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 = 0;
  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         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 103                         (SECINFO_OWNER |
 104                         SECINFO_GROUP |
 105                         SECINFO_DACL),&sd);
 106
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 109                         "on %s: %s\n",
 110                         smb_fname_str_dbg(smb_fname),
 111                         nt_errstr(status)));
 112                 return status;
 113         }
 114
 115         /*
 116          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 117          * owner WRITE_DAC and READ_CONTROL.
 118          */
 119         status = se_access_check(sd,
 120                                 get_current_nttok(conn),
 121                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 122                                 &rejected_mask);
 123
 124         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 125                 "0x%x returning 0x%x (%s)\n",
 126                 smb_fname_str_dbg(smb_fname),
 127                 (unsigned int)access_mask,
 128                 (unsigned int)rejected_mask,
 129                 nt_errstr(status) ));
 130
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 if (DEBUGLEVEL >= 10) {
 133                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 134                                 smb_fname_str_dbg(smb_fname) ));
 135                         NDR_PRINT_DEBUG(security_descriptor, sd);
 136                 }
 137         }
 138
 139         TALLOC_FREE(sd);
 140
 141         if (NT_STATUS_IS_OK(status) ||
 142                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 143                 return status;
 144         }
 145
 146         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 147         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 148                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 149                         (lp_map_readonly(SNUM(conn)) ||
 150                         lp_map_archive(SNUM(conn)) ||
 151                         lp_map_hidden(SNUM(conn)) ||
 152                         lp_map_system(SNUM(conn)))) {
 153                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 154
 155                 DEBUG(10,("smbd_check_access_rights: "
 156                         "overrode "
 157                         "FILE_WRITE_ATTRIBUTES "
 158                         "on file %s\n",
 159                         smb_fname_str_dbg(smb_fname)));
 160         }
 161
 162         if (parent_override_delete(conn,
 163                                 smb_fname,
 164                                 access_mask,
 165                                 rejected_mask)) {
 166                 /* Were we trying to do an open
 167                  * for delete and didn't get DELETE
 168                  * access (only) ? Check if the
 169                  * directory allows DELETE_CHILD.
 170                  * See here:
 171                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 172                  * for details. */
 173
 174                 rejected_mask &= ~DELETE_ACCESS;
 175
 176                 DEBUG(10,("smbd_check_access_rights: "
 177                         "overrode "
 178                         "DELETE_ACCESS on "
 179                         "file %s\n",
 180                         smb_fname_str_dbg(smb_fname)));
 181         }
 182
 183         if (rejected_mask != 0) {
 184                 return NT_STATUS_ACCESS_DENIED;
 185         } else {
 186                 return NT_STATUS_OK;
 187         }
 188 }
 189
 190 static NTSTATUS check_parent_access(struct connection_struct *conn,
 191                                 struct smb_filename *smb_fname,
 192                                 uint32_t access_mask,
 193                                 char **pp_parent_dir)
 194 {
 195         NTSTATUS status;
 196         char *parent_dir = NULL;
 197         struct security_descriptor *parent_sd = NULL;
 198         uint32_t access_granted = 0;
 199
 200         if (!parent_dirname(talloc_tos(),
 201                                 smb_fname->base_name,
 202                                 &parent_dir,
 203                                 NULL)) {
 204                 return NT_STATUS_NO_MEMORY;
 205         }
 206
 207         if (pp_parent_dir) {
 208                 *pp_parent_dir = parent_dir;
 209         }
 210
 211         if (get_current_uid(conn) == (uid_t)0) {
 212                 /* I'm sorry sir, I didn't know you were root... */
 213                 DEBUG(10,("check_parent_access: root override "
 214                         "on %s. Granting 0x%x\n",
 215                         smb_fname_str_dbg(smb_fname),
 216                         (unsigned int)access_mask ));
 217                 return NT_STATUS_OK;
 218         }
 219
 220         status = SMB_VFS_GET_NT_ACL(conn,
 221                                 parent_dir,
 222                                 SECINFO_DACL,
 223                                 &parent_sd);
 224
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 227                         "%s with error %s\n",
 228                         parent_dir,
 229                         nt_errstr(status)));
 230                 return status;
 231         }
 232
 233         /*
 234          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 235          * owner WRITE_DAC and READ_CONTROL.
 236          */
 237         status = se_access_check(parent_sd,
 238                                 get_current_nttok(conn),
 239                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 240                                 &access_granted);
 241         if(!NT_STATUS_IS_OK(status)) {
 242                 DEBUG(5,("check_parent_access: access check "
 243                         "on directory %s for "
 244                         "path %s for mask 0x%x returned (0x%x) %s\n",
 245                         parent_dir,
 246                         smb_fname->base_name,
 247                         access_mask,
 248                         access_granted,
 249                         nt_errstr(status) ));
 250                 return status;
 251         }
 252
 253         return NT_STATUS_OK;
 254 }
 255
 256 /****************************************************************************
 257  fd support routines - attempt to do a dos_open.
 258 ****************************************************************************/
 259
 260 static NTSTATUS fd_open(struct connection_struct *conn,
 261                     files_struct *fsp,
 262                     int flags,
 263                     mode_t mode)
 264 {
 265         struct smb_filename *smb_fname = fsp->fsp_name;
 266         NTSTATUS status = NT_STATUS_OK;
 267
 268 #ifdef O_NOFOLLOW
 269         /*
 270          * Never follow symlinks on a POSIX client. The
 271          * client should be doing this.
 272          */
 273
 274         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 275                 flags |= O_NOFOLLOW;
 276         }
 277 #endif
 278
 279         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 280         if (fsp->fh->fd == -1) {
 281                 status = map_nt_error_from_unix(errno);
 282                 if (errno == EMFILE) {
 283                         static time_t last_warned = 0L;
 284
 285                         if (time((time_t *) NULL) > last_warned) {
 286                                 DEBUG(0,("Too many open files, unable "
 287                                         "to open more!  smbd's max "
 288                                         "open files = %d\n",
 289                                         lp_max_open_files()));
 290                                 last_warned = time((time_t *) NULL);
 291                         }
 292                 }
 293
 294         }
 295
 296         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 297                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 298                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 299
 300         return status;
 301 }
 302
 303 /****************************************************************************
 304  Close the file associated with a fsp.
 305 ****************************************************************************/
 306
 307 NTSTATUS fd_close(files_struct *fsp)
 308 {
 309         int ret;
 310
 311         if (fsp->dptr) {
 312                 dptr_CloseDir(fsp);
 313         }
 314         if (fsp->fh->fd == -1) {
 315                 return NT_STATUS_OK; /* What we used to call a stat open. */
 316         }
 317         if (fsp->fh->ref_count > 1) {
 318                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 319         }
 320
 321         ret = SMB_VFS_CLOSE(fsp);
 322         fsp->fh->fd = -1;
 323         if (ret == -1) {
 324                 return map_nt_error_from_unix(errno);
 325         }
 326         return NT_STATUS_OK;
 327 }
 328
 329 /****************************************************************************
 330  Change the ownership of a file to that of the parent directory.
 331  Do this by fd if possible.
 332 ****************************************************************************/
 333
 334 void change_file_owner_to_parent(connection_struct *conn,
 335                                         const char *inherit_from_dir,
 336                                         files_struct *fsp)
 337 {
 338         struct smb_filename *smb_fname_parent = NULL;
 339         NTSTATUS status;
 340         int ret;
 341
 342         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 343                                             NULL, NULL, &smb_fname_parent);
 344         if (!NT_STATUS_IS_OK(status)) {
 345                 return;
 346         }
 347
 348         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 349         if (ret == -1) {
 350                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 351                          "directory %s. Error was %s\n",
 352                          smb_fname_str_dbg(smb_fname_parent),
 353                          strerror(errno)));
 354                 TALLOC_FREE(smb_fname_parent);
 355                 return;
 356         }
 357
 358         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 359                 /* Already this uid - no need to change. */
 360                 DEBUG(10,("change_file_owner_to_parent: file %s "
 361                         "is already owned by uid %d\n",
 362                         fsp_str_dbg(fsp),
 363                         (int)fsp->fsp_name->st.st_ex_uid ));
 364                 TALLOC_FREE(smb_fname_parent);
 365                 return;
 366         }
 367
 368         become_root();
 369         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 370         unbecome_root();
 371         if (ret == -1) {
 372                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 373                          "file %s to parent directory uid %u. Error "
 374                          "was %s\n", fsp_str_dbg(fsp),
 375                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 376                          strerror(errno) ));
 377         } else {
 378                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 379                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 380                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 381                 /* Ensure the uid entry is updated. */
 382                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 383         }
 384
 385         TALLOC_FREE(smb_fname_parent);
 386 }
 387
 388 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 389                                        const char *inherit_from_dir,
 390                                        const char *fname,
 391                                        SMB_STRUCT_STAT *psbuf)
 392 {
 393         struct smb_filename *smb_fname_parent = NULL;
 394         struct smb_filename *smb_fname_cwd = NULL;
 395         char *saved_dir = NULL;
 396         TALLOC_CTX *ctx = talloc_tos();
 397         NTSTATUS status = NT_STATUS_OK;
 398         int ret;
 399
 400         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 401                                             &smb_fname_parent);
 402         if (!NT_STATUS_IS_OK(status)) {
 403                 return status;
 404         }
 405
 406         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 407         if (ret == -1) {
 408                 status = map_nt_error_from_unix(errno);
 409                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 410                          "directory %s. Error was %s\n",
 411                          smb_fname_str_dbg(smb_fname_parent),
 412                          strerror(errno)));
 413                 goto out;
 414         }
 415
 416         /* We've already done an lstat into psbuf, and we know it's a
 417            directory. If we can cd into the directory and the dev/ino
 418            are the same then we can safely chown without races as
 419            we're locking the directory in place by being in it.  This
 420            should work on any UNIX (thanks tridge :-). JRA.
 421         */
 422
 423         saved_dir = vfs_GetWd(ctx,conn);
 424         if (!saved_dir) {
 425                 status = map_nt_error_from_unix(errno);
 426                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 427                          "current working directory. Error was %s\n",
 428                          strerror(errno)));
 429                 goto out;
 430         }
 431
 432         /* Chdir into the new path. */
 433         if (vfs_ChDir(conn, fname) == -1) {
 434                 status = map_nt_error_from_unix(errno);
 435                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 436                          "current working directory to %s. Error "
 437                          "was %s\n", fname, strerror(errno) ));
 438                 goto chdir;
 439         }
 440
 441         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 442                                             &smb_fname_cwd);
 443         if (!NT_STATUS_IS_OK(status)) {
 444                 return status;
 445         }
 446
 447         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 448         if (ret == -1) {
 449                 status = map_nt_error_from_unix(errno);
 450                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 451                          "directory '.' (%s) Error was %s\n",
 452                          fname, strerror(errno)));
 453                 goto chdir;
 454         }
 455
 456         /* Ensure we're pointing at the same place. */
 457         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 458             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 459                 DEBUG(0,("change_dir_owner_to_parent: "
 460                          "device/inode on directory %s changed. "
 461                          "Refusing to chown !\n", fname ));
 462                 status = NT_STATUS_ACCESS_DENIED;
 463                 goto chdir;
 464         }
 465
 466         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 467                 /* Already this uid - no need to change. */
 468                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 469                         "is already owned by uid %d\n",
 470                         fname,
 471                         (int)smb_fname_cwd->st.st_ex_uid ));
 472                 status = NT_STATUS_OK;
 473                 goto chdir;
 474         }
 475
 476         become_root();
 477         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 478                             (gid_t)-1);
 479         unbecome_root();
 480         if (ret == -1) {
 481                 status = map_nt_error_from_unix(errno);
 482                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 483                           "directory %s to parent directory uid %u. "
 484                           "Error was %s\n", fname,
 485                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 486                           strerror(errno) ));
 487         } else {
 488                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 489                         "directory %s to parent directory uid %u.\n",
 490                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 491                 /* Ensure the uid entry is updated. */
 492                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 493         }
 494
 495  chdir:
 496         vfs_ChDir(conn,saved_dir);
 497  out:
 498         TALLOC_FREE(smb_fname_parent);
 499         TALLOC_FREE(smb_fname_cwd);
 500         return status;
 501 }
 502
 503 /****************************************************************************
 504  Open a file.
 505 ****************************************************************************/
 506
 507 static NTSTATUS open_file(files_struct *fsp,
 508                           connection_struct *conn,
 509                           struct smb_request *req,
 510                           const char *parent_dir,
 511                           int flags,
 512                           mode_t unx_mode,
 513                           uint32 access_mask, /* client requested access mask. */
 514                           uint32 open_access_mask) /* what we're actually using in the open. */
 515 {
 516         struct smb_filename *smb_fname = fsp->fsp_name;
 517         NTSTATUS status = NT_STATUS_OK;
 518         int accmode = (flags & O_ACCMODE);
 519         int local_flags = flags;
 520         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 521         bool file_created = false;
 522
 523         fsp->fh->fd = -1;
 524         errno = EPERM;
 525
 526         /* Check permissions */
 527
 528         /*
 529          * This code was changed after seeing a client open request
 530          * containing the open mode of (DENY_WRITE/read-only) with
 531          * the 'create if not exist' bit set. The previous code
 532          * would fail to open the file read only on a read-only share
 533          * as it was checking the flags parameter  directly against O_RDONLY,
 534          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 535          * JRA.
 536          */
 537
 538         if (!CAN_WRITE(conn)) {
 539                 /* It's a read-only share - fail if we wanted to write. */
 540                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 541                         DEBUG(3,("Permission denied opening %s\n",
 542                                  smb_fname_str_dbg(smb_fname)));
 543                         return NT_STATUS_ACCESS_DENIED;
 544                 } else if(flags & O_CREAT) {
 545                         /* We don't want to write - but we must make sure that
 546                            O_CREAT doesn't create the file if we have write
 547                            access into the directory.
 548                         */
 549                         flags &= ~(O_CREAT|O_EXCL);
 550                         local_flags &= ~(O_CREAT|O_EXCL);
 551                 }
 552         }
 553
 554         /*
 555          * This little piece of insanity is inspired by the
 556          * fact that an NT client can open a file for O_RDONLY,
 557          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 558          * If the client *can* write to the file, then it expects to
 559          * truncate the file, even though it is opening for readonly.
 560          * Quicken uses this stupid trick in backup file creation...
 561          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 562          * for helping track this one down. It didn't bite us in 2.0.x
 563          * as we always opened files read-write in that release. JRA.
 564          */
 565
 566         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 567                 DEBUG(10,("open_file: truncate requested on read-only open "
 568                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 569                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 570         }
 571
 572         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 573             (!file_existed && (local_flags & O_CREAT)) ||
 574             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 575                 const char *wild;
 576
 577                 /*
 578                  * We can't actually truncate here as the file may be locked.
 579                  * open_file_ntcreate will take care of the truncate later. JRA.
