85b7d9106ddd37ad8c067aa6d0d1aa9ec230b49b
[ira/wip.git] / 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 "smbd/globals.h"
24
25 extern const struct generic_mapping file_generic_mapping;
26
27 struct deferred_open_record {
28         bool delayed_for_oplocks;
29         struct file_id id;
30 };
31
32 static NTSTATUS create_file_unixpath(connection_struct *conn,
33                                      struct smb_request *req,
34                                      struct smb_filename *smb_fname,
35                                      uint32_t access_mask,
36                                      uint32_t share_access,
37                                      uint32_t create_disposition,
38                                      uint32_t create_options,
39                                      uint32_t file_attributes,
40                                      uint32_t oplock_request,
41                                      uint64_t allocation_size,
42                                      struct security_descriptor *sd,
43                                      struct ea_list *ea_list,
44
45                                      files_struct **result,
46                                      int *pinfo);
47
48 /****************************************************************************
49  SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
50 ****************************************************************************/
51
52 NTSTATUS smb1_file_se_access_check(const struct security_descriptor *sd,
53                           const NT_USER_TOKEN *token,
54                           uint32_t access_desired,
55                           uint32_t *access_granted)
56 {
57         return se_access_check(sd,
58                                 token,
59                                 (access_desired & ~FILE_READ_ATTRIBUTES),
60                                 access_granted);
61 }
62
63 /****************************************************************************
64  Check if we have open rights.
65 ****************************************************************************/
66
67 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
68                                 const struct smb_filename *smb_fname,
69                                 uint32_t access_mask,
70                                 uint32_t *access_granted)
71 {
72         /* Check if we have rights to open. */
73         NTSTATUS status;
74         struct security_descriptor *sd;
75
76         *access_granted = 0;
77
78         if (conn->server_info->utok.uid == 0 || conn->admin_user) {
79                 /* I'm sorry sir, I didn't know you were root... */
80                 *access_granted = access_mask;
81                 if (access_mask & SEC_FLAG_MAXIMUM_ALLOWED) {
82                         *access_granted |= FILE_GENERIC_ALL;
83                 }
84                 return NT_STATUS_OK;
85         }
86
87         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
88                         (OWNER_SECURITY_INFORMATION |
89                         GROUP_SECURITY_INFORMATION |
90                         DACL_SECURITY_INFORMATION),&sd);
91
92         if (!NT_STATUS_IS_OK(status)) {
93                 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
94                         "on %s: %s\n",
95                         smb_fname_str_dbg(smb_fname),
96                         nt_errstr(status)));
97                 TALLOC_FREE(sd);
98                 return status;
99         }
100
101         status = smb1_file_se_access_check(sd,
102                                 conn->server_info->ptok,
103                                 access_mask,
104                                 access_granted);
105
106         TALLOC_FREE(sd);
107
108         DEBUG(10,("smbd_check_open_rights: file %s requesting "
109                 "0x%x returning 0x%x (%s)\n",
110                 smb_fname_str_dbg(smb_fname),
111                 (unsigned int)access_mask,
112                 (unsigned int)*access_granted,
113                 nt_errstr(status) ));
114
115         return status;
116 }
117
118 /****************************************************************************
119  fd support routines - attempt to do a dos_open.
120 ****************************************************************************/
121
122 static NTSTATUS fd_open(struct connection_struct *conn,
123                     struct smb_filename *smb_fname,
124                     files_struct *fsp,
125                     int flags,
126                     mode_t mode)
127 {
128         NTSTATUS status = NT_STATUS_OK;
129
130 #ifdef O_NOFOLLOW
131         /* 
132          * Never follow symlinks on a POSIX client. The
133          * client should be doing this.
134          */
135
136         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
137                 flags |= O_NOFOLLOW;
138         }
139 #endif
140
141         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
142         if (fsp->fh->fd == -1) {
143                 status = map_nt_error_from_unix(errno);
144                 if (errno == EMFILE) {
145                         static time_t last_warned = 0L;
146
147                         if (time((time_t *) NULL) > last_warned) {
148                                 DEBUG(0,("Too many open files, unable "
149                                         "to open more!  smbd's max "
150                                         "open files = %d\n",
151                                         lp_max_open_files()));
152                                 last_warned = time((time_t *) NULL);
153                         }
154                 }
155
156         }
157
158         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
159                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
160                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
161
162         return status;
163 }
164
165 /****************************************************************************
166  Close the file associated with a fsp.
167 ****************************************************************************/
168
169 NTSTATUS fd_close(files_struct *fsp)
170 {
171         int ret;
172
173         if (fsp->fh->fd == -1) {
174                 return NT_STATUS_OK; /* What we used to call a stat open. */
175         }
176         if (fsp->fh->ref_count > 1) {
177                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
178         }
179
180         ret = SMB_VFS_CLOSE(fsp);
181         fsp->fh->fd = -1;
182         if (ret == -1) {
183                 return map_nt_error_from_unix(errno);
184         }
185         return NT_STATUS_OK;
186 }
187
188 /****************************************************************************
189  Change the ownership of a file to that of the parent directory.
190  Do this by fd if possible.
191 ****************************************************************************/
192
193 void change_file_owner_to_parent(connection_struct *conn,
194                                         const char *inherit_from_dir,
195                                         files_struct *fsp)
196 {
197         struct smb_filename *smb_fname_parent = NULL;
198         NTSTATUS status;
199         int ret;
200
201         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
202                                             NULL, NULL, &smb_fname_parent);
203         if (!NT_STATUS_IS_OK(status)) {
204                 return;
205         }
206
207         ret = SMB_VFS_STAT(conn, smb_fname_parent);
208         if (ret == -1) {
209                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
210                          "directory %s. Error was %s\n",
211                          smb_fname_str_dbg(smb_fname_parent),
212                          strerror(errno)));
213                 return;
214         }
215
216         become_root();
217         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
218         unbecome_root();
219         if (ret == -1) {
220                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
221                          "file %s to parent directory uid %u. Error "
222                          "was %s\n", fsp_str_dbg(fsp),
223                          (unsigned int)smb_fname_parent->st.st_ex_uid,
224                          strerror(errno) ));
225         }
226
227         DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
228                   "parent directory uid %u.\n", fsp_str_dbg(fsp),
229                   (unsigned int)smb_fname_parent->st.st_ex_uid));
230
231         TALLOC_FREE(smb_fname_parent);
232 }
233
234 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
235                                        const char *inherit_from_dir,
236                                        const char *fname,
237                                        SMB_STRUCT_STAT *psbuf)
238 {
239         struct smb_filename *smb_fname_parent = NULL;
240         struct smb_filename *smb_fname_cwd = NULL;
241         char *saved_dir = NULL;
242         TALLOC_CTX *ctx = talloc_tos();
243         NTSTATUS status = NT_STATUS_OK;
244         int ret;
245
246         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
247                                             &smb_fname_parent);
248         if (!NT_STATUS_IS_OK(status)) {
249                 return status;
250         }
251
252         ret = SMB_VFS_STAT(conn, smb_fname_parent);
253         if (ret == -1) {
254                 status = map_nt_error_from_unix(errno);
255                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
256                          "directory %s. Error was %s\n",
257                          smb_fname_str_dbg(smb_fname_parent),
258                          strerror(errno)));
259                 goto out;
260         }
261
262         /* We've already done an lstat into psbuf, and we know it's a
263            directory. If we can cd into the directory and the dev/ino
264            are the same then we can safely chown without races as
265            we're locking the directory in place by being in it.  This
266            should work on any UNIX (thanks tridge :-). JRA.
267         */
268
269         saved_dir = vfs_GetWd(ctx,conn);
270         if (!saved_dir) {
271                 status = map_nt_error_from_unix(errno);
272                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
273                          "current working directory. Error was %s\n",
274                          strerror(errno)));
275                 goto out;
276         }
277
278         /* Chdir into the new path. */
279         if (vfs_ChDir(conn, fname) == -1) {
280                 status = map_nt_error_from_unix(errno);
281                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
282                          "current working directory to %s. Error "
283                          "was %s\n", fname, strerror(errno) ));
284                 goto chdir;
285         }
286
287         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
288                                             &smb_fname_cwd);
289         if (!NT_STATUS_IS_OK(status)) {
290                 return status;
291         }
292
293         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
294         if (ret == -1) {
295                 status = map_nt_error_from_unix(errno);
296                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
297                          "directory '.' (%s) Error was %s\n",
298                          fname, strerror(errno)));
299                 goto chdir;
300         }
301
302         /* Ensure we're pointing at the same place. */
303         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
304             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
305             smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
306                 DEBUG(0,("change_dir_owner_to_parent: "
307                          "device/inode/mode on directory %s changed. "
308                          "Refusing to chown !\n", fname ));
309                 status = NT_STATUS_ACCESS_DENIED;
310                 goto chdir;
311         }
312
313         become_root();
314         ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
315                             (gid_t)-1);
316         unbecome_root();
317         if (ret == -1) {
318                 status = map_nt_error_from_unix(errno);
319                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
320                           "directory %s to parent directory uid %u. "
321                           "Error was %s\n", fname,
322                           (unsigned int)smb_fname_parent->st.st_ex_uid,
323                           strerror(errno) ));
324                 goto chdir;
325         }
326
327         DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
328                   "directory %s to parent directory uid %u.\n",
329                   fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
330
331  chdir:
332         vfs_ChDir(conn,saved_dir);
333  out:
334         TALLOC_FREE(smb_fname_parent);
335         TALLOC_FREE(smb_fname_cwd);
336         return status;
337 }
338
339 /****************************************************************************
340  Open a file.
341 ****************************************************************************/
342
343 static NTSTATUS open_file(files_struct *fsp,
344                           connection_struct *conn,
345                           struct smb_request *req,
346                           const char *parent_dir,
347                           struct smb_filename *smb_fname,
348                           int flags,
349                           mode_t unx_mode,
350                           uint32 access_mask, /* client requested access mask. */
351                           uint32 open_access_mask) /* what we're actually using in the open. */
352 {
353         NTSTATUS status = NT_STATUS_OK;
354         int accmode = (flags & O_ACCMODE);
355         int local_flags = flags;
356         bool file_existed = VALID_STAT(smb_fname->st);
357
358         fsp->fh->fd = -1;
359         errno = EPERM;
360
361         /* Check permissions */
362
363         /*
364          * This code was changed after seeing a client open request 
365          * containing the open mode of (DENY_WRITE/read-only) with
366          * the 'create if not exist' bit set. The previous code
367          * would fail to open the file read only on a read-only share
368          * as it was checking the flags parameter  directly against O_RDONLY,
369          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
370          * JRA.
371          */
372
373         if (!CAN_WRITE(conn)) {
374                 /* It's a read-only share - fail if we wanted to write. */
375                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
376                         DEBUG(3,("Permission denied opening %s\n",
377                                  smb_fname_str_dbg(smb_fname)));
378                         return NT_STATUS_ACCESS_DENIED;
379                 } else if(flags & O_CREAT) {
380                         /* We don't want to write - but we must make sure that
381                            O_CREAT doesn't create the file if we have write
382                            access into the directory.
383                         */
384                         flags &= ~(O_CREAT|O_EXCL);
385                         local_flags &= ~(O_CREAT|O_EXCL);
386                 }
387         }
388
389         /*
390          * This little piece of insanity is inspired by the
391          * fact that an NT client can open a file for O_RDONLY,
392          * but set the create disposition to FILE_EXISTS_TRUNCATE.
393          * If the client *can* write to the file, then it expects to
394          * truncate the file, even though it is opening for readonly.
395          * Quicken uses this stupid trick in backup file creation...
396          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
397          * for helping track this one down. It didn't bite us in 2.0.x
398          * as we always opened files read-write in that release. JRA.
399          */
400
401         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
402                 DEBUG(10,("open_file: truncate requested on read-only open "
403                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
404                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
405         }
406
407         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
408             (!file_existed && (local_flags & O_CREAT)) ||
409             ((local_flags & O_TRUNC) == O_TRUNC) ) {
410                 const char *wild;
411
412                 /*
413                  * We can't actually truncate here as the file may be locked.
414                  * open_file_ntcreate will take care of the truncate later. JRA.
415                  */
416
417                 local_flags &= ~O_TRUNC;
418
419 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
420                 /*
421                  * We would block on opening a FIFO with no one else on the
422                  * other end. Do what we used to do and add O_NONBLOCK to the
423                  * open flags. JRA.
424                  */
425
426                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
427                         local_flags |= O_NONBLOCK;
428                 }
429 #endif
430
431                 /* Don't create files with Microsoft wildcard characters. */
432                 if (fsp->base_fsp) {
433                         /*
434                          * wildcard characters are allowed in stream names
435                          * only test the basefilename
436                          */
437                         wild = fsp->base_fsp->fsp_name->base_name;
438                 } else {
439                         wild = smb_fname->base_name;
440                 }
441                 if ((local_flags & O_CREAT) && !file_existed &&
442                     ms_has_wild(wild))  {
443                         return NT_STATUS_OBJECT_NAME_INVALID;
444                 }
445
446                 /* Actually do the open */
447                 status = fd_open(conn, smb_fname, fsp, local_flags, unx_mode);
448                 if (!NT_STATUS_IS_OK(status)) {
449                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
450                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
451                                  nt_errstr(status),local_flags,flags));
452                         return status;
453                 }
454
455                 if ((local_flags & O_CREAT) && !file_existed) {
456
457                         /* Inherit the ACL if required */
458                         if (lp_inherit_perms(SNUM(conn))) {
459                                 inherit_access_posix_acl(conn, parent_dir,
460                                                          smb_fname->base_name,
461                                                          unx_mode);
462                         }
463
464                         /* Change the owner if required. */
465                         if (lp_inherit_owner(SNUM(conn))) {
466                                 change_file_owner_to_parent(conn, parent_dir,
467                                                             fsp);
468                         }
469
470                         notify_fname(conn, NOTIFY_ACTION_ADDED,
471                                      FILE_NOTIFY_CHANGE_FILE_NAME,
472                                      smb_fname->base_name);
473                 }
474
475         } else {
476                 fsp->fh->fd = -1; /* What we used to call a stat open. */
477                 if (file_existed) {
478                         uint32_t access_granted = 0;
479
480                         status = smbd_check_open_rights(conn,
481                                         smb_fname,
482                                         access_mask,
483                                         &access_granted);
484                         if (!NT_STATUS_IS_OK(status)) {
485                                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
486                                         /*
487                                          * On NT_STATUS_ACCESS_DENIED, access_granted
488                                          * contains the denied bits.
