source3/smbd/open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    file opening and share modes
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2004
   6    Copyright (C) Volker Lendecke 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "printing.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "fake_file.h"
  28 #include "../libcli/security/security.h"
  29 #include "../librpc/gen_ndr/ndr_security.h"
  30 #include "../librpc/gen_ndr/open_files.h"
  31 #include "auth.h"
  32 #include "messages.h"
  33
  34 extern const struct generic_mapping file_generic_mapping;
  35
  36 struct deferred_open_record {
  37         bool delayed_for_oplocks;
  38         bool async_open;
  39         struct file_id id;
  40 };
  41
  42 /****************************************************************************
  43  If the requester wanted DELETE_ACCESS and was rejected because
  44  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
  45  overrides this.
  46 ****************************************************************************/
  47
  48 static bool parent_override_delete(connection_struct *conn,
  49                                         const struct smb_filename *smb_fname,
  50                                         uint32_t access_mask,
  51                                         uint32_t rejected_mask)
  52 {
  53         if ((access_mask & DELETE_ACCESS) &&
  54                     (rejected_mask & DELETE_ACCESS) &&
  55                     can_delete_file_in_directory(conn, smb_fname)) {
  56                 return true;
  57         }
  58         return false;
  59 }
  60
  61 /****************************************************************************
  62  Check if we have open rights.
  63 ****************************************************************************/
  64
  65 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
  66                                 const struct smb_filename *smb_fname,
  67                                 uint32_t access_mask)
  68 {
  69         /* Check if we have rights to open. */
  70         NTSTATUS status;
  71         struct security_descriptor *sd = NULL;
  72         uint32_t rejected_share_access;
  73         uint32_t rejected_mask = access_mask;
  74
  75         rejected_share_access = access_mask & ~(conn->share_access);
  76
  77         if (rejected_share_access) {
  78                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
  79                         "on %s (0x%x)\n",
  80                         (unsigned int)access_mask,
  81                         smb_fname_str_dbg(smb_fname),
  82                         (unsigned int)rejected_share_access ));
  83                 return NT_STATUS_ACCESS_DENIED;
  84         }
  85
  86         if (get_current_uid(conn) == (uid_t)0) {
  87                 /* I'm sorry sir, I didn't know you were root... */
  88                 DEBUG(10,("smbd_check_access_rights: root override "
  89                         "on %s. Granting 0x%x\n",
  90                         smb_fname_str_dbg(smb_fname),
  91                         (unsigned int)access_mask ));
  92                 return NT_STATUS_OK;
  93         }
  94
  95         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
  96                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
  97                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
  98                         smb_fname_str_dbg(smb_fname),
  99                         (unsigned int)access_mask ));
 100                 return NT_STATUS_OK;
 101         }
 102
 103         if (access_mask == DELETE_ACCESS &&
 104                         VALID_STAT(smb_fname->st) &&
 105                         S_ISLNK(smb_fname->st.st_ex_mode)) {
 106                 /* We can always delete a symlink. */
 107                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
 108                         "on DELETE_ACCESS on symlink %s.\n",
 109                         smb_fname_str_dbg(smb_fname) ));
 110                 return NT_STATUS_OK;
 111         }
 112
 113         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
 114                         (SECINFO_OWNER |
 115                         SECINFO_GROUP |
 116                         SECINFO_DACL),&sd);
 117
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
 120                         "on %s: %s\n",
 121                         smb_fname_str_dbg(smb_fname),
 122                         nt_errstr(status)));
 123
 124                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 125                         goto access_denied;
 126                 }
 127
 128                 return status;
 129         }
 130
 131         /*
 132          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
 133          * owner WRITE_DAC and READ_CONTROL.
 134          */
 135         status = se_file_access_check(sd,
 136                                 get_current_nttok(conn),
 137                                 false,
 138                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 139                                 &rejected_mask);
 140
 141         DEBUG(10,("smbd_check_access_rights: file %s requesting "
 142                 "0x%x returning 0x%x (%s)\n",
 143                 smb_fname_str_dbg(smb_fname),
 144                 (unsigned int)access_mask,
 145                 (unsigned int)rejected_mask,
 146                 nt_errstr(status) ));
 147
 148         if (!NT_STATUS_IS_OK(status)) {
 149                 if (DEBUGLEVEL >= 10) {
 150                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
 151                                 smb_fname_str_dbg(smb_fname) ));
 152                         NDR_PRINT_DEBUG(security_descriptor, sd);
 153                 }
 154         }
 155
 156         TALLOC_FREE(sd);
 157
 158         if (NT_STATUS_IS_OK(status) ||
 159                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
 160                 return status;
 161         }
 162
 163         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
 164
 165   access_denied:
 166
 167         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
 168                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
 169                         !lp_store_dos_attributes(SNUM(conn)) &&
 170                         (lp_map_readonly(SNUM(conn)) ||
 171                         lp_map_archive(SNUM(conn)) ||
 172                         lp_map_hidden(SNUM(conn)) ||
 173                         lp_map_system(SNUM(conn)))) {
 174                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
 175
 176                 DEBUG(10,("smbd_check_access_rights: "
 177                         "overrode "
 178                         "FILE_WRITE_ATTRIBUTES "
 179                         "on file %s\n",
 180                         smb_fname_str_dbg(smb_fname)));
 181         }
 182
 183         if (parent_override_delete(conn,
 184                                 smb_fname,
 185                                 access_mask,
 186                                 rejected_mask)) {
 187                 /* Were we trying to do an open
 188                  * for delete and didn't get DELETE
 189                  * access (only) ? Check if the
 190                  * directory allows DELETE_CHILD.
 191                  * See here:
 192                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
 193                  * for details. */
 194
 195                 rejected_mask &= ~DELETE_ACCESS;
 196
 197                 DEBUG(10,("smbd_check_access_rights: "
 198                         "overrode "
 199                         "DELETE_ACCESS on "
 200                         "file %s\n",
 201                         smb_fname_str_dbg(smb_fname)));
 202         }
 203
 204         if (rejected_mask != 0) {
 205                 return NT_STATUS_ACCESS_DENIED;
 206         }
 207         return NT_STATUS_OK;
 208 }
 209
 210 static NTSTATUS check_parent_access(struct connection_struct *conn,
 211                                 struct smb_filename *smb_fname,
 212                                 uint32_t access_mask)
 213 {
 214         NTSTATUS status;
 215         char *parent_dir = NULL;
 216         struct security_descriptor *parent_sd = NULL;
 217         uint32_t access_granted = 0;
 218
 219         if (!parent_dirname(talloc_tos(),
 220                                 smb_fname->base_name,
 221                                 &parent_dir,
 222                                 NULL)) {
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225
 226         if (get_current_uid(conn) == (uid_t)0) {
 227                 /* I'm sorry sir, I didn't know you were root... */
 228                 DEBUG(10,("check_parent_access: root override "
 229                         "on %s. Granting 0x%x\n",
 230                         smb_fname_str_dbg(smb_fname),
 231                         (unsigned int)access_mask ));
 232                 return NT_STATUS_OK;
 233         }
 234
 235         status = SMB_VFS_GET_NT_ACL(conn,
 236                                 parent_dir,
 237                                 SECINFO_DACL,
 238                                 &parent_sd);
 239
 240         if (!NT_STATUS_IS_OK(status)) {
 241                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
 242                         "%s with error %s\n",
 243                         parent_dir,
 244                         nt_errstr(status)));
 245                 return status;
 246         }
 247
 248         /*
 249          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
 250          * owner WRITE_DAC and READ_CONTROL.
 251          */
 252         status = se_file_access_check(parent_sd,
 253                                 get_current_nttok(conn),
 254                                 false,
 255                                 (access_mask & ~FILE_READ_ATTRIBUTES),
 256                                 &access_granted);
 257         if(!NT_STATUS_IS_OK(status)) {
 258                 DEBUG(5,("check_parent_access: access check "
 259                         "on directory %s for "
 260                         "path %s for mask 0x%x returned (0x%x) %s\n",
 261                         parent_dir,
 262                         smb_fname->base_name,
 263                         access_mask,
 264                         access_granted,
 265                         nt_errstr(status) ));
 266                 return status;
 267         }
 268
 269         return NT_STATUS_OK;
 270 }
 271
 272 /****************************************************************************
 273  fd support routines - attempt to do a dos_open.
 274 ****************************************************************************/
 275
 276 static NTSTATUS fd_open(struct connection_struct *conn,
 277                     files_struct *fsp,
 278                     int flags,
 279                     mode_t mode)
 280 {
 281         struct smb_filename *smb_fname = fsp->fsp_name;
 282         NTSTATUS status = NT_STATUS_OK;
 283
 284 #ifdef O_NOFOLLOW
 285         /*
 286          * Never follow symlinks on a POSIX client. The
 287          * client should be doing this.
 288          */
 289
 290         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
 291                 flags |= O_NOFOLLOW;
 292         }
 293 #endif
 294
 295         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
 296         if (fsp->fh->fd == -1) {
 297                 int posix_errno = errno;
 298 #ifdef O_NOFOLLOW
 299 #if defined(ENOTSUP) && defined(OSF1)
 300                 /* handle special Tru64 errno */
 301                 if (errno == ENOTSUP) {
 302                         posix_errno = ELOOP;
 303                 }
 304 #endif /* ENOTSUP */
 305 #ifdef EFTYPE
 306                 /* fix broken NetBSD errno */
 307                 if (errno == EFTYPE) {
 308                         posix_errno = ELOOP;
 309                 }
 310 #endif /* EFTYPE */
 311                 /* fix broken FreeBSD errno */
 312                 if (errno == EMLINK) {
 313                         posix_errno = ELOOP;
 314                 }
 315 #endif /* O_NOFOLLOW */
 316                 status = map_nt_error_from_unix(posix_errno);
 317                 if (errno == EMFILE) {
 318                         static time_t last_warned = 0L;
 319
 320                         if (time((time_t *) NULL) > last_warned) {
 321                                 DEBUG(0,("Too many open files, unable "
 322                                         "to open more!  smbd's max "
 323                                         "open files = %d\n",
 324                                         lp_max_open_files()));
 325                                 last_warned = time((time_t *) NULL);
 326                         }
 327                 }
 328
 329         }
 330
 331         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
 332                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
 333                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
 334
 335         return status;
 336 }
 337
 338 /****************************************************************************
 339  Close the file associated with a fsp.
 340 ****************************************************************************/
 341
 342 NTSTATUS fd_close(files_struct *fsp)
 343 {
 344         int ret;
 345
 346         if (fsp->dptr) {
 347                 dptr_CloseDir(fsp);
 348         }
 349         if (fsp->fh->fd == -1) {
 350                 return NT_STATUS_OK; /* What we used to call a stat open. */
 351         }
 352         if (fsp->fh->ref_count > 1) {
 353                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
 354         }
 355
 356         ret = SMB_VFS_CLOSE(fsp);
 357         fsp->fh->fd = -1;
 358         if (ret == -1) {
 359                 return map_nt_error_from_unix(errno);
 360         }
 361         return NT_STATUS_OK;
 362 }
 363
 364 /****************************************************************************
 365  Change the ownership of a file to that of the parent directory.
 366  Do this by fd if possible.
 367 ****************************************************************************/
 368
 369 void change_file_owner_to_parent(connection_struct *conn,
 370                                         const char *inherit_from_dir,
 371                                         files_struct *fsp)
 372 {
 373         struct smb_filename *smb_fname_parent = NULL;
 374         NTSTATUS status;
 375         int ret;
 376
 377         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
 378                                             NULL, NULL, &smb_fname_parent);
 379         if (!NT_STATUS_IS_OK(status)) {
 380                 return;
 381         }
 382
 383         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 384         if (ret == -1) {
 385                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
 386                          "directory %s. Error was %s\n",
 387                          smb_fname_str_dbg(smb_fname_parent),
 388                          strerror(errno)));
 389                 TALLOC_FREE(smb_fname_parent);
 390                 return;
 391         }
 392
 393         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
 394                 /* Already this uid - no need to change. */
 395                 DEBUG(10,("change_file_owner_to_parent: file %s "
 396                         "is already owned by uid %d\n",
 397                         fsp_str_dbg(fsp),
 398                         (int)fsp->fsp_name->st.st_ex_uid ));
 399                 TALLOC_FREE(smb_fname_parent);
 400                 return;
 401         }
 402
 403         become_root();
 404         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
 405         unbecome_root();
 406         if (ret == -1) {
 407                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
 408                          "file %s to parent directory uid %u. Error "
 409                          "was %s\n", fsp_str_dbg(fsp),
 410                          (unsigned int)smb_fname_parent->st.st_ex_uid,
 411                          strerror(errno) ));
 412         } else {
 413                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
 414                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
 415                         (unsigned int)smb_fname_parent->st.st_ex_uid));
 416                 /* Ensure the uid entry is updated. */
 417                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
 418         }
 419
 420         TALLOC_FREE(smb_fname_parent);
 421 }
 422
 423 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
 424                                        const char *inherit_from_dir,
 425                                        const char *fname,
 426                                        SMB_STRUCT_STAT *psbuf)
 427 {
 428         struct smb_filename *smb_fname_parent = NULL;
 429         struct smb_filename *smb_fname_cwd = NULL;
 430         char *saved_dir = NULL;
 431         TALLOC_CTX *ctx = talloc_tos();
 432         NTSTATUS status = NT_STATUS_OK;
 433         int ret;
 434
 435         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
 436                                             &smb_fname_parent);
 437         if (!NT_STATUS_IS_OK(status)) {
 438                 return status;
 439         }
 440
 441         ret = SMB_VFS_STAT(conn, smb_fname_parent);
 442         if (ret == -1) {
 443                 status = map_nt_error_from_unix(errno);
 444                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
 445                          "directory %s. Error was %s\n",
 446                          smb_fname_str_dbg(smb_fname_parent),
 447                          strerror(errno)));
 448                 goto out;
 449         }
 450
 451         /* We've already done an lstat into psbuf, and we know it's a
 452            directory. If we can cd into the directory and the dev/ino
 453            are the same then we can safely chown without races as
 454            we're locking the directory in place by being in it.  This
 455            should work on any UNIX (thanks tridge :-). JRA.
 456         */
 457
 458         saved_dir = vfs_GetWd(ctx,conn);
 459         if (!saved_dir) {
 460                 status = map_nt_error_from_unix(errno);
 461                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
 462                          "current working directory. Error was %s\n",
 463                          strerror(errno)));
 464                 goto out;
 465         }
 466
 467         /* Chdir into the new path. */
 468         if (vfs_ChDir(conn, fname) == -1) {
 469                 status = map_nt_error_from_unix(errno);
 470                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
 471                          "current working directory to %s. Error "
 472                          "was %s\n", fname, strerror(errno) ));
 473                 goto chdir;
 474         }
 475
 476         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
 477                                             &smb_fname_cwd);
 478         if (!NT_STATUS_IS_OK(status)) {
 479                 return status;
 480         }
 481
 482         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
 483         if (ret == -1) {
 484                 status = map_nt_error_from_unix(errno);
 485                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
 486                          "directory '.' (%s) Error was %s\n",
 487                          fname, strerror(errno)));
 488                 goto chdir;
 489         }
 490
 491         /* Ensure we're pointing at the same place. */
 492         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
 493             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
 494                 DEBUG(0,("change_dir_owner_to_parent: "
 495                          "device/inode on directory %s changed. "
 496                          "Refusing to chown !\n", fname ));
 497                 status = NT_STATUS_ACCESS_DENIED;
 498                 goto chdir;
 499         }
 500
 501         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
 502                 /* Already this uid - no need to change. */
 503                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
 504                         "is already owned by uid %d\n",
 505                         fname,
 506                         (int)smb_fname_cwd->st.st_ex_uid ));
 507                 status = NT_STATUS_OK;
 508                 goto chdir;
 509         }
 510
 511         become_root();
 512         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
 513                             (gid_t)-1);
 514         unbecome_root();
 515         if (ret == -1) {
 516                 status = map_nt_error_from_unix(errno);
 517                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
 518                           "directory %s to parent directory uid %u. "
 519                           "Error was %s\n", fname,
 520                           (unsigned int)smb_fname_parent->st.st_ex_uid,
 521                           strerror(errno) ));
 522         } else {
 523                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
 524                         "directory %s to parent directory uid %u.\n",
 525                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
 526                 /* Ensure the uid entry is updated. */
 527                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
 528         }
 529
 530  chdir:
 531         vfs_ChDir(conn,saved_dir);
 532  out:
 533         TALLOC_FREE(smb_fname_parent);
 534         TALLOC_FREE(smb_fname_cwd);
 535         return status;
 536 }
 537
 538 /****************************************************************************
 539  Open a file - returning a guaranteed ATOMIC indication of if the
 540  file was created or not.
