source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "auth.h"
  32 #include "messages.h"
  33
  34 extern const struct generic_mapping file_generic_mapping;
  35
  36 struct deferred_open_record {
  37         bool delayed_for_oplocks;
  38         struct file_id id;
  39 };
  40
  41 /****************************************************************************
  42  If the requester wanted DELETE_ACCESS and was rejected because
  43  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  44  ovverrides this.
  45 ****************************************************************************/
  46
  47 static bool parent_override_delete(connection_struct *conn,
  48                                         const struct smb_filename *smb_fname,
  49                                         uint32_t access_mask,
  50                                         uint32_t rejected_mask)
  51 {
  52         if ((access_mask & DELETE_ACCESS) &&
  53                     (rejected_mask & DELETE_ACCESS) &&
  54                     can_delete_file_in_directory(conn, smb_fname)) {
  55                 return true;
  56         }
  57         return false;
  58 }
  59
  60 /****************************************************************************
  61  Check if we have open rights.
  62 ****************************************************************************/
  63
  64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  65                                 const struct smb_filename *smb_fname,
  66                                 uint32_t access_mask)
  67 {
  68         /* Check if we have rights to open. */
  69         NTSTATUS status;
  70         struct security_descriptor *sd = NULL;
  71         uint32_t rejected_share_access;
  72         uint32_t rejected_mask = 0;
  73
  74         rejected_share_access = access_mask & ~(conn->share_access);
  75
  76         if (rejected_share_access) {
  77                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  78                         "on %s (0x%x)\n",
  79                         (unsigned int)access_mask,
  80                         smb_fname_str_dbg(smb_fname),
  81                         (unsigned int)rejected_share_access ));
  82                 return NT_STATUS_ACCESS_DENIED;
  83         }
  84
  85         if (get_current_uid(conn) == (uid_t)0) {
  86                 /* I'm sorry sir, I didn't know you were root... */
  87                 DEBUG(10,("smbd_check_access_rights: root override "
  88                         "on %s. Granting 0x%x\n",
  89                         smb_fname_str_dbg(smb_fname),
  90                         (unsigned int)access_mask ));
  91                 return NT_STATUS_OK;
  92         }
  93
  94         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  95                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
  96                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  97                         smb_fname_str_dbg(smb_fname),
  98                         (unsigned int)access_mask ));
  99                 return NT_STATUS_OK;
 100         }
 101
 102         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 103                         (SECINFO_OWNER |
 104                         SECINFO_GROUP |
 105                         SECINFO_DACL),&sd);
 106
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 109                         "on %s: %s\n",
 110                         smb_fname_str_dbg(smb_fname),
 111                         nt_errstr(status)));
 112                 return status;
 113         }
 114
 115         /*
 116          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 117          * owner WRITE_DAC and READ_CONTROL.
 118          */
 119         status = se_access_check(sd,
 120                                 get_current_nttok(conn),
 121                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 122                                 &rejected_mask);
 123
 124         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 125                 "0x%x returning 0x%x (%s)\n",
 126                 smb_fname_str_dbg(smb_fname),
 127                 (unsigned int)access_mask,
 128                 (unsigned int)rejected_mask,
 129                 nt_errstr(status) ));
 130
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 if (DEBUGLEVEL >= 10) {
 133                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 134                                 smb_fname_str_dbg(smb_fname) ));
 135                         NDR_PRINT_DEBUG(security_descriptor, sd);
 136                 }
 137         }
 138
 139         TALLOC_FREE(sd);
 140
 141         if (NT_STATUS_IS_OK(status) ||
 142                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 143                 return status;
 144         }
 145
 146         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 147         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 148                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 149                         (lp_map_readonly(SNUM(conn)) ||
 150                         lp_map_archive(SNUM(conn)) ||
 151                         lp_map_hidden(SNUM(conn)) ||
 152                         lp_map_system(SNUM(conn)))) {
 153                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 154
 155                 DEBUG(10,("smbd_check_access_rights: "
 156                         "overrode "
 157                         "FILE_WRITE_ATTRIBUTES "
 158                         "on file %s\n",
 159                         smb_fname_str_dbg(smb_fname)));
 160         }
 161
 162         if (parent_override_delete(conn,
 163                                 smb_fname,
 164                                 access_mask,
 165                                 rejected_mask)) {
 166                 /* Were we trying to do an open
 167                  * for delete and didn't get DELETE
 168                  * access (only) ? Check if the
 169                  * directory allows DELETE_CHILD.
 170                  * See here:
 171                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 172                  * for details. */
 173
 174                 rejected_mask &= ~DELETE_ACCESS;
 175
 176                 DEBUG(10,("smbd_check_access_rights: "
 177                         "overrode "
 178                         "DELETE_ACCESS on "
 179                         "file %s\n",
 180                         smb_fname_str_dbg(smb_fname)));
 181         }
 182
 183         if (rejected_mask != 0) {
 184                 return NT_STATUS_ACCESS_DENIED;
 185         } else {
 186                 return NT_STATUS_OK;
 187         }
 188 }
 189
 190 static NTSTATUS check_parent_access(struct connection_struct *conn,
 191                                 struct smb_filename *smb_fname,
 192                                 uint32_t access_mask,
 193                                 char **pp_parent_dir)
 194 {
 195         NTSTATUS status;
 196         char *parent_dir = NULL;
 197         struct security_descriptor *parent_sd = NULL;
 198         uint32_t access_granted = 0;
 199
 200         if (!parent_dirname(talloc_tos(),
 201                                 smb_fname->base_name,
 202                                 &parent_dir,
 203                                 NULL)) {
 204                 return NT_STATUS_NO_MEMORY;
 205         }
 206
 207         if (pp_parent_dir) {
 208                 *pp_parent_dir = parent_dir;
 209         }
 210
 211         if (get_current_uid(conn) == (uid_t)0) {
 212                 /* I'm sorry sir, I didn't know you were root... */
 213                 DEBUG(10,("check_parent_access: root override "
 214                         "on %s. Granting 0x%x\n",
 215                         smb_fname_str_dbg(smb_fname),
 216                         (unsigned int)access_mask ));
 217                 return NT_STATUS_OK;
 218         }
 219
 220         status = SMB_VFS_GET_NT_ACL(conn,
 221                                 parent_dir,
 222                                 SECINFO_DACL,
 223                                 &parent_sd);
 224
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 227                         "%s with error %s\n",
 228                         parent_dir,
 229                         nt_errstr(status)));
 230                 return status;
 231         }
 232
 233         /*
 234          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
 235          * owner WRITE_DAC and READ_CONTROL.
 236          */
 237         status = se_access_check(parent_sd,
 238                                 get_current_nttok(conn),
 239                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 240                                 &access_granted);
 241         if(!NT_STATUS_IS_OK(status)) {
 242                 DEBUG(5,("check_parent_access: access check "
 243                         "on directory %s for "
 244                         "path %s for mask 0x%x returned (0x%x) %s\n",
 245                         parent_dir,
 246                         smb_fname->base_name,
 247                         access_mask,
 248                         access_granted,
 249                         nt_errstr(status) ));
 250                 return status;
 251         }
 252
 253         return NT_STATUS_OK;
 254 }
 255
 256 /****************************************************************************
 257  fd support routines - attempt to do a dos_open.
 258 ****************************************************************************/
 259
 260 static NTSTATUS fd_open(struct connection_struct *conn,
 261                     files_struct *fsp,
 262                     int flags,
 263                     mode_t mode)
 264 {
 265         struct smb_filename *smb_fname = fsp->fsp_name;
 266         NTSTATUS status = NT_STATUS_OK;
 267
 268 #ifdef O_NOFOLLOW
 269         /*
 270          * Never follow symlinks on a POSIX client. The
 271          * client should be doing this.
 272          */
 273
 274         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 275                 flags |= O_NOFOLLOW;
 276         }
 277 #endif
 278
 279         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 280         if (fsp->fh->fd == -1) {
 281                 status = map_nt_error_from_unix(errno);
 282                 if (errno == EMFILE) {
 283                         static time_t last_warned = 0L;
 284
 285                         if (time((time_t *) NULL) > last_warned) {
 286                                 DEBUG(0,("Too many open files, unable "
 287                                         "to open more!  smbd's max "
 288                                         "open files = %d\n",
 289                                         lp_max_open_files()));
 290                                 last_warned = time((time_t *) NULL);
 291                         }
 292                 }
 293
 294         }
 295
 296         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 297                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 298                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 299
 300         return status;
 301 }
 302
 303 /****************************************************************************
 304  Close the file associated with a fsp.
 305 ****************************************************************************/
 306
 307 NTSTATUS fd_close(files_struct *fsp)
 308 {
 309         int ret;
 310
 311         if (fsp->dptr) {
 312                 dptr_CloseDir(fsp);
 313         }
 314         if (fsp->fh->fd == -1) {
 315                 return NT_STATUS_OK; /* What we used to call a stat open. */
 316         }
 317         if (fsp->fh->ref_count > 1) {
 318                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 319         }
 320
 321         ret = SMB_VFS_CLOSE(fsp);
 322         fsp->fh->fd = -1;
 323         if (ret == -1) {
 324                 return map_nt_error_from_unix(errno);
 325         }
 326         return NT_STATUS_OK;
 327 }
 328
 329 /****************************************************************************
 330  Change the ownership of a file to that of the parent directory.
 331  Do this by fd if possible.
 332 ****************************************************************************/
 333
 334 void change_file_owner_to_parent(connection_struct *conn,
 335                                         const char *inherit_from_dir,
 336                                         files_struct *fsp)
 337 {
 338         struct smb_filename *smb_fname_parent = NULL;
 339         NTSTATUS status;
 340         int ret;
 341
 342         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 343                                             NULL, NULL, &smb_fname_parent);
 344         if (!NT_STATUS_IS_OK(status)) {
 345                 return;
 346         }
 347
 348         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 349         if (ret == -1) {
 350                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 351                          "directory %s. Error was %s\n",
 352                          smb_fname_str_dbg(smb_fname_parent),
 353                          strerror(errno)));
 354                 TALLOC_FREE(smb_fname_parent);
 355                 return;
 356         }
 357
 358         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 359                 /* Already this uid - no need to change. */
 360                 DEBUG(10,("change_file_owner_to_parent: file %s "
 361                         "is already owned by uid %d\n",
 362                         fsp_str_dbg(fsp),
 363                         (int)fsp->fsp_name->st.st_ex_uid ));
 364                 TALLOC_FREE(smb_fname_parent);
 365                 return;
 366         }
 367
 368         become_root();
 369         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 370         unbecome_root();
 371         if (ret == -1) {
 372                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 373                          "file %s to parent directory uid %u. Error "
 374                          "was %s\n", fsp_str_dbg(fsp),
 375                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 376                          strerror(errno) ));
 377         } else {
 378                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 379                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 380                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 381                 /* Ensure the uid entry is updated. */
 382                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 383         }
 384
 385         TALLOC_FREE(smb_fname_parent);
 386 }
 387
 388 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 389                                        const char *inherit_from_dir,
 390                                        const char *fname,
 391                                        SMB_STRUCT_STAT *psbuf)
 392 {
 393         struct smb_filename *smb_fname_parent = NULL;
 394         struct smb_filename *smb_fname_cwd = NULL;
 395         char *saved_dir = NULL;
 396         TALLOC_CTX *ctx = talloc_tos();
 397         NTSTATUS status = NT_STATUS_OK;
 398         int ret;
 399
 400         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 401                                             &smb_fname_parent);
 402         if (!NT_STATUS_IS_OK(status)) {
 403                 return status;
 404         }
 405
 406         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 407         if (ret == -1) {
 408                 status = map_nt_error_from_unix(errno);
 409                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 410                          "directory %s. Error was %s\n",
 411                          smb_fname_str_dbg(smb_fname_parent),
 412                          strerror(errno)));
 413                 goto out;
 414         }
 415
 416         /* We've already done an lstat into psbuf, and we know it's a
 417            directory. If we can cd into the directory and the dev/ino
 418            are the same then we can safely chown without races as
 419            we're locking the directory in place by being in it.  This
 420            should work on any UNIX (thanks tridge :-). JRA.
 421         */
 422
 423         saved_dir = vfs_GetWd(ctx,conn);
 424         if (!saved_dir) {
 425                 status = map_nt_error_from_unix(errno);
 426                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 427                          "current working directory. Error was %s\n",
 428                          strerror(errno)));
 429                 goto out;
 430         }
 431
 432         /* Chdir into the new path. */
 433         if (vfs_ChDir(conn, fname) == -1) {
 434                 status = map_nt_error_from_unix(errno);
 435                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 436                          "current working directory to %s. Error "
 437                          "was %s\n", fname, strerror(errno) ));
 438                 goto chdir;
 439         }
 440
 441         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 442                                             &smb_fname_cwd);
 443         if (!NT_STATUS_IS_OK(status)) {
 444                 return status;
 445         }
 446
 447         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 448         if (ret == -1) {
 449                 status = map_nt_error_from_unix(errno);
 450                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 451                          "directory '.' (%s) Error was %s\n",
 452                          fname, strerror(errno)));
 453                 goto chdir;
 454         }
 455
 456         /* Ensure we're pointing at the same place. */
 457         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 458             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 459                 DEBUG(0,("change_dir_owner_to_parent: "
 460                          "device/inode on directory %s changed. "
 461                          "Refusing to chown !\n", fname ));
 462                 status = NT_STATUS_ACCESS_DENIED;
 463                 goto chdir;
 464         }
 465
 466         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 467                 /* Already this uid - no need to change. */
 468                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 469                         "is already owned by uid %d\n",
 470                         fname,
 471                         (int)smb_fname_cwd->st.st_ex_uid ));
 472                 status = NT_STATUS_OK;
 473                 goto chdir;
 474         }
 475
 476         become_root();
 477         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 478                             (gid_t)-1);
 479         unbecome_root();
 480         if (ret == -1) {
 481                 status = map_nt_error_from_unix(errno);
 482                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 483                           "directory %s to parent directory uid %u. "
 484                           "Error was %s\n", fname,
 485                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 486                           strerror(errno) ));
 487         } else {
 488                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 489                         "directory %s to parent directory uid %u.\n",
 490                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 491                 /* Ensure the uid entry is updated. */
 492                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 493         }
 494
 495  chdir:
 496         vfs_ChDir(conn,saved_dir);
 497  out:
 498         TALLOC_FREE(smb_fname_parent);
 499         TALLOC_FREE(smb_fname_cwd);
 500         return status;
 501 }
 502
 503 /****************************************************************************
 504  Open a file.
 505 ****************************************************************************/
 506
 507 static NTSTATUS open_file(files_struct *fsp,
 508                           connection_struct *conn,
 509                           struct smb_request *req,
 510                           const char *parent_dir,
 511                           int flags,
 512                           mode_t unx_mode,
 513                           uint32 access_mask, /* client requested access mask. */
 514                           uint32 open_access_mask) /* what we're actually using in the open. */
 515 {
 516         struct smb_filename *smb_fname = fsp->fsp_name;
 517         NTSTATUS status = NT_STATUS_OK;
 518         int accmode = (flags & O_ACCMODE);
 519         int local_flags = flags;
 520         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 521         bool file_created = false;
 522
 523         fsp->fh->fd = -1;
 524         errno = EPERM;
 525
 526         /* Check permissions */
 527
 528         /*
 529          * This code was changed after seeing a client open request
 530          * containing the open mode of (DENY_WRITE/read-only) with
 531          * the 'create if not exist' bit set. The previous code
 532          * would fail to open the file read only on a read-only share
 533          * as it was checking the flags parameter  directly against O_RDONLY,
 534          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 535          * JRA.
