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 "../librpc/gen_ndr/idmap.h"
  32 #include "../librpc/gen_ndr/ioctl.h"
  33 #include "passdb/lookup_sid.h"
  34 #include "auth.h"
  35 #include "serverid.h"
  36 #include "messages.h"
  37 #include "source3/lib/dbwrap/dbwrap_watch.h"
  38 #include "locking/leases_db.h"
  39 #include "librpc/gen_ndr/ndr_leases_db.h"
  40
  41 extern const struct generic_mapping file_generic_mapping;
  42
  43 struct deferred_open_record {
  44         bool delayed_for_oplocks;
  45         bool async_open;
  46         struct file_id id;
  47 };
  48
  49 /****************************************************************************
  50  If the requester wanted DELETE_ACCESS and was rejected because
  51  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  52  overrides this.
  53 ****************************************************************************/
  54
  55 static bool parent_override_delete(connection_struct *conn,
  56                                         const struct smb_filename *smb_fname,
  57                                         uint32_t access_mask,
  58                                         uint32_t rejected_mask)
  59 {
  60         if ((access_mask & DELETE_ACCESS) &&
  61                     (rejected_mask & DELETE_ACCESS) &&
  62                     can_delete_file_in_directory(conn, smb_fname)) {
  63                 return true;
  64         }
  65         return false;
  66 }
  67
  68 /****************************************************************************
  69  Check if we have open rights.
  70 ****************************************************************************/
  71
  72 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  73                                 const struct smb_filename *smb_fname,
  74                                 bool use_privs,
  75                                 uint32_t access_mask)
  76 {
  77         /* Check if we have rights to open. */
  78         NTSTATUS status;
  79         struct security_descriptor *sd = NULL;
  80         uint32_t rejected_share_access;
  81         uint32_t rejected_mask = access_mask;
  82         uint32_t do_not_check_mask = 0;
  83
  84         rejected_share_access = access_mask & ~(conn->share_access);
  85
  86         if (rejected_share_access) {
  87                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  88                         "on %s (0x%x)\n",
  89                         (unsigned int)access_mask,
  90                         smb_fname_str_dbg(smb_fname),
  91                         (unsigned int)rejected_share_access ));
  92                 return NT_STATUS_ACCESS_DENIED;
  93         }
  94
  95         if (!use_privs && get_current_uid(conn) == (uid_t)0) {
  96                 /* I'm sorry sir, I didn't know you were root... */
  97                 DEBUG(10,("smbd_check_access_rights: root override "
  98                         "on %s. Granting 0x%x\n",
  99                         smb_fname_str_dbg(smb_fname),
 100                         (unsigned int)access_mask ));
 101                 return NT_STATUS_OK;
 102         }
 103
 104         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
 105                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 106                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
 107                         smb_fname_str_dbg(smb_fname),
 108                         (unsigned int)access_mask ));
 109                 return NT_STATUS_OK;
 110         }
 111
 112         if (access_mask == DELETE_ACCESS &&
 113                         VALID_STAT(smb_fname->st) &&
 114                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 115                 /* We can always delete a symlink. */
 116                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 117                         "on DELETE_ACCESS on symlink %s.\n",
 118                         smb_fname_str_dbg(smb_fname) ));
 119                 return NT_STATUS_OK;
 120         }
 121
 122         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 123                         (SECINFO_OWNER |
 124                         SECINFO_GROUP |
 125                          SECINFO_DACL), talloc_tos(), &sd);
 126
 127         if (!NT_STATUS_IS_OK(status)) {
 128                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 129                         "on %s: %s\n",
 130                         smb_fname_str_dbg(smb_fname),
 131                         nt_errstr(status)));
 132
 133                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 134                         goto access_denied;
 135                 }
 136
 137                 return status;
 138         }
 139
 140         /*
 141          * If we can access the path to this file, by
 142          * default we have FILE_READ_ATTRIBUTES from the
 143          * containing directory. See the section:
 144          * "Algorithm to Check Access to an Existing File"
 145          * in MS-FSA.pdf.
 146          *
 147          * se_file_access_check() also takes care of
 148          * owner WRITE_DAC and READ_CONTROL.
 149          */
 150         do_not_check_mask = FILE_READ_ATTRIBUTES;
 151
 152         /*
 153          * Samba 3.6 and earlier granted execute access even
 154          * if the ACL did not contain execute rights.
 155          * Samba 4.0 is more correct and checks it.
 156          * The compatibilty mode allows one to skip this check
 157          * to smoothen upgrades.
 158          */
 159         if (lp_acl_allow_execute_always(SNUM(conn))) {
 160                 do_not_check_mask |= FILE_EXECUTE;
 161         }
 162
 163         status = se_file_access_check(sd,
 164                                 get_current_nttok(conn),
 165                                 use_privs,
 166                                 (access_mask & ~do_not_check_mask),
 167                                 &rejected_mask);
 168
 169         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 170                 "0x%x returning 0x%x (%s)\n",
 171                 smb_fname_str_dbg(smb_fname),
 172                 (unsigned int)access_mask,
 173                 (unsigned int)rejected_mask,
 174                 nt_errstr(status) ));
 175
 176         if (!NT_STATUS_IS_OK(status)) {
 177                 if (DEBUGLEVEL >= 10) {
 178                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 179                                 smb_fname_str_dbg(smb_fname) ));
 180                         NDR_PRINT_DEBUG(security_descriptor, sd);
 181                 }
 182         }
 183
 184         TALLOC_FREE(sd);
 185
 186         if (NT_STATUS_IS_OK(status) ||
 187                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 188                 return status;
 189         }
 190
 191         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 192
 193   access_denied:
 194
 195         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 196                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 197                         !lp_store_dos_attributes(SNUM(conn)) &&
 198                         (lp_map_readonly(SNUM(conn)) ||
 199                         lp_map_archive(SNUM(conn)) ||
 200                         lp_map_hidden(SNUM(conn)) ||
 201                         lp_map_system(SNUM(conn)))) {
 202                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 203
 204                 DEBUG(10,("smbd_check_access_rights: "
 205                         "overrode "
 206                         "FILE_WRITE_ATTRIBUTES "
 207                         "on file %s\n",
 208                         smb_fname_str_dbg(smb_fname)));
 209         }
 210
 211         if (parent_override_delete(conn,
 212                                 smb_fname,
 213                                 access_mask,
 214                                 rejected_mask)) {
 215                 /* Were we trying to do an open
 216                  * for delete and didn't get DELETE
 217                  * access (only) ? Check if the
 218                  * directory allows DELETE_CHILD.
 219                  * See here:
 220                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 221                  * for details. */
 222
 223                 rejected_mask &= ~DELETE_ACCESS;
 224
 225                 DEBUG(10,("smbd_check_access_rights: "
 226                         "overrode "
 227                         "DELETE_ACCESS on "
 228                         "file %s\n",
 229                         smb_fname_str_dbg(smb_fname)));
 230         }
 231
 232         if (rejected_mask != 0) {
 233                 return NT_STATUS_ACCESS_DENIED;
 234         }
 235         return NT_STATUS_OK;
 236 }
 237
 238 static NTSTATUS check_parent_access(struct connection_struct *conn,
 239                                 struct smb_filename *smb_fname,
 240                                 uint32_t access_mask)
 241 {
 242         NTSTATUS status;
 243         char *parent_dir = NULL;
 244         struct security_descriptor *parent_sd = NULL;
 245         uint32_t access_granted = 0;
 246
 247         if (!parent_dirname(talloc_tos(),
 248                                 smb_fname->base_name,
 249                                 &parent_dir,
 250                                 NULL)) {
 251                 return NT_STATUS_NO_MEMORY;
 252         }
 253
 254         if (get_current_uid(conn) == (uid_t)0) {
 255                 /* I'm sorry sir, I didn't know you were root... */
 256                 DEBUG(10,("check_parent_access: root override "
 257                         "on %s. Granting 0x%x\n",
 258                         smb_fname_str_dbg(smb_fname),
 259                         (unsigned int)access_mask ));
 260                 return NT_STATUS_OK;
 261         }
 262
 263         status = SMB_VFS_GET_NT_ACL(conn,
 264                                 parent_dir,
 265                                 SECINFO_DACL,
 266                                     talloc_tos(),
 267                                 &parent_sd);
 268
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 271                         "%s with error %s\n",
 272                         parent_dir,
 273                         nt_errstr(status)));
 274                 return status;
 275         }
 276
 277         /*
 278          * If we can access the path to this file, by
 279          * default we have FILE_READ_ATTRIBUTES from the
 280          * containing directory. See the section:
 281          * "Algorithm to Check Access to an Existing File"
 282          * in MS-FSA.pdf.
 283          *
 284          * se_file_access_check() also takes care of
 285          * owner WRITE_DAC and READ_CONTROL.
 286          */
 287         status = se_file_access_check(parent_sd,
 288                                 get_current_nttok(conn),
 289                                 false,
 290                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 291                                 &access_granted);
 292         if(!NT_STATUS_IS_OK(status)) {
 293                 DEBUG(5,("check_parent_access: access check "
 294                         "on directory %s for "
 295                         "path %s for mask 0x%x returned (0x%x) %s\n",
 296                         parent_dir,
 297                         smb_fname->base_name,
 298                         access_mask,
 299                         access_granted,
 300                         nt_errstr(status) ));
 301                 return status;
 302         }
 303
 304         return NT_STATUS_OK;
 305 }
 306
 307 /****************************************************************************
 308  Ensure when opening a base file for a stream open that we have permissions
 309  to do so given the access mask on the base file.
 310 ****************************************************************************/
 311
 312 static NTSTATUS check_base_file_access(struct connection_struct *conn,
 313                                 struct smb_filename *smb_fname,
 314                                 uint32_t access_mask)
 315 {
 316         NTSTATUS status;
 317
 318         status = smbd_calculate_access_mask(conn, smb_fname,
 319                                         false,
 320                                         access_mask,
 321                                         &access_mask);
 322         if (!NT_STATUS_IS_OK(status)) {
 323                 DEBUG(10, ("smbd_calculate_access_mask "
 324                         "on file %s returned %s\n",
 325                         smb_fname_str_dbg(smb_fname),
 326                         nt_errstr(status)));
 327                 return status;
 328         }
 329
 330         if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
 331                 uint32_t dosattrs;
 332                 if (!CAN_WRITE(conn)) {
 333                         return NT_STATUS_ACCESS_DENIED;
 334                 }
 335                 dosattrs = dos_mode(conn, smb_fname);
 336                 if (IS_DOS_READONLY(dosattrs)) {
 337                         return NT_STATUS_ACCESS_DENIED;
 338                 }
 339         }
 340
 341         return smbd_check_access_rights(conn,
 342                                         smb_fname,
 343                                         false,
 344                                         access_mask);
 345 }
 346
 347 /****************************************************************************
 348  fd support routines - attempt to do a dos_open.
 349 ****************************************************************************/
 350
 351 NTSTATUS fd_open(struct connection_struct *conn,
 352                  files_struct *fsp,
 353                  int flags,
 354                  mode_t mode)
 355 {
 356         struct smb_filename *smb_fname = fsp->fsp_name;
 357         NTSTATUS status = NT_STATUS_OK;
 358
 359 #ifdef O_NOFOLLOW
 360         /*
 361          * Never follow symlinks on a POSIX client. The
 362          * client should be doing this.
 363          */
 364
 365         if (fsp->posix_open || !lp_follow_symlinks(SNUM(conn))) {
 366                 flags |= O_NOFOLLOW;
 367         }
 368 #endif
 369
 370         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 371         if (fsp->fh->fd == -1) {
 372                 int posix_errno = errno;
 373 #ifdef O_NOFOLLOW
 374 #if defined(ENOTSUP) && defined(OSF1)
 375                 /* handle special Tru64 errno */
 376                 if (errno == ENOTSUP) {
 377                         posix_errno = ELOOP;
 378                 }
 379 #endif /* ENOTSUP */
 380 #ifdef EFTYPE
 381                 /* fix broken NetBSD errno */
 382                 if (errno == EFTYPE) {
 383                         posix_errno = ELOOP;
 384                 }
 385 #endif /* EFTYPE */
 386                 /* fix broken FreeBSD errno */
 387                 if (errno == EMLINK) {
 388                         posix_errno = ELOOP;
 389                 }
 390 #endif /* O_NOFOLLOW */
 391                 status = map_nt_error_from_unix(posix_errno);
 392                 if (errno == EMFILE) {
 393                         static time_t last_warned = 0L;
 394
 395                         if (time((time_t *) NULL) > last_warned) {
 396                                 DEBUG(0,("Too many open files, unable "
 397                                         "to open more!  smbd's max "
 398                                         "open files = %d\n",
 399                                         lp_max_open_files()));
 400                                 last_warned = time((time_t *) NULL);
 401                         }
 402                 }
 403
 404         }
 405
 406         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 407                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 408                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 409
 410         return status;
 411 }
 412
 413 /****************************************************************************
 414  Close the file associated with a fsp.
 415 ****************************************************************************/
 416
 417 NTSTATUS fd_close(files_struct *fsp)
 418 {
 419         int ret;
 420
 421         if (fsp->dptr) {
 422                 dptr_CloseDir(fsp);
 423         }
 424         if (fsp->fh->fd == -1) {
 425                 return NT_STATUS_OK; /* What we used to call a stat open. */
 426         }
 427         if (fsp->fh->ref_count > 1) {
 428                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 429         }
 430
 431         ret = SMB_VFS_CLOSE(fsp);
 432         fsp->fh->fd = -1;
 433         if (ret == -1) {
 434                 return map_nt_error_from_unix(errno);
 435         }
 436         return NT_STATUS_OK;
 437 }
 438
 439 /****************************************************************************
 440  Change the ownership of a file to that of the parent directory.
 441  Do this by fd if possible.
 442 ****************************************************************************/
 443
 444 void change_file_owner_to_parent(connection_struct *conn,
 445                                         const char *inherit_from_dir,
 446                                         files_struct *fsp)
 447 {
 448         struct smb_filename *smb_fname_parent;
 449         int ret;
 450
 451         smb_fname_parent = synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 452                                                NULL, NULL);
 453         if (smb_fname_parent == NULL) {
 454                 return;
 455         }
 456
 457         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 458         if (ret == -1) {
 459                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 460                          "directory %s. Error was %s\n",
 461                          smb_fname_str_dbg(smb_fname_parent),
 462                          strerror(errno)));
 463                 TALLOC_FREE(smb_fname_parent);
 464                 return;
 465         }
 466
 467         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 468                 /* Already this uid - no need to change. */
 469                 DEBUG(10,("change_file_owner_to_parent: file %s "
 470                         "is already owned by uid %d\n",
 471                         fsp_str_dbg(fsp),
 472                         (int)fsp->fsp_name->st.st_ex_uid ));
 473                 TALLOC_FREE(smb_fname_parent);
 474                 return;
 475         }
 476
 477         become_root();
 478         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 479         unbecome_root();
 480         if (ret == -1) {
 481                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 482                          "file %s to parent directory uid %u. Error "
 483                          "was %s\n", fsp_str_dbg(fsp),
 484                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 485                          strerror(errno) ));
 486         } else {
 487                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 488                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 489                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 490                 /* Ensure the uid entry is updated. */
 491                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 492         }
 493
 494         TALLOC_FREE(smb_fname_parent);
 495 }
 496
 497 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 498                                        const char *inherit_from_dir,
 499                                        const char *fname,
 500                                        SMB_STRUCT_STAT *psbuf)
 501 {
 502         struct smb_filename *smb_fname_parent;
 503         struct smb_filename *smb_fname_cwd = NULL;
 504         char *saved_dir = NULL;
 505         TALLOC_CTX *ctx = talloc_tos();
 506         NTSTATUS status = NT_STATUS_OK;
 507         int ret;
 508
 509         smb_fname_parent = synthetic_smb_fname(ctx, inherit_from_dir,
 510                                                NULL, NULL);
 511         if (smb_fname_parent == NULL) {
 512                 return NT_STATUS_NO_MEMORY;
 513         }
 514
 515         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 516         if (ret == -1) {
 517                 status = map_nt_error_from_unix(errno);
 518                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 519                          "directory %s. Error was %s\n",
 520                          smb_fname_str_dbg(smb_fname_parent),
 521                          strerror(errno)));
 522                 goto out;
 523         }
 524
 525         /* We've already done an lstat into psbuf, and we know it's a
 526            directory. If we can cd into the directory and the dev/ino
 527            are the same then we can safely chown without races as
 528            we're locking the directory in place by being in it.  This
 529            should work on any UNIX (thanks tridge :-). JRA.
 530         */
 531
 532         saved_dir = vfs_GetWd(ctx,conn);
 533         if (!saved_dir) {
 534                 status = map_nt_error_from_unix(errno);
 535                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 536                          "current working directory. Error was %s\n",
 537                          strerror(errno)));
 538                 goto out;
 539         }
 540
 541         /* Chdir into the new path. */
 542         if (vfs_ChDir(conn, fname) == -1) {
 543                 status = map_nt_error_from_unix(errno);
 544                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 545                          "current working directory to %s. Error "
 546                          "was %s\n", fname, strerror(errno) ));
 547                 goto chdir;
 548         }
 549
 550         smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL);
 551         if (smb_fname_cwd == NULL) {
 552                 status = NT_STATUS_NO_MEMORY;
 553                 goto chdir;
 554         }
 555
 556         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 557         if (ret == -1) {
 558                 status = map_nt_error_from_unix(errno);
 559                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 560                          "directory '.' (%s) Error was %s\n",
 561                          fname, strerror(errno)));
 562                 goto chdir;
 563         }
 564
 565         /* Ensure we're pointing at the same place. */
 566         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 567             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 568                 DEBUG(0,("change_dir_owner_to_parent: "
 569                          "device/inode on directory %s changed. "
 570                          "Refusing to chown !\n", fname ));
 571                 status = NT_STATUS_ACCESS_DENIED;
 572                 goto chdir;
 573         }
 574
 575         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 576                 /* Already this uid - no need to change. */
 577                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 578                         "is already owned by uid %d\n",
 579                         fname,
 580                         (int)smb_fname_cwd->st.st_ex_uid ));
 581                 status = NT_STATUS_OK;
 582                 goto chdir;
 583         }
 584
 585         become_root();
 586         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 587                             (gid_t)-1);
 588         unbecome_root();
 589         if (ret == -1) {
 590                 status = map_nt_error_from_unix(errno);
 591                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 592                           "directory %s to parent directory uid %u. "
 593                           "Error was %s\n", fname,
 594                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 595                           strerror(errno) ));
 596         } else {
 597                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 598                         "directory %s to parent directory uid %u.\n",
 599                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 600                 /* Ensure the uid entry is updated. */
 601                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 602         }
 603
 604  chdir:
 605         vfs_ChDir(conn,saved_dir);
 606  out:
 607         TALLOC_FREE(smb_fname_parent);
 608         TALLOC_FREE(smb_fname_cwd);
 609         return status;
 610 }
 611
 612 /****************************************************************************
 613  Open a file - returning a guaranteed ATOMIC indication of if the
 614  file was created or not.
 615 ****************************************************************************/
 616
 617 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
 618                         files_struct *fsp,
 619                         int flags,
 620                         mode_t mode,
 621                         bool *file_created)
 622 {
 623         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 624         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 625
 626         *file_created = false;
 627
 628         if (!(flags & O_CREAT)) {
 629                 /*
 630                  * We're not creating the file, just pass through.
 631                  */
 632                 return fd_open(conn, fsp, flags, mode);
 633         }
 634
 635         if (flags & O_EXCL) {
 636                 /*
 637                  * Fail if already exists, just pass through.
 638                  */
 639                 status = fd_open(conn, fsp, flags, mode);
 640
 641                 /*
 642                  * Here we've opened with O_CREAT|O_EXCL. If that went
 643                  * NT_STATUS_OK, we *know* we created this file.
 644                  */
 645                 *file_created = NT_STATUS_IS_OK(status);
 646
 647                 return status;
 648         }
 649
 650         /*
 651          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
 652          * To know absolutely if we created the file or not,
 653          * we can never call O_CREAT without O_EXCL. So if
 654          * we think the file existed, try without O_CREAT|O_EXCL.
 655          * If we think the file didn't exist, try with
 656          * O_CREAT|O_EXCL. Keep bouncing between these two
 657          * requests until either the file is created, or
 658          * opened. Either way, we keep going until we get
 659          * a returnable result (error, or open/create).