 541 ****************************************************************************/
 542
 543 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
 544                         files_struct *fsp,
 545                         int flags,
 546                         mode_t mode,
 547                         bool *file_created)
 548 {
 549         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 550         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 551
 552         *file_created = false;
 553
 554         if (!(flags & O_CREAT)) {
 555                 /*
 556                  * We're not creating the file, just pass through.
 557                  */
 558                 return fd_open(conn, fsp, flags, mode);
 559         }
 560
 561         if (flags & O_EXCL) {
 562                 /*
 563                  * Fail if already exists, just pass through.
 564                  */
 565                 status = fd_open(conn, fsp, flags, mode);
 566                 if (NT_STATUS_IS_OK(status)) {
 567                         /*
 568                          * Here we've opened with O_CREAT|O_EXCL
 569                          * and got success. We *know* we created
 570                          * this file.
 571                          */
 572                         *file_created = true;
 573                 }
 574                 return status;
 575         }
 576
 577         /*
 578          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
 579          * To know absolutely if we created the file or not,
 580          * we can never call O_CREAT without O_EXCL. So if
 581          * we think the file existed, try without O_CREAT|O_EXCL.
 582          * If we think the file didn't exist, try with
 583          * O_CREAT|O_EXCL. Keep bouncing between these two
 584          * requests until either the file is created, or
 585          * opened. Either way, we keep going until we get
 586          * a returnable result (error, or open/create).
 587          */
 588
 589         while(1) {
 590                 int curr_flags = flags;
 591
 592                 if (file_existed) {
 593                         /* Just try open, do not create. */
 594                         curr_flags &= ~(O_CREAT);
 595                         status = fd_open(conn, fsp, curr_flags, mode);
 596                         if (NT_STATUS_EQUAL(status,
 597                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 598                                 /*
 599                                  * Someone deleted it in the meantime.
 600                                  * Retry with O_EXCL.
 601                                  */
 602                                 file_existed = false;
 603                                 DEBUG(10,("fd_open_atomic: file %s existed. "
 604                                         "Retry.\n",
 605                                         smb_fname_str_dbg(fsp->fsp_name)));
 606                                         continue;
 607                         }
 608                 } else {
 609                         /* Try create exclusively, fail if it exists. */
 610                         curr_flags |= O_EXCL;
 611                         status = fd_open(conn, fsp, curr_flags, mode);
 612                         if (NT_STATUS_EQUAL(status,
 613                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
 614                                 /*
 615                                  * Someone created it in the meantime.
 616                                  * Retry without O_CREAT.
 617                                  */
 618                                 file_existed = true;
 619                                 DEBUG(10,("fd_open_atomic: file %s "
 620                                         "did not exist. Retry.\n",
 621                                         smb_fname_str_dbg(fsp->fsp_name)));
 622                                 continue;
 623                         }
 624                         if (NT_STATUS_IS_OK(status)) {
 625                                 /*
 626                                  * Here we've opened with O_CREAT|O_EXCL
 627                                  * and got success. We *know* we created
 628                                  * this file.
 629                                  */
 630                                 *file_created = true;
 631                         }
 632                 }
 633                 /* Create is done, or failed. */
 634                 break;
 635         }
 636         return status;
 637 }
 638
 639 /****************************************************************************
 640  Open a file.
 641 ****************************************************************************/
 642
 643 static NTSTATUS open_file(files_struct *fsp,
 644                           connection_struct *conn,
 645                           struct smb_request *req,
 646                           const char *parent_dir,
 647                           int flags,
 648                           mode_t unx_mode,
 649                           uint32 access_mask, /* client requested access mask. */
 650                           uint32 open_access_mask, /* what we're actually using in the open. */
 651                           bool *p_file_created)
 652 {
 653         struct smb_filename *smb_fname = fsp->fsp_name;
 654         NTSTATUS status = NT_STATUS_OK;
 655         int accmode = (flags & O_ACCMODE);
 656         int local_flags = flags;
 657         bool file_existed = VALID_STAT(fsp->fsp_name->st);
 658
 659         fsp->fh->fd = -1;
 660         errno = EPERM;
 661
 662         /* Check permissions */
 663
 664         /*
 665          * This code was changed after seeing a client open request
 666          * containing the open mode of (DENY_WRITE/read-only) with
 667          * the 'create if not exist' bit set. The previous code
 668          * would fail to open the file read only on a read-only share
 669          * as it was checking the flags parameter  directly against O_RDONLY,
 670          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
 671          * JRA.
 672          */
 673
 674         if (!CAN_WRITE(conn)) {
 675                 /* It's a read-only share - fail if we wanted to write. */
 676                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
 677                         DEBUG(3,("Permission denied opening %s\n",
 678                                  smb_fname_str_dbg(smb_fname)));
 679                         return NT_STATUS_ACCESS_DENIED;
 680                 } else if(flags & O_CREAT) {
 681                         /* We don't want to write - but we must make sure that
 682                            O_CREAT doesn't create the file if we have write
 683                            access into the directory.
 684                         */
 685                         flags &= ~(O_CREAT|O_EXCL);
 686                         local_flags &= ~(O_CREAT|O_EXCL);
 687                 }
 688         }
 689
 690         /*
 691          * This little piece of insanity is inspired by the
 692          * fact that an NT client can open a file for O_RDONLY,
 693          * but set the create disposition to FILE_EXISTS_TRUNCATE.
 694          * If the client *can* write to the file, then it expects to
 695          * truncate the file, even though it is opening for readonly.
 696          * Quicken uses this stupid trick in backup file creation...
 697          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
 698          * for helping track this one down. It didn't bite us in 2.0.x
 699          * as we always opened files read-write in that release. JRA.
 700          */
 701
 702         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
 703                 DEBUG(10,("open_file: truncate requested on read-only open "
 704                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
 705                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
 706         }
 707
 708         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
 709             (!file_existed && (local_flags & O_CREAT)) ||
 710             ((local_flags & O_TRUNC) == O_TRUNC) ) {
 711                 const char *wild;
 712                 int ret;
 713
 714                 /*
 715                  * We can't actually truncate here as the file may be locked.
 716                  * open_file_ntcreate will take care of the truncate later. JRA.
 717                  */
 718
 719                 local_flags &= ~O_TRUNC;
 720
 721 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
 722                 /*
 723                  * We would block on opening a FIFO with no one else on the
 724                  * other end. Do what we used to do and add O_NONBLOCK to the
 725                  * open flags. JRA.
 726                  */
 727
 728                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
 729                         local_flags |= O_NONBLOCK;
 730                 }
 731 #endif
 732
 733                 /* Don't create files with Microsoft wildcard characters. */
 734                 if (fsp->base_fsp) {
 735                         /*
 736                          * wildcard characters are allowed in stream names
 737                          * only test the basefilename
 738                          */
 739                         wild = fsp->base_fsp->fsp_name->base_name;
 740                 } else {
 741                         wild = smb_fname->base_name;
 742                 }
 743                 if ((local_flags & O_CREAT) && !file_existed &&
 744                     ms_has_wild(wild))  {
 745                         return NT_STATUS_OBJECT_NAME_INVALID;
 746                 }
 747
 748                 /* Can we access this file ? */
 749                 if (!fsp->base_fsp) {
 750                         /* Only do this check on non-stream open. */
 751                         if (file_existed) {
 752                                 status = smbd_check_access_rights(conn,
 753                                                 smb_fname,
 754                                                 access_mask);
 755                         } else if (local_flags & O_CREAT){
 756                                 status = check_parent_access(conn,
 757                                                 smb_fname,
 758                                                 SEC_DIR_ADD_FILE);
 759                         } else {
 760                                 /* File didn't exist and no O_CREAT. */
 761                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 762                         }
 763                         if (!NT_STATUS_IS_OK(status)) {
 764                                 DEBUG(10,("open_file: "
 765                                         "%s on file "
 766                                         "%s returned %s\n",
 767                                         file_existed ?
 768                                                 "smbd_check_access_rights" :
 769                                                 "check_parent_access",
 770                                         smb_fname_str_dbg(smb_fname),
 771                                         nt_errstr(status) ));
 772                                 return status;
 773                         }
 774                 }
 775
 776                 /* Actually do the open */
 777                 status = fd_open_atomic(conn, fsp, local_flags,
 778                                 unx_mode, p_file_created);
 779                 if (!NT_STATUS_IS_OK(status)) {
 780                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
 781                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
 782                                  nt_errstr(status),local_flags,flags));
 783                         return status;
 784                 }
 785
 786                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 787                 if (ret == -1) {
 788                         /* If we have an fd, this stat should succeed. */
 789                         DEBUG(0,("Error doing fstat on open file %s "
 790                                 "(%s)\n",
 791                                 smb_fname_str_dbg(smb_fname),
 792                                 strerror(errno) ));
 793                         status = map_nt_error_from_unix(errno);
 794                         fd_close(fsp);
 795                         return status;
 796                 }
 797
 798                 if (*p_file_created) {
 799                         /* We created this file. */
 800
 801                         bool need_re_stat = false;
 802                         /* Do all inheritance work after we've
 803                            done a successful fstat call and filled
 804                            in the stat struct in fsp->fsp_name. */
 805
 806                         /* Inherit the ACL if required */
 807                         if (lp_inherit_perms(SNUM(conn))) {
 808                                 inherit_access_posix_acl(conn, parent_dir,
 809                                                          smb_fname->base_name,
 810                                                          unx_mode);
 811                                 need_re_stat = true;
 812                         }
 813
 814                         /* Change the owner if required. */
 815                         if (lp_inherit_owner(SNUM(conn))) {
 816                                 change_file_owner_to_parent(conn, parent_dir,
 817                                                             fsp);
 818                                 need_re_stat = true;
 819                         }
 820
 821                         if (need_re_stat) {
 822                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 823                                 /* If we have an fd, this stat should succeed. */
 824                                 if (ret == -1) {
 825                                         DEBUG(0,("Error doing fstat on open file %s "
 826                                                  "(%s)\n",
 827                                                  smb_fname_str_dbg(smb_fname),
 828                                                  strerror(errno) ));
 829                                 }
 830                         }
 831
 832                         notify_fname(conn, NOTIFY_ACTION_ADDED,
 833                                      FILE_NOTIFY_CHANGE_FILE_NAME,
 834                                      smb_fname->base_name);
 835                 }
 836         } else {
 837                 fsp->fh->fd = -1; /* What we used to call a stat open. */
 838                 if (!file_existed) {
 839                         /* File must exist for a stat open. */
 840                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 841                 }
 842
 843                 status = smbd_check_access_rights(conn,
 844                                 smb_fname,
 845                                 access_mask);
 846
 847                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
 848                                 fsp->posix_open &&
 849                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
 850                         /* This is a POSIX stat open for delete
 851                          * or rename on a symlink that points
 852                          * nowhere. Allow. */
 853                         DEBUG(10,("open_file: allowing POSIX "
 854                                   "open on bad symlink %s\n",
 855                                   smb_fname_str_dbg(smb_fname)));
 856                         status = NT_STATUS_OK;
 857                 }
 858
 859                 if (!NT_STATUS_IS_OK(status)) {
 860                         DEBUG(10,("open_file: "
 861                                 "smbd_check_access_rights on file "
 862                                 "%s returned %s\n",
 863                                 smb_fname_str_dbg(smb_fname),
 864                                 nt_errstr(status) ));
 865                         return status;
 866                 }
 867         }
 868
 869         /*
 870          * POSIX allows read-only opens of directories. We don't
 871          * want to do this (we use a different code path for this)
 872          * so catch a directory open and return an EISDIR. JRA.
 873          */
 874
 875         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
 876                 fd_close(fsp);
 877                 errno = EISDIR;
 878                 return NT_STATUS_FILE_IS_A_DIRECTORY;
 879         }
 880
 881         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 882         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
 883         fsp->file_pid = req ? req->smbpid : 0;
 884         fsp->can_lock = True;
 885         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
 886         fsp->can_write =
 887                 CAN_WRITE(conn) &&
 888                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
 889         fsp->print_file = NULL;
 890         fsp->modified = False;
 891         fsp->sent_oplock_break = NO_BREAK_SENT;
 892         fsp->is_directory = False;
 893         if (conn->aio_write_behind_list &&
 894             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
 895                        conn->case_sensitive)) {
 896                 fsp->aio_write_behind = True;
 897         }
 898
 899         fsp->wcp = NULL; /* Write cache pointer. */
 900
 901         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
 902                  conn->session_info->unix_info->unix_name,
 903                  smb_fname_str_dbg(smb_fname),
 904                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
 905                  conn->num_files_open));
 906
 907         errno = 0;
 908         return NT_STATUS_OK;
 909 }
 910
 911 /****************************************************************************
 912  Check if we can open a file with a share mode.
 913  Returns True if conflict, False if not.
 914 ****************************************************************************/
 915
 916 static bool share_conflict(struct share_mode_entry *entry,
 917                            uint32 access_mask,
 918                            uint32 share_access)
 919 {
 920         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
 921                   "entry->share_access = 0x%x, "
 922                   "entry->private_options = 0x%x\n",
 923                   (unsigned int)entry->access_mask,
 924                   (unsigned int)entry->share_access,
 925                   (unsigned int)entry->private_options));
 926
 927         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
 928                   (unsigned int)access_mask, (unsigned int)share_access));
 929
 930         if ((entry->access_mask & (FILE_WRITE_DATA|
 931                                    FILE_APPEND_DATA|
 932                                    FILE_READ_DATA|
 933                                    FILE_EXECUTE|
 934                                    DELETE_ACCESS)) == 0) {
 935                 DEBUG(10,("share_conflict: No conflict due to "
 936                           "entry->access_mask = 0x%x\n",
 937                           (unsigned int)entry->access_mask ));
 938                 return False;
 939         }
 940
 941         if ((access_mask & (FILE_WRITE_DATA|
 942                             FILE_APPEND_DATA|
 943                             FILE_READ_DATA|
 944                             FILE_EXECUTE|
 945                             DELETE_ACCESS)) == 0) {
 946                 DEBUG(10,("share_conflict: No conflict due to "
 947                           "access_mask = 0x%x\n",
 948                           (unsigned int)access_mask ));
 949                 return False;
 950         }
 951
 952 #if 1 /* JRA TEST - Superdebug. */
 953 #define CHECK_MASK(num, am, right, sa, share) \
 954         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
 955                 (unsigned int)(num), (unsigned int)(am), \
 956                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
 957         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
 958                 (unsigned int)(num), (unsigned int)(sa), \
 959                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
 960         if (((am) & (right)) && !((sa) & (share))) { \
 961                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 962 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 963                         (unsigned int)(share) )); \
 964                 return True; \
 965         }
 966 #else
 967 #define CHECK_MASK(num, am, right, sa, share) \
 968         if (((am) & (right)) && !((sa) & (share))) { \
 969                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
 970 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
 971                         (unsigned int)(share) )); \
 972                 return True; \
 973         }
 974 #endif
 975
 976         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 977                    share_access, FILE_SHARE_WRITE);
 978         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
 979                    entry->share_access, FILE_SHARE_WRITE);
 980
 981         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
 982                    share_access, FILE_SHARE_READ);
 983         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
 984                    entry->share_access, FILE_SHARE_READ);
 985
 986         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
 987                    share_access, FILE_SHARE_DELETE);
 988         CHECK_MASK(6, access_mask, DELETE_ACCESS,
 989                    entry->share_access, FILE_SHARE_DELETE);
 990
 991         DEBUG(10,("share_conflict: No conflict.\n"));
 992         return False;
 993 }
 994
 995 #if defined(DEVELOPER)
 996 static void validate_my_share_entries(struct smbd_server_connection *sconn,
 997                                       int num,
 998                                       struct share_mode_entry *share_entry)
 999 {
1000         struct server_id self = messaging_server_id(sconn->msg_ctx);
1001         files_struct *fsp;
1002
1003         if (!serverid_equal(&self, &share_entry->pid)) {
1004                 return;
1005         }
1006
1007         if (is_deferred_open_entry(share_entry) &&
1008             !open_was_deferred(sconn, share_entry->op_mid)) {
1009                 char *str = talloc_asprintf(talloc_tos(),
1010                         "Got a deferred entry without a request: "
1011                         "PANIC: %s\n",
1012                         share_mode_str(talloc_tos(), num, share_entry));
1013                 smb_panic(str);
1014         }
1015
1016         if (!is_valid_share_mode_entry(share_entry)) {
1017                 return;
1018         }
1019
1020         fsp = file_find_dif(sconn, share_entry->id,
1021                             share_entry->share_file_id);
1022         if (!fsp) {
1023                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1024                          share_mode_str(talloc_tos(), num, share_entry) ));
1025                 smb_panic("validate_my_share_entries: Cannot match a "
1026                           "share entry with an open file\n");
1027         }
1028
1029         if (is_deferred_open_entry(share_entry)) {
1030                 goto panic;
1031         }
1032
1033         if ((share_entry->op_type == NO_OPLOCK) &&
1034             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1035                 /* Someone has already written to it, but I haven't yet
1036                  * noticed */
1037                 return;
1038         }
1039
1040         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1041                 goto panic;
1042         }
1043
1044         return;
1045
1046  panic:
1047         {
1048                 char *str;
1049                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1050                          share_mode_str(talloc_tos(), num, share_entry) ));
1051                 str = talloc_asprintf(talloc_tos(),
1052                         "validate_my_share_entries: "
1053                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1054                          fsp->fsp_name->base_name,
1055                          (unsigned int)fsp->oplock_type,
1056                          (unsigned int)share_entry->op_type );
1057                 smb_panic(str);
1058         }
1059 }
1060 #endif
1061
1062 bool is_stat_open(uint32 access_mask)
1063 {
1064         return (access_mask &&
1065                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1066                                   FILE_WRITE_ATTRIBUTES))==0) &&
1067                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1068                                  FILE_WRITE_ATTRIBUTES)) != 0));
1069 }
1070
1071 /****************************************************************************