489                                          */
490
491                                         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
492                                                         (access_granted & FILE_WRITE_ATTRIBUTES) &&
493                                                         (lp_map_readonly(SNUM(conn)) ||
494                                                          lp_map_archive(SNUM(conn)) ||
495                                                          lp_map_hidden(SNUM(conn)) ||
496                                                          lp_map_system(SNUM(conn)))) {
497                                                 access_granted &= ~FILE_WRITE_ATTRIBUTES;
498
499                                                 DEBUG(10,("open_file: "
500                                                           "overrode "
501                                                           "FILE_WRITE_"
502                                                           "ATTRIBUTES "
503                                                           "on file %s\n",
504                                                           smb_fname_str_dbg(
505                                                                   smb_fname)));
506                                         }
507
508                                         if ((access_mask & DELETE_ACCESS) &&
509                                             (access_granted & DELETE_ACCESS) &&
510                                             can_delete_file_in_directory(conn,
511                                                 smb_fname)) {
512                                                 /* Were we trying to do a stat open
513                                                  * for delete and didn't get DELETE
514                                                  * access (only) ? Check if the
515                                                  * directory allows DELETE_CHILD.
516                                                  * See here:
517                                                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
518                                                  * for details. */
519
520                                                 access_granted &= ~DELETE_ACCESS;
521
522                                                 DEBUG(10,("open_file: "
523                                                           "overrode "
524                                                           "DELETE_ACCESS on "
525                                                           "file %s\n",
526                                                           smb_fname_str_dbg(
527                                                                   smb_fname)));
528                                         }
529
530                                         if (access_granted != 0) {
531                                                 DEBUG(10,("open_file: Access "
532                                                           "denied on file "
533                                                           "%s\n",
534                                                           smb_fname_str_dbg(
535                                                                   smb_fname)));
536                                                 return status;
537                                         }
538                                 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
539                                     fsp->posix_open &&
540                                     S_ISLNK(smb_fname->st.st_ex_mode)) {
541                                         /* This is a POSIX stat open for delete
542                                          * or rename on a symlink that points
543                                          * nowhere. Allow. */
544                                         DEBUG(10,("open_file: allowing POSIX "
545                                                   "open on bad symlink %s\n",
546                                                   smb_fname_str_dbg(
547                                                           smb_fname)));
548                                 } else {
549                                         DEBUG(10,("open_file: "
550                                                   "smbd_check_open_rights on file "
551                                                   "%s returned %s\n",
552                                                   smb_fname_str_dbg(smb_fname),
553                                                   nt_errstr(status) ));
554                                         return status;
555                                 }
556                         }
557                 }
558         }
559
560         if (!file_existed) {
561                 int ret;
562
563                 if (fsp->fh->fd == -1) {
564                         ret = SMB_VFS_STAT(conn, smb_fname);
565                 } else {
566                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
567                         /* If we have an fd, this stat should succeed. */
568                         if (ret == -1) {
569                                 DEBUG(0,("Error doing fstat on open file %s "
570                                          "(%s)\n",
571                                          smb_fname_str_dbg(smb_fname),
572                                          strerror(errno) ));
573                         }
574                 }
575
576                 /* For a non-io open, this stat failing means file not found. JRA */
577                 if (ret == -1) {
578                         status = map_nt_error_from_unix(errno);
579                         fd_close(fsp);
580                         return status;
581                 }
582         }
583
584         /*
585          * POSIX allows read-only opens of directories. We don't
586          * want to do this (we use a different code path for this)
587          * so catch a directory open and return an EISDIR. JRA.
588          */
589
590         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
591                 fd_close(fsp);
592                 errno = EISDIR;
593                 return NT_STATUS_FILE_IS_A_DIRECTORY;
594         }
595
596         fsp->mode = smb_fname->st.st_ex_mode;
597         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
598         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
599         fsp->file_pid = req ? req->smbpid : 0;
600         fsp->can_lock = True;
601         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
602         if (!CAN_WRITE(conn)) {
603                 fsp->can_write = False;
604         } else {
605                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
606                         True : False;
607         }
608         fsp->print_file = False;
609         fsp->modified = False;
610         fsp->sent_oplock_break = NO_BREAK_SENT;
611         fsp->is_directory = False;
612         if (conn->aio_write_behind_list &&
613             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
614                        conn->case_sensitive)) {
615                 fsp->aio_write_behind = True;
616         }
617         status = fsp_set_smb_fname(fsp, smb_fname);
618         if (!NT_STATUS_IS_OK(status)) {
619                 fd_close(fsp);
620                 errno = map_errno_from_nt_status(status);
621                 return status;
622         }
623
624         fsp->wcp = NULL; /* Write cache pointer. */
625
626         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
627                  conn->server_info->unix_name,
628                  smb_fname_str_dbg(smb_fname),
629                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
630                  conn->num_files_open));
631
632         errno = 0;
633         return NT_STATUS_OK;
634 }
635
636 /*******************************************************************
637  Return True if the filename is one of the special executable types.
638 ********************************************************************/
639
640 bool is_executable(const char *fname)
641 {
642         if ((fname = strrchr_m(fname,'.'))) {
643                 if (strequal(fname,".com") ||
644                     strequal(fname,".dll") ||
645                     strequal(fname,".exe") ||
646                     strequal(fname,".sym")) {
647                         return True;
648                 }
649         }
650         return False;
651 }
652
653 /****************************************************************************
654  Check if we can open a file with a share mode.
655  Returns True if conflict, False if not.
656 ****************************************************************************/
657
658 static bool share_conflict(struct share_mode_entry *entry,
659                            uint32 access_mask,
660                            uint32 share_access)
661 {
662         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
663                   "entry->share_access = 0x%x, "
664                   "entry->private_options = 0x%x\n",
665                   (unsigned int)entry->access_mask,
666                   (unsigned int)entry->share_access,
667                   (unsigned int)entry->private_options));
668
669         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
670                   (unsigned int)access_mask, (unsigned int)share_access));
671
672         if ((entry->access_mask & (FILE_WRITE_DATA|
673                                    FILE_APPEND_DATA|
674                                    FILE_READ_DATA|
675                                    FILE_EXECUTE|
676                                    DELETE_ACCESS)) == 0) {
677                 DEBUG(10,("share_conflict: No conflict due to "
678                           "entry->access_mask = 0x%x\n",
679                           (unsigned int)entry->access_mask ));
680                 return False;
681         }
682
683         if ((access_mask & (FILE_WRITE_DATA|
684                             FILE_APPEND_DATA|
685                             FILE_READ_DATA|
686                             FILE_EXECUTE|
687                             DELETE_ACCESS)) == 0) {
688                 DEBUG(10,("share_conflict: No conflict due to "
689                           "access_mask = 0x%x\n",
690                           (unsigned int)access_mask ));
691                 return False;
692         }
693
694 #if 1 /* JRA TEST - Superdebug. */
695 #define CHECK_MASK(num, am, right, sa, share) \
696         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
697                 (unsigned int)(num), (unsigned int)(am), \
698                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
699         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
700                 (unsigned int)(num), (unsigned int)(sa), \
701                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
702         if (((am) & (right)) && !((sa) & (share))) { \
703                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
704 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
705                         (unsigned int)(share) )); \
706                 return True; \
707         }
708 #else
709 #define CHECK_MASK(num, am, right, sa, share) \
710         if (((am) & (right)) && !((sa) & (share))) { \
711                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
712 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
713                         (unsigned int)(share) )); \
714                 return True; \
715         }
716 #endif
717
718         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
719                    share_access, FILE_SHARE_WRITE);
720         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
721                    entry->share_access, FILE_SHARE_WRITE);
722         
723         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
724                    share_access, FILE_SHARE_READ);
725         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
726                    entry->share_access, FILE_SHARE_READ);
727
728         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
729                    share_access, FILE_SHARE_DELETE);
730         CHECK_MASK(6, access_mask, DELETE_ACCESS,
731                    entry->share_access, FILE_SHARE_DELETE);
732
733         DEBUG(10,("share_conflict: No conflict.\n"));
734         return False;
735 }
736
737 #if defined(DEVELOPER)
738 static void validate_my_share_entries(int num,
739                                       struct share_mode_entry *share_entry)
740 {
741         files_struct *fsp;
742
743         if (!procid_is_me(&share_entry->pid)) {
744                 return;
745         }
746
747         if (is_deferred_open_entry(share_entry) &&
748             !open_was_deferred(share_entry->op_mid)) {
749                 char *str = talloc_asprintf(talloc_tos(),
750                         "Got a deferred entry without a request: "
751                         "PANIC: %s\n",
752                         share_mode_str(talloc_tos(), num, share_entry));
753                 smb_panic(str);
754         }
755
756         if (!is_valid_share_mode_entry(share_entry)) {
757                 return;
758         }
759
760         fsp = file_find_dif(share_entry->id,
761                             share_entry->share_file_id);
762         if (!fsp) {
763                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
764                          share_mode_str(talloc_tos(), num, share_entry) ));
765                 smb_panic("validate_my_share_entries: Cannot match a "
766                           "share entry with an open file\n");
767         }
768
769         if (is_deferred_open_entry(share_entry) ||
770             is_unused_share_mode_entry(share_entry)) {
771                 goto panic;
772         }
773
774         if ((share_entry->op_type == NO_OPLOCK) &&
775             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
776                 /* Someone has already written to it, but I haven't yet
777                  * noticed */
778                 return;
779         }
780
781         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
782                 goto panic;
783         }
784
785         return;
786
787  panic:
788         {
789                 char *str;
790                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
791                          share_mode_str(talloc_tos(), num, share_entry) ));
792                 str = talloc_asprintf(talloc_tos(),
793                         "validate_my_share_entries: "
794                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
795                          fsp->fsp_name->base_name,
796                          (unsigned int)fsp->oplock_type,
797                          (unsigned int)share_entry->op_type );
798                 smb_panic(str);
799         }
800 }
801 #endif
802
803 bool is_stat_open(uint32 access_mask)
804 {
805         return (access_mask &&
806                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
807                                   FILE_WRITE_ATTRIBUTES))==0) &&
808                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
809                                  FILE_WRITE_ATTRIBUTES)) != 0));
810 }
811
812 /****************************************************************************
813  Deal with share modes
814  Invarient: Share mode must be locked on entry and exit.
815  Returns -1 on error, or number of share modes on success (may be zero).
816 ****************************************************************************/
817
818 static NTSTATUS open_mode_check(connection_struct *conn,
819                                 struct share_mode_lock *lck,
820                                 uint32 access_mask,
821                                 uint32 share_access,
822                                 uint32 create_options,
823                                 bool *file_existed)
824 {
825         int i;
826
827         if(lck->num_share_modes == 0) {
828                 return NT_STATUS_OK;
829         }
830
831         *file_existed = True;
832
833         /* A delete on close prohibits everything */
834
835         if (lck->delete_on_close) {
836                 return NT_STATUS_DELETE_PENDING;
837         }
838
839         if (is_stat_open(access_mask)) {
840                 /* Stat open that doesn't trigger oplock breaks or share mode
841                  * checks... ! JRA. */
842                 return NT_STATUS_OK;
843         }
844
845         /*
846          * Check if the share modes will give us access.
847          */
848         
849 #if defined(DEVELOPER)
850         for(i = 0; i < lck->num_share_modes; i++) {
851                 validate_my_share_entries(i, &lck->share_modes[i]);
852         }
853 #endif
854
855         if (!lp_share_modes(SNUM(conn))) {
856                 return NT_STATUS_OK;
857         }
858
859         /* Now we check the share modes, after any oplock breaks. */
860         for(i = 0; i < lck->num_share_modes; i++) {
861
862                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
863                         continue;
864                 }
865
866                 /* someone else has a share lock on it, check to see if we can
867                  * too */
868                 if (share_conflict(&lck->share_modes[i],
869                                    access_mask, share_access)) {
870                         return NT_STATUS_SHARING_VIOLATION;
871                 }
872         }
873         
874         return NT_STATUS_OK;
875 }
876
877 static bool is_delete_request(files_struct *fsp) {
878         return ((fsp->access_mask == DELETE_ACCESS) &&
879                 (fsp->oplock_type == NO_OPLOCK));
880 }
881
882 /*
883  * Send a break message to the oplock holder and delay the open for
884  * our client.