 536          */
 537
 538         if (!CAN_WRITE(conn)) {
 539                 /* It's a read-only share - fail if we wanted to write. */
 540                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 541                         DEBUG(3,("Permission denied opening %s\n",
 542                                  smb_fname_str_dbg(smb_fname)));
 543                         return NT_STATUS_ACCESS_DENIED;
 544                 } else if(flags & O_CREAT) {
 545                         /* We don't want to write - but we must make sure that
 546                            O_CREAT doesn't create the file if we have write
 547                            access into the directory.
 548                         */
 549                         flags &= ~(O_CREAT|O_EXCL);
 550                         local_flags &= ~(O_CREAT|O_EXCL);
 551                 }
 552         }
 553
 554         /*
 555          * This little piece of insanity is inspired by the
 556          * fact that an NT client can open a file for O_RDONLY,
 557          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 558          * If the client *can* write to the file, then it expects to
 559          * truncate the file, even though it is opening for readonly.
 560          * Quicken uses this stupid trick in backup file creation...
 561          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 562          * for helping track this one down. It didn't bite us in 2.0.x
 563          * as we always opened files read-write in that release. JRA.
 564          */
 565
 566         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 567                 DEBUG(10,("open_file: truncate requested on read-only open "
 568                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 569                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 570         }
 571
 572         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 573             (!file_existed && (local_flags & O_CREAT)) ||
 574             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 575                 const char *wild;
 576
 577                 /*
 578                  * We can't actually truncate here as the file may be locked.
 579                  * open_file_ntcreate will take care of the truncate later. JRA.
 580                  */
 581
 582                 local_flags &= ~O_TRUNC;
 583
 584 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 585                 /*
 586                  * We would block on opening a FIFO with no one else on the
 587                  * other end. Do what we used to do and add O_NONBLOCK to the
 588                  * open flags. JRA.
 589                  */
 590
 591                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 592                         local_flags |= O_NONBLOCK;
 593                 }
 594 #endif
 595
 596                 /* Don't create files with Microsoft wildcard characters. */
 597                 if (fsp->base_fsp) {
 598                         /*
 599                          * wildcard characters are allowed in stream names
 600                          * only test the basefilename
 601                          */
 602                         wild = fsp->base_fsp->fsp_name->base_name;
 603                 } else {
 604                         wild = smb_fname->base_name;
 605                 }
 606                 if ((local_flags & O_CREAT) && !file_existed &&
 607                     ms_has_wild(wild))  {
 608                         return NT_STATUS_OBJECT_NAME_INVALID;
 609                 }
 610
 611                 /* Can we access this file ? */
 612                 if (!fsp->base_fsp) {
 613                         /* Only do this check on non-stream open. */
 614                         if (file_existed) {
 615                                 status = smbd_check_access_rights(conn,
 616                                                 smb_fname,
 617                                                 access_mask);
 618                         } else if (local_flags & O_CREAT){
 619                                 status = check_parent_access(conn,
 620                                                 smb_fname,
 621                                                 SEC_DIR_ADD_FILE,
 622                                                 NULL);
 623                         } else {
 624                                 /* File didn't exist and no O_CREAT. */
 625                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 626                         }
 627                         if (!NT_STATUS_IS_OK(status)) {
 628                                 DEBUG(10,("open_file: "
 629                                         "%s on file "
 630                                         "%s returned %s\n",
 631                                         file_existed ?
 632                                                 "smbd_check_access_rights" :
 633                                                 "check_parent_access",
 634                                         smb_fname_str_dbg(smb_fname),
 635                                         nt_errstr(status) ));
 636                                 return status;
 637                         }
 638                 }
 639
 640                 /* Actually do the open */
 641                 status = fd_open(conn, fsp, local_flags, unx_mode);
 642                 if (!NT_STATUS_IS_OK(status)) {
 643                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 644                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 645                                  nt_errstr(status),local_flags,flags));
 646                         return status;
 647                 }
 648
 649                 if ((local_flags & O_CREAT) && !file_existed) {
 650                         file_created = true;
 651                 }
 652
 653         } else {
 654                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 655                 if (!file_existed) {
 656                         /* File must exist for a stat open. */
 657                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 658                 }
 659
 660                 status = smbd_check_access_rights(conn,
 661                                 smb_fname,
 662                                 access_mask);
 663
 664                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 665                                 fsp->posix_open &&
 666                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 667                         /* This is a POSIX stat open for delete
 668                          * or rename on a symlink that points
 669                          * nowhere. Allow. */
 670                         DEBUG(10,("open_file: allowing POSIX "
 671                                   "open on bad symlink %s\n",
 672                                   smb_fname_str_dbg(smb_fname)));
 673                         status = NT_STATUS_OK;
 674                 }
 675
 676                 if (!NT_STATUS_IS_OK(status)) {
 677                         DEBUG(10,("open_file: "
 678                                 "smbd_check_access_rights on file "
 679                                 "%s returned %s\n",
 680                                 smb_fname_str_dbg(smb_fname),
 681                                 nt_errstr(status) ));
 682                         return status;
 683                 }
 684         }
 685
 686         if (!file_existed) {
 687                 int ret;
 688
 689                 if (fsp->fh->fd == -1) {
 690                         ret = SMB_VFS_STAT(conn, smb_fname);
 691                 } else {
 692                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 693                         /* If we have an fd, this stat should succeed. */
 694                         if (ret == -1) {
 695                                 DEBUG(0,("Error doing fstat on open file %s "
 696                                          "(%s)\n",
 697                                          smb_fname_str_dbg(smb_fname),
 698                                          strerror(errno) ));
 699                         }
 700                 }
 701
 702                 /* For a non-io open, this stat failing means file not found. JRA */
 703                 if (ret == -1) {
 704                         status = map_nt_error_from_unix(errno);
 705                         fd_close(fsp);
 706                         return status;
 707                 }
 708
 709                 if (file_created) {
 710                         bool need_re_stat = false;
 711                         /* Do all inheritance work after we've
 712                            done a successful stat call and filled
 713                            in the stat struct in fsp->fsp_name. */
 714
 715                         /* Inherit the ACL if required */
 716                         if (lp_inherit_perms(SNUM(conn))) {
 717                                 inherit_access_posix_acl(conn, parent_dir,
 718                                                          smb_fname->base_name,
 719                                                          unx_mode);
 720                                 need_re_stat = true;
 721                         }
 722
 723                         /* Change the owner if required. */
 724                         if (lp_inherit_owner(SNUM(conn))) {
 725                                 change_file_owner_to_parent(conn, parent_dir,
 726                                                             fsp);
 727                                 need_re_stat = true;
 728                         }
 729
 730                         if (need_re_stat) {
 731                                 if (fsp->fh->fd == -1) {
 732                                         ret = SMB_VFS_STAT(conn, smb_fname);
 733                                 } else {
 734                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 735                                         /* If we have an fd, this stat should succeed. */
 736                                         if (ret == -1) {
 737                                                 DEBUG(0,("Error doing fstat on open file %s "
 738                                                          "(%s)\n",
 739                                                          smb_fname_str_dbg(smb_fname),
 740                                                          strerror(errno) ));
 741                                         }
 742                                 }
 743                         }
 744
 745                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 746                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 747                                      smb_fname->base_name);
 748                 }
 749         }
 750
 751         /*
 752          * POSIX allows read-only opens of directories. We don't
 753          * want to do this (we use a different code path for this)
 754          * so catch a directory open and return an EISDIR. JRA.
 755          */
 756
 757         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 758                 fd_close(fsp);
 759                 errno = EISDIR;
 760                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 761         }
 762
 763         fsp->mode = smb_fname->st.st_ex_mode;
 764         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 765         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 766         fsp->file_pid = req ? req->smbpid : 0;
 767         fsp->can_lock = True;
 768         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
 769         if (!CAN_WRITE(conn)) {
 770                 fsp->can_write = False;
 771         } else {
 772                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
 773                         True : False;
 774         }
 775         fsp->print_file = NULL;
 776         fsp->modified = False;
 777         fsp->sent_oplock_break = NO_BREAK_SENT;
 778         fsp->is_directory = False;
 779         if (conn->aio_write_behind_list &&
 780             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 781                        conn->case_sensitive)) {
 782                 fsp->aio_write_behind = True;
 783         }
 784
 785         fsp->wcp = NULL; /* Write cache pointer. */
 786
 787         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 788                  conn->session_info->unix_info->unix_name,
 789                  smb_fname_str_dbg(smb_fname),
 790                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 791                  conn->num_files_open));
 792
 793         errno = 0;
 794         return NT_STATUS_OK;
 795 }
 796
 797 /****************************************************************************
 798  Check if we can open a file with a share mode.
 799  Returns True if conflict, False if not.
 800 ****************************************************************************/
 801
 802 static bool share_conflict(struct share_mode_entry *entry,
 803                            uint32 access_mask,
 804                            uint32 share_access)
 805 {
 806         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 807                   "entry->share_access = 0x%x, "
 808                   "entry->private_options = 0x%x\n",
 809                   (unsigned int)entry->access_mask,
 810                   (unsigned int)entry->share_access,
 811                   (unsigned int)entry->private_options));
 812
 813         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 814                   (unsigned int)access_mask, (unsigned int)share_access));
 815
 816         if ((entry->access_mask & (FILE_WRITE_DATA|
 817                                    FILE_APPEND_DATA|
 818                                    FILE_READ_DATA|
 819                                    FILE_EXECUTE|
 820                                    DELETE_ACCESS)) == 0) {
 821                 DEBUG(10,("share_conflict: No conflict due to "
 822                           "entry->access_mask = 0x%x\n",
 823                           (unsigned int)entry->access_mask ));
 824                 return False;
 825         }
 826
 827         if ((access_mask & (FILE_WRITE_DATA|
 828                             FILE_APPEND_DATA|
 829                             FILE_READ_DATA|
 830                             FILE_EXECUTE|
 831                             DELETE_ACCESS)) == 0) {
 832                 DEBUG(10,("share_conflict: No conflict due to "
 833                           "access_mask = 0x%x\n",
 834                           (unsigned int)access_mask ));
 835                 return False;
 836         }
 837
 838 #if 1 /* JRA TEST - Superdebug. */
 839 #define CHECK_MASK(num, am, right, sa, share) \
 840         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 841                 (unsigned int)(num), (unsigned int)(am), \
 842                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 843         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 844                 (unsigned int)(num), (unsigned int)(sa), \
 845                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 846         if (((am) & (right)) && !((sa) & (share))) { \
 847                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 848 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 849                         (unsigned int)(share) )); \
 850                 return True; \
 851         }
 852 #else
 853 #define CHECK_MASK(num, am, right, sa, share) \
 854         if (((am) & (right)) && !((sa) & (share))) { \
 855                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 857                         (unsigned int)(share) )); \
 858                 return True; \
 859         }
 860 #endif
 861
 862         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 863                    share_access, FILE_SHARE_WRITE);
 864         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 865                    entry->share_access, FILE_SHARE_WRITE);
 866
 867         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 868                    share_access, FILE_SHARE_READ);
 869         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 870                    entry->share_access, FILE_SHARE_READ);
 871
 872         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 873                    share_access, FILE_SHARE_DELETE);
 874         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 875                    entry->share_access, FILE_SHARE_DELETE);
 876
 877         DEBUG(10,("share_conflict: No conflict.\n"));
 878         return False;
 879 }
 880
 881 #if defined(DEVELOPER)
 882 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 883                                       int num,
 884                                       struct share_mode_entry *share_entry)
 885 {
 886         files_struct *fsp;
 887
 888         if (!procid_is_me(&share_entry->pid)) {
 889                 return;
 890         }
 891
 892         if (is_deferred_open_entry(share_entry) &&
 893             !open_was_deferred(sconn, share_entry->op_mid)) {
 894                 char *str = talloc_asprintf(talloc_tos(),
 895                         "Got a deferred entry without a request: "
 896                         "PANIC: %s\n",
 897                         share_mode_str(talloc_tos(), num, share_entry));
 898                 smb_panic(str);
 899         }
 900
 901         if (!is_valid_share_mode_entry(share_entry)) {
 902                 return;
 903         }
 904
 905         fsp = file_find_dif(sconn, share_entry->id,
 906                             share_entry->share_file_id);
 907         if (!fsp) {
 908                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 909                          share_mode_str(talloc_tos(), num, share_entry) ));
 910                 smb_panic("validate_my_share_entries: Cannot match a "
 911                           "share entry with an open file\n");
 912         }
 913
 914         if (is_deferred_open_entry(share_entry)) {
 915                 goto panic;
 916         }
 917
 918         if ((share_entry->op_type == NO_OPLOCK) &&
 919             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
 920                 /* Someone has already written to it, but I haven't yet
 921                  * noticed */
 922                 return;
 923         }
 924
 925         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
 926                 goto panic;
 927         }
 928
 929         return;
 930
 931  panic:
 932         {
 933                 char *str;
 934                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
 935                          share_mode_str(talloc_tos(), num, share_entry) ));
 936                 str = talloc_asprintf(talloc_tos(),
 937                         "validate_my_share_entries: "
 938                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
 939                          fsp->fsp_name->base_name,
 940                          (unsigned int)fsp->oplock_type,
 941                          (unsigned int)share_entry->op_type );
 942                 smb_panic(str);
 943         }
 944 }
 945 #endif
 946
 947 bool is_stat_open(uint32 access_mask)
 948 {
 949         return (access_mask &&
 950                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
 951                                   FILE_WRITE_ATTRIBUTES))==0) &&
 952                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
 953                                  FILE_WRITE_ATTRIBUTES)) != 0));
 954 }
 955
 956 /****************************************************************************
 957  Deal with share modes
 958  Invarient: Share mode must be locked on entry and exit.
 959  Returns -1 on error, or number of share modes on success (may be zero).
 960 ****************************************************************************/
 961
 962 static NTSTATUS open_mode_check(connection_struct *conn,
 963                                 struct share_mode_lock *lck,
 964                                 uint32_t name_hash,
 965                                 uint32 access_mask,
 966                                 uint32 share_access,
 967                                 uint32 create_options,
 968                                 bool *file_existed)
 969 {
 970         int i;
 971
 972         if(lck->num_share_modes == 0) {
 973                 return NT_STATUS_OK;
 974         }
 975
 976         *file_existed = True;
 977
 978         /* A delete on close prohibits everything */
 979
 980         if (is_delete_on_close_set(lck, name_hash)) {
 981                 return NT_STATUS_DELETE_PENDING;
 982         }
 983
 984         if (is_stat_open(access_mask)) {
 985                 /* Stat open that doesn't trigger oplock breaks or share mode
 986                  * checks... ! JRA. */
 987                 return NT_STATUS_OK;
 988         }
 989
 990         /*
 991          * Check if the share modes will give us access.