1072  Deal with share modes
1073  Invarient: Share mode must be locked on entry and exit.
1074  Returns -1 on error, or number of share modes on success (may be zero).
1075 ****************************************************************************/
1076
1077 static NTSTATUS open_mode_check(connection_struct *conn,
1078                                 struct share_mode_lock *lck,
1079                                 uint32_t name_hash,
1080                                 uint32 access_mask,
1081                                 uint32 share_access,
1082                                 uint32 create_options,
1083                                 bool *file_existed)
1084 {
1085         int i;
1086
1087         if(lck->data->num_share_modes == 0) {
1088                 return NT_STATUS_OK;
1089         }
1090
1091         /* A delete on close prohibits everything */
1092
1093         if (is_delete_on_close_set(lck, name_hash)) {
1094                 /*
1095                  * Check the delete on close token
1096                  * is valid. It could have been left
1097                  * after a server crash.
1098                  */
1099                 for(i = 0; i < lck->data->num_share_modes; i++) {
1100                         if (!share_mode_stale_pid(lck->data, i)) {
1101
1102                                 *file_existed = true;
1103
1104                                 return NT_STATUS_DELETE_PENDING;
1105                         }
1106                 }
1107                 return NT_STATUS_OK;
1108         }
1109
1110         if (is_stat_open(access_mask)) {
1111                 /* Stat open that doesn't trigger oplock breaks or share mode
1112                  * checks... ! JRA. */
1113                 return NT_STATUS_OK;
1114         }
1115
1116         /*
1117          * Check if the share modes will give us access.
1118          */
1119
1120 #if defined(DEVELOPER)
1121         for(i = 0; i < lck->data->num_share_modes; i++) {
1122                 validate_my_share_entries(conn->sconn, i,
1123                                           &lck->data->share_modes[i]);
1124         }
1125 #endif
1126
1127         /* Now we check the share modes, after any oplock breaks. */
1128         for(i = 0; i < lck->data->num_share_modes; i++) {
1129
1130                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1131                         continue;
1132                 }
1133
1134                 /* someone else has a share lock on it, check to see if we can
1135                  * too */
1136                 if (share_conflict(&lck->data->share_modes[i],
1137                                    access_mask, share_access)) {
1138
1139                         if (share_mode_stale_pid(lck->data, i)) {
1140                                 continue;
1141                         }
1142
1143                         *file_existed = true;
1144
1145                         return NT_STATUS_SHARING_VIOLATION;
1146                 }
1147         }
1148
1149         if (lck->data->num_share_modes != 0) {
1150                 *file_existed = true;
1151         }
1152
1153         return NT_STATUS_OK;
1154 }
1155
1156 static bool is_delete_request(files_struct *fsp) {
1157         return ((fsp->access_mask == DELETE_ACCESS) &&
1158                 (fsp->oplock_type == NO_OPLOCK));
1159 }
1160
1161 /*
1162  * Send a break message to the oplock holder and delay the open for
1163  * our client.
1164  */
1165
1166 static NTSTATUS send_break_message(files_struct *fsp,
1167                                         struct share_mode_entry *exclusive,
1168                                         uint64_t mid,
1169                                         int oplock_request)
1170 {
1171         NTSTATUS status;
1172         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1173
1174         DEBUG(10, ("Sending break request to PID %s\n",
1175                    procid_str_static(&exclusive->pid)));
1176         exclusive->op_mid = mid;
1177
1178         /* Create the message. */
1179         share_mode_entry_to_message(msg, exclusive);
1180
1181         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1182            don't want this set in the share mode struct pointed to by lck. */
1183
1184         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1185                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1186                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1187         }
1188
1189         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1190                                     MSG_SMB_BREAK_REQUEST,
1191                                     (uint8 *)msg,
1192                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1193         if (!NT_STATUS_IS_OK(status)) {
1194                 DEBUG(3, ("Could not send oplock break message: %s\n",
1195                           nt_errstr(status)));
1196         }
1197
1198         return status;
1199 }
1200
1201 /*
1202  * Return share_mode_entry pointers for :
1203  * 1). Batch oplock entry.
1204  * 2). Batch or exclusive oplock entry (may be identical to #1).
1205  * bool have_level2_oplock
1206  * bool have_no_oplock.
1207  * Do internal consistency checks on the share mode for a file.
1208  */
1209
1210 static void find_oplock_types(files_struct *fsp,
1211                                 int oplock_request,
1212                                 const struct share_mode_lock *lck,
1213                                 struct share_mode_entry **pp_batch,
1214                                 struct share_mode_entry **pp_ex_or_batch,
1215                                 bool *got_level2,
1216                                 bool *got_no_oplock)
1217 {
1218         int i;
1219
1220         *pp_batch = NULL;
1221         *pp_ex_or_batch = NULL;
1222         *got_level2 = false;
1223         *got_no_oplock = false;
1224
1225         /* Ignore stat or internal opens, as is done in
1226                 delay_for_batch_oplocks() and
1227                 delay_for_exclusive_oplocks().
1228          */
1229         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1230                 return;
1231         }
1232
1233         for (i=0; i<lck->data->num_share_modes; i++) {
1234                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1235                         continue;
1236                 }
1237
1238                 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1239                                 is_stat_open(lck->data->share_modes[i].access_mask)) {
1240                         /* We ignore stat opens in the table - they
1241                            always have NO_OPLOCK and never get or
1242                            cause breaks. JRA. */
1243                         continue;
1244                 }
1245
1246                 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1247                         /* batch - can only be one. */
1248                         if (share_mode_stale_pid(lck->data, i)) {
1249                                 DEBUG(10, ("Found stale batch oplock\n"));
1250                                 continue;
1251                         }
1252                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1253                                 smb_panic("Bad batch oplock entry.");
1254                         }
1255                         *pp_batch = &lck->data->share_modes[i];
1256                 }
1257
1258                 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1259                         if (share_mode_stale_pid(lck->data, i)) {
1260                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1261                                 continue;
1262                         }
1263                         /* Exclusive or batch - can only be one. */
1264                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1265                                 smb_panic("Bad exclusive or batch oplock entry.");
1266                         }
1267                         *pp_ex_or_batch = &lck->data->share_modes[i];
1268                 }
1269
1270                 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1271                         if (*pp_batch || *pp_ex_or_batch) {
1272                                 if (share_mode_stale_pid(lck->data, i)) {
1273                                         DEBUG(10, ("Found stale LevelII "
1274                                                    "oplock\n"));
1275                                         continue;
1276                                 }
1277                                 smb_panic("Bad levelII oplock entry.");
1278                         }
1279                         *got_level2 = true;
1280                 }
1281
1282                 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1283                         if (*pp_batch || *pp_ex_or_batch) {
1284                                 if (share_mode_stale_pid(lck->data, i)) {
1285                                         DEBUG(10, ("Found stale NO_OPLOCK "
1286                                                    "entry\n"));
1287                                         continue;
1288                                 }
1289                                 smb_panic("Bad no oplock entry.");
1290                         }
1291                         *got_no_oplock = true;
1292                 }
1293         }
1294 }
1295
1296 static bool delay_for_batch_oplocks(files_struct *fsp,
1297                                         uint64_t mid,
1298                                         int oplock_request,
1299                                         struct share_mode_entry *batch_entry)
1300 {
1301         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1302                 return false;
1303         }
1304         if (batch_entry == NULL) {
1305                 return false;
1306         }
1307
1308         /* Found a batch oplock */
1309         send_break_message(fsp, batch_entry, mid, oplock_request);
1310         return true;
1311 }
1312
1313 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1314                                         uint64_t mid,
1315                                         int oplock_request,
1316                                         struct share_mode_entry *ex_entry)
1317 {
1318         bool delay_it;
1319
1320         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1321                 return false;
1322         }
1323         if (ex_entry == NULL) {
1324                 return false;
1325         }
1326
1327         /* Found an exclusive or batch oplock */
1328
1329         delay_it = is_delete_request(fsp) ?
1330                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1331
1332         if (!delay_it) {
1333                 return false;
1334         }
1335
1336         send_break_message(fsp, ex_entry, mid, oplock_request);
1337         return true;
1338 }
1339
1340 static bool file_has_brlocks(files_struct *fsp)
1341 {
1342         struct byte_range_lock *br_lck;
1343
1344         br_lck = brl_get_locks_readonly(fsp);
1345         if (!br_lck)
1346                 return false;
1347
1348         return br_lck->num_locks > 0 ? true : false;
1349 }
1350
1351 static void grant_fsp_oplock_type(files_struct *fsp,
1352                                 int oplock_request,
1353                                 bool got_level2_oplock,
1354                                 bool got_a_none_oplock)
1355 {
1356         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1357                             lp_level2_oplocks(SNUM(fsp->conn));
1358
1359         /* Start by granting what the client asked for,
1360            but ensure no SAMBA_PRIVATE bits can be set. */
1361         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1362
1363         if (oplock_request & INTERNAL_OPEN_ONLY) {
1364                 /* No oplocks on internal open. */
1365                 fsp->oplock_type = NO_OPLOCK;
1366                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1367                         fsp->oplock_type, fsp_str_dbg(fsp)));
1368                 return;
1369         }
1370
1371         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1372                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1373                         fsp_str_dbg(fsp)));
1374                 fsp->oplock_type = NO_OPLOCK;
1375         }
1376
1377         if (is_stat_open(fsp->access_mask)) {
1378                 /* Leave the value already set. */
1379                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1380                         fsp->oplock_type, fsp_str_dbg(fsp)));
1381                 return;
1382         }
1383
1384         /*
1385          * Match what was requested (fsp->oplock_type) with
1386          * what was found in the existing share modes.
1387          */
1388
1389         if (got_a_none_oplock) {
1390                 fsp->oplock_type = NO_OPLOCK;
1391         } else if (got_level2_oplock) {
1392                 if (fsp->oplock_type == NO_OPLOCK ||
1393                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1394                         /* Store a level2 oplock, but don't tell the client */
1395                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1396                 } else {
1397                         fsp->oplock_type = LEVEL_II_OPLOCK;
1398                 }
1399         } else {
1400                 /* All share_mode_entries are placeholders or deferred.
1401                  * Silently upgrade to fake levelII if the client didn't
1402                  * ask for an oplock. */
1403                 if (fsp->oplock_type == NO_OPLOCK) {
1404                         /* Store a level2 oplock, but don't tell the client */
1405                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1406                 }
1407         }
1408
1409         /*
1410          * Don't grant level2 to clients that don't want them
1411          * or if we've turned them off.
1412          */
1413         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1414                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1415         }
1416
1417         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1418                   fsp->oplock_type, fsp_str_dbg(fsp)));
1419 }
1420
1421 static bool request_timed_out(struct timeval request_time,
1422                               struct timeval timeout)
1423 {
1424         struct timeval now, end_time;
1425         GetTimeOfDay(&now);
1426         end_time = timeval_sum(&request_time, &timeout);
1427         return (timeval_compare(&end_time, &now) < 0);
1428 }
1429
1430 /****************************************************************************
1431  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1432 ****************************************************************************/
1433
1434 static void defer_open(struct share_mode_lock *lck,
1435                        struct timeval request_time,
1436                        struct timeval timeout,
1437                        struct smb_request *req,
1438                        struct deferred_open_record *state)
1439 {
1440         struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1441
1442         /* Paranoia check */
1443
1444         if (lck) {
1445                 int i;
1446
1447                 for (i=0; i<lck->data->num_share_modes; i++) {
1448                         struct share_mode_entry *e = &lck->data->share_modes[i];
1449
1450                         if (is_deferred_open_entry(e) &&
1451                             serverid_equal(&self, &e->pid) &&
1452                             (e->op_mid == req->mid)) {
1453                                 DEBUG(0, ("Trying to defer an already deferred "
1454                                         "request: mid=%llu, exiting\n",
1455                                         (unsigned long long)req->mid));
1456                                 exit_server("attempt to defer a deferred request");
1457                         }
1458                 }
1459         }
1460
1461         /* End paranoia check */
1462
1463         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1464                   "open entry for mid %llu\n",
1465                   (unsigned int)request_time.tv_sec,
1466                   (unsigned int)request_time.tv_usec,
1467                   (unsigned long long)req->mid));
1468
1469         if (!push_deferred_open_message_smb(req, request_time, timeout,
1470                                        state->id, (char *)state, sizeof(*state))) {
1471                 exit_server("push_deferred_open_message_smb failed");
1472         }
1473         if (lck) {
1474                 add_deferred_open(lck, req->mid, request_time, self, state->id);
1475         }
1476 }
1477
1478
1479 /****************************************************************************
1480  On overwrite open ensure that the attributes match.
1481 ****************************************************************************/
1482
1483 static bool open_match_attributes(connection_struct *conn,
1484                                   uint32 old_dos_attr,
1485                                   uint32 new_dos_attr,
1486                                   mode_t existing_unx_mode,
1487                                   mode_t new_unx_mode,
1488                                   mode_t *returned_unx_mode)
1489 {
1490         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1491
1492         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1493         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1494
1495         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1496            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1497                 *returned_unx_mode = new_unx_mode;
1498         } else {
1499                 *returned_unx_mode = (mode_t)0;
1500         }
1501
1502         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1503                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1504                   "returned_unx_mode = 0%o\n",
1505                   (unsigned int)old_dos_attr,
1506                   (unsigned int)existing_unx_mode,
1507                   (unsigned int)new_dos_attr,
1508                   (unsigned int)*returned_unx_mode ));
1509
1510         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1511         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1512                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1513                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1514                         return False;
1515                 }
1516         }
1517         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1518                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1519                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1520                         return False;
1521                 }
1522         }
1523         return True;
1524 }
1525
1526 /****************************************************************************
1527  Special FCB or DOS processing in the case of a sharing violation.
1528  Try and find a duplicated file handle.
1529 ****************************************************************************/
1530
1531 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1532                                 connection_struct *conn,
1533                                 files_struct *fsp_to_dup_into,
1534                                 const struct smb_filename *smb_fname,
1535                                 struct file_id id,
1536                                 uint16 file_pid,
1537                                 uint64_t vuid,
1538                                 uint32 access_mask,
1539                                 uint32 share_access,
1540                                 uint32 create_options)
1541 {
1542         files_struct *fsp;
1543
1544         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1545                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1546
1547         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1548             fsp = file_find_di_next(fsp)) {
1549
1550                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1551                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1552                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1553                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1554                           (unsigned int)fsp->file_pid,
1555                           (unsigned int)fsp->fh->private_options,
1556                           (unsigned int)fsp->access_mask ));
1557
1558                 if (fsp->fh->fd != -1 &&
1559                     fsp->vuid == vuid &&
1560                     fsp->file_pid == file_pid &&
1561                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1562                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1563                     (fsp->access_mask & FILE_WRITE_DATA) &&
1564                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1565                     strequal(fsp->fsp_name->stream_name,
1566                              smb_fname->stream_name)) {
1567                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1568                         break;
1569                 }
1570         }
1571
1572         if (!fsp) {
1573                 return NT_STATUS_NOT_FOUND;
1574         }
1575
1576         /* quite an insane set of semantics ... */
1577         if (is_executable(smb_fname->base_name) &&
1578             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1579                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1580                 return NT_STATUS_INVALID_PARAMETER;
1581         }
1582
1583         /* We need to duplicate this fsp. */
1584         return dup_file_fsp(req, fsp, access_mask, share_access,
1585                             create_options, fsp_to_dup_into);
1586 }
1587
1588 static void schedule_defer_open(struct share_mode_lock *lck,
1589                                 struct timeval request_time,
1590                                 struct smb_request *req)
1591 {
1592         struct deferred_open_record state;
1593
1594         /* This is a relative time, added to the absolute
1595            request_time value to get the absolute timeout time.