885  */
886
887 static NTSTATUS send_break_message(files_struct *fsp,
888                                         struct share_mode_entry *exclusive,
889                                         uint16 mid,
890                                         int oplock_request)
891 {
892         NTSTATUS status;
893         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
894
895         DEBUG(10, ("Sending break request to PID %s\n",
896                    procid_str_static(&exclusive->pid)));
897         exclusive->op_mid = mid;
898
899         /* Create the message. */
900         share_mode_entry_to_message(msg, exclusive);
901
902         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
903            don't want this set in the share mode struct pointed to by lck. */
904
905         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
906                 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
907         }
908
909         status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
910                                     MSG_SMB_BREAK_REQUEST,
911                                     (uint8 *)msg,
912                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
913         if (!NT_STATUS_IS_OK(status)) {
914                 DEBUG(3, ("Could not send oplock break message: %s\n",
915                           nt_errstr(status)));
916         }
917
918         return status;
919 }
920
921 /*
922  * 1) No files open at all or internal open: Grant whatever the client wants.
923  *
924  * 2) Exclusive (or batch) oplock around: If the requested access is a delete
925  *    request, break if the oplock around is a batch oplock. If it's another
926  *    requested access type, break.
927  *
928  * 3) Only level2 around: Grant level2 and do nothing else.
929  */
930
931 static bool delay_for_oplocks(struct share_mode_lock *lck,
932                               files_struct *fsp,
933                               uint16 mid,
934                               int pass_number,
935                               int oplock_request)
936 {
937         int i;
938         struct share_mode_entry *exclusive = NULL;
939         bool valid_entry = false;
940         bool have_level2 = false;
941         bool have_a_none_oplock = false;
942         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
943                             lp_level2_oplocks(SNUM(fsp->conn));
944
945         if (oplock_request & INTERNAL_OPEN_ONLY) {
946                 fsp->oplock_type = NO_OPLOCK;
947         }
948
949         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
950                 return false;
951         }
952
953         for (i=0; i<lck->num_share_modes; i++) {
954
955                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
956                         continue;
957                 }
958
959                 /* At least one entry is not an invalid or deferred entry. */
960                 valid_entry = true;
961
962                 if (pass_number == 1) {
963                         if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
964                                 SMB_ASSERT(exclusive == NULL);
965                                 exclusive = &lck->share_modes[i];
966                         }
967                 } else {
968                         if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
969                                 SMB_ASSERT(exclusive == NULL);
970                                 exclusive = &lck->share_modes[i];
971                         }
972                 }
973
974                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
975                         SMB_ASSERT(exclusive == NULL);
976                         have_level2 = true;
977                 }
978
979                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
980                         have_a_none_oplock = true;
981                 }
982         }
983
984         if (exclusive != NULL) { /* Found an exclusive oplock */
985                 bool delay_it = is_delete_request(fsp) ?
986                                 BATCH_OPLOCK_TYPE(exclusive->op_type) : true;
987                 SMB_ASSERT(!have_level2);
988                 if (delay_it) {
989                         send_break_message(fsp, exclusive, mid, oplock_request);
990                         return true;
991                 }
992         }
993
994         /*
995          * Match what was requested (fsp->oplock_type) with
996          * what was found in the existing share modes.
997          */
998
999         if (!valid_entry) {
1000                 /* All entries are placeholders or deferred.
1001                  * Directly grant whatever the client wants. */
1002                 if (fsp->oplock_type == NO_OPLOCK) {
1003                         /* Store a level2 oplock, but don't tell the client */
1004                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1005                 }
1006         } else if (have_a_none_oplock) {
1007                 fsp->oplock_type = NO_OPLOCK;
1008         } else if (have_level2) {
1009                 if (fsp->oplock_type == NO_OPLOCK ||
1010                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1011                         /* Store a level2 oplock, but don't tell the client */
1012                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1013                 } else {
1014                         fsp->oplock_type = LEVEL_II_OPLOCK;
1015                 }
1016         } else {
1017                 /* This case can never happen. */
1018                 SMB_ASSERT(1);
1019         }
1020
1021         /*
1022          * Don't grant level2 to clients that don't want them
1023          * or if we've turned them off.
1024          */
1025         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1026                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1027         }
1028
1029         DEBUG(10,("delay_for_oplocks: oplock type 0x%x on file %s\n",
1030                   fsp->oplock_type, fsp_str_dbg(fsp)));
1031
1032         /* No delay. */
1033         return false;
1034 }
1035
1036 bool request_timed_out(struct timeval request_time,
1037                        struct timeval timeout)
1038 {
1039         struct timeval now, end_time;
1040         GetTimeOfDay(&now);
1041         end_time = timeval_sum(&request_time, &timeout);
1042         return (timeval_compare(&end_time, &now) < 0);
1043 }
1044
1045 /****************************************************************************
1046  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1047 ****************************************************************************/
1048
1049 static void defer_open(struct share_mode_lock *lck,
1050                        struct timeval request_time,
1051                        struct timeval timeout,
1052                        struct smb_request *req,
1053                        struct deferred_open_record *state)
1054 {
1055         int i;
1056
1057         /* Paranoia check */
1058
1059         for (i=0; i<lck->num_share_modes; i++) {
1060                 struct share_mode_entry *e = &lck->share_modes[i];
1061
1062                 if (!is_deferred_open_entry(e)) {
1063                         continue;
1064                 }
1065
1066                 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1067                         DEBUG(0, ("Trying to defer an already deferred "
1068                                   "request: mid=%d, exiting\n", req->mid));
1069                         exit_server("attempt to defer a deferred request");
1070                 }
1071         }
1072
1073         /* End paranoia check */
1074
1075         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1076                   "open entry for mid %u\n",
1077                   (unsigned int)request_time.tv_sec,
1078                   (unsigned int)request_time.tv_usec,
1079                   (unsigned int)req->mid));
1080
1081         if (!push_deferred_smb_message(req, request_time, timeout,
1082                                        (char *)state, sizeof(*state))) {
1083                 exit_server("push_deferred_smb_message failed");
1084         }
1085         add_deferred_open(lck, req->mid, request_time, state->id);
1086 }
1087
1088
1089 /****************************************************************************
1090  On overwrite open ensure that the attributes match.
1091 ****************************************************************************/
1092
1093 bool open_match_attributes(connection_struct *conn,
1094                            uint32 old_dos_attr,
1095                            uint32 new_dos_attr,
1096                            mode_t existing_unx_mode,
1097                            mode_t new_unx_mode,
1098                            mode_t *returned_unx_mode)
1099 {
1100         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1101
1102         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1103         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1104
1105         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) || 
1106            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1107                 *returned_unx_mode = new_unx_mode;
1108         } else {
1109                 *returned_unx_mode = (mode_t)0;
1110         }
1111
1112         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1113                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1114                   "returned_unx_mode = 0%o\n",
1115                   (unsigned int)old_dos_attr,
1116                   (unsigned int)existing_unx_mode,
1117                   (unsigned int)new_dos_attr,
1118                   (unsigned int)*returned_unx_mode ));
1119
1120         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1121         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1122                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1123                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1124                         return False;
1125                 }
1126         }
1127         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1128                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1129                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1130                         return False;
1131                 }
1132         }
1133         return True;
1134 }
1135
1136 /****************************************************************************
1137  Special FCB or DOS processing in the case of a sharing violation.
1138  Try and find a duplicated file handle.
1139 ****************************************************************************/
1140
1141 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1142                                      connection_struct *conn,
1143                                      files_struct *fsp_to_dup_into,
1144                                      const struct smb_filename *smb_fname,
1145                                      struct file_id id,
1146                                      uint16 file_pid,
1147                                      uint16 vuid,
1148                                      uint32 access_mask,
1149                                      uint32 share_access,
1150                                      uint32 create_options)
1151 {
1152         files_struct *fsp;
1153
1154         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1155                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1156
1157         for(fsp = file_find_di_first(id); fsp;
1158             fsp = file_find_di_next(fsp)) {
1159
1160                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1161                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1162                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1163                           fsp->fh->fd, (unsigned int)fsp->vuid,
1164                           (unsigned int)fsp->file_pid,
1165                           (unsigned int)fsp->fh->private_options,
1166                           (unsigned int)fsp->access_mask ));
1167
1168                 if (fsp->fh->fd != -1 &&
1169                     fsp->vuid == vuid &&
1170                     fsp->file_pid == file_pid &&
1171                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1172                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1173                     (fsp->access_mask & FILE_WRITE_DATA) &&
1174                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1175                     strequal(fsp->fsp_name->stream_name,
1176                              smb_fname->stream_name)) {
1177                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1178                         break;
1179                 }
1180         }
1181
1182         if (!fsp) {
1183                 return NT_STATUS_NOT_FOUND;
1184         }
1185
1186         /* quite an insane set of semantics ... */
1187         if (is_executable(smb_fname->base_name) &&
1188             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1189                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1190                 return NT_STATUS_INVALID_PARAMETER;
1191         }
1192
1193         /* We need to duplicate this fsp. */
1194         return dup_file_fsp(req, fsp, access_mask, share_access,
1195                             create_options, fsp_to_dup_into);
1196 }
1197
1198 /****************************************************************************
1199  Open a file with a share mode - old openX method - map into NTCreate.
1200 ****************************************************************************/
1201
1202 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1203                                  int deny_mode, int open_func,
1204                                  uint32 *paccess_mask,
1205                                  uint32 *pshare_mode,
1206                                  uint32 *pcreate_disposition,
1207                                  uint32 *pcreate_options)
1208 {
1209         uint32 access_mask;
1210         uint32 share_mode;
1211         uint32 create_disposition;
1212         uint32 create_options = FILE_NON_DIRECTORY_FILE;
1213
1214         DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1215                   "open_func = 0x%x\n",
1216                   smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1217                   (unsigned int)open_func ));
1218
1219         /* Create the NT compatible access_mask. */
1220         switch (GET_OPENX_MODE(deny_mode)) {
1221                 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1222                 case DOS_OPEN_RDONLY:
1223                         access_mask = FILE_GENERIC_READ;
1224                         break;
1225                 case DOS_OPEN_WRONLY:
1226                         access_mask = FILE_GENERIC_WRITE;
1227                         break;
1228                 case DOS_OPEN_RDWR:
1229                 case DOS_OPEN_FCB:
1230                         access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1231                         break;
1232                 default:
1233                         DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1234                                   (unsigned int)GET_OPENX_MODE(deny_mode)));
1235                         return False;
1236         }
1237
1238         /* Create the NT compatible create_disposition. */
1239         switch (open_func) {
1240                 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1241                         create_disposition = FILE_CREATE;
1242                         break;
1243
1244                 case OPENX_FILE_EXISTS_OPEN:
1245                         create_disposition = FILE_OPEN;
1246                         break;
1247
1248                 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1249                         create_disposition = FILE_OPEN_IF;
1250                         break;
1251        
1252                 case OPENX_FILE_EXISTS_TRUNCATE:
1253                         create_disposition = FILE_OVERWRITE;
1254                         break;
1255
1256                 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1257                         create_disposition = FILE_OVERWRITE_IF;
1258                         break;
1259
1260                 default:
1261                         /* From samba4 - to be confirmed. */
1262                         if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1263                                 create_disposition = FILE_CREATE;
1264                                 break;
1265                         }
1266                         DEBUG(10,("map_open_params_to_ntcreate: bad "
1267                                   "open_func 0x%x\n", (unsigned int)open_func));
1268                         return False;
1269         }
1270  
1271         /* Create the NT compatible share modes. */
1272         switch (GET_DENY_MODE(deny_mode)) {
1273                 case DENY_ALL:
1274                         share_mode = FILE_SHARE_NONE;
1275                         break;
1276
1277                 case DENY_WRITE:
1278                         share_mode = FILE_SHARE_READ;
1279                         break;
1280
1281                 case DENY_READ:
1282                         share_mode = FILE_SHARE_WRITE;
1283                         break;
1284
1285                 case DENY_NONE:
1286                         share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1287                         break;
1288
1289                 case DENY_DOS:
1290                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1291                         if (is_executable(smb_fname->base_name)) {
1292                                 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1293                         } else {
1294                                 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1295                                         share_mode = FILE_SHARE_READ;
1296                                 } else {
1297                                         share_mode = FILE_SHARE_NONE;
1298                                 }
1299                         }
1300                         break;
1301
1302                 case DENY_FCB:
1303                         create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1304                         share_mode = FILE_SHARE_NONE;
1305                         break;
1306
1307                 default:
1308                         DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1309                                 (unsigned int)GET_DENY_MODE(deny_mode) ));
1310                         return False;
1311         }
1312
1313         DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1314                   "share_mode = 0x%x, create_disposition = 0x%x, "
1315                   "create_options = 0x%x\n",
1316                   smb_fname_str_dbg(smb_fname),
1317                   (unsigned int)access_mask,
1318                   (unsigned int)share_mode,
1319                   (unsigned int)create_disposition,
1320                   (unsigned int)create_options ));
1321
1322         if (paccess_mask) {
1323                 *paccess_mask = access_mask;
1324         }
1325         if (pshare_mode) {
1326                 *pshare_mode = share_mode;
1327         }
1328         if (pcreate_disposition) {
1329                 *pcreate_disposition = create_disposition;
1330         }
1331         if (pcreate_options) {
1332                 *pcreate_options = create_options;
1333         }
1334
1335         return True;
1336
1337 }
1338
1339 static void schedule_defer_open(struct share_mode_lock *lck,
1340                                 struct timeval request_time,
1341                                 struct smb_request *req)
1342 {
1343         struct deferred_open_record state;
1344
1345         /* This is a relative time, added to the absolute
1346            request_time value to get the absolute timeout time.