 992          */
 993
 994 #if defined(DEVELOPER)
 995         for(i = 0; i < lck->num_share_modes; i++) {
 996                 validate_my_share_entries(conn->sconn, i,
 997                                           &lck->share_modes[i]);
 998         }
 999 #endif
1000
1001         if (!lp_share_modes(SNUM(conn))) {
1002                 return NT_STATUS_OK;
1003         }
1004
1005         /* Now we check the share modes, after any oplock breaks. */
1006         for(i = 0; i < lck->num_share_modes; i++) {
1007
1008                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1009                         continue;
1010                 }
1011
1012                 /* someone else has a share lock on it, check to see if we can
1013                  * too */
1014                 if (share_conflict(&lck->share_modes[i],
1015                                    access_mask, share_access)) {
1016                         return NT_STATUS_SHARING_VIOLATION;
1017                 }
1018         }
1019
1020         return NT_STATUS_OK;
1021 }
1022
1023 static bool is_delete_request(files_struct *fsp) {
1024         return ((fsp->access_mask == DELETE_ACCESS) &&
1025                 (fsp->oplock_type == NO_OPLOCK));
1026 }
1027
1028 /*
1029  * Send a break message to the oplock holder and delay the open for
1030  * our client.
1031  */
1032
1033 static NTSTATUS send_break_message(files_struct *fsp,
1034                                         struct share_mode_entry *exclusive,
1035                                         uint64_t mid,
1036                                         int oplock_request)
1037 {
1038         NTSTATUS status;
1039         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1040
1041         DEBUG(10, ("Sending break request to PID %s\n",
1042                    procid_str_static(&exclusive->pid)));
1043         exclusive->op_mid = mid;
1044
1045         /* Create the message. */
1046         share_mode_entry_to_message(msg, exclusive);
1047
1048         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1049            don't want this set in the share mode struct pointed to by lck. */
1050
1051         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1052                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1053                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1054         }
1055
1056         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1057                                     MSG_SMB_BREAK_REQUEST,
1058                                     (uint8 *)msg,
1059                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1060         if (!NT_STATUS_IS_OK(status)) {
1061                 DEBUG(3, ("Could not send oplock break message: %s\n",
1062                           nt_errstr(status)));
1063         }
1064
1065         return status;
1066 }
1067
1068 /*
1069  * Return share_mode_entry pointers for :
1070  * 1). Batch oplock entry.
1071  * 2). Batch or exclusive oplock entry (may be identical to #1).
1072  * bool have_level2_oplock
1073  * bool have_no_oplock.
1074  * Do internal consistency checks on the share mode for a file.
1075  */
1076
1077 static void find_oplock_types(files_struct *fsp,
1078                                 int oplock_request,
1079                                 struct share_mode_lock *lck,
1080                                 struct share_mode_entry **pp_batch,
1081                                 struct share_mode_entry **pp_ex_or_batch,
1082                                 bool *got_level2,
1083                                 bool *got_no_oplock)
1084 {
1085         int i;
1086
1087         *pp_batch = NULL;
1088         *pp_ex_or_batch = NULL;
1089         *got_level2 = false;
1090         *got_no_oplock = false;
1091
1092         /* Ignore stat or internal opens, as is done in
1093                 delay_for_batch_oplocks() and
1094                 delay_for_exclusive_oplocks().
1095          */
1096         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1097                 return;
1098         }
1099
1100         for (i=0; i<lck->num_share_modes; i++) {
1101                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1102                         continue;
1103                 }
1104
1105                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1106                                 is_stat_open(lck->share_modes[i].access_mask)) {
1107                         /* We ignore stat opens in the table - they
1108                            always have NO_OPLOCK and never get or
1109                            cause breaks. JRA. */
1110                         continue;
1111                 }
1112
1113                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114                         /* batch - can only be one. */
1115                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1116                                 smb_panic("Bad batch oplock entry.");
1117                         }
1118                         *pp_batch = &lck->share_modes[i];
1119                 }
1120
1121                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122                         /* Exclusive or batch - can only be one. */
1123                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1124                                 smb_panic("Bad exclusive or batch oplock entry.");
1125                         }
1126                         *pp_ex_or_batch = &lck->share_modes[i];
1127                 }
1128
1129                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130                         if (*pp_batch || *pp_ex_or_batch) {
1131                                 smb_panic("Bad levelII oplock entry.");
1132                         }
1133                         *got_level2 = true;
1134                 }
1135
1136                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1137                         if (*pp_batch || *pp_ex_or_batch) {
1138                                 smb_panic("Bad no oplock entry.");
1139                         }
1140                         *got_no_oplock = true;
1141                 }
1142         }
1143 }
1144
1145 static bool delay_for_batch_oplocks(files_struct *fsp,
1146                                         uint64_t mid,
1147                                         int oplock_request,
1148                                         struct share_mode_entry *batch_entry)
1149 {
1150         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1151                 return false;
1152         }
1153
1154         if (batch_entry != NULL) {
1155                 /* Found a batch oplock */
1156                 send_break_message(fsp, batch_entry, mid, oplock_request);
1157                 return true;
1158         }
1159         return false;
1160 }
1161
1162 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1163                                         uint64_t mid,
1164                                         int oplock_request,
1165                                         struct share_mode_entry *ex_entry)
1166 {
1167         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1168                 return false;
1169         }
1170
1171         if (ex_entry != NULL) {
1172                 /* Found an exclusive or batch oplock */
1173                 bool delay_it = is_delete_request(fsp) ?
1174                                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1175                 if (delay_it) {
1176                         send_break_message(fsp, ex_entry, mid, oplock_request);
1177                         return true;
1178                 }
1179         }
1180         return false;
1181 }
1182
1183 static void grant_fsp_oplock_type(files_struct *fsp,
1184                                 const struct byte_range_lock *br_lck,
1185                                 int oplock_request,
1186                                 bool got_level2_oplock,
1187                                 bool got_a_none_oplock)
1188 {
1189         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1190                             lp_level2_oplocks(SNUM(fsp->conn));
1191
1192         /* Start by granting what the client asked for,
1193            but ensure no SAMBA_PRIVATE bits can be set. */
1194         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1195
1196         if (oplock_request & INTERNAL_OPEN_ONLY) {
1197                 /* No oplocks on internal open. */
1198                 fsp->oplock_type = NO_OPLOCK;
1199                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1200                         fsp->oplock_type, fsp_str_dbg(fsp)));
1201                 return;
1202         } else if (br_lck && br_lck->num_locks > 0) {
1203                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1204                         fsp_str_dbg(fsp)));
1205                 fsp->oplock_type = NO_OPLOCK;
1206         }
1207
1208         if (is_stat_open(fsp->access_mask)) {
1209                 /* Leave the value already set. */
1210                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1211                         fsp->oplock_type, fsp_str_dbg(fsp)));
1212                 return;
1213         }
1214
1215         /*
1216          * Match what was requested (fsp->oplock_type) with
1217          * what was found in the existing share modes.
1218          */
1219
1220         if (got_a_none_oplock) {
1221                 fsp->oplock_type = NO_OPLOCK;
1222         } else if (got_level2_oplock) {
1223                 if (fsp->oplock_type == NO_OPLOCK ||
1224                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1225                         /* Store a level2 oplock, but don't tell the client */
1226                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1227                 } else {
1228                         fsp->oplock_type = LEVEL_II_OPLOCK;
1229                 }
1230         } else {
1231                 /* All share_mode_entries are placeholders or deferred.
1232                  * Silently upgrade to fake levelII if the client didn't
1233                  * ask for an oplock. */
1234                 if (fsp->oplock_type == NO_OPLOCK) {
1235                         /* Store a level2 oplock, but don't tell the client */
1236                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1237                 }
1238         }
1239
1240         /*
1241          * Don't grant level2 to clients that don't want them
1242          * or if we've turned them off.
1243          */
1244         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1245                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1246         }
1247
1248         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1249                   fsp->oplock_type, fsp_str_dbg(fsp)));
1250 }
1251
1252 bool request_timed_out(struct timeval request_time,
1253                        struct timeval timeout)
1254 {
1255         struct timeval now, end_time;
1256         GetTimeOfDay(&now);
1257         end_time = timeval_sum(&request_time, &timeout);
1258         return (timeval_compare(&end_time, &now) < 0);
1259 }
1260
1261 /****************************************************************************
1262  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1263 ****************************************************************************/
1264
1265 static void defer_open(struct share_mode_lock *lck,
1266                        struct timeval request_time,
1267                        struct timeval timeout,
1268                        struct smb_request *req,
1269                        struct deferred_open_record *state)
1270 {
1271         int i;
1272
1273         /* Paranoia check */
1274
1275         for (i=0; i<lck->num_share_modes; i++) {
1276                 struct share_mode_entry *e = &lck->share_modes[i];
1277
1278                 if (!is_deferred_open_entry(e)) {
1279                         continue;
1280                 }
1281
1282                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1283                         DEBUG(0, ("Trying to defer an already deferred "
1284                                 "request: mid=%llu, exiting\n",
1285                                 (unsigned long long)req->mid));
1286                         exit_server("attempt to defer a deferred request");
1287                 }
1288         }
1289
1290         /* End paranoia check */
1291
1292         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1293                   "open entry for mid %llu\n",
1294                   (unsigned int)request_time.tv_sec,
1295                   (unsigned int)request_time.tv_usec,
1296                   (unsigned long long)req->mid));
1297
1298         if (!push_deferred_open_message_smb(req, request_time, timeout,
1299                                        state->id, (char *)state, sizeof(*state))) {
1300                 exit_server("push_deferred_open_message_smb failed");
1301         }
1302         add_deferred_open(lck, req->mid, request_time,
1303                           sconn_server_id(req->sconn), state->id);
1304 }
1305
1306
1307 /****************************************************************************
1308  On overwrite open ensure that the attributes match.
1309 ****************************************************************************/
1310
1311 bool open_match_attributes(connection_struct *conn,
1312                            uint32 old_dos_attr,
1313                            uint32 new_dos_attr,
1314                            mode_t existing_unx_mode,
1315                            mode_t new_unx_mode,
1316                            mode_t *returned_unx_mode)
1317 {
1318         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1319
1320         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1321         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1322
1323         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1324            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1325                 *returned_unx_mode = new_unx_mode;
1326         } else {
1327                 *returned_unx_mode = (mode_t)0;
1328         }
1329
1330         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1331                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1332                   "returned_unx_mode = 0%o\n",
1333                   (unsigned int)old_dos_attr,
1334                   (unsigned int)existing_unx_mode,
1335                   (unsigned int)new_dos_attr,
1336                   (unsigned int)*returned_unx_mode ));
1337
1338         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1339         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1340                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1341                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1342                         return False;
1343                 }
1344         }
1345         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1346                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1347                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1348                         return False;
1349                 }
1350         }
1351         return True;
1352 }
1353
1354 /****************************************************************************
1355  Special FCB or DOS processing in the case of a sharing violation.
1356  Try and find a duplicated file handle.
1357 ****************************************************************************/
1358
1359 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1360                                      connection_struct *conn,
1361                                      files_struct *fsp_to_dup_into,
1362                                      const struct smb_filename *smb_fname,
1363                                      struct file_id id,
1364                                      uint16 file_pid,
1365                                      uint16 vuid,
1366                                      uint32 access_mask,
1367                                      uint32 share_access,
1368                                      uint32 create_options)
1369 {
1370         files_struct *fsp;
1371
1372         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1373                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1374
1375         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1376             fsp = file_find_di_next(fsp)) {
1377
1378                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1379                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1380                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1381                           fsp->fh->fd, (unsigned int)fsp->vuid,
1382                           (unsigned int)fsp->file_pid,
1383                           (unsigned int)fsp->fh->private_options,
1384                           (unsigned int)fsp->access_mask ));
1385
1386                 if (fsp->fh->fd != -1 &&
1387                     fsp->vuid == vuid &&
1388                     fsp->file_pid == file_pid &&
1389                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1390                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1391                     (fsp->access_mask & FILE_WRITE_DATA) &&
1392                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1393                     strequal(fsp->fsp_name->stream_name,
1394                              smb_fname->stream_name)) {
1395                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1396                         break;
1397                 }
1398         }
1399
1400         if (!fsp) {
1401                 return NT_STATUS_NOT_FOUND;
1402         }
1403
1404         /* quite an insane set of semantics ... */
1405         if (is_executable(smb_fname->base_name) &&
1406             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1407                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1408                 return NT_STATUS_INVALID_PARAMETER;
1409         }
1410
1411         /* We need to duplicate this fsp. */
1412         return dup_file_fsp(req, fsp, access_mask, share_access,
1413                             create_options, fsp_to_dup_into);
1414 }
1415
1416 static void schedule_defer_open(struct share_mode_lock *lck,
1417                                 struct timeval request_time,
1418                                 struct smb_request *req)
1419 {
1420         struct deferred_open_record state;
1421
1422         /* This is a relative time, added to the absolute
1423            request_time value to get the absolute timeout time.
1424            Note that if this is the second or greater time we enter
1425            this codepath for this particular request mid then
1426            request_time is left as the absolute time of the *first*
1427            time this request mid was processed. This is what allows
1428            the request to eventually time out. */
1429
1430         struct timeval timeout;
1431
1432         /* Normally the smbd we asked should respond within
1433          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1434          * the client did, give twice the timeout as a safety
1435          * measure here in case the other smbd is stuck
1436          * somewhere else. */
1437
1438         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1439
1440         /* Nothing actually uses state.delayed_for_oplocks
1441            but it's handy to differentiate in debug messages
1442            between a 30 second delay due to oplock break, and
1443            a 1 second delay for share mode conflicts. */
1444
1445         state.delayed_for_oplocks = True;
1446         state.id = lck->id;
1447
1448         if (!request_timed_out(request_time, timeout)) {
1449                 defer_open(lck, request_time, timeout, req, &state);
1450         }
1451 }
1452
1453 /****************************************************************************
1454  Work out what access_mask to use from what the client sent us.
1455 ****************************************************************************/
1456
1457 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1458                                     const struct smb_filename *smb_fname,
1459                                     bool file_existed,
1460                                     uint32_t access_mask,
1461                                     uint32_t *access_mask_out)
1462 {
1463         NTSTATUS status;
1464         uint32_t orig_access_mask = access_mask;
1465         uint32_t rejected_share_access;
1466
1467         /*
1468          * Convert GENERIC bits to specific bits.
1469          */
1470
1471         se_map_generic(&access_mask, &file_generic_mapping);
1472
1473         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1474         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1475                 if (get_current_uid(conn) == (uid_t)0) {
1476                         access_mask  |= FILE_GENERIC_ALL;
1477                 } else if (file_existed) {
1478
1479                         struct security_descriptor *sd;
1480                         uint32_t access_granted = 0;
1481
1482                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1483                                         (SECINFO_OWNER |
1484                                         SECINFO_GROUP |
1485                                         SECINFO_DACL),&sd);
1486
1487                         if (!NT_STATUS_IS_OK(status)) {
1488                                 DEBUG(10,("smbd_calculate_access_mask: "
1489                                         "Could not get acl on file %s: %s\n",
1490                                         smb_fname_str_dbg(smb_fname),
1491                                         nt_errstr(status)));
1492                                 return NT_STATUS_ACCESS_DENIED;
1493                         }
1494
1495                         /*
1496                          * Never test FILE_READ_ATTRIBUTES. se_access_check()
1497                          * also takes care of owner WRITE_DAC and READ_CONTROL.