1596            Note that if this is the second or greater time we enter
1597            this codepath for this particular request mid then
1598            request_time is left as the absolute time of the *first*
1599            time this request mid was processed. This is what allows
1600            the request to eventually time out. */
1601
1602         struct timeval timeout;
1603
1604         /* Normally the smbd we asked should respond within
1605          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1606          * the client did, give twice the timeout as a safety
1607          * measure here in case the other smbd is stuck
1608          * somewhere else. */
1609
1610         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1611
1612         /* Nothing actually uses state.delayed_for_oplocks
1613            but it's handy to differentiate in debug messages
1614            between a 30 second delay due to oplock break, and
1615            a 1 second delay for share mode conflicts. */
1616
1617         state.delayed_for_oplocks = True;
1618         state.async_open = false;
1619         state.id = lck->data->id;
1620
1621         if (!request_timed_out(request_time, timeout)) {
1622                 defer_open(lck, request_time, timeout, req, &state);
1623         }
1624 }
1625
1626 /****************************************************************************
1627  Reschedule an open call that went asynchronous.
1628 ****************************************************************************/
1629
1630 static void schedule_async_open(struct timeval request_time,
1631                                 struct smb_request *req)
1632 {
1633         struct deferred_open_record state;
1634         struct timeval timeout;
1635
1636         timeout = timeval_set(20, 0);
1637
1638         ZERO_STRUCT(state);
1639         state.delayed_for_oplocks = false;
1640         state.async_open = true;
1641
1642         if (!request_timed_out(request_time, timeout)) {
1643                 defer_open(NULL, request_time, timeout, req, &state);
1644         }
1645 }
1646
1647 /****************************************************************************
1648  Work out what access_mask to use from what the client sent us.
1649 ****************************************************************************/
1650
1651 static NTSTATUS smbd_calculate_maximum_allowed_access(
1652         connection_struct *conn,
1653         const struct smb_filename *smb_fname,
1654         uint32_t *p_access_mask)
1655 {
1656         struct security_descriptor *sd;
1657         uint32_t access_granted;
1658         NTSTATUS status;
1659
1660         if (get_current_uid(conn) == (uid_t)0) {
1661                 *p_access_mask |= FILE_GENERIC_ALL;
1662                 return NT_STATUS_OK;
1663         }
1664
1665         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1666                                     (SECINFO_OWNER |
1667                                      SECINFO_GROUP |
1668                                      SECINFO_DACL),&sd);
1669
1670         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1671                 /*
1672                  * File did not exist
1673                  */
1674                 *p_access_mask = FILE_GENERIC_ALL;
1675                 return NT_STATUS_OK;
1676         }
1677         if (!NT_STATUS_IS_OK(status)) {
1678                 DEBUG(10,("smbd_calculate_access_mask: "
1679                           "Could not get acl on file %s: %s\n",
1680                           smb_fname_str_dbg(smb_fname),
1681                           nt_errstr(status)));
1682                 return NT_STATUS_ACCESS_DENIED;
1683         }
1684
1685         /*
1686          * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1687          * also takes care of owner WRITE_DAC and READ_CONTROL.
1688          */
1689         status = se_file_access_check(sd,
1690                                  get_current_nttok(conn),
1691                                  false,
1692                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1693                                  &access_granted);
1694
1695         TALLOC_FREE(sd);
1696
1697         if (!NT_STATUS_IS_OK(status)) {
1698                 DEBUG(10, ("smbd_calculate_access_mask: "
1699                            "Access denied on file %s: "
1700                            "when calculating maximum access\n",
1701                            smb_fname_str_dbg(smb_fname)));
1702                 return NT_STATUS_ACCESS_DENIED;
1703         }
1704         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1705         return NT_STATUS_OK;
1706 }
1707
1708 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1709                                     const struct smb_filename *smb_fname,
1710                                     uint32_t access_mask,
1711                                     uint32_t *access_mask_out)
1712 {
1713         NTSTATUS status;
1714         uint32_t orig_access_mask = access_mask;
1715         uint32_t rejected_share_access;
1716
1717         /*
1718          * Convert GENERIC bits to specific bits.
1719          */
1720
1721         se_map_generic(&access_mask, &file_generic_mapping);
1722
1723         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1724         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1725
1726                 status = smbd_calculate_maximum_allowed_access(
1727                         conn, smb_fname, &access_mask);
1728
1729                 if (!NT_STATUS_IS_OK(status)) {
1730                         return status;
1731                 }
1732
1733                 access_mask &= conn->share_access;
1734         }
1735
1736         rejected_share_access = access_mask & ~(conn->share_access);
1737
1738         if (rejected_share_access) {
1739                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1740                         "file %s: rejected by share access mask[0x%08X] "
1741                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1742                         smb_fname_str_dbg(smb_fname),
1743                         conn->share_access,
1744                         orig_access_mask, access_mask,
1745                         rejected_share_access));
1746                 return NT_STATUS_ACCESS_DENIED;
1747         }
1748
1749         *access_mask_out = access_mask;
1750         return NT_STATUS_OK;
1751 }
1752
1753 /****************************************************************************
1754  Remove the deferred open entry under lock.
1755 ****************************************************************************/
1756
1757 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1758                                 struct server_id pid)
1759 {
1760         struct share_mode_lock *lck = get_existing_share_mode_lock(
1761                 talloc_tos(), id);
1762         if (lck == NULL) {
1763                 DEBUG(0, ("could not get share mode lock\n"));
1764                 return;
1765         }
1766         del_deferred_open_entry(lck, mid, pid);
1767         TALLOC_FREE(lck);
1768 }
1769
1770 /****************************************************************************
1771  Return true if this is a state pointer to an asynchronous create.
1772 ****************************************************************************/
1773
1774 bool is_deferred_open_async(const void *ptr)
1775 {
1776         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1777
1778         return state->async_open;
1779 }
1780
1781 static bool clear_ads(uint32_t create_disposition)
1782 {
1783         bool ret = false;
1784
1785         switch (create_disposition) {
1786         case FILE_SUPERSEDE:
1787         case FILE_OVERWRITE_IF:
1788         case FILE_OVERWRITE:
1789                 ret = true;
1790                 break;
1791         default:
1792                 break;
1793         }
1794         return ret;
1795 }
1796
1797 static int disposition_to_open_flags(uint32_t create_disposition)
1798 {
1799         int ret = 0;
1800
1801         /*
1802          * Currently we're using FILE_SUPERSEDE as the same as
1803          * FILE_OVERWRITE_IF but they really are
1804          * different. FILE_SUPERSEDE deletes an existing file
1805          * (requiring delete access) then recreates it.
1806          */
1807
1808         switch (create_disposition) {
1809         case FILE_SUPERSEDE:
1810         case FILE_OVERWRITE_IF:
1811                 /*
1812                  * If file exists replace/overwrite. If file doesn't
1813                  * exist create.
1814                  */
1815                 ret = O_CREAT|O_TRUNC;
1816                 break;
1817
1818         case FILE_OPEN:
1819                 /*
1820                  * If file exists open. If file doesn't exist error.
1821                  */
1822                 ret = 0;
1823                 break;
1824
1825         case FILE_OVERWRITE:
1826                 /*
1827                  * If file exists overwrite. If file doesn't exist
1828                  * error.
1829                  */
1830                 ret = O_TRUNC;
1831                 break;
1832
1833         case FILE_CREATE:
1834                 /*
1835                  * If file exists error. If file doesn't exist create.
1836                  */
1837                 ret = O_CREAT|O_EXCL;
1838                 break;
1839
1840         case FILE_OPEN_IF:
1841                 /*
1842                  * If file exists open. If file doesn't exist create.
1843                  */
1844                 ret = O_CREAT;
1845                 break;
1846         }
1847         return ret;
1848 }
1849
1850 /****************************************************************************
1851  Open a file with a share mode. Passed in an already created files_struct *.
1852 ****************************************************************************/
1853
1854 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1855                             struct smb_request *req,
1856                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1857                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1858                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1859                             uint32 create_options,      /* options such as delete on close. */
1860                             uint32 new_dos_attributes,  /* attributes used for new file. */
1861                             int oplock_request,         /* internal Samba oplock codes. */
1862                                                         /* Information (FILE_EXISTS etc.) */
1863                             uint32_t private_flags,     /* Samba specific flags. */
1864                             int *pinfo,
1865                             files_struct *fsp)
1866 {
1867         struct smb_filename *smb_fname = fsp->fsp_name;
1868         int flags=0;
1869         int flags2=0;
1870         bool file_existed = VALID_STAT(smb_fname->st);
1871         bool def_acl = False;
1872         bool posix_open = False;
1873         bool new_file_created = False;
1874         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1875         mode_t new_unx_mode = (mode_t)0;
1876         mode_t unx_mode = (mode_t)0;
1877         int info;
1878         uint32 existing_dos_attributes = 0;
1879         struct timeval request_time = timeval_zero();
1880         struct share_mode_lock *lck = NULL;
1881         uint32 open_access_mask = access_mask;
1882         NTSTATUS status;
1883         char *parent_dir;
1884         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1885
1886         if (conn->printer) {
1887                 /*
1888                  * Printers are handled completely differently.
1889                  * Most of the passed parameters are ignored.
1890                  */
1891
1892                 if (pinfo) {
1893                         *pinfo = FILE_WAS_CREATED;
1894                 }
1895
1896                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1897                            smb_fname_str_dbg(smb_fname)));
1898
1899                 if (!req) {
1900                         DEBUG(0,("open_file_ntcreate: printer open without "
1901                                 "an SMB request!\n"));
1902                         return NT_STATUS_INTERNAL_ERROR;
1903                 }
1904
1905                 return print_spool_open(fsp, smb_fname->base_name,
1906                                         req->vuid);
1907         }
1908
1909         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1910                             NULL)) {
1911                 return NT_STATUS_NO_MEMORY;
1912         }
1913
1914         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1915                 posix_open = True;
1916                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1917                 new_dos_attributes = 0;
1918         } else {
1919                 /* Windows allows a new file to be created and
1920                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1921                    sent by the client. Do the same. */
1922
1923                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1924
1925                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1926                  * created new. */
1927                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1928                                      smb_fname, parent_dir);
1929         }
1930
1931         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1932                    "access_mask=0x%x share_access=0x%x "
1933                    "create_disposition = 0x%x create_options=0x%x "
1934                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1935                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1936                    access_mask, share_access, create_disposition,
1937                    create_options, (unsigned int)unx_mode, oplock_request,
1938                    (unsigned int)private_flags));
1939
1940         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1941                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1942                 return NT_STATUS_INTERNAL_ERROR;
1943         }
1944
1945         /*
1946          * Only non-internal opens can be deferred at all
1947          */
1948
1949         if (req) {
1950                 void *ptr;
1951                 if (get_deferred_open_message_state(req,
1952                                 &request_time,
1953                                 &ptr)) {
1954                         /* Remember the absolute time of the original
1955                            request with this mid. We'll use it later to
1956                            see if this has timed out. */
1957
1958                         /* If it was an async create retry, the file
1959                            didn't exist. */
1960
1961                         if (is_deferred_open_async(ptr)) {
1962                                 SET_STAT_INVALID(smb_fname->st);
1963                                 file_existed = false;
1964                         } else {
1965                                 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1966                                 /* Remove the deferred open entry under lock. */
1967                                 remove_deferred_open_entry(
1968                                         state->id, req->mid,
1969                                         messaging_server_id(req->sconn->msg_ctx));
1970                         }
1971
1972                         /* Ensure we don't reprocess this message. */
1973                         remove_deferred_open_message_smb(req->sconn, req->mid);
1974                 }
1975         }
1976
1977         if (!posix_open) {
1978                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1979                 if (file_existed) {
1980                         existing_dos_attributes = dos_mode(conn, smb_fname);
1981                 }
1982         }
1983
1984         /* ignore any oplock requests if oplocks are disabled */
1985         if (!lp_oplocks(SNUM(conn)) ||
1986             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1987                 /* Mask off everything except the private Samba bits. */
1988                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1989         }
1990
1991         /* this is for OS/2 long file names - say we don't support them */
1992         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1993                 /* OS/2 Workplace shell fix may be main code stream in a later
1994                  * release. */
1995                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1996                          "supported.\n"));
1997                 if (use_nt_status()) {
1998                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1999                 }
2000                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2001         }
2002
2003         switch( create_disposition ) {
2004                 case FILE_OPEN:
2005                         /* If file exists open. If file doesn't exist error. */
2006                         if (!file_existed) {
2007                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2008                                          "requested for file %s and file "
2009                                          "doesn't exist.\n",
2010                                          smb_fname_str_dbg(smb_fname)));
2011                                 errno = ENOENT;
2012                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2013                         }
2014                         break;
2015
2016                 case FILE_OVERWRITE:
2017                         /* If file exists overwrite. If file doesn't exist
2018                          * error. */
2019                         if (!file_existed) {
2020                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2021                                          "requested for file %s and file "
2022                                          "doesn't exist.\n",
2023                                          smb_fname_str_dbg(smb_fname) ));
2024                                 errno = ENOENT;
2025                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2026                         }
2027                         break;
2028
2029                 case FILE_CREATE:
2030                         /* If file exists error. If file doesn't exist
2031                          * create. */
2032                         if (file_existed) {
2033                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2034                                          "requested for file %s and file "
2035                                          "already exists.\n",
2036                                          smb_fname_str_dbg(smb_fname)));
2037                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2038                                         errno = EISDIR;
2039                                 } else {
2040                                         errno = EEXIST;
2041                                 }
2042                                 return map_nt_error_from_unix(errno);
2043                         }
2044                         break;
2045
2046                 case FILE_SUPERSEDE:
2047                 case FILE_OVERWRITE_IF:
2048                 case FILE_OPEN_IF:
2049                         break;
2050                 default:
2051                         return NT_STATUS_INVALID_PARAMETER;
2052         }
2053
2054         flags2 = disposition_to_open_flags(create_disposition);
2055
2056         /* We only care about matching attributes on file exists and
2057          * overwrite. */
2058
2059         if (!posix_open && file_existed &&
2060             ((create_disposition == FILE_OVERWRITE) ||
2061              (create_disposition == FILE_OVERWRITE_IF))) {
2062                 if (!open_match_attributes(conn, existing_dos_attributes,
2063                                            new_dos_attributes,
2064                                            smb_fname->st.st_ex_mode,
2065                                            unx_mode, &new_unx_mode)) {
2066                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2067                                  "for file %s (%x %x) (0%o, 0%o)\n",
2068                                  smb_fname_str_dbg(smb_fname),
2069                                  existing_dos_attributes,
2070                                  new_dos_attributes,
2071                                  (unsigned int)smb_fname->st.st_ex_mode,
2072                                  (unsigned int)unx_mode ));
2073                         errno = EACCES;
2074                         return NT_STATUS_ACCESS_DENIED;
2075                 }
2076         }
2077
2078         status = smbd_calculate_access_mask(conn, smb_fname,
2079                                         access_mask,
2080                                         &access_mask);
2081         if (!NT_STATUS_IS_OK(status)) {
2082                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2083                         "on file %s returned %s\n",
2084                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2085                 return status;
2086         }
2087
2088         open_access_mask = access_mask;
2089
2090         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2091                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2092         }
2093
2094         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2095                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2096                     access_mask));
2097
2098         /*
2099          * Note that we ignore the append flag as append does not
2100          * mean the same thing under DOS and Unix.