1347            Note that if this is the second or greater time we enter
1348            this codepath for this particular request mid then
1349            request_time is left as the absolute time of the *first*
1350            time this request mid was processed. This is what allows
1351            the request to eventually time out. */
1352
1353         struct timeval timeout;
1354
1355         /* Normally the smbd we asked should respond within
1356          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1357          * the client did, give twice the timeout as a safety
1358          * measure here in case the other smbd is stuck
1359          * somewhere else. */
1360
1361         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1362
1363         /* Nothing actually uses state.delayed_for_oplocks
1364            but it's handy to differentiate in debug messages
1365            between a 30 second delay due to oplock break, and
1366            a 1 second delay for share mode conflicts. */
1367
1368         state.delayed_for_oplocks = True;
1369         state.id = lck->id;
1370
1371         if (!request_timed_out(request_time, timeout)) {
1372                 defer_open(lck, request_time, timeout, req, &state);
1373         }
1374 }
1375
1376 /****************************************************************************
1377  Work out what access_mask to use from what the client sent us.
1378 ****************************************************************************/
1379
1380 static NTSTATUS calculate_access_mask(connection_struct *conn,
1381                                         const struct smb_filename *smb_fname,
1382                                         bool file_existed,
1383                                         uint32_t access_mask,
1384                                         uint32_t *access_mask_out)
1385 {
1386         NTSTATUS status;
1387
1388         /*
1389          * Convert GENERIC bits to specific bits.
1390          */
1391
1392         se_map_generic(&access_mask, &file_generic_mapping);
1393
1394         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1395         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1396                 if (file_existed) {
1397
1398                         struct security_descriptor *sd;
1399                         uint32_t access_granted = 0;
1400
1401                         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1402                                         (OWNER_SECURITY_INFORMATION |
1403                                         GROUP_SECURITY_INFORMATION |
1404                                         DACL_SECURITY_INFORMATION),&sd);
1405
1406                         if (!NT_STATUS_IS_OK(status)) {
1407                                 DEBUG(10, ("calculate_access_mask: Could not get acl "
1408                                         "on file %s: %s\n",
1409                                         smb_fname_str_dbg(smb_fname),
1410                                         nt_errstr(status)));
1411                                 return NT_STATUS_ACCESS_DENIED;
1412                         }
1413
1414                         status = smb1_file_se_access_check(sd,
1415                                         conn->server_info->ptok,
1416                                         access_mask,
1417                                         &access_granted);
1418
1419                         TALLOC_FREE(sd);
1420
1421                         if (!NT_STATUS_IS_OK(status)) {
1422                                 DEBUG(10, ("calculate_access_mask: Access denied on "
1423                                         "file %s: when calculating maximum access\n",
1424                                         smb_fname_str_dbg(smb_fname)));
1425                                 return NT_STATUS_ACCESS_DENIED;
1426                         }
1427
1428                         access_mask = access_granted;
1429                 } else {
1430                         access_mask = FILE_GENERIC_ALL;
1431                 }
1432         }
1433
1434         *access_mask_out = access_mask;
1435         return NT_STATUS_OK;
1436 }
1437
1438 /****************************************************************************
1439  Open a file with a share mode. Passed in an already created files_struct *.
1440 ****************************************************************************/
1441
1442 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1443                             struct smb_request *req,
1444                             struct smb_filename *smb_fname,
1445                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1446                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1447                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1448                             uint32 create_options,      /* options such as delete on close. */
1449                             uint32 new_dos_attributes,  /* attributes used for new file. */
1450                             int oplock_request,         /* internal Samba oplock codes. */
1451                                                         /* Information (FILE_EXISTS etc.) */
1452                             int *pinfo,
1453                             files_struct *fsp)
1454 {
1455         int flags=0;
1456         int flags2=0;
1457         bool file_existed = VALID_STAT(smb_fname->st);
1458         bool def_acl = False;
1459         bool posix_open = False;
1460         bool new_file_created = False;
1461         bool clear_ads = false;
1462         struct file_id id;
1463         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1464         mode_t new_unx_mode = (mode_t)0;
1465         mode_t unx_mode = (mode_t)0;
1466         int info;
1467         uint32 existing_dos_attributes = 0;
1468         struct pending_message_list *pml = NULL;
1469         struct timeval request_time = timeval_zero();
1470         struct share_mode_lock *lck = NULL;
1471         uint32 open_access_mask = access_mask;
1472         NTSTATUS status;
1473         int ret_flock;
1474         char *parent_dir;
1475
1476         ZERO_STRUCT(id);
1477
1478         if (conn->printer) {
1479                 /*
1480                  * Printers are handled completely differently.
1481                  * Most of the passed parameters are ignored.
1482                  */
1483
1484                 if (pinfo) {
1485                         *pinfo = FILE_WAS_CREATED;
1486                 }
1487
1488                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1489                            smb_fname_str_dbg(smb_fname)));
1490
1491                 if (!req) {
1492                         DEBUG(0,("open_file_ntcreate: printer open without "
1493                                 "an SMB request!\n"));
1494                         return NT_STATUS_INTERNAL_ERROR;
1495                 }
1496
1497                 return print_fsp_open(req, conn, smb_fname->base_name,
1498                                       req->vuid, fsp, &smb_fname->st);
1499         }
1500
1501         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1502                             NULL)) {
1503                 return NT_STATUS_NO_MEMORY;
1504         }
1505
1506         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1507                 posix_open = True;
1508                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1509                 new_dos_attributes = 0;
1510         } else {
1511                 /* We add aARCH to this as this mode is only used if the file is
1512                  * created new. */
1513                 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1514                                      smb_fname, parent_dir);
1515         }
1516
1517         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1518                    "access_mask=0x%x share_access=0x%x "
1519                    "create_disposition = 0x%x create_options=0x%x "
1520                    "unix mode=0%o oplock_request=%d\n",
1521                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1522                    access_mask, share_access, create_disposition,
1523                    create_options, (unsigned int)unx_mode, oplock_request));
1524
1525         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1526                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1527                 return NT_STATUS_INTERNAL_ERROR;
1528         }
1529
1530         /*
1531          * Only non-internal opens can be deferred at all
1532          */
1533
1534         if ((req != NULL)
1535             && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1536                 struct deferred_open_record *state =
1537                         (struct deferred_open_record *)pml->private_data.data;
1538
1539                 /* Remember the absolute time of the original
1540                    request with this mid. We'll use it later to
1541                    see if this has timed out. */
1542
1543                 request_time = pml->request_time;
1544
1545                 /* Remove the deferred open entry under lock. */
1546                 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1547                                           NULL);
1548                 if (lck == NULL) {
1549                         DEBUG(0, ("could not get share mode lock\n"));
1550                 } else {
1551                         del_deferred_open_entry(lck, req->mid);
1552                         TALLOC_FREE(lck);
1553                 }
1554
1555                 /* Ensure we don't reprocess this message. */
1556                 remove_deferred_open_smb_message(req->mid);
1557         }
1558
1559         status = check_name(conn, smb_fname->base_name);
1560         if (!NT_STATUS_IS_OK(status)) {
1561                 return status;
1562         }
1563
1564         if (!posix_open) {
1565                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1566                 if (file_existed) {
1567                         existing_dos_attributes = dos_mode(conn, smb_fname);
1568                 }
1569         }
1570
1571         /* ignore any oplock requests if oplocks are disabled */
1572         if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1573             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1574                 /* Mask off everything except the private Samba bits. */
1575                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1576         }
1577
1578         /* this is for OS/2 long file names - say we don't support them */
1579         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1580                 /* OS/2 Workplace shell fix may be main code stream in a later
1581                  * release. */
1582                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1583                          "supported.\n"));
1584                 if (use_nt_status()) {
1585                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1586                 }
1587                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1588         }
1589
1590         switch( create_disposition ) {
1591                 /*
1592                  * Currently we're using FILE_SUPERSEDE as the same as
1593                  * FILE_OVERWRITE_IF but they really are
1594                  * different. FILE_SUPERSEDE deletes an existing file
1595                  * (requiring delete access) then recreates it.
1596                  */
1597                 case FILE_SUPERSEDE:
1598                         /* If file exists replace/overwrite. If file doesn't
1599                          * exist create. */
1600                         flags2 |= (O_CREAT | O_TRUNC);
1601                         clear_ads = true;
1602                         break;
1603
1604                 case FILE_OVERWRITE_IF:
1605                         /* If file exists replace/overwrite. If file doesn't
1606                          * exist create. */
1607                         flags2 |= (O_CREAT | O_TRUNC);
1608                         clear_ads = true;
1609                         break;
1610
1611                 case FILE_OPEN:
1612                         /* If file exists open. If file doesn't exist error. */
1613                         if (!file_existed) {
1614                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1615                                          "requested for file %s and file "
1616                                          "doesn't exist.\n",
1617                                          smb_fname_str_dbg(smb_fname)));
1618                                 errno = ENOENT;
1619                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1620                         }
1621                         break;
1622
1623                 case FILE_OVERWRITE:
1624                         /* If file exists overwrite. If file doesn't exist
1625                          * error. */
1626                         if (!file_existed) {
1627                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1628                                          "requested for file %s and file "
1629                                          "doesn't exist.\n",
1630                                          smb_fname_str_dbg(smb_fname) ));
1631                                 errno = ENOENT;
1632                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1633                         }
1634                         flags2 |= O_TRUNC;
1635                         clear_ads = true;
1636                         break;
1637
1638                 case FILE_CREATE:
1639                         /* If file exists error. If file doesn't exist
1640                          * create. */
1641                         if (file_existed) {
1642                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1643                                          "requested for file %s and file "
1644                                          "already exists.\n",
1645                                          smb_fname_str_dbg(smb_fname)));
1646                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1647                                         errno = EISDIR;
1648                                 } else {
1649                                         errno = EEXIST;
1650                                 }
1651                                 return map_nt_error_from_unix(errno);
1652                         }
1653                         flags2 |= (O_CREAT|O_EXCL);
1654                         break;
1655
1656                 case FILE_OPEN_IF:
1657                         /* If file exists open. If file doesn't exist
1658                          * create. */
1659                         flags2 |= O_CREAT;
1660                         break;
1661
1662                 default:
1663                         return NT_STATUS_INVALID_PARAMETER;
1664         }
1665
1666         /* We only care about matching attributes on file exists and
1667          * overwrite. */
1668
1669         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1670                              (create_disposition == FILE_OVERWRITE_IF))) {
1671                 if (!open_match_attributes(conn, existing_dos_attributes,
1672                                            new_dos_attributes,
1673                                            smb_fname->st.st_ex_mode,
1674                                            unx_mode, &new_unx_mode)) {
1675                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1676                                  "for file %s (%x %x) (0%o, 0%o)\n",
1677                                  smb_fname_str_dbg(smb_fname),
1678                                  existing_dos_attributes,
1679                                  new_dos_attributes,
1680                                  (unsigned int)smb_fname->st.st_ex_mode,
1681                                  (unsigned int)unx_mode ));
1682                         errno = EACCES;
1683                         return NT_STATUS_ACCESS_DENIED;
1684                 }
1685         }
1686
1687         status = calculate_access_mask(conn, smb_fname, file_existed,
1688                                         access_mask,
1689                                         &access_mask); 
1690         if (!NT_STATUS_IS_OK(status)) {
1691                 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1692                         "on file %s returned %s\n",
1693                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1694                 return status;
1695         }
1696
1697         open_access_mask = access_mask;
1698
1699         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1700                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1701         }
1702
1703         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1704                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1705                     access_mask));
1706
1707         /*
1708          * Note that we ignore the append flag as append does not
1709          * mean the same thing under DOS and Unix.
1710          */
1711
1712         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1713                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1714                 /* DENY_DOS opens are always underlying read-write on the
1715                    file handle, no matter what the requested access mask
1716                     says. */
1717                 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1718                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1719                         flags = O_RDWR;
1720                 } else {
1721                         flags = O_WRONLY;
1722                 }
1723         } else {
1724                 flags = O_RDONLY;
1725         }
1726
1727         /*
1728          * Currently we only look at FILE_WRITE_THROUGH for create options.
1729          */
1730
1731 #if defined(O_SYNC)
1732         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1733                 flags2 |= O_SYNC;
1734         }
1735 #endif /* O_SYNC */
1736
1737         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1738                 flags2 |= O_APPEND;
1739         }
1740
1741         if (!posix_open && !CAN_WRITE(conn)) {
1742                 /*
1743                  * We should really return a permission denied error if either
1744                  * O_CREAT or O_TRUNC are set, but for compatibility with
1745                  * older versions of Samba we just AND them out.
1746                  */
1747                 flags2 &= ~(O_CREAT|O_TRUNC);
1748         }
1749
1750         /*
1751          * Ensure we can't write on a read-only share or file.