1498                          */
1499                         status = se_access_check(sd,
1500                                         get_current_nttok(conn),
1501                                         (access_mask & ~FILE_READ_ATTRIBUTES),
1502                                         &access_granted);
1503
1504                         TALLOC_FREE(sd);
1505
1506                         if (!NT_STATUS_IS_OK(status)) {
1507                                 DEBUG(10, ("smbd_calculate_access_mask: "
1508                                         "Access denied on file %s: "
1509                                         "when calculating maximum access\n",
1510                                         smb_fname_str_dbg(smb_fname)));
1511                                 return NT_STATUS_ACCESS_DENIED;
1512                         }
1513
1514                         access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1515                 } else {
1516                         access_mask = FILE_GENERIC_ALL;
1517                 }
1518
1519                 access_mask &= conn->share_access;
1520         }
1521
1522         rejected_share_access = access_mask & ~(conn->share_access);
1523
1524         if (rejected_share_access) {
1525                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1526                         "file %s: rejected by share access mask[0x%08X] "
1527                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1528                         smb_fname_str_dbg(smb_fname),
1529                         conn->share_access,
1530                         orig_access_mask, access_mask,
1531                         rejected_share_access));
1532                 return NT_STATUS_ACCESS_DENIED;
1533         }
1534
1535         *access_mask_out = access_mask;
1536         return NT_STATUS_OK;
1537 }
1538
1539 /****************************************************************************
1540  Remove the deferred open entry under lock.
1541 ****************************************************************************/
1542
1543 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1544                                 struct server_id pid)
1545 {
1546         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1547                         NULL, NULL, NULL);
1548         if (lck == NULL) {
1549                 DEBUG(0, ("could not get share mode lock\n"));
1550                 return;
1551         }
1552         del_deferred_open_entry(lck, mid, pid);
1553         TALLOC_FREE(lck);
1554 }
1555
1556 /****************************************************************
1557  Ensure we get the brlock lock followed by the share mode lock
1558  in the correct order to prevent deadlocks if other smbd's are
1559  using the brlock database on this file simultaneously with this open
1560  (that code also gets the locks in brlock -> share mode lock order).
1561 ****************************************************************/
1562
1563 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1564                                 files_struct *fsp,
1565                                 const struct file_id id,
1566                                 const char *connectpath,
1567                                 const struct smb_filename *smb_fname,
1568                                 const struct timespec *p_old_write_time,
1569                                 struct share_mode_lock **p_lck,
1570                                 struct byte_range_lock **p_br_lck)
1571 {
1572         /* Ordering - we must get the br_lck for this
1573            file before the share mode. */
1574         if (lp_locking(fsp->conn->params)) {
1575                 *p_br_lck = brl_get_locks_readonly(fsp);
1576                 if (*p_br_lck == NULL) {
1577                         DEBUG(0, ("Could not get br_lock\n"));
1578                         return false;
1579                 }
1580                 /* Note - we don't need to free the returned
1581                    br_lck explicitly as it was allocated on talloc_tos()
1582                    and so will be autofreed (and release the lock)
1583                    once the frame context disappears.
1584
1585                    If it was set to fsp->brlock_rec then it was
1586                    talloc_move'd to hang off the fsp pointer and
1587                    in this case is guarenteed to not be holding the
1588                    lock on the brlock database. */
1589         }
1590
1591         *p_lck = get_share_mode_lock(mem_ctx,
1592                                 id,
1593                                 connectpath,
1594                                 smb_fname,
1595                                 p_old_write_time);
1596
1597         if (*p_lck == NULL) {
1598                 DEBUG(0, ("Could not get share mode lock\n"));
1599                 TALLOC_FREE(*p_br_lck);
1600                 return false;
1601         }
1602         return true;
1603 }
1604
1605 /****************************************************************************
1606  Open a file with a share mode. Passed in an already created files_struct *.
1607 ****************************************************************************/
1608
1609 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1610                             struct smb_request *req,
1611                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1612                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1613                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1614                             uint32 create_options,      /* options such as delete on close. */
1615                             uint32 new_dos_attributes,  /* attributes used for new file. */
1616                             int oplock_request,         /* internal Samba oplock codes. */
1617                                                         /* Information (FILE_EXISTS etc.) */
1618                             uint32_t private_flags,     /* Samba specific flags. */
1619                             int *pinfo,
1620                             files_struct *fsp)
1621 {
1622         struct smb_filename *smb_fname = fsp->fsp_name;
1623         int flags=0;
1624         int flags2=0;
1625         bool file_existed = VALID_STAT(smb_fname->st);
1626         bool def_acl = False;
1627         bool posix_open = False;
1628         bool new_file_created = False;
1629         bool clear_ads = false;
1630         struct file_id id;
1631         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1632         mode_t new_unx_mode = (mode_t)0;
1633         mode_t unx_mode = (mode_t)0;
1634         int info;
1635         uint32 existing_dos_attributes = 0;
1636         struct timeval request_time = timeval_zero();
1637         struct share_mode_lock *lck = NULL;
1638         uint32 open_access_mask = access_mask;
1639         NTSTATUS status;
1640         char *parent_dir;
1641
1642         ZERO_STRUCT(id);
1643
1644         if (conn->printer) {
1645                 /*
1646                  * Printers are handled completely differently.
1647                  * Most of the passed parameters are ignored.
1648                  */
1649
1650                 if (pinfo) {
1651                         *pinfo = FILE_WAS_CREATED;
1652                 }
1653
1654                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1655                            smb_fname_str_dbg(smb_fname)));
1656
1657                 if (!req) {
1658                         DEBUG(0,("open_file_ntcreate: printer open without "
1659                                 "an SMB request!\n"));
1660                         return NT_STATUS_INTERNAL_ERROR;
1661                 }
1662
1663                 return print_spool_open(fsp, smb_fname->base_name,
1664                                         req->vuid);
1665         }
1666
1667         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1668                             NULL)) {
1669                 return NT_STATUS_NO_MEMORY;
1670         }
1671
1672         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1673                 posix_open = True;
1674                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1675                 new_dos_attributes = 0;
1676         } else {
1677                 /* Windows allows a new file to be created and
1678                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1679                    sent by the client. Do the same. */
1680
1681                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1682
1683                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1684                  * created new. */
1685                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1686                                      smb_fname, parent_dir);
1687         }
1688
1689         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1690                    "access_mask=0x%x share_access=0x%x "
1691                    "create_disposition = 0x%x create_options=0x%x "
1692                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1693                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1694                    access_mask, share_access, create_disposition,
1695                    create_options, (unsigned int)unx_mode, oplock_request,
1696                    (unsigned int)private_flags));
1697
1698         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1699                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1700                 return NT_STATUS_INTERNAL_ERROR;
1701         }
1702
1703         /*
1704          * Only non-internal opens can be deferred at all
1705          */
1706
1707         if (req) {
1708                 void *ptr;
1709                 if (get_deferred_open_message_state(req,
1710                                 &request_time,
1711                                 &ptr)) {
1712
1713                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1714                         /* Remember the absolute time of the original
1715                            request with this mid. We'll use it later to
1716                            see if this has timed out. */
1717
1718                         /* Remove the deferred open entry under lock. */
1719                         remove_deferred_open_entry(
1720                                 state->id, req->mid,
1721                                 sconn_server_id(req->sconn));
1722
1723                         /* Ensure we don't reprocess this message. */
1724                         remove_deferred_open_message_smb(req->sconn, req->mid);
1725                 }
1726         }
1727
1728         status = check_name(conn, smb_fname->base_name);
1729         if (!NT_STATUS_IS_OK(status)) {
1730                 return status;
1731         }
1732
1733         if (!posix_open) {
1734                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1735                 if (file_existed) {
1736                         existing_dos_attributes = dos_mode(conn, smb_fname);
1737                 }
1738         }
1739
1740         /* ignore any oplock requests if oplocks are disabled */
1741         if (!lp_oplocks(SNUM(conn)) ||
1742             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1743                 /* Mask off everything except the private Samba bits. */
1744                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1745         }
1746
1747         /* this is for OS/2 long file names - say we don't support them */
1748         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1749                 /* OS/2 Workplace shell fix may be main code stream in a later
1750                  * release. */
1751                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1752                          "supported.\n"));
1753                 if (use_nt_status()) {
1754                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1755                 }
1756                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1757         }
1758
1759         switch( create_disposition ) {
1760                 /*
1761                  * Currently we're using FILE_SUPERSEDE as the same as
1762                  * FILE_OVERWRITE_IF but they really are
1763                  * different. FILE_SUPERSEDE deletes an existing file
1764                  * (requiring delete access) then recreates it.
1765                  */
1766                 case FILE_SUPERSEDE:
1767                         /* If file exists replace/overwrite. If file doesn't
1768                          * exist create. */
1769                         flags2 |= (O_CREAT | O_TRUNC);
1770                         clear_ads = true;
1771                         break;
1772
1773                 case FILE_OVERWRITE_IF:
1774                         /* If file exists replace/overwrite. If file doesn't
1775                          * exist create. */
1776                         flags2 |= (O_CREAT | O_TRUNC);
1777                         clear_ads = true;
1778                         break;
1779
1780                 case FILE_OPEN:
1781                         /* If file exists open. If file doesn't exist error. */
1782                         if (!file_existed) {
1783                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1784                                          "requested for file %s and file "
1785                                          "doesn't exist.\n",
1786                                          smb_fname_str_dbg(smb_fname)));
1787                                 errno = ENOENT;
1788                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1789                         }
1790                         break;
1791
1792                 case FILE_OVERWRITE:
1793                         /* If file exists overwrite. If file doesn't exist
1794                          * error. */
1795                         if (!file_existed) {
1796                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1797                                          "requested for file %s and file "
1798                                          "doesn't exist.\n",
1799                                          smb_fname_str_dbg(smb_fname) ));
1800                                 errno = ENOENT;
1801                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1802                         }
1803                         flags2 |= O_TRUNC;
1804                         clear_ads = true;
1805                         break;
1806
1807                 case FILE_CREATE:
1808                         /* If file exists error. If file doesn't exist
1809                          * create. */
1810                         if (file_existed) {
1811                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1812                                          "requested for file %s and file "
1813                                          "already exists.\n",
1814                                          smb_fname_str_dbg(smb_fname)));
1815                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1816                                         errno = EISDIR;
1817                                 } else {
1818                                         errno = EEXIST;
1819                                 }
1820                                 return map_nt_error_from_unix(errno);
1821                         }
1822                         flags2 |= (O_CREAT|O_EXCL);
1823                         break;
1824
1825                 case FILE_OPEN_IF:
1826                         /* If file exists open. If file doesn't exist
1827                          * create. */
1828                         flags2 |= O_CREAT;
1829                         break;
1830
1831                 default:
1832                         return NT_STATUS_INVALID_PARAMETER;
1833         }
1834
1835         /* We only care about matching attributes on file exists and
1836          * overwrite. */
1837
1838         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1839                              (create_disposition == FILE_OVERWRITE_IF))) {
1840                 if (!open_match_attributes(conn, existing_dos_attributes,
1841                                            new_dos_attributes,
1842                                            smb_fname->st.st_ex_mode,
1843                                            unx_mode, &new_unx_mode)) {
1844                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1845                                  "for file %s (%x %x) (0%o, 0%o)\n",
1846                                  smb_fname_str_dbg(smb_fname),
1847                                  existing_dos_attributes,
1848                                  new_dos_attributes,
1849                                  (unsigned int)smb_fname->st.st_ex_mode,
1850                                  (unsigned int)unx_mode ));
1851                         errno = EACCES;
1852                         return NT_STATUS_ACCESS_DENIED;
1853                 }
1854         }
1855
1856         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1857                                         access_mask,
1858                                         &access_mask);
1859         if (!NT_STATUS_IS_OK(status)) {
1860                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1861                         "on file %s returned %s\n",
1862                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1863                 return status;
1864         }
1865
1866         open_access_mask = access_mask;
1867
1868         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1869                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1870         }
1871
1872         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1873                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1874                     access_mask));
1875
1876         /*
1877          * Note that we ignore the append flag as append does not
1878          * mean the same thing under DOS and Unix.
1879          */
1880
1881         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1882                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1883                 /* DENY_DOS opens are always underlying read-write on the
1884                    file handle, no matter what the requested access mask
1885                     says. */
1886                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1887                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1888                         flags = O_RDWR;
1889                 } else {
1890                         flags = O_WRONLY;
1891                 }
1892         } else {
1893                 flags = O_RDONLY;
1894         }
1895
1896         /*
1897          * Currently we only look at FILE_WRITE_THROUGH for create options.
1898          */
1899
1900 #if defined(O_SYNC)
1901         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1902                 flags2 |= O_SYNC;
1903         }
1904 #endif /* O_SYNC */
1905
1906         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1907                 flags2 |= O_APPEND;
1908         }
1909
1910         if (!posix_open && !CAN_WRITE(conn)) {
1911                 /*
1912                  * We should really return a permission denied error if either
1913                  * O_CREAT or O_TRUNC are set, but for compatibility with
1914                  * older versions of Samba we just AND them out.
1915                  */
1916                 flags2 &= ~(O_CREAT|O_TRUNC);
1917         }
1918
1919         /*
1920          * Ensure we can't write on a read-only share or file.
