source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "auth.h"
  32 #include "messages.h"
  33
  34 extern const struct generic_mapping file_generic_mapping;
  35
  36 struct deferred_open_record {
  37         bool delayed_for_oplocks;
  38         struct file_id id;
  39 };
  40
  41 /****************************************************************************
  42  If the requester wanted DELETE_ACCESS and was rejected because
  43  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  44  ovverrides this.
  45 ****************************************************************************/
  46
  47 static bool parent_override_delete(connection_struct *conn,
  48                                         const struct smb_filename *smb_fname,
  49                                         uint32_t access_mask,
  50                                         uint32_t rejected_mask)
  51 {
  52         if ((access_mask & DELETE_ACCESS) &&
  53                     (rejected_mask & DELETE_ACCESS) &&
  54                     can_delete_file_in_directory(conn, smb_fname)) {
  55                 return true;
  56         }
  57         return false;
  58 }
  59
  60 /****************************************************************************
  61  Check if we have open rights.
  62 ****************************************************************************/
  63
  64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  65                                 const struct smb_filename *smb_fname,
  66                                 uint32_t access_mask)
  67 {
  68         /* Check if we have rights to open. */
  69         NTSTATUS status;
  70         struct security_descriptor *sd = NULL;
  71         uint32_t rejected_share_access;
  72         uint32_t rejected_mask = access_mask;
  73
  74         rejected_share_access = access_mask & ~(conn->share_access);
  75
  76         if (rejected_share_access) {
  77                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  78                         "on %s (0x%x)\n",
  79                         (unsigned int)access_mask,
  80                         smb_fname_str_dbg(smb_fname),
  81                         (unsigned int)rejected_share_access ));
  82                 return NT_STATUS_ACCESS_DENIED;
  83         }
  84
  85         if (get_current_uid(conn) == (uid_t)0) {
  86                 /* I'm sorry sir, I didn't know you were root... */
  87                 DEBUG(10,("smbd_check_access_rights: root override "
  88                         "on %s. Granting 0x%x\n",
  89                         smb_fname_str_dbg(smb_fname),
  90                         (unsigned int)access_mask ));
  91                 return NT_STATUS_OK;
  92         }
  93
  94         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  95                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
  96                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  97                         smb_fname_str_dbg(smb_fname),
  98                         (unsigned int)access_mask ));
  99                 return NT_STATUS_OK;
 100         }
 101
 102         if (access_mask == DELETE_ACCESS &&
 103                         VALID_STAT(smb_fname->st) &&
 104                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 105                 /* We can always delete a symlink. */
 106                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 107                         "on DELETE_ACCESS on symlink %s.\n",
 108                         smb_fname_str_dbg(smb_fname) ));
 109                 return NT_STATUS_OK;
 110         }
 111
 112         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 113                         (SECINFO_OWNER |
 114                         SECINFO_GROUP |
 115                         SECINFO_DACL),&sd);
 116
 117         if (!NT_STATUS_IS_OK(status)) {
 118                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 119                         "on %s: %s\n",
 120                         smb_fname_str_dbg(smb_fname),
 121                         nt_errstr(status)));
 122
 123                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 124                         goto access_denied;
 125                 }
 126
 127                 return status;
 128         }
 129
 130         /*
 131          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 132          * owner WRITE_DAC and READ_CONTROL.
 133          */
 134         status = se_access_check(sd,
 135                                 get_current_nttok(conn),
 136                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 137                                 &rejected_mask);
 138
 139         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 140                 "0x%x returning 0x%x (%s)\n",
 141                 smb_fname_str_dbg(smb_fname),
 142                 (unsigned int)access_mask,
 143                 (unsigned int)rejected_mask,
 144                 nt_errstr(status) ));
 145
 146         if (!NT_STATUS_IS_OK(status)) {
 147                 if (DEBUGLEVEL >= 10) {
 148                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 149                                 smb_fname_str_dbg(smb_fname) ));
 150                         NDR_PRINT_DEBUG(security_descriptor, sd);
 151                 }
 152         }
 153
 154         TALLOC_FREE(sd);
 155
 156         if (NT_STATUS_IS_OK(status) ||
 157                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 158                 return status;
 159         }
 160
 161         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 162
 163   access_denied:
 164
 165         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 166                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 167                         (lp_map_readonly(SNUM(conn)) ||
 168                         lp_map_archive(SNUM(conn)) ||
 169                         lp_map_hidden(SNUM(conn)) ||
 170                         lp_map_system(SNUM(conn)))) {
 171                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 172
 173                 DEBUG(10,("smbd_check_access_rights: "
 174                         "overrode "
 175                         "FILE_WRITE_ATTRIBUTES "
 176                         "on file %s\n",
 177                         smb_fname_str_dbg(smb_fname)));
 178         }
 179
 180         if (parent_override_delete(conn,
 181                                 smb_fname,
 182                                 access_mask,
 183                                 rejected_mask)) {
 184                 /* Were we trying to do an open
 185                  * for delete and didn't get DELETE
 186                  * access (only) ? Check if the
 187                  * directory allows DELETE_CHILD.
 188                  * See here:
 189                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 190                  * for details. */
 191
 192                 rejected_mask &= ~DELETE_ACCESS;
 193
 194                 DEBUG(10,("smbd_check_access_rights: "
 195                         "overrode "
 196                         "DELETE_ACCESS on "
 197                         "file %s\n",
 198                         smb_fname_str_dbg(smb_fname)));
 199         }
 200
 201         if (rejected_mask != 0) {
 202                 return NT_STATUS_ACCESS_DENIED;
 203         } else {
 204                 return NT_STATUS_OK;
 205         }
 206 }
 207
 208 static NTSTATUS check_parent_access(struct connection_struct *conn,
 209                                 struct smb_filename *smb_fname,
 210                                 uint32_t access_mask,
 211                                 char **pp_parent_dir)
 212 {
 213         NTSTATUS status;
 214         char *parent_dir = NULL;
 215         struct security_descriptor *parent_sd = NULL;
 216         uint32_t access_granted = 0;
 217
 218         if (!parent_dirname(talloc_tos(),
 219                                 smb_fname->base_name,
 220                                 &parent_dir,
 221                                 NULL)) {
 222                 return NT_STATUS_NO_MEMORY;
 223         }
 224
 225         if (pp_parent_dir) {
 226                 *pp_parent_dir = parent_dir;
 227         }
 228
 229         if (get_current_uid(conn) == (uid_t)0) {
 230                 /* I'm sorry sir, I didn't know you were root... */
 231                 DEBUG(10,("check_parent_access: root override "
 232                         "on %s. Granting 0x%x\n",
 233                         smb_fname_str_dbg(smb_fname),
 234                         (unsigned int)access_mask ));
 235                 return NT_STATUS_OK;
 236         }
 237
 238         status = SMB_VFS_GET_NT_ACL(conn,
 239                                 parent_dir,
 240                                 SECINFO_DACL,
 241                                 &parent_sd);
 242
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 245                         "%s with error %s\n",
 246                         parent_dir,
 247                         nt_errstr(status)));
 248                 return status;
 249         }
 250
 251         /*
 252          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 253          * owner WRITE_DAC and READ_CONTROL.
 254          */
 255         status = se_access_check(parent_sd,
 256                                 get_current_nttok(conn),
 257                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 258                                 &access_granted);
 259         if(!NT_STATUS_IS_OK(status)) {
 260                 DEBUG(5,("check_parent_access: access check "
 261                         "on directory %s for "
 262                         "path %s for mask 0x%x returned (0x%x) %s\n",
 263                         parent_dir,
 264                         smb_fname->base_name,
 265                         access_mask,
 266                         access_granted,
 267                         nt_errstr(status) ));
 268                 return status;
 269         }
 270
 271         return NT_STATUS_OK;
 272 }
 273
 274 /****************************************************************************
 275  fd support routines - attempt to do a dos_open.
 276 ****************************************************************************/
 277
 278 static NTSTATUS fd_open(struct connection_struct *conn,
 279                     files_struct *fsp,
 280                     int flags,
 281                     mode_t mode)
 282 {
 283         struct smb_filename *smb_fname = fsp->fsp_name;
 284         NTSTATUS status = NT_STATUS_OK;
 285
 286 #ifdef O_NOFOLLOW
 287         /*
 288          * Never follow symlinks on a POSIX client. The
 289          * client should be doing this.
 290          */
 291
 292         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 293                 flags |= O_NOFOLLOW;
 294         }
 295 #endif
 296
 297         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 298         if (fsp->fh->fd == -1) {
 299                 status = map_nt_error_from_unix(errno);
 300                 if (errno == EMFILE) {
 301                         static time_t last_warned = 0L;
 302
 303                         if (time((time_t *) NULL) > last_warned) {
 304                                 DEBUG(0,("Too many open files, unable "
 305                                         "to open more!  smbd's max "
 306                                         "open files = %d\n",
 307                                         lp_max_open_files()));
 308                                 last_warned = time((time_t *) NULL);
 309                         }
 310                 }
 311
 312         }
 313
 314         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 315                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 316                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 317
 318         return status;
 319 }
 320
 321 /****************************************************************************
 322  Close the file associated with a fsp.
 323 ****************************************************************************/
 324
 325 NTSTATUS fd_close(files_struct *fsp)
 326 {
 327         int ret;
 328
 329         if (fsp->dptr) {
 330                 dptr_CloseDir(fsp);
 331         }
 332         if (fsp->fh->fd == -1) {
 333                 return NT_STATUS_OK; /* What we used to call a stat open. */
 334         }
 335         if (fsp->fh->ref_count > 1) {
 336                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 337         }
 338
 339         ret = SMB_VFS_CLOSE(fsp);
 340         fsp->fh->fd = -1;
 341         if (ret == -1) {
 342                 return map_nt_error_from_unix(errno);
 343         }
 344         return NT_STATUS_OK;
 345 }
 346
 347 /****************************************************************************
 348  Change the ownership of a file to that of the parent directory.
 349  Do this by fd if possible.
 350 ****************************************************************************/
 351
 352 void change_file_owner_to_parent(connection_struct *conn,
 353                                         const char *inherit_from_dir,
 354                                         files_struct *fsp)
 355 {
 356         struct smb_filename *smb_fname_parent = NULL;
 357         NTSTATUS status;
 358         int ret;
 359
 360         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 361                                             NULL, NULL, &smb_fname_parent);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 return;
 364         }
 365
 366         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 367         if (ret == -1) {
 368                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 369                          "directory %s. Error was %s\n",
 370                          smb_fname_str_dbg(smb_fname_parent),
 371                          strerror(errno)));
 372                 TALLOC_FREE(smb_fname_parent);
 373                 return;
 374         }
 375
 376         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 377                 /* Already this uid - no need to change. */
 378                 DEBUG(10,("change_file_owner_to_parent: file %s "
 379                         "is already owned by uid %d\n",
 380                         fsp_str_dbg(fsp),
 381                         (int)fsp->fsp_name->st.st_ex_uid ));
 382                 TALLOC_FREE(smb_fname_parent);
 383                 return;
 384         }
 385
 386         become_root();
 387         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 388         unbecome_root();
 389         if (ret == -1) {
 390                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 391                          "file %s to parent directory uid %u. Error "
 392                          "was %s\n", fsp_str_dbg(fsp),
 393                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 394                          strerror(errno) ));
 395         } else {
 396                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 397                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 398                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 399                 /* Ensure the uid entry is updated. */
 400                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 401         }
 402
 403         TALLOC_FREE(smb_fname_parent);
 404 }
 405
 406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 407                                        const char *inherit_from_dir,
 408                                        const char *fname,
 409                                        SMB_STRUCT_STAT *psbuf)
 410 {
 411         struct smb_filename *smb_fname_parent = NULL;
 412         struct smb_filename *smb_fname_cwd = NULL;
 413         char *saved_dir = NULL;
 414         TALLOC_CTX *ctx = talloc_tos();
 415         NTSTATUS status = NT_STATUS_OK;
 416         int ret;
 417
 418         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 419                                             &smb_fname_parent);
 420         if (!NT_STATUS_IS_OK(status)) {
 421                 return status;
 422         }
 423
 424         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 425         if (ret == -1) {
 426                 status = map_nt_error_from_unix(errno);
 427                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 428                          "directory %s. Error was %s\n",
 429                          smb_fname_str_dbg(smb_fname_parent),
 430                          strerror(errno)));
 431                 goto out;
 432         }
 433
 434         /* We've already done an lstat into psbuf, and we know it's a
 435            directory. If we can cd into the directory and the dev/ino
 436            are the same then we can safely chown without races as
 437            we're locking the directory in place by being in it.  This
 438            should work on any UNIX (thanks tridge :-). JRA.
 439         */
 440
 441         saved_dir = vfs_GetWd(ctx,conn);
 442         if (!saved_dir) {
 443                 status = map_nt_error_from_unix(errno);
 444                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 445                          "current working directory. Error was %s\n",
 446                          strerror(errno)));
 447                 goto out;
 448         }
 449
 450         /* Chdir into the new path. */
 451         if (vfs_ChDir(conn, fname) == -1) {
 452                 status = map_nt_error_from_unix(errno);
 453                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 454                          "current working directory to %s. Error "
 455                          "was %s\n", fname, strerror(errno) ));
 456                 goto chdir;
 457         }
 458
 459         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 460                                             &smb_fname_cwd);
 461         if (!NT_STATUS_IS_OK(status)) {
 462                 return status;
 463         }
 464
 465         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 466         if (ret == -1) {
 467                 status = map_nt_error_from_unix(errno);
 468                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 469                          "directory '.' (%s) Error was %s\n",
 470                          fname, strerror(errno)));
 471                 goto chdir;
 472         }
 473
 474         /* Ensure we're pointing at the same place. */
 475         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 476             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 477                 DEBUG(0,("change_dir_owner_to_parent: "
 478                          "device/inode on directory %s changed. "
 479                          "Refusing to chown !\n", fname ));
 480                 status = NT_STATUS_ACCESS_DENIED;
 481                 goto chdir;
 482         }
 483
 484         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 485                 /* Already this uid - no need to change. */
 486                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 487                         "is already owned by uid %d\n",
 488                         fname,
 489                         (int)smb_fname_cwd->st.st_ex_uid ));
 490                 status = NT_STATUS_OK;
 491                 goto chdir;
 492         }
 493
 494         become_root();
 495         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 496                             (gid_t)-1);
 497         unbecome_root();
 498         if (ret == -1) {
 499                 status = map_nt_error_from_unix(errno);
 500                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 501                           "directory %s to parent directory uid %u. "
 502                           "Error was %s\n", fname,
 503                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 504                           strerror(errno) ));
 505         } else {
 506                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 507                         "directory %s to parent directory uid %u.\n",
 508                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 509                 /* Ensure the uid entry is updated. */
 510                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 511         }
 512
 513  chdir:
 514         vfs_ChDir(conn,saved_dir);
 515  out:
 516         TALLOC_FREE(smb_fname_parent);
 517         TALLOC_FREE(smb_fname_cwd);
 518         return status;
 519 }
 520
 521 /****************************************************************************
 522  Open a file.
 523 ****************************************************************************/
 524
 525 static NTSTATUS open_file(files_struct *fsp,
 526                           connection_struct *conn,
 527                           struct smb_request *req,
 528                           const char *parent_dir,
 529                           int flags,
 530                           mode_t unx_mode,
 531                           uint32 access_mask, /* client requested access mask. */
 532                           uint32 open_access_mask) /* what we're actually using in the open. */
 533 {
 534         struct smb_filename *smb_fname = fsp->fsp_name;
 535         NTSTATUS status = NT_STATUS_OK;
 536         int accmode = (flags & O_ACCMODE);
 537         int local_flags = flags;
 538         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 539         bool file_created = false;
 540
 541         fsp->fh->fd = -1;
 542         errno = EPERM;
 543
 544         /* Check permissions */
 545
 546         /*
 547          * This code was changed after seeing a client open request
 548          * containing the open mode of (DENY_WRITE/read-only) with
 549          * the 'create if not exist' bit set. The previous code
 550          * would fail to open the file read only on a read-only share
 551          * as it was checking the flags parameter  directly against O_RDONLY,
 552          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 553          * JRA.