1752          */
1753
1754         if (flags != O_RDONLY && file_existed &&
1755             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1756                 DEBUG(5,("open_file_ntcreate: write access requested for "
1757                          "file %s on read only %s\n",
1758                          smb_fname_str_dbg(smb_fname),
1759                          !CAN_WRITE(conn) ? "share" : "file" ));
1760                 errno = EACCES;
1761                 return NT_STATUS_ACCESS_DENIED;
1762         }
1763
1764         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1765         fsp->share_access = share_access;
1766         fsp->fh->private_options = create_options;
1767         fsp->access_mask = open_access_mask; /* We change this to the
1768                                               * requested access_mask after
1769                                               * the open is done. */
1770         fsp->posix_open = posix_open;
1771
1772         /* Ensure no SAMBA_PRIVATE bits can be set. */
1773         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1774
1775         if (timeval_is_zero(&request_time)) {
1776                 request_time = fsp->open_time;
1777         }
1778
1779         if (file_existed) {
1780                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1781                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1782
1783                 lck = get_share_mode_lock(talloc_tos(), id,
1784                                           conn->connectpath,
1785                                           smb_fname, &old_write_time);
1786
1787                 if (lck == NULL) {
1788                         DEBUG(0, ("Could not get share mode lock\n"));
1789                         return NT_STATUS_SHARING_VIOLATION;
1790                 }
1791
1792                 /* First pass - send break only on batch oplocks. */
1793                 if ((req != NULL)
1794                     && delay_for_oplocks(lck, fsp, req->mid, 1,
1795                                          oplock_request)) {
1796                         schedule_defer_open(lck, request_time, req);
1797                         TALLOC_FREE(lck);
1798                         return NT_STATUS_SHARING_VIOLATION;
1799                 }
1800
1801                 /* Use the client requested access mask here, not the one we
1802                  * open with. */
1803                 status = open_mode_check(conn, lck, access_mask, share_access,
1804                                          create_options, &file_existed);
1805
1806                 if (NT_STATUS_IS_OK(status)) {
1807                         /* We might be going to allow this open. Check oplock
1808                          * status again. */
1809                         /* Second pass - send break for both batch or
1810                          * exclusive oplocks. */
1811                         if ((req != NULL)
1812                              && delay_for_oplocks(lck, fsp, req->mid, 2,
1813                                                   oplock_request)) {
1814                                 schedule_defer_open(lck, request_time, req);
1815                                 TALLOC_FREE(lck);
1816                                 return NT_STATUS_SHARING_VIOLATION;
1817                         }
1818                 }
1819
1820                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1821                         /* DELETE_PENDING is not deferred for a second */
1822                         TALLOC_FREE(lck);
1823                         return status;
1824                 }
1825
1826                 if (!NT_STATUS_IS_OK(status)) {
1827                         uint32 can_access_mask;
1828                         bool can_access = True;
1829
1830                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1831
1832                         /* Check if this can be done with the deny_dos and fcb
1833                          * calls. */
1834                         if (create_options &
1835                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1836                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1837                                 if (req == NULL) {
1838                                         DEBUG(0, ("DOS open without an SMB "
1839                                                   "request!\n"));
1840                                         TALLOC_FREE(lck);
1841                                         return NT_STATUS_INTERNAL_ERROR;
1842                                 }
1843
1844                                 /* Use the client requested access mask here,
1845                                  * not the one we open with. */
1846                                 status = fcb_or_dos_open(req,
1847                                                         conn,
1848                                                         fsp,
1849                                                         smb_fname,
1850                                                         id,
1851                                                         req->smbpid,
1852                                                         req->vuid,
1853                                                         access_mask,
1854                                                         share_access,
1855                                                         create_options);
1856
1857                                 if (NT_STATUS_IS_OK(status)) {
1858                                         TALLOC_FREE(lck);
1859                                         if (pinfo) {
1860                                                 *pinfo = FILE_WAS_OPENED;
1861                                         }
1862                                         return NT_STATUS_OK;
1863                                 }
1864                         }
1865
1866                         /*
1867                          * This next line is a subtlety we need for
1868                          * MS-Access. If a file open will fail due to share
1869                          * permissions and also for security (access) reasons,
1870                          * we need to return the access failed error, not the
1871                          * share error. We can't open the file due to kernel
1872                          * oplock deadlock (it's possible we failed above on
1873                          * the open_mode_check()) so use a userspace check.
1874                          */
1875
1876                         if (flags & O_RDWR) {
1877                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1878                         } else if (flags & O_WRONLY) {
1879                                 can_access_mask = FILE_WRITE_DATA;
1880                         } else {
1881                                 can_access_mask = FILE_READ_DATA;
1882                         }
1883
1884                         if (((can_access_mask & FILE_WRITE_DATA) &&
1885                                 !CAN_WRITE(conn)) ||
1886                             !can_access_file_data(conn, smb_fname,
1887                                                   can_access_mask)) {
1888                                 can_access = False;
1889                         }
1890
1891                         /*
1892                          * If we're returning a share violation, ensure we
1893                          * cope with the braindead 1 second delay.
1894                          */
1895
1896                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1897                             lp_defer_sharing_violations()) {
1898                                 struct timeval timeout;
1899                                 struct deferred_open_record state;
1900                                 int timeout_usecs;
1901
1902                                 /* this is a hack to speed up torture tests
1903                                    in 'make test' */
1904                                 timeout_usecs = lp_parm_int(SNUM(conn),
1905                                                             "smbd","sharedelay",
1906                                                             SHARING_VIOLATION_USEC_WAIT);
1907
1908                                 /* This is a relative time, added to the absolute
1909                                    request_time value to get the absolute timeout time.
1910                                    Note that if this is the second or greater time we enter
1911                                    this codepath for this particular request mid then
1912                                    request_time is left as the absolute time of the *first*
1913                                    time this request mid was processed. This is what allows
1914                                    the request to eventually time out. */
1915
1916                                 timeout = timeval_set(0, timeout_usecs);
1917
1918                                 /* Nothing actually uses state.delayed_for_oplocks
1919                                    but it's handy to differentiate in debug messages
1920                                    between a 30 second delay due to oplock break, and
1921                                    a 1 second delay for share mode conflicts. */
1922
1923                                 state.delayed_for_oplocks = False;
1924                                 state.id = id;
1925
1926                                 if ((req != NULL)
1927                                     && !request_timed_out(request_time,
1928                                                           timeout)) {
1929                                         defer_open(lck, request_time, timeout,
1930                                                    req, &state);
1931                                 }
1932                         }
1933
1934                         TALLOC_FREE(lck);
1935                         if (can_access) {
1936                                 /*
1937                                  * We have detected a sharing violation here
1938                                  * so return the correct error code
1939                                  */
1940                                 status = NT_STATUS_SHARING_VIOLATION;
1941                         } else {
1942                                 status = NT_STATUS_ACCESS_DENIED;
1943                         }
1944                         return status;
1945                 }
1946
1947                 /*
1948                  * We exit this block with the share entry *locked*.....
1949                  */
1950         }
1951
1952         SMB_ASSERT(!file_existed || (lck != NULL));
1953
1954         /*
1955          * Ensure we pay attention to default ACLs on directories if required.
1956          */
1957
1958         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1959             (def_acl = directory_has_default_acl(conn, parent_dir))) {
1960                 unx_mode = 0777;
1961         }
1962
1963         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1964                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1965                  (unsigned int)flags, (unsigned int)flags2,
1966                  (unsigned int)unx_mode, (unsigned int)access_mask,
1967                  (unsigned int)open_access_mask));
1968
1969         /*
1970          * open_file strips any O_TRUNC flags itself.
1971          */
1972
1973         fsp_open = open_file(fsp, conn, req, parent_dir, smb_fname,
1974                              flags|flags2, unx_mode, access_mask,
1975                              open_access_mask);
1976
1977         if (!NT_STATUS_IS_OK(fsp_open)) {
1978                 if (lck != NULL) {
1979                         TALLOC_FREE(lck);
1980                 }
1981                 return fsp_open;
1982         }
1983
1984         if (!file_existed) {
1985                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1986                 /*
1987                  * Deal with the race condition where two smbd's detect the
1988                  * file doesn't exist and do the create at the same time. One
1989                  * of them will win and set a share mode, the other (ie. this
1990                  * one) should check if the requested share mode for this
1991                  * create is allowed.
1992                  */
1993
1994                 /*
1995                  * Now the file exists and fsp is successfully opened,
1996                  * fsp->dev and fsp->inode are valid and should replace the
1997                  * dev=0,inode=0 from a non existent file. Spotted by
1998                  * Nadav Danieli <nadavd@exanet.com>. JRA.
1999                  */
2000
2001                 id = fsp->file_id;
2002
2003                 lck = get_share_mode_lock(talloc_tos(), id,
2004                                           conn->connectpath,
2005                                           smb_fname, &old_write_time);
2006
2007                 if (lck == NULL) {
2008                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2009                                   "mode lock for %s\n",
2010                                   smb_fname_str_dbg(smb_fname)));
2011                         fd_close(fsp);
2012                         return NT_STATUS_SHARING_VIOLATION;
2013                 }
2014
2015                 /* First pass - send break only on batch oplocks. */
2016                 if ((req != NULL)
2017                     && delay_for_oplocks(lck, fsp, req->mid, 1,
2018                                          oplock_request)) {
2019                         schedule_defer_open(lck, request_time, req);
2020                         TALLOC_FREE(lck);
2021                         fd_close(fsp);
2022                         return NT_STATUS_SHARING_VIOLATION;
2023                 }
2024
2025                 status = open_mode_check(conn, lck, access_mask, share_access,
2026                                          create_options, &file_existed);
2027
2028                 if (NT_STATUS_IS_OK(status)) {
2029                         /* We might be going to allow this open. Check oplock
2030                          * status again. */
2031                         /* Second pass - send break for both batch or
2032                          * exclusive oplocks. */
2033                         if ((req != NULL)
2034                             && delay_for_oplocks(lck, fsp, req->mid, 2,
2035                                                  oplock_request)) {
2036                                 schedule_defer_open(lck, request_time, req);
2037                                 TALLOC_FREE(lck);
2038                                 fd_close(fsp);
2039                                 return NT_STATUS_SHARING_VIOLATION;
2040                         }
2041                 }
2042
2043                 if (!NT_STATUS_IS_OK(status)) {
2044                         struct deferred_open_record state;
2045
2046                         fd_close(fsp);
2047
2048                         state.delayed_for_oplocks = False;
2049                         state.id = id;
2050
2051                         /* Do it all over again immediately. In the second
2052                          * round we will find that the file existed and handle
2053                          * the DELETE_PENDING and FCB cases correctly. No need
2054                          * to duplicate the code here. Essentially this is a
2055                          * "goto top of this function", but don't tell
2056                          * anybody... */
2057
2058                         if (req != NULL) {
2059                                 defer_open(lck, request_time, timeval_zero(),
2060                                            req, &state);
2061                         }
2062                         TALLOC_FREE(lck);
2063                         return status;
2064                 }
2065
2066                 /*
2067                  * We exit this block with the share entry *locked*.....
2068                  */
2069
2070         }
2071
2072         SMB_ASSERT(lck != NULL);
2073
2074         /* Delete streams if create_disposition requires it */
2075         if (file_existed && clear_ads &&
2076             !is_ntfs_stream_smb_fname(smb_fname)) {
2077                 status = delete_all_streams(conn, smb_fname->base_name);
2078                 if (!NT_STATUS_IS_OK(status)) {
2079                         TALLOC_FREE(lck);
2080                         fd_close(fsp);
2081                         return status;
2082                 }
2083         }
2084
2085         /* note that we ignore failure for the following. It is
2086            basically a hack for NFS, and NFS will never set one of
2087            these only read them. Nobody but Samba can ever set a deny
2088            mode and we have already checked our more authoritative
2089            locking database for permission to set this deny mode. If
2090            the kernel refuses the operations then the kernel is wrong.
2091            note that GPFS supports it as well - jmcd */
2092
2093         if (fsp->fh->fd != -1) {
2094                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2095                 if(ret_flock == -1 ){
2096
2097                         TALLOC_FREE(lck);
2098                         fd_close(fsp);
2099
2100                         return NT_STATUS_SHARING_VIOLATION;
2101                 }
2102         }
2103
2104         /*
2105          * At this point onwards, we can guarentee that the share entry
2106          * is locked, whether we created the file or not, and that the
2107          * deny mode is compatible with all current opens.
2108          */
2109
2110         /*
2111          * If requested, truncate the file.
2112          */
2113
2114         if (flags2&O_TRUNC) {
2115                 /*
2116                  * We are modifing the file after open - update the stat
2117                  * struct..
2118                  */
2119                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2120                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2121                         status = map_nt_error_from_unix(errno);
2122                         TALLOC_FREE(lck);
2123                         fd_close(fsp);
2124                         return status;
2125                 }
2126         }
2127
2128         /* Record the options we were opened with. */
2129         fsp->share_access = share_access;
2130         fsp->fh->private_options = create_options;
2131         /*
2132          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2133          */
2134         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2135
2136         if (file_existed) {
2137                 /* stat opens on existing files don't get oplocks. */
2138                 if (is_stat_open(open_access_mask)) {
2139                         fsp->oplock_type = NO_OPLOCK;
2140                 }
2141
2142                 if (!(flags2 & O_TRUNC)) {
2143                         info = FILE_WAS_OPENED;
2144                 } else {
2145                         info = FILE_WAS_OVERWRITTEN;
2146                 }
2147         } else {
2148                 info = FILE_WAS_CREATED;
2149         }
2150
2151         if (pinfo) {
2152                 *pinfo = info;
2153         }
2154
2155         /*
2156          * Setup the oplock info in both the shared memory and
2157          * file structs.
2158          */
2159
2160         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2161                 /* Could not get the kernel oplock */
2162                 fsp->oplock_type = NO_OPLOCK;
2163         }
2164
2165         if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2166                 new_file_created = True;
2167         }
2168
2169         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
2170                        fsp->oplock_type);
2171
2172         /* Handle strange delete on close create semantics. */
2173         if (create_options & FILE_DELETE_ON_CLOSE) {
2174
2175                 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
2176
2177                 if (!NT_STATUS_IS_OK(status)) {
2178                         /* Remember to delete the mode we just added. */
2179                         del_share_mode(lck, fsp);
2180                         TALLOC_FREE(lck);
2181                         fd_close(fsp);
2182                         return status;
2183                 }
2184                 /* Note that here we set the *inital* delete on close flag,
2185                    not the regular one. The magic gets handled in close. */
2186                 fsp->initial_delete_on_close = True;
2187         }
2188
2189         if (new_file_created) {
2190                 /* Files should be initially set as archive */
2191                 if (lp_map_archive(SNUM(conn)) ||
2192                     lp_store_dos_attributes(SNUM(conn))) {
2193                         if (!posix_open) {
2194                                 if (file_set_dosmode(conn, smb_fname,
2195                                             new_dos_attributes | aARCH,
2196                                             parent_dir, true) == 0) {
2197                                         unx_mode = smb_fname->st.st_ex_mode;
2198                                 }
2199                         }
2200                 }
2201         }
2202
2203         /*
2204          * Take care of inherited ACLs on created files - if default ACL not
2205          * selected.