 660          */
 661
 662         while(1) {
 663                 int curr_flags = flags;
 664
 665                 if (file_existed) {
 666                         /* Just try open, do not create. */
 667                         curr_flags &= ~(O_CREAT);
 668                         status = fd_open(conn, fsp, curr_flags, mode);
 669                         if (NT_STATUS_EQUAL(status,
 670                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 671                                 /*
 672                                  * Someone deleted it in the meantime.
 673                                  * Retry with O_EXCL.
 674                                  */
 675                                 file_existed = false;
 676                                 DEBUG(10,("fd_open_atomic: file %s existed. "
 677                                         "Retry.\n",
 678                                         smb_fname_str_dbg(fsp->fsp_name)));
 679                                         continue;
 680                         }
 681                 } else {
 682                         /* Try create exclusively, fail if it exists. */
 683                         curr_flags |= O_EXCL;
 684                         status = fd_open(conn, fsp, curr_flags, mode);
 685                         if (NT_STATUS_EQUAL(status,
 686                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
 687                                 /*
 688                                  * Someone created it in the meantime.
 689                                  * Retry without O_CREAT.
 690                                  */
 691                                 file_existed = true;
 692                                 DEBUG(10,("fd_open_atomic: file %s "
 693                                         "did not exist. Retry.\n",
 694                                         smb_fname_str_dbg(fsp->fsp_name)));
 695                                 continue;
 696                         }
 697                         if (NT_STATUS_IS_OK(status)) {
 698                                 /*
 699                                  * Here we've opened with O_CREAT|O_EXCL
 700                                  * and got success. We *know* we created
 701                                  * this file.
 702                                  */
 703                                 *file_created = true;
 704                         }
 705                 }
 706                 /* Create is done, or failed. */
 707                 break;
 708         }
 709         return status;
 710 }
 711
 712 /****************************************************************************
 713  Open a file.
 714 ****************************************************************************/
 715
 716 static NTSTATUS open_file(files_struct *fsp,
 717                           connection_struct *conn,
 718                           struct smb_request *req,
 719                           const char *parent_dir,
 720                           int flags,
 721                           mode_t unx_mode,
 722                           uint32_t access_mask, /* client requested access mask. */
 723                           uint32_t open_access_mask, /* what we're actually using in the open. */
 724                           bool *p_file_created)
 725 {
 726         struct smb_filename *smb_fname = fsp->fsp_name;
 727         NTSTATUS status = NT_STATUS_OK;
 728         int accmode = (flags & O_ACCMODE);
 729         int local_flags = flags;
 730         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 731
 732         fsp->fh->fd = -1;
 733         errno = EPERM;
 734
 735         /* Check permissions */
 736
 737         /*
 738          * This code was changed after seeing a client open request
 739          * containing the open mode of (DENY_WRITE/read-only) with
 740          * the 'create if not exist' bit set. The previous code
 741          * would fail to open the file read only on a read-only share
 742          * as it was checking the flags parameter  directly against O_RDONLY,
 743          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 744          * JRA.
 745          */
 746
 747         if (!CAN_WRITE(conn)) {
 748                 /* It's a read-only share - fail if we wanted to write. */
 749                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 750                         DEBUG(3,("Permission denied opening %s\n",
 751                                  smb_fname_str_dbg(smb_fname)));
 752                         return NT_STATUS_ACCESS_DENIED;
 753                 }
 754                 if (flags & O_CREAT) {
 755                         /* We don't want to write - but we must make sure that
 756                            O_CREAT doesn't create the file if we have write
 757                            access into the directory.
 758                         */
 759                         flags &= ~(O_CREAT|O_EXCL);
 760                         local_flags &= ~(O_CREAT|O_EXCL);
 761                 }
 762         }
 763
 764         /*
 765          * This little piece of insanity is inspired by the
 766          * fact that an NT client can open a file for O_RDONLY,
 767          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 768          * If the client *can* write to the file, then it expects to
 769          * truncate the file, even though it is opening for readonly.
 770          * Quicken uses this stupid trick in backup file creation...
 771          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 772          * for helping track this one down. It didn't bite us in 2.0.x
 773          * as we always opened files read-write in that release. JRA.
 774          */
 775
 776         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 777                 DEBUG(10,("open_file: truncate requested on read-only open "
 778                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 779                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 780         }
 781
 782         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 783             (!file_existed && (local_flags & O_CREAT)) ||
 784             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 785                 const char *wild;
 786                 int ret;
 787
 788 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 789                 /*
 790                  * We would block on opening a FIFO with no one else on the
 791                  * other end. Do what we used to do and add O_NONBLOCK to the
 792                  * open flags. JRA.
 793                  */
 794
 795                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 796                         local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
 797                         local_flags |= O_NONBLOCK;
 798                 }
 799 #endif
 800
 801                 /* Don't create files with Microsoft wildcard characters. */
 802                 if (fsp->base_fsp) {
 803                         /*
 804                          * wildcard characters are allowed in stream names
 805                          * only test the basefilename
 806                          */
 807                         wild = fsp->base_fsp->fsp_name->base_name;
 808                 } else {
 809                         wild = smb_fname->base_name;
 810                 }
 811                 if ((local_flags & O_CREAT) && !file_existed &&
 812                     ms_has_wild(wild))  {
 813                         return NT_STATUS_OBJECT_NAME_INVALID;
 814                 }
 815
 816                 /* Can we access this file ? */
 817                 if (!fsp->base_fsp) {
 818                         /* Only do this check on non-stream open. */
 819                         if (file_existed) {
 820                                 status = smbd_check_access_rights(conn,
 821                                                 smb_fname,
 822                                                 false,
 823                                                 access_mask);
 824
 825                                 if (!NT_STATUS_IS_OK(status)) {
 826                                         DEBUG(10, ("open_file: "
 827                                                    "smbd_check_access_rights "
 828                                                    "on file %s returned %s\n",
 829                                                    smb_fname_str_dbg(smb_fname),
 830                                                    nt_errstr(status)));
 831                                 }
 832
 833                                 if (!NT_STATUS_IS_OK(status) &&
 834                                     !NT_STATUS_EQUAL(status,
 835                                         NT_STATUS_OBJECT_NAME_NOT_FOUND))
 836                                 {
 837                                         return status;
 838                                 }
 839
 840                                 if (NT_STATUS_EQUAL(status,
 841                                         NT_STATUS_OBJECT_NAME_NOT_FOUND))
 842                                 {
 843                                         DEBUG(10, ("open_file: "
 844                                                 "file %s vanished since we "
 845                                                 "checked for existence.\n",
 846                                                 smb_fname_str_dbg(smb_fname)));
 847                                         file_existed = false;
 848                                         SET_STAT_INVALID(fsp->fsp_name->st);
 849                                 }
 850                         }
 851
 852                         if (!file_existed) {
 853                                 if (!(local_flags & O_CREAT)) {
 854                                         /* File didn't exist and no O_CREAT. */
 855                                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 856                                 }
 857
 858                                 status = check_parent_access(conn,
 859                                                              smb_fname,
 860                                                              SEC_DIR_ADD_FILE);
 861                                 if (!NT_STATUS_IS_OK(status)) {
 862                                         DEBUG(10, ("open_file: "
 863                                                    "check_parent_access on "
 864                                                    "file %s returned %s\n",
 865                                                    smb_fname_str_dbg(smb_fname),
 866                                                    nt_errstr(status) ));
 867                                         return status;
 868                                 }
 869                         }
 870                 }
 871
 872                 /*
 873                  * Actually do the open - if O_TRUNC is needed handle it
 874                  * below under the share mode lock.
 875                  */
 876                 status = fd_open_atomic(conn, fsp, local_flags & ~O_TRUNC,
 877                                 unx_mode, p_file_created);
 878                 if (!NT_STATUS_IS_OK(status)) {
 879                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 880                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 881                                  nt_errstr(status),local_flags,flags));
 882                         return status;
 883                 }
 884
 885                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 886                 if (ret == -1) {
 887                         /* If we have an fd, this stat should succeed. */
 888                         DEBUG(0,("Error doing fstat on open file %s "
 889                                 "(%s)\n",
 890                                 smb_fname_str_dbg(smb_fname),
 891                                 strerror(errno) ));
 892                         status = map_nt_error_from_unix(errno);
 893                         fd_close(fsp);
 894                         return status;
 895                 }
 896
 897                 if (*p_file_created) {
 898                         /* We created this file. */
 899
 900                         bool need_re_stat = false;
 901                         /* Do all inheritance work after we've
 902                            done a successful fstat call and filled
 903                            in the stat struct in fsp->fsp_name. */
 904
 905                         /* Inherit the ACL if required */
 906                         if (lp_inherit_permissions(SNUM(conn))) {
 907                                 inherit_access_posix_acl(conn, parent_dir,
 908                                                          smb_fname->base_name,
 909                                                          unx_mode);
 910                                 need_re_stat = true;
 911                         }
 912
 913                         /* Change the owner if required. */
 914                         if (lp_inherit_owner(SNUM(conn))) {
 915                                 change_file_owner_to_parent(conn, parent_dir,
 916                                                             fsp);
 917                                 need_re_stat = true;
 918                         }
 919
 920                         if (need_re_stat) {
 921                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 922                                 /* If we have an fd, this stat should succeed. */
 923                                 if (ret == -1) {
 924                                         DEBUG(0,("Error doing fstat on open file %s "
 925                                                  "(%s)\n",
 926                                                  smb_fname_str_dbg(smb_fname),
 927                                                  strerror(errno) ));
 928                                 }
 929                         }
 930
 931                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 932                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 933                                      smb_fname->base_name);
 934                 }
 935         } else {
 936                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 937                 if (!file_existed) {
 938                         /* File must exist for a stat open. */
 939                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 940                 }
 941
 942                 status = smbd_check_access_rights(conn,
 943                                 smb_fname,
 944                                 false,
 945                                 access_mask);
 946
 947                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 948                                 fsp->posix_open &&
 949                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 950                         /* This is a POSIX stat open for delete
 951                          * or rename on a symlink that points
 952                          * nowhere. Allow. */
 953                         DEBUG(10,("open_file: allowing POSIX "
 954                                   "open on bad symlink %s\n",
 955                                   smb_fname_str_dbg(smb_fname)));
 956                         status = NT_STATUS_OK;
 957                 }
 958
 959                 if (!NT_STATUS_IS_OK(status)) {
 960                         DEBUG(10,("open_file: "
 961                                 "smbd_check_access_rights on file "
 962                                 "%s returned %s\n",
 963                                 smb_fname_str_dbg(smb_fname),
 964                                 nt_errstr(status) ));
 965                         return status;
 966                 }
 967         }
 968
 969         /*
 970          * POSIX allows read-only opens of directories. We don't
 971          * want to do this (we use a different code path for this)
 972          * so catch a directory open and return an EISDIR. JRA.
 973          */
 974
 975         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 976                 fd_close(fsp);
 977                 errno = EISDIR;
 978                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 979         }
 980
 981         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 982         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 983         fsp->file_pid = req ? req->smbpid : 0;
 984         fsp->can_lock = True;
 985         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
 986         fsp->can_write =
 987                 CAN_WRITE(conn) &&
 988                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
 989         fsp->print_file = NULL;
 990         fsp->modified = False;
 991         fsp->sent_oplock_break = NO_BREAK_SENT;
 992         fsp->is_directory = False;
 993         if (conn->aio_write_behind_list &&
 994             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 995                        conn->case_sensitive)) {
 996                 fsp->aio_write_behind = True;
 997         }
 998
 999         fsp->wcp = NULL; /* Write cache pointer. */
1000
1001         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
1002                  conn->session_info->unix_info->unix_name,
1003                  smb_fname_str_dbg(smb_fname),
1004                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
1005                  conn->num_files_open));
1006
1007         errno = 0;
1008         return NT_STATUS_OK;
1009 }
1010
1011 /****************************************************************************
1012  Check if we can open a file with a share mode.
1013  Returns True if conflict, False if not.
1014 ****************************************************************************/
1015
1016 static bool share_conflict(struct share_mode_entry *entry,
1017                            uint32_t access_mask,
1018                            uint32_t share_access)
1019 {
1020         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
1021                   "entry->share_access = 0x%x, "
1022                   "entry->private_options = 0x%x\n",
1023                   (unsigned int)entry->access_mask,
1024                   (unsigned int)entry->share_access,
1025                   (unsigned int)entry->private_options));
1026
1027         if (server_id_is_disconnected(&entry->pid)) {
1028                 /*
1029                  * note: cleanup should have been done by
1030                  * delay_for_batch_oplocks()
1031                  */
1032                 return false;
1033         }
1034
1035         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
1036                   (unsigned int)access_mask, (unsigned int)share_access));
1037
1038         if ((entry->access_mask & (FILE_WRITE_DATA|
1039                                    FILE_APPEND_DATA|
1040                                    FILE_READ_DATA|
1041                                    FILE_EXECUTE|
1042                                    DELETE_ACCESS)) == 0) {
1043                 DEBUG(10,("share_conflict: No conflict due to "
1044                           "entry->access_mask = 0x%x\n",
1045                           (unsigned int)entry->access_mask ));
1046                 return False;
1047         }
1048
1049         if ((access_mask & (FILE_WRITE_DATA|
1050                             FILE_APPEND_DATA|
1051                             FILE_READ_DATA|
1052                             FILE_EXECUTE|
1053                             DELETE_ACCESS)) == 0) {
1054                 DEBUG(10,("share_conflict: No conflict due to "
1055                           "access_mask = 0x%x\n",
1056                           (unsigned int)access_mask ));
1057                 return False;
1058         }
1059
1060 #if 1 /* JRA TEST - Superdebug. */
1061 #define CHECK_MASK(num, am, right, sa, share) \
1062         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
1063                 (unsigned int)(num), (unsigned int)(am), \
1064                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
1065         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
1066                 (unsigned int)(num), (unsigned int)(sa), \
1067                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
1068         if (((am) & (right)) && !((sa) & (share))) { \
1069                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1070 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1071                         (unsigned int)(share) )); \
1072                 return True; \
1073         }
1074 #else
1075 #define CHECK_MASK(num, am, right, sa, share) \
1076         if (((am) & (right)) && !((sa) & (share))) { \
1077                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1078 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1079                         (unsigned int)(share) )); \
1080                 return True; \
1081         }
1082 #endif
1083
1084         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1085                    share_access, FILE_SHARE_WRITE);
1086         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1087                    entry->share_access, FILE_SHARE_WRITE);
1088
1089         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1090                    share_access, FILE_SHARE_READ);
1091         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1092                    entry->share_access, FILE_SHARE_READ);
1093
1094         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1095                    share_access, FILE_SHARE_DELETE);
1096         CHECK_MASK(6, access_mask, DELETE_ACCESS,
1097                    entry->share_access, FILE_SHARE_DELETE);
1098
1099         DEBUG(10,("share_conflict: No conflict.\n"));
1100         return False;
1101 }
1102
1103 #if defined(DEVELOPER)
1104 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1105                                       int num,
1106                                       struct share_mode_entry *share_entry)
1107 {
1108         struct server_id self = messaging_server_id(sconn->msg_ctx);
1109         files_struct *fsp;
1110
1111         if (!serverid_equal(&self, &share_entry->pid)) {
1112                 return;
1113         }
1114
1115         if (share_entry->op_mid == 0) {
1116                 /* INTERNAL_OPEN_ONLY */
1117                 return;
1118         }
1119
1120         if (!is_valid_share_mode_entry(share_entry)) {
1121                 return;
1122         }
1123
1124         fsp = file_find_dif(sconn, share_entry->id,
1125                             share_entry->share_file_id);
1126         if (!fsp) {
1127                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1128                          share_mode_str(talloc_tos(), num, share_entry) ));
1129                 smb_panic("validate_my_share_entries: Cannot match a "
1130                           "share entry with an open file\n");
1131         }
1132
1133         if (((uint16_t)fsp->oplock_type) != share_entry->op_type) {
1134                 goto panic;
1135         }
1136
1137         return;
1138
1139  panic:
1140         {
1141                 char *str;
1142                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1143                          share_mode_str(talloc_tos(), num, share_entry) ));
1144                 str = talloc_asprintf(talloc_tos(),
1145                         "validate_my_share_entries: "
1146                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1147                          fsp->fsp_name->base_name,
1148                          (unsigned int)fsp->oplock_type,
1149                          (unsigned int)share_entry->op_type );
1150                 smb_panic(str);
1151         }
1152 }
1153 #endif
1154
1155 bool is_stat_open(uint32_t access_mask)
1156 {
1157         const uint32_t stat_open_bits =
1158                 (SYNCHRONIZE_ACCESS|
1159                  FILE_READ_ATTRIBUTES|
1160                  FILE_WRITE_ATTRIBUTES);
1161
1162         return (((access_mask &  stat_open_bits) != 0) &&
1163                 ((access_mask & ~stat_open_bits) == 0));
1164 }
1165
1166 static bool has_delete_on_close(struct share_mode_lock *lck,
1167                                 uint32_t name_hash)
1168 {
1169         struct share_mode_data *d = lck->data;
1170         uint32_t i;
1171
1172         if (d->num_share_modes == 0) {
1173                 return false;
1174         }
1175         if (!is_delete_on_close_set(lck, name_hash)) {
1176                 return false;
1177         }
1178         for (i=0; i<d->num_share_modes; i++) {
1179                 if (!share_mode_stale_pid(d, i)) {
1180                         return true;
1181                 }
1182         }
1183         return false;
1184 }
1185
1186 /****************************************************************************
1187  Deal with share modes
1188  Invariant: Share mode must be locked on entry and exit.
1189  Returns -1 on error, or number of share modes on success (may be zero).
1190 ****************************************************************************/
1191
1192 static NTSTATUS open_mode_check(connection_struct *conn,
1193                                 struct share_mode_lock *lck,
1194                                 uint32_t access_mask,
1195                                 uint32_t share_access)
1196 {
1197         int i;
1198
1199         if(lck->data->num_share_modes == 0) {
1200                 return NT_STATUS_OK;
1201         }
1202
1203         if (is_stat_open(access_mask)) {
1204                 /* Stat open that doesn't trigger oplock breaks or share mode
1205                  * checks... ! JRA. */
1206                 return NT_STATUS_OK;
1207         }
1208
1209         /*
1210          * Check if the share modes will give us access.
1211          */
1212
1213 #if defined(DEVELOPER)
1214         for(i = 0; i < lck->data->num_share_modes; i++) {
1215                 validate_my_share_entries(conn->sconn, i,
1216                                           &lck->data->share_modes[i]);
1217         }
1218 #endif
1219
1220         /* Now we check the share modes, after any oplock breaks. */
1221         for(i = 0; i < lck->data->num_share_modes; i++) {
1222
1223                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1224                         continue;
1225                 }
1226
1227                 /* someone else has a share lock on it, check to see if we can
1228                  * too */
1229                 if (share_conflict(&lck->data->share_modes[i],
1230                                    access_mask, share_access)) {
1231
1232                         if (share_mode_stale_pid(lck->data, i)) {
1233                                 continue;
1234                         }
1235
1236                         return NT_STATUS_SHARING_VIOLATION;
1237                 }
1238         }
1239
1240         return NT_STATUS_OK;
1241 }
1242
1243 /*
1244  * Send a break message to the oplock holder and delay the open for
1245  * our client.
1246  */
1247
1248 NTSTATUS send_break_message(struct messaging_context *msg_ctx,
1249                                    const struct share_mode_entry *exclusive,
1250                                    uint16_t break_to)
1251 {
1252         NTSTATUS status;
1253         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1254         struct server_id_buf tmp;
1255
1256         DEBUG(10, ("Sending break request to PID %s\n",
1257                    server_id_str_buf(exclusive->pid, &tmp)));
1258
1259         /* Create the message. */
1260         share_mode_entry_to_message(msg, exclusive);
1261
1262         /* Overload entry->op_type */
1263         /*
1264          * This is a cut from uint32_t to uint16_t, but so far only the lower 3
1265          * bits (LEASE_WRITE/HANDLE/READ are used anyway.
1266          */
1267         SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET, break_to);
1268
1269         status = messaging_send_buf(msg_ctx, exclusive->pid,
1270                                     MSG_SMB_BREAK_REQUEST,
1271                                     (uint8_t *)msg, sizeof(msg));
1272         if (!NT_STATUS_IS_OK(status)) {
1273                 DEBUG(3, ("Could not send oplock break message: %s\n",
1274                           nt_errstr(status)));
1275         }
1276
1277         return status;
1278 }
1279
1280 /*
1281  * Do internal consistency checks on the share mode for a file.