 580                  */
 581
 582                 local_flags &= ~O_TRUNC;
 583
 584 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 585                 /*
 586                  * We would block on opening a FIFO with no one else on the
 587                  * other end. Do what we used to do and add O_NONBLOCK to the
 588                  * open flags. JRA.
 589                  */
 590
 591                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 592                         local_flags |= O_NONBLOCK;
 593                 }
 594 #endif
 595
 596                 /* Don't create files with Microsoft wildcard characters. */
 597                 if (fsp->base_fsp) {
 598                         /*
 599                          * wildcard characters are allowed in stream names
 600                          * only test the basefilename
 601                          */
 602                         wild = fsp->base_fsp->fsp_name->base_name;
 603                 } else {
 604                         wild = smb_fname->base_name;
 605                 }
 606                 if ((local_flags & O_CREAT) && !file_existed &&
 607                     ms_has_wild(wild))  {
 608                         return NT_STATUS_OBJECT_NAME_INVALID;
 609                 }
 610
 611                 /* Can we access this file ? */
 612                 if (!fsp->base_fsp) {
 613                         /* Only do this check on non-stream open. */
 614                         if (file_existed) {
 615                                 status = smbd_check_access_rights(conn,
 616                                                 smb_fname,
 617                                                 access_mask);
 618                         } else if (local_flags & O_CREAT){
 619                                 status = check_parent_access(conn,
 620                                                 smb_fname,
 621                                                 SEC_DIR_ADD_FILE,
 622                                                 NULL);
 623                         } else {
 624                                 /* File didn't exist and no O_CREAT. */
 625                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 626                         }
 627                         if (!NT_STATUS_IS_OK(status)) {
 628                                 DEBUG(10,("open_file: "
 629                                         "%s on file "
 630                                         "%s returned %s\n",
 631                                         file_existed ?
 632                                                 "smbd_check_access_rights" :
 633                                                 "check_parent_access",
 634                                         smb_fname_str_dbg(smb_fname),
 635                                         nt_errstr(status) ));
 636                                 return status;
 637                         }
 638                 }
 639
 640                 /* Actually do the open */
 641                 status = fd_open(conn, fsp, local_flags, unx_mode);
 642                 if (!NT_STATUS_IS_OK(status)) {
 643                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 644                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 645                                  nt_errstr(status),local_flags,flags));
 646                         return status;
 647                 }
 648
 649                 if ((local_flags & O_CREAT) && !file_existed) {
 650                         file_created = true;
 651                 }
 652
 653         } else {
 654                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 655                 if (!file_existed) {
 656                         /* File must exist for a stat open. */
 657                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 658                 }
 659
 660                 status = smbd_check_access_rights(conn,
 661                                 smb_fname,
 662                                 access_mask);
 663
 664                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 665                                 fsp->posix_open &&
 666                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 667                         /* This is a POSIX stat open for delete
 668                          * or rename on a symlink that points
 669                          * nowhere. Allow. */
 670                         DEBUG(10,("open_file: allowing POSIX "
 671                                   "open on bad symlink %s\n",
 672                                   smb_fname_str_dbg(smb_fname)));
 673                         status = NT_STATUS_OK;
 674                 }
 675
 676                 if (!NT_STATUS_IS_OK(status)) {
 677                         DEBUG(10,("open_file: "
 678                                 "smbd_check_access_rights on file "
 679                                 "%s returned %s\n",
 680                                 smb_fname_str_dbg(smb_fname),
 681                                 nt_errstr(status) ));
 682                         return status;
 683                 }
 684         }
 685
 686         if (!file_existed) {
 687                 int ret;
 688
 689                 if (fsp->fh->fd == -1) {
 690                         ret = SMB_VFS_STAT(conn, smb_fname);
 691                 } else {
 692                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 693                         /* If we have an fd, this stat should succeed. */
 694                         if (ret == -1) {
 695                                 DEBUG(0,("Error doing fstat on open file %s "
 696                                          "(%s)\n",
 697                                          smb_fname_str_dbg(smb_fname),
 698                                          strerror(errno) ));
 699                         }
 700                 }
 701
 702                 /* For a non-io open, this stat failing means file not found. JRA */
 703                 if (ret == -1) {
 704                         status = map_nt_error_from_unix(errno);
 705                         fd_close(fsp);
 706                         return status;
 707                 }
 708
 709                 if (file_created) {
 710                         bool need_re_stat = false;
 711                         /* Do all inheritance work after we've
 712                            done a successful stat call and filled
 713                            in the stat struct in fsp->fsp_name. */
 714
 715                         /* Inherit the ACL if required */
 716                         if (lp_inherit_perms(SNUM(conn))) {
 717                                 inherit_access_posix_acl(conn, parent_dir,
 718                                                          smb_fname->base_name,
 719                                                          unx_mode);
 720                                 need_re_stat = true;
 721                         }
 722
 723                         /* Change the owner if required. */
 724                         if (lp_inherit_owner(SNUM(conn))) {
 725                                 change_file_owner_to_parent(conn, parent_dir,
 726                                                             fsp);
 727                                 need_re_stat = true;
 728                         }
 729
 730                         if (need_re_stat) {
 731                                 if (fsp->fh->fd == -1) {
 732                                         ret = SMB_VFS_STAT(conn, smb_fname);
 733                                 } else {
 734                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 735                                         /* If we have an fd, this stat should succeed. */
 736                                         if (ret == -1) {
 737                                                 DEBUG(0,("Error doing fstat on open file %s "
 738                                                          "(%s)\n",
 739                                                          smb_fname_str_dbg(smb_fname),
 740                                                          strerror(errno) ));
 741                                         }
 742                                 }
 743                         }
 744
 745                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 746                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 747                                      smb_fname->base_name);
 748                 }
 749         }
 750
 751         /*
 752          * POSIX allows read-only opens of directories. We don't
 753          * want to do this (we use a different code path for this)
 754          * so catch a directory open and return an EISDIR. JRA.
 755          */
 756
 757         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 758                 fd_close(fsp);
 759                 errno = EISDIR;
 760                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 761         }
 762
 763         fsp->mode = smb_fname->st.st_ex_mode;
 764         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 765         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 766         fsp->file_pid = req ? req->smbpid : 0;
 767         fsp->can_lock = True;
 768         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 769         if (!CAN_WRITE(conn)) {
 770                 fsp->can_write = False;
 771         } else {
 772                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 773                         True : False;
 774         }
 775         fsp->print_file = NULL;
 776         fsp->modified = False;
 777         fsp->sent_oplock_break = NO_BREAK_SENT;
 778         fsp->is_directory = False;
 779         if (conn->aio_write_behind_list &&
 780             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 781                        conn->case_sensitive)) {
 782                 fsp->aio_write_behind = True;
 783         }
 784
 785         fsp->wcp = NULL; /* Write cache pointer. */
 786
 787         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 788                  conn->session_info->unix_info->unix_name,
 789                  smb_fname_str_dbg(smb_fname),
 790                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 791                  conn->num_files_open));
 792
 793         errno = 0;
 794         return NT_STATUS_OK;
 795 }
 796
 797 /****************************************************************************
 798  Check if we can open a file with a share mode.
 799  Returns True if conflict, False if not.
 800 ****************************************************************************/
 801
 802 static bool share_conflict(struct share_mode_entry *entry,
 803                            uint32 access_mask,
 804                            uint32 share_access)
 805 {
 806         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 807                   "entry->share_access = 0x%x, "
 808                   "entry->private_options = 0x%x\n",
 809                   (unsigned int)entry->access_mask,
 810                   (unsigned int)entry->share_access,
 811                   (unsigned int)entry->private_options));
 812
 813         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 814                   (unsigned int)access_mask, (unsigned int)share_access));
 815
 816         if ((entry->access_mask & (FILE_WRITE_DATA|
 817                                    FILE_APPEND_DATA|
 818                                    FILE_READ_DATA|
 819                                    FILE_EXECUTE|
 820                                    DELETE_ACCESS)) == 0) {
 821                 DEBUG(10,("share_conflict: No conflict due to "
 822                           "entry->access_mask = 0x%x\n",
 823                           (unsigned int)entry->access_mask ));
 824                 return False;
 825         }
 826
 827         if ((access_mask & (FILE_WRITE_DATA|
 828                             FILE_APPEND_DATA|
 829                             FILE_READ_DATA|
 830                             FILE_EXECUTE|
 831                             DELETE_ACCESS)) == 0) {
 832                 DEBUG(10,("share_conflict: No conflict due to "
 833                           "access_mask = 0x%x\n",
 834                           (unsigned int)access_mask ));
 835                 return False;
 836         }
 837
 838 #if 1 /* JRA TEST - Superdebug. */
 839 #define CHECK_MASK(num, am, right, sa, share) \
 840         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 841                 (unsigned int)(num), (unsigned int)(am), \
 842                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 843         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 844                 (unsigned int)(num), (unsigned int)(sa), \
 845                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 846         if (((am) & (right)) && !((sa) & (share))) { \
 847                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 848 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 849                         (unsigned int)(share) )); \
 850                 return True; \
 851         }
 852 #else
 853 #define CHECK_MASK(num, am, right, sa, share) \
 854         if (((am) & (right)) && !((sa) & (share))) { \
 855                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 857                         (unsigned int)(share) )); \
 858                 return True; \
 859         }
 860 #endif
 861
 862         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 863                    share_access, FILE_SHARE_WRITE);
 864         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 865                    entry->share_access, FILE_SHARE_WRITE);
 866
 867         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 868                    share_access, FILE_SHARE_READ);
 869         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 870                    entry->share_access, FILE_SHARE_READ);
 871
 872         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 873                    share_access, FILE_SHARE_DELETE);
 874         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 875                    entry->share_access, FILE_SHARE_DELETE);
 876
 877         DEBUG(10,("share_conflict: No conflict.\n"));
 878         return False;
 879 }
 880
 881 #if defined(DEVELOPER)
 882 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 883                                       int num,
 884                                       struct share_mode_entry *share_entry)
 885 {
 886         files_struct *fsp;
 887
 888         if (!procid_is_me(&share_entry->pid)) {
 889                 return;
 890         }
 891
 892         if (is_deferred_open_entry(share_entry) &&
 893             !open_was_deferred(sconn, share_entry->op_mid)) {
 894                 char *str = talloc_asprintf(talloc_tos(),
 895                         "Got a deferred entry without a request: "
 896                         "PANIC: %s\n",
 897                         share_mode_str(talloc_tos(), num, share_entry));
 898                 smb_panic(str);
 899         }
 900
 901         if (!is_valid_share_mode_entry(share_entry)) {
 902                 return;
 903         }
 904
 905         fsp = file_find_dif(sconn, share_entry->id,
 906                             share_entry->share_file_id);
 907         if (!fsp) {
 908                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 909                          share_mode_str(talloc_tos(), num, share_entry) ));
 910                 smb_panic("validate_my_share_entries: Cannot match a "
 911                           "share entry with an open file\n");
 912         }
 913
 914         if (is_deferred_open_entry(share_entry)) {
 915                 goto panic;
 916         }
 917
 918         if ((share_entry->op_type == NO_OPLOCK) &&
 919             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 920                 /* Someone has already written to it, but I haven't yet
 921                  * noticed */
 922                 return;
 923         }
 924
 925         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 926                 goto panic;
 927         }
 928
 929         return;
 930
 931  panic:
 932         {
 933                 char *str;
 934                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 935                          share_mode_str(talloc_tos(), num, share_entry) ));
 936                 str = talloc_asprintf(talloc_tos(),
 937                         "validate_my_share_entries: "
 938                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 939                          fsp->fsp_name->base_name,
 940                          (unsigned int)fsp->oplock_type,
 941                          (unsigned int)share_entry->op_type );
 942                 smb_panic(str);
 943         }
 944 }
 945 #endif
 946
 947 bool is_stat_open(uint32 access_mask)
 948 {
 949         return (access_mask &&
 950                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 951                                   FILE_WRITE_ATTRIBUTES))==0) &&
 952                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 953                                  FILE_WRITE_ATTRIBUTES)) != 0));
 954 }
 955
 956 /****************************************************************************
 957  Deal with share modes
 958  Invarient: Share mode must be locked on entry and exit.
 959  Returns -1 on error, or number of share modes on success (may be zero).
 960 ****************************************************************************/
 961
 962 static NTSTATUS open_mode_check(connection_struct *conn,
 963                                 struct share_mode_lock *lck,
 964                                 uint32_t name_hash,
 965                                 uint32 access_mask,
 966                                 uint32 share_access,
 967                                 uint32 create_options,
 968                                 bool *file_existed)
 969 {
 970         int i;
 971
 972         if(lck->num_share_modes == 0) {
 973                 return NT_STATUS_OK;
 974         }
 975
 976         *file_existed = True;
 977
 978         /* A delete on close prohibits everything */
 979
 980         if (is_delete_on_close_set(lck, name_hash)) {
 981                 return NT_STATUS_DELETE_PENDING;
 982         }
 983
 984         if (is_stat_open(access_mask)) {
 985                 /* Stat open that doesn't trigger oplock breaks or share mode
 986                  * checks... ! JRA. */
 987                 return NT_STATUS_OK;
 988         }
 989
 990         /*
 991          * Check if the share modes will give us access.
 992          */
 993
 994 #if defined(DEVELOPER)
 995         for(i = 0; i < lck->num_share_modes; i++) {
 996                 validate_my_share_entries(conn->sconn, i,
 997                                           &lck->share_modes[i]);
 998         }
 999 #endif
1000
1001         if (!lp_share_modes(SNUM(conn))) {
1002                 return NT_STATUS_OK;
1003         }
1004
1005         /* Now we check the share modes, after any oplock breaks. */
1006         for(i = 0; i < lck->num_share_modes; i++) {
1007
1008                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1009                         continue;
1010                 }
1011
1012                 /* someone else has a share lock on it, check to see if we can
1013                  * too */
1014                 if (share_conflict(&lck->share_modes[i],
1015                                    access_mask, share_access)) {
1016                         return NT_STATUS_SHARING_VIOLATION;
1017                 }
1018         }
1019
1020         return NT_STATUS_OK;
1021 }
1022
1023 static bool is_delete_request(files_struct *fsp) {
1024         return ((fsp->access_mask == DELETE_ACCESS) &&
1025                 (fsp->oplock_type == NO_OPLOCK));
1026 }
1027
1028 /*
1029  * Send a break message to the oplock holder and delay the open for
1030  * our client.
1031  */
1032
1033 static NTSTATUS send_break_message(files_struct *fsp,
1034                                         struct share_mode_entry *exclusive,
1035                                         uint64_t mid,
1036                                         int oplock_request)
1037 {
1038         NTSTATUS status;
1039         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1040
1041         DEBUG(10, ("Sending break request to PID %s\n",
1042                    procid_str_static(&exclusive->pid)));
1043         exclusive->op_mid = mid;
1044
1045         /* Create the message. */
1046         share_mode_entry_to_message(msg, exclusive);
1047
1048         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1049            don't want this set in the share mode struct pointed to by lck. */
1050
1051         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1052                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1053                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1054         }
1055
1056         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1057                                     MSG_SMB_BREAK_REQUEST,
1058                                     (uint8 *)msg,
1059                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1060         if (!NT_STATUS_IS_OK(status)) {
1061                 DEBUG(3, ("Could not send oplock break message: %s\n",
1062                           nt_errstr(status)));
1063         }
1064
1065         return status;
1066 }
1067
1068 /*
1069  * Return share_mode_entry pointers for :
1070  * 1). Batch oplock entry.