1921          */
1922
1923         if (flags != O_RDONLY && file_existed &&
1924             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1925                 DEBUG(5,("open_file_ntcreate: write access requested for "
1926                          "file %s on read only %s\n",
1927                          smb_fname_str_dbg(smb_fname),
1928                          !CAN_WRITE(conn) ? "share" : "file" ));
1929                 errno = EACCES;
1930                 return NT_STATUS_ACCESS_DENIED;
1931         }
1932
1933         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1934         fsp->share_access = share_access;
1935         fsp->fh->private_options = private_flags;
1936         fsp->access_mask = open_access_mask; /* We change this to the
1937                                               * requested access_mask after
1938                                               * the open is done. */
1939         fsp->posix_open = posix_open;
1940
1941         /* Ensure no SAMBA_PRIVATE bits can be set. */
1942         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1943
1944         if (timeval_is_zero(&request_time)) {
1945                 request_time = fsp->open_time;
1946         }
1947
1948         if (file_existed) {
1949                 struct byte_range_lock *br_lck = NULL;
1950                 struct share_mode_entry *batch_entry = NULL;
1951                 struct share_mode_entry *exclusive_entry = NULL;
1952                 bool got_level2_oplock = false;
1953                 bool got_a_none_oplock = false;
1954
1955                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1956                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1957
1958                 if (!acquire_ordered_locks(talloc_tos(),
1959                                         fsp,
1960                                         id,
1961                                         conn->connectpath,
1962                                         smb_fname,
1963                                         &old_write_time,
1964                                         &lck,
1965                                         &br_lck)) {
1966                         return NT_STATUS_SHARING_VIOLATION;
1967                 }
1968
1969                 /* Get the types we need to examine. */
1970                 find_oplock_types(fsp,
1971                                 oplock_request,
1972                                 lck,
1973                                 &batch_entry,
1974                                 &exclusive_entry,
1975                                 &got_level2_oplock,
1976                                 &got_a_none_oplock);
1977
1978                 /* First pass - send break only on batch oplocks. */
1979                 if ((req != NULL) &&
1980                                 delay_for_batch_oplocks(fsp,
1981                                         req->mid,
1982                                         oplock_request,
1983                                         batch_entry)) {
1984                         schedule_defer_open(lck, request_time, req);
1985                         TALLOC_FREE(lck);
1986                         return NT_STATUS_SHARING_VIOLATION;
1987                 }
1988
1989                 /* Use the client requested access mask here, not the one we
1990                  * open with. */
1991                 status = open_mode_check(conn, lck, fsp->name_hash,
1992                                         access_mask, share_access,
1993                                          create_options, &file_existed);
1994
1995                 if (NT_STATUS_IS_OK(status)) {
1996                         /* We might be going to allow this open. Check oplock
1997                          * status again. */
1998                         /* Second pass - send break for both batch or
1999                          * exclusive oplocks. */
2000                         if ((req != NULL) &&
2001                                         delay_for_exclusive_oplocks(
2002                                                 fsp,
2003                                                 req->mid,
2004                                                 oplock_request,
2005                                                 exclusive_entry)) {
2006                                 schedule_defer_open(lck, request_time, req);
2007                                 TALLOC_FREE(lck);
2008                                 return NT_STATUS_SHARING_VIOLATION;
2009                         }
2010                 }
2011
2012                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2013                         /* DELETE_PENDING is not deferred for a second */
2014                         TALLOC_FREE(lck);
2015                         return status;
2016                 }
2017
2018                 grant_fsp_oplock_type(fsp,
2019                                 br_lck,
2020                                 oplock_request,
2021                                 got_level2_oplock,
2022                                 got_a_none_oplock);
2023
2024                 if (!NT_STATUS_IS_OK(status)) {
2025                         uint32 can_access_mask;
2026                         bool can_access = True;
2027
2028                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2029
2030                         /* Check if this can be done with the deny_dos and fcb
2031                          * calls. */
2032                         if (private_flags &
2033                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2034                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2035                                 if (req == NULL) {
2036                                         DEBUG(0, ("DOS open without an SMB "
2037                                                   "request!\n"));
2038                                         TALLOC_FREE(lck);
2039                                         return NT_STATUS_INTERNAL_ERROR;
2040                                 }
2041
2042                                 /* Use the client requested access mask here,
2043                                  * not the one we open with. */
2044                                 status = fcb_or_dos_open(req,
2045                                                         conn,
2046                                                         fsp,
2047                                                         smb_fname,
2048                                                         id,
2049                                                         req->smbpid,
2050                                                         req->vuid,
2051                                                         access_mask,
2052                                                         share_access,
2053                                                         create_options);
2054
2055                                 if (NT_STATUS_IS_OK(status)) {
2056                                         TALLOC_FREE(lck);
2057                                         if (pinfo) {
2058                                                 *pinfo = FILE_WAS_OPENED;
2059                                         }
2060                                         return NT_STATUS_OK;
2061                                 }
2062                         }
2063
2064                         /*
2065                          * This next line is a subtlety we need for
2066                          * MS-Access. If a file open will fail due to share
2067                          * permissions and also for security (access) reasons,
2068                          * we need to return the access failed error, not the
2069                          * share error. We can't open the file due to kernel
2070                          * oplock deadlock (it's possible we failed above on
2071                          * the open_mode_check()) so use a userspace check.
2072                          */
2073
2074                         if (flags & O_RDWR) {
2075                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2076                         } else if (flags & O_WRONLY) {
2077                                 can_access_mask = FILE_WRITE_DATA;
2078                         } else {
2079                                 can_access_mask = FILE_READ_DATA;
2080                         }
2081
2082                         if (((can_access_mask & FILE_WRITE_DATA) &&
2083                                 !CAN_WRITE(conn)) ||
2084                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2085                                                 smb_fname, can_access_mask))) {
2086                                 can_access = False;
2087                         }
2088
2089                         /*
2090                          * If we're returning a share violation, ensure we
2091                          * cope with the braindead 1 second delay.
2092                          */
2093
2094                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2095                             lp_defer_sharing_violations()) {
2096                                 struct timeval timeout;
2097                                 struct deferred_open_record state;
2098                                 int timeout_usecs;
2099
2100                                 /* this is a hack to speed up torture tests
2101                                    in 'make test' */
2102                                 timeout_usecs = lp_parm_int(SNUM(conn),
2103                                                             "smbd","sharedelay",
2104                                                             SHARING_VIOLATION_USEC_WAIT);
2105
2106                                 /* This is a relative time, added to the absolute
2107                                    request_time value to get the absolute timeout time.
2108                                    Note that if this is the second or greater time we enter
2109                                    this codepath for this particular request mid then
2110                                    request_time is left as the absolute time of the *first*
2111                                    time this request mid was processed. This is what allows
2112                                    the request to eventually time out. */
2113
2114                                 timeout = timeval_set(0, timeout_usecs);
2115
2116                                 /* Nothing actually uses state.delayed_for_oplocks
2117                                    but it's handy to differentiate in debug messages
2118                                    between a 30 second delay due to oplock break, and
2119                                    a 1 second delay for share mode conflicts. */
2120
2121                                 state.delayed_for_oplocks = False;
2122                                 state.id = id;
2123
2124                                 if ((req != NULL)
2125                                     && !request_timed_out(request_time,
2126                                                           timeout)) {
2127                                         defer_open(lck, request_time, timeout,
2128                                                    req, &state);
2129                                 }
2130                         }
2131
2132                         TALLOC_FREE(lck);
2133                         if (can_access) {
2134                                 /*
2135                                  * We have detected a sharing violation here
2136                                  * so return the correct error code
2137                                  */
2138                                 status = NT_STATUS_SHARING_VIOLATION;
2139                         } else {
2140                                 status = NT_STATUS_ACCESS_DENIED;
2141                         }
2142                         return status;
2143                 }
2144
2145                 /*
2146                  * We exit this block with the share entry *locked*.....
2147                  */
2148         }
2149
2150         SMB_ASSERT(!file_existed || (lck != NULL));
2151
2152         /*
2153          * Ensure we pay attention to default ACLs on directories if required.
2154          */
2155
2156         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2157             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2158                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2159         }
2160
2161         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2162                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2163                  (unsigned int)flags, (unsigned int)flags2,
2164                  (unsigned int)unx_mode, (unsigned int)access_mask,
2165                  (unsigned int)open_access_mask));
2166
2167         /*
2168          * open_file strips any O_TRUNC flags itself.
2169          */
2170
2171         fsp_open = open_file(fsp, conn, req, parent_dir,
2172                              flags|flags2, unx_mode, access_mask,
2173                              open_access_mask);
2174
2175         if (!NT_STATUS_IS_OK(fsp_open)) {
2176                 TALLOC_FREE(lck);
2177                 return fsp_open;
2178         }
2179
2180         if (!file_existed) {
2181                 struct byte_range_lock *br_lck = NULL;
2182                 struct share_mode_entry *batch_entry = NULL;
2183                 struct share_mode_entry *exclusive_entry = NULL;
2184                 bool got_level2_oplock = false;
2185                 bool got_a_none_oplock = false;
2186                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2187                 /*
2188                  * Deal with the race condition where two smbd's detect the
2189                  * file doesn't exist and do the create at the same time. One
2190                  * of them will win and set a share mode, the other (ie. this
2191                  * one) should check if the requested share mode for this
2192                  * create is allowed.
2193                  */
2194
2195                 /*
2196                  * Now the file exists and fsp is successfully opened,
2197                  * fsp->dev and fsp->inode are valid and should replace the
2198                  * dev=0,inode=0 from a non existent file. Spotted by
2199                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2200                  */
2201
2202                 id = fsp->file_id;
2203
2204                 if (!acquire_ordered_locks(talloc_tos(),
2205                                         fsp,
2206                                         id,
2207                                         conn->connectpath,
2208                                         smb_fname,
2209                                         &old_write_time,
2210                                         &lck,
2211                                         &br_lck)) {
2212                         return NT_STATUS_SHARING_VIOLATION;
2213                 }
2214
2215                 /* Get the types we need to examine. */
2216                 find_oplock_types(fsp,
2217                                 oplock_request,
2218                                 lck,
2219                                 &batch_entry,
2220                                 &exclusive_entry,
2221                                 &got_level2_oplock,
2222                                 &got_a_none_oplock);
2223
2224                 /* First pass - send break only on batch oplocks. */
2225                 if ((req != NULL) &&
2226                                 delay_for_batch_oplocks(fsp,
2227                                         req->mid,
2228                                         oplock_request,
2229                                         batch_entry)) {
2230                         schedule_defer_open(lck, request_time, req);
2231                         TALLOC_FREE(lck);
2232                         fd_close(fsp);
2233                         return NT_STATUS_SHARING_VIOLATION;
2234                 }
2235
2236                 status = open_mode_check(conn, lck, fsp->name_hash,
2237                                         access_mask, share_access,
2238                                          create_options, &file_existed);
2239
2240                 if (NT_STATUS_IS_OK(status)) {
2241                         /* We might be going to allow this open. Check oplock
2242                          * status again. */
2243                         /* Second pass - send break for both batch or
2244                          * exclusive oplocks. */
2245                         if ((req != NULL) &&
2246                                         delay_for_exclusive_oplocks(
2247                                                 fsp,
2248                                                 req->mid,
2249                                                 oplock_request,
2250                                                 exclusive_entry)) {
2251                                 schedule_defer_open(lck, request_time, req);
2252                                 TALLOC_FREE(lck);
2253                                 fd_close(fsp);
2254                                 return NT_STATUS_SHARING_VIOLATION;
2255                         }
2256                 }
2257
2258                 if (!NT_STATUS_IS_OK(status)) {
2259                         struct deferred_open_record state;
2260
2261                         state.delayed_for_oplocks = False;
2262                         state.id = id;
2263
2264                         /* Do it all over again immediately. In the second
2265                          * round we will find that the file existed and handle
2266                          * the DELETE_PENDING and FCB cases correctly. No need
2267                          * to duplicate the code here. Essentially this is a
2268                          * "goto top of this function", but don't tell
2269                          * anybody... */
2270
2271                         if (req != NULL) {
2272                                 defer_open(lck, request_time, timeval_zero(),
2273                                            req, &state);
2274                         }
2275                         TALLOC_FREE(lck);
2276                         fd_close(fsp);
2277                         return status;
2278                 }
2279
2280                 grant_fsp_oplock_type(fsp,
2281                                 br_lck,
2282                                 oplock_request,
2283                                 got_level2_oplock,
2284                                 got_a_none_oplock);
2285
2286                 /*
2287                  * We exit this block with the share entry *locked*.....
2288                  */
2289
2290         }
2291
2292         SMB_ASSERT(lck != NULL);
2293
2294         /* Delete streams if create_disposition requires it */
2295         if (file_existed && clear_ads &&
2296             !is_ntfs_stream_smb_fname(smb_fname)) {
2297                 status = delete_all_streams(conn, smb_fname->base_name);
2298                 if (!NT_STATUS_IS_OK(status)) {
2299                         TALLOC_FREE(lck);
2300                         fd_close(fsp);
2301                         return status;
2302                 }
2303         }
2304
2305         /* note that we ignore failure for the following. It is
2306            basically a hack for NFS, and NFS will never set one of
2307            these only read them. Nobody but Samba can ever set a deny
2308            mode and we have already checked our more authoritative
2309            locking database for permission to set this deny mode. If
2310            the kernel refuses the operations then the kernel is wrong.
2311            note that GPFS supports it as well - jmcd */
2312
2313         if (fsp->fh->fd != -1) {
2314                 int ret_flock;
2315                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2316                 if(ret_flock == -1 ){
2317
2318                         TALLOC_FREE(lck);
2319                         fd_close(fsp);
2320
2321                         return NT_STATUS_SHARING_VIOLATION;
2322                 }
2323         }
2324
2325         /*
2326          * At this point onwards, we can guarentee that the share entry
2327          * is locked, whether we created the file or not, and that the
2328          * deny mode is compatible with all current opens.
2329          */
2330
2331         /*
2332          * If requested, truncate the file.
2333          */
2334
2335         if (file_existed && (flags2&O_TRUNC)) {
2336                 /*
2337                  * We are modifing the file after open - update the stat
2338                  * struct..
2339                  */
2340                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2341                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2342                         status = map_nt_error_from_unix(errno);
2343                         TALLOC_FREE(lck);
2344                         fd_close(fsp);
2345                         return status;
2346                 }
2347         }
2348
2349         /*
2350          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2351          * but we don't have to store this - just ignore it on access check.
2352          */
2353         if (conn->sconn->using_smb2) {
2354                 /*
2355                  * SMB2 doesn't return it (according to Microsoft tests).
2356                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2357                  * File created with access = 0x7 (Read, Write, Delete)
2358                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2359                  */
2360                 fsp->access_mask = access_mask;
2361         } else {
2362                 /* But SMB1 does. */
2363                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2364         }
2365
2366         if (file_existed) {
2367                 /* stat opens on existing files don't get oplocks. */
2368                 if (is_stat_open(open_access_mask)) {
2369                         fsp->oplock_type = NO_OPLOCK;
2370                 }
2371
2372                 if (!(flags2 & O_TRUNC)) {
2373                         info = FILE_WAS_OPENED;
2374                 } else {
2375                         info = FILE_WAS_OVERWRITTEN;
2376                 }
2377         } else {
2378                 info = FILE_WAS_CREATED;
2379         }
2380
2381         if (pinfo) {
2382                 *pinfo = info;
2383         }
2384
2385         /*
2386          * Setup the oplock info in both the shared memory and
2387          * file structs.
2388          */
2389
2390         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2391                 /*
2392                  * Could not get the kernel oplock or there are byte-range
2393                  * locks on the file.
2394                  */
2395                 fsp->oplock_type = NO_OPLOCK;
2396         }
2397
2398         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2399                 new_file_created = True;
2400         }
2401
2402         set_share_mode(lck, fsp, get_current_uid(conn),
2403                         req ? req->mid : 0,
2404                        fsp->oplock_type);
2405
2406         /* Handle strange delete on close create semantics. */
2407         if (create_options & FILE_DELETE_ON_CLOSE) {
2408
2409                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2410
2411                 if (!NT_STATUS_IS_OK(status)) {
2412                         /* Remember to delete the mode we just added. */
2413                         del_share_mode(lck, fsp);
2414                         TALLOC_FREE(lck);
2415                         fd_close(fsp);
2416                         return status;
2417                 }
2418                 /* Note that here we set the *inital* delete on close flag,
2419                    not the regular one. The magic gets handled in close. */
2420                 fsp->initial_delete_on_close = True;
2421         }
2422
2423         if (new_file_created) {
2424                 /* Files should be initially set as archive */
2425                 if (lp_map_archive(SNUM(conn)) ||
2426                     lp_store_dos_attributes(SNUM(conn))) {
2427                         if (!posix_open) {
2428                                 if (file_set_dosmode(conn, smb_fname,
2429                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2430                                             parent_dir, true) == 0) {
2431                                         unx_mode = smb_fname->st.st_ex_mode;
2432                                 }
2433                         }
2434                 }
2435         }
2436
2437         /* Determine sparse flag. */
2438         if (posix_open) {
2439                 /* POSIX opens are sparse by default. */
2440                 fsp->is_sparse = true;
2441         } else {
2442                 fsp->is_sparse = (file_existed &&
2443                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2444         }
2445
2446         /*
2447          * Take care of inherited ACLs on created files - if default ACL not
2448          * selected.
