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 "printing.h"
  24 #include "smbd/globals.h"
  25 #include "fake_file.h"
  26 #include "librpc/gen_ndr/messaging.h"
  27 #include "../libcli/security/security.h"
  28 #include "../librpc/gen_ndr/ndr_security.h"
  29
  30 extern const struct generic_mapping file_generic_mapping;
  31
  32 struct deferred_open_record {
  33         bool delayed_for_oplocks;
  34         struct file_id id;
  35 };
  36
  37 /****************************************************************************
  38  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
  39 ****************************************************************************/
  40
  41 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
  42                                 const struct security_descriptor *sd,
  43                                 const struct security_token *token,
  44                                 uint32_t access_desired,
  45                                 uint32_t *access_granted)
  46 {
  47         *access_granted = 0;
  48
  49         if (get_current_uid(conn) == (uid_t)0) {
  50                 /* I'm sorry sir, I didn't know you were root... */
  51                 *access_granted = access_desired;
  52                 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
  53                         *access_granted |= FILE_GENERIC_ALL;
  54                 }
  55                 return NT_STATUS_OK;
  56         }
  57
  58         return se_access_check(sd,
  59                                 token,
  60                                 (access_desired & ~FILE_READ_ATTRIBUTES),
  61                                 access_granted);
  62 }
  63
  64 /****************************************************************************
  65  Check if we have open rights.
  66 ****************************************************************************/
  67
  68 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
  69                                 const struct smb_filename *smb_fname,
  70                                 uint32_t access_mask,
  71                                 uint32_t *access_granted)
  72 {
  73         /* Check if we have rights to open. */
  74         NTSTATUS status;
  75         struct security_descriptor *sd = NULL;
  76
  77         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
  78                         (SECINFO_OWNER |
  79                         SECINFO_GROUP |
  80                         SECINFO_DACL),&sd);
  81
  82         if (!NT_STATUS_IS_OK(status)) {
  83                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
  84                         "on %s: %s\n",
  85                         smb_fname_str_dbg(smb_fname),
  86                         nt_errstr(status)));
  87                 return status;
  88         }
  89
  90         status = smb1_file_se_access_check(conn,
  91                                 sd,
  92                                 get_current_nttok(conn),
  93                                 access_mask,
  94                                 access_granted);
  95
  96         DEBUG(10,("smbd_check_open_rights: file %s requesting "
  97                 "0x%x returning 0x%x (%s)\n",
  98                 smb_fname_str_dbg(smb_fname),
  99                 (unsigned int)access_mask,
 100                 (unsigned int)*access_granted,
 101                 nt_errstr(status) ));
 102
 103         if (!NT_STATUS_IS_OK(status)) {
 104                 if (DEBUGLEVEL >= 10) {
 105                         DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
 106                                 smb_fname_str_dbg(smb_fname) ));
 107                         NDR_PRINT_DEBUG(security_descriptor, sd);
 108                 }
 109         }
 110
 111         TALLOC_FREE(sd);
 112
 113         return status;
 114 }
 115
 116 /****************************************************************************
 117  fd support routines - attempt to do a dos_open.
 118 ****************************************************************************/
 119
 120 static NTSTATUS fd_open(struct connection_struct *conn,
 121                     files_struct *fsp,
 122                     int flags,
 123                     mode_t mode)
 124 {
 125         struct smb_filename *smb_fname = fsp->fsp_name;
 126         NTSTATUS status = NT_STATUS_OK;
 127
 128 #ifdef O_NOFOLLOW
 129         /*
 130          * Never follow symlinks on a POSIX client. The
 131          * client should be doing this.
 132          */
 133
 134         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 135                 flags |= O_NOFOLLOW;
 136         }
 137 #endif
 138
 139         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 140         if (fsp->fh->fd == -1) {
 141                 status = map_nt_error_from_unix(errno);
 142                 if (errno == EMFILE) {
 143                         static time_t last_warned = 0L;
 144
 145                         if (time((time_t *) NULL) > last_warned) {
 146                                 DEBUG(0,("Too many open files, unable "
 147                                         "to open more!  smbd's max "
 148                                         "open files = %d\n",
 149                                         lp_max_open_files()));
 150                                 last_warned = time((time_t *) NULL);
 151                         }
 152                 }
 153
 154         }
 155
 156         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 157                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 158                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 159
 160         return status;
 161 }
 162
 163 /****************************************************************************
 164  Close the file associated with a fsp.
 165 ****************************************************************************/
 166
 167 NTSTATUS fd_close(files_struct *fsp)
 168 {
 169         int ret;
 170
 171         if (fsp->dptr) {
 172                 dptr_CloseDir(fsp);
 173         }
 174         if (fsp->fh->fd == -1) {
 175                 return NT_STATUS_OK; /* What we used to call a stat open. */
 176         }
 177         if (fsp->fh->ref_count > 1) {
 178                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 179         }
 180
 181         ret = SMB_VFS_CLOSE(fsp);
 182         fsp->fh->fd = -1;
 183         if (ret == -1) {
 184                 return map_nt_error_from_unix(errno);
 185         }
 186         return NT_STATUS_OK;
 187 }
 188
 189 /****************************************************************************
 190  Change the ownership of a file to that of the parent directory.
 191  Do this by fd if possible.
 192 ****************************************************************************/
 193
 194 void change_file_owner_to_parent(connection_struct *conn,
 195                                         const char *inherit_from_dir,
 196                                         files_struct *fsp)
 197 {
 198         struct smb_filename *smb_fname_parent = NULL;
 199         NTSTATUS status;
 200         int ret;
 201
 202         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 203                                             NULL, NULL, &smb_fname_parent);
 204         if (!NT_STATUS_IS_OK(status)) {
 205                 return;
 206         }
 207
 208         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 209         if (ret == -1) {
 210                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 211                          "directory %s. Error was %s\n",
 212                          smb_fname_str_dbg(smb_fname_parent),
 213                          strerror(errno)));
 214                 return;
 215         }
 216
 217         become_root();
 218         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 219         unbecome_root();
 220         if (ret == -1) {
 221                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 222                          "file %s to parent directory uid %u. Error "
 223                          "was %s\n", fsp_str_dbg(fsp),
 224                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 225                          strerror(errno) ));
 226         }
 227
 228         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 229                   "parent directory uid %u.\n", fsp_str_dbg(fsp),
 230                   (unsigned int)smb_fname_parent->st.st_ex_uid));
 231
 232         TALLOC_FREE(smb_fname_parent);
 233 }
 234
 235 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 236                                        const char *inherit_from_dir,
 237                                        const char *fname,
 238                                        SMB_STRUCT_STAT *psbuf)
 239 {
 240         struct smb_filename *smb_fname_parent = NULL;
 241         struct smb_filename *smb_fname_cwd = NULL;
 242         char *saved_dir = NULL;
 243         TALLOC_CTX *ctx = talloc_tos();
 244         NTSTATUS status = NT_STATUS_OK;
 245         int ret;
 246
 247         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 248                                             &smb_fname_parent);
 249         if (!NT_STATUS_IS_OK(status)) {
 250                 return status;
 251         }
 252
 253         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 254         if (ret == -1) {
 255                 status = map_nt_error_from_unix(errno);
 256                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 257                          "directory %s. Error was %s\n",
 258                          smb_fname_str_dbg(smb_fname_parent),
 259                          strerror(errno)));
 260                 goto out;
 261         }
 262
 263         /* We've already done an lstat into psbuf, and we know it's a
 264            directory. If we can cd into the directory and the dev/ino
 265            are the same then we can safely chown without races as
 266            we're locking the directory in place by being in it.  This
 267            should work on any UNIX (thanks tridge :-). JRA.
 268         */
 269
 270         saved_dir = vfs_GetWd(ctx,conn);
 271         if (!saved_dir) {
 272                 status = map_nt_error_from_unix(errno);
 273                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 274                          "current working directory. Error was %s\n",
 275                          strerror(errno)));
 276                 goto out;
 277         }
 278
 279         /* Chdir into the new path. */
 280         if (vfs_ChDir(conn, fname) == -1) {
 281                 status = map_nt_error_from_unix(errno);
 282                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 283                          "current working directory to %s. Error "
 284                          "was %s\n", fname, strerror(errno) ));
 285                 goto chdir;
 286         }
 287
 288         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 289                                             &smb_fname_cwd);
 290         if (!NT_STATUS_IS_OK(status)) {
 291                 return status;
 292         }
 293
 294         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 295         if (ret == -1) {
 296                 status = map_nt_error_from_unix(errno);
 297                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 298                          "directory '.' (%s) Error was %s\n",
 299                          fname, strerror(errno)));
 300                 goto chdir;
 301         }
 302
 303         /* Ensure we're pointing at the same place. */
 304         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 305             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
 306             smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
 307                 DEBUG(0,("change_dir_owner_to_parent: "
 308                          "device/inode/mode on directory %s changed. "
 309                          "Refusing to chown !\n", fname ));
 310                 status = NT_STATUS_ACCESS_DENIED;
 311                 goto chdir;
 312         }
 313
 314         become_root();
 315         ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 316                             (gid_t)-1);
 317         unbecome_root();
 318         if (ret == -1) {
 319                 status = map_nt_error_from_unix(errno);
 320                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 321                           "directory %s to parent directory uid %u. "
 322                           "Error was %s\n", fname,
 323                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 324                           strerror(errno) ));
 325                 goto chdir;
 326         }
 327
 328         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 329                   "directory %s to parent directory uid %u.\n",
 330                   fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 331
 332  chdir:
 333         vfs_ChDir(conn,saved_dir);
 334  out:
 335         TALLOC_FREE(smb_fname_parent);
 336         TALLOC_FREE(smb_fname_cwd);
 337         return status;
 338 }
 339
 340 /****************************************************************************
 341  Open a file.
 342 ****************************************************************************/
 343
 344 static NTSTATUS open_file(files_struct *fsp,
 345                           connection_struct *conn,
 346                           struct smb_request *req,
 347                           const char *parent_dir,
 348                           int flags,
 349                           mode_t unx_mode,
 350                           uint32 access_mask, /* client requested access mask. */
 351                           uint32 open_access_mask) /* what we're actually using in the open. */
 352 {
 353         struct smb_filename *smb_fname = fsp->fsp_name;
 354         NTSTATUS status = NT_STATUS_OK;
 355         int accmode = (flags & O_ACCMODE);
 356         int local_flags = flags;
 357         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 358
 359         fsp->fh->fd = -1;
 360         errno = EPERM;
 361
 362         /* Check permissions */
 363
 364         /*
 365          * This code was changed after seeing a client open request
 366          * containing the open mode of (DENY_WRITE/read-only) with
 367          * the 'create if not exist' bit set. The previous code
 368          * would fail to open the file read only on a read-only share
 369          * as it was checking the flags parameter  directly against O_RDONLY,
 370          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 371          * JRA.
 372          */
 373
 374         if (!CAN_WRITE(conn)) {
 375                 /* It's a read-only share - fail if we wanted to write. */
 376                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 377                         DEBUG(3,("Permission denied opening %s\n",
 378                                  smb_fname_str_dbg(smb_fname)));
 379                         return NT_STATUS_ACCESS_DENIED;
 380                 } else if(flags & O_CREAT) {
 381                         /* We don't want to write - but we must make sure that
 382                            O_CREAT doesn't create the file if we have write
 383                            access into the directory.
 384                         */
 385                         flags &= ~(O_CREAT|O_EXCL);
 386                         local_flags &= ~(O_CREAT|O_EXCL);
 387                 }
 388         }
 389
 390         /*
 391          * This little piece of insanity is inspired by the
 392          * fact that an NT client can open a file for O_RDONLY,
 393          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 394          * If the client *can* write to the file, then it expects to
 395          * truncate the file, even though it is opening for readonly.
 396          * Quicken uses this stupid trick in backup file creation...
 397          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 398          * for helping track this one down. It didn't bite us in 2.0.x
 399          * as we always opened files read-write in that release. JRA.
 400          */
 401
 402         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 403                 DEBUG(10,("open_file: truncate requested on read-only open "
 404                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 405                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 406         }
 407
 408         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 409             (!file_existed && (local_flags & O_CREAT)) ||
 410             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 411                 const char *wild;
 412
 413                 /*
 414                  * We can't actually truncate here as the file may be locked.
 415                  * open_file_ntcreate will take care of the truncate later. JRA.
 416                  */
 417
 418                 local_flags &= ~O_TRUNC;
 419
 420 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 421                 /*
 422                  * We would block on opening a FIFO with no one else on the
 423                  * other end. Do what we used to do and add O_NONBLOCK to the
 424                  * open flags. JRA.
 425                  */
 426
 427                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 428                         local_flags |= O_NONBLOCK;
 429                 }
 430 #endif
 431
 432                 /* Don't create files with Microsoft wildcard characters. */
 433                 if (fsp->base_fsp) {
 434                         /*
 435                          * wildcard characters are allowed in stream names
 436                          * only test the basefilename
 437                          */
 438                         wild = fsp->base_fsp->fsp_name->base_name;
 439                 } else {
 440                         wild = smb_fname->base_name;
 441                 }
 442                 if ((local_flags & O_CREAT) && !file_existed &&
 443                     ms_has_wild(wild))  {
 444                         return NT_STATUS_OBJECT_NAME_INVALID;
 445                 }
 446
 447                 /* Actually do the open */
 448                 status = fd_open(conn, fsp, local_flags, unx_mode);
 449                 if (!NT_STATUS_IS_OK(status)) {
 450                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 451                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 452                                  nt_errstr(status),local_flags,flags));
 453                         return status;
 454                 }
 455
 456                 if ((local_flags & O_CREAT) && !file_existed) {
 457
 458                         /* Inherit the ACL if required */
 459                         if (lp_inherit_perms(SNUM(conn))) {
 460                                 inherit_access_posix_acl(conn, parent_dir,
 461                                                          smb_fname->base_name,
 462                                                          unx_mode);
 463                         }
 464
 465                         /* Change the owner if required. */
 466                         if (lp_inherit_owner(SNUM(conn))) {
 467                                 change_file_owner_to_parent(conn, parent_dir,
 468                                                             fsp);
 469                         }
 470
 471                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 472                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 473                                      smb_fname->base_name);
 474                 }
 475
 476         } else {
 477                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 478                 if (file_existed) {
 479                         uint32_t access_granted = 0;
 480
 481                         status = smbd_check_open_rights(conn,
 482                                         smb_fname,
 483                                         access_mask,
 484                                         &access_granted);
 485                         if (!NT_STATUS_IS_OK(status)) {
 486                                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 487                                         /*
 488                                          * On NT_STATUS_ACCESS_DENIED, access_granted
 489                                          * contains the denied bits.