1071  * 2). Batch or exclusive oplock entry (may be identical to #1).
1072  * bool have_level2_oplock
1073  * bool have_no_oplock.
1074  * Do internal consistency checks on the share mode for a file.
1075  */
1076
1077 static void find_oplock_types(files_struct *fsp,
1078                                 int oplock_request,
1079                                 struct share_mode_lock *lck,
1080                                 struct share_mode_entry **pp_batch,
1081                                 struct share_mode_entry **pp_ex_or_batch,
1082                                 bool *got_level2,
1083                                 bool *got_no_oplock)
1084 {
1085         int i;
1086
1087         *pp_batch = NULL;
1088         *pp_ex_or_batch = NULL;
1089         *got_level2 = false;
1090         *got_no_oplock = false;
1091
1092         /* Ignore stat or internal opens, as is done in
1093                 delay_for_batch_oplocks() and
1094                 delay_for_exclusive_oplocks().
1095          */
1096         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1097                 return;
1098         }
1099
1100         for (i=0; i<lck->num_share_modes; i++) {
1101                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1102                         continue;
1103                 }
1104
1105                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1106                                 is_stat_open(lck->share_modes[i].access_mask)) {
1107                         /* We ignore stat opens in the table - they
1108                            always have NO_OPLOCK and never get or
1109                            cause breaks. JRA. */
1110                         continue;
1111                 }
1112
1113                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114                         /* batch - can only be one. */
1115                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1116                                 smb_panic("Bad batch oplock entry.");
1117                         }
1118                         *pp_batch = &lck->share_modes[i];
1119                 }
1120
1121                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122                         /* Exclusive or batch - can only be one. */
1123                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1124                                 smb_panic("Bad exclusive or batch oplock entry.");
1125                         }
1126                         *pp_ex_or_batch = &lck->share_modes[i];
1127                 }
1128
1129                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130                         if (*pp_batch || *pp_ex_or_batch) {
1131                                 smb_panic("Bad levelII oplock entry.");
1132                         }
1133                         *got_level2 = true;
1134                 }
1135
1136                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1137                         if (*pp_batch || *pp_ex_or_batch) {
1138                                 smb_panic("Bad no oplock entry.");
1139                         }
1140                         *got_no_oplock = true;
1141                 }
1142         }
1143 }
1144
1145 static bool delay_for_batch_oplocks(files_struct *fsp,
1146                                         uint64_t mid,
1147                                         int oplock_request,
1148                                         struct share_mode_entry *batch_entry)
1149 {
1150         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1151                 return false;
1152         }
1153
1154         if (batch_entry != NULL) {
1155                 /* Found a batch oplock */
1156                 send_break_message(fsp, batch_entry, mid, oplock_request);
1157                 return true;
1158         }
1159         return false;
1160 }
1161
1162 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1163                                         uint64_t mid,
1164                                         int oplock_request,
1165                                         struct share_mode_entry *ex_entry)
1166 {
1167         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1168                 return false;
1169         }
1170
1171         if (ex_entry != NULL) {
1172                 /* Found an exclusive or batch oplock */
1173                 bool delay_it = is_delete_request(fsp) ?
1174                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1175                 if (delay_it) {
1176                         send_break_message(fsp, ex_entry, mid, oplock_request);
1177                         return true;
1178                 }
1179         }
1180         return false;
1181 }
1182
1183 static void grant_fsp_oplock_type(files_struct *fsp,
1184                                 const struct byte_range_lock *br_lck,
1185                                 int oplock_request,
1186                                 bool got_level2_oplock,
1187                                 bool got_a_none_oplock)
1188 {
1189         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1190                             lp_level2_oplocks(SNUM(fsp->conn));
1191
1192         /* Start by granting what the client asked for,
1193            but ensure no SAMBA_PRIVATE bits can be set. */
1194         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1195
1196         if (oplock_request & INTERNAL_OPEN_ONLY) {
1197                 /* No oplocks on internal open. */
1198                 fsp->oplock_type = NO_OPLOCK;
1199                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1200                         fsp->oplock_type, fsp_str_dbg(fsp)));
1201                 return;
1202         } else if (br_lck && br_lck->num_locks > 0) {
1203                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1204                         fsp_str_dbg(fsp)));
1205                 fsp->oplock_type = NO_OPLOCK;
1206         }
1207
1208         if (is_stat_open(fsp->access_mask)) {
1209                 /* Leave the value already set. */
1210                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1211                         fsp->oplock_type, fsp_str_dbg(fsp)));
1212                 return;
1213         }
1214
1215         /*
1216          * Match what was requested (fsp->oplock_type) with
1217          * what was found in the existing share modes.
1218          */
1219
1220         if (got_a_none_oplock) {
1221                 fsp->oplock_type = NO_OPLOCK;
1222         } else if (got_level2_oplock) {
1223                 if (fsp->oplock_type == NO_OPLOCK ||
1224                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1225                         /* Store a level2 oplock, but don't tell the client */
1226                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1227                 } else {
1228                         fsp->oplock_type = LEVEL_II_OPLOCK;
1229                 }
1230         } else {
1231                 /* All share_mode_entries are placeholders or deferred.
1232                  * Silently upgrade to fake levelII if the client didn't
1233                  * ask for an oplock. */
1234                 if (fsp->oplock_type == NO_OPLOCK) {
1235                         /* Store a level2 oplock, but don't tell the client */
1236                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1237                 }
1238         }
1239
1240         /*
1241          * Don't grant level2 to clients that don't want them
1242          * or if we've turned them off.
1243          */
1244         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1245                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1246         }
1247
1248         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1249                   fsp->oplock_type, fsp_str_dbg(fsp)));
1250 }
1251
1252 bool request_timed_out(struct timeval request_time,
1253                        struct timeval timeout)
1254 {
1255         struct timeval now, end_time;
1256         GetTimeOfDay(&now);
1257         end_time = timeval_sum(&request_time, &timeout);
1258         return (timeval_compare(&end_time, &now) < 0);
1259 }
1260
1261 /****************************************************************************
1262  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1263 ****************************************************************************/
1264
1265 static void defer_open(struct share_mode_lock *lck,
1266                        struct timeval request_time,
1267                        struct timeval timeout,
1268                        struct smb_request *req,
1269                        struct deferred_open_record *state)
1270 {
1271         int i;
1272
1273         /* Paranoia check */
1274
1275         for (i=0; i<lck->num_share_modes; i++) {
1276                 struct share_mode_entry *e = &lck->share_modes[i];
1277
1278                 if (is_deferred_open_entry(e) &&
1279                     procid_is_me(&e->pid) &&
1280                     (e->op_mid == req->mid)) {
1281                         DEBUG(0, ("Trying to defer an already deferred "
1282                                 "request: mid=%llu, exiting\n",
1283                                 (unsigned long long)req->mid));
1284                         exit_server("attempt to defer a deferred request");
1285                 }
1286         }
1287
1288         /* End paranoia check */
1289
1290         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1291                   "open entry for mid %llu\n",
1292                   (unsigned int)request_time.tv_sec,
1293                   (unsigned int)request_time.tv_usec,
1294                   (unsigned long long)req->mid));
1295
1296         if (!push_deferred_open_message_smb(req, request_time, timeout,
1297                                        state->id, (char *)state, sizeof(*state))) {
1298                 exit_server("push_deferred_open_message_smb failed");
1299         }
1300         add_deferred_open(lck, req->mid, request_time,
1301                           sconn_server_id(req->sconn), state->id);
1302 }
1303
1304
1305 /****************************************************************************
1306  On overwrite open ensure that the attributes match.
1307 ****************************************************************************/
1308
1309 bool open_match_attributes(connection_struct *conn,
1310                            uint32 old_dos_attr,
1311                            uint32 new_dos_attr,
1312                            mode_t existing_unx_mode,
1313                            mode_t new_unx_mode,
1314                            mode_t *returned_unx_mode)
1315 {
1316         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1317
1318         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1319         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1320
1321         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1322            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1323                 *returned_unx_mode = new_unx_mode;
1324         } else {
1325                 *returned_unx_mode = (mode_t)0;
1326         }
1327
1328         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1329                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1330                   "returned_unx_mode = 0%o\n",
1331                   (unsigned int)old_dos_attr,
1332                   (unsigned int)existing_unx_mode,
1333                   (unsigned int)new_dos_attr,
1334                   (unsigned int)*returned_unx_mode ));
1335
1336         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1337         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1338                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1339                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1340                         return False;
1341                 }
1342         }
1343         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1344                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1345                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1346                         return False;
1347                 }
1348         }
1349         return True;
1350 }
1351
1352 /****************************************************************************
1353  Special FCB or DOS processing in the case of a sharing violation.
1354  Try and find a duplicated file handle.
1355 ****************************************************************************/
1356
1357 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1358                                      connection_struct *conn,
1359                                      files_struct *fsp_to_dup_into,
1360                                      const struct smb_filename *smb_fname,
1361                                      struct file_id id,
1362                                      uint16 file_pid,
1363                                      uint16 vuid,
1364                                      uint32 access_mask,
1365                                      uint32 share_access,
1366                                      uint32 create_options)
1367 {
1368         files_struct *fsp;
1369
1370         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1371                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1372
1373         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1374             fsp = file_find_di_next(fsp)) {
1375
1376                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1377                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1378                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1379                           fsp->fh->fd, (unsigned int)fsp->vuid,
1380                           (unsigned int)fsp->file_pid,
1381                           (unsigned int)fsp->fh->private_options,
1382                           (unsigned int)fsp->access_mask ));
1383
1384                 if (fsp->fh->fd != -1 &&
1385                     fsp->vuid == vuid &&
1386                     fsp->file_pid == file_pid &&
1387                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1388                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1389                     (fsp->access_mask & FILE_WRITE_DATA) &&
1390                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1391                     strequal(fsp->fsp_name->stream_name,
1392                              smb_fname->stream_name)) {
1393                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1394                         break;
1395                 }
1396         }
1397
1398         if (!fsp) {
1399                 return NT_STATUS_NOT_FOUND;
1400         }
1401
1402         /* quite an insane set of semantics ... */
1403         if (is_executable(smb_fname->base_name) &&
1404             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1405                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1406                 return NT_STATUS_INVALID_PARAMETER;
1407         }
1408
1409         /* We need to duplicate this fsp. */
1410         return dup_file_fsp(req, fsp, access_mask, share_access,
1411                             create_options, fsp_to_dup_into);
1412 }
1413
1414 static void schedule_defer_open(struct share_mode_lock *lck,
1415                                 struct timeval request_time,
1416                                 struct smb_request *req)
1417 {
1418         struct deferred_open_record state;
1419
1420         /* This is a relative time, added to the absolute
1421            request_time value to get the absolute timeout time.
1422            Note that if this is the second or greater time we enter
1423            this codepath for this particular request mid then
1424            request_time is left as the absolute time of the *first*
1425            time this request mid was processed. This is what allows
1426            the request to eventually time out. */
1427
1428         struct timeval timeout;
1429
1430         /* Normally the smbd we asked should respond within
1431          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1432          * the client did, give twice the timeout as a safety
1433          * measure here in case the other smbd is stuck
1434          * somewhere else. */
1435
1436         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1437
1438         /* Nothing actually uses state.delayed_for_oplocks
1439            but it's handy to differentiate in debug messages
1440            between a 30 second delay due to oplock break, and
1441            a 1 second delay for share mode conflicts. */
1442
1443         state.delayed_for_oplocks = True;
1444         state.id = lck->id;
1445
1446         if (!request_timed_out(request_time, timeout)) {
1447                 defer_open(lck, request_time, timeout, req, &state);
1448         }
1449 }
1450
1451 /****************************************************************************
1452  Work out what access_mask to use from what the client sent us.
1453 ****************************************************************************/
1454
1455 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1456                                     const struct smb_filename *smb_fname,
1457                                     bool file_existed,
1458                                     uint32_t access_mask,
1459                                     uint32_t *access_mask_out)
1460 {
1461         NTSTATUS status;
1462         uint32_t orig_access_mask = access_mask;
1463         uint32_t rejected_share_access;
1464
1465         /*
1466          * Convert GENERIC bits to specific bits.
1467          */
1468
1469         se_map_generic(&access_mask, &file_generic_mapping);
1470
1471         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1472         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1473                 if (get_current_uid(conn) == (uid_t)0) {
1474                         access_mask  |= FILE_GENERIC_ALL;
1475                 } else if (file_existed) {
1476
1477                         struct security_descriptor *sd;
1478                         uint32_t access_granted = 0;
1479
1480                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1481                                         (SECINFO_OWNER |
1482                                         SECINFO_GROUP |
1483                                         SECINFO_DACL),&sd);
1484
1485                         if (!NT_STATUS_IS_OK(status)) {
1486                                 DEBUG(10,("smbd_calculate_access_mask: "
1487                                         "Could not get acl on file %s: %s\n",
1488                                         smb_fname_str_dbg(smb_fname),
1489                                         nt_errstr(status)));
1490                                 return NT_STATUS_ACCESS_DENIED;
1491                         }
1492
1493                         /*
1494                          * Never test FILE_READ_ATTRIBUTES. se_access_check()
1495                          * also takes care of owner WRITE_DAC and READ_CONTROL.
1496                          */
1497                         status = se_access_check(sd,
1498                                         get_current_nttok(conn),
1499                                         (access_mask & ~FILE_READ_ATTRIBUTES),
1500                                         &access_granted);
1501
1502                         TALLOC_FREE(sd);
1503
1504                         if (!NT_STATUS_IS_OK(status)) {
1505                                 DEBUG(10, ("smbd_calculate_access_mask: "
1506                                         "Access denied on file %s: "
1507                                         "when calculating maximum access\n",
1508                                         smb_fname_str_dbg(smb_fname)));
1509                                 return NT_STATUS_ACCESS_DENIED;
1510                         }
1511
1512                         access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1513                 } else {
1514                         access_mask = FILE_GENERIC_ALL;
1515                 }
1516
1517                 access_mask &= conn->share_access;
1518         }
1519
1520         rejected_share_access = access_mask & ~(conn->share_access);
1521
1522         if (rejected_share_access) {
1523                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1524                         "file %s: rejected by share access mask[0x%08X] "
1525                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1526                         smb_fname_str_dbg(smb_fname),
1527                         conn->share_access,
1528                         orig_access_mask, access_mask,
1529                         rejected_share_access));
1530                 return NT_STATUS_ACCESS_DENIED;
1531         }
1532
1533         *access_mask_out = access_mask;
1534         return NT_STATUS_OK;
1535 }
1536
1537 /****************************************************************************
1538  Remove the deferred open entry under lock.
1539 ****************************************************************************/
1540
1541 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1542                                 struct server_id pid)
1543 {
1544         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1545                         NULL, NULL, NULL);
1546         if (lck == NULL) {
1547                 DEBUG(0, ("could not get share mode lock\n"));
1548                 return;
1549         }
1550         del_deferred_open_entry(lck, mid, pid);
1551         TALLOC_FREE(lck);
1552 }
1553
1554 /****************************************************************
1555  Ensure we get the brlock lock followed by the share mode lock
1556  in the correct order to prevent deadlocks if other smbd's are
1557  using the brlock database on this file simultaneously with this open
1558  (that code also gets the locks in brlock -> share mode lock order).