1282  */
1283
1284 static bool validate_oplock_types(struct share_mode_lock *lck)
1285 {
1286         struct share_mode_data *d = lck->data;
1287         bool batch = false;
1288         bool ex_or_batch = false;
1289         bool level2 = false;
1290         bool no_oplock = false;
1291         uint32_t num_non_stat_opens = 0;
1292         uint32_t i;
1293
1294         for (i=0; i<d->num_share_modes; i++) {
1295                 struct share_mode_entry *e = &d->share_modes[i];
1296
1297                 if (!is_valid_share_mode_entry(e)) {
1298                         continue;
1299                 }
1300
1301                 if (e->op_mid == 0) {
1302                         /* INTERNAL_OPEN_ONLY */
1303                         continue;
1304                 }
1305
1306                 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1307                         /* We ignore stat opens in the table - they
1308                            always have NO_OPLOCK and never get or
1309                            cause breaks. JRA. */
1310                         continue;
1311                 }
1312
1313                 num_non_stat_opens += 1;
1314
1315                 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1316                         /* batch - can only be one. */
1317                         if (share_mode_stale_pid(d, i)) {
1318                                 DEBUG(10, ("Found stale batch oplock\n"));
1319                                 continue;
1320                         }
1321                         if (ex_or_batch || batch || level2 || no_oplock) {
1322                                 DEBUG(0, ("Bad batch oplock entry %u.",
1323                                           (unsigned)i));
1324                                 return false;
1325                         }
1326                         batch = true;
1327                 }
1328
1329                 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1330                         if (share_mode_stale_pid(d, i)) {
1331                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1332                                 continue;
1333                         }
1334                         /* Exclusive or batch - can only be one. */
1335                         if (ex_or_batch || level2 || no_oplock) {
1336                                 DEBUG(0, ("Bad exclusive or batch oplock "
1337                                           "entry %u.", (unsigned)i));
1338                                 return false;
1339                         }
1340                         ex_or_batch = true;
1341                 }
1342
1343                 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1344                         if (batch || ex_or_batch) {
1345                                 if (share_mode_stale_pid(d, i)) {
1346                                         DEBUG(10, ("Found stale LevelII "
1347                                                    "oplock\n"));
1348                                         continue;
1349                                 }
1350                                 DEBUG(0, ("Bad levelII oplock entry %u.",
1351                                           (unsigned)i));
1352                                 return false;
1353                         }
1354                         level2 = true;
1355                 }
1356
1357                 if (e->op_type == NO_OPLOCK) {
1358                         if (batch || ex_or_batch) {
1359                                 if (share_mode_stale_pid(d, i)) {
1360                                         DEBUG(10, ("Found stale NO_OPLOCK "
1361                                                    "entry\n"));
1362                                         continue;
1363                                 }
1364                                 DEBUG(0, ("Bad no oplock entry %u.",
1365                                           (unsigned)i));
1366                                 return false;
1367                         }
1368                         no_oplock = true;
1369                 }
1370         }
1371
1372         remove_stale_share_mode_entries(d);
1373
1374         if ((batch || ex_or_batch) && (num_non_stat_opens != 1)) {
1375                 DEBUG(1, ("got batch (%d) or ex (%d) non-exclusively (%d)\n",
1376                           (int)batch, (int)ex_or_batch,
1377                           (int)d->num_share_modes));
1378                 return false;
1379         }
1380
1381         return true;
1382 }
1383
1384 static bool delay_for_oplock(files_struct *fsp,
1385                              int oplock_request,
1386                              const struct smb2_lease *lease,
1387                              struct share_mode_lock *lck,
1388                              bool have_sharing_violation,
1389                              uint32_t create_disposition,
1390                              bool first_open_attempt)
1391 {
1392         struct share_mode_data *d = lck->data;
1393         uint32_t i;
1394         bool delay = false;
1395         bool will_overwrite;
1396
1397         if ((oplock_request & INTERNAL_OPEN_ONLY) ||
1398             is_stat_open(fsp->access_mask)) {
1399                 return false;
1400         }
1401
1402         switch (create_disposition) {
1403         case FILE_SUPERSEDE:
1404         case FILE_OVERWRITE:
1405         case FILE_OVERWRITE_IF:
1406                 will_overwrite = true;
1407                 break;
1408         default:
1409                 will_overwrite = false;
1410                 break;
1411         }
1412
1413         for (i=0; i<d->num_share_modes; i++) {
1414                 struct share_mode_entry *e = &d->share_modes[i];
1415                 struct share_mode_lease *l = NULL;
1416                 uint32_t e_lease_type = get_lease_type(d, e);
1417                 uint32_t break_to;
1418                 uint32_t delay_mask = 0;
1419
1420                 if (e->op_type == LEASE_OPLOCK) {
1421                         l = &d->leases[e->lease_idx];
1422                 }
1423
1424                 if (have_sharing_violation) {
1425                         delay_mask = SMB2_LEASE_HANDLE;
1426                 } else {
1427                         delay_mask = SMB2_LEASE_WRITE;
1428                 }
1429
1430                 break_to = e_lease_type & ~delay_mask;
1431
1432                 if (will_overwrite) {
1433                         /*
1434                          * we'll decide about SMB2_LEASE_READ later.
1435                          *
1436                          * Maybe the break will be defered
1437                          */
1438                         break_to &= ~SMB2_LEASE_HANDLE;
1439                 }
1440
1441                 DEBUG(10, ("entry %u: e_lease_type %u, will_overwrite: %u\n",
1442                            (unsigned)i, (unsigned)e_lease_type,
1443                            (unsigned)will_overwrite));
1444
1445                 if (lease != NULL && l != NULL) {
1446                         bool ign;
1447
1448                         ign = smb2_lease_equal(fsp_client_guid(fsp),
1449                                                &lease->lease_key,
1450                                                &l->client_guid,
1451                                                &l->lease_key);
1452                         if (ign) {
1453                                 continue;
1454                         }
1455                 }
1456
1457                 if ((e_lease_type & ~break_to) == 0) {
1458                         if (l != NULL && l->breaking) {
1459                                 delay = true;
1460                         }
1461                         continue;
1462                 }
1463
1464                 if (share_mode_stale_pid(d, i)) {
1465                         continue;
1466                 }
1467
1468                 if (will_overwrite) {
1469                         /*
1470                          * If we break anyway break to NONE directly.
1471                          * Otherwise vfs_set_filelen() will trigger the
1472                          * break.
1473                          */
1474                         break_to &= ~(SMB2_LEASE_READ|SMB2_LEASE_WRITE);
1475                 }
1476
1477                 if (e->op_type != LEASE_OPLOCK) {
1478                         /*
1479                          * Oplocks only support breaking to R or NONE.
1480                          */
1481                         break_to &= ~(SMB2_LEASE_HANDLE|SMB2_LEASE_WRITE);
1482                 }
1483
1484                 DEBUG(10, ("breaking from %d to %d\n",
1485                            (int)e_lease_type, (int)break_to));
1486                 send_break_message(fsp->conn->sconn->msg_ctx, e,
1487                                    break_to);
1488                 if (e_lease_type & delay_mask) {
1489                         delay = true;
1490                 }
1491                 if (l != NULL && l->breaking && !first_open_attempt) {
1492                         delay = true;
1493                 }
1494                 continue;
1495         }
1496
1497         return delay;
1498 }
1499
1500 static bool file_has_brlocks(files_struct *fsp)
1501 {
1502         struct byte_range_lock *br_lck;
1503
1504         br_lck = brl_get_locks_readonly(fsp);
1505         if (!br_lck)
1506                 return false;
1507
1508         return (brl_num_locks(br_lck) > 0);
1509 }
1510
1511 int find_share_mode_lease(struct share_mode_data *d,
1512                           const struct GUID *client_guid,
1513                           const struct smb2_lease_key *key)
1514 {
1515         uint32_t i;
1516
1517         for (i=0; i<d->num_leases; i++) {
1518                 struct share_mode_lease *l = &d->leases[i];
1519
1520                 if (smb2_lease_equal(client_guid,
1521                                      key,
1522                                      &l->client_guid,
1523                                      &l->lease_key)) {
1524                         return i;
1525                 }
1526         }
1527
1528         return -1;
1529 }
1530
1531 struct fsp_lease *find_fsp_lease(struct files_struct *new_fsp,
1532                                  const struct smb2_lease_key *key,
1533                                  const struct share_mode_lease *l)
1534 {
1535         struct files_struct *fsp;
1536
1537         /*
1538          * TODO: Measure how expensive this loop is with thousands of open
1539          * handles...
1540          */
1541
1542         for (fsp = file_find_di_first(new_fsp->conn->sconn, new_fsp->file_id);
1543              fsp != NULL;
1544              fsp = file_find_di_next(fsp)) {
1545
1546                 if (fsp == new_fsp) {
1547                         continue;
1548                 }
1549                 if (fsp->oplock_type != LEASE_OPLOCK) {
1550                         continue;
1551                 }
1552                 if (smb2_lease_key_equal(&fsp->lease->lease.lease_key, key)) {
1553                         fsp->lease->ref_count += 1;
1554                         return fsp->lease;
1555                 }
1556         }
1557
1558         /* Not found - must be leased in another smbd. */
1559         new_fsp->lease = talloc_zero(new_fsp->conn->sconn, struct fsp_lease);
1560         if (new_fsp->lease == NULL) {
1561                 return NULL;
1562         }
1563         new_fsp->lease->ref_count = 1;
1564         new_fsp->lease->sconn = new_fsp->conn->sconn;
1565         new_fsp->lease->lease.lease_key = *key;
1566         new_fsp->lease->lease.lease_state = l->current_state;
1567         /*
1568          * We internally treat all leases as V2 and update
1569          * the epoch, but when sending breaks it matters if
1570          * the requesting lease was v1 or v2.
1571          */
1572         new_fsp->lease->lease.lease_version = l->lease_version;
1573         new_fsp->lease->lease.lease_epoch = l->epoch;
1574         return new_fsp->lease;
1575 }
1576
1577 static NTSTATUS grant_fsp_lease(struct files_struct *fsp,
1578                                 struct share_mode_lock *lck,
1579                                 const struct smb2_lease *lease,
1580                                 uint32_t *p_lease_idx,
1581                                 uint32_t granted)
1582 {
1583         struct share_mode_data *d = lck->data;
1584         const struct GUID *client_guid = fsp_client_guid(fsp);
1585         struct share_mode_lease *tmp;
1586         NTSTATUS status;
1587         int idx;
1588
1589         idx = find_share_mode_lease(d, client_guid, &lease->lease_key);
1590
1591         if (idx != -1) {
1592                 struct share_mode_lease *l = &d->leases[idx];
1593                 bool do_upgrade;
1594                 uint32_t existing, requested;
1595
1596                 fsp->lease = find_fsp_lease(fsp, &lease->lease_key, l);
1597                 if (fsp->lease == NULL) {
1598                         DEBUG(1, ("Did not find existing lease for file %s\n",
1599                                   fsp_str_dbg(fsp)));
1600                         return NT_STATUS_NO_MEMORY;
1601                 }
1602
1603                 *p_lease_idx = idx;
1604
1605                 /*
1606                  * Upgrade only if the requested lease is a strict upgrade.
1607                  */
1608                 existing = l->current_state;
1609                 requested = lease->lease_state;
1610
1611                 /*
1612                  * Tricky: This test makes sure that "requested" is a
1613                  * strict bitwise superset of "existing".
1614                  */
1615                 do_upgrade = ((existing & requested) == existing);
1616
1617                 /*
1618                  * Upgrade only if there's a change.
1619                  */
1620                 do_upgrade &= (granted != existing);
1621
1622                 /*
1623                  * Upgrade only if other leases don't prevent what was asked
1624                  * for.
1625                  */
1626                 do_upgrade &= (granted == requested);
1627
1628                 /*
1629                  * only upgrade if we are not in breaking state
1630                  */
1631                 do_upgrade &= !l->breaking;
1632
1633                 DEBUG(10, ("existing=%"PRIu32", requested=%"PRIu32", "
1634                            "granted=%"PRIu32", do_upgrade=%d\n",
1635                            existing, requested, granted, (int)do_upgrade));
1636
1637                 if (do_upgrade) {
1638                         l->current_state = granted;
1639                         l->epoch += 1;
1640                 }
1641
1642                 /* Ensure we're in sync with current lease state. */
1643                 fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
1644                 return NT_STATUS_OK;
1645         }
1646
1647         /*
1648          * Create new lease
1649          */
1650
1651         tmp = talloc_realloc(d, d->leases, struct share_mode_lease,
1652                              d->num_leases+1);
1653         if (tmp == NULL) {
1654                 /*
1655                  * See [MS-SMB2]
1656                  */
1657                 return NT_STATUS_INSUFFICIENT_RESOURCES;
1658         }
1659         d->leases = tmp;
1660
1661         fsp->lease = talloc_zero(fsp->conn->sconn, struct fsp_lease);
1662         if (fsp->lease == NULL) {
1663                 return NT_STATUS_INSUFFICIENT_RESOURCES;
1664         }
1665         fsp->lease->ref_count = 1;
1666         fsp->lease->sconn = fsp->conn->sconn;
1667         fsp->lease->lease.lease_version = lease->lease_version;
1668         fsp->lease->lease.lease_key = lease->lease_key;
1669         fsp->lease->lease.lease_state = granted;
1670         fsp->lease->lease.lease_epoch = lease->lease_epoch + 1;
1671
1672         *p_lease_idx = d->num_leases;
1673
1674         d->leases[d->num_leases] = (struct share_mode_lease) {
1675                 .client_guid = *client_guid,
1676                 .lease_key = fsp->lease->lease.lease_key,
1677                 .current_state = fsp->lease->lease.lease_state,
1678                 .lease_version = fsp->lease->lease.lease_version,
1679                 .epoch = fsp->lease->lease.lease_epoch,
1680         };
1681
1682         status = leases_db_add(client_guid,
1683                                &lease->lease_key,
1684                                &fsp->file_id,
1685                                fsp->conn->connectpath,
1686                                fsp->fsp_name->base_name,
1687                                fsp->fsp_name->stream_name);
1688         if (!NT_STATUS_IS_OK(status)) {
1689                 DEBUG(10, ("%s: leases_db_add failed: %s\n", __func__,
1690                            nt_errstr(status)));
1691                 TALLOC_FREE(fsp->lease);
1692                 return NT_STATUS_INSUFFICIENT_RESOURCES;
1693         }
1694
1695         d->num_leases += 1;
1696         d->modified = true;
1697
1698         return NT_STATUS_OK;
1699 }
1700
1701 static bool is_same_lease(const files_struct *fsp,
1702                           const struct share_mode_data *d,
1703                           const struct share_mode_entry *e,
1704                           const struct smb2_lease *lease)
1705 {
1706         if (e->op_type != LEASE_OPLOCK) {
1707                 return false;
1708         }
1709         if (lease == NULL) {
1710                 return false;
1711         }
1712
1713         return smb2_lease_equal(fsp_client_guid(fsp),
1714                                 &lease->lease_key,
1715                                 &d->leases[e->lease_idx].client_guid,
1716                                 &d->leases[e->lease_idx].lease_key);
1717 }
1718
1719 static NTSTATUS grant_fsp_oplock_type(struct smb_request *req,
1720                                       struct files_struct *fsp,
1721                                       struct share_mode_lock *lck,
1722                                       int oplock_request,
1723                                       struct smb2_lease *lease)
1724 {
1725         struct share_mode_data *d = lck->data;
1726         bool got_handle_lease = false;
1727         bool got_oplock = false;
1728         uint32_t i;
1729         uint32_t granted;
1730         uint32_t lease_idx = UINT32_MAX;
1731         bool ok;
1732         NTSTATUS status;
1733
1734         if (oplock_request & INTERNAL_OPEN_ONLY) {
1735                 /* No oplocks on internal open. */
1736                 oplock_request = NO_OPLOCK;
1737                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1738                         fsp->oplock_type, fsp_str_dbg(fsp)));
1739         }
1740
1741         if (oplock_request == LEASE_OPLOCK) {
1742                 if (lease == NULL) {
1743                         /*
1744                          * The SMB2 layer should have checked this
1745                          */
1746                         return NT_STATUS_INTERNAL_ERROR;
1747                 }
1748
1749                 granted = lease->lease_state;
1750
1751                 if (lp_kernel_oplocks(SNUM(fsp->conn))) {
1752                         DEBUG(10, ("No lease granted because kernel oplocks are enabled\n"));
1753                         granted = SMB2_LEASE_NONE;
1754                 }
1755                 if ((granted & (SMB2_LEASE_READ|SMB2_LEASE_WRITE)) == 0) {
1756                         DEBUG(10, ("No read or write lease requested\n"));
1757                         granted = SMB2_LEASE_NONE;
1758                 }
1759                 if (granted == SMB2_LEASE_WRITE) {
1760                         DEBUG(10, ("pure write lease requested\n"));
1761                         granted = SMB2_LEASE_NONE;
1762                 }
1763                 if (granted == (SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE)) {
1764                         DEBUG(10, ("write and handle lease requested\n"));
1765                         granted = SMB2_LEASE_NONE;
1766                 }
1767         } else {
1768                 granted = map_oplock_to_lease_type(
1769                         oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1770         }
1771
1772         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1773                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1774                         fsp_str_dbg(fsp)));
1775                 granted &= ~SMB2_LEASE_READ;
1776         }
1777
1778         for (i=0; i<d->num_share_modes; i++) {
1779                 struct share_mode_entry *e = &d->share_modes[i];
1780                 uint32_t e_lease_type;
1781
1782                 e_lease_type = get_lease_type(d, e);
1783
1784                 if ((granted & SMB2_LEASE_WRITE) &&
1785                     !is_same_lease(fsp, d, e, lease) &&
1786                     !share_mode_stale_pid(d, i)) {
1787                         /*
1788                          * Can grant only one writer
1789                          */
1790                         granted &= ~SMB2_LEASE_WRITE;
1791                 }
1792
1793                 if ((e_lease_type & SMB2_LEASE_HANDLE) && !got_handle_lease &&
1794                     !share_mode_stale_pid(d, i)) {
1795                         got_handle_lease = true;
1796                 }
1797
1798                 if ((e->op_type != LEASE_OPLOCK) && !got_oplock &&
1799                     !share_mode_stale_pid(d, i)) {
1800                         got_oplock = true;
1801                 }
1802         }
1803
1804         if ((granted & SMB2_LEASE_READ) && !(granted & SMB2_LEASE_WRITE)) {
1805                 bool allow_level2 =
1806                         (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1807                         lp_level2_oplocks(SNUM(fsp->conn));
1808
1809                 if (!allow_level2) {
1810                         granted = SMB2_LEASE_NONE;
1811                 }
1812         }
1813
1814         if (oplock_request == LEASE_OPLOCK) {
1815                 if (got_oplock) {
1816                         granted &= ~SMB2_LEASE_HANDLE;
1817                 }
1818
1819                 fsp->oplock_type = LEASE_OPLOCK;
1820
1821                 status = grant_fsp_lease(fsp, lck, lease, &lease_idx,
1822                                          granted);
1823                 if (!NT_STATUS_IS_OK(status)) {
1824                         return status;
1825
1826                 }
1827                 *lease = fsp->lease->lease;
1828                 DEBUG(10, ("lease_state=%d\n", lease->lease_state));
1829         } else {
1830                 if (got_handle_lease) {
1831                         granted = SMB2_LEASE_NONE;
1832                 }
1833
1834                 switch (granted) {
1835                 case SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE:
1836                         fsp->oplock_type = BATCH_OPLOCK|EXCLUSIVE_OPLOCK;
1837                         break;
1838                 case SMB2_LEASE_READ|SMB2_LEASE_WRITE:
1839                         fsp->oplock_type = EXCLUSIVE_OPLOCK;
1840                         break;
1841                 case SMB2_LEASE_READ|SMB2_LEASE_HANDLE:
1842                 case SMB2_LEASE_READ:
1843                         fsp->oplock_type = LEVEL_II_OPLOCK;
1844                         break;
1845                 default:
1846                         fsp->oplock_type = NO_OPLOCK;
1847                         break;
1848                 }
1849
1850                 status = set_file_oplock(fsp);
1851                 if (!NT_STATUS_IS_OK(status)) {
1852                         /*
1853                          * Could not get the kernel oplock
1854                          */
1855                         fsp->oplock_type = NO_OPLOCK;
1856                 }
1857         }
1858
1859         ok = set_share_mode(lck, fsp, get_current_uid(fsp->conn),
1860                             req ? req->mid : 0,
1861                             fsp->oplock_type,
1862                             lease_idx);
1863         if (!ok) {
1864                 return NT_STATUS_NO_MEMORY;
1865         }
1866
1867         ok = update_num_read_oplocks(fsp, lck);
1868         if (!ok) {
1869                 del_share_mode(lck, fsp);
1870                 return NT_STATUS_INTERNAL_ERROR;
1871         }
1872
1873         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1874                   fsp->oplock_type, fsp_str_dbg(fsp)));
1875
1876         return NT_STATUS_OK;
1877 }
1878
1879 static bool request_timed_out(struct timeval request_time,
1880                               struct timeval timeout)
1881 {
1882         struct timeval now, end_time;
1883         GetTimeOfDay(&now);
1884         end_time = timeval_sum(&request_time, &timeout);
1885         return (timeval_compare(&end_time, &now) < 0);
1886 }
1887
1888 struct defer_open_state {
1889         struct smbXsrv_connection *xconn;
1890         uint64_t mid;
1891 };
1892
1893 static void defer_open_done(struct tevent_req *req);
1894
1895 /****************************************************************************
1896  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1897 ****************************************************************************/
1898
1899 static void defer_open(struct share_mode_lock *lck,
1900                        struct timeval request_time,
1901                        struct timeval timeout,
1902                        struct smb_request *req,
1903                        struct deferred_open_record *state)
1904 {
1905         struct deferred_open_record *open_rec;
1906
1907         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1908                   "open entry for mid %llu\n",
1909                   (unsigned int)request_time.tv_sec,
1910                   (unsigned int)request_time.tv_usec,
1911                   (unsigned long long)req->mid));
1912
1913         open_rec = talloc(NULL, struct deferred_open_record);
1914         if (open_rec == NULL) {
1915                 TALLOC_FREE(lck);
1916                 exit_server("talloc failed");
1917         }
1918
1919         *open_rec = *state;
1920
1921         if (lck) {
1922                 struct defer_open_state *watch_state;
1923                 struct tevent_req *watch_req;
1924                 bool ret;
1925
1926                 watch_state = talloc(open_rec, struct defer_open_state);
1927                 if (watch_state == NULL) {
1928                         exit_server("talloc failed");
1929                 }
1930                 watch_state->xconn = req->xconn;
1931                 watch_state->mid = req->mid;
1932
1933                 DEBUG(10, ("defering mid %llu\n",
1934                            (unsigned long long)req->mid));
1935
1936                 watch_req = dbwrap_record_watch_send(
1937                         watch_state, req->sconn->ev_ctx, lck->data->record,
1938                         req->sconn->msg_ctx);
1939                 if (watch_req == NULL) {
1940                         exit_server("Could not watch share mode record");
1941                 }
1942                 tevent_req_set_callback(watch_req, defer_open_done,
1943                                         watch_state);
1944
1945                 ret = tevent_req_set_endtime(
1946                         watch_req, req->sconn->ev_ctx,
1947                         timeval_sum(&request_time, &timeout));
1948                 SMB_ASSERT(ret);
1949         }
1950
1951         if (!push_deferred_open_message_smb(req, request_time, timeout,
1952                                             state->id, open_rec)) {
1953                 TALLOC_FREE(lck);
1954                 exit_server("push_deferred_open_message_smb failed");
1955         }
1956 }
1957
1958 static void defer_open_done(struct tevent_req *req)
1959 {
1960         struct defer_open_state *state = tevent_req_callback_data(
1961                 req, struct defer_open_state);
1962         NTSTATUS status;
1963         bool ret;
1964
1965         status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1966         TALLOC_FREE(req);
1967         if (!NT_STATUS_IS_OK(status)) {
1968                 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1969                           nt_errstr(status)));
1970                 /*
1971                  * Even if it failed, retry anyway. TODO: We need a way to
1972                  * tell a re-scheduled open about that error.