 490                                          */
 491
 492                                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 493                                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
 494                                                         (lp_map_readonly(SNUM(conn)) ||
 495                                                          lp_map_archive(SNUM(conn)) ||
 496                                                          lp_map_hidden(SNUM(conn)) ||
 497                                                          lp_map_system(SNUM(conn)))) {
 498                                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
 499
 500                                                 DEBUG(10,("open_file: "
 501                                                           "overrode "
 502                                                           "FILE_WRITE_"
 503                                                           "ATTRIBUTES "
 504                                                           "on file %s\n",
 505                                                           smb_fname_str_dbg(
 506                                                                   smb_fname)));
 507                                         }
 508
 509                                         if ((access_mask & DELETE_ACCESS) &&
 510                                             (access_granted & DELETE_ACCESS) &&
 511                                             can_delete_file_in_directory(conn,
 512                                                 smb_fname)) {
 513                                                 /* Were we trying to do a stat open
 514                                                  * for delete and didn't get DELETE
 515                                                  * access (only) ? Check if the
 516                                                  * directory allows DELETE_CHILD.
 517                                                  * See here:
 518                                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 519                                                  * for details. */
 520
 521                                                 access_granted &= ~DELETE_ACCESS;
 522
 523                                                 DEBUG(10,("open_file: "
 524                                                           "overrode "
 525                                                           "DELETE_ACCESS on "
 526                                                           "file %s\n",
 527                                                           smb_fname_str_dbg(
 528                                                                   smb_fname)));
 529                                         }
 530
 531                                         if (access_granted != 0) {
 532                                                 DEBUG(10,("open_file: Access "
 533                                                           "denied on file "
 534                                                           "%s\n",
 535                                                           smb_fname_str_dbg(
 536                                                                   smb_fname)));
 537                                                 return status;
 538                                         }
 539                                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 540                                     fsp->posix_open &&
 541                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
 542                                         /* This is a POSIX stat open for delete
 543                                          * or rename on a symlink that points
 544                                          * nowhere. Allow. */
 545                                         DEBUG(10,("open_file: allowing POSIX "
 546                                                   "open on bad symlink %s\n",
 547                                                   smb_fname_str_dbg(
 548                                                           smb_fname)));
 549                                 } else {
 550                                         DEBUG(10,("open_file: "
 551                                                   "smbd_check_open_rights on file "
 552                                                   "%s returned %s\n",
 553                                                   smb_fname_str_dbg(smb_fname),
 554                                                   nt_errstr(status) ));
 555                                         return status;
 556                                 }
 557                         }
 558                 }
 559         }
 560
 561         if (!file_existed) {
 562                 int ret;
 563
 564                 if (fsp->fh->fd == -1) {
 565                         ret = SMB_VFS_STAT(conn, smb_fname);
 566                 } else {
 567                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 568                         /* If we have an fd, this stat should succeed. */
 569                         if (ret == -1) {
 570                                 DEBUG(0,("Error doing fstat on open file %s "
 571                                          "(%s)\n",
 572                                          smb_fname_str_dbg(smb_fname),
 573                                          strerror(errno) ));
 574                         }
 575                 }
 576
 577                 /* For a non-io open, this stat failing means file not found. JRA */
 578                 if (ret == -1) {
 579                         status = map_nt_error_from_unix(errno);
 580                         fd_close(fsp);
 581                         return status;
 582                 }
 583         }
 584
 585         /*
 586          * POSIX allows read-only opens of directories. We don't
 587          * want to do this (we use a different code path for this)
 588          * so catch a directory open and return an EISDIR. JRA.
 589          */
 590
 591         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 592                 fd_close(fsp);
 593                 errno = EISDIR;
 594                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 595         }
 596
 597         fsp->mode = smb_fname->st.st_ex_mode;
 598         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 599         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 600         fsp->file_pid = req ? req->smbpid : 0;
 601         fsp->can_lock = True;
 602         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 603         if (!CAN_WRITE(conn)) {
 604                 fsp->can_write = False;
 605         } else {
 606                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 607                         True : False;
 608         }
 609         fsp->print_file = NULL;
 610         fsp->modified = False;
 611         fsp->sent_oplock_break = NO_BREAK_SENT;
 612         fsp->is_directory = False;
 613         if (conn->aio_write_behind_list &&
 614             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 615                        conn->case_sensitive)) {
 616                 fsp->aio_write_behind = True;
 617         }
 618
 619         fsp->wcp = NULL; /* Write cache pointer. */
 620
 621         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 622                  conn->server_info->unix_name,
 623                  smb_fname_str_dbg(smb_fname),
 624                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 625                  conn->num_files_open));
 626
 627         errno = 0;
 628         return NT_STATUS_OK;
 629 }
 630
 631 /*******************************************************************
 632  Return True if the filename is one of the special executable types.
 633 ********************************************************************/
 634
 635 bool is_executable(const char *fname)
 636 {
 637         if ((fname = strrchr_m(fname,'.'))) {
 638                 if (strequal(fname,".com") ||
 639                     strequal(fname,".dll") ||
 640                     strequal(fname,".exe") ||
 641                     strequal(fname,".sym")) {
 642                         return True;
 643                 }
 644         }
 645         return False;
 646 }
 647
 648 /****************************************************************************
 649  Check if we can open a file with a share mode.
 650  Returns True if conflict, False if not.
 651 ****************************************************************************/
 652
 653 static bool share_conflict(struct share_mode_entry *entry,
 654                            uint32 access_mask,
 655                            uint32 share_access)
 656 {
 657         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 658                   "entry->share_access = 0x%x, "
 659                   "entry->private_options = 0x%x\n",
 660                   (unsigned int)entry->access_mask,
 661                   (unsigned int)entry->share_access,
 662                   (unsigned int)entry->private_options));
 663
 664         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 665                   (unsigned int)access_mask, (unsigned int)share_access));
 666
 667         if ((entry->access_mask & (FILE_WRITE_DATA|
 668                                    FILE_APPEND_DATA|
 669                                    FILE_READ_DATA|
 670                                    FILE_EXECUTE|
 671                                    DELETE_ACCESS)) == 0) {
 672                 DEBUG(10,("share_conflict: No conflict due to "
 673                           "entry->access_mask = 0x%x\n",
 674                           (unsigned int)entry->access_mask ));
 675                 return False;
 676         }
 677
 678         if ((access_mask & (FILE_WRITE_DATA|
 679                             FILE_APPEND_DATA|
 680                             FILE_READ_DATA|
 681                             FILE_EXECUTE|
 682                             DELETE_ACCESS)) == 0) {
 683                 DEBUG(10,("share_conflict: No conflict due to "
 684                           "access_mask = 0x%x\n",
 685                           (unsigned int)access_mask ));
 686                 return False;
 687         }
 688
 689 #if 1 /* JRA TEST - Superdebug. */
 690 #define CHECK_MASK(num, am, right, sa, share) \
 691         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 692                 (unsigned int)(num), (unsigned int)(am), \
 693                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 694         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 695                 (unsigned int)(num), (unsigned int)(sa), \
 696                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 697         if (((am) & (right)) && !((sa) & (share))) { \
 698                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 699 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 700                         (unsigned int)(share) )); \
 701                 return True; \
 702         }
 703 #else
 704 #define CHECK_MASK(num, am, right, sa, share) \
 705         if (((am) & (right)) && !((sa) & (share))) { \
 706                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 707 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 708                         (unsigned int)(share) )); \
 709                 return True; \
 710         }
 711 #endif
 712
 713         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 714                    share_access, FILE_SHARE_WRITE);
 715         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 716                    entry->share_access, FILE_SHARE_WRITE);
 717
 718         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 719                    share_access, FILE_SHARE_READ);
 720         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 721                    entry->share_access, FILE_SHARE_READ);
 722
 723         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 724                    share_access, FILE_SHARE_DELETE);
 725         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 726                    entry->share_access, FILE_SHARE_DELETE);
 727
 728         DEBUG(10,("share_conflict: No conflict.\n"));
 729         return False;
 730 }
 731
 732 #if defined(DEVELOPER)
 733 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 734                                       int num,
 735                                       struct share_mode_entry *share_entry)
 736 {
 737         files_struct *fsp;
 738
 739         if (!procid_is_me(&share_entry->pid)) {
 740                 return;
 741         }
 742
 743         if (is_deferred_open_entry(share_entry) &&
 744             !open_was_deferred(share_entry->op_mid)) {
 745                 char *str = talloc_asprintf(talloc_tos(),
 746                         "Got a deferred entry without a request: "
 747                         "PANIC: %s\n",
 748                         share_mode_str(talloc_tos(), num, share_entry));
 749                 smb_panic(str);
 750         }
 751
 752         if (!is_valid_share_mode_entry(share_entry)) {
 753                 return;
 754         }
 755
 756         fsp = file_find_dif(sconn, share_entry->id,
 757                             share_entry->share_file_id);
 758         if (!fsp) {
 759                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 760                          share_mode_str(talloc_tos(), num, share_entry) ));
 761                 smb_panic("validate_my_share_entries: Cannot match a "
 762                           "share entry with an open file\n");
 763         }
 764
 765         if (is_deferred_open_entry(share_entry) ||
 766             is_unused_share_mode_entry(share_entry)) {
 767                 goto panic;
 768         }
 769
 770         if ((share_entry->op_type == NO_OPLOCK) &&
 771             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 772                 /* Someone has already written to it, but I haven't yet
 773                  * noticed */
 774                 return;
 775         }
 776
 777         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 778                 goto panic;
 779         }
 780
 781         return;
 782
 783  panic:
 784         {
 785                 char *str;
 786                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 787                          share_mode_str(talloc_tos(), num, share_entry) ));
 788                 str = talloc_asprintf(talloc_tos(),
 789                         "validate_my_share_entries: "
 790                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 791                          fsp->fsp_name->base_name,
 792                          (unsigned int)fsp->oplock_type,
 793                          (unsigned int)share_entry->op_type );
 794                 smb_panic(str);
 795         }
 796 }
 797 #endif
 798
 799 bool is_stat_open(uint32 access_mask)
 800 {
 801         return (access_mask &&
 802                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 803                                   FILE_WRITE_ATTRIBUTES))==0) &&
 804                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 805                                  FILE_WRITE_ATTRIBUTES)) != 0));
 806 }
 807
 808 /****************************************************************************
 809  Deal with share modes
 810  Invarient: Share mode must be locked on entry and exit.
 811  Returns -1 on error, or number of share modes on success (may be zero).
 812 ****************************************************************************/
 813
 814 static NTSTATUS open_mode_check(connection_struct *conn,
 815                                 struct share_mode_lock *lck,
 816                                 uint32_t name_hash,
 817                                 uint32 access_mask,
 818                                 uint32 share_access,
 819                                 uint32 create_options,
 820                                 bool *file_existed)
 821 {
 822         int i;
 823
 824         if(lck->num_share_modes == 0) {
 825                 return NT_STATUS_OK;
 826         }
 827
 828         *file_existed = True;
 829
 830         /* A delete on close prohibits everything */
 831
 832         if (is_delete_on_close_set(lck, name_hash)) {
 833                 return NT_STATUS_DELETE_PENDING;
 834         }
 835
 836         if (is_stat_open(access_mask)) {
 837                 /* Stat open that doesn't trigger oplock breaks or share mode
 838                  * checks... ! JRA. */
 839                 return NT_STATUS_OK;
 840         }
 841
 842         /*
 843          * Check if the share modes will give us access.
 844          */
 845
 846 #if defined(DEVELOPER)
 847         for(i = 0; i < lck->num_share_modes; i++) {
 848                 validate_my_share_entries(conn->sconn, i,
 849                                           &lck->share_modes[i]);
 850         }
 851 #endif
 852
 853         if (!lp_share_modes(SNUM(conn))) {
 854                 return NT_STATUS_OK;
 855         }
 856
 857         /* Now we check the share modes, after any oplock breaks. */
 858         for(i = 0; i < lck->num_share_modes; i++) {
 859
 860                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 861                         continue;
 862                 }
 863
 864                 /* someone else has a share lock on it, check to see if we can
 865                  * too */
 866                 if (share_conflict(&lck->share_modes[i],
 867                                    access_mask, share_access)) {
 868                         return NT_STATUS_SHARING_VIOLATION;
 869                 }
 870         }
 871
 872         return NT_STATUS_OK;
 873 }
 874
 875 static bool is_delete_request(files_struct *fsp) {
 876         return ((fsp->access_mask == DELETE_ACCESS) &&
 877                 (fsp->oplock_type == NO_OPLOCK));
 878 }
 879
 880 /*
 881  * Send a break message to the oplock holder and delay the open for
 882  * our client.
 883  */
 884
 885 static NTSTATUS send_break_message(files_struct *fsp,
 886                                         struct share_mode_entry *exclusive,
 887                                         uint64_t mid,
 888                                         int oplock_request)
 889 {
 890         NTSTATUS status;
 891         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
 892
 893         DEBUG(10, ("Sending break request to PID %s\n",
 894                    procid_str_static(&exclusive->pid)));
 895         exclusive->op_mid = mid;
 896
 897         /* Create the message. */
 898         share_mode_entry_to_message(msg, exclusive);
 899
 900         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
 901            don't want this set in the share mode struct pointed to by lck. */
 902
 903         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
 904                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
 905                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
 906         }
 907
 908         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
 909                                     MSG_SMB_BREAK_REQUEST,
 910                                     (uint8 *)msg,
 911                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
 912         if (!NT_STATUS_IS_OK(status)) {
 913                 DEBUG(3, ("Could not send oplock break message: %s\n",
 914                           nt_errstr(status)));
 915         }
 916
 917         return status;
 918 }
 919
 920 /*
 921  * Return share_mode_entry pointers for :
 922  * 1). Batch oplock entry.
 923  * 2). Batch or exclusive oplock entry (may be identical to #1).
 924  * bool have_level2_oplock
 925  * bool have_no_oplock.