 554          */
 555
 556         if (!CAN_WRITE(conn)) {
 557                 /* It's a read-only share - fail if we wanted to write. */
 558                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 559                         DEBUG(3,("Permission denied opening %s\n",
 560                                  smb_fname_str_dbg(smb_fname)));
 561                         return NT_STATUS_ACCESS_DENIED;
 562                 } else if(flags & O_CREAT) {
 563                         /* We don't want to write - but we must make sure that
 564                            O_CREAT doesn't create the file if we have write
 565                            access into the directory.
 566                         */
 567                         flags &= ~(O_CREAT|O_EXCL);
 568                         local_flags &= ~(O_CREAT|O_EXCL);
 569                 }
 570         }
 571
 572         /*
 573          * This little piece of insanity is inspired by the
 574          * fact that an NT client can open a file for O_RDONLY,
 575          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 576          * If the client *can* write to the file, then it expects to
 577          * truncate the file, even though it is opening for readonly.
 578          * Quicken uses this stupid trick in backup file creation...
 579          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 580          * for helping track this one down. It didn't bite us in 2.0.x
 581          * as we always opened files read-write in that release. JRA.
 582          */
 583
 584         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 585                 DEBUG(10,("open_file: truncate requested on read-only open "
 586                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 587                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 588         }
 589
 590         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 591             (!file_existed && (local_flags & O_CREAT)) ||
 592             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 593                 const char *wild;
 594
 595                 /*
 596                  * We can't actually truncate here as the file may be locked.
 597                  * open_file_ntcreate will take care of the truncate later. JRA.
 598                  */
 599
 600                 local_flags &= ~O_TRUNC;
 601
 602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 603                 /*
 604                  * We would block on opening a FIFO with no one else on the
 605                  * other end. Do what we used to do and add O_NONBLOCK to the
 606                  * open flags. JRA.
 607                  */
 608
 609                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 610                         local_flags |= O_NONBLOCK;
 611                 }
 612 #endif
 613
 614                 /* Don't create files with Microsoft wildcard characters. */
 615                 if (fsp->base_fsp) {
 616                         /*
 617                          * wildcard characters are allowed in stream names
 618                          * only test the basefilename
 619                          */
 620                         wild = fsp->base_fsp->fsp_name->base_name;
 621                 } else {
 622                         wild = smb_fname->base_name;
 623                 }
 624                 if ((local_flags & O_CREAT) && !file_existed &&
 625                     ms_has_wild(wild))  {
 626                         return NT_STATUS_OBJECT_NAME_INVALID;
 627                 }
 628
 629                 /* Can we access this file ? */
 630                 if (!fsp->base_fsp) {
 631                         /* Only do this check on non-stream open. */
 632                         if (file_existed) {
 633                                 status = smbd_check_access_rights(conn,
 634                                                 smb_fname,
 635                                                 access_mask);
 636                         } else if (local_flags & O_CREAT){
 637                                 status = check_parent_access(conn,
 638                                                 smb_fname,
 639                                                 SEC_DIR_ADD_FILE,
 640                                                 NULL);
 641                         } else {
 642                                 /* File didn't exist and no O_CREAT. */
 643                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 644                         }
 645                         if (!NT_STATUS_IS_OK(status)) {
 646                                 DEBUG(10,("open_file: "
 647                                         "%s on file "
 648                                         "%s returned %s\n",
 649                                         file_existed ?
 650                                                 "smbd_check_access_rights" :
 651                                                 "check_parent_access",
 652                                         smb_fname_str_dbg(smb_fname),
 653                                         nt_errstr(status) ));
 654                                 return status;
 655                         }
 656                 }
 657
 658                 /* Actually do the open */
 659                 status = fd_open(conn, fsp, local_flags, unx_mode);
 660                 if (!NT_STATUS_IS_OK(status)) {
 661                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 662                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 663                                  nt_errstr(status),local_flags,flags));
 664                         return status;
 665                 }
 666
 667                 if ((local_flags & O_CREAT) && !file_existed) {
 668                         file_created = true;
 669                 }
 670
 671         } else {
 672                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 673                 if (!file_existed) {
 674                         /* File must exist for a stat open. */
 675                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 676                 }
 677
 678                 status = smbd_check_access_rights(conn,
 679                                 smb_fname,
 680                                 access_mask);
 681
 682                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 683                                 fsp->posix_open &&
 684                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 685                         /* This is a POSIX stat open for delete
 686                          * or rename on a symlink that points
 687                          * nowhere. Allow. */
 688                         DEBUG(10,("open_file: allowing POSIX "
 689                                   "open on bad symlink %s\n",
 690                                   smb_fname_str_dbg(smb_fname)));
 691                         status = NT_STATUS_OK;
 692                 }
 693
 694                 if (!NT_STATUS_IS_OK(status)) {
 695                         DEBUG(10,("open_file: "
 696                                 "smbd_check_access_rights on file "
 697                                 "%s returned %s\n",
 698                                 smb_fname_str_dbg(smb_fname),
 699                                 nt_errstr(status) ));
 700                         return status;
 701                 }
 702         }
 703
 704         if (!file_existed) {
 705                 int ret;
 706
 707                 if (fsp->fh->fd == -1) {
 708                         ret = SMB_VFS_STAT(conn, smb_fname);
 709                 } else {
 710                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 711                         /* If we have an fd, this stat should succeed. */
 712                         if (ret == -1) {
 713                                 DEBUG(0,("Error doing fstat on open file %s "
 714                                          "(%s)\n",
 715                                          smb_fname_str_dbg(smb_fname),
 716                                          strerror(errno) ));
 717                         }
 718                 }
 719
 720                 /* For a non-io open, this stat failing means file not found. JRA */
 721                 if (ret == -1) {
 722                         status = map_nt_error_from_unix(errno);
 723                         fd_close(fsp);
 724                         return status;
 725                 }
 726
 727                 if (file_created) {
 728                         bool need_re_stat = false;
 729                         /* Do all inheritance work after we've
 730                            done a successful stat call and filled
 731                            in the stat struct in fsp->fsp_name. */
 732
 733                         /* Inherit the ACL if required */
 734                         if (lp_inherit_perms(SNUM(conn))) {
 735                                 inherit_access_posix_acl(conn, parent_dir,
 736                                                          smb_fname->base_name,
 737                                                          unx_mode);
 738                                 need_re_stat = true;
 739                         }
 740
 741                         /* Change the owner if required. */
 742                         if (lp_inherit_owner(SNUM(conn))) {
 743                                 change_file_owner_to_parent(conn, parent_dir,
 744                                                             fsp);
 745                                 need_re_stat = true;
 746                         }
 747
 748                         if (need_re_stat) {
 749                                 if (fsp->fh->fd == -1) {
 750                                         ret = SMB_VFS_STAT(conn, smb_fname);
 751                                 } else {
 752                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 753                                         /* If we have an fd, this stat should succeed. */
 754                                         if (ret == -1) {
 755                                                 DEBUG(0,("Error doing fstat on open file %s "
 756                                                          "(%s)\n",
 757                                                          smb_fname_str_dbg(smb_fname),
 758                                                          strerror(errno) ));
 759                                         }
 760                                 }
 761                         }
 762
 763                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 764                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 765                                      smb_fname->base_name);
 766                 }
 767         }
 768
 769         /*
 770          * POSIX allows read-only opens of directories. We don't
 771          * want to do this (we use a different code path for this)
 772          * so catch a directory open and return an EISDIR. JRA.
 773          */
 774
 775         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 776                 fd_close(fsp);
 777                 errno = EISDIR;
 778                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 779         }
 780
 781         fsp->mode = smb_fname->st.st_ex_mode;
 782         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 783         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 784         fsp->file_pid = req ? req->smbpid : 0;
 785         fsp->can_lock = True;
 786         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 787         if (!CAN_WRITE(conn)) {
 788                 fsp->can_write = False;
 789         } else {
 790                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 791                         True : False;
 792         }
 793         fsp->print_file = NULL;
 794         fsp->modified = False;
 795         fsp->sent_oplock_break = NO_BREAK_SENT;
 796         fsp->is_directory = False;
 797         if (conn->aio_write_behind_list &&
 798             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 799                        conn->case_sensitive)) {
 800                 fsp->aio_write_behind = True;
 801         }
 802
 803         fsp->wcp = NULL; /* Write cache pointer. */
 804
 805         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 806                  conn->session_info->unix_info->unix_name,
 807                  smb_fname_str_dbg(smb_fname),
 808                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 809                  conn->num_files_open));
 810
 811         errno = 0;
 812         return NT_STATUS_OK;
 813 }
 814
 815 /****************************************************************************
 816  Check if we can open a file with a share mode.
 817  Returns True if conflict, False if not.
 818 ****************************************************************************/
 819
 820 static bool share_conflict(struct share_mode_entry *entry,
 821                            uint32 access_mask,
 822                            uint32 share_access)
 823 {
 824         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 825                   "entry->share_access = 0x%x, "
 826                   "entry->private_options = 0x%x\n",
 827                   (unsigned int)entry->access_mask,
 828                   (unsigned int)entry->share_access,
 829                   (unsigned int)entry->private_options));
 830
 831         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 832                   (unsigned int)access_mask, (unsigned int)share_access));
 833
 834         if ((entry->access_mask & (FILE_WRITE_DATA|
 835                                    FILE_APPEND_DATA|
 836                                    FILE_READ_DATA|
 837                                    FILE_EXECUTE|
 838                                    DELETE_ACCESS)) == 0) {
 839                 DEBUG(10,("share_conflict: No conflict due to "
 840                           "entry->access_mask = 0x%x\n",
 841                           (unsigned int)entry->access_mask ));
 842                 return False;
 843         }
 844
 845         if ((access_mask & (FILE_WRITE_DATA|
 846                             FILE_APPEND_DATA|
 847                             FILE_READ_DATA|
 848                             FILE_EXECUTE|
 849                             DELETE_ACCESS)) == 0) {
 850                 DEBUG(10,("share_conflict: No conflict due to "
 851                           "access_mask = 0x%x\n",
 852                           (unsigned int)access_mask ));
 853                 return False;
 854         }
 855
 856 #if 1 /* JRA TEST - Superdebug. */
 857 #define CHECK_MASK(num, am, right, sa, share) \
 858         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 859                 (unsigned int)(num), (unsigned int)(am), \
 860                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 861         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 862                 (unsigned int)(num), (unsigned int)(sa), \
 863                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 864         if (((am) & (right)) && !((sa) & (share))) { \
 865                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 867                         (unsigned int)(share) )); \
 868                 return True; \
 869         }
 870 #else
 871 #define CHECK_MASK(num, am, right, sa, share) \
 872         if (((am) & (right)) && !((sa) & (share))) { \
 873                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 875                         (unsigned int)(share) )); \
 876                 return True; \
 877         }
 878 #endif
 879
 880         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 881                    share_access, FILE_SHARE_WRITE);
 882         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 883                    entry->share_access, FILE_SHARE_WRITE);
 884
 885         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 886                    share_access, FILE_SHARE_READ);
 887         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 888                    entry->share_access, FILE_SHARE_READ);
 889
 890         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 891                    share_access, FILE_SHARE_DELETE);
 892         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 893                    entry->share_access, FILE_SHARE_DELETE);
 894
 895         DEBUG(10,("share_conflict: No conflict.\n"));
 896         return False;
 897 }
 898
 899 #if defined(DEVELOPER)
 900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 901                                       int num,
 902                                       struct share_mode_entry *share_entry)
 903 {
 904         files_struct *fsp;
 905
 906         if (!procid_is_me(&share_entry->pid)) {
 907                 return;
 908         }
 909
 910         if (is_deferred_open_entry(share_entry) &&
 911             !open_was_deferred(sconn, share_entry->op_mid)) {
 912                 char *str = talloc_asprintf(talloc_tos(),
 913                         "Got a deferred entry without a request: "
 914                         "PANIC: %s\n",
 915                         share_mode_str(talloc_tos(), num, share_entry));
 916                 smb_panic(str);
 917         }
 918
 919         if (!is_valid_share_mode_entry(share_entry)) {
 920                 return;
 921         }
 922
 923         fsp = file_find_dif(sconn, share_entry->id,
 924                             share_entry->share_file_id);
 925         if (!fsp) {
 926                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 927                          share_mode_str(talloc_tos(), num, share_entry) ));
 928                 smb_panic("validate_my_share_entries: Cannot match a "
 929                           "share entry with an open file\n");
 930         }
 931
 932         if (is_deferred_open_entry(share_entry)) {
 933                 goto panic;
 934         }
 935
 936         if ((share_entry->op_type == NO_OPLOCK) &&
 937             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 938                 /* Someone has already written to it, but I haven't yet
 939                  * noticed */
 940                 return;
 941         }
 942
 943         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 944                 goto panic;
 945         }
 946
 947         return;
 948
 949  panic:
 950         {
 951                 char *str;
 952                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 953                          share_mode_str(talloc_tos(), num, share_entry) ));
 954                 str = talloc_asprintf(talloc_tos(),
 955                         "validate_my_share_entries: "
 956                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 957                          fsp->fsp_name->base_name,
 958                          (unsigned int)fsp->oplock_type,
 959                          (unsigned int)share_entry->op_type );
 960                 smb_panic(str);
 961         }
 962 }
 963 #endif
 964
 965 bool is_stat_open(uint32 access_mask)
 966 {
 967         return (access_mask &&
 968                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 969                                   FILE_WRITE_ATTRIBUTES))==0) &&
 970                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 971                                  FILE_WRITE_ATTRIBUTES)) != 0));
 972 }
 973
 974 /****************************************************************************
 975  Deal with share modes
 976  Invarient: Share mode must be locked on entry and exit.
 977  Returns -1 on error, or number of share modes on success (may be zero).
 978 ****************************************************************************/
 979
 980 static NTSTATUS open_mode_check(connection_struct *conn,
 981                                 struct share_mode_lock *lck,
 982                                 uint32_t name_hash,
 983                                 uint32 access_mask,
 984                                 uint32 share_access,
 985                                 uint32 create_options,
 986                                 bool *file_existed)
 987 {
 988         int i;
 989
 990         if(lck->num_share_modes == 0) {
 991                 return NT_STATUS_OK;
 992         }
 993
 994         *file_existed = True;
 995
 996         /* A delete on close prohibits everything */
 997
 998         if (is_delete_on_close_set(lck, name_hash)) {
 999                 return NT_STATUS_DELETE_PENDING;
1000         }
1001
1002         if (is_stat_open(access_mask)) {
1003                 /* Stat open that doesn't trigger oplock breaks or share mode
1004                  * checks... ! JRA. */
1005                 return NT_STATUS_OK;
1006         }
1007
1008         /*
1009          * Check if the share modes will give us access.