1973                  */
1974         }
1975
1976         DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1977
1978         ret = schedule_deferred_open_message_smb(state->xconn, state->mid);
1979         SMB_ASSERT(ret);
1980         TALLOC_FREE(state);
1981 }
1982
1983
1984 /****************************************************************************
1985  On overwrite open ensure that the attributes match.
1986 ****************************************************************************/
1987
1988 static bool open_match_attributes(connection_struct *conn,
1989                                   uint32_t old_dos_attr,
1990                                   uint32_t new_dos_attr,
1991                                   mode_t existing_unx_mode,
1992                                   mode_t new_unx_mode,
1993                                   mode_t *returned_unx_mode)
1994 {
1995         uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
1996
1997         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1998         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1999
2000         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2001            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2002                 *returned_unx_mode = new_unx_mode;
2003         } else {
2004                 *returned_unx_mode = (mode_t)0;
2005         }
2006
2007         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2008                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
2009                   "returned_unx_mode = 0%o\n",
2010                   (unsigned int)old_dos_attr,
2011                   (unsigned int)existing_unx_mode,
2012                   (unsigned int)new_dos_attr,
2013                   (unsigned int)*returned_unx_mode ));
2014
2015         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2016         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2017                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2018                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2019                         return False;
2020                 }
2021         }
2022         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2023                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2024                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2025                         return False;
2026                 }
2027         }
2028         return True;
2029 }
2030
2031 /****************************************************************************
2032  Special FCB or DOS processing in the case of a sharing violation.
2033  Try and find a duplicated file handle.
2034 ****************************************************************************/
2035
2036 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2037                                 connection_struct *conn,
2038                                 files_struct *fsp_to_dup_into,
2039                                 const struct smb_filename *smb_fname,
2040                                 struct file_id id,
2041                                 uint16_t file_pid,
2042                                 uint64_t vuid,
2043                                 uint32_t access_mask,
2044                                 uint32_t share_access,
2045                                 uint32_t create_options)
2046 {
2047         files_struct *fsp;
2048
2049         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2050                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
2051
2052         for(fsp = file_find_di_first(conn->sconn, id); fsp;
2053             fsp = file_find_di_next(fsp)) {
2054
2055                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2056                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
2057                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2058                           fsp->fh->fd, (unsigned long long)fsp->vuid,
2059                           (unsigned int)fsp->file_pid,
2060                           (unsigned int)fsp->fh->private_options,
2061                           (unsigned int)fsp->access_mask ));
2062
2063                 if (fsp != fsp_to_dup_into &&
2064                     fsp->fh->fd != -1 &&
2065                     fsp->vuid == vuid &&
2066                     fsp->file_pid == file_pid &&
2067                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2068                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2069                     (fsp->access_mask & FILE_WRITE_DATA) &&
2070                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2071                     strequal(fsp->fsp_name->stream_name,
2072                              smb_fname->stream_name)) {
2073                         DEBUG(10,("fcb_or_dos_open: file match\n"));
2074                         break;
2075                 }
2076         }
2077
2078         if (!fsp) {
2079                 return NT_STATUS_NOT_FOUND;
2080         }
2081
2082         /* quite an insane set of semantics ... */
2083         if (is_executable(smb_fname->base_name) &&
2084             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2085                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2086                 return NT_STATUS_INVALID_PARAMETER;
2087         }
2088
2089         /* We need to duplicate this fsp. */
2090         return dup_file_fsp(req, fsp, access_mask, share_access,
2091                             create_options, fsp_to_dup_into);
2092 }
2093
2094 static void schedule_defer_open(struct share_mode_lock *lck,
2095                                 struct file_id id,
2096                                 struct timeval request_time,
2097                                 struct smb_request *req)
2098 {
2099         struct deferred_open_record state;
2100
2101         /* This is a relative time, added to the absolute
2102            request_time value to get the absolute timeout time.
2103            Note that if this is the second or greater time we enter
2104            this codepath for this particular request mid then
2105            request_time is left as the absolute time of the *first*
2106            time this request mid was processed. This is what allows
2107            the request to eventually time out. */
2108
2109         struct timeval timeout;
2110
2111         /* Normally the smbd we asked should respond within
2112          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2113          * the client did, give twice the timeout as a safety
2114          * measure here in case the other smbd is stuck
2115          * somewhere else. */
2116
2117         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2118
2119         /* Nothing actually uses state.delayed_for_oplocks
2120            but it's handy to differentiate in debug messages
2121            between a 30 second delay due to oplock break, and
2122            a 1 second delay for share mode conflicts. */
2123
2124         state.delayed_for_oplocks = True;
2125         state.async_open = false;
2126         state.id = id;
2127
2128         if (!request_timed_out(request_time, timeout)) {
2129                 defer_open(lck, request_time, timeout, req, &state);
2130         }
2131 }
2132
2133 /****************************************************************************
2134  Reschedule an open call that went asynchronous.
2135 ****************************************************************************/
2136
2137 static void schedule_async_open(struct timeval request_time,
2138                                 struct smb_request *req)
2139 {
2140         struct deferred_open_record state;
2141         struct timeval timeout;
2142
2143         timeout = timeval_set(20, 0);
2144
2145         ZERO_STRUCT(state);
2146         state.delayed_for_oplocks = false;
2147         state.async_open = true;
2148
2149         if (!request_timed_out(request_time, timeout)) {
2150                 defer_open(NULL, request_time, timeout, req, &state);
2151         }
2152 }
2153
2154 /****************************************************************************
2155  Work out what access_mask to use from what the client sent us.
2156 ****************************************************************************/
2157
2158 static NTSTATUS smbd_calculate_maximum_allowed_access(
2159         connection_struct *conn,
2160         const struct smb_filename *smb_fname,
2161         bool use_privs,
2162         uint32_t *p_access_mask)
2163 {
2164         struct security_descriptor *sd;
2165         uint32_t access_granted;
2166         NTSTATUS status;
2167
2168         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2169                 *p_access_mask |= FILE_GENERIC_ALL;
2170                 return NT_STATUS_OK;
2171         }
2172
2173         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
2174                                     (SECINFO_OWNER |
2175                                      SECINFO_GROUP |
2176                                      SECINFO_DACL),
2177                                     talloc_tos(), &sd);
2178
2179         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2180                 /*
2181                  * File did not exist
2182                  */
2183                 *p_access_mask = FILE_GENERIC_ALL;
2184                 return NT_STATUS_OK;
2185         }
2186         if (!NT_STATUS_IS_OK(status)) {
2187                 DEBUG(10,("Could not get acl on file %s: %s\n",
2188                           smb_fname_str_dbg(smb_fname),
2189                           nt_errstr(status)));
2190                 return NT_STATUS_ACCESS_DENIED;
2191         }
2192
2193         /*
2194          * If we can access the path to this file, by
2195          * default we have FILE_READ_ATTRIBUTES from the
2196          * containing directory. See the section:
2197          * "Algorithm to Check Access to an Existing File"
2198          * in MS-FSA.pdf.
2199          *
2200          * se_file_access_check()
2201          * also takes care of owner WRITE_DAC and READ_CONTROL.
2202          */
2203         status = se_file_access_check(sd,
2204                                  get_current_nttok(conn),
2205                                  use_privs,
2206                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2207                                  &access_granted);
2208
2209         TALLOC_FREE(sd);
2210
2211         if (!NT_STATUS_IS_OK(status)) {
2212                 DEBUG(10, ("Access denied on file %s: "
2213                            "when calculating maximum access\n",
2214                            smb_fname_str_dbg(smb_fname)));
2215                 return NT_STATUS_ACCESS_DENIED;
2216         }
2217         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2218
2219         if (!(access_granted & DELETE_ACCESS)) {
2220                 if (can_delete_file_in_directory(conn, smb_fname)) {
2221                         *p_access_mask |= DELETE_ACCESS;
2222                 }
2223         }
2224
2225         return NT_STATUS_OK;
2226 }
2227
2228 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2229                                     const struct smb_filename *smb_fname,
2230                                     bool use_privs,
2231                                     uint32_t access_mask,
2232                                     uint32_t *access_mask_out)
2233 {
2234         NTSTATUS status;
2235         uint32_t orig_access_mask = access_mask;
2236         uint32_t rejected_share_access;
2237
2238         /*
2239          * Convert GENERIC bits to specific bits.
2240          */
2241
2242         se_map_generic(&access_mask, &file_generic_mapping);
2243
2244         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2245         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2246
2247                 status = smbd_calculate_maximum_allowed_access(
2248                         conn, smb_fname, use_privs, &access_mask);
2249
2250                 if (!NT_STATUS_IS_OK(status)) {
2251                         return status;
2252                 }
2253
2254                 access_mask &= conn->share_access;
2255         }
2256
2257         rejected_share_access = access_mask & ~(conn->share_access);
2258
2259         if (rejected_share_access) {
2260                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2261                         "file %s: rejected by share access mask[0x%08X] "
2262                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2263                         smb_fname_str_dbg(smb_fname),
2264                         conn->share_access,
2265                         orig_access_mask, access_mask,
2266                         rejected_share_access));
2267                 return NT_STATUS_ACCESS_DENIED;
2268         }
2269
2270         *access_mask_out = access_mask;
2271         return NT_STATUS_OK;
2272 }
2273
2274 /****************************************************************************
2275  Remove the deferred open entry under lock.
2276 ****************************************************************************/
2277
2278 /****************************************************************************
2279  Return true if this is a state pointer to an asynchronous create.
2280 ****************************************************************************/
2281
2282 bool is_deferred_open_async(const struct deferred_open_record *rec)
2283 {
2284         return rec->async_open;
2285 }
2286
2287 static bool clear_ads(uint32_t create_disposition)
2288 {
2289         bool ret = false;
2290
2291         switch (create_disposition) {
2292         case FILE_SUPERSEDE:
2293         case FILE_OVERWRITE_IF:
2294         case FILE_OVERWRITE:
2295                 ret = true;
2296                 break;
2297         default:
2298                 break;
2299         }
2300         return ret;
2301 }
2302
2303 static int disposition_to_open_flags(uint32_t create_disposition)
2304 {
2305         int ret = 0;
2306
2307         /*
2308          * Currently we're using FILE_SUPERSEDE as the same as
2309          * FILE_OVERWRITE_IF but they really are
2310          * different. FILE_SUPERSEDE deletes an existing file
2311          * (requiring delete access) then recreates it.
2312          */
2313
2314         switch (create_disposition) {
2315         case FILE_SUPERSEDE:
2316         case FILE_OVERWRITE_IF:
2317                 /*
2318                  * If file exists replace/overwrite. If file doesn't
2319                  * exist create.
2320                  */
2321                 ret = O_CREAT|O_TRUNC;
2322                 break;
2323
2324         case FILE_OPEN:
2325                 /*
2326                  * If file exists open. If file doesn't exist error.
2327                  */
2328                 ret = 0;
2329                 break;
2330
2331         case FILE_OVERWRITE:
2332                 /*
2333                  * If file exists overwrite. If file doesn't exist
2334                  * error.
2335                  */
2336                 ret = O_TRUNC;
2337                 break;
2338
2339         case FILE_CREATE:
2340                 /*
2341                  * If file exists error. If file doesn't exist create.
2342                  */
2343                 ret = O_CREAT|O_EXCL;
2344                 break;
2345
2346         case FILE_OPEN_IF:
2347                 /*
2348                  * If file exists open. If file doesn't exist create.
2349                  */
2350                 ret = O_CREAT;
2351                 break;
2352         }
2353         return ret;
2354 }
2355
2356 static int calculate_open_access_flags(uint32_t access_mask,
2357                                        uint32_t private_flags)
2358 {
2359         bool need_write, need_read;
2360
2361         /*
2362          * Note that we ignore the append flag as append does not
2363          * mean the same thing under DOS and Unix.
2364          */
2365
2366         need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
2367         if (!need_write) {
2368                 return O_RDONLY;
2369         }
2370
2371         /* DENY_DOS opens are always underlying read-write on the
2372            file handle, no matter what the requested access mask
2373            says. */
2374
2375         need_read =
2376                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2377                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
2378                                 FILE_READ_EA|FILE_EXECUTE));
2379
2380         if (!need_read) {
2381                 return O_WRONLY;
2382         }
2383         return O_RDWR;
2384 }
2385
2386 /****************************************************************************
2387  Open a file with a share mode. Passed in an already created files_struct *.
2388 ****************************************************************************/
2389
2390 static NTSTATUS open_file_ntcreate(connection_struct *conn,
2391                             struct smb_request *req,
2392                             uint32_t access_mask,               /* access bits (FILE_READ_DATA etc.) */
2393                             uint32_t share_access,      /* share constants (FILE_SHARE_READ etc) */
2394                             uint32_t create_disposition,        /* FILE_OPEN_IF etc. */
2395                             uint32_t create_options,    /* options such as delete on close. */
2396                             uint32_t new_dos_attributes,        /* attributes used for new file. */
2397                             int oplock_request,         /* internal Samba oplock codes. */
2398                             struct smb2_lease *lease,
2399                                                         /* Information (FILE_EXISTS etc.) */
2400                             uint32_t private_flags,     /* Samba specific flags. */
2401                             int *pinfo,
2402                             files_struct *fsp)
2403 {
2404         struct smb_filename *smb_fname = fsp->fsp_name;
2405         int flags=0;
2406         int flags2=0;
2407         bool file_existed = VALID_STAT(smb_fname->st);
2408         bool def_acl = False;
2409         bool posix_open = False;
2410         bool new_file_created = False;
2411         bool first_open_attempt = true;
2412         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
2413         mode_t new_unx_mode = (mode_t)0;
2414         mode_t unx_mode = (mode_t)0;
2415         int info;
2416         uint32_t existing_dos_attributes = 0;
2417         struct timeval request_time = timeval_zero();
2418         struct share_mode_lock *lck = NULL;
2419         uint32_t open_access_mask = access_mask;
2420         NTSTATUS status;
2421         char *parent_dir;
2422         SMB_STRUCT_STAT saved_stat = smb_fname->st;
2423         struct timespec old_write_time;
2424         struct file_id id;
2425
2426         if (conn->printer) {
2427                 /*
2428                  * Printers are handled completely differently.
2429                  * Most of the passed parameters are ignored.