2101          */
2102
2103         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2104                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2105                 /* DENY_DOS opens are always underlying read-write on the
2106                    file handle, no matter what the requested access mask
2107                     says. */
2108                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2109                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2110                         flags = O_RDWR;
2111                 } else {
2112                         flags = O_WRONLY;
2113                 }
2114         } else {
2115                 flags = O_RDONLY;
2116         }
2117
2118         /*
2119          * Currently we only look at FILE_WRITE_THROUGH for create options.
2120          */
2121
2122 #if defined(O_SYNC)
2123         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2124                 flags2 |= O_SYNC;
2125         }
2126 #endif /* O_SYNC */
2127
2128         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2129                 flags2 |= O_APPEND;
2130         }
2131
2132         if (!posix_open && !CAN_WRITE(conn)) {
2133                 /*
2134                  * We should really return a permission denied error if either
2135                  * O_CREAT or O_TRUNC are set, but for compatibility with
2136                  * older versions of Samba we just AND them out.
2137                  */
2138                 flags2 &= ~(O_CREAT|O_TRUNC);
2139         }
2140
2141         /*
2142          * Ensure we can't write on a read-only share or file.
2143          */
2144
2145         if (flags != O_RDONLY && file_existed &&
2146             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2147                 DEBUG(5,("open_file_ntcreate: write access requested for "
2148                          "file %s on read only %s\n",
2149                          smb_fname_str_dbg(smb_fname),
2150                          !CAN_WRITE(conn) ? "share" : "file" ));
2151                 errno = EACCES;
2152                 return NT_STATUS_ACCESS_DENIED;
2153         }
2154
2155         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2156         fsp->share_access = share_access;
2157         fsp->fh->private_options = private_flags;
2158         fsp->access_mask = open_access_mask; /* We change this to the
2159                                               * requested access_mask after
2160                                               * the open is done. */
2161         fsp->posix_open = posix_open;
2162
2163         /* Ensure no SAMBA_PRIVATE bits can be set. */
2164         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2165
2166         if (timeval_is_zero(&request_time)) {
2167                 request_time = fsp->open_time;
2168         }
2169
2170         if (file_existed) {
2171                 struct share_mode_entry *batch_entry = NULL;
2172                 struct share_mode_entry *exclusive_entry = NULL;
2173                 bool got_level2_oplock = false;
2174                 bool got_a_none_oplock = false;
2175                 struct file_id id;
2176
2177                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2178                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2179
2180                 lck = get_share_mode_lock(talloc_tos(), id,
2181                                           conn->connectpath,
2182                                           smb_fname, &old_write_time);
2183                 if (lck == NULL) {
2184                         DEBUG(0, ("Could not get share mode lock\n"));
2185                         return NT_STATUS_SHARING_VIOLATION;
2186                 }
2187
2188                 /* Get the types we need to examine. */
2189                 find_oplock_types(fsp,
2190                                 oplock_request,
2191                                 lck,
2192                                 &batch_entry,
2193                                 &exclusive_entry,
2194                                 &got_level2_oplock,
2195                                 &got_a_none_oplock);
2196
2197                 /* First pass - send break only on batch oplocks. */
2198                 if ((req != NULL) &&
2199                                 delay_for_batch_oplocks(fsp,
2200                                         req->mid,
2201                                         oplock_request,
2202                                         batch_entry)) {
2203                         schedule_defer_open(lck, request_time, req);
2204                         TALLOC_FREE(lck);
2205                         return NT_STATUS_SHARING_VIOLATION;
2206                 }
2207
2208                 /* Use the client requested access mask here, not the one we
2209                  * open with. */
2210                 status = open_mode_check(conn, lck, fsp->name_hash,
2211                                         access_mask, share_access,
2212                                          create_options, &file_existed);
2213
2214                 if (NT_STATUS_IS_OK(status)) {
2215                         /* We might be going to allow this open. Check oplock
2216                          * status again. */
2217                         /* Second pass - send break for both batch or
2218                          * exclusive oplocks. */
2219                         if ((req != NULL) &&
2220                                         delay_for_exclusive_oplocks(
2221                                                 fsp,
2222                                                 req->mid,
2223                                                 oplock_request,
2224                                                 exclusive_entry)) {
2225                                 schedule_defer_open(lck, request_time, req);
2226                                 TALLOC_FREE(lck);
2227                                 return NT_STATUS_SHARING_VIOLATION;
2228                         }
2229                 }
2230
2231                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2232                         /* DELETE_PENDING is not deferred for a second */
2233                         TALLOC_FREE(lck);
2234                         return status;
2235                 }
2236
2237                 grant_fsp_oplock_type(fsp,
2238                                 oplock_request,
2239                                 got_level2_oplock,
2240                                 got_a_none_oplock);
2241
2242                 if (!NT_STATUS_IS_OK(status)) {
2243                         uint32 can_access_mask;
2244                         bool can_access = True;
2245
2246                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2247
2248                         /* Check if this can be done with the deny_dos and fcb
2249                          * calls. */
2250                         if (private_flags &
2251                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2252                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2253                                 if (req == NULL) {
2254                                         DEBUG(0, ("DOS open without an SMB "
2255                                                   "request!\n"));
2256                                         TALLOC_FREE(lck);
2257                                         return NT_STATUS_INTERNAL_ERROR;
2258                                 }
2259
2260                                 /* Use the client requested access mask here,
2261                                  * not the one we open with. */
2262                                 status = fcb_or_dos_open(req,
2263                                                         conn,
2264                                                         fsp,
2265                                                         smb_fname,
2266                                                         id,
2267                                                         req->smbpid,
2268                                                         req->vuid,
2269                                                         access_mask,
2270                                                         share_access,
2271                                                         create_options);
2272
2273                                 if (NT_STATUS_IS_OK(status)) {
2274                                         TALLOC_FREE(lck);
2275                                         if (pinfo) {
2276                                                 *pinfo = FILE_WAS_OPENED;
2277                                         }
2278                                         return NT_STATUS_OK;
2279                                 }
2280                         }
2281
2282                         /*
2283                          * This next line is a subtlety we need for
2284                          * MS-Access. If a file open will fail due to share
2285                          * permissions and also for security (access) reasons,
2286                          * we need to return the access failed error, not the
2287                          * share error. We can't open the file due to kernel
2288                          * oplock deadlock (it's possible we failed above on
2289                          * the open_mode_check()) so use a userspace check.
2290                          */
2291
2292                         if (flags & O_RDWR) {
2293                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2294                         } else if (flags & O_WRONLY) {
2295                                 can_access_mask = FILE_WRITE_DATA;
2296                         } else {
2297                                 can_access_mask = FILE_READ_DATA;
2298                         }
2299
2300                         if (((can_access_mask & FILE_WRITE_DATA) &&
2301                                 !CAN_WRITE(conn)) ||
2302                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2303                                                 smb_fname, can_access_mask))) {
2304                                 can_access = False;
2305                         }
2306
2307                         /*
2308                          * If we're returning a share violation, ensure we
2309                          * cope with the braindead 1 second delay.
2310                          */
2311
2312                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2313                             lp_defer_sharing_violations()) {
2314                                 struct timeval timeout;
2315                                 struct deferred_open_record state;
2316                                 int timeout_usecs;
2317
2318                                 /* this is a hack to speed up torture tests
2319                                    in 'make test' */
2320                                 timeout_usecs = lp_parm_int(SNUM(conn),
2321                                                             "smbd","sharedelay",
2322                                                             SHARING_VIOLATION_USEC_WAIT);
2323
2324                                 /* This is a relative time, added to the absolute
2325                                    request_time value to get the absolute timeout time.
2326                                    Note that if this is the second or greater time we enter
2327                                    this codepath for this particular request mid then
2328                                    request_time is left as the absolute time of the *first*
2329                                    time this request mid was processed. This is what allows
2330                                    the request to eventually time out. */
2331
2332                                 timeout = timeval_set(0, timeout_usecs);
2333
2334                                 /* Nothing actually uses state.delayed_for_oplocks
2335                                    but it's handy to differentiate in debug messages
2336                                    between a 30 second delay due to oplock break, and
2337                                    a 1 second delay for share mode conflicts. */
2338
2339                                 state.delayed_for_oplocks = False;
2340                                 state.async_open = false;
2341                                 state.id = id;
2342
2343                                 if ((req != NULL)
2344                                     && !request_timed_out(request_time,
2345                                                           timeout)) {
2346                                         defer_open(lck, request_time, timeout,
2347                                                    req, &state);
2348                                 }
2349                         }
2350
2351                         TALLOC_FREE(lck);
2352                         if (can_access) {
2353                                 /*
2354                                  * We have detected a sharing violation here
2355                                  * so return the correct error code
2356                                  */
2357                                 status = NT_STATUS_SHARING_VIOLATION;
2358                         } else {
2359                                 status = NT_STATUS_ACCESS_DENIED;
2360                         }
2361                         return status;
2362                 }
2363
2364                 /*
2365                  * We exit this block with the share entry *locked*.....
2366                  */
2367         }
2368
2369         SMB_ASSERT(!file_existed || (lck != NULL));
2370
2371         /*
2372          * Ensure we pay attention to default ACLs on directories if required.
2373          */
2374
2375         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2376             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2377                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2378         }
2379
2380         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2381                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2382                  (unsigned int)flags, (unsigned int)flags2,
2383                  (unsigned int)unx_mode, (unsigned int)access_mask,
2384                  (unsigned int)open_access_mask));
2385
2386         /*
2387          * open_file strips any O_TRUNC flags itself.
2388          */
2389
2390         fsp_open = open_file(fsp, conn, req, parent_dir,
2391                              flags|flags2, unx_mode, access_mask,
2392                              open_access_mask, &new_file_created);
2393
2394         if (!NT_STATUS_IS_OK(fsp_open)) {
2395                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2396                         schedule_async_open(request_time, req);
2397                 }
2398                 TALLOC_FREE(lck);
2399                 return fsp_open;
2400         }
2401
2402         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2403                 /*
2404                  * The file did exist, but some other (local or NFS)
2405                  * process either renamed/unlinked and re-created the
2406                  * file with different dev/ino after we walked the path,
2407                  * but before we did the open. We could retry the
2408                  * open but it's a rare enough case it's easier to
2409                  * just fail the open to prevent creating any problems
2410                  * in the open file db having the wrong dev/ino key.
2411                  */
2412                 TALLOC_FREE(lck);
2413                 fd_close(fsp);
2414                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2415                         "Old (dev=0x%llu, ino =0x%llu). "
2416                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2417                         " with NT_STATUS_ACCESS_DENIED.\n",
2418                          smb_fname_str_dbg(smb_fname),
2419                          (unsigned long long)saved_stat.st_ex_dev,
2420                          (unsigned long long)saved_stat.st_ex_ino,
2421                          (unsigned long long)smb_fname->st.st_ex_dev,
2422                          (unsigned long long)smb_fname->st.st_ex_ino));
2423                 return NT_STATUS_ACCESS_DENIED;
2424         }
2425
2426         if (!file_existed) {
2427                 struct share_mode_entry *batch_entry = NULL;
2428                 struct share_mode_entry *exclusive_entry = NULL;
2429                 bool got_level2_oplock = false;
2430                 bool got_a_none_oplock = false;
2431                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2432                 struct file_id id;
2433                 /*
2434                  * Deal with the race condition where two smbd's detect the
2435                  * file doesn't exist and do the create at the same time. One
2436                  * of them will win and set a share mode, the other (ie. this
2437                  * one) should check if the requested share mode for this
2438                  * create is allowed.
2439                  */
2440
2441                 /*
2442                  * Now the file exists and fsp is successfully opened,
2443                  * fsp->dev and fsp->inode are valid and should replace the
2444                  * dev=0,inode=0 from a non existent file. Spotted by
2445                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2446                  */
2447
2448                 id = fsp->file_id;
2449
2450                 lck = get_share_mode_lock(talloc_tos(), id,
2451                                           conn->connectpath,
2452                                           smb_fname, &old_write_time);
2453
2454                 if (lck == NULL) {
2455                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2456                                   "mode lock for %s\n",
2457                                   smb_fname_str_dbg(smb_fname)));
2458                         fd_close(fsp);
2459                         return NT_STATUS_SHARING_VIOLATION;
2460                 }
2461
2462                 /* Get the types we need to examine. */
2463                 find_oplock_types(fsp,
2464                                 oplock_request,
2465                                 lck,
2466                                 &batch_entry,
2467                                 &exclusive_entry,
2468                                 &got_level2_oplock,
2469                                 &got_a_none_oplock);
2470
2471                 /* First pass - send break only on batch oplocks. */
2472                 if ((req != NULL) &&
2473                                 delay_for_batch_oplocks(fsp,
2474                                         req->mid,
2475                                         oplock_request,
2476                                         batch_entry)) {
2477                         schedule_defer_open(lck, request_time, req);
2478                         TALLOC_FREE(lck);
2479                         fd_close(fsp);
2480                         return NT_STATUS_SHARING_VIOLATION;
2481                 }
2482
2483                 status = open_mode_check(conn, lck, fsp->name_hash,
2484                                         access_mask, share_access,
2485                                          create_options, &file_existed);
2486
2487                 if (NT_STATUS_IS_OK(status)) {
2488                         /* We might be going to allow this open. Check oplock
2489                          * status again. */
2490                         /* Second pass - send break for both batch or
2491                          * exclusive oplocks. */
2492                         if ((req != NULL) &&
2493                                         delay_for_exclusive_oplocks(
2494                                                 fsp,
2495                                                 req->mid,
2496                                                 oplock_request,
2497                                                 exclusive_entry)) {
2498                                 schedule_defer_open(lck, request_time, req);
2499                                 TALLOC_FREE(lck);
2500                                 fd_close(fsp);
2501                                 return NT_STATUS_SHARING_VIOLATION;
2502                         }
2503                 }
2504
2505                 if (!NT_STATUS_IS_OK(status)) {
2506                         struct deferred_open_record state;
2507
2508                         state.delayed_for_oplocks = False;
2509                         state.async_open = false;
2510                         state.id = id;
2511
2512                         /* Do it all over again immediately. In the second
2513                          * round we will find that the file existed and handle
2514                          * the DELETE_PENDING and FCB cases correctly. No need
2515                          * to duplicate the code here. Essentially this is a
2516                          * "goto top of this function", but don't tell
2517                          * anybody... */
2518
2519                         if (req != NULL) {
2520                                 defer_open(lck, request_time, timeval_zero(),
2521                                            req, &state);
2522                         }
2523                         TALLOC_FREE(lck);
2524                         fd_close(fsp);
2525                         return status;
2526                 }
2527
2528                 grant_fsp_oplock_type(fsp,
2529                                 oplock_request,
2530                                 got_level2_oplock,
2531                                 got_a_none_oplock);
2532
2533                 /*
2534                  * We exit this block with the share entry *locked*.....
2535                  */
2536
2537         }
2538
2539         SMB_ASSERT(lck != NULL);
2540
2541         /* Delete streams if create_disposition requires it */
2542         if (!new_file_created && clear_ads(create_disposition) &&
2543             !is_ntfs_stream_smb_fname(smb_fname)) {
2544                 status = delete_all_streams(conn, smb_fname->base_name);
2545                 if (!NT_STATUS_IS_OK(status)) {
2546                         TALLOC_FREE(lck);
2547                         fd_close(fsp);
2548                         return status;
2549                 }
2550         }
2551
2552         /* note that we ignore failure for the following. It is
2553            basically a hack for NFS, and NFS will never set one of
2554            these only read them. Nobody but Samba can ever set a deny
2555            mode and we have already checked our more authoritative
2556            locking database for permission to set this deny mode. If
2557            the kernel refuses the operations then the kernel is wrong.
2558            note that GPFS supports it as well - jmcd */
2559
2560         if (fsp->fh->fd != -1) {
2561                 int ret_flock;
2562                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2563                 if(ret_flock == -1 ){
2564
2565                         TALLOC_FREE(lck);
2566                         fd_close(fsp);
2567
2568                         return NT_STATUS_SHARING_VIOLATION;
2569                 }
2570         }
2571
2572         /*
2573          * At this point onwards, we can guarentee that the share entry
2574          * is locked, whether we created the file or not, and that the
2575          * deny mode is compatible with all current opens.