1010          */
1011
1012 #if defined(DEVELOPER)
1013         for(i = 0; i < lck->num_share_modes; i++) {
1014                 validate_my_share_entries(conn->sconn, i,
1015                                           &lck->share_modes[i]);
1016         }
1017 #endif
1018
1019         if (!lp_share_modes(SNUM(conn))) {
1020                 return NT_STATUS_OK;
1021         }
1022
1023         /* Now we check the share modes, after any oplock breaks. */
1024         for(i = 0; i < lck->num_share_modes; i++) {
1025
1026                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1027                         continue;
1028                 }
1029
1030                 /* someone else has a share lock on it, check to see if we can
1031                  * too */
1032                 if (share_conflict(&lck->share_modes[i],
1033                                    access_mask, share_access)) {
1034                         return NT_STATUS_SHARING_VIOLATION;
1035                 }
1036         }
1037
1038         return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042         return ((fsp->access_mask == DELETE_ACCESS) &&
1043                 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047  * Send a break message to the oplock holder and delay the open for
1048  * our client.
1049  */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052                                         struct share_mode_entry *exclusive,
1053                                         uint64_t mid,
1054                                         int oplock_request)
1055 {
1056         NTSTATUS status;
1057         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059         DEBUG(10, ("Sending break request to PID %s\n",
1060                    procid_str_static(&exclusive->pid)));
1061         exclusive->op_mid = mid;
1062
1063         /* Create the message. */
1064         share_mode_entry_to_message(msg, exclusive);
1065
1066         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067            don't want this set in the share mode struct pointed to by lck. */
1068
1069         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072         }
1073
1074         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075                                     MSG_SMB_BREAK_REQUEST,
1076                                     (uint8 *)msg,
1077                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078         if (!NT_STATUS_IS_OK(status)) {
1079                 DEBUG(3, ("Could not send oplock break message: %s\n",
1080                           nt_errstr(status)));
1081         }
1082
1083         return status;
1084 }
1085
1086 /*
1087  * Return share_mode_entry pointers for :
1088  * 1). Batch oplock entry.
1089  * 2). Batch or exclusive oplock entry (may be identical to #1).
1090  * bool have_level2_oplock
1091  * bool have_no_oplock.
1092  * Do internal consistency checks on the share mode for a file.
1093  */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096                                 int oplock_request,
1097                                 const struct share_mode_lock *lck,
1098                                 struct share_mode_entry **pp_batch,
1099                                 struct share_mode_entry **pp_ex_or_batch,
1100                                 bool *got_level2,
1101                                 bool *got_no_oplock)
1102 {
1103         int i;
1104
1105         *pp_batch = NULL;
1106         *pp_ex_or_batch = NULL;
1107         *got_level2 = false;
1108         *got_no_oplock = false;
1109
1110         /* Ignore stat or internal opens, as is done in
1111                 delay_for_batch_oplocks() and
1112                 delay_for_exclusive_oplocks().
1113          */
1114         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115                 return;
1116         }
1117
1118         for (i=0; i<lck->num_share_modes; i++) {
1119                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1120                         continue;
1121                 }
1122
1123                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1124                                 is_stat_open(lck->share_modes[i].access_mask)) {
1125                         /* We ignore stat opens in the table - they
1126                            always have NO_OPLOCK and never get or
1127                            cause breaks. JRA. */
1128                         continue;
1129                 }
1130
1131                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1132                         /* batch - can only be one. */
1133                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134                                 smb_panic("Bad batch oplock entry.");
1135                         }
1136                         *pp_batch = &lck->share_modes[i];
1137                 }
1138
1139                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1140                         /* Exclusive or batch - can only be one. */
1141                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142                                 smb_panic("Bad exclusive or batch oplock entry.");
1143                         }
1144                         *pp_ex_or_batch = &lck->share_modes[i];
1145                 }
1146
1147                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1148                         if (*pp_batch || *pp_ex_or_batch) {
1149                                 smb_panic("Bad levelII oplock entry.");
1150                         }
1151                         *got_level2 = true;
1152                 }
1153
1154                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1155                         if (*pp_batch || *pp_ex_or_batch) {
1156                                 smb_panic("Bad no oplock entry.");
1157                         }
1158                         *got_no_oplock = true;
1159                 }
1160         }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164                                         uint64_t mid,
1165                                         int oplock_request,
1166                                         struct share_mode_entry *batch_entry)
1167 {
1168         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169                 return false;
1170         }
1171         if (batch_entry == NULL) {
1172                 return false;
1173         }
1174
1175         /* Found a batch oplock */
1176         send_break_message(fsp, batch_entry, mid, oplock_request);
1177         return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181                                         uint64_t mid,
1182                                         int oplock_request,
1183                                         struct share_mode_entry *ex_entry)
1184 {
1185         bool delay_it;
1186
1187         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188                 return false;
1189         }
1190         if (ex_entry == NULL) {
1191                 return false;
1192         }
1193
1194         /* Found an exclusive or batch oplock */
1195
1196         delay_it = is_delete_request(fsp) ?
1197                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199         if (!delay_it) {
1200                 return false;
1201         }
1202
1203         send_break_message(fsp, ex_entry, mid, oplock_request);
1204         return true;
1205 }
1206
1207 static void grant_fsp_oplock_type(files_struct *fsp,
1208                                 const struct byte_range_lock *br_lck,
1209                                 int oplock_request,
1210                                 bool got_level2_oplock,
1211                                 bool got_a_none_oplock)
1212 {
1213         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1214                             lp_level2_oplocks(SNUM(fsp->conn));
1215
1216         /* Start by granting what the client asked for,
1217            but ensure no SAMBA_PRIVATE bits can be set. */
1218         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1219
1220         if (oplock_request & INTERNAL_OPEN_ONLY) {
1221                 /* No oplocks on internal open. */
1222                 fsp->oplock_type = NO_OPLOCK;
1223                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1224                         fsp->oplock_type, fsp_str_dbg(fsp)));
1225                 return;
1226         } else if (br_lck && br_lck->num_locks > 0) {
1227                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1228                         fsp_str_dbg(fsp)));
1229                 fsp->oplock_type = NO_OPLOCK;
1230         }
1231
1232         if (is_stat_open(fsp->access_mask)) {
1233                 /* Leave the value already set. */
1234                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1235                         fsp->oplock_type, fsp_str_dbg(fsp)));
1236                 return;
1237         }
1238
1239         /*
1240          * Match what was requested (fsp->oplock_type) with
1241          * what was found in the existing share modes.
1242          */
1243
1244         if (got_a_none_oplock) {
1245                 fsp->oplock_type = NO_OPLOCK;
1246         } else if (got_level2_oplock) {
1247                 if (fsp->oplock_type == NO_OPLOCK ||
1248                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1249                         /* Store a level2 oplock, but don't tell the client */
1250                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251                 } else {
1252                         fsp->oplock_type = LEVEL_II_OPLOCK;
1253                 }
1254         } else {
1255                 /* All share_mode_entries are placeholders or deferred.
1256                  * Silently upgrade to fake levelII if the client didn't
1257                  * ask for an oplock. */
1258                 if (fsp->oplock_type == NO_OPLOCK) {
1259                         /* Store a level2 oplock, but don't tell the client */
1260                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261                 }
1262         }
1263
1264         /*
1265          * Don't grant level2 to clients that don't want them
1266          * or if we've turned them off.
1267          */
1268         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1269                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270         }
1271
1272         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1273                   fsp->oplock_type, fsp_str_dbg(fsp)));
1274 }
1275
1276 bool request_timed_out(struct timeval request_time,
1277                        struct timeval timeout)
1278 {
1279         struct timeval now, end_time;
1280         GetTimeOfDay(&now);
1281         end_time = timeval_sum(&request_time, &timeout);
1282         return (timeval_compare(&end_time, &now) < 0);
1283 }
1284
1285 /****************************************************************************
1286  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1287 ****************************************************************************/
1288
1289 static void defer_open(struct share_mode_lock *lck,
1290                        struct timeval request_time,
1291                        struct timeval timeout,
1292                        struct smb_request *req,
1293                        struct deferred_open_record *state)
1294 {
1295         int i;
1296
1297         /* Paranoia check */
1298
1299         for (i=0; i<lck->num_share_modes; i++) {
1300                 struct share_mode_entry *e = &lck->share_modes[i];
1301
1302                 if (is_deferred_open_entry(e) &&
1303                     procid_is_me(&e->pid) &&
1304                     (e->op_mid == req->mid)) {
1305                         DEBUG(0, ("Trying to defer an already deferred "
1306                                 "request: mid=%llu, exiting\n",
1307                                 (unsigned long long)req->mid));
1308                         exit_server("attempt to defer a deferred request");
1309                 }
1310         }
1311
1312         /* End paranoia check */
1313
1314         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1315                   "open entry for mid %llu\n",
1316                   (unsigned int)request_time.tv_sec,
1317                   (unsigned int)request_time.tv_usec,
1318                   (unsigned long long)req->mid));
1319
1320         if (!push_deferred_open_message_smb(req, request_time, timeout,
1321                                        state->id, (char *)state, sizeof(*state))) {
1322                 exit_server("push_deferred_open_message_smb failed");
1323         }
1324         add_deferred_open(lck, req->mid, request_time,
1325                           messaging_server_id(req->sconn->msg_ctx), state->id);
1326 }
1327
1328
1329 /****************************************************************************
1330  On overwrite open ensure that the attributes match.
1331 ****************************************************************************/
1332
1333 bool open_match_attributes(connection_struct *conn,
1334                            uint32 old_dos_attr,
1335                            uint32 new_dos_attr,
1336                            mode_t existing_unx_mode,
1337                            mode_t new_unx_mode,
1338                            mode_t *returned_unx_mode)
1339 {
1340         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1341
1342         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1343         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1344
1345         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1346            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1347                 *returned_unx_mode = new_unx_mode;
1348         } else {
1349                 *returned_unx_mode = (mode_t)0;
1350         }
1351
1352         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1353                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1354                   "returned_unx_mode = 0%o\n",
1355                   (unsigned int)old_dos_attr,
1356                   (unsigned int)existing_unx_mode,
1357                   (unsigned int)new_dos_attr,
1358                   (unsigned int)*returned_unx_mode ));
1359
1360         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1361         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1362                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1363                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1364                         return False;
1365                 }
1366         }
1367         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1368                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1369                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1370                         return False;
1371                 }
1372         }
1373         return True;
1374 }
1375
1376 /****************************************************************************
1377  Special FCB or DOS processing in the case of a sharing violation.
1378  Try and find a duplicated file handle.
1379 ****************************************************************************/
1380
1381 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1382                                      connection_struct *conn,
1383                                      files_struct *fsp_to_dup_into,
1384                                      const struct smb_filename *smb_fname,
1385                                      struct file_id id,
1386                                      uint16 file_pid,
1387                                      uint16 vuid,
1388                                      uint32 access_mask,
1389                                      uint32 share_access,
1390                                      uint32 create_options)
1391 {
1392         files_struct *fsp;
1393
1394         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1395                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1396
1397         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1398             fsp = file_find_di_next(fsp)) {
1399
1400                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1401                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1402                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1403                           fsp->fh->fd, (unsigned int)fsp->vuid,
1404                           (unsigned int)fsp->file_pid,
1405                           (unsigned int)fsp->fh->private_options,
1406                           (unsigned int)fsp->access_mask ));
1407
1408                 if (fsp->fh->fd != -1 &&
1409                     fsp->vuid == vuid &&
1410                     fsp->file_pid == file_pid &&
1411                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1412                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1413                     (fsp->access_mask & FILE_WRITE_DATA) &&
1414                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1415                     strequal(fsp->fsp_name->stream_name,
1416                              smb_fname->stream_name)) {
1417                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1418                         break;
1419                 }
1420         }
1421
1422         if (!fsp) {
1423                 return NT_STATUS_NOT_FOUND;
1424         }
1425
1426         /* quite an insane set of semantics ... */
1427         if (is_executable(smb_fname->base_name) &&
1428             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1429                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1430                 return NT_STATUS_INVALID_PARAMETER;
1431         }
1432
1433         /* We need to duplicate this fsp. */
1434         return dup_file_fsp(req, fsp, access_mask, share_access,
1435                             create_options, fsp_to_dup_into);
1436 }
1437
1438 static void schedule_defer_open(struct share_mode_lock *lck,
1439                                 struct timeval request_time,
1440                                 struct smb_request *req)
1441 {
1442         struct deferred_open_record state;
1443
1444         /* This is a relative time, added to the absolute
1445            request_time value to get the absolute timeout time.