2206          */
2207
2208         if (!posix_open && !file_existed && !def_acl) {
2209
2210                 int saved_errno = errno; /* We might get ENOSYS in the next
2211                                           * call.. */
2212
2213                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2214                     errno == ENOSYS) {
2215                         errno = saved_errno; /* Ignore ENOSYS */
2216                 }
2217
2218         } else if (new_unx_mode) {
2219
2220                 int ret = -1;
2221
2222                 /* Attributes need changing. File already existed. */
2223
2224                 {
2225                         int saved_errno = errno; /* We might get ENOSYS in the
2226                                                   * next call.. */
2227                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2228
2229                         if (ret == -1 && errno == ENOSYS) {
2230                                 errno = saved_errno; /* Ignore ENOSYS */
2231                         } else {
2232                                 DEBUG(5, ("open_file_ntcreate: reset "
2233                                           "attributes of file %s to 0%o\n",
2234                                           smb_fname_str_dbg(smb_fname),
2235                                           (unsigned int)new_unx_mode));
2236                                 ret = 0; /* Don't do the fchmod below. */
2237                         }
2238                 }
2239
2240                 if ((ret == -1) &&
2241                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2242                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2243                                   "attributes of file %s to 0%o\n",
2244                                   smb_fname_str_dbg(smb_fname),
2245                                   (unsigned int)new_unx_mode));
2246         }
2247
2248         /* If this is a successful open, we must remove any deferred open
2249          * records. */
2250         if (req != NULL) {
2251                 del_deferred_open_entry(lck, req->mid);
2252         }
2253         TALLOC_FREE(lck);
2254
2255         return NT_STATUS_OK;
2256 }
2257
2258
2259 /****************************************************************************
2260  Open a file for for write to ensure that we can fchmod it.
2261 ****************************************************************************/
2262
2263 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
2264                           struct smb_filename *smb_fname,
2265                           files_struct **result)
2266 {
2267         files_struct *fsp = NULL;
2268         NTSTATUS status;
2269
2270         if (!VALID_STAT(smb_fname->st)) {
2271                 return NT_STATUS_INVALID_PARAMETER;
2272         }
2273
2274         status = file_new(req, conn, &fsp);
2275         if(!NT_STATUS_IS_OK(status)) {
2276                 return status;
2277         }
2278
2279         status = SMB_VFS_CREATE_FILE(
2280                 conn,                                   /* conn */
2281                 NULL,                                   /* req */
2282                 0,                                      /* root_dir_fid */
2283                 smb_fname,                              /* fname */
2284                 FILE_WRITE_DATA,                        /* access_mask */
2285                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2286                     FILE_SHARE_DELETE),
2287                 FILE_OPEN,                              /* create_disposition*/
2288                 0,                                      /* create_options */
2289                 0,                                      /* file_attributes */
2290                 0,                                      /* oplock_request */
2291                 0,                                      /* allocation_size */
2292                 NULL,                                   /* sd */
2293                 NULL,                                   /* ea_list */
2294                 &fsp,                                   /* result */
2295                 NULL);                                  /* pinfo */
2296
2297         /*
2298          * This is not a user visible file open.
2299          * Don't set a share mode.
2300          */
2301
2302         if (!NT_STATUS_IS_OK(status)) {
2303                 file_free(req, fsp);
2304                 return status;
2305         }
2306
2307         *result = fsp;
2308         return NT_STATUS_OK;
2309 }
2310
2311 /****************************************************************************
2312  Close the fchmod file fd - ensure no locks are lost.
2313 ****************************************************************************/
2314
2315 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2316 {
2317         NTSTATUS status = fd_close(fsp);
2318         file_free(req, fsp);
2319         return status;
2320 }
2321
2322 static NTSTATUS mkdir_internal(connection_struct *conn,
2323                                struct smb_filename *smb_dname,
2324                                uint32 file_attributes)
2325 {
2326         mode_t mode;
2327         char *parent_dir;
2328         NTSTATUS status;
2329         bool posix_open = false;
2330
2331         if(!CAN_WRITE(conn)) {
2332                 DEBUG(5,("mkdir_internal: failing create on read-only share "
2333                          "%s\n", lp_servicename(SNUM(conn))));
2334                 return NT_STATUS_ACCESS_DENIED;
2335         }
2336
2337         status = check_name(conn, smb_dname->base_name);
2338         if (!NT_STATUS_IS_OK(status)) {
2339                 return status;
2340         }
2341
2342         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2343                             NULL)) {
2344                 return NT_STATUS_NO_MEMORY;
2345         }
2346
2347         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2348                 posix_open = true;
2349                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2350         } else {
2351                 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2352         }
2353
2354         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2355                 return map_nt_error_from_unix(errno);
2356         }
2357
2358         /* Ensure we're checking for a symlink here.... */
2359         /* We don't want to get caught by a symlink racer. */
2360
2361         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2362                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2363                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2364                 return map_nt_error_from_unix(errno);
2365         }
2366
2367         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2368                 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2369                           smb_fname_str_dbg(smb_dname)));
2370                 return NT_STATUS_ACCESS_DENIED;
2371         }
2372
2373         if (lp_store_dos_attributes(SNUM(conn))) {
2374                 if (!posix_open) {
2375                         file_set_dosmode(conn, smb_dname,
2376                                          file_attributes | aDIR,
2377                                          parent_dir, true);
2378                 }
2379         }
2380
2381         if (lp_inherit_perms(SNUM(conn))) {
2382                 inherit_access_posix_acl(conn, parent_dir,
2383                                          smb_dname->base_name, mode);
2384         }
2385
2386         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2387                 /*
2388                  * Check if high bits should have been set,
2389                  * then (if bits are missing): add them.
2390                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2391                  * dir.
2392                  */
2393                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2394                     (mode & ~smb_dname->st.st_ex_mode)) {
2395                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2396                                       (smb_dname->st.st_ex_mode |
2397                                           (mode & ~smb_dname->st.st_ex_mode)));
2398                 }
2399         }
2400
2401         /* Change the owner if required. */
2402         if (lp_inherit_owner(SNUM(conn))) {
2403                 change_dir_owner_to_parent(conn, parent_dir,
2404                                            smb_dname->base_name,
2405                                            &smb_dname->st);
2406         }
2407
2408         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2409                      smb_dname->base_name);
2410
2411         return NT_STATUS_OK;
2412 }
2413
2414 /****************************************************************************
2415  Open a directory from an NT SMB call.
2416 ****************************************************************************/
2417
2418 static NTSTATUS open_directory(connection_struct *conn,
2419                                struct smb_request *req,
2420                                struct smb_filename *smb_dname,
2421                                uint32 access_mask,
2422                                uint32 share_access,
2423                                uint32 create_disposition,
2424                                uint32 create_options,
2425                                uint32 file_attributes,
2426                                int *pinfo,
2427                                files_struct **result)
2428 {
2429         files_struct *fsp = NULL;
2430         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2431         struct share_mode_lock *lck = NULL;
2432         NTSTATUS status;
2433         struct timespec mtimespec;
2434         int info = 0;
2435
2436         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2437
2438         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2439                  "share_access = 0x%x create_options = 0x%x, "
2440                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2441                  smb_fname_str_dbg(smb_dname),
2442                  (unsigned int)access_mask,
2443                  (unsigned int)share_access,
2444                  (unsigned int)create_options,
2445                  (unsigned int)create_disposition,
2446                  (unsigned int)file_attributes));
2447
2448         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2449                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2450                         is_ntfs_stream_smb_fname(smb_dname)) {
2451                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2452                           smb_fname_str_dbg(smb_dname)));
2453                 return NT_STATUS_NOT_A_DIRECTORY;
2454         }
2455
2456         status = calculate_access_mask(conn, smb_dname, dir_existed,
2457                                        access_mask, &access_mask);
2458         if (!NT_STATUS_IS_OK(status)) {
2459                 DEBUG(10, ("open_directory: calculate_access_mask "
2460                         "on file %s returned %s\n",
2461                         smb_fname_str_dbg(smb_dname),
2462                         nt_errstr(status)));
2463                 return status;
2464         }
2465
2466         /* We need to support SeSecurityPrivilege for this. */
2467         if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
2468                 DEBUG(10, ("open_directory: open on %s "
2469                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2470                         smb_fname_str_dbg(smb_dname)));
2471                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2472         }
2473
2474         switch( create_disposition ) {
2475                 case FILE_OPEN:
2476
2477                         info = FILE_WAS_OPENED;
2478
2479                         /*
2480                          * We want to follow symlinks here.
2481                          */
2482
2483                         if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2484                                 return map_nt_error_from_unix(errno);
2485                         }
2486                                 
2487                         break;
2488
2489                 case FILE_CREATE:
2490
2491                         /* If directory exists error. If directory doesn't
2492                          * exist create. */
2493
2494                         status = mkdir_internal(conn, smb_dname,
2495                                                 file_attributes);
2496
2497                         if (!NT_STATUS_IS_OK(status)) {
2498                                 DEBUG(2, ("open_directory: unable to create "
2499                                           "%s. Error was %s\n",
2500                                           smb_fname_str_dbg(smb_dname),
2501                                           nt_errstr(status)));
2502                                 return status;
2503                         }
2504
2505                         info = FILE_WAS_CREATED;
2506                         break;
2507
2508                 case FILE_OPEN_IF:
2509                         /*
2510                          * If directory exists open. If directory doesn't
2511                          * exist create.
2512                          */
2513
2514                         status = mkdir_internal(conn, smb_dname,
2515                                                 file_attributes);
2516
2517                         if (NT_STATUS_IS_OK(status)) {
2518                                 info = FILE_WAS_CREATED;
2519                         }
2520
2521                         if (NT_STATUS_EQUAL(status,
2522                                             NT_STATUS_OBJECT_NAME_COLLISION)) {
2523                                 info = FILE_WAS_OPENED;
2524                                 status = NT_STATUS_OK;
2525                         }
2526                                 
2527                         break;
2528
2529                 case FILE_SUPERSEDE:
2530                 case FILE_OVERWRITE:
2531                 case FILE_OVERWRITE_IF:
2532                 default:
2533                         DEBUG(5,("open_directory: invalid create_disposition "
2534                                  "0x%x for directory %s\n",
2535                                  (unsigned int)create_disposition,
2536                                  smb_fname_str_dbg(smb_dname)));
2537                         return NT_STATUS_INVALID_PARAMETER;
2538         }
2539
2540         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2541                 DEBUG(5,("open_directory: %s is not a directory !\n",
2542                          smb_fname_str_dbg(smb_dname)));
2543                 return NT_STATUS_NOT_A_DIRECTORY;
2544         }
2545
2546         if (info == FILE_WAS_OPENED) {
2547                 uint32_t access_granted = 0;
2548                 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2549                                                 &access_granted);
2550
2551                 /* Were we trying to do a directory open
2552                  * for delete and didn't get DELETE
2553                  * access (only) ? Check if the
2554                  * directory allows DELETE_CHILD.
2555                  * See here:
2556                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2557                  * for details. */
2558
2559                 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2560                         (access_mask & DELETE_ACCESS) &&
2561                         (access_granted == DELETE_ACCESS) &&
2562                         can_delete_file_in_directory(conn, smb_dname))) {
2563                         DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2564                                 "on directory %s\n",
2565                                 smb_fname_str_dbg(smb_dname)));
2566                         status = NT_STATUS_OK;
2567                 }
2568
2569                 if (!NT_STATUS_IS_OK(status)) {
2570                         DEBUG(10, ("open_directory: smbd_check_open_rights on "
2571                                 "file %s failed with %s\n",
2572                                 smb_fname_str_dbg(smb_dname),
2573                                 nt_errstr(status)));
2574                         return status;
2575                 }
2576         }
2577
2578         status = file_new(req, conn, &fsp);
2579         if(!NT_STATUS_IS_OK(status)) {
2580                 return status;
2581         }
2582
2583         /*
2584          * Setup the files_struct for it.