2576          */
2577
2578         /*
2579          * If requested, truncate the file.
2580          */
2581
2582         if (!new_file_created && (flags2&O_TRUNC)) {
2583                 /*
2584                  * We are modifying the file after open - update the stat
2585                  * struct..
2586                  */
2587                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2588                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2589                         status = map_nt_error_from_unix(errno);
2590                         TALLOC_FREE(lck);
2591                         fd_close(fsp);
2592                         return status;
2593                 }
2594         }
2595
2596         /*
2597          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2598          * but we don't have to store this - just ignore it on access check.
2599          */
2600         if (conn->sconn->using_smb2) {
2601                 /*
2602                  * SMB2 doesn't return it (according to Microsoft tests).
2603                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2604                  * File created with access = 0x7 (Read, Write, Delete)
2605                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2606                  */
2607                 fsp->access_mask = access_mask;
2608         } else {
2609                 /* But SMB1 does. */
2610                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2611         }
2612
2613         if (file_existed) {
2614                 /* stat opens on existing files don't get oplocks. */
2615                 if (is_stat_open(open_access_mask)) {
2616                         fsp->oplock_type = NO_OPLOCK;
2617                 }
2618         }
2619
2620         if (new_file_created) {
2621                 info = FILE_WAS_CREATED;
2622         } else {
2623                 if (flags2 & O_TRUNC) {
2624                         info = FILE_WAS_OVERWRITTEN;
2625                 } else {
2626                         info = FILE_WAS_OPENED;
2627                 }
2628         }
2629
2630         if (pinfo) {
2631                 *pinfo = info;
2632         }
2633
2634         /*
2635          * Setup the oplock info in both the shared memory and
2636          * file structs.
2637          */
2638
2639         status = set_file_oplock(fsp, fsp->oplock_type);
2640         if (!NT_STATUS_IS_OK(status)) {
2641                 /*
2642                  * Could not get the kernel oplock or there are byte-range
2643                  * locks on the file.
2644                  */
2645                 fsp->oplock_type = NO_OPLOCK;
2646         }
2647
2648         set_share_mode(lck, fsp, get_current_uid(conn),
2649                         req ? req->mid : 0,
2650                        fsp->oplock_type);
2651
2652         /* Handle strange delete on close create semantics. */
2653         if (create_options & FILE_DELETE_ON_CLOSE) {
2654
2655                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2656
2657                 if (!NT_STATUS_IS_OK(status)) {
2658                         /* Remember to delete the mode we just added. */
2659                         del_share_mode(lck, fsp);
2660                         TALLOC_FREE(lck);
2661                         fd_close(fsp);
2662                         return status;
2663                 }
2664                 /* Note that here we set the *inital* delete on close flag,
2665                    not the regular one. The magic gets handled in close. */
2666                 fsp->initial_delete_on_close = True;
2667         }
2668
2669         if (info != FILE_WAS_OPENED) {
2670                 /* Files should be initially set as archive */
2671                 if (lp_map_archive(SNUM(conn)) ||
2672                     lp_store_dos_attributes(SNUM(conn))) {
2673                         if (!posix_open) {
2674                                 if (file_set_dosmode(conn, smb_fname,
2675                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2676                                             parent_dir, true) == 0) {
2677                                         unx_mode = smb_fname->st.st_ex_mode;
2678                                 }
2679                         }
2680                 }
2681         }
2682
2683         /* Determine sparse flag. */
2684         if (posix_open) {
2685                 /* POSIX opens are sparse by default. */
2686                 fsp->is_sparse = true;
2687         } else {
2688                 fsp->is_sparse = (file_existed &&
2689                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2690         }
2691
2692         /*
2693          * Take care of inherited ACLs on created files - if default ACL not
2694          * selected.
2695          */
2696
2697         if (!posix_open && new_file_created && !def_acl) {
2698
2699                 int saved_errno = errno; /* We might get ENOSYS in the next
2700                                           * call.. */
2701
2702                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2703                     errno == ENOSYS) {
2704                         errno = saved_errno; /* Ignore ENOSYS */
2705                 }
2706
2707         } else if (new_unx_mode) {
2708
2709                 int ret = -1;
2710
2711                 /* Attributes need changing. File already existed. */
2712
2713                 {
2714                         int saved_errno = errno; /* We might get ENOSYS in the
2715                                                   * next call.. */
2716                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2717
2718                         if (ret == -1 && errno == ENOSYS) {
2719                                 errno = saved_errno; /* Ignore ENOSYS */
2720                         } else {
2721                                 DEBUG(5, ("open_file_ntcreate: reset "
2722                                           "attributes of file %s to 0%o\n",
2723                                           smb_fname_str_dbg(smb_fname),
2724                                           (unsigned int)new_unx_mode));
2725                                 ret = 0; /* Don't do the fchmod below. */
2726                         }
2727                 }
2728
2729                 if ((ret == -1) &&
2730                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2731                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2732                                   "attributes of file %s to 0%o\n",
2733                                   smb_fname_str_dbg(smb_fname),
2734                                   (unsigned int)new_unx_mode));
2735         }
2736
2737         /* If this is a successful open, we must remove any deferred open
2738          * records. */
2739         if (req != NULL) {
2740                 del_deferred_open_entry(lck, req->mid,
2741                                         messaging_server_id(req->sconn->msg_ctx));
2742         }
2743         TALLOC_FREE(lck);
2744
2745         return NT_STATUS_OK;
2746 }
2747
2748
2749 /****************************************************************************
2750  Open a file for for write to ensure that we can fchmod it.
2751 ****************************************************************************/
2752
2753 NTSTATUS open_file_fchmod(connection_struct *conn,
2754                           struct smb_filename *smb_fname,
2755                           files_struct **result)
2756 {
2757         if (!VALID_STAT(smb_fname->st)) {
2758                 return NT_STATUS_INVALID_PARAMETER;
2759         }
2760
2761         return SMB_VFS_CREATE_FILE(
2762                 conn,                                   /* conn */
2763                 NULL,                                   /* req */
2764                 0,                                      /* root_dir_fid */
2765                 smb_fname,                              /* fname */
2766                 FILE_WRITE_DATA,                        /* access_mask */
2767                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2768                     FILE_SHARE_DELETE),
2769                 FILE_OPEN,                              /* create_disposition*/
2770                 0,                                      /* create_options */
2771                 0,                                      /* file_attributes */
2772                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2773                 0,                                      /* allocation_size */
2774                 0,                                      /* private_flags */
2775                 NULL,                                   /* sd */
2776                 NULL,                                   /* ea_list */
2777                 result,                                 /* result */
2778                 NULL);                                  /* pinfo */
2779 }
2780
2781 static NTSTATUS mkdir_internal(connection_struct *conn,
2782                                struct smb_filename *smb_dname,
2783                                uint32 file_attributes)
2784 {
2785         mode_t mode;
2786         char *parent_dir = NULL;
2787         NTSTATUS status;
2788         bool posix_open = false;
2789         bool need_re_stat = false;
2790         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2791
2792         if(access_mask & ~(conn->share_access)) {
2793                 DEBUG(5,("mkdir_internal: failing share access "
2794                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2795                 return NT_STATUS_ACCESS_DENIED;
2796         }
2797
2798         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2799                             NULL)) {
2800                 return NT_STATUS_NO_MEMORY;
2801         }
2802
2803         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2804                 posix_open = true;
2805                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2806         } else {
2807                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2808         }
2809
2810         status = check_parent_access(conn,
2811                                         smb_dname,
2812                                         access_mask);
2813         if(!NT_STATUS_IS_OK(status)) {
2814                 DEBUG(5,("mkdir_internal: check_parent_access "
2815                         "on directory %s for path %s returned %s\n",
2816                         parent_dir,
2817                         smb_dname->base_name,
2818                         nt_errstr(status) ));
2819                 return status;
2820         }
2821
2822         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2823                 return map_nt_error_from_unix(errno);
2824         }
2825
2826         /* Ensure we're checking for a symlink here.... */
2827         /* We don't want to get caught by a symlink racer. */
2828
2829         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2830                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2831                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2832                 return map_nt_error_from_unix(errno);
2833         }
2834
2835         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2836                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2837                           smb_fname_str_dbg(smb_dname)));
2838                 return NT_STATUS_NOT_A_DIRECTORY;
2839         }
2840
2841         if (lp_store_dos_attributes(SNUM(conn))) {
2842                 if (!posix_open) {
2843                         file_set_dosmode(conn, smb_dname,
2844                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2845                                          parent_dir, true);
2846                 }
2847         }
2848
2849         if (lp_inherit_perms(SNUM(conn))) {
2850                 inherit_access_posix_acl(conn, parent_dir,
2851                                          smb_dname->base_name, mode);
2852                 need_re_stat = true;
2853         }
2854
2855         if (!posix_open) {
2856                 /*
2857                  * Check if high bits should have been set,
2858                  * then (if bits are missing): add them.
2859                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2860                  * dir.
2861                  */
2862                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2863                     (mode & ~smb_dname->st.st_ex_mode)) {
2864                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2865                                       (smb_dname->st.st_ex_mode |
2866                                           (mode & ~smb_dname->st.st_ex_mode)));
2867                         need_re_stat = true;
2868                 }
2869         }
2870
2871         /* Change the owner if required. */
2872         if (lp_inherit_owner(SNUM(conn))) {
2873                 change_dir_owner_to_parent(conn, parent_dir,
2874                                            smb_dname->base_name,
2875                                            &smb_dname->st);
2876                 need_re_stat = true;
2877         }
2878
2879         if (need_re_stat) {
2880                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2881                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2882                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2883                         return map_nt_error_from_unix(errno);
2884                 }
2885         }
2886
2887         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2888                      smb_dname->base_name);
2889
2890         return NT_STATUS_OK;
2891 }
2892
2893 /****************************************************************************
2894  Open a directory from an NT SMB call.
2895 ****************************************************************************/
2896
2897 static NTSTATUS open_directory(connection_struct *conn,
2898                                struct smb_request *req,
2899                                struct smb_filename *smb_dname,
2900                                uint32 access_mask,
2901                                uint32 share_access,
2902                                uint32 create_disposition,
2903                                uint32 create_options,
2904                                uint32 file_attributes,
2905                                int *pinfo,
2906                                files_struct **result)
2907 {
2908         files_struct *fsp = NULL;
2909         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2910         struct share_mode_lock *lck = NULL;
2911         NTSTATUS status;
2912         struct timespec mtimespec;
2913         int info = 0;
2914
2915         if (is_ntfs_stream_smb_fname(smb_dname)) {
2916                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2917                           smb_fname_str_dbg(smb_dname)));
2918                 return NT_STATUS_NOT_A_DIRECTORY;
2919         }
2920
2921         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2922                 /* Ensure we have a directory attribute. */
2923                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2924         }
2925
2926         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2927                  "share_access = 0x%x create_options = 0x%x, "
2928                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2929                  smb_fname_str_dbg(smb_dname),
2930                  (unsigned int)access_mask,
2931                  (unsigned int)share_access,
2932                  (unsigned int)create_options,
2933                  (unsigned int)create_disposition,
2934                  (unsigned int)file_attributes));
2935
2936         status = smbd_calculate_access_mask(conn, smb_dname,
2937                                             access_mask, &access_mask);
2938         if (!NT_STATUS_IS_OK(status)) {
2939                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2940                         "on file %s returned %s\n",
2941                         smb_fname_str_dbg(smb_dname),
2942                         nt_errstr(status)));
2943                 return status;
2944         }
2945
2946         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2947                         !security_token_has_privilege(get_current_nttok(conn),
2948                                         SEC_PRIV_SECURITY)) {
2949                 DEBUG(10, ("open_directory: open on %s "
2950                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2951                         smb_fname_str_dbg(smb_dname)));
2952                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2953         }
2954
2955         switch( create_disposition ) {
2956                 case FILE_OPEN:
2957
2958                         if (!dir_existed) {
2959                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2960                         }
2961
2962                         info = FILE_WAS_OPENED;
2963                         break;
2964
2965                 case FILE_CREATE:
2966
2967                         /* If directory exists error. If directory doesn't
2968                          * exist create. */
2969
2970                         if (dir_existed) {
2971                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2972                                 DEBUG(2, ("open_directory: unable to create "
2973                                           "%s. Error was %s\n",
2974                                           smb_fname_str_dbg(smb_dname),
2975                                           nt_errstr(status)));
2976                                 return status;
2977                         }
2978
2979                         status = mkdir_internal(conn, smb_dname,
2980                                                 file_attributes);
2981
2982                         if (!NT_STATUS_IS_OK(status)) {
2983                                 DEBUG(2, ("open_directory: unable to create "
2984                                           "%s. Error was %s\n",
2985                                           smb_fname_str_dbg(smb_dname),
2986                                           nt_errstr(status)));
2987                                 return status;
2988                         }
2989
2990                         info = FILE_WAS_CREATED;
2991                         break;
2992
2993                 case FILE_OPEN_IF:
2994                         /*
2995                          * If directory exists open. If directory doesn't
2996                          * exist create.
2997                          */
2998
2999                         if (dir_existed) {
3000                                 status = NT_STATUS_OK;
3001                                 info = FILE_WAS_OPENED;
3002                         } else {
3003                                 status = mkdir_internal(conn, smb_dname,
3004                                                 file_attributes);
3005
3006                                 if (NT_STATUS_IS_OK(status)) {
3007                                         info = FILE_WAS_CREATED;
3008                                 } else {
3009                                         /* Cope with create race. */
3010                                         if (!NT_STATUS_EQUAL(status,
3011                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
3012                                                 DEBUG(2, ("open_directory: unable to create "
3013                                                         "%s. Error was %s\n",
3014                                                         smb_fname_str_dbg(smb_dname),
3015                                                         nt_errstr(status)));
3016                                                 return status;
3017                                         }
3018                                         info = FILE_WAS_OPENED;
3019                                 }
3020                         }
3021
3022                         break;
3023
3024                 case FILE_SUPERSEDE:
3025                 case FILE_OVERWRITE:
3026                 case FILE_OVERWRITE_IF:
3027                 default:
3028                         DEBUG(5,("open_directory: invalid create_disposition "
3029                                  "0x%x for directory %s\n",
3030                                  (unsigned int)create_disposition,
3031                                  smb_fname_str_dbg(smb_dname)));
3032                         return NT_STATUS_INVALID_PARAMETER;
3033         }
3034
3035         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3036                 DEBUG(5,("open_directory: %s is not a directory !\n",
3037                          smb_fname_str_dbg(smb_dname)));
3038                 return NT_STATUS_NOT_A_DIRECTORY;
3039         }
3040
3041         if (info == FILE_WAS_OPENED) {
3042                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
3043                 if (!NT_STATUS_IS_OK(status)) {
3044                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
3045                                 "file %s failed with %s\n",
3046                                 smb_fname_str_dbg(smb_dname),
3047                                 nt_errstr(status)));
3048                         return status;
3049                 }
3050         }
3051
3052         status = file_new(req, conn, &fsp);
3053         if(!NT_STATUS_IS_OK(status)) {
3054                 return status;
3055         }
3056
3057         /*
3058          * Setup the files_struct for it.