 926  * Do internal consistency checks on the share mode for a file.
 927  */
 928
 929 static void find_oplock_types(struct share_mode_lock *lck,
 930                                 struct share_mode_entry **pp_batch,
 931                                 struct share_mode_entry **pp_ex_or_batch,
 932                                 bool *got_level2,
 933                                 bool *got_no_oplock)
 934 {
 935         int i;
 936
 937         *pp_batch = NULL;
 938         *pp_ex_or_batch = NULL;
 939         *got_level2 = false;
 940         *got_no_oplock = false;
 941
 942         for (i=0; i<lck->num_share_modes; i++) {
 943                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
 944                         continue;
 945                 }
 946
 947                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 948                         /* batch - can only be one. */
 949                         if (*pp_batch || *got_level2 || *got_no_oplock) {
 950                                 smb_panic("Bad batch oplock entry.");
 951                         }
 952                         *pp_batch = &lck->share_modes[i];
 953                 }
 954
 955                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 956                         /* Exclusive or batch - can only be one. */
 957                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
 958                                 smb_panic("Bad exclusive or batch oplock entry.");
 959                         }
 960                         *pp_ex_or_batch = &lck->share_modes[i];
 961                 }
 962
 963                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
 964                         if (*pp_batch || *pp_ex_or_batch) {
 965                                 smb_panic("Bad levelII oplock entry.");
 966                         }
 967                         *got_level2 = true;
 968                 }
 969
 970                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
 971                         if (*pp_batch || *pp_ex_or_batch) {
 972                                 smb_panic("Bad no oplock entry.");
 973                         }
 974                         *got_no_oplock = true;
 975                 }
 976         }
 977 }
 978
 979 static bool delay_for_batch_oplocks(files_struct *fsp,
 980                                         uint64_t mid,
 981                                         int oplock_request,
 982                                         struct share_mode_entry *batch_entry)
 983 {
 984         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
 985                 return false;
 986         }
 987
 988         if (batch_entry != NULL) {
 989                 /* Found a batch oplock */
 990                 send_break_message(fsp, batch_entry, mid, oplock_request);
 991                 return true;
 992         }
 993         return false;
 994 }
 995
 996 static bool delay_for_exclusive_oplocks(files_struct *fsp,
 997                                         uint64_t mid,
 998                                         int oplock_request,
 999                                         struct share_mode_entry *ex_entry)
1000 {
1001         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1002                 return false;
1003         }
1004
1005         if (ex_entry != NULL) {
1006                 /* Found an exclusive or batch oplock */
1007                 bool delay_it = is_delete_request(fsp) ?
1008                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1009                 if (delay_it) {
1010                         send_break_message(fsp, ex_entry, mid, oplock_request);
1011                         return true;
1012                 }
1013         }
1014         return false;
1015 }
1016
1017 static bool file_has_brlocks(files_struct *fsp)
1018 {
1019         struct byte_range_lock *br_lck;
1020
1021         br_lck = brl_get_locks_readonly(fsp);
1022         if (!br_lck)
1023                 return false;
1024
1025         return br_lck->num_locks > 0 ? true : false;
1026 }
1027
1028 static void grant_fsp_oplock_type(files_struct *fsp,
1029                                 int oplock_request,
1030                                 bool got_level2_oplock,
1031                                 bool got_a_none_oplock)
1032 {
1033         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1034                             lp_level2_oplocks(SNUM(fsp->conn));
1035
1036         /* Start by granting what the client asked for,
1037            but ensure no SAMBA_PRIVATE bits can be set. */
1038         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1039
1040         if (oplock_request & INTERNAL_OPEN_ONLY) {
1041                 /* No oplocks on internal open. */
1042                 fsp->oplock_type = NO_OPLOCK;
1043                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1044                         fsp->oplock_type, fsp_str_dbg(fsp)));
1045                 return;
1046         } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1047                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1048                         fsp_str_dbg(fsp)));
1049                 fsp->oplock_type = NO_OPLOCK;
1050         }
1051
1052         if (is_stat_open(fsp->access_mask)) {
1053                 /* Leave the value already set. */
1054                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1055                         fsp->oplock_type, fsp_str_dbg(fsp)));
1056                 return;
1057         }
1058
1059         /*
1060          * Match what was requested (fsp->oplock_type) with
1061          * what was found in the existing share modes.
1062          */
1063
1064         if (got_a_none_oplock) {
1065                 fsp->oplock_type = NO_OPLOCK;
1066         } else if (got_level2_oplock) {
1067                 if (fsp->oplock_type == NO_OPLOCK ||
1068                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1069                         /* Store a level2 oplock, but don't tell the client */
1070                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1071                 } else {
1072                         fsp->oplock_type = LEVEL_II_OPLOCK;
1073                 }
1074         } else {
1075                 /* All share_mode_entries are placeholders or deferred.
1076                  * Silently upgrade to fake levelII if the client didn't
1077                  * ask for an oplock. */
1078                 if (fsp->oplock_type == NO_OPLOCK) {
1079                         /* Store a level2 oplock, but don't tell the client */
1080                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1081                 }
1082         }
1083
1084         /*
1085          * Don't grant level2 to clients that don't want them
1086          * or if we've turned them off.
1087          */
1088         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1089                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1090         }
1091
1092         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1093                   fsp->oplock_type, fsp_str_dbg(fsp)));
1094 }
1095
1096 bool request_timed_out(struct timeval request_time,
1097                        struct timeval timeout)
1098 {
1099         struct timeval now, end_time;
1100         GetTimeOfDay(&now);
1101         end_time = timeval_sum(&request_time, &timeout);
1102         return (timeval_compare(&end_time, &now) < 0);
1103 }
1104
1105 /****************************************************************************
1106  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1107 ****************************************************************************/
1108
1109 static void defer_open(struct share_mode_lock *lck,
1110                        struct timeval request_time,
1111                        struct timeval timeout,
1112                        struct smb_request *req,
1113                        struct deferred_open_record *state)
1114 {
1115         int i;
1116
1117         /* Paranoia check */
1118
1119         for (i=0; i<lck->num_share_modes; i++) {
1120                 struct share_mode_entry *e = &lck->share_modes[i];
1121
1122                 if (!is_deferred_open_entry(e)) {
1123                         continue;
1124                 }
1125
1126                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1127                         DEBUG(0, ("Trying to defer an already deferred "
1128                                 "request: mid=%llu, exiting\n",
1129                                 (unsigned long long)req->mid));
1130                         exit_server("attempt to defer a deferred request");
1131                 }
1132         }
1133
1134         /* End paranoia check */
1135
1136         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1137                   "open entry for mid %llu\n",
1138                   (unsigned int)request_time.tv_sec,
1139                   (unsigned int)request_time.tv_usec,
1140                   (unsigned long long)req->mid));
1141
1142         if (!push_deferred_open_message_smb(req, request_time, timeout,
1143                                        state->id, (char *)state, sizeof(*state))) {
1144                 exit_server("push_deferred_open_message_smb failed");
1145         }
1146         add_deferred_open(lck, req->mid, request_time,
1147                           sconn_server_id(req->sconn), state->id);
1148 }
1149
1150
1151 /****************************************************************************
1152  On overwrite open ensure that the attributes match.
1153 ****************************************************************************/
1154
1155 bool open_match_attributes(connection_struct *conn,
1156                            uint32 old_dos_attr,
1157                            uint32 new_dos_attr,
1158                            mode_t existing_unx_mode,
1159                            mode_t new_unx_mode,
1160                            mode_t *returned_unx_mode)
1161 {
1162         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1163
1164         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1165         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1166
1167         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1168            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1169                 *returned_unx_mode = new_unx_mode;
1170         } else {
1171                 *returned_unx_mode = (mode_t)0;
1172         }
1173
1174         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1175                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1176                   "returned_unx_mode = 0%o\n",
1177                   (unsigned int)old_dos_attr,
1178                   (unsigned int)existing_unx_mode,
1179                   (unsigned int)new_dos_attr,
1180                   (unsigned int)*returned_unx_mode ));
1181
1182         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1183         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1184                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1185                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1186                         return False;
1187                 }
1188         }
1189         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1190                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1191                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1192                         return False;
1193                 }
1194         }
1195         return True;
1196 }
1197
1198 /****************************************************************************
1199  Special FCB or DOS processing in the case of a sharing violation.
1200  Try and find a duplicated file handle.
1201 ****************************************************************************/
1202
1203 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1204                                      connection_struct *conn,
1205                                      files_struct *fsp_to_dup_into,
1206                                      const struct smb_filename *smb_fname,
1207                                      struct file_id id,
1208                                      uint16 file_pid,
1209                                      uint16 vuid,
1210                                      uint32 access_mask,
1211                                      uint32 share_access,
1212                                      uint32 create_options)
1213 {
1214         files_struct *fsp;
1215
1216         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1217                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1218
1219         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1220             fsp = file_find_di_next(fsp)) {
1221
1222                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1223                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1224                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1225                           fsp->fh->fd, (unsigned int)fsp->vuid,
1226                           (unsigned int)fsp->file_pid,
1227                           (unsigned int)fsp->fh->private_options,
1228                           (unsigned int)fsp->access_mask ));
1229
1230                 if (fsp->fh->fd != -1 &&
1231                     fsp->vuid == vuid &&
1232                     fsp->file_pid == file_pid &&
1233                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1234                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1235                     (fsp->access_mask & FILE_WRITE_DATA) &&
1236                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1237                     strequal(fsp->fsp_name->stream_name,
1238                              smb_fname->stream_name)) {
1239                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1240                         break;
1241                 }
1242         }
1243
1244         if (!fsp) {
1245                 return NT_STATUS_NOT_FOUND;
1246         }
1247
1248         /* quite an insane set of semantics ... */
1249         if (is_executable(smb_fname->base_name) &&
1250             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1251                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1252                 return NT_STATUS_INVALID_PARAMETER;
1253         }
1254
1255         /* We need to duplicate this fsp. */
1256         return dup_file_fsp(req, fsp, access_mask, share_access,
1257                             create_options, fsp_to_dup_into);
1258 }
1259
1260 /****************************************************************************
1261  Open a file with a share mode - old openX method - map into NTCreate.
1262 ****************************************************************************/
1263
1264 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1265                                  int deny_mode, int open_func,
1266                                  uint32 *paccess_mask,
1267                                  uint32 *pshare_mode,
1268                                  uint32 *pcreate_disposition,
1269                                  uint32 *pcreate_options,
1270                                  uint32_t *pprivate_flags)
1271 {
1272         uint32 access_mask;
1273         uint32 share_mode;
1274         uint32 create_disposition;
1275         uint32 create_options = FILE_NON_DIRECTORY_FILE;
1276         uint32_t private_flags = 0;
1277
1278         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1279                   "open_func = 0x%x\n",
1280                   smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1281                   (unsigned int)open_func ));
1282
1283         /* Create the NT compatible access_mask. */
1284         switch (GET_OPENX_MODE(deny_mode)) {
1285                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1286                 case DOS_OPEN_RDONLY:
1287                         access_mask = FILE_GENERIC_READ;
1288                         break;
1289                 case DOS_OPEN_WRONLY:
1290                         access_mask = FILE_GENERIC_WRITE;
1291                         break;
1292                 case DOS_OPEN_RDWR:
1293                 case DOS_OPEN_FCB:
1294                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1295                         break;
1296                 default:
1297                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1298                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
1299                         return False;
1300         }
1301
1302         /* Create the NT compatible create_disposition. */
1303         switch (open_func) {
1304                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1305                         create_disposition = FILE_CREATE;
1306                         break;
1307
1308                 case OPENX_FILE_EXISTS_OPEN:
1309                         create_disposition = FILE_OPEN;
1310                         break;
1311
1312                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1313                         create_disposition = FILE_OPEN_IF;
1314                         break;
1315
1316                 case OPENX_FILE_EXISTS_TRUNCATE:
1317                         create_disposition = FILE_OVERWRITE;
1318                         break;
1319
1320                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1321                         create_disposition = FILE_OVERWRITE_IF;
1322                         break;
1323
1324                 default:
1325                         /* From samba4 - to be confirmed. */
1326                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1327                                 create_disposition = FILE_CREATE;
1328                                 break;
1329                         }
1330                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1331                                   "open_func 0x%x\n", (unsigned int)open_func));
1332                         return False;
1333         }
1334
1335         /* Create the NT compatible share modes. */
1336         switch (GET_DENY_MODE(deny_mode)) {
1337                 case DENY_ALL:
1338                         share_mode = FILE_SHARE_NONE;
1339                         break;
1340
1341                 case DENY_WRITE:
1342                         share_mode = FILE_SHARE_READ;
1343                         break;
1344
1345                 case DENY_READ:
1346                         share_mode = FILE_SHARE_WRITE;
1347                         break;
1348
1349                 case DENY_NONE:
1350                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1351                         break;
1352
1353                 case DENY_DOS:
1354                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1355                         if (is_executable(smb_fname->base_name)) {
1356                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1357                         } else {
1358                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1359                                         share_mode = FILE_SHARE_READ;
1360                                 } else {
1361                                         share_mode = FILE_SHARE_NONE;
1362                                 }
1363                         }
1364                         break;
1365
1366                 case DENY_FCB:
1367                         private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1368                         share_mode = FILE_SHARE_NONE;
1369                         break;
1370
1371                 default:
1372                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1373                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1374                         return False;
1375         }
1376
1377         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1378                   "share_mode = 0x%x, create_disposition = 0x%x, "
1379                   "create_options = 0x%x private_flags = 0x%x\n",
1380                   smb_fname_str_dbg(smb_fname),
1381                   (unsigned int)access_mask,
1382                   (unsigned int)share_mode,
1383                   (unsigned int)create_disposition,
1384                   (unsigned int)create_options,
1385                   (unsigned int)private_flags));
1386
1387         if (paccess_mask) {
1388                 *paccess_mask = access_mask;
1389         }
1390         if (pshare_mode) {
1391                 *pshare_mode = share_mode;
1392         }
1393         if (pcreate_disposition) {
1394                 *pcreate_disposition = create_disposition;
1395         }
1396         if (pcreate_options) {
1397                 *pcreate_options = create_options;
1398         }
1399         if (pprivate_flags) {
1400                 *pprivate_flags = private_flags;
1401         }
1402
1403         return True;
1404
1405 }
1406
1407 static void schedule_defer_open(struct share_mode_lock *lck,
1408                                 struct timeval request_time,
1409                                 struct smb_request *req)
1410 {
1411         struct deferred_open_record state;
1412
1413         /* This is a relative time, added to the absolute
1414            request_time value to get the absolute timeout time.