2585          */
2586         
2587         fsp->mode = smb_dname->st.st_ex_mode;
2588         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2589         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2590         fsp->file_pid = req ? req->smbpid : 0;
2591         fsp->can_lock = False;
2592         fsp->can_read = False;
2593         fsp->can_write = False;
2594
2595         fsp->share_access = share_access;
2596         fsp->fh->private_options = create_options;
2597         /*
2598          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2599          */
2600         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2601         fsp->print_file = False;
2602         fsp->modified = False;
2603         fsp->oplock_type = NO_OPLOCK;
2604         fsp->sent_oplock_break = NO_BREAK_SENT;
2605         fsp->is_directory = True;
2606         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2607         status = fsp_set_smb_fname(fsp, smb_dname);
2608         if (!NT_STATUS_IS_OK(status)) {
2609                 return status;
2610         }
2611
2612         mtimespec = smb_dname->st.st_ex_mtime;
2613
2614         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2615                                   conn->connectpath, smb_dname, &mtimespec);
2616
2617         if (lck == NULL) {
2618                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2619                           "%s\n", smb_fname_str_dbg(smb_dname)));
2620                 file_free(req, fsp);
2621                 return NT_STATUS_SHARING_VIOLATION;
2622         }
2623
2624         status = open_mode_check(conn, lck, access_mask, share_access,
2625                                  create_options, &dir_existed);
2626
2627         if (!NT_STATUS_IS_OK(status)) {
2628                 TALLOC_FREE(lck);
2629                 file_free(req, fsp);
2630                 return status;
2631         }
2632
2633         set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK);
2634
2635         /* For directories the delete on close bit at open time seems
2636            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2637         if (create_options & FILE_DELETE_ON_CLOSE) {
2638                 status = can_set_delete_on_close(fsp, True, 0);
2639                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2640                         TALLOC_FREE(lck);
2641                         file_free(req, fsp);
2642                         return status;
2643                 }
2644
2645                 if (NT_STATUS_IS_OK(status)) {
2646                         /* Note that here we set the *inital* delete on close flag,
2647                            not the regular one. The magic gets handled in close. */
2648                         fsp->initial_delete_on_close = True;
2649                 }
2650         }
2651
2652         TALLOC_FREE(lck);
2653
2654         if (pinfo) {
2655                 *pinfo = info;
2656         }
2657
2658         *result = fsp;
2659         return NT_STATUS_OK;
2660 }
2661
2662 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2663                           struct smb_filename *smb_dname)
2664 {
2665         NTSTATUS status;
2666         files_struct *fsp;
2667
2668         status = SMB_VFS_CREATE_FILE(
2669                 conn,                                   /* conn */
2670                 req,                                    /* req */
2671                 0,                                      /* root_dir_fid */
2672                 smb_dname,                              /* fname */
2673                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2674                 FILE_SHARE_NONE,                        /* share_access */
2675                 FILE_CREATE,                            /* create_disposition*/
2676                 FILE_DIRECTORY_FILE,                    /* create_options */
2677                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2678                 0,                                      /* oplock_request */
2679                 0,                                      /* allocation_size */
2680                 NULL,                                   /* sd */
2681                 NULL,                                   /* ea_list */
2682                 &fsp,                                   /* result */
2683                 NULL);                                  /* pinfo */
2684
2685         if (NT_STATUS_IS_OK(status)) {
2686                 close_file(req, fsp, NORMAL_CLOSE);
2687         }
2688
2689         return status;
2690 }
2691
2692 /****************************************************************************
2693  Receive notification that one of our open files has been renamed by another
2694  smbd process.
2695 ****************************************************************************/
2696
2697 void msg_file_was_renamed(struct messaging_context *msg,
2698                           void *private_data,
2699                           uint32_t msg_type,
2700                           struct server_id server_id,
2701                           DATA_BLOB *data)
2702 {
2703         files_struct *fsp;
2704         char *frm = (char *)data->data;
2705         struct file_id id;
2706         const char *sharepath;
2707         const char *base_name;
2708         const char *stream_name;
2709         struct smb_filename *smb_fname = NULL;
2710         size_t sp_len, bn_len;
2711         NTSTATUS status;
2712
2713         if (data->data == NULL
2714             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2715                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2716                           (int)data->length));
2717                 return;
2718         }
2719
2720         /* Unpack the message. */
2721         pull_file_id_24(frm, &id);
2722         sharepath = &frm[24];
2723         sp_len = strlen(sharepath);
2724         base_name = sharepath + sp_len + 1;
2725         bn_len = strlen(base_name);
2726         stream_name = sharepath + sp_len + 1 + bn_len + 1;
2727
2728         /* stream_name must always be NULL if there is no stream. */
2729         if (stream_name[0] == '\0') {
2730                 stream_name = NULL;
2731         }
2732
2733         status = create_synthetic_smb_fname(talloc_tos(), base_name,
2734                                             stream_name, NULL, &smb_fname);
2735         if (!NT_STATUS_IS_OK(status)) {
2736                 return;
2737         }
2738
2739         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2740                 "file_id %s\n",
2741                 sharepath, smb_fname_str_dbg(smb_fname),
2742                 file_id_string_tos(&id)));
2743
2744         for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2745                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2746
2747                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2748                                 fsp->fnum, fsp_str_dbg(fsp),
2749                                 smb_fname_str_dbg(smb_fname)));
2750                         status = fsp_set_smb_fname(fsp, smb_fname);
2751                         if (!NT_STATUS_IS_OK(status)) {
2752                                 goto out;
2753                         }
2754                 } else {
2755                         /* TODO. JRA. */
2756                         /* Now we have the complete path we can work out if this is
2757                            actually within this share and adjust newname accordingly. */
2758                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2759                                 "not sharepath %s) "
2760                                 "fnum %d from %s -> %s\n",
2761                                 fsp->conn->connectpath,
2762                                 sharepath,
2763                                 fsp->fnum,
2764                                 fsp_str_dbg(fsp),
2765                                 smb_fname_str_dbg(smb_fname)));
2766                 }
2767         }
2768  out:
2769         TALLOC_FREE(smb_fname);
2770         return;
2771 }
2772
2773 struct case_semantics_state {
2774         connection_struct *conn;
2775         bool case_sensitive;
2776         bool case_preserve;
2777         bool short_case_preserve;
2778 };
2779
2780 /****************************************************************************
2781  Restore case semantics.
2782 ****************************************************************************/
2783 static int restore_case_semantics(struct case_semantics_state *state)
2784 {
2785         state->conn->case_sensitive = state->case_sensitive;
2786         state->conn->case_preserve = state->case_preserve;
2787         state->conn->short_case_preserve = state->short_case_preserve;
2788         return 0;
2789 }
2790
2791 /****************************************************************************
2792  Save case semantics.
2793 ****************************************************************************/
2794 struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2795                                                       connection_struct *conn)
2796 {
2797         struct case_semantics_state *result;
2798
2799         if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2800                 DEBUG(0, ("talloc failed\n"));
2801                 return NULL;
2802         }
2803
2804         result->conn = conn;
2805         result->case_sensitive = conn->case_sensitive;
2806         result->case_preserve = conn->case_preserve;
2807         result->short_case_preserve = conn->short_case_preserve;
2808
2809         /* Set to POSIX. */
2810         conn->case_sensitive = True;
2811         conn->case_preserve = True;
2812         conn->short_case_preserve = True;
2813
2814         talloc_set_destructor(result, restore_case_semantics);
2815
2816         return result;
2817 }
2818
2819 /*
2820  * If a main file is opened for delete, all streams need to be checked for
2821  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2822  * If that works, delete them all by setting the delete on close and close.
2823  */
2824
2825 NTSTATUS open_streams_for_delete(connection_struct *conn,
2826                                         const char *fname)
2827 {
2828         struct stream_struct *stream_info;
2829         files_struct **streams;
2830         int i;
2831         unsigned int num_streams;
2832         TALLOC_CTX *frame = talloc_stackframe();
2833         NTSTATUS status;
2834
2835         status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2836                                     &num_streams, &stream_info);
2837
2838         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2839             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2840                 DEBUG(10, ("no streams around\n"));
2841                 TALLOC_FREE(frame);
2842                 return NT_STATUS_OK;
2843         }
2844
2845         if (!NT_STATUS_IS_OK(status)) {
2846                 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2847                            nt_errstr(status)));
2848                 goto fail;
2849         }
2850
2851         DEBUG(10, ("open_streams_for_delete found %d streams\n",
2852                    num_streams));
2853
2854         if (num_streams == 0) {
2855                 TALLOC_FREE(frame);
2856                 return NT_STATUS_OK;
2857         }
2858
2859         streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2860         if (streams == NULL) {
2861                 DEBUG(0, ("talloc failed\n"));
2862                 status = NT_STATUS_NO_MEMORY;
2863                 goto fail;
2864         }
2865
2866         for (i=0; i<num_streams; i++) {
2867                 struct smb_filename *smb_fname = NULL;
2868
2869                 if (strequal(stream_info[i].name, "::$DATA")) {
2870                         streams[i] = NULL;
2871                         continue;
2872                 }
2873
2874                 status = create_synthetic_smb_fname(talloc_tos(), fname,
2875                                                     stream_info[i].name,
2876                                                     NULL, &smb_fname);
2877                 if (!NT_STATUS_IS_OK(status)) {
2878                         goto fail;
2879                 }
2880
2881                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2882                         DEBUG(10, ("Unable to stat stream: %s\n",
2883                                    smb_fname_str_dbg(smb_fname)));
2884                 }
2885
2886                 status = SMB_VFS_CREATE_FILE(
2887                          conn,                  /* conn */
2888                          NULL,                  /* req */
2889                          0,                     /* root_dir_fid */
2890                          smb_fname,             /* fname */
2891                          DELETE_ACCESS,         /* access_mask */
2892                          (FILE_SHARE_READ |     /* share_access */
2893                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2894                          FILE_OPEN,             /* create_disposition*/
2895                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2896                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2897                          0,                     /* oplock_request */
2898                          0,                     /* allocation_size */
2899                          NULL,                  /* sd */
2900                          NULL,                  /* ea_list */
2901                          &streams[i],           /* result */
2902                          NULL);                 /* pinfo */
2903
2904                 if (!NT_STATUS_IS_OK(status)) {
2905                         DEBUG(10, ("Could not open stream %s: %s\n",
2906                                    smb_fname_str_dbg(smb_fname),
2907                                    nt_errstr(status)));
2908
2909                         TALLOC_FREE(smb_fname);
2910                         break;
2911                 }
2912                 TALLOC_FREE(smb_fname);
2913         }
2914
2915         /*
2916          * don't touch the variable "status" beyond this point :-)
2917          */
2918
2919         for (i -= 1 ; i >= 0; i--) {
2920                 if (streams[i] == NULL) {
2921                         continue;
2922                 }
2923
2924                 DEBUG(10, ("Closing stream # %d, %s\n", i,
2925                            fsp_str_dbg(streams[i])));
2926                 close_file(NULL, streams[i], NORMAL_CLOSE);
2927         }
2928
2929  fail:
2930         TALLOC_FREE(frame);
2931         return status;
2932 }
2933
2934 /*
2935  * Wrapper around open_file_ntcreate and open_directory
2936  */
2937
2938 static NTSTATUS create_file_unixpath(connection_struct *conn,
2939                                      struct smb_request *req,
2940                                      struct smb_filename *smb_fname,
2941                                      uint32_t access_mask,
2942                                      uint32_t share_access,
2943                                      uint32_t create_disposition,
2944                                      uint32_t create_options,
2945                                      uint32_t file_attributes,
2946                                      uint32_t oplock_request,
2947                                      uint64_t allocation_size,
2948                                      struct security_descriptor *sd,
2949                                      struct ea_list *ea_list,
2950
2951                                      files_struct **result,
2952                                      int *pinfo)
2953 {
2954         int info = FILE_WAS_OPENED;
2955         files_struct *base_fsp = NULL;
2956         files_struct *fsp = NULL;
2957         NTSTATUS status;
2958
2959         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2960                   "file_attributes = 0x%x, share_access = 0x%x, "
2961                   "create_disposition = 0x%x create_options = 0x%x "
2962                   "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2963                   "fname = %s\n",
2964                   (unsigned int)access_mask,
2965                   (unsigned int)file_attributes,
2966                   (unsigned int)share_access,
2967                   (unsigned int)create_disposition,
2968                   (unsigned int)create_options,
2969                   (unsigned int)oplock_request,
2970                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
2971
2972         if (create_options & FILE_OPEN_BY_FILE_ID) {
2973                 status = NT_STATUS_NOT_SUPPORTED;
2974                 goto fail;
2975         }
2976
2977         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2978                 status = NT_STATUS_INVALID_PARAMETER;
2979                 goto fail;
2980         }
2981
2982         if (req == NULL) {
2983                 oplock_request |= INTERNAL_OPEN_ONLY;
2984         }
2985
2986         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2987             && (access_mask & DELETE_ACCESS)
2988             && !is_ntfs_stream_smb_fname(smb_fname)) {
2989                 /*
2990                  * We can't open a file with DELETE access if any of the
2991                  * streams is open without FILE_SHARE_DELETE
2992                  */
2993                 status = open_streams_for_delete(conn, smb_fname->base_name);
2994
2995                 if (!NT_STATUS_IS_OK(status)) {
2996                         goto fail;
2997                 }
2998         }
2999
3000         /* This is the correct thing to do (check every time) but can_delete
3001          * is expensive (it may have to read the parent directory
3002          * permissions). So for now we're not doing it unless we have a strong
3003          * hint the client is really going to delete this file. If the client
3004          * is forcing FILE_CREATE let the filesystem take care of the
3005          * permissions. */
3006
3007         /* Setting FILE_SHARE_DELETE is the hint. */
3008
3009         if (lp_acl_check_permissions(SNUM(conn))
3010             && (create_disposition != FILE_CREATE)
3011             && (share_access & FILE_SHARE_DELETE)
3012             && (access_mask & DELETE_ACCESS)
3013             && (!(can_delete_file_in_directory(conn, smb_fname) ||
3014                  can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3015                 status = NT_STATUS_ACCESS_DENIED;
3016                 DEBUG(10,("create_file_unixpath: open file %s "
3017                           "for delete ACCESS_DENIED\n",
3018                           smb_fname_str_dbg(smb_fname)));
3019                 goto fail;
3020         }
3021
3022 #if 0
3023         /* We need to support SeSecurityPrivilege for this. */
3024         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3025             !user_has_privileges(current_user.nt_user_token,
3026                                  &se_security)) {
3027                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3028                 goto fail;
3029         }
3030 #else
3031         /* We need to support SeSecurityPrivilege for this. */
3032         if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
3033                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3034                 goto fail;
3035         }
3036         /* Don't allow a SACL set from an NTtrans create until we
3037          * support SeSecurityPrivilege. */
3038         if (!VALID_STAT(smb_fname->st) &&
3039                         lp_nt_acl_support(SNUM(conn)) &&
3040                         sd && (sd->sacl != NULL)) {
3041                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3042                 goto fail;
3043         }
3044 #endif
3045
3046         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3047             && is_ntfs_stream_smb_fname(smb_fname)
3048             && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3049                 uint32 base_create_disposition;
3050                 struct smb_filename *smb_fname_base = NULL;
3051
3052                 if (create_options & FILE_DIRECTORY_FILE) {
3053                         status = NT_STATUS_NOT_A_DIRECTORY;
3054                         goto fail;
3055                 }
3056
3057                 switch (create_disposition) {
3058                 case FILE_OPEN:
3059                         base_create_disposition = FILE_OPEN;
3060                         break;
3061                 default:
3062                         base_create_disposition = FILE_OPEN_IF;
3063                         break;
3064                 }
3065
3066                 /* Create an smb_filename with stream_name == NULL. */
3067                 status = create_synthetic_smb_fname(talloc_tos(),
3068                                                     smb_fname->base_name,
3069                                                     NULL, NULL,
3070                                                     &smb_fname_base);
3071                 if (!NT_STATUS_IS_OK(status)) {
3072                         goto fail;
3073                 }
3074
3075                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3076                         DEBUG(10, ("Unable to stat stream: %s\n",
3077                                    smb_fname_str_dbg(smb_fname_base)));
3078                 }
3079
3080                 /* Open the base file. */
3081                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3082                                               FILE_SHARE_READ
3083                                               | FILE_SHARE_WRITE
3084                                               | FILE_SHARE_DELETE,
3085                                               base_create_disposition,
3086                                               0, 0, 0, 0, NULL, NULL,
3087                                               &base_fsp, NULL);
3088                 TALLOC_FREE(smb_fname_base);
3089
3090                 if (!NT_STATUS_IS_OK(status)) {
3091                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3092                                    "%s\n", smb_fname->base_name,
3093                                    nt_errstr(status)));
3094                         goto fail;
3095                 }
3096                 /* we don't need to low level fd */
3097                 fd_close(base_fsp);
3098         }
3099
3100         /*
3101          * If it's a request for a directory open, deal with it separately.