2449          */
2450
2451         if (!posix_open && !file_existed && !def_acl) {
2452
2453                 int saved_errno = errno; /* We might get ENOSYS in the next
2454                                           * call.. */
2455
2456                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2457                     errno == ENOSYS) {
2458                         errno = saved_errno; /* Ignore ENOSYS */
2459                 }
2460
2461         } else if (new_unx_mode) {
2462
2463                 int ret = -1;
2464
2465                 /* Attributes need changing. File already existed. */
2466
2467                 {
2468                         int saved_errno = errno; /* We might get ENOSYS in the
2469                                                   * next call.. */
2470                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2471
2472                         if (ret == -1 && errno == ENOSYS) {
2473                                 errno = saved_errno; /* Ignore ENOSYS */
2474                         } else {
2475                                 DEBUG(5, ("open_file_ntcreate: reset "
2476                                           "attributes of file %s to 0%o\n",
2477                                           smb_fname_str_dbg(smb_fname),
2478                                           (unsigned int)new_unx_mode));
2479                                 ret = 0; /* Don't do the fchmod below. */
2480                         }
2481                 }
2482
2483                 if ((ret == -1) &&
2484                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2485                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2486                                   "attributes of file %s to 0%o\n",
2487                                   smb_fname_str_dbg(smb_fname),
2488                                   (unsigned int)new_unx_mode));
2489         }
2490
2491         /* If this is a successful open, we must remove any deferred open
2492          * records. */
2493         if (req != NULL) {
2494                 del_deferred_open_entry(lck, req->mid,
2495                                         sconn_server_id(req->sconn));
2496         }
2497         TALLOC_FREE(lck);
2498
2499         return NT_STATUS_OK;
2500 }
2501
2502
2503 /****************************************************************************
2504  Open a file for for write to ensure that we can fchmod it.
2505 ****************************************************************************/
2506
2507 NTSTATUS open_file_fchmod(connection_struct *conn,
2508                           struct smb_filename *smb_fname,
2509                           files_struct **result)
2510 {
2511         if (!VALID_STAT(smb_fname->st)) {
2512                 return NT_STATUS_INVALID_PARAMETER;
2513         }
2514
2515         return SMB_VFS_CREATE_FILE(
2516                 conn,                                   /* conn */
2517                 NULL,                                   /* req */
2518                 0,                                      /* root_dir_fid */
2519                 smb_fname,                              /* fname */
2520                 FILE_WRITE_DATA,                        /* access_mask */
2521                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2522                     FILE_SHARE_DELETE),
2523                 FILE_OPEN,                              /* create_disposition*/
2524                 0,                                      /* create_options */
2525                 0,                                      /* file_attributes */
2526                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2527                 0,                                      /* allocation_size */
2528                 0,                                      /* private_flags */
2529                 NULL,                                   /* sd */
2530                 NULL,                                   /* ea_list */
2531                 result,                                 /* result */
2532                 NULL);                                  /* pinfo */
2533 }
2534
2535 static NTSTATUS mkdir_internal(connection_struct *conn,
2536                                struct smb_filename *smb_dname,
2537                                uint32 file_attributes)
2538 {
2539         mode_t mode;
2540         char *parent_dir = NULL;
2541         NTSTATUS status;
2542         bool posix_open = false;
2543         bool need_re_stat = false;
2544         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2545
2546         if(access_mask & ~(conn->share_access)) {
2547                 DEBUG(5,("mkdir_internal: failing share access "
2548                          "%s\n", lp_servicename(SNUM(conn))));
2549                 return NT_STATUS_ACCESS_DENIED;
2550         }
2551
2552         status = check_name(conn, smb_dname->base_name);
2553         if (!NT_STATUS_IS_OK(status)) {
2554                 return status;
2555         }
2556
2557         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2558                             NULL)) {
2559                 return NT_STATUS_NO_MEMORY;
2560         }
2561
2562         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2563                 posix_open = true;
2564                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2565         } else {
2566                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2567         }
2568
2569         status = check_parent_access(conn,
2570                                         smb_dname,
2571                                         access_mask,
2572                                         &parent_dir);
2573         if(!NT_STATUS_IS_OK(status)) {
2574                 DEBUG(5,("mkdir_internal: check_parent_access "
2575                         "on directory %s for path %s returned %s\n",
2576                         parent_dir,
2577                         smb_dname->base_name,
2578                         nt_errstr(status) ));
2579                 return status;
2580         }
2581
2582         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2583                 return map_nt_error_from_unix(errno);
2584         }
2585
2586         /* Ensure we're checking for a symlink here.... */
2587         /* We don't want to get caught by a symlink racer. */
2588
2589         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2590                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2591                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2592                 return map_nt_error_from_unix(errno);
2593         }
2594
2595         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2596                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2597                           smb_fname_str_dbg(smb_dname)));
2598                 return NT_STATUS_NOT_A_DIRECTORY;
2599         }
2600
2601         if (lp_store_dos_attributes(SNUM(conn))) {
2602                 if (!posix_open) {
2603                         file_set_dosmode(conn, smb_dname,
2604                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2605                                          parent_dir, true);
2606                 }
2607         }
2608
2609         if (lp_inherit_perms(SNUM(conn))) {
2610                 inherit_access_posix_acl(conn, parent_dir,
2611                                          smb_dname->base_name, mode);
2612                 need_re_stat = true;
2613         }
2614
2615         if (!posix_open) {
2616                 /*
2617                  * Check if high bits should have been set,
2618                  * then (if bits are missing): add them.
2619                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2620                  * dir.
2621                  */
2622                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2623                     (mode & ~smb_dname->st.st_ex_mode)) {
2624                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2625                                       (smb_dname->st.st_ex_mode |
2626                                           (mode & ~smb_dname->st.st_ex_mode)));
2627                         need_re_stat = true;
2628                 }
2629         }
2630
2631         /* Change the owner if required. */
2632         if (lp_inherit_owner(SNUM(conn))) {
2633                 change_dir_owner_to_parent(conn, parent_dir,
2634                                            smb_dname->base_name,
2635                                            &smb_dname->st);
2636                 need_re_stat = true;
2637         }
2638
2639         if (need_re_stat) {
2640                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2641                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2642                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2643                         return map_nt_error_from_unix(errno);
2644                 }
2645         }
2646
2647         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2648                      smb_dname->base_name);
2649
2650         return NT_STATUS_OK;
2651 }
2652
2653 /****************************************************************************
2654  Ensure we didn't get symlink raced on opening a directory.
2655 ****************************************************************************/
2656
2657 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2658                         const SMB_STRUCT_STAT *sbuf2)
2659 {
2660         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2661                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2662                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2663                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2664                 return false;
2665         }
2666         return true;
2667 }
2668
2669 /****************************************************************************
2670  Open a directory from an NT SMB call.
2671 ****************************************************************************/
2672
2673 static NTSTATUS open_directory(connection_struct *conn,
2674                                struct smb_request *req,
2675                                struct smb_filename *smb_dname,
2676                                uint32 access_mask,
2677                                uint32 share_access,
2678                                uint32 create_disposition,
2679                                uint32 create_options,
2680                                uint32 file_attributes,
2681                                int *pinfo,
2682                                files_struct **result)
2683 {
2684         files_struct *fsp = NULL;
2685         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2686         struct share_mode_lock *lck = NULL;
2687         NTSTATUS status;
2688         struct timespec mtimespec;
2689         int info = 0;
2690
2691         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2692
2693         /* Ensure we have a directory attribute. */
2694         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2695
2696         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2697                  "share_access = 0x%x create_options = 0x%x, "
2698                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2699                  smb_fname_str_dbg(smb_dname),
2700                  (unsigned int)access_mask,
2701                  (unsigned int)share_access,
2702                  (unsigned int)create_options,
2703                  (unsigned int)create_disposition,
2704                  (unsigned int)file_attributes));
2705
2706         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2707                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2708                         is_ntfs_stream_smb_fname(smb_dname)) {
2709                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2710                           smb_fname_str_dbg(smb_dname)));
2711                 return NT_STATUS_NOT_A_DIRECTORY;
2712         }
2713
2714         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2715                                             access_mask, &access_mask);
2716         if (!NT_STATUS_IS_OK(status)) {
2717                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2718                         "on file %s returned %s\n",
2719                         smb_fname_str_dbg(smb_dname),
2720                         nt_errstr(status)));
2721                 return status;
2722         }
2723
2724         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2725                         !security_token_has_privilege(get_current_nttok(conn),
2726                                         SEC_PRIV_SECURITY)) {
2727                 DEBUG(10, ("open_directory: open on %s "
2728                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2729                         smb_fname_str_dbg(smb_dname)));
2730                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2731         }
2732
2733         switch( create_disposition ) {
2734                 case FILE_OPEN:
2735
2736                         if (!dir_existed) {
2737                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2738                         }
2739
2740                         info = FILE_WAS_OPENED;
2741                         break;
2742
2743                 case FILE_CREATE:
2744
2745                         /* If directory exists error. If directory doesn't
2746                          * exist create. */
2747
2748                         if (dir_existed) {
2749                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2750                                 DEBUG(2, ("open_directory: unable to create "
2751                                           "%s. Error was %s\n",
2752                                           smb_fname_str_dbg(smb_dname),
2753                                           nt_errstr(status)));
2754                                 return status;
2755                         }
2756
2757                         status = mkdir_internal(conn, smb_dname,
2758                                                 file_attributes);
2759
2760                         if (!NT_STATUS_IS_OK(status)) {
2761                                 DEBUG(2, ("open_directory: unable to create "
2762                                           "%s. Error was %s\n",
2763                                           smb_fname_str_dbg(smb_dname),
2764                                           nt_errstr(status)));
2765                                 return status;
2766                         }
2767
2768                         info = FILE_WAS_CREATED;
2769                         break;
2770
2771                 case FILE_OPEN_IF:
2772                         /*
2773                          * If directory exists open. If directory doesn't
2774                          * exist create.
2775                          */
2776
2777                         if (dir_existed) {
2778                                 status = NT_STATUS_OK;
2779                                 info = FILE_WAS_OPENED;
2780                         } else {
2781                                 status = mkdir_internal(conn, smb_dname,
2782                                                 file_attributes);
2783
2784                                 if (NT_STATUS_IS_OK(status)) {
2785                                         info = FILE_WAS_CREATED;
2786                                 } else {
2787                                         /* Cope with create race. */
2788                                         if (!NT_STATUS_EQUAL(status,
2789                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2790                                                 DEBUG(2, ("open_directory: unable to create "
2791                                                         "%s. Error was %s\n",
2792                                                         smb_fname_str_dbg(smb_dname),
2793                                                         nt_errstr(status)));
2794                                                 return status;
2795                                         }
2796                                         info = FILE_WAS_OPENED;
2797                                 }
2798                         }
2799
2800                         break;
2801
2802                 case FILE_SUPERSEDE:
2803                 case FILE_OVERWRITE:
2804                 case FILE_OVERWRITE_IF:
2805                 default:
2806                         DEBUG(5,("open_directory: invalid create_disposition "
2807                                  "0x%x for directory %s\n",
2808                                  (unsigned int)create_disposition,
2809                                  smb_fname_str_dbg(smb_dname)));
2810                         return NT_STATUS_INVALID_PARAMETER;
2811         }
2812
2813         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2814                 DEBUG(5,("open_directory: %s is not a directory !\n",
2815                          smb_fname_str_dbg(smb_dname)));
2816                 return NT_STATUS_NOT_A_DIRECTORY;
2817         }
2818
2819         if (info == FILE_WAS_OPENED) {
2820                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2821                 if (!NT_STATUS_IS_OK(status)) {
2822                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2823                                 "file %s failed with %s\n",
2824                                 smb_fname_str_dbg(smb_dname),
2825                                 nt_errstr(status)));
2826                         return status;
2827                 }
2828         }
2829
2830         status = file_new(req, conn, &fsp);
2831         if(!NT_STATUS_IS_OK(status)) {
2832                 return status;
2833         }
2834
2835         /*
2836          * Setup the files_struct for it.
2837          */
2838
2839         fsp->mode = smb_dname->st.st_ex_mode;
2840         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2841         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2842         fsp->file_pid = req ? req->smbpid : 0;
2843         fsp->can_lock = False;
2844         fsp->can_read = False;
2845         fsp->can_write = False;
2846
2847         fsp->share_access = share_access;
2848         fsp->fh->private_options = 0;
2849         /*
2850          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2851          */
2852         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2853         fsp->print_file = NULL;
2854         fsp->modified = False;
2855         fsp->oplock_type = NO_OPLOCK;
2856         fsp->sent_oplock_break = NO_BREAK_SENT;
2857         fsp->is_directory = True;
2858         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2859         status = fsp_set_smb_fname(fsp, smb_dname);
2860         if (!NT_STATUS_IS_OK(status)) {
2861                 file_free(req, fsp);
2862                 return status;
2863         }
2864
2865         mtimespec = smb_dname->st.st_ex_mtime;
2866
2867 #ifdef O_DIRECTORY
2868         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2869 #else
2870         /* POSIX allows us to open a directory with O_RDONLY. */
2871         status = fd_open(conn, fsp, O_RDONLY, 0);
2872 #endif
2873         if (!NT_STATUS_IS_OK(status)) {
2874                 DEBUG(5, ("open_directory: Could not open fd for "
2875                         "%s (%s)\n",
2876                         smb_fname_str_dbg(smb_dname),
2877                         nt_errstr(status)));
2878                 file_free(req, fsp);
2879                 return status;
2880         }
2881
2882         status = vfs_stat_fsp(fsp);
2883         if (!NT_STATUS_IS_OK(status)) {
2884                 fd_close(fsp);
2885                 file_free(req, fsp);
2886                 return status;
2887         }
2888
2889         /* Ensure there was no race condition. */
2890         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2891                 DEBUG(5,("open_directory: stat struct differs for "
2892                         "directory %s.\n",
2893                         smb_fname_str_dbg(smb_dname)));
2894                 fd_close(fsp);
2895                 file_free(req, fsp);
2896                 return NT_STATUS_ACCESS_DENIED;
2897         }
2898
2899         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2900                                   conn->connectpath, smb_dname, &mtimespec);
2901
2902         if (lck == NULL) {
2903                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2904                           "%s\n", smb_fname_str_dbg(smb_dname)));
2905                 fd_close(fsp);
2906                 file_free(req, fsp);
2907                 return NT_STATUS_SHARING_VIOLATION;
2908         }
2909
2910         status = open_mode_check(conn, lck, fsp->name_hash,
2911                                 access_mask, share_access,
2912                                  create_options, &dir_existed);
2913
2914         if (!NT_STATUS_IS_OK(status)) {
2915                 TALLOC_FREE(lck);
2916                 fd_close(fsp);
2917                 file_free(req, fsp);
2918                 return status;
2919         }
2920
2921         set_share_mode(lck, fsp, get_current_uid(conn),
2922                         req ? req->mid : 0, NO_OPLOCK);
2923
2924         /* For directories the delete on close bit at open time seems
2925            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2926         if (create_options & FILE_DELETE_ON_CLOSE) {
2927                 status = can_set_delete_on_close(fsp, 0);
2928                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2929                         TALLOC_FREE(lck);
2930                         fd_close(fsp);
2931                         file_free(req, fsp);
2932                         return status;
2933                 }
2934
2935                 if (NT_STATUS_IS_OK(status)) {
2936                         /* Note that here we set the *inital* delete on close flag,
2937                            not the regular one. The magic gets handled in close. */
2938                         fsp->initial_delete_on_close = True;
2939                 }
2940         }
2941
2942         TALLOC_FREE(lck);
2943
2944         if (pinfo) {
2945                 *pinfo = info;
2946         }
2947
2948         *result = fsp;
2949         return NT_STATUS_OK;
2950 }
2951
2952 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2953                           struct smb_filename *smb_dname)
2954 {
2955         NTSTATUS status;
2956         files_struct *fsp;
2957
2958         status = SMB_VFS_CREATE_FILE(
2959                 conn,                                   /* conn */
2960                 req,                                    /* req */
2961                 0,                                      /* root_dir_fid */
2962                 smb_dname,                              /* fname */
2963                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2964                 FILE_SHARE_NONE,                        /* share_access */
2965                 FILE_CREATE,                            /* create_disposition*/
2966                 FILE_DIRECTORY_FILE,                    /* create_options */
2967                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2968                 0,                                      /* oplock_request */
2969                 0,                                      /* allocation_size */
2970                 0,                                      /* private_flags */
2971                 NULL,                                   /* sd */
2972                 NULL,                                   /* ea_list */
2973                 &fsp,                                   /* result */
2974                 NULL);                                  /* pinfo */
2975
2976         if (NT_STATUS_IS_OK(status)) {
2977                 close_file(req, fsp, NORMAL_CLOSE);
2978         }
2979
2980         return status;
2981 }
2982
2983 /****************************************************************************
2984  Receive notification that one of our open files has been renamed by another
2985  smbd process.