1415            Note that if this is the second or greater time we enter
1416            this codepath for this particular request mid then
1417            request_time is left as the absolute time of the *first*
1418            time this request mid was processed. This is what allows
1419            the request to eventually time out. */
1420
1421         struct timeval timeout;
1422
1423         /* Normally the smbd we asked should respond within
1424          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1425          * the client did, give twice the timeout as a safety
1426          * measure here in case the other smbd is stuck
1427          * somewhere else. */
1428
1429         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1430
1431         /* Nothing actually uses state.delayed_for_oplocks
1432            but it's handy to differentiate in debug messages
1433            between a 30 second delay due to oplock break, and
1434            a 1 second delay for share mode conflicts. */
1435
1436         state.delayed_for_oplocks = True;
1437         state.id = lck->id;
1438
1439         if (!request_timed_out(request_time, timeout)) {
1440                 defer_open(lck, request_time, timeout, req, &state);
1441         }
1442 }
1443
1444 /****************************************************************************
1445  Work out what access_mask to use from what the client sent us.
1446 ****************************************************************************/
1447
1448 static NTSTATUS calculate_access_mask(connection_struct *conn,
1449                                         const struct smb_filename *smb_fname,
1450                                         bool file_existed,
1451                                         uint32_t access_mask,
1452                                         uint32_t *access_mask_out)
1453 {
1454         NTSTATUS status;
1455
1456         /*
1457          * Convert GENERIC bits to specific bits.
1458          */
1459
1460         se_map_generic(&access_mask, &file_generic_mapping);
1461
1462         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1463         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1464                 if (file_existed) {
1465
1466                         struct security_descriptor *sd;
1467                         uint32_t access_granted = 0;
1468
1469                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1470                                         (SECINFO_OWNER |
1471                                         SECINFO_GROUP |
1472                                         SECINFO_DACL),&sd);
1473
1474                         if (!NT_STATUS_IS_OK(status)) {
1475                                 DEBUG(10, ("calculate_access_mask: Could not get acl "
1476                                         "on file %s: %s\n",
1477                                         smb_fname_str_dbg(smb_fname),
1478                                         nt_errstr(status)));
1479                                 return NT_STATUS_ACCESS_DENIED;
1480                         }
1481
1482                         status = smb1_file_se_access_check(conn,
1483                                         sd,
1484                                         get_current_nttok(conn),
1485                                         access_mask,
1486                                         &access_granted);
1487
1488                         TALLOC_FREE(sd);
1489
1490                         if (!NT_STATUS_IS_OK(status)) {
1491                                 DEBUG(10, ("calculate_access_mask: Access denied on "
1492                                         "file %s: when calculating maximum access\n",
1493                                         smb_fname_str_dbg(smb_fname)));
1494                                 return NT_STATUS_ACCESS_DENIED;
1495                         }
1496
1497                         access_mask = access_granted;
1498                 } else {
1499                         access_mask = FILE_GENERIC_ALL;
1500                 }
1501         }
1502
1503         *access_mask_out = access_mask;
1504         return NT_STATUS_OK;
1505 }
1506
1507 /****************************************************************************
1508  Remove the deferred open entry under lock.
1509 ****************************************************************************/
1510
1511 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1512                                 struct server_id pid)
1513 {
1514         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1515                         NULL, NULL, NULL);
1516         if (lck == NULL) {
1517                 DEBUG(0, ("could not get share mode lock\n"));
1518         } else {
1519                 del_deferred_open_entry(lck, mid, pid);
1520                 TALLOC_FREE(lck);
1521         }
1522 }
1523
1524 /****************************************************************************
1525  Open a file with a share mode. Passed in an already created files_struct *.
1526 ****************************************************************************/
1527
1528 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1529                             struct smb_request *req,
1530                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1531                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1532                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1533                             uint32 create_options,      /* options such as delete on close. */
1534                             uint32 new_dos_attributes,  /* attributes used for new file. */
1535                             int oplock_request,         /* internal Samba oplock codes. */
1536                                                         /* Information (FILE_EXISTS etc.) */
1537                             uint32_t private_flags,     /* Samba specific flags. */
1538                             int *pinfo,
1539                             files_struct *fsp)
1540 {
1541         struct smb_filename *smb_fname = fsp->fsp_name;
1542         int flags=0;
1543         int flags2=0;
1544         bool file_existed = VALID_STAT(smb_fname->st);
1545         bool def_acl = False;
1546         bool posix_open = False;
1547         bool new_file_created = False;
1548         bool clear_ads = false;
1549         struct file_id id;
1550         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1551         mode_t new_unx_mode = (mode_t)0;
1552         mode_t unx_mode = (mode_t)0;
1553         int info;
1554         uint32 existing_dos_attributes = 0;
1555         struct timeval request_time = timeval_zero();
1556         struct share_mode_lock *lck = NULL;
1557         uint32 open_access_mask = access_mask;
1558         NTSTATUS status;
1559         char *parent_dir;
1560
1561         ZERO_STRUCT(id);
1562
1563         /* Windows allows a new file to be created and
1564            silently removes a FILE_ATTRIBUTE_DIRECTORY
1565            sent by the client. Do the same. */
1566
1567         new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1568
1569         if (conn->printer) {
1570                 /*
1571                  * Printers are handled completely differently.
1572                  * Most of the passed parameters are ignored.
1573                  */
1574
1575                 if (pinfo) {
1576                         *pinfo = FILE_WAS_CREATED;
1577                 }
1578
1579                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1580                            smb_fname_str_dbg(smb_fname)));
1581
1582                 if (!req) {
1583                         DEBUG(0,("open_file_ntcreate: printer open without "
1584                                 "an SMB request!\n"));
1585                         return NT_STATUS_INTERNAL_ERROR;
1586                 }
1587
1588                 return print_spool_open(fsp, smb_fname->base_name,
1589                                         req->vuid);
1590         }
1591
1592         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1593                             NULL)) {
1594                 return NT_STATUS_NO_MEMORY;
1595         }
1596
1597         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1598                 posix_open = True;
1599                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1600                 new_dos_attributes = 0;
1601         } else {
1602                 /* We add aARCH to this as this mode is only used if the file is
1603                  * created new. */
1604                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1605                                      smb_fname, parent_dir);
1606         }
1607
1608         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1609                    "access_mask=0x%x share_access=0x%x "
1610                    "create_disposition = 0x%x create_options=0x%x "
1611                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1612                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1613                    access_mask, share_access, create_disposition,
1614                    create_options, (unsigned int)unx_mode, oplock_request,
1615                    (unsigned int)private_flags));
1616
1617         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1618                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1619                 return NT_STATUS_INTERNAL_ERROR;
1620         }
1621
1622         /*
1623          * Only non-internal opens can be deferred at all
1624          */
1625
1626         if (req) {
1627                 void *ptr;
1628                 if (get_deferred_open_message_state(req,
1629                                 &request_time,
1630                                 &ptr)) {
1631
1632                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1633                         /* Remember the absolute time of the original
1634                            request with this mid. We'll use it later to
1635                            see if this has timed out. */
1636
1637                         /* Remove the deferred open entry under lock. */
1638                         remove_deferred_open_entry(
1639                                 state->id, req->mid,
1640                                 sconn_server_id(req->sconn));
1641
1642                         /* Ensure we don't reprocess this message. */
1643                         remove_deferred_open_message_smb(req->mid);
1644                 }
1645         }
1646
1647         status = check_name(conn, smb_fname->base_name);
1648         if (!NT_STATUS_IS_OK(status)) {
1649                 return status;
1650         }
1651
1652         if (!posix_open) {
1653                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1654                 if (file_existed) {
1655                         existing_dos_attributes = dos_mode(conn, smb_fname);
1656                 }
1657         }
1658
1659         /* ignore any oplock requests if oplocks are disabled */
1660         if (!lp_oplocks(SNUM(conn)) ||
1661             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1662                 /* Mask off everything except the private Samba bits. */
1663                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1664         }
1665
1666         /* this is for OS/2 long file names - say we don't support them */
1667         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1668                 /* OS/2 Workplace shell fix may be main code stream in a later
1669                  * release. */
1670                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1671                          "supported.\n"));
1672                 if (use_nt_status()) {
1673                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1674                 }
1675                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1676         }
1677
1678         switch( create_disposition ) {
1679                 /*
1680                  * Currently we're using FILE_SUPERSEDE as the same as
1681                  * FILE_OVERWRITE_IF but they really are
1682                  * different. FILE_SUPERSEDE deletes an existing file
1683                  * (requiring delete access) then recreates it.
1684                  */
1685                 case FILE_SUPERSEDE:
1686                         /* If file exists replace/overwrite. If file doesn't
1687                          * exist create. */
1688                         flags2 |= (O_CREAT | O_TRUNC);
1689                         clear_ads = true;
1690                         break;
1691
1692                 case FILE_OVERWRITE_IF:
1693                         /* If file exists replace/overwrite. If file doesn't
1694                          * exist create. */
1695                         flags2 |= (O_CREAT | O_TRUNC);
1696                         clear_ads = true;
1697                         break;
1698
1699                 case FILE_OPEN:
1700                         /* If file exists open. If file doesn't exist error. */
1701                         if (!file_existed) {
1702                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1703                                          "requested for file %s and file "
1704                                          "doesn't exist.\n",
1705                                          smb_fname_str_dbg(smb_fname)));
1706                                 errno = ENOENT;
1707                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1708                         }
1709                         break;
1710
1711                 case FILE_OVERWRITE:
1712                         /* If file exists overwrite. If file doesn't exist
1713                          * error. */
1714                         if (!file_existed) {
1715                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1716                                          "requested for file %s and file "
1717                                          "doesn't exist.\n",
1718                                          smb_fname_str_dbg(smb_fname) ));
1719                                 errno = ENOENT;
1720                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1721                         }
1722                         flags2 |= O_TRUNC;
1723                         clear_ads = true;
1724                         break;
1725
1726                 case FILE_CREATE:
1727                         /* If file exists error. If file doesn't exist
1728                          * create. */
1729                         if (file_existed) {
1730                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1731                                          "requested for file %s and file "
1732                                          "already exists.\n",
1733                                          smb_fname_str_dbg(smb_fname)));
1734                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1735                                         errno = EISDIR;
1736                                 } else {
1737                                         errno = EEXIST;
1738                                 }
1739                                 return map_nt_error_from_unix(errno);
1740                         }
1741                         flags2 |= (O_CREAT|O_EXCL);
1742                         break;
1743
1744                 case FILE_OPEN_IF:
1745                         /* If file exists open. If file doesn't exist
1746                          * create. */
1747                         flags2 |= O_CREAT;
1748                         break;
1749
1750                 default:
1751                         return NT_STATUS_INVALID_PARAMETER;
1752         }
1753
1754         /* We only care about matching attributes on file exists and
1755          * overwrite. */
1756
1757         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1758                              (create_disposition == FILE_OVERWRITE_IF))) {
1759                 if (!open_match_attributes(conn, existing_dos_attributes,
1760                                            new_dos_attributes,
1761                                            smb_fname->st.st_ex_mode,
1762                                            unx_mode, &new_unx_mode)) {
1763                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1764                                  "for file %s (%x %x) (0%o, 0%o)\n",
1765                                  smb_fname_str_dbg(smb_fname),
1766                                  existing_dos_attributes,
1767                                  new_dos_attributes,
1768                                  (unsigned int)smb_fname->st.st_ex_mode,
1769                                  (unsigned int)unx_mode ));
1770                         errno = EACCES;
1771                         return NT_STATUS_ACCESS_DENIED;
1772                 }
1773         }
1774
1775         status = calculate_access_mask(conn, smb_fname, file_existed,
1776                                         access_mask,
1777                                         &access_mask);
1778         if (!NT_STATUS_IS_OK(status)) {
1779                 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1780                         "on file %s returned %s\n",
1781                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1782                 return status;
1783         }
1784
1785         open_access_mask = access_mask;
1786
1787         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1788                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1789         }
1790
1791         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1792                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1793                     access_mask));
1794
1795         /*
1796          * Note that we ignore the append flag as append does not
1797          * mean the same thing under DOS and Unix.
1798          */
1799
1800         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1801                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1802                 /* DENY_DOS opens are always underlying read-write on the
1803                    file handle, no matter what the requested access mask
1804                     says. */
1805                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1806                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1807                         flags = O_RDWR;
1808                 } else {
1809                         flags = O_WRONLY;
1810                 }
1811         } else {
1812                 flags = O_RDONLY;
1813         }
1814
1815         /*
1816          * Currently we only look at FILE_WRITE_THROUGH for create options.
1817          */
1818
1819 #if defined(O_SYNC)
1820         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1821                 flags2 |= O_SYNC;
1822         }
1823 #endif /* O_SYNC */
1824
1825         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1826                 flags2 |= O_APPEND;
1827         }
1828
1829         if (!posix_open && !CAN_WRITE(conn)) {
1830                 /*
1831                  * We should really return a permission denied error if either
1832                  * O_CREAT or O_TRUNC are set, but for compatibility with
1833                  * older versions of Samba we just AND them out.
1834                  */
1835                 flags2 &= ~(O_CREAT|O_TRUNC);
1836         }
1837
1838         /*
1839          * Ensure we can't write on a read-only share or file.