1446            Note that if this is the second or greater time we enter
1447            this codepath for this particular request mid then
1448            request_time is left as the absolute time of the *first*
1449            time this request mid was processed. This is what allows
1450            the request to eventually time out. */
1451
1452         struct timeval timeout;
1453
1454         /* Normally the smbd we asked should respond within
1455          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1456          * the client did, give twice the timeout as a safety
1457          * measure here in case the other smbd is stuck
1458          * somewhere else. */
1459
1460         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1461
1462         /* Nothing actually uses state.delayed_for_oplocks
1463            but it's handy to differentiate in debug messages
1464            between a 30 second delay due to oplock break, and
1465            a 1 second delay for share mode conflicts. */
1466
1467         state.delayed_for_oplocks = True;
1468         state.id = lck->id;
1469
1470         if (!request_timed_out(request_time, timeout)) {
1471                 defer_open(lck, request_time, timeout, req, &state);
1472         }
1473 }
1474
1475 /****************************************************************************
1476  Work out what access_mask to use from what the client sent us.
1477 ****************************************************************************/
1478
1479 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1480                                     const struct smb_filename *smb_fname,
1481                                     bool file_existed,
1482                                     uint32_t access_mask,
1483                                     uint32_t *access_mask_out)
1484 {
1485         NTSTATUS status;
1486         uint32_t orig_access_mask = access_mask;
1487         uint32_t rejected_share_access;
1488
1489         /*
1490          * Convert GENERIC bits to specific bits.
1491          */
1492
1493         se_map_generic(&access_mask, &file_generic_mapping);
1494
1495         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1496         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1497                 if (get_current_uid(conn) == (uid_t)0) {
1498                         access_mask  |= FILE_GENERIC_ALL;
1499                 } else if (file_existed) {
1500
1501                         struct security_descriptor *sd;
1502                         uint32_t access_granted = 0;
1503
1504                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1505                                         (SECINFO_OWNER |
1506                                         SECINFO_GROUP |
1507                                         SECINFO_DACL),&sd);
1508
1509                         if (!NT_STATUS_IS_OK(status)) {
1510                                 DEBUG(10,("smbd_calculate_access_mask: "
1511                                         "Could not get acl on file %s: %s\n",
1512                                         smb_fname_str_dbg(smb_fname),
1513                                         nt_errstr(status)));
1514                                 return NT_STATUS_ACCESS_DENIED;
1515                         }
1516
1517                         /*
1518                          * Never test FILE_READ_ATTRIBUTES. se_access_check()
1519                          * also takes care of owner WRITE_DAC and READ_CONTROL.
1520                          */
1521                         status = se_access_check(sd,
1522                                         get_current_nttok(conn),
1523                                         (access_mask & ~FILE_READ_ATTRIBUTES),
1524                                         &access_granted);
1525
1526                         TALLOC_FREE(sd);
1527
1528                         if (!NT_STATUS_IS_OK(status)) {
1529                                 DEBUG(10, ("smbd_calculate_access_mask: "
1530                                         "Access denied on file %s: "
1531                                         "when calculating maximum access\n",
1532                                         smb_fname_str_dbg(smb_fname)));
1533                                 return NT_STATUS_ACCESS_DENIED;
1534                         }
1535
1536                         access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1537                 } else {
1538                         access_mask = FILE_GENERIC_ALL;
1539                 }
1540
1541                 access_mask &= conn->share_access;
1542         }
1543
1544         rejected_share_access = access_mask & ~(conn->share_access);
1545
1546         if (rejected_share_access) {
1547                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1548                         "file %s: rejected by share access mask[0x%08X] "
1549                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1550                         smb_fname_str_dbg(smb_fname),
1551                         conn->share_access,
1552                         orig_access_mask, access_mask,
1553                         rejected_share_access));
1554                 return NT_STATUS_ACCESS_DENIED;
1555         }
1556
1557         *access_mask_out = access_mask;
1558         return NT_STATUS_OK;
1559 }
1560
1561 /****************************************************************************
1562  Remove the deferred open entry under lock.
1563 ****************************************************************************/
1564
1565 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1566                                 struct server_id pid)
1567 {
1568         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1569                         NULL, NULL, NULL);
1570         if (lck == NULL) {
1571                 DEBUG(0, ("could not get share mode lock\n"));
1572                 return;
1573         }
1574         del_deferred_open_entry(lck, mid, pid);
1575         TALLOC_FREE(lck);
1576 }
1577
1578 /****************************************************************
1579  Ensure we get the brlock lock followed by the share mode lock
1580  in the correct order to prevent deadlocks if other smbd's are
1581  using the brlock database on this file simultaneously with this open
1582  (that code also gets the locks in brlock -> share mode lock order).
1583 ****************************************************************/
1584
1585 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1586                                 files_struct *fsp,
1587                                 const struct file_id id,
1588                                 const char *connectpath,
1589                                 const struct smb_filename *smb_fname,
1590                                 const struct timespec *p_old_write_time,
1591                                 struct share_mode_lock **p_lck,
1592                                 struct byte_range_lock **p_br_lck)
1593 {
1594         /* Ordering - we must get the br_lck for this
1595            file before the share mode. */
1596         if (lp_locking(fsp->conn->params)) {
1597                 *p_br_lck = brl_get_locks_readonly(fsp);
1598                 if (*p_br_lck == NULL) {
1599                         DEBUG(0, ("Could not get br_lock\n"));
1600                         return false;
1601                 }
1602                 /* Note - we don't need to free the returned
1603                    br_lck explicitly as it was allocated on talloc_tos()
1604                    and so will be autofreed (and release the lock)
1605                    once the frame context disappears.
1606
1607                    If it was set to fsp->brlock_rec then it was
1608                    talloc_move'd to hang off the fsp pointer and
1609                    in this case is guarenteed to not be holding the
1610                    lock on the brlock database. */
1611         }
1612
1613         *p_lck = get_share_mode_lock(mem_ctx,
1614                                 id,
1615                                 connectpath,
1616                                 smb_fname,
1617                                 p_old_write_time);
1618
1619         if (*p_lck == NULL) {
1620                 DEBUG(0, ("Could not get share mode lock\n"));
1621                 TALLOC_FREE(*p_br_lck);
1622                 return false;
1623         }
1624         return true;
1625 }
1626
1627 /****************************************************************************
1628  Open a file with a share mode. Passed in an already created files_struct *.
1629 ****************************************************************************/
1630
1631 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1632                             struct smb_request *req,
1633                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1634                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1635                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1636                             uint32 create_options,      /* options such as delete on close. */
1637                             uint32 new_dos_attributes,  /* attributes used for new file. */
1638                             int oplock_request,         /* internal Samba oplock codes. */
1639                                                         /* Information (FILE_EXISTS etc.) */
1640                             uint32_t private_flags,     /* Samba specific flags. */
1641                             int *pinfo,
1642                             files_struct *fsp)
1643 {
1644         struct smb_filename *smb_fname = fsp->fsp_name;
1645         int flags=0;
1646         int flags2=0;
1647         bool file_existed = VALID_STAT(smb_fname->st);
1648         bool def_acl = False;
1649         bool posix_open = False;
1650         bool new_file_created = False;
1651         bool clear_ads = false;
1652         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1653         mode_t new_unx_mode = (mode_t)0;
1654         mode_t unx_mode = (mode_t)0;
1655         int info;
1656         uint32 existing_dos_attributes = 0;
1657         struct timeval request_time = timeval_zero();
1658         struct share_mode_lock *lck = NULL;
1659         uint32 open_access_mask = access_mask;
1660         NTSTATUS status;
1661         char *parent_dir;
1662
1663         if (conn->printer) {
1664                 /*
1665                  * Printers are handled completely differently.
1666                  * Most of the passed parameters are ignored.
1667                  */
1668
1669                 if (pinfo) {
1670                         *pinfo = FILE_WAS_CREATED;
1671                 }
1672
1673                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1674                            smb_fname_str_dbg(smb_fname)));
1675
1676                 if (!req) {
1677                         DEBUG(0,("open_file_ntcreate: printer open without "
1678                                 "an SMB request!\n"));
1679                         return NT_STATUS_INTERNAL_ERROR;
1680                 }
1681
1682                 return print_spool_open(fsp, smb_fname->base_name,
1683                                         req->vuid);
1684         }
1685
1686         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1687                             NULL)) {
1688                 return NT_STATUS_NO_MEMORY;
1689         }
1690
1691         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1692                 posix_open = True;
1693                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1694                 new_dos_attributes = 0;
1695         } else {
1696                 /* Windows allows a new file to be created and
1697                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1698                    sent by the client. Do the same. */
1699
1700                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1701
1702                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1703                  * created new. */
1704                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1705                                      smb_fname, parent_dir);
1706         }
1707
1708         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1709                    "access_mask=0x%x share_access=0x%x "
1710                    "create_disposition = 0x%x create_options=0x%x "
1711                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1712                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1713                    access_mask, share_access, create_disposition,
1714                    create_options, (unsigned int)unx_mode, oplock_request,
1715                    (unsigned int)private_flags));
1716
1717         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1718                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1719                 return NT_STATUS_INTERNAL_ERROR;
1720         }
1721
1722         /*
1723          * Only non-internal opens can be deferred at all
1724          */
1725
1726         if (req) {
1727                 void *ptr;
1728                 if (get_deferred_open_message_state(req,
1729                                 &request_time,
1730                                 &ptr)) {
1731
1732                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1733                         /* Remember the absolute time of the original
1734                            request with this mid. We'll use it later to
1735                            see if this has timed out. */
1736
1737                         /* Remove the deferred open entry under lock. */
1738                         remove_deferred_open_entry(
1739                                 state->id, req->mid,
1740                                 messaging_server_id(req->sconn->msg_ctx));
1741
1742                         /* Ensure we don't reprocess this message. */
1743                         remove_deferred_open_message_smb(req->sconn, req->mid);
1744                 }
1745         }
1746
1747         if (!posix_open) {
1748                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1749                 if (file_existed) {
1750                         existing_dos_attributes = dos_mode(conn, smb_fname);
1751                 }
1752         }
1753
1754         /* ignore any oplock requests if oplocks are disabled */
1755         if (!lp_oplocks(SNUM(conn)) ||
1756             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1757                 /* Mask off everything except the private Samba bits. */
1758                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1759         }
1760
1761         /* this is for OS/2 long file names - say we don't support them */
1762         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1763                 /* OS/2 Workplace shell fix may be main code stream in a later
1764                  * release. */
1765                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1766                          "supported.\n"));
1767                 if (use_nt_status()) {
1768                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1769                 }
1770                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1771         }
1772
1773         switch( create_disposition ) {
1774                 /*
1775                  * Currently we're using FILE_SUPERSEDE as the same as
1776                  * FILE_OVERWRITE_IF but they really are
1777                  * different. FILE_SUPERSEDE deletes an existing file
1778                  * (requiring delete access) then recreates it.
1779                  */
1780                 case FILE_SUPERSEDE:
1781                         /* If file exists replace/overwrite. If file doesn't
1782                          * exist create. */
1783                         flags2 |= (O_CREAT | O_TRUNC);
1784                         clear_ads = true;
1785                         break;
1786
1787                 case FILE_OVERWRITE_IF:
1788                         /* If file exists replace/overwrite. If file doesn't
1789                          * exist create. */
1790                         flags2 |= (O_CREAT | O_TRUNC);
1791                         clear_ads = true;
1792                         break;
1793
1794                 case FILE_OPEN:
1795                         /* If file exists open. If file doesn't exist error. */
1796                         if (!file_existed) {
1797                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1798                                          "requested for file %s and file "
1799                                          "doesn't exist.\n",
1800                                          smb_fname_str_dbg(smb_fname)));
1801                                 errno = ENOENT;
1802                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1803                         }
1804                         break;
1805
1806                 case FILE_OVERWRITE:
1807                         /* If file exists overwrite. If file doesn't exist
1808                          * error. */
1809                         if (!file_existed) {
1810                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1811                                          "requested for file %s and file "
1812                                          "doesn't exist.\n",
1813                                          smb_fname_str_dbg(smb_fname) ));
1814                                 errno = ENOENT;
1815                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1816                         }
1817                         flags2 |= O_TRUNC;
1818                         clear_ads = true;
1819                         break;
1820
1821                 case FILE_CREATE:
1822                         /* If file exists error. If file doesn't exist
1823                          * create. */
1824                         if (file_existed) {
1825                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1826                                          "requested for file %s and file "
1827                                          "already exists.\n",
1828                                          smb_fname_str_dbg(smb_fname)));
1829                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1830                                         errno = EISDIR;
1831                                 } else {
1832                                         errno = EEXIST;
1833                                 }
1834                                 return map_nt_error_from_unix(errno);
1835                         }
1836                         flags2 |= (O_CREAT|O_EXCL);
1837                         break;
1838
1839                 case FILE_OPEN_IF:
1840                         /* If file exists open. If file doesn't exist
1841                          * create. */
1842                         flags2 |= O_CREAT;
1843                         break;
1844
1845                 default:
1846                         return NT_STATUS_INVALID_PARAMETER;
1847         }
1848
1849         /* We only care about matching attributes on file exists and
1850          * overwrite. */
1851
1852         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1853                              (create_disposition == FILE_OVERWRITE_IF))) {
1854                 if (!open_match_attributes(conn, existing_dos_attributes,
1855                                            new_dos_attributes,
1856                                            smb_fname->st.st_ex_mode,
1857                                            unx_mode, &new_unx_mode)) {
1858                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1859                                  "for file %s (%x %x) (0%o, 0%o)\n",
1860                                  smb_fname_str_dbg(smb_fname),
1861                                  existing_dos_attributes,
1862                                  new_dos_attributes,
1863                                  (unsigned int)smb_fname->st.st_ex_mode,
1864                                  (unsigned int)unx_mode ));
1865                         errno = EACCES;
1866                         return NT_STATUS_ACCESS_DENIED;
1867                 }
1868         }
1869
1870         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1871                                         access_mask,
1872                                         &access_mask);
1873         if (!NT_STATUS_IS_OK(status)) {
1874                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1875                         "on file %s returned %s\n",
1876                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1877                 return status;
1878         }
1879
1880         open_access_mask = access_mask;
1881
1882         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1883                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1884         }
1885
1886         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1887                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1888                     access_mask));
1889
1890         /*
1891          * Note that we ignore the append flag as append does not
1892          * mean the same thing under DOS and Unix.
1893          */
1894
1895         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1896                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1897                 /* DENY_DOS opens are always underlying read-write on the
1898                    file handle, no matter what the requested access mask
1899                     says. */
1900                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1901                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1902                         flags = O_RDWR;
1903                 } else {
1904                         flags = O_WRONLY;
1905                 }
1906         } else {
1907                 flags = O_RDONLY;
1908         }
1909
1910         /*
1911          * Currently we only look at FILE_WRITE_THROUGH for create options.