1559 ****************************************************************/
1560
1561 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1562                                 files_struct *fsp,
1563                                 const struct file_id id,
1564                                 const char *connectpath,
1565                                 const struct smb_filename *smb_fname,
1566                                 const struct timespec *p_old_write_time,
1567                                 struct share_mode_lock **p_lck,
1568                                 struct byte_range_lock **p_br_lck)
1569 {
1570         /* Ordering - we must get the br_lck for this
1571            file before the share mode. */
1572         if (lp_locking(fsp->conn->params)) {
1573                 *p_br_lck = brl_get_locks_readonly(fsp);
1574                 if (*p_br_lck == NULL) {
1575                         DEBUG(0, ("Could not get br_lock\n"));
1576                         return false;
1577                 }
1578                 /* Note - we don't need to free the returned
1579                    br_lck explicitly as it was allocated on talloc_tos()
1580                    and so will be autofreed (and release the lock)
1581                    once the frame context disappears.
1582
1583                    If it was set to fsp->brlock_rec then it was
1584                    talloc_move'd to hang off the fsp pointer and
1585                    in this case is guarenteed to not be holding the
1586                    lock on the brlock database. */
1587         }
1588
1589         *p_lck = get_share_mode_lock(mem_ctx,
1590                                 id,
1591                                 connectpath,
1592                                 smb_fname,
1593                                 p_old_write_time);
1594
1595         if (*p_lck == NULL) {
1596                 DEBUG(0, ("Could not get share mode lock\n"));
1597                 TALLOC_FREE(*p_br_lck);
1598                 return false;
1599         }
1600         return true;
1601 }
1602
1603 /****************************************************************************
1604  Open a file with a share mode. Passed in an already created files_struct *.
1605 ****************************************************************************/
1606
1607 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1608                             struct smb_request *req,
1609                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1610                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1611                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1612                             uint32 create_options,      /* options such as delete on close. */
1613                             uint32 new_dos_attributes,  /* attributes used for new file. */
1614                             int oplock_request,         /* internal Samba oplock codes. */
1615                                                         /* Information (FILE_EXISTS etc.) */
1616                             uint32_t private_flags,     /* Samba specific flags. */
1617                             int *pinfo,
1618                             files_struct *fsp)
1619 {
1620         struct smb_filename *smb_fname = fsp->fsp_name;
1621         int flags=0;
1622         int flags2=0;
1623         bool file_existed = VALID_STAT(smb_fname->st);
1624         bool def_acl = False;
1625         bool posix_open = False;
1626         bool new_file_created = False;
1627         bool clear_ads = false;
1628         struct file_id id;
1629         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1630         mode_t new_unx_mode = (mode_t)0;
1631         mode_t unx_mode = (mode_t)0;
1632         int info;
1633         uint32 existing_dos_attributes = 0;
1634         struct timeval request_time = timeval_zero();
1635         struct share_mode_lock *lck = NULL;
1636         uint32 open_access_mask = access_mask;
1637         NTSTATUS status;
1638         char *parent_dir;
1639
1640         ZERO_STRUCT(id);
1641
1642         if (conn->printer) {
1643                 /*
1644                  * Printers are handled completely differently.
1645                  * Most of the passed parameters are ignored.
1646                  */
1647
1648                 if (pinfo) {
1649                         *pinfo = FILE_WAS_CREATED;
1650                 }
1651
1652                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1653                            smb_fname_str_dbg(smb_fname)));
1654
1655                 if (!req) {
1656                         DEBUG(0,("open_file_ntcreate: printer open without "
1657                                 "an SMB request!\n"));
1658                         return NT_STATUS_INTERNAL_ERROR;
1659                 }
1660
1661                 return print_spool_open(fsp, smb_fname->base_name,
1662                                         req->vuid);
1663         }
1664
1665         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1666                             NULL)) {
1667                 return NT_STATUS_NO_MEMORY;
1668         }
1669
1670         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1671                 posix_open = True;
1672                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1673                 new_dos_attributes = 0;
1674         } else {
1675                 /* Windows allows a new file to be created and
1676                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1677                    sent by the client. Do the same. */
1678
1679                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1680
1681                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1682                  * created new. */
1683                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1684                                      smb_fname, parent_dir);
1685         }
1686
1687         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1688                    "access_mask=0x%x share_access=0x%x "
1689                    "create_disposition = 0x%x create_options=0x%x "
1690                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1691                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1692                    access_mask, share_access, create_disposition,
1693                    create_options, (unsigned int)unx_mode, oplock_request,
1694                    (unsigned int)private_flags));
1695
1696         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1697                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1698                 return NT_STATUS_INTERNAL_ERROR;
1699         }
1700
1701         /*
1702          * Only non-internal opens can be deferred at all
1703          */
1704
1705         if (req) {
1706                 void *ptr;
1707                 if (get_deferred_open_message_state(req,
1708                                 &request_time,
1709                                 &ptr)) {
1710
1711                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1712                         /* Remember the absolute time of the original
1713                            request with this mid. We'll use it later to
1714                            see if this has timed out. */
1715
1716                         /* Remove the deferred open entry under lock. */
1717                         remove_deferred_open_entry(
1718                                 state->id, req->mid,
1719                                 sconn_server_id(req->sconn));
1720
1721                         /* Ensure we don't reprocess this message. */
1722                         remove_deferred_open_message_smb(req->sconn, req->mid);
1723                 }
1724         }
1725
1726         status = check_name(conn, smb_fname->base_name);
1727         if (!NT_STATUS_IS_OK(status)) {
1728                 return status;
1729         }
1730
1731         if (!posix_open) {
1732                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1733                 if (file_existed) {
1734                         existing_dos_attributes = dos_mode(conn, smb_fname);
1735                 }
1736         }
1737
1738         /* ignore any oplock requests if oplocks are disabled */
1739         if (!lp_oplocks(SNUM(conn)) ||
1740             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1741                 /* Mask off everything except the private Samba bits. */
1742                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1743         }
1744
1745         /* this is for OS/2 long file names - say we don't support them */
1746         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1747                 /* OS/2 Workplace shell fix may be main code stream in a later
1748                  * release. */
1749                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1750                          "supported.\n"));
1751                 if (use_nt_status()) {
1752                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1753                 }
1754                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1755         }
1756
1757         switch( create_disposition ) {
1758                 /*
1759                  * Currently we're using FILE_SUPERSEDE as the same as
1760                  * FILE_OVERWRITE_IF but they really are
1761                  * different. FILE_SUPERSEDE deletes an existing file
1762                  * (requiring delete access) then recreates it.
1763                  */
1764                 case FILE_SUPERSEDE:
1765                         /* If file exists replace/overwrite. If file doesn't
1766                          * exist create. */
1767                         flags2 |= (O_CREAT | O_TRUNC);
1768                         clear_ads = true;
1769                         break;
1770
1771                 case FILE_OVERWRITE_IF:
1772                         /* If file exists replace/overwrite. If file doesn't
1773                          * exist create. */
1774                         flags2 |= (O_CREAT | O_TRUNC);
1775                         clear_ads = true;
1776                         break;
1777
1778                 case FILE_OPEN:
1779                         /* If file exists open. If file doesn't exist error. */
1780                         if (!file_existed) {
1781                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1782                                          "requested for file %s and file "
1783                                          "doesn't exist.\n",
1784                                          smb_fname_str_dbg(smb_fname)));
1785                                 errno = ENOENT;
1786                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1787                         }
1788                         break;
1789
1790                 case FILE_OVERWRITE:
1791                         /* If file exists overwrite. If file doesn't exist
1792                          * error. */
1793                         if (!file_existed) {
1794                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1795                                          "requested for file %s and file "
1796                                          "doesn't exist.\n",
1797                                          smb_fname_str_dbg(smb_fname) ));
1798                                 errno = ENOENT;
1799                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1800                         }
1801                         flags2 |= O_TRUNC;
1802                         clear_ads = true;
1803                         break;
1804
1805                 case FILE_CREATE:
1806                         /* If file exists error. If file doesn't exist
1807                          * create. */
1808                         if (file_existed) {
1809                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1810                                          "requested for file %s and file "
1811                                          "already exists.\n",
1812                                          smb_fname_str_dbg(smb_fname)));
1813                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1814                                         errno = EISDIR;
1815                                 } else {
1816                                         errno = EEXIST;
1817                                 }
1818                                 return map_nt_error_from_unix(errno);
1819                         }
1820                         flags2 |= (O_CREAT|O_EXCL);
1821                         break;
1822
1823                 case FILE_OPEN_IF:
1824                         /* If file exists open. If file doesn't exist
1825                          * create. */
1826                         flags2 |= O_CREAT;
1827                         break;
1828
1829                 default:
1830                         return NT_STATUS_INVALID_PARAMETER;
1831         }
1832
1833         /* We only care about matching attributes on file exists and
1834          * overwrite. */
1835
1836         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1837                              (create_disposition == FILE_OVERWRITE_IF))) {
1838                 if (!open_match_attributes(conn, existing_dos_attributes,
1839                                            new_dos_attributes,
1840                                            smb_fname->st.st_ex_mode,
1841                                            unx_mode, &new_unx_mode)) {
1842                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1843                                  "for file %s (%x %x) (0%o, 0%o)\n",
1844                                  smb_fname_str_dbg(smb_fname),
1845                                  existing_dos_attributes,
1846                                  new_dos_attributes,
1847                                  (unsigned int)smb_fname->st.st_ex_mode,
1848                                  (unsigned int)unx_mode ));
1849                         errno = EACCES;
1850                         return NT_STATUS_ACCESS_DENIED;
1851                 }
1852         }
1853
1854         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1855                                         access_mask,
1856                                         &access_mask);
1857         if (!NT_STATUS_IS_OK(status)) {
1858                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1859                         "on file %s returned %s\n",
1860                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1861                 return status;
1862         }
1863
1864         open_access_mask = access_mask;
1865
1866         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1867                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1868         }
1869
1870         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1871                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1872                     access_mask));
1873
1874         /*
1875          * Note that we ignore the append flag as append does not
1876          * mean the same thing under DOS and Unix.
1877          */
1878
1879         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1880                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1881                 /* DENY_DOS opens are always underlying read-write on the
1882                    file handle, no matter what the requested access mask
1883                     says. */
1884                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1885                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1886                         flags = O_RDWR;
1887                 } else {
1888                         flags = O_WRONLY;
1889                 }
1890         } else {
1891                 flags = O_RDONLY;
1892         }
1893
1894         /*
1895          * Currently we only look at FILE_WRITE_THROUGH for create options.
1896          */
1897
1898 #if defined(O_SYNC)
1899         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1900                 flags2 |= O_SYNC;
1901         }
1902 #endif /* O_SYNC */
1903
1904         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1905                 flags2 |= O_APPEND;
1906         }
1907
1908         if (!posix_open && !CAN_WRITE(conn)) {
1909                 /*
1910                  * We should really return a permission denied error if either
1911                  * O_CREAT or O_TRUNC are set, but for compatibility with
1912                  * older versions of Samba we just AND them out.
1913                  */
1914                 flags2 &= ~(O_CREAT|O_TRUNC);
1915         }
1916
1917         /*
1918          * Ensure we can't write on a read-only share or file.
1919          */
1920
1921         if (flags != O_RDONLY && file_existed &&
1922             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1923                 DEBUG(5,("open_file_ntcreate: write access requested for "
1924                          "file %s on read only %s\n",
1925                          smb_fname_str_dbg(smb_fname),
1926                          !CAN_WRITE(conn) ? "share" : "file" ));
1927                 errno = EACCES;
1928                 return NT_STATUS_ACCESS_DENIED;
1929         }
1930
1931         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1932         fsp->share_access = share_access;
1933         fsp->fh->private_options = private_flags;
1934         fsp->access_mask = open_access_mask; /* We change this to the
1935                                               * requested access_mask after
1936                                               * the open is done. */
1937         fsp->posix_open = posix_open;
1938
1939         /* Ensure no SAMBA_PRIVATE bits can be set. */
1940         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1941
1942         if (timeval_is_zero(&request_time)) {
1943                 request_time = fsp->open_time;
1944         }
1945
1946         if (file_existed) {
1947                 struct byte_range_lock *br_lck = NULL;
1948                 struct share_mode_entry *batch_entry = NULL;
1949                 struct share_mode_entry *exclusive_entry = NULL;
1950                 bool got_level2_oplock = false;
1951                 bool got_a_none_oplock = false;
1952
1953                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1954                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1955
1956                 if (!acquire_ordered_locks(talloc_tos(),
1957                                         fsp,
1958                                         id,
1959                                         conn->connectpath,
1960                                         smb_fname,
1961                                         &old_write_time,
1962                                         &lck,
1963                                         &br_lck)) {
1964                         return NT_STATUS_SHARING_VIOLATION;
1965                 }
1966
1967                 /* Get the types we need to examine. */
1968                 find_oplock_types(fsp,
1969                                 oplock_request,
1970                                 lck,
1971                                 &batch_entry,
1972                                 &exclusive_entry,
1973                                 &got_level2_oplock,
1974                                 &got_a_none_oplock);
1975
1976                 /* First pass - send break only on batch oplocks. */
1977                 if ((req != NULL) &&
1978                                 delay_for_batch_oplocks(fsp,
1979                                         req->mid,
1980                                         oplock_request,
1981                                         batch_entry)) {
1982                         schedule_defer_open(lck, request_time, req);
1983                         TALLOC_FREE(lck);
1984                         return NT_STATUS_SHARING_VIOLATION;
1985                 }
1986
1987                 /* Use the client requested access mask here, not the one we
1988                  * open with. */
1989                 status = open_mode_check(conn, lck, fsp->name_hash,
1990                                         access_mask, share_access,
1991                                          create_options, &file_existed);
1992
1993                 if (NT_STATUS_IS_OK(status)) {
1994                         /* We might be going to allow this open. Check oplock
1995                          * status again. */
1996                         /* Second pass - send break for both batch or
1997                          * exclusive oplocks. */
1998                         if ((req != NULL) &&
1999                                         delay_for_exclusive_oplocks(
2000                                                 fsp,
2001                                                 req->mid,
2002                                                 oplock_request,
2003                                                 exclusive_entry)) {
2004                                 schedule_defer_open(lck, request_time, req);
2005                                 TALLOC_FREE(lck);
2006                                 return NT_STATUS_SHARING_VIOLATION;
2007                         }
2008                 }
2009
2010                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2011                         /* DELETE_PENDING is not deferred for a second */
2012                         TALLOC_FREE(lck);
2013                         return status;
2014                 }
2015
2016                 grant_fsp_oplock_type(fsp,
2017                                 br_lck,
2018                                 oplock_request,
2019                                 got_level2_oplock,
2020                                 got_a_none_oplock);
2021
2022                 if (!NT_STATUS_IS_OK(status)) {
2023                         uint32 can_access_mask;
2024                         bool can_access = True;
2025
2026                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2027
2028                         /* Check if this can be done with the deny_dos and fcb
2029                          * calls. */
2030                         if (private_flags &
2031                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2032                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2033                                 if (req == NULL) {
2034                                         DEBUG(0, ("DOS open without an SMB "
2035                                                   "request!\n"));
2036                                         TALLOC_FREE(lck);
2037                                         return NT_STATUS_INTERNAL_ERROR;
2038                                 }
2039
2040                                 /* Use the client requested access mask here,
2041                                  * not the one we open with. */
2042                                 status = fcb_or_dos_open(req,
2043                                                         conn,
2044                                                         fsp,
2045                                                         smb_fname,
2046                                                         id,
2047                                                         req->smbpid,
2048                                                         req->vuid,
2049                                                         access_mask,
2050                                                         share_access,
2051                                                         create_options);
2052
2053                                 if (NT_STATUS_IS_OK(status)) {
2054                                         TALLOC_FREE(lck);
2055                                         if (pinfo) {
2056                                                 *pinfo = FILE_WAS_OPENED;
2057                                         }
2058                                         return NT_STATUS_OK;
2059                                 }
2060                         }
2061
2062                         /*
2063                          * This next line is a subtlety we need for
2064                          * MS-Access. If a file open will fail due to share
2065                          * permissions and also for security (access) reasons,
2066                          * we need to return the access failed error, not the
2067                          * share error. We can't open the file due to kernel
2068                          * oplock deadlock (it's possible we failed above on
2069                          * the open_mode_check()) so use a userspace check.