1840          */
1841
1842         if (flags != O_RDONLY && file_existed &&
1843             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1844                 DEBUG(5,("open_file_ntcreate: write access requested for "
1845                          "file %s on read only %s\n",
1846                          smb_fname_str_dbg(smb_fname),
1847                          !CAN_WRITE(conn) ? "share" : "file" ));
1848                 errno = EACCES;
1849                 return NT_STATUS_ACCESS_DENIED;
1850         }
1851
1852         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1853         fsp->share_access = share_access;
1854         fsp->fh->private_options = private_flags;
1855         fsp->access_mask = open_access_mask; /* We change this to the
1856                                               * requested access_mask after
1857                                               * the open is done. */
1858         fsp->posix_open = posix_open;
1859
1860         /* Ensure no SAMBA_PRIVATE bits can be set. */
1861         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1862
1863         if (timeval_is_zero(&request_time)) {
1864                 request_time = fsp->open_time;
1865         }
1866
1867         if (file_existed) {
1868                 struct share_mode_entry *batch_entry = NULL;
1869                 struct share_mode_entry *exclusive_entry = NULL;
1870                 bool got_level2_oplock = false;
1871                 bool got_a_none_oplock = false;
1872
1873                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1874                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1875
1876                 lck = get_share_mode_lock(talloc_tos(), id,
1877                                           conn->connectpath,
1878                                           smb_fname, &old_write_time);
1879
1880                 if (lck == NULL) {
1881                         DEBUG(0, ("Could not get share mode lock\n"));
1882                         return NT_STATUS_SHARING_VIOLATION;
1883                 }
1884
1885                 /* Get the types we need to examine. */
1886                 find_oplock_types(lck,
1887                                 &batch_entry,
1888                                 &exclusive_entry,
1889                                 &got_level2_oplock,
1890                                 &got_a_none_oplock);
1891
1892                 /* First pass - send break only on batch oplocks. */
1893                 if ((req != NULL) &&
1894                                 delay_for_batch_oplocks(fsp,
1895                                         req->mid,
1896                                         oplock_request,
1897                                         batch_entry)) {
1898                         schedule_defer_open(lck, request_time, req);
1899                         TALLOC_FREE(lck);
1900                         return NT_STATUS_SHARING_VIOLATION;
1901                 }
1902
1903                 /* Use the client requested access mask here, not the one we
1904                  * open with. */
1905                 status = open_mode_check(conn, lck, fsp->name_hash,
1906                                         access_mask, share_access,
1907                                          create_options, &file_existed);
1908
1909                 if (NT_STATUS_IS_OK(status)) {
1910                         /* We might be going to allow this open. Check oplock
1911                          * status again. */
1912                         /* Second pass - send break for both batch or
1913                          * exclusive oplocks. */
1914                         if ((req != NULL) &&
1915                                         delay_for_exclusive_oplocks(
1916                                                 fsp,
1917                                                 req->mid,
1918                                                 oplock_request,
1919                                                 exclusive_entry)) {
1920                                 schedule_defer_open(lck, request_time, req);
1921                                 TALLOC_FREE(lck);
1922                                 return NT_STATUS_SHARING_VIOLATION;
1923                         }
1924                 }
1925
1926                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1927                         /* DELETE_PENDING is not deferred for a second */
1928                         TALLOC_FREE(lck);
1929                         return status;
1930                 }
1931
1932                 grant_fsp_oplock_type(fsp,
1933                                 oplock_request,
1934                                 got_level2_oplock,
1935                                 got_a_none_oplock);
1936
1937                 if (!NT_STATUS_IS_OK(status)) {
1938                         uint32 can_access_mask;
1939                         bool can_access = True;
1940
1941                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1942
1943                         /* Check if this can be done with the deny_dos and fcb
1944                          * calls. */
1945                         if (private_flags &
1946                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1947                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1948                                 if (req == NULL) {
1949                                         DEBUG(0, ("DOS open without an SMB "
1950                                                   "request!\n"));
1951                                         TALLOC_FREE(lck);
1952                                         return NT_STATUS_INTERNAL_ERROR;
1953                                 }
1954
1955                                 /* Use the client requested access mask here,
1956                                  * not the one we open with. */
1957                                 status = fcb_or_dos_open(req,
1958                                                         conn,
1959                                                         fsp,
1960                                                         smb_fname,
1961                                                         id,
1962                                                         req->smbpid,
1963                                                         req->vuid,
1964                                                         access_mask,
1965                                                         share_access,
1966                                                         create_options);
1967
1968                                 if (NT_STATUS_IS_OK(status)) {
1969                                         TALLOC_FREE(lck);
1970                                         if (pinfo) {
1971                                                 *pinfo = FILE_WAS_OPENED;
1972                                         }
1973                                         return NT_STATUS_OK;
1974                                 }
1975                         }
1976
1977                         /*
1978                          * This next line is a subtlety we need for
1979                          * MS-Access. If a file open will fail due to share
1980                          * permissions and also for security (access) reasons,
1981                          * we need to return the access failed error, not the
1982                          * share error. We can't open the file due to kernel
1983                          * oplock deadlock (it's possible we failed above on
1984                          * the open_mode_check()) so use a userspace check.
1985                          */
1986
1987                         if (flags & O_RDWR) {
1988                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1989                         } else if (flags & O_WRONLY) {
1990                                 can_access_mask = FILE_WRITE_DATA;
1991                         } else {
1992                                 can_access_mask = FILE_READ_DATA;
1993                         }
1994
1995                         if (((can_access_mask & FILE_WRITE_DATA) &&
1996                                 !CAN_WRITE(conn)) ||
1997                             !can_access_file_data(conn, smb_fname,
1998                                                   can_access_mask)) {
1999                                 can_access = False;
2000                         }
2001
2002                         /*
2003                          * If we're returning a share violation, ensure we
2004                          * cope with the braindead 1 second delay.
2005                          */
2006
2007                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2008                             lp_defer_sharing_violations()) {
2009                                 struct timeval timeout;
2010                                 struct deferred_open_record state;
2011                                 int timeout_usecs;
2012
2013                                 /* this is a hack to speed up torture tests
2014                                    in 'make test' */
2015                                 timeout_usecs = lp_parm_int(SNUM(conn),
2016                                                             "smbd","sharedelay",
2017                                                             SHARING_VIOLATION_USEC_WAIT);
2018
2019                                 /* This is a relative time, added to the absolute
2020                                    request_time value to get the absolute timeout time.
2021                                    Note that if this is the second or greater time we enter
2022                                    this codepath for this particular request mid then
2023                                    request_time is left as the absolute time of the *first*
2024                                    time this request mid was processed. This is what allows
2025                                    the request to eventually time out. */
2026
2027                                 timeout = timeval_set(0, timeout_usecs);
2028
2029                                 /* Nothing actually uses state.delayed_for_oplocks
2030                                    but it's handy to differentiate in debug messages
2031                                    between a 30 second delay due to oplock break, and
2032                                    a 1 second delay for share mode conflicts. */
2033
2034                                 state.delayed_for_oplocks = False;
2035                                 state.id = id;
2036
2037                                 if ((req != NULL)
2038                                     && !request_timed_out(request_time,
2039                                                           timeout)) {
2040                                         defer_open(lck, request_time, timeout,
2041                                                    req, &state);
2042                                 }
2043                         }
2044
2045                         TALLOC_FREE(lck);
2046                         if (can_access) {
2047                                 /*
2048                                  * We have detected a sharing violation here
2049                                  * so return the correct error code
2050                                  */
2051                                 status = NT_STATUS_SHARING_VIOLATION;
2052                         } else {
2053                                 status = NT_STATUS_ACCESS_DENIED;
2054                         }
2055                         return status;
2056                 }
2057
2058                 /*
2059                  * We exit this block with the share entry *locked*.....
2060                  */
2061         }
2062
2063         SMB_ASSERT(!file_existed || (lck != NULL));
2064
2065         /*
2066          * Ensure we pay attention to default ACLs on directories if required.
2067          */
2068
2069         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2070             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2071                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2072         }
2073
2074         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2075                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2076                  (unsigned int)flags, (unsigned int)flags2,
2077                  (unsigned int)unx_mode, (unsigned int)access_mask,
2078                  (unsigned int)open_access_mask));
2079
2080         /*
2081          * open_file strips any O_TRUNC flags itself.
2082          */
2083
2084         fsp_open = open_file(fsp, conn, req, parent_dir,
2085                              flags|flags2, unx_mode, access_mask,
2086                              open_access_mask);
2087
2088         if (!NT_STATUS_IS_OK(fsp_open)) {
2089                 if (lck != NULL) {
2090                         TALLOC_FREE(lck);
2091                 }
2092                 return fsp_open;
2093         }
2094
2095         if (!file_existed) {
2096                 struct share_mode_entry *batch_entry = NULL;
2097                 struct share_mode_entry *exclusive_entry = NULL;
2098                 bool got_level2_oplock = false;
2099                 bool got_a_none_oplock = false;
2100                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2101                 /*
2102                  * Deal with the race condition where two smbd's detect the
2103                  * file doesn't exist and do the create at the same time. One
2104                  * of them will win and set a share mode, the other (ie. this
2105                  * one) should check if the requested share mode for this
2106                  * create is allowed.
2107                  */
2108
2109                 /*
2110                  * Now the file exists and fsp is successfully opened,
2111                  * fsp->dev and fsp->inode are valid and should replace the
2112                  * dev=0,inode=0 from a non existent file. Spotted by
2113                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2114                  */
2115
2116                 id = fsp->file_id;
2117
2118                 lck = get_share_mode_lock(talloc_tos(), id,
2119                                           conn->connectpath,
2120                                           smb_fname, &old_write_time);
2121
2122                 if (lck == NULL) {
2123                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2124                                   "mode lock for %s\n",
2125                                   smb_fname_str_dbg(smb_fname)));
2126                         fd_close(fsp);
2127                         return NT_STATUS_SHARING_VIOLATION;
2128                 }
2129
2130                 /* Get the types we need to examine. */
2131                 find_oplock_types(lck,
2132                                 &batch_entry,
2133                                 &exclusive_entry,
2134                                 &got_level2_oplock,
2135                                 &got_a_none_oplock);
2136
2137                 /* First pass - send break only on batch oplocks. */
2138                 if ((req != NULL) &&
2139                                 delay_for_batch_oplocks(fsp,
2140                                         req->mid,
2141                                         oplock_request,
2142                                         batch_entry)) {
2143                         schedule_defer_open(lck, request_time, req);
2144                         TALLOC_FREE(lck);
2145                         fd_close(fsp);
2146                         return NT_STATUS_SHARING_VIOLATION;
2147                 }
2148
2149                 status = open_mode_check(conn, lck, fsp->name_hash,
2150                                         access_mask, share_access,
2151                                          create_options, &file_existed);
2152
2153                 if (NT_STATUS_IS_OK(status)) {
2154                         /* We might be going to allow this open. Check oplock
2155                          * status again. */
2156                         /* Second pass - send break for both batch or
2157                          * exclusive oplocks. */
2158                         if ((req != NULL) &&
2159                                         delay_for_exclusive_oplocks(
2160                                                 fsp,
2161                                                 req->mid,
2162                                                 oplock_request,
2163                                                 exclusive_entry)) {
2164                                 schedule_defer_open(lck, request_time, req);
2165                                 TALLOC_FREE(lck);
2166                                 fd_close(fsp);
2167                                 return NT_STATUS_SHARING_VIOLATION;
2168                         }
2169                 }
2170
2171                 if (!NT_STATUS_IS_OK(status)) {
2172                         struct deferred_open_record state;
2173
2174                         fd_close(fsp);
2175
2176                         state.delayed_for_oplocks = False;
2177                         state.id = id;
2178
2179                         /* Do it all over again immediately. In the second
2180                          * round we will find that the file existed and handle
2181                          * the DELETE_PENDING and FCB cases correctly. No need
2182                          * to duplicate the code here. Essentially this is a
2183                          * "goto top of this function", but don't tell
2184                          * anybody... */
2185
2186                         if (req != NULL) {
2187                                 defer_open(lck, request_time, timeval_zero(),
2188                                            req, &state);
2189                         }
2190                         TALLOC_FREE(lck);
2191                         return status;
2192                 }
2193
2194                 grant_fsp_oplock_type(fsp,
2195                                 oplock_request,
2196                                 got_level2_oplock,
2197                                 got_a_none_oplock);
2198
2199                 /*
2200                  * We exit this block with the share entry *locked*.....
2201                  */
2202
2203         }
2204
2205         SMB_ASSERT(lck != NULL);
2206
2207         /* Delete streams if create_disposition requires it */
2208         if (file_existed && clear_ads &&
2209             !is_ntfs_stream_smb_fname(smb_fname)) {
2210                 status = delete_all_streams(conn, smb_fname->base_name);
2211                 if (!NT_STATUS_IS_OK(status)) {
2212                         TALLOC_FREE(lck);
2213                         fd_close(fsp);
2214                         return status;
2215                 }
2216         }
2217
2218         /* note that we ignore failure for the following. It is
2219            basically a hack for NFS, and NFS will never set one of
2220            these only read them. Nobody but Samba can ever set a deny
2221            mode and we have already checked our more authoritative
2222            locking database for permission to set this deny mode. If
2223            the kernel refuses the operations then the kernel is wrong.
2224            note that GPFS supports it as well - jmcd */
2225
2226         if (fsp->fh->fd != -1) {
2227                 int ret_flock;
2228                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2229                 if(ret_flock == -1 ){
2230
2231                         TALLOC_FREE(lck);
2232                         fd_close(fsp);
2233
2234                         return NT_STATUS_SHARING_VIOLATION;
2235                 }
2236         }
2237
2238         /*
2239          * At this point onwards, we can guarentee that the share entry
2240          * is locked, whether we created the file or not, and that the
2241          * deny mode is compatible with all current opens.
2242          */
2243
2244         /*
2245          * If requested, truncate the file.
2246          */
2247
2248         if (file_existed && (flags2&O_TRUNC)) {
2249                 /*
2250                  * We are modifing the file after open - update the stat
2251                  * struct..
2252                  */
2253                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2254                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2255                         status = map_nt_error_from_unix(errno);
2256                         TALLOC_FREE(lck);
2257                         fd_close(fsp);
2258                         return status;
2259                 }
2260         }
2261
2262         /*
2263          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2264          */
2265         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2266
2267         if (file_existed) {
2268                 /* stat opens on existing files don't get oplocks. */
2269                 if (is_stat_open(open_access_mask)) {
2270                         fsp->oplock_type = NO_OPLOCK;
2271                 }
2272
2273                 if (!(flags2 & O_TRUNC)) {
2274                         info = FILE_WAS_OPENED;
2275                 } else {
2276                         info = FILE_WAS_OVERWRITTEN;
2277                 }
2278         } else {
2279                 info = FILE_WAS_CREATED;
2280         }
2281
2282         if (pinfo) {
2283                 *pinfo = info;
2284         }
2285
2286         /*
2287          * Setup the oplock info in both the shared memory and
2288          * file structs.