2430                  */
2431
2432                 if (pinfo) {
2433                         *pinfo = FILE_WAS_CREATED;
2434                 }
2435
2436                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
2437                            smb_fname_str_dbg(smb_fname)));
2438
2439                 if (!req) {
2440                         DEBUG(0,("open_file_ntcreate: printer open without "
2441                                 "an SMB request!\n"));
2442                         return NT_STATUS_INTERNAL_ERROR;
2443                 }
2444
2445                 return print_spool_open(fsp, smb_fname->base_name,
2446                                         req->vuid);
2447         }
2448
2449         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2450                             NULL)) {
2451                 return NT_STATUS_NO_MEMORY;
2452         }
2453
2454         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2455                 posix_open = True;
2456                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2457                 new_dos_attributes = 0;
2458         } else {
2459                 /* Windows allows a new file to be created and
2460                    silently removes a FILE_ATTRIBUTE_DIRECTORY
2461                    sent by the client. Do the same. */
2462
2463                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2464
2465                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2466                  * created new. */
2467                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2468                                      smb_fname, parent_dir);
2469         }
2470
2471         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2472                    "access_mask=0x%x share_access=0x%x "
2473                    "create_disposition = 0x%x create_options=0x%x "
2474                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2475                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2476                    access_mask, share_access, create_disposition,
2477                    create_options, (unsigned int)unx_mode, oplock_request,
2478                    (unsigned int)private_flags));
2479
2480         if (req == NULL) {
2481                 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
2482                 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
2483         } else {
2484                 /* And req != NULL means no INTERNAL_OPEN_ONLY */
2485                 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
2486         }
2487
2488         /*
2489          * Only non-internal opens can be deferred at all
2490          */
2491
2492         if (req) {
2493                 struct deferred_open_record *open_rec;
2494                 if (get_deferred_open_message_state(req,
2495                                 &request_time,
2496                                 &open_rec)) {
2497                         /* Remember the absolute time of the original
2498                            request with this mid. We'll use it later to
2499                            see if this has timed out. */
2500
2501                         /* If it was an async create retry, the file
2502                            didn't exist. */
2503
2504                         if (is_deferred_open_async(open_rec)) {
2505                                 SET_STAT_INVALID(smb_fname->st);
2506                                 file_existed = false;
2507                         }
2508
2509                         /* Ensure we don't reprocess this message. */
2510                         remove_deferred_open_message_smb(req->xconn, req->mid);
2511
2512                         first_open_attempt = false;
2513                 }
2514         }
2515
2516         if (!posix_open) {
2517                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2518                 if (file_existed) {
2519                         existing_dos_attributes = dos_mode(conn, smb_fname);
2520                 }
2521         }
2522
2523         /* ignore any oplock requests if oplocks are disabled */
2524         if (!lp_oplocks(SNUM(conn)) ||
2525             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2526                 /* Mask off everything except the private Samba bits. */
2527                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2528         }
2529
2530         /* this is for OS/2 long file names - say we don't support them */
2531         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2532                 /* OS/2 Workplace shell fix may be main code stream in a later
2533                  * release. */
2534                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2535                          "supported.\n"));
2536                 if (use_nt_status()) {
2537                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2538                 }
2539                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2540         }
2541
2542         switch( create_disposition ) {
2543                 case FILE_OPEN:
2544                         /* If file exists open. If file doesn't exist error. */
2545                         if (!file_existed) {
2546                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2547                                          "requested for file %s and file "
2548                                          "doesn't exist.\n",
2549                                          smb_fname_str_dbg(smb_fname)));
2550                                 errno = ENOENT;
2551                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2552                         }
2553                         break;
2554
2555                 case FILE_OVERWRITE:
2556                         /* If file exists overwrite. If file doesn't exist
2557                          * error. */
2558                         if (!file_existed) {
2559                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2560                                          "requested for file %s and file "
2561                                          "doesn't exist.\n",
2562                                          smb_fname_str_dbg(smb_fname) ));
2563                                 errno = ENOENT;
2564                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2565                         }
2566                         break;
2567
2568                 case FILE_CREATE:
2569                         /* If file exists error. If file doesn't exist
2570                          * create. */
2571                         if (file_existed) {
2572                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2573                                          "requested for file %s and file "
2574                                          "already exists.\n",
2575                                          smb_fname_str_dbg(smb_fname)));
2576                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2577                                         errno = EISDIR;
2578                                 } else {
2579                                         errno = EEXIST;
2580                                 }
2581                                 return map_nt_error_from_unix(errno);
2582                         }
2583                         break;
2584
2585                 case FILE_SUPERSEDE:
2586                 case FILE_OVERWRITE_IF:
2587                 case FILE_OPEN_IF:
2588                         break;
2589                 default:
2590                         return NT_STATUS_INVALID_PARAMETER;
2591         }
2592
2593         flags2 = disposition_to_open_flags(create_disposition);
2594
2595         /* We only care about matching attributes on file exists and
2596          * overwrite. */
2597
2598         if (!posix_open && file_existed &&
2599             ((create_disposition == FILE_OVERWRITE) ||
2600              (create_disposition == FILE_OVERWRITE_IF))) {
2601                 if (!open_match_attributes(conn, existing_dos_attributes,
2602                                            new_dos_attributes,
2603                                            smb_fname->st.st_ex_mode,
2604                                            unx_mode, &new_unx_mode)) {
2605                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2606                                  "for file %s (%x %x) (0%o, 0%o)\n",
2607                                  smb_fname_str_dbg(smb_fname),
2608                                  existing_dos_attributes,
2609                                  new_dos_attributes,
2610                                  (unsigned int)smb_fname->st.st_ex_mode,
2611                                  (unsigned int)unx_mode ));
2612                         errno = EACCES;
2613                         return NT_STATUS_ACCESS_DENIED;
2614                 }
2615         }
2616
2617         status = smbd_calculate_access_mask(conn, smb_fname,
2618                                         false,
2619                                         access_mask,
2620                                         &access_mask);
2621         if (!NT_STATUS_IS_OK(status)) {
2622                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2623                         "on file %s returned %s\n",
2624                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2625                 return status;
2626         }
2627
2628         open_access_mask = access_mask;
2629
2630         if (flags2 & O_TRUNC) {
2631                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2632         }
2633
2634         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2635                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2636                     access_mask));
2637
2638         /*
2639          * Note that we ignore the append flag as append does not
2640          * mean the same thing under DOS and Unix.
2641          */
2642
2643         flags = calculate_open_access_flags(access_mask, private_flags);
2644
2645         /*
2646          * Currently we only look at FILE_WRITE_THROUGH for create options.
2647          */
2648
2649 #if defined(O_SYNC)
2650         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2651                 flags2 |= O_SYNC;
2652         }
2653 #endif /* O_SYNC */
2654
2655         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2656                 flags2 |= O_APPEND;
2657         }
2658
2659         if (!posix_open && !CAN_WRITE(conn)) {
2660                 /*
2661                  * We should really return a permission denied error if either
2662                  * O_CREAT or O_TRUNC are set, but for compatibility with
2663                  * older versions of Samba we just AND them out.
2664                  */
2665                 flags2 &= ~(O_CREAT|O_TRUNC);
2666         }
2667
2668         if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2669                 /*
2670                  * With kernel oplocks the open breaking an oplock
2671                  * blocks until the oplock holder has given up the
2672                  * oplock or closed the file. We prevent this by first
2673                  * trying to open the file with O_NONBLOCK (see "man
2674                  * fcntl" on Linux). For the second try, triggered by
2675                  * an oplock break response, we do not need this
2676                  * anymore.
2677                  *
2678                  * This is true under the assumption that only Samba
2679                  * requests kernel oplocks. Once someone else like
2680                  * NFSv4 starts to use that API, we will have to
2681                  * modify this by communicating with the NFSv4 server.
2682                  */
2683                 flags2 |= O_NONBLOCK;
2684         }
2685
2686         /*
2687          * Ensure we can't write on a read-only share or file.
2688          */
2689
2690         if (flags != O_RDONLY && file_existed &&
2691             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2692                 DEBUG(5,("open_file_ntcreate: write access requested for "
2693                          "file %s on read only %s\n",
2694                          smb_fname_str_dbg(smb_fname),
2695                          !CAN_WRITE(conn) ? "share" : "file" ));
2696                 errno = EACCES;
2697                 return NT_STATUS_ACCESS_DENIED;
2698         }
2699
2700         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2701         fsp->share_access = share_access;
2702         fsp->fh->private_options = private_flags;
2703         fsp->access_mask = open_access_mask; /* We change this to the
2704                                               * requested access_mask after
2705                                               * the open is done. */
2706         fsp->posix_open = posix_open;
2707
2708         if (timeval_is_zero(&request_time)) {
2709                 request_time = fsp->open_time;
2710         }
2711
2712         /*
2713          * Ensure we pay attention to default ACLs on directories if required.
2714          */
2715
2716         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2717             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2718                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2719         }
2720
2721         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2722                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2723                  (unsigned int)flags, (unsigned int)flags2,
2724                  (unsigned int)unx_mode, (unsigned int)access_mask,
2725                  (unsigned int)open_access_mask));
2726
2727         fsp_open = open_file(fsp, conn, req, parent_dir,
2728                              flags|flags2, unx_mode, access_mask,
2729                              open_access_mask, &new_file_created);
2730
2731         if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2732                 struct deferred_open_record state;
2733
2734                 /*
2735                  * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2736                  */
2737                 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2738                         DEBUG(10, ("FIFO busy\n"));
2739                         return NT_STATUS_NETWORK_BUSY;
2740                 }
2741                 if (req == NULL) {
2742                         DEBUG(10, ("Internal open busy\n"));
2743                         return NT_STATUS_NETWORK_BUSY;
2744                 }
2745
2746                 /*
2747                  * From here on we assume this is an oplock break triggered
2748                  */
2749
2750                 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2751                 if (lck == NULL) {
2752                         state.delayed_for_oplocks = false;
2753                         state.async_open = false;
2754                         state.id = fsp->file_id;
2755                         defer_open(NULL, request_time, timeval_set(0, 0),
2756                                    req, &state);
2757                         DEBUG(10, ("No share mode lock found after "
2758                                    "EWOULDBLOCK, retrying sync\n"));
2759                         return NT_STATUS_SHARING_VIOLATION;
2760                 }
2761
2762                 if (!validate_oplock_types(lck)) {
2763                         smb_panic("validate_oplock_types failed");
2764                 }
2765
2766                 if (delay_for_oplock(fsp, 0, lease, lck, false,
2767                                      create_disposition, first_open_attempt)) {
2768                         schedule_defer_open(lck, fsp->file_id, request_time,
2769                                             req);
2770                         TALLOC_FREE(lck);
2771                         DEBUG(10, ("Sent oplock break request to kernel "
2772                                    "oplock holder\n"));
2773                         return NT_STATUS_SHARING_VIOLATION;
2774                 }
2775
2776                 /*
2777                  * No oplock from Samba around. Immediately retry with
2778                  * a blocking open.
2779                  */
2780                 state.delayed_for_oplocks = false;
2781                 state.async_open = false;
2782                 state.id = fsp->file_id;
2783                 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2784                 TALLOC_FREE(lck);
2785                 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2786                            "Retrying sync\n"));
2787                 return NT_STATUS_SHARING_VIOLATION;
2788         }
2789
2790         if (!NT_STATUS_IS_OK(fsp_open)) {
2791                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2792                         schedule_async_open(request_time, req);
2793                 }
2794                 return fsp_open;
2795         }
2796
2797         if (new_file_created) {
2798                 /*
2799                  * As we atomically create using O_CREAT|O_EXCL,
2800                  * then if new_file_created is true, then
2801                  * file_existed *MUST* have been false (even
2802                  * if the file was previously detected as being
2803                  * there).
2804                  */
2805                 file_existed = false;
2806         }
2807
2808         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2809                 /*
2810                  * The file did exist, but some other (local or NFS)
2811                  * process either renamed/unlinked and re-created the
2812                  * file with different dev/ino after we walked the path,
2813                  * but before we did the open. We could retry the
2814                  * open but it's a rare enough case it's easier to
2815                  * just fail the open to prevent creating any problems
2816                  * in the open file db having the wrong dev/ino key.
2817                  */
2818                 fd_close(fsp);
2819                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2820                         "Old (dev=0x%llu, ino =0x%llu). "
2821                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2822                         " with NT_STATUS_ACCESS_DENIED.\n",
2823                          smb_fname_str_dbg(smb_fname),
2824                          (unsigned long long)saved_stat.st_ex_dev,
2825                          (unsigned long long)saved_stat.st_ex_ino,
2826                          (unsigned long long)smb_fname->st.st_ex_dev,
2827                          (unsigned long long)smb_fname->st.st_ex_ino));
2828                 return NT_STATUS_ACCESS_DENIED;
2829         }
2830
2831         old_write_time = smb_fname->st.st_ex_mtime;
2832
2833         /*
2834          * Deal with the race condition where two smbd's detect the
2835          * file doesn't exist and do the create at the same time. One
2836          * of them will win and set a share mode, the other (ie. this
2837          * one) should check if the requested share mode for this
2838          * create is allowed.
2839          */
2840
2841         /*
2842          * Now the file exists and fsp is successfully opened,
2843          * fsp->dev and fsp->inode are valid and should replace the
2844          * dev=0,inode=0 from a non existent file. Spotted by
2845          * Nadav Danieli <nadavd@exanet.com>. JRA.
2846          */
2847
2848         id = fsp->file_id;
2849
2850         lck = get_share_mode_lock(talloc_tos(), id,
2851                                   conn->connectpath,
2852                                   smb_fname, &old_write_time);
2853
2854         if (lck == NULL) {
2855                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2856                           "mode lock for %s\n",
2857                           smb_fname_str_dbg(smb_fname)));
2858                 fd_close(fsp);
2859                 return NT_STATUS_SHARING_VIOLATION;
2860         }
2861
2862         /* Get the types we need to examine. */
2863         if (!validate_oplock_types(lck)) {
2864                 smb_panic("validate_oplock_types failed");
2865         }
2866
2867         if (has_delete_on_close(lck, fsp->name_hash)) {
2868                 TALLOC_FREE(lck);
2869                 fd_close(fsp);
2870                 return NT_STATUS_DELETE_PENDING;
2871         }
2872
2873         status = open_mode_check(conn, lck,
2874                                  access_mask, share_access);
2875
2876         if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
2877             (lck->data->num_share_modes > 0)) {
2878                 /*
2879                  * This comes from ancient times out of open_mode_check. I
2880                  * have no clue whether this is still necessary. I can't think
2881                  * of a case where this would actually matter further down in
2882                  * this function. I leave it here for further investigation
2883                  * :-)
2884                  */
2885                 file_existed = true;
2886         }
2887
2888         if ((req != NULL) &&
2889             delay_for_oplock(
2890                     fsp, oplock_request, lease, lck,
2891                     NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION),
2892                     create_disposition, first_open_attempt)) {
2893                 schedule_defer_open(lck, fsp->file_id, request_time, req);
2894                 TALLOC_FREE(lck);
2895                 fd_close(fsp);
2896                 return NT_STATUS_SHARING_VIOLATION;
2897         }
2898
2899         if (!NT_STATUS_IS_OK(status)) {
2900                 uint32_t can_access_mask;
2901                 bool can_access = True;
2902
2903                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2904
2905                 /* Check if this can be done with the deny_dos and fcb
2906                  * calls. */
2907                 if (private_flags &
2908                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2909                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2910                         if (req == NULL) {
2911                                 DEBUG(0, ("DOS open without an SMB "
2912                                           "request!\n"));
2913                                 TALLOC_FREE(lck);
2914                                 fd_close(fsp);
2915                                 return NT_STATUS_INTERNAL_ERROR;
2916                         }
2917
2918                         /* Use the client requested access mask here,
2919                          * not the one we open with. */
2920                         status = fcb_or_dos_open(req,
2921                                                  conn,
2922                                                  fsp,
2923                                                  smb_fname,
2924                                                  id,
2925                                                  req->smbpid,
2926                                                  req->vuid,
2927                                                  access_mask,
2928                                                  share_access,
2929                                                  create_options);
2930
2931                         if (NT_STATUS_IS_OK(status)) {
2932                                 TALLOC_FREE(lck);
2933                                 if (pinfo) {
2934                                         *pinfo = FILE_WAS_OPENED;
2935                                 }
2936                                 return NT_STATUS_OK;
2937                         }
2938                 }
2939
2940                 /*
2941                  * This next line is a subtlety we need for
2942                  * MS-Access. If a file open will fail due to share
2943                  * permissions and also for security (access) reasons,
2944                  * we need to return the access failed error, not the
2945                  * share error. We can't open the file due to kernel
2946                  * oplock deadlock (it's possible we failed above on
2947                  * the open_mode_check()) so use a userspace check.
2948                  */
2949
2950                 if (flags & O_RDWR) {
2951                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2952                 } else if (flags & O_WRONLY) {
2953                         can_access_mask = FILE_WRITE_DATA;
2954                 } else {
2955                         can_access_mask = FILE_READ_DATA;
2956                 }
2957
2958                 if (((can_access_mask & FILE_WRITE_DATA) &&
2959                      !CAN_WRITE(conn)) ||
2960                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2961                                                               smb_fname,
2962                                                               false,
2963                                                               can_access_mask))) {
2964                         can_access = False;
2965                 }
2966
2967                 /*
2968                  * If we're returning a share violation, ensure we
2969                  * cope with the braindead 1 second delay (SMB1 only).
2970                  */
2971
2972                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2973                     !conn->sconn->using_smb2 &&
2974                     lp_defer_sharing_violations()) {
2975                         struct timeval timeout;
2976                         struct deferred_open_record state;
2977                         int timeout_usecs;
2978
2979                         /* this is a hack to speed up torture tests
2980                            in 'make test' */
2981                         timeout_usecs = lp_parm_int(SNUM(conn),
2982                                                     "smbd","sharedelay",
2983                                                     SHARING_VIOLATION_USEC_WAIT);
2984
2985                         /* This is a relative time, added to the absolute
2986                            request_time value to get the absolute timeout time.
2987                            Note that if this is the second or greater time we enter
2988                            this codepath for this particular request mid then
2989                            request_time is left as the absolute time of the *first*
2990                            time this request mid was processed. This is what allows
2991                            the request to eventually time out. */
2992
2993                         timeout = timeval_set(0, timeout_usecs);
2994
2995                         /* Nothing actually uses state.delayed_for_oplocks
2996                            but it's handy to differentiate in debug messages
2997                            between a 30 second delay due to oplock break, and
2998                            a 1 second delay for share mode conflicts. */
2999
3000                         state.delayed_for_oplocks = False;
3001                         state.async_open = false;
3002                         state.id = id;
3003
3004                         if ((req != NULL)
3005                             && !request_timed_out(request_time,
3006                                                   timeout)) {
3007                                 defer_open(lck, request_time, timeout,
3008                                            req, &state);
3009                         }
3010                 }
3011
3012                 TALLOC_FREE(lck);
3013                 fd_close(fsp);
3014                 if (can_access) {
3015                         /*
3016                          * We have detected a sharing violation here
3017                          * so return the correct error code
3018                          */
3019                         status = NT_STATUS_SHARING_VIOLATION;
3020                 } else {
3021                         status = NT_STATUS_ACCESS_DENIED;
3022                 }
3023                 return status;
3024         }
3025
3026         /* Should we atomically (to the client at least) truncate ? */
3027         if ((!new_file_created) &&
3028             (flags2 & O_TRUNC) &&
3029             (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3030                 int ret;
3031
3032                 ret = vfs_set_filelen(fsp, 0);
3033                 if (ret != 0) {
3034                         status = map_nt_error_from_unix(errno);
3035                         TALLOC_FREE(lck);
3036                         fd_close(fsp);
3037                         return status;
3038                 }
3039         }
3040
3041         /*
3042          * We have the share entry *locked*.....
3043          */
3044
3045         /* Delete streams if create_disposition requires it */
3046         if (!new_file_created && clear_ads(create_disposition) &&
3047             !is_ntfs_stream_smb_fname(smb_fname)) {
3048                 status = delete_all_streams(conn, smb_fname->base_name);
3049                 if (!NT_STATUS_IS_OK(status)) {
3050                         TALLOC_FREE(lck);
3051                         fd_close(fsp);
3052                         return status;
3053                 }
3054         }
3055
3056         /* note that we ignore failure for the following. It is
3057            basically a hack for NFS, and NFS will never set one of
3058            these only read them. Nobody but Samba can ever set a deny
3059            mode and we have already checked our more authoritative
3060            locking database for permission to set this deny mode. If
3061            the kernel refuses the operations then the kernel is wrong.
3062            note that GPFS supports it as well - jmcd */
3063
3064         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3065                 int ret_flock;
3066                 /*
3067                  * Beware: streams implementing VFS modules may
3068                  * implement streams in a way that fsp will have the
3069                  * basefile open in the fsp fd, so lacking a distinct
3070                  * fd for the stream kernel_flock will apply on the
3071                  * basefile which is wrong. The actual check is
3072                  * deffered to the VFS module implementing the
3073                  * kernel_flock call.
3074                  */
3075                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3076                 if(ret_flock == -1 ){
3077
3078                         TALLOC_FREE(lck);
3079                         fd_close(fsp);
3080
3081                         return NT_STATUS_SHARING_VIOLATION;
3082                 }
3083         }
3084
3085         /*
3086          * At this point onwards, we can guarantee that the share entry
3087          * is locked, whether we created the file or not, and that the
3088          * deny mode is compatible with all current opens.
3089          */
3090
3091         /*
3092          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3093          * but we don't have to store this - just ignore it on access check.
3094          */
3095         if (conn->sconn->using_smb2) {
3096                 /*
3097                  * SMB2 doesn't return it (according to Microsoft tests).
3098                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3099                  * File created with access = 0x7 (Read, Write, Delete)
3100                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3101                  */
3102                 fsp->access_mask = access_mask;
3103         } else {
3104                 /* But SMB1 does. */
3105                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3106         }
3107
3108         if (file_existed) {
3109                 /*
3110                  * stat opens on existing files don't get oplocks.
3111                  * They can get leases.
3112                  *
3113                  * Note that we check for stat open on the *open_access_mask*,
3114                  * i.e. the access mask we actually used to do the open,
3115                  * not the one the client asked for (which is in
3116                  * fsp->access_mask). This is due to the fact that
3117                  * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3118                  * which adds FILE_WRITE_DATA to open_access_mask.
3119                  */
3120                 if (is_stat_open(open_access_mask) && lease == NULL) {
3121                         oplock_request = NO_OPLOCK;
3122                 }
3123         }
3124
3125         if (new_file_created) {
3126                 info = FILE_WAS_CREATED;
3127         } else {
3128                 if (flags2 & O_TRUNC) {
3129                         info = FILE_WAS_OVERWRITTEN;
3130                 } else {
3131                         info = FILE_WAS_OPENED;
3132                 }
3133         }
3134
3135         if (pinfo) {
3136                 *pinfo = info;
3137         }
3138
3139         /*
3140          * Setup the oplock info in both the shared memory and
3141          * file structs.