2070                          */
2071
2072                         if (flags & O_RDWR) {
2073                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2074                         } else if (flags & O_WRONLY) {
2075                                 can_access_mask = FILE_WRITE_DATA;
2076                         } else {
2077                                 can_access_mask = FILE_READ_DATA;
2078                         }
2079
2080                         if (((can_access_mask & FILE_WRITE_DATA) &&
2081                                 !CAN_WRITE(conn)) ||
2082                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2083                                                 smb_fname, can_access_mask))) {
2084                                 can_access = False;
2085                         }
2086
2087                         /*
2088                          * If we're returning a share violation, ensure we
2089                          * cope with the braindead 1 second delay.
2090                          */
2091
2092                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2093                             lp_defer_sharing_violations()) {
2094                                 struct timeval timeout;
2095                                 struct deferred_open_record state;
2096                                 int timeout_usecs;
2097
2098                                 /* this is a hack to speed up torture tests
2099                                    in 'make test' */
2100                                 timeout_usecs = lp_parm_int(SNUM(conn),
2101                                                             "smbd","sharedelay",
2102                                                             SHARING_VIOLATION_USEC_WAIT);
2103
2104                                 /* This is a relative time, added to the absolute
2105                                    request_time value to get the absolute timeout time.
2106                                    Note that if this is the second or greater time we enter
2107                                    this codepath for this particular request mid then
2108                                    request_time is left as the absolute time of the *first*
2109                                    time this request mid was processed. This is what allows
2110                                    the request to eventually time out. */
2111
2112                                 timeout = timeval_set(0, timeout_usecs);
2113
2114                                 /* Nothing actually uses state.delayed_for_oplocks
2115                                    but it's handy to differentiate in debug messages
2116                                    between a 30 second delay due to oplock break, and
2117                                    a 1 second delay for share mode conflicts. */
2118
2119                                 state.delayed_for_oplocks = False;
2120                                 state.id = id;
2121
2122                                 if ((req != NULL)
2123                                     && !request_timed_out(request_time,
2124                                                           timeout)) {
2125                                         defer_open(lck, request_time, timeout,
2126                                                    req, &state);
2127                                 }
2128                         }
2129
2130                         TALLOC_FREE(lck);
2131                         if (can_access) {
2132                                 /*
2133                                  * We have detected a sharing violation here
2134                                  * so return the correct error code
2135                                  */
2136                                 status = NT_STATUS_SHARING_VIOLATION;
2137                         } else {
2138                                 status = NT_STATUS_ACCESS_DENIED;
2139                         }
2140                         return status;
2141                 }
2142
2143                 /*
2144                  * We exit this block with the share entry *locked*.....
2145                  */
2146         }
2147
2148         SMB_ASSERT(!file_existed || (lck != NULL));
2149
2150         /*
2151          * Ensure we pay attention to default ACLs on directories if required.
2152          */
2153
2154         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2155             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2156                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2157         }
2158
2159         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2160                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2161                  (unsigned int)flags, (unsigned int)flags2,
2162                  (unsigned int)unx_mode, (unsigned int)access_mask,
2163                  (unsigned int)open_access_mask));
2164
2165         /*
2166          * open_file strips any O_TRUNC flags itself.
2167          */
2168
2169         fsp_open = open_file(fsp, conn, req, parent_dir,
2170                              flags|flags2, unx_mode, access_mask,
2171                              open_access_mask);
2172
2173         if (!NT_STATUS_IS_OK(fsp_open)) {
2174                 TALLOC_FREE(lck);
2175                 return fsp_open;
2176         }
2177
2178         if (!file_existed) {
2179                 struct byte_range_lock *br_lck = NULL;
2180                 struct share_mode_entry *batch_entry = NULL;
2181                 struct share_mode_entry *exclusive_entry = NULL;
2182                 bool got_level2_oplock = false;
2183                 bool got_a_none_oplock = false;
2184                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2185                 /*
2186                  * Deal with the race condition where two smbd's detect the
2187                  * file doesn't exist and do the create at the same time. One
2188                  * of them will win and set a share mode, the other (ie. this
2189                  * one) should check if the requested share mode for this
2190                  * create is allowed.
2191                  */
2192
2193                 /*
2194                  * Now the file exists and fsp is successfully opened,
2195                  * fsp->dev and fsp->inode are valid and should replace the
2196                  * dev=0,inode=0 from a non existent file. Spotted by
2197                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2198                  */
2199
2200                 id = fsp->file_id;
2201
2202                 if (!acquire_ordered_locks(talloc_tos(),
2203                                         fsp,
2204                                         id,
2205                                         conn->connectpath,
2206                                         smb_fname,
2207                                         &old_write_time,
2208                                         &lck,
2209                                         &br_lck)) {
2210                         return NT_STATUS_SHARING_VIOLATION;
2211                 }
2212
2213                 /* Get the types we need to examine. */
2214                 find_oplock_types(fsp,
2215                                 oplock_request,
2216                                 lck,
2217                                 &batch_entry,
2218                                 &exclusive_entry,
2219                                 &got_level2_oplock,
2220                                 &got_a_none_oplock);
2221
2222                 /* First pass - send break only on batch oplocks. */
2223                 if ((req != NULL) &&
2224                                 delay_for_batch_oplocks(fsp,
2225                                         req->mid,
2226                                         oplock_request,
2227                                         batch_entry)) {
2228                         schedule_defer_open(lck, request_time, req);
2229                         TALLOC_FREE(lck);
2230                         fd_close(fsp);
2231                         return NT_STATUS_SHARING_VIOLATION;
2232                 }
2233
2234                 status = open_mode_check(conn, lck, fsp->name_hash,
2235                                         access_mask, share_access,
2236                                          create_options, &file_existed);
2237
2238                 if (NT_STATUS_IS_OK(status)) {
2239                         /* We might be going to allow this open. Check oplock
2240                          * status again. */
2241                         /* Second pass - send break for both batch or
2242                          * exclusive oplocks. */
2243                         if ((req != NULL) &&
2244                                         delay_for_exclusive_oplocks(
2245                                                 fsp,
2246                                                 req->mid,
2247                                                 oplock_request,
2248                                                 exclusive_entry)) {
2249                                 schedule_defer_open(lck, request_time, req);
2250                                 TALLOC_FREE(lck);
2251                                 fd_close(fsp);
2252                                 return NT_STATUS_SHARING_VIOLATION;
2253                         }
2254                 }
2255
2256                 if (!NT_STATUS_IS_OK(status)) {
2257                         struct deferred_open_record state;
2258
2259                         state.delayed_for_oplocks = False;
2260                         state.id = id;
2261
2262                         /* Do it all over again immediately. In the second
2263                          * round we will find that the file existed and handle
2264                          * the DELETE_PENDING and FCB cases correctly. No need
2265                          * to duplicate the code here. Essentially this is a
2266                          * "goto top of this function", but don't tell
2267                          * anybody... */
2268
2269                         if (req != NULL) {
2270                                 defer_open(lck, request_time, timeval_zero(),
2271                                            req, &state);
2272                         }
2273                         TALLOC_FREE(lck);
2274                         fd_close(fsp);
2275                         return status;
2276                 }
2277
2278                 grant_fsp_oplock_type(fsp,
2279                                 br_lck,
2280                                 oplock_request,
2281                                 got_level2_oplock,
2282                                 got_a_none_oplock);
2283
2284                 /*
2285                  * We exit this block with the share entry *locked*.....
2286                  */
2287
2288         }
2289
2290         SMB_ASSERT(lck != NULL);
2291
2292         /* Delete streams if create_disposition requires it */
2293         if (file_existed && clear_ads &&
2294             !is_ntfs_stream_smb_fname(smb_fname)) {
2295                 status = delete_all_streams(conn, smb_fname->base_name);
2296                 if (!NT_STATUS_IS_OK(status)) {
2297                         TALLOC_FREE(lck);
2298                         fd_close(fsp);
2299                         return status;
2300                 }
2301         }
2302
2303         /* note that we ignore failure for the following. It is
2304            basically a hack for NFS, and NFS will never set one of
2305            these only read them. Nobody but Samba can ever set a deny
2306            mode and we have already checked our more authoritative
2307            locking database for permission to set this deny mode. If
2308            the kernel refuses the operations then the kernel is wrong.
2309            note that GPFS supports it as well - jmcd */
2310
2311         if (fsp->fh->fd != -1) {
2312                 int ret_flock;
2313                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2314                 if(ret_flock == -1 ){
2315
2316                         TALLOC_FREE(lck);
2317                         fd_close(fsp);
2318
2319                         return NT_STATUS_SHARING_VIOLATION;
2320                 }
2321         }
2322
2323         /*
2324          * At this point onwards, we can guarentee that the share entry
2325          * is locked, whether we created the file or not, and that the
2326          * deny mode is compatible with all current opens.
2327          */
2328
2329         /*
2330          * If requested, truncate the file.
2331          */
2332
2333         if (file_existed && (flags2&O_TRUNC)) {
2334                 /*
2335                  * We are modifing the file after open - update the stat
2336                  * struct..
2337                  */
2338                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2339                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2340                         status = map_nt_error_from_unix(errno);
2341                         TALLOC_FREE(lck);
2342                         fd_close(fsp);
2343                         return status;
2344                 }
2345         }
2346
2347         /*
2348          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2349          * but we don't have to store this - just ignore it on access check.
2350          */
2351         if (conn->sconn->using_smb2) {
2352                 /*
2353                  * SMB2 doesn't return it (according to Microsoft tests).
2354                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2355                  * File created with access = 0x7 (Read, Write, Delete)
2356                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2357                  */
2358                 fsp->access_mask = access_mask;
2359         } else {
2360                 /* But SMB1 does. */
2361                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2362         }
2363
2364         if (file_existed) {
2365                 /* stat opens on existing files don't get oplocks. */
2366                 if (is_stat_open(open_access_mask)) {
2367                         fsp->oplock_type = NO_OPLOCK;
2368                 }
2369
2370                 if (!(flags2 & O_TRUNC)) {
2371                         info = FILE_WAS_OPENED;
2372                 } else {
2373                         info = FILE_WAS_OVERWRITTEN;
2374                 }
2375         } else {
2376                 info = FILE_WAS_CREATED;
2377         }
2378
2379         if (pinfo) {
2380                 *pinfo = info;
2381         }
2382
2383         /*
2384          * Setup the oplock info in both the shared memory and
2385          * file structs.
2386          */
2387
2388         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2389                 /*
2390                  * Could not get the kernel oplock or there are byte-range
2391                  * locks on the file.
2392                  */
2393                 fsp->oplock_type = NO_OPLOCK;
2394         }
2395
2396         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2397                 new_file_created = True;
2398         }
2399
2400         set_share_mode(lck, fsp, get_current_uid(conn),
2401                         req ? req->mid : 0,
2402                        fsp->oplock_type);
2403
2404         /* Handle strange delete on close create semantics. */
2405         if (create_options & FILE_DELETE_ON_CLOSE) {
2406
2407                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2408
2409                 if (!NT_STATUS_IS_OK(status)) {
2410                         /* Remember to delete the mode we just added. */
2411                         del_share_mode(lck, fsp);
2412                         TALLOC_FREE(lck);
2413                         fd_close(fsp);
2414                         return status;
2415                 }
2416                 /* Note that here we set the *inital* delete on close flag,
2417                    not the regular one. The magic gets handled in close. */
2418                 fsp->initial_delete_on_close = True;
2419         }
2420
2421         if (new_file_created) {
2422                 /* Files should be initially set as archive */
2423                 if (lp_map_archive(SNUM(conn)) ||
2424                     lp_store_dos_attributes(SNUM(conn))) {
2425                         if (!posix_open) {
2426                                 if (file_set_dosmode(conn, smb_fname,
2427                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2428                                             parent_dir, true) == 0) {
2429                                         unx_mode = smb_fname->st.st_ex_mode;
2430                                 }
2431                         }
2432                 }
2433         }
2434
2435         /* Determine sparse flag. */
2436         if (posix_open) {
2437                 /* POSIX opens are sparse by default. */
2438                 fsp->is_sparse = true;
2439         } else {
2440                 fsp->is_sparse = (file_existed &&
2441                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2442         }
2443
2444         /*
2445          * Take care of inherited ACLs on created files - if default ACL not
2446          * selected.