2986 ****************************************************************************/
2987
2988 void msg_file_was_renamed(struct messaging_context *msg,
2989                           void *private_data,
2990                           uint32_t msg_type,
2991                           struct server_id server_id,
2992                           DATA_BLOB *data)
2993 {
2994         files_struct *fsp;
2995         char *frm = (char *)data->data;
2996         struct file_id id;
2997         const char *sharepath;
2998         const char *base_name;
2999         const char *stream_name;
3000         struct smb_filename *smb_fname = NULL;
3001         size_t sp_len, bn_len;
3002         NTSTATUS status;
3003         struct smbd_server_connection *sconn =
3004                 talloc_get_type_abort(private_data,
3005                 struct smbd_server_connection);
3006
3007         if (data->data == NULL
3008             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3009                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3010                           (int)data->length));
3011                 return;
3012         }
3013
3014         /* Unpack the message. */
3015         pull_file_id_24(frm, &id);
3016         sharepath = &frm[24];
3017         sp_len = strlen(sharepath);
3018         base_name = sharepath + sp_len + 1;
3019         bn_len = strlen(base_name);
3020         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3021
3022         /* stream_name must always be NULL if there is no stream. */
3023         if (stream_name[0] == '\0') {
3024                 stream_name = NULL;
3025         }
3026
3027         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3028                                             stream_name, NULL, &smb_fname);
3029         if (!NT_STATUS_IS_OK(status)) {
3030                 return;
3031         }
3032
3033         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3034                 "file_id %s\n",
3035                 sharepath, smb_fname_str_dbg(smb_fname),
3036                 file_id_string_tos(&id)));
3037
3038         for(fsp = file_find_di_first(sconn, id); fsp;
3039             fsp = file_find_di_next(fsp)) {
3040                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3041
3042                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3043                                 fsp->fnum, fsp_str_dbg(fsp),
3044                                 smb_fname_str_dbg(smb_fname)));
3045                         status = fsp_set_smb_fname(fsp, smb_fname);
3046                         if (!NT_STATUS_IS_OK(status)) {
3047                                 goto out;
3048                         }
3049                 } else {
3050                         /* TODO. JRA. */
3051                         /* Now we have the complete path we can work out if this is
3052                            actually within this share and adjust newname accordingly. */
3053                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3054                                 "not sharepath %s) "
3055                                 "fnum %d from %s -> %s\n",
3056                                 fsp->conn->connectpath,
3057                                 sharepath,
3058                                 fsp->fnum,
3059                                 fsp_str_dbg(fsp),
3060                                 smb_fname_str_dbg(smb_fname)));
3061                 }
3062         }
3063  out:
3064         TALLOC_FREE(smb_fname);
3065         return;
3066 }
3067
3068 /*
3069  * If a main file is opened for delete, all streams need to be checked for
3070  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3071  * If that works, delete them all by setting the delete on close and close.
3072  */
3073
3074 NTSTATUS open_streams_for_delete(connection_struct *conn,
3075                                         const char *fname)
3076 {
3077         struct stream_struct *stream_info = NULL;
3078         files_struct **streams = NULL;
3079         int i;
3080         unsigned int num_streams = 0;
3081         TALLOC_CTX *frame = talloc_stackframe();
3082         NTSTATUS status;
3083
3084         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3085                                 &num_streams, &stream_info);
3086
3087         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3088             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3089                 DEBUG(10, ("no streams around\n"));
3090                 TALLOC_FREE(frame);
3091                 return NT_STATUS_OK;
3092         }
3093
3094         if (!NT_STATUS_IS_OK(status)) {
3095                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3096                            nt_errstr(status)));
3097                 goto fail;
3098         }
3099
3100         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3101                    num_streams));
3102
3103         if (num_streams == 0) {
3104                 TALLOC_FREE(frame);
3105                 return NT_STATUS_OK;
3106         }
3107
3108         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3109         if (streams == NULL) {
3110                 DEBUG(0, ("talloc failed\n"));
3111                 status = NT_STATUS_NO_MEMORY;
3112                 goto fail;
3113         }
3114
3115         for (i=0; i<num_streams; i++) {
3116                 struct smb_filename *smb_fname = NULL;
3117
3118                 if (strequal(stream_info[i].name, "::$DATA")) {
3119                         streams[i] = NULL;
3120                         continue;
3121                 }
3122
3123                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3124                                                     stream_info[i].name,
3125                                                     NULL, &smb_fname);
3126                 if (!NT_STATUS_IS_OK(status)) {
3127                         goto fail;
3128                 }
3129
3130                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3131                         DEBUG(10, ("Unable to stat stream: %s\n",
3132                                    smb_fname_str_dbg(smb_fname)));
3133                 }
3134
3135                 status = SMB_VFS_CREATE_FILE(
3136                          conn,                  /* conn */
3137                          NULL,                  /* req */
3138                          0,                     /* root_dir_fid */
3139                          smb_fname,             /* fname */
3140                          DELETE_ACCESS,         /* access_mask */
3141                          (FILE_SHARE_READ |     /* share_access */
3142                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3143                          FILE_OPEN,             /* create_disposition*/
3144                          0,                     /* create_options */
3145                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3146                          0,                     /* oplock_request */
3147                          0,                     /* allocation_size */
3148                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3149                          NULL,                  /* sd */
3150                          NULL,                  /* ea_list */
3151                          &streams[i],           /* result */
3152                          NULL);                 /* pinfo */
3153
3154                 if (!NT_STATUS_IS_OK(status)) {
3155                         DEBUG(10, ("Could not open stream %s: %s\n",
3156                                    smb_fname_str_dbg(smb_fname),
3157                                    nt_errstr(status)));
3158
3159                         TALLOC_FREE(smb_fname);
3160                         break;
3161                 }
3162                 TALLOC_FREE(smb_fname);
3163         }
3164
3165         /*
3166          * don't touch the variable "status" beyond this point :-)
3167          */
3168
3169         for (i -= 1 ; i >= 0; i--) {
3170                 if (streams[i] == NULL) {
3171                         continue;
3172                 }
3173
3174                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3175                            fsp_str_dbg(streams[i])));
3176                 close_file(NULL, streams[i], NORMAL_CLOSE);
3177         }
3178
3179  fail:
3180         TALLOC_FREE(frame);
3181         return status;
3182 }
3183
3184 /*********************************************************************
3185  Create a default ACL by inheriting from the parent. If no inheritance
3186  from the parent available, don't set anything. This will leave the actual
3187  permissions the new file or directory already got from the filesystem
3188  as the NT ACL when read.
3189 *********************************************************************/
3190
3191 static NTSTATUS inherit_new_acl(files_struct *fsp)
3192 {
3193         TALLOC_CTX *ctx = talloc_tos();
3194         char *parent_name = NULL;
3195         struct security_descriptor *parent_desc = NULL;
3196         NTSTATUS status = NT_STATUS_OK;
3197         struct security_descriptor *psd = NULL;
3198         struct dom_sid *owner_sid = NULL;
3199         struct dom_sid *group_sid = NULL;
3200         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3201         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3202         bool inheritable_components = false;
3203         size_t size = 0;
3204
3205         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3206                 return NT_STATUS_NO_MEMORY;
3207         }
3208
3209         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3210                                 parent_name,
3211                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3212                                 &parent_desc);
3213         if (!NT_STATUS_IS_OK(status)) {
3214                 return status;
3215         }
3216
3217         inheritable_components = sd_has_inheritable_components(parent_desc,
3218                                         fsp->is_directory);
3219
3220         if (!inheritable_components && !inherit_owner) {
3221                 /* Nothing to inherit and not setting owner. */
3222                 return NT_STATUS_OK;
3223         }
3224
3225         /* Create an inherited descriptor from the parent. */
3226
3227         if (DEBUGLEVEL >= 10) {
3228                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3229                         fsp_str_dbg(fsp) ));
3230                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3231         }
3232
3233         /* Inherit from parent descriptor if "inherit owner" set. */
3234         if (inherit_owner) {
3235                 owner_sid = parent_desc->owner_sid;
3236                 group_sid = parent_desc->group_sid;
3237         }
3238
3239         if (owner_sid == NULL) {
3240                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3241         }
3242         if (group_sid == NULL) {
3243                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3244         }
3245
3246         status = se_create_child_secdesc(ctx,
3247                         &psd,
3248                         &size,
3249                         parent_desc,
3250                         owner_sid,
3251                         group_sid,
3252                         fsp->is_directory);
3253         if (!NT_STATUS_IS_OK(status)) {
3254                 return status;
3255         }
3256
3257         /* If inheritable_components == false,
3258            se_create_child_secdesc()
3259            creates a security desriptor with a NULL dacl
3260            entry, but with SEC_DESC_DACL_PRESENT. We need
3261            to remove that flag. */
3262
3263         if (!inheritable_components) {
3264                 security_info_sent &= ~SECINFO_DACL;
3265                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3266         }
3267
3268         if (DEBUGLEVEL >= 10) {
3269                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3270                         fsp_str_dbg(fsp) ));
3271                 NDR_PRINT_DEBUG(security_descriptor, psd);
3272         }
3273
3274         if (inherit_owner) {
3275                 /* We need to be root to force this. */
3276                 become_root();
3277         }
3278         status = SMB_VFS_FSET_NT_ACL(fsp,
3279                         security_info_sent,
3280                         psd);
3281         if (inherit_owner) {
3282                 unbecome_root();
3283         }
3284         return status;
3285 }
3286
3287 /*
3288  * Wrapper around open_file_ntcreate and open_directory
3289  */
3290
3291 static NTSTATUS create_file_unixpath(connection_struct *conn,
3292                                      struct smb_request *req,
3293                                      struct smb_filename *smb_fname,
3294                                      uint32_t access_mask,
3295                                      uint32_t share_access,
3296                                      uint32_t create_disposition,
3297                                      uint32_t create_options,
3298                                      uint32_t file_attributes,
3299                                      uint32_t oplock_request,
3300                                      uint64_t allocation_size,
3301                                      uint32_t private_flags,
3302                                      struct security_descriptor *sd,
3303                                      struct ea_list *ea_list,
3304
3305                                      files_struct **result,
3306                                      int *pinfo)
3307 {
3308         int info = FILE_WAS_OPENED;
3309         files_struct *base_fsp = NULL;
3310         files_struct *fsp = NULL;
3311         NTSTATUS status;
3312
3313         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3314                   "file_attributes = 0x%x, share_access = 0x%x, "
3315                   "create_disposition = 0x%x create_options = 0x%x "
3316                   "oplock_request = 0x%x private_flags = 0x%x "
3317                   "ea_list = 0x%p, sd = 0x%p, "
3318                   "fname = %s\n",
3319                   (unsigned int)access_mask,
3320                   (unsigned int)file_attributes,
3321                   (unsigned int)share_access,
3322                   (unsigned int)create_disposition,
3323                   (unsigned int)create_options,
3324                   (unsigned int)oplock_request,
3325                   (unsigned int)private_flags,
3326                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3327
3328         if (create_options & FILE_OPEN_BY_FILE_ID) {
3329                 status = NT_STATUS_NOT_SUPPORTED;
3330                 goto fail;
3331         }
3332
3333         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3334                 status = NT_STATUS_INVALID_PARAMETER;
3335                 goto fail;
3336         }
3337
3338         if (req == NULL) {
3339                 oplock_request |= INTERNAL_OPEN_ONLY;
3340         }
3341
3342         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3343             && (access_mask & DELETE_ACCESS)
3344             && !is_ntfs_stream_smb_fname(smb_fname)) {
3345                 /*
3346                  * We can't open a file with DELETE access if any of the
3347                  * streams is open without FILE_SHARE_DELETE
3348                  */
3349                 status = open_streams_for_delete(conn, smb_fname->base_name);
3350
3351                 if (!NT_STATUS_IS_OK(status)) {
3352                         goto fail;
3353                 }
3354         }
3355
3356         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3357                         !security_token_has_privilege(get_current_nttok(conn),
3358                                         SEC_PRIV_SECURITY)) {
3359                 DEBUG(10, ("create_file_unixpath: open on %s "
3360                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3361                         smb_fname_str_dbg(smb_fname)));
3362                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3363                 goto fail;
3364         }
3365
3366         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3367             && is_ntfs_stream_smb_fname(smb_fname)
3368             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3369                 uint32 base_create_disposition;
3370                 struct smb_filename *smb_fname_base = NULL;
3371
3372                 if (create_options & FILE_DIRECTORY_FILE) {
3373                         status = NT_STATUS_NOT_A_DIRECTORY;
3374                         goto fail;
3375                 }
3376
3377                 switch (create_disposition) {
3378                 case FILE_OPEN:
3379                         base_create_disposition = FILE_OPEN;
3380                         break;
3381                 default:
3382                         base_create_disposition = FILE_OPEN_IF;
3383                         break;
3384                 }
3385
3386                 /* Create an smb_filename with stream_name == NULL. */
3387                 status = create_synthetic_smb_fname(talloc_tos(),
3388                                                     smb_fname->base_name,
3389                                                     NULL, NULL,
3390                                                     &smb_fname_base);
3391                 if (!NT_STATUS_IS_OK(status)) {
3392                         goto fail;
3393                 }
3394
3395                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3396                         DEBUG(10, ("Unable to stat stream: %s\n",
3397                                    smb_fname_str_dbg(smb_fname_base)));
3398                 }
3399
3400                 /* Open the base file. */
3401                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3402                                               FILE_SHARE_READ
3403                                               | FILE_SHARE_WRITE
3404                                               | FILE_SHARE_DELETE,
3405                                               base_create_disposition,
3406                                               0, 0, 0, 0, 0, NULL, NULL,
3407                                               &base_fsp, NULL);
3408                 TALLOC_FREE(smb_fname_base);
3409
3410                 if (!NT_STATUS_IS_OK(status)) {
3411                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3412                                    "%s\n", smb_fname->base_name,
3413                                    nt_errstr(status)));
3414                         goto fail;
3415                 }
3416                 /* we don't need to low level fd */
3417                 fd_close(base_fsp);
3418         }
3419
3420         /*
3421          * If it's a request for a directory open, deal with it separately.