3142          */
3143         status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3144         if (!NT_STATUS_IS_OK(status)) {
3145                 TALLOC_FREE(lck);
3146                 fd_close(fsp);
3147                 return status;
3148         }
3149
3150         /* Handle strange delete on close create semantics. */
3151         if (create_options & FILE_DELETE_ON_CLOSE) {
3152
3153                 status = can_set_delete_on_close(fsp, new_dos_attributes);
3154
3155                 if (!NT_STATUS_IS_OK(status)) {
3156                         /* Remember to delete the mode we just added. */
3157                         del_share_mode(lck, fsp);
3158                         TALLOC_FREE(lck);
3159                         fd_close(fsp);
3160                         return status;
3161                 }
3162                 /* Note that here we set the *inital* delete on close flag,
3163                    not the regular one. The magic gets handled in close. */
3164                 fsp->initial_delete_on_close = True;
3165         }
3166
3167         if (info != FILE_WAS_OPENED) {
3168                 /* Files should be initially set as archive */
3169                 if (lp_map_archive(SNUM(conn)) ||
3170                     lp_store_dos_attributes(SNUM(conn))) {
3171                         if (!posix_open) {
3172                                 if (file_set_dosmode(conn, smb_fname,
3173                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3174                                             parent_dir, true) == 0) {
3175                                         unx_mode = smb_fname->st.st_ex_mode;
3176                                 }
3177                         }
3178                 }
3179         }
3180
3181         /* Determine sparse flag. */
3182         if (posix_open) {
3183                 /* POSIX opens are sparse by default. */
3184                 fsp->is_sparse = true;
3185         } else {
3186                 fsp->is_sparse = (file_existed &&
3187                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3188         }
3189
3190         /*
3191          * Take care of inherited ACLs on created files - if default ACL not
3192          * selected.
3193          */
3194
3195         if (!posix_open && new_file_created && !def_acl) {
3196
3197                 int saved_errno = errno; /* We might get ENOSYS in the next
3198                                           * call.. */
3199
3200                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
3201                     errno == ENOSYS) {
3202                         errno = saved_errno; /* Ignore ENOSYS */
3203                 }
3204
3205         } else if (new_unx_mode) {
3206
3207                 int ret = -1;
3208
3209                 /* Attributes need changing. File already existed. */
3210
3211                 {
3212                         int saved_errno = errno; /* We might get ENOSYS in the
3213                                                   * next call.. */
3214                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
3215
3216                         if (ret == -1 && errno == ENOSYS) {
3217                                 errno = saved_errno; /* Ignore ENOSYS */
3218                         } else {
3219                                 DEBUG(5, ("open_file_ntcreate: reset "
3220                                           "attributes of file %s to 0%o\n",
3221                                           smb_fname_str_dbg(smb_fname),
3222                                           (unsigned int)new_unx_mode));
3223                                 ret = 0; /* Don't do the fchmod below. */
3224                         }
3225                 }
3226
3227                 if ((ret == -1) &&
3228                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
3229                         DEBUG(5, ("open_file_ntcreate: failed to reset "
3230                                   "attributes of file %s to 0%o\n",
3231                                   smb_fname_str_dbg(smb_fname),
3232                                   (unsigned int)new_unx_mode));
3233         }
3234
3235         {
3236                 /*
3237                  * Deal with other opens having a modified write time.
3238                  */
3239                 struct timespec write_time = get_share_mode_write_time(lck);
3240
3241                 if (!null_timespec(write_time)) {
3242                         update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3243                 }
3244         }
3245
3246         TALLOC_FREE(lck);
3247
3248         return NT_STATUS_OK;
3249 }
3250
3251 static NTSTATUS mkdir_internal(connection_struct *conn,
3252                                struct smb_filename *smb_dname,
3253                                uint32_t file_attributes)
3254 {
3255         mode_t mode;
3256         char *parent_dir = NULL;
3257         NTSTATUS status;
3258         bool posix_open = false;
3259         bool need_re_stat = false;
3260         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
3261
3262         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
3263                 DEBUG(5,("mkdir_internal: failing share access "
3264                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
3265                 return NT_STATUS_ACCESS_DENIED;
3266         }
3267
3268         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
3269                             NULL)) {
3270                 return NT_STATUS_NO_MEMORY;
3271         }
3272
3273         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3274                 posix_open = true;
3275                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3276         } else {
3277                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
3278         }
3279
3280         status = check_parent_access(conn,
3281                                         smb_dname,
3282                                         access_mask);
3283         if(!NT_STATUS_IS_OK(status)) {
3284                 DEBUG(5,("mkdir_internal: check_parent_access "
3285                         "on directory %s for path %s returned %s\n",
3286                         parent_dir,
3287                         smb_dname->base_name,
3288                         nt_errstr(status) ));
3289                 return status;
3290         }
3291
3292         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
3293                 return map_nt_error_from_unix(errno);
3294         }
3295
3296         /* Ensure we're checking for a symlink here.... */
3297         /* We don't want to get caught by a symlink racer. */
3298
3299         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3300                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3301                           smb_fname_str_dbg(smb_dname), strerror(errno)));
3302                 return map_nt_error_from_unix(errno);
3303         }
3304
3305         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
3306                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
3307                           smb_fname_str_dbg(smb_dname)));
3308                 return NT_STATUS_NOT_A_DIRECTORY;
3309         }
3310
3311         if (lp_store_dos_attributes(SNUM(conn))) {
3312                 if (!posix_open) {
3313                         file_set_dosmode(conn, smb_dname,
3314                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
3315                                          parent_dir, true);
3316                 }
3317         }
3318
3319         if (lp_inherit_permissions(SNUM(conn))) {
3320                 inherit_access_posix_acl(conn, parent_dir,
3321                                          smb_dname->base_name, mode);
3322                 need_re_stat = true;
3323         }
3324
3325         if (!posix_open) {
3326                 /*
3327                  * Check if high bits should have been set,
3328                  * then (if bits are missing): add them.
3329                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
3330                  * dir.
3331                  */
3332                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
3333                     (mode & ~smb_dname->st.st_ex_mode)) {
3334                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
3335                                       (smb_dname->st.st_ex_mode |
3336                                           (mode & ~smb_dname->st.st_ex_mode)));
3337                         need_re_stat = true;
3338                 }
3339         }
3340
3341         /* Change the owner if required. */
3342         if (lp_inherit_owner(SNUM(conn))) {
3343                 change_dir_owner_to_parent(conn, parent_dir,
3344                                            smb_dname->base_name,
3345                                            &smb_dname->st);
3346                 need_re_stat = true;
3347         }
3348
3349         if (need_re_stat) {
3350                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3351                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3352                           smb_fname_str_dbg(smb_dname), strerror(errno)));
3353                         return map_nt_error_from_unix(errno);
3354                 }
3355         }
3356
3357         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
3358                      smb_dname->base_name);
3359
3360         return NT_STATUS_OK;
3361 }
3362
3363 /****************************************************************************
3364  Open a directory from an NT SMB call.
3365 ****************************************************************************/
3366
3367 static NTSTATUS open_directory(connection_struct *conn,
3368                                struct smb_request *req,
3369                                struct smb_filename *smb_dname,
3370                                uint32_t access_mask,
3371                                uint32_t share_access,
3372                                uint32_t create_disposition,
3373                                uint32_t create_options,
3374                                uint32_t file_attributes,
3375                                int *pinfo,
3376                                files_struct **result)
3377 {
3378         files_struct *fsp = NULL;
3379         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
3380         struct share_mode_lock *lck = NULL;
3381         NTSTATUS status;
3382         struct timespec mtimespec;
3383         int info = 0;
3384         bool ok;
3385
3386         if (is_ntfs_stream_smb_fname(smb_dname)) {
3387                 DEBUG(2, ("open_directory: %s is a stream name!\n",
3388                           smb_fname_str_dbg(smb_dname)));
3389                 return NT_STATUS_NOT_A_DIRECTORY;
3390         }
3391
3392         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
3393                 /* Ensure we have a directory attribute. */
3394                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
3395         }
3396
3397         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
3398                  "share_access = 0x%x create_options = 0x%x, "
3399                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
3400                  smb_fname_str_dbg(smb_dname),
3401                  (unsigned int)access_mask,
3402                  (unsigned int)share_access,
3403                  (unsigned int)create_options,
3404                  (unsigned int)create_disposition,
3405                  (unsigned int)file_attributes));
3406
3407         status = smbd_calculate_access_mask(conn, smb_dname, false,
3408                                             access_mask, &access_mask);
3409         if (!NT_STATUS_IS_OK(status)) {
3410                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
3411                         "on file %s returned %s\n",
3412                         smb_fname_str_dbg(smb_dname),
3413                         nt_errstr(status)));
3414                 return status;
3415         }
3416
3417         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3418                         !security_token_has_privilege(get_current_nttok(conn),
3419                                         SEC_PRIV_SECURITY)) {
3420                 DEBUG(10, ("open_directory: open on %s "
3421                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3422                         smb_fname_str_dbg(smb_dname)));
3423                 return NT_STATUS_PRIVILEGE_NOT_HELD;
3424         }
3425
3426         switch( create_disposition ) {
3427                 case FILE_OPEN:
3428
3429                         if (!dir_existed) {
3430                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3431                         }
3432
3433                         info = FILE_WAS_OPENED;
3434                         break;
3435
3436                 case FILE_CREATE:
3437
3438                         /* If directory exists error. If directory doesn't
3439                          * exist create. */
3440
3441                         if (dir_existed) {
3442                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
3443                                 DEBUG(2, ("open_directory: unable to create "
3444                                           "%s. Error was %s\n",
3445                                           smb_fname_str_dbg(smb_dname),
3446                                           nt_errstr(status)));
3447                                 return status;
3448                         }
3449
3450                         status = mkdir_internal(conn, smb_dname,
3451                                                 file_attributes);
3452
3453                         if (!NT_STATUS_IS_OK(status)) {
3454                                 DEBUG(2, ("open_directory: unable to create "
3455                                           "%s. Error was %s\n",
3456                                           smb_fname_str_dbg(smb_dname),
3457                                           nt_errstr(status)));
3458                                 return status;
3459                         }
3460
3461                         info = FILE_WAS_CREATED;
3462                         break;
3463
3464                 case FILE_OPEN_IF:
3465                         /*
3466                          * If directory exists open. If directory doesn't
3467                          * exist create.
3468                          */
3469
3470                         if (dir_existed) {
3471                                 status = NT_STATUS_OK;
3472                                 info = FILE_WAS_OPENED;
3473                         } else {
3474                                 status = mkdir_internal(conn, smb_dname,
3475                                                 file_attributes);
3476
3477                                 if (NT_STATUS_IS_OK(status)) {
3478                                         info = FILE_WAS_CREATED;
3479                                 } else {
3480                                         /* Cope with create race. */
3481                                         if (!NT_STATUS_EQUAL(status,
3482                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3483                                                 DEBUG(2, ("open_directory: unable to create "
3484                                                         "%s. Error was %s\n",
3485                                                         smb_fname_str_dbg(smb_dname),
3486                                                         nt_errstr(status)));
3487                                                 return status;
3488                                         }
3489
3490                                         /*
3491                                          * If mkdir_internal() returned
3492                                          * NT_STATUS_OBJECT_NAME_COLLISION
3493                                          * we still must lstat the path.
3494                                          */
3495
3496                                         if (SMB_VFS_LSTAT(conn, smb_dname)
3497                                                         == -1) {
3498                                                 DEBUG(2, ("Could not stat "
3499                                                         "directory '%s' just "
3500                                                         "opened: %s\n",
3501                                                         smb_fname_str_dbg(
3502                                                                 smb_dname),
3503                                                         strerror(errno)));
3504                                                 return map_nt_error_from_unix(
3505                                                                 errno);
3506                                         }
3507
3508                                         info = FILE_WAS_OPENED;
3509                                 }
3510                         }
3511
3512                         break;
3513
3514                 case FILE_SUPERSEDE:
3515                 case FILE_OVERWRITE:
3516                 case FILE_OVERWRITE_IF:
3517                 default:
3518                         DEBUG(5,("open_directory: invalid create_disposition "
3519                                  "0x%x for directory %s\n",
3520                                  (unsigned int)create_disposition,
3521                                  smb_fname_str_dbg(smb_dname)));
3522                         return NT_STATUS_INVALID_PARAMETER;
3523         }
3524
3525         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3526                 DEBUG(5,("open_directory: %s is not a directory !\n",
3527                          smb_fname_str_dbg(smb_dname)));
3528                 return NT_STATUS_NOT_A_DIRECTORY;
3529         }
3530
3531         if (info == FILE_WAS_OPENED) {
3532                 status = smbd_check_access_rights(conn,
3533                                                 smb_dname,
3534                                                 false,
3535                                                 access_mask);
3536                 if (!NT_STATUS_IS_OK(status)) {
3537                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3538                                 "file %s failed with %s\n",
3539                                 smb_fname_str_dbg(smb_dname),
3540                                 nt_errstr(status)));
3541                         return status;
3542                 }
3543         }
3544
3545         status = file_new(req, conn, &fsp);
3546         if(!NT_STATUS_IS_OK(status)) {
3547                 return status;
3548         }
3549
3550         /*
3551          * Setup the files_struct for it.
3552          */
3553
3554         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3555         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3556         fsp->file_pid = req ? req->smbpid : 0;
3557         fsp->can_lock = False;
3558         fsp->can_read = False;
3559         fsp->can_write = False;
3560
3561         fsp->share_access = share_access;
3562         fsp->fh->private_options = 0;
3563         /*
3564          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3565          */
3566         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3567         fsp->print_file = NULL;
3568         fsp->modified = False;
3569         fsp->oplock_type = NO_OPLOCK;
3570         fsp->sent_oplock_break = NO_BREAK_SENT;
3571         fsp->is_directory = True;
3572         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3573         status = fsp_set_smb_fname(fsp, smb_dname);
3574         if (!NT_STATUS_IS_OK(status)) {
3575                 file_free(req, fsp);
3576                 return status;
3577         }
3578
3579         /* Don't store old timestamps for directory
3580            handles in the internal database. We don't
3581            update them in there if new objects
3582            are creaded in the directory. Currently
3583            we only update timestamps on file writes.
3584            See bug #9870.
3585         */
3586         ZERO_STRUCT(mtimespec);
3587
3588         if (access_mask & (FILE_LIST_DIRECTORY|
3589                            FILE_ADD_FILE|
3590                            FILE_ADD_SUBDIRECTORY|
3591                            FILE_TRAVERSE|
3592                            DELETE_ACCESS|
3593                            FILE_DELETE_CHILD)) {
3594 #ifdef O_DIRECTORY
3595                 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3596 #else
3597                 /* POSIX allows us to open a directory with O_RDONLY. */
3598                 status = fd_open(conn, fsp, O_RDONLY, 0);
3599 #endif
3600                 if (!NT_STATUS_IS_OK(status)) {
3601                         DEBUG(5, ("open_directory: Could not open fd for "
3602                                 "%s (%s)\n",
3603                                 smb_fname_str_dbg(smb_dname),
3604                                 nt_errstr(status)));
3605                         file_free(req, fsp);
3606                         return status;
3607                 }
3608         } else {
3609                 fsp->fh->fd = -1;
3610                 DEBUG(10, ("Not opening Directory %s\n",
3611                         smb_fname_str_dbg(smb_dname)));
3612         }
3613
3614         status = vfs_stat_fsp(fsp);
3615         if (!NT_STATUS_IS_OK(status)) {
3616                 fd_close(fsp);
3617                 file_free(req, fsp);
3618                 return status;
3619         }
3620
3621         /* Ensure there was no race condition. */
3622         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3623                 DEBUG(5,("open_directory: stat struct differs for "
3624                         "directory %s.\n",
3625                         smb_fname_str_dbg(smb_dname)));
3626                 fd_close(fsp);
3627                 file_free(req, fsp);
3628                 return NT_STATUS_ACCESS_DENIED;
3629         }
3630
3631         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3632                                   conn->connectpath, smb_dname,
3633                                   &mtimespec);
3634
3635         if (lck == NULL) {
3636                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3637                           "%s\n", smb_fname_str_dbg(smb_dname)));
3638                 fd_close(fsp);
3639                 file_free(req, fsp);
3640                 return NT_STATUS_SHARING_VIOLATION;
3641         }
3642
3643         if (has_delete_on_close(lck, fsp->name_hash)) {
3644                 TALLOC_FREE(lck);
3645                 fd_close(fsp);
3646                 file_free(req, fsp);
3647                 return NT_STATUS_DELETE_PENDING;
3648         }
3649
3650         status = open_mode_check(conn, lck,
3651                                  access_mask, share_access);
3652
3653         if (!NT_STATUS_IS_OK(status)) {
3654                 TALLOC_FREE(lck);
3655                 fd_close(fsp);
3656                 file_free(req, fsp);
3657                 return status;
3658         }
3659
3660         ok = set_share_mode(lck, fsp, get_current_uid(conn),
3661                             req ? req->mid : 0, NO_OPLOCK,
3662                             UINT32_MAX);
3663         if (!ok) {
3664                 TALLOC_FREE(lck);
3665                 fd_close(fsp);
3666                 file_free(req, fsp);
3667                 return NT_STATUS_NO_MEMORY;
3668         }
3669
3670         /* For directories the delete on close bit at open time seems
3671            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3672         if (create_options & FILE_DELETE_ON_CLOSE) {
3673                 status = can_set_delete_on_close(fsp, 0);
3674                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3675                         del_share_mode(lck, fsp);
3676                         TALLOC_FREE(lck);
3677                         fd_close(fsp);
3678                         file_free(req, fsp);
3679                         return status;
3680                 }
3681
3682                 if (NT_STATUS_IS_OK(status)) {
3683                         /* Note that here we set the *inital* delete on close flag,
3684                            not the regular one. The magic gets handled in close. */
3685                         fsp->initial_delete_on_close = True;
3686                 }
3687         }
3688
3689         {
3690                 /*
3691                  * Deal with other opens having a modified write time. Is this
3692                  * possible for directories?
3693                  */
3694                 struct timespec write_time = get_share_mode_write_time(lck);
3695
3696                 if (!null_timespec(write_time)) {
3697                         update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3698                 }
3699         }
3700
3701         TALLOC_FREE(lck);
3702
3703         if (pinfo) {
3704                 *pinfo = info;
3705         }
3706
3707         *result = fsp;
3708         return NT_STATUS_OK;
3709 }
3710
3711 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3712                           struct smb_filename *smb_dname)
3713 {
3714         NTSTATUS status;
3715         files_struct *fsp;
3716
3717         status = SMB_VFS_CREATE_FILE(
3718                 conn,                                   /* conn */
3719                 req,                                    /* req */
3720                 0,                                      /* root_dir_fid */
3721                 smb_dname,                              /* fname */
3722                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3723                 FILE_SHARE_NONE,                        /* share_access */
3724                 FILE_CREATE,                            /* create_disposition*/
3725                 FILE_DIRECTORY_FILE,                    /* create_options */
3726                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3727                 0,                                      /* oplock_request */
3728                 NULL,                                   /* lease */
3729                 0,                                      /* allocation_size */
3730                 0,                                      /* private_flags */
3731                 NULL,                                   /* sd */
3732                 NULL,                                   /* ea_list */
3733                 &fsp,                                   /* result */
3734                 NULL,                                   /* pinfo */
3735                 NULL, NULL);                            /* create context */
3736
3737         if (NT_STATUS_IS_OK(status)) {
3738                 close_file(req, fsp, NORMAL_CLOSE);
3739         }
3740
3741         return status;
3742 }
3743
3744 /****************************************************************************
3745  Receive notification that one of our open files has been renamed by another
3746  smbd process.