1912          */
1913
1914 #if defined(O_SYNC)
1915         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1916                 flags2 |= O_SYNC;
1917         }
1918 #endif /* O_SYNC */
1919
1920         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1921                 flags2 |= O_APPEND;
1922         }
1923
1924         if (!posix_open && !CAN_WRITE(conn)) {
1925                 /*
1926                  * We should really return a permission denied error if either
1927                  * O_CREAT or O_TRUNC are set, but for compatibility with
1928                  * older versions of Samba we just AND them out.
1929                  */
1930                 flags2 &= ~(O_CREAT|O_TRUNC);
1931         }
1932
1933         /*
1934          * Ensure we can't write on a read-only share or file.
1935          */
1936
1937         if (flags != O_RDONLY && file_existed &&
1938             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1939                 DEBUG(5,("open_file_ntcreate: write access requested for "
1940                          "file %s on read only %s\n",
1941                          smb_fname_str_dbg(smb_fname),
1942                          !CAN_WRITE(conn) ? "share" : "file" ));
1943                 errno = EACCES;
1944                 return NT_STATUS_ACCESS_DENIED;
1945         }
1946
1947         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1948         fsp->share_access = share_access;
1949         fsp->fh->private_options = private_flags;
1950         fsp->access_mask = open_access_mask; /* We change this to the
1951                                               * requested access_mask after
1952                                               * the open is done. */
1953         fsp->posix_open = posix_open;
1954
1955         /* Ensure no SAMBA_PRIVATE bits can be set. */
1956         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1957
1958         if (timeval_is_zero(&request_time)) {
1959                 request_time = fsp->open_time;
1960         }
1961
1962         if (file_existed) {
1963                 struct byte_range_lock *br_lck = NULL;
1964                 struct share_mode_entry *batch_entry = NULL;
1965                 struct share_mode_entry *exclusive_entry = NULL;
1966                 bool got_level2_oplock = false;
1967                 bool got_a_none_oplock = false;
1968                 struct file_id id;
1969
1970                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1971                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1972
1973                 if (!acquire_ordered_locks(talloc_tos(),
1974                                         fsp,
1975                                         id,
1976                                         conn->connectpath,
1977                                         smb_fname,
1978                                         &old_write_time,
1979                                         &lck,
1980                                         &br_lck)) {
1981                         return NT_STATUS_SHARING_VIOLATION;
1982                 }
1983
1984                 /* Get the types we need to examine. */
1985                 find_oplock_types(fsp,
1986                                 oplock_request,
1987                                 lck,
1988                                 &batch_entry,
1989                                 &exclusive_entry,
1990                                 &got_level2_oplock,
1991                                 &got_a_none_oplock);
1992
1993                 /* First pass - send break only on batch oplocks. */
1994                 if ((req != NULL) &&
1995                                 delay_for_batch_oplocks(fsp,
1996                                         req->mid,
1997                                         oplock_request,
1998                                         batch_entry)) {
1999                         schedule_defer_open(lck, request_time, req);
2000                         TALLOC_FREE(lck);
2001                         return NT_STATUS_SHARING_VIOLATION;
2002                 }
2003
2004                 /* Use the client requested access mask here, not the one we
2005                  * open with. */
2006                 status = open_mode_check(conn, lck, fsp->name_hash,
2007                                         access_mask, share_access,
2008                                          create_options, &file_existed);
2009
2010                 if (NT_STATUS_IS_OK(status)) {
2011                         /* We might be going to allow this open. Check oplock
2012                          * status again. */
2013                         /* Second pass - send break for both batch or
2014                          * exclusive oplocks. */
2015                         if ((req != NULL) &&
2016                                         delay_for_exclusive_oplocks(
2017                                                 fsp,
2018                                                 req->mid,
2019                                                 oplock_request,
2020                                                 exclusive_entry)) {
2021                                 schedule_defer_open(lck, request_time, req);
2022                                 TALLOC_FREE(lck);
2023                                 return NT_STATUS_SHARING_VIOLATION;
2024                         }
2025                 }
2026
2027                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2028                         /* DELETE_PENDING is not deferred for a second */
2029                         TALLOC_FREE(lck);
2030                         return status;
2031                 }
2032
2033                 grant_fsp_oplock_type(fsp,
2034                                 br_lck,
2035                                 oplock_request,
2036                                 got_level2_oplock,
2037                                 got_a_none_oplock);
2038
2039                 if (!NT_STATUS_IS_OK(status)) {
2040                         uint32 can_access_mask;
2041                         bool can_access = True;
2042
2043                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2044
2045                         /* Check if this can be done with the deny_dos and fcb
2046                          * calls. */
2047                         if (private_flags &
2048                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2049                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2050                                 if (req == NULL) {
2051                                         DEBUG(0, ("DOS open without an SMB "
2052                                                   "request!\n"));
2053                                         TALLOC_FREE(lck);
2054                                         return NT_STATUS_INTERNAL_ERROR;
2055                                 }
2056
2057                                 /* Use the client requested access mask here,
2058                                  * not the one we open with. */
2059                                 status = fcb_or_dos_open(req,
2060                                                         conn,
2061                                                         fsp,
2062                                                         smb_fname,
2063                                                         id,
2064                                                         req->smbpid,
2065                                                         req->vuid,
2066                                                         access_mask,
2067                                                         share_access,
2068                                                         create_options);
2069
2070                                 if (NT_STATUS_IS_OK(status)) {
2071                                         TALLOC_FREE(lck);
2072                                         if (pinfo) {
2073                                                 *pinfo = FILE_WAS_OPENED;
2074                                         }
2075                                         return NT_STATUS_OK;
2076                                 }
2077                         }
2078
2079                         /*
2080                          * This next line is a subtlety we need for
2081                          * MS-Access. If a file open will fail due to share
2082                          * permissions and also for security (access) reasons,
2083                          * we need to return the access failed error, not the
2084                          * share error. We can't open the file due to kernel
2085                          * oplock deadlock (it's possible we failed above on
2086                          * the open_mode_check()) so use a userspace check.
2087                          */
2088
2089                         if (flags & O_RDWR) {
2090                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2091                         } else if (flags & O_WRONLY) {
2092                                 can_access_mask = FILE_WRITE_DATA;
2093                         } else {
2094                                 can_access_mask = FILE_READ_DATA;
2095                         }
2096
2097                         if (((can_access_mask & FILE_WRITE_DATA) &&
2098                                 !CAN_WRITE(conn)) ||
2099                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2100                                                 smb_fname, can_access_mask))) {
2101                                 can_access = False;
2102                         }
2103
2104                         /*
2105                          * If we're returning a share violation, ensure we
2106                          * cope with the braindead 1 second delay.
2107                          */
2108
2109                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2110                             lp_defer_sharing_violations()) {
2111                                 struct timeval timeout;
2112                                 struct deferred_open_record state;
2113                                 int timeout_usecs;
2114
2115                                 /* this is a hack to speed up torture tests
2116                                    in 'make test' */
2117                                 timeout_usecs = lp_parm_int(SNUM(conn),
2118                                                             "smbd","sharedelay",
2119                                                             SHARING_VIOLATION_USEC_WAIT);
2120
2121                                 /* This is a relative time, added to the absolute
2122                                    request_time value to get the absolute timeout time.
2123                                    Note that if this is the second or greater time we enter
2124                                    this codepath for this particular request mid then
2125                                    request_time is left as the absolute time of the *first*
2126                                    time this request mid was processed. This is what allows
2127                                    the request to eventually time out. */
2128
2129                                 timeout = timeval_set(0, timeout_usecs);
2130
2131                                 /* Nothing actually uses state.delayed_for_oplocks
2132                                    but it's handy to differentiate in debug messages
2133                                    between a 30 second delay due to oplock break, and
2134                                    a 1 second delay for share mode conflicts. */
2135
2136                                 state.delayed_for_oplocks = False;
2137                                 state.id = id;
2138
2139                                 if ((req != NULL)
2140                                     && !request_timed_out(request_time,
2141                                                           timeout)) {
2142                                         defer_open(lck, request_time, timeout,
2143                                                    req, &state);
2144                                 }
2145                         }
2146
2147                         TALLOC_FREE(lck);
2148                         if (can_access) {
2149                                 /*
2150                                  * We have detected a sharing violation here
2151                                  * so return the correct error code
2152                                  */
2153                                 status = NT_STATUS_SHARING_VIOLATION;
2154                         } else {
2155                                 status = NT_STATUS_ACCESS_DENIED;
2156                         }
2157                         return status;
2158                 }
2159
2160                 /*
2161                  * We exit this block with the share entry *locked*.....
2162                  */
2163         }
2164
2165         SMB_ASSERT(!file_existed || (lck != NULL));
2166
2167         /*
2168          * Ensure we pay attention to default ACLs on directories if required.
2169          */
2170
2171         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2172             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2173                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2174         }
2175
2176         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2177                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2178                  (unsigned int)flags, (unsigned int)flags2,
2179                  (unsigned int)unx_mode, (unsigned int)access_mask,
2180                  (unsigned int)open_access_mask));
2181
2182         /*
2183          * open_file strips any O_TRUNC flags itself.
2184          */
2185
2186         fsp_open = open_file(fsp, conn, req, parent_dir,
2187                              flags|flags2, unx_mode, access_mask,
2188                              open_access_mask);
2189
2190         if (!NT_STATUS_IS_OK(fsp_open)) {
2191                 TALLOC_FREE(lck);
2192                 return fsp_open;
2193         }
2194
2195         if (!file_existed) {
2196                 struct byte_range_lock *br_lck = NULL;
2197                 struct share_mode_entry *batch_entry = NULL;
2198                 struct share_mode_entry *exclusive_entry = NULL;
2199                 bool got_level2_oplock = false;
2200                 bool got_a_none_oplock = false;
2201                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2202                 struct file_id id;
2203                 /*
2204                  * Deal with the race condition where two smbd's detect the
2205                  * file doesn't exist and do the create at the same time. One
2206                  * of them will win and set a share mode, the other (ie. this
2207                  * one) should check if the requested share mode for this
2208                  * create is allowed.
2209                  */
2210
2211                 /*
2212                  * Now the file exists and fsp is successfully opened,
2213                  * fsp->dev and fsp->inode are valid and should replace the
2214                  * dev=0,inode=0 from a non existent file. Spotted by
2215                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2216                  */
2217
2218                 id = fsp->file_id;
2219
2220                 if (!acquire_ordered_locks(talloc_tos(),
2221                                         fsp,
2222                                         id,
2223                                         conn->connectpath,
2224                                         smb_fname,
2225                                         &old_write_time,
2226                                         &lck,
2227                                         &br_lck)) {
2228                         return NT_STATUS_SHARING_VIOLATION;
2229                 }
2230
2231                 /* Get the types we need to examine. */
2232                 find_oplock_types(fsp,
2233                                 oplock_request,
2234                                 lck,
2235                                 &batch_entry,
2236                                 &exclusive_entry,
2237                                 &got_level2_oplock,
2238                                 &got_a_none_oplock);
2239
2240                 /* First pass - send break only on batch oplocks. */
2241                 if ((req != NULL) &&
2242                                 delay_for_batch_oplocks(fsp,
2243                                         req->mid,
2244                                         oplock_request,
2245                                         batch_entry)) {
2246                         schedule_defer_open(lck, request_time, req);
2247                         TALLOC_FREE(lck);
2248                         fd_close(fsp);
2249                         return NT_STATUS_SHARING_VIOLATION;
2250                 }
2251
2252                 status = open_mode_check(conn, lck, fsp->name_hash,
2253                                         access_mask, share_access,
2254                                          create_options, &file_existed);
2255
2256                 if (NT_STATUS_IS_OK(status)) {
2257                         /* We might be going to allow this open. Check oplock
2258                          * status again. */
2259                         /* Second pass - send break for both batch or
2260                          * exclusive oplocks. */
2261                         if ((req != NULL) &&
2262                                         delay_for_exclusive_oplocks(
2263                                                 fsp,
2264                                                 req->mid,
2265                                                 oplock_request,
2266                                                 exclusive_entry)) {
2267                                 schedule_defer_open(lck, request_time, req);
2268                                 TALLOC_FREE(lck);
2269                                 fd_close(fsp);
2270                                 return NT_STATUS_SHARING_VIOLATION;
2271                         }
2272                 }
2273
2274                 if (!NT_STATUS_IS_OK(status)) {
2275                         struct deferred_open_record state;
2276
2277                         state.delayed_for_oplocks = False;
2278                         state.id = id;
2279
2280                         /* Do it all over again immediately. In the second
2281                          * round we will find that the file existed and handle
2282                          * the DELETE_PENDING and FCB cases correctly. No need
2283                          * to duplicate the code here. Essentially this is a
2284                          * "goto top of this function", but don't tell
2285                          * anybody... */
2286
2287                         if (req != NULL) {
2288                                 defer_open(lck, request_time, timeval_zero(),
2289                                            req, &state);
2290                         }
2291                         TALLOC_FREE(lck);
2292                         fd_close(fsp);
2293                         return status;
2294                 }
2295
2296                 grant_fsp_oplock_type(fsp,
2297                                 br_lck,
2298                                 oplock_request,
2299                                 got_level2_oplock,
2300                                 got_a_none_oplock);
2301
2302                 /*
2303                  * We exit this block with the share entry *locked*.....
2304                  */
2305
2306         }
2307
2308         SMB_ASSERT(lck != NULL);
2309
2310         /* Delete streams if create_disposition requires it */
2311         if (file_existed && clear_ads &&
2312             !is_ntfs_stream_smb_fname(smb_fname)) {
2313                 status = delete_all_streams(conn, smb_fname->base_name);
2314                 if (!NT_STATUS_IS_OK(status)) {
2315                         TALLOC_FREE(lck);
2316                         fd_close(fsp);
2317                         return status;
2318                 }
2319         }
2320
2321         /* note that we ignore failure for the following. It is
2322            basically a hack for NFS, and NFS will never set one of
2323            these only read them. Nobody but Samba can ever set a deny
2324            mode and we have already checked our more authoritative
2325            locking database for permission to set this deny mode. If
2326            the kernel refuses the operations then the kernel is wrong.