2289          */
2290
2291         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2292                 /*
2293                  * Could not get the kernel oplock or there are byte-range
2294                  * locks on the file.
2295                  */
2296                 fsp->oplock_type = NO_OPLOCK;
2297         }
2298
2299         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2300                 new_file_created = True;
2301         }
2302
2303         set_share_mode(lck, fsp, get_current_uid(conn), 0,
2304                        fsp->oplock_type);
2305
2306         /* Handle strange delete on close create semantics. */
2307         if (create_options & FILE_DELETE_ON_CLOSE) {
2308
2309                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2310
2311                 if (!NT_STATUS_IS_OK(status)) {
2312                         /* Remember to delete the mode we just added. */
2313                         del_share_mode(lck, fsp);
2314                         TALLOC_FREE(lck);
2315                         fd_close(fsp);
2316                         return status;
2317                 }
2318                 /* Note that here we set the *inital* delete on close flag,
2319                    not the regular one. The magic gets handled in close. */
2320                 fsp->initial_delete_on_close = True;
2321         }
2322
2323         if (new_file_created) {
2324                 /* Files should be initially set as archive */
2325                 if (lp_map_archive(SNUM(conn)) ||
2326                     lp_store_dos_attributes(SNUM(conn))) {
2327                         if (!posix_open) {
2328                                 if (file_set_dosmode(conn, smb_fname,
2329                                             new_dos_attributes | aARCH,
2330                                             parent_dir, true) == 0) {
2331                                         unx_mode = smb_fname->st.st_ex_mode;
2332                                 }
2333                         }
2334                 }
2335         }
2336
2337         /* Determine sparse flag. */
2338         if (posix_open) {
2339                 /* POSIX opens are sparse by default. */
2340                 fsp->is_sparse = true;
2341         } else {
2342                 fsp->is_sparse = (file_existed &&
2343                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2344         }
2345
2346         /*
2347          * Take care of inherited ACLs on created files - if default ACL not
2348          * selected.
2349          */
2350
2351         if (!posix_open && !file_existed && !def_acl) {
2352
2353                 int saved_errno = errno; /* We might get ENOSYS in the next
2354                                           * call.. */
2355
2356                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2357                     errno == ENOSYS) {
2358                         errno = saved_errno; /* Ignore ENOSYS */
2359                 }
2360
2361         } else if (new_unx_mode) {
2362
2363                 int ret = -1;
2364
2365                 /* Attributes need changing. File already existed. */
2366
2367                 {
2368                         int saved_errno = errno; /* We might get ENOSYS in the
2369                                                   * next call.. */
2370                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2371
2372                         if (ret == -1 && errno == ENOSYS) {
2373                                 errno = saved_errno; /* Ignore ENOSYS */
2374                         } else {
2375                                 DEBUG(5, ("open_file_ntcreate: reset "
2376                                           "attributes of file %s to 0%o\n",
2377                                           smb_fname_str_dbg(smb_fname),
2378                                           (unsigned int)new_unx_mode));
2379                                 ret = 0; /* Don't do the fchmod below. */
2380                         }
2381                 }
2382
2383                 if ((ret == -1) &&
2384                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2385                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2386                                   "attributes of file %s to 0%o\n",
2387                                   smb_fname_str_dbg(smb_fname),
2388                                   (unsigned int)new_unx_mode));
2389         }
2390
2391         /* If this is a successful open, we must remove any deferred open
2392          * records. */
2393         if (req != NULL) {
2394                 del_deferred_open_entry(lck, req->mid,
2395                                         sconn_server_id(req->sconn));
2396         }
2397         TALLOC_FREE(lck);
2398
2399         return NT_STATUS_OK;
2400 }
2401
2402
2403 /****************************************************************************
2404  Open a file for for write to ensure that we can fchmod it.
2405 ****************************************************************************/
2406
2407 NTSTATUS open_file_fchmod(connection_struct *conn,
2408                           struct smb_filename *smb_fname,
2409                           files_struct **result)
2410 {
2411         if (!VALID_STAT(smb_fname->st)) {
2412                 return NT_STATUS_INVALID_PARAMETER;
2413         }
2414
2415         return SMB_VFS_CREATE_FILE(
2416                 conn,                                   /* conn */
2417                 NULL,                                   /* req */
2418                 0,                                      /* root_dir_fid */
2419                 smb_fname,                              /* fname */
2420                 FILE_WRITE_DATA,                        /* access_mask */
2421                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2422                     FILE_SHARE_DELETE),
2423                 FILE_OPEN,                              /* create_disposition*/
2424                 0,                                      /* create_options */
2425                 0,                                      /* file_attributes */
2426                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2427                 0,                                      /* allocation_size */
2428                 0,                                      /* private_flags */
2429                 NULL,                                   /* sd */
2430                 NULL,                                   /* ea_list */
2431                 result,                                 /* result */
2432                 NULL);                                  /* pinfo */
2433 }
2434
2435 static NTSTATUS mkdir_internal(connection_struct *conn,
2436                                struct smb_filename *smb_dname,
2437                                uint32 file_attributes)
2438 {
2439         mode_t mode;
2440         char *parent_dir;
2441         NTSTATUS status;
2442         bool posix_open = false;
2443
2444         if(!CAN_WRITE(conn)) {
2445                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2446                          "%s\n", lp_servicename(SNUM(conn))));
2447                 return NT_STATUS_ACCESS_DENIED;
2448         }
2449
2450         status = check_name(conn, smb_dname->base_name);
2451         if (!NT_STATUS_IS_OK(status)) {
2452                 return status;
2453         }
2454
2455         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2456                             NULL)) {
2457                 return NT_STATUS_NO_MEMORY;
2458         }
2459
2460         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2461                 posix_open = true;
2462                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2463         } else {
2464                 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2465         }
2466
2467         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2468                 return map_nt_error_from_unix(errno);
2469         }
2470
2471         /* Ensure we're checking for a symlink here.... */
2472         /* We don't want to get caught by a symlink racer. */
2473
2474         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2475                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2476                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2477                 return map_nt_error_from_unix(errno);
2478         }
2479
2480         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2481                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2482                           smb_fname_str_dbg(smb_dname)));
2483                 return NT_STATUS_ACCESS_DENIED;
2484         }
2485
2486         if (lp_store_dos_attributes(SNUM(conn))) {
2487                 if (!posix_open) {
2488                         file_set_dosmode(conn, smb_dname,
2489                                          file_attributes | aDIR,
2490                                          parent_dir, true);
2491                 }
2492         }
2493
2494         if (lp_inherit_perms(SNUM(conn))) {
2495                 inherit_access_posix_acl(conn, parent_dir,
2496                                          smb_dname->base_name, mode);
2497         }
2498
2499         if (!posix_open) {
2500                 /*
2501                  * Check if high bits should have been set,
2502                  * then (if bits are missing): add them.
2503                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2504                  * dir.
2505                  */
2506                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2507                     (mode & ~smb_dname->st.st_ex_mode)) {
2508                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2509                                       (smb_dname->st.st_ex_mode |
2510                                           (mode & ~smb_dname->st.st_ex_mode)));
2511                 }
2512         }
2513
2514         /* Change the owner if required. */
2515         if (lp_inherit_owner(SNUM(conn))) {
2516                 change_dir_owner_to_parent(conn, parent_dir,
2517                                            smb_dname->base_name,
2518                                            &smb_dname->st);
2519         }
2520
2521         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2522                      smb_dname->base_name);
2523
2524         return NT_STATUS_OK;
2525 }
2526
2527 /****************************************************************************
2528  Open a directory from an NT SMB call.
2529 ****************************************************************************/
2530
2531 static NTSTATUS open_directory(connection_struct *conn,
2532                                struct smb_request *req,
2533                                struct smb_filename *smb_dname,
2534                                uint32 access_mask,
2535                                uint32 share_access,
2536                                uint32 create_disposition,
2537                                uint32 create_options,
2538                                uint32 file_attributes,
2539                                int *pinfo,
2540                                files_struct **result)
2541 {
2542         files_struct *fsp = NULL;
2543         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2544         struct share_mode_lock *lck = NULL;
2545         NTSTATUS status;
2546         struct timespec mtimespec;
2547         int info = 0;
2548
2549         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2550
2551         /* Ensure we have a directory attribute. */
2552         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2553
2554         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2555                  "share_access = 0x%x create_options = 0x%x, "
2556                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2557                  smb_fname_str_dbg(smb_dname),
2558                  (unsigned int)access_mask,
2559                  (unsigned int)share_access,
2560                  (unsigned int)create_options,
2561                  (unsigned int)create_disposition,
2562                  (unsigned int)file_attributes));
2563
2564         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2565                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2566                         is_ntfs_stream_smb_fname(smb_dname)) {
2567                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2568                           smb_fname_str_dbg(smb_dname)));
2569                 return NT_STATUS_NOT_A_DIRECTORY;
2570         }
2571
2572         status = calculate_access_mask(conn, smb_dname, dir_existed,
2573                                        access_mask, &access_mask);
2574         if (!NT_STATUS_IS_OK(status)) {
2575                 DEBUG(10, ("open_directory: calculate_access_mask "
2576                         "on file %s returned %s\n",
2577                         smb_fname_str_dbg(smb_dname),
2578                         nt_errstr(status)));
2579                 return status;
2580         }
2581
2582         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2583                         !security_token_has_privilege(get_current_nttok(conn),
2584                                         SEC_PRIV_SECURITY)) {
2585                 DEBUG(10, ("open_directory: open on %s "
2586                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2587                         smb_fname_str_dbg(smb_dname)));
2588                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2589         }
2590
2591         switch( create_disposition ) {
2592                 case FILE_OPEN:
2593
2594                         if (!dir_existed) {
2595                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2596                         }
2597
2598                         info = FILE_WAS_OPENED;
2599                         break;
2600
2601                 case FILE_CREATE:
2602
2603                         /* If directory exists error. If directory doesn't
2604                          * exist create. */
2605
2606                         status = mkdir_internal(conn, smb_dname,
2607                                                 file_attributes);
2608
2609                         if (!NT_STATUS_IS_OK(status)) {
2610                                 DEBUG(2, ("open_directory: unable to create "
2611                                           "%s. Error was %s\n",
2612                                           smb_fname_str_dbg(smb_dname),
2613                                           nt_errstr(status)));
2614                                 return status;
2615                         }
2616
2617                         info = FILE_WAS_CREATED;
2618                         break;
2619
2620                 case FILE_OPEN_IF:
2621                         /*
2622                          * If directory exists open. If directory doesn't
2623                          * exist create.
2624                          */
2625
2626                         status = mkdir_internal(conn, smb_dname,
2627                                                 file_attributes);
2628
2629                         if (NT_STATUS_IS_OK(status)) {
2630                                 info = FILE_WAS_CREATED;
2631                         }
2632
2633                         if (NT_STATUS_EQUAL(status,
2634                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2635                                 info = FILE_WAS_OPENED;
2636                                 status = NT_STATUS_OK;
2637                         }
2638
2639                         break;
2640
2641                 case FILE_SUPERSEDE:
2642                 case FILE_OVERWRITE:
2643                 case FILE_OVERWRITE_IF:
2644                 default:
2645                         DEBUG(5,("open_directory: invalid create_disposition "
2646                                  "0x%x for directory %s\n",
2647                                  (unsigned int)create_disposition,
2648                                  smb_fname_str_dbg(smb_dname)));
2649                         return NT_STATUS_INVALID_PARAMETER;
2650         }
2651
2652         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2653                 DEBUG(5,("open_directory: %s is not a directory !\n",
2654                          smb_fname_str_dbg(smb_dname)));
2655                 return NT_STATUS_NOT_A_DIRECTORY;
2656         }
2657
2658         if (info == FILE_WAS_OPENED) {
2659                 uint32_t access_granted = 0;
2660                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2661                                                 &access_granted);
2662
2663                 /* Were we trying to do a directory open
2664                  * for delete and didn't get DELETE
2665                  * access (only) ? Check if the
2666                  * directory allows DELETE_CHILD.
2667                  * See here:
2668                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2669                  * for details. */
2670
2671                 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2672                         (access_mask & DELETE_ACCESS) &&
2673                         (access_granted == DELETE_ACCESS) &&
2674                         can_delete_file_in_directory(conn, smb_dname))) {
2675                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2676                                 "on directory %s\n",
2677                                 smb_fname_str_dbg(smb_dname)));
2678                         status = NT_STATUS_OK;
2679                 }
2680
2681                 if (!NT_STATUS_IS_OK(status)) {
2682                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2683                                 "file %s failed with %s\n",
2684                                 smb_fname_str_dbg(smb_dname),
2685                                 nt_errstr(status)));
2686                         return status;
2687                 }
2688         }
2689
2690         status = file_new(req, conn, &fsp);
2691         if(!NT_STATUS_IS_OK(status)) {
2692                 return status;
2693         }
2694
2695         /*
2696          * Setup the files_struct for it.
