                         ZERO_STRUCT(smb_fname->st);
3763                         goto done;
3764                 }
3765
3766                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3767                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3768                         goto fail;
3769                 }
3770         }
3771
3772         /* All file access must go through check_name() */
3773
3774         status = check_name(conn, smb_fname->base_name);
3775         if (!NT_STATUS_IS_OK(status)) {
3776                 goto fail;
3777         }
3778
3779         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3780                 int ret;
3781                 smb_fname->stream_name = NULL;
3782                 /* We have to handle this error here. */
3783                 if (create_options & FILE_DIRECTORY_FILE) {
3784                         status = NT_STATUS_NOT_A_DIRECTORY;
3785                         goto fail;
3786                 }
3787                 if (lp_posix_pathnames()) {
3788                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3789                 } else {
3790                         ret = SMB_VFS_STAT(conn, smb_fname);
3791                 }
3792
3793                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3794                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3795                         goto fail;
3796                 }
3797         }
3798
3799         status = create_file_unixpath(
3800                 conn, req, smb_fname, access_mask, share_access,
3801                 create_disposition, create_options, file_attributes,
3802                 oplock_request, allocation_size, private_flags,
3803                 sd, ea_list,
3804                 &fsp, &info);
3805
3806         if (!NT_STATUS_IS_OK(status)) {
3807                 goto fail;
3808         }
3809
3810  done:
3811         DEBUG(10, ("create_file: info=%d\n", info));
3812
3813         *result = fsp;
3814         if (pinfo != NULL) {
3815                 *pinfo = info;
3816         }
3817         return NT_STATUS_OK;
3818
3819  fail:
3820         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3821
3822         if (fsp != NULL) {
3823                 close_file(req, fsp, ERROR_CLOSE);
3824                 fsp = NULL;
3825         }
3826         return status;
3827 }