3747 ****************************************************************************/
3748
3749 void msg_file_was_renamed(struct messaging_context *msg,
3750                           void *private_data,
3751                           uint32_t msg_type,
3752                           struct server_id server_id,
3753                           DATA_BLOB *data)
3754 {
3755         files_struct *fsp;
3756         char *frm = (char *)data->data;
3757         struct file_id id;
3758         const char *sharepath;
3759         const char *base_name;
3760         const char *stream_name;
3761         struct smb_filename *smb_fname = NULL;
3762         size_t sp_len, bn_len;
3763         NTSTATUS status;
3764         struct smbd_server_connection *sconn =
3765                 talloc_get_type_abort(private_data,
3766                 struct smbd_server_connection);
3767
3768         if (data->data == NULL
3769             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3770                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3771                           (int)data->length));
3772                 return;
3773         }
3774
3775         /* Unpack the message. */
3776         pull_file_id_24(frm, &id);
3777         sharepath = &frm[24];
3778         sp_len = strlen(sharepath);
3779         base_name = sharepath + sp_len + 1;
3780         bn_len = strlen(base_name);
3781         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3782
3783         /* stream_name must always be NULL if there is no stream. */
3784         if (stream_name[0] == '\0') {
3785                 stream_name = NULL;
3786         }
3787
3788         smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3789                                         stream_name, NULL);
3790         if (smb_fname == NULL) {
3791                 return;
3792         }
3793
3794         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3795                 "file_id %s\n",
3796                 sharepath, smb_fname_str_dbg(smb_fname),
3797                 file_id_string_tos(&id)));
3798
3799         for(fsp = file_find_di_first(sconn, id); fsp;
3800             fsp = file_find_di_next(fsp)) {
3801                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3802
3803                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3804                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3805                                 smb_fname_str_dbg(smb_fname)));
3806                         status = fsp_set_smb_fname(fsp, smb_fname);
3807                         if (!NT_STATUS_IS_OK(status)) {
3808                                 goto out;
3809                         }
3810                 } else {
3811                         /* TODO. JRA. */
3812                         /* Now we have the complete path we can work out if this is
3813                            actually within this share and adjust newname accordingly. */
3814                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3815                                 "not sharepath %s) "
3816                                 "%s from %s -> %s\n",
3817                                 fsp->conn->connectpath,
3818                                 sharepath,
3819                                 fsp_fnum_dbg(fsp),
3820                                 fsp_str_dbg(fsp),
3821                                 smb_fname_str_dbg(smb_fname)));
3822                 }
3823         }
3824  out:
3825         TALLOC_FREE(smb_fname);
3826         return;
3827 }
3828
3829 /*
3830  * If a main file is opened for delete, all streams need to be checked for
3831  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3832  * If that works, delete them all by setting the delete on close and close.
3833  */
3834
3835 NTSTATUS open_streams_for_delete(connection_struct *conn,
3836                                         const char *fname)
3837 {
3838         struct stream_struct *stream_info = NULL;
3839         files_struct **streams = NULL;
3840         int i;
3841         unsigned int num_streams = 0;
3842         TALLOC_CTX *frame = talloc_stackframe();
3843         NTSTATUS status;
3844
3845         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3846                                 &num_streams, &stream_info);
3847
3848         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3849             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3850                 DEBUG(10, ("no streams around\n"));
3851                 TALLOC_FREE(frame);
3852                 return NT_STATUS_OK;
3853         }
3854
3855         if (!NT_STATUS_IS_OK(status)) {
3856                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3857                            nt_errstr(status)));
3858                 goto fail;
3859         }
3860
3861         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3862                    num_streams));
3863
3864         if (num_streams == 0) {
3865                 TALLOC_FREE(frame);
3866                 return NT_STATUS_OK;
3867         }
3868
3869         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3870         if (streams == NULL) {
3871                 DEBUG(0, ("talloc failed\n"));
3872                 status = NT_STATUS_NO_MEMORY;
3873                 goto fail;
3874         }
3875
3876         for (i=0; i<num_streams; i++) {
3877                 struct smb_filename *smb_fname;
3878
3879                 if (strequal(stream_info[i].name, "::$DATA")) {
3880                         streams[i] = NULL;
3881                         continue;
3882                 }
3883
3884                 smb_fname = synthetic_smb_fname(
3885                         talloc_tos(), fname, stream_info[i].name, NULL);
3886                 if (smb_fname == NULL) {
3887                         status = NT_STATUS_NO_MEMORY;
3888                         goto fail;
3889                 }
3890
3891                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3892                         DEBUG(10, ("Unable to stat stream: %s\n",
3893                                    smb_fname_str_dbg(smb_fname)));
3894                 }
3895
3896                 status = SMB_VFS_CREATE_FILE(
3897                          conn,                  /* conn */
3898                          NULL,                  /* req */
3899                          0,                     /* root_dir_fid */
3900                          smb_fname,             /* fname */
3901                          DELETE_ACCESS,         /* access_mask */
3902                          (FILE_SHARE_READ |     /* share_access */
3903                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3904                          FILE_OPEN,             /* create_disposition*/
3905                          0,                     /* create_options */
3906                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3907                          0,                     /* oplock_request */
3908                          NULL,                  /* lease */
3909                          0,                     /* allocation_size */
3910                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3911                          NULL,                  /* sd */
3912                          NULL,                  /* ea_list */
3913                          &streams[i],           /* result */
3914                          NULL,                  /* pinfo */
3915                          NULL, NULL);           /* create context */
3916
3917                 if (!NT_STATUS_IS_OK(status)) {
3918                         DEBUG(10, ("Could not open stream %s: %s\n",
3919                                    smb_fname_str_dbg(smb_fname),
3920                                    nt_errstr(status)));
3921
3922                         TALLOC_FREE(smb_fname);
3923                         break;
3924                 }
3925                 TALLOC_FREE(smb_fname);
3926         }
3927
3928         /*
3929          * don't touch the variable "status" beyond this point :-)
3930          */
3931
3932         for (i -= 1 ; i >= 0; i--) {
3933                 if (streams[i] == NULL) {
3934                         continue;
3935                 }
3936
3937                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3938                            fsp_str_dbg(streams[i])));
3939                 close_file(NULL, streams[i], NORMAL_CLOSE);
3940         }
3941
3942  fail:
3943         TALLOC_FREE(frame);
3944         return status;
3945 }
3946
3947 /*********************************************************************
3948  Create a default ACL by inheriting from the parent. If no inheritance
3949  from the parent available, don't set anything. This will leave the actual
3950  permissions the new file or directory already got from the filesystem
3951  as the NT ACL when read.
3952 *********************************************************************/
3953
3954 static NTSTATUS inherit_new_acl(files_struct *fsp)
3955 {
3956         TALLOC_CTX *frame = talloc_stackframe();
3957         char *parent_name = NULL;
3958         struct security_descriptor *parent_desc = NULL;
3959         NTSTATUS status = NT_STATUS_OK;
3960         struct security_descriptor *psd = NULL;
3961         const struct dom_sid *owner_sid = NULL;
3962         const struct dom_sid *group_sid = NULL;
3963         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3964         struct security_token *token = fsp->conn->session_info->security_token;
3965         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3966         bool inheritable_components = false;
3967         bool try_builtin_administrators = false;
3968         const struct dom_sid *BA_U_sid = NULL;
3969         const struct dom_sid *BA_G_sid = NULL;
3970         bool try_system = false;
3971         const struct dom_sid *SY_U_sid = NULL;
3972         const struct dom_sid *SY_G_sid = NULL;
3973         size_t size = 0;
3974
3975         if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3976                 TALLOC_FREE(frame);
3977                 return NT_STATUS_NO_MEMORY;
3978         }
3979
3980         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3981                                     parent_name,
3982                                     (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3983                                     frame,
3984                                     &parent_desc);
3985         if (!NT_STATUS_IS_OK(status)) {
3986                 TALLOC_FREE(frame);
3987                 return status;
3988         }
3989
3990         inheritable_components = sd_has_inheritable_components(parent_desc,
3991                                         fsp->is_directory);
3992
3993         if (!inheritable_components && !inherit_owner) {
3994                 TALLOC_FREE(frame);
3995                 /* Nothing to inherit and not setting owner. */
3996                 return NT_STATUS_OK;
3997         }
3998
3999         /* Create an inherited descriptor from the parent. */
4000
4001         if (DEBUGLEVEL >= 10) {
4002                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4003                         fsp_str_dbg(fsp) ));
4004                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4005         }
4006
4007         /* Inherit from parent descriptor if "inherit owner" set. */
4008         if (inherit_owner) {
4009                 owner_sid = parent_desc->owner_sid;
4010                 group_sid = parent_desc->group_sid;
4011         }
4012
4013         if (owner_sid == NULL) {
4014                 if (security_token_has_builtin_administrators(token)) {
4015                         try_builtin_administrators = true;
4016                 } else if (security_token_is_system(token)) {
4017                         try_builtin_administrators = true;
4018                         try_system = true;
4019                 }
4020         }
4021
4022         if (group_sid == NULL &&
4023             token->num_sids == PRIMARY_GROUP_SID_INDEX)
4024         {
4025                 if (security_token_is_system(token)) {
4026                         try_builtin_administrators = true;
4027                         try_system = true;
4028                 }
4029         }
4030
4031         if (try_builtin_administrators) {
4032                 struct unixid ids;
4033                 bool ok;
4034
4035                 ZERO_STRUCT(ids);
4036                 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4037                 if (ok) {
4038                         switch (ids.type) {
4039                         case ID_TYPE_BOTH:
4040                                 BA_U_sid = &global_sid_Builtin_Administrators;
4041                                 BA_G_sid = &global_sid_Builtin_Administrators;
4042                                 break;
4043                         case ID_TYPE_UID:
4044                                 BA_U_sid = &global_sid_Builtin_Administrators;
4045                                 break;
4046                         case ID_TYPE_GID:
4047                                 BA_G_sid = &global_sid_Builtin_Administrators;
4048                                 break;
4049                         default:
4050                                 break;
4051                         }
4052                 }
4053         }
4054
4055         if (try_system) {
4056                 struct unixid ids;
4057                 bool ok;
4058
4059                 ZERO_STRUCT(ids);
4060                 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4061                 if (ok) {
4062                         switch (ids.type) {
4063                         case ID_TYPE_BOTH:
4064                                 SY_U_sid = &global_sid_System;
4065                                 SY_G_sid = &global_sid_System;
4066                                 break;
4067                         case ID_TYPE_UID:
4068                                 SY_U_sid = &global_sid_System;
4069                                 break;
4070                         case ID_TYPE_GID:
4071                                 SY_G_sid = &global_sid_System;
4072                                 break;
4073                         default:
4074                                 break;
4075                         }
4076                 }
4077         }
4078
4079         if (owner_sid == NULL) {
4080                 owner_sid = BA_U_sid;
4081         }
4082
4083         if (owner_sid == NULL) {
4084                 owner_sid = SY_U_sid;
4085         }
4086
4087         if (group_sid == NULL) {
4088                 group_sid = SY_G_sid;
4089         }
4090
4091         if (try_system && group_sid == NULL) {
4092                 group_sid = BA_G_sid;
4093         }
4094
4095         if (owner_sid == NULL) {
4096                 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4097         }
4098         if (group_sid == NULL) {
4099                 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4100                         group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4101                 } else {
4102                         group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4103                 }
4104         }
4105
4106         status = se_create_child_secdesc(frame,
4107                         &psd,
4108                         &size,
4109                         parent_desc,
4110                         owner_sid,
4111                         group_sid,
4112                         fsp->is_directory);
4113         if (!NT_STATUS_IS_OK(status)) {
4114                 TALLOC_FREE(frame);
4115                 return status;
4116         }
4117
4118         /* If inheritable_components == false,
4119            se_create_child_secdesc()
4120            creates a security desriptor with a NULL dacl
4121            entry, but with SEC_DESC_DACL_PRESENT. We need
4122            to remove that flag. */
4123
4124         if (!inheritable_components) {
4125                 security_info_sent &= ~SECINFO_DACL;
4126                 psd->type &= ~SEC_DESC_DACL_PRESENT;
4127         }
4128
4129         if (DEBUGLEVEL >= 10) {
4130                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4131                         fsp_str_dbg(fsp) ));
4132                 NDR_PRINT_DEBUG(security_descriptor, psd);
4133         }
4134
4135         if (inherit_owner) {
4136                 /* We need to be root to force this. */
4137                 become_root();
4138         }
4139         status = SMB_VFS_FSET_NT_ACL(fsp,
4140                         security_info_sent,
4141                         psd);
4142         if (inherit_owner) {
4143                 unbecome_root();
4144         }
4145         TALLOC_FREE(frame);
4146         return status;
4147 }
4148
4149 /*
4150  * If we already have a lease, it must match the new file id. [MS-SMB2]
4151  * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4152  * used for a different file name.
4153  */
4154
4155 struct lease_match_state {
4156         /* Input parameters. */
4157         TALLOC_CTX *mem_ctx;
4158         const char *servicepath;
4159         const struct smb_filename *fname;
4160         bool file_existed;
4161         struct file_id id;
4162         /* Return parameters. */
4163         uint32_t num_file_ids;
4164         struct file_id *ids;
4165         NTSTATUS match_status;
4166 };
4167
4168 /*************************************************************
4169  File doesn't exist but this lease key+guid is already in use.
4170
4171  This is only allowable in the dynamic share case where the
4172  service path must be different.
4173
4174  There is a small race condition here in the multi-connection
4175  case where a client sends two create calls on different connections,
4176  where the file doesn't exist and one smbd creates the leases_db
4177  entry first, but this will get fixed by the multichannel cleanup
4178  when all identical client_guids get handled by a single smbd.
4179 **************************************************************/
4180
4181 static void lease_match_parser_new_file(
4182         uint32_t num_files,
4183         const struct leases_db_file *files,
4184         struct lease_match_state *state)
4185 {
4186         uint32_t i;
4187
4188         for (i = 0; i < num_files; i++) {
4189                 const struct leases_db_file *f = &files[i];
4190                 if (strequal(state->servicepath, f->servicepath)) {
4191                         state->match_status = NT_STATUS_INVALID_PARAMETER;
4192                         return;
4193                 }
4194         }
4195
4196         /* Dynamic share case. Break leases on all other files. */
4197         state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4198                                         num_files,
4199                                         files,
4200                                         &state->ids);
4201         if (!NT_STATUS_IS_OK(state->match_status)) {
4202                 return;
4203         }
4204
4205         state->num_file_ids = num_files;
4206         state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4207         return;
4208 }
4209
4210 static void lease_match_parser(
4211         uint32_t num_files,
4212         const struct leases_db_file *files,
4213         void *private_data)
4214 {
4215         struct lease_match_state *state =
4216                 (struct lease_match_state *)private_data;
4217         uint32_t i;
4218
4219         if (!state->file_existed) {
4220                 /*
4221                  * Deal with name mismatch or
4222                  * possible dynamic share case separately
4223                  * to make code clearer.
4224                  */
4225                 lease_match_parser_new_file(num_files,
4226                                                 files,
4227                                                 state);
4228                 return;
4229         }
4230
4231         /* File existed. */
4232         state->match_status = NT_STATUS_OK;
4233
4234         for (i = 0; i < num_files; i++) {
4235                 const struct leases_db_file *f = &files[i];
4236
4237                 /* Everything should be the same. */
4238                 if (!file_id_equal(&state->id, &f->id)) {
4239                         /* This should catch all dynamic share cases. */
4240                         state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4241                         break;
4242                 }
4243                 if (!strequal(f->servicepath, state->servicepath)) {
4244                         state->match_status = NT_STATUS_INVALID_PARAMETER;
4245                         break;
4246                 }
4247                 if (!strequal(f->base_name, state->fname->base_name)) {
4248                         state->match_status = NT_STATUS_INVALID_PARAMETER;
4249                         break;
4250                 }
4251                 if (!strequal(f->stream_name, state->fname->stream_name)) {
4252                         state->match_status = NT_STATUS_INVALID_PARAMETER;
4253                         break;
4254                 }
4255         }
4256
4257         if (NT_STATUS_IS_OK(state->match_status)) {
4258                 /*
4259                  * Common case - just opening another handle on a
4260                  * file on a non-dynamic share.
4261                  */
4262                 return;
4263         }
4264
4265         if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
4266                 /* Mismatched path. Error back to client. */
4267                 return;
4268         }
4269
4270         /*
4271          * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
4272          * Don't allow leases.
4273          */
4274
4275         state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4276                                         num_files,
4277                                         files,
4278                                         &state->ids);
4279         if (!NT_STATUS_IS_OK(state->match_status)) {
4280                 return;
4281         }
4282
4283         state->num_file_ids = num_files;
4284         state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4285         return;
4286 }
4287
4288 static NTSTATUS lease_match(connection_struct *conn,
4289                             struct smb_request *req,
4290                             struct smb2_lease_key *lease_key,
4291                             const char *servicepath,
4292                             const struct smb_filename *fname,
4293                             uint16_t *p_version,
4294                             uint16_t *p_epoch)
4295 {
4296         struct smbd_server_connection *sconn = req->sconn;
4297         TALLOC_CTX *tos = talloc_tos();
4298         struct lease_match_state state = {
4299                 .mem_ctx = tos,
4300                 .servicepath = servicepath,
4301                 .fname = fname,
4302                 .match_status = NT_STATUS_OK
4303         };
4304         uint32_t i;
4305         NTSTATUS status;
4306
4307         state.file_existed = VALID_STAT(fname->st);
4308         if (state.file_existed) {
4309                 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
4310         } else {
4311                 memset(&state.id, '\0', sizeof(state.id));
4312         }
4313
4314         status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
4315                                  lease_key, lease_match_parser, &state);
4316         if (!NT_STATUS_IS_OK(status)) {
4317                 /*
4318                  * Not found or error means okay: We can make the lease pass
4319                  */
4320                 return NT_STATUS_OK;
4321         }
4322         if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4323                 /*
4324                  * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
4325                  * deal with it.
4326                  */
4327                 return state.match_status;
4328         }
4329
4330         /* We have to break all existing leases. */
4331         for (i = 0; i < state.num_file_ids; i++) {
4332                 struct share_mode_lock *lck;
4333                 struct share_mode_data *d;
4334                 uint32_t j;
4335
4336                 if (file_id_equal(&state.ids[i], &state.id)) {
4337                         /* Don't need to break our own file. */
4338                         continue;
4339                 }
4340
4341                 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
4342                 if (lck == NULL) {
4343                         /* Race condition - file already closed. */
4344                         continue;
4345                 }
4346                 d = lck->data;
4347                 for (j=0; j<d->num_share_modes; j++) {
4348                         struct share_mode_entry *e = &d->share_modes[j];
4349                         uint32_t e_lease_type = get_lease_type(d, e);
4350                         struct share_mode_lease *l = NULL;
4351
4352                         if (share_mode_stale_pid(d, j)) {
4353                                 continue;
4354                         }
4355
4356                         if (e->op_type == LEASE_OPLOCK) {
4357                                 l = &lck->data->leases[e->lease_idx];
4358                                 if (!smb2_lease_key_equal(&l->lease_key,
4359                                                           lease_key)) {
4360                                         continue;
4361                                 }
4362                                 *p_epoch = l->epoch;
4363                                 *p_version = l->lease_version;
4364                         }
4365
4366                         if (e_lease_type == SMB2_LEASE_NONE) {
4367                                 continue;
4368                         }
4369
4370                         send_break_message(conn->sconn->msg_ctx, e,
4371                                            SMB2_LEASE_NONE);
4372
4373                         /*
4374                          * Windows 7 and 8 lease clients
4375                          * are broken in that they will not
4376                          * respond to lease break requests
4377                          * whilst waiting for an outstanding
4378                          * open request on that lease handle
4379                          * on the same TCP connection, due
4380                          * to holding an internal inode lock.
4381                          *
4382                          * This means we can't reschedule
4383                          * ourselves here, but must return
4384                          * from the create.
4385                          *
4386                          * Work around:
4387                          *
4388                          * Send the breaks and then return
4389                          * SMB2_LEASE_NONE in the lease handle
4390                          * to cause them to acknowledge the
4391                          * lease break. Consulatation with
4392                          * Microsoft engineering confirmed
4393                          * this approach is safe.
4394                          */
4395
4396                 }
4397                 TALLOC_FREE(lck);
4398         }
4399         /*
4400          * Ensure we don't grant anything more so we
4401          * never upgrade.