2447          */
2448
2449         if (!posix_open && !file_existed && !def_acl) {
2450
2451                 int saved_errno = errno; /* We might get ENOSYS in the next
2452                                           * call.. */
2453
2454                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2455                     errno == ENOSYS) {
2456                         errno = saved_errno; /* Ignore ENOSYS */
2457                 }
2458
2459         } else if (new_unx_mode) {
2460
2461                 int ret = -1;
2462
2463                 /* Attributes need changing. File already existed. */
2464
2465                 {
2466                         int saved_errno = errno; /* We might get ENOSYS in the
2467                                                   * next call.. */
2468                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2469
2470                         if (ret == -1 && errno == ENOSYS) {
2471                                 errno = saved_errno; /* Ignore ENOSYS */
2472                         } else {
2473                                 DEBUG(5, ("open_file_ntcreate: reset "
2474                                           "attributes of file %s to 0%o\n",
2475                                           smb_fname_str_dbg(smb_fname),
2476                                           (unsigned int)new_unx_mode));
2477                                 ret = 0; /* Don't do the fchmod below. */
2478                         }
2479                 }
2480
2481                 if ((ret == -1) &&
2482                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2483                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2484                                   "attributes of file %s to 0%o\n",
2485                                   smb_fname_str_dbg(smb_fname),
2486                                   (unsigned int)new_unx_mode));
2487         }
2488
2489         /* If this is a successful open, we must remove any deferred open
2490          * records. */
2491         if (req != NULL) {
2492                 del_deferred_open_entry(lck, req->mid,
2493                                         sconn_server_id(req->sconn));
2494         }
2495         TALLOC_FREE(lck);
2496
2497         return NT_STATUS_OK;
2498 }
2499
2500
2501 /****************************************************************************
2502  Open a file for for write to ensure that we can fchmod it.
2503 ****************************************************************************/
2504
2505 NTSTATUS open_file_fchmod(connection_struct *conn,
2506                           struct smb_filename *smb_fname,
2507                           files_struct **result)
2508 {
2509         if (!VALID_STAT(smb_fname->st)) {
2510                 return NT_STATUS_INVALID_PARAMETER;
2511         }
2512
2513         return SMB_VFS_CREATE_FILE(
2514                 conn,                                   /* conn */
2515                 NULL,                                   /* req */
2516                 0,                                      /* root_dir_fid */
2517                 smb_fname,                              /* fname */
2518                 FILE_WRITE_DATA,                        /* access_mask */
2519                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2520                     FILE_SHARE_DELETE),
2521                 FILE_OPEN,                              /* create_disposition*/
2522                 0,                                      /* create_options */
2523                 0,                                      /* file_attributes */
2524                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2525                 0,                                      /* allocation_size */
2526                 0,                                      /* private_flags */
2527                 NULL,                                   /* sd */
2528                 NULL,                                   /* ea_list */
2529                 result,                                 /* result */
2530                 NULL);                                  /* pinfo */
2531 }
2532
2533 static NTSTATUS mkdir_internal(connection_struct *conn,
2534                                struct smb_filename *smb_dname,
2535                                uint32 file_attributes)
2536 {
2537         mode_t mode;
2538         char *parent_dir = NULL;
2539         NTSTATUS status;
2540         bool posix_open = false;
2541         bool need_re_stat = false;
2542         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2543
2544         if(access_mask & ~(conn->share_access)) {
2545                 DEBUG(5,("mkdir_internal: failing share access "
2546                          "%s\n", lp_servicename(SNUM(conn))));
2547                 return NT_STATUS_ACCESS_DENIED;
2548         }
2549
2550         status = check_name(conn, smb_dname->base_name);
2551         if (!NT_STATUS_IS_OK(status)) {
2552                 return status;
2553         }
2554
2555         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2556                             NULL)) {
2557                 return NT_STATUS_NO_MEMORY;
2558         }
2559
2560         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2561                 posix_open = true;
2562                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2563         } else {
2564                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2565         }
2566
2567         status = check_parent_access(conn,
2568                                         smb_dname,
2569                                         access_mask,
2570                                         &parent_dir);
2571         if(!NT_STATUS_IS_OK(status)) {
2572                 DEBUG(5,("mkdir_internal: check_parent_access "
2573                         "on directory %s for path %s returned %s\n",
2574                         parent_dir,
2575                         smb_dname->base_name,
2576                         nt_errstr(status) ));
2577                 return status;
2578         }
2579
2580         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2581                 return map_nt_error_from_unix(errno);
2582         }
2583
2584         /* Ensure we're checking for a symlink here.... */
2585         /* We don't want to get caught by a symlink racer. */
2586
2587         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2588                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2589                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2590                 return map_nt_error_from_unix(errno);
2591         }
2592
2593         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2594                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2595                           smb_fname_str_dbg(smb_dname)));
2596                 return NT_STATUS_NOT_A_DIRECTORY;
2597         }
2598
2599         if (lp_store_dos_attributes(SNUM(conn))) {
2600                 if (!posix_open) {
2601                         file_set_dosmode(conn, smb_dname,
2602                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2603                                          parent_dir, true);
2604                 }
2605         }
2606
2607         if (lp_inherit_perms(SNUM(conn))) {
2608                 inherit_access_posix_acl(conn, parent_dir,
2609                                          smb_dname->base_name, mode);
2610                 need_re_stat = true;
2611         }
2612
2613         if (!posix_open) {
2614                 /*
2615                  * Check if high bits should have been set,
2616                  * then (if bits are missing): add them.
2617                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2618                  * dir.
2619                  */
2620                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2621                     (mode & ~smb_dname->st.st_ex_mode)) {
2622                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2623                                       (smb_dname->st.st_ex_mode |
2624                                           (mode & ~smb_dname->st.st_ex_mode)));
2625                         need_re_stat = true;
2626                 }
2627         }
2628
2629         /* Change the owner if required. */
2630         if (lp_inherit_owner(SNUM(conn))) {
2631                 change_dir_owner_to_parent(conn, parent_dir,
2632                                            smb_dname->base_name,
2633                                            &smb_dname->st);
2634                 need_re_stat = true;
2635         }
2636
2637         if (need_re_stat) {
2638                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2639                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2640                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2641                         return map_nt_error_from_unix(errno);
2642                 }
2643         }
2644
2645         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2646                      smb_dname->base_name);
2647
2648         return NT_STATUS_OK;
2649 }
2650
2651 /****************************************************************************
2652  Ensure we didn't get symlink raced on opening a directory.
2653 ****************************************************************************/
2654
2655 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2656                         const SMB_STRUCT_STAT *sbuf2)
2657 {
2658         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2659                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2660                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2661                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2662                 return false;
2663         }
2664         return true;
2665 }
2666
2667 /****************************************************************************
2668  Open a directory from an NT SMB call.
2669 ****************************************************************************/
2670
2671 static NTSTATUS open_directory(connection_struct *conn,
2672                                struct smb_request *req,
2673                                struct smb_filename *smb_dname,
2674                                uint32 access_mask,
2675                                uint32 share_access,
2676                                uint32 create_disposition,
2677                                uint32 create_options,
2678                                uint32 file_attributes,
2679                                int *pinfo,
2680                                files_struct **result)
2681 {
2682         files_struct *fsp = NULL;
2683         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2684         struct share_mode_lock *lck = NULL;
2685         NTSTATUS status;
2686         struct timespec mtimespec;
2687         int info = 0;
2688
2689         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2690
2691         /* Ensure we have a directory attribute. */
2692         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2693
2694         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2695                  "share_access = 0x%x create_options = 0x%x, "
2696                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2697                  smb_fname_str_dbg(smb_dname),
2698                  (unsigned int)access_mask,
2699                  (unsigned int)share_access,
2700                  (unsigned int)create_options,
2701                  (unsigned int)create_disposition,
2702                  (unsigned int)file_attributes));
2703
2704         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2705                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2706                         is_ntfs_stream_smb_fname(smb_dname)) {
2707                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2708                           smb_fname_str_dbg(smb_dname)));
2709                 return NT_STATUS_NOT_A_DIRECTORY;
2710         }
2711
2712         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2713                                             access_mask, &access_mask);
2714         if (!NT_STATUS_IS_OK(status)) {
2715                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2716                         "on file %s returned %s\n",
2717                         smb_fname_str_dbg(smb_dname),
2718                         nt_errstr(status)));
2719                 return status;
2720         }
2721
2722         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2723                         !security_token_has_privilege(get_current_nttok(conn),
2724                                         SEC_PRIV_SECURITY)) {
2725                 DEBUG(10, ("open_directory: open on %s "
2726                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2727                         smb_fname_str_dbg(smb_dname)));
2728                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2729         }
2730
2731         switch( create_disposition ) {
2732                 case FILE_OPEN:
2733
2734                         if (!dir_existed) {
2735                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2736                         }
2737
2738                         info = FILE_WAS_OPENED;
2739                         break;
2740
2741                 case FILE_CREATE:
2742
2743                         /* If directory exists error. If directory doesn't
2744                          * exist create. */
2745
2746                         if (dir_existed) {
2747                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2748                                 DEBUG(2, ("open_directory: unable to create "
2749                                           "%s. Error was %s\n",
2750                                           smb_fname_str_dbg(smb_dname),
2751                                           nt_errstr(status)));
2752                                 return status;
2753                         }
2754
2755                         status = mkdir_internal(conn, smb_dname,
2756                                                 file_attributes);
2757
2758                         if (!NT_STATUS_IS_OK(status)) {
2759                                 DEBUG(2, ("open_directory: unable to create "
2760                                           "%s. Error was %s\n",
2761                                           smb_fname_str_dbg(smb_dname),
2762                                           nt_errstr(status)));
2763                                 return status;
2764                         }
2765
2766                         info = FILE_WAS_CREATED;
2767                         break;
2768
2769                 case FILE_OPEN_IF:
2770                         /*
2771                          * If directory exists open. If directory doesn't
2772                          * exist create.
2773                          */
2774
2775                         if (dir_existed) {
2776                                 status = NT_STATUS_OK;
2777                                 info = FILE_WAS_OPENED;
2778                         } else {
2779                                 status = mkdir_internal(conn, smb_dname,
2780                                                 file_attributes);
2781
2782                                 if (NT_STATUS_IS_OK(status)) {
2783                                         info = FILE_WAS_CREATED;
2784                                 } else {
2785                                         /* Cope with create race. */
2786                                         if (!NT_STATUS_EQUAL(status,
2787                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2788                                                 DEBUG(2, ("open_directory: unable to create "
2789                                                         "%s. Error was %s\n",
2790                                                         smb_fname_str_dbg(smb_dname),
2791                                                         nt_errstr(status)));
2792                                                 return status;
2793                                         }
2794                                         info = FILE_WAS_OPENED;
2795                                 }
2796                         }
2797
2798                         break;
2799
2800                 case FILE_SUPERSEDE:
2801                 case FILE_OVERWRITE:
2802                 case FILE_OVERWRITE_IF:
2803                 default:
2804                         DEBUG(5,("open_directory: invalid create_disposition "
2805                                  "0x%x for directory %s\n",
2806                                  (unsigned int)create_disposition,
2807                                  smb_fname_str_dbg(smb_dname)));
2808                         return NT_STATUS_INVALID_PARAMETER;
2809         }
2810
2811         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2812                 DEBUG(5,("open_directory: %s is not a directory !\n",
2813                          smb_fname_str_dbg(smb_dname)));
2814                 return NT_STATUS_NOT_A_DIRECTORY;
2815         }
2816
2817         if (info == FILE_WAS_OPENED) {
2818                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2819                 if (!NT_STATUS_IS_OK(status)) {
2820                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2821                                 "file %s failed with %s\n",
2822                                 smb_fname_str_dbg(smb_dname),
2823                                 nt_errstr(status)));
2824                         return status;
2825                 }
2826         }
2827
2828         status = file_new(req, conn, &fsp);
2829         if(!NT_STATUS_IS_OK(status)) {
2830                 return status;
2831         }
2832
2833         /*
2834          * Setup the files_struct for it.
2835          */
2836
2837         fsp->mode = smb_dname->st.st_ex_mode;
2838         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2839         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2840         fsp->file_pid = req ? req->smbpid : 0;
2841         fsp->can_lock = False;
2842         fsp->can_read = False;
2843         fsp->can_write = False;
2844
2845         fsp->share_access = share_access;
2846         fsp->fh->private_options = 0;
2847         /*
2848          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2849          */
2850         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2851         fsp->print_file = NULL;
2852         fsp->modified = False;
2853         fsp->oplock_type = NO_OPLOCK;
2854         fsp->sent_oplock_break = NO_BREAK_SENT;
2855         fsp->is_directory = True;
2856         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2857         status = fsp_set_smb_fname(fsp, smb_dname);
2858         if (!NT_STATUS_IS_OK(status)) {
2859                 file_free(req, fsp);
2860                 return status;
2861         }
2862
2863         mtimespec = smb_dname->st.st_ex_mtime;
2864
2865 #ifdef O_DIRECTORY
2866         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2867 #else
2868         /* POSIX allows us to open a directory with O_RDONLY. */
2869         status = fd_open(conn, fsp, O_RDONLY, 0);
2870 #endif
2871         if (!NT_STATUS_IS_OK(status)) {
2872                 DEBUG(5, ("open_directory: Could not open fd for "
2873                         "%s (%s)\n",
2874                         smb_fname_str_dbg(smb_dname),
2875                         nt_errstr(status)));
2876                 file_free(req, fsp);
2877                 return status;
2878         }
2879
2880         status = vfs_stat_fsp(fsp);
2881         if (!NT_STATUS_IS_OK(status)) {
2882                 fd_close(fsp);
2883                 file_free(req, fsp);
2884                 return status;
2885         }
2886
2887         /* Ensure there was no race condition. */
2888         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2889                 DEBUG(5,("open_directory: stat struct differs for "
2890                         "directory %s.\n",
2891                         smb_fname_str_dbg(smb_dname)));
2892                 fd_close(fsp);
2893                 file_free(req, fsp);
2894                 return NT_STATUS_ACCESS_DENIED;
2895         }
2896
2897         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2898                                   conn->connectpath, smb_dname, &mtimespec);
2899
2900         if (lck == NULL) {
2901                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2902                           "%s\n", smb_fname_str_dbg(smb_dname)));
2903                 fd_close(fsp);
2904                 file_free(req, fsp);
2905                 return NT_STATUS_SHARING_VIOLATION;
2906         }
2907
2908         status = open_mode_check(conn, lck, fsp->name_hash,
2909                                 access_mask, share_access,
2910                                  create_options, &dir_existed);
2911
2912         if (!NT_STATUS_IS_OK(status)) {
2913                 TALLOC_FREE(lck);
2914                 fd_close(fsp);
2915                 file_free(req, fsp);
2916                 return status;
2917         }
2918
2919         set_share_mode(lck, fsp, get_current_uid(conn),
2920                         req ? req->mid : 0, NO_OPLOCK);
2921
2922         /* For directories the delete on close bit at open time seems
2923            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2924         if (create_options & FILE_DELETE_ON_CLOSE) {
2925                 status = can_set_delete_on_close(fsp, 0);
2926                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2927                         TALLOC_FREE(lck);
2928                         fd_close(fsp);
2929                         file_free(req, fsp);
2930                         return status;
2931                 }
2932
2933                 if (NT_STATUS_IS_OK(status)) {
2934                         /* Note that here we set the *inital* delete on close flag,
2935                            not the regular one. The magic gets handled in close. */
2936                         fsp->initial_delete_on_close = True;
2937                 }
2938         }
2939
2940         TALLOC_FREE(lck);
2941
2942         if (pinfo) {
2943                 *pinfo = info;
2944         }
2945
2946         *result = fsp;
2947         return NT_STATUS_OK;
2948 }
2949
2950 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2951                           struct smb_filename *smb_dname)
2952 {
2953         NTSTATUS status;
2954         files_struct *fsp;
2955
2956         status = SMB_VFS_CREATE_FILE(
2957                 conn,                                   /* conn */
2958                 req,                                    /* req */
2959                 0,                                      /* root_dir_fid */
2960                 smb_dname,                              /* fname */
2961                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2962                 FILE_SHARE_NONE,                        /* share_access */
2963                 FILE_CREATE,                            /* create_disposition*/
2964                 FILE_DIRECTORY_FILE,                    /* create_options */
2965                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2966                 0,                                      /* oplock_request */
2967                 0,                                      /* allocation_size */
2968                 0,                                      /* private_flags */
2969                 NULL,                                   /* sd */
2970                 NULL,                                   /* ea_list */
2971                 &fsp,                                   /* result */
2972                 NULL);                                  /* pinfo */
2973
2974         if (NT_STATUS_IS_OK(status)) {
2975                 close_file(req, fsp, NORMAL_CLOSE);
2976         }
2977
2978         return status;
2979 }
2980
2981 /****************************************************************************
2982  Receive notification that one of our open files has been renamed by another
2983  smbd process.