2327            note that GPFS supports it as well - jmcd */
2328
2329         if (fsp->fh->fd != -1) {
2330                 int ret_flock;
2331                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2332                 if(ret_flock == -1 ){
2333
2334                         TALLOC_FREE(lck);
2335                         fd_close(fsp);
2336
2337                         return NT_STATUS_SHARING_VIOLATION;
2338                 }
2339         }
2340
2341         /*
2342          * At this point onwards, we can guarentee that the share entry
2343          * is locked, whether we created the file or not, and that the
2344          * deny mode is compatible with all current opens.
2345          */
2346
2347         /*
2348          * If requested, truncate the file.
2349          */
2350
2351         if (file_existed && (flags2&O_TRUNC)) {
2352                 /*
2353                  * We are modifing the file after open - update the stat
2354                  * struct..
2355                  */
2356                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2357                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2358                         status = map_nt_error_from_unix(errno);
2359                         TALLOC_FREE(lck);
2360                         fd_close(fsp);
2361                         return status;
2362                 }
2363         }
2364
2365         /*
2366          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2367          * but we don't have to store this - just ignore it on access check.
2368          */
2369         if (conn->sconn->using_smb2) {
2370                 /*
2371                  * SMB2 doesn't return it (according to Microsoft tests).
2372                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2373                  * File created with access = 0x7 (Read, Write, Delete)
2374                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2375                  */
2376                 fsp->access_mask = access_mask;
2377         } else {
2378                 /* But SMB1 does. */
2379                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2380         }
2381
2382         if (file_existed) {
2383                 /* stat opens on existing files don't get oplocks. */
2384                 if (is_stat_open(open_access_mask)) {
2385                         fsp->oplock_type = NO_OPLOCK;
2386                 }
2387
2388                 if (flags2 & O_TRUNC) {
2389                         info = FILE_WAS_OVERWRITTEN;
2390                 } else {
2391                         info = FILE_WAS_OPENED;
2392                 }
2393         } else {
2394                 info = FILE_WAS_CREATED;
2395         }
2396
2397         if (pinfo) {
2398                 *pinfo = info;
2399         }
2400
2401         /*
2402          * Setup the oplock info in both the shared memory and
2403          * file structs.
2404          */
2405
2406         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2407                 /*
2408                  * Could not get the kernel oplock or there are byte-range
2409                  * locks on the file.
2410                  */
2411                 fsp->oplock_type = NO_OPLOCK;
2412         }
2413
2414         set_share_mode(lck, fsp, get_current_uid(conn),
2415                         req ? req->mid : 0,
2416                        fsp->oplock_type);
2417
2418         /* Handle strange delete on close create semantics. */
2419         if (create_options & FILE_DELETE_ON_CLOSE) {
2420
2421                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2422
2423                 if (!NT_STATUS_IS_OK(status)) {
2424                         /* Remember to delete the mode we just added. */
2425                         del_share_mode(lck, fsp);
2426                         TALLOC_FREE(lck);
2427                         fd_close(fsp);
2428                         return status;
2429                 }
2430                 /* Note that here we set the *inital* delete on close flag,
2431                    not the regular one. The magic gets handled in close. */
2432                 fsp->initial_delete_on_close = True;
2433         }
2434
2435         if (info == FILE_WAS_OVERWRITTEN
2436             || info == FILE_WAS_CREATED
2437             || info == FILE_WAS_SUPERSEDED) {
2438                 new_file_created = True;
2439         }
2440
2441         if (new_file_created) {
2442                 /* Files should be initially set as archive */
2443                 if (lp_map_archive(SNUM(conn)) ||
2444                     lp_store_dos_attributes(SNUM(conn))) {
2445                         if (!posix_open) {
2446                                 if (file_set_dosmode(conn, smb_fname,
2447                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2448                                             parent_dir, true) == 0) {
2449                                         unx_mode = smb_fname->st.st_ex_mode;
2450                                 }
2451                         }
2452                 }
2453         }
2454
2455         /* Determine sparse flag. */
2456         if (posix_open) {
2457                 /* POSIX opens are sparse by default. */
2458                 fsp->is_sparse = true;
2459         } else {
2460                 fsp->is_sparse = (file_existed &&
2461                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2462         }
2463
2464         /*
2465          * Take care of inherited ACLs on created files - if default ACL not
2466          * selected.
2467          */
2468
2469         if (!posix_open && !file_existed && !def_acl) {
2470
2471                 int saved_errno = errno; /* We might get ENOSYS in the next
2472                                           * call.. */
2473
2474                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2475                     errno == ENOSYS) {
2476                         errno = saved_errno; /* Ignore ENOSYS */
2477                 }
2478
2479         } else if (new_unx_mode) {
2480
2481                 int ret = -1;
2482
2483                 /* Attributes need changing. File already existed. */
2484
2485                 {
2486                         int saved_errno = errno; /* We might get ENOSYS in the
2487                                                   * next call.. */
2488                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2489
2490                         if (ret == -1 && errno == ENOSYS) {
2491                                 errno = saved_errno; /* Ignore ENOSYS */
2492                         } else {
2493                                 DEBUG(5, ("open_file_ntcreate: reset "
2494                                           "attributes of file %s to 0%o\n",
2495                                           smb_fname_str_dbg(smb_fname),
2496                                           (unsigned int)new_unx_mode));
2497                                 ret = 0; /* Don't do the fchmod below. */
2498                         }
2499                 }
2500
2501                 if ((ret == -1) &&
2502                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2503                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2504                                   "attributes of file %s to 0%o\n",
2505                                   smb_fname_str_dbg(smb_fname),
2506                                   (unsigned int)new_unx_mode));
2507         }
2508
2509         /* If this is a successful open, we must remove any deferred open
2510          * records. */
2511         if (req != NULL) {
2512                 del_deferred_open_entry(lck, req->mid,
2513                                         messaging_server_id(req->sconn->msg_ctx));
2514         }
2515         TALLOC_FREE(lck);
2516
2517         return NT_STATUS_OK;
2518 }
2519
2520
2521 /****************************************************************************
2522  Open a file for for write to ensure that we can fchmod it.
2523 ****************************************************************************/
2524
2525 NTSTATUS open_file_fchmod(connection_struct *conn,
2526                           struct smb_filename *smb_fname,
2527                           files_struct **result)
2528 {
2529         if (!VALID_STAT(smb_fname->st)) {
2530                 return NT_STATUS_INVALID_PARAMETER;
2531         }
2532
2533         return SMB_VFS_CREATE_FILE(
2534                 conn,                                   /* conn */
2535                 NULL,                                   /* req */
2536                 0,                                      /* root_dir_fid */
2537                 smb_fname,                              /* fname */
2538                 FILE_WRITE_DATA,                        /* access_mask */
2539                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2540                     FILE_SHARE_DELETE),
2541                 FILE_OPEN,                              /* create_disposition*/
2542                 0,                                      /* create_options */
2543                 0,                                      /* file_attributes */
2544                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2545                 0,                                      /* allocation_size */
2546                 0,                                      /* private_flags */
2547                 NULL,                                   /* sd */
2548                 NULL,                                   /* ea_list */
2549                 result,                                 /* result */
2550                 NULL);                                  /* pinfo */
2551 }
2552
2553 static NTSTATUS mkdir_internal(connection_struct *conn,
2554                                struct smb_filename *smb_dname,
2555                                uint32 file_attributes)
2556 {
2557         mode_t mode;
2558         char *parent_dir = NULL;
2559         NTSTATUS status;
2560         bool posix_open = false;
2561         bool need_re_stat = false;
2562         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2563
2564         if(access_mask & ~(conn->share_access)) {
2565                 DEBUG(5,("mkdir_internal: failing share access "
2566                          "%s\n", lp_servicename(SNUM(conn))));
2567                 return NT_STATUS_ACCESS_DENIED;
2568         }
2569
2570         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2571                             NULL)) {
2572                 return NT_STATUS_NO_MEMORY;
2573         }
2574
2575         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2576                 posix_open = true;
2577                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2578         } else {
2579                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2580         }
2581
2582         status = check_parent_access(conn,
2583                                         smb_dname,
2584                                         access_mask,
2585                                         &parent_dir);
2586         if(!NT_STATUS_IS_OK(status)) {
2587                 DEBUG(5,("mkdir_internal: check_parent_access "
2588                         "on directory %s for path %s returned %s\n",
2589                         parent_dir,
2590                         smb_dname->base_name,
2591                         nt_errstr(status) ));
2592                 return status;
2593         }
2594
2595         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2596                 return map_nt_error_from_unix(errno);
2597         }
2598
2599         /* Ensure we're checking for a symlink here.... */
2600         /* We don't want to get caught by a symlink racer. */
2601
2602         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2603                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2604                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2605                 return map_nt_error_from_unix(errno);
2606         }
2607
2608         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2609                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2610                           smb_fname_str_dbg(smb_dname)));
2611                 return NT_STATUS_NOT_A_DIRECTORY;
2612         }
2613
2614         if (lp_store_dos_attributes(SNUM(conn))) {
2615                 if (!posix_open) {
2616                         file_set_dosmode(conn, smb_dname,
2617                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2618                                          parent_dir, true);
2619                 }
2620         }
2621
2622         if (lp_inherit_perms(SNUM(conn))) {
2623                 inherit_access_posix_acl(conn, parent_dir,
2624                                          smb_dname->base_name, mode);
2625                 need_re_stat = true;
2626         }
2627
2628         if (!posix_open) {
2629                 /*
2630                  * Check if high bits should have been set,
2631                  * then (if bits are missing): add them.
2632                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2633                  * dir.
2634                  */
2635                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2636                     (mode & ~smb_dname->st.st_ex_mode)) {
2637                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2638                                       (smb_dname->st.st_ex_mode |
2639                                           (mode & ~smb_dname->st.st_ex_mode)));
2640                         need_re_stat = true;
2641                 }
2642         }
2643
2644         /* Change the owner if required. */
2645         if (lp_inherit_owner(SNUM(conn))) {
2646                 change_dir_owner_to_parent(conn, parent_dir,
2647                                            smb_dname->base_name,
2648                                            &smb_dname->st);
2649                 need_re_stat = true;
2650         }
2651
2652         if (need_re_stat) {
2653                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2654                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2655                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2656                         return map_nt_error_from_unix(errno);
2657                 }
2658         }
2659
2660         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2661                      smb_dname->base_name);
2662
2663         return NT_STATUS_OK;
2664 }
2665
2666 /****************************************************************************
2667  Ensure we didn't get symlink raced on opening a directory.
2668 ****************************************************************************/
2669
2670 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2671                         const SMB_STRUCT_STAT *sbuf2)
2672 {
2673         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2674                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2675                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2676                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2677                 return false;
2678         }
2679         return true;
2680 }
2681
2682 /****************************************************************************
2683  Open a directory from an NT SMB call.
2684 ****************************************************************************/
2685
2686 static NTSTATUS open_directory(connection_struct *conn,
2687                                struct smb_request *req,
2688                                struct smb_filename *smb_dname,
2689                                uint32 access_mask,
2690                                uint32 share_access,
2691                                uint32 create_disposition,
2692                                uint32 create_options,
2693                                uint32 file_attributes,
2694                                int *pinfo,
2695                                files_struct **result)
2696 {
2697         files_struct *fsp = NULL;
2698         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2699         struct share_mode_lock *lck = NULL;
2700         NTSTATUS status;
2701         struct timespec mtimespec;
2702         int info = 0;
2703
2704         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2705
2706         /* Ensure we have a directory attribute. */
2707         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2708
2709         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2710                  "share_access = 0x%x create_options = 0x%x, "
2711                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2712                  smb_fname_str_dbg(smb_dname),
2713                  (unsigned int)access_mask,
2714                  (unsigned int)share_access,
2715                  (unsigned int)create_options,
2716                  (unsigned int)create_disposition,
2717                  (unsigned int)file_attributes));
2718
2719         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2720                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2721                         is_ntfs_stream_smb_fname(smb_dname)) {
2722                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2723                           smb_fname_str_dbg(smb_dname)));
2724                 return NT_STATUS_NOT_A_DIRECTORY;
2725         }
2726
2727         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2728                                             access_mask, &access_mask);
2729         if (!NT_STATUS_IS_OK(status)) {
2730                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2731                         "on file %s returned %s\n",
2732                         smb_fname_str_dbg(smb_dname),
2733                         nt_errstr(status)));
2734                 return status;
2735         }
2736
2737         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2738                         !security_token_has_privilege(get_current_nttok(conn),
2739                                         SEC_PRIV_SECURITY)) {
2740                 DEBUG(10, ("open_directory: open on %s "
2741                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2742                         smb_fname_str_dbg(smb_dname)));
2743                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2744         }
2745
2746         switch( create_disposition ) {
2747                 case FILE_OPEN:
2748
2749                         if (!dir_existed) {
2750                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2751                         }
2752
2753                         info = FILE_WAS_OPENED;
2754                         break;
2755
2756                 case FILE_CREATE:
2757
2758                         /* If directory exists error. If directory doesn't
2759                          * exist create. */
2760
2761                         if (dir_existed) {
2762                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2763                                 DEBUG(2, ("open_directory: unable to create "
2764                                           "%s. Error was %s\n",
2765                                           smb_fname_str_dbg(smb_dname),
2766                                           nt_errstr(status)));
2767                                 return status;
2768                         }
2769
2770                         status = mkdir_internal(conn, smb_dname,
2771                                                 file_attributes);
2772
2773                         if (!NT_STATUS_IS_OK(status)) {
2774                                 DEBUG(2, ("open_directory: unable to create "
2775                                           "%s. Error was %s\n",
2776                                           smb_fname_str_dbg(smb_dname),
2777                                           nt_errstr(status)));
2778                                 return status;
2779                         }
2780
2781                         info = FILE_WAS_CREATED;
2782                         break;
2783
2784                 case FILE_OPEN_IF:
2785                         /*
2786                          * If directory exists open. If directory doesn't
2787                          * exist create.