4402          */
4403         return NT_STATUS_OPLOCK_NOT_GRANTED;
4404 }
4405
4406 /*
4407  * Wrapper around open_file_ntcreate and open_directory
4408  */
4409
4410 static NTSTATUS create_file_unixpath(connection_struct *conn,
4411                                      struct smb_request *req,
4412                                      struct smb_filename *smb_fname,
4413                                      uint32_t access_mask,
4414                                      uint32_t share_access,
4415                                      uint32_t create_disposition,
4416                                      uint32_t create_options,
4417                                      uint32_t file_attributes,
4418                                      uint32_t oplock_request,
4419                                      struct smb2_lease *lease,
4420                                      uint64_t allocation_size,
4421                                      uint32_t private_flags,
4422                                      struct security_descriptor *sd,
4423                                      struct ea_list *ea_list,
4424
4425                                      files_struct **result,
4426                                      int *pinfo)
4427 {
4428         int info = FILE_WAS_OPENED;
4429         files_struct *base_fsp = NULL;
4430         files_struct *fsp = NULL;
4431         NTSTATUS status;
4432
4433         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
4434                   "file_attributes = 0x%x, share_access = 0x%x, "
4435                   "create_disposition = 0x%x create_options = 0x%x "
4436                   "oplock_request = 0x%x private_flags = 0x%x "
4437                   "ea_list = 0x%p, sd = 0x%p, "
4438                   "fname = %s\n",
4439                   (unsigned int)access_mask,
4440                   (unsigned int)file_attributes,
4441                   (unsigned int)share_access,
4442                   (unsigned int)create_disposition,
4443                   (unsigned int)create_options,
4444                   (unsigned int)oplock_request,
4445                   (unsigned int)private_flags,
4446                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4447
4448         if (create_options & FILE_OPEN_BY_FILE_ID) {
4449                 status = NT_STATUS_NOT_SUPPORTED;
4450                 goto fail;
4451         }
4452
4453         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
4454                 status = NT_STATUS_INVALID_PARAMETER;
4455                 goto fail;
4456         }
4457
4458         if (req == NULL) {
4459                 oplock_request |= INTERNAL_OPEN_ONLY;
4460         }
4461
4462         if (lease != NULL) {
4463                 uint16_t epoch = lease->lease_epoch;
4464                 uint16_t version = lease->lease_version;
4465                 status = lease_match(conn,
4466                                 req,
4467                                 &lease->lease_key,
4468                                 conn->connectpath,
4469                                 smb_fname,
4470                                 &version,
4471                                 &epoch);
4472                 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4473                         /* Dynamic share file. No leases and update epoch... */
4474                         lease->lease_state = SMB2_LEASE_NONE;
4475                         lease->lease_epoch = epoch;
4476                         lease->lease_version = version;
4477                 } else if (!NT_STATUS_IS_OK(status)) {
4478                         goto fail;
4479                 }
4480         }
4481
4482         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
4483             && (access_mask & DELETE_ACCESS)
4484             && !is_ntfs_stream_smb_fname(smb_fname)) {
4485                 /*
4486                  * We can't open a file with DELETE access if any of the
4487                  * streams is open without FILE_SHARE_DELETE
4488                  */
4489                 status = open_streams_for_delete(conn, smb_fname->base_name);
4490
4491                 if (!NT_STATUS_IS_OK(status)) {
4492                         goto fail;
4493                 }
4494         }
4495
4496         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4497                         !security_token_has_privilege(get_current_nttok(conn),
4498                                         SEC_PRIV_SECURITY)) {
4499                 DEBUG(10, ("create_file_unixpath: open on %s "
4500                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4501                         smb_fname_str_dbg(smb_fname)));
4502                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
4503                 goto fail;
4504         }
4505
4506         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
4507             && is_ntfs_stream_smb_fname(smb_fname)
4508             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
4509                 uint32_t base_create_disposition;
4510                 struct smb_filename *smb_fname_base = NULL;
4511
4512                 if (create_options & FILE_DIRECTORY_FILE) {
4513                         status = NT_STATUS_NOT_A_DIRECTORY;
4514                         goto fail;
4515                 }
4516
4517                 switch (create_disposition) {
4518                 case FILE_OPEN:
4519                         base_create_disposition = FILE_OPEN;
4520                         break;
4521                 default:
4522                         base_create_disposition = FILE_OPEN_IF;
4523                         break;
4524                 }
4525
4526                 /* Create an smb_filename with stream_name == NULL. */
4527                 smb_fname_base = synthetic_smb_fname(talloc_tos(),
4528                                                      smb_fname->base_name,
4529                                                      NULL, NULL);
4530                 if (smb_fname_base == NULL) {
4531                         status = NT_STATUS_NO_MEMORY;
4532                         goto fail;
4533                 }
4534
4535                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
4536                         DEBUG(10, ("Unable to stat stream: %s\n",
4537                                    smb_fname_str_dbg(smb_fname_base)));
4538                 } else {
4539                         /*
4540                          * https://bugzilla.samba.org/show_bug.cgi?id=10229
4541                          * We need to check if the requested access mask
4542                          * could be used to open the underlying file (if
4543                          * it existed), as we're passing in zero for the
4544                          * access mask to the base filename.
4545                          */
4546                         status = check_base_file_access(conn,
4547                                                         smb_fname_base,
4548                                                         access_mask);
4549
4550                         if (!NT_STATUS_IS_OK(status)) {
4551                                 DEBUG(10, ("Permission check "
4552                                         "for base %s failed: "
4553                                         "%s\n", smb_fname->base_name,
4554                                         nt_errstr(status)));
4555                                 goto fail;
4556                         }
4557                 }
4558
4559                 /* Open the base file. */
4560                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
4561                                               FILE_SHARE_READ
4562                                               | FILE_SHARE_WRITE
4563                                               | FILE_SHARE_DELETE,
4564                                               base_create_disposition,
4565                                               0, 0, 0, NULL, 0, 0, NULL, NULL,
4566                                               &base_fsp, NULL);
4567                 TALLOC_FREE(smb_fname_base);
4568
4569                 if (!NT_STATUS_IS_OK(status)) {
4570                         DEBUG(10, ("create_file_unixpath for base %s failed: "
4571                                    "%s\n", smb_fname->base_name,
4572                                    nt_errstr(status)));
4573                         goto fail;
4574                 }
4575                 /* we don't need the low level fd */
4576                 fd_close(base_fsp);
4577         }
4578
4579         /*
4580          * If it's a request for a directory open, deal with it separately.
4581          */
4582
4583         if (create_options & FILE_DIRECTORY_FILE) {
4584
4585                 if (create_options & FILE_NON_DIRECTORY_FILE) {
4586                         status = NT_STATUS_INVALID_PARAMETER;
4587                         goto fail;
4588                 }
4589
4590                 /* Can't open a temp directory. IFS kit test. */
4591                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
4592                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
4593                         status = NT_STATUS_INVALID_PARAMETER;
4594                         goto fail;
4595                 }
4596
4597                 /*
4598                  * We will get a create directory here if the Win32
4599                  * app specified a security descriptor in the
4600                  * CreateDirectory() call.
4601                  */
4602
4603                 oplock_request = 0;
4604                 status = open_directory(
4605                         conn, req, smb_fname, access_mask, share_access,
4606                         create_disposition, create_options, file_attributes,
4607                         &info, &fsp);
4608         } else {
4609
4610                 /*
4611                  * Ordinary file case.
4612                  */
4613
4614                 status = file_new(req, conn, &fsp);
4615                 if(!NT_STATUS_IS_OK(status)) {
4616                         goto fail;
4617                 }
4618
4619                 status = fsp_set_smb_fname(fsp, smb_fname);
4620                 if (!NT_STATUS_IS_OK(status)) {
4621                         goto fail;
4622                 }
4623
4624                 if (base_fsp) {
4625                         /*
4626                          * We're opening the stream element of a
4627                          * base_fsp we already opened. Set up the
4628                          * base_fsp pointer.
4629                          */
4630                         fsp->base_fsp = base_fsp;
4631                 }
4632
4633                 if (allocation_size) {
4634                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
4635                                                         allocation_size);
4636                 }
4637
4638                 status = open_file_ntcreate(conn,
4639                                             req,
4640                                             access_mask,
4641                                             share_access,
4642                                             create_disposition,
4643                                             create_options,
4644                                             file_attributes,
4645                                             oplock_request,
4646                                             lease,
4647                                             private_flags,
4648                                             &info,
4649                                             fsp);
4650
4651                 if(!NT_STATUS_IS_OK(status)) {
4652                         file_free(req, fsp);
4653                         fsp = NULL;
4654                 }
4655
4656                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
4657
4658                         /* A stream open never opens a directory */
4659
4660                         if (base_fsp) {
4661                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4662                                 goto fail;
4663                         }
4664
4665                         /*
4666                          * Fail the open if it was explicitly a non-directory
4667                          * file.
4668                          */
4669
4670                         if (create_options & FILE_NON_DIRECTORY_FILE) {
4671                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4672                                 goto fail;
4673                         }
4674
4675                         oplock_request = 0;
4676                         status = open_directory(
4677                                 conn, req, smb_fname, access_mask,
4678                                 share_access, create_disposition,
4679                                 create_options, file_attributes,
4680                                 &info, &fsp);
4681                 }
4682         }
4683
4684         if (!NT_STATUS_IS_OK(status)) {
4685                 goto fail;
4686         }
4687
4688         fsp->base_fsp = base_fsp;
4689
4690         if ((ea_list != NULL) &&
4691             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
4692                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
4693                 if (!NT_STATUS_IS_OK(status)) {
4694                         goto fail;
4695                 }
4696         }
4697
4698         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4699                 status = NT_STATUS_ACCESS_DENIED;
4700                 goto fail;
4701         }
4702
4703         /* Save the requested allocation size. */
4704         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
4705                 if (allocation_size
4706                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
4707                         fsp->initial_allocation_size = smb_roundup(
4708                                 fsp->conn, allocation_size);
4709                         if (fsp->is_directory) {
4710                                 /* Can't set allocation size on a directory. */
4711                                 status = NT_STATUS_ACCESS_DENIED;
4712                                 goto fail;
4713                         }
4714                         if (vfs_allocate_file_space(
4715                                     fsp, fsp->initial_allocation_size) == -1) {
4716                                 status = NT_STATUS_DISK_FULL;
4717                                 goto fail;
4718                         }
4719                 } else {
4720                         fsp->initial_allocation_size = smb_roundup(
4721                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
4722                 }
4723         } else {
4724                 fsp->initial_allocation_size = 0;
4725         }
4726
4727         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
4728                                 fsp->base_fsp == NULL) {
4729                 if (sd != NULL) {
4730                         /*
4731                          * According to the MS documentation, the only time the security
4732                          * descriptor is applied to the opened file is iff we *created* the
4733                          * file; an existing file stays the same.
4734                          *
4735                          * Also, it seems (from observation) that you can open the file with
4736                          * any access mask but you can still write the sd. We need to override
4737                          * the granted access before we call set_sd
4738                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
4739                          */
4740
4741                         uint32_t sec_info_sent;
4742                         uint32_t saved_access_mask = fsp->access_mask;
4743
4744                         sec_info_sent = get_sec_info(sd);
4745
4746                         fsp->access_mask = FILE_GENERIC_ALL;
4747
4748                         if (sec_info_sent & (SECINFO_OWNER|
4749                                                 SECINFO_GROUP|
4750                                                 SECINFO_DACL|
4751                                                 SECINFO_SACL)) {
4752                                 status = set_sd(fsp, sd, sec_info_sent);
4753                         }
4754
4755                         fsp->access_mask = saved_access_mask;
4756
4757                         if (!NT_STATUS_IS_OK(status)) {
4758                                 goto fail;
4759                         }
4760                 } else if (lp_inherit_acls(SNUM(conn))) {
4761                         /* Inherit from parent. Errors here are not fatal. */
4762                         status = inherit_new_acl(fsp);
4763                         if (!NT_STATUS_IS_OK(status)) {
4764                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
4765                                         fsp_str_dbg(fsp),
4766                                         nt_errstr(status) ));
4767                         }
4768                 }
4769         }
4770
4771         if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
4772          && (create_options & FILE_NO_COMPRESSION)
4773          && (info == FILE_WAS_CREATED)) {
4774                 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
4775                                                  COMPRESSION_FORMAT_NONE);
4776                 if (!NT_STATUS_IS_OK(status)) {
4777                         DEBUG(1, ("failed to disable compression: %s\n",
4778                                   nt_errstr(status)));
4779                 }
4780         }
4781
4782         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
4783
4784         *result = fsp;
4785         if (pinfo != NULL) {
4786                 *pinfo = info;
4787         }
4788
4789         smb_fname->st = fsp->fsp_name->st;
4790
4791         return NT_STATUS_OK;
4792
4793  fail:
4794         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
4795
4796         if (fsp != NULL) {
4797                 if (base_fsp && fsp->base_fsp == base_fsp) {
4798                         /*
4799                          * The close_file below will close
4800                          * fsp->base_fsp.
4801                          */
4802                         base_fsp = NULL;
4803                 }
4804                 close_file(req, fsp, ERROR_CLOSE);
4805                 fsp = NULL;
4806         }
4807         if (base_fsp != NULL) {
4808                 close_file(req, base_fsp, ERROR_CLOSE);
4809                 base_fsp = NULL;
4810         }
4811         return status;
4812 }
4813
4814 /*
4815  * Calculate the full path name given a relative fid.
4816  */
4817 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4818                                    struct smb_request *req,
4819                                    uint16_t root_dir_fid,
4820                                    const struct smb_filename *smb_fname,
4821                                    struct smb_filename **smb_fname_out)
4822 {
4823         files_struct *dir_fsp;
4824         char *parent_fname = NULL;
4825         char *new_base_name = NULL;
4826         NTSTATUS status;
4827
4828         if (root_dir_fid == 0 || !smb_fname) {
4829                 status = NT_STATUS_INTERNAL_ERROR;
4830                 goto out;
4831         }
4832
4833         dir_fsp = file_fsp(req, root_dir_fid);
4834
4835         if (dir_fsp == NULL) {
4836                 status = NT_STATUS_INVALID_HANDLE;
4837                 goto out;
4838         }
4839
4840         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4841                 status = NT_STATUS_INVALID_HANDLE;
4842                 goto out;
4843         }
4844
4845         if (!dir_fsp->is_directory) {
4846
4847                 /*
4848                  * Check to see if this is a mac fork of some kind.
4849                  */
4850
4851                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4852                     is_ntfs_stream_smb_fname(smb_fname)) {
4853                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4854                         goto out;
4855                 }
4856
4857                 /*
4858                   we need to handle the case when we get a
4859                   relative open relative to a file and the
4860                   pathname is blank - this is a reopen!
4861                   (hint from demyn plantenberg)
4862                 */
4863
4864                 status = NT_STATUS_INVALID_HANDLE;
4865                 goto out;
4866         }
4867
4868         if (ISDOT(dir_fsp->fsp_name->base_name)) {
4869                 /*
4870                  * We're at the toplevel dir, the final file name
4871                  * must not contain ./, as this is filtered out
4872                  * normally by srvstr_get_path and unix_convert
4873                  * explicitly rejects paths containing ./.
4874                  */
4875                 parent_fname = talloc_strdup(talloc_tos(), "");
4876                 if (parent_fname == NULL) {
4877                         status = NT_STATUS_NO_MEMORY;
4878                         goto out;
4879                 }
4880         } else {
4881                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4882
4883                 /*
4884                  * Copy in the base directory name.
4885                  */
4886
4887                 parent_fname = talloc_array(talloc_tos(), char,
4888                     dir_name_len+2);
4889                 if (parent_fname == NULL) {
4890                         status = NT_STATUS_NO_MEMORY;
4891                         goto out;
4892                 }
4893                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4894                     dir_name_len+1);
4895
4896                 /*
4897                  * Ensure it ends in a '/'.
4898                  * We used TALLOC_SIZE +2 to add space for the '/'.
4899                  */
4900
4901                 if(dir_name_len
4902                     && (parent_fname[dir_name_len-1] != '\\')
4903                     && (parent_fname[dir_name_len-1] != '/')) {
4904                         parent_fname[dir_name_len] = '/';
4905                         parent_fname[dir_name_len+1] = '\0';
4906                 }
4907         }
4908
4909         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4910                                         smb_fname->base_name);
4911         if (new_base_name == NULL) {
4912                 status = NT_STATUS_NO_MEMORY;
4913                 goto out;
4914         }
4915
4916         status = filename_convert(req,
4917                                 conn,
4918                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
4919                                 new_base_name,
4920                                 0,
4921                                 NULL,
4922                                 smb_fname_out);
4923         if (!NT_STATUS_IS_OK(status)) {
4924                 goto out;
4925         }
4926
4927  out:
4928         TALLOC_FREE(parent_fname);
4929         TALLOC_FREE(new_base_name);
4930         return status;
4931 }
4932
4933 NTSTATUS create_file_default(connection_struct *conn,
4934                              struct smb_request *req,
4935                              uint16_t root_dir_fid,
4936                              struct smb_filename *smb_fname,
4937                              uint32_t access_mask,
4938                              uint32_t share_access,
4939                              uint32_t create_disposition,
4940                              uint32_t create_options,
4941                              uint32_t file_attributes,
4942                              uint32_t oplock_request,
4943                              struct smb2_lease *lease,
4944                              uint64_t allocation_size,
4945                              uint32_t private_flags,
4946                              struct security_descriptor *sd,
4947                              struct ea_list *ea_list,
4948                              files_struct **result,
4949                              int *pinfo,
4950                              const struct smb2_create_blobs *in_context_blobs,
4951                              struct smb2_create_blobs *out_context_blobs)
4952 {
4953         int info = FILE_WAS_OPENED;
4954         files_struct *fsp = NULL;
4955         NTSTATUS status;
4956         bool stream_name = false;
4957
4958         DEBUG(10,("create_file: access_mask = 0x%x "
4959                   "file_attributes = 0x%x, share_access = 0x%x, "
4960                   "create_disposition = 0x%x create_options = 0x%x "
4961                   "oplock_request = 0x%x "
4962                   "private_flags = 0x%x "
4963                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4964                   "fname = %s\n",
4965                   (unsigned int)access_mask,
4966                   (unsigned int)file_attributes,
4967                   (unsigned int)share_access,
4968                   (unsigned int)create_disposition,
4969                   (unsigned int)create_options,
4970                   (unsigned int)oplock_request,
4971                   (unsigned int)private_flags,
4972                   (unsigned int)root_dir_fid,
4973                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4974
4975         /*
4976          * Calculate the filename from the root_dir_if if necessary.
4977          */
4978
4979         if (root_dir_fid != 0) {
4980                 struct smb_filename *smb_fname_out = NULL;
4981                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4982                                                    smb_fname, &smb_fname_out);
4983                 if (!NT_STATUS_IS_OK(status)) {
4984                         goto fail;
4985                 }
4986                 smb_fname = smb_fname_out;
4987         }
4988
4989         /*
4990          * Check to see if this is a mac fork of some kind.
4991          */
4992
4993         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4994         if (stream_name) {
4995                 enum FAKE_FILE_TYPE fake_file_type;
4996
4997                 fake_file_type = is_fake_file(smb_fname);
4998
4999                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5000
5001                         /*
5002                          * Here we go! support for changing the disk quotas
5003                          * --metze
5004                          *
5005                          * We need to fake up to open this MAGIC QUOTA file
5006                          * and return a valid FID.
5007                          *
5008                          * w2k close this file directly after openening xp
5009                          * also tries a QUERY_FILE_INFO on the file and then
5010                          * close it
5011                          */
5012                         status = open_fake_file(req, conn, req->vuid,
5013                                                 fake_file_type, smb_fname,
5014                                                 access_mask, &fsp);
5015                         if (!NT_STATUS_IS_OK(status)) {
5016                                 goto fail;
5017                         }
5018
5019                         ZERO_STRUCT(smb_fname->st);
5020                         goto done;
5021                 }
5022
5023                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5024                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5025                         goto fail;
5026                 }
5027         }
5028
5029         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5030                 int ret;
5031                 smb_fname->stream_name = NULL;
5032                 /* We have to handle this error here. */
5033                 if (create_options & FILE_DIRECTORY_FILE) {
5034                         status = NT_STATUS_NOT_A_DIRECTORY;
5035                         goto fail;
5036                 }
5037                 if (lp_posix_pathnames()) {
5038                         ret = SMB_VFS_LSTAT(conn, smb_fname);
5039                 } else {
5040                         ret = SMB_VFS_STAT(conn, smb_fname);
5041                 }
5042
5043                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5044                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
5045                         goto fail;
5046                 }
5047         }
5048
5049         status = create_file_unixpath(
5050                 conn, req, smb_fname, access_mask, share_access,
5051                 create_disposition, create_options, file_attributes,
5052                 oplock_request, lease, allocation_size, private_flags,
5053                 sd, ea_list,
5054                 &fsp, &info);
5055
5056         if (!NT_STATUS_IS_OK(status)) {
5057                 goto fail;
5058         }
5059
5060  done:
5061         DEBUG(10, ("create_file: info=%d\n", info));
5062
5063         *result = fsp;
5064         if (pinfo != NULL) {
5065                 *pinfo = info;
5066         }
5067         return NT_STATUS_OK;
5068
5069  fail:
5070         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5071
5072         if (fsp != NULL) {
5073                 close_file(req, fsp, ERROR_CLOSE);
5074                 fsp = NULL;
5075         }
5076         return status;
5077 }