2984 ****************************************************************************/
2985
2986 void msg_file_was_renamed(struct messaging_context *msg,
2987                           void *private_data,
2988                           uint32_t msg_type,
2989                           struct server_id server_id,
2990                           DATA_BLOB *data)
2991 {
2992         files_struct *fsp;
2993         char *frm = (char *)data->data;
2994         struct file_id id;
2995         const char *sharepath;
2996         const char *base_name;
2997         const char *stream_name;
2998         struct smb_filename *smb_fname = NULL;
2999         size_t sp_len, bn_len;
3000         NTSTATUS status;
3001         struct smbd_server_connection *sconn =
3002                 talloc_get_type_abort(private_data,
3003                 struct smbd_server_connection);
3004
3005         if (data->data == NULL
3006             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3007                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3008                           (int)data->length));
3009                 return;
3010         }
3011
3012         /* Unpack the message. */
3013         pull_file_id_24(frm, &id);
3014         sharepath = &frm[24];
3015         sp_len = strlen(sharepath);
3016         base_name = sharepath + sp_len + 1;
3017         bn_len = strlen(base_name);
3018         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3019
3020         /* stream_name must always be NULL if there is no stream. */
3021         if (stream_name[0] == '\0') {
3022                 stream_name = NULL;
3023         }
3024
3025         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3026                                             stream_name, NULL, &smb_fname);
3027         if (!NT_STATUS_IS_OK(status)) {
3028                 return;
3029         }
3030
3031         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3032                 "file_id %s\n",
3033                 sharepath, smb_fname_str_dbg(smb_fname),
3034                 file_id_string_tos(&id)));
3035
3036         for(fsp = file_find_di_first(sconn, id); fsp;
3037             fsp = file_find_di_next(fsp)) {
3038                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3039
3040                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3041                                 fsp->fnum, fsp_str_dbg(fsp),
3042                                 smb_fname_str_dbg(smb_fname)));
3043                         status = fsp_set_smb_fname(fsp, smb_fname);
3044                         if (!NT_STATUS_IS_OK(status)) {
3045                                 goto out;
3046                         }
3047                 } else {
3048                         /* TODO. JRA. */
3049                         /* Now we have the complete path we can work out if this is
3050                            actually within this share and adjust newname accordingly. */
3051                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3052                                 "not sharepath %s) "
3053                                 "fnum %d from %s -> %s\n",
3054                                 fsp->conn->connectpath,
3055                                 sharepath,
3056                                 fsp->fnum,
3057                                 fsp_str_dbg(fsp),
3058                                 smb_fname_str_dbg(smb_fname)));
3059                 }
3060         }
3061  out:
3062         TALLOC_FREE(smb_fname);
3063         return;
3064 }
3065
3066 /*
3067  * If a main file is opened for delete, all streams need to be checked for
3068  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3069  * If that works, delete them all by setting the delete on close and close.
3070  */
3071
3072 NTSTATUS open_streams_for_delete(connection_struct *conn,
3073                                         const char *fname)
3074 {
3075         struct stream_struct *stream_info = NULL;
3076         files_struct **streams = NULL;
3077         int i;
3078         unsigned int num_streams = 0;
3079         TALLOC_CTX *frame = talloc_stackframe();
3080         NTSTATUS status;
3081
3082         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3083                                 &num_streams, &stream_info);
3084
3085         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3086             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3087                 DEBUG(10, ("no streams around\n"));
3088                 TALLOC_FREE(frame);
3089                 return NT_STATUS_OK;
3090         }
3091
3092         if (!NT_STATUS_IS_OK(status)) {
3093                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3094                            nt_errstr(status)));
3095                 goto fail;
3096         }
3097
3098         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3099                    num_streams));
3100
3101         if (num_streams == 0) {
3102                 TALLOC_FREE(frame);
3103                 return NT_STATUS_OK;
3104         }
3105
3106         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3107         if (streams == NULL) {
3108                 DEBUG(0, ("talloc failed\n"));
3109                 status = NT_STATUS_NO_MEMORY;
3110                 goto fail;
3111         }
3112
3113         for (i=0; i<num_streams; i++) {
3114                 struct smb_filename *smb_fname = NULL;
3115
3116                 if (strequal(stream_info[i].name, "::$DATA")) {
3117                         streams[i] = NULL;
3118                         continue;
3119                 }
3120
3121                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3122                                                     stream_info[i].name,
3123                                                     NULL, &smb_fname);
3124                 if (!NT_STATUS_IS_OK(status)) {
3125                         goto fail;
3126                 }
3127
3128                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3129                         DEBUG(10, ("Unable to stat stream: %s\n",
3130                                    smb_fname_str_dbg(smb_fname)));
3131                 }
3132
3133                 status = SMB_VFS_CREATE_FILE(
3134                          conn,                  /* conn */
3135                          NULL,                  /* req */
3136                          0,                     /* root_dir_fid */
3137                          smb_fname,             /* fname */
3138                          DELETE_ACCESS,         /* access_mask */
3139                          (FILE_SHARE_READ |     /* share_access */
3140                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3141                          FILE_OPEN,             /* create_disposition*/
3142                          0,                     /* create_options */
3143                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3144                          0,                     /* oplock_request */
3145                          0,                     /* allocation_size */
3146                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3147                          NULL,                  /* sd */
3148                          NULL,                  /* ea_list */
3149                          &streams[i],           /* result */
3150                          NULL);                 /* pinfo */
3151
3152                 if (!NT_STATUS_IS_OK(status)) {
3153                         DEBUG(10, ("Could not open stream %s: %s\n",
3154                                    smb_fname_str_dbg(smb_fname),
3155                                    nt_errstr(status)));
3156
3157                         TALLOC_FREE(smb_fname);
3158                         break;
3159                 }
3160                 TALLOC_FREE(smb_fname);
3161         }
3162
3163         /*
3164          * don't touch the variable "status" beyond this point :-)
3165          */
3166
3167         for (i -= 1 ; i >= 0; i--) {
3168                 if (streams[i] == NULL) {
3169                         continue;
3170                 }
3171
3172                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3173                            fsp_str_dbg(streams[i])));
3174                 close_file(NULL, streams[i], NORMAL_CLOSE);
3175         }
3176
3177  fail:
3178         TALLOC_FREE(frame);
3179         return status;
3180 }
3181
3182 /*********************************************************************
3183  Create a default ACL by inheriting from the parent. If no inheritance
3184  from the parent available, don't set anything. This will leave the actual
3185  permissions the new file or directory already got from the filesystem
3186  as the NT ACL when read.
3187 *********************************************************************/
3188
3189 static NTSTATUS inherit_new_acl(files_struct *fsp)
3190 {
3191         TALLOC_CTX *ctx = talloc_tos();
3192         char *parent_name = NULL;
3193         struct security_descriptor *parent_desc = NULL;
3194         NTSTATUS status = NT_STATUS_OK;
3195         struct security_descriptor *psd = NULL;
3196         struct dom_sid *owner_sid = NULL;
3197         struct dom_sid *group_sid = NULL;
3198         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3199         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3200         bool inheritable_components = false;
3201         size_t size = 0;
3202
3203         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3204                 return NT_STATUS_NO_MEMORY;
3205         }
3206
3207         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3208                                 parent_name,
3209                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3210                                 &parent_desc);
3211         if (!NT_STATUS_IS_OK(status)) {
3212                 return status;
3213         }
3214
3215         inheritable_components = sd_has_inheritable_components(parent_desc,
3216                                         fsp->is_directory);
3217
3218         if (!inheritable_components && !inherit_owner) {
3219                 /* Nothing to inherit and not setting owner. */
3220                 return NT_STATUS_OK;
3221         }
3222
3223         /* Create an inherited descriptor from the parent. */
3224
3225         if (DEBUGLEVEL >= 10) {
3226                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3227                         fsp_str_dbg(fsp) ));
3228                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3229         }
3230
3231         /* Inherit from parent descriptor if "inherit owner" set. */
3232         if (inherit_owner) {
3233                 owner_sid = parent_desc->owner_sid;
3234                 group_sid = parent_desc->group_sid;
3235         }
3236
3237         if (owner_sid == NULL) {
3238                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3239         }
3240         if (group_sid == NULL) {
3241                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3242         }
3243
3244         status = se_create_child_secdesc(ctx,
3245                         &psd,
3246                         &size,
3247                         parent_desc,
3248                         owner_sid,
3249                         group_sid,
3250                         fsp->is_directory);
3251         if (!NT_STATUS_IS_OK(status)) {
3252                 return status;
3253         }
3254
3255         /* If inheritable_components == false,
3256            se_create_child_secdesc()
3257            creates a security desriptor with a NULL dacl
3258            entry, but with SEC_DESC_DACL_PRESENT. We need
3259            to remove that flag. */
3260
3261         if (!inheritable_components) {
3262                 security_info_sent &= ~SECINFO_DACL;
3263                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3264         }
3265
3266         if (DEBUGLEVEL >= 10) {
3267                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3268                         fsp_str_dbg(fsp) ));
3269                 NDR_PRINT_DEBUG(security_descriptor, psd);
3270         }
3271
3272         if (inherit_owner) {
3273                 /* We need to be root to force this. */
3274                 become_root();
3275         }
3276         status = SMB_VFS_FSET_NT_ACL(fsp,
3277                         security_info_sent,
3278                         psd);
3279         if (inherit_owner) {
3280                 unbecome_root();
3281         }
3282         return status;
3283 }
3284
3285 /*
3286  * Wrapper around open_file_ntcreate and open_directory
3287  */
3288
3289 static NTSTATUS create_file_unixpath(connection_struct *conn,
3290                                      struct smb_request *req,
3291                                      struct smb_filename *smb_fname,
3292                                      uint32_t access_mask,
3293                                      uint32_t share_access,
3294                                      uint32_t create_disposition,
3295                                      uint32_t create_options,
3296                                      uint32_t file_attributes,
3297                                      uint32_t oplock_request,
3298                                      uint64_t allocation_size,
3299                                      uint32_t private_flags,
3300                                      struct security_descriptor *sd,
3301                                      struct ea_list *ea_list,
3302
3303                                      files_struct **result,
3304                                      int *pinfo)
3305 {
3306         int info = FILE_WAS_OPENED;
3307         files_struct *base_fsp = NULL;
3308         files_struct *fsp = NULL;
3309         NTSTATUS status;
3310
3311         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3312                   "file_attributes = 0x%x, share_access = 0x%x, "
3313                   "create_disposition = 0x%x create_options = 0x%x "
3314                   "oplock_request = 0x%x private_flags = 0x%x "
3315                   "ea_list = 0x%p, sd = 0x%p, "
3316                   "fname = %s\n",
3317                   (unsigned int)access_mask,
3318                   (unsigned int)file_attributes,
3319                   (unsigned int)share_access,
3320                   (unsigned int)create_disposition,
3321                   (unsigned int)create_options,
3322                   (unsigned int)oplock_request,
3323                   (unsigned int)private_flags,
3324                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3325
3326         if (create_options & FILE_OPEN_BY_FILE_ID) {
3327                 status = NT_STATUS_NOT_SUPPORTED;
3328                 goto fail;
3329         }
3330
3331         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3332                 status = NT_STATUS_INVALID_PARAMETER;
3333                 goto fail;
3334         }
3335
3336         if (req == NULL) {
3337                 oplock_request |= INTERNAL_OPEN_ONLY;
3338         }
3339
3340         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3341             && (access_mask & DELETE_ACCESS)
3342             && !is_ntfs_stream_smb_fname(smb_fname)) {
3343                 /*
3344                  * We can't open a file with DELETE access if any of the
3345                  * streams is open without FILE_SHARE_DELETE
3346                  */
3347                 status = open_streams_for_delete(conn, smb_fname->base_name);
3348
3349                 if (!NT_STATUS_IS_OK(status)) {
3350                         goto fail;
3351                 }
3352         }
3353
3354         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3355                         !security_token_has_privilege(get_current_nttok(conn),
3356                                         SEC_PRIV_SECURITY)) {
3357                 DEBUG(10, ("create_file_unixpath: open on %s "
3358                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3359                         smb_fname_str_dbg(smb_fname)));
3360                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3361                 goto fail;
3362         }
3363
3364         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3365             && is_ntfs_stream_smb_fname(smb_fname)
3366             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3367                 uint32 base_create_disposition;
3368                 struct smb_filename *smb_fname_base = NULL;
3369
3370                 if (create_options & FILE_DIRECTORY_FILE) {
3371                         status = NT_STATUS_NOT_A_DIRECTORY;
3372                         goto fail;
3373                 }
3374
3375                 switch (create_disposition) {
3376                 case FILE_OPEN:
3377                         base_create_disposition = FILE_OPEN;
3378                         break;
3379                 default:
3380                         base_create_disposition = FILE_OPEN_IF;
3381                         break;
3382                 }
3383
3384                 /* Create an smb_filename with stream_name == NULL. */
3385                 status = create_synthetic_smb_fname(talloc_tos(),
3386                                                     smb_fname->base_name,
3387                                                     NULL, NULL,
3388                                                     &smb_fname_base);
3389                 if (!NT_STATUS_IS_OK(status)) {
3390                         goto fail;
3391                 }
3392
3393                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3394                         DEBUG(10, ("Unable to stat stream: %s\n",
3395                                    smb_fname_str_dbg(smb_fname_base)));
3396                 }
3397
3398                 /* Open the base file. */
3399                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3400                                               FILE_SHARE_READ
3401                                               | FILE_SHARE_WRITE
3402                                               | FILE_SHARE_DELETE,
3403                                               base_create_disposition,
3404                                               0, 0, 0, 0, 0, NULL, NULL,
3405                                               &base_fsp, NULL);
3406                 TALLOC_FREE(smb_fname_base);
3407
3408                 if (!NT_STATUS_IS_OK(status)) {
3409                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3410                                    "%s\n", smb_fname->base_name,
3411                                    nt_errstr(status)));
3412                         goto fail;
3413                 }
3414                 /* we don't need to low level fd */
3415                 fd_close(base_fsp);
3416         }
3417
3418         /*
3419          * If it's a request for a directory open, deal with it separately.