2697          */
2698
2699         fsp->mode = smb_dname->st.st_ex_mode;
2700         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2701         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2702         fsp->file_pid = req ? req->smbpid : 0;
2703         fsp->can_lock = False;
2704         fsp->can_read = False;
2705         fsp->can_write = False;
2706
2707         fsp->share_access = share_access;
2708         fsp->fh->private_options = 0;
2709         /*
2710          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2711          */
2712         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2713         fsp->print_file = NULL;
2714         fsp->modified = False;
2715         fsp->oplock_type = NO_OPLOCK;
2716         fsp->sent_oplock_break = NO_BREAK_SENT;
2717         fsp->is_directory = True;
2718         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2719         status = fsp_set_smb_fname(fsp, smb_dname);
2720         if (!NT_STATUS_IS_OK(status)) {
2721                 file_free(req, fsp);
2722                 return status;
2723         }
2724
2725         mtimespec = smb_dname->st.st_ex_mtime;
2726
2727 #ifdef O_DIRECTORY
2728         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2729         if (!NT_STATUS_IS_OK(status)) {
2730                 DEBUG(5, ("open_directory: Could not open fd for "
2731                         "%s (%s)\n",
2732                         smb_fname_str_dbg(smb_dname),
2733                         nt_errstr(status)));
2734                 file_free(req, fsp);
2735                 return status;
2736         }
2737 #endif
2738
2739         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2740                                   conn->connectpath, smb_dname, &mtimespec);
2741
2742         if (lck == NULL) {
2743                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2744                           "%s\n", smb_fname_str_dbg(smb_dname)));
2745                 fd_close(fsp);
2746                 file_free(req, fsp);
2747                 return NT_STATUS_SHARING_VIOLATION;
2748         }
2749
2750         status = open_mode_check(conn, lck, fsp->name_hash,
2751                                 access_mask, share_access,
2752                                  create_options, &dir_existed);
2753
2754         if (!NT_STATUS_IS_OK(status)) {
2755                 TALLOC_FREE(lck);
2756                 fd_close(fsp);
2757                 file_free(req, fsp);
2758                 return status;
2759         }
2760
2761         set_share_mode(lck, fsp, get_current_uid(conn), 0, NO_OPLOCK);
2762
2763         /* For directories the delete on close bit at open time seems
2764            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2765         if (create_options & FILE_DELETE_ON_CLOSE) {
2766                 status = can_set_delete_on_close(fsp, 0);
2767                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2768                         TALLOC_FREE(lck);
2769                         fd_close(fsp);
2770                         file_free(req, fsp);
2771                         return status;
2772                 }
2773
2774                 if (NT_STATUS_IS_OK(status)) {
2775                         /* Note that here we set the *inital* delete on close flag,
2776                            not the regular one. The magic gets handled in close. */
2777                         fsp->initial_delete_on_close = True;
2778                 }
2779         }
2780
2781         TALLOC_FREE(lck);
2782
2783         if (pinfo) {
2784                 *pinfo = info;
2785         }
2786
2787         *result = fsp;
2788         return NT_STATUS_OK;
2789 }
2790
2791 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2792                           struct smb_filename *smb_dname)
2793 {
2794         NTSTATUS status;
2795         files_struct *fsp;
2796
2797         status = SMB_VFS_CREATE_FILE(
2798                 conn,                                   /* conn */
2799                 req,                                    /* req */
2800                 0,                                      /* root_dir_fid */
2801                 smb_dname,                              /* fname */
2802                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2803                 FILE_SHARE_NONE,                        /* share_access */
2804                 FILE_CREATE,                            /* create_disposition*/
2805                 FILE_DIRECTORY_FILE,                    /* create_options */
2806                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2807                 0,                                      /* oplock_request */
2808                 0,                                      /* allocation_size */
2809                 0,                                      /* private_flags */
2810                 NULL,                                   /* sd */
2811                 NULL,                                   /* ea_list */
2812                 &fsp,                                   /* result */
2813                 NULL);                                  /* pinfo */
2814
2815         if (NT_STATUS_IS_OK(status)) {
2816                 close_file(req, fsp, NORMAL_CLOSE);
2817         }
2818
2819         return status;
2820 }
2821
2822 /****************************************************************************
2823  Receive notification that one of our open files has been renamed by another
2824  smbd process.
2825 ****************************************************************************/
2826
2827 void msg_file_was_renamed(struct messaging_context *msg,
2828                           void *private_data,
2829                           uint32_t msg_type,
2830                           struct server_id server_id,
2831                           DATA_BLOB *data)
2832 {
2833         struct smbd_server_connection *sconn;
2834         files_struct *fsp;
2835         char *frm = (char *)data->data;
2836         struct file_id id;
2837         const char *sharepath;
2838         const char *base_name;
2839         const char *stream_name;
2840         struct smb_filename *smb_fname = NULL;
2841         size_t sp_len, bn_len;
2842         NTSTATUS status;
2843
2844         sconn = msg_ctx_to_sconn(msg);
2845         if (sconn == NULL) {
2846                 DEBUG(1, ("could not find sconn\n"));
2847                 return;
2848         }
2849
2850         if (data->data == NULL
2851             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2852                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2853                           (int)data->length));
2854                 return;
2855         }
2856
2857         /* Unpack the message. */
2858         pull_file_id_24(frm, &id);
2859         sharepath = &frm[24];
2860         sp_len = strlen(sharepath);
2861         base_name = sharepath + sp_len + 1;
2862         bn_len = strlen(base_name);
2863         stream_name = sharepath + sp_len + 1 + bn_len + 1;
2864
2865         /* stream_name must always be NULL if there is no stream. */
2866         if (stream_name[0] == '\0') {
2867                 stream_name = NULL;
2868         }
2869
2870         status = create_synthetic_smb_fname(talloc_tos(), base_name,
2871                                             stream_name, NULL, &smb_fname);
2872         if (!NT_STATUS_IS_OK(status)) {
2873                 return;
2874         }
2875
2876         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2877                 "file_id %s\n",
2878                 sharepath, smb_fname_str_dbg(smb_fname),
2879                 file_id_string_tos(&id)));
2880
2881         for(fsp = file_find_di_first(sconn, id); fsp;
2882             fsp = file_find_di_next(fsp)) {
2883                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2884
2885                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2886                                 fsp->fnum, fsp_str_dbg(fsp),
2887                                 smb_fname_str_dbg(smb_fname)));
2888                         status = fsp_set_smb_fname(fsp, smb_fname);
2889                         if (!NT_STATUS_IS_OK(status)) {
2890                                 goto out;
2891                         }
2892                 } else {
2893                         /* TODO. JRA. */
2894                         /* Now we have the complete path we can work out if this is
2895                            actually within this share and adjust newname accordingly. */
2896                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2897                                 "not sharepath %s) "
2898                                 "fnum %d from %s -> %s\n",
2899                                 fsp->conn->connectpath,
2900                                 sharepath,
2901                                 fsp->fnum,
2902                                 fsp_str_dbg(fsp),
2903                                 smb_fname_str_dbg(smb_fname)));
2904                 }
2905         }
2906  out:
2907         TALLOC_FREE(smb_fname);
2908         return;
2909 }
2910
2911 /*
2912  * If a main file is opened for delete, all streams need to be checked for
2913  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2914  * If that works, delete them all by setting the delete on close and close.
2915  */
2916
2917 NTSTATUS open_streams_for_delete(connection_struct *conn,
2918                                         const char *fname)
2919 {
2920         struct stream_struct *stream_info;
2921         files_struct **streams;
2922         int i;
2923         unsigned int num_streams;
2924         TALLOC_CTX *frame = talloc_stackframe();
2925         NTSTATUS status;
2926
2927         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2928                                     &num_streams, &stream_info);
2929
2930         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2931             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2932                 DEBUG(10, ("no streams around\n"));
2933                 TALLOC_FREE(frame);
2934                 return NT_STATUS_OK;
2935         }
2936
2937         if (!NT_STATUS_IS_OK(status)) {
2938                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2939                            nt_errstr(status)));
2940                 goto fail;
2941         }
2942
2943         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2944                    num_streams));
2945
2946         if (num_streams == 0) {
2947                 TALLOC_FREE(frame);
2948                 return NT_STATUS_OK;
2949         }
2950
2951         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2952         if (streams == NULL) {
2953                 DEBUG(0, ("talloc failed\n"));
2954                 status = NT_STATUS_NO_MEMORY;
2955                 goto fail;
2956         }
2957
2958         for (i=0; i<num_streams; i++) {
2959                 struct smb_filename *smb_fname = NULL;
2960
2961                 if (strequal(stream_info[i].name, "::$DATA")) {
2962                         streams[i] = NULL;
2963                         continue;
2964                 }
2965
2966                 status = create_synthetic_smb_fname(talloc_tos(), fname,
2967                                                     stream_info[i].name,
2968                                                     NULL, &smb_fname);
2969                 if (!NT_STATUS_IS_OK(status)) {
2970                         goto fail;
2971                 }
2972
2973                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2974                         DEBUG(10, ("Unable to stat stream: %s\n",
2975                                    smb_fname_str_dbg(smb_fname)));
2976                 }
2977
2978                 status = SMB_VFS_CREATE_FILE(
2979                          conn,                  /* conn */
2980                          NULL,                  /* req */
2981                          0,                     /* root_dir_fid */
2982                          smb_fname,             /* fname */
2983                          DELETE_ACCESS,         /* access_mask */
2984                          (FILE_SHARE_READ |     /* share_access */
2985                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2986                          FILE_OPEN,             /* create_disposition*/
2987                          0,                     /* create_options */
2988                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2989                          0,                     /* oplock_request */
2990                          0,                     /* allocation_size */
2991                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
2992                          NULL,                  /* sd */
2993                          NULL,                  /* ea_list */
2994                          &streams[i],           /* result */
2995                          NULL);                 /* pinfo */
2996
2997                 if (!NT_STATUS_IS_OK(status)) {
2998                         DEBUG(10, ("Could not open stream %s: %s\n",
2999                                    smb_fname_str_dbg(smb_fname),
3000                                    nt_errstr(status)));
3001
3002                         TALLOC_FREE(smb_fname);
3003                         break;
3004                 }
3005                 TALLOC_FREE(smb_fname);
3006         }
3007
3008         /*
3009          * don't touch the variable "status" beyond this point :-)
3010          */
3011
3012         for (i -= 1 ; i >= 0; i--) {
3013                 if (streams[i] == NULL) {
3014                         continue;
3015                 }
3016
3017                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3018                            fsp_str_dbg(streams[i])));
3019                 close_file(NULL, streams[i], NORMAL_CLOSE);
3020         }
3021
3022  fail:
3023         TALLOC_FREE(frame);
3024         return status;
3025 }
3026
3027 /*
3028  * Wrapper around open_file_ntcreate and open_directory
3029  */
3030
3031 static NTSTATUS create_file_unixpath(connection_struct *conn,
3032                                      struct smb_request *req,
3033                                      struct smb_filename *smb_fname,
3034                                      uint32_t access_mask,
3035                                      uint32_t share_access,
3036                                      uint32_t create_disposition,
3037                                      uint32_t create_options,
3038                                      uint32_t file_attributes,
3039                                      uint32_t oplock_request,
3040                                      uint64_t allocation_size,
3041                                      uint32_t private_flags,
3042                                      struct security_descriptor *sd,
3043                                      struct ea_list *ea_list,
3044
3045                                      files_struct **result,
3046                                      int *pinfo)
3047 {
3048         int info = FILE_WAS_OPENED;
3049         files_struct *base_fsp = NULL;
3050         files_struct *fsp = NULL;
3051         NTSTATUS status;
3052
3053         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3054                   "file_attributes = 0x%x, share_access = 0x%x, "
3055                   "create_disposition = 0x%x create_options = 0x%x "
3056                   "oplock_request = 0x%x private_flags = 0x%x "
3057                   "ea_list = 0x%p, sd = 0x%p, "
3058                   "fname = %s\n",
3059                   (unsigned int)access_mask,
3060                   (unsigned int)file_attributes,
3061                   (unsigned int)share_access,
3062                   (unsigned int)create_disposition,
3063                   (unsigned int)create_options,
3064                   (unsigned int)oplock_request,
3065                   (unsigned int)private_flags,
3066                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3067
3068         if (create_options & FILE_OPEN_BY_FILE_ID) {
3069                 status = NT_STATUS_NOT_SUPPORTED;
3070                 goto fail;
3071         }
3072
3073         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3074                 status = NT_STATUS_INVALID_PARAMETER;
3075                 goto fail;
3076         }
3077
3078         if (req == NULL) {
3079                 oplock_request |= INTERNAL_OPEN_ONLY;
3080         }
3081
3082         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3083             && (access_mask & DELETE_ACCESS)
3084             && !is_ntfs_stream_smb_fname(smb_fname)) {
3085                 /*
3086                  * We can't open a file with DELETE access if any of the
3087                  * streams is open without FILE_SHARE_DELETE
3088                  */
3089                 status = open_streams_for_delete(conn, smb_fname->base_name);
3090
3091                 if (!NT_STATUS_IS_OK(status)) {
3092                         goto fail;
3093                 }
3094         }
3095
3096         /* This is the correct thing to do (check every time) but can_delete
3097          * is expensive (it may have to read the parent directory
3098          * permissions). So for now we're not doing it unless we have a strong
3099          * hint the client is really going to delete this file. If the client
3100          * is forcing FILE_CREATE let the filesystem take care of the
3101          * permissions. */
3102
3103         /* Setting FILE_SHARE_DELETE is the hint. */
3104
3105         if (lp_acl_check_permissions(SNUM(conn))
3106             && (create_disposition != FILE_CREATE)
3107             && (share_access & FILE_SHARE_DELETE)
3108             && (access_mask & DELETE_ACCESS)
3109             && (!(can_delete_file_in_directory(conn, smb_fname) ||
3110                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3111                 status = NT_STATUS_ACCESS_DENIED;
3112                 DEBUG(10,("create_file_unixpath: open file %s "
3113                           "for delete ACCESS_DENIED\n",
3114                           smb_fname_str_dbg(smb_fname)));
3115                 goto fail;
3116         }
3117
3118         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3119                         !security_token_has_privilege(get_current_nttok(conn),
3120                                         SEC_PRIV_SECURITY)) {
3121                 DEBUG(10, ("create_file_unixpath: open on %s "
3122                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3123                         smb_fname_str_dbg(smb_fname)));
3124                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3125                 goto fail;
3126         }
3127
3128         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3129             && is_ntfs_stream_smb_fname(smb_fname)
3130             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3131                 uint32 base_create_disposition;
3132                 struct smb_filename *smb_fname_base = NULL;
3133
3134                 if (create_options & FILE_DIRECTORY_FILE) {
3135                         status = NT_STATUS_NOT_A_DIRECTORY;
3136                         goto fail;
3137                 }
3138
3139                 switch (create_disposition) {
3140                 case FILE_OPEN:
3141                         base_create_disposition = FILE_OPEN;
3142                         break;
3143                 default:
3144                         base_create_disposition = FILE_OPEN_IF;
3145                         break;
3146                 }
3147
3148                 /* Create an smb_filename with stream_name == NULL. */
3149                 status = create_synthetic_smb_fname(talloc_tos(),
3150                                                     smb_fname->base_name,
3151                                                     NULL, NULL,
3152                                                     &smb_fname_base);
3153                 if (!NT_STATUS_IS_OK(status)) {
3154                         goto fail;
3155                 }
3156
3157                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3158                         DEBUG(10, ("Unable to stat stream: %s\n",
3159                                    smb_fname_str_dbg(smb_fname_base)));
3160                 }
3161
3162                 /* Open the base file. */
3163                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3164                                               FILE_SHARE_READ
3165                                               | FILE_SHARE_WRITE
3166                                               | FILE_SHARE_DELETE,
3167                                               base_create_disposition,
3168                                               0, 0, 0, 0, 0, NULL, NULL,
3169                                               &base_fsp, NULL);
3170                 TALLOC_FREE(smb_fname_base);
3171
3172                 if (!NT_STATUS_IS_OK(status)) {
3173                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3174                                    "%s\n", smb_fname->base_name,
3175                                    nt_errstr(status)));
3176                         goto fail;
3177                 }
3178                 /* we don't need to low level fd */
3179                 fd_close(base_fsp);
3180         }
3181
3182         /*
3183          * If it's a request for a directory open, deal with it separately.