3102          */
3103
3104         if (create_options & FILE_DIRECTORY_FILE) {
3105
3106                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3107                         status = NT_STATUS_INVALID_PARAMETER;
3108                         goto fail;
3109                 }
3110
3111                 /* Can't open a temp directory. IFS kit test. */
3112                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3113                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3114                         status = NT_STATUS_INVALID_PARAMETER;
3115                         goto fail;
3116                 }
3117
3118                 /*
3119                  * We will get a create directory here if the Win32
3120                  * app specified a security descriptor in the
3121                  * CreateDirectory() call.
3122                  */
3123
3124                 oplock_request = 0;
3125                 status = open_directory(
3126                         conn, req, smb_fname, access_mask, share_access,
3127                         create_disposition, create_options, file_attributes,
3128                         &info, &fsp);
3129         } else {
3130
3131                 /*
3132                  * Ordinary file case.
3133                  */
3134
3135                 status = file_new(req, conn, &fsp);
3136                 if(!NT_STATUS_IS_OK(status)) {
3137                         goto fail;
3138                 }
3139
3140                 /*
3141                  * We're opening the stream element of a base_fsp
3142                  * we already opened. Set up the base_fsp pointer.
3143                  */
3144                 if (base_fsp) {
3145                         fsp->base_fsp = base_fsp;
3146                 }
3147
3148                 status = open_file_ntcreate(conn,
3149                                             req,
3150                                             smb_fname,
3151                                             access_mask,
3152                                             share_access,
3153                                             create_disposition,
3154                                             create_options,
3155                                             file_attributes,
3156                                             oplock_request,
3157                                             &info,
3158                                             fsp);
3159
3160                 if(!NT_STATUS_IS_OK(status)) {
3161                         file_free(req, fsp);
3162                         fsp = NULL;
3163                 }
3164
3165                 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3166
3167                         /* A stream open never opens a directory */
3168
3169                         if (base_fsp) {
3170                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3171                                 goto fail;
3172                         }
3173
3174                         /*
3175                          * Fail the open if it was explicitly a non-directory
3176                          * file.
3177                          */
3178
3179                         if (create_options & FILE_NON_DIRECTORY_FILE) {
3180                                 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3181                                 goto fail;
3182                         }
3183
3184                         oplock_request = 0;
3185                         status = open_directory(
3186                                 conn, req, smb_fname, access_mask,
3187                                 share_access, create_disposition,
3188                                 create_options, file_attributes,
3189                                 &info, &fsp);
3190                 }
3191         }
3192
3193         if (!NT_STATUS_IS_OK(status)) {
3194                 goto fail;
3195         }
3196
3197         fsp->base_fsp = base_fsp;
3198
3199         /*
3200          * According to the MS documentation, the only time the security
3201          * descriptor is applied to the opened file is iff we *created* the
3202          * file; an existing file stays the same.
3203          *
3204          * Also, it seems (from observation) that you can open the file with
3205          * any access mask but you can still write the sd. We need to override
3206          * the granted access before we call set_sd
3207          * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3208          */
3209
3210         if ((sd != NULL) && (info == FILE_WAS_CREATED)
3211             && lp_nt_acl_support(SNUM(conn))) {
3212
3213                 uint32_t sec_info_sent;
3214                 uint32_t saved_access_mask = fsp->access_mask;
3215
3216                 sec_info_sent = get_sec_info(sd);
3217
3218                 fsp->access_mask = FILE_GENERIC_ALL;
3219
3220                 /* Convert all the generic bits. */
3221                 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3222                 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3223
3224                 if (sec_info_sent & (OWNER_SECURITY_INFORMATION|
3225                                         GROUP_SECURITY_INFORMATION|
3226                                         DACL_SECURITY_INFORMATION|
3227                                         SACL_SECURITY_INFORMATION)) {
3228                         status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3229                 }
3230
3231                 fsp->access_mask = saved_access_mask;
3232
3233                 if (!NT_STATUS_IS_OK(status)) {
3234                         goto fail;
3235                 }
3236         }
3237
3238         if ((ea_list != NULL) &&
3239             ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3240                 status = set_ea(conn, fsp, smb_fname, ea_list);
3241                 if (!NT_STATUS_IS_OK(status)) {
3242                         goto fail;
3243                 }
3244         }
3245
3246         if (!fsp->is_directory && S_ISDIR(smb_fname->st.st_ex_mode)) {
3247                 status = NT_STATUS_ACCESS_DENIED;
3248                 goto fail;
3249         }
3250
3251         /* Save the requested allocation size. */
3252         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3253                 if (allocation_size
3254                     && (allocation_size > smb_fname->st.st_ex_size)) {
3255                         fsp->initial_allocation_size = smb_roundup(
3256                                 fsp->conn, allocation_size);
3257                         if (fsp->is_directory) {
3258                                 /* Can't set allocation size on a directory. */
3259                                 status = NT_STATUS_ACCESS_DENIED;
3260                                 goto fail;
3261                         }
3262                         if (vfs_allocate_file_space(
3263                                     fsp, fsp->initial_allocation_size) == -1) {
3264                                 status = NT_STATUS_DISK_FULL;
3265                                 goto fail;
3266                         }
3267                 } else {
3268                         fsp->initial_allocation_size = smb_roundup(
3269                                 fsp->conn, (uint64_t)smb_fname->st.st_ex_size);
3270                 }
3271         }
3272
3273         DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3274
3275         *result = fsp;
3276         if (pinfo != NULL) {
3277                 *pinfo = info;
3278         }
3279         if ((fsp->fh != NULL) && (fsp->fh->fd != -1)) {
3280                 SMB_VFS_FSTAT(fsp, &smb_fname->st);
3281                 fsp->fsp_name->st = smb_fname->st;
3282         }
3283
3284         /* Try and make a create timestamp, if required. */
3285         if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3286                 if (lp_store_create_time(SNUM(conn))) {
3287                         set_create_timespec_ea(conn, fsp,
3288                                 smb_fname, smb_fname->st.st_ex_btime);
3289                 }
3290         }
3291
3292         return NT_STATUS_OK;
3293
3294  fail:
3295         DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3296
3297         if (fsp != NULL) {
3298                 if (base_fsp && fsp->base_fsp == base_fsp) {
3299                         /*
3300                          * The close_file below will close
3301                          * fsp->base_fsp.
3302                          */
3303                         base_fsp = NULL;
3304                 }
3305                 close_file(req, fsp, ERROR_CLOSE);
3306                 fsp = NULL;
3307         }
3308         if (base_fsp != NULL) {
3309                 close_file(req, base_fsp, ERROR_CLOSE);
3310                 base_fsp = NULL;
3311         }
3312         return status;
3313 }
3314
3315 /*
3316  * Calculate the full path name given a relative fid.
3317  */
3318 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3319                                    struct smb_request *req,
3320                                    uint16_t root_dir_fid,
3321                                    struct smb_filename *smb_fname)
3322 {
3323         files_struct *dir_fsp;
3324         char *parent_fname = NULL;
3325         char *new_base_name = NULL;
3326         NTSTATUS status;
3327
3328         if (root_dir_fid == 0 || !smb_fname) {
3329                 status = NT_STATUS_INTERNAL_ERROR;
3330                 goto out;
3331         }
3332
3333         dir_fsp = file_fsp(req, root_dir_fid);
3334
3335         if (dir_fsp == NULL) {
3336                 status = NT_STATUS_INVALID_HANDLE;
3337                 goto out;
3338         }
3339
3340         if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3341                 status = NT_STATUS_INVALID_HANDLE;
3342                 goto out;
3343         }
3344
3345         if (!dir_fsp->is_directory) {
3346
3347                 /*
3348                  * Check to see if this is a mac fork of some kind.
3349                  */
3350
3351                 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3352                     is_ntfs_stream_smb_fname(smb_fname)) {
3353                         status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3354                         goto out;
3355                 }
3356
3357                 /*
3358                   we need to handle the case when we get a
3359                   relative open relative to a file and the
3360                   pathname is blank - this is a reopen!
3361                   (hint from demyn plantenberg)
3362                 */
3363
3364                 status = NT_STATUS_INVALID_HANDLE;
3365                 goto out;
3366         }
3367
3368         if (ISDOT(dir_fsp->fsp_name->base_name)) {
3369                 /*
3370                  * We're at the toplevel dir, the final file name
3371                  * must not contain ./, as this is filtered out
3372                  * normally by srvstr_get_path and unix_convert
3373                  * explicitly rejects paths containing ./.
3374                  */
3375                 parent_fname = talloc_strdup(talloc_tos(), "");
3376                 if (parent_fname == NULL) {
3377                         status = NT_STATUS_NO_MEMORY;
3378                         goto out;
3379                 }
3380         } else {
3381                 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3382
3383                 /*
3384                  * Copy in the base directory name.
3385                  */
3386
3387                 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3388                     dir_name_len+2);
3389                 if (parent_fname == NULL) {
3390                         status = NT_STATUS_NO_MEMORY;
3391                         goto out;
3392                 }
3393                 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3394                     dir_name_len+1);
3395
3396                 /*
3397                  * Ensure it ends in a '/'.
3398                  * We used TALLOC_SIZE +2 to add space for the '/'.
3399                  */
3400
3401                 if(dir_name_len
3402                     && (parent_fname[dir_name_len-1] != '\\')
3403                     && (parent_fname[dir_name_len-1] != '/')) {
3404                         parent_fname[dir_name_len] = '/';
3405                         parent_fname[dir_name_len+1] = '\0';
3406                 }
3407         }
3408
3409         new_base_name = talloc_asprintf(smb_fname, "%s%s", parent_fname,
3410                                         smb_fname->base_name);
3411         if (new_base_name == NULL) {
3412                 status = NT_STATUS_NO_MEMORY;
3413                 goto out;
3414         }
3415
3416         TALLOC_FREE(smb_fname->base_name);
3417         smb_fname->base_name = new_base_name;
3418         status = NT_STATUS_OK;
3419
3420  out:
3421         TALLOC_FREE(parent_fname);
3422         return status;
3423 }
3424
3425 NTSTATUS create_file_default(connection_struct *conn,
3426                              struct smb_request *req,
3427                              uint16_t root_dir_fid,
3428                              struct smb_filename *smb_fname,
3429                              uint32_t access_mask,
3430                              uint32_t share_access,
3431                              uint32_t create_disposition,
3432                              uint32_t create_options,
3433                              uint32_t file_attributes,
3434                              uint32_t oplock_request,
3435                              uint64_t allocation_size,
3436                              struct security_descriptor *sd,
3437                              struct ea_list *ea_list,
3438                              files_struct **result,
3439                              int *pinfo)
3440 {
3441         int info = FILE_WAS_OPENED;
3442         files_struct *fsp = NULL;
3443         NTSTATUS status;
3444
3445         DEBUG(10,("create_file: access_mask = 0x%x "
3446                   "file_attributes = 0x%x, share_access = 0x%x, "
3447                   "create_disposition = 0x%x create_options = 0x%x "
3448                   "oplock_request = 0x%x "
3449                   "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3450                   "fname = %s\n",
3451                   (unsigned int)access_mask,
3452                   (unsigned int)file_attributes,
3453                   (unsigned int)share_access,
3454                   (unsigned int)create_disposition,
3455                   (unsigned int)create_options,
3456                   (unsigned int)oplock_request,
3457                   (unsigned int)root_dir_fid,
3458                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3459
3460         /*
3461          * Calculate the filename from the root_dir_if if necessary.
3462          */
3463
3464         if (root_dir_fid != 0) {
3465                 status = get_relative_fid_filename(conn, req, root_dir_fid,
3466                                                    smb_fname);
3467                 if (!NT_STATUS_IS_OK(status)) {