3420          */
3421
3422         if (create_options & FILE_DIRECTORY_FILE) {
3423
3424                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3425                         status = NT_STATUS_INVALID_PARAMETER;
3426                         goto fail;
3427                 }
3428
3429                 /* Can't open a temp directory. IFS kit test. */
3430                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3431                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3432                         status = NT_STATUS_INVALID_PARAMETER;
3433                         goto fail;
3434                 }
3435
3436                 /*
3437                  * We will get a create directory here if the Win32
3438                  * app specified a security descriptor in the
3439                  * CreateDirectory() call.
3440                  */
3441
3442                 oplock_request = 0;
3443                 status = open_directory(
3444                         conn, req, smb_fname, access_mask, share_access,
3445                         create_disposition, create_options, file_attributes,
3446                         &info, &fsp);
3447         } else {
3448
3449                 /*
3450                  * Ordinary file case.
3451                  */
3452
3453                 status = file_new(req, conn, &fsp);
3454                 if(!NT_STATUS_IS_OK(status)) {
3455                         goto fail;
3456                 }
3457
3458                 status = fsp_set_smb_fname(fsp, smb_fname);
3459                 if (!NT_STATUS_IS_OK(status)) {
3460                         goto fail;
3461                 }
3462
3463                 /*
3464                  * We're opening the stream element of a base_fsp
3465                  * we already opened. Set up the base_fsp pointer.
3466                  */
3467                 if (base_fsp) {
3468                         fsp->base_fsp = base_fsp;
3469                 }
3470
3471                 status = open_file_ntcreate(conn,
3472                                             req,
3473                                             access_mask,
3474                                             share_access,
3475                                             create_disposition,
3476                                             create_options,
3477                                             file_attributes,
3478                                             oplock_request,
3479                                             private_flags,
3480                                             &info,
3481                                             fsp);
3482
3483                 if(!NT_STATUS_IS_OK(status)) {
3484                         file_free(req, fsp);
3485                         fsp = NULL;
3486                 }
3487
3488                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3489
3490                         /* A stream open never opens a directory */
3491
3492                         if (base_fsp) {
3493                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3494                                 goto fail;
3495                         }
3496
3497                         /*
3498                          * Fail the open if it was explicitly a non-directory
3499                          * file.
3500                          */
3501
3502                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3503                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3504                                 goto fail;
3505                         }
3506
3507                         oplock_request = 0;
3508                         status = open_directory(
3509                                 conn, req, smb_fname, access_mask,
3510                                 share_access, create_disposition,
3511                                 create_options, file_attributes,
3512                                 &info, &fsp);
3513                 }
3514         }
3515
3516         if (!NT_STATUS_IS_OK(status)) {
3517                 goto fail;
3518         }
3519
3520         fsp->base_fsp = base_fsp;
3521
3522         if ((ea_list != NULL) &&
3523             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3524                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3525                 if (!NT_STATUS_IS_OK(status)) {
3526                         goto fail;
3527                 }
3528         }
3529
3530         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3531                 status = NT_STATUS_ACCESS_DENIED;
3532                 goto fail;
3533         }
3534
3535         /* Save the requested allocation size. */
3536         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3537                 if (allocation_size
3538                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3539                         fsp->initial_allocation_size = smb_roundup(
3540                                 fsp->conn, allocation_size);
3541                         if (fsp->is_directory) {
3542                                 /* Can't set allocation size on a directory. */
3543                                 status = NT_STATUS_ACCESS_DENIED;
3544                                 goto fail;
3545                         }
3546                         if (vfs_allocate_file_space(
3547                                     fsp, fsp->initial_allocation_size) == -1) {
3548                                 status = NT_STATUS_DISK_FULL;
3549                                 goto fail;
3550                         }
3551                 } else {
3552                         fsp->initial_allocation_size = smb_roundup(
3553                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3554                 }
3555         }
3556
3557         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3558                                 fsp->base_fsp == NULL) {
3559                 if (sd != NULL) {
3560                         /*
3561                          * According to the MS documentation, the only time the security
3562                          * descriptor is applied to the opened file is iff we *created* the
3563                          * file; an existing file stays the same.
3564                          *
3565                          * Also, it seems (from observation) that you can open the file with
3566                          * any access mask but you can still write the sd. We need to override
3567                          * the granted access before we call set_sd
3568                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3569                          */
3570
3571                         uint32_t sec_info_sent;
3572                         uint32_t saved_access_mask = fsp->access_mask;
3573
3574                         sec_info_sent = get_sec_info(sd);
3575
3576                         fsp->access_mask = FILE_GENERIC_ALL;
3577
3578                         /* Convert all the generic bits. */
3579                         security_acl_map_generic(sd->dacl, &file_generic_mapping);
3580                         security_acl_map_generic(sd->sacl, &file_generic_mapping);
3581
3582                         if (sec_info_sent & (SECINFO_OWNER|
3583                                                 SECINFO_GROUP|
3584                                                 SECINFO_DACL|
3585                                                 SECINFO_SACL)) {
3586                                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3587                         }
3588
3589                         fsp->access_mask = saved_access_mask;
3590
3591                         if (!NT_STATUS_IS_OK(status)) {
3592                                 goto fail;
3593                         }
3594                 } else if (lp_inherit_acls(SNUM(conn))) {
3595                         /* Inherit from parent. Errors here are not fatal. */
3596                         status = inherit_new_acl(fsp);
3597                         if (!NT_STATUS_IS_OK(status)) {
3598                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3599                                         fsp_str_dbg(fsp),
3600                                         nt_errstr(status) ));
3601                         }
3602                 }
3603         }
3604
3605         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3606
3607         *result = fsp;
3608         if (pinfo != NULL) {
3609                 *pinfo = info;
3610         }
3611
3612         smb_fname->st = fsp->fsp_name->st;
3613
3614         return NT_STATUS_OK;
3615
3616  fail:
3617         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3618
3619         if (fsp != NULL) {
3620                 if (base_fsp && fsp->base_fsp == base_fsp) {
3621                         /*
3622                          * The close_file below will close
3623                          * fsp->base_fsp.
3624                          */
3625                         base_fsp = NULL;
3626                 }
3627                 close_file(req, fsp, ERROR_CLOSE);
3628                 fsp = NULL;
3629         }
3630         if (base_fsp != NULL) {
3631                 close_file(req, base_fsp, ERROR_CLOSE);
3632                 base_fsp = NULL;
3633         }
3634         return status;
3635 }
3636
3637 /*
3638  * Calculate the full path name given a relative fid.
3639  */
3640 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3641                                    struct smb_request *req,
3642                                    uint16_t root_dir_fid,
3643                                    const struct smb_filename *smb_fname,
3644                                    struct smb_filename **smb_fname_out)
3645 {
3646         files_struct *dir_fsp;
3647         char *parent_fname = NULL;
3648         char *new_base_name = NULL;
3649         NTSTATUS status;
3650
3651         if (root_dir_fid == 0 || !smb_fname) {
3652                 status = NT_STATUS_INTERNAL_ERROR;
3653                 goto out;
3654         }
3655
3656         dir_fsp = file_fsp(req, root_dir_fid);
3657
3658         if (dir_fsp == NULL) {
3659                 status = NT_STATUS_INVALID_HANDLE;
3660                 goto out;
3661         }
3662
3663         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3664                 status = NT_STATUS_INVALID_HANDLE;
3665                 goto out;
3666         }
3667
3668         if (!dir_fsp->is_directory) {
3669
3670                 /*
3671                  * Check to see if this is a mac fork of some kind.
3672                  */
3673
3674                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3675                     is_ntfs_stream_smb_fname(smb_fname)) {
3676                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3677                         goto out;
3678                 }
3679
3680                 /*
3681                   we need to handle the case when we get a
3682                   relative open relative to a file and the
3683                   pathname is blank - this is a reopen!
3684                   (hint from demyn plantenberg)
3685                 */
3686
3687                 status = NT_STATUS_INVALID_HANDLE;
3688                 goto out;
3689         }
3690
3691         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3692                 /*
3693                  * We're at the toplevel dir, the final file name
3694                  * must not contain ./, as this is filtered out
3695                  * normally by srvstr_get_path and unix_convert
3696                  * explicitly rejects paths containing ./.
3697                  */
3698                 parent_fname = talloc_strdup(talloc_tos(), "");
3699                 if (parent_fname == NULL) {
3700                         status = NT_STATUS_NO_MEMORY;
3701                         goto out;
3702                 }
3703         } else {
3704                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3705
3706                 /*
3707                  * Copy in the base directory name.
3708                  */
3709
3710                 parent_fname = talloc_array(talloc_tos(), char,
3711                     dir_name_len+2);
3712                 if (parent_fname == NULL) {
3713                         status = NT_STATUS_NO_MEMORY;
3714                         goto out;
3715                 }
3716                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3717                     dir_name_len+1);
3718
3719                 /*
3720                  * Ensure it ends in a '/'.
3721                  * We used TALLOC_SIZE +2 to add space for the '/'.
3722                  */
3723
3724                 if(dir_name_len
3725                     && (parent_fname[dir_name_len-1] != '\\')
3726                     && (parent_fname[dir_name_len-1] != '/')) {
3727                         parent_fname[dir_name_len] = '/';
3728                         parent_fname[dir_name_len+1] = '\0';
3729                 }
3730         }
3731
3732         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3733                                         smb_fname->base_name);
3734         if (new_base_name == NULL) {
3735                 status = NT_STATUS_NO_MEMORY;
3736                 goto out;
3737         }
3738
3739         status = filename_convert(req,
3740                                 conn,
3741                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3742                                 new_base_name,
3743                                 0,
3744                                 NULL,
3745                                 smb_fname_out);
3746         if (!NT_STATUS_IS_OK(status)) {
3747                 goto out;
3748         }
3749
3750  out:
3751         TALLOC_FREE(parent_fname);
3752         TALLOC_FREE(new_base_name);
3753         return status;
3754 }
3755
3756 NTSTATUS create_file_default(connection_struct *conn,
3757                              struct smb_request *req,
3758                              uint16_t root_dir_fid,
3759                              struct smb_filename *smb_fname,
3760                              uint32_t access_mask,
3761                              uint32_t share_access,
3762                              uint32_t create_disposition,
3763                              uint32_t create_options,
3764                              uint32_t file_attributes,
3765                              uint32_t oplock_request,
3766                              uint64_t allocation_size,
3767                              uint32_t private_flags,
3768                              struct security_descriptor *sd,
3769                              struct ea_list *ea_list,
3770                              files_struct **result,
3771                              int *pinfo)
3772 {
3773         int info = FILE_WAS_OPENED;
3774         files_struct *fsp = NULL;
3775         NTSTATUS status;
3776         bool stream_name = false;
3777
3778         DEBUG(10,("create_file: access_mask = 0x%x "
3779                   "file_attributes = 0x%x, share_access = 0x%x, "
3780                   "create_disposition = 0x%x create_options = 0x%x "
3781                   "oplock_request = 0x%x "
3782                   "private_flags = 0x%x "
3783                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3784                   "fname = %s\n",
3785                   (unsigned int)access_mask,
3786                   (unsigned int)file_attributes,
3787                   (unsigned int)share_access,
3788                   (unsigned int)create_disposition,
3789                   (unsigned int)create_options,
3790                   (unsigned int)oplock_request,
3791                   (unsigned int)private_flags,
3792                   (unsigned int)root_dir_fid,
3793                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3794
3795         /*
3796          * Calculate the filename from the root_dir_if if necessary.
3797          */
3798
3799         if (root_dir_fid != 0) {
3800                 struct smb_filename *smb_fname_out = NULL;
3801                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3802                                                    smb_fname, &smb_fname_out);
3803                 if (!NT_STATUS_IS_OK(status)) {
3804                         goto fail;
3805                 }
3806                 smb_fname = smb_fname_out;
3807         }
3808
3809         /*
3810          * Check to see if this is a mac fork of some kind.
3811          */
3812
3813         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3814         if (stream_name) {
3815                 enum FAKE_FILE_TYPE fake_file_type;
3816
3817                 fake_file_type = is_fake_file(smb_fname);
3818
3819                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3820
3821                         /*
3822                          * Here we go! support for changing the disk quotas
3823                          * --metze
3824                          *
3825                          * We need to fake up to open this MAGIC QUOTA file
3826                          * and return a valid FID.
3827                          *
3828                          * w2k close this file directly after openening xp
3829                          * also tries a QUERY_FILE_INFO on the file and then
3830                          * close it
3831                          */
3832                         status = open_fake_file(req, conn, req->vuid,
3833                                                 fake_file_type, smb_fname,
3834                                                 access_mask, &fsp);
3835                         if (!NT_STATUS_IS_OK(status)) {
3836                                 goto fail;
3837                         }
3838
3839                         ZERO_STRUCT(smb_fname->st);
3840                         goto done;
3841                 }
3842
3843                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3844                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3845                         goto fail;
3846                 }
3847         }
3848
3849         /* All file access must go through check_name() */
3850
3851         status = check_name(conn, smb_fname->base_name);
3852         if (!NT_STATUS_IS_OK(status)) {
3853                 goto fail;
3854         }
3855
3856         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3857                 int ret;
3858                 smb_fname->stream_name = NULL;
3859                 /* We have to handle this error here. */
3860                 if (create_options & FILE_DIRECTORY_FILE) {
3861                         status = NT_STATUS_NOT_A_DIRECTORY;
3862                         goto fail;
3863                 }
3864                 if (lp_posix_pathnames()) {
3865                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3866                 } else {
3867                         ret = SMB_VFS_STAT(conn, smb_fname);
3868                 }
3869
3870                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3871                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3872                         goto fail;
3873                 }
3874         }
3875
3876         status = create_file_unixpath(
3877                 conn, req, smb_fname, access_mask, share_access,
3878                 create_disposition, create_options, file_attributes,
3879                 oplock_request, allocation_size, private_flags,
3880                 sd, ea_list,
3881                 &fsp, &info);
3882
3883         if (!NT_STATUS_IS_OK(status)) {
3884                 goto fail;
3885         }
3886
3887  done:
3888         DEBUG(10, ("create_file: info=%d\n", info));
3889
3890         *result = fsp;
3891         if (pinfo != NULL) {
3892                 *pinfo = info;
3893         }
3894         return NT_STATUS_OK;
3895
3896  fail:
3897         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3898
3899         if (fsp != NULL) {
3900                 close_file(req, fsp, ERROR_CLOSE);
3901                 fsp = NULL;
3902         }
3903         return status;
3904 }