2788                          */
2789
2790                         if (dir_existed) {
2791                                 status = NT_STATUS_OK;
2792                                 info = FILE_WAS_OPENED;
2793                         } else {
2794                                 status = mkdir_internal(conn, smb_dname,
2795                                                 file_attributes);
2796
2797                                 if (NT_STATUS_IS_OK(status)) {
2798                                         info = FILE_WAS_CREATED;
2799                                 } else {
2800                                         /* Cope with create race. */
2801                                         if (!NT_STATUS_EQUAL(status,
2802                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2803                                                 DEBUG(2, ("open_directory: unable to create "
2804                                                         "%s. Error was %s\n",
2805                                                         smb_fname_str_dbg(smb_dname),
2806                                                         nt_errstr(status)));
2807                                                 return status;
2808                                         }
2809                                         info = FILE_WAS_OPENED;
2810                                 }
2811                         }
2812
2813                         break;
2814
2815                 case FILE_SUPERSEDE:
2816                 case FILE_OVERWRITE:
2817                 case FILE_OVERWRITE_IF:
2818                 default:
2819                         DEBUG(5,("open_directory: invalid create_disposition "
2820                                  "0x%x for directory %s\n",
2821                                  (unsigned int)create_disposition,
2822                                  smb_fname_str_dbg(smb_dname)));
2823                         return NT_STATUS_INVALID_PARAMETER;
2824         }
2825
2826         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2827                 DEBUG(5,("open_directory: %s is not a directory !\n",
2828                          smb_fname_str_dbg(smb_dname)));
2829                 return NT_STATUS_NOT_A_DIRECTORY;
2830         }
2831
2832         if (info == FILE_WAS_OPENED) {
2833                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2834                 if (!NT_STATUS_IS_OK(status)) {
2835                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2836                                 "file %s failed with %s\n",
2837                                 smb_fname_str_dbg(smb_dname),
2838                                 nt_errstr(status)));
2839                         return status;
2840                 }
2841         }
2842
2843         status = file_new(req, conn, &fsp);
2844         if(!NT_STATUS_IS_OK(status)) {
2845                 return status;
2846         }
2847
2848         /*
2849          * Setup the files_struct for it.
2850          */
2851
2852         fsp->mode = smb_dname->st.st_ex_mode;
2853         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2854         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2855         fsp->file_pid = req ? req->smbpid : 0;
2856         fsp->can_lock = False;
2857         fsp->can_read = False;
2858         fsp->can_write = False;
2859
2860         fsp->share_access = share_access;
2861         fsp->fh->private_options = 0;
2862         /*
2863          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2864          */
2865         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2866         fsp->print_file = NULL;
2867         fsp->modified = False;
2868         fsp->oplock_type = NO_OPLOCK;
2869         fsp->sent_oplock_break = NO_BREAK_SENT;
2870         fsp->is_directory = True;
2871         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2872         status = fsp_set_smb_fname(fsp, smb_dname);
2873         if (!NT_STATUS_IS_OK(status)) {
2874                 file_free(req, fsp);
2875                 return status;
2876         }
2877
2878         mtimespec = smb_dname->st.st_ex_mtime;
2879
2880 #ifdef O_DIRECTORY
2881         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2882 #else
2883         /* POSIX allows us to open a directory with O_RDONLY. */
2884         status = fd_open(conn, fsp, O_RDONLY, 0);
2885 #endif
2886         if (!NT_STATUS_IS_OK(status)) {
2887                 DEBUG(5, ("open_directory: Could not open fd for "
2888                         "%s (%s)\n",
2889                         smb_fname_str_dbg(smb_dname),
2890                         nt_errstr(status)));
2891                 file_free(req, fsp);
2892                 return status;
2893         }
2894
2895         status = vfs_stat_fsp(fsp);
2896         if (!NT_STATUS_IS_OK(status)) {
2897                 fd_close(fsp);
2898                 file_free(req, fsp);
2899                 return status;
2900         }
2901
2902         /* Ensure there was no race condition. */
2903         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2904                 DEBUG(5,("open_directory: stat struct differs for "
2905                         "directory %s.\n",
2906                         smb_fname_str_dbg(smb_dname)));
2907                 fd_close(fsp);
2908                 file_free(req, fsp);
2909                 return NT_STATUS_ACCESS_DENIED;
2910         }
2911
2912         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2913                                   conn->connectpath, smb_dname, &mtimespec);
2914
2915         if (lck == NULL) {
2916                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2917                           "%s\n", smb_fname_str_dbg(smb_dname)));
2918                 fd_close(fsp);
2919                 file_free(req, fsp);
2920                 return NT_STATUS_SHARING_VIOLATION;
2921         }
2922
2923         status = open_mode_check(conn, lck, fsp->name_hash,
2924                                 access_mask, share_access,
2925                                  create_options, &dir_existed);
2926
2927         if (!NT_STATUS_IS_OK(status)) {
2928                 TALLOC_FREE(lck);
2929                 fd_close(fsp);
2930                 file_free(req, fsp);
2931                 return status;
2932         }
2933
2934         set_share_mode(lck, fsp, get_current_uid(conn),
2935                         req ? req->mid : 0, NO_OPLOCK);
2936
2937         /* For directories the delete on close bit at open time seems
2938            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2939         if (create_options & FILE_DELETE_ON_CLOSE) {
2940                 status = can_set_delete_on_close(fsp, 0);
2941                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2942                         TALLOC_FREE(lck);
2943                         fd_close(fsp);
2944                         file_free(req, fsp);
2945                         return status;
2946                 }
2947
2948                 if (NT_STATUS_IS_OK(status)) {
2949                         /* Note that here we set the *inital* delete on close flag,
2950                            not the regular one. The magic gets handled in close. */
2951                         fsp->initial_delete_on_close = True;
2952                 }
2953         }
2954
2955         TALLOC_FREE(lck);
2956
2957         if (pinfo) {
2958                 *pinfo = info;
2959         }
2960
2961         *result = fsp;
2962         return NT_STATUS_OK;
2963 }
2964
2965 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2966                           struct smb_filename *smb_dname)
2967 {
2968         NTSTATUS status;
2969         files_struct *fsp;
2970
2971         status = SMB_VFS_CREATE_FILE(
2972                 conn,                                   /* conn */
2973                 req,                                    /* req */
2974                 0,                                      /* root_dir_fid */
2975                 smb_dname,                              /* fname */
2976                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2977                 FILE_SHARE_NONE,                        /* share_access */
2978                 FILE_CREATE,                            /* create_disposition*/
2979                 FILE_DIRECTORY_FILE,                    /* create_options */
2980                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2981                 0,                                      /* oplock_request */
2982                 0,                                      /* allocation_size */
2983                 0,                                      /* private_flags */
2984                 NULL,                                   /* sd */
2985                 NULL,                                   /* ea_list */
2986                 &fsp,                                   /* result */
2987                 NULL);                                  /* pinfo */
2988
2989         if (NT_STATUS_IS_OK(status)) {
2990                 close_file(req, fsp, NORMAL_CLOSE);
2991         }
2992
2993         return status;
2994 }
2995
2996 /****************************************************************************
2997  Receive notification that one of our open files has been renamed by another
2998  smbd process.
2999 ****************************************************************************/
3000
3001 void msg_file_was_renamed(struct messaging_context *msg,
3002                           void *private_data,
3003                           uint32_t msg_type,
3004                           struct server_id server_id,
3005                           DATA_BLOB *data)
3006 {
3007         files_struct *fsp;
3008         char *frm = (char *)data->data;
3009         struct file_id id;
3010         const char *sharepath;
3011         const char *base_name;
3012         const char *stream_name;
3013         struct smb_filename *smb_fname = NULL;
3014         size_t sp_len, bn_len;
3015         NTSTATUS status;
3016         struct smbd_server_connection *sconn =
3017                 talloc_get_type_abort(private_data,
3018                 struct smbd_server_connection);
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  Create a default ACL by inheriting from the parent. If no inheritance
3199  from the parent available, don't set anything. This will leave the actual
3200  permissions the new file or directory already got from the filesystem
3201  as the NT ACL when read.
3202 *********************************************************************/
3203
3204 static NTSTATUS inherit_new_acl(files_struct *fsp)
3205 {
3206         TALLOC_CTX *ctx = talloc_tos();
3207         char *parent_name = NULL;
3208         struct security_descriptor *parent_desc = NULL;
3209         NTSTATUS status = NT_STATUS_OK;
3210         struct security_descriptor *psd = NULL;
3211         struct dom_sid *owner_sid = NULL;
3212         struct dom_sid *group_sid = NULL;
3213         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3214         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3215         bool inheritable_components = false;
3216         size_t size = 0;
3217
3218         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3219                 return NT_STATUS_NO_MEMORY;
3220         }
3221
3222         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3223                                 parent_name,
3224                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3225                                 &parent_desc);
3226         if (!NT_STATUS_IS_OK(status)) {
3227                 return status;
3228         }
3229
3230         inheritable_components = sd_has_inheritable_components(parent_desc,
3231                                         fsp->is_directory);
3232
3233         if (!inheritable_components && !inherit_owner) {
3234                 /* Nothing to inherit and not setting owner. */
3235                 return NT_STATUS_OK;
3236         }
3237
3238         /* Create an inherited descriptor from the parent. */
3239
3240         if (DEBUGLEVEL >= 10) {
3241                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3242                         fsp_str_dbg(fsp) ));
3243                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3244         }
3245
3246         /* Inherit from parent descriptor if "inherit owner" set. */
3247         if (inherit_owner) {
3248                 owner_sid = parent_desc->owner_sid;
3249                 group_sid = parent_desc->group_sid;
3250         }
3251
3252         if (owner_sid == NULL) {
3253                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3254         }
3255         if (group_sid == NULL) {
3256                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3257         }
3258
3259         status = se_create_child_secdesc(ctx,
3260                         &psd,
3261                         &size,
3262                         parent_desc,
3263                         owner_sid,
3264                         group_sid,
3265                         fsp->is_directory);
3266         if (!NT_STATUS_IS_OK(status)) {
3267                 return status;
3268         }
3269
3270         /* If inheritable_components == false,
3271            se_create_child_secdesc()
3272            creates a security desriptor with a NULL dacl
3273            entry, but with SEC_DESC_DACL_PRESENT. We need
3274            to remove that flag. */
3275
3276         if (!inheritable_components) {
3277                 security_info_sent &= ~SECINFO_DACL;
3278                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3279         }
3280
3281         if (DEBUGLEVEL >= 10) {
3282                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3283                         fsp_str_dbg(fsp) ));
3284                 NDR_PRINT_DEBUG(security_descriptor, psd);
3285         }
3286
3287         if (inherit_owner) {
3288                 /* We need to be root to force this. */
3289                 become_root();
3290         }
3291         status = SMB_VFS_FSET_NT_ACL(fsp,
3292                         security_info_sent,
3293                         psd);
3294         if (inherit_owner) {
3295                 unbecome_root();
3296         }
3297         return status;
3298 }
3299
3300 /*
3301  * Wrapper around open_file_ntcreate and open_directory
3302  */
3303
3304 static NTSTATUS create_file_unixpath(connection_struct *conn,
3305                                      struct smb_request *req,
3306                                      struct smb_filename *smb_fname,
3307                                      uint32_t access_mask,
3308                                      uint32_t share_access,
3309                                      uint32_t create_disposition,
3310                                      uint32_t create_options,
3311                                      uint32_t file_attributes,
3312                                      uint32_t oplock_request,
3313                                      uint64_t allocation_size,
3314                                      uint32_t private_flags,
3315                                      struct security_descriptor *sd,
3316                                      struct ea_list *ea_list,
3317
3318                                      files_struct **result,
3319                                      int *pinfo)
3320 {
3321         int info = FILE_WAS_OPENED;
3322         files_struct *base_fsp = NULL;
3323         files_struct *fsp = NULL;
3324         NTSTATUS status;
3325
3326         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3327                   "file_attributes = 0x%x, share_access = 0x%x, "
3328                   "create_disposition = 0x%x create_options = 0x%x "
3329                   "oplock_request = 0x%x private_flags = 0x%x "
3330                   "ea_list = 0x%p, sd = 0x%p, "
3331                   "fname = %s\n",
3332                   (unsigned int)access_mask,
3333                   (unsigned int)file_attributes,
3334                   (unsigned int)share_access,
3335                   (unsigned int)create_disposition,
3336                   (unsigned int)create_options,
3337                   (unsigned int)oplock_request,
3338                   (unsigned int)private_flags,
3339                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3340
3341         if (create_options & FILE_OPEN_BY_FILE_ID) {
3342                 status = NT_STATUS_NOT_SUPPORTED;
3343                 goto fail;
3344         }
3345
3346         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3347                 status = NT_STATUS_INVALID_PARAMETER;
3348                 goto fail;
3349         }
3350
3351         if (req == NULL) {
3352                 oplock_request |= INTERNAL_OPEN_ONLY;
3353         }
3354
3355         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3356             && (access_mask & DELETE_ACCESS)
3357             && !is_ntfs_stream_smb_fname(smb_fname)) {
3358                 /*
3359                  * We can't open a file with DELETE access if any of the
3360                  * streams is open without FILE_SHARE_DELETE
3361                  */
3362                 status = open_streams_for_delete(conn, smb_fname->base_name);
3363
3364                 if (!NT_STATUS_IS_OK(status)) {
3365                         goto fail;
3366                 }
3367         }
3368
3369         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3370                         !security_token_has_privilege(get_current_nttok(conn),
3371                                         SEC_PRIV_SECURITY)) {
3372                 DEBUG(10, ("create_file_unixpath: open on %s "
3373                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3374                         smb_fname_str_dbg(smb_fname)));
3375                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3376                 goto fail;
3377         }
3378
3379         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3380             && is_ntfs_stream_smb_fname(smb_fname)
3381             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3382                 uint32 base_create_disposition;
3383                 struct smb_filename *smb_fname_base = NULL;
3384
3385                 if (create_options & FILE_DIRECTORY_FILE) {
3386                         status = NT_STATUS_NOT_A_DIRECTORY;
3387                         goto fail;
3388                 }
3389
3390                 switch (create_disposition) {
3391                 case FILE_OPEN:
3392                         base_create_disposition = FILE_OPEN;
3393                         break;
3394                 default:
3395                         base_create_disposition = FILE_OPEN_IF;
3396                         break;
3397                 }
3398
3399                 /* Create an smb_filename with stream_name == NULL. */
3400                 status = create_synthetic_smb_fname(talloc_tos(),
3401                                                     smb_fname->base_name,
3402                                                     NULL, NULL,
3403                                                     &smb_fname_base);
3404                 if (!NT_STATUS_IS_OK(status)) {
3405                         goto fail;
3406                 }
3407
3408                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3409                         DEBUG(10, ("Unable to stat stream: %s\n",
3410                                    smb_fname_str_dbg(smb_fname_base)));
3411                 }
3412
3413                 /* Open the base file. */
3414                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3415                                               FILE_SHARE_READ
3416                                               | FILE_SHARE_WRITE
3417                                               | FILE_SHARE_DELETE,
3418                                               base_create_disposition,
3419                                               0, 0, 0, 0, 0, NULL, NULL,
3420                                               &base_fsp, NULL);
3421                 TALLOC_FREE(smb_fname_base);
3422
3423                 if (!NT_STATUS_IS_OK(status)) {
3424                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3425                                    "%s\n", smb_fname->base_name,
3426                                    nt_errstr(status)));
3427                         goto fail;
3428                 }
3429                 /* we don't need to low level fd */
3430                 fd_close(base_fsp);
3431         }
3432
3433         /*
3434          * If it's a request for a directory open, deal with it separately.