3059          */
3060
3061         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3062         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3063         fsp->file_pid = req ? req->smbpid : 0;
3064         fsp->can_lock = False;
3065         fsp->can_read = False;
3066         fsp->can_write = False;
3067
3068         fsp->share_access = share_access;
3069         fsp->fh->private_options = 0;
3070         /*
3071          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3072          */
3073         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3074         fsp->print_file = NULL;
3075         fsp->modified = False;
3076         fsp->oplock_type = NO_OPLOCK;
3077         fsp->sent_oplock_break = NO_BREAK_SENT;
3078         fsp->is_directory = True;
3079         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3080         status = fsp_set_smb_fname(fsp, smb_dname);
3081         if (!NT_STATUS_IS_OK(status)) {
3082                 file_free(req, fsp);
3083                 return status;
3084         }
3085
3086         mtimespec = smb_dname->st.st_ex_mtime;
3087
3088 #ifdef O_DIRECTORY
3089         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3090 #else
3091         /* POSIX allows us to open a directory with O_RDONLY. */
3092         status = fd_open(conn, fsp, O_RDONLY, 0);
3093 #endif
3094         if (!NT_STATUS_IS_OK(status)) {
3095                 DEBUG(5, ("open_directory: Could not open fd for "
3096                         "%s (%s)\n",
3097                         smb_fname_str_dbg(smb_dname),
3098                         nt_errstr(status)));
3099                 file_free(req, fsp);
3100                 return status;
3101         }
3102
3103         status = vfs_stat_fsp(fsp);
3104         if (!NT_STATUS_IS_OK(status)) {
3105                 fd_close(fsp);
3106                 file_free(req, fsp);
3107                 return status;
3108         }
3109
3110         /* Ensure there was no race condition. */
3111         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3112                 DEBUG(5,("open_directory: stat struct differs for "
3113                         "directory %s.\n",
3114                         smb_fname_str_dbg(smb_dname)));
3115                 fd_close(fsp);
3116                 file_free(req, fsp);
3117                 return NT_STATUS_ACCESS_DENIED;
3118         }
3119
3120         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3121                                   conn->connectpath, smb_dname,
3122                                   &mtimespec);
3123
3124         if (lck == NULL) {
3125                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3126                           "%s\n", smb_fname_str_dbg(smb_dname)));
3127                 fd_close(fsp);
3128                 file_free(req, fsp);
3129                 return NT_STATUS_SHARING_VIOLATION;
3130         }
3131
3132         status = open_mode_check(conn, lck, fsp->name_hash,
3133                                 access_mask, share_access,
3134                                  create_options, &dir_existed);
3135
3136         if (!NT_STATUS_IS_OK(status)) {
3137                 TALLOC_FREE(lck);
3138                 fd_close(fsp);
3139                 file_free(req, fsp);
3140                 return status;
3141         }
3142
3143         set_share_mode(lck, fsp, get_current_uid(conn),
3144                         req ? req->mid : 0, NO_OPLOCK);
3145
3146         /* For directories the delete on close bit at open time seems
3147            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3148         if (create_options & FILE_DELETE_ON_CLOSE) {
3149                 status = can_set_delete_on_close(fsp, 0);
3150                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3151                         TALLOC_FREE(lck);
3152                         fd_close(fsp);
3153                         file_free(req, fsp);
3154                         return status;
3155                 }
3156
3157                 if (NT_STATUS_IS_OK(status)) {
3158                         /* Note that here we set the *inital* delete on close flag,
3159                            not the regular one. The magic gets handled in close. */
3160                         fsp->initial_delete_on_close = True;
3161                 }
3162         }
3163
3164         TALLOC_FREE(lck);
3165
3166         if (pinfo) {
3167                 *pinfo = info;
3168         }
3169
3170         *result = fsp;
3171         return NT_STATUS_OK;
3172 }
3173
3174 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3175                           struct smb_filename *smb_dname)
3176 {
3177         NTSTATUS status;
3178         files_struct *fsp;
3179
3180         status = SMB_VFS_CREATE_FILE(
3181                 conn,                                   /* conn */
3182                 req,                                    /* req */
3183                 0,                                      /* root_dir_fid */
3184                 smb_dname,                              /* fname */
3185                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3186                 FILE_SHARE_NONE,                        /* share_access */
3187                 FILE_CREATE,                            /* create_disposition*/
3188                 FILE_DIRECTORY_FILE,                    /* create_options */
3189                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3190                 0,                                      /* oplock_request */
3191                 0,                                      /* allocation_size */
3192                 0,                                      /* private_flags */
3193                 NULL,                                   /* sd */
3194                 NULL,                                   /* ea_list */
3195                 &fsp,                                   /* result */
3196                 NULL);                                  /* pinfo */
3197
3198         if (NT_STATUS_IS_OK(status)) {
3199                 close_file(req, fsp, NORMAL_CLOSE);
3200         }
3201
3202         return status;
3203 }
3204
3205 /****************************************************************************
3206  Receive notification that one of our open files has been renamed by another
3207  smbd process.
3208 ****************************************************************************/
3209
3210 void msg_file_was_renamed(struct messaging_context *msg,
3211                           void *private_data,
3212                           uint32_t msg_type,
3213                           struct server_id server_id,
3214                           DATA_BLOB *data)
3215 {
3216         files_struct *fsp;
3217         char *frm = (char *)data->data;
3218         struct file_id id;
3219         const char *sharepath;
3220         const char *base_name;
3221         const char *stream_name;
3222         struct smb_filename *smb_fname = NULL;
3223         size_t sp_len, bn_len;
3224         NTSTATUS status;
3225         struct smbd_server_connection *sconn =
3226                 talloc_get_type_abort(private_data,
3227                 struct smbd_server_connection);
3228
3229         if (data->data == NULL
3230             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3231                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3232                           (int)data->length));
3233                 return;
3234         }
3235
3236         /* Unpack the message. */
3237         pull_file_id_24(frm, &id);
3238         sharepath = &frm[24];
3239         sp_len = strlen(sharepath);
3240         base_name = sharepath + sp_len + 1;
3241         bn_len = strlen(base_name);
3242         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3243
3244         /* stream_name must always be NULL if there is no stream. */
3245         if (stream_name[0] == '\0') {
3246                 stream_name = NULL;
3247         }
3248
3249         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3250                                             stream_name, NULL, &smb_fname);
3251         if (!NT_STATUS_IS_OK(status)) {
3252                 return;
3253         }
3254
3255         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3256                 "file_id %s\n",
3257                 sharepath, smb_fname_str_dbg(smb_fname),
3258                 file_id_string_tos(&id)));
3259
3260         for(fsp = file_find_di_first(sconn, id); fsp;
3261             fsp = file_find_di_next(fsp)) {
3262                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3263
3264                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3265                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3266                                 smb_fname_str_dbg(smb_fname)));
3267                         status = fsp_set_smb_fname(fsp, smb_fname);
3268                         if (!NT_STATUS_IS_OK(status)) {
3269                                 goto out;
3270                         }
3271                 } else {
3272                         /* TODO. JRA. */
3273                         /* Now we have the complete path we can work out if this is
3274                            actually within this share and adjust newname accordingly. */
3275                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3276                                 "not sharepath %s) "
3277                                 "%s from %s -> %s\n",
3278                                 fsp->conn->connectpath,
3279                                 sharepath,
3280                                 fsp_fnum_dbg(fsp),
3281                                 fsp_str_dbg(fsp),
3282                                 smb_fname_str_dbg(smb_fname)));
3283                 }
3284         }
3285  out:
3286         TALLOC_FREE(smb_fname);
3287         return;
3288 }
3289
3290 /*
3291  * If a main file is opened for delete, all streams need to be checked for
3292  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3293  * If that works, delete them all by setting the delete on close and close.
3294  */
3295
3296 NTSTATUS open_streams_for_delete(connection_struct *conn,
3297                                         const char *fname)
3298 {
3299         struct stream_struct *stream_info = NULL;
3300         files_struct **streams = NULL;
3301         int i;
3302         unsigned int num_streams = 0;
3303         TALLOC_CTX *frame = talloc_stackframe();
3304         NTSTATUS status;
3305
3306         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3307                                 &num_streams, &stream_info);
3308
3309         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3310             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3311                 DEBUG(10, ("no streams around\n"));
3312                 TALLOC_FREE(frame);
3313                 return NT_STATUS_OK;
3314         }
3315
3316         if (!NT_STATUS_IS_OK(status)) {
3317                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3318                            nt_errstr(status)));
3319                 goto fail;
3320         }
3321
3322         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3323                    num_streams));
3324
3325         if (num_streams == 0) {
3326                 TALLOC_FREE(frame);
3327                 return NT_STATUS_OK;
3328         }
3329
3330         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3331         if (streams == NULL) {
3332                 DEBUG(0, ("talloc failed\n"));
3333                 status = NT_STATUS_NO_MEMORY;
3334                 goto fail;
3335         }
3336
3337         for (i=0; i<num_streams; i++) {
3338                 struct smb_filename *smb_fname = NULL;
3339
3340                 if (strequal(stream_info[i].name, "::$DATA")) {
3341                         streams[i] = NULL;
3342                         continue;
3343                 }
3344
3345                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3346                                                     stream_info[i].name,
3347                                                     NULL, &smb_fname);
3348                 if (!NT_STATUS_IS_OK(status)) {
3349                         goto fail;
3350                 }
3351
3352                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3353                         DEBUG(10, ("Unable to stat stream: %s\n",
3354                                    smb_fname_str_dbg(smb_fname)));
3355                 }
3356
3357                 status = SMB_VFS_CREATE_FILE(
3358                          conn,                  /* conn */
3359                          NULL,                  /* req */
3360                          0,                     /* root_dir_fid */
3361                          smb_fname,             /* fname */
3362                          DELETE_ACCESS,         /* access_mask */
3363                          (FILE_SHARE_READ |     /* share_access */
3364                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3365                          FILE_OPEN,             /* create_disposition*/
3366                          0,                     /* create_options */
3367                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3368                          0,                     /* oplock_request */
3369                          0,                     /* allocation_size */
3370                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3371                          NULL,                  /* sd */
3372                          NULL,                  /* ea_list */
3373                          &streams[i],           /* result */
3374                          NULL);                 /* pinfo */
3375
3376                 if (!NT_STATUS_IS_OK(status)) {
3377                         DEBUG(10, ("Could not open stream %s: %s\n",
3378                                    smb_fname_str_dbg(smb_fname),
3379                                    nt_errstr(status)));
3380
3381                         TALLOC_FREE(smb_fname);
3382                         break;
3383                 }
3384                 TALLOC_FREE(smb_fname);
3385         }
3386
3387         /*
3388          * don't touch the variable "status" beyond this point :-)
3389          */
3390
3391         for (i -= 1 ; i >= 0; i--) {
3392                 if (streams[i] == NULL) {
3393                         continue;
3394                 }
3395
3396                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3397                            fsp_str_dbg(streams[i])));
3398                 close_file(NULL, streams[i], NORMAL_CLOSE);
3399         }
3400
3401  fail:
3402         TALLOC_FREE(frame);
3403         return status;
3404 }
3405
3406 /*********************************************************************
3407  Create a default ACL by inheriting from the parent. If no inheritance
3408  from the parent available, don't set anything. This will leave the actual
3409  permissions the new file or directory already got from the filesystem
3410  as the NT ACL when read.
3411 *********************************************************************/
3412
3413 static NTSTATUS inherit_new_acl(files_struct *fsp)
3414 {
3415         TALLOC_CTX *ctx = talloc_tos();
3416         char *parent_name = NULL;
3417         struct security_descriptor *parent_desc = NULL;
3418         NTSTATUS status = NT_STATUS_OK;
3419         struct security_descriptor *psd = NULL;
3420         struct dom_sid *owner_sid = NULL;
3421         struct dom_sid *group_sid = NULL;
3422         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3423         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3424         bool inheritable_components = false;
3425         size_t size = 0;
3426
3427         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3428                 return NT_STATUS_NO_MEMORY;
3429         }
3430
3431         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3432                                 parent_name,
3433                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3434                                 &parent_desc);
3435         if (!NT_STATUS_IS_OK(status)) {
3436                 return status;
3437         }
3438
3439         inheritable_components = sd_has_inheritable_components(parent_desc,
3440                                         fsp->is_directory);
3441
3442         if (!inheritable_components && !inherit_owner) {
3443                 /* Nothing to inherit and not setting owner. */
3444                 return NT_STATUS_OK;
3445         }
3446
3447         /* Create an inherited descriptor from the parent. */
3448
3449         if (DEBUGLEVEL >= 10) {
3450                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3451                         fsp_str_dbg(fsp) ));
3452                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3453         }
3454
3455         /* Inherit from parent descriptor if "inherit owner" set. */
3456         if (inherit_owner) {
3457                 owner_sid = parent_desc->owner_sid;
3458                 group_sid = parent_desc->group_sid;
3459         }
3460
3461         if (owner_sid == NULL) {
3462                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3463         }
3464         if (group_sid == NULL) {
3465                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3466         }
3467
3468         status = se_create_child_secdesc(ctx,
3469                         &psd,
3470                         &size,
3471                         parent_desc,
3472                         owner_sid,
3473                         group_sid,
3474                         fsp->is_directory);
3475         if (!NT_STATUS_IS_OK(status)) {
3476                 return status;
3477         }
3478
3479         /* If inheritable_components == false,
3480            se_create_child_secdesc()
3481            creates a security desriptor with a NULL dacl
3482            entry, but with SEC_DESC_DACL_PRESENT. We need
3483            to remove that flag. */
3484
3485         if (!inheritable_components) {
3486                 security_info_sent &= ~SECINFO_DACL;
3487                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3488         }
3489
3490         if (DEBUGLEVEL >= 10) {
3491                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3492                         fsp_str_dbg(fsp) ));
3493                 NDR_PRINT_DEBUG(security_descriptor, psd);
3494         }
3495
3496         if (inherit_owner) {
3497                 /* We need to be root to force this. */
3498                 become_root();
3499         }
3500         status = SMB_VFS_FSET_NT_ACL(fsp,
3501                         security_info_sent,
3502                         psd);
3503         if (inherit_owner) {
3504                 unbecome_root();
3505         }
3506         return status;
3507 }
3508
3509 /*
3510  * Wrapper around open_file_ntcreate and open_directory
3511  */
3512
3513 static NTSTATUS create_file_unixpath(connection_struct *conn,
3514                                      struct smb_request *req,
3515                                      struct smb_filename *smb_fname,
3516                                      uint32_t access_mask,
3517                                      uint32_t share_access,
3518                                      uint32_t create_disposition,
3519                                      uint32_t create_options,
3520                                      uint32_t file_attributes,
3521                                      uint32_t oplock_request,
3522                                      uint64_t allocation_size,
3523                                      uint32_t private_flags,
3524                                      struct security_descriptor *sd,
3525                                      struct ea_list *ea_list,
3526
3527                                      files_struct **result,
3528                                      int *pinfo)
3529 {
3530         int info = FILE_WAS_OPENED;
3531         files_struct *base_fsp = NULL;
3532         files_struct *fsp = NULL;
3533         NTSTATUS status;
3534
3535         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3536                   "file_attributes = 0x%x, share_access = 0x%x, "
3537                   "create_disposition = 0x%x create_options = 0x%x "
3538                   "oplock_request = 0x%x private_flags = 0x%x "
3539                   "ea_list = 0x%p, sd = 0x%p, "
3540                   "fname = %s\n",
3541                   (unsigned int)access_mask,
3542                   (unsigned int)file_attributes,
3543                   (unsigned int)share_access,
3544                   (unsigned int)create_disposition,
3545                   (unsigned int)create_options,
3546                   (unsigned int)oplock_request,
3547                   (unsigned int)private_flags,
3548                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3549
3550         if (create_options & FILE_OPEN_BY_FILE_ID) {
3551                 status = NT_STATUS_NOT_SUPPORTED;
3552                 goto fail;
3553         }
3554
3555         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3556                 status = NT_STATUS_INVALID_PARAMETER;
3557                 goto fail;
3558         }
3559
3560         if (req == NULL) {
3561                 oplock_request |= INTERNAL_OPEN_ONLY;
3562         }
3563
3564         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3565             && (access_mask & DELETE_ACCESS)
3566             && !is_ntfs_stream_smb_fname(smb_fname)) {
3567                 /*
3568                  * We can't open a file with DELETE access if any of the
3569                  * streams is open without FILE_SHARE_DELETE
3570                  */
3571                 status = open_streams_for_delete(conn, smb_fname->base_name);
3572
3573                 if (!NT_STATUS_IS_OK(status)) {
3574                         goto fail;
3575                 }
3576         }
3577
3578         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3579                         !security_token_has_privilege(get_current_nttok(conn),
3580                                         SEC_PRIV_SECURITY)) {
3581                 DEBUG(10, ("create_file_unixpath: open on %s "
3582                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3583                         smb_fname_str_dbg(smb_fname)));
3584                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3585                 goto fail;
3586         }
3587
3588         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3589             && is_ntfs_stream_smb_fname(smb_fname)
3590             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3591                 uint32 base_create_disposition;
3592                 struct smb_filename *smb_fname_base = NULL;
3593
3594                 if (create_options & FILE_DIRECTORY_FILE) {
3595                         status = NT_STATUS_NOT_A_DIRECTORY;
3596                         goto fail;
3597                 }
3598
3599                 switch (create_disposition) {
3600                 case FILE_OPEN:
3601                         base_create_disposition = FILE_OPEN;
3602                         break;
3603                 default:
3604                         base_create_disposition = FILE_OPEN_IF;
3605                         break;
3606                 }
3607
3608                 /* Create an smb_filename with stream_name == NULL. */
3609                 status = create_synthetic_smb_fname(talloc_tos(),
3610                                                     smb_fname->base_name,
3611                                                     NULL, NULL,
3612                                                     &smb_fname_base);
3613                 if (!NT_STATUS_IS_OK(status)) {
3614                         goto fail;
3615                 }
3616
3617                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3618                         DEBUG(10, ("Unable to stat stream: %s\n",
3619                                    smb_fname_str_dbg(smb_fname_base)));
3620                 }
3621
3622                 /* Open the base file. */
3623                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3624                                               FILE_SHARE_READ
3625                                               | FILE_SHARE_WRITE
3626                                               | FILE_SHARE_DELETE,
3627                                               base_create_disposition,
3628                                               0, 0, 0, 0, 0, NULL, NULL,
3629                                               &base_fsp, NULL);
3630                 TALLOC_FREE(smb_fname_base);
3631
3632                 if (!NT_STATUS_IS_OK(status)) {
3633                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3634                                    "%s\n", smb_fname->base_name,
3635                                    nt_errstr(status)));
3636                         goto fail;
3637                 }
3638                 /* we don't need to low level fd */
3639                 fd_close(base_fsp);
3640         }
3641
3642         /*
3643          * If it's a request for a directory open, deal with it separately.