3422          */
3423
3424         if (create_options & FILE_DIRECTORY_FILE) {
3425
3426                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3427                         status = NT_STATUS_INVALID_PARAMETER;
3428                         goto fail;
3429                 }
3430
3431                 /* Can't open a temp directory. IFS kit test. */
3432                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3433                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3434                         status = NT_STATUS_INVALID_PARAMETER;
3435                         goto fail;
3436                 }
3437
3438                 /*
3439                  * We will get a create directory here if the Win32
3440                  * app specified a security descriptor in the
3441                  * CreateDirectory() call.
3442                  */
3443
3444                 oplock_request = 0;
3445                 status = open_directory(
3446                         conn, req, smb_fname, access_mask, share_access,
3447                         create_disposition, create_options, file_attributes,
3448                         &info, &fsp);
3449         } else {
3450
3451                 /*
3452                  * Ordinary file case.
3453                  */
3454
3455                 status = file_new(req, conn, &fsp);
3456                 if(!NT_STATUS_IS_OK(status)) {
3457                         goto fail;
3458                 }
3459
3460                 status = fsp_set_smb_fname(fsp, smb_fname);
3461                 if (!NT_STATUS_IS_OK(status)) {
3462                         goto fail;
3463                 }
3464
3465                 /*
3466                  * We're opening the stream element of a base_fsp
3467                  * we already opened. Set up the base_fsp pointer.
3468                  */
3469                 if (base_fsp) {
3470                         fsp->base_fsp = base_fsp;
3471                 }
3472
3473                 status = open_file_ntcreate(conn,
3474                                             req,
3475                                             access_mask,
3476                                             share_access,
3477                                             create_disposition,
3478                                             create_options,
3479                                             file_attributes,
3480                                             oplock_request,
3481                                             private_flags,
3482                                             &info,
3483                                             fsp);
3484
3485                 if(!NT_STATUS_IS_OK(status)) {
3486                         file_free(req, fsp);
3487                         fsp = NULL;
3488                 }
3489
3490                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3491
3492                         /* A stream open never opens a directory */
3493
3494                         if (base_fsp) {
3495                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3496                                 goto fail;
3497                         }
3498
3499                         /*
3500                          * Fail the open if it was explicitly a non-directory
3501                          * file.
3502                          */
3503
3504                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3505                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3506                                 goto fail;
3507                         }
3508
3509                         oplock_request = 0;
3510                         status = open_directory(
3511                                 conn, req, smb_fname, access_mask,
3512                                 share_access, create_disposition,
3513                                 create_options, file_attributes,
3514                                 &info, &fsp);
3515                 }
3516         }
3517
3518         if (!NT_STATUS_IS_OK(status)) {
3519                 goto fail;
3520         }
3521
3522         fsp->base_fsp = base_fsp;
3523
3524         if ((ea_list != NULL) &&
3525             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3526                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3527                 if (!NT_STATUS_IS_OK(status)) {
3528                         goto fail;
3529                 }
3530         }
3531
3532         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3533                 status = NT_STATUS_ACCESS_DENIED;
3534                 goto fail;
3535         }
3536
3537         /* Save the requested allocation size. */
3538         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3539                 if (allocation_size
3540                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3541                         fsp->initial_allocation_size = smb_roundup(
3542                                 fsp->conn, allocation_size);
3543                         if (fsp->is_directory) {
3544                                 /* Can't set allocation size on a directory. */
3545                                 status = NT_STATUS_ACCESS_DENIED;
3546                                 goto fail;
3547                         }
3548                         if (vfs_allocate_file_space(
3549                                     fsp, fsp->initial_allocation_size) == -1) {
3550                                 status = NT_STATUS_DISK_FULL;
3551                                 goto fail;
3552                         }
3553                 } else {
3554                         fsp->initial_allocation_size = smb_roundup(
3555                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3556                 }
3557         }
3558
3559         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3560                                 fsp->base_fsp == NULL) {
3561                 if (sd != NULL) {
3562                         /*
3563                          * According to the MS documentation, the only time the security
3564                          * descriptor is applied to the opened file is iff we *created* the
3565                          * file; an existing file stays the same.
3566                          *
3567                          * Also, it seems (from observation) that you can open the file with
3568                          * any access mask but you can still write the sd. We need to override
3569                          * the granted access before we call set_sd
3570                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3571                          */
3572
3573                         uint32_t sec_info_sent;
3574                         uint32_t saved_access_mask = fsp->access_mask;
3575
3576                         sec_info_sent = get_sec_info(sd);
3577
3578                         fsp->access_mask = FILE_GENERIC_ALL;
3579
3580                         /* Convert all the generic bits. */
3581                         security_acl_map_generic(sd->dacl, &file_generic_mapping);
3582                         security_acl_map_generic(sd->sacl, &file_generic_mapping);
3583
3584                         if (sec_info_sent & (SECINFO_OWNER|
3585                                                 SECINFO_GROUP|
3586                                                 SECINFO_DACL|
3587                                                 SECINFO_SACL)) {
3588                                 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3589                         }
3590
3591                         fsp->access_mask = saved_access_mask;
3592
3593                         if (!NT_STATUS_IS_OK(status)) {
3594                                 goto fail;
3595                         }
3596                 } else if (lp_inherit_acls(SNUM(conn))) {
3597                         /* Inherit from parent. Errors here are not fatal. */
3598                         status = inherit_new_acl(fsp);
3599                         if (!NT_STATUS_IS_OK(status)) {
3600                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3601                                         fsp_str_dbg(fsp),
3602                                         nt_errstr(status) ));
3603                         }
3604                 }
3605         }
3606
3607         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3608
3609         *result = fsp;
3610         if (pinfo != NULL) {
3611                 *pinfo = info;
3612         }
3613
3614         smb_fname->st = fsp->fsp_name->st;
3615
3616         return NT_STATUS_OK;
3617
3618  fail:
3619         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3620
3621         if (fsp != NULL) {
3622                 if (base_fsp && fsp->base_fsp == base_fsp) {
3623                         /*
3624                          * The close_file below will close
3625                          * fsp->base_fsp.
3626                          */
3627                         base_fsp = NULL;
3628                 }
3629                 close_file(req, fsp, ERROR_CLOSE);
3630                 fsp = NULL;
3631         }
3632         if (base_fsp != NULL) {
3633                 close_file(req, base_fsp, ERROR_CLOSE);
3634                 base_fsp = NULL;
3635         }
3636         return status;
3637 }
3638
3639 /*
3640  * Calculate the full path name given a relative fid.
3641  */
3642 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3643                                    struct smb_request *req,
3644                                    uint16_t root_dir_fid,
3645                                    const struct smb_filename *smb_fname,
3646                                    struct smb_filename **smb_fname_out)
3647 {
3648         files_struct *dir_fsp;
3649         char *parent_fname = NULL;
3650         char *new_base_name = NULL;
3651         NTSTATUS status;
3652
3653         if (root_dir_fid == 0 || !smb_fname) {
3654                 status = NT_STATUS_INTERNAL_ERROR;
3655                 goto out;
3656         }
3657
3658         dir_fsp = file_fsp(req, root_dir_fid);
3659
3660         if (dir_fsp == NULL) {
3661                 status = NT_STATUS_INVALID_HANDLE;
3662                 goto out;
3663         }
3664
3665         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3666                 status = NT_STATUS_INVALID_HANDLE;
3667                 goto out;
3668         }
3669
3670         if (!dir_fsp->is_directory) {
3671
3672                 /*
3673                  * Check to see if this is a mac fork of some kind.
3674                  */
3675
3676                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3677                     is_ntfs_stream_smb_fname(smb_fname)) {
3678                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3679                         goto out;
3680                 }
3681
3682                 /*
3683                   we need to handle the case when we get a
3684                   relative open relative to a file and the
3685                   pathname is blank - this is a reopen!
3686                   (hint from demyn plantenberg)
3687                 */
3688
3689                 status = NT_STATUS_INVALID_HANDLE;
3690                 goto out;
3691         }
3692
3693         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3694                 /*
3695                  * We're at the toplevel dir, the final file name
3696                  * must not contain ./, as this is filtered out
3697                  * normally by srvstr_get_path and unix_convert
3698                  * explicitly rejects paths containing ./.
3699                  */
3700                 parent_fname = talloc_strdup(talloc_tos(), "");
3701                 if (parent_fname == NULL) {
3702                         status = NT_STATUS_NO_MEMORY;
3703                         goto out;
3704                 }
3705         } else {
3706                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3707
3708                 /*
3709                  * Copy in the base directory name.
3710                  */
3711
3712                 parent_fname = talloc_array(talloc_tos(), char,
3713                     dir_name_len+2);
3714                 if (parent_fname == NULL) {
3715                         status = NT_STATUS_NO_MEMORY;
3716                         goto out;
3717                 }
3718                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3719                     dir_name_len+1);
3720
3721                 /*
3722                  * Ensure it ends in a '/'.
3723                  * We used TALLOC_SIZE +2 to add space for the '/'.
3724                  */
3725
3726                 if(dir_name_len
3727                     && (parent_fname[dir_name_len-1] != '\\')
3728                     && (parent_fname[dir_name_len-1] != '/')) {
3729                         parent_fname[dir_name_len] = '/';
3730                         parent_fname[dir_name_len+1] = '\0';
3731                 }
3732         }
3733
3734         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3735                                         smb_fname->base_name);
3736         if (new_base_name == NULL) {
3737                 status = NT_STATUS_NO_MEMORY;
3738                 goto out;
3739         }
3740
3741         status = filename_convert(req,
3742                                 conn,
3743                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3744                                 new_base_name,
3745                                 0,
3746                                 NULL,
3747                                 smb_fname_out);
3748         if (!NT_STATUS_IS_OK(status)) {
3749                 goto out;
3750         }
3751
3752  out:
3753         TALLOC_FREE(parent_fname);
3754         TALLOC_FREE(new_base_name);
3755         return status;
3756 }
3757
3758 NTSTATUS create_file_default(connection_struct *conn,
3759                              struct smb_request *req,
3760                              uint16_t root_dir_fid,
3761                              struct smb_filename *smb_fname,
3762                              uint32_t access_mask,
3763                              uint32_t share_access,
3764                              uint32_t create_disposition,
3765                              uint32_t create_options,
3766                              uint32_t file_attributes,
3767                              uint32_t oplock_request,
3768                              uint64_t allocation_size,
3769                              uint32_t private_flags,
3770                              struct security_descriptor *sd,
3771                              struct ea_list *ea_list,
3772                              files_struct **result,
3773                              int *pinfo)
3774 {
3775         int info = FILE_WAS_OPENED;
3776         files_struct *fsp = NULL;
3777         NTSTATUS status;
3778         bool stream_name = false;
3779
3780         DEBUG(10,("create_file: access_mask = 0x%x "
3781                   "file_attributes = 0x%x, share_access = 0x%x, "
3782                   "create_disposition = 0x%x create_options = 0x%x "
3783                   "oplock_request = 0x%x "
3784                   "private_flags = 0x%x "
3785                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3786                   "fname = %s\n",
3787                   (unsigned int)access_mask,
3788                   (unsigned int)file_attributes,
3789                   (unsigned int)share_access,
3790                   (unsigned int)create_disposition,
3791                   (unsigned int)create_options,
3792                   (unsigned int)oplock_request,
3793                   (unsigned int)private_flags,
3794                   (unsigned int)root_dir_fid,
3795                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3796
3797         /*
3798          * Calculate the filename from the root_dir_if if necessary.
3799          */
3800
3801         if (root_dir_fid != 0) {
3802                 struct smb_filename *smb_fname_out = NULL;
3803                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3804                                                    smb_fname, &smb_fname_out);
3805                 if (!NT_STATUS_IS_OK(status)) {
3806                         goto fail;
3807                 }
3808                 smb_fname = smb_fname_out;
3809         }
3810
3811         /*
3812          * Check to see if this is a mac fork of some kind.
3813          */
3814
3815         stream_name = is_ntfs_stream_smb_fname(smb_fname);
3816         if (stream_name) {
3817                 enum FAKE_FILE_TYPE fake_file_type;
3818
3819                 fake_file_type = is_fake_file(smb_fname);
3820
3821                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3822
3823                         /*
3824                          * Here we go! support for changing the disk quotas
3825                          * --metze
3826                          *
3827                          * We need to fake up to open this MAGIC QUOTA file
3828                          * and return a valid FID.
3829                          *
3830                          * w2k close this file directly after openening xp
3831                          * also tries a QUERY_FILE_INFO on the file and then
3832                          * close it
3833                          */
3834                         status = open_fake_file(req, conn, req->vuid,
3835                                                 fake_file_type, smb_fname,
3836                                                 access_mask, &fsp);
3837                         if (!NT_STATUS_IS_OK(status)) {
3838                                 goto fail;
3839                         }
3840
3841                         ZERO_STRUCT(smb_fname->st);
3842                         goto done;
3843                 }
3844
3845                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3846                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3847                         goto fail;
3848                 }
3849         }
3850
3851         /* All file access must go through check_name() */
3852
3853         status = check_name(conn, smb_fname->base_name);
3854         if (!NT_STATUS_IS_OK(status)) {
3855                 goto fail;
3856         }
3857
3858         if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3859                 int ret;
3860                 smb_fname->stream_name = NULL;
3861                 /* We have to handle this error here. */
3862                 if (create_options & FILE_DIRECTORY_FILE) {
3863                         status = NT_STATUS_NOT_A_DIRECTORY;
3864                         goto fail;
3865                 }
3866                 if (lp_posix_pathnames()) {
3867                         ret = SMB_VFS_LSTAT(conn, smb_fname);
3868                 } else {
3869                         ret = SMB_VFS_STAT(conn, smb_fname);
3870                 }
3871
3872                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3873                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
3874                         goto fail;
3875                 }
3876         }
3877
3878         status = create_file_unixpath(
3879                 conn, req, smb_fname, access_mask, share_access,
3880                 create_disposition, create_options, file_attributes,
3881                 oplock_request, allocation_size, private_flags,
3882                 sd, ea_list,
3883                 &fsp, &info);
3884
3885         if (!NT_STATUS_IS_OK(status)) {
3886                 goto fail;
3887         }
3888
3889  done:
3890         DEBUG(10, ("create_file: info=%d\n", info));
3891
3892         *result = fsp;
3893         if (pinfo != NULL) {
3894                 *pinfo = info;
3895         }
3896         return NT_STATUS_OK;
3897
3898  fail:
3899         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3900
3901         if (fsp != NULL) {
3902                 close_file(req, fsp, ERROR_CLOSE);
3903                 fsp = NULL;
3904         }
3905         return status;
3906 }