3435          */
3436
3437         if (create_options & FILE_DIRECTORY_FILE) {
3438
3439                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3440                         status = NT_STATUS_INVALID_PARAMETER;
3441                         goto fail;
3442                 }
3443
3444                 /* Can't open a temp directory. IFS kit test. */
3445                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3446                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3447                         status = NT_STATUS_INVALID_PARAMETER;
3448                         goto fail;
3449                 }
3450
3451                 /*
3452                  * We will get a create directory here if the Win32
3453                  * app specified a security descriptor in the
3454                  * CreateDirectory() call.
3455                  */
3456
3457                 oplock_request = 0;
3458                 status = open_directory(
3459                         conn, req, smb_fname, access_mask, share_access,
3460                         create_disposition, create_options, file_attributes,
3461                         &info, &fsp);
3462         } else {
3463
3464                 /*
3465                  * Ordinary file case.
3466                  */
3467
3468                 status = file_new(req, conn, &fsp);
3469                 if(!NT_STATUS_IS_OK(status)) {
3470                         goto fail;
3471                 }
3472
3473                 status = fsp_set_smb_fname(fsp, smb_fname);
3474                 if (!NT_STATUS_IS_OK(status)) {
3475                         goto fail;
3476                 }
3477
3478                 /*
3479                  * We're opening the stream element of a base_fsp
3480                  * we already opened. Set up the base_fsp pointer.
3481                  */
3482                 if (base_fsp) {
3483                         fsp->base_fsp = base_fsp;
3484                 }
3485
3486                 status = open_file_ntcreate(conn,
3487                                             req,
3488                                             access_mask,
3489                                             share_access,
3490                                             create_disposition,
3491                                             create_options,
3492                                             file_attributes,
3493                                             oplock_request,
3494                                             private_flags,
3495                                             &info,
3496                                             fsp);
3497
3498                 if(!NT_STATUS_IS_OK(status)) {
3499                         file_free(req, fsp);
3500                         fsp = NULL;
3501                 }
3502
3503                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3504
3505                         /* A stream open never opens a directory */
3506
3507                         if (base_fsp) {
3508                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3509                                 goto fail;
3510                         }
3511
3512                         /*
3513                          * Fail the open if it was explicitly a non-directory
3514                          * file.
3515                          */
3516
3517                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3518                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3519                                 goto fail;
3520                         }
3521
3522                         oplock_request = 0;
3523                         status = open_directory(
3524                                 conn, req, smb_fname, access_mask,
3525                                 share_access, create_disposition,
3526                                 create_options, file_attributes,
3527                                 &info, &fsp);
3528                 }
3529         }
3530
3531         if (!NT_STATUS_IS_OK(status)) {
3532                 goto fail;
3533         }
3534
3535         fsp->base_fsp = base_fsp;
3536
3537         if ((ea_list != NULL) &&
3538             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3539                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3540                 if (!NT_STATUS_IS_OK(status)) {
3541                         goto fail;
3542                 }
3543         }
3544
3545         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3546                 status = NT_STATUS_ACCESS_DENIED;
3547                 goto fail;
3548         }
3549
3550         /* Save the requested allocation size. */
3551         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3552                 if (allocation_size
3553                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3554                         fsp->initial_allocation_size = smb_roundup(
3555                                 fsp->conn, allocation_size);
3556                         if (fsp->is_directory) {
3557                                 /* Can't set allocation size on a directory. */
3558                                 status = NT_STATUS_ACCESS_DENIED;
3559                                 goto fail;
3560                         }
3561                         if (vfs_allocate_file_space(
3562                                     fsp, fsp->initial_allocation_size) == -1) {
3563                                 status = NT_STATUS_DISK_FULL;
3564                                 goto fail;
3565                         }
3566                 } else {
3567                         fsp->initial_allocation_size = smb_roundup(
3568                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3569                 }
3570         }
3571
3572         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3573                                 fsp->base_fsp == NULL) {
3574                 if (sd != NULL) {
3575                         /*
3576                          * According to the MS documentation, the only time the security
3577                          * descriptor is applied to the opened file is iff we *created* the
3578                          * file; an existing file stays the same.
3579                          *
3580                          * Also, it seems (from observation) that you can open the file with
3581                          * any access mask but you can still write the sd. We need to override
3582                          * the granted access before we call set_sd
3583                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3584                          */
3585
3586                         uint32_t sec_info_sent;
3587                         uint32_t saved_access_mask = fsp->access_mask;
3588
3589                         sec_info_sent = get_sec_info(sd);
3590
3591                         fsp->access_mask = FILE_GENERIC_ALL;
3592
3593                         /* Convert all the generic bits. */
3594                         security_acl_map_generic(sd->dacl, &file_generic_mapping);
3595                         security_acl_map_generic(sd->sacl, &file_generic_mapping);
3596
3597                         if (sec_info_sent & (SECINFO_OWNER|
3598                                                 SECINFO_GROUP|
3599                                                 SECINFO_DACL|
3600                                                 SECINFO_SACL)) {
3601                                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3602                         }
3603
3604                         fsp->access_mask = saved_access_mask;
3605
3606                         if (!NT_STATUS_IS_OK(status)) {
3607                                 goto fail;
3608                         }
3609                 } else if (lp_inherit_acls(SNUM(conn))) {
3610                         /* Inherit from parent. Errors here are not fatal. */
3611                         status = inherit_new_acl(fsp);
3612                         if (!NT_STATUS_IS_OK(status)) {
3613                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3614                                         fsp_str_dbg(fsp),
3615                                         nt_errstr(status) ));
3616                         }
3617                 }
3618         }
3619
3620         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3621
3622         *result = fsp;
3623         if (pinfo != NULL) {
3624                 *pinfo = info;
3625         }
3626
3627         smb_fname->st = fsp->fsp_name->st;
3628
3629         return NT_STATUS_OK;
3630
3631  fail:
3632         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3633
3634         if (fsp != NULL) {
3635                 if (base_fsp && fsp->base_fsp == base_fsp) {
3636                         /*
3637                          * The close_file below will close
3638                          * fsp->base_fsp.
3639                          */
3640                         base_fsp = NULL;
3641                 }
3642                 close_file(req, fsp, ERROR_CLOSE);
3643                 fsp = NULL;
3644         }
3645         if (base_fsp != NULL) {
3646                 close_file(req, base_fsp, ERROR_CLOSE);
3647                 base_fsp = NULL;
3648         }
3649         return status;
3650 }
3651
3652 /*
3653  * Calculate the full path name given a relative fid.
3654  */
3655 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3656                                    struct smb_request *req,
3657                                    uint16_t root_dir_fid,
3658                                    const struct smb_filename *smb_fname,
3659                                    struct smb_filename **smb_fname_out)
3660 {
3661         files_struct *dir_fsp;
3662         char *parent_fname = NULL;
3663         char *new_base_name = NULL;
3664         NTSTATUS status;
3665
3666         if (root_dir_fid == 0 || !smb_fname) {
3667                 status = NT_STATUS_INTERNAL_ERROR;
3668                 goto out;
3669         }
3670
3671         dir_fsp = file_fsp(req, root_dir_fid);
3672
3673         if (dir_fsp == NULL) {
3674                 status = NT_STATUS_INVALID_HANDLE;
3675                 goto out;
3676         }
3677
3678         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3679                 status = NT_STATUS_INVALID_HANDLE;
3680                 goto out;
3681         }
3682
3683         if (!dir_fsp->is_directory) {
3684
3685                 /*
3686                  * Check to see if this is a mac fork of some kind.
3687                  */
3688
3689                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3690                     is_ntfs_stream_smb_fname(smb_fname)) {
3691                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3692                         goto out;
3693                 }
3694
3695                 /*
3696                   we need to handle the case when we get a
3697                   relative open relative to a file and the
3698                   pathname is blank - this is a reopen!
3699                   (hint from demyn plantenberg)
3700                 */
3701
3702                 status = NT_STATUS_INVALID_HANDLE;
3703                 goto out;
3704         }
3705
3706         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3707                 /*
3708                  * We're at the toplevel dir, the final file name
3709                  * must not contain ./, as this is filtered out
3710                  * normally by srvstr_get_path and unix_convert
3711                  * explicitly rejects paths containing ./.
3712                  */
3713                 parent_fname = talloc_strdup(talloc_tos(), "");
3714                 if (parent_fname == NULL) {
3715                         status = NT_STATUS_NO_MEMORY;
3716                         goto out;
3717                 }
3718         } else {
3719                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3720
3721                 /*
3722                  * Copy in the base directory name.
3723                  */
3724
3725                 parent_fname = talloc_array(talloc_tos(), char,
3726                     dir_name_len+2);
3727                 if (parent_fname == NULL) {
3728                         status = NT_STATUS_NO_MEMORY;
3729                         goto out;
3730                 }
3731                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3732                     dir_name_len+1);
3733
3734                 /*
3735                  * Ensure it ends in a '/'.
3736                  * We used TALLOC_SIZE +2 to add space for the '/'.
3737                  */
3738
3739                 if(dir_name_len
3740                     && (parent_fname[dir_name_len-1] != '\\')
3741                     && (parent_fname[dir_name_len-1] != '/')) {
3742                         parent_fname[dir_name_len] = '/';
3743                         parent_fname[dir_name_len+1] = '\0';
3744                 }
3745         }
3746
3747         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3748                                         smb_fname->base_name);
3749         if (new_base_name == NULL) {
3750                 status = NT_STATUS_NO_MEMORY;
3751                 goto out;
3752         }
3753
3754         status = filename_convert(req,
3755                                 conn,
3756                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3757                                 new_base_name,
3758                                 0,
3759                                 NULL,
3760                                 smb_fname_out);
3761         if (!NT_STATUS_IS_OK(status)) {
3762                 goto out;
3763         }
3764
3765  out:
3766         TALLOC_FREE(parent_fname);
3767         TALLOC_FREE(new_base_name);
3768         return status;
3769 }
3770
3771 NTSTATUS create_file_default(connection_struct *conn,
3772                              struct smb_request *req,
3773                              uint16_t root_dir_fid,
3774                              struct smb_filename *smb_fname,
3775                              uint32_t access_mask,
3776                              uint32_t share_access,
3777                              uint32_t create_disposition,
3778                              uint32_t create_options,
3779                              uint32_t file_attributes,
3780                              uint32_t oplock_request,
3781                              uint64_t allocation_size,
3782                              uint32_t private_flags,
3783                              struct security_descriptor *sd,
3784                              struct ea_list *ea_list,
3785                              files_struct **result,
3786                              int *pinfo)
3787 {
3788         int info = FILE_WAS_OPENED;
3789         files_struct *fsp = NULL;
3790         NTSTATUS status;
3791         bool stream_name = false;
3792
3793         DEBUG(10,("create_file: access_mask = 0x%x "
3794                   "file_attributes = 0x%x, share_access = 0x%x, "
3795                   "create_disposition = 0x%x create_options = 0x%x "
3796                   "oplock_request = 0x%x "
3797                   "private_flags = 0x%x "
3798                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3799                   "fname = %s\n",
3800                   (unsigned int)access_mask,
3801                   (unsigned int)file_attributes,
3802                   (unsigned int)share_access,
3803                   (unsigned int)create_disposition,
3804                   (unsigned int)create_options,
3805                   (unsigned int)oplock_request,
3806                   (unsigned int)private_flags,
3807                   (unsigned int)root_dir_fid,
3808                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3809
3810         /*
3811          * Calculate the filename from the root_dir_if if necessary.
3812          */
3813
3814         if (root_dir_fid != 0) {
3815                 struct smb_filename *smb_fname_out = NULL;
3816                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3817                                                    smb_fname, &smb_fname_out);
3818                 if (!NT_STATUS_IS_OK(status)) {
3819                         goto fail;
3820                 }
3821                 smb_fname = smb_fname_out;
3822         }
3823
3824         /*
3825          * Check to see if this is a mac fork of some kind.
3826          */
3827
3828         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3829         if (stream_name) {
3830                 enum FAKE_FILE_TYPE fake_file_type;
3831
3832                 fake_file_type = is_fake_file(smb_fname);
3833
3834                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3835
3836                         /*
3837                          * Here we go! support for changing the disk quotas
3838                          * --metze
3839                          *
3840                          * We need to fake up to open this MAGIC QUOTA file
3841                          * and return a valid FID.
3842                          *
3843                          * w2k close this file directly after openening xp
3844                          * also tries a QUERY_FILE_INFO on the file and then
3845                          * close it
3846                          */
3847                         status = open_fake_file(req, conn, req->vuid,
3848                                                 fake_file_type, smb_fname,
3849                                                 access_mask, &fsp);
3850                         if (!NT_STATUS_IS_OK(status)) {
3851                                 goto fail;
3852                         }
3853
3854                         ZERO_STRUCT(smb_fname->st);
3855                         goto done;
3856                 }
3857
3858                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3859                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3860                         goto fail;
3861                 }
3862         }
3863
3864         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3865                 int ret;
3866                 smb_fname->stream_name = NULL;
3867                 /* We have to handle this error here. */
3868                 if (create_options & FILE_DIRECTORY_FILE) {
3869                         status = NT_STATUS_NOT_A_DIRECTORY;
3870                         goto fail;
3871                 }
3872                 if (lp_posix_pathnames()) {
3873                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3874                 } else {
3875                         ret = SMB_VFS_STAT(conn, smb_fname);
3876                 }
3877
3878                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3879                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3880                         goto fail;
3881                 }
3882         }
3883
3884         status = create_file_unixpath(
3885                 conn, req, smb_fname, access_mask, share_access,
3886                 create_disposition, create_options, file_attributes,
3887                 oplock_request, allocation_size, private_flags,
3888                 sd, ea_list,
3889                 &fsp, &info);
3890
3891         if (!NT_STATUS_IS_OK(status)) {
3892                 goto fail;
3893         }
3894
3895  done:
3896         DEBUG(10, ("create_file: info=%d\n", info));
3897
3898         *result = fsp;
3899         if (pinfo != NULL) {
3900                 *pinfo = info;
3901         }
3902         return NT_STATUS_OK;
3903
3904  fail:
3905         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3906
3907         if (fsp != NULL) {
3908                 close_file(req, fsp, ERROR_CLOSE);
3909                 fsp = NULL;
3910         }
3911         return status;
3912 }