3644          */
3645
3646         if (create_options & FILE_DIRECTORY_FILE) {
3647
3648                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3649                         status = NT_STATUS_INVALID_PARAMETER;
3650                         goto fail;
3651                 }
3652
3653                 /* Can't open a temp directory. IFS kit test. */
3654                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3655                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3656                         status = NT_STATUS_INVALID_PARAMETER;
3657                         goto fail;
3658                 }
3659
3660                 /*
3661                  * We will get a create directory here if the Win32
3662                  * app specified a security descriptor in the
3663                  * CreateDirectory() call.
3664                  */
3665
3666                 oplock_request = 0;
3667                 status = open_directory(
3668                         conn, req, smb_fname, access_mask, share_access,
3669                         create_disposition, create_options, file_attributes,
3670                         &info, &fsp);
3671         } else {
3672
3673                 /*
3674                  * Ordinary file case.
3675                  */
3676
3677                 status = file_new(req, conn, &fsp);
3678                 if(!NT_STATUS_IS_OK(status)) {
3679                         goto fail;
3680                 }
3681
3682                 status = fsp_set_smb_fname(fsp, smb_fname);
3683                 if (!NT_STATUS_IS_OK(status)) {
3684                         goto fail;
3685                 }
3686
3687                 if (base_fsp) {
3688                         /*
3689                          * We're opening the stream element of a
3690                          * base_fsp we already opened. Set up the
3691                          * base_fsp pointer.
3692                          */
3693                         fsp->base_fsp = base_fsp;
3694                 }
3695
3696                 if (allocation_size) {
3697                         fsp->initial_allocation_size = smb_roundup(fsp->conn,
3698                                                         allocation_size);
3699                 }
3700
3701                 status = open_file_ntcreate(conn,
3702                                             req,
3703                                             access_mask,
3704                                             share_access,
3705                                             create_disposition,
3706                                             create_options,
3707                                             file_attributes,
3708                                             oplock_request,
3709                                             private_flags,
3710                                             &info,
3711                                             fsp);
3712
3713                 if(!NT_STATUS_IS_OK(status)) {
3714                         file_free(req, fsp);
3715                         fsp = NULL;
3716                 }
3717
3718                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3719
3720                         /* A stream open never opens a directory */
3721
3722                         if (base_fsp) {
3723                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3724                                 goto fail;
3725                         }
3726
3727                         /*
3728                          * Fail the open if it was explicitly a non-directory
3729                          * file.
3730                          */
3731
3732                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3733                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3734                                 goto fail;
3735                         }
3736
3737                         oplock_request = 0;
3738                         status = open_directory(
3739                                 conn, req, smb_fname, access_mask,
3740                                 share_access, create_disposition,
3741                                 create_options, file_attributes,
3742                                 &info, &fsp);
3743                 }
3744         }
3745
3746         if (!NT_STATUS_IS_OK(status)) {
3747                 goto fail;
3748         }
3749
3750         fsp->base_fsp = base_fsp;
3751
3752         if ((ea_list != NULL) &&
3753             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3754                 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3755                 if (!NT_STATUS_IS_OK(status)) {
3756                         goto fail;
3757                 }
3758         }
3759
3760         if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3761                 status = NT_STATUS_ACCESS_DENIED;
3762                 goto fail;
3763         }
3764
3765         /* Save the requested allocation size. */
3766         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3767                 if (allocation_size
3768                     && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3769                         fsp->initial_allocation_size = smb_roundup(
3770                                 fsp->conn, allocation_size);
3771                         if (fsp->is_directory) {
3772                                 /* Can't set allocation size on a directory. */
3773                                 status = NT_STATUS_ACCESS_DENIED;
3774                                 goto fail;
3775                         }
3776                         if (vfs_allocate_file_space(
3777                                     fsp, fsp->initial_allocation_size) == -1) {
3778                                 status = NT_STATUS_DISK_FULL;
3779                                 goto fail;
3780                         }
3781                 } else {
3782                         fsp->initial_allocation_size = smb_roundup(
3783                                 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3784                 }
3785         } else {
3786                 fsp->initial_allocation_size = 0;
3787         }
3788
3789         if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3790                                 fsp->base_fsp == NULL) {
3791                 if (sd != NULL) {
3792                         /*
3793                          * According to the MS documentation, the only time the security
3794                          * descriptor is applied to the opened file is iff we *created* the
3795                          * file; an existing file stays the same.
3796                          *
3797                          * Also, it seems (from observation) that you can open the file with
3798                          * any access mask but you can still write the sd. We need to override
3799                          * the granted access before we call set_sd
3800                          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3801                          */
3802
3803                         uint32_t sec_info_sent;
3804                         uint32_t saved_access_mask = fsp->access_mask;
3805
3806                         sec_info_sent = get_sec_info(sd);
3807
3808                         fsp->access_mask = FILE_GENERIC_ALL;
3809
3810                         if (sec_info_sent & (SECINFO_OWNER|
3811                                                 SECINFO_GROUP|
3812                                                 SECINFO_DACL|
3813                                                 SECINFO_SACL)) {
3814                                 status = set_sd(fsp, sd, sec_info_sent);
3815                         }
3816
3817                         fsp->access_mask = saved_access_mask;
3818
3819                         if (!NT_STATUS_IS_OK(status)) {
3820                                 goto fail;
3821                         }
3822                 } else if (lp_inherit_acls(SNUM(conn))) {
3823                         /* Inherit from parent. Errors here are not fatal. */
3824                         status = inherit_new_acl(fsp);
3825                         if (!NT_STATUS_IS_OK(status)) {
3826                                 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3827                                         fsp_str_dbg(fsp),
3828                                         nt_errstr(status) ));
3829                         }
3830                 }
3831         }
3832
3833         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3834
3835         *result = fsp;
3836         if (pinfo != NULL) {
3837                 *pinfo = info;
3838         }
3839
3840         smb_fname->st = fsp->fsp_name->st;
3841
3842         return NT_STATUS_OK;
3843
3844  fail:
3845         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3846
3847         if (fsp != NULL) {
3848                 if (base_fsp && fsp->base_fsp == base_fsp) {
3849                         /*
3850                          * The close_file below will close
3851                          * fsp->base_fsp.
3852                          */
3853                         base_fsp = NULL;
3854                 }
3855                 close_file(req, fsp, ERROR_CLOSE);
3856                 fsp = NULL;
3857         }
3858         if (base_fsp != NULL) {
3859                 close_file(req, base_fsp, ERROR_CLOSE);
3860                 base_fsp = NULL;
3861         }
3862         return status;
3863 }
3864
3865 /*
3866  * Calculate the full path name given a relative fid.
3867  */
3868 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3869                                    struct smb_request *req,
3870                                    uint16_t root_dir_fid,
3871                                    const struct smb_filename *smb_fname,
3872                                    struct smb_filename **smb_fname_out)
3873 {
3874         files_struct *dir_fsp;
3875         char *parent_fname = NULL;
3876         char *new_base_name = NULL;
3877         NTSTATUS status;
3878
3879         if (root_dir_fid == 0 || !smb_fname) {
3880                 status = NT_STATUS_INTERNAL_ERROR;
3881                 goto out;
3882         }
3883
3884         dir_fsp = file_fsp(req, root_dir_fid);
3885
3886         if (dir_fsp == NULL) {
3887                 status = NT_STATUS_INVALID_HANDLE;
3888                 goto out;
3889         }
3890
3891         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3892                 status = NT_STATUS_INVALID_HANDLE;
3893                 goto out;
3894         }
3895
3896         if (!dir_fsp->is_directory) {
3897
3898                 /*
3899                  * Check to see if this is a mac fork of some kind.
3900                  */
3901
3902                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3903                     is_ntfs_stream_smb_fname(smb_fname)) {
3904                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3905                         goto out;
3906                 }
3907
3908                 /*
3909                   we need to handle the case when we get a
3910                   relative open relative to a file and the
3911                   pathname is blank - this is a reopen!
3912                   (hint from demyn plantenberg)
3913                 */
3914
3915                 status = NT_STATUS_INVALID_HANDLE;
3916                 goto out;
3917         }
3918
3919         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3920                 /*
3921                  * We're at the toplevel dir, the final file name
3922                  * must not contain ./, as this is filtered out
3923                  * normally by srvstr_get_path and unix_convert
3924                  * explicitly rejects paths containing ./.
3925                  */
3926                 parent_fname = talloc_strdup(talloc_tos(), "");
3927                 if (parent_fname == NULL) {
3928                         status = NT_STATUS_NO_MEMORY;
3929                         goto out;
3930                 }
3931         } else {
3932                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3933
3934                 /*
3935                  * Copy in the base directory name.
3936                  */
3937
3938                 parent_fname = talloc_array(talloc_tos(), char,
3939                     dir_name_len+2);
3940                 if (parent_fname == NULL) {
3941                         status = NT_STATUS_NO_MEMORY;
3942                         goto out;
3943                 }
3944                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3945                     dir_name_len+1);
3946
3947                 /*
3948                  * Ensure it ends in a '/'.
3949                  * We used TALLOC_SIZE +2 to add space for the '/'.
3950                  */
3951
3952                 if(dir_name_len
3953                     && (parent_fname[dir_name_len-1] != '\\')
3954                     && (parent_fname[dir_name_len-1] != '/')) {
3955                         parent_fname[dir_name_len] = '/';
3956                         parent_fname[dir_name_len+1] = '\0';
3957                 }
3958         }
3959
3960         new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3961                                         smb_fname->base_name);
3962         if (new_base_name == NULL) {
3963                 status = NT_STATUS_NO_MEMORY;
3964                 goto out;
3965         }
3966
3967         status = filename_convert(req,
3968                                 conn,
3969                                 req->flags2 & FLAGS2_DFS_PATHNAMES,
3970                                 new_base_name,
3971                                 0,
3972                                 NULL,
3973                                 smb_fname_out);
3974         if (!NT_STATUS_IS_OK(status)) {
3975                 goto out;
3976         }
3977
3978  out:
3979         TALLOC_FREE(parent_fname);
3980         TALLOC_FREE(new_base_name);
3981         return status;
3982 }
3983
3984 NTSTATUS create_file_default(connection_struct *conn,
3985                              struct smb_request *req,
3986                              uint16_t root_dir_fid,
3987                              struct smb_filename *smb_fname,
3988                              uint32_t access_mask,
3989                              uint32_t share_access,
3990                              uint32_t create_disposition,
3991                              uint32_t create_options,
3992                              uint32_t file_attributes,
3993                              uint32_t oplock_request,
3994                              uint64_t allocation_size,
3995                              uint32_t private_flags,
3996                              struct security_descriptor *sd,
3997                              struct ea_list *ea_list,
3998                              files_struct **result,
3999                              int *pinfo)
4000 {
4001         int info = FILE_WAS_OPENED;
4002         files_struct *fsp = NULL;
4003         NTSTATUS status;
4004         bool stream_name = false;
4005
4006         DEBUG(10,("create_file: access_mask = 0x%x "
4007                   "file_attributes = 0x%x, share_access = 0x%x, "
4008                   "create_disposition = 0x%x create_options = 0x%x "
4009                   "oplock_request = 0x%x "
4010                   "private_flags = 0x%x "
4011                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4012                   "fname = %s\n",
4013                   (unsigned int)access_mask,
4014                   (unsigned int)file_attributes,
4015                   (unsigned int)share_access,
4016                   (unsigned int)create_disposition,
4017                   (unsigned int)create_options,
4018                   (unsigned int)oplock_request,
4019                   (unsigned int)private_flags,
4020                   (unsigned int)root_dir_fid,
4021                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
4022
4023         /*
4024          * Calculate the filename from the root_dir_if if necessary.
4025          */
4026
4027         if (root_dir_fid != 0) {
4028                 struct smb_filename *smb_fname_out = NULL;
4029                 status = get_relative_fid_filename(conn, req, root_dir_fid,
4030                                                    smb_fname, &smb_fname_out);
4031                 if (!NT_STATUS_IS_OK(status)) {
4032                         goto fail;
4033                 }
4034                 smb_fname = smb_fname_out;
4035         }
4036
4037         /*
4038          * Check to see if this is a mac fork of some kind.
4039          */
4040
4041         stream_name = is_ntfs_stream_smb_fname(smb_fname);
4042         if (stream_name) {
4043                 enum FAKE_FILE_TYPE fake_file_type;
4044
4045                 fake_file_type = is_fake_file(smb_fname);
4046
4047                 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4048
4049                         /*
4050                          * Here we go! support for changing the disk quotas
4051                          * --metze
4052                          *
4053                          * We need to fake up to open this MAGIC QUOTA file
4054                          * and return a valid FID.
4055                          *
4056                          * w2k close this file directly after openening xp
4057                          * also tries a QUERY_FILE_INFO on the file and then
4058                          * close it
4059                          */
4060                         status = open_fake_file(req, conn, req->vuid,
4061                                                 fake_file_type, smb_fname,
4062                                                 access_mask, &fsp);
4063                         if (!NT_STATUS_IS_OK(status)) {
4064                                 goto fail;
4065                         }
4066
4067                         ZERO_STRUCT(smb_fname->st);
4068                         goto done;
4069                 }
4070
4071                 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4072                         status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4073                         goto fail;
4074                 }
4075         }
4076
4077         if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4078                 int ret;
4079                 smb_fname->stream_name = NULL;
4080                 /* We have to handle this error here. */
4081                 if (create_options & FILE_DIRECTORY_FILE) {
4082                         status = NT_STATUS_NOT_A_DIRECTORY;
4083                         goto fail;
4084                 }
4085                 if (lp_posix_pathnames()) {
4086                         ret = SMB_VFS_LSTAT(conn, smb_fname);
4087                 } else {
4088                         ret = SMB_VFS_STAT(conn, smb_fname);
4089                 }
4090
4091                 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4092                         status = NT_STATUS_FILE_IS_A_DIRECTORY;
4093                         goto fail;
4094                 }
4095         }
4096
4097         status = create_file_unixpath(
4098                 conn, req, smb_fname, access_mask, share_access,
4099                 create_disposition, create_options, file_attributes,
4100                 oplock_request, allocation_size, private_flags,
4101                 sd, ea_list,
4102                 &fsp, &info);
4103
4104         if (!NT_STATUS_IS_OK(status)) {
4105                 goto fail;
4106         }
4107
4108  done:
4109         DEBUG(10, ("create_file: info=%d\n", info));
4110
4111         *result = fsp;
4112         if (pinfo != NULL) {
4113                 *pinfo = info;
4114         }
4115         return NT_STATUS_OK;
4116
4117  fail:
4118         DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4119
4120         if (fsp != NULL) {
4121                 close_file(req, fsp, ERROR_CLOSE);
4122                 fsp = NULL;
4123         }
4124         return status;
4125 }