3184          */
3185
3186         if (create_options & FILE_DIRECTORY_FILE) {
3187
3188                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3189                         status = NT_STATUS_INVALID_PARAMETER;
3190                         goto fail;
3191                 }
3192
3193                 /* Can't open a temp directory. IFS kit test. */
3194                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3195                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3196                         status = NT_STATUS_INVALID_PARAMETER;
3197                         goto fail;
3198                 }
3199
3200                 /*
3201                  * We will get a create directory here if the Win32
3202                  * app specified a security descriptor in the
3203                  * CreateDirectory() call.
3204                  */
3205
3206                 oplock_request = 0;
3207                 status = open_directory(
3208                         conn, req, smb_fname, access_mask, share_access,
3209                         create_disposition, create_options, file_attributes,
3210                         &info, &fsp);
3211         } else {
3212
3213                 /*
3214                  * Ordinary file case.
3215                  */
3216
3217                 status = file_new(req, conn, &fsp);
3218                 if(!NT_STATUS_IS_OK(status)) {
3219                         goto fail;
3220                 }
3221
3222                 status = fsp_set_smb_fname(fsp, smb_fname);
3223                 if (!NT_STATUS_IS_OK(status)) {
3224                         goto fail;
3225                 }
3226
3227                 /*
3228                  * We're opening the stream element of a base_fsp
3229                  * we already opened. Set up the base_fsp pointer.
3230                  */
3231                 if (base_fsp) {
3232                         fsp->base_fsp = base_fsp;
3233                 }
3234
3235                 status = open_file_ntcreate(conn,
3236                                             req,
3237                                             access_mask,
3238                                             share_access,
3239                                             create_disposition,
3240                                             create_options,
3241                                             file_attributes,
3242                                             oplock_request,
3243                                             private_flags,
3244                                             &info,
3245                                             fsp);
3246
3247                 if(!NT_STATUS_IS_OK(status)) {
3248                         file_free(req, fsp);
3249                         fsp = NULL;
3250                 }
3251
3252                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3253
3254                         /* A stream open never opens a directory */
3255
3256                         if (base_fsp) {
3257                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3258                                 goto fail;
3259                         }
3260
3261                         /*
3262                          * Fail the open if it was explicitly a non-directory
3263                          * file.
3264                          */
3265
3266                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3267                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3268                                 goto fail;
3269                         }
3270
3271                         oplock_request = 0;
3272                         status = open_directory(
3273                                 conn, req, smb_fname, access_mask,
3274                                 share_access, create_disposition,
3275                                 create_options, file_attributes,
3276                                 &info, &fsp);
3277                 }
3278         }
3279
3280         if (!NT_STATUS_IS_OK(status)) {
3281                 goto fail;
3282         }
3283
3284         fsp->base_fsp = base_fsp;
3285
3286         /*
3287          * According to the MS documentation, the only time the security
3288          * descriptor is applied to the opened file is iff we *created* the
3289          * file; an existing file stays the same.
3290          *
3291          * Also, it seems (from observation) that you can open the file with
3292          * any access mask but you can still write the sd. We need to override
3293          * the granted access before we call set_sd
3294          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3295          */
3296
3297         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3298             && lp_nt_acl_support(SNUM(conn))) {
3299
3300                 uint32_t sec_info_sent;
3301                 uint32_t saved_access_mask = fsp->access_mask;
3302
3303                 sec_info_sent = get_sec_info(sd);
3304
3305                 fsp->access_mask = FILE_GENERIC_ALL;
3306
3307                 /* Convert all the generic bits. */
3308                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3309                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3310
3311                 if (sec_info_sent & (SECINFO_OWNER|
3312                                         SECINFO_GROUP|
3313                                         SECINFO_DACL|
3314                                         SECINFO_SACL)) {
3315                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3316                 }
3317
3318                 fsp->access_mask = saved_access_mask;
3319
3320                 if (!NT_STATUS_IS_OK(status)) {
3321                         goto fail;
3322                 }
3323         }
3324
3325         if ((ea_list != NULL) &&
3326             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3327                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3328                 if (!NT_STATUS_IS_OK(status)) {
3329                         goto fail;
3330                 }
3331         }
3332
3333         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3334                 status = NT_STATUS_ACCESS_DENIED;
3335                 goto fail;
3336         }
3337
3338         /* Save the requested allocation size. */
3339         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3340                 if (allocation_size
3341                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3342                         fsp->initial_allocation_size = smb_roundup(
3343                                 fsp->conn, allocation_size);
3344                         if (fsp->is_directory) {
3345                                 /* Can't set allocation size on a directory. */
3346                                 status = NT_STATUS_ACCESS_DENIED;
3347                                 goto fail;
3348                         }
3349                         if (vfs_allocate_file_space(
3350                                     fsp, fsp->initial_allocation_size) == -1) {
3351                                 status = NT_STATUS_DISK_FULL;
3352                                 goto fail;
3353                         }
3354                 } else {
3355                         fsp->initial_allocation_size = smb_roundup(
3356                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3357                 }
3358         }
3359
3360         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3361
3362         *result = fsp;
3363         if (pinfo != NULL) {
3364                 *pinfo = info;
3365         }
3366
3367         smb_fname->st = fsp->fsp_name->st;
3368
3369         return NT_STATUS_OK;
3370
3371  fail:
3372         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3373
3374         if (fsp != NULL) {
3375                 if (base_fsp && fsp->base_fsp == base_fsp) {
3376                         /*
3377                          * The close_file below will close
3378                          * fsp->base_fsp.
3379                          */
3380                         base_fsp = NULL;
3381                 }
3382                 close_file(req, fsp, ERROR_CLOSE);
3383                 fsp = NULL;
3384         }
3385         if (base_fsp != NULL) {
3386                 close_file(req, base_fsp, ERROR_CLOSE);
3387                 base_fsp = NULL;
3388         }
3389         return status;
3390 }
3391
3392 /*
3393  * Calculate the full path name given a relative fid.
3394  */
3395 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3396                                    struct smb_request *req,
3397                                    uint16_t root_dir_fid,
3398                                    struct smb_filename *smb_fname)
3399 {
3400         files_struct *dir_fsp;
3401         char *parent_fname = NULL;
3402         char *new_base_name = NULL;
3403         NTSTATUS status;
3404
3405         if (root_dir_fid == 0 || !smb_fname) {
3406                 status = NT_STATUS_INTERNAL_ERROR;
3407                 goto out;
3408         }
3409
3410         dir_fsp = file_fsp(req, root_dir_fid);
3411
3412         if (dir_fsp == NULL) {
3413                 status = NT_STATUS_INVALID_HANDLE;
3414                 goto out;
3415         }
3416
3417         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3418                 status = NT_STATUS_INVALID_HANDLE;
3419                 goto out;
3420         }
3421
3422         if (!dir_fsp->is_directory) {
3423
3424                 /*
3425                  * Check to see if this is a mac fork of some kind.
3426                  */
3427
3428                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3429                     is_ntfs_stream_smb_fname(smb_fname)) {
3430                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3431                         goto out;
3432                 }
3433
3434                 /*
3435                   we need to handle the case when we get a
3436                   relative open relative to a file and the
3437                   pathname is blank - this is a reopen!
3438                   (hint from demyn plantenberg)
3439                 */
3440
3441                 status = NT_STATUS_INVALID_HANDLE;
3442                 goto out;
3443         }
3444
3445         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3446                 /*
3447                  * We're at the toplevel dir, the final file name
3448                  * must not contain ./, as this is filtered out
3449                  * normally by srvstr_get_path and unix_convert
3450                  * explicitly rejects paths containing ./.
3451                  */
3452                 parent_fname = talloc_strdup(talloc_tos(), "");
3453                 if (parent_fname == NULL) {
3454                         status = NT_STATUS_NO_MEMORY;
3455                         goto out;
3456                 }
3457         } else {
3458                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3459
3460                 /*
3461                  * Copy in the base directory name.
3462                  */
3463
3464                 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3465                     dir_name_len+2);
3466                 if (parent_fname == NULL) {
3467                         status = NT_STATUS_NO_MEMORY;
3468                         goto out;
3469                 }
3470                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3471                     dir_name_len+1);
3472
3473                 /*
3474                  * Ensure it ends in a '/'.
3475                  * We used TALLOC_SIZE +2 to add space for the '/'.
3476                  */
3477
3478                 if(dir_name_len
3479                     && (parent_fname[dir_name_len-1] != '\\')
3480                     && (parent_fname[dir_name_len-1] != '/')) {
3481                         parent_fname[dir_name_len] = '/';
3482                         parent_fname[dir_name_len+1] = '\0';
3483                 }
3484         }
3485
3486         new_base_name = talloc_asprintf(smb_fname, "%s%s", parent_fname,
3487                                         smb_fname->base_name);
3488         if (new_base_name == NULL) {
3489                 status = NT_STATUS_NO_MEMORY;
3490                 goto out;
3491         }
3492
3493         TALLOC_FREE(smb_fname->base_name);
3494         smb_fname->base_name = new_base_name;
3495         status = NT_STATUS_OK;
3496
3497  out:
3498         TALLOC_FREE(parent_fname);
3499         return status;
3500 }
3501
3502 NTSTATUS create_file_default(connection_struct *conn,
3503                              struct smb_request *req,
3504                              uint16_t root_dir_fid,
3505                              struct smb_filename *smb_fname,
3506                              uint32_t access_mask,
3507                              uint32_t share_access,
3508                              uint32_t create_disposition,
3509                              uint32_t create_options,
3510                              uint32_t file_attributes,
3511                              uint32_t oplock_request,
3512                              uint64_t allocation_size,
3513                              uint32_t private_flags,
3514                              struct security_descriptor *sd,
3515                              struct ea_list *ea_list,
3516                              files_struct **result,
3517                              int *pinfo)
3518 {
3519         int info = FILE_WAS_OPENED;
3520         files_struct *fsp = NULL;
3521         NTSTATUS status;
3522         bool stream_name = false;
3523
3524         DEBUG(10,("create_file: access_mask = 0x%x "
3525                   "file_attributes = 0x%x, share_access = 0x%x, "
3526                   "create_disposition = 0x%x create_options = 0x%x "
3527                   "oplock_request = 0x%x "
3528                   "private_flags = 0x%x "
3529                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3530                   "fname = %s\n",
3531                   (unsigned int)access_mask,
3532                   (unsigned int)file_attributes,
3533                   (unsigned int)share_access,
3534                   (unsigned int)create_disposition,
3535                   (unsigned int)create_options,
3536                   (unsigned int)oplock_request,
3537                   (unsigned int)private_flags,
3538                   (unsigned int)root_dir_fid,
3539                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3540
3541         /*
3542          * Calculate the filename from the root_dir_if if necessary.
3543          */
3544
3545         if (root_dir_fid != 0) {
3546                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3547                                                    smb_fname);
3548                 if (!NT_STATUS_IS_OK(status)) {
3549                         goto fail;
3550                 }
3551         }
3552
3553         /*
3554          * Check to see if this is a mac fork of some kind.
3555          */
3556
3557         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3558         if (stream_name) {
3559                 enum FAKE_FILE_TYPE fake_file_type;
3560
3561                 fake_file_type = is_fake_file(smb_fname);
3562
3563                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3564
3565                         /*
3566                          * Here we go! support for changing the disk quotas
3567                          * --metze
3568                          *
3569                          * We need to fake up to open this MAGIC QUOTA file
3570                          * and return a valid FID.
3571                          *
3572                          * w2k close this file directly after openening xp
3573                          * also tries a QUERY_FILE_INFO on the file and then
3574                          * close it
3575                          */
3576                         status = open_fake_file(req, conn, req->vuid,
3577                                                 fake_file_type, smb_fname,
3578                                                 access_mask, &fsp);
3579                         if (!NT_STATUS_IS_OK(status)) {
3580                                 goto fail;
3581                         }
3582
3583                         ZERO_STRUCT(smb_fname->st);
3584                         goto done;
3585                 }
3586
3587                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3588                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3589                         goto fail;
3590                 }
3591         }
3592
3593         /* All file access must go through check_name() */
3594
3595         status = check_name(conn, smb_fname->base_name);
3596         if (!NT_STATUS_IS_OK(status)) {
3597                 goto fail;
3598         }
3599
3600         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3601                 int ret;
3602                 smb_fname->stream_name = NULL;
3603                 /* We have to handle this error here. */
3604                 if (create_options & FILE_DIRECTORY_FILE) {
3605                         status = NT_STATUS_NOT_A_DIRECTORY;
3606                         goto fail;
3607                 }
3608                 if (lp_posix_pathnames()) {
3609                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3610                 } else {
3611                         ret = SMB_VFS_STAT(conn, smb_fname);
3612                 }
3613
3614                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3615                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3616                         goto fail;
3617                 }
3618         }
3619
3620         status = create_file_unixpath(
3621                 conn, req, smb_fname, access_mask, share_access,
3622                 create_disposition, create_options, file_attributes,
3623                 oplock_request, allocation_size, private_flags,
3624                 sd, ea_list,
3625                 &fsp, &info);
3626
3627         if (!NT_STATUS_IS_OK(status)) {
3628                 goto fail;
3629         }
3630
3631  done:
3632         DEBUG(10, ("create_file: info=%d\n", info));
3633
3634         *result = fsp;
3635         if (pinfo != NULL) {
3636                 *pinfo = info;
3637         }
3638         return NT_STATUS_OK;
3639
3640  fail:
3641         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3642
3643         if (fsp != NULL) {
3644                 close_file(req, fsp, ERROR_CLOSE);
3645                 fsp = NULL;
3646         }
3647         return